author | Florian Westphal <fw@strlen.de> |
Thu, 09 Apr 2009 12:07:21 +0200 | |
changeset 2 | d1f6d8b6f81c |
parent 0 | aa628870c1d3 |
permissions | -rw-r--r-- |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#ifndef _ASM_X86_DMA_MAPPING_H |
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#define _ASM_X86_DMA_MAPPING_H |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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Port of Linux 2.6.28 for use with network simulation cradle.
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/* |
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* IOMMU interface. See Documentation/PCI/PCI-DMA-mapping.txt and |
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* Documentation/DMA-API.txt for documentation. |
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Port of Linux 2.6.28 for use with network simulation cradle.
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*/ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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Port of Linux 2.6.28 for use with network simulation cradle.
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#include <linux/scatterlist.h> |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#include <asm/io.h> |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#include <asm/swiotlb.h> |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#include <asm-generic/dma-coherent.h> |
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Port of Linux 2.6.28 for use with network simulation cradle.
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extern dma_addr_t bad_dma_address; |
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extern int iommu_merge; |
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extern struct device x86_dma_fallback_dev; |
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extern int panic_on_overflow; |
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struct dma_mapping_ops { |
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int (*mapping_error)(struct device *dev, |
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dma_addr_t dma_addr); |
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void* (*alloc_coherent)(struct device *dev, size_t size, |
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dma_addr_t *dma_handle, gfp_t gfp); |
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void (*free_coherent)(struct device *dev, size_t size, |
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void *vaddr, dma_addr_t dma_handle); |
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dma_addr_t (*map_single)(struct device *hwdev, phys_addr_t ptr, |
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size_t size, int direction); |
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void (*unmap_single)(struct device *dev, dma_addr_t addr, |
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size_t size, int direction); |
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void (*sync_single_for_cpu)(struct device *hwdev, |
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dma_addr_t dma_handle, size_t size, |
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int direction); |
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void (*sync_single_for_device)(struct device *hwdev, |
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dma_addr_t dma_handle, size_t size, |
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int direction); |
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void (*sync_single_range_for_cpu)(struct device *hwdev, |
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dma_addr_t dma_handle, unsigned long offset, |
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size_t size, int direction); |
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void (*sync_single_range_for_device)(struct device *hwdev, |
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dma_addr_t dma_handle, unsigned long offset, |
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size_t size, int direction); |
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void (*sync_sg_for_cpu)(struct device *hwdev, |
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struct scatterlist *sg, int nelems, |
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int direction); |
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void (*sync_sg_for_device)(struct device *hwdev, |
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struct scatterlist *sg, int nelems, |
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int direction); |
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int (*map_sg)(struct device *hwdev, struct scatterlist *sg, |
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int nents, int direction); |
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void (*unmap_sg)(struct device *hwdev, |
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struct scatterlist *sg, int nents, |
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int direction); |
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int (*dma_supported)(struct device *hwdev, u64 mask); |
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int is_phys; |
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}; |
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extern struct dma_mapping_ops *dma_ops; |
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static inline struct dma_mapping_ops *get_dma_ops(struct device *dev) |
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{ |
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#ifdef CONFIG_X86_32 |
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return dma_ops; |
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#else |
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if (unlikely(!dev) || !dev->archdata.dma_ops) |
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return dma_ops; |
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else |
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return dev->archdata.dma_ops; |
2 | 68 |
#endif |
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} |
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|
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/* Make sure we keep the same behaviour */ |
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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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struct dma_mapping_ops *ops = get_dma_ops(dev); |
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if (ops->mapping_error) |
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return ops->mapping_error(dev, dma_addr); |
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|
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return (dma_addr == bad_dma_address); |
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} |
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#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f) |
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#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h) |
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#define dma_is_consistent(d, h) (1) |
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extern int dma_supported(struct device *hwdev, u64 mask); |
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extern int dma_set_mask(struct device *dev, u64 mask); |
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extern void *dma_generic_alloc_coherent(struct device *dev, size_t size, |
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dma_addr_t *dma_addr, gfp_t flag); |
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static inline dma_addr_t |
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dma_map_single(struct device *hwdev, void *ptr, size_t size, |
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int direction) |
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{ |
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struct dma_mapping_ops *ops = get_dma_ops(hwdev); |
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|
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BUG_ON(!valid_dma_direction(direction)); |
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return ops->map_single(hwdev, virt_to_phys(ptr), size, direction); |
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} |
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|
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static inline void |
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dma_unmap_single(struct device *dev, dma_addr_t addr, size_t size, |
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int direction) |
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{ |
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struct dma_mapping_ops *ops = get_dma_ops(dev); |
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|
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BUG_ON(!valid_dma_direction(direction)); |
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if (ops->unmap_single) |
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ops->unmap_single(dev, addr, size, direction); |
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} |
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|
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static inline int |
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113 |
dma_map_sg(struct device *hwdev, struct scatterlist *sg, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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114 |
int nents, int direction) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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115 |
{ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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116 |
struct dma_mapping_ops *ops = get_dma_ops(hwdev); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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117 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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118 |
BUG_ON(!valid_dma_direction(direction)); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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119 |
return ops->map_sg(hwdev, sg, nents, direction); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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120 |
} |
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Port of Linux 2.6.28 for use with network simulation cradle.
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121 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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122 |
static inline void |
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Port of Linux 2.6.28 for use with network simulation cradle.
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123 |
dma_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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124 |
int direction) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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125 |
{ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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struct dma_mapping_ops *ops = get_dma_ops(hwdev); |
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127 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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128 |
BUG_ON(!valid_dma_direction(direction)); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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129 |
if (ops->unmap_sg) |
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130 |
ops->unmap_sg(hwdev, sg, nents, direction); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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131 |
} |
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Port of Linux 2.6.28 for use with network simulation cradle.
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132 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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133 |
static inline void |
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Port of Linux 2.6.28 for use with network simulation cradle.
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134 |
dma_sync_single_for_cpu(struct device *hwdev, dma_addr_t dma_handle, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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135 |
size_t size, int direction) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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136 |
{ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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137 |
struct dma_mapping_ops *ops = get_dma_ops(hwdev); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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138 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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139 |
BUG_ON(!valid_dma_direction(direction)); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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140 |
if (ops->sync_single_for_cpu) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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141 |
ops->sync_single_for_cpu(hwdev, dma_handle, size, direction); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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142 |
flush_write_buffers(); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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143 |
} |
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Port of Linux 2.6.28 for use with network simulation cradle.
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144 |
|
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parents:
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145 |
static inline void |
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Port of Linux 2.6.28 for use with network simulation cradle.
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146 |
dma_sync_single_for_device(struct device *hwdev, dma_addr_t dma_handle, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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|
147 |
size_t size, int direction) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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148 |
{ |
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149 |
struct dma_mapping_ops *ops = get_dma_ops(hwdev); |
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150 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
151 |
BUG_ON(!valid_dma_direction(direction)); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
152 |
if (ops->sync_single_for_device) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
153 |
ops->sync_single_for_device(hwdev, dma_handle, size, direction); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
154 |
flush_write_buffers(); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
155 |
} |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
156 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
157 |
static inline void |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
158 |
dma_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dma_handle, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
159 |
unsigned long offset, size_t size, int direction) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
160 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
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|
161 |
struct dma_mapping_ops *ops = get_dma_ops(hwdev); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
162 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
163 |
BUG_ON(!valid_dma_direction(direction)); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
164 |
if (ops->sync_single_range_for_cpu) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
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|
165 |
ops->sync_single_range_for_cpu(hwdev, dma_handle, offset, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
166 |
size, direction); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
167 |
flush_write_buffers(); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
168 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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|
169 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
170 |
static inline void |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
171 |
dma_sync_single_range_for_device(struct device *hwdev, dma_addr_t dma_handle, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
172 |
unsigned long offset, size_t size, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
173 |
int direction) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
174 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
175 |
struct dma_mapping_ops *ops = get_dma_ops(hwdev); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
176 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
177 |
BUG_ON(!valid_dma_direction(direction)); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
178 |
if (ops->sync_single_range_for_device) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
179 |
ops->sync_single_range_for_device(hwdev, dma_handle, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
180 |
offset, size, direction); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
181 |
flush_write_buffers(); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
182 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
183 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
184 |
static inline void |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
185 |
dma_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
186 |
int nelems, int direction) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
187 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
188 |
struct dma_mapping_ops *ops = get_dma_ops(hwdev); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
189 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
190 |
BUG_ON(!valid_dma_direction(direction)); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
191 |
if (ops->sync_sg_for_cpu) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
192 |
ops->sync_sg_for_cpu(hwdev, sg, nelems, direction); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
193 |
flush_write_buffers(); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
194 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
195 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
196 |
static inline void |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
197 |
dma_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
198 |
int nelems, int direction) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
199 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
200 |
struct dma_mapping_ops *ops = get_dma_ops(hwdev); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
201 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
202 |
BUG_ON(!valid_dma_direction(direction)); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
203 |
if (ops->sync_sg_for_device) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
204 |
ops->sync_sg_for_device(hwdev, sg, nelems, direction); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
205 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
206 |
flush_write_buffers(); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
207 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
208 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
209 |
static inline dma_addr_t dma_map_page(struct device *dev, struct page *page, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
210 |
size_t offset, size_t size, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
211 |
int direction) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
212 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
213 |
struct dma_mapping_ops *ops = get_dma_ops(dev); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
214 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
215 |
BUG_ON(!valid_dma_direction(direction)); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
216 |
return ops->map_single(dev, page_to_phys(page) + offset, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
217 |
size, direction); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
218 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
219 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
220 |
static inline void dma_unmap_page(struct device *dev, dma_addr_t addr, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
221 |
size_t size, int direction) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
222 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
223 |
dma_unmap_single(dev, addr, size, direction); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
224 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
225 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
226 |
static inline void |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
227 |
dma_cache_sync(struct device *dev, void *vaddr, size_t size, |
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enum dma_data_direction dir) |
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{ |
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flush_write_buffers(); |
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} |
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static inline int dma_get_cache_alignment(void) |
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{ |
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/* no easy way to get cache size on all x86, so return the |
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* maximum possible, to be safe */ |
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return boot_cpu_data.x86_clflush_size; |
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} |
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|
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static inline unsigned long dma_alloc_coherent_mask(struct device *dev, |
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gfp_t gfp) |
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{ |
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unsigned long dma_mask = 0; |
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|
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dma_mask = dev->coherent_dma_mask; |
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if (!dma_mask) |
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dma_mask = (gfp & GFP_DMA) ? DMA_24BIT_MASK : DMA_32BIT_MASK; |
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|
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return dma_mask; |
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} |
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|
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static inline gfp_t dma_alloc_coherent_gfp_flags(struct device *dev, gfp_t gfp) |
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{ |
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unsigned long dma_mask = dma_alloc_coherent_mask(dev, gfp); |
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|
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if (dma_mask <= DMA_24BIT_MASK) |
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gfp |= GFP_DMA; |
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#ifdef CONFIG_X86_64 |
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if (dma_mask <= DMA_32BIT_MASK && !(gfp & GFP_DMA)) |
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gfp |= GFP_DMA32; |
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#endif |
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return gfp; |
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} |
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|
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static inline void * |
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dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, |
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gfp_t gfp) |
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{ |
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struct dma_mapping_ops *ops = get_dma_ops(dev); |
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void *memory; |
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|
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gfp &= ~(__GFP_DMA | __GFP_HIGHMEM | __GFP_DMA32); |
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|
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if (dma_alloc_from_coherent(dev, size, dma_handle, &memory)) |
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return memory; |
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|
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if (!dev) { |
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dev = &x86_dma_fallback_dev; |
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gfp |= GFP_DMA; |
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} |
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|
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if (!is_device_dma_capable(dev)) |
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return NULL; |
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284 |
|
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if (!ops->alloc_coherent) |
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return NULL; |
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287 |
|
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return ops->alloc_coherent(dev, size, dma_handle, |
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dma_alloc_coherent_gfp_flags(dev, gfp)); |
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290 |
} |
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291 |
|
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static inline void dma_free_coherent(struct device *dev, size_t size, |
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void *vaddr, dma_addr_t bus) |
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{ |
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struct dma_mapping_ops *ops = get_dma_ops(dev); |
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|
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WARN_ON(irqs_disabled()); /* for portability */ |
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298 |
|
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if (dma_release_from_coherent(dev, get_order(size), vaddr)) |
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300 |
return; |
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301 |
|
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302 |
if (ops->free_coherent) |
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303 |
ops->free_coherent(dev, size, vaddr, bus); |
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304 |
} |
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Port of Linux 2.6.28 for use with network simulation cradle.
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305 |
|
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306 |
#endif |