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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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50af1e9df2
Add dma-debug interface debug_dma_mapping_error() to debug drivers that fail to check dma mapping errors on addresses returned by dma_map_single() and dma_map_page() interfaces. Signed-off-by: Shuah Khan <shuah.khan@hp.com> Signed-off-by: Joerg Roedel <joro@8bytes.org>
101 lines
2.6 KiB
C
101 lines
2.6 KiB
C
#ifndef __ASM_SH_DMA_MAPPING_H
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#define __ASM_SH_DMA_MAPPING_H
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extern struct dma_map_ops *dma_ops;
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extern void no_iommu_init(void);
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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 dma_ops;
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}
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#include <asm-generic/dma-coherent.h>
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#include <asm-generic/dma-mapping-common.h>
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static inline int dma_supported(struct device *dev, u64 mask)
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{
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struct dma_map_ops *ops = get_dma_ops(dev);
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if (ops->dma_supported)
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return ops->dma_supported(dev, mask);
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return 1;
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}
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static inline int dma_set_mask(struct device *dev, u64 mask)
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{
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struct dma_map_ops *ops = get_dma_ops(dev);
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if (!dev->dma_mask || !dma_supported(dev, mask))
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return -EIO;
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if (ops->set_dma_mask)
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return ops->set_dma_mask(dev, mask);
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*dev->dma_mask = mask;
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return 0;
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}
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void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
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enum dma_data_direction dir);
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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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static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
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{
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struct dma_map_ops *ops = get_dma_ops(dev);
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debug_dma_mapping_error(dev, dma_addr);
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if (ops->mapping_error)
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return ops->mapping_error(dev, dma_addr);
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return dma_addr == 0;
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}
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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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if (dma_alloc_from_coherent(dev, size, dma_handle, &memory))
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return memory;
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if (!ops->alloc)
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return NULL;
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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 *vaddr, 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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if (dma_release_from_coherent(dev, get_order(size), vaddr))
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return;
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debug_dma_free_coherent(dev, size, vaddr, dma_handle);
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if (ops->free)
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ops->free(dev, size, vaddr, dma_handle, attrs);
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}
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/* arch/sh/mm/consistent.c */
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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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struct dma_attrs *attrs);
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extern void dma_generic_free_coherent(struct device *dev, size_t size,
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void *vaddr, dma_addr_t dma_handle,
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struct dma_attrs *attrs);
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#endif /* __ASM_SH_DMA_MAPPING_H */
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