mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-27 20:55:09 +07:00
3b9c6c11f5
Architectures implement dma_is_consistent() in different ways (some misinterpret the definition of API in DMA-API.txt). So it hasn't been so useful for drivers. We have only one user of the API in tree. Unlikely out-of-tree drivers use the API. Even if we fix dma_is_consistent() in some architectures, it doesn't look useful at all. It was invented long ago for some old systems that can't allocate coherent memory at all. It's better to export only APIs that are definitely necessary for drivers. Let's remove this API. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
92 lines
2.3 KiB
C
92 lines
2.3 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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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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static inline void *dma_alloc_coherent(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_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_coherent)
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return NULL;
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memory = ops->alloc_coherent(dev, size, dma_handle, gfp);
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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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static inline void dma_free_coherent(struct device *dev, size_t size,
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void *vaddr, dma_addr_t dma_handle)
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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_coherent)
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ops->free_coherent(dev, size, vaddr, dma_handle);
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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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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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#endif /* __ASM_SH_DMA_MAPPING_H */
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