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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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b02c2b0bfd
Usually dma_supported decisions are done by the dma_map_ops instance. Switch sparc to that model by providing a ->dma_supported instance for sbus that always returns false, and implementations tailored to the sun4u and sun4v cases for sparc64, and leave it unimplemented for PCI on sparc32, which means always supported. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: David S. Miller <davem@davemloft.net>
35 lines
817 B
C
35 lines
817 B
C
#ifndef ___ASM_SPARC_DMA_MAPPING_H
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#define ___ASM_SPARC_DMA_MAPPING_H
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#include <linux/scatterlist.h>
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#include <linux/mm.h>
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#include <linux/dma-debug.h>
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static inline 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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{
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/* Since dma_{alloc,free}_noncoherent() allocated coherent memory, this
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* routine can be a nop.
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*/
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}
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extern const struct dma_map_ops *dma_ops;
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extern const struct dma_map_ops pci32_dma_ops;
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extern struct bus_type pci_bus_type;
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static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
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{
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#ifdef CONFIG_SPARC_LEON
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if (sparc_cpu_model == sparc_leon)
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return &pci32_dma_ops;
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#endif
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#if defined(CONFIG_SPARC32) && defined(CONFIG_PCI)
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if (bus == &pci_bus_type)
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return &pci32_dma_ops;
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#endif
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return dma_ops;
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}
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#endif
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