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e37e0ee019
- turn dma_cache_sync into a dma_map_ops instance and remove
implementation that purely are dead because the architecture
doesn't support noncoherent allocations
- add a flag for busses that need DMA configuration (Robin Murphy)
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Merge tag 'dma-mapping-4.15' of git://git.infradead.org/users/hch/dma-mapping
Pull dma-mapping updates from Christoph Hellwig:
- turn dma_cache_sync into a dma_map_ops instance and remove
implementation that purely are dead because the architecture doesn't
support noncoherent allocations
- add a flag for busses that need DMA configuration (Robin Murphy)
* tag 'dma-mapping-4.15' of git://git.infradead.org/users/hch/dma-mapping:
dma-mapping: turn dma_cache_sync into a dma_map_ops method
sh: make dma_cache_sync a no-op
xtensa: make dma_cache_sync a no-op
unicore32: make dma_cache_sync a no-op
powerpc: make dma_cache_sync a no-op
mn10300: make dma_cache_sync a no-op
microblaze: make dma_cache_sync a no-op
ia64: make dma_cache_sync a no-op
frv: make dma_cache_sync a no-op
x86: make dma_cache_sync a no-op
floppy: consolidate the dummy fd_cacheflush definition
drivers: flag buses which demand DMA configuration
49 lines
1.2 KiB
C
49 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_IA64_DMA_MAPPING_H
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#define _ASM_IA64_DMA_MAPPING_H
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/*
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* Copyright (C) 2003-2004 Hewlett-Packard Co
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* David Mosberger-Tang <davidm@hpl.hp.com>
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*/
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#include <asm/machvec.h>
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#include <linux/scatterlist.h>
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#include <asm/swiotlb.h>
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#include <linux/dma-debug.h>
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#define ARCH_HAS_DMA_GET_REQUIRED_MASK
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extern const struct dma_map_ops *dma_ops;
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extern struct ia64_machine_vector ia64_mv;
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extern void set_iommu_machvec(void);
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extern void machvec_dma_sync_single(struct device *, dma_addr_t, size_t,
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enum dma_data_direction);
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extern void machvec_dma_sync_sg(struct device *, struct scatterlist *, int,
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enum dma_data_direction);
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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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return platform_dma_get_ops(NULL);
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}
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static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
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{
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if (!dev->dma_mask)
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return 0;
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return addr + size - 1 <= *dev->dma_mask;
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}
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static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
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{
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return paddr;
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}
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static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr)
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{
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return daddr;
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}
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#endif /* _ASM_IA64_DMA_MAPPING_H */
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