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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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815dd18788
Introduce a new architecture-specific get_arch_dma_ops() function that takes a struct bus_type * argument. Add get_dma_ops() in <linux/dma-mapping.h>. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Juergen Gross <jgross@suse.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: linux-arch@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: Russell King <linux@armlinux.org.uk> Cc: x86@kernel.org Signed-off-by: Doug Ledford <dledford@redhat.com>
80 lines
2.1 KiB
C
80 lines
2.1 KiB
C
/*
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* Copyright 2010 Tilera Corporation. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation, version 2.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU General Public License for
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* more details.
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*/
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#ifndef _ASM_TILE_DMA_MAPPING_H
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#define _ASM_TILE_DMA_MAPPING_H
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#include <linux/mm.h>
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#include <linux/scatterlist.h>
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#include <linux/cache.h>
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#include <linux/io.h>
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#ifdef __tilegx__
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#define ARCH_HAS_DMA_GET_REQUIRED_MASK
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#endif
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extern const struct dma_map_ops *tile_dma_map_ops;
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extern const struct dma_map_ops *gx_pci_dma_map_ops;
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extern const struct dma_map_ops *gx_legacy_pci_dma_map_ops;
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extern const struct dma_map_ops *gx_hybrid_pci_dma_map_ops;
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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 tile_dma_map_ops;
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}
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static inline dma_addr_t get_dma_offset(struct device *dev)
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{
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return dev->archdata.dma_offset;
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}
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static inline void set_dma_offset(struct device *dev, dma_addr_t off)
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{
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dev->archdata.dma_offset = off;
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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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static inline void dma_mark_clean(void *addr, size_t size) {}
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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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#define HAVE_ARCH_DMA_SET_MASK 1
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int dma_set_mask(struct device *dev, u64 mask);
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/*
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* dma_alloc_noncoherent() is #defined to return coherent memory,
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* so there's no need to do any flushing here.
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*/
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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 direction)
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{
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}
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#endif /* _ASM_TILE_DMA_MAPPING_H */
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