1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef _ASM_IA64_DMA_MAPPING_H
 3#define _ASM_IA64_DMA_MAPPING_H
 4
 5/*
 6 * Copyright (C) 2003-2004 Hewlett-Packard Co
 7 *	David Mosberger-Tang <davidm@hpl.hp.com>
 8 */
 9extern const struct dma_map_ops *dma_ops;
 
 
 
10
11static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
12{
13	return dma_ops;
 
 
 
 
14}
15
16#endif /* _ASM_IA64_DMA_MAPPING_H */

 
  1#ifndef _ASM_IA64_DMA_MAPPING_H
  2#define _ASM_IA64_DMA_MAPPING_H
  3
  4/*
  5 * Copyright (C) 2003-2004 Hewlett-Packard Co
  6 *	David Mosberger-Tang <davidm@hpl.hp.com>
  7 */
  8#include <asm/machvec.h>
  9#include <linux/scatterlist.h>
 10#include <asm/swiotlb.h>
 11#include <linux/dma-debug.h>
 12
 13#define ARCH_HAS_DMA_GET_REQUIRED_MASK
 14
 15#define DMA_ERROR_CODE 0
 16
 17extern struct dma_map_ops *dma_ops;
 18extern struct ia64_machine_vector ia64_mv;
 19extern void set_iommu_machvec(void);
 20
 21extern void machvec_dma_sync_single(struct device *, dma_addr_t, size_t,
 22				    enum dma_data_direction);
 23extern void machvec_dma_sync_sg(struct device *, struct scatterlist *, int,
 24				enum dma_data_direction);
 25
 26static inline void *dma_alloc_coherent(struct device *dev, size_t size,
 27				       dma_addr_t *daddr, gfp_t gfp)
 28{
 29	struct dma_map_ops *ops = platform_dma_get_ops(dev);
 30	void *caddr;
 31
 32	caddr = ops->alloc_coherent(dev, size, daddr, gfp);
 33	debug_dma_alloc_coherent(dev, size, *daddr, caddr);
 34	return caddr;
 35}
 36
 37static inline void dma_free_coherent(struct device *dev, size_t size,
 38				     void *caddr, dma_addr_t daddr)
 39{
 40	struct dma_map_ops *ops = platform_dma_get_ops(dev);
 41	debug_dma_free_coherent(dev, size, caddr, daddr);
 42	ops->free_coherent(dev, size, caddr, daddr);
 43}
 44
 45#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
 46#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
 47
 48#define get_dma_ops(dev) platform_dma_get_ops(dev)
 49
 50#include <asm-generic/dma-mapping-common.h>
 51
 52static inline int dma_mapping_error(struct device *dev, dma_addr_t daddr)
 53{
 54	struct dma_map_ops *ops = platform_dma_get_ops(dev);
 55	return ops->mapping_error(dev, daddr);
 56}
 57
 58static inline int dma_supported(struct device *dev, u64 mask)
 59{
 60	struct dma_map_ops *ops = platform_dma_get_ops(dev);
 61	return ops->dma_supported(dev, mask);
 62}
 63
 64static inline int
 65dma_set_mask (struct device *dev, u64 mask)
 66{
 67	if (!dev->dma_mask || !dma_supported(dev, mask))
 68		return -EIO;
 69	*dev->dma_mask = mask;
 70	return 0;
 71}
 72
 73static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
 74{
 75	if (!dev->dma_mask)
 76		return 0;
 77
 78	return addr + size - 1 <= *dev->dma_mask;
 79}
 80
 81static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
 82{
 83	return paddr;
 84}
 85
 86static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr)
 87{
 88	return daddr;
 89}
 90
 91static inline void
 92dma_cache_sync (struct device *dev, void *vaddr, size_t size,
 93	enum dma_data_direction dir)
 94{
 95	/*
 96	 * IA-64 is cache-coherent, so this is mostly a no-op.  However, we do need to
 97	 * ensure that dma_cache_sync() enforces order, hence the mb().
 98	 */
 99	mb();
100}
101
102#endif /* _ASM_IA64_DMA_MAPPING_H */