arch/ia64/include/asm/dma-mapping.h

   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  */
   9 #include <asm/machvec.h>
  10 #include <linux/scatterlist.h>
  11 #include <asm/swiotlb.h>
  12 #include <linux/dma-debug.h>
  13
  14 #define ARCH_HAS_DMA_GET_REQUIRED_MASK
  15
  16 extern const struct dma_map_ops *dma_ops;
  17 extern struct ia64_machine_vector ia64_mv;
  18 extern void set_iommu_machvec(void);
  19
  20 extern void machvec_dma_sync_single(struct device *, dma_addr_t, size_t,
  21                                     enum dma_data_direction);
  22 extern void machvec_dma_sync_sg(struct device *, struct scatterlist *, int,
  23                                 enum dma_data_direction);
  24
  25 static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
  26 {
  27         return platform_dma_get_ops(NULL);
  28 }
  29
  30 static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
  31 {
  32         if (!dev->dma_mask)
  33                 return 0;
  34
  35         return addr + size - 1 <= *dev->dma_mask;
  36 }
  37
  38 static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
  39 {
  40         return paddr;
  41 }
  42
  43 static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr)
  44 {
  45         return daddr;
  46 }
  47
  48 #endif /* _ASM_IA64_DMA_MAPPING_H */