arch/riscv/include/asm/dma-noncoherent.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright (C) 2023 Renesas Electronics Corp.
   4  */
   5
   6 #ifndef __ASM_DMA_NONCOHERENT_H
   7 #define __ASM_DMA_NONCOHERENT_H
   8
   9 #include <linux/dma-direct.h>
  10
  11 /*
  12  * struct riscv_nonstd_cache_ops - Structure for non-standard CMO function pointers
  13  *
  14  * @wback: Function pointer for cache writeback
  15  * @inv: Function pointer for invalidating cache
  16  * @wback_inv: Function pointer for flushing the cache (writeback + invalidating)
  17  */
  18 struct riscv_nonstd_cache_ops {
  19         void (*wback)(phys_addr_t paddr, size_t size);
  20         void (*inv)(phys_addr_t paddr, size_t size);
  21         void (*wback_inv)(phys_addr_t paddr, size_t size);
  22 };
  23
  24 extern struct riscv_nonstd_cache_ops noncoherent_cache_ops;
  25
  26 void riscv_noncoherent_register_cache_ops(const struct riscv_nonstd_cache_ops *ops);
  27
  28 #endif  /* __ASM_DMA_NONCOHERENT_H */