162306a36Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */ 262306a36Sopenharmony_ci#ifndef __ASM_GENERIC_DMA_H 362306a36Sopenharmony_ci#define __ASM_GENERIC_DMA_H 462306a36Sopenharmony_ci/* 562306a36Sopenharmony_ci * This file traditionally describes the i8237 PC style DMA controller. 662306a36Sopenharmony_ci * Most architectures don't have these any more and can get the minimal 762306a36Sopenharmony_ci * implementation from kernel/dma.c by not defining MAX_DMA_CHANNELS. 862306a36Sopenharmony_ci * 962306a36Sopenharmony_ci * Some code relies on seeing MAX_DMA_ADDRESS though. 1062306a36Sopenharmony_ci */ 1162306a36Sopenharmony_ci#define MAX_DMA_ADDRESS PAGE_OFFSET 1262306a36Sopenharmony_ci 1362306a36Sopenharmony_ciextern int request_dma(unsigned int dmanr, const char *device_id); 1462306a36Sopenharmony_ciextern void free_dma(unsigned int dmanr); 1562306a36Sopenharmony_ci 1662306a36Sopenharmony_ci#endif /* __ASM_GENERIC_DMA_H */ 17