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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
ae49e807 AB |
2 | #ifndef __ASM_GENERIC_DMA_H |
3 | #define __ASM_GENERIC_DMA_H | |
4 | /* | |
5 | * This file traditionally describes the i8237 PC style DMA controller. | |
6 | * Most architectures don't have these any more and can get the minimal | |
7 | * implementation from kernel/dma.c by not defining MAX_DMA_CHANNELS. | |
8 | * | |
9 | * Some code relies on seeing MAX_DMA_ADDRESS though. | |
10 | */ | |
11 | #define MAX_DMA_ADDRESS PAGE_OFFSET | |
12 | ||
13 | extern int request_dma(unsigned int dmanr, const char *device_id); | |
14 | extern void free_dma(unsigned int dmanr); | |
15 | ||
16 | #endif /* __ASM_GENERIC_DMA_H */ |