Tom Rini | 83d290c | 2018-05-06 17:58:06 -0400 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0+ */ |
ken kuo | 9f128bc | 2013-08-06 01:00:53 +0800 | [diff] [blame] | 2 | /* |
| 3 | * Copyright (C) 2013 Andes Technology Corporation |
| 4 | * Ken Kuo, Andes Technology Corporation <ken_kuo@andestech.com> |
ken kuo | 9f128bc | 2013-08-06 01:00:53 +0800 | [diff] [blame] | 5 | */ |
| 6 | #ifndef __ASM_NDS_DMA_MAPPING_H |
| 7 | #define __ASM_NDS_DMA_MAPPING_H |
| 8 | |
Vignesh Raghavendra | c0a5a81 | 2020-01-16 14:23:45 +0530 | [diff] [blame^] | 9 | #include <common.h> |
| 10 | #include <asm/cache.h> |
| 11 | #include <cpu_func.h> |
Masahiro Yamada | b27af39 | 2017-08-26 00:50:17 +0900 | [diff] [blame] | 12 | #include <linux/dma-direction.h> |
Vignesh Raghavendra | c0a5a81 | 2020-01-16 14:23:45 +0530 | [diff] [blame^] | 13 | #include <malloc.h> |
ken kuo | 9f128bc | 2013-08-06 01:00:53 +0800 | [diff] [blame] | 14 | |
| 15 | static void *dma_alloc_coherent(size_t len, unsigned long *handle) |
| 16 | { |
| 17 | *handle = (unsigned long)memalign(ARCH_DMA_MINALIGN, len); |
| 18 | return (void *)*handle; |
| 19 | } |
| 20 | |
| 21 | static inline unsigned long dma_map_single(volatile void *vaddr, size_t len, |
| 22 | enum dma_data_direction dir) |
| 23 | { |
Vignesh Raghavendra | c0a5a81 | 2020-01-16 14:23:45 +0530 | [diff] [blame^] | 24 | unsigned long addr = (unsigned long)vaddr; |
| 25 | |
| 26 | len = ALIGN(len, ARCH_DMA_MINALIGN); |
| 27 | |
| 28 | if (dir == DMA_FROM_DEVICE) |
| 29 | invalidate_dcache_range(addr, addr + len); |
| 30 | else |
| 31 | flush_dcache_range(addr, addr + len); |
| 32 | |
| 33 | return addr; |
ken kuo | 9f128bc | 2013-08-06 01:00:53 +0800 | [diff] [blame] | 34 | } |
| 35 | |
| 36 | static inline void dma_unmap_single(volatile void *vaddr, size_t len, |
Vignesh Raghavendra | c0a5a81 | 2020-01-16 14:23:45 +0530 | [diff] [blame^] | 37 | enum dma_data_direction dir) |
ken kuo | 9f128bc | 2013-08-06 01:00:53 +0800 | [diff] [blame] | 38 | { |
Vignesh Raghavendra | c0a5a81 | 2020-01-16 14:23:45 +0530 | [diff] [blame^] | 39 | unsigned long addr = (unsigned long)vaddr; |
| 40 | |
| 41 | len = ALIGN(len, ARCH_DMA_MINALIGN); |
| 42 | |
| 43 | if (dir != DMA_TO_DEVICE) |
| 44 | invalidate_dcache_range(addr, addr + len); |
ken kuo | 9f128bc | 2013-08-06 01:00:53 +0800 | [diff] [blame] | 45 | } |
| 46 | |
| 47 | #endif /* __ASM_NDS_DMA_MAPPING_H */ |