1 // SPDX-License-Identifier: GPL-2.0 1 // SPDX-License-Identifier: GPL-2.0
2 /* !! 2 #include <linux/kernel.h>
3 * Copyright (C) 2009-2010 PetaLogix !! 3 #include <linux/dma-mapping.h>
4 * Copyright (C) 2006 Benjamin Herrenschmidt, !! 4 #include <linux/dma-debug.h>
5 * <<
6 * Provide default implementations of the DMA <<
7 * directly mapped busses. <<
8 */ <<
9 5
10 #include <linux/device.h> !! 6 #define PREALLOC_DMA_DEBUG_ENTRIES (1 << 15)
11 #include <linux/dma-map-ops.h> <<
12 #include <linux/gfp.h> <<
13 #include <linux/export.h> <<
14 #include <linux/bug.h> <<
15 #include <asm/cacheflush.h> <<
16 7
17 static void __dma_sync(phys_addr_t paddr, size !! 8 static int __init dma_init(void)
18 enum dma_data_direction direct <<
19 { 9 {
20 switch (direction) { !! 10 dma_debug_init(PREALLOC_DMA_DEBUG_ENTRIES);
21 case DMA_TO_DEVICE: !! 11 return 0;
22 case DMA_BIDIRECTIONAL: <<
23 flush_dcache_range(paddr, padd <<
24 break; <<
25 case DMA_FROM_DEVICE: <<
26 invalidate_dcache_range(paddr, <<
27 break; <<
28 default: <<
29 BUG(); <<
30 } <<
31 } <<
32 <<
33 void arch_sync_dma_for_device(phys_addr_t padd <<
34 enum dma_data_direction dir) <<
35 { <<
36 __dma_sync(paddr, size, dir); <<
37 } <<
38 <<
39 void arch_sync_dma_for_cpu(phys_addr_t paddr, <<
40 enum dma_data_direction dir) <<
41 { <<
42 __dma_sync(paddr, size, dir); <<
43 } 12 }
>> 13 fs_initcall(dma_init);
44 14
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.