1#include <linux/dma-mapping.h>
 
 
 2
 3/* Set this to 1 if there is a HW IOMMU in the system */
 4int iommu_detected __read_mostly;
 5
 6struct dma_map_ops *dma_ops;
 7EXPORT_SYMBOL(dma_ops);
 8
 9#define PREALLOC_DMA_DEBUG_ENTRIES (1 << 16)
10
11static int __init dma_init(void)
12{
13	dma_debug_init(PREALLOC_DMA_DEBUG_ENTRIES);
14
15	return 0;
16}
17fs_initcall(dma_init);
18
19struct dma_map_ops *dma_get_ops(struct device *dev)
20{
21	return dma_ops;
22}
23EXPORT_SYMBOL(dma_get_ops);

 1// SPDX-License-Identifier: GPL-2.0
 2#include <linux/dma-mapping.h>
 3#include <linux/swiotlb.h>
 4#include <linux/export.h>
 5
 6/* Set this to 1 if there is a HW IOMMU in the system */
 7int iommu_detected __read_mostly;
 8
 9const struct dma_map_ops *dma_ops;
10EXPORT_SYMBOL(dma_ops);
11
12#define PREALLOC_DMA_DEBUG_ENTRIES (1 << 16)
13
14static int __init dma_init(void)
15{
16	dma_debug_init(PREALLOC_DMA_DEBUG_ENTRIES);
17
18	return 0;
19}
20fs_initcall(dma_init);
21
22const struct dma_map_ops *dma_get_ops(struct device *dev)
23{
24	return dma_ops;
25}
26EXPORT_SYMBOL(dma_get_ops);
27
28#ifdef CONFIG_SWIOTLB
29void __init swiotlb_dma_init(void)
30{
31	dma_ops = &swiotlb_dma_ops;
32	swiotlb_init(1);
33}
34#endif