| // SPDX-License-Identifier: GPL-2.0 |
| #include <linux/dma-mapping.h> |
| #include <linux/swiotlb.h> |
| #include <linux/export.h> |
| |
| /* Set this to 1 if there is a HW IOMMU in the system */ |
| int iommu_detected __read_mostly; |
| |
| const struct dma_map_ops *dma_ops; |
| EXPORT_SYMBOL(dma_ops); |
| |
| #define PREALLOC_DMA_DEBUG_ENTRIES (1 << 16) |
| |
| static int __init dma_init(void) |
| { |
| dma_debug_init(PREALLOC_DMA_DEBUG_ENTRIES); |
| |
| return 0; |
| } |
| fs_initcall(dma_init); |
| |
| const struct dma_map_ops *dma_get_ops(struct device *dev) |
| { |
| return dma_ops; |
| } |
| EXPORT_SYMBOL(dma_get_ops); |
| |
| #ifdef CONFIG_SWIOTLB |
| void __init swiotlb_dma_init(void) |
| { |
| dma_ops = &swiotlb_dma_ops; |
| swiotlb_init(1); |
| } |
| #endif |
