1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/dma-direct.h>
3 #include <linux/swiotlb.h>
4 #include <linux/export.h>
6 /* Set this to 1 if there is a HW IOMMU in the system */
7 int iommu_detected __read_mostly;
9 const struct dma_map_ops *dma_ops;
10 EXPORT_SYMBOL(dma_ops);
12 const struct dma_map_ops *dma_get_ops(struct device *dev)
16 EXPORT_SYMBOL(dma_get_ops);
19 void *arch_dma_alloc(struct device *dev, size_t size,
20 dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs)
22 return dma_direct_alloc_pages(dev, size, dma_handle, gfp, attrs);
25 void arch_dma_free(struct device *dev, size_t size, void *cpu_addr,
26 dma_addr_t dma_addr, unsigned long attrs)
28 dma_direct_free_pages(dev, size, cpu_addr, dma_addr, attrs);
31 long arch_dma_coherent_to_pfn(struct device *dev, void *cpu_addr,
34 return page_to_pfn(virt_to_page(cpu_addr));
37 void __init swiotlb_dma_init(void)