| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 2 | #include <linux/dma-direct.h> |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 3 | #include <linux/export.h> |
| 4 | |
| 5 | /* Set this to 1 if there is a HW IOMMU in the system */ |
| 6 | int iommu_detected __read_mostly; |
| 7 | |
| 8 | const struct dma_map_ops *dma_ops; |
| 9 | EXPORT_SYMBOL(dma_ops); |
| 10 | |
| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 11 | void *arch_dma_alloc(struct device *dev, size_t size, |
| 12 | dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs) |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 13 | { |
| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 14 | return dma_direct_alloc_pages(dev, size, dma_handle, gfp, attrs); |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 15 | } |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 16 | |
| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 17 | void arch_dma_free(struct device *dev, size_t size, void *cpu_addr, |
| 18 | dma_addr_t dma_addr, unsigned long attrs) |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 19 | { |
| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 20 | dma_direct_free_pages(dev, size, cpu_addr, dma_addr, attrs); |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 21 | } |
| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 22 | |
| 23 | long arch_dma_coherent_to_pfn(struct device *dev, void *cpu_addr, |
| 24 | dma_addr_t dma_addr) |
| 25 | { |
| 26 | return page_to_pfn(virt_to_page(cpu_addr)); |
| 27 | } |