| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2012 ARM Ltd. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License version 2 as |
| 6 | * published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License |
| 14 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 15 | */ |
| 16 | #ifndef __ASM_DMA_MAPPING_H |
| 17 | #define __ASM_DMA_MAPPING_H |
| 18 | |
| 19 | #ifdef __KERNEL__ |
| 20 | |
| 21 | #include <linux/types.h> |
| 22 | #include <linux/vmalloc.h> |
| 23 | |
| 24 | #include <xen/xen.h> |
| 25 | #include <asm/xen/hypervisor.h> |
| 26 | |
| 27 | extern const struct dma_map_ops dummy_dma_ops; |
| 28 | |
| 29 | static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus) |
| 30 | { |
| 31 | /* |
| 32 | * We expect no ISA devices, and all other DMA masters are expected to |
| 33 | * have someone call arch_setup_dma_ops at device creation time. |
| 34 | */ |
| 35 | return &dummy_dma_ops; |
| 36 | } |
| 37 | |
| 38 | void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size, |
| 39 | const struct iommu_ops *iommu, bool coherent); |
| 40 | #define arch_setup_dma_ops arch_setup_dma_ops |
| 41 | |
| 42 | #ifdef CONFIG_IOMMU_DMA |
| 43 | void arch_teardown_dma_ops(struct device *dev); |
| 44 | #define arch_teardown_dma_ops arch_teardown_dma_ops |
| 45 | #endif |
| 46 | |
| 47 | /* do not use this function in a driver */ |
| 48 | static inline bool is_device_dma_coherent(struct device *dev) |
| 49 | { |
| 50 | return dev->archdata.dma_coherent; |
| 51 | } |
| 52 | |
| 53 | #endif /* __KERNEL__ */ |
| 54 | #endif /* __ASM_DMA_MAPPING_H */ |