/* * Copyright (C) 2012 ARM Ltd. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ #ifndef __ASM_DMA_MAPPING_H #define __ASM_DMA_MAPPING_H #ifdef __KERNEL__ #include <linux/types.h> #include <linux/vmalloc.h> #include <xen/xen.h> #include <asm/xen/hypervisor.h> extern const struct dma_map_ops dummy_dma_ops; static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus) { /* * We expect no ISA devices, and all other DMA masters are expected to * have someone call arch_setup_dma_ops at device creation time. */ return &dummy_dma_ops; } void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size, const struct iommu_ops *iommu, bool coherent); #define arch_setup_dma_ops arch_setup_dma_ops #ifdef CONFIG_IOMMU_DMA void arch_teardown_dma_ops(struct device *dev); #define arch_teardown_dma_ops arch_teardown_dma_ops #endif /* do not use this function in a driver */ static inline bool is_device_dma_coherent(struct device *dev) { return dev->archdata.dma_coherent; } static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) { dma_addr_t dev_addr = (dma_addr_t)paddr; return dev_addr - ((dma_addr_t)dev->dma_pfn_offset << PAGE_SHIFT); } static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t dev_addr) { phys_addr_t paddr = (phys_addr_t)dev_addr; return paddr + ((phys_addr_t)dev->dma_pfn_offset << PAGE_SHIFT); } static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size) { if (!dev->dma_mask) return false; return addr + size - 1 <= *dev->dma_mask; } static inline void dma_mark_clean(void *addr, size_t size) { } /* Override for dma_max_pfn() */ static inline unsigned long dma_max_pfn(struct device *dev) { dma_addr_t dma_max = (dma_addr_t)*dev->dma_mask; return (ulong)dma_to_phys(dev, dma_max) >> PAGE_SHIFT; } #define dma_max_pfn(dev) dma_max_pfn(dev) #endif /* __KERNEL__ */ #endif /* __ASM_DMA_MAPPING_H */
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dma-mapping.h | File | 2.42 KB | 0644 |
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hw_breakpoint.h | File | 4.46 KB | 0644 |
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hwcap.h | File | 1.86 KB | 0644 |
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hypervisor.h | File | 144 B | 0644 |
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memory.h | File | 9.16 KB | 0644 |
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mmu.h | File | 2.76 KB | 0644 |
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suspend.h | File | 1.65 KB | 0644 |
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sync_bitops.h | File | 1.11 KB | 0644 |
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system_misc.h | File | 1.86 KB | 0644 |
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topology.h | File | 1.29 KB | 0644 |
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