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- /*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2006 Ralf Baechle <ralf@linux-mips.org>
- *
- */
- #ifndef __ASM_MACH_GENERIC_DMA_COHERENCE_H
- #define __ASM_MACH_GENERIC_DMA_COHERENCE_H
- struct device;
- static inline dma_addr_t plat_map_dma_mem(struct device *dev, void *addr,
- size_t size)
- {
- return virt_to_phys(addr);
- }
- static inline dma_addr_t plat_map_dma_mem_page(struct device *dev,
- struct page *page)
- {
- return page_to_phys(page);
- }
- static inline unsigned long plat_dma_addr_to_phys(struct device *dev,
- dma_addr_t dma_addr)
- {
- return dma_addr;
- }
- static inline void plat_unmap_dma_mem(struct device *dev, dma_addr_t dma_addr,
- size_t size, enum dma_data_direction direction)
- {
- }
- static inline int plat_dma_supported(struct device *dev, u64 mask)
- {
- /*
- * we fall back to GFP_DMA when the mask isn't all 1s,
- * so we can't guarantee allocations that must be
- * within a tighter range than GFP_DMA..
- */
- if (mask < DMA_BIT_MASK(24))
- return 0;
- return 1;
- }
- static inline int plat_device_is_coherent(struct device *dev)
- {
- #ifdef CONFIG_DMA_PERDEV_COHERENT
- return dev->archdata.dma_coherent;
- #else
- switch (coherentio) {
- default:
- case IO_COHERENCE_DEFAULT:
- return hw_coherentio;
- case IO_COHERENCE_ENABLED:
- return 1;
- case IO_COHERENCE_DISABLED:
- return 0;
- }
- #endif
- }
- #ifndef plat_post_dma_flush
- static inline void plat_post_dma_flush(struct device *dev)
- {
- }
- #endif
- #ifdef CONFIG_SWIOTLB
- static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
- {
- return paddr;
- }
- static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr)
- {
- return daddr;
- }
- #endif
- #endif /* __ASM_MACH_GENERIC_DMA_COHERENCE_H */
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