diff options
Diffstat (limited to 'arch/mips/include/asm/mach-loongson64/dma-coherence.h')
| -rw-r--r-- | arch/mips/include/asm/mach-loongson64/dma-coherence.h | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/arch/mips/include/asm/mach-loongson64/dma-coherence.h b/arch/mips/include/asm/mach-loongson64/dma-coherence.h new file mode 100644 index 000000000000..1602a9e9e8c2 --- /dev/null +++ b/arch/mips/include/asm/mach-loongson64/dma-coherence.h @@ -0,0 +1,85 @@ +/* + * 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, 07 Ralf Baechle <ralf@linux-mips.org> + * Copyright (C) 2007 Lemote, Inc. & Institute of Computing Technology + * Author: Fuxin Zhang, zhangfx@lemote.com + * + */ +#ifndef __ASM_MACH_LOONGSON64_DMA_COHERENCE_H +#define __ASM_MACH_LOONGSON64_DMA_COHERENCE_H + +#ifdef CONFIG_SWIOTLB +#include <linux/swiotlb.h> +#endif + +struct device; + +extern dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr); +extern phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr); +static inline dma_addr_t plat_map_dma_mem(struct device *dev, void *addr, + size_t size) +{ +#ifdef CONFIG_CPU_LOONGSON3 + return phys_to_dma(dev, virt_to_phys(addr)); +#else + return virt_to_phys(addr) | 0x80000000; +#endif +} + +static inline dma_addr_t plat_map_dma_mem_page(struct device *dev, + struct page *page) +{ +#ifdef CONFIG_CPU_LOONGSON3 + return phys_to_dma(dev, page_to_phys(page)); +#else + return page_to_phys(page) | 0x80000000; +#endif +} + +static inline unsigned long plat_dma_addr_to_phys(struct device *dev, + dma_addr_t dma_addr) +{ +#if defined(CONFIG_CPU_LOONGSON3) && defined(CONFIG_64BIT) + return dma_to_phys(dev, dma_addr); +#elif defined(CONFIG_CPU_LOONGSON2F) && defined(CONFIG_64BIT) + return (dma_addr > 0x8fffffff) ? dma_addr : (dma_addr & 0x0fffffff); +#else + return dma_addr & 0x7fffffff; +#endif +} + +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_NONCOHERENT + return 0; +#else + return 1; +#endif /* CONFIG_DMA_NONCOHERENT */ +} + +static inline void plat_post_dma_flush(struct device *dev) +{ +} + +#endif /* __ASM_MACH_LOONGSON64_DMA_COHERENCE_H */ |