| /* |
| * 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 */ |
