1/* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * Copyright (C) 2006 Ralf Baechle <ralf@linux-mips.org> 7 */ 8#ifndef __ASM_MACH_JAZZ_DMA_COHERENCE_H 9#define __ASM_MACH_JAZZ_DMA_COHERENCE_H 10 11#include <asm/jazzdma.h> 12 13struct device; 14 15static dma_addr_t plat_map_dma_mem(struct device *dev, void *addr, size_t size) 16{ 17 return vdma_alloc(virt_to_phys(addr), size); 18} 19 20static dma_addr_t plat_map_dma_mem_page(struct device *dev, struct page *page) 21{ 22 return vdma_alloc(page_to_phys(page), PAGE_SIZE); 23} 24 25static unsigned long plat_dma_addr_to_phys(struct device *dev, 26 dma_addr_t dma_addr) 27{ 28 return vdma_log2phys(dma_addr); 29} 30 31static void plat_unmap_dma_mem(struct device *dev, dma_addr_t dma_addr, 32 size_t size, enum dma_data_direction direction) 33{ 34 vdma_free(dma_addr); 35} 36 37static inline int plat_dma_supported(struct device *dev, u64 mask) 38{ 39 /* 40 * we fall back to GFP_DMA when the mask isn't all 1s, 41 * so we can't guarantee allocations that must be 42 * within a tighter range than GFP_DMA.. 43 */ 44 if (mask < DMA_BIT_MASK(24)) 45 return 0; 46 47 return 1; 48} 49 50static inline void plat_extra_sync_for_device(struct device *dev) 51{ 52 return; 53} 54 55static inline int plat_dma_mapping_error(struct device *dev, 56 dma_addr_t dma_addr) 57{ 58 return 0; 59} 60 61static inline int plat_device_is_coherent(struct device *dev) 62{ 63 return 0; 64} 65 66#endif /* __ASM_MACH_JAZZ_DMA_COHERENCE_H */ 67