1*b7026b0cSAndy Shevchenko /* 2*b7026b0cSAndy Shevchenko * (C) Copyright 2007 3*b7026b0cSAndy Shevchenko * Stelian Pop <stelian@popies.net> 4*b7026b0cSAndy Shevchenko * Lead Tech Design <www.leadtechdesign.com> 5*b7026b0cSAndy Shevchenko * 6*b7026b0cSAndy Shevchenko * SPDX-License-Identifier: GPL-2.0+ 7*b7026b0cSAndy Shevchenko */ 8*b7026b0cSAndy Shevchenko #ifndef __ASM_X86_DMA_MAPPING_H 9*b7026b0cSAndy Shevchenko #define __ASM_X86_DMA_MAPPING_H 10*b7026b0cSAndy Shevchenko 11*b7026b0cSAndy Shevchenko #define dma_mapping_error(x, y) 0 12*b7026b0cSAndy Shevchenko 13*b7026b0cSAndy Shevchenko enum dma_data_direction { 14*b7026b0cSAndy Shevchenko DMA_BIDIRECTIONAL = 0, 15*b7026b0cSAndy Shevchenko DMA_TO_DEVICE = 1, 16*b7026b0cSAndy Shevchenko DMA_FROM_DEVICE = 2, 17*b7026b0cSAndy Shevchenko }; 18*b7026b0cSAndy Shevchenko 19*b7026b0cSAndy Shevchenko static inline void *dma_alloc_coherent(size_t len, unsigned long *handle) 20*b7026b0cSAndy Shevchenko { 21*b7026b0cSAndy Shevchenko *handle = (unsigned long)memalign(ARCH_DMA_MINALIGN, len); 22*b7026b0cSAndy Shevchenko return (void *)*handle; 23*b7026b0cSAndy Shevchenko } 24*b7026b0cSAndy Shevchenko 25*b7026b0cSAndy Shevchenko static inline void dma_free_coherent(void *addr) 26*b7026b0cSAndy Shevchenko { 27*b7026b0cSAndy Shevchenko free(addr); 28*b7026b0cSAndy Shevchenko } 29*b7026b0cSAndy Shevchenko 30*b7026b0cSAndy Shevchenko static inline unsigned long dma_map_single(volatile void *vaddr, size_t len, 31*b7026b0cSAndy Shevchenko enum dma_data_direction dir) 32*b7026b0cSAndy Shevchenko { 33*b7026b0cSAndy Shevchenko return (unsigned long)vaddr; 34*b7026b0cSAndy Shevchenko } 35*b7026b0cSAndy Shevchenko 36*b7026b0cSAndy Shevchenko static inline void dma_unmap_single(volatile void *vaddr, size_t len, 37*b7026b0cSAndy Shevchenko unsigned long paddr) 38*b7026b0cSAndy Shevchenko { 39*b7026b0cSAndy Shevchenko } 40*b7026b0cSAndy Shevchenko 41*b7026b0cSAndy Shevchenko #endif /* __ASM_X86_DMA_MAPPING_H */ 42