Some cross-platform drivers rely on this header present. Make it so for x86.
It's just a copy'n'paste of arch/arm/include/asm/dma-mapping.h.
Suggested-by: Bin Meng bmeng.cn@gmail.com Reviewed-by: Simon Glass sjg@chromium.org Reviewed-by: Bin Meng bmeng.cn@gmail.com Signed-off-by: Andy Shevchenko andriy.shevchenko@linux.intel.com --- arch/x86/include/asm/dma-mapping.h | 41 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 arch/x86/include/asm/dma-mapping.h
diff --git a/arch/x86/include/asm/dma-mapping.h b/arch/x86/include/asm/dma-mapping.h new file mode 100644 index 0000000000..7de4c08e36 --- /dev/null +++ b/arch/x86/include/asm/dma-mapping.h @@ -0,0 +1,41 @@ +/* + * (C) Copyright 2007 + * Stelian Pop stelian@popies.net + * Lead Tech Design <www.leadtechdesign.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ +#ifndef __ASM_X86_DMA_MAPPING_H +#define __ASM_X86_DMA_MAPPING_H + +#define dma_mapping_error(x, y) 0 + +enum dma_data_direction { + DMA_BIDIRECTIONAL = 0, + DMA_TO_DEVICE = 1, + DMA_FROM_DEVICE = 2, +}; + +static inline void *dma_alloc_coherent(size_t len, unsigned long *handle) +{ + *handle = (unsigned long)memalign(ARCH_DMA_MINALIGN, len); + return (void *)*handle; +} + +static inline void dma_free_coherent(void *addr) +{ + free(addr); +} + +static inline unsigned long dma_map_single(volatile void *vaddr, size_t len, + enum dma_data_direction dir) +{ + return (unsigned long)vaddr; +} + +static inline void dma_unmap_single(volatile void *vaddr, size_t len, + unsigned long paddr) +{ +} + +#endif /* __ASM_X86_DMA_MAPPING_H */