函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:include\linux\dma-mapping.h Create Date:2022-07-27 06:51:41
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：dma_unmap_page_attrs

函数原型：static inline void dma_unmap_page_attrs(struct device *dev, dma_addr_t addr, size_t size, enum dma_data_direction dir, unsigned long attrs)

返回类型：void

参数：

类型参数名称
struct device *dev
dma_addr_taddr
size_tsize
enum dma_data_directiondir
unsigned longattrs
294  ops等于get_dma_ops(dev)
296  BUG_ON(!valid_dma_direction(dir))
297  如果dma_is_direct(ops)则dma_direct_unmap_page(dev, addr, size, dir, attrs)
299  否则如果unmap_page则unmap_page(dev, addr, size, dir, attrs)
301  debug_dma_unmap_page(dev, addr, size, dir)
调用者
名称描述
dma_unmap_single_attrs