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_map_page_attrs

函数原型:static inline dma_addr_t dma_map_page_attrs(struct device *dev, struct page *page, size_t offset, size_t size, enum dma_data_direction dir, unsigned long attrs)

返回类型:dma_addr_t

参数:

类型参数名称
struct device *dev
struct page *page
size_toffset
size_tsize
enum dma_data_directiondir
unsigned longattrs
278  ops等于get_dma_ops(dev)
281  BUG_ON(!valid_dma_direction(dir))
282  如果dma_is_direct(ops)则addr等于dma_direct_map_page(dev, page, offset, size, dir, attrs)
284  否则addr等于map_page(dev, page, offset, size, dir, attrs)
286  debug_dma_map_page(dev, page, offset, size, dir, addr)
288  返回:addr
调用者
名称描述
dma_map_single_attrs