函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\dma\swiotlb.c Create Date:2022-07-27 11:35:40
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：swiotlb_set_max_segment

函数原型：void swiotlb_set_max_segment(unsigned int val)

返回类型：void

参数：

类型参数名称
unsigned intval
148  如果(swiotlb_force == swiotlb=force )则Max segment that we can provide which (if pages are contingous) will* not be bounced (unless SWIOTLB_FORCE is set).等于1
150  否则Max segment that we can provide which (if pages are contingous) will* not be bounced (unless SWIOTLB_FORCE is set).等于unddown - round down to next specified multiple*@x: the value to round*@y: multiple to round down to* Rounds @x down to next multiple of @y. If @y will always be a power* of 2, consider using the faster round_down().(val, PAGE_SIZE)
调用者
名称描述
swiotlb_init_with_tbl
swiotlb_late_init_with_tbl