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 11:35:39
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：setup_io_tlb_npages

函数原型：static int __init setup_io_tlb_npages(char *str)

返回类型：int

参数：

类型参数名称
char *str
114  如果是数字则
115  The number of IO TLB blocks (in groups of 64) between io_tlb_start and* io_tlb_end. This is command line adjustable via setup_io_tlb_npages.等于转换字符串为无符号整形
117  The number of IO TLB blocks (in groups of 64) between io_tlb_start and* io_tlb_end. This is command line adjustable via setup_io_tlb_npages.等于@a is a power of 2 value (The number of IO TLB blocks (in groups of 64) between io_tlb_start and* io_tlb_end. This is command line adjustable via setup_io_tlb_npages., Maximum allowable number of contiguous slabs to map,* must be a power of 2. What is the appropriate value ?* The complexity of {map,unmap}_single is linearly dependent on this value.)
119  如果str恒等于','则str先自加
121  如果非字符串比较则
122  swiotlb_force = swiotlb=force
123  否则如果非字符串比较则
124  swiotlb_force = swiotlb=noforce
125  The number of IO TLB blocks (in groups of 64) between io_tlb_start and* io_tlb_end. This is command line adjustable via setup_io_tlb_npages.等于1
128  返回:0