函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\dma\debug.c Create Date:2022-07-27 11:35:15
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称:debug_dma_map_resource

函数原型:void debug_dma_map_resource(struct device *dev, phys_addr_t addr, size_t size, int direction, dma_addr_t dma_addr)

返回类型:void

参数:

类型参数名称
struct device *dev
phys_addr_taddr
size_tsize
intdirection
dma_addr_tdma_addr
1497  如果此条件成立可能性小(为编译器优化)(dma_debug_disabled())则返回
1500  entry等于struct dma_entry allocator* The next two functions implement the allocator for* struct dma_debug_entries.
1501  如果非entry则返回
1504  type等于dma_debug_resource
1505  dev等于dev
1506  pfn等于PHYS_PFN(addr)
1507  offset等于offset_in_page(addr)
1508  size等于size
1509  dev_addr等于dma_addr
1510  direction等于direction
1511  map_err_type等于MAP_ERR_NOT_CHECKED
1513  Wrapper function for adding an entry to the hash.* This function takes care of locking itself.