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 11:34:26
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：Dump mapping entries for debugging purposes

函数原型：void debug_dma_dump_mappings(struct device *dev)

返回类型：void

参数：

类型参数名称
struct device *dev
401  以idx小于HASH_SIZE循环
402  bucket等于Hash list to save the allocated dma addresses [idx]
406  spin_lock_irqsave( & lock, flags)
409  如果非dev或dev恒等于dev则
410  dev_info(dev, "%s idx %d P=%Lx N=%lx D=%Lx L=%Lx %s %s\n", type2name[type], idx, phys_addr(entry), pfn, dev_addr, size, dir2name[direction], maperr2str[map_err_type])
420  spin_unlock_irqrestore( & lock, flags)
421  cond_resched()