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 11:35:01
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：check_sync

函数原型：static void check_sync(struct device *dev, struct dma_debug_entry *ref, bool to_cpu)

返回类型：void

参数：

类型参数名称
struct device *dev
struct dma_debug_entry *ref
boolto_cpu
1141  bucket等于Request exclusive access to a hash bucket for a given dma_debug_entry.
1143  entry等于bucket_find_contain( & bucket, ref, & flags)
1145  如果非entry则
1150  转到:out
1153  如果size大于size则
1163  如果direction恒等于DMA_BIDIRECTIONAL则转到:out
1166  如果direction不等于direction则
1176  如果to_cpu且direction不等于DMA_FROM_DEVICE且direction不等于DMA_TO_DEVICE则
1186  如果非to_cpu且direction不等于DMA_TO_DEVICE且direction不等于DMA_FROM_DEVICE则
1196  如果sg_call_ents且type恒等于dma_debug_sg且sg_call_ents不等于sg_call_ents则
1204  out :
1205  Give up exclusive access to the hash bucket
调用者
名称描述
debug_dma_sync_single_for_cpu
debug_dma_sync_single_for_device
debug_dma_sync_sg_for_cpu
debug_dma_sync_sg_for_device