函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\dma\mapping.c Create Date:2022-07-27 11:32:27
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称:The whole dma_get_sgtable() idea is fundamentally unsafe - it seems* that the intention is to allow exporting memory allocated via the* coherent DMA APIs through the dma_buf API, which only accepts a* scattertable. This presents a couple of problems:* 1

函数原型:int dma_get_sgtable_attrs(struct device *dev, struct sg_table *sgt, void *cpu_addr, dma_addr_t dma_addr, size_t size, unsigned long attrs)

返回类型:int

参数:

类型参数名称
struct device *dev
struct sg_table *sgt
void *cpu_addr
dma_addr_tdma_addr
size_tsize
unsigned longattrs
139  ops等于get_dma_ops(dev)
141  如果dma_is_direct(ops)则返回:dma_direct_get_sgtable(dev, sgt, cpu_addr, dma_addr, size, attrs)
144  如果非get_sgtable则返回:负ENXIO
146  返回:get_sgtable(dev, sgt, cpu_addr, dma_addr, size, attrs)