1DMA_BUF_END_CPU_ACCE(9)  Device drivers infrastructure DMA_BUF_END_CPU_ACCE(9)
2
3
4

NAME

6       dma_buf_end_cpu_access - Must be called after accessing a dma_buf from
7       the cpu in the kernel context. Calls end_cpu_access to allow
8       exporter-specific actions. Coherency is only guaranteed in the
9       specified range for the specified access direction.
10

SYNOPSIS

12       int dma_buf_end_cpu_access(struct dma_buf * dmabuf,
13                                  enum dma_data_direction direction);
14

ARGUMENTS

16       dmabuf
17           [in] buffer to complete cpu access for.
18
19       direction
20           [in] length of range for cpu access.
21

DESCRIPTION

23       This terminates CPU access started with dma_buf_begin_cpu_access.
24
25       Can return negative error values, returns 0 on success.
26

28Kernel Hackers Manual 3.10         June 2019           DMA_BUF_END_CPU_ACCE(9)
Impressum