Name
kfifo_dma_in_prepare —
setup a scatterlist for DMA input
Synopsis
kfifo_dma_in_prepare ( | fifo, |
| | sgl, |
| | nents, |
| | len); |
Arguments
fifo
address of the fifo to be used
sgl
pointer to the scatterlist array
nents
number of entries in the scatterlist array
len
number of elements to transfer
Description
This macro fills a scatterlist for DMA input.
It returns the number entries in the scatterlist array.
Note that with only one concurrent reader and one concurrent
writer, you don't need extra locking to use these macros.