Scroll to navigation

KFIFO_DMA_IN_PREPARE(9) FIFO Buffer KFIFO_DMA_IN_PREPARE(9)

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.

COPYRIGHT

January 2017 Kernel Hackers Manual 4.8.