blk_queue_bounce_lim(9)
NAME
blk_queue_bounce_limit - set bounce buffer limit for queue
SYNOPSIS
void blk_queue_bounce_limit(struct request_queue * q, u64 dma_addr);
ARGUMENTS
- q
- the request queue for the device
- dma_addr
- bus address limit
DESCRIPTION
Different hardware can have different requirements as to what pages it
can do I/O directly to. A low level driver can call
blk_queue_bounce_limit to have lower memory pages allocated as bounce
buffers for doing I/O to pages residing above page.