Name
blk_queue_bounce_limit —
set bounce buffer limit for queue
Synopsis
void blk_queue_bounce_limit ( | struct request_queue * q, |
| | u64 dma_mask); |
Arguments
q
the request queue for the device
dma_mask
the maximum address the device can handle
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 dma_mask.