1ATAPI_CHECK_DMA(9)           libata Core Internals          ATAPI_CHECK_DMA(9)
2
3
4

NAME

6       atapi_check_dma - Check whether ATAPI DMA can be supported
7

SYNOPSIS

9       int atapi_check_dma(struct ata_queued_cmd * qc);
10

ARGUMENTS

12       qc
13           Metadata associated with taskfile to check
14

DESCRIPTION

16       Allow low-level driver to filter ATA PACKET commands, returning a
17       status indicating whether or not it is OK to use DMA for the supplied
18       PACKET command.
19

LOCKING

21       spin_lock_irqsave(host lock)
22

RETURNS

24       0 when ATAPI DMA can be used nonzero otherwise
25

AUTHOR

27       Jeff Garzik
28           Author.
29
31Kernel Hackers Manual 2.6.       November 2011              ATAPI_CHECK_DMA(9)
Impressum