ATA_EXEC_INTERNAL_SG

Section: libata Core Internals (9)
Updated: February 2011
Index Return to Main Contents

NAME

ata_exec_internal_sg - execute libata internal command

SYNOPSIS

unsigned ata_exec_internal_sg(struct ata_device * dev, struct ata_taskfile * tf, const u8 * cdb, int dma_dir, struct scatterlist * sgl, unsigned int n_elem, unsigned long timeout);

ARGUMENTS

dev

: Device to which the command is sent

: Taskfile registers for the command and the result

cdb

: CDB for packet command

dma_dir

: Data tranfer direction of the command

sgl

: sg list for the data buffer of the command

n_elem

: Number of sg entries

timeout

: Timeout in msecs (0 for default)

DESCRIPTION

Executes libata internal command with timeout. tf contains command on entry and result on return. Timeout and error conditions are reported via return value. No recovery action is taken after a command times out. It's caller's duty to clean up after timeout.

LOCKING

None. Should be called with kernel context, might sleep.

RETURNS

Zero on success, AC_ERR_* mask on failure

AUTHOR

Jeff Garzik

: Author.