ata_exec_internal

ata_exec_internal_sg
Prev	Chapter 5. libata Core Internals	Next

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
tf: 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