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ATA_EXEC_INTERNAL_SG(9) libata Core Internals ATA_EXEC_INTERNAL_SG(9)

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 transfer 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.

RETURN

Zero on success, AC_ERR_* mask on failure

AUTHOR

Jeff Garzik

Author.

COPYRIGHT

January 2017 Kernel Hackers Manual 4.8.