NAME

tran_quiesce, tran_unquiesce - quiesce and unquiesce a SCSI bus

SYNOPSIS

#include <sys/scsi/scsi.h>
int prefixtran_quiesce(dev_info_t *hba_dip);

int prefixtran_unquiesce(dev_info_t *hba_dip);

INTERFACE LEVEL

illumos DDI

PARAMETERS

hba_dip

The dev_info_t pointer associated with the SCSI HBA.

DESCRIPTION

The tran_quiesce() and tran_unquiesce() vectors in the scsi_hba_tran(9S) structure should be initialized during the HBA driver's attach(9E). They are HBA entry points to be called when a user initiates quiesce and unquiesce operations through device control interfaces.

tran_quiesce() should wait for all outstanding commands to complete and blocks (or queues) any I/O requests issued. tran_unquiesce() should allow I/O activities to resume on the SCSI bus.

Implementation is hardware specific.

RETURN VALUES

tran_quiesce() and tran_unquiesce() should return:

Successful completion.

Non-zero

An error occurred.

ATTRIBUTES

See attributes(7) for a description of the following attributes:

ATTRIBUTE TYPE	ATTRIBUTE VALUE
Interface Stability	Committed