TRAN_QUIESCE(9E) Driver Entry Points TRAN_QUIESCE(9E)

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:

0
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 |
+--------------------+-----------------+

SEE ALSO


attributes(7), tran_bus_reset(9E), scsi_hba_tran(9S)

illumos January 31, 1999 TRAN_QUIESCE(9E)