SCSI_RESET_NOTIFY(9F) Kernel Functions for Drivers SCSI_RESET_NOTIFY(9F)

NAME

scsi_reset_notify - notify target driver of bus resets

SYNOPSIS

#include <sys/scsi/scsi.h>


void scsi_reset_notify(struct scsi_address *ap, int flag,
void (*callback)(caddr_t), caddr_t arg);

INTERFACE LEVEL

illumos DDI specific (illumos DDI).

PARAMETERS

ap
Pointer to the scsi_address structure.


flag
A flag indicating registration or cancellation of the
notification request.


callback
A pointer to the target driver's reset notification function.


arg
The callback function argument.

DESCRIPTION

The scsi_reset_notify() function is used by a target driver when it needs
to be notified of a bus reset. The bus reset could be issued by the
transport layer (e.g. the host bus adapter (HBA) driver or controller) or
by another initiator.


The argument flag is used to register or cancel the notification. The
supported values for flag are as follows:

SCSI_RESET_NOTIFY
Register callback as the reset notification function
for the target driver.


SCSI_RESET_CANCEL
Cancel the reset notification request.


Target drivers can find out whether the HBA driver and controller support
reset notification by checking the reset-notification capability using
the scsi_ifgetcap(9F) function.

RETURN VALUES

If flag is SCSI_RESET_NOTIFY, scsi_reset_notify() returns:

DDI_SUCCESS
The notification request has been accepted.


DDI_FAILURE
The transport layer does not support reset notification or
could not accept this request.


If flag is SCSI_RESET_CANCEL, scsi_reset_notify() returns:

DDI_SUCCESS
The notification request has been canceled.


DDI_FAILURE
No notification request was registered.

CONTEXT

The scsi_reset_notify() function can be called from user, interrupt, or
kernel context.

SEE ALSO

scsi_ifgetcap(9F), scsi_address(9S)


Writing Device Drivers


January 16, 2006 SCSI_RESET_NOTIFY(9F)