'\" te
.\"  Copyright (c) 1996 Sun Microsystems, Inc.  All Rights Reserved.
.\" The contents of this file are subject to the terms of the Common Development and Distribution License (the "License").  You may not use this file except in compliance with the License.
.\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing.  See the License for the specific language governing permissions and limitations under the License.
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.TH tran_bus_reset 9E "17 Mar 1999" "SunOS 5.11" "Driver Entry Points"
.SH NAME
tran_bus_reset \- reset a SCSI bus
.SH SYNOPSIS
.LP
.nf
#include <sys/scsi/scsi.h> int \fIprefix\fR

\fB\fR\fBtran_bus_reset\fR(\fBdev_info_t\fR \fI*hba_dip\fR, \fBint\fR \fIlevel\fR);
.fi

.SH INTERFACE LEVEL
.sp
.LP
Solaris DDI
.SH PARAMETERS
.sp
.ne 2
.mk
.na
\fB\fIhba_dip\fR\fR
.ad
.RS 11n
.rt  
The  \fBdev_info_t\fR pointer associated with the SCSI HBA.
.RE

.sp
.ne 2
.mk
.na
\fB\fIlevel\fR\fR
.ad
.RS 11n
.rt  
The level of reset required.
.RE

.SH DESCRIPTION
.sp
.LP
The  \fBtran_bus_reset()\fR vector in the \fBscsi_hba_tran\fR(9S) structure
should be initialized during the HBA driver's \fBattach\fR(9E). It is an HBA
entry point to be called when a user initiates a bus reset through device
control interfaces.
.sp
.LP
\fBtran_bus_reset()\fR must reset the SCSI bus without resetting targets.
.sp
.LP
\fIlevel\fR will be one of the following:
.sp
.ne 2
.mk
.na
\fB\fBRESET_BUS\fR\fR
.ad
.RS 13n
.rt  
Reset the SCSI bus only, not the targets.
.RE

.sp
.LP
Implementation is hardware specific. If it is not possible to reset the SCSI
bus without changing the state and operating mode of the targets, the HBA
driver should not initialize this vector or return failure.
.SH RETURN VALUES
.sp
.LP
\fBtran_bus_reset()\fR should return:
.sp
.ne 2
.mk
.na
\fB\fB1\fR\fR
.ad
.RS 5n
.rt  
on success.
.RE

.sp
.ne 2
.mk
.na
\fB\fB0\fR\fR
.ad
.RS 5n
.rt  
on failure.
.RE

.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(5) for a description of the following attributes:
.sp

.sp
.TS
tab() box;
cw(2.75i) |cw(2.75i) 
lw(2.75i) |lw(2.75i) 
.
ATTRIBUTE TYPEATTRIBUTE VALUE
_
Interface StabilityCommitted
.TE

.SH SEE ALSO
.sp
.LP
\fBattributes\fR(5), \fBtran_quiesce\fR(9E), \fBscsi_hba_tran\fR(9S)