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Copyright (c) 2006, 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.
When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE. If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
TRAN_BUSY
TRAN_BADPKT
TRAN_FATAL_ERROR
Copyright (c) 2006, 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.
When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE. If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
SCSI_TRANSPORT 9F "Jan 16, 2006"
NAME
scsi_transport - request by a SCSI target driver to start a command
SYNOPSIS
#include <sys/scsi/scsi.h> int scsi_transport(struct scsi_pkt *pkt);
INTERFACE LEVEL
illumos DDI specific (illumos DDI).
PARAMETERS
pkt
Pointer to a scsi_pkt(9S) structure.
DESCRIPTION
Target drivers use scsi_transport() to request the host adapter driver to
transport a command to the SCSI target device specified by pkt. The
target driver must obtain resources for the packet using
scsi_init_pkt(9F) prior to calling this function. The packet may be
initialized using one of the makecom(9F) functions.
scsi_transport() does not wait for the SCSI command to complete.
See scsi_poll(9F) for a description of polled SCSI commands. Upon
completion of the SCSI command the host adapter calls the completion
routine provided by the target driver in the pkt_comp member of the
scsi_pkt pointed to by pkt.
RETURN VALUES
The scsi_transport() function returns:
TRAN_ACCEPT
The packet was accepted by the transport layer.
The packet could not be accepted because there was already a packet in progress for this target/lun, the host adapter queue was full, or the target device queue was full.
The DMA count in the packet exceeded the DMA engine's maximum DMA size.
A fatal error has occurred in the transport layer.
CONTEXT
The scsi_transport() function can be called from user, interrupt, or
kernel context.
EXAMPLES
Example 1 Using scsi_transport()
if ((status = scsi_transport(rqpkt)) != TRAN_ACCEPT) {
scsi_log(devp, sd_label, CE_WARN,
"transport of request sense pkt fails (0x%x)\en", status);
}
SEE ALSO
tran_start (9E), makecom (9F), scsi_init_pkt (9F), scsi_pktalloc (9F), scsi_poll (9F), scsi_pkt (9S) Writing Device Drivers