scsi_transport(9F) Kernel Functions for Drivers scsi_transport(9F)
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
Solaris DDI specific (Solaris 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 initial-
ized 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
scsi_transport() returns:
TRAN_ACCEPT The packet was accepted by the transport layer.
TRAN_BUSY 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.
TRAN_BADPKT The DMA count in the packet exceeded the DMA engine's maximum DMA size.
TRAN_FATAL_ERROR A fatal error has occurred in the transport layer.
CONTEXT
scsi_transport() can be called from user or interrupt 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)
", status);
}
SEE ALSO
tran_start(9E), makecom(9F), scsi_init_pkt(9F), scsi_pktalloc(9F), scsi_poll(9F), scsi_pkt(9S)
Writing Device Drivers
SunOS 5.10 30 Aug 1995 scsi_transport(9F)
