man/man9f/scsi_transport.9f

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 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

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
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.


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

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