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);

ARGUMENTS

pkt Pointer to a scsi_pkt(9S) structure.

INTERFACE LEVEL

Solaris architecture specific (SunDDI).

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

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.

CONTEXT

scsi_transport() can be called from user or interrupt context.

EXAMPLE

    if ((status = scsi_transport(rqpkt)) != TRAN_ACCEPT) {
            scsi_log(devp, sd_label, CE_WARN,
                "transport of request sense pkt fails (%x)0, status);
    }

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