SCSI_PROBE(9F)SCSI_PROBE(9F)NAMEscsi_probe - utility for probing a scsi device
SYNOPSIS
#include <sys/scsi/scsi.h>
int scsi_probe(struct scsi_device *devp, int (*waitfunc);
INTERFACE LEVEL
Solaris DDI specific (Solaris DDI).
PARAMETERS
devp
Pointer to a scsi_device(9S) structure
waitfunc
NULL_FUNC or SLEEP_FUNC
DESCRIPTIONscsi_probe() determines whether a target/lun is present and sets up the
scsi_device structure with inquiry data.
scsi_probe() uses the SCSI Inquiry command to test if the device
exists. It can retry the Inquiry command as appropriate. If
scsi_probe() is successful, it will allocate space for the scsi_inquiry
structure and assign the address to the sd_inq member of the
scsi_device(9S) structure. scsi_probe() will then fill in this
scsi_inquiry(9S) structure and return SCSIPROBE_EXISTS. If scsi_probe()
is unsuccessful, it returns SCSIPROBE_NOMEM in spite of callback set to
SLEEP_FUNC.
scsi_unprobe(9F) is used to undo the effect of scsi_probe().
If the target is a non-CCS device, SCSIPROBE_NONCCS will be returned.
waitfunc indicates what the allocator routines should do when resources
are not available; the valid values are:
NULL_FUNC
Do not wait for resources. Return SCSIPROBE_NOMEM or
SCSIPROBE_FAILURE
SLEEP_FUNC
Wait indefinitely for resources.
RETURN VALUESscsi_probe() returns:
SCSIPROBE_BUSY
Device exists but is currently busy.
SCSIPROBE_EXISTS
Device exists and inquiry data is valid.
SCSIPROBE_FAILURE
Polled command failure.
SCSIPROBE_NOMEM
No space available for structures.
SCSIPROBE_NOMEM_CB
No space available for structures but callback
request has been queued.
SCSIPROBE_NONCCS
Device exists but inquiry data is not valid.
SCSIPROBE_NORESP
Device does not respond to an INQUIRY.
CONTEXTscsi_probe() is normally called from the target driver's probe(9E) or
attach(9E) routine. In any case, this routine should not be called from
interrupt context, because it can sleep waiting for memory to be allo‐
cated.
EXAMPLES
Example 1 Using scsi_probe()
switch (scsi_probe(devp, NULL_FUNC)) {
default:
case SCSIPROBE_NORESP:
case SCSIPROBE_NONCCS:
case SCSIPROBE_NOMEM:
case SCSIPROBE_FAILURE:
case SCSIPROBE_BUSY:
break;
case SCSIPROBE_EXISTS:
switch (devp->sd_inq->inq_dtype) {
case DTYPE_DIRECT:
rval = DDI_PROBE_SUCCESS;
break;
case DTYPE_RODIRECT:
rval = DDI_PROBE_SUCCESS;
break;
case DTYPE_NOTPRESENT:
default:
break;
}
}
scsi_unprobe(devp);
SEE ALSOattach(9E), probe(9E), scsi_slave(9F), scsi_unprobe(9F),
scsi_unslave(9F), scsi_device(9S), scsi_inquiry(9S)
ANSI Small Computer System Interface-2 (SCSI-2)
Writing Device Drivers
NOTES
A waitfunc function other than NULL_FUNC or SLEEP_FUNC is not supported
and may have unexpected results.
Feb 26, 2002 SCSI_PROBE(9F)
