SCSI_SLAVE(9F)SCSI_SLAVE(9F)NAMEscsi_slave - utility for SCSI target drivers to establish the presence
of a target
SYNOPSIS
#include <sys/scsi/scsi.h>
int scsi_slave(struct scsi_device *devp, int (*callback)(void));
INTERFACE LEVEL
The scsi_slave() function is obsolete. This function has been replaced
by scsi_probe(9F).
PARAMETERS
devp
Pointer to a scsi_device(9S) structure.
callback
Pointer to a callback function, NULL_FUNC or SLEEP_FUNC.
DESCRIPTIONscsi_slave() checks for the presence of a SCSI device. Target drivers
may use this function in their probe(9E) routines. scsi_slave() deter‐
mines if the device is present by using a Test Unit Ready command fol‐
lowed by an Inquiry command. If scsi_slave() is successful, it will
fill in the scsi_inquiry structure, which is the sd_inq member of the
scsi_device(9S) structure, and return SCSI_PROBE_EXISTS. This informa‐
tion can be used to determine if the target driver has probed the cor‐
rect SCSI device type. callback indicates what the allocator routines
should do when DMA resources are not available:
NULL_FUNC
Do not wait for resources. Return a NULL pointer.
SLEEP_FUNC
Wait indefinitely for resources.
Other Values
callback points to a function which is called when
resources may have become available. callback must
return either 0 (indicating that it attempted to allo‐
cate resources but again failed to do so), in which
case it is put back on a list to be called again later,
or 1 indicating either success in allocating resources
or indicating that it no longer cares for a retry.
RETURN VALUESscsi_slave() returns:
SCSIPROBE_NOMEM
No space available for structures.
SCSIPROBE_EXISTS
Device exists and inquiry data is valid.
SCSIPROBE_NONCCS
Device exists but inquiry data is not valid.
SCSIPROBE_FAILURE
Polled command failure.
SCSIPROBE_NORESP
No response to TEST UNIT READY.
CONTEXTscsi_slave() 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.
ATTRIBUTES
See attributes(5) for a description of the following attributes:
┌────────────────┬─────────────────┐
│ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├────────────────┼─────────────────┤
│Stability Level │ Obsolete │
└────────────────┴─────────────────┘
SEE ALSOattributes(5), attach(9E), probe(9E), ddi_iopb_alloc(9F), makecom(9F),
scsi_dmaget(9F), scsi_ifgetcap(9F), scsi_pktalloc(9F), scsi_poll(9F),
scsi_probe(9F), scsi_device(9S)
ANSI Small Computer System Interface-2 (SCSI-2)
Writing Device Drivers
NOTES
The scsi_slave() function is obsolete and will be discontinued in a
future release. This function has been replaced by scsi_probe(9F).
Sep 27, 2002 SCSI_SLAVE(9F)
