man/man9f/scsi_slave.9f

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 SCSI_SLAVE 9F "Sep 27, 2002"
 NAME
scsi_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The scsi_slave() function is obsolete. This function has been replaced by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.


 DESCRIPTION

scsi_slave() checks for the presence of a SCSI device. Target
drivers may use this function in their probe(9E) routines.
scsi_slave() determines if the device is present by using a Test Unit
Ready command followed 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 information can be used to determine if the
target driver has probed the correct 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 allocate 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 VALUES

scsi_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.


 CONTEXT

scsi_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
allocated.
 ATTRIBUTES

See attributes(5) for a description of the following attributes:


ATTRIBUTE TYPE ATTRIBUTE VALUE
Stability Level Obsolete


 SEE ALSO

attributes(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).