NetBSD/share/man/man4/iop.4

.\"	$NetBSD: iop.4,v 1.7 2001/03/20 13:09:19 ad Exp $
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.\" Copyright (c) 2000 The NetBSD Foundation, Inc.
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.\" This code is derived from software contributed to The NetBSD Foundation
.\" by Andrew Doran.
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.Dd November 8, 2000
.Dt IOP 4
.Os
.Sh NAME
.Nm iop
.Nd
.Tn I2O adapter driver
.Sh SYNOPSIS
.Cd "iop* at pci? dev ? function ?"
.Cd "iopsp*" at iop? tid ?
.Cd "ld*" at iop? tid ?
.Cd options I2OVERBOSE
.Sh DESCRIPTION
The
.Nm
driver provides support for
.Tn PCI
I/O processors conforming to the
.Tn I2O
specification, revision 1.5 and above.
.Sh IOCTL INTERFACE
The following structures and constants are defined in
.Pa dev/i2o/iopio.h .
Note that the headers
.Pa sys/types.h ,
.Pa sys/device.h
and
.Pa dev/i2o/i2o.h
are prerequsites and must therefore be included beforehand.
.Bl -tag -width OTTF
.It Dv IOPIOCPT (struct ioppt)
Submit a message to the IOP and return the reply.  Note that the return
value of this ioctl is not affected by completion status as indicated by the
reply. 
.Bd -literal
struct ioppt {
	void	*pt_msg;	/* pointer to message buffer */
	size_t	pt_msglen;	/* message buffer size in bytes */
	void	*pt_reply;	/* pointer to reply buffer */
	size_t	pt_replylen;	/* reply buffer size in bytes */
	int	pt_timo;	/* completion timeout in ms */
	int	pt_nbufs;	/* number of transfers */
	struct	ioppt_buf pt_bufs[IOP_MAX_MSG_XFERS]; /* transfers */
};

struct ioppt_buf {
	void	*ptb_data;	/* pointer to buffer */
	size_t	ptb_datalen;	/* buffer size in bytes */
	int	ptb_out;	/* non-zero if transfer is to IOP */
};
.Ed
.Pp
The minimum timeout value that may be specified is 1000ms.  All other values
must not exceed the
.Nm
driver's operational limits.
.It Dv IOPIOCGSTATUS (struct iovec)
Request the latest available status record from the IOP.  This special-case
ioctl is provided as the I2O_EXEC_STATUS_GET message does not post replies,
and can therefore not be safely issued using the IOPIOCPT ioctl.
.El
.Pp
The following ioctls may block while attempting to acquire the
.Nm
driver's configuration lock, and may fail if the acquisition times out.
.Bl -tag -width OTTF
.It Dv IOPIOCGLCT (struct iovec)
Retreive the
.Nm
driver's copy of the logical configuration table.  This copy of the LCT
matches the current device configuration, but is not necessarily the latest
available version of the LCT.
.It Dv IOPIOCRECONFIG
Request that the
.Nm
driver scan all bus ports, retrieve the latest version of the LCT, and
attach or detach devices as necessary.  Note that higher-level
reconfiguration tasks (such as logically re-scanning SCSI busses) will not
be performed by this ioctl.
.It Dv IOPIOCGTIDMAP (struct iovec)
Retrieve the TID to device map.  This map indicates which targets are
configured, and what the corresponding device name for each is.  Although at
any given point it contains the same number of entries as the LCT, the number
of entries should be determined using the iov_len field from the returned
iovec.
.Bd -literal
struct iop_tidmap {
	u_short	it_tid;
	u_short	it_flags;
	char	it_dvname[sizeof(((struct device *)NULL)->dv_xname)];
};
#define	IT_CONFIGURED	0x02	/* target configured */
.Ed
.El
.Sh FILES
.Bl -tag -width /dev/iopn -compact
.It Pa /dev/iop Ns Ar u
control device for IOP unit
.Ar u
.El
.Sh SEE ALSO
.Xr intro 4 ,
.Xr iopsp 4 ,
.Xr ld 4 ,
.Xr iopctl 8
.Pp
http://www.intelligent-io.com/
.Sh AUTHOR
The
.Nm
driver was written by Andrew Doran
.Aq ad@netbsd.org .
.Sh HISTORY
The
.Nm
driver first appeared in
.Nx 1.6 .