105 lines
3.0 KiB
Groff
105 lines
3.0 KiB
Groff
|
.\" -*- nroff -*-
|
||
|
|
.\"
|
||
|
|
.\" Copyright (c) 2000 Alexander Langer
|
||
|
|
.\"
|
||
|
|
.\" All rights reserved.
|
||
|
|
.\"
|
||
|
|
.\" This program is free software.
|
||
|
|
.\"
|
||
|
|
.\" Redistribution and use in source and binary forms, with or without
|
||
|
|
.\" modification, are permitted provided that the following conditions
|
||
|
|
.\" are met:
|
||
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
||
|
|
.\" notice, this list of conditions and the following disclaimer.
|
||
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
||
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
||
|
|
.\" documentation and/or other materials provided with the distribution.
|
||
|
|
.\"
|
||
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR
|
||
|
|
.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||
|
|
.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
||
|
|
.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||
|
|
.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
||
|
|
.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||
|
|
.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||
|
|
.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||
|
|
.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
||
|
|
.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||
|
|
.\"
|
||
|
|
.\" $FreeBSD$
|
||
|
|
.\"
|
||
|
|
.Dd May 18, 2000
|
||
|
|
.Dt BUS_RELEASE_RESOURCE 9
|
||
|
|
.Os FreeBSD
|
||
|
|
.Sh NAME
|
||
|
|
.Nm bus_release_resource
|
||
|
|
.Nd release resources on a bus
|
||
|
|
.Sh SYNOPSIS
|
||
|
|
.Fd #include <sys/param.h>
|
||
|
|
.Fd #include <sys/bus.h>
|
||
|
|
.Fd #include <sys/rman.h>
|
||
|
|
.Fd #include <sys/resource.h>
|
||
|
|
.Ft int
|
||
|
|
.Fn bus_release_resource "device_t dev" "int type" "int rid" "struct resource *r"
|
||
|
|
.Sh DESCRIPTION
|
||
|
|
Free a resource allocated by
|
||
|
|
.Xr bus_alloc_resource 9 .
|
||
|
|
The resource must not be in use on release, i.e. call an appropriate function
|
||
|
|
before (e.g.
|
||
|
|
.Xr bus_teardown_intr 9
|
||
|
|
for IRQs).
|
||
|
|
.Bl -item
|
||
|
|
.It
|
||
|
|
.Fa dev
|
||
|
|
is the device that owns the resource.
|
||
|
|
.It
|
||
|
|
.Fa type
|
||
|
|
is the type of resource that is released.
|
||
|
|
It must be of the same type you allocated it as before.
|
||
|
|
See
|
||
|
|
.Xr bus_alloc_resource 9
|
||
|
|
for valid types.
|
||
|
|
.It
|
||
|
|
.Fa rid
|
||
|
|
is the resource ID of the resource.
|
||
|
|
The
|
||
|
|
.Fa rid
|
||
|
|
value must be the same as the one returned by
|
||
|
|
.Xr bus_alloc_resource 9 .
|
||
|
|
.It
|
||
|
|
.Fa r
|
||
|
|
is the pointer to
|
||
|
|
.Va struct res ,
|
||
|
|
i.e. the resource itself,
|
||
|
|
returned by
|
||
|
|
.Xr bus_alloc_resource 9 .
|
||
|
|
.El
|
||
|
|
.Sh RETURN VALUES
|
||
|
|
.Er EINVAL
|
||
|
|
is returned, if the device
|
||
|
|
.Fa dev
|
||
|
|
has no parent,
|
||
|
|
.Dv 0
|
||
|
|
otherwise.
|
||
|
|
The kernel will panic, if it can't release the resource.
|
||
|
|
.Sh EXAMPLES
|
||
|
|
.Bd -literal
|
||
|
|
/* deactivate IRQ */
|
||
|
|
bus_teardown_intr(dev, foosoftc->irqres, foosoftc->irqid);
|
||
|
|
|
||
|
|
/* release IRQ resource */
|
||
|
|
bus_release_resource(dev, SYS_RES_IRQ, foosoftc->irqid,
|
||
|
|
foosoftc->irqres);
|
||
|
|
|
||
|
|
/* release I/O port resource */
|
||
|
|
bus_release_resource(dev, SYS_RES_IOPORT, foosoftc->portid,
|
||
|
|
foosoftc->portres);
|
||
|
|
.Ed
|
||
|
|
.Sh SEE ALSO
|
||
|
|
.Xr driver 9 ,
|
||
|
|
.Xr device 9 ,
|
||
|
|
.Xr bus_alloc_resource 9
|
||
|
|
.Sh AUTHORS
|
||
|
|
This man page was written by
|
||
|
|
.An Alexander Langer Aq alex@big.endian.de .
|