1 .\" Copyright (c) 2000 Jeroen Ruigrok van der Werven
2 .\" All rights reserved.
4 .\" Redistribution and use in source and binary forms, with or without
5 .\" modification, are permitted provided that the following conditions
7 .\" 1. Redistributions of source code must retain the above copyright
8 .\" notice, this list of conditions and the following disclaimer.
9 .\" 2. Redistributions in binary form must reproduce the above copyright
10 .\" notice, this list of conditions and the following disclaimer in the
11 .\" documentation and/or other materials provided with the distribution.
13 .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 .\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 .Nm BUS_TEARDOWN_INTR ,
35 .Nd create, attach and teardown an interrupt handler
41 .Fa "device_t dev" "device_t child" "struct resource *irq" "int flags"
42 .Fa "driver_filter_t *filter" "driver_intr_t *ithread" "void *arg"
47 .Fa "device_t dev" "struct resource *r" "int flags"
48 .Fa "driver_filter_t filter" "driver_intr_t ithread" "void *arg"
53 .Fa "device_t dev" "device_t child" "struct resource *irq" "void *cookiep"
56 .Fn bus_teardown_intr "device_t dev" "struct resource *r" "void *cookiep"
61 will create and attach an interrupt handler to an interrupt
62 previously allocated by the resource manager's
63 .Xr BUS_ALLOC_RESOURCE 9
69 and give the broad category of interrupt.
72 also tell the interrupt handlers about certain
73 device driver characteristics.
75 marks the handler as being
76 an exclusive handler for this interrupt.
78 tells the scheduler that the interrupt handler
79 is well behaved in a preemptive environment
82 to be protected by the ``Giant Lock'' mutex.
84 marks the interrupt as being a good source of entropy -
85 this may be used by the entropy device
88 To define a time-critical handler (previously known as
90 that will not execute any potentially blocking operation, use the
97 will be called with the value
103 argument is a pointer to a
107 will write a cookie for the parent bus' use to if it is successful in
108 establishing an interrupt.
109 Driver writers may assume that this cookie will be non-zero.
110 The nexus driver will write 0 on failure to
113 The interrupt handler will be detached by
114 .Fn BUS_TEARDOWN_INTR .
115 The cookie needs to be passed to
116 .Fn BUS_TEARDOWN_INTR
117 in order to tear down the correct interrupt handler.
119 .Fn BUS_TEARDOWN_INTR
120 returns, it is guaranteed that the interrupt function is not active and
121 will no longer be called.
123 Mutexes are not allowed to be held across calls to these functions.
125 Zero is returned on success,
126 otherwise an appropriate error is returned.
133 This manual page was written by
134 .An Jeroen Ruigrok van der Werven
135 .Aq asmodai@FreeBSD.org
136 based on the manual pages for
142 .Aq dfr@FreeBSD.org .