dfs_null.c revision 222672 
1/*-
2 * Copyright (c) 2011 Adrian Chadd, Xenion Pty Ltd
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer,
10 *    without modification.
11 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
12 *    similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
13 *    redistribution must be conditioned upon including a substantially
14 *    similar Disclaimer requirement for further binary redistribution.
15 *
16 * NO WARRANTY
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
20 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
21 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
22 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
25 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
27 * THE POSSIBILITY OF SUCH DAMAGES.
28 *
29 * $FreeBSD: head/sys/dev/ath/ath_dfs/null/dfs_null.c 222672 2011-06-04 08:24:58Z adrian $
30 */
31#include <sys/cdefs.h>
32__FBSDID("$FreeBSD: head/sys/dev/ath/ath_dfs/null/dfs_null.c 222672 2011-06-04 08:24:58Z adrian $");
33
34/*
35 * This implements an empty DFS module.
36 */
37#include "opt_inet.h"
38#include "opt_wlan.h"
39
40#include <sys/param.h>
41#include <sys/systm.h>
42#include <sys/sysctl.h>
43#include <sys/kernel.h>
44#include <sys/lock.h>
45#include <sys/mutex.h>
46#include <sys/errno.h>
47
48#include <machine/bus.h>
49#include <machine/resource.h>
50#include <sys/bus.h>
51
52#include <sys/socket.h>
53
54#include <net/if.h>
55#include <net/if_media.h>
56#include <net/if_arp.h>
57#include <net/ethernet.h>		/* XXX for ether_sprintf */
58
59#include <net80211/ieee80211_var.h>
60
61#include <net/bpf.h>
62
63#ifdef INET
64#include <netinet/in.h>
65#include <netinet/if_ether.h>
66#endif
67
68#include <dev/ath/if_athvar.h>
69#include <dev/ath/if_athdfs.h>
70
71#include <dev/ath/ath_hal/ah_desc.h>
72
73/*
74 * Methods which are required
75 */
76
77/*
78 * Attach DFS to the given interface
79 */
80int
81ath_dfs_attach(struct ath_softc *sc)
82{
83	return 1;
84}
85
86/*
87 * Detach DFS from the given interface
88 */
89int
90ath_dfs_detach(struct ath_softc *sc)
91{
92	return 1;
93}
94
95/*
96 * Enable radar check
97 */
98void
99ath_dfs_radar_enable(struct ath_softc *sc, struct ieee80211_channel *chan)
100{
101	/* Check if the current channel is radar-enabled */
102	if (! IEEE80211_IS_CHAN_DFS(chan))
103		return;
104}
105
106/*
107 * Process DFS related PHY errors
108 */
109void
110ath_dfs_process_phy_err(struct ath_softc *sc, const char *buf,
111    uint64_t tsf, struct ath_rx_status *rxstat)
112{
113
114}
115
116/*
117 * Process the radar events and determine whether a DFS event has occured.
118 *
119 * This is designed to run outside of the RX processing path.
120 * The RX path will call ath_dfs_tasklet_needed() to see whether
121 * the task/callback running this routine needs to be called.
122 */
123int
124ath_dfs_process_radar_event(struct ath_softc *sc,
125    struct ieee80211_channel *chan)
126{
127	return 0;
128}
129
130/*
131 * Determine whether the the DFS check task needs to be queued.
132 *
133 * This is called in the RX task when the current batch of packets
134 * have been received. It will return whether there are any radar
135 * events for ath_dfs_process_radar_event() to handle.
136 */
137int
138ath_dfs_tasklet_needed(struct ath_softc *sc, struct ieee80211_channel *chan)
139{
140	return 0;
141}
142
143/*
144 * Handle ioctl requests from the diagnostic interface
145 */
146int
147ath_ioctl_phyerr(struct ath_softc *sc, struct ath_diag *ad)
148{
149	return 1;
150}
151
152/*
153 * Get the current DFS thresholds from the HAL
154 */
155int
156ath_dfs_get_thresholds(struct ath_softc *sc, HAL_PHYERR_PARAM *param)
157{
158	ath_hal_getdfsthresh(sc->sc_ah, param);
159	return 1;
160}
161