summaryrefslogtreecommitdiff
path: root/include/net/regulatory.h
blob: dad7ab20a8cb204f08b2ecda724d5c1db5138ec8 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
#ifndef __NET_REGULATORY_H
#define __NET_REGULATORY_H
/*
 * regulatory support structures
 *
 * Copyright 2008-2009	Luis R. Rodriguez <mcgrof@qca.qualcomm.com>
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <linux/rcupdate.h>

/**
 * enum environment_cap - Environment parsed from country IE
 * @ENVIRON_ANY: indicates country IE applies to both indoor and
 *	outdoor operation.
 * @ENVIRON_INDOOR: indicates country IE applies only to indoor operation
 * @ENVIRON_OUTDOOR: indicates country IE applies only to outdoor operation
 */
enum environment_cap {
	ENVIRON_ANY,
	ENVIRON_INDOOR,
	ENVIRON_OUTDOOR,
};

/**
 * struct regulatory_request - used to keep track of regulatory requests
 *
 * @rcu_head: RCU head struct used to free the request
 * @wiphy_idx: this is set if this request's initiator is
 *	%REGDOM_SET_BY_COUNTRY_IE or %REGDOM_SET_BY_DRIVER. This
 *	can be used by the wireless core to deal with conflicts
 *	and potentially inform users of which devices specifically
 *	cased the conflicts.
 * @initiator: indicates who sent this request, could be any of
 *	of those set in nl80211_reg_initiator (%NL80211_REGDOM_SET_BY_*)
 * @alpha2: the ISO / IEC 3166 alpha2 country code of the requested
 *	regulatory domain. We have a few special codes:
 *	00 - World regulatory domain
 *	99 - built by driver but a specific alpha2 cannot be determined
 *	98 - result of an intersection between two regulatory domains
 *	97 - regulatory domain has not yet been configured
 * @dfs_region: If CRDA responded with a regulatory domain that requires
 *	DFS master operation on a known DFS region (NL80211_DFS_*),
 *	dfs_region represents that region. Drivers can use this and the
 *	@alpha2 to adjust their device's DFS parameters as required.
 * @user_reg_hint_type: if the @initiator was of type
 *	%NL80211_REGDOM_SET_BY_USER, this classifies the type
 *	of hint passed. This could be any of the %NL80211_USER_REG_HINT_*
 *	types.
 * @intersect: indicates whether the wireless core should intersect
 *	the requested regulatory domain with the presently set regulatory
 *	domain.
 * @processed: indicates whether or not this requests has already been
 *	processed. When the last request is processed it means that the
 *	currently regulatory domain set on cfg80211 is updated from
 *	CRDA and can be used by other regulatory requests. When a
 *	the last request is not yet processed we must yield until it
 *	is processed before processing any new requests.
 * @country_ie_checksum: checksum of the last processed and accepted
 *	country IE
 * @country_ie_env: lets us know if the AP is telling us we are outdoor,
 *	indoor, or if it doesn't matter
 * @list: used to insert into the reg_requests_list linked list
 */
struct regulatory_request {
	struct rcu_head rcu_head;
	int wiphy_idx;
	enum nl80211_reg_initiator initiator;
	enum nl80211_user_reg_hint_type user_reg_hint_type;
	char alpha2[2];
	enum nl80211_dfs_regions dfs_region;
	bool intersect;
	bool processed;
	enum environment_cap country_ie_env;
	struct list_head list;
};

/**
 * enum ieee80211_regulatory_flags - device regulatory flags
 *
 * @REGULATORY_CUSTOM_REG: tells us the driver for this device
 *	has its own custom regulatory domain and cannot identify the
 *	ISO / IEC 3166 alpha2 it belongs to. When this is enabled
 *	we will disregard the first regulatory hint (when the
 *	initiator is %REGDOM_SET_BY_CORE). Drivers that use
 *	wiphy_apply_custom_regulatory() should have this flag set
 *	or the regulatory core will set it for the wiphy.
 *	If you use regulatory_hint() *after* using
 *	wiphy_apply_custom_regulatory() the wireless core will
 *	clear the REGULATORY_CUSTOM_REG for your wiphy as it would be
 *	implied that the device somehow gained knowledge of its region.
 * @REGULATORY_STRICT_REG: tells us that the wiphy for this device
 *	has regulatory domain that it wishes to be considered as the
 *	superset for regulatory rules. After this device gets its regulatory
 *	domain programmed further regulatory hints shall only be considered
 *	for this device to enhance regulatory compliance, forcing the
 *	device to only possibly use subsets of the original regulatory
 *	rules. For example if channel 13 and 14 are disabled by this
 *	device's regulatory domain no user specified regulatory hint which
 *	has these channels enabled would enable them for this wiphy,
 *	the device's original regulatory domain will be trusted as the
 *	base. You can program the superset of regulatory rules for this
 *	wiphy with regulatory_hint() for cards programmed with an
 *	ISO3166-alpha2 country code. wiphys that use regulatory_hint()
 *	will have their wiphy->regd programmed once the regulatory
 *	domain is set, and all other regulatory hints will be ignored
 *	until their own regulatory domain gets programmed.
 * @REGULATORY_DISABLE_BEACON_HINTS: enable this if your driver needs to
 *	ensure that passive scan flags and beaconing flags may not be lifted by
 *	cfg80211 due to regulatory beacon hints. For more information on beacon
 *	hints read the documenation for regulatory_hint_found_beacon()
 * @REGULATORY_COUNTRY_IE_FOLLOW_POWER:  for devices that have a preference
 *	that even though they may have programmed their own custom power
 *	setting prior to wiphy registration, they want to ensure their channel
 *	power settings are updated for this connection with the power settings
 *	derived from the regulatory domain. The regulatory domain used will be
 *	based on the ISO3166-alpha2 from country IE provided through
 *	regulatory_hint_country_ie()
 * @REGULATORY_COUNTRY_IE_IGNORE: for devices that have a preference to ignore
 * 	all country IE information processed by the regulatory core. This will
 * 	override %REGULATORY_COUNTRY_IE_FOLLOW_POWER as all country IEs will
 * 	be ignored.
 * @REGULATORY_ENABLE_RELAX_NO_IR: for devices that wish to allow the
 *      NO_IR relaxation, which enables transmissions on channels on which
 *      otherwise initiating radiation is not allowed. This will enable the
 *      relaxations enabled under the CFG80211_REG_RELAX_NO_IR configuration
 *      option
 */
enum ieee80211_regulatory_flags {
	REGULATORY_CUSTOM_REG			= BIT(0),
	REGULATORY_STRICT_REG			= BIT(1),
	REGULATORY_DISABLE_BEACON_HINTS		= BIT(2),
	REGULATORY_COUNTRY_IE_FOLLOW_POWER	= BIT(3),
	REGULATORY_COUNTRY_IE_IGNORE		= BIT(4),
	REGULATORY_ENABLE_RELAX_NO_IR           = BIT(5),
};

struct ieee80211_freq_range {
	u32 start_freq_khz;
	u32 end_freq_khz;
	u32 max_bandwidth_khz;
};

struct ieee80211_power_rule {
	u32 max_antenna_gain;
	u32 max_eirp;
};

struct ieee80211_reg_rule {
	struct ieee80211_freq_range freq_range;
	struct ieee80211_power_rule power_rule;
	u32 flags;
	u32 dfs_cac_ms;
};

struct ieee80211_regdomain {
	struct rcu_head rcu_head;
	u32 n_reg_rules;
	char alpha2[3];
	enum nl80211_dfs_regions dfs_region;
	struct ieee80211_reg_rule reg_rules[];
};

#define MHZ_TO_KHZ(freq) ((freq) * 1000)
#define KHZ_TO_MHZ(freq) ((freq) / 1000)
#define DBI_TO_MBI(gain) ((gain) * 100)
#define MBI_TO_DBI(gain) ((gain) / 100)
#define DBM_TO_MBM(gain) ((gain) * 100)
#define MBM_TO_DBM(gain) ((gain) / 100)

#define REG_RULE_EXT(start, end, bw, gain, eirp, dfs_cac, reg_flags)	\
{									\
	.freq_range.start_freq_khz = MHZ_TO_KHZ(start),			\
	.freq_range.end_freq_khz = MHZ_TO_KHZ(end),			\
	.freq_range.max_bandwidth_khz = MHZ_TO_KHZ(bw),			\
	.power_rule.max_antenna_gain = DBI_TO_MBI(gain),		\
	.power_rule.max_eirp = DBM_TO_MBM(eirp),			\
	.flags = reg_flags,						\
	.dfs_cac_ms = dfs_cac,						\
}

#define REG_RULE(start, end, bw, gain, eirp, reg_flags) \
	REG_RULE_EXT(start, end, bw, gain, eirp, 0, reg_flags)

#endif