1
2 #ifndef __NET_REGULATORY_H
3 #define __NET_REGULATORY_H
4 /*
5 * regulatory support structures
6 *
7 * Copyright 2008-2009 Luis R. Rodriguez <mcgrof@qca.qualcomm.com>
8 * Copyright (C) 2018 Intel Corporation
9 *
10 * Permission to use, copy, modify, and/or distribute this software for any
11 * purpose with or without fee is hereby granted, provided that the above
12 * copyright notice and this permission notice appear in all copies.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
15 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
16 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
17 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
18 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
19 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
20 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
21 */
22
23 #include <linux/ieee80211.h>
24 #include <linux/nl80211.h>
25 #include <linux/rcupdate.h>
26
27 /**
28 * enum environment_cap - Environment parsed from country IE
29 * @ENVIRON_ANY: indicates country IE applies to both indoor and
30 * outdoor operation.
31 * @ENVIRON_INDOOR: indicates country IE applies only to indoor operation
32 * @ENVIRON_OUTDOOR: indicates country IE applies only to outdoor operation
33 */
34 enum environment_cap {
35 ENVIRON_ANY,
36 ENVIRON_INDOOR,
37 ENVIRON_OUTDOOR,
38 };
39
40 /**
41 * struct regulatory_request - used to keep track of regulatory requests
42 *
43 * @rcu_head: RCU head struct used to free the request
44 * @wiphy_idx: this is set if this request's initiator is
45 * %REGDOM_SET_BY_COUNTRY_IE or %REGDOM_SET_BY_DRIVER. This
46 * can be used by the wireless core to deal with conflicts
47 * and potentially inform users of which devices specifically
48 * cased the conflicts.
49 * @initiator: indicates who sent this request, could be any of
50 * those set in nl80211_reg_initiator (%NL80211_REGDOM_SET_BY_*)
51 * @alpha2: the ISO / IEC 3166 alpha2 country code of the requested
52 * regulatory domain. We have a few special codes:
53 * 00 - World regulatory domain
54 * 99 - built by driver but a specific alpha2 cannot be determined
55 * 98 - result of an intersection between two regulatory domains
56 * 97 - regulatory domain has not yet been configured
57 * @dfs_region: If CRDA responded with a regulatory domain that requires
58 * DFS master operation on a known DFS region (NL80211_DFS_*),
59 * dfs_region represents that region. Drivers can use this and the
60 * @alpha2 to adjust their device's DFS parameters as required.
61 * @user_reg_hint_type: if the @initiator was of type
62 * %NL80211_REGDOM_SET_BY_USER, this classifies the type
63 * of hint passed. This could be any of the %NL80211_USER_REG_HINT_*
64 * types.
65 * @intersect: indicates whether the wireless core should intersect
66 * the requested regulatory domain with the presently set regulatory
67 * domain.
68 * @processed: indicates whether or not this requests has already been
69 * processed. When the last request is processed it means that the
70 * currently regulatory domain set on cfg80211 is updated from
71 * CRDA and can be used by other regulatory requests. When a
72 * the last request is not yet processed we must yield until it
73 * is processed before processing any new requests.
74 * @country_ie_env: lets us know if the AP is telling us we are outdoor,
75 * indoor, or if it doesn't matter
76 * @list: used to insert into the reg_requests_list linked list
77 */
78 struct regulatory_request {
79 struct rcu_head rcu_head;
80 int wiphy_idx;
81 enum nl80211_reg_initiator initiator;
82 enum nl80211_user_reg_hint_type user_reg_hint_type;
83 char alpha2[3];
84 enum nl80211_dfs_regions dfs_region;
85 bool intersect;
86 bool processed;
87 enum environment_cap country_ie_env;
88 struct list_head list;
89 };
90
91 /**
92 * enum ieee80211_regulatory_flags - device regulatory flags
93 *
94 * @REGULATORY_CUSTOM_REG: tells us the driver for this device
95 * has its own custom regulatory domain and cannot identify the
96 * ISO / IEC 3166 alpha2 it belongs to. When this is enabled
97 * we will disregard the first regulatory hint (when the
98 * initiator is %REGDOM_SET_BY_CORE). Drivers that use
99 * wiphy_apply_custom_regulatory() should have this flag set
100 * or the regulatory core will set it for the wiphy.
101 * If you use regulatory_hint() *after* using
102 * wiphy_apply_custom_regulatory() the wireless core will
103 * clear the REGULATORY_CUSTOM_REG for your wiphy as it would be
104 * implied that the device somehow gained knowledge of its region.
105 * @REGULATORY_STRICT_REG: tells us that the wiphy for this device
106 * has regulatory domain that it wishes to be considered as the
107 * superset for regulatory rules. After this device gets its regulatory
108 * domain programmed further regulatory hints shall only be considered
109 * for this device to enhance regulatory compliance, forcing the
110 * device to only possibly use subsets of the original regulatory
111 * rules. For example if channel 13 and 14 are disabled by this
112 * device's regulatory domain no user specified regulatory hint which
113 * has these channels enabled would enable them for this wiphy,
114 * the device's original regulatory domain will be trusted as the
115 * base. You can program the superset of regulatory rules for this
116 * wiphy with regulatory_hint() for cards programmed with an
117 * ISO3166-alpha2 country code. wiphys that use regulatory_hint()
118 * will have their wiphy->regd programmed once the regulatory
119 * domain is set, and all other regulatory hints will be ignored
120 * until their own regulatory domain gets programmed.
121 * @REGULATORY_DISABLE_BEACON_HINTS: enable this if your driver needs to
122 * ensure that passive scan flags and beaconing flags may not be lifted by
123 * cfg80211 due to regulatory beacon hints. For more information on beacon
124 * hints read the documenation for regulatory_hint_found_beacon()
125 * @REGULATORY_COUNTRY_IE_FOLLOW_POWER: for devices that have a preference
126 * that even though they may have programmed their own custom power
127 * setting prior to wiphy registration, they want to ensure their channel
128 * power settings are updated for this connection with the power settings
129 * derived from the regulatory domain. The regulatory domain used will be
130 * based on the ISO3166-alpha2 from country IE provided through
131 * regulatory_hint_country_ie()
132 * @REGULATORY_COUNTRY_IE_IGNORE: for devices that have a preference to ignore
133 * all country IE information processed by the regulatory core. This will
134 * override %REGULATORY_COUNTRY_IE_FOLLOW_POWER as all country IEs will
135 * be ignored.
136 * @REGULATORY_ENABLE_RELAX_NO_IR: for devices that wish to allow the
137 * NO_IR relaxation, which enables transmissions on channels on which
138 * otherwise initiating radiation is not allowed. This will enable the
139 * relaxations enabled under the CFG80211_REG_RELAX_NO_IR configuration
140 * option
141 * @REGULATORY_WIPHY_SELF_MANAGED: for devices that employ wiphy-specific
142 * regdom management. These devices will ignore all regdom changes not
143 * originating from their own wiphy.
144 * A self-managed wiphys only employs regulatory information obtained from
145 * the FW and driver and does not use other cfg80211 sources like
146 * beacon-hints, country-code IEs and hints from other devices on the same
147 * system. Conversely, a self-managed wiphy does not share its regulatory
148 * hints with other devices in the system. If a system contains several
149 * devices, one or more of which are self-managed, there might be
150 * contradictory regulatory settings between them. Usage of flag is
151 * generally discouraged. Only use it if the FW/driver is incompatible
152 * with non-locally originated hints.
153 * This flag is incompatible with the flags: %REGULATORY_CUSTOM_REG,
154 * %REGULATORY_STRICT_REG, %REGULATORY_COUNTRY_IE_FOLLOW_POWER,
155 * %REGULATORY_COUNTRY_IE_IGNORE and %REGULATORY_DISABLE_BEACON_HINTS.
156 * Mixing any of the above flags with this flag will result in a failure
157 * to register the wiphy. This flag implies
158 * %REGULATORY_DISABLE_BEACON_HINTS and %REGULATORY_COUNTRY_IE_IGNORE.
159 */
160 enum ieee80211_regulatory_flags {
161 REGULATORY_CUSTOM_REG = BIT(0),
162 REGULATORY_STRICT_REG = BIT(1),
163 REGULATORY_DISABLE_BEACON_HINTS = BIT(2),
164 REGULATORY_COUNTRY_IE_FOLLOW_POWER = BIT(3),
165 REGULATORY_COUNTRY_IE_IGNORE = BIT(4),
166 REGULATORY_ENABLE_RELAX_NO_IR = BIT(5),
167 /* reuse bit 6 next time */
168 REGULATORY_WIPHY_SELF_MANAGED = BIT(7),
169 };
170
171 struct ieee80211_freq_range {
172 u32 start_freq_khz;
173 u32 end_freq_khz;
174 u32 max_bandwidth_khz;
175 };
176
177 struct ieee80211_power_rule {
178 u32 max_antenna_gain;
179 u32 max_eirp;
180 };
181
182 /**
183 * struct ieee80211_wmm_ac - used to store per ac wmm regulatory limitation
184 *
185 * The information provided in this structure is required for QoS
186 * transmit queue configuration. Cf. IEEE 802.11 7.3.2.29.
187 *
188 * @cw_min: minimum contention window [a value of the form
189 * 2^n-1 in the range 1..32767]
190 * @cw_max: maximum contention window [like @cw_min]
191 * @cot: maximum burst time in units of 32 usecs, 0 meaning disabled
192 * @aifsn: arbitration interframe space [0..255]
193 *
194 */
195 struct ieee80211_wmm_ac {
196 u16 cw_min;
197 u16 cw_max;
198 u16 cot;
199 u8 aifsn;
200 };
201
202 struct ieee80211_wmm_rule {
203 struct ieee80211_wmm_ac client[IEEE80211_NUM_ACS];
204 struct ieee80211_wmm_ac ap[IEEE80211_NUM_ACS];
205 };
206
207 struct ieee80211_reg_rule {
208 struct ieee80211_freq_range freq_range;
209 struct ieee80211_power_rule power_rule;
210 struct ieee80211_wmm_rule wmm_rule;
211 u32 flags;
212 u32 dfs_cac_ms;
213 bool has_wmm;
214 s8 psd;
215 };
216
217 struct ieee80211_regdomain {
218 struct rcu_head rcu_head;
219 u32 n_reg_rules;
220 char alpha2[3];
221 enum nl80211_dfs_regions dfs_region;
222 struct ieee80211_reg_rule reg_rules[];
223 };
224
225 #define REG_RULE_EXT(start, end, bw, gain, eirp, dfs_cac, reg_flags) \
226 { \
227 .freq_range.start_freq_khz = MHZ_TO_KHZ(start), \
228 .freq_range.end_freq_khz = MHZ_TO_KHZ(end), \
229 .freq_range.max_bandwidth_khz = MHZ_TO_KHZ(bw), \
230 .power_rule.max_antenna_gain = DBI_TO_MBI(gain), \
231 .power_rule.max_eirp = DBM_TO_MBM(eirp), \
232 .flags = reg_flags, \
233 .dfs_cac_ms = dfs_cac, \
234 }
235
236 #define REG_RULE(start, end, bw, gain, eirp, reg_flags) \
237 REG_RULE_EXT(start, end, bw, gain, eirp, 0, reg_flags)
238
239 #endif
240
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