1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * HE handling
4 *
5 * Copyright(c) 2017 Intel Deutschland GmbH
6 * Copyright(c) 2019-2025 Intel Corporation
7 */
8
9#include "ieee80211_i.h"
10#include "rate.h"
11
12static void
13ieee80211_update_from_he_6ghz_capa(const struct ieee80211_he_6ghz_capa *he_6ghz_capa,
14 struct link_sta_info *link_sta)
15{
16 struct sta_info *sta = link_sta->sta;
17 enum ieee80211_smps_mode smps_mode;
18
19 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
20 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
21 switch (le16_get_bits(v: he_6ghz_capa->capa,
22 IEEE80211_HE_6GHZ_CAP_SM_PS)) {
23 case WLAN_HT_CAP_SM_PS_INVALID:
24 case WLAN_HT_CAP_SM_PS_STATIC:
25 smps_mode = IEEE80211_SMPS_STATIC;
26 break;
27 case WLAN_HT_CAP_SM_PS_DYNAMIC:
28 smps_mode = IEEE80211_SMPS_DYNAMIC;
29 break;
30 case WLAN_HT_CAP_SM_PS_DISABLED:
31 smps_mode = IEEE80211_SMPS_OFF;
32 break;
33 }
34
35 link_sta->pub->smps_mode = smps_mode;
36 } else {
37 link_sta->pub->smps_mode = IEEE80211_SMPS_OFF;
38 }
39
40 switch (le16_get_bits(v: he_6ghz_capa->capa,
41 IEEE80211_HE_6GHZ_CAP_MAX_MPDU_LEN)) {
42 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454:
43 link_sta->pub->agg.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_11454;
44 break;
45 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991:
46 link_sta->pub->agg.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_7991;
47 break;
48 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895:
49 default:
50 link_sta->pub->agg.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_3895;
51 break;
52 }
53
54 ieee80211_sta_recalc_aggregates(pubsta: &sta->sta);
55
56 link_sta->pub->he_6ghz_capa = *he_6ghz_capa;
57}
58
59static void ieee80211_he_mcs_disable(__le16 *he_mcs)
60{
61 u32 i;
62
63 for (i = 0; i < 8; i++)
64 *he_mcs |= cpu_to_le16(IEEE80211_HE_MCS_NOT_SUPPORTED << i * 2);
65}
66
67static void ieee80211_he_mcs_intersection(__le16 *he_own_rx, __le16 *he_peer_rx,
68 __le16 *he_own_tx, __le16 *he_peer_tx)
69{
70 u32 i;
71 u16 own_rx, own_tx, peer_rx, peer_tx;
72
73 for (i = 0; i < 8; i++) {
74 own_rx = le16_to_cpu(*he_own_rx);
75 own_rx = (own_rx >> i * 2) & IEEE80211_HE_MCS_NOT_SUPPORTED;
76
77 own_tx = le16_to_cpu(*he_own_tx);
78 own_tx = (own_tx >> i * 2) & IEEE80211_HE_MCS_NOT_SUPPORTED;
79
80 peer_rx = le16_to_cpu(*he_peer_rx);
81 peer_rx = (peer_rx >> i * 2) & IEEE80211_HE_MCS_NOT_SUPPORTED;
82
83 peer_tx = le16_to_cpu(*he_peer_tx);
84 peer_tx = (peer_tx >> i * 2) & IEEE80211_HE_MCS_NOT_SUPPORTED;
85
86 if (peer_tx != IEEE80211_HE_MCS_NOT_SUPPORTED) {
87 if (own_rx == IEEE80211_HE_MCS_NOT_SUPPORTED)
88 peer_tx = IEEE80211_HE_MCS_NOT_SUPPORTED;
89 else if (own_rx < peer_tx)
90 peer_tx = own_rx;
91 }
92
93 if (peer_rx != IEEE80211_HE_MCS_NOT_SUPPORTED) {
94 if (own_tx == IEEE80211_HE_MCS_NOT_SUPPORTED)
95 peer_rx = IEEE80211_HE_MCS_NOT_SUPPORTED;
96 else if (own_tx < peer_rx)
97 peer_rx = own_tx;
98 }
99
100 *he_peer_rx &=
101 ~cpu_to_le16(IEEE80211_HE_MCS_NOT_SUPPORTED << i * 2);
102 *he_peer_rx |= cpu_to_le16(peer_rx << i * 2);
103
104 *he_peer_tx &=
105 ~cpu_to_le16(IEEE80211_HE_MCS_NOT_SUPPORTED << i * 2);
106 *he_peer_tx |= cpu_to_le16(peer_tx << i * 2);
107 }
108}
109
110void
111ieee80211_he_cap_ie_to_sta_he_cap(struct ieee80211_sub_if_data *sdata,
112 struct ieee80211_supported_band *sband,
113 const u8 *he_cap_ie, u8 he_cap_len,
114 const struct ieee80211_he_6ghz_capa *he_6ghz_capa,
115 struct link_sta_info *link_sta)
116{
117 struct ieee80211_sta_he_cap *he_cap = &link_sta->pub->he_cap;
118 const struct ieee80211_sta_he_cap *own_he_cap_ptr;
119 struct ieee80211_sta_he_cap own_he_cap;
120 struct ieee80211_he_cap_elem *he_cap_ie_elem = (void *)he_cap_ie;
121 u8 he_ppe_size;
122 u8 mcs_nss_size;
123 u8 he_total_size;
124 bool own_160, peer_160, own_80p80, peer_80p80;
125
126 memset(he_cap, 0, sizeof(*he_cap));
127
128 if (!he_cap_ie)
129 return;
130
131 own_he_cap_ptr =
132 ieee80211_get_he_iftype_cap_vif(sband, vif: &sdata->vif);
133 if (!own_he_cap_ptr)
134 return;
135
136 own_he_cap = *own_he_cap_ptr;
137
138 /* Make sure size is OK */
139 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap: he_cap_ie_elem);
140 he_ppe_size =
141 ieee80211_he_ppe_size(ppe_thres_hdr: he_cap_ie[sizeof(he_cap->he_cap_elem) +
142 mcs_nss_size],
143 phy_cap_info: he_cap_ie_elem->phy_cap_info);
144 he_total_size = sizeof(he_cap->he_cap_elem) + mcs_nss_size +
145 he_ppe_size;
146 if (he_cap_len < he_total_size)
147 return;
148
149 memcpy(&he_cap->he_cap_elem, he_cap_ie, sizeof(he_cap->he_cap_elem));
150
151 /* HE Tx/Rx HE MCS NSS Support Field */
152 memcpy(&he_cap->he_mcs_nss_supp,
153 &he_cap_ie[sizeof(he_cap->he_cap_elem)], mcs_nss_size);
154
155 /* Check if there are (optional) PPE Thresholds */
156 if (he_cap->he_cap_elem.phy_cap_info[6] &
157 IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT)
158 memcpy(he_cap->ppe_thres,
159 &he_cap_ie[sizeof(he_cap->he_cap_elem) + mcs_nss_size],
160 he_ppe_size);
161
162 he_cap->has_he = true;
163
164 link_sta->cur_max_bandwidth = ieee80211_sta_cap_rx_bw(link_sta);
165 link_sta->pub->bandwidth = ieee80211_sta_cur_vht_bw(link_sta);
166
167 if (sband->band == NL80211_BAND_6GHZ && he_6ghz_capa)
168 ieee80211_update_from_he_6ghz_capa(he_6ghz_capa, link_sta);
169
170 ieee80211_he_mcs_intersection(he_own_rx: &own_he_cap.he_mcs_nss_supp.rx_mcs_80,
171 he_peer_rx: &he_cap->he_mcs_nss_supp.rx_mcs_80,
172 he_own_tx: &own_he_cap.he_mcs_nss_supp.tx_mcs_80,
173 he_peer_tx: &he_cap->he_mcs_nss_supp.tx_mcs_80);
174
175 own_160 = own_he_cap.he_cap_elem.phy_cap_info[0] &
176 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
177 peer_160 = he_cap->he_cap_elem.phy_cap_info[0] &
178 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
179
180 if (peer_160 && own_160) {
181 ieee80211_he_mcs_intersection(he_own_rx: &own_he_cap.he_mcs_nss_supp.rx_mcs_160,
182 he_peer_rx: &he_cap->he_mcs_nss_supp.rx_mcs_160,
183 he_own_tx: &own_he_cap.he_mcs_nss_supp.tx_mcs_160,
184 he_peer_tx: &he_cap->he_mcs_nss_supp.tx_mcs_160);
185 } else if (peer_160 && !own_160) {
186 ieee80211_he_mcs_disable(he_mcs: &he_cap->he_mcs_nss_supp.rx_mcs_160);
187 ieee80211_he_mcs_disable(he_mcs: &he_cap->he_mcs_nss_supp.tx_mcs_160);
188 he_cap->he_cap_elem.phy_cap_info[0] &=
189 ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
190 }
191
192 own_80p80 = own_he_cap.he_cap_elem.phy_cap_info[0] &
193 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
194 peer_80p80 = he_cap->he_cap_elem.phy_cap_info[0] &
195 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
196
197 if (peer_80p80 && own_80p80) {
198 ieee80211_he_mcs_intersection(he_own_rx: &own_he_cap.he_mcs_nss_supp.rx_mcs_80p80,
199 he_peer_rx: &he_cap->he_mcs_nss_supp.rx_mcs_80p80,
200 he_own_tx: &own_he_cap.he_mcs_nss_supp.tx_mcs_80p80,
201 he_peer_tx: &he_cap->he_mcs_nss_supp.tx_mcs_80p80);
202 } else if (peer_80p80 && !own_80p80) {
203 ieee80211_he_mcs_disable(he_mcs: &he_cap->he_mcs_nss_supp.rx_mcs_80p80);
204 ieee80211_he_mcs_disable(he_mcs: &he_cap->he_mcs_nss_supp.tx_mcs_80p80);
205 he_cap->he_cap_elem.phy_cap_info[0] &=
206 ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
207 }
208}
209
210void
211ieee80211_he_op_ie_to_bss_conf(struct ieee80211_vif *vif,
212 const struct ieee80211_he_operation *he_op_ie)
213{
214 memset(&vif->bss_conf.he_oper, 0, sizeof(vif->bss_conf.he_oper));
215 if (!he_op_ie)
216 return;
217
218 vif->bss_conf.he_oper.params = __le32_to_cpu(he_op_ie->he_oper_params);
219 vif->bss_conf.he_oper.nss_set = __le16_to_cpu(he_op_ie->he_mcs_nss_set);
220}
221
222void
223ieee80211_he_spr_ie_to_bss_conf(struct ieee80211_vif *vif,
224 const struct ieee80211_he_spr *he_spr_ie_elem)
225{
226 struct ieee80211_he_obss_pd *he_obss_pd =
227 &vif->bss_conf.he_obss_pd;
228 const u8 *data;
229
230 memset(he_obss_pd, 0, sizeof(*he_obss_pd));
231
232 if (!he_spr_ie_elem)
233 return;
234
235 he_obss_pd->sr_ctrl = he_spr_ie_elem->he_sr_control;
236 data = he_spr_ie_elem->optional;
237
238 if (he_spr_ie_elem->he_sr_control &
239 IEEE80211_HE_SPR_NON_SRG_OFFSET_PRESENT)
240 he_obss_pd->non_srg_max_offset = *data++;
241
242 if (he_spr_ie_elem->he_sr_control &
243 IEEE80211_HE_SPR_SRG_INFORMATION_PRESENT) {
244 he_obss_pd->min_offset = *data++;
245 he_obss_pd->max_offset = *data++;
246 memcpy(he_obss_pd->bss_color_bitmap, data, 8);
247 data += 8;
248 memcpy(he_obss_pd->partial_bssid_bitmap, data, 8);
249 he_obss_pd->enable = true;
250 }
251}
252
253static void ieee80211_link_sta_rc_update_omi(struct ieee80211_link_data *link,
254 struct link_sta_info *link_sta)
255{
256 struct ieee80211_sub_if_data *sdata = link->sdata;
257 struct ieee80211_supported_band *sband;
258 enum ieee80211_sta_rx_bandwidth new_bw;
259 enum nl80211_band band;
260
261 band = link->conf->chanreq.oper.chan->band;
262 sband = sdata->local->hw.wiphy->bands[band];
263
264 new_bw = ieee80211_sta_cur_vht_bw(link_sta);
265 if (link_sta->pub->bandwidth == new_bw)
266 return;
267
268 link_sta->pub->bandwidth = new_bw;
269 rate_control_rate_update(local: sdata->local, sband, link_sta,
270 changed: IEEE80211_RC_BW_CHANGED);
271}
272
273bool ieee80211_prepare_rx_omi_bw(struct ieee80211_link_sta *pub_link_sta,
274 enum ieee80211_sta_rx_bandwidth bw)
275{
276 struct sta_info *sta = container_of(pub_link_sta->sta,
277 struct sta_info, sta);
278 struct ieee80211_local *local = sta->sdata->local;
279 struct link_sta_info *link_sta =
280 sdata_dereference(sta->link[pub_link_sta->link_id], sta->sdata);
281 struct ieee80211_link_data *link =
282 sdata_dereference(sta->sdata->link[pub_link_sta->link_id],
283 sta->sdata);
284 struct ieee80211_chanctx_conf *conf;
285 struct ieee80211_chanctx *chanctx;
286 bool ret;
287
288 if (WARN_ON(!link || !link_sta || link_sta->pub != pub_link_sta))
289 return false;
290
291 conf = sdata_dereference(link->conf->chanctx_conf, sta->sdata);
292 if (WARN_ON(!conf))
293 return false;
294
295 trace_api_prepare_rx_omi_bw(local, sdata: sta->sdata, link_sta, bw);
296
297 chanctx = container_of(conf, typeof(*chanctx), conf);
298
299 if (link_sta->rx_omi_bw_staging == bw) {
300 ret = false;
301 goto trace;
302 }
303
304 /* must call this API in pairs */
305 if (WARN_ON(link_sta->rx_omi_bw_tx != link_sta->rx_omi_bw_staging ||
306 link_sta->rx_omi_bw_rx != link_sta->rx_omi_bw_staging)) {
307 ret = false;
308 goto trace;
309 }
310
311 if (bw < link_sta->rx_omi_bw_staging) {
312 link_sta->rx_omi_bw_tx = bw;
313 ieee80211_link_sta_rc_update_omi(link, link_sta);
314 } else {
315 link_sta->rx_omi_bw_rx = bw;
316 ieee80211_recalc_chanctx_min_def(local, ctx: chanctx);
317 }
318
319 link_sta->rx_omi_bw_staging = bw;
320 ret = true;
321trace:
322 trace_api_return_bool(local, result: ret);
323 return ret;
324}
325EXPORT_SYMBOL_GPL(ieee80211_prepare_rx_omi_bw);
326
327void ieee80211_finalize_rx_omi_bw(struct ieee80211_link_sta *pub_link_sta)
328{
329 struct sta_info *sta = container_of(pub_link_sta->sta,
330 struct sta_info, sta);
331 struct ieee80211_local *local = sta->sdata->local;
332 struct link_sta_info *link_sta =
333 sdata_dereference(sta->link[pub_link_sta->link_id], sta->sdata);
334 struct ieee80211_link_data *link =
335 sdata_dereference(sta->sdata->link[pub_link_sta->link_id],
336 sta->sdata);
337 struct ieee80211_chanctx_conf *conf;
338 struct ieee80211_chanctx *chanctx;
339
340 if (WARN_ON(!link || !link_sta || link_sta->pub != pub_link_sta))
341 return;
342
343 conf = sdata_dereference(link->conf->chanctx_conf, sta->sdata);
344 if (WARN_ON(!conf))
345 return;
346
347 trace_api_finalize_rx_omi_bw(local, sdata: sta->sdata, link_sta);
348
349 chanctx = container_of(conf, typeof(*chanctx), conf);
350
351 if (link_sta->rx_omi_bw_tx != link_sta->rx_omi_bw_staging) {
352 /* rate control in finalize only when widening bandwidth */
353 WARN_ON(link_sta->rx_omi_bw_tx > link_sta->rx_omi_bw_staging);
354 link_sta->rx_omi_bw_tx = link_sta->rx_omi_bw_staging;
355 ieee80211_link_sta_rc_update_omi(link, link_sta);
356 }
357
358 if (link_sta->rx_omi_bw_rx != link_sta->rx_omi_bw_staging) {
359 /* channel context in finalize only when narrowing bandwidth */
360 WARN_ON(link_sta->rx_omi_bw_rx < link_sta->rx_omi_bw_staging);
361 link_sta->rx_omi_bw_rx = link_sta->rx_omi_bw_staging;
362 ieee80211_recalc_chanctx_min_def(local, ctx: chanctx);
363 }
364
365 trace_api_return_void(local);
366}
367EXPORT_SYMBOL_GPL(ieee80211_finalize_rx_omi_bw);
368

source code of linux/net/mac80211/he.c