1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * HE handling
4 *
5 * Copyright(c) 2017 Intel Deutschland GmbH
6 * Copyright(c) 2019 - 2023 Intel Corporation
7 */
8
9 #include "ieee80211_i.h"
10
11 static void
ieee80211_update_from_he_6ghz_capa(const struct ieee80211_he_6ghz_capa * he_6ghz_capa,struct link_sta_info * link_sta)12 ieee80211_update_from_he_6ghz_capa(const struct ieee80211_he_6ghz_capa *he_6ghz_capa,
13 struct link_sta_info *link_sta)
14 {
15 struct sta_info *sta = link_sta->sta;
16 enum ieee80211_smps_mode smps_mode;
17
18 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
19 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
20 switch (le16_get_bits(he_6ghz_capa->capa,
21 IEEE80211_HE_6GHZ_CAP_SM_PS)) {
22 case WLAN_HT_CAP_SM_PS_INVALID:
23 case WLAN_HT_CAP_SM_PS_STATIC:
24 smps_mode = IEEE80211_SMPS_STATIC;
25 break;
26 case WLAN_HT_CAP_SM_PS_DYNAMIC:
27 smps_mode = IEEE80211_SMPS_DYNAMIC;
28 break;
29 case WLAN_HT_CAP_SM_PS_DISABLED:
30 smps_mode = IEEE80211_SMPS_OFF;
31 break;
32 }
33
34 link_sta->pub->smps_mode = smps_mode;
35 } else {
36 link_sta->pub->smps_mode = IEEE80211_SMPS_OFF;
37 }
38
39 switch (le16_get_bits(he_6ghz_capa->capa,
40 IEEE80211_HE_6GHZ_CAP_MAX_MPDU_LEN)) {
41 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454:
42 link_sta->pub->agg.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_11454;
43 break;
44 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991:
45 link_sta->pub->agg.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_7991;
46 break;
47 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895:
48 default:
49 link_sta->pub->agg.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_3895;
50 break;
51 }
52
53 ieee80211_sta_recalc_aggregates(&sta->sta);
54
55 link_sta->pub->he_6ghz_capa = *he_6ghz_capa;
56 }
57
ieee80211_he_mcs_disable(__le16 * he_mcs)58 static void ieee80211_he_mcs_disable(__le16 *he_mcs)
59 {
60 u32 i;
61
62 for (i = 0; i < 8; i++)
63 *he_mcs |= cpu_to_le16(IEEE80211_HE_MCS_NOT_SUPPORTED << i * 2);
64 }
65
ieee80211_he_mcs_intersection(__le16 * he_own_rx,__le16 * he_peer_rx,__le16 * he_own_tx,__le16 * he_peer_tx)66 static void ieee80211_he_mcs_intersection(__le16 *he_own_rx, __le16 *he_peer_rx,
67 __le16 *he_own_tx, __le16 *he_peer_tx)
68 {
69 u32 i;
70 u16 own_rx, own_tx, peer_rx, peer_tx;
71
72 for (i = 0; i < 8; i++) {
73 own_rx = le16_to_cpu(*he_own_rx);
74 own_rx = (own_rx >> i * 2) & IEEE80211_HE_MCS_NOT_SUPPORTED;
75
76 own_tx = le16_to_cpu(*he_own_tx);
77 own_tx = (own_tx >> i * 2) & IEEE80211_HE_MCS_NOT_SUPPORTED;
78
79 peer_rx = le16_to_cpu(*he_peer_rx);
80 peer_rx = (peer_rx >> i * 2) & IEEE80211_HE_MCS_NOT_SUPPORTED;
81
82 peer_tx = le16_to_cpu(*he_peer_tx);
83 peer_tx = (peer_tx >> i * 2) & IEEE80211_HE_MCS_NOT_SUPPORTED;
84
85 if (peer_tx != IEEE80211_HE_MCS_NOT_SUPPORTED) {
86 if (own_rx == IEEE80211_HE_MCS_NOT_SUPPORTED)
87 peer_tx = IEEE80211_HE_MCS_NOT_SUPPORTED;
88 else if (own_rx < peer_tx)
89 peer_tx = own_rx;
90 }
91
92 if (peer_rx != IEEE80211_HE_MCS_NOT_SUPPORTED) {
93 if (own_tx == IEEE80211_HE_MCS_NOT_SUPPORTED)
94 peer_rx = IEEE80211_HE_MCS_NOT_SUPPORTED;
95 else if (own_tx < peer_rx)
96 peer_rx = own_tx;
97 }
98
99 *he_peer_rx &=
100 ~cpu_to_le16(IEEE80211_HE_MCS_NOT_SUPPORTED << i * 2);
101 *he_peer_rx |= cpu_to_le16(peer_rx << i * 2);
102
103 *he_peer_tx &=
104 ~cpu_to_le16(IEEE80211_HE_MCS_NOT_SUPPORTED << i * 2);
105 *he_peer_tx |= cpu_to_le16(peer_tx << i * 2);
106 }
107 }
108
109 void
ieee80211_he_cap_ie_to_sta_he_cap(struct ieee80211_sub_if_data * sdata,struct ieee80211_supported_band * sband,const u8 * he_cap_ie,u8 he_cap_len,const struct ieee80211_he_6ghz_capa * he_6ghz_capa,struct link_sta_info * link_sta)110 ieee80211_he_cap_ie_to_sta_he_cap(struct ieee80211_sub_if_data *sdata,
111 struct ieee80211_supported_band *sband,
112 const u8 *he_cap_ie, u8 he_cap_len,
113 const struct ieee80211_he_6ghz_capa *he_6ghz_capa,
114 struct link_sta_info *link_sta)
115 {
116 struct ieee80211_sta_he_cap *he_cap = &link_sta->pub->he_cap;
117 const struct ieee80211_sta_he_cap *own_he_cap_ptr;
118 struct ieee80211_sta_he_cap own_he_cap;
119 struct ieee80211_he_cap_elem *he_cap_ie_elem = (void *)he_cap_ie;
120 u8 he_ppe_size;
121 u8 mcs_nss_size;
122 u8 he_total_size;
123 bool own_160, peer_160, own_80p80, peer_80p80;
124
125 memset(he_cap, 0, sizeof(*he_cap));
126
127 if (!he_cap_ie)
128 return;
129
130 own_he_cap_ptr =
131 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
132 if (!own_he_cap_ptr)
133 return;
134
135 own_he_cap = *own_he_cap_ptr;
136
137 /* Make sure size is OK */
138 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap_ie_elem);
139 he_ppe_size =
140 ieee80211_he_ppe_size(he_cap_ie[sizeof(he_cap->he_cap_elem) +
141 mcs_nss_size],
142 he_cap_ie_elem->phy_cap_info);
143 he_total_size = sizeof(he_cap->he_cap_elem) + mcs_nss_size +
144 he_ppe_size;
145 if (he_cap_len < he_total_size)
146 return;
147
148 memcpy(&he_cap->he_cap_elem, he_cap_ie, sizeof(he_cap->he_cap_elem));
149
150 /* HE Tx/Rx HE MCS NSS Support Field */
151 memcpy(&he_cap->he_mcs_nss_supp,
152 &he_cap_ie[sizeof(he_cap->he_cap_elem)], mcs_nss_size);
153
154 /* Check if there are (optional) PPE Thresholds */
155 if (he_cap->he_cap_elem.phy_cap_info[6] &
156 IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT)
157 memcpy(he_cap->ppe_thres,
158 &he_cap_ie[sizeof(he_cap->he_cap_elem) + mcs_nss_size],
159 he_ppe_size);
160
161 he_cap->has_he = true;
162
163 link_sta->cur_max_bandwidth = ieee80211_sta_cap_rx_bw(link_sta);
164 link_sta->pub->bandwidth = ieee80211_sta_cur_vht_bw(link_sta);
165
166 if (sband->band == NL80211_BAND_6GHZ && he_6ghz_capa)
167 ieee80211_update_from_he_6ghz_capa(he_6ghz_capa, link_sta);
168
169 ieee80211_he_mcs_intersection(&own_he_cap.he_mcs_nss_supp.rx_mcs_80,
170 &he_cap->he_mcs_nss_supp.rx_mcs_80,
171 &own_he_cap.he_mcs_nss_supp.tx_mcs_80,
172 &he_cap->he_mcs_nss_supp.tx_mcs_80);
173
174 own_160 = own_he_cap.he_cap_elem.phy_cap_info[0] &
175 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
176 peer_160 = he_cap->he_cap_elem.phy_cap_info[0] &
177 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
178
179 if (peer_160 && own_160) {
180 ieee80211_he_mcs_intersection(&own_he_cap.he_mcs_nss_supp.rx_mcs_160,
181 &he_cap->he_mcs_nss_supp.rx_mcs_160,
182 &own_he_cap.he_mcs_nss_supp.tx_mcs_160,
183 &he_cap->he_mcs_nss_supp.tx_mcs_160);
184 } else if (peer_160 && !own_160) {
185 ieee80211_he_mcs_disable(&he_cap->he_mcs_nss_supp.rx_mcs_160);
186 ieee80211_he_mcs_disable(&he_cap->he_mcs_nss_supp.tx_mcs_160);
187 he_cap->he_cap_elem.phy_cap_info[0] &=
188 ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
189 }
190
191 own_80p80 = own_he_cap.he_cap_elem.phy_cap_info[0] &
192 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
193 peer_80p80 = he_cap->he_cap_elem.phy_cap_info[0] &
194 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
195
196 if (peer_80p80 && own_80p80) {
197 ieee80211_he_mcs_intersection(&own_he_cap.he_mcs_nss_supp.rx_mcs_80p80,
198 &he_cap->he_mcs_nss_supp.rx_mcs_80p80,
199 &own_he_cap.he_mcs_nss_supp.tx_mcs_80p80,
200 &he_cap->he_mcs_nss_supp.tx_mcs_80p80);
201 } else if (peer_80p80 && !own_80p80) {
202 ieee80211_he_mcs_disable(&he_cap->he_mcs_nss_supp.rx_mcs_80p80);
203 ieee80211_he_mcs_disable(&he_cap->he_mcs_nss_supp.tx_mcs_80p80);
204 he_cap->he_cap_elem.phy_cap_info[0] &=
205 ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
206 }
207 }
208
209 void
ieee80211_he_op_ie_to_bss_conf(struct ieee80211_vif * vif,const struct ieee80211_he_operation * he_op_ie)210 ieee80211_he_op_ie_to_bss_conf(struct ieee80211_vif *vif,
211 const struct ieee80211_he_operation *he_op_ie)
212 {
213 memset(&vif->bss_conf.he_oper, 0, sizeof(vif->bss_conf.he_oper));
214 if (!he_op_ie)
215 return;
216
217 vif->bss_conf.he_oper.params = __le32_to_cpu(he_op_ie->he_oper_params);
218 vif->bss_conf.he_oper.nss_set = __le16_to_cpu(he_op_ie->he_mcs_nss_set);
219 }
220
221 void
ieee80211_he_spr_ie_to_bss_conf(struct ieee80211_vif * vif,const struct ieee80211_he_spr * he_spr_ie_elem)222 ieee80211_he_spr_ie_to_bss_conf(struct ieee80211_vif *vif,
223 const struct ieee80211_he_spr *he_spr_ie_elem)
224 {
225 struct ieee80211_he_obss_pd *he_obss_pd =
226 &vif->bss_conf.he_obss_pd;
227 const u8 *data;
228
229 memset(he_obss_pd, 0, sizeof(*he_obss_pd));
230
231 if (!he_spr_ie_elem)
232 return;
233 data = he_spr_ie_elem->optional;
234
235 if (he_spr_ie_elem->he_sr_control &
236 IEEE80211_HE_SPR_NON_SRG_OFFSET_PRESENT)
237 data++;
238 if (he_spr_ie_elem->he_sr_control &
239 IEEE80211_HE_SPR_SRG_INFORMATION_PRESENT) {
240 he_obss_pd->max_offset = *data++;
241 he_obss_pd->min_offset = *data++;
242 he_obss_pd->enable = true;
243 }
244 }
245