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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * HE handling
4 *
5 * Copyright(c) 2017 Intel Deutschland GmbH
6 * Copyright(c) 2019 - 2020 Intel Corporation
7 */
8
9#include "ieee80211_i.h"
10
11static void
12ieee80211_update_from_he_6ghz_capa(const struct ieee80211_he_6ghz_capa *he_6ghz_capa,
13 struct sta_info *sta)
14{
15 enum ieee80211_smps_mode smps_mode;
16
17 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
18 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
19 switch (le16_get_bits(he_6ghz_capa->capa,
20 IEEE80211_HE_6GHZ_CAP_SM_PS)) {
21 case WLAN_HT_CAP_SM_PS_INVALID:
22 case WLAN_HT_CAP_SM_PS_STATIC:
23 smps_mode = IEEE80211_SMPS_STATIC;
24 break;
25 case WLAN_HT_CAP_SM_PS_DYNAMIC:
26 smps_mode = IEEE80211_SMPS_DYNAMIC;
27 break;
28 case WLAN_HT_CAP_SM_PS_DISABLED:
29 smps_mode = IEEE80211_SMPS_OFF;
30 break;
31 }
32
33 sta->sta.smps_mode = smps_mode;
34 } else {
35 sta->sta.smps_mode = IEEE80211_SMPS_OFF;
36 }
37
38 switch (le16_get_bits(he_6ghz_capa->capa,
39 IEEE80211_HE_6GHZ_CAP_MAX_MPDU_LEN)) {
40 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454:
41 sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_11454;
42 break;
43 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991:
44 sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_7991;
45 break;
46 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895:
47 default:
48 sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_3895;
49 break;
50 }
51
52 sta->sta.he_6ghz_capa = *he_6ghz_capa;
53}
54
55static void ieee80211_he_mcs_disable(__le16 *he_mcs)
56{
57 u32 i;
58
59 for (i = 0; i < 8; i++)
60 *he_mcs |= cpu_to_le16(IEEE80211_HE_MCS_NOT_SUPPORTED << i * 2);
61}
62
63static void ieee80211_he_mcs_intersection(__le16 *he_own_rx, __le16 *he_peer_rx,
64 __le16 *he_own_tx, __le16 *he_peer_tx)
65{
66 u32 i;
67 u16 own_rx, own_tx, peer_rx, peer_tx;
68
69 for (i = 0; i < 8; i++) {
70 own_rx = le16_to_cpu(*he_own_rx);
71 own_rx = (own_rx >> i * 2) & IEEE80211_HE_MCS_NOT_SUPPORTED;
72
73 own_tx = le16_to_cpu(*he_own_tx);
74 own_tx = (own_tx >> i * 2) & IEEE80211_HE_MCS_NOT_SUPPORTED;
75
76 peer_rx = le16_to_cpu(*he_peer_rx);
77 peer_rx = (peer_rx >> i * 2) & IEEE80211_HE_MCS_NOT_SUPPORTED;
78
79 peer_tx = le16_to_cpu(*he_peer_tx);
80 peer_tx = (peer_tx >> i * 2) & IEEE80211_HE_MCS_NOT_SUPPORTED;
81
82 if (peer_tx != IEEE80211_HE_MCS_NOT_SUPPORTED) {
83 if (own_rx == IEEE80211_HE_MCS_NOT_SUPPORTED)
84 peer_tx = IEEE80211_HE_MCS_NOT_SUPPORTED;
85 else if (own_rx < peer_tx)
86 peer_tx = own_rx;
87 }
88
89 if (peer_rx != IEEE80211_HE_MCS_NOT_SUPPORTED) {
90 if (own_tx == IEEE80211_HE_MCS_NOT_SUPPORTED)
91 peer_rx = IEEE80211_HE_MCS_NOT_SUPPORTED;
92 else if (own_tx < peer_rx)
93 peer_rx = own_tx;
94 }
95
96 *he_peer_rx &=
97 ~cpu_to_le16(IEEE80211_HE_MCS_NOT_SUPPORTED << i * 2);
98 *he_peer_rx |= cpu_to_le16(peer_rx << i * 2);
99
100 *he_peer_tx &=
101 ~cpu_to_le16(IEEE80211_HE_MCS_NOT_SUPPORTED << i * 2);
102 *he_peer_tx |= cpu_to_le16(peer_tx << i * 2);
103 }
104}
105
106void
107ieee80211_he_cap_ie_to_sta_he_cap(struct ieee80211_sub_if_data *sdata,
108 struct ieee80211_supported_band *sband,
109 const u8 *he_cap_ie, u8 he_cap_len,
110 const struct ieee80211_he_6ghz_capa *he_6ghz_capa,
111 struct sta_info *sta)
112{
113 struct ieee80211_sta_he_cap *he_cap = &sta->sta.he_cap;
114 struct ieee80211_sta_he_cap own_he_cap;
115 struct ieee80211_he_cap_elem *he_cap_ie_elem = (void *)he_cap_ie;
116 u8 he_ppe_size;
117 u8 mcs_nss_size;
118 u8 he_total_size;
119 bool own_160, peer_160, own_80p80, peer_80p80;
120
121 memset(he_cap, 0, sizeof(*he_cap));
122
123 if (!he_cap_ie ||
124 !ieee80211_get_he_iftype_cap(sband,
125 ieee80211_vif_type_p2p(&sdata->vif)))
126 return;
127
128 own_he_cap = sband->iftype_data->he_cap;
129
130 /* Make sure size is OK */
131 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap_ie_elem);
132 he_ppe_size =
133 ieee80211_he_ppe_size(he_cap_ie[sizeof(he_cap->he_cap_elem) +
134 mcs_nss_size],
135 he_cap_ie_elem->phy_cap_info);
136 he_total_size = sizeof(he_cap->he_cap_elem) + mcs_nss_size +
137 he_ppe_size;
138 if (he_cap_len < he_total_size)
139 return;
140
141 memcpy(&he_cap->he_cap_elem, he_cap_ie, sizeof(he_cap->he_cap_elem));
142
143 /* HE Tx/Rx HE MCS NSS Support Field */
144 memcpy(&he_cap->he_mcs_nss_supp,
145 &he_cap_ie[sizeof(he_cap->he_cap_elem)], mcs_nss_size);
146
147 /* Check if there are (optional) PPE Thresholds */
148 if (he_cap->he_cap_elem.phy_cap_info[6] &
149 IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT)
150 memcpy(he_cap->ppe_thres,
151 &he_cap_ie[sizeof(he_cap->he_cap_elem) + mcs_nss_size],
152 he_ppe_size);
153
154 he_cap->has_he = true;
155
156 sta->cur_max_bandwidth = ieee80211_sta_cap_rx_bw(sta);
157 sta->sta.bandwidth = ieee80211_sta_cur_vht_bw(sta);
158
159 if (sband->band == NL80211_BAND_6GHZ && he_6ghz_capa)
160 ieee80211_update_from_he_6ghz_capa(he_6ghz_capa, sta);
161
162 ieee80211_he_mcs_intersection(&own_he_cap.he_mcs_nss_supp.rx_mcs_80,
163 &he_cap->he_mcs_nss_supp.rx_mcs_80,
164 &own_he_cap.he_mcs_nss_supp.tx_mcs_80,
165 &he_cap->he_mcs_nss_supp.tx_mcs_80);
166
167 own_160 = own_he_cap.he_cap_elem.phy_cap_info[0] &
168 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
169 peer_160 = he_cap->he_cap_elem.phy_cap_info[0] &
170 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
171
172 if (peer_160 && own_160) {
173 ieee80211_he_mcs_intersection(&own_he_cap.he_mcs_nss_supp.rx_mcs_160,
174 &he_cap->he_mcs_nss_supp.rx_mcs_160,
175 &own_he_cap.he_mcs_nss_supp.tx_mcs_160,
176 &he_cap->he_mcs_nss_supp.tx_mcs_160);
177 } else if (peer_160 && !own_160) {
178 ieee80211_he_mcs_disable(&he_cap->he_mcs_nss_supp.rx_mcs_160);
179 ieee80211_he_mcs_disable(&he_cap->he_mcs_nss_supp.tx_mcs_160);
180 he_cap->he_cap_elem.phy_cap_info[0] &=
181 ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
182 }
183
184 own_80p80 = own_he_cap.he_cap_elem.phy_cap_info[0] &
185 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
186 peer_80p80 = he_cap->he_cap_elem.phy_cap_info[0] &
187 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
188
189 if (peer_80p80 && own_80p80) {
190 ieee80211_he_mcs_intersection(&own_he_cap.he_mcs_nss_supp.rx_mcs_80p80,
191 &he_cap->he_mcs_nss_supp.rx_mcs_80p80,
192 &own_he_cap.he_mcs_nss_supp.tx_mcs_80p80,
193 &he_cap->he_mcs_nss_supp.tx_mcs_80p80);
194 } else if (peer_80p80 && !own_80p80) {
195 ieee80211_he_mcs_disable(&he_cap->he_mcs_nss_supp.rx_mcs_80p80);
196 ieee80211_he_mcs_disable(&he_cap->he_mcs_nss_supp.tx_mcs_80p80);
197 he_cap->he_cap_elem.phy_cap_info[0] &=
198 ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
199 }
200}
201
202void
203ieee80211_he_op_ie_to_bss_conf(struct ieee80211_vif *vif,
204 const struct ieee80211_he_operation *he_op_ie)
205{
206 memset(&vif->bss_conf.he_oper, 0, sizeof(vif->bss_conf.he_oper));
207 if (!he_op_ie)
208 return;
209
210 vif->bss_conf.he_oper.params = __le32_to_cpu(he_op_ie->he_oper_params);
211 vif->bss_conf.he_oper.nss_set = __le16_to_cpu(he_op_ie->he_mcs_nss_set);
212}
213
214void
215ieee80211_he_spr_ie_to_bss_conf(struct ieee80211_vif *vif,
216 const struct ieee80211_he_spr *he_spr_ie_elem)
217{
218 struct ieee80211_he_obss_pd *he_obss_pd =
219 &vif->bss_conf.he_obss_pd;
220 const u8 *data;
221
222 memset(he_obss_pd, 0, sizeof(*he_obss_pd));
223
224 if (!he_spr_ie_elem)
225 return;
226 data = he_spr_ie_elem->optional;
227
228 if (he_spr_ie_elem->he_sr_control &
229 IEEE80211_HE_SPR_NON_SRG_OFFSET_PRESENT)
230 data++;
231 if (he_spr_ie_elem->he_sr_control &
232 IEEE80211_HE_SPR_SRG_INFORMATION_PRESENT) {
233 he_obss_pd->max_offset = *data++;
234 he_obss_pd->min_offset = *data++;
235 he_obss_pd->enable = true;
236 }
237}