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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
818255ea MP |
2 | /* |
3 | * VHT handling | |
4 | * | |
23a1f8d4 | 5 | * Portions of this file |
65554d07 | 6 | * Copyright(c) 2015 - 2016 Intel Deutschland GmbH |
e80d6425 | 7 | * Copyright (C) 2018 Intel Corporation |
818255ea MP |
8 | */ |
9 | ||
10 | #include <linux/ieee80211.h> | |
11 | #include <linux/export.h> | |
12 | #include <net/mac80211.h> | |
13 | #include "ieee80211_i.h" | |
0af83d3d | 14 | #include "rate.h" |
818255ea MP |
15 | |
16 | ||
dd5ecfea JB |
17 | static void __check_vhtcap_disable(struct ieee80211_sub_if_data *sdata, |
18 | struct ieee80211_sta_vht_cap *vht_cap, | |
19 | u32 flag) | |
20 | { | |
21 | __le32 le_flag = cpu_to_le32(flag); | |
22 | ||
23 | if (sdata->u.mgd.vht_capa_mask.vht_cap_info & le_flag && | |
24 | !(sdata->u.mgd.vht_capa.vht_cap_info & le_flag)) | |
25 | vht_cap->cap &= ~flag; | |
26 | } | |
27 | ||
28 | void ieee80211_apply_vhtcap_overrides(struct ieee80211_sub_if_data *sdata, | |
29 | struct ieee80211_sta_vht_cap *vht_cap) | |
30 | { | |
31 | int i; | |
32 | u16 rxmcs_mask, rxmcs_cap, rxmcs_n, txmcs_mask, txmcs_cap, txmcs_n; | |
33 | ||
34 | if (!vht_cap->vht_supported) | |
35 | return; | |
36 | ||
37 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
38 | return; | |
39 | ||
40 | __check_vhtcap_disable(sdata, vht_cap, | |
41 | IEEE80211_VHT_CAP_RXLDPC); | |
42 | __check_vhtcap_disable(sdata, vht_cap, | |
43 | IEEE80211_VHT_CAP_SHORT_GI_80); | |
44 | __check_vhtcap_disable(sdata, vht_cap, | |
45 | IEEE80211_VHT_CAP_SHORT_GI_160); | |
46 | __check_vhtcap_disable(sdata, vht_cap, | |
47 | IEEE80211_VHT_CAP_TXSTBC); | |
48 | __check_vhtcap_disable(sdata, vht_cap, | |
49 | IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE); | |
50 | __check_vhtcap_disable(sdata, vht_cap, | |
51 | IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE); | |
52 | __check_vhtcap_disable(sdata, vht_cap, | |
53 | IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN); | |
54 | __check_vhtcap_disable(sdata, vht_cap, | |
55 | IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN); | |
56 | ||
57 | /* Allow user to decrease AMPDU length exponent */ | |
58 | if (sdata->u.mgd.vht_capa_mask.vht_cap_info & | |
59 | cpu_to_le32(IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK)) { | |
60 | u32 cap, n; | |
61 | ||
62 | n = le32_to_cpu(sdata->u.mgd.vht_capa.vht_cap_info) & | |
63 | IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK; | |
64 | n >>= IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT; | |
65 | cap = vht_cap->cap & IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK; | |
66 | cap >>= IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT; | |
67 | ||
68 | if (n < cap) { | |
69 | vht_cap->cap &= | |
70 | ~IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK; | |
71 | vht_cap->cap |= | |
72 | n << IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT; | |
73 | } | |
74 | } | |
75 | ||
76 | /* Allow the user to decrease MCSes */ | |
77 | rxmcs_mask = | |
78 | le16_to_cpu(sdata->u.mgd.vht_capa_mask.supp_mcs.rx_mcs_map); | |
79 | rxmcs_n = le16_to_cpu(sdata->u.mgd.vht_capa.supp_mcs.rx_mcs_map); | |
80 | rxmcs_n &= rxmcs_mask; | |
81 | rxmcs_cap = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map); | |
82 | ||
83 | txmcs_mask = | |
84 | le16_to_cpu(sdata->u.mgd.vht_capa_mask.supp_mcs.tx_mcs_map); | |
85 | txmcs_n = le16_to_cpu(sdata->u.mgd.vht_capa.supp_mcs.tx_mcs_map); | |
86 | txmcs_n &= txmcs_mask; | |
87 | txmcs_cap = le16_to_cpu(vht_cap->vht_mcs.tx_mcs_map); | |
88 | for (i = 0; i < 8; i++) { | |
89 | u8 m, n, c; | |
90 | ||
91 | m = (rxmcs_mask >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED; | |
92 | n = (rxmcs_n >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED; | |
93 | c = (rxmcs_cap >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED; | |
94 | ||
95 | if (m && ((c != IEEE80211_VHT_MCS_NOT_SUPPORTED && n < c) || | |
96 | n == IEEE80211_VHT_MCS_NOT_SUPPORTED)) { | |
97 | rxmcs_cap &= ~(3 << 2*i); | |
98 | rxmcs_cap |= (rxmcs_n & (3 << 2*i)); | |
99 | } | |
100 | ||
101 | m = (txmcs_mask >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED; | |
102 | n = (txmcs_n >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED; | |
103 | c = (txmcs_cap >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED; | |
104 | ||
105 | if (m && ((c != IEEE80211_VHT_MCS_NOT_SUPPORTED && n < c) || | |
106 | n == IEEE80211_VHT_MCS_NOT_SUPPORTED)) { | |
107 | txmcs_cap &= ~(3 << 2*i); | |
108 | txmcs_cap |= (txmcs_n & (3 << 2*i)); | |
109 | } | |
110 | } | |
111 | vht_cap->vht_mcs.rx_mcs_map = cpu_to_le16(rxmcs_cap); | |
112 | vht_cap->vht_mcs.tx_mcs_map = cpu_to_le16(txmcs_cap); | |
113 | } | |
114 | ||
4a3cb702 JB |
115 | void |
116 | ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata, | |
117 | struct ieee80211_supported_band *sband, | |
118 | const struct ieee80211_vht_cap *vht_cap_ie, | |
119 | struct sta_info *sta) | |
818255ea | 120 | { |
4a34215e | 121 | struct ieee80211_sta_vht_cap *vht_cap = &sta->sta.vht_cap; |
55d942f4 JB |
122 | struct ieee80211_sta_vht_cap own_cap; |
123 | u32 cap_info, i; | |
52a45f38 | 124 | bool have_80mhz; |
818255ea MP |
125 | |
126 | memset(vht_cap, 0, sizeof(*vht_cap)); | |
127 | ||
4a34215e JB |
128 | if (!sta->sta.ht_cap.ht_supported) |
129 | return; | |
130 | ||
818255ea MP |
131 | if (!vht_cap_ie || !sband->vht_cap.vht_supported) |
132 | return; | |
133 | ||
52a45f38 AN |
134 | /* Allow VHT if at least one channel on the sband supports 80 MHz */ |
135 | have_80mhz = false; | |
136 | for (i = 0; i < sband->n_channels; i++) { | |
137 | if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | | |
138 | IEEE80211_CHAN_NO_80MHZ)) | |
139 | continue; | |
140 | ||
141 | have_80mhz = true; | |
142 | break; | |
143 | } | |
144 | ||
145 | if (!have_80mhz) | |
146 | return; | |
147 | ||
4a817aa7 JB |
148 | /* |
149 | * A VHT STA must support 40 MHz, but if we verify that here | |
150 | * then we break a few things - some APs (e.g. Netgear R6300v2 | |
151 | * and others based on the BCM4360 chipset) will unset this | |
152 | * capability bit when operating in 20 MHz. | |
153 | */ | |
e1a0c6b3 | 154 | |
818255ea MP |
155 | vht_cap->vht_supported = true; |
156 | ||
55d942f4 JB |
157 | own_cap = sband->vht_cap; |
158 | /* | |
159 | * If user has specified capability overrides, take care | |
160 | * of that if the station we're setting up is the AP that | |
161 | * we advertised a restricted capability set to. Override | |
162 | * our own capabilities and then use those below. | |
163 | */ | |
164 | if (sdata->vif.type == NL80211_IFTYPE_STATION && | |
165 | !test_sta_flag(sta, WLAN_STA_TDLS_PEER)) | |
166 | ieee80211_apply_vhtcap_overrides(sdata, &own_cap); | |
167 | ||
168 | /* take some capabilities as-is */ | |
169 | cap_info = le32_to_cpu(vht_cap_ie->vht_cap_info); | |
170 | vht_cap->cap = cap_info; | |
171 | vht_cap->cap &= IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895 | | |
172 | IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991 | | |
173 | IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454 | | |
174 | IEEE80211_VHT_CAP_RXLDPC | | |
175 | IEEE80211_VHT_CAP_VHT_TXOP_PS | | |
176 | IEEE80211_VHT_CAP_HTC_VHT | | |
177 | IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK | | |
178 | IEEE80211_VHT_CAP_VHT_LINK_ADAPTATION_VHT_UNSOL_MFB | | |
179 | IEEE80211_VHT_CAP_VHT_LINK_ADAPTATION_VHT_MRQ_MFB | | |
180 | IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN | | |
181 | IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN; | |
182 | ||
183 | /* and some based on our own capabilities */ | |
184 | switch (own_cap.cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) { | |
185 | case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ: | |
186 | vht_cap->cap |= cap_info & | |
187 | IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; | |
188 | break; | |
189 | case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ: | |
190 | vht_cap->cap |= cap_info & | |
191 | IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; | |
192 | break; | |
193 | default: | |
194 | /* nothing */ | |
195 | break; | |
196 | } | |
197 | ||
198 | /* symmetric capabilities */ | |
199 | vht_cap->cap |= cap_info & own_cap.cap & | |
200 | (IEEE80211_VHT_CAP_SHORT_GI_80 | | |
201 | IEEE80211_VHT_CAP_SHORT_GI_160); | |
202 | ||
203 | /* remaining ones */ | |
fbdd90ea | 204 | if (own_cap.cap & IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE) |
55d942f4 JB |
205 | vht_cap->cap |= cap_info & |
206 | (IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | | |
fbdd90ea | 207 | IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_MASK); |
55d942f4 JB |
208 | |
209 | if (own_cap.cap & IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE) | |
210 | vht_cap->cap |= cap_info & | |
5eb7906b | 211 | (IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | |
fbdd90ea | 212 | IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK); |
55d942f4 JB |
213 | |
214 | if (own_cap.cap & IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE) | |
215 | vht_cap->cap |= cap_info & | |
216 | IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; | |
217 | ||
218 | if (own_cap.cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) | |
219 | vht_cap->cap |= cap_info & | |
220 | IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE; | |
221 | ||
222 | if (own_cap.cap & IEEE80211_VHT_CAP_TXSTBC) | |
223 | vht_cap->cap |= cap_info & IEEE80211_VHT_CAP_RXSTBC_MASK; | |
224 | ||
225 | if (own_cap.cap & IEEE80211_VHT_CAP_RXSTBC_MASK) | |
226 | vht_cap->cap |= cap_info & IEEE80211_VHT_CAP_TXSTBC; | |
818255ea MP |
227 | |
228 | /* Copy peer MCS info, the driver might need them. */ | |
229 | memcpy(&vht_cap->vht_mcs, &vht_cap_ie->supp_mcs, | |
230 | sizeof(struct ieee80211_vht_mcs_info)); | |
e1a0c6b3 | 231 | |
e80d6425 JB |
232 | /* copy EXT_NSS_BW Support value or remove the capability */ |
233 | if (ieee80211_hw_check(&sdata->local->hw, SUPPORTS_VHT_EXT_NSS_BW)) | |
234 | vht_cap->cap |= (cap_info & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK); | |
235 | else | |
236 | vht_cap->vht_mcs.tx_highest &= | |
237 | ~cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE); | |
238 | ||
55d942f4 JB |
239 | /* but also restrict MCSes */ |
240 | for (i = 0; i < 8; i++) { | |
241 | u16 own_rx, own_tx, peer_rx, peer_tx; | |
242 | ||
243 | own_rx = le16_to_cpu(own_cap.vht_mcs.rx_mcs_map); | |
244 | own_rx = (own_rx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED; | |
245 | ||
246 | own_tx = le16_to_cpu(own_cap.vht_mcs.tx_mcs_map); | |
247 | own_tx = (own_tx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED; | |
248 | ||
249 | peer_rx = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map); | |
250 | peer_rx = (peer_rx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED; | |
251 | ||
252 | peer_tx = le16_to_cpu(vht_cap->vht_mcs.tx_mcs_map); | |
253 | peer_tx = (peer_tx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED; | |
254 | ||
255 | if (peer_tx != IEEE80211_VHT_MCS_NOT_SUPPORTED) { | |
256 | if (own_rx == IEEE80211_VHT_MCS_NOT_SUPPORTED) | |
257 | peer_tx = IEEE80211_VHT_MCS_NOT_SUPPORTED; | |
258 | else if (own_rx < peer_tx) | |
259 | peer_tx = own_rx; | |
260 | } | |
261 | ||
262 | if (peer_rx != IEEE80211_VHT_MCS_NOT_SUPPORTED) { | |
263 | if (own_tx == IEEE80211_VHT_MCS_NOT_SUPPORTED) | |
264 | peer_rx = IEEE80211_VHT_MCS_NOT_SUPPORTED; | |
265 | else if (own_tx < peer_rx) | |
266 | peer_rx = own_tx; | |
267 | } | |
268 | ||
269 | vht_cap->vht_mcs.rx_mcs_map &= | |
270 | ~cpu_to_le16(IEEE80211_VHT_MCS_NOT_SUPPORTED << i * 2); | |
271 | vht_cap->vht_mcs.rx_mcs_map |= cpu_to_le16(peer_rx << i * 2); | |
272 | ||
273 | vht_cap->vht_mcs.tx_mcs_map &= | |
274 | ~cpu_to_le16(IEEE80211_VHT_MCS_NOT_SUPPORTED << i * 2); | |
275 | vht_cap->vht_mcs.tx_mcs_map |= cpu_to_le16(peer_tx << i * 2); | |
276 | } | |
277 | ||
c8eaf347 FM |
278 | /* |
279 | * This is a workaround for VHT-enabled STAs which break the spec | |
280 | * and have the VHT-MCS Rx map filled in with value 3 for all eight | |
281 | * spacial streams, an example is AR9462. | |
282 | * | |
283 | * As per spec, in section 22.1.1 Introduction to the VHT PHY | |
284 | * A VHT STA shall support at least single spactial stream VHT-MCSs | |
285 | * 0 to 7 (transmit and receive) in all supported channel widths. | |
286 | */ | |
287 | if (vht_cap->vht_mcs.rx_mcs_map == cpu_to_le16(0xFFFF)) { | |
288 | vht_cap->vht_supported = false; | |
289 | sdata_info(sdata, "Ignoring VHT IE from %pM due to invalid rx_mcs_map\n", | |
290 | sta->addr); | |
291 | return; | |
292 | } | |
293 | ||
55d942f4 | 294 | /* finally set up the bandwidth */ |
0af83d3d JB |
295 | switch (vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) { |
296 | case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ: | |
297 | case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ: | |
298 | sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160; | |
299 | break; | |
300 | default: | |
301 | sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80; | |
e80d6425 JB |
302 | |
303 | if (!(vht_cap->vht_mcs.tx_highest & | |
304 | cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE))) | |
305 | break; | |
306 | ||
307 | /* | |
308 | * If this is non-zero, then it does support 160 MHz after all, | |
309 | * in one form or the other. We don't distinguish here (or even | |
310 | * above) between 160 and 80+80 yet. | |
311 | */ | |
312 | if (cap_info & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) | |
313 | sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160; | |
0af83d3d JB |
314 | } |
315 | ||
e1a0c6b3 | 316 | sta->sta.bandwidth = ieee80211_sta_cur_vht_bw(sta); |
506bcfa8 EG |
317 | |
318 | /* If HT IE reported 3839 bytes only, stay with that size. */ | |
319 | if (sta->sta.max_amsdu_len == IEEE80211_MAX_MPDU_LEN_HT_3839) | |
320 | return; | |
321 | ||
322 | switch (vht_cap->cap & IEEE80211_VHT_CAP_MAX_MPDU_MASK) { | |
323 | case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454: | |
324 | sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_11454; | |
325 | break; | |
326 | case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991: | |
327 | sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_7991; | |
328 | break; | |
329 | case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895: | |
330 | default: | |
331 | sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_3895; | |
332 | break; | |
333 | } | |
e1a0c6b3 JB |
334 | } |
335 | ||
1c45c5ce | 336 | enum ieee80211_sta_rx_bandwidth ieee80211_sta_cap_rx_bw(struct sta_info *sta) |
e1a0c6b3 | 337 | { |
1c45c5ce EP |
338 | struct ieee80211_sta_vht_cap *vht_cap = &sta->sta.vht_cap; |
339 | u32 cap_width; | |
e1a0c6b3 | 340 | |
1c45c5ce EP |
341 | if (!vht_cap->vht_supported) |
342 | return sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? | |
343 | IEEE80211_STA_RX_BW_40 : | |
344 | IEEE80211_STA_RX_BW_20; | |
e1a0c6b3 | 345 | |
1c45c5ce EP |
346 | cap_width = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; |
347 | ||
348 | if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ || | |
349 | cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) | |
350 | return IEEE80211_STA_RX_BW_160; | |
351 | ||
352 | return IEEE80211_STA_RX_BW_80; | |
353 | } | |
354 | ||
59021c67 AN |
355 | enum nl80211_chan_width ieee80211_sta_cap_chan_bw(struct sta_info *sta) |
356 | { | |
357 | struct ieee80211_sta_vht_cap *vht_cap = &sta->sta.vht_cap; | |
358 | u32 cap_width; | |
359 | ||
360 | if (!vht_cap->vht_supported) { | |
361 | if (!sta->sta.ht_cap.ht_supported) | |
362 | return NL80211_CHAN_WIDTH_20_NOHT; | |
363 | ||
364 | return sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? | |
365 | NL80211_CHAN_WIDTH_40 : NL80211_CHAN_WIDTH_20; | |
366 | } | |
367 | ||
368 | cap_width = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; | |
369 | ||
370 | if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ) | |
371 | return NL80211_CHAN_WIDTH_160; | |
372 | else if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) | |
373 | return NL80211_CHAN_WIDTH_80P80; | |
374 | ||
375 | return NL80211_CHAN_WIDTH_80; | |
376 | } | |
377 | ||
97f5f425 | 378 | enum nl80211_chan_width |
379 | ieee80211_sta_rx_bw_to_chan_width(struct sta_info *sta) | |
380 | { | |
381 | enum ieee80211_sta_rx_bandwidth cur_bw = sta->sta.bandwidth; | |
382 | struct ieee80211_sta_vht_cap *vht_cap = &sta->sta.vht_cap; | |
383 | u32 cap_width; | |
384 | ||
385 | switch (cur_bw) { | |
386 | case IEEE80211_STA_RX_BW_20: | |
387 | if (!sta->sta.ht_cap.ht_supported) | |
388 | return NL80211_CHAN_WIDTH_20_NOHT; | |
389 | else | |
390 | return NL80211_CHAN_WIDTH_20; | |
391 | case IEEE80211_STA_RX_BW_40: | |
392 | return NL80211_CHAN_WIDTH_40; | |
393 | case IEEE80211_STA_RX_BW_80: | |
394 | return NL80211_CHAN_WIDTH_80; | |
395 | case IEEE80211_STA_RX_BW_160: | |
396 | cap_width = | |
397 | vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; | |
398 | ||
399 | if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ) | |
400 | return NL80211_CHAN_WIDTH_160; | |
401 | ||
402 | return NL80211_CHAN_WIDTH_80P80; | |
403 | default: | |
404 | return NL80211_CHAN_WIDTH_20; | |
405 | } | |
406 | } | |
407 | ||
59021c67 | 408 | enum ieee80211_sta_rx_bandwidth |
1c45c5ce EP |
409 | ieee80211_chan_width_to_rx_bw(enum nl80211_chan_width width) |
410 | { | |
411 | switch (width) { | |
e1a0c6b3 JB |
412 | case NL80211_CHAN_WIDTH_20_NOHT: |
413 | case NL80211_CHAN_WIDTH_20: | |
1c45c5ce | 414 | return IEEE80211_STA_RX_BW_20; |
e1a0c6b3 | 415 | case NL80211_CHAN_WIDTH_40: |
1c45c5ce EP |
416 | return IEEE80211_STA_RX_BW_40; |
417 | case NL80211_CHAN_WIDTH_80: | |
418 | return IEEE80211_STA_RX_BW_80; | |
e1a0c6b3 | 419 | case NL80211_CHAN_WIDTH_160: |
e1a0c6b3 | 420 | case NL80211_CHAN_WIDTH_80P80: |
1c45c5ce EP |
421 | return IEEE80211_STA_RX_BW_160; |
422 | default: | |
423 | WARN_ON_ONCE(1); | |
424 | return IEEE80211_STA_RX_BW_20; | |
e1a0c6b3 | 425 | } |
1c45c5ce EP |
426 | } |
427 | ||
428 | enum ieee80211_sta_rx_bandwidth ieee80211_sta_cur_vht_bw(struct sta_info *sta) | |
429 | { | |
430 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
431 | enum ieee80211_sta_rx_bandwidth bw; | |
b98fb44f | 432 | enum nl80211_chan_width bss_width = sdata->vif.bss_conf.chandef.width; |
1c45c5ce | 433 | |
b98fb44f | 434 | bw = ieee80211_sta_cap_rx_bw(sta); |
1c45c5ce | 435 | bw = min(bw, sta->cur_max_bandwidth); |
504871e6 MP |
436 | |
437 | /* Don't consider AP's bandwidth for TDLS peers, section 11.23.1 of | |
438 | * IEEE80211-2016 specification makes higher bandwidth operation | |
439 | * possible on the TDLS link if the peers have wider bandwidth | |
440 | * capability. | |
441 | */ | |
442 | if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) && | |
443 | test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW)) | |
444 | return bw; | |
445 | ||
59021c67 | 446 | bw = min(bw, ieee80211_chan_width_to_rx_bw(bss_width)); |
b98fb44f | 447 | |
0af83d3d | 448 | return bw; |
818255ea | 449 | } |
8921d04e JB |
450 | |
451 | void ieee80211_sta_set_rx_nss(struct sta_info *sta) | |
452 | { | |
453 | u8 ht_rx_nss = 0, vht_rx_nss = 0; | |
454 | ||
455 | /* if we received a notification already don't overwrite it */ | |
456 | if (sta->sta.rx_nss) | |
457 | return; | |
458 | ||
459 | if (sta->sta.ht_cap.ht_supported) { | |
460 | if (sta->sta.ht_cap.mcs.rx_mask[0]) | |
461 | ht_rx_nss++; | |
462 | if (sta->sta.ht_cap.mcs.rx_mask[1]) | |
463 | ht_rx_nss++; | |
464 | if (sta->sta.ht_cap.mcs.rx_mask[2]) | |
465 | ht_rx_nss++; | |
466 | if (sta->sta.ht_cap.mcs.rx_mask[3]) | |
467 | ht_rx_nss++; | |
468 | /* FIXME: consider rx_highest? */ | |
469 | } | |
470 | ||
471 | if (sta->sta.vht_cap.vht_supported) { | |
472 | int i; | |
473 | u16 rx_mcs_map; | |
474 | ||
475 | rx_mcs_map = le16_to_cpu(sta->sta.vht_cap.vht_mcs.rx_mcs_map); | |
476 | ||
477 | for (i = 7; i >= 0; i--) { | |
478 | u8 mcs = (rx_mcs_map >> (2 * i)) & 3; | |
479 | ||
480 | if (mcs != IEEE80211_VHT_MCS_NOT_SUPPORTED) { | |
481 | vht_rx_nss = i + 1; | |
482 | break; | |
483 | } | |
484 | } | |
485 | /* FIXME: consider rx_highest? */ | |
486 | } | |
487 | ||
488 | ht_rx_nss = max(ht_rx_nss, vht_rx_nss); | |
489 | sta->sta.rx_nss = max_t(u8, 1, ht_rx_nss); | |
490 | } | |
0af83d3d | 491 | |
b1bce14a MK |
492 | u32 __ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata, |
493 | struct sta_info *sta, u8 opmode, | |
57fbcce3 | 494 | enum nl80211_band band) |
0af83d3d | 495 | { |
0af83d3d | 496 | enum ieee80211_sta_rx_bandwidth new_bw; |
ff84e7bf | 497 | struct sta_opmode_info sta_opmode = {}; |
0af83d3d JB |
498 | u32 changed = 0; |
499 | u8 nss; | |
500 | ||
0af83d3d JB |
501 | /* ignore - no support for BF yet */ |
502 | if (opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF) | |
b1bce14a | 503 | return 0; |
0af83d3d JB |
504 | |
505 | nss = opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; | |
506 | nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; | |
507 | nss += 1; | |
508 | ||
509 | if (sta->sta.rx_nss != nss) { | |
510 | sta->sta.rx_nss = nss; | |
ff84e7bf | 511 | sta_opmode.rx_nss = nss; |
0af83d3d | 512 | changed |= IEEE80211_RC_NSS_CHANGED; |
ff84e7bf | 513 | sta_opmode.changed |= STA_OPMODE_N_SS_CHANGED; |
0af83d3d JB |
514 | } |
515 | ||
516 | switch (opmode & IEEE80211_OPMODE_NOTIF_CHANWIDTH_MASK) { | |
517 | case IEEE80211_OPMODE_NOTIF_CHANWIDTH_20MHZ: | |
518 | sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_20; | |
519 | break; | |
520 | case IEEE80211_OPMODE_NOTIF_CHANWIDTH_40MHZ: | |
521 | sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_40; | |
522 | break; | |
523 | case IEEE80211_OPMODE_NOTIF_CHANWIDTH_80MHZ: | |
524 | sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80; | |
525 | break; | |
526 | case IEEE80211_OPMODE_NOTIF_CHANWIDTH_160MHZ: | |
527 | sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160; | |
528 | break; | |
529 | } | |
530 | ||
531 | new_bw = ieee80211_sta_cur_vht_bw(sta); | |
532 | if (new_bw != sta->sta.bandwidth) { | |
533 | sta->sta.bandwidth = new_bw; | |
97f5f425 | 534 | sta_opmode.bw = ieee80211_sta_rx_bw_to_chan_width(sta); |
38745c74 | 535 | changed |= IEEE80211_RC_BW_CHANGED; |
ff84e7bf | 536 | sta_opmode.changed |= STA_OPMODE_MAX_BW_CHANGED; |
0af83d3d JB |
537 | } |
538 | ||
ff84e7bf | 539 | if (sta_opmode.changed) |
540 | cfg80211_sta_opmode_change_notify(sdata->dev, sta->addr, | |
541 | &sta_opmode, GFP_KERNEL); | |
542 | ||
b1bce14a MK |
543 | return changed; |
544 | } | |
545 | ||
23a1f8d4 SS |
546 | void ieee80211_process_mu_groups(struct ieee80211_sub_if_data *sdata, |
547 | struct ieee80211_mgmt *mgmt) | |
548 | { | |
549 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; | |
550 | ||
b5a33d52 | 551 | if (!sdata->vif.mu_mimo_owner) |
23a1f8d4 SS |
552 | return; |
553 | ||
554 | if (!memcmp(mgmt->u.action.u.vht_group_notif.position, | |
555 | bss_conf->mu_group.position, WLAN_USER_POSITION_LEN) && | |
556 | !memcmp(mgmt->u.action.u.vht_group_notif.membership, | |
557 | bss_conf->mu_group.membership, WLAN_MEMBERSHIP_LEN)) | |
558 | return; | |
559 | ||
0241fa19 SS |
560 | memcpy(bss_conf->mu_group.membership, |
561 | mgmt->u.action.u.vht_group_notif.membership, | |
562 | WLAN_MEMBERSHIP_LEN); | |
563 | memcpy(bss_conf->mu_group.position, | |
564 | mgmt->u.action.u.vht_group_notif.position, | |
565 | WLAN_USER_POSITION_LEN); | |
23a1f8d4 SS |
566 | |
567 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_MU_GROUPS); | |
568 | } | |
569 | ||
65554d07 SS |
570 | void ieee80211_update_mu_groups(struct ieee80211_vif *vif, |
571 | const u8 *membership, const u8 *position) | |
572 | { | |
b5a33d52 | 573 | struct ieee80211_bss_conf *bss_conf = &vif->bss_conf; |
65554d07 | 574 | |
b5a33d52 | 575 | if (WARN_ON_ONCE(!vif->mu_mimo_owner)) |
65554d07 SS |
576 | return; |
577 | ||
578 | memcpy(bss_conf->mu_group.membership, membership, WLAN_MEMBERSHIP_LEN); | |
579 | memcpy(bss_conf->mu_group.position, position, WLAN_USER_POSITION_LEN); | |
580 | } | |
581 | EXPORT_SYMBOL_GPL(ieee80211_update_mu_groups); | |
582 | ||
b1bce14a MK |
583 | void ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata, |
584 | struct sta_info *sta, u8 opmode, | |
57fbcce3 | 585 | enum nl80211_band band) |
b1bce14a MK |
586 | { |
587 | struct ieee80211_local *local = sdata->local; | |
588 | struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band]; | |
589 | ||
cf1e05c6 | 590 | u32 changed = __ieee80211_vht_handle_opmode(sdata, sta, opmode, band); |
b1bce14a | 591 | |
d2941df8 JB |
592 | if (changed > 0) { |
593 | ieee80211_recalc_min_chandef(sdata); | |
0af83d3d | 594 | rate_control_rate_update(local, sband, sta, changed); |
d2941df8 | 595 | } |
0af83d3d | 596 | } |
b119ad6e LB |
597 | |
598 | void ieee80211_get_vht_mask_from_cap(__le16 vht_cap, | |
599 | u16 vht_mask[NL80211_VHT_NSS_MAX]) | |
600 | { | |
601 | int i; | |
602 | u16 mask, cap = le16_to_cpu(vht_cap); | |
603 | ||
604 | for (i = 0; i < NL80211_VHT_NSS_MAX; i++) { | |
605 | mask = (cap >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED; | |
606 | switch (mask) { | |
607 | case IEEE80211_VHT_MCS_SUPPORT_0_7: | |
608 | vht_mask[i] = 0x00FF; | |
609 | break; | |
610 | case IEEE80211_VHT_MCS_SUPPORT_0_8: | |
611 | vht_mask[i] = 0x01FF; | |
612 | break; | |
613 | case IEEE80211_VHT_MCS_SUPPORT_0_9: | |
614 | vht_mask[i] = 0x03FF; | |
615 | break; | |
616 | case IEEE80211_VHT_MCS_NOT_SUPPORTED: | |
617 | default: | |
618 | vht_mask[i] = 0; | |
619 | break; | |
620 | } | |
621 | } | |
622 | } |