Johannes Berg | 44d414d | 2008-09-08 17:44:28 +0200 | [diff] [blame] | 1 | /* |
| 2 | * HT handling |
| 3 | * |
| 4 | * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi> |
Johannes Berg | bacac54 | 2008-09-08 17:44:29 +0200 | [diff] [blame] | 5 | * Copyright 2002-2005, Instant802 Networks, Inc. |
| 6 | * Copyright 2005-2006, Devicescape Software, Inc. |
Johannes Berg | 44d414d | 2008-09-08 17:44:28 +0200 | [diff] [blame] | 7 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> |
| 8 | * Copyright 2007, Michael Wu <flamingice@sourmilk.net> |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 9 | * Copyright 2007-2010, Intel Corporation |
Johannes Berg | fd500b3 | 2017-05-27 00:27:25 +0200 | [diff] [blame^] | 10 | * Copyright 2017 Intel Deutschland GmbH |
Johannes Berg | 44d414d | 2008-09-08 17:44:28 +0200 | [diff] [blame] | 11 | * |
| 12 | * This program is free software; you can redistribute it and/or modify |
| 13 | * it under the terms of the GNU General Public License version 2 as |
| 14 | * published by the Free Software Foundation. |
| 15 | */ |
| 16 | |
| 17 | #include <linux/ieee80211.h> |
Paul Gortmaker | bc3b2d7 | 2011-07-15 11:47:34 -0400 | [diff] [blame] | 18 | #include <linux/export.h> |
Johannes Berg | 44d414d | 2008-09-08 17:44:28 +0200 | [diff] [blame] | 19 | #include <net/mac80211.h> |
| 20 | #include "ieee80211_i.h" |
Sujith | 81cb762 | 2009-02-12 11:38:37 +0530 | [diff] [blame] | 21 | #include "rate.h" |
Johannes Berg | 44d414d | 2008-09-08 17:44:28 +0200 | [diff] [blame] | 22 | |
Simon Wunderlich | 822854b | 2013-06-28 10:39:59 +0200 | [diff] [blame] | 23 | static void __check_htcap_disable(struct ieee80211_ht_cap *ht_capa, |
| 24 | struct ieee80211_ht_cap *ht_capa_mask, |
Ben Greear | 32dfefa | 2011-11-24 11:15:21 -0800 | [diff] [blame] | 25 | struct ieee80211_sta_ht_cap *ht_cap, |
| 26 | u16 flag) |
Ben Greear | ef96a842 | 2011-11-18 11:32:00 -0800 | [diff] [blame] | 27 | { |
| 28 | __le16 le_flag = cpu_to_le16(flag); |
Simon Wunderlich | 822854b | 2013-06-28 10:39:59 +0200 | [diff] [blame] | 29 | if (ht_capa_mask->cap_info & le_flag) { |
| 30 | if (!(ht_capa->cap_info & le_flag)) |
Ben Greear | ef96a842 | 2011-11-18 11:32:00 -0800 | [diff] [blame] | 31 | ht_cap->cap &= ~flag; |
| 32 | } |
| 33 | } |
| 34 | |
Jouni Malinen | 9a07bf5 | 2014-04-15 19:13:56 +0300 | [diff] [blame] | 35 | static void __check_htcap_enable(struct ieee80211_ht_cap *ht_capa, |
| 36 | struct ieee80211_ht_cap *ht_capa_mask, |
| 37 | struct ieee80211_sta_ht_cap *ht_cap, |
| 38 | u16 flag) |
| 39 | { |
| 40 | __le16 le_flag = cpu_to_le16(flag); |
| 41 | |
| 42 | if ((ht_capa_mask->cap_info & le_flag) && |
| 43 | (ht_capa->cap_info & le_flag)) |
| 44 | ht_cap->cap |= flag; |
| 45 | } |
| 46 | |
Ben Greear | ef96a842 | 2011-11-18 11:32:00 -0800 | [diff] [blame] | 47 | void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata, |
| 48 | struct ieee80211_sta_ht_cap *ht_cap) |
| 49 | { |
Simon Wunderlich | 822854b | 2013-06-28 10:39:59 +0200 | [diff] [blame] | 50 | struct ieee80211_ht_cap *ht_capa, *ht_capa_mask; |
| 51 | u8 *scaps, *smask; |
Ben Greear | ef96a842 | 2011-11-18 11:32:00 -0800 | [diff] [blame] | 52 | int i; |
| 53 | |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 54 | if (!ht_cap->ht_supported) |
| 55 | return; |
| 56 | |
Simon Wunderlich | 822854b | 2013-06-28 10:39:59 +0200 | [diff] [blame] | 57 | switch (sdata->vif.type) { |
| 58 | case NL80211_IFTYPE_STATION: |
| 59 | ht_capa = &sdata->u.mgd.ht_capa; |
| 60 | ht_capa_mask = &sdata->u.mgd.ht_capa_mask; |
| 61 | break; |
| 62 | case NL80211_IFTYPE_ADHOC: |
| 63 | ht_capa = &sdata->u.ibss.ht_capa; |
| 64 | ht_capa_mask = &sdata->u.ibss.ht_capa_mask; |
| 65 | break; |
| 66 | default: |
| 67 | WARN_ON_ONCE(1); |
| 68 | return; |
| 69 | } |
| 70 | |
| 71 | scaps = (u8 *)(&ht_capa->mcs.rx_mask); |
| 72 | smask = (u8 *)(&ht_capa_mask->mcs.rx_mask); |
| 73 | |
Ben Greear | ef96a842 | 2011-11-18 11:32:00 -0800 | [diff] [blame] | 74 | /* NOTE: If you add more over-rides here, update register_hw |
Jouni Malinen | 9a07bf5 | 2014-04-15 19:13:56 +0300 | [diff] [blame] | 75 | * ht_capa_mod_mask logic in main.c as well. |
Ben Greear | ef96a842 | 2011-11-18 11:32:00 -0800 | [diff] [blame] | 76 | * And, if this method can ever change ht_cap.ht_supported, fix |
| 77 | * the check in ieee80211_add_ht_ie. |
| 78 | */ |
| 79 | |
| 80 | /* check for HT over-rides, MCS rates first. */ |
| 81 | for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) { |
| 82 | u8 m = smask[i]; |
| 83 | ht_cap->mcs.rx_mask[i] &= ~m; /* turn off all masked bits */ |
| 84 | /* Add back rates that are supported */ |
| 85 | ht_cap->mcs.rx_mask[i] |= (m & scaps[i]); |
| 86 | } |
| 87 | |
| 88 | /* Force removal of HT-40 capabilities? */ |
Simon Wunderlich | 822854b | 2013-06-28 10:39:59 +0200 | [diff] [blame] | 89 | __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap, |
| 90 | IEEE80211_HT_CAP_SUP_WIDTH_20_40); |
| 91 | __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap, |
| 92 | IEEE80211_HT_CAP_SGI_40); |
Ben Greear | ef96a842 | 2011-11-18 11:32:00 -0800 | [diff] [blame] | 93 | |
Ben Greear | bc0784d | 2012-12-12 16:56:20 -0800 | [diff] [blame] | 94 | /* Allow user to disable SGI-20 (SGI-40 is handled above) */ |
Simon Wunderlich | 822854b | 2013-06-28 10:39:59 +0200 | [diff] [blame] | 95 | __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap, |
| 96 | IEEE80211_HT_CAP_SGI_20); |
Ben Greear | bc0784d | 2012-12-12 16:56:20 -0800 | [diff] [blame] | 97 | |
Ben Greear | ef96a842 | 2011-11-18 11:32:00 -0800 | [diff] [blame] | 98 | /* Allow user to disable the max-AMSDU bit. */ |
Simon Wunderlich | 822854b | 2013-06-28 10:39:59 +0200 | [diff] [blame] | 99 | __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap, |
| 100 | IEEE80211_HT_CAP_MAX_AMSDU); |
Ben Greear | ef96a842 | 2011-11-18 11:32:00 -0800 | [diff] [blame] | 101 | |
Pawel Kulakowski | a2e7495 | 2014-04-01 07:13:21 +0200 | [diff] [blame] | 102 | /* Allow user to disable LDPC */ |
| 103 | __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap, |
| 104 | IEEE80211_HT_CAP_LDPC_CODING); |
| 105 | |
Jouni Malinen | 9a07bf5 | 2014-04-15 19:13:56 +0300 | [diff] [blame] | 106 | /* Allow user to enable 40 MHz intolerant bit. */ |
| 107 | __check_htcap_enable(ht_capa, ht_capa_mask, ht_cap, |
| 108 | IEEE80211_HT_CAP_40MHZ_INTOLERANT); |
| 109 | |
Ben Greear | ef96a842 | 2011-11-18 11:32:00 -0800 | [diff] [blame] | 110 | /* Allow user to decrease AMPDU factor */ |
Simon Wunderlich | 822854b | 2013-06-28 10:39:59 +0200 | [diff] [blame] | 111 | if (ht_capa_mask->ampdu_params_info & |
Ben Greear | ef96a842 | 2011-11-18 11:32:00 -0800 | [diff] [blame] | 112 | IEEE80211_HT_AMPDU_PARM_FACTOR) { |
Simon Wunderlich | 822854b | 2013-06-28 10:39:59 +0200 | [diff] [blame] | 113 | u8 n = ht_capa->ampdu_params_info & |
| 114 | IEEE80211_HT_AMPDU_PARM_FACTOR; |
Ben Greear | ef96a842 | 2011-11-18 11:32:00 -0800 | [diff] [blame] | 115 | if (n < ht_cap->ampdu_factor) |
| 116 | ht_cap->ampdu_factor = n; |
| 117 | } |
| 118 | |
| 119 | /* Allow the user to increase AMPDU density. */ |
Simon Wunderlich | 822854b | 2013-06-28 10:39:59 +0200 | [diff] [blame] | 120 | if (ht_capa_mask->ampdu_params_info & |
Ben Greear | ef96a842 | 2011-11-18 11:32:00 -0800 | [diff] [blame] | 121 | IEEE80211_HT_AMPDU_PARM_DENSITY) { |
Simon Wunderlich | 822854b | 2013-06-28 10:39:59 +0200 | [diff] [blame] | 122 | u8 n = (ht_capa->ampdu_params_info & |
Ben Greear | ef96a842 | 2011-11-18 11:32:00 -0800 | [diff] [blame] | 123 | IEEE80211_HT_AMPDU_PARM_DENSITY) |
| 124 | >> IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT; |
| 125 | if (n > ht_cap->ampdu_density) |
| 126 | ht_cap->ampdu_density = n; |
| 127 | } |
| 128 | } |
| 129 | |
| 130 | |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 131 | bool ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata, |
Ben Greear | ef96a842 | 2011-11-18 11:32:00 -0800 | [diff] [blame] | 132 | struct ieee80211_supported_band *sband, |
Johannes Berg | 4a3cb70 | 2013-02-12 16:43:19 +0100 | [diff] [blame] | 133 | const struct ieee80211_ht_cap *ht_cap_ie, |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 134 | struct sta_info *sta) |
Johannes Berg | 44d414d | 2008-09-08 17:44:28 +0200 | [diff] [blame] | 135 | { |
Johannes Berg | c07270b | 2013-03-01 11:54:43 +0100 | [diff] [blame] | 136 | struct ieee80211_sta_ht_cap ht_cap, own_cap; |
Johannes Berg | ae5eb02 | 2008-10-14 16:58:37 +0200 | [diff] [blame] | 137 | u8 ampdu_info, tx_mcs_set_cap; |
| 138 | int i, max_tx_streams; |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 139 | bool changed; |
| 140 | enum ieee80211_sta_rx_bandwidth bw; |
Johannes Berg | af0ed69 | 2013-02-12 14:21:00 +0100 | [diff] [blame] | 141 | enum ieee80211_smps_mode smps_mode; |
Johannes Berg | 44d414d | 2008-09-08 17:44:28 +0200 | [diff] [blame] | 142 | |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 143 | memset(&ht_cap, 0, sizeof(ht_cap)); |
Johannes Berg | 44d414d | 2008-09-08 17:44:28 +0200 | [diff] [blame] | 144 | |
Christian Lamparter | 15804e3 | 2010-07-16 13:01:24 +0200 | [diff] [blame] | 145 | if (!ht_cap_ie || !sband->ht_cap.ht_supported) |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 146 | goto apply; |
Johannes Berg | 44d414d | 2008-09-08 17:44:28 +0200 | [diff] [blame] | 147 | |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 148 | ht_cap.ht_supported = true; |
Johannes Berg | 44d414d | 2008-09-08 17:44:28 +0200 | [diff] [blame] | 149 | |
Johannes Berg | c07270b | 2013-03-01 11:54:43 +0100 | [diff] [blame] | 150 | own_cap = sband->ht_cap; |
| 151 | |
| 152 | /* |
| 153 | * If user has specified capability over-rides, take care |
Arik Nemtsov | 13cc8a4 | 2014-07-17 17:14:26 +0300 | [diff] [blame] | 154 | * of that if the station we're setting up is the AP or TDLS peer that |
Johannes Berg | c07270b | 2013-03-01 11:54:43 +0100 | [diff] [blame] | 155 | * we advertised a restricted capability set to. Override |
| 156 | * our own capabilities and then use those below. |
| 157 | */ |
Arik Nemtsov | 13cc8a4 | 2014-07-17 17:14:26 +0300 | [diff] [blame] | 158 | if (sdata->vif.type == NL80211_IFTYPE_STATION || |
| 159 | sdata->vif.type == NL80211_IFTYPE_ADHOC) |
Johannes Berg | c07270b | 2013-03-01 11:54:43 +0100 | [diff] [blame] | 160 | ieee80211_apply_htcap_overrides(sdata, &own_cap); |
| 161 | |
Johannes Berg | 9a418af | 2009-12-17 13:55:48 +0100 | [diff] [blame] | 162 | /* |
| 163 | * The bits listed in this expression should be |
| 164 | * the same for the peer and us, if the station |
| 165 | * advertises more then we can't use those thus |
| 166 | * we mask them out. |
| 167 | */ |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 168 | ht_cap.cap = le16_to_cpu(ht_cap_ie->cap_info) & |
Johannes Berg | c07270b | 2013-03-01 11:54:43 +0100 | [diff] [blame] | 169 | (own_cap.cap | ~(IEEE80211_HT_CAP_LDPC_CODING | |
| 170 | IEEE80211_HT_CAP_SUP_WIDTH_20_40 | |
| 171 | IEEE80211_HT_CAP_GRN_FLD | |
| 172 | IEEE80211_HT_CAP_SGI_20 | |
| 173 | IEEE80211_HT_CAP_SGI_40 | |
| 174 | IEEE80211_HT_CAP_DSSSCCK40)); |
Johannes Berg | 21add82 | 2012-12-28 15:01:57 +0100 | [diff] [blame] | 175 | |
Johannes Berg | 9a418af | 2009-12-17 13:55:48 +0100 | [diff] [blame] | 176 | /* |
| 177 | * The STBC bits are asymmetric -- if we don't have |
| 178 | * TX then mask out the peer's RX and vice versa. |
| 179 | */ |
Johannes Berg | c07270b | 2013-03-01 11:54:43 +0100 | [diff] [blame] | 180 | if (!(own_cap.cap & IEEE80211_HT_CAP_TX_STBC)) |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 181 | ht_cap.cap &= ~IEEE80211_HT_CAP_RX_STBC; |
Johannes Berg | c07270b | 2013-03-01 11:54:43 +0100 | [diff] [blame] | 182 | if (!(own_cap.cap & IEEE80211_HT_CAP_RX_STBC)) |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 183 | ht_cap.cap &= ~IEEE80211_HT_CAP_TX_STBC; |
Johannes Berg | 44d414d | 2008-09-08 17:44:28 +0200 | [diff] [blame] | 184 | |
Johannes Berg | ae5eb02 | 2008-10-14 16:58:37 +0200 | [diff] [blame] | 185 | ampdu_info = ht_cap_ie->ampdu_params_info; |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 186 | ht_cap.ampdu_factor = |
Johannes Berg | ae5eb02 | 2008-10-14 16:58:37 +0200 | [diff] [blame] | 187 | ampdu_info & IEEE80211_HT_AMPDU_PARM_FACTOR; |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 188 | ht_cap.ampdu_density = |
Johannes Berg | ae5eb02 | 2008-10-14 16:58:37 +0200 | [diff] [blame] | 189 | (ampdu_info & IEEE80211_HT_AMPDU_PARM_DENSITY) >> 2; |
Johannes Berg | d9fe60d | 2008-10-09 12:13:49 +0200 | [diff] [blame] | 190 | |
| 191 | /* own MCS TX capabilities */ |
Johannes Berg | c07270b | 2013-03-01 11:54:43 +0100 | [diff] [blame] | 192 | tx_mcs_set_cap = own_cap.mcs.tx_params; |
Johannes Berg | d9fe60d | 2008-10-09 12:13:49 +0200 | [diff] [blame] | 193 | |
Johannes Berg | 90b4ca9 | 2011-02-25 12:24:10 +0100 | [diff] [blame] | 194 | /* Copy peer MCS TX capabilities, the driver might need them. */ |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 195 | ht_cap.mcs.tx_params = ht_cap_ie->mcs.tx_params; |
Johannes Berg | 90b4ca9 | 2011-02-25 12:24:10 +0100 | [diff] [blame] | 196 | |
Johannes Berg | d9fe60d | 2008-10-09 12:13:49 +0200 | [diff] [blame] | 197 | /* can we TX with MCS rates? */ |
| 198 | if (!(tx_mcs_set_cap & IEEE80211_HT_MCS_TX_DEFINED)) |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 199 | goto apply; |
Johannes Berg | d9fe60d | 2008-10-09 12:13:49 +0200 | [diff] [blame] | 200 | |
| 201 | /* Counting from 0, therefore +1 */ |
| 202 | if (tx_mcs_set_cap & IEEE80211_HT_MCS_TX_RX_DIFF) |
| 203 | max_tx_streams = |
| 204 | ((tx_mcs_set_cap & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK) |
| 205 | >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1; |
| 206 | else |
| 207 | max_tx_streams = IEEE80211_HT_MCS_TX_MAX_STREAMS; |
| 208 | |
| 209 | /* |
Johannes Berg | 90b4ca9 | 2011-02-25 12:24:10 +0100 | [diff] [blame] | 210 | * 802.11n-2009 20.3.5 / 20.6 says: |
Johannes Berg | d9fe60d | 2008-10-09 12:13:49 +0200 | [diff] [blame] | 211 | * - indices 0 to 7 and 32 are single spatial stream |
| 212 | * - 8 to 31 are multiple spatial streams using equal modulation |
| 213 | * [8..15 for two streams, 16..23 for three and 24..31 for four] |
| 214 | * - remainder are multiple spatial streams using unequal modulation |
| 215 | */ |
| 216 | for (i = 0; i < max_tx_streams; i++) |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 217 | ht_cap.mcs.rx_mask[i] = |
Johannes Berg | c07270b | 2013-03-01 11:54:43 +0100 | [diff] [blame] | 218 | own_cap.mcs.rx_mask[i] & ht_cap_ie->mcs.rx_mask[i]; |
Johannes Berg | d9fe60d | 2008-10-09 12:13:49 +0200 | [diff] [blame] | 219 | |
| 220 | if (tx_mcs_set_cap & IEEE80211_HT_MCS_TX_UNEQUAL_MODULATION) |
| 221 | for (i = IEEE80211_HT_MCS_UNEQUAL_MODULATION_START_BYTE; |
| 222 | i < IEEE80211_HT_MCS_MASK_LEN; i++) |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 223 | ht_cap.mcs.rx_mask[i] = |
Johannes Berg | c07270b | 2013-03-01 11:54:43 +0100 | [diff] [blame] | 224 | own_cap.mcs.rx_mask[i] & |
Johannes Berg | ae5eb02 | 2008-10-14 16:58:37 +0200 | [diff] [blame] | 225 | ht_cap_ie->mcs.rx_mask[i]; |
Johannes Berg | d9fe60d | 2008-10-09 12:13:49 +0200 | [diff] [blame] | 226 | |
| 227 | /* handle MCS rate 32 too */ |
Johannes Berg | c07270b | 2013-03-01 11:54:43 +0100 | [diff] [blame] | 228 | if (own_cap.mcs.rx_mask[32/8] & ht_cap_ie->mcs.rx_mask[32/8] & 1) |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 229 | ht_cap.mcs.rx_mask[32/8] |= 1; |
Ben Greear | ef96a842 | 2011-11-18 11:32:00 -0800 | [diff] [blame] | 230 | |
Arik Nemtsov | dc5943d | 2014-07-17 17:14:27 +0300 | [diff] [blame] | 231 | /* set Rx highest rate */ |
| 232 | ht_cap.mcs.rx_highest = ht_cap_ie->mcs.rx_highest; |
| 233 | |
Emmanuel Grumbach | 506bcfa | 2015-12-13 15:41:05 +0200 | [diff] [blame] | 234 | if (ht_cap.cap & IEEE80211_HT_CAP_MAX_AMSDU) |
| 235 | sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_HT_7935; |
| 236 | else |
| 237 | sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_HT_3839; |
| 238 | |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 239 | apply: |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 240 | changed = memcmp(&sta->sta.ht_cap, &ht_cap, sizeof(ht_cap)); |
| 241 | |
| 242 | memcpy(&sta->sta.ht_cap, &ht_cap, sizeof(ht_cap)); |
| 243 | |
| 244 | switch (sdata->vif.bss_conf.chandef.width) { |
| 245 | default: |
| 246 | WARN_ON_ONCE(1); |
| 247 | /* fall through */ |
| 248 | case NL80211_CHAN_WIDTH_20_NOHT: |
| 249 | case NL80211_CHAN_WIDTH_20: |
| 250 | bw = IEEE80211_STA_RX_BW_20; |
| 251 | break; |
| 252 | case NL80211_CHAN_WIDTH_40: |
| 253 | case NL80211_CHAN_WIDTH_80: |
| 254 | case NL80211_CHAN_WIDTH_80P80: |
| 255 | case NL80211_CHAN_WIDTH_160: |
| 256 | bw = ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? |
| 257 | IEEE80211_STA_RX_BW_40 : IEEE80211_STA_RX_BW_20; |
| 258 | break; |
| 259 | } |
| 260 | |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 261 | sta->sta.bandwidth = bw; |
| 262 | |
Johannes Berg | 0af83d3 | 2012-12-27 18:55:36 +0100 | [diff] [blame] | 263 | sta->cur_max_bandwidth = |
| 264 | ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? |
| 265 | IEEE80211_STA_RX_BW_40 : IEEE80211_STA_RX_BW_20; |
| 266 | |
Johannes Berg | af0ed69 | 2013-02-12 14:21:00 +0100 | [diff] [blame] | 267 | switch ((ht_cap.cap & IEEE80211_HT_CAP_SM_PS) |
| 268 | >> IEEE80211_HT_CAP_SM_PS_SHIFT) { |
| 269 | case WLAN_HT_CAP_SM_PS_INVALID: |
| 270 | case WLAN_HT_CAP_SM_PS_STATIC: |
| 271 | smps_mode = IEEE80211_SMPS_STATIC; |
| 272 | break; |
| 273 | case WLAN_HT_CAP_SM_PS_DYNAMIC: |
| 274 | smps_mode = IEEE80211_SMPS_DYNAMIC; |
| 275 | break; |
| 276 | case WLAN_HT_CAP_SM_PS_DISABLED: |
| 277 | smps_mode = IEEE80211_SMPS_OFF; |
| 278 | break; |
| 279 | } |
| 280 | |
| 281 | if (smps_mode != sta->sta.smps_mode) |
| 282 | changed = true; |
| 283 | sta->sta.smps_mode = smps_mode; |
| 284 | |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 285 | return changed; |
Johannes Berg | ae5eb02 | 2008-10-14 16:58:37 +0200 | [diff] [blame] | 286 | } |
Johannes Berg | d9fe60d | 2008-10-09 12:13:49 +0200 | [diff] [blame] | 287 | |
Johannes Berg | c82c4a8 | 2012-07-18 13:31:31 +0200 | [diff] [blame] | 288 | void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta, |
| 289 | enum ieee80211_agg_stop_reason reason) |
Johannes Berg | 44d414d | 2008-09-08 17:44:28 +0200 | [diff] [blame] | 290 | { |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 291 | int i; |
Johannes Berg | 44d414d | 2008-09-08 17:44:28 +0200 | [diff] [blame] | 292 | |
Johannes Berg | 5a306f5 | 2012-11-14 23:22:21 +0100 | [diff] [blame] | 293 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) { |
Johannes Berg | c82c4a8 | 2012-07-18 13:31:31 +0200 | [diff] [blame] | 294 | __ieee80211_stop_tx_ba_session(sta, i, reason); |
Johannes Berg | 849b796 | 2009-02-10 21:25:54 +0100 | [diff] [blame] | 295 | __ieee80211_stop_rx_ba_session(sta, i, WLAN_BACK_RECIPIENT, |
Johannes Berg | c82c4a8 | 2012-07-18 13:31:31 +0200 | [diff] [blame] | 296 | WLAN_REASON_QSTA_LEAVE_QBSS, |
| 297 | reason != AGG_STOP_DESTROY_STA && |
| 298 | reason != AGG_STOP_PEER_REQUEST); |
Johannes Berg | 44d414d | 2008-09-08 17:44:28 +0200 | [diff] [blame] | 299 | } |
Johannes Berg | fd500b3 | 2017-05-27 00:27:25 +0200 | [diff] [blame^] | 300 | |
| 301 | /* stopping might queue the work again - so cancel only afterwards */ |
| 302 | cancel_work_sync(&sta->ampdu_mlme.work); |
Johannes Berg | 44d414d | 2008-09-08 17:44:28 +0200 | [diff] [blame] | 303 | } |
| 304 | |
Johannes Berg | 67c282c | 2010-06-10 10:21:43 +0200 | [diff] [blame] | 305 | void ieee80211_ba_session_work(struct work_struct *work) |
| 306 | { |
| 307 | struct sta_info *sta = |
| 308 | container_of(work, struct sta_info, ampdu_mlme.work); |
| 309 | struct tid_ampdu_tx *tid_tx; |
| 310 | int tid; |
| 311 | |
| 312 | /* |
| 313 | * When this flag is set, new sessions should be |
| 314 | * blocked, and existing sessions will be torn |
| 315 | * down by the code that set the flag, so this |
| 316 | * need not run. |
| 317 | */ |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 318 | if (test_sta_flag(sta, WLAN_STA_BLOCK_BA)) |
Johannes Berg | 67c282c | 2010-06-10 10:21:43 +0200 | [diff] [blame] | 319 | return; |
| 320 | |
Johannes Berg | a93e364 | 2010-06-10 10:21:46 +0200 | [diff] [blame] | 321 | mutex_lock(&sta->ampdu_mlme.mtx); |
Johannes Berg | 5a306f5 | 2012-11-14 23:22:21 +0100 | [diff] [blame] | 322 | for (tid = 0; tid < IEEE80211_NUM_TIDS; tid++) { |
Johannes Berg | 7c3b1dd | 2010-06-10 10:21:44 +0200 | [diff] [blame] | 323 | if (test_and_clear_bit(tid, sta->ampdu_mlme.tid_rx_timer_expired)) |
| 324 | ___ieee80211_stop_rx_ba_session( |
| 325 | sta, tid, WLAN_BACK_RECIPIENT, |
Johannes Berg | 53f73c0 | 2010-10-05 19:37:40 +0200 | [diff] [blame] | 326 | WLAN_REASON_QSTA_TIMEOUT, true); |
Johannes Berg | 7c3b1dd | 2010-06-10 10:21:44 +0200 | [diff] [blame] | 327 | |
Shahar Levi | f41ccd7 | 2011-05-22 16:10:21 +0300 | [diff] [blame] | 328 | if (test_and_clear_bit(tid, |
| 329 | sta->ampdu_mlme.tid_rx_stop_requested)) |
| 330 | ___ieee80211_stop_rx_ba_session( |
| 331 | sta, tid, WLAN_BACK_RECIPIENT, |
| 332 | WLAN_REASON_UNSPECIFIED, true); |
| 333 | |
Ben Greear | e562078 | 2013-06-12 14:08:44 -0700 | [diff] [blame] | 334 | spin_lock_bh(&sta->lock); |
| 335 | |
Johannes Berg | ec034b2 | 2011-05-13 13:35:40 +0200 | [diff] [blame] | 336 | tid_tx = sta->ampdu_mlme.tid_start_tx[tid]; |
| 337 | if (tid_tx) { |
| 338 | /* |
| 339 | * Assign it over to the normal tid_tx array |
| 340 | * where it "goes live". |
| 341 | */ |
Johannes Berg | 67c282c | 2010-06-10 10:21:43 +0200 | [diff] [blame] | 342 | |
Johannes Berg | ec034b2 | 2011-05-13 13:35:40 +0200 | [diff] [blame] | 343 | sta->ampdu_mlme.tid_start_tx[tid] = NULL; |
| 344 | /* could there be a race? */ |
| 345 | if (sta->ampdu_mlme.tid_tx[tid]) |
| 346 | kfree(tid_tx); |
| 347 | else |
| 348 | ieee80211_assign_tid_tx(sta, tid, tid_tx); |
| 349 | spin_unlock_bh(&sta->lock); |
| 350 | |
Johannes Berg | 67c282c | 2010-06-10 10:21:43 +0200 | [diff] [blame] | 351 | ieee80211_tx_ba_session_handle_start(sta, tid); |
Johannes Berg | ec034b2 | 2011-05-13 13:35:40 +0200 | [diff] [blame] | 352 | continue; |
| 353 | } |
Ben Greear | e562078 | 2013-06-12 14:08:44 -0700 | [diff] [blame] | 354 | spin_unlock_bh(&sta->lock); |
Johannes Berg | ec034b2 | 2011-05-13 13:35:40 +0200 | [diff] [blame] | 355 | |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 356 | tid_tx = rcu_dereference_protected_tid_tx(sta, tid); |
Johannes Berg | fd500b3 | 2017-05-27 00:27:25 +0200 | [diff] [blame^] | 357 | if (!tid_tx) |
| 358 | continue; |
| 359 | |
| 360 | if (test_and_clear_bit(HT_AGG_STATE_START_CB, &tid_tx->state)) |
| 361 | ieee80211_start_tx_ba_cb(sta, tid, tid_tx); |
| 362 | if (test_and_clear_bit(HT_AGG_STATE_WANT_STOP, &tid_tx->state)) |
Johannes Berg | 67c282c | 2010-06-10 10:21:43 +0200 | [diff] [blame] | 363 | ___ieee80211_stop_tx_ba_session(sta, tid, |
Johannes Berg | c82c4a8 | 2012-07-18 13:31:31 +0200 | [diff] [blame] | 364 | AGG_STOP_LOCAL_REQUEST); |
Johannes Berg | fd500b3 | 2017-05-27 00:27:25 +0200 | [diff] [blame^] | 365 | if (test_and_clear_bit(HT_AGG_STATE_STOP_CB, &tid_tx->state)) |
| 366 | ieee80211_stop_tx_ba_cb(sta, tid, tid_tx); |
Johannes Berg | 67c282c | 2010-06-10 10:21:43 +0200 | [diff] [blame] | 367 | } |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 368 | mutex_unlock(&sta->ampdu_mlme.mtx); |
Johannes Berg | 67c282c | 2010-06-10 10:21:43 +0200 | [diff] [blame] | 369 | } |
| 370 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 371 | void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata, |
| 372 | const u8 *da, u16 tid, |
| 373 | u16 initiator, u16 reason_code) |
Johannes Berg | 44d414d | 2008-09-08 17:44:28 +0200 | [diff] [blame] | 374 | { |
| 375 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | 44d414d | 2008-09-08 17:44:28 +0200 | [diff] [blame] | 376 | struct sk_buff *skb; |
| 377 | struct ieee80211_mgmt *mgmt; |
| 378 | u16 params; |
| 379 | |
| 380 | skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom); |
Joe Perches | d15b845 | 2011-08-29 14:17:31 -0700 | [diff] [blame] | 381 | if (!skb) |
Johannes Berg | 44d414d | 2008-09-08 17:44:28 +0200 | [diff] [blame] | 382 | return; |
Johannes Berg | 44d414d | 2008-09-08 17:44:28 +0200 | [diff] [blame] | 383 | |
| 384 | skb_reserve(skb, local->hw.extra_tx_headroom); |
| 385 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); |
| 386 | memset(mgmt, 0, 24); |
| 387 | memcpy(mgmt->da, da, ETH_ALEN); |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 388 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
Johannes Berg | 8abd3f9 | 2009-02-10 21:25:47 +0100 | [diff] [blame] | 389 | if (sdata->vif.type == NL80211_IFTYPE_AP || |
Thomas Pedersen | ae2772b | 2011-10-26 14:47:29 -0700 | [diff] [blame] | 390 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN || |
| 391 | sdata->vif.type == NL80211_IFTYPE_MESH_POINT) |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 392 | memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 393 | else if (sdata->vif.type == NL80211_IFTYPE_STATION) |
| 394 | memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN); |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 395 | else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) |
| 396 | memcpy(mgmt->bssid, sdata->u.ibss.bssid, ETH_ALEN); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 397 | |
Johannes Berg | 44d414d | 2008-09-08 17:44:28 +0200 | [diff] [blame] | 398 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| 399 | IEEE80211_STYPE_ACTION); |
| 400 | |
| 401 | skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba)); |
| 402 | |
| 403 | mgmt->u.action.category = WLAN_CATEGORY_BACK; |
| 404 | mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA; |
| 405 | params = (u16)(initiator << 11); /* bit 11 initiator */ |
| 406 | params |= (u16)(tid << 12); /* bit 15:12 TID number */ |
| 407 | |
| 408 | mgmt->u.action.u.delba.params = cpu_to_le16(params); |
| 409 | mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code); |
| 410 | |
Karl Beldan | c6e1332 | 2014-01-23 20:06:34 +0100 | [diff] [blame] | 411 | ieee80211_tx_skb(sdata, skb); |
Johannes Berg | 44d414d | 2008-09-08 17:44:28 +0200 | [diff] [blame] | 412 | } |
| 413 | |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 414 | void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata, |
| 415 | struct sta_info *sta, |
| 416 | struct ieee80211_mgmt *mgmt, size_t len) |
| 417 | { |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 418 | u16 tid, params; |
| 419 | u16 initiator; |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 420 | |
| 421 | params = le16_to_cpu(mgmt->u.action.u.delba.params); |
| 422 | tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12; |
| 423 | initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11; |
| 424 | |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 425 | ht_dbg_ratelimited(sdata, "delba from %pM (%s) tid %d reason code %d\n", |
| 426 | mgmt->sa, initiator ? "initiator" : "recipient", |
| 427 | tid, |
| 428 | le16_to_cpu(mgmt->u.action.u.delba.reason_code)); |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 429 | |
| 430 | if (initiator == WLAN_BACK_INITIATOR) |
Johannes Berg | 53f73c0 | 2010-10-05 19:37:40 +0200 | [diff] [blame] | 431 | __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_INITIATOR, 0, |
| 432 | true); |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 433 | else |
Johannes Berg | c82c4a8 | 2012-07-18 13:31:31 +0200 | [diff] [blame] | 434 | __ieee80211_stop_tx_ba_session(sta, tid, AGG_STOP_PEER_REQUEST); |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 435 | } |
Johannes Berg | 0f78231 | 2009-12-01 13:37:02 +0100 | [diff] [blame] | 436 | |
| 437 | int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata, |
| 438 | enum ieee80211_smps_mode smps, const u8 *da, |
| 439 | const u8 *bssid) |
| 440 | { |
| 441 | struct ieee80211_local *local = sdata->local; |
| 442 | struct sk_buff *skb; |
| 443 | struct ieee80211_mgmt *action_frame; |
| 444 | |
| 445 | /* 27 = header + category + action + smps mode */ |
| 446 | skb = dev_alloc_skb(27 + local->hw.extra_tx_headroom); |
| 447 | if (!skb) |
| 448 | return -ENOMEM; |
| 449 | |
| 450 | skb_reserve(skb, local->hw.extra_tx_headroom); |
| 451 | action_frame = (void *)skb_put(skb, 27); |
| 452 | memcpy(action_frame->da, da, ETH_ALEN); |
| 453 | memcpy(action_frame->sa, sdata->dev->dev_addr, ETH_ALEN); |
| 454 | memcpy(action_frame->bssid, bssid, ETH_ALEN); |
| 455 | action_frame->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| 456 | IEEE80211_STYPE_ACTION); |
| 457 | action_frame->u.action.category = WLAN_CATEGORY_HT; |
| 458 | action_frame->u.action.u.ht_smps.action = WLAN_HT_ACTION_SMPS; |
| 459 | switch (smps) { |
| 460 | case IEEE80211_SMPS_AUTOMATIC: |
| 461 | case IEEE80211_SMPS_NUM_MODES: |
| 462 | WARN_ON(1); |
| 463 | case IEEE80211_SMPS_OFF: |
| 464 | action_frame->u.action.u.ht_smps.smps_control = |
| 465 | WLAN_HT_SMPS_CONTROL_DISABLED; |
| 466 | break; |
| 467 | case IEEE80211_SMPS_STATIC: |
| 468 | action_frame->u.action.u.ht_smps.smps_control = |
| 469 | WLAN_HT_SMPS_CONTROL_STATIC; |
| 470 | break; |
| 471 | case IEEE80211_SMPS_DYNAMIC: |
| 472 | action_frame->u.action.u.ht_smps.smps_control = |
| 473 | WLAN_HT_SMPS_CONTROL_DYNAMIC; |
| 474 | break; |
| 475 | } |
| 476 | |
| 477 | /* we'll do more on status of this frame */ |
| 478 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; |
| 479 | ieee80211_tx_skb(sdata, skb); |
| 480 | |
| 481 | return 0; |
| 482 | } |
Johannes Berg | d1f5b7a | 2010-08-05 17:05:55 +0200 | [diff] [blame] | 483 | |
Emmanuel Grumbach | 687da13 | 2013-10-01 16:45:43 +0300 | [diff] [blame] | 484 | void ieee80211_request_smps_mgd_work(struct work_struct *work) |
Johannes Berg | d1f5b7a | 2010-08-05 17:05:55 +0200 | [diff] [blame] | 485 | { |
| 486 | struct ieee80211_sub_if_data *sdata = |
| 487 | container_of(work, struct ieee80211_sub_if_data, |
| 488 | u.mgd.request_smps_work); |
| 489 | |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 490 | sdata_lock(sdata); |
Emmanuel Grumbach | 687da13 | 2013-10-01 16:45:43 +0300 | [diff] [blame] | 491 | __ieee80211_request_smps_mgd(sdata, sdata->u.mgd.driver_smps_mode); |
| 492 | sdata_unlock(sdata); |
| 493 | } |
| 494 | |
| 495 | void ieee80211_request_smps_ap_work(struct work_struct *work) |
| 496 | { |
| 497 | struct ieee80211_sub_if_data *sdata = |
| 498 | container_of(work, struct ieee80211_sub_if_data, |
| 499 | u.ap.request_smps_work); |
| 500 | |
| 501 | sdata_lock(sdata); |
Emmanuel Grumbach | 8ffcc70 | 2014-01-23 14:28:16 +0200 | [diff] [blame] | 502 | if (sdata_dereference(sdata->u.ap.beacon, sdata)) |
| 503 | __ieee80211_request_smps_ap(sdata, |
| 504 | sdata->u.ap.driver_smps_mode); |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 505 | sdata_unlock(sdata); |
Johannes Berg | d1f5b7a | 2010-08-05 17:05:55 +0200 | [diff] [blame] | 506 | } |
| 507 | |
| 508 | void ieee80211_request_smps(struct ieee80211_vif *vif, |
| 509 | enum ieee80211_smps_mode smps_mode) |
| 510 | { |
| 511 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
| 512 | |
Emmanuel Grumbach | 687da13 | 2013-10-01 16:45:43 +0300 | [diff] [blame] | 513 | if (WARN_ON_ONCE(vif->type != NL80211_IFTYPE_STATION && |
| 514 | vif->type != NL80211_IFTYPE_AP)) |
Johannes Berg | d1f5b7a | 2010-08-05 17:05:55 +0200 | [diff] [blame] | 515 | return; |
| 516 | |
Emmanuel Grumbach | 687da13 | 2013-10-01 16:45:43 +0300 | [diff] [blame] | 517 | if (vif->type == NL80211_IFTYPE_STATION) { |
| 518 | if (sdata->u.mgd.driver_smps_mode == smps_mode) |
| 519 | return; |
| 520 | sdata->u.mgd.driver_smps_mode = smps_mode; |
| 521 | ieee80211_queue_work(&sdata->local->hw, |
| 522 | &sdata->u.mgd.request_smps_work); |
| 523 | } else { |
| 524 | /* AUTOMATIC is meaningless in AP mode */ |
| 525 | if (WARN_ON_ONCE(smps_mode == IEEE80211_SMPS_AUTOMATIC)) |
| 526 | return; |
| 527 | if (sdata->u.ap.driver_smps_mode == smps_mode) |
| 528 | return; |
| 529 | sdata->u.ap.driver_smps_mode = smps_mode; |
| 530 | ieee80211_queue_work(&sdata->local->hw, |
| 531 | &sdata->u.ap.request_smps_work); |
| 532 | } |
Johannes Berg | d1f5b7a | 2010-08-05 17:05:55 +0200 | [diff] [blame] | 533 | } |
| 534 | /* this might change ... don't want non-open drivers using it */ |
| 535 | EXPORT_SYMBOL_GPL(ieee80211_request_smps); |