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 | 44d414d | 2008-09-08 17:44:28 +0200 | [diff] [blame] | 10 | * |
| 11 | * This program is free software; you can redistribute it and/or modify |
| 12 | * it under the terms of the GNU General Public License version 2 as |
| 13 | * published by the Free Software Foundation. |
| 14 | */ |
| 15 | |
| 16 | #include <linux/ieee80211.h> |
Paul Gortmaker | bc3b2d7 | 2011-07-15 11:47:34 -0400 | [diff] [blame] | 17 | #include <linux/export.h> |
Johannes Berg | 44d414d | 2008-09-08 17:44:28 +0200 | [diff] [blame] | 18 | #include <net/mac80211.h> |
| 19 | #include "ieee80211_i.h" |
Sujith | 81cb762 | 2009-02-12 11:38:37 +0530 | [diff] [blame] | 20 | #include "rate.h" |
Johannes Berg | 44d414d | 2008-09-08 17:44:28 +0200 | [diff] [blame] | 21 | |
Ben Greear | 32dfefa | 2011-11-24 11:15:21 -0800 | [diff] [blame] | 22 | static void __check_htcap_disable(struct ieee80211_sub_if_data *sdata, |
| 23 | struct ieee80211_sta_ht_cap *ht_cap, |
| 24 | u16 flag) |
Ben Greear | ef96a842 | 2011-11-18 11:32:00 -0800 | [diff] [blame] | 25 | { |
| 26 | __le16 le_flag = cpu_to_le16(flag); |
| 27 | if (sdata->u.mgd.ht_capa_mask.cap_info & le_flag) { |
| 28 | if (!(sdata->u.mgd.ht_capa.cap_info & le_flag)) |
| 29 | ht_cap->cap &= ~flag; |
| 30 | } |
| 31 | } |
| 32 | |
| 33 | void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata, |
| 34 | struct ieee80211_sta_ht_cap *ht_cap) |
| 35 | { |
| 36 | u8 *scaps = (u8 *)(&sdata->u.mgd.ht_capa.mcs.rx_mask); |
| 37 | u8 *smask = (u8 *)(&sdata->u.mgd.ht_capa_mask.mcs.rx_mask); |
| 38 | int i; |
| 39 | |
| 40 | if (sdata->vif.type != NL80211_IFTYPE_STATION) { |
Ben Greear | 4e79fad | 2011-12-05 11:15:55 -0800 | [diff] [blame] | 41 | /* AP interfaces call this code when adding new stations, |
| 42 | * so just silently ignore non station interfaces. |
| 43 | */ |
Ben Greear | ef96a842 | 2011-11-18 11:32:00 -0800 | [diff] [blame] | 44 | return; |
| 45 | } |
| 46 | |
| 47 | /* NOTE: If you add more over-rides here, update register_hw |
| 48 | * ht_capa_mod_msk logic in main.c as well. |
| 49 | * And, if this method can ever change ht_cap.ht_supported, fix |
| 50 | * the check in ieee80211_add_ht_ie. |
| 51 | */ |
| 52 | |
| 53 | /* check for HT over-rides, MCS rates first. */ |
| 54 | for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) { |
| 55 | u8 m = smask[i]; |
| 56 | ht_cap->mcs.rx_mask[i] &= ~m; /* turn off all masked bits */ |
| 57 | /* Add back rates that are supported */ |
| 58 | ht_cap->mcs.rx_mask[i] |= (m & scaps[i]); |
| 59 | } |
| 60 | |
| 61 | /* Force removal of HT-40 capabilities? */ |
| 62 | __check_htcap_disable(sdata, ht_cap, IEEE80211_HT_CAP_SUP_WIDTH_20_40); |
| 63 | __check_htcap_disable(sdata, ht_cap, IEEE80211_HT_CAP_SGI_40); |
| 64 | |
Ben Greear | bc0784d | 2012-12-12 16:56:20 -0800 | [diff] [blame^] | 65 | /* Allow user to disable SGI-20 (SGI-40 is handled above) */ |
| 66 | __check_htcap_disable(sdata, ht_cap, IEEE80211_HT_CAP_SGI_20); |
| 67 | |
Ben Greear | ef96a842 | 2011-11-18 11:32:00 -0800 | [diff] [blame] | 68 | /* Allow user to disable the max-AMSDU bit. */ |
| 69 | __check_htcap_disable(sdata, ht_cap, IEEE80211_HT_CAP_MAX_AMSDU); |
| 70 | |
| 71 | /* Allow user to decrease AMPDU factor */ |
| 72 | if (sdata->u.mgd.ht_capa_mask.ampdu_params_info & |
| 73 | IEEE80211_HT_AMPDU_PARM_FACTOR) { |
| 74 | u8 n = sdata->u.mgd.ht_capa.ampdu_params_info |
| 75 | & IEEE80211_HT_AMPDU_PARM_FACTOR; |
| 76 | if (n < ht_cap->ampdu_factor) |
| 77 | ht_cap->ampdu_factor = n; |
| 78 | } |
| 79 | |
| 80 | /* Allow the user to increase AMPDU density. */ |
| 81 | if (sdata->u.mgd.ht_capa_mask.ampdu_params_info & |
| 82 | IEEE80211_HT_AMPDU_PARM_DENSITY) { |
| 83 | u8 n = (sdata->u.mgd.ht_capa.ampdu_params_info & |
| 84 | IEEE80211_HT_AMPDU_PARM_DENSITY) |
| 85 | >> IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT; |
| 86 | if (n > ht_cap->ampdu_density) |
| 87 | ht_cap->ampdu_density = n; |
| 88 | } |
| 89 | } |
| 90 | |
| 91 | |
| 92 | void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata, |
| 93 | struct ieee80211_supported_band *sband, |
Johannes Berg | ae5eb02 | 2008-10-14 16:58:37 +0200 | [diff] [blame] | 94 | struct ieee80211_ht_cap *ht_cap_ie, |
Johannes Berg | d9fe60d | 2008-10-09 12:13:49 +0200 | [diff] [blame] | 95 | struct ieee80211_sta_ht_cap *ht_cap) |
Johannes Berg | 44d414d | 2008-09-08 17:44:28 +0200 | [diff] [blame] | 96 | { |
Johannes Berg | ae5eb02 | 2008-10-14 16:58:37 +0200 | [diff] [blame] | 97 | u8 ampdu_info, tx_mcs_set_cap; |
| 98 | int i, max_tx_streams; |
Johannes Berg | 44d414d | 2008-09-08 17:44:28 +0200 | [diff] [blame] | 99 | |
Johannes Berg | d9fe60d | 2008-10-09 12:13:49 +0200 | [diff] [blame] | 100 | BUG_ON(!ht_cap); |
Johannes Berg | 44d414d | 2008-09-08 17:44:28 +0200 | [diff] [blame] | 101 | |
Johannes Berg | d9fe60d | 2008-10-09 12:13:49 +0200 | [diff] [blame] | 102 | memset(ht_cap, 0, sizeof(*ht_cap)); |
Johannes Berg | 44d414d | 2008-09-08 17:44:28 +0200 | [diff] [blame] | 103 | |
Christian Lamparter | 15804e3 | 2010-07-16 13:01:24 +0200 | [diff] [blame] | 104 | if (!ht_cap_ie || !sband->ht_cap.ht_supported) |
Johannes Berg | ae5eb02 | 2008-10-14 16:58:37 +0200 | [diff] [blame] | 105 | return; |
Johannes Berg | 44d414d | 2008-09-08 17:44:28 +0200 | [diff] [blame] | 106 | |
Johannes Berg | ae5eb02 | 2008-10-14 16:58:37 +0200 | [diff] [blame] | 107 | ht_cap->ht_supported = true; |
Johannes Berg | 44d414d | 2008-09-08 17:44:28 +0200 | [diff] [blame] | 108 | |
Johannes Berg | 9a418af | 2009-12-17 13:55:48 +0100 | [diff] [blame] | 109 | /* |
| 110 | * The bits listed in this expression should be |
| 111 | * the same for the peer and us, if the station |
| 112 | * advertises more then we can't use those thus |
| 113 | * we mask them out. |
| 114 | */ |
| 115 | ht_cap->cap = le16_to_cpu(ht_cap_ie->cap_info) & |
| 116 | (sband->ht_cap.cap | |
| 117 | ~(IEEE80211_HT_CAP_LDPC_CODING | |
| 118 | IEEE80211_HT_CAP_SUP_WIDTH_20_40 | |
| 119 | IEEE80211_HT_CAP_GRN_FLD | |
| 120 | IEEE80211_HT_CAP_SGI_20 | |
| 121 | IEEE80211_HT_CAP_SGI_40 | |
| 122 | IEEE80211_HT_CAP_DSSSCCK40)); |
| 123 | /* |
| 124 | * The STBC bits are asymmetric -- if we don't have |
| 125 | * TX then mask out the peer's RX and vice versa. |
| 126 | */ |
| 127 | if (!(sband->ht_cap.cap & IEEE80211_HT_CAP_TX_STBC)) |
| 128 | ht_cap->cap &= ~IEEE80211_HT_CAP_RX_STBC; |
| 129 | if (!(sband->ht_cap.cap & IEEE80211_HT_CAP_RX_STBC)) |
| 130 | ht_cap->cap &= ~IEEE80211_HT_CAP_TX_STBC; |
Johannes Berg | 44d414d | 2008-09-08 17:44:28 +0200 | [diff] [blame] | 131 | |
Johannes Berg | ae5eb02 | 2008-10-14 16:58:37 +0200 | [diff] [blame] | 132 | ampdu_info = ht_cap_ie->ampdu_params_info; |
| 133 | ht_cap->ampdu_factor = |
| 134 | ampdu_info & IEEE80211_HT_AMPDU_PARM_FACTOR; |
| 135 | ht_cap->ampdu_density = |
| 136 | (ampdu_info & IEEE80211_HT_AMPDU_PARM_DENSITY) >> 2; |
Johannes Berg | d9fe60d | 2008-10-09 12:13:49 +0200 | [diff] [blame] | 137 | |
| 138 | /* own MCS TX capabilities */ |
| 139 | tx_mcs_set_cap = sband->ht_cap.mcs.tx_params; |
| 140 | |
Johannes Berg | 90b4ca9 | 2011-02-25 12:24:10 +0100 | [diff] [blame] | 141 | /* Copy peer MCS TX capabilities, the driver might need them. */ |
| 142 | ht_cap->mcs.tx_params = ht_cap_ie->mcs.tx_params; |
| 143 | |
Johannes Berg | d9fe60d | 2008-10-09 12:13:49 +0200 | [diff] [blame] | 144 | /* can we TX with MCS rates? */ |
| 145 | if (!(tx_mcs_set_cap & IEEE80211_HT_MCS_TX_DEFINED)) |
Johannes Berg | ae5eb02 | 2008-10-14 16:58:37 +0200 | [diff] [blame] | 146 | return; |
Johannes Berg | d9fe60d | 2008-10-09 12:13:49 +0200 | [diff] [blame] | 147 | |
| 148 | /* Counting from 0, therefore +1 */ |
| 149 | if (tx_mcs_set_cap & IEEE80211_HT_MCS_TX_RX_DIFF) |
| 150 | max_tx_streams = |
| 151 | ((tx_mcs_set_cap & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK) |
| 152 | >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1; |
| 153 | else |
| 154 | max_tx_streams = IEEE80211_HT_MCS_TX_MAX_STREAMS; |
| 155 | |
| 156 | /* |
Johannes Berg | 90b4ca9 | 2011-02-25 12:24:10 +0100 | [diff] [blame] | 157 | * 802.11n-2009 20.3.5 / 20.6 says: |
Johannes Berg | d9fe60d | 2008-10-09 12:13:49 +0200 | [diff] [blame] | 158 | * - indices 0 to 7 and 32 are single spatial stream |
| 159 | * - 8 to 31 are multiple spatial streams using equal modulation |
| 160 | * [8..15 for two streams, 16..23 for three and 24..31 for four] |
| 161 | * - remainder are multiple spatial streams using unequal modulation |
| 162 | */ |
| 163 | for (i = 0; i < max_tx_streams; i++) |
Johannes Berg | ae5eb02 | 2008-10-14 16:58:37 +0200 | [diff] [blame] | 164 | ht_cap->mcs.rx_mask[i] = |
| 165 | sband->ht_cap.mcs.rx_mask[i] & ht_cap_ie->mcs.rx_mask[i]; |
Johannes Berg | d9fe60d | 2008-10-09 12:13:49 +0200 | [diff] [blame] | 166 | |
| 167 | if (tx_mcs_set_cap & IEEE80211_HT_MCS_TX_UNEQUAL_MODULATION) |
| 168 | for (i = IEEE80211_HT_MCS_UNEQUAL_MODULATION_START_BYTE; |
| 169 | i < IEEE80211_HT_MCS_MASK_LEN; i++) |
Johannes Berg | ae5eb02 | 2008-10-14 16:58:37 +0200 | [diff] [blame] | 170 | ht_cap->mcs.rx_mask[i] = |
Johannes Berg | d9fe60d | 2008-10-09 12:13:49 +0200 | [diff] [blame] | 171 | sband->ht_cap.mcs.rx_mask[i] & |
Johannes Berg | ae5eb02 | 2008-10-14 16:58:37 +0200 | [diff] [blame] | 172 | ht_cap_ie->mcs.rx_mask[i]; |
Johannes Berg | d9fe60d | 2008-10-09 12:13:49 +0200 | [diff] [blame] | 173 | |
| 174 | /* handle MCS rate 32 too */ |
Johannes Berg | ae5eb02 | 2008-10-14 16:58:37 +0200 | [diff] [blame] | 175 | if (sband->ht_cap.mcs.rx_mask[32/8] & ht_cap_ie->mcs.rx_mask[32/8] & 1) |
| 176 | ht_cap->mcs.rx_mask[32/8] |= 1; |
Ben Greear | ef96a842 | 2011-11-18 11:32:00 -0800 | [diff] [blame] | 177 | |
| 178 | /* |
| 179 | * If user has specified capability over-rides, take care |
| 180 | * of that here. |
| 181 | */ |
| 182 | ieee80211_apply_htcap_overrides(sdata, ht_cap); |
Johannes Berg | ae5eb02 | 2008-10-14 16:58:37 +0200 | [diff] [blame] | 183 | } |
Johannes Berg | d9fe60d | 2008-10-09 12:13:49 +0200 | [diff] [blame] | 184 | |
Johannes Berg | 53f73c0 | 2010-10-05 19:37:40 +0200 | [diff] [blame] | 185 | void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta, bool tx) |
Johannes Berg | 44d414d | 2008-09-08 17:44:28 +0200 | [diff] [blame] | 186 | { |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 187 | int i; |
Johannes Berg | 44d414d | 2008-09-08 17:44:28 +0200 | [diff] [blame] | 188 | |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 189 | cancel_work_sync(&sta->ampdu_mlme.work); |
| 190 | |
Johannes Berg | 5a306f5 | 2012-11-14 23:22:21 +0100 | [diff] [blame] | 191 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) { |
Johannes Berg | 53f73c0 | 2010-10-05 19:37:40 +0200 | [diff] [blame] | 192 | __ieee80211_stop_tx_ba_session(sta, i, WLAN_BACK_INITIATOR, tx); |
Johannes Berg | 849b796 | 2009-02-10 21:25:54 +0100 | [diff] [blame] | 193 | __ieee80211_stop_rx_ba_session(sta, i, WLAN_BACK_RECIPIENT, |
Johannes Berg | 53f73c0 | 2010-10-05 19:37:40 +0200 | [diff] [blame] | 194 | WLAN_REASON_QSTA_LEAVE_QBSS, tx); |
Johannes Berg | 44d414d | 2008-09-08 17:44:28 +0200 | [diff] [blame] | 195 | } |
Johannes Berg | 44d414d | 2008-09-08 17:44:28 +0200 | [diff] [blame] | 196 | } |
| 197 | |
Johannes Berg | 67c282c | 2010-06-10 10:21:43 +0200 | [diff] [blame] | 198 | void ieee80211_ba_session_work(struct work_struct *work) |
| 199 | { |
| 200 | struct sta_info *sta = |
| 201 | container_of(work, struct sta_info, ampdu_mlme.work); |
| 202 | struct tid_ampdu_tx *tid_tx; |
| 203 | int tid; |
| 204 | |
| 205 | /* |
| 206 | * When this flag is set, new sessions should be |
| 207 | * blocked, and existing sessions will be torn |
| 208 | * down by the code that set the flag, so this |
| 209 | * need not run. |
| 210 | */ |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 211 | if (test_sta_flag(sta, WLAN_STA_BLOCK_BA)) |
Johannes Berg | 67c282c | 2010-06-10 10:21:43 +0200 | [diff] [blame] | 212 | return; |
| 213 | |
Johannes Berg | a93e364 | 2010-06-10 10:21:46 +0200 | [diff] [blame] | 214 | mutex_lock(&sta->ampdu_mlme.mtx); |
Johannes Berg | 5a306f5 | 2012-11-14 23:22:21 +0100 | [diff] [blame] | 215 | for (tid = 0; tid < IEEE80211_NUM_TIDS; tid++) { |
Johannes Berg | 7c3b1dd | 2010-06-10 10:21:44 +0200 | [diff] [blame] | 216 | if (test_and_clear_bit(tid, sta->ampdu_mlme.tid_rx_timer_expired)) |
| 217 | ___ieee80211_stop_rx_ba_session( |
| 218 | sta, tid, WLAN_BACK_RECIPIENT, |
Johannes Berg | 53f73c0 | 2010-10-05 19:37:40 +0200 | [diff] [blame] | 219 | WLAN_REASON_QSTA_TIMEOUT, true); |
Johannes Berg | 7c3b1dd | 2010-06-10 10:21:44 +0200 | [diff] [blame] | 220 | |
Shahar Levi | f41ccd7 | 2011-05-22 16:10:21 +0300 | [diff] [blame] | 221 | if (test_and_clear_bit(tid, |
| 222 | sta->ampdu_mlme.tid_rx_stop_requested)) |
| 223 | ___ieee80211_stop_rx_ba_session( |
| 224 | sta, tid, WLAN_BACK_RECIPIENT, |
| 225 | WLAN_REASON_UNSPECIFIED, true); |
| 226 | |
Johannes Berg | ec034b2 | 2011-05-13 13:35:40 +0200 | [diff] [blame] | 227 | tid_tx = sta->ampdu_mlme.tid_start_tx[tid]; |
| 228 | if (tid_tx) { |
| 229 | /* |
| 230 | * Assign it over to the normal tid_tx array |
| 231 | * where it "goes live". |
| 232 | */ |
| 233 | spin_lock_bh(&sta->lock); |
Johannes Berg | 67c282c | 2010-06-10 10:21:43 +0200 | [diff] [blame] | 234 | |
Johannes Berg | ec034b2 | 2011-05-13 13:35:40 +0200 | [diff] [blame] | 235 | sta->ampdu_mlme.tid_start_tx[tid] = NULL; |
| 236 | /* could there be a race? */ |
| 237 | if (sta->ampdu_mlme.tid_tx[tid]) |
| 238 | kfree(tid_tx); |
| 239 | else |
| 240 | ieee80211_assign_tid_tx(sta, tid, tid_tx); |
| 241 | spin_unlock_bh(&sta->lock); |
| 242 | |
Johannes Berg | 67c282c | 2010-06-10 10:21:43 +0200 | [diff] [blame] | 243 | ieee80211_tx_ba_session_handle_start(sta, tid); |
Johannes Berg | ec034b2 | 2011-05-13 13:35:40 +0200 | [diff] [blame] | 244 | continue; |
| 245 | } |
| 246 | |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 247 | tid_tx = rcu_dereference_protected_tid_tx(sta, tid); |
Johannes Berg | ec034b2 | 2011-05-13 13:35:40 +0200 | [diff] [blame] | 248 | if (tid_tx && test_and_clear_bit(HT_AGG_STATE_WANT_STOP, |
| 249 | &tid_tx->state)) |
Johannes Berg | 67c282c | 2010-06-10 10:21:43 +0200 | [diff] [blame] | 250 | ___ieee80211_stop_tx_ba_session(sta, tid, |
Johannes Berg | 53f73c0 | 2010-10-05 19:37:40 +0200 | [diff] [blame] | 251 | WLAN_BACK_INITIATOR, |
| 252 | true); |
Johannes Berg | 67c282c | 2010-06-10 10:21:43 +0200 | [diff] [blame] | 253 | } |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 254 | mutex_unlock(&sta->ampdu_mlme.mtx); |
Johannes Berg | 67c282c | 2010-06-10 10:21:43 +0200 | [diff] [blame] | 255 | } |
| 256 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 257 | void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata, |
| 258 | const u8 *da, u16 tid, |
| 259 | u16 initiator, u16 reason_code) |
Johannes Berg | 44d414d | 2008-09-08 17:44:28 +0200 | [diff] [blame] | 260 | { |
| 261 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | 44d414d | 2008-09-08 17:44:28 +0200 | [diff] [blame] | 262 | struct sk_buff *skb; |
| 263 | struct ieee80211_mgmt *mgmt; |
| 264 | u16 params; |
| 265 | |
| 266 | skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom); |
Joe Perches | d15b845 | 2011-08-29 14:17:31 -0700 | [diff] [blame] | 267 | if (!skb) |
Johannes Berg | 44d414d | 2008-09-08 17:44:28 +0200 | [diff] [blame] | 268 | return; |
Johannes Berg | 44d414d | 2008-09-08 17:44:28 +0200 | [diff] [blame] | 269 | |
| 270 | skb_reserve(skb, local->hw.extra_tx_headroom); |
| 271 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); |
| 272 | memset(mgmt, 0, 24); |
| 273 | memcpy(mgmt->da, da, ETH_ALEN); |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 274 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
Johannes Berg | 8abd3f9 | 2009-02-10 21:25:47 +0100 | [diff] [blame] | 275 | if (sdata->vif.type == NL80211_IFTYPE_AP || |
Thomas Pedersen | ae2772b | 2011-10-26 14:47:29 -0700 | [diff] [blame] | 276 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN || |
| 277 | sdata->vif.type == NL80211_IFTYPE_MESH_POINT) |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 278 | memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 279 | else if (sdata->vif.type == NL80211_IFTYPE_STATION) |
| 280 | memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN); |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 281 | else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) |
| 282 | memcpy(mgmt->bssid, sdata->u.ibss.bssid, ETH_ALEN); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 283 | |
Johannes Berg | 44d414d | 2008-09-08 17:44:28 +0200 | [diff] [blame] | 284 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| 285 | IEEE80211_STYPE_ACTION); |
| 286 | |
| 287 | skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba)); |
| 288 | |
| 289 | mgmt->u.action.category = WLAN_CATEGORY_BACK; |
| 290 | mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA; |
| 291 | params = (u16)(initiator << 11); /* bit 11 initiator */ |
| 292 | params |= (u16)(tid << 12); /* bit 15:12 TID number */ |
| 293 | |
| 294 | mgmt->u.action.u.delba.params = cpu_to_le16(params); |
| 295 | mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code); |
| 296 | |
Helmut Schaa | cf6bb79 | 2011-12-15 10:18:34 +0100 | [diff] [blame] | 297 | ieee80211_tx_skb_tid(sdata, skb, tid); |
Johannes Berg | 44d414d | 2008-09-08 17:44:28 +0200 | [diff] [blame] | 298 | } |
| 299 | |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 300 | void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata, |
| 301 | struct sta_info *sta, |
| 302 | struct ieee80211_mgmt *mgmt, size_t len) |
| 303 | { |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 304 | u16 tid, params; |
| 305 | u16 initiator; |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 306 | |
| 307 | params = le16_to_cpu(mgmt->u.action.u.delba.params); |
| 308 | tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12; |
| 309 | initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11; |
| 310 | |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 311 | ht_dbg_ratelimited(sdata, "delba from %pM (%s) tid %d reason code %d\n", |
| 312 | mgmt->sa, initiator ? "initiator" : "recipient", |
| 313 | tid, |
| 314 | le16_to_cpu(mgmt->u.action.u.delba.reason_code)); |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 315 | |
| 316 | if (initiator == WLAN_BACK_INITIATOR) |
Johannes Berg | 53f73c0 | 2010-10-05 19:37:40 +0200 | [diff] [blame] | 317 | __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_INITIATOR, 0, |
| 318 | true); |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 319 | else |
Johannes Berg | 53f73c0 | 2010-10-05 19:37:40 +0200 | [diff] [blame] | 320 | __ieee80211_stop_tx_ba_session(sta, tid, WLAN_BACK_RECIPIENT, |
| 321 | true); |
Johannes Berg | de1ede7 | 2008-09-09 14:42:50 +0200 | [diff] [blame] | 322 | } |
Johannes Berg | 0f78231 | 2009-12-01 13:37:02 +0100 | [diff] [blame] | 323 | |
| 324 | int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata, |
| 325 | enum ieee80211_smps_mode smps, const u8 *da, |
| 326 | const u8 *bssid) |
| 327 | { |
| 328 | struct ieee80211_local *local = sdata->local; |
| 329 | struct sk_buff *skb; |
| 330 | struct ieee80211_mgmt *action_frame; |
| 331 | |
| 332 | /* 27 = header + category + action + smps mode */ |
| 333 | skb = dev_alloc_skb(27 + local->hw.extra_tx_headroom); |
| 334 | if (!skb) |
| 335 | return -ENOMEM; |
| 336 | |
| 337 | skb_reserve(skb, local->hw.extra_tx_headroom); |
| 338 | action_frame = (void *)skb_put(skb, 27); |
| 339 | memcpy(action_frame->da, da, ETH_ALEN); |
| 340 | memcpy(action_frame->sa, sdata->dev->dev_addr, ETH_ALEN); |
| 341 | memcpy(action_frame->bssid, bssid, ETH_ALEN); |
| 342 | action_frame->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| 343 | IEEE80211_STYPE_ACTION); |
| 344 | action_frame->u.action.category = WLAN_CATEGORY_HT; |
| 345 | action_frame->u.action.u.ht_smps.action = WLAN_HT_ACTION_SMPS; |
| 346 | switch (smps) { |
| 347 | case IEEE80211_SMPS_AUTOMATIC: |
| 348 | case IEEE80211_SMPS_NUM_MODES: |
| 349 | WARN_ON(1); |
| 350 | case IEEE80211_SMPS_OFF: |
| 351 | action_frame->u.action.u.ht_smps.smps_control = |
| 352 | WLAN_HT_SMPS_CONTROL_DISABLED; |
| 353 | break; |
| 354 | case IEEE80211_SMPS_STATIC: |
| 355 | action_frame->u.action.u.ht_smps.smps_control = |
| 356 | WLAN_HT_SMPS_CONTROL_STATIC; |
| 357 | break; |
| 358 | case IEEE80211_SMPS_DYNAMIC: |
| 359 | action_frame->u.action.u.ht_smps.smps_control = |
| 360 | WLAN_HT_SMPS_CONTROL_DYNAMIC; |
| 361 | break; |
| 362 | } |
| 363 | |
| 364 | /* we'll do more on status of this frame */ |
| 365 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; |
| 366 | ieee80211_tx_skb(sdata, skb); |
| 367 | |
| 368 | return 0; |
| 369 | } |
Johannes Berg | d1f5b7a | 2010-08-05 17:05:55 +0200 | [diff] [blame] | 370 | |
| 371 | void ieee80211_request_smps_work(struct work_struct *work) |
| 372 | { |
| 373 | struct ieee80211_sub_if_data *sdata = |
| 374 | container_of(work, struct ieee80211_sub_if_data, |
| 375 | u.mgd.request_smps_work); |
| 376 | |
| 377 | mutex_lock(&sdata->u.mgd.mtx); |
| 378 | __ieee80211_request_smps(sdata, sdata->u.mgd.driver_smps_mode); |
| 379 | mutex_unlock(&sdata->u.mgd.mtx); |
| 380 | } |
| 381 | |
| 382 | void ieee80211_request_smps(struct ieee80211_vif *vif, |
| 383 | enum ieee80211_smps_mode smps_mode) |
| 384 | { |
| 385 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
| 386 | |
| 387 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) |
| 388 | return; |
| 389 | |
| 390 | if (WARN_ON(smps_mode == IEEE80211_SMPS_OFF)) |
| 391 | smps_mode = IEEE80211_SMPS_AUTOMATIC; |
| 392 | |
Johannes Berg | e4b5595 | 2010-10-13 19:23:21 +0200 | [diff] [blame] | 393 | sdata->u.mgd.driver_smps_mode = smps_mode; |
| 394 | |
Johannes Berg | d1f5b7a | 2010-08-05 17:05:55 +0200 | [diff] [blame] | 395 | ieee80211_queue_work(&sdata->local->hw, |
| 396 | &sdata->u.mgd.request_smps_work); |
| 397 | } |
| 398 | /* this might change ... don't want non-open drivers using it */ |
| 399 | EXPORT_SYMBOL_GPL(ieee80211_request_smps); |