Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2002-2005, Instant802 Networks, Inc. |
| 3 | * Copyright 2005-2006, Devicescape Software, Inc. |
| 4 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> |
Jouni Malinen | 026331c | 2010-02-15 12:53:10 +0200 | [diff] [blame] | 5 | * Copyright 2008-2010 Johannes Berg <johannes@sipsolutions.net> |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 as |
| 9 | * published by the Free Software Foundation. |
| 10 | */ |
| 11 | |
| 12 | #include <net/mac80211.h> |
| 13 | #include "ieee80211_i.h" |
| 14 | #include "rate.h" |
| 15 | #include "mesh.h" |
| 16 | #include "led.h" |
Johannes Berg | 948d887 | 2011-09-29 16:04:29 +0200 | [diff] [blame] | 17 | #include "wme.h" |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 18 | |
| 19 | |
| 20 | void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, |
| 21 | struct sk_buff *skb) |
| 22 | { |
| 23 | struct ieee80211_local *local = hw_to_local(hw); |
| 24 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| 25 | int tmp; |
| 26 | |
| 27 | skb->pkt_type = IEEE80211_TX_STATUS_MSG; |
| 28 | skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ? |
| 29 | &local->skb_queue : &local->skb_queue_unreliable, skb); |
| 30 | tmp = skb_queue_len(&local->skb_queue) + |
| 31 | skb_queue_len(&local->skb_queue_unreliable); |
| 32 | while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT && |
| 33 | (skb = skb_dequeue(&local->skb_queue_unreliable))) { |
| 34 | dev_kfree_skb_irq(skb); |
| 35 | tmp--; |
| 36 | I802_DEBUG_INC(local->tx_status_drop); |
| 37 | } |
| 38 | tasklet_schedule(&local->tasklet); |
| 39 | } |
| 40 | EXPORT_SYMBOL(ieee80211_tx_status_irqsafe); |
| 41 | |
| 42 | static void ieee80211_handle_filtered_frame(struct ieee80211_local *local, |
| 43 | struct sta_info *sta, |
| 44 | struct sk_buff *skb) |
| 45 | { |
| 46 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
Johannes Berg | 948d887 | 2011-09-29 16:04:29 +0200 | [diff] [blame] | 47 | struct ieee80211_hdr *hdr = (void *)skb->data; |
| 48 | int ac; |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 49 | |
| 50 | /* |
Johannes Berg | 697e6a0 | 2010-01-17 01:47:56 +0100 | [diff] [blame] | 51 | * This skb 'survived' a round-trip through the driver, and |
| 52 | * hopefully the driver didn't mangle it too badly. However, |
Walter Goldens | 77c2061 | 2010-05-18 04:44:54 -0700 | [diff] [blame] | 53 | * we can definitely not rely on the control information |
Johannes Berg | c6fcf6b | 2010-01-17 01:47:59 +0100 | [diff] [blame] | 54 | * being correct. Clear it so we don't get junk there, and |
| 55 | * indicate that it needs new processing, but must not be |
| 56 | * modified/encrypted again. |
Johannes Berg | 697e6a0 | 2010-01-17 01:47:56 +0100 | [diff] [blame] | 57 | */ |
| 58 | memset(&info->control, 0, sizeof(info->control)); |
Johannes Berg | 18c9490 | 2010-01-25 19:07:39 +0100 | [diff] [blame] | 59 | |
| 60 | info->control.jiffies = jiffies; |
| 61 | info->control.vif = &sta->sdata->vif; |
Johannes Berg | c6fcf6b | 2010-01-17 01:47:59 +0100 | [diff] [blame] | 62 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING | |
| 63 | IEEE80211_TX_INTFL_RETRANSMISSION; |
Christian Lamparter | eb7d306 | 2010-09-21 21:36:18 +0200 | [diff] [blame] | 64 | info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS; |
Johannes Berg | 697e6a0 | 2010-01-17 01:47:56 +0100 | [diff] [blame] | 65 | |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 66 | sta->tx_filtered_count++; |
| 67 | |
Johannes Berg | 8a8656f | 2011-09-29 16:04:31 +0200 | [diff] [blame] | 68 | /* |
| 69 | * Clear more-data bit on filtered frames, it might be set |
| 70 | * but later frames might time out so it might have to be |
| 71 | * clear again ... It's all rather unlikely (this frame |
| 72 | * should time out first, right?) but let's not confuse |
| 73 | * peers unnecessarily. |
| 74 | */ |
| 75 | if (hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_MOREDATA)) |
| 76 | hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_MOREDATA); |
| 77 | |
Johannes Berg | 948d887 | 2011-09-29 16:04:29 +0200 | [diff] [blame] | 78 | if (ieee80211_is_data_qos(hdr->frame_control)) { |
Johannes Berg | 47086fc | 2011-09-29 16:04:33 +0200 | [diff] [blame] | 79 | u8 *p = ieee80211_get_qos_ctl(hdr); |
| 80 | int tid = *p & IEEE80211_QOS_CTL_TID_MASK; |
| 81 | |
| 82 | /* |
| 83 | * Clear EOSP if set, this could happen e.g. |
| 84 | * if an absence period (us being a P2P GO) |
| 85 | * shortens the SP. |
| 86 | */ |
| 87 | if (*p & IEEE80211_QOS_CTL_EOSP) |
| 88 | *p &= ~IEEE80211_QOS_CTL_EOSP; |
Johannes Berg | 948d887 | 2011-09-29 16:04:29 +0200 | [diff] [blame] | 89 | ac = ieee802_1d_to_ac[tid & 7]; |
| 90 | } else { |
| 91 | ac = IEEE80211_AC_BE; |
| 92 | } |
| 93 | |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 94 | /* |
| 95 | * Clear the TX filter mask for this STA when sending the next |
| 96 | * packet. If the STA went to power save mode, this will happen |
| 97 | * when it wakes up for the next time. |
| 98 | */ |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame^] | 99 | set_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT); |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 100 | |
| 101 | /* |
| 102 | * This code races in the following way: |
| 103 | * |
| 104 | * (1) STA sends frame indicating it will go to sleep and does so |
| 105 | * (2) hardware/firmware adds STA to filter list, passes frame up |
| 106 | * (3) hardware/firmware processes TX fifo and suppresses a frame |
| 107 | * (4) we get TX status before having processed the frame and |
| 108 | * knowing that the STA has gone to sleep. |
| 109 | * |
| 110 | * This is actually quite unlikely even when both those events are |
| 111 | * processed from interrupts coming in quickly after one another or |
| 112 | * even at the same time because we queue both TX status events and |
| 113 | * RX frames to be processed by a tasklet and process them in the |
| 114 | * same order that they were received or TX status last. Hence, there |
| 115 | * is no race as long as the frame RX is processed before the next TX |
| 116 | * status, which drivers can ensure, see below. |
| 117 | * |
| 118 | * Note that this can only happen if the hardware or firmware can |
| 119 | * actually add STAs to the filter list, if this is done by the |
| 120 | * driver in response to set_tim() (which will only reduce the race |
| 121 | * this whole filtering tries to solve, not completely solve it) |
| 122 | * this situation cannot happen. |
| 123 | * |
| 124 | * To completely solve this race drivers need to make sure that they |
| 125 | * (a) don't mix the irq-safe/not irq-safe TX status/RX processing |
| 126 | * functions and |
| 127 | * (b) always process RX events before TX status events if ordering |
| 128 | * can be unknown, for example with different interrupt status |
| 129 | * bits. |
Arik Nemtsov | d057e5a | 2011-01-31 22:29:13 +0200 | [diff] [blame] | 130 | * (c) if PS mode transitions are manual (i.e. the flag |
| 131 | * %IEEE80211_HW_AP_LINK_PS is set), always process PS state |
| 132 | * changes before calling TX status events if ordering can be |
| 133 | * unknown. |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 134 | */ |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame^] | 135 | if (test_sta_flag(sta, WLAN_STA_PS_STA) && |
Johannes Berg | 948d887 | 2011-09-29 16:04:29 +0200 | [diff] [blame] | 136 | skb_queue_len(&sta->tx_filtered[ac]) < STA_MAX_TX_BUFFER) { |
| 137 | skb_queue_tail(&sta->tx_filtered[ac], skb); |
Johannes Berg | c868cb3 | 2011-09-29 16:04:27 +0200 | [diff] [blame] | 138 | sta_info_recalc_tim(sta); |
Johannes Berg | 6075039 | 2011-09-29 16:04:28 +0200 | [diff] [blame] | 139 | |
| 140 | if (!timer_pending(&local->sta_cleanup)) |
| 141 | mod_timer(&local->sta_cleanup, |
| 142 | round_jiffies(jiffies + |
| 143 | STA_INFO_CLEANUP_INTERVAL)); |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 144 | return; |
| 145 | } |
| 146 | |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame^] | 147 | if (!test_sta_flag(sta, WLAN_STA_PS_STA) && |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 148 | !(info->flags & IEEE80211_TX_INTFL_RETRIED)) { |
| 149 | /* Software retry the packet once */ |
| 150 | info->flags |= IEEE80211_TX_INTFL_RETRIED; |
| 151 | ieee80211_add_pending_skb(local, skb); |
| 152 | return; |
| 153 | } |
| 154 | |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 155 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| 156 | if (net_ratelimit()) |
Joe Perches | 0fb9a9e | 2010-08-20 16:25:38 -0700 | [diff] [blame] | 157 | wiphy_debug(local->hw.wiphy, |
| 158 | "dropped TX filtered frame, queue_len=%d PS=%d @%lu\n", |
Johannes Berg | 948d887 | 2011-09-29 16:04:29 +0200 | [diff] [blame] | 159 | skb_queue_len(&sta->tx_filtered[ac]), |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame^] | 160 | !!test_sta_flag(sta, WLAN_STA_PS_STA), jiffies); |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 161 | #endif |
| 162 | dev_kfree_skb(skb); |
| 163 | } |
| 164 | |
Felix Fietkau | f0425be | 2011-08-28 21:11:01 +0200 | [diff] [blame] | 165 | static void ieee80211_check_pending_bar(struct sta_info *sta, u8 *addr, u8 tid) |
| 166 | { |
| 167 | struct tid_ampdu_tx *tid_tx; |
| 168 | |
| 169 | tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); |
| 170 | if (!tid_tx || !tid_tx->bar_pending) |
| 171 | return; |
| 172 | |
| 173 | tid_tx->bar_pending = false; |
Felix Fietkau | 8c77124 | 2011-08-20 15:53:55 +0200 | [diff] [blame] | 174 | ieee80211_send_bar(&sta->sdata->vif, addr, tid, tid_tx->failed_bar_ssn); |
Felix Fietkau | f0425be | 2011-08-28 21:11:01 +0200 | [diff] [blame] | 175 | } |
| 176 | |
Johannes Berg | 0f78231 | 2009-12-01 13:37:02 +0100 | [diff] [blame] | 177 | static void ieee80211_frame_acked(struct sta_info *sta, struct sk_buff *skb) |
| 178 | { |
| 179 | struct ieee80211_mgmt *mgmt = (void *) skb->data; |
| 180 | struct ieee80211_local *local = sta->local; |
| 181 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
| 182 | |
Felix Fietkau | f0425be | 2011-08-28 21:11:01 +0200 | [diff] [blame] | 183 | if (ieee80211_is_data_qos(mgmt->frame_control)) { |
| 184 | struct ieee80211_hdr *hdr = (void *) skb->data; |
| 185 | u8 *qc = ieee80211_get_qos_ctl(hdr); |
| 186 | u16 tid = qc[0] & 0xf; |
| 187 | |
| 188 | ieee80211_check_pending_bar(sta, hdr->addr1, tid); |
| 189 | } |
| 190 | |
Johannes Berg | 0f78231 | 2009-12-01 13:37:02 +0100 | [diff] [blame] | 191 | if (ieee80211_is_action(mgmt->frame_control) && |
| 192 | sdata->vif.type == NL80211_IFTYPE_STATION && |
| 193 | mgmt->u.action.category == WLAN_CATEGORY_HT && |
| 194 | mgmt->u.action.u.ht_smps.action == WLAN_HT_ACTION_SMPS) { |
| 195 | /* |
| 196 | * This update looks racy, but isn't -- if we come |
| 197 | * here we've definitely got a station that we're |
| 198 | * talking to, and on a managed interface that can |
| 199 | * only be the AP. And the only other place updating |
| 200 | * this variable is before we're associated. |
| 201 | */ |
| 202 | switch (mgmt->u.action.u.ht_smps.smps_control) { |
| 203 | case WLAN_HT_SMPS_CONTROL_DYNAMIC: |
| 204 | sta->sdata->u.mgd.ap_smps = IEEE80211_SMPS_DYNAMIC; |
| 205 | break; |
| 206 | case WLAN_HT_SMPS_CONTROL_STATIC: |
| 207 | sta->sdata->u.mgd.ap_smps = IEEE80211_SMPS_STATIC; |
| 208 | break; |
| 209 | case WLAN_HT_SMPS_CONTROL_DISABLED: |
| 210 | default: /* shouldn't happen since we don't send that */ |
| 211 | sta->sdata->u.mgd.ap_smps = IEEE80211_SMPS_OFF; |
| 212 | break; |
| 213 | } |
| 214 | |
| 215 | ieee80211_queue_work(&local->hw, &local->recalc_smps); |
| 216 | } |
| 217 | } |
| 218 | |
Felix Fietkau | f0425be | 2011-08-28 21:11:01 +0200 | [diff] [blame] | 219 | static void ieee80211_set_bar_pending(struct sta_info *sta, u8 tid, u16 ssn) |
| 220 | { |
| 221 | struct tid_ampdu_tx *tid_tx; |
| 222 | |
| 223 | tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); |
| 224 | if (!tid_tx) |
| 225 | return; |
| 226 | |
| 227 | tid_tx->failed_bar_ssn = ssn; |
| 228 | tid_tx->bar_pending = true; |
| 229 | } |
| 230 | |
Johannes Berg | 99ba2a1 | 2010-11-24 08:10:06 +0100 | [diff] [blame] | 231 | /* |
| 232 | * Use a static threshold for now, best value to be determined |
| 233 | * by testing ... |
| 234 | * Should it depend on: |
| 235 | * - on # of retransmissions |
| 236 | * - current throughput (higher value for higher tpt)? |
| 237 | */ |
| 238 | #define STA_LOST_PKT_THRESHOLD 50 |
| 239 | |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 240 | void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) |
| 241 | { |
| 242 | struct sk_buff *skb2; |
| 243 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
| 244 | struct ieee80211_local *local = hw_to_local(hw); |
| 245 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| 246 | u16 frag, type; |
| 247 | __le16 fc; |
| 248 | struct ieee80211_supported_band *sband; |
| 249 | struct ieee80211_tx_status_rtap_hdr *rthdr; |
| 250 | struct ieee80211_sub_if_data *sdata; |
| 251 | struct net_device *prev_dev = NULL; |
Johannes Berg | abe6063 | 2009-11-25 17:46:18 +0100 | [diff] [blame] | 252 | struct sta_info *sta, *tmp; |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 253 | int retry_count = -1, i; |
Juuso Oikarinen | 0c86980 | 2010-04-22 10:27:48 +0300 | [diff] [blame] | 254 | int rates_idx = -1; |
Felix Fietkau | eaf5553 | 2010-03-11 16:28:24 +0100 | [diff] [blame] | 255 | bool send_to_cooked; |
Felix Fietkau | 04ac3c0 | 2010-12-02 21:01:08 +0100 | [diff] [blame] | 256 | bool acked; |
Helmut Schaa | e69dede | 2011-08-11 16:17:42 +0200 | [diff] [blame] | 257 | struct ieee80211_bar *bar; |
| 258 | u16 tid; |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 259 | |
| 260 | for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { |
Helmut Schaa | be7974a | 2011-03-21 15:07:55 +0100 | [diff] [blame] | 261 | if (info->status.rates[i].idx < 0) { |
| 262 | break; |
| 263 | } else if (i >= hw->max_report_rates) { |
| 264 | /* the HW cannot have attempted that rate */ |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 265 | info->status.rates[i].idx = -1; |
| 266 | info->status.rates[i].count = 0; |
Helmut Schaa | be7974a | 2011-03-21 15:07:55 +0100 | [diff] [blame] | 267 | break; |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 268 | } |
| 269 | |
| 270 | retry_count += info->status.rates[i].count; |
| 271 | } |
Helmut Schaa | be7974a | 2011-03-21 15:07:55 +0100 | [diff] [blame] | 272 | rates_idx = i - 1; |
| 273 | |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 274 | if (retry_count < 0) |
| 275 | retry_count = 0; |
| 276 | |
| 277 | rcu_read_lock(); |
| 278 | |
| 279 | sband = local->hw.wiphy->bands[info->band]; |
Vivek Natarajan | 375177b | 2010-02-09 14:50:28 +0530 | [diff] [blame] | 280 | fc = hdr->frame_control; |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 281 | |
Johannes Berg | abe6063 | 2009-11-25 17:46:18 +0100 | [diff] [blame] | 282 | for_each_sta_info(local, hdr->addr1, sta, tmp) { |
| 283 | /* skip wrong virtual interface */ |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 284 | if (memcmp(hdr->addr2, sta->sdata->vif.addr, ETH_ALEN)) |
Johannes Berg | abe6063 | 2009-11-25 17:46:18 +0100 | [diff] [blame] | 285 | continue; |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 286 | |
Johannes Berg | 47086fc | 2011-09-29 16:04:33 +0200 | [diff] [blame] | 287 | if (info->flags & IEEE80211_TX_STATUS_EOSP) |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame^] | 288 | clear_sta_flag(sta, WLAN_STA_SP); |
Johannes Berg | 47086fc | 2011-09-29 16:04:33 +0200 | [diff] [blame] | 289 | |
Felix Fietkau | 04ac3c0 | 2010-12-02 21:01:08 +0100 | [diff] [blame] | 290 | acked = !!(info->flags & IEEE80211_TX_STAT_ACK); |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame^] | 291 | if (!acked && test_sta_flag(sta, WLAN_STA_PS_STA)) { |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 292 | /* |
| 293 | * The STA is in power save mode, so assume |
| 294 | * that this TX packet failed because of that. |
| 295 | */ |
| 296 | ieee80211_handle_filtered_frame(local, sta, skb); |
| 297 | rcu_read_unlock(); |
| 298 | return; |
| 299 | } |
| 300 | |
Juuso Oikarinen | 0c86980 | 2010-04-22 10:27:48 +0300 | [diff] [blame] | 301 | if ((local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL) && |
| 302 | (rates_idx != -1)) |
| 303 | sta->last_tx_rate = info->status.rates[rates_idx]; |
| 304 | |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 305 | if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) && |
| 306 | (ieee80211_is_data_qos(fc))) { |
| 307 | u16 tid, ssn; |
| 308 | u8 *qc; |
| 309 | |
| 310 | qc = ieee80211_get_qos_ctl(hdr); |
| 311 | tid = qc[0] & 0xf; |
| 312 | ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10) |
| 313 | & IEEE80211_SCTL_SEQ); |
Felix Fietkau | 8c77124 | 2011-08-20 15:53:55 +0200 | [diff] [blame] | 314 | ieee80211_send_bar(&sta->sdata->vif, hdr->addr1, |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 315 | tid, ssn); |
| 316 | } |
| 317 | |
Helmut Schaa | e69dede | 2011-08-11 16:17:42 +0200 | [diff] [blame] | 318 | if (!acked && ieee80211_is_back_req(fc)) { |
Felix Fietkau | 7107676 | 2011-09-15 09:37:46 +0200 | [diff] [blame] | 319 | u16 control; |
| 320 | |
Helmut Schaa | e69dede | 2011-08-11 16:17:42 +0200 | [diff] [blame] | 321 | /* |
Felix Fietkau | 7107676 | 2011-09-15 09:37:46 +0200 | [diff] [blame] | 322 | * BAR failed, store the last SSN and retry sending |
| 323 | * the BAR when the next unicast transmission on the |
| 324 | * same TID succeeds. |
Helmut Schaa | e69dede | 2011-08-11 16:17:42 +0200 | [diff] [blame] | 325 | */ |
| 326 | bar = (struct ieee80211_bar *) skb->data; |
Felix Fietkau | 7107676 | 2011-09-15 09:37:46 +0200 | [diff] [blame] | 327 | control = le16_to_cpu(bar->control); |
| 328 | if (!(control & IEEE80211_BAR_CTRL_MULTI_TID)) { |
Felix Fietkau | f0425be | 2011-08-28 21:11:01 +0200 | [diff] [blame] | 329 | u16 ssn = le16_to_cpu(bar->start_seq_num); |
| 330 | |
Felix Fietkau | 7107676 | 2011-09-15 09:37:46 +0200 | [diff] [blame] | 331 | tid = (control & |
Helmut Schaa | e69dede | 2011-08-11 16:17:42 +0200 | [diff] [blame] | 332 | IEEE80211_BAR_CTRL_TID_INFO_MASK) >> |
| 333 | IEEE80211_BAR_CTRL_TID_INFO_SHIFT; |
Felix Fietkau | f0425be | 2011-08-28 21:11:01 +0200 | [diff] [blame] | 334 | |
| 335 | ieee80211_set_bar_pending(sta, tid, ssn); |
Helmut Schaa | e69dede | 2011-08-11 16:17:42 +0200 | [diff] [blame] | 336 | } |
| 337 | } |
| 338 | |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 339 | if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) { |
| 340 | ieee80211_handle_filtered_frame(local, sta, skb); |
| 341 | rcu_read_unlock(); |
| 342 | return; |
| 343 | } else { |
Felix Fietkau | 04ac3c0 | 2010-12-02 21:01:08 +0100 | [diff] [blame] | 344 | if (!acked) |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 345 | sta->tx_retry_failed++; |
| 346 | sta->tx_retry_count += retry_count; |
| 347 | } |
| 348 | |
| 349 | rate_control_tx_status(local, sband, sta, skb); |
| 350 | if (ieee80211_vif_is_mesh(&sta->sdata->vif)) |
| 351 | ieee80211s_update_metric(local, sta, skb); |
Johannes Berg | 0f78231 | 2009-12-01 13:37:02 +0100 | [diff] [blame] | 352 | |
Felix Fietkau | 04ac3c0 | 2010-12-02 21:01:08 +0100 | [diff] [blame] | 353 | if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked) |
Johannes Berg | 0f78231 | 2009-12-01 13:37:02 +0100 | [diff] [blame] | 354 | ieee80211_frame_acked(sta, skb); |
Johannes Berg | 99ba2a1 | 2010-11-24 08:10:06 +0100 | [diff] [blame] | 355 | |
Felix Fietkau | 04ac3c0 | 2010-12-02 21:01:08 +0100 | [diff] [blame] | 356 | if ((sta->sdata->vif.type == NL80211_IFTYPE_STATION) && |
| 357 | (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) |
| 358 | ieee80211_sta_tx_notify(sta->sdata, (void *) skb->data, acked); |
| 359 | |
Johannes Berg | 99ba2a1 | 2010-11-24 08:10:06 +0100 | [diff] [blame] | 360 | if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) { |
| 361 | if (info->flags & IEEE80211_TX_STAT_ACK) { |
| 362 | if (sta->lost_packets) |
| 363 | sta->lost_packets = 0; |
| 364 | } else if (++sta->lost_packets >= STA_LOST_PKT_THRESHOLD) { |
| 365 | cfg80211_cqm_pktloss_notify(sta->sdata->dev, |
| 366 | sta->sta.addr, |
| 367 | sta->lost_packets, |
| 368 | GFP_ATOMIC); |
| 369 | sta->lost_packets = 0; |
| 370 | } |
| 371 | } |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 372 | } |
| 373 | |
| 374 | rcu_read_unlock(); |
| 375 | |
| 376 | ieee80211_led_tx(local, 0); |
| 377 | |
| 378 | /* SNMP counters |
| 379 | * Fragments are passed to low-level drivers as separate skbs, so these |
| 380 | * are actually fragments, not frames. Update frame counters only for |
| 381 | * the first fragment of the frame. */ |
| 382 | |
| 383 | frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG; |
| 384 | type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE; |
| 385 | |
| 386 | if (info->flags & IEEE80211_TX_STAT_ACK) { |
| 387 | if (frag == 0) { |
| 388 | local->dot11TransmittedFrameCount++; |
| 389 | if (is_multicast_ether_addr(hdr->addr1)) |
| 390 | local->dot11MulticastTransmittedFrameCount++; |
| 391 | if (retry_count > 0) |
| 392 | local->dot11RetryCount++; |
| 393 | if (retry_count > 1) |
| 394 | local->dot11MultipleRetryCount++; |
| 395 | } |
| 396 | |
| 397 | /* This counter shall be incremented for an acknowledged MPDU |
| 398 | * with an individual address in the address 1 field or an MPDU |
| 399 | * with a multicast address in the address 1 field of type Data |
| 400 | * or Management. */ |
| 401 | if (!is_multicast_ether_addr(hdr->addr1) || |
| 402 | type == IEEE80211_FTYPE_DATA || |
| 403 | type == IEEE80211_FTYPE_MGMT) |
| 404 | local->dot11TransmittedFragmentCount++; |
| 405 | } else { |
| 406 | if (frag == 0) |
| 407 | local->dot11FailedCount++; |
| 408 | } |
| 409 | |
Vivek Natarajan | 375177b | 2010-02-09 14:50:28 +0530 | [diff] [blame] | 410 | if (ieee80211_is_nullfunc(fc) && ieee80211_has_pm(fc) && |
| 411 | (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) && |
| 412 | !(info->flags & IEEE80211_TX_CTL_INJECTED) && |
| 413 | local->ps_sdata && !(local->scanning)) { |
| 414 | if (info->flags & IEEE80211_TX_STAT_ACK) { |
| 415 | local->ps_sdata->u.mgd.flags |= |
| 416 | IEEE80211_STA_NULLFUNC_ACKED; |
Vivek Natarajan | 375177b | 2010-02-09 14:50:28 +0530 | [diff] [blame] | 417 | } else |
| 418 | mod_timer(&local->dynamic_ps_timer, jiffies + |
| 419 | msecs_to_jiffies(10)); |
| 420 | } |
| 421 | |
Johannes Berg | f30221e | 2010-11-25 10:02:30 +0100 | [diff] [blame] | 422 | if (info->flags & IEEE80211_TX_INTFL_NL80211_FRAME_TX) { |
| 423 | struct ieee80211_work *wk; |
Johannes Berg | 4334ec8 | 2011-02-02 16:58:06 +0100 | [diff] [blame] | 424 | u64 cookie = (unsigned long)skb; |
Johannes Berg | f30221e | 2010-11-25 10:02:30 +0100 | [diff] [blame] | 425 | |
| 426 | rcu_read_lock(); |
| 427 | list_for_each_entry_rcu(wk, &local->work_list, list) { |
| 428 | if (wk->type != IEEE80211_WORK_OFFCHANNEL_TX) |
| 429 | continue; |
| 430 | if (wk->offchan_tx.frame != skb) |
| 431 | continue; |
| 432 | wk->offchan_tx.frame = NULL; |
| 433 | break; |
| 434 | } |
| 435 | rcu_read_unlock(); |
Johannes Berg | 4334ec8 | 2011-02-02 16:58:06 +0100 | [diff] [blame] | 436 | if (local->hw_roc_skb_for_status == skb) { |
| 437 | cookie = local->hw_roc_cookie ^ 2; |
| 438 | local->hw_roc_skb_for_status = NULL; |
| 439 | } |
Johannes Berg | 5f16a43 | 2011-02-25 15:36:57 +0100 | [diff] [blame] | 440 | |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 441 | cfg80211_mgmt_tx_status( |
Johannes Berg | 4334ec8 | 2011-02-02 16:58:06 +0100 | [diff] [blame] | 442 | skb->dev, cookie, skb->data, skb->len, |
Jouni Malinen | 026331c | 2010-02-15 12:53:10 +0200 | [diff] [blame] | 443 | !!(info->flags & IEEE80211_TX_STAT_ACK), GFP_ATOMIC); |
Johannes Berg | f30221e | 2010-11-25 10:02:30 +0100 | [diff] [blame] | 444 | } |
Jouni Malinen | 026331c | 2010-02-15 12:53:10 +0200 | [diff] [blame] | 445 | |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 446 | /* this was a transmitted frame, but now we want to reuse it */ |
| 447 | skb_orphan(skb); |
| 448 | |
Felix Fietkau | eaf5553 | 2010-03-11 16:28:24 +0100 | [diff] [blame] | 449 | /* Need to make a copy before skb->cb gets cleared */ |
| 450 | send_to_cooked = !!(info->flags & IEEE80211_TX_CTL_INJECTED) || |
| 451 | (type != IEEE80211_FTYPE_DATA); |
| 452 | |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 453 | /* |
| 454 | * This is a bit racy but we can avoid a lot of work |
| 455 | * with this test... |
| 456 | */ |
Felix Fietkau | eaf5553 | 2010-03-11 16:28:24 +0100 | [diff] [blame] | 457 | if (!local->monitors && (!send_to_cooked || !local->cooked_mntrs)) { |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 458 | dev_kfree_skb(skb); |
| 459 | return; |
| 460 | } |
| 461 | |
| 462 | /* send frame to monitor interfaces now */ |
| 463 | |
| 464 | if (skb_headroom(skb) < sizeof(*rthdr)) { |
| 465 | printk(KERN_ERR "ieee80211_tx_status: headroom too small\n"); |
| 466 | dev_kfree_skb(skb); |
| 467 | return; |
| 468 | } |
| 469 | |
| 470 | rthdr = (struct ieee80211_tx_status_rtap_hdr *) |
| 471 | skb_push(skb, sizeof(*rthdr)); |
| 472 | |
| 473 | memset(rthdr, 0, sizeof(*rthdr)); |
| 474 | rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr)); |
| 475 | rthdr->hdr.it_present = |
| 476 | cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) | |
| 477 | (1 << IEEE80211_RADIOTAP_DATA_RETRIES) | |
| 478 | (1 << IEEE80211_RADIOTAP_RATE)); |
| 479 | |
| 480 | if (!(info->flags & IEEE80211_TX_STAT_ACK) && |
| 481 | !is_multicast_ether_addr(hdr->addr1)) |
| 482 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL); |
| 483 | |
| 484 | /* |
| 485 | * XXX: Once radiotap gets the bitmap reset thing the vendor |
| 486 | * extensions proposal contains, we can actually report |
| 487 | * the whole set of tries we did. |
| 488 | */ |
| 489 | if ((info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) || |
| 490 | (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)) |
| 491 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS); |
| 492 | else if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) |
| 493 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS); |
| 494 | if (info->status.rates[0].idx >= 0 && |
| 495 | !(info->status.rates[0].flags & IEEE80211_TX_RC_MCS)) |
| 496 | rthdr->rate = sband->bitrates[ |
| 497 | info->status.rates[0].idx].bitrate / 5; |
| 498 | |
| 499 | /* for now report the total retry_count */ |
| 500 | rthdr->data_retries = retry_count; |
| 501 | |
| 502 | /* XXX: is this sufficient for BPF? */ |
| 503 | skb_set_mac_header(skb, 0); |
| 504 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
| 505 | skb->pkt_type = PACKET_OTHERHOST; |
| 506 | skb->protocol = htons(ETH_P_802_2); |
| 507 | memset(skb->cb, 0, sizeof(skb->cb)); |
| 508 | |
| 509 | rcu_read_lock(); |
| 510 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
| 511 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR) { |
Johannes Berg | 9607e6b | 2009-12-23 13:15:31 +0100 | [diff] [blame] | 512 | if (!ieee80211_sdata_running(sdata)) |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 513 | continue; |
| 514 | |
| 515 | if ((sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) && |
Felix Fietkau | eaf5553 | 2010-03-11 16:28:24 +0100 | [diff] [blame] | 516 | !send_to_cooked) |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 517 | continue; |
| 518 | |
| 519 | if (prev_dev) { |
| 520 | skb2 = skb_clone(skb, GFP_ATOMIC); |
| 521 | if (skb2) { |
| 522 | skb2->dev = prev_dev; |
John W. Linville | 4efe7f5 | 2010-10-07 11:35:40 -0400 | [diff] [blame] | 523 | netif_rx(skb2); |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 524 | } |
| 525 | } |
| 526 | |
| 527 | prev_dev = sdata->dev; |
| 528 | } |
| 529 | } |
| 530 | if (prev_dev) { |
| 531 | skb->dev = prev_dev; |
John W. Linville | 4efe7f5 | 2010-10-07 11:35:40 -0400 | [diff] [blame] | 532 | netif_rx(skb); |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 533 | skb = NULL; |
| 534 | } |
| 535 | rcu_read_unlock(); |
| 536 | dev_kfree_skb(skb); |
| 537 | } |
| 538 | EXPORT_SYMBOL(ieee80211_tx_status); |
Arik Nemtsov | 8178d38 | 2011-04-18 14:22:28 +0300 | [diff] [blame] | 539 | |
| 540 | void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets) |
| 541 | { |
| 542 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); |
| 543 | cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, |
| 544 | num_packets, GFP_ATOMIC); |
| 545 | } |
| 546 | EXPORT_SYMBOL(ieee80211_report_low_ack); |