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 | |
Paul Gortmaker | bc3b2d7 | 2011-07-15 11:47:34 -0400 | [diff] [blame] | 12 | #include <linux/export.h> |
Felix Fietkau | 888d04d | 2012-03-01 15:22:09 +0100 | [diff] [blame] | 13 | #include <linux/etherdevice.h> |
Matti Gottlieb | ad38bfc | 2013-11-18 19:06:45 +0200 | [diff] [blame] | 14 | #include <linux/time.h> |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 15 | #include <net/mac80211.h> |
Johannes Berg | d26ad37 | 2012-02-20 11:38:41 +0100 | [diff] [blame] | 16 | #include <asm/unaligned.h> |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 17 | #include "ieee80211_i.h" |
| 18 | #include "rate.h" |
| 19 | #include "mesh.h" |
| 20 | #include "led.h" |
Johannes Berg | 948d887 | 2011-09-29 16:04:29 +0200 | [diff] [blame] | 21 | #include "wme.h" |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 22 | |
| 23 | |
| 24 | void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, |
| 25 | struct sk_buff *skb) |
| 26 | { |
| 27 | struct ieee80211_local *local = hw_to_local(hw); |
| 28 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| 29 | int tmp; |
| 30 | |
| 31 | skb->pkt_type = IEEE80211_TX_STATUS_MSG; |
| 32 | skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ? |
| 33 | &local->skb_queue : &local->skb_queue_unreliable, skb); |
| 34 | tmp = skb_queue_len(&local->skb_queue) + |
| 35 | skb_queue_len(&local->skb_queue_unreliable); |
| 36 | while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT && |
| 37 | (skb = skb_dequeue(&local->skb_queue_unreliable))) { |
Felix Fietkau | c3e7724 | 2012-10-08 14:39:33 +0200 | [diff] [blame] | 38 | ieee80211_free_txskb(hw, skb); |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 39 | tmp--; |
| 40 | I802_DEBUG_INC(local->tx_status_drop); |
| 41 | } |
| 42 | tasklet_schedule(&local->tasklet); |
| 43 | } |
| 44 | EXPORT_SYMBOL(ieee80211_tx_status_irqsafe); |
| 45 | |
| 46 | static void ieee80211_handle_filtered_frame(struct ieee80211_local *local, |
| 47 | struct sta_info *sta, |
| 48 | struct sk_buff *skb) |
| 49 | { |
| 50 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
Johannes Berg | 948d887 | 2011-09-29 16:04:29 +0200 | [diff] [blame] | 51 | struct ieee80211_hdr *hdr = (void *)skb->data; |
| 52 | int ac; |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 53 | |
| 54 | /* |
Johannes Berg | 697e6a0 | 2010-01-17 01:47:56 +0100 | [diff] [blame] | 55 | * This skb 'survived' a round-trip through the driver, and |
| 56 | * hopefully the driver didn't mangle it too badly. However, |
Walter Goldens | 77c2061 | 2010-05-18 04:44:54 -0700 | [diff] [blame] | 57 | * we can definitely not rely on the control information |
Johannes Berg | c6fcf6b | 2010-01-17 01:47:59 +0100 | [diff] [blame] | 58 | * being correct. Clear it so we don't get junk there, and |
| 59 | * indicate that it needs new processing, but must not be |
| 60 | * modified/encrypted again. |
Johannes Berg | 697e6a0 | 2010-01-17 01:47:56 +0100 | [diff] [blame] | 61 | */ |
| 62 | memset(&info->control, 0, sizeof(info->control)); |
Johannes Berg | 18c9490 | 2010-01-25 19:07:39 +0100 | [diff] [blame] | 63 | |
| 64 | info->control.jiffies = jiffies; |
| 65 | info->control.vif = &sta->sdata->vif; |
Johannes Berg | c6fcf6b | 2010-01-17 01:47:59 +0100 | [diff] [blame] | 66 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING | |
| 67 | IEEE80211_TX_INTFL_RETRANSMISSION; |
Christian Lamparter | eb7d306 | 2010-09-21 21:36:18 +0200 | [diff] [blame] | 68 | info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS; |
Johannes Berg | 697e6a0 | 2010-01-17 01:47:56 +0100 | [diff] [blame] | 69 | |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 70 | sta->tx_filtered_count++; |
| 71 | |
Johannes Berg | 8a8656f | 2011-09-29 16:04:31 +0200 | [diff] [blame] | 72 | /* |
| 73 | * Clear more-data bit on filtered frames, it might be set |
| 74 | * but later frames might time out so it might have to be |
| 75 | * clear again ... It's all rather unlikely (this frame |
| 76 | * should time out first, right?) but let's not confuse |
| 77 | * peers unnecessarily. |
| 78 | */ |
| 79 | if (hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_MOREDATA)) |
| 80 | hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_MOREDATA); |
| 81 | |
Johannes Berg | 948d887 | 2011-09-29 16:04:29 +0200 | [diff] [blame] | 82 | if (ieee80211_is_data_qos(hdr->frame_control)) { |
Johannes Berg | 47086fc | 2011-09-29 16:04:33 +0200 | [diff] [blame] | 83 | u8 *p = ieee80211_get_qos_ctl(hdr); |
| 84 | int tid = *p & IEEE80211_QOS_CTL_TID_MASK; |
| 85 | |
| 86 | /* |
| 87 | * Clear EOSP if set, this could happen e.g. |
| 88 | * if an absence period (us being a P2P GO) |
| 89 | * shortens the SP. |
| 90 | */ |
| 91 | if (*p & IEEE80211_QOS_CTL_EOSP) |
| 92 | *p &= ~IEEE80211_QOS_CTL_EOSP; |
Johannes Berg | 948d887 | 2011-09-29 16:04:29 +0200 | [diff] [blame] | 93 | ac = ieee802_1d_to_ac[tid & 7]; |
| 94 | } else { |
| 95 | ac = IEEE80211_AC_BE; |
| 96 | } |
| 97 | |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 98 | /* |
| 99 | * Clear the TX filter mask for this STA when sending the next |
| 100 | * packet. If the STA went to power save mode, this will happen |
| 101 | * when it wakes up for the next time. |
| 102 | */ |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 103 | set_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT); |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 104 | |
| 105 | /* |
| 106 | * This code races in the following way: |
| 107 | * |
| 108 | * (1) STA sends frame indicating it will go to sleep and does so |
| 109 | * (2) hardware/firmware adds STA to filter list, passes frame up |
| 110 | * (3) hardware/firmware processes TX fifo and suppresses a frame |
| 111 | * (4) we get TX status before having processed the frame and |
| 112 | * knowing that the STA has gone to sleep. |
| 113 | * |
| 114 | * This is actually quite unlikely even when both those events are |
| 115 | * processed from interrupts coming in quickly after one another or |
| 116 | * even at the same time because we queue both TX status events and |
| 117 | * RX frames to be processed by a tasklet and process them in the |
| 118 | * same order that they were received or TX status last. Hence, there |
| 119 | * is no race as long as the frame RX is processed before the next TX |
| 120 | * status, which drivers can ensure, see below. |
| 121 | * |
| 122 | * Note that this can only happen if the hardware or firmware can |
| 123 | * actually add STAs to the filter list, if this is done by the |
| 124 | * driver in response to set_tim() (which will only reduce the race |
| 125 | * this whole filtering tries to solve, not completely solve it) |
| 126 | * this situation cannot happen. |
| 127 | * |
| 128 | * To completely solve this race drivers need to make sure that they |
| 129 | * (a) don't mix the irq-safe/not irq-safe TX status/RX processing |
| 130 | * functions and |
| 131 | * (b) always process RX events before TX status events if ordering |
| 132 | * can be unknown, for example with different interrupt status |
| 133 | * bits. |
Arik Nemtsov | d057e5a | 2011-01-31 22:29:13 +0200 | [diff] [blame] | 134 | * (c) if PS mode transitions are manual (i.e. the flag |
| 135 | * %IEEE80211_HW_AP_LINK_PS is set), always process PS state |
| 136 | * changes before calling TX status events if ordering can be |
| 137 | * unknown. |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 138 | */ |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 139 | if (test_sta_flag(sta, WLAN_STA_PS_STA) && |
Johannes Berg | 948d887 | 2011-09-29 16:04:29 +0200 | [diff] [blame] | 140 | skb_queue_len(&sta->tx_filtered[ac]) < STA_MAX_TX_BUFFER) { |
| 141 | skb_queue_tail(&sta->tx_filtered[ac], skb); |
Johannes Berg | c868cb35 | 2011-09-29 16:04:27 +0200 | [diff] [blame] | 142 | sta_info_recalc_tim(sta); |
Johannes Berg | 6075039 | 2011-09-29 16:04:28 +0200 | [diff] [blame] | 143 | |
| 144 | if (!timer_pending(&local->sta_cleanup)) |
| 145 | mod_timer(&local->sta_cleanup, |
| 146 | round_jiffies(jiffies + |
| 147 | STA_INFO_CLEANUP_INTERVAL)); |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 148 | return; |
| 149 | } |
| 150 | |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 151 | if (!test_sta_flag(sta, WLAN_STA_PS_STA) && |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 152 | !(info->flags & IEEE80211_TX_INTFL_RETRIED)) { |
| 153 | /* Software retry the packet once */ |
| 154 | info->flags |= IEEE80211_TX_INTFL_RETRIED; |
| 155 | ieee80211_add_pending_skb(local, skb); |
| 156 | return; |
| 157 | } |
| 158 | |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 159 | ps_dbg_ratelimited(sta->sdata, |
| 160 | "dropped TX filtered frame, queue_len=%d PS=%d @%lu\n", |
| 161 | skb_queue_len(&sta->tx_filtered[ac]), |
| 162 | !!test_sta_flag(sta, WLAN_STA_PS_STA), jiffies); |
Felix Fietkau | c3e7724 | 2012-10-08 14:39:33 +0200 | [diff] [blame] | 163 | ieee80211_free_txskb(&local->hw, skb); |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 164 | } |
| 165 | |
Felix Fietkau | f0425be | 2011-08-28 21:11:01 +0200 | [diff] [blame] | 166 | static void ieee80211_check_pending_bar(struct sta_info *sta, u8 *addr, u8 tid) |
| 167 | { |
| 168 | struct tid_ampdu_tx *tid_tx; |
| 169 | |
| 170 | tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); |
| 171 | if (!tid_tx || !tid_tx->bar_pending) |
| 172 | return; |
| 173 | |
| 174 | tid_tx->bar_pending = false; |
Felix Fietkau | 8c77124 | 2011-08-20 15:53:55 +0200 | [diff] [blame] | 175 | 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] | 176 | } |
| 177 | |
Johannes Berg | 0f78231 | 2009-12-01 13:37:02 +0100 | [diff] [blame] | 178 | static void ieee80211_frame_acked(struct sta_info *sta, struct sk_buff *skb) |
| 179 | { |
| 180 | struct ieee80211_mgmt *mgmt = (void *) skb->data; |
| 181 | struct ieee80211_local *local = sta->local; |
| 182 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
| 183 | |
Felix Fietkau | 0c5b932 | 2013-09-29 21:39:34 +0200 | [diff] [blame] | 184 | if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) |
| 185 | sta->last_rx = jiffies; |
| 186 | |
Felix Fietkau | f0425be | 2011-08-28 21:11:01 +0200 | [diff] [blame] | 187 | if (ieee80211_is_data_qos(mgmt->frame_control)) { |
| 188 | struct ieee80211_hdr *hdr = (void *) skb->data; |
| 189 | u8 *qc = ieee80211_get_qos_ctl(hdr); |
| 190 | u16 tid = qc[0] & 0xf; |
| 191 | |
| 192 | ieee80211_check_pending_bar(sta, hdr->addr1, tid); |
| 193 | } |
| 194 | |
Johannes Berg | 0f78231 | 2009-12-01 13:37:02 +0100 | [diff] [blame] | 195 | if (ieee80211_is_action(mgmt->frame_control) && |
Johannes Berg | 0f78231 | 2009-12-01 13:37:02 +0100 | [diff] [blame] | 196 | mgmt->u.action.category == WLAN_CATEGORY_HT && |
Johannes Berg | 04ecd25 | 2012-09-11 14:34:12 +0200 | [diff] [blame] | 197 | mgmt->u.action.u.ht_smps.action == WLAN_HT_ACTION_SMPS && |
Johannes Berg | 04ecd25 | 2012-09-11 14:34:12 +0200 | [diff] [blame] | 198 | ieee80211_sdata_running(sdata)) { |
Emmanuel Grumbach | 687da13 | 2013-10-01 16:45:43 +0300 | [diff] [blame] | 199 | enum ieee80211_smps_mode smps_mode; |
| 200 | |
Johannes Berg | 0f78231 | 2009-12-01 13:37:02 +0100 | [diff] [blame] | 201 | switch (mgmt->u.action.u.ht_smps.smps_control) { |
| 202 | case WLAN_HT_SMPS_CONTROL_DYNAMIC: |
Emmanuel Grumbach | 687da13 | 2013-10-01 16:45:43 +0300 | [diff] [blame] | 203 | smps_mode = IEEE80211_SMPS_DYNAMIC; |
Johannes Berg | 0f78231 | 2009-12-01 13:37:02 +0100 | [diff] [blame] | 204 | break; |
| 205 | case WLAN_HT_SMPS_CONTROL_STATIC: |
Emmanuel Grumbach | 687da13 | 2013-10-01 16:45:43 +0300 | [diff] [blame] | 206 | smps_mode = IEEE80211_SMPS_STATIC; |
Johannes Berg | 0f78231 | 2009-12-01 13:37:02 +0100 | [diff] [blame] | 207 | break; |
| 208 | case WLAN_HT_SMPS_CONTROL_DISABLED: |
| 209 | default: /* shouldn't happen since we don't send that */ |
Emmanuel Grumbach | 687da13 | 2013-10-01 16:45:43 +0300 | [diff] [blame] | 210 | smps_mode = IEEE80211_SMPS_OFF; |
Johannes Berg | 0f78231 | 2009-12-01 13:37:02 +0100 | [diff] [blame] | 211 | break; |
| 212 | } |
| 213 | |
Emmanuel Grumbach | 687da13 | 2013-10-01 16:45:43 +0300 | [diff] [blame] | 214 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
| 215 | /* |
| 216 | * This update looks racy, but isn't -- if we come |
| 217 | * here we've definitely got a station that we're |
| 218 | * talking to, and on a managed interface that can |
| 219 | * only be the AP. And the only other place updating |
| 220 | * this variable in managed mode is before association. |
| 221 | */ |
| 222 | sdata->smps_mode = smps_mode; |
| 223 | ieee80211_queue_work(&local->hw, &sdata->recalc_smps); |
| 224 | } else if (sdata->vif.type == NL80211_IFTYPE_AP || |
| 225 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { |
| 226 | sta->known_smps_mode = smps_mode; |
| 227 | } |
Johannes Berg | 0f78231 | 2009-12-01 13:37:02 +0100 | [diff] [blame] | 228 | } |
| 229 | } |
| 230 | |
Felix Fietkau | f0425be | 2011-08-28 21:11:01 +0200 | [diff] [blame] | 231 | static void ieee80211_set_bar_pending(struct sta_info *sta, u8 tid, u16 ssn) |
| 232 | { |
| 233 | struct tid_ampdu_tx *tid_tx; |
| 234 | |
| 235 | tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); |
| 236 | if (!tid_tx) |
| 237 | return; |
| 238 | |
| 239 | tid_tx->failed_bar_ssn = ssn; |
| 240 | tid_tx->bar_pending = true; |
| 241 | } |
| 242 | |
Helmut Schaa | a2fe816 | 2011-10-11 18:08:54 +0200 | [diff] [blame] | 243 | static int ieee80211_tx_radiotap_len(struct ieee80211_tx_info *info) |
| 244 | { |
| 245 | int len = sizeof(struct ieee80211_radiotap_header); |
| 246 | |
| 247 | /* IEEE80211_RADIOTAP_RATE rate */ |
| 248 | if (info->status.rates[0].idx >= 0 && |
Karl Beldan | a824131 | 2013-07-27 11:47:04 +0200 | [diff] [blame] | 249 | !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS | |
| 250 | IEEE80211_TX_RC_VHT_MCS))) |
Helmut Schaa | a2fe816 | 2011-10-11 18:08:54 +0200 | [diff] [blame] | 251 | len += 2; |
| 252 | |
| 253 | /* IEEE80211_RADIOTAP_TX_FLAGS */ |
| 254 | len += 2; |
| 255 | |
| 256 | /* IEEE80211_RADIOTAP_DATA_RETRIES */ |
| 257 | len += 1; |
| 258 | |
Karl Beldan | a824131 | 2013-07-27 11:47:04 +0200 | [diff] [blame] | 259 | /* IEEE80211_RADIOTAP_MCS |
| 260 | * IEEE80211_RADIOTAP_VHT */ |
| 261 | if (info->status.rates[0].idx >= 0) { |
| 262 | if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) |
| 263 | len += 3; |
| 264 | else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) |
| 265 | len = ALIGN(len, 2) + 12; |
| 266 | } |
Helmut Schaa | 7f2a5e2 | 2011-10-11 18:08:55 +0200 | [diff] [blame] | 267 | |
Helmut Schaa | a2fe816 | 2011-10-11 18:08:54 +0200 | [diff] [blame] | 268 | return len; |
| 269 | } |
| 270 | |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 271 | static void |
Karl Beldan | a824131 | 2013-07-27 11:47:04 +0200 | [diff] [blame] | 272 | ieee80211_add_tx_radiotap_header(struct ieee80211_local *local, |
| 273 | struct ieee80211_supported_band *sband, |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 274 | struct sk_buff *skb, int retry_count, |
| 275 | int rtap_len, int shift) |
Helmut Schaa | a2fe816 | 2011-10-11 18:08:54 +0200 | [diff] [blame] | 276 | { |
| 277 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| 278 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
| 279 | struct ieee80211_radiotap_header *rthdr; |
| 280 | unsigned char *pos; |
Helmut Schaa | 9c8f2c4 | 2011-11-18 17:02:16 +0100 | [diff] [blame] | 281 | u16 txflags; |
Helmut Schaa | a2fe816 | 2011-10-11 18:08:54 +0200 | [diff] [blame] | 282 | |
| 283 | rthdr = (struct ieee80211_radiotap_header *) skb_push(skb, rtap_len); |
| 284 | |
| 285 | memset(rthdr, 0, rtap_len); |
| 286 | rthdr->it_len = cpu_to_le16(rtap_len); |
| 287 | rthdr->it_present = |
| 288 | cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) | |
| 289 | (1 << IEEE80211_RADIOTAP_DATA_RETRIES)); |
| 290 | pos = (unsigned char *)(rthdr + 1); |
| 291 | |
| 292 | /* |
| 293 | * XXX: Once radiotap gets the bitmap reset thing the vendor |
| 294 | * extensions proposal contains, we can actually report |
| 295 | * the whole set of tries we did. |
| 296 | */ |
| 297 | |
| 298 | /* IEEE80211_RADIOTAP_RATE */ |
| 299 | if (info->status.rates[0].idx >= 0 && |
Karl Beldan | a824131 | 2013-07-27 11:47:04 +0200 | [diff] [blame] | 300 | !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS | |
| 301 | IEEE80211_TX_RC_VHT_MCS))) { |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 302 | u16 rate; |
| 303 | |
Helmut Schaa | a2fe816 | 2011-10-11 18:08:54 +0200 | [diff] [blame] | 304 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE); |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 305 | rate = sband->bitrates[info->status.rates[0].idx].bitrate; |
| 306 | *pos = DIV_ROUND_UP(rate, 5 * (1 << shift)); |
Helmut Schaa | a2fe816 | 2011-10-11 18:08:54 +0200 | [diff] [blame] | 307 | /* padding for tx flags */ |
| 308 | pos += 2; |
| 309 | } |
| 310 | |
| 311 | /* IEEE80211_RADIOTAP_TX_FLAGS */ |
| 312 | txflags = 0; |
| 313 | if (!(info->flags & IEEE80211_TX_STAT_ACK) && |
| 314 | !is_multicast_ether_addr(hdr->addr1)) |
Helmut Schaa | 9c8f2c4 | 2011-11-18 17:02:16 +0100 | [diff] [blame] | 315 | txflags |= IEEE80211_RADIOTAP_F_TX_FAIL; |
Helmut Schaa | a2fe816 | 2011-10-11 18:08:54 +0200 | [diff] [blame] | 316 | |
Bob Copeland | 311ab8e | 2014-04-16 08:32:41 -0400 | [diff] [blame] | 317 | if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) |
Helmut Schaa | 9c8f2c4 | 2011-11-18 17:02:16 +0100 | [diff] [blame] | 318 | txflags |= IEEE80211_RADIOTAP_F_TX_CTS; |
Bob Copeland | 311ab8e | 2014-04-16 08:32:41 -0400 | [diff] [blame] | 319 | if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) |
Helmut Schaa | 9c8f2c4 | 2011-11-18 17:02:16 +0100 | [diff] [blame] | 320 | txflags |= IEEE80211_RADIOTAP_F_TX_RTS; |
Helmut Schaa | a2fe816 | 2011-10-11 18:08:54 +0200 | [diff] [blame] | 321 | |
| 322 | put_unaligned_le16(txflags, pos); |
| 323 | pos += 2; |
| 324 | |
| 325 | /* IEEE80211_RADIOTAP_DATA_RETRIES */ |
| 326 | /* for now report the total retry_count */ |
| 327 | *pos = retry_count; |
| 328 | pos++; |
Helmut Schaa | 7f2a5e2 | 2011-10-11 18:08:55 +0200 | [diff] [blame] | 329 | |
Karl Beldan | a824131 | 2013-07-27 11:47:04 +0200 | [diff] [blame] | 330 | if (info->status.rates[0].idx < 0) |
| 331 | return; |
| 332 | |
| 333 | /* IEEE80211_RADIOTAP_MCS |
| 334 | * IEEE80211_RADIOTAP_VHT */ |
| 335 | if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) { |
Helmut Schaa | 7f2a5e2 | 2011-10-11 18:08:55 +0200 | [diff] [blame] | 336 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS); |
| 337 | pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS | |
| 338 | IEEE80211_RADIOTAP_MCS_HAVE_GI | |
| 339 | IEEE80211_RADIOTAP_MCS_HAVE_BW; |
| 340 | if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI) |
| 341 | pos[1] |= IEEE80211_RADIOTAP_MCS_SGI; |
| 342 | if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) |
| 343 | pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40; |
| 344 | if (info->status.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD) |
| 345 | pos[1] |= IEEE80211_RADIOTAP_MCS_FMT_GF; |
| 346 | pos[2] = info->status.rates[0].idx; |
| 347 | pos += 3; |
Karl Beldan | a824131 | 2013-07-27 11:47:04 +0200 | [diff] [blame] | 348 | } else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) { |
| 349 | u16 known = local->hw.radiotap_vht_details & |
| 350 | (IEEE80211_RADIOTAP_VHT_KNOWN_GI | |
| 351 | IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH); |
Helmut Schaa | 7f2a5e2 | 2011-10-11 18:08:55 +0200 | [diff] [blame] | 352 | |
Karl Beldan | a824131 | 2013-07-27 11:47:04 +0200 | [diff] [blame] | 353 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT); |
| 354 | |
| 355 | /* required alignment from rthdr */ |
| 356 | pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2); |
| 357 | |
| 358 | /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */ |
| 359 | put_unaligned_le16(known, pos); |
| 360 | pos += 2; |
| 361 | |
| 362 | /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */ |
| 363 | if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI) |
| 364 | *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI; |
| 365 | pos++; |
| 366 | |
| 367 | /* u8 bandwidth */ |
| 368 | if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) |
| 369 | *pos = 1; |
| 370 | else if (info->status.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH) |
| 371 | *pos = 4; |
| 372 | else if (info->status.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH) |
| 373 | *pos = 11; |
| 374 | else /* IEEE80211_TX_RC_{20_MHZ_WIDTH,FIXME:DUP_DATA} */ |
| 375 | *pos = 0; |
| 376 | pos++; |
| 377 | |
| 378 | /* u8 mcs_nss[4] */ |
| 379 | *pos = (ieee80211_rate_get_vht_mcs(&info->status.rates[0]) << 4) | |
| 380 | ieee80211_rate_get_vht_nss(&info->status.rates[0]); |
| 381 | pos += 4; |
| 382 | |
| 383 | /* u8 coding */ |
| 384 | pos++; |
| 385 | /* u8 group_id */ |
| 386 | pos++; |
| 387 | /* u16 partial_aid */ |
| 388 | pos += 2; |
| 389 | } |
Helmut Schaa | a2fe816 | 2011-10-11 18:08:54 +0200 | [diff] [blame] | 390 | } |
| 391 | |
Johannes Berg | 8a2fbed | 2012-10-26 15:53:06 +0200 | [diff] [blame] | 392 | static void ieee80211_report_used_skb(struct ieee80211_local *local, |
| 393 | struct sk_buff *skb, bool dropped) |
| 394 | { |
| 395 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| 396 | struct ieee80211_hdr *hdr = (void *)skb->data; |
| 397 | bool acked = info->flags & IEEE80211_TX_STAT_ACK; |
| 398 | |
| 399 | if (dropped) |
| 400 | acked = false; |
| 401 | |
Johannes Berg | 1672c0e3 | 2013-01-29 15:02:27 +0100 | [diff] [blame] | 402 | if (info->flags & (IEEE80211_TX_INTFL_NL80211_FRAME_TX | |
| 403 | IEEE80211_TX_INTFL_MLME_CONN_TX)) { |
Johannes Berg | 8a2fbed | 2012-10-26 15:53:06 +0200 | [diff] [blame] | 404 | struct ieee80211_sub_if_data *sdata = NULL; |
| 405 | struct ieee80211_sub_if_data *iter_sdata; |
| 406 | u64 cookie = (unsigned long)skb; |
| 407 | |
| 408 | rcu_read_lock(); |
| 409 | |
| 410 | if (skb->dev) { |
| 411 | list_for_each_entry_rcu(iter_sdata, &local->interfaces, |
| 412 | list) { |
| 413 | if (!iter_sdata->dev) |
| 414 | continue; |
| 415 | |
| 416 | if (skb->dev == iter_sdata->dev) { |
| 417 | sdata = iter_sdata; |
| 418 | break; |
| 419 | } |
| 420 | } |
| 421 | } else { |
| 422 | sdata = rcu_dereference(local->p2p_sdata); |
| 423 | } |
| 424 | |
Johannes Berg | 1672c0e3 | 2013-01-29 15:02:27 +0100 | [diff] [blame] | 425 | if (!sdata) { |
Johannes Berg | 8a2fbed | 2012-10-26 15:53:06 +0200 | [diff] [blame] | 426 | skb->dev = NULL; |
Johannes Berg | 1672c0e3 | 2013-01-29 15:02:27 +0100 | [diff] [blame] | 427 | } else if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) { |
| 428 | ieee80211_mgd_conn_tx_status(sdata, hdr->frame_control, |
| 429 | acked); |
| 430 | } else if (ieee80211_is_nullfunc(hdr->frame_control) || |
| 431 | ieee80211_is_qos_nullfunc(hdr->frame_control)) { |
Johannes Berg | 8a2fbed | 2012-10-26 15:53:06 +0200 | [diff] [blame] | 432 | cfg80211_probe_status(sdata->dev, hdr->addr1, |
| 433 | cookie, acked, GFP_ATOMIC); |
| 434 | } else { |
| 435 | cfg80211_mgmt_tx_status(&sdata->wdev, cookie, skb->data, |
| 436 | skb->len, acked, GFP_ATOMIC); |
| 437 | } |
| 438 | |
| 439 | rcu_read_unlock(); |
| 440 | } |
| 441 | |
| 442 | if (unlikely(info->ack_frame_id)) { |
| 443 | struct sk_buff *ack_skb; |
| 444 | unsigned long flags; |
| 445 | |
| 446 | spin_lock_irqsave(&local->ack_status_lock, flags); |
| 447 | ack_skb = idr_find(&local->ack_status_frames, |
| 448 | info->ack_frame_id); |
| 449 | if (ack_skb) |
| 450 | idr_remove(&local->ack_status_frames, |
| 451 | info->ack_frame_id); |
| 452 | spin_unlock_irqrestore(&local->ack_status_lock, flags); |
| 453 | |
| 454 | if (ack_skb) { |
| 455 | if (!dropped) { |
| 456 | /* consumes ack_skb */ |
| 457 | skb_complete_wifi_ack(ack_skb, acked); |
| 458 | } else { |
| 459 | dev_kfree_skb_any(ack_skb); |
| 460 | } |
| 461 | } |
| 462 | } |
| 463 | } |
| 464 | |
Johannes Berg | 99ba2a1 | 2010-11-24 08:10:06 +0100 | [diff] [blame] | 465 | /* |
Matti Gottlieb | ad38bfc | 2013-11-18 19:06:45 +0200 | [diff] [blame] | 466 | * Measure Tx frame completion and removal time for Tx latency statistics |
| 467 | * calculation. A single Tx frame latency should be measured from when it |
| 468 | * is entering the Kernel until we receive Tx complete confirmation indication |
| 469 | * and remove the skb. |
| 470 | */ |
| 471 | static void ieee80211_tx_latency_end_msrmnt(struct ieee80211_local *local, |
| 472 | struct sk_buff *skb, |
| 473 | struct sta_info *sta, |
| 474 | struct ieee80211_hdr *hdr) |
| 475 | { |
| 476 | ktime_t skb_dprt; |
| 477 | struct timespec dprt_time; |
| 478 | u32 msrmnt; |
| 479 | u16 tid; |
| 480 | u8 *qc; |
Johannes Berg | 953467d | 2014-01-29 15:23:46 +0100 | [diff] [blame] | 481 | int i, bin_range_count; |
Matti Gottlieb | ad38bfc | 2013-11-18 19:06:45 +0200 | [diff] [blame] | 482 | u32 *bin_ranges; |
| 483 | __le16 fc; |
| 484 | struct ieee80211_tx_latency_stat *tx_lat; |
| 485 | struct ieee80211_tx_latency_bin_ranges *tx_latency; |
| 486 | ktime_t skb_arv = skb->tstamp; |
| 487 | |
| 488 | tx_latency = rcu_dereference(local->tx_latency); |
| 489 | |
| 490 | /* assert Tx latency stats are enabled & frame arrived when enabled */ |
| 491 | if (!tx_latency || !ktime_to_ns(skb_arv)) |
| 492 | return; |
| 493 | |
| 494 | fc = hdr->frame_control; |
| 495 | |
| 496 | if (!ieee80211_is_data(fc)) /* make sure it is a data frame */ |
| 497 | return; |
| 498 | |
| 499 | /* get frame tid */ |
| 500 | if (ieee80211_is_data_qos(hdr->frame_control)) { |
| 501 | qc = ieee80211_get_qos_ctl(hdr); |
| 502 | tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; |
| 503 | } else { |
| 504 | tid = 0; |
| 505 | } |
| 506 | |
| 507 | tx_lat = &sta->tx_lat[tid]; |
| 508 | |
| 509 | ktime_get_ts(&dprt_time); /* time stamp completion time */ |
| 510 | skb_dprt = ktime_set(dprt_time.tv_sec, dprt_time.tv_nsec); |
| 511 | msrmnt = ktime_to_ms(ktime_sub(skb_dprt, skb_arv)); |
| 512 | |
| 513 | if (tx_lat->max < msrmnt) /* update stats */ |
| 514 | tx_lat->max = msrmnt; |
| 515 | tx_lat->counter++; |
| 516 | tx_lat->sum += msrmnt; |
| 517 | |
| 518 | if (!tx_lat->bins) /* bins not activated */ |
| 519 | return; |
| 520 | |
| 521 | /* count how many Tx frames transmitted with the appropriate latency */ |
| 522 | bin_range_count = tx_latency->n_ranges; |
| 523 | bin_ranges = tx_latency->ranges; |
Matti Gottlieb | ad38bfc | 2013-11-18 19:06:45 +0200 | [diff] [blame] | 524 | |
| 525 | for (i = 0; i < bin_range_count; i++) { |
| 526 | if (msrmnt <= bin_ranges[i]) { |
| 527 | tx_lat->bins[i]++; |
| 528 | break; |
| 529 | } |
| 530 | } |
| 531 | if (i == bin_range_count) /* msrmnt is bigger than the biggest range */ |
| 532 | tx_lat->bins[i]++; |
| 533 | } |
| 534 | |
| 535 | /* |
Johannes Berg | 99ba2a1 | 2010-11-24 08:10:06 +0100 | [diff] [blame] | 536 | * Use a static threshold for now, best value to be determined |
| 537 | * by testing ... |
| 538 | * Should it depend on: |
| 539 | * - on # of retransmissions |
| 540 | * - current throughput (higher value for higher tpt)? |
| 541 | */ |
| 542 | #define STA_LOST_PKT_THRESHOLD 50 |
| 543 | |
Felix Fietkau | abd43a6 | 2014-05-23 20:05:28 +0200 | [diff] [blame] | 544 | static void ieee80211_lost_packet(struct sta_info *sta, struct sk_buff *skb) |
| 545 | { |
| 546 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| 547 | |
| 548 | /* This packet was aggregated but doesn't carry status info */ |
| 549 | if ((info->flags & IEEE80211_TX_CTL_AMPDU) && |
| 550 | !(info->flags & IEEE80211_TX_STAT_AMPDU)) |
| 551 | return; |
| 552 | |
| 553 | if (++sta->lost_packets < STA_LOST_PKT_THRESHOLD) |
| 554 | return; |
| 555 | |
| 556 | cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, |
| 557 | sta->lost_packets, GFP_ATOMIC); |
| 558 | sta->lost_packets = 0; |
| 559 | } |
| 560 | |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 561 | void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) |
| 562 | { |
| 563 | struct sk_buff *skb2; |
| 564 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
| 565 | struct ieee80211_local *local = hw_to_local(hw); |
| 566 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 567 | __le16 fc; |
| 568 | struct ieee80211_supported_band *sband; |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 569 | struct ieee80211_sub_if_data *sdata; |
| 570 | struct net_device *prev_dev = NULL; |
Johannes Berg | abe6063 | 2009-11-25 17:46:18 +0100 | [diff] [blame] | 571 | struct sta_info *sta, *tmp; |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 572 | int retry_count = -1, i; |
Juuso Oikarinen | 0c86980 | 2010-04-22 10:27:48 +0300 | [diff] [blame] | 573 | int rates_idx = -1; |
Felix Fietkau | eaf5553 | 2010-03-11 16:28:24 +0100 | [diff] [blame] | 574 | bool send_to_cooked; |
Felix Fietkau | 04ac3c0 | 2010-12-02 21:01:08 +0100 | [diff] [blame] | 575 | bool acked; |
Helmut Schaa | e69dede | 2011-08-11 16:17:42 +0200 | [diff] [blame] | 576 | struct ieee80211_bar *bar; |
Helmut Schaa | a2fe816 | 2011-10-11 18:08:54 +0200 | [diff] [blame] | 577 | int rtap_len; |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 578 | int shift = 0; |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 579 | |
| 580 | for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { |
Lorenzo Bianconi | d01b316 | 2012-04-06 20:48:15 +0200 | [diff] [blame] | 581 | if ((info->flags & IEEE80211_TX_CTL_AMPDU) && |
| 582 | !(info->flags & IEEE80211_TX_STAT_AMPDU)) { |
| 583 | /* just the first aggr frame carry status info */ |
| 584 | info->status.rates[i].idx = -1; |
| 585 | info->status.rates[i].count = 0; |
| 586 | break; |
| 587 | } else if (info->status.rates[i].idx < 0) { |
Helmut Schaa | be7974a | 2011-03-21 15:07:55 +0100 | [diff] [blame] | 588 | break; |
| 589 | } else if (i >= hw->max_report_rates) { |
| 590 | /* the HW cannot have attempted that rate */ |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 591 | info->status.rates[i].idx = -1; |
| 592 | info->status.rates[i].count = 0; |
Helmut Schaa | be7974a | 2011-03-21 15:07:55 +0100 | [diff] [blame] | 593 | break; |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 594 | } |
| 595 | |
| 596 | retry_count += info->status.rates[i].count; |
| 597 | } |
Helmut Schaa | be7974a | 2011-03-21 15:07:55 +0100 | [diff] [blame] | 598 | rates_idx = i - 1; |
| 599 | |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 600 | if (retry_count < 0) |
| 601 | retry_count = 0; |
| 602 | |
| 603 | rcu_read_lock(); |
| 604 | |
| 605 | sband = local->hw.wiphy->bands[info->band]; |
Vivek Natarajan | 375177b | 2010-02-09 14:50:28 +0530 | [diff] [blame] | 606 | fc = hdr->frame_control; |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 607 | |
Johannes Berg | abe6063 | 2009-11-25 17:46:18 +0100 | [diff] [blame] | 608 | for_each_sta_info(local, hdr->addr1, sta, tmp) { |
| 609 | /* skip wrong virtual interface */ |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 610 | if (!ether_addr_equal(hdr->addr2, sta->sdata->vif.addr)) |
Johannes Berg | abe6063 | 2009-11-25 17:46:18 +0100 | [diff] [blame] | 611 | continue; |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 612 | |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 613 | shift = ieee80211_vif_get_shift(&sta->sdata->vif); |
| 614 | |
Johannes Berg | 47086fc | 2011-09-29 16:04:33 +0200 | [diff] [blame] | 615 | if (info->flags & IEEE80211_TX_STATUS_EOSP) |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 616 | clear_sta_flag(sta, WLAN_STA_SP); |
Johannes Berg | 47086fc | 2011-09-29 16:04:33 +0200 | [diff] [blame] | 617 | |
Felix Fietkau | 04ac3c0 | 2010-12-02 21:01:08 +0100 | [diff] [blame] | 618 | acked = !!(info->flags & IEEE80211_TX_STAT_ACK); |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 619 | if (!acked && test_sta_flag(sta, WLAN_STA_PS_STA)) { |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 620 | /* |
| 621 | * The STA is in power save mode, so assume |
| 622 | * that this TX packet failed because of that. |
| 623 | */ |
| 624 | ieee80211_handle_filtered_frame(local, sta, skb); |
| 625 | rcu_read_unlock(); |
| 626 | return; |
| 627 | } |
| 628 | |
Marco Porsch | 3f52b7e | 2013-01-30 18:14:08 +0100 | [diff] [blame] | 629 | /* mesh Peer Service Period support */ |
| 630 | if (ieee80211_vif_is_mesh(&sta->sdata->vif) && |
| 631 | ieee80211_is_data_qos(fc)) |
| 632 | ieee80211_mpsp_trigger_process( |
| 633 | ieee80211_get_qos_ctl(hdr), |
| 634 | sta, true, acked); |
| 635 | |
Juuso Oikarinen | 0c86980 | 2010-04-22 10:27:48 +0300 | [diff] [blame] | 636 | if ((local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL) && |
Chun-Yeow Yeoh | 00a9a6d | 2014-04-02 12:05:09 +0800 | [diff] [blame] | 637 | (ieee80211_is_data(hdr->frame_control)) && |
Juuso Oikarinen | 0c86980 | 2010-04-22 10:27:48 +0300 | [diff] [blame] | 638 | (rates_idx != -1)) |
| 639 | sta->last_tx_rate = info->status.rates[rates_idx]; |
| 640 | |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 641 | if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) && |
| 642 | (ieee80211_is_data_qos(fc))) { |
| 643 | u16 tid, ssn; |
| 644 | u8 *qc; |
| 645 | |
| 646 | qc = ieee80211_get_qos_ctl(hdr); |
| 647 | tid = qc[0] & 0xf; |
| 648 | ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10) |
| 649 | & IEEE80211_SCTL_SEQ); |
Felix Fietkau | 8c77124 | 2011-08-20 15:53:55 +0200 | [diff] [blame] | 650 | ieee80211_send_bar(&sta->sdata->vif, hdr->addr1, |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 651 | tid, ssn); |
| 652 | } |
| 653 | |
Helmut Schaa | e69dede | 2011-08-11 16:17:42 +0200 | [diff] [blame] | 654 | if (!acked && ieee80211_is_back_req(fc)) { |
Johannes Berg | 8e7c4e4 | 2012-01-20 13:52:36 +0100 | [diff] [blame] | 655 | u16 tid, control; |
Felix Fietkau | 7107676 | 2011-09-15 09:37:46 +0200 | [diff] [blame] | 656 | |
Helmut Schaa | e69dede | 2011-08-11 16:17:42 +0200 | [diff] [blame] | 657 | /* |
Felix Fietkau | 7107676 | 2011-09-15 09:37:46 +0200 | [diff] [blame] | 658 | * BAR failed, store the last SSN and retry sending |
| 659 | * the BAR when the next unicast transmission on the |
| 660 | * same TID succeeds. |
Helmut Schaa | e69dede | 2011-08-11 16:17:42 +0200 | [diff] [blame] | 661 | */ |
| 662 | bar = (struct ieee80211_bar *) skb->data; |
Felix Fietkau | 7107676 | 2011-09-15 09:37:46 +0200 | [diff] [blame] | 663 | control = le16_to_cpu(bar->control); |
| 664 | if (!(control & IEEE80211_BAR_CTRL_MULTI_TID)) { |
Felix Fietkau | f0425be | 2011-08-28 21:11:01 +0200 | [diff] [blame] | 665 | u16 ssn = le16_to_cpu(bar->start_seq_num); |
| 666 | |
Felix Fietkau | 7107676 | 2011-09-15 09:37:46 +0200 | [diff] [blame] | 667 | tid = (control & |
Helmut Schaa | e69dede | 2011-08-11 16:17:42 +0200 | [diff] [blame] | 668 | IEEE80211_BAR_CTRL_TID_INFO_MASK) >> |
| 669 | IEEE80211_BAR_CTRL_TID_INFO_SHIFT; |
Felix Fietkau | f0425be | 2011-08-28 21:11:01 +0200 | [diff] [blame] | 670 | |
Stanislaw Gruszka | 8df6b7b | 2013-01-28 14:42:30 +0100 | [diff] [blame] | 671 | ieee80211_set_bar_pending(sta, tid, ssn); |
Helmut Schaa | e69dede | 2011-08-11 16:17:42 +0200 | [diff] [blame] | 672 | } |
| 673 | } |
| 674 | |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 675 | if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) { |
| 676 | ieee80211_handle_filtered_frame(local, sta, skb); |
| 677 | rcu_read_unlock(); |
| 678 | return; |
| 679 | } else { |
Felix Fietkau | 04ac3c0 | 2010-12-02 21:01:08 +0100 | [diff] [blame] | 680 | if (!acked) |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 681 | sta->tx_retry_failed++; |
| 682 | sta->tx_retry_count += retry_count; |
| 683 | } |
| 684 | |
| 685 | rate_control_tx_status(local, sband, sta, skb); |
| 686 | if (ieee80211_vif_is_mesh(&sta->sdata->vif)) |
| 687 | ieee80211s_update_metric(local, sta, skb); |
Johannes Berg | 0f78231 | 2009-12-01 13:37:02 +0100 | [diff] [blame] | 688 | |
Felix Fietkau | 04ac3c0 | 2010-12-02 21:01:08 +0100 | [diff] [blame] | 689 | if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked) |
Johannes Berg | 0f78231 | 2009-12-01 13:37:02 +0100 | [diff] [blame] | 690 | ieee80211_frame_acked(sta, skb); |
Johannes Berg | 99ba2a1 | 2010-11-24 08:10:06 +0100 | [diff] [blame] | 691 | |
Felix Fietkau | 04ac3c0 | 2010-12-02 21:01:08 +0100 | [diff] [blame] | 692 | if ((sta->sdata->vif.type == NL80211_IFTYPE_STATION) && |
| 693 | (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) |
| 694 | ieee80211_sta_tx_notify(sta->sdata, (void *) skb->data, acked); |
| 695 | |
Johannes Berg | 99ba2a1 | 2010-11-24 08:10:06 +0100 | [diff] [blame] | 696 | if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) { |
| 697 | if (info->flags & IEEE80211_TX_STAT_ACK) { |
| 698 | if (sta->lost_packets) |
| 699 | sta->lost_packets = 0; |
Felix Fietkau | abd43a6 | 2014-05-23 20:05:28 +0200 | [diff] [blame] | 700 | } else { |
| 701 | ieee80211_lost_packet(sta, skb); |
Johannes Berg | 99ba2a1 | 2010-11-24 08:10:06 +0100 | [diff] [blame] | 702 | } |
| 703 | } |
Saravana | db94357 | 2012-11-28 18:27:09 +0530 | [diff] [blame] | 704 | |
| 705 | if (acked) |
| 706 | sta->last_ack_signal = info->status.ack_signal; |
Matti Gottlieb | ad38bfc | 2013-11-18 19:06:45 +0200 | [diff] [blame] | 707 | |
| 708 | /* |
| 709 | * Measure frame removal for tx latency |
| 710 | * statistics calculation |
| 711 | */ |
| 712 | ieee80211_tx_latency_end_msrmnt(local, skb, sta, hdr); |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 713 | } |
| 714 | |
| 715 | rcu_read_unlock(); |
| 716 | |
Fabio Baltieri | e47f250 | 2013-07-25 12:00:26 +0200 | [diff] [blame] | 717 | ieee80211_led_tx(local); |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 718 | |
| 719 | /* SNMP counters |
| 720 | * Fragments are passed to low-level drivers as separate skbs, so these |
| 721 | * are actually fragments, not frames. Update frame counters only for |
| 722 | * the first fragment of the frame. */ |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 723 | if (info->flags & IEEE80211_TX_STAT_ACK) { |
Helmut Schaa | adf5ace | 2011-12-08 13:11:55 +0100 | [diff] [blame] | 724 | if (ieee80211_is_first_frag(hdr->seq_ctrl)) { |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 725 | local->dot11TransmittedFrameCount++; |
| 726 | if (is_multicast_ether_addr(hdr->addr1)) |
| 727 | local->dot11MulticastTransmittedFrameCount++; |
| 728 | if (retry_count > 0) |
| 729 | local->dot11RetryCount++; |
| 730 | if (retry_count > 1) |
| 731 | local->dot11MultipleRetryCount++; |
| 732 | } |
| 733 | |
| 734 | /* This counter shall be incremented for an acknowledged MPDU |
| 735 | * with an individual address in the address 1 field or an MPDU |
| 736 | * with a multicast address in the address 1 field of type Data |
| 737 | * or Management. */ |
| 738 | if (!is_multicast_ether_addr(hdr->addr1) || |
Helmut Schaa | adf5ace | 2011-12-08 13:11:55 +0100 | [diff] [blame] | 739 | ieee80211_is_data(fc) || |
| 740 | ieee80211_is_mgmt(fc)) |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 741 | local->dot11TransmittedFragmentCount++; |
| 742 | } else { |
Helmut Schaa | adf5ace | 2011-12-08 13:11:55 +0100 | [diff] [blame] | 743 | if (ieee80211_is_first_frag(hdr->seq_ctrl)) |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 744 | local->dot11FailedCount++; |
| 745 | } |
| 746 | |
Vivek Natarajan | 375177b | 2010-02-09 14:50:28 +0530 | [diff] [blame] | 747 | if (ieee80211_is_nullfunc(fc) && ieee80211_has_pm(fc) && |
| 748 | (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) && |
| 749 | !(info->flags & IEEE80211_TX_CTL_INJECTED) && |
| 750 | local->ps_sdata && !(local->scanning)) { |
| 751 | if (info->flags & IEEE80211_TX_STAT_ACK) { |
| 752 | local->ps_sdata->u.mgd.flags |= |
| 753 | IEEE80211_STA_NULLFUNC_ACKED; |
Vivek Natarajan | 375177b | 2010-02-09 14:50:28 +0530 | [diff] [blame] | 754 | } else |
| 755 | mod_timer(&local->dynamic_ps_timer, jiffies + |
| 756 | msecs_to_jiffies(10)); |
| 757 | } |
| 758 | |
Johannes Berg | 8a2fbed | 2012-10-26 15:53:06 +0200 | [diff] [blame] | 759 | ieee80211_report_used_skb(local, skb, false); |
Johannes Berg | a729cff | 2011-11-06 14:13:34 +0100 | [diff] [blame] | 760 | |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 761 | /* this was a transmitted frame, but now we want to reuse it */ |
| 762 | skb_orphan(skb); |
| 763 | |
Felix Fietkau | eaf5553 | 2010-03-11 16:28:24 +0100 | [diff] [blame] | 764 | /* Need to make a copy before skb->cb gets cleared */ |
| 765 | send_to_cooked = !!(info->flags & IEEE80211_TX_CTL_INJECTED) || |
Helmut Schaa | adf5ace | 2011-12-08 13:11:55 +0100 | [diff] [blame] | 766 | !(ieee80211_is_data(fc)); |
Felix Fietkau | eaf5553 | 2010-03-11 16:28:24 +0100 | [diff] [blame] | 767 | |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 768 | /* |
| 769 | * This is a bit racy but we can avoid a lot of work |
| 770 | * with this test... |
| 771 | */ |
Felix Fietkau | eaf5553 | 2010-03-11 16:28:24 +0100 | [diff] [blame] | 772 | if (!local->monitors && (!send_to_cooked || !local->cooked_mntrs)) { |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 773 | dev_kfree_skb(skb); |
| 774 | return; |
| 775 | } |
| 776 | |
| 777 | /* send frame to monitor interfaces now */ |
Helmut Schaa | a2fe816 | 2011-10-11 18:08:54 +0200 | [diff] [blame] | 778 | rtap_len = ieee80211_tx_radiotap_len(info); |
| 779 | if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) { |
Joe Perches | f0d2320 | 2012-05-15 14:20:30 -0700 | [diff] [blame] | 780 | pr_err("ieee80211_tx_status: headroom too small\n"); |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 781 | dev_kfree_skb(skb); |
| 782 | return; |
| 783 | } |
Karl Beldan | a824131 | 2013-07-27 11:47:04 +0200 | [diff] [blame] | 784 | ieee80211_add_tx_radiotap_header(local, sband, skb, retry_count, |
| 785 | rtap_len, shift); |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 786 | |
| 787 | /* XXX: is this sufficient for BPF? */ |
| 788 | skb_set_mac_header(skb, 0); |
| 789 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
| 790 | skb->pkt_type = PACKET_OTHERHOST; |
| 791 | skb->protocol = htons(ETH_P_802_2); |
| 792 | memset(skb->cb, 0, sizeof(skb->cb)); |
| 793 | |
| 794 | rcu_read_lock(); |
| 795 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
| 796 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR) { |
Johannes Berg | 9607e6b | 2009-12-23 13:15:31 +0100 | [diff] [blame] | 797 | if (!ieee80211_sdata_running(sdata)) |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 798 | continue; |
| 799 | |
| 800 | if ((sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) && |
Felix Fietkau | eaf5553 | 2010-03-11 16:28:24 +0100 | [diff] [blame] | 801 | !send_to_cooked) |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 802 | continue; |
| 803 | |
| 804 | if (prev_dev) { |
| 805 | skb2 = skb_clone(skb, GFP_ATOMIC); |
| 806 | if (skb2) { |
| 807 | skb2->dev = prev_dev; |
John W. Linville | 4efe7f5 | 2010-10-07 11:35:40 -0400 | [diff] [blame] | 808 | netif_rx(skb2); |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 809 | } |
| 810 | } |
| 811 | |
| 812 | prev_dev = sdata->dev; |
| 813 | } |
| 814 | } |
| 815 | if (prev_dev) { |
| 816 | skb->dev = prev_dev; |
John W. Linville | 4efe7f5 | 2010-10-07 11:35:40 -0400 | [diff] [blame] | 817 | netif_rx(skb); |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 818 | skb = NULL; |
| 819 | } |
| 820 | rcu_read_unlock(); |
| 821 | dev_kfree_skb(skb); |
| 822 | } |
| 823 | EXPORT_SYMBOL(ieee80211_tx_status); |
Arik Nemtsov | 8178d38 | 2011-04-18 14:22:28 +0300 | [diff] [blame] | 824 | |
| 825 | void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets) |
| 826 | { |
| 827 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); |
| 828 | cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, |
| 829 | num_packets, GFP_ATOMIC); |
| 830 | } |
| 831 | EXPORT_SYMBOL(ieee80211_report_low_ack); |
Johannes Berg | 6096de7 | 2011-11-04 11:18:10 +0100 | [diff] [blame] | 832 | |
| 833 | void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb) |
| 834 | { |
Johannes Berg | a729cff | 2011-11-06 14:13:34 +0100 | [diff] [blame] | 835 | struct ieee80211_local *local = hw_to_local(hw); |
Johannes Berg | a729cff | 2011-11-06 14:13:34 +0100 | [diff] [blame] | 836 | |
Johannes Berg | 8a2fbed | 2012-10-26 15:53:06 +0200 | [diff] [blame] | 837 | ieee80211_report_used_skb(local, skb, true); |
Johannes Berg | 6096de7 | 2011-11-04 11:18:10 +0100 | [diff] [blame] | 838 | dev_kfree_skb_any(skb); |
| 839 | } |
| 840 | EXPORT_SYMBOL(ieee80211_free_txskb); |
Felix Fietkau | 1f98ab7 | 2012-11-10 03:44:14 +0100 | [diff] [blame] | 841 | |
| 842 | void ieee80211_purge_tx_queue(struct ieee80211_hw *hw, |
| 843 | struct sk_buff_head *skbs) |
| 844 | { |
| 845 | struct sk_buff *skb; |
| 846 | |
| 847 | while ((skb = __skb_dequeue(skbs))) |
| 848 | ieee80211_free_txskb(hw, skb); |
| 849 | } |