1 /******************************************************************************
5 * Copyright(c) 2008 - 2013 Intel Corporation. All rights reserved.
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of version 2 of the GNU General Public License as
9 * published by the Free Software Foundation.
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
21 * The full GNU General Public License is included in this distribution
22 * in the file called COPYING.
24 * Contact Information:
25 * Intel Linux Wireless <ilw@linux.intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
28 *****************************************************************************/
30 #include <linux/kernel.h>
31 #include <linux/module.h>
32 #include <linux/init.h>
33 #include <linux/sched.h>
34 #include <linux/ieee80211.h>
36 #include "iwl-trans.h"
37 #include "iwl-agn-hw.h"
41 static const u8 tid_to_ac[] = {
52 static void iwlagn_tx_cmd_protection(struct iwl_priv *priv,
53 struct ieee80211_tx_info *info,
54 __le16 fc, __le32 *tx_flags)
56 if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS ||
57 info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT ||
58 info->flags & IEEE80211_TX_CTL_AMPDU)
59 *tx_flags |= TX_CMD_FLG_PROT_REQUIRE_MSK;
63 * handle build REPLY_TX command notification.
65 static void iwlagn_tx_cmd_build_basic(struct iwl_priv *priv,
67 struct iwl_tx_cmd *tx_cmd,
68 struct ieee80211_tx_info *info,
69 struct ieee80211_hdr *hdr, u8 sta_id)
71 __le16 fc = hdr->frame_control;
72 __le32 tx_flags = tx_cmd->tx_flags;
74 tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
76 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
77 tx_flags |= TX_CMD_FLG_ACK_MSK;
79 tx_flags &= ~TX_CMD_FLG_ACK_MSK;
81 if (ieee80211_is_probe_resp(fc))
82 tx_flags |= TX_CMD_FLG_TSF_MSK;
83 else if (ieee80211_is_back_req(fc))
84 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
85 else if (info->band == IEEE80211_BAND_2GHZ &&
86 priv->cfg->bt_params &&
87 priv->cfg->bt_params->advanced_bt_coexist &&
88 (ieee80211_is_auth(fc) || ieee80211_is_assoc_req(fc) ||
89 ieee80211_is_reassoc_req(fc) ||
90 skb->protocol == cpu_to_be16(ETH_P_PAE)))
91 tx_flags |= TX_CMD_FLG_IGNORE_BT;
94 tx_cmd->sta_id = sta_id;
95 if (ieee80211_has_morefrags(fc))
96 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
98 if (ieee80211_is_data_qos(fc)) {
99 u8 *qc = ieee80211_get_qos_ctl(hdr);
100 tx_cmd->tid_tspec = qc[0] & 0xf;
101 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
103 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
104 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
105 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
107 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
110 iwlagn_tx_cmd_protection(priv, info, fc, &tx_flags);
112 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
113 if (ieee80211_is_mgmt(fc)) {
114 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
115 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
117 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
119 tx_cmd->timeout.pm_frame_timeout = 0;
122 tx_cmd->driver_txop = 0;
123 tx_cmd->tx_flags = tx_flags;
124 tx_cmd->next_frame_len = 0;
127 static void iwlagn_tx_cmd_build_rate(struct iwl_priv *priv,
128 struct iwl_tx_cmd *tx_cmd,
129 struct ieee80211_tx_info *info,
130 struct ieee80211_sta *sta,
140 rts_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
141 data_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
143 /* Set retry limit on RTS packets */
144 rts_retry_limit = IWLAGN_RTS_DFAULT_RETRY_LIMIT;
146 /* Set retry limit on DATA packets and Probe Responses*/
147 if (ieee80211_is_probe_resp(fc)) {
148 data_retry_limit = IWLAGN_MGMT_DFAULT_RETRY_LIMIT;
150 min(data_retry_limit, rts_retry_limit);
151 } else if (ieee80211_is_back_req(fc))
152 data_retry_limit = IWLAGN_BAR_DFAULT_RETRY_LIMIT;
154 data_retry_limit = IWLAGN_DEFAULT_TX_RETRY;
157 tx_cmd->data_retry_limit = data_retry_limit;
158 tx_cmd->rts_retry_limit = rts_retry_limit;
160 /* DATA packets will use the uCode station table for rate/antenna
162 if (ieee80211_is_data(fc)) {
163 tx_cmd->initial_rate_index = 0;
164 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
165 #ifdef CONFIG_IWLWIFI_DEVICE_TESTMODE
166 if (priv->tm_fixed_rate) {
168 * rate overwrite by testmode
169 * we not only send lq command to change rate
170 * we also re-enforce per data pkt base.
172 tx_cmd->tx_flags &= ~TX_CMD_FLG_STA_RATE_MSK;
173 memcpy(&tx_cmd->rate_n_flags, &priv->tm_fixed_rate,
174 sizeof(tx_cmd->rate_n_flags));
178 } else if (ieee80211_is_back_req(fc))
179 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
182 * If the current TX rate stored in mac80211 has the MCS bit set, it's
183 * not really a TX rate. Thus, we use the lowest supported rate for
184 * this band. Also use the lowest supported rate if the stored rate
187 rate_idx = info->control.rates[0].idx;
188 if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS ||
189 (rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY))
190 rate_idx = rate_lowest_index(
191 &priv->nvm_data->bands[info->band], sta);
192 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
193 if (info->band == IEEE80211_BAND_5GHZ)
194 rate_idx += IWL_FIRST_OFDM_RATE;
195 /* Get PLCP rate for tx_cmd->rate_n_flags */
196 rate_plcp = iwl_rates[rate_idx].plcp;
197 /* Zero out flags for this packet */
200 /* Set CCK flag as needed */
201 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
202 rate_flags |= RATE_MCS_CCK_MSK;
204 /* Set up antennas */
205 if (priv->cfg->bt_params &&
206 priv->cfg->bt_params->advanced_bt_coexist &&
207 priv->bt_full_concurrent) {
208 /* operated as 1x1 in full concurrency mode */
209 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
210 first_antenna(priv->nvm_data->valid_tx_ant));
212 priv->mgmt_tx_ant = iwl_toggle_tx_ant(
213 priv, priv->mgmt_tx_ant,
214 priv->nvm_data->valid_tx_ant);
215 rate_flags |= iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
217 /* Set the rate in the TX cmd */
218 tx_cmd->rate_n_flags = iwl_hw_set_rate_n_flags(rate_plcp, rate_flags);
221 static void iwlagn_tx_cmd_build_hwcrypto(struct iwl_priv *priv,
222 struct ieee80211_tx_info *info,
223 struct iwl_tx_cmd *tx_cmd,
224 struct sk_buff *skb_frag)
226 struct ieee80211_key_conf *keyconf = info->control.hw_key;
228 switch (keyconf->cipher) {
229 case WLAN_CIPHER_SUITE_CCMP:
230 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
231 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
232 if (info->flags & IEEE80211_TX_CTL_AMPDU)
233 tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
236 case WLAN_CIPHER_SUITE_TKIP:
237 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
238 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
241 case WLAN_CIPHER_SUITE_WEP104:
242 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
244 case WLAN_CIPHER_SUITE_WEP40:
245 tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP |
246 (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
248 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
250 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
251 "with key %d\n", keyconf->keyidx);
255 IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher);
261 * iwl_sta_id_or_broadcast - return sta_id or broadcast sta
262 * @context: the current context
263 * @sta: mac80211 station
265 * In certain circumstances mac80211 passes a station pointer
266 * that may be %NULL, for example during TX or key setup. In
267 * that case, we need to use the broadcast station, so this
268 * inline wraps that pattern.
270 static int iwl_sta_id_or_broadcast(struct iwl_rxon_context *context,
271 struct ieee80211_sta *sta)
276 return context->bcast_sta_id;
278 sta_id = iwl_sta_id(sta);
281 * mac80211 should not be passing a partially
282 * initialised station!
284 WARN_ON(sta_id == IWL_INVALID_STATION);
290 * start REPLY_TX command process
292 int iwlagn_tx_skb(struct iwl_priv *priv,
293 struct ieee80211_sta *sta,
296 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
297 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
298 struct iwl_station_priv *sta_priv = NULL;
299 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
300 struct iwl_device_cmd *dev_cmd;
301 struct iwl_tx_cmd *tx_cmd;
304 u16 len, seq_number = 0;
305 u8 sta_id, tid = IWL_MAX_TID_COUNT;
306 bool is_agg = false, is_data_qos = false;
309 if (info->control.vif)
310 ctx = iwl_rxon_ctx_from_vif(info->control.vif);
312 if (iwl_is_rfkill(priv)) {
313 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
314 goto drop_unlock_priv;
317 fc = hdr->frame_control;
319 #ifdef CONFIG_IWLWIFI_DEBUG
320 if (ieee80211_is_auth(fc))
321 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
322 else if (ieee80211_is_assoc_req(fc))
323 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
324 else if (ieee80211_is_reassoc_req(fc))
325 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
328 if (unlikely(ieee80211_is_probe_resp(fc))) {
329 struct iwl_wipan_noa_data *noa_data =
330 rcu_dereference(priv->noa_data);
333 pskb_expand_head(skb, 0, noa_data->length,
335 memcpy(skb_put(skb, noa_data->length),
336 noa_data->data, noa_data->length);
337 hdr = (struct ieee80211_hdr *)skb->data;
341 hdr_len = ieee80211_hdrlen(fc);
343 /* For management frames use broadcast id to do not break aggregation */
344 if (!ieee80211_is_data(fc))
345 sta_id = ctx->bcast_sta_id;
347 /* Find index into station table for destination station */
348 sta_id = iwl_sta_id_or_broadcast(ctx, sta);
349 if (sta_id == IWL_INVALID_STATION) {
350 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
352 goto drop_unlock_priv;
357 sta_priv = (void *)sta->drv_priv;
359 if (sta_priv && sta_priv->asleep &&
360 (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)) {
362 * This sends an asynchronous command to the device,
363 * but we can rely on it being processed before the
364 * next frame is processed -- and the next frame to
365 * this station is the one that will consume this
367 * For now set the counter to just 1 since we do not
370 * FIXME: If we get two non-bufferable frames one
371 * after the other, we might only send out one of
372 * them because this is racy.
374 iwl_sta_modify_sleep_tx_count(priv, sta_id, 1);
377 dev_cmd = iwl_trans_alloc_tx_cmd(priv->trans);
379 if (unlikely(!dev_cmd))
380 goto drop_unlock_priv;
382 memset(dev_cmd, 0, sizeof(*dev_cmd));
383 tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload;
385 /* Total # bytes to be transmitted */
387 tx_cmd->len = cpu_to_le16(len);
389 if (info->control.hw_key)
390 iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb);
392 /* TODO need this for burst mode later on */
393 iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id);
395 iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, sta, fc);
397 memset(&info->status, 0, sizeof(info->status));
399 info->driver_data[0] = ctx;
400 info->driver_data[1] = dev_cmd;
401 /* From now on, we cannot access info->control */
403 spin_lock(&priv->sta_lock);
405 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
407 struct iwl_tid_data *tid_data;
408 qc = ieee80211_get_qos_ctl(hdr);
409 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
410 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
411 goto drop_unlock_sta;
412 tid_data = &priv->tid_data[sta_id][tid];
414 /* aggregation is on for this <sta,tid> */
415 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
416 tid_data->agg.state != IWL_AGG_ON) {
417 IWL_ERR(priv, "TX_CTL_AMPDU while not in AGG:"
418 " Tx flags = 0x%08x, agg.state = %d",
419 info->flags, tid_data->agg.state);
420 IWL_ERR(priv, "sta_id = %d, tid = %d seq_num = %d",
422 IEEE80211_SEQ_TO_SN(tid_data->seq_number));
423 goto drop_unlock_sta;
426 /* We can receive packets from the stack in IWL_AGG_{ON,OFF}
427 * only. Check this here.
429 if (WARN_ONCE(tid_data->agg.state != IWL_AGG_ON &&
430 tid_data->agg.state != IWL_AGG_OFF,
431 "Tx while agg.state = %d", tid_data->agg.state))
432 goto drop_unlock_sta;
434 seq_number = tid_data->seq_number;
435 seq_number &= IEEE80211_SCTL_SEQ;
436 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
437 hdr->seq_ctrl |= cpu_to_le16(seq_number);
440 if (info->flags & IEEE80211_TX_CTL_AMPDU)
445 /* Copy MAC header from skb into command buffer */
446 memcpy(tx_cmd->hdr, hdr, hdr_len);
448 txq_id = info->hw_queue;
451 txq_id = priv->tid_data[sta_id][tid].agg.txq_id;
452 else if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
454 * The microcode will clear the more data
455 * bit in the last frame it transmits.
457 hdr->frame_control |=
458 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
461 WARN_ON_ONCE(is_agg &&
462 priv->queue_to_mac80211[txq_id] != info->hw_queue);
464 IWL_DEBUG_TX(priv, "TX to [%d|%d] Q:%d - seq: 0x%x\n", sta_id, tid,
467 if (iwl_trans_tx(priv->trans, skb, dev_cmd, txq_id))
468 goto drop_unlock_sta;
470 if (is_data_qos && !ieee80211_has_morefrags(fc))
471 priv->tid_data[sta_id][tid].seq_number = seq_number;
473 spin_unlock(&priv->sta_lock);
476 * Avoid atomic ops if it isn't an associated client.
477 * Also, if this is a packet for aggregation, don't
478 * increase the counter because the ucode will stop
479 * aggregation queues when their respective station
482 if (sta_priv && sta_priv->client && !is_agg)
483 atomic_inc(&sta_priv->pending_frames);
485 if (info->flags & IEEE80211_TX_CTL_TX_OFFCHAN)
486 iwl_scan_offchannel_skb(priv);
492 iwl_trans_free_tx_cmd(priv->trans, dev_cmd);
493 spin_unlock(&priv->sta_lock);
498 static int iwlagn_alloc_agg_txq(struct iwl_priv *priv, int mq)
502 for (q = IWLAGN_FIRST_AMPDU_QUEUE;
503 q < priv->cfg->base_params->num_of_queues; q++) {
504 if (!test_and_set_bit(q, priv->agg_q_alloc)) {
505 priv->queue_to_mac80211[q] = mq;
513 static void iwlagn_dealloc_agg_txq(struct iwl_priv *priv, int q)
515 clear_bit(q, priv->agg_q_alloc);
516 priv->queue_to_mac80211[q] = IWL_INVALID_MAC80211_QUEUE;
519 int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif,
520 struct ieee80211_sta *sta, u16 tid)
522 struct iwl_tid_data *tid_data;
524 enum iwl_agg_state agg_state;
526 sta_id = iwl_sta_id(sta);
528 if (sta_id == IWL_INVALID_STATION) {
529 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
533 spin_lock_bh(&priv->sta_lock);
535 tid_data = &priv->tid_data[sta_id][tid];
536 txq_id = tid_data->agg.txq_id;
538 switch (tid_data->agg.state) {
539 case IWL_EMPTYING_HW_QUEUE_ADDBA:
541 * This can happen if the peer stops aggregation
542 * again before we've had a chance to drain the
543 * queue we selected previously, i.e. before the
544 * session was really started completely.
546 IWL_DEBUG_HT(priv, "AGG stop before setup done\n");
548 case IWL_AGG_STARTING:
550 * This can happen when the session is stopped before
551 * we receive ADDBA response
553 IWL_DEBUG_HT(priv, "AGG stop before AGG became operational\n");
559 "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
560 sta_id, tid, tid_data->agg.state);
561 spin_unlock_bh(&priv->sta_lock);
565 tid_data->agg.ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
567 /* There are still packets for this RA / TID in the HW */
568 if (!test_bit(txq_id, priv->agg_q_alloc)) {
569 IWL_DEBUG_TX_QUEUES(priv,
570 "stopping AGG on STA/TID %d/%d but hwq %d not used\n",
571 sta_id, tid, txq_id);
572 } else if (tid_data->agg.ssn != tid_data->next_reclaimed) {
573 IWL_DEBUG_TX_QUEUES(priv,
574 "Can't proceed: ssn %d, next_recl = %d\n",
576 tid_data->next_reclaimed);
577 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_DELBA;
578 spin_unlock_bh(&priv->sta_lock);
582 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n",
585 agg_state = tid_data->agg.state;
586 tid_data->agg.state = IWL_AGG_OFF;
588 spin_unlock_bh(&priv->sta_lock);
590 if (test_bit(txq_id, priv->agg_q_alloc)) {
592 * If the transport didn't know that we wanted to start
593 * agreggation, don't tell it that we want to stop them.
594 * This can happen when we don't get the addBA response on
595 * time, or we hadn't time to drain the AC queues.
597 if (agg_state == IWL_AGG_ON)
598 iwl_trans_txq_disable(priv->trans, txq_id);
600 IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n",
602 iwlagn_dealloc_agg_txq(priv, txq_id);
605 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
610 int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
611 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
613 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
614 struct iwl_tid_data *tid_data;
615 int sta_id, txq_id, ret;
617 IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n",
620 sta_id = iwl_sta_id(sta);
621 if (sta_id == IWL_INVALID_STATION) {
622 IWL_ERR(priv, "Start AGG on invalid station\n");
625 if (unlikely(tid >= IWL_MAX_TID_COUNT))
628 if (priv->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) {
629 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
633 txq_id = iwlagn_alloc_agg_txq(priv, ctx->ac_to_queue[tid_to_ac[tid]]);
635 IWL_DEBUG_TX_QUEUES(priv,
636 "No free aggregation queue for %pM/%d\n",
641 ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
645 spin_lock_bh(&priv->sta_lock);
646 tid_data = &priv->tid_data[sta_id][tid];
647 tid_data->agg.ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
648 tid_data->agg.txq_id = txq_id;
650 *ssn = tid_data->agg.ssn;
652 if (*ssn == tid_data->next_reclaimed) {
653 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n",
655 tid_data->agg.state = IWL_AGG_STARTING;
656 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
658 IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, "
659 "next_reclaimed = %d\n",
661 tid_data->next_reclaimed);
662 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
664 spin_unlock_bh(&priv->sta_lock);
669 int iwlagn_tx_agg_flush(struct iwl_priv *priv, struct ieee80211_vif *vif,
670 struct ieee80211_sta *sta, u16 tid)
672 struct iwl_tid_data *tid_data;
673 enum iwl_agg_state agg_state;
675 sta_id = iwl_sta_id(sta);
678 * First set the agg state to OFF to avoid calling
679 * ieee80211_stop_tx_ba_cb in iwlagn_check_ratid_empty.
681 spin_lock_bh(&priv->sta_lock);
683 tid_data = &priv->tid_data[sta_id][tid];
684 txq_id = tid_data->agg.txq_id;
685 agg_state = tid_data->agg.state;
686 IWL_DEBUG_TX_QUEUES(priv, "Flush AGG: sta %d tid %d q %d state %d\n",
687 sta_id, tid, txq_id, tid_data->agg.state);
689 tid_data->agg.state = IWL_AGG_OFF;
691 spin_unlock_bh(&priv->sta_lock);
693 if (iwlagn_txfifo_flush(priv, BIT(txq_id)))
694 IWL_ERR(priv, "Couldn't flush the AGG queue\n");
696 if (test_bit(txq_id, priv->agg_q_alloc)) {
698 * If the transport didn't know that we wanted to start
699 * agreggation, don't tell it that we want to stop them.
700 * This can happen when we don't get the addBA response on
701 * time, or we hadn't time to drain the AC queues.
703 if (agg_state == IWL_AGG_ON)
704 iwl_trans_txq_disable(priv->trans, txq_id);
706 IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n",
708 iwlagn_dealloc_agg_txq(priv, txq_id);
714 int iwlagn_tx_agg_oper(struct iwl_priv *priv, struct ieee80211_vif *vif,
715 struct ieee80211_sta *sta, u16 tid, u8 buf_size)
717 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
718 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
722 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
724 spin_lock_bh(&priv->sta_lock);
725 ssn = priv->tid_data[sta_priv->sta_id][tid].agg.ssn;
726 q = priv->tid_data[sta_priv->sta_id][tid].agg.txq_id;
727 priv->tid_data[sta_priv->sta_id][tid].agg.state = IWL_AGG_ON;
728 spin_unlock_bh(&priv->sta_lock);
730 fifo = ctx->ac_to_fifo[tid_to_ac[tid]];
732 iwl_trans_txq_enable(priv->trans, q, fifo, sta_priv->sta_id, tid,
736 * If the limit is 0, then it wasn't initialised yet,
737 * use the default. We can do that since we take the
738 * minimum below, and we don't want to go above our
739 * default due to hardware restrictions.
741 if (sta_priv->max_agg_bufsize == 0)
742 sta_priv->max_agg_bufsize =
743 LINK_QUAL_AGG_FRAME_LIMIT_DEF;
746 * Even though in theory the peer could have different
747 * aggregation reorder buffer sizes for different sessions,
748 * our ucode doesn't allow for that and has a global limit
749 * for each station. Therefore, use the minimum of all the
750 * aggregation sessions and our default value.
752 sta_priv->max_agg_bufsize =
753 min(sta_priv->max_agg_bufsize, buf_size);
755 if (priv->hw_params.use_rts_for_aggregation) {
757 * switch to RTS/CTS if it is the prefer protection
758 * method for HT traffic
761 sta_priv->lq_sta.lq.general_params.flags |=
762 LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
764 priv->agg_tids_count++;
765 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
766 priv->agg_tids_count);
768 sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit =
769 sta_priv->max_agg_bufsize;
771 IWL_DEBUG_HT(priv, "Tx aggregation enabled on ra = %pM tid = %d\n",
774 return iwl_send_lq_cmd(priv, ctx,
775 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
778 static void iwlagn_check_ratid_empty(struct iwl_priv *priv, int sta_id, u8 tid)
780 struct iwl_tid_data *tid_data = &priv->tid_data[sta_id][tid];
781 enum iwl_rxon_context_id ctx;
782 struct ieee80211_vif *vif;
785 lockdep_assert_held(&priv->sta_lock);
787 addr = priv->stations[sta_id].sta.sta.addr;
788 ctx = priv->stations[sta_id].ctxid;
789 vif = priv->contexts[ctx].vif;
791 switch (priv->tid_data[sta_id][tid].agg.state) {
792 case IWL_EMPTYING_HW_QUEUE_DELBA:
793 /* There are no packets for this RA / TID in the HW any more */
794 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
795 IWL_DEBUG_TX_QUEUES(priv,
796 "Can continue DELBA flow ssn = next_recl ="
797 " %d", tid_data->next_reclaimed);
798 iwl_trans_txq_disable(priv->trans,
799 tid_data->agg.txq_id);
800 iwlagn_dealloc_agg_txq(priv, tid_data->agg.txq_id);
801 tid_data->agg.state = IWL_AGG_OFF;
802 ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid);
805 case IWL_EMPTYING_HW_QUEUE_ADDBA:
806 /* There are no packets for this RA / TID in the HW any more */
807 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
808 IWL_DEBUG_TX_QUEUES(priv,
809 "Can continue ADDBA flow ssn = next_recl ="
810 " %d", tid_data->next_reclaimed);
811 tid_data->agg.state = IWL_AGG_STARTING;
812 ieee80211_start_tx_ba_cb_irqsafe(vif, addr, tid);
820 static void iwlagn_non_agg_tx_status(struct iwl_priv *priv,
821 struct iwl_rxon_context *ctx,
824 struct ieee80211_sta *sta;
825 struct iwl_station_priv *sta_priv;
828 sta = ieee80211_find_sta(ctx->vif, addr1);
830 sta_priv = (void *)sta->drv_priv;
831 /* avoid atomic ops if this isn't a client */
832 if (sta_priv->client &&
833 atomic_dec_return(&sta_priv->pending_frames) == 0)
834 ieee80211_sta_block_awake(priv->hw, sta, false);
840 * translate ucode response to mac80211 tx status control values
842 static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
843 struct ieee80211_tx_info *info)
845 struct ieee80211_tx_rate *r = &info->status.rates[0];
847 info->status.antenna =
848 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
849 if (rate_n_flags & RATE_MCS_HT_MSK)
850 r->flags |= IEEE80211_TX_RC_MCS;
851 if (rate_n_flags & RATE_MCS_GF_MSK)
852 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
853 if (rate_n_flags & RATE_MCS_HT40_MSK)
854 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
855 if (rate_n_flags & RATE_MCS_DUP_MSK)
856 r->flags |= IEEE80211_TX_RC_DUP_DATA;
857 if (rate_n_flags & RATE_MCS_SGI_MSK)
858 r->flags |= IEEE80211_TX_RC_SHORT_GI;
859 r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band);
862 #ifdef CONFIG_IWLWIFI_DEBUG
863 const char *iwl_get_tx_fail_reason(u32 status)
865 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
866 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
868 switch (status & TX_STATUS_MSK) {
869 case TX_STATUS_SUCCESS:
871 TX_STATUS_POSTPONE(DELAY);
872 TX_STATUS_POSTPONE(FEW_BYTES);
873 TX_STATUS_POSTPONE(BT_PRIO);
874 TX_STATUS_POSTPONE(QUIET_PERIOD);
875 TX_STATUS_POSTPONE(CALC_TTAK);
876 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
877 TX_STATUS_FAIL(SHORT_LIMIT);
878 TX_STATUS_FAIL(LONG_LIMIT);
879 TX_STATUS_FAIL(FIFO_UNDERRUN);
880 TX_STATUS_FAIL(DRAIN_FLOW);
881 TX_STATUS_FAIL(RFKILL_FLUSH);
882 TX_STATUS_FAIL(LIFE_EXPIRE);
883 TX_STATUS_FAIL(DEST_PS);
884 TX_STATUS_FAIL(HOST_ABORTED);
885 TX_STATUS_FAIL(BT_RETRY);
886 TX_STATUS_FAIL(STA_INVALID);
887 TX_STATUS_FAIL(FRAG_DROPPED);
888 TX_STATUS_FAIL(TID_DISABLE);
889 TX_STATUS_FAIL(FIFO_FLUSHED);
890 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
891 TX_STATUS_FAIL(PASSIVE_NO_RX);
892 TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
897 #undef TX_STATUS_FAIL
898 #undef TX_STATUS_POSTPONE
900 #endif /* CONFIG_IWLWIFI_DEBUG */
902 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
904 status &= AGG_TX_STATUS_MSK;
907 case AGG_TX_STATE_UNDERRUN_MSK:
908 priv->reply_agg_tx_stats.underrun++;
910 case AGG_TX_STATE_BT_PRIO_MSK:
911 priv->reply_agg_tx_stats.bt_prio++;
913 case AGG_TX_STATE_FEW_BYTES_MSK:
914 priv->reply_agg_tx_stats.few_bytes++;
916 case AGG_TX_STATE_ABORT_MSK:
917 priv->reply_agg_tx_stats.abort++;
919 case AGG_TX_STATE_LAST_SENT_TTL_MSK:
920 priv->reply_agg_tx_stats.last_sent_ttl++;
922 case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
923 priv->reply_agg_tx_stats.last_sent_try++;
925 case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
926 priv->reply_agg_tx_stats.last_sent_bt_kill++;
928 case AGG_TX_STATE_SCD_QUERY_MSK:
929 priv->reply_agg_tx_stats.scd_query++;
931 case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
932 priv->reply_agg_tx_stats.bad_crc32++;
934 case AGG_TX_STATE_RESPONSE_MSK:
935 priv->reply_agg_tx_stats.response++;
937 case AGG_TX_STATE_DUMP_TX_MSK:
938 priv->reply_agg_tx_stats.dump_tx++;
940 case AGG_TX_STATE_DELAY_TX_MSK:
941 priv->reply_agg_tx_stats.delay_tx++;
944 priv->reply_agg_tx_stats.unknown++;
949 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
951 return le32_to_cpup((__le32 *)&tx_resp->status +
952 tx_resp->frame_count) & IEEE80211_MAX_SN;
955 static void iwl_rx_reply_tx_agg(struct iwl_priv *priv,
956 struct iwlagn_tx_resp *tx_resp)
958 struct agg_tx_status *frame_status = &tx_resp->status;
959 int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
960 IWLAGN_TX_RES_TID_POS;
961 int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
962 IWLAGN_TX_RES_RA_POS;
963 struct iwl_ht_agg *agg = &priv->tid_data[sta_id][tid].agg;
964 u32 status = le16_to_cpu(tx_resp->status.status);
967 WARN_ON(tid == IWL_TID_NON_QOS);
969 if (agg->wait_for_ba)
970 IWL_DEBUG_TX_REPLY(priv,
971 "got tx response w/o block-ack\n");
973 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
974 agg->wait_for_ba = (tx_resp->frame_count > 1);
977 * If the BT kill count is non-zero, we'll get this
978 * notification again.
980 if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
981 priv->cfg->bt_params &&
982 priv->cfg->bt_params->advanced_bt_coexist) {
983 IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n");
986 if (tx_resp->frame_count == 1)
989 IWL_DEBUG_TX_REPLY(priv, "TXQ %d initial_rate 0x%x ssn %d frm_cnt %d\n",
991 le32_to_cpu(tx_resp->rate_n_flags),
992 iwlagn_get_scd_ssn(tx_resp), tx_resp->frame_count);
994 /* Construct bit-map of pending frames within Tx window */
995 for (i = 0; i < tx_resp->frame_count; i++) {
996 u16 fstatus = le16_to_cpu(frame_status[i].status);
997 u8 retry_cnt = (fstatus & AGG_TX_TRY_MSK) >> AGG_TX_TRY_POS;
999 if (status & AGG_TX_STATUS_MSK)
1000 iwlagn_count_agg_tx_err_status(priv, fstatus);
1002 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
1003 AGG_TX_STATE_ABORT_MSK))
1006 if (status & AGG_TX_STATUS_MSK || retry_cnt > 1)
1007 IWL_DEBUG_TX_REPLY(priv,
1008 "%d: status %s (0x%04x), try-count (0x%01x)\n",
1010 iwl_get_agg_tx_fail_reason(fstatus),
1011 fstatus & AGG_TX_STATUS_MSK,
1016 #ifdef CONFIG_IWLWIFI_DEBUG
1017 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
1019 const char *iwl_get_agg_tx_fail_reason(u16 status)
1021 status &= AGG_TX_STATUS_MSK;
1023 case AGG_TX_STATE_TRANSMITTED:
1025 AGG_TX_STATE_FAIL(UNDERRUN_MSK);
1026 AGG_TX_STATE_FAIL(BT_PRIO_MSK);
1027 AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
1028 AGG_TX_STATE_FAIL(ABORT_MSK);
1029 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
1030 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
1031 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
1032 AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
1033 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
1034 AGG_TX_STATE_FAIL(RESPONSE_MSK);
1035 AGG_TX_STATE_FAIL(DUMP_TX_MSK);
1036 AGG_TX_STATE_FAIL(DELAY_TX_MSK);
1041 #endif /* CONFIG_IWLWIFI_DEBUG */
1043 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
1045 status &= TX_STATUS_MSK;
1048 case TX_STATUS_POSTPONE_DELAY:
1049 priv->reply_tx_stats.pp_delay++;
1051 case TX_STATUS_POSTPONE_FEW_BYTES:
1052 priv->reply_tx_stats.pp_few_bytes++;
1054 case TX_STATUS_POSTPONE_BT_PRIO:
1055 priv->reply_tx_stats.pp_bt_prio++;
1057 case TX_STATUS_POSTPONE_QUIET_PERIOD:
1058 priv->reply_tx_stats.pp_quiet_period++;
1060 case TX_STATUS_POSTPONE_CALC_TTAK:
1061 priv->reply_tx_stats.pp_calc_ttak++;
1063 case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
1064 priv->reply_tx_stats.int_crossed_retry++;
1066 case TX_STATUS_FAIL_SHORT_LIMIT:
1067 priv->reply_tx_stats.short_limit++;
1069 case TX_STATUS_FAIL_LONG_LIMIT:
1070 priv->reply_tx_stats.long_limit++;
1072 case TX_STATUS_FAIL_FIFO_UNDERRUN:
1073 priv->reply_tx_stats.fifo_underrun++;
1075 case TX_STATUS_FAIL_DRAIN_FLOW:
1076 priv->reply_tx_stats.drain_flow++;
1078 case TX_STATUS_FAIL_RFKILL_FLUSH:
1079 priv->reply_tx_stats.rfkill_flush++;
1081 case TX_STATUS_FAIL_LIFE_EXPIRE:
1082 priv->reply_tx_stats.life_expire++;
1084 case TX_STATUS_FAIL_DEST_PS:
1085 priv->reply_tx_stats.dest_ps++;
1087 case TX_STATUS_FAIL_HOST_ABORTED:
1088 priv->reply_tx_stats.host_abort++;
1090 case TX_STATUS_FAIL_BT_RETRY:
1091 priv->reply_tx_stats.bt_retry++;
1093 case TX_STATUS_FAIL_STA_INVALID:
1094 priv->reply_tx_stats.sta_invalid++;
1096 case TX_STATUS_FAIL_FRAG_DROPPED:
1097 priv->reply_tx_stats.frag_drop++;
1099 case TX_STATUS_FAIL_TID_DISABLE:
1100 priv->reply_tx_stats.tid_disable++;
1102 case TX_STATUS_FAIL_FIFO_FLUSHED:
1103 priv->reply_tx_stats.fifo_flush++;
1105 case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
1106 priv->reply_tx_stats.insuff_cf_poll++;
1108 case TX_STATUS_FAIL_PASSIVE_NO_RX:
1109 priv->reply_tx_stats.fail_hw_drop++;
1111 case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
1112 priv->reply_tx_stats.sta_color_mismatch++;
1115 priv->reply_tx_stats.unknown++;
1120 static void iwlagn_set_tx_status(struct iwl_priv *priv,
1121 struct ieee80211_tx_info *info,
1122 struct iwlagn_tx_resp *tx_resp)
1124 u16 status = le16_to_cpu(tx_resp->status.status);
1126 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1128 info->status.rates[0].count = tx_resp->failure_frame + 1;
1129 info->flags |= iwl_tx_status_to_mac80211(status);
1130 iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
1132 if (!iwl_is_tx_success(status))
1133 iwlagn_count_tx_err_status(priv, status);
1136 static void iwl_check_abort_status(struct iwl_priv *priv,
1137 u8 frame_count, u32 status)
1139 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
1140 IWL_ERR(priv, "Tx flush command to flush out all frames\n");
1141 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
1142 queue_work(priv->workqueue, &priv->tx_flush);
1146 int iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb,
1147 struct iwl_device_cmd *cmd)
1149 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1150 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1151 int txq_id = SEQ_TO_QUEUE(sequence);
1152 int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence);
1153 struct iwlagn_tx_resp *tx_resp = (void *)pkt->data;
1154 struct ieee80211_hdr *hdr;
1155 u32 status = le16_to_cpu(tx_resp->status.status);
1156 u16 ssn = iwlagn_get_scd_ssn(tx_resp);
1160 struct ieee80211_tx_info *info;
1161 struct sk_buff_head skbs;
1162 struct sk_buff *skb;
1163 struct iwl_rxon_context *ctx;
1164 bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE);
1165 bool is_offchannel_skb;
1167 tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
1168 IWLAGN_TX_RES_TID_POS;
1169 sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
1170 IWLAGN_TX_RES_RA_POS;
1172 spin_lock_bh(&priv->sta_lock);
1175 WARN_ON_ONCE(sta_id >= IWLAGN_STATION_COUNT ||
1176 tid >= IWL_MAX_TID_COUNT);
1177 if (txq_id != priv->tid_data[sta_id][tid].agg.txq_id)
1178 IWL_ERR(priv, "txq_id mismatch: %d %d\n", txq_id,
1179 priv->tid_data[sta_id][tid].agg.txq_id);
1180 iwl_rx_reply_tx_agg(priv, tx_resp);
1183 __skb_queue_head_init(&skbs);
1185 is_offchannel_skb = false;
1187 if (tx_resp->frame_count == 1) {
1188 u16 next_reclaimed = le16_to_cpu(tx_resp->seq_ctl);
1189 next_reclaimed = IEEE80211_SEQ_TO_SN(next_reclaimed + 0x10);
1192 /* If this is an aggregation queue, we can rely on the
1193 * ssn since the wifi sequence number corresponds to
1194 * the index in the TFD ring (%256).
1195 * The seq_ctl is the sequence control of the packet
1196 * to which this Tx response relates. But if there is a
1197 * hole in the bitmap of the BA we received, this Tx
1198 * response may allow to reclaim the hole and all the
1199 * subsequent packets that were already acked.
1200 * In that case, seq_ctl != ssn, and the next packet
1201 * to be reclaimed will be ssn and not seq_ctl.
1203 next_reclaimed = ssn;
1206 if (tid != IWL_TID_NON_QOS) {
1207 priv->tid_data[sta_id][tid].next_reclaimed =
1209 IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d\n",
1213 iwl_trans_reclaim(priv->trans, txq_id, ssn, &skbs);
1215 iwlagn_check_ratid_empty(priv, sta_id, tid);
1218 /* process frames */
1219 skb_queue_walk(&skbs, skb) {
1220 hdr = (struct ieee80211_hdr *)skb->data;
1222 if (!ieee80211_is_data_qos(hdr->frame_control))
1223 priv->last_seq_ctl = tx_resp->seq_ctl;
1225 info = IEEE80211_SKB_CB(skb);
1226 ctx = info->driver_data[0];
1227 iwl_trans_free_tx_cmd(priv->trans,
1228 info->driver_data[1]);
1230 memset(&info->status, 0, sizeof(info->status));
1232 if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
1234 ctx->vif->type == NL80211_IFTYPE_STATION) {
1235 /* block and stop all queues */
1236 priv->passive_no_rx = true;
1237 IWL_DEBUG_TX_QUEUES(priv, "stop all queues: "
1239 ieee80211_stop_queues(priv->hw);
1241 IWL_DEBUG_TX_REPLY(priv,
1242 "TXQ %d status %s (0x%08x) "
1243 "rate_n_flags 0x%x retries %d\n",
1245 iwl_get_tx_fail_reason(status),
1247 le32_to_cpu(tx_resp->rate_n_flags),
1248 tx_resp->failure_frame);
1250 IWL_DEBUG_TX_REPLY(priv,
1251 "FrameCnt = %d, idx=%d\n",
1252 tx_resp->frame_count, cmd_index);
1255 /* check if BAR is needed */
1256 if (is_agg && !iwl_is_tx_success(status))
1257 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1258 iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb),
1261 iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1);
1264 (info->flags & IEEE80211_TX_CTL_TX_OFFCHAN);
1268 if (tid != IWL_TID_NON_QOS) {
1269 priv->tid_data[sta_id][tid].next_reclaimed =
1271 IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d\n",
1275 if (!is_agg && freed != 1)
1276 IWL_ERR(priv, "Q: %d, freed %d\n", txq_id, freed);
1279 * An offchannel frame can be send only on the AUX queue, where
1280 * there is no aggregation (and reordering) so it only is single
1281 * skb is expected to be processed.
1283 if (is_offchannel_skb && freed != 1)
1284 IWL_ERR(priv, "OFFCHANNEL SKB freed %d\n", freed);
1286 IWL_DEBUG_TX_REPLY(priv, "TXQ %d status %s (0x%08x)\n", txq_id,
1287 iwl_get_tx_fail_reason(status), status);
1289 IWL_DEBUG_TX_REPLY(priv,
1290 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d seq_ctl=0x%x\n",
1291 le32_to_cpu(tx_resp->rate_n_flags),
1292 tx_resp->failure_frame,
1293 SEQ_TO_INDEX(sequence), ssn,
1294 le16_to_cpu(tx_resp->seq_ctl));
1297 iwl_check_abort_status(priv, tx_resp->frame_count, status);
1298 spin_unlock_bh(&priv->sta_lock);
1300 while (!skb_queue_empty(&skbs)) {
1301 skb = __skb_dequeue(&skbs);
1302 ieee80211_tx_status_ni(priv->hw, skb);
1305 if (is_offchannel_skb)
1306 iwl_scan_offchannel_skb_status(priv);
1312 * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
1314 * Handles block-acknowledge notification from device, which reports success
1315 * of frames sent via aggregation.
1317 int iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
1318 struct iwl_rx_cmd_buffer *rxb,
1319 struct iwl_device_cmd *cmd)
1321 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1322 struct iwl_compressed_ba_resp *ba_resp = (void *)pkt->data;
1323 struct iwl_ht_agg *agg;
1324 struct sk_buff_head reclaimed_skbs;
1325 struct ieee80211_tx_info *info;
1326 struct ieee80211_hdr *hdr;
1327 struct sk_buff *skb;
1332 /* "flow" corresponds to Tx queue */
1333 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
1335 /* "ssn" is start of block-ack Tx window, corresponds to index
1336 * (in Tx queue's circular buffer) of first TFD/frame in window */
1337 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
1339 if (scd_flow >= priv->cfg->base_params->num_of_queues) {
1341 "BUG_ON scd_flow is bigger than number of queues\n");
1345 sta_id = ba_resp->sta_id;
1347 agg = &priv->tid_data[sta_id][tid].agg;
1349 spin_lock_bh(&priv->sta_lock);
1351 if (unlikely(!agg->wait_for_ba)) {
1352 if (unlikely(ba_resp->bitmap))
1353 IWL_ERR(priv, "Received BA when not expected\n");
1354 spin_unlock_bh(&priv->sta_lock);
1358 if (unlikely(scd_flow != agg->txq_id)) {
1360 * FIXME: this is a uCode bug which need to be addressed,
1361 * log the information and return for now.
1362 * Since it is can possibly happen very often and in order
1363 * not to fill the syslog, don't use IWL_ERR or IWL_WARN
1365 IWL_DEBUG_TX_QUEUES(priv,
1366 "Bad queue mapping txq_id=%d, agg_txq[sta:%d,tid:%d]=%d\n",
1367 scd_flow, sta_id, tid, agg->txq_id);
1368 spin_unlock_bh(&priv->sta_lock);
1372 __skb_queue_head_init(&reclaimed_skbs);
1374 /* Release all TFDs before the SSN, i.e. all TFDs in front of
1375 * block-ack window (we assume that they've been successfully
1376 * transmitted ... if not, it's too late anyway). */
1377 iwl_trans_reclaim(priv->trans, scd_flow, ba_resp_scd_ssn,
1380 IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
1383 (u8 *) &ba_resp->sta_addr_lo32,
1385 IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, "
1386 "scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1387 ba_resp->tid, le16_to_cpu(ba_resp->seq_ctl),
1388 (unsigned long long)le64_to_cpu(ba_resp->bitmap),
1389 scd_flow, ba_resp_scd_ssn, ba_resp->txed,
1390 ba_resp->txed_2_done);
1392 /* Mark that the expected block-ack response arrived */
1393 agg->wait_for_ba = false;
1395 /* Sanity check values reported by uCode */
1396 if (ba_resp->txed_2_done > ba_resp->txed) {
1397 IWL_DEBUG_TX_REPLY(priv,
1398 "bogus sent(%d) and ack(%d) count\n",
1399 ba_resp->txed, ba_resp->txed_2_done);
1401 * set txed_2_done = txed,
1402 * so it won't impact rate scale
1404 ba_resp->txed = ba_resp->txed_2_done;
1407 priv->tid_data[sta_id][tid].next_reclaimed = ba_resp_scd_ssn;
1409 iwlagn_check_ratid_empty(priv, sta_id, tid);
1412 skb_queue_walk(&reclaimed_skbs, skb) {
1413 hdr = (struct ieee80211_hdr *)skb->data;
1415 if (ieee80211_is_data_qos(hdr->frame_control))
1420 info = IEEE80211_SKB_CB(skb);
1421 iwl_trans_free_tx_cmd(priv->trans, info->driver_data[1]);
1424 /* this is the first skb we deliver in this batch */
1425 /* put the rate scaling data there */
1426 info = IEEE80211_SKB_CB(skb);
1427 memset(&info->status, 0, sizeof(info->status));
1428 info->flags |= IEEE80211_TX_STAT_ACK;
1429 info->flags |= IEEE80211_TX_STAT_AMPDU;
1430 info->status.ampdu_ack_len = ba_resp->txed_2_done;
1431 info->status.ampdu_len = ba_resp->txed;
1432 iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags,
1437 spin_unlock_bh(&priv->sta_lock);
1439 while (!skb_queue_empty(&reclaimed_skbs)) {
1440 skb = __skb_dequeue(&reclaimed_skbs);
1441 ieee80211_tx_status_ni(priv->hw, skb);