1 /******************************************************************************
5 * Copyright(c) 2008 - 2014 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 * The full GNU General Public License is included in this distribution
17 * in the file called COPYING.
19 * Contact Information:
20 * Intel Linux Wireless <linuxwifi@intel.com>
21 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
23 *****************************************************************************/
25 #include <linux/kernel.h>
26 #include <linux/module.h>
27 #include <linux/sched.h>
28 #include <linux/ieee80211.h>
30 #include "iwl-trans.h"
31 #include "iwl-agn-hw.h"
35 static const u8 tid_to_ac[] = {
46 static void iwlagn_tx_cmd_protection(struct iwl_priv *priv,
47 struct ieee80211_tx_info *info,
48 __le16 fc, __le32 *tx_flags)
50 if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS ||
51 info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT ||
52 info->flags & IEEE80211_TX_CTL_AMPDU)
53 *tx_flags |= TX_CMD_FLG_PROT_REQUIRE_MSK;
57 * handle build REPLY_TX command notification.
59 static void iwlagn_tx_cmd_build_basic(struct iwl_priv *priv,
61 struct iwl_tx_cmd *tx_cmd,
62 struct ieee80211_tx_info *info,
63 struct ieee80211_hdr *hdr, u8 sta_id)
65 __le16 fc = hdr->frame_control;
66 __le32 tx_flags = tx_cmd->tx_flags;
68 tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
70 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
71 tx_flags |= TX_CMD_FLG_ACK_MSK;
73 tx_flags &= ~TX_CMD_FLG_ACK_MSK;
75 if (ieee80211_is_probe_resp(fc))
76 tx_flags |= TX_CMD_FLG_TSF_MSK;
77 else if (ieee80211_is_back_req(fc))
78 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
79 else if (info->band == NL80211_BAND_2GHZ &&
80 priv->lib->bt_params &&
81 priv->lib->bt_params->advanced_bt_coexist &&
82 (ieee80211_is_auth(fc) || ieee80211_is_assoc_req(fc) ||
83 ieee80211_is_reassoc_req(fc) ||
84 info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO))
85 tx_flags |= TX_CMD_FLG_IGNORE_BT;
88 tx_cmd->sta_id = sta_id;
89 if (ieee80211_has_morefrags(fc))
90 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
92 if (ieee80211_is_data_qos(fc)) {
93 u8 *qc = ieee80211_get_qos_ctl(hdr);
94 tx_cmd->tid_tspec = qc[0] & 0xf;
95 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
97 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
98 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
99 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
101 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
104 iwlagn_tx_cmd_protection(priv, info, fc, &tx_flags);
106 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
107 if (ieee80211_is_mgmt(fc)) {
108 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
109 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
111 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
113 tx_cmd->timeout.pm_frame_timeout = 0;
116 tx_cmd->driver_txop = 0;
117 tx_cmd->tx_flags = tx_flags;
118 tx_cmd->next_frame_len = 0;
121 static void iwlagn_tx_cmd_build_rate(struct iwl_priv *priv,
122 struct iwl_tx_cmd *tx_cmd,
123 struct ieee80211_tx_info *info,
124 struct ieee80211_sta *sta,
134 rts_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
135 data_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
137 /* Set retry limit on RTS packets */
138 rts_retry_limit = IWLAGN_RTS_DFAULT_RETRY_LIMIT;
140 /* Set retry limit on DATA packets and Probe Responses*/
141 if (ieee80211_is_probe_resp(fc)) {
142 data_retry_limit = IWLAGN_MGMT_DFAULT_RETRY_LIMIT;
144 min(data_retry_limit, rts_retry_limit);
145 } else if (ieee80211_is_back_req(fc))
146 data_retry_limit = IWLAGN_BAR_DFAULT_RETRY_LIMIT;
148 data_retry_limit = IWLAGN_DEFAULT_TX_RETRY;
151 tx_cmd->data_retry_limit = data_retry_limit;
152 tx_cmd->rts_retry_limit = rts_retry_limit;
154 /* DATA packets will use the uCode station table for rate/antenna
156 if (ieee80211_is_data(fc)) {
157 tx_cmd->initial_rate_index = 0;
158 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
160 } else if (ieee80211_is_back_req(fc))
161 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
164 * If the current TX rate stored in mac80211 has the MCS bit set, it's
165 * not really a TX rate. Thus, we use the lowest supported rate for
166 * this band. Also use the lowest supported rate if the stored rate
169 rate_idx = info->control.rates[0].idx;
170 if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS ||
171 (rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY))
172 rate_idx = rate_lowest_index(
173 &priv->nvm_data->bands[info->band], sta);
174 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
175 if (info->band == NL80211_BAND_5GHZ)
176 rate_idx += IWL_FIRST_OFDM_RATE;
177 /* Get PLCP rate for tx_cmd->rate_n_flags */
178 rate_plcp = iwl_rates[rate_idx].plcp;
179 /* Zero out flags for this packet */
182 /* Set CCK flag as needed */
183 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
184 rate_flags |= RATE_MCS_CCK_MSK;
186 /* Set up antennas */
187 if (priv->lib->bt_params &&
188 priv->lib->bt_params->advanced_bt_coexist &&
189 priv->bt_full_concurrent) {
190 /* operated as 1x1 in full concurrency mode */
191 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
192 first_antenna(priv->nvm_data->valid_tx_ant));
194 priv->mgmt_tx_ant = iwl_toggle_tx_ant(
195 priv, priv->mgmt_tx_ant,
196 priv->nvm_data->valid_tx_ant);
197 rate_flags |= iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
199 /* Set the rate in the TX cmd */
200 tx_cmd->rate_n_flags = iwl_hw_set_rate_n_flags(rate_plcp, rate_flags);
203 static void iwlagn_tx_cmd_build_hwcrypto(struct iwl_priv *priv,
204 struct ieee80211_tx_info *info,
205 struct iwl_tx_cmd *tx_cmd,
206 struct sk_buff *skb_frag)
208 struct ieee80211_key_conf *keyconf = info->control.hw_key;
210 switch (keyconf->cipher) {
211 case WLAN_CIPHER_SUITE_CCMP:
212 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
213 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
214 if (info->flags & IEEE80211_TX_CTL_AMPDU)
215 tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
218 case WLAN_CIPHER_SUITE_TKIP:
219 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
220 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
223 case WLAN_CIPHER_SUITE_WEP104:
224 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
226 case WLAN_CIPHER_SUITE_WEP40:
227 tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP |
228 (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
230 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
232 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
233 "with key %d\n", keyconf->keyidx);
237 IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher);
243 * iwl_sta_id_or_broadcast - return sta_id or broadcast sta
244 * @context: the current context
245 * @sta: mac80211 station
247 * In certain circumstances mac80211 passes a station pointer
248 * that may be %NULL, for example during TX or key setup. In
249 * that case, we need to use the broadcast station, so this
250 * inline wraps that pattern.
252 static int iwl_sta_id_or_broadcast(struct iwl_rxon_context *context,
253 struct ieee80211_sta *sta)
258 return context->bcast_sta_id;
260 sta_id = iwl_sta_id(sta);
263 * mac80211 should not be passing a partially
264 * initialised station!
266 WARN_ON(sta_id == IWL_INVALID_STATION);
272 * start REPLY_TX command process
274 int iwlagn_tx_skb(struct iwl_priv *priv,
275 struct ieee80211_sta *sta,
278 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
279 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
280 struct iwl_station_priv *sta_priv = NULL;
281 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
282 struct iwl_device_cmd *dev_cmd;
283 struct iwl_tx_cmd *tx_cmd;
286 u16 len, seq_number = 0;
287 u8 sta_id, tid = IWL_MAX_TID_COUNT;
288 bool is_agg = false, is_data_qos = false;
291 if (info->control.vif)
292 ctx = iwl_rxon_ctx_from_vif(info->control.vif);
294 if (iwl_is_rfkill(priv)) {
295 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
296 goto drop_unlock_priv;
299 fc = hdr->frame_control;
301 #ifdef CONFIG_IWLWIFI_DEBUG
302 if (ieee80211_is_auth(fc))
303 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
304 else if (ieee80211_is_assoc_req(fc))
305 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
306 else if (ieee80211_is_reassoc_req(fc))
307 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
310 if (unlikely(ieee80211_is_probe_resp(fc))) {
311 struct iwl_wipan_noa_data *noa_data =
312 rcu_dereference(priv->noa_data);
315 pskb_expand_head(skb, 0, noa_data->length,
317 skb_put_data(skb, noa_data->data, noa_data->length);
318 hdr = (struct ieee80211_hdr *)skb->data;
322 hdr_len = ieee80211_hdrlen(fc);
324 /* For management frames use broadcast id to do not break aggregation */
325 if (!ieee80211_is_data(fc))
326 sta_id = ctx->bcast_sta_id;
328 /* Find index into station table for destination station */
329 sta_id = iwl_sta_id_or_broadcast(ctx, sta);
330 if (sta_id == IWL_INVALID_STATION) {
331 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
333 goto drop_unlock_priv;
338 sta_priv = (void *)sta->drv_priv;
340 if (sta_priv && sta_priv->asleep &&
341 (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)) {
343 * This sends an asynchronous command to the device,
344 * but we can rely on it being processed before the
345 * next frame is processed -- and the next frame to
346 * this station is the one that will consume this
348 * For now set the counter to just 1 since we do not
351 * FIXME: If we get two non-bufferable frames one
352 * after the other, we might only send out one of
353 * them because this is racy.
355 iwl_sta_modify_sleep_tx_count(priv, sta_id, 1);
358 dev_cmd = iwl_trans_alloc_tx_cmd(priv->trans);
360 if (unlikely(!dev_cmd))
361 goto drop_unlock_priv;
363 memset(dev_cmd, 0, sizeof(*dev_cmd));
364 dev_cmd->hdr.cmd = REPLY_TX;
365 tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload;
367 /* Total # bytes to be transmitted */
369 tx_cmd->len = cpu_to_le16(len);
371 if (info->control.hw_key)
372 iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb);
374 /* TODO need this for burst mode later on */
375 iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id);
377 iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, sta, fc);
379 memset(&info->status, 0, sizeof(info->status));
380 memset(info->driver_data, 0, sizeof(info->driver_data));
382 info->driver_data[0] = ctx;
383 info->driver_data[1] = dev_cmd;
384 /* From now on, we cannot access info->control */
386 spin_lock(&priv->sta_lock);
388 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
390 struct iwl_tid_data *tid_data;
391 qc = ieee80211_get_qos_ctl(hdr);
392 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
393 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
394 goto drop_unlock_sta;
395 tid_data = &priv->tid_data[sta_id][tid];
397 /* aggregation is on for this <sta,tid> */
398 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
399 tid_data->agg.state != IWL_AGG_ON) {
401 "TX_CTL_AMPDU while not in AGG: Tx flags = 0x%08x, agg.state = %d\n",
402 info->flags, tid_data->agg.state);
403 IWL_ERR(priv, "sta_id = %d, tid = %d seq_num = %d\n",
405 IEEE80211_SEQ_TO_SN(tid_data->seq_number));
406 goto drop_unlock_sta;
409 /* We can receive packets from the stack in IWL_AGG_{ON,OFF}
410 * only. Check this here.
412 if (WARN_ONCE(tid_data->agg.state != IWL_AGG_ON &&
413 tid_data->agg.state != IWL_AGG_OFF,
414 "Tx while agg.state = %d\n", tid_data->agg.state))
415 goto drop_unlock_sta;
417 seq_number = tid_data->seq_number;
418 seq_number &= IEEE80211_SCTL_SEQ;
419 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
420 hdr->seq_ctrl |= cpu_to_le16(seq_number);
423 if (info->flags & IEEE80211_TX_CTL_AMPDU)
428 /* Copy MAC header from skb into command buffer */
429 memcpy(tx_cmd->hdr, hdr, hdr_len);
431 txq_id = info->hw_queue;
434 txq_id = priv->tid_data[sta_id][tid].agg.txq_id;
435 else if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
437 * The microcode will clear the more data
438 * bit in the last frame it transmits.
440 hdr->frame_control |=
441 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
444 WARN_ON_ONCE(is_agg &&
445 priv->queue_to_mac80211[txq_id] != info->hw_queue);
447 IWL_DEBUG_TX(priv, "TX to [%d|%d] Q:%d - seq: 0x%x\n", sta_id, tid,
450 if (iwl_trans_tx(priv->trans, skb, dev_cmd, txq_id))
451 goto drop_unlock_sta;
453 if (is_data_qos && !ieee80211_has_morefrags(fc))
454 priv->tid_data[sta_id][tid].seq_number = seq_number;
456 spin_unlock(&priv->sta_lock);
459 * Avoid atomic ops if it isn't an associated client.
460 * Also, if this is a packet for aggregation, don't
461 * increase the counter because the ucode will stop
462 * aggregation queues when their respective station
465 if (sta_priv && sta_priv->client && !is_agg)
466 atomic_inc(&sta_priv->pending_frames);
472 iwl_trans_free_tx_cmd(priv->trans, dev_cmd);
473 spin_unlock(&priv->sta_lock);
478 static int iwlagn_alloc_agg_txq(struct iwl_priv *priv, int mq)
482 for (q = IWLAGN_FIRST_AMPDU_QUEUE;
483 q < priv->cfg->base_params->num_of_queues; q++) {
484 if (!test_and_set_bit(q, priv->agg_q_alloc)) {
485 priv->queue_to_mac80211[q] = mq;
493 static void iwlagn_dealloc_agg_txq(struct iwl_priv *priv, int q)
495 clear_bit(q, priv->agg_q_alloc);
496 priv->queue_to_mac80211[q] = IWL_INVALID_MAC80211_QUEUE;
499 int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif,
500 struct ieee80211_sta *sta, u16 tid)
502 struct iwl_tid_data *tid_data;
504 enum iwl_agg_state agg_state;
506 sta_id = iwl_sta_id(sta);
508 if (sta_id == IWL_INVALID_STATION) {
509 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
513 spin_lock_bh(&priv->sta_lock);
515 tid_data = &priv->tid_data[sta_id][tid];
516 txq_id = tid_data->agg.txq_id;
518 switch (tid_data->agg.state) {
519 case IWL_EMPTYING_HW_QUEUE_ADDBA:
521 * This can happen if the peer stops aggregation
522 * again before we've had a chance to drain the
523 * queue we selected previously, i.e. before the
524 * session was really started completely.
526 IWL_DEBUG_HT(priv, "AGG stop before setup done\n");
528 case IWL_AGG_STARTING:
530 * This can happen when the session is stopped before
531 * we receive ADDBA response
533 IWL_DEBUG_HT(priv, "AGG stop before AGG became operational\n");
539 "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
540 sta_id, tid, tid_data->agg.state);
541 spin_unlock_bh(&priv->sta_lock);
545 tid_data->agg.ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
547 /* There are still packets for this RA / TID in the HW */
548 if (!test_bit(txq_id, priv->agg_q_alloc)) {
549 IWL_DEBUG_TX_QUEUES(priv,
550 "stopping AGG on STA/TID %d/%d but hwq %d not used\n",
551 sta_id, tid, txq_id);
552 } else if (tid_data->agg.ssn != tid_data->next_reclaimed) {
553 IWL_DEBUG_TX_QUEUES(priv,
554 "Can't proceed: ssn %d, next_recl = %d\n",
556 tid_data->next_reclaimed);
557 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_DELBA;
558 spin_unlock_bh(&priv->sta_lock);
562 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n",
565 agg_state = tid_data->agg.state;
566 tid_data->agg.state = IWL_AGG_OFF;
568 spin_unlock_bh(&priv->sta_lock);
570 if (test_bit(txq_id, priv->agg_q_alloc)) {
572 * If the transport didn't know that we wanted to start
573 * agreggation, don't tell it that we want to stop them.
574 * This can happen when we don't get the addBA response on
575 * time, or we hadn't time to drain the AC queues.
577 if (agg_state == IWL_AGG_ON)
578 iwl_trans_txq_disable(priv->trans, txq_id, true);
580 IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n",
582 iwlagn_dealloc_agg_txq(priv, txq_id);
585 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
590 int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
591 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
593 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
594 struct iwl_tid_data *tid_data;
595 int sta_id, txq_id, ret;
597 IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n",
600 sta_id = iwl_sta_id(sta);
601 if (sta_id == IWL_INVALID_STATION) {
602 IWL_ERR(priv, "Start AGG on invalid station\n");
605 if (unlikely(tid >= IWL_MAX_TID_COUNT))
608 if (priv->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) {
609 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
613 txq_id = iwlagn_alloc_agg_txq(priv, ctx->ac_to_queue[tid_to_ac[tid]]);
615 IWL_DEBUG_TX_QUEUES(priv,
616 "No free aggregation queue for %pM/%d\n",
621 ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
625 spin_lock_bh(&priv->sta_lock);
626 tid_data = &priv->tid_data[sta_id][tid];
627 tid_data->agg.ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
628 tid_data->agg.txq_id = txq_id;
630 *ssn = tid_data->agg.ssn;
632 if (*ssn == tid_data->next_reclaimed) {
633 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n",
635 tid_data->agg.state = IWL_AGG_STARTING;
636 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
638 IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, "
639 "next_reclaimed = %d\n",
641 tid_data->next_reclaimed);
642 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
644 spin_unlock_bh(&priv->sta_lock);
649 int iwlagn_tx_agg_flush(struct iwl_priv *priv, struct ieee80211_vif *vif,
650 struct ieee80211_sta *sta, u16 tid)
652 struct iwl_tid_data *tid_data;
653 enum iwl_agg_state agg_state;
655 sta_id = iwl_sta_id(sta);
658 * First set the agg state to OFF to avoid calling
659 * ieee80211_stop_tx_ba_cb in iwlagn_check_ratid_empty.
661 spin_lock_bh(&priv->sta_lock);
663 tid_data = &priv->tid_data[sta_id][tid];
664 txq_id = tid_data->agg.txq_id;
665 agg_state = tid_data->agg.state;
666 IWL_DEBUG_TX_QUEUES(priv, "Flush AGG: sta %d tid %d q %d state %d\n",
667 sta_id, tid, txq_id, tid_data->agg.state);
669 tid_data->agg.state = IWL_AGG_OFF;
671 spin_unlock_bh(&priv->sta_lock);
673 if (iwlagn_txfifo_flush(priv, BIT(txq_id)))
674 IWL_ERR(priv, "Couldn't flush the AGG queue\n");
676 if (test_bit(txq_id, priv->agg_q_alloc)) {
678 * If the transport didn't know that we wanted to start
679 * agreggation, don't tell it that we want to stop them.
680 * This can happen when we don't get the addBA response on
681 * time, or we hadn't time to drain the AC queues.
683 if (agg_state == IWL_AGG_ON)
684 iwl_trans_txq_disable(priv->trans, txq_id, true);
686 IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n",
688 iwlagn_dealloc_agg_txq(priv, txq_id);
694 int iwlagn_tx_agg_oper(struct iwl_priv *priv, struct ieee80211_vif *vif,
695 struct ieee80211_sta *sta, u16 tid, u8 buf_size)
697 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
698 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
702 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
704 spin_lock_bh(&priv->sta_lock);
705 ssn = priv->tid_data[sta_priv->sta_id][tid].agg.ssn;
706 q = priv->tid_data[sta_priv->sta_id][tid].agg.txq_id;
707 priv->tid_data[sta_priv->sta_id][tid].agg.state = IWL_AGG_ON;
708 spin_unlock_bh(&priv->sta_lock);
710 fifo = ctx->ac_to_fifo[tid_to_ac[tid]];
712 iwl_trans_txq_enable(priv->trans, q, fifo, sta_priv->sta_id, tid,
716 * If the limit is 0, then it wasn't initialised yet,
717 * use the default. We can do that since we take the
718 * minimum below, and we don't want to go above our
719 * default due to hardware restrictions.
721 if (sta_priv->max_agg_bufsize == 0)
722 sta_priv->max_agg_bufsize =
723 LINK_QUAL_AGG_FRAME_LIMIT_DEF;
726 * Even though in theory the peer could have different
727 * aggregation reorder buffer sizes for different sessions,
728 * our ucode doesn't allow for that and has a global limit
729 * for each station. Therefore, use the minimum of all the
730 * aggregation sessions and our default value.
732 sta_priv->max_agg_bufsize =
733 min(sta_priv->max_agg_bufsize, buf_size);
735 if (priv->hw_params.use_rts_for_aggregation) {
737 * switch to RTS/CTS if it is the prefer protection
738 * method for HT traffic
741 sta_priv->lq_sta.lq.general_params.flags |=
742 LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
744 priv->agg_tids_count++;
745 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
746 priv->agg_tids_count);
748 sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit =
749 sta_priv->max_agg_bufsize;
751 IWL_DEBUG_HT(priv, "Tx aggregation enabled on ra = %pM tid = %d\n",
754 return iwl_send_lq_cmd(priv, ctx,
755 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
758 static void iwlagn_check_ratid_empty(struct iwl_priv *priv, int sta_id, u8 tid)
760 struct iwl_tid_data *tid_data = &priv->tid_data[sta_id][tid];
761 enum iwl_rxon_context_id ctx;
762 struct ieee80211_vif *vif;
765 lockdep_assert_held(&priv->sta_lock);
767 addr = priv->stations[sta_id].sta.sta.addr;
768 ctx = priv->stations[sta_id].ctxid;
769 vif = priv->contexts[ctx].vif;
771 switch (priv->tid_data[sta_id][tid].agg.state) {
772 case IWL_EMPTYING_HW_QUEUE_DELBA:
773 /* There are no packets for this RA / TID in the HW any more */
774 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
775 IWL_DEBUG_TX_QUEUES(priv,
776 "Can continue DELBA flow ssn = next_recl = %d\n",
777 tid_data->next_reclaimed);
778 iwl_trans_txq_disable(priv->trans,
779 tid_data->agg.txq_id, true);
780 iwlagn_dealloc_agg_txq(priv, tid_data->agg.txq_id);
781 tid_data->agg.state = IWL_AGG_OFF;
782 ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid);
785 case IWL_EMPTYING_HW_QUEUE_ADDBA:
786 /* There are no packets for this RA / TID in the HW any more */
787 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
788 IWL_DEBUG_TX_QUEUES(priv,
789 "Can continue ADDBA flow ssn = next_recl = %d\n",
790 tid_data->next_reclaimed);
791 tid_data->agg.state = IWL_AGG_STARTING;
792 ieee80211_start_tx_ba_cb_irqsafe(vif, addr, tid);
800 static void iwlagn_non_agg_tx_status(struct iwl_priv *priv,
801 struct iwl_rxon_context *ctx,
804 struct ieee80211_sta *sta;
805 struct iwl_station_priv *sta_priv;
808 sta = ieee80211_find_sta(ctx->vif, addr1);
810 sta_priv = (void *)sta->drv_priv;
811 /* avoid atomic ops if this isn't a client */
812 if (sta_priv->client &&
813 atomic_dec_return(&sta_priv->pending_frames) == 0)
814 ieee80211_sta_block_awake(priv->hw, sta, false);
820 * translate ucode response to mac80211 tx status control values
822 static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
823 struct ieee80211_tx_info *info)
825 struct ieee80211_tx_rate *r = &info->status.rates[0];
827 info->status.antenna =
828 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
829 if (rate_n_flags & RATE_MCS_HT_MSK)
830 r->flags |= IEEE80211_TX_RC_MCS;
831 if (rate_n_flags & RATE_MCS_GF_MSK)
832 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
833 if (rate_n_flags & RATE_MCS_HT40_MSK)
834 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
835 if (rate_n_flags & RATE_MCS_DUP_MSK)
836 r->flags |= IEEE80211_TX_RC_DUP_DATA;
837 if (rate_n_flags & RATE_MCS_SGI_MSK)
838 r->flags |= IEEE80211_TX_RC_SHORT_GI;
839 r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band);
842 #ifdef CONFIG_IWLWIFI_DEBUG
843 const char *iwl_get_tx_fail_reason(u32 status)
845 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
846 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
848 switch (status & TX_STATUS_MSK) {
849 case TX_STATUS_SUCCESS:
851 TX_STATUS_POSTPONE(DELAY);
852 TX_STATUS_POSTPONE(FEW_BYTES);
853 TX_STATUS_POSTPONE(BT_PRIO);
854 TX_STATUS_POSTPONE(QUIET_PERIOD);
855 TX_STATUS_POSTPONE(CALC_TTAK);
856 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
857 TX_STATUS_FAIL(SHORT_LIMIT);
858 TX_STATUS_FAIL(LONG_LIMIT);
859 TX_STATUS_FAIL(FIFO_UNDERRUN);
860 TX_STATUS_FAIL(DRAIN_FLOW);
861 TX_STATUS_FAIL(RFKILL_FLUSH);
862 TX_STATUS_FAIL(LIFE_EXPIRE);
863 TX_STATUS_FAIL(DEST_PS);
864 TX_STATUS_FAIL(HOST_ABORTED);
865 TX_STATUS_FAIL(BT_RETRY);
866 TX_STATUS_FAIL(STA_INVALID);
867 TX_STATUS_FAIL(FRAG_DROPPED);
868 TX_STATUS_FAIL(TID_DISABLE);
869 TX_STATUS_FAIL(FIFO_FLUSHED);
870 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
871 TX_STATUS_FAIL(PASSIVE_NO_RX);
872 TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
877 #undef TX_STATUS_FAIL
878 #undef TX_STATUS_POSTPONE
880 #endif /* CONFIG_IWLWIFI_DEBUG */
882 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
884 status &= AGG_TX_STATUS_MSK;
887 case AGG_TX_STATE_UNDERRUN_MSK:
888 priv->reply_agg_tx_stats.underrun++;
890 case AGG_TX_STATE_BT_PRIO_MSK:
891 priv->reply_agg_tx_stats.bt_prio++;
893 case AGG_TX_STATE_FEW_BYTES_MSK:
894 priv->reply_agg_tx_stats.few_bytes++;
896 case AGG_TX_STATE_ABORT_MSK:
897 priv->reply_agg_tx_stats.abort++;
899 case AGG_TX_STATE_LAST_SENT_TTL_MSK:
900 priv->reply_agg_tx_stats.last_sent_ttl++;
902 case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
903 priv->reply_agg_tx_stats.last_sent_try++;
905 case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
906 priv->reply_agg_tx_stats.last_sent_bt_kill++;
908 case AGG_TX_STATE_SCD_QUERY_MSK:
909 priv->reply_agg_tx_stats.scd_query++;
911 case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
912 priv->reply_agg_tx_stats.bad_crc32++;
914 case AGG_TX_STATE_RESPONSE_MSK:
915 priv->reply_agg_tx_stats.response++;
917 case AGG_TX_STATE_DUMP_TX_MSK:
918 priv->reply_agg_tx_stats.dump_tx++;
920 case AGG_TX_STATE_DELAY_TX_MSK:
921 priv->reply_agg_tx_stats.delay_tx++;
924 priv->reply_agg_tx_stats.unknown++;
929 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
931 return le32_to_cpup((__le32 *)&tx_resp->status +
932 tx_resp->frame_count) & IEEE80211_MAX_SN;
935 static void iwl_rx_reply_tx_agg(struct iwl_priv *priv,
936 struct iwlagn_tx_resp *tx_resp)
938 struct agg_tx_status *frame_status = &tx_resp->status;
939 int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
940 IWLAGN_TX_RES_TID_POS;
941 int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
942 IWLAGN_TX_RES_RA_POS;
943 struct iwl_ht_agg *agg = &priv->tid_data[sta_id][tid].agg;
944 u32 status = le16_to_cpu(tx_resp->status.status);
947 WARN_ON(tid == IWL_TID_NON_QOS);
949 if (agg->wait_for_ba)
950 IWL_DEBUG_TX_REPLY(priv,
951 "got tx response w/o block-ack\n");
953 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
954 agg->wait_for_ba = (tx_resp->frame_count > 1);
957 * If the BT kill count is non-zero, we'll get this
958 * notification again.
960 if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
961 priv->lib->bt_params &&
962 priv->lib->bt_params->advanced_bt_coexist) {
963 IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n");
966 if (tx_resp->frame_count == 1)
969 IWL_DEBUG_TX_REPLY(priv, "TXQ %d initial_rate 0x%x ssn %d frm_cnt %d\n",
971 le32_to_cpu(tx_resp->rate_n_flags),
972 iwlagn_get_scd_ssn(tx_resp), tx_resp->frame_count);
974 /* Construct bit-map of pending frames within Tx window */
975 for (i = 0; i < tx_resp->frame_count; i++) {
976 u16 fstatus = le16_to_cpu(frame_status[i].status);
977 u8 retry_cnt = (fstatus & AGG_TX_TRY_MSK) >> AGG_TX_TRY_POS;
979 if (status & AGG_TX_STATUS_MSK)
980 iwlagn_count_agg_tx_err_status(priv, fstatus);
982 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
983 AGG_TX_STATE_ABORT_MSK))
986 if (status & AGG_TX_STATUS_MSK || retry_cnt > 1)
987 IWL_DEBUG_TX_REPLY(priv,
988 "%d: status %s (0x%04x), try-count (0x%01x)\n",
990 iwl_get_agg_tx_fail_reason(fstatus),
991 fstatus & AGG_TX_STATUS_MSK,
996 #ifdef CONFIG_IWLWIFI_DEBUG
997 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
999 const char *iwl_get_agg_tx_fail_reason(u16 status)
1001 status &= AGG_TX_STATUS_MSK;
1003 case AGG_TX_STATE_TRANSMITTED:
1005 AGG_TX_STATE_FAIL(UNDERRUN_MSK);
1006 AGG_TX_STATE_FAIL(BT_PRIO_MSK);
1007 AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
1008 AGG_TX_STATE_FAIL(ABORT_MSK);
1009 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
1010 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
1011 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
1012 AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
1013 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
1014 AGG_TX_STATE_FAIL(RESPONSE_MSK);
1015 AGG_TX_STATE_FAIL(DUMP_TX_MSK);
1016 AGG_TX_STATE_FAIL(DELAY_TX_MSK);
1021 #endif /* CONFIG_IWLWIFI_DEBUG */
1023 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
1025 status &= TX_STATUS_MSK;
1028 case TX_STATUS_POSTPONE_DELAY:
1029 priv->reply_tx_stats.pp_delay++;
1031 case TX_STATUS_POSTPONE_FEW_BYTES:
1032 priv->reply_tx_stats.pp_few_bytes++;
1034 case TX_STATUS_POSTPONE_BT_PRIO:
1035 priv->reply_tx_stats.pp_bt_prio++;
1037 case TX_STATUS_POSTPONE_QUIET_PERIOD:
1038 priv->reply_tx_stats.pp_quiet_period++;
1040 case TX_STATUS_POSTPONE_CALC_TTAK:
1041 priv->reply_tx_stats.pp_calc_ttak++;
1043 case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
1044 priv->reply_tx_stats.int_crossed_retry++;
1046 case TX_STATUS_FAIL_SHORT_LIMIT:
1047 priv->reply_tx_stats.short_limit++;
1049 case TX_STATUS_FAIL_LONG_LIMIT:
1050 priv->reply_tx_stats.long_limit++;
1052 case TX_STATUS_FAIL_FIFO_UNDERRUN:
1053 priv->reply_tx_stats.fifo_underrun++;
1055 case TX_STATUS_FAIL_DRAIN_FLOW:
1056 priv->reply_tx_stats.drain_flow++;
1058 case TX_STATUS_FAIL_RFKILL_FLUSH:
1059 priv->reply_tx_stats.rfkill_flush++;
1061 case TX_STATUS_FAIL_LIFE_EXPIRE:
1062 priv->reply_tx_stats.life_expire++;
1064 case TX_STATUS_FAIL_DEST_PS:
1065 priv->reply_tx_stats.dest_ps++;
1067 case TX_STATUS_FAIL_HOST_ABORTED:
1068 priv->reply_tx_stats.host_abort++;
1070 case TX_STATUS_FAIL_BT_RETRY:
1071 priv->reply_tx_stats.bt_retry++;
1073 case TX_STATUS_FAIL_STA_INVALID:
1074 priv->reply_tx_stats.sta_invalid++;
1076 case TX_STATUS_FAIL_FRAG_DROPPED:
1077 priv->reply_tx_stats.frag_drop++;
1079 case TX_STATUS_FAIL_TID_DISABLE:
1080 priv->reply_tx_stats.tid_disable++;
1082 case TX_STATUS_FAIL_FIFO_FLUSHED:
1083 priv->reply_tx_stats.fifo_flush++;
1085 case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
1086 priv->reply_tx_stats.insuff_cf_poll++;
1088 case TX_STATUS_FAIL_PASSIVE_NO_RX:
1089 priv->reply_tx_stats.fail_hw_drop++;
1091 case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
1092 priv->reply_tx_stats.sta_color_mismatch++;
1095 priv->reply_tx_stats.unknown++;
1100 static void iwlagn_set_tx_status(struct iwl_priv *priv,
1101 struct ieee80211_tx_info *info,
1102 struct iwlagn_tx_resp *tx_resp)
1104 u16 status = le16_to_cpu(tx_resp->status.status);
1106 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1108 info->status.rates[0].count = tx_resp->failure_frame + 1;
1109 info->flags |= iwl_tx_status_to_mac80211(status);
1110 iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
1112 if (!iwl_is_tx_success(status))
1113 iwlagn_count_tx_err_status(priv, status);
1116 static void iwl_check_abort_status(struct iwl_priv *priv,
1117 u8 frame_count, u32 status)
1119 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
1120 IWL_ERR(priv, "Tx flush command to flush out all frames\n");
1121 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
1122 queue_work(priv->workqueue, &priv->tx_flush);
1126 void iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb)
1128 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1129 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1130 int txq_id = SEQ_TO_QUEUE(sequence);
1131 int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence);
1132 struct iwlagn_tx_resp *tx_resp = (void *)pkt->data;
1133 struct ieee80211_hdr *hdr;
1134 u32 status = le16_to_cpu(tx_resp->status.status);
1135 u16 ssn = iwlagn_get_scd_ssn(tx_resp);
1139 struct ieee80211_tx_info *info;
1140 struct sk_buff_head skbs;
1141 struct sk_buff *skb;
1142 struct iwl_rxon_context *ctx;
1143 bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE);
1145 tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
1146 IWLAGN_TX_RES_TID_POS;
1147 sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
1148 IWLAGN_TX_RES_RA_POS;
1150 spin_lock_bh(&priv->sta_lock);
1153 WARN_ON_ONCE(sta_id >= IWLAGN_STATION_COUNT ||
1154 tid >= IWL_MAX_TID_COUNT);
1155 if (txq_id != priv->tid_data[sta_id][tid].agg.txq_id)
1156 IWL_ERR(priv, "txq_id mismatch: %d %d\n", txq_id,
1157 priv->tid_data[sta_id][tid].agg.txq_id);
1158 iwl_rx_reply_tx_agg(priv, tx_resp);
1161 __skb_queue_head_init(&skbs);
1163 if (tx_resp->frame_count == 1) {
1164 u16 next_reclaimed = le16_to_cpu(tx_resp->seq_ctl);
1165 next_reclaimed = IEEE80211_SEQ_TO_SN(next_reclaimed + 0x10);
1168 /* If this is an aggregation queue, we can rely on the
1169 * ssn since the wifi sequence number corresponds to
1170 * the index in the TFD ring (%256).
1171 * The seq_ctl is the sequence control of the packet
1172 * to which this Tx response relates. But if there is a
1173 * hole in the bitmap of the BA we received, this Tx
1174 * response may allow to reclaim the hole and all the
1175 * subsequent packets that were already acked.
1176 * In that case, seq_ctl != ssn, and the next packet
1177 * to be reclaimed will be ssn and not seq_ctl.
1179 next_reclaimed = ssn;
1182 if (tid != IWL_TID_NON_QOS) {
1183 priv->tid_data[sta_id][tid].next_reclaimed =
1185 IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d\n",
1187 iwlagn_check_ratid_empty(priv, sta_id, tid);
1190 iwl_trans_reclaim(priv->trans, txq_id, ssn, &skbs);
1194 /* process frames */
1195 skb_queue_walk(&skbs, skb) {
1196 hdr = (struct ieee80211_hdr *)skb->data;
1198 if (!ieee80211_is_data_qos(hdr->frame_control))
1199 priv->last_seq_ctl = tx_resp->seq_ctl;
1201 info = IEEE80211_SKB_CB(skb);
1202 ctx = info->driver_data[0];
1203 iwl_trans_free_tx_cmd(priv->trans,
1204 info->driver_data[1]);
1206 memset(&info->status, 0, sizeof(info->status));
1208 if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
1210 ctx->vif->type == NL80211_IFTYPE_STATION) {
1211 /* block and stop all queues */
1212 priv->passive_no_rx = true;
1213 IWL_DEBUG_TX_QUEUES(priv,
1214 "stop all queues: passive channel\n");
1215 ieee80211_stop_queues(priv->hw);
1217 IWL_DEBUG_TX_REPLY(priv,
1218 "TXQ %d status %s (0x%08x) "
1219 "rate_n_flags 0x%x retries %d\n",
1221 iwl_get_tx_fail_reason(status),
1223 le32_to_cpu(tx_resp->rate_n_flags),
1224 tx_resp->failure_frame);
1226 IWL_DEBUG_TX_REPLY(priv,
1227 "FrameCnt = %d, idx=%d\n",
1228 tx_resp->frame_count, cmd_index);
1231 /* check if BAR is needed */
1232 if (is_agg && !iwl_is_tx_success(status))
1233 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1234 iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb),
1237 iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1);
1242 if (tid != IWL_TID_NON_QOS) {
1243 priv->tid_data[sta_id][tid].next_reclaimed =
1245 IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d\n",
1249 if (!is_agg && freed != 1)
1250 IWL_ERR(priv, "Q: %d, freed %d\n", txq_id, freed);
1252 IWL_DEBUG_TX_REPLY(priv, "TXQ %d status %s (0x%08x)\n", txq_id,
1253 iwl_get_tx_fail_reason(status), status);
1255 IWL_DEBUG_TX_REPLY(priv,
1256 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d seq_ctl=0x%x\n",
1257 le32_to_cpu(tx_resp->rate_n_flags),
1258 tx_resp->failure_frame,
1259 SEQ_TO_INDEX(sequence), ssn,
1260 le16_to_cpu(tx_resp->seq_ctl));
1263 iwl_check_abort_status(priv, tx_resp->frame_count, status);
1264 spin_unlock_bh(&priv->sta_lock);
1266 while (!skb_queue_empty(&skbs)) {
1267 skb = __skb_dequeue(&skbs);
1268 ieee80211_tx_status(priv->hw, skb);
1273 * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
1275 * Handles block-acknowledge notification from device, which reports success
1276 * of frames sent via aggregation.
1278 void iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
1279 struct iwl_rx_cmd_buffer *rxb)
1281 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1282 struct iwl_compressed_ba_resp *ba_resp = (void *)pkt->data;
1283 struct iwl_ht_agg *agg;
1284 struct sk_buff_head reclaimed_skbs;
1285 struct sk_buff *skb;
1290 /* "flow" corresponds to Tx queue */
1291 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
1293 /* "ssn" is start of block-ack Tx window, corresponds to index
1294 * (in Tx queue's circular buffer) of first TFD/frame in window */
1295 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
1297 if (scd_flow >= priv->cfg->base_params->num_of_queues) {
1299 "BUG_ON scd_flow is bigger than number of queues\n");
1303 sta_id = ba_resp->sta_id;
1305 agg = &priv->tid_data[sta_id][tid].agg;
1307 spin_lock_bh(&priv->sta_lock);
1309 if (unlikely(!agg->wait_for_ba)) {
1310 if (unlikely(ba_resp->bitmap))
1311 IWL_ERR(priv, "Received BA when not expected\n");
1312 spin_unlock_bh(&priv->sta_lock);
1316 if (unlikely(scd_flow != agg->txq_id)) {
1318 * FIXME: this is a uCode bug which need to be addressed,
1319 * log the information and return for now.
1320 * Since it is can possibly happen very often and in order
1321 * not to fill the syslog, don't use IWL_ERR or IWL_WARN
1323 IWL_DEBUG_TX_QUEUES(priv,
1324 "Bad queue mapping txq_id=%d, agg_txq[sta:%d,tid:%d]=%d\n",
1325 scd_flow, sta_id, tid, agg->txq_id);
1326 spin_unlock_bh(&priv->sta_lock);
1330 __skb_queue_head_init(&reclaimed_skbs);
1332 /* Release all TFDs before the SSN, i.e. all TFDs in front of
1333 * block-ack window (we assume that they've been successfully
1334 * transmitted ... if not, it's too late anyway). */
1335 iwl_trans_reclaim(priv->trans, scd_flow, ba_resp_scd_ssn,
1338 IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
1341 (u8 *) &ba_resp->sta_addr_lo32,
1343 IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, "
1344 "scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1345 ba_resp->tid, le16_to_cpu(ba_resp->seq_ctl),
1346 (unsigned long long)le64_to_cpu(ba_resp->bitmap),
1347 scd_flow, ba_resp_scd_ssn, ba_resp->txed,
1348 ba_resp->txed_2_done);
1350 /* Mark that the expected block-ack response arrived */
1351 agg->wait_for_ba = false;
1353 /* Sanity check values reported by uCode */
1354 if (ba_resp->txed_2_done > ba_resp->txed) {
1355 IWL_DEBUG_TX_REPLY(priv,
1356 "bogus sent(%d) and ack(%d) count\n",
1357 ba_resp->txed, ba_resp->txed_2_done);
1359 * set txed_2_done = txed,
1360 * so it won't impact rate scale
1362 ba_resp->txed = ba_resp->txed_2_done;
1365 priv->tid_data[sta_id][tid].next_reclaimed = ba_resp_scd_ssn;
1367 iwlagn_check_ratid_empty(priv, sta_id, tid);
1370 skb_queue_walk(&reclaimed_skbs, skb) {
1371 struct ieee80211_hdr *hdr = (void *)skb->data;
1372 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1374 if (ieee80211_is_data_qos(hdr->frame_control))
1379 iwl_trans_free_tx_cmd(priv->trans, info->driver_data[1]);
1381 memset(&info->status, 0, sizeof(info->status));
1382 /* Packet was transmitted successfully, failures come as single
1383 * frames because before failing a frame the firmware transmits
1384 * it without aggregation at least once.
1386 info->flags |= IEEE80211_TX_STAT_ACK;
1389 /* this is the first skb we deliver in this batch */
1390 /* put the rate scaling data there */
1391 info = IEEE80211_SKB_CB(skb);
1392 memset(&info->status, 0, sizeof(info->status));
1393 info->flags |= IEEE80211_TX_STAT_AMPDU;
1394 info->status.ampdu_ack_len = ba_resp->txed_2_done;
1395 info->status.ampdu_len = ba_resp->txed;
1396 iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags,
1401 spin_unlock_bh(&priv->sta_lock);
1403 while (!skb_queue_empty(&reclaimed_skbs)) {
1404 skb = __skb_dequeue(&reclaimed_skbs);
1405 ieee80211_tx_status(priv->hw, skb);