1 /******************************************************************************
5 * Copyright(c) 2008 - 2012 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 LICENSE.GPL.
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,
139 rts_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
140 data_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
142 /* Set retry limit on RTS packets */
143 rts_retry_limit = IWLAGN_RTS_DFAULT_RETRY_LIMIT;
145 /* Set retry limit on DATA packets and Probe Responses*/
146 if (ieee80211_is_probe_resp(fc)) {
147 data_retry_limit = IWLAGN_MGMT_DFAULT_RETRY_LIMIT;
149 min(data_retry_limit, rts_retry_limit);
150 } else if (ieee80211_is_back_req(fc))
151 data_retry_limit = IWLAGN_BAR_DFAULT_RETRY_LIMIT;
153 data_retry_limit = IWLAGN_DEFAULT_TX_RETRY;
156 tx_cmd->data_retry_limit = data_retry_limit;
157 tx_cmd->rts_retry_limit = rts_retry_limit;
159 /* DATA packets will use the uCode station table for rate/antenna
161 if (ieee80211_is_data(fc)) {
162 tx_cmd->initial_rate_index = 0;
163 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
164 #ifdef CONFIG_IWLWIFI_DEVICE_TESTMODE
165 if (priv->tm_fixed_rate) {
167 * rate overwrite by testmode
168 * we not only send lq command to change rate
169 * we also re-enforce per data pkt base.
171 tx_cmd->tx_flags &= ~TX_CMD_FLG_STA_RATE_MSK;
172 memcpy(&tx_cmd->rate_n_flags, &priv->tm_fixed_rate,
173 sizeof(tx_cmd->rate_n_flags));
177 } else if (ieee80211_is_back_req(fc))
178 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
181 * If the current TX rate stored in mac80211 has the MCS bit set, it's
182 * not really a TX rate. Thus, we use the lowest supported rate for
183 * this band. Also use the lowest supported rate if the stored rate
186 rate_idx = info->control.rates[0].idx;
187 if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS ||
188 (rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY))
189 rate_idx = rate_lowest_index(
190 &priv->eeprom_data->bands[info->band],
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->eeprom_data->valid_tx_ant));
212 priv->mgmt_tx_ant = iwl_toggle_tx_ant(
213 priv, priv->mgmt_tx_ant,
214 priv->eeprom_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;
234 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
237 case WLAN_CIPHER_SUITE_TKIP:
238 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
239 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
240 IWL_DEBUG_TX(priv, "tx_cmd with tkip hwcrypto\n");
243 case WLAN_CIPHER_SUITE_WEP104:
244 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
246 case WLAN_CIPHER_SUITE_WEP40:
247 tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP |
248 (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
250 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
252 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
253 "with key %d\n", keyconf->keyidx);
257 IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher);
263 * iwl_sta_id_or_broadcast - return sta_id or broadcast sta
264 * @context: the current context
265 * @sta: mac80211 station
267 * In certain circumstances mac80211 passes a station pointer
268 * that may be %NULL, for example during TX or key setup. In
269 * that case, we need to use the broadcast station, so this
270 * inline wraps that pattern.
272 static int iwl_sta_id_or_broadcast(struct iwl_rxon_context *context,
273 struct ieee80211_sta *sta)
278 return context->bcast_sta_id;
280 sta_id = iwl_sta_id(sta);
283 * mac80211 should not be passing a partially
284 * initialised station!
286 WARN_ON(sta_id == IWL_INVALID_STATION);
292 * start REPLY_TX command process
294 int iwlagn_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
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;
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, info->control.sta);
349 if (sta_id == IWL_INVALID_STATION) {
350 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
352 goto drop_unlock_priv;
356 IWL_DEBUG_TX(priv, "station Id %d\n", sta_id);
358 if (info->control.sta)
359 sta_priv = (void *)info->control.sta->drv_priv;
361 if (sta_priv && sta_priv->asleep &&
362 (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)) {
364 * This sends an asynchronous command to the device,
365 * but we can rely on it being processed before the
366 * next frame is processed -- and the next frame to
367 * this station is the one that will consume this
369 * For now set the counter to just 1 since we do not
372 * FIXME: If we get two non-bufferable frames one
373 * after the other, we might only send out one of
374 * them because this is racy.
376 iwl_sta_modify_sleep_tx_count(priv, sta_id, 1);
379 if (info->flags & IEEE80211_TX_CTL_AMPDU)
382 dev_cmd = iwl_trans_alloc_tx_cmd(priv->trans);
384 if (unlikely(!dev_cmd))
385 goto drop_unlock_priv;
387 memset(dev_cmd, 0, sizeof(*dev_cmd));
388 tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload;
390 /* Total # bytes to be transmitted */
392 tx_cmd->len = cpu_to_le16(len);
394 if (info->control.hw_key)
395 iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb);
397 /* TODO need this for burst mode later on */
398 iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id);
400 iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, fc);
402 memset(&info->status, 0, sizeof(info->status));
404 info->driver_data[0] = ctx;
405 info->driver_data[1] = dev_cmd;
406 /* From now on, we cannot access info->control */
408 spin_lock(&priv->sta_lock);
410 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
412 struct iwl_tid_data *tid_data;
413 qc = ieee80211_get_qos_ctl(hdr);
414 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
415 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
416 goto drop_unlock_sta;
417 tid_data = &priv->tid_data[sta_id][tid];
419 /* aggregation is on for this <sta,tid> */
420 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
421 tid_data->agg.state != IWL_AGG_ON) {
422 IWL_ERR(priv, "TX_CTL_AMPDU while not in AGG:"
423 " Tx flags = 0x%08x, agg.state = %d",
424 info->flags, tid_data->agg.state);
425 IWL_ERR(priv, "sta_id = %d, tid = %d seq_num = %d",
426 sta_id, tid, SEQ_TO_SN(tid_data->seq_number));
427 goto drop_unlock_sta;
430 /* We can receive packets from the stack in IWL_AGG_{ON,OFF}
431 * only. Check this here.
433 if (WARN_ONCE(tid_data->agg.state != IWL_AGG_ON &&
434 tid_data->agg.state != IWL_AGG_OFF,
435 "Tx while agg.state = %d", tid_data->agg.state))
436 goto drop_unlock_sta;
438 seq_number = tid_data->seq_number;
439 seq_number &= IEEE80211_SCTL_SEQ;
440 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
441 hdr->seq_ctrl |= cpu_to_le16(seq_number);
445 /* Copy MAC header from skb into command buffer */
446 memcpy(tx_cmd->hdr, hdr, hdr_len);
449 txq_id = priv->tid_data[sta_id][tid].agg.txq_id;
450 else if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
452 * Send this frame after DTIM -- there's a special queue
453 * reserved for this for contexts that support AP mode.
455 txq_id = ctx->mcast_queue;
458 * The microcode will clear the more data
459 * bit in the last frame it transmits.
461 hdr->frame_control |=
462 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
463 } else if (info->flags & IEEE80211_TX_CTL_TX_OFFCHAN)
464 txq_id = IWL_AUX_QUEUE;
466 txq_id = ctx->ac_to_queue[skb_get_queue_mapping(skb)];
468 WARN_ON_ONCE(!is_agg && txq_id != info->hw_queue);
469 WARN_ON_ONCE(is_agg &&
470 priv->queue_to_mac80211[txq_id] != info->hw_queue);
472 if (iwl_trans_tx(priv->trans, skb, dev_cmd, txq_id))
473 goto drop_unlock_sta;
475 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc) &&
476 !ieee80211_has_morefrags(fc))
477 priv->tid_data[sta_id][tid].seq_number = seq_number;
479 spin_unlock(&priv->sta_lock);
482 * Avoid atomic ops if it isn't an associated client.
483 * Also, if this is a packet for aggregation, don't
484 * increase the counter because the ucode will stop
485 * aggregation queues when their respective station
488 if (sta_priv && sta_priv->client && !is_agg)
489 atomic_inc(&sta_priv->pending_frames);
491 if (info->flags & IEEE80211_TX_CTL_TX_OFFCHAN)
492 iwl_scan_offchannel_skb(priv);
498 iwl_trans_free_tx_cmd(priv->trans, dev_cmd);
499 spin_unlock(&priv->sta_lock);
504 static int iwlagn_alloc_agg_txq(struct iwl_priv *priv, int mq)
508 for (q = IWLAGN_FIRST_AMPDU_QUEUE;
509 q < priv->cfg->base_params->num_of_queues; q++) {
510 if (!test_and_set_bit(q, priv->agg_q_alloc)) {
511 priv->queue_to_mac80211[q] = mq;
519 static void iwlagn_dealloc_agg_txq(struct iwl_priv *priv, int q)
521 clear_bit(q, priv->agg_q_alloc);
522 priv->queue_to_mac80211[q] = IWL_INVALID_MAC80211_QUEUE;
525 int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif,
526 struct ieee80211_sta *sta, u16 tid)
528 struct iwl_tid_data *tid_data;
530 enum iwl_agg_state agg_state;
532 sta_id = iwl_sta_id(sta);
534 if (sta_id == IWL_INVALID_STATION) {
535 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
539 spin_lock_bh(&priv->sta_lock);
541 tid_data = &priv->tid_data[sta_id][tid];
542 txq_id = priv->tid_data[sta_id][tid].agg.txq_id;
544 switch (priv->tid_data[sta_id][tid].agg.state) {
545 case IWL_EMPTYING_HW_QUEUE_ADDBA:
547 * This can happen if the peer stops aggregation
548 * again before we've had a chance to drain the
549 * queue we selected previously, i.e. before the
550 * session was really started completely.
552 IWL_DEBUG_HT(priv, "AGG stop before setup done\n");
554 case IWL_AGG_STARTING:
556 * This can happen when the session is stopped before
557 * we receive ADDBA response
559 IWL_DEBUG_HT(priv, "AGG stop before AGG became operational\n");
564 IWL_WARN(priv, "Stopping AGG while state not ON "
565 "or starting for %d on %d (%d)\n", sta_id, tid,
566 priv->tid_data[sta_id][tid].agg.state);
567 spin_unlock_bh(&priv->sta_lock);
571 tid_data->agg.ssn = SEQ_TO_SN(tid_data->seq_number);
573 /* There are still packets for this RA / TID in the HW */
574 if (!test_bit(txq_id, priv->agg_q_alloc)) {
575 IWL_DEBUG_TX_QUEUES(priv,
576 "stopping AGG on STA/TID %d/%d but hwq %d not used\n",
577 sta_id, tid, txq_id);
578 } else if (tid_data->agg.ssn != tid_data->next_reclaimed) {
579 IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, "
582 tid_data->next_reclaimed);
583 priv->tid_data[sta_id][tid].agg.state =
584 IWL_EMPTYING_HW_QUEUE_DELBA;
585 spin_unlock_bh(&priv->sta_lock);
589 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n",
592 agg_state = priv->tid_data[sta_id][tid].agg.state;
593 priv->tid_data[sta_id][tid].agg.state = IWL_AGG_OFF;
595 spin_unlock_bh(&priv->sta_lock);
597 if (test_bit(txq_id, priv->agg_q_alloc)) {
599 * If the transport didn't know that we wanted to start
600 * agreggation, don't tell it that we want to stop them.
601 * This can happen when we don't get the addBA response on
602 * time, or we hadn't time to drain the AC queues.
604 if (agg_state == IWL_AGG_ON)
605 iwl_trans_txq_disable(priv->trans, txq_id);
607 IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n",
609 iwlagn_dealloc_agg_txq(priv, txq_id);
612 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
617 int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
618 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
620 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
621 struct iwl_tid_data *tid_data;
622 int sta_id, txq_id, ret;
624 IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n",
627 sta_id = iwl_sta_id(sta);
628 if (sta_id == IWL_INVALID_STATION) {
629 IWL_ERR(priv, "Start AGG on invalid station\n");
632 if (unlikely(tid >= IWL_MAX_TID_COUNT))
635 if (priv->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) {
636 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
640 txq_id = iwlagn_alloc_agg_txq(priv, ctx->ac_to_queue[tid_to_ac[tid]]);
642 IWL_DEBUG_TX_QUEUES(priv,
643 "No free aggregation queue for %pM/%d\n",
648 ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
652 spin_lock_bh(&priv->sta_lock);
653 tid_data = &priv->tid_data[sta_id][tid];
654 tid_data->agg.ssn = SEQ_TO_SN(tid_data->seq_number);
655 tid_data->agg.txq_id = txq_id;
657 *ssn = tid_data->agg.ssn;
659 if (*ssn == tid_data->next_reclaimed) {
660 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n",
662 tid_data->agg.state = IWL_AGG_STARTING;
663 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
665 IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, "
666 "next_reclaimed = %d\n",
668 tid_data->next_reclaimed);
669 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
671 spin_unlock_bh(&priv->sta_lock);
676 int iwlagn_tx_agg_oper(struct iwl_priv *priv, struct ieee80211_vif *vif,
677 struct ieee80211_sta *sta, u16 tid, u8 buf_size)
679 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
680 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
684 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
686 spin_lock_bh(&priv->sta_lock);
687 ssn = priv->tid_data[sta_priv->sta_id][tid].agg.ssn;
688 q = priv->tid_data[sta_priv->sta_id][tid].agg.txq_id;
689 priv->tid_data[sta_priv->sta_id][tid].agg.state = IWL_AGG_ON;
690 spin_unlock_bh(&priv->sta_lock);
692 fifo = ctx->ac_to_fifo[tid_to_ac[tid]];
694 iwl_trans_txq_enable(priv->trans, q, fifo, sta_priv->sta_id, tid,
698 * If the limit is 0, then it wasn't initialised yet,
699 * use the default. We can do that since we take the
700 * minimum below, and we don't want to go above our
701 * default due to hardware restrictions.
703 if (sta_priv->max_agg_bufsize == 0)
704 sta_priv->max_agg_bufsize =
705 LINK_QUAL_AGG_FRAME_LIMIT_DEF;
708 * Even though in theory the peer could have different
709 * aggregation reorder buffer sizes for different sessions,
710 * our ucode doesn't allow for that and has a global limit
711 * for each station. Therefore, use the minimum of all the
712 * aggregation sessions and our default value.
714 sta_priv->max_agg_bufsize =
715 min(sta_priv->max_agg_bufsize, buf_size);
717 if (priv->hw_params.use_rts_for_aggregation) {
719 * switch to RTS/CTS if it is the prefer protection
720 * method for HT traffic
723 sta_priv->lq_sta.lq.general_params.flags |=
724 LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
726 priv->agg_tids_count++;
727 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
728 priv->agg_tids_count);
730 sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit =
731 sta_priv->max_agg_bufsize;
733 IWL_DEBUG_HT(priv, "Tx aggregation enabled on ra = %pM tid = %d\n",
736 return iwl_send_lq_cmd(priv, ctx,
737 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
740 static void iwlagn_check_ratid_empty(struct iwl_priv *priv, int sta_id, u8 tid)
742 struct iwl_tid_data *tid_data = &priv->tid_data[sta_id][tid];
743 enum iwl_rxon_context_id ctx;
744 struct ieee80211_vif *vif;
747 lockdep_assert_held(&priv->sta_lock);
749 addr = priv->stations[sta_id].sta.sta.addr;
750 ctx = priv->stations[sta_id].ctxid;
751 vif = priv->contexts[ctx].vif;
753 switch (priv->tid_data[sta_id][tid].agg.state) {
754 case IWL_EMPTYING_HW_QUEUE_DELBA:
755 /* There are no packets for this RA / TID in the HW any more */
756 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
757 IWL_DEBUG_TX_QUEUES(priv,
758 "Can continue DELBA flow ssn = next_recl ="
759 " %d", tid_data->next_reclaimed);
760 iwl_trans_txq_disable(priv->trans,
761 tid_data->agg.txq_id);
762 iwlagn_dealloc_agg_txq(priv, tid_data->agg.txq_id);
763 tid_data->agg.state = IWL_AGG_OFF;
764 ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid);
767 case IWL_EMPTYING_HW_QUEUE_ADDBA:
768 /* There are no packets for this RA / TID in the HW any more */
769 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
770 IWL_DEBUG_TX_QUEUES(priv,
771 "Can continue ADDBA flow ssn = next_recl ="
772 " %d", tid_data->next_reclaimed);
773 tid_data->agg.state = IWL_AGG_STARTING;
774 ieee80211_start_tx_ba_cb_irqsafe(vif, addr, tid);
782 static void iwlagn_non_agg_tx_status(struct iwl_priv *priv,
783 struct iwl_rxon_context *ctx,
786 struct ieee80211_sta *sta;
787 struct iwl_station_priv *sta_priv;
790 sta = ieee80211_find_sta(ctx->vif, addr1);
792 sta_priv = (void *)sta->drv_priv;
793 /* avoid atomic ops if this isn't a client */
794 if (sta_priv->client &&
795 atomic_dec_return(&sta_priv->pending_frames) == 0)
796 ieee80211_sta_block_awake(priv->hw, sta, false);
802 * translate ucode response to mac80211 tx status control values
804 static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
805 struct ieee80211_tx_info *info)
807 struct ieee80211_tx_rate *r = &info->status.rates[0];
809 info->status.antenna =
810 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
811 if (rate_n_flags & RATE_MCS_HT_MSK)
812 r->flags |= IEEE80211_TX_RC_MCS;
813 if (rate_n_flags & RATE_MCS_GF_MSK)
814 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
815 if (rate_n_flags & RATE_MCS_HT40_MSK)
816 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
817 if (rate_n_flags & RATE_MCS_DUP_MSK)
818 r->flags |= IEEE80211_TX_RC_DUP_DATA;
819 if (rate_n_flags & RATE_MCS_SGI_MSK)
820 r->flags |= IEEE80211_TX_RC_SHORT_GI;
821 r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band);
824 #ifdef CONFIG_IWLWIFI_DEBUG
825 const char *iwl_get_tx_fail_reason(u32 status)
827 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
828 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
830 switch (status & TX_STATUS_MSK) {
831 case TX_STATUS_SUCCESS:
833 TX_STATUS_POSTPONE(DELAY);
834 TX_STATUS_POSTPONE(FEW_BYTES);
835 TX_STATUS_POSTPONE(BT_PRIO);
836 TX_STATUS_POSTPONE(QUIET_PERIOD);
837 TX_STATUS_POSTPONE(CALC_TTAK);
838 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
839 TX_STATUS_FAIL(SHORT_LIMIT);
840 TX_STATUS_FAIL(LONG_LIMIT);
841 TX_STATUS_FAIL(FIFO_UNDERRUN);
842 TX_STATUS_FAIL(DRAIN_FLOW);
843 TX_STATUS_FAIL(RFKILL_FLUSH);
844 TX_STATUS_FAIL(LIFE_EXPIRE);
845 TX_STATUS_FAIL(DEST_PS);
846 TX_STATUS_FAIL(HOST_ABORTED);
847 TX_STATUS_FAIL(BT_RETRY);
848 TX_STATUS_FAIL(STA_INVALID);
849 TX_STATUS_FAIL(FRAG_DROPPED);
850 TX_STATUS_FAIL(TID_DISABLE);
851 TX_STATUS_FAIL(FIFO_FLUSHED);
852 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
853 TX_STATUS_FAIL(PASSIVE_NO_RX);
854 TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
859 #undef TX_STATUS_FAIL
860 #undef TX_STATUS_POSTPONE
862 #endif /* CONFIG_IWLWIFI_DEBUG */
864 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
866 status &= AGG_TX_STATUS_MSK;
869 case AGG_TX_STATE_UNDERRUN_MSK:
870 priv->reply_agg_tx_stats.underrun++;
872 case AGG_TX_STATE_BT_PRIO_MSK:
873 priv->reply_agg_tx_stats.bt_prio++;
875 case AGG_TX_STATE_FEW_BYTES_MSK:
876 priv->reply_agg_tx_stats.few_bytes++;
878 case AGG_TX_STATE_ABORT_MSK:
879 priv->reply_agg_tx_stats.abort++;
881 case AGG_TX_STATE_LAST_SENT_TTL_MSK:
882 priv->reply_agg_tx_stats.last_sent_ttl++;
884 case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
885 priv->reply_agg_tx_stats.last_sent_try++;
887 case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
888 priv->reply_agg_tx_stats.last_sent_bt_kill++;
890 case AGG_TX_STATE_SCD_QUERY_MSK:
891 priv->reply_agg_tx_stats.scd_query++;
893 case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
894 priv->reply_agg_tx_stats.bad_crc32++;
896 case AGG_TX_STATE_RESPONSE_MSK:
897 priv->reply_agg_tx_stats.response++;
899 case AGG_TX_STATE_DUMP_TX_MSK:
900 priv->reply_agg_tx_stats.dump_tx++;
902 case AGG_TX_STATE_DELAY_TX_MSK:
903 priv->reply_agg_tx_stats.delay_tx++;
906 priv->reply_agg_tx_stats.unknown++;
911 static void iwl_rx_reply_tx_agg(struct iwl_priv *priv,
912 struct iwlagn_tx_resp *tx_resp)
914 struct agg_tx_status *frame_status = &tx_resp->status;
915 int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
916 IWLAGN_TX_RES_TID_POS;
917 int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
918 IWLAGN_TX_RES_RA_POS;
919 struct iwl_ht_agg *agg = &priv->tid_data[sta_id][tid].agg;
920 u32 status = le16_to_cpu(tx_resp->status.status);
923 WARN_ON(tid == IWL_TID_NON_QOS);
925 if (agg->wait_for_ba)
926 IWL_DEBUG_TX_REPLY(priv,
927 "got tx response w/o block-ack\n");
929 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
930 agg->wait_for_ba = (tx_resp->frame_count > 1);
933 * If the BT kill count is non-zero, we'll get this
934 * notification again.
936 if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
937 priv->cfg->bt_params &&
938 priv->cfg->bt_params->advanced_bt_coexist) {
939 IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n");
942 if (tx_resp->frame_count == 1)
945 /* Construct bit-map of pending frames within Tx window */
946 for (i = 0; i < tx_resp->frame_count; i++) {
947 u16 fstatus = le16_to_cpu(frame_status[i].status);
949 if (status & AGG_TX_STATUS_MSK)
950 iwlagn_count_agg_tx_err_status(priv, fstatus);
952 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
953 AGG_TX_STATE_ABORT_MSK))
956 IWL_DEBUG_TX_REPLY(priv, "status %s (0x%08x), "
957 "try-count (0x%08x)\n",
958 iwl_get_agg_tx_fail_reason(fstatus),
959 fstatus & AGG_TX_STATUS_MSK,
960 fstatus & AGG_TX_TRY_MSK);
964 #ifdef CONFIG_IWLWIFI_DEBUG
965 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
967 const char *iwl_get_agg_tx_fail_reason(u16 status)
969 status &= AGG_TX_STATUS_MSK;
971 case AGG_TX_STATE_TRANSMITTED:
973 AGG_TX_STATE_FAIL(UNDERRUN_MSK);
974 AGG_TX_STATE_FAIL(BT_PRIO_MSK);
975 AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
976 AGG_TX_STATE_FAIL(ABORT_MSK);
977 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
978 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
979 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
980 AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
981 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
982 AGG_TX_STATE_FAIL(RESPONSE_MSK);
983 AGG_TX_STATE_FAIL(DUMP_TX_MSK);
984 AGG_TX_STATE_FAIL(DELAY_TX_MSK);
989 #endif /* CONFIG_IWLWIFI_DEBUG */
991 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
993 return le32_to_cpup((__le32 *)&tx_resp->status +
994 tx_resp->frame_count) & MAX_SN;
997 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
999 status &= TX_STATUS_MSK;
1002 case TX_STATUS_POSTPONE_DELAY:
1003 priv->reply_tx_stats.pp_delay++;
1005 case TX_STATUS_POSTPONE_FEW_BYTES:
1006 priv->reply_tx_stats.pp_few_bytes++;
1008 case TX_STATUS_POSTPONE_BT_PRIO:
1009 priv->reply_tx_stats.pp_bt_prio++;
1011 case TX_STATUS_POSTPONE_QUIET_PERIOD:
1012 priv->reply_tx_stats.pp_quiet_period++;
1014 case TX_STATUS_POSTPONE_CALC_TTAK:
1015 priv->reply_tx_stats.pp_calc_ttak++;
1017 case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
1018 priv->reply_tx_stats.int_crossed_retry++;
1020 case TX_STATUS_FAIL_SHORT_LIMIT:
1021 priv->reply_tx_stats.short_limit++;
1023 case TX_STATUS_FAIL_LONG_LIMIT:
1024 priv->reply_tx_stats.long_limit++;
1026 case TX_STATUS_FAIL_FIFO_UNDERRUN:
1027 priv->reply_tx_stats.fifo_underrun++;
1029 case TX_STATUS_FAIL_DRAIN_FLOW:
1030 priv->reply_tx_stats.drain_flow++;
1032 case TX_STATUS_FAIL_RFKILL_FLUSH:
1033 priv->reply_tx_stats.rfkill_flush++;
1035 case TX_STATUS_FAIL_LIFE_EXPIRE:
1036 priv->reply_tx_stats.life_expire++;
1038 case TX_STATUS_FAIL_DEST_PS:
1039 priv->reply_tx_stats.dest_ps++;
1041 case TX_STATUS_FAIL_HOST_ABORTED:
1042 priv->reply_tx_stats.host_abort++;
1044 case TX_STATUS_FAIL_BT_RETRY:
1045 priv->reply_tx_stats.bt_retry++;
1047 case TX_STATUS_FAIL_STA_INVALID:
1048 priv->reply_tx_stats.sta_invalid++;
1050 case TX_STATUS_FAIL_FRAG_DROPPED:
1051 priv->reply_tx_stats.frag_drop++;
1053 case TX_STATUS_FAIL_TID_DISABLE:
1054 priv->reply_tx_stats.tid_disable++;
1056 case TX_STATUS_FAIL_FIFO_FLUSHED:
1057 priv->reply_tx_stats.fifo_flush++;
1059 case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
1060 priv->reply_tx_stats.insuff_cf_poll++;
1062 case TX_STATUS_FAIL_PASSIVE_NO_RX:
1063 priv->reply_tx_stats.fail_hw_drop++;
1065 case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
1066 priv->reply_tx_stats.sta_color_mismatch++;
1069 priv->reply_tx_stats.unknown++;
1074 static void iwlagn_set_tx_status(struct iwl_priv *priv,
1075 struct ieee80211_tx_info *info,
1076 struct iwlagn_tx_resp *tx_resp,
1079 u16 status = le16_to_cpu(tx_resp->status.status);
1081 info->status.rates[0].count = tx_resp->failure_frame + 1;
1083 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1084 info->flags |= iwl_tx_status_to_mac80211(status);
1085 iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
1087 if (!iwl_is_tx_success(status))
1088 iwlagn_count_tx_err_status(priv, status);
1091 static void iwl_check_abort_status(struct iwl_priv *priv,
1092 u8 frame_count, u32 status)
1094 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
1095 IWL_ERR(priv, "Tx flush command to flush out all frames\n");
1096 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
1097 queue_work(priv->workqueue, &priv->tx_flush);
1101 static int iwl_reclaim(struct iwl_priv *priv, int sta_id, int tid,
1102 int txq_id, int ssn, struct sk_buff_head *skbs)
1104 if (unlikely(txq_id >= IWLAGN_FIRST_AMPDU_QUEUE &&
1105 tid != IWL_TID_NON_QOS &&
1106 txq_id != priv->tid_data[sta_id][tid].agg.txq_id)) {
1108 * FIXME: this is a uCode bug which need to be addressed,
1109 * log the information and return for now.
1110 * Since it is can possibly happen very often and in order
1111 * not to fill the syslog, don't use IWL_ERR or IWL_WARN
1113 IWL_DEBUG_TX_QUEUES(priv,
1114 "Bad queue mapping txq_id=%d, agg_txq[sta:%d,tid:%d]=%d\n",
1115 txq_id, sta_id, tid,
1116 priv->tid_data[sta_id][tid].agg.txq_id);
1120 iwl_trans_reclaim(priv->trans, txq_id, ssn, skbs);
1124 int iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb,
1125 struct iwl_device_cmd *cmd)
1127 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1128 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1129 int txq_id = SEQ_TO_QUEUE(sequence);
1130 int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence);
1131 struct iwlagn_tx_resp *tx_resp = (void *)pkt->data;
1132 struct ieee80211_hdr *hdr;
1133 u32 status = le16_to_cpu(tx_resp->status.status);
1134 u16 ssn = iwlagn_get_scd_ssn(tx_resp);
1138 struct ieee80211_tx_info *info;
1139 struct sk_buff_head skbs;
1140 struct sk_buff *skb;
1141 struct iwl_rxon_context *ctx;
1142 bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE);
1143 bool is_offchannel_skb;
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(&priv->sta_lock);
1153 iwl_rx_reply_tx_agg(priv, tx_resp);
1155 __skb_queue_head_init(&skbs);
1157 is_offchannel_skb = false;
1159 if (tx_resp->frame_count == 1) {
1160 u16 next_reclaimed = le16_to_cpu(tx_resp->seq_ctl);
1161 next_reclaimed = SEQ_TO_SN(next_reclaimed + 0x10);
1164 /* If this is an aggregation queue, we can rely on the
1165 * ssn since the wifi sequence number corresponds to
1166 * the index in the TFD ring (%256).
1167 * The seq_ctl is the sequence control of the packet
1168 * to which this Tx response relates. But if there is a
1169 * hole in the bitmap of the BA we received, this Tx
1170 * response may allow to reclaim the hole and all the
1171 * subsequent packets that were already acked.
1172 * In that case, seq_ctl != ssn, and the next packet
1173 * to be reclaimed will be ssn and not seq_ctl.
1175 next_reclaimed = ssn;
1178 if (tid != IWL_TID_NON_QOS) {
1179 priv->tid_data[sta_id][tid].next_reclaimed =
1181 IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d\n",
1185 /*we can free until ssn % q.n_bd not inclusive */
1186 WARN_ON_ONCE(iwl_reclaim(priv, sta_id, tid,
1187 txq_id, ssn, &skbs));
1188 iwlagn_check_ratid_empty(priv, sta_id, tid);
1191 /* process frames */
1192 skb_queue_walk(&skbs, skb) {
1193 hdr = (struct ieee80211_hdr *)skb->data;
1195 if (!ieee80211_is_data_qos(hdr->frame_control))
1196 priv->last_seq_ctl = tx_resp->seq_ctl;
1198 info = IEEE80211_SKB_CB(skb);
1199 ctx = info->driver_data[0];
1200 iwl_trans_free_tx_cmd(priv->trans,
1201 info->driver_data[1]);
1203 memset(&info->status, 0, sizeof(info->status));
1205 if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
1206 iwl_is_associated_ctx(ctx) && ctx->vif &&
1207 ctx->vif->type == NL80211_IFTYPE_STATION) {
1208 /* block and stop all queues */
1209 priv->passive_no_rx = true;
1210 IWL_DEBUG_TX_QUEUES(priv, "stop all queues: "
1212 ieee80211_stop_queues(priv->hw);
1214 IWL_DEBUG_TX_REPLY(priv,
1215 "TXQ %d status %s (0x%08x) "
1216 "rate_n_flags 0x%x retries %d\n",
1218 iwl_get_tx_fail_reason(status),
1220 le32_to_cpu(tx_resp->rate_n_flags),
1221 tx_resp->failure_frame);
1223 IWL_DEBUG_TX_REPLY(priv,
1224 "FrameCnt = %d, idx=%d\n",
1225 tx_resp->frame_count, cmd_index);
1228 /* check if BAR is needed */
1229 if (is_agg && !iwl_is_tx_success(status))
1230 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1231 iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb),
1234 iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1);
1237 (info->flags & IEEE80211_TX_CTL_TX_OFFCHAN);
1241 WARN_ON(!is_agg && freed != 1);
1244 * An offchannel frame can be send only on the AUX queue, where
1245 * there is no aggregation (and reordering) so it only is single
1246 * skb is expected to be processed.
1248 WARN_ON(is_offchannel_skb && freed != 1);
1251 iwl_check_abort_status(priv, tx_resp->frame_count, status);
1252 spin_unlock(&priv->sta_lock);
1254 while (!skb_queue_empty(&skbs)) {
1255 skb = __skb_dequeue(&skbs);
1256 ieee80211_tx_status(priv->hw, skb);
1259 if (is_offchannel_skb)
1260 iwl_scan_offchannel_skb_status(priv);
1266 * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
1268 * Handles block-acknowledge notification from device, which reports success
1269 * of frames sent via aggregation.
1271 int iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
1272 struct iwl_rx_cmd_buffer *rxb,
1273 struct iwl_device_cmd *cmd)
1275 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1276 struct iwl_compressed_ba_resp *ba_resp = (void *)pkt->data;
1277 struct iwl_ht_agg *agg;
1278 struct sk_buff_head reclaimed_skbs;
1279 struct ieee80211_tx_info *info;
1280 struct ieee80211_hdr *hdr;
1281 struct sk_buff *skb;
1286 /* "flow" corresponds to Tx queue */
1287 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
1289 /* "ssn" is start of block-ack Tx window, corresponds to index
1290 * (in Tx queue's circular buffer) of first TFD/frame in window */
1291 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
1293 if (scd_flow >= priv->cfg->base_params->num_of_queues) {
1295 "BUG_ON scd_flow is bigger than number of queues\n");
1299 sta_id = ba_resp->sta_id;
1301 agg = &priv->tid_data[sta_id][tid].agg;
1303 spin_lock(&priv->sta_lock);
1305 if (unlikely(!agg->wait_for_ba)) {
1306 if (unlikely(ba_resp->bitmap))
1307 IWL_ERR(priv, "Received BA when not expected\n");
1308 spin_unlock(&priv->sta_lock);
1312 __skb_queue_head_init(&reclaimed_skbs);
1314 /* Release all TFDs before the SSN, i.e. all TFDs in front of
1315 * block-ack window (we assume that they've been successfully
1316 * transmitted ... if not, it's too late anyway). */
1317 if (iwl_reclaim(priv, sta_id, tid, scd_flow,
1318 ba_resp_scd_ssn, &reclaimed_skbs)) {
1319 spin_unlock(&priv->sta_lock);
1323 IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
1326 (u8 *) &ba_resp->sta_addr_lo32,
1328 IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, "
1329 "scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1330 ba_resp->tid, le16_to_cpu(ba_resp->seq_ctl),
1331 (unsigned long long)le64_to_cpu(ba_resp->bitmap),
1332 scd_flow, ba_resp_scd_ssn, ba_resp->txed,
1333 ba_resp->txed_2_done);
1335 /* Mark that the expected block-ack response arrived */
1336 agg->wait_for_ba = false;
1338 /* Sanity check values reported by uCode */
1339 if (ba_resp->txed_2_done > ba_resp->txed) {
1340 IWL_DEBUG_TX_REPLY(priv,
1341 "bogus sent(%d) and ack(%d) count\n",
1342 ba_resp->txed, ba_resp->txed_2_done);
1344 * set txed_2_done = txed,
1345 * so it won't impact rate scale
1347 ba_resp->txed = ba_resp->txed_2_done;
1350 priv->tid_data[sta_id][tid].next_reclaimed = ba_resp_scd_ssn;
1352 iwlagn_check_ratid_empty(priv, sta_id, tid);
1355 skb_queue_walk(&reclaimed_skbs, skb) {
1356 hdr = (struct ieee80211_hdr *)skb->data;
1358 if (ieee80211_is_data_qos(hdr->frame_control))
1363 info = IEEE80211_SKB_CB(skb);
1364 iwl_trans_free_tx_cmd(priv->trans, info->driver_data[1]);
1367 /* this is the first skb we deliver in this batch */
1368 /* put the rate scaling data there */
1369 info = IEEE80211_SKB_CB(skb);
1370 memset(&info->status, 0, sizeof(info->status));
1371 info->flags |= IEEE80211_TX_STAT_ACK;
1372 info->flags |= IEEE80211_TX_STAT_AMPDU;
1373 info->status.ampdu_ack_len = ba_resp->txed_2_done;
1374 info->status.ampdu_len = ba_resp->txed;
1375 iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags,
1380 spin_unlock(&priv->sta_lock);
1382 while (!skb_queue_empty(&reclaimed_skbs)) {
1383 skb = __skb_dequeue(&reclaimed_skbs);
1384 ieee80211_tx_status(priv->hw, skb);