1 /******************************************************************************
5 * Copyright(c) 2008 - 2011 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>
40 #include "iwl-helpers.h"
41 #include "iwl-agn-hw.h"
43 #include "iwl-trans.h"
45 static inline int get_ac_from_tid(u16 tid)
47 if (likely(tid < ARRAY_SIZE(tid_to_ac)))
48 return tid_to_ac[tid];
50 /* no support for TIDs 8-15 yet */
54 static int iwlagn_txq_agg_enable(struct iwl_priv *priv, int txq_id, int sta_id,
57 if ((IWLAGN_FIRST_AMPDU_QUEUE > txq_id) ||
58 (IWLAGN_FIRST_AMPDU_QUEUE +
59 hw_params(priv).num_ampdu_queues <= txq_id)) {
61 "queue number out of range: %d, must be %d to %d\n",
62 txq_id, IWLAGN_FIRST_AMPDU_QUEUE,
63 IWLAGN_FIRST_AMPDU_QUEUE +
64 hw_params(priv).num_ampdu_queues - 1);
68 /* Modify device's station table to Tx this TID */
69 return iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
72 static void iwlagn_tx_cmd_protection(struct iwl_priv *priv,
73 struct ieee80211_tx_info *info,
74 __le16 fc, __le32 *tx_flags)
76 if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS ||
77 info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT ||
78 info->flags & IEEE80211_TX_CTL_AMPDU)
79 *tx_flags |= TX_CMD_FLG_PROT_REQUIRE_MSK;
83 * handle build REPLY_TX command notification.
85 static void iwlagn_tx_cmd_build_basic(struct iwl_priv *priv,
87 struct iwl_tx_cmd *tx_cmd,
88 struct ieee80211_tx_info *info,
89 struct ieee80211_hdr *hdr, u8 sta_id)
91 __le16 fc = hdr->frame_control;
92 __le32 tx_flags = tx_cmd->tx_flags;
94 tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
96 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
97 tx_flags |= TX_CMD_FLG_ACK_MSK;
99 tx_flags &= ~TX_CMD_FLG_ACK_MSK;
101 if (ieee80211_is_probe_resp(fc))
102 tx_flags |= TX_CMD_FLG_TSF_MSK;
103 else if (ieee80211_is_back_req(fc))
104 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
105 else if (info->band == IEEE80211_BAND_2GHZ &&
106 priv->cfg->bt_params &&
107 priv->cfg->bt_params->advanced_bt_coexist &&
108 (ieee80211_is_auth(fc) || ieee80211_is_assoc_req(fc) ||
109 ieee80211_is_reassoc_req(fc) ||
110 skb->protocol == cpu_to_be16(ETH_P_PAE)))
111 tx_flags |= TX_CMD_FLG_IGNORE_BT;
114 tx_cmd->sta_id = sta_id;
115 if (ieee80211_has_morefrags(fc))
116 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
118 if (ieee80211_is_data_qos(fc)) {
119 u8 *qc = ieee80211_get_qos_ctl(hdr);
120 tx_cmd->tid_tspec = qc[0] & 0xf;
121 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
123 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
126 iwlagn_tx_cmd_protection(priv, info, fc, &tx_flags);
128 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
129 if (ieee80211_is_mgmt(fc)) {
130 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
131 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
133 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
135 tx_cmd->timeout.pm_frame_timeout = 0;
138 tx_cmd->driver_txop = 0;
139 tx_cmd->tx_flags = tx_flags;
140 tx_cmd->next_frame_len = 0;
143 #define RTS_DFAULT_RETRY_LIMIT 60
145 static void iwlagn_tx_cmd_build_rate(struct iwl_priv *priv,
146 struct iwl_tx_cmd *tx_cmd,
147 struct ieee80211_tx_info *info,
156 /* Set retry limit on DATA packets and Probe Responses*/
157 if (ieee80211_is_probe_resp(fc))
158 data_retry_limit = 3;
160 data_retry_limit = IWLAGN_DEFAULT_TX_RETRY;
161 tx_cmd->data_retry_limit = data_retry_limit;
163 /* Set retry limit on RTS packets */
164 rts_retry_limit = RTS_DFAULT_RETRY_LIMIT;
165 if (data_retry_limit < rts_retry_limit)
166 rts_retry_limit = data_retry_limit;
167 tx_cmd->rts_retry_limit = rts_retry_limit;
169 /* DATA packets will use the uCode station table for rate/antenna
171 if (ieee80211_is_data(fc)) {
172 tx_cmd->initial_rate_index = 0;
173 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
174 #ifdef CONFIG_IWLWIFI_DEVICE_SVTOOL
175 if (priv->tm_fixed_rate) {
177 * rate overwrite by testmode
178 * we not only send lq command to change rate
179 * we also re-enforce per data pkt base.
181 tx_cmd->tx_flags &= ~TX_CMD_FLG_STA_RATE_MSK;
182 memcpy(&tx_cmd->rate_n_flags, &priv->tm_fixed_rate,
183 sizeof(tx_cmd->rate_n_flags));
190 * If the current TX rate stored in mac80211 has the MCS bit set, it's
191 * not really a TX rate. Thus, we use the lowest supported rate for
192 * this band. Also use the lowest supported rate if the stored rate
195 rate_idx = info->control.rates[0].idx;
196 if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS ||
197 (rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY))
198 rate_idx = rate_lowest_index(&priv->bands[info->band],
200 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
201 if (info->band == IEEE80211_BAND_5GHZ)
202 rate_idx += IWL_FIRST_OFDM_RATE;
203 /* Get PLCP rate for tx_cmd->rate_n_flags */
204 rate_plcp = iwl_rates[rate_idx].plcp;
205 /* Zero out flags for this packet */
208 /* Set CCK flag as needed */
209 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
210 rate_flags |= RATE_MCS_CCK_MSK;
212 /* Set up antennas */
213 if (priv->cfg->bt_params &&
214 priv->cfg->bt_params->advanced_bt_coexist &&
215 priv->bt_full_concurrent) {
216 /* operated as 1x1 in full concurrency mode */
217 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
218 first_antenna(hw_params(priv).valid_tx_ant));
220 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
221 hw_params(priv).valid_tx_ant);
222 rate_flags |= iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
224 /* Set the rate in the TX cmd */
225 tx_cmd->rate_n_flags = iwl_hw_set_rate_n_flags(rate_plcp, rate_flags);
228 static void iwlagn_tx_cmd_build_hwcrypto(struct iwl_priv *priv,
229 struct ieee80211_tx_info *info,
230 struct iwl_tx_cmd *tx_cmd,
231 struct sk_buff *skb_frag,
234 struct ieee80211_key_conf *keyconf = info->control.hw_key;
236 switch (keyconf->cipher) {
237 case WLAN_CIPHER_SUITE_CCMP:
238 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
239 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
240 if (info->flags & IEEE80211_TX_CTL_AMPDU)
241 tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
242 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
245 case WLAN_CIPHER_SUITE_TKIP:
246 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
247 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
248 IWL_DEBUG_TX(priv, "tx_cmd with tkip hwcrypto\n");
251 case WLAN_CIPHER_SUITE_WEP104:
252 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
254 case WLAN_CIPHER_SUITE_WEP40:
255 tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP |
256 (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
258 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
260 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
261 "with key %d\n", keyconf->keyidx);
265 IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher);
271 * start REPLY_TX command process
273 int iwlagn_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
275 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
276 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
277 struct iwl_station_priv *sta_priv = NULL;
278 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
279 struct iwl_tx_cmd *tx_cmd;
291 if (info->control.vif)
292 ctx = iwl_rxon_ctx_from_vif(info->control.vif);
294 spin_lock_irqsave(&priv->shrd->lock, flags);
295 if (iwl_is_rfkill(priv->shrd)) {
296 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
297 goto drop_unlock_priv;
300 fc = hdr->frame_control;
302 #ifdef CONFIG_IWLWIFI_DEBUG
303 if (ieee80211_is_auth(fc))
304 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
305 else if (ieee80211_is_assoc_req(fc))
306 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
307 else if (ieee80211_is_reassoc_req(fc))
308 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
311 hdr_len = ieee80211_hdrlen(fc);
313 /* For management frames use broadcast id to do not break aggregation */
314 if (!ieee80211_is_data(fc))
315 sta_id = ctx->bcast_sta_id;
317 /* Find index into station table for destination station */
318 sta_id = iwl_sta_id_or_broadcast(priv, ctx, info->control.sta);
319 if (sta_id == IWL_INVALID_STATION) {
320 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
322 goto drop_unlock_priv;
326 IWL_DEBUG_TX(priv, "station Id %d\n", sta_id);
328 if (info->control.sta)
329 sta_priv = (void *)info->control.sta->drv_priv;
331 if (sta_priv && sta_priv->asleep &&
332 (info->flags & IEEE80211_TX_CTL_PSPOLL_RESPONSE)) {
334 * This sends an asynchronous command to the device,
335 * but we can rely on it being processed before the
336 * next frame is processed -- and the next frame to
337 * this station is the one that will consume this
339 * For now set the counter to just 1 since we do not
342 iwl_sta_modify_sleep_tx_count(priv, sta_id, 1);
346 * Send this frame after DTIM -- there's a special queue
347 * reserved for this for contexts that support AP mode.
349 if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
350 txq_id = ctx->mcast_queue;
352 * The microcode will clear the more data
353 * bit in the last frame it transmits.
355 hdr->frame_control |=
356 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
357 } else if (info->flags & IEEE80211_TX_CTL_TX_OFFCHAN)
358 txq_id = IWL_AUX_QUEUE;
360 txq_id = ctx->ac_to_queue[skb_get_queue_mapping(skb)];
362 /* irqs already disabled/saved above when locking priv->shrd->lock */
363 spin_lock(&priv->shrd->sta_lock);
365 if (ieee80211_is_data_qos(fc)) {
367 struct iwl_tid_data *tid_data;
368 qc = ieee80211_get_qos_ctl(hdr);
369 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
370 tid_data = &priv->shrd->tid_data[sta_id][tid];
372 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
373 goto drop_unlock_sta;
375 seq_number = tid_data->seq_number;
376 seq_number &= IEEE80211_SCTL_SEQ;
377 hdr->seq_ctrl = hdr->seq_ctrl &
378 cpu_to_le16(IEEE80211_SCTL_FRAG);
379 hdr->seq_ctrl |= cpu_to_le16(seq_number);
381 /* aggregation is on for this <sta,tid> */
382 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
383 tid_data->agg.state == IWL_AGG_ON) {
384 txq_id = tid_data->agg.txq_id;
389 tx_cmd = iwl_trans_get_tx_cmd(trans(priv), txq_id);
390 if (unlikely(!tx_cmd))
391 goto drop_unlock_sta;
393 /* Copy MAC header from skb into command buffer */
394 memcpy(tx_cmd->hdr, hdr, hdr_len);
396 /* Total # bytes to be transmitted */
398 tx_cmd->len = cpu_to_le16(len);
400 if (info->control.hw_key)
401 iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb, sta_id);
403 /* TODO need this for burst mode later on */
404 iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id);
405 iwl_dbg_log_tx_data_frame(priv, len, hdr);
407 iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, fc);
409 iwl_update_stats(priv, true, fc, len);
411 info->driver_data[0] = ctx;
413 if (iwl_trans_tx(trans(priv), skb, tx_cmd, txq_id, fc, is_agg))
414 goto drop_unlock_sta;
416 if (ieee80211_is_data_qos(fc)) {
417 priv->shrd->tid_data[sta_id][tid].tfds_in_queue++;
418 if (!ieee80211_has_morefrags(fc))
419 priv->shrd->tid_data[sta_id][tid].seq_number =
423 spin_unlock(&priv->shrd->sta_lock);
424 spin_unlock_irqrestore(&priv->shrd->lock, flags);
427 * Avoid atomic ops if it isn't an associated client.
428 * Also, if this is a packet for aggregation, don't
429 * increase the counter because the ucode will stop
430 * aggregation queues when their respective station
433 if (sta_priv && sta_priv->client && !is_agg)
434 atomic_inc(&sta_priv->pending_frames);
439 spin_unlock(&priv->shrd->sta_lock);
441 spin_unlock_irqrestore(&priv->shrd->lock, flags);
446 * Find first available (lowest unused) Tx Queue, mark it "active".
447 * Called only when finding queue for aggregation.
448 * Should never return anything < 7, because they should already
449 * be in use as EDCA AC (0-3), Command (4), reserved (5, 6)
451 static int iwlagn_txq_ctx_activate_free(struct iwl_priv *priv)
455 for (txq_id = 0; txq_id < hw_params(priv).max_txq_num; txq_id++)
456 if (!test_and_set_bit(txq_id, &priv->txq_ctx_active_msk))
461 int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
462 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
468 struct iwl_tid_data *tid_data;
470 IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n",
473 sta_id = iwl_sta_id(sta);
474 if (sta_id == IWL_INVALID_STATION) {
475 IWL_ERR(priv, "Start AGG on invalid station\n");
478 if (unlikely(tid >= IWL_MAX_TID_COUNT))
481 if (priv->shrd->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) {
482 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
486 txq_id = iwlagn_txq_ctx_activate_free(priv);
488 IWL_ERR(priv, "No free aggregation queue available\n");
492 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
493 tid_data = &priv->shrd->tid_data[sta_id][tid];
494 *ssn = SEQ_TO_SN(tid_data->seq_number);
495 tid_data->agg.txq_id = txq_id;
496 iwl_set_swq_id(&priv->txq[txq_id], get_ac_from_tid(tid), txq_id);
497 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
499 ret = iwlagn_txq_agg_enable(priv, txq_id, sta_id, tid);
503 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
504 tid_data = &priv->shrd->tid_data[sta_id][tid];
505 if (tid_data->tfds_in_queue == 0) {
506 IWL_DEBUG_HT(priv, "HW queue is empty\n");
507 tid_data->agg.state = IWL_AGG_ON;
508 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
510 IWL_DEBUG_HT(priv, "HW queue is NOT empty: %d packets in HW queue\n",
511 tid_data->tfds_in_queue);
512 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
514 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
518 int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif,
519 struct ieee80211_sta *sta, u16 tid)
521 int txq_id, sta_id, ssn;
522 struct iwl_tid_data *tid_data;
523 int write_ptr, read_ptr;
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_irqsave(&priv->shrd->sta_lock, flags);
535 tid_data = &priv->shrd->tid_data[sta_id][tid];
536 ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4;
537 txq_id = tid_data->agg.txq_id;
539 switch (priv->shrd->tid_data[sta_id][tid].agg.state) {
540 case IWL_EMPTYING_HW_QUEUE_ADDBA:
542 * This can happen if the peer stops aggregation
543 * again before we've had a chance to drain the
544 * queue we selected previously, i.e. before the
545 * session was really started completely.
547 IWL_DEBUG_HT(priv, "AGG stop before setup done\n");
552 IWL_WARN(priv, "Stopping AGG while state not ON or starting\n");
555 write_ptr = priv->txq[txq_id].q.write_ptr;
556 read_ptr = priv->txq[txq_id].q.read_ptr;
558 /* The queue is not empty */
559 if (write_ptr != read_ptr) {
560 IWL_DEBUG_HT(priv, "Stopping a non empty AGG HW QUEUE\n");
561 priv->shrd->tid_data[sta_id][tid].agg.state =
562 IWL_EMPTYING_HW_QUEUE_DELBA;
563 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
567 IWL_DEBUG_HT(priv, "HW queue is empty\n");
569 priv->shrd->tid_data[sta_id][tid].agg.state = IWL_AGG_OFF;
571 /* do not restore/save irqs */
572 spin_unlock(&priv->shrd->sta_lock);
573 spin_lock(&priv->shrd->lock);
576 * the only reason this call can fail is queue number out of range,
577 * which can happen if uCode is reloaded and all the station
578 * information are lost. if it is outside the range, there is no need
579 * to deactivate the uCode queue, just return "success" to allow
580 * mac80211 to clean up it own data.
582 iwl_trans_txq_agg_disable(trans(priv), txq_id);
583 spin_unlock_irqrestore(&priv->shrd->lock, flags);
585 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
590 static int iwlagn_txq_check_empty(struct iwl_priv *priv,
591 int sta_id, u8 tid, int txq_id)
593 struct iwl_queue *q = &priv->txq[txq_id].q;
594 u8 *addr = priv->stations[sta_id].sta.sta.addr;
595 struct iwl_tid_data *tid_data = &priv->shrd->tid_data[sta_id][tid];
596 struct iwl_rxon_context *ctx;
598 ctx = &priv->contexts[priv->stations[sta_id].ctxid];
600 lockdep_assert_held(&priv->shrd->sta_lock);
602 switch (priv->shrd->tid_data[sta_id][tid].agg.state) {
603 case IWL_EMPTYING_HW_QUEUE_DELBA:
604 /* We are reclaiming the last packet of the */
605 /* aggregated HW queue */
606 if ((txq_id == tid_data->agg.txq_id) &&
607 (q->read_ptr == q->write_ptr)) {
608 IWL_DEBUG_HT(priv, "HW queue empty: continue DELBA flow\n");
609 iwl_trans_txq_agg_disable(trans(priv), txq_id);
610 tid_data->agg.state = IWL_AGG_OFF;
611 ieee80211_stop_tx_ba_cb_irqsafe(ctx->vif, addr, tid);
614 case IWL_EMPTYING_HW_QUEUE_ADDBA:
615 /* We are reclaiming the last packet of the queue */
616 if (tid_data->tfds_in_queue == 0) {
617 IWL_DEBUG_HT(priv, "HW queue empty: continue ADDBA flow\n");
618 tid_data->agg.state = IWL_AGG_ON;
619 ieee80211_start_tx_ba_cb_irqsafe(ctx->vif, addr, tid);
627 static void iwlagn_non_agg_tx_status(struct iwl_priv *priv,
628 struct iwl_rxon_context *ctx,
631 struct ieee80211_sta *sta;
632 struct iwl_station_priv *sta_priv;
635 sta = ieee80211_find_sta(ctx->vif, addr1);
637 sta_priv = (void *)sta->drv_priv;
638 /* avoid atomic ops if this isn't a client */
639 if (sta_priv->client &&
640 atomic_dec_return(&sta_priv->pending_frames) == 0)
641 ieee80211_sta_block_awake(priv->hw, sta, false);
647 * translate ucode response to mac80211 tx status control values
649 static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
650 struct ieee80211_tx_info *info)
652 struct ieee80211_tx_rate *r = &info->control.rates[0];
654 info->antenna_sel_tx =
655 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
656 if (rate_n_flags & RATE_MCS_HT_MSK)
657 r->flags |= IEEE80211_TX_RC_MCS;
658 if (rate_n_flags & RATE_MCS_GF_MSK)
659 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
660 if (rate_n_flags & RATE_MCS_HT40_MSK)
661 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
662 if (rate_n_flags & RATE_MCS_DUP_MSK)
663 r->flags |= IEEE80211_TX_RC_DUP_DATA;
664 if (rate_n_flags & RATE_MCS_SGI_MSK)
665 r->flags |= IEEE80211_TX_RC_SHORT_GI;
666 r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band);
669 #ifdef CONFIG_IWLWIFI_DEBUG
670 const char *iwl_get_tx_fail_reason(u32 status)
672 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
673 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
675 switch (status & TX_STATUS_MSK) {
676 case TX_STATUS_SUCCESS:
678 TX_STATUS_POSTPONE(DELAY);
679 TX_STATUS_POSTPONE(FEW_BYTES);
680 TX_STATUS_POSTPONE(BT_PRIO);
681 TX_STATUS_POSTPONE(QUIET_PERIOD);
682 TX_STATUS_POSTPONE(CALC_TTAK);
683 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
684 TX_STATUS_FAIL(SHORT_LIMIT);
685 TX_STATUS_FAIL(LONG_LIMIT);
686 TX_STATUS_FAIL(FIFO_UNDERRUN);
687 TX_STATUS_FAIL(DRAIN_FLOW);
688 TX_STATUS_FAIL(RFKILL_FLUSH);
689 TX_STATUS_FAIL(LIFE_EXPIRE);
690 TX_STATUS_FAIL(DEST_PS);
691 TX_STATUS_FAIL(HOST_ABORTED);
692 TX_STATUS_FAIL(BT_RETRY);
693 TX_STATUS_FAIL(STA_INVALID);
694 TX_STATUS_FAIL(FRAG_DROPPED);
695 TX_STATUS_FAIL(TID_DISABLE);
696 TX_STATUS_FAIL(FIFO_FLUSHED);
697 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
698 TX_STATUS_FAIL(PASSIVE_NO_RX);
699 TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
704 #undef TX_STATUS_FAIL
705 #undef TX_STATUS_POSTPONE
707 #endif /* CONFIG_IWLWIFI_DEBUG */
709 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
711 status &= AGG_TX_STATUS_MSK;
714 case AGG_TX_STATE_UNDERRUN_MSK:
715 priv->reply_agg_tx_stats.underrun++;
717 case AGG_TX_STATE_BT_PRIO_MSK:
718 priv->reply_agg_tx_stats.bt_prio++;
720 case AGG_TX_STATE_FEW_BYTES_MSK:
721 priv->reply_agg_tx_stats.few_bytes++;
723 case AGG_TX_STATE_ABORT_MSK:
724 priv->reply_agg_tx_stats.abort++;
726 case AGG_TX_STATE_LAST_SENT_TTL_MSK:
727 priv->reply_agg_tx_stats.last_sent_ttl++;
729 case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
730 priv->reply_agg_tx_stats.last_sent_try++;
732 case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
733 priv->reply_agg_tx_stats.last_sent_bt_kill++;
735 case AGG_TX_STATE_SCD_QUERY_MSK:
736 priv->reply_agg_tx_stats.scd_query++;
738 case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
739 priv->reply_agg_tx_stats.bad_crc32++;
741 case AGG_TX_STATE_RESPONSE_MSK:
742 priv->reply_agg_tx_stats.response++;
744 case AGG_TX_STATE_DUMP_TX_MSK:
745 priv->reply_agg_tx_stats.dump_tx++;
747 case AGG_TX_STATE_DELAY_TX_MSK:
748 priv->reply_agg_tx_stats.delay_tx++;
751 priv->reply_agg_tx_stats.unknown++;
756 static void iwl_rx_reply_tx_agg(struct iwl_priv *priv,
757 struct iwlagn_tx_resp *tx_resp)
759 struct agg_tx_status *frame_status = &tx_resp->status;
760 int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
761 IWLAGN_TX_RES_TID_POS;
762 int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
763 IWLAGN_TX_RES_RA_POS;
764 struct iwl_ht_agg *agg = &priv->shrd->tid_data[sta_id][tid].agg;
765 u32 status = le16_to_cpu(tx_resp->status.status);
768 if (agg->wait_for_ba)
769 IWL_DEBUG_TX_REPLY(priv,
770 "got tx response w/o block-ack\n");
772 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
773 agg->wait_for_ba = (tx_resp->frame_count > 1);
776 * If the BT kill count is non-zero, we'll get this
777 * notification again.
779 if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
780 priv->cfg->bt_params &&
781 priv->cfg->bt_params->advanced_bt_coexist) {
782 IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n");
785 /* Construct bit-map of pending frames within Tx window */
786 for (i = 0; i < tx_resp->frame_count; i++) {
787 u16 fstatus = le16_to_cpu(frame_status[i].status);
789 if (status & AGG_TX_STATUS_MSK)
790 iwlagn_count_agg_tx_err_status(priv, fstatus);
792 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
793 AGG_TX_STATE_ABORT_MSK))
796 IWL_DEBUG_TX_REPLY(priv, "status %s (0x%08x), "
797 "try-count (0x%08x)\n",
798 iwl_get_agg_tx_fail_reason(fstatus),
799 fstatus & AGG_TX_STATUS_MSK,
800 fstatus & AGG_TX_TRY_MSK);
804 #ifdef CONFIG_IWLWIFI_DEBUG
805 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
807 const char *iwl_get_agg_tx_fail_reason(u16 status)
809 status &= AGG_TX_STATUS_MSK;
811 case AGG_TX_STATE_TRANSMITTED:
813 AGG_TX_STATE_FAIL(UNDERRUN_MSK);
814 AGG_TX_STATE_FAIL(BT_PRIO_MSK);
815 AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
816 AGG_TX_STATE_FAIL(ABORT_MSK);
817 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
818 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
819 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
820 AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
821 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
822 AGG_TX_STATE_FAIL(RESPONSE_MSK);
823 AGG_TX_STATE_FAIL(DUMP_TX_MSK);
824 AGG_TX_STATE_FAIL(DELAY_TX_MSK);
829 #endif /* CONFIG_IWLWIFI_DEBUG */
831 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
833 return le32_to_cpup((__le32 *)&tx_resp->status +
834 tx_resp->frame_count) & MAX_SN;
837 static void iwl_free_tfds_in_queue(struct iwl_priv *priv,
838 int sta_id, int tid, int freed)
840 lockdep_assert_held(&priv->shrd->sta_lock);
842 if (priv->shrd->tid_data[sta_id][tid].tfds_in_queue >= freed)
843 priv->shrd->tid_data[sta_id][tid].tfds_in_queue -= freed;
845 IWL_DEBUG_TX(priv, "free more than tfds_in_queue (%u:%d)\n",
846 priv->shrd->tid_data[sta_id][tid].tfds_in_queue,
848 priv->shrd->tid_data[sta_id][tid].tfds_in_queue = 0;
852 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
854 status &= TX_STATUS_MSK;
857 case TX_STATUS_POSTPONE_DELAY:
858 priv->reply_tx_stats.pp_delay++;
860 case TX_STATUS_POSTPONE_FEW_BYTES:
861 priv->reply_tx_stats.pp_few_bytes++;
863 case TX_STATUS_POSTPONE_BT_PRIO:
864 priv->reply_tx_stats.pp_bt_prio++;
866 case TX_STATUS_POSTPONE_QUIET_PERIOD:
867 priv->reply_tx_stats.pp_quiet_period++;
869 case TX_STATUS_POSTPONE_CALC_TTAK:
870 priv->reply_tx_stats.pp_calc_ttak++;
872 case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
873 priv->reply_tx_stats.int_crossed_retry++;
875 case TX_STATUS_FAIL_SHORT_LIMIT:
876 priv->reply_tx_stats.short_limit++;
878 case TX_STATUS_FAIL_LONG_LIMIT:
879 priv->reply_tx_stats.long_limit++;
881 case TX_STATUS_FAIL_FIFO_UNDERRUN:
882 priv->reply_tx_stats.fifo_underrun++;
884 case TX_STATUS_FAIL_DRAIN_FLOW:
885 priv->reply_tx_stats.drain_flow++;
887 case TX_STATUS_FAIL_RFKILL_FLUSH:
888 priv->reply_tx_stats.rfkill_flush++;
890 case TX_STATUS_FAIL_LIFE_EXPIRE:
891 priv->reply_tx_stats.life_expire++;
893 case TX_STATUS_FAIL_DEST_PS:
894 priv->reply_tx_stats.dest_ps++;
896 case TX_STATUS_FAIL_HOST_ABORTED:
897 priv->reply_tx_stats.host_abort++;
899 case TX_STATUS_FAIL_BT_RETRY:
900 priv->reply_tx_stats.bt_retry++;
902 case TX_STATUS_FAIL_STA_INVALID:
903 priv->reply_tx_stats.sta_invalid++;
905 case TX_STATUS_FAIL_FRAG_DROPPED:
906 priv->reply_tx_stats.frag_drop++;
908 case TX_STATUS_FAIL_TID_DISABLE:
909 priv->reply_tx_stats.tid_disable++;
911 case TX_STATUS_FAIL_FIFO_FLUSHED:
912 priv->reply_tx_stats.fifo_flush++;
914 case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
915 priv->reply_tx_stats.insuff_cf_poll++;
917 case TX_STATUS_FAIL_PASSIVE_NO_RX:
918 priv->reply_tx_stats.fail_hw_drop++;
920 case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
921 priv->reply_tx_stats.sta_color_mismatch++;
924 priv->reply_tx_stats.unknown++;
929 static void iwlagn_set_tx_status(struct iwl_priv *priv,
930 struct ieee80211_tx_info *info,
931 struct iwlagn_tx_resp *tx_resp,
934 u16 status = le16_to_cpu(tx_resp->status.status);
936 info->status.rates[0].count = tx_resp->failure_frame + 1;
938 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
939 info->flags |= iwl_tx_status_to_mac80211(status);
940 iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
942 if (!iwl_is_tx_success(status))
943 iwlagn_count_tx_err_status(priv, status);
946 static void iwl_check_abort_status(struct iwl_priv *priv,
947 u8 frame_count, u32 status)
949 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
950 IWL_ERR(priv, "Tx flush command to flush out all frames\n");
951 if (!test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
952 queue_work(priv->shrd->workqueue, &priv->tx_flush);
956 void iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
958 struct iwl_rx_packet *pkt = rxb_addr(rxb);
959 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
960 int txq_id = SEQ_TO_QUEUE(sequence);
961 int cmd_index = SEQ_TO_INDEX(sequence);
962 struct iwl_tx_queue *txq = &priv->txq[txq_id];
963 struct iwlagn_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
964 struct ieee80211_hdr *hdr;
965 u32 status = le16_to_cpu(tx_resp->status.status);
966 u32 ssn = iwlagn_get_scd_ssn(tx_resp);
970 struct ieee80211_tx_info *info;
972 struct sk_buff_head skbs;
974 struct iwl_rxon_context *ctx;
976 if ((cmd_index >= txq->q.n_bd) ||
977 (iwl_queue_used(&txq->q, cmd_index) == 0)) {
978 IWL_ERR(priv, "%s: Read index for DMA queue txq_id (%d) "
979 "cmd_index %d is out of range [0-%d] %d %d\n",
980 __func__, txq_id, cmd_index, txq->q.n_bd,
981 txq->q.write_ptr, txq->q.read_ptr);
985 txq->time_stamp = jiffies;
987 tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
988 IWLAGN_TX_RES_TID_POS;
989 sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
990 IWLAGN_TX_RES_RA_POS;
992 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
994 if (txq->sched_retry)
995 iwl_rx_reply_tx_agg(priv, tx_resp);
997 if (tx_resp->frame_count == 1) {
998 bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE);
1000 __skb_queue_head_init(&skbs);
1001 /*we can free until ssn % q.n_bd not inclusive */
1002 iwl_trans_reclaim(trans(priv), txq_id, ssn, status, &skbs);
1004 while (!skb_queue_empty(&skbs)) {
1005 skb = __skb_dequeue(&skbs);
1006 hdr = (struct ieee80211_hdr *)skb->data;
1008 if (!ieee80211_is_data_qos(hdr->frame_control))
1009 priv->last_seq_ctl = tx_resp->seq_ctl;
1011 info = IEEE80211_SKB_CB(skb);
1012 ctx = info->driver_data[0];
1014 memset(&info->status, 0, sizeof(info->status));
1016 if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
1017 iwl_is_associated_ctx(ctx) && ctx->vif &&
1018 ctx->vif->type == NL80211_IFTYPE_STATION) {
1019 ctx->last_tx_rejected = true;
1020 iwl_stop_queue(priv, &priv->txq[txq_id]);
1022 IWL_DEBUG_TX_REPLY(priv,
1023 "TXQ %d status %s (0x%08x) "
1024 "rate_n_flags 0x%x retries %d\n",
1026 iwl_get_tx_fail_reason(status),
1028 le32_to_cpu(tx_resp->rate_n_flags),
1029 tx_resp->failure_frame);
1031 IWL_DEBUG_TX_REPLY(priv,
1032 "FrameCnt = %d, idx=%d\n",
1033 tx_resp->frame_count, cmd_index);
1036 /* check if BAR is needed */
1037 if (is_agg && !iwl_is_tx_success(status))
1038 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1039 iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb),
1042 iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1);
1044 ieee80211_tx_status_irqsafe(priv->hw, skb);
1049 WARN_ON(!is_agg && freed != 1);
1051 iwl_free_tfds_in_queue(priv, sta_id, tid, freed);
1052 iwlagn_txq_check_empty(priv, sta_id, tid, txq_id);
1055 iwl_check_abort_status(priv, tx_resp->frame_count, status);
1056 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1060 * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
1062 * Handles block-acknowledge notification from device, which reports success
1063 * of frames sent via aggregation.
1065 void iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
1066 struct iwl_rx_mem_buffer *rxb)
1068 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1069 struct iwl_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
1070 struct iwl_tx_queue *txq = NULL;
1071 struct iwl_ht_agg *agg;
1072 struct sk_buff_head reclaimed_skbs;
1073 struct ieee80211_tx_info *info;
1074 struct ieee80211_hdr *hdr;
1075 struct sk_buff *skb;
1076 unsigned long flags;
1082 /* "flow" corresponds to Tx queue */
1083 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
1085 /* "ssn" is start of block-ack Tx window, corresponds to index
1086 * (in Tx queue's circular buffer) of first TFD/frame in window */
1087 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
1089 if (scd_flow >= hw_params(priv).max_txq_num) {
1091 "BUG_ON scd_flow is bigger than number of queues\n");
1095 txq = &priv->txq[scd_flow];
1096 sta_id = ba_resp->sta_id;
1098 agg = &priv->shrd->tid_data[sta_id][tid].agg;
1100 /* Find index of block-ack window */
1101 index = ba_resp_scd_ssn & (txq->q.n_bd - 1);
1103 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1105 if (unlikely(agg->txq_id != scd_flow)) {
1107 * FIXME: this is a uCode bug which need to be addressed,
1108 * log the information and return for now!
1109 * since it is possible happen very often and in order
1110 * not to fill the syslog, don't enable the logging by default
1112 IWL_DEBUG_TX_REPLY(priv,
1113 "BA scd_flow %d does not match txq_id %d\n",
1114 scd_flow, agg->txq_id);
1115 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1119 if (unlikely(!agg->wait_for_ba)) {
1120 if (unlikely(ba_resp->bitmap))
1121 IWL_ERR(priv, "Received BA when not expected\n");
1122 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1126 IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
1129 (u8 *) &ba_resp->sta_addr_lo32,
1131 IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, "
1132 "scd_flow = %d, scd_ssn = %d\n",
1135 (unsigned long long)le64_to_cpu(ba_resp->bitmap),
1139 /* Mark that the expected block-ack response arrived */
1140 agg->wait_for_ba = 0;
1142 /* Sanity check values reported by uCode */
1143 if (ba_resp->txed_2_done > ba_resp->txed) {
1144 IWL_DEBUG_TX_REPLY(priv,
1145 "bogus sent(%d) and ack(%d) count\n",
1146 ba_resp->txed, ba_resp->txed_2_done);
1148 * set txed_2_done = txed,
1149 * so it won't impact rate scale
1151 ba_resp->txed = ba_resp->txed_2_done;
1153 IWL_DEBUG_HT(priv, "agg frames sent:%d, acked:%d\n",
1154 ba_resp->txed, ba_resp->txed_2_done);
1156 __skb_queue_head_init(&reclaimed_skbs);
1158 /* Release all TFDs before the SSN, i.e. all TFDs in front of
1159 * block-ack window (we assume that they've been successfully
1160 * transmitted ... if not, it's too late anyway). */
1161 iwl_trans_reclaim(trans(priv), scd_flow, ba_resp_scd_ssn, 0,
1164 while (!skb_queue_empty(&reclaimed_skbs)) {
1166 skb = __skb_dequeue(&reclaimed_skbs);
1167 hdr = (struct ieee80211_hdr *)skb->data;
1169 if (ieee80211_is_data_qos(hdr->frame_control))
1175 /* this is the first skb we deliver in this batch */
1176 /* put the rate scaling data there */
1177 info = IEEE80211_SKB_CB(skb);
1178 memset(&info->status, 0, sizeof(info->status));
1179 info->flags |= IEEE80211_TX_STAT_ACK;
1180 info->flags |= IEEE80211_TX_STAT_AMPDU;
1181 info->status.ampdu_ack_len = ba_resp->txed_2_done;
1182 info->status.ampdu_len = ba_resp->txed;
1183 iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags,
1187 ieee80211_tx_status_irqsafe(priv->hw, skb);
1190 iwl_free_tfds_in_queue(priv, sta_id, tid, freed);
1191 iwlagn_txq_check_empty(priv, sta_id, tid, scd_flow);
1193 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);