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"
46 * mac80211 queues, ACs, hardware queues, FIFOs.
48 * Cf. http://wireless.kernel.org/en/developers/Documentation/mac80211/queues
50 * Mac80211 uses the following numbers, which we get as from it
51 * by way of skb_get_queue_mapping(skb):
59 * Regular (not A-MPDU) frames are put into hardware queues corresponding
60 * to the FIFOs, see comments in iwl-prph.h. Aggregated frames get their
61 * own queue per aggregation session (RA/TID combination), such queues are
62 * set up to map into FIFOs too, for which we need an AC->FIFO mapping. In
63 * order to map frames to the right queue, we also need an AC->hw queue
64 * mapping. This is implemented here.
66 * Due to the way hw queues are set up (by the hw specific modules like
67 * iwl-4965.c, iwl-5000.c etc.), the AC->hw queue mapping is the identity
71 static const u8 tid_to_ac[] = {
82 static inline int get_ac_from_tid(u16 tid)
84 if (likely(tid < ARRAY_SIZE(tid_to_ac)))
85 return tid_to_ac[tid];
87 /* no support for TIDs 8-15 yet */
91 static inline int get_fifo_from_tid(struct iwl_rxon_context *ctx, u16 tid)
93 if (likely(tid < ARRAY_SIZE(tid_to_ac)))
94 return ctx->ac_to_fifo[tid_to_ac[tid]];
96 /* no support for TIDs 8-15 yet */
100 static int iwlagn_txq_agg_enable(struct iwl_priv *priv, int txq_id, int sta_id,
103 if ((IWLAGN_FIRST_AMPDU_QUEUE > txq_id) ||
104 (IWLAGN_FIRST_AMPDU_QUEUE +
105 hw_params(priv).num_ampdu_queues <= txq_id)) {
107 "queue number out of range: %d, must be %d to %d\n",
108 txq_id, IWLAGN_FIRST_AMPDU_QUEUE,
109 IWLAGN_FIRST_AMPDU_QUEUE +
110 hw_params(priv).num_ampdu_queues - 1);
114 /* Modify device's station table to Tx this TID */
115 return iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
118 static void iwlagn_tx_cmd_protection(struct iwl_priv *priv,
119 struct ieee80211_tx_info *info,
120 __le16 fc, __le32 *tx_flags)
122 if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS ||
123 info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT ||
124 info->flags & IEEE80211_TX_CTL_AMPDU)
125 *tx_flags |= TX_CMD_FLG_PROT_REQUIRE_MSK;
129 * handle build REPLY_TX command notification.
131 static void iwlagn_tx_cmd_build_basic(struct iwl_priv *priv,
133 struct iwl_tx_cmd *tx_cmd,
134 struct ieee80211_tx_info *info,
135 struct ieee80211_hdr *hdr, u8 sta_id)
137 __le16 fc = hdr->frame_control;
138 __le32 tx_flags = tx_cmd->tx_flags;
140 tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
142 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
143 tx_flags |= TX_CMD_FLG_ACK_MSK;
145 tx_flags &= ~TX_CMD_FLG_ACK_MSK;
147 if (ieee80211_is_probe_resp(fc))
148 tx_flags |= TX_CMD_FLG_TSF_MSK;
149 else if (ieee80211_is_back_req(fc))
150 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
151 else if (info->band == IEEE80211_BAND_2GHZ &&
152 priv->cfg->bt_params &&
153 priv->cfg->bt_params->advanced_bt_coexist &&
154 (ieee80211_is_auth(fc) || ieee80211_is_assoc_req(fc) ||
155 ieee80211_is_reassoc_req(fc) ||
156 skb->protocol == cpu_to_be16(ETH_P_PAE)))
157 tx_flags |= TX_CMD_FLG_IGNORE_BT;
160 tx_cmd->sta_id = sta_id;
161 if (ieee80211_has_morefrags(fc))
162 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
164 if (ieee80211_is_data_qos(fc)) {
165 u8 *qc = ieee80211_get_qos_ctl(hdr);
166 tx_cmd->tid_tspec = qc[0] & 0xf;
167 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
169 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
172 iwlagn_tx_cmd_protection(priv, info, fc, &tx_flags);
174 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
175 if (ieee80211_is_mgmt(fc)) {
176 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
177 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
179 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
181 tx_cmd->timeout.pm_frame_timeout = 0;
184 tx_cmd->driver_txop = 0;
185 tx_cmd->tx_flags = tx_flags;
186 tx_cmd->next_frame_len = 0;
189 #define RTS_DFAULT_RETRY_LIMIT 60
191 static void iwlagn_tx_cmd_build_rate(struct iwl_priv *priv,
192 struct iwl_tx_cmd *tx_cmd,
193 struct ieee80211_tx_info *info,
202 /* Set retry limit on DATA packets and Probe Responses*/
203 if (ieee80211_is_probe_resp(fc))
204 data_retry_limit = 3;
206 data_retry_limit = IWLAGN_DEFAULT_TX_RETRY;
207 tx_cmd->data_retry_limit = data_retry_limit;
209 /* Set retry limit on RTS packets */
210 rts_retry_limit = RTS_DFAULT_RETRY_LIMIT;
211 if (data_retry_limit < rts_retry_limit)
212 rts_retry_limit = data_retry_limit;
213 tx_cmd->rts_retry_limit = rts_retry_limit;
215 /* DATA packets will use the uCode station table for rate/antenna
217 if (ieee80211_is_data(fc)) {
218 tx_cmd->initial_rate_index = 0;
219 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
220 #ifdef CONFIG_IWLWIFI_DEVICE_SVTOOL
221 if (priv->tm_fixed_rate) {
223 * rate overwrite by testmode
224 * we not only send lq command to change rate
225 * we also re-enforce per data pkt base.
227 tx_cmd->tx_flags &= ~TX_CMD_FLG_STA_RATE_MSK;
228 memcpy(&tx_cmd->rate_n_flags, &priv->tm_fixed_rate,
229 sizeof(tx_cmd->rate_n_flags));
236 * If the current TX rate stored in mac80211 has the MCS bit set, it's
237 * not really a TX rate. Thus, we use the lowest supported rate for
238 * this band. Also use the lowest supported rate if the stored rate
241 rate_idx = info->control.rates[0].idx;
242 if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS ||
243 (rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY))
244 rate_idx = rate_lowest_index(&priv->bands[info->band],
246 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
247 if (info->band == IEEE80211_BAND_5GHZ)
248 rate_idx += IWL_FIRST_OFDM_RATE;
249 /* Get PLCP rate for tx_cmd->rate_n_flags */
250 rate_plcp = iwl_rates[rate_idx].plcp;
251 /* Zero out flags for this packet */
254 /* Set CCK flag as needed */
255 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
256 rate_flags |= RATE_MCS_CCK_MSK;
258 /* Set up antennas */
259 if (priv->cfg->bt_params &&
260 priv->cfg->bt_params->advanced_bt_coexist &&
261 priv->bt_full_concurrent) {
262 /* operated as 1x1 in full concurrency mode */
263 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
264 first_antenna(hw_params(priv).valid_tx_ant));
266 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
267 hw_params(priv).valid_tx_ant);
268 rate_flags |= iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
270 /* Set the rate in the TX cmd */
271 tx_cmd->rate_n_flags = iwl_hw_set_rate_n_flags(rate_plcp, rate_flags);
274 static void iwlagn_tx_cmd_build_hwcrypto(struct iwl_priv *priv,
275 struct ieee80211_tx_info *info,
276 struct iwl_tx_cmd *tx_cmd,
277 struct sk_buff *skb_frag,
280 struct ieee80211_key_conf *keyconf = info->control.hw_key;
282 switch (keyconf->cipher) {
283 case WLAN_CIPHER_SUITE_CCMP:
284 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
285 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
286 if (info->flags & IEEE80211_TX_CTL_AMPDU)
287 tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
288 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
291 case WLAN_CIPHER_SUITE_TKIP:
292 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
293 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
294 IWL_DEBUG_TX(priv, "tx_cmd with tkip hwcrypto\n");
297 case WLAN_CIPHER_SUITE_WEP104:
298 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
300 case WLAN_CIPHER_SUITE_WEP40:
301 tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP |
302 (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
304 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
306 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
307 "with key %d\n", keyconf->keyidx);
311 IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher);
317 * start REPLY_TX command process
319 int iwlagn_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
321 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
322 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
323 struct iwl_station_priv *sta_priv = NULL;
324 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
325 struct iwl_tx_cmd *tx_cmd;
337 if (info->control.vif)
338 ctx = iwl_rxon_ctx_from_vif(info->control.vif);
340 spin_lock_irqsave(&priv->shrd->lock, flags);
341 if (iwl_is_rfkill(priv->shrd)) {
342 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
343 goto drop_unlock_priv;
346 fc = hdr->frame_control;
348 #ifdef CONFIG_IWLWIFI_DEBUG
349 if (ieee80211_is_auth(fc))
350 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
351 else if (ieee80211_is_assoc_req(fc))
352 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
353 else if (ieee80211_is_reassoc_req(fc))
354 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
357 hdr_len = ieee80211_hdrlen(fc);
359 /* For management frames use broadcast id to do not break aggregation */
360 if (!ieee80211_is_data(fc))
361 sta_id = ctx->bcast_sta_id;
363 /* Find index into station table for destination station */
364 sta_id = iwl_sta_id_or_broadcast(priv, ctx, info->control.sta);
365 if (sta_id == IWL_INVALID_STATION) {
366 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
368 goto drop_unlock_priv;
372 IWL_DEBUG_TX(priv, "station Id %d\n", sta_id);
374 if (info->control.sta)
375 sta_priv = (void *)info->control.sta->drv_priv;
377 if (sta_priv && sta_priv->asleep &&
378 (info->flags & IEEE80211_TX_CTL_PSPOLL_RESPONSE)) {
380 * This sends an asynchronous command to the device,
381 * but we can rely on it being processed before the
382 * next frame is processed -- and the next frame to
383 * this station is the one that will consume this
385 * For now set the counter to just 1 since we do not
388 iwl_sta_modify_sleep_tx_count(priv, sta_id, 1);
392 * Send this frame after DTIM -- there's a special queue
393 * reserved for this for contexts that support AP mode.
395 if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
396 txq_id = ctx->mcast_queue;
398 * The microcode will clear the more data
399 * bit in the last frame it transmits.
401 hdr->frame_control |=
402 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
403 } else if (info->flags & IEEE80211_TX_CTL_TX_OFFCHAN)
404 txq_id = IWL_AUX_QUEUE;
406 txq_id = ctx->ac_to_queue[skb_get_queue_mapping(skb)];
408 /* irqs already disabled/saved above when locking priv->shrd->lock */
409 spin_lock(&priv->shrd->sta_lock);
411 if (ieee80211_is_data_qos(fc)) {
413 struct iwl_tid_data *tid_data;
414 qc = ieee80211_get_qos_ctl(hdr);
415 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
416 tid_data = &priv->shrd->tid_data[sta_id][tid];
418 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
419 goto drop_unlock_sta;
421 seq_number = tid_data->seq_number;
422 seq_number &= IEEE80211_SCTL_SEQ;
423 hdr->seq_ctrl = hdr->seq_ctrl &
424 cpu_to_le16(IEEE80211_SCTL_FRAG);
425 hdr->seq_ctrl |= cpu_to_le16(seq_number);
427 /* aggregation is on for this <sta,tid> */
428 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
429 tid_data->agg.state == IWL_AGG_ON) {
430 txq_id = tid_data->agg.txq_id;
435 tx_cmd = iwl_trans_get_tx_cmd(trans(priv), txq_id);
436 if (unlikely(!tx_cmd))
437 goto drop_unlock_sta;
439 /* Copy MAC header from skb into command buffer */
440 memcpy(tx_cmd->hdr, hdr, hdr_len);
442 /* Total # bytes to be transmitted */
444 tx_cmd->len = cpu_to_le16(len);
446 if (info->control.hw_key)
447 iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb, sta_id);
449 /* TODO need this for burst mode later on */
450 iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id);
451 iwl_dbg_log_tx_data_frame(priv, len, hdr);
453 iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, fc);
455 iwl_update_stats(priv, true, fc, len);
457 info->driver_data[0] = ctx;
459 if (iwl_trans_tx(trans(priv), skb, tx_cmd, txq_id, fc, is_agg))
460 goto drop_unlock_sta;
462 if (ieee80211_is_data_qos(fc)) {
463 priv->shrd->tid_data[sta_id][tid].tfds_in_queue++;
464 if (!ieee80211_has_morefrags(fc))
465 priv->shrd->tid_data[sta_id][tid].seq_number =
469 spin_unlock(&priv->shrd->sta_lock);
470 spin_unlock_irqrestore(&priv->shrd->lock, flags);
473 * Avoid atomic ops if it isn't an associated client.
474 * Also, if this is a packet for aggregation, don't
475 * increase the counter because the ucode will stop
476 * aggregation queues when their respective station
479 if (sta_priv && sta_priv->client && !is_agg)
480 atomic_inc(&sta_priv->pending_frames);
485 spin_unlock(&priv->shrd->sta_lock);
487 spin_unlock_irqrestore(&priv->shrd->lock, flags);
492 * Find first available (lowest unused) Tx Queue, mark it "active".
493 * Called only when finding queue for aggregation.
494 * Should never return anything < 7, because they should already
495 * be in use as EDCA AC (0-3), Command (4), reserved (5, 6)
497 static int iwlagn_txq_ctx_activate_free(struct iwl_priv *priv)
501 for (txq_id = 0; txq_id < hw_params(priv).max_txq_num; txq_id++)
502 if (!test_and_set_bit(txq_id, &priv->txq_ctx_active_msk))
507 int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
508 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
515 struct iwl_tid_data *tid_data;
517 tx_fifo = get_fifo_from_tid(iwl_rxon_ctx_from_vif(vif), tid);
518 if (unlikely(tx_fifo < 0))
521 IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n",
524 sta_id = iwl_sta_id(sta);
525 if (sta_id == IWL_INVALID_STATION) {
526 IWL_ERR(priv, "Start AGG on invalid station\n");
529 if (unlikely(tid >= IWL_MAX_TID_COUNT))
532 if (priv->shrd->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) {
533 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
537 txq_id = iwlagn_txq_ctx_activate_free(priv);
539 IWL_ERR(priv, "No free aggregation queue available\n");
543 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
544 tid_data = &priv->shrd->tid_data[sta_id][tid];
545 *ssn = SEQ_TO_SN(tid_data->seq_number);
546 tid_data->agg.txq_id = txq_id;
547 tid_data->agg.tx_fifo = tx_fifo;
548 iwl_set_swq_id(&priv->txq[txq_id], get_ac_from_tid(tid), txq_id);
549 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
551 ret = iwlagn_txq_agg_enable(priv, txq_id, sta_id, tid);
555 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
556 tid_data = &priv->shrd->tid_data[sta_id][tid];
557 if (tid_data->tfds_in_queue == 0) {
558 IWL_DEBUG_HT(priv, "HW queue is empty\n");
559 tid_data->agg.state = IWL_AGG_ON;
560 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
562 IWL_DEBUG_HT(priv, "HW queue is NOT empty: %d packets in HW queue\n",
563 tid_data->tfds_in_queue);
564 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
566 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
570 int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif,
571 struct ieee80211_sta *sta, u16 tid)
573 int tx_fifo_id, txq_id, sta_id, ssn;
574 struct iwl_tid_data *tid_data;
575 int write_ptr, read_ptr;
578 tx_fifo_id = get_fifo_from_tid(iwl_rxon_ctx_from_vif(vif), tid);
579 if (unlikely(tx_fifo_id < 0))
582 sta_id = iwl_sta_id(sta);
584 if (sta_id == IWL_INVALID_STATION) {
585 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
589 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
591 tid_data = &priv->shrd->tid_data[sta_id][tid];
592 ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4;
593 txq_id = tid_data->agg.txq_id;
595 switch (priv->shrd->tid_data[sta_id][tid].agg.state) {
596 case IWL_EMPTYING_HW_QUEUE_ADDBA:
598 * This can happen if the peer stops aggregation
599 * again before we've had a chance to drain the
600 * queue we selected previously, i.e. before the
601 * session was really started completely.
603 IWL_DEBUG_HT(priv, "AGG stop before setup done\n");
608 IWL_WARN(priv, "Stopping AGG while state not ON or starting\n");
611 write_ptr = priv->txq[txq_id].q.write_ptr;
612 read_ptr = priv->txq[txq_id].q.read_ptr;
614 /* The queue is not empty */
615 if (write_ptr != read_ptr) {
616 IWL_DEBUG_HT(priv, "Stopping a non empty AGG HW QUEUE\n");
617 priv->shrd->tid_data[sta_id][tid].agg.state =
618 IWL_EMPTYING_HW_QUEUE_DELBA;
619 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
623 IWL_DEBUG_HT(priv, "HW queue is empty\n");
625 priv->shrd->tid_data[sta_id][tid].agg.state = IWL_AGG_OFF;
627 /* do not restore/save irqs */
628 spin_unlock(&priv->shrd->sta_lock);
629 spin_lock(&priv->shrd->lock);
632 * the only reason this call can fail is queue number out of range,
633 * which can happen if uCode is reloaded and all the station
634 * information are lost. if it is outside the range, there is no need
635 * to deactivate the uCode queue, just return "success" to allow
636 * mac80211 to clean up it own data.
638 iwl_trans_txq_agg_disable(trans(priv), txq_id, ssn, tx_fifo_id);
639 spin_unlock_irqrestore(&priv->shrd->lock, flags);
641 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
646 static int iwlagn_txq_check_empty(struct iwl_priv *priv,
647 int sta_id, u8 tid, int txq_id)
649 struct iwl_queue *q = &priv->txq[txq_id].q;
650 u8 *addr = priv->stations[sta_id].sta.sta.addr;
651 struct iwl_tid_data *tid_data = &priv->shrd->tid_data[sta_id][tid];
652 struct iwl_rxon_context *ctx;
654 ctx = &priv->contexts[priv->stations[sta_id].ctxid];
656 lockdep_assert_held(&priv->shrd->sta_lock);
658 switch (priv->shrd->tid_data[sta_id][tid].agg.state) {
659 case IWL_EMPTYING_HW_QUEUE_DELBA:
660 /* We are reclaiming the last packet of the */
661 /* aggregated HW queue */
662 if ((txq_id == tid_data->agg.txq_id) &&
663 (q->read_ptr == q->write_ptr)) {
664 u16 ssn = SEQ_TO_SN(tid_data->seq_number);
665 int tx_fifo = get_fifo_from_tid(ctx, tid);
666 IWL_DEBUG_HT(priv, "HW queue empty: continue DELBA flow\n");
667 iwl_trans_txq_agg_disable(trans(priv), txq_id,
669 tid_data->agg.state = IWL_AGG_OFF;
670 ieee80211_stop_tx_ba_cb_irqsafe(ctx->vif, addr, tid);
673 case IWL_EMPTYING_HW_QUEUE_ADDBA:
674 /* We are reclaiming the last packet of the queue */
675 if (tid_data->tfds_in_queue == 0) {
676 IWL_DEBUG_HT(priv, "HW queue empty: continue ADDBA flow\n");
677 tid_data->agg.state = IWL_AGG_ON;
678 ieee80211_start_tx_ba_cb_irqsafe(ctx->vif, addr, tid);
686 static void iwlagn_non_agg_tx_status(struct iwl_priv *priv,
687 struct iwl_rxon_context *ctx,
690 struct ieee80211_sta *sta;
691 struct iwl_station_priv *sta_priv;
694 sta = ieee80211_find_sta(ctx->vif, addr1);
696 sta_priv = (void *)sta->drv_priv;
697 /* avoid atomic ops if this isn't a client */
698 if (sta_priv->client &&
699 atomic_dec_return(&sta_priv->pending_frames) == 0)
700 ieee80211_sta_block_awake(priv->hw, sta, false);
706 * translate ucode response to mac80211 tx status control values
708 static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
709 struct ieee80211_tx_info *info)
711 struct ieee80211_tx_rate *r = &info->control.rates[0];
713 info->antenna_sel_tx =
714 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
715 if (rate_n_flags & RATE_MCS_HT_MSK)
716 r->flags |= IEEE80211_TX_RC_MCS;
717 if (rate_n_flags & RATE_MCS_GF_MSK)
718 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
719 if (rate_n_flags & RATE_MCS_HT40_MSK)
720 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
721 if (rate_n_flags & RATE_MCS_DUP_MSK)
722 r->flags |= IEEE80211_TX_RC_DUP_DATA;
723 if (rate_n_flags & RATE_MCS_SGI_MSK)
724 r->flags |= IEEE80211_TX_RC_SHORT_GI;
725 r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band);
728 #ifdef CONFIG_IWLWIFI_DEBUG
729 const char *iwl_get_tx_fail_reason(u32 status)
731 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
732 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
734 switch (status & TX_STATUS_MSK) {
735 case TX_STATUS_SUCCESS:
737 TX_STATUS_POSTPONE(DELAY);
738 TX_STATUS_POSTPONE(FEW_BYTES);
739 TX_STATUS_POSTPONE(BT_PRIO);
740 TX_STATUS_POSTPONE(QUIET_PERIOD);
741 TX_STATUS_POSTPONE(CALC_TTAK);
742 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
743 TX_STATUS_FAIL(SHORT_LIMIT);
744 TX_STATUS_FAIL(LONG_LIMIT);
745 TX_STATUS_FAIL(FIFO_UNDERRUN);
746 TX_STATUS_FAIL(DRAIN_FLOW);
747 TX_STATUS_FAIL(RFKILL_FLUSH);
748 TX_STATUS_FAIL(LIFE_EXPIRE);
749 TX_STATUS_FAIL(DEST_PS);
750 TX_STATUS_FAIL(HOST_ABORTED);
751 TX_STATUS_FAIL(BT_RETRY);
752 TX_STATUS_FAIL(STA_INVALID);
753 TX_STATUS_FAIL(FRAG_DROPPED);
754 TX_STATUS_FAIL(TID_DISABLE);
755 TX_STATUS_FAIL(FIFO_FLUSHED);
756 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
757 TX_STATUS_FAIL(PASSIVE_NO_RX);
758 TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
763 #undef TX_STATUS_FAIL
764 #undef TX_STATUS_POSTPONE
766 #endif /* CONFIG_IWLWIFI_DEBUG */
768 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
770 status &= AGG_TX_STATUS_MSK;
773 case AGG_TX_STATE_UNDERRUN_MSK:
774 priv->reply_agg_tx_stats.underrun++;
776 case AGG_TX_STATE_BT_PRIO_MSK:
777 priv->reply_agg_tx_stats.bt_prio++;
779 case AGG_TX_STATE_FEW_BYTES_MSK:
780 priv->reply_agg_tx_stats.few_bytes++;
782 case AGG_TX_STATE_ABORT_MSK:
783 priv->reply_agg_tx_stats.abort++;
785 case AGG_TX_STATE_LAST_SENT_TTL_MSK:
786 priv->reply_agg_tx_stats.last_sent_ttl++;
788 case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
789 priv->reply_agg_tx_stats.last_sent_try++;
791 case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
792 priv->reply_agg_tx_stats.last_sent_bt_kill++;
794 case AGG_TX_STATE_SCD_QUERY_MSK:
795 priv->reply_agg_tx_stats.scd_query++;
797 case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
798 priv->reply_agg_tx_stats.bad_crc32++;
800 case AGG_TX_STATE_RESPONSE_MSK:
801 priv->reply_agg_tx_stats.response++;
803 case AGG_TX_STATE_DUMP_TX_MSK:
804 priv->reply_agg_tx_stats.dump_tx++;
806 case AGG_TX_STATE_DELAY_TX_MSK:
807 priv->reply_agg_tx_stats.delay_tx++;
810 priv->reply_agg_tx_stats.unknown++;
815 static void iwl_rx_reply_tx_agg(struct iwl_priv *priv,
816 struct iwlagn_tx_resp *tx_resp)
818 struct agg_tx_status *frame_status = &tx_resp->status;
819 int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
820 IWLAGN_TX_RES_TID_POS;
821 int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
822 IWLAGN_TX_RES_RA_POS;
823 struct iwl_ht_agg *agg = &priv->shrd->tid_data[sta_id][tid].agg;
824 u32 status = le16_to_cpu(tx_resp->status.status);
827 if (agg->wait_for_ba)
828 IWL_DEBUG_TX_REPLY(priv,
829 "got tx response w/o block-ack\n");
831 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
832 agg->wait_for_ba = (tx_resp->frame_count > 1);
835 * If the BT kill count is non-zero, we'll get this
836 * notification again.
838 if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
839 priv->cfg->bt_params &&
840 priv->cfg->bt_params->advanced_bt_coexist) {
841 IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n");
844 /* Construct bit-map of pending frames within Tx window */
845 for (i = 0; i < tx_resp->frame_count; i++) {
846 u16 fstatus = le16_to_cpu(frame_status[i].status);
848 if (status & AGG_TX_STATUS_MSK)
849 iwlagn_count_agg_tx_err_status(priv, fstatus);
851 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
852 AGG_TX_STATE_ABORT_MSK))
855 IWL_DEBUG_TX_REPLY(priv, "status %s (0x%08x), "
856 "try-count (0x%08x)\n",
857 iwl_get_agg_tx_fail_reason(fstatus),
858 fstatus & AGG_TX_STATUS_MSK,
859 fstatus & AGG_TX_TRY_MSK);
863 #ifdef CONFIG_IWLWIFI_DEBUG
864 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
866 const char *iwl_get_agg_tx_fail_reason(u16 status)
868 status &= AGG_TX_STATUS_MSK;
870 case AGG_TX_STATE_TRANSMITTED:
872 AGG_TX_STATE_FAIL(UNDERRUN_MSK);
873 AGG_TX_STATE_FAIL(BT_PRIO_MSK);
874 AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
875 AGG_TX_STATE_FAIL(ABORT_MSK);
876 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
877 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
878 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
879 AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
880 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
881 AGG_TX_STATE_FAIL(RESPONSE_MSK);
882 AGG_TX_STATE_FAIL(DUMP_TX_MSK);
883 AGG_TX_STATE_FAIL(DELAY_TX_MSK);
888 #endif /* CONFIG_IWLWIFI_DEBUG */
890 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
892 return le32_to_cpup((__le32 *)&tx_resp->status +
893 tx_resp->frame_count) & MAX_SN;
896 static void iwl_free_tfds_in_queue(struct iwl_priv *priv,
897 int sta_id, int tid, int freed)
899 lockdep_assert_held(&priv->shrd->sta_lock);
901 if (priv->shrd->tid_data[sta_id][tid].tfds_in_queue >= freed)
902 priv->shrd->tid_data[sta_id][tid].tfds_in_queue -= freed;
904 IWL_DEBUG_TX(priv, "free more than tfds_in_queue (%u:%d)\n",
905 priv->shrd->tid_data[sta_id][tid].tfds_in_queue,
907 priv->shrd->tid_data[sta_id][tid].tfds_in_queue = 0;
911 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
913 status &= TX_STATUS_MSK;
916 case TX_STATUS_POSTPONE_DELAY:
917 priv->reply_tx_stats.pp_delay++;
919 case TX_STATUS_POSTPONE_FEW_BYTES:
920 priv->reply_tx_stats.pp_few_bytes++;
922 case TX_STATUS_POSTPONE_BT_PRIO:
923 priv->reply_tx_stats.pp_bt_prio++;
925 case TX_STATUS_POSTPONE_QUIET_PERIOD:
926 priv->reply_tx_stats.pp_quiet_period++;
928 case TX_STATUS_POSTPONE_CALC_TTAK:
929 priv->reply_tx_stats.pp_calc_ttak++;
931 case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
932 priv->reply_tx_stats.int_crossed_retry++;
934 case TX_STATUS_FAIL_SHORT_LIMIT:
935 priv->reply_tx_stats.short_limit++;
937 case TX_STATUS_FAIL_LONG_LIMIT:
938 priv->reply_tx_stats.long_limit++;
940 case TX_STATUS_FAIL_FIFO_UNDERRUN:
941 priv->reply_tx_stats.fifo_underrun++;
943 case TX_STATUS_FAIL_DRAIN_FLOW:
944 priv->reply_tx_stats.drain_flow++;
946 case TX_STATUS_FAIL_RFKILL_FLUSH:
947 priv->reply_tx_stats.rfkill_flush++;
949 case TX_STATUS_FAIL_LIFE_EXPIRE:
950 priv->reply_tx_stats.life_expire++;
952 case TX_STATUS_FAIL_DEST_PS:
953 priv->reply_tx_stats.dest_ps++;
955 case TX_STATUS_FAIL_HOST_ABORTED:
956 priv->reply_tx_stats.host_abort++;
958 case TX_STATUS_FAIL_BT_RETRY:
959 priv->reply_tx_stats.bt_retry++;
961 case TX_STATUS_FAIL_STA_INVALID:
962 priv->reply_tx_stats.sta_invalid++;
964 case TX_STATUS_FAIL_FRAG_DROPPED:
965 priv->reply_tx_stats.frag_drop++;
967 case TX_STATUS_FAIL_TID_DISABLE:
968 priv->reply_tx_stats.tid_disable++;
970 case TX_STATUS_FAIL_FIFO_FLUSHED:
971 priv->reply_tx_stats.fifo_flush++;
973 case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
974 priv->reply_tx_stats.insuff_cf_poll++;
976 case TX_STATUS_FAIL_PASSIVE_NO_RX:
977 priv->reply_tx_stats.fail_hw_drop++;
979 case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
980 priv->reply_tx_stats.sta_color_mismatch++;
983 priv->reply_tx_stats.unknown++;
988 static void iwlagn_set_tx_status(struct iwl_priv *priv,
989 struct ieee80211_tx_info *info,
990 struct iwlagn_tx_resp *tx_resp,
993 u16 status = le16_to_cpu(tx_resp->status.status);
995 info->status.rates[0].count = tx_resp->failure_frame + 1;
997 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
998 info->flags |= iwl_tx_status_to_mac80211(status);
999 iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
1001 if (!iwl_is_tx_success(status))
1002 iwlagn_count_tx_err_status(priv, status);
1005 static void iwl_check_abort_status(struct iwl_priv *priv,
1006 u8 frame_count, u32 status)
1008 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
1009 IWL_ERR(priv, "Tx flush command to flush out all frames\n");
1010 if (!test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
1011 queue_work(priv->shrd->workqueue, &priv->tx_flush);
1015 void iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
1017 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1018 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1019 int txq_id = SEQ_TO_QUEUE(sequence);
1020 int cmd_index = SEQ_TO_INDEX(sequence);
1021 struct iwl_tx_queue *txq = &priv->txq[txq_id];
1022 struct iwlagn_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
1023 struct ieee80211_hdr *hdr;
1024 u32 status = le16_to_cpu(tx_resp->status.status);
1025 u32 ssn = iwlagn_get_scd_ssn(tx_resp);
1029 struct ieee80211_tx_info *info;
1030 unsigned long flags;
1031 struct sk_buff_head skbs;
1032 struct sk_buff *skb;
1033 struct iwl_rxon_context *ctx;
1035 if ((cmd_index >= txq->q.n_bd) ||
1036 (iwl_queue_used(&txq->q, cmd_index) == 0)) {
1037 IWL_ERR(priv, "%s: Read index for DMA queue txq_id (%d) "
1038 "cmd_index %d is out of range [0-%d] %d %d\n",
1039 __func__, txq_id, cmd_index, txq->q.n_bd,
1040 txq->q.write_ptr, txq->q.read_ptr);
1044 txq->time_stamp = jiffies;
1046 tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
1047 IWLAGN_TX_RES_TID_POS;
1048 sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
1049 IWLAGN_TX_RES_RA_POS;
1051 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1053 if (txq->sched_retry)
1054 iwl_rx_reply_tx_agg(priv, tx_resp);
1056 if (tx_resp->frame_count == 1) {
1057 bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE);
1059 __skb_queue_head_init(&skbs);
1060 /*we can free until ssn % q.n_bd not inclusive */
1061 iwl_trans_reclaim(trans(priv), txq_id, ssn, status, &skbs);
1063 while (!skb_queue_empty(&skbs)) {
1064 skb = __skb_dequeue(&skbs);
1065 hdr = (struct ieee80211_hdr *)skb->data;
1067 if (!ieee80211_is_data_qos(hdr->frame_control))
1068 priv->last_seq_ctl = tx_resp->seq_ctl;
1070 info = IEEE80211_SKB_CB(skb);
1071 ctx = info->driver_data[0];
1073 memset(&info->status, 0, sizeof(info->status));
1075 if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
1076 iwl_is_associated_ctx(ctx) && ctx->vif &&
1077 ctx->vif->type == NL80211_IFTYPE_STATION) {
1078 ctx->last_tx_rejected = true;
1079 iwl_stop_queue(priv, &priv->txq[txq_id]);
1081 IWL_DEBUG_TX_REPLY(priv,
1082 "TXQ %d status %s (0x%08x) "
1083 "rate_n_flags 0x%x retries %d\n",
1085 iwl_get_tx_fail_reason(status),
1087 le32_to_cpu(tx_resp->rate_n_flags),
1088 tx_resp->failure_frame);
1090 IWL_DEBUG_TX_REPLY(priv,
1091 "FrameCnt = %d, idx=%d\n",
1092 tx_resp->frame_count, cmd_index);
1095 /* check if BAR is needed */
1096 if (is_agg && !iwl_is_tx_success(status))
1097 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1098 iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb),
1101 iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1);
1103 ieee80211_tx_status_irqsafe(priv->hw, skb);
1108 WARN_ON(!is_agg && freed != 1);
1110 iwl_free_tfds_in_queue(priv, sta_id, tid, freed);
1111 iwlagn_txq_check_empty(priv, sta_id, tid, txq_id);
1114 iwl_check_abort_status(priv, tx_resp->frame_count, status);
1115 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1119 * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
1121 * Handles block-acknowledge notification from device, which reports success
1122 * of frames sent via aggregation.
1124 void iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
1125 struct iwl_rx_mem_buffer *rxb)
1127 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1128 struct iwl_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
1129 struct iwl_tx_queue *txq = NULL;
1130 struct iwl_ht_agg *agg;
1131 struct sk_buff_head reclaimed_skbs;
1132 struct ieee80211_tx_info *info;
1133 struct ieee80211_hdr *hdr;
1134 struct sk_buff *skb;
1135 unsigned long flags;
1141 /* "flow" corresponds to Tx queue */
1142 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
1144 /* "ssn" is start of block-ack Tx window, corresponds to index
1145 * (in Tx queue's circular buffer) of first TFD/frame in window */
1146 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
1148 if (scd_flow >= hw_params(priv).max_txq_num) {
1150 "BUG_ON scd_flow is bigger than number of queues\n");
1154 txq = &priv->txq[scd_flow];
1155 sta_id = ba_resp->sta_id;
1157 agg = &priv->shrd->tid_data[sta_id][tid].agg;
1159 /* Find index of block-ack window */
1160 index = ba_resp_scd_ssn & (txq->q.n_bd - 1);
1162 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1164 if (unlikely(agg->txq_id != scd_flow)) {
1166 * FIXME: this is a uCode bug which need to be addressed,
1167 * log the information and return for now!
1168 * since it is possible happen very often and in order
1169 * not to fill the syslog, don't enable the logging by default
1171 IWL_DEBUG_TX_REPLY(priv,
1172 "BA scd_flow %d does not match txq_id %d\n",
1173 scd_flow, agg->txq_id);
1174 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1178 if (unlikely(!agg->wait_for_ba)) {
1179 if (unlikely(ba_resp->bitmap))
1180 IWL_ERR(priv, "Received BA when not expected\n");
1181 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1185 IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
1188 (u8 *) &ba_resp->sta_addr_lo32,
1190 IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, "
1191 "scd_flow = %d, scd_ssn = %d\n",
1194 (unsigned long long)le64_to_cpu(ba_resp->bitmap),
1198 /* Mark that the expected block-ack response arrived */
1199 agg->wait_for_ba = 0;
1201 /* Sanity check values reported by uCode */
1202 if (ba_resp->txed_2_done > ba_resp->txed) {
1203 IWL_DEBUG_TX_REPLY(priv,
1204 "bogus sent(%d) and ack(%d) count\n",
1205 ba_resp->txed, ba_resp->txed_2_done);
1207 * set txed_2_done = txed,
1208 * so it won't impact rate scale
1210 ba_resp->txed = ba_resp->txed_2_done;
1212 IWL_DEBUG_HT(priv, "agg frames sent:%d, acked:%d\n",
1213 ba_resp->txed, ba_resp->txed_2_done);
1215 __skb_queue_head_init(&reclaimed_skbs);
1217 /* Release all TFDs before the SSN, i.e. all TFDs in front of
1218 * block-ack window (we assume that they've been successfully
1219 * transmitted ... if not, it's too late anyway). */
1220 iwl_trans_reclaim(trans(priv), scd_flow, ba_resp_scd_ssn, 0,
1223 while (!skb_queue_empty(&reclaimed_skbs)) {
1225 skb = __skb_dequeue(&reclaimed_skbs);
1226 hdr = (struct ieee80211_hdr *)skb->data;
1228 if (ieee80211_is_data_qos(hdr->frame_control))
1234 /* this is the first skb we deliver in this batch */
1235 /* put the rate scaling data there */
1236 info = IEEE80211_SKB_CB(skb);
1237 memset(&info->status, 0, sizeof(info->status));
1238 info->flags |= IEEE80211_TX_STAT_ACK;
1239 info->flags |= IEEE80211_TX_STAT_AMPDU;
1240 info->status.ampdu_ack_len = ba_resp->txed_2_done;
1241 info->status.ampdu_len = ba_resp->txed;
1242 iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags,
1246 ieee80211_tx_status_irqsafe(priv->hw, skb);
1249 iwl_free_tfds_in_queue(priv, sta_id, tid, freed);
1250 iwlagn_txq_check_empty(priv, sta_id, tid, scd_flow);
1252 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);