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
,
130 struct ieee80211_sta
*sta
,
140 rts_retry_limit
= IWLAGN_LOW_RETRY_LIMIT
;
141 data_retry_limit
= IWLAGN_LOW_RETRY_LIMIT
;
143 /* Set retry limit on RTS packets */
144 rts_retry_limit
= IWLAGN_RTS_DFAULT_RETRY_LIMIT
;
146 /* Set retry limit on DATA packets and Probe Responses*/
147 if (ieee80211_is_probe_resp(fc
)) {
148 data_retry_limit
= IWLAGN_MGMT_DFAULT_RETRY_LIMIT
;
150 min(data_retry_limit
, rts_retry_limit
);
151 } else if (ieee80211_is_back_req(fc
))
152 data_retry_limit
= IWLAGN_BAR_DFAULT_RETRY_LIMIT
;
154 data_retry_limit
= IWLAGN_DEFAULT_TX_RETRY
;
157 tx_cmd
->data_retry_limit
= data_retry_limit
;
158 tx_cmd
->rts_retry_limit
= rts_retry_limit
;
160 /* DATA packets will use the uCode station table for rate/antenna
162 if (ieee80211_is_data(fc
)) {
163 tx_cmd
->initial_rate_index
= 0;
164 tx_cmd
->tx_flags
|= TX_CMD_FLG_STA_RATE_MSK
;
165 #ifdef CONFIG_IWLWIFI_DEVICE_TESTMODE
166 if (priv
->tm_fixed_rate
) {
168 * rate overwrite by testmode
169 * we not only send lq command to change rate
170 * we also re-enforce per data pkt base.
172 tx_cmd
->tx_flags
&= ~TX_CMD_FLG_STA_RATE_MSK
;
173 memcpy(&tx_cmd
->rate_n_flags
, &priv
->tm_fixed_rate
,
174 sizeof(tx_cmd
->rate_n_flags
));
178 } else if (ieee80211_is_back_req(fc
))
179 tx_cmd
->tx_flags
|= TX_CMD_FLG_STA_RATE_MSK
;
182 * If the current TX rate stored in mac80211 has the MCS bit set, it's
183 * not really a TX rate. Thus, we use the lowest supported rate for
184 * this band. Also use the lowest supported rate if the stored rate
187 rate_idx
= info
->control
.rates
[0].idx
;
188 if (info
->control
.rates
[0].flags
& IEEE80211_TX_RC_MCS
||
189 (rate_idx
< 0) || (rate_idx
> IWL_RATE_COUNT_LEGACY
))
190 rate_idx
= rate_lowest_index(
191 &priv
->eeprom_data
->bands
[info
->band
], sta
);
192 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
193 if (info
->band
== IEEE80211_BAND_5GHZ
)
194 rate_idx
+= IWL_FIRST_OFDM_RATE
;
195 /* Get PLCP rate for tx_cmd->rate_n_flags */
196 rate_plcp
= iwl_rates
[rate_idx
].plcp
;
197 /* Zero out flags for this packet */
200 /* Set CCK flag as needed */
201 if ((rate_idx
>= IWL_FIRST_CCK_RATE
) && (rate_idx
<= IWL_LAST_CCK_RATE
))
202 rate_flags
|= RATE_MCS_CCK_MSK
;
204 /* Set up antennas */
205 if (priv
->cfg
->bt_params
&&
206 priv
->cfg
->bt_params
->advanced_bt_coexist
&&
207 priv
->bt_full_concurrent
) {
208 /* operated as 1x1 in full concurrency mode */
209 priv
->mgmt_tx_ant
= iwl_toggle_tx_ant(priv
, priv
->mgmt_tx_ant
,
210 first_antenna(priv
->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
,
295 struct ieee80211_sta
*sta
,
298 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
299 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
300 struct iwl_station_priv
*sta_priv
= NULL
;
301 struct iwl_rxon_context
*ctx
= &priv
->contexts
[IWL_RXON_CTX_BSS
];
302 struct iwl_device_cmd
*dev_cmd
;
303 struct iwl_tx_cmd
*tx_cmd
;
306 u16 len
, seq_number
= 0;
307 u8 sta_id
, tid
= IWL_MAX_TID_COUNT
;
311 if (info
->control
.vif
)
312 ctx
= iwl_rxon_ctx_from_vif(info
->control
.vif
);
314 if (iwl_is_rfkill(priv
)) {
315 IWL_DEBUG_DROP(priv
, "Dropping - RF KILL\n");
316 goto drop_unlock_priv
;
319 fc
= hdr
->frame_control
;
321 #ifdef CONFIG_IWLWIFI_DEBUG
322 if (ieee80211_is_auth(fc
))
323 IWL_DEBUG_TX(priv
, "Sending AUTH frame\n");
324 else if (ieee80211_is_assoc_req(fc
))
325 IWL_DEBUG_TX(priv
, "Sending ASSOC frame\n");
326 else if (ieee80211_is_reassoc_req(fc
))
327 IWL_DEBUG_TX(priv
, "Sending REASSOC frame\n");
330 if (unlikely(ieee80211_is_probe_resp(fc
))) {
331 struct iwl_wipan_noa_data
*noa_data
=
332 rcu_dereference(priv
->noa_data
);
335 pskb_expand_head(skb
, 0, noa_data
->length
,
337 memcpy(skb_put(skb
, noa_data
->length
),
338 noa_data
->data
, noa_data
->length
);
339 hdr
= (struct ieee80211_hdr
*)skb
->data
;
343 hdr_len
= ieee80211_hdrlen(fc
);
345 /* For management frames use broadcast id to do not break aggregation */
346 if (!ieee80211_is_data(fc
))
347 sta_id
= ctx
->bcast_sta_id
;
349 /* Find index into station table for destination station */
350 sta_id
= iwl_sta_id_or_broadcast(ctx
, sta
);
351 if (sta_id
== IWL_INVALID_STATION
) {
352 IWL_DEBUG_DROP(priv
, "Dropping - INVALID STATION: %pM\n",
354 goto drop_unlock_priv
;
358 IWL_DEBUG_TX(priv
, "station Id %d\n", sta_id
);
361 sta_priv
= (void *)sta
->drv_priv
;
363 if (sta_priv
&& sta_priv
->asleep
&&
364 (info
->flags
& IEEE80211_TX_CTL_NO_PS_BUFFER
)) {
366 * This sends an asynchronous command to the device,
367 * but we can rely on it being processed before the
368 * next frame is processed -- and the next frame to
369 * this station is the one that will consume this
371 * For now set the counter to just 1 since we do not
374 * FIXME: If we get two non-bufferable frames one
375 * after the other, we might only send out one of
376 * them because this is racy.
378 iwl_sta_modify_sleep_tx_count(priv
, sta_id
, 1);
381 if (info
->flags
& IEEE80211_TX_CTL_AMPDU
)
384 dev_cmd
= iwl_trans_alloc_tx_cmd(priv
->trans
);
386 if (unlikely(!dev_cmd
))
387 goto drop_unlock_priv
;
389 memset(dev_cmd
, 0, sizeof(*dev_cmd
));
390 tx_cmd
= (struct iwl_tx_cmd
*) dev_cmd
->payload
;
392 /* Total # bytes to be transmitted */
394 tx_cmd
->len
= cpu_to_le16(len
);
396 if (info
->control
.hw_key
)
397 iwlagn_tx_cmd_build_hwcrypto(priv
, info
, tx_cmd
, skb
);
399 /* TODO need this for burst mode later on */
400 iwlagn_tx_cmd_build_basic(priv
, skb
, tx_cmd
, info
, hdr
, sta_id
);
402 iwlagn_tx_cmd_build_rate(priv
, tx_cmd
, info
, sta
, fc
);
404 memset(&info
->status
, 0, sizeof(info
->status
));
406 info
->driver_data
[0] = ctx
;
407 info
->driver_data
[1] = dev_cmd
;
408 /* From now on, we cannot access info->control */
410 spin_lock(&priv
->sta_lock
);
412 if (ieee80211_is_data_qos(fc
) && !ieee80211_is_qos_nullfunc(fc
)) {
414 struct iwl_tid_data
*tid_data
;
415 qc
= ieee80211_get_qos_ctl(hdr
);
416 tid
= qc
[0] & IEEE80211_QOS_CTL_TID_MASK
;
417 if (WARN_ON_ONCE(tid
>= IWL_MAX_TID_COUNT
))
418 goto drop_unlock_sta
;
419 tid_data
= &priv
->tid_data
[sta_id
][tid
];
421 /* aggregation is on for this <sta,tid> */
422 if (info
->flags
& IEEE80211_TX_CTL_AMPDU
&&
423 tid_data
->agg
.state
!= IWL_AGG_ON
) {
424 IWL_ERR(priv
, "TX_CTL_AMPDU while not in AGG:"
425 " Tx flags = 0x%08x, agg.state = %d",
426 info
->flags
, tid_data
->agg
.state
);
427 IWL_ERR(priv
, "sta_id = %d, tid = %d seq_num = %d",
428 sta_id
, tid
, SEQ_TO_SN(tid_data
->seq_number
));
429 goto drop_unlock_sta
;
432 /* We can receive packets from the stack in IWL_AGG_{ON,OFF}
433 * only. Check this here.
435 if (WARN_ONCE(tid_data
->agg
.state
!= IWL_AGG_ON
&&
436 tid_data
->agg
.state
!= IWL_AGG_OFF
,
437 "Tx while agg.state = %d", tid_data
->agg
.state
))
438 goto drop_unlock_sta
;
440 seq_number
= tid_data
->seq_number
;
441 seq_number
&= IEEE80211_SCTL_SEQ
;
442 hdr
->seq_ctrl
&= cpu_to_le16(IEEE80211_SCTL_FRAG
);
443 hdr
->seq_ctrl
|= cpu_to_le16(seq_number
);
447 /* Copy MAC header from skb into command buffer */
448 memcpy(tx_cmd
->hdr
, hdr
, hdr_len
);
451 txq_id
= priv
->tid_data
[sta_id
][tid
].agg
.txq_id
;
452 else if (info
->flags
& IEEE80211_TX_CTL_SEND_AFTER_DTIM
) {
454 * Send this frame after DTIM -- there's a special queue
455 * reserved for this for contexts that support AP mode.
457 txq_id
= ctx
->mcast_queue
;
460 * The microcode will clear the more data
461 * bit in the last frame it transmits.
463 hdr
->frame_control
|=
464 cpu_to_le16(IEEE80211_FCTL_MOREDATA
);
465 } else if (info
->flags
& IEEE80211_TX_CTL_TX_OFFCHAN
)
466 txq_id
= IWL_AUX_QUEUE
;
468 txq_id
= ctx
->ac_to_queue
[skb_get_queue_mapping(skb
)];
470 WARN_ON_ONCE(!is_agg
&& txq_id
!= info
->hw_queue
);
471 WARN_ON_ONCE(is_agg
&&
472 priv
->queue_to_mac80211
[txq_id
] != info
->hw_queue
);
474 if (iwl_trans_tx(priv
->trans
, skb
, dev_cmd
, txq_id
))
475 goto drop_unlock_sta
;
477 if (ieee80211_is_data_qos(fc
) && !ieee80211_is_qos_nullfunc(fc
) &&
478 !ieee80211_has_morefrags(fc
))
479 priv
->tid_data
[sta_id
][tid
].seq_number
= seq_number
;
481 spin_unlock(&priv
->sta_lock
);
484 * Avoid atomic ops if it isn't an associated client.
485 * Also, if this is a packet for aggregation, don't
486 * increase the counter because the ucode will stop
487 * aggregation queues when their respective station
490 if (sta_priv
&& sta_priv
->client
&& !is_agg
)
491 atomic_inc(&sta_priv
->pending_frames
);
493 if (info
->flags
& IEEE80211_TX_CTL_TX_OFFCHAN
)
494 iwl_scan_offchannel_skb(priv
);
500 iwl_trans_free_tx_cmd(priv
->trans
, dev_cmd
);
501 spin_unlock(&priv
->sta_lock
);
506 static int iwlagn_alloc_agg_txq(struct iwl_priv
*priv
, int mq
)
510 for (q
= IWLAGN_FIRST_AMPDU_QUEUE
;
511 q
< priv
->cfg
->base_params
->num_of_queues
; q
++) {
512 if (!test_and_set_bit(q
, priv
->agg_q_alloc
)) {
513 priv
->queue_to_mac80211
[q
] = mq
;
521 static void iwlagn_dealloc_agg_txq(struct iwl_priv
*priv
, int q
)
523 clear_bit(q
, priv
->agg_q_alloc
);
524 priv
->queue_to_mac80211
[q
] = IWL_INVALID_MAC80211_QUEUE
;
527 int iwlagn_tx_agg_stop(struct iwl_priv
*priv
, struct ieee80211_vif
*vif
,
528 struct ieee80211_sta
*sta
, u16 tid
)
530 struct iwl_tid_data
*tid_data
;
532 enum iwl_agg_state agg_state
;
534 sta_id
= iwl_sta_id(sta
);
536 if (sta_id
== IWL_INVALID_STATION
) {
537 IWL_ERR(priv
, "Invalid station for AGG tid %d\n", tid
);
541 spin_lock_bh(&priv
->sta_lock
);
543 tid_data
= &priv
->tid_data
[sta_id
][tid
];
544 txq_id
= priv
->tid_data
[sta_id
][tid
].agg
.txq_id
;
546 switch (priv
->tid_data
[sta_id
][tid
].agg
.state
) {
547 case IWL_EMPTYING_HW_QUEUE_ADDBA
:
549 * This can happen if the peer stops aggregation
550 * again before we've had a chance to drain the
551 * queue we selected previously, i.e. before the
552 * session was really started completely.
554 IWL_DEBUG_HT(priv
, "AGG stop before setup done\n");
556 case IWL_AGG_STARTING
:
558 * This can happen when the session is stopped before
559 * we receive ADDBA response
561 IWL_DEBUG_HT(priv
, "AGG stop before AGG became operational\n");
566 IWL_WARN(priv
, "Stopping AGG while state not ON "
567 "or starting for %d on %d (%d)\n", sta_id
, tid
,
568 priv
->tid_data
[sta_id
][tid
].agg
.state
);
569 spin_unlock_bh(&priv
->sta_lock
);
573 tid_data
->agg
.ssn
= SEQ_TO_SN(tid_data
->seq_number
);
575 /* There are still packets for this RA / TID in the HW */
576 if (!test_bit(txq_id
, priv
->agg_q_alloc
)) {
577 IWL_DEBUG_TX_QUEUES(priv
,
578 "stopping AGG on STA/TID %d/%d but hwq %d not used\n",
579 sta_id
, tid
, txq_id
);
580 } else if (tid_data
->agg
.ssn
!= tid_data
->next_reclaimed
) {
581 IWL_DEBUG_TX_QUEUES(priv
, "Can't proceed: ssn %d, "
584 tid_data
->next_reclaimed
);
585 priv
->tid_data
[sta_id
][tid
].agg
.state
=
586 IWL_EMPTYING_HW_QUEUE_DELBA
;
587 spin_unlock_bh(&priv
->sta_lock
);
591 IWL_DEBUG_TX_QUEUES(priv
, "Can proceed: ssn = next_recl = %d\n",
594 agg_state
= priv
->tid_data
[sta_id
][tid
].agg
.state
;
595 priv
->tid_data
[sta_id
][tid
].agg
.state
= IWL_AGG_OFF
;
597 spin_unlock_bh(&priv
->sta_lock
);
599 if (test_bit(txq_id
, priv
->agg_q_alloc
)) {
601 * If the transport didn't know that we wanted to start
602 * agreggation, don't tell it that we want to stop them.
603 * This can happen when we don't get the addBA response on
604 * time, or we hadn't time to drain the AC queues.
606 if (agg_state
== IWL_AGG_ON
)
607 iwl_trans_txq_disable(priv
->trans
, txq_id
);
609 IWL_DEBUG_TX_QUEUES(priv
, "Don't disable tx agg: %d\n",
611 iwlagn_dealloc_agg_txq(priv
, txq_id
);
614 ieee80211_stop_tx_ba_cb_irqsafe(vif
, sta
->addr
, tid
);
619 int iwlagn_tx_agg_start(struct iwl_priv
*priv
, struct ieee80211_vif
*vif
,
620 struct ieee80211_sta
*sta
, u16 tid
, u16
*ssn
)
622 struct iwl_rxon_context
*ctx
= iwl_rxon_ctx_from_vif(vif
);
623 struct iwl_tid_data
*tid_data
;
624 int sta_id
, txq_id
, ret
;
626 IWL_DEBUG_HT(priv
, "TX AGG request on ra = %pM tid = %d\n",
629 sta_id
= iwl_sta_id(sta
);
630 if (sta_id
== IWL_INVALID_STATION
) {
631 IWL_ERR(priv
, "Start AGG on invalid station\n");
634 if (unlikely(tid
>= IWL_MAX_TID_COUNT
))
637 if (priv
->tid_data
[sta_id
][tid
].agg
.state
!= IWL_AGG_OFF
) {
638 IWL_ERR(priv
, "Start AGG when state is not IWL_AGG_OFF !\n");
642 txq_id
= iwlagn_alloc_agg_txq(priv
, ctx
->ac_to_queue
[tid_to_ac
[tid
]]);
644 IWL_DEBUG_TX_QUEUES(priv
,
645 "No free aggregation queue for %pM/%d\n",
650 ret
= iwl_sta_tx_modify_enable_tid(priv
, sta_id
, tid
);
654 spin_lock_bh(&priv
->sta_lock
);
655 tid_data
= &priv
->tid_data
[sta_id
][tid
];
656 tid_data
->agg
.ssn
= SEQ_TO_SN(tid_data
->seq_number
);
657 tid_data
->agg
.txq_id
= txq_id
;
659 *ssn
= tid_data
->agg
.ssn
;
661 if (*ssn
== tid_data
->next_reclaimed
) {
662 IWL_DEBUG_TX_QUEUES(priv
, "Can proceed: ssn = next_recl = %d\n",
664 tid_data
->agg
.state
= IWL_AGG_STARTING
;
665 ieee80211_start_tx_ba_cb_irqsafe(vif
, sta
->addr
, tid
);
667 IWL_DEBUG_TX_QUEUES(priv
, "Can't proceed: ssn %d, "
668 "next_reclaimed = %d\n",
670 tid_data
->next_reclaimed
);
671 tid_data
->agg
.state
= IWL_EMPTYING_HW_QUEUE_ADDBA
;
673 spin_unlock_bh(&priv
->sta_lock
);
678 int iwlagn_tx_agg_oper(struct iwl_priv
*priv
, struct ieee80211_vif
*vif
,
679 struct ieee80211_sta
*sta
, u16 tid
, u8 buf_size
)
681 struct iwl_station_priv
*sta_priv
= (void *) sta
->drv_priv
;
682 struct iwl_rxon_context
*ctx
= iwl_rxon_ctx_from_vif(vif
);
686 buf_size
= min_t(int, buf_size
, LINK_QUAL_AGG_FRAME_LIMIT_DEF
);
688 spin_lock_bh(&priv
->sta_lock
);
689 ssn
= priv
->tid_data
[sta_priv
->sta_id
][tid
].agg
.ssn
;
690 q
= priv
->tid_data
[sta_priv
->sta_id
][tid
].agg
.txq_id
;
691 priv
->tid_data
[sta_priv
->sta_id
][tid
].agg
.state
= IWL_AGG_ON
;
692 spin_unlock_bh(&priv
->sta_lock
);
694 fifo
= ctx
->ac_to_fifo
[tid_to_ac
[tid
]];
696 iwl_trans_txq_enable(priv
->trans
, q
, fifo
, sta_priv
->sta_id
, tid
,
700 * If the limit is 0, then it wasn't initialised yet,
701 * use the default. We can do that since we take the
702 * minimum below, and we don't want to go above our
703 * default due to hardware restrictions.
705 if (sta_priv
->max_agg_bufsize
== 0)
706 sta_priv
->max_agg_bufsize
=
707 LINK_QUAL_AGG_FRAME_LIMIT_DEF
;
710 * Even though in theory the peer could have different
711 * aggregation reorder buffer sizes for different sessions,
712 * our ucode doesn't allow for that and has a global limit
713 * for each station. Therefore, use the minimum of all the
714 * aggregation sessions and our default value.
716 sta_priv
->max_agg_bufsize
=
717 min(sta_priv
->max_agg_bufsize
, buf_size
);
719 if (priv
->hw_params
.use_rts_for_aggregation
) {
721 * switch to RTS/CTS if it is the prefer protection
722 * method for HT traffic
725 sta_priv
->lq_sta
.lq
.general_params
.flags
|=
726 LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK
;
728 priv
->agg_tids_count
++;
729 IWL_DEBUG_HT(priv
, "priv->agg_tids_count = %u\n",
730 priv
->agg_tids_count
);
732 sta_priv
->lq_sta
.lq
.agg_params
.agg_frame_cnt_limit
=
733 sta_priv
->max_agg_bufsize
;
735 IWL_DEBUG_HT(priv
, "Tx aggregation enabled on ra = %pM tid = %d\n",
738 return iwl_send_lq_cmd(priv
, ctx
,
739 &sta_priv
->lq_sta
.lq
, CMD_ASYNC
, false);
742 static void iwlagn_check_ratid_empty(struct iwl_priv
*priv
, int sta_id
, u8 tid
)
744 struct iwl_tid_data
*tid_data
= &priv
->tid_data
[sta_id
][tid
];
745 enum iwl_rxon_context_id ctx
;
746 struct ieee80211_vif
*vif
;
749 lockdep_assert_held(&priv
->sta_lock
);
751 addr
= priv
->stations
[sta_id
].sta
.sta
.addr
;
752 ctx
= priv
->stations
[sta_id
].ctxid
;
753 vif
= priv
->contexts
[ctx
].vif
;
755 switch (priv
->tid_data
[sta_id
][tid
].agg
.state
) {
756 case IWL_EMPTYING_HW_QUEUE_DELBA
:
757 /* There are no packets for this RA / TID in the HW any more */
758 if (tid_data
->agg
.ssn
== tid_data
->next_reclaimed
) {
759 IWL_DEBUG_TX_QUEUES(priv
,
760 "Can continue DELBA flow ssn = next_recl ="
761 " %d", tid_data
->next_reclaimed
);
762 iwl_trans_txq_disable(priv
->trans
,
763 tid_data
->agg
.txq_id
);
764 iwlagn_dealloc_agg_txq(priv
, tid_data
->agg
.txq_id
);
765 tid_data
->agg
.state
= IWL_AGG_OFF
;
766 ieee80211_stop_tx_ba_cb_irqsafe(vif
, addr
, tid
);
769 case IWL_EMPTYING_HW_QUEUE_ADDBA
:
770 /* There are no packets for this RA / TID in the HW any more */
771 if (tid_data
->agg
.ssn
== tid_data
->next_reclaimed
) {
772 IWL_DEBUG_TX_QUEUES(priv
,
773 "Can continue ADDBA flow ssn = next_recl ="
774 " %d", tid_data
->next_reclaimed
);
775 tid_data
->agg
.state
= IWL_AGG_STARTING
;
776 ieee80211_start_tx_ba_cb_irqsafe(vif
, addr
, tid
);
784 static void iwlagn_non_agg_tx_status(struct iwl_priv
*priv
,
785 struct iwl_rxon_context
*ctx
,
788 struct ieee80211_sta
*sta
;
789 struct iwl_station_priv
*sta_priv
;
792 sta
= ieee80211_find_sta(ctx
->vif
, addr1
);
794 sta_priv
= (void *)sta
->drv_priv
;
795 /* avoid atomic ops if this isn't a client */
796 if (sta_priv
->client
&&
797 atomic_dec_return(&sta_priv
->pending_frames
) == 0)
798 ieee80211_sta_block_awake(priv
->hw
, sta
, false);
804 * translate ucode response to mac80211 tx status control values
806 static void iwlagn_hwrate_to_tx_control(struct iwl_priv
*priv
, u32 rate_n_flags
,
807 struct ieee80211_tx_info
*info
)
809 struct ieee80211_tx_rate
*r
= &info
->status
.rates
[0];
811 info
->status
.antenna
=
812 ((rate_n_flags
& RATE_MCS_ANT_ABC_MSK
) >> RATE_MCS_ANT_POS
);
813 if (rate_n_flags
& RATE_MCS_HT_MSK
)
814 r
->flags
|= IEEE80211_TX_RC_MCS
;
815 if (rate_n_flags
& RATE_MCS_GF_MSK
)
816 r
->flags
|= IEEE80211_TX_RC_GREEN_FIELD
;
817 if (rate_n_flags
& RATE_MCS_HT40_MSK
)
818 r
->flags
|= IEEE80211_TX_RC_40_MHZ_WIDTH
;
819 if (rate_n_flags
& RATE_MCS_DUP_MSK
)
820 r
->flags
|= IEEE80211_TX_RC_DUP_DATA
;
821 if (rate_n_flags
& RATE_MCS_SGI_MSK
)
822 r
->flags
|= IEEE80211_TX_RC_SHORT_GI
;
823 r
->idx
= iwlagn_hwrate_to_mac80211_idx(rate_n_flags
, info
->band
);
826 #ifdef CONFIG_IWLWIFI_DEBUG
827 const char *iwl_get_tx_fail_reason(u32 status
)
829 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
830 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
832 switch (status
& TX_STATUS_MSK
) {
833 case TX_STATUS_SUCCESS
:
835 TX_STATUS_POSTPONE(DELAY
);
836 TX_STATUS_POSTPONE(FEW_BYTES
);
837 TX_STATUS_POSTPONE(BT_PRIO
);
838 TX_STATUS_POSTPONE(QUIET_PERIOD
);
839 TX_STATUS_POSTPONE(CALC_TTAK
);
840 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY
);
841 TX_STATUS_FAIL(SHORT_LIMIT
);
842 TX_STATUS_FAIL(LONG_LIMIT
);
843 TX_STATUS_FAIL(FIFO_UNDERRUN
);
844 TX_STATUS_FAIL(DRAIN_FLOW
);
845 TX_STATUS_FAIL(RFKILL_FLUSH
);
846 TX_STATUS_FAIL(LIFE_EXPIRE
);
847 TX_STATUS_FAIL(DEST_PS
);
848 TX_STATUS_FAIL(HOST_ABORTED
);
849 TX_STATUS_FAIL(BT_RETRY
);
850 TX_STATUS_FAIL(STA_INVALID
);
851 TX_STATUS_FAIL(FRAG_DROPPED
);
852 TX_STATUS_FAIL(TID_DISABLE
);
853 TX_STATUS_FAIL(FIFO_FLUSHED
);
854 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL
);
855 TX_STATUS_FAIL(PASSIVE_NO_RX
);
856 TX_STATUS_FAIL(NO_BEACON_ON_RADAR
);
861 #undef TX_STATUS_FAIL
862 #undef TX_STATUS_POSTPONE
864 #endif /* CONFIG_IWLWIFI_DEBUG */
866 static void iwlagn_count_agg_tx_err_status(struct iwl_priv
*priv
, u16 status
)
868 status
&= AGG_TX_STATUS_MSK
;
871 case AGG_TX_STATE_UNDERRUN_MSK
:
872 priv
->reply_agg_tx_stats
.underrun
++;
874 case AGG_TX_STATE_BT_PRIO_MSK
:
875 priv
->reply_agg_tx_stats
.bt_prio
++;
877 case AGG_TX_STATE_FEW_BYTES_MSK
:
878 priv
->reply_agg_tx_stats
.few_bytes
++;
880 case AGG_TX_STATE_ABORT_MSK
:
881 priv
->reply_agg_tx_stats
.abort
++;
883 case AGG_TX_STATE_LAST_SENT_TTL_MSK
:
884 priv
->reply_agg_tx_stats
.last_sent_ttl
++;
886 case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK
:
887 priv
->reply_agg_tx_stats
.last_sent_try
++;
889 case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK
:
890 priv
->reply_agg_tx_stats
.last_sent_bt_kill
++;
892 case AGG_TX_STATE_SCD_QUERY_MSK
:
893 priv
->reply_agg_tx_stats
.scd_query
++;
895 case AGG_TX_STATE_TEST_BAD_CRC32_MSK
:
896 priv
->reply_agg_tx_stats
.bad_crc32
++;
898 case AGG_TX_STATE_RESPONSE_MSK
:
899 priv
->reply_agg_tx_stats
.response
++;
901 case AGG_TX_STATE_DUMP_TX_MSK
:
902 priv
->reply_agg_tx_stats
.dump_tx
++;
904 case AGG_TX_STATE_DELAY_TX_MSK
:
905 priv
->reply_agg_tx_stats
.delay_tx
++;
908 priv
->reply_agg_tx_stats
.unknown
++;
913 static void iwl_rx_reply_tx_agg(struct iwl_priv
*priv
,
914 struct iwlagn_tx_resp
*tx_resp
)
916 struct agg_tx_status
*frame_status
= &tx_resp
->status
;
917 int tid
= (tx_resp
->ra_tid
& IWLAGN_TX_RES_TID_MSK
) >>
918 IWLAGN_TX_RES_TID_POS
;
919 int sta_id
= (tx_resp
->ra_tid
& IWLAGN_TX_RES_RA_MSK
) >>
920 IWLAGN_TX_RES_RA_POS
;
921 struct iwl_ht_agg
*agg
= &priv
->tid_data
[sta_id
][tid
].agg
;
922 u32 status
= le16_to_cpu(tx_resp
->status
.status
);
925 WARN_ON(tid
== IWL_TID_NON_QOS
);
927 if (agg
->wait_for_ba
)
928 IWL_DEBUG_TX_REPLY(priv
,
929 "got tx response w/o block-ack\n");
931 agg
->rate_n_flags
= le32_to_cpu(tx_resp
->rate_n_flags
);
932 agg
->wait_for_ba
= (tx_resp
->frame_count
> 1);
935 * If the BT kill count is non-zero, we'll get this
936 * notification again.
938 if (tx_resp
->bt_kill_count
&& tx_resp
->frame_count
== 1 &&
939 priv
->cfg
->bt_params
&&
940 priv
->cfg
->bt_params
->advanced_bt_coexist
) {
941 IWL_DEBUG_COEX(priv
, "receive reply tx w/ bt_kill\n");
944 if (tx_resp
->frame_count
== 1)
947 /* Construct bit-map of pending frames within Tx window */
948 for (i
= 0; i
< tx_resp
->frame_count
; i
++) {
949 u16 fstatus
= le16_to_cpu(frame_status
[i
].status
);
951 if (status
& AGG_TX_STATUS_MSK
)
952 iwlagn_count_agg_tx_err_status(priv
, fstatus
);
954 if (status
& (AGG_TX_STATE_FEW_BYTES_MSK
|
955 AGG_TX_STATE_ABORT_MSK
))
958 IWL_DEBUG_TX_REPLY(priv
, "status %s (0x%08x), "
959 "try-count (0x%08x)\n",
960 iwl_get_agg_tx_fail_reason(fstatus
),
961 fstatus
& AGG_TX_STATUS_MSK
,
962 fstatus
& AGG_TX_TRY_MSK
);
966 #ifdef CONFIG_IWLWIFI_DEBUG
967 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
969 const char *iwl_get_agg_tx_fail_reason(u16 status
)
971 status
&= AGG_TX_STATUS_MSK
;
973 case AGG_TX_STATE_TRANSMITTED
:
975 AGG_TX_STATE_FAIL(UNDERRUN_MSK
);
976 AGG_TX_STATE_FAIL(BT_PRIO_MSK
);
977 AGG_TX_STATE_FAIL(FEW_BYTES_MSK
);
978 AGG_TX_STATE_FAIL(ABORT_MSK
);
979 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK
);
980 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK
);
981 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK
);
982 AGG_TX_STATE_FAIL(SCD_QUERY_MSK
);
983 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK
);
984 AGG_TX_STATE_FAIL(RESPONSE_MSK
);
985 AGG_TX_STATE_FAIL(DUMP_TX_MSK
);
986 AGG_TX_STATE_FAIL(DELAY_TX_MSK
);
991 #endif /* CONFIG_IWLWIFI_DEBUG */
993 static inline u32
iwlagn_get_scd_ssn(struct iwlagn_tx_resp
*tx_resp
)
995 return le32_to_cpup((__le32
*)&tx_resp
->status
+
996 tx_resp
->frame_count
) & MAX_SN
;
999 static void iwlagn_count_tx_err_status(struct iwl_priv
*priv
, u16 status
)
1001 status
&= TX_STATUS_MSK
;
1004 case TX_STATUS_POSTPONE_DELAY
:
1005 priv
->reply_tx_stats
.pp_delay
++;
1007 case TX_STATUS_POSTPONE_FEW_BYTES
:
1008 priv
->reply_tx_stats
.pp_few_bytes
++;
1010 case TX_STATUS_POSTPONE_BT_PRIO
:
1011 priv
->reply_tx_stats
.pp_bt_prio
++;
1013 case TX_STATUS_POSTPONE_QUIET_PERIOD
:
1014 priv
->reply_tx_stats
.pp_quiet_period
++;
1016 case TX_STATUS_POSTPONE_CALC_TTAK
:
1017 priv
->reply_tx_stats
.pp_calc_ttak
++;
1019 case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY
:
1020 priv
->reply_tx_stats
.int_crossed_retry
++;
1022 case TX_STATUS_FAIL_SHORT_LIMIT
:
1023 priv
->reply_tx_stats
.short_limit
++;
1025 case TX_STATUS_FAIL_LONG_LIMIT
:
1026 priv
->reply_tx_stats
.long_limit
++;
1028 case TX_STATUS_FAIL_FIFO_UNDERRUN
:
1029 priv
->reply_tx_stats
.fifo_underrun
++;
1031 case TX_STATUS_FAIL_DRAIN_FLOW
:
1032 priv
->reply_tx_stats
.drain_flow
++;
1034 case TX_STATUS_FAIL_RFKILL_FLUSH
:
1035 priv
->reply_tx_stats
.rfkill_flush
++;
1037 case TX_STATUS_FAIL_LIFE_EXPIRE
:
1038 priv
->reply_tx_stats
.life_expire
++;
1040 case TX_STATUS_FAIL_DEST_PS
:
1041 priv
->reply_tx_stats
.dest_ps
++;
1043 case TX_STATUS_FAIL_HOST_ABORTED
:
1044 priv
->reply_tx_stats
.host_abort
++;
1046 case TX_STATUS_FAIL_BT_RETRY
:
1047 priv
->reply_tx_stats
.bt_retry
++;
1049 case TX_STATUS_FAIL_STA_INVALID
:
1050 priv
->reply_tx_stats
.sta_invalid
++;
1052 case TX_STATUS_FAIL_FRAG_DROPPED
:
1053 priv
->reply_tx_stats
.frag_drop
++;
1055 case TX_STATUS_FAIL_TID_DISABLE
:
1056 priv
->reply_tx_stats
.tid_disable
++;
1058 case TX_STATUS_FAIL_FIFO_FLUSHED
:
1059 priv
->reply_tx_stats
.fifo_flush
++;
1061 case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL
:
1062 priv
->reply_tx_stats
.insuff_cf_poll
++;
1064 case TX_STATUS_FAIL_PASSIVE_NO_RX
:
1065 priv
->reply_tx_stats
.fail_hw_drop
++;
1067 case TX_STATUS_FAIL_NO_BEACON_ON_RADAR
:
1068 priv
->reply_tx_stats
.sta_color_mismatch
++;
1071 priv
->reply_tx_stats
.unknown
++;
1076 static void iwlagn_set_tx_status(struct iwl_priv
*priv
,
1077 struct ieee80211_tx_info
*info
,
1078 struct iwlagn_tx_resp
*tx_resp
,
1081 u16 status
= le16_to_cpu(tx_resp
->status
.status
);
1083 info
->status
.rates
[0].count
= tx_resp
->failure_frame
+ 1;
1085 info
->flags
&= ~IEEE80211_TX_CTL_AMPDU
;
1086 info
->flags
|= iwl_tx_status_to_mac80211(status
);
1087 iwlagn_hwrate_to_tx_control(priv
, le32_to_cpu(tx_resp
->rate_n_flags
),
1089 if (!iwl_is_tx_success(status
))
1090 iwlagn_count_tx_err_status(priv
, status
);
1093 static void iwl_check_abort_status(struct iwl_priv
*priv
,
1094 u8 frame_count
, u32 status
)
1096 if (frame_count
== 1 && status
== TX_STATUS_FAIL_RFKILL_FLUSH
) {
1097 IWL_ERR(priv
, "Tx flush command to flush out all frames\n");
1098 if (!test_bit(STATUS_EXIT_PENDING
, &priv
->status
))
1099 queue_work(priv
->workqueue
, &priv
->tx_flush
);
1103 static int iwl_reclaim(struct iwl_priv
*priv
, int sta_id
, int tid
,
1104 int txq_id
, int ssn
, struct sk_buff_head
*skbs
)
1106 if (unlikely(txq_id
>= IWLAGN_FIRST_AMPDU_QUEUE
&&
1107 tid
!= IWL_TID_NON_QOS
&&
1108 txq_id
!= priv
->tid_data
[sta_id
][tid
].agg
.txq_id
)) {
1110 * FIXME: this is a uCode bug which need to be addressed,
1111 * log the information and return for now.
1112 * Since it is can possibly happen very often and in order
1113 * not to fill the syslog, don't use IWL_ERR or IWL_WARN
1115 IWL_DEBUG_TX_QUEUES(priv
,
1116 "Bad queue mapping txq_id=%d, agg_txq[sta:%d,tid:%d]=%d\n",
1117 txq_id
, sta_id
, tid
,
1118 priv
->tid_data
[sta_id
][tid
].agg
.txq_id
);
1122 iwl_trans_reclaim(priv
->trans
, txq_id
, ssn
, skbs
);
1126 int iwlagn_rx_reply_tx(struct iwl_priv
*priv
, struct iwl_rx_cmd_buffer
*rxb
,
1127 struct iwl_device_cmd
*cmd
)
1129 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
1130 u16 sequence
= le16_to_cpu(pkt
->hdr
.sequence
);
1131 int txq_id
= SEQ_TO_QUEUE(sequence
);
1132 int cmd_index __maybe_unused
= SEQ_TO_INDEX(sequence
);
1133 struct iwlagn_tx_resp
*tx_resp
= (void *)pkt
->data
;
1134 struct ieee80211_hdr
*hdr
;
1135 u32 status
= le16_to_cpu(tx_resp
->status
.status
);
1136 u16 ssn
= iwlagn_get_scd_ssn(tx_resp
);
1140 struct ieee80211_tx_info
*info
;
1141 struct sk_buff_head skbs
;
1142 struct sk_buff
*skb
;
1143 struct iwl_rxon_context
*ctx
;
1144 bool is_agg
= (txq_id
>= IWLAGN_FIRST_AMPDU_QUEUE
);
1145 bool is_offchannel_skb
;
1147 tid
= (tx_resp
->ra_tid
& IWLAGN_TX_RES_TID_MSK
) >>
1148 IWLAGN_TX_RES_TID_POS
;
1149 sta_id
= (tx_resp
->ra_tid
& IWLAGN_TX_RES_RA_MSK
) >>
1150 IWLAGN_TX_RES_RA_POS
;
1152 spin_lock(&priv
->sta_lock
);
1155 iwl_rx_reply_tx_agg(priv
, tx_resp
);
1157 __skb_queue_head_init(&skbs
);
1159 is_offchannel_skb
= false;
1161 if (tx_resp
->frame_count
== 1) {
1162 u16 next_reclaimed
= le16_to_cpu(tx_resp
->seq_ctl
);
1163 next_reclaimed
= SEQ_TO_SN(next_reclaimed
+ 0x10);
1166 /* If this is an aggregation queue, we can rely on the
1167 * ssn since the wifi sequence number corresponds to
1168 * the index in the TFD ring (%256).
1169 * The seq_ctl is the sequence control of the packet
1170 * to which this Tx response relates. But if there is a
1171 * hole in the bitmap of the BA we received, this Tx
1172 * response may allow to reclaim the hole and all the
1173 * subsequent packets that were already acked.
1174 * In that case, seq_ctl != ssn, and the next packet
1175 * to be reclaimed will be ssn and not seq_ctl.
1177 next_reclaimed
= ssn
;
1180 if (tid
!= IWL_TID_NON_QOS
) {
1181 priv
->tid_data
[sta_id
][tid
].next_reclaimed
=
1183 IWL_DEBUG_TX_REPLY(priv
, "Next reclaimed packet:%d\n",
1187 /*we can free until ssn % q.n_bd not inclusive */
1188 WARN_ON_ONCE(iwl_reclaim(priv
, sta_id
, tid
,
1189 txq_id
, ssn
, &skbs
));
1190 iwlagn_check_ratid_empty(priv
, sta_id
, tid
);
1193 /* process frames */
1194 skb_queue_walk(&skbs
, skb
) {
1195 hdr
= (struct ieee80211_hdr
*)skb
->data
;
1197 if (!ieee80211_is_data_qos(hdr
->frame_control
))
1198 priv
->last_seq_ctl
= tx_resp
->seq_ctl
;
1200 info
= IEEE80211_SKB_CB(skb
);
1201 ctx
= info
->driver_data
[0];
1202 iwl_trans_free_tx_cmd(priv
->trans
,
1203 info
->driver_data
[1]);
1205 memset(&info
->status
, 0, sizeof(info
->status
));
1207 if (status
== TX_STATUS_FAIL_PASSIVE_NO_RX
&&
1208 iwl_is_associated_ctx(ctx
) && ctx
->vif
&&
1209 ctx
->vif
->type
== NL80211_IFTYPE_STATION
) {
1210 /* block and stop all queues */
1211 priv
->passive_no_rx
= true;
1212 IWL_DEBUG_TX_QUEUES(priv
, "stop all queues: "
1214 ieee80211_stop_queues(priv
->hw
);
1216 IWL_DEBUG_TX_REPLY(priv
,
1217 "TXQ %d status %s (0x%08x) "
1218 "rate_n_flags 0x%x retries %d\n",
1220 iwl_get_tx_fail_reason(status
),
1222 le32_to_cpu(tx_resp
->rate_n_flags
),
1223 tx_resp
->failure_frame
);
1225 IWL_DEBUG_TX_REPLY(priv
,
1226 "FrameCnt = %d, idx=%d\n",
1227 tx_resp
->frame_count
, cmd_index
);
1230 /* check if BAR is needed */
1231 if (is_agg
&& !iwl_is_tx_success(status
))
1232 info
->flags
|= IEEE80211_TX_STAT_AMPDU_NO_BACK
;
1233 iwlagn_set_tx_status(priv
, IEEE80211_SKB_CB(skb
),
1236 iwlagn_non_agg_tx_status(priv
, ctx
, hdr
->addr1
);
1239 (info
->flags
& IEEE80211_TX_CTL_TX_OFFCHAN
);
1243 WARN_ON(!is_agg
&& freed
!= 1);
1246 * An offchannel frame can be send only on the AUX queue, where
1247 * there is no aggregation (and reordering) so it only is single
1248 * skb is expected to be processed.
1250 WARN_ON(is_offchannel_skb
&& freed
!= 1);
1253 iwl_check_abort_status(priv
, tx_resp
->frame_count
, status
);
1254 spin_unlock(&priv
->sta_lock
);
1256 while (!skb_queue_empty(&skbs
)) {
1257 skb
= __skb_dequeue(&skbs
);
1258 ieee80211_tx_status(priv
->hw
, skb
);
1261 if (is_offchannel_skb
)
1262 iwl_scan_offchannel_skb_status(priv
);
1268 * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
1270 * Handles block-acknowledge notification from device, which reports success
1271 * of frames sent via aggregation.
1273 int iwlagn_rx_reply_compressed_ba(struct iwl_priv
*priv
,
1274 struct iwl_rx_cmd_buffer
*rxb
,
1275 struct iwl_device_cmd
*cmd
)
1277 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
1278 struct iwl_compressed_ba_resp
*ba_resp
= (void *)pkt
->data
;
1279 struct iwl_ht_agg
*agg
;
1280 struct sk_buff_head reclaimed_skbs
;
1281 struct ieee80211_tx_info
*info
;
1282 struct ieee80211_hdr
*hdr
;
1283 struct sk_buff
*skb
;
1288 /* "flow" corresponds to Tx queue */
1289 u16 scd_flow
= le16_to_cpu(ba_resp
->scd_flow
);
1291 /* "ssn" is start of block-ack Tx window, corresponds to index
1292 * (in Tx queue's circular buffer) of first TFD/frame in window */
1293 u16 ba_resp_scd_ssn
= le16_to_cpu(ba_resp
->scd_ssn
);
1295 if (scd_flow
>= priv
->cfg
->base_params
->num_of_queues
) {
1297 "BUG_ON scd_flow is bigger than number of queues\n");
1301 sta_id
= ba_resp
->sta_id
;
1303 agg
= &priv
->tid_data
[sta_id
][tid
].agg
;
1305 spin_lock(&priv
->sta_lock
);
1307 if (unlikely(!agg
->wait_for_ba
)) {
1308 if (unlikely(ba_resp
->bitmap
))
1309 IWL_ERR(priv
, "Received BA when not expected\n");
1310 spin_unlock(&priv
->sta_lock
);
1314 __skb_queue_head_init(&reclaimed_skbs
);
1316 /* Release all TFDs before the SSN, i.e. all TFDs in front of
1317 * block-ack window (we assume that they've been successfully
1318 * transmitted ... if not, it's too late anyway). */
1319 if (iwl_reclaim(priv
, sta_id
, tid
, scd_flow
,
1320 ba_resp_scd_ssn
, &reclaimed_skbs
)) {
1321 spin_unlock(&priv
->sta_lock
);
1325 IWL_DEBUG_TX_REPLY(priv
, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
1328 (u8
*) &ba_resp
->sta_addr_lo32
,
1330 IWL_DEBUG_TX_REPLY(priv
, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, "
1331 "scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1332 ba_resp
->tid
, le16_to_cpu(ba_resp
->seq_ctl
),
1333 (unsigned long long)le64_to_cpu(ba_resp
->bitmap
),
1334 scd_flow
, ba_resp_scd_ssn
, ba_resp
->txed
,
1335 ba_resp
->txed_2_done
);
1337 /* Mark that the expected block-ack response arrived */
1338 agg
->wait_for_ba
= false;
1340 /* Sanity check values reported by uCode */
1341 if (ba_resp
->txed_2_done
> ba_resp
->txed
) {
1342 IWL_DEBUG_TX_REPLY(priv
,
1343 "bogus sent(%d) and ack(%d) count\n",
1344 ba_resp
->txed
, ba_resp
->txed_2_done
);
1346 * set txed_2_done = txed,
1347 * so it won't impact rate scale
1349 ba_resp
->txed
= ba_resp
->txed_2_done
;
1352 priv
->tid_data
[sta_id
][tid
].next_reclaimed
= ba_resp_scd_ssn
;
1354 iwlagn_check_ratid_empty(priv
, sta_id
, tid
);
1357 skb_queue_walk(&reclaimed_skbs
, skb
) {
1358 hdr
= (struct ieee80211_hdr
*)skb
->data
;
1360 if (ieee80211_is_data_qos(hdr
->frame_control
))
1365 info
= IEEE80211_SKB_CB(skb
);
1366 iwl_trans_free_tx_cmd(priv
->trans
, info
->driver_data
[1]);
1369 /* this is the first skb we deliver in this batch */
1370 /* put the rate scaling data there */
1371 info
= IEEE80211_SKB_CB(skb
);
1372 memset(&info
->status
, 0, sizeof(info
->status
));
1373 info
->flags
|= IEEE80211_TX_STAT_ACK
;
1374 info
->flags
|= IEEE80211_TX_STAT_AMPDU
;
1375 info
->status
.ampdu_ack_len
= ba_resp
->txed_2_done
;
1376 info
->status
.ampdu_len
= ba_resp
->txed
;
1377 iwlagn_hwrate_to_tx_control(priv
, agg
->rate_n_flags
,
1382 spin_unlock(&priv
->sta_lock
);
1384 while (!skb_queue_empty(&reclaimed_skbs
)) {
1385 skb
= __skb_dequeue(&reclaimed_skbs
);
1386 ieee80211_tx_status(priv
->hw
, skb
);