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>
38 #include "iwl-agn-hw.h"
40 #include "iwl-trans.h"
42 static const u8 tid_to_ac
[] = {
53 static void iwlagn_tx_cmd_protection(struct iwl_priv
*priv
,
54 struct ieee80211_tx_info
*info
,
55 __le16 fc
, __le32
*tx_flags
)
57 if (info
->control
.rates
[0].flags
& IEEE80211_TX_RC_USE_RTS_CTS
||
58 info
->control
.rates
[0].flags
& IEEE80211_TX_RC_USE_CTS_PROTECT
||
59 info
->flags
& IEEE80211_TX_CTL_AMPDU
)
60 *tx_flags
|= TX_CMD_FLG_PROT_REQUIRE_MSK
;
64 * handle build REPLY_TX command notification.
66 static void iwlagn_tx_cmd_build_basic(struct iwl_priv
*priv
,
68 struct iwl_tx_cmd
*tx_cmd
,
69 struct ieee80211_tx_info
*info
,
70 struct ieee80211_hdr
*hdr
, u8 sta_id
)
72 __le16 fc
= hdr
->frame_control
;
73 __le32 tx_flags
= tx_cmd
->tx_flags
;
75 tx_cmd
->stop_time
.life_time
= TX_CMD_LIFE_TIME_INFINITE
;
77 if (!(info
->flags
& IEEE80211_TX_CTL_NO_ACK
))
78 tx_flags
|= TX_CMD_FLG_ACK_MSK
;
80 tx_flags
&= ~TX_CMD_FLG_ACK_MSK
;
82 if (ieee80211_is_probe_resp(fc
))
83 tx_flags
|= TX_CMD_FLG_TSF_MSK
;
84 else if (ieee80211_is_back_req(fc
))
85 tx_flags
|= TX_CMD_FLG_ACK_MSK
| TX_CMD_FLG_IMM_BA_RSP_MASK
;
86 else if (info
->band
== IEEE80211_BAND_2GHZ
&&
87 priv
->cfg
->bt_params
&&
88 priv
->cfg
->bt_params
->advanced_bt_coexist
&&
89 (ieee80211_is_auth(fc
) || ieee80211_is_assoc_req(fc
) ||
90 ieee80211_is_reassoc_req(fc
) ||
91 skb
->protocol
== cpu_to_be16(ETH_P_PAE
)))
92 tx_flags
|= TX_CMD_FLG_IGNORE_BT
;
95 tx_cmd
->sta_id
= sta_id
;
96 if (ieee80211_has_morefrags(fc
))
97 tx_flags
|= TX_CMD_FLG_MORE_FRAG_MSK
;
99 if (ieee80211_is_data_qos(fc
)) {
100 u8
*qc
= ieee80211_get_qos_ctl(hdr
);
101 tx_cmd
->tid_tspec
= qc
[0] & 0xf;
102 tx_flags
&= ~TX_CMD_FLG_SEQ_CTL_MSK
;
104 tx_cmd
->tid_tspec
= IWL_TID_NON_QOS
;
105 if (info
->flags
& IEEE80211_TX_CTL_ASSIGN_SEQ
)
106 tx_flags
|= TX_CMD_FLG_SEQ_CTL_MSK
;
108 tx_flags
&= ~TX_CMD_FLG_SEQ_CTL_MSK
;
111 iwlagn_tx_cmd_protection(priv
, info
, fc
, &tx_flags
);
113 tx_flags
&= ~(TX_CMD_FLG_ANT_SEL_MSK
);
114 if (ieee80211_is_mgmt(fc
)) {
115 if (ieee80211_is_assoc_req(fc
) || ieee80211_is_reassoc_req(fc
))
116 tx_cmd
->timeout
.pm_frame_timeout
= cpu_to_le16(3);
118 tx_cmd
->timeout
.pm_frame_timeout
= cpu_to_le16(2);
120 tx_cmd
->timeout
.pm_frame_timeout
= 0;
123 tx_cmd
->driver_txop
= 0;
124 tx_cmd
->tx_flags
= tx_flags
;
125 tx_cmd
->next_frame_len
= 0;
128 static void iwlagn_tx_cmd_build_rate(struct iwl_priv
*priv
,
129 struct iwl_tx_cmd
*tx_cmd
,
130 struct ieee80211_tx_info
*info
,
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(&priv
->bands
[info
->band
],
192 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
193 if (info
->band
== IEEE80211_BAND_5GHZ
)
194 rate_idx
+= IWL_FIRST_OFDM_RATE
;
195 /* Get PLCP rate for tx_cmd->rate_n_flags */
196 rate_plcp
= iwl_rates
[rate_idx
].plcp
;
197 /* Zero out flags for this packet */
200 /* Set CCK flag as needed */
201 if ((rate_idx
>= IWL_FIRST_CCK_RATE
) && (rate_idx
<= IWL_LAST_CCK_RATE
))
202 rate_flags
|= RATE_MCS_CCK_MSK
;
204 /* Set up antennas */
205 if (priv
->cfg
->bt_params
&&
206 priv
->cfg
->bt_params
->advanced_bt_coexist
&&
207 priv
->bt_full_concurrent
) {
208 /* operated as 1x1 in full concurrency mode */
209 priv
->mgmt_tx_ant
= iwl_toggle_tx_ant(priv
, priv
->mgmt_tx_ant
,
210 first_antenna(priv
->hw_params
.valid_tx_ant
));
212 priv
->mgmt_tx_ant
= iwl_toggle_tx_ant(priv
, priv
->mgmt_tx_ant
,
213 priv
->hw_params
.valid_tx_ant
);
214 rate_flags
|= iwl_ant_idx_to_flags(priv
->mgmt_tx_ant
);
216 /* Set the rate in the TX cmd */
217 tx_cmd
->rate_n_flags
= iwl_hw_set_rate_n_flags(rate_plcp
, rate_flags
);
220 static void iwlagn_tx_cmd_build_hwcrypto(struct iwl_priv
*priv
,
221 struct ieee80211_tx_info
*info
,
222 struct iwl_tx_cmd
*tx_cmd
,
223 struct sk_buff
*skb_frag
)
225 struct ieee80211_key_conf
*keyconf
= info
->control
.hw_key
;
227 switch (keyconf
->cipher
) {
228 case WLAN_CIPHER_SUITE_CCMP
:
229 tx_cmd
->sec_ctl
= TX_CMD_SEC_CCM
;
230 memcpy(tx_cmd
->key
, keyconf
->key
, keyconf
->keylen
);
231 if (info
->flags
& IEEE80211_TX_CTL_AMPDU
)
232 tx_cmd
->tx_flags
|= TX_CMD_FLG_AGG_CCMP_MSK
;
233 IWL_DEBUG_TX(priv
, "tx_cmd with AES hwcrypto\n");
236 case WLAN_CIPHER_SUITE_TKIP
:
237 tx_cmd
->sec_ctl
= TX_CMD_SEC_TKIP
;
238 ieee80211_get_tkip_p2k(keyconf
, skb_frag
, tx_cmd
->key
);
239 IWL_DEBUG_TX(priv
, "tx_cmd with tkip hwcrypto\n");
242 case WLAN_CIPHER_SUITE_WEP104
:
243 tx_cmd
->sec_ctl
|= TX_CMD_SEC_KEY128
;
245 case WLAN_CIPHER_SUITE_WEP40
:
246 tx_cmd
->sec_ctl
|= (TX_CMD_SEC_WEP
|
247 (keyconf
->keyidx
& TX_CMD_SEC_MSK
) << TX_CMD_SEC_SHIFT
);
249 memcpy(&tx_cmd
->key
[3], keyconf
->key
, keyconf
->keylen
);
251 IWL_DEBUG_TX(priv
, "Configuring packet for WEP encryption "
252 "with key %d\n", keyconf
->keyidx
);
256 IWL_ERR(priv
, "Unknown encode cipher %x\n", keyconf
->cipher
);
262 * iwl_sta_id_or_broadcast - return sta_id or broadcast sta
263 * @context: the current context
264 * @sta: mac80211 station
266 * In certain circumstances mac80211 passes a station pointer
267 * that may be %NULL, for example during TX or key setup. In
268 * that case, we need to use the broadcast station, so this
269 * inline wraps that pattern.
271 static int iwl_sta_id_or_broadcast(struct iwl_rxon_context
*context
,
272 struct ieee80211_sta
*sta
)
277 return context
->bcast_sta_id
;
279 sta_id
= iwl_sta_id(sta
);
282 * mac80211 should not be passing a partially
283 * initialised station!
285 WARN_ON(sta_id
== IWL_INVALID_STATION
);
291 * start REPLY_TX command process
293 int iwlagn_tx_skb(struct iwl_priv
*priv
, struct sk_buff
*skb
)
295 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
296 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
297 struct iwl_station_priv
*sta_priv
= NULL
;
298 struct iwl_rxon_context
*ctx
= &priv
->contexts
[IWL_RXON_CTX_BSS
];
299 struct iwl_device_cmd
*dev_cmd
= NULL
;
300 struct iwl_tx_cmd
*tx_cmd
;
303 u16 len
, seq_number
= 0;
304 u8 sta_id
, tid
= IWL_MAX_TID_COUNT
;
308 if (info
->control
.vif
)
309 ctx
= iwl_rxon_ctx_from_vif(info
->control
.vif
);
311 if (iwl_is_rfkill(priv
)) {
312 IWL_DEBUG_DROP(priv
, "Dropping - RF KILL\n");
313 goto drop_unlock_priv
;
316 fc
= hdr
->frame_control
;
318 #ifdef CONFIG_IWLWIFI_DEBUG
319 if (ieee80211_is_auth(fc
))
320 IWL_DEBUG_TX(priv
, "Sending AUTH frame\n");
321 else if (ieee80211_is_assoc_req(fc
))
322 IWL_DEBUG_TX(priv
, "Sending ASSOC frame\n");
323 else if (ieee80211_is_reassoc_req(fc
))
324 IWL_DEBUG_TX(priv
, "Sending REASSOC frame\n");
327 if (unlikely(ieee80211_is_probe_resp(fc
))) {
328 struct iwl_wipan_noa_data
*noa_data
=
329 rcu_dereference(priv
->noa_data
);
332 pskb_expand_head(skb
, 0, noa_data
->length
,
334 memcpy(skb_put(skb
, noa_data
->length
),
335 noa_data
->data
, noa_data
->length
);
336 hdr
= (struct ieee80211_hdr
*)skb
->data
;
340 hdr_len
= ieee80211_hdrlen(fc
);
342 /* For management frames use broadcast id to do not break aggregation */
343 if (!ieee80211_is_data(fc
))
344 sta_id
= ctx
->bcast_sta_id
;
346 /* Find index into station table for destination station */
347 sta_id
= iwl_sta_id_or_broadcast(ctx
, info
->control
.sta
);
348 if (sta_id
== IWL_INVALID_STATION
) {
349 IWL_DEBUG_DROP(priv
, "Dropping - INVALID STATION: %pM\n",
351 goto drop_unlock_priv
;
355 IWL_DEBUG_TX(priv
, "station Id %d\n", sta_id
);
357 if (info
->control
.sta
)
358 sta_priv
= (void *)info
->control
.sta
->drv_priv
;
360 if (sta_priv
&& sta_priv
->asleep
&&
361 (info
->flags
& IEEE80211_TX_CTL_NO_PS_BUFFER
)) {
363 * This sends an asynchronous command to the device,
364 * but we can rely on it being processed before the
365 * next frame is processed -- and the next frame to
366 * this station is the one that will consume this
368 * For now set the counter to just 1 since we do not
371 * FIXME: If we get two non-bufferable frames one
372 * after the other, we might only send out one of
373 * them because this is racy.
375 iwl_sta_modify_sleep_tx_count(priv
, sta_id
, 1);
378 if (info
->flags
& IEEE80211_TX_CTL_AMPDU
)
381 dev_cmd
= kmem_cache_alloc(iwl_tx_cmd_pool
, GFP_ATOMIC
);
383 if (unlikely(!dev_cmd
))
384 goto drop_unlock_priv
;
386 memset(dev_cmd
, 0, sizeof(*dev_cmd
));
387 tx_cmd
= (struct iwl_tx_cmd
*) dev_cmd
->payload
;
389 /* Total # bytes to be transmitted */
391 tx_cmd
->len
= cpu_to_le16(len
);
393 if (info
->control
.hw_key
)
394 iwlagn_tx_cmd_build_hwcrypto(priv
, info
, tx_cmd
, skb
);
396 /* TODO need this for burst mode later on */
397 iwlagn_tx_cmd_build_basic(priv
, skb
, tx_cmd
, info
, hdr
, sta_id
);
399 iwlagn_tx_cmd_build_rate(priv
, tx_cmd
, info
, fc
);
401 memset(&info
->status
, 0, sizeof(info
->status
));
403 info
->driver_data
[0] = ctx
;
404 info
->driver_data
[1] = dev_cmd
;
406 spin_lock(&priv
->sta_lock
);
408 if (ieee80211_is_data_qos(fc
) && !ieee80211_is_qos_nullfunc(fc
)) {
410 struct iwl_tid_data
*tid_data
;
411 qc
= ieee80211_get_qos_ctl(hdr
);
412 tid
= qc
[0] & IEEE80211_QOS_CTL_TID_MASK
;
413 if (WARN_ON_ONCE(tid
>= IWL_MAX_TID_COUNT
))
414 goto drop_unlock_sta
;
415 tid_data
= &priv
->tid_data
[sta_id
][tid
];
417 /* aggregation is on for this <sta,tid> */
418 if (info
->flags
& IEEE80211_TX_CTL_AMPDU
&&
419 tid_data
->agg
.state
!= IWL_AGG_ON
) {
420 IWL_ERR(priv
, "TX_CTL_AMPDU while not in AGG:"
421 " Tx flags = 0x%08x, agg.state = %d",
422 info
->flags
, tid_data
->agg
.state
);
423 IWL_ERR(priv
, "sta_id = %d, tid = %d seq_num = %d",
424 sta_id
, tid
, SEQ_TO_SN(tid_data
->seq_number
));
425 goto drop_unlock_sta
;
428 /* We can receive packets from the stack in IWL_AGG_{ON,OFF}
429 * only. Check this here.
431 if (WARN_ONCE(tid_data
->agg
.state
!= IWL_AGG_ON
&&
432 tid_data
->agg
.state
!= IWL_AGG_OFF
,
433 "Tx while agg.state = %d", tid_data
->agg
.state
))
434 goto drop_unlock_sta
;
436 seq_number
= tid_data
->seq_number
;
437 seq_number
&= IEEE80211_SCTL_SEQ
;
438 hdr
->seq_ctrl
&= cpu_to_le16(IEEE80211_SCTL_FRAG
);
439 hdr
->seq_ctrl
|= cpu_to_le16(seq_number
);
443 /* Copy MAC header from skb into command buffer */
444 memcpy(tx_cmd
->hdr
, hdr
, hdr_len
);
447 txq_id
= priv
->tid_data
[sta_id
][tid
].agg
.txq_id
;
448 else if (info
->flags
& IEEE80211_TX_CTL_SEND_AFTER_DTIM
) {
450 * Send this frame after DTIM -- there's a special queue
451 * reserved for this for contexts that support AP mode.
453 txq_id
= ctx
->mcast_queue
;
456 * The microcode will clear the more data
457 * bit in the last frame it transmits.
459 hdr
->frame_control
|=
460 cpu_to_le16(IEEE80211_FCTL_MOREDATA
);
461 } else if (info
->flags
& IEEE80211_TX_CTL_TX_OFFCHAN
)
462 txq_id
= IWL_AUX_QUEUE
;
464 txq_id
= ctx
->ac_to_queue
[skb_get_queue_mapping(skb
)];
466 WARN_ON_ONCE(!is_agg
&& txq_id
!= info
->hw_queue
);
467 WARN_ON_ONCE(is_agg
&&
468 priv
->queue_to_mac80211
[txq_id
] != info
->hw_queue
);
470 if (iwl_trans_tx(priv
->trans
, skb
, dev_cmd
, txq_id
))
471 goto drop_unlock_sta
;
473 if (ieee80211_is_data_qos(fc
) && !ieee80211_is_qos_nullfunc(fc
) &&
474 !ieee80211_has_morefrags(fc
))
475 priv
->tid_data
[sta_id
][tid
].seq_number
= seq_number
;
477 spin_unlock(&priv
->sta_lock
);
480 * Avoid atomic ops if it isn't an associated client.
481 * Also, if this is a packet for aggregation, don't
482 * increase the counter because the ucode will stop
483 * aggregation queues when their respective station
486 if (sta_priv
&& sta_priv
->client
&& !is_agg
)
487 atomic_inc(&sta_priv
->pending_frames
);
493 kmem_cache_free(iwl_tx_cmd_pool
, dev_cmd
);
494 spin_unlock(&priv
->sta_lock
);
499 static int iwlagn_alloc_agg_txq(struct iwl_priv
*priv
, int mq
)
503 for (q
= IWLAGN_FIRST_AMPDU_QUEUE
;
504 q
< priv
->cfg
->base_params
->num_of_queues
; q
++) {
505 if (!test_and_set_bit(q
, priv
->agg_q_alloc
)) {
506 priv
->queue_to_mac80211
[q
] = mq
;
514 static void iwlagn_dealloc_agg_txq(struct iwl_priv
*priv
, int q
)
516 clear_bit(q
, priv
->agg_q_alloc
);
517 priv
->queue_to_mac80211
[q
] = IWL_INVALID_MAC80211_QUEUE
;
520 int iwlagn_tx_agg_stop(struct iwl_priv
*priv
, struct ieee80211_vif
*vif
,
521 struct ieee80211_sta
*sta
, u16 tid
)
523 struct iwl_tid_data
*tid_data
;
525 enum iwl_agg_state agg_state
;
527 sta_id
= iwl_sta_id(sta
);
529 if (sta_id
== IWL_INVALID_STATION
) {
530 IWL_ERR(priv
, "Invalid station for AGG tid %d\n", tid
);
534 spin_lock_bh(&priv
->sta_lock
);
536 tid_data
= &priv
->tid_data
[sta_id
][tid
];
537 txq_id
= priv
->tid_data
[sta_id
][tid
].agg
.txq_id
;
539 switch (priv
->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");
549 case IWL_AGG_STARTING
:
551 * This can happen when the session is stopped before
552 * we receive ADDBA response
554 IWL_DEBUG_HT(priv
, "AGG stop before AGG became operational\n");
559 IWL_WARN(priv
, "Stopping AGG while state not ON "
560 "or starting for %d on %d (%d)\n", sta_id
, tid
,
561 priv
->tid_data
[sta_id
][tid
].agg
.state
);
562 spin_unlock_bh(&priv
->sta_lock
);
566 tid_data
->agg
.ssn
= SEQ_TO_SN(tid_data
->seq_number
);
568 /* There are still packets for this RA / TID in the HW */
569 if (!test_bit(txq_id
, priv
->agg_q_alloc
)) {
570 IWL_DEBUG_TX_QUEUES(priv
,
571 "stopping AGG on STA/TID %d/%d but hwq %d not used\n",
572 sta_id
, tid
, txq_id
);
573 } else if (tid_data
->agg
.ssn
!= tid_data
->next_reclaimed
) {
574 IWL_DEBUG_TX_QUEUES(priv
, "Can't proceed: ssn %d, "
577 tid_data
->next_reclaimed
);
578 priv
->tid_data
[sta_id
][tid
].agg
.state
=
579 IWL_EMPTYING_HW_QUEUE_DELBA
;
580 spin_unlock_bh(&priv
->sta_lock
);
584 IWL_DEBUG_TX_QUEUES(priv
, "Can proceed: ssn = next_recl = %d\n",
587 agg_state
= priv
->tid_data
[sta_id
][tid
].agg
.state
;
588 priv
->tid_data
[sta_id
][tid
].agg
.state
= IWL_AGG_OFF
;
590 spin_unlock_bh(&priv
->sta_lock
);
592 if (test_bit(txq_id
, priv
->agg_q_alloc
)) {
594 * If the transport didn't know that we wanted to start
595 * agreggation, don't tell it that we want to stop them.
596 * This can happen when we don't get the addBA response on
597 * time, or we hadn't time to drain the AC queues.
599 if (agg_state
== IWL_AGG_ON
)
600 iwl_trans_tx_agg_disable(priv
->trans
, txq_id
);
602 IWL_DEBUG_TX_QUEUES(priv
, "Don't disable tx agg: %d\n",
604 iwlagn_dealloc_agg_txq(priv
, txq_id
);
607 ieee80211_stop_tx_ba_cb_irqsafe(vif
, sta
->addr
, tid
);
612 int iwlagn_tx_agg_start(struct iwl_priv
*priv
, struct ieee80211_vif
*vif
,
613 struct ieee80211_sta
*sta
, u16 tid
, u16
*ssn
)
615 struct iwl_rxon_context
*ctx
= iwl_rxon_ctx_from_vif(vif
);
616 struct iwl_tid_data
*tid_data
;
617 int sta_id
, txq_id
, ret
;
619 IWL_DEBUG_HT(priv
, "TX AGG request on ra = %pM tid = %d\n",
622 sta_id
= iwl_sta_id(sta
);
623 if (sta_id
== IWL_INVALID_STATION
) {
624 IWL_ERR(priv
, "Start AGG on invalid station\n");
627 if (unlikely(tid
>= IWL_MAX_TID_COUNT
))
630 if (priv
->tid_data
[sta_id
][tid
].agg
.state
!= IWL_AGG_OFF
) {
631 IWL_ERR(priv
, "Start AGG when state is not IWL_AGG_OFF !\n");
635 txq_id
= iwlagn_alloc_agg_txq(priv
, ctx
->ac_to_queue
[tid_to_ac
[tid
]]);
637 IWL_DEBUG_TX_QUEUES(priv
,
638 "No free aggregation queue for %pM/%d\n",
643 ret
= iwl_sta_tx_modify_enable_tid(priv
, sta_id
, tid
);
647 spin_lock_bh(&priv
->sta_lock
);
648 tid_data
= &priv
->tid_data
[sta_id
][tid
];
649 tid_data
->agg
.ssn
= SEQ_TO_SN(tid_data
->seq_number
);
650 tid_data
->agg
.txq_id
= txq_id
;
652 *ssn
= tid_data
->agg
.ssn
;
654 if (*ssn
== tid_data
->next_reclaimed
) {
655 IWL_DEBUG_TX_QUEUES(priv
, "Can proceed: ssn = next_recl = %d\n",
657 tid_data
->agg
.state
= IWL_AGG_STARTING
;
658 ieee80211_start_tx_ba_cb_irqsafe(vif
, sta
->addr
, tid
);
660 IWL_DEBUG_TX_QUEUES(priv
, "Can't proceed: ssn %d, "
661 "next_reclaimed = %d\n",
663 tid_data
->next_reclaimed
);
664 tid_data
->agg
.state
= IWL_EMPTYING_HW_QUEUE_ADDBA
;
666 spin_unlock_bh(&priv
->sta_lock
);
671 int iwlagn_tx_agg_oper(struct iwl_priv
*priv
, struct ieee80211_vif
*vif
,
672 struct ieee80211_sta
*sta
, u16 tid
, u8 buf_size
)
674 struct iwl_station_priv
*sta_priv
= (void *) sta
->drv_priv
;
675 struct iwl_rxon_context
*ctx
= iwl_rxon_ctx_from_vif(vif
);
679 buf_size
= min_t(int, buf_size
, LINK_QUAL_AGG_FRAME_LIMIT_DEF
);
681 spin_lock_bh(&priv
->sta_lock
);
682 ssn
= priv
->tid_data
[sta_priv
->sta_id
][tid
].agg
.ssn
;
683 q
= priv
->tid_data
[sta_priv
->sta_id
][tid
].agg
.txq_id
;
684 priv
->tid_data
[sta_priv
->sta_id
][tid
].agg
.state
= IWL_AGG_ON
;
685 spin_unlock_bh(&priv
->sta_lock
);
687 fifo
= ctx
->ac_to_fifo
[tid_to_ac
[tid
]];
689 iwl_trans_tx_agg_setup(priv
->trans
, q
, fifo
,
690 sta_priv
->sta_id
, tid
,
694 * If the limit is 0, then it wasn't initialised yet,
695 * use the default. We can do that since we take the
696 * minimum below, and we don't want to go above our
697 * default due to hardware restrictions.
699 if (sta_priv
->max_agg_bufsize
== 0)
700 sta_priv
->max_agg_bufsize
=
701 LINK_QUAL_AGG_FRAME_LIMIT_DEF
;
704 * Even though in theory the peer could have different
705 * aggregation reorder buffer sizes for different sessions,
706 * our ucode doesn't allow for that and has a global limit
707 * for each station. Therefore, use the minimum of all the
708 * aggregation sessions and our default value.
710 sta_priv
->max_agg_bufsize
=
711 min(sta_priv
->max_agg_bufsize
, buf_size
);
713 if (priv
->hw_params
.use_rts_for_aggregation
) {
715 * switch to RTS/CTS if it is the prefer protection
716 * method for HT traffic
719 sta_priv
->lq_sta
.lq
.general_params
.flags
|=
720 LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK
;
722 priv
->agg_tids_count
++;
723 IWL_DEBUG_HT(priv
, "priv->agg_tids_count = %u\n",
724 priv
->agg_tids_count
);
726 sta_priv
->lq_sta
.lq
.agg_params
.agg_frame_cnt_limit
=
727 sta_priv
->max_agg_bufsize
;
729 IWL_DEBUG_HT(priv
, "Tx aggregation enabled on ra = %pM tid = %d\n",
732 return iwl_send_lq_cmd(priv
, ctx
,
733 &sta_priv
->lq_sta
.lq
, CMD_ASYNC
, false);
736 static void iwlagn_check_ratid_empty(struct iwl_priv
*priv
, int sta_id
, u8 tid
)
738 struct iwl_tid_data
*tid_data
= &priv
->tid_data
[sta_id
][tid
];
739 enum iwl_rxon_context_id ctx
;
740 struct ieee80211_vif
*vif
;
743 lockdep_assert_held(&priv
->sta_lock
);
745 addr
= priv
->stations
[sta_id
].sta
.sta
.addr
;
746 ctx
= priv
->stations
[sta_id
].ctxid
;
747 vif
= priv
->contexts
[ctx
].vif
;
749 switch (priv
->tid_data
[sta_id
][tid
].agg
.state
) {
750 case IWL_EMPTYING_HW_QUEUE_DELBA
:
751 /* There are no packets for this RA / TID in the HW any more */
752 if (tid_data
->agg
.ssn
== tid_data
->next_reclaimed
) {
753 IWL_DEBUG_TX_QUEUES(priv
,
754 "Can continue DELBA flow ssn = next_recl ="
755 " %d", tid_data
->next_reclaimed
);
756 iwl_trans_tx_agg_disable(priv
->trans
,
757 tid_data
->agg
.txq_id
);
758 iwlagn_dealloc_agg_txq(priv
, tid_data
->agg
.txq_id
);
759 tid_data
->agg
.state
= IWL_AGG_OFF
;
760 ieee80211_stop_tx_ba_cb_irqsafe(vif
, addr
, tid
);
763 case IWL_EMPTYING_HW_QUEUE_ADDBA
:
764 /* There are no packets for this RA / TID in the HW any more */
765 if (tid_data
->agg
.ssn
== tid_data
->next_reclaimed
) {
766 IWL_DEBUG_TX_QUEUES(priv
,
767 "Can continue ADDBA flow ssn = next_recl ="
768 " %d", tid_data
->next_reclaimed
);
769 tid_data
->agg
.state
= IWL_AGG_STARTING
;
770 ieee80211_start_tx_ba_cb_irqsafe(vif
, addr
, tid
);
778 static void iwlagn_non_agg_tx_status(struct iwl_priv
*priv
,
779 struct iwl_rxon_context
*ctx
,
782 struct ieee80211_sta
*sta
;
783 struct iwl_station_priv
*sta_priv
;
786 sta
= ieee80211_find_sta(ctx
->vif
, addr1
);
788 sta_priv
= (void *)sta
->drv_priv
;
789 /* avoid atomic ops if this isn't a client */
790 if (sta_priv
->client
&&
791 atomic_dec_return(&sta_priv
->pending_frames
) == 0)
792 ieee80211_sta_block_awake(priv
->hw
, sta
, false);
798 * translate ucode response to mac80211 tx status control values
800 static void iwlagn_hwrate_to_tx_control(struct iwl_priv
*priv
, u32 rate_n_flags
,
801 struct ieee80211_tx_info
*info
)
803 struct ieee80211_tx_rate
*r
= &info
->status
.rates
[0];
805 info
->status
.antenna
=
806 ((rate_n_flags
& RATE_MCS_ANT_ABC_MSK
) >> RATE_MCS_ANT_POS
);
807 if (rate_n_flags
& RATE_MCS_HT_MSK
)
808 r
->flags
|= IEEE80211_TX_RC_MCS
;
809 if (rate_n_flags
& RATE_MCS_GF_MSK
)
810 r
->flags
|= IEEE80211_TX_RC_GREEN_FIELD
;
811 if (rate_n_flags
& RATE_MCS_HT40_MSK
)
812 r
->flags
|= IEEE80211_TX_RC_40_MHZ_WIDTH
;
813 if (rate_n_flags
& RATE_MCS_DUP_MSK
)
814 r
->flags
|= IEEE80211_TX_RC_DUP_DATA
;
815 if (rate_n_flags
& RATE_MCS_SGI_MSK
)
816 r
->flags
|= IEEE80211_TX_RC_SHORT_GI
;
817 r
->idx
= iwlagn_hwrate_to_mac80211_idx(rate_n_flags
, info
->band
);
820 #ifdef CONFIG_IWLWIFI_DEBUG
821 const char *iwl_get_tx_fail_reason(u32 status
)
823 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
824 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
826 switch (status
& TX_STATUS_MSK
) {
827 case TX_STATUS_SUCCESS
:
829 TX_STATUS_POSTPONE(DELAY
);
830 TX_STATUS_POSTPONE(FEW_BYTES
);
831 TX_STATUS_POSTPONE(BT_PRIO
);
832 TX_STATUS_POSTPONE(QUIET_PERIOD
);
833 TX_STATUS_POSTPONE(CALC_TTAK
);
834 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY
);
835 TX_STATUS_FAIL(SHORT_LIMIT
);
836 TX_STATUS_FAIL(LONG_LIMIT
);
837 TX_STATUS_FAIL(FIFO_UNDERRUN
);
838 TX_STATUS_FAIL(DRAIN_FLOW
);
839 TX_STATUS_FAIL(RFKILL_FLUSH
);
840 TX_STATUS_FAIL(LIFE_EXPIRE
);
841 TX_STATUS_FAIL(DEST_PS
);
842 TX_STATUS_FAIL(HOST_ABORTED
);
843 TX_STATUS_FAIL(BT_RETRY
);
844 TX_STATUS_FAIL(STA_INVALID
);
845 TX_STATUS_FAIL(FRAG_DROPPED
);
846 TX_STATUS_FAIL(TID_DISABLE
);
847 TX_STATUS_FAIL(FIFO_FLUSHED
);
848 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL
);
849 TX_STATUS_FAIL(PASSIVE_NO_RX
);
850 TX_STATUS_FAIL(NO_BEACON_ON_RADAR
);
855 #undef TX_STATUS_FAIL
856 #undef TX_STATUS_POSTPONE
858 #endif /* CONFIG_IWLWIFI_DEBUG */
860 static void iwlagn_count_agg_tx_err_status(struct iwl_priv
*priv
, u16 status
)
862 status
&= AGG_TX_STATUS_MSK
;
865 case AGG_TX_STATE_UNDERRUN_MSK
:
866 priv
->reply_agg_tx_stats
.underrun
++;
868 case AGG_TX_STATE_BT_PRIO_MSK
:
869 priv
->reply_agg_tx_stats
.bt_prio
++;
871 case AGG_TX_STATE_FEW_BYTES_MSK
:
872 priv
->reply_agg_tx_stats
.few_bytes
++;
874 case AGG_TX_STATE_ABORT_MSK
:
875 priv
->reply_agg_tx_stats
.abort
++;
877 case AGG_TX_STATE_LAST_SENT_TTL_MSK
:
878 priv
->reply_agg_tx_stats
.last_sent_ttl
++;
880 case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK
:
881 priv
->reply_agg_tx_stats
.last_sent_try
++;
883 case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK
:
884 priv
->reply_agg_tx_stats
.last_sent_bt_kill
++;
886 case AGG_TX_STATE_SCD_QUERY_MSK
:
887 priv
->reply_agg_tx_stats
.scd_query
++;
889 case AGG_TX_STATE_TEST_BAD_CRC32_MSK
:
890 priv
->reply_agg_tx_stats
.bad_crc32
++;
892 case AGG_TX_STATE_RESPONSE_MSK
:
893 priv
->reply_agg_tx_stats
.response
++;
895 case AGG_TX_STATE_DUMP_TX_MSK
:
896 priv
->reply_agg_tx_stats
.dump_tx
++;
898 case AGG_TX_STATE_DELAY_TX_MSK
:
899 priv
->reply_agg_tx_stats
.delay_tx
++;
902 priv
->reply_agg_tx_stats
.unknown
++;
907 static void iwl_rx_reply_tx_agg(struct iwl_priv
*priv
,
908 struct iwlagn_tx_resp
*tx_resp
)
910 struct agg_tx_status
*frame_status
= &tx_resp
->status
;
911 int tid
= (tx_resp
->ra_tid
& IWLAGN_TX_RES_TID_MSK
) >>
912 IWLAGN_TX_RES_TID_POS
;
913 int sta_id
= (tx_resp
->ra_tid
& IWLAGN_TX_RES_RA_MSK
) >>
914 IWLAGN_TX_RES_RA_POS
;
915 struct iwl_ht_agg
*agg
= &priv
->tid_data
[sta_id
][tid
].agg
;
916 u32 status
= le16_to_cpu(tx_resp
->status
.status
);
919 WARN_ON(tid
== IWL_TID_NON_QOS
);
921 if (agg
->wait_for_ba
)
922 IWL_DEBUG_TX_REPLY(priv
,
923 "got tx response w/o block-ack\n");
925 agg
->rate_n_flags
= le32_to_cpu(tx_resp
->rate_n_flags
);
926 agg
->wait_for_ba
= (tx_resp
->frame_count
> 1);
929 * If the BT kill count is non-zero, we'll get this
930 * notification again.
932 if (tx_resp
->bt_kill_count
&& tx_resp
->frame_count
== 1 &&
933 priv
->cfg
->bt_params
&&
934 priv
->cfg
->bt_params
->advanced_bt_coexist
) {
935 IWL_DEBUG_COEX(priv
, "receive reply tx w/ bt_kill\n");
938 if (tx_resp
->frame_count
== 1)
941 /* Construct bit-map of pending frames within Tx window */
942 for (i
= 0; i
< tx_resp
->frame_count
; i
++) {
943 u16 fstatus
= le16_to_cpu(frame_status
[i
].status
);
945 if (status
& AGG_TX_STATUS_MSK
)
946 iwlagn_count_agg_tx_err_status(priv
, fstatus
);
948 if (status
& (AGG_TX_STATE_FEW_BYTES_MSK
|
949 AGG_TX_STATE_ABORT_MSK
))
952 IWL_DEBUG_TX_REPLY(priv
, "status %s (0x%08x), "
953 "try-count (0x%08x)\n",
954 iwl_get_agg_tx_fail_reason(fstatus
),
955 fstatus
& AGG_TX_STATUS_MSK
,
956 fstatus
& AGG_TX_TRY_MSK
);
960 #ifdef CONFIG_IWLWIFI_DEBUG
961 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
963 const char *iwl_get_agg_tx_fail_reason(u16 status
)
965 status
&= AGG_TX_STATUS_MSK
;
967 case AGG_TX_STATE_TRANSMITTED
:
969 AGG_TX_STATE_FAIL(UNDERRUN_MSK
);
970 AGG_TX_STATE_FAIL(BT_PRIO_MSK
);
971 AGG_TX_STATE_FAIL(FEW_BYTES_MSK
);
972 AGG_TX_STATE_FAIL(ABORT_MSK
);
973 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK
);
974 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK
);
975 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK
);
976 AGG_TX_STATE_FAIL(SCD_QUERY_MSK
);
977 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK
);
978 AGG_TX_STATE_FAIL(RESPONSE_MSK
);
979 AGG_TX_STATE_FAIL(DUMP_TX_MSK
);
980 AGG_TX_STATE_FAIL(DELAY_TX_MSK
);
985 #endif /* CONFIG_IWLWIFI_DEBUG */
987 static inline u32
iwlagn_get_scd_ssn(struct iwlagn_tx_resp
*tx_resp
)
989 return le32_to_cpup((__le32
*)&tx_resp
->status
+
990 tx_resp
->frame_count
) & MAX_SN
;
993 static void iwlagn_count_tx_err_status(struct iwl_priv
*priv
, u16 status
)
995 status
&= TX_STATUS_MSK
;
998 case TX_STATUS_POSTPONE_DELAY
:
999 priv
->reply_tx_stats
.pp_delay
++;
1001 case TX_STATUS_POSTPONE_FEW_BYTES
:
1002 priv
->reply_tx_stats
.pp_few_bytes
++;
1004 case TX_STATUS_POSTPONE_BT_PRIO
:
1005 priv
->reply_tx_stats
.pp_bt_prio
++;
1007 case TX_STATUS_POSTPONE_QUIET_PERIOD
:
1008 priv
->reply_tx_stats
.pp_quiet_period
++;
1010 case TX_STATUS_POSTPONE_CALC_TTAK
:
1011 priv
->reply_tx_stats
.pp_calc_ttak
++;
1013 case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY
:
1014 priv
->reply_tx_stats
.int_crossed_retry
++;
1016 case TX_STATUS_FAIL_SHORT_LIMIT
:
1017 priv
->reply_tx_stats
.short_limit
++;
1019 case TX_STATUS_FAIL_LONG_LIMIT
:
1020 priv
->reply_tx_stats
.long_limit
++;
1022 case TX_STATUS_FAIL_FIFO_UNDERRUN
:
1023 priv
->reply_tx_stats
.fifo_underrun
++;
1025 case TX_STATUS_FAIL_DRAIN_FLOW
:
1026 priv
->reply_tx_stats
.drain_flow
++;
1028 case TX_STATUS_FAIL_RFKILL_FLUSH
:
1029 priv
->reply_tx_stats
.rfkill_flush
++;
1031 case TX_STATUS_FAIL_LIFE_EXPIRE
:
1032 priv
->reply_tx_stats
.life_expire
++;
1034 case TX_STATUS_FAIL_DEST_PS
:
1035 priv
->reply_tx_stats
.dest_ps
++;
1037 case TX_STATUS_FAIL_HOST_ABORTED
:
1038 priv
->reply_tx_stats
.host_abort
++;
1040 case TX_STATUS_FAIL_BT_RETRY
:
1041 priv
->reply_tx_stats
.bt_retry
++;
1043 case TX_STATUS_FAIL_STA_INVALID
:
1044 priv
->reply_tx_stats
.sta_invalid
++;
1046 case TX_STATUS_FAIL_FRAG_DROPPED
:
1047 priv
->reply_tx_stats
.frag_drop
++;
1049 case TX_STATUS_FAIL_TID_DISABLE
:
1050 priv
->reply_tx_stats
.tid_disable
++;
1052 case TX_STATUS_FAIL_FIFO_FLUSHED
:
1053 priv
->reply_tx_stats
.fifo_flush
++;
1055 case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL
:
1056 priv
->reply_tx_stats
.insuff_cf_poll
++;
1058 case TX_STATUS_FAIL_PASSIVE_NO_RX
:
1059 priv
->reply_tx_stats
.fail_hw_drop
++;
1061 case TX_STATUS_FAIL_NO_BEACON_ON_RADAR
:
1062 priv
->reply_tx_stats
.sta_color_mismatch
++;
1065 priv
->reply_tx_stats
.unknown
++;
1070 static void iwlagn_set_tx_status(struct iwl_priv
*priv
,
1071 struct ieee80211_tx_info
*info
,
1072 struct iwlagn_tx_resp
*tx_resp
,
1075 u16 status
= le16_to_cpu(tx_resp
->status
.status
);
1077 info
->status
.rates
[0].count
= tx_resp
->failure_frame
+ 1;
1079 info
->flags
&= ~IEEE80211_TX_CTL_AMPDU
;
1080 info
->flags
|= iwl_tx_status_to_mac80211(status
);
1081 iwlagn_hwrate_to_tx_control(priv
, le32_to_cpu(tx_resp
->rate_n_flags
),
1083 if (!iwl_is_tx_success(status
))
1084 iwlagn_count_tx_err_status(priv
, status
);
1087 static void iwl_check_abort_status(struct iwl_priv
*priv
,
1088 u8 frame_count
, u32 status
)
1090 if (frame_count
== 1 && status
== TX_STATUS_FAIL_RFKILL_FLUSH
) {
1091 IWL_ERR(priv
, "Tx flush command to flush out all frames\n");
1092 if (!test_bit(STATUS_EXIT_PENDING
, &priv
->status
))
1093 queue_work(priv
->workqueue
, &priv
->tx_flush
);
1097 static int iwl_reclaim(struct iwl_priv
*priv
, int sta_id
, int tid
,
1098 int txq_id
, int ssn
, struct sk_buff_head
*skbs
)
1100 if (unlikely(txq_id
>= IWLAGN_FIRST_AMPDU_QUEUE
&&
1101 tid
!= IWL_TID_NON_QOS
&&
1102 txq_id
!= priv
->tid_data
[sta_id
][tid
].agg
.txq_id
)) {
1104 * FIXME: this is a uCode bug which need to be addressed,
1105 * log the information and return for now.
1106 * Since it is can possibly happen very often and in order
1107 * not to fill the syslog, don't use IWL_ERR or IWL_WARN
1109 IWL_DEBUG_TX_QUEUES(priv
,
1110 "Bad queue mapping txq_id=%d, agg_txq[sta:%d,tid:%d]=%d\n",
1111 txq_id
, sta_id
, tid
,
1112 priv
->tid_data
[sta_id
][tid
].agg
.txq_id
);
1116 iwl_trans_reclaim(priv
->trans
, txq_id
, ssn
, skbs
);
1120 int iwlagn_rx_reply_tx(struct iwl_priv
*priv
, struct iwl_rx_cmd_buffer
*rxb
,
1121 struct iwl_device_cmd
*cmd
)
1123 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
1124 u16 sequence
= le16_to_cpu(pkt
->hdr
.sequence
);
1125 int txq_id
= SEQ_TO_QUEUE(sequence
);
1126 int cmd_index __maybe_unused
= SEQ_TO_INDEX(sequence
);
1127 struct iwlagn_tx_resp
*tx_resp
= (void *)pkt
->data
;
1128 struct ieee80211_hdr
*hdr
;
1129 u32 status
= le16_to_cpu(tx_resp
->status
.status
);
1130 u16 ssn
= iwlagn_get_scd_ssn(tx_resp
);
1134 struct ieee80211_tx_info
*info
;
1135 struct sk_buff_head skbs
;
1136 struct sk_buff
*skb
;
1137 struct iwl_rxon_context
*ctx
;
1138 bool is_agg
= (txq_id
>= IWLAGN_FIRST_AMPDU_QUEUE
);
1140 tid
= (tx_resp
->ra_tid
& IWLAGN_TX_RES_TID_MSK
) >>
1141 IWLAGN_TX_RES_TID_POS
;
1142 sta_id
= (tx_resp
->ra_tid
& IWLAGN_TX_RES_RA_MSK
) >>
1143 IWLAGN_TX_RES_RA_POS
;
1145 spin_lock(&priv
->sta_lock
);
1148 iwl_rx_reply_tx_agg(priv
, tx_resp
);
1150 __skb_queue_head_init(&skbs
);
1152 if (tx_resp
->frame_count
== 1) {
1153 u16 next_reclaimed
= le16_to_cpu(tx_resp
->seq_ctl
);
1154 next_reclaimed
= SEQ_TO_SN(next_reclaimed
+ 0x10);
1157 /* If this is an aggregation queue, we can rely on the
1158 * ssn since the wifi sequence number corresponds to
1159 * the index in the TFD ring (%256).
1160 * The seq_ctl is the sequence control of the packet
1161 * to which this Tx response relates. But if there is a
1162 * hole in the bitmap of the BA we received, this Tx
1163 * response may allow to reclaim the hole and all the
1164 * subsequent packets that were already acked.
1165 * In that case, seq_ctl != ssn, and the next packet
1166 * to be reclaimed will be ssn and not seq_ctl.
1168 next_reclaimed
= ssn
;
1171 if (tid
!= IWL_TID_NON_QOS
) {
1172 priv
->tid_data
[sta_id
][tid
].next_reclaimed
=
1174 IWL_DEBUG_TX_REPLY(priv
, "Next reclaimed packet:%d\n",
1178 /*we can free until ssn % q.n_bd not inclusive */
1179 WARN_ON(iwl_reclaim(priv
, sta_id
, tid
, txq_id
, ssn
, &skbs
));
1180 iwlagn_check_ratid_empty(priv
, sta_id
, tid
);
1183 /* process frames */
1184 skb_queue_walk(&skbs
, skb
) {
1185 hdr
= (struct ieee80211_hdr
*)skb
->data
;
1187 if (!ieee80211_is_data_qos(hdr
->frame_control
))
1188 priv
->last_seq_ctl
= tx_resp
->seq_ctl
;
1190 info
= IEEE80211_SKB_CB(skb
);
1191 ctx
= info
->driver_data
[0];
1192 kmem_cache_free(iwl_tx_cmd_pool
,
1193 (info
->driver_data
[1]));
1195 memset(&info
->status
, 0, sizeof(info
->status
));
1197 if (status
== TX_STATUS_FAIL_PASSIVE_NO_RX
&&
1198 iwl_is_associated_ctx(ctx
) && ctx
->vif
&&
1199 ctx
->vif
->type
== NL80211_IFTYPE_STATION
) {
1200 /* block and stop all queues */
1201 priv
->passive_no_rx
= true;
1202 IWL_DEBUG_TX_QUEUES(priv
, "stop all queues: "
1204 ieee80211_stop_queues(priv
->hw
);
1206 IWL_DEBUG_TX_REPLY(priv
,
1207 "TXQ %d status %s (0x%08x) "
1208 "rate_n_flags 0x%x retries %d\n",
1210 iwl_get_tx_fail_reason(status
),
1212 le32_to_cpu(tx_resp
->rate_n_flags
),
1213 tx_resp
->failure_frame
);
1215 IWL_DEBUG_TX_REPLY(priv
,
1216 "FrameCnt = %d, idx=%d\n",
1217 tx_resp
->frame_count
, cmd_index
);
1220 /* check if BAR is needed */
1221 if (is_agg
&& !iwl_is_tx_success(status
))
1222 info
->flags
|= IEEE80211_TX_STAT_AMPDU_NO_BACK
;
1223 iwlagn_set_tx_status(priv
, IEEE80211_SKB_CB(skb
),
1226 iwlagn_non_agg_tx_status(priv
, ctx
, hdr
->addr1
);
1231 WARN_ON(!is_agg
&& freed
!= 1);
1234 iwl_check_abort_status(priv
, tx_resp
->frame_count
, status
);
1235 spin_unlock(&priv
->sta_lock
);
1237 while (!skb_queue_empty(&skbs
)) {
1238 skb
= __skb_dequeue(&skbs
);
1239 ieee80211_tx_status(priv
->hw
, skb
);
1246 * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
1248 * Handles block-acknowledge notification from device, which reports success
1249 * of frames sent via aggregation.
1251 int iwlagn_rx_reply_compressed_ba(struct iwl_priv
*priv
,
1252 struct iwl_rx_cmd_buffer
*rxb
,
1253 struct iwl_device_cmd
*cmd
)
1255 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
1256 struct iwl_compressed_ba_resp
*ba_resp
= (void *)pkt
->data
;
1257 struct iwl_ht_agg
*agg
;
1258 struct sk_buff_head reclaimed_skbs
;
1259 struct ieee80211_tx_info
*info
;
1260 struct ieee80211_hdr
*hdr
;
1261 struct sk_buff
*skb
;
1266 /* "flow" corresponds to Tx queue */
1267 u16 scd_flow
= le16_to_cpu(ba_resp
->scd_flow
);
1269 /* "ssn" is start of block-ack Tx window, corresponds to index
1270 * (in Tx queue's circular buffer) of first TFD/frame in window */
1271 u16 ba_resp_scd_ssn
= le16_to_cpu(ba_resp
->scd_ssn
);
1273 if (scd_flow
>= priv
->cfg
->base_params
->num_of_queues
) {
1275 "BUG_ON scd_flow is bigger than number of queues\n");
1279 sta_id
= ba_resp
->sta_id
;
1281 agg
= &priv
->tid_data
[sta_id
][tid
].agg
;
1283 spin_lock(&priv
->sta_lock
);
1285 if (unlikely(!agg
->wait_for_ba
)) {
1286 if (unlikely(ba_resp
->bitmap
))
1287 IWL_ERR(priv
, "Received BA when not expected\n");
1288 spin_unlock(&priv
->sta_lock
);
1292 __skb_queue_head_init(&reclaimed_skbs
);
1294 /* Release all TFDs before the SSN, i.e. all TFDs in front of
1295 * block-ack window (we assume that they've been successfully
1296 * transmitted ... if not, it's too late anyway). */
1297 if (iwl_reclaim(priv
, sta_id
, tid
, scd_flow
,
1298 ba_resp_scd_ssn
, &reclaimed_skbs
)) {
1299 spin_unlock(&priv
->sta_lock
);
1303 IWL_DEBUG_TX_REPLY(priv
, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
1306 (u8
*) &ba_resp
->sta_addr_lo32
,
1308 IWL_DEBUG_TX_REPLY(priv
, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, "
1309 "scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1310 ba_resp
->tid
, le16_to_cpu(ba_resp
->seq_ctl
),
1311 (unsigned long long)le64_to_cpu(ba_resp
->bitmap
),
1312 scd_flow
, ba_resp_scd_ssn
, ba_resp
->txed
,
1313 ba_resp
->txed_2_done
);
1315 /* Mark that the expected block-ack response arrived */
1316 agg
->wait_for_ba
= false;
1318 /* Sanity check values reported by uCode */
1319 if (ba_resp
->txed_2_done
> ba_resp
->txed
) {
1320 IWL_DEBUG_TX_REPLY(priv
,
1321 "bogus sent(%d) and ack(%d) count\n",
1322 ba_resp
->txed
, ba_resp
->txed_2_done
);
1324 * set txed_2_done = txed,
1325 * so it won't impact rate scale
1327 ba_resp
->txed
= ba_resp
->txed_2_done
;
1330 priv
->tid_data
[sta_id
][tid
].next_reclaimed
= ba_resp_scd_ssn
;
1332 iwlagn_check_ratid_empty(priv
, sta_id
, tid
);
1335 skb_queue_walk(&reclaimed_skbs
, skb
) {
1336 hdr
= (struct ieee80211_hdr
*)skb
->data
;
1338 if (ieee80211_is_data_qos(hdr
->frame_control
))
1343 info
= IEEE80211_SKB_CB(skb
);
1344 kmem_cache_free(iwl_tx_cmd_pool
, (info
->driver_data
[1]));
1347 /* this is the first skb we deliver in this batch */
1348 /* put the rate scaling data there */
1349 info
= IEEE80211_SKB_CB(skb
);
1350 memset(&info
->status
, 0, sizeof(info
->status
));
1351 info
->flags
|= IEEE80211_TX_STAT_ACK
;
1352 info
->flags
|= IEEE80211_TX_STAT_AMPDU
;
1353 info
->status
.ampdu_ack_len
= ba_resp
->txed_2_done
;
1354 info
->status
.ampdu_len
= ba_resp
->txed
;
1355 iwlagn_hwrate_to_tx_control(priv
, agg
->rate_n_flags
,
1360 spin_unlock(&priv
->sta_lock
);
1362 while (!skb_queue_empty(&reclaimed_skbs
)) {
1363 skb
= __skb_dequeue(&reclaimed_skbs
);
1364 ieee80211_tx_status(priv
->hw
, skb
);