1 /******************************************************************************
3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
9 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of version 2 of the GNU General Public License as
13 * published by the Free Software Foundation.
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
25 * The full GNU General Public License is included in this distribution
26 * in the file called COPYING.
28 * Contact Information:
29 * Intel Linux Wireless <linuxwifi@intel.com>
30 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
34 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
35 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
36 * All rights reserved.
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
42 * * Redistributions of source code must retain the above copyright
43 * notice, this list of conditions and the following disclaimer.
44 * * Redistributions in binary form must reproduce the above copyright
45 * notice, this list of conditions and the following disclaimer in
46 * the documentation and/or other materials provided with the
48 * * Neither the name Intel Corporation nor the names of its
49 * contributors may be used to endorse or promote products derived
50 * from this software without specific prior written permission.
52 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
53 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
54 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
55 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
56 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
57 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
58 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
59 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
60 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
61 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
62 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
64 *****************************************************************************/
65 #include <linux/ieee80211.h>
66 #include <linux/etherdevice.h>
67 #include <linux/tcp.h>
69 #include "iwl-trans.h"
70 #include "iwl-eeprom-parse.h"
76 iwl_mvm_bar_check_trigger(struct iwl_mvm
*mvm
, const u8
*addr
,
79 struct iwl_fw_dbg_trigger_tlv
*trig
;
80 struct iwl_fw_dbg_trigger_ba
*ba_trig
;
82 if (!iwl_fw_dbg_trigger_enabled(mvm
->fw
, FW_DBG_TRIGGER_BA
))
85 trig
= iwl_fw_dbg_get_trigger(mvm
->fw
, FW_DBG_TRIGGER_BA
);
86 ba_trig
= (void *)trig
->data
;
88 if (!iwl_fw_dbg_trigger_check_stop(mvm
, NULL
, trig
))
91 if (!(le16_to_cpu(ba_trig
->tx_bar
) & BIT(tid
)))
94 iwl_mvm_fw_dbg_collect_trig(mvm
, trig
,
95 "BAR sent to %pM, tid %d, ssn %d",
100 * Sets most of the Tx cmd's fields
102 void iwl_mvm_set_tx_cmd(struct iwl_mvm
*mvm
, struct sk_buff
*skb
,
103 struct iwl_tx_cmd
*tx_cmd
,
104 struct ieee80211_tx_info
*info
, u8 sta_id
)
106 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
107 __le16 fc
= hdr
->frame_control
;
108 u32 tx_flags
= le32_to_cpu(tx_cmd
->tx_flags
);
109 u32 len
= skb
->len
+ FCS_LEN
;
112 if (!(info
->flags
& IEEE80211_TX_CTL_NO_ACK
))
113 tx_flags
|= TX_CMD_FLG_ACK
;
115 tx_flags
&= ~TX_CMD_FLG_ACK
;
117 if (ieee80211_is_probe_resp(fc
))
118 tx_flags
|= TX_CMD_FLG_TSF
;
120 if (ieee80211_has_morefrags(fc
))
121 tx_flags
|= TX_CMD_FLG_MORE_FRAG
;
123 if (ieee80211_is_data_qos(fc
)) {
124 u8
*qc
= ieee80211_get_qos_ctl(hdr
);
125 tx_cmd
->tid_tspec
= qc
[0] & 0xf;
126 tx_flags
&= ~TX_CMD_FLG_SEQ_CTL
;
127 } else if (ieee80211_is_back_req(fc
)) {
128 struct ieee80211_bar
*bar
= (void *)skb
->data
;
129 u16 control
= le16_to_cpu(bar
->control
);
130 u16 ssn
= le16_to_cpu(bar
->start_seq_num
);
132 tx_flags
|= TX_CMD_FLG_ACK
| TX_CMD_FLG_BAR
;
133 tx_cmd
->tid_tspec
= (control
&
134 IEEE80211_BAR_CTRL_TID_INFO_MASK
) >>
135 IEEE80211_BAR_CTRL_TID_INFO_SHIFT
;
136 WARN_ON_ONCE(tx_cmd
->tid_tspec
>= IWL_MAX_TID_COUNT
);
137 iwl_mvm_bar_check_trigger(mvm
, bar
->ra
, tx_cmd
->tid_tspec
,
140 tx_cmd
->tid_tspec
= IWL_TID_NON_QOS
;
141 if (info
->flags
& IEEE80211_TX_CTL_ASSIGN_SEQ
)
142 tx_flags
|= TX_CMD_FLG_SEQ_CTL
;
144 tx_flags
&= ~TX_CMD_FLG_SEQ_CTL
;
147 /* Default to 0 (BE) when tid_spec is set to IWL_TID_NON_QOS */
148 if (tx_cmd
->tid_tspec
< IWL_MAX_TID_COUNT
)
149 ac
= tid_to_mac80211_ac
[tx_cmd
->tid_tspec
];
151 ac
= tid_to_mac80211_ac
[0];
153 tx_flags
|= iwl_mvm_bt_coex_tx_prio(mvm
, hdr
, info
, ac
) <<
154 TX_CMD_FLG_BT_PRIO_POS
;
156 if (ieee80211_is_mgmt(fc
)) {
157 if (ieee80211_is_assoc_req(fc
) || ieee80211_is_reassoc_req(fc
))
158 tx_cmd
->pm_frame_timeout
= cpu_to_le16(PM_FRAME_ASSOC
);
159 else if (ieee80211_is_action(fc
))
160 tx_cmd
->pm_frame_timeout
= cpu_to_le16(PM_FRAME_NONE
);
162 tx_cmd
->pm_frame_timeout
= cpu_to_le16(PM_FRAME_MGMT
);
164 /* The spec allows Action frames in A-MPDU, we don't support
167 WARN_ON_ONCE(info
->flags
& IEEE80211_TX_CTL_AMPDU
);
168 } else if (info
->control
.flags
& IEEE80211_TX_CTRL_PORT_CTRL_PROTO
) {
169 tx_cmd
->pm_frame_timeout
= cpu_to_le16(PM_FRAME_MGMT
);
171 tx_cmd
->pm_frame_timeout
= cpu_to_le16(PM_FRAME_NONE
);
174 if (ieee80211_is_data(fc
) && len
> mvm
->rts_threshold
&&
175 !is_multicast_ether_addr(ieee80211_get_DA(hdr
)))
176 tx_flags
|= TX_CMD_FLG_PROT_REQUIRE
;
178 if (fw_has_capa(&mvm
->fw
->ucode_capa
,
179 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT
) &&
180 ieee80211_action_contains_tpc(skb
))
181 tx_flags
|= TX_CMD_FLG_WRITE_TX_POWER
;
183 tx_cmd
->tx_flags
= cpu_to_le32(tx_flags
);
184 /* Total # bytes to be transmitted */
185 tx_cmd
->len
= cpu_to_le16((u16
)skb
->len
);
186 tx_cmd
->next_frame_len
= 0;
187 tx_cmd
->life_time
= cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE
);
188 tx_cmd
->sta_id
= sta_id
;
192 * Sets the fields in the Tx cmd that are rate related
194 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm
*mvm
, struct iwl_tx_cmd
*tx_cmd
,
195 struct ieee80211_tx_info
*info
,
196 struct ieee80211_sta
*sta
, __le16 fc
)
202 /* Set retry limit on RTS packets */
203 tx_cmd
->rts_retry_limit
= IWL_RTS_DFAULT_RETRY_LIMIT
;
205 /* Set retry limit on DATA packets and Probe Responses*/
206 if (ieee80211_is_probe_resp(fc
)) {
207 tx_cmd
->data_retry_limit
= IWL_MGMT_DFAULT_RETRY_LIMIT
;
208 tx_cmd
->rts_retry_limit
=
209 min(tx_cmd
->data_retry_limit
, tx_cmd
->rts_retry_limit
);
210 } else if (ieee80211_is_back_req(fc
)) {
211 tx_cmd
->data_retry_limit
= IWL_BAR_DFAULT_RETRY_LIMIT
;
213 tx_cmd
->data_retry_limit
= IWL_DEFAULT_TX_RETRY
;
217 * for data packets, rate info comes from the table inside the fw. This
218 * table is controlled by LINK_QUALITY commands
221 if (ieee80211_is_data(fc
) && sta
) {
222 tx_cmd
->initial_rate_index
= 0;
223 tx_cmd
->tx_flags
|= cpu_to_le32(TX_CMD_FLG_STA_RATE
);
225 } else if (ieee80211_is_back_req(fc
)) {
227 cpu_to_le32(TX_CMD_FLG_ACK
| TX_CMD_FLG_BAR
);
230 /* HT rate doesn't make sense for a non data frame */
231 WARN_ONCE(info
->control
.rates
[0].flags
& IEEE80211_TX_RC_MCS
,
232 "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame (fc:0x%x)\n",
233 info
->control
.rates
[0].flags
,
234 info
->control
.rates
[0].idx
,
237 rate_idx
= info
->control
.rates
[0].idx
;
238 /* if the rate isn't a well known legacy rate, take the lowest one */
239 if (rate_idx
< 0 || rate_idx
> IWL_RATE_COUNT_LEGACY
)
240 rate_idx
= rate_lowest_index(
241 &mvm
->nvm_data
->bands
[info
->band
], sta
);
243 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
244 if (info
->band
== IEEE80211_BAND_5GHZ
)
245 rate_idx
+= IWL_FIRST_OFDM_RATE
;
247 /* For 2.4 GHZ band, check that there is no need to remap */
248 BUILD_BUG_ON(IWL_FIRST_CCK_RATE
!= 0);
250 /* Get PLCP rate for tx_cmd->rate_n_flags */
251 rate_plcp
= iwl_mvm_mac80211_idx_to_hwrate(rate_idx
);
253 mvm
->mgmt_last_antenna_idx
=
254 iwl_mvm_next_antenna(mvm
, iwl_mvm_get_valid_tx_ant(mvm
),
255 mvm
->mgmt_last_antenna_idx
);
257 if (info
->band
== IEEE80211_BAND_2GHZ
&&
258 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm
))
259 rate_flags
= mvm
->cfg
->non_shared_ant
<< RATE_MCS_ANT_POS
;
262 BIT(mvm
->mgmt_last_antenna_idx
) << RATE_MCS_ANT_POS
;
264 /* Set CCK flag as needed */
265 if ((rate_idx
>= IWL_FIRST_CCK_RATE
) && (rate_idx
<= IWL_LAST_CCK_RATE
))
266 rate_flags
|= RATE_MCS_CCK_MSK
;
268 /* Set the rate in the TX cmd */
269 tx_cmd
->rate_n_flags
= cpu_to_le32((u32
)rate_plcp
| rate_flags
);
273 * Sets the fields in the Tx cmd that are crypto related
275 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm
*mvm
,
276 struct ieee80211_tx_info
*info
,
277 struct iwl_tx_cmd
*tx_cmd
,
278 struct sk_buff
*skb_frag
,
281 struct ieee80211_key_conf
*keyconf
= info
->control
.hw_key
;
282 u8
*crypto_hdr
= skb_frag
->data
+ hdrlen
;
285 switch (keyconf
->cipher
) {
286 case WLAN_CIPHER_SUITE_CCMP
:
287 case WLAN_CIPHER_SUITE_CCMP_256
:
288 iwl_mvm_set_tx_cmd_ccmp(info
, tx_cmd
);
289 pn
= atomic64_inc_return(&keyconf
->tx_pn
);
292 crypto_hdr
[3] = 0x20 | (keyconf
->keyidx
<< 6);
293 crypto_hdr
[1] = pn
>> 8;
294 crypto_hdr
[4] = pn
>> 16;
295 crypto_hdr
[5] = pn
>> 24;
296 crypto_hdr
[6] = pn
>> 32;
297 crypto_hdr
[7] = pn
>> 40;
300 case WLAN_CIPHER_SUITE_TKIP
:
301 tx_cmd
->sec_ctl
= TX_CMD_SEC_TKIP
;
302 pn
= atomic64_inc_return(&keyconf
->tx_pn
);
303 ieee80211_tkip_add_iv(crypto_hdr
, keyconf
, pn
);
304 ieee80211_get_tkip_p2k(keyconf
, skb_frag
, tx_cmd
->key
);
307 case WLAN_CIPHER_SUITE_WEP104
:
308 tx_cmd
->sec_ctl
|= TX_CMD_SEC_KEY128
;
310 case WLAN_CIPHER_SUITE_WEP40
:
311 tx_cmd
->sec_ctl
|= TX_CMD_SEC_WEP
|
312 ((keyconf
->keyidx
<< TX_CMD_SEC_WEP_KEY_IDX_POS
) &
313 TX_CMD_SEC_WEP_KEY_IDX_MSK
);
315 memcpy(&tx_cmd
->key
[3], keyconf
->key
, keyconf
->keylen
);
318 tx_cmd
->sec_ctl
|= TX_CMD_SEC_EXT
;
323 * Allocates and sets the Tx cmd the driver data pointers in the skb
325 static struct iwl_device_cmd
*
326 iwl_mvm_set_tx_params(struct iwl_mvm
*mvm
, struct sk_buff
*skb
,
327 int hdrlen
, struct ieee80211_sta
*sta
, u8 sta_id
)
329 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
330 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
331 struct iwl_device_cmd
*dev_cmd
;
332 struct iwl_tx_cmd
*tx_cmd
;
334 dev_cmd
= iwl_trans_alloc_tx_cmd(mvm
->trans
);
336 if (unlikely(!dev_cmd
))
339 memset(dev_cmd
, 0, sizeof(*dev_cmd
));
340 dev_cmd
->hdr
.cmd
= TX_CMD
;
341 tx_cmd
= (struct iwl_tx_cmd
*)dev_cmd
->payload
;
343 if (info
->control
.hw_key
)
344 iwl_mvm_set_tx_cmd_crypto(mvm
, info
, tx_cmd
, skb
, hdrlen
);
346 iwl_mvm_set_tx_cmd(mvm
, skb
, tx_cmd
, info
, sta_id
);
348 iwl_mvm_set_tx_cmd_rate(mvm
, tx_cmd
, info
, sta
, hdr
->frame_control
);
350 memset(&info
->status
, 0, sizeof(info
->status
));
351 memset(info
->driver_data
, 0, sizeof(info
->driver_data
));
353 info
->driver_data
[1] = dev_cmd
;
358 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm
*mvm
, struct sk_buff
*skb
)
360 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
361 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
362 struct iwl_device_cmd
*dev_cmd
;
363 struct iwl_tx_cmd
*tx_cmd
;
365 int hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
367 if (WARN_ON_ONCE(info
->flags
& IEEE80211_TX_CTL_AMPDU
))
370 if (WARN_ON_ONCE(info
->flags
& IEEE80211_TX_CTL_SEND_AFTER_DTIM
&&
371 (!info
->control
.vif
||
372 info
->hw_queue
!= info
->control
.vif
->cab_queue
)))
376 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used
377 * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel
378 * queue. STATION (HS2.0) uses the auxiliary context of the FW,
379 * and hence needs to be sent on the aux queue
381 if (IEEE80211_SKB_CB(skb
)->hw_queue
== IWL_MVM_OFFCHANNEL_QUEUE
&&
382 info
->control
.vif
->type
== NL80211_IFTYPE_STATION
)
383 IEEE80211_SKB_CB(skb
)->hw_queue
= mvm
->aux_queue
;
386 * If the interface on which the frame is sent is the P2P_DEVICE
387 * or an AP/GO interface use the broadcast station associated
388 * with it; otherwise if the interface is a managed interface
389 * use the AP station associated with it for multicast traffic
390 * (this is not possible for unicast packets as a TLDS discovery
391 * response are sent without a station entry); otherwise use the
394 sta_id
= mvm
->aux_sta
.sta_id
;
395 if (info
->control
.vif
) {
396 struct iwl_mvm_vif
*mvmvif
=
397 iwl_mvm_vif_from_mac80211(info
->control
.vif
);
399 if (info
->control
.vif
->type
== NL80211_IFTYPE_P2P_DEVICE
||
400 info
->control
.vif
->type
== NL80211_IFTYPE_AP
)
401 sta_id
= mvmvif
->bcast_sta
.sta_id
;
402 else if (info
->control
.vif
->type
== NL80211_IFTYPE_STATION
&&
403 is_multicast_ether_addr(hdr
->addr1
)) {
404 u8 ap_sta_id
= ACCESS_ONCE(mvmvif
->ap_sta_id
);
406 if (ap_sta_id
!= IWL_MVM_STATION_COUNT
)
411 IWL_DEBUG_TX(mvm
, "station Id %d, queue=%d\n", sta_id
, info
->hw_queue
);
413 dev_cmd
= iwl_mvm_set_tx_params(mvm
, skb
, hdrlen
, NULL
, sta_id
);
417 /* From now on, we cannot access info->control */
418 tx_cmd
= (struct iwl_tx_cmd
*)dev_cmd
->payload
;
420 /* Copy MAC header from skb into command buffer */
421 memcpy(tx_cmd
->hdr
, hdr
, hdrlen
);
423 if (iwl_trans_tx(mvm
->trans
, skb
, dev_cmd
, info
->hw_queue
)) {
424 iwl_trans_free_tx_cmd(mvm
->trans
, dev_cmd
);
431 static int iwl_mvm_tx_tso(struct iwl_mvm
*mvm
, struct sk_buff
*skb_gso
,
432 struct ieee80211_sta
*sta
,
433 struct sk_buff_head
*mpdus_skb
)
435 struct sk_buff
*tmp
, *next
;
436 char cb
[sizeof(skb_gso
->cb
)];
438 memcpy(cb
, skb_gso
->cb
, sizeof(cb
));
439 next
= skb_gso_segment(skb_gso
, 0);
443 consume_skb(skb_gso
);
448 memcpy(tmp
->cb
, cb
, sizeof(tmp
->cb
));
453 __skb_queue_tail(mpdus_skb
, tmp
);
460 * Sets the fields in the Tx cmd that are crypto related
462 static int iwl_mvm_tx_mpdu(struct iwl_mvm
*mvm
, struct sk_buff
*skb
,
463 struct ieee80211_sta
*sta
)
465 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
466 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
467 struct iwl_mvm_sta
*mvmsta
;
468 struct iwl_device_cmd
*dev_cmd
;
469 struct iwl_tx_cmd
*tx_cmd
;
472 u8 tid
= IWL_MAX_TID_COUNT
;
473 u8 txq_id
= info
->hw_queue
;
474 bool is_data_qos
= false, is_ampdu
= false;
477 mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
478 fc
= hdr
->frame_control
;
479 hdrlen
= ieee80211_hdrlen(fc
);
481 if (WARN_ON_ONCE(!mvmsta
))
484 if (WARN_ON_ONCE(mvmsta
->sta_id
== IWL_MVM_STATION_COUNT
))
487 dev_cmd
= iwl_mvm_set_tx_params(mvm
, skb
, hdrlen
, sta
, mvmsta
->sta_id
);
491 tx_cmd
= (struct iwl_tx_cmd
*)dev_cmd
->payload
;
492 /* From now on, we cannot access info->control */
495 * we handle that entirely ourselves -- for uAPSD the firmware
496 * will always send a notification, and for PS-Poll responses
497 * we'll notify mac80211 when getting frame status
499 info
->flags
&= ~IEEE80211_TX_STATUS_EOSP
;
501 spin_lock(&mvmsta
->lock
);
503 if (ieee80211_is_data_qos(fc
) && !ieee80211_is_qos_nullfunc(fc
)) {
505 qc
= ieee80211_get_qos_ctl(hdr
);
506 tid
= qc
[0] & IEEE80211_QOS_CTL_TID_MASK
;
507 if (WARN_ON_ONCE(tid
>= IWL_MAX_TID_COUNT
))
508 goto drop_unlock_sta
;
510 seq_number
= mvmsta
->tid_data
[tid
].seq_number
;
511 seq_number
&= IEEE80211_SCTL_SEQ
;
512 hdr
->seq_ctrl
&= cpu_to_le16(IEEE80211_SCTL_FRAG
);
513 hdr
->seq_ctrl
|= cpu_to_le16(seq_number
);
515 is_ampdu
= info
->flags
& IEEE80211_TX_CTL_AMPDU
;
518 /* Copy MAC header from skb into command buffer */
519 memcpy(tx_cmd
->hdr
, hdr
, hdrlen
);
521 WARN_ON_ONCE(info
->flags
& IEEE80211_TX_CTL_SEND_AFTER_DTIM
);
524 /* default to TID 0 for non-QoS packets */
525 u8 tdls_tid
= tid
== IWL_MAX_TID_COUNT
? 0 : tid
;
527 txq_id
= mvmsta
->hw_queue
[tid_to_mac80211_ac
[tdls_tid
]];
531 if (WARN_ON_ONCE(mvmsta
->tid_data
[tid
].state
!= IWL_AGG_ON
))
532 goto drop_unlock_sta
;
533 txq_id
= mvmsta
->tid_data
[tid
].txq_id
;
536 IWL_DEBUG_TX(mvm
, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta
->sta_id
,
537 tid
, txq_id
, IEEE80211_SEQ_TO_SN(seq_number
));
539 if (iwl_trans_tx(mvm
->trans
, skb
, dev_cmd
, txq_id
))
540 goto drop_unlock_sta
;
542 if (is_data_qos
&& !ieee80211_has_morefrags(fc
))
543 mvmsta
->tid_data
[tid
].seq_number
= seq_number
+ 0x10;
545 spin_unlock(&mvmsta
->lock
);
547 if (txq_id
< mvm
->first_agg_queue
)
548 atomic_inc(&mvm
->pending_frames
[mvmsta
->sta_id
]);
553 iwl_trans_free_tx_cmd(mvm
->trans
, dev_cmd
);
554 spin_unlock(&mvmsta
->lock
);
559 int iwl_mvm_tx_skb(struct iwl_mvm
*mvm
, struct sk_buff
*skb
,
560 struct ieee80211_sta
*sta
)
562 struct iwl_mvm_sta
*mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
563 struct sk_buff_head mpdus_skbs
;
564 unsigned int payload_len
;
567 if (WARN_ON_ONCE(!mvmsta
))
570 if (WARN_ON_ONCE(mvmsta
->sta_id
== IWL_MVM_STATION_COUNT
))
573 if (!skb_is_gso(skb
))
574 return iwl_mvm_tx_mpdu(mvm
, skb
, sta
);
576 payload_len
= skb_tail_pointer(skb
) - skb_transport_header(skb
) -
577 tcp_hdrlen(skb
) + skb
->data_len
;
579 if (payload_len
<= skb_shinfo(skb
)->gso_size
)
580 return iwl_mvm_tx_mpdu(mvm
, skb
, sta
);
582 __skb_queue_head_init(&mpdus_skbs
);
584 ret
= iwl_mvm_tx_tso(mvm
, skb
, sta
, &mpdus_skbs
);
588 if (WARN_ON(skb_queue_empty(&mpdus_skbs
)))
591 while (!skb_queue_empty(&mpdus_skbs
)) {
592 struct sk_buff
*skb
= __skb_dequeue(&mpdus_skbs
);
594 ret
= iwl_mvm_tx_mpdu(mvm
, skb
, sta
);
596 __skb_queue_purge(&mpdus_skbs
);
604 static void iwl_mvm_check_ratid_empty(struct iwl_mvm
*mvm
,
605 struct ieee80211_sta
*sta
, u8 tid
)
607 struct iwl_mvm_sta
*mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
608 struct iwl_mvm_tid_data
*tid_data
= &mvmsta
->tid_data
[tid
];
609 struct ieee80211_vif
*vif
= mvmsta
->vif
;
611 lockdep_assert_held(&mvmsta
->lock
);
613 if ((tid_data
->state
== IWL_AGG_ON
||
614 tid_data
->state
== IWL_EMPTYING_HW_QUEUE_DELBA
) &&
615 iwl_mvm_tid_queued(tid_data
) == 0) {
617 * Now that this aggregation queue is empty tell mac80211 so it
618 * knows we no longer have frames buffered for the station on
619 * this TID (for the TIM bitmap calculation.)
621 ieee80211_sta_set_buffered(sta
, tid
, false);
624 if (tid_data
->ssn
!= tid_data
->next_reclaimed
)
627 switch (tid_data
->state
) {
628 case IWL_EMPTYING_HW_QUEUE_ADDBA
:
629 IWL_DEBUG_TX_QUEUES(mvm
,
630 "Can continue addBA flow ssn = next_recl = %d\n",
631 tid_data
->next_reclaimed
);
632 tid_data
->state
= IWL_AGG_STARTING
;
633 ieee80211_start_tx_ba_cb_irqsafe(vif
, sta
->addr
, tid
);
636 case IWL_EMPTYING_HW_QUEUE_DELBA
:
637 IWL_DEBUG_TX_QUEUES(mvm
,
638 "Can continue DELBA flow ssn = next_recl = %d\n",
639 tid_data
->next_reclaimed
);
640 iwl_mvm_disable_txq(mvm
, tid_data
->txq_id
,
641 vif
->hw_queue
[tid_to_mac80211_ac
[tid
]], tid
,
643 tid_data
->state
= IWL_AGG_OFF
;
644 ieee80211_stop_tx_ba_cb_irqsafe(vif
, sta
->addr
, tid
);
652 #ifdef CONFIG_IWLWIFI_DEBUG
653 const char *iwl_mvm_get_tx_fail_reason(u32 status
)
655 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
656 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
658 switch (status
& TX_STATUS_MSK
) {
659 case TX_STATUS_SUCCESS
:
661 TX_STATUS_POSTPONE(DELAY
);
662 TX_STATUS_POSTPONE(FEW_BYTES
);
663 TX_STATUS_POSTPONE(BT_PRIO
);
664 TX_STATUS_POSTPONE(QUIET_PERIOD
);
665 TX_STATUS_POSTPONE(CALC_TTAK
);
666 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY
);
667 TX_STATUS_FAIL(SHORT_LIMIT
);
668 TX_STATUS_FAIL(LONG_LIMIT
);
669 TX_STATUS_FAIL(UNDERRUN
);
670 TX_STATUS_FAIL(DRAIN_FLOW
);
671 TX_STATUS_FAIL(RFKILL_FLUSH
);
672 TX_STATUS_FAIL(LIFE_EXPIRE
);
673 TX_STATUS_FAIL(DEST_PS
);
674 TX_STATUS_FAIL(HOST_ABORTED
);
675 TX_STATUS_FAIL(BT_RETRY
);
676 TX_STATUS_FAIL(STA_INVALID
);
677 TX_STATUS_FAIL(FRAG_DROPPED
);
678 TX_STATUS_FAIL(TID_DISABLE
);
679 TX_STATUS_FAIL(FIFO_FLUSHED
);
680 TX_STATUS_FAIL(SMALL_CF_POLL
);
681 TX_STATUS_FAIL(FW_DROP
);
682 TX_STATUS_FAIL(STA_COLOR_MISMATCH
);
687 #undef TX_STATUS_FAIL
688 #undef TX_STATUS_POSTPONE
690 #endif /* CONFIG_IWLWIFI_DEBUG */
692 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags
,
693 enum ieee80211_band band
,
694 struct ieee80211_tx_rate
*r
)
696 if (rate_n_flags
& RATE_HT_MCS_GF_MSK
)
697 r
->flags
|= IEEE80211_TX_RC_GREEN_FIELD
;
698 switch (rate_n_flags
& RATE_MCS_CHAN_WIDTH_MSK
) {
699 case RATE_MCS_CHAN_WIDTH_20
:
701 case RATE_MCS_CHAN_WIDTH_40
:
702 r
->flags
|= IEEE80211_TX_RC_40_MHZ_WIDTH
;
704 case RATE_MCS_CHAN_WIDTH_80
:
705 r
->flags
|= IEEE80211_TX_RC_80_MHZ_WIDTH
;
707 case RATE_MCS_CHAN_WIDTH_160
:
708 r
->flags
|= IEEE80211_TX_RC_160_MHZ_WIDTH
;
711 if (rate_n_flags
& RATE_MCS_SGI_MSK
)
712 r
->flags
|= IEEE80211_TX_RC_SHORT_GI
;
713 if (rate_n_flags
& RATE_MCS_HT_MSK
) {
714 r
->flags
|= IEEE80211_TX_RC_MCS
;
715 r
->idx
= rate_n_flags
& RATE_HT_MCS_INDEX_MSK
;
716 } else if (rate_n_flags
& RATE_MCS_VHT_MSK
) {
717 ieee80211_rate_set_vht(
718 r
, rate_n_flags
& RATE_VHT_MCS_RATE_CODE_MSK
,
719 ((rate_n_flags
& RATE_VHT_MCS_NSS_MSK
) >>
720 RATE_VHT_MCS_NSS_POS
) + 1);
721 r
->flags
|= IEEE80211_TX_RC_VHT_MCS
;
723 r
->idx
= iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags
,
729 * translate ucode response to mac80211 tx status control values
731 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags
,
732 struct ieee80211_tx_info
*info
)
734 struct ieee80211_tx_rate
*r
= &info
->status
.rates
[0];
736 info
->status
.antenna
=
737 ((rate_n_flags
& RATE_MCS_ANT_ABC_MSK
) >> RATE_MCS_ANT_POS
);
738 iwl_mvm_hwrate_to_tx_rate(rate_n_flags
, info
->band
, r
);
741 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm
*mvm
,
744 struct iwl_fw_dbg_trigger_tlv
*trig
;
745 struct iwl_fw_dbg_trigger_tx_status
*status_trig
;
748 if (!iwl_fw_dbg_trigger_enabled(mvm
->fw
, FW_DBG_TRIGGER_TX_STATUS
))
751 trig
= iwl_fw_dbg_get_trigger(mvm
->fw
, FW_DBG_TRIGGER_TX_STATUS
);
752 status_trig
= (void *)trig
->data
;
754 if (!iwl_fw_dbg_trigger_check_stop(mvm
, NULL
, trig
))
757 for (i
= 0; i
< ARRAY_SIZE(status_trig
->statuses
); i
++) {
758 /* don't collect on status 0 */
759 if (!status_trig
->statuses
[i
].status
)
762 if (status_trig
->statuses
[i
].status
!= (status
& TX_STATUS_MSK
))
765 iwl_mvm_fw_dbg_collect_trig(mvm
, trig
,
766 "Tx status %d was received",
767 status
& TX_STATUS_MSK
);
772 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm
*mvm
,
773 struct iwl_rx_packet
*pkt
)
775 struct ieee80211_sta
*sta
;
776 u16 sequence
= le16_to_cpu(pkt
->hdr
.sequence
);
777 int txq_id
= SEQ_TO_QUEUE(sequence
);
778 struct iwl_mvm_tx_resp
*tx_resp
= (void *)pkt
->data
;
779 int sta_id
= IWL_MVM_TX_RES_GET_RA(tx_resp
->ra_tid
);
780 int tid
= IWL_MVM_TX_RES_GET_TID(tx_resp
->ra_tid
);
781 u32 status
= le16_to_cpu(tx_resp
->status
.status
);
782 u16 ssn
= iwl_mvm_get_scd_ssn(tx_resp
);
783 struct iwl_mvm_sta
*mvmsta
;
784 struct sk_buff_head skbs
;
786 u16 next_reclaimed
, seq_ctl
;
788 __skb_queue_head_init(&skbs
);
790 seq_ctl
= le16_to_cpu(tx_resp
->seq_ctl
);
792 /* we can free until ssn % q.n_bd not inclusive */
793 iwl_trans_reclaim(mvm
->trans
, txq_id
, ssn
, &skbs
);
795 while (!skb_queue_empty(&skbs
)) {
796 struct sk_buff
*skb
= __skb_dequeue(&skbs
);
797 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
801 iwl_trans_free_tx_cmd(mvm
->trans
, info
->driver_data
[1]);
803 memset(&info
->status
, 0, sizeof(info
->status
));
805 info
->flags
&= ~IEEE80211_TX_CTL_AMPDU
;
807 /* inform mac80211 about what happened with the frame */
808 switch (status
& TX_STATUS_MSK
) {
809 case TX_STATUS_SUCCESS
:
810 case TX_STATUS_DIRECT_DONE
:
811 info
->flags
|= IEEE80211_TX_STAT_ACK
;
813 case TX_STATUS_FAIL_DEST_PS
:
814 info
->flags
|= IEEE80211_TX_STAT_TX_FILTERED
;
820 iwl_mvm_tx_status_check_trigger(mvm
, status
);
822 info
->status
.rates
[0].count
= tx_resp
->failure_frame
+ 1;
823 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp
->initial_rate
),
825 info
->status
.status_driver_data
[1] =
826 (void *)(uintptr_t)le32_to_cpu(tx_resp
->initial_rate
);
828 /* Single frame failure in an AMPDU queue => send BAR */
829 if (txq_id
>= mvm
->first_agg_queue
&&
830 !(info
->flags
& IEEE80211_TX_STAT_ACK
) &&
831 !(info
->flags
& IEEE80211_TX_STAT_TX_FILTERED
))
832 info
->flags
|= IEEE80211_TX_STAT_AMPDU_NO_BACK
;
834 /* W/A FW bug: seq_ctl is wrong when the status isn't success */
835 if (status
!= TX_STATUS_SUCCESS
) {
836 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
837 seq_ctl
= le16_to_cpu(hdr
->seq_ctrl
);
841 * TODO: this is not accurate if we are freeing more than one
844 info
->status
.tx_time
=
845 le16_to_cpu(tx_resp
->wireless_media_time
);
846 BUILD_BUG_ON(ARRAY_SIZE(info
->status
.status_driver_data
) < 1);
847 info
->status
.status_driver_data
[0] =
848 (void *)(uintptr_t)tx_resp
->reduced_tpc
;
850 ieee80211_tx_status(mvm
->hw
, skb
);
853 if (txq_id
>= mvm
->first_agg_queue
) {
854 /* If this is an aggregation queue, we use the ssn since:
855 * ssn = wifi seq_num % 256.
856 * The seq_ctl is the sequence control of the packet to which
857 * this Tx response relates. But if there is a hole in the
858 * bitmap of the BA we received, this Tx response may allow to
859 * reclaim the hole and all the subsequent packets that were
860 * already acked. In that case, seq_ctl != ssn, and the next
861 * packet to be reclaimed will be ssn and not seq_ctl. In that
862 * case, several packets will be reclaimed even if
865 * The ssn is the index (% 256) of the latest packet that has
866 * treated (acked / dropped) + 1.
868 next_reclaimed
= ssn
;
870 /* The next packet to be reclaimed is the one after this one */
871 next_reclaimed
= IEEE80211_SEQ_TO_SN(seq_ctl
+ 0x10);
874 IWL_DEBUG_TX_REPLY(mvm
,
875 "TXQ %d status %s (0x%08x)\n",
876 txq_id
, iwl_mvm_get_tx_fail_reason(status
), status
);
878 IWL_DEBUG_TX_REPLY(mvm
,
879 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
880 le32_to_cpu(tx_resp
->initial_rate
),
881 tx_resp
->failure_frame
, SEQ_TO_INDEX(sequence
),
882 ssn
, next_reclaimed
, seq_ctl
);
886 sta
= rcu_dereference(mvm
->fw_id_to_mac_id
[sta_id
]);
888 * sta can't be NULL otherwise it'd mean that the sta has been freed in
889 * the firmware while we still have packets for it in the Tx queues.
891 if (WARN_ON_ONCE(!sta
))
895 mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
897 if (tid
!= IWL_TID_NON_QOS
) {
898 struct iwl_mvm_tid_data
*tid_data
=
899 &mvmsta
->tid_data
[tid
];
900 bool send_eosp_ndp
= false;
902 spin_lock_bh(&mvmsta
->lock
);
903 tid_data
->next_reclaimed
= next_reclaimed
;
904 IWL_DEBUG_TX_REPLY(mvm
, "Next reclaimed packet:%d\n",
906 iwl_mvm_check_ratid_empty(mvm
, sta
, tid
);
908 if (mvmsta
->sleep_tx_count
) {
909 mvmsta
->sleep_tx_count
--;
910 if (mvmsta
->sleep_tx_count
&&
911 !iwl_mvm_tid_queued(tid_data
)) {
913 * The number of frames in the queue
914 * dropped to 0 even if we sent less
915 * frames than we thought we had on the
917 * This means we had holes in the BA
918 * window that we just filled, ask
919 * mac80211 to send EOSP since the
920 * firmware won't know how to do that.
921 * Send NDP and the firmware will send
922 * EOSP notification that will trigger
923 * a call to ieee80211_sta_eosp().
925 send_eosp_ndp
= true;
929 spin_unlock_bh(&mvmsta
->lock
);
931 iwl_mvm_sta_modify_sleep_tx_count(mvm
, sta
,
932 IEEE80211_FRAME_RELEASE_UAPSD
,
933 1, tid
, false, false);
934 mvmsta
->sleep_tx_count
= 0;
935 ieee80211_send_eosp_nullfunc(sta
, tid
);
939 if (mvmsta
->next_status_eosp
) {
940 mvmsta
->next_status_eosp
= false;
941 ieee80211_sta_eosp(sta
);
948 * If the txq is not an AMPDU queue, there is no chance we freed
949 * several skbs. Check that out...
951 if (txq_id
>= mvm
->first_agg_queue
)
954 /* We can't free more than one frame at once on a shared queue */
955 WARN_ON(skb_freed
> 1);
957 /* If we have still frames for this STA nothing to do here */
958 if (!atomic_sub_and_test(skb_freed
, &mvm
->pending_frames
[sta_id
]))
961 if (mvmsta
&& mvmsta
->vif
->type
== NL80211_IFTYPE_AP
) {
964 * If there are no pending frames for this STA and
965 * the tx to this station is not disabled, notify
966 * mac80211 that this station can now wake up in its
968 * If mvmsta is not NULL, sta is valid.
971 spin_lock_bh(&mvmsta
->lock
);
973 if (!mvmsta
->disable_tx
)
974 ieee80211_sta_block_awake(mvm
->hw
, sta
, false);
976 spin_unlock_bh(&mvmsta
->lock
);
979 if (PTR_ERR(sta
) == -EBUSY
|| PTR_ERR(sta
) == -ENOENT
) {
981 * We are draining and this was the last packet - pre_rcu_remove
982 * has been called already. We might be after the
983 * synchronize_net already.
984 * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues.
986 set_bit(sta_id
, mvm
->sta_drained
);
987 schedule_work(&mvm
->sta_drained_wk
);
994 #ifdef CONFIG_IWLWIFI_DEBUG
995 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
996 static const char *iwl_get_agg_tx_status(u16 status
)
998 switch (status
& AGG_TX_STATE_STATUS_MSK
) {
999 AGG_TX_STATE_(TRANSMITTED
);
1000 AGG_TX_STATE_(UNDERRUN
);
1001 AGG_TX_STATE_(BT_PRIO
);
1002 AGG_TX_STATE_(FEW_BYTES
);
1003 AGG_TX_STATE_(ABORT
);
1004 AGG_TX_STATE_(LAST_SENT_TTL
);
1005 AGG_TX_STATE_(LAST_SENT_TRY_CNT
);
1006 AGG_TX_STATE_(LAST_SENT_BT_KILL
);
1007 AGG_TX_STATE_(SCD_QUERY
);
1008 AGG_TX_STATE_(TEST_BAD_CRC32
);
1009 AGG_TX_STATE_(RESPONSE
);
1010 AGG_TX_STATE_(DUMP_TX
);
1011 AGG_TX_STATE_(DELAY_TX
);
1017 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm
*mvm
,
1018 struct iwl_rx_packet
*pkt
)
1020 struct iwl_mvm_tx_resp
*tx_resp
= (void *)pkt
->data
;
1021 struct agg_tx_status
*frame_status
= &tx_resp
->status
;
1024 for (i
= 0; i
< tx_resp
->frame_count
; i
++) {
1025 u16 fstatus
= le16_to_cpu(frame_status
[i
].status
);
1027 IWL_DEBUG_TX_REPLY(mvm
,
1028 "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
1029 iwl_get_agg_tx_status(fstatus
),
1030 fstatus
& AGG_TX_STATE_STATUS_MSK
,
1031 (fstatus
& AGG_TX_STATE_TRY_CNT_MSK
) >>
1032 AGG_TX_STATE_TRY_CNT_POS
,
1033 le16_to_cpu(frame_status
[i
].sequence
));
1037 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm
*mvm
,
1038 struct iwl_rx_packet
*pkt
)
1040 #endif /* CONFIG_IWLWIFI_DEBUG */
1042 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm
*mvm
,
1043 struct iwl_rx_packet
*pkt
)
1045 struct iwl_mvm_tx_resp
*tx_resp
= (void *)pkt
->data
;
1046 int sta_id
= IWL_MVM_TX_RES_GET_RA(tx_resp
->ra_tid
);
1047 int tid
= IWL_MVM_TX_RES_GET_TID(tx_resp
->ra_tid
);
1048 u16 sequence
= le16_to_cpu(pkt
->hdr
.sequence
);
1049 struct ieee80211_sta
*sta
;
1051 if (WARN_ON_ONCE(SEQ_TO_QUEUE(sequence
) < mvm
->first_agg_queue
))
1054 if (WARN_ON_ONCE(tid
== IWL_TID_NON_QOS
))
1057 iwl_mvm_rx_tx_cmd_agg_dbg(mvm
, pkt
);
1061 sta
= rcu_dereference(mvm
->fw_id_to_mac_id
[sta_id
]);
1063 if (!WARN_ON_ONCE(IS_ERR_OR_NULL(sta
))) {
1064 struct iwl_mvm_sta
*mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
1065 mvmsta
->tid_data
[tid
].rate_n_flags
=
1066 le32_to_cpu(tx_resp
->initial_rate
);
1067 mvmsta
->tid_data
[tid
].tx_time
=
1068 le16_to_cpu(tx_resp
->wireless_media_time
);
1074 void iwl_mvm_rx_tx_cmd(struct iwl_mvm
*mvm
, struct iwl_rx_cmd_buffer
*rxb
)
1076 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
1077 struct iwl_mvm_tx_resp
*tx_resp
= (void *)pkt
->data
;
1079 if (tx_resp
->frame_count
== 1)
1080 iwl_mvm_rx_tx_cmd_single(mvm
, pkt
);
1082 iwl_mvm_rx_tx_cmd_agg(mvm
, pkt
);
1085 static void iwl_mvm_tx_info_from_ba_notif(struct ieee80211_tx_info
*info
,
1086 struct iwl_mvm_ba_notif
*ba_notif
,
1087 struct iwl_mvm_tid_data
*tid_data
)
1089 info
->flags
|= IEEE80211_TX_STAT_AMPDU
;
1090 info
->status
.ampdu_ack_len
= ba_notif
->txed_2_done
;
1091 info
->status
.ampdu_len
= ba_notif
->txed
;
1092 iwl_mvm_hwrate_to_tx_status(tid_data
->rate_n_flags
,
1094 /* TODO: not accounted if the whole A-MPDU failed */
1095 info
->status
.tx_time
= tid_data
->tx_time
;
1096 info
->status
.status_driver_data
[0] =
1097 (void *)(uintptr_t)ba_notif
->reduced_txp
;
1098 info
->status
.status_driver_data
[1] =
1099 (void *)(uintptr_t)tid_data
->rate_n_flags
;
1102 void iwl_mvm_rx_ba_notif(struct iwl_mvm
*mvm
, struct iwl_rx_cmd_buffer
*rxb
)
1104 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
1105 struct iwl_mvm_ba_notif
*ba_notif
= (void *)pkt
->data
;
1106 struct sk_buff_head reclaimed_skbs
;
1107 struct iwl_mvm_tid_data
*tid_data
;
1108 struct ieee80211_sta
*sta
;
1109 struct iwl_mvm_sta
*mvmsta
;
1110 struct sk_buff
*skb
;
1111 int sta_id
, tid
, freed
;
1112 /* "flow" corresponds to Tx queue */
1113 u16 scd_flow
= le16_to_cpu(ba_notif
->scd_flow
);
1114 /* "ssn" is start of block-ack Tx window, corresponds to index
1115 * (in Tx queue's circular buffer) of first TFD/frame in window */
1116 u16 ba_resp_scd_ssn
= le16_to_cpu(ba_notif
->scd_ssn
);
1118 sta_id
= ba_notif
->sta_id
;
1119 tid
= ba_notif
->tid
;
1121 if (WARN_ONCE(sta_id
>= IWL_MVM_STATION_COUNT
||
1122 tid
>= IWL_MAX_TID_COUNT
,
1123 "sta_id %d tid %d", sta_id
, tid
))
1128 sta
= rcu_dereference(mvm
->fw_id_to_mac_id
[sta_id
]);
1130 /* Reclaiming frames for a station that has been deleted ? */
1131 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta
))) {
1136 mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
1137 tid_data
= &mvmsta
->tid_data
[tid
];
1139 if (tid_data
->txq_id
!= scd_flow
) {
1141 "invalid BA notification: Q %d, tid %d, flow %d\n",
1142 tid_data
->txq_id
, tid
, scd_flow
);
1147 spin_lock_bh(&mvmsta
->lock
);
1149 __skb_queue_head_init(&reclaimed_skbs
);
1152 * Release all TFDs before the SSN, i.e. all TFDs in front of
1153 * block-ack window (we assume that they've been successfully
1154 * transmitted ... if not, it's too late anyway).
1156 iwl_trans_reclaim(mvm
->trans
, scd_flow
, ba_resp_scd_ssn
,
1159 IWL_DEBUG_TX_REPLY(mvm
,
1160 "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
1161 (u8
*)&ba_notif
->sta_addr_lo32
,
1163 IWL_DEBUG_TX_REPLY(mvm
,
1164 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1165 ba_notif
->tid
, le16_to_cpu(ba_notif
->seq_ctl
),
1166 (unsigned long long)le64_to_cpu(ba_notif
->bitmap
),
1167 scd_flow
, ba_resp_scd_ssn
, ba_notif
->txed
,
1168 ba_notif
->txed_2_done
);
1170 IWL_DEBUG_TX_REPLY(mvm
, "reduced txp from ba notif %d\n",
1171 ba_notif
->reduced_txp
);
1172 tid_data
->next_reclaimed
= ba_resp_scd_ssn
;
1174 iwl_mvm_check_ratid_empty(mvm
, sta
, tid
);
1178 skb_queue_walk(&reclaimed_skbs
, skb
) {
1179 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
1180 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1182 if (ieee80211_is_data_qos(hdr
->frame_control
))
1187 iwl_trans_free_tx_cmd(mvm
->trans
, info
->driver_data
[1]);
1189 memset(&info
->status
, 0, sizeof(info
->status
));
1190 /* Packet was transmitted successfully, failures come as single
1191 * frames because before failing a frame the firmware transmits
1192 * it without aggregation at least once.
1194 info
->flags
|= IEEE80211_TX_STAT_ACK
;
1196 /* this is the first skb we deliver in this batch */
1197 /* put the rate scaling data there */
1199 iwl_mvm_tx_info_from_ba_notif(info
, ba_notif
, tid_data
);
1202 spin_unlock_bh(&mvmsta
->lock
);
1204 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
1205 * possible (i.e. first MPDU in the aggregation wasn't acked)
1206 * Still it's important to update RS about sent vs. acked.
1208 if (skb_queue_empty(&reclaimed_skbs
)) {
1209 struct ieee80211_tx_info ba_info
= {};
1210 struct ieee80211_chanctx_conf
*chanctx_conf
= NULL
;
1214 rcu_dereference(mvmsta
->vif
->chanctx_conf
);
1216 if (WARN_ON_ONCE(!chanctx_conf
))
1219 ba_info
.band
= chanctx_conf
->def
.chan
->band
;
1220 iwl_mvm_tx_info_from_ba_notif(&ba_info
, ba_notif
, tid_data
);
1222 IWL_DEBUG_TX_REPLY(mvm
, "No reclaim. Update rs directly\n");
1223 iwl_mvm_rs_tx_status(mvm
, sta
, tid
, &ba_info
);
1229 while (!skb_queue_empty(&reclaimed_skbs
)) {
1230 skb
= __skb_dequeue(&reclaimed_skbs
);
1231 ieee80211_tx_status(mvm
->hw
, skb
);
1236 * Note that there are transports that buffer frames before they reach
1237 * the firmware. This means that after flush_tx_path is called, the
1238 * queue might not be empty. The race-free way to handle this is to:
1239 * 1) set the station as draining
1240 * 2) flush the Tx path
1241 * 3) wait for the transport queues to be empty
1243 int iwl_mvm_flush_tx_path(struct iwl_mvm
*mvm
, u32 tfd_msk
, u32 flags
)
1246 struct iwl_tx_path_flush_cmd flush_cmd
= {
1247 .queues_ctl
= cpu_to_le32(tfd_msk
),
1248 .flush_ctl
= cpu_to_le16(DUMP_TX_FIFO_FLUSH
),
1251 ret
= iwl_mvm_send_cmd_pdu(mvm
, TXPATH_FLUSH
, flags
,
1252 sizeof(flush_cmd
), &flush_cmd
);
1254 IWL_ERR(mvm
, "Failed to send flush command (%d)\n", ret
);