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 <ilw@linux.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>
68 #include "iwl-trans.h"
69 #include "iwl-eeprom-parse.h"
74 iwl_mvm_bar_check_trigger(struct iwl_mvm
*mvm
, const u8
*addr
,
77 struct iwl_fw_dbg_trigger_tlv
*trig
;
78 struct iwl_fw_dbg_trigger_ba
*ba_trig
;
80 if (!iwl_fw_dbg_trigger_enabled(mvm
->fw
, FW_DBG_TRIGGER_BA
))
83 trig
= iwl_fw_dbg_get_trigger(mvm
->fw
, FW_DBG_TRIGGER_BA
);
84 ba_trig
= (void *)trig
->data
;
86 if (!iwl_fw_dbg_trigger_check_stop(mvm
, NULL
, trig
))
89 if (!(le16_to_cpu(ba_trig
->tx_bar
) & BIT(tid
)))
92 iwl_mvm_fw_dbg_collect_trig(mvm
, trig
,
93 "BAR sent to %pM, tid %d, ssn %d",
98 * Sets most of the Tx cmd's fields
100 void iwl_mvm_set_tx_cmd(struct iwl_mvm
*mvm
, struct sk_buff
*skb
,
101 struct iwl_tx_cmd
*tx_cmd
,
102 struct ieee80211_tx_info
*info
, u8 sta_id
)
104 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
105 __le16 fc
= hdr
->frame_control
;
106 u32 tx_flags
= le32_to_cpu(tx_cmd
->tx_flags
);
107 u32 len
= skb
->len
+ FCS_LEN
;
110 if (!(info
->flags
& IEEE80211_TX_CTL_NO_ACK
))
111 tx_flags
|= TX_CMD_FLG_ACK
;
113 tx_flags
&= ~TX_CMD_FLG_ACK
;
115 if (ieee80211_is_probe_resp(fc
))
116 tx_flags
|= TX_CMD_FLG_TSF
;
118 if (ieee80211_has_morefrags(fc
))
119 tx_flags
|= TX_CMD_FLG_MORE_FRAG
;
121 if (ieee80211_is_data_qos(fc
)) {
122 u8
*qc
= ieee80211_get_qos_ctl(hdr
);
123 tx_cmd
->tid_tspec
= qc
[0] & 0xf;
124 tx_flags
&= ~TX_CMD_FLG_SEQ_CTL
;
125 } else if (ieee80211_is_back_req(fc
)) {
126 struct ieee80211_bar
*bar
= (void *)skb
->data
;
127 u16 control
= le16_to_cpu(bar
->control
);
128 u16 ssn
= le16_to_cpu(bar
->start_seq_num
);
130 tx_flags
|= TX_CMD_FLG_ACK
| TX_CMD_FLG_BAR
;
131 tx_cmd
->tid_tspec
= (control
&
132 IEEE80211_BAR_CTRL_TID_INFO_MASK
) >>
133 IEEE80211_BAR_CTRL_TID_INFO_SHIFT
;
134 WARN_ON_ONCE(tx_cmd
->tid_tspec
>= IWL_MAX_TID_COUNT
);
135 iwl_mvm_bar_check_trigger(mvm
, bar
->ra
, tx_cmd
->tid_tspec
,
138 tx_cmd
->tid_tspec
= IWL_TID_NON_QOS
;
139 if (info
->flags
& IEEE80211_TX_CTL_ASSIGN_SEQ
)
140 tx_flags
|= TX_CMD_FLG_SEQ_CTL
;
142 tx_flags
&= ~TX_CMD_FLG_SEQ_CTL
;
145 /* Default to 0 (BE) when tid_spec is set to IWL_TID_NON_QOS */
146 if (tx_cmd
->tid_tspec
< IWL_MAX_TID_COUNT
)
147 ac
= tid_to_mac80211_ac
[tx_cmd
->tid_tspec
];
149 ac
= tid_to_mac80211_ac
[0];
151 tx_flags
|= iwl_mvm_bt_coex_tx_prio(mvm
, hdr
, info
, ac
) <<
152 TX_CMD_FLG_BT_PRIO_POS
;
154 if (ieee80211_is_mgmt(fc
)) {
155 if (ieee80211_is_assoc_req(fc
) || ieee80211_is_reassoc_req(fc
))
156 tx_cmd
->pm_frame_timeout
= cpu_to_le16(3);
158 tx_cmd
->pm_frame_timeout
= cpu_to_le16(2);
160 /* The spec allows Action frames in A-MPDU, we don't support
163 WARN_ON_ONCE(info
->flags
& IEEE80211_TX_CTL_AMPDU
);
164 } else if (info
->control
.flags
& IEEE80211_TX_CTRL_PORT_CTRL_PROTO
) {
165 tx_cmd
->pm_frame_timeout
= cpu_to_le16(2);
167 tx_cmd
->pm_frame_timeout
= 0;
170 if (ieee80211_is_data(fc
) && len
> mvm
->rts_threshold
&&
171 !is_multicast_ether_addr(ieee80211_get_DA(hdr
)))
172 tx_flags
|= TX_CMD_FLG_PROT_REQUIRE
;
174 if (fw_has_capa(&mvm
->fw
->ucode_capa
,
175 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT
) &&
176 ieee80211_action_contains_tpc(skb
))
177 tx_flags
|= TX_CMD_FLG_WRITE_TX_POWER
;
179 tx_cmd
->tx_flags
= cpu_to_le32(tx_flags
);
180 /* Total # bytes to be transmitted */
181 tx_cmd
->len
= cpu_to_le16((u16
)skb
->len
);
182 tx_cmd
->next_frame_len
= 0;
183 tx_cmd
->life_time
= cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE
);
184 tx_cmd
->sta_id
= sta_id
;
188 * Sets the fields in the Tx cmd that are rate related
190 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm
*mvm
, struct iwl_tx_cmd
*tx_cmd
,
191 struct ieee80211_tx_info
*info
,
192 struct ieee80211_sta
*sta
, __le16 fc
)
198 /* Set retry limit on RTS packets */
199 tx_cmd
->rts_retry_limit
= IWL_RTS_DFAULT_RETRY_LIMIT
;
201 /* Set retry limit on DATA packets and Probe Responses*/
202 if (ieee80211_is_probe_resp(fc
)) {
203 tx_cmd
->data_retry_limit
= IWL_MGMT_DFAULT_RETRY_LIMIT
;
204 tx_cmd
->rts_retry_limit
=
205 min(tx_cmd
->data_retry_limit
, tx_cmd
->rts_retry_limit
);
206 } else if (ieee80211_is_back_req(fc
)) {
207 tx_cmd
->data_retry_limit
= IWL_BAR_DFAULT_RETRY_LIMIT
;
209 tx_cmd
->data_retry_limit
= IWL_DEFAULT_TX_RETRY
;
213 * for data packets, rate info comes from the table inside the fw. This
214 * table is controlled by LINK_QUALITY commands
217 if (ieee80211_is_data(fc
) && sta
) {
218 tx_cmd
->initial_rate_index
= 0;
219 tx_cmd
->tx_flags
|= cpu_to_le32(TX_CMD_FLG_STA_RATE
);
221 } else if (ieee80211_is_back_req(fc
)) {
223 cpu_to_le32(TX_CMD_FLG_ACK
| TX_CMD_FLG_BAR
);
226 /* HT rate doesn't make sense for a non data frame */
227 WARN_ONCE(info
->control
.rates
[0].flags
& IEEE80211_TX_RC_MCS
,
228 "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame (fc:0x%x)\n",
229 info
->control
.rates
[0].flags
,
230 info
->control
.rates
[0].idx
,
233 rate_idx
= info
->control
.rates
[0].idx
;
234 /* if the rate isn't a well known legacy rate, take the lowest one */
235 if (rate_idx
< 0 || rate_idx
> IWL_RATE_COUNT_LEGACY
)
236 rate_idx
= rate_lowest_index(
237 &mvm
->nvm_data
->bands
[info
->band
], sta
);
239 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
240 if (info
->band
== IEEE80211_BAND_5GHZ
)
241 rate_idx
+= IWL_FIRST_OFDM_RATE
;
243 /* For 2.4 GHZ band, check that there is no need to remap */
244 BUILD_BUG_ON(IWL_FIRST_CCK_RATE
!= 0);
246 /* Get PLCP rate for tx_cmd->rate_n_flags */
247 rate_plcp
= iwl_mvm_mac80211_idx_to_hwrate(rate_idx
);
249 mvm
->mgmt_last_antenna_idx
=
250 iwl_mvm_next_antenna(mvm
, iwl_mvm_get_valid_tx_ant(mvm
),
251 mvm
->mgmt_last_antenna_idx
);
253 if (info
->band
== IEEE80211_BAND_2GHZ
&&
254 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm
))
255 rate_flags
= BIT(mvm
->cfg
->non_shared_ant
) << RATE_MCS_ANT_POS
;
258 BIT(mvm
->mgmt_last_antenna_idx
) << RATE_MCS_ANT_POS
;
260 /* Set CCK flag as needed */
261 if ((rate_idx
>= IWL_FIRST_CCK_RATE
) && (rate_idx
<= IWL_LAST_CCK_RATE
))
262 rate_flags
|= RATE_MCS_CCK_MSK
;
264 /* Set the rate in the TX cmd */
265 tx_cmd
->rate_n_flags
= cpu_to_le32((u32
)rate_plcp
| rate_flags
);
269 * Sets the fields in the Tx cmd that are crypto related
271 void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm
*mvm
,
272 struct ieee80211_tx_info
*info
,
273 struct iwl_tx_cmd
*tx_cmd
,
274 struct sk_buff
*skb_frag
)
276 struct ieee80211_key_conf
*keyconf
= info
->control
.hw_key
;
278 switch (keyconf
->cipher
) {
279 case WLAN_CIPHER_SUITE_CCMP
:
280 tx_cmd
->sec_ctl
= TX_CMD_SEC_CCM
;
281 memcpy(tx_cmd
->key
, keyconf
->key
, keyconf
->keylen
);
282 if (info
->flags
& IEEE80211_TX_CTL_AMPDU
)
283 tx_cmd
->tx_flags
|= cpu_to_le32(TX_CMD_FLG_CCMP_AGG
);
286 case WLAN_CIPHER_SUITE_TKIP
:
287 tx_cmd
->sec_ctl
= TX_CMD_SEC_TKIP
;
288 ieee80211_get_tkip_p2k(keyconf
, skb_frag
, tx_cmd
->key
);
291 case WLAN_CIPHER_SUITE_WEP104
:
292 tx_cmd
->sec_ctl
|= TX_CMD_SEC_KEY128
;
294 case WLAN_CIPHER_SUITE_WEP40
:
295 tx_cmd
->sec_ctl
|= TX_CMD_SEC_WEP
|
296 ((keyconf
->keyidx
<< TX_CMD_SEC_WEP_KEY_IDX_POS
) &
297 TX_CMD_SEC_WEP_KEY_IDX_MSK
);
299 memcpy(&tx_cmd
->key
[3], keyconf
->key
, keyconf
->keylen
);
302 tx_cmd
->sec_ctl
|= TX_CMD_SEC_EXT
;
307 * Allocates and sets the Tx cmd the driver data pointers in the skb
309 static struct iwl_device_cmd
*
310 iwl_mvm_set_tx_params(struct iwl_mvm
*mvm
, struct sk_buff
*skb
,
311 struct ieee80211_sta
*sta
, u8 sta_id
)
313 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
314 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
315 struct iwl_device_cmd
*dev_cmd
;
316 struct iwl_tx_cmd
*tx_cmd
;
318 dev_cmd
= iwl_trans_alloc_tx_cmd(mvm
->trans
);
320 if (unlikely(!dev_cmd
))
323 memset(dev_cmd
, 0, sizeof(*dev_cmd
));
324 dev_cmd
->hdr
.cmd
= TX_CMD
;
325 tx_cmd
= (struct iwl_tx_cmd
*)dev_cmd
->payload
;
327 if (info
->control
.hw_key
)
328 iwl_mvm_set_tx_cmd_crypto(mvm
, info
, tx_cmd
, skb
);
330 iwl_mvm_set_tx_cmd(mvm
, skb
, tx_cmd
, info
, sta_id
);
332 iwl_mvm_set_tx_cmd_rate(mvm
, tx_cmd
, info
, sta
, hdr
->frame_control
);
334 memset(&info
->status
, 0, sizeof(info
->status
));
336 info
->driver_data
[0] = NULL
;
337 info
->driver_data
[1] = dev_cmd
;
342 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm
*mvm
, struct sk_buff
*skb
)
344 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
345 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
346 struct iwl_device_cmd
*dev_cmd
;
347 struct iwl_tx_cmd
*tx_cmd
;
350 if (WARN_ON_ONCE(info
->flags
& IEEE80211_TX_CTL_AMPDU
))
353 if (WARN_ON_ONCE(info
->flags
& IEEE80211_TX_CTL_SEND_AFTER_DTIM
&&
354 (!info
->control
.vif
||
355 info
->hw_queue
!= info
->control
.vif
->cab_queue
)))
359 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used
360 * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel
361 * queue. STATION (HS2.0) uses the auxiliary context of the FW,
362 * and hence needs to be sent on the aux queue
364 if (IEEE80211_SKB_CB(skb
)->hw_queue
== IWL_MVM_OFFCHANNEL_QUEUE
&&
365 info
->control
.vif
->type
== NL80211_IFTYPE_STATION
)
366 IEEE80211_SKB_CB(skb
)->hw_queue
= mvm
->aux_queue
;
369 * If the interface on which frame is sent is the P2P_DEVICE
370 * or an AP/GO interface use the broadcast station associated
371 * with it; otherwise use the AUX station.
373 if (info
->control
.vif
&&
374 (info
->control
.vif
->type
== NL80211_IFTYPE_P2P_DEVICE
||
375 info
->control
.vif
->type
== NL80211_IFTYPE_AP
)) {
376 struct iwl_mvm_vif
*mvmvif
=
377 iwl_mvm_vif_from_mac80211(info
->control
.vif
);
378 sta_id
= mvmvif
->bcast_sta
.sta_id
;
380 sta_id
= mvm
->aux_sta
.sta_id
;
383 IWL_DEBUG_TX(mvm
, "station Id %d, queue=%d\n", sta_id
, info
->hw_queue
);
385 dev_cmd
= iwl_mvm_set_tx_params(mvm
, skb
, NULL
, sta_id
);
389 /* From now on, we cannot access info->control */
390 tx_cmd
= (struct iwl_tx_cmd
*)dev_cmd
->payload
;
392 /* Copy MAC header from skb into command buffer */
393 memcpy(tx_cmd
->hdr
, hdr
, ieee80211_hdrlen(hdr
->frame_control
));
395 if (iwl_trans_tx(mvm
->trans
, skb
, dev_cmd
, info
->hw_queue
)) {
396 iwl_trans_free_tx_cmd(mvm
->trans
, dev_cmd
);
404 * Sets the fields in the Tx cmd that are crypto related
406 int iwl_mvm_tx_skb(struct iwl_mvm
*mvm
, struct sk_buff
*skb
,
407 struct ieee80211_sta
*sta
)
409 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
410 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
411 struct iwl_mvm_sta
*mvmsta
;
412 struct iwl_device_cmd
*dev_cmd
;
413 struct iwl_tx_cmd
*tx_cmd
;
416 u8 tid
= IWL_MAX_TID_COUNT
;
417 u8 txq_id
= info
->hw_queue
;
418 bool is_data_qos
= false, is_ampdu
= false;
420 mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
421 fc
= hdr
->frame_control
;
423 if (WARN_ON_ONCE(!mvmsta
))
426 if (WARN_ON_ONCE(mvmsta
->sta_id
== IWL_MVM_STATION_COUNT
))
429 dev_cmd
= iwl_mvm_set_tx_params(mvm
, skb
, sta
, mvmsta
->sta_id
);
433 tx_cmd
= (struct iwl_tx_cmd
*)dev_cmd
->payload
;
434 /* From now on, we cannot access info->control */
437 * we handle that entirely ourselves -- for uAPSD the firmware
438 * will always send a notification, and for PS-Poll responses
439 * we'll notify mac80211 when getting frame status
441 info
->flags
&= ~IEEE80211_TX_STATUS_EOSP
;
443 spin_lock(&mvmsta
->lock
);
445 if (ieee80211_is_data_qos(fc
) && !ieee80211_is_qos_nullfunc(fc
)) {
447 qc
= ieee80211_get_qos_ctl(hdr
);
448 tid
= qc
[0] & IEEE80211_QOS_CTL_TID_MASK
;
449 if (WARN_ON_ONCE(tid
>= IWL_MAX_TID_COUNT
))
450 goto drop_unlock_sta
;
452 seq_number
= mvmsta
->tid_data
[tid
].seq_number
;
453 seq_number
&= IEEE80211_SCTL_SEQ
;
454 hdr
->seq_ctrl
&= cpu_to_le16(IEEE80211_SCTL_FRAG
);
455 hdr
->seq_ctrl
|= cpu_to_le16(seq_number
);
457 is_ampdu
= info
->flags
& IEEE80211_TX_CTL_AMPDU
;
460 /* Copy MAC header from skb into command buffer */
461 memcpy(tx_cmd
->hdr
, hdr
, ieee80211_hdrlen(fc
));
463 WARN_ON_ONCE(info
->flags
& IEEE80211_TX_CTL_SEND_AFTER_DTIM
);
466 /* default to TID 0 for non-QoS packets */
467 u8 tdls_tid
= tid
== IWL_MAX_TID_COUNT
? 0 : tid
;
469 txq_id
= mvmsta
->hw_queue
[tid_to_mac80211_ac
[tdls_tid
]];
473 if (WARN_ON_ONCE(mvmsta
->tid_data
[tid
].state
!= IWL_AGG_ON
))
474 goto drop_unlock_sta
;
475 txq_id
= mvmsta
->tid_data
[tid
].txq_id
;
478 IWL_DEBUG_TX(mvm
, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta
->sta_id
,
479 tid
, txq_id
, IEEE80211_SEQ_TO_SN(seq_number
));
481 if (iwl_trans_tx(mvm
->trans
, skb
, dev_cmd
, txq_id
))
482 goto drop_unlock_sta
;
484 if (is_data_qos
&& !ieee80211_has_morefrags(fc
))
485 mvmsta
->tid_data
[tid
].seq_number
= seq_number
+ 0x10;
487 spin_unlock(&mvmsta
->lock
);
489 if (txq_id
< mvm
->first_agg_queue
)
490 atomic_inc(&mvm
->pending_frames
[mvmsta
->sta_id
]);
495 iwl_trans_free_tx_cmd(mvm
->trans
, dev_cmd
);
496 spin_unlock(&mvmsta
->lock
);
501 static void iwl_mvm_check_ratid_empty(struct iwl_mvm
*mvm
,
502 struct ieee80211_sta
*sta
, u8 tid
)
504 struct iwl_mvm_sta
*mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
505 struct iwl_mvm_tid_data
*tid_data
= &mvmsta
->tid_data
[tid
];
506 struct ieee80211_vif
*vif
= mvmsta
->vif
;
508 lockdep_assert_held(&mvmsta
->lock
);
510 if ((tid_data
->state
== IWL_AGG_ON
||
511 tid_data
->state
== IWL_EMPTYING_HW_QUEUE_DELBA
) &&
512 iwl_mvm_tid_queued(tid_data
) == 0) {
514 * Now that this aggregation queue is empty tell mac80211 so it
515 * knows we no longer have frames buffered for the station on
516 * this TID (for the TIM bitmap calculation.)
518 ieee80211_sta_set_buffered(sta
, tid
, false);
521 if (tid_data
->ssn
!= tid_data
->next_reclaimed
)
524 switch (tid_data
->state
) {
525 case IWL_EMPTYING_HW_QUEUE_ADDBA
:
526 IWL_DEBUG_TX_QUEUES(mvm
,
527 "Can continue addBA flow ssn = next_recl = %d\n",
528 tid_data
->next_reclaimed
);
529 tid_data
->state
= IWL_AGG_STARTING
;
530 ieee80211_start_tx_ba_cb_irqsafe(vif
, sta
->addr
, tid
);
533 case IWL_EMPTYING_HW_QUEUE_DELBA
:
534 IWL_DEBUG_TX_QUEUES(mvm
,
535 "Can continue DELBA flow ssn = next_recl = %d\n",
536 tid_data
->next_reclaimed
);
537 iwl_mvm_disable_txq(mvm
, tid_data
->txq_id
, CMD_ASYNC
);
538 tid_data
->state
= IWL_AGG_OFF
;
540 * we can't hold the mutex - but since we are after a sequence
541 * point (call to iwl_mvm_disable_txq(), so we don't even need
544 mvm
->queue_to_mac80211
[tid_data
->txq_id
] =
545 IWL_INVALID_MAC80211_QUEUE
;
546 ieee80211_stop_tx_ba_cb_irqsafe(vif
, sta
->addr
, tid
);
554 #ifdef CONFIG_IWLWIFI_DEBUG
555 const char *iwl_mvm_get_tx_fail_reason(u32 status
)
557 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
558 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
560 switch (status
& TX_STATUS_MSK
) {
561 case TX_STATUS_SUCCESS
:
563 TX_STATUS_POSTPONE(DELAY
);
564 TX_STATUS_POSTPONE(FEW_BYTES
);
565 TX_STATUS_POSTPONE(BT_PRIO
);
566 TX_STATUS_POSTPONE(QUIET_PERIOD
);
567 TX_STATUS_POSTPONE(CALC_TTAK
);
568 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY
);
569 TX_STATUS_FAIL(SHORT_LIMIT
);
570 TX_STATUS_FAIL(LONG_LIMIT
);
571 TX_STATUS_FAIL(UNDERRUN
);
572 TX_STATUS_FAIL(DRAIN_FLOW
);
573 TX_STATUS_FAIL(RFKILL_FLUSH
);
574 TX_STATUS_FAIL(LIFE_EXPIRE
);
575 TX_STATUS_FAIL(DEST_PS
);
576 TX_STATUS_FAIL(HOST_ABORTED
);
577 TX_STATUS_FAIL(BT_RETRY
);
578 TX_STATUS_FAIL(STA_INVALID
);
579 TX_STATUS_FAIL(FRAG_DROPPED
);
580 TX_STATUS_FAIL(TID_DISABLE
);
581 TX_STATUS_FAIL(FIFO_FLUSHED
);
582 TX_STATUS_FAIL(SMALL_CF_POLL
);
583 TX_STATUS_FAIL(FW_DROP
);
584 TX_STATUS_FAIL(STA_COLOR_MISMATCH
);
589 #undef TX_STATUS_FAIL
590 #undef TX_STATUS_POSTPONE
592 #endif /* CONFIG_IWLWIFI_DEBUG */
594 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags
,
595 enum ieee80211_band band
,
596 struct ieee80211_tx_rate
*r
)
598 if (rate_n_flags
& RATE_HT_MCS_GF_MSK
)
599 r
->flags
|= IEEE80211_TX_RC_GREEN_FIELD
;
600 switch (rate_n_flags
& RATE_MCS_CHAN_WIDTH_MSK
) {
601 case RATE_MCS_CHAN_WIDTH_20
:
603 case RATE_MCS_CHAN_WIDTH_40
:
604 r
->flags
|= IEEE80211_TX_RC_40_MHZ_WIDTH
;
606 case RATE_MCS_CHAN_WIDTH_80
:
607 r
->flags
|= IEEE80211_TX_RC_80_MHZ_WIDTH
;
609 case RATE_MCS_CHAN_WIDTH_160
:
610 r
->flags
|= IEEE80211_TX_RC_160_MHZ_WIDTH
;
613 if (rate_n_flags
& RATE_MCS_SGI_MSK
)
614 r
->flags
|= IEEE80211_TX_RC_SHORT_GI
;
615 if (rate_n_flags
& RATE_MCS_HT_MSK
) {
616 r
->flags
|= IEEE80211_TX_RC_MCS
;
617 r
->idx
= rate_n_flags
& RATE_HT_MCS_INDEX_MSK
;
618 } else if (rate_n_flags
& RATE_MCS_VHT_MSK
) {
619 ieee80211_rate_set_vht(
620 r
, rate_n_flags
& RATE_VHT_MCS_RATE_CODE_MSK
,
621 ((rate_n_flags
& RATE_VHT_MCS_NSS_MSK
) >>
622 RATE_VHT_MCS_NSS_POS
) + 1);
623 r
->flags
|= IEEE80211_TX_RC_VHT_MCS
;
625 r
->idx
= iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags
,
631 * translate ucode response to mac80211 tx status control values
633 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags
,
634 struct ieee80211_tx_info
*info
)
636 struct ieee80211_tx_rate
*r
= &info
->status
.rates
[0];
638 info
->status
.antenna
=
639 ((rate_n_flags
& RATE_MCS_ANT_ABC_MSK
) >> RATE_MCS_ANT_POS
);
640 iwl_mvm_hwrate_to_tx_rate(rate_n_flags
, info
->band
, r
);
643 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm
*mvm
,
644 struct iwl_rx_packet
*pkt
)
646 struct ieee80211_sta
*sta
;
647 u16 sequence
= le16_to_cpu(pkt
->hdr
.sequence
);
648 int txq_id
= SEQ_TO_QUEUE(sequence
);
649 struct iwl_mvm_tx_resp
*tx_resp
= (void *)pkt
->data
;
650 int sta_id
= IWL_MVM_TX_RES_GET_RA(tx_resp
->ra_tid
);
651 int tid
= IWL_MVM_TX_RES_GET_TID(tx_resp
->ra_tid
);
652 u32 status
= le16_to_cpu(tx_resp
->status
.status
);
653 u16 ssn
= iwl_mvm_get_scd_ssn(tx_resp
);
654 struct iwl_mvm_sta
*mvmsta
;
655 struct sk_buff_head skbs
;
657 u16 next_reclaimed
, seq_ctl
;
659 __skb_queue_head_init(&skbs
);
661 seq_ctl
= le16_to_cpu(tx_resp
->seq_ctl
);
663 /* we can free until ssn % q.n_bd not inclusive */
664 iwl_trans_reclaim(mvm
->trans
, txq_id
, ssn
, &skbs
);
666 while (!skb_queue_empty(&skbs
)) {
667 struct sk_buff
*skb
= __skb_dequeue(&skbs
);
668 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
672 iwl_trans_free_tx_cmd(mvm
->trans
, info
->driver_data
[1]);
674 memset(&info
->status
, 0, sizeof(info
->status
));
676 info
->flags
&= ~IEEE80211_TX_CTL_AMPDU
;
678 /* inform mac80211 about what happened with the frame */
679 switch (status
& TX_STATUS_MSK
) {
680 case TX_STATUS_SUCCESS
:
681 case TX_STATUS_DIRECT_DONE
:
682 info
->flags
|= IEEE80211_TX_STAT_ACK
;
684 case TX_STATUS_FAIL_DEST_PS
:
685 info
->flags
|= IEEE80211_TX_STAT_TX_FILTERED
;
691 info
->status
.rates
[0].count
= tx_resp
->failure_frame
+ 1;
692 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp
->initial_rate
),
694 info
->status
.status_driver_data
[1] =
695 (void *)(uintptr_t)le32_to_cpu(tx_resp
->initial_rate
);
697 /* Single frame failure in an AMPDU queue => send BAR */
698 if (txq_id
>= mvm
->first_agg_queue
&&
699 !(info
->flags
& IEEE80211_TX_STAT_ACK
) &&
700 !(info
->flags
& IEEE80211_TX_STAT_TX_FILTERED
))
701 info
->flags
|= IEEE80211_TX_STAT_AMPDU_NO_BACK
;
703 /* W/A FW bug: seq_ctl is wrong when the status isn't success */
704 if (status
!= TX_STATUS_SUCCESS
) {
705 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
706 seq_ctl
= le16_to_cpu(hdr
->seq_ctrl
);
710 * TODO: this is not accurate if we are freeing more than one
713 info
->status
.tx_time
=
714 le16_to_cpu(tx_resp
->wireless_media_time
);
715 BUILD_BUG_ON(ARRAY_SIZE(info
->status
.status_driver_data
) < 1);
716 info
->status
.status_driver_data
[0] =
717 (void *)(uintptr_t)tx_resp
->reduced_tpc
;
719 ieee80211_tx_status(mvm
->hw
, skb
);
722 if (txq_id
>= mvm
->first_agg_queue
) {
723 /* If this is an aggregation queue, we use the ssn since:
724 * ssn = wifi seq_num % 256.
725 * The seq_ctl is the sequence control of the packet to which
726 * this Tx response relates. But if there is a hole in the
727 * bitmap of the BA we received, this Tx response may allow to
728 * reclaim the hole and all the subsequent packets that were
729 * already acked. In that case, seq_ctl != ssn, and the next
730 * packet to be reclaimed will be ssn and not seq_ctl. In that
731 * case, several packets will be reclaimed even if
734 * The ssn is the index (% 256) of the latest packet that has
735 * treated (acked / dropped) + 1.
737 next_reclaimed
= ssn
;
739 /* The next packet to be reclaimed is the one after this one */
740 next_reclaimed
= IEEE80211_SEQ_TO_SN(seq_ctl
+ 0x10);
743 IWL_DEBUG_TX_REPLY(mvm
,
744 "TXQ %d status %s (0x%08x)\n",
745 txq_id
, iwl_mvm_get_tx_fail_reason(status
), status
);
747 IWL_DEBUG_TX_REPLY(mvm
,
748 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
749 le32_to_cpu(tx_resp
->initial_rate
),
750 tx_resp
->failure_frame
, SEQ_TO_INDEX(sequence
),
751 ssn
, next_reclaimed
, seq_ctl
);
755 sta
= rcu_dereference(mvm
->fw_id_to_mac_id
[sta_id
]);
757 * sta can't be NULL otherwise it'd mean that the sta has been freed in
758 * the firmware while we still have packets for it in the Tx queues.
760 if (WARN_ON_ONCE(!sta
))
764 mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
766 if (tid
!= IWL_TID_NON_QOS
) {
767 struct iwl_mvm_tid_data
*tid_data
=
768 &mvmsta
->tid_data
[tid
];
770 spin_lock_bh(&mvmsta
->lock
);
771 tid_data
->next_reclaimed
= next_reclaimed
;
772 IWL_DEBUG_TX_REPLY(mvm
, "Next reclaimed packet:%d\n",
774 iwl_mvm_check_ratid_empty(mvm
, sta
, tid
);
775 spin_unlock_bh(&mvmsta
->lock
);
778 if (mvmsta
->next_status_eosp
) {
779 mvmsta
->next_status_eosp
= false;
780 ieee80211_sta_eosp(sta
);
787 * If the txq is not an AMPDU queue, there is no chance we freed
788 * several skbs. Check that out...
790 if (txq_id
>= mvm
->first_agg_queue
)
793 /* We can't free more than one frame at once on a shared queue */
794 WARN_ON(skb_freed
> 1);
796 /* If we have still frames for this STA nothing to do here */
797 if (!atomic_sub_and_test(skb_freed
, &mvm
->pending_frames
[sta_id
]))
800 if (mvmsta
&& mvmsta
->vif
->type
== NL80211_IFTYPE_AP
) {
803 * If there are no pending frames for this STA and
804 * the tx to this station is not disabled, notify
805 * mac80211 that this station can now wake up in its
807 * If mvmsta is not NULL, sta is valid.
810 spin_lock_bh(&mvmsta
->lock
);
812 if (!mvmsta
->disable_tx
)
813 ieee80211_sta_block_awake(mvm
->hw
, sta
, false);
815 spin_unlock_bh(&mvmsta
->lock
);
818 if (PTR_ERR(sta
) == -EBUSY
|| PTR_ERR(sta
) == -ENOENT
) {
820 * We are draining and this was the last packet - pre_rcu_remove
821 * has been called already. We might be after the
822 * synchronize_net already.
823 * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues.
825 set_bit(sta_id
, mvm
->sta_drained
);
826 schedule_work(&mvm
->sta_drained_wk
);
833 #ifdef CONFIG_IWLWIFI_DEBUG
834 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
835 static const char *iwl_get_agg_tx_status(u16 status
)
837 switch (status
& AGG_TX_STATE_STATUS_MSK
) {
838 AGG_TX_STATE_(TRANSMITTED
);
839 AGG_TX_STATE_(UNDERRUN
);
840 AGG_TX_STATE_(BT_PRIO
);
841 AGG_TX_STATE_(FEW_BYTES
);
842 AGG_TX_STATE_(ABORT
);
843 AGG_TX_STATE_(LAST_SENT_TTL
);
844 AGG_TX_STATE_(LAST_SENT_TRY_CNT
);
845 AGG_TX_STATE_(LAST_SENT_BT_KILL
);
846 AGG_TX_STATE_(SCD_QUERY
);
847 AGG_TX_STATE_(TEST_BAD_CRC32
);
848 AGG_TX_STATE_(RESPONSE
);
849 AGG_TX_STATE_(DUMP_TX
);
850 AGG_TX_STATE_(DELAY_TX
);
856 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm
*mvm
,
857 struct iwl_rx_packet
*pkt
)
859 struct iwl_mvm_tx_resp
*tx_resp
= (void *)pkt
->data
;
860 struct agg_tx_status
*frame_status
= &tx_resp
->status
;
863 for (i
= 0; i
< tx_resp
->frame_count
; i
++) {
864 u16 fstatus
= le16_to_cpu(frame_status
[i
].status
);
866 IWL_DEBUG_TX_REPLY(mvm
,
867 "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
868 iwl_get_agg_tx_status(fstatus
),
869 fstatus
& AGG_TX_STATE_STATUS_MSK
,
870 (fstatus
& AGG_TX_STATE_TRY_CNT_MSK
) >>
871 AGG_TX_STATE_TRY_CNT_POS
,
872 le16_to_cpu(frame_status
[i
].sequence
));
876 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm
*mvm
,
877 struct iwl_rx_packet
*pkt
)
879 #endif /* CONFIG_IWLWIFI_DEBUG */
881 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm
*mvm
,
882 struct iwl_rx_packet
*pkt
)
884 struct iwl_mvm_tx_resp
*tx_resp
= (void *)pkt
->data
;
885 int sta_id
= IWL_MVM_TX_RES_GET_RA(tx_resp
->ra_tid
);
886 int tid
= IWL_MVM_TX_RES_GET_TID(tx_resp
->ra_tid
);
887 u16 sequence
= le16_to_cpu(pkt
->hdr
.sequence
);
888 struct ieee80211_sta
*sta
;
890 if (WARN_ON_ONCE(SEQ_TO_QUEUE(sequence
) < mvm
->first_agg_queue
))
893 if (WARN_ON_ONCE(tid
== IWL_TID_NON_QOS
))
896 iwl_mvm_rx_tx_cmd_agg_dbg(mvm
, pkt
);
900 sta
= rcu_dereference(mvm
->fw_id_to_mac_id
[sta_id
]);
902 if (!WARN_ON_ONCE(IS_ERR_OR_NULL(sta
))) {
903 struct iwl_mvm_sta
*mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
904 mvmsta
->tid_data
[tid
].rate_n_flags
=
905 le32_to_cpu(tx_resp
->initial_rate
);
906 mvmsta
->tid_data
[tid
].reduced_tpc
= tx_resp
->reduced_tpc
;
907 mvmsta
->tid_data
[tid
].tx_time
=
908 le16_to_cpu(tx_resp
->wireless_media_time
);
914 int iwl_mvm_rx_tx_cmd(struct iwl_mvm
*mvm
, struct iwl_rx_cmd_buffer
*rxb
,
915 struct iwl_device_cmd
*cmd
)
917 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
918 struct iwl_mvm_tx_resp
*tx_resp
= (void *)pkt
->data
;
920 if (tx_resp
->frame_count
== 1)
921 iwl_mvm_rx_tx_cmd_single(mvm
, pkt
);
923 iwl_mvm_rx_tx_cmd_agg(mvm
, pkt
);
928 static void iwl_mvm_tx_info_from_ba_notif(struct ieee80211_tx_info
*info
,
929 struct iwl_mvm_ba_notif
*ba_notif
,
930 struct iwl_mvm_tid_data
*tid_data
)
932 info
->flags
|= IEEE80211_TX_STAT_AMPDU
;
933 info
->status
.ampdu_ack_len
= ba_notif
->txed_2_done
;
934 info
->status
.ampdu_len
= ba_notif
->txed
;
935 iwl_mvm_hwrate_to_tx_status(tid_data
->rate_n_flags
,
937 /* TODO: not accounted if the whole A-MPDU failed */
938 info
->status
.tx_time
= tid_data
->tx_time
;
939 info
->status
.status_driver_data
[0] =
940 (void *)(uintptr_t)tid_data
->reduced_tpc
;
941 info
->status
.status_driver_data
[1] =
942 (void *)(uintptr_t)tid_data
->rate_n_flags
;
945 int iwl_mvm_rx_ba_notif(struct iwl_mvm
*mvm
, struct iwl_rx_cmd_buffer
*rxb
,
946 struct iwl_device_cmd
*cmd
)
948 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
949 struct iwl_mvm_ba_notif
*ba_notif
= (void *)pkt
->data
;
950 struct sk_buff_head reclaimed_skbs
;
951 struct iwl_mvm_tid_data
*tid_data
;
952 struct ieee80211_sta
*sta
;
953 struct iwl_mvm_sta
*mvmsta
;
955 int sta_id
, tid
, freed
;
956 /* "flow" corresponds to Tx queue */
957 u16 scd_flow
= le16_to_cpu(ba_notif
->scd_flow
);
958 /* "ssn" is start of block-ack Tx window, corresponds to index
959 * (in Tx queue's circular buffer) of first TFD/frame in window */
960 u16 ba_resp_scd_ssn
= le16_to_cpu(ba_notif
->scd_ssn
);
962 sta_id
= ba_notif
->sta_id
;
965 if (WARN_ONCE(sta_id
>= IWL_MVM_STATION_COUNT
||
966 tid
>= IWL_MAX_TID_COUNT
,
967 "sta_id %d tid %d", sta_id
, tid
))
972 sta
= rcu_dereference(mvm
->fw_id_to_mac_id
[sta_id
]);
974 /* Reclaiming frames for a station that has been deleted ? */
975 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta
))) {
980 mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
981 tid_data
= &mvmsta
->tid_data
[tid
];
983 if (tid_data
->txq_id
!= scd_flow
) {
985 "invalid BA notification: Q %d, tid %d, flow %d\n",
986 tid_data
->txq_id
, tid
, scd_flow
);
991 spin_lock_bh(&mvmsta
->lock
);
993 __skb_queue_head_init(&reclaimed_skbs
);
996 * Release all TFDs before the SSN, i.e. all TFDs in front of
997 * block-ack window (we assume that they've been successfully
998 * transmitted ... if not, it's too late anyway).
1000 iwl_trans_reclaim(mvm
->trans
, scd_flow
, ba_resp_scd_ssn
,
1003 IWL_DEBUG_TX_REPLY(mvm
,
1004 "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
1005 (u8
*)&ba_notif
->sta_addr_lo32
,
1007 IWL_DEBUG_TX_REPLY(mvm
,
1008 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1009 ba_notif
->tid
, le16_to_cpu(ba_notif
->seq_ctl
),
1010 (unsigned long long)le64_to_cpu(ba_notif
->bitmap
),
1011 scd_flow
, ba_resp_scd_ssn
, ba_notif
->txed
,
1012 ba_notif
->txed_2_done
);
1014 tid_data
->next_reclaimed
= ba_resp_scd_ssn
;
1016 iwl_mvm_check_ratid_empty(mvm
, sta
, tid
);
1020 skb_queue_walk(&reclaimed_skbs
, skb
) {
1021 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
1022 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1024 if (ieee80211_is_data_qos(hdr
->frame_control
))
1029 iwl_trans_free_tx_cmd(mvm
->trans
, info
->driver_data
[1]);
1031 memset(&info
->status
, 0, sizeof(info
->status
));
1032 /* Packet was transmitted successfully, failures come as single
1033 * frames because before failing a frame the firmware transmits
1034 * it without aggregation at least once.
1036 info
->flags
|= IEEE80211_TX_STAT_ACK
;
1038 /* this is the first skb we deliver in this batch */
1039 /* put the rate scaling data there */
1041 iwl_mvm_tx_info_from_ba_notif(info
, ba_notif
, tid_data
);
1044 spin_unlock_bh(&mvmsta
->lock
);
1046 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
1047 * possible (i.e. first MPDU in the aggregation wasn't acked)
1048 * Still it's important to update RS about sent vs. acked.
1050 if (skb_queue_empty(&reclaimed_skbs
)) {
1051 struct ieee80211_tx_info ba_info
= {};
1052 struct ieee80211_chanctx_conf
*chanctx_conf
= NULL
;
1056 rcu_dereference(mvmsta
->vif
->chanctx_conf
);
1058 if (WARN_ON_ONCE(!chanctx_conf
))
1061 ba_info
.band
= chanctx_conf
->def
.chan
->band
;
1062 iwl_mvm_tx_info_from_ba_notif(&ba_info
, ba_notif
, tid_data
);
1064 IWL_DEBUG_TX_REPLY(mvm
, "No reclaim. Update rs directly\n");
1065 iwl_mvm_rs_tx_status(mvm
, sta
, tid
, &ba_info
);
1071 while (!skb_queue_empty(&reclaimed_skbs
)) {
1072 skb
= __skb_dequeue(&reclaimed_skbs
);
1073 ieee80211_tx_status(mvm
->hw
, skb
);
1080 * Note that there are transports that buffer frames before they reach
1081 * the firmware. This means that after flush_tx_path is called, the
1082 * queue might not be empty. The race-free way to handle this is to:
1083 * 1) set the station as draining
1084 * 2) flush the Tx path
1085 * 3) wait for the transport queues to be empty
1087 int iwl_mvm_flush_tx_path(struct iwl_mvm
*mvm
, u32 tfd_msk
, bool sync
)
1090 struct iwl_tx_path_flush_cmd flush_cmd
= {
1091 .queues_ctl
= cpu_to_le32(tfd_msk
),
1092 .flush_ctl
= cpu_to_le16(DUMP_TX_FIFO_FLUSH
),
1095 u32 flags
= sync
? 0 : CMD_ASYNC
;
1097 ret
= iwl_mvm_send_cmd_pdu(mvm
, TXPATH_FLUSH
, flags
,
1098 sizeof(flush_cmd
), &flush_cmd
);
1100 IWL_ERR(mvm
, "Failed to send flush command (%d)\n", ret
);