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 - 2014 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 - 2014 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 * Sets most of the Tx cmd's fields
76 void iwl_mvm_set_tx_cmd(struct iwl_mvm
*mvm
, struct sk_buff
*skb
,
77 struct iwl_tx_cmd
*tx_cmd
,
78 struct ieee80211_tx_info
*info
, u8 sta_id
)
80 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
81 __le16 fc
= hdr
->frame_control
;
82 u32 tx_flags
= le32_to_cpu(tx_cmd
->tx_flags
);
83 u32 len
= skb
->len
+ FCS_LEN
;
86 if (!(info
->flags
& IEEE80211_TX_CTL_NO_ACK
))
87 tx_flags
|= TX_CMD_FLG_ACK
;
89 tx_flags
&= ~TX_CMD_FLG_ACK
;
91 if (ieee80211_is_probe_resp(fc
))
92 tx_flags
|= TX_CMD_FLG_TSF
;
93 else if (ieee80211_is_back_req(fc
))
94 tx_flags
|= TX_CMD_FLG_ACK
| TX_CMD_FLG_BAR
;
96 if (ieee80211_has_morefrags(fc
))
97 tx_flags
|= TX_CMD_FLG_MORE_FRAG
;
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
;
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
;
108 tx_flags
&= ~TX_CMD_FLG_SEQ_CTL
;
111 /* tid_tspec will default to 0 = BE when QOS isn't enabled */
112 ac
= tid_to_mac80211_ac
[tx_cmd
->tid_tspec
];
113 tx_flags
|= iwl_mvm_bt_coex_tx_prio(mvm
, hdr
, info
, ac
) <<
114 TX_CMD_FLG_BT_PRIO_POS
;
116 if (ieee80211_is_mgmt(fc
)) {
117 if (ieee80211_is_assoc_req(fc
) || ieee80211_is_reassoc_req(fc
))
118 tx_cmd
->pm_frame_timeout
= cpu_to_le16(3);
120 tx_cmd
->pm_frame_timeout
= cpu_to_le16(2);
122 /* The spec allows Action frames in A-MPDU, we don't support
125 WARN_ON_ONCE(info
->flags
& IEEE80211_TX_CTL_AMPDU
);
126 } else if (info
->control
.flags
& IEEE80211_TX_CTRL_PORT_CTRL_PROTO
) {
127 tx_cmd
->pm_frame_timeout
= cpu_to_le16(2);
129 tx_cmd
->pm_frame_timeout
= 0;
132 if (ieee80211_is_data(fc
) && len
> mvm
->rts_threshold
&&
133 !is_multicast_ether_addr(ieee80211_get_DA(hdr
)))
134 tx_flags
|= TX_CMD_FLG_PROT_REQUIRE
;
136 if ((mvm
->fw
->ucode_capa
.capa
[0] &
137 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT
) &&
138 ieee80211_action_contains_tpc(skb
))
139 tx_flags
|= TX_CMD_FLG_WRITE_TX_POWER
;
141 tx_cmd
->tx_flags
= cpu_to_le32(tx_flags
);
142 /* Total # bytes to be transmitted */
143 tx_cmd
->len
= cpu_to_le16((u16
)skb
->len
);
144 tx_cmd
->next_frame_len
= 0;
145 tx_cmd
->life_time
= cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE
);
146 tx_cmd
->sta_id
= sta_id
;
150 * Sets the fields in the Tx cmd that are rate related
152 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm
*mvm
, struct iwl_tx_cmd
*tx_cmd
,
153 struct ieee80211_tx_info
*info
,
154 struct ieee80211_sta
*sta
, __le16 fc
)
160 /* Set retry limit on RTS packets */
161 tx_cmd
->rts_retry_limit
= IWL_RTS_DFAULT_RETRY_LIMIT
;
163 /* Set retry limit on DATA packets and Probe Responses*/
164 if (ieee80211_is_probe_resp(fc
)) {
165 tx_cmd
->data_retry_limit
= IWL_MGMT_DFAULT_RETRY_LIMIT
;
166 tx_cmd
->rts_retry_limit
=
167 min(tx_cmd
->data_retry_limit
, tx_cmd
->rts_retry_limit
);
168 } else if (ieee80211_is_back_req(fc
)) {
169 tx_cmd
->data_retry_limit
= IWL_BAR_DFAULT_RETRY_LIMIT
;
171 tx_cmd
->data_retry_limit
= IWL_DEFAULT_TX_RETRY
;
175 * for data packets, rate info comes from the table inside the fw. This
176 * table is controlled by LINK_QUALITY commands
179 if (ieee80211_is_data(fc
) && sta
) {
180 tx_cmd
->initial_rate_index
= 0;
181 tx_cmd
->tx_flags
|= cpu_to_le32(TX_CMD_FLG_STA_RATE
);
183 } else if (ieee80211_is_back_req(fc
)) {
185 cpu_to_le32(TX_CMD_FLG_ACK
| TX_CMD_FLG_BAR
);
188 /* HT rate doesn't make sense for a non data frame */
189 WARN_ONCE(info
->control
.rates
[0].flags
& IEEE80211_TX_RC_MCS
,
190 "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame (fc:0x%x)\n",
191 info
->control
.rates
[0].flags
,
192 info
->control
.rates
[0].idx
,
195 rate_idx
= info
->control
.rates
[0].idx
;
196 /* if the rate isn't a well known legacy rate, take the lowest one */
197 if (rate_idx
< 0 || rate_idx
> IWL_RATE_COUNT_LEGACY
)
198 rate_idx
= rate_lowest_index(
199 &mvm
->nvm_data
->bands
[info
->band
], sta
);
201 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
202 if (info
->band
== IEEE80211_BAND_5GHZ
)
203 rate_idx
+= IWL_FIRST_OFDM_RATE
;
205 /* For 2.4 GHZ band, check that there is no need to remap */
206 BUILD_BUG_ON(IWL_FIRST_CCK_RATE
!= 0);
208 /* Get PLCP rate for tx_cmd->rate_n_flags */
209 rate_plcp
= iwl_mvm_mac80211_idx_to_hwrate(rate_idx
);
211 mvm
->mgmt_last_antenna_idx
=
212 iwl_mvm_next_antenna(mvm
, mvm
->fw
->valid_tx_ant
,
213 mvm
->mgmt_last_antenna_idx
);
215 if (info
->band
== IEEE80211_BAND_2GHZ
&&
216 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm
))
217 rate_flags
= BIT(mvm
->cfg
->non_shared_ant
) << RATE_MCS_ANT_POS
;
220 BIT(mvm
->mgmt_last_antenna_idx
) << RATE_MCS_ANT_POS
;
222 /* Set CCK flag as needed */
223 if ((rate_idx
>= IWL_FIRST_CCK_RATE
) && (rate_idx
<= IWL_LAST_CCK_RATE
))
224 rate_flags
|= RATE_MCS_CCK_MSK
;
226 /* Set the rate in the TX cmd */
227 tx_cmd
->rate_n_flags
= cpu_to_le32((u32
)rate_plcp
| rate_flags
);
231 * Sets the fields in the Tx cmd that are crypto related
233 void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm
*mvm
,
234 struct ieee80211_tx_info
*info
,
235 struct iwl_tx_cmd
*tx_cmd
,
236 struct sk_buff
*skb_frag
)
238 struct ieee80211_key_conf
*keyconf
= info
->control
.hw_key
;
240 switch (keyconf
->cipher
) {
241 case WLAN_CIPHER_SUITE_CCMP
:
242 tx_cmd
->sec_ctl
= TX_CMD_SEC_CCM
;
243 memcpy(tx_cmd
->key
, keyconf
->key
, keyconf
->keylen
);
244 if (info
->flags
& IEEE80211_TX_CTL_AMPDU
)
245 tx_cmd
->tx_flags
|= cpu_to_le32(TX_CMD_FLG_CCMP_AGG
);
248 case WLAN_CIPHER_SUITE_TKIP
:
249 tx_cmd
->sec_ctl
= TX_CMD_SEC_TKIP
;
250 ieee80211_get_tkip_p2k(keyconf
, skb_frag
, tx_cmd
->key
);
253 case WLAN_CIPHER_SUITE_WEP104
:
254 tx_cmd
->sec_ctl
|= TX_CMD_SEC_KEY128
;
256 case WLAN_CIPHER_SUITE_WEP40
:
257 tx_cmd
->sec_ctl
|= TX_CMD_SEC_WEP
|
258 ((keyconf
->keyidx
<< TX_CMD_SEC_WEP_KEY_IDX_POS
) &
259 TX_CMD_SEC_WEP_KEY_IDX_MSK
);
261 memcpy(&tx_cmd
->key
[3], keyconf
->key
, keyconf
->keylen
);
264 tx_cmd
->sec_ctl
|= TX_CMD_SEC_EXT
;
269 * Allocates and sets the Tx cmd the driver data pointers in the skb
271 static struct iwl_device_cmd
*
272 iwl_mvm_set_tx_params(struct iwl_mvm
*mvm
, struct sk_buff
*skb
,
273 struct ieee80211_sta
*sta
, u8 sta_id
)
275 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
276 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
277 struct iwl_device_cmd
*dev_cmd
;
278 struct iwl_tx_cmd
*tx_cmd
;
280 dev_cmd
= iwl_trans_alloc_tx_cmd(mvm
->trans
);
282 if (unlikely(!dev_cmd
))
285 memset(dev_cmd
, 0, sizeof(*dev_cmd
));
286 dev_cmd
->hdr
.cmd
= TX_CMD
;
287 tx_cmd
= (struct iwl_tx_cmd
*)dev_cmd
->payload
;
289 if (info
->control
.hw_key
)
290 iwl_mvm_set_tx_cmd_crypto(mvm
, info
, tx_cmd
, skb
);
292 iwl_mvm_set_tx_cmd(mvm
, skb
, tx_cmd
, info
, sta_id
);
294 iwl_mvm_set_tx_cmd_rate(mvm
, tx_cmd
, info
, sta
, hdr
->frame_control
);
296 memset(&info
->status
, 0, sizeof(info
->status
));
298 info
->driver_data
[0] = NULL
;
299 info
->driver_data
[1] = dev_cmd
;
304 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm
*mvm
, struct sk_buff
*skb
)
306 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
307 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
308 struct iwl_device_cmd
*dev_cmd
;
309 struct iwl_tx_cmd
*tx_cmd
;
312 if (WARN_ON_ONCE(info
->flags
& IEEE80211_TX_CTL_AMPDU
))
315 if (WARN_ON_ONCE(info
->flags
& IEEE80211_TX_CTL_SEND_AFTER_DTIM
&&
316 (!info
->control
.vif
||
317 info
->hw_queue
!= info
->control
.vif
->cab_queue
)))
321 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used
322 * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel
323 * queue. STATION (HS2.0) uses the auxiliary context of the FW,
324 * and hence needs to be sent on the aux queue
326 if (IEEE80211_SKB_CB(skb
)->hw_queue
== IWL_MVM_OFFCHANNEL_QUEUE
&&
327 info
->control
.vif
->type
== NL80211_IFTYPE_STATION
)
328 IEEE80211_SKB_CB(skb
)->hw_queue
= mvm
->aux_queue
;
331 * If the interface on which frame is sent is the P2P_DEVICE
332 * or an AP/GO interface use the broadcast station associated
333 * with it; otherwise use the AUX station.
335 if (info
->control
.vif
&&
336 (info
->control
.vif
->type
== NL80211_IFTYPE_P2P_DEVICE
||
337 info
->control
.vif
->type
== NL80211_IFTYPE_AP
)) {
338 struct iwl_mvm_vif
*mvmvif
=
339 iwl_mvm_vif_from_mac80211(info
->control
.vif
);
340 sta_id
= mvmvif
->bcast_sta
.sta_id
;
342 sta_id
= mvm
->aux_sta
.sta_id
;
345 IWL_DEBUG_TX(mvm
, "station Id %d, queue=%d\n", sta_id
, info
->hw_queue
);
347 dev_cmd
= iwl_mvm_set_tx_params(mvm
, skb
, NULL
, sta_id
);
351 /* From now on, we cannot access info->control */
352 tx_cmd
= (struct iwl_tx_cmd
*)dev_cmd
->payload
;
354 /* Copy MAC header from skb into command buffer */
355 memcpy(tx_cmd
->hdr
, hdr
, ieee80211_hdrlen(hdr
->frame_control
));
357 if (iwl_trans_tx(mvm
->trans
, skb
, dev_cmd
, info
->hw_queue
)) {
358 iwl_trans_free_tx_cmd(mvm
->trans
, dev_cmd
);
366 * Sets the fields in the Tx cmd that are crypto related
368 int iwl_mvm_tx_skb(struct iwl_mvm
*mvm
, struct sk_buff
*skb
,
369 struct ieee80211_sta
*sta
)
371 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
372 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
373 struct iwl_mvm_sta
*mvmsta
;
374 struct iwl_device_cmd
*dev_cmd
;
375 struct iwl_tx_cmd
*tx_cmd
;
378 u8 tid
= IWL_MAX_TID_COUNT
;
379 u8 txq_id
= info
->hw_queue
;
380 bool is_data_qos
= false, is_ampdu
= false;
382 mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
383 fc
= hdr
->frame_control
;
385 if (WARN_ON_ONCE(!mvmsta
))
388 if (WARN_ON_ONCE(mvmsta
->sta_id
== IWL_MVM_STATION_COUNT
))
391 dev_cmd
= iwl_mvm_set_tx_params(mvm
, skb
, sta
, mvmsta
->sta_id
);
395 tx_cmd
= (struct iwl_tx_cmd
*)dev_cmd
->payload
;
396 /* From now on, we cannot access info->control */
399 * we handle that entirely ourselves -- for uAPSD the firmware
400 * will always send a notification, and for PS-Poll responses
401 * we'll notify mac80211 when getting frame status
403 info
->flags
&= ~IEEE80211_TX_STATUS_EOSP
;
405 spin_lock(&mvmsta
->lock
);
407 if (ieee80211_is_data_qos(fc
) && !ieee80211_is_qos_nullfunc(fc
)) {
409 qc
= ieee80211_get_qos_ctl(hdr
);
410 tid
= qc
[0] & IEEE80211_QOS_CTL_TID_MASK
;
411 if (WARN_ON_ONCE(tid
>= IWL_MAX_TID_COUNT
))
412 goto drop_unlock_sta
;
414 seq_number
= mvmsta
->tid_data
[tid
].seq_number
;
415 seq_number
&= IEEE80211_SCTL_SEQ
;
416 hdr
->seq_ctrl
&= cpu_to_le16(IEEE80211_SCTL_FRAG
);
417 hdr
->seq_ctrl
|= cpu_to_le16(seq_number
);
419 is_ampdu
= info
->flags
& IEEE80211_TX_CTL_AMPDU
;
422 /* Copy MAC header from skb into command buffer */
423 memcpy(tx_cmd
->hdr
, hdr
, ieee80211_hdrlen(fc
));
425 WARN_ON_ONCE(info
->flags
& IEEE80211_TX_CTL_SEND_AFTER_DTIM
);
428 if (WARN_ON_ONCE(mvmsta
->tid_data
[tid
].state
!= IWL_AGG_ON
))
429 goto drop_unlock_sta
;
430 txq_id
= mvmsta
->tid_data
[tid
].txq_id
;
433 IWL_DEBUG_TX(mvm
, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta
->sta_id
,
434 tid
, txq_id
, IEEE80211_SEQ_TO_SN(seq_number
));
436 if (iwl_trans_tx(mvm
->trans
, skb
, dev_cmd
, txq_id
))
437 goto drop_unlock_sta
;
439 if (is_data_qos
&& !ieee80211_has_morefrags(fc
))
440 mvmsta
->tid_data
[tid
].seq_number
= seq_number
+ 0x10;
442 spin_unlock(&mvmsta
->lock
);
444 if (txq_id
< mvm
->first_agg_queue
)
445 atomic_inc(&mvm
->pending_frames
[mvmsta
->sta_id
]);
450 iwl_trans_free_tx_cmd(mvm
->trans
, dev_cmd
);
451 spin_unlock(&mvmsta
->lock
);
456 static void iwl_mvm_check_ratid_empty(struct iwl_mvm
*mvm
,
457 struct ieee80211_sta
*sta
, u8 tid
)
459 struct iwl_mvm_sta
*mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
460 struct iwl_mvm_tid_data
*tid_data
= &mvmsta
->tid_data
[tid
];
461 struct ieee80211_vif
*vif
= mvmsta
->vif
;
463 lockdep_assert_held(&mvmsta
->lock
);
465 if ((tid_data
->state
== IWL_AGG_ON
||
466 tid_data
->state
== IWL_EMPTYING_HW_QUEUE_DELBA
) &&
467 iwl_mvm_tid_queued(tid_data
) == 0) {
469 * Now that this aggregation queue is empty tell mac80211 so it
470 * knows we no longer have frames buffered for the station on
471 * this TID (for the TIM bitmap calculation.)
473 ieee80211_sta_set_buffered(sta
, tid
, false);
476 if (tid_data
->ssn
!= tid_data
->next_reclaimed
)
479 switch (tid_data
->state
) {
480 case IWL_EMPTYING_HW_QUEUE_ADDBA
:
481 IWL_DEBUG_TX_QUEUES(mvm
,
482 "Can continue addBA flow ssn = next_recl = %d\n",
483 tid_data
->next_reclaimed
);
484 tid_data
->state
= IWL_AGG_STARTING
;
485 ieee80211_start_tx_ba_cb_irqsafe(vif
, sta
->addr
, tid
);
488 case IWL_EMPTYING_HW_QUEUE_DELBA
:
489 IWL_DEBUG_TX_QUEUES(mvm
,
490 "Can continue DELBA flow ssn = next_recl = %d\n",
491 tid_data
->next_reclaimed
);
492 iwl_mvm_disable_txq(mvm
, tid_data
->txq_id
);
493 tid_data
->state
= IWL_AGG_OFF
;
495 * we can't hold the mutex - but since we are after a sequence
496 * point (call to iwl_mvm_disable_txq(), so we don't even need
499 mvm
->queue_to_mac80211
[tid_data
->txq_id
] =
500 IWL_INVALID_MAC80211_QUEUE
;
501 ieee80211_stop_tx_ba_cb_irqsafe(vif
, sta
->addr
, tid
);
509 #ifdef CONFIG_IWLWIFI_DEBUG
510 const char *iwl_mvm_get_tx_fail_reason(u32 status
)
512 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
513 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
515 switch (status
& TX_STATUS_MSK
) {
516 case TX_STATUS_SUCCESS
:
518 TX_STATUS_POSTPONE(DELAY
);
519 TX_STATUS_POSTPONE(FEW_BYTES
);
520 TX_STATUS_POSTPONE(BT_PRIO
);
521 TX_STATUS_POSTPONE(QUIET_PERIOD
);
522 TX_STATUS_POSTPONE(CALC_TTAK
);
523 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY
);
524 TX_STATUS_FAIL(SHORT_LIMIT
);
525 TX_STATUS_FAIL(LONG_LIMIT
);
526 TX_STATUS_FAIL(UNDERRUN
);
527 TX_STATUS_FAIL(DRAIN_FLOW
);
528 TX_STATUS_FAIL(RFKILL_FLUSH
);
529 TX_STATUS_FAIL(LIFE_EXPIRE
);
530 TX_STATUS_FAIL(DEST_PS
);
531 TX_STATUS_FAIL(HOST_ABORTED
);
532 TX_STATUS_FAIL(BT_RETRY
);
533 TX_STATUS_FAIL(STA_INVALID
);
534 TX_STATUS_FAIL(FRAG_DROPPED
);
535 TX_STATUS_FAIL(TID_DISABLE
);
536 TX_STATUS_FAIL(FIFO_FLUSHED
);
537 TX_STATUS_FAIL(SMALL_CF_POLL
);
538 TX_STATUS_FAIL(FW_DROP
);
539 TX_STATUS_FAIL(STA_COLOR_MISMATCH
);
544 #undef TX_STATUS_FAIL
545 #undef TX_STATUS_POSTPONE
547 #endif /* CONFIG_IWLWIFI_DEBUG */
549 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags
,
550 enum ieee80211_band band
,
551 struct ieee80211_tx_rate
*r
)
553 if (rate_n_flags
& RATE_HT_MCS_GF_MSK
)
554 r
->flags
|= IEEE80211_TX_RC_GREEN_FIELD
;
555 switch (rate_n_flags
& RATE_MCS_CHAN_WIDTH_MSK
) {
556 case RATE_MCS_CHAN_WIDTH_20
:
558 case RATE_MCS_CHAN_WIDTH_40
:
559 r
->flags
|= IEEE80211_TX_RC_40_MHZ_WIDTH
;
561 case RATE_MCS_CHAN_WIDTH_80
:
562 r
->flags
|= IEEE80211_TX_RC_80_MHZ_WIDTH
;
564 case RATE_MCS_CHAN_WIDTH_160
:
565 r
->flags
|= IEEE80211_TX_RC_160_MHZ_WIDTH
;
568 if (rate_n_flags
& RATE_MCS_SGI_MSK
)
569 r
->flags
|= IEEE80211_TX_RC_SHORT_GI
;
570 if (rate_n_flags
& RATE_MCS_HT_MSK
) {
571 r
->flags
|= IEEE80211_TX_RC_MCS
;
572 r
->idx
= rate_n_flags
& RATE_HT_MCS_INDEX_MSK
;
573 } else if (rate_n_flags
& RATE_MCS_VHT_MSK
) {
574 ieee80211_rate_set_vht(
575 r
, rate_n_flags
& RATE_VHT_MCS_RATE_CODE_MSK
,
576 ((rate_n_flags
& RATE_VHT_MCS_NSS_MSK
) >>
577 RATE_VHT_MCS_NSS_POS
) + 1);
578 r
->flags
|= IEEE80211_TX_RC_VHT_MCS
;
580 r
->idx
= iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags
,
586 * translate ucode response to mac80211 tx status control values
588 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags
,
589 struct ieee80211_tx_info
*info
)
591 struct ieee80211_tx_rate
*r
= &info
->status
.rates
[0];
593 info
->status
.antenna
=
594 ((rate_n_flags
& RATE_MCS_ANT_ABC_MSK
) >> RATE_MCS_ANT_POS
);
595 iwl_mvm_hwrate_to_tx_rate(rate_n_flags
, info
->band
, r
);
598 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm
*mvm
,
599 struct iwl_rx_packet
*pkt
)
601 struct ieee80211_sta
*sta
;
602 u16 sequence
= le16_to_cpu(pkt
->hdr
.sequence
);
603 int txq_id
= SEQ_TO_QUEUE(sequence
);
604 struct iwl_mvm_tx_resp
*tx_resp
= (void *)pkt
->data
;
605 int sta_id
= IWL_MVM_TX_RES_GET_RA(tx_resp
->ra_tid
);
606 int tid
= IWL_MVM_TX_RES_GET_TID(tx_resp
->ra_tid
);
607 u32 status
= le16_to_cpu(tx_resp
->status
.status
);
608 u16 ssn
= iwl_mvm_get_scd_ssn(tx_resp
);
609 struct iwl_mvm_sta
*mvmsta
;
610 struct sk_buff_head skbs
;
612 u16 next_reclaimed
, seq_ctl
;
614 __skb_queue_head_init(&skbs
);
616 seq_ctl
= le16_to_cpu(tx_resp
->seq_ctl
);
618 /* we can free until ssn % q.n_bd not inclusive */
619 iwl_trans_reclaim(mvm
->trans
, txq_id
, ssn
, &skbs
);
621 while (!skb_queue_empty(&skbs
)) {
622 struct sk_buff
*skb
= __skb_dequeue(&skbs
);
623 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
627 iwl_trans_free_tx_cmd(mvm
->trans
, info
->driver_data
[1]);
629 memset(&info
->status
, 0, sizeof(info
->status
));
631 info
->flags
&= ~IEEE80211_TX_CTL_AMPDU
;
633 /* inform mac80211 about what happened with the frame */
634 switch (status
& TX_STATUS_MSK
) {
635 case TX_STATUS_SUCCESS
:
636 case TX_STATUS_DIRECT_DONE
:
637 info
->flags
|= IEEE80211_TX_STAT_ACK
;
639 case TX_STATUS_FAIL_DEST_PS
:
640 info
->flags
|= IEEE80211_TX_STAT_TX_FILTERED
;
646 info
->status
.rates
[0].count
= tx_resp
->failure_frame
+ 1;
647 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp
->initial_rate
),
650 /* Single frame failure in an AMPDU queue => send BAR */
651 if (txq_id
>= mvm
->first_agg_queue
&&
652 !(info
->flags
& IEEE80211_TX_STAT_ACK
))
653 info
->flags
|= IEEE80211_TX_STAT_AMPDU_NO_BACK
;
655 /* W/A FW bug: seq_ctl is wrong when the status isn't success */
656 if (status
!= TX_STATUS_SUCCESS
) {
657 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
658 seq_ctl
= le16_to_cpu(hdr
->seq_ctrl
);
661 BUILD_BUG_ON(ARRAY_SIZE(info
->status
.status_driver_data
) < 1);
662 info
->status
.status_driver_data
[0] =
663 (void *)(uintptr_t)tx_resp
->reduced_tpc
;
665 ieee80211_tx_status(mvm
->hw
, skb
);
668 if (txq_id
>= mvm
->first_agg_queue
) {
669 /* If this is an aggregation queue, we use the ssn since:
670 * ssn = wifi seq_num % 256.
671 * The seq_ctl is the sequence control of the packet to which
672 * this Tx response relates. But if there is a hole in the
673 * bitmap of the BA we received, this Tx response may allow to
674 * reclaim the hole and all the subsequent packets that were
675 * already acked. In that case, seq_ctl != ssn, and the next
676 * packet to be reclaimed will be ssn and not seq_ctl. In that
677 * case, several packets will be reclaimed even if
680 * The ssn is the index (% 256) of the latest packet that has
681 * treated (acked / dropped) + 1.
683 next_reclaimed
= ssn
;
685 /* The next packet to be reclaimed is the one after this one */
686 next_reclaimed
= IEEE80211_SEQ_TO_SN(seq_ctl
+ 0x10);
689 IWL_DEBUG_TX_REPLY(mvm
,
690 "TXQ %d status %s (0x%08x)\n",
691 txq_id
, iwl_mvm_get_tx_fail_reason(status
), status
);
693 IWL_DEBUG_TX_REPLY(mvm
,
694 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
695 le32_to_cpu(tx_resp
->initial_rate
),
696 tx_resp
->failure_frame
, SEQ_TO_INDEX(sequence
),
697 ssn
, next_reclaimed
, seq_ctl
);
701 sta
= rcu_dereference(mvm
->fw_id_to_mac_id
[sta_id
]);
703 * sta can't be NULL otherwise it'd mean that the sta has been freed in
704 * the firmware while we still have packets for it in the Tx queues.
706 if (WARN_ON_ONCE(!sta
))
710 mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
712 if (tid
!= IWL_TID_NON_QOS
) {
713 struct iwl_mvm_tid_data
*tid_data
=
714 &mvmsta
->tid_data
[tid
];
716 spin_lock_bh(&mvmsta
->lock
);
717 tid_data
->next_reclaimed
= next_reclaimed
;
718 IWL_DEBUG_TX_REPLY(mvm
, "Next reclaimed packet:%d\n",
720 iwl_mvm_check_ratid_empty(mvm
, sta
, tid
);
721 spin_unlock_bh(&mvmsta
->lock
);
724 if (mvmsta
->next_status_eosp
) {
725 mvmsta
->next_status_eosp
= false;
726 ieee80211_sta_eosp(sta
);
733 * If the txq is not an AMPDU queue, there is no chance we freed
734 * several skbs. Check that out...
736 if (txq_id
>= mvm
->first_agg_queue
)
739 /* We can't free more than one frame at once on a shared queue */
740 WARN_ON(skb_freed
> 1);
742 /* If we have still frames for this STA nothing to do here */
743 if (!atomic_sub_and_test(skb_freed
, &mvm
->pending_frames
[sta_id
]))
746 if (mvmsta
&& mvmsta
->vif
->type
== NL80211_IFTYPE_AP
) {
749 * If there are no pending frames for this STA and
750 * the tx to this station is not disabled, notify
751 * mac80211 that this station can now wake up in its
753 * If mvmsta is not NULL, sta is valid.
756 spin_lock_bh(&mvmsta
->lock
);
758 if (!mvmsta
->disable_tx
)
759 ieee80211_sta_block_awake(mvm
->hw
, sta
, false);
761 spin_unlock_bh(&mvmsta
->lock
);
764 if (PTR_ERR(sta
) == -EBUSY
|| PTR_ERR(sta
) == -ENOENT
) {
766 * We are draining and this was the last packet - pre_rcu_remove
767 * has been called already. We might be after the
768 * synchronize_net already.
769 * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues.
771 set_bit(sta_id
, mvm
->sta_drained
);
772 schedule_work(&mvm
->sta_drained_wk
);
779 #ifdef CONFIG_IWLWIFI_DEBUG
780 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
781 static const char *iwl_get_agg_tx_status(u16 status
)
783 switch (status
& AGG_TX_STATE_STATUS_MSK
) {
784 AGG_TX_STATE_(TRANSMITTED
);
785 AGG_TX_STATE_(UNDERRUN
);
786 AGG_TX_STATE_(BT_PRIO
);
787 AGG_TX_STATE_(FEW_BYTES
);
788 AGG_TX_STATE_(ABORT
);
789 AGG_TX_STATE_(LAST_SENT_TTL
);
790 AGG_TX_STATE_(LAST_SENT_TRY_CNT
);
791 AGG_TX_STATE_(LAST_SENT_BT_KILL
);
792 AGG_TX_STATE_(SCD_QUERY
);
793 AGG_TX_STATE_(TEST_BAD_CRC32
);
794 AGG_TX_STATE_(RESPONSE
);
795 AGG_TX_STATE_(DUMP_TX
);
796 AGG_TX_STATE_(DELAY_TX
);
802 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm
*mvm
,
803 struct iwl_rx_packet
*pkt
)
805 struct iwl_mvm_tx_resp
*tx_resp
= (void *)pkt
->data
;
806 struct agg_tx_status
*frame_status
= &tx_resp
->status
;
809 for (i
= 0; i
< tx_resp
->frame_count
; i
++) {
810 u16 fstatus
= le16_to_cpu(frame_status
[i
].status
);
812 IWL_DEBUG_TX_REPLY(mvm
,
813 "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
814 iwl_get_agg_tx_status(fstatus
),
815 fstatus
& AGG_TX_STATE_STATUS_MSK
,
816 (fstatus
& AGG_TX_STATE_TRY_CNT_MSK
) >>
817 AGG_TX_STATE_TRY_CNT_POS
,
818 le16_to_cpu(frame_status
[i
].sequence
));
822 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm
*mvm
,
823 struct iwl_rx_packet
*pkt
)
825 #endif /* CONFIG_IWLWIFI_DEBUG */
827 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm
*mvm
,
828 struct iwl_rx_packet
*pkt
)
830 struct iwl_mvm_tx_resp
*tx_resp
= (void *)pkt
->data
;
831 int sta_id
= IWL_MVM_TX_RES_GET_RA(tx_resp
->ra_tid
);
832 int tid
= IWL_MVM_TX_RES_GET_TID(tx_resp
->ra_tid
);
833 u16 sequence
= le16_to_cpu(pkt
->hdr
.sequence
);
834 struct ieee80211_sta
*sta
;
836 if (WARN_ON_ONCE(SEQ_TO_QUEUE(sequence
) < mvm
->first_agg_queue
))
839 if (WARN_ON_ONCE(tid
== IWL_TID_NON_QOS
))
842 iwl_mvm_rx_tx_cmd_agg_dbg(mvm
, pkt
);
846 sta
= rcu_dereference(mvm
->fw_id_to_mac_id
[sta_id
]);
848 if (!WARN_ON_ONCE(IS_ERR_OR_NULL(sta
))) {
849 struct iwl_mvm_sta
*mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
850 mvmsta
->tid_data
[tid
].rate_n_flags
=
851 le32_to_cpu(tx_resp
->initial_rate
);
852 mvmsta
->tid_data
[tid
].reduced_tpc
= tx_resp
->reduced_tpc
;
858 int iwl_mvm_rx_tx_cmd(struct iwl_mvm
*mvm
, struct iwl_rx_cmd_buffer
*rxb
,
859 struct iwl_device_cmd
*cmd
)
861 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
862 struct iwl_mvm_tx_resp
*tx_resp
= (void *)pkt
->data
;
864 if (tx_resp
->frame_count
== 1)
865 iwl_mvm_rx_tx_cmd_single(mvm
, pkt
);
867 iwl_mvm_rx_tx_cmd_agg(mvm
, pkt
);
872 static void iwl_mvm_tx_info_from_ba_notif(struct ieee80211_tx_info
*info
,
873 struct iwl_mvm_ba_notif
*ba_notif
,
874 struct iwl_mvm_tid_data
*tid_data
)
876 info
->flags
|= IEEE80211_TX_STAT_AMPDU
;
877 info
->status
.ampdu_ack_len
= ba_notif
->txed_2_done
;
878 info
->status
.ampdu_len
= ba_notif
->txed
;
879 iwl_mvm_hwrate_to_tx_status(tid_data
->rate_n_flags
,
881 info
->status
.status_driver_data
[0] =
882 (void *)(uintptr_t)tid_data
->reduced_tpc
;
885 int iwl_mvm_rx_ba_notif(struct iwl_mvm
*mvm
, struct iwl_rx_cmd_buffer
*rxb
,
886 struct iwl_device_cmd
*cmd
)
888 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
889 struct iwl_mvm_ba_notif
*ba_notif
= (void *)pkt
->data
;
890 struct sk_buff_head reclaimed_skbs
;
891 struct iwl_mvm_tid_data
*tid_data
;
892 struct ieee80211_sta
*sta
;
893 struct iwl_mvm_sta
*mvmsta
;
895 int sta_id
, tid
, freed
;
896 /* "flow" corresponds to Tx queue */
897 u16 scd_flow
= le16_to_cpu(ba_notif
->scd_flow
);
898 /* "ssn" is start of block-ack Tx window, corresponds to index
899 * (in Tx queue's circular buffer) of first TFD/frame in window */
900 u16 ba_resp_scd_ssn
= le16_to_cpu(ba_notif
->scd_ssn
);
902 sta_id
= ba_notif
->sta_id
;
907 sta
= rcu_dereference(mvm
->fw_id_to_mac_id
[sta_id
]);
909 /* Reclaiming frames for a station that has been deleted ? */
910 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta
))) {
915 mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
916 tid_data
= &mvmsta
->tid_data
[tid
];
918 if (WARN_ONCE(tid_data
->txq_id
!= scd_flow
, "Q %d, tid %d, flow %d",
919 tid_data
->txq_id
, tid
, scd_flow
)) {
924 spin_lock_bh(&mvmsta
->lock
);
926 __skb_queue_head_init(&reclaimed_skbs
);
929 * Release all TFDs before the SSN, i.e. all TFDs in front of
930 * block-ack window (we assume that they've been successfully
931 * transmitted ... if not, it's too late anyway).
933 iwl_trans_reclaim(mvm
->trans
, scd_flow
, ba_resp_scd_ssn
,
936 IWL_DEBUG_TX_REPLY(mvm
,
937 "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
938 (u8
*)&ba_notif
->sta_addr_lo32
,
940 IWL_DEBUG_TX_REPLY(mvm
,
941 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
942 ba_notif
->tid
, le16_to_cpu(ba_notif
->seq_ctl
),
943 (unsigned long long)le64_to_cpu(ba_notif
->bitmap
),
944 scd_flow
, ba_resp_scd_ssn
, ba_notif
->txed
,
945 ba_notif
->txed_2_done
);
947 tid_data
->next_reclaimed
= ba_resp_scd_ssn
;
949 iwl_mvm_check_ratid_empty(mvm
, sta
, tid
);
953 skb_queue_walk(&reclaimed_skbs
, skb
) {
954 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
955 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
957 if (ieee80211_is_data_qos(hdr
->frame_control
))
962 iwl_trans_free_tx_cmd(mvm
->trans
, info
->driver_data
[1]);
964 memset(&info
->status
, 0, sizeof(info
->status
));
965 /* Packet was transmitted successfully, failures come as single
966 * frames because before failing a frame the firmware transmits
967 * it without aggregation at least once.
969 info
->flags
|= IEEE80211_TX_STAT_ACK
;
971 /* this is the first skb we deliver in this batch */
972 /* put the rate scaling data there */
974 iwl_mvm_tx_info_from_ba_notif(info
, ba_notif
, tid_data
);
977 spin_unlock_bh(&mvmsta
->lock
);
979 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
980 * possible (i.e. first MPDU in the aggregation wasn't acked)
981 * Still it's important to update RS about sent vs. acked.
983 if (skb_queue_empty(&reclaimed_skbs
)) {
984 struct ieee80211_tx_info ba_info
= {};
985 struct ieee80211_chanctx_conf
*chanctx_conf
= NULL
;
989 rcu_dereference(mvmsta
->vif
->chanctx_conf
);
991 if (WARN_ON_ONCE(!chanctx_conf
))
994 ba_info
.band
= chanctx_conf
->def
.chan
->band
;
995 iwl_mvm_tx_info_from_ba_notif(&ba_info
, ba_notif
, tid_data
);
997 IWL_DEBUG_TX_REPLY(mvm
, "No reclaim. Update rs directly\n");
998 iwl_mvm_rs_tx_status(mvm
, sta
, tid
, &ba_info
);
1004 while (!skb_queue_empty(&reclaimed_skbs
)) {
1005 skb
= __skb_dequeue(&reclaimed_skbs
);
1006 ieee80211_tx_status(mvm
->hw
, skb
);
1012 int iwl_mvm_flush_tx_path(struct iwl_mvm
*mvm
, u32 tfd_msk
, bool sync
)
1015 struct iwl_tx_path_flush_cmd flush_cmd
= {
1016 .queues_ctl
= cpu_to_le32(tfd_msk
),
1017 .flush_ctl
= cpu_to_le16(DUMP_TX_FIFO_FLUSH
),
1020 u32 flags
= sync
? 0 : CMD_ASYNC
;
1022 ret
= iwl_mvm_send_cmd_pdu(mvm
, TXPATH_FLUSH
, flags
,
1023 sizeof(flush_cmd
), &flush_cmd
);
1025 IWL_ERR(mvm
, "Failed to send flush command (%d)\n", ret
);