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
;
94 if (ieee80211_has_morefrags(fc
))
95 tx_flags
|= TX_CMD_FLG_MORE_FRAG
;
97 if (ieee80211_is_data_qos(fc
)) {
98 u8
*qc
= ieee80211_get_qos_ctl(hdr
);
99 tx_cmd
->tid_tspec
= qc
[0] & 0xf;
100 tx_flags
&= ~TX_CMD_FLG_SEQ_CTL
;
101 } else if (ieee80211_is_back_req(fc
)) {
102 struct ieee80211_bar
*bar
= (void *)skb
->data
;
103 u16 control
= le16_to_cpu(bar
->control
);
105 tx_flags
|= TX_CMD_FLG_ACK
| TX_CMD_FLG_BAR
;
106 tx_cmd
->tid_tspec
= (control
&
107 IEEE80211_BAR_CTRL_TID_INFO_MASK
) >>
108 IEEE80211_BAR_CTRL_TID_INFO_SHIFT
;
109 WARN_ON_ONCE(tx_cmd
->tid_tspec
>= IWL_MAX_TID_COUNT
);
111 tx_cmd
->tid_tspec
= IWL_TID_NON_QOS
;
112 if (info
->flags
& IEEE80211_TX_CTL_ASSIGN_SEQ
)
113 tx_flags
|= TX_CMD_FLG_SEQ_CTL
;
115 tx_flags
&= ~TX_CMD_FLG_SEQ_CTL
;
118 /* Default to 0 (BE) when tid_spec is set to IWL_TID_NON_QOS */
119 if (tx_cmd
->tid_tspec
< IWL_MAX_TID_COUNT
)
120 ac
= tid_to_mac80211_ac
[tx_cmd
->tid_tspec
];
122 ac
= tid_to_mac80211_ac
[0];
124 tx_flags
|= iwl_mvm_bt_coex_tx_prio(mvm
, hdr
, info
, ac
) <<
125 TX_CMD_FLG_BT_PRIO_POS
;
127 if (ieee80211_is_mgmt(fc
)) {
128 if (ieee80211_is_assoc_req(fc
) || ieee80211_is_reassoc_req(fc
))
129 tx_cmd
->pm_frame_timeout
= cpu_to_le16(3);
131 tx_cmd
->pm_frame_timeout
= cpu_to_le16(2);
133 /* The spec allows Action frames in A-MPDU, we don't support
136 WARN_ON_ONCE(info
->flags
& IEEE80211_TX_CTL_AMPDU
);
137 } else if (info
->control
.flags
& IEEE80211_TX_CTRL_PORT_CTRL_PROTO
) {
138 tx_cmd
->pm_frame_timeout
= cpu_to_le16(2);
140 tx_cmd
->pm_frame_timeout
= 0;
143 if (ieee80211_is_data(fc
) && len
> mvm
->rts_threshold
&&
144 !is_multicast_ether_addr(ieee80211_get_DA(hdr
)))
145 tx_flags
|= TX_CMD_FLG_PROT_REQUIRE
;
147 if ((mvm
->fw
->ucode_capa
.capa
[0] &
148 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT
) &&
149 ieee80211_action_contains_tpc(skb
))
150 tx_flags
|= TX_CMD_FLG_WRITE_TX_POWER
;
152 tx_cmd
->tx_flags
= cpu_to_le32(tx_flags
);
153 /* Total # bytes to be transmitted */
154 tx_cmd
->len
= cpu_to_le16((u16
)skb
->len
);
155 tx_cmd
->next_frame_len
= 0;
156 tx_cmd
->life_time
= cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE
);
157 tx_cmd
->sta_id
= sta_id
;
161 * Sets the fields in the Tx cmd that are rate related
163 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm
*mvm
, struct iwl_tx_cmd
*tx_cmd
,
164 struct ieee80211_tx_info
*info
,
165 struct ieee80211_sta
*sta
, __le16 fc
)
171 /* Set retry limit on RTS packets */
172 tx_cmd
->rts_retry_limit
= IWL_RTS_DFAULT_RETRY_LIMIT
;
174 /* Set retry limit on DATA packets and Probe Responses*/
175 if (ieee80211_is_probe_resp(fc
)) {
176 tx_cmd
->data_retry_limit
= IWL_MGMT_DFAULT_RETRY_LIMIT
;
177 tx_cmd
->rts_retry_limit
=
178 min(tx_cmd
->data_retry_limit
, tx_cmd
->rts_retry_limit
);
179 } else if (ieee80211_is_back_req(fc
)) {
180 tx_cmd
->data_retry_limit
= IWL_BAR_DFAULT_RETRY_LIMIT
;
182 tx_cmd
->data_retry_limit
= IWL_DEFAULT_TX_RETRY
;
186 * for data packets, rate info comes from the table inside the fw. This
187 * table is controlled by LINK_QUALITY commands
190 if (ieee80211_is_data(fc
) && sta
) {
191 tx_cmd
->initial_rate_index
= 0;
192 tx_cmd
->tx_flags
|= cpu_to_le32(TX_CMD_FLG_STA_RATE
);
194 } else if (ieee80211_is_back_req(fc
)) {
196 cpu_to_le32(TX_CMD_FLG_ACK
| TX_CMD_FLG_BAR
);
199 /* HT rate doesn't make sense for a non data frame */
200 WARN_ONCE(info
->control
.rates
[0].flags
& IEEE80211_TX_RC_MCS
,
201 "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame (fc:0x%x)\n",
202 info
->control
.rates
[0].flags
,
203 info
->control
.rates
[0].idx
,
206 rate_idx
= info
->control
.rates
[0].idx
;
207 /* if the rate isn't a well known legacy rate, take the lowest one */
208 if (rate_idx
< 0 || rate_idx
> IWL_RATE_COUNT_LEGACY
)
209 rate_idx
= rate_lowest_index(
210 &mvm
->nvm_data
->bands
[info
->band
], sta
);
212 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
213 if (info
->band
== IEEE80211_BAND_5GHZ
)
214 rate_idx
+= IWL_FIRST_OFDM_RATE
;
216 /* For 2.4 GHZ band, check that there is no need to remap */
217 BUILD_BUG_ON(IWL_FIRST_CCK_RATE
!= 0);
219 /* Get PLCP rate for tx_cmd->rate_n_flags */
220 rate_plcp
= iwl_mvm_mac80211_idx_to_hwrate(rate_idx
);
222 mvm
->mgmt_last_antenna_idx
=
223 iwl_mvm_next_antenna(mvm
, iwl_mvm_get_valid_tx_ant(mvm
),
224 mvm
->mgmt_last_antenna_idx
);
226 if (info
->band
== IEEE80211_BAND_2GHZ
&&
227 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm
))
228 rate_flags
= BIT(mvm
->cfg
->non_shared_ant
) << RATE_MCS_ANT_POS
;
231 BIT(mvm
->mgmt_last_antenna_idx
) << RATE_MCS_ANT_POS
;
233 /* Set CCK flag as needed */
234 if ((rate_idx
>= IWL_FIRST_CCK_RATE
) && (rate_idx
<= IWL_LAST_CCK_RATE
))
235 rate_flags
|= RATE_MCS_CCK_MSK
;
237 /* Set the rate in the TX cmd */
238 tx_cmd
->rate_n_flags
= cpu_to_le32((u32
)rate_plcp
| rate_flags
);
242 * Sets the fields in the Tx cmd that are crypto related
244 void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm
*mvm
,
245 struct ieee80211_tx_info
*info
,
246 struct iwl_tx_cmd
*tx_cmd
,
247 struct sk_buff
*skb_frag
)
249 struct ieee80211_key_conf
*keyconf
= info
->control
.hw_key
;
251 switch (keyconf
->cipher
) {
252 case WLAN_CIPHER_SUITE_CCMP
:
253 tx_cmd
->sec_ctl
= TX_CMD_SEC_CCM
;
254 memcpy(tx_cmd
->key
, keyconf
->key
, keyconf
->keylen
);
255 if (info
->flags
& IEEE80211_TX_CTL_AMPDU
)
256 tx_cmd
->tx_flags
|= cpu_to_le32(TX_CMD_FLG_CCMP_AGG
);
259 case WLAN_CIPHER_SUITE_TKIP
:
260 tx_cmd
->sec_ctl
= TX_CMD_SEC_TKIP
;
261 ieee80211_get_tkip_p2k(keyconf
, skb_frag
, tx_cmd
->key
);
264 case WLAN_CIPHER_SUITE_WEP104
:
265 tx_cmd
->sec_ctl
|= TX_CMD_SEC_KEY128
;
267 case WLAN_CIPHER_SUITE_WEP40
:
268 tx_cmd
->sec_ctl
|= TX_CMD_SEC_WEP
|
269 ((keyconf
->keyidx
<< TX_CMD_SEC_WEP_KEY_IDX_POS
) &
270 TX_CMD_SEC_WEP_KEY_IDX_MSK
);
272 memcpy(&tx_cmd
->key
[3], keyconf
->key
, keyconf
->keylen
);
275 tx_cmd
->sec_ctl
|= TX_CMD_SEC_EXT
;
280 * Allocates and sets the Tx cmd the driver data pointers in the skb
282 static struct iwl_device_cmd
*
283 iwl_mvm_set_tx_params(struct iwl_mvm
*mvm
, struct sk_buff
*skb
,
284 struct ieee80211_sta
*sta
, u8 sta_id
)
286 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
287 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
288 struct iwl_device_cmd
*dev_cmd
;
289 struct iwl_tx_cmd
*tx_cmd
;
291 dev_cmd
= iwl_trans_alloc_tx_cmd(mvm
->trans
);
293 if (unlikely(!dev_cmd
))
296 memset(dev_cmd
, 0, sizeof(*dev_cmd
));
297 dev_cmd
->hdr
.cmd
= TX_CMD
;
298 tx_cmd
= (struct iwl_tx_cmd
*)dev_cmd
->payload
;
300 if (info
->control
.hw_key
)
301 iwl_mvm_set_tx_cmd_crypto(mvm
, info
, tx_cmd
, skb
);
303 iwl_mvm_set_tx_cmd(mvm
, skb
, tx_cmd
, info
, sta_id
);
305 iwl_mvm_set_tx_cmd_rate(mvm
, tx_cmd
, info
, sta
, hdr
->frame_control
);
307 memset(&info
->status
, 0, sizeof(info
->status
));
309 info
->driver_data
[0] = NULL
;
310 info
->driver_data
[1] = dev_cmd
;
315 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm
*mvm
, struct sk_buff
*skb
)
317 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
318 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
319 struct iwl_device_cmd
*dev_cmd
;
320 struct iwl_tx_cmd
*tx_cmd
;
323 if (WARN_ON_ONCE(info
->flags
& IEEE80211_TX_CTL_AMPDU
))
326 if (WARN_ON_ONCE(info
->flags
& IEEE80211_TX_CTL_SEND_AFTER_DTIM
&&
327 (!info
->control
.vif
||
328 info
->hw_queue
!= info
->control
.vif
->cab_queue
)))
332 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used
333 * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel
334 * queue. STATION (HS2.0) uses the auxiliary context of the FW,
335 * and hence needs to be sent on the aux queue
337 if (IEEE80211_SKB_CB(skb
)->hw_queue
== IWL_MVM_OFFCHANNEL_QUEUE
&&
338 info
->control
.vif
->type
== NL80211_IFTYPE_STATION
)
339 IEEE80211_SKB_CB(skb
)->hw_queue
= mvm
->aux_queue
;
342 * If the interface on which frame is sent is the P2P_DEVICE
343 * or an AP/GO interface use the broadcast station associated
344 * with it; otherwise use the AUX station.
346 if (info
->control
.vif
&&
347 (info
->control
.vif
->type
== NL80211_IFTYPE_P2P_DEVICE
||
348 info
->control
.vif
->type
== NL80211_IFTYPE_AP
)) {
349 struct iwl_mvm_vif
*mvmvif
=
350 iwl_mvm_vif_from_mac80211(info
->control
.vif
);
351 sta_id
= mvmvif
->bcast_sta
.sta_id
;
353 sta_id
= mvm
->aux_sta
.sta_id
;
356 IWL_DEBUG_TX(mvm
, "station Id %d, queue=%d\n", sta_id
, info
->hw_queue
);
358 dev_cmd
= iwl_mvm_set_tx_params(mvm
, skb
, NULL
, sta_id
);
362 /* From now on, we cannot access info->control */
363 tx_cmd
= (struct iwl_tx_cmd
*)dev_cmd
->payload
;
365 /* Copy MAC header from skb into command buffer */
366 memcpy(tx_cmd
->hdr
, hdr
, ieee80211_hdrlen(hdr
->frame_control
));
368 if (iwl_trans_tx(mvm
->trans
, skb
, dev_cmd
, info
->hw_queue
)) {
369 iwl_trans_free_tx_cmd(mvm
->trans
, dev_cmd
);
377 * Sets the fields in the Tx cmd that are crypto related
379 int iwl_mvm_tx_skb(struct iwl_mvm
*mvm
, struct sk_buff
*skb
,
380 struct ieee80211_sta
*sta
)
382 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
383 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
384 struct iwl_mvm_sta
*mvmsta
;
385 struct iwl_device_cmd
*dev_cmd
;
386 struct iwl_tx_cmd
*tx_cmd
;
389 u8 tid
= IWL_MAX_TID_COUNT
;
390 u8 txq_id
= info
->hw_queue
;
391 bool is_data_qos
= false, is_ampdu
= false;
393 mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
394 fc
= hdr
->frame_control
;
396 if (WARN_ON_ONCE(!mvmsta
))
399 if (WARN_ON_ONCE(mvmsta
->sta_id
== IWL_MVM_STATION_COUNT
))
402 dev_cmd
= iwl_mvm_set_tx_params(mvm
, skb
, sta
, mvmsta
->sta_id
);
406 tx_cmd
= (struct iwl_tx_cmd
*)dev_cmd
->payload
;
407 /* From now on, we cannot access info->control */
410 * we handle that entirely ourselves -- for uAPSD the firmware
411 * will always send a notification, and for PS-Poll responses
412 * we'll notify mac80211 when getting frame status
414 info
->flags
&= ~IEEE80211_TX_STATUS_EOSP
;
416 spin_lock(&mvmsta
->lock
);
418 if (ieee80211_is_data_qos(fc
) && !ieee80211_is_qos_nullfunc(fc
)) {
420 qc
= ieee80211_get_qos_ctl(hdr
);
421 tid
= qc
[0] & IEEE80211_QOS_CTL_TID_MASK
;
422 if (WARN_ON_ONCE(tid
>= IWL_MAX_TID_COUNT
))
423 goto drop_unlock_sta
;
425 seq_number
= mvmsta
->tid_data
[tid
].seq_number
;
426 seq_number
&= IEEE80211_SCTL_SEQ
;
427 hdr
->seq_ctrl
&= cpu_to_le16(IEEE80211_SCTL_FRAG
);
428 hdr
->seq_ctrl
|= cpu_to_le16(seq_number
);
430 is_ampdu
= info
->flags
& IEEE80211_TX_CTL_AMPDU
;
433 /* Copy MAC header from skb into command buffer */
434 memcpy(tx_cmd
->hdr
, hdr
, ieee80211_hdrlen(fc
));
436 WARN_ON_ONCE(info
->flags
& IEEE80211_TX_CTL_SEND_AFTER_DTIM
);
439 /* default to TID 0 for non-QoS packets */
440 u8 tdls_tid
= tid
== IWL_MAX_TID_COUNT
? 0 : tid
;
442 txq_id
= mvmsta
->hw_queue
[tid_to_mac80211_ac
[tdls_tid
]];
446 if (WARN_ON_ONCE(mvmsta
->tid_data
[tid
].state
!= IWL_AGG_ON
))
447 goto drop_unlock_sta
;
448 txq_id
= mvmsta
->tid_data
[tid
].txq_id
;
451 IWL_DEBUG_TX(mvm
, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta
->sta_id
,
452 tid
, txq_id
, IEEE80211_SEQ_TO_SN(seq_number
));
454 if (iwl_trans_tx(mvm
->trans
, skb
, dev_cmd
, txq_id
))
455 goto drop_unlock_sta
;
457 if (is_data_qos
&& !ieee80211_has_morefrags(fc
))
458 mvmsta
->tid_data
[tid
].seq_number
= seq_number
+ 0x10;
460 spin_unlock(&mvmsta
->lock
);
462 if (txq_id
< mvm
->first_agg_queue
)
463 atomic_inc(&mvm
->pending_frames
[mvmsta
->sta_id
]);
468 iwl_trans_free_tx_cmd(mvm
->trans
, dev_cmd
);
469 spin_unlock(&mvmsta
->lock
);
474 static void iwl_mvm_check_ratid_empty(struct iwl_mvm
*mvm
,
475 struct ieee80211_sta
*sta
, u8 tid
)
477 struct iwl_mvm_sta
*mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
478 struct iwl_mvm_tid_data
*tid_data
= &mvmsta
->tid_data
[tid
];
479 struct ieee80211_vif
*vif
= mvmsta
->vif
;
481 lockdep_assert_held(&mvmsta
->lock
);
483 if ((tid_data
->state
== IWL_AGG_ON
||
484 tid_data
->state
== IWL_EMPTYING_HW_QUEUE_DELBA
) &&
485 iwl_mvm_tid_queued(tid_data
) == 0) {
487 * Now that this aggregation queue is empty tell mac80211 so it
488 * knows we no longer have frames buffered for the station on
489 * this TID (for the TIM bitmap calculation.)
491 ieee80211_sta_set_buffered(sta
, tid
, false);
494 if (tid_data
->ssn
!= tid_data
->next_reclaimed
)
497 switch (tid_data
->state
) {
498 case IWL_EMPTYING_HW_QUEUE_ADDBA
:
499 IWL_DEBUG_TX_QUEUES(mvm
,
500 "Can continue addBA flow ssn = next_recl = %d\n",
501 tid_data
->next_reclaimed
);
502 tid_data
->state
= IWL_AGG_STARTING
;
503 ieee80211_start_tx_ba_cb_irqsafe(vif
, sta
->addr
, tid
);
506 case IWL_EMPTYING_HW_QUEUE_DELBA
:
507 IWL_DEBUG_TX_QUEUES(mvm
,
508 "Can continue DELBA flow ssn = next_recl = %d\n",
509 tid_data
->next_reclaimed
);
510 iwl_mvm_disable_txq(mvm
, tid_data
->txq_id
, CMD_ASYNC
);
511 tid_data
->state
= IWL_AGG_OFF
;
513 * we can't hold the mutex - but since we are after a sequence
514 * point (call to iwl_mvm_disable_txq(), so we don't even need
517 mvm
->queue_to_mac80211
[tid_data
->txq_id
] =
518 IWL_INVALID_MAC80211_QUEUE
;
519 ieee80211_stop_tx_ba_cb_irqsafe(vif
, sta
->addr
, tid
);
527 #ifdef CONFIG_IWLWIFI_DEBUG
528 const char *iwl_mvm_get_tx_fail_reason(u32 status
)
530 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
531 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
533 switch (status
& TX_STATUS_MSK
) {
534 case TX_STATUS_SUCCESS
:
536 TX_STATUS_POSTPONE(DELAY
);
537 TX_STATUS_POSTPONE(FEW_BYTES
);
538 TX_STATUS_POSTPONE(BT_PRIO
);
539 TX_STATUS_POSTPONE(QUIET_PERIOD
);
540 TX_STATUS_POSTPONE(CALC_TTAK
);
541 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY
);
542 TX_STATUS_FAIL(SHORT_LIMIT
);
543 TX_STATUS_FAIL(LONG_LIMIT
);
544 TX_STATUS_FAIL(UNDERRUN
);
545 TX_STATUS_FAIL(DRAIN_FLOW
);
546 TX_STATUS_FAIL(RFKILL_FLUSH
);
547 TX_STATUS_FAIL(LIFE_EXPIRE
);
548 TX_STATUS_FAIL(DEST_PS
);
549 TX_STATUS_FAIL(HOST_ABORTED
);
550 TX_STATUS_FAIL(BT_RETRY
);
551 TX_STATUS_FAIL(STA_INVALID
);
552 TX_STATUS_FAIL(FRAG_DROPPED
);
553 TX_STATUS_FAIL(TID_DISABLE
);
554 TX_STATUS_FAIL(FIFO_FLUSHED
);
555 TX_STATUS_FAIL(SMALL_CF_POLL
);
556 TX_STATUS_FAIL(FW_DROP
);
557 TX_STATUS_FAIL(STA_COLOR_MISMATCH
);
562 #undef TX_STATUS_FAIL
563 #undef TX_STATUS_POSTPONE
565 #endif /* CONFIG_IWLWIFI_DEBUG */
567 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags
,
568 enum ieee80211_band band
,
569 struct ieee80211_tx_rate
*r
)
571 if (rate_n_flags
& RATE_HT_MCS_GF_MSK
)
572 r
->flags
|= IEEE80211_TX_RC_GREEN_FIELD
;
573 switch (rate_n_flags
& RATE_MCS_CHAN_WIDTH_MSK
) {
574 case RATE_MCS_CHAN_WIDTH_20
:
576 case RATE_MCS_CHAN_WIDTH_40
:
577 r
->flags
|= IEEE80211_TX_RC_40_MHZ_WIDTH
;
579 case RATE_MCS_CHAN_WIDTH_80
:
580 r
->flags
|= IEEE80211_TX_RC_80_MHZ_WIDTH
;
582 case RATE_MCS_CHAN_WIDTH_160
:
583 r
->flags
|= IEEE80211_TX_RC_160_MHZ_WIDTH
;
586 if (rate_n_flags
& RATE_MCS_SGI_MSK
)
587 r
->flags
|= IEEE80211_TX_RC_SHORT_GI
;
588 if (rate_n_flags
& RATE_MCS_HT_MSK
) {
589 r
->flags
|= IEEE80211_TX_RC_MCS
;
590 r
->idx
= rate_n_flags
& RATE_HT_MCS_INDEX_MSK
;
591 } else if (rate_n_flags
& RATE_MCS_VHT_MSK
) {
592 ieee80211_rate_set_vht(
593 r
, rate_n_flags
& RATE_VHT_MCS_RATE_CODE_MSK
,
594 ((rate_n_flags
& RATE_VHT_MCS_NSS_MSK
) >>
595 RATE_VHT_MCS_NSS_POS
) + 1);
596 r
->flags
|= IEEE80211_TX_RC_VHT_MCS
;
598 r
->idx
= iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags
,
604 * translate ucode response to mac80211 tx status control values
606 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags
,
607 struct ieee80211_tx_info
*info
)
609 struct ieee80211_tx_rate
*r
= &info
->status
.rates
[0];
611 info
->status
.antenna
=
612 ((rate_n_flags
& RATE_MCS_ANT_ABC_MSK
) >> RATE_MCS_ANT_POS
);
613 iwl_mvm_hwrate_to_tx_rate(rate_n_flags
, info
->band
, r
);
616 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm
*mvm
,
617 struct iwl_rx_packet
*pkt
)
619 struct ieee80211_sta
*sta
;
620 u16 sequence
= le16_to_cpu(pkt
->hdr
.sequence
);
621 int txq_id
= SEQ_TO_QUEUE(sequence
);
622 struct iwl_mvm_tx_resp
*tx_resp
= (void *)pkt
->data
;
623 int sta_id
= IWL_MVM_TX_RES_GET_RA(tx_resp
->ra_tid
);
624 int tid
= IWL_MVM_TX_RES_GET_TID(tx_resp
->ra_tid
);
625 u32 status
= le16_to_cpu(tx_resp
->status
.status
);
626 u16 ssn
= iwl_mvm_get_scd_ssn(tx_resp
);
627 struct iwl_mvm_sta
*mvmsta
;
628 struct sk_buff_head skbs
;
630 u16 next_reclaimed
, seq_ctl
;
632 __skb_queue_head_init(&skbs
);
634 seq_ctl
= le16_to_cpu(tx_resp
->seq_ctl
);
636 /* we can free until ssn % q.n_bd not inclusive */
637 iwl_trans_reclaim(mvm
->trans
, txq_id
, ssn
, &skbs
);
639 while (!skb_queue_empty(&skbs
)) {
640 struct sk_buff
*skb
= __skb_dequeue(&skbs
);
641 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
645 iwl_trans_free_tx_cmd(mvm
->trans
, info
->driver_data
[1]);
647 memset(&info
->status
, 0, sizeof(info
->status
));
649 info
->flags
&= ~IEEE80211_TX_CTL_AMPDU
;
651 /* inform mac80211 about what happened with the frame */
652 switch (status
& TX_STATUS_MSK
) {
653 case TX_STATUS_SUCCESS
:
654 case TX_STATUS_DIRECT_DONE
:
655 info
->flags
|= IEEE80211_TX_STAT_ACK
;
657 case TX_STATUS_FAIL_DEST_PS
:
658 info
->flags
|= IEEE80211_TX_STAT_TX_FILTERED
;
664 info
->status
.rates
[0].count
= tx_resp
->failure_frame
+ 1;
665 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp
->initial_rate
),
667 info
->status
.status_driver_data
[1] =
668 (void *)(uintptr_t)le32_to_cpu(tx_resp
->initial_rate
);
670 /* Single frame failure in an AMPDU queue => send BAR */
671 if (txq_id
>= mvm
->first_agg_queue
&&
672 !(info
->flags
& IEEE80211_TX_STAT_ACK
) &&
673 !(info
->flags
& IEEE80211_TX_STAT_TX_FILTERED
))
674 info
->flags
|= IEEE80211_TX_STAT_AMPDU_NO_BACK
;
676 /* W/A FW bug: seq_ctl is wrong when the status isn't success */
677 if (status
!= TX_STATUS_SUCCESS
) {
678 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
679 seq_ctl
= le16_to_cpu(hdr
->seq_ctrl
);
683 * TODO: this is not accurate if we are freeing more than one
686 info
->status
.tx_time
=
687 le16_to_cpu(tx_resp
->wireless_media_time
);
688 BUILD_BUG_ON(ARRAY_SIZE(info
->status
.status_driver_data
) < 1);
689 info
->status
.status_driver_data
[0] =
690 (void *)(uintptr_t)tx_resp
->reduced_tpc
;
692 ieee80211_tx_status(mvm
->hw
, skb
);
695 if (txq_id
>= mvm
->first_agg_queue
) {
696 /* If this is an aggregation queue, we use the ssn since:
697 * ssn = wifi seq_num % 256.
698 * The seq_ctl is the sequence control of the packet to which
699 * this Tx response relates. But if there is a hole in the
700 * bitmap of the BA we received, this Tx response may allow to
701 * reclaim the hole and all the subsequent packets that were
702 * already acked. In that case, seq_ctl != ssn, and the next
703 * packet to be reclaimed will be ssn and not seq_ctl. In that
704 * case, several packets will be reclaimed even if
707 * The ssn is the index (% 256) of the latest packet that has
708 * treated (acked / dropped) + 1.
710 next_reclaimed
= ssn
;
712 /* The next packet to be reclaimed is the one after this one */
713 next_reclaimed
= IEEE80211_SEQ_TO_SN(seq_ctl
+ 0x10);
716 IWL_DEBUG_TX_REPLY(mvm
,
717 "TXQ %d status %s (0x%08x)\n",
718 txq_id
, iwl_mvm_get_tx_fail_reason(status
), status
);
720 IWL_DEBUG_TX_REPLY(mvm
,
721 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
722 le32_to_cpu(tx_resp
->initial_rate
),
723 tx_resp
->failure_frame
, SEQ_TO_INDEX(sequence
),
724 ssn
, next_reclaimed
, seq_ctl
);
728 sta
= rcu_dereference(mvm
->fw_id_to_mac_id
[sta_id
]);
730 * sta can't be NULL otherwise it'd mean that the sta has been freed in
731 * the firmware while we still have packets for it in the Tx queues.
733 if (WARN_ON_ONCE(!sta
))
737 mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
739 if (tid
!= IWL_TID_NON_QOS
) {
740 struct iwl_mvm_tid_data
*tid_data
=
741 &mvmsta
->tid_data
[tid
];
743 spin_lock_bh(&mvmsta
->lock
);
744 tid_data
->next_reclaimed
= next_reclaimed
;
745 IWL_DEBUG_TX_REPLY(mvm
, "Next reclaimed packet:%d\n",
747 iwl_mvm_check_ratid_empty(mvm
, sta
, tid
);
748 spin_unlock_bh(&mvmsta
->lock
);
751 if (mvmsta
->next_status_eosp
) {
752 mvmsta
->next_status_eosp
= false;
753 ieee80211_sta_eosp(sta
);
760 * If the txq is not an AMPDU queue, there is no chance we freed
761 * several skbs. Check that out...
763 if (txq_id
>= mvm
->first_agg_queue
)
766 /* We can't free more than one frame at once on a shared queue */
767 WARN_ON(skb_freed
> 1);
769 /* If we have still frames for this STA nothing to do here */
770 if (!atomic_sub_and_test(skb_freed
, &mvm
->pending_frames
[sta_id
]))
773 if (mvmsta
&& mvmsta
->vif
->type
== NL80211_IFTYPE_AP
) {
776 * If there are no pending frames for this STA and
777 * the tx to this station is not disabled, notify
778 * mac80211 that this station can now wake up in its
780 * If mvmsta is not NULL, sta is valid.
783 spin_lock_bh(&mvmsta
->lock
);
785 if (!mvmsta
->disable_tx
)
786 ieee80211_sta_block_awake(mvm
->hw
, sta
, false);
788 spin_unlock_bh(&mvmsta
->lock
);
791 if (PTR_ERR(sta
) == -EBUSY
|| PTR_ERR(sta
) == -ENOENT
) {
793 * We are draining and this was the last packet - pre_rcu_remove
794 * has been called already. We might be after the
795 * synchronize_net already.
796 * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues.
798 set_bit(sta_id
, mvm
->sta_drained
);
799 schedule_work(&mvm
->sta_drained_wk
);
806 #ifdef CONFIG_IWLWIFI_DEBUG
807 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
808 static const char *iwl_get_agg_tx_status(u16 status
)
810 switch (status
& AGG_TX_STATE_STATUS_MSK
) {
811 AGG_TX_STATE_(TRANSMITTED
);
812 AGG_TX_STATE_(UNDERRUN
);
813 AGG_TX_STATE_(BT_PRIO
);
814 AGG_TX_STATE_(FEW_BYTES
);
815 AGG_TX_STATE_(ABORT
);
816 AGG_TX_STATE_(LAST_SENT_TTL
);
817 AGG_TX_STATE_(LAST_SENT_TRY_CNT
);
818 AGG_TX_STATE_(LAST_SENT_BT_KILL
);
819 AGG_TX_STATE_(SCD_QUERY
);
820 AGG_TX_STATE_(TEST_BAD_CRC32
);
821 AGG_TX_STATE_(RESPONSE
);
822 AGG_TX_STATE_(DUMP_TX
);
823 AGG_TX_STATE_(DELAY_TX
);
829 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm
*mvm
,
830 struct iwl_rx_packet
*pkt
)
832 struct iwl_mvm_tx_resp
*tx_resp
= (void *)pkt
->data
;
833 struct agg_tx_status
*frame_status
= &tx_resp
->status
;
836 for (i
= 0; i
< tx_resp
->frame_count
; i
++) {
837 u16 fstatus
= le16_to_cpu(frame_status
[i
].status
);
839 IWL_DEBUG_TX_REPLY(mvm
,
840 "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
841 iwl_get_agg_tx_status(fstatus
),
842 fstatus
& AGG_TX_STATE_STATUS_MSK
,
843 (fstatus
& AGG_TX_STATE_TRY_CNT_MSK
) >>
844 AGG_TX_STATE_TRY_CNT_POS
,
845 le16_to_cpu(frame_status
[i
].sequence
));
849 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm
*mvm
,
850 struct iwl_rx_packet
*pkt
)
852 #endif /* CONFIG_IWLWIFI_DEBUG */
854 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm
*mvm
,
855 struct iwl_rx_packet
*pkt
)
857 struct iwl_mvm_tx_resp
*tx_resp
= (void *)pkt
->data
;
858 int sta_id
= IWL_MVM_TX_RES_GET_RA(tx_resp
->ra_tid
);
859 int tid
= IWL_MVM_TX_RES_GET_TID(tx_resp
->ra_tid
);
860 u16 sequence
= le16_to_cpu(pkt
->hdr
.sequence
);
861 struct ieee80211_sta
*sta
;
863 if (WARN_ON_ONCE(SEQ_TO_QUEUE(sequence
) < mvm
->first_agg_queue
))
866 if (WARN_ON_ONCE(tid
== IWL_TID_NON_QOS
))
869 iwl_mvm_rx_tx_cmd_agg_dbg(mvm
, pkt
);
873 sta
= rcu_dereference(mvm
->fw_id_to_mac_id
[sta_id
]);
875 if (!WARN_ON_ONCE(IS_ERR_OR_NULL(sta
))) {
876 struct iwl_mvm_sta
*mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
877 mvmsta
->tid_data
[tid
].rate_n_flags
=
878 le32_to_cpu(tx_resp
->initial_rate
);
879 mvmsta
->tid_data
[tid
].reduced_tpc
= tx_resp
->reduced_tpc
;
880 mvmsta
->tid_data
[tid
].tx_time
=
881 le16_to_cpu(tx_resp
->wireless_media_time
);
887 int iwl_mvm_rx_tx_cmd(struct iwl_mvm
*mvm
, struct iwl_rx_cmd_buffer
*rxb
,
888 struct iwl_device_cmd
*cmd
)
890 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
891 struct iwl_mvm_tx_resp
*tx_resp
= (void *)pkt
->data
;
893 if (tx_resp
->frame_count
== 1)
894 iwl_mvm_rx_tx_cmd_single(mvm
, pkt
);
896 iwl_mvm_rx_tx_cmd_agg(mvm
, pkt
);
901 static void iwl_mvm_tx_info_from_ba_notif(struct ieee80211_tx_info
*info
,
902 struct iwl_mvm_ba_notif
*ba_notif
,
903 struct iwl_mvm_tid_data
*tid_data
)
905 info
->flags
|= IEEE80211_TX_STAT_AMPDU
;
906 info
->status
.ampdu_ack_len
= ba_notif
->txed_2_done
;
907 info
->status
.ampdu_len
= ba_notif
->txed
;
908 iwl_mvm_hwrate_to_tx_status(tid_data
->rate_n_flags
,
910 /* TODO: not accounted if the whole A-MPDU failed */
911 info
->status
.tx_time
= tid_data
->tx_time
;
912 info
->status
.status_driver_data
[0] =
913 (void *)(uintptr_t)tid_data
->reduced_tpc
;
914 info
->status
.status_driver_data
[1] =
915 (void *)(uintptr_t)tid_data
->rate_n_flags
;
918 int iwl_mvm_rx_ba_notif(struct iwl_mvm
*mvm
, struct iwl_rx_cmd_buffer
*rxb
,
919 struct iwl_device_cmd
*cmd
)
921 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
922 struct iwl_mvm_ba_notif
*ba_notif
= (void *)pkt
->data
;
923 struct sk_buff_head reclaimed_skbs
;
924 struct iwl_mvm_tid_data
*tid_data
;
925 struct ieee80211_sta
*sta
;
926 struct iwl_mvm_sta
*mvmsta
;
928 int sta_id
, tid
, freed
;
929 /* "flow" corresponds to Tx queue */
930 u16 scd_flow
= le16_to_cpu(ba_notif
->scd_flow
);
931 /* "ssn" is start of block-ack Tx window, corresponds to index
932 * (in Tx queue's circular buffer) of first TFD/frame in window */
933 u16 ba_resp_scd_ssn
= le16_to_cpu(ba_notif
->scd_ssn
);
935 sta_id
= ba_notif
->sta_id
;
938 if (WARN_ONCE(sta_id
>= IWL_MVM_STATION_COUNT
||
939 tid
>= IWL_MAX_TID_COUNT
,
940 "sta_id %d tid %d", sta_id
, tid
))
945 sta
= rcu_dereference(mvm
->fw_id_to_mac_id
[sta_id
]);
947 /* Reclaiming frames for a station that has been deleted ? */
948 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta
))) {
953 mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
954 tid_data
= &mvmsta
->tid_data
[tid
];
956 if (WARN_ONCE(tid_data
->txq_id
!= scd_flow
, "Q %d, tid %d, flow %d",
957 tid_data
->txq_id
, tid
, scd_flow
)) {
962 spin_lock_bh(&mvmsta
->lock
);
964 __skb_queue_head_init(&reclaimed_skbs
);
967 * Release all TFDs before the SSN, i.e. all TFDs in front of
968 * block-ack window (we assume that they've been successfully
969 * transmitted ... if not, it's too late anyway).
971 iwl_trans_reclaim(mvm
->trans
, scd_flow
, ba_resp_scd_ssn
,
974 IWL_DEBUG_TX_REPLY(mvm
,
975 "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
976 (u8
*)&ba_notif
->sta_addr_lo32
,
978 IWL_DEBUG_TX_REPLY(mvm
,
979 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
980 ba_notif
->tid
, le16_to_cpu(ba_notif
->seq_ctl
),
981 (unsigned long long)le64_to_cpu(ba_notif
->bitmap
),
982 scd_flow
, ba_resp_scd_ssn
, ba_notif
->txed
,
983 ba_notif
->txed_2_done
);
985 tid_data
->next_reclaimed
= ba_resp_scd_ssn
;
987 iwl_mvm_check_ratid_empty(mvm
, sta
, tid
);
991 skb_queue_walk(&reclaimed_skbs
, skb
) {
992 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
993 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
995 if (ieee80211_is_data_qos(hdr
->frame_control
))
1000 iwl_trans_free_tx_cmd(mvm
->trans
, info
->driver_data
[1]);
1002 memset(&info
->status
, 0, sizeof(info
->status
));
1003 /* Packet was transmitted successfully, failures come as single
1004 * frames because before failing a frame the firmware transmits
1005 * it without aggregation at least once.
1007 info
->flags
|= IEEE80211_TX_STAT_ACK
;
1009 /* this is the first skb we deliver in this batch */
1010 /* put the rate scaling data there */
1012 iwl_mvm_tx_info_from_ba_notif(info
, ba_notif
, tid_data
);
1015 spin_unlock_bh(&mvmsta
->lock
);
1017 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
1018 * possible (i.e. first MPDU in the aggregation wasn't acked)
1019 * Still it's important to update RS about sent vs. acked.
1021 if (skb_queue_empty(&reclaimed_skbs
)) {
1022 struct ieee80211_tx_info ba_info
= {};
1023 struct ieee80211_chanctx_conf
*chanctx_conf
= NULL
;
1027 rcu_dereference(mvmsta
->vif
->chanctx_conf
);
1029 if (WARN_ON_ONCE(!chanctx_conf
))
1032 ba_info
.band
= chanctx_conf
->def
.chan
->band
;
1033 iwl_mvm_tx_info_from_ba_notif(&ba_info
, ba_notif
, tid_data
);
1035 IWL_DEBUG_TX_REPLY(mvm
, "No reclaim. Update rs directly\n");
1036 iwl_mvm_rs_tx_status(mvm
, sta
, tid
, &ba_info
);
1042 while (!skb_queue_empty(&reclaimed_skbs
)) {
1043 skb
= __skb_dequeue(&reclaimed_skbs
);
1044 ieee80211_tx_status(mvm
->hw
, skb
);
1050 int iwl_mvm_flush_tx_path(struct iwl_mvm
*mvm
, u32 tfd_msk
, bool sync
)
1053 struct iwl_tx_path_flush_cmd flush_cmd
= {
1054 .queues_ctl
= cpu_to_le32(tfd_msk
),
1055 .flush_ctl
= cpu_to_le16(DUMP_TX_FIFO_FLUSH
),
1058 u32 flags
= sync
? 0 : CMD_ASYNC
;
1060 ret
= iwl_mvm_send_cmd_pdu(mvm
, TXPATH_FLUSH
, flags
,
1061 sizeof(flush_cmd
), &flush_cmd
);
1063 IWL_ERR(mvm
, "Failed to send flush command (%d)\n", ret
);