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
10 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of version 2 of the GNU General Public License as
14 * published by the Free Software Foundation.
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
26 * The full GNU General Public License is included in this distribution
27 * in the file called COPYING.
29 * Contact Information:
30 * Intel Linux Wireless <linuxwifi@intel.com>
31 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
35 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
36 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
37 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
38 * All rights reserved.
40 * Redistribution and use in source and binary forms, with or without
41 * modification, are permitted provided that the following conditions
44 * * Redistributions of source code must retain the above copyright
45 * notice, this list of conditions and the following disclaimer.
46 * * Redistributions in binary form must reproduce the above copyright
47 * notice, this list of conditions and the following disclaimer in
48 * the documentation and/or other materials provided with the
50 * * Neither the name Intel Corporation nor the names of its
51 * contributors may be used to endorse or promote products derived
52 * from this software without specific prior written permission.
54 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
55 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
56 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
57 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
58 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
59 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
60 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
61 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
62 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
63 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
64 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
66 *****************************************************************************/
67 #include <linux/ieee80211.h>
68 #include <linux/etherdevice.h>
69 #include <linux/tcp.h>
73 #include "iwl-trans.h"
74 #include "iwl-eeprom-parse.h"
80 iwl_mvm_bar_check_trigger(struct iwl_mvm
*mvm
, const u8
*addr
,
83 struct iwl_fw_dbg_trigger_tlv
*trig
;
84 struct iwl_fw_dbg_trigger_ba
*ba_trig
;
86 if (!iwl_fw_dbg_trigger_enabled(mvm
->fw
, FW_DBG_TRIGGER_BA
))
89 trig
= iwl_fw_dbg_get_trigger(mvm
->fw
, FW_DBG_TRIGGER_BA
);
90 ba_trig
= (void *)trig
->data
;
92 if (!iwl_fw_dbg_trigger_check_stop(mvm
, NULL
, trig
))
95 if (!(le16_to_cpu(ba_trig
->tx_bar
) & BIT(tid
)))
98 iwl_mvm_fw_dbg_collect_trig(mvm
, trig
,
99 "BAR sent to %pM, tid %d, ssn %d",
103 #define OPT_HDR(type, skb, off) \
104 (type *)(skb_network_header(skb) + (off))
106 static u16
iwl_mvm_tx_csum(struct iwl_mvm
*mvm
, struct sk_buff
*skb
,
107 struct ieee80211_hdr
*hdr
,
108 struct ieee80211_tx_info
*info
,
111 #if IS_ENABLED(CONFIG_INET)
112 u16 mh_len
= ieee80211_hdrlen(hdr
->frame_control
);
116 * Do not compute checksum if already computed or if transport will
119 if (skb
->ip_summed
!= CHECKSUM_PARTIAL
|| IWL_MVM_SW_TX_CSUM_OFFLOAD
)
122 /* We do not expect to be requested to csum stuff we do not support */
123 if (WARN_ONCE(!(mvm
->hw
->netdev_features
& IWL_TX_CSUM_NETIF_FLAGS
) ||
124 (skb
->protocol
!= htons(ETH_P_IP
) &&
125 skb
->protocol
!= htons(ETH_P_IPV6
)),
126 "No support for requested checksum\n")) {
127 skb_checksum_help(skb
);
131 if (skb
->protocol
== htons(ETH_P_IP
)) {
132 protocol
= ip_hdr(skb
)->protocol
;
134 #if IS_ENABLED(CONFIG_IPV6)
135 struct ipv6hdr
*ipv6h
=
136 (struct ipv6hdr
*)skb_network_header(skb
);
137 unsigned int off
= sizeof(*ipv6h
);
139 protocol
= ipv6h
->nexthdr
;
140 while (protocol
!= NEXTHDR_NONE
&& ipv6_ext_hdr(protocol
)) {
141 struct ipv6_opt_hdr
*hp
;
143 /* only supported extension headers */
144 if (protocol
!= NEXTHDR_ROUTING
&&
145 protocol
!= NEXTHDR_HOP
&&
146 protocol
!= NEXTHDR_DEST
) {
147 skb_checksum_help(skb
);
151 hp
= OPT_HDR(struct ipv6_opt_hdr
, skb
, off
);
152 protocol
= hp
->nexthdr
;
153 off
+= ipv6_optlen(hp
);
155 /* if we get here - protocol now should be TCP/UDP */
159 if (protocol
!= IPPROTO_TCP
&& protocol
!= IPPROTO_UDP
) {
161 skb_checksum_help(skb
);
166 offload_assist
|= BIT(TX_CMD_OFFLD_L4_EN
);
169 * Set offset to IP header (snap).
170 * We don't support tunneling so no need to take care of inner header.
173 offload_assist
|= (4 << TX_CMD_OFFLD_IP_HDR
);
175 /* Do IPv4 csum for AMSDU only (no IP csum for Ipv6) */
176 if (skb
->protocol
== htons(ETH_P_IP
) &&
177 (offload_assist
& BIT(TX_CMD_OFFLD_AMSDU
))) {
178 ip_hdr(skb
)->check
= 0;
179 offload_assist
|= BIT(TX_CMD_OFFLD_L3_EN
);
182 /* reset UDP/TCP header csum */
183 if (protocol
== IPPROTO_TCP
)
184 tcp_hdr(skb
)->check
= 0;
186 udp_hdr(skb
)->check
= 0;
189 * mac header len should include IV, size is in words unless
190 * the IV is added by the firmware like in WEP.
191 * In new Tx API, the IV is always added by the firmware.
193 if (!iwl_mvm_has_new_tx_api(mvm
) && info
->control
.hw_key
&&
194 info
->control
.hw_key
->cipher
!= WLAN_CIPHER_SUITE_WEP40
&&
195 info
->control
.hw_key
->cipher
!= WLAN_CIPHER_SUITE_WEP104
)
196 mh_len
+= info
->control
.hw_key
->iv_len
;
198 offload_assist
|= mh_len
<< TX_CMD_OFFLD_MH_SIZE
;
202 return offload_assist
;
206 * Sets most of the Tx cmd's fields
208 void iwl_mvm_set_tx_cmd(struct iwl_mvm
*mvm
, struct sk_buff
*skb
,
209 struct iwl_tx_cmd
*tx_cmd
,
210 struct ieee80211_tx_info
*info
, u8 sta_id
)
212 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
213 __le16 fc
= hdr
->frame_control
;
214 u32 tx_flags
= le32_to_cpu(tx_cmd
->tx_flags
);
215 u32 len
= skb
->len
+ FCS_LEN
;
216 u16 offload_assist
= 0;
219 if (!(info
->flags
& IEEE80211_TX_CTL_NO_ACK
))
220 tx_flags
|= TX_CMD_FLG_ACK
;
222 tx_flags
&= ~TX_CMD_FLG_ACK
;
224 if (ieee80211_is_probe_resp(fc
))
225 tx_flags
|= TX_CMD_FLG_TSF
;
227 if (ieee80211_has_morefrags(fc
))
228 tx_flags
|= TX_CMD_FLG_MORE_FRAG
;
230 if (ieee80211_is_data_qos(fc
)) {
231 u8
*qc
= ieee80211_get_qos_ctl(hdr
);
232 tx_cmd
->tid_tspec
= qc
[0] & 0xf;
233 tx_flags
&= ~TX_CMD_FLG_SEQ_CTL
;
234 if (*qc
& IEEE80211_QOS_CTL_A_MSDU_PRESENT
)
235 offload_assist
|= BIT(TX_CMD_OFFLD_AMSDU
);
236 } else if (ieee80211_is_back_req(fc
)) {
237 struct ieee80211_bar
*bar
= (void *)skb
->data
;
238 u16 control
= le16_to_cpu(bar
->control
);
239 u16 ssn
= le16_to_cpu(bar
->start_seq_num
);
241 tx_flags
|= TX_CMD_FLG_ACK
| TX_CMD_FLG_BAR
;
242 tx_cmd
->tid_tspec
= (control
&
243 IEEE80211_BAR_CTRL_TID_INFO_MASK
) >>
244 IEEE80211_BAR_CTRL_TID_INFO_SHIFT
;
245 WARN_ON_ONCE(tx_cmd
->tid_tspec
>= IWL_MAX_TID_COUNT
);
246 iwl_mvm_bar_check_trigger(mvm
, bar
->ra
, tx_cmd
->tid_tspec
,
249 tx_cmd
->tid_tspec
= IWL_TID_NON_QOS
;
250 if (info
->flags
& IEEE80211_TX_CTL_ASSIGN_SEQ
)
251 tx_flags
|= TX_CMD_FLG_SEQ_CTL
;
253 tx_flags
&= ~TX_CMD_FLG_SEQ_CTL
;
256 /* Default to 0 (BE) when tid_spec is set to IWL_TID_NON_QOS */
257 if (tx_cmd
->tid_tspec
< IWL_MAX_TID_COUNT
)
258 ac
= tid_to_mac80211_ac
[tx_cmd
->tid_tspec
];
260 ac
= tid_to_mac80211_ac
[0];
262 tx_flags
|= iwl_mvm_bt_coex_tx_prio(mvm
, hdr
, info
, ac
) <<
263 TX_CMD_FLG_BT_PRIO_POS
;
265 if (ieee80211_is_mgmt(fc
)) {
266 if (ieee80211_is_assoc_req(fc
) || ieee80211_is_reassoc_req(fc
))
267 tx_cmd
->pm_frame_timeout
= cpu_to_le16(PM_FRAME_ASSOC
);
268 else if (ieee80211_is_action(fc
))
269 tx_cmd
->pm_frame_timeout
= cpu_to_le16(PM_FRAME_NONE
);
271 tx_cmd
->pm_frame_timeout
= cpu_to_le16(PM_FRAME_MGMT
);
273 /* The spec allows Action frames in A-MPDU, we don't support
276 WARN_ON_ONCE(info
->flags
& IEEE80211_TX_CTL_AMPDU
);
277 } else if (info
->control
.flags
& IEEE80211_TX_CTRL_PORT_CTRL_PROTO
) {
278 tx_cmd
->pm_frame_timeout
= cpu_to_le16(PM_FRAME_MGMT
);
280 tx_cmd
->pm_frame_timeout
= cpu_to_le16(PM_FRAME_NONE
);
283 if (ieee80211_is_data(fc
) && len
> mvm
->rts_threshold
&&
284 !is_multicast_ether_addr(ieee80211_get_DA(hdr
)))
285 tx_flags
|= TX_CMD_FLG_PROT_REQUIRE
;
287 if (fw_has_capa(&mvm
->fw
->ucode_capa
,
288 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT
) &&
289 ieee80211_action_contains_tpc(skb
))
290 tx_flags
|= TX_CMD_FLG_WRITE_TX_POWER
;
292 tx_cmd
->tx_flags
= cpu_to_le32(tx_flags
);
293 /* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */
294 tx_cmd
->len
= cpu_to_le16((u16
)skb
->len
);
295 tx_cmd
->life_time
= cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE
);
296 tx_cmd
->sta_id
= sta_id
;
298 /* padding is inserted later in transport */
299 if (ieee80211_hdrlen(fc
) % 4 &&
300 !(offload_assist
& BIT(TX_CMD_OFFLD_AMSDU
)))
301 offload_assist
|= BIT(TX_CMD_OFFLD_PAD
);
303 tx_cmd
->offload_assist
|=
304 cpu_to_le16(iwl_mvm_tx_csum(mvm
, skb
, hdr
, info
,
308 static u32
iwl_mvm_get_tx_rate(struct iwl_mvm
*mvm
,
309 struct ieee80211_tx_info
*info
,
310 struct ieee80211_sta
*sta
)
316 /* HT rate doesn't make sense for a non data frame */
317 WARN_ONCE(info
->control
.rates
[0].flags
& IEEE80211_TX_RC_MCS
,
318 "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame\n",
319 info
->control
.rates
[0].flags
,
320 info
->control
.rates
[0].idx
);
322 rate_idx
= info
->control
.rates
[0].idx
;
323 /* if the rate isn't a well known legacy rate, take the lowest one */
324 if (rate_idx
< 0 || rate_idx
>= IWL_RATE_COUNT_LEGACY
)
325 rate_idx
= rate_lowest_index(
326 &mvm
->nvm_data
->bands
[info
->band
], sta
);
328 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
329 if (info
->band
== NL80211_BAND_5GHZ
)
330 rate_idx
+= IWL_FIRST_OFDM_RATE
;
332 /* For 2.4 GHZ band, check that there is no need to remap */
333 BUILD_BUG_ON(IWL_FIRST_CCK_RATE
!= 0);
335 /* Get PLCP rate for tx_cmd->rate_n_flags */
336 rate_plcp
= iwl_mvm_mac80211_idx_to_hwrate(rate_idx
);
338 if (info
->band
== NL80211_BAND_2GHZ
&&
339 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm
))
340 rate_flags
= mvm
->cfg
->non_shared_ant
<< RATE_MCS_ANT_POS
;
343 BIT(mvm
->mgmt_last_antenna_idx
) << RATE_MCS_ANT_POS
;
345 /* Set CCK flag as needed */
346 if ((rate_idx
>= IWL_FIRST_CCK_RATE
) && (rate_idx
<= IWL_LAST_CCK_RATE
))
347 rate_flags
|= RATE_MCS_CCK_MSK
;
349 return (u32
)rate_plcp
| rate_flags
;
353 * Sets the fields in the Tx cmd that are rate related
355 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm
*mvm
, struct iwl_tx_cmd
*tx_cmd
,
356 struct ieee80211_tx_info
*info
,
357 struct ieee80211_sta
*sta
, __le16 fc
)
359 /* Set retry limit on RTS packets */
360 tx_cmd
->rts_retry_limit
= IWL_RTS_DFAULT_RETRY_LIMIT
;
362 /* Set retry limit on DATA packets and Probe Responses*/
363 if (ieee80211_is_probe_resp(fc
)) {
364 tx_cmd
->data_retry_limit
= IWL_MGMT_DFAULT_RETRY_LIMIT
;
365 tx_cmd
->rts_retry_limit
=
366 min(tx_cmd
->data_retry_limit
, tx_cmd
->rts_retry_limit
);
367 } else if (ieee80211_is_back_req(fc
)) {
368 tx_cmd
->data_retry_limit
= IWL_BAR_DFAULT_RETRY_LIMIT
;
370 tx_cmd
->data_retry_limit
= IWL_DEFAULT_TX_RETRY
;
374 * for data packets, rate info comes from the table inside the fw. This
375 * table is controlled by LINK_QUALITY commands
378 if (ieee80211_is_data(fc
) && sta
) {
379 tx_cmd
->initial_rate_index
= 0;
380 tx_cmd
->tx_flags
|= cpu_to_le32(TX_CMD_FLG_STA_RATE
);
382 } else if (ieee80211_is_back_req(fc
)) {
384 cpu_to_le32(TX_CMD_FLG_ACK
| TX_CMD_FLG_BAR
);
387 mvm
->mgmt_last_antenna_idx
=
388 iwl_mvm_next_antenna(mvm
, iwl_mvm_get_valid_tx_ant(mvm
),
389 mvm
->mgmt_last_antenna_idx
);
391 /* Set the rate in the TX cmd */
392 tx_cmd
->rate_n_flags
= cpu_to_le32(iwl_mvm_get_tx_rate(mvm
, info
, sta
));
395 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info
*info
,
398 struct ieee80211_key_conf
*keyconf
= info
->control
.hw_key
;
401 pn
= atomic64_inc_return(&keyconf
->tx_pn
);
404 crypto_hdr
[3] = 0x20 | (keyconf
->keyidx
<< 6);
405 crypto_hdr
[1] = pn
>> 8;
406 crypto_hdr
[4] = pn
>> 16;
407 crypto_hdr
[5] = pn
>> 24;
408 crypto_hdr
[6] = pn
>> 32;
409 crypto_hdr
[7] = pn
>> 40;
413 * Sets the fields in the Tx cmd that are crypto related
415 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm
*mvm
,
416 struct ieee80211_tx_info
*info
,
417 struct iwl_tx_cmd
*tx_cmd
,
418 struct sk_buff
*skb_frag
,
421 struct ieee80211_key_conf
*keyconf
= info
->control
.hw_key
;
422 u8
*crypto_hdr
= skb_frag
->data
+ hdrlen
;
425 switch (keyconf
->cipher
) {
426 case WLAN_CIPHER_SUITE_CCMP
:
427 case WLAN_CIPHER_SUITE_CCMP_256
:
428 iwl_mvm_set_tx_cmd_ccmp(info
, tx_cmd
);
429 iwl_mvm_set_tx_cmd_pn(info
, crypto_hdr
);
432 case WLAN_CIPHER_SUITE_TKIP
:
433 tx_cmd
->sec_ctl
= TX_CMD_SEC_TKIP
;
434 pn
= atomic64_inc_return(&keyconf
->tx_pn
);
435 ieee80211_tkip_add_iv(crypto_hdr
, keyconf
, pn
);
436 ieee80211_get_tkip_p2k(keyconf
, skb_frag
, tx_cmd
->key
);
439 case WLAN_CIPHER_SUITE_WEP104
:
440 tx_cmd
->sec_ctl
|= TX_CMD_SEC_KEY128
;
442 case WLAN_CIPHER_SUITE_WEP40
:
443 tx_cmd
->sec_ctl
|= TX_CMD_SEC_WEP
|
444 ((keyconf
->keyidx
<< TX_CMD_SEC_WEP_KEY_IDX_POS
) &
445 TX_CMD_SEC_WEP_KEY_IDX_MSK
);
447 memcpy(&tx_cmd
->key
[3], keyconf
->key
, keyconf
->keylen
);
449 case WLAN_CIPHER_SUITE_GCMP
:
450 case WLAN_CIPHER_SUITE_GCMP_256
:
451 /* TODO: Taking the key from the table might introduce a race
452 * when PTK rekeying is done, having an old packets with a PN
453 * based on the old key but the message encrypted with a new
455 * Need to handle this.
457 tx_cmd
->sec_ctl
|= TX_CMD_SEC_GCMP
| TX_CMD_SEC_KEY_FROM_TABLE
;
458 tx_cmd
->key
[0] = keyconf
->hw_key_idx
;
459 iwl_mvm_set_tx_cmd_pn(info
, crypto_hdr
);
462 tx_cmd
->sec_ctl
|= TX_CMD_SEC_EXT
;
467 * Allocates and sets the Tx cmd the driver data pointers in the skb
469 static struct iwl_device_cmd
*
470 iwl_mvm_set_tx_params(struct iwl_mvm
*mvm
, struct sk_buff
*skb
,
471 struct ieee80211_tx_info
*info
, int hdrlen
,
472 struct ieee80211_sta
*sta
, u8 sta_id
)
474 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
475 struct iwl_device_cmd
*dev_cmd
;
476 struct iwl_tx_cmd
*tx_cmd
;
478 dev_cmd
= iwl_trans_alloc_tx_cmd(mvm
->trans
);
480 if (unlikely(!dev_cmd
))
483 /* Make sure we zero enough of dev_cmd */
484 BUILD_BUG_ON(sizeof(struct iwl_tx_cmd_gen2
) > sizeof(*tx_cmd
));
486 memset(dev_cmd
, 0, sizeof(dev_cmd
->hdr
) + sizeof(*tx_cmd
));
487 dev_cmd
->hdr
.cmd
= TX_CMD
;
489 if (iwl_mvm_has_new_tx_api(mvm
)) {
490 struct iwl_tx_cmd_gen2
*cmd
= (void *)dev_cmd
->payload
;
491 u16 offload_assist
= 0;
493 if (ieee80211_is_data_qos(hdr
->frame_control
)) {
494 u8
*qc
= ieee80211_get_qos_ctl(hdr
);
496 if (*qc
& IEEE80211_QOS_CTL_A_MSDU_PRESENT
)
497 offload_assist
|= BIT(TX_CMD_OFFLD_AMSDU
);
500 offload_assist
= iwl_mvm_tx_csum(mvm
, skb
, hdr
, info
,
503 /* padding is inserted later in transport */
504 if (ieee80211_hdrlen(hdr
->frame_control
) % 4 &&
505 !(offload_assist
& BIT(TX_CMD_OFFLD_AMSDU
)))
506 offload_assist
|= BIT(TX_CMD_OFFLD_PAD
);
508 cmd
->offload_assist
|= cpu_to_le16(offload_assist
);
510 /* Total # bytes to be transmitted */
511 cmd
->len
= cpu_to_le16((u16
)skb
->len
);
513 /* Copy MAC header from skb into command buffer */
514 memcpy(cmd
->hdr
, hdr
, hdrlen
);
516 if (!info
->control
.hw_key
)
517 cmd
->flags
|= cpu_to_le32(IWL_TX_FLAGS_ENCRYPT_DIS
);
519 /* For data packets rate info comes from the fw */
520 if (ieee80211_is_data(hdr
->frame_control
) && sta
)
523 cmd
->flags
|= cpu_to_le32(IWL_TX_FLAGS_CMD_RATE
);
525 cpu_to_le32(iwl_mvm_get_tx_rate(mvm
, info
, sta
));
530 tx_cmd
= (struct iwl_tx_cmd
*)dev_cmd
->payload
;
532 if (info
->control
.hw_key
)
533 iwl_mvm_set_tx_cmd_crypto(mvm
, info
, tx_cmd
, skb
, hdrlen
);
535 iwl_mvm_set_tx_cmd(mvm
, skb
, tx_cmd
, info
, sta_id
);
537 iwl_mvm_set_tx_cmd_rate(mvm
, tx_cmd
, info
, sta
, hdr
->frame_control
);
539 /* Copy MAC header from skb into command buffer */
540 memcpy(tx_cmd
->hdr
, hdr
, hdrlen
);
546 static void iwl_mvm_skb_prepare_status(struct sk_buff
*skb
,
547 struct iwl_device_cmd
*cmd
)
549 struct ieee80211_tx_info
*skb_info
= IEEE80211_SKB_CB(skb
);
551 memset(&skb_info
->status
, 0, sizeof(skb_info
->status
));
552 memset(skb_info
->driver_data
, 0, sizeof(skb_info
->driver_data
));
554 skb_info
->driver_data
[1] = cmd
;
557 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm
*mvm
,
558 struct ieee80211_tx_info
*info
, __le16 fc
)
560 struct iwl_mvm_vif
*mvmvif
;
562 if (!iwl_mvm_is_dqa_supported(mvm
))
563 return info
->hw_queue
;
565 mvmvif
= iwl_mvm_vif_from_mac80211(info
->control
.vif
);
567 switch (info
->control
.vif
->type
) {
568 case NL80211_IFTYPE_AP
:
569 case NL80211_IFTYPE_ADHOC
:
571 * Handle legacy hostapd as well, where station will be added
572 * only just before sending the association response.
573 * Also take care of the case where we send a deauth to a
574 * station that we don't have, or similarly an association
575 * response (with non-success status) for a station we can't
577 * Also, disassociate frames might happen, particular with
578 * reason 7 ("Class 3 frame received from nonassociated STA").
580 if (ieee80211_is_probe_resp(fc
) || ieee80211_is_auth(fc
) ||
581 ieee80211_is_deauth(fc
) || ieee80211_is_assoc_resp(fc
) ||
582 ieee80211_is_disassoc(fc
))
583 return mvm
->probe_queue
;
584 if (info
->hw_queue
== info
->control
.vif
->cab_queue
)
585 return mvmvif
->cab_queue
;
587 WARN_ONCE(info
->control
.vif
->type
!= NL80211_IFTYPE_ADHOC
,
588 "fc=0x%02x", le16_to_cpu(fc
));
589 return mvm
->probe_queue
;
590 case NL80211_IFTYPE_P2P_DEVICE
:
591 if (ieee80211_is_mgmt(fc
))
592 return mvm
->p2p_dev_queue
;
593 if (info
->hw_queue
== info
->control
.vif
->cab_queue
)
594 return mvmvif
->cab_queue
;
597 return mvm
->p2p_dev_queue
;
599 WARN_ONCE(1, "Not a ctrl vif, no available queue\n");
604 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm
*mvm
, struct sk_buff
*skb
)
606 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
607 struct ieee80211_tx_info
*skb_info
= IEEE80211_SKB_CB(skb
);
608 struct ieee80211_tx_info info
;
609 struct iwl_device_cmd
*dev_cmd
;
611 int hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
614 /* IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used
615 * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel
616 * queue. STATION (HS2.0) uses the auxiliary context of the FW,
617 * and hence needs to be sent on the aux queue
619 if (skb_info
->hw_queue
== IWL_MVM_OFFCHANNEL_QUEUE
&&
620 skb_info
->control
.vif
->type
== NL80211_IFTYPE_STATION
)
621 skb_info
->hw_queue
= mvm
->aux_queue
;
623 memcpy(&info
, skb
->cb
, sizeof(info
));
625 if (WARN_ON_ONCE(info
.flags
& IEEE80211_TX_CTL_AMPDU
))
628 if (WARN_ON_ONCE(info
.flags
& IEEE80211_TX_CTL_SEND_AFTER_DTIM
&&
629 (!info
.control
.vif
||
630 info
.hw_queue
!= info
.control
.vif
->cab_queue
)))
633 queue
= info
.hw_queue
;
636 * If the interface on which the frame is sent is the P2P_DEVICE
637 * or an AP/GO interface use the broadcast station associated
638 * with it; otherwise if the interface is a managed interface
639 * use the AP station associated with it for multicast traffic
640 * (this is not possible for unicast packets as a TLDS discovery
641 * response are sent without a station entry); otherwise use the
644 sta_id
= mvm
->aux_sta
.sta_id
;
645 if (info
.control
.vif
) {
646 struct iwl_mvm_vif
*mvmvif
=
647 iwl_mvm_vif_from_mac80211(info
.control
.vif
);
649 if (info
.control
.vif
->type
== NL80211_IFTYPE_P2P_DEVICE
||
650 info
.control
.vif
->type
== NL80211_IFTYPE_AP
||
651 info
.control
.vif
->type
== NL80211_IFTYPE_ADHOC
) {
652 sta_id
= mvmvif
->bcast_sta
.sta_id
;
653 queue
= iwl_mvm_get_ctrl_vif_queue(mvm
, &info
,
657 } else if (info
.control
.vif
->type
== NL80211_IFTYPE_STATION
&&
658 is_multicast_ether_addr(hdr
->addr1
)) {
659 u8 ap_sta_id
= ACCESS_ONCE(mvmvif
->ap_sta_id
);
661 if (ap_sta_id
!= IWL_MVM_INVALID_STA
)
663 } else if (iwl_mvm_is_dqa_supported(mvm
) &&
664 info
.control
.vif
->type
== NL80211_IFTYPE_MONITOR
) {
665 queue
= mvm
->aux_queue
;
669 IWL_DEBUG_TX(mvm
, "station Id %d, queue=%d\n", sta_id
, queue
);
671 dev_cmd
= iwl_mvm_set_tx_params(mvm
, skb
, &info
, hdrlen
, NULL
, sta_id
);
675 /* From now on, we cannot access info->control */
676 iwl_mvm_skb_prepare_status(skb
, dev_cmd
);
678 if (iwl_trans_tx(mvm
->trans
, skb
, dev_cmd
, queue
)) {
679 iwl_trans_free_tx_cmd(mvm
->trans
, dev_cmd
);
684 * Increase the pending frames counter, so that later when a reply comes
685 * in and the counter is decreased - we don't start getting negative
687 * Note that we don't need to make sure it isn't agg'd, since we're
689 * For DQA mode - we shouldn't increase it though
691 if (!iwl_mvm_is_dqa_supported(mvm
))
692 atomic_inc(&mvm
->pending_frames
[sta_id
]);
698 static int iwl_mvm_tx_tso(struct iwl_mvm
*mvm
, struct sk_buff
*skb
,
699 struct ieee80211_tx_info
*info
,
700 struct ieee80211_sta
*sta
,
701 struct sk_buff_head
*mpdus_skb
)
703 struct iwl_mvm_sta
*mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
704 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
705 unsigned int mss
= skb_shinfo(skb
)->gso_size
;
706 struct sk_buff
*tmp
, *next
;
707 char cb
[sizeof(skb
->cb
)];
708 unsigned int num_subframes
, tcp_payload_len
, subf_len
, max_amsdu_len
;
709 bool ipv4
= (skb
->protocol
== htons(ETH_P_IP
));
710 u16 ip_base_id
= ipv4
? ntohs(ip_hdr(skb
)->id
) : 0;
711 u16 snap_ip_tcp
, pad
, i
= 0;
712 unsigned int dbg_max_amsdu_len
;
713 netdev_features_t netdev_features
= NETIF_F_CSUM_MASK
| NETIF_F_SG
;
716 snap_ip_tcp
= 8 + skb_transport_header(skb
) - skb_network_header(skb
) +
719 dbg_max_amsdu_len
= ACCESS_ONCE(mvm
->max_amsdu_len
);
721 if (!sta
->max_amsdu_len
||
722 !ieee80211_is_data_qos(hdr
->frame_control
) ||
723 (!mvmsta
->tlc_amsdu
&& !dbg_max_amsdu_len
)) {
729 qc
= ieee80211_get_qos_ctl(hdr
);
730 tid
= *qc
& IEEE80211_QOS_CTL_TID_MASK
;
731 if (WARN_ON_ONCE(tid
>= IWL_MAX_TID_COUNT
))
735 * Do not build AMSDU for IPv6 with extension headers.
736 * ask stack to segment and checkum the generated MPDUs for us.
738 if (skb
->protocol
== htons(ETH_P_IPV6
) &&
739 ((struct ipv6hdr
*)skb_network_header(skb
))->nexthdr
!=
743 netdev_features
&= ~NETIF_F_CSUM_MASK
;
748 * No need to lock amsdu_in_ampdu_allowed since it can't be modified
749 * during an BA session.
751 if (info
->flags
& IEEE80211_TX_CTL_AMPDU
&&
752 !mvmsta
->tid_data
[tid
].amsdu_in_ampdu_allowed
) {
758 max_amsdu_len
= sta
->max_amsdu_len
;
760 /* the Tx FIFO to which this A-MSDU will be routed */
761 txf
= iwl_mvm_ac_to_tx_fifo
[tid_to_mac80211_ac
[tid
]];
764 * Don't send an AMSDU that will be longer than the TXF.
765 * Add a security margin of 256 for the TX command + headers.
766 * We also want to have the start of the next packet inside the
767 * fifo to be able to send bursts.
769 max_amsdu_len
= min_t(unsigned int, max_amsdu_len
,
770 mvm
->smem_cfg
.lmac
[0].txfifo_size
[txf
] - 256);
772 if (unlikely(dbg_max_amsdu_len
))
773 max_amsdu_len
= min_t(unsigned int, max_amsdu_len
,
777 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not
778 * supported. This is a spec requirement (IEEE 802.11-2015
779 * section 8.7.3 NOTE 3).
781 if (info
->flags
& IEEE80211_TX_CTL_AMPDU
&&
782 !sta
->vht_cap
.vht_supported
)
783 max_amsdu_len
= min_t(unsigned int, max_amsdu_len
, 4095);
785 /* Sub frame header + SNAP + IP header + TCP header + MSS */
786 subf_len
= sizeof(struct ethhdr
) + snap_ip_tcp
+ mss
;
787 pad
= (4 - subf_len
) & 0x3;
790 * If we have N subframes in the A-MSDU, then the A-MSDU's size is
791 * N * subf_len + (N - 1) * pad.
793 num_subframes
= (max_amsdu_len
+ pad
) / (subf_len
+ pad
);
794 if (num_subframes
> 1)
795 *qc
|= IEEE80211_QOS_CTL_A_MSDU_PRESENT
;
797 tcp_payload_len
= skb_tail_pointer(skb
) - skb_transport_header(skb
) -
798 tcp_hdrlen(skb
) + skb
->data_len
;
801 * Make sure we have enough TBs for the A-MSDU:
802 * 2 for each subframe
803 * 1 more for each fragment
804 * 1 more for the potential data in the header
807 min_t(unsigned int, num_subframes
,
808 (mvm
->trans
->max_skb_frags
- 1 -
809 skb_shinfo(skb
)->nr_frags
) / 2);
811 /* This skb fits in one single A-MSDU */
812 if (num_subframes
* mss
>= tcp_payload_len
) {
813 __skb_queue_tail(mpdus_skb
, skb
);
818 * Trick the segmentation function to make it
819 * create SKBs that can fit into one A-MSDU.
822 skb_shinfo(skb
)->gso_size
= num_subframes
* mss
;
823 memcpy(cb
, skb
->cb
, sizeof(cb
));
825 next
= skb_gso_segment(skb
, netdev_features
);
826 skb_shinfo(skb
)->gso_size
= mss
;
827 if (WARN_ON_ONCE(IS_ERR(next
)))
836 memcpy(tmp
->cb
, cb
, sizeof(tmp
->cb
));
838 * Compute the length of all the data added for the A-MSDU.
839 * This will be used to compute the length to write in the TX
840 * command. We have: SNAP + IP + TCP for n -1 subframes and
841 * ETH header for n subframes.
843 tcp_payload_len
= skb_tail_pointer(tmp
) -
844 skb_transport_header(tmp
) -
845 tcp_hdrlen(tmp
) + tmp
->data_len
;
848 ip_hdr(tmp
)->id
= htons(ip_base_id
+ i
* num_subframes
);
850 if (tcp_payload_len
> mss
) {
851 skb_shinfo(tmp
)->gso_size
= mss
;
853 if (ieee80211_is_data_qos(hdr
->frame_control
)) {
854 qc
= ieee80211_get_qos_ctl((void *)tmp
->data
);
857 ip_send_check(ip_hdr(tmp
));
858 *qc
&= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT
;
860 skb_shinfo(tmp
)->gso_size
= 0;
866 __skb_queue_tail(mpdus_skb
, tmp
);
872 #else /* CONFIG_INET */
873 static int iwl_mvm_tx_tso(struct iwl_mvm
*mvm
, struct sk_buff
*skb
,
874 struct ieee80211_tx_info
*info
,
875 struct ieee80211_sta
*sta
,
876 struct sk_buff_head
*mpdus_skb
)
878 /* Impossible to get TSO with CONFIG_INET */
885 static void iwl_mvm_tx_add_stream(struct iwl_mvm
*mvm
,
886 struct iwl_mvm_sta
*mvm_sta
, u8 tid
,
889 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
890 u8 mac_queue
= info
->hw_queue
;
891 struct sk_buff_head
*deferred_tx_frames
;
893 lockdep_assert_held(&mvm_sta
->lock
);
895 mvm_sta
->deferred_traffic_tid_map
|= BIT(tid
);
896 set_bit(mvm_sta
->sta_id
, mvm
->sta_deferred_frames
);
898 deferred_tx_frames
= &mvm_sta
->tid_data
[tid
].deferred_tx_frames
;
900 skb_queue_tail(deferred_tx_frames
, skb
);
903 * The first deferred frame should've stopped the MAC queues, so we
904 * should never get a second deferred frame for the RA/TID.
906 if (!WARN(skb_queue_len(deferred_tx_frames
) != 1,
907 "RATID %d/%d has %d deferred frames\n", mvm_sta
->sta_id
, tid
,
908 skb_queue_len(deferred_tx_frames
))) {
909 iwl_mvm_stop_mac_queues(mvm
, BIT(mac_queue
));
910 schedule_work(&mvm
->add_stream_wk
);
914 /* Check if there are any timed-out TIDs on a given shared TXQ */
915 static bool iwl_mvm_txq_should_update(struct iwl_mvm
*mvm
, int txq_id
)
917 unsigned long queue_tid_bitmap
= mvm
->queue_info
[txq_id
].tid_bitmap
;
918 unsigned long now
= jiffies
;
921 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm
)))
924 for_each_set_bit(tid
, &queue_tid_bitmap
, IWL_MAX_TID_COUNT
+ 1) {
925 if (time_before(mvm
->queue_info
[txq_id
].last_frame_time
[tid
] +
926 IWL_MVM_DQA_QUEUE_TIMEOUT
, now
))
934 * Sets the fields in the Tx cmd that are crypto related
936 static int iwl_mvm_tx_mpdu(struct iwl_mvm
*mvm
, struct sk_buff
*skb
,
937 struct ieee80211_tx_info
*info
,
938 struct ieee80211_sta
*sta
)
940 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
941 struct iwl_mvm_sta
*mvmsta
;
942 struct iwl_device_cmd
*dev_cmd
;
945 u8 tid
= IWL_MAX_TID_COUNT
;
946 u16 txq_id
= info
->hw_queue
;
947 bool is_ampdu
= false;
950 mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
951 fc
= hdr
->frame_control
;
952 hdrlen
= ieee80211_hdrlen(fc
);
954 if (WARN_ON_ONCE(!mvmsta
))
957 if (WARN_ON_ONCE(mvmsta
->sta_id
== IWL_MVM_INVALID_STA
))
960 dev_cmd
= iwl_mvm_set_tx_params(mvm
, skb
, info
, hdrlen
,
961 sta
, mvmsta
->sta_id
);
966 * we handle that entirely ourselves -- for uAPSD the firmware
967 * will always send a notification, and for PS-Poll responses
968 * we'll notify mac80211 when getting frame status
970 info
->flags
&= ~IEEE80211_TX_STATUS_EOSP
;
972 spin_lock(&mvmsta
->lock
);
974 /* nullfunc frames should go to the MGMT queue regardless of QOS,
975 * the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default
976 * assignment of MGMT TID
978 if (ieee80211_is_data_qos(fc
) && !ieee80211_is_qos_nullfunc(fc
)) {
980 qc
= ieee80211_get_qos_ctl(hdr
);
981 tid
= qc
[0] & IEEE80211_QOS_CTL_TID_MASK
;
982 if (WARN_ON_ONCE(tid
>= IWL_MAX_TID_COUNT
))
983 goto drop_unlock_sta
;
985 is_ampdu
= info
->flags
& IEEE80211_TX_CTL_AMPDU
;
986 if (WARN_ON_ONCE(is_ampdu
&&
987 mvmsta
->tid_data
[tid
].state
!= IWL_AGG_ON
))
988 goto drop_unlock_sta
;
990 seq_number
= mvmsta
->tid_data
[tid
].seq_number
;
991 seq_number
&= IEEE80211_SCTL_SEQ
;
993 if (!iwl_mvm_has_new_tx_api(mvm
)) {
994 struct iwl_tx_cmd
*tx_cmd
= (void *)dev_cmd
->payload
;
996 hdr
->seq_ctrl
&= cpu_to_le16(IEEE80211_SCTL_FRAG
);
997 hdr
->seq_ctrl
|= cpu_to_le16(seq_number
);
998 /* update the tx_cmd hdr as it was already copied */
999 tx_cmd
->hdr
->seq_ctrl
= hdr
->seq_ctrl
;
1003 if (iwl_mvm_is_dqa_supported(mvm
) || is_ampdu
)
1004 txq_id
= mvmsta
->tid_data
[tid
].txq_id
;
1006 if (sta
->tdls
&& !iwl_mvm_is_dqa_supported(mvm
)) {
1007 /* default to TID 0 for non-QoS packets */
1008 u8 tdls_tid
= tid
== IWL_MAX_TID_COUNT
? 0 : tid
;
1010 txq_id
= mvmsta
->hw_queue
[tid_to_mac80211_ac
[tdls_tid
]];
1013 WARN_ON_ONCE(info
->flags
& IEEE80211_TX_CTL_SEND_AFTER_DTIM
);
1015 /* Check if TXQ needs to be allocated or re-activated */
1016 if (unlikely(txq_id
== IWL_MVM_INVALID_QUEUE
||
1017 !mvmsta
->tid_data
[tid
].is_tid_active
) &&
1018 iwl_mvm_is_dqa_supported(mvm
)) {
1019 /* If TXQ needs to be allocated... */
1020 if (txq_id
== IWL_MVM_INVALID_QUEUE
) {
1021 iwl_mvm_tx_add_stream(mvm
, mvmsta
, tid
, skb
);
1024 * The frame is now deferred, and the worker scheduled
1025 * will re-allocate it, so we can free it for now.
1027 iwl_trans_free_tx_cmd(mvm
->trans
, dev_cmd
);
1028 spin_unlock(&mvmsta
->lock
);
1032 /* queue should always be active in new TX path */
1033 WARN_ON(iwl_mvm_has_new_tx_api(mvm
));
1035 /* If we are here - TXQ exists and needs to be re-activated */
1036 spin_lock(&mvm
->queue_info_lock
);
1037 mvm
->queue_info
[txq_id
].status
= IWL_MVM_QUEUE_READY
;
1038 mvmsta
->tid_data
[tid
].is_tid_active
= true;
1039 spin_unlock(&mvm
->queue_info_lock
);
1041 IWL_DEBUG_TX_QUEUES(mvm
, "Re-activating queue %d for TX\n",
1045 if (iwl_mvm_is_dqa_supported(mvm
) && !iwl_mvm_has_new_tx_api(mvm
)) {
1046 /* Keep track of the time of the last frame for this RA/TID */
1047 mvm
->queue_info
[txq_id
].last_frame_time
[tid
] = jiffies
;
1050 * If we have timed-out TIDs - schedule the worker that will
1051 * reconfig the queues and update them
1053 * Note that the mvm->queue_info_lock isn't being taken here in
1054 * order to not serialize the TX flow. This isn't dangerous
1055 * because scheduling mvm->add_stream_wk can't ruin the state,
1056 * and if we DON'T schedule it due to some race condition then
1057 * next TX we get here we will.
1059 if (unlikely(mvm
->queue_info
[txq_id
].status
==
1060 IWL_MVM_QUEUE_SHARED
&&
1061 iwl_mvm_txq_should_update(mvm
, txq_id
)))
1062 schedule_work(&mvm
->add_stream_wk
);
1065 IWL_DEBUG_TX(mvm
, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta
->sta_id
,
1066 tid
, txq_id
, IEEE80211_SEQ_TO_SN(seq_number
));
1068 /* From now on, we cannot access info->control */
1069 iwl_mvm_skb_prepare_status(skb
, dev_cmd
);
1071 if (iwl_trans_tx(mvm
->trans
, skb
, dev_cmd
, txq_id
))
1072 goto drop_unlock_sta
;
1074 if (tid
< IWL_MAX_TID_COUNT
&& !ieee80211_has_morefrags(fc
))
1075 mvmsta
->tid_data
[tid
].seq_number
= seq_number
+ 0x10;
1077 spin_unlock(&mvmsta
->lock
);
1079 /* Increase pending frames count if this isn't AMPDU or DQA queue */
1080 if (!iwl_mvm_is_dqa_supported(mvm
) && !is_ampdu
)
1081 atomic_inc(&mvm
->pending_frames
[mvmsta
->sta_id
]);
1086 iwl_trans_free_tx_cmd(mvm
->trans
, dev_cmd
);
1087 spin_unlock(&mvmsta
->lock
);
1092 int iwl_mvm_tx_skb(struct iwl_mvm
*mvm
, struct sk_buff
*skb
,
1093 struct ieee80211_sta
*sta
)
1095 struct iwl_mvm_sta
*mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
1096 struct ieee80211_tx_info info
;
1097 struct sk_buff_head mpdus_skbs
;
1098 unsigned int payload_len
;
1101 if (WARN_ON_ONCE(!mvmsta
))
1104 if (WARN_ON_ONCE(mvmsta
->sta_id
== IWL_MVM_INVALID_STA
))
1107 memcpy(&info
, skb
->cb
, sizeof(info
));
1109 if (!skb_is_gso(skb
))
1110 return iwl_mvm_tx_mpdu(mvm
, skb
, &info
, sta
);
1112 payload_len
= skb_tail_pointer(skb
) - skb_transport_header(skb
) -
1113 tcp_hdrlen(skb
) + skb
->data_len
;
1115 if (payload_len
<= skb_shinfo(skb
)->gso_size
)
1116 return iwl_mvm_tx_mpdu(mvm
, skb
, &info
, sta
);
1118 __skb_queue_head_init(&mpdus_skbs
);
1120 ret
= iwl_mvm_tx_tso(mvm
, skb
, &info
, sta
, &mpdus_skbs
);
1124 if (WARN_ON(skb_queue_empty(&mpdus_skbs
)))
1127 while (!skb_queue_empty(&mpdus_skbs
)) {
1128 skb
= __skb_dequeue(&mpdus_skbs
);
1130 ret
= iwl_mvm_tx_mpdu(mvm
, skb
, &info
, sta
);
1132 __skb_queue_purge(&mpdus_skbs
);
1140 static void iwl_mvm_check_ratid_empty(struct iwl_mvm
*mvm
,
1141 struct ieee80211_sta
*sta
, u8 tid
)
1143 struct iwl_mvm_sta
*mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
1144 struct iwl_mvm_tid_data
*tid_data
= &mvmsta
->tid_data
[tid
];
1145 struct ieee80211_vif
*vif
= mvmsta
->vif
;
1148 lockdep_assert_held(&mvmsta
->lock
);
1150 if ((tid_data
->state
== IWL_AGG_ON
||
1151 tid_data
->state
== IWL_EMPTYING_HW_QUEUE_DELBA
||
1152 iwl_mvm_is_dqa_supported(mvm
)) &&
1153 iwl_mvm_tid_queued(mvm
, tid_data
) == 0) {
1155 * Now that this aggregation or DQA queue is empty tell
1156 * mac80211 so it knows we no longer have frames buffered for
1157 * the station on this TID (for the TIM bitmap calculation.)
1159 ieee80211_sta_set_buffered(sta
, tid
, false);
1163 * In A000 HW, the next_reclaimed index is only 8 bit, so we'll need
1164 * to align the wrap around of ssn so we compare relevant values.
1166 normalized_ssn
= tid_data
->ssn
;
1167 if (mvm
->trans
->cfg
->gen2
)
1168 normalized_ssn
&= 0xff;
1170 if (normalized_ssn
!= tid_data
->next_reclaimed
)
1173 switch (tid_data
->state
) {
1174 case IWL_EMPTYING_HW_QUEUE_ADDBA
:
1175 IWL_DEBUG_TX_QUEUES(mvm
,
1176 "Can continue addBA flow ssn = next_recl = %d\n",
1177 tid_data
->next_reclaimed
);
1178 tid_data
->state
= IWL_AGG_STARTING
;
1179 ieee80211_start_tx_ba_cb_irqsafe(vif
, sta
->addr
, tid
);
1182 case IWL_EMPTYING_HW_QUEUE_DELBA
:
1183 IWL_DEBUG_TX_QUEUES(mvm
,
1184 "Can continue DELBA flow ssn = next_recl = %d\n",
1185 tid_data
->next_reclaimed
);
1186 if (!iwl_mvm_is_dqa_supported(mvm
)) {
1187 u8 mac80211_ac
= tid_to_mac80211_ac
[tid
];
1189 iwl_mvm_disable_txq(mvm
, tid_data
->txq_id
,
1190 vif
->hw_queue
[mac80211_ac
], tid
,
1193 tid_data
->state
= IWL_AGG_OFF
;
1194 ieee80211_stop_tx_ba_cb_irqsafe(vif
, sta
->addr
, tid
);
1202 #ifdef CONFIG_IWLWIFI_DEBUG
1203 const char *iwl_mvm_get_tx_fail_reason(u32 status
)
1205 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
1206 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
1208 switch (status
& TX_STATUS_MSK
) {
1209 case TX_STATUS_SUCCESS
:
1211 TX_STATUS_POSTPONE(DELAY
);
1212 TX_STATUS_POSTPONE(FEW_BYTES
);
1213 TX_STATUS_POSTPONE(BT_PRIO
);
1214 TX_STATUS_POSTPONE(QUIET_PERIOD
);
1215 TX_STATUS_POSTPONE(CALC_TTAK
);
1216 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY
);
1217 TX_STATUS_FAIL(SHORT_LIMIT
);
1218 TX_STATUS_FAIL(LONG_LIMIT
);
1219 TX_STATUS_FAIL(UNDERRUN
);
1220 TX_STATUS_FAIL(DRAIN_FLOW
);
1221 TX_STATUS_FAIL(RFKILL_FLUSH
);
1222 TX_STATUS_FAIL(LIFE_EXPIRE
);
1223 TX_STATUS_FAIL(DEST_PS
);
1224 TX_STATUS_FAIL(HOST_ABORTED
);
1225 TX_STATUS_FAIL(BT_RETRY
);
1226 TX_STATUS_FAIL(STA_INVALID
);
1227 TX_STATUS_FAIL(FRAG_DROPPED
);
1228 TX_STATUS_FAIL(TID_DISABLE
);
1229 TX_STATUS_FAIL(FIFO_FLUSHED
);
1230 TX_STATUS_FAIL(SMALL_CF_POLL
);
1231 TX_STATUS_FAIL(FW_DROP
);
1232 TX_STATUS_FAIL(STA_COLOR_MISMATCH
);
1237 #undef TX_STATUS_FAIL
1238 #undef TX_STATUS_POSTPONE
1240 #endif /* CONFIG_IWLWIFI_DEBUG */
1242 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags
,
1243 enum nl80211_band band
,
1244 struct ieee80211_tx_rate
*r
)
1246 if (rate_n_flags
& RATE_HT_MCS_GF_MSK
)
1247 r
->flags
|= IEEE80211_TX_RC_GREEN_FIELD
;
1248 switch (rate_n_flags
& RATE_MCS_CHAN_WIDTH_MSK
) {
1249 case RATE_MCS_CHAN_WIDTH_20
:
1251 case RATE_MCS_CHAN_WIDTH_40
:
1252 r
->flags
|= IEEE80211_TX_RC_40_MHZ_WIDTH
;
1254 case RATE_MCS_CHAN_WIDTH_80
:
1255 r
->flags
|= IEEE80211_TX_RC_80_MHZ_WIDTH
;
1257 case RATE_MCS_CHAN_WIDTH_160
:
1258 r
->flags
|= IEEE80211_TX_RC_160_MHZ_WIDTH
;
1261 if (rate_n_flags
& RATE_MCS_SGI_MSK
)
1262 r
->flags
|= IEEE80211_TX_RC_SHORT_GI
;
1263 if (rate_n_flags
& RATE_MCS_HT_MSK
) {
1264 r
->flags
|= IEEE80211_TX_RC_MCS
;
1265 r
->idx
= rate_n_flags
& RATE_HT_MCS_INDEX_MSK
;
1266 } else if (rate_n_flags
& RATE_MCS_VHT_MSK
) {
1267 ieee80211_rate_set_vht(
1268 r
, rate_n_flags
& RATE_VHT_MCS_RATE_CODE_MSK
,
1269 ((rate_n_flags
& RATE_VHT_MCS_NSS_MSK
) >>
1270 RATE_VHT_MCS_NSS_POS
) + 1);
1271 r
->flags
|= IEEE80211_TX_RC_VHT_MCS
;
1273 r
->idx
= iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags
,
1279 * translate ucode response to mac80211 tx status control values
1281 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags
,
1282 struct ieee80211_tx_info
*info
)
1284 struct ieee80211_tx_rate
*r
= &info
->status
.rates
[0];
1286 info
->status
.antenna
=
1287 ((rate_n_flags
& RATE_MCS_ANT_ABC_MSK
) >> RATE_MCS_ANT_POS
);
1288 iwl_mvm_hwrate_to_tx_rate(rate_n_flags
, info
->band
, r
);
1291 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm
*mvm
,
1294 struct iwl_fw_dbg_trigger_tlv
*trig
;
1295 struct iwl_fw_dbg_trigger_tx_status
*status_trig
;
1298 if (!iwl_fw_dbg_trigger_enabled(mvm
->fw
, FW_DBG_TRIGGER_TX_STATUS
))
1301 trig
= iwl_fw_dbg_get_trigger(mvm
->fw
, FW_DBG_TRIGGER_TX_STATUS
);
1302 status_trig
= (void *)trig
->data
;
1304 if (!iwl_fw_dbg_trigger_check_stop(mvm
, NULL
, trig
))
1307 for (i
= 0; i
< ARRAY_SIZE(status_trig
->statuses
); i
++) {
1308 /* don't collect on status 0 */
1309 if (!status_trig
->statuses
[i
].status
)
1312 if (status_trig
->statuses
[i
].status
!= (status
& TX_STATUS_MSK
))
1315 iwl_mvm_fw_dbg_collect_trig(mvm
, trig
,
1316 "Tx status %d was received",
1317 status
& TX_STATUS_MSK
);
1323 * iwl_mvm_get_scd_ssn - returns the SSN of the SCD
1324 * @tx_resp: the Tx response from the fw (agg or non-agg)
1326 * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since
1327 * it can't know that everything will go well until the end of the AMPDU, it
1328 * can't know in advance the number of MPDUs that will be sent in the current
1329 * batch. This is why it writes the agg Tx response while it fetches the MPDUs.
1330 * Hence, it can't know in advance what the SSN of the SCD will be at the end
1331 * of the batch. This is why the SSN of the SCD is written at the end of the
1332 * whole struct at a variable offset. This function knows how to cope with the
1333 * variable offset and returns the SSN of the SCD.
1335 static inline u32
iwl_mvm_get_scd_ssn(struct iwl_mvm
*mvm
,
1336 struct iwl_mvm_tx_resp
*tx_resp
)
1338 return le32_to_cpup((__le32
*)iwl_mvm_get_agg_status(mvm
, tx_resp
) +
1339 tx_resp
->frame_count
) & 0xfff;
1342 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm
*mvm
,
1343 struct iwl_rx_packet
*pkt
)
1345 struct ieee80211_sta
*sta
;
1346 u16 sequence
= le16_to_cpu(pkt
->hdr
.sequence
);
1347 int txq_id
= SEQ_TO_QUEUE(sequence
);
1348 /* struct iwl_mvm_tx_resp_v3 is almost the same */
1349 struct iwl_mvm_tx_resp
*tx_resp
= (void *)pkt
->data
;
1350 int sta_id
= IWL_MVM_TX_RES_GET_RA(tx_resp
->ra_tid
);
1351 int tid
= IWL_MVM_TX_RES_GET_TID(tx_resp
->ra_tid
);
1352 struct agg_tx_status
*agg_status
=
1353 iwl_mvm_get_agg_status(mvm
, tx_resp
);
1354 u32 status
= le16_to_cpu(agg_status
->status
);
1355 u16 ssn
= iwl_mvm_get_scd_ssn(mvm
, tx_resp
);
1356 struct iwl_mvm_sta
*mvmsta
;
1357 struct sk_buff_head skbs
;
1360 u16 next_reclaimed
, seq_ctl
;
1361 bool is_ndp
= false;
1363 __skb_queue_head_init(&skbs
);
1365 if (iwl_mvm_has_new_tx_api(mvm
))
1366 txq_id
= le16_to_cpu(tx_resp
->tx_queue
);
1368 seq_ctl
= le16_to_cpu(tx_resp
->seq_ctl
);
1370 /* we can free until ssn % q.n_bd not inclusive */
1371 iwl_trans_reclaim(mvm
->trans
, txq_id
, ssn
, &skbs
);
1373 while (!skb_queue_empty(&skbs
)) {
1374 struct sk_buff
*skb
= __skb_dequeue(&skbs
);
1375 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1379 iwl_trans_free_tx_cmd(mvm
->trans
, info
->driver_data
[1]);
1381 memset(&info
->status
, 0, sizeof(info
->status
));
1383 /* inform mac80211 about what happened with the frame */
1384 switch (status
& TX_STATUS_MSK
) {
1385 case TX_STATUS_SUCCESS
:
1386 case TX_STATUS_DIRECT_DONE
:
1387 info
->flags
|= IEEE80211_TX_STAT_ACK
;
1389 case TX_STATUS_FAIL_DEST_PS
:
1390 /* In DQA, the FW should have stopped the queue and not
1391 * return this status
1393 WARN_ON(iwl_mvm_is_dqa_supported(mvm
));
1394 info
->flags
|= IEEE80211_TX_STAT_TX_FILTERED
;
1400 iwl_mvm_tx_status_check_trigger(mvm
, status
);
1402 info
->status
.rates
[0].count
= tx_resp
->failure_frame
+ 1;
1403 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp
->initial_rate
),
1405 info
->status
.status_driver_data
[1] =
1406 (void *)(uintptr_t)le32_to_cpu(tx_resp
->initial_rate
);
1408 /* Single frame failure in an AMPDU queue => send BAR */
1409 if (info
->flags
& IEEE80211_TX_CTL_AMPDU
&&
1410 !(info
->flags
& IEEE80211_TX_STAT_ACK
) &&
1411 !(info
->flags
& IEEE80211_TX_STAT_TX_FILTERED
))
1412 info
->flags
|= IEEE80211_TX_STAT_AMPDU_NO_BACK
;
1413 info
->flags
&= ~IEEE80211_TX_CTL_AMPDU
;
1415 /* W/A FW bug: seq_ctl is wrong when the status isn't success */
1416 if (status
!= TX_STATUS_SUCCESS
) {
1417 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
1418 seq_ctl
= le16_to_cpu(hdr
->seq_ctrl
);
1421 if (unlikely(!seq_ctl
)) {
1422 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
1425 * If it is an NDP, we can't update next_reclaim since
1426 * its sequence control is 0. Note that for that same
1427 * reason, NDPs are never sent to A-MPDU'able queues
1428 * so that we can never have more than one freed frame
1429 * for a single Tx resonse (see WARN_ON below).
1431 if (ieee80211_is_qos_nullfunc(hdr
->frame_control
))
1436 * TODO: this is not accurate if we are freeing more than one
1439 info
->status
.tx_time
=
1440 le16_to_cpu(tx_resp
->wireless_media_time
);
1441 BUILD_BUG_ON(ARRAY_SIZE(info
->status
.status_driver_data
) < 1);
1442 lq_color
= TX_RES_RATE_TABLE_COL_GET(tx_resp
->tlc_info
);
1443 info
->status
.status_driver_data
[0] =
1444 RS_DRV_DATA_PACK(lq_color
, tx_resp
->reduced_tpc
);
1446 ieee80211_tx_status(mvm
->hw
, skb
);
1449 if (iwl_mvm_is_dqa_supported(mvm
) || txq_id
>= mvm
->first_agg_queue
) {
1450 /* If this is an aggregation queue, we use the ssn since:
1451 * ssn = wifi seq_num % 256.
1452 * The seq_ctl is the sequence control of the packet to which
1453 * this Tx response relates. But if there is a hole in the
1454 * bitmap of the BA we received, this Tx response may allow to
1455 * reclaim the hole and all the subsequent packets that were
1456 * already acked. In that case, seq_ctl != ssn, and the next
1457 * packet to be reclaimed will be ssn and not seq_ctl. In that
1458 * case, several packets will be reclaimed even if
1461 * The ssn is the index (% 256) of the latest packet that has
1462 * treated (acked / dropped) + 1.
1464 next_reclaimed
= ssn
;
1466 /* The next packet to be reclaimed is the one after this one */
1467 next_reclaimed
= IEEE80211_SEQ_TO_SN(seq_ctl
+ 0x10);
1470 IWL_DEBUG_TX_REPLY(mvm
,
1471 "TXQ %d status %s (0x%08x)\n",
1472 txq_id
, iwl_mvm_get_tx_fail_reason(status
), status
);
1474 IWL_DEBUG_TX_REPLY(mvm
,
1475 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
1476 le32_to_cpu(tx_resp
->initial_rate
),
1477 tx_resp
->failure_frame
, SEQ_TO_INDEX(sequence
),
1478 ssn
, next_reclaimed
, seq_ctl
);
1482 sta
= rcu_dereference(mvm
->fw_id_to_mac_id
[sta_id
]);
1484 * sta can't be NULL otherwise it'd mean that the sta has been freed in
1485 * the firmware while we still have packets for it in the Tx queues.
1487 if (WARN_ON_ONCE(!sta
))
1491 mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
1493 if (tid
!= IWL_TID_NON_QOS
&& tid
!= IWL_MGMT_TID
) {
1494 struct iwl_mvm_tid_data
*tid_data
=
1495 &mvmsta
->tid_data
[tid
];
1496 bool send_eosp_ndp
= false;
1498 spin_lock_bh(&mvmsta
->lock
);
1501 tid_data
->next_reclaimed
= next_reclaimed
;
1502 IWL_DEBUG_TX_REPLY(mvm
,
1503 "Next reclaimed packet:%d\n",
1506 IWL_DEBUG_TX_REPLY(mvm
,
1507 "NDP - don't update next_reclaimed\n");
1510 iwl_mvm_check_ratid_empty(mvm
, sta
, tid
);
1512 if (mvmsta
->sleep_tx_count
) {
1513 mvmsta
->sleep_tx_count
--;
1514 if (mvmsta
->sleep_tx_count
&&
1515 !iwl_mvm_tid_queued(mvm
, tid_data
)) {
1517 * The number of frames in the queue
1518 * dropped to 0 even if we sent less
1519 * frames than we thought we had on the
1521 * This means we had holes in the BA
1522 * window that we just filled, ask
1523 * mac80211 to send EOSP since the
1524 * firmware won't know how to do that.
1525 * Send NDP and the firmware will send
1526 * EOSP notification that will trigger
1527 * a call to ieee80211_sta_eosp().
1529 send_eosp_ndp
= true;
1533 spin_unlock_bh(&mvmsta
->lock
);
1534 if (send_eosp_ndp
) {
1535 iwl_mvm_sta_modify_sleep_tx_count(mvm
, sta
,
1536 IEEE80211_FRAME_RELEASE_UAPSD
,
1537 1, tid
, false, false);
1538 mvmsta
->sleep_tx_count
= 0;
1539 ieee80211_send_eosp_nullfunc(sta
, tid
);
1543 if (mvmsta
->next_status_eosp
) {
1544 mvmsta
->next_status_eosp
= false;
1545 ieee80211_sta_eosp(sta
);
1552 * If the txq is not an AMPDU queue, there is no chance we freed
1553 * several skbs. Check that out...
1555 if (iwl_mvm_is_dqa_supported(mvm
) || txq_id
>= mvm
->first_agg_queue
)
1558 /* We can't free more than one frame at once on a shared queue */
1559 WARN_ON(skb_freed
> 1);
1561 /* If we have still frames for this STA nothing to do here */
1562 if (!atomic_sub_and_test(skb_freed
, &mvm
->pending_frames
[sta_id
]))
1565 if (mvmsta
&& mvmsta
->vif
->type
== NL80211_IFTYPE_AP
) {
1568 * If there are no pending frames for this STA and
1569 * the tx to this station is not disabled, notify
1570 * mac80211 that this station can now wake up in its
1572 * If mvmsta is not NULL, sta is valid.
1575 spin_lock_bh(&mvmsta
->lock
);
1577 if (!mvmsta
->disable_tx
)
1578 ieee80211_sta_block_awake(mvm
->hw
, sta
, false);
1580 spin_unlock_bh(&mvmsta
->lock
);
1583 if (PTR_ERR(sta
) == -EBUSY
|| PTR_ERR(sta
) == -ENOENT
) {
1585 * We are draining and this was the last packet - pre_rcu_remove
1586 * has been called already. We might be after the
1587 * synchronize_net already.
1588 * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues.
1590 set_bit(sta_id
, mvm
->sta_drained
);
1591 schedule_work(&mvm
->sta_drained_wk
);
1598 #ifdef CONFIG_IWLWIFI_DEBUG
1599 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
1600 static const char *iwl_get_agg_tx_status(u16 status
)
1602 switch (status
& AGG_TX_STATE_STATUS_MSK
) {
1603 AGG_TX_STATE_(TRANSMITTED
);
1604 AGG_TX_STATE_(UNDERRUN
);
1605 AGG_TX_STATE_(BT_PRIO
);
1606 AGG_TX_STATE_(FEW_BYTES
);
1607 AGG_TX_STATE_(ABORT
);
1608 AGG_TX_STATE_(LAST_SENT_TTL
);
1609 AGG_TX_STATE_(LAST_SENT_TRY_CNT
);
1610 AGG_TX_STATE_(LAST_SENT_BT_KILL
);
1611 AGG_TX_STATE_(SCD_QUERY
);
1612 AGG_TX_STATE_(TEST_BAD_CRC32
);
1613 AGG_TX_STATE_(RESPONSE
);
1614 AGG_TX_STATE_(DUMP_TX
);
1615 AGG_TX_STATE_(DELAY_TX
);
1621 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm
*mvm
,
1622 struct iwl_rx_packet
*pkt
)
1624 struct iwl_mvm_tx_resp
*tx_resp
= (void *)pkt
->data
;
1625 struct agg_tx_status
*frame_status
=
1626 iwl_mvm_get_agg_status(mvm
, tx_resp
);
1629 for (i
= 0; i
< tx_resp
->frame_count
; i
++) {
1630 u16 fstatus
= le16_to_cpu(frame_status
[i
].status
);
1632 IWL_DEBUG_TX_REPLY(mvm
,
1633 "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
1634 iwl_get_agg_tx_status(fstatus
),
1635 fstatus
& AGG_TX_STATE_STATUS_MSK
,
1636 (fstatus
& AGG_TX_STATE_TRY_CNT_MSK
) >>
1637 AGG_TX_STATE_TRY_CNT_POS
,
1638 le16_to_cpu(frame_status
[i
].sequence
));
1642 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm
*mvm
,
1643 struct iwl_rx_packet
*pkt
)
1645 #endif /* CONFIG_IWLWIFI_DEBUG */
1647 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm
*mvm
,
1648 struct iwl_rx_packet
*pkt
)
1650 struct iwl_mvm_tx_resp
*tx_resp
= (void *)pkt
->data
;
1651 int sta_id
= IWL_MVM_TX_RES_GET_RA(tx_resp
->ra_tid
);
1652 int tid
= IWL_MVM_TX_RES_GET_TID(tx_resp
->ra_tid
);
1653 u16 sequence
= le16_to_cpu(pkt
->hdr
.sequence
);
1654 struct iwl_mvm_sta
*mvmsta
;
1655 int queue
= SEQ_TO_QUEUE(sequence
);
1657 if (WARN_ON_ONCE(queue
< mvm
->first_agg_queue
&&
1658 (!iwl_mvm_is_dqa_supported(mvm
) ||
1659 (queue
!= IWL_MVM_DQA_BSS_CLIENT_QUEUE
))))
1662 if (WARN_ON_ONCE(tid
== IWL_TID_NON_QOS
))
1665 iwl_mvm_rx_tx_cmd_agg_dbg(mvm
, pkt
);
1669 mvmsta
= iwl_mvm_sta_from_staid_rcu(mvm
, sta_id
);
1671 if (!WARN_ON_ONCE(!mvmsta
)) {
1672 mvmsta
->tid_data
[tid
].rate_n_flags
=
1673 le32_to_cpu(tx_resp
->initial_rate
);
1674 mvmsta
->tid_data
[tid
].tx_time
=
1675 le16_to_cpu(tx_resp
->wireless_media_time
);
1676 mvmsta
->tid_data
[tid
].lq_color
=
1677 (tx_resp
->tlc_info
& TX_RES_RATE_TABLE_COLOR_MSK
) >>
1678 TX_RES_RATE_TABLE_COLOR_POS
;
1684 void iwl_mvm_rx_tx_cmd(struct iwl_mvm
*mvm
, struct iwl_rx_cmd_buffer
*rxb
)
1686 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
1687 struct iwl_mvm_tx_resp
*tx_resp
= (void *)pkt
->data
;
1689 if (tx_resp
->frame_count
== 1)
1690 iwl_mvm_rx_tx_cmd_single(mvm
, pkt
);
1692 iwl_mvm_rx_tx_cmd_agg(mvm
, pkt
);
1695 static void iwl_mvm_tx_reclaim(struct iwl_mvm
*mvm
, int sta_id
, int tid
,
1697 struct ieee80211_tx_info
*ba_info
, u32 rate
)
1699 struct sk_buff_head reclaimed_skbs
;
1700 struct iwl_mvm_tid_data
*tid_data
;
1701 struct ieee80211_sta
*sta
;
1702 struct iwl_mvm_sta
*mvmsta
;
1703 struct sk_buff
*skb
;
1706 if (WARN_ONCE(sta_id
>= IWL_MVM_STATION_COUNT
||
1707 tid
>= IWL_MAX_TID_COUNT
,
1708 "sta_id %d tid %d", sta_id
, tid
))
1713 sta
= rcu_dereference(mvm
->fw_id_to_mac_id
[sta_id
]);
1715 /* Reclaiming frames for a station that has been deleted ? */
1716 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta
))) {
1721 mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
1722 tid_data
= &mvmsta
->tid_data
[tid
];
1724 if (tid_data
->txq_id
!= txq
) {
1726 "invalid BA notification: Q %d, tid %d\n",
1727 tid_data
->txq_id
, tid
);
1732 spin_lock_bh(&mvmsta
->lock
);
1734 __skb_queue_head_init(&reclaimed_skbs
);
1737 * Release all TFDs before the SSN, i.e. all TFDs in front of
1738 * block-ack window (we assume that they've been successfully
1739 * transmitted ... if not, it's too late anyway).
1741 iwl_trans_reclaim(mvm
->trans
, txq
, index
, &reclaimed_skbs
);
1743 tid_data
->next_reclaimed
= index
;
1745 iwl_mvm_check_ratid_empty(mvm
, sta
, tid
);
1749 /* pack lq color from tid_data along the reduced txp */
1750 ba_info
->status
.status_driver_data
[0] =
1751 RS_DRV_DATA_PACK(tid_data
->lq_color
,
1752 ba_info
->status
.status_driver_data
[0]);
1753 ba_info
->status
.status_driver_data
[1] = (void *)(uintptr_t)rate
;
1755 skb_queue_walk(&reclaimed_skbs
, skb
) {
1756 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
1757 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1759 if (ieee80211_is_data_qos(hdr
->frame_control
))
1764 iwl_trans_free_tx_cmd(mvm
->trans
, info
->driver_data
[1]);
1766 memset(&info
->status
, 0, sizeof(info
->status
));
1767 /* Packet was transmitted successfully, failures come as single
1768 * frames because before failing a frame the firmware transmits
1769 * it without aggregation at least once.
1771 info
->flags
|= IEEE80211_TX_STAT_ACK
;
1773 /* this is the first skb we deliver in this batch */
1774 /* put the rate scaling data there */
1776 info
->flags
|= IEEE80211_TX_STAT_AMPDU
;
1777 memcpy(&info
->status
, &ba_info
->status
,
1778 sizeof(ba_info
->status
));
1779 iwl_mvm_hwrate_to_tx_status(rate
, info
);
1783 spin_unlock_bh(&mvmsta
->lock
);
1785 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
1786 * possible (i.e. first MPDU in the aggregation wasn't acked)
1787 * Still it's important to update RS about sent vs. acked.
1789 if (skb_queue_empty(&reclaimed_skbs
)) {
1790 struct ieee80211_chanctx_conf
*chanctx_conf
= NULL
;
1794 rcu_dereference(mvmsta
->vif
->chanctx_conf
);
1796 if (WARN_ON_ONCE(!chanctx_conf
))
1799 ba_info
->band
= chanctx_conf
->def
.chan
->band
;
1800 iwl_mvm_hwrate_to_tx_status(rate
, ba_info
);
1802 IWL_DEBUG_TX_REPLY(mvm
, "No reclaim. Update rs directly\n");
1803 iwl_mvm_rs_tx_status(mvm
, sta
, tid
, ba_info
, false);
1809 while (!skb_queue_empty(&reclaimed_skbs
)) {
1810 skb
= __skb_dequeue(&reclaimed_skbs
);
1811 ieee80211_tx_status(mvm
->hw
, skb
);
1815 void iwl_mvm_rx_ba_notif(struct iwl_mvm
*mvm
, struct iwl_rx_cmd_buffer
*rxb
)
1817 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
1818 int sta_id
, tid
, txq
, index
;
1819 struct ieee80211_tx_info ba_info
= {};
1820 struct iwl_mvm_ba_notif
*ba_notif
;
1821 struct iwl_mvm_tid_data
*tid_data
;
1822 struct iwl_mvm_sta
*mvmsta
;
1824 ba_info
.flags
= IEEE80211_TX_STAT_AMPDU
;
1826 if (iwl_mvm_has_new_tx_api(mvm
)) {
1827 struct iwl_mvm_compressed_ba_notif
*ba_res
=
1831 sta_id
= ba_res
->sta_id
;
1832 ba_info
.status
.ampdu_ack_len
= (u8
)le16_to_cpu(ba_res
->done
);
1833 ba_info
.status
.ampdu_len
= (u8
)le16_to_cpu(ba_res
->txed
);
1834 ba_info
.status
.tx_time
=
1835 (u16
)le32_to_cpu(ba_res
->wireless_time
);
1836 ba_info
.status
.status_driver_data
[0] =
1837 (void *)(uintptr_t)ba_res
->reduced_txp
;
1839 if (!le16_to_cpu(ba_res
->tfd_cnt
))
1843 for (i
= 0; i
< le16_to_cpu(ba_res
->tfd_cnt
); i
++) {
1844 struct iwl_mvm_compressed_ba_tfd
*ba_tfd
=
1847 iwl_mvm_tx_reclaim(mvm
, sta_id
, ba_tfd
->tid
,
1848 (int)(le16_to_cpu(ba_tfd
->q_num
)),
1849 le16_to_cpu(ba_tfd
->tfd_index
),
1851 le32_to_cpu(ba_res
->tx_rate
));
1855 IWL_DEBUG_TX_REPLY(mvm
,
1856 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n",
1857 sta_id
, le32_to_cpu(ba_res
->flags
),
1858 le16_to_cpu(ba_res
->txed
),
1859 le16_to_cpu(ba_res
->done
));
1863 ba_notif
= (void *)pkt
->data
;
1864 sta_id
= ba_notif
->sta_id
;
1865 tid
= ba_notif
->tid
;
1866 /* "flow" corresponds to Tx queue */
1867 txq
= le16_to_cpu(ba_notif
->scd_flow
);
1868 /* "ssn" is start of block-ack Tx window, corresponds to index
1869 * (in Tx queue's circular buffer) of first TFD/frame in window */
1870 index
= le16_to_cpu(ba_notif
->scd_ssn
);
1873 mvmsta
= iwl_mvm_sta_from_staid_rcu(mvm
, sta_id
);
1874 if (WARN_ON_ONCE(!mvmsta
)) {
1879 tid_data
= &mvmsta
->tid_data
[tid
];
1881 ba_info
.status
.ampdu_ack_len
= ba_notif
->txed_2_done
;
1882 ba_info
.status
.ampdu_len
= ba_notif
->txed
;
1883 ba_info
.status
.tx_time
= tid_data
->tx_time
;
1884 ba_info
.status
.status_driver_data
[0] =
1885 (void *)(uintptr_t)ba_notif
->reduced_txp
;
1889 iwl_mvm_tx_reclaim(mvm
, sta_id
, tid
, txq
, index
, &ba_info
,
1890 tid_data
->rate_n_flags
);
1892 IWL_DEBUG_TX_REPLY(mvm
,
1893 "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
1894 ba_notif
->sta_addr
, ba_notif
->sta_id
);
1896 IWL_DEBUG_TX_REPLY(mvm
,
1897 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1898 ba_notif
->tid
, le16_to_cpu(ba_notif
->seq_ctl
),
1899 le64_to_cpu(ba_notif
->bitmap
), txq
, index
,
1900 ba_notif
->txed
, ba_notif
->txed_2_done
);
1902 IWL_DEBUG_TX_REPLY(mvm
, "reduced txp from ba notif %d\n",
1903 ba_notif
->reduced_txp
);
1907 * Note that there are transports that buffer frames before they reach
1908 * the firmware. This means that after flush_tx_path is called, the
1909 * queue might not be empty. The race-free way to handle this is to:
1910 * 1) set the station as draining
1911 * 2) flush the Tx path
1912 * 3) wait for the transport queues to be empty
1914 int iwl_mvm_flush_tx_path(struct iwl_mvm
*mvm
, u32 tfd_msk
, u32 flags
)
1917 struct iwl_tx_path_flush_cmd_v1 flush_cmd
= {
1918 .queues_ctl
= cpu_to_le32(tfd_msk
),
1919 .flush_ctl
= cpu_to_le16(DUMP_TX_FIFO_FLUSH
),
1922 WARN_ON(iwl_mvm_has_new_tx_api(mvm
));
1924 ret
= iwl_mvm_send_cmd_pdu(mvm
, TXPATH_FLUSH
, flags
,
1925 sizeof(flush_cmd
), &flush_cmd
);
1927 IWL_ERR(mvm
, "Failed to send flush command (%d)\n", ret
);
1931 int iwl_mvm_flush_sta_tids(struct iwl_mvm
*mvm
, u32 sta_id
,
1932 u16 tids
, u32 flags
)
1935 struct iwl_tx_path_flush_cmd flush_cmd
= {
1936 .sta_id
= cpu_to_le32(sta_id
),
1937 .tid_mask
= cpu_to_le16(tids
),
1940 WARN_ON(!iwl_mvm_has_new_tx_api(mvm
));
1942 ret
= iwl_mvm_send_cmd_pdu(mvm
, TXPATH_FLUSH
, flags
,
1943 sizeof(flush_cmd
), &flush_cmd
);
1945 IWL_ERR(mvm
, "Failed to send flush command (%d)\n", ret
);
1949 int iwl_mvm_flush_sta(struct iwl_mvm
*mvm
, void *sta
, bool internal
, u32 flags
)
1951 struct iwl_mvm_int_sta
*int_sta
= sta
;
1952 struct iwl_mvm_sta
*mvm_sta
= sta
;
1954 if (iwl_mvm_has_new_tx_api(mvm
)) {
1956 return iwl_mvm_flush_sta_tids(mvm
, int_sta
->sta_id
,
1957 BIT(IWL_MGMT_TID
), flags
);
1959 return iwl_mvm_flush_sta_tids(mvm
, mvm_sta
->sta_id
,
1964 return iwl_mvm_flush_tx_path(mvm
, int_sta
->tfd_queue_msk
,
1967 return iwl_mvm_flush_tx_path(mvm
, mvm_sta
->tfd_queue_msk
, flags
);