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;
188 /* mac header len should include IV, size is in words */
189 if (info
->control
.hw_key
)
190 mh_len
+= info
->control
.hw_key
->iv_len
;
192 offload_assist
|= mh_len
<< TX_CMD_OFFLD_MH_SIZE
;
196 return offload_assist
;
200 * Sets most of the Tx cmd's fields
202 void iwl_mvm_set_tx_cmd(struct iwl_mvm
*mvm
, struct sk_buff
*skb
,
203 struct iwl_tx_cmd
*tx_cmd
,
204 struct ieee80211_tx_info
*info
, u8 sta_id
)
206 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
207 __le16 fc
= hdr
->frame_control
;
208 u32 tx_flags
= le32_to_cpu(tx_cmd
->tx_flags
);
209 u32 len
= skb
->len
+ FCS_LEN
;
210 u16 offload_assist
= 0;
213 if (!(info
->flags
& IEEE80211_TX_CTL_NO_ACK
))
214 tx_flags
|= TX_CMD_FLG_ACK
;
216 tx_flags
&= ~TX_CMD_FLG_ACK
;
218 if (ieee80211_is_probe_resp(fc
))
219 tx_flags
|= TX_CMD_FLG_TSF
;
221 if (ieee80211_has_morefrags(fc
))
222 tx_flags
|= TX_CMD_FLG_MORE_FRAG
;
224 if (ieee80211_is_data_qos(fc
)) {
225 u8
*qc
= ieee80211_get_qos_ctl(hdr
);
226 tx_cmd
->tid_tspec
= qc
[0] & 0xf;
227 tx_flags
&= ~TX_CMD_FLG_SEQ_CTL
;
228 if (*qc
& IEEE80211_QOS_CTL_A_MSDU_PRESENT
)
229 offload_assist
|= BIT(TX_CMD_OFFLD_AMSDU
);
230 } else if (ieee80211_is_back_req(fc
)) {
231 struct ieee80211_bar
*bar
= (void *)skb
->data
;
232 u16 control
= le16_to_cpu(bar
->control
);
233 u16 ssn
= le16_to_cpu(bar
->start_seq_num
);
235 tx_flags
|= TX_CMD_FLG_ACK
| TX_CMD_FLG_BAR
;
236 tx_cmd
->tid_tspec
= (control
&
237 IEEE80211_BAR_CTRL_TID_INFO_MASK
) >>
238 IEEE80211_BAR_CTRL_TID_INFO_SHIFT
;
239 WARN_ON_ONCE(tx_cmd
->tid_tspec
>= IWL_MAX_TID_COUNT
);
240 iwl_mvm_bar_check_trigger(mvm
, bar
->ra
, tx_cmd
->tid_tspec
,
243 tx_cmd
->tid_tspec
= IWL_TID_NON_QOS
;
244 if (info
->flags
& IEEE80211_TX_CTL_ASSIGN_SEQ
)
245 tx_flags
|= TX_CMD_FLG_SEQ_CTL
;
247 tx_flags
&= ~TX_CMD_FLG_SEQ_CTL
;
250 /* Default to 0 (BE) when tid_spec is set to IWL_TID_NON_QOS */
251 if (tx_cmd
->tid_tspec
< IWL_MAX_TID_COUNT
)
252 ac
= tid_to_mac80211_ac
[tx_cmd
->tid_tspec
];
254 ac
= tid_to_mac80211_ac
[0];
256 tx_flags
|= iwl_mvm_bt_coex_tx_prio(mvm
, hdr
, info
, ac
) <<
257 TX_CMD_FLG_BT_PRIO_POS
;
259 if (ieee80211_is_mgmt(fc
)) {
260 if (ieee80211_is_assoc_req(fc
) || ieee80211_is_reassoc_req(fc
))
261 tx_cmd
->pm_frame_timeout
= cpu_to_le16(PM_FRAME_ASSOC
);
262 else if (ieee80211_is_action(fc
))
263 tx_cmd
->pm_frame_timeout
= cpu_to_le16(PM_FRAME_NONE
);
265 tx_cmd
->pm_frame_timeout
= cpu_to_le16(PM_FRAME_MGMT
);
267 /* The spec allows Action frames in A-MPDU, we don't support
270 WARN_ON_ONCE(info
->flags
& IEEE80211_TX_CTL_AMPDU
);
271 } else if (info
->control
.flags
& IEEE80211_TX_CTRL_PORT_CTRL_PROTO
) {
272 tx_cmd
->pm_frame_timeout
= cpu_to_le16(PM_FRAME_MGMT
);
274 tx_cmd
->pm_frame_timeout
= cpu_to_le16(PM_FRAME_NONE
);
277 if (ieee80211_is_data(fc
) && len
> mvm
->rts_threshold
&&
278 !is_multicast_ether_addr(ieee80211_get_DA(hdr
)))
279 tx_flags
|= TX_CMD_FLG_PROT_REQUIRE
;
281 if (fw_has_capa(&mvm
->fw
->ucode_capa
,
282 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT
) &&
283 ieee80211_action_contains_tpc(skb
))
284 tx_flags
|= TX_CMD_FLG_WRITE_TX_POWER
;
286 tx_cmd
->tx_flags
= cpu_to_le32(tx_flags
);
287 /* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */
288 tx_cmd
->len
= cpu_to_le16((u16
)skb
->len
);
289 tx_cmd
->life_time
= cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE
);
290 tx_cmd
->sta_id
= sta_id
;
292 /* padding is inserted later in transport */
293 if (ieee80211_hdrlen(fc
) % 4 &&
294 !(offload_assist
& BIT(TX_CMD_OFFLD_AMSDU
)))
295 offload_assist
|= BIT(TX_CMD_OFFLD_PAD
);
297 tx_cmd
->offload_assist
|=
298 cpu_to_le16(iwl_mvm_tx_csum(mvm
, skb
, hdr
, info
,
302 static u32
iwl_mvm_get_tx_rate(struct iwl_mvm
*mvm
,
303 struct ieee80211_tx_info
*info
,
304 struct ieee80211_sta
*sta
)
310 /* HT rate doesn't make sense for a non data frame */
311 WARN_ONCE(info
->control
.rates
[0].flags
& IEEE80211_TX_RC_MCS
,
312 "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame\n",
313 info
->control
.rates
[0].flags
,
314 info
->control
.rates
[0].idx
);
316 rate_idx
= info
->control
.rates
[0].idx
;
317 /* if the rate isn't a well known legacy rate, take the lowest one */
318 if (rate_idx
< 0 || rate_idx
>= IWL_RATE_COUNT_LEGACY
)
319 rate_idx
= rate_lowest_index(
320 &mvm
->nvm_data
->bands
[info
->band
], sta
);
322 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
323 if (info
->band
== NL80211_BAND_5GHZ
)
324 rate_idx
+= IWL_FIRST_OFDM_RATE
;
326 /* For 2.4 GHZ band, check that there is no need to remap */
327 BUILD_BUG_ON(IWL_FIRST_CCK_RATE
!= 0);
329 /* Get PLCP rate for tx_cmd->rate_n_flags */
330 rate_plcp
= iwl_mvm_mac80211_idx_to_hwrate(rate_idx
);
332 if (info
->band
== NL80211_BAND_2GHZ
&&
333 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm
))
334 rate_flags
= mvm
->cfg
->non_shared_ant
<< RATE_MCS_ANT_POS
;
337 BIT(mvm
->mgmt_last_antenna_idx
) << RATE_MCS_ANT_POS
;
339 /* Set CCK flag as needed */
340 if ((rate_idx
>= IWL_FIRST_CCK_RATE
) && (rate_idx
<= IWL_LAST_CCK_RATE
))
341 rate_flags
|= RATE_MCS_CCK_MSK
;
343 return (u32
)rate_plcp
| rate_flags
;
347 * Sets the fields in the Tx cmd that are rate related
349 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm
*mvm
, struct iwl_tx_cmd
*tx_cmd
,
350 struct ieee80211_tx_info
*info
,
351 struct ieee80211_sta
*sta
, __le16 fc
)
353 /* Set retry limit on RTS packets */
354 tx_cmd
->rts_retry_limit
= IWL_RTS_DFAULT_RETRY_LIMIT
;
356 /* Set retry limit on DATA packets and Probe Responses*/
357 if (ieee80211_is_probe_resp(fc
)) {
358 tx_cmd
->data_retry_limit
= IWL_MGMT_DFAULT_RETRY_LIMIT
;
359 tx_cmd
->rts_retry_limit
=
360 min(tx_cmd
->data_retry_limit
, tx_cmd
->rts_retry_limit
);
361 } else if (ieee80211_is_back_req(fc
)) {
362 tx_cmd
->data_retry_limit
= IWL_BAR_DFAULT_RETRY_LIMIT
;
364 tx_cmd
->data_retry_limit
= IWL_DEFAULT_TX_RETRY
;
368 * for data packets, rate info comes from the table inside the fw. This
369 * table is controlled by LINK_QUALITY commands
372 if (ieee80211_is_data(fc
) && sta
) {
373 tx_cmd
->initial_rate_index
= 0;
374 tx_cmd
->tx_flags
|= cpu_to_le32(TX_CMD_FLG_STA_RATE
);
376 } else if (ieee80211_is_back_req(fc
)) {
378 cpu_to_le32(TX_CMD_FLG_ACK
| TX_CMD_FLG_BAR
);
381 mvm
->mgmt_last_antenna_idx
=
382 iwl_mvm_next_antenna(mvm
, iwl_mvm_get_valid_tx_ant(mvm
),
383 mvm
->mgmt_last_antenna_idx
);
385 /* Set the rate in the TX cmd */
386 tx_cmd
->rate_n_flags
= cpu_to_le32(iwl_mvm_get_tx_rate(mvm
, info
, sta
));
389 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info
*info
,
392 struct ieee80211_key_conf
*keyconf
= info
->control
.hw_key
;
395 pn
= atomic64_inc_return(&keyconf
->tx_pn
);
398 crypto_hdr
[3] = 0x20 | (keyconf
->keyidx
<< 6);
399 crypto_hdr
[1] = pn
>> 8;
400 crypto_hdr
[4] = pn
>> 16;
401 crypto_hdr
[5] = pn
>> 24;
402 crypto_hdr
[6] = pn
>> 32;
403 crypto_hdr
[7] = pn
>> 40;
407 * Sets the fields in the Tx cmd that are crypto related
409 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm
*mvm
,
410 struct ieee80211_tx_info
*info
,
411 struct iwl_tx_cmd
*tx_cmd
,
412 struct sk_buff
*skb_frag
,
415 struct ieee80211_key_conf
*keyconf
= info
->control
.hw_key
;
416 u8
*crypto_hdr
= skb_frag
->data
+ hdrlen
;
419 switch (keyconf
->cipher
) {
420 case WLAN_CIPHER_SUITE_CCMP
:
421 case WLAN_CIPHER_SUITE_CCMP_256
:
422 iwl_mvm_set_tx_cmd_ccmp(info
, tx_cmd
);
423 iwl_mvm_set_tx_cmd_pn(info
, crypto_hdr
);
426 case WLAN_CIPHER_SUITE_TKIP
:
427 tx_cmd
->sec_ctl
= TX_CMD_SEC_TKIP
;
428 pn
= atomic64_inc_return(&keyconf
->tx_pn
);
429 ieee80211_tkip_add_iv(crypto_hdr
, keyconf
, pn
);
430 ieee80211_get_tkip_p2k(keyconf
, skb_frag
, tx_cmd
->key
);
433 case WLAN_CIPHER_SUITE_WEP104
:
434 tx_cmd
->sec_ctl
|= TX_CMD_SEC_KEY128
;
436 case WLAN_CIPHER_SUITE_WEP40
:
437 tx_cmd
->sec_ctl
|= TX_CMD_SEC_WEP
|
438 ((keyconf
->keyidx
<< TX_CMD_SEC_WEP_KEY_IDX_POS
) &
439 TX_CMD_SEC_WEP_KEY_IDX_MSK
);
441 memcpy(&tx_cmd
->key
[3], keyconf
->key
, keyconf
->keylen
);
443 case WLAN_CIPHER_SUITE_GCMP
:
444 case WLAN_CIPHER_SUITE_GCMP_256
:
445 /* TODO: Taking the key from the table might introduce a race
446 * when PTK rekeying is done, having an old packets with a PN
447 * based on the old key but the message encrypted with a new
449 * Need to handle this.
451 tx_cmd
->sec_ctl
|= TX_CMD_SEC_GCMP
| TX_CMD_SEC_KEY_FROM_TABLE
;
452 tx_cmd
->key
[0] = keyconf
->hw_key_idx
;
453 iwl_mvm_set_tx_cmd_pn(info
, crypto_hdr
);
456 tx_cmd
->sec_ctl
|= TX_CMD_SEC_EXT
;
461 * Allocates and sets the Tx cmd the driver data pointers in the skb
463 static struct iwl_device_cmd
*
464 iwl_mvm_set_tx_params(struct iwl_mvm
*mvm
, struct sk_buff
*skb
,
465 struct ieee80211_tx_info
*info
, int hdrlen
,
466 struct ieee80211_sta
*sta
, u8 sta_id
)
468 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
469 struct iwl_device_cmd
*dev_cmd
;
470 struct iwl_tx_cmd
*tx_cmd
;
472 dev_cmd
= iwl_trans_alloc_tx_cmd(mvm
->trans
);
474 if (unlikely(!dev_cmd
))
477 /* Make sure we zero enough of dev_cmd */
478 BUILD_BUG_ON(sizeof(struct iwl_tx_cmd_gen2
) > sizeof(*tx_cmd
));
480 memset(dev_cmd
, 0, sizeof(dev_cmd
->hdr
) + sizeof(*tx_cmd
));
481 dev_cmd
->hdr
.cmd
= TX_CMD
;
483 if (iwl_mvm_has_new_tx_api(mvm
)) {
484 struct iwl_tx_cmd_gen2
*cmd
= (void *)dev_cmd
->payload
;
485 u16 offload_assist
= 0;
487 if (ieee80211_is_data_qos(hdr
->frame_control
)) {
488 u8
*qc
= ieee80211_get_qos_ctl(hdr
);
490 if (*qc
& IEEE80211_QOS_CTL_A_MSDU_PRESENT
)
491 offload_assist
|= BIT(TX_CMD_OFFLD_AMSDU
);
494 offload_assist
= iwl_mvm_tx_csum(mvm
, skb
, hdr
, info
,
497 /* padding is inserted later in transport */
498 if (ieee80211_hdrlen(hdr
->frame_control
) % 4 &&
499 !(offload_assist
& BIT(TX_CMD_OFFLD_AMSDU
)))
500 offload_assist
|= BIT(TX_CMD_OFFLD_PAD
);
502 cmd
->offload_assist
|= cpu_to_le16(offload_assist
);
504 /* Total # bytes to be transmitted */
505 cmd
->len
= cpu_to_le16((u16
)skb
->len
);
507 /* Copy MAC header from skb into command buffer */
508 memcpy(cmd
->hdr
, hdr
, hdrlen
);
510 if (!info
->control
.hw_key
)
511 cmd
->flags
|= cpu_to_le32(IWL_TX_FLAGS_ENCRYPT_DIS
);
513 /* For data packets rate info comes from the fw */
514 if (ieee80211_is_data(hdr
->frame_control
) && sta
)
517 cmd
->flags
|= cpu_to_le32(IWL_TX_FLAGS_CMD_RATE
);
519 cpu_to_le32(iwl_mvm_get_tx_rate(mvm
, info
, sta
));
524 tx_cmd
= (struct iwl_tx_cmd
*)dev_cmd
->payload
;
526 if (info
->control
.hw_key
)
527 iwl_mvm_set_tx_cmd_crypto(mvm
, info
, tx_cmd
, skb
, hdrlen
);
529 iwl_mvm_set_tx_cmd(mvm
, skb
, tx_cmd
, info
, sta_id
);
531 iwl_mvm_set_tx_cmd_rate(mvm
, tx_cmd
, info
, sta
, hdr
->frame_control
);
533 /* Copy MAC header from skb into command buffer */
534 memcpy(tx_cmd
->hdr
, hdr
, hdrlen
);
540 static void iwl_mvm_skb_prepare_status(struct sk_buff
*skb
,
541 struct iwl_device_cmd
*cmd
)
543 struct ieee80211_tx_info
*skb_info
= IEEE80211_SKB_CB(skb
);
545 memset(&skb_info
->status
, 0, sizeof(skb_info
->status
));
546 memset(skb_info
->driver_data
, 0, sizeof(skb_info
->driver_data
));
548 skb_info
->driver_data
[1] = cmd
;
551 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm
*mvm
,
552 struct ieee80211_tx_info
*info
, __le16 fc
)
554 struct iwl_mvm_vif
*mvmvif
;
556 if (!iwl_mvm_is_dqa_supported(mvm
))
557 return info
->hw_queue
;
559 mvmvif
= iwl_mvm_vif_from_mac80211(info
->control
.vif
);
561 switch (info
->control
.vif
->type
) {
562 case NL80211_IFTYPE_AP
:
563 case NL80211_IFTYPE_ADHOC
:
565 * Handle legacy hostapd as well, where station will be added
566 * only just before sending the association response.
567 * Also take care of the case where we send a deauth to a
568 * station that we don't have, or similarly an association
569 * response (with non-success status) for a station we can't
571 * Also, disassociate frames might happen, particular with
572 * reason 7 ("Class 3 frame received from nonassociated STA").
574 if (ieee80211_is_probe_resp(fc
) || ieee80211_is_auth(fc
) ||
575 ieee80211_is_deauth(fc
) || ieee80211_is_assoc_resp(fc
) ||
576 ieee80211_is_disassoc(fc
))
577 return mvm
->probe_queue
;
578 if (info
->hw_queue
== info
->control
.vif
->cab_queue
)
579 return mvmvif
->cab_queue
;
581 WARN_ONCE(info
->control
.vif
->type
!= NL80211_IFTYPE_ADHOC
,
582 "fc=0x%02x", le16_to_cpu(fc
));
583 return mvm
->probe_queue
;
584 case NL80211_IFTYPE_P2P_DEVICE
:
585 if (ieee80211_is_mgmt(fc
))
586 return mvm
->p2p_dev_queue
;
587 if (info
->hw_queue
== info
->control
.vif
->cab_queue
)
588 return mvmvif
->cab_queue
;
591 return mvm
->p2p_dev_queue
;
593 WARN_ONCE(1, "Not a ctrl vif, no available queue\n");
598 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm
*mvm
, struct sk_buff
*skb
)
600 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
601 struct ieee80211_tx_info
*skb_info
= IEEE80211_SKB_CB(skb
);
602 struct ieee80211_tx_info info
;
603 struct iwl_device_cmd
*dev_cmd
;
605 int hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
608 /* IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used
609 * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel
610 * queue. STATION (HS2.0) uses the auxiliary context of the FW,
611 * and hence needs to be sent on the aux queue
613 if (skb_info
->hw_queue
== IWL_MVM_OFFCHANNEL_QUEUE
&&
614 skb_info
->control
.vif
->type
== NL80211_IFTYPE_STATION
)
615 skb_info
->hw_queue
= mvm
->aux_queue
;
617 memcpy(&info
, skb
->cb
, sizeof(info
));
619 if (WARN_ON_ONCE(info
.flags
& IEEE80211_TX_CTL_AMPDU
))
622 if (WARN_ON_ONCE(info
.flags
& IEEE80211_TX_CTL_SEND_AFTER_DTIM
&&
623 (!info
.control
.vif
||
624 info
.hw_queue
!= info
.control
.vif
->cab_queue
)))
627 queue
= info
.hw_queue
;
630 * If the interface on which the frame is sent is the P2P_DEVICE
631 * or an AP/GO interface use the broadcast station associated
632 * with it; otherwise if the interface is a managed interface
633 * use the AP station associated with it for multicast traffic
634 * (this is not possible for unicast packets as a TLDS discovery
635 * response are sent without a station entry); otherwise use the
638 sta_id
= mvm
->aux_sta
.sta_id
;
639 if (info
.control
.vif
) {
640 struct iwl_mvm_vif
*mvmvif
=
641 iwl_mvm_vif_from_mac80211(info
.control
.vif
);
643 if (info
.control
.vif
->type
== NL80211_IFTYPE_P2P_DEVICE
||
644 info
.control
.vif
->type
== NL80211_IFTYPE_AP
||
645 info
.control
.vif
->type
== NL80211_IFTYPE_ADHOC
) {
646 sta_id
= mvmvif
->bcast_sta
.sta_id
;
647 queue
= iwl_mvm_get_ctrl_vif_queue(mvm
, &info
,
651 } else if (info
.control
.vif
->type
== NL80211_IFTYPE_STATION
&&
652 is_multicast_ether_addr(hdr
->addr1
)) {
653 u8 ap_sta_id
= ACCESS_ONCE(mvmvif
->ap_sta_id
);
655 if (ap_sta_id
!= IWL_MVM_INVALID_STA
)
657 } else if (iwl_mvm_is_dqa_supported(mvm
) &&
658 info
.control
.vif
->type
== NL80211_IFTYPE_MONITOR
) {
659 queue
= mvm
->aux_queue
;
663 IWL_DEBUG_TX(mvm
, "station Id %d, queue=%d\n", sta_id
, queue
);
665 dev_cmd
= iwl_mvm_set_tx_params(mvm
, skb
, &info
, hdrlen
, NULL
, sta_id
);
669 /* From now on, we cannot access info->control */
670 iwl_mvm_skb_prepare_status(skb
, dev_cmd
);
672 if (iwl_trans_tx(mvm
->trans
, skb
, dev_cmd
, queue
)) {
673 iwl_trans_free_tx_cmd(mvm
->trans
, dev_cmd
);
678 * Increase the pending frames counter, so that later when a reply comes
679 * in and the counter is decreased - we don't start getting negative
681 * Note that we don't need to make sure it isn't agg'd, since we're
683 * For DQA mode - we shouldn't increase it though
685 if (!iwl_mvm_is_dqa_supported(mvm
))
686 atomic_inc(&mvm
->pending_frames
[sta_id
]);
692 static int iwl_mvm_tx_tso(struct iwl_mvm
*mvm
, struct sk_buff
*skb
,
693 struct ieee80211_tx_info
*info
,
694 struct ieee80211_sta
*sta
,
695 struct sk_buff_head
*mpdus_skb
)
697 struct iwl_mvm_sta
*mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
698 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
699 unsigned int mss
= skb_shinfo(skb
)->gso_size
;
700 struct sk_buff
*tmp
, *next
;
701 char cb
[sizeof(skb
->cb
)];
702 unsigned int num_subframes
, tcp_payload_len
, subf_len
, max_amsdu_len
;
703 bool ipv4
= (skb
->protocol
== htons(ETH_P_IP
));
704 u16 ip_base_id
= ipv4
? ntohs(ip_hdr(skb
)->id
) : 0;
705 u16 snap_ip_tcp
, pad
, i
= 0;
706 unsigned int dbg_max_amsdu_len
;
707 netdev_features_t netdev_features
= NETIF_F_CSUM_MASK
| NETIF_F_SG
;
710 snap_ip_tcp
= 8 + skb_transport_header(skb
) - skb_network_header(skb
) +
713 dbg_max_amsdu_len
= ACCESS_ONCE(mvm
->max_amsdu_len
);
715 if (!sta
->max_amsdu_len
||
716 !ieee80211_is_data_qos(hdr
->frame_control
) ||
717 (!mvmsta
->tlc_amsdu
&& !dbg_max_amsdu_len
)) {
723 qc
= ieee80211_get_qos_ctl(hdr
);
724 tid
= *qc
& IEEE80211_QOS_CTL_TID_MASK
;
725 if (WARN_ON_ONCE(tid
>= IWL_MAX_TID_COUNT
))
729 * Do not build AMSDU for IPv6 with extension headers.
730 * ask stack to segment and checkum the generated MPDUs for us.
732 if (skb
->protocol
== htons(ETH_P_IPV6
) &&
733 ((struct ipv6hdr
*)skb_network_header(skb
))->nexthdr
!=
737 netdev_features
&= ~NETIF_F_CSUM_MASK
;
742 * No need to lock amsdu_in_ampdu_allowed since it can't be modified
743 * during an BA session.
745 if (info
->flags
& IEEE80211_TX_CTL_AMPDU
&&
746 !mvmsta
->tid_data
[tid
].amsdu_in_ampdu_allowed
) {
752 max_amsdu_len
= sta
->max_amsdu_len
;
754 /* the Tx FIFO to which this A-MSDU will be routed */
755 txf
= iwl_mvm_ac_to_tx_fifo
[tid_to_mac80211_ac
[tid
]];
758 * Don't send an AMSDU that will be longer than the TXF.
759 * Add a security margin of 256 for the TX command + headers.
760 * We also want to have the start of the next packet inside the
761 * fifo to be able to send bursts.
763 max_amsdu_len
= min_t(unsigned int, max_amsdu_len
,
764 mvm
->smem_cfg
.lmac
[0].txfifo_size
[txf
] - 256);
766 if (unlikely(dbg_max_amsdu_len
))
767 max_amsdu_len
= min_t(unsigned int, max_amsdu_len
,
771 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not
772 * supported. This is a spec requirement (IEEE 802.11-2015
773 * section 8.7.3 NOTE 3).
775 if (info
->flags
& IEEE80211_TX_CTL_AMPDU
&&
776 !sta
->vht_cap
.vht_supported
)
777 max_amsdu_len
= min_t(unsigned int, max_amsdu_len
, 4095);
779 /* Sub frame header + SNAP + IP header + TCP header + MSS */
780 subf_len
= sizeof(struct ethhdr
) + snap_ip_tcp
+ mss
;
781 pad
= (4 - subf_len
) & 0x3;
784 * If we have N subframes in the A-MSDU, then the A-MSDU's size is
785 * N * subf_len + (N - 1) * pad.
787 num_subframes
= (max_amsdu_len
+ pad
) / (subf_len
+ pad
);
788 if (num_subframes
> 1)
789 *qc
|= IEEE80211_QOS_CTL_A_MSDU_PRESENT
;
791 tcp_payload_len
= skb_tail_pointer(skb
) - skb_transport_header(skb
) -
792 tcp_hdrlen(skb
) + skb
->data_len
;
795 * Make sure we have enough TBs for the A-MSDU:
796 * 2 for each subframe
797 * 1 more for each fragment
798 * 1 more for the potential data in the header
801 min_t(unsigned int, num_subframes
,
802 (mvm
->trans
->max_skb_frags
- 1 -
803 skb_shinfo(skb
)->nr_frags
) / 2);
805 /* This skb fits in one single A-MSDU */
806 if (num_subframes
* mss
>= tcp_payload_len
) {
807 __skb_queue_tail(mpdus_skb
, skb
);
812 * Trick the segmentation function to make it
813 * create SKBs that can fit into one A-MSDU.
816 skb_shinfo(skb
)->gso_size
= num_subframes
* mss
;
817 memcpy(cb
, skb
->cb
, sizeof(cb
));
819 next
= skb_gso_segment(skb
, netdev_features
);
820 skb_shinfo(skb
)->gso_size
= mss
;
821 if (WARN_ON_ONCE(IS_ERR(next
)))
830 memcpy(tmp
->cb
, cb
, sizeof(tmp
->cb
));
832 * Compute the length of all the data added for the A-MSDU.
833 * This will be used to compute the length to write in the TX
834 * command. We have: SNAP + IP + TCP for n -1 subframes and
835 * ETH header for n subframes.
837 tcp_payload_len
= skb_tail_pointer(tmp
) -
838 skb_transport_header(tmp
) -
839 tcp_hdrlen(tmp
) + tmp
->data_len
;
842 ip_hdr(tmp
)->id
= htons(ip_base_id
+ i
* num_subframes
);
844 if (tcp_payload_len
> mss
) {
845 skb_shinfo(tmp
)->gso_size
= mss
;
847 if (ieee80211_is_data_qos(hdr
->frame_control
)) {
848 qc
= ieee80211_get_qos_ctl((void *)tmp
->data
);
851 ip_send_check(ip_hdr(tmp
));
852 *qc
&= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT
;
854 skb_shinfo(tmp
)->gso_size
= 0;
860 __skb_queue_tail(mpdus_skb
, tmp
);
866 #else /* CONFIG_INET */
867 static int iwl_mvm_tx_tso(struct iwl_mvm
*mvm
, struct sk_buff
*skb
,
868 struct ieee80211_tx_info
*info
,
869 struct ieee80211_sta
*sta
,
870 struct sk_buff_head
*mpdus_skb
)
872 /* Impossible to get TSO with CONFIG_INET */
879 static void iwl_mvm_tx_add_stream(struct iwl_mvm
*mvm
,
880 struct iwl_mvm_sta
*mvm_sta
, u8 tid
,
883 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
884 u8 mac_queue
= info
->hw_queue
;
885 struct sk_buff_head
*deferred_tx_frames
;
887 lockdep_assert_held(&mvm_sta
->lock
);
889 mvm_sta
->deferred_traffic_tid_map
|= BIT(tid
);
890 set_bit(mvm_sta
->sta_id
, mvm
->sta_deferred_frames
);
892 deferred_tx_frames
= &mvm_sta
->tid_data
[tid
].deferred_tx_frames
;
894 skb_queue_tail(deferred_tx_frames
, skb
);
897 * The first deferred frame should've stopped the MAC queues, so we
898 * should never get a second deferred frame for the RA/TID.
900 if (!WARN(skb_queue_len(deferred_tx_frames
) != 1,
901 "RATID %d/%d has %d deferred frames\n", mvm_sta
->sta_id
, tid
,
902 skb_queue_len(deferred_tx_frames
))) {
903 iwl_mvm_stop_mac_queues(mvm
, BIT(mac_queue
));
904 schedule_work(&mvm
->add_stream_wk
);
908 /* Check if there are any timed-out TIDs on a given shared TXQ */
909 static bool iwl_mvm_txq_should_update(struct iwl_mvm
*mvm
, int txq_id
)
911 unsigned long queue_tid_bitmap
= mvm
->queue_info
[txq_id
].tid_bitmap
;
912 unsigned long now
= jiffies
;
915 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm
)))
918 for_each_set_bit(tid
, &queue_tid_bitmap
, IWL_MAX_TID_COUNT
+ 1) {
919 if (time_before(mvm
->queue_info
[txq_id
].last_frame_time
[tid
] +
920 IWL_MVM_DQA_QUEUE_TIMEOUT
, now
))
928 * Sets the fields in the Tx cmd that are crypto related
930 static int iwl_mvm_tx_mpdu(struct iwl_mvm
*mvm
, struct sk_buff
*skb
,
931 struct ieee80211_tx_info
*info
,
932 struct ieee80211_sta
*sta
)
934 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
935 struct iwl_mvm_sta
*mvmsta
;
936 struct iwl_device_cmd
*dev_cmd
;
939 u8 tid
= IWL_MAX_TID_COUNT
;
940 u16 txq_id
= info
->hw_queue
;
941 bool is_ampdu
= false;
944 mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
945 fc
= hdr
->frame_control
;
946 hdrlen
= ieee80211_hdrlen(fc
);
948 if (WARN_ON_ONCE(!mvmsta
))
951 if (WARN_ON_ONCE(mvmsta
->sta_id
== IWL_MVM_INVALID_STA
))
954 dev_cmd
= iwl_mvm_set_tx_params(mvm
, skb
, info
, hdrlen
,
955 sta
, mvmsta
->sta_id
);
960 * we handle that entirely ourselves -- for uAPSD the firmware
961 * will always send a notification, and for PS-Poll responses
962 * we'll notify mac80211 when getting frame status
964 info
->flags
&= ~IEEE80211_TX_STATUS_EOSP
;
966 spin_lock(&mvmsta
->lock
);
968 /* nullfunc frames should go to the MGMT queue regardless of QOS,
969 * the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default
970 * assignment of MGMT TID
972 if (ieee80211_is_data_qos(fc
) && !ieee80211_is_qos_nullfunc(fc
)) {
974 qc
= ieee80211_get_qos_ctl(hdr
);
975 tid
= qc
[0] & IEEE80211_QOS_CTL_TID_MASK
;
976 if (WARN_ON_ONCE(tid
>= IWL_MAX_TID_COUNT
))
977 goto drop_unlock_sta
;
979 is_ampdu
= info
->flags
& IEEE80211_TX_CTL_AMPDU
;
980 if (WARN_ON_ONCE(is_ampdu
&&
981 mvmsta
->tid_data
[tid
].state
!= IWL_AGG_ON
))
982 goto drop_unlock_sta
;
984 seq_number
= mvmsta
->tid_data
[tid
].seq_number
;
985 seq_number
&= IEEE80211_SCTL_SEQ
;
987 if (!iwl_mvm_has_new_tx_api(mvm
)) {
988 struct iwl_tx_cmd
*tx_cmd
= (void *)dev_cmd
->payload
;
990 hdr
->seq_ctrl
&= cpu_to_le16(IEEE80211_SCTL_FRAG
);
991 hdr
->seq_ctrl
|= cpu_to_le16(seq_number
);
992 /* update the tx_cmd hdr as it was already copied */
993 tx_cmd
->hdr
->seq_ctrl
= hdr
->seq_ctrl
;
997 if (iwl_mvm_is_dqa_supported(mvm
) || is_ampdu
)
998 txq_id
= mvmsta
->tid_data
[tid
].txq_id
;
1000 if (sta
->tdls
&& !iwl_mvm_is_dqa_supported(mvm
)) {
1001 /* default to TID 0 for non-QoS packets */
1002 u8 tdls_tid
= tid
== IWL_MAX_TID_COUNT
? 0 : tid
;
1004 txq_id
= mvmsta
->hw_queue
[tid_to_mac80211_ac
[tdls_tid
]];
1007 WARN_ON_ONCE(info
->flags
& IEEE80211_TX_CTL_SEND_AFTER_DTIM
);
1009 /* Check if TXQ needs to be allocated or re-activated */
1010 if (unlikely(txq_id
== IWL_MVM_INVALID_QUEUE
||
1011 !mvmsta
->tid_data
[tid
].is_tid_active
) &&
1012 iwl_mvm_is_dqa_supported(mvm
)) {
1013 /* If TXQ needs to be allocated... */
1014 if (txq_id
== IWL_MVM_INVALID_QUEUE
) {
1015 iwl_mvm_tx_add_stream(mvm
, mvmsta
, tid
, skb
);
1018 * The frame is now deferred, and the worker scheduled
1019 * will re-allocate it, so we can free it for now.
1021 iwl_trans_free_tx_cmd(mvm
->trans
, dev_cmd
);
1022 spin_unlock(&mvmsta
->lock
);
1026 /* queue should always be active in new TX path */
1027 WARN_ON(iwl_mvm_has_new_tx_api(mvm
));
1029 /* If we are here - TXQ exists and needs to be re-activated */
1030 spin_lock(&mvm
->queue_info_lock
);
1031 mvm
->queue_info
[txq_id
].status
= IWL_MVM_QUEUE_READY
;
1032 mvmsta
->tid_data
[tid
].is_tid_active
= true;
1033 spin_unlock(&mvm
->queue_info_lock
);
1035 IWL_DEBUG_TX_QUEUES(mvm
, "Re-activating queue %d for TX\n",
1039 if (iwl_mvm_is_dqa_supported(mvm
) && !iwl_mvm_has_new_tx_api(mvm
)) {
1040 /* Keep track of the time of the last frame for this RA/TID */
1041 mvm
->queue_info
[txq_id
].last_frame_time
[tid
] = jiffies
;
1044 * If we have timed-out TIDs - schedule the worker that will
1045 * reconfig the queues and update them
1047 * Note that the mvm->queue_info_lock isn't being taken here in
1048 * order to not serialize the TX flow. This isn't dangerous
1049 * because scheduling mvm->add_stream_wk can't ruin the state,
1050 * and if we DON'T schedule it due to some race condition then
1051 * next TX we get here we will.
1053 if (unlikely(mvm
->queue_info
[txq_id
].status
==
1054 IWL_MVM_QUEUE_SHARED
&&
1055 iwl_mvm_txq_should_update(mvm
, txq_id
)))
1056 schedule_work(&mvm
->add_stream_wk
);
1059 IWL_DEBUG_TX(mvm
, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta
->sta_id
,
1060 tid
, txq_id
, IEEE80211_SEQ_TO_SN(seq_number
));
1062 /* From now on, we cannot access info->control */
1063 iwl_mvm_skb_prepare_status(skb
, dev_cmd
);
1065 if (iwl_trans_tx(mvm
->trans
, skb
, dev_cmd
, txq_id
))
1066 goto drop_unlock_sta
;
1068 if (tid
< IWL_MAX_TID_COUNT
&& !ieee80211_has_morefrags(fc
))
1069 mvmsta
->tid_data
[tid
].seq_number
= seq_number
+ 0x10;
1071 spin_unlock(&mvmsta
->lock
);
1073 /* Increase pending frames count if this isn't AMPDU or DQA queue */
1074 if (!iwl_mvm_is_dqa_supported(mvm
) && !is_ampdu
)
1075 atomic_inc(&mvm
->pending_frames
[mvmsta
->sta_id
]);
1080 iwl_trans_free_tx_cmd(mvm
->trans
, dev_cmd
);
1081 spin_unlock(&mvmsta
->lock
);
1086 int iwl_mvm_tx_skb(struct iwl_mvm
*mvm
, struct sk_buff
*skb
,
1087 struct ieee80211_sta
*sta
)
1089 struct iwl_mvm_sta
*mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
1090 struct ieee80211_tx_info info
;
1091 struct sk_buff_head mpdus_skbs
;
1092 unsigned int payload_len
;
1095 if (WARN_ON_ONCE(!mvmsta
))
1098 if (WARN_ON_ONCE(mvmsta
->sta_id
== IWL_MVM_INVALID_STA
))
1101 memcpy(&info
, skb
->cb
, sizeof(info
));
1103 if (!skb_is_gso(skb
))
1104 return iwl_mvm_tx_mpdu(mvm
, skb
, &info
, sta
);
1106 payload_len
= skb_tail_pointer(skb
) - skb_transport_header(skb
) -
1107 tcp_hdrlen(skb
) + skb
->data_len
;
1109 if (payload_len
<= skb_shinfo(skb
)->gso_size
)
1110 return iwl_mvm_tx_mpdu(mvm
, skb
, &info
, sta
);
1112 __skb_queue_head_init(&mpdus_skbs
);
1114 ret
= iwl_mvm_tx_tso(mvm
, skb
, &info
, sta
, &mpdus_skbs
);
1118 if (WARN_ON(skb_queue_empty(&mpdus_skbs
)))
1121 while (!skb_queue_empty(&mpdus_skbs
)) {
1122 skb
= __skb_dequeue(&mpdus_skbs
);
1124 ret
= iwl_mvm_tx_mpdu(mvm
, skb
, &info
, sta
);
1126 __skb_queue_purge(&mpdus_skbs
);
1134 static void iwl_mvm_check_ratid_empty(struct iwl_mvm
*mvm
,
1135 struct ieee80211_sta
*sta
, u8 tid
)
1137 struct iwl_mvm_sta
*mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
1138 struct iwl_mvm_tid_data
*tid_data
= &mvmsta
->tid_data
[tid
];
1139 struct ieee80211_vif
*vif
= mvmsta
->vif
;
1142 lockdep_assert_held(&mvmsta
->lock
);
1144 if ((tid_data
->state
== IWL_AGG_ON
||
1145 tid_data
->state
== IWL_EMPTYING_HW_QUEUE_DELBA
||
1146 iwl_mvm_is_dqa_supported(mvm
)) &&
1147 iwl_mvm_tid_queued(mvm
, tid_data
) == 0) {
1149 * Now that this aggregation or DQA queue is empty tell
1150 * mac80211 so it knows we no longer have frames buffered for
1151 * the station on this TID (for the TIM bitmap calculation.)
1153 ieee80211_sta_set_buffered(sta
, tid
, false);
1157 * In A000 HW, the next_reclaimed index is only 8 bit, so we'll need
1158 * to align the wrap around of ssn so we compare relevant values.
1160 normalized_ssn
= tid_data
->ssn
;
1161 if (mvm
->trans
->cfg
->gen2
)
1162 normalized_ssn
&= 0xff;
1164 if (normalized_ssn
!= tid_data
->next_reclaimed
)
1167 switch (tid_data
->state
) {
1168 case IWL_EMPTYING_HW_QUEUE_ADDBA
:
1169 IWL_DEBUG_TX_QUEUES(mvm
,
1170 "Can continue addBA flow ssn = next_recl = %d\n",
1171 tid_data
->next_reclaimed
);
1172 tid_data
->state
= IWL_AGG_STARTING
;
1173 ieee80211_start_tx_ba_cb_irqsafe(vif
, sta
->addr
, tid
);
1176 case IWL_EMPTYING_HW_QUEUE_DELBA
:
1177 IWL_DEBUG_TX_QUEUES(mvm
,
1178 "Can continue DELBA flow ssn = next_recl = %d\n",
1179 tid_data
->next_reclaimed
);
1180 if (!iwl_mvm_is_dqa_supported(mvm
)) {
1181 u8 mac80211_ac
= tid_to_mac80211_ac
[tid
];
1183 iwl_mvm_disable_txq(mvm
, tid_data
->txq_id
,
1184 vif
->hw_queue
[mac80211_ac
], tid
,
1187 tid_data
->state
= IWL_AGG_OFF
;
1188 ieee80211_stop_tx_ba_cb_irqsafe(vif
, sta
->addr
, tid
);
1196 #ifdef CONFIG_IWLWIFI_DEBUG
1197 const char *iwl_mvm_get_tx_fail_reason(u32 status
)
1199 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
1200 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
1202 switch (status
& TX_STATUS_MSK
) {
1203 case TX_STATUS_SUCCESS
:
1205 TX_STATUS_POSTPONE(DELAY
);
1206 TX_STATUS_POSTPONE(FEW_BYTES
);
1207 TX_STATUS_POSTPONE(BT_PRIO
);
1208 TX_STATUS_POSTPONE(QUIET_PERIOD
);
1209 TX_STATUS_POSTPONE(CALC_TTAK
);
1210 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY
);
1211 TX_STATUS_FAIL(SHORT_LIMIT
);
1212 TX_STATUS_FAIL(LONG_LIMIT
);
1213 TX_STATUS_FAIL(UNDERRUN
);
1214 TX_STATUS_FAIL(DRAIN_FLOW
);
1215 TX_STATUS_FAIL(RFKILL_FLUSH
);
1216 TX_STATUS_FAIL(LIFE_EXPIRE
);
1217 TX_STATUS_FAIL(DEST_PS
);
1218 TX_STATUS_FAIL(HOST_ABORTED
);
1219 TX_STATUS_FAIL(BT_RETRY
);
1220 TX_STATUS_FAIL(STA_INVALID
);
1221 TX_STATUS_FAIL(FRAG_DROPPED
);
1222 TX_STATUS_FAIL(TID_DISABLE
);
1223 TX_STATUS_FAIL(FIFO_FLUSHED
);
1224 TX_STATUS_FAIL(SMALL_CF_POLL
);
1225 TX_STATUS_FAIL(FW_DROP
);
1226 TX_STATUS_FAIL(STA_COLOR_MISMATCH
);
1231 #undef TX_STATUS_FAIL
1232 #undef TX_STATUS_POSTPONE
1234 #endif /* CONFIG_IWLWIFI_DEBUG */
1236 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags
,
1237 enum nl80211_band band
,
1238 struct ieee80211_tx_rate
*r
)
1240 if (rate_n_flags
& RATE_HT_MCS_GF_MSK
)
1241 r
->flags
|= IEEE80211_TX_RC_GREEN_FIELD
;
1242 switch (rate_n_flags
& RATE_MCS_CHAN_WIDTH_MSK
) {
1243 case RATE_MCS_CHAN_WIDTH_20
:
1245 case RATE_MCS_CHAN_WIDTH_40
:
1246 r
->flags
|= IEEE80211_TX_RC_40_MHZ_WIDTH
;
1248 case RATE_MCS_CHAN_WIDTH_80
:
1249 r
->flags
|= IEEE80211_TX_RC_80_MHZ_WIDTH
;
1251 case RATE_MCS_CHAN_WIDTH_160
:
1252 r
->flags
|= IEEE80211_TX_RC_160_MHZ_WIDTH
;
1255 if (rate_n_flags
& RATE_MCS_SGI_MSK
)
1256 r
->flags
|= IEEE80211_TX_RC_SHORT_GI
;
1257 if (rate_n_flags
& RATE_MCS_HT_MSK
) {
1258 r
->flags
|= IEEE80211_TX_RC_MCS
;
1259 r
->idx
= rate_n_flags
& RATE_HT_MCS_INDEX_MSK
;
1260 } else if (rate_n_flags
& RATE_MCS_VHT_MSK
) {
1261 ieee80211_rate_set_vht(
1262 r
, rate_n_flags
& RATE_VHT_MCS_RATE_CODE_MSK
,
1263 ((rate_n_flags
& RATE_VHT_MCS_NSS_MSK
) >>
1264 RATE_VHT_MCS_NSS_POS
) + 1);
1265 r
->flags
|= IEEE80211_TX_RC_VHT_MCS
;
1267 r
->idx
= iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags
,
1273 * translate ucode response to mac80211 tx status control values
1275 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags
,
1276 struct ieee80211_tx_info
*info
)
1278 struct ieee80211_tx_rate
*r
= &info
->status
.rates
[0];
1280 info
->status
.antenna
=
1281 ((rate_n_flags
& RATE_MCS_ANT_ABC_MSK
) >> RATE_MCS_ANT_POS
);
1282 iwl_mvm_hwrate_to_tx_rate(rate_n_flags
, info
->band
, r
);
1285 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm
*mvm
,
1288 struct iwl_fw_dbg_trigger_tlv
*trig
;
1289 struct iwl_fw_dbg_trigger_tx_status
*status_trig
;
1292 if (!iwl_fw_dbg_trigger_enabled(mvm
->fw
, FW_DBG_TRIGGER_TX_STATUS
))
1295 trig
= iwl_fw_dbg_get_trigger(mvm
->fw
, FW_DBG_TRIGGER_TX_STATUS
);
1296 status_trig
= (void *)trig
->data
;
1298 if (!iwl_fw_dbg_trigger_check_stop(mvm
, NULL
, trig
))
1301 for (i
= 0; i
< ARRAY_SIZE(status_trig
->statuses
); i
++) {
1302 /* don't collect on status 0 */
1303 if (!status_trig
->statuses
[i
].status
)
1306 if (status_trig
->statuses
[i
].status
!= (status
& TX_STATUS_MSK
))
1309 iwl_mvm_fw_dbg_collect_trig(mvm
, trig
,
1310 "Tx status %d was received",
1311 status
& TX_STATUS_MSK
);
1317 * iwl_mvm_get_scd_ssn - returns the SSN of the SCD
1318 * @tx_resp: the Tx response from the fw (agg or non-agg)
1320 * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since
1321 * it can't know that everything will go well until the end of the AMPDU, it
1322 * can't know in advance the number of MPDUs that will be sent in the current
1323 * batch. This is why it writes the agg Tx response while it fetches the MPDUs.
1324 * Hence, it can't know in advance what the SSN of the SCD will be at the end
1325 * of the batch. This is why the SSN of the SCD is written at the end of the
1326 * whole struct at a variable offset. This function knows how to cope with the
1327 * variable offset and returns the SSN of the SCD.
1329 static inline u32
iwl_mvm_get_scd_ssn(struct iwl_mvm
*mvm
,
1330 struct iwl_mvm_tx_resp
*tx_resp
)
1332 return le32_to_cpup((__le32
*)iwl_mvm_get_agg_status(mvm
, tx_resp
) +
1333 tx_resp
->frame_count
) & 0xfff;
1336 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm
*mvm
,
1337 struct iwl_rx_packet
*pkt
)
1339 struct ieee80211_sta
*sta
;
1340 u16 sequence
= le16_to_cpu(pkt
->hdr
.sequence
);
1341 int txq_id
= SEQ_TO_QUEUE(sequence
);
1342 /* struct iwl_mvm_tx_resp_v3 is almost the same */
1343 struct iwl_mvm_tx_resp
*tx_resp
= (void *)pkt
->data
;
1344 int sta_id
= IWL_MVM_TX_RES_GET_RA(tx_resp
->ra_tid
);
1345 int tid
= IWL_MVM_TX_RES_GET_TID(tx_resp
->ra_tid
);
1346 struct agg_tx_status
*agg_status
=
1347 iwl_mvm_get_agg_status(mvm
, tx_resp
);
1348 u32 status
= le16_to_cpu(agg_status
->status
);
1349 u16 ssn
= iwl_mvm_get_scd_ssn(mvm
, tx_resp
);
1350 struct iwl_mvm_sta
*mvmsta
;
1351 struct sk_buff_head skbs
;
1354 u16 next_reclaimed
, seq_ctl
;
1355 bool is_ndp
= false;
1357 __skb_queue_head_init(&skbs
);
1359 if (iwl_mvm_has_new_tx_api(mvm
))
1360 txq_id
= le16_to_cpu(tx_resp
->tx_queue
);
1362 seq_ctl
= le16_to_cpu(tx_resp
->seq_ctl
);
1364 /* we can free until ssn % q.n_bd not inclusive */
1365 iwl_trans_reclaim(mvm
->trans
, txq_id
, ssn
, &skbs
);
1367 while (!skb_queue_empty(&skbs
)) {
1368 struct sk_buff
*skb
= __skb_dequeue(&skbs
);
1369 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1373 iwl_trans_free_tx_cmd(mvm
->trans
, info
->driver_data
[1]);
1375 memset(&info
->status
, 0, sizeof(info
->status
));
1377 /* inform mac80211 about what happened with the frame */
1378 switch (status
& TX_STATUS_MSK
) {
1379 case TX_STATUS_SUCCESS
:
1380 case TX_STATUS_DIRECT_DONE
:
1381 info
->flags
|= IEEE80211_TX_STAT_ACK
;
1383 case TX_STATUS_FAIL_DEST_PS
:
1384 /* In DQA, the FW should have stopped the queue and not
1385 * return this status
1387 WARN_ON(iwl_mvm_is_dqa_supported(mvm
));
1388 info
->flags
|= IEEE80211_TX_STAT_TX_FILTERED
;
1394 iwl_mvm_tx_status_check_trigger(mvm
, status
);
1396 info
->status
.rates
[0].count
= tx_resp
->failure_frame
+ 1;
1397 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp
->initial_rate
),
1399 info
->status
.status_driver_data
[1] =
1400 (void *)(uintptr_t)le32_to_cpu(tx_resp
->initial_rate
);
1402 /* Single frame failure in an AMPDU queue => send BAR */
1403 if (info
->flags
& IEEE80211_TX_CTL_AMPDU
&&
1404 !(info
->flags
& IEEE80211_TX_STAT_ACK
) &&
1405 !(info
->flags
& IEEE80211_TX_STAT_TX_FILTERED
))
1406 info
->flags
|= IEEE80211_TX_STAT_AMPDU_NO_BACK
;
1407 info
->flags
&= ~IEEE80211_TX_CTL_AMPDU
;
1409 /* W/A FW bug: seq_ctl is wrong when the status isn't success */
1410 if (status
!= TX_STATUS_SUCCESS
) {
1411 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
1412 seq_ctl
= le16_to_cpu(hdr
->seq_ctrl
);
1415 if (unlikely(!seq_ctl
)) {
1416 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
1419 * If it is an NDP, we can't update next_reclaim since
1420 * its sequence control is 0. Note that for that same
1421 * reason, NDPs are never sent to A-MPDU'able queues
1422 * so that we can never have more than one freed frame
1423 * for a single Tx resonse (see WARN_ON below).
1425 if (ieee80211_is_qos_nullfunc(hdr
->frame_control
))
1430 * TODO: this is not accurate if we are freeing more than one
1433 info
->status
.tx_time
=
1434 le16_to_cpu(tx_resp
->wireless_media_time
);
1435 BUILD_BUG_ON(ARRAY_SIZE(info
->status
.status_driver_data
) < 1);
1436 lq_color
= TX_RES_RATE_TABLE_COL_GET(tx_resp
->tlc_info
);
1437 info
->status
.status_driver_data
[0] =
1438 RS_DRV_DATA_PACK(lq_color
, tx_resp
->reduced_tpc
);
1440 ieee80211_tx_status(mvm
->hw
, skb
);
1443 if (iwl_mvm_is_dqa_supported(mvm
) || txq_id
>= mvm
->first_agg_queue
) {
1444 /* If this is an aggregation queue, we use the ssn since:
1445 * ssn = wifi seq_num % 256.
1446 * The seq_ctl is the sequence control of the packet to which
1447 * this Tx response relates. But if there is a hole in the
1448 * bitmap of the BA we received, this Tx response may allow to
1449 * reclaim the hole and all the subsequent packets that were
1450 * already acked. In that case, seq_ctl != ssn, and the next
1451 * packet to be reclaimed will be ssn and not seq_ctl. In that
1452 * case, several packets will be reclaimed even if
1455 * The ssn is the index (% 256) of the latest packet that has
1456 * treated (acked / dropped) + 1.
1458 next_reclaimed
= ssn
;
1460 /* The next packet to be reclaimed is the one after this one */
1461 next_reclaimed
= IEEE80211_SEQ_TO_SN(seq_ctl
+ 0x10);
1464 IWL_DEBUG_TX_REPLY(mvm
,
1465 "TXQ %d status %s (0x%08x)\n",
1466 txq_id
, iwl_mvm_get_tx_fail_reason(status
), status
);
1468 IWL_DEBUG_TX_REPLY(mvm
,
1469 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
1470 le32_to_cpu(tx_resp
->initial_rate
),
1471 tx_resp
->failure_frame
, SEQ_TO_INDEX(sequence
),
1472 ssn
, next_reclaimed
, seq_ctl
);
1476 sta
= rcu_dereference(mvm
->fw_id_to_mac_id
[sta_id
]);
1478 * sta can't be NULL otherwise it'd mean that the sta has been freed in
1479 * the firmware while we still have packets for it in the Tx queues.
1481 if (WARN_ON_ONCE(!sta
))
1485 mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
1487 if (tid
!= IWL_TID_NON_QOS
&& tid
!= IWL_MGMT_TID
) {
1488 struct iwl_mvm_tid_data
*tid_data
=
1489 &mvmsta
->tid_data
[tid
];
1490 bool send_eosp_ndp
= false;
1492 spin_lock_bh(&mvmsta
->lock
);
1495 tid_data
->next_reclaimed
= next_reclaimed
;
1496 IWL_DEBUG_TX_REPLY(mvm
,
1497 "Next reclaimed packet:%d\n",
1500 IWL_DEBUG_TX_REPLY(mvm
,
1501 "NDP - don't update next_reclaimed\n");
1504 iwl_mvm_check_ratid_empty(mvm
, sta
, tid
);
1506 if (mvmsta
->sleep_tx_count
) {
1507 mvmsta
->sleep_tx_count
--;
1508 if (mvmsta
->sleep_tx_count
&&
1509 !iwl_mvm_tid_queued(mvm
, tid_data
)) {
1511 * The number of frames in the queue
1512 * dropped to 0 even if we sent less
1513 * frames than we thought we had on the
1515 * This means we had holes in the BA
1516 * window that we just filled, ask
1517 * mac80211 to send EOSP since the
1518 * firmware won't know how to do that.
1519 * Send NDP and the firmware will send
1520 * EOSP notification that will trigger
1521 * a call to ieee80211_sta_eosp().
1523 send_eosp_ndp
= true;
1527 spin_unlock_bh(&mvmsta
->lock
);
1528 if (send_eosp_ndp
) {
1529 iwl_mvm_sta_modify_sleep_tx_count(mvm
, sta
,
1530 IEEE80211_FRAME_RELEASE_UAPSD
,
1531 1, tid
, false, false);
1532 mvmsta
->sleep_tx_count
= 0;
1533 ieee80211_send_eosp_nullfunc(sta
, tid
);
1537 if (mvmsta
->next_status_eosp
) {
1538 mvmsta
->next_status_eosp
= false;
1539 ieee80211_sta_eosp(sta
);
1546 * If the txq is not an AMPDU queue, there is no chance we freed
1547 * several skbs. Check that out...
1549 if (iwl_mvm_is_dqa_supported(mvm
) || txq_id
>= mvm
->first_agg_queue
)
1552 /* We can't free more than one frame at once on a shared queue */
1553 WARN_ON(skb_freed
> 1);
1555 /* If we have still frames for this STA nothing to do here */
1556 if (!atomic_sub_and_test(skb_freed
, &mvm
->pending_frames
[sta_id
]))
1559 if (mvmsta
&& mvmsta
->vif
->type
== NL80211_IFTYPE_AP
) {
1562 * If there are no pending frames for this STA and
1563 * the tx to this station is not disabled, notify
1564 * mac80211 that this station can now wake up in its
1566 * If mvmsta is not NULL, sta is valid.
1569 spin_lock_bh(&mvmsta
->lock
);
1571 if (!mvmsta
->disable_tx
)
1572 ieee80211_sta_block_awake(mvm
->hw
, sta
, false);
1574 spin_unlock_bh(&mvmsta
->lock
);
1577 if (PTR_ERR(sta
) == -EBUSY
|| PTR_ERR(sta
) == -ENOENT
) {
1579 * We are draining and this was the last packet - pre_rcu_remove
1580 * has been called already. We might be after the
1581 * synchronize_net already.
1582 * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues.
1584 set_bit(sta_id
, mvm
->sta_drained
);
1585 schedule_work(&mvm
->sta_drained_wk
);
1592 #ifdef CONFIG_IWLWIFI_DEBUG
1593 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
1594 static const char *iwl_get_agg_tx_status(u16 status
)
1596 switch (status
& AGG_TX_STATE_STATUS_MSK
) {
1597 AGG_TX_STATE_(TRANSMITTED
);
1598 AGG_TX_STATE_(UNDERRUN
);
1599 AGG_TX_STATE_(BT_PRIO
);
1600 AGG_TX_STATE_(FEW_BYTES
);
1601 AGG_TX_STATE_(ABORT
);
1602 AGG_TX_STATE_(LAST_SENT_TTL
);
1603 AGG_TX_STATE_(LAST_SENT_TRY_CNT
);
1604 AGG_TX_STATE_(LAST_SENT_BT_KILL
);
1605 AGG_TX_STATE_(SCD_QUERY
);
1606 AGG_TX_STATE_(TEST_BAD_CRC32
);
1607 AGG_TX_STATE_(RESPONSE
);
1608 AGG_TX_STATE_(DUMP_TX
);
1609 AGG_TX_STATE_(DELAY_TX
);
1615 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm
*mvm
,
1616 struct iwl_rx_packet
*pkt
)
1618 struct iwl_mvm_tx_resp
*tx_resp
= (void *)pkt
->data
;
1619 struct agg_tx_status
*frame_status
=
1620 iwl_mvm_get_agg_status(mvm
, tx_resp
);
1623 for (i
= 0; i
< tx_resp
->frame_count
; i
++) {
1624 u16 fstatus
= le16_to_cpu(frame_status
[i
].status
);
1626 IWL_DEBUG_TX_REPLY(mvm
,
1627 "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
1628 iwl_get_agg_tx_status(fstatus
),
1629 fstatus
& AGG_TX_STATE_STATUS_MSK
,
1630 (fstatus
& AGG_TX_STATE_TRY_CNT_MSK
) >>
1631 AGG_TX_STATE_TRY_CNT_POS
,
1632 le16_to_cpu(frame_status
[i
].sequence
));
1636 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm
*mvm
,
1637 struct iwl_rx_packet
*pkt
)
1639 #endif /* CONFIG_IWLWIFI_DEBUG */
1641 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm
*mvm
,
1642 struct iwl_rx_packet
*pkt
)
1644 struct iwl_mvm_tx_resp
*tx_resp
= (void *)pkt
->data
;
1645 int sta_id
= IWL_MVM_TX_RES_GET_RA(tx_resp
->ra_tid
);
1646 int tid
= IWL_MVM_TX_RES_GET_TID(tx_resp
->ra_tid
);
1647 u16 sequence
= le16_to_cpu(pkt
->hdr
.sequence
);
1648 struct iwl_mvm_sta
*mvmsta
;
1649 int queue
= SEQ_TO_QUEUE(sequence
);
1651 if (WARN_ON_ONCE(queue
< mvm
->first_agg_queue
&&
1652 (!iwl_mvm_is_dqa_supported(mvm
) ||
1653 (queue
!= IWL_MVM_DQA_BSS_CLIENT_QUEUE
))))
1656 if (WARN_ON_ONCE(tid
== IWL_TID_NON_QOS
))
1659 iwl_mvm_rx_tx_cmd_agg_dbg(mvm
, pkt
);
1663 mvmsta
= iwl_mvm_sta_from_staid_rcu(mvm
, sta_id
);
1665 if (!WARN_ON_ONCE(!mvmsta
)) {
1666 mvmsta
->tid_data
[tid
].rate_n_flags
=
1667 le32_to_cpu(tx_resp
->initial_rate
);
1668 mvmsta
->tid_data
[tid
].tx_time
=
1669 le16_to_cpu(tx_resp
->wireless_media_time
);
1670 mvmsta
->tid_data
[tid
].lq_color
=
1671 (tx_resp
->tlc_info
& TX_RES_RATE_TABLE_COLOR_MSK
) >>
1672 TX_RES_RATE_TABLE_COLOR_POS
;
1678 void iwl_mvm_rx_tx_cmd(struct iwl_mvm
*mvm
, struct iwl_rx_cmd_buffer
*rxb
)
1680 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
1681 struct iwl_mvm_tx_resp
*tx_resp
= (void *)pkt
->data
;
1683 if (tx_resp
->frame_count
== 1)
1684 iwl_mvm_rx_tx_cmd_single(mvm
, pkt
);
1686 iwl_mvm_rx_tx_cmd_agg(mvm
, pkt
);
1689 static void iwl_mvm_tx_reclaim(struct iwl_mvm
*mvm
, int sta_id
, int tid
,
1691 struct ieee80211_tx_info
*ba_info
, u32 rate
)
1693 struct sk_buff_head reclaimed_skbs
;
1694 struct iwl_mvm_tid_data
*tid_data
;
1695 struct ieee80211_sta
*sta
;
1696 struct iwl_mvm_sta
*mvmsta
;
1697 struct sk_buff
*skb
;
1700 if (WARN_ONCE(sta_id
>= IWL_MVM_STATION_COUNT
||
1701 tid
>= IWL_MAX_TID_COUNT
,
1702 "sta_id %d tid %d", sta_id
, tid
))
1707 sta
= rcu_dereference(mvm
->fw_id_to_mac_id
[sta_id
]);
1709 /* Reclaiming frames for a station that has been deleted ? */
1710 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta
))) {
1715 mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
1716 tid_data
= &mvmsta
->tid_data
[tid
];
1718 if (tid_data
->txq_id
!= txq
) {
1720 "invalid BA notification: Q %d, tid %d\n",
1721 tid_data
->txq_id
, tid
);
1726 spin_lock_bh(&mvmsta
->lock
);
1728 __skb_queue_head_init(&reclaimed_skbs
);
1731 * Release all TFDs before the SSN, i.e. all TFDs in front of
1732 * block-ack window (we assume that they've been successfully
1733 * transmitted ... if not, it's too late anyway).
1735 iwl_trans_reclaim(mvm
->trans
, txq
, index
, &reclaimed_skbs
);
1737 tid_data
->next_reclaimed
= index
;
1739 iwl_mvm_check_ratid_empty(mvm
, sta
, tid
);
1743 /* pack lq color from tid_data along the reduced txp */
1744 ba_info
->status
.status_driver_data
[0] =
1745 RS_DRV_DATA_PACK(tid_data
->lq_color
,
1746 ba_info
->status
.status_driver_data
[0]);
1747 ba_info
->status
.status_driver_data
[1] = (void *)(uintptr_t)rate
;
1749 skb_queue_walk(&reclaimed_skbs
, skb
) {
1750 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
1751 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1753 if (ieee80211_is_data_qos(hdr
->frame_control
))
1758 iwl_trans_free_tx_cmd(mvm
->trans
, info
->driver_data
[1]);
1760 memset(&info
->status
, 0, sizeof(info
->status
));
1761 /* Packet was transmitted successfully, failures come as single
1762 * frames because before failing a frame the firmware transmits
1763 * it without aggregation at least once.
1765 info
->flags
|= IEEE80211_TX_STAT_ACK
;
1767 /* this is the first skb we deliver in this batch */
1768 /* put the rate scaling data there */
1770 info
->flags
|= IEEE80211_TX_STAT_AMPDU
;
1771 memcpy(&info
->status
, &ba_info
->status
,
1772 sizeof(ba_info
->status
));
1773 iwl_mvm_hwrate_to_tx_status(rate
, info
);
1777 spin_unlock_bh(&mvmsta
->lock
);
1779 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
1780 * possible (i.e. first MPDU in the aggregation wasn't acked)
1781 * Still it's important to update RS about sent vs. acked.
1783 if (skb_queue_empty(&reclaimed_skbs
)) {
1784 struct ieee80211_chanctx_conf
*chanctx_conf
= NULL
;
1788 rcu_dereference(mvmsta
->vif
->chanctx_conf
);
1790 if (WARN_ON_ONCE(!chanctx_conf
))
1793 ba_info
->band
= chanctx_conf
->def
.chan
->band
;
1794 iwl_mvm_hwrate_to_tx_status(rate
, ba_info
);
1796 IWL_DEBUG_TX_REPLY(mvm
, "No reclaim. Update rs directly\n");
1797 iwl_mvm_rs_tx_status(mvm
, sta
, tid
, ba_info
, false);
1803 while (!skb_queue_empty(&reclaimed_skbs
)) {
1804 skb
= __skb_dequeue(&reclaimed_skbs
);
1805 ieee80211_tx_status(mvm
->hw
, skb
);
1809 void iwl_mvm_rx_ba_notif(struct iwl_mvm
*mvm
, struct iwl_rx_cmd_buffer
*rxb
)
1811 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
1812 int sta_id
, tid
, txq
, index
;
1813 struct ieee80211_tx_info ba_info
= {};
1814 struct iwl_mvm_ba_notif
*ba_notif
;
1815 struct iwl_mvm_tid_data
*tid_data
;
1816 struct iwl_mvm_sta
*mvmsta
;
1818 if (iwl_mvm_has_new_tx_api(mvm
)) {
1819 struct iwl_mvm_compressed_ba_notif
*ba_res
=
1823 sta_id
= ba_res
->sta_id
;
1824 ba_info
.status
.ampdu_ack_len
= (u8
)le16_to_cpu(ba_res
->done
);
1825 ba_info
.status
.ampdu_len
= (u8
)le16_to_cpu(ba_res
->txed
);
1826 ba_info
.status
.tx_time
=
1827 (u16
)le32_to_cpu(ba_res
->wireless_time
);
1828 ba_info
.status
.status_driver_data
[0] =
1829 (void *)(uintptr_t)ba_res
->reduced_txp
;
1831 if (!le16_to_cpu(ba_res
->tfd_cnt
))
1835 for (i
= 0; i
< le16_to_cpu(ba_res
->tfd_cnt
); i
++) {
1836 struct iwl_mvm_compressed_ba_tfd
*ba_tfd
=
1839 iwl_mvm_tx_reclaim(mvm
, sta_id
, ba_tfd
->tid
,
1840 (int)(le16_to_cpu(ba_tfd
->q_num
)),
1841 le16_to_cpu(ba_tfd
->tfd_index
),
1843 le32_to_cpu(ba_res
->tx_rate
));
1847 IWL_DEBUG_TX_REPLY(mvm
,
1848 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n",
1849 sta_id
, le32_to_cpu(ba_res
->flags
),
1850 le16_to_cpu(ba_res
->txed
),
1851 le16_to_cpu(ba_res
->done
));
1855 ba_notif
= (void *)pkt
->data
;
1856 sta_id
= ba_notif
->sta_id
;
1857 tid
= ba_notif
->tid
;
1858 /* "flow" corresponds to Tx queue */
1859 txq
= le16_to_cpu(ba_notif
->scd_flow
);
1860 /* "ssn" is start of block-ack Tx window, corresponds to index
1861 * (in Tx queue's circular buffer) of first TFD/frame in window */
1862 index
= le16_to_cpu(ba_notif
->scd_ssn
);
1865 mvmsta
= iwl_mvm_sta_from_staid_rcu(mvm
, sta_id
);
1866 if (WARN_ON_ONCE(!mvmsta
)) {
1871 tid_data
= &mvmsta
->tid_data
[tid
];
1873 ba_info
.status
.ampdu_ack_len
= ba_notif
->txed_2_done
;
1874 ba_info
.status
.ampdu_len
= ba_notif
->txed
;
1875 ba_info
.status
.tx_time
= tid_data
->tx_time
;
1876 ba_info
.status
.status_driver_data
[0] =
1877 (void *)(uintptr_t)ba_notif
->reduced_txp
;
1881 iwl_mvm_tx_reclaim(mvm
, sta_id
, tid
, txq
, index
, &ba_info
,
1882 tid_data
->rate_n_flags
);
1884 IWL_DEBUG_TX_REPLY(mvm
,
1885 "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
1886 ba_notif
->sta_addr
, ba_notif
->sta_id
);
1888 IWL_DEBUG_TX_REPLY(mvm
,
1889 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1890 ba_notif
->tid
, le16_to_cpu(ba_notif
->seq_ctl
),
1891 le64_to_cpu(ba_notif
->bitmap
), txq
, index
,
1892 ba_notif
->txed
, ba_notif
->txed_2_done
);
1894 IWL_DEBUG_TX_REPLY(mvm
, "reduced txp from ba notif %d\n",
1895 ba_notif
->reduced_txp
);
1899 * Note that there are transports that buffer frames before they reach
1900 * the firmware. This means that after flush_tx_path is called, the
1901 * queue might not be empty. The race-free way to handle this is to:
1902 * 1) set the station as draining
1903 * 2) flush the Tx path
1904 * 3) wait for the transport queues to be empty
1906 int iwl_mvm_flush_tx_path(struct iwl_mvm
*mvm
, u32 tfd_msk
, u32 flags
)
1909 struct iwl_tx_path_flush_cmd_v1 flush_cmd
= {
1910 .queues_ctl
= cpu_to_le32(tfd_msk
),
1911 .flush_ctl
= cpu_to_le16(DUMP_TX_FIFO_FLUSH
),
1914 WARN_ON(iwl_mvm_has_new_tx_api(mvm
));
1916 ret
= iwl_mvm_send_cmd_pdu(mvm
, TXPATH_FLUSH
, flags
,
1917 sizeof(flush_cmd
), &flush_cmd
);
1919 IWL_ERR(mvm
, "Failed to send flush command (%d)\n", ret
);
1923 int iwl_mvm_flush_sta_tids(struct iwl_mvm
*mvm
, u32 sta_id
,
1924 u16 tids
, u32 flags
)
1927 struct iwl_tx_path_flush_cmd flush_cmd
= {
1928 .sta_id
= cpu_to_le32(sta_id
),
1929 .tid_mask
= cpu_to_le16(tids
),
1932 WARN_ON(!iwl_mvm_has_new_tx_api(mvm
));
1934 ret
= iwl_mvm_send_cmd_pdu(mvm
, TXPATH_FLUSH
, flags
,
1935 sizeof(flush_cmd
), &flush_cmd
);
1937 IWL_ERR(mvm
, "Failed to send flush command (%d)\n", ret
);
1941 int iwl_mvm_flush_sta(struct iwl_mvm
*mvm
, void *sta
, bool internal
, u32 flags
)
1943 struct iwl_mvm_int_sta
*int_sta
= sta
;
1944 struct iwl_mvm_sta
*mvm_sta
= sta
;
1946 if (iwl_mvm_has_new_tx_api(mvm
)) {
1948 return iwl_mvm_flush_sta_tids(mvm
, int_sta
->sta_id
,
1949 BIT(IWL_MGMT_TID
), flags
);
1951 return iwl_mvm_flush_sta_tids(mvm
, mvm_sta
->sta_id
,
1956 return iwl_mvm_flush_tx_path(mvm
, int_sta
->tfd_queue_msk
,
1959 return iwl_mvm_flush_tx_path(mvm
, mvm_sta
->tfd_queue_msk
, flags
);