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 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 * All rights reserved.
39 * Redistribution and use in source and binary forms, with or without
40 * modification, are permitted provided that the following conditions
43 * * Redistributions of source code must retain the above copyright
44 * notice, this list of conditions and the following disclaimer.
45 * * Redistributions in binary form must reproduce the above copyright
46 * notice, this list of conditions and the following disclaimer in
47 * the documentation and/or other materials provided with the
49 * * Neither the name Intel Corporation nor the names of its
50 * contributors may be used to endorse or promote products derived
51 * from this software without specific prior written permission.
53 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
54 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
55 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
56 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
57 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
58 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
59 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
60 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
61 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
62 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
63 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
65 *****************************************************************************/
66 #include <linux/ieee80211.h>
67 #include <linux/etherdevice.h>
68 #include <linux/tcp.h>
71 #include "iwl-trans.h"
72 #include "iwl-eeprom-parse.h"
78 iwl_mvm_bar_check_trigger(struct iwl_mvm
*mvm
, const u8
*addr
,
81 struct iwl_fw_dbg_trigger_tlv
*trig
;
82 struct iwl_fw_dbg_trigger_ba
*ba_trig
;
84 if (!iwl_fw_dbg_trigger_enabled(mvm
->fw
, FW_DBG_TRIGGER_BA
))
87 trig
= iwl_fw_dbg_get_trigger(mvm
->fw
, FW_DBG_TRIGGER_BA
);
88 ba_trig
= (void *)trig
->data
;
90 if (!iwl_fw_dbg_trigger_check_stop(mvm
, NULL
, trig
))
93 if (!(le16_to_cpu(ba_trig
->tx_bar
) & BIT(tid
)))
96 iwl_mvm_fw_dbg_collect_trig(mvm
, trig
,
97 "BAR sent to %pM, tid %d, ssn %d",
102 * Sets most of the Tx cmd's fields
104 void iwl_mvm_set_tx_cmd(struct iwl_mvm
*mvm
, struct sk_buff
*skb
,
105 struct iwl_tx_cmd
*tx_cmd
,
106 struct ieee80211_tx_info
*info
, u8 sta_id
)
108 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
109 __le16 fc
= hdr
->frame_control
;
110 u32 tx_flags
= le32_to_cpu(tx_cmd
->tx_flags
);
111 u32 len
= skb
->len
+ FCS_LEN
;
114 if (!(info
->flags
& IEEE80211_TX_CTL_NO_ACK
))
115 tx_flags
|= TX_CMD_FLG_ACK
;
117 tx_flags
&= ~TX_CMD_FLG_ACK
;
119 if (ieee80211_is_probe_resp(fc
))
120 tx_flags
|= TX_CMD_FLG_TSF
;
122 if (ieee80211_has_morefrags(fc
))
123 tx_flags
|= TX_CMD_FLG_MORE_FRAG
;
125 if (ieee80211_is_data_qos(fc
)) {
126 u8
*qc
= ieee80211_get_qos_ctl(hdr
);
127 tx_cmd
->tid_tspec
= qc
[0] & 0xf;
128 tx_flags
&= ~TX_CMD_FLG_SEQ_CTL
;
129 if (*qc
& IEEE80211_QOS_CTL_A_MSDU_PRESENT
)
130 tx_cmd
->offload_assist
|=
131 cpu_to_le16(BIT(TX_CMD_OFFLD_AMSDU
));
132 } else if (ieee80211_is_back_req(fc
)) {
133 struct ieee80211_bar
*bar
= (void *)skb
->data
;
134 u16 control
= le16_to_cpu(bar
->control
);
135 u16 ssn
= le16_to_cpu(bar
->start_seq_num
);
137 tx_flags
|= TX_CMD_FLG_ACK
| TX_CMD_FLG_BAR
;
138 tx_cmd
->tid_tspec
= (control
&
139 IEEE80211_BAR_CTRL_TID_INFO_MASK
) >>
140 IEEE80211_BAR_CTRL_TID_INFO_SHIFT
;
141 WARN_ON_ONCE(tx_cmd
->tid_tspec
>= IWL_MAX_TID_COUNT
);
142 iwl_mvm_bar_check_trigger(mvm
, bar
->ra
, tx_cmd
->tid_tspec
,
145 tx_cmd
->tid_tspec
= IWL_TID_NON_QOS
;
146 if (info
->flags
& IEEE80211_TX_CTL_ASSIGN_SEQ
)
147 tx_flags
|= TX_CMD_FLG_SEQ_CTL
;
149 tx_flags
&= ~TX_CMD_FLG_SEQ_CTL
;
152 /* Default to 0 (BE) when tid_spec is set to IWL_TID_NON_QOS */
153 if (tx_cmd
->tid_tspec
< IWL_MAX_TID_COUNT
)
154 ac
= tid_to_mac80211_ac
[tx_cmd
->tid_tspec
];
156 ac
= tid_to_mac80211_ac
[0];
158 tx_flags
|= iwl_mvm_bt_coex_tx_prio(mvm
, hdr
, info
, ac
) <<
159 TX_CMD_FLG_BT_PRIO_POS
;
161 if (ieee80211_is_mgmt(fc
)) {
162 if (ieee80211_is_assoc_req(fc
) || ieee80211_is_reassoc_req(fc
))
163 tx_cmd
->pm_frame_timeout
= cpu_to_le16(PM_FRAME_ASSOC
);
164 else if (ieee80211_is_action(fc
))
165 tx_cmd
->pm_frame_timeout
= cpu_to_le16(PM_FRAME_NONE
);
167 tx_cmd
->pm_frame_timeout
= cpu_to_le16(PM_FRAME_MGMT
);
169 /* The spec allows Action frames in A-MPDU, we don't support
172 WARN_ON_ONCE(info
->flags
& IEEE80211_TX_CTL_AMPDU
);
173 } else if (info
->control
.flags
& IEEE80211_TX_CTRL_PORT_CTRL_PROTO
) {
174 tx_cmd
->pm_frame_timeout
= cpu_to_le16(PM_FRAME_MGMT
);
176 tx_cmd
->pm_frame_timeout
= cpu_to_le16(PM_FRAME_NONE
);
179 if (ieee80211_is_data(fc
) && len
> mvm
->rts_threshold
&&
180 !is_multicast_ether_addr(ieee80211_get_DA(hdr
)))
181 tx_flags
|= TX_CMD_FLG_PROT_REQUIRE
;
183 if (fw_has_capa(&mvm
->fw
->ucode_capa
,
184 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT
) &&
185 ieee80211_action_contains_tpc(skb
))
186 tx_flags
|= TX_CMD_FLG_WRITE_TX_POWER
;
188 tx_cmd
->tx_flags
= cpu_to_le32(tx_flags
);
189 /* Total # bytes to be transmitted */
190 tx_cmd
->len
= cpu_to_le16((u16
)skb
->len
+
191 (uintptr_t)info
->driver_data
[0]);
192 tx_cmd
->life_time
= cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE
);
193 tx_cmd
->sta_id
= sta_id
;
195 /* padding is inserted later in transport */
196 if (ieee80211_hdrlen(fc
) % 4 &&
197 !(tx_cmd
->offload_assist
& cpu_to_le16(BIT(TX_CMD_OFFLD_AMSDU
))))
198 tx_cmd
->offload_assist
|= cpu_to_le16(BIT(TX_CMD_OFFLD_PAD
));
202 * Sets the fields in the Tx cmd that are rate related
204 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm
*mvm
, struct iwl_tx_cmd
*tx_cmd
,
205 struct ieee80211_tx_info
*info
,
206 struct ieee80211_sta
*sta
, __le16 fc
)
212 /* Set retry limit on RTS packets */
213 tx_cmd
->rts_retry_limit
= IWL_RTS_DFAULT_RETRY_LIMIT
;
215 /* Set retry limit on DATA packets and Probe Responses*/
216 if (ieee80211_is_probe_resp(fc
)) {
217 tx_cmd
->data_retry_limit
= IWL_MGMT_DFAULT_RETRY_LIMIT
;
218 tx_cmd
->rts_retry_limit
=
219 min(tx_cmd
->data_retry_limit
, tx_cmd
->rts_retry_limit
);
220 } else if (ieee80211_is_back_req(fc
)) {
221 tx_cmd
->data_retry_limit
= IWL_BAR_DFAULT_RETRY_LIMIT
;
223 tx_cmd
->data_retry_limit
= IWL_DEFAULT_TX_RETRY
;
227 * for data packets, rate info comes from the table inside the fw. This
228 * table is controlled by LINK_QUALITY commands
231 if (ieee80211_is_data(fc
) && sta
) {
232 tx_cmd
->initial_rate_index
= 0;
233 tx_cmd
->tx_flags
|= cpu_to_le32(TX_CMD_FLG_STA_RATE
);
235 } else if (ieee80211_is_back_req(fc
)) {
237 cpu_to_le32(TX_CMD_FLG_ACK
| TX_CMD_FLG_BAR
);
240 /* HT rate doesn't make sense for a non data frame */
241 WARN_ONCE(info
->control
.rates
[0].flags
& IEEE80211_TX_RC_MCS
,
242 "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame (fc:0x%x)\n",
243 info
->control
.rates
[0].flags
,
244 info
->control
.rates
[0].idx
,
247 rate_idx
= info
->control
.rates
[0].idx
;
248 /* if the rate isn't a well known legacy rate, take the lowest one */
249 if (rate_idx
< 0 || rate_idx
> IWL_RATE_COUNT_LEGACY
)
250 rate_idx
= rate_lowest_index(
251 &mvm
->nvm_data
->bands
[info
->band
], sta
);
253 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
254 if (info
->band
== IEEE80211_BAND_5GHZ
)
255 rate_idx
+= IWL_FIRST_OFDM_RATE
;
257 /* For 2.4 GHZ band, check that there is no need to remap */
258 BUILD_BUG_ON(IWL_FIRST_CCK_RATE
!= 0);
260 /* Get PLCP rate for tx_cmd->rate_n_flags */
261 rate_plcp
= iwl_mvm_mac80211_idx_to_hwrate(rate_idx
);
263 mvm
->mgmt_last_antenna_idx
=
264 iwl_mvm_next_antenna(mvm
, iwl_mvm_get_valid_tx_ant(mvm
),
265 mvm
->mgmt_last_antenna_idx
);
267 if (info
->band
== IEEE80211_BAND_2GHZ
&&
268 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm
))
269 rate_flags
= mvm
->cfg
->non_shared_ant
<< RATE_MCS_ANT_POS
;
272 BIT(mvm
->mgmt_last_antenna_idx
) << RATE_MCS_ANT_POS
;
274 /* Set CCK flag as needed */
275 if ((rate_idx
>= IWL_FIRST_CCK_RATE
) && (rate_idx
<= IWL_LAST_CCK_RATE
))
276 rate_flags
|= RATE_MCS_CCK_MSK
;
278 /* Set the rate in the TX cmd */
279 tx_cmd
->rate_n_flags
= cpu_to_le32((u32
)rate_plcp
| rate_flags
);
283 * Sets the fields in the Tx cmd that are crypto related
285 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm
*mvm
,
286 struct ieee80211_tx_info
*info
,
287 struct iwl_tx_cmd
*tx_cmd
,
288 struct sk_buff
*skb_frag
,
291 struct ieee80211_key_conf
*keyconf
= info
->control
.hw_key
;
292 u8
*crypto_hdr
= skb_frag
->data
+ hdrlen
;
295 switch (keyconf
->cipher
) {
296 case WLAN_CIPHER_SUITE_CCMP
:
297 case WLAN_CIPHER_SUITE_CCMP_256
:
298 iwl_mvm_set_tx_cmd_ccmp(info
, tx_cmd
);
299 pn
= atomic64_inc_return(&keyconf
->tx_pn
);
302 crypto_hdr
[3] = 0x20 | (keyconf
->keyidx
<< 6);
303 crypto_hdr
[1] = pn
>> 8;
304 crypto_hdr
[4] = pn
>> 16;
305 crypto_hdr
[5] = pn
>> 24;
306 crypto_hdr
[6] = pn
>> 32;
307 crypto_hdr
[7] = pn
>> 40;
310 case WLAN_CIPHER_SUITE_TKIP
:
311 tx_cmd
->sec_ctl
= TX_CMD_SEC_TKIP
;
312 pn
= atomic64_inc_return(&keyconf
->tx_pn
);
313 ieee80211_tkip_add_iv(crypto_hdr
, keyconf
, pn
);
314 ieee80211_get_tkip_p2k(keyconf
, skb_frag
, tx_cmd
->key
);
317 case WLAN_CIPHER_SUITE_WEP104
:
318 tx_cmd
->sec_ctl
|= TX_CMD_SEC_KEY128
;
320 case WLAN_CIPHER_SUITE_WEP40
:
321 tx_cmd
->sec_ctl
|= TX_CMD_SEC_WEP
|
322 ((keyconf
->keyidx
<< TX_CMD_SEC_WEP_KEY_IDX_POS
) &
323 TX_CMD_SEC_WEP_KEY_IDX_MSK
);
325 memcpy(&tx_cmd
->key
[3], keyconf
->key
, keyconf
->keylen
);
328 tx_cmd
->sec_ctl
|= TX_CMD_SEC_EXT
;
333 * Allocates and sets the Tx cmd the driver data pointers in the skb
335 static struct iwl_device_cmd
*
336 iwl_mvm_set_tx_params(struct iwl_mvm
*mvm
, struct sk_buff
*skb
,
337 int hdrlen
, struct ieee80211_sta
*sta
, u8 sta_id
)
339 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
340 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
341 struct iwl_device_cmd
*dev_cmd
;
342 struct iwl_tx_cmd
*tx_cmd
;
344 dev_cmd
= iwl_trans_alloc_tx_cmd(mvm
->trans
);
346 if (unlikely(!dev_cmd
))
349 memset(dev_cmd
, 0, sizeof(*dev_cmd
));
350 dev_cmd
->hdr
.cmd
= TX_CMD
;
351 tx_cmd
= (struct iwl_tx_cmd
*)dev_cmd
->payload
;
353 if (info
->control
.hw_key
)
354 iwl_mvm_set_tx_cmd_crypto(mvm
, info
, tx_cmd
, skb
, hdrlen
);
356 iwl_mvm_set_tx_cmd(mvm
, skb
, tx_cmd
, info
, sta_id
);
358 iwl_mvm_set_tx_cmd_rate(mvm
, tx_cmd
, info
, sta
, hdr
->frame_control
);
360 memset(&info
->status
, 0, sizeof(info
->status
));
361 memset(info
->driver_data
, 0, sizeof(info
->driver_data
));
363 info
->driver_data
[1] = dev_cmd
;
368 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm
*mvm
, struct sk_buff
*skb
)
370 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
371 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
372 struct iwl_device_cmd
*dev_cmd
;
373 struct iwl_tx_cmd
*tx_cmd
;
375 int hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
377 if (WARN_ON_ONCE(info
->flags
& IEEE80211_TX_CTL_AMPDU
))
380 if (WARN_ON_ONCE(info
->flags
& IEEE80211_TX_CTL_SEND_AFTER_DTIM
&&
381 (!info
->control
.vif
||
382 info
->hw_queue
!= info
->control
.vif
->cab_queue
)))
385 /* This holds the amsdu headers length */
386 info
->driver_data
[0] = (void *)(uintptr_t)0;
389 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used
390 * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel
391 * queue. STATION (HS2.0) uses the auxiliary context of the FW,
392 * and hence needs to be sent on the aux queue
394 if (IEEE80211_SKB_CB(skb
)->hw_queue
== IWL_MVM_OFFCHANNEL_QUEUE
&&
395 info
->control
.vif
->type
== NL80211_IFTYPE_STATION
)
396 IEEE80211_SKB_CB(skb
)->hw_queue
= mvm
->aux_queue
;
399 * If the interface on which the frame is sent is the P2P_DEVICE
400 * or an AP/GO interface use the broadcast station associated
401 * with it; otherwise if the interface is a managed interface
402 * use the AP station associated with it for multicast traffic
403 * (this is not possible for unicast packets as a TLDS discovery
404 * response are sent without a station entry); otherwise use the
407 sta_id
= mvm
->aux_sta
.sta_id
;
408 if (info
->control
.vif
) {
409 struct iwl_mvm_vif
*mvmvif
=
410 iwl_mvm_vif_from_mac80211(info
->control
.vif
);
412 if (info
->control
.vif
->type
== NL80211_IFTYPE_P2P_DEVICE
||
413 info
->control
.vif
->type
== NL80211_IFTYPE_AP
)
414 sta_id
= mvmvif
->bcast_sta
.sta_id
;
415 else if (info
->control
.vif
->type
== NL80211_IFTYPE_STATION
&&
416 is_multicast_ether_addr(hdr
->addr1
)) {
417 u8 ap_sta_id
= ACCESS_ONCE(mvmvif
->ap_sta_id
);
419 if (ap_sta_id
!= IWL_MVM_STATION_COUNT
)
424 IWL_DEBUG_TX(mvm
, "station Id %d, queue=%d\n", sta_id
, info
->hw_queue
);
426 dev_cmd
= iwl_mvm_set_tx_params(mvm
, skb
, hdrlen
, NULL
, sta_id
);
430 /* From now on, we cannot access info->control */
431 tx_cmd
= (struct iwl_tx_cmd
*)dev_cmd
->payload
;
433 /* Copy MAC header from skb into command buffer */
434 memcpy(tx_cmd
->hdr
, hdr
, hdrlen
);
436 if (iwl_trans_tx(mvm
->trans
, skb
, dev_cmd
, info
->hw_queue
)) {
437 iwl_trans_free_tx_cmd(mvm
->trans
, dev_cmd
);
442 * Increase the pending frames counter, so that later when a reply comes
443 * in and the counter is decreased - we don't start getting negative
445 * Note that we don't need to make sure it isn't agg'd, since we're
448 atomic_inc(&mvm
->pending_frames
[sta_id
]);
454 static int iwl_mvm_tx_tso(struct iwl_mvm
*mvm
, struct sk_buff
*skb
,
455 struct ieee80211_sta
*sta
,
456 struct sk_buff_head
*mpdus_skb
)
458 struct iwl_mvm_sta
*mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
459 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
460 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
461 unsigned int mss
= skb_shinfo(skb
)->gso_size
;
462 struct sk_buff
*tmp
, *next
;
463 char cb
[sizeof(skb
->cb
)];
464 unsigned int num_subframes
, tcp_payload_len
, subf_len
, max_amsdu_len
;
465 bool ipv4
= (skb
->protocol
== htons(ETH_P_IP
));
466 u16 ip_base_id
= ipv4
? ntohs(ip_hdr(skb
)->id
) : 0;
467 u16 amsdu_add
, snap_ip_tcp
, pad
, i
= 0;
468 unsigned int dbg_max_amsdu_len
;
471 snap_ip_tcp
= 8 + skb_transport_header(skb
) - skb_network_header(skb
) +
474 qc
= ieee80211_get_qos_ctl(hdr
);
475 tid
= *qc
& IEEE80211_QOS_CTL_TID_MASK
;
476 if (WARN_ON_ONCE(tid
>= IWL_MAX_TID_COUNT
))
479 if (!sta
->max_amsdu_len
||
480 !ieee80211_is_data_qos(hdr
->frame_control
) ||
481 !mvmsta
->tlc_amsdu
) {
488 * No need to lock amsdu_in_ampdu_allowed since it can't be modified
489 * during an BA session.
491 if (info
->flags
& IEEE80211_TX_CTL_AMPDU
&&
492 !mvmsta
->tid_data
[tid
].amsdu_in_ampdu_allowed
) {
498 max_amsdu_len
= sta
->max_amsdu_len
;
499 dbg_max_amsdu_len
= ACCESS_ONCE(mvm
->max_amsdu_len
);
501 /* the Tx FIFO to which this A-MSDU will be routed */
502 txf
= iwl_mvm_ac_to_tx_fifo
[tid_to_mac80211_ac
[tid
]];
505 * Don't send an AMSDU that will be longer than the TXF.
506 * Add a security margin of 256 for the TX command + headers.
507 * We also want to have the start of the next packet inside the
508 * fifo to be able to send bursts.
510 max_amsdu_len
= min_t(unsigned int, max_amsdu_len
,
511 mvm
->shared_mem_cfg
.txfifo_size
[txf
] - 256);
513 if (dbg_max_amsdu_len
)
514 max_amsdu_len
= min_t(unsigned int, max_amsdu_len
,
518 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not
519 * supported. This is a spec requirement (IEEE 802.11-2015
520 * section 8.7.3 NOTE 3).
522 if (info
->flags
& IEEE80211_TX_CTL_AMPDU
&&
523 !sta
->vht_cap
.vht_supported
)
524 max_amsdu_len
= min_t(unsigned int, max_amsdu_len
, 4095);
526 /* Sub frame header + SNAP + IP header + TCP header + MSS */
527 subf_len
= sizeof(struct ethhdr
) + snap_ip_tcp
+ mss
;
528 pad
= (4 - subf_len
) & 0x3;
531 * If we have N subframes in the A-MSDU, then the A-MSDU's size is
532 * N * subf_len + (N - 1) * pad.
534 num_subframes
= (max_amsdu_len
+ pad
) / (subf_len
+ pad
);
535 if (num_subframes
> 1)
536 *qc
|= IEEE80211_QOS_CTL_A_MSDU_PRESENT
;
538 tcp_payload_len
= skb_tail_pointer(skb
) - skb_transport_header(skb
) -
539 tcp_hdrlen(skb
) + skb
->data_len
;
542 * Make sure we have enough TBs for the A-MSDU:
543 * 2 for each subframe
544 * 1 more for each fragment
545 * 1 more for the potential data in the header
548 min_t(unsigned int, num_subframes
,
549 (mvm
->trans
->max_skb_frags
- 1 -
550 skb_shinfo(skb
)->nr_frags
) / 2);
552 /* This skb fits in one single A-MSDU */
553 if (num_subframes
* mss
>= tcp_payload_len
) {
555 * Compute the length of all the data added for the A-MSDU.
556 * This will be used to compute the length to write in the TX
557 * command. We have: SNAP + IP + TCP for n -1 subframes and
558 * ETH header for n subframes. Note that the original skb
559 * already had one set of SNAP / IP / TCP headers.
561 num_subframes
= DIV_ROUND_UP(tcp_payload_len
, mss
);
562 info
= IEEE80211_SKB_CB(skb
);
563 amsdu_add
= num_subframes
* sizeof(struct ethhdr
) +
564 (num_subframes
- 1) * (snap_ip_tcp
+ pad
);
565 /* This holds the amsdu headers length */
566 info
->driver_data
[0] = (void *)(uintptr_t)amsdu_add
;
568 __skb_queue_tail(mpdus_skb
, skb
);
573 * Trick the segmentation function to make it
574 * create SKBs that can fit into one A-MSDU.
577 skb_shinfo(skb
)->gso_size
= num_subframes
* mss
;
578 memcpy(cb
, skb
->cb
, sizeof(cb
));
580 next
= skb_gso_segment(skb
, NETIF_F_CSUM_MASK
| NETIF_F_SG
);
581 skb_shinfo(skb
)->gso_size
= mss
;
582 if (WARN_ON_ONCE(IS_ERR(next
)))
591 memcpy(tmp
->cb
, cb
, sizeof(tmp
->cb
));
593 * Compute the length of all the data added for the A-MSDU.
594 * This will be used to compute the length to write in the TX
595 * command. We have: SNAP + IP + TCP for n -1 subframes and
596 * ETH header for n subframes.
598 tcp_payload_len
= skb_tail_pointer(tmp
) -
599 skb_transport_header(tmp
) -
600 tcp_hdrlen(tmp
) + tmp
->data_len
;
603 ip_hdr(tmp
)->id
= htons(ip_base_id
+ i
* num_subframes
);
605 if (tcp_payload_len
> mss
) {
606 num_subframes
= DIV_ROUND_UP(tcp_payload_len
, mss
);
607 info
= IEEE80211_SKB_CB(tmp
);
608 amsdu_add
= num_subframes
* sizeof(struct ethhdr
) +
609 (num_subframes
- 1) * (snap_ip_tcp
+ pad
);
610 info
->driver_data
[0] = (void *)(uintptr_t)amsdu_add
;
611 skb_shinfo(tmp
)->gso_size
= mss
;
613 qc
= ieee80211_get_qos_ctl((void *)tmp
->data
);
616 ip_send_check(ip_hdr(tmp
));
617 *qc
&= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT
;
618 skb_shinfo(tmp
)->gso_size
= 0;
624 __skb_queue_tail(mpdus_skb
, tmp
);
630 #else /* CONFIG_INET */
631 static int iwl_mvm_tx_tso(struct iwl_mvm
*mvm
, struct sk_buff
*skb
,
632 struct ieee80211_sta
*sta
,
633 struct sk_buff_head
*mpdus_skb
)
635 /* Impossible to get TSO with CONFIG_INET */
643 * Sets the fields in the Tx cmd that are crypto related
645 static int iwl_mvm_tx_mpdu(struct iwl_mvm
*mvm
, struct sk_buff
*skb
,
646 struct ieee80211_sta
*sta
)
648 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
649 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
650 struct iwl_mvm_sta
*mvmsta
;
651 struct iwl_device_cmd
*dev_cmd
;
652 struct iwl_tx_cmd
*tx_cmd
;
655 u8 tid
= IWL_MAX_TID_COUNT
;
656 u8 txq_id
= info
->hw_queue
;
657 bool is_data_qos
= false, is_ampdu
= false;
660 mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
661 fc
= hdr
->frame_control
;
662 hdrlen
= ieee80211_hdrlen(fc
);
664 if (WARN_ON_ONCE(!mvmsta
))
667 if (WARN_ON_ONCE(mvmsta
->sta_id
== IWL_MVM_STATION_COUNT
))
670 dev_cmd
= iwl_mvm_set_tx_params(mvm
, skb
, hdrlen
, sta
, mvmsta
->sta_id
);
674 tx_cmd
= (struct iwl_tx_cmd
*)dev_cmd
->payload
;
675 /* From now on, we cannot access info->control */
678 * we handle that entirely ourselves -- for uAPSD the firmware
679 * will always send a notification, and for PS-Poll responses
680 * we'll notify mac80211 when getting frame status
682 info
->flags
&= ~IEEE80211_TX_STATUS_EOSP
;
684 spin_lock(&mvmsta
->lock
);
686 if (ieee80211_is_data_qos(fc
) && !ieee80211_is_qos_nullfunc(fc
)) {
688 qc
= ieee80211_get_qos_ctl(hdr
);
689 tid
= qc
[0] & IEEE80211_QOS_CTL_TID_MASK
;
690 if (WARN_ON_ONCE(tid
>= IWL_MAX_TID_COUNT
))
691 goto drop_unlock_sta
;
693 seq_number
= mvmsta
->tid_data
[tid
].seq_number
;
694 seq_number
&= IEEE80211_SCTL_SEQ
;
695 hdr
->seq_ctrl
&= cpu_to_le16(IEEE80211_SCTL_FRAG
);
696 hdr
->seq_ctrl
|= cpu_to_le16(seq_number
);
698 is_ampdu
= info
->flags
& IEEE80211_TX_CTL_AMPDU
;
701 /* Copy MAC header from skb into command buffer */
702 memcpy(tx_cmd
->hdr
, hdr
, hdrlen
);
704 WARN_ON_ONCE(info
->flags
& IEEE80211_TX_CTL_SEND_AFTER_DTIM
);
707 /* default to TID 0 for non-QoS packets */
708 u8 tdls_tid
= tid
== IWL_MAX_TID_COUNT
? 0 : tid
;
710 txq_id
= mvmsta
->hw_queue
[tid_to_mac80211_ac
[tdls_tid
]];
714 if (WARN_ON_ONCE(mvmsta
->tid_data
[tid
].state
!= IWL_AGG_ON
))
715 goto drop_unlock_sta
;
716 txq_id
= mvmsta
->tid_data
[tid
].txq_id
;
719 IWL_DEBUG_TX(mvm
, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta
->sta_id
,
720 tid
, txq_id
, IEEE80211_SEQ_TO_SN(seq_number
));
722 if (iwl_trans_tx(mvm
->trans
, skb
, dev_cmd
, txq_id
))
723 goto drop_unlock_sta
;
725 if (is_data_qos
&& !ieee80211_has_morefrags(fc
))
726 mvmsta
->tid_data
[tid
].seq_number
= seq_number
+ 0x10;
728 spin_unlock(&mvmsta
->lock
);
730 if (txq_id
< mvm
->first_agg_queue
)
731 atomic_inc(&mvm
->pending_frames
[mvmsta
->sta_id
]);
736 iwl_trans_free_tx_cmd(mvm
->trans
, dev_cmd
);
737 spin_unlock(&mvmsta
->lock
);
742 int iwl_mvm_tx_skb(struct iwl_mvm
*mvm
, struct sk_buff
*skb
,
743 struct ieee80211_sta
*sta
)
745 struct iwl_mvm_sta
*mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
746 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
747 struct sk_buff_head mpdus_skbs
;
748 unsigned int payload_len
;
751 if (WARN_ON_ONCE(!mvmsta
))
754 if (WARN_ON_ONCE(mvmsta
->sta_id
== IWL_MVM_STATION_COUNT
))
757 /* This holds the amsdu headers length */
758 info
->driver_data
[0] = (void *)(uintptr_t)0;
760 if (!skb_is_gso(skb
))
761 return iwl_mvm_tx_mpdu(mvm
, skb
, sta
);
763 payload_len
= skb_tail_pointer(skb
) - skb_transport_header(skb
) -
764 tcp_hdrlen(skb
) + skb
->data_len
;
766 if (payload_len
<= skb_shinfo(skb
)->gso_size
)
767 return iwl_mvm_tx_mpdu(mvm
, skb
, sta
);
769 __skb_queue_head_init(&mpdus_skbs
);
771 ret
= iwl_mvm_tx_tso(mvm
, skb
, sta
, &mpdus_skbs
);
775 if (WARN_ON(skb_queue_empty(&mpdus_skbs
)))
778 while (!skb_queue_empty(&mpdus_skbs
)) {
779 skb
= __skb_dequeue(&mpdus_skbs
);
781 ret
= iwl_mvm_tx_mpdu(mvm
, skb
, sta
);
783 __skb_queue_purge(&mpdus_skbs
);
791 static void iwl_mvm_check_ratid_empty(struct iwl_mvm
*mvm
,
792 struct ieee80211_sta
*sta
, u8 tid
)
794 struct iwl_mvm_sta
*mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
795 struct iwl_mvm_tid_data
*tid_data
= &mvmsta
->tid_data
[tid
];
796 struct ieee80211_vif
*vif
= mvmsta
->vif
;
798 lockdep_assert_held(&mvmsta
->lock
);
800 if ((tid_data
->state
== IWL_AGG_ON
||
801 tid_data
->state
== IWL_EMPTYING_HW_QUEUE_DELBA
) &&
802 iwl_mvm_tid_queued(tid_data
) == 0) {
804 * Now that this aggregation queue is empty tell mac80211 so it
805 * knows we no longer have frames buffered for the station on
806 * this TID (for the TIM bitmap calculation.)
808 ieee80211_sta_set_buffered(sta
, tid
, false);
811 if (tid_data
->ssn
!= tid_data
->next_reclaimed
)
814 switch (tid_data
->state
) {
815 case IWL_EMPTYING_HW_QUEUE_ADDBA
:
816 IWL_DEBUG_TX_QUEUES(mvm
,
817 "Can continue addBA flow ssn = next_recl = %d\n",
818 tid_data
->next_reclaimed
);
819 tid_data
->state
= IWL_AGG_STARTING
;
820 ieee80211_start_tx_ba_cb_irqsafe(vif
, sta
->addr
, tid
);
823 case IWL_EMPTYING_HW_QUEUE_DELBA
:
824 IWL_DEBUG_TX_QUEUES(mvm
,
825 "Can continue DELBA flow ssn = next_recl = %d\n",
826 tid_data
->next_reclaimed
);
827 iwl_mvm_disable_txq(mvm
, tid_data
->txq_id
,
828 vif
->hw_queue
[tid_to_mac80211_ac
[tid
]], tid
,
830 tid_data
->state
= IWL_AGG_OFF
;
831 ieee80211_stop_tx_ba_cb_irqsafe(vif
, sta
->addr
, tid
);
839 #ifdef CONFIG_IWLWIFI_DEBUG
840 const char *iwl_mvm_get_tx_fail_reason(u32 status
)
842 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
843 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
845 switch (status
& TX_STATUS_MSK
) {
846 case TX_STATUS_SUCCESS
:
848 TX_STATUS_POSTPONE(DELAY
);
849 TX_STATUS_POSTPONE(FEW_BYTES
);
850 TX_STATUS_POSTPONE(BT_PRIO
);
851 TX_STATUS_POSTPONE(QUIET_PERIOD
);
852 TX_STATUS_POSTPONE(CALC_TTAK
);
853 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY
);
854 TX_STATUS_FAIL(SHORT_LIMIT
);
855 TX_STATUS_FAIL(LONG_LIMIT
);
856 TX_STATUS_FAIL(UNDERRUN
);
857 TX_STATUS_FAIL(DRAIN_FLOW
);
858 TX_STATUS_FAIL(RFKILL_FLUSH
);
859 TX_STATUS_FAIL(LIFE_EXPIRE
);
860 TX_STATUS_FAIL(DEST_PS
);
861 TX_STATUS_FAIL(HOST_ABORTED
);
862 TX_STATUS_FAIL(BT_RETRY
);
863 TX_STATUS_FAIL(STA_INVALID
);
864 TX_STATUS_FAIL(FRAG_DROPPED
);
865 TX_STATUS_FAIL(TID_DISABLE
);
866 TX_STATUS_FAIL(FIFO_FLUSHED
);
867 TX_STATUS_FAIL(SMALL_CF_POLL
);
868 TX_STATUS_FAIL(FW_DROP
);
869 TX_STATUS_FAIL(STA_COLOR_MISMATCH
);
874 #undef TX_STATUS_FAIL
875 #undef TX_STATUS_POSTPONE
877 #endif /* CONFIG_IWLWIFI_DEBUG */
879 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags
,
880 enum ieee80211_band band
,
881 struct ieee80211_tx_rate
*r
)
883 if (rate_n_flags
& RATE_HT_MCS_GF_MSK
)
884 r
->flags
|= IEEE80211_TX_RC_GREEN_FIELD
;
885 switch (rate_n_flags
& RATE_MCS_CHAN_WIDTH_MSK
) {
886 case RATE_MCS_CHAN_WIDTH_20
:
888 case RATE_MCS_CHAN_WIDTH_40
:
889 r
->flags
|= IEEE80211_TX_RC_40_MHZ_WIDTH
;
891 case RATE_MCS_CHAN_WIDTH_80
:
892 r
->flags
|= IEEE80211_TX_RC_80_MHZ_WIDTH
;
894 case RATE_MCS_CHAN_WIDTH_160
:
895 r
->flags
|= IEEE80211_TX_RC_160_MHZ_WIDTH
;
898 if (rate_n_flags
& RATE_MCS_SGI_MSK
)
899 r
->flags
|= IEEE80211_TX_RC_SHORT_GI
;
900 if (rate_n_flags
& RATE_MCS_HT_MSK
) {
901 r
->flags
|= IEEE80211_TX_RC_MCS
;
902 r
->idx
= rate_n_flags
& RATE_HT_MCS_INDEX_MSK
;
903 } else if (rate_n_flags
& RATE_MCS_VHT_MSK
) {
904 ieee80211_rate_set_vht(
905 r
, rate_n_flags
& RATE_VHT_MCS_RATE_CODE_MSK
,
906 ((rate_n_flags
& RATE_VHT_MCS_NSS_MSK
) >>
907 RATE_VHT_MCS_NSS_POS
) + 1);
908 r
->flags
|= IEEE80211_TX_RC_VHT_MCS
;
910 r
->idx
= iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags
,
916 * translate ucode response to mac80211 tx status control values
918 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags
,
919 struct ieee80211_tx_info
*info
)
921 struct ieee80211_tx_rate
*r
= &info
->status
.rates
[0];
923 info
->status
.antenna
=
924 ((rate_n_flags
& RATE_MCS_ANT_ABC_MSK
) >> RATE_MCS_ANT_POS
);
925 iwl_mvm_hwrate_to_tx_rate(rate_n_flags
, info
->band
, r
);
928 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm
*mvm
,
931 struct iwl_fw_dbg_trigger_tlv
*trig
;
932 struct iwl_fw_dbg_trigger_tx_status
*status_trig
;
935 if (!iwl_fw_dbg_trigger_enabled(mvm
->fw
, FW_DBG_TRIGGER_TX_STATUS
))
938 trig
= iwl_fw_dbg_get_trigger(mvm
->fw
, FW_DBG_TRIGGER_TX_STATUS
);
939 status_trig
= (void *)trig
->data
;
941 if (!iwl_fw_dbg_trigger_check_stop(mvm
, NULL
, trig
))
944 for (i
= 0; i
< ARRAY_SIZE(status_trig
->statuses
); i
++) {
945 /* don't collect on status 0 */
946 if (!status_trig
->statuses
[i
].status
)
949 if (status_trig
->statuses
[i
].status
!= (status
& TX_STATUS_MSK
))
952 iwl_mvm_fw_dbg_collect_trig(mvm
, trig
,
953 "Tx status %d was received",
954 status
& TX_STATUS_MSK
);
959 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm
*mvm
,
960 struct iwl_rx_packet
*pkt
)
962 struct ieee80211_sta
*sta
;
963 u16 sequence
= le16_to_cpu(pkt
->hdr
.sequence
);
964 int txq_id
= SEQ_TO_QUEUE(sequence
);
965 struct iwl_mvm_tx_resp
*tx_resp
= (void *)pkt
->data
;
966 int sta_id
= IWL_MVM_TX_RES_GET_RA(tx_resp
->ra_tid
);
967 int tid
= IWL_MVM_TX_RES_GET_TID(tx_resp
->ra_tid
);
968 u32 status
= le16_to_cpu(tx_resp
->status
.status
);
969 u16 ssn
= iwl_mvm_get_scd_ssn(tx_resp
);
970 struct iwl_mvm_sta
*mvmsta
;
971 struct sk_buff_head skbs
;
973 u16 next_reclaimed
, seq_ctl
;
976 __skb_queue_head_init(&skbs
);
978 seq_ctl
= le16_to_cpu(tx_resp
->seq_ctl
);
980 /* we can free until ssn % q.n_bd not inclusive */
981 iwl_trans_reclaim(mvm
->trans
, txq_id
, ssn
, &skbs
);
983 while (!skb_queue_empty(&skbs
)) {
984 struct sk_buff
*skb
= __skb_dequeue(&skbs
);
985 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
989 iwl_trans_free_tx_cmd(mvm
->trans
, info
->driver_data
[1]);
991 memset(&info
->status
, 0, sizeof(info
->status
));
993 info
->flags
&= ~IEEE80211_TX_CTL_AMPDU
;
995 /* inform mac80211 about what happened with the frame */
996 switch (status
& TX_STATUS_MSK
) {
997 case TX_STATUS_SUCCESS
:
998 case TX_STATUS_DIRECT_DONE
:
999 info
->flags
|= IEEE80211_TX_STAT_ACK
;
1001 case TX_STATUS_FAIL_DEST_PS
:
1002 info
->flags
|= IEEE80211_TX_STAT_TX_FILTERED
;
1008 iwl_mvm_tx_status_check_trigger(mvm
, status
);
1010 info
->status
.rates
[0].count
= tx_resp
->failure_frame
+ 1;
1011 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp
->initial_rate
),
1013 info
->status
.status_driver_data
[1] =
1014 (void *)(uintptr_t)le32_to_cpu(tx_resp
->initial_rate
);
1016 /* Single frame failure in an AMPDU queue => send BAR */
1017 if (txq_id
>= mvm
->first_agg_queue
&&
1018 !(info
->flags
& IEEE80211_TX_STAT_ACK
) &&
1019 !(info
->flags
& IEEE80211_TX_STAT_TX_FILTERED
))
1020 info
->flags
|= IEEE80211_TX_STAT_AMPDU_NO_BACK
;
1022 /* W/A FW bug: seq_ctl is wrong when the status isn't success */
1023 if (status
!= TX_STATUS_SUCCESS
) {
1024 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
1025 seq_ctl
= le16_to_cpu(hdr
->seq_ctrl
);
1028 if (unlikely(!seq_ctl
)) {
1029 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
1032 * If it is an NDP, we can't update next_reclaim since
1033 * its sequence control is 0. Note that for that same
1034 * reason, NDPs are never sent to A-MPDU'able queues
1035 * so that we can never have more than one freed frame
1036 * for a single Tx resonse (see WARN_ON below).
1038 if (ieee80211_is_qos_nullfunc(hdr
->frame_control
))
1043 * TODO: this is not accurate if we are freeing more than one
1046 info
->status
.tx_time
=
1047 le16_to_cpu(tx_resp
->wireless_media_time
);
1048 BUILD_BUG_ON(ARRAY_SIZE(info
->status
.status_driver_data
) < 1);
1049 info
->status
.status_driver_data
[0] =
1050 (void *)(uintptr_t)tx_resp
->reduced_tpc
;
1052 ieee80211_tx_status(mvm
->hw
, skb
);
1055 if (txq_id
>= mvm
->first_agg_queue
) {
1056 /* If this is an aggregation queue, we use the ssn since:
1057 * ssn = wifi seq_num % 256.
1058 * The seq_ctl is the sequence control of the packet to which
1059 * this Tx response relates. But if there is a hole in the
1060 * bitmap of the BA we received, this Tx response may allow to
1061 * reclaim the hole and all the subsequent packets that were
1062 * already acked. In that case, seq_ctl != ssn, and the next
1063 * packet to be reclaimed will be ssn and not seq_ctl. In that
1064 * case, several packets will be reclaimed even if
1067 * The ssn is the index (% 256) of the latest packet that has
1068 * treated (acked / dropped) + 1.
1070 next_reclaimed
= ssn
;
1072 /* The next packet to be reclaimed is the one after this one */
1073 next_reclaimed
= IEEE80211_SEQ_TO_SN(seq_ctl
+ 0x10);
1076 IWL_DEBUG_TX_REPLY(mvm
,
1077 "TXQ %d status %s (0x%08x)\n",
1078 txq_id
, iwl_mvm_get_tx_fail_reason(status
), status
);
1080 IWL_DEBUG_TX_REPLY(mvm
,
1081 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
1082 le32_to_cpu(tx_resp
->initial_rate
),
1083 tx_resp
->failure_frame
, SEQ_TO_INDEX(sequence
),
1084 ssn
, next_reclaimed
, seq_ctl
);
1088 sta
= rcu_dereference(mvm
->fw_id_to_mac_id
[sta_id
]);
1090 * sta can't be NULL otherwise it'd mean that the sta has been freed in
1091 * the firmware while we still have packets for it in the Tx queues.
1093 if (WARN_ON_ONCE(!sta
))
1097 mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
1099 if (tid
!= IWL_TID_NON_QOS
) {
1100 struct iwl_mvm_tid_data
*tid_data
=
1101 &mvmsta
->tid_data
[tid
];
1102 bool send_eosp_ndp
= false;
1104 spin_lock_bh(&mvmsta
->lock
);
1106 tid_data
->next_reclaimed
= next_reclaimed
;
1107 IWL_DEBUG_TX_REPLY(mvm
,
1108 "Next reclaimed packet:%d\n",
1111 IWL_DEBUG_TX_REPLY(mvm
,
1112 "NDP - don't update next_reclaimed\n");
1115 iwl_mvm_check_ratid_empty(mvm
, sta
, tid
);
1117 if (mvmsta
->sleep_tx_count
) {
1118 mvmsta
->sleep_tx_count
--;
1119 if (mvmsta
->sleep_tx_count
&&
1120 !iwl_mvm_tid_queued(tid_data
)) {
1122 * The number of frames in the queue
1123 * dropped to 0 even if we sent less
1124 * frames than we thought we had on the
1126 * This means we had holes in the BA
1127 * window that we just filled, ask
1128 * mac80211 to send EOSP since the
1129 * firmware won't know how to do that.
1130 * Send NDP and the firmware will send
1131 * EOSP notification that will trigger
1132 * a call to ieee80211_sta_eosp().
1134 send_eosp_ndp
= true;
1138 spin_unlock_bh(&mvmsta
->lock
);
1139 if (send_eosp_ndp
) {
1140 iwl_mvm_sta_modify_sleep_tx_count(mvm
, sta
,
1141 IEEE80211_FRAME_RELEASE_UAPSD
,
1142 1, tid
, false, false);
1143 mvmsta
->sleep_tx_count
= 0;
1144 ieee80211_send_eosp_nullfunc(sta
, tid
);
1148 if (mvmsta
->next_status_eosp
) {
1149 mvmsta
->next_status_eosp
= false;
1150 ieee80211_sta_eosp(sta
);
1157 * If the txq is not an AMPDU queue, there is no chance we freed
1158 * several skbs. Check that out...
1160 if (txq_id
>= mvm
->first_agg_queue
)
1163 /* We can't free more than one frame at once on a shared queue */
1164 WARN_ON(skb_freed
> 1);
1166 /* If we have still frames for this STA nothing to do here */
1167 if (!atomic_sub_and_test(skb_freed
, &mvm
->pending_frames
[sta_id
]))
1170 if (mvmsta
&& mvmsta
->vif
->type
== NL80211_IFTYPE_AP
) {
1173 * If there are no pending frames for this STA and
1174 * the tx to this station is not disabled, notify
1175 * mac80211 that this station can now wake up in its
1177 * If mvmsta is not NULL, sta is valid.
1180 spin_lock_bh(&mvmsta
->lock
);
1182 if (!mvmsta
->disable_tx
)
1183 ieee80211_sta_block_awake(mvm
->hw
, sta
, false);
1185 spin_unlock_bh(&mvmsta
->lock
);
1188 if (PTR_ERR(sta
) == -EBUSY
|| PTR_ERR(sta
) == -ENOENT
) {
1190 * We are draining and this was the last packet - pre_rcu_remove
1191 * has been called already. We might be after the
1192 * synchronize_net already.
1193 * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues.
1195 set_bit(sta_id
, mvm
->sta_drained
);
1196 schedule_work(&mvm
->sta_drained_wk
);
1203 #ifdef CONFIG_IWLWIFI_DEBUG
1204 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
1205 static const char *iwl_get_agg_tx_status(u16 status
)
1207 switch (status
& AGG_TX_STATE_STATUS_MSK
) {
1208 AGG_TX_STATE_(TRANSMITTED
);
1209 AGG_TX_STATE_(UNDERRUN
);
1210 AGG_TX_STATE_(BT_PRIO
);
1211 AGG_TX_STATE_(FEW_BYTES
);
1212 AGG_TX_STATE_(ABORT
);
1213 AGG_TX_STATE_(LAST_SENT_TTL
);
1214 AGG_TX_STATE_(LAST_SENT_TRY_CNT
);
1215 AGG_TX_STATE_(LAST_SENT_BT_KILL
);
1216 AGG_TX_STATE_(SCD_QUERY
);
1217 AGG_TX_STATE_(TEST_BAD_CRC32
);
1218 AGG_TX_STATE_(RESPONSE
);
1219 AGG_TX_STATE_(DUMP_TX
);
1220 AGG_TX_STATE_(DELAY_TX
);
1226 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm
*mvm
,
1227 struct iwl_rx_packet
*pkt
)
1229 struct iwl_mvm_tx_resp
*tx_resp
= (void *)pkt
->data
;
1230 struct agg_tx_status
*frame_status
= &tx_resp
->status
;
1233 for (i
= 0; i
< tx_resp
->frame_count
; i
++) {
1234 u16 fstatus
= le16_to_cpu(frame_status
[i
].status
);
1236 IWL_DEBUG_TX_REPLY(mvm
,
1237 "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
1238 iwl_get_agg_tx_status(fstatus
),
1239 fstatus
& AGG_TX_STATE_STATUS_MSK
,
1240 (fstatus
& AGG_TX_STATE_TRY_CNT_MSK
) >>
1241 AGG_TX_STATE_TRY_CNT_POS
,
1242 le16_to_cpu(frame_status
[i
].sequence
));
1246 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm
*mvm
,
1247 struct iwl_rx_packet
*pkt
)
1249 #endif /* CONFIG_IWLWIFI_DEBUG */
1251 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm
*mvm
,
1252 struct iwl_rx_packet
*pkt
)
1254 struct iwl_mvm_tx_resp
*tx_resp
= (void *)pkt
->data
;
1255 int sta_id
= IWL_MVM_TX_RES_GET_RA(tx_resp
->ra_tid
);
1256 int tid
= IWL_MVM_TX_RES_GET_TID(tx_resp
->ra_tid
);
1257 u16 sequence
= le16_to_cpu(pkt
->hdr
.sequence
);
1258 struct ieee80211_sta
*sta
;
1260 if (WARN_ON_ONCE(SEQ_TO_QUEUE(sequence
) < mvm
->first_agg_queue
))
1263 if (WARN_ON_ONCE(tid
== IWL_TID_NON_QOS
))
1266 iwl_mvm_rx_tx_cmd_agg_dbg(mvm
, pkt
);
1270 sta
= rcu_dereference(mvm
->fw_id_to_mac_id
[sta_id
]);
1272 if (!WARN_ON_ONCE(IS_ERR_OR_NULL(sta
))) {
1273 struct iwl_mvm_sta
*mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
1274 mvmsta
->tid_data
[tid
].rate_n_flags
=
1275 le32_to_cpu(tx_resp
->initial_rate
);
1276 mvmsta
->tid_data
[tid
].tx_time
=
1277 le16_to_cpu(tx_resp
->wireless_media_time
);
1283 void iwl_mvm_rx_tx_cmd(struct iwl_mvm
*mvm
, struct iwl_rx_cmd_buffer
*rxb
)
1285 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
1286 struct iwl_mvm_tx_resp
*tx_resp
= (void *)pkt
->data
;
1288 if (tx_resp
->frame_count
== 1)
1289 iwl_mvm_rx_tx_cmd_single(mvm
, pkt
);
1291 iwl_mvm_rx_tx_cmd_agg(mvm
, pkt
);
1294 static void iwl_mvm_tx_info_from_ba_notif(struct ieee80211_tx_info
*info
,
1295 struct iwl_mvm_ba_notif
*ba_notif
,
1296 struct iwl_mvm_tid_data
*tid_data
)
1298 info
->flags
|= IEEE80211_TX_STAT_AMPDU
;
1299 info
->status
.ampdu_ack_len
= ba_notif
->txed_2_done
;
1300 info
->status
.ampdu_len
= ba_notif
->txed
;
1301 iwl_mvm_hwrate_to_tx_status(tid_data
->rate_n_flags
,
1303 /* TODO: not accounted if the whole A-MPDU failed */
1304 info
->status
.tx_time
= tid_data
->tx_time
;
1305 info
->status
.status_driver_data
[0] =
1306 (void *)(uintptr_t)ba_notif
->reduced_txp
;
1307 info
->status
.status_driver_data
[1] =
1308 (void *)(uintptr_t)tid_data
->rate_n_flags
;
1311 void iwl_mvm_rx_ba_notif(struct iwl_mvm
*mvm
, struct iwl_rx_cmd_buffer
*rxb
)
1313 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
1314 struct iwl_mvm_ba_notif
*ba_notif
= (void *)pkt
->data
;
1315 struct sk_buff_head reclaimed_skbs
;
1316 struct iwl_mvm_tid_data
*tid_data
;
1317 struct ieee80211_sta
*sta
;
1318 struct iwl_mvm_sta
*mvmsta
;
1319 struct sk_buff
*skb
;
1320 int sta_id
, tid
, freed
;
1321 /* "flow" corresponds to Tx queue */
1322 u16 scd_flow
= le16_to_cpu(ba_notif
->scd_flow
);
1323 /* "ssn" is start of block-ack Tx window, corresponds to index
1324 * (in Tx queue's circular buffer) of first TFD/frame in window */
1325 u16 ba_resp_scd_ssn
= le16_to_cpu(ba_notif
->scd_ssn
);
1327 sta_id
= ba_notif
->sta_id
;
1328 tid
= ba_notif
->tid
;
1330 if (WARN_ONCE(sta_id
>= IWL_MVM_STATION_COUNT
||
1331 tid
>= IWL_MAX_TID_COUNT
,
1332 "sta_id %d tid %d", sta_id
, tid
))
1337 sta
= rcu_dereference(mvm
->fw_id_to_mac_id
[sta_id
]);
1339 /* Reclaiming frames for a station that has been deleted ? */
1340 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta
))) {
1345 mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
1346 tid_data
= &mvmsta
->tid_data
[tid
];
1348 if (tid_data
->txq_id
!= scd_flow
) {
1350 "invalid BA notification: Q %d, tid %d, flow %d\n",
1351 tid_data
->txq_id
, tid
, scd_flow
);
1356 spin_lock_bh(&mvmsta
->lock
);
1358 __skb_queue_head_init(&reclaimed_skbs
);
1361 * Release all TFDs before the SSN, i.e. all TFDs in front of
1362 * block-ack window (we assume that they've been successfully
1363 * transmitted ... if not, it's too late anyway).
1365 iwl_trans_reclaim(mvm
->trans
, scd_flow
, ba_resp_scd_ssn
,
1368 IWL_DEBUG_TX_REPLY(mvm
,
1369 "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
1370 (u8
*)&ba_notif
->sta_addr_lo32
,
1372 IWL_DEBUG_TX_REPLY(mvm
,
1373 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1374 ba_notif
->tid
, le16_to_cpu(ba_notif
->seq_ctl
),
1375 (unsigned long long)le64_to_cpu(ba_notif
->bitmap
),
1376 scd_flow
, ba_resp_scd_ssn
, ba_notif
->txed
,
1377 ba_notif
->txed_2_done
);
1379 IWL_DEBUG_TX_REPLY(mvm
, "reduced txp from ba notif %d\n",
1380 ba_notif
->reduced_txp
);
1381 tid_data
->next_reclaimed
= ba_resp_scd_ssn
;
1383 iwl_mvm_check_ratid_empty(mvm
, sta
, tid
);
1387 skb_queue_walk(&reclaimed_skbs
, skb
) {
1388 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
1389 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1391 if (ieee80211_is_data_qos(hdr
->frame_control
))
1396 iwl_trans_free_tx_cmd(mvm
->trans
, info
->driver_data
[1]);
1398 memset(&info
->status
, 0, sizeof(info
->status
));
1399 /* Packet was transmitted successfully, failures come as single
1400 * frames because before failing a frame the firmware transmits
1401 * it without aggregation at least once.
1403 info
->flags
|= IEEE80211_TX_STAT_ACK
;
1405 /* this is the first skb we deliver in this batch */
1406 /* put the rate scaling data there */
1408 iwl_mvm_tx_info_from_ba_notif(info
, ba_notif
, tid_data
);
1411 spin_unlock_bh(&mvmsta
->lock
);
1413 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
1414 * possible (i.e. first MPDU in the aggregation wasn't acked)
1415 * Still it's important to update RS about sent vs. acked.
1417 if (skb_queue_empty(&reclaimed_skbs
)) {
1418 struct ieee80211_tx_info ba_info
= {};
1419 struct ieee80211_chanctx_conf
*chanctx_conf
= NULL
;
1423 rcu_dereference(mvmsta
->vif
->chanctx_conf
);
1425 if (WARN_ON_ONCE(!chanctx_conf
))
1428 ba_info
.band
= chanctx_conf
->def
.chan
->band
;
1429 iwl_mvm_tx_info_from_ba_notif(&ba_info
, ba_notif
, tid_data
);
1431 IWL_DEBUG_TX_REPLY(mvm
, "No reclaim. Update rs directly\n");
1432 iwl_mvm_rs_tx_status(mvm
, sta
, tid
, &ba_info
);
1438 while (!skb_queue_empty(&reclaimed_skbs
)) {
1439 skb
= __skb_dequeue(&reclaimed_skbs
);
1440 ieee80211_tx_status(mvm
->hw
, skb
);
1445 * Note that there are transports that buffer frames before they reach
1446 * the firmware. This means that after flush_tx_path is called, the
1447 * queue might not be empty. The race-free way to handle this is to:
1448 * 1) set the station as draining
1449 * 2) flush the Tx path
1450 * 3) wait for the transport queues to be empty
1452 int iwl_mvm_flush_tx_path(struct iwl_mvm
*mvm
, u32 tfd_msk
, u32 flags
)
1455 struct iwl_tx_path_flush_cmd flush_cmd
= {
1456 .queues_ctl
= cpu_to_le32(tfd_msk
),
1457 .flush_ctl
= cpu_to_le16(DUMP_TX_FIFO_FLUSH
),
1460 ret
= iwl_mvm_send_cmd_pdu(mvm
, TXPATH_FLUSH
, flags
,
1461 sizeof(flush_cmd
), &flush_cmd
);
1463 IWL_ERR(mvm
, "Failed to send flush command (%d)\n", ret
);