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) 2015 - 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 * The full GNU General Public License is included in this distribution
22 * in the file called COPYING.
24 * Contact Information:
25 * Intel Linux Wireless <ilw@linux.intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
30 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
31 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
32 * Copyright(c) 2015 - 2017 Intel Deutschland GmbH
33 * All rights reserved.
35 * Redistribution and use in source and binary forms, with or without
36 * modification, are permitted provided that the following conditions
39 * * Redistributions of source code must retain the above copyright
40 * notice, this list of conditions and the following disclaimer.
41 * * Redistributions in binary form must reproduce the above copyright
42 * notice, this list of conditions and the following disclaimer in
43 * the documentation and/or other materials provided with the
45 * * Neither the name Intel Corporation nor the names of its
46 * contributors may be used to endorse or promote products derived
47 * from this software without specific prior written permission.
49 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
50 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
51 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
52 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
53 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
54 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
55 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
56 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
57 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
58 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
59 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
60 *****************************************************************************/
61 #include <linux/etherdevice.h>
62 #include <linux/skbuff.h>
63 #include "iwl-trans.h"
68 static inline int iwl_mvm_check_pn(struct iwl_mvm
*mvm
, struct sk_buff
*skb
,
69 int queue
, struct ieee80211_sta
*sta
)
71 struct iwl_mvm_sta
*mvmsta
;
72 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
73 struct ieee80211_rx_status
*stats
= IEEE80211_SKB_RXCB(skb
);
74 struct iwl_mvm_key_pn
*ptk_pn
;
76 u8 pn
[IEEE80211_CCMP_PN_LEN
];
81 /* multicast and non-data only arrives on default queue */
82 if (!ieee80211_is_data(hdr
->frame_control
) ||
83 is_multicast_ether_addr(hdr
->addr1
))
86 /* do not check PN for open AP */
87 if (!(stats
->flag
& RX_FLAG_DECRYPTED
))
91 * avoid checking for default queue - we don't want to replicate
92 * all the logic that's necessary for checking the PN on fragmented
93 * frames, leave that to mac80211
98 /* if we are here - this for sure is either CCMP or GCMP */
99 if (IS_ERR_OR_NULL(sta
)) {
101 "expected hw-decrypted unicast frame for station\n");
105 mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
107 extiv
= (u8
*)hdr
+ ieee80211_hdrlen(hdr
->frame_control
);
108 keyidx
= extiv
[3] >> 6;
110 ptk_pn
= rcu_dereference(mvmsta
->ptk_pn
[keyidx
]);
114 if (ieee80211_is_data_qos(hdr
->frame_control
))
115 tid
= *ieee80211_get_qos_ctl(hdr
) & IEEE80211_QOS_CTL_TID_MASK
;
119 /* we don't use HCCA/802.11 QoS TSPECs, so drop such frames */
120 if (tid
>= IWL_MAX_TID_COUNT
)
131 if (memcmp(pn
, ptk_pn
->q
[queue
].pn
[tid
],
132 IEEE80211_CCMP_PN_LEN
) <= 0)
135 if (!(stats
->flag
& RX_FLAG_AMSDU_MORE
))
136 memcpy(ptk_pn
->q
[queue
].pn
[tid
], pn
, IEEE80211_CCMP_PN_LEN
);
137 stats
->flag
|= RX_FLAG_PN_VALIDATED
;
142 /* iwl_mvm_create_skb Adds the rxb to a new skb */
143 static void iwl_mvm_create_skb(struct sk_buff
*skb
, struct ieee80211_hdr
*hdr
,
144 u16 len
, u8 crypt_len
,
145 struct iwl_rx_cmd_buffer
*rxb
)
147 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
148 struct iwl_rx_mpdu_desc
*desc
= (void *)pkt
->data
;
149 unsigned int headlen
, fraglen
, pad_len
= 0;
150 unsigned int hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
152 if (desc
->mac_flags2
& IWL_RX_MPDU_MFLG2_PAD
) {
156 * If the device inserted padding it means that (it thought)
157 * the 802.11 header wasn't a multiple of 4 bytes long. In
158 * this case, reserve two bytes at the start of the SKB to
159 * align the payload properly in case we end up copying it.
161 skb_reserve(skb
, pad_len
);
165 /* If frame is small enough to fit in skb->head, pull it completely.
166 * If not, only pull ieee80211_hdr (including crypto if present, and
167 * an additional 8 bytes for SNAP/ethertype, see below) so that
168 * splice() or TCP coalesce are more efficient.
170 * Since, in addition, ieee80211_data_to_8023() always pull in at
171 * least 8 bytes (possibly more for mesh) we can do the same here
172 * to save the cost of doing it later. That still doesn't pull in
173 * the actual IP header since the typical case has a SNAP header.
174 * If the latter changes (there are efforts in the standards group
175 * to do so) we should revisit this and ieee80211_data_to_8023().
177 headlen
= (len
<= skb_tailroom(skb
)) ? len
:
178 hdrlen
+ crypt_len
+ 8;
180 /* The firmware may align the packet to DWORD.
181 * The padding is inserted after the IV.
182 * After copying the header + IV skip the padding if
183 * present before copying packet data.
186 memcpy(skb_put(skb
, hdrlen
), hdr
, hdrlen
);
187 memcpy(skb_put(skb
, headlen
- hdrlen
), (u8
*)hdr
+ hdrlen
+ pad_len
,
190 fraglen
= len
- headlen
;
193 int offset
= (void *)hdr
+ headlen
+ pad_len
-
194 rxb_addr(rxb
) + rxb_offset(rxb
);
196 skb_add_rx_frag(skb
, 0, rxb_steal_page(rxb
), offset
,
197 fraglen
, rxb
->truesize
);
201 /* iwl_mvm_pass_packet_to_mac80211 - passes the packet for mac80211 */
202 static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm
*mvm
,
203 struct napi_struct
*napi
,
204 struct sk_buff
*skb
, int queue
,
205 struct ieee80211_sta
*sta
)
207 if (iwl_mvm_check_pn(mvm
, skb
, queue
, sta
))
210 ieee80211_rx_napi(mvm
->hw
, sta
, skb
, napi
);
213 static void iwl_mvm_get_signal_strength(struct iwl_mvm
*mvm
,
214 struct iwl_rx_mpdu_desc
*desc
,
215 struct ieee80211_rx_status
*rx_status
)
217 int energy_a
, energy_b
, max_energy
;
219 energy_a
= desc
->energy_a
;
220 energy_a
= energy_a
? -energy_a
: S8_MIN
;
221 energy_b
= desc
->energy_b
;
222 energy_b
= energy_b
? -energy_b
: S8_MIN
;
223 max_energy
= max(energy_a
, energy_b
);
225 IWL_DEBUG_STATS(mvm
, "energy In A %d B %d, and max %d\n",
226 energy_a
, energy_b
, max_energy
);
228 rx_status
->signal
= max_energy
;
229 rx_status
->chains
= 0; /* TODO: phy info */
230 rx_status
->chain_signal
[0] = energy_a
;
231 rx_status
->chain_signal
[1] = energy_b
;
232 rx_status
->chain_signal
[2] = S8_MIN
;
235 static int iwl_mvm_rx_crypto(struct iwl_mvm
*mvm
, struct ieee80211_hdr
*hdr
,
236 struct ieee80211_rx_status
*stats
,
237 struct iwl_rx_mpdu_desc
*desc
, int queue
,
240 u16 status
= le16_to_cpu(desc
->status
);
242 if (!ieee80211_has_protected(hdr
->frame_control
) ||
243 (status
& IWL_RX_MPDU_STATUS_SEC_MASK
) ==
244 IWL_RX_MPDU_STATUS_SEC_NONE
)
247 /* TODO: handle packets encrypted with unknown alg */
249 switch (status
& IWL_RX_MPDU_STATUS_SEC_MASK
) {
250 case IWL_RX_MPDU_STATUS_SEC_CCM
:
251 case IWL_RX_MPDU_STATUS_SEC_GCM
:
252 BUILD_BUG_ON(IEEE80211_CCMP_PN_LEN
!= IEEE80211_GCMP_PN_LEN
);
253 /* alg is CCM: check MIC only */
254 if (!(status
& IWL_RX_MPDU_STATUS_MIC_OK
))
257 stats
->flag
|= RX_FLAG_DECRYPTED
;
258 *crypt_len
= IEEE80211_CCMP_HDR_LEN
;
260 case IWL_RX_MPDU_STATUS_SEC_TKIP
:
261 /* Don't drop the frame and decrypt it in SW */
262 if (!(status
& IWL_RX_MPDU_RES_STATUS_TTAK_OK
))
265 *crypt_len
= IEEE80211_TKIP_IV_LEN
;
266 /* fall through if TTAK OK */
267 case IWL_RX_MPDU_STATUS_SEC_WEP
:
268 if (!(status
& IWL_RX_MPDU_STATUS_ICV_OK
))
271 stats
->flag
|= RX_FLAG_DECRYPTED
;
272 if ((status
& IWL_RX_MPDU_STATUS_SEC_MASK
) ==
273 IWL_RX_MPDU_STATUS_SEC_WEP
)
274 *crypt_len
= IEEE80211_WEP_IV_LEN
;
276 case IWL_RX_MPDU_STATUS_SEC_EXT_ENC
:
277 if (!(status
& IWL_RX_MPDU_STATUS_MIC_OK
))
279 stats
->flag
|= RX_FLAG_DECRYPTED
;
282 IWL_ERR(mvm
, "Unhandled alg: 0x%x\n", status
);
288 static void iwl_mvm_rx_csum(struct ieee80211_sta
*sta
,
290 struct iwl_rx_mpdu_desc
*desc
)
292 struct iwl_mvm_sta
*mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
293 struct iwl_mvm_vif
*mvmvif
= iwl_mvm_vif_from_mac80211(mvmsta
->vif
);
294 u16 flags
= le16_to_cpu(desc
->l3l4_flags
);
295 u8 l3_prot
= (u8
)((flags
& IWL_RX_L3L4_L3_PROTO_MASK
) >>
296 IWL_RX_L3_PROTO_POS
);
298 if (mvmvif
->features
& NETIF_F_RXCSUM
&&
299 flags
& IWL_RX_L3L4_TCP_UDP_CSUM_OK
&&
300 (flags
& IWL_RX_L3L4_IP_HDR_CSUM_OK
||
301 l3_prot
== IWL_RX_L3_TYPE_IPV6
||
302 l3_prot
== IWL_RX_L3_TYPE_IPV6_FRAG
))
303 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
307 * returns true if a packet outside BA session is a duplicate and
310 static bool iwl_mvm_is_nonagg_dup(struct ieee80211_sta
*sta
, int queue
,
311 struct ieee80211_rx_status
*rx_status
,
312 struct ieee80211_hdr
*hdr
,
313 struct iwl_rx_mpdu_desc
*desc
)
315 struct iwl_mvm_sta
*mvm_sta
;
316 struct iwl_mvm_rxq_dup_data
*dup_data
;
317 u8 baid
, tid
, sub_frame_idx
;
319 if (WARN_ON(IS_ERR_OR_NULL(sta
)))
322 baid
= (le32_to_cpu(desc
->reorder_data
) &
323 IWL_RX_MPDU_REORDER_BAID_MASK
) >>
324 IWL_RX_MPDU_REORDER_BAID_SHIFT
;
326 if (baid
!= IWL_RX_REORDER_DATA_INVALID_BAID
)
329 mvm_sta
= iwl_mvm_sta_from_mac80211(sta
);
330 dup_data
= &mvm_sta
->dup_data
[queue
];
333 * Drop duplicate 802.11 retransmissions
334 * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery")
336 if (ieee80211_is_ctl(hdr
->frame_control
) ||
337 ieee80211_is_qos_nullfunc(hdr
->frame_control
) ||
338 is_multicast_ether_addr(hdr
->addr1
)) {
339 rx_status
->flag
|= RX_FLAG_DUP_VALIDATED
;
343 if (ieee80211_is_data_qos(hdr
->frame_control
))
344 /* frame has qos control */
345 tid
= *ieee80211_get_qos_ctl(hdr
) &
346 IEEE80211_QOS_CTL_TID_MASK
;
348 tid
= IWL_MAX_TID_COUNT
;
350 /* If this wasn't a part of an A-MSDU the sub-frame index will be 0 */
351 sub_frame_idx
= desc
->amsdu_info
& IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK
;
353 if (unlikely(ieee80211_has_retry(hdr
->frame_control
) &&
354 dup_data
->last_seq
[tid
] == hdr
->seq_ctrl
&&
355 dup_data
->last_sub_frame
[tid
] >= sub_frame_idx
))
358 dup_data
->last_seq
[tid
] = hdr
->seq_ctrl
;
359 dup_data
->last_sub_frame
[tid
] = sub_frame_idx
;
361 rx_status
->flag
|= RX_FLAG_DUP_VALIDATED
;
366 int iwl_mvm_notify_rx_queue(struct iwl_mvm
*mvm
, u32 rxq_mask
,
367 const u8
*data
, u32 count
)
369 struct iwl_rxq_sync_cmd
*cmd
;
370 u32 data_size
= sizeof(*cmd
) + count
;
373 /* should be DWORD aligned */
374 if (WARN_ON(count
& 3 || count
> IWL_MULTI_QUEUE_SYNC_MSG_MAX_SIZE
))
377 cmd
= kzalloc(data_size
, GFP_KERNEL
);
381 cmd
->rxq_mask
= cpu_to_le32(rxq_mask
);
382 cmd
->count
= cpu_to_le32(count
);
384 memcpy(cmd
->payload
, data
, count
);
386 ret
= iwl_mvm_send_cmd_pdu(mvm
,
387 WIDE_ID(DATA_PATH_GROUP
,
388 TRIGGER_RX_QUEUES_NOTIF_CMD
),
396 * Returns true if sn2 - buffer_size < sn1 < sn2.
397 * To be used only in order to compare reorder buffer head with NSSN.
398 * We fully trust NSSN unless it is behind us due to reorder timeout.
399 * Reorder timeout can only bring us up to buffer_size SNs ahead of NSSN.
401 static bool iwl_mvm_is_sn_less(u16 sn1
, u16 sn2
, u16 buffer_size
)
403 return ieee80211_sn_less(sn1
, sn2
) &&
404 !ieee80211_sn_less(sn1
, sn2
- buffer_size
);
407 #define RX_REORDER_BUF_TIMEOUT_MQ (HZ / 10)
409 static void iwl_mvm_release_frames(struct iwl_mvm
*mvm
,
410 struct ieee80211_sta
*sta
,
411 struct napi_struct
*napi
,
412 struct iwl_mvm_reorder_buffer
*reorder_buf
,
415 u16 ssn
= reorder_buf
->head_sn
;
417 lockdep_assert_held(&reorder_buf
->lock
);
419 /* ignore nssn smaller than head sn - this can happen due to timeout */
420 if (iwl_mvm_is_sn_less(nssn
, ssn
, reorder_buf
->buf_size
))
423 while (iwl_mvm_is_sn_less(ssn
, nssn
, reorder_buf
->buf_size
)) {
424 int index
= ssn
% reorder_buf
->buf_size
;
425 struct sk_buff_head
*skb_list
= &reorder_buf
->entries
[index
];
428 ssn
= ieee80211_sn_inc(ssn
);
431 * Empty the list. Will have more than one frame for A-MSDU.
432 * Empty list is valid as well since nssn indicates frames were
435 while ((skb
= __skb_dequeue(skb_list
))) {
436 iwl_mvm_pass_packet_to_mac80211(mvm
, napi
, skb
,
439 reorder_buf
->num_stored
--;
442 reorder_buf
->head_sn
= nssn
;
445 if (reorder_buf
->num_stored
&& !reorder_buf
->removed
) {
446 u16 index
= reorder_buf
->head_sn
% reorder_buf
->buf_size
;
448 while (skb_queue_empty(&reorder_buf
->entries
[index
]))
449 index
= (index
+ 1) % reorder_buf
->buf_size
;
450 /* modify timer to match next frame's expiration time */
451 mod_timer(&reorder_buf
->reorder_timer
,
452 reorder_buf
->reorder_time
[index
] + 1 +
453 RX_REORDER_BUF_TIMEOUT_MQ
);
455 del_timer(&reorder_buf
->reorder_timer
);
459 void iwl_mvm_reorder_timer_expired(unsigned long data
)
461 struct iwl_mvm_reorder_buffer
*buf
= (void *)data
;
463 u16 sn
= 0, index
= 0;
464 bool expired
= false;
467 spin_lock(&buf
->lock
);
469 if (!buf
->num_stored
|| buf
->removed
) {
470 spin_unlock(&buf
->lock
);
474 for (i
= 0; i
< buf
->buf_size
; i
++) {
475 index
= (buf
->head_sn
+ i
) % buf
->buf_size
;
477 if (skb_queue_empty(&buf
->entries
[index
])) {
479 * If there is a hole and the next frame didn't expire
480 * we want to break and not advance SN
485 if (!cont
&& !time_after(jiffies
, buf
->reorder_time
[index
] +
486 RX_REORDER_BUF_TIMEOUT_MQ
))
490 /* continue until next hole after this expired frames */
492 sn
= ieee80211_sn_add(buf
->head_sn
, i
+ 1);
496 struct ieee80211_sta
*sta
;
499 sta
= rcu_dereference(buf
->mvm
->fw_id_to_mac_id
[buf
->sta_id
]);
500 /* SN is set to the last expired frame + 1 */
501 IWL_DEBUG_HT(buf
->mvm
,
502 "Releasing expired frames for sta %u, sn %d\n",
504 iwl_mvm_release_frames(buf
->mvm
, sta
, NULL
, buf
, sn
);
506 } else if (buf
->num_stored
) {
508 * If no frame expired and there are stored frames, index is now
509 * pointing to the first unexpired frame - modify timer
510 * accordingly to this frame.
512 mod_timer(&buf
->reorder_timer
,
513 buf
->reorder_time
[index
] +
514 1 + RX_REORDER_BUF_TIMEOUT_MQ
);
516 spin_unlock(&buf
->lock
);
519 static void iwl_mvm_del_ba(struct iwl_mvm
*mvm
, int queue
,
520 struct iwl_mvm_delba_data
*data
)
522 struct iwl_mvm_baid_data
*ba_data
;
523 struct ieee80211_sta
*sta
;
524 struct iwl_mvm_reorder_buffer
*reorder_buf
;
525 u8 baid
= data
->baid
;
527 if (WARN_ONCE(baid
>= IWL_MAX_BAID
, "invalid BAID: %x\n", baid
))
532 ba_data
= rcu_dereference(mvm
->baid_map
[baid
]);
533 if (WARN_ON_ONCE(!ba_data
))
536 sta
= rcu_dereference(mvm
->fw_id_to_mac_id
[ba_data
->sta_id
]);
537 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta
)))
540 reorder_buf
= &ba_data
->reorder_buf
[queue
];
542 /* release all frames that are in the reorder buffer to the stack */
543 spin_lock_bh(&reorder_buf
->lock
);
544 iwl_mvm_release_frames(mvm
, sta
, NULL
, reorder_buf
,
545 ieee80211_sn_add(reorder_buf
->head_sn
,
546 reorder_buf
->buf_size
));
547 spin_unlock_bh(&reorder_buf
->lock
);
548 del_timer_sync(&reorder_buf
->reorder_timer
);
554 void iwl_mvm_rx_queue_notif(struct iwl_mvm
*mvm
, struct iwl_rx_cmd_buffer
*rxb
,
557 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
558 struct iwl_rxq_sync_notification
*notif
;
559 struct iwl_mvm_internal_rxq_notif
*internal_notif
;
561 notif
= (void *)pkt
->data
;
562 internal_notif
= (void *)notif
->payload
;
564 if (internal_notif
->sync
) {
565 if (mvm
->queue_sync_cookie
!= internal_notif
->cookie
) {
567 "Received expired RX queue sync message\n");
570 if (!atomic_dec_return(&mvm
->queue_sync_counter
))
571 wake_up(&mvm
->rx_sync_waitq
);
574 switch (internal_notif
->type
) {
575 case IWL_MVM_RXQ_EMPTY
:
577 case IWL_MVM_RXQ_NOTIF_DEL_BA
:
578 iwl_mvm_del_ba(mvm
, queue
, (void *)internal_notif
->data
);
581 WARN_ONCE(1, "Invalid identifier %d", internal_notif
->type
);
586 * Returns true if the MPDU was buffered\dropped, false if it should be passed
589 static bool iwl_mvm_reorder(struct iwl_mvm
*mvm
,
590 struct napi_struct
*napi
,
592 struct ieee80211_sta
*sta
,
594 struct iwl_rx_mpdu_desc
*desc
)
596 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
597 struct iwl_mvm_sta
*mvm_sta
;
598 struct iwl_mvm_baid_data
*baid_data
;
599 struct iwl_mvm_reorder_buffer
*buffer
;
600 struct sk_buff
*tail
;
601 u32 reorder
= le32_to_cpu(desc
->reorder_data
);
602 bool amsdu
= desc
->mac_flags2
& IWL_RX_MPDU_MFLG2_AMSDU
;
604 desc
->amsdu_info
& IWL_RX_MPDU_AMSDU_LAST_SUBFRAME
;
605 u8 tid
= *ieee80211_get_qos_ctl(hdr
) & IEEE80211_QOS_CTL_TID_MASK
;
606 u8 sub_frame_idx
= desc
->amsdu_info
&
607 IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK
;
612 baid
= (reorder
& IWL_RX_MPDU_REORDER_BAID_MASK
) >>
613 IWL_RX_MPDU_REORDER_BAID_SHIFT
;
616 * This also covers the case of receiving a Block Ack Request
617 * outside a BA session; we'll pass it to mac80211 and that
618 * then sends a delBA action frame.
620 if (baid
== IWL_RX_REORDER_DATA_INVALID_BAID
)
624 if (WARN_ON(IS_ERR_OR_NULL(sta
)))
627 mvm_sta
= iwl_mvm_sta_from_mac80211(sta
);
629 /* not a data packet or a bar */
630 if (!ieee80211_is_back_req(hdr
->frame_control
) &&
631 (!ieee80211_is_data_qos(hdr
->frame_control
) ||
632 is_multicast_ether_addr(hdr
->addr1
)))
635 if (unlikely(!ieee80211_is_data_present(hdr
->frame_control
)))
638 baid_data
= rcu_dereference(mvm
->baid_map
[baid
]);
640 WARN(!(reorder
& IWL_RX_MPDU_REORDER_BA_OLD_SN
),
641 "Received baid %d, but no data exists for this BAID\n",
646 if (WARN(tid
!= baid_data
->tid
|| mvm_sta
->sta_id
!= baid_data
->sta_id
,
647 "baid 0x%x is mapped to sta:%d tid:%d, but was received for sta:%d tid:%d\n",
648 baid
, baid_data
->sta_id
, baid_data
->tid
, mvm_sta
->sta_id
,
652 nssn
= reorder
& IWL_RX_MPDU_REORDER_NSSN_MASK
;
653 sn
= (reorder
& IWL_RX_MPDU_REORDER_SN_MASK
) >>
654 IWL_RX_MPDU_REORDER_SN_SHIFT
;
656 buffer
= &baid_data
->reorder_buf
[queue
];
658 spin_lock_bh(&buffer
->lock
);
660 if (!buffer
->valid
) {
661 if (reorder
& IWL_RX_MPDU_REORDER_BA_OLD_SN
) {
662 spin_unlock_bh(&buffer
->lock
);
665 buffer
->valid
= true;
668 if (ieee80211_is_back_req(hdr
->frame_control
)) {
669 iwl_mvm_release_frames(mvm
, sta
, napi
, buffer
, nssn
);
674 * If there was a significant jump in the nssn - adjust.
675 * If the SN is smaller than the NSSN it might need to first go into
676 * the reorder buffer, in which case we just release up to it and the
677 * rest of the function will take of storing it and releasing up to the
680 if (!iwl_mvm_is_sn_less(nssn
, buffer
->head_sn
+ buffer
->buf_size
,
682 u16 min_sn
= ieee80211_sn_less(sn
, nssn
) ? sn
: nssn
;
684 iwl_mvm_release_frames(mvm
, sta
, napi
, buffer
, min_sn
);
687 /* drop any oudated packets */
688 if (ieee80211_sn_less(sn
, buffer
->head_sn
))
691 /* release immediately if allowed by nssn and no stored frames */
692 if (!buffer
->num_stored
&& ieee80211_sn_less(sn
, nssn
)) {
693 if (iwl_mvm_is_sn_less(buffer
->head_sn
, nssn
,
695 (!amsdu
|| last_subframe
))
696 buffer
->head_sn
= nssn
;
697 /* No need to update AMSDU last SN - we are moving the head */
698 spin_unlock_bh(&buffer
->lock
);
702 index
= sn
% buffer
->buf_size
;
705 * Check if we already stored this frame
706 * As AMSDU is either received or not as whole, logic is simple:
707 * If we have frames in that position in the buffer and the last frame
708 * originated from AMSDU had a different SN then it is a retransmission.
709 * If it is the same SN then if the subframe index is incrementing it
710 * is the same AMSDU - otherwise it is a retransmission.
712 tail
= skb_peek_tail(&buffer
->entries
[index
]);
715 else if (tail
&& (sn
!= buffer
->last_amsdu
||
716 buffer
->last_sub_index
>= sub_frame_idx
))
719 /* put in reorder buffer */
720 __skb_queue_tail(&buffer
->entries
[index
], skb
);
721 buffer
->num_stored
++;
722 buffer
->reorder_time
[index
] = jiffies
;
725 buffer
->last_amsdu
= sn
;
726 buffer
->last_sub_index
= sub_frame_idx
;
730 * We cannot trust NSSN for AMSDU sub-frames that are not the last.
731 * The reason is that NSSN advances on the first sub-frame, and may
732 * cause the reorder buffer to advance before all the sub-frames arrive.
733 * Example: reorder buffer contains SN 0 & 2, and we receive AMSDU with
734 * SN 1. NSSN for first sub frame will be 3 with the result of driver
735 * releasing SN 0,1, 2. When sub-frame 1 arrives - reorder buffer is
736 * already ahead and it will be dropped.
737 * If the last sub-frame is not on this queue - we will get frame
738 * release notification with up to date NSSN.
740 if (!amsdu
|| last_subframe
)
741 iwl_mvm_release_frames(mvm
, sta
, napi
, buffer
, nssn
);
743 spin_unlock_bh(&buffer
->lock
);
748 spin_unlock_bh(&buffer
->lock
);
752 static void iwl_mvm_agg_rx_received(struct iwl_mvm
*mvm
,
753 u32 reorder_data
, u8 baid
)
755 unsigned long now
= jiffies
;
756 unsigned long timeout
;
757 struct iwl_mvm_baid_data
*data
;
761 data
= rcu_dereference(mvm
->baid_map
[baid
]);
763 WARN_ON(!(reorder_data
& IWL_RX_MPDU_REORDER_BA_OLD_SN
));
770 timeout
= data
->timeout
;
772 * Do not update last rx all the time to avoid cache bouncing
773 * between the rx queues.
774 * Update it every timeout. Worst case is the session will
775 * expire after ~ 2 * timeout, which doesn't matter that much.
777 if (time_before(data
->last_rx
+ TU_TO_JIFFIES(timeout
), now
))
778 /* Update is atomic */
785 void iwl_mvm_rx_mpdu_mq(struct iwl_mvm
*mvm
, struct napi_struct
*napi
,
786 struct iwl_rx_cmd_buffer
*rxb
, int queue
)
788 struct ieee80211_rx_status
*rx_status
;
789 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
790 struct iwl_rx_mpdu_desc
*desc
= (void *)pkt
->data
;
791 struct ieee80211_hdr
*hdr
= (void *)(pkt
->data
+ sizeof(*desc
));
792 u32 len
= le16_to_cpu(desc
->mpdu_len
);
793 u32 rate_n_flags
= le32_to_cpu(desc
->rate_n_flags
);
794 u16 phy_info
= le16_to_cpu(desc
->phy_info
);
795 struct ieee80211_sta
*sta
= NULL
;
799 /* Dont use dev_alloc_skb(), we'll have enough headroom once
800 * ieee80211_hdr pulled.
802 skb
= alloc_skb(128, GFP_ATOMIC
);
804 IWL_ERR(mvm
, "alloc_skb failed\n");
808 rx_status
= IEEE80211_SKB_RXCB(skb
);
810 if (iwl_mvm_rx_crypto(mvm
, hdr
, rx_status
, desc
, queue
, &crypt_len
)) {
816 * Keep packets with CRC errors (and with overrun) for monitor mode
817 * (otherwise the firmware discards them) but mark them as bad.
819 if (!(desc
->status
& cpu_to_le16(IWL_RX_MPDU_STATUS_CRC_OK
)) ||
820 !(desc
->status
& cpu_to_le16(IWL_RX_MPDU_STATUS_OVERRUN_OK
))) {
821 IWL_DEBUG_RX(mvm
, "Bad CRC or FIFO: 0x%08X.\n",
822 le16_to_cpu(desc
->status
));
823 rx_status
->flag
|= RX_FLAG_FAILED_FCS_CRC
;
825 /* set the preamble flag if appropriate */
826 if (phy_info
& IWL_RX_MPDU_PHY_SHORT_PREAMBLE
)
827 rx_status
->enc_flags
|= RX_ENC_FLAG_SHORTPRE
;
829 if (likely(!(phy_info
& IWL_RX_MPDU_PHY_TSF_OVERLOAD
))) {
830 rx_status
->mactime
= le64_to_cpu(desc
->tsf_on_air_rise
);
831 /* TSF as indicated by the firmware is at INA time */
832 rx_status
->flag
|= RX_FLAG_MACTIME_PLCP_START
;
834 rx_status
->device_timestamp
= le32_to_cpu(desc
->gp2_on_air_rise
);
835 rx_status
->band
= desc
->channel
> 14 ? NL80211_BAND_5GHZ
:
837 rx_status
->freq
= ieee80211_channel_to_frequency(desc
->channel
,
839 iwl_mvm_get_signal_strength(mvm
, desc
, rx_status
);
841 /* update aggregation data for monitor sake on default queue */
842 if (!queue
&& (phy_info
& IWL_RX_MPDU_PHY_AMPDU
)) {
843 bool toggle_bit
= phy_info
& IWL_RX_MPDU_PHY_AMPDU_TOGGLE
;
845 rx_status
->flag
|= RX_FLAG_AMPDU_DETAILS
;
846 rx_status
->ampdu_reference
= mvm
->ampdu_ref
;
847 /* toggle is switched whenever new aggregation starts */
848 if (toggle_bit
!= mvm
->ampdu_toggle
) {
850 mvm
->ampdu_toggle
= toggle_bit
;
856 if (le16_to_cpu(desc
->status
) & IWL_RX_MPDU_STATUS_SRC_STA_FOUND
) {
857 u8 id
= desc
->sta_id_flags
& IWL_RX_MPDU_SIF_STA_ID_MASK
;
859 if (!WARN_ON_ONCE(id
>= ARRAY_SIZE(mvm
->fw_id_to_mac_id
))) {
860 sta
= rcu_dereference(mvm
->fw_id_to_mac_id
[id
]);
864 } else if (!is_multicast_ether_addr(hdr
->addr2
)) {
866 * This is fine since we prevent two stations with the same
867 * address from being added.
869 sta
= ieee80211_find_sta_by_ifaddr(mvm
->hw
, hdr
->addr2
, NULL
);
873 struct iwl_mvm_sta
*mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
874 struct ieee80211_vif
*tx_blocked_vif
=
875 rcu_dereference(mvm
->csa_tx_blocked_vif
);
876 u8 baid
= (u8
)((le32_to_cpu(desc
->reorder_data
) &
877 IWL_RX_MPDU_REORDER_BAID_MASK
) >>
878 IWL_RX_MPDU_REORDER_BAID_SHIFT
);
881 * We have tx blocked stations (with CS bit). If we heard
882 * frames from a blocked station on a new channel we can
885 if (unlikely(tx_blocked_vif
) &&
886 tx_blocked_vif
== mvmsta
->vif
) {
887 struct iwl_mvm_vif
*mvmvif
=
888 iwl_mvm_vif_from_mac80211(tx_blocked_vif
);
890 if (mvmvif
->csa_target_freq
== rx_status
->freq
)
891 iwl_mvm_sta_modify_disable_tx_ap(mvm
, sta
,
895 rs_update_last_rssi(mvm
, &mvmsta
->lq_sta
, rx_status
);
897 if (iwl_fw_dbg_trigger_enabled(mvm
->fw
, FW_DBG_TRIGGER_RSSI
) &&
898 ieee80211_is_beacon(hdr
->frame_control
)) {
899 struct iwl_fw_dbg_trigger_tlv
*trig
;
900 struct iwl_fw_dbg_trigger_low_rssi
*rssi_trig
;
904 trig
= iwl_fw_dbg_get_trigger(mvm
->fw
,
905 FW_DBG_TRIGGER_RSSI
);
906 rssi_trig
= (void *)trig
->data
;
907 rssi
= le32_to_cpu(rssi_trig
->rssi
);
910 iwl_fw_dbg_trigger_check_stop(mvm
, mvmsta
->vif
,
912 if (trig_check
&& rx_status
->signal
< rssi
)
913 iwl_mvm_fw_dbg_collect_trig(mvm
, trig
, NULL
);
916 if (ieee80211_is_data(hdr
->frame_control
))
917 iwl_mvm_rx_csum(sta
, skb
, desc
);
919 if (iwl_mvm_is_nonagg_dup(sta
, queue
, rx_status
, hdr
, desc
)) {
925 * Our hardware de-aggregates AMSDUs but copies the mac header
926 * as it to the de-aggregated MPDUs. We need to turn off the
927 * AMSDU bit in the QoS control ourselves.
928 * In addition, HW reverses addr3 and addr4 - reverse it back.
930 if ((desc
->mac_flags2
& IWL_RX_MPDU_MFLG2_AMSDU
) &&
931 !WARN_ON(!ieee80211_is_data_qos(hdr
->frame_control
))) {
933 u8
*qc
= ieee80211_get_qos_ctl(hdr
);
934 u8 mac_addr
[ETH_ALEN
];
936 *qc
&= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT
;
938 for (i
= 0; i
< ETH_ALEN
; i
++)
939 mac_addr
[i
] = hdr
->addr3
[ETH_ALEN
- i
- 1];
940 ether_addr_copy(hdr
->addr3
, mac_addr
);
942 if (ieee80211_has_a4(hdr
->frame_control
)) {
943 for (i
= 0; i
< ETH_ALEN
; i
++)
945 hdr
->addr4
[ETH_ALEN
- i
- 1];
946 ether_addr_copy(hdr
->addr4
, mac_addr
);
949 if (baid
!= IWL_RX_REORDER_DATA_INVALID_BAID
) {
950 u32 reorder_data
= le32_to_cpu(desc
->reorder_data
);
952 iwl_mvm_agg_rx_received(mvm
, reorder_data
, baid
);
956 /* Set up the HT phy flags */
957 switch (rate_n_flags
& RATE_MCS_CHAN_WIDTH_MSK
) {
958 case RATE_MCS_CHAN_WIDTH_20
:
960 case RATE_MCS_CHAN_WIDTH_40
:
961 rx_status
->bw
= RATE_INFO_BW_40
;
963 case RATE_MCS_CHAN_WIDTH_80
:
964 rx_status
->bw
= RATE_INFO_BW_80
;
966 case RATE_MCS_CHAN_WIDTH_160
:
967 rx_status
->bw
= RATE_INFO_BW_160
;
970 if (rate_n_flags
& RATE_MCS_SGI_MSK
)
971 rx_status
->enc_flags
|= RX_ENC_FLAG_SHORT_GI
;
972 if (rate_n_flags
& RATE_HT_MCS_GF_MSK
)
973 rx_status
->enc_flags
|= RX_ENC_FLAG_HT_GF
;
974 if (rate_n_flags
& RATE_MCS_LDPC_MSK
)
975 rx_status
->enc_flags
|= RX_ENC_FLAG_LDPC
;
976 if (rate_n_flags
& RATE_MCS_HT_MSK
) {
977 u8 stbc
= (rate_n_flags
& RATE_MCS_STBC_MSK
) >>
979 rx_status
->encoding
= RX_ENC_HT
;
980 rx_status
->rate_idx
= rate_n_flags
& RATE_HT_MCS_INDEX_MSK
;
981 rx_status
->enc_flags
|= stbc
<< RX_ENC_FLAG_STBC_SHIFT
;
982 } else if (rate_n_flags
& RATE_MCS_VHT_MSK
) {
983 u8 stbc
= (rate_n_flags
& RATE_MCS_STBC_MSK
) >>
986 ((rate_n_flags
& RATE_VHT_MCS_NSS_MSK
) >>
987 RATE_VHT_MCS_NSS_POS
) + 1;
988 rx_status
->rate_idx
= rate_n_flags
& RATE_VHT_MCS_RATE_CODE_MSK
;
989 rx_status
->encoding
= RX_ENC_VHT
;
990 rx_status
->enc_flags
|= stbc
<< RX_ENC_FLAG_STBC_SHIFT
;
991 if (rate_n_flags
& RATE_MCS_BF_MSK
)
992 rx_status
->enc_flags
|= RX_ENC_FLAG_BF
;
994 int rate
= iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags
,
997 if (WARN(rate
< 0 || rate
> 0xFF,
998 "Invalid rate flags 0x%x, band %d,\n",
999 rate_n_flags
, rx_status
->band
)) {
1003 rx_status
->rate_idx
= rate
;
1007 /* management stuff on default queue */
1009 if (unlikely((ieee80211_is_beacon(hdr
->frame_control
) ||
1010 ieee80211_is_probe_resp(hdr
->frame_control
)) &&
1011 mvm
->sched_scan_pass_all
==
1012 SCHED_SCAN_PASS_ALL_ENABLED
))
1013 mvm
->sched_scan_pass_all
= SCHED_SCAN_PASS_ALL_FOUND
;
1015 if (unlikely(ieee80211_is_beacon(hdr
->frame_control
) ||
1016 ieee80211_is_probe_resp(hdr
->frame_control
)))
1017 rx_status
->boottime_ns
= ktime_get_boot_ns();
1020 iwl_mvm_create_skb(skb
, hdr
, len
, crypt_len
, rxb
);
1021 if (!iwl_mvm_reorder(mvm
, napi
, queue
, sta
, skb
, desc
))
1022 iwl_mvm_pass_packet_to_mac80211(mvm
, napi
, skb
, queue
, sta
);
1027 void iwl_mvm_rx_frame_release(struct iwl_mvm
*mvm
, struct napi_struct
*napi
,
1028 struct iwl_rx_cmd_buffer
*rxb
, int queue
)
1030 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
1031 struct iwl_frame_release
*release
= (void *)pkt
->data
;
1032 struct ieee80211_sta
*sta
;
1033 struct iwl_mvm_reorder_buffer
*reorder_buf
;
1034 struct iwl_mvm_baid_data
*ba_data
;
1036 int baid
= release
->baid
;
1038 IWL_DEBUG_HT(mvm
, "Frame release notification for BAID %u, NSSN %d\n",
1039 release
->baid
, le16_to_cpu(release
->nssn
));
1041 if (WARN_ON_ONCE(baid
== IWL_RX_REORDER_DATA_INVALID_BAID
))
1046 ba_data
= rcu_dereference(mvm
->baid_map
[baid
]);
1047 if (WARN_ON_ONCE(!ba_data
))
1050 sta
= rcu_dereference(mvm
->fw_id_to_mac_id
[ba_data
->sta_id
]);
1051 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta
)))
1054 reorder_buf
= &ba_data
->reorder_buf
[queue
];
1056 spin_lock_bh(&reorder_buf
->lock
);
1057 iwl_mvm_release_frames(mvm
, sta
, napi
, reorder_buf
,
1058 le16_to_cpu(release
->nssn
));
1059 spin_unlock_bh(&reorder_buf
->lock
);