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 skb_put_data(skb
, hdr
, hdrlen
);
187 skb_put_data(skb
, (u8
*)hdr
+ hdrlen
+ pad_len
, headlen
- hdrlen
);
189 fraglen
= len
- headlen
;
192 int offset
= (void *)hdr
+ headlen
+ pad_len
-
193 rxb_addr(rxb
) + rxb_offset(rxb
);
195 skb_add_rx_frag(skb
, 0, rxb_steal_page(rxb
), offset
,
196 fraglen
, rxb
->truesize
);
200 /* iwl_mvm_pass_packet_to_mac80211 - passes the packet for mac80211 */
201 static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm
*mvm
,
202 struct napi_struct
*napi
,
203 struct sk_buff
*skb
, int queue
,
204 struct ieee80211_sta
*sta
)
206 if (iwl_mvm_check_pn(mvm
, skb
, queue
, sta
))
209 ieee80211_rx_napi(mvm
->hw
, sta
, skb
, napi
);
212 static void iwl_mvm_get_signal_strength(struct iwl_mvm
*mvm
,
213 struct iwl_rx_mpdu_desc
*desc
,
214 struct ieee80211_rx_status
*rx_status
)
216 int energy_a
, energy_b
, max_energy
;
218 energy_a
= desc
->energy_a
;
219 energy_a
= energy_a
? -energy_a
: S8_MIN
;
220 energy_b
= desc
->energy_b
;
221 energy_b
= energy_b
? -energy_b
: S8_MIN
;
222 max_energy
= max(energy_a
, energy_b
);
224 IWL_DEBUG_STATS(mvm
, "energy In A %d B %d, and max %d\n",
225 energy_a
, energy_b
, max_energy
);
227 rx_status
->signal
= max_energy
;
228 rx_status
->chains
= 0; /* TODO: phy info */
229 rx_status
->chain_signal
[0] = energy_a
;
230 rx_status
->chain_signal
[1] = energy_b
;
231 rx_status
->chain_signal
[2] = S8_MIN
;
234 static int iwl_mvm_rx_crypto(struct iwl_mvm
*mvm
, struct ieee80211_hdr
*hdr
,
235 struct ieee80211_rx_status
*stats
,
236 struct iwl_rx_mpdu_desc
*desc
, int queue
,
239 u16 status
= le16_to_cpu(desc
->status
);
241 if (!ieee80211_has_protected(hdr
->frame_control
) ||
242 (status
& IWL_RX_MPDU_STATUS_SEC_MASK
) ==
243 IWL_RX_MPDU_STATUS_SEC_NONE
)
246 /* TODO: handle packets encrypted with unknown alg */
248 switch (status
& IWL_RX_MPDU_STATUS_SEC_MASK
) {
249 case IWL_RX_MPDU_STATUS_SEC_CCM
:
250 case IWL_RX_MPDU_STATUS_SEC_GCM
:
251 BUILD_BUG_ON(IEEE80211_CCMP_PN_LEN
!= IEEE80211_GCMP_PN_LEN
);
252 /* alg is CCM: check MIC only */
253 if (!(status
& IWL_RX_MPDU_STATUS_MIC_OK
))
256 stats
->flag
|= RX_FLAG_DECRYPTED
;
257 *crypt_len
= IEEE80211_CCMP_HDR_LEN
;
259 case IWL_RX_MPDU_STATUS_SEC_TKIP
:
260 /* Don't drop the frame and decrypt it in SW */
261 if (!(status
& IWL_RX_MPDU_RES_STATUS_TTAK_OK
))
264 *crypt_len
= IEEE80211_TKIP_IV_LEN
;
265 /* fall through if TTAK OK */
266 case IWL_RX_MPDU_STATUS_SEC_WEP
:
267 if (!(status
& IWL_RX_MPDU_STATUS_ICV_OK
))
270 stats
->flag
|= RX_FLAG_DECRYPTED
;
271 if ((status
& IWL_RX_MPDU_STATUS_SEC_MASK
) ==
272 IWL_RX_MPDU_STATUS_SEC_WEP
)
273 *crypt_len
= IEEE80211_WEP_IV_LEN
;
275 case IWL_RX_MPDU_STATUS_SEC_EXT_ENC
:
276 if (!(status
& IWL_RX_MPDU_STATUS_MIC_OK
))
278 stats
->flag
|= RX_FLAG_DECRYPTED
;
281 IWL_ERR(mvm
, "Unhandled alg: 0x%x\n", status
);
287 static void iwl_mvm_rx_csum(struct ieee80211_sta
*sta
,
289 struct iwl_rx_mpdu_desc
*desc
)
291 struct iwl_mvm_sta
*mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
292 struct iwl_mvm_vif
*mvmvif
= iwl_mvm_vif_from_mac80211(mvmsta
->vif
);
293 u16 flags
= le16_to_cpu(desc
->l3l4_flags
);
294 u8 l3_prot
= (u8
)((flags
& IWL_RX_L3L4_L3_PROTO_MASK
) >>
295 IWL_RX_L3_PROTO_POS
);
297 if (mvmvif
->features
& NETIF_F_RXCSUM
&&
298 flags
& IWL_RX_L3L4_TCP_UDP_CSUM_OK
&&
299 (flags
& IWL_RX_L3L4_IP_HDR_CSUM_OK
||
300 l3_prot
== IWL_RX_L3_TYPE_IPV6
||
301 l3_prot
== IWL_RX_L3_TYPE_IPV6_FRAG
))
302 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
306 * returns true if a packet outside BA session is a duplicate and
309 static bool iwl_mvm_is_nonagg_dup(struct ieee80211_sta
*sta
, int queue
,
310 struct ieee80211_rx_status
*rx_status
,
311 struct ieee80211_hdr
*hdr
,
312 struct iwl_rx_mpdu_desc
*desc
)
314 struct iwl_mvm_sta
*mvm_sta
;
315 struct iwl_mvm_rxq_dup_data
*dup_data
;
316 u8 baid
, tid
, sub_frame_idx
;
318 if (WARN_ON(IS_ERR_OR_NULL(sta
)))
321 baid
= (le32_to_cpu(desc
->reorder_data
) &
322 IWL_RX_MPDU_REORDER_BAID_MASK
) >>
323 IWL_RX_MPDU_REORDER_BAID_SHIFT
;
325 if (baid
!= IWL_RX_REORDER_DATA_INVALID_BAID
)
328 mvm_sta
= iwl_mvm_sta_from_mac80211(sta
);
329 dup_data
= &mvm_sta
->dup_data
[queue
];
332 * Drop duplicate 802.11 retransmissions
333 * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery")
335 if (ieee80211_is_ctl(hdr
->frame_control
) ||
336 ieee80211_is_qos_nullfunc(hdr
->frame_control
) ||
337 is_multicast_ether_addr(hdr
->addr1
)) {
338 rx_status
->flag
|= RX_FLAG_DUP_VALIDATED
;
342 if (ieee80211_is_data_qos(hdr
->frame_control
))
343 /* frame has qos control */
344 tid
= *ieee80211_get_qos_ctl(hdr
) &
345 IEEE80211_QOS_CTL_TID_MASK
;
347 tid
= IWL_MAX_TID_COUNT
;
349 /* If this wasn't a part of an A-MSDU the sub-frame index will be 0 */
350 sub_frame_idx
= desc
->amsdu_info
& IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK
;
352 if (unlikely(ieee80211_has_retry(hdr
->frame_control
) &&
353 dup_data
->last_seq
[tid
] == hdr
->seq_ctrl
&&
354 dup_data
->last_sub_frame
[tid
] >= sub_frame_idx
))
357 dup_data
->last_seq
[tid
] = hdr
->seq_ctrl
;
358 dup_data
->last_sub_frame
[tid
] = sub_frame_idx
;
360 rx_status
->flag
|= RX_FLAG_DUP_VALIDATED
;
365 int iwl_mvm_notify_rx_queue(struct iwl_mvm
*mvm
, u32 rxq_mask
,
366 const u8
*data
, u32 count
)
368 struct iwl_rxq_sync_cmd
*cmd
;
369 u32 data_size
= sizeof(*cmd
) + count
;
372 /* should be DWORD aligned */
373 if (WARN_ON(count
& 3 || count
> IWL_MULTI_QUEUE_SYNC_MSG_MAX_SIZE
))
376 cmd
= kzalloc(data_size
, GFP_KERNEL
);
380 cmd
->rxq_mask
= cpu_to_le32(rxq_mask
);
381 cmd
->count
= cpu_to_le32(count
);
383 memcpy(cmd
->payload
, data
, count
);
385 ret
= iwl_mvm_send_cmd_pdu(mvm
,
386 WIDE_ID(DATA_PATH_GROUP
,
387 TRIGGER_RX_QUEUES_NOTIF_CMD
),
395 * Returns true if sn2 - buffer_size < sn1 < sn2.
396 * To be used only in order to compare reorder buffer head with NSSN.
397 * We fully trust NSSN unless it is behind us due to reorder timeout.
398 * Reorder timeout can only bring us up to buffer_size SNs ahead of NSSN.
400 static bool iwl_mvm_is_sn_less(u16 sn1
, u16 sn2
, u16 buffer_size
)
402 return ieee80211_sn_less(sn1
, sn2
) &&
403 !ieee80211_sn_less(sn1
, sn2
- buffer_size
);
406 #define RX_REORDER_BUF_TIMEOUT_MQ (HZ / 10)
408 static void iwl_mvm_release_frames(struct iwl_mvm
*mvm
,
409 struct ieee80211_sta
*sta
,
410 struct napi_struct
*napi
,
411 struct iwl_mvm_reorder_buffer
*reorder_buf
,
414 u16 ssn
= reorder_buf
->head_sn
;
416 lockdep_assert_held(&reorder_buf
->lock
);
418 /* ignore nssn smaller than head sn - this can happen due to timeout */
419 if (iwl_mvm_is_sn_less(nssn
, ssn
, reorder_buf
->buf_size
))
422 while (iwl_mvm_is_sn_less(ssn
, nssn
, reorder_buf
->buf_size
)) {
423 int index
= ssn
% reorder_buf
->buf_size
;
424 struct sk_buff_head
*skb_list
= &reorder_buf
->entries
[index
];
427 ssn
= ieee80211_sn_inc(ssn
);
430 * Empty the list. Will have more than one frame for A-MSDU.
431 * Empty list is valid as well since nssn indicates frames were
434 while ((skb
= __skb_dequeue(skb_list
))) {
435 iwl_mvm_pass_packet_to_mac80211(mvm
, napi
, skb
,
438 reorder_buf
->num_stored
--;
441 reorder_buf
->head_sn
= nssn
;
444 if (reorder_buf
->num_stored
&& !reorder_buf
->removed
) {
445 u16 index
= reorder_buf
->head_sn
% reorder_buf
->buf_size
;
447 while (skb_queue_empty(&reorder_buf
->entries
[index
]))
448 index
= (index
+ 1) % reorder_buf
->buf_size
;
449 /* modify timer to match next frame's expiration time */
450 mod_timer(&reorder_buf
->reorder_timer
,
451 reorder_buf
->reorder_time
[index
] + 1 +
452 RX_REORDER_BUF_TIMEOUT_MQ
);
454 del_timer(&reorder_buf
->reorder_timer
);
458 void iwl_mvm_reorder_timer_expired(unsigned long data
)
460 struct iwl_mvm_reorder_buffer
*buf
= (void *)data
;
462 u16 sn
= 0, index
= 0;
463 bool expired
= false;
466 spin_lock(&buf
->lock
);
468 if (!buf
->num_stored
|| buf
->removed
) {
469 spin_unlock(&buf
->lock
);
473 for (i
= 0; i
< buf
->buf_size
; i
++) {
474 index
= (buf
->head_sn
+ i
) % buf
->buf_size
;
476 if (skb_queue_empty(&buf
->entries
[index
])) {
478 * If there is a hole and the next frame didn't expire
479 * we want to break and not advance SN
484 if (!cont
&& !time_after(jiffies
, buf
->reorder_time
[index
] +
485 RX_REORDER_BUF_TIMEOUT_MQ
))
489 /* continue until next hole after this expired frames */
491 sn
= ieee80211_sn_add(buf
->head_sn
, i
+ 1);
495 struct ieee80211_sta
*sta
;
498 sta
= rcu_dereference(buf
->mvm
->fw_id_to_mac_id
[buf
->sta_id
]);
499 /* SN is set to the last expired frame + 1 */
500 IWL_DEBUG_HT(buf
->mvm
,
501 "Releasing expired frames for sta %u, sn %d\n",
503 iwl_mvm_release_frames(buf
->mvm
, sta
, NULL
, buf
, sn
);
507 * If no frame expired and there are stored frames, index is now
508 * pointing to the first unexpired frame - modify timer
509 * accordingly to this frame.
511 mod_timer(&buf
->reorder_timer
,
512 buf
->reorder_time
[index
] +
513 1 + RX_REORDER_BUF_TIMEOUT_MQ
);
515 spin_unlock(&buf
->lock
);
518 static void iwl_mvm_del_ba(struct iwl_mvm
*mvm
, int queue
,
519 struct iwl_mvm_delba_data
*data
)
521 struct iwl_mvm_baid_data
*ba_data
;
522 struct ieee80211_sta
*sta
;
523 struct iwl_mvm_reorder_buffer
*reorder_buf
;
524 u8 baid
= data
->baid
;
526 if (WARN_ONCE(baid
>= IWL_MAX_BAID
, "invalid BAID: %x\n", baid
))
531 ba_data
= rcu_dereference(mvm
->baid_map
[baid
]);
532 if (WARN_ON_ONCE(!ba_data
))
535 sta
= rcu_dereference(mvm
->fw_id_to_mac_id
[ba_data
->sta_id
]);
536 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta
)))
539 reorder_buf
= &ba_data
->reorder_buf
[queue
];
541 /* release all frames that are in the reorder buffer to the stack */
542 spin_lock_bh(&reorder_buf
->lock
);
543 iwl_mvm_release_frames(mvm
, sta
, NULL
, reorder_buf
,
544 ieee80211_sn_add(reorder_buf
->head_sn
,
545 reorder_buf
->buf_size
));
546 spin_unlock_bh(&reorder_buf
->lock
);
547 del_timer_sync(&reorder_buf
->reorder_timer
);
553 void iwl_mvm_rx_queue_notif(struct iwl_mvm
*mvm
, struct iwl_rx_cmd_buffer
*rxb
,
556 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
557 struct iwl_rxq_sync_notification
*notif
;
558 struct iwl_mvm_internal_rxq_notif
*internal_notif
;
560 notif
= (void *)pkt
->data
;
561 internal_notif
= (void *)notif
->payload
;
563 if (internal_notif
->sync
) {
564 if (mvm
->queue_sync_cookie
!= internal_notif
->cookie
) {
566 "Received expired RX queue sync message\n");
569 if (!atomic_dec_return(&mvm
->queue_sync_counter
))
570 wake_up(&mvm
->rx_sync_waitq
);
573 switch (internal_notif
->type
) {
574 case IWL_MVM_RXQ_EMPTY
:
576 case IWL_MVM_RXQ_NOTIF_DEL_BA
:
577 iwl_mvm_del_ba(mvm
, queue
, (void *)internal_notif
->data
);
580 WARN_ONCE(1, "Invalid identifier %d", internal_notif
->type
);
585 * Returns true if the MPDU was buffered\dropped, false if it should be passed
588 static bool iwl_mvm_reorder(struct iwl_mvm
*mvm
,
589 struct napi_struct
*napi
,
591 struct ieee80211_sta
*sta
,
593 struct iwl_rx_mpdu_desc
*desc
)
595 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
596 struct iwl_mvm_sta
*mvm_sta
;
597 struct iwl_mvm_baid_data
*baid_data
;
598 struct iwl_mvm_reorder_buffer
*buffer
;
599 struct sk_buff
*tail
;
600 u32 reorder
= le32_to_cpu(desc
->reorder_data
);
601 bool amsdu
= desc
->mac_flags2
& IWL_RX_MPDU_MFLG2_AMSDU
;
603 desc
->amsdu_info
& IWL_RX_MPDU_AMSDU_LAST_SUBFRAME
;
604 u8 tid
= *ieee80211_get_qos_ctl(hdr
) & IEEE80211_QOS_CTL_TID_MASK
;
605 u8 sub_frame_idx
= desc
->amsdu_info
&
606 IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK
;
611 baid
= (reorder
& IWL_RX_MPDU_REORDER_BAID_MASK
) >>
612 IWL_RX_MPDU_REORDER_BAID_SHIFT
;
615 * This also covers the case of receiving a Block Ack Request
616 * outside a BA session; we'll pass it to mac80211 and that
617 * then sends a delBA action frame.
619 if (baid
== IWL_RX_REORDER_DATA_INVALID_BAID
)
623 if (WARN_ON(IS_ERR_OR_NULL(sta
)))
626 mvm_sta
= iwl_mvm_sta_from_mac80211(sta
);
628 /* not a data packet or a bar */
629 if (!ieee80211_is_back_req(hdr
->frame_control
) &&
630 (!ieee80211_is_data_qos(hdr
->frame_control
) ||
631 is_multicast_ether_addr(hdr
->addr1
)))
634 if (unlikely(!ieee80211_is_data_present(hdr
->frame_control
)))
637 baid_data
= rcu_dereference(mvm
->baid_map
[baid
]);
639 WARN(!(reorder
& IWL_RX_MPDU_REORDER_BA_OLD_SN
),
640 "Received baid %d, but no data exists for this BAID\n",
645 if (WARN(tid
!= baid_data
->tid
|| mvm_sta
->sta_id
!= baid_data
->sta_id
,
646 "baid 0x%x is mapped to sta:%d tid:%d, but was received for sta:%d tid:%d\n",
647 baid
, baid_data
->sta_id
, baid_data
->tid
, mvm_sta
->sta_id
,
651 nssn
= reorder
& IWL_RX_MPDU_REORDER_NSSN_MASK
;
652 sn
= (reorder
& IWL_RX_MPDU_REORDER_SN_MASK
) >>
653 IWL_RX_MPDU_REORDER_SN_SHIFT
;
655 buffer
= &baid_data
->reorder_buf
[queue
];
657 spin_lock_bh(&buffer
->lock
);
659 if (!buffer
->valid
) {
660 if (reorder
& IWL_RX_MPDU_REORDER_BA_OLD_SN
) {
661 spin_unlock_bh(&buffer
->lock
);
664 buffer
->valid
= true;
667 if (ieee80211_is_back_req(hdr
->frame_control
)) {
668 iwl_mvm_release_frames(mvm
, sta
, napi
, buffer
, nssn
);
673 * If there was a significant jump in the nssn - adjust.
674 * If the SN is smaller than the NSSN it might need to first go into
675 * the reorder buffer, in which case we just release up to it and the
676 * rest of the function will take of storing it and releasing up to the
679 if (!iwl_mvm_is_sn_less(nssn
, buffer
->head_sn
+ buffer
->buf_size
,
681 u16 min_sn
= ieee80211_sn_less(sn
, nssn
) ? sn
: nssn
;
683 iwl_mvm_release_frames(mvm
, sta
, napi
, buffer
, min_sn
);
686 /* drop any oudated packets */
687 if (ieee80211_sn_less(sn
, buffer
->head_sn
))
690 /* release immediately if allowed by nssn and no stored frames */
691 if (!buffer
->num_stored
&& ieee80211_sn_less(sn
, nssn
)) {
692 if (iwl_mvm_is_sn_less(buffer
->head_sn
, nssn
,
694 (!amsdu
|| last_subframe
))
695 buffer
->head_sn
= nssn
;
696 /* No need to update AMSDU last SN - we are moving the head */
697 spin_unlock_bh(&buffer
->lock
);
701 index
= sn
% buffer
->buf_size
;
704 * Check if we already stored this frame
705 * As AMSDU is either received or not as whole, logic is simple:
706 * If we have frames in that position in the buffer and the last frame
707 * originated from AMSDU had a different SN then it is a retransmission.
708 * If it is the same SN then if the subframe index is incrementing it
709 * is the same AMSDU - otherwise it is a retransmission.
711 tail
= skb_peek_tail(&buffer
->entries
[index
]);
714 else if (tail
&& (sn
!= buffer
->last_amsdu
||
715 buffer
->last_sub_index
>= sub_frame_idx
))
718 /* put in reorder buffer */
719 __skb_queue_tail(&buffer
->entries
[index
], skb
);
720 buffer
->num_stored
++;
721 buffer
->reorder_time
[index
] = jiffies
;
724 buffer
->last_amsdu
= sn
;
725 buffer
->last_sub_index
= sub_frame_idx
;
729 * We cannot trust NSSN for AMSDU sub-frames that are not the last.
730 * The reason is that NSSN advances on the first sub-frame, and may
731 * cause the reorder buffer to advance before all the sub-frames arrive.
732 * Example: reorder buffer contains SN 0 & 2, and we receive AMSDU with
733 * SN 1. NSSN for first sub frame will be 3 with the result of driver
734 * releasing SN 0,1, 2. When sub-frame 1 arrives - reorder buffer is
735 * already ahead and it will be dropped.
736 * If the last sub-frame is not on this queue - we will get frame
737 * release notification with up to date NSSN.
739 if (!amsdu
|| last_subframe
)
740 iwl_mvm_release_frames(mvm
, sta
, napi
, buffer
, nssn
);
742 spin_unlock_bh(&buffer
->lock
);
747 spin_unlock_bh(&buffer
->lock
);
751 static void iwl_mvm_agg_rx_received(struct iwl_mvm
*mvm
,
752 u32 reorder_data
, u8 baid
)
754 unsigned long now
= jiffies
;
755 unsigned long timeout
;
756 struct iwl_mvm_baid_data
*data
;
760 data
= rcu_dereference(mvm
->baid_map
[baid
]);
762 WARN_ON(!(reorder_data
& IWL_RX_MPDU_REORDER_BA_OLD_SN
));
769 timeout
= data
->timeout
;
771 * Do not update last rx all the time to avoid cache bouncing
772 * between the rx queues.
773 * Update it every timeout. Worst case is the session will
774 * expire after ~ 2 * timeout, which doesn't matter that much.
776 if (time_before(data
->last_rx
+ TU_TO_JIFFIES(timeout
), now
))
777 /* Update is atomic */
784 void iwl_mvm_rx_mpdu_mq(struct iwl_mvm
*mvm
, struct napi_struct
*napi
,
785 struct iwl_rx_cmd_buffer
*rxb
, int queue
)
787 struct ieee80211_rx_status
*rx_status
;
788 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
789 struct iwl_rx_mpdu_desc
*desc
= (void *)pkt
->data
;
790 struct ieee80211_hdr
*hdr
= (void *)(pkt
->data
+ sizeof(*desc
));
791 u32 len
= le16_to_cpu(desc
->mpdu_len
);
792 u32 rate_n_flags
= le32_to_cpu(desc
->rate_n_flags
);
793 u16 phy_info
= le16_to_cpu(desc
->phy_info
);
794 struct ieee80211_sta
*sta
= NULL
;
798 /* Dont use dev_alloc_skb(), we'll have enough headroom once
799 * ieee80211_hdr pulled.
801 skb
= alloc_skb(128, GFP_ATOMIC
);
803 IWL_ERR(mvm
, "alloc_skb failed\n");
807 rx_status
= IEEE80211_SKB_RXCB(skb
);
809 if (iwl_mvm_rx_crypto(mvm
, hdr
, rx_status
, desc
, queue
, &crypt_len
)) {
815 * Keep packets with CRC errors (and with overrun) for monitor mode
816 * (otherwise the firmware discards them) but mark them as bad.
818 if (!(desc
->status
& cpu_to_le16(IWL_RX_MPDU_STATUS_CRC_OK
)) ||
819 !(desc
->status
& cpu_to_le16(IWL_RX_MPDU_STATUS_OVERRUN_OK
))) {
820 IWL_DEBUG_RX(mvm
, "Bad CRC or FIFO: 0x%08X.\n",
821 le16_to_cpu(desc
->status
));
822 rx_status
->flag
|= RX_FLAG_FAILED_FCS_CRC
;
824 /* set the preamble flag if appropriate */
825 if (phy_info
& IWL_RX_MPDU_PHY_SHORT_PREAMBLE
)
826 rx_status
->enc_flags
|= RX_ENC_FLAG_SHORTPRE
;
828 if (likely(!(phy_info
& IWL_RX_MPDU_PHY_TSF_OVERLOAD
))) {
829 rx_status
->mactime
= le64_to_cpu(desc
->tsf_on_air_rise
);
830 /* TSF as indicated by the firmware is at INA time */
831 rx_status
->flag
|= RX_FLAG_MACTIME_PLCP_START
;
833 rx_status
->device_timestamp
= le32_to_cpu(desc
->gp2_on_air_rise
);
834 rx_status
->band
= desc
->channel
> 14 ? NL80211_BAND_5GHZ
:
836 rx_status
->freq
= ieee80211_channel_to_frequency(desc
->channel
,
838 iwl_mvm_get_signal_strength(mvm
, desc
, rx_status
);
840 /* update aggregation data for monitor sake on default queue */
841 if (!queue
&& (phy_info
& IWL_RX_MPDU_PHY_AMPDU
)) {
842 bool toggle_bit
= phy_info
& IWL_RX_MPDU_PHY_AMPDU_TOGGLE
;
844 rx_status
->flag
|= RX_FLAG_AMPDU_DETAILS
;
845 rx_status
->ampdu_reference
= mvm
->ampdu_ref
;
846 /* toggle is switched whenever new aggregation starts */
847 if (toggle_bit
!= mvm
->ampdu_toggle
) {
849 mvm
->ampdu_toggle
= toggle_bit
;
855 if (le16_to_cpu(desc
->status
) & IWL_RX_MPDU_STATUS_SRC_STA_FOUND
) {
856 u8 id
= desc
->sta_id_flags
& IWL_RX_MPDU_SIF_STA_ID_MASK
;
858 if (!WARN_ON_ONCE(id
>= ARRAY_SIZE(mvm
->fw_id_to_mac_id
))) {
859 sta
= rcu_dereference(mvm
->fw_id_to_mac_id
[id
]);
863 } else if (!is_multicast_ether_addr(hdr
->addr2
)) {
865 * This is fine since we prevent two stations with the same
866 * address from being added.
868 sta
= ieee80211_find_sta_by_ifaddr(mvm
->hw
, hdr
->addr2
, NULL
);
872 struct iwl_mvm_sta
*mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
873 struct ieee80211_vif
*tx_blocked_vif
=
874 rcu_dereference(mvm
->csa_tx_blocked_vif
);
875 u8 baid
= (u8
)((le32_to_cpu(desc
->reorder_data
) &
876 IWL_RX_MPDU_REORDER_BAID_MASK
) >>
877 IWL_RX_MPDU_REORDER_BAID_SHIFT
);
880 * We have tx blocked stations (with CS bit). If we heard
881 * frames from a blocked station on a new channel we can
884 if (unlikely(tx_blocked_vif
) &&
885 tx_blocked_vif
== mvmsta
->vif
) {
886 struct iwl_mvm_vif
*mvmvif
=
887 iwl_mvm_vif_from_mac80211(tx_blocked_vif
);
889 if (mvmvif
->csa_target_freq
== rx_status
->freq
)
890 iwl_mvm_sta_modify_disable_tx_ap(mvm
, sta
,
894 rs_update_last_rssi(mvm
, &mvmsta
->lq_sta
, rx_status
);
896 if (iwl_fw_dbg_trigger_enabled(mvm
->fw
, FW_DBG_TRIGGER_RSSI
) &&
897 ieee80211_is_beacon(hdr
->frame_control
)) {
898 struct iwl_fw_dbg_trigger_tlv
*trig
;
899 struct iwl_fw_dbg_trigger_low_rssi
*rssi_trig
;
903 trig
= iwl_fw_dbg_get_trigger(mvm
->fw
,
904 FW_DBG_TRIGGER_RSSI
);
905 rssi_trig
= (void *)trig
->data
;
906 rssi
= le32_to_cpu(rssi_trig
->rssi
);
909 iwl_fw_dbg_trigger_check_stop(mvm
, mvmsta
->vif
,
911 if (trig_check
&& rx_status
->signal
< rssi
)
912 iwl_mvm_fw_dbg_collect_trig(mvm
, trig
, NULL
);
915 if (ieee80211_is_data(hdr
->frame_control
))
916 iwl_mvm_rx_csum(sta
, skb
, desc
);
918 if (iwl_mvm_is_nonagg_dup(sta
, queue
, rx_status
, hdr
, desc
)) {
924 * Our hardware de-aggregates AMSDUs but copies the mac header
925 * as it to the de-aggregated MPDUs. We need to turn off the
926 * AMSDU bit in the QoS control ourselves.
927 * In addition, HW reverses addr3 and addr4 - reverse it back.
929 if ((desc
->mac_flags2
& IWL_RX_MPDU_MFLG2_AMSDU
) &&
930 !WARN_ON(!ieee80211_is_data_qos(hdr
->frame_control
))) {
932 u8
*qc
= ieee80211_get_qos_ctl(hdr
);
933 u8 mac_addr
[ETH_ALEN
];
935 *qc
&= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT
;
937 for (i
= 0; i
< ETH_ALEN
; i
++)
938 mac_addr
[i
] = hdr
->addr3
[ETH_ALEN
- i
- 1];
939 ether_addr_copy(hdr
->addr3
, mac_addr
);
941 if (ieee80211_has_a4(hdr
->frame_control
)) {
942 for (i
= 0; i
< ETH_ALEN
; i
++)
944 hdr
->addr4
[ETH_ALEN
- i
- 1];
945 ether_addr_copy(hdr
->addr4
, mac_addr
);
948 if (baid
!= IWL_RX_REORDER_DATA_INVALID_BAID
) {
949 u32 reorder_data
= le32_to_cpu(desc
->reorder_data
);
951 iwl_mvm_agg_rx_received(mvm
, reorder_data
, baid
);
955 /* Set up the HT phy flags */
956 switch (rate_n_flags
& RATE_MCS_CHAN_WIDTH_MSK
) {
957 case RATE_MCS_CHAN_WIDTH_20
:
959 case RATE_MCS_CHAN_WIDTH_40
:
960 rx_status
->bw
= RATE_INFO_BW_40
;
962 case RATE_MCS_CHAN_WIDTH_80
:
963 rx_status
->bw
= RATE_INFO_BW_80
;
965 case RATE_MCS_CHAN_WIDTH_160
:
966 rx_status
->bw
= RATE_INFO_BW_160
;
969 if (rate_n_flags
& RATE_MCS_SGI_MSK
)
970 rx_status
->enc_flags
|= RX_ENC_FLAG_SHORT_GI
;
971 if (rate_n_flags
& RATE_HT_MCS_GF_MSK
)
972 rx_status
->enc_flags
|= RX_ENC_FLAG_HT_GF
;
973 if (rate_n_flags
& RATE_MCS_LDPC_MSK
)
974 rx_status
->enc_flags
|= RX_ENC_FLAG_LDPC
;
975 if (rate_n_flags
& RATE_MCS_HT_MSK
) {
976 u8 stbc
= (rate_n_flags
& RATE_MCS_STBC_MSK
) >>
978 rx_status
->encoding
= RX_ENC_HT
;
979 rx_status
->rate_idx
= rate_n_flags
& RATE_HT_MCS_INDEX_MSK
;
980 rx_status
->enc_flags
|= stbc
<< RX_ENC_FLAG_STBC_SHIFT
;
981 } else if (rate_n_flags
& RATE_MCS_VHT_MSK
) {
982 u8 stbc
= (rate_n_flags
& RATE_MCS_STBC_MSK
) >>
985 ((rate_n_flags
& RATE_VHT_MCS_NSS_MSK
) >>
986 RATE_VHT_MCS_NSS_POS
) + 1;
987 rx_status
->rate_idx
= rate_n_flags
& RATE_VHT_MCS_RATE_CODE_MSK
;
988 rx_status
->encoding
= RX_ENC_VHT
;
989 rx_status
->enc_flags
|= stbc
<< RX_ENC_FLAG_STBC_SHIFT
;
990 if (rate_n_flags
& RATE_MCS_BF_MSK
)
991 rx_status
->enc_flags
|= RX_ENC_FLAG_BF
;
993 int rate
= iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags
,
996 if (WARN(rate
< 0 || rate
> 0xFF,
997 "Invalid rate flags 0x%x, band %d,\n",
998 rate_n_flags
, rx_status
->band
)) {
1002 rx_status
->rate_idx
= rate
;
1006 /* management stuff on default queue */
1008 if (unlikely((ieee80211_is_beacon(hdr
->frame_control
) ||
1009 ieee80211_is_probe_resp(hdr
->frame_control
)) &&
1010 mvm
->sched_scan_pass_all
==
1011 SCHED_SCAN_PASS_ALL_ENABLED
))
1012 mvm
->sched_scan_pass_all
= SCHED_SCAN_PASS_ALL_FOUND
;
1014 if (unlikely(ieee80211_is_beacon(hdr
->frame_control
) ||
1015 ieee80211_is_probe_resp(hdr
->frame_control
)))
1016 rx_status
->boottime_ns
= ktime_get_boot_ns();
1019 iwl_mvm_create_skb(skb
, hdr
, len
, crypt_len
, rxb
);
1020 if (!iwl_mvm_reorder(mvm
, napi
, queue
, sta
, skb
, desc
))
1021 iwl_mvm_pass_packet_to_mac80211(mvm
, napi
, skb
, queue
, sta
);
1026 void iwl_mvm_rx_frame_release(struct iwl_mvm
*mvm
, struct napi_struct
*napi
,
1027 struct iwl_rx_cmd_buffer
*rxb
, int queue
)
1029 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
1030 struct iwl_frame_release
*release
= (void *)pkt
->data
;
1031 struct ieee80211_sta
*sta
;
1032 struct iwl_mvm_reorder_buffer
*reorder_buf
;
1033 struct iwl_mvm_baid_data
*ba_data
;
1035 int baid
= release
->baid
;
1037 IWL_DEBUG_HT(mvm
, "Frame release notification for BAID %u, NSSN %d\n",
1038 release
->baid
, le16_to_cpu(release
->nssn
));
1040 if (WARN_ON_ONCE(baid
== IWL_RX_REORDER_DATA_INVALID_BAID
))
1045 ba_data
= rcu_dereference(mvm
->baid_map
[baid
]);
1046 if (WARN_ON_ONCE(!ba_data
))
1049 sta
= rcu_dereference(mvm
->fw_id_to_mac_id
[ba_data
->sta_id
]);
1050 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta
)))
1053 reorder_buf
= &ba_data
->reorder_buf
[queue
];
1055 spin_lock_bh(&reorder_buf
->lock
);
1056 iwl_mvm_release_frames(mvm
, sta
, napi
, reorder_buf
,
1057 le16_to_cpu(release
->nssn
));
1058 spin_unlock_bh(&reorder_buf
->lock
);