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 - 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 * 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 - 2016 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 memcpy(ptk_pn
->q
[queue
].pn
[tid
], pn
, IEEE80211_CCMP_PN_LEN
);
136 stats
->flag
|= RX_FLAG_PN_VALIDATED
;
141 /* iwl_mvm_create_skb Adds the rxb to a new skb */
142 static void iwl_mvm_create_skb(struct sk_buff
*skb
, struct ieee80211_hdr
*hdr
,
143 u16 len
, u8 crypt_len
,
144 struct iwl_rx_cmd_buffer
*rxb
)
146 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
147 struct iwl_rx_mpdu_desc
*desc
= (void *)pkt
->data
;
148 unsigned int headlen
, fraglen
, pad_len
= 0;
149 unsigned int hdrlen
= ieee80211_hdrlen(hdr
->frame_control
);
151 if (desc
->mac_flags2
& IWL_RX_MPDU_MFLG2_PAD
)
155 /* If frame is small enough to fit in skb->head, pull it completely.
156 * If not, only pull ieee80211_hdr (including crypto if present, and
157 * an additional 8 bytes for SNAP/ethertype, see below) so that
158 * splice() or TCP coalesce are more efficient.
160 * Since, in addition, ieee80211_data_to_8023() always pull in at
161 * least 8 bytes (possibly more for mesh) we can do the same here
162 * to save the cost of doing it later. That still doesn't pull in
163 * the actual IP header since the typical case has a SNAP header.
164 * If the latter changes (there are efforts in the standards group
165 * to do so) we should revisit this and ieee80211_data_to_8023().
167 headlen
= (len
<= skb_tailroom(skb
)) ? len
:
168 hdrlen
+ crypt_len
+ 8;
170 /* The firmware may align the packet to DWORD.
171 * The padding is inserted after the IV.
172 * After copying the header + IV skip the padding if
173 * present before copying packet data.
176 memcpy(skb_put(skb
, hdrlen
), hdr
, hdrlen
);
177 memcpy(skb_put(skb
, headlen
- hdrlen
), (u8
*)hdr
+ hdrlen
+ pad_len
,
180 fraglen
= len
- headlen
;
183 int offset
= (void *)hdr
+ headlen
+ pad_len
-
184 rxb_addr(rxb
) + rxb_offset(rxb
);
186 skb_add_rx_frag(skb
, 0, rxb_steal_page(rxb
), offset
,
187 fraglen
, rxb
->truesize
);
191 /* iwl_mvm_pass_packet_to_mac80211 - passes the packet for mac80211 */
192 static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm
*mvm
,
193 struct napi_struct
*napi
,
194 struct sk_buff
*skb
, int queue
,
195 struct ieee80211_sta
*sta
)
197 if (iwl_mvm_check_pn(mvm
, skb
, queue
, sta
))
200 ieee80211_rx_napi(mvm
->hw
, sta
, skb
, napi
);
203 static void iwl_mvm_get_signal_strength(struct iwl_mvm
*mvm
,
204 struct iwl_rx_mpdu_desc
*desc
,
205 struct ieee80211_rx_status
*rx_status
)
207 int energy_a
, energy_b
, max_energy
;
209 energy_a
= desc
->energy_a
;
210 energy_a
= energy_a
? -energy_a
: S8_MIN
;
211 energy_b
= desc
->energy_b
;
212 energy_b
= energy_b
? -energy_b
: S8_MIN
;
213 max_energy
= max(energy_a
, energy_b
);
215 IWL_DEBUG_STATS(mvm
, "energy In A %d B %d, and max %d\n",
216 energy_a
, energy_b
, max_energy
);
218 rx_status
->signal
= max_energy
;
219 rx_status
->chains
= 0; /* TODO: phy info */
220 rx_status
->chain_signal
[0] = energy_a
;
221 rx_status
->chain_signal
[1] = energy_b
;
222 rx_status
->chain_signal
[2] = S8_MIN
;
225 static int iwl_mvm_rx_crypto(struct iwl_mvm
*mvm
, struct ieee80211_hdr
*hdr
,
226 struct ieee80211_rx_status
*stats
,
227 struct iwl_rx_mpdu_desc
*desc
, int queue
,
230 u16 status
= le16_to_cpu(desc
->status
);
232 if (!ieee80211_has_protected(hdr
->frame_control
) ||
233 (status
& IWL_RX_MPDU_STATUS_SEC_MASK
) ==
234 IWL_RX_MPDU_STATUS_SEC_NONE
)
237 /* TODO: handle packets encrypted with unknown alg */
239 switch (status
& IWL_RX_MPDU_STATUS_SEC_MASK
) {
240 case IWL_RX_MPDU_STATUS_SEC_CCM
:
241 case IWL_RX_MPDU_STATUS_SEC_GCM
:
242 BUILD_BUG_ON(IEEE80211_CCMP_PN_LEN
!= IEEE80211_GCMP_PN_LEN
);
243 /* alg is CCM: check MIC only */
244 if (!(status
& IWL_RX_MPDU_STATUS_MIC_OK
))
247 stats
->flag
|= RX_FLAG_DECRYPTED
;
248 *crypt_len
= IEEE80211_CCMP_HDR_LEN
;
250 case IWL_RX_MPDU_STATUS_SEC_TKIP
:
251 /* Don't drop the frame and decrypt it in SW */
252 if (!(status
& IWL_RX_MPDU_RES_STATUS_TTAK_OK
))
255 *crypt_len
= IEEE80211_TKIP_IV_LEN
;
256 /* fall through if TTAK OK */
257 case IWL_RX_MPDU_STATUS_SEC_WEP
:
258 if (!(status
& IWL_RX_MPDU_STATUS_ICV_OK
))
261 stats
->flag
|= RX_FLAG_DECRYPTED
;
262 if ((status
& IWL_RX_MPDU_STATUS_SEC_MASK
) ==
263 IWL_RX_MPDU_STATUS_SEC_WEP
)
264 *crypt_len
= IEEE80211_WEP_IV_LEN
;
266 case IWL_RX_MPDU_STATUS_SEC_EXT_ENC
:
267 if (!(status
& IWL_RX_MPDU_STATUS_MIC_OK
))
269 stats
->flag
|= RX_FLAG_DECRYPTED
;
272 IWL_ERR(mvm
, "Unhandled alg: 0x%x\n", status
);
278 static void iwl_mvm_rx_csum(struct ieee80211_sta
*sta
,
280 struct iwl_rx_mpdu_desc
*desc
)
282 struct iwl_mvm_sta
*mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
283 struct iwl_mvm_vif
*mvmvif
= iwl_mvm_vif_from_mac80211(mvmsta
->vif
);
284 u16 flags
= le16_to_cpu(desc
->l3l4_flags
);
285 u8 l3_prot
= (u8
)((flags
& IWL_RX_L3L4_L3_PROTO_MASK
) >>
286 IWL_RX_L3_PROTO_POS
);
288 if (mvmvif
->features
& NETIF_F_RXCSUM
&&
289 flags
& IWL_RX_L3L4_TCP_UDP_CSUM_OK
&&
290 (flags
& IWL_RX_L3L4_IP_HDR_CSUM_OK
||
291 l3_prot
== IWL_RX_L3_TYPE_IPV6
||
292 l3_prot
== IWL_RX_L3_TYPE_IPV6_FRAG
))
293 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
297 * returns true if a packet outside BA session is a duplicate and
300 static bool iwl_mvm_is_nonagg_dup(struct ieee80211_sta
*sta
, int queue
,
301 struct ieee80211_rx_status
*rx_status
,
302 struct ieee80211_hdr
*hdr
,
303 struct iwl_rx_mpdu_desc
*desc
)
305 struct iwl_mvm_sta
*mvm_sta
;
306 struct iwl_mvm_rxq_dup_data
*dup_data
;
307 u8 baid
, tid
, sub_frame_idx
;
309 if (WARN_ON(IS_ERR_OR_NULL(sta
)))
312 baid
= (le32_to_cpu(desc
->reorder_data
) &
313 IWL_RX_MPDU_REORDER_BAID_MASK
) >>
314 IWL_RX_MPDU_REORDER_BAID_SHIFT
;
316 if (baid
!= IWL_RX_REORDER_DATA_INVALID_BAID
)
319 mvm_sta
= iwl_mvm_sta_from_mac80211(sta
);
320 dup_data
= &mvm_sta
->dup_data
[queue
];
323 * Drop duplicate 802.11 retransmissions
324 * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery")
326 if (ieee80211_is_ctl(hdr
->frame_control
) ||
327 ieee80211_is_qos_nullfunc(hdr
->frame_control
) ||
328 is_multicast_ether_addr(hdr
->addr1
)) {
329 rx_status
->flag
|= RX_FLAG_DUP_VALIDATED
;
333 if (ieee80211_is_data_qos(hdr
->frame_control
))
334 /* frame has qos control */
335 tid
= *ieee80211_get_qos_ctl(hdr
) &
336 IEEE80211_QOS_CTL_TID_MASK
;
338 tid
= IWL_MAX_TID_COUNT
;
340 /* If this wasn't a part of an A-MSDU the sub-frame index will be 0 */
341 sub_frame_idx
= desc
->amsdu_info
& IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK
;
343 if (unlikely(ieee80211_has_retry(hdr
->frame_control
) &&
344 dup_data
->last_seq
[tid
] == hdr
->seq_ctrl
&&
345 dup_data
->last_sub_frame
[tid
] >= sub_frame_idx
))
348 dup_data
->last_seq
[tid
] = hdr
->seq_ctrl
;
349 dup_data
->last_sub_frame
[tid
] = sub_frame_idx
;
351 rx_status
->flag
|= RX_FLAG_DUP_VALIDATED
;
356 int iwl_mvm_notify_rx_queue(struct iwl_mvm
*mvm
, u32 rxq_mask
,
357 const u8
*data
, u32 count
)
359 struct iwl_rxq_sync_cmd
*cmd
;
360 u32 data_size
= sizeof(*cmd
) + count
;
363 /* should be DWORD aligned */
364 if (WARN_ON(count
& 3 || count
> IWL_MULTI_QUEUE_SYNC_MSG_MAX_SIZE
))
367 cmd
= kzalloc(data_size
, GFP_KERNEL
);
371 cmd
->rxq_mask
= cpu_to_le32(rxq_mask
);
372 cmd
->count
= cpu_to_le32(count
);
374 memcpy(cmd
->payload
, data
, count
);
376 ret
= iwl_mvm_send_cmd_pdu(mvm
,
377 WIDE_ID(DATA_PATH_GROUP
,
378 TRIGGER_RX_QUEUES_NOTIF_CMD
),
386 * Returns true if sn2 - buffer_size < sn1 < sn2.
387 * To be used only in order to compare reorder buffer head with NSSN.
388 * We fully trust NSSN unless it is behind us due to reorder timeout.
389 * Reorder timeout can only bring us up to buffer_size SNs ahead of NSSN.
391 static bool iwl_mvm_is_sn_less(u16 sn1
, u16 sn2
, u16 buffer_size
)
393 return ieee80211_sn_less(sn1
, sn2
) &&
394 !ieee80211_sn_less(sn1
, sn2
- buffer_size
);
397 #define RX_REORDER_BUF_TIMEOUT_MQ (HZ / 10)
399 static void iwl_mvm_release_frames(struct iwl_mvm
*mvm
,
400 struct ieee80211_sta
*sta
,
401 struct napi_struct
*napi
,
402 struct iwl_mvm_reorder_buffer
*reorder_buf
,
405 u16 ssn
= reorder_buf
->head_sn
;
407 lockdep_assert_held(&reorder_buf
->lock
);
409 /* ignore nssn smaller than head sn - this can happen due to timeout */
410 if (iwl_mvm_is_sn_less(nssn
, ssn
, reorder_buf
->buf_size
))
413 while (iwl_mvm_is_sn_less(ssn
, nssn
, reorder_buf
->buf_size
)) {
414 int index
= ssn
% reorder_buf
->buf_size
;
415 struct sk_buff_head
*skb_list
= &reorder_buf
->entries
[index
];
418 ssn
= ieee80211_sn_inc(ssn
);
420 /* holes are valid since nssn indicates frames were received. */
421 if (skb_queue_empty(skb_list
) || !skb_peek_tail(skb_list
))
423 /* Empty the list. Will have more than one frame for A-MSDU */
424 while ((skb
= __skb_dequeue(skb_list
))) {
425 iwl_mvm_pass_packet_to_mac80211(mvm
, napi
, skb
,
428 reorder_buf
->num_stored
--;
431 reorder_buf
->head_sn
= nssn
;
433 if (reorder_buf
->num_stored
&& !reorder_buf
->removed
) {
434 u16 index
= reorder_buf
->head_sn
% reorder_buf
->buf_size
;
436 while (!skb_peek_tail(&reorder_buf
->entries
[index
]))
437 index
= (index
+ 1) % reorder_buf
->buf_size
;
438 /* modify timer to match next frame's expiration time */
439 mod_timer(&reorder_buf
->reorder_timer
,
440 reorder_buf
->reorder_time
[index
] + 1 +
441 RX_REORDER_BUF_TIMEOUT_MQ
);
443 del_timer(&reorder_buf
->reorder_timer
);
447 void iwl_mvm_reorder_timer_expired(unsigned long data
)
449 struct iwl_mvm_reorder_buffer
*buf
= (void *)data
;
451 u16 sn
= 0, index
= 0;
452 bool expired
= false;
454 spin_lock_bh(&buf
->lock
);
456 if (!buf
->num_stored
|| buf
->removed
) {
457 spin_unlock_bh(&buf
->lock
);
461 for (i
= 0; i
< buf
->buf_size
; i
++) {
462 index
= (buf
->head_sn
+ i
) % buf
->buf_size
;
464 if (!skb_peek_tail(&buf
->entries
[index
]))
466 if (!time_after(jiffies
, buf
->reorder_time
[index
] +
467 RX_REORDER_BUF_TIMEOUT_MQ
))
470 sn
= ieee80211_sn_add(buf
->head_sn
, i
+ 1);
474 struct ieee80211_sta
*sta
;
477 sta
= rcu_dereference(buf
->mvm
->fw_id_to_mac_id
[buf
->sta_id
]);
478 /* SN is set to the last expired frame + 1 */
479 IWL_DEBUG_HT(buf
->mvm
,
480 "Releasing expired frames for sta %u, sn %d\n",
482 iwl_mvm_release_frames(buf
->mvm
, sta
, NULL
, buf
, sn
);
484 } else if (buf
->num_stored
) {
486 * If no frame expired and there are stored frames, index is now
487 * pointing to the first unexpired frame - modify timer
488 * accordingly to this frame.
490 mod_timer(&buf
->reorder_timer
,
491 buf
->reorder_time
[index
] +
492 1 + RX_REORDER_BUF_TIMEOUT_MQ
);
494 spin_unlock_bh(&buf
->lock
);
497 static void iwl_mvm_del_ba(struct iwl_mvm
*mvm
, int queue
,
498 struct iwl_mvm_delba_data
*data
)
500 struct iwl_mvm_baid_data
*ba_data
;
501 struct ieee80211_sta
*sta
;
502 struct iwl_mvm_reorder_buffer
*reorder_buf
;
503 u8 baid
= data
->baid
;
505 if (WARN_ON_ONCE(baid
>= IWL_RX_REORDER_DATA_INVALID_BAID
))
510 ba_data
= rcu_dereference(mvm
->baid_map
[baid
]);
511 if (WARN_ON_ONCE(!ba_data
))
514 sta
= rcu_dereference(mvm
->fw_id_to_mac_id
[ba_data
->sta_id
]);
515 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta
)))
518 reorder_buf
= &ba_data
->reorder_buf
[queue
];
520 /* release all frames that are in the reorder buffer to the stack */
521 spin_lock_bh(&reorder_buf
->lock
);
522 iwl_mvm_release_frames(mvm
, sta
, NULL
, reorder_buf
,
523 ieee80211_sn_add(reorder_buf
->head_sn
,
524 reorder_buf
->buf_size
));
525 spin_unlock_bh(&reorder_buf
->lock
);
526 del_timer_sync(&reorder_buf
->reorder_timer
);
532 void iwl_mvm_rx_queue_notif(struct iwl_mvm
*mvm
, struct iwl_rx_cmd_buffer
*rxb
,
535 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
536 struct iwl_rxq_sync_notification
*notif
;
537 struct iwl_mvm_internal_rxq_notif
*internal_notif
;
539 notif
= (void *)pkt
->data
;
540 internal_notif
= (void *)notif
->payload
;
542 if (internal_notif
->sync
) {
543 if (mvm
->queue_sync_cookie
!= internal_notif
->cookie
) {
545 "Received expired RX queue sync message\n");
548 atomic_dec(&mvm
->queue_sync_counter
);
551 switch (internal_notif
->type
) {
552 case IWL_MVM_RXQ_EMPTY
:
554 case IWL_MVM_RXQ_NOTIF_DEL_BA
:
555 iwl_mvm_del_ba(mvm
, queue
, (void *)internal_notif
->data
);
558 WARN_ONCE(1, "Invalid identifier %d", internal_notif
->type
);
563 * Returns true if the MPDU was buffered\dropped, false if it should be passed
566 static bool iwl_mvm_reorder(struct iwl_mvm
*mvm
,
567 struct napi_struct
*napi
,
569 struct ieee80211_sta
*sta
,
571 struct iwl_rx_mpdu_desc
*desc
)
573 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
574 struct iwl_mvm_sta
*mvm_sta
;
575 struct iwl_mvm_baid_data
*baid_data
;
576 struct iwl_mvm_reorder_buffer
*buffer
;
577 struct sk_buff
*tail
;
578 u32 reorder
= le32_to_cpu(desc
->reorder_data
);
579 bool amsdu
= desc
->mac_flags2
& IWL_RX_MPDU_MFLG2_AMSDU
;
581 desc
->amsdu_info
& IWL_RX_MPDU_AMSDU_LAST_SUBFRAME
;
582 u8 tid
= *ieee80211_get_qos_ctl(hdr
) & IEEE80211_QOS_CTL_TID_MASK
;
583 u8 sub_frame_idx
= desc
->amsdu_info
&
584 IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK
;
589 baid
= (reorder
& IWL_RX_MPDU_REORDER_BAID_MASK
) >>
590 IWL_RX_MPDU_REORDER_BAID_SHIFT
;
592 if (baid
== IWL_RX_REORDER_DATA_INVALID_BAID
)
596 if (WARN_ON(IS_ERR_OR_NULL(sta
)))
599 mvm_sta
= iwl_mvm_sta_from_mac80211(sta
);
601 /* not a data packet */
602 if (!ieee80211_is_data_qos(hdr
->frame_control
) ||
603 is_multicast_ether_addr(hdr
->addr1
))
606 if (unlikely(!ieee80211_is_data_present(hdr
->frame_control
)))
609 baid_data
= rcu_dereference(mvm
->baid_map
[baid
]);
611 "Received baid %d, but no data exists for this BAID\n", baid
))
613 if (WARN(tid
!= baid_data
->tid
|| mvm_sta
->sta_id
!= baid_data
->sta_id
,
614 "baid 0x%x is mapped to sta:%d tid:%d, but was received for sta:%d tid:%d\n",
615 baid
, baid_data
->sta_id
, baid_data
->tid
, mvm_sta
->sta_id
,
619 nssn
= reorder
& IWL_RX_MPDU_REORDER_NSSN_MASK
;
620 sn
= (reorder
& IWL_RX_MPDU_REORDER_SN_MASK
) >>
621 IWL_RX_MPDU_REORDER_SN_SHIFT
;
623 buffer
= &baid_data
->reorder_buf
[queue
];
625 spin_lock_bh(&buffer
->lock
);
628 * If there was a significant jump in the nssn - adjust.
629 * If the SN is smaller than the NSSN it might need to first go into
630 * the reorder buffer, in which case we just release up to it and the
631 * rest of the function will take of storing it and releasing up to the
634 if (!iwl_mvm_is_sn_less(nssn
, buffer
->head_sn
+ buffer
->buf_size
,
636 u16 min_sn
= ieee80211_sn_less(sn
, nssn
) ? sn
: nssn
;
638 iwl_mvm_release_frames(mvm
, sta
, napi
, buffer
, min_sn
);
641 /* drop any oudated packets */
642 if (ieee80211_sn_less(sn
, buffer
->head_sn
))
645 /* release immediately if allowed by nssn and no stored frames */
646 if (!buffer
->num_stored
&& ieee80211_sn_less(sn
, nssn
)) {
647 if (iwl_mvm_is_sn_less(buffer
->head_sn
, nssn
,
649 (!amsdu
|| last_subframe
))
650 buffer
->head_sn
= nssn
;
651 /* No need to update AMSDU last SN - we are moving the head */
652 spin_unlock_bh(&buffer
->lock
);
656 index
= sn
% buffer
->buf_size
;
659 * Check if we already stored this frame
660 * As AMSDU is either received or not as whole, logic is simple:
661 * If we have frames in that position in the buffer and the last frame
662 * originated from AMSDU had a different SN then it is a retransmission.
663 * If it is the same SN then if the subframe index is incrementing it
664 * is the same AMSDU - otherwise it is a retransmission.
666 tail
= skb_peek_tail(&buffer
->entries
[index
]);
669 else if (tail
&& (sn
!= buffer
->last_amsdu
||
670 buffer
->last_sub_index
>= sub_frame_idx
))
673 /* put in reorder buffer */
674 __skb_queue_tail(&buffer
->entries
[index
], skb
);
675 buffer
->num_stored
++;
676 buffer
->reorder_time
[index
] = jiffies
;
679 buffer
->last_amsdu
= sn
;
680 buffer
->last_sub_index
= sub_frame_idx
;
684 * We cannot trust NSSN for AMSDU sub-frames that are not the last.
685 * The reason is that NSSN advances on the first sub-frame, and may
686 * cause the reorder buffer to advance before all the sub-frames arrive.
687 * Example: reorder buffer contains SN 0 & 2, and we receive AMSDU with
688 * SN 1. NSSN for first sub frame will be 3 with the result of driver
689 * releasing SN 0,1, 2. When sub-frame 1 arrives - reorder buffer is
690 * already ahead and it will be dropped.
691 * If the last sub-frame is not on this queue - we will get frame
692 * release notification with up to date NSSN.
694 if (!amsdu
|| last_subframe
)
695 iwl_mvm_release_frames(mvm
, sta
, napi
, buffer
, nssn
);
697 spin_unlock_bh(&buffer
->lock
);
702 spin_unlock_bh(&buffer
->lock
);
706 static void iwl_mvm_agg_rx_received(struct iwl_mvm
*mvm
, u8 baid
)
708 unsigned long now
= jiffies
;
709 unsigned long timeout
;
710 struct iwl_mvm_baid_data
*data
;
714 data
= rcu_dereference(mvm
->baid_map
[baid
]);
721 timeout
= data
->timeout
;
723 * Do not update last rx all the time to avoid cache bouncing
724 * between the rx queues.
725 * Update it every timeout. Worst case is the session will
726 * expire after ~ 2 * timeout, which doesn't matter that much.
728 if (time_before(data
->last_rx
+ TU_TO_JIFFIES(timeout
), now
))
729 /* Update is atomic */
736 void iwl_mvm_rx_mpdu_mq(struct iwl_mvm
*mvm
, struct napi_struct
*napi
,
737 struct iwl_rx_cmd_buffer
*rxb
, int queue
)
739 struct ieee80211_rx_status
*rx_status
;
740 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
741 struct iwl_rx_mpdu_desc
*desc
= (void *)pkt
->data
;
742 struct ieee80211_hdr
*hdr
= (void *)(pkt
->data
+ sizeof(*desc
));
743 u32 len
= le16_to_cpu(desc
->mpdu_len
);
744 u32 rate_n_flags
= le32_to_cpu(desc
->rate_n_flags
);
745 u16 phy_info
= le16_to_cpu(desc
->phy_info
);
746 struct ieee80211_sta
*sta
= NULL
;
750 /* Dont use dev_alloc_skb(), we'll have enough headroom once
751 * ieee80211_hdr pulled.
753 skb
= alloc_skb(128, GFP_ATOMIC
);
755 IWL_ERR(mvm
, "alloc_skb failed\n");
759 rx_status
= IEEE80211_SKB_RXCB(skb
);
761 if (iwl_mvm_rx_crypto(mvm
, hdr
, rx_status
, desc
, queue
, &crypt_len
)) {
767 * Keep packets with CRC errors (and with overrun) for monitor mode
768 * (otherwise the firmware discards them) but mark them as bad.
770 if (!(desc
->status
& cpu_to_le16(IWL_RX_MPDU_STATUS_CRC_OK
)) ||
771 !(desc
->status
& cpu_to_le16(IWL_RX_MPDU_STATUS_OVERRUN_OK
))) {
772 IWL_DEBUG_RX(mvm
, "Bad CRC or FIFO: 0x%08X.\n",
773 le16_to_cpu(desc
->status
));
774 rx_status
->flag
|= RX_FLAG_FAILED_FCS_CRC
;
776 /* set the preamble flag if appropriate */
777 if (phy_info
& IWL_RX_MPDU_PHY_SHORT_PREAMBLE
)
778 rx_status
->flag
|= RX_FLAG_SHORTPRE
;
780 if (likely(!(phy_info
& IWL_RX_MPDU_PHY_TSF_OVERLOAD
))) {
781 rx_status
->mactime
= le64_to_cpu(desc
->tsf_on_air_rise
);
782 /* TSF as indicated by the firmware is at INA time */
783 rx_status
->flag
|= RX_FLAG_MACTIME_PLCP_START
;
785 rx_status
->device_timestamp
= le32_to_cpu(desc
->gp2_on_air_rise
);
786 rx_status
->band
= desc
->channel
> 14 ? NL80211_BAND_5GHZ
:
788 rx_status
->freq
= ieee80211_channel_to_frequency(desc
->channel
,
790 iwl_mvm_get_signal_strength(mvm
, desc
, rx_status
);
792 /* update aggregation data for monitor sake on default queue */
793 if (!queue
&& (phy_info
& IWL_RX_MPDU_PHY_AMPDU
)) {
794 bool toggle_bit
= phy_info
& IWL_RX_MPDU_PHY_AMPDU_TOGGLE
;
796 rx_status
->flag
|= RX_FLAG_AMPDU_DETAILS
;
797 rx_status
->ampdu_reference
= mvm
->ampdu_ref
;
798 /* toggle is switched whenever new aggregation starts */
799 if (toggle_bit
!= mvm
->ampdu_toggle
) {
801 mvm
->ampdu_toggle
= toggle_bit
;
807 if (le16_to_cpu(desc
->status
) & IWL_RX_MPDU_STATUS_SRC_STA_FOUND
) {
808 u8 id
= desc
->sta_id_flags
& IWL_RX_MPDU_SIF_STA_ID_MASK
;
810 if (!WARN_ON_ONCE(id
>= IWL_MVM_STATION_COUNT
)) {
811 sta
= rcu_dereference(mvm
->fw_id_to_mac_id
[id
]);
815 } else if (!is_multicast_ether_addr(hdr
->addr2
)) {
817 * This is fine since we prevent two stations with the same
818 * address from being added.
820 sta
= ieee80211_find_sta_by_ifaddr(mvm
->hw
, hdr
->addr2
, NULL
);
824 struct iwl_mvm_sta
*mvmsta
= iwl_mvm_sta_from_mac80211(sta
);
825 struct ieee80211_vif
*tx_blocked_vif
=
826 rcu_dereference(mvm
->csa_tx_blocked_vif
);
827 u8 baid
= (u8
)((le32_to_cpu(desc
->reorder_data
) &
828 IWL_RX_MPDU_REORDER_BAID_MASK
) >>
829 IWL_RX_MPDU_REORDER_BAID_SHIFT
);
832 * We have tx blocked stations (with CS bit). If we heard
833 * frames from a blocked station on a new channel we can
836 if (unlikely(tx_blocked_vif
) &&
837 tx_blocked_vif
== mvmsta
->vif
) {
838 struct iwl_mvm_vif
*mvmvif
=
839 iwl_mvm_vif_from_mac80211(tx_blocked_vif
);
841 if (mvmvif
->csa_target_freq
== rx_status
->freq
)
842 iwl_mvm_sta_modify_disable_tx_ap(mvm
, sta
,
846 rs_update_last_rssi(mvm
, &mvmsta
->lq_sta
, rx_status
);
848 if (iwl_fw_dbg_trigger_enabled(mvm
->fw
, FW_DBG_TRIGGER_RSSI
) &&
849 ieee80211_is_beacon(hdr
->frame_control
)) {
850 struct iwl_fw_dbg_trigger_tlv
*trig
;
851 struct iwl_fw_dbg_trigger_low_rssi
*rssi_trig
;
855 trig
= iwl_fw_dbg_get_trigger(mvm
->fw
,
856 FW_DBG_TRIGGER_RSSI
);
857 rssi_trig
= (void *)trig
->data
;
858 rssi
= le32_to_cpu(rssi_trig
->rssi
);
861 iwl_fw_dbg_trigger_check_stop(mvm
, mvmsta
->vif
,
863 if (trig_check
&& rx_status
->signal
< rssi
)
864 iwl_mvm_fw_dbg_collect_trig(mvm
, trig
, NULL
);
867 if (ieee80211_is_data(hdr
->frame_control
))
868 iwl_mvm_rx_csum(sta
, skb
, desc
);
870 if (iwl_mvm_is_nonagg_dup(sta
, queue
, rx_status
, hdr
, desc
)) {
877 * Our hardware de-aggregates AMSDUs but copies the mac header
878 * as it to the de-aggregated MPDUs. We need to turn off the
879 * AMSDU bit in the QoS control ourselves.
881 if ((desc
->mac_flags2
& IWL_RX_MPDU_MFLG2_AMSDU
) &&
882 !WARN_ON(!ieee80211_is_data_qos(hdr
->frame_control
))) {
883 u8
*qc
= ieee80211_get_qos_ctl(hdr
);
885 *qc
&= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT
;
887 if (baid
!= IWL_RX_REORDER_DATA_INVALID_BAID
)
888 iwl_mvm_agg_rx_received(mvm
, baid
);
891 /* Set up the HT phy flags */
892 switch (rate_n_flags
& RATE_MCS_CHAN_WIDTH_MSK
) {
893 case RATE_MCS_CHAN_WIDTH_20
:
895 case RATE_MCS_CHAN_WIDTH_40
:
896 rx_status
->flag
|= RX_FLAG_40MHZ
;
898 case RATE_MCS_CHAN_WIDTH_80
:
899 rx_status
->vht_flag
|= RX_VHT_FLAG_80MHZ
;
901 case RATE_MCS_CHAN_WIDTH_160
:
902 rx_status
->vht_flag
|= RX_VHT_FLAG_160MHZ
;
905 if (rate_n_flags
& RATE_MCS_SGI_MSK
)
906 rx_status
->flag
|= RX_FLAG_SHORT_GI
;
907 if (rate_n_flags
& RATE_HT_MCS_GF_MSK
)
908 rx_status
->flag
|= RX_FLAG_HT_GF
;
909 if (rate_n_flags
& RATE_MCS_LDPC_MSK
)
910 rx_status
->flag
|= RX_FLAG_LDPC
;
911 if (rate_n_flags
& RATE_MCS_HT_MSK
) {
912 u8 stbc
= (rate_n_flags
& RATE_MCS_HT_STBC_MSK
) >>
914 rx_status
->flag
|= RX_FLAG_HT
;
915 rx_status
->rate_idx
= rate_n_flags
& RATE_HT_MCS_INDEX_MSK
;
916 rx_status
->flag
|= stbc
<< RX_FLAG_STBC_SHIFT
;
917 } else if (rate_n_flags
& RATE_MCS_VHT_MSK
) {
918 u8 stbc
= (rate_n_flags
& RATE_MCS_VHT_STBC_MSK
) >>
921 ((rate_n_flags
& RATE_VHT_MCS_NSS_MSK
) >>
922 RATE_VHT_MCS_NSS_POS
) + 1;
923 rx_status
->rate_idx
= rate_n_flags
& RATE_VHT_MCS_RATE_CODE_MSK
;
924 rx_status
->flag
|= RX_FLAG_VHT
;
925 rx_status
->flag
|= stbc
<< RX_FLAG_STBC_SHIFT
;
926 if (rate_n_flags
& RATE_MCS_BF_MSK
)
927 rx_status
->vht_flag
|= RX_VHT_FLAG_BF
;
929 rx_status
->rate_idx
=
930 iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags
,
934 /* management stuff on default queue */
936 if (unlikely((ieee80211_is_beacon(hdr
->frame_control
) ||
937 ieee80211_is_probe_resp(hdr
->frame_control
)) &&
938 mvm
->sched_scan_pass_all
==
939 SCHED_SCAN_PASS_ALL_ENABLED
))
940 mvm
->sched_scan_pass_all
= SCHED_SCAN_PASS_ALL_FOUND
;
942 if (unlikely(ieee80211_is_beacon(hdr
->frame_control
) ||
943 ieee80211_is_probe_resp(hdr
->frame_control
)))
944 rx_status
->boottime_ns
= ktime_get_boot_ns();
947 iwl_mvm_create_skb(skb
, hdr
, len
, crypt_len
, rxb
);
948 if (!iwl_mvm_reorder(mvm
, napi
, queue
, sta
, skb
, desc
))
949 iwl_mvm_pass_packet_to_mac80211(mvm
, napi
, skb
, queue
, sta
);
953 void iwl_mvm_rx_frame_release(struct iwl_mvm
*mvm
, struct napi_struct
*napi
,
954 struct iwl_rx_cmd_buffer
*rxb
, int queue
)
956 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
957 struct iwl_frame_release
*release
= (void *)pkt
->data
;
958 struct ieee80211_sta
*sta
;
959 struct iwl_mvm_reorder_buffer
*reorder_buf
;
960 struct iwl_mvm_baid_data
*ba_data
;
962 int baid
= release
->baid
;
964 IWL_DEBUG_HT(mvm
, "Frame release notification for BAID %u, NSSN %d\n",
965 release
->baid
, le16_to_cpu(release
->nssn
));
967 if (WARN_ON_ONCE(baid
== IWL_RX_REORDER_DATA_INVALID_BAID
))
972 ba_data
= rcu_dereference(mvm
->baid_map
[baid
]);
973 if (WARN_ON_ONCE(!ba_data
))
976 sta
= rcu_dereference(mvm
->fw_id_to_mac_id
[ba_data
->sta_id
]);
977 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta
)))
980 reorder_buf
= &ba_data
->reorder_buf
[queue
];
982 spin_lock_bh(&reorder_buf
->lock
);
983 iwl_mvm_release_frames(mvm
, sta
, napi
, reorder_buf
,
984 le16_to_cpu(release
->nssn
));
985 spin_unlock_bh(&reorder_buf
->lock
);