1 /******************************************************************************
2 *
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.
5 *
6 * GPL LICENSE SUMMARY
7 *
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
11 * Copyright(c) 2018 Intel Corporation
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of version 2 of the GNU General Public License as
15 * published by the Free Software Foundation.
16 *
17 * This program is distributed in the hope that it will be useful, but
18 * WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * General Public License for more details.
21 *
22 * The full GNU General Public License is included in this distribution
23 * in the file called COPYING.
24 *
25 * Contact Information:
26 * Intel Linux Wireless <ilw@linux.intel.com>
27 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
28 *
29 * BSD LICENSE
30 *
31 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
32 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
33 * Copyright(c) 2015 - 2017 Intel Deutschland GmbH
34 * Copyright(c) 2018 Intel Corporation
35 * All rights reserved.
36 *
37 * Redistribution and use in source and binary forms, with or without
38 * modification, are permitted provided that the following conditions
39 * are met:
40 *
41 * * Redistributions of source code must retain the above copyright
42 * notice, this list of conditions and the following disclaimer.
43 * * Redistributions in binary form must reproduce the above copyright
44 * notice, this list of conditions and the following disclaimer in
45 * the documentation and/or other materials provided with the
46 * distribution.
47 * * Neither the name Intel Corporation nor the names of its
48 * contributors may be used to endorse or promote products derived
49 * from this software without specific prior written permission.
50 *
51 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
52 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
53 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
54 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
55 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
56 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
57 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
58 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
59 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
60 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
61 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
62 *****************************************************************************/
63 #include <linux/etherdevice.h>
64 #include <linux/skbuff.h>
65 #include "iwl-trans.h"
66 #include "mvm.h"
67 #include "fw-api.h"
68
iwl_mvm_check_pn(struct iwl_mvm * mvm,struct sk_buff * skb,int queue,struct ieee80211_sta * sta)69 static inline int iwl_mvm_check_pn(struct iwl_mvm *mvm, struct sk_buff *skb,
70 int queue, struct ieee80211_sta *sta)
71 {
72 struct iwl_mvm_sta *mvmsta;
73 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
74 struct ieee80211_rx_status *stats = IEEE80211_SKB_RXCB(skb);
75 struct iwl_mvm_key_pn *ptk_pn;
76 int res;
77 u8 tid, keyidx;
78 u8 pn[IEEE80211_CCMP_PN_LEN];
79 u8 *extiv;
80
81 /* do PN checking */
82
83 /* multicast and non-data only arrives on default queue */
84 if (!ieee80211_is_data(hdr->frame_control) ||
85 is_multicast_ether_addr(hdr->addr1))
86 return 0;
87
88 /* do not check PN for open AP */
89 if (!(stats->flag & RX_FLAG_DECRYPTED))
90 return 0;
91
92 /*
93 * avoid checking for default queue - we don't want to replicate
94 * all the logic that's necessary for checking the PN on fragmented
95 * frames, leave that to mac80211
96 */
97 if (queue == 0)
98 return 0;
99
100 /* if we are here - this for sure is either CCMP or GCMP */
101 if (IS_ERR_OR_NULL(sta)) {
102 IWL_ERR(mvm,
103 "expected hw-decrypted unicast frame for station\n");
104 return -1;
105 }
106
107 mvmsta = iwl_mvm_sta_from_mac80211(sta);
108
109 extiv = (u8 *)hdr + ieee80211_hdrlen(hdr->frame_control);
110 keyidx = extiv[3] >> 6;
111
112 ptk_pn = rcu_dereference(mvmsta->ptk_pn[keyidx]);
113 if (!ptk_pn)
114 return -1;
115
116 if (ieee80211_is_data_qos(hdr->frame_control))
117 tid = ieee80211_get_tid(hdr);
118 else
119 tid = 0;
120
121 /* we don't use HCCA/802.11 QoS TSPECs, so drop such frames */
122 if (tid >= IWL_MAX_TID_COUNT)
123 return -1;
124
125 /* load pn */
126 pn[0] = extiv[7];
127 pn[1] = extiv[6];
128 pn[2] = extiv[5];
129 pn[3] = extiv[4];
130 pn[4] = extiv[1];
131 pn[5] = extiv[0];
132
133 res = memcmp(pn, ptk_pn->q[queue].pn[tid], IEEE80211_CCMP_PN_LEN);
134 if (res < 0)
135 return -1;
136 if (!res && !(stats->flag & RX_FLAG_ALLOW_SAME_PN))
137 return -1;
138
139 memcpy(ptk_pn->q[queue].pn[tid], pn, IEEE80211_CCMP_PN_LEN);
140 stats->flag |= RX_FLAG_PN_VALIDATED;
141
142 return 0;
143 }
144
145 /* iwl_mvm_create_skb Adds the rxb to a new skb */
iwl_mvm_create_skb(struct sk_buff * skb,struct ieee80211_hdr * hdr,u16 len,u8 crypt_len,struct iwl_rx_cmd_buffer * rxb)146 static void iwl_mvm_create_skb(struct sk_buff *skb, struct ieee80211_hdr *hdr,
147 u16 len, u8 crypt_len,
148 struct iwl_rx_cmd_buffer *rxb)
149 {
150 struct iwl_rx_packet *pkt = rxb_addr(rxb);
151 struct iwl_rx_mpdu_desc *desc = (void *)pkt->data;
152 unsigned int headlen, fraglen, pad_len = 0;
153 unsigned int hdrlen = ieee80211_hdrlen(hdr->frame_control);
154
155 if (desc->mac_flags2 & IWL_RX_MPDU_MFLG2_PAD) {
156 len -= 2;
157 pad_len = 2;
158 }
159
160 /* If frame is small enough to fit in skb->head, pull it completely.
161 * If not, only pull ieee80211_hdr (including crypto if present, and
162 * an additional 8 bytes for SNAP/ethertype, see below) so that
163 * splice() or TCP coalesce are more efficient.
164 *
165 * Since, in addition, ieee80211_data_to_8023() always pull in at
166 * least 8 bytes (possibly more for mesh) we can do the same here
167 * to save the cost of doing it later. That still doesn't pull in
168 * the actual IP header since the typical case has a SNAP header.
169 * If the latter changes (there are efforts in the standards group
170 * to do so) we should revisit this and ieee80211_data_to_8023().
171 */
172 headlen = (len <= skb_tailroom(skb)) ? len :
173 hdrlen + crypt_len + 8;
174
175 /* The firmware may align the packet to DWORD.
176 * The padding is inserted after the IV.
177 * After copying the header + IV skip the padding if
178 * present before copying packet data.
179 */
180 hdrlen += crypt_len;
181 skb_put_data(skb, hdr, hdrlen);
182 skb_put_data(skb, (u8 *)hdr + hdrlen + pad_len, headlen - hdrlen);
183
184 fraglen = len - headlen;
185
186 if (fraglen) {
187 int offset = (void *)hdr + headlen + pad_len -
188 rxb_addr(rxb) + rxb_offset(rxb);
189
190 skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset,
191 fraglen, rxb->truesize);
192 }
193 }
194
195 /* iwl_mvm_pass_packet_to_mac80211 - passes the packet for mac80211 */
iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm * mvm,struct napi_struct * napi,struct sk_buff * skb,int queue,struct ieee80211_sta * sta)196 static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm,
197 struct napi_struct *napi,
198 struct sk_buff *skb, int queue,
199 struct ieee80211_sta *sta)
200 {
201 struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
202
203 if (iwl_mvm_check_pn(mvm, skb, queue, sta)) {
204 kfree_skb(skb);
205 } else {
206 unsigned int radiotap_len = 0;
207
208 if (rx_status->flag & RX_FLAG_RADIOTAP_HE)
209 radiotap_len += sizeof(struct ieee80211_radiotap_he);
210 if (rx_status->flag & RX_FLAG_RADIOTAP_HE_MU)
211 radiotap_len += sizeof(struct ieee80211_radiotap_he_mu);
212 __skb_push(skb, radiotap_len);
213 ieee80211_rx_napi(mvm->hw, sta, skb, napi);
214 }
215 }
216
iwl_mvm_get_signal_strength(struct iwl_mvm * mvm,struct ieee80211_rx_status * rx_status,u32 rate_n_flags,int energy_a,int energy_b)217 static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm,
218 struct ieee80211_rx_status *rx_status,
219 u32 rate_n_flags, int energy_a,
220 int energy_b)
221 {
222 int max_energy;
223 u32 rate_flags = rate_n_flags;
224
225 energy_a = energy_a ? -energy_a : S8_MIN;
226 energy_b = energy_b ? -energy_b : S8_MIN;
227 max_energy = max(energy_a, energy_b);
228
229 IWL_DEBUG_STATS(mvm, "energy In A %d B %d, and max %d\n",
230 energy_a, energy_b, max_energy);
231
232 rx_status->signal = max_energy;
233 rx_status->chains =
234 (rate_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS;
235 rx_status->chain_signal[0] = energy_a;
236 rx_status->chain_signal[1] = energy_b;
237 rx_status->chain_signal[2] = S8_MIN;
238 }
239
iwl_mvm_rx_crypto(struct iwl_mvm * mvm,struct ieee80211_hdr * hdr,struct ieee80211_rx_status * stats,u16 phy_info,struct iwl_rx_mpdu_desc * desc,u32 pkt_flags,int queue,u8 * crypt_len)240 static int iwl_mvm_rx_crypto(struct iwl_mvm *mvm, struct ieee80211_hdr *hdr,
241 struct ieee80211_rx_status *stats, u16 phy_info,
242 struct iwl_rx_mpdu_desc *desc,
243 u32 pkt_flags, int queue, u8 *crypt_len)
244 {
245 u16 status = le16_to_cpu(desc->status);
246
247 /*
248 * Drop UNKNOWN frames in aggregation, unless in monitor mode
249 * (where we don't have the keys).
250 * We limit this to aggregation because in TKIP this is a valid
251 * scenario, since we may not have the (correct) TTAK (phase 1
252 * key) in the firmware.
253 */
254 if (phy_info & IWL_RX_MPDU_PHY_AMPDU &&
255 (status & IWL_RX_MPDU_STATUS_SEC_MASK) ==
256 IWL_RX_MPDU_STATUS_SEC_UNKNOWN && !mvm->monitor_on)
257 return -1;
258
259 if (!ieee80211_has_protected(hdr->frame_control) ||
260 (status & IWL_RX_MPDU_STATUS_SEC_MASK) ==
261 IWL_RX_MPDU_STATUS_SEC_NONE)
262 return 0;
263
264 /* TODO: handle packets encrypted with unknown alg */
265
266 switch (status & IWL_RX_MPDU_STATUS_SEC_MASK) {
267 case IWL_RX_MPDU_STATUS_SEC_CCM:
268 case IWL_RX_MPDU_STATUS_SEC_GCM:
269 BUILD_BUG_ON(IEEE80211_CCMP_PN_LEN != IEEE80211_GCMP_PN_LEN);
270 /* alg is CCM: check MIC only */
271 if (!(status & IWL_RX_MPDU_STATUS_MIC_OK))
272 return -1;
273
274 stats->flag |= RX_FLAG_DECRYPTED;
275 if (pkt_flags & FH_RSCSR_RADA_EN)
276 stats->flag |= RX_FLAG_MIC_STRIPPED;
277 *crypt_len = IEEE80211_CCMP_HDR_LEN;
278 return 0;
279 case IWL_RX_MPDU_STATUS_SEC_TKIP:
280 /* Don't drop the frame and decrypt it in SW */
281 if (!fw_has_api(&mvm->fw->ucode_capa,
282 IWL_UCODE_TLV_API_DEPRECATE_TTAK) &&
283 !(status & IWL_RX_MPDU_RES_STATUS_TTAK_OK))
284 return 0;
285
286 *crypt_len = IEEE80211_TKIP_IV_LEN;
287 /* fall through if TTAK OK */
288 case IWL_RX_MPDU_STATUS_SEC_WEP:
289 if (!(status & IWL_RX_MPDU_STATUS_ICV_OK))
290 return -1;
291
292 stats->flag |= RX_FLAG_DECRYPTED;
293 if ((status & IWL_RX_MPDU_STATUS_SEC_MASK) ==
294 IWL_RX_MPDU_STATUS_SEC_WEP)
295 *crypt_len = IEEE80211_WEP_IV_LEN;
296
297 if (pkt_flags & FH_RSCSR_RADA_EN)
298 stats->flag |= RX_FLAG_ICV_STRIPPED;
299
300 return 0;
301 case IWL_RX_MPDU_STATUS_SEC_EXT_ENC:
302 if (!(status & IWL_RX_MPDU_STATUS_MIC_OK))
303 return -1;
304 stats->flag |= RX_FLAG_DECRYPTED;
305 return 0;
306 default:
307 /* Expected in monitor (not having the keys) */
308 if (!mvm->monitor_on)
309 IWL_ERR(mvm, "Unhandled alg: 0x%x\n", status);
310 }
311
312 return 0;
313 }
314
iwl_mvm_rx_csum(struct ieee80211_sta * sta,struct sk_buff * skb,struct iwl_rx_mpdu_desc * desc)315 static void iwl_mvm_rx_csum(struct ieee80211_sta *sta,
316 struct sk_buff *skb,
317 struct iwl_rx_mpdu_desc *desc)
318 {
319 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
320 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
321 u16 flags = le16_to_cpu(desc->l3l4_flags);
322 u8 l3_prot = (u8)((flags & IWL_RX_L3L4_L3_PROTO_MASK) >>
323 IWL_RX_L3_PROTO_POS);
324
325 if (mvmvif->features & NETIF_F_RXCSUM &&
326 flags & IWL_RX_L3L4_TCP_UDP_CSUM_OK &&
327 (flags & IWL_RX_L3L4_IP_HDR_CSUM_OK ||
328 l3_prot == IWL_RX_L3_TYPE_IPV6 ||
329 l3_prot == IWL_RX_L3_TYPE_IPV6_FRAG))
330 skb->ip_summed = CHECKSUM_UNNECESSARY;
331 }
332
333 /*
334 * returns true if a packet is a duplicate and should be dropped.
335 * Updates AMSDU PN tracking info
336 */
iwl_mvm_is_dup(struct ieee80211_sta * sta,int queue,struct ieee80211_rx_status * rx_status,struct ieee80211_hdr * hdr,struct iwl_rx_mpdu_desc * desc)337 static bool iwl_mvm_is_dup(struct ieee80211_sta *sta, int queue,
338 struct ieee80211_rx_status *rx_status,
339 struct ieee80211_hdr *hdr,
340 struct iwl_rx_mpdu_desc *desc)
341 {
342 struct iwl_mvm_sta *mvm_sta;
343 struct iwl_mvm_rxq_dup_data *dup_data;
344 u8 tid, sub_frame_idx;
345
346 if (WARN_ON(IS_ERR_OR_NULL(sta)))
347 return false;
348
349 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
350 dup_data = &mvm_sta->dup_data[queue];
351
352 /*
353 * Drop duplicate 802.11 retransmissions
354 * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery")
355 */
356 if (ieee80211_is_ctl(hdr->frame_control) ||
357 ieee80211_is_qos_nullfunc(hdr->frame_control) ||
358 is_multicast_ether_addr(hdr->addr1)) {
359 rx_status->flag |= RX_FLAG_DUP_VALIDATED;
360 return false;
361 }
362
363 if (ieee80211_is_data_qos(hdr->frame_control))
364 /* frame has qos control */
365 tid = ieee80211_get_tid(hdr);
366 else
367 tid = IWL_MAX_TID_COUNT;
368
369 /* If this wasn't a part of an A-MSDU the sub-frame index will be 0 */
370 sub_frame_idx = desc->amsdu_info &
371 IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK;
372
373 if (unlikely(ieee80211_has_retry(hdr->frame_control) &&
374 dup_data->last_seq[tid] == hdr->seq_ctrl &&
375 dup_data->last_sub_frame[tid] >= sub_frame_idx))
376 return true;
377
378 /* Allow same PN as the first subframe for following sub frames */
379 if (dup_data->last_seq[tid] == hdr->seq_ctrl &&
380 sub_frame_idx > dup_data->last_sub_frame[tid] &&
381 desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU)
382 rx_status->flag |= RX_FLAG_ALLOW_SAME_PN;
383
384 dup_data->last_seq[tid] = hdr->seq_ctrl;
385 dup_data->last_sub_frame[tid] = sub_frame_idx;
386
387 rx_status->flag |= RX_FLAG_DUP_VALIDATED;
388
389 return false;
390 }
391
iwl_mvm_notify_rx_queue(struct iwl_mvm * mvm,u32 rxq_mask,const u8 * data,u32 count)392 int iwl_mvm_notify_rx_queue(struct iwl_mvm *mvm, u32 rxq_mask,
393 const u8 *data, u32 count)
394 {
395 struct iwl_rxq_sync_cmd *cmd;
396 u32 data_size = sizeof(*cmd) + count;
397 int ret;
398
399 /* should be DWORD aligned */
400 if (WARN_ON(count & 3 || count > IWL_MULTI_QUEUE_SYNC_MSG_MAX_SIZE))
401 return -EINVAL;
402
403 cmd = kzalloc(data_size, GFP_KERNEL);
404 if (!cmd)
405 return -ENOMEM;
406
407 cmd->rxq_mask = cpu_to_le32(rxq_mask);
408 cmd->count = cpu_to_le32(count);
409 cmd->flags = 0;
410 memcpy(cmd->payload, data, count);
411
412 ret = iwl_mvm_send_cmd_pdu(mvm,
413 WIDE_ID(DATA_PATH_GROUP,
414 TRIGGER_RX_QUEUES_NOTIF_CMD),
415 0, data_size, cmd);
416
417 kfree(cmd);
418 return ret;
419 }
420
421 /*
422 * Returns true if sn2 - buffer_size < sn1 < sn2.
423 * To be used only in order to compare reorder buffer head with NSSN.
424 * We fully trust NSSN unless it is behind us due to reorder timeout.
425 * Reorder timeout can only bring us up to buffer_size SNs ahead of NSSN.
426 */
iwl_mvm_is_sn_less(u16 sn1,u16 sn2,u16 buffer_size)427 static bool iwl_mvm_is_sn_less(u16 sn1, u16 sn2, u16 buffer_size)
428 {
429 return ieee80211_sn_less(sn1, sn2) &&
430 !ieee80211_sn_less(sn1, sn2 - buffer_size);
431 }
432
433 #define RX_REORDER_BUF_TIMEOUT_MQ (HZ / 10)
434
iwl_mvm_release_frames(struct iwl_mvm * mvm,struct ieee80211_sta * sta,struct napi_struct * napi,struct iwl_mvm_baid_data * baid_data,struct iwl_mvm_reorder_buffer * reorder_buf,u16 nssn)435 static void iwl_mvm_release_frames(struct iwl_mvm *mvm,
436 struct ieee80211_sta *sta,
437 struct napi_struct *napi,
438 struct iwl_mvm_baid_data *baid_data,
439 struct iwl_mvm_reorder_buffer *reorder_buf,
440 u16 nssn)
441 {
442 struct iwl_mvm_reorder_buf_entry *entries =
443 &baid_data->entries[reorder_buf->queue *
444 baid_data->entries_per_queue];
445 u16 ssn = reorder_buf->head_sn;
446
447 lockdep_assert_held(&reorder_buf->lock);
448
449 /* ignore nssn smaller than head sn - this can happen due to timeout */
450 if (iwl_mvm_is_sn_less(nssn, ssn, reorder_buf->buf_size))
451 goto set_timer;
452
453 while (iwl_mvm_is_sn_less(ssn, nssn, reorder_buf->buf_size)) {
454 int index = ssn % reorder_buf->buf_size;
455 struct sk_buff_head *skb_list = &entries[index].e.frames;
456 struct sk_buff *skb;
457
458 ssn = ieee80211_sn_inc(ssn);
459
460 /*
461 * Empty the list. Will have more than one frame for A-MSDU.
462 * Empty list is valid as well since nssn indicates frames were
463 * received.
464 */
465 while ((skb = __skb_dequeue(skb_list))) {
466 iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb,
467 reorder_buf->queue,
468 sta);
469 reorder_buf->num_stored--;
470 }
471 }
472 reorder_buf->head_sn = nssn;
473
474 set_timer:
475 if (reorder_buf->num_stored && !reorder_buf->removed) {
476 u16 index = reorder_buf->head_sn % reorder_buf->buf_size;
477
478 while (skb_queue_empty(&entries[index].e.frames))
479 index = (index + 1) % reorder_buf->buf_size;
480 /* modify timer to match next frame's expiration time */
481 mod_timer(&reorder_buf->reorder_timer,
482 entries[index].e.reorder_time + 1 +
483 RX_REORDER_BUF_TIMEOUT_MQ);
484 } else {
485 del_timer(&reorder_buf->reorder_timer);
486 }
487 }
488
iwl_mvm_reorder_timer_expired(struct timer_list * t)489 void iwl_mvm_reorder_timer_expired(struct timer_list *t)
490 {
491 struct iwl_mvm_reorder_buffer *buf = from_timer(buf, t, reorder_timer);
492 struct iwl_mvm_baid_data *baid_data =
493 iwl_mvm_baid_data_from_reorder_buf(buf);
494 struct iwl_mvm_reorder_buf_entry *entries =
495 &baid_data->entries[buf->queue * baid_data->entries_per_queue];
496 int i;
497 u16 sn = 0, index = 0;
498 bool expired = false;
499 bool cont = false;
500
501 spin_lock(&buf->lock);
502
503 if (!buf->num_stored || buf->removed) {
504 spin_unlock(&buf->lock);
505 return;
506 }
507
508 for (i = 0; i < buf->buf_size ; i++) {
509 index = (buf->head_sn + i) % buf->buf_size;
510
511 if (skb_queue_empty(&entries[index].e.frames)) {
512 /*
513 * If there is a hole and the next frame didn't expire
514 * we want to break and not advance SN
515 */
516 cont = false;
517 continue;
518 }
519 if (!cont &&
520 !time_after(jiffies, entries[index].e.reorder_time +
521 RX_REORDER_BUF_TIMEOUT_MQ))
522 break;
523
524 expired = true;
525 /* continue until next hole after this expired frames */
526 cont = true;
527 sn = ieee80211_sn_add(buf->head_sn, i + 1);
528 }
529
530 if (expired) {
531 struct ieee80211_sta *sta;
532 struct iwl_mvm_sta *mvmsta;
533 u8 sta_id = baid_data->sta_id;
534
535 rcu_read_lock();
536 sta = rcu_dereference(buf->mvm->fw_id_to_mac_id[sta_id]);
537 mvmsta = iwl_mvm_sta_from_mac80211(sta);
538
539 /* SN is set to the last expired frame + 1 */
540 IWL_DEBUG_HT(buf->mvm,
541 "Releasing expired frames for sta %u, sn %d\n",
542 sta_id, sn);
543 iwl_mvm_event_frame_timeout_callback(buf->mvm, mvmsta->vif,
544 sta, baid_data->tid);
545 iwl_mvm_release_frames(buf->mvm, sta, NULL, baid_data, buf, sn);
546 rcu_read_unlock();
547 } else {
548 /*
549 * If no frame expired and there are stored frames, index is now
550 * pointing to the first unexpired frame - modify timer
551 * accordingly to this frame.
552 */
553 mod_timer(&buf->reorder_timer,
554 entries[index].e.reorder_time +
555 1 + RX_REORDER_BUF_TIMEOUT_MQ);
556 }
557 spin_unlock(&buf->lock);
558 }
559
iwl_mvm_del_ba(struct iwl_mvm * mvm,int queue,struct iwl_mvm_delba_data * data)560 static void iwl_mvm_del_ba(struct iwl_mvm *mvm, int queue,
561 struct iwl_mvm_delba_data *data)
562 {
563 struct iwl_mvm_baid_data *ba_data;
564 struct ieee80211_sta *sta;
565 struct iwl_mvm_reorder_buffer *reorder_buf;
566 u8 baid = data->baid;
567
568 if (WARN_ONCE(baid >= IWL_MAX_BAID, "invalid BAID: %x\n", baid))
569 return;
570
571 rcu_read_lock();
572
573 ba_data = rcu_dereference(mvm->baid_map[baid]);
574 if (WARN_ON_ONCE(!ba_data))
575 goto out;
576
577 sta = rcu_dereference(mvm->fw_id_to_mac_id[ba_data->sta_id]);
578 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
579 goto out;
580
581 reorder_buf = &ba_data->reorder_buf[queue];
582
583 /* release all frames that are in the reorder buffer to the stack */
584 spin_lock_bh(&reorder_buf->lock);
585 iwl_mvm_release_frames(mvm, sta, NULL, ba_data, reorder_buf,
586 ieee80211_sn_add(reorder_buf->head_sn,
587 reorder_buf->buf_size));
588 spin_unlock_bh(&reorder_buf->lock);
589 del_timer_sync(&reorder_buf->reorder_timer);
590
591 out:
592 rcu_read_unlock();
593 }
594
iwl_mvm_rx_queue_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb,int queue)595 void iwl_mvm_rx_queue_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
596 int queue)
597 {
598 struct iwl_rx_packet *pkt = rxb_addr(rxb);
599 struct iwl_rxq_sync_notification *notif;
600 struct iwl_mvm_internal_rxq_notif *internal_notif;
601
602 notif = (void *)pkt->data;
603 internal_notif = (void *)notif->payload;
604
605 if (internal_notif->sync &&
606 mvm->queue_sync_cookie != internal_notif->cookie) {
607 WARN_ONCE(1, "Received expired RX queue sync message\n");
608 return;
609 }
610
611 switch (internal_notif->type) {
612 case IWL_MVM_RXQ_EMPTY:
613 break;
614 case IWL_MVM_RXQ_NOTIF_DEL_BA:
615 iwl_mvm_del_ba(mvm, queue, (void *)internal_notif->data);
616 break;
617 default:
618 WARN_ONCE(1, "Invalid identifier %d", internal_notif->type);
619 }
620
621 if (internal_notif->sync &&
622 !atomic_dec_return(&mvm->queue_sync_counter))
623 wake_up(&mvm->rx_sync_waitq);
624 }
625
626 /*
627 * Returns true if the MPDU was buffered\dropped, false if it should be passed
628 * to upper layer.
629 */
iwl_mvm_reorder(struct iwl_mvm * mvm,struct napi_struct * napi,int queue,struct ieee80211_sta * sta,struct sk_buff * skb,struct iwl_rx_mpdu_desc * desc)630 static bool iwl_mvm_reorder(struct iwl_mvm *mvm,
631 struct napi_struct *napi,
632 int queue,
633 struct ieee80211_sta *sta,
634 struct sk_buff *skb,
635 struct iwl_rx_mpdu_desc *desc)
636 {
637 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
638 struct iwl_mvm_sta *mvm_sta;
639 struct iwl_mvm_baid_data *baid_data;
640 struct iwl_mvm_reorder_buffer *buffer;
641 struct sk_buff *tail;
642 u32 reorder = le32_to_cpu(desc->reorder_data);
643 bool amsdu = desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU;
644 bool last_subframe =
645 desc->amsdu_info & IWL_RX_MPDU_AMSDU_LAST_SUBFRAME;
646 u8 tid = ieee80211_get_tid(hdr);
647 u8 sub_frame_idx = desc->amsdu_info &
648 IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK;
649 struct iwl_mvm_reorder_buf_entry *entries;
650 int index;
651 u16 nssn, sn;
652 u8 baid;
653
654 baid = (reorder & IWL_RX_MPDU_REORDER_BAID_MASK) >>
655 IWL_RX_MPDU_REORDER_BAID_SHIFT;
656
657 /*
658 * This also covers the case of receiving a Block Ack Request
659 * outside a BA session; we'll pass it to mac80211 and that
660 * then sends a delBA action frame.
661 */
662 if (baid == IWL_RX_REORDER_DATA_INVALID_BAID)
663 return false;
664
665 /* no sta yet */
666 if (WARN_ONCE(IS_ERR_OR_NULL(sta),
667 "Got valid BAID without a valid station assigned\n"))
668 return false;
669
670 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
671
672 /* not a data packet or a bar */
673 if (!ieee80211_is_back_req(hdr->frame_control) &&
674 (!ieee80211_is_data_qos(hdr->frame_control) ||
675 is_multicast_ether_addr(hdr->addr1)))
676 return false;
677
678 if (unlikely(!ieee80211_is_data_present(hdr->frame_control)))
679 return false;
680
681 baid_data = rcu_dereference(mvm->baid_map[baid]);
682 if (!baid_data) {
683 IWL_DEBUG_RX(mvm,
684 "Got valid BAID but no baid allocated, bypass the re-ordering buffer. Baid %d reorder 0x%x\n",
685 baid, reorder);
686 return false;
687 }
688
689 if (WARN(tid != baid_data->tid || mvm_sta->sta_id != baid_data->sta_id,
690 "baid 0x%x is mapped to sta:%d tid:%d, but was received for sta:%d tid:%d\n",
691 baid, baid_data->sta_id, baid_data->tid, mvm_sta->sta_id,
692 tid))
693 return false;
694
695 nssn = reorder & IWL_RX_MPDU_REORDER_NSSN_MASK;
696 sn = (reorder & IWL_RX_MPDU_REORDER_SN_MASK) >>
697 IWL_RX_MPDU_REORDER_SN_SHIFT;
698
699 buffer = &baid_data->reorder_buf[queue];
700 entries = &baid_data->entries[queue * baid_data->entries_per_queue];
701
702 spin_lock_bh(&buffer->lock);
703
704 if (!buffer->valid) {
705 if (reorder & IWL_RX_MPDU_REORDER_BA_OLD_SN) {
706 spin_unlock_bh(&buffer->lock);
707 return false;
708 }
709 buffer->valid = true;
710 }
711
712 if (ieee80211_is_back_req(hdr->frame_control)) {
713 iwl_mvm_release_frames(mvm, sta, napi, baid_data, buffer, nssn);
714 goto drop;
715 }
716
717 /*
718 * If there was a significant jump in the nssn - adjust.
719 * If the SN is smaller than the NSSN it might need to first go into
720 * the reorder buffer, in which case we just release up to it and the
721 * rest of the function will take care of storing it and releasing up to
722 * the nssn
723 */
724 if (!iwl_mvm_is_sn_less(nssn, buffer->head_sn + buffer->buf_size,
725 buffer->buf_size) ||
726 !ieee80211_sn_less(sn, buffer->head_sn + buffer->buf_size)) {
727 u16 min_sn = ieee80211_sn_less(sn, nssn) ? sn : nssn;
728
729 iwl_mvm_release_frames(mvm, sta, napi, baid_data, buffer,
730 min_sn);
731 }
732
733 /* drop any oudated packets */
734 if (ieee80211_sn_less(sn, buffer->head_sn))
735 goto drop;
736
737 /* release immediately if allowed by nssn and no stored frames */
738 if (!buffer->num_stored && ieee80211_sn_less(sn, nssn)) {
739 if (iwl_mvm_is_sn_less(buffer->head_sn, nssn,
740 buffer->buf_size) &&
741 (!amsdu || last_subframe))
742 buffer->head_sn = nssn;
743 /* No need to update AMSDU last SN - we are moving the head */
744 spin_unlock_bh(&buffer->lock);
745 return false;
746 }
747
748 /*
749 * release immediately if there are no stored frames, and the sn is
750 * equal to the head.
751 * This can happen due to reorder timer, where NSSN is behind head_sn.
752 * When we released everything, and we got the next frame in the
753 * sequence, according to the NSSN we can't release immediately,
754 * while technically there is no hole and we can move forward.
755 */
756 if (!buffer->num_stored && sn == buffer->head_sn) {
757 if (!amsdu || last_subframe)
758 buffer->head_sn = ieee80211_sn_inc(buffer->head_sn);
759 /* No need to update AMSDU last SN - we are moving the head */
760 spin_unlock_bh(&buffer->lock);
761 return false;
762 }
763
764 index = sn % buffer->buf_size;
765
766 /*
767 * Check if we already stored this frame
768 * As AMSDU is either received or not as whole, logic is simple:
769 * If we have frames in that position in the buffer and the last frame
770 * originated from AMSDU had a different SN then it is a retransmission.
771 * If it is the same SN then if the subframe index is incrementing it
772 * is the same AMSDU - otherwise it is a retransmission.
773 */
774 tail = skb_peek_tail(&entries[index].e.frames);
775 if (tail && !amsdu)
776 goto drop;
777 else if (tail && (sn != buffer->last_amsdu ||
778 buffer->last_sub_index >= sub_frame_idx))
779 goto drop;
780
781 /* put in reorder buffer */
782 __skb_queue_tail(&entries[index].e.frames, skb);
783 buffer->num_stored++;
784 entries[index].e.reorder_time = jiffies;
785
786 if (amsdu) {
787 buffer->last_amsdu = sn;
788 buffer->last_sub_index = sub_frame_idx;
789 }
790
791 /*
792 * We cannot trust NSSN for AMSDU sub-frames that are not the last.
793 * The reason is that NSSN advances on the first sub-frame, and may
794 * cause the reorder buffer to advance before all the sub-frames arrive.
795 * Example: reorder buffer contains SN 0 & 2, and we receive AMSDU with
796 * SN 1. NSSN for first sub frame will be 3 with the result of driver
797 * releasing SN 0,1, 2. When sub-frame 1 arrives - reorder buffer is
798 * already ahead and it will be dropped.
799 * If the last sub-frame is not on this queue - we will get frame
800 * release notification with up to date NSSN.
801 */
802 if (!amsdu || last_subframe)
803 iwl_mvm_release_frames(mvm, sta, napi, baid_data, buffer, nssn);
804
805 spin_unlock_bh(&buffer->lock);
806 return true;
807
808 drop:
809 kfree_skb(skb);
810 spin_unlock_bh(&buffer->lock);
811 return true;
812 }
813
iwl_mvm_agg_rx_received(struct iwl_mvm * mvm,u32 reorder_data,u8 baid)814 static void iwl_mvm_agg_rx_received(struct iwl_mvm *mvm,
815 u32 reorder_data, u8 baid)
816 {
817 unsigned long now = jiffies;
818 unsigned long timeout;
819 struct iwl_mvm_baid_data *data;
820
821 rcu_read_lock();
822
823 data = rcu_dereference(mvm->baid_map[baid]);
824 if (!data) {
825 IWL_DEBUG_RX(mvm,
826 "Got valid BAID but no baid allocated, bypass the re-ordering buffer. Baid %d reorder 0x%x\n",
827 baid, reorder_data);
828 goto out;
829 }
830
831 if (!data->timeout)
832 goto out;
833
834 timeout = data->timeout;
835 /*
836 * Do not update last rx all the time to avoid cache bouncing
837 * between the rx queues.
838 * Update it every timeout. Worst case is the session will
839 * expire after ~ 2 * timeout, which doesn't matter that much.
840 */
841 if (time_before(data->last_rx + TU_TO_JIFFIES(timeout), now))
842 /* Update is atomic */
843 data->last_rx = now;
844
845 out:
846 rcu_read_unlock();
847 }
848
iwl_mvm_flip_address(u8 * addr)849 static void iwl_mvm_flip_address(u8 *addr)
850 {
851 int i;
852 u8 mac_addr[ETH_ALEN];
853
854 for (i = 0; i < ETH_ALEN; i++)
855 mac_addr[i] = addr[ETH_ALEN - i - 1];
856 ether_addr_copy(addr, mac_addr);
857 }
858
iwl_mvm_rx_mpdu_mq(struct iwl_mvm * mvm,struct napi_struct * napi,struct iwl_rx_cmd_buffer * rxb,int queue)859 void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi,
860 struct iwl_rx_cmd_buffer *rxb, int queue)
861 {
862 struct ieee80211_rx_status *rx_status;
863 struct iwl_rx_packet *pkt = rxb_addr(rxb);
864 struct iwl_rx_mpdu_desc *desc = (void *)pkt->data;
865 struct ieee80211_hdr *hdr;
866 u32 len = le16_to_cpu(desc->mpdu_len);
867 u32 rate_n_flags, gp2_on_air_rise;
868 u16 phy_info = le16_to_cpu(desc->phy_info);
869 struct ieee80211_sta *sta = NULL;
870 struct sk_buff *skb;
871 u8 crypt_len = 0, channel, energy_a, energy_b;
872 struct ieee80211_radiotap_he *he = NULL;
873 struct ieee80211_radiotap_he_mu *he_mu = NULL;
874 u32 he_type = 0xffffffff;
875 /* this is invalid e.g. because puncture type doesn't allow 0b11 */
876 #define HE_PHY_DATA_INVAL ((u64)-1)
877 u64 he_phy_data = HE_PHY_DATA_INVAL;
878 size_t desc_size;
879
880 if (unlikely(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)))
881 return;
882
883 if (mvm->trans->cfg->device_family >= IWL_DEVICE_FAMILY_22560) {
884 rate_n_flags = le32_to_cpu(desc->v3.rate_n_flags);
885 channel = desc->v3.channel;
886 gp2_on_air_rise = le32_to_cpu(desc->v3.gp2_on_air_rise);
887 energy_a = desc->v3.energy_a;
888 energy_b = desc->v3.energy_b;
889 desc_size = sizeof(*desc);
890 } else {
891 rate_n_flags = le32_to_cpu(desc->v1.rate_n_flags);
892 channel = desc->v1.channel;
893 gp2_on_air_rise = le32_to_cpu(desc->v1.gp2_on_air_rise);
894 energy_a = desc->v1.energy_a;
895 energy_b = desc->v1.energy_b;
896 desc_size = IWL_RX_DESC_SIZE_V1;
897 }
898
899 hdr = (void *)(pkt->data + desc_size);
900 /* Dont use dev_alloc_skb(), we'll have enough headroom once
901 * ieee80211_hdr pulled.
902 */
903 skb = alloc_skb(128, GFP_ATOMIC);
904 if (!skb) {
905 IWL_ERR(mvm, "alloc_skb failed\n");
906 return;
907 }
908
909 if (desc->mac_flags2 & IWL_RX_MPDU_MFLG2_PAD) {
910 /*
911 * If the device inserted padding it means that (it thought)
912 * the 802.11 header wasn't a multiple of 4 bytes long. In
913 * this case, reserve two bytes at the start of the SKB to
914 * align the payload properly in case we end up copying it.
915 */
916 skb_reserve(skb, 2);
917 }
918
919 rx_status = IEEE80211_SKB_RXCB(skb);
920
921 if (rate_n_flags & RATE_MCS_HE_MSK) {
922 static const struct ieee80211_radiotap_he known = {
923 .data1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_DATA_MCS_KNOWN |
924 IEEE80211_RADIOTAP_HE_DATA1_DATA_DCM_KNOWN |
925 IEEE80211_RADIOTAP_HE_DATA1_STBC_KNOWN |
926 IEEE80211_RADIOTAP_HE_DATA1_CODING_KNOWN),
927 .data2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_GI_KNOWN |
928 IEEE80211_RADIOTAP_HE_DATA2_TXBF_KNOWN),
929 };
930 static const struct ieee80211_radiotap_he_mu mu_known = {
931 .flags1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_MCS_KNOWN |
932 IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_DCM_KNOWN |
933 IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_SYMS_USERS_KNOWN |
934 IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_COMP_KNOWN),
935 .flags2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_MU_FLAGS2_PUNC_FROM_SIG_A_BW_KNOWN),
936 };
937 unsigned int radiotap_len = 0;
938
939 he = skb_put_data(skb, &known, sizeof(known));
940 radiotap_len += sizeof(known);
941 rx_status->flag |= RX_FLAG_RADIOTAP_HE;
942
943 he_type = rate_n_flags & RATE_MCS_HE_TYPE_MSK;
944
945 if (phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD) {
946 if (mvm->trans->cfg->device_family >=
947 IWL_DEVICE_FAMILY_22560)
948 he_phy_data = le64_to_cpu(desc->v3.he_phy_data);
949 else
950 he_phy_data = le64_to_cpu(desc->v1.he_phy_data);
951
952 if (he_type == RATE_MCS_HE_TYPE_MU) {
953 he_mu = skb_put_data(skb, &mu_known,
954 sizeof(mu_known));
955 radiotap_len += sizeof(mu_known);
956 rx_status->flag |= RX_FLAG_RADIOTAP_HE_MU;
957 }
958 }
959
960 /* temporarily hide the radiotap data */
961 __skb_pull(skb, radiotap_len);
962 }
963
964 rx_status = IEEE80211_SKB_RXCB(skb);
965
966 if (iwl_mvm_rx_crypto(mvm, hdr, rx_status, phy_info, desc,
967 le32_to_cpu(pkt->len_n_flags), queue,
968 &crypt_len)) {
969 kfree_skb(skb);
970 return;
971 }
972
973 /*
974 * Keep packets with CRC errors (and with overrun) for monitor mode
975 * (otherwise the firmware discards them) but mark them as bad.
976 */
977 if (!(desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_CRC_OK)) ||
978 !(desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_OVERRUN_OK))) {
979 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n",
980 le16_to_cpu(desc->status));
981 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
982 }
983 /* set the preamble flag if appropriate */
984 if (phy_info & IWL_RX_MPDU_PHY_SHORT_PREAMBLE)
985 rx_status->enc_flags |= RX_ENC_FLAG_SHORTPRE;
986
987 if (likely(!(phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD))) {
988 u64 tsf_on_air_rise;
989
990 if (mvm->trans->cfg->device_family >= IWL_DEVICE_FAMILY_22560)
991 tsf_on_air_rise = le64_to_cpu(desc->v3.tsf_on_air_rise);
992 else
993 tsf_on_air_rise = le64_to_cpu(desc->v1.tsf_on_air_rise);
994
995 rx_status->mactime = tsf_on_air_rise;
996 /* TSF as indicated by the firmware is at INA time */
997 rx_status->flag |= RX_FLAG_MACTIME_PLCP_START;
998 } else if (he_type == RATE_MCS_HE_TYPE_SU) {
999 u64 he_phy_data;
1000
1001 if (mvm->trans->cfg->device_family >= IWL_DEVICE_FAMILY_22560)
1002 he_phy_data = le64_to_cpu(desc->v3.he_phy_data);
1003 else
1004 he_phy_data = le64_to_cpu(desc->v1.he_phy_data);
1005
1006 he->data1 |=
1007 cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_UL_DL_KNOWN);
1008 if (FIELD_GET(IWL_RX_HE_PHY_UPLINK,
1009 he_phy_data))
1010 he->data3 |=
1011 cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA3_UL_DL);
1012
1013 if (!queue && !(phy_info & IWL_RX_MPDU_PHY_AMPDU)) {
1014 rx_status->ampdu_reference = mvm->ampdu_ref;
1015 mvm->ampdu_ref++;
1016
1017 rx_status->flag |= RX_FLAG_AMPDU_DETAILS;
1018 rx_status->flag |= RX_FLAG_AMPDU_EOF_BIT_KNOWN;
1019 if (FIELD_GET(IWL_RX_HE_PHY_DELIM_EOF,
1020 he_phy_data))
1021 rx_status->flag |= RX_FLAG_AMPDU_EOF_BIT;
1022 }
1023 } else if (he_mu && he_phy_data != HE_PHY_DATA_INVAL) {
1024 he_mu->flags1 |=
1025 le16_encode_bits(FIELD_GET(IWL_RX_HE_PHY_SIBG_SYM_OR_USER_NUM_MASK,
1026 he_phy_data),
1027 IEEE80211_RADIOTAP_HE_MU_FLAGS2_SIG_B_SYMS_USERS);
1028 he_mu->flags1 |=
1029 le16_encode_bits(FIELD_GET(IWL_RX_HE_PHY_SIGB_DCM,
1030 he_phy_data),
1031 IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_DCM);
1032 he_mu->flags1 |=
1033 le16_encode_bits(FIELD_GET(IWL_RX_HE_PHY_SIGB_MCS_MASK,
1034 he_phy_data),
1035 IEEE80211_RADIOTAP_HE_MU_FLAGS1_SIG_B_MCS);
1036 he_mu->flags2 |=
1037 le16_encode_bits(FIELD_GET(IWL_RX_HE_PHY_SIGB_COMPRESSION,
1038 he_phy_data),
1039 IEEE80211_RADIOTAP_HE_MU_FLAGS2_SIG_B_COMP);
1040 he_mu->flags2 |=
1041 le16_encode_bits(FIELD_GET(IWL_RX_HE_PHY_PREAMBLE_PUNC_TYPE_MASK,
1042 he_phy_data),
1043 IEEE80211_RADIOTAP_HE_MU_FLAGS2_PUNC_FROM_SIG_A_BW);
1044 }
1045 rx_status->device_timestamp = gp2_on_air_rise;
1046 rx_status->band = channel > 14 ? NL80211_BAND_5GHZ :
1047 NL80211_BAND_2GHZ;
1048 rx_status->freq = ieee80211_channel_to_frequency(channel,
1049 rx_status->band);
1050 iwl_mvm_get_signal_strength(mvm, rx_status, rate_n_flags, energy_a,
1051 energy_b);
1052
1053 /* update aggregation data for monitor sake on default queue */
1054 if (!queue && (phy_info & IWL_RX_MPDU_PHY_AMPDU)) {
1055 bool toggle_bit = phy_info & IWL_RX_MPDU_PHY_AMPDU_TOGGLE;
1056 u64 he_phy_data;
1057
1058 if (mvm->trans->cfg->device_family >= IWL_DEVICE_FAMILY_22560)
1059 he_phy_data = le64_to_cpu(desc->v3.he_phy_data);
1060 else
1061 he_phy_data = le64_to_cpu(desc->v1.he_phy_data);
1062
1063 rx_status->flag |= RX_FLAG_AMPDU_DETAILS;
1064 rx_status->ampdu_reference = mvm->ampdu_ref;
1065 /* toggle is switched whenever new aggregation starts */
1066 if (toggle_bit != mvm->ampdu_toggle) {
1067 mvm->ampdu_ref++;
1068 mvm->ampdu_toggle = toggle_bit;
1069
1070 if (he_phy_data != HE_PHY_DATA_INVAL &&
1071 he_type == RATE_MCS_HE_TYPE_MU) {
1072 rx_status->flag |= RX_FLAG_AMPDU_EOF_BIT_KNOWN;
1073 if (FIELD_GET(IWL_RX_HE_PHY_DELIM_EOF,
1074 he_phy_data))
1075 rx_status->flag |=
1076 RX_FLAG_AMPDU_EOF_BIT;
1077 }
1078 }
1079 }
1080
1081 rcu_read_lock();
1082
1083 if (desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_SRC_STA_FOUND)) {
1084 u8 id = desc->sta_id_flags & IWL_RX_MPDU_SIF_STA_ID_MASK;
1085
1086 if (!WARN_ON_ONCE(id >= ARRAY_SIZE(mvm->fw_id_to_mac_id))) {
1087 sta = rcu_dereference(mvm->fw_id_to_mac_id[id]);
1088 if (IS_ERR(sta))
1089 sta = NULL;
1090 }
1091 } else if (!is_multicast_ether_addr(hdr->addr2)) {
1092 /*
1093 * This is fine since we prevent two stations with the same
1094 * address from being added.
1095 */
1096 sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL);
1097 }
1098
1099 if (sta) {
1100 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1101 struct ieee80211_vif *tx_blocked_vif =
1102 rcu_dereference(mvm->csa_tx_blocked_vif);
1103 u8 baid = (u8)((le32_to_cpu(desc->reorder_data) &
1104 IWL_RX_MPDU_REORDER_BAID_MASK) >>
1105 IWL_RX_MPDU_REORDER_BAID_SHIFT);
1106
1107 if (!mvm->tcm.paused && len >= sizeof(*hdr) &&
1108 !is_multicast_ether_addr(hdr->addr1) &&
1109 ieee80211_is_data(hdr->frame_control) &&
1110 time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD))
1111 schedule_delayed_work(&mvm->tcm.work, 0);
1112
1113 /*
1114 * We have tx blocked stations (with CS bit). If we heard
1115 * frames from a blocked station on a new channel we can
1116 * TX to it again.
1117 */
1118 if (unlikely(tx_blocked_vif) &&
1119 tx_blocked_vif == mvmsta->vif) {
1120 struct iwl_mvm_vif *mvmvif =
1121 iwl_mvm_vif_from_mac80211(tx_blocked_vif);
1122
1123 if (mvmvif->csa_target_freq == rx_status->freq)
1124 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta,
1125 false);
1126 }
1127
1128 rs_update_last_rssi(mvm, mvmsta, rx_status);
1129
1130 if (iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_RSSI) &&
1131 ieee80211_is_beacon(hdr->frame_control)) {
1132 struct iwl_fw_dbg_trigger_tlv *trig;
1133 struct iwl_fw_dbg_trigger_low_rssi *rssi_trig;
1134 bool trig_check;
1135 s32 rssi;
1136
1137 trig = iwl_fw_dbg_get_trigger(mvm->fw,
1138 FW_DBG_TRIGGER_RSSI);
1139 rssi_trig = (void *)trig->data;
1140 rssi = le32_to_cpu(rssi_trig->rssi);
1141
1142 trig_check =
1143 iwl_fw_dbg_trigger_check_stop(&mvm->fwrt,
1144 ieee80211_vif_to_wdev(mvmsta->vif),
1145 trig);
1146 if (trig_check && rx_status->signal < rssi)
1147 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
1148 NULL);
1149 }
1150
1151 if (ieee80211_is_data(hdr->frame_control))
1152 iwl_mvm_rx_csum(sta, skb, desc);
1153
1154 if (iwl_mvm_is_dup(sta, queue, rx_status, hdr, desc)) {
1155 kfree_skb(skb);
1156 goto out;
1157 }
1158
1159 /*
1160 * Our hardware de-aggregates AMSDUs but copies the mac header
1161 * as it to the de-aggregated MPDUs. We need to turn off the
1162 * AMSDU bit in the QoS control ourselves.
1163 * In addition, HW reverses addr3 and addr4 - reverse it back.
1164 */
1165 if ((desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU) &&
1166 !WARN_ON(!ieee80211_is_data_qos(hdr->frame_control))) {
1167 u8 *qc = ieee80211_get_qos_ctl(hdr);
1168
1169 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
1170
1171 if (mvm->trans->cfg->device_family ==
1172 IWL_DEVICE_FAMILY_9000) {
1173 iwl_mvm_flip_address(hdr->addr3);
1174
1175 if (ieee80211_has_a4(hdr->frame_control))
1176 iwl_mvm_flip_address(hdr->addr4);
1177 }
1178 }
1179 if (baid != IWL_RX_REORDER_DATA_INVALID_BAID) {
1180 u32 reorder_data = le32_to_cpu(desc->reorder_data);
1181
1182 iwl_mvm_agg_rx_received(mvm, reorder_data, baid);
1183 }
1184 }
1185
1186 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
1187 case RATE_MCS_CHAN_WIDTH_20:
1188 break;
1189 case RATE_MCS_CHAN_WIDTH_40:
1190 rx_status->bw = RATE_INFO_BW_40;
1191 break;
1192 case RATE_MCS_CHAN_WIDTH_80:
1193 rx_status->bw = RATE_INFO_BW_80;
1194 break;
1195 case RATE_MCS_CHAN_WIDTH_160:
1196 rx_status->bw = RATE_INFO_BW_160;
1197 break;
1198 }
1199
1200 if (he_type == RATE_MCS_HE_TYPE_EXT_SU &&
1201 rate_n_flags & RATE_MCS_HE_106T_MSK) {
1202 rx_status->bw = RATE_INFO_BW_HE_RU;
1203 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_106;
1204 }
1205
1206 if (rate_n_flags & RATE_MCS_HE_MSK &&
1207 phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD &&
1208 he_type == RATE_MCS_HE_TYPE_MU) {
1209 /*
1210 * Unfortunately, we have to leave the mac80211 data
1211 * incorrect for the case that we receive an HE-MU
1212 * transmission and *don't* have the he_mu pointer,
1213 * i.e. we don't have the phy data (due to the bits
1214 * being used for TSF). This shouldn't happen though
1215 * as management frames where we need the TSF/timers
1216 * are not be transmitted in HE-MU, I think.
1217 */
1218 u8 ru = FIELD_GET(IWL_RX_HE_PHY_RU_ALLOC_MASK, he_phy_data);
1219 u8 offs = 0;
1220
1221 rx_status->bw = RATE_INFO_BW_HE_RU;
1222
1223 switch (ru) {
1224 case 0 ... 36:
1225 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_26;
1226 offs = ru;
1227 break;
1228 case 37 ... 52:
1229 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_52;
1230 offs = ru - 37;
1231 break;
1232 case 53 ... 60:
1233 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_106;
1234 offs = ru - 53;
1235 break;
1236 case 61 ... 64:
1237 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_242;
1238 offs = ru - 61;
1239 break;
1240 case 65 ... 66:
1241 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_484;
1242 offs = ru - 65;
1243 break;
1244 case 67:
1245 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_996;
1246 break;
1247 case 68:
1248 rx_status->he_ru = NL80211_RATE_INFO_HE_RU_ALLOC_2x996;
1249 break;
1250 }
1251 he->data2 |=
1252 le16_encode_bits(offs,
1253 IEEE80211_RADIOTAP_HE_DATA2_RU_OFFSET);
1254 he->data2 |=
1255 cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_PRISEC_80_KNOWN);
1256 if (he_phy_data & IWL_RX_HE_PHY_RU_ALLOC_SEC80)
1257 he->data2 |=
1258 cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_PRISEC_80_SEC);
1259 } else if (he) {
1260 he->data1 |=
1261 cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_BW_RU_ALLOC_KNOWN);
1262 }
1263
1264 if (!(rate_n_flags & RATE_MCS_CCK_MSK) &&
1265 rate_n_flags & RATE_MCS_SGI_MSK)
1266 rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
1267 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
1268 rx_status->enc_flags |= RX_ENC_FLAG_HT_GF;
1269 if (rate_n_flags & RATE_MCS_LDPC_MSK)
1270 rx_status->enc_flags |= RX_ENC_FLAG_LDPC;
1271 if (rate_n_flags & RATE_MCS_HT_MSK) {
1272 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >>
1273 RATE_MCS_STBC_POS;
1274 rx_status->encoding = RX_ENC_HT;
1275 rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
1276 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
1277 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
1278 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >>
1279 RATE_MCS_STBC_POS;
1280 rx_status->nss =
1281 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
1282 RATE_VHT_MCS_NSS_POS) + 1;
1283 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;
1284 rx_status->encoding = RX_ENC_VHT;
1285 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
1286 if (rate_n_flags & RATE_MCS_BF_MSK)
1287 rx_status->enc_flags |= RX_ENC_FLAG_BF;
1288 } else if (he) {
1289 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >>
1290 RATE_MCS_STBC_POS;
1291 rx_status->nss =
1292 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
1293 RATE_VHT_MCS_NSS_POS) + 1;
1294 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;
1295 rx_status->encoding = RX_ENC_HE;
1296 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
1297 if (rate_n_flags & RATE_MCS_BF_MSK)
1298 rx_status->enc_flags |= RX_ENC_FLAG_BF;
1299
1300 rx_status->he_dcm =
1301 !!(rate_n_flags & RATE_HE_DUAL_CARRIER_MODE_MSK);
1302
1303 #define CHECK_TYPE(F) \
1304 BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA1_FORMAT_ ## F != \
1305 (RATE_MCS_HE_TYPE_ ## F >> RATE_MCS_HE_TYPE_POS))
1306
1307 CHECK_TYPE(SU);
1308 CHECK_TYPE(EXT_SU);
1309 CHECK_TYPE(MU);
1310 CHECK_TYPE(TRIG);
1311
1312 he->data1 |= cpu_to_le16(he_type >> RATE_MCS_HE_TYPE_POS);
1313
1314 if (rate_n_flags & RATE_MCS_BF_POS)
1315 he->data5 |= cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA5_TXBF);
1316
1317 switch ((rate_n_flags & RATE_MCS_HE_GI_LTF_MSK) >>
1318 RATE_MCS_HE_GI_LTF_POS) {
1319 case 0:
1320 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_0_8;
1321 break;
1322 case 1:
1323 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_0_8;
1324 break;
1325 case 2:
1326 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_1_6;
1327 break;
1328 case 3:
1329 if (rate_n_flags & RATE_MCS_SGI_MSK)
1330 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_0_8;
1331 else
1332 rx_status->he_gi = NL80211_RATE_INFO_HE_GI_3_2;
1333 break;
1334 }
1335
1336 switch (he_type) {
1337 case RATE_MCS_HE_TYPE_SU: {
1338 u16 val;
1339
1340 /* LTF syms correspond to streams */
1341 he->data2 |=
1342 cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_NUM_LTF_SYMS_KNOWN);
1343 switch (rx_status->nss) {
1344 case 1:
1345 val = 0;
1346 break;
1347 case 2:
1348 val = 1;
1349 break;
1350 case 3:
1351 case 4:
1352 val = 2;
1353 break;
1354 case 5:
1355 case 6:
1356 val = 3;
1357 break;
1358 case 7:
1359 case 8:
1360 val = 4;
1361 break;
1362 default:
1363 WARN_ONCE(1, "invalid nss: %d\n",
1364 rx_status->nss);
1365 val = 0;
1366 }
1367 he->data5 |=
1368 le16_encode_bits(val,
1369 IEEE80211_RADIOTAP_HE_DATA5_NUM_LTF_SYMS);
1370 }
1371 break;
1372 case RATE_MCS_HE_TYPE_MU: {
1373 u16 val;
1374 u64 he_phy_data;
1375
1376 if (mvm->trans->cfg->device_family >=
1377 IWL_DEVICE_FAMILY_22560)
1378 he_phy_data = le64_to_cpu(desc->v3.he_phy_data);
1379 else
1380 he_phy_data = le64_to_cpu(desc->v1.he_phy_data);
1381
1382 if (he_phy_data == HE_PHY_DATA_INVAL)
1383 break;
1384
1385 val = FIELD_GET(IWL_RX_HE_PHY_HE_LTF_NUM_MASK,
1386 he_phy_data);
1387
1388 he->data2 |=
1389 cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_NUM_LTF_SYMS_KNOWN);
1390 he->data5 |=
1391 cpu_to_le16(FIELD_PREP(
1392 IEEE80211_RADIOTAP_HE_DATA5_NUM_LTF_SYMS,
1393 val));
1394 }
1395 break;
1396 case RATE_MCS_HE_TYPE_EXT_SU:
1397 case RATE_MCS_HE_TYPE_TRIG:
1398 /* not supported yet */
1399 break;
1400 }
1401 } else {
1402 int rate = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
1403 rx_status->band);
1404
1405 if (WARN(rate < 0 || rate > 0xFF,
1406 "Invalid rate flags 0x%x, band %d,\n",
1407 rate_n_flags, rx_status->band)) {
1408 kfree_skb(skb);
1409 goto out;
1410 }
1411 rx_status->rate_idx = rate;
1412
1413 }
1414
1415 /* management stuff on default queue */
1416 if (!queue) {
1417 if (unlikely((ieee80211_is_beacon(hdr->frame_control) ||
1418 ieee80211_is_probe_resp(hdr->frame_control)) &&
1419 mvm->sched_scan_pass_all ==
1420 SCHED_SCAN_PASS_ALL_ENABLED))
1421 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND;
1422
1423 if (unlikely(ieee80211_is_beacon(hdr->frame_control) ||
1424 ieee80211_is_probe_resp(hdr->frame_control)))
1425 rx_status->boottime_ns = ktime_get_boot_ns();
1426 }
1427
1428 iwl_mvm_create_skb(skb, hdr, len, crypt_len, rxb);
1429 if (!iwl_mvm_reorder(mvm, napi, queue, sta, skb, desc))
1430 iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb, queue, sta);
1431 out:
1432 rcu_read_unlock();
1433 }
1434
iwl_mvm_rx_frame_release(struct iwl_mvm * mvm,struct napi_struct * napi,struct iwl_rx_cmd_buffer * rxb,int queue)1435 void iwl_mvm_rx_frame_release(struct iwl_mvm *mvm, struct napi_struct *napi,
1436 struct iwl_rx_cmd_buffer *rxb, int queue)
1437 {
1438 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1439 struct iwl_frame_release *release = (void *)pkt->data;
1440 struct ieee80211_sta *sta;
1441 struct iwl_mvm_reorder_buffer *reorder_buf;
1442 struct iwl_mvm_baid_data *ba_data;
1443
1444 int baid = release->baid;
1445
1446 IWL_DEBUG_HT(mvm, "Frame release notification for BAID %u, NSSN %d\n",
1447 release->baid, le16_to_cpu(release->nssn));
1448
1449 if (WARN_ON_ONCE(baid == IWL_RX_REORDER_DATA_INVALID_BAID))
1450 return;
1451
1452 rcu_read_lock();
1453
1454 ba_data = rcu_dereference(mvm->baid_map[baid]);
1455 if (WARN_ON_ONCE(!ba_data))
1456 goto out;
1457
1458 sta = rcu_dereference(mvm->fw_id_to_mac_id[ba_data->sta_id]);
1459 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
1460 goto out;
1461
1462 reorder_buf = &ba_data->reorder_buf[queue];
1463
1464 spin_lock_bh(&reorder_buf->lock);
1465 iwl_mvm_release_frames(mvm, sta, napi, ba_data, reorder_buf,
1466 le16_to_cpu(release->nssn));
1467 spin_unlock_bh(&reorder_buf->lock);
1468
1469 out:
1470 rcu_read_unlock();
1471 }
1472
