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"
67 static inline int iwl_mvm_check_pn(struct iwl_mvm *mvm, struct sk_buff *skb,
68 int queue, struct ieee80211_sta *sta)
70 struct iwl_mvm_sta *mvmsta;
71 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
72 struct ieee80211_rx_status *stats = IEEE80211_SKB_RXCB(skb);
73 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 res = memcmp(pn, ptk_pn->q[queue].pn[tid], IEEE80211_CCMP_PN_LEN);
134 if (!res && !(stats->flag & RX_FLAG_ALLOW_SAME_PN))
137 memcpy(ptk_pn->q[queue].pn[tid], pn, IEEE80211_CCMP_PN_LEN);
138 stats->flag |= RX_FLAG_PN_VALIDATED;
143 /* iwl_mvm_create_skb Adds the rxb to a new skb */
144 static int iwl_mvm_create_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
145 struct ieee80211_hdr *hdr, u16 len, u8 crypt_len,
146 struct iwl_rx_cmd_buffer *rxb)
148 struct iwl_rx_packet *pkt = rxb_addr(rxb);
149 struct iwl_rx_mpdu_desc *desc = (void *)pkt->data;
150 unsigned int headlen, fraglen, pad_len = 0;
151 unsigned int hdrlen = ieee80211_hdrlen(hdr->frame_control);
153 if (desc->mac_flags2 & IWL_RX_MPDU_MFLG2_PAD) {
157 * If the device inserted padding it means that (it thought)
158 * the 802.11 header wasn't a multiple of 4 bytes long. In
159 * this case, reserve two bytes at the start of the SKB to
160 * align the payload properly in case we end up copying it.
162 skb_reserve(skb, pad_len);
166 /* If frame is small enough to fit in skb->head, pull it completely.
167 * If not, only pull ieee80211_hdr (including crypto if present, and
168 * an additional 8 bytes for SNAP/ethertype, see below) so that
169 * splice() or TCP coalesce are more efficient.
171 * Since, in addition, ieee80211_data_to_8023() always pull in at
172 * least 8 bytes (possibly more for mesh) we can do the same here
173 * to save the cost of doing it later. That still doesn't pull in
174 * the actual IP header since the typical case has a SNAP header.
175 * If the latter changes (there are efforts in the standards group
176 * to do so) we should revisit this and ieee80211_data_to_8023().
178 headlen = (len <= skb_tailroom(skb)) ? len :
179 hdrlen + crypt_len + 8;
181 /* The firmware may align the packet to DWORD.
182 * The padding is inserted after the IV.
183 * After copying the header + IV skip the padding if
184 * present before copying packet data.
188 if (WARN_ONCE(headlen < hdrlen,
189 "invalid packet lengths (hdrlen=%d, len=%d, crypt_len=%d)\n",
190 hdrlen, len, crypt_len)) {
192 * We warn and trace because we want to be able to see
193 * it in trace-cmd as well.
196 "invalid packet lengths (hdrlen=%d, len=%d, crypt_len=%d)\n",
197 hdrlen, len, crypt_len);
201 skb_put_data(skb, hdr, hdrlen);
202 skb_put_data(skb, (u8 *)hdr + hdrlen + pad_len, headlen - hdrlen);
204 fraglen = len - headlen;
207 int offset = (void *)hdr + headlen + pad_len -
208 rxb_addr(rxb) + rxb_offset(rxb);
210 skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset,
211 fraglen, rxb->truesize);
217 /* iwl_mvm_pass_packet_to_mac80211 - passes the packet for mac80211 */
218 static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm,
219 struct napi_struct *napi,
220 struct sk_buff *skb, int queue,
221 struct ieee80211_sta *sta)
223 if (iwl_mvm_check_pn(mvm, skb, queue, sta))
226 ieee80211_rx_napi(mvm->hw, sta, skb, napi);
229 static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm,
230 struct iwl_rx_mpdu_desc *desc,
231 struct ieee80211_rx_status *rx_status)
233 int energy_a, energy_b, max_energy;
235 energy_a = desc->energy_a;
236 energy_a = energy_a ? -energy_a : S8_MIN;
237 energy_b = desc->energy_b;
238 energy_b = energy_b ? -energy_b : S8_MIN;
239 max_energy = max(energy_a, energy_b);
241 IWL_DEBUG_STATS(mvm, "energy In A %d B %d, and max %d\n",
242 energy_a, energy_b, max_energy);
244 rx_status->signal = max_energy;
245 rx_status->chains = 0; /* TODO: phy info */
246 rx_status->chain_signal[0] = energy_a;
247 rx_status->chain_signal[1] = energy_b;
248 rx_status->chain_signal[2] = S8_MIN;
251 static int iwl_mvm_rx_crypto(struct iwl_mvm *mvm, struct ieee80211_hdr *hdr,
252 struct ieee80211_rx_status *stats,
253 struct iwl_rx_mpdu_desc *desc, u32 pkt_flags,
254 int queue, u8 *crypt_len)
256 u16 status = le16_to_cpu(desc->status);
258 if (!ieee80211_has_protected(hdr->frame_control) ||
259 (status & IWL_RX_MPDU_STATUS_SEC_MASK) ==
260 IWL_RX_MPDU_STATUS_SEC_NONE)
263 /* TODO: handle packets encrypted with unknown alg */
265 switch (status & IWL_RX_MPDU_STATUS_SEC_MASK) {
266 case IWL_RX_MPDU_STATUS_SEC_CCM:
267 case IWL_RX_MPDU_STATUS_SEC_GCM:
268 BUILD_BUG_ON(IEEE80211_CCMP_PN_LEN != IEEE80211_GCMP_PN_LEN);
269 /* alg is CCM: check MIC only */
270 if (!(status & IWL_RX_MPDU_STATUS_MIC_OK))
273 stats->flag |= RX_FLAG_DECRYPTED;
274 if (pkt_flags & FH_RSCSR_RADA_EN)
275 stats->flag |= RX_FLAG_MIC_STRIPPED;
276 *crypt_len = IEEE80211_CCMP_HDR_LEN;
278 case IWL_RX_MPDU_STATUS_SEC_TKIP:
279 /* Don't drop the frame and decrypt it in SW */
280 if (!(status & IWL_RX_MPDU_RES_STATUS_TTAK_OK))
283 *crypt_len = IEEE80211_TKIP_IV_LEN;
284 /* fall through if TTAK OK */
285 case IWL_RX_MPDU_STATUS_SEC_WEP:
286 if (!(status & IWL_RX_MPDU_STATUS_ICV_OK))
289 stats->flag |= RX_FLAG_DECRYPTED;
290 if ((status & IWL_RX_MPDU_STATUS_SEC_MASK) ==
291 IWL_RX_MPDU_STATUS_SEC_WEP)
292 *crypt_len = IEEE80211_WEP_IV_LEN;
294 if (pkt_flags & FH_RSCSR_RADA_EN)
295 stats->flag |= RX_FLAG_ICV_STRIPPED;
298 case IWL_RX_MPDU_STATUS_SEC_EXT_ENC:
299 if (!(status & IWL_RX_MPDU_STATUS_MIC_OK))
301 stats->flag |= RX_FLAG_DECRYPTED;
304 /* Expected in monitor (not having the keys) */
305 if (!mvm->monitor_on)
306 IWL_ERR(mvm, "Unhandled alg: 0x%x\n", status);
312 static void iwl_mvm_rx_csum(struct ieee80211_sta *sta,
314 struct iwl_rx_mpdu_desc *desc)
316 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
317 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
318 u16 flags = le16_to_cpu(desc->l3l4_flags);
319 u8 l3_prot = (u8)((flags & IWL_RX_L3L4_L3_PROTO_MASK) >>
320 IWL_RX_L3_PROTO_POS);
322 if (mvmvif->features & NETIF_F_RXCSUM &&
323 flags & IWL_RX_L3L4_TCP_UDP_CSUM_OK &&
324 (flags & IWL_RX_L3L4_IP_HDR_CSUM_OK ||
325 l3_prot == IWL_RX_L3_TYPE_IPV6 ||
326 l3_prot == IWL_RX_L3_TYPE_IPV6_FRAG))
327 skb->ip_summed = CHECKSUM_UNNECESSARY;
331 * returns true if a packet is a duplicate and should be dropped.
332 * Updates AMSDU PN tracking info
334 static bool iwl_mvm_is_dup(struct ieee80211_sta *sta, int queue,
335 struct ieee80211_rx_status *rx_status,
336 struct ieee80211_hdr *hdr,
337 struct iwl_rx_mpdu_desc *desc)
339 struct iwl_mvm_sta *mvm_sta;
340 struct iwl_mvm_rxq_dup_data *dup_data;
341 u8 tid, sub_frame_idx;
343 if (WARN_ON(IS_ERR_OR_NULL(sta)))
346 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
347 dup_data = &mvm_sta->dup_data[queue];
350 * Drop duplicate 802.11 retransmissions
351 * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery")
353 if (ieee80211_is_ctl(hdr->frame_control) ||
354 ieee80211_is_qos_nullfunc(hdr->frame_control) ||
355 is_multicast_ether_addr(hdr->addr1)) {
356 rx_status->flag |= RX_FLAG_DUP_VALIDATED;
360 if (ieee80211_is_data_qos(hdr->frame_control))
361 /* frame has qos control */
362 tid = *ieee80211_get_qos_ctl(hdr) &
363 IEEE80211_QOS_CTL_TID_MASK;
365 tid = IWL_MAX_TID_COUNT;
367 /* If this wasn't a part of an A-MSDU the sub-frame index will be 0 */
368 sub_frame_idx = desc->amsdu_info & IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK;
370 if (unlikely(ieee80211_has_retry(hdr->frame_control) &&
371 dup_data->last_seq[tid] == hdr->seq_ctrl &&
372 dup_data->last_sub_frame[tid] >= sub_frame_idx))
375 /* Allow same PN as the first subframe for following sub frames */
376 if (dup_data->last_seq[tid] == hdr->seq_ctrl &&
377 sub_frame_idx > dup_data->last_sub_frame[tid] &&
378 desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU)
379 rx_status->flag |= RX_FLAG_ALLOW_SAME_PN;
381 dup_data->last_seq[tid] = hdr->seq_ctrl;
382 dup_data->last_sub_frame[tid] = sub_frame_idx;
384 rx_status->flag |= RX_FLAG_DUP_VALIDATED;
389 int iwl_mvm_notify_rx_queue(struct iwl_mvm *mvm, u32 rxq_mask,
390 const u8 *data, u32 count)
392 struct iwl_rxq_sync_cmd *cmd;
393 u32 data_size = sizeof(*cmd) + count;
396 /* should be DWORD aligned */
397 if (WARN_ON(count & 3 || count > IWL_MULTI_QUEUE_SYNC_MSG_MAX_SIZE))
400 cmd = kzalloc(data_size, GFP_KERNEL);
404 cmd->rxq_mask = cpu_to_le32(rxq_mask);
405 cmd->count = cpu_to_le32(count);
407 memcpy(cmd->payload, data, count);
409 ret = iwl_mvm_send_cmd_pdu(mvm,
410 WIDE_ID(DATA_PATH_GROUP,
411 TRIGGER_RX_QUEUES_NOTIF_CMD),
419 * Returns true if sn2 - buffer_size < sn1 < sn2.
420 * To be used only in order to compare reorder buffer head with NSSN.
421 * We fully trust NSSN unless it is behind us due to reorder timeout.
422 * Reorder timeout can only bring us up to buffer_size SNs ahead of NSSN.
424 static bool iwl_mvm_is_sn_less(u16 sn1, u16 sn2, u16 buffer_size)
426 return ieee80211_sn_less(sn1, sn2) &&
427 !ieee80211_sn_less(sn1, sn2 - buffer_size);
430 #define RX_REORDER_BUF_TIMEOUT_MQ (HZ / 10)
432 static void iwl_mvm_release_frames(struct iwl_mvm *mvm,
433 struct ieee80211_sta *sta,
434 struct napi_struct *napi,
435 struct iwl_mvm_reorder_buffer *reorder_buf,
438 u16 ssn = reorder_buf->head_sn;
440 lockdep_assert_held(&reorder_buf->lock);
442 /* ignore nssn smaller than head sn - this can happen due to timeout */
443 if (iwl_mvm_is_sn_less(nssn, ssn, reorder_buf->buf_size))
446 while (iwl_mvm_is_sn_less(ssn, nssn, reorder_buf->buf_size)) {
447 int index = ssn % reorder_buf->buf_size;
448 struct sk_buff_head *skb_list = &reorder_buf->entries[index];
451 ssn = ieee80211_sn_inc(ssn);
454 * Empty the list. Will have more than one frame for A-MSDU.
455 * Empty list is valid as well since nssn indicates frames were
458 while ((skb = __skb_dequeue(skb_list))) {
459 iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb,
462 reorder_buf->num_stored--;
465 reorder_buf->head_sn = nssn;
468 if (reorder_buf->num_stored && !reorder_buf->removed) {
469 u16 index = reorder_buf->head_sn % reorder_buf->buf_size;
471 while (skb_queue_empty(&reorder_buf->entries[index]))
472 index = (index + 1) % reorder_buf->buf_size;
473 /* modify timer to match next frame's expiration time */
474 mod_timer(&reorder_buf->reorder_timer,
475 reorder_buf->reorder_time[index] + 1 +
476 RX_REORDER_BUF_TIMEOUT_MQ);
478 del_timer(&reorder_buf->reorder_timer);
482 void iwl_mvm_reorder_timer_expired(unsigned long data)
484 struct iwl_mvm_reorder_buffer *buf = (void *)data;
486 u16 sn = 0, index = 0;
487 bool expired = false;
490 spin_lock(&buf->lock);
492 if (!buf->num_stored || buf->removed) {
493 spin_unlock(&buf->lock);
497 for (i = 0; i < buf->buf_size ; i++) {
498 index = (buf->head_sn + i) % buf->buf_size;
500 if (skb_queue_empty(&buf->entries[index])) {
502 * If there is a hole and the next frame didn't expire
503 * we want to break and not advance SN
508 if (!cont && !time_after(jiffies, buf->reorder_time[index] +
509 RX_REORDER_BUF_TIMEOUT_MQ))
513 /* continue until next hole after this expired frames */
515 sn = ieee80211_sn_add(buf->head_sn, i + 1);
519 struct ieee80211_sta *sta;
522 sta = rcu_dereference(buf->mvm->fw_id_to_mac_id[buf->sta_id]);
523 /* SN is set to the last expired frame + 1 */
524 IWL_DEBUG_HT(buf->mvm,
525 "Releasing expired frames for sta %u, sn %d\n",
527 iwl_mvm_release_frames(buf->mvm, sta, NULL, buf, sn);
531 * If no frame expired and there are stored frames, index is now
532 * pointing to the first unexpired frame - modify timer
533 * accordingly to this frame.
535 mod_timer(&buf->reorder_timer,
536 buf->reorder_time[index] +
537 1 + RX_REORDER_BUF_TIMEOUT_MQ);
539 spin_unlock(&buf->lock);
542 static void iwl_mvm_del_ba(struct iwl_mvm *mvm, int queue,
543 struct iwl_mvm_delba_data *data)
545 struct iwl_mvm_baid_data *ba_data;
546 struct ieee80211_sta *sta;
547 struct iwl_mvm_reorder_buffer *reorder_buf;
548 u8 baid = data->baid;
550 if (WARN_ONCE(baid >= IWL_MAX_BAID, "invalid BAID: %x\n", baid))
555 ba_data = rcu_dereference(mvm->baid_map[baid]);
556 if (WARN_ON_ONCE(!ba_data))
559 sta = rcu_dereference(mvm->fw_id_to_mac_id[ba_data->sta_id]);
560 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
563 reorder_buf = &ba_data->reorder_buf[queue];
565 /* release all frames that are in the reorder buffer to the stack */
566 spin_lock_bh(&reorder_buf->lock);
567 iwl_mvm_release_frames(mvm, sta, NULL, reorder_buf,
568 ieee80211_sn_add(reorder_buf->head_sn,
569 reorder_buf->buf_size));
570 spin_unlock_bh(&reorder_buf->lock);
571 del_timer_sync(&reorder_buf->reorder_timer);
577 void iwl_mvm_rx_queue_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
580 struct iwl_rx_packet *pkt = rxb_addr(rxb);
581 struct iwl_rxq_sync_notification *notif;
582 struct iwl_mvm_internal_rxq_notif *internal_notif;
584 notif = (void *)pkt->data;
585 internal_notif = (void *)notif->payload;
587 if (internal_notif->sync) {
588 if (mvm->queue_sync_cookie != internal_notif->cookie) {
590 "Received expired RX queue sync message\n");
593 if (!atomic_dec_return(&mvm->queue_sync_counter))
594 wake_up(&mvm->rx_sync_waitq);
597 switch (internal_notif->type) {
598 case IWL_MVM_RXQ_EMPTY:
600 case IWL_MVM_RXQ_NOTIF_DEL_BA:
601 iwl_mvm_del_ba(mvm, queue, (void *)internal_notif->data);
604 WARN_ONCE(1, "Invalid identifier %d", internal_notif->type);
609 * Returns true if the MPDU was buffered\dropped, false if it should be passed
612 static bool iwl_mvm_reorder(struct iwl_mvm *mvm,
613 struct napi_struct *napi,
615 struct ieee80211_sta *sta,
617 struct iwl_rx_mpdu_desc *desc)
619 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
620 struct iwl_mvm_sta *mvm_sta;
621 struct iwl_mvm_baid_data *baid_data;
622 struct iwl_mvm_reorder_buffer *buffer;
623 struct sk_buff *tail;
624 u32 reorder = le32_to_cpu(desc->reorder_data);
625 bool amsdu = desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU;
627 desc->amsdu_info & IWL_RX_MPDU_AMSDU_LAST_SUBFRAME;
628 u8 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
629 u8 sub_frame_idx = desc->amsdu_info &
630 IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK;
635 baid = (reorder & IWL_RX_MPDU_REORDER_BAID_MASK) >>
636 IWL_RX_MPDU_REORDER_BAID_SHIFT;
639 * This also covers the case of receiving a Block Ack Request
640 * outside a BA session; we'll pass it to mac80211 and that
641 * then sends a delBA action frame.
643 if (baid == IWL_RX_REORDER_DATA_INVALID_BAID)
647 if (WARN_ON(IS_ERR_OR_NULL(sta)))
650 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
652 /* not a data packet or a bar */
653 if (!ieee80211_is_back_req(hdr->frame_control) &&
654 (!ieee80211_is_data_qos(hdr->frame_control) ||
655 is_multicast_ether_addr(hdr->addr1)))
658 if (unlikely(!ieee80211_is_data_present(hdr->frame_control)))
661 baid_data = rcu_dereference(mvm->baid_map[baid]);
664 "Got valid BAID but no baid allocated, bypass the re-ordering buffer. Baid %d reorder 0x%x\n",
669 if (WARN(tid != baid_data->tid || mvm_sta->sta_id != baid_data->sta_id,
670 "baid 0x%x is mapped to sta:%d tid:%d, but was received for sta:%d tid:%d\n",
671 baid, baid_data->sta_id, baid_data->tid, mvm_sta->sta_id,
675 nssn = reorder & IWL_RX_MPDU_REORDER_NSSN_MASK;
676 sn = (reorder & IWL_RX_MPDU_REORDER_SN_MASK) >>
677 IWL_RX_MPDU_REORDER_SN_SHIFT;
679 buffer = &baid_data->reorder_buf[queue];
681 spin_lock_bh(&buffer->lock);
683 if (!buffer->valid) {
684 if (reorder & IWL_RX_MPDU_REORDER_BA_OLD_SN) {
685 spin_unlock_bh(&buffer->lock);
688 buffer->valid = true;
691 if (ieee80211_is_back_req(hdr->frame_control)) {
692 iwl_mvm_release_frames(mvm, sta, napi, buffer, nssn);
697 * If there was a significant jump in the nssn - adjust.
698 * If the SN is smaller than the NSSN it might need to first go into
699 * the reorder buffer, in which case we just release up to it and the
700 * rest of the function will take care of storing it and releasing up to
703 if (!iwl_mvm_is_sn_less(nssn, buffer->head_sn + buffer->buf_size,
705 !ieee80211_sn_less(sn, buffer->head_sn + buffer->buf_size)) {
706 u16 min_sn = ieee80211_sn_less(sn, nssn) ? sn : nssn;
708 iwl_mvm_release_frames(mvm, sta, napi, buffer, min_sn);
711 /* drop any oudated packets */
712 if (ieee80211_sn_less(sn, buffer->head_sn))
715 /* release immediately if allowed by nssn and no stored frames */
716 if (!buffer->num_stored && ieee80211_sn_less(sn, nssn)) {
717 if (iwl_mvm_is_sn_less(buffer->head_sn, nssn,
719 (!amsdu || last_subframe))
720 buffer->head_sn = nssn;
721 /* No need to update AMSDU last SN - we are moving the head */
722 spin_unlock_bh(&buffer->lock);
726 index = sn % buffer->buf_size;
729 * Check if we already stored this frame
730 * As AMSDU is either received or not as whole, logic is simple:
731 * If we have frames in that position in the buffer and the last frame
732 * originated from AMSDU had a different SN then it is a retransmission.
733 * If it is the same SN then if the subframe index is incrementing it
734 * is the same AMSDU - otherwise it is a retransmission.
736 tail = skb_peek_tail(&buffer->entries[index]);
739 else if (tail && (sn != buffer->last_amsdu ||
740 buffer->last_sub_index >= sub_frame_idx))
743 /* put in reorder buffer */
744 __skb_queue_tail(&buffer->entries[index], skb);
745 buffer->num_stored++;
746 buffer->reorder_time[index] = jiffies;
749 buffer->last_amsdu = sn;
750 buffer->last_sub_index = sub_frame_idx;
754 * We cannot trust NSSN for AMSDU sub-frames that are not the last.
755 * The reason is that NSSN advances on the first sub-frame, and may
756 * cause the reorder buffer to advance before all the sub-frames arrive.
757 * Example: reorder buffer contains SN 0 & 2, and we receive AMSDU with
758 * SN 1. NSSN for first sub frame will be 3 with the result of driver
759 * releasing SN 0,1, 2. When sub-frame 1 arrives - reorder buffer is
760 * already ahead and it will be dropped.
761 * If the last sub-frame is not on this queue - we will get frame
762 * release notification with up to date NSSN.
764 if (!amsdu || last_subframe)
765 iwl_mvm_release_frames(mvm, sta, napi, buffer, nssn);
767 spin_unlock_bh(&buffer->lock);
772 spin_unlock_bh(&buffer->lock);
776 static void iwl_mvm_agg_rx_received(struct iwl_mvm *mvm,
777 u32 reorder_data, u8 baid)
779 unsigned long now = jiffies;
780 unsigned long timeout;
781 struct iwl_mvm_baid_data *data;
785 data = rcu_dereference(mvm->baid_map[baid]);
788 "Got valid BAID but no baid allocated, bypass the re-ordering buffer. Baid %d reorder 0x%x\n",
796 timeout = data->timeout;
798 * Do not update last rx all the time to avoid cache bouncing
799 * between the rx queues.
800 * Update it every timeout. Worst case is the session will
801 * expire after ~ 2 * timeout, which doesn't matter that much.
803 if (time_before(data->last_rx + TU_TO_JIFFIES(timeout), now))
804 /* Update is atomic */
811 void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi,
812 struct iwl_rx_cmd_buffer *rxb, int queue)
814 struct ieee80211_rx_status *rx_status;
815 struct iwl_rx_packet *pkt = rxb_addr(rxb);
816 struct iwl_rx_mpdu_desc *desc = (void *)pkt->data;
817 struct ieee80211_hdr *hdr = (void *)(pkt->data + sizeof(*desc));
818 u32 len = le16_to_cpu(desc->mpdu_len);
819 u32 rate_n_flags = le32_to_cpu(desc->rate_n_flags);
820 u16 phy_info = le16_to_cpu(desc->phy_info);
821 struct ieee80211_sta *sta = NULL;
825 /* Dont use dev_alloc_skb(), we'll have enough headroom once
826 * ieee80211_hdr pulled.
828 skb = alloc_skb(128, GFP_ATOMIC);
830 IWL_ERR(mvm, "alloc_skb failed\n");
834 rx_status = IEEE80211_SKB_RXCB(skb);
836 if (iwl_mvm_rx_crypto(mvm, hdr, rx_status, desc,
837 le32_to_cpu(pkt->len_n_flags), queue,
844 * Keep packets with CRC errors (and with overrun) for monitor mode
845 * (otherwise the firmware discards them) but mark them as bad.
847 if (!(desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_CRC_OK)) ||
848 !(desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_OVERRUN_OK))) {
849 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n",
850 le16_to_cpu(desc->status));
851 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
853 /* set the preamble flag if appropriate */
854 if (phy_info & IWL_RX_MPDU_PHY_SHORT_PREAMBLE)
855 rx_status->enc_flags |= RX_ENC_FLAG_SHORTPRE;
857 if (likely(!(phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD))) {
858 rx_status->mactime = le64_to_cpu(desc->tsf_on_air_rise);
859 /* TSF as indicated by the firmware is at INA time */
860 rx_status->flag |= RX_FLAG_MACTIME_PLCP_START;
862 rx_status->device_timestamp = le32_to_cpu(desc->gp2_on_air_rise);
863 rx_status->band = desc->channel > 14 ? NL80211_BAND_5GHZ :
865 rx_status->freq = ieee80211_channel_to_frequency(desc->channel,
867 iwl_mvm_get_signal_strength(mvm, desc, rx_status);
869 /* update aggregation data for monitor sake on default queue */
870 if (!queue && (phy_info & IWL_RX_MPDU_PHY_AMPDU)) {
871 bool toggle_bit = phy_info & IWL_RX_MPDU_PHY_AMPDU_TOGGLE;
873 rx_status->flag |= RX_FLAG_AMPDU_DETAILS;
874 /* toggle is switched whenever new aggregation starts */
875 if (toggle_bit != mvm->ampdu_toggle) {
877 mvm->ampdu_toggle = toggle_bit;
879 rx_status->ampdu_reference = mvm->ampdu_ref;
884 if (desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_SRC_STA_FOUND)) {
885 u8 id = desc->sta_id_flags & IWL_RX_MPDU_SIF_STA_ID_MASK;
887 if (!WARN_ON_ONCE(id >= ARRAY_SIZE(mvm->fw_id_to_mac_id))) {
888 sta = rcu_dereference(mvm->fw_id_to_mac_id[id]);
892 } else if (!is_multicast_ether_addr(hdr->addr2)) {
894 * This is fine since we prevent two stations with the same
895 * address from being added.
897 sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL);
901 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
902 struct ieee80211_vif *tx_blocked_vif =
903 rcu_dereference(mvm->csa_tx_blocked_vif);
904 u8 baid = (u8)((le32_to_cpu(desc->reorder_data) &
905 IWL_RX_MPDU_REORDER_BAID_MASK) >>
906 IWL_RX_MPDU_REORDER_BAID_SHIFT);
909 * We have tx blocked stations (with CS bit). If we heard
910 * frames from a blocked station on a new channel we can
913 if (unlikely(tx_blocked_vif) &&
914 tx_blocked_vif == mvmsta->vif) {
915 struct iwl_mvm_vif *mvmvif =
916 iwl_mvm_vif_from_mac80211(tx_blocked_vif);
918 if (mvmvif->csa_target_freq == rx_status->freq)
919 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta,
923 rs_update_last_rssi(mvm, &mvmsta->lq_sta, rx_status);
925 if (iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_RSSI) &&
926 ieee80211_is_beacon(hdr->frame_control)) {
927 struct iwl_fw_dbg_trigger_tlv *trig;
928 struct iwl_fw_dbg_trigger_low_rssi *rssi_trig;
932 trig = iwl_fw_dbg_get_trigger(mvm->fw,
933 FW_DBG_TRIGGER_RSSI);
934 rssi_trig = (void *)trig->data;
935 rssi = le32_to_cpu(rssi_trig->rssi);
938 iwl_fw_dbg_trigger_check_stop(&mvm->fwrt,
939 ieee80211_vif_to_wdev(mvmsta->vif),
941 if (trig_check && rx_status->signal < rssi)
942 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
946 if (ieee80211_is_data(hdr->frame_control))
947 iwl_mvm_rx_csum(sta, skb, desc);
949 if (iwl_mvm_is_dup(sta, queue, rx_status, hdr, desc)) {
955 * Our hardware de-aggregates AMSDUs but copies the mac header
956 * as it to the de-aggregated MPDUs. We need to turn off the
957 * AMSDU bit in the QoS control ourselves.
958 * In addition, HW reverses addr3 and addr4 - reverse it back.
960 if ((desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU) &&
961 !WARN_ON(!ieee80211_is_data_qos(hdr->frame_control))) {
963 u8 *qc = ieee80211_get_qos_ctl(hdr);
964 u8 mac_addr[ETH_ALEN];
966 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
968 for (i = 0; i < ETH_ALEN; i++)
969 mac_addr[i] = hdr->addr3[ETH_ALEN - i - 1];
970 ether_addr_copy(hdr->addr3, mac_addr);
972 if (ieee80211_has_a4(hdr->frame_control)) {
973 for (i = 0; i < ETH_ALEN; i++)
975 hdr->addr4[ETH_ALEN - i - 1];
976 ether_addr_copy(hdr->addr4, mac_addr);
979 if (baid != IWL_RX_REORDER_DATA_INVALID_BAID) {
980 u32 reorder_data = le32_to_cpu(desc->reorder_data);
982 iwl_mvm_agg_rx_received(mvm, reorder_data, baid);
986 /* Set up the HT phy flags */
987 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
988 case RATE_MCS_CHAN_WIDTH_20:
990 case RATE_MCS_CHAN_WIDTH_40:
991 rx_status->bw = RATE_INFO_BW_40;
993 case RATE_MCS_CHAN_WIDTH_80:
994 rx_status->bw = RATE_INFO_BW_80;
996 case RATE_MCS_CHAN_WIDTH_160:
997 rx_status->bw = RATE_INFO_BW_160;
1001 if (!(rate_n_flags & RATE_MCS_CCK_MSK) &&
1002 rate_n_flags & RATE_MCS_SGI_MSK)
1003 rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
1004 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
1005 rx_status->enc_flags |= RX_ENC_FLAG_HT_GF;
1006 if (rate_n_flags & RATE_MCS_LDPC_MSK)
1007 rx_status->enc_flags |= RX_ENC_FLAG_LDPC;
1008 if (rate_n_flags & RATE_MCS_HT_MSK) {
1009 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >>
1011 rx_status->encoding = RX_ENC_HT;
1012 rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
1013 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
1014 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
1015 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >>
1018 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
1019 RATE_VHT_MCS_NSS_POS) + 1;
1020 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;
1021 rx_status->encoding = RX_ENC_VHT;
1022 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
1023 if (rate_n_flags & RATE_MCS_BF_MSK)
1024 rx_status->enc_flags |= RX_ENC_FLAG_BF;
1026 int rate = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
1029 if (WARN(rate < 0 || rate > 0xFF,
1030 "Invalid rate flags 0x%x, band %d,\n",
1031 rate_n_flags, rx_status->band)) {
1035 rx_status->rate_idx = rate;
1039 /* management stuff on default queue */
1041 if (unlikely((ieee80211_is_beacon(hdr->frame_control) ||
1042 ieee80211_is_probe_resp(hdr->frame_control)) &&
1043 mvm->sched_scan_pass_all ==
1044 SCHED_SCAN_PASS_ALL_ENABLED))
1045 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND;
1047 if (unlikely(ieee80211_is_beacon(hdr->frame_control) ||
1048 ieee80211_is_probe_resp(hdr->frame_control)))
1049 rx_status->boottime_ns = ktime_get_boot_ns();
1052 if (iwl_mvm_create_skb(mvm, skb, hdr, len, crypt_len, rxb)) {
1057 if (!iwl_mvm_reorder(mvm, napi, queue, sta, skb, desc))
1058 iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb, queue, sta);
1063 void iwl_mvm_rx_frame_release(struct iwl_mvm *mvm, struct napi_struct *napi,
1064 struct iwl_rx_cmd_buffer *rxb, int queue)
1066 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1067 struct iwl_frame_release *release = (void *)pkt->data;
1068 struct ieee80211_sta *sta;
1069 struct iwl_mvm_reorder_buffer *reorder_buf;
1070 struct iwl_mvm_baid_data *ba_data;
1072 int baid = release->baid;
1074 IWL_DEBUG_HT(mvm, "Frame release notification for BAID %u, NSSN %d\n",
1075 release->baid, le16_to_cpu(release->nssn));
1077 if (WARN_ON_ONCE(baid == IWL_RX_REORDER_DATA_INVALID_BAID))
1082 ba_data = rcu_dereference(mvm->baid_map[baid]);
1083 if (WARN_ON_ONCE(!ba_data))
1086 sta = rcu_dereference(mvm->fw_id_to_mac_id[ba_data->sta_id]);
1087 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
1090 reorder_buf = &ba_data->reorder_buf[queue];
1092 spin_lock_bh(&reorder_buf->lock);
1093 iwl_mvm_release_frames(mvm, sta, napi, reorder_buf,
1094 le16_to_cpu(release->nssn));
1095 spin_unlock_bh(&reorder_buf->lock);