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;
75 u8 pn[IEEE80211_CCMP_PN_LEN];
80 /* multicast and non-data only arrives on default queue */
81 if (!ieee80211_is_data(hdr->frame_control) ||
82 is_multicast_ether_addr(hdr->addr1))
85 /* do not check PN for open AP */
86 if (!(stats->flag & RX_FLAG_DECRYPTED))
90 * avoid checking for default queue - we don't want to replicate
91 * all the logic that's necessary for checking the PN on fragmented
92 * frames, leave that to mac80211
97 /* if we are here - this for sure is either CCMP or GCMP */
98 if (IS_ERR_OR_NULL(sta)) {
100 "expected hw-decrypted unicast frame for station\n");
104 mvmsta = iwl_mvm_sta_from_mac80211(sta);
106 extiv = (u8 *)hdr + ieee80211_hdrlen(hdr->frame_control);
107 keyidx = extiv[3] >> 6;
109 ptk_pn = rcu_dereference(mvmsta->ptk_pn[keyidx]);
113 if (ieee80211_is_data_qos(hdr->frame_control))
114 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
118 /* we don't use HCCA/802.11 QoS TSPECs, so drop such frames */
119 if (tid >= IWL_MAX_TID_COUNT)
130 if (memcmp(pn, ptk_pn->q[queue].pn[tid],
131 IEEE80211_CCMP_PN_LEN) <= 0)
134 if (!(stats->flag & RX_FLAG_AMSDU_MORE))
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 the device inserted padding it means that (it thought)
156 * the 802.11 header wasn't a multiple of 4 bytes long. In
157 * this case, reserve two bytes at the start of the SKB to
158 * align the payload properly in case we end up copying it.
160 skb_reserve(skb, pad_len);
164 /* If frame is small enough to fit in skb->head, pull it completely.
165 * If not, only pull ieee80211_hdr (including crypto if present, and
166 * an additional 8 bytes for SNAP/ethertype, see below) so that
167 * splice() or TCP coalesce are more efficient.
169 * Since, in addition, ieee80211_data_to_8023() always pull in at
170 * least 8 bytes (possibly more for mesh) we can do the same here
171 * to save the cost of doing it later. That still doesn't pull in
172 * the actual IP header since the typical case has a SNAP header.
173 * If the latter changes (there are efforts in the standards group
174 * to do so) we should revisit this and ieee80211_data_to_8023().
176 headlen = (len <= skb_tailroom(skb)) ? len :
177 hdrlen + crypt_len + 8;
179 /* The firmware may align the packet to DWORD.
180 * The padding is inserted after the IV.
181 * After copying the header + IV skip the padding if
182 * present before copying packet data.
185 skb_put_data(skb, hdr, hdrlen);
186 skb_put_data(skb, (u8 *)hdr + hdrlen + pad_len, headlen - hdrlen);
188 fraglen = len - headlen;
191 int offset = (void *)hdr + headlen + pad_len -
192 rxb_addr(rxb) + rxb_offset(rxb);
194 skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset,
195 fraglen, rxb->truesize);
199 /* iwl_mvm_pass_packet_to_mac80211 - passes the packet for mac80211 */
200 static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm,
201 struct napi_struct *napi,
202 struct sk_buff *skb, int queue,
203 struct ieee80211_sta *sta)
205 if (iwl_mvm_check_pn(mvm, skb, queue, sta))
208 ieee80211_rx_napi(mvm->hw, sta, skb, napi);
211 static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm,
212 struct iwl_rx_mpdu_desc *desc,
213 struct ieee80211_rx_status *rx_status)
215 int energy_a, energy_b, max_energy;
217 energy_a = desc->energy_a;
218 energy_a = energy_a ? -energy_a : S8_MIN;
219 energy_b = desc->energy_b;
220 energy_b = energy_b ? -energy_b : S8_MIN;
221 max_energy = max(energy_a, energy_b);
223 IWL_DEBUG_STATS(mvm, "energy In A %d B %d, and max %d\n",
224 energy_a, energy_b, max_energy);
226 rx_status->signal = max_energy;
227 rx_status->chains = 0; /* TODO: phy info */
228 rx_status->chain_signal[0] = energy_a;
229 rx_status->chain_signal[1] = energy_b;
230 rx_status->chain_signal[2] = S8_MIN;
233 static int iwl_mvm_rx_crypto(struct iwl_mvm *mvm, struct ieee80211_hdr *hdr,
234 struct ieee80211_rx_status *stats,
235 struct iwl_rx_mpdu_desc *desc, int queue,
238 u16 status = le16_to_cpu(desc->status);
240 if (!ieee80211_has_protected(hdr->frame_control) ||
241 (status & IWL_RX_MPDU_STATUS_SEC_MASK) ==
242 IWL_RX_MPDU_STATUS_SEC_NONE)
245 /* TODO: handle packets encrypted with unknown alg */
247 switch (status & IWL_RX_MPDU_STATUS_SEC_MASK) {
248 case IWL_RX_MPDU_STATUS_SEC_CCM:
249 case IWL_RX_MPDU_STATUS_SEC_GCM:
250 BUILD_BUG_ON(IEEE80211_CCMP_PN_LEN != IEEE80211_GCMP_PN_LEN);
251 /* alg is CCM: check MIC only */
252 if (!(status & IWL_RX_MPDU_STATUS_MIC_OK))
255 stats->flag |= RX_FLAG_DECRYPTED;
256 *crypt_len = IEEE80211_CCMP_HDR_LEN;
258 case IWL_RX_MPDU_STATUS_SEC_TKIP:
259 /* Don't drop the frame and decrypt it in SW */
260 if (!(status & IWL_RX_MPDU_RES_STATUS_TTAK_OK))
263 *crypt_len = IEEE80211_TKIP_IV_LEN;
264 /* fall through if TTAK OK */
265 case IWL_RX_MPDU_STATUS_SEC_WEP:
266 if (!(status & IWL_RX_MPDU_STATUS_ICV_OK))
269 stats->flag |= RX_FLAG_DECRYPTED;
270 if ((status & IWL_RX_MPDU_STATUS_SEC_MASK) ==
271 IWL_RX_MPDU_STATUS_SEC_WEP)
272 *crypt_len = IEEE80211_WEP_IV_LEN;
274 case IWL_RX_MPDU_STATUS_SEC_EXT_ENC:
275 if (!(status & IWL_RX_MPDU_STATUS_MIC_OK))
277 stats->flag |= RX_FLAG_DECRYPTED;
280 /* Expected in monitor (not having the keys) */
281 if (!mvm->monitor_on)
282 IWL_ERR(mvm, "Unhandled alg: 0x%x\n", status);
288 static void iwl_mvm_rx_csum(struct ieee80211_sta *sta,
290 struct iwl_rx_mpdu_desc *desc)
292 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
293 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
294 u16 flags = le16_to_cpu(desc->l3l4_flags);
295 u8 l3_prot = (u8)((flags & IWL_RX_L3L4_L3_PROTO_MASK) >>
296 IWL_RX_L3_PROTO_POS);
298 if (mvmvif->features & NETIF_F_RXCSUM &&
299 flags & IWL_RX_L3L4_TCP_UDP_CSUM_OK &&
300 (flags & IWL_RX_L3L4_IP_HDR_CSUM_OK ||
301 l3_prot == IWL_RX_L3_TYPE_IPV6 ||
302 l3_prot == IWL_RX_L3_TYPE_IPV6_FRAG))
303 skb->ip_summed = CHECKSUM_UNNECESSARY;
307 * returns true if a packet outside BA session is a duplicate and
310 static bool iwl_mvm_is_nonagg_dup(struct ieee80211_sta *sta, int queue,
311 struct ieee80211_rx_status *rx_status,
312 struct ieee80211_hdr *hdr,
313 struct iwl_rx_mpdu_desc *desc)
315 struct iwl_mvm_sta *mvm_sta;
316 struct iwl_mvm_rxq_dup_data *dup_data;
317 u8 baid, tid, sub_frame_idx;
319 if (WARN_ON(IS_ERR_OR_NULL(sta)))
322 baid = (le32_to_cpu(desc->reorder_data) &
323 IWL_RX_MPDU_REORDER_BAID_MASK) >>
324 IWL_RX_MPDU_REORDER_BAID_SHIFT;
326 if (baid != IWL_RX_REORDER_DATA_INVALID_BAID)
329 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
330 dup_data = &mvm_sta->dup_data[queue];
333 * Drop duplicate 802.11 retransmissions
334 * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery")
336 if (ieee80211_is_ctl(hdr->frame_control) ||
337 ieee80211_is_qos_nullfunc(hdr->frame_control) ||
338 is_multicast_ether_addr(hdr->addr1)) {
339 rx_status->flag |= RX_FLAG_DUP_VALIDATED;
343 if (ieee80211_is_data_qos(hdr->frame_control))
344 /* frame has qos control */
345 tid = *ieee80211_get_qos_ctl(hdr) &
346 IEEE80211_QOS_CTL_TID_MASK;
348 tid = IWL_MAX_TID_COUNT;
350 /* If this wasn't a part of an A-MSDU the sub-frame index will be 0 */
351 sub_frame_idx = desc->amsdu_info & IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK;
353 if (unlikely(ieee80211_has_retry(hdr->frame_control) &&
354 dup_data->last_seq[tid] == hdr->seq_ctrl &&
355 dup_data->last_sub_frame[tid] >= sub_frame_idx))
358 dup_data->last_seq[tid] = hdr->seq_ctrl;
359 dup_data->last_sub_frame[tid] = sub_frame_idx;
361 rx_status->flag |= RX_FLAG_DUP_VALIDATED;
366 int iwl_mvm_notify_rx_queue(struct iwl_mvm *mvm, u32 rxq_mask,
367 const u8 *data, u32 count)
369 struct iwl_rxq_sync_cmd *cmd;
370 u32 data_size = sizeof(*cmd) + count;
373 /* should be DWORD aligned */
374 if (WARN_ON(count & 3 || count > IWL_MULTI_QUEUE_SYNC_MSG_MAX_SIZE))
377 cmd = kzalloc(data_size, GFP_KERNEL);
381 cmd->rxq_mask = cpu_to_le32(rxq_mask);
382 cmd->count = cpu_to_le32(count);
384 memcpy(cmd->payload, data, count);
386 ret = iwl_mvm_send_cmd_pdu(mvm,
387 WIDE_ID(DATA_PATH_GROUP,
388 TRIGGER_RX_QUEUES_NOTIF_CMD),
396 * Returns true if sn2 - buffer_size < sn1 < sn2.
397 * To be used only in order to compare reorder buffer head with NSSN.
398 * We fully trust NSSN unless it is behind us due to reorder timeout.
399 * Reorder timeout can only bring us up to buffer_size SNs ahead of NSSN.
401 static bool iwl_mvm_is_sn_less(u16 sn1, u16 sn2, u16 buffer_size)
403 return ieee80211_sn_less(sn1, sn2) &&
404 !ieee80211_sn_less(sn1, sn2 - buffer_size);
407 #define RX_REORDER_BUF_TIMEOUT_MQ (HZ / 10)
409 static void iwl_mvm_release_frames(struct iwl_mvm *mvm,
410 struct ieee80211_sta *sta,
411 struct napi_struct *napi,
412 struct iwl_mvm_baid_data *baid_data,
413 struct iwl_mvm_reorder_buffer *reorder_buf,
416 struct iwl_mvm_reorder_buf_entry *entries =
417 &baid_data->entries[reorder_buf->queue *
418 baid_data->entries_per_queue];
419 u16 ssn = reorder_buf->head_sn;
421 lockdep_assert_held(&reorder_buf->lock);
423 /* ignore nssn smaller than head sn - this can happen due to timeout */
424 if (iwl_mvm_is_sn_less(nssn, ssn, reorder_buf->buf_size))
427 while (iwl_mvm_is_sn_less(ssn, nssn, reorder_buf->buf_size)) {
428 int index = ssn % reorder_buf->buf_size;
429 struct sk_buff_head *skb_list = &entries[index].e.frames;
432 ssn = ieee80211_sn_inc(ssn);
435 * Empty the list. Will have more than one frame for A-MSDU.
436 * Empty list is valid as well since nssn indicates frames were
439 while ((skb = __skb_dequeue(skb_list))) {
440 iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb,
443 reorder_buf->num_stored--;
446 reorder_buf->head_sn = nssn;
449 if (reorder_buf->num_stored && !reorder_buf->removed) {
450 u16 index = reorder_buf->head_sn % reorder_buf->buf_size;
452 while (skb_queue_empty(&entries[index].e.frames))
453 index = (index + 1) % reorder_buf->buf_size;
454 /* modify timer to match next frame's expiration time */
455 mod_timer(&reorder_buf->reorder_timer,
456 entries[index].e.reorder_time + 1 +
457 RX_REORDER_BUF_TIMEOUT_MQ);
459 del_timer(&reorder_buf->reorder_timer);
463 void iwl_mvm_reorder_timer_expired(struct timer_list *t)
465 struct iwl_mvm_reorder_buffer *buf = from_timer(buf, t, reorder_timer);
466 struct iwl_mvm_baid_data *baid_data =
467 iwl_mvm_baid_data_from_reorder_buf(buf);
468 struct iwl_mvm_reorder_buf_entry *entries =
469 &baid_data->entries[buf->queue * baid_data->entries_per_queue];
471 u16 sn = 0, index = 0;
472 bool expired = false;
475 spin_lock(&buf->lock);
477 if (!buf->num_stored || buf->removed) {
478 spin_unlock(&buf->lock);
482 for (i = 0; i < buf->buf_size ; i++) {
483 index = (buf->head_sn + i) % buf->buf_size;
485 if (skb_queue_empty(&entries[index].e.frames)) {
487 * If there is a hole and the next frame didn't expire
488 * we want to break and not advance SN
494 !time_after(jiffies, entries[index].e.reorder_time +
495 RX_REORDER_BUF_TIMEOUT_MQ))
499 /* continue until next hole after this expired frames */
501 sn = ieee80211_sn_add(buf->head_sn, i + 1);
505 struct ieee80211_sta *sta;
506 struct iwl_mvm_sta *mvmsta;
507 u8 sta_id = baid_data->sta_id;
510 sta = rcu_dereference(buf->mvm->fw_id_to_mac_id[sta_id]);
511 mvmsta = iwl_mvm_sta_from_mac80211(sta);
513 /* SN is set to the last expired frame + 1 */
514 IWL_DEBUG_HT(buf->mvm,
515 "Releasing expired frames for sta %u, sn %d\n",
517 iwl_mvm_event_frame_timeout_callback(buf->mvm, mvmsta->vif,
518 sta, baid_data->tid);
519 iwl_mvm_release_frames(buf->mvm, sta, NULL, baid_data, buf, sn);
523 * If no frame expired and there are stored frames, index is now
524 * pointing to the first unexpired frame - modify timer
525 * accordingly to this frame.
527 mod_timer(&buf->reorder_timer,
528 entries[index].e.reorder_time +
529 1 + RX_REORDER_BUF_TIMEOUT_MQ);
531 spin_unlock(&buf->lock);
534 static void iwl_mvm_del_ba(struct iwl_mvm *mvm, int queue,
535 struct iwl_mvm_delba_data *data)
537 struct iwl_mvm_baid_data *ba_data;
538 struct ieee80211_sta *sta;
539 struct iwl_mvm_reorder_buffer *reorder_buf;
540 u8 baid = data->baid;
542 if (WARN_ONCE(baid >= IWL_MAX_BAID, "invalid BAID: %x\n", baid))
547 ba_data = rcu_dereference(mvm->baid_map[baid]);
548 if (WARN_ON_ONCE(!ba_data))
551 sta = rcu_dereference(mvm->fw_id_to_mac_id[ba_data->sta_id]);
552 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
555 reorder_buf = &ba_data->reorder_buf[queue];
557 /* release all frames that are in the reorder buffer to the stack */
558 spin_lock_bh(&reorder_buf->lock);
559 iwl_mvm_release_frames(mvm, sta, NULL, ba_data, reorder_buf,
560 ieee80211_sn_add(reorder_buf->head_sn,
561 reorder_buf->buf_size));
562 spin_unlock_bh(&reorder_buf->lock);
563 del_timer_sync(&reorder_buf->reorder_timer);
569 void iwl_mvm_rx_queue_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
572 struct iwl_rx_packet *pkt = rxb_addr(rxb);
573 struct iwl_rxq_sync_notification *notif;
574 struct iwl_mvm_internal_rxq_notif *internal_notif;
576 notif = (void *)pkt->data;
577 internal_notif = (void *)notif->payload;
579 if (internal_notif->sync) {
580 if (mvm->queue_sync_cookie != internal_notif->cookie) {
582 "Received expired RX queue sync message\n");
585 if (!atomic_dec_return(&mvm->queue_sync_counter))
586 wake_up(&mvm->rx_sync_waitq);
589 switch (internal_notif->type) {
590 case IWL_MVM_RXQ_EMPTY:
592 case IWL_MVM_RXQ_NOTIF_DEL_BA:
593 iwl_mvm_del_ba(mvm, queue, (void *)internal_notif->data);
596 WARN_ONCE(1, "Invalid identifier %d", internal_notif->type);
601 * Returns true if the MPDU was buffered\dropped, false if it should be passed
604 static bool iwl_mvm_reorder(struct iwl_mvm *mvm,
605 struct napi_struct *napi,
607 struct ieee80211_sta *sta,
609 struct iwl_rx_mpdu_desc *desc)
611 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
612 struct iwl_mvm_sta *mvm_sta;
613 struct iwl_mvm_baid_data *baid_data;
614 struct iwl_mvm_reorder_buffer *buffer;
615 struct sk_buff *tail;
616 u32 reorder = le32_to_cpu(desc->reorder_data);
617 bool amsdu = desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU;
619 desc->amsdu_info & IWL_RX_MPDU_AMSDU_LAST_SUBFRAME;
620 u8 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
621 u8 sub_frame_idx = desc->amsdu_info &
622 IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK;
623 struct iwl_mvm_reorder_buf_entry *entries;
628 baid = (reorder & IWL_RX_MPDU_REORDER_BAID_MASK) >>
629 IWL_RX_MPDU_REORDER_BAID_SHIFT;
632 * This also covers the case of receiving a Block Ack Request
633 * outside a BA session; we'll pass it to mac80211 and that
634 * then sends a delBA action frame.
636 if (baid == IWL_RX_REORDER_DATA_INVALID_BAID)
640 if (WARN_ONCE(IS_ERR_OR_NULL(sta),
641 "Got valid BAID without a valid station assigned\n"))
644 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
646 /* not a data packet or a bar */
647 if (!ieee80211_is_back_req(hdr->frame_control) &&
648 (!ieee80211_is_data_qos(hdr->frame_control) ||
649 is_multicast_ether_addr(hdr->addr1)))
652 if (unlikely(!ieee80211_is_data_present(hdr->frame_control)))
655 baid_data = rcu_dereference(mvm->baid_map[baid]);
658 "Got valid BAID but no baid allocated, bypass the re-ordering buffer. Baid %d reorder 0x%x\n",
663 if (WARN(tid != baid_data->tid || mvm_sta->sta_id != baid_data->sta_id,
664 "baid 0x%x is mapped to sta:%d tid:%d, but was received for sta:%d tid:%d\n",
665 baid, baid_data->sta_id, baid_data->tid, mvm_sta->sta_id,
669 nssn = reorder & IWL_RX_MPDU_REORDER_NSSN_MASK;
670 sn = (reorder & IWL_RX_MPDU_REORDER_SN_MASK) >>
671 IWL_RX_MPDU_REORDER_SN_SHIFT;
673 buffer = &baid_data->reorder_buf[queue];
674 entries = &baid_data->entries[queue * baid_data->entries_per_queue];
676 spin_lock_bh(&buffer->lock);
678 if (!buffer->valid) {
679 if (reorder & IWL_RX_MPDU_REORDER_BA_OLD_SN) {
680 spin_unlock_bh(&buffer->lock);
683 buffer->valid = true;
686 if (ieee80211_is_back_req(hdr->frame_control)) {
687 iwl_mvm_release_frames(mvm, sta, napi, baid_data, buffer, nssn);
692 * If there was a significant jump in the nssn - adjust.
693 * If the SN is smaller than the NSSN it might need to first go into
694 * the reorder buffer, in which case we just release up to it and the
695 * rest of the function will take care of storing it and releasing up to
698 if (!iwl_mvm_is_sn_less(nssn, buffer->head_sn + buffer->buf_size,
700 !ieee80211_sn_less(sn, buffer->head_sn + buffer->buf_size)) {
701 u16 min_sn = ieee80211_sn_less(sn, nssn) ? sn : nssn;
703 iwl_mvm_release_frames(mvm, sta, napi, baid_data, buffer,
707 /* drop any oudated packets */
708 if (ieee80211_sn_less(sn, buffer->head_sn))
711 /* release immediately if allowed by nssn and no stored frames */
712 if (!buffer->num_stored && ieee80211_sn_less(sn, nssn)) {
713 if (iwl_mvm_is_sn_less(buffer->head_sn, nssn,
715 (!amsdu || last_subframe))
716 buffer->head_sn = nssn;
717 /* No need to update AMSDU last SN - we are moving the head */
718 spin_unlock_bh(&buffer->lock);
723 * release immediately if there are no stored frames, and the sn is
725 * This can happen due to reorder timer, where NSSN is behind head_sn.
726 * When we released everything, and we got the next frame in the
727 * sequence, according to the NSSN we can't release immediately,
728 * while technically there is no hole and we can move forward.
730 if (!buffer->num_stored && sn == buffer->head_sn) {
731 if (!amsdu || last_subframe)
732 buffer->head_sn = ieee80211_sn_inc(buffer->head_sn);
733 /* No need to update AMSDU last SN - we are moving the head */
734 spin_unlock_bh(&buffer->lock);
738 index = sn % buffer->buf_size;
741 * Check if we already stored this frame
742 * As AMSDU is either received or not as whole, logic is simple:
743 * If we have frames in that position in the buffer and the last frame
744 * originated from AMSDU had a different SN then it is a retransmission.
745 * If it is the same SN then if the subframe index is incrementing it
746 * is the same AMSDU - otherwise it is a retransmission.
748 tail = skb_peek_tail(&entries[index].e.frames);
751 else if (tail && (sn != buffer->last_amsdu ||
752 buffer->last_sub_index >= sub_frame_idx))
755 /* put in reorder buffer */
756 __skb_queue_tail(&entries[index].e.frames, skb);
757 buffer->num_stored++;
758 entries[index].e.reorder_time = jiffies;
761 buffer->last_amsdu = sn;
762 buffer->last_sub_index = sub_frame_idx;
766 * We cannot trust NSSN for AMSDU sub-frames that are not the last.
767 * The reason is that NSSN advances on the first sub-frame, and may
768 * cause the reorder buffer to advance before all the sub-frames arrive.
769 * Example: reorder buffer contains SN 0 & 2, and we receive AMSDU with
770 * SN 1. NSSN for first sub frame will be 3 with the result of driver
771 * releasing SN 0,1, 2. When sub-frame 1 arrives - reorder buffer is
772 * already ahead and it will be dropped.
773 * If the last sub-frame is not on this queue - we will get frame
774 * release notification with up to date NSSN.
776 if (!amsdu || last_subframe)
777 iwl_mvm_release_frames(mvm, sta, napi, baid_data, buffer, nssn);
779 spin_unlock_bh(&buffer->lock);
784 spin_unlock_bh(&buffer->lock);
788 static void iwl_mvm_agg_rx_received(struct iwl_mvm *mvm,
789 u32 reorder_data, u8 baid)
791 unsigned long now = jiffies;
792 unsigned long timeout;
793 struct iwl_mvm_baid_data *data;
797 data = rcu_dereference(mvm->baid_map[baid]);
800 "Got valid BAID but no baid allocated, bypass the re-ordering buffer. Baid %d reorder 0x%x\n",
808 timeout = data->timeout;
810 * Do not update last rx all the time to avoid cache bouncing
811 * between the rx queues.
812 * Update it every timeout. Worst case is the session will
813 * expire after ~ 2 * timeout, which doesn't matter that much.
815 if (time_before(data->last_rx + TU_TO_JIFFIES(timeout), now))
816 /* Update is atomic */
823 void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi,
824 struct iwl_rx_cmd_buffer *rxb, int queue)
826 struct ieee80211_rx_status *rx_status;
827 struct iwl_rx_packet *pkt = rxb_addr(rxb);
828 struct iwl_rx_mpdu_desc *desc = (void *)pkt->data;
829 struct ieee80211_hdr *hdr = (void *)(pkt->data + sizeof(*desc));
830 u32 len = le16_to_cpu(desc->mpdu_len);
831 u32 rate_n_flags = le32_to_cpu(desc->rate_n_flags);
832 u16 phy_info = le16_to_cpu(desc->phy_info);
833 struct ieee80211_sta *sta = NULL;
837 if (unlikely(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)))
840 /* Dont use dev_alloc_skb(), we'll have enough headroom once
841 * ieee80211_hdr pulled.
843 skb = alloc_skb(128, GFP_ATOMIC);
845 IWL_ERR(mvm, "alloc_skb failed\n");
849 rx_status = IEEE80211_SKB_RXCB(skb);
851 if (iwl_mvm_rx_crypto(mvm, hdr, rx_status, desc, queue, &crypt_len)) {
857 * Keep packets with CRC errors (and with overrun) for monitor mode
858 * (otherwise the firmware discards them) but mark them as bad.
860 if (!(desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_CRC_OK)) ||
861 !(desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_OVERRUN_OK))) {
862 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n",
863 le16_to_cpu(desc->status));
864 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
866 /* set the preamble flag if appropriate */
867 if (phy_info & IWL_RX_MPDU_PHY_SHORT_PREAMBLE)
868 rx_status->enc_flags |= RX_ENC_FLAG_SHORTPRE;
870 if (likely(!(phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD))) {
871 rx_status->mactime = le64_to_cpu(desc->tsf_on_air_rise);
872 /* TSF as indicated by the firmware is at INA time */
873 rx_status->flag |= RX_FLAG_MACTIME_PLCP_START;
875 rx_status->device_timestamp = le32_to_cpu(desc->gp2_on_air_rise);
876 rx_status->band = desc->channel > 14 ? NL80211_BAND_5GHZ :
878 rx_status->freq = ieee80211_channel_to_frequency(desc->channel,
880 iwl_mvm_get_signal_strength(mvm, desc, rx_status);
882 /* update aggregation data for monitor sake on default queue */
883 if (!queue && (phy_info & IWL_RX_MPDU_PHY_AMPDU)) {
884 bool toggle_bit = phy_info & IWL_RX_MPDU_PHY_AMPDU_TOGGLE;
886 rx_status->flag |= RX_FLAG_AMPDU_DETAILS;
887 rx_status->ampdu_reference = mvm->ampdu_ref;
888 /* toggle is switched whenever new aggregation starts */
889 if (toggle_bit != mvm->ampdu_toggle) {
891 mvm->ampdu_toggle = toggle_bit;
897 if (desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_SRC_STA_FOUND)) {
898 u8 id = desc->sta_id_flags & IWL_RX_MPDU_SIF_STA_ID_MASK;
900 if (!WARN_ON_ONCE(id >= ARRAY_SIZE(mvm->fw_id_to_mac_id))) {
901 sta = rcu_dereference(mvm->fw_id_to_mac_id[id]);
905 } else if (!is_multicast_ether_addr(hdr->addr2)) {
907 * This is fine since we prevent two stations with the same
908 * address from being added.
910 sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL);
914 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
915 struct ieee80211_vif *tx_blocked_vif =
916 rcu_dereference(mvm->csa_tx_blocked_vif);
917 u8 baid = (u8)((le32_to_cpu(desc->reorder_data) &
918 IWL_RX_MPDU_REORDER_BAID_MASK) >>
919 IWL_RX_MPDU_REORDER_BAID_SHIFT);
922 * We have tx blocked stations (with CS bit). If we heard
923 * frames from a blocked station on a new channel we can
926 if (unlikely(tx_blocked_vif) &&
927 tx_blocked_vif == mvmsta->vif) {
928 struct iwl_mvm_vif *mvmvif =
929 iwl_mvm_vif_from_mac80211(tx_blocked_vif);
931 if (mvmvif->csa_target_freq == rx_status->freq)
932 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta,
936 rs_update_last_rssi(mvm, &mvmsta->lq_sta, rx_status);
938 if (iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_RSSI) &&
939 ieee80211_is_beacon(hdr->frame_control)) {
940 struct iwl_fw_dbg_trigger_tlv *trig;
941 struct iwl_fw_dbg_trigger_low_rssi *rssi_trig;
945 trig = iwl_fw_dbg_get_trigger(mvm->fw,
946 FW_DBG_TRIGGER_RSSI);
947 rssi_trig = (void *)trig->data;
948 rssi = le32_to_cpu(rssi_trig->rssi);
951 iwl_fw_dbg_trigger_check_stop(&mvm->fwrt,
952 ieee80211_vif_to_wdev(mvmsta->vif),
954 if (trig_check && rx_status->signal < rssi)
955 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
959 if (ieee80211_is_data(hdr->frame_control))
960 iwl_mvm_rx_csum(sta, skb, desc);
962 if (iwl_mvm_is_nonagg_dup(sta, queue, rx_status, hdr, desc)) {
968 * Our hardware de-aggregates AMSDUs but copies the mac header
969 * as it to the de-aggregated MPDUs. We need to turn off the
970 * AMSDU bit in the QoS control ourselves.
971 * In addition, HW reverses addr3 and addr4 - reverse it back.
973 if ((desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU) &&
974 !WARN_ON(!ieee80211_is_data_qos(hdr->frame_control))) {
976 u8 *qc = ieee80211_get_qos_ctl(hdr);
977 u8 mac_addr[ETH_ALEN];
979 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
981 for (i = 0; i < ETH_ALEN; i++)
982 mac_addr[i] = hdr->addr3[ETH_ALEN - i - 1];
983 ether_addr_copy(hdr->addr3, mac_addr);
985 if (ieee80211_has_a4(hdr->frame_control)) {
986 for (i = 0; i < ETH_ALEN; i++)
988 hdr->addr4[ETH_ALEN - i - 1];
989 ether_addr_copy(hdr->addr4, mac_addr);
992 if (baid != IWL_RX_REORDER_DATA_INVALID_BAID) {
993 u32 reorder_data = le32_to_cpu(desc->reorder_data);
995 iwl_mvm_agg_rx_received(mvm, reorder_data, baid);
999 /* Set up the HT phy flags */
1000 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
1001 case RATE_MCS_CHAN_WIDTH_20:
1003 case RATE_MCS_CHAN_WIDTH_40:
1004 rx_status->bw = RATE_INFO_BW_40;
1006 case RATE_MCS_CHAN_WIDTH_80:
1007 rx_status->bw = RATE_INFO_BW_80;
1009 case RATE_MCS_CHAN_WIDTH_160:
1010 rx_status->bw = RATE_INFO_BW_160;
1013 if (rate_n_flags & RATE_MCS_SGI_MSK)
1014 rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
1015 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
1016 rx_status->enc_flags |= RX_ENC_FLAG_HT_GF;
1017 if (rate_n_flags & RATE_MCS_LDPC_MSK)
1018 rx_status->enc_flags |= RX_ENC_FLAG_LDPC;
1019 if (rate_n_flags & RATE_MCS_HT_MSK) {
1020 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >>
1022 rx_status->encoding = RX_ENC_HT;
1023 rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
1024 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
1025 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
1026 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >>
1029 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
1030 RATE_VHT_MCS_NSS_POS) + 1;
1031 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;
1032 rx_status->encoding = RX_ENC_VHT;
1033 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
1034 if (rate_n_flags & RATE_MCS_BF_MSK)
1035 rx_status->enc_flags |= RX_ENC_FLAG_BF;
1037 int rate = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
1040 if (WARN(rate < 0 || rate > 0xFF,
1041 "Invalid rate flags 0x%x, band %d,\n",
1042 rate_n_flags, rx_status->band)) {
1046 rx_status->rate_idx = rate;
1050 /* management stuff on default queue */
1052 if (unlikely((ieee80211_is_beacon(hdr->frame_control) ||
1053 ieee80211_is_probe_resp(hdr->frame_control)) &&
1054 mvm->sched_scan_pass_all ==
1055 SCHED_SCAN_PASS_ALL_ENABLED))
1056 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND;
1058 if (unlikely(ieee80211_is_beacon(hdr->frame_control) ||
1059 ieee80211_is_probe_resp(hdr->frame_control)))
1060 rx_status->boottime_ns = ktime_get_boot_ns();
1063 iwl_mvm_create_skb(skb, hdr, len, crypt_len, rxb);
1064 if (!iwl_mvm_reorder(mvm, napi, queue, sta, skb, desc))
1065 iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb, queue, sta);
1070 void iwl_mvm_rx_frame_release(struct iwl_mvm *mvm, struct napi_struct *napi,
1071 struct iwl_rx_cmd_buffer *rxb, int queue)
1073 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1074 struct iwl_frame_release *release = (void *)pkt->data;
1075 struct ieee80211_sta *sta;
1076 struct iwl_mvm_reorder_buffer *reorder_buf;
1077 struct iwl_mvm_baid_data *ba_data;
1079 int baid = release->baid;
1081 IWL_DEBUG_HT(mvm, "Frame release notification for BAID %u, NSSN %d\n",
1082 release->baid, le16_to_cpu(release->nssn));
1084 if (WARN_ON_ONCE(baid == IWL_RX_REORDER_DATA_INVALID_BAID))
1089 ba_data = rcu_dereference(mvm->baid_map[baid]);
1090 if (WARN_ON_ONCE(!ba_data))
1093 sta = rcu_dereference(mvm->fw_id_to_mac_id[ba_data->sta_id]);
1094 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
1097 reorder_buf = &ba_data->reorder_buf[queue];
1099 spin_lock_bh(&reorder_buf->lock);
1100 iwl_mvm_release_frames(mvm, sta, napi, ba_data, reorder_buf,
1101 le16_to_cpu(release->nssn));
1102 spin_unlock_bh(&reorder_buf->lock);