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1// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2/*
3 * Copyright (C) 2012-2014, 2018-2023 Intel Corporation
4 * Copyright (C) 2013-2015 Intel Mobile Communications GmbH
5 * Copyright (C) 2016-2017 Intel Deutschland GmbH
6 */
7#include <asm/unaligned.h>
8#include <linux/etherdevice.h>
9#include <linux/skbuff.h>
10#include "iwl-trans.h"
11#include "mvm.h"
12#include "fw-api.h"
13
14/*
15 * iwl_mvm_rx_rx_phy_cmd - REPLY_RX_PHY_CMD handler
16 *
17 * Copies the phy information in mvm->last_phy_info, it will be used when the
18 * actual data will come from the fw in the next packet.
19 */
20void iwl_mvm_rx_rx_phy_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
21{
22 struct iwl_rx_packet *pkt = rxb_addr(rxb);
23 unsigned int pkt_len = iwl_rx_packet_payload_len(pkt);
24
25 if (unlikely(pkt_len < sizeof(mvm->last_phy_info)))
26 return;
27
28 memcpy(&mvm->last_phy_info, pkt->data, sizeof(mvm->last_phy_info));
29 mvm->ampdu_ref++;
30
31#ifdef CONFIG_IWLWIFI_DEBUGFS
32 if (mvm->last_phy_info.phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) {
33 spin_lock(&mvm->drv_stats_lock);
34 mvm->drv_rx_stats.ampdu_count++;
35 spin_unlock(&mvm->drv_stats_lock);
36 }
37#endif
38}
39
40/*
41 * iwl_mvm_pass_packet_to_mac80211 - builds the packet for mac80211
42 *
43 * Adds the rxb to a new skb and give it to mac80211
44 */
45static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm,
46 struct ieee80211_sta *sta,
47 struct napi_struct *napi,
48 struct sk_buff *skb,
49 struct ieee80211_hdr *hdr, u16 len,
50 u8 crypt_len,
51 struct iwl_rx_cmd_buffer *rxb)
52{
53 unsigned int hdrlen = ieee80211_hdrlen(hdr->frame_control);
54 unsigned int fraglen;
55
56 /*
57 * The 'hdrlen' (plus the 8 bytes for the SNAP and the crypt_len,
58 * but those are all multiples of 4 long) all goes away, but we
59 * want the *end* of it, which is going to be the start of the IP
60 * header, to be aligned when it gets pulled in.
61 * The beginning of the skb->data is aligned on at least a 4-byte
62 * boundary after allocation. Everything here is aligned at least
63 * on a 2-byte boundary so we can just take hdrlen & 3 and pad by
64 * the result.
65 */
66 skb_reserve(skb, hdrlen & 3);
67
68 /* If frame is small enough to fit in skb->head, pull it completely.
69 * If not, only pull ieee80211_hdr (including crypto if present, and
70 * an additional 8 bytes for SNAP/ethertype, see below) so that
71 * splice() or TCP coalesce are more efficient.
72 *
73 * Since, in addition, ieee80211_data_to_8023() always pull in at
74 * least 8 bytes (possibly more for mesh) we can do the same here
75 * to save the cost of doing it later. That still doesn't pull in
76 * the actual IP header since the typical case has a SNAP header.
77 * If the latter changes (there are efforts in the standards group
78 * to do so) we should revisit this and ieee80211_data_to_8023().
79 */
80 hdrlen = (len <= skb_tailroom(skb)) ? len : hdrlen + crypt_len + 8;
81
82 skb_put_data(skb, hdr, hdrlen);
83 fraglen = len - hdrlen;
84
85 if (fraglen) {
86 int offset = (u8 *)hdr + hdrlen -
87 (u8 *)rxb_addr(rxb) + rxb_offset(rxb);
88
89 skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset,
90 fraglen, rxb->truesize);
91 }
92
93 ieee80211_rx_napi(mvm->hw, sta, skb, napi);
94}
95
96/*
97 * iwl_mvm_get_signal_strength - use new rx PHY INFO API
98 * values are reported by the fw as positive values - need to negate
99 * to obtain their dBM. Account for missing antennas by replacing 0
100 * values by -256dBm: practically 0 power and a non-feasible 8 bit value.
101 */
102static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm,
103 struct iwl_rx_phy_info *phy_info,
104 struct ieee80211_rx_status *rx_status)
105{
106 int energy_a, energy_b, max_energy;
107 u32 val;
108
109 val =
110 le32_to_cpu(phy_info->non_cfg_phy[IWL_RX_INFO_ENERGY_ANT_ABC_IDX]);
111 energy_a = (val & IWL_RX_INFO_ENERGY_ANT_A_MSK) >>
112 IWL_RX_INFO_ENERGY_ANT_A_POS;
113 energy_a = energy_a ? -energy_a : S8_MIN;
114 energy_b = (val & IWL_RX_INFO_ENERGY_ANT_B_MSK) >>
115 IWL_RX_INFO_ENERGY_ANT_B_POS;
116 energy_b = energy_b ? -energy_b : S8_MIN;
117 max_energy = max(energy_a, energy_b);
118
119 IWL_DEBUG_STATS(mvm, "energy In A %d B %d , and max %d\n",
120 energy_a, energy_b, max_energy);
121
122 rx_status->signal = max_energy;
123 rx_status->chains = (le16_to_cpu(phy_info->phy_flags) &
124 RX_RES_PHY_FLAGS_ANTENNA)
125 >> RX_RES_PHY_FLAGS_ANTENNA_POS;
126 rx_status->chain_signal[0] = energy_a;
127 rx_status->chain_signal[1] = energy_b;
128}
129
130/*
131 * iwl_mvm_set_mac80211_rx_flag - translate fw status to mac80211 format
132 * @mvm: the mvm object
133 * @hdr: 80211 header
134 * @stats: status in mac80211's format
135 * @rx_pkt_status: status coming from fw
136 *
137 * returns non 0 value if the packet should be dropped
138 */
139static u32 iwl_mvm_set_mac80211_rx_flag(struct iwl_mvm *mvm,
140 struct ieee80211_hdr *hdr,
141 struct ieee80211_rx_status *stats,
142 u32 rx_pkt_status,
143 u8 *crypt_len)
144{
145 if (!ieee80211_has_protected(hdr->frame_control) ||
146 (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
147 RX_MPDU_RES_STATUS_SEC_NO_ENC)
148 return 0;
149
150 /* packet was encrypted with unknown alg */
151 if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
152 RX_MPDU_RES_STATUS_SEC_ENC_ERR)
153 return 0;
154
155 switch (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) {
156 case RX_MPDU_RES_STATUS_SEC_CCM_ENC:
157 /* alg is CCM: check MIC only */
158 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK))
159 return -1;
160
161 stats->flag |= RX_FLAG_DECRYPTED;
162 *crypt_len = IEEE80211_CCMP_HDR_LEN;
163 return 0;
164
165 case RX_MPDU_RES_STATUS_SEC_TKIP_ENC:
166 /* Don't drop the frame and decrypt it in SW */
167 if (!fw_has_api(&mvm->fw->ucode_capa,
168 IWL_UCODE_TLV_API_DEPRECATE_TTAK) &&
169 !(rx_pkt_status & RX_MPDU_RES_STATUS_TTAK_OK))
170 return 0;
171 *crypt_len = IEEE80211_TKIP_IV_LEN;
172 fallthrough;
173
174 case RX_MPDU_RES_STATUS_SEC_WEP_ENC:
175 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_ICV_OK))
176 return -1;
177
178 stats->flag |= RX_FLAG_DECRYPTED;
179 if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
180 RX_MPDU_RES_STATUS_SEC_WEP_ENC)
181 *crypt_len = IEEE80211_WEP_IV_LEN;
182 return 0;
183
184 case RX_MPDU_RES_STATUS_SEC_EXT_ENC:
185 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK))
186 return -1;
187 stats->flag |= RX_FLAG_DECRYPTED;
188 return 0;
189
190 default:
191 /* Expected in monitor (not having the keys) */
192 if (!mvm->monitor_on)
193 IWL_WARN(mvm, "Unhandled alg: 0x%x\n", rx_pkt_status);
194 }
195
196 return 0;
197}
198
199static void iwl_mvm_rx_handle_tcm(struct iwl_mvm *mvm,
200 struct ieee80211_sta *sta,
201 struct ieee80211_hdr *hdr, u32 len,
202 struct iwl_rx_phy_info *phy_info,
203 u32 rate_n_flags)
204{
205 struct iwl_mvm_sta *mvmsta;
206 struct iwl_mvm_tcm_mac *mdata;
207 int mac;
208 int ac = IEEE80211_AC_BE; /* treat non-QoS as BE */
209 struct iwl_mvm_vif *mvmvif;
210 /* expected throughput in 100Kbps, single stream, 20 MHz */
211 static const u8 thresh_tpt[] = {
212 9, 18, 30, 42, 60, 78, 90, 96, 120, 135,
213 };
214 u16 thr;
215
216 if (ieee80211_is_data_qos(hdr->frame_control)) {
217 u8 tid = ieee80211_get_tid(hdr);
218
219 if (tid < IWL_MAX_TID_COUNT)
220 ac = tid_to_mac80211_ac[tid];
221 }
222
223 mvmsta = iwl_mvm_sta_from_mac80211(sta);
224 mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
225
226 if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD))
227 schedule_delayed_work(&mvm->tcm.work, 0);
228 mdata = &mvm->tcm.data[mac];
229 mdata->rx.pkts[ac]++;
230
231 /* count the airtime only once for each ampdu */
232 if (mdata->rx.last_ampdu_ref != mvm->ampdu_ref) {
233 mdata->rx.last_ampdu_ref = mvm->ampdu_ref;
234 mdata->rx.airtime += le16_to_cpu(phy_info->frame_time);
235 }
236
237 if (!(rate_n_flags & (RATE_MCS_HT_MSK_V1 | RATE_MCS_VHT_MSK_V1)))
238 return;
239
240 mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
241
242 if (mdata->opened_rx_ba_sessions ||
243 mdata->uapsd_nonagg_detect.detected ||
244 (!mvmvif->deflink.queue_params[IEEE80211_AC_VO].uapsd &&
245 !mvmvif->deflink.queue_params[IEEE80211_AC_VI].uapsd &&
246 !mvmvif->deflink.queue_params[IEEE80211_AC_BE].uapsd &&
247 !mvmvif->deflink.queue_params[IEEE80211_AC_BK].uapsd) ||
248 mvmsta->deflink.sta_id != mvmvif->deflink.ap_sta_id)
249 return;
250
251 if (rate_n_flags & RATE_MCS_HT_MSK_V1) {
252 thr = thresh_tpt[rate_n_flags & RATE_HT_MCS_RATE_CODE_MSK_V1];
253 thr *= 1 + ((rate_n_flags & RATE_HT_MCS_NSS_MSK_V1) >>
254 RATE_HT_MCS_NSS_POS_V1);
255 } else {
256 if (WARN_ON((rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK) >=
257 ARRAY_SIZE(thresh_tpt)))
258 return;
259 thr = thresh_tpt[rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK];
260 thr *= 1 + FIELD_GET(RATE_MCS_NSS_MSK, rate_n_flags);
261 }
262
263 thr <<= ((rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK_V1) >>
264 RATE_MCS_CHAN_WIDTH_POS);
265
266 mdata->uapsd_nonagg_detect.rx_bytes += len;
267 ewma_rate_add(&mdata->uapsd_nonagg_detect.rate, thr);
268}
269
270static void iwl_mvm_rx_csum(struct ieee80211_sta *sta,
271 struct sk_buff *skb,
272 u32 status)
273{
274 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
275 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
276
277 if (mvmvif->features & NETIF_F_RXCSUM &&
278 status & RX_MPDU_RES_STATUS_CSUM_DONE &&
279 status & RX_MPDU_RES_STATUS_CSUM_OK)
280 skb->ip_summed = CHECKSUM_UNNECESSARY;
281}
282
283/*
284 * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler
285 *
286 * Handles the actual data of the Rx packet from the fw
287 */
288void iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct napi_struct *napi,
289 struct iwl_rx_cmd_buffer *rxb)
290{
291 struct ieee80211_hdr *hdr;
292 struct ieee80211_rx_status *rx_status;
293 struct iwl_rx_packet *pkt = rxb_addr(rxb);
294 struct iwl_rx_phy_info *phy_info;
295 struct iwl_rx_mpdu_res_start *rx_res;
296 struct ieee80211_sta *sta = NULL;
297 struct sk_buff *skb;
298 u32 len, pkt_len = iwl_rx_packet_payload_len(pkt);
299 u32 rate_n_flags;
300 u32 rx_pkt_status;
301 u8 crypt_len = 0;
302
303 if (unlikely(pkt_len < sizeof(*rx_res))) {
304 IWL_DEBUG_DROP(mvm, "Bad REPLY_RX_MPDU_CMD size\n");
305 return;
306 }
307
308 phy_info = &mvm->last_phy_info;
309 rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data;
310 hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res));
311 len = le16_to_cpu(rx_res->byte_count);
312
313 if (unlikely(len + sizeof(*rx_res) + sizeof(__le32) > pkt_len)) {
314 IWL_DEBUG_DROP(mvm, "FW lied about packet len\n");
315 return;
316 }
317
318 rx_pkt_status = get_unaligned_le32((__le32 *)
319 (pkt->data + sizeof(*rx_res) + len));
320
321 /* Dont use dev_alloc_skb(), we'll have enough headroom once
322 * ieee80211_hdr pulled.
323 */
324 skb = alloc_skb(128, GFP_ATOMIC);
325 if (!skb) {
326 IWL_ERR(mvm, "alloc_skb failed\n");
327 return;
328 }
329
330 rx_status = IEEE80211_SKB_RXCB(skb);
331
332 /*
333 * Keep packets with CRC errors (and with overrun) for monitor mode
334 * (otherwise the firmware discards them) but mark them as bad.
335 */
336 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) ||
337 !(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) {
338 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status);
339 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
340 }
341
342 /* This will be used in several places later */
343 rate_n_flags = le32_to_cpu(phy_info->rate_n_flags);
344
345 /* rx_status carries information about the packet to mac80211 */
346 rx_status->mactime = le64_to_cpu(phy_info->timestamp);
347 rx_status->device_timestamp = le32_to_cpu(phy_info->system_timestamp);
348 rx_status->band =
349 (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ?
350 NL80211_BAND_2GHZ : NL80211_BAND_5GHZ;
351 rx_status->freq =
352 ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel),
353 rx_status->band);
354
355 /* TSF as indicated by the firmware is at INA time */
356 rx_status->flag |= RX_FLAG_MACTIME_PLCP_START;
357
358 iwl_mvm_get_signal_strength(mvm, phy_info, rx_status);
359
360 IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status->signal,
361 (unsigned long long)rx_status->mactime);
362
363 rcu_read_lock();
364 if (rx_pkt_status & RX_MPDU_RES_STATUS_SRC_STA_FOUND) {
365 u32 id = rx_pkt_status & RX_MPDU_RES_STATUS_STA_ID_MSK;
366
367 id >>= RX_MDPU_RES_STATUS_STA_ID_SHIFT;
368
369 if (!WARN_ON_ONCE(id >= mvm->fw->ucode_capa.num_stations)) {
370 sta = rcu_dereference(mvm->fw_id_to_mac_id[id]);
371 if (IS_ERR(sta))
372 sta = NULL;
373 }
374 } else if (!is_multicast_ether_addr(hdr->addr2)) {
375 /* This is fine since we prevent two stations with the same
376 * address from being added.
377 */
378 sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL);
379 }
380
381 if (sta) {
382 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
383 struct ieee80211_vif *vif = mvmsta->vif;
384 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
385
386 /*
387 * Don't even try to decrypt a MCAST frame that was received
388 * before the managed vif is authorized, we'd fail anyway.
389 */
390 if (is_multicast_ether_addr(hdr->addr1) &&
391 vif->type == NL80211_IFTYPE_STATION &&
392 !mvmvif->authorized &&
393 ieee80211_has_protected(hdr->frame_control)) {
394 IWL_DEBUG_DROP(mvm, "MCAST before the vif is authorized\n");
395 kfree_skb(skb);
396 rcu_read_unlock();
397 return;
398 }
399 }
400
401 /*
402 * drop the packet if it has failed being decrypted by HW
403 */
404 if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, rx_status, rx_pkt_status,
405 &crypt_len)) {
406 IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n",
407 rx_pkt_status);
408 kfree_skb(skb);
409 rcu_read_unlock();
410 return;
411 }
412
413 if (sta) {
414 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
415 struct ieee80211_vif *tx_blocked_vif =
416 rcu_dereference(mvm->csa_tx_blocked_vif);
417 struct iwl_fw_dbg_trigger_tlv *trig;
418 struct ieee80211_vif *vif = mvmsta->vif;
419
420 /* We have tx blocked stations (with CS bit). If we heard
421 * frames from a blocked station on a new channel we can
422 * TX to it again.
423 */
424 if (unlikely(tx_blocked_vif) && vif == tx_blocked_vif) {
425 struct iwl_mvm_vif *mvmvif =
426 iwl_mvm_vif_from_mac80211(tx_blocked_vif);
427
428 if (mvmvif->csa_target_freq == rx_status->freq)
429 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta,
430 false);
431 }
432
433 rs_update_last_rssi(mvm, mvmsta, rx_status);
434
435 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt,
436 ieee80211_vif_to_wdev(vif),
437 FW_DBG_TRIGGER_RSSI);
438
439 if (trig && ieee80211_is_beacon(hdr->frame_control)) {
440 struct iwl_fw_dbg_trigger_low_rssi *rssi_trig;
441 s32 rssi;
442
443 rssi_trig = (void *)trig->data;
444 rssi = le32_to_cpu(rssi_trig->rssi);
445
446 if (rx_status->signal < rssi)
447 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
448 NULL);
449 }
450
451 if (!mvm->tcm.paused && len >= sizeof(*hdr) &&
452 !is_multicast_ether_addr(hdr->addr1) &&
453 ieee80211_is_data(hdr->frame_control))
454 iwl_mvm_rx_handle_tcm(mvm, sta, hdr, len, phy_info,
455 rate_n_flags);
456
457 if (ieee80211_is_data(hdr->frame_control))
458 iwl_mvm_rx_csum(sta, skb, rx_pkt_status);
459 }
460 rcu_read_unlock();
461
462 /* set the preamble flag if appropriate */
463 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE))
464 rx_status->enc_flags |= RX_ENC_FLAG_SHORTPRE;
465
466 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) {
467 /*
468 * We know which subframes of an A-MPDU belong
469 * together since we get a single PHY response
470 * from the firmware for all of them
471 */
472 rx_status->flag |= RX_FLAG_AMPDU_DETAILS;
473 rx_status->ampdu_reference = mvm->ampdu_ref;
474 }
475
476 /* Set up the HT phy flags */
477 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK_V1) {
478 case RATE_MCS_CHAN_WIDTH_20:
479 break;
480 case RATE_MCS_CHAN_WIDTH_40:
481 rx_status->bw = RATE_INFO_BW_40;
482 break;
483 case RATE_MCS_CHAN_WIDTH_80:
484 rx_status->bw = RATE_INFO_BW_80;
485 break;
486 case RATE_MCS_CHAN_WIDTH_160:
487 rx_status->bw = RATE_INFO_BW_160;
488 break;
489 }
490 if (!(rate_n_flags & RATE_MCS_CCK_MSK_V1) &&
491 rate_n_flags & RATE_MCS_SGI_MSK_V1)
492 rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
493 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
494 rx_status->enc_flags |= RX_ENC_FLAG_HT_GF;
495 if (rate_n_flags & RATE_MCS_LDPC_MSK_V1)
496 rx_status->enc_flags |= RX_ENC_FLAG_LDPC;
497 if (rate_n_flags & RATE_MCS_HT_MSK_V1) {
498 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >>
499 RATE_MCS_STBC_POS;
500 rx_status->encoding = RX_ENC_HT;
501 rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK_V1;
502 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
503 } else if (rate_n_flags & RATE_MCS_VHT_MSK_V1) {
504 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >>
505 RATE_MCS_STBC_POS;
506 rx_status->nss =
507 FIELD_GET(RATE_MCS_NSS_MSK, rate_n_flags) + 1;
508 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;
509 rx_status->encoding = RX_ENC_VHT;
510 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
511 if (rate_n_flags & RATE_MCS_BF_MSK)
512 rx_status->enc_flags |= RX_ENC_FLAG_BF;
513 } else {
514 int rate = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
515 rx_status->band);
516
517 if (WARN(rate < 0 || rate > 0xFF,
518 "Invalid rate flags 0x%x, band %d,\n",
519 rate_n_flags, rx_status->band)) {
520 kfree_skb(skb);
521 return;
522 }
523 rx_status->rate_idx = rate;
524 }
525
526#ifdef CONFIG_IWLWIFI_DEBUGFS
527 iwl_mvm_update_frame_stats(mvm, rate_n_flags,
528 rx_status->flag & RX_FLAG_AMPDU_DETAILS);
529#endif
530
531 if (unlikely((ieee80211_is_beacon(hdr->frame_control) ||
532 ieee80211_is_probe_resp(hdr->frame_control)) &&
533 mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED))
534 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND;
535
536 if (unlikely(ieee80211_is_beacon(hdr->frame_control) ||
537 ieee80211_is_probe_resp(hdr->frame_control)))
538 rx_status->boottime_ns = ktime_get_boottime_ns();
539
540 iwl_mvm_pass_packet_to_mac80211(mvm, sta, napi, skb, hdr, len,
541 crypt_len, rxb);
542}
543
544struct iwl_mvm_stat_data {
545 struct iwl_mvm *mvm;
546 __le32 flags;
547 __le32 mac_id;
548 u8 beacon_filter_average_energy;
549 __le32 *beacon_counter;
550 u8 *beacon_average_energy;
551};
552
553struct iwl_mvm_stat_data_all_macs {
554 struct iwl_mvm *mvm;
555 __le32 flags;
556 struct iwl_stats_ntfy_per_mac *per_mac;
557};
558
559static void iwl_mvm_update_vif_sig(struct ieee80211_vif *vif, int sig)
560{
561 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
562 struct iwl_mvm *mvm = mvmvif->mvm;
563 int thold = vif->bss_conf.cqm_rssi_thold;
564 int hyst = vif->bss_conf.cqm_rssi_hyst;
565 int last_event;
566
567 if (sig == 0) {
568 IWL_DEBUG_RX(mvm, "RSSI is 0 - skip signal based decision\n");
569 return;
570 }
571
572 mvmvif->bf_data.ave_beacon_signal = sig;
573
574 /* BT Coex */
575 if (mvmvif->bf_data.bt_coex_min_thold !=
576 mvmvif->bf_data.bt_coex_max_thold) {
577 last_event = mvmvif->bf_data.last_bt_coex_event;
578 if (sig > mvmvif->bf_data.bt_coex_max_thold &&
579 (last_event <= mvmvif->bf_data.bt_coex_min_thold ||
580 last_event == 0)) {
581 mvmvif->bf_data.last_bt_coex_event = sig;
582 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex high %d\n",
583 sig);
584 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_HIGH);
585 } else if (sig < mvmvif->bf_data.bt_coex_min_thold &&
586 (last_event >= mvmvif->bf_data.bt_coex_max_thold ||
587 last_event == 0)) {
588 mvmvif->bf_data.last_bt_coex_event = sig;
589 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex low %d\n",
590 sig);
591 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_LOW);
592 }
593 }
594
595 if (!(vif->driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI))
596 return;
597
598 /* CQM Notification */
599 last_event = mvmvif->bf_data.last_cqm_event;
600 if (thold && sig < thold && (last_event == 0 ||
601 sig < last_event - hyst)) {
602 mvmvif->bf_data.last_cqm_event = sig;
603 IWL_DEBUG_RX(mvm, "cqm_iterator cqm low %d\n",
604 sig);
605 ieee80211_cqm_rssi_notify(
606 vif,
607 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
608 sig,
609 GFP_KERNEL);
610 } else if (sig > thold &&
611 (last_event == 0 || sig > last_event + hyst)) {
612 mvmvif->bf_data.last_cqm_event = sig;
613 IWL_DEBUG_RX(mvm, "cqm_iterator cqm high %d\n",
614 sig);
615 ieee80211_cqm_rssi_notify(
616 vif,
617 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
618 sig,
619 GFP_KERNEL);
620 }
621}
622
623static void iwl_mvm_stat_iterator(void *_data, u8 *mac,
624 struct ieee80211_vif *vif)
625{
626 struct iwl_mvm_stat_data *data = _data;
627 int sig = -data->beacon_filter_average_energy;
628 u16 id = le32_to_cpu(data->mac_id);
629 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
630 u16 vif_id = mvmvif->id;
631
632 /* This doesn't need the MAC ID check since it's not taking the
633 * data copied into the "data" struct, but rather the data from
634 * the notification directly.
635 */
636 mvmvif->deflink.beacon_stats.num_beacons =
637 le32_to_cpu(data->beacon_counter[vif_id]);
638 mvmvif->deflink.beacon_stats.avg_signal =
639 -data->beacon_average_energy[vif_id];
640
641 if (mvmvif->id != id)
642 return;
643
644 if (vif->type != NL80211_IFTYPE_STATION)
645 return;
646
647 /* make sure that beacon statistics don't go backwards with TCM
648 * request to clear statistics
649 */
650 if (le32_to_cpu(data->flags) & IWL_STATISTICS_REPLY_FLG_CLEAR)
651 mvmvif->deflink.beacon_stats.accu_num_beacons +=
652 mvmvif->deflink.beacon_stats.num_beacons;
653
654 iwl_mvm_update_vif_sig(vif, sig);
655}
656
657static void iwl_mvm_stat_iterator_all_macs(void *_data, u8 *mac,
658 struct ieee80211_vif *vif)
659{
660 struct iwl_mvm_stat_data_all_macs *data = _data;
661 struct iwl_stats_ntfy_per_mac *mac_stats;
662 int sig;
663 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
664 u16 vif_id = mvmvif->id;
665
666 if (WARN_ONCE(vif_id >= MAC_INDEX_AUX, "invalid vif id: %d", vif_id))
667 return;
668
669 if (vif->type != NL80211_IFTYPE_STATION)
670 return;
671
672 mac_stats = &data->per_mac[vif_id];
673
674 mvmvif->deflink.beacon_stats.num_beacons =
675 le32_to_cpu(mac_stats->beacon_counter);
676 mvmvif->deflink.beacon_stats.avg_signal =
677 -le32_to_cpu(mac_stats->beacon_average_energy);
678
679 /* make sure that beacon statistics don't go backwards with TCM
680 * request to clear statistics
681 */
682 if (le32_to_cpu(data->flags) & IWL_STATISTICS_REPLY_FLG_CLEAR)
683 mvmvif->deflink.beacon_stats.accu_num_beacons +=
684 mvmvif->deflink.beacon_stats.num_beacons;
685
686 sig = -le32_to_cpu(mac_stats->beacon_filter_average_energy);
687 iwl_mvm_update_vif_sig(vif, sig);
688}
689
690static inline void
691iwl_mvm_rx_stats_check_trigger(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt)
692{
693 struct iwl_fw_dbg_trigger_tlv *trig;
694 struct iwl_fw_dbg_trigger_stats *trig_stats;
695 u32 trig_offset, trig_thold;
696
697 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_STATS);
698 if (!trig)
699 return;
700
701 trig_stats = (void *)trig->data;
702
703 trig_offset = le32_to_cpu(trig_stats->stop_offset);
704 trig_thold = le32_to_cpu(trig_stats->stop_threshold);
705
706 if (WARN_ON_ONCE(trig_offset >= iwl_rx_packet_payload_len(pkt)))
707 return;
708
709 if (le32_to_cpup((__le32 *) (pkt->data + trig_offset)) < trig_thold)
710 return;
711
712 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, NULL);
713}
714
715static void iwl_mvm_stats_energy_iter(void *_data,
716 struct ieee80211_sta *sta)
717{
718 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
719 u8 *energy = _data;
720 u32 sta_id = mvmsta->deflink.sta_id;
721
722 if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT_MAX, "sta_id %d >= %d",
723 sta_id, IWL_MVM_STATION_COUNT_MAX))
724 return;
725
726 if (energy[sta_id])
727 mvmsta->deflink.avg_energy = energy[sta_id];
728
729}
730
731static void
732iwl_mvm_update_tcm_from_stats(struct iwl_mvm *mvm, __le32 *air_time_le,
733 __le32 *rx_bytes_le)
734{
735 int i;
736
737 spin_lock(&mvm->tcm.lock);
738 for (i = 0; i < NUM_MAC_INDEX_DRIVER; i++) {
739 struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[i];
740 u32 rx_bytes = le32_to_cpu(rx_bytes_le[i]);
741 u32 airtime = le32_to_cpu(air_time_le[i]);
742
743 mdata->rx.airtime += airtime;
744 mdata->uapsd_nonagg_detect.rx_bytes += rx_bytes;
745 if (airtime) {
746 /* re-init every time to store rate from FW */
747 ewma_rate_init(&mdata->uapsd_nonagg_detect.rate);
748 ewma_rate_add(&mdata->uapsd_nonagg_detect.rate,
749 rx_bytes * 8 / airtime);
750 }
751 }
752 spin_unlock(&mvm->tcm.lock);
753}
754
755static void
756iwl_mvm_stats_ver_15(struct iwl_mvm *mvm,
757 struct iwl_statistics_operational_ntfy *stats)
758{
759 struct iwl_mvm_stat_data_all_macs data = {
760 .mvm = mvm,
761 .flags = stats->flags,
762 .per_mac = stats->per_mac,
763 };
764
765 ieee80211_iterate_active_interfaces(mvm->hw,
766 IEEE80211_IFACE_ITER_NORMAL,
767 iwl_mvm_stat_iterator_all_macs,
768 &data);
769}
770
771static void
772iwl_mvm_stats_ver_14(struct iwl_mvm *mvm,
773 struct iwl_statistics_operational_ntfy_ver_14 *stats)
774{
775 struct iwl_mvm_stat_data data = {
776 .mvm = mvm,
777 };
778
779 u8 beacon_average_energy[MAC_INDEX_AUX];
780 __le32 flags;
781 int i;
782
783 flags = stats->flags;
784
785 data.mac_id = stats->mac_id;
786 data.beacon_filter_average_energy =
787 le32_to_cpu(stats->beacon_filter_average_energy);
788 data.flags = flags;
789 data.beacon_counter = stats->beacon_counter;
790
791 for (i = 0; i < ARRAY_SIZE(beacon_average_energy); i++)
792 beacon_average_energy[i] =
793 le32_to_cpu(stats->beacon_average_energy[i]);
794
795 data.beacon_average_energy = beacon_average_energy;
796
797 ieee80211_iterate_active_interfaces(mvm->hw,
798 IEEE80211_IFACE_ITER_NORMAL,
799 iwl_mvm_stat_iterator,
800 &data);
801}
802
803static bool iwl_mvm_verify_stats_len(struct iwl_mvm *mvm,
804 struct iwl_rx_packet *pkt,
805 u32 expected_size)
806{
807 struct iwl_statistics_ntfy_hdr *hdr;
808
809 if (WARN_ONCE(iwl_rx_packet_payload_len(pkt) < expected_size,
810 "received invalid statistics size (%d)!, expected_size: %d\n",
811 iwl_rx_packet_payload_len(pkt), expected_size))
812 return false;
813
814 hdr = (void *)&pkt->data;
815
816 if (WARN_ONCE((hdr->type & IWL_STATISTICS_TYPE_MSK) != FW_STATISTICS_OPERATIONAL ||
817 hdr->version !=
818 iwl_fw_lookup_notif_ver(mvm->fw, LEGACY_GROUP, STATISTICS_NOTIFICATION, 0),
819 "received unsupported hdr type %d, version %d\n",
820 hdr->type, hdr->version))
821 return false;
822
823 if (WARN_ONCE(le16_to_cpu(hdr->size) != expected_size,
824 "received invalid statistics size in header (%d)!, expected_size: %d\n",
825 le16_to_cpu(hdr->size), expected_size))
826 return false;
827
828 return true;
829}
830
831static void
832iwl_mvm_stat_iterator_all_links(struct iwl_mvm *mvm,
833 struct iwl_stats_ntfy_per_link *per_link)
834{
835 u32 air_time[MAC_INDEX_AUX] = {};
836 u32 rx_bytes[MAC_INDEX_AUX] = {};
837 int fw_link_id;
838
839 for (fw_link_id = 0; fw_link_id < ARRAY_SIZE(mvm->link_id_to_link_conf);
840 fw_link_id++) {
841 struct iwl_stats_ntfy_per_link *link_stats;
842 struct ieee80211_bss_conf *bss_conf;
843 struct iwl_mvm_vif *mvmvif;
844 int link_id;
845 int sig;
846
847 bss_conf = iwl_mvm_rcu_fw_link_id_to_link_conf(mvm, fw_link_id,
848 false);
849 if (!bss_conf)
850 continue;
851
852 if (bss_conf->vif->type != NL80211_IFTYPE_STATION)
853 continue;
854
855 link_id = bss_conf->link_id;
856 if (link_id >= ARRAY_SIZE(mvmvif->link))
857 continue;
858
859 mvmvif = iwl_mvm_vif_from_mac80211(bss_conf->vif);
860 if (!mvmvif || !mvmvif->link[link_id])
861 continue;
862
863 link_stats = &per_link[fw_link_id];
864
865 mvmvif->link[link_id]->beacon_stats.num_beacons =
866 le32_to_cpu(link_stats->beacon_counter);
867
868 /* we basically just use the u8 to store 8 bits and then treat
869 * it as a s8 whenever we take it out to a different type.
870 */
871 mvmvif->link[link_id]->beacon_stats.avg_signal =
872 -le32_to_cpu(link_stats->beacon_average_energy);
873
874 /* make sure that beacon statistics don't go backwards with TCM
875 * request to clear statistics
876 */
877 if (mvm->statistics_clear)
878 mvmvif->link[link_id]->beacon_stats.accu_num_beacons +=
879 mvmvif->link[link_id]->beacon_stats.num_beacons;
880
881 sig = -le32_to_cpu(link_stats->beacon_filter_average_energy);
882 iwl_mvm_update_vif_sig(bss_conf->vif, sig);
883
884 if (WARN_ONCE(mvmvif->id >= MAC_INDEX_AUX,
885 "invalid mvmvif id: %d", mvmvif->id))
886 continue;
887
888 air_time[mvmvif->id] +=
889 le32_to_cpu(per_link[fw_link_id].air_time);
890 rx_bytes[mvmvif->id] +=
891 le32_to_cpu(per_link[fw_link_id].rx_bytes);
892 }
893
894 /* Don't update in case the statistics are not cleared, since
895 * we will end up counting twice the same airtime, once in TCM
896 * request and once in statistics notification.
897 */
898 if (mvm->statistics_clear) {
899 __le32 air_time_le[MAC_INDEX_AUX];
900 __le32 rx_bytes_le[MAC_INDEX_AUX];
901 int vif_id;
902
903 for (vif_id = 0; vif_id < ARRAY_SIZE(air_time_le); vif_id++) {
904 air_time_le[vif_id] = cpu_to_le32(air_time[vif_id]);
905 rx_bytes_le[vif_id] = cpu_to_le32(rx_bytes[vif_id]);
906 }
907
908 iwl_mvm_update_tcm_from_stats(mvm, air_time_le, rx_bytes_le);
909 }
910}
911
912void iwl_mvm_handle_rx_system_oper_stats(struct iwl_mvm *mvm,
913 struct iwl_rx_cmd_buffer *rxb)
914{
915 u8 average_energy[IWL_MVM_STATION_COUNT_MAX];
916 struct iwl_rx_packet *pkt = rxb_addr(rxb);
917 struct iwl_system_statistics_notif_oper *stats;
918 int i;
919 u32 notif_ver = iwl_fw_lookup_notif_ver(mvm->fw, STATISTICS_GROUP,
920 STATISTICS_OPER_NOTIF, 0);
921
922 if (notif_ver != 3) {
923 IWL_FW_CHECK_FAILED(mvm,
924 "Oper stats notif ver %d is not supported\n",
925 notif_ver);
926 return;
927 }
928
929 stats = (void *)&pkt->data;
930 iwl_mvm_stat_iterator_all_links(mvm, stats->per_link);
931
932 for (i = 0; i < ARRAY_SIZE(average_energy); i++)
933 average_energy[i] =
934 le32_to_cpu(stats->per_sta[i].average_energy);
935
936 ieee80211_iterate_stations_atomic(mvm->hw, iwl_mvm_stats_energy_iter,
937 average_energy);
938}
939
940void iwl_mvm_handle_rx_system_oper_part1_stats(struct iwl_mvm *mvm,
941 struct iwl_rx_cmd_buffer *rxb)
942{
943 struct iwl_rx_packet *pkt = rxb_addr(rxb);
944 struct iwl_system_statistics_part1_notif_oper *part1_stats;
945 int i;
946 u32 notif_ver = iwl_fw_lookup_notif_ver(mvm->fw, STATISTICS_GROUP,
947 STATISTICS_OPER_PART1_NOTIF, 0);
948
949 if (notif_ver != 4) {
950 IWL_FW_CHECK_FAILED(mvm,
951 "Part1 stats notif ver %d is not supported\n",
952 notif_ver);
953 return;
954 }
955
956 part1_stats = (void *)&pkt->data;
957 mvm->radio_stats.rx_time = 0;
958 mvm->radio_stats.tx_time = 0;
959 for (i = 0; i < ARRAY_SIZE(part1_stats->per_link); i++) {
960 mvm->radio_stats.rx_time +=
961 le64_to_cpu(part1_stats->per_link[i].rx_time);
962 mvm->radio_stats.tx_time +=
963 le64_to_cpu(part1_stats->per_link[i].tx_time);
964 }
965}
966
967static void
968iwl_mvm_handle_rx_statistics_tlv(struct iwl_mvm *mvm,
969 struct iwl_rx_packet *pkt)
970{
971 u8 average_energy[IWL_MVM_STATION_COUNT_MAX];
972 __le32 air_time[MAC_INDEX_AUX];
973 __le32 rx_bytes[MAC_INDEX_AUX];
974 __le32 flags = 0;
975 int i;
976 u32 notif_ver = iwl_fw_lookup_notif_ver(mvm->fw, LEGACY_GROUP,
977 STATISTICS_NOTIFICATION, 0);
978
979 if (WARN_ONCE(notif_ver > 15,
980 "invalid statistics version id: %d\n", notif_ver))
981 return;
982
983 if (notif_ver == 14) {
984 struct iwl_statistics_operational_ntfy_ver_14 *stats =
985 (void *)pkt->data;
986
987 if (!iwl_mvm_verify_stats_len(mvm, pkt, sizeof(*stats)))
988 return;
989
990 iwl_mvm_stats_ver_14(mvm, stats);
991
992 flags = stats->flags;
993 mvm->radio_stats.rx_time = le64_to_cpu(stats->rx_time);
994 mvm->radio_stats.tx_time = le64_to_cpu(stats->tx_time);
995 mvm->radio_stats.on_time_rf = le64_to_cpu(stats->on_time_rf);
996 mvm->radio_stats.on_time_scan =
997 le64_to_cpu(stats->on_time_scan);
998
999 for (i = 0; i < ARRAY_SIZE(average_energy); i++)
1000 average_energy[i] = le32_to_cpu(stats->average_energy[i]);
1001
1002 for (i = 0; i < ARRAY_SIZE(air_time); i++) {
1003 air_time[i] = stats->air_time[i];
1004 rx_bytes[i] = stats->rx_bytes[i];
1005 }
1006 }
1007
1008 if (notif_ver == 15) {
1009 struct iwl_statistics_operational_ntfy *stats =
1010 (void *)pkt->data;
1011
1012 if (!iwl_mvm_verify_stats_len(mvm, pkt, sizeof(*stats)))
1013 return;
1014
1015 iwl_mvm_stats_ver_15(mvm, stats);
1016
1017 flags = stats->flags;
1018 mvm->radio_stats.rx_time = le64_to_cpu(stats->rx_time);
1019 mvm->radio_stats.tx_time = le64_to_cpu(stats->tx_time);
1020 mvm->radio_stats.on_time_rf = le64_to_cpu(stats->on_time_rf);
1021 mvm->radio_stats.on_time_scan =
1022 le64_to_cpu(stats->on_time_scan);
1023
1024 for (i = 0; i < ARRAY_SIZE(average_energy); i++)
1025 average_energy[i] =
1026 le32_to_cpu(stats->per_sta[i].average_energy);
1027
1028 for (i = 0; i < ARRAY_SIZE(air_time); i++) {
1029 air_time[i] = stats->per_mac[i].air_time;
1030 rx_bytes[i] = stats->per_mac[i].rx_bytes;
1031 }
1032 }
1033
1034 iwl_mvm_rx_stats_check_trigger(mvm, pkt);
1035
1036 ieee80211_iterate_stations_atomic(mvm->hw, iwl_mvm_stats_energy_iter,
1037 average_energy);
1038 /*
1039 * Don't update in case the statistics are not cleared, since
1040 * we will end up counting twice the same airtime, once in TCM
1041 * request and once in statistics notification.
1042 */
1043 if (le32_to_cpu(flags) & IWL_STATISTICS_REPLY_FLG_CLEAR)
1044 iwl_mvm_update_tcm_from_stats(mvm, air_time, rx_bytes);
1045}
1046
1047void iwl_mvm_handle_rx_statistics(struct iwl_mvm *mvm,
1048 struct iwl_rx_packet *pkt)
1049{
1050 struct iwl_mvm_stat_data data = {
1051 .mvm = mvm,
1052 };
1053 __le32 *bytes, *air_time, flags;
1054 int expected_size;
1055 u8 *energy;
1056 u8 cmd_ver = iwl_fw_lookup_cmd_ver(mvm->fw,
1057 WIDE_ID(SYSTEM_GROUP,
1058 SYSTEM_STATISTICS_CMD),
1059 IWL_FW_CMD_VER_UNKNOWN);
1060
1061 if (cmd_ver != IWL_FW_CMD_VER_UNKNOWN)
1062 return;
1063
1064 /* From ver 14 and up we use TLV statistics format */
1065 if (iwl_fw_lookup_notif_ver(mvm->fw, LEGACY_GROUP,
1066 STATISTICS_NOTIFICATION, 0) >= 14)
1067 return iwl_mvm_handle_rx_statistics_tlv(mvm, pkt);
1068
1069 if (!iwl_mvm_has_new_rx_stats_api(mvm)) {
1070 if (iwl_mvm_has_new_rx_api(mvm))
1071 expected_size = sizeof(struct iwl_notif_statistics_v11);
1072 else
1073 expected_size = sizeof(struct iwl_notif_statistics_v10);
1074 } else {
1075 expected_size = sizeof(struct iwl_notif_statistics);
1076 }
1077
1078 if (WARN_ONCE(iwl_rx_packet_payload_len(pkt) != expected_size,
1079 "received invalid statistics size (%d)!\n",
1080 iwl_rx_packet_payload_len(pkt)))
1081 return;
1082
1083 if (!iwl_mvm_has_new_rx_stats_api(mvm)) {
1084 struct iwl_notif_statistics_v11 *stats = (void *)&pkt->data;
1085
1086 data.mac_id = stats->rx.general.mac_id;
1087 data.beacon_filter_average_energy =
1088 stats->general.common.beacon_filter_average_energy;
1089
1090 mvm->rx_stats_v3 = stats->rx;
1091
1092 mvm->radio_stats.rx_time =
1093 le64_to_cpu(stats->general.common.rx_time);
1094 mvm->radio_stats.tx_time =
1095 le64_to_cpu(stats->general.common.tx_time);
1096 mvm->radio_stats.on_time_rf =
1097 le64_to_cpu(stats->general.common.on_time_rf);
1098 mvm->radio_stats.on_time_scan =
1099 le64_to_cpu(stats->general.common.on_time_scan);
1100
1101 data.beacon_counter = stats->general.beacon_counter;
1102 data.beacon_average_energy =
1103 stats->general.beacon_average_energy;
1104 flags = stats->flag;
1105 } else {
1106 struct iwl_notif_statistics *stats = (void *)&pkt->data;
1107
1108 data.mac_id = stats->rx.general.mac_id;
1109 data.beacon_filter_average_energy =
1110 stats->general.common.beacon_filter_average_energy;
1111
1112 mvm->rx_stats = stats->rx;
1113
1114 mvm->radio_stats.rx_time =
1115 le64_to_cpu(stats->general.common.rx_time);
1116 mvm->radio_stats.tx_time =
1117 le64_to_cpu(stats->general.common.tx_time);
1118 mvm->radio_stats.on_time_rf =
1119 le64_to_cpu(stats->general.common.on_time_rf);
1120 mvm->radio_stats.on_time_scan =
1121 le64_to_cpu(stats->general.common.on_time_scan);
1122
1123 data.beacon_counter = stats->general.beacon_counter;
1124 data.beacon_average_energy =
1125 stats->general.beacon_average_energy;
1126 flags = stats->flag;
1127 }
1128 data.flags = flags;
1129
1130 iwl_mvm_rx_stats_check_trigger(mvm, pkt);
1131
1132 ieee80211_iterate_active_interfaces(mvm->hw,
1133 IEEE80211_IFACE_ITER_NORMAL,
1134 iwl_mvm_stat_iterator,
1135 &data);
1136
1137 if (!iwl_mvm_has_new_rx_api(mvm))
1138 return;
1139
1140 if (!iwl_mvm_has_new_rx_stats_api(mvm)) {
1141 struct iwl_notif_statistics_v11 *v11 = (void *)&pkt->data;
1142
1143 energy = (void *)&v11->load_stats.avg_energy;
1144 bytes = (void *)&v11->load_stats.byte_count;
1145 air_time = (void *)&v11->load_stats.air_time;
1146 } else {
1147 struct iwl_notif_statistics *stats = (void *)&pkt->data;
1148
1149 energy = (void *)&stats->load_stats.avg_energy;
1150 bytes = (void *)&stats->load_stats.byte_count;
1151 air_time = (void *)&stats->load_stats.air_time;
1152 }
1153 ieee80211_iterate_stations_atomic(mvm->hw, iwl_mvm_stats_energy_iter,
1154 energy);
1155
1156 /*
1157 * Don't update in case the statistics are not cleared, since
1158 * we will end up counting twice the same airtime, once in TCM
1159 * request and once in statistics notification.
1160 */
1161 if (le32_to_cpu(flags) & IWL_STATISTICS_REPLY_FLG_CLEAR)
1162 iwl_mvm_update_tcm_from_stats(mvm, air_time, bytes);
1163
1164}
1165
1166void iwl_mvm_rx_statistics(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1167{
1168 iwl_mvm_handle_rx_statistics(mvm, rxb_addr(rxb));
1169}
1170
1171void iwl_mvm_window_status_notif(struct iwl_mvm *mvm,
1172 struct iwl_rx_cmd_buffer *rxb)
1173{
1174 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1175 struct iwl_ba_window_status_notif *notif = (void *)pkt->data;
1176 int i;
1177
1178 BUILD_BUG_ON(ARRAY_SIZE(notif->ra_tid) != BA_WINDOW_STREAMS_MAX);
1179 BUILD_BUG_ON(ARRAY_SIZE(notif->mpdu_rx_count) != BA_WINDOW_STREAMS_MAX);
1180 BUILD_BUG_ON(ARRAY_SIZE(notif->bitmap) != BA_WINDOW_STREAMS_MAX);
1181 BUILD_BUG_ON(ARRAY_SIZE(notif->start_seq_num) != BA_WINDOW_STREAMS_MAX);
1182
1183 rcu_read_lock();
1184 for (i = 0; i < BA_WINDOW_STREAMS_MAX; i++) {
1185 struct ieee80211_sta *sta;
1186 u8 sta_id, tid;
1187 u64 bitmap;
1188 u32 ssn;
1189 u16 ratid;
1190 u16 received_mpdu;
1191
1192 ratid = le16_to_cpu(notif->ra_tid[i]);
1193 /* check that this TID is valid */
1194 if (!(ratid & BA_WINDOW_STATUS_VALID_MSK))
1195 continue;
1196
1197 received_mpdu = le16_to_cpu(notif->mpdu_rx_count[i]);
1198 if (received_mpdu == 0)
1199 continue;
1200
1201 tid = ratid & BA_WINDOW_STATUS_TID_MSK;
1202 /* get the station */
1203 sta_id = (ratid & BA_WINDOW_STATUS_STA_ID_MSK)
1204 >> BA_WINDOW_STATUS_STA_ID_POS;
1205 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1206 if (IS_ERR_OR_NULL(sta))
1207 continue;
1208 bitmap = le64_to_cpu(notif->bitmap[i]);
1209 ssn = le32_to_cpu(notif->start_seq_num[i]);
1210
1211 /* update mac80211 with the bitmap for the reordering buffer */
1212 ieee80211_mark_rx_ba_filtered_frames(sta, tid, ssn, bitmap,
1213 received_mpdu);
1214 }
1215 rcu_read_unlock();
1216}
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) 2016 - 2017 Intel Deutschland GmbH
11 *
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.
15 *
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.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
24 * USA
25 *
26 * The full GNU General Public License is included in this distribution
27 * in the file called COPYING.
28 *
29 * Contact Information:
30 * Intel Linux Wireless <linuxwifi@intel.com>
31 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
32 *
33 * BSD LICENSE
34 *
35 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
36 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
37 * All rights reserved.
38 *
39 * Redistribution and use in source and binary forms, with or without
40 * modification, are permitted provided that the following conditions
41 * are met:
42 *
43 * * Redistributions of source code must retain the above copyright
44 * notice, this list of conditions and the following disclaimer.
45 * * Redistributions in binary form must reproduce the above copyright
46 * notice, this list of conditions and the following disclaimer in
47 * the documentation and/or other materials provided with the
48 * distribution.
49 * * Neither the name Intel Corporation nor the names of its
50 * contributors may be used to endorse or promote products derived
51 * from this software without specific prior written permission.
52 *
53 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
54 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
55 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
56 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
57 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
58 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
59 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
60 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
61 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
62 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
63 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
64 *****************************************************************************/
65#include <linux/etherdevice.h>
66#include <linux/skbuff.h>
67#include "iwl-trans.h"
68#include "mvm.h"
69#include "fw-api.h"
70
71/*
72 * iwl_mvm_rx_rx_phy_cmd - REPLY_RX_PHY_CMD handler
73 *
74 * Copies the phy information in mvm->last_phy_info, it will be used when the
75 * actual data will come from the fw in the next packet.
76 */
77void iwl_mvm_rx_rx_phy_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
78{
79 struct iwl_rx_packet *pkt = rxb_addr(rxb);
80
81 memcpy(&mvm->last_phy_info, pkt->data, sizeof(mvm->last_phy_info));
82 mvm->ampdu_ref++;
83
84#ifdef CONFIG_IWLWIFI_DEBUGFS
85 if (mvm->last_phy_info.phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) {
86 spin_lock(&mvm->drv_stats_lock);
87 mvm->drv_rx_stats.ampdu_count++;
88 spin_unlock(&mvm->drv_stats_lock);
89 }
90#endif
91}
92
93/*
94 * iwl_mvm_pass_packet_to_mac80211 - builds the packet for mac80211
95 *
96 * Adds the rxb to a new skb and give it to mac80211
97 */
98static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm,
99 struct ieee80211_sta *sta,
100 struct napi_struct *napi,
101 struct sk_buff *skb,
102 struct ieee80211_hdr *hdr, u16 len,
103 u8 crypt_len,
104 struct iwl_rx_cmd_buffer *rxb)
105{
106 unsigned int hdrlen = ieee80211_hdrlen(hdr->frame_control);
107 unsigned int fraglen;
108
109 /*
110 * The 'hdrlen' (plus the 8 bytes for the SNAP and the crypt_len,
111 * but those are all multiples of 4 long) all goes away, but we
112 * want the *end* of it, which is going to be the start of the IP
113 * header, to be aligned when it gets pulled in.
114 * The beginning of the skb->data is aligned on at least a 4-byte
115 * boundary after allocation. Everything here is aligned at least
116 * on a 2-byte boundary so we can just take hdrlen & 3 and pad by
117 * the result.
118 */
119 skb_reserve(skb, hdrlen & 3);
120
121 /* If frame is small enough to fit in skb->head, pull it completely.
122 * If not, only pull ieee80211_hdr (including crypto if present, and
123 * an additional 8 bytes for SNAP/ethertype, see below) so that
124 * splice() or TCP coalesce are more efficient.
125 *
126 * Since, in addition, ieee80211_data_to_8023() always pull in at
127 * least 8 bytes (possibly more for mesh) we can do the same here
128 * to save the cost of doing it later. That still doesn't pull in
129 * the actual IP header since the typical case has a SNAP header.
130 * If the latter changes (there are efforts in the standards group
131 * to do so) we should revisit this and ieee80211_data_to_8023().
132 */
133 hdrlen = (len <= skb_tailroom(skb)) ? len : hdrlen + crypt_len + 8;
134
135 skb_put_data(skb, hdr, hdrlen);
136 fraglen = len - hdrlen;
137
138 if (fraglen) {
139 int offset = (void *)hdr + hdrlen -
140 rxb_addr(rxb) + rxb_offset(rxb);
141
142 skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset,
143 fraglen, rxb->truesize);
144 }
145
146 ieee80211_rx_napi(mvm->hw, sta, skb, napi);
147}
148
149/*
150 * iwl_mvm_get_signal_strength - use new rx PHY INFO API
151 * values are reported by the fw as positive values - need to negate
152 * to obtain their dBM. Account for missing antennas by replacing 0
153 * values by -256dBm: practically 0 power and a non-feasible 8 bit value.
154 */
155static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm,
156 struct iwl_rx_phy_info *phy_info,
157 struct ieee80211_rx_status *rx_status)
158{
159 int energy_a, energy_b, energy_c, max_energy;
160 u32 val;
161
162 val =
163 le32_to_cpu(phy_info->non_cfg_phy[IWL_RX_INFO_ENERGY_ANT_ABC_IDX]);
164 energy_a = (val & IWL_RX_INFO_ENERGY_ANT_A_MSK) >>
165 IWL_RX_INFO_ENERGY_ANT_A_POS;
166 energy_a = energy_a ? -energy_a : S8_MIN;
167 energy_b = (val & IWL_RX_INFO_ENERGY_ANT_B_MSK) >>
168 IWL_RX_INFO_ENERGY_ANT_B_POS;
169 energy_b = energy_b ? -energy_b : S8_MIN;
170 energy_c = (val & IWL_RX_INFO_ENERGY_ANT_C_MSK) >>
171 IWL_RX_INFO_ENERGY_ANT_C_POS;
172 energy_c = energy_c ? -energy_c : S8_MIN;
173 max_energy = max(energy_a, energy_b);
174 max_energy = max(max_energy, energy_c);
175
176 IWL_DEBUG_STATS(mvm, "energy In A %d B %d C %d , and max %d\n",
177 energy_a, energy_b, energy_c, max_energy);
178
179 rx_status->signal = max_energy;
180 rx_status->chains = (le16_to_cpu(phy_info->phy_flags) &
181 RX_RES_PHY_FLAGS_ANTENNA)
182 >> RX_RES_PHY_FLAGS_ANTENNA_POS;
183 rx_status->chain_signal[0] = energy_a;
184 rx_status->chain_signal[1] = energy_b;
185 rx_status->chain_signal[2] = energy_c;
186}
187
188/*
189 * iwl_mvm_set_mac80211_rx_flag - translate fw status to mac80211 format
190 * @mvm: the mvm object
191 * @hdr: 80211 header
192 * @stats: status in mac80211's format
193 * @rx_pkt_status: status coming from fw
194 *
195 * returns non 0 value if the packet should be dropped
196 */
197static u32 iwl_mvm_set_mac80211_rx_flag(struct iwl_mvm *mvm,
198 struct ieee80211_hdr *hdr,
199 struct ieee80211_rx_status *stats,
200 u32 rx_pkt_status,
201 u8 *crypt_len)
202{
203 if (!ieee80211_has_protected(hdr->frame_control) ||
204 (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
205 RX_MPDU_RES_STATUS_SEC_NO_ENC)
206 return 0;
207
208 /* packet was encrypted with unknown alg */
209 if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
210 RX_MPDU_RES_STATUS_SEC_ENC_ERR)
211 return 0;
212
213 switch (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) {
214 case RX_MPDU_RES_STATUS_SEC_CCM_ENC:
215 /* alg is CCM: check MIC only */
216 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK))
217 return -1;
218
219 stats->flag |= RX_FLAG_DECRYPTED;
220 *crypt_len = IEEE80211_CCMP_HDR_LEN;
221 return 0;
222
223 case RX_MPDU_RES_STATUS_SEC_TKIP_ENC:
224 /* Don't drop the frame and decrypt it in SW */
225 if (!fw_has_api(&mvm->fw->ucode_capa,
226 IWL_UCODE_TLV_API_DEPRECATE_TTAK) &&
227 !(rx_pkt_status & RX_MPDU_RES_STATUS_TTAK_OK))
228 return 0;
229 *crypt_len = IEEE80211_TKIP_IV_LEN;
230 /* fall through if TTAK OK */
231
232 case RX_MPDU_RES_STATUS_SEC_WEP_ENC:
233 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_ICV_OK))
234 return -1;
235
236 stats->flag |= RX_FLAG_DECRYPTED;
237 if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
238 RX_MPDU_RES_STATUS_SEC_WEP_ENC)
239 *crypt_len = IEEE80211_WEP_IV_LEN;
240 return 0;
241
242 case RX_MPDU_RES_STATUS_SEC_EXT_ENC:
243 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK))
244 return -1;
245 stats->flag |= RX_FLAG_DECRYPTED;
246 return 0;
247
248 default:
249 /* Expected in monitor (not having the keys) */
250 if (!mvm->monitor_on)
251 IWL_ERR(mvm, "Unhandled alg: 0x%x\n", rx_pkt_status);
252 }
253
254 return 0;
255}
256
257static void iwl_mvm_rx_csum(struct ieee80211_sta *sta,
258 struct sk_buff *skb,
259 u32 status)
260{
261 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
262 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
263
264 if (mvmvif->features & NETIF_F_RXCSUM &&
265 status & RX_MPDU_RES_STATUS_CSUM_DONE &&
266 status & RX_MPDU_RES_STATUS_CSUM_OK)
267 skb->ip_summed = CHECKSUM_UNNECESSARY;
268}
269
270/*
271 * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler
272 *
273 * Handles the actual data of the Rx packet from the fw
274 */
275void iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct napi_struct *napi,
276 struct iwl_rx_cmd_buffer *rxb)
277{
278 struct ieee80211_hdr *hdr;
279 struct ieee80211_rx_status *rx_status;
280 struct iwl_rx_packet *pkt = rxb_addr(rxb);
281 struct iwl_rx_phy_info *phy_info;
282 struct iwl_rx_mpdu_res_start *rx_res;
283 struct ieee80211_sta *sta = NULL;
284 struct sk_buff *skb;
285 u32 len;
286 u32 rate_n_flags;
287 u32 rx_pkt_status;
288 u8 crypt_len = 0;
289 bool take_ref;
290
291 phy_info = &mvm->last_phy_info;
292 rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data;
293 hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res));
294 len = le16_to_cpu(rx_res->byte_count);
295 rx_pkt_status = le32_to_cpup((__le32 *)
296 (pkt->data + sizeof(*rx_res) + len));
297
298 /* Dont use dev_alloc_skb(), we'll have enough headroom once
299 * ieee80211_hdr pulled.
300 */
301 skb = alloc_skb(128, GFP_ATOMIC);
302 if (!skb) {
303 IWL_ERR(mvm, "alloc_skb failed\n");
304 return;
305 }
306
307 rx_status = IEEE80211_SKB_RXCB(skb);
308
309 /*
310 * drop the packet if it has failed being decrypted by HW
311 */
312 if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, rx_status, rx_pkt_status,
313 &crypt_len)) {
314 IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n",
315 rx_pkt_status);
316 kfree_skb(skb);
317 return;
318 }
319
320 /*
321 * Keep packets with CRC errors (and with overrun) for monitor mode
322 * (otherwise the firmware discards them) but mark them as bad.
323 */
324 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) ||
325 !(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) {
326 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status);
327 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
328 }
329
330 /* This will be used in several places later */
331 rate_n_flags = le32_to_cpu(phy_info->rate_n_flags);
332
333 /* rx_status carries information about the packet to mac80211 */
334 rx_status->mactime = le64_to_cpu(phy_info->timestamp);
335 rx_status->device_timestamp = le32_to_cpu(phy_info->system_timestamp);
336 rx_status->band =
337 (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ?
338 NL80211_BAND_2GHZ : NL80211_BAND_5GHZ;
339 rx_status->freq =
340 ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel),
341 rx_status->band);
342
343 /* TSF as indicated by the firmware is at INA time */
344 rx_status->flag |= RX_FLAG_MACTIME_PLCP_START;
345
346 iwl_mvm_get_signal_strength(mvm, phy_info, rx_status);
347
348 IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status->signal,
349 (unsigned long long)rx_status->mactime);
350
351 rcu_read_lock();
352 if (rx_pkt_status & RX_MPDU_RES_STATUS_SRC_STA_FOUND) {
353 u32 id = rx_pkt_status & RX_MPDU_RES_STATUS_STA_ID_MSK;
354
355 id >>= RX_MDPU_RES_STATUS_STA_ID_SHIFT;
356
357 if (!WARN_ON_ONCE(id >= ARRAY_SIZE(mvm->fw_id_to_mac_id))) {
358 sta = rcu_dereference(mvm->fw_id_to_mac_id[id]);
359 if (IS_ERR(sta))
360 sta = NULL;
361 }
362 } else if (!is_multicast_ether_addr(hdr->addr2)) {
363 /* This is fine since we prevent two stations with the same
364 * address from being added.
365 */
366 sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL);
367 }
368
369 if (sta) {
370 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
371 struct ieee80211_vif *tx_blocked_vif =
372 rcu_dereference(mvm->csa_tx_blocked_vif);
373
374 /* We have tx blocked stations (with CS bit). If we heard
375 * frames from a blocked station on a new channel we can
376 * TX to it again.
377 */
378 if (unlikely(tx_blocked_vif) &&
379 mvmsta->vif == tx_blocked_vif) {
380 struct iwl_mvm_vif *mvmvif =
381 iwl_mvm_vif_from_mac80211(tx_blocked_vif);
382
383 if (mvmvif->csa_target_freq == rx_status->freq)
384 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta,
385 false);
386 }
387
388 rs_update_last_rssi(mvm, mvmsta, rx_status);
389
390 if (iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_RSSI) &&
391 ieee80211_is_beacon(hdr->frame_control)) {
392 struct iwl_fw_dbg_trigger_tlv *trig;
393 struct iwl_fw_dbg_trigger_low_rssi *rssi_trig;
394 bool trig_check;
395 s32 rssi;
396
397 trig = iwl_fw_dbg_get_trigger(mvm->fw,
398 FW_DBG_TRIGGER_RSSI);
399 rssi_trig = (void *)trig->data;
400 rssi = le32_to_cpu(rssi_trig->rssi);
401
402 trig_check =
403 iwl_fw_dbg_trigger_check_stop(&mvm->fwrt,
404 ieee80211_vif_to_wdev(mvmsta->vif),
405 trig);
406 if (trig_check && rx_status->signal < rssi)
407 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
408 NULL);
409 }
410
411 if (ieee80211_is_data(hdr->frame_control))
412 iwl_mvm_rx_csum(sta, skb, rx_pkt_status);
413 }
414 rcu_read_unlock();
415
416 /* set the preamble flag if appropriate */
417 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE))
418 rx_status->enc_flags |= RX_ENC_FLAG_SHORTPRE;
419
420 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) {
421 /*
422 * We know which subframes of an A-MPDU belong
423 * together since we get a single PHY response
424 * from the firmware for all of them
425 */
426 rx_status->flag |= RX_FLAG_AMPDU_DETAILS;
427 rx_status->ampdu_reference = mvm->ampdu_ref;
428 }
429
430 /* Set up the HT phy flags */
431 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
432 case RATE_MCS_CHAN_WIDTH_20:
433 break;
434 case RATE_MCS_CHAN_WIDTH_40:
435 rx_status->bw = RATE_INFO_BW_40;
436 break;
437 case RATE_MCS_CHAN_WIDTH_80:
438 rx_status->bw = RATE_INFO_BW_80;
439 break;
440 case RATE_MCS_CHAN_WIDTH_160:
441 rx_status->bw = RATE_INFO_BW_160;
442 break;
443 }
444 if (!(rate_n_flags & RATE_MCS_CCK_MSK) &&
445 rate_n_flags & RATE_MCS_SGI_MSK)
446 rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
447 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
448 rx_status->enc_flags |= RX_ENC_FLAG_HT_GF;
449 if (rate_n_flags & RATE_MCS_LDPC_MSK)
450 rx_status->enc_flags |= RX_ENC_FLAG_LDPC;
451 if (rate_n_flags & RATE_MCS_HT_MSK) {
452 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >>
453 RATE_MCS_STBC_POS;
454 rx_status->encoding = RX_ENC_HT;
455 rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
456 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
457 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
458 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >>
459 RATE_MCS_STBC_POS;
460 rx_status->nss =
461 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
462 RATE_VHT_MCS_NSS_POS) + 1;
463 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;
464 rx_status->encoding = RX_ENC_VHT;
465 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
466 if (rate_n_flags & RATE_MCS_BF_MSK)
467 rx_status->enc_flags |= RX_ENC_FLAG_BF;
468 } else {
469 int rate = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
470 rx_status->band);
471
472 if (WARN(rate < 0 || rate > 0xFF,
473 "Invalid rate flags 0x%x, band %d,\n",
474 rate_n_flags, rx_status->band)) {
475 kfree_skb(skb);
476 return;
477 }
478 rx_status->rate_idx = rate;
479 }
480
481#ifdef CONFIG_IWLWIFI_DEBUGFS
482 iwl_mvm_update_frame_stats(mvm, rate_n_flags,
483 rx_status->flag & RX_FLAG_AMPDU_DETAILS);
484#endif
485
486 if (unlikely((ieee80211_is_beacon(hdr->frame_control) ||
487 ieee80211_is_probe_resp(hdr->frame_control)) &&
488 mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED))
489 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND;
490
491 if (unlikely(ieee80211_is_beacon(hdr->frame_control) ||
492 ieee80211_is_probe_resp(hdr->frame_control)))
493 rx_status->boottime_ns = ktime_get_boot_ns();
494
495 /* Take a reference briefly to kick off a d0i3 entry delay so
496 * we can handle bursts of RX packets without toggling the
497 * state too often. But don't do this for beacons if we are
498 * going to idle because the beacon filtering changes we make
499 * cause the firmware to send us collateral beacons. */
500 take_ref = !(test_bit(STATUS_TRANS_GOING_IDLE, &mvm->trans->status) &&
501 ieee80211_is_beacon(hdr->frame_control));
502
503 if (take_ref)
504 iwl_mvm_ref(mvm, IWL_MVM_REF_RX);
505
506 iwl_mvm_pass_packet_to_mac80211(mvm, sta, napi, skb, hdr, len,
507 crypt_len, rxb);
508
509 if (take_ref)
510 iwl_mvm_unref(mvm, IWL_MVM_REF_RX);
511}
512
513struct iwl_mvm_stat_data {
514 struct iwl_mvm *mvm;
515 __le32 mac_id;
516 u8 beacon_filter_average_energy;
517 void *general;
518};
519
520static void iwl_mvm_stat_iterator(void *_data, u8 *mac,
521 struct ieee80211_vif *vif)
522{
523 struct iwl_mvm_stat_data *data = _data;
524 struct iwl_mvm *mvm = data->mvm;
525 int sig = -data->beacon_filter_average_energy;
526 int last_event;
527 int thold = vif->bss_conf.cqm_rssi_thold;
528 int hyst = vif->bss_conf.cqm_rssi_hyst;
529 u16 id = le32_to_cpu(data->mac_id);
530 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
531
532 /* This doesn't need the MAC ID check since it's not taking the
533 * data copied into the "data" struct, but rather the data from
534 * the notification directly.
535 */
536 if (data->general) {
537 u16 vif_id = mvmvif->id;
538
539 if (iwl_mvm_is_cdb_supported(mvm)) {
540 struct mvm_statistics_general_cdb *general =
541 data->general;
542
543 mvmvif->beacon_stats.num_beacons =
544 le32_to_cpu(general->beacon_counter[vif_id]);
545 mvmvif->beacon_stats.avg_signal =
546 -general->beacon_average_energy[vif_id];
547 } else {
548 struct mvm_statistics_general_v8 *general =
549 data->general;
550
551 mvmvif->beacon_stats.num_beacons =
552 le32_to_cpu(general->beacon_counter[vif_id]);
553 mvmvif->beacon_stats.avg_signal =
554 -general->beacon_average_energy[vif_id];
555 }
556 }
557
558 if (mvmvif->id != id)
559 return;
560
561 if (vif->type != NL80211_IFTYPE_STATION)
562 return;
563
564 if (sig == 0) {
565 IWL_DEBUG_RX(mvm, "RSSI is 0 - skip signal based decision\n");
566 return;
567 }
568
569 mvmvif->bf_data.ave_beacon_signal = sig;
570
571 /* BT Coex */
572 if (mvmvif->bf_data.bt_coex_min_thold !=
573 mvmvif->bf_data.bt_coex_max_thold) {
574 last_event = mvmvif->bf_data.last_bt_coex_event;
575 if (sig > mvmvif->bf_data.bt_coex_max_thold &&
576 (last_event <= mvmvif->bf_data.bt_coex_min_thold ||
577 last_event == 0)) {
578 mvmvif->bf_data.last_bt_coex_event = sig;
579 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex high %d\n",
580 sig);
581 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_HIGH);
582 } else if (sig < mvmvif->bf_data.bt_coex_min_thold &&
583 (last_event >= mvmvif->bf_data.bt_coex_max_thold ||
584 last_event == 0)) {
585 mvmvif->bf_data.last_bt_coex_event = sig;
586 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex low %d\n",
587 sig);
588 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_LOW);
589 }
590 }
591
592 if (!(vif->driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI))
593 return;
594
595 /* CQM Notification */
596 last_event = mvmvif->bf_data.last_cqm_event;
597 if (thold && sig < thold && (last_event == 0 ||
598 sig < last_event - hyst)) {
599 mvmvif->bf_data.last_cqm_event = sig;
600 IWL_DEBUG_RX(mvm, "cqm_iterator cqm low %d\n",
601 sig);
602 ieee80211_cqm_rssi_notify(
603 vif,
604 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
605 sig,
606 GFP_KERNEL);
607 } else if (sig > thold &&
608 (last_event == 0 || sig > last_event + hyst)) {
609 mvmvif->bf_data.last_cqm_event = sig;
610 IWL_DEBUG_RX(mvm, "cqm_iterator cqm high %d\n",
611 sig);
612 ieee80211_cqm_rssi_notify(
613 vif,
614 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
615 sig,
616 GFP_KERNEL);
617 }
618}
619
620static inline void
621iwl_mvm_rx_stats_check_trigger(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt)
622{
623 struct iwl_fw_dbg_trigger_tlv *trig;
624 struct iwl_fw_dbg_trigger_stats *trig_stats;
625 u32 trig_offset, trig_thold;
626
627 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_STATS))
628 return;
629
630 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_STATS);
631 trig_stats = (void *)trig->data;
632
633 if (!iwl_fw_dbg_trigger_check_stop(&mvm->fwrt, NULL, trig))
634 return;
635
636 trig_offset = le32_to_cpu(trig_stats->stop_offset);
637 trig_thold = le32_to_cpu(trig_stats->stop_threshold);
638
639 if (WARN_ON_ONCE(trig_offset >= iwl_rx_packet_payload_len(pkt)))
640 return;
641
642 if (le32_to_cpup((__le32 *) (pkt->data + trig_offset)) < trig_thold)
643 return;
644
645 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, NULL);
646}
647
648void iwl_mvm_handle_rx_statistics(struct iwl_mvm *mvm,
649 struct iwl_rx_packet *pkt)
650{
651 struct iwl_mvm_stat_data data = {
652 .mvm = mvm,
653 };
654 int expected_size;
655 int i;
656 u8 *energy;
657 __le32 *bytes, *air_time;
658 __le32 flags;
659
660 if (!iwl_mvm_has_new_rx_stats_api(mvm)) {
661 if (iwl_mvm_has_new_rx_api(mvm))
662 expected_size = sizeof(struct iwl_notif_statistics_v11);
663 else
664 expected_size = sizeof(struct iwl_notif_statistics_v10);
665 } else {
666 expected_size = sizeof(struct iwl_notif_statistics_cdb);
667 }
668
669 if (WARN_ONCE(iwl_rx_packet_payload_len(pkt) != expected_size,
670 "received invalid statistics size (%d)!\n",
671 iwl_rx_packet_payload_len(pkt)))
672 return;
673
674 if (!iwl_mvm_has_new_rx_stats_api(mvm)) {
675 struct iwl_notif_statistics_v11 *stats = (void *)&pkt->data;
676
677 data.mac_id = stats->rx.general.mac_id;
678 data.beacon_filter_average_energy =
679 stats->general.common.beacon_filter_average_energy;
680
681 mvm->rx_stats_v3 = stats->rx;
682
683 mvm->radio_stats.rx_time =
684 le64_to_cpu(stats->general.common.rx_time);
685 mvm->radio_stats.tx_time =
686 le64_to_cpu(stats->general.common.tx_time);
687 mvm->radio_stats.on_time_rf =
688 le64_to_cpu(stats->general.common.on_time_rf);
689 mvm->radio_stats.on_time_scan =
690 le64_to_cpu(stats->general.common.on_time_scan);
691
692 data.general = &stats->general;
693
694 flags = stats->flag;
695 } else {
696 struct iwl_notif_statistics_cdb *stats = (void *)&pkt->data;
697
698 data.mac_id = stats->rx.general.mac_id;
699 data.beacon_filter_average_energy =
700 stats->general.common.beacon_filter_average_energy;
701
702 mvm->rx_stats = stats->rx;
703
704 mvm->radio_stats.rx_time =
705 le64_to_cpu(stats->general.common.rx_time);
706 mvm->radio_stats.tx_time =
707 le64_to_cpu(stats->general.common.tx_time);
708 mvm->radio_stats.on_time_rf =
709 le64_to_cpu(stats->general.common.on_time_rf);
710 mvm->radio_stats.on_time_scan =
711 le64_to_cpu(stats->general.common.on_time_scan);
712
713 data.general = &stats->general;
714
715 flags = stats->flag;
716 }
717
718 iwl_mvm_rx_stats_check_trigger(mvm, pkt);
719
720 ieee80211_iterate_active_interfaces(mvm->hw,
721 IEEE80211_IFACE_ITER_NORMAL,
722 iwl_mvm_stat_iterator,
723 &data);
724
725 if (!iwl_mvm_has_new_rx_api(mvm))
726 return;
727
728 if (!iwl_mvm_has_new_rx_stats_api(mvm)) {
729 struct iwl_notif_statistics_v11 *v11 = (void *)&pkt->data;
730
731 energy = (void *)&v11->load_stats.avg_energy;
732 bytes = (void *)&v11->load_stats.byte_count;
733 air_time = (void *)&v11->load_stats.air_time;
734 } else {
735 struct iwl_notif_statistics_cdb *stats = (void *)&pkt->data;
736
737 energy = (void *)&stats->load_stats.avg_energy;
738 bytes = (void *)&stats->load_stats.byte_count;
739 air_time = (void *)&stats->load_stats.air_time;
740 }
741
742 rcu_read_lock();
743 for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) {
744 struct iwl_mvm_sta *sta;
745
746 if (!energy[i])
747 continue;
748
749 sta = iwl_mvm_sta_from_staid_rcu(mvm, i);
750 if (!sta)
751 continue;
752 sta->avg_energy = energy[i];
753 }
754 rcu_read_unlock();
755}
756
757void iwl_mvm_rx_statistics(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
758{
759 iwl_mvm_handle_rx_statistics(mvm, rxb_addr(rxb));
760}
761
762void iwl_mvm_window_status_notif(struct iwl_mvm *mvm,
763 struct iwl_rx_cmd_buffer *rxb)
764{
765 struct iwl_rx_packet *pkt = rxb_addr(rxb);
766 struct iwl_ba_window_status_notif *notif = (void *)pkt->data;
767 int i;
768 u32 pkt_len = iwl_rx_packet_payload_len(pkt);
769
770 if (WARN_ONCE(pkt_len != sizeof(*notif),
771 "Received window status notification of wrong size (%u)\n",
772 pkt_len))
773 return;
774
775 rcu_read_lock();
776 for (i = 0; i < BA_WINDOW_STREAMS_MAX; i++) {
777 struct ieee80211_sta *sta;
778 u8 sta_id, tid;
779 u64 bitmap;
780 u32 ssn;
781 u16 ratid;
782 u16 received_mpdu;
783
784 ratid = le16_to_cpu(notif->ra_tid[i]);
785 /* check that this TID is valid */
786 if (!(ratid & BA_WINDOW_STATUS_VALID_MSK))
787 continue;
788
789 received_mpdu = le16_to_cpu(notif->mpdu_rx_count[i]);
790 if (received_mpdu == 0)
791 continue;
792
793 tid = ratid & BA_WINDOW_STATUS_TID_MSK;
794 /* get the station */
795 sta_id = (ratid & BA_WINDOW_STATUS_STA_ID_MSK)
796 >> BA_WINDOW_STATUS_STA_ID_POS;
797 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
798 if (IS_ERR_OR_NULL(sta))
799 continue;
800 bitmap = le64_to_cpu(notif->bitmap[i]);
801 ssn = le32_to_cpu(notif->start_seq_num[i]);
802
803 /* update mac80211 with the bitmap for the reordering buffer */
804 ieee80211_mark_rx_ba_filtered_frames(sta, tid, ssn, bitmap,
805 received_mpdu);
806 }
807 rcu_read_unlock();
808}