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 */
iwl_mvm_rx_rx_phy_cmd(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)20 void 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 */
iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm * mvm,struct ieee80211_sta * sta,struct napi_struct * napi,struct sk_buff * skb,struct ieee80211_hdr * hdr,u16 len,u8 crypt_len,struct iwl_rx_cmd_buffer * rxb)45 static 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 */
iwl_mvm_get_signal_strength(struct iwl_mvm * mvm,struct iwl_rx_phy_info * phy_info,struct ieee80211_rx_status * rx_status)102 static 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 */
iwl_mvm_set_mac80211_rx_flag(struct iwl_mvm * mvm,struct ieee80211_hdr * hdr,struct ieee80211_rx_status * stats,u32 rx_pkt_status,u8 * crypt_len)139 static 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 defined(__linux__)
193 if (!mvm->monitor_on)
194 IWL_WARN(mvm, "Unhandled alg: 0x%x\n", rx_pkt_status);
195 #elif defined(__FreeBSD__)
196 if (!mvm->monitor_on && net_ratelimit())
197 IWL_WARN(mvm, "%s: Unhandled alg: 0x%x\n", __func__, rx_pkt_status);
198 #endif
199 }
200
201 return 0;
202 }
203
iwl_mvm_rx_handle_tcm(struct iwl_mvm * mvm,struct ieee80211_sta * sta,struct ieee80211_hdr * hdr,u32 len,struct iwl_rx_phy_info * phy_info,u32 rate_n_flags)204 static void iwl_mvm_rx_handle_tcm(struct iwl_mvm *mvm,
205 struct ieee80211_sta *sta,
206 struct ieee80211_hdr *hdr, u32 len,
207 struct iwl_rx_phy_info *phy_info,
208 u32 rate_n_flags)
209 {
210 struct iwl_mvm_sta *mvmsta;
211 struct iwl_mvm_tcm_mac *mdata;
212 int mac;
213 int ac = IEEE80211_AC_BE; /* treat non-QoS as BE */
214 struct iwl_mvm_vif *mvmvif;
215 /* expected throughput in 100Kbps, single stream, 20 MHz */
216 static const u8 thresh_tpt[] = {
217 9, 18, 30, 42, 60, 78, 90, 96, 120, 135,
218 };
219 u16 thr;
220
221 if (ieee80211_is_data_qos(hdr->frame_control)) {
222 u8 tid = ieee80211_get_tid(hdr);
223
224 if (tid < IWL_MAX_TID_COUNT)
225 ac = tid_to_mac80211_ac[tid];
226 }
227
228 mvmsta = iwl_mvm_sta_from_mac80211(sta);
229 mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
230
231 if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD))
232 schedule_delayed_work(&mvm->tcm.work, 0);
233 mdata = &mvm->tcm.data[mac];
234 mdata->rx.pkts[ac]++;
235
236 /* count the airtime only once for each ampdu */
237 if (mdata->rx.last_ampdu_ref != mvm->ampdu_ref) {
238 mdata->rx.last_ampdu_ref = mvm->ampdu_ref;
239 mdata->rx.airtime += le16_to_cpu(phy_info->frame_time);
240 }
241
242 if (!(rate_n_flags & (RATE_MCS_HT_MSK_V1 | RATE_MCS_VHT_MSK_V1)))
243 return;
244
245 mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
246
247 if (mdata->opened_rx_ba_sessions ||
248 mdata->uapsd_nonagg_detect.detected ||
249 (!mvmvif->deflink.queue_params[IEEE80211_AC_VO].uapsd &&
250 !mvmvif->deflink.queue_params[IEEE80211_AC_VI].uapsd &&
251 !mvmvif->deflink.queue_params[IEEE80211_AC_BE].uapsd &&
252 !mvmvif->deflink.queue_params[IEEE80211_AC_BK].uapsd) ||
253 mvmsta->deflink.sta_id != mvmvif->deflink.ap_sta_id)
254 return;
255
256 if (rate_n_flags & RATE_MCS_HT_MSK_V1) {
257 thr = thresh_tpt[rate_n_flags & RATE_HT_MCS_RATE_CODE_MSK_V1];
258 thr *= 1 + ((rate_n_flags & RATE_HT_MCS_NSS_MSK_V1) >>
259 RATE_HT_MCS_NSS_POS_V1);
260 } else {
261 if (WARN_ON((rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK) >=
262 ARRAY_SIZE(thresh_tpt)))
263 return;
264 thr = thresh_tpt[rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK];
265 thr *= 1 + FIELD_GET(RATE_MCS_NSS_MSK, rate_n_flags);
266 }
267
268 thr <<= ((rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK_V1) >>
269 RATE_MCS_CHAN_WIDTH_POS);
270
271 mdata->uapsd_nonagg_detect.rx_bytes += len;
272 ewma_rate_add(&mdata->uapsd_nonagg_detect.rate, thr);
273 }
274
iwl_mvm_rx_csum(struct ieee80211_sta * sta,struct sk_buff * skb,u32 status)275 static void iwl_mvm_rx_csum(struct ieee80211_sta *sta,
276 struct sk_buff *skb,
277 u32 status)
278 {
279 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
280 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
281
282 if (mvmvif->features & NETIF_F_RXCSUM &&
283 status & RX_MPDU_RES_STATUS_CSUM_DONE &&
284 status & RX_MPDU_RES_STATUS_CSUM_OK)
285 skb->ip_summed = CHECKSUM_UNNECESSARY;
286 }
287
288 /*
289 * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler
290 *
291 * Handles the actual data of the Rx packet from the fw
292 */
iwl_mvm_rx_rx_mpdu(struct iwl_mvm * mvm,struct napi_struct * napi,struct iwl_rx_cmd_buffer * rxb)293 void iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct napi_struct *napi,
294 struct iwl_rx_cmd_buffer *rxb)
295 {
296 struct ieee80211_hdr *hdr;
297 struct ieee80211_rx_status *rx_status;
298 struct iwl_rx_packet *pkt = rxb_addr(rxb);
299 struct iwl_rx_phy_info *phy_info;
300 struct iwl_rx_mpdu_res_start *rx_res;
301 struct ieee80211_sta *sta = NULL;
302 struct sk_buff *skb;
303 u32 len, pkt_len = iwl_rx_packet_payload_len(pkt);
304 u32 rate_n_flags;
305 u32 rx_pkt_status;
306 u8 crypt_len = 0;
307
308 if (unlikely(pkt_len < sizeof(*rx_res))) {
309 IWL_DEBUG_DROP(mvm, "Bad REPLY_RX_MPDU_CMD size\n");
310 return;
311 }
312
313 phy_info = &mvm->last_phy_info;
314 rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data;
315 hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res));
316 len = le16_to_cpu(rx_res->byte_count);
317
318 if (unlikely(len + sizeof(*rx_res) + sizeof(__le32) > pkt_len)) {
319 IWL_DEBUG_DROP(mvm, "FW lied about packet len\n");
320 return;
321 }
322
323 rx_pkt_status = get_unaligned_le32((__le32 *)
324 (pkt->data + sizeof(*rx_res) + len));
325
326 /* Dont use dev_alloc_skb(), we'll have enough headroom once
327 * ieee80211_hdr pulled.
328 */
329 skb = alloc_skb(128, GFP_ATOMIC);
330 if (!skb) {
331 IWL_ERR(mvm, "alloc_skb failed\n");
332 return;
333 }
334
335 rx_status = IEEE80211_SKB_RXCB(skb);
336
337 /*
338 * Keep packets with CRC errors (and with overrun) for monitor mode
339 * (otherwise the firmware discards them) but mark them as bad.
340 */
341 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) ||
342 !(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) {
343 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status);
344 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
345 }
346
347 /* This will be used in several places later */
348 rate_n_flags = le32_to_cpu(phy_info->rate_n_flags);
349
350 /* rx_status carries information about the packet to mac80211 */
351 rx_status->mactime = le64_to_cpu(phy_info->timestamp);
352 rx_status->device_timestamp = le32_to_cpu(phy_info->system_timestamp);
353 rx_status->band =
354 (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ?
355 NL80211_BAND_2GHZ : NL80211_BAND_5GHZ;
356 rx_status->freq =
357 ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel),
358 rx_status->band);
359
360 /* TSF as indicated by the firmware is at INA time */
361 rx_status->flag |= RX_FLAG_MACTIME_PLCP_START;
362
363 iwl_mvm_get_signal_strength(mvm, phy_info, rx_status);
364
365 IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status->signal,
366 (unsigned long long)rx_status->mactime);
367
368 rcu_read_lock();
369 if (rx_pkt_status & RX_MPDU_RES_STATUS_SRC_STA_FOUND) {
370 u32 id = rx_pkt_status & RX_MPDU_RES_STATUS_STA_ID_MSK;
371
372 id >>= RX_MDPU_RES_STATUS_STA_ID_SHIFT;
373
374 if (!WARN_ON_ONCE(id >= mvm->fw->ucode_capa.num_stations)) {
375 sta = rcu_dereference(mvm->fw_id_to_mac_id[id]);
376 if (IS_ERR(sta))
377 sta = NULL;
378 }
379 } else if (!is_multicast_ether_addr(hdr->addr2)) {
380 /* This is fine since we prevent two stations with the same
381 * address from being added.
382 */
383 sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL);
384 }
385
386 if (sta) {
387 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
388 struct ieee80211_vif *vif = mvmsta->vif;
389 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
390
391 /*
392 * Don't even try to decrypt a MCAST frame that was received
393 * before the managed vif is authorized, we'd fail anyway.
394 */
395 if (is_multicast_ether_addr(hdr->addr1) &&
396 vif->type == NL80211_IFTYPE_STATION &&
397 !mvmvif->authorized &&
398 ieee80211_has_protected(hdr->frame_control)) {
399 IWL_DEBUG_DROP(mvm, "MCAST before the vif is authorized\n");
400 kfree_skb(skb);
401 rcu_read_unlock();
402 return;
403 }
404 }
405
406 /*
407 * drop the packet if it has failed being decrypted by HW
408 */
409 if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, rx_status, rx_pkt_status,
410 &crypt_len)) {
411 IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n",
412 rx_pkt_status);
413 kfree_skb(skb);
414 rcu_read_unlock();
415 return;
416 }
417
418 if (sta) {
419 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
420 struct ieee80211_vif *tx_blocked_vif =
421 rcu_dereference(mvm->csa_tx_blocked_vif);
422 struct iwl_fw_dbg_trigger_tlv *trig;
423 struct ieee80211_vif *vif = mvmsta->vif;
424
425 /* We have tx blocked stations (with CS bit). If we heard
426 * frames from a blocked station on a new channel we can
427 * TX to it again.
428 */
429 if (unlikely(tx_blocked_vif) && vif == tx_blocked_vif) {
430 struct iwl_mvm_vif *mvmvif =
431 iwl_mvm_vif_from_mac80211(tx_blocked_vif);
432
433 if (mvmvif->csa_target_freq == rx_status->freq)
434 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta,
435 false);
436 }
437
438 rs_update_last_rssi(mvm, mvmsta, rx_status);
439
440 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt,
441 ieee80211_vif_to_wdev(vif),
442 FW_DBG_TRIGGER_RSSI);
443
444 if (trig && ieee80211_is_beacon(hdr->frame_control)) {
445 struct iwl_fw_dbg_trigger_low_rssi *rssi_trig;
446 s32 rssi;
447
448 rssi_trig = (void *)trig->data;
449 rssi = le32_to_cpu(rssi_trig->rssi);
450
451 if (rx_status->signal < rssi)
452 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
453 #if defined(__linux__)
454 NULL);
455 #elif defined(__FreeBSD__)
456 "");
457 #endif
458 }
459
460 if (!mvm->tcm.paused && len >= sizeof(*hdr) &&
461 !is_multicast_ether_addr(hdr->addr1) &&
462 ieee80211_is_data(hdr->frame_control))
463 iwl_mvm_rx_handle_tcm(mvm, sta, hdr, len, phy_info,
464 rate_n_flags);
465
466 if (ieee80211_is_data(hdr->frame_control))
467 iwl_mvm_rx_csum(sta, skb, rx_pkt_status);
468 }
469 rcu_read_unlock();
470
471 /* set the preamble flag if appropriate */
472 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE))
473 rx_status->enc_flags |= RX_ENC_FLAG_SHORTPRE;
474
475 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) {
476 /*
477 * We know which subframes of an A-MPDU belong
478 * together since we get a single PHY response
479 * from the firmware for all of them
480 */
481 rx_status->flag |= RX_FLAG_AMPDU_DETAILS;
482 rx_status->ampdu_reference = mvm->ampdu_ref;
483 }
484
485 /* Set up the HT phy flags */
486 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK_V1) {
487 case RATE_MCS_CHAN_WIDTH_20:
488 break;
489 case RATE_MCS_CHAN_WIDTH_40:
490 rx_status->bw = RATE_INFO_BW_40;
491 break;
492 case RATE_MCS_CHAN_WIDTH_80:
493 rx_status->bw = RATE_INFO_BW_80;
494 break;
495 case RATE_MCS_CHAN_WIDTH_160:
496 rx_status->bw = RATE_INFO_BW_160;
497 break;
498 }
499 if (!(rate_n_flags & RATE_MCS_CCK_MSK_V1) &&
500 rate_n_flags & RATE_MCS_SGI_MSK_V1)
501 rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
502 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
503 rx_status->enc_flags |= RX_ENC_FLAG_HT_GF;
504 if (rate_n_flags & RATE_MCS_LDPC_MSK_V1)
505 rx_status->enc_flags |= RX_ENC_FLAG_LDPC;
506 if (rate_n_flags & RATE_MCS_HT_MSK_V1) {
507 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >>
508 RATE_MCS_STBC_POS;
509 rx_status->encoding = RX_ENC_HT;
510 rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK_V1;
511 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
512 } else if (rate_n_flags & RATE_MCS_VHT_MSK_V1) {
513 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >>
514 RATE_MCS_STBC_POS;
515 rx_status->nss =
516 FIELD_GET(RATE_MCS_NSS_MSK, rate_n_flags) + 1;
517 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;
518 rx_status->encoding = RX_ENC_VHT;
519 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
520 if (rate_n_flags & RATE_MCS_BF_MSK)
521 rx_status->enc_flags |= RX_ENC_FLAG_BF;
522 } else {
523 int rate = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
524 rx_status->band);
525
526 if (WARN(rate < 0 || rate > 0xFF,
527 "Invalid rate flags 0x%x, band %d,\n",
528 rate_n_flags, rx_status->band)) {
529 kfree_skb(skb);
530 return;
531 }
532 rx_status->rate_idx = rate;
533 }
534
535 #ifdef CONFIG_IWLWIFI_DEBUGFS
536 iwl_mvm_update_frame_stats(mvm, rate_n_flags,
537 rx_status->flag & RX_FLAG_AMPDU_DETAILS);
538 #endif
539
540 if (unlikely((ieee80211_is_beacon(hdr->frame_control) ||
541 ieee80211_is_probe_resp(hdr->frame_control)) &&
542 mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED))
543 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND;
544
545 if (unlikely(ieee80211_is_beacon(hdr->frame_control) ||
546 ieee80211_is_probe_resp(hdr->frame_control)))
547 rx_status->boottime_ns = ktime_get_boottime_ns();
548
549 iwl_mvm_pass_packet_to_mac80211(mvm, sta, napi, skb, hdr, len,
550 crypt_len, rxb);
551 }
552
553 struct iwl_mvm_stat_data {
554 struct iwl_mvm *mvm;
555 __le32 flags;
556 __le32 mac_id;
557 u8 beacon_filter_average_energy;
558 __le32 *beacon_counter;
559 u8 *beacon_average_energy;
560 };
561
562 struct iwl_mvm_stat_data_all_macs {
563 struct iwl_mvm *mvm;
564 __le32 flags;
565 struct iwl_statistics_ntfy_per_mac *per_mac_stats;
566 };
567
iwl_mvm_update_vif_sig(struct ieee80211_vif * vif,int sig)568 static void iwl_mvm_update_vif_sig(struct ieee80211_vif *vif, int sig)
569 {
570 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
571 struct iwl_mvm *mvm = mvmvif->mvm;
572 int thold = vif->bss_conf.cqm_rssi_thold;
573 int hyst = vif->bss_conf.cqm_rssi_hyst;
574 int last_event;
575
576 if (sig == 0) {
577 IWL_DEBUG_RX(mvm, "RSSI is 0 - skip signal based decision\n");
578 return;
579 }
580
581 mvmvif->bf_data.ave_beacon_signal = sig;
582
583 /* BT Coex */
584 if (mvmvif->bf_data.bt_coex_min_thold !=
585 mvmvif->bf_data.bt_coex_max_thold) {
586 last_event = mvmvif->bf_data.last_bt_coex_event;
587 if (sig > mvmvif->bf_data.bt_coex_max_thold &&
588 (last_event <= mvmvif->bf_data.bt_coex_min_thold ||
589 last_event == 0)) {
590 mvmvif->bf_data.last_bt_coex_event = sig;
591 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex high %d\n",
592 sig);
593 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_HIGH);
594 } else if (sig < mvmvif->bf_data.bt_coex_min_thold &&
595 (last_event >= mvmvif->bf_data.bt_coex_max_thold ||
596 last_event == 0)) {
597 mvmvif->bf_data.last_bt_coex_event = sig;
598 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex low %d\n",
599 sig);
600 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_LOW);
601 }
602 }
603
604 if (!(vif->driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI))
605 return;
606
607 /* CQM Notification */
608 last_event = mvmvif->bf_data.last_cqm_event;
609 if (thold && sig < thold && (last_event == 0 ||
610 sig < last_event - hyst)) {
611 mvmvif->bf_data.last_cqm_event = sig;
612 IWL_DEBUG_RX(mvm, "cqm_iterator cqm low %d\n",
613 sig);
614 ieee80211_cqm_rssi_notify(
615 vif,
616 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
617 sig,
618 GFP_KERNEL);
619 } else if (sig > thold &&
620 (last_event == 0 || sig > last_event + hyst)) {
621 mvmvif->bf_data.last_cqm_event = sig;
622 IWL_DEBUG_RX(mvm, "cqm_iterator cqm high %d\n",
623 sig);
624 ieee80211_cqm_rssi_notify(
625 vif,
626 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
627 sig,
628 GFP_KERNEL);
629 }
630 }
631
iwl_mvm_stat_iterator(void * _data,u8 * mac,struct ieee80211_vif * vif)632 static void iwl_mvm_stat_iterator(void *_data, u8 *mac,
633 struct ieee80211_vif *vif)
634 {
635 struct iwl_mvm_stat_data *data = _data;
636 int sig = -data->beacon_filter_average_energy;
637 u16 id = le32_to_cpu(data->mac_id);
638 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
639 u16 vif_id = mvmvif->id;
640
641 /* This doesn't need the MAC ID check since it's not taking the
642 * data copied into the "data" struct, but rather the data from
643 * the notification directly.
644 */
645 mvmvif->deflink.beacon_stats.num_beacons =
646 le32_to_cpu(data->beacon_counter[vif_id]);
647 mvmvif->deflink.beacon_stats.avg_signal =
648 -data->beacon_average_energy[vif_id];
649
650 if (mvmvif->id != id)
651 return;
652
653 if (vif->type != NL80211_IFTYPE_STATION)
654 return;
655
656 /* make sure that beacon statistics don't go backwards with TCM
657 * request to clear statistics
658 */
659 if (le32_to_cpu(data->flags) & IWL_STATISTICS_REPLY_FLG_CLEAR)
660 mvmvif->deflink.beacon_stats.accu_num_beacons +=
661 mvmvif->deflink.beacon_stats.num_beacons;
662
663 iwl_mvm_update_vif_sig(vif, sig);
664 }
665
iwl_mvm_stat_iterator_all_macs(void * _data,u8 * mac,struct ieee80211_vif * vif)666 static void iwl_mvm_stat_iterator_all_macs(void *_data, u8 *mac,
667 struct ieee80211_vif *vif)
668 {
669 struct iwl_mvm_stat_data_all_macs *data = _data;
670 struct iwl_statistics_ntfy_per_mac *mac_stats;
671 int sig;
672 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
673 u16 vif_id = mvmvif->id;
674
675 if (WARN_ONCE(vif_id >= MAC_INDEX_AUX, "invalid vif id: %d", vif_id))
676 return;
677
678 if (vif->type != NL80211_IFTYPE_STATION)
679 return;
680
681 mac_stats = &data->per_mac_stats[vif_id];
682
683 mvmvif->deflink.beacon_stats.num_beacons =
684 le32_to_cpu(mac_stats->beacon_counter);
685 mvmvif->deflink.beacon_stats.avg_signal =
686 -le32_to_cpu(mac_stats->beacon_average_energy);
687
688 /* make sure that beacon statistics don't go backwards with TCM
689 * request to clear statistics
690 */
691 if (le32_to_cpu(data->flags) & IWL_STATISTICS_REPLY_FLG_CLEAR)
692 mvmvif->deflink.beacon_stats.accu_num_beacons +=
693 mvmvif->deflink.beacon_stats.num_beacons;
694
695 sig = -le32_to_cpu(mac_stats->beacon_filter_average_energy);
696 iwl_mvm_update_vif_sig(vif, sig);
697 }
698
699 static inline void
iwl_mvm_rx_stats_check_trigger(struct iwl_mvm * mvm,struct iwl_rx_packet * pkt)700 iwl_mvm_rx_stats_check_trigger(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt)
701 {
702 struct iwl_fw_dbg_trigger_tlv *trig;
703 struct iwl_fw_dbg_trigger_stats *trig_stats;
704 u32 trig_offset, trig_thold;
705
706 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_STATS);
707 if (!trig)
708 return;
709
710 trig_stats = (void *)trig->data;
711
712 trig_offset = le32_to_cpu(trig_stats->stop_offset);
713 trig_thold = le32_to_cpu(trig_stats->stop_threshold);
714
715 if (WARN_ON_ONCE(trig_offset >= iwl_rx_packet_payload_len(pkt)))
716 return;
717
718 if (le32_to_cpup((__le32 *) (pkt->data + trig_offset)) < trig_thold)
719 return;
720
721 #if defined(__linux__)
722 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, NULL);
723 #elif defined(__FreeBSD__)
724 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, "");
725 #endif
726 }
727
iwl_mvm_stats_energy_iter(void * _data,struct ieee80211_sta * sta)728 static void iwl_mvm_stats_energy_iter(void *_data,
729 struct ieee80211_sta *sta)
730 {
731 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
732 u8 *energy = _data;
733 u32 sta_id = mvmsta->deflink.sta_id;
734
735 if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT_MAX, "sta_id %d >= %d",
736 sta_id, IWL_MVM_STATION_COUNT_MAX))
737 return;
738
739 if (energy[sta_id])
740 mvmsta->deflink.avg_energy = energy[sta_id];
741
742 }
743
744 static void
iwl_mvm_update_tcm_from_stats(struct iwl_mvm * mvm,__le32 * air_time_le,__le32 * rx_bytes_le)745 iwl_mvm_update_tcm_from_stats(struct iwl_mvm *mvm, __le32 *air_time_le,
746 __le32 *rx_bytes_le)
747 {
748 int i;
749
750 spin_lock(&mvm->tcm.lock);
751 for (i = 0; i < NUM_MAC_INDEX_DRIVER; i++) {
752 struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[i];
753 u32 rx_bytes = le32_to_cpu(rx_bytes_le[i]);
754 u32 airtime = le32_to_cpu(air_time_le[i]);
755
756 mdata->rx.airtime += airtime;
757 mdata->uapsd_nonagg_detect.rx_bytes += rx_bytes;
758 if (airtime) {
759 /* re-init every time to store rate from FW */
760 ewma_rate_init(&mdata->uapsd_nonagg_detect.rate);
761 ewma_rate_add(&mdata->uapsd_nonagg_detect.rate,
762 rx_bytes * 8 / airtime);
763 }
764 }
765 spin_unlock(&mvm->tcm.lock);
766 }
767
768 static void
iwl_mvm_stats_ver_15(struct iwl_mvm * mvm,struct iwl_statistics_operational_ntfy * stats)769 iwl_mvm_stats_ver_15(struct iwl_mvm *mvm,
770 struct iwl_statistics_operational_ntfy *stats)
771 {
772 struct iwl_mvm_stat_data_all_macs data = {
773 .mvm = mvm,
774 .flags = stats->flags,
775 .per_mac_stats = stats->per_mac_stats,
776 };
777
778 ieee80211_iterate_active_interfaces(mvm->hw,
779 IEEE80211_IFACE_ITER_NORMAL,
780 iwl_mvm_stat_iterator_all_macs,
781 &data);
782 }
783
784 static void
iwl_mvm_stats_ver_14(struct iwl_mvm * mvm,struct iwl_statistics_operational_ntfy_ver_14 * stats)785 iwl_mvm_stats_ver_14(struct iwl_mvm *mvm,
786 struct iwl_statistics_operational_ntfy_ver_14 *stats)
787 {
788 struct iwl_mvm_stat_data data = {
789 .mvm = mvm,
790 };
791
792 u8 beacon_average_energy[MAC_INDEX_AUX];
793 __le32 flags;
794 int i;
795
796 flags = stats->flags;
797
798 data.mac_id = stats->mac_id;
799 data.beacon_filter_average_energy =
800 le32_to_cpu(stats->beacon_filter_average_energy);
801 data.flags = flags;
802 data.beacon_counter = stats->beacon_counter;
803
804 for (i = 0; i < ARRAY_SIZE(beacon_average_energy); i++)
805 beacon_average_energy[i] =
806 le32_to_cpu(stats->beacon_average_energy[i]);
807
808 data.beacon_average_energy = beacon_average_energy;
809
810 ieee80211_iterate_active_interfaces(mvm->hw,
811 IEEE80211_IFACE_ITER_NORMAL,
812 iwl_mvm_stat_iterator,
813 &data);
814 }
815
iwl_mvm_verify_stats_len(struct iwl_mvm * mvm,struct iwl_rx_packet * pkt,u32 expected_size)816 static bool iwl_mvm_verify_stats_len(struct iwl_mvm *mvm,
817 struct iwl_rx_packet *pkt,
818 u32 expected_size)
819 {
820 struct iwl_statistics_ntfy_hdr *hdr;
821
822 if (WARN_ONCE(iwl_rx_packet_payload_len(pkt) < expected_size,
823 "received invalid statistics size (%d)!, expected_size: %d\n",
824 iwl_rx_packet_payload_len(pkt), expected_size))
825 return false;
826
827 hdr = (void *)&pkt->data;
828
829 if (WARN_ONCE((hdr->type & IWL_STATISTICS_TYPE_MSK) != FW_STATISTICS_OPERATIONAL ||
830 hdr->version !=
831 iwl_fw_lookup_notif_ver(mvm->fw, LEGACY_GROUP, STATISTICS_NOTIFICATION, 0),
832 "received unsupported hdr type %d, version %d\n",
833 hdr->type, hdr->version))
834 return false;
835
836 if (WARN_ONCE(le16_to_cpu(hdr->size) != expected_size,
837 "received invalid statistics size in header (%d)!, expected_size: %d\n",
838 le16_to_cpu(hdr->size), expected_size))
839 return false;
840
841 return true;
842 }
843
844 static void
iwl_mvm_handle_rx_statistics_tlv(struct iwl_mvm * mvm,struct iwl_rx_packet * pkt)845 iwl_mvm_handle_rx_statistics_tlv(struct iwl_mvm *mvm,
846 struct iwl_rx_packet *pkt)
847 {
848 u8 average_energy[IWL_MVM_STATION_COUNT_MAX];
849 __le32 air_time[MAC_INDEX_AUX];
850 __le32 rx_bytes[MAC_INDEX_AUX];
851 __le32 flags = 0;
852 int i;
853 u32 notif_ver = iwl_fw_lookup_notif_ver(mvm->fw, LEGACY_GROUP,
854 STATISTICS_NOTIFICATION, 0);
855
856 if (WARN_ONCE(notif_ver > 15,
857 "invalid statistics version id: %d\n", notif_ver))
858 return;
859
860 if (notif_ver == 14) {
861 struct iwl_statistics_operational_ntfy_ver_14 *stats =
862 (void *)pkt->data;
863
864 if (!iwl_mvm_verify_stats_len(mvm, pkt, sizeof(*stats)))
865 return;
866
867 iwl_mvm_stats_ver_14(mvm, stats);
868
869 flags = stats->flags;
870 mvm->radio_stats.rx_time = le64_to_cpu(stats->rx_time);
871 mvm->radio_stats.tx_time = le64_to_cpu(stats->tx_time);
872 mvm->radio_stats.on_time_rf = le64_to_cpu(stats->on_time_rf);
873 mvm->radio_stats.on_time_scan =
874 le64_to_cpu(stats->on_time_scan);
875
876 for (i = 0; i < ARRAY_SIZE(average_energy); i++)
877 average_energy[i] = le32_to_cpu(stats->average_energy[i]);
878
879 for (i = 0; i < ARRAY_SIZE(air_time); i++) {
880 air_time[i] = stats->air_time[i];
881 rx_bytes[i] = stats->rx_bytes[i];
882 }
883 }
884
885 if (notif_ver == 15) {
886 struct iwl_statistics_operational_ntfy *stats =
887 (void *)pkt->data;
888
889 if (!iwl_mvm_verify_stats_len(mvm, pkt, sizeof(*stats)))
890 return;
891
892 iwl_mvm_stats_ver_15(mvm, stats);
893
894 flags = stats->flags;
895 mvm->radio_stats.rx_time = le64_to_cpu(stats->rx_time);
896 mvm->radio_stats.tx_time = le64_to_cpu(stats->tx_time);
897 mvm->radio_stats.on_time_rf = le64_to_cpu(stats->on_time_rf);
898 mvm->radio_stats.on_time_scan =
899 le64_to_cpu(stats->on_time_scan);
900
901 for (i = 0; i < ARRAY_SIZE(average_energy); i++)
902 average_energy[i] =
903 le32_to_cpu(stats->per_sta_stats[i].average_energy);
904
905 for (i = 0; i < ARRAY_SIZE(air_time); i++) {
906 air_time[i] = stats->per_mac_stats[i].air_time;
907 rx_bytes[i] = stats->per_mac_stats[i].rx_bytes;
908 }
909 }
910
911 iwl_mvm_rx_stats_check_trigger(mvm, pkt);
912
913 ieee80211_iterate_stations_atomic(mvm->hw, iwl_mvm_stats_energy_iter,
914 average_energy);
915 /*
916 * Don't update in case the statistics are not cleared, since
917 * we will end up counting twice the same airtime, once in TCM
918 * request and once in statistics notification.
919 */
920 if (le32_to_cpu(flags) & IWL_STATISTICS_REPLY_FLG_CLEAR)
921 iwl_mvm_update_tcm_from_stats(mvm, air_time, rx_bytes);
922 }
923
iwl_mvm_handle_rx_statistics(struct iwl_mvm * mvm,struct iwl_rx_packet * pkt)924 void iwl_mvm_handle_rx_statistics(struct iwl_mvm *mvm,
925 struct iwl_rx_packet *pkt)
926 {
927 struct iwl_mvm_stat_data data = {
928 .mvm = mvm,
929 };
930 __le32 *bytes, *air_time, flags;
931 int expected_size;
932 u8 *energy;
933
934 /* From ver 14 and up we use TLV statistics format */
935 if (iwl_fw_lookup_notif_ver(mvm->fw, LEGACY_GROUP,
936 STATISTICS_NOTIFICATION, 0) >= 14)
937 return iwl_mvm_handle_rx_statistics_tlv(mvm, pkt);
938
939 if (!iwl_mvm_has_new_rx_stats_api(mvm)) {
940 if (iwl_mvm_has_new_rx_api(mvm))
941 expected_size = sizeof(struct iwl_notif_statistics_v11);
942 else
943 expected_size = sizeof(struct iwl_notif_statistics_v10);
944 } else {
945 expected_size = sizeof(struct iwl_notif_statistics);
946 }
947
948 if (WARN_ONCE(iwl_rx_packet_payload_len(pkt) != expected_size,
949 "received invalid statistics size (%d)!\n",
950 iwl_rx_packet_payload_len(pkt)))
951 return;
952
953 if (!iwl_mvm_has_new_rx_stats_api(mvm)) {
954 struct iwl_notif_statistics_v11 *stats = (void *)&pkt->data;
955
956 data.mac_id = stats->rx.general.mac_id;
957 data.beacon_filter_average_energy =
958 stats->general.common.beacon_filter_average_energy;
959
960 mvm->rx_stats_v3 = stats->rx;
961
962 mvm->radio_stats.rx_time =
963 le64_to_cpu(stats->general.common.rx_time);
964 mvm->radio_stats.tx_time =
965 le64_to_cpu(stats->general.common.tx_time);
966 mvm->radio_stats.on_time_rf =
967 le64_to_cpu(stats->general.common.on_time_rf);
968 mvm->radio_stats.on_time_scan =
969 le64_to_cpu(stats->general.common.on_time_scan);
970
971 data.beacon_counter = stats->general.beacon_counter;
972 data.beacon_average_energy =
973 stats->general.beacon_average_energy;
974 flags = stats->flag;
975 } else {
976 struct iwl_notif_statistics *stats = (void *)&pkt->data;
977
978 data.mac_id = stats->rx.general.mac_id;
979 data.beacon_filter_average_energy =
980 stats->general.common.beacon_filter_average_energy;
981
982 mvm->rx_stats = stats->rx;
983
984 mvm->radio_stats.rx_time =
985 le64_to_cpu(stats->general.common.rx_time);
986 mvm->radio_stats.tx_time =
987 le64_to_cpu(stats->general.common.tx_time);
988 mvm->radio_stats.on_time_rf =
989 le64_to_cpu(stats->general.common.on_time_rf);
990 mvm->radio_stats.on_time_scan =
991 le64_to_cpu(stats->general.common.on_time_scan);
992
993 data.beacon_counter = stats->general.beacon_counter;
994 data.beacon_average_energy =
995 stats->general.beacon_average_energy;
996 flags = stats->flag;
997 }
998 data.flags = flags;
999
1000 iwl_mvm_rx_stats_check_trigger(mvm, pkt);
1001
1002 ieee80211_iterate_active_interfaces(mvm->hw,
1003 IEEE80211_IFACE_ITER_NORMAL,
1004 iwl_mvm_stat_iterator,
1005 &data);
1006
1007 if (!iwl_mvm_has_new_rx_api(mvm))
1008 return;
1009
1010 if (!iwl_mvm_has_new_rx_stats_api(mvm)) {
1011 struct iwl_notif_statistics_v11 *v11 = (void *)&pkt->data;
1012
1013 energy = (void *)&v11->load_stats.avg_energy;
1014 bytes = (void *)&v11->load_stats.byte_count;
1015 air_time = (void *)&v11->load_stats.air_time;
1016 } else {
1017 struct iwl_notif_statistics *stats = (void *)&pkt->data;
1018
1019 energy = (void *)&stats->load_stats.avg_energy;
1020 bytes = (void *)&stats->load_stats.byte_count;
1021 air_time = (void *)&stats->load_stats.air_time;
1022 }
1023 ieee80211_iterate_stations_atomic(mvm->hw, iwl_mvm_stats_energy_iter,
1024 energy);
1025
1026 /*
1027 * Don't update in case the statistics are not cleared, since
1028 * we will end up counting twice the same airtime, once in TCM
1029 * request and once in statistics notification.
1030 */
1031 if (le32_to_cpu(flags) & IWL_STATISTICS_REPLY_FLG_CLEAR)
1032 iwl_mvm_update_tcm_from_stats(mvm, air_time, bytes);
1033
1034 }
1035
iwl_mvm_rx_statistics(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)1036 void iwl_mvm_rx_statistics(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1037 {
1038 iwl_mvm_handle_rx_statistics(mvm, rxb_addr(rxb));
1039 }
1040
iwl_mvm_window_status_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)1041 void iwl_mvm_window_status_notif(struct iwl_mvm *mvm,
1042 struct iwl_rx_cmd_buffer *rxb)
1043 {
1044 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1045 struct iwl_ba_window_status_notif *notif = (void *)pkt->data;
1046 int i;
1047
1048 BUILD_BUG_ON(ARRAY_SIZE(notif->ra_tid) != BA_WINDOW_STREAMS_MAX);
1049 BUILD_BUG_ON(ARRAY_SIZE(notif->mpdu_rx_count) != BA_WINDOW_STREAMS_MAX);
1050 BUILD_BUG_ON(ARRAY_SIZE(notif->bitmap) != BA_WINDOW_STREAMS_MAX);
1051 BUILD_BUG_ON(ARRAY_SIZE(notif->start_seq_num) != BA_WINDOW_STREAMS_MAX);
1052
1053 rcu_read_lock();
1054 for (i = 0; i < BA_WINDOW_STREAMS_MAX; i++) {
1055 struct ieee80211_sta *sta;
1056 u8 sta_id, tid;
1057 u64 bitmap;
1058 u32 ssn;
1059 u16 ratid;
1060 u16 received_mpdu;
1061
1062 ratid = le16_to_cpu(notif->ra_tid[i]);
1063 /* check that this TID is valid */
1064 if (!(ratid & BA_WINDOW_STATUS_VALID_MSK))
1065 continue;
1066
1067 received_mpdu = le16_to_cpu(notif->mpdu_rx_count[i]);
1068 if (received_mpdu == 0)
1069 continue;
1070
1071 tid = ratid & BA_WINDOW_STATUS_TID_MSK;
1072 /* get the station */
1073 sta_id = (ratid & BA_WINDOW_STATUS_STA_ID_MSK)
1074 >> BA_WINDOW_STATUS_STA_ID_POS;
1075 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1076 if (IS_ERR_OR_NULL(sta))
1077 continue;
1078 bitmap = le64_to_cpu(notif->bitmap[i]);
1079 ssn = le32_to_cpu(notif->start_seq_num[i]);
1080
1081 /* update mac80211 with the bitmap for the reordering buffer */
1082 ieee80211_mark_rx_ba_filtered_frames(sta, tid, ssn, bitmap,
1083 received_mpdu);
1084 }
1085 rcu_read_unlock();
1086 }
1087