1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3 * Copyright (C) 2012-2014, 2018-2021 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 = (void *)hdr + hdrlen -
87 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 (!mvm->monitor_on)
193 IWL_ERR(mvm, "Unhandled alg: 0x%x\n", rx_pkt_status);
194 }
195
196 return 0;
197 }
198
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)199 static 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 ac = tid_to_mac80211_ac[ieee80211_get_tid(hdr)];
218
219 mvmsta = iwl_mvm_sta_from_mac80211(sta);
220 mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
221
222 if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD))
223 schedule_delayed_work(&mvm->tcm.work, 0);
224 mdata = &mvm->tcm.data[mac];
225 mdata->rx.pkts[ac]++;
226
227 /* count the airtime only once for each ampdu */
228 if (mdata->rx.last_ampdu_ref != mvm->ampdu_ref) {
229 mdata->rx.last_ampdu_ref = mvm->ampdu_ref;
230 mdata->rx.airtime += le16_to_cpu(phy_info->frame_time);
231 }
232
233 if (!(rate_n_flags & (RATE_MCS_HT_MSK_V1 | RATE_MCS_VHT_MSK_V1)))
234 return;
235
236 mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
237
238 if (mdata->opened_rx_ba_sessions ||
239 mdata->uapsd_nonagg_detect.detected ||
240 (!mvmvif->queue_params[IEEE80211_AC_VO].uapsd &&
241 !mvmvif->queue_params[IEEE80211_AC_VI].uapsd &&
242 !mvmvif->queue_params[IEEE80211_AC_BE].uapsd &&
243 !mvmvif->queue_params[IEEE80211_AC_BK].uapsd) ||
244 mvmsta->sta_id != mvmvif->ap_sta_id)
245 return;
246
247 if (rate_n_flags & RATE_MCS_HT_MSK_V1) {
248 thr = thresh_tpt[rate_n_flags & RATE_HT_MCS_RATE_CODE_MSK_V1];
249 thr *= 1 + ((rate_n_flags & RATE_HT_MCS_NSS_MSK_V1) >>
250 RATE_HT_MCS_NSS_POS_V1);
251 } else {
252 if (WARN_ON((rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK) >=
253 ARRAY_SIZE(thresh_tpt)))
254 return;
255 thr = thresh_tpt[rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK];
256 thr *= 1 + ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
257 RATE_VHT_MCS_NSS_POS);
258 }
259
260 thr <<= ((rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK_V1) >>
261 RATE_MCS_CHAN_WIDTH_POS);
262
263 mdata->uapsd_nonagg_detect.rx_bytes += len;
264 ewma_rate_add(&mdata->uapsd_nonagg_detect.rate, thr);
265 }
266
iwl_mvm_rx_csum(struct ieee80211_sta * sta,struct sk_buff * skb,u32 status)267 static void iwl_mvm_rx_csum(struct ieee80211_sta *sta,
268 struct sk_buff *skb,
269 u32 status)
270 {
271 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
272 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
273
274 if (mvmvif->features & NETIF_F_RXCSUM &&
275 status & RX_MPDU_RES_STATUS_CSUM_DONE &&
276 status & RX_MPDU_RES_STATUS_CSUM_OK)
277 skb->ip_summed = CHECKSUM_UNNECESSARY;
278 }
279
280 /*
281 * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler
282 *
283 * Handles the actual data of the Rx packet from the fw
284 */
iwl_mvm_rx_rx_mpdu(struct iwl_mvm * mvm,struct napi_struct * napi,struct iwl_rx_cmd_buffer * rxb)285 void iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct napi_struct *napi,
286 struct iwl_rx_cmd_buffer *rxb)
287 {
288 struct ieee80211_hdr *hdr;
289 struct ieee80211_rx_status *rx_status;
290 struct iwl_rx_packet *pkt = rxb_addr(rxb);
291 struct iwl_rx_phy_info *phy_info;
292 struct iwl_rx_mpdu_res_start *rx_res;
293 struct ieee80211_sta *sta = NULL;
294 struct sk_buff *skb;
295 u32 len, pkt_len = iwl_rx_packet_payload_len(pkt);
296 u32 rate_n_flags;
297 u32 rx_pkt_status;
298 u8 crypt_len = 0;
299
300 if (unlikely(pkt_len < sizeof(*rx_res))) {
301 IWL_DEBUG_DROP(mvm, "Bad REPLY_RX_MPDU_CMD size\n");
302 return;
303 }
304
305 phy_info = &mvm->last_phy_info;
306 rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data;
307 hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res));
308 len = le16_to_cpu(rx_res->byte_count);
309
310 if (unlikely(len + sizeof(*rx_res) + sizeof(__le32) > pkt_len)) {
311 IWL_DEBUG_DROP(mvm, "FW lied about packet len\n");
312 return;
313 }
314
315 rx_pkt_status = get_unaligned_le32((__le32 *)
316 (pkt->data + sizeof(*rx_res) + len));
317
318 /* Dont use dev_alloc_skb(), we'll have enough headroom once
319 * ieee80211_hdr pulled.
320 */
321 skb = alloc_skb(128, GFP_ATOMIC);
322 if (!skb) {
323 IWL_ERR(mvm, "alloc_skb failed\n");
324 return;
325 }
326
327 rx_status = IEEE80211_SKB_RXCB(skb);
328
329 /*
330 * drop the packet if it has failed being decrypted by HW
331 */
332 if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, rx_status, rx_pkt_status,
333 &crypt_len)) {
334 IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n",
335 rx_pkt_status);
336 kfree_skb(skb);
337 return;
338 }
339
340 /*
341 * Keep packets with CRC errors (and with overrun) for monitor mode
342 * (otherwise the firmware discards them) but mark them as bad.
343 */
344 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) ||
345 !(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) {
346 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status);
347 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
348 }
349
350 /* This will be used in several places later */
351 rate_n_flags = le32_to_cpu(phy_info->rate_n_flags);
352
353 /* rx_status carries information about the packet to mac80211 */
354 rx_status->mactime = le64_to_cpu(phy_info->timestamp);
355 rx_status->device_timestamp = le32_to_cpu(phy_info->system_timestamp);
356 rx_status->band =
357 (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ?
358 NL80211_BAND_2GHZ : NL80211_BAND_5GHZ;
359 rx_status->freq =
360 ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel),
361 rx_status->band);
362
363 /* TSF as indicated by the firmware is at INA time */
364 rx_status->flag |= RX_FLAG_MACTIME_PLCP_START;
365
366 iwl_mvm_get_signal_strength(mvm, phy_info, rx_status);
367
368 IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status->signal,
369 (unsigned long long)rx_status->mactime);
370
371 rcu_read_lock();
372 if (rx_pkt_status & RX_MPDU_RES_STATUS_SRC_STA_FOUND) {
373 u32 id = rx_pkt_status & RX_MPDU_RES_STATUS_STA_ID_MSK;
374
375 id >>= RX_MDPU_RES_STATUS_STA_ID_SHIFT;
376
377 if (!WARN_ON_ONCE(id >= mvm->fw->ucode_capa.num_stations)) {
378 sta = rcu_dereference(mvm->fw_id_to_mac_id[id]);
379 if (IS_ERR(sta))
380 sta = NULL;
381 }
382 } else if (!is_multicast_ether_addr(hdr->addr2)) {
383 /* This is fine since we prevent two stations with the same
384 * address from being added.
385 */
386 sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL);
387 }
388
389 if (sta) {
390 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
391 struct ieee80211_vif *tx_blocked_vif =
392 rcu_dereference(mvm->csa_tx_blocked_vif);
393 struct iwl_fw_dbg_trigger_tlv *trig;
394 struct ieee80211_vif *vif = mvmsta->vif;
395
396 /* We have tx blocked stations (with CS bit). If we heard
397 * frames from a blocked station on a new channel we can
398 * TX to it again.
399 */
400 if (unlikely(tx_blocked_vif) && vif == tx_blocked_vif) {
401 struct iwl_mvm_vif *mvmvif =
402 iwl_mvm_vif_from_mac80211(tx_blocked_vif);
403
404 if (mvmvif->csa_target_freq == rx_status->freq)
405 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta,
406 false);
407 }
408
409 rs_update_last_rssi(mvm, mvmsta, rx_status);
410
411 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt,
412 ieee80211_vif_to_wdev(vif),
413 FW_DBG_TRIGGER_RSSI);
414
415 if (trig && ieee80211_is_beacon(hdr->frame_control)) {
416 struct iwl_fw_dbg_trigger_low_rssi *rssi_trig;
417 s32 rssi;
418
419 rssi_trig = (void *)trig->data;
420 rssi = le32_to_cpu(rssi_trig->rssi);
421
422 if (rx_status->signal < rssi)
423 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
424 NULL);
425 }
426
427 if (!mvm->tcm.paused && len >= sizeof(*hdr) &&
428 !is_multicast_ether_addr(hdr->addr1) &&
429 ieee80211_is_data(hdr->frame_control))
430 iwl_mvm_rx_handle_tcm(mvm, sta, hdr, len, phy_info,
431 rate_n_flags);
432
433 if (ieee80211_is_data(hdr->frame_control))
434 iwl_mvm_rx_csum(sta, skb, rx_pkt_status);
435 }
436 rcu_read_unlock();
437
438 /* set the preamble flag if appropriate */
439 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE))
440 rx_status->enc_flags |= RX_ENC_FLAG_SHORTPRE;
441
442 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) {
443 /*
444 * We know which subframes of an A-MPDU belong
445 * together since we get a single PHY response
446 * from the firmware for all of them
447 */
448 rx_status->flag |= RX_FLAG_AMPDU_DETAILS;
449 rx_status->ampdu_reference = mvm->ampdu_ref;
450 }
451
452 /* Set up the HT phy flags */
453 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK_V1) {
454 case RATE_MCS_CHAN_WIDTH_20:
455 break;
456 case RATE_MCS_CHAN_WIDTH_40:
457 rx_status->bw = RATE_INFO_BW_40;
458 break;
459 case RATE_MCS_CHAN_WIDTH_80:
460 rx_status->bw = RATE_INFO_BW_80;
461 break;
462 case RATE_MCS_CHAN_WIDTH_160:
463 rx_status->bw = RATE_INFO_BW_160;
464 break;
465 }
466 if (!(rate_n_flags & RATE_MCS_CCK_MSK_V1) &&
467 rate_n_flags & RATE_MCS_SGI_MSK_V1)
468 rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
469 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
470 rx_status->enc_flags |= RX_ENC_FLAG_HT_GF;
471 if (rate_n_flags & RATE_MCS_LDPC_MSK_V1)
472 rx_status->enc_flags |= RX_ENC_FLAG_LDPC;
473 if (rate_n_flags & RATE_MCS_HT_MSK_V1) {
474 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >>
475 RATE_MCS_STBC_POS;
476 rx_status->encoding = RX_ENC_HT;
477 rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK_V1;
478 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
479 } else if (rate_n_flags & RATE_MCS_VHT_MSK_V1) {
480 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >>
481 RATE_MCS_STBC_POS;
482 rx_status->nss =
483 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
484 RATE_VHT_MCS_NSS_POS) + 1;
485 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;
486 rx_status->encoding = RX_ENC_VHT;
487 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
488 if (rate_n_flags & RATE_MCS_BF_MSK)
489 rx_status->enc_flags |= RX_ENC_FLAG_BF;
490 } else {
491 int rate = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
492 rx_status->band);
493
494 if (WARN(rate < 0 || rate > 0xFF,
495 "Invalid rate flags 0x%x, band %d,\n",
496 rate_n_flags, rx_status->band)) {
497 kfree_skb(skb);
498 return;
499 }
500 rx_status->rate_idx = rate;
501 }
502
503 #ifdef CONFIG_IWLWIFI_DEBUGFS
504 iwl_mvm_update_frame_stats(mvm, rate_n_flags,
505 rx_status->flag & RX_FLAG_AMPDU_DETAILS);
506 #endif
507
508 if (unlikely((ieee80211_is_beacon(hdr->frame_control) ||
509 ieee80211_is_probe_resp(hdr->frame_control)) &&
510 mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED))
511 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND;
512
513 if (unlikely(ieee80211_is_beacon(hdr->frame_control) ||
514 ieee80211_is_probe_resp(hdr->frame_control)))
515 rx_status->boottime_ns = ktime_get_boottime_ns();
516
517 iwl_mvm_pass_packet_to_mac80211(mvm, sta, napi, skb, hdr, len,
518 crypt_len, rxb);
519 }
520
521 struct iwl_mvm_stat_data {
522 struct iwl_mvm *mvm;
523 __le32 flags;
524 __le32 mac_id;
525 u8 beacon_filter_average_energy;
526 __le32 *beacon_counter;
527 u8 *beacon_average_energy;
528 };
529
iwl_mvm_stat_iterator(void * _data,u8 * mac,struct ieee80211_vif * vif)530 static void iwl_mvm_stat_iterator(void *_data, u8 *mac,
531 struct ieee80211_vif *vif)
532 {
533 struct iwl_mvm_stat_data *data = _data;
534 struct iwl_mvm *mvm = data->mvm;
535 int sig = -data->beacon_filter_average_energy;
536 int last_event;
537 int thold = vif->bss_conf.cqm_rssi_thold;
538 int hyst = vif->bss_conf.cqm_rssi_hyst;
539 u16 id = le32_to_cpu(data->mac_id);
540 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
541 u16 vif_id = mvmvif->id;
542
543 /* This doesn't need the MAC ID check since it's not taking the
544 * data copied into the "data" struct, but rather the data from
545 * the notification directly.
546 */
547 mvmvif->beacon_stats.num_beacons =
548 le32_to_cpu(data->beacon_counter[vif_id]);
549 mvmvif->beacon_stats.avg_signal =
550 -data->beacon_average_energy[vif_id];
551
552 /* make sure that beacon statistics don't go backwards with TCM
553 * request to clear statistics
554 */
555 if (le32_to_cpu(data->flags) & IWL_STATISTICS_REPLY_FLG_CLEAR)
556 mvmvif->beacon_stats.accu_num_beacons +=
557 mvmvif->beacon_stats.num_beacons;
558
559 if (mvmvif->id != id)
560 return;
561
562 if (vif->type != NL80211_IFTYPE_STATION)
563 return;
564
565 if (sig == 0) {
566 IWL_DEBUG_RX(mvm, "RSSI is 0 - skip signal based decision\n");
567 return;
568 }
569
570 mvmvif->bf_data.ave_beacon_signal = sig;
571
572 /* BT Coex */
573 if (mvmvif->bf_data.bt_coex_min_thold !=
574 mvmvif->bf_data.bt_coex_max_thold) {
575 last_event = mvmvif->bf_data.last_bt_coex_event;
576 if (sig > mvmvif->bf_data.bt_coex_max_thold &&
577 (last_event <= mvmvif->bf_data.bt_coex_min_thold ||
578 last_event == 0)) {
579 mvmvif->bf_data.last_bt_coex_event = sig;
580 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex high %d\n",
581 sig);
582 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_HIGH);
583 } else if (sig < mvmvif->bf_data.bt_coex_min_thold &&
584 (last_event >= mvmvif->bf_data.bt_coex_max_thold ||
585 last_event == 0)) {
586 mvmvif->bf_data.last_bt_coex_event = sig;
587 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex low %d\n",
588 sig);
589 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_LOW);
590 }
591 }
592
593 if (!(vif->driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI))
594 return;
595
596 /* CQM Notification */
597 last_event = mvmvif->bf_data.last_cqm_event;
598 if (thold && sig < thold && (last_event == 0 ||
599 sig < last_event - hyst)) {
600 mvmvif->bf_data.last_cqm_event = sig;
601 IWL_DEBUG_RX(mvm, "cqm_iterator cqm low %d\n",
602 sig);
603 ieee80211_cqm_rssi_notify(
604 vif,
605 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
606 sig,
607 GFP_KERNEL);
608 } else if (sig > thold &&
609 (last_event == 0 || sig > last_event + hyst)) {
610 mvmvif->bf_data.last_cqm_event = sig;
611 IWL_DEBUG_RX(mvm, "cqm_iterator cqm high %d\n",
612 sig);
613 ieee80211_cqm_rssi_notify(
614 vif,
615 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
616 sig,
617 GFP_KERNEL);
618 }
619 }
620
621 static inline void
iwl_mvm_rx_stats_check_trigger(struct iwl_mvm * mvm,struct iwl_rx_packet * pkt)622 iwl_mvm_rx_stats_check_trigger(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt)
623 {
624 struct iwl_fw_dbg_trigger_tlv *trig;
625 struct iwl_fw_dbg_trigger_stats *trig_stats;
626 u32 trig_offset, trig_thold;
627
628 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_STATS);
629 if (!trig)
630 return;
631
632 trig_stats = (void *)trig->data;
633
634 trig_offset = le32_to_cpu(trig_stats->stop_offset);
635 trig_thold = le32_to_cpu(trig_stats->stop_threshold);
636
637 if (WARN_ON_ONCE(trig_offset >= iwl_rx_packet_payload_len(pkt)))
638 return;
639
640 if (le32_to_cpup((__le32 *) (pkt->data + trig_offset)) < trig_thold)
641 return;
642
643 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, NULL);
644 }
645
iwl_mvm_stats_energy_iter(void * _data,struct ieee80211_sta * sta)646 static void iwl_mvm_stats_energy_iter(void *_data,
647 struct ieee80211_sta *sta)
648 {
649 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
650 u8 *energy = _data;
651 u32 sta_id = mvmsta->sta_id;
652
653 if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT_MAX, "sta_id %d >= %d",
654 sta_id, IWL_MVM_STATION_COUNT_MAX))
655 return;
656
657 if (energy[sta_id])
658 mvmsta->avg_energy = energy[sta_id];
659
660 }
661
662 static void
iwl_mvm_update_tcm_from_stats(struct iwl_mvm * mvm,__le32 * air_time_le,__le32 * rx_bytes_le)663 iwl_mvm_update_tcm_from_stats(struct iwl_mvm *mvm, __le32 *air_time_le,
664 __le32 *rx_bytes_le)
665 {
666 int i;
667
668 spin_lock(&mvm->tcm.lock);
669 for (i = 0; i < NUM_MAC_INDEX_DRIVER; i++) {
670 struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[i];
671 u32 rx_bytes = le32_to_cpu(rx_bytes_le[i]);
672 u32 airtime = le32_to_cpu(air_time_le[i]);
673
674 mdata->rx.airtime += airtime;
675 mdata->uapsd_nonagg_detect.rx_bytes += rx_bytes;
676 if (airtime) {
677 /* re-init every time to store rate from FW */
678 ewma_rate_init(&mdata->uapsd_nonagg_detect.rate);
679 ewma_rate_add(&mdata->uapsd_nonagg_detect.rate,
680 rx_bytes * 8 / airtime);
681 }
682 }
683 spin_unlock(&mvm->tcm.lock);
684 }
685
686 static void
iwl_mvm_handle_rx_statistics_tlv(struct iwl_mvm * mvm,struct iwl_rx_packet * pkt)687 iwl_mvm_handle_rx_statistics_tlv(struct iwl_mvm *mvm,
688 struct iwl_rx_packet *pkt)
689 {
690 struct iwl_mvm_stat_data data = {
691 .mvm = mvm,
692 };
693 u8 beacon_average_energy[MAC_INDEX_AUX];
694 u8 average_energy[IWL_MVM_STATION_COUNT_MAX];
695 struct iwl_statistics_operational_ntfy *stats;
696 int expected_size;
697 __le32 flags;
698 int i;
699
700 expected_size = sizeof(*stats);
701 if (WARN_ONCE(iwl_rx_packet_payload_len(pkt) < expected_size,
702 "received invalid statistics size (%d)!, expected_size: %d\n",
703 iwl_rx_packet_payload_len(pkt), expected_size))
704 return;
705
706 stats = (void *)&pkt->data;
707
708 if (WARN_ONCE(stats->hdr.type != FW_STATISTICS_OPERATIONAL ||
709 stats->hdr.version !=
710 iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, STATISTICS_CMD, 0),
711 "received unsupported hdr type %d, version %d\n",
712 stats->hdr.type, stats->hdr.version))
713 return;
714
715 flags = stats->flags;
716 mvm->radio_stats.rx_time = le64_to_cpu(stats->rx_time);
717 mvm->radio_stats.tx_time = le64_to_cpu(stats->tx_time);
718 mvm->radio_stats.on_time_rf = le64_to_cpu(stats->on_time_rf);
719 mvm->radio_stats.on_time_scan = le64_to_cpu(stats->on_time_scan);
720
721 iwl_mvm_rx_stats_check_trigger(mvm, pkt);
722
723 data.mac_id = stats->mac_id;
724 data.beacon_filter_average_energy =
725 le32_to_cpu(stats->beacon_filter_average_energy);
726 data.flags = flags;
727 data.beacon_counter = stats->beacon_counter;
728 for (i = 0; i < ARRAY_SIZE(beacon_average_energy); i++)
729 beacon_average_energy[i] =
730 le32_to_cpu(stats->beacon_average_energy[i]);
731
732 data.beacon_average_energy = beacon_average_energy;
733
734 ieee80211_iterate_active_interfaces(mvm->hw,
735 IEEE80211_IFACE_ITER_NORMAL,
736 iwl_mvm_stat_iterator,
737 &data);
738
739 for (i = 0; i < ARRAY_SIZE(average_energy); i++)
740 average_energy[i] = le32_to_cpu(stats->average_energy[i]);
741 ieee80211_iterate_stations_atomic(mvm->hw, iwl_mvm_stats_energy_iter,
742 average_energy);
743 /*
744 * Don't update in case the statistics are not cleared, since
745 * we will end up counting twice the same airtime, once in TCM
746 * request and once in statistics notification.
747 */
748 if (le32_to_cpu(flags) & IWL_STATISTICS_REPLY_FLG_CLEAR)
749 iwl_mvm_update_tcm_from_stats(mvm, stats->air_time,
750 stats->rx_bytes);
751 }
752
iwl_mvm_handle_rx_statistics(struct iwl_mvm * mvm,struct iwl_rx_packet * pkt)753 void iwl_mvm_handle_rx_statistics(struct iwl_mvm *mvm,
754 struct iwl_rx_packet *pkt)
755 {
756 struct iwl_mvm_stat_data data = {
757 .mvm = mvm,
758 };
759 __le32 *bytes, *air_time, flags;
760 int expected_size;
761 u8 *energy;
762
763 /* From ver 14 and up we use TLV statistics format */
764 if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP,
765 STATISTICS_CMD, 0) >= 14)
766 return iwl_mvm_handle_rx_statistics_tlv(mvm, pkt);
767
768 if (!iwl_mvm_has_new_rx_stats_api(mvm)) {
769 if (iwl_mvm_has_new_rx_api(mvm))
770 expected_size = sizeof(struct iwl_notif_statistics_v11);
771 else
772 expected_size = sizeof(struct iwl_notif_statistics_v10);
773 } else {
774 expected_size = sizeof(struct iwl_notif_statistics);
775 }
776
777 if (WARN_ONCE(iwl_rx_packet_payload_len(pkt) != expected_size,
778 "received invalid statistics size (%d)!\n",
779 iwl_rx_packet_payload_len(pkt)))
780 return;
781
782 if (!iwl_mvm_has_new_rx_stats_api(mvm)) {
783 struct iwl_notif_statistics_v11 *stats = (void *)&pkt->data;
784
785 data.mac_id = stats->rx.general.mac_id;
786 data.beacon_filter_average_energy =
787 stats->general.common.beacon_filter_average_energy;
788
789 mvm->rx_stats_v3 = stats->rx;
790
791 mvm->radio_stats.rx_time =
792 le64_to_cpu(stats->general.common.rx_time);
793 mvm->radio_stats.tx_time =
794 le64_to_cpu(stats->general.common.tx_time);
795 mvm->radio_stats.on_time_rf =
796 le64_to_cpu(stats->general.common.on_time_rf);
797 mvm->radio_stats.on_time_scan =
798 le64_to_cpu(stats->general.common.on_time_scan);
799
800 data.beacon_counter = stats->general.beacon_counter;
801 data.beacon_average_energy =
802 stats->general.beacon_average_energy;
803 flags = stats->flag;
804 } else {
805 struct iwl_notif_statistics *stats = (void *)&pkt->data;
806
807 data.mac_id = stats->rx.general.mac_id;
808 data.beacon_filter_average_energy =
809 stats->general.common.beacon_filter_average_energy;
810
811 mvm->rx_stats = stats->rx;
812
813 mvm->radio_stats.rx_time =
814 le64_to_cpu(stats->general.common.rx_time);
815 mvm->radio_stats.tx_time =
816 le64_to_cpu(stats->general.common.tx_time);
817 mvm->radio_stats.on_time_rf =
818 le64_to_cpu(stats->general.common.on_time_rf);
819 mvm->radio_stats.on_time_scan =
820 le64_to_cpu(stats->general.common.on_time_scan);
821
822 data.beacon_counter = stats->general.beacon_counter;
823 data.beacon_average_energy =
824 stats->general.beacon_average_energy;
825 flags = stats->flag;
826 }
827 data.flags = flags;
828
829 iwl_mvm_rx_stats_check_trigger(mvm, pkt);
830
831 ieee80211_iterate_active_interfaces(mvm->hw,
832 IEEE80211_IFACE_ITER_NORMAL,
833 iwl_mvm_stat_iterator,
834 &data);
835
836 if (!iwl_mvm_has_new_rx_api(mvm))
837 return;
838
839 if (!iwl_mvm_has_new_rx_stats_api(mvm)) {
840 struct iwl_notif_statistics_v11 *v11 = (void *)&pkt->data;
841
842 energy = (void *)&v11->load_stats.avg_energy;
843 bytes = (void *)&v11->load_stats.byte_count;
844 air_time = (void *)&v11->load_stats.air_time;
845 } else {
846 struct iwl_notif_statistics *stats = (void *)&pkt->data;
847
848 energy = (void *)&stats->load_stats.avg_energy;
849 bytes = (void *)&stats->load_stats.byte_count;
850 air_time = (void *)&stats->load_stats.air_time;
851 }
852 ieee80211_iterate_stations_atomic(mvm->hw, iwl_mvm_stats_energy_iter,
853 energy);
854
855 /*
856 * Don't update in case the statistics are not cleared, since
857 * we will end up counting twice the same airtime, once in TCM
858 * request and once in statistics notification.
859 */
860 if (le32_to_cpu(flags) & IWL_STATISTICS_REPLY_FLG_CLEAR)
861 iwl_mvm_update_tcm_from_stats(mvm, air_time, bytes);
862
863 }
864
iwl_mvm_rx_statistics(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)865 void iwl_mvm_rx_statistics(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
866 {
867 iwl_mvm_handle_rx_statistics(mvm, rxb_addr(rxb));
868 }
869
iwl_mvm_window_status_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)870 void iwl_mvm_window_status_notif(struct iwl_mvm *mvm,
871 struct iwl_rx_cmd_buffer *rxb)
872 {
873 struct iwl_rx_packet *pkt = rxb_addr(rxb);
874 struct iwl_ba_window_status_notif *notif = (void *)pkt->data;
875 int i;
876
877 BUILD_BUG_ON(ARRAY_SIZE(notif->ra_tid) != BA_WINDOW_STREAMS_MAX);
878 BUILD_BUG_ON(ARRAY_SIZE(notif->mpdu_rx_count) != BA_WINDOW_STREAMS_MAX);
879 BUILD_BUG_ON(ARRAY_SIZE(notif->bitmap) != BA_WINDOW_STREAMS_MAX);
880 BUILD_BUG_ON(ARRAY_SIZE(notif->start_seq_num) != BA_WINDOW_STREAMS_MAX);
881
882 rcu_read_lock();
883 for (i = 0; i < BA_WINDOW_STREAMS_MAX; i++) {
884 struct ieee80211_sta *sta;
885 u8 sta_id, tid;
886 u64 bitmap;
887 u32 ssn;
888 u16 ratid;
889 u16 received_mpdu;
890
891 ratid = le16_to_cpu(notif->ra_tid[i]);
892 /* check that this TID is valid */
893 if (!(ratid & BA_WINDOW_STATUS_VALID_MSK))
894 continue;
895
896 received_mpdu = le16_to_cpu(notif->mpdu_rx_count[i]);
897 if (received_mpdu == 0)
898 continue;
899
900 tid = ratid & BA_WINDOW_STATUS_TID_MSK;
901 /* get the station */
902 sta_id = (ratid & BA_WINDOW_STATUS_STA_ID_MSK)
903 >> BA_WINDOW_STATUS_STA_ID_POS;
904 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
905 if (IS_ERR_OR_NULL(sta))
906 continue;
907 bitmap = le64_to_cpu(notif->bitmap[i]);
908 ssn = le32_to_cpu(notif->start_seq_num[i]);
909
910 /* update mac80211 with the bitmap for the reordering buffer */
911 ieee80211_mark_rx_ba_filtered_frames(sta, tid, ssn, bitmap,
912 received_mpdu);
913 }
914 rcu_read_unlock();
915 }
916