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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 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#include "fw-dbg.h"
71
72/*
73 * iwl_mvm_rx_rx_phy_cmd - REPLY_RX_PHY_CMD handler
74 *
75 * Copies the phy information in mvm->last_phy_info, it will be used when the
76 * actual data will come from the fw in the next packet.
77 */
78void iwl_mvm_rx_rx_phy_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
79{
80 struct iwl_rx_packet *pkt = rxb_addr(rxb);
81
82 memcpy(&mvm->last_phy_info, pkt->data, sizeof(mvm->last_phy_info));
83 mvm->ampdu_ref++;
84
85#ifdef CONFIG_IWLWIFI_DEBUGFS
86 if (mvm->last_phy_info.phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) {
87 spin_lock(&mvm->drv_stats_lock);
88 mvm->drv_rx_stats.ampdu_count++;
89 spin_unlock(&mvm->drv_stats_lock);
90 }
91#endif
92}
93
94/*
95 * iwl_mvm_pass_packet_to_mac80211 - builds the packet for mac80211
96 *
97 * Adds the rxb to a new skb and give it to mac80211
98 */
99static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm,
100 struct napi_struct *napi,
101 struct sk_buff *skb,
102 struct ieee80211_hdr *hdr, u16 len,
103 u32 ampdu_status, u8 crypt_len,
104 struct iwl_rx_cmd_buffer *rxb)
105{
106 unsigned int hdrlen, fraglen;
107
108 /* If frame is small enough to fit in skb->head, pull it completely.
109 * If not, only pull ieee80211_hdr (including crypto if present, and
110 * an additional 8 bytes for SNAP/ethertype, see below) so that
111 * splice() or TCP coalesce are more efficient.
112 *
113 * Since, in addition, ieee80211_data_to_8023() always pull in at
114 * least 8 bytes (possibly more for mesh) we can do the same here
115 * to save the cost of doing it later. That still doesn't pull in
116 * the actual IP header since the typical case has a SNAP header.
117 * If the latter changes (there are efforts in the standards group
118 * to do so) we should revisit this and ieee80211_data_to_8023().
119 */
120 hdrlen = (len <= skb_tailroom(skb)) ? len :
121 sizeof(*hdr) + crypt_len + 8;
122
123 memcpy(skb_put(skb, hdrlen), hdr, hdrlen);
124 fraglen = len - hdrlen;
125
126 if (fraglen) {
127 int offset = (void *)hdr + hdrlen -
128 rxb_addr(rxb) + rxb_offset(rxb);
129
130 skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset,
131 fraglen, rxb->truesize);
132 }
133
134 ieee80211_rx_napi(mvm->hw, skb, napi);
135}
136
137/*
138 * iwl_mvm_get_signal_strength - use new rx PHY INFO API
139 * values are reported by the fw as positive values - need to negate
140 * to obtain their dBM. Account for missing antennas by replacing 0
141 * values by -256dBm: practically 0 power and a non-feasible 8 bit value.
142 */
143static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm,
144 struct iwl_rx_phy_info *phy_info,
145 struct ieee80211_rx_status *rx_status)
146{
147 int energy_a, energy_b, energy_c, max_energy;
148 u32 val;
149
150 val =
151 le32_to_cpu(phy_info->non_cfg_phy[IWL_RX_INFO_ENERGY_ANT_ABC_IDX]);
152 energy_a = (val & IWL_RX_INFO_ENERGY_ANT_A_MSK) >>
153 IWL_RX_INFO_ENERGY_ANT_A_POS;
154 energy_a = energy_a ? -energy_a : S8_MIN;
155 energy_b = (val & IWL_RX_INFO_ENERGY_ANT_B_MSK) >>
156 IWL_RX_INFO_ENERGY_ANT_B_POS;
157 energy_b = energy_b ? -energy_b : S8_MIN;
158 energy_c = (val & IWL_RX_INFO_ENERGY_ANT_C_MSK) >>
159 IWL_RX_INFO_ENERGY_ANT_C_POS;
160 energy_c = energy_c ? -energy_c : S8_MIN;
161 max_energy = max(energy_a, energy_b);
162 max_energy = max(max_energy, energy_c);
163
164 IWL_DEBUG_STATS(mvm, "energy In A %d B %d C %d , and max %d\n",
165 energy_a, energy_b, energy_c, max_energy);
166
167 rx_status->signal = max_energy;
168 rx_status->chains = (le16_to_cpu(phy_info->phy_flags) &
169 RX_RES_PHY_FLAGS_ANTENNA)
170 >> RX_RES_PHY_FLAGS_ANTENNA_POS;
171 rx_status->chain_signal[0] = energy_a;
172 rx_status->chain_signal[1] = energy_b;
173 rx_status->chain_signal[2] = energy_c;
174}
175
176/*
177 * iwl_mvm_set_mac80211_rx_flag - translate fw status to mac80211 format
178 * @mvm: the mvm object
179 * @hdr: 80211 header
180 * @stats: status in mac80211's format
181 * @rx_pkt_status: status coming from fw
182 *
183 * returns non 0 value if the packet should be dropped
184 */
185static u32 iwl_mvm_set_mac80211_rx_flag(struct iwl_mvm *mvm,
186 struct ieee80211_hdr *hdr,
187 struct ieee80211_rx_status *stats,
188 u32 rx_pkt_status,
189 u8 *crypt_len)
190{
191 if (!ieee80211_has_protected(hdr->frame_control) ||
192 (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
193 RX_MPDU_RES_STATUS_SEC_NO_ENC)
194 return 0;
195
196 /* packet was encrypted with unknown alg */
197 if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
198 RX_MPDU_RES_STATUS_SEC_ENC_ERR)
199 return 0;
200
201 switch (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) {
202 case RX_MPDU_RES_STATUS_SEC_CCM_ENC:
203 /* alg is CCM: check MIC only */
204 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK))
205 return -1;
206
207 stats->flag |= RX_FLAG_DECRYPTED;
208 *crypt_len = IEEE80211_CCMP_HDR_LEN;
209 return 0;
210
211 case RX_MPDU_RES_STATUS_SEC_TKIP_ENC:
212 /* Don't drop the frame and decrypt it in SW */
213 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_TTAK_OK))
214 return 0;
215 *crypt_len = IEEE80211_TKIP_IV_LEN;
216 /* fall through if TTAK OK */
217
218 case RX_MPDU_RES_STATUS_SEC_WEP_ENC:
219 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_ICV_OK))
220 return -1;
221
222 stats->flag |= RX_FLAG_DECRYPTED;
223 if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
224 RX_MPDU_RES_STATUS_SEC_WEP_ENC)
225 *crypt_len = IEEE80211_WEP_IV_LEN;
226 return 0;
227
228 case RX_MPDU_RES_STATUS_SEC_EXT_ENC:
229 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK))
230 return -1;
231 stats->flag |= RX_FLAG_DECRYPTED;
232 return 0;
233
234 default:
235 IWL_ERR(mvm, "Unhandled alg: 0x%x\n", rx_pkt_status);
236 }
237
238 return 0;
239}
240
241static void iwl_mvm_rx_csum(struct ieee80211_sta *sta,
242 struct sk_buff *skb,
243 u32 status)
244{
245 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
246 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
247
248 if (mvmvif->features & NETIF_F_RXCSUM &&
249 status & RX_MPDU_RES_STATUS_CSUM_DONE &&
250 status & RX_MPDU_RES_STATUS_CSUM_OK)
251 skb->ip_summed = CHECKSUM_UNNECESSARY;
252}
253
254/*
255 * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler
256 *
257 * Handles the actual data of the Rx packet from the fw
258 */
259void iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct napi_struct *napi,
260 struct iwl_rx_cmd_buffer *rxb)
261{
262 struct ieee80211_hdr *hdr;
263 struct ieee80211_rx_status *rx_status;
264 struct iwl_rx_packet *pkt = rxb_addr(rxb);
265 struct iwl_rx_phy_info *phy_info;
266 struct iwl_rx_mpdu_res_start *rx_res;
267 struct ieee80211_sta *sta = NULL;
268 struct sk_buff *skb;
269 u32 len;
270 u32 ampdu_status;
271 u32 rate_n_flags;
272 u32 rx_pkt_status;
273 u8 crypt_len = 0;
274
275 phy_info = &mvm->last_phy_info;
276 rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data;
277 hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res));
278 len = le16_to_cpu(rx_res->byte_count);
279 rx_pkt_status = le32_to_cpup((__le32 *)
280 (pkt->data + sizeof(*rx_res) + len));
281
282 /* Dont use dev_alloc_skb(), we'll have enough headroom once
283 * ieee80211_hdr pulled.
284 */
285 skb = alloc_skb(128, GFP_ATOMIC);
286 if (!skb) {
287 IWL_ERR(mvm, "alloc_skb failed\n");
288 return;
289 }
290
291 rx_status = IEEE80211_SKB_RXCB(skb);
292
293 /*
294 * drop the packet if it has failed being decrypted by HW
295 */
296 if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, rx_status, rx_pkt_status,
297 &crypt_len)) {
298 IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n",
299 rx_pkt_status);
300 kfree_skb(skb);
301 return;
302 }
303
304 /*
305 * Keep packets with CRC errors (and with overrun) for monitor mode
306 * (otherwise the firmware discards them) but mark them as bad.
307 */
308 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) ||
309 !(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) {
310 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status);
311 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
312 }
313
314 /* This will be used in several places later */
315 rate_n_flags = le32_to_cpu(phy_info->rate_n_flags);
316
317 /* rx_status carries information about the packet to mac80211 */
318 rx_status->mactime = le64_to_cpu(phy_info->timestamp);
319 rx_status->device_timestamp = le32_to_cpu(phy_info->system_timestamp);
320 rx_status->band =
321 (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ?
322 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
323 rx_status->freq =
324 ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel),
325 rx_status->band);
326
327 /* TSF as indicated by the firmware is at INA time */
328 rx_status->flag |= RX_FLAG_MACTIME_PLCP_START;
329
330 iwl_mvm_get_signal_strength(mvm, phy_info, rx_status);
331
332 IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status->signal,
333 (unsigned long long)rx_status->mactime);
334
335 rcu_read_lock();
336 if (rx_pkt_status & RX_MPDU_RES_STATUS_SRC_STA_FOUND) {
337 u32 id = rx_pkt_status & RX_MPDU_RES_STATUS_STA_ID_MSK;
338
339 id >>= RX_MDPU_RES_STATUS_STA_ID_SHIFT;
340
341 if (!WARN_ON_ONCE(id >= IWL_MVM_STATION_COUNT)) {
342 sta = rcu_dereference(mvm->fw_id_to_mac_id[id]);
343 if (IS_ERR(sta))
344 sta = NULL;
345 }
346 } else if (!is_multicast_ether_addr(hdr->addr2)) {
347 /* This is fine since we prevent two stations with the same
348 * address from being added.
349 */
350 sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL);
351 }
352
353 if (sta) {
354 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
355
356 /* We have tx blocked stations (with CS bit). If we heard
357 * frames from a blocked station on a new channel we can
358 * TX to it again.
359 */
360 if (unlikely(mvm->csa_tx_block_bcn_timeout))
361 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, false);
362
363 rs_update_last_rssi(mvm, &mvmsta->lq_sta, rx_status);
364
365 if (iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_RSSI) &&
366 ieee80211_is_beacon(hdr->frame_control)) {
367 struct iwl_fw_dbg_trigger_tlv *trig;
368 struct iwl_fw_dbg_trigger_low_rssi *rssi_trig;
369 bool trig_check;
370 s32 rssi;
371
372 trig = iwl_fw_dbg_get_trigger(mvm->fw,
373 FW_DBG_TRIGGER_RSSI);
374 rssi_trig = (void *)trig->data;
375 rssi = le32_to_cpu(rssi_trig->rssi);
376
377 trig_check =
378 iwl_fw_dbg_trigger_check_stop(mvm, mvmsta->vif,
379 trig);
380 if (trig_check && rx_status->signal < rssi)
381 iwl_mvm_fw_dbg_collect_trig(mvm, trig, NULL);
382 }
383
384 if (ieee80211_is_data(hdr->frame_control))
385 iwl_mvm_rx_csum(sta, skb, rx_pkt_status);
386 }
387 rcu_read_unlock();
388
389 /* set the preamble flag if appropriate */
390 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE))
391 rx_status->flag |= RX_FLAG_SHORTPRE;
392
393 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) {
394 /*
395 * We know which subframes of an A-MPDU belong
396 * together since we get a single PHY response
397 * from the firmware for all of them
398 */
399 rx_status->flag |= RX_FLAG_AMPDU_DETAILS;
400 rx_status->ampdu_reference = mvm->ampdu_ref;
401 }
402
403 /* Set up the HT phy flags */
404 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
405 case RATE_MCS_CHAN_WIDTH_20:
406 break;
407 case RATE_MCS_CHAN_WIDTH_40:
408 rx_status->flag |= RX_FLAG_40MHZ;
409 break;
410 case RATE_MCS_CHAN_WIDTH_80:
411 rx_status->vht_flag |= RX_VHT_FLAG_80MHZ;
412 break;
413 case RATE_MCS_CHAN_WIDTH_160:
414 rx_status->vht_flag |= RX_VHT_FLAG_160MHZ;
415 break;
416 }
417 if (rate_n_flags & RATE_MCS_SGI_MSK)
418 rx_status->flag |= RX_FLAG_SHORT_GI;
419 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
420 rx_status->flag |= RX_FLAG_HT_GF;
421 if (rate_n_flags & RATE_MCS_LDPC_MSK)
422 rx_status->flag |= RX_FLAG_LDPC;
423 if (rate_n_flags & RATE_MCS_HT_MSK) {
424 u8 stbc = (rate_n_flags & RATE_MCS_HT_STBC_MSK) >>
425 RATE_MCS_STBC_POS;
426 rx_status->flag |= RX_FLAG_HT;
427 rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
428 rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT;
429 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
430 u8 stbc = (rate_n_flags & RATE_MCS_VHT_STBC_MSK) >>
431 RATE_MCS_STBC_POS;
432 rx_status->vht_nss =
433 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
434 RATE_VHT_MCS_NSS_POS) + 1;
435 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;
436 rx_status->flag |= RX_FLAG_VHT;
437 rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT;
438 if (rate_n_flags & RATE_MCS_BF_MSK)
439 rx_status->vht_flag |= RX_VHT_FLAG_BF;
440 } else {
441 rx_status->rate_idx =
442 iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
443 rx_status->band);
444 }
445
446#ifdef CONFIG_IWLWIFI_DEBUGFS
447 iwl_mvm_update_frame_stats(mvm, rate_n_flags,
448 rx_status->flag & RX_FLAG_AMPDU_DETAILS);
449#endif
450
451 if (unlikely((ieee80211_is_beacon(hdr->frame_control) ||
452 ieee80211_is_probe_resp(hdr->frame_control)) &&
453 mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED))
454 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND;
455
456 iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb, hdr, len, ampdu_status,
457 crypt_len, rxb);
458}
459
460static void iwl_mvm_update_rx_statistics(struct iwl_mvm *mvm,
461 struct mvm_statistics_rx *rx_stats)
462{
463 lockdep_assert_held(&mvm->mutex);
464
465 mvm->rx_stats = *rx_stats;
466}
467
468struct iwl_mvm_stat_data {
469 struct iwl_mvm *mvm;
470 __le32 mac_id;
471 u8 beacon_filter_average_energy;
472 struct mvm_statistics_general_v8 *general;
473};
474
475static void iwl_mvm_stat_iterator(void *_data, u8 *mac,
476 struct ieee80211_vif *vif)
477{
478 struct iwl_mvm_stat_data *data = _data;
479 struct iwl_mvm *mvm = data->mvm;
480 int sig = -data->beacon_filter_average_energy;
481 int last_event;
482 int thold = vif->bss_conf.cqm_rssi_thold;
483 int hyst = vif->bss_conf.cqm_rssi_hyst;
484 u16 id = le32_to_cpu(data->mac_id);
485 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
486
487 /* This doesn't need the MAC ID check since it's not taking the
488 * data copied into the "data" struct, but rather the data from
489 * the notification directly.
490 */
491 if (data->general) {
492 mvmvif->beacon_stats.num_beacons =
493 le32_to_cpu(data->general->beacon_counter[mvmvif->id]);
494 mvmvif->beacon_stats.avg_signal =
495 -data->general->beacon_average_energy[mvmvif->id];
496 }
497
498 if (mvmvif->id != id)
499 return;
500
501 if (vif->type != NL80211_IFTYPE_STATION)
502 return;
503
504 if (sig == 0) {
505 IWL_DEBUG_RX(mvm, "RSSI is 0 - skip signal based decision\n");
506 return;
507 }
508
509 mvmvif->bf_data.ave_beacon_signal = sig;
510
511 /* BT Coex */
512 if (mvmvif->bf_data.bt_coex_min_thold !=
513 mvmvif->bf_data.bt_coex_max_thold) {
514 last_event = mvmvif->bf_data.last_bt_coex_event;
515 if (sig > mvmvif->bf_data.bt_coex_max_thold &&
516 (last_event <= mvmvif->bf_data.bt_coex_min_thold ||
517 last_event == 0)) {
518 mvmvif->bf_data.last_bt_coex_event = sig;
519 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex high %d\n",
520 sig);
521 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_HIGH);
522 } else if (sig < mvmvif->bf_data.bt_coex_min_thold &&
523 (last_event >= mvmvif->bf_data.bt_coex_max_thold ||
524 last_event == 0)) {
525 mvmvif->bf_data.last_bt_coex_event = sig;
526 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex low %d\n",
527 sig);
528 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_LOW);
529 }
530 }
531
532 if (!(vif->driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI))
533 return;
534
535 /* CQM Notification */
536 last_event = mvmvif->bf_data.last_cqm_event;
537 if (thold && sig < thold && (last_event == 0 ||
538 sig < last_event - hyst)) {
539 mvmvif->bf_data.last_cqm_event = sig;
540 IWL_DEBUG_RX(mvm, "cqm_iterator cqm low %d\n",
541 sig);
542 ieee80211_cqm_rssi_notify(
543 vif,
544 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
545 GFP_KERNEL);
546 } else if (sig > thold &&
547 (last_event == 0 || sig > last_event + hyst)) {
548 mvmvif->bf_data.last_cqm_event = sig;
549 IWL_DEBUG_RX(mvm, "cqm_iterator cqm high %d\n",
550 sig);
551 ieee80211_cqm_rssi_notify(
552 vif,
553 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
554 GFP_KERNEL);
555 }
556}
557
558static inline void
559iwl_mvm_rx_stats_check_trigger(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt)
560{
561 struct iwl_fw_dbg_trigger_tlv *trig;
562 struct iwl_fw_dbg_trigger_stats *trig_stats;
563 u32 trig_offset, trig_thold;
564
565 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_STATS))
566 return;
567
568 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_STATS);
569 trig_stats = (void *)trig->data;
570
571 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
572 return;
573
574 trig_offset = le32_to_cpu(trig_stats->stop_offset);
575 trig_thold = le32_to_cpu(trig_stats->stop_threshold);
576
577 if (WARN_ON_ONCE(trig_offset >= iwl_rx_packet_payload_len(pkt)))
578 return;
579
580 if (le32_to_cpup((__le32 *) (pkt->data + trig_offset)) < trig_thold)
581 return;
582
583 iwl_mvm_fw_dbg_collect_trig(mvm, trig, NULL);
584}
585
586void iwl_mvm_handle_rx_statistics(struct iwl_mvm *mvm,
587 struct iwl_rx_packet *pkt)
588{
589 struct iwl_notif_statistics_v10 *stats = (void *)&pkt->data;
590 struct iwl_mvm_stat_data data = {
591 .mvm = mvm,
592 };
593 u32 temperature;
594
595 if (iwl_rx_packet_payload_len(pkt) != sizeof(*stats))
596 goto invalid;
597
598 temperature = le32_to_cpu(stats->general.radio_temperature);
599 data.mac_id = stats->rx.general.mac_id;
600 data.beacon_filter_average_energy =
601 stats->general.beacon_filter_average_energy;
602
603 iwl_mvm_update_rx_statistics(mvm, &stats->rx);
604
605 mvm->radio_stats.rx_time = le64_to_cpu(stats->general.rx_time);
606 mvm->radio_stats.tx_time = le64_to_cpu(stats->general.tx_time);
607 mvm->radio_stats.on_time_rf =
608 le64_to_cpu(stats->general.on_time_rf);
609 mvm->radio_stats.on_time_scan =
610 le64_to_cpu(stats->general.on_time_scan);
611
612 data.general = &stats->general;
613
614 iwl_mvm_rx_stats_check_trigger(mvm, pkt);
615
616 ieee80211_iterate_active_interfaces(mvm->hw,
617 IEEE80211_IFACE_ITER_NORMAL,
618 iwl_mvm_stat_iterator,
619 &data);
620 return;
621 invalid:
622 IWL_ERR(mvm, "received invalid statistics size (%d)!\n",
623 iwl_rx_packet_payload_len(pkt));
624}
625
626void iwl_mvm_rx_statistics(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
627{
628 iwl_mvm_handle_rx_statistics(mvm, rxb_addr(rxb));
629}
630
631void iwl_mvm_window_status_notif(struct iwl_mvm *mvm,
632 struct iwl_rx_cmd_buffer *rxb)
633{
634 struct iwl_rx_packet *pkt = rxb_addr(rxb);
635 struct iwl_ba_window_status_notif *notif = (void *)pkt->data;
636 int i;
637 u32 pkt_len = iwl_rx_packet_payload_len(pkt);
638
639 if (WARN_ONCE(pkt_len != sizeof(*notif),
640 "Received window status notification of wrong size (%u)\n",
641 pkt_len))
642 return;
643
644 rcu_read_lock();
645 for (i = 0; i < BA_WINDOW_STREAMS_MAX; i++) {
646 struct ieee80211_sta *sta;
647 u8 sta_id, tid;
648 u64 bitmap;
649 u32 ssn;
650 u16 ratid;
651 u16 received_mpdu;
652
653 ratid = le16_to_cpu(notif->ra_tid[i]);
654 /* check that this TID is valid */
655 if (!(ratid & BA_WINDOW_STATUS_VALID_MSK))
656 continue;
657
658 received_mpdu = le16_to_cpu(notif->mpdu_rx_count[i]);
659 if (received_mpdu == 0)
660 continue;
661
662 tid = ratid & BA_WINDOW_STATUS_TID_MSK;
663 /* get the station */
664 sta_id = (ratid & BA_WINDOW_STATUS_STA_ID_MSK)
665 >> BA_WINDOW_STATUS_STA_ID_POS;
666 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
667 if (IS_ERR_OR_NULL(sta))
668 continue;
669 bitmap = le64_to_cpu(notif->bitmap[i]);
670 ssn = le32_to_cpu(notif->start_seq_num[i]);
671
672 /* update mac80211 with the bitmap for the reordering buffer */
673 ieee80211_mark_rx_ba_filtered_frames(sta, tid, ssn, bitmap,
674 received_mpdu);
675 }
676 rcu_read_unlock();
677}