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 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of version 2 of the GNU General Public License as
13 * published by the Free Software Foundation.
14 *
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
23 * USA
24 *
25 * The full GNU General Public License is included in this distribution
26 * in the file called COPYING.
27 *
28 * Contact Information:
29 * Intel Linux Wireless <ilw@linux.intel.com>
30 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
31 *
32 * BSD LICENSE
33 *
34 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
35 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
36 * All rights reserved.
37 *
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
40 * are met:
41 *
42 * * Redistributions of source code must retain the above copyright
43 * notice, this list of conditions and the following disclaimer.
44 * * Redistributions in binary form must reproduce the above copyright
45 * notice, this list of conditions and the following disclaimer in
46 * the documentation and/or other materials provided with the
47 * distribution.
48 * * Neither the name Intel Corporation nor the names of its
49 * contributors may be used to endorse or promote products derived
50 * from this software without specific prior written permission.
51 *
52 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
53 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
54 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
55 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
56 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
57 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
58 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
59 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
60 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
61 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
62 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
63 *****************************************************************************/
64 #include <linux/skbuff.h>
65 #include "iwl-trans.h"
66 #include "mvm.h"
67 #include "fw-api.h"
68
69 /*
70 * iwl_mvm_rx_rx_phy_cmd - REPLY_RX_PHY_CMD handler
71 *
72 * Copies the phy information in mvm->last_phy_info, it will be used when the
73 * actual data will come from the fw in the next packet.
74 */
iwl_mvm_rx_rx_phy_cmd(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)75 void iwl_mvm_rx_rx_phy_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
76 {
77 struct iwl_rx_packet *pkt = rxb_addr(rxb);
78
79 memcpy(&mvm->last_phy_info, pkt->data, sizeof(mvm->last_phy_info));
80 mvm->ampdu_ref++;
81
82 #ifdef CONFIG_IWLWIFI_DEBUGFS
83 if (mvm->last_phy_info.phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) {
84 spin_lock(&mvm->drv_stats_lock);
85 mvm->drv_rx_stats.ampdu_count++;
86 spin_unlock(&mvm->drv_stats_lock);
87 }
88 #endif
89 }
90
91 /*
92 * iwl_mvm_pass_packet_to_mac80211 - builds the packet for mac80211
93 *
94 * Adds the rxb to a new skb and give it to mac80211
95 */
iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm * mvm,struct napi_struct * napi,struct sk_buff * skb,struct ieee80211_hdr * hdr,u16 len,u32 ampdu_status,u8 crypt_len,struct iwl_rx_cmd_buffer * rxb)96 static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm,
97 struct napi_struct *napi,
98 struct sk_buff *skb,
99 struct ieee80211_hdr *hdr, u16 len,
100 u32 ampdu_status, u8 crypt_len,
101 struct iwl_rx_cmd_buffer *rxb)
102 {
103 unsigned int hdrlen, fraglen;
104
105 /* If frame is small enough to fit in skb->head, pull it completely.
106 * If not, only pull ieee80211_hdr (including crypto if present, and
107 * an additional 8 bytes for SNAP/ethertype, see below) so that
108 * splice() or TCP coalesce are more efficient.
109 *
110 * Since, in addition, ieee80211_data_to_8023() always pull in at
111 * least 8 bytes (possibly more for mesh) we can do the same here
112 * to save the cost of doing it later. That still doesn't pull in
113 * the actual IP header since the typical case has a SNAP header.
114 * If the latter changes (there are efforts in the standards group
115 * to do so) we should revisit this and ieee80211_data_to_8023().
116 */
117 hdrlen = (len <= skb_tailroom(skb)) ? len :
118 sizeof(*hdr) + crypt_len + 8;
119
120 memcpy(skb_put(skb, hdrlen), hdr, hdrlen);
121 fraglen = len - hdrlen;
122
123 if (fraglen) {
124 int offset = (void *)hdr + hdrlen -
125 rxb_addr(rxb) + rxb_offset(rxb);
126
127 skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset,
128 fraglen, rxb->truesize);
129 }
130
131 ieee80211_rx_napi(mvm->hw, skb, napi);
132 }
133
134 /*
135 * iwl_mvm_get_signal_strength - use new rx PHY INFO API
136 * values are reported by the fw as positive values - need to negate
137 * to obtain their dBM. Account for missing antennas by replacing 0
138 * values by -256dBm: practically 0 power and a non-feasible 8 bit value.
139 */
iwl_mvm_get_signal_strength(struct iwl_mvm * mvm,struct iwl_rx_phy_info * phy_info,struct ieee80211_rx_status * rx_status)140 static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm,
141 struct iwl_rx_phy_info *phy_info,
142 struct ieee80211_rx_status *rx_status)
143 {
144 int energy_a, energy_b, energy_c, max_energy;
145 u32 val;
146
147 val =
148 le32_to_cpu(phy_info->non_cfg_phy[IWL_RX_INFO_ENERGY_ANT_ABC_IDX]);
149 energy_a = (val & IWL_RX_INFO_ENERGY_ANT_A_MSK) >>
150 IWL_RX_INFO_ENERGY_ANT_A_POS;
151 energy_a = energy_a ? -energy_a : S8_MIN;
152 energy_b = (val & IWL_RX_INFO_ENERGY_ANT_B_MSK) >>
153 IWL_RX_INFO_ENERGY_ANT_B_POS;
154 energy_b = energy_b ? -energy_b : S8_MIN;
155 energy_c = (val & IWL_RX_INFO_ENERGY_ANT_C_MSK) >>
156 IWL_RX_INFO_ENERGY_ANT_C_POS;
157 energy_c = energy_c ? -energy_c : S8_MIN;
158 max_energy = max(energy_a, energy_b);
159 max_energy = max(max_energy, energy_c);
160
161 IWL_DEBUG_STATS(mvm, "energy In A %d B %d C %d , and max %d\n",
162 energy_a, energy_b, energy_c, max_energy);
163
164 rx_status->signal = max_energy;
165 rx_status->chains = (le16_to_cpu(phy_info->phy_flags) &
166 RX_RES_PHY_FLAGS_ANTENNA)
167 >> RX_RES_PHY_FLAGS_ANTENNA_POS;
168 rx_status->chain_signal[0] = energy_a;
169 rx_status->chain_signal[1] = energy_b;
170 rx_status->chain_signal[2] = energy_c;
171 }
172
173 /*
174 * iwl_mvm_set_mac80211_rx_flag - translate fw status to mac80211 format
175 * @mvm: the mvm object
176 * @hdr: 80211 header
177 * @stats: status in mac80211's format
178 * @rx_pkt_status: status coming from fw
179 *
180 * returns non 0 value if the packet should be dropped
181 */
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)182 static u32 iwl_mvm_set_mac80211_rx_flag(struct iwl_mvm *mvm,
183 struct ieee80211_hdr *hdr,
184 struct ieee80211_rx_status *stats,
185 u32 rx_pkt_status,
186 u8 *crypt_len)
187 {
188 if (!ieee80211_has_protected(hdr->frame_control) ||
189 (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
190 RX_MPDU_RES_STATUS_SEC_NO_ENC)
191 return 0;
192
193 /* packet was encrypted with unknown alg */
194 if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
195 RX_MPDU_RES_STATUS_SEC_ENC_ERR)
196 return 0;
197
198 switch (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) {
199 case RX_MPDU_RES_STATUS_SEC_CCM_ENC:
200 /* alg is CCM: check MIC only */
201 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK))
202 return -1;
203
204 stats->flag |= RX_FLAG_DECRYPTED;
205 *crypt_len = IEEE80211_CCMP_HDR_LEN;
206 return 0;
207
208 case RX_MPDU_RES_STATUS_SEC_TKIP_ENC:
209 /* Don't drop the frame and decrypt it in SW */
210 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_TTAK_OK))
211 return 0;
212 *crypt_len = IEEE80211_TKIP_IV_LEN;
213 /* fall through if TTAK OK */
214
215 case RX_MPDU_RES_STATUS_SEC_WEP_ENC:
216 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_ICV_OK))
217 return -1;
218
219 stats->flag |= RX_FLAG_DECRYPTED;
220 if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
221 RX_MPDU_RES_STATUS_SEC_WEP_ENC)
222 *crypt_len = IEEE80211_WEP_IV_LEN;
223 return 0;
224
225 case RX_MPDU_RES_STATUS_SEC_EXT_ENC:
226 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK))
227 return -1;
228 stats->flag |= RX_FLAG_DECRYPTED;
229 return 0;
230
231 default:
232 IWL_ERR(mvm, "Unhandled alg: 0x%x\n", rx_pkt_status);
233 }
234
235 return 0;
236 }
237
iwl_mvm_rx_csum(struct ieee80211_sta * sta,struct sk_buff * skb,u32 status)238 static void iwl_mvm_rx_csum(struct ieee80211_sta *sta,
239 struct sk_buff *skb,
240 u32 status)
241 {
242 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
243 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
244
245 if (mvmvif->features & NETIF_F_RXCSUM &&
246 status & RX_MPDU_RES_STATUS_CSUM_DONE &&
247 status & RX_MPDU_RES_STATUS_CSUM_OK)
248 skb->ip_summed = CHECKSUM_UNNECESSARY;
249 }
250
251 /*
252 * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler
253 *
254 * Handles the actual data of the Rx packet from the fw
255 */
iwl_mvm_rx_rx_mpdu(struct iwl_mvm * mvm,struct napi_struct * napi,struct iwl_rx_cmd_buffer * rxb)256 void iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct napi_struct *napi,
257 struct iwl_rx_cmd_buffer *rxb)
258 {
259 struct ieee80211_hdr *hdr;
260 struct ieee80211_rx_status *rx_status;
261 struct iwl_rx_packet *pkt = rxb_addr(rxb);
262 struct iwl_rx_phy_info *phy_info;
263 struct iwl_rx_mpdu_res_start *rx_res;
264 struct ieee80211_sta *sta;
265 struct sk_buff *skb;
266 u32 len;
267 u32 ampdu_status;
268 u32 rate_n_flags;
269 u32 rx_pkt_status;
270 u8 crypt_len = 0;
271
272 phy_info = &mvm->last_phy_info;
273 rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data;
274 hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res));
275 len = le16_to_cpu(rx_res->byte_count);
276 rx_pkt_status = le32_to_cpup((__le32 *)
277 (pkt->data + sizeof(*rx_res) + len));
278
279 /* Dont use dev_alloc_skb(), we'll have enough headroom once
280 * ieee80211_hdr pulled.
281 */
282 skb = alloc_skb(128, GFP_ATOMIC);
283 if (!skb) {
284 IWL_ERR(mvm, "alloc_skb failed\n");
285 return;
286 }
287
288 rx_status = IEEE80211_SKB_RXCB(skb);
289
290 /*
291 * drop the packet if it has failed being decrypted by HW
292 */
293 if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, rx_status, rx_pkt_status,
294 &crypt_len)) {
295 IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n",
296 rx_pkt_status);
297 kfree_skb(skb);
298 return;
299 }
300
301 /*
302 * Keep packets with CRC errors (and with overrun) for monitor mode
303 * (otherwise the firmware discards them) but mark them as bad.
304 */
305 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) ||
306 !(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) {
307 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status);
308 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
309 }
310
311 /* This will be used in several places later */
312 rate_n_flags = le32_to_cpu(phy_info->rate_n_flags);
313
314 /* rx_status carries information about the packet to mac80211 */
315 rx_status->mactime = le64_to_cpu(phy_info->timestamp);
316 rx_status->device_timestamp = le32_to_cpu(phy_info->system_timestamp);
317 rx_status->band =
318 (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ?
319 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
320 rx_status->freq =
321 ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel),
322 rx_status->band);
323 /*
324 * TSF as indicated by the fw is at INA time, but mac80211 expects the
325 * TSF at the beginning of the MPDU.
326 */
327 /*rx_status->flag |= RX_FLAG_MACTIME_MPDU;*/
328
329 iwl_mvm_get_signal_strength(mvm, phy_info, rx_status);
330
331 IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status->signal,
332 (unsigned long long)rx_status->mactime);
333
334 rcu_read_lock();
335 /*
336 * We have tx blocked stations (with CS bit). If we heard frames from
337 * a blocked station on a new channel we can TX to it again.
338 */
339 if (unlikely(mvm->csa_tx_block_bcn_timeout)) {
340 sta = ieee80211_find_sta(
341 rcu_dereference(mvm->csa_tx_blocked_vif), hdr->addr2);
342 if (sta)
343 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, false);
344 }
345
346 /* This is fine since we don't support multiple AP interfaces */
347 sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL);
348 if (sta) {
349 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
350
351 rs_update_last_rssi(mvm, &mvmsta->lq_sta, rx_status);
352
353 if (iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_RSSI) &&
354 ieee80211_is_beacon(hdr->frame_control)) {
355 struct iwl_fw_dbg_trigger_tlv *trig;
356 struct iwl_fw_dbg_trigger_low_rssi *rssi_trig;
357 bool trig_check;
358 s32 rssi;
359
360 trig = iwl_fw_dbg_get_trigger(mvm->fw,
361 FW_DBG_TRIGGER_RSSI);
362 rssi_trig = (void *)trig->data;
363 rssi = le32_to_cpu(rssi_trig->rssi);
364
365 trig_check =
366 iwl_fw_dbg_trigger_check_stop(mvm, mvmsta->vif,
367 trig);
368 if (trig_check && rx_status->signal < rssi)
369 iwl_mvm_fw_dbg_collect_trig(mvm, trig, NULL);
370 }
371 }
372
373 if (sta && ieee80211_is_data(hdr->frame_control))
374 iwl_mvm_rx_csum(sta, skb, rx_pkt_status);
375
376 rcu_read_unlock();
377
378 /* set the preamble flag if appropriate */
379 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE))
380 rx_status->flag |= RX_FLAG_SHORTPRE;
381
382 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) {
383 /*
384 * We know which subframes of an A-MPDU belong
385 * together since we get a single PHY response
386 * from the firmware for all of them
387 */
388 rx_status->flag |= RX_FLAG_AMPDU_DETAILS;
389 rx_status->ampdu_reference = mvm->ampdu_ref;
390 }
391
392 /* Set up the HT phy flags */
393 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
394 case RATE_MCS_CHAN_WIDTH_20:
395 break;
396 case RATE_MCS_CHAN_WIDTH_40:
397 rx_status->flag |= RX_FLAG_40MHZ;
398 break;
399 case RATE_MCS_CHAN_WIDTH_80:
400 rx_status->vht_flag |= RX_VHT_FLAG_80MHZ;
401 break;
402 case RATE_MCS_CHAN_WIDTH_160:
403 rx_status->vht_flag |= RX_VHT_FLAG_160MHZ;
404 break;
405 }
406 if (rate_n_flags & RATE_MCS_SGI_MSK)
407 rx_status->flag |= RX_FLAG_SHORT_GI;
408 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
409 rx_status->flag |= RX_FLAG_HT_GF;
410 if (rate_n_flags & RATE_MCS_LDPC_MSK)
411 rx_status->flag |= RX_FLAG_LDPC;
412 if (rate_n_flags & RATE_MCS_HT_MSK) {
413 u8 stbc = (rate_n_flags & RATE_MCS_HT_STBC_MSK) >>
414 RATE_MCS_STBC_POS;
415 rx_status->flag |= RX_FLAG_HT;
416 rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
417 rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT;
418 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
419 u8 stbc = (rate_n_flags & RATE_MCS_VHT_STBC_MSK) >>
420 RATE_MCS_STBC_POS;
421 rx_status->vht_nss =
422 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
423 RATE_VHT_MCS_NSS_POS) + 1;
424 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;
425 rx_status->flag |= RX_FLAG_VHT;
426 rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT;
427 if (rate_n_flags & RATE_MCS_BF_MSK)
428 rx_status->vht_flag |= RX_VHT_FLAG_BF;
429 } else {
430 rx_status->rate_idx =
431 iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
432 rx_status->band);
433 }
434
435 #ifdef CONFIG_IWLWIFI_DEBUGFS
436 iwl_mvm_update_frame_stats(mvm, rate_n_flags,
437 rx_status->flag & RX_FLAG_AMPDU_DETAILS);
438 #endif
439 iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb, hdr, len, ampdu_status,
440 crypt_len, rxb);
441 }
442
iwl_mvm_update_rx_statistics(struct iwl_mvm * mvm,struct mvm_statistics_rx * rx_stats)443 static void iwl_mvm_update_rx_statistics(struct iwl_mvm *mvm,
444 struct mvm_statistics_rx *rx_stats)
445 {
446 lockdep_assert_held(&mvm->mutex);
447
448 mvm->rx_stats = *rx_stats;
449 }
450
451 struct iwl_mvm_stat_data {
452 struct iwl_mvm *mvm;
453 __le32 mac_id;
454 u8 beacon_filter_average_energy;
455 struct mvm_statistics_general_v8 *general;
456 };
457
iwl_mvm_stat_iterator(void * _data,u8 * mac,struct ieee80211_vif * vif)458 static void iwl_mvm_stat_iterator(void *_data, u8 *mac,
459 struct ieee80211_vif *vif)
460 {
461 struct iwl_mvm_stat_data *data = _data;
462 struct iwl_mvm *mvm = data->mvm;
463 int sig = -data->beacon_filter_average_energy;
464 int last_event;
465 int thold = vif->bss_conf.cqm_rssi_thold;
466 int hyst = vif->bss_conf.cqm_rssi_hyst;
467 u16 id = le32_to_cpu(data->mac_id);
468 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
469
470 /* This doesn't need the MAC ID check since it's not taking the
471 * data copied into the "data" struct, but rather the data from
472 * the notification directly.
473 */
474 if (data->general) {
475 mvmvif->beacon_stats.num_beacons =
476 le32_to_cpu(data->general->beacon_counter[mvmvif->id]);
477 mvmvif->beacon_stats.avg_signal =
478 -data->general->beacon_average_energy[mvmvif->id];
479 }
480
481 if (mvmvif->id != id)
482 return;
483
484 if (vif->type != NL80211_IFTYPE_STATION)
485 return;
486
487 if (sig == 0) {
488 IWL_DEBUG_RX(mvm, "RSSI is 0 - skip signal based decision\n");
489 return;
490 }
491
492 mvmvif->bf_data.ave_beacon_signal = sig;
493
494 /* BT Coex */
495 if (mvmvif->bf_data.bt_coex_min_thold !=
496 mvmvif->bf_data.bt_coex_max_thold) {
497 last_event = mvmvif->bf_data.last_bt_coex_event;
498 if (sig > mvmvif->bf_data.bt_coex_max_thold &&
499 (last_event <= mvmvif->bf_data.bt_coex_min_thold ||
500 last_event == 0)) {
501 mvmvif->bf_data.last_bt_coex_event = sig;
502 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex high %d\n",
503 sig);
504 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_HIGH);
505 } else if (sig < mvmvif->bf_data.bt_coex_min_thold &&
506 (last_event >= mvmvif->bf_data.bt_coex_max_thold ||
507 last_event == 0)) {
508 mvmvif->bf_data.last_bt_coex_event = sig;
509 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex low %d\n",
510 sig);
511 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_LOW);
512 }
513 }
514
515 if (!(vif->driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI))
516 return;
517
518 /* CQM Notification */
519 last_event = mvmvif->bf_data.last_cqm_event;
520 if (thold && sig < thold && (last_event == 0 ||
521 sig < last_event - hyst)) {
522 mvmvif->bf_data.last_cqm_event = sig;
523 IWL_DEBUG_RX(mvm, "cqm_iterator cqm low %d\n",
524 sig);
525 ieee80211_cqm_rssi_notify(
526 vif,
527 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
528 GFP_KERNEL);
529 } else if (sig > thold &&
530 (last_event == 0 || sig > last_event + hyst)) {
531 mvmvif->bf_data.last_cqm_event = sig;
532 IWL_DEBUG_RX(mvm, "cqm_iterator cqm high %d\n",
533 sig);
534 ieee80211_cqm_rssi_notify(
535 vif,
536 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
537 GFP_KERNEL);
538 }
539 }
540
541 static inline void
iwl_mvm_rx_stats_check_trigger(struct iwl_mvm * mvm,struct iwl_rx_packet * pkt)542 iwl_mvm_rx_stats_check_trigger(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt)
543 {
544 struct iwl_fw_dbg_trigger_tlv *trig;
545 struct iwl_fw_dbg_trigger_stats *trig_stats;
546 u32 trig_offset, trig_thold;
547
548 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_STATS))
549 return;
550
551 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_STATS);
552 trig_stats = (void *)trig->data;
553
554 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
555 return;
556
557 trig_offset = le32_to_cpu(trig_stats->stop_offset);
558 trig_thold = le32_to_cpu(trig_stats->stop_threshold);
559
560 if (WARN_ON_ONCE(trig_offset >= iwl_rx_packet_payload_len(pkt)))
561 return;
562
563 if (le32_to_cpup((__le32 *) (pkt->data + trig_offset)) < trig_thold)
564 return;
565
566 iwl_mvm_fw_dbg_collect_trig(mvm, trig, NULL);
567 }
568
iwl_mvm_handle_rx_statistics(struct iwl_mvm * mvm,struct iwl_rx_packet * pkt)569 void iwl_mvm_handle_rx_statistics(struct iwl_mvm *mvm,
570 struct iwl_rx_packet *pkt)
571 {
572 struct iwl_notif_statistics_v10 *stats = (void *)&pkt->data;
573 struct iwl_mvm_stat_data data = {
574 .mvm = mvm,
575 };
576 u32 temperature;
577
578 if (iwl_rx_packet_payload_len(pkt) != sizeof(*stats))
579 goto invalid;
580
581 temperature = le32_to_cpu(stats->general.radio_temperature);
582 data.mac_id = stats->rx.general.mac_id;
583 data.beacon_filter_average_energy =
584 stats->general.beacon_filter_average_energy;
585
586 iwl_mvm_update_rx_statistics(mvm, &stats->rx);
587
588 mvm->radio_stats.rx_time = le64_to_cpu(stats->general.rx_time);
589 mvm->radio_stats.tx_time = le64_to_cpu(stats->general.tx_time);
590 mvm->radio_stats.on_time_rf =
591 le64_to_cpu(stats->general.on_time_rf);
592 mvm->radio_stats.on_time_scan =
593 le64_to_cpu(stats->general.on_time_scan);
594
595 data.general = &stats->general;
596
597 iwl_mvm_rx_stats_check_trigger(mvm, pkt);
598
599 ieee80211_iterate_active_interfaces(mvm->hw,
600 IEEE80211_IFACE_ITER_NORMAL,
601 iwl_mvm_stat_iterator,
602 &data);
603 return;
604 invalid:
605 IWL_ERR(mvm, "received invalid statistics size (%d)!\n",
606 iwl_rx_packet_payload_len(pkt));
607 }
608
iwl_mvm_rx_statistics(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)609 void iwl_mvm_rx_statistics(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
610 {
611 iwl_mvm_handle_rx_statistics(mvm, rxb_addr(rxb));
612 }
613