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[deliverable/linux.git] / drivers / net / wireless / iwlwifi / mvm / rx.c
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 "iwl-trans.h"
65 #include "mvm.h"
66 #include "fw-api.h"
67
68 /*
69 * iwl_mvm_rx_rx_phy_cmd - REPLY_RX_PHY_CMD handler
70 *
71 * Copies the phy information in mvm->last_phy_info, it will be used when the
72 * actual data will come from the fw in the next packet.
73 */
74 void iwl_mvm_rx_rx_phy_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
75 {
76 struct iwl_rx_packet *pkt = rxb_addr(rxb);
77
78 memcpy(&mvm->last_phy_info, pkt->data, sizeof(mvm->last_phy_info));
79 mvm->ampdu_ref++;
80
81 #ifdef CONFIG_IWLWIFI_DEBUGFS
82 if (mvm->last_phy_info.phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) {
83 spin_lock(&mvm->drv_stats_lock);
84 mvm->drv_rx_stats.ampdu_count++;
85 spin_unlock(&mvm->drv_stats_lock);
86 }
87 #endif
88 }
89
90 /*
91 * iwl_mvm_pass_packet_to_mac80211 - builds the packet for mac80211
92 *
93 * Adds the rxb to a new skb and give it to mac80211
94 */
95 static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm,
96 struct sk_buff *skb,
97 struct ieee80211_hdr *hdr, u16 len,
98 u32 ampdu_status, u8 crypt_len,
99 struct iwl_rx_cmd_buffer *rxb)
100 {
101 unsigned int hdrlen, fraglen;
102
103 /* If frame is small enough to fit in skb->head, pull it completely.
104 * If not, only pull ieee80211_hdr (including crypto if present, and
105 * an additional 8 bytes for SNAP/ethertype, see below) so that
106 * splice() or TCP coalesce are more efficient.
107 *
108 * Since, in addition, ieee80211_data_to_8023() always pull in at
109 * least 8 bytes (possibly more for mesh) we can do the same here
110 * to save the cost of doing it later. That still doesn't pull in
111 * the actual IP header since the typical case has a SNAP header.
112 * If the latter changes (there are efforts in the standards group
113 * to do so) we should revisit this and ieee80211_data_to_8023().
114 */
115 hdrlen = (len <= skb_tailroom(skb)) ? len :
116 sizeof(*hdr) + crypt_len + 8;
117
118 memcpy(skb_put(skb, hdrlen), hdr, hdrlen);
119 fraglen = len - hdrlen;
120
121 if (fraglen) {
122 int offset = (void *)hdr + hdrlen -
123 rxb_addr(rxb) + rxb_offset(rxb);
124
125 skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset,
126 fraglen, rxb->truesize);
127 }
128
129 ieee80211_rx(mvm->hw, skb);
130 }
131
132 /*
133 * iwl_mvm_get_signal_strength - use new rx PHY INFO API
134 * values are reported by the fw as positive values - need to negate
135 * to obtain their dBM. Account for missing antennas by replacing 0
136 * values by -256dBm: practically 0 power and a non-feasible 8 bit value.
137 */
138 static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm,
139 struct iwl_rx_phy_info *phy_info,
140 struct ieee80211_rx_status *rx_status)
141 {
142 int energy_a, energy_b, energy_c, max_energy;
143 u32 val;
144
145 val =
146 le32_to_cpu(phy_info->non_cfg_phy[IWL_RX_INFO_ENERGY_ANT_ABC_IDX]);
147 energy_a = (val & IWL_RX_INFO_ENERGY_ANT_A_MSK) >>
148 IWL_RX_INFO_ENERGY_ANT_A_POS;
149 energy_a = energy_a ? -energy_a : S8_MIN;
150 energy_b = (val & IWL_RX_INFO_ENERGY_ANT_B_MSK) >>
151 IWL_RX_INFO_ENERGY_ANT_B_POS;
152 energy_b = energy_b ? -energy_b : S8_MIN;
153 energy_c = (val & IWL_RX_INFO_ENERGY_ANT_C_MSK) >>
154 IWL_RX_INFO_ENERGY_ANT_C_POS;
155 energy_c = energy_c ? -energy_c : S8_MIN;
156 max_energy = max(energy_a, energy_b);
157 max_energy = max(max_energy, energy_c);
158
159 IWL_DEBUG_STATS(mvm, "energy In A %d B %d C %d , and max %d\n",
160 energy_a, energy_b, energy_c, max_energy);
161
162 rx_status->signal = max_energy;
163 rx_status->chains = (le16_to_cpu(phy_info->phy_flags) &
164 RX_RES_PHY_FLAGS_ANTENNA)
165 >> RX_RES_PHY_FLAGS_ANTENNA_POS;
166 rx_status->chain_signal[0] = energy_a;
167 rx_status->chain_signal[1] = energy_b;
168 rx_status->chain_signal[2] = energy_c;
169 }
170
171 /*
172 * iwl_mvm_set_mac80211_rx_flag - translate fw status to mac80211 format
173 * @mvm: the mvm object
174 * @hdr: 80211 header
175 * @stats: status in mac80211's format
176 * @rx_pkt_status: status coming from fw
177 *
178 * returns non 0 value if the packet should be dropped
179 */
180 static u32 iwl_mvm_set_mac80211_rx_flag(struct iwl_mvm *mvm,
181 struct ieee80211_hdr *hdr,
182 struct ieee80211_rx_status *stats,
183 u32 rx_pkt_status,
184 u8 *crypt_len)
185 {
186 if (!ieee80211_has_protected(hdr->frame_control) ||
187 (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
188 RX_MPDU_RES_STATUS_SEC_NO_ENC)
189 return 0;
190
191 /* packet was encrypted with unknown alg */
192 if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
193 RX_MPDU_RES_STATUS_SEC_ENC_ERR)
194 return 0;
195
196 switch (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) {
197 case RX_MPDU_RES_STATUS_SEC_CCM_ENC:
198 /* alg is CCM: check MIC only */
199 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK))
200 return -1;
201
202 stats->flag |= RX_FLAG_DECRYPTED;
203 IWL_DEBUG_WEP(mvm, "hw decrypted CCMP successfully\n");
204 *crypt_len = IEEE80211_CCMP_HDR_LEN;
205 return 0;
206
207 case RX_MPDU_RES_STATUS_SEC_TKIP_ENC:
208 /* Don't drop the frame and decrypt it in SW */
209 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_TTAK_OK))
210 return 0;
211 *crypt_len = IEEE80211_TKIP_IV_LEN;
212 /* fall through if TTAK OK */
213
214 case RX_MPDU_RES_STATUS_SEC_WEP_ENC:
215 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_ICV_OK))
216 return -1;
217
218 stats->flag |= RX_FLAG_DECRYPTED;
219 if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
220 RX_MPDU_RES_STATUS_SEC_WEP_ENC)
221 *crypt_len = IEEE80211_WEP_IV_LEN;
222 return 0;
223
224 case RX_MPDU_RES_STATUS_SEC_EXT_ENC:
225 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK))
226 return -1;
227 stats->flag |= RX_FLAG_DECRYPTED;
228 return 0;
229
230 default:
231 IWL_ERR(mvm, "Unhandled alg: 0x%x\n", rx_pkt_status);
232 }
233
234 return 0;
235 }
236
237 /*
238 * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler
239 *
240 * Handles the actual data of the Rx packet from the fw
241 */
242 void iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
243 {
244 struct ieee80211_hdr *hdr;
245 struct ieee80211_rx_status *rx_status;
246 struct iwl_rx_packet *pkt = rxb_addr(rxb);
247 struct iwl_rx_phy_info *phy_info;
248 struct iwl_rx_mpdu_res_start *rx_res;
249 struct ieee80211_sta *sta;
250 struct sk_buff *skb;
251 u32 len;
252 u32 ampdu_status;
253 u32 rate_n_flags;
254 u32 rx_pkt_status;
255 u8 crypt_len = 0;
256
257 phy_info = &mvm->last_phy_info;
258 rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data;
259 hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res));
260 len = le16_to_cpu(rx_res->byte_count);
261 rx_pkt_status = le32_to_cpup((__le32 *)
262 (pkt->data + sizeof(*rx_res) + len));
263
264 /* Dont use dev_alloc_skb(), we'll have enough headroom once
265 * ieee80211_hdr pulled.
266 */
267 skb = alloc_skb(128, GFP_ATOMIC);
268 if (!skb) {
269 IWL_ERR(mvm, "alloc_skb failed\n");
270 return;
271 }
272
273 rx_status = IEEE80211_SKB_RXCB(skb);
274
275 /*
276 * drop the packet if it has failed being decrypted by HW
277 */
278 if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, rx_status, rx_pkt_status,
279 &crypt_len)) {
280 IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n",
281 rx_pkt_status);
282 kfree_skb(skb);
283 return;
284 }
285
286 if ((unlikely(phy_info->cfg_phy_cnt > 20))) {
287 IWL_DEBUG_DROP(mvm, "dsp size out of range [0,20]: %d\n",
288 phy_info->cfg_phy_cnt);
289 kfree_skb(skb);
290 return;
291 }
292
293 /*
294 * Keep packets with CRC errors (and with overrun) for monitor mode
295 * (otherwise the firmware discards them) but mark them as bad.
296 */
297 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) ||
298 !(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) {
299 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status);
300 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
301 }
302
303 /* This will be used in several places later */
304 rate_n_flags = le32_to_cpu(phy_info->rate_n_flags);
305
306 /* rx_status carries information about the packet to mac80211 */
307 rx_status->mactime = le64_to_cpu(phy_info->timestamp);
308 rx_status->device_timestamp = le32_to_cpu(phy_info->system_timestamp);
309 rx_status->band =
310 (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ?
311 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
312 rx_status->freq =
313 ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel),
314 rx_status->band);
315 /*
316 * TSF as indicated by the fw is at INA time, but mac80211 expects the
317 * TSF at the beginning of the MPDU.
318 */
319 /*rx_status->flag |= RX_FLAG_MACTIME_MPDU;*/
320
321 iwl_mvm_get_signal_strength(mvm, phy_info, rx_status);
322
323 IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status->signal,
324 (unsigned long long)rx_status->mactime);
325
326 rcu_read_lock();
327 /*
328 * We have tx blocked stations (with CS bit). If we heard frames from
329 * a blocked station on a new channel we can TX to it again.
330 */
331 if (unlikely(mvm->csa_tx_block_bcn_timeout)) {
332 sta = ieee80211_find_sta(
333 rcu_dereference(mvm->csa_tx_blocked_vif), hdr->addr2);
334 if (sta)
335 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, false);
336 }
337
338 /* This is fine since we don't support multiple AP interfaces */
339 sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL);
340 if (sta) {
341 struct iwl_mvm_sta *mvmsta;
342 mvmsta = iwl_mvm_sta_from_mac80211(sta);
343 rs_update_last_rssi(mvm, &mvmsta->lq_sta, rx_status);
344
345 if (iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_RSSI) &&
346 ieee80211_is_beacon(hdr->frame_control)) {
347 struct iwl_fw_dbg_trigger_tlv *trig;
348 struct iwl_fw_dbg_trigger_low_rssi *rssi_trig;
349 bool trig_check;
350 s32 rssi;
351
352 trig = iwl_fw_dbg_get_trigger(mvm->fw,
353 FW_DBG_TRIGGER_RSSI);
354 rssi_trig = (void *)trig->data;
355 rssi = le32_to_cpu(rssi_trig->rssi);
356
357 trig_check =
358 iwl_fw_dbg_trigger_check_stop(mvm, mvmsta->vif,
359 trig);
360 if (trig_check && rx_status->signal < rssi)
361 iwl_mvm_fw_dbg_collect_trig(mvm, trig, NULL);
362 }
363 }
364
365 rcu_read_unlock();
366
367 /* set the preamble flag if appropriate */
368 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE))
369 rx_status->flag |= RX_FLAG_SHORTPRE;
370
371 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) {
372 /*
373 * We know which subframes of an A-MPDU belong
374 * together since we get a single PHY response
375 * from the firmware for all of them
376 */
377 rx_status->flag |= RX_FLAG_AMPDU_DETAILS;
378 rx_status->ampdu_reference = mvm->ampdu_ref;
379 }
380
381 /* Set up the HT phy flags */
382 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
383 case RATE_MCS_CHAN_WIDTH_20:
384 break;
385 case RATE_MCS_CHAN_WIDTH_40:
386 rx_status->flag |= RX_FLAG_40MHZ;
387 break;
388 case RATE_MCS_CHAN_WIDTH_80:
389 rx_status->vht_flag |= RX_VHT_FLAG_80MHZ;
390 break;
391 case RATE_MCS_CHAN_WIDTH_160:
392 rx_status->vht_flag |= RX_VHT_FLAG_160MHZ;
393 break;
394 }
395 if (rate_n_flags & RATE_MCS_SGI_MSK)
396 rx_status->flag |= RX_FLAG_SHORT_GI;
397 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
398 rx_status->flag |= RX_FLAG_HT_GF;
399 if (rate_n_flags & RATE_MCS_LDPC_MSK)
400 rx_status->flag |= RX_FLAG_LDPC;
401 if (rate_n_flags & RATE_MCS_HT_MSK) {
402 u8 stbc = (rate_n_flags & RATE_MCS_HT_STBC_MSK) >>
403 RATE_MCS_STBC_POS;
404 rx_status->flag |= RX_FLAG_HT;
405 rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
406 rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT;
407 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
408 u8 stbc = (rate_n_flags & RATE_MCS_VHT_STBC_MSK) >>
409 RATE_MCS_STBC_POS;
410 rx_status->vht_nss =
411 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
412 RATE_VHT_MCS_NSS_POS) + 1;
413 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;
414 rx_status->flag |= RX_FLAG_VHT;
415 rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT;
416 if (rate_n_flags & RATE_MCS_BF_MSK)
417 rx_status->vht_flag |= RX_VHT_FLAG_BF;
418 } else {
419 rx_status->rate_idx =
420 iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
421 rx_status->band);
422 }
423
424 #ifdef CONFIG_IWLWIFI_DEBUGFS
425 iwl_mvm_update_frame_stats(mvm, rate_n_flags,
426 rx_status->flag & RX_FLAG_AMPDU_DETAILS);
427 #endif
428 iwl_mvm_pass_packet_to_mac80211(mvm, skb, hdr, len, ampdu_status,
429 crypt_len, rxb);
430 }
431
432 static void iwl_mvm_update_rx_statistics(struct iwl_mvm *mvm,
433 struct mvm_statistics_rx *rx_stats)
434 {
435 lockdep_assert_held(&mvm->mutex);
436
437 mvm->rx_stats = *rx_stats;
438 }
439
440 struct iwl_mvm_stat_data {
441 struct iwl_mvm *mvm;
442 __le32 mac_id;
443 __s8 beacon_filter_average_energy;
444 struct mvm_statistics_general_v8 *general;
445 };
446
447 static void iwl_mvm_stat_iterator(void *_data, u8 *mac,
448 struct ieee80211_vif *vif)
449 {
450 struct iwl_mvm_stat_data *data = _data;
451 struct iwl_mvm *mvm = data->mvm;
452 int sig = -data->beacon_filter_average_energy;
453 int last_event;
454 int thold = vif->bss_conf.cqm_rssi_thold;
455 int hyst = vif->bss_conf.cqm_rssi_hyst;
456 u16 id = le32_to_cpu(data->mac_id);
457 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
458
459 /* This doesn't need the MAC ID check since it's not taking the
460 * data copied into the "data" struct, but rather the data from
461 * the notification directly.
462 */
463 if (data->general) {
464 mvmvif->beacon_stats.num_beacons =
465 le32_to_cpu(data->general->beacon_counter[mvmvif->id]);
466 mvmvif->beacon_stats.avg_signal =
467 -data->general->beacon_average_energy[mvmvif->id];
468 }
469
470 if (mvmvif->id != id)
471 return;
472
473 if (vif->type != NL80211_IFTYPE_STATION)
474 return;
475
476 if (sig == 0) {
477 IWL_DEBUG_RX(mvm, "RSSI is 0 - skip signal based decision\n");
478 return;
479 }
480
481 mvmvif->bf_data.ave_beacon_signal = sig;
482
483 /* BT Coex */
484 if (mvmvif->bf_data.bt_coex_min_thold !=
485 mvmvif->bf_data.bt_coex_max_thold) {
486 last_event = mvmvif->bf_data.last_bt_coex_event;
487 if (sig > mvmvif->bf_data.bt_coex_max_thold &&
488 (last_event <= mvmvif->bf_data.bt_coex_min_thold ||
489 last_event == 0)) {
490 mvmvif->bf_data.last_bt_coex_event = sig;
491 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex high %d\n",
492 sig);
493 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_HIGH);
494 } else if (sig < mvmvif->bf_data.bt_coex_min_thold &&
495 (last_event >= mvmvif->bf_data.bt_coex_max_thold ||
496 last_event == 0)) {
497 mvmvif->bf_data.last_bt_coex_event = sig;
498 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex low %d\n",
499 sig);
500 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_LOW);
501 }
502 }
503
504 if (!(vif->driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI))
505 return;
506
507 /* CQM Notification */
508 last_event = mvmvif->bf_data.last_cqm_event;
509 if (thold && sig < thold && (last_event == 0 ||
510 sig < last_event - hyst)) {
511 mvmvif->bf_data.last_cqm_event = sig;
512 IWL_DEBUG_RX(mvm, "cqm_iterator cqm low %d\n",
513 sig);
514 ieee80211_cqm_rssi_notify(
515 vif,
516 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
517 GFP_KERNEL);
518 } else if (sig > thold &&
519 (last_event == 0 || sig > last_event + hyst)) {
520 mvmvif->bf_data.last_cqm_event = sig;
521 IWL_DEBUG_RX(mvm, "cqm_iterator cqm high %d\n",
522 sig);
523 ieee80211_cqm_rssi_notify(
524 vif,
525 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
526 GFP_KERNEL);
527 }
528 }
529
530 static inline void
531 iwl_mvm_rx_stats_check_trigger(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt)
532 {
533 struct iwl_fw_dbg_trigger_tlv *trig;
534 struct iwl_fw_dbg_trigger_stats *trig_stats;
535 u32 trig_offset, trig_thold;
536
537 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_STATS))
538 return;
539
540 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_STATS);
541 trig_stats = (void *)trig->data;
542
543 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
544 return;
545
546 trig_offset = le32_to_cpu(trig_stats->stop_offset);
547 trig_thold = le32_to_cpu(trig_stats->stop_threshold);
548
549 if (WARN_ON_ONCE(trig_offset >= iwl_rx_packet_payload_len(pkt)))
550 return;
551
552 if (le32_to_cpup((__le32 *) (pkt->data + trig_offset)) < trig_thold)
553 return;
554
555 iwl_mvm_fw_dbg_collect_trig(mvm, trig, NULL);
556 }
557
558 void iwl_mvm_handle_rx_statistics(struct iwl_mvm *mvm,
559 struct iwl_rx_packet *pkt)
560 {
561 size_t v8_len = sizeof(struct iwl_notif_statistics_v8);
562 size_t v10_len = sizeof(struct iwl_notif_statistics_v10);
563 struct iwl_mvm_stat_data data = {
564 .mvm = mvm,
565 };
566 u32 temperature;
567
568 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STATS_V10)) {
569 struct iwl_notif_statistics_v10 *stats = (void *)&pkt->data;
570
571 if (iwl_rx_packet_payload_len(pkt) != v10_len)
572 goto invalid;
573
574 temperature = le32_to_cpu(stats->general.radio_temperature);
575 data.mac_id = stats->rx.general.mac_id;
576 data.beacon_filter_average_energy =
577 stats->general.beacon_filter_average_energy;
578
579 iwl_mvm_update_rx_statistics(mvm, &stats->rx);
580
581 mvm->radio_stats.rx_time = le64_to_cpu(stats->general.rx_time);
582 mvm->radio_stats.tx_time = le64_to_cpu(stats->general.tx_time);
583 mvm->radio_stats.on_time_rf =
584 le64_to_cpu(stats->general.on_time_rf);
585 mvm->radio_stats.on_time_scan =
586 le64_to_cpu(stats->general.on_time_scan);
587
588 data.general = &stats->general;
589 } else {
590 struct iwl_notif_statistics_v8 *stats = (void *)&pkt->data;
591
592 if (iwl_rx_packet_payload_len(pkt) != v8_len)
593 goto invalid;
594
595 temperature = le32_to_cpu(stats->general.radio_temperature);
596 data.mac_id = stats->rx.general.mac_id;
597 data.beacon_filter_average_energy =
598 stats->general.beacon_filter_average_energy;
599
600 iwl_mvm_update_rx_statistics(mvm, &stats->rx);
601 }
602
603 iwl_mvm_rx_stats_check_trigger(mvm, pkt);
604
605 /* Only handle rx statistics temperature changes if async temp
606 * notifications are not supported
607 */
608 if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_ASYNC_DTM))
609 iwl_mvm_tt_temp_changed(mvm, temperature);
610
611 ieee80211_iterate_active_interfaces(mvm->hw,
612 IEEE80211_IFACE_ITER_NORMAL,
613 iwl_mvm_stat_iterator,
614 &data);
615 return;
616 invalid:
617 IWL_ERR(mvm, "received invalid statistics size (%d)!\n",
618 iwl_rx_packet_payload_len(pkt));
619 }
620
621 void iwl_mvm_rx_statistics(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
622 {
623 iwl_mvm_handle_rx_statistics(mvm, rxb_addr(rxb));
624 }
Linux kernel - Deliverables
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