projects / deliverable / linux.git / blob
? search:


b620142953b666b8207e67c78500c4288772f872
[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 <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 */
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 */
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 */
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 */
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 IWL_DEBUG_WEP(mvm, "hw decrypted CCMP successfully\n");
206 *crypt_len = IEEE80211_CCMP_HDR_LEN;
207 return 0;
208
209 case RX_MPDU_RES_STATUS_SEC_TKIP_ENC:
210 /* Don't drop the frame and decrypt it in SW */
211 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_TTAK_OK))
212 return 0;
213 *crypt_len = IEEE80211_TKIP_IV_LEN;
214 /* fall through if TTAK OK */
215
216 case RX_MPDU_RES_STATUS_SEC_WEP_ENC:
217 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_ICV_OK))
218 return -1;
219
220 stats->flag |= RX_FLAG_DECRYPTED;
221 if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
222 RX_MPDU_RES_STATUS_SEC_WEP_ENC)
223 *crypt_len = IEEE80211_WEP_IV_LEN;
224 return 0;
225
226 case RX_MPDU_RES_STATUS_SEC_EXT_ENC:
227 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK))
228 return -1;
229 stats->flag |= RX_FLAG_DECRYPTED;
230 return 0;
231
232 default:
233 IWL_ERR(mvm, "Unhandled alg: 0x%x\n", rx_pkt_status);
234 }
235
236 return 0;
237 }
238
239 static void iwl_mvm_rx_csum(struct ieee80211_sta *sta,
240 struct sk_buff *skb,
241 u32 status)
242 {
243 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
244 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
245
246 if (mvmvif->features & NETIF_F_RXCSUM &&
247 status & RX_MPDU_RES_STATUS_CSUM_DONE &&
248 status & RX_MPDU_RES_STATUS_CSUM_OK)
249 skb->ip_summed = CHECKSUM_UNNECESSARY;
250 }
251
252 /*
253 * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler
254 *
255 * Handles the actual data of the Rx packet from the fw
256 */
257 void iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct napi_struct *napi,
258 struct iwl_rx_cmd_buffer *rxb)
259 {
260 struct ieee80211_hdr *hdr;
261 struct ieee80211_rx_status *rx_status;
262 struct iwl_rx_packet *pkt = rxb_addr(rxb);
263 struct iwl_rx_phy_info *phy_info;
264 struct iwl_rx_mpdu_res_start *rx_res;
265 struct ieee80211_sta *sta;
266 struct sk_buff *skb;
267 u32 len;
268 u32 ampdu_status;
269 u32 rate_n_flags;
270 u32 rx_pkt_status;
271 u8 crypt_len = 0;
272
273 phy_info = &mvm->last_phy_info;
274 rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data;
275 hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res));
276 len = le16_to_cpu(rx_res->byte_count);
277 rx_pkt_status = le32_to_cpup((__le32 *)
278 (pkt->data + sizeof(*rx_res) + len));
279
280 /* Dont use dev_alloc_skb(), we'll have enough headroom once
281 * ieee80211_hdr pulled.
282 */
283 skb = alloc_skb(128, GFP_ATOMIC);
284 if (!skb) {
285 IWL_ERR(mvm, "alloc_skb failed\n");
286 return;
287 }
288
289 rx_status = IEEE80211_SKB_RXCB(skb);
290
291 /*
292 * drop the packet if it has failed being decrypted by HW
293 */
294 if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, rx_status, rx_pkt_status,
295 &crypt_len)) {
296 IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n",
297 rx_pkt_status);
298 kfree_skb(skb);
299 return;
300 }
301
302 if ((unlikely(phy_info->cfg_phy_cnt > 20))) {
303 IWL_DEBUG_DROP(mvm, "dsp size out of range [0,20]: %d\n",
304 phy_info->cfg_phy_cnt);
305 kfree_skb(skb);
306 return;
307 }
308
309 /*
310 * Keep packets with CRC errors (and with overrun) for monitor mode
311 * (otherwise the firmware discards them) but mark them as bad.
312 */
313 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) ||
314 !(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) {
315 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status);
316 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
317 }
318
319 /* This will be used in several places later */
320 rate_n_flags = le32_to_cpu(phy_info->rate_n_flags);
321
322 /* rx_status carries information about the packet to mac80211 */
323 rx_status->mactime = le64_to_cpu(phy_info->timestamp);
324 rx_status->device_timestamp = le32_to_cpu(phy_info->system_timestamp);
325 rx_status->band =
326 (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ?
327 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
328 rx_status->freq =
329 ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel),
330 rx_status->band);
331 /*
332 * TSF as indicated by the fw is at INA time, but mac80211 expects the
333 * TSF at the beginning of the MPDU.
334 */
335 /*rx_status->flag |= RX_FLAG_MACTIME_MPDU;*/
336
337 iwl_mvm_get_signal_strength(mvm, phy_info, rx_status);
338
339 IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status->signal,
340 (unsigned long long)rx_status->mactime);
341
342 rcu_read_lock();
343 /*
344 * We have tx blocked stations (with CS bit). If we heard frames from
345 * a blocked station on a new channel we can TX to it again.
346 */
347 if (unlikely(mvm->csa_tx_block_bcn_timeout)) {
348 sta = ieee80211_find_sta(
349 rcu_dereference(mvm->csa_tx_blocked_vif), hdr->addr2);
350 if (sta)
351 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, false);
352 }
353
354 /* This is fine since we don't support multiple AP interfaces */
355 sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL);
356 if (sta) {
357 struct iwl_mvm_sta *mvmsta;
358 mvmsta = iwl_mvm_sta_from_mac80211(sta);
359 rs_update_last_rssi(mvm, &mvmsta->lq_sta, rx_status);
360
361 if (iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_RSSI) &&
362 ieee80211_is_beacon(hdr->frame_control)) {
363 struct iwl_fw_dbg_trigger_tlv *trig;
364 struct iwl_fw_dbg_trigger_low_rssi *rssi_trig;
365 bool trig_check;
366 s32 rssi;
367
368 trig = iwl_fw_dbg_get_trigger(mvm->fw,
369 FW_DBG_TRIGGER_RSSI);
370 rssi_trig = (void *)trig->data;
371 rssi = le32_to_cpu(rssi_trig->rssi);
372
373 trig_check =
374 iwl_fw_dbg_trigger_check_stop(mvm, mvmsta->vif,
375 trig);
376 if (trig_check && rx_status->signal < rssi)
377 iwl_mvm_fw_dbg_collect_trig(mvm, trig, NULL);
378 }
379 }
380
381 if (sta && ieee80211_is_data(hdr->frame_control))
382 iwl_mvm_rx_csum(sta, skb, rx_pkt_status);
383
384 rcu_read_unlock();
385
386 /* set the preamble flag if appropriate */
387 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE))
388 rx_status->flag |= RX_FLAG_SHORTPRE;
389
390 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) {
391 /*
392 * We know which subframes of an A-MPDU belong
393 * together since we get a single PHY response
394 * from the firmware for all of them
395 */
396 rx_status->flag |= RX_FLAG_AMPDU_DETAILS;
397 rx_status->ampdu_reference = mvm->ampdu_ref;
398 }
399
400 /* Set up the HT phy flags */
401 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
402 case RATE_MCS_CHAN_WIDTH_20:
403 break;
404 case RATE_MCS_CHAN_WIDTH_40:
405 rx_status->flag |= RX_FLAG_40MHZ;
406 break;
407 case RATE_MCS_CHAN_WIDTH_80:
408 rx_status->vht_flag |= RX_VHT_FLAG_80MHZ;
409 break;
410 case RATE_MCS_CHAN_WIDTH_160:
411 rx_status->vht_flag |= RX_VHT_FLAG_160MHZ;
412 break;
413 }
414 if (rate_n_flags & RATE_MCS_SGI_MSK)
415 rx_status->flag |= RX_FLAG_SHORT_GI;
416 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
417 rx_status->flag |= RX_FLAG_HT_GF;
418 if (rate_n_flags & RATE_MCS_LDPC_MSK)
419 rx_status->flag |= RX_FLAG_LDPC;
420 if (rate_n_flags & RATE_MCS_HT_MSK) {
421 u8 stbc = (rate_n_flags & RATE_MCS_HT_STBC_MSK) >>
422 RATE_MCS_STBC_POS;
423 rx_status->flag |= RX_FLAG_HT;
424 rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
425 rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT;
426 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
427 u8 stbc = (rate_n_flags & RATE_MCS_VHT_STBC_MSK) >>
428 RATE_MCS_STBC_POS;
429 rx_status->vht_nss =
430 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
431 RATE_VHT_MCS_NSS_POS) + 1;
432 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;
433 rx_status->flag |= RX_FLAG_VHT;
434 rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT;
435 if (rate_n_flags & RATE_MCS_BF_MSK)
436 rx_status->vht_flag |= RX_VHT_FLAG_BF;
437 } else {
438 rx_status->rate_idx =
439 iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
440 rx_status->band);
441 }
442
443 #ifdef CONFIG_IWLWIFI_DEBUGFS
444 iwl_mvm_update_frame_stats(mvm, rate_n_flags,
445 rx_status->flag & RX_FLAG_AMPDU_DETAILS);
446 #endif
447 iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb, hdr, len, ampdu_status,
448 crypt_len, rxb);
449 }
450
451 static void iwl_mvm_update_rx_statistics(struct iwl_mvm *mvm,
452 struct mvm_statistics_rx *rx_stats)
453 {
454 lockdep_assert_held(&mvm->mutex);
455
456 mvm->rx_stats = *rx_stats;
457 }
458
459 struct iwl_mvm_stat_data {
460 struct iwl_mvm *mvm;
461 __le32 mac_id;
462 u8 beacon_filter_average_energy;
463 struct mvm_statistics_general_v8 *general;
464 };
465
466 static void iwl_mvm_stat_iterator(void *_data, u8 *mac,
467 struct ieee80211_vif *vif)
468 {
469 struct iwl_mvm_stat_data *data = _data;
470 struct iwl_mvm *mvm = data->mvm;
471 int sig = -data->beacon_filter_average_energy;
472 int last_event;
473 int thold = vif->bss_conf.cqm_rssi_thold;
474 int hyst = vif->bss_conf.cqm_rssi_hyst;
475 u16 id = le32_to_cpu(data->mac_id);
476 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
477
478 /* This doesn't need the MAC ID check since it's not taking the
479 * data copied into the "data" struct, but rather the data from
480 * the notification directly.
481 */
482 if (data->general) {
483 mvmvif->beacon_stats.num_beacons =
484 le32_to_cpu(data->general->beacon_counter[mvmvif->id]);
485 mvmvif->beacon_stats.avg_signal =
486 -data->general->beacon_average_energy[mvmvif->id];
487 }
488
489 if (mvmvif->id != id)
490 return;
491
492 if (vif->type != NL80211_IFTYPE_STATION)
493 return;
494
495 if (sig == 0) {
496 IWL_DEBUG_RX(mvm, "RSSI is 0 - skip signal based decision\n");
497 return;
498 }
499
500 mvmvif->bf_data.ave_beacon_signal = sig;
501
502 /* BT Coex */
503 if (mvmvif->bf_data.bt_coex_min_thold !=
504 mvmvif->bf_data.bt_coex_max_thold) {
505 last_event = mvmvif->bf_data.last_bt_coex_event;
506 if (sig > mvmvif->bf_data.bt_coex_max_thold &&
507 (last_event <= mvmvif->bf_data.bt_coex_min_thold ||
508 last_event == 0)) {
509 mvmvif->bf_data.last_bt_coex_event = sig;
510 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex high %d\n",
511 sig);
512 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_HIGH);
513 } else if (sig < mvmvif->bf_data.bt_coex_min_thold &&
514 (last_event >= mvmvif->bf_data.bt_coex_max_thold ||
515 last_event == 0)) {
516 mvmvif->bf_data.last_bt_coex_event = sig;
517 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex low %d\n",
518 sig);
519 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_LOW);
520 }
521 }
522
523 if (!(vif->driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI))
524 return;
525
526 /* CQM Notification */
527 last_event = mvmvif->bf_data.last_cqm_event;
528 if (thold && sig < thold && (last_event == 0 ||
529 sig < last_event - hyst)) {
530 mvmvif->bf_data.last_cqm_event = sig;
531 IWL_DEBUG_RX(mvm, "cqm_iterator cqm low %d\n",
532 sig);
533 ieee80211_cqm_rssi_notify(
534 vif,
535 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
536 GFP_KERNEL);
537 } else if (sig > thold &&
538 (last_event == 0 || sig > last_event + hyst)) {
539 mvmvif->bf_data.last_cqm_event = sig;
540 IWL_DEBUG_RX(mvm, "cqm_iterator cqm high %d\n",
541 sig);
542 ieee80211_cqm_rssi_notify(
543 vif,
544 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
545 GFP_KERNEL);
546 }
547 }
548
549 static inline void
550 iwl_mvm_rx_stats_check_trigger(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt)
551 {
552 struct iwl_fw_dbg_trigger_tlv *trig;
553 struct iwl_fw_dbg_trigger_stats *trig_stats;
554 u32 trig_offset, trig_thold;
555
556 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_STATS))
557 return;
558
559 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_STATS);
560 trig_stats = (void *)trig->data;
561
562 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
563 return;
564
565 trig_offset = le32_to_cpu(trig_stats->stop_offset);
566 trig_thold = le32_to_cpu(trig_stats->stop_threshold);
567
568 if (WARN_ON_ONCE(trig_offset >= iwl_rx_packet_payload_len(pkt)))
569 return;
570
571 if (le32_to_cpup((__le32 *) (pkt->data + trig_offset)) < trig_thold)
572 return;
573
574 iwl_mvm_fw_dbg_collect_trig(mvm, trig, NULL);
575 }
576
577 void iwl_mvm_handle_rx_statistics(struct iwl_mvm *mvm,
578 struct iwl_rx_packet *pkt)
579 {
580 size_t v8_len = sizeof(struct iwl_notif_statistics_v8);
581 size_t v10_len = sizeof(struct iwl_notif_statistics_v10);
582 struct iwl_mvm_stat_data data = {
583 .mvm = mvm,
584 };
585 u32 temperature;
586
587 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STATS_V10)) {
588 struct iwl_notif_statistics_v10 *stats = (void *)&pkt->data;
589
590 if (iwl_rx_packet_payload_len(pkt) != v10_len)
591 goto invalid;
592
593 temperature = le32_to_cpu(stats->general.radio_temperature);
594 data.mac_id = stats->rx.general.mac_id;
595 data.beacon_filter_average_energy =
596 stats->general.beacon_filter_average_energy;
597
598 iwl_mvm_update_rx_statistics(mvm, &stats->rx);
599
600 mvm->radio_stats.rx_time = le64_to_cpu(stats->general.rx_time);
601 mvm->radio_stats.tx_time = le64_to_cpu(stats->general.tx_time);
602 mvm->radio_stats.on_time_rf =
603 le64_to_cpu(stats->general.on_time_rf);
604 mvm->radio_stats.on_time_scan =
605 le64_to_cpu(stats->general.on_time_scan);
606
607 data.general = &stats->general;
608 } else {
609 struct iwl_notif_statistics_v8 *stats = (void *)&pkt->data;
610
611 if (iwl_rx_packet_payload_len(pkt) != v8_len)
612 goto invalid;
613
614 temperature = le32_to_cpu(stats->general.radio_temperature);
615 data.mac_id = stats->rx.general.mac_id;
616 data.beacon_filter_average_energy =
617 stats->general.beacon_filter_average_energy;
618
619 iwl_mvm_update_rx_statistics(mvm, &stats->rx);
620 }
621
622 iwl_mvm_rx_stats_check_trigger(mvm, pkt);
623
624 ieee80211_iterate_active_interfaces(mvm->hw,
625 IEEE80211_IFACE_ITER_NORMAL,
626 iwl_mvm_stat_iterator,
627 &data);
628 return;
629 invalid:
630 IWL_ERR(mvm, "received invalid statistics size (%d)!\n",
631 iwl_rx_packet_payload_len(pkt));
632 }
633
634 void iwl_mvm_rx_statistics(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
635 {
636 iwl_mvm_handle_rx_statistics(mvm, rxb_addr(rxb));
637 }
Linux kernel - Deliverables
This page took 0.051726 seconds and 4 git commands to generate.