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Merge tag 'wireless-drivers-next-for-davem-2016-05-13' of git://git.kernel.org/pub...
[deliverable/linux.git] / drivers / net / wireless / intel / iwlwifi / mvm / rx.c
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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 ieee80211_sta *sta,
101 struct napi_struct *napi,
102 struct sk_buff *skb,
103 struct ieee80211_hdr *hdr, u16 len,
104 u32 ampdu_status, u8 crypt_len,
105 struct iwl_rx_cmd_buffer *rxb)
106{
107 unsigned int hdrlen, fraglen;
108
109 /* If frame is small enough to fit in skb->head, pull it completely.
110 * If not, only pull ieee80211_hdr (including crypto if present, and
111 * an additional 8 bytes for SNAP/ethertype, see below) so that
112 * splice() or TCP coalesce are more efficient.
113 *
114 * Since, in addition, ieee80211_data_to_8023() always pull in at
115 * least 8 bytes (possibly more for mesh) we can do the same here
116 * to save the cost of doing it later. That still doesn't pull in
117 * the actual IP header since the typical case has a SNAP header.
118 * If the latter changes (there are efforts in the standards group
119 * to do so) we should revisit this and ieee80211_data_to_8023().
120 */
121 hdrlen = (len <= skb_tailroom(skb)) ? len :
122 sizeof(*hdr) + crypt_len + 8;
123
124 memcpy(skb_put(skb, hdrlen), hdr, hdrlen);
125 fraglen = len - hdrlen;
126
127 if (fraglen) {
128 int offset = (void *)hdr + hdrlen -
129 rxb_addr(rxb) + rxb_offset(rxb);
130
131 skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset,
132 fraglen, rxb->truesize);
133 }
134
135 ieee80211_rx_napi(mvm->hw, sta, skb, napi);
136}
137
138/*
139 * iwl_mvm_get_signal_strength - use new rx PHY INFO API
140 * values are reported by the fw as positive values - need to negate
141 * to obtain their dBM. Account for missing antennas by replacing 0
142 * values by -256dBm: practically 0 power and a non-feasible 8 bit value.
143 */
144static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm,
145 struct iwl_rx_phy_info *phy_info,
146 struct ieee80211_rx_status *rx_status)
147{
148 int energy_a, energy_b, energy_c, max_energy;
149 u32 val;
150
151 val =
152 le32_to_cpu(phy_info->non_cfg_phy[IWL_RX_INFO_ENERGY_ANT_ABC_IDX]);
153 energy_a = (val & IWL_RX_INFO_ENERGY_ANT_A_MSK) >>
154 IWL_RX_INFO_ENERGY_ANT_A_POS;
155 energy_a = energy_a ? -energy_a : S8_MIN;
156 energy_b = (val & IWL_RX_INFO_ENERGY_ANT_B_MSK) >>
157 IWL_RX_INFO_ENERGY_ANT_B_POS;
158 energy_b = energy_b ? -energy_b : S8_MIN;
159 energy_c = (val & IWL_RX_INFO_ENERGY_ANT_C_MSK) >>
160 IWL_RX_INFO_ENERGY_ANT_C_POS;
161 energy_c = energy_c ? -energy_c : S8_MIN;
162 max_energy = max(energy_a, energy_b);
163 max_energy = max(max_energy, energy_c);
164
165 IWL_DEBUG_STATS(mvm, "energy In A %d B %d C %d , and max %d\n",
166 energy_a, energy_b, energy_c, max_energy);
167
168 rx_status->signal = max_energy;
169 rx_status->chains = (le16_to_cpu(phy_info->phy_flags) &
170 RX_RES_PHY_FLAGS_ANTENNA)
171 >> RX_RES_PHY_FLAGS_ANTENNA_POS;
172 rx_status->chain_signal[0] = energy_a;
173 rx_status->chain_signal[1] = energy_b;
174 rx_status->chain_signal[2] = energy_c;
175}
176
177/*
178 * iwl_mvm_set_mac80211_rx_flag - translate fw status to mac80211 format
179 * @mvm: the mvm object
180 * @hdr: 80211 header
181 * @stats: status in mac80211's format
182 * @rx_pkt_status: status coming from fw
183 *
184 * returns non 0 value if the packet should be dropped
185 */
186static u32 iwl_mvm_set_mac80211_rx_flag(struct iwl_mvm *mvm,
187 struct ieee80211_hdr *hdr,
188 struct ieee80211_rx_status *stats,
189 u32 rx_pkt_status,
190 u8 *crypt_len)
191{
192 if (!ieee80211_has_protected(hdr->frame_control) ||
193 (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
194 RX_MPDU_RES_STATUS_SEC_NO_ENC)
195 return 0;
196
197 /* packet was encrypted with unknown alg */
198 if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
199 RX_MPDU_RES_STATUS_SEC_ENC_ERR)
200 return 0;
201
202 switch (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) {
203 case RX_MPDU_RES_STATUS_SEC_CCM_ENC:
204 /* alg is CCM: check MIC only */
205 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK))
206 return -1;
207
208 stats->flag |= RX_FLAG_DECRYPTED;
209 *crypt_len = IEEE80211_CCMP_HDR_LEN;
210 return 0;
211
212 case RX_MPDU_RES_STATUS_SEC_TKIP_ENC:
213 /* Don't drop the frame and decrypt it in SW */
214 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_TTAK_OK))
215 return 0;
216 *crypt_len = IEEE80211_TKIP_IV_LEN;
217 /* fall through if TTAK OK */
218
219 case RX_MPDU_RES_STATUS_SEC_WEP_ENC:
220 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_ICV_OK))
221 return -1;
222
223 stats->flag |= RX_FLAG_DECRYPTED;
224 if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
225 RX_MPDU_RES_STATUS_SEC_WEP_ENC)
226 *crypt_len = IEEE80211_WEP_IV_LEN;
227 return 0;
228
229 case RX_MPDU_RES_STATUS_SEC_EXT_ENC:
230 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK))
231 return -1;
232 stats->flag |= RX_FLAG_DECRYPTED;
233 return 0;
234
235 default:
236 IWL_ERR(mvm, "Unhandled alg: 0x%x\n", rx_pkt_status);
237 }
238
239 return 0;
240}
241
242static void iwl_mvm_rx_csum(struct ieee80211_sta *sta,
243 struct sk_buff *skb,
244 u32 status)
245{
246 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
247 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
248
249 if (mvmvif->features & NETIF_F_RXCSUM &&
250 status & RX_MPDU_RES_STATUS_CSUM_DONE &&
251 status & RX_MPDU_RES_STATUS_CSUM_OK)
252 skb->ip_summed = CHECKSUM_UNNECESSARY;
253}
254
255/*
256 * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler
257 *
258 * Handles the actual data of the Rx packet from the fw
259 */
260void iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct napi_struct *napi,
261 struct iwl_rx_cmd_buffer *rxb)
262{
263 struct ieee80211_hdr *hdr;
264 struct ieee80211_rx_status *rx_status;
265 struct iwl_rx_packet *pkt = rxb_addr(rxb);
266 struct iwl_rx_phy_info *phy_info;
267 struct iwl_rx_mpdu_res_start *rx_res;
268 struct ieee80211_sta *sta = NULL;
269 struct sk_buff *skb;
270 u32 len;
271 u32 ampdu_status;
272 u32 rate_n_flags;
273 u32 rx_pkt_status;
274 u8 crypt_len = 0;
275 bool take_ref;
276
277 phy_info = &mvm->last_phy_info;
278 rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data;
279 hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res));
280 len = le16_to_cpu(rx_res->byte_count);
281 rx_pkt_status = le32_to_cpup((__le32 *)
282 (pkt->data + sizeof(*rx_res) + len));
283
284 /* Dont use dev_alloc_skb(), we'll have enough headroom once
285 * ieee80211_hdr pulled.
286 */
287 skb = alloc_skb(128, GFP_ATOMIC);
288 if (!skb) {
289 IWL_ERR(mvm, "alloc_skb failed\n");
290 return;
291 }
292
293 rx_status = IEEE80211_SKB_RXCB(skb);
294
295 /*
296 * drop the packet if it has failed being decrypted by HW
297 */
298 if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, rx_status, rx_pkt_status,
299 &crypt_len)) {
300 IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n",
301 rx_pkt_status);
302 kfree_skb(skb);
303 return;
304 }
305
306 /*
307 * Keep packets with CRC errors (and with overrun) for monitor mode
308 * (otherwise the firmware discards them) but mark them as bad.
309 */
310 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) ||
311 !(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) {
312 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status);
313 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
314 }
315
316 /* This will be used in several places later */
317 rate_n_flags = le32_to_cpu(phy_info->rate_n_flags);
318
319 /* rx_status carries information about the packet to mac80211 */
320 rx_status->mactime = le64_to_cpu(phy_info->timestamp);
321 rx_status->device_timestamp = le32_to_cpu(phy_info->system_timestamp);
322 rx_status->band =
323 (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ?
324 NL80211_BAND_2GHZ : NL80211_BAND_5GHZ;
325 rx_status->freq =
326 ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel),
327 rx_status->band);
328
329 /* TSF as indicated by the firmware is at INA time */
330 rx_status->flag |= RX_FLAG_MACTIME_PLCP_START;
331
332 iwl_mvm_get_signal_strength(mvm, phy_info, rx_status);
333
334 IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status->signal,
335 (unsigned long long)rx_status->mactime);
336
337 rcu_read_lock();
338 if (rx_pkt_status & RX_MPDU_RES_STATUS_SRC_STA_FOUND) {
339 u32 id = rx_pkt_status & RX_MPDU_RES_STATUS_STA_ID_MSK;
340
341 id >>= RX_MDPU_RES_STATUS_STA_ID_SHIFT;
342
343 if (!WARN_ON_ONCE(id >= IWL_MVM_STATION_COUNT)) {
344 sta = rcu_dereference(mvm->fw_id_to_mac_id[id]);
345 if (IS_ERR(sta))
346 sta = NULL;
347 }
348 } else if (!is_multicast_ether_addr(hdr->addr2)) {
349 /* This is fine since we prevent two stations with the same
350 * address from being added.
351 */
352 sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL);
353 }
354
355 if (sta) {
356 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
357
358 /* We have tx blocked stations (with CS bit). If we heard
359 * frames from a blocked station on a new channel we can
360 * TX to it again.
361 */
362 if (unlikely(mvm->csa_tx_block_bcn_timeout))
363 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, false);
364
365 rs_update_last_rssi(mvm, &mvmsta->lq_sta, rx_status);
366
367 if (iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_RSSI) &&
368 ieee80211_is_beacon(hdr->frame_control)) {
369 struct iwl_fw_dbg_trigger_tlv *trig;
370 struct iwl_fw_dbg_trigger_low_rssi *rssi_trig;
371 bool trig_check;
372 s32 rssi;
373
374 trig = iwl_fw_dbg_get_trigger(mvm->fw,
375 FW_DBG_TRIGGER_RSSI);
376 rssi_trig = (void *)trig->data;
377 rssi = le32_to_cpu(rssi_trig->rssi);
378
379 trig_check =
380 iwl_fw_dbg_trigger_check_stop(mvm, mvmsta->vif,
381 trig);
382 if (trig_check && rx_status->signal < rssi)
383 iwl_mvm_fw_dbg_collect_trig(mvm, trig, NULL);
384 }
385
386 if (ieee80211_is_data(hdr->frame_control))
387 iwl_mvm_rx_csum(sta, skb, rx_pkt_status);
388 }
389 rcu_read_unlock();
390
391 /* set the preamble flag if appropriate */
392 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE))
393 rx_status->flag |= RX_FLAG_SHORTPRE;
394
395 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) {
396 /*
397 * We know which subframes of an A-MPDU belong
398 * together since we get a single PHY response
399 * from the firmware for all of them
400 */
401 rx_status->flag |= RX_FLAG_AMPDU_DETAILS;
402 rx_status->ampdu_reference = mvm->ampdu_ref;
403 }
404
405 /* Set up the HT phy flags */
406 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
407 case RATE_MCS_CHAN_WIDTH_20:
408 break;
409 case RATE_MCS_CHAN_WIDTH_40:
410 rx_status->flag |= RX_FLAG_40MHZ;
411 break;
412 case RATE_MCS_CHAN_WIDTH_80:
413 rx_status->vht_flag |= RX_VHT_FLAG_80MHZ;
414 break;
415 case RATE_MCS_CHAN_WIDTH_160:
416 rx_status->vht_flag |= RX_VHT_FLAG_160MHZ;
417 break;
418 }
419 if (rate_n_flags & RATE_MCS_SGI_MSK)
420 rx_status->flag |= RX_FLAG_SHORT_GI;
421 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
422 rx_status->flag |= RX_FLAG_HT_GF;
423 if (rate_n_flags & RATE_MCS_LDPC_MSK)
424 rx_status->flag |= RX_FLAG_LDPC;
425 if (rate_n_flags & RATE_MCS_HT_MSK) {
426 u8 stbc = (rate_n_flags & RATE_MCS_HT_STBC_MSK) >>
427 RATE_MCS_STBC_POS;
428 rx_status->flag |= RX_FLAG_HT;
429 rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
430 rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT;
431 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
432 u8 stbc = (rate_n_flags & RATE_MCS_VHT_STBC_MSK) >>
433 RATE_MCS_STBC_POS;
434 rx_status->vht_nss =
435 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
436 RATE_VHT_MCS_NSS_POS) + 1;
437 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;
438 rx_status->flag |= RX_FLAG_VHT;
439 rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT;
440 if (rate_n_flags & RATE_MCS_BF_MSK)
441 rx_status->vht_flag |= RX_VHT_FLAG_BF;
442 } else {
443 rx_status->rate_idx =
444 iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
445 rx_status->band);
446 }
447
448#ifdef CONFIG_IWLWIFI_DEBUGFS
449 iwl_mvm_update_frame_stats(mvm, rate_n_flags,
450 rx_status->flag & RX_FLAG_AMPDU_DETAILS);
451#endif
452
453 if (unlikely((ieee80211_is_beacon(hdr->frame_control) ||
454 ieee80211_is_probe_resp(hdr->frame_control)) &&
455 mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED))
456 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND;
457
458 if (unlikely(ieee80211_is_beacon(hdr->frame_control) ||
459 ieee80211_is_probe_resp(hdr->frame_control)))
460 rx_status->boottime_ns = ktime_get_boot_ns();
461
462 /* Take a reference briefly to kick off a d0i3 entry delay so
463 * we can handle bursts of RX packets without toggling the
464 * state too often. But don't do this for beacons if we are
465 * going to idle because the beacon filtering changes we make
466 * cause the firmware to send us collateral beacons. */
467 take_ref = !(test_bit(STATUS_TRANS_GOING_IDLE, &mvm->trans->status) &&
468 ieee80211_is_beacon(hdr->frame_control));
469
470 if (take_ref)
471 iwl_mvm_ref(mvm, IWL_MVM_REF_RX);
472
473 iwl_mvm_pass_packet_to_mac80211(mvm, sta, napi, skb, hdr, len,
474 ampdu_status, crypt_len, rxb);
475
476 if (take_ref)
477 iwl_mvm_unref(mvm, IWL_MVM_REF_RX);
478}
479
480static void iwl_mvm_update_rx_statistics(struct iwl_mvm *mvm,
481 struct mvm_statistics_rx *rx_stats)
482{
483 lockdep_assert_held(&mvm->mutex);
484
485 mvm->rx_stats = *rx_stats;
486}
487
488struct iwl_mvm_stat_data {
489 struct iwl_mvm *mvm;
490 __le32 mac_id;
491 u8 beacon_filter_average_energy;
492 struct mvm_statistics_general_v8 *general;
493};
494
495static void iwl_mvm_stat_iterator(void *_data, u8 *mac,
496 struct ieee80211_vif *vif)
497{
498 struct iwl_mvm_stat_data *data = _data;
499 struct iwl_mvm *mvm = data->mvm;
500 int sig = -data->beacon_filter_average_energy;
501 int last_event;
502 int thold = vif->bss_conf.cqm_rssi_thold;
503 int hyst = vif->bss_conf.cqm_rssi_hyst;
504 u16 id = le32_to_cpu(data->mac_id);
505 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
506
507 /* This doesn't need the MAC ID check since it's not taking the
508 * data copied into the "data" struct, but rather the data from
509 * the notification directly.
510 */
511 if (data->general) {
512 mvmvif->beacon_stats.num_beacons =
513 le32_to_cpu(data->general->beacon_counter[mvmvif->id]);
514 mvmvif->beacon_stats.avg_signal =
515 -data->general->beacon_average_energy[mvmvif->id];
516 }
517
518 if (mvmvif->id != id)
519 return;
520
521 if (vif->type != NL80211_IFTYPE_STATION)
522 return;
523
524 if (sig == 0) {
525 IWL_DEBUG_RX(mvm, "RSSI is 0 - skip signal based decision\n");
526 return;
527 }
528
529 mvmvif->bf_data.ave_beacon_signal = sig;
530
531 /* BT Coex */
532 if (mvmvif->bf_data.bt_coex_min_thold !=
533 mvmvif->bf_data.bt_coex_max_thold) {
534 last_event = mvmvif->bf_data.last_bt_coex_event;
535 if (sig > mvmvif->bf_data.bt_coex_max_thold &&
536 (last_event <= mvmvif->bf_data.bt_coex_min_thold ||
537 last_event == 0)) {
538 mvmvif->bf_data.last_bt_coex_event = sig;
539 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex high %d\n",
540 sig);
541 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_HIGH);
542 } else if (sig < mvmvif->bf_data.bt_coex_min_thold &&
543 (last_event >= mvmvif->bf_data.bt_coex_max_thold ||
544 last_event == 0)) {
545 mvmvif->bf_data.last_bt_coex_event = sig;
546 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex low %d\n",
547 sig);
548 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_LOW);
549 }
550 }
551
552 if (!(vif->driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI))
553 return;
554
555 /* CQM Notification */
556 last_event = mvmvif->bf_data.last_cqm_event;
557 if (thold && sig < thold && (last_event == 0 ||
558 sig < last_event - hyst)) {
559 mvmvif->bf_data.last_cqm_event = sig;
560 IWL_DEBUG_RX(mvm, "cqm_iterator cqm low %d\n",
561 sig);
562 ieee80211_cqm_rssi_notify(
563 vif,
564 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
565 GFP_KERNEL);
566 } else if (sig > thold &&
567 (last_event == 0 || sig > last_event + hyst)) {
568 mvmvif->bf_data.last_cqm_event = sig;
569 IWL_DEBUG_RX(mvm, "cqm_iterator cqm high %d\n",
570 sig);
571 ieee80211_cqm_rssi_notify(
572 vif,
573 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
574 GFP_KERNEL);
575 }
576}
577
578static inline void
579iwl_mvm_rx_stats_check_trigger(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt)
580{
581 struct iwl_fw_dbg_trigger_tlv *trig;
582 struct iwl_fw_dbg_trigger_stats *trig_stats;
583 u32 trig_offset, trig_thold;
584
585 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_STATS))
586 return;
587
588 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_STATS);
589 trig_stats = (void *)trig->data;
590
591 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
592 return;
593
594 trig_offset = le32_to_cpu(trig_stats->stop_offset);
595 trig_thold = le32_to_cpu(trig_stats->stop_threshold);
596
597 if (WARN_ON_ONCE(trig_offset >= iwl_rx_packet_payload_len(pkt)))
598 return;
599
600 if (le32_to_cpup((__le32 *) (pkt->data + trig_offset)) < trig_thold)
601 return;
602
603 iwl_mvm_fw_dbg_collect_trig(mvm, trig, NULL);
604}
605
606void iwl_mvm_handle_rx_statistics(struct iwl_mvm *mvm,
607 struct iwl_rx_packet *pkt)
608{
609 struct iwl_notif_statistics_v10 *stats = (void *)&pkt->data;
610 struct iwl_mvm_stat_data data = {
611 .mvm = mvm,
612 };
613 u32 temperature;
614
615 if (iwl_rx_packet_payload_len(pkt) != sizeof(*stats))
616 goto invalid;
617
618 temperature = le32_to_cpu(stats->general.radio_temperature);
619 data.mac_id = stats->rx.general.mac_id;
620 data.beacon_filter_average_energy =
621 stats->general.beacon_filter_average_energy;
622
623 iwl_mvm_update_rx_statistics(mvm, &stats->rx);
624
625 mvm->radio_stats.rx_time = le64_to_cpu(stats->general.rx_time);
626 mvm->radio_stats.tx_time = le64_to_cpu(stats->general.tx_time);
627 mvm->radio_stats.on_time_rf =
628 le64_to_cpu(stats->general.on_time_rf);
629 mvm->radio_stats.on_time_scan =
630 le64_to_cpu(stats->general.on_time_scan);
631
632 data.general = &stats->general;
633
634 iwl_mvm_rx_stats_check_trigger(mvm, pkt);
635
636 ieee80211_iterate_active_interfaces(mvm->hw,
637 IEEE80211_IFACE_ITER_NORMAL,
638 iwl_mvm_stat_iterator,
639 &data);
640 return;
641 invalid:
642 IWL_ERR(mvm, "received invalid statistics size (%d)!\n",
643 iwl_rx_packet_payload_len(pkt));
644}
645
646void iwl_mvm_rx_statistics(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
647{
648 iwl_mvm_handle_rx_statistics(mvm, rxb_addr(rxb));
649}
650
651void iwl_mvm_window_status_notif(struct iwl_mvm *mvm,
652 struct iwl_rx_cmd_buffer *rxb)
653{
654 struct iwl_rx_packet *pkt = rxb_addr(rxb);
655 struct iwl_ba_window_status_notif *notif = (void *)pkt->data;
656 int i;
657 u32 pkt_len = iwl_rx_packet_payload_len(pkt);
658
659 if (WARN_ONCE(pkt_len != sizeof(*notif),
660 "Received window status notification of wrong size (%u)\n",
661 pkt_len))
662 return;
663
664 rcu_read_lock();
665 for (i = 0; i < BA_WINDOW_STREAMS_MAX; i++) {
666 struct ieee80211_sta *sta;
667 u8 sta_id, tid;
668 u64 bitmap;
669 u32 ssn;
670 u16 ratid;
671 u16 received_mpdu;
672
673 ratid = le16_to_cpu(notif->ra_tid[i]);
674 /* check that this TID is valid */
675 if (!(ratid & BA_WINDOW_STATUS_VALID_MSK))
676 continue;
677
678 received_mpdu = le16_to_cpu(notif->mpdu_rx_count[i]);
679 if (received_mpdu == 0)
680 continue;
681
682 tid = ratid & BA_WINDOW_STATUS_TID_MSK;
683 /* get the station */
684 sta_id = (ratid & BA_WINDOW_STATUS_STA_ID_MSK)
685 >> BA_WINDOW_STATUS_STA_ID_POS;
686 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
687 if (IS_ERR_OR_NULL(sta))
688 continue;
689 bitmap = le64_to_cpu(notif->bitmap[i]);
690 ssn = le32_to_cpu(notif->start_seq_num[i]);
691
692 /* update mac80211 with the bitmap for the reordering buffer */
693 ieee80211_mark_rx_ba_filtered_frames(sta, tid, ssn, bitmap,
694 received_mpdu);
695 }
696 rcu_read_unlock();
697}
Linux kernel - Deliverables
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