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1// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2/*
3 * Copyright (C) 2012-2014, 2018-2022 Intel Corporation
4 * Copyright (C) 2013-2014 Intel Mobile Communications GmbH
5 * Copyright (C) 2015-2017 Intel Deutschland GmbH
6 */
7#include <net/mac80211.h>
8
9#include "iwl-debug.h"
10#include "iwl-io.h"
11#include "iwl-prph.h"
12#include "iwl-csr.h"
13#include "mvm.h"
14#include "fw/api/rs.h"
15#include "fw/img.h"
16
17/*
18 * Will return 0 even if the cmd failed when RFKILL is asserted unless
19 * CMD_WANT_SKB is set in cmd->flags.
20 */
21int iwl_mvm_send_cmd(struct iwl_mvm *mvm, struct iwl_host_cmd *cmd)
22{
23 int ret;
24
25#if defined(CONFIG_IWLWIFI_DEBUGFS) && defined(CONFIG_PM_SLEEP)
26 if (WARN_ON(mvm->d3_test_active))
27 return -EIO;
28#endif
29
30 /*
31 * Synchronous commands from this op-mode must hold
32 * the mutex, this ensures we don't try to send two
33 * (or more) synchronous commands at a time.
34 */
35 if (!(cmd->flags & CMD_ASYNC))
36 lockdep_assert_held(&mvm->mutex);
37
38 ret = iwl_trans_send_cmd(mvm->trans, cmd);
39
40 /*
41 * If the caller wants the SKB, then don't hide any problems, the
42 * caller might access the response buffer which will be NULL if
43 * the command failed.
44 */
45 if (cmd->flags & CMD_WANT_SKB)
46 return ret;
47
48 /*
49 * Silently ignore failures if RFKILL is asserted or
50 * we are in suspend\resume process
51 */
52 if (!ret || ret == -ERFKILL || ret == -EHOSTDOWN)
53 return 0;
54 return ret;
55}
56
57int iwl_mvm_send_cmd_pdu(struct iwl_mvm *mvm, u32 id,
58 u32 flags, u16 len, const void *data)
59{
60 struct iwl_host_cmd cmd = {
61 .id = id,
62 .len = { len, },
63 .data = { data, },
64 .flags = flags,
65 };
66
67 return iwl_mvm_send_cmd(mvm, &cmd);
68}
69
70/*
71 * We assume that the caller set the status to the success value
72 */
73int iwl_mvm_send_cmd_status(struct iwl_mvm *mvm, struct iwl_host_cmd *cmd,
74 u32 *status)
75{
76 struct iwl_rx_packet *pkt;
77 struct iwl_cmd_response *resp;
78 int ret, resp_len;
79
80 lockdep_assert_held(&mvm->mutex);
81
82#if defined(CONFIG_IWLWIFI_DEBUGFS) && defined(CONFIG_PM_SLEEP)
83 if (WARN_ON(mvm->d3_test_active))
84 return -EIO;
85#endif
86
87 /*
88 * Only synchronous commands can wait for status,
89 * we use WANT_SKB so the caller can't.
90 */
91 if (WARN_ONCE(cmd->flags & (CMD_ASYNC | CMD_WANT_SKB),
92 "cmd flags %x", cmd->flags))
93 return -EINVAL;
94
95 cmd->flags |= CMD_WANT_SKB;
96
97 ret = iwl_trans_send_cmd(mvm->trans, cmd);
98 if (ret == -ERFKILL) {
99 /*
100 * The command failed because of RFKILL, don't update
101 * the status, leave it as success and return 0.
102 */
103 return 0;
104 } else if (ret) {
105 return ret;
106 }
107
108 pkt = cmd->resp_pkt;
109
110 resp_len = iwl_rx_packet_payload_len(pkt);
111 if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
112 ret = -EIO;
113 goto out_free_resp;
114 }
115
116 resp = (void *)pkt->data;
117 *status = le32_to_cpu(resp->status);
118 out_free_resp:
119 iwl_free_resp(cmd);
120 return ret;
121}
122
123/*
124 * We assume that the caller set the status to the sucess value
125 */
126int iwl_mvm_send_cmd_pdu_status(struct iwl_mvm *mvm, u32 id, u16 len,
127 const void *data, u32 *status)
128{
129 struct iwl_host_cmd cmd = {
130 .id = id,
131 .len = { len, },
132 .data = { data, },
133 };
134
135 return iwl_mvm_send_cmd_status(mvm, &cmd, status);
136}
137
138int iwl_mvm_legacy_hw_idx_to_mac80211_idx(u32 rate_n_flags,
139 enum nl80211_band band)
140{
141 int format = rate_n_flags & RATE_MCS_MOD_TYPE_MSK;
142 int rate = rate_n_flags & RATE_LEGACY_RATE_MSK;
143 bool is_LB = band == NL80211_BAND_2GHZ;
144
145 if (format == RATE_MCS_LEGACY_OFDM_MSK)
146 return is_LB ? rate + IWL_FIRST_OFDM_RATE :
147 rate;
148
149 /* CCK is not allowed in HB */
150 return is_LB ? rate : -1;
151}
152
153int iwl_mvm_legacy_rate_to_mac80211_idx(u32 rate_n_flags,
154 enum nl80211_band band)
155{
156 int rate = rate_n_flags & RATE_LEGACY_RATE_MSK_V1;
157 int idx;
158 int band_offset = 0;
159
160 /* Legacy rate format, search for match in table */
161 if (band != NL80211_BAND_2GHZ)
162 band_offset = IWL_FIRST_OFDM_RATE;
163 for (idx = band_offset; idx < IWL_RATE_COUNT_LEGACY; idx++)
164 if (iwl_fw_rate_idx_to_plcp(idx) == rate)
165 return idx - band_offset;
166
167 return -1;
168}
169
170u8 iwl_mvm_mac80211_idx_to_hwrate(const struct iwl_fw *fw, int rate_idx)
171{
172 if (iwl_fw_lookup_cmd_ver(fw, TX_CMD, 0) > 8)
173 /* In the new rate legacy rates are indexed:
174 * 0 - 3 for CCK and 0 - 7 for OFDM.
175 */
176 return (rate_idx >= IWL_FIRST_OFDM_RATE ?
177 rate_idx - IWL_FIRST_OFDM_RATE :
178 rate_idx);
179
180 return iwl_fw_rate_idx_to_plcp(rate_idx);
181}
182
183u8 iwl_mvm_mac80211_ac_to_ucode_ac(enum ieee80211_ac_numbers ac)
184{
185 static const u8 mac80211_ac_to_ucode_ac[] = {
186 AC_VO,
187 AC_VI,
188 AC_BE,
189 AC_BK
190 };
191
192 return mac80211_ac_to_ucode_ac[ac];
193}
194
195void iwl_mvm_rx_fw_error(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
196{
197 struct iwl_rx_packet *pkt = rxb_addr(rxb);
198 struct iwl_error_resp *err_resp = (void *)pkt->data;
199
200 IWL_ERR(mvm, "FW Error notification: type 0x%08X cmd_id 0x%02X\n",
201 le32_to_cpu(err_resp->error_type), err_resp->cmd_id);
202 IWL_ERR(mvm, "FW Error notification: seq 0x%04X service 0x%08X\n",
203 le16_to_cpu(err_resp->bad_cmd_seq_num),
204 le32_to_cpu(err_resp->error_service));
205 IWL_ERR(mvm, "FW Error notification: timestamp 0x%016llX\n",
206 le64_to_cpu(err_resp->timestamp));
207}
208
209/*
210 * Returns the first antenna as ANT_[ABC], as defined in iwl-config.h.
211 * The parameter should also be a combination of ANT_[ABC].
212 */
213u8 first_antenna(u8 mask)
214{
215 BUILD_BUG_ON(ANT_A != BIT(0)); /* using ffs is wrong if not */
216 if (WARN_ON_ONCE(!mask)) /* ffs will return 0 if mask is zeroed */
217 return BIT(0);
218 return BIT(ffs(mask) - 1);
219}
220
221#define MAX_ANT_NUM 2
222/*
223 * Toggles between TX antennas to send the probe request on.
224 * Receives the bitmask of valid TX antennas and the *index* used
225 * for the last TX, and returns the next valid *index* to use.
226 * In order to set it in the tx_cmd, must do BIT(idx).
227 */
228u8 iwl_mvm_next_antenna(struct iwl_mvm *mvm, u8 valid, u8 last_idx)
229{
230 u8 ind = last_idx;
231 int i;
232
233 for (i = 0; i < MAX_ANT_NUM; i++) {
234 ind = (ind + 1) % MAX_ANT_NUM;
235 if (valid & BIT(ind))
236 return ind;
237 }
238
239 WARN_ONCE(1, "Failed to toggle between antennas 0x%x", valid);
240 return last_idx;
241}
242
243/**
244 * iwl_mvm_send_lq_cmd() - Send link quality command
245 * @mvm: Driver data.
246 * @lq: Link quality command to send.
247 *
248 * The link quality command is sent as the last step of station creation.
249 * This is the special case in which init is set and we call a callback in
250 * this case to clear the state indicating that station creation is in
251 * progress.
252 */
253int iwl_mvm_send_lq_cmd(struct iwl_mvm *mvm, struct iwl_lq_cmd *lq)
254{
255 struct iwl_host_cmd cmd = {
256 .id = LQ_CMD,
257 .len = { sizeof(struct iwl_lq_cmd), },
258 .flags = CMD_ASYNC,
259 .data = { lq, },
260 };
261
262 if (WARN_ON(lq->sta_id == IWL_MVM_INVALID_STA ||
263 iwl_mvm_has_tlc_offload(mvm)))
264 return -EINVAL;
265
266 return iwl_mvm_send_cmd(mvm, &cmd);
267}
268
269/**
270 * iwl_mvm_update_smps - Get a request to change the SMPS mode
271 * @mvm: Driver data.
272 * @vif: Pointer to the ieee80211_vif structure
273 * @req_type: The part of the driver who call for a change.
274 * @smps_request: The request to change the SMPS mode.
275 *
276 * Get a requst to change the SMPS mode,
277 * and change it according to all other requests in the driver.
278 */
279void iwl_mvm_update_smps(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
280 enum iwl_mvm_smps_type_request req_type,
281 enum ieee80211_smps_mode smps_request)
282{
283 struct iwl_mvm_vif *mvmvif;
284 enum ieee80211_smps_mode smps_mode = IEEE80211_SMPS_AUTOMATIC;
285 int i;
286
287 lockdep_assert_held(&mvm->mutex);
288
289 /* SMPS is irrelevant for NICs that don't have at least 2 RX antenna */
290 if (num_of_ant(iwl_mvm_get_valid_rx_ant(mvm)) == 1)
291 return;
292
293 if (vif->type != NL80211_IFTYPE_STATION)
294 return;
295
296 mvmvif = iwl_mvm_vif_from_mac80211(vif);
297 mvmvif->smps_requests[req_type] = smps_request;
298 for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++) {
299 if (mvmvif->smps_requests[i] == IEEE80211_SMPS_STATIC) {
300 smps_mode = IEEE80211_SMPS_STATIC;
301 break;
302 }
303 if (mvmvif->smps_requests[i] == IEEE80211_SMPS_DYNAMIC)
304 smps_mode = IEEE80211_SMPS_DYNAMIC;
305 }
306
307 ieee80211_request_smps(vif, 0, smps_mode);
308}
309
310static bool iwl_wait_stats_complete(struct iwl_notif_wait_data *notif_wait,
311 struct iwl_rx_packet *pkt, void *data)
312{
313 WARN_ON(pkt->hdr.cmd != STATISTICS_NOTIFICATION);
314
315 return true;
316}
317
318int iwl_mvm_request_statistics(struct iwl_mvm *mvm, bool clear)
319{
320 struct iwl_statistics_cmd scmd = {
321 .flags = clear ? cpu_to_le32(IWL_STATISTICS_FLG_CLEAR) : 0,
322 };
323
324 struct iwl_host_cmd cmd = {
325 .id = STATISTICS_CMD,
326 .len[0] = sizeof(scmd),
327 .data[0] = &scmd,
328 };
329 int ret;
330
331 /* From version 15 - STATISTICS_NOTIFICATION, the reply for
332 * STATISTICS_CMD is empty, and the response is with
333 * STATISTICS_NOTIFICATION notification
334 */
335 if (iwl_fw_lookup_notif_ver(mvm->fw, LEGACY_GROUP,
336 STATISTICS_NOTIFICATION, 0) < 15) {
337 cmd.flags = CMD_WANT_SKB;
338
339 ret = iwl_mvm_send_cmd(mvm, &cmd);
340 if (ret)
341 return ret;
342
343 iwl_mvm_handle_rx_statistics(mvm, cmd.resp_pkt);
344 iwl_free_resp(&cmd);
345 } else {
346 struct iwl_notification_wait stats_wait;
347 static const u16 stats_complete[] = {
348 STATISTICS_NOTIFICATION,
349 };
350
351 iwl_init_notification_wait(&mvm->notif_wait, &stats_wait,
352 stats_complete, ARRAY_SIZE(stats_complete),
353 iwl_wait_stats_complete, NULL);
354
355 ret = iwl_mvm_send_cmd(mvm, &cmd);
356 if (ret) {
357 iwl_remove_notification(&mvm->notif_wait, &stats_wait);
358 return ret;
359 }
360
361 /* 200ms should be enough for FW to collect data from all
362 * LMACs and send STATISTICS_NOTIFICATION to host
363 */
364 ret = iwl_wait_notification(&mvm->notif_wait, &stats_wait, HZ / 5);
365 if (ret)
366 return ret;
367 }
368
369 if (clear)
370 iwl_mvm_accu_radio_stats(mvm);
371
372 return 0;
373}
374
375void iwl_mvm_accu_radio_stats(struct iwl_mvm *mvm)
376{
377 mvm->accu_radio_stats.rx_time += mvm->radio_stats.rx_time;
378 mvm->accu_radio_stats.tx_time += mvm->radio_stats.tx_time;
379 mvm->accu_radio_stats.on_time_rf += mvm->radio_stats.on_time_rf;
380 mvm->accu_radio_stats.on_time_scan += mvm->radio_stats.on_time_scan;
381}
382
383struct iwl_mvm_diversity_iter_data {
384 struct iwl_mvm_phy_ctxt *ctxt;
385 bool result;
386};
387
388static void iwl_mvm_diversity_iter(void *_data, u8 *mac,
389 struct ieee80211_vif *vif)
390{
391 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
392 struct iwl_mvm_diversity_iter_data *data = _data;
393 int i;
394
395 if (mvmvif->phy_ctxt != data->ctxt)
396 return;
397
398 for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++) {
399 if (mvmvif->smps_requests[i] == IEEE80211_SMPS_STATIC ||
400 mvmvif->smps_requests[i] == IEEE80211_SMPS_DYNAMIC) {
401 data->result = false;
402 break;
403 }
404 }
405}
406
407bool iwl_mvm_rx_diversity_allowed(struct iwl_mvm *mvm,
408 struct iwl_mvm_phy_ctxt *ctxt)
409{
410 struct iwl_mvm_diversity_iter_data data = {
411 .ctxt = ctxt,
412 .result = true,
413 };
414
415 lockdep_assert_held(&mvm->mutex);
416
417 if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
418 return false;
419
420 if (num_of_ant(iwl_mvm_get_valid_rx_ant(mvm)) == 1)
421 return false;
422
423 if (mvm->cfg->rx_with_siso_diversity)
424 return false;
425
426 ieee80211_iterate_active_interfaces_atomic(
427 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
428 iwl_mvm_diversity_iter, &data);
429
430 return data.result;
431}
432
433void iwl_mvm_send_low_latency_cmd(struct iwl_mvm *mvm,
434 bool low_latency, u16 mac_id)
435{
436 struct iwl_mac_low_latency_cmd cmd = {
437 .mac_id = cpu_to_le32(mac_id)
438 };
439
440 if (!fw_has_capa(&mvm->fw->ucode_capa,
441 IWL_UCODE_TLV_CAPA_DYNAMIC_QUOTA))
442 return;
443
444 if (low_latency) {
445 /* currently we don't care about the direction */
446 cmd.low_latency_rx = 1;
447 cmd.low_latency_tx = 1;
448 }
449
450 if (iwl_mvm_send_cmd_pdu(mvm, WIDE_ID(MAC_CONF_GROUP, LOW_LATENCY_CMD),
451 0, sizeof(cmd), &cmd))
452 IWL_ERR(mvm, "Failed to send low latency command\n");
453}
454
455int iwl_mvm_update_low_latency(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
456 bool low_latency,
457 enum iwl_mvm_low_latency_cause cause)
458{
459 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
460 int res;
461 bool prev;
462
463 lockdep_assert_held(&mvm->mutex);
464
465 prev = iwl_mvm_vif_low_latency(mvmvif);
466 iwl_mvm_vif_set_low_latency(mvmvif, low_latency, cause);
467
468 low_latency = iwl_mvm_vif_low_latency(mvmvif);
469
470 if (low_latency == prev)
471 return 0;
472
473 iwl_mvm_send_low_latency_cmd(mvm, low_latency, mvmvif->id);
474
475 res = iwl_mvm_update_quotas(mvm, false, NULL);
476 if (res)
477 return res;
478
479 iwl_mvm_bt_coex_vif_change(mvm);
480
481 return iwl_mvm_power_update_mac(mvm);
482}
483
484struct iwl_mvm_low_latency_iter {
485 bool result;
486 bool result_per_band[NUM_NL80211_BANDS];
487};
488
489static void iwl_mvm_ll_iter(void *_data, u8 *mac, struct ieee80211_vif *vif)
490{
491 struct iwl_mvm_low_latency_iter *result = _data;
492 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
493 enum nl80211_band band;
494
495 if (iwl_mvm_vif_low_latency(mvmvif)) {
496 result->result = true;
497
498 if (!mvmvif->phy_ctxt)
499 return;
500
501 band = mvmvif->phy_ctxt->channel->band;
502 result->result_per_band[band] = true;
503 }
504}
505
506bool iwl_mvm_low_latency(struct iwl_mvm *mvm)
507{
508 struct iwl_mvm_low_latency_iter data = {};
509
510 ieee80211_iterate_active_interfaces_atomic(
511 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
512 iwl_mvm_ll_iter, &data);
513
514 return data.result;
515}
516
517bool iwl_mvm_low_latency_band(struct iwl_mvm *mvm, enum nl80211_band band)
518{
519 struct iwl_mvm_low_latency_iter data = {};
520
521 ieee80211_iterate_active_interfaces_atomic(
522 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
523 iwl_mvm_ll_iter, &data);
524
525 return data.result_per_band[band];
526}
527
528struct iwl_bss_iter_data {
529 struct ieee80211_vif *vif;
530 bool error;
531};
532
533static void iwl_mvm_bss_iface_iterator(void *_data, u8 *mac,
534 struct ieee80211_vif *vif)
535{
536 struct iwl_bss_iter_data *data = _data;
537
538 if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
539 return;
540
541 if (data->vif) {
542 data->error = true;
543 return;
544 }
545
546 data->vif = vif;
547}
548
549struct ieee80211_vif *iwl_mvm_get_bss_vif(struct iwl_mvm *mvm)
550{
551 struct iwl_bss_iter_data bss_iter_data = {};
552
553 ieee80211_iterate_active_interfaces_atomic(
554 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
555 iwl_mvm_bss_iface_iterator, &bss_iter_data);
556
557 if (bss_iter_data.error) {
558 IWL_ERR(mvm, "More than one managed interface active!\n");
559 return ERR_PTR(-EINVAL);
560 }
561
562 return bss_iter_data.vif;
563}
564
565struct iwl_bss_find_iter_data {
566 struct ieee80211_vif *vif;
567 u32 macid;
568};
569
570static void iwl_mvm_bss_find_iface_iterator(void *_data, u8 *mac,
571 struct ieee80211_vif *vif)
572{
573 struct iwl_bss_find_iter_data *data = _data;
574 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
575
576 if (mvmvif->id == data->macid)
577 data->vif = vif;
578}
579
580struct ieee80211_vif *iwl_mvm_get_vif_by_macid(struct iwl_mvm *mvm, u32 macid)
581{
582 struct iwl_bss_find_iter_data data = {
583 .macid = macid,
584 };
585
586 lockdep_assert_held(&mvm->mutex);
587
588 ieee80211_iterate_active_interfaces_atomic(
589 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
590 iwl_mvm_bss_find_iface_iterator, &data);
591
592 return data.vif;
593}
594
595struct iwl_sta_iter_data {
596 bool assoc;
597};
598
599static void iwl_mvm_sta_iface_iterator(void *_data, u8 *mac,
600 struct ieee80211_vif *vif)
601{
602 struct iwl_sta_iter_data *data = _data;
603
604 if (vif->type != NL80211_IFTYPE_STATION)
605 return;
606
607 if (vif->cfg.assoc)
608 data->assoc = true;
609}
610
611bool iwl_mvm_is_vif_assoc(struct iwl_mvm *mvm)
612{
613 struct iwl_sta_iter_data data = {
614 .assoc = false,
615 };
616
617 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
618 IEEE80211_IFACE_ITER_NORMAL,
619 iwl_mvm_sta_iface_iterator,
620 &data);
621 return data.assoc;
622}
623
624unsigned int iwl_mvm_get_wd_timeout(struct iwl_mvm *mvm,
625 struct ieee80211_vif *vif,
626 bool tdls, bool cmd_q)
627{
628 struct iwl_fw_dbg_trigger_tlv *trigger;
629 struct iwl_fw_dbg_trigger_txq_timer *txq_timer;
630 unsigned int default_timeout = cmd_q ?
631 IWL_DEF_WD_TIMEOUT :
632 mvm->trans->trans_cfg->base_params->wd_timeout;
633
634 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TXQ_TIMERS)) {
635 /*
636 * We can't know when the station is asleep or awake, so we
637 * must disable the queue hang detection.
638 */
639 if (fw_has_capa(&mvm->fw->ucode_capa,
640 IWL_UCODE_TLV_CAPA_STA_PM_NOTIF) &&
641 vif && vif->type == NL80211_IFTYPE_AP)
642 return IWL_WATCHDOG_DISABLED;
643 return default_timeout;
644 }
645
646 trigger = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TXQ_TIMERS);
647 txq_timer = (void *)trigger->data;
648
649 if (tdls)
650 return le32_to_cpu(txq_timer->tdls);
651
652 if (cmd_q)
653 return le32_to_cpu(txq_timer->command_queue);
654
655 if (WARN_ON(!vif))
656 return default_timeout;
657
658 switch (ieee80211_vif_type_p2p(vif)) {
659 case NL80211_IFTYPE_ADHOC:
660 return le32_to_cpu(txq_timer->ibss);
661 case NL80211_IFTYPE_STATION:
662 return le32_to_cpu(txq_timer->bss);
663 case NL80211_IFTYPE_AP:
664 return le32_to_cpu(txq_timer->softap);
665 case NL80211_IFTYPE_P2P_CLIENT:
666 return le32_to_cpu(txq_timer->p2p_client);
667 case NL80211_IFTYPE_P2P_GO:
668 return le32_to_cpu(txq_timer->p2p_go);
669 case NL80211_IFTYPE_P2P_DEVICE:
670 return le32_to_cpu(txq_timer->p2p_device);
671 case NL80211_IFTYPE_MONITOR:
672 return default_timeout;
673 default:
674 WARN_ON(1);
675 return mvm->trans->trans_cfg->base_params->wd_timeout;
676 }
677}
678
679void iwl_mvm_connection_loss(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
680 const char *errmsg)
681{
682 struct iwl_fw_dbg_trigger_tlv *trig;
683 struct iwl_fw_dbg_trigger_mlme *trig_mlme;
684
685 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, ieee80211_vif_to_wdev(vif),
686 FW_DBG_TRIGGER_MLME);
687 if (!trig)
688 goto out;
689
690 trig_mlme = (void *)trig->data;
691
692 if (trig_mlme->stop_connection_loss &&
693 --trig_mlme->stop_connection_loss)
694 goto out;
695
696 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, "%s", errmsg);
697
698out:
699 ieee80211_connection_loss(vif);
700}
701
702void iwl_mvm_event_frame_timeout_callback(struct iwl_mvm *mvm,
703 struct ieee80211_vif *vif,
704 const struct ieee80211_sta *sta,
705 u16 tid)
706{
707 struct iwl_fw_dbg_trigger_tlv *trig;
708 struct iwl_fw_dbg_trigger_ba *ba_trig;
709
710 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, ieee80211_vif_to_wdev(vif),
711 FW_DBG_TRIGGER_BA);
712 if (!trig)
713 return;
714
715 ba_trig = (void *)trig->data;
716
717 if (!(le16_to_cpu(ba_trig->frame_timeout) & BIT(tid)))
718 return;
719
720 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
721 "Frame from %pM timed out, tid %d",
722 sta->addr, tid);
723}
724
725u8 iwl_mvm_tcm_load_percentage(u32 airtime, u32 elapsed)
726{
727 if (!elapsed)
728 return 0;
729
730 return (100 * airtime / elapsed) / USEC_PER_MSEC;
731}
732
733static enum iwl_mvm_traffic_load
734iwl_mvm_tcm_load(struct iwl_mvm *mvm, u32 airtime, unsigned long elapsed)
735{
736 u8 load = iwl_mvm_tcm_load_percentage(airtime, elapsed);
737
738 if (load > IWL_MVM_TCM_LOAD_HIGH_THRESH)
739 return IWL_MVM_TRAFFIC_HIGH;
740 if (load > IWL_MVM_TCM_LOAD_MEDIUM_THRESH)
741 return IWL_MVM_TRAFFIC_MEDIUM;
742
743 return IWL_MVM_TRAFFIC_LOW;
744}
745
746static void iwl_mvm_tcm_iter(void *_data, u8 *mac, struct ieee80211_vif *vif)
747{
748 struct iwl_mvm *mvm = _data;
749 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
750 bool low_latency, prev = mvmvif->low_latency & LOW_LATENCY_TRAFFIC;
751
752 if (mvmvif->id >= NUM_MAC_INDEX_DRIVER)
753 return;
754
755 low_latency = mvm->tcm.result.low_latency[mvmvif->id];
756
757 if (!mvm->tcm.result.change[mvmvif->id] &&
758 prev == low_latency) {
759 iwl_mvm_update_quotas(mvm, false, NULL);
760 return;
761 }
762
763 if (prev != low_latency) {
764 /* this sends traffic load and updates quota as well */
765 iwl_mvm_update_low_latency(mvm, vif, low_latency,
766 LOW_LATENCY_TRAFFIC);
767 } else {
768 iwl_mvm_update_quotas(mvm, false, NULL);
769 }
770}
771
772static void iwl_mvm_tcm_results(struct iwl_mvm *mvm)
773{
774 mutex_lock(&mvm->mutex);
775
776 ieee80211_iterate_active_interfaces(
777 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
778 iwl_mvm_tcm_iter, mvm);
779
780 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
781 iwl_mvm_config_scan(mvm);
782
783 mutex_unlock(&mvm->mutex);
784}
785
786static void iwl_mvm_tcm_uapsd_nonagg_detected_wk(struct work_struct *wk)
787{
788 struct iwl_mvm *mvm;
789 struct iwl_mvm_vif *mvmvif;
790 struct ieee80211_vif *vif;
791
792 mvmvif = container_of(wk, struct iwl_mvm_vif,
793 uapsd_nonagg_detected_wk.work);
794 vif = container_of((void *)mvmvif, struct ieee80211_vif, drv_priv);
795 mvm = mvmvif->mvm;
796
797 if (mvm->tcm.data[mvmvif->id].opened_rx_ba_sessions)
798 return;
799
800 /* remember that this AP is broken */
801 memcpy(mvm->uapsd_noagg_bssids[mvm->uapsd_noagg_bssid_write_idx].addr,
802 vif->bss_conf.bssid, ETH_ALEN);
803 mvm->uapsd_noagg_bssid_write_idx++;
804 if (mvm->uapsd_noagg_bssid_write_idx >= IWL_MVM_UAPSD_NOAGG_LIST_LEN)
805 mvm->uapsd_noagg_bssid_write_idx = 0;
806
807 iwl_mvm_connection_loss(mvm, vif,
808 "AP isn't using AMPDU with uAPSD enabled");
809}
810
811static void iwl_mvm_uapsd_agg_disconnect(struct iwl_mvm *mvm,
812 struct ieee80211_vif *vif)
813{
814 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
815
816 if (vif->type != NL80211_IFTYPE_STATION)
817 return;
818
819 if (!vif->cfg.assoc)
820 return;
821
822 if (!mvmvif->queue_params[IEEE80211_AC_VO].uapsd &&
823 !mvmvif->queue_params[IEEE80211_AC_VI].uapsd &&
824 !mvmvif->queue_params[IEEE80211_AC_BE].uapsd &&
825 !mvmvif->queue_params[IEEE80211_AC_BK].uapsd)
826 return;
827
828 if (mvm->tcm.data[mvmvif->id].uapsd_nonagg_detect.detected)
829 return;
830
831 mvm->tcm.data[mvmvif->id].uapsd_nonagg_detect.detected = true;
832 IWL_INFO(mvm,
833 "detected AP should do aggregation but isn't, likely due to U-APSD\n");
834 schedule_delayed_work(&mvmvif->uapsd_nonagg_detected_wk, 15 * HZ);
835}
836
837static void iwl_mvm_check_uapsd_agg_expected_tpt(struct iwl_mvm *mvm,
838 unsigned int elapsed,
839 int mac)
840{
841 u64 bytes = mvm->tcm.data[mac].uapsd_nonagg_detect.rx_bytes;
842 u64 tpt;
843 unsigned long rate;
844 struct ieee80211_vif *vif;
845
846 rate = ewma_rate_read(&mvm->tcm.data[mac].uapsd_nonagg_detect.rate);
847
848 if (!rate || mvm->tcm.data[mac].opened_rx_ba_sessions ||
849 mvm->tcm.data[mac].uapsd_nonagg_detect.detected)
850 return;
851
852 if (iwl_mvm_has_new_rx_api(mvm)) {
853 tpt = 8 * bytes; /* kbps */
854 do_div(tpt, elapsed);
855 rate *= 1000; /* kbps */
856 if (tpt < 22 * rate / 100)
857 return;
858 } else {
859 /*
860 * the rate here is actually the threshold, in 100Kbps units,
861 * so do the needed conversion from bytes to 100Kbps:
862 * 100kb = bits / (100 * 1000),
863 * 100kbps = 100kb / (msecs / 1000) ==
864 * (bits / (100 * 1000)) / (msecs / 1000) ==
865 * bits / (100 * msecs)
866 */
867 tpt = (8 * bytes);
868 do_div(tpt, elapsed * 100);
869 if (tpt < rate)
870 return;
871 }
872
873 rcu_read_lock();
874 vif = rcu_dereference(mvm->vif_id_to_mac[mac]);
875 if (vif)
876 iwl_mvm_uapsd_agg_disconnect(mvm, vif);
877 rcu_read_unlock();
878}
879
880static void iwl_mvm_tcm_iterator(void *_data, u8 *mac,
881 struct ieee80211_vif *vif)
882{
883 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
884 u32 *band = _data;
885
886 if (!mvmvif->phy_ctxt)
887 return;
888
889 band[mvmvif->id] = mvmvif->phy_ctxt->channel->band;
890}
891
892static unsigned long iwl_mvm_calc_tcm_stats(struct iwl_mvm *mvm,
893 unsigned long ts,
894 bool handle_uapsd)
895{
896 unsigned int elapsed = jiffies_to_msecs(ts - mvm->tcm.ts);
897 unsigned int uapsd_elapsed =
898 jiffies_to_msecs(ts - mvm->tcm.uapsd_nonagg_ts);
899 u32 total_airtime = 0;
900 u32 band_airtime[NUM_NL80211_BANDS] = {0};
901 u32 band[NUM_MAC_INDEX_DRIVER] = {0};
902 int ac, mac, i;
903 bool low_latency = false;
904 enum iwl_mvm_traffic_load load, band_load;
905 bool handle_ll = time_after(ts, mvm->tcm.ll_ts + MVM_LL_PERIOD);
906
907 if (handle_ll)
908 mvm->tcm.ll_ts = ts;
909 if (handle_uapsd)
910 mvm->tcm.uapsd_nonagg_ts = ts;
911
912 mvm->tcm.result.elapsed = elapsed;
913
914 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
915 IEEE80211_IFACE_ITER_NORMAL,
916 iwl_mvm_tcm_iterator,
917 &band);
918
919 for (mac = 0; mac < NUM_MAC_INDEX_DRIVER; mac++) {
920 struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[mac];
921 u32 vo_vi_pkts = 0;
922 u32 airtime = mdata->rx.airtime + mdata->tx.airtime;
923
924 total_airtime += airtime;
925 band_airtime[band[mac]] += airtime;
926
927 load = iwl_mvm_tcm_load(mvm, airtime, elapsed);
928 mvm->tcm.result.change[mac] = load != mvm->tcm.result.load[mac];
929 mvm->tcm.result.load[mac] = load;
930 mvm->tcm.result.airtime[mac] = airtime;
931
932 for (ac = IEEE80211_AC_VO; ac <= IEEE80211_AC_VI; ac++)
933 vo_vi_pkts += mdata->rx.pkts[ac] +
934 mdata->tx.pkts[ac];
935
936 /* enable immediately with enough packets but defer disabling */
937 if (vo_vi_pkts > IWL_MVM_TCM_LOWLAT_ENABLE_THRESH)
938 mvm->tcm.result.low_latency[mac] = true;
939 else if (handle_ll)
940 mvm->tcm.result.low_latency[mac] = false;
941
942 if (handle_ll) {
943 /* clear old data */
944 memset(&mdata->rx.pkts, 0, sizeof(mdata->rx.pkts));
945 memset(&mdata->tx.pkts, 0, sizeof(mdata->tx.pkts));
946 }
947 low_latency |= mvm->tcm.result.low_latency[mac];
948
949 if (!mvm->tcm.result.low_latency[mac] && handle_uapsd)
950 iwl_mvm_check_uapsd_agg_expected_tpt(mvm, uapsd_elapsed,
951 mac);
952 /* clear old data */
953 if (handle_uapsd)
954 mdata->uapsd_nonagg_detect.rx_bytes = 0;
955 memset(&mdata->rx.airtime, 0, sizeof(mdata->rx.airtime));
956 memset(&mdata->tx.airtime, 0, sizeof(mdata->tx.airtime));
957 }
958
959 load = iwl_mvm_tcm_load(mvm, total_airtime, elapsed);
960 mvm->tcm.result.global_load = load;
961
962 for (i = 0; i < NUM_NL80211_BANDS; i++) {
963 band_load = iwl_mvm_tcm_load(mvm, band_airtime[i], elapsed);
964 mvm->tcm.result.band_load[i] = band_load;
965 }
966
967 /*
968 * If the current load isn't low we need to force re-evaluation
969 * in the TCM period, so that we can return to low load if there
970 * was no traffic at all (and thus iwl_mvm_recalc_tcm didn't get
971 * triggered by traffic).
972 */
973 if (load != IWL_MVM_TRAFFIC_LOW)
974 return MVM_TCM_PERIOD;
975 /*
976 * If low-latency is active we need to force re-evaluation after
977 * (the longer) MVM_LL_PERIOD, so that we can disable low-latency
978 * when there's no traffic at all.
979 */
980 if (low_latency)
981 return MVM_LL_PERIOD;
982 /*
983 * Otherwise, we don't need to run the work struct because we're
984 * in the default "idle" state - traffic indication is low (which
985 * also covers the "no traffic" case) and low-latency is disabled
986 * so there's no state that may need to be disabled when there's
987 * no traffic at all.
988 *
989 * Note that this has no impact on the regular scheduling of the
990 * updates triggered by traffic - those happen whenever one of the
991 * two timeouts expire (if there's traffic at all.)
992 */
993 return 0;
994}
995
996void iwl_mvm_recalc_tcm(struct iwl_mvm *mvm)
997{
998 unsigned long ts = jiffies;
999 bool handle_uapsd =
1000 time_after(ts, mvm->tcm.uapsd_nonagg_ts +
1001 msecs_to_jiffies(IWL_MVM_UAPSD_NONAGG_PERIOD));
1002
1003 spin_lock(&mvm->tcm.lock);
1004 if (mvm->tcm.paused || !time_after(ts, mvm->tcm.ts + MVM_TCM_PERIOD)) {
1005 spin_unlock(&mvm->tcm.lock);
1006 return;
1007 }
1008 spin_unlock(&mvm->tcm.lock);
1009
1010 if (handle_uapsd && iwl_mvm_has_new_rx_api(mvm)) {
1011 mutex_lock(&mvm->mutex);
1012 if (iwl_mvm_request_statistics(mvm, true))
1013 handle_uapsd = false;
1014 mutex_unlock(&mvm->mutex);
1015 }
1016
1017 spin_lock(&mvm->tcm.lock);
1018 /* re-check if somebody else won the recheck race */
1019 if (!mvm->tcm.paused && time_after(ts, mvm->tcm.ts + MVM_TCM_PERIOD)) {
1020 /* calculate statistics */
1021 unsigned long work_delay = iwl_mvm_calc_tcm_stats(mvm, ts,
1022 handle_uapsd);
1023
1024 /* the memset needs to be visible before the timestamp */
1025 smp_mb();
1026 mvm->tcm.ts = ts;
1027 if (work_delay)
1028 schedule_delayed_work(&mvm->tcm.work, work_delay);
1029 }
1030 spin_unlock(&mvm->tcm.lock);
1031
1032 iwl_mvm_tcm_results(mvm);
1033}
1034
1035void iwl_mvm_tcm_work(struct work_struct *work)
1036{
1037 struct delayed_work *delayed_work = to_delayed_work(work);
1038 struct iwl_mvm *mvm = container_of(delayed_work, struct iwl_mvm,
1039 tcm.work);
1040
1041 iwl_mvm_recalc_tcm(mvm);
1042}
1043
1044void iwl_mvm_pause_tcm(struct iwl_mvm *mvm, bool with_cancel)
1045{
1046 spin_lock_bh(&mvm->tcm.lock);
1047 mvm->tcm.paused = true;
1048 spin_unlock_bh(&mvm->tcm.lock);
1049 if (with_cancel)
1050 cancel_delayed_work_sync(&mvm->tcm.work);
1051}
1052
1053void iwl_mvm_resume_tcm(struct iwl_mvm *mvm)
1054{
1055 int mac;
1056 bool low_latency = false;
1057
1058 spin_lock_bh(&mvm->tcm.lock);
1059 mvm->tcm.ts = jiffies;
1060 mvm->tcm.ll_ts = jiffies;
1061 for (mac = 0; mac < NUM_MAC_INDEX_DRIVER; mac++) {
1062 struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[mac];
1063
1064 memset(&mdata->rx.pkts, 0, sizeof(mdata->rx.pkts));
1065 memset(&mdata->tx.pkts, 0, sizeof(mdata->tx.pkts));
1066 memset(&mdata->rx.airtime, 0, sizeof(mdata->rx.airtime));
1067 memset(&mdata->tx.airtime, 0, sizeof(mdata->tx.airtime));
1068
1069 if (mvm->tcm.result.low_latency[mac])
1070 low_latency = true;
1071 }
1072 /* The TCM data needs to be reset before "paused" flag changes */
1073 smp_mb();
1074 mvm->tcm.paused = false;
1075
1076 /*
1077 * if the current load is not low or low latency is active, force
1078 * re-evaluation to cover the case of no traffic.
1079 */
1080 if (mvm->tcm.result.global_load > IWL_MVM_TRAFFIC_LOW)
1081 schedule_delayed_work(&mvm->tcm.work, MVM_TCM_PERIOD);
1082 else if (low_latency)
1083 schedule_delayed_work(&mvm->tcm.work, MVM_LL_PERIOD);
1084
1085 spin_unlock_bh(&mvm->tcm.lock);
1086}
1087
1088void iwl_mvm_tcm_add_vif(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1089{
1090 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1091
1092 INIT_DELAYED_WORK(&mvmvif->uapsd_nonagg_detected_wk,
1093 iwl_mvm_tcm_uapsd_nonagg_detected_wk);
1094}
1095
1096void iwl_mvm_tcm_rm_vif(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1097{
1098 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1099
1100 cancel_delayed_work_sync(&mvmvif->uapsd_nonagg_detected_wk);
1101}
1102
1103u32 iwl_mvm_get_systime(struct iwl_mvm *mvm)
1104{
1105 u32 reg_addr = DEVICE_SYSTEM_TIME_REG;
1106
1107 if (mvm->trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_22000 &&
1108 mvm->trans->cfg->gp2_reg_addr)
1109 reg_addr = mvm->trans->cfg->gp2_reg_addr;
1110
1111 return iwl_read_prph(mvm->trans, reg_addr);
1112}
1113
1114void iwl_mvm_get_sync_time(struct iwl_mvm *mvm, int clock_type,
1115 u32 *gp2, u64 *boottime, ktime_t *realtime)
1116{
1117 bool ps_disabled;
1118
1119 lockdep_assert_held(&mvm->mutex);
1120
1121 /* Disable power save when reading GP2 */
1122 ps_disabled = mvm->ps_disabled;
1123 if (!ps_disabled) {
1124 mvm->ps_disabled = true;
1125 iwl_mvm_power_update_device(mvm);
1126 }
1127
1128 *gp2 = iwl_mvm_get_systime(mvm);
1129
1130 if (clock_type == CLOCK_BOOTTIME && boottime)
1131 *boottime = ktime_get_boottime_ns();
1132 else if (clock_type == CLOCK_REALTIME && realtime)
1133 *realtime = ktime_get_real();
1134
1135 if (!ps_disabled) {
1136 mvm->ps_disabled = ps_disabled;
1137 iwl_mvm_power_update_device(mvm);
1138 }
1139}