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1// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2/*
3 * Copyright (C) 2012-2014, 2018-2021 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
138#define IWL_DECLARE_RATE_INFO(r) \
139 [IWL_RATE_##r##M_INDEX] = IWL_RATE_##r##M_PLCP
140
141/*
142 * Translate from fw_rate_index (IWL_RATE_XXM_INDEX) to PLCP
143 */
144static const u8 fw_rate_idx_to_plcp[IWL_RATE_COUNT] = {
145 IWL_DECLARE_RATE_INFO(1),
146 IWL_DECLARE_RATE_INFO(2),
147 IWL_DECLARE_RATE_INFO(5),
148 IWL_DECLARE_RATE_INFO(11),
149 IWL_DECLARE_RATE_INFO(6),
150 IWL_DECLARE_RATE_INFO(9),
151 IWL_DECLARE_RATE_INFO(12),
152 IWL_DECLARE_RATE_INFO(18),
153 IWL_DECLARE_RATE_INFO(24),
154 IWL_DECLARE_RATE_INFO(36),
155 IWL_DECLARE_RATE_INFO(48),
156 IWL_DECLARE_RATE_INFO(54),
157};
158
159int iwl_mvm_legacy_rate_to_mac80211_idx(u32 rate_n_flags,
160 enum nl80211_band band)
161{
162 int rate = rate_n_flags & RATE_LEGACY_RATE_MSK;
163 int idx;
164 int band_offset = 0;
165
166 /* Legacy rate format, search for match in table */
167 if (band != NL80211_BAND_2GHZ)
168 band_offset = IWL_FIRST_OFDM_RATE;
169 for (idx = band_offset; idx < IWL_RATE_COUNT_LEGACY; idx++)
170 if (fw_rate_idx_to_plcp[idx] == rate)
171 return idx - band_offset;
172
173 return -1;
174}
175
176u8 iwl_mvm_mac80211_idx_to_hwrate(int rate_idx)
177{
178 /* Get PLCP rate for tx_cmd->rate_n_flags */
179 return fw_rate_idx_to_plcp[rate_idx];
180}
181
182u8 iwl_mvm_mac80211_ac_to_ucode_ac(enum ieee80211_ac_numbers ac)
183{
184 static const u8 mac80211_ac_to_ucode_ac[] = {
185 AC_VO,
186 AC_VI,
187 AC_BE,
188 AC_BK
189 };
190
191 return mac80211_ac_to_ucode_ac[ac];
192}
193
194void iwl_mvm_rx_fw_error(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
195{
196 struct iwl_rx_packet *pkt = rxb_addr(rxb);
197 struct iwl_error_resp *err_resp = (void *)pkt->data;
198
199 IWL_ERR(mvm, "FW Error notification: type 0x%08X cmd_id 0x%02X\n",
200 le32_to_cpu(err_resp->error_type), err_resp->cmd_id);
201 IWL_ERR(mvm, "FW Error notification: seq 0x%04X service 0x%08X\n",
202 le16_to_cpu(err_resp->bad_cmd_seq_num),
203 le32_to_cpu(err_resp->error_service));
204 IWL_ERR(mvm, "FW Error notification: timestamp 0x%016llX\n",
205 le64_to_cpu(err_resp->timestamp));
206}
207
208/*
209 * Returns the first antenna as ANT_[ABC], as defined in iwl-config.h.
210 * The parameter should also be a combination of ANT_[ABC].
211 */
212u8 first_antenna(u8 mask)
213{
214 BUILD_BUG_ON(ANT_A != BIT(0)); /* using ffs is wrong if not */
215 if (WARN_ON_ONCE(!mask)) /* ffs will return 0 if mask is zeroed */
216 return BIT(0);
217 return BIT(ffs(mask) - 1);
218}
219
220/*
221 * Toggles between TX antennas to send the probe request on.
222 * Receives the bitmask of valid TX antennas and the *index* used
223 * for the last TX, and returns the next valid *index* to use.
224 * In order to set it in the tx_cmd, must do BIT(idx).
225 */
226u8 iwl_mvm_next_antenna(struct iwl_mvm *mvm, u8 valid, u8 last_idx)
227{
228 u8 ind = last_idx;
229 int i;
230
231 for (i = 0; i < MAX_ANT_NUM; i++) {
232 ind = (ind + 1) % MAX_ANT_NUM;
233 if (valid & BIT(ind))
234 return ind;
235 }
236
237 WARN_ONCE(1, "Failed to toggle between antennas 0x%x", valid);
238 return last_idx;
239}
240
241int iwl_mvm_reconfig_scd(struct iwl_mvm *mvm, int queue, int fifo, int sta_id,
242 int tid, int frame_limit, u16 ssn)
243{
244 struct iwl_scd_txq_cfg_cmd cmd = {
245 .scd_queue = queue,
246 .action = SCD_CFG_ENABLE_QUEUE,
247 .window = frame_limit,
248 .sta_id = sta_id,
249 .ssn = cpu_to_le16(ssn),
250 .tx_fifo = fifo,
251 .aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
252 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE),
253 .tid = tid,
254 };
255 int ret;
256
257 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
258 return -EINVAL;
259
260 if (WARN(mvm->queue_info[queue].tid_bitmap == 0,
261 "Trying to reconfig unallocated queue %d\n", queue))
262 return -ENXIO;
263
264 IWL_DEBUG_TX_QUEUES(mvm, "Reconfig SCD for TXQ #%d\n", queue);
265
266 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
267 WARN_ONCE(ret, "Failed to re-configure queue %d on FIFO %d, ret=%d\n",
268 queue, fifo, ret);
269
270 return ret;
271}
272
273/**
274 * iwl_mvm_send_lq_cmd() - Send link quality command
275 * @mvm: Driver data.
276 * @lq: Link quality command to send.
277 *
278 * The link quality command is sent as the last step of station creation.
279 * This is the special case in which init is set and we call a callback in
280 * this case to clear the state indicating that station creation is in
281 * progress.
282 */
283int iwl_mvm_send_lq_cmd(struct iwl_mvm *mvm, struct iwl_lq_cmd *lq)
284{
285 struct iwl_host_cmd cmd = {
286 .id = LQ_CMD,
287 .len = { sizeof(struct iwl_lq_cmd), },
288 .flags = CMD_ASYNC,
289 .data = { lq, },
290 };
291
292 if (WARN_ON(lq->sta_id == IWL_MVM_INVALID_STA ||
293 iwl_mvm_has_tlc_offload(mvm)))
294 return -EINVAL;
295
296 return iwl_mvm_send_cmd(mvm, &cmd);
297}
298
299/**
300 * iwl_mvm_update_smps - Get a request to change the SMPS mode
301 * @mvm: Driver data.
302 * @vif: Pointer to the ieee80211_vif structure
303 * @req_type: The part of the driver who call for a change.
304 * @smps_request: The request to change the SMPS mode.
305 *
306 * Get a requst to change the SMPS mode,
307 * and change it according to all other requests in the driver.
308 */
309void iwl_mvm_update_smps(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
310 enum iwl_mvm_smps_type_request req_type,
311 enum ieee80211_smps_mode smps_request)
312{
313 struct iwl_mvm_vif *mvmvif;
314 enum ieee80211_smps_mode smps_mode = IEEE80211_SMPS_AUTOMATIC;
315 int i;
316
317 lockdep_assert_held(&mvm->mutex);
318
319 /* SMPS is irrelevant for NICs that don't have at least 2 RX antenna */
320 if (num_of_ant(iwl_mvm_get_valid_rx_ant(mvm)) == 1)
321 return;
322
323 if (vif->type != NL80211_IFTYPE_STATION)
324 return;
325
326 mvmvif = iwl_mvm_vif_from_mac80211(vif);
327 mvmvif->smps_requests[req_type] = smps_request;
328 for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++) {
329 if (mvmvif->smps_requests[i] == IEEE80211_SMPS_STATIC) {
330 smps_mode = IEEE80211_SMPS_STATIC;
331 break;
332 }
333 if (mvmvif->smps_requests[i] == IEEE80211_SMPS_DYNAMIC)
334 smps_mode = IEEE80211_SMPS_DYNAMIC;
335 }
336
337 ieee80211_request_smps(vif, smps_mode);
338}
339
340int iwl_mvm_request_statistics(struct iwl_mvm *mvm, bool clear)
341{
342 struct iwl_statistics_cmd scmd = {
343 .flags = clear ? cpu_to_le32(IWL_STATISTICS_FLG_CLEAR) : 0,
344 };
345 struct iwl_host_cmd cmd = {
346 .id = STATISTICS_CMD,
347 .len[0] = sizeof(scmd),
348 .data[0] = &scmd,
349 .flags = CMD_WANT_SKB,
350 };
351 int ret;
352
353 ret = iwl_mvm_send_cmd(mvm, &cmd);
354 if (ret)
355 return ret;
356
357 iwl_mvm_handle_rx_statistics(mvm, cmd.resp_pkt);
358 iwl_free_resp(&cmd);
359
360 if (clear)
361 iwl_mvm_accu_radio_stats(mvm);
362
363 return 0;
364}
365
366void iwl_mvm_accu_radio_stats(struct iwl_mvm *mvm)
367{
368 mvm->accu_radio_stats.rx_time += mvm->radio_stats.rx_time;
369 mvm->accu_radio_stats.tx_time += mvm->radio_stats.tx_time;
370 mvm->accu_radio_stats.on_time_rf += mvm->radio_stats.on_time_rf;
371 mvm->accu_radio_stats.on_time_scan += mvm->radio_stats.on_time_scan;
372}
373
374struct iwl_mvm_diversity_iter_data {
375 struct iwl_mvm_phy_ctxt *ctxt;
376 bool result;
377};
378
379static void iwl_mvm_diversity_iter(void *_data, u8 *mac,
380 struct ieee80211_vif *vif)
381{
382 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
383 struct iwl_mvm_diversity_iter_data *data = _data;
384 int i;
385
386 if (mvmvif->phy_ctxt != data->ctxt)
387 return;
388
389 for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++) {
390 if (mvmvif->smps_requests[i] == IEEE80211_SMPS_STATIC ||
391 mvmvif->smps_requests[i] == IEEE80211_SMPS_DYNAMIC) {
392 data->result = false;
393 break;
394 }
395 }
396}
397
398bool iwl_mvm_rx_diversity_allowed(struct iwl_mvm *mvm,
399 struct iwl_mvm_phy_ctxt *ctxt)
400{
401 struct iwl_mvm_diversity_iter_data data = {
402 .ctxt = ctxt,
403 .result = true,
404 };
405
406 lockdep_assert_held(&mvm->mutex);
407
408 if (num_of_ant(iwl_mvm_get_valid_rx_ant(mvm)) == 1)
409 return false;
410
411 if (mvm->cfg->rx_with_siso_diversity)
412 return false;
413
414 ieee80211_iterate_active_interfaces_atomic(
415 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
416 iwl_mvm_diversity_iter, &data);
417
418 return data.result;
419}
420
421void iwl_mvm_send_low_latency_cmd(struct iwl_mvm *mvm,
422 bool low_latency, u16 mac_id)
423{
424 struct iwl_mac_low_latency_cmd cmd = {
425 .mac_id = cpu_to_le32(mac_id)
426 };
427
428 if (!fw_has_capa(&mvm->fw->ucode_capa,
429 IWL_UCODE_TLV_CAPA_DYNAMIC_QUOTA))
430 return;
431
432 if (low_latency) {
433 /* currently we don't care about the direction */
434 cmd.low_latency_rx = 1;
435 cmd.low_latency_tx = 1;
436 }
437
438 if (iwl_mvm_send_cmd_pdu(mvm, iwl_cmd_id(LOW_LATENCY_CMD,
439 MAC_CONF_GROUP, 0),
440 0, sizeof(cmd), &cmd))
441 IWL_ERR(mvm, "Failed to send low latency command\n");
442}
443
444int iwl_mvm_update_low_latency(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
445 bool low_latency,
446 enum iwl_mvm_low_latency_cause cause)
447{
448 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
449 int res;
450 bool prev;
451
452 lockdep_assert_held(&mvm->mutex);
453
454 prev = iwl_mvm_vif_low_latency(mvmvif);
455 iwl_mvm_vif_set_low_latency(mvmvif, low_latency, cause);
456
457 low_latency = iwl_mvm_vif_low_latency(mvmvif);
458
459 if (low_latency == prev)
460 return 0;
461
462 iwl_mvm_send_low_latency_cmd(mvm, low_latency, mvmvif->id);
463
464 res = iwl_mvm_update_quotas(mvm, false, NULL);
465 if (res)
466 return res;
467
468 iwl_mvm_bt_coex_vif_change(mvm);
469
470 return iwl_mvm_power_update_mac(mvm);
471}
472
473struct iwl_mvm_low_latency_iter {
474 bool result;
475 bool result_per_band[NUM_NL80211_BANDS];
476};
477
478static void iwl_mvm_ll_iter(void *_data, u8 *mac, struct ieee80211_vif *vif)
479{
480 struct iwl_mvm_low_latency_iter *result = _data;
481 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
482 enum nl80211_band band;
483
484 if (iwl_mvm_vif_low_latency(mvmvif)) {
485 result->result = true;
486
487 if (!mvmvif->phy_ctxt)
488 return;
489
490 band = mvmvif->phy_ctxt->channel->band;
491 result->result_per_band[band] = true;
492 }
493}
494
495bool iwl_mvm_low_latency(struct iwl_mvm *mvm)
496{
497 struct iwl_mvm_low_latency_iter data = {};
498
499 ieee80211_iterate_active_interfaces_atomic(
500 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
501 iwl_mvm_ll_iter, &data);
502
503 return data.result;
504}
505
506bool iwl_mvm_low_latency_band(struct iwl_mvm *mvm, enum nl80211_band band)
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_per_band[band];
515}
516
517struct iwl_bss_iter_data {
518 struct ieee80211_vif *vif;
519 bool error;
520};
521
522static void iwl_mvm_bss_iface_iterator(void *_data, u8 *mac,
523 struct ieee80211_vif *vif)
524{
525 struct iwl_bss_iter_data *data = _data;
526
527 if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
528 return;
529
530 if (data->vif) {
531 data->error = true;
532 return;
533 }
534
535 data->vif = vif;
536}
537
538struct ieee80211_vif *iwl_mvm_get_bss_vif(struct iwl_mvm *mvm)
539{
540 struct iwl_bss_iter_data bss_iter_data = {};
541
542 ieee80211_iterate_active_interfaces_atomic(
543 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
544 iwl_mvm_bss_iface_iterator, &bss_iter_data);
545
546 if (bss_iter_data.error) {
547 IWL_ERR(mvm, "More than one managed interface active!\n");
548 return ERR_PTR(-EINVAL);
549 }
550
551 return bss_iter_data.vif;
552}
553
554struct iwl_bss_find_iter_data {
555 struct ieee80211_vif *vif;
556 u32 macid;
557};
558
559static void iwl_mvm_bss_find_iface_iterator(void *_data, u8 *mac,
560 struct ieee80211_vif *vif)
561{
562 struct iwl_bss_find_iter_data *data = _data;
563 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
564
565 if (mvmvif->id == data->macid)
566 data->vif = vif;
567}
568
569struct ieee80211_vif *iwl_mvm_get_vif_by_macid(struct iwl_mvm *mvm, u32 macid)
570{
571 struct iwl_bss_find_iter_data data = {
572 .macid = macid,
573 };
574
575 lockdep_assert_held(&mvm->mutex);
576
577 ieee80211_iterate_active_interfaces_atomic(
578 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
579 iwl_mvm_bss_find_iface_iterator, &data);
580
581 return data.vif;
582}
583
584struct iwl_sta_iter_data {
585 bool assoc;
586};
587
588static void iwl_mvm_sta_iface_iterator(void *_data, u8 *mac,
589 struct ieee80211_vif *vif)
590{
591 struct iwl_sta_iter_data *data = _data;
592
593 if (vif->type != NL80211_IFTYPE_STATION)
594 return;
595
596 if (vif->bss_conf.assoc)
597 data->assoc = true;
598}
599
600bool iwl_mvm_is_vif_assoc(struct iwl_mvm *mvm)
601{
602 struct iwl_sta_iter_data data = {
603 .assoc = false,
604 };
605
606 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
607 IEEE80211_IFACE_ITER_NORMAL,
608 iwl_mvm_sta_iface_iterator,
609 &data);
610 return data.assoc;
611}
612
613unsigned int iwl_mvm_get_wd_timeout(struct iwl_mvm *mvm,
614 struct ieee80211_vif *vif,
615 bool tdls, bool cmd_q)
616{
617 struct iwl_fw_dbg_trigger_tlv *trigger;
618 struct iwl_fw_dbg_trigger_txq_timer *txq_timer;
619 unsigned int default_timeout = cmd_q ?
620 IWL_DEF_WD_TIMEOUT :
621 mvm->trans->trans_cfg->base_params->wd_timeout;
622
623 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TXQ_TIMERS)) {
624 /*
625 * We can't know when the station is asleep or awake, so we
626 * must disable the queue hang detection.
627 */
628 if (fw_has_capa(&mvm->fw->ucode_capa,
629 IWL_UCODE_TLV_CAPA_STA_PM_NOTIF) &&
630 vif && vif->type == NL80211_IFTYPE_AP)
631 return IWL_WATCHDOG_DISABLED;
632 return default_timeout;
633 }
634
635 trigger = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TXQ_TIMERS);
636 txq_timer = (void *)trigger->data;
637
638 if (tdls)
639 return le32_to_cpu(txq_timer->tdls);
640
641 if (cmd_q)
642 return le32_to_cpu(txq_timer->command_queue);
643
644 if (WARN_ON(!vif))
645 return default_timeout;
646
647 switch (ieee80211_vif_type_p2p(vif)) {
648 case NL80211_IFTYPE_ADHOC:
649 return le32_to_cpu(txq_timer->ibss);
650 case NL80211_IFTYPE_STATION:
651 return le32_to_cpu(txq_timer->bss);
652 case NL80211_IFTYPE_AP:
653 return le32_to_cpu(txq_timer->softap);
654 case NL80211_IFTYPE_P2P_CLIENT:
655 return le32_to_cpu(txq_timer->p2p_client);
656 case NL80211_IFTYPE_P2P_GO:
657 return le32_to_cpu(txq_timer->p2p_go);
658 case NL80211_IFTYPE_P2P_DEVICE:
659 return le32_to_cpu(txq_timer->p2p_device);
660 case NL80211_IFTYPE_MONITOR:
661 return default_timeout;
662 default:
663 WARN_ON(1);
664 return mvm->trans->trans_cfg->base_params->wd_timeout;
665 }
666}
667
668void iwl_mvm_connection_loss(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
669 const char *errmsg)
670{
671 struct iwl_fw_dbg_trigger_tlv *trig;
672 struct iwl_fw_dbg_trigger_mlme *trig_mlme;
673
674 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, ieee80211_vif_to_wdev(vif),
675 FW_DBG_TRIGGER_MLME);
676 if (!trig)
677 goto out;
678
679 trig_mlme = (void *)trig->data;
680
681 if (trig_mlme->stop_connection_loss &&
682 --trig_mlme->stop_connection_loss)
683 goto out;
684
685 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, "%s", errmsg);
686
687out:
688 ieee80211_connection_loss(vif);
689}
690
691void iwl_mvm_event_frame_timeout_callback(struct iwl_mvm *mvm,
692 struct ieee80211_vif *vif,
693 const struct ieee80211_sta *sta,
694 u16 tid)
695{
696 struct iwl_fw_dbg_trigger_tlv *trig;
697 struct iwl_fw_dbg_trigger_ba *ba_trig;
698
699 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, ieee80211_vif_to_wdev(vif),
700 FW_DBG_TRIGGER_BA);
701 if (!trig)
702 return;
703
704 ba_trig = (void *)trig->data;
705
706 if (!(le16_to_cpu(ba_trig->frame_timeout) & BIT(tid)))
707 return;
708
709 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
710 "Frame from %pM timed out, tid %d",
711 sta->addr, tid);
712}
713
714u8 iwl_mvm_tcm_load_percentage(u32 airtime, u32 elapsed)
715{
716 if (!elapsed)
717 return 0;
718
719 return (100 * airtime / elapsed) / USEC_PER_MSEC;
720}
721
722static enum iwl_mvm_traffic_load
723iwl_mvm_tcm_load(struct iwl_mvm *mvm, u32 airtime, unsigned long elapsed)
724{
725 u8 load = iwl_mvm_tcm_load_percentage(airtime, elapsed);
726
727 if (load > IWL_MVM_TCM_LOAD_HIGH_THRESH)
728 return IWL_MVM_TRAFFIC_HIGH;
729 if (load > IWL_MVM_TCM_LOAD_MEDIUM_THRESH)
730 return IWL_MVM_TRAFFIC_MEDIUM;
731
732 return IWL_MVM_TRAFFIC_LOW;
733}
734
735static void iwl_mvm_tcm_iter(void *_data, u8 *mac, struct ieee80211_vif *vif)
736{
737 struct iwl_mvm *mvm = _data;
738 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
739 bool low_latency, prev = mvmvif->low_latency & LOW_LATENCY_TRAFFIC;
740
741 if (mvmvif->id >= NUM_MAC_INDEX_DRIVER)
742 return;
743
744 low_latency = mvm->tcm.result.low_latency[mvmvif->id];
745
746 if (!mvm->tcm.result.change[mvmvif->id] &&
747 prev == low_latency) {
748 iwl_mvm_update_quotas(mvm, false, NULL);
749 return;
750 }
751
752 if (prev != low_latency) {
753 /* this sends traffic load and updates quota as well */
754 iwl_mvm_update_low_latency(mvm, vif, low_latency,
755 LOW_LATENCY_TRAFFIC);
756 } else {
757 iwl_mvm_update_quotas(mvm, false, NULL);
758 }
759}
760
761static void iwl_mvm_tcm_results(struct iwl_mvm *mvm)
762{
763 mutex_lock(&mvm->mutex);
764
765 ieee80211_iterate_active_interfaces(
766 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
767 iwl_mvm_tcm_iter, mvm);
768
769 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
770 iwl_mvm_config_scan(mvm);
771
772 mutex_unlock(&mvm->mutex);
773}
774
775static void iwl_mvm_tcm_uapsd_nonagg_detected_wk(struct work_struct *wk)
776{
777 struct iwl_mvm *mvm;
778 struct iwl_mvm_vif *mvmvif;
779 struct ieee80211_vif *vif;
780
781 mvmvif = container_of(wk, struct iwl_mvm_vif,
782 uapsd_nonagg_detected_wk.work);
783 vif = container_of((void *)mvmvif, struct ieee80211_vif, drv_priv);
784 mvm = mvmvif->mvm;
785
786 if (mvm->tcm.data[mvmvif->id].opened_rx_ba_sessions)
787 return;
788
789 /* remember that this AP is broken */
790 memcpy(mvm->uapsd_noagg_bssids[mvm->uapsd_noagg_bssid_write_idx].addr,
791 vif->bss_conf.bssid, ETH_ALEN);
792 mvm->uapsd_noagg_bssid_write_idx++;
793 if (mvm->uapsd_noagg_bssid_write_idx >= IWL_MVM_UAPSD_NOAGG_LIST_LEN)
794 mvm->uapsd_noagg_bssid_write_idx = 0;
795
796 iwl_mvm_connection_loss(mvm, vif,
797 "AP isn't using AMPDU with uAPSD enabled");
798}
799
800static void iwl_mvm_uapsd_agg_disconnect(struct iwl_mvm *mvm,
801 struct ieee80211_vif *vif)
802{
803 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
804
805 if (vif->type != NL80211_IFTYPE_STATION)
806 return;
807
808 if (!vif->bss_conf.assoc)
809 return;
810
811 if (!mvmvif->queue_params[IEEE80211_AC_VO].uapsd &&
812 !mvmvif->queue_params[IEEE80211_AC_VI].uapsd &&
813 !mvmvif->queue_params[IEEE80211_AC_BE].uapsd &&
814 !mvmvif->queue_params[IEEE80211_AC_BK].uapsd)
815 return;
816
817 if (mvm->tcm.data[mvmvif->id].uapsd_nonagg_detect.detected)
818 return;
819
820 mvm->tcm.data[mvmvif->id].uapsd_nonagg_detect.detected = true;
821 IWL_INFO(mvm,
822 "detected AP should do aggregation but isn't, likely due to U-APSD\n");
823 schedule_delayed_work(&mvmvif->uapsd_nonagg_detected_wk, 15 * HZ);
824}
825
826static void iwl_mvm_check_uapsd_agg_expected_tpt(struct iwl_mvm *mvm,
827 unsigned int elapsed,
828 int mac)
829{
830 u64 bytes = mvm->tcm.data[mac].uapsd_nonagg_detect.rx_bytes;
831 u64 tpt;
832 unsigned long rate;
833 struct ieee80211_vif *vif;
834
835 rate = ewma_rate_read(&mvm->tcm.data[mac].uapsd_nonagg_detect.rate);
836
837 if (!rate || mvm->tcm.data[mac].opened_rx_ba_sessions ||
838 mvm->tcm.data[mac].uapsd_nonagg_detect.detected)
839 return;
840
841 if (iwl_mvm_has_new_rx_api(mvm)) {
842 tpt = 8 * bytes; /* kbps */
843 do_div(tpt, elapsed);
844 rate *= 1000; /* kbps */
845 if (tpt < 22 * rate / 100)
846 return;
847 } else {
848 /*
849 * the rate here is actually the threshold, in 100Kbps units,
850 * so do the needed conversion from bytes to 100Kbps:
851 * 100kb = bits / (100 * 1000),
852 * 100kbps = 100kb / (msecs / 1000) ==
853 * (bits / (100 * 1000)) / (msecs / 1000) ==
854 * bits / (100 * msecs)
855 */
856 tpt = (8 * bytes);
857 do_div(tpt, elapsed * 100);
858 if (tpt < rate)
859 return;
860 }
861
862 rcu_read_lock();
863 vif = rcu_dereference(mvm->vif_id_to_mac[mac]);
864 if (vif)
865 iwl_mvm_uapsd_agg_disconnect(mvm, vif);
866 rcu_read_unlock();
867}
868
869static void iwl_mvm_tcm_iterator(void *_data, u8 *mac,
870 struct ieee80211_vif *vif)
871{
872 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
873 u32 *band = _data;
874
875 if (!mvmvif->phy_ctxt)
876 return;
877
878 band[mvmvif->id] = mvmvif->phy_ctxt->channel->band;
879}
880
881static unsigned long iwl_mvm_calc_tcm_stats(struct iwl_mvm *mvm,
882 unsigned long ts,
883 bool handle_uapsd)
884{
885 unsigned int elapsed = jiffies_to_msecs(ts - mvm->tcm.ts);
886 unsigned int uapsd_elapsed =
887 jiffies_to_msecs(ts - mvm->tcm.uapsd_nonagg_ts);
888 u32 total_airtime = 0;
889 u32 band_airtime[NUM_NL80211_BANDS] = {0};
890 u32 band[NUM_MAC_INDEX_DRIVER] = {0};
891 int ac, mac, i;
892 bool low_latency = false;
893 enum iwl_mvm_traffic_load load, band_load;
894 bool handle_ll = time_after(ts, mvm->tcm.ll_ts + MVM_LL_PERIOD);
895
896 if (handle_ll)
897 mvm->tcm.ll_ts = ts;
898 if (handle_uapsd)
899 mvm->tcm.uapsd_nonagg_ts = ts;
900
901 mvm->tcm.result.elapsed = elapsed;
902
903 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
904 IEEE80211_IFACE_ITER_NORMAL,
905 iwl_mvm_tcm_iterator,
906 &band);
907
908 for (mac = 0; mac < NUM_MAC_INDEX_DRIVER; mac++) {
909 struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[mac];
910 u32 vo_vi_pkts = 0;
911 u32 airtime = mdata->rx.airtime + mdata->tx.airtime;
912
913 total_airtime += airtime;
914 band_airtime[band[mac]] += airtime;
915
916 load = iwl_mvm_tcm_load(mvm, airtime, elapsed);
917 mvm->tcm.result.change[mac] = load != mvm->tcm.result.load[mac];
918 mvm->tcm.result.load[mac] = load;
919 mvm->tcm.result.airtime[mac] = airtime;
920
921 for (ac = IEEE80211_AC_VO; ac <= IEEE80211_AC_VI; ac++)
922 vo_vi_pkts += mdata->rx.pkts[ac] +
923 mdata->tx.pkts[ac];
924
925 /* enable immediately with enough packets but defer disabling */
926 if (vo_vi_pkts > IWL_MVM_TCM_LOWLAT_ENABLE_THRESH)
927 mvm->tcm.result.low_latency[mac] = true;
928 else if (handle_ll)
929 mvm->tcm.result.low_latency[mac] = false;
930
931 if (handle_ll) {
932 /* clear old data */
933 memset(&mdata->rx.pkts, 0, sizeof(mdata->rx.pkts));
934 memset(&mdata->tx.pkts, 0, sizeof(mdata->tx.pkts));
935 }
936 low_latency |= mvm->tcm.result.low_latency[mac];
937
938 if (!mvm->tcm.result.low_latency[mac] && handle_uapsd)
939 iwl_mvm_check_uapsd_agg_expected_tpt(mvm, uapsd_elapsed,
940 mac);
941 /* clear old data */
942 if (handle_uapsd)
943 mdata->uapsd_nonagg_detect.rx_bytes = 0;
944 memset(&mdata->rx.airtime, 0, sizeof(mdata->rx.airtime));
945 memset(&mdata->tx.airtime, 0, sizeof(mdata->tx.airtime));
946 }
947
948 load = iwl_mvm_tcm_load(mvm, total_airtime, elapsed);
949 mvm->tcm.result.global_load = load;
950
951 for (i = 0; i < NUM_NL80211_BANDS; i++) {
952 band_load = iwl_mvm_tcm_load(mvm, band_airtime[i], elapsed);
953 mvm->tcm.result.band_load[i] = band_load;
954 }
955
956 /*
957 * If the current load isn't low we need to force re-evaluation
958 * in the TCM period, so that we can return to low load if there
959 * was no traffic at all (and thus iwl_mvm_recalc_tcm didn't get
960 * triggered by traffic).
961 */
962 if (load != IWL_MVM_TRAFFIC_LOW)
963 return MVM_TCM_PERIOD;
964 /*
965 * If low-latency is active we need to force re-evaluation after
966 * (the longer) MVM_LL_PERIOD, so that we can disable low-latency
967 * when there's no traffic at all.
968 */
969 if (low_latency)
970 return MVM_LL_PERIOD;
971 /*
972 * Otherwise, we don't need to run the work struct because we're
973 * in the default "idle" state - traffic indication is low (which
974 * also covers the "no traffic" case) and low-latency is disabled
975 * so there's no state that may need to be disabled when there's
976 * no traffic at all.
977 *
978 * Note that this has no impact on the regular scheduling of the
979 * updates triggered by traffic - those happen whenever one of the
980 * two timeouts expire (if there's traffic at all.)
981 */
982 return 0;
983}
984
985void iwl_mvm_recalc_tcm(struct iwl_mvm *mvm)
986{
987 unsigned long ts = jiffies;
988 bool handle_uapsd =
989 time_after(ts, mvm->tcm.uapsd_nonagg_ts +
990 msecs_to_jiffies(IWL_MVM_UAPSD_NONAGG_PERIOD));
991
992 spin_lock(&mvm->tcm.lock);
993 if (mvm->tcm.paused || !time_after(ts, mvm->tcm.ts + MVM_TCM_PERIOD)) {
994 spin_unlock(&mvm->tcm.lock);
995 return;
996 }
997 spin_unlock(&mvm->tcm.lock);
998
999 if (handle_uapsd && iwl_mvm_has_new_rx_api(mvm)) {
1000 mutex_lock(&mvm->mutex);
1001 if (iwl_mvm_request_statistics(mvm, true))
1002 handle_uapsd = false;
1003 mutex_unlock(&mvm->mutex);
1004 }
1005
1006 spin_lock(&mvm->tcm.lock);
1007 /* re-check if somebody else won the recheck race */
1008 if (!mvm->tcm.paused && time_after(ts, mvm->tcm.ts + MVM_TCM_PERIOD)) {
1009 /* calculate statistics */
1010 unsigned long work_delay = iwl_mvm_calc_tcm_stats(mvm, ts,
1011 handle_uapsd);
1012
1013 /* the memset needs to be visible before the timestamp */
1014 smp_mb();
1015 mvm->tcm.ts = ts;
1016 if (work_delay)
1017 schedule_delayed_work(&mvm->tcm.work, work_delay);
1018 }
1019 spin_unlock(&mvm->tcm.lock);
1020
1021 iwl_mvm_tcm_results(mvm);
1022}
1023
1024void iwl_mvm_tcm_work(struct work_struct *work)
1025{
1026 struct delayed_work *delayed_work = to_delayed_work(work);
1027 struct iwl_mvm *mvm = container_of(delayed_work, struct iwl_mvm,
1028 tcm.work);
1029
1030 iwl_mvm_recalc_tcm(mvm);
1031}
1032
1033void iwl_mvm_pause_tcm(struct iwl_mvm *mvm, bool with_cancel)
1034{
1035 spin_lock_bh(&mvm->tcm.lock);
1036 mvm->tcm.paused = true;
1037 spin_unlock_bh(&mvm->tcm.lock);
1038 if (with_cancel)
1039 cancel_delayed_work_sync(&mvm->tcm.work);
1040}
1041
1042void iwl_mvm_resume_tcm(struct iwl_mvm *mvm)
1043{
1044 int mac;
1045 bool low_latency = false;
1046
1047 spin_lock_bh(&mvm->tcm.lock);
1048 mvm->tcm.ts = jiffies;
1049 mvm->tcm.ll_ts = jiffies;
1050 for (mac = 0; mac < NUM_MAC_INDEX_DRIVER; mac++) {
1051 struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[mac];
1052
1053 memset(&mdata->rx.pkts, 0, sizeof(mdata->rx.pkts));
1054 memset(&mdata->tx.pkts, 0, sizeof(mdata->tx.pkts));
1055 memset(&mdata->rx.airtime, 0, sizeof(mdata->rx.airtime));
1056 memset(&mdata->tx.airtime, 0, sizeof(mdata->tx.airtime));
1057
1058 if (mvm->tcm.result.low_latency[mac])
1059 low_latency = true;
1060 }
1061 /* The TCM data needs to be reset before "paused" flag changes */
1062 smp_mb();
1063 mvm->tcm.paused = false;
1064
1065 /*
1066 * if the current load is not low or low latency is active, force
1067 * re-evaluation to cover the case of no traffic.
1068 */
1069 if (mvm->tcm.result.global_load > IWL_MVM_TRAFFIC_LOW)
1070 schedule_delayed_work(&mvm->tcm.work, MVM_TCM_PERIOD);
1071 else if (low_latency)
1072 schedule_delayed_work(&mvm->tcm.work, MVM_LL_PERIOD);
1073
1074 spin_unlock_bh(&mvm->tcm.lock);
1075}
1076
1077void iwl_mvm_tcm_add_vif(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1078{
1079 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1080
1081 INIT_DELAYED_WORK(&mvmvif->uapsd_nonagg_detected_wk,
1082 iwl_mvm_tcm_uapsd_nonagg_detected_wk);
1083}
1084
1085void iwl_mvm_tcm_rm_vif(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1086{
1087 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1088
1089 cancel_delayed_work_sync(&mvmvif->uapsd_nonagg_detected_wk);
1090}
1091
1092u32 iwl_mvm_get_systime(struct iwl_mvm *mvm)
1093{
1094 u32 reg_addr = DEVICE_SYSTEM_TIME_REG;
1095
1096 if (mvm->trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_22000 &&
1097 mvm->trans->cfg->gp2_reg_addr)
1098 reg_addr = mvm->trans->cfg->gp2_reg_addr;
1099
1100 return iwl_read_prph(mvm->trans, reg_addr);
1101}
1102
1103void iwl_mvm_get_sync_time(struct iwl_mvm *mvm, int clock_type,
1104 u32 *gp2, u64 *boottime, ktime_t *realtime)
1105{
1106 bool ps_disabled;
1107
1108 lockdep_assert_held(&mvm->mutex);
1109
1110 /* Disable power save when reading GP2 */
1111 ps_disabled = mvm->ps_disabled;
1112 if (!ps_disabled) {
1113 mvm->ps_disabled = true;
1114 iwl_mvm_power_update_device(mvm);
1115 }
1116
1117 *gp2 = iwl_mvm_get_systime(mvm);
1118
1119 if (clock_type == CLOCK_BOOTTIME && boottime)
1120 *boottime = ktime_get_boottime_ns();
1121 else if (clock_type == CLOCK_REALTIME && realtime)
1122 *realtime = ktime_get_real();
1123
1124 if (!ps_disabled) {
1125 mvm->ps_disabled = ps_disabled;
1126 iwl_mvm_power_update_device(mvm);
1127 }
1128}