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1// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2/*
3 * Copyright (C) 2012-2014, 2018-2024 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 *
253 * Returns: an error code indicating success or failure
254 */
255int iwl_mvm_send_lq_cmd(struct iwl_mvm *mvm, struct iwl_lq_cmd *lq)
256{
257 struct iwl_host_cmd cmd = {
258 .id = LQ_CMD,
259 .len = { sizeof(struct iwl_lq_cmd), },
260 .flags = CMD_ASYNC,
261 .data = { lq, },
262 };
263
264 if (WARN_ON(lq->sta_id == IWL_INVALID_STA ||
265 iwl_mvm_has_tlc_offload(mvm)))
266 return -EINVAL;
267
268 return iwl_mvm_send_cmd(mvm, &cmd);
269}
270
271/**
272 * iwl_mvm_update_smps - Get a request to change the SMPS mode
273 * @mvm: Driver data.
274 * @vif: Pointer to the ieee80211_vif structure
275 * @req_type: The part of the driver who call for a change.
276 * @smps_request: The request to change the SMPS mode.
277 * @link_id: for MLO link_id, otherwise 0 (deflink)
278 *
279 * Get a requst to change the SMPS mode,
280 * and change it according to all other requests in the driver.
281 */
282void iwl_mvm_update_smps(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
283 enum iwl_mvm_smps_type_request req_type,
284 enum ieee80211_smps_mode smps_request,
285 unsigned int link_id)
286{
287 struct iwl_mvm_vif *mvmvif;
288 enum ieee80211_smps_mode smps_mode = IEEE80211_SMPS_AUTOMATIC;
289 int i;
290
291 lockdep_assert_held(&mvm->mutex);
292
293 /* SMPS is irrelevant for NICs that don't have at least 2 RX antenna */
294 if (num_of_ant(iwl_mvm_get_valid_rx_ant(mvm)) == 1)
295 return;
296
297 if (vif->type != NL80211_IFTYPE_STATION)
298 return;
299
300 /* SMPS is handled by firmware */
301 if (iwl_mvm_has_rlc_offload(mvm))
302 return;
303
304 mvmvif = iwl_mvm_vif_from_mac80211(vif);
305
306 if (WARN_ON_ONCE(!mvmvif->link[link_id]))
307 return;
308
309 mvmvif->link[link_id]->smps_requests[req_type] = smps_request;
310 for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++) {
311 if (mvmvif->link[link_id]->smps_requests[i] ==
312 IEEE80211_SMPS_STATIC) {
313 smps_mode = IEEE80211_SMPS_STATIC;
314 break;
315 }
316 if (mvmvif->link[link_id]->smps_requests[i] ==
317 IEEE80211_SMPS_DYNAMIC)
318 smps_mode = IEEE80211_SMPS_DYNAMIC;
319 }
320
321 /* SMPS is disabled in eSR */
322 if (mvmvif->esr_active)
323 smps_mode = IEEE80211_SMPS_OFF;
324
325 ieee80211_request_smps(vif, link_id, smps_mode);
326}
327
328void iwl_mvm_update_smps_on_active_links(struct iwl_mvm *mvm,
329 struct ieee80211_vif *vif,
330 enum iwl_mvm_smps_type_request req_type,
331 enum ieee80211_smps_mode smps_request)
332{
333 struct ieee80211_bss_conf *link_conf;
334 unsigned int link_id;
335
336 rcu_read_lock();
337 for_each_vif_active_link(vif, link_conf, link_id)
338 iwl_mvm_update_smps(mvm, vif, req_type, smps_request,
339 link_id);
340 rcu_read_unlock();
341}
342
343static bool iwl_wait_stats_complete(struct iwl_notif_wait_data *notif_wait,
344 struct iwl_rx_packet *pkt, void *data)
345{
346 WARN_ON(pkt->hdr.cmd != STATISTICS_NOTIFICATION);
347
348 return true;
349}
350
351#define PERIODIC_STAT_RATE 5
352
353int iwl_mvm_request_periodic_system_statistics(struct iwl_mvm *mvm, bool enable)
354{
355 u32 flags = enable ? 0 : IWL_STATS_CFG_FLG_DISABLE_NTFY_MSK;
356 u32 type = enable ? (IWL_STATS_NTFY_TYPE_ID_OPER |
357 IWL_STATS_NTFY_TYPE_ID_OPER_PART1) : 0;
358 struct iwl_system_statistics_cmd system_cmd = {
359 .cfg_mask = cpu_to_le32(flags),
360 .config_time_sec = cpu_to_le32(enable ?
361 PERIODIC_STAT_RATE : 0),
362 .type_id_mask = cpu_to_le32(type),
363 };
364
365 return iwl_mvm_send_cmd_pdu(mvm,
366 WIDE_ID(SYSTEM_GROUP,
367 SYSTEM_STATISTICS_CMD),
368 0, sizeof(system_cmd), &system_cmd);
369}
370
371static int iwl_mvm_request_system_statistics(struct iwl_mvm *mvm, bool clear,
372 u8 cmd_ver)
373{
374 struct iwl_system_statistics_cmd system_cmd = {
375 .cfg_mask = clear ?
376 cpu_to_le32(IWL_STATS_CFG_FLG_ON_DEMAND_NTFY_MSK) :
377 cpu_to_le32(IWL_STATS_CFG_FLG_RESET_MSK |
378 IWL_STATS_CFG_FLG_ON_DEMAND_NTFY_MSK),
379 .type_id_mask = cpu_to_le32(IWL_STATS_NTFY_TYPE_ID_OPER |
380 IWL_STATS_NTFY_TYPE_ID_OPER_PART1),
381 };
382 struct iwl_host_cmd cmd = {
383 .id = WIDE_ID(SYSTEM_GROUP, SYSTEM_STATISTICS_CMD),
384 .len[0] = sizeof(system_cmd),
385 .data[0] = &system_cmd,
386 };
387 struct iwl_notification_wait stats_wait;
388 static const u16 stats_complete[] = {
389 WIDE_ID(SYSTEM_GROUP, SYSTEM_STATISTICS_END_NOTIF),
390 };
391 int ret;
392
393 if (cmd_ver != 1) {
394 IWL_FW_CHECK_FAILED(mvm,
395 "Invalid system statistics command version:%d\n",
396 cmd_ver);
397 return -EOPNOTSUPP;
398 }
399
400 iwl_init_notification_wait(&mvm->notif_wait, &stats_wait,
401 stats_complete, ARRAY_SIZE(stats_complete),
402 NULL, NULL);
403
404 mvm->statistics_clear = clear;
405 ret = iwl_mvm_send_cmd(mvm, &cmd);
406 if (ret) {
407 iwl_remove_notification(&mvm->notif_wait, &stats_wait);
408 return ret;
409 }
410
411 /* 500ms for OPERATIONAL, PART1 and END notification should be enough
412 * for FW to collect data from all LMACs and send
413 * STATISTICS_NOTIFICATION to host
414 */
415 ret = iwl_wait_notification(&mvm->notif_wait, &stats_wait, HZ / 2);
416 if (ret)
417 return ret;
418
419 if (clear)
420 iwl_mvm_accu_radio_stats(mvm);
421
422 return ret;
423}
424
425int iwl_mvm_request_statistics(struct iwl_mvm *mvm, bool clear)
426{
427 struct iwl_statistics_cmd scmd = {
428 .flags = clear ? cpu_to_le32(IWL_STATISTICS_FLG_CLEAR) : 0,
429 };
430
431 struct iwl_host_cmd cmd = {
432 .id = STATISTICS_CMD,
433 .len[0] = sizeof(scmd),
434 .data[0] = &scmd,
435 };
436 u8 cmd_ver = iwl_fw_lookup_cmd_ver(mvm->fw,
437 WIDE_ID(SYSTEM_GROUP,
438 SYSTEM_STATISTICS_CMD),
439 IWL_FW_CMD_VER_UNKNOWN);
440 int ret;
441
442 /*
443 * Don't request statistics during restart, they'll not have any useful
444 * information right after restart, nor is clearing needed
445 */
446 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
447 return 0;
448
449 if (cmd_ver != IWL_FW_CMD_VER_UNKNOWN)
450 return iwl_mvm_request_system_statistics(mvm, clear, cmd_ver);
451
452 /* From version 15 - STATISTICS_NOTIFICATION, the reply for
453 * STATISTICS_CMD is empty, and the response is with
454 * STATISTICS_NOTIFICATION notification
455 */
456 if (iwl_fw_lookup_notif_ver(mvm->fw, LEGACY_GROUP,
457 STATISTICS_NOTIFICATION, 0) < 15) {
458 cmd.flags = CMD_WANT_SKB;
459
460 ret = iwl_mvm_send_cmd(mvm, &cmd);
461 if (ret)
462 return ret;
463
464 iwl_mvm_handle_rx_statistics(mvm, cmd.resp_pkt);
465 iwl_free_resp(&cmd);
466 } else {
467 struct iwl_notification_wait stats_wait;
468 static const u16 stats_complete[] = {
469 STATISTICS_NOTIFICATION,
470 };
471
472 iwl_init_notification_wait(&mvm->notif_wait, &stats_wait,
473 stats_complete, ARRAY_SIZE(stats_complete),
474 iwl_wait_stats_complete, NULL);
475
476 ret = iwl_mvm_send_cmd(mvm, &cmd);
477 if (ret) {
478 iwl_remove_notification(&mvm->notif_wait, &stats_wait);
479 return ret;
480 }
481
482 /* 200ms should be enough for FW to collect data from all
483 * LMACs and send STATISTICS_NOTIFICATION to host
484 */
485 ret = iwl_wait_notification(&mvm->notif_wait, &stats_wait, HZ / 5);
486 if (ret)
487 return ret;
488 }
489
490 if (clear)
491 iwl_mvm_accu_radio_stats(mvm);
492
493 return 0;
494}
495
496void iwl_mvm_accu_radio_stats(struct iwl_mvm *mvm)
497{
498 mvm->accu_radio_stats.rx_time += mvm->radio_stats.rx_time;
499 mvm->accu_radio_stats.tx_time += mvm->radio_stats.tx_time;
500 mvm->accu_radio_stats.on_time_rf += mvm->radio_stats.on_time_rf;
501 mvm->accu_radio_stats.on_time_scan += mvm->radio_stats.on_time_scan;
502}
503
504struct iwl_mvm_diversity_iter_data {
505 struct iwl_mvm_phy_ctxt *ctxt;
506 bool result;
507};
508
509static void iwl_mvm_diversity_iter(void *_data, u8 *mac,
510 struct ieee80211_vif *vif)
511{
512 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
513 struct iwl_mvm_diversity_iter_data *data = _data;
514 int i, link_id;
515
516 for_each_mvm_vif_valid_link(mvmvif, link_id) {
517 struct iwl_mvm_vif_link_info *link_info = mvmvif->link[link_id];
518
519 if (link_info->phy_ctxt != data->ctxt)
520 continue;
521
522 for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++) {
523 if (link_info->smps_requests[i] == IEEE80211_SMPS_STATIC ||
524 link_info->smps_requests[i] == IEEE80211_SMPS_DYNAMIC) {
525 data->result = false;
526 break;
527 }
528 }
529 }
530}
531
532bool iwl_mvm_rx_diversity_allowed(struct iwl_mvm *mvm,
533 struct iwl_mvm_phy_ctxt *ctxt)
534{
535 struct iwl_mvm_diversity_iter_data data = {
536 .ctxt = ctxt,
537 .result = true,
538 };
539
540 lockdep_assert_held(&mvm->mutex);
541
542 if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
543 return false;
544
545 if (num_of_ant(iwl_mvm_get_valid_rx_ant(mvm)) == 1)
546 return false;
547
548 if (mvm->cfg->rx_with_siso_diversity)
549 return false;
550
551 ieee80211_iterate_active_interfaces_atomic(
552 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
553 iwl_mvm_diversity_iter, &data);
554
555 return data.result;
556}
557
558void iwl_mvm_send_low_latency_cmd(struct iwl_mvm *mvm,
559 bool low_latency, u16 mac_id)
560{
561 struct iwl_mac_low_latency_cmd cmd = {
562 .mac_id = cpu_to_le32(mac_id)
563 };
564
565 if (!fw_has_capa(&mvm->fw->ucode_capa,
566 IWL_UCODE_TLV_CAPA_DYNAMIC_QUOTA))
567 return;
568
569 if (low_latency) {
570 /* currently we don't care about the direction */
571 cmd.low_latency_rx = 1;
572 cmd.low_latency_tx = 1;
573 }
574
575 if (iwl_mvm_send_cmd_pdu(mvm, WIDE_ID(MAC_CONF_GROUP, LOW_LATENCY_CMD),
576 0, sizeof(cmd), &cmd))
577 IWL_ERR(mvm, "Failed to send low latency command\n");
578}
579
580int iwl_mvm_update_low_latency(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
581 bool low_latency,
582 enum iwl_mvm_low_latency_cause cause)
583{
584 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
585 int res;
586 bool prev;
587
588 lockdep_assert_held(&mvm->mutex);
589
590 prev = iwl_mvm_vif_low_latency(mvmvif);
591 iwl_mvm_vif_set_low_latency(mvmvif, low_latency, cause);
592
593 low_latency = iwl_mvm_vif_low_latency(mvmvif);
594
595 if (low_latency == prev)
596 return 0;
597
598 iwl_mvm_send_low_latency_cmd(mvm, low_latency, mvmvif->id);
599
600 res = iwl_mvm_update_quotas(mvm, false, NULL);
601 if (res)
602 return res;
603
604 iwl_mvm_bt_coex_vif_change(mvm);
605
606 return iwl_mvm_power_update_mac(mvm);
607}
608
609struct iwl_mvm_low_latency_iter {
610 bool result;
611 bool result_per_band[NUM_NL80211_BANDS];
612};
613
614static void iwl_mvm_ll_iter(void *_data, u8 *mac, struct ieee80211_vif *vif)
615{
616 struct iwl_mvm_low_latency_iter *result = _data;
617 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
618 enum nl80211_band band;
619
620 if (iwl_mvm_vif_low_latency(mvmvif)) {
621 result->result = true;
622
623 if (!mvmvif->deflink.phy_ctxt)
624 return;
625
626 band = mvmvif->deflink.phy_ctxt->channel->band;
627 result->result_per_band[band] = true;
628 }
629}
630
631bool iwl_mvm_low_latency(struct iwl_mvm *mvm)
632{
633 struct iwl_mvm_low_latency_iter data = {};
634
635 ieee80211_iterate_active_interfaces_atomic(
636 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
637 iwl_mvm_ll_iter, &data);
638
639 return data.result;
640}
641
642bool iwl_mvm_low_latency_band(struct iwl_mvm *mvm, enum nl80211_band band)
643{
644 struct iwl_mvm_low_latency_iter data = {};
645
646 ieee80211_iterate_active_interfaces_atomic(
647 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
648 iwl_mvm_ll_iter, &data);
649
650 return data.result_per_band[band];
651}
652
653struct iwl_bss_iter_data {
654 struct ieee80211_vif *vif;
655 bool error;
656};
657
658static void iwl_mvm_bss_iface_iterator(void *_data, u8 *mac,
659 struct ieee80211_vif *vif)
660{
661 struct iwl_bss_iter_data *data = _data;
662
663 if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
664 return;
665
666 if (data->vif) {
667 data->error = true;
668 return;
669 }
670
671 data->vif = vif;
672}
673
674struct ieee80211_vif *iwl_mvm_get_bss_vif(struct iwl_mvm *mvm)
675{
676 struct iwl_bss_iter_data bss_iter_data = {};
677
678 ieee80211_iterate_active_interfaces_atomic(
679 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
680 iwl_mvm_bss_iface_iterator, &bss_iter_data);
681
682 if (bss_iter_data.error)
683 return ERR_PTR(-EINVAL);
684
685 return bss_iter_data.vif;
686}
687
688struct iwl_bss_find_iter_data {
689 struct ieee80211_vif *vif;
690 u32 macid;
691};
692
693static void iwl_mvm_bss_find_iface_iterator(void *_data, u8 *mac,
694 struct ieee80211_vif *vif)
695{
696 struct iwl_bss_find_iter_data *data = _data;
697 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
698
699 if (mvmvif->id == data->macid)
700 data->vif = vif;
701}
702
703struct ieee80211_vif *iwl_mvm_get_vif_by_macid(struct iwl_mvm *mvm, u32 macid)
704{
705 struct iwl_bss_find_iter_data data = {
706 .macid = macid,
707 };
708
709 lockdep_assert_held(&mvm->mutex);
710
711 ieee80211_iterate_active_interfaces_atomic(
712 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
713 iwl_mvm_bss_find_iface_iterator, &data);
714
715 return data.vif;
716}
717
718struct iwl_sta_iter_data {
719 bool assoc;
720};
721
722static void iwl_mvm_sta_iface_iterator(void *_data, u8 *mac,
723 struct ieee80211_vif *vif)
724{
725 struct iwl_sta_iter_data *data = _data;
726
727 if (vif->type != NL80211_IFTYPE_STATION)
728 return;
729
730 if (vif->cfg.assoc)
731 data->assoc = true;
732}
733
734bool iwl_mvm_is_vif_assoc(struct iwl_mvm *mvm)
735{
736 struct iwl_sta_iter_data data = {
737 .assoc = false,
738 };
739
740 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
741 IEEE80211_IFACE_ITER_NORMAL,
742 iwl_mvm_sta_iface_iterator,
743 &data);
744 return data.assoc;
745}
746
747unsigned int iwl_mvm_get_wd_timeout(struct iwl_mvm *mvm,
748 struct ieee80211_vif *vif)
749{
750 unsigned int default_timeout =
751 mvm->trans->trans_cfg->base_params->wd_timeout;
752
753 /*
754 * We can't know when the station is asleep or awake, so we
755 * must disable the queue hang detection.
756 */
757 if (fw_has_capa(&mvm->fw->ucode_capa,
758 IWL_UCODE_TLV_CAPA_STA_PM_NOTIF) &&
759 vif->type == NL80211_IFTYPE_AP)
760 return IWL_WATCHDOG_DISABLED;
761 return default_timeout;
762}
763
764void iwl_mvm_connection_loss(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
765 const char *errmsg)
766{
767 struct iwl_fw_dbg_trigger_tlv *trig;
768 struct iwl_fw_dbg_trigger_mlme *trig_mlme;
769
770 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, ieee80211_vif_to_wdev(vif),
771 FW_DBG_TRIGGER_MLME);
772 if (!trig)
773 goto out;
774
775 trig_mlme = (void *)trig->data;
776
777 if (trig_mlme->stop_connection_loss &&
778 --trig_mlme->stop_connection_loss)
779 goto out;
780
781 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, "%s", errmsg);
782
783out:
784 ieee80211_connection_loss(vif);
785}
786
787void iwl_mvm_event_frame_timeout_callback(struct iwl_mvm *mvm,
788 struct ieee80211_vif *vif,
789 const struct ieee80211_sta *sta,
790 u16 tid)
791{
792 struct iwl_fw_dbg_trigger_tlv *trig;
793 struct iwl_fw_dbg_trigger_ba *ba_trig;
794
795 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, ieee80211_vif_to_wdev(vif),
796 FW_DBG_TRIGGER_BA);
797 if (!trig)
798 return;
799
800 ba_trig = (void *)trig->data;
801
802 if (!(le16_to_cpu(ba_trig->frame_timeout) & BIT(tid)))
803 return;
804
805 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
806 "Frame from %pM timed out, tid %d",
807 sta->addr, tid);
808}
809
810u8 iwl_mvm_tcm_load_percentage(u32 airtime, u32 elapsed)
811{
812 if (!elapsed)
813 return 0;
814
815 return (100 * airtime / elapsed) / USEC_PER_MSEC;
816}
817
818static enum iwl_mvm_traffic_load
819iwl_mvm_tcm_load(struct iwl_mvm *mvm, u32 airtime, unsigned long elapsed)
820{
821 u8 load = iwl_mvm_tcm_load_percentage(airtime, elapsed);
822
823 if (load > IWL_MVM_TCM_LOAD_HIGH_THRESH)
824 return IWL_MVM_TRAFFIC_HIGH;
825 if (load > IWL_MVM_TCM_LOAD_MEDIUM_THRESH)
826 return IWL_MVM_TRAFFIC_MEDIUM;
827
828 return IWL_MVM_TRAFFIC_LOW;
829}
830
831static void iwl_mvm_tcm_iter(void *_data, u8 *mac, struct ieee80211_vif *vif)
832{
833 struct iwl_mvm *mvm = _data;
834 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
835 bool low_latency, prev = mvmvif->low_latency & LOW_LATENCY_TRAFFIC;
836
837 if (mvmvif->id >= NUM_MAC_INDEX_DRIVER)
838 return;
839
840 low_latency = mvm->tcm.result.low_latency[mvmvif->id];
841
842 if (!mvm->tcm.result.change[mvmvif->id] &&
843 prev == low_latency) {
844 iwl_mvm_update_quotas(mvm, false, NULL);
845 return;
846 }
847
848 if (prev != low_latency) {
849 /* this sends traffic load and updates quota as well */
850 iwl_mvm_update_low_latency(mvm, vif, low_latency,
851 LOW_LATENCY_TRAFFIC);
852 } else {
853 iwl_mvm_update_quotas(mvm, false, NULL);
854 }
855}
856
857static void iwl_mvm_tcm_results(struct iwl_mvm *mvm)
858{
859 guard(mvm)(mvm);
860
861 ieee80211_iterate_active_interfaces(
862 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
863 iwl_mvm_tcm_iter, mvm);
864
865 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
866 iwl_mvm_config_scan(mvm);
867}
868
869static void iwl_mvm_tcm_uapsd_nonagg_detected_wk(struct work_struct *wk)
870{
871 struct iwl_mvm *mvm;
872 struct iwl_mvm_vif *mvmvif;
873 struct ieee80211_vif *vif;
874
875 mvmvif = container_of(wk, struct iwl_mvm_vif,
876 uapsd_nonagg_detected_wk.work);
877 vif = container_of((void *)mvmvif, struct ieee80211_vif, drv_priv);
878 mvm = mvmvif->mvm;
879
880 if (mvm->tcm.data[mvmvif->id].opened_rx_ba_sessions)
881 return;
882
883 /* remember that this AP is broken */
884 memcpy(mvm->uapsd_noagg_bssids[mvm->uapsd_noagg_bssid_write_idx].addr,
885 vif->bss_conf.bssid, ETH_ALEN);
886 mvm->uapsd_noagg_bssid_write_idx++;
887 if (mvm->uapsd_noagg_bssid_write_idx >= IWL_MVM_UAPSD_NOAGG_LIST_LEN)
888 mvm->uapsd_noagg_bssid_write_idx = 0;
889
890 iwl_mvm_connection_loss(mvm, vif,
891 "AP isn't using AMPDU with uAPSD enabled");
892}
893
894static void iwl_mvm_uapsd_agg_disconnect(struct iwl_mvm *mvm,
895 struct ieee80211_vif *vif)
896{
897 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
898
899 if (vif->type != NL80211_IFTYPE_STATION)
900 return;
901
902 if (!vif->cfg.assoc)
903 return;
904
905 if (!mvmvif->deflink.queue_params[IEEE80211_AC_VO].uapsd &&
906 !mvmvif->deflink.queue_params[IEEE80211_AC_VI].uapsd &&
907 !mvmvif->deflink.queue_params[IEEE80211_AC_BE].uapsd &&
908 !mvmvif->deflink.queue_params[IEEE80211_AC_BK].uapsd)
909 return;
910
911 if (mvm->tcm.data[mvmvif->id].uapsd_nonagg_detect.detected)
912 return;
913
914 mvm->tcm.data[mvmvif->id].uapsd_nonagg_detect.detected = true;
915 IWL_INFO(mvm,
916 "detected AP should do aggregation but isn't, likely due to U-APSD\n");
917 schedule_delayed_work(&mvmvif->uapsd_nonagg_detected_wk,
918 15 * HZ);
919}
920
921static void iwl_mvm_check_uapsd_agg_expected_tpt(struct iwl_mvm *mvm,
922 unsigned int elapsed,
923 int mac)
924{
925 u64 bytes = mvm->tcm.data[mac].uapsd_nonagg_detect.rx_bytes;
926 u64 tpt;
927 unsigned long rate;
928 struct ieee80211_vif *vif;
929
930 rate = ewma_rate_read(&mvm->tcm.data[mac].uapsd_nonagg_detect.rate);
931
932 if (!rate || mvm->tcm.data[mac].opened_rx_ba_sessions ||
933 mvm->tcm.data[mac].uapsd_nonagg_detect.detected)
934 return;
935
936 if (iwl_mvm_has_new_rx_api(mvm)) {
937 tpt = 8 * bytes; /* kbps */
938 do_div(tpt, elapsed);
939 rate *= 1000; /* kbps */
940 if (tpt < 22 * rate / 100)
941 return;
942 } else {
943 /*
944 * the rate here is actually the threshold, in 100Kbps units,
945 * so do the needed conversion from bytes to 100Kbps:
946 * 100kb = bits / (100 * 1000),
947 * 100kbps = 100kb / (msecs / 1000) ==
948 * (bits / (100 * 1000)) / (msecs / 1000) ==
949 * bits / (100 * msecs)
950 */
951 tpt = (8 * bytes);
952 do_div(tpt, elapsed * 100);
953 if (tpt < rate)
954 return;
955 }
956
957 rcu_read_lock();
958 vif = rcu_dereference(mvm->vif_id_to_mac[mac]);
959 if (vif)
960 iwl_mvm_uapsd_agg_disconnect(mvm, vif);
961 rcu_read_unlock();
962}
963
964static void iwl_mvm_tcm_iterator(void *_data, u8 *mac,
965 struct ieee80211_vif *vif)
966{
967 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
968 u32 *band = _data;
969
970 if (!mvmvif->deflink.phy_ctxt)
971 return;
972
973 band[mvmvif->id] = mvmvif->deflink.phy_ctxt->channel->band;
974}
975
976static unsigned long iwl_mvm_calc_tcm_stats(struct iwl_mvm *mvm,
977 unsigned long ts,
978 bool handle_uapsd)
979{
980 unsigned int elapsed = jiffies_to_msecs(ts - mvm->tcm.ts);
981 unsigned int uapsd_elapsed =
982 jiffies_to_msecs(ts - mvm->tcm.uapsd_nonagg_ts);
983 u32 total_airtime = 0;
984 u32 band_airtime[NUM_NL80211_BANDS] = {0};
985 u32 band[NUM_MAC_INDEX_DRIVER] = {0};
986 int ac, mac, i;
987 bool low_latency = false;
988 enum iwl_mvm_traffic_load load, band_load;
989 bool handle_ll = time_after(ts, mvm->tcm.ll_ts + MVM_LL_PERIOD);
990
991 if (handle_ll)
992 mvm->tcm.ll_ts = ts;
993 if (handle_uapsd)
994 mvm->tcm.uapsd_nonagg_ts = ts;
995
996 mvm->tcm.result.elapsed = elapsed;
997
998 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
999 IEEE80211_IFACE_ITER_NORMAL,
1000 iwl_mvm_tcm_iterator,
1001 &band);
1002
1003 for (mac = 0; mac < NUM_MAC_INDEX_DRIVER; mac++) {
1004 struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[mac];
1005 u32 vo_vi_pkts = 0;
1006 u32 airtime = mdata->rx.airtime + mdata->tx.airtime;
1007
1008 total_airtime += airtime;
1009 band_airtime[band[mac]] += airtime;
1010
1011 load = iwl_mvm_tcm_load(mvm, airtime, elapsed);
1012 mvm->tcm.result.change[mac] = load != mvm->tcm.result.load[mac];
1013 mvm->tcm.result.load[mac] = load;
1014 mvm->tcm.result.airtime[mac] = airtime;
1015
1016 for (ac = IEEE80211_AC_VO; ac <= IEEE80211_AC_VI; ac++)
1017 vo_vi_pkts += mdata->rx.pkts[ac] +
1018 mdata->tx.pkts[ac];
1019
1020 /* enable immediately with enough packets but defer disabling */
1021 if (vo_vi_pkts > IWL_MVM_TCM_LOWLAT_ENABLE_THRESH)
1022 mvm->tcm.result.low_latency[mac] = true;
1023 else if (handle_ll)
1024 mvm->tcm.result.low_latency[mac] = false;
1025
1026 if (handle_ll) {
1027 /* clear old data */
1028 memset(&mdata->rx.pkts, 0, sizeof(mdata->rx.pkts));
1029 memset(&mdata->tx.pkts, 0, sizeof(mdata->tx.pkts));
1030 }
1031 low_latency |= mvm->tcm.result.low_latency[mac];
1032
1033 if (!mvm->tcm.result.low_latency[mac] && handle_uapsd)
1034 iwl_mvm_check_uapsd_agg_expected_tpt(mvm, uapsd_elapsed,
1035 mac);
1036 /* clear old data */
1037 if (handle_uapsd)
1038 mdata->uapsd_nonagg_detect.rx_bytes = 0;
1039 memset(&mdata->rx.airtime, 0, sizeof(mdata->rx.airtime));
1040 memset(&mdata->tx.airtime, 0, sizeof(mdata->tx.airtime));
1041 }
1042
1043 load = iwl_mvm_tcm_load(mvm, total_airtime, elapsed);
1044 mvm->tcm.result.global_load = load;
1045
1046 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1047 band_load = iwl_mvm_tcm_load(mvm, band_airtime[i], elapsed);
1048 mvm->tcm.result.band_load[i] = band_load;
1049 }
1050
1051 /*
1052 * If the current load isn't low we need to force re-evaluation
1053 * in the TCM period, so that we can return to low load if there
1054 * was no traffic at all (and thus iwl_mvm_recalc_tcm didn't get
1055 * triggered by traffic).
1056 */
1057 if (load != IWL_MVM_TRAFFIC_LOW)
1058 return MVM_TCM_PERIOD;
1059 /*
1060 * If low-latency is active we need to force re-evaluation after
1061 * (the longer) MVM_LL_PERIOD, so that we can disable low-latency
1062 * when there's no traffic at all.
1063 */
1064 if (low_latency)
1065 return MVM_LL_PERIOD;
1066 /*
1067 * Otherwise, we don't need to run the work struct because we're
1068 * in the default "idle" state - traffic indication is low (which
1069 * also covers the "no traffic" case) and low-latency is disabled
1070 * so there's no state that may need to be disabled when there's
1071 * no traffic at all.
1072 *
1073 * Note that this has no impact on the regular scheduling of the
1074 * updates triggered by traffic - those happen whenever one of the
1075 * two timeouts expire (if there's traffic at all.)
1076 */
1077 return 0;
1078}
1079
1080void iwl_mvm_recalc_tcm(struct iwl_mvm *mvm)
1081{
1082 unsigned long ts = jiffies;
1083 bool handle_uapsd =
1084 time_after(ts, mvm->tcm.uapsd_nonagg_ts +
1085 msecs_to_jiffies(IWL_MVM_UAPSD_NONAGG_PERIOD));
1086
1087 spin_lock(&mvm->tcm.lock);
1088 if (mvm->tcm.paused || !time_after(ts, mvm->tcm.ts + MVM_TCM_PERIOD)) {
1089 spin_unlock(&mvm->tcm.lock);
1090 return;
1091 }
1092 spin_unlock(&mvm->tcm.lock);
1093
1094 if (handle_uapsd && iwl_mvm_has_new_rx_api(mvm)) {
1095 guard(mvm)(mvm);
1096 if (iwl_mvm_request_statistics(mvm, true))
1097 handle_uapsd = false;
1098 }
1099
1100 spin_lock(&mvm->tcm.lock);
1101 /* re-check if somebody else won the recheck race */
1102 if (!mvm->tcm.paused && time_after(ts, mvm->tcm.ts + MVM_TCM_PERIOD)) {
1103 /* calculate statistics */
1104 unsigned long work_delay = iwl_mvm_calc_tcm_stats(mvm, ts,
1105 handle_uapsd);
1106
1107 /* the memset needs to be visible before the timestamp */
1108 smp_mb();
1109 mvm->tcm.ts = ts;
1110 if (work_delay)
1111 schedule_delayed_work(&mvm->tcm.work, work_delay);
1112 }
1113 spin_unlock(&mvm->tcm.lock);
1114
1115 iwl_mvm_tcm_results(mvm);
1116}
1117
1118void iwl_mvm_tcm_work(struct work_struct *work)
1119{
1120 struct delayed_work *delayed_work = to_delayed_work(work);
1121 struct iwl_mvm *mvm = container_of(delayed_work, struct iwl_mvm,
1122 tcm.work);
1123
1124 iwl_mvm_recalc_tcm(mvm);
1125}
1126
1127void iwl_mvm_pause_tcm(struct iwl_mvm *mvm, bool with_cancel)
1128{
1129 spin_lock_bh(&mvm->tcm.lock);
1130 mvm->tcm.paused = true;
1131 spin_unlock_bh(&mvm->tcm.lock);
1132 if (with_cancel)
1133 cancel_delayed_work_sync(&mvm->tcm.work);
1134}
1135
1136void iwl_mvm_resume_tcm(struct iwl_mvm *mvm)
1137{
1138 int mac;
1139 bool low_latency = false;
1140
1141 spin_lock_bh(&mvm->tcm.lock);
1142 mvm->tcm.ts = jiffies;
1143 mvm->tcm.ll_ts = jiffies;
1144 for (mac = 0; mac < NUM_MAC_INDEX_DRIVER; mac++) {
1145 struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[mac];
1146
1147 memset(&mdata->rx.pkts, 0, sizeof(mdata->rx.pkts));
1148 memset(&mdata->tx.pkts, 0, sizeof(mdata->tx.pkts));
1149 memset(&mdata->rx.airtime, 0, sizeof(mdata->rx.airtime));
1150 memset(&mdata->tx.airtime, 0, sizeof(mdata->tx.airtime));
1151
1152 if (mvm->tcm.result.low_latency[mac])
1153 low_latency = true;
1154 }
1155 /* The TCM data needs to be reset before "paused" flag changes */
1156 smp_mb();
1157 mvm->tcm.paused = false;
1158
1159 /*
1160 * if the current load is not low or low latency is active, force
1161 * re-evaluation to cover the case of no traffic.
1162 */
1163 if (mvm->tcm.result.global_load > IWL_MVM_TRAFFIC_LOW)
1164 schedule_delayed_work(&mvm->tcm.work, MVM_TCM_PERIOD);
1165 else if (low_latency)
1166 schedule_delayed_work(&mvm->tcm.work, MVM_LL_PERIOD);
1167
1168 spin_unlock_bh(&mvm->tcm.lock);
1169}
1170
1171void iwl_mvm_tcm_add_vif(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1172{
1173 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1174
1175 INIT_DELAYED_WORK(&mvmvif->uapsd_nonagg_detected_wk,
1176 iwl_mvm_tcm_uapsd_nonagg_detected_wk);
1177}
1178
1179void iwl_mvm_tcm_rm_vif(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1180{
1181 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1182
1183 cancel_delayed_work_sync(&mvmvif->uapsd_nonagg_detected_wk);
1184}
1185
1186u32 iwl_mvm_get_systime(struct iwl_mvm *mvm)
1187{
1188 u32 reg_addr = DEVICE_SYSTEM_TIME_REG;
1189
1190 if (mvm->trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_22000 &&
1191 mvm->trans->cfg->gp2_reg_addr)
1192 reg_addr = mvm->trans->cfg->gp2_reg_addr;
1193
1194 return iwl_read_prph(mvm->trans, reg_addr);
1195}
1196
1197void iwl_mvm_get_sync_time(struct iwl_mvm *mvm, int clock_type,
1198 u32 *gp2, u64 *boottime, ktime_t *realtime)
1199{
1200 bool ps_disabled;
1201
1202 lockdep_assert_held(&mvm->mutex);
1203
1204 /* Disable power save when reading GP2 */
1205 ps_disabled = mvm->ps_disabled;
1206 if (!ps_disabled) {
1207 mvm->ps_disabled = true;
1208 iwl_mvm_power_update_device(mvm);
1209 }
1210
1211 *gp2 = iwl_mvm_get_systime(mvm);
1212
1213 if (clock_type == CLOCK_BOOTTIME && boottime)
1214 *boottime = ktime_get_boottime_ns();
1215 else if (clock_type == CLOCK_REALTIME && realtime)
1216 *realtime = ktime_get_real();
1217
1218 if (!ps_disabled) {
1219 mvm->ps_disabled = ps_disabled;
1220 iwl_mvm_power_update_device(mvm);
1221 }
1222}
1223
1224/* Find if at least two links from different vifs use same channel
1225 * FIXME: consider having a refcount array in struct iwl_mvm_vif for
1226 * used phy_ctxt ids.
1227 */
1228bool iwl_mvm_have_links_same_channel(struct iwl_mvm_vif *vif1,
1229 struct iwl_mvm_vif *vif2)
1230{
1231 unsigned int i, j;
1232
1233 for_each_mvm_vif_valid_link(vif1, i) {
1234 for_each_mvm_vif_valid_link(vif2, j) {
1235 if (vif1->link[i]->phy_ctxt == vif2->link[j]->phy_ctxt)
1236 return true;
1237 }
1238 }
1239
1240 return false;
1241}
1242
1243bool iwl_mvm_vif_is_active(struct iwl_mvm_vif *mvmvif)
1244{
1245 unsigned int i;
1246
1247 /* FIXME: can it fail when phy_ctxt is assigned? */
1248 for_each_mvm_vif_valid_link(mvmvif, i) {
1249 if (mvmvif->link[i]->phy_ctxt &&
1250 mvmvif->link[i]->phy_ctxt->id < NUM_PHY_CTX)
1251 return true;
1252 }
1253
1254 return false;
1255}
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}