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[mirror_ubuntu-jammy-kernel.git] / drivers / net / wireless / rtlwifi / ps.c
1 /******************************************************************************
2 *
3 * Copyright(c) 2009-2012 Realtek Corporation.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of version 2 of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
17 *
18 * The full GNU General Public License is included in this distribution in the
19 * file called LICENSE.
20 *
21 * Contact Information:
22 * wlanfae <wlanfae@realtek.com>
23 * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
24 * Hsinchu 300, Taiwan.
25 *
26 * Larry Finger <Larry.Finger@lwfinger.net>
27 *
28 *****************************************************************************/
29
30 #include <linux/export.h>
31 #include "wifi.h"
32 #include "base.h"
33 #include "ps.h"
34
35 bool rtl_ps_enable_nic(struct ieee80211_hw *hw)
36 {
37 struct rtl_priv *rtlpriv = rtl_priv(hw);
38 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
39 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
40
41 /*<1> reset trx ring */
42 if (rtlhal->interface == INTF_PCI)
43 rtlpriv->intf_ops->reset_trx_ring(hw);
44
45 if (is_hal_stop(rtlhal))
46 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
47 "Driver is already down!\n");
48
49 /*<2> Enable Adapter */
50 if (rtlpriv->cfg->ops->hw_init(hw))
51 return 1;
52 RT_CLEAR_PS_LEVEL(ppsc, RT_RF_OFF_LEVL_HALT_NIC);
53
54 /*<3> Enable Interrupt */
55 rtlpriv->cfg->ops->enable_interrupt(hw);
56
57 /*<enable timer> */
58 rtl_watch_dog_timer_callback((unsigned long)hw);
59
60 return true;
61 }
62 EXPORT_SYMBOL(rtl_ps_enable_nic);
63
64 bool rtl_ps_disable_nic(struct ieee80211_hw *hw)
65 {
66 struct rtl_priv *rtlpriv = rtl_priv(hw);
67
68 /*<1> Stop all timer */
69 rtl_deinit_deferred_work(hw);
70
71 /*<2> Disable Interrupt */
72 rtlpriv->cfg->ops->disable_interrupt(hw);
73 tasklet_kill(&rtlpriv->works.irq_tasklet);
74
75 /*<3> Disable Adapter */
76 rtlpriv->cfg->ops->hw_disable(hw);
77
78 return true;
79 }
80 EXPORT_SYMBOL(rtl_ps_disable_nic);
81
82 bool rtl_ps_set_rf_state(struct ieee80211_hw *hw,
83 enum rf_pwrstate state_toset,
84 u32 changesource)
85 {
86 struct rtl_priv *rtlpriv = rtl_priv(hw);
87 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
88 bool actionallowed = false;
89
90 switch (state_toset) {
91 case ERFON:
92 ppsc->rfoff_reason &= (~changesource);
93
94 if ((changesource == RF_CHANGE_BY_HW) &&
95 (ppsc->hwradiooff)) {
96 ppsc->hwradiooff = false;
97 }
98
99 if (!ppsc->rfoff_reason) {
100 ppsc->rfoff_reason = 0;
101 actionallowed = true;
102 }
103
104 break;
105
106 case ERFOFF:
107
108 if ((changesource == RF_CHANGE_BY_HW) && !ppsc->hwradiooff) {
109 ppsc->hwradiooff = true;
110 }
111
112 ppsc->rfoff_reason |= changesource;
113 actionallowed = true;
114 break;
115
116 case ERFSLEEP:
117 ppsc->rfoff_reason |= changesource;
118 actionallowed = true;
119 break;
120
121 default:
122 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
123 "switch case not processed\n");
124 break;
125 }
126
127 if (actionallowed)
128 rtlpriv->cfg->ops->set_rf_power_state(hw, state_toset);
129
130 return actionallowed;
131 }
132 EXPORT_SYMBOL(rtl_ps_set_rf_state);
133
134 static void _rtl_ps_inactive_ps(struct ieee80211_hw *hw)
135 {
136 struct rtl_priv *rtlpriv = rtl_priv(hw);
137 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
138 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
139
140 ppsc->swrf_processing = true;
141
142 if (ppsc->inactive_pwrstate == ERFON &&
143 rtlhal->interface == INTF_PCI) {
144 if ((ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM) &&
145 RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM) &&
146 rtlhal->interface == INTF_PCI) {
147 rtlpriv->intf_ops->disable_aspm(hw);
148 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
149 }
150 }
151
152 rtl_ps_set_rf_state(hw, ppsc->inactive_pwrstate, RF_CHANGE_BY_IPS);
153
154 if (ppsc->inactive_pwrstate == ERFOFF &&
155 rtlhal->interface == INTF_PCI) {
156 if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM &&
157 !RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
158 rtlpriv->intf_ops->enable_aspm(hw);
159 RT_SET_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
160 }
161 }
162
163 ppsc->swrf_processing = false;
164 }
165
166 void rtl_ips_nic_off_wq_callback(void *data)
167 {
168 struct rtl_works *rtlworks =
169 container_of_dwork_rtl(data, struct rtl_works, ips_nic_off_wq);
170 struct ieee80211_hw *hw = rtlworks->hw;
171 struct rtl_priv *rtlpriv = rtl_priv(hw);
172 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
173 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
174 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
175 enum rf_pwrstate rtstate;
176
177 if (mac->opmode != NL80211_IFTYPE_STATION) {
178 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
179 "not station return\n");
180 return;
181 }
182
183 if (mac->p2p_in_use)
184 return;
185
186 if (mac->link_state > MAC80211_NOLINK)
187 return;
188
189 if (is_hal_stop(rtlhal))
190 return;
191
192 if (rtlpriv->sec.being_setkey)
193 return;
194
195 if (rtlpriv->cfg->ops->bt_coex_off_before_lps)
196 rtlpriv->cfg->ops->bt_coex_off_before_lps(hw);
197
198 if (ppsc->inactiveps) {
199 rtstate = ppsc->rfpwr_state;
200
201 /*
202 *Do not enter IPS in the following conditions:
203 *(1) RF is already OFF or Sleep
204 *(2) swrf_processing (indicates the IPS is still under going)
205 *(3) Connectted (only disconnected can trigger IPS)
206 *(4) IBSS (send Beacon)
207 *(5) AP mode (send Beacon)
208 *(6) monitor mode (rcv packet)
209 */
210
211 if (rtstate == ERFON &&
212 !ppsc->swrf_processing &&
213 (mac->link_state == MAC80211_NOLINK) &&
214 !mac->act_scanning) {
215 RT_TRACE(rtlpriv, COMP_RF, DBG_TRACE,
216 "IPSEnter(): Turn off RF\n");
217
218 ppsc->inactive_pwrstate = ERFOFF;
219 ppsc->in_powersavemode = true;
220
221 /*rtl_pci_reset_trx_ring(hw); */
222 _rtl_ps_inactive_ps(hw);
223 }
224 }
225 }
226
227 void rtl_ips_nic_off(struct ieee80211_hw *hw)
228 {
229 struct rtl_priv *rtlpriv = rtl_priv(hw);
230
231 /*
232 *because when link with ap, mac80211 will ask us
233 *to disable nic quickly after scan before linking,
234 *this will cause link failed, so we delay 100ms here
235 */
236 queue_delayed_work(rtlpriv->works.rtl_wq,
237 &rtlpriv->works.ips_nic_off_wq, MSECS(100));
238 }
239
240 /* NOTICE: any opmode should exc nic_on, or disable without
241 * nic_on may something wrong, like adhoc TP
242 */
243 void rtl_ips_nic_on(struct ieee80211_hw *hw)
244 {
245 struct rtl_priv *rtlpriv = rtl_priv(hw);
246 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
247 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
248 enum rf_pwrstate rtstate;
249 unsigned long flags;
250
251 if (mac->opmode != NL80211_IFTYPE_STATION)
252 return;
253
254 spin_lock_irqsave(&rtlpriv->locks.ips_lock, flags);
255
256 if (ppsc->inactiveps) {
257 rtstate = ppsc->rfpwr_state;
258
259 if (rtstate != ERFON &&
260 !ppsc->swrf_processing &&
261 ppsc->rfoff_reason <= RF_CHANGE_BY_IPS) {
262
263 ppsc->inactive_pwrstate = ERFON;
264 ppsc->in_powersavemode = false;
265
266 _rtl_ps_inactive_ps(hw);
267 }
268 }
269
270 spin_unlock_irqrestore(&rtlpriv->locks.ips_lock, flags);
271 }
272 EXPORT_SYMBOL_GPL(rtl_ips_nic_on);
273
274 /*for FW LPS*/
275
276 /*
277 *Determine if we can set Fw into PS mode
278 *in current condition.Return TRUE if it
279 *can enter PS mode.
280 */
281 static bool rtl_get_fwlps_doze(struct ieee80211_hw *hw)
282 {
283 struct rtl_priv *rtlpriv = rtl_priv(hw);
284 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
285 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
286 u32 ps_timediff;
287
288 ps_timediff = jiffies_to_msecs(jiffies -
289 ppsc->last_delaylps_stamp_jiffies);
290
291 if (ps_timediff < 2000) {
292 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
293 "Delay enter Fw LPS for DHCP, ARP, or EAPOL exchanging state\n");
294 return false;
295 }
296
297 if (mac->link_state != MAC80211_LINKED)
298 return false;
299
300 if (mac->opmode == NL80211_IFTYPE_ADHOC)
301 return false;
302
303 return true;
304 }
305
306 /* Change current and default preamble mode.*/
307 static void rtl_lps_set_psmode(struct ieee80211_hw *hw, u8 rt_psmode)
308 {
309 struct rtl_priv *rtlpriv = rtl_priv(hw);
310 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
311 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
312 bool enter_fwlps;
313
314 if (mac->opmode == NL80211_IFTYPE_ADHOC)
315 return;
316
317 if (mac->link_state != MAC80211_LINKED)
318 return;
319
320 if (ppsc->dot11_psmode == rt_psmode)
321 return;
322
323 /* Update power save mode configured. */
324 ppsc->dot11_psmode = rt_psmode;
325
326 /*
327 *<FW control LPS>
328 *1. Enter PS mode
329 * Set RPWM to Fw to turn RF off and send H2C fw_pwrmode
330 * cmd to set Fw into PS mode.
331 *2. Leave PS mode
332 * Send H2C fw_pwrmode cmd to Fw to set Fw into Active
333 * mode and set RPWM to turn RF on.
334 */
335
336 if ((ppsc->fwctrl_lps) && ppsc->report_linked) {
337 if (ppsc->dot11_psmode == EACTIVE) {
338 RT_TRACE(rtlpriv, COMP_RF, DBG_DMESG,
339 "FW LPS leave ps_mode:%x\n",
340 FW_PS_ACTIVE_MODE);
341 enter_fwlps = false;
342 ppsc->pwr_mode = FW_PS_ACTIVE_MODE;
343 ppsc->smart_ps = 0;
344 rtlpriv->cfg->ops->set_hw_reg(hw,
345 HW_VAR_FW_LPS_ACTION,
346 (u8 *)(&enter_fwlps));
347 if (ppsc->p2p_ps_info.opp_ps)
348 rtl_p2p_ps_cmd(hw, P2P_PS_ENABLE);
349
350 } else {
351 if (rtl_get_fwlps_doze(hw)) {
352 RT_TRACE(rtlpriv, COMP_RF, DBG_DMESG,
353 "FW LPS enter ps_mode:%x\n",
354 ppsc->fwctrl_psmode);
355 enter_fwlps = true;
356 ppsc->pwr_mode = ppsc->fwctrl_psmode;
357 ppsc->smart_ps = 2;
358 rtlpriv->cfg->ops->set_hw_reg(hw,
359 HW_VAR_FW_LPS_ACTION,
360 (u8 *)(&enter_fwlps));
361
362 } else {
363 /* Reset the power save related parameters. */
364 ppsc->dot11_psmode = EACTIVE;
365 }
366 }
367 }
368 }
369
370 /*Enter the leisure power save mode.*/
371 void rtl_lps_enter(struct ieee80211_hw *hw)
372 {
373 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
374 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
375 struct rtl_priv *rtlpriv = rtl_priv(hw);
376
377 if (!ppsc->fwctrl_lps)
378 return;
379
380 if (rtlpriv->sec.being_setkey)
381 return;
382
383 if (rtlpriv->link_info.busytraffic)
384 return;
385
386 /*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */
387 if (mac->cnt_after_linked < 5)
388 return;
389
390 if (mac->opmode == NL80211_IFTYPE_ADHOC)
391 return;
392
393 if (mac->link_state != MAC80211_LINKED)
394 return;
395
396 mutex_lock(&rtlpriv->locks.ps_mutex);
397
398 /* Idle for a while if we connect to AP a while ago. */
399 if (mac->cnt_after_linked >= 2) {
400 if (ppsc->dot11_psmode == EACTIVE) {
401 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
402 "Enter 802.11 power save mode...\n");
403
404 rtl_lps_set_psmode(hw, EAUTOPS);
405 }
406 }
407
408 mutex_unlock(&rtlpriv->locks.ps_mutex);
409 }
410
411 /*Leave the leisure power save mode.*/
412 void rtl_lps_leave(struct ieee80211_hw *hw)
413 {
414 struct rtl_priv *rtlpriv = rtl_priv(hw);
415 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
416 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
417
418 mutex_lock(&rtlpriv->locks.ps_mutex);
419
420 if (ppsc->fwctrl_lps) {
421 if (ppsc->dot11_psmode != EACTIVE) {
422
423 /*FIX ME */
424 rtlpriv->cfg->ops->enable_interrupt(hw);
425
426 if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM &&
427 RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM) &&
428 rtlhal->interface == INTF_PCI) {
429 rtlpriv->intf_ops->disable_aspm(hw);
430 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
431 }
432
433 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
434 "Busy Traffic,Leave 802.11 power save..\n");
435
436 rtl_lps_set_psmode(hw, EACTIVE);
437 }
438 }
439 mutex_unlock(&rtlpriv->locks.ps_mutex);
440 }
441
442 /* For sw LPS*/
443 void rtl_swlps_beacon(struct ieee80211_hw *hw, void *data, unsigned int len)
444 {
445 struct rtl_priv *rtlpriv = rtl_priv(hw);
446 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
447 struct ieee80211_hdr *hdr = data;
448 struct ieee80211_tim_ie *tim_ie;
449 u8 *tim;
450 u8 tim_len;
451 bool u_buffed;
452 bool m_buffed;
453
454 if (mac->opmode != NL80211_IFTYPE_STATION)
455 return;
456
457 if (!rtlpriv->psc.swctrl_lps)
458 return;
459
460 if (rtlpriv->mac80211.link_state != MAC80211_LINKED)
461 return;
462
463 if (!rtlpriv->psc.sw_ps_enabled)
464 return;
465
466 if (rtlpriv->psc.fwctrl_lps)
467 return;
468
469 if (likely(!(hw->conf.flags & IEEE80211_CONF_PS)))
470 return;
471
472 /* check if this really is a beacon */
473 if (!ieee80211_is_beacon(hdr->frame_control))
474 return;
475
476 /* min. beacon length + FCS_LEN */
477 if (len <= 40 + FCS_LEN)
478 return;
479
480 /* and only beacons from the associated BSSID, please */
481 if (!ether_addr_equal_64bits(hdr->addr3, rtlpriv->mac80211.bssid))
482 return;
483
484 rtlpriv->psc.last_beacon = jiffies;
485
486 tim = rtl_find_ie(data, len - FCS_LEN, WLAN_EID_TIM);
487 if (!tim)
488 return;
489
490 if (tim[1] < sizeof(*tim_ie))
491 return;
492
493 tim_len = tim[1];
494 tim_ie = (struct ieee80211_tim_ie *) &tim[2];
495
496 if (!WARN_ON_ONCE(!hw->conf.ps_dtim_period))
497 rtlpriv->psc.dtim_counter = tim_ie->dtim_count;
498
499 /* Check whenever the PHY can be turned off again. */
500
501 /* 1. What about buffered unicast traffic for our AID? */
502 u_buffed = ieee80211_check_tim(tim_ie, tim_len,
503 rtlpriv->mac80211.assoc_id);
504
505 /* 2. Maybe the AP wants to send multicast/broadcast data? */
506 m_buffed = tim_ie->bitmap_ctrl & 0x01;
507 rtlpriv->psc.multi_buffered = m_buffed;
508
509 /* unicast will process by mac80211 through
510 * set ~IEEE80211_CONF_PS, So we just check
511 * multicast frames here */
512 if (!m_buffed) {
513 /* back to low-power land. and delay is
514 * prevent null power save frame tx fail */
515 queue_delayed_work(rtlpriv->works.rtl_wq,
516 &rtlpriv->works.ps_work, MSECS(5));
517 } else {
518 RT_TRACE(rtlpriv, COMP_POWER, DBG_DMESG,
519 "u_bufferd: %x, m_buffered: %x\n", u_buffed, m_buffed);
520 }
521 }
522 EXPORT_SYMBOL_GPL(rtl_swlps_beacon);
523
524 void rtl_swlps_rf_awake(struct ieee80211_hw *hw)
525 {
526 struct rtl_priv *rtlpriv = rtl_priv(hw);
527 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
528 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
529
530 if (!rtlpriv->psc.swctrl_lps)
531 return;
532 if (mac->link_state != MAC80211_LINKED)
533 return;
534
535 if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM &&
536 RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
537 rtlpriv->intf_ops->disable_aspm(hw);
538 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
539 }
540
541 mutex_lock(&rtlpriv->locks.ps_mutex);
542 rtl_ps_set_rf_state(hw, ERFON, RF_CHANGE_BY_PS);
543 mutex_unlock(&rtlpriv->locks.ps_mutex);
544 }
545
546 void rtl_swlps_rfon_wq_callback(void *data)
547 {
548 struct rtl_works *rtlworks =
549 container_of_dwork_rtl(data, struct rtl_works, ps_rfon_wq);
550 struct ieee80211_hw *hw = rtlworks->hw;
551
552 rtl_swlps_rf_awake(hw);
553 }
554
555 void rtl_swlps_rf_sleep(struct ieee80211_hw *hw)
556 {
557 struct rtl_priv *rtlpriv = rtl_priv(hw);
558 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
559 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
560 u8 sleep_intv;
561
562 if (!rtlpriv->psc.sw_ps_enabled)
563 return;
564
565 if ((rtlpriv->sec.being_setkey) ||
566 (mac->opmode == NL80211_IFTYPE_ADHOC))
567 return;
568
569 /*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */
570 if ((mac->link_state != MAC80211_LINKED) || (mac->cnt_after_linked < 5))
571 return;
572
573 if (rtlpriv->link_info.busytraffic)
574 return;
575
576 mutex_lock(&rtlpriv->locks.ps_mutex);
577 rtl_ps_set_rf_state(hw, ERFSLEEP, RF_CHANGE_BY_PS);
578 mutex_unlock(&rtlpriv->locks.ps_mutex);
579
580 if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM &&
581 !RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
582 rtlpriv->intf_ops->enable_aspm(hw);
583 RT_SET_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
584 }
585
586 /* here is power save alg, when this beacon is DTIM
587 * we will set sleep time to dtim_period * n;
588 * when this beacon is not DTIM, we will set sleep
589 * time to sleep_intv = rtlpriv->psc.dtim_counter or
590 * MAX_SW_LPS_SLEEP_INTV(default set to 5) */
591
592 if (rtlpriv->psc.dtim_counter == 0) {
593 if (hw->conf.ps_dtim_period == 1)
594 sleep_intv = hw->conf.ps_dtim_period * 2;
595 else
596 sleep_intv = hw->conf.ps_dtim_period;
597 } else {
598 sleep_intv = rtlpriv->psc.dtim_counter;
599 }
600
601 if (sleep_intv > MAX_SW_LPS_SLEEP_INTV)
602 sleep_intv = MAX_SW_LPS_SLEEP_INTV;
603
604 /* this print should always be dtim_conter = 0 &
605 * sleep = dtim_period, that meaons, we should
606 * awake before every dtim */
607 RT_TRACE(rtlpriv, COMP_POWER, DBG_DMESG,
608 "dtim_counter:%x will sleep :%d beacon_intv\n",
609 rtlpriv->psc.dtim_counter, sleep_intv);
610
611 /* we tested that 40ms is enough for sw & hw sw delay */
612 queue_delayed_work(rtlpriv->works.rtl_wq, &rtlpriv->works.ps_rfon_wq,
613 MSECS(sleep_intv * mac->vif->bss_conf.beacon_int - 40));
614 }
615
616 void rtl_lps_change_work_callback(struct work_struct *work)
617 {
618 struct rtl_works *rtlworks =
619 container_of(work, struct rtl_works, lps_change_work);
620 struct ieee80211_hw *hw = rtlworks->hw;
621 struct rtl_priv *rtlpriv = rtl_priv(hw);
622
623 if (rtlpriv->enter_ps)
624 rtl_lps_enter(hw);
625 else
626 rtl_lps_leave(hw);
627 }
628 EXPORT_SYMBOL_GPL(rtl_lps_change_work_callback);
629
630 void rtl_swlps_wq_callback(void *data)
631 {
632 struct rtl_works *rtlworks = container_of_dwork_rtl(data,
633 struct rtl_works,
634 ps_work);
635 struct ieee80211_hw *hw = rtlworks->hw;
636 struct rtl_priv *rtlpriv = rtl_priv(hw);
637 bool ps = false;
638
639 ps = (hw->conf.flags & IEEE80211_CONF_PS);
640
641 /* we can sleep after ps null send ok */
642 if (rtlpriv->psc.state_inap) {
643 rtl_swlps_rf_sleep(hw);
644
645 if (rtlpriv->psc.state && !ps) {
646 rtlpriv->psc.sleep_ms = jiffies_to_msecs(jiffies -
647 rtlpriv->psc.last_action);
648 }
649
650 if (ps)
651 rtlpriv->psc.last_slept = jiffies;
652
653 rtlpriv->psc.last_action = jiffies;
654 rtlpriv->psc.state = ps;
655 }
656 }
657
658 static void rtl_p2p_noa_ie(struct ieee80211_hw *hw, void *data,
659 unsigned int len)
660 {
661 struct rtl_priv *rtlpriv = rtl_priv(hw);
662 struct ieee80211_mgmt *mgmt = (void *)data;
663 struct rtl_p2p_ps_info *p2pinfo = &(rtlpriv->psc.p2p_ps_info);
664 u8 *pos, *end, *ie;
665 u16 noa_len;
666 static u8 p2p_oui_ie_type[4] = {0x50, 0x6f, 0x9a, 0x09};
667 u8 noa_num, index, i, noa_index = 0;
668 bool find_p2p_ie = false , find_p2p_ps_ie = false;
669 pos = (u8 *)mgmt->u.beacon.variable;
670 end = data + len;
671 ie = NULL;
672
673 while (pos + 1 < end) {
674 if (pos + 2 + pos[1] > end)
675 return;
676
677 if (pos[0] == 221 && pos[1] > 4) {
678 if (memcmp(&pos[2], p2p_oui_ie_type, 4) == 0) {
679 ie = pos + 2+4;
680 break;
681 }
682 }
683 pos += 2 + pos[1];
684 }
685
686 if (ie == NULL)
687 return;
688 find_p2p_ie = true;
689 /*to find noa ie*/
690 while (ie + 1 < end) {
691 noa_len = READEF2BYTE((__le16 *)&ie[1]);
692 if (ie + 3 + ie[1] > end)
693 return;
694
695 if (ie[0] == 12) {
696 find_p2p_ps_ie = true;
697 if ((noa_len - 2) % 13 != 0) {
698 RT_TRACE(rtlpriv, COMP_INIT, DBG_LOUD,
699 "P2P notice of absence: invalid length.%d\n",
700 noa_len);
701 return;
702 } else {
703 noa_num = (noa_len - 2) / 13;
704 }
705 noa_index = ie[3];
706 if (rtlpriv->psc.p2p_ps_info.p2p_ps_mode ==
707 P2P_PS_NONE || noa_index != p2pinfo->noa_index) {
708 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD,
709 "update NOA ie.\n");
710 p2pinfo->noa_index = noa_index;
711 p2pinfo->opp_ps = (ie[4] >> 7);
712 p2pinfo->ctwindow = ie[4] & 0x7F;
713 p2pinfo->noa_num = noa_num;
714 index = 5;
715 for (i = 0; i < noa_num; i++) {
716 p2pinfo->noa_count_type[i] =
717 READEF1BYTE(ie+index);
718 index += 1;
719 p2pinfo->noa_duration[i] =
720 READEF4BYTE((__le32 *)ie+index);
721 index += 4;
722 p2pinfo->noa_interval[i] =
723 READEF4BYTE((__le32 *)ie+index);
724 index += 4;
725 p2pinfo->noa_start_time[i] =
726 READEF4BYTE((__le32 *)ie+index);
727 index += 4;
728 }
729
730 if (p2pinfo->opp_ps == 1) {
731 p2pinfo->p2p_ps_mode = P2P_PS_CTWINDOW;
732 /* Driver should wait LPS entering
733 * CTWindow
734 */
735 if (rtlpriv->psc.fw_current_inpsmode)
736 rtl_p2p_ps_cmd(hw,
737 P2P_PS_ENABLE);
738 } else if (p2pinfo->noa_num > 0) {
739 p2pinfo->p2p_ps_mode = P2P_PS_NOA;
740 rtl_p2p_ps_cmd(hw, P2P_PS_ENABLE);
741 } else if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
742 rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE);
743 }
744 }
745 break;
746 }
747 ie += 3 + noa_len;
748 }
749
750 if (find_p2p_ie == true) {
751 if ((p2pinfo->p2p_ps_mode > P2P_PS_NONE) &&
752 (find_p2p_ps_ie == false))
753 rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE);
754 }
755 }
756
757 static void rtl_p2p_action_ie(struct ieee80211_hw *hw, void *data,
758 unsigned int len)
759 {
760 struct rtl_priv *rtlpriv = rtl_priv(hw);
761 struct ieee80211_mgmt *mgmt = (void *)data;
762 struct rtl_p2p_ps_info *p2pinfo = &(rtlpriv->psc.p2p_ps_info);
763 u8 noa_num, index, i, noa_index = 0;
764 u8 *pos, *end, *ie;
765 u16 noa_len;
766 static u8 p2p_oui_ie_type[4] = {0x50, 0x6f, 0x9a, 0x09};
767
768 pos = (u8 *)&mgmt->u.action.category;
769 end = data + len;
770 ie = NULL;
771
772 if (pos[0] == 0x7f) {
773 if (memcmp(&pos[1], p2p_oui_ie_type, 4) == 0)
774 ie = pos + 3+4;
775 }
776
777 if (ie == NULL)
778 return;
779
780 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, "action frame find P2P IE.\n");
781 /*to find noa ie*/
782 while (ie + 1 < end) {
783 noa_len = READEF2BYTE((__le16 *)&ie[1]);
784 if (ie + 3 + ie[1] > end)
785 return;
786
787 if (ie[0] == 12) {
788 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, "find NOA IE.\n");
789 RT_PRINT_DATA(rtlpriv, COMP_FW, DBG_LOUD, "noa ie ",
790 ie, noa_len);
791 if ((noa_len - 2) % 13 != 0) {
792 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD,
793 "P2P notice of absence: invalid length.%d\n",
794 noa_len);
795 return;
796 } else {
797 noa_num = (noa_len - 2) / 13;
798 }
799 noa_index = ie[3];
800 if (rtlpriv->psc.p2p_ps_info.p2p_ps_mode ==
801 P2P_PS_NONE || noa_index != p2pinfo->noa_index) {
802 p2pinfo->noa_index = noa_index;
803 p2pinfo->opp_ps = (ie[4] >> 7);
804 p2pinfo->ctwindow = ie[4] & 0x7F;
805 p2pinfo->noa_num = noa_num;
806 index = 5;
807 for (i = 0; i < noa_num; i++) {
808 p2pinfo->noa_count_type[i] =
809 READEF1BYTE(ie+index);
810 index += 1;
811 p2pinfo->noa_duration[i] =
812 READEF4BYTE((__le32 *)ie+index);
813 index += 4;
814 p2pinfo->noa_interval[i] =
815 READEF4BYTE((__le32 *)ie+index);
816 index += 4;
817 p2pinfo->noa_start_time[i] =
818 READEF4BYTE((__le32 *)ie+index);
819 index += 4;
820 }
821
822 if (p2pinfo->opp_ps == 1) {
823 p2pinfo->p2p_ps_mode = P2P_PS_CTWINDOW;
824 /* Driver should wait LPS entering
825 * CTWindow
826 */
827 if (rtlpriv->psc.fw_current_inpsmode)
828 rtl_p2p_ps_cmd(hw,
829 P2P_PS_ENABLE);
830 } else if (p2pinfo->noa_num > 0) {
831 p2pinfo->p2p_ps_mode = P2P_PS_NOA;
832 rtl_p2p_ps_cmd(hw, P2P_PS_ENABLE);
833 } else if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
834 rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE);
835 }
836 }
837 break;
838 }
839 ie += 3 + noa_len;
840 }
841 }
842
843 void rtl_p2p_ps_cmd(struct ieee80211_hw *hw, u8 p2p_ps_state)
844 {
845 struct rtl_priv *rtlpriv = rtl_priv(hw);
846 struct rtl_ps_ctl *rtlps = rtl_psc(rtl_priv(hw));
847 struct rtl_p2p_ps_info *p2pinfo = &(rtlpriv->psc.p2p_ps_info);
848
849 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, " p2p state %x\n", p2p_ps_state);
850 switch (p2p_ps_state) {
851 case P2P_PS_DISABLE:
852 p2pinfo->p2p_ps_state = p2p_ps_state;
853 rtlpriv->cfg->ops->set_hw_reg(hw,
854 HW_VAR_H2C_FW_P2P_PS_OFFLOAD,
855 (u8 *)(&p2p_ps_state));
856
857 p2pinfo->noa_index = 0;
858 p2pinfo->ctwindow = 0;
859 p2pinfo->opp_ps = 0;
860 p2pinfo->noa_num = 0;
861 p2pinfo->p2p_ps_mode = P2P_PS_NONE;
862 if (rtlps->fw_current_inpsmode == true) {
863 if (rtlps->smart_ps == 0) {
864 rtlps->smart_ps = 2;
865 rtlpriv->cfg->ops->set_hw_reg(hw,
866 HW_VAR_H2C_FW_PWRMODE,
867 (u8 *)(&rtlps->pwr_mode));
868 }
869 }
870 break;
871 case P2P_PS_ENABLE:
872 if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
873 p2pinfo->p2p_ps_state = p2p_ps_state;
874
875 if (p2pinfo->ctwindow > 0) {
876 if (rtlps->smart_ps != 0) {
877 rtlps->smart_ps = 0;
878 rtlpriv->cfg->ops->set_hw_reg(hw,
879 HW_VAR_H2C_FW_PWRMODE,
880 (u8 *)(&rtlps->pwr_mode));
881 }
882 }
883 rtlpriv->cfg->ops->set_hw_reg(hw,
884 HW_VAR_H2C_FW_P2P_PS_OFFLOAD,
885 (u8 *)(&p2p_ps_state));
886 }
887 break;
888 case P2P_PS_SCAN:
889 case P2P_PS_SCAN_DONE:
890 case P2P_PS_ALLSTASLEEP:
891 if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
892 p2pinfo->p2p_ps_state = p2p_ps_state;
893 rtlpriv->cfg->ops->set_hw_reg(hw,
894 HW_VAR_H2C_FW_P2P_PS_OFFLOAD,
895 (u8 *)(&p2p_ps_state));
896 }
897 break;
898 default:
899 break;
900 }
901 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD,
902 "ctwindow %x oppps %x\n", p2pinfo->ctwindow, p2pinfo->opp_ps);
903 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD,
904 "count %x duration %x index %x interval %x start time %x noa num %x\n",
905 p2pinfo->noa_count_type[0], p2pinfo->noa_duration[0],
906 p2pinfo->noa_index, p2pinfo->noa_interval[0],
907 p2pinfo->noa_start_time[0], p2pinfo->noa_num);
908 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, "end\n");
909 }
910
911 void rtl_p2p_info(struct ieee80211_hw *hw, void *data, unsigned int len)
912 {
913 struct rtl_priv *rtlpriv = rtl_priv(hw);
914 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
915 struct ieee80211_hdr *hdr = (void *)data;
916
917 if (!mac->p2p)
918 return;
919 if (mac->link_state != MAC80211_LINKED)
920 return;
921 /* min. beacon length + FCS_LEN */
922 if (len <= 40 + FCS_LEN)
923 return;
924
925 /* and only beacons from the associated BSSID, please */
926 if (!ether_addr_equal_64bits(hdr->addr3, rtlpriv->mac80211.bssid))
927 return;
928
929 /* check if this really is a beacon */
930 if (!(ieee80211_is_beacon(hdr->frame_control) ||
931 ieee80211_is_probe_resp(hdr->frame_control) ||
932 ieee80211_is_action(hdr->frame_control)))
933 return;
934
935 if (ieee80211_is_action(hdr->frame_control))
936 rtl_p2p_action_ie(hw, data, len - FCS_LEN);
937 else
938 rtl_p2p_noa_ie(hw, data, len - FCS_LEN);
939 }
940 EXPORT_SYMBOL_GPL(rtl_p2p_info);
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