1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright(c) 2009-2012 Realtek Corporation.*/
3
4 #include "wifi.h"
5 #include "base.h"
6 #include "ps.h"
7 #include <linux/export.h>
8 #include "btcoexist/rtl_btc.h"
9
rtl_ps_enable_nic(struct ieee80211_hw * hw)10 bool rtl_ps_enable_nic(struct ieee80211_hw *hw)
11 {
12 struct rtl_priv *rtlpriv = rtl_priv(hw);
13 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
14 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
15 struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
16
17 /*<1> reset trx ring */
18 if (rtlhal->interface == INTF_PCI)
19 rtlpriv->intf_ops->reset_trx_ring(hw);
20
21 if (is_hal_stop(rtlhal))
22 rtl_dbg(rtlpriv, COMP_ERR, DBG_WARNING,
23 "Driver is already down!\n");
24
25 /*<2> Enable Adapter */
26 if (rtlpriv->cfg->ops->hw_init(hw))
27 return false;
28 rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_RETRY_LIMIT,
29 &rtlmac->retry_long);
30 RT_CLEAR_PS_LEVEL(ppsc, RT_RF_OFF_LEVL_HALT_NIC);
31
32 rtlpriv->cfg->ops->switch_channel(hw);
33 rtlpriv->cfg->ops->set_channel_access(hw);
34 rtlpriv->cfg->ops->set_bw_mode(hw,
35 cfg80211_get_chandef_type(&hw->conf.chandef));
36
37 /*<3> Enable Interrupt */
38 rtlpriv->cfg->ops->enable_interrupt(hw);
39
40 /*<enable timer> */
41 rtl_watch_dog_timer_callback(&rtlpriv->works.watchdog_timer);
42
43 return true;
44 }
45 EXPORT_SYMBOL(rtl_ps_enable_nic);
46
rtl_ps_disable_nic(struct ieee80211_hw * hw)47 bool rtl_ps_disable_nic(struct ieee80211_hw *hw)
48 {
49 struct rtl_priv *rtlpriv = rtl_priv(hw);
50
51 /*<1> Stop all timer */
52 rtl_deinit_deferred_work(hw, true);
53
54 /*<2> Disable Interrupt */
55 rtlpriv->cfg->ops->disable_interrupt(hw);
56 tasklet_kill(&rtlpriv->works.irq_tasklet);
57
58 /*<3> Disable Adapter */
59 rtlpriv->cfg->ops->hw_disable(hw);
60
61 return true;
62 }
63 EXPORT_SYMBOL(rtl_ps_disable_nic);
64
rtl_ps_set_rf_state(struct ieee80211_hw * hw,enum rf_pwrstate state_toset,u32 changesource)65 static bool rtl_ps_set_rf_state(struct ieee80211_hw *hw,
66 enum rf_pwrstate state_toset,
67 u32 changesource)
68 {
69 struct rtl_priv *rtlpriv = rtl_priv(hw);
70 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
71 bool actionallowed = false;
72 u16 rfwait_cnt = 0;
73
74 /*Only one thread can change
75 *the RF state at one time, and others
76 *should wait to be executed.
77 */
78 while (true) {
79 spin_lock(&rtlpriv->locks.rf_ps_lock);
80 if (ppsc->rfchange_inprogress) {
81 spin_unlock(&rtlpriv->locks.rf_ps_lock);
82
83 rtl_dbg(rtlpriv, COMP_ERR, DBG_WARNING,
84 "RF Change in progress! Wait to set..state_toset(%d).\n",
85 state_toset);
86
87 /* Set RF after the previous action is done. */
88 while (ppsc->rfchange_inprogress) {
89 rfwait_cnt++;
90 mdelay(1);
91 /*Wait too long, return false to avoid
92 *to be stuck here.
93 */
94 if (rfwait_cnt > 100)
95 return false;
96 }
97 } else {
98 ppsc->rfchange_inprogress = true;
99 spin_unlock(&rtlpriv->locks.rf_ps_lock);
100 break;
101 }
102 }
103
104 switch (state_toset) {
105 case ERFON:
106 ppsc->rfoff_reason &= (~changesource);
107
108 if ((changesource == RF_CHANGE_BY_HW) &&
109 (ppsc->hwradiooff)) {
110 ppsc->hwradiooff = false;
111 }
112
113 if (!ppsc->rfoff_reason) {
114 ppsc->rfoff_reason = 0;
115 actionallowed = true;
116 }
117
118 break;
119
120 case ERFOFF:
121
122 if ((changesource == RF_CHANGE_BY_HW) && !ppsc->hwradiooff) {
123 ppsc->hwradiooff = true;
124 }
125
126 ppsc->rfoff_reason |= changesource;
127 actionallowed = true;
128 break;
129
130 case ERFSLEEP:
131 ppsc->rfoff_reason |= changesource;
132 actionallowed = true;
133 break;
134
135 default:
136 pr_err("switch case %#x not processed\n", state_toset);
137 break;
138 }
139
140 if (actionallowed)
141 rtlpriv->cfg->ops->set_rf_power_state(hw, state_toset);
142
143 spin_lock(&rtlpriv->locks.rf_ps_lock);
144 ppsc->rfchange_inprogress = false;
145 spin_unlock(&rtlpriv->locks.rf_ps_lock);
146
147 return actionallowed;
148 }
149
_rtl_ps_inactive_ps(struct ieee80211_hw * hw)150 static void _rtl_ps_inactive_ps(struct ieee80211_hw *hw)
151 {
152 struct rtl_priv *rtlpriv = rtl_priv(hw);
153 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
154 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
155
156 ppsc->swrf_processing = true;
157
158 if (ppsc->inactive_pwrstate == ERFON &&
159 rtlhal->interface == INTF_PCI) {
160 if ((ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM) &&
161 RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
162 rtlpriv->intf_ops->disable_aspm(hw);
163 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
164 }
165 }
166
167 rtl_ps_set_rf_state(hw, ppsc->inactive_pwrstate,
168 RF_CHANGE_BY_IPS);
169
170 if (ppsc->inactive_pwrstate == ERFOFF &&
171 rtlhal->interface == INTF_PCI) {
172 if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM &&
173 !RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
174 rtlpriv->intf_ops->enable_aspm(hw);
175 RT_SET_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
176 }
177 }
178
179 ppsc->swrf_processing = false;
180 }
181
rtl_ips_nic_off_wq_callback(struct work_struct * work)182 void rtl_ips_nic_off_wq_callback(struct work_struct *work)
183 {
184 struct rtl_works *rtlworks = container_of(work, struct rtl_works,
185 ips_nic_off_wq.work);
186 struct ieee80211_hw *hw = rtlworks->hw;
187 struct rtl_priv *rtlpriv = rtl_priv(hw);
188 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
189 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
190 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
191 enum rf_pwrstate rtstate;
192
193 if (mac->opmode != NL80211_IFTYPE_STATION) {
194 rtl_dbg(rtlpriv, COMP_ERR, DBG_WARNING,
195 "not station return\n");
196 return;
197 }
198
199 if (mac->p2p_in_use)
200 return;
201
202 if (mac->link_state > MAC80211_NOLINK)
203 return;
204
205 if (is_hal_stop(rtlhal))
206 return;
207
208 if (rtlpriv->sec.being_setkey)
209 return;
210
211 if (rtlpriv->cfg->ops->bt_coex_off_before_lps)
212 rtlpriv->cfg->ops->bt_coex_off_before_lps(hw);
213
214 if (ppsc->inactiveps) {
215 rtstate = ppsc->rfpwr_state;
216
217 /*
218 *Do not enter IPS in the following conditions:
219 *(1) RF is already OFF or Sleep
220 *(2) swrf_processing (indicates the IPS is still under going)
221 *(3) Connectted (only disconnected can trigger IPS)
222 *(4) IBSS (send Beacon)
223 *(5) AP mode (send Beacon)
224 *(6) monitor mode (rcv packet)
225 */
226
227 if (rtstate == ERFON &&
228 !ppsc->swrf_processing &&
229 (mac->link_state == MAC80211_NOLINK) &&
230 !mac->act_scanning) {
231 rtl_dbg(rtlpriv, COMP_RF, DBG_TRACE,
232 "IPSEnter(): Turn off RF\n");
233
234 ppsc->inactive_pwrstate = ERFOFF;
235 ppsc->in_powersavemode = true;
236
237 /* call before RF off */
238 if (rtlpriv->cfg->ops->get_btc_status())
239 rtlpriv->btcoexist.btc_ops->btc_ips_notify(rtlpriv,
240 ppsc->inactive_pwrstate);
241
242 /*rtl_pci_reset_trx_ring(hw); */
243 _rtl_ps_inactive_ps(hw);
244 }
245 }
246 }
247
rtl_ips_nic_off(struct ieee80211_hw * hw)248 void rtl_ips_nic_off(struct ieee80211_hw *hw)
249 {
250 struct rtl_priv *rtlpriv = rtl_priv(hw);
251
252 /* because when link with ap, mac80211 will ask us
253 * to disable nic quickly after scan before linking,
254 * this will cause link failed, so we delay 100ms here
255 */
256 queue_delayed_work(rtlpriv->works.rtl_wq,
257 &rtlpriv->works.ips_nic_off_wq, MSECS(100));
258 }
259
260 /* NOTICE: any opmode should exc nic_on, or disable without
261 * nic_on may something wrong, like adhoc TP
262 */
rtl_ips_nic_on(struct ieee80211_hw * hw)263 void rtl_ips_nic_on(struct ieee80211_hw *hw)
264 {
265 struct rtl_priv *rtlpriv = rtl_priv(hw);
266 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
267 enum rf_pwrstate rtstate;
268
269 cancel_delayed_work_sync(&rtlpriv->works.ips_nic_off_wq);
270
271 mutex_lock(&rtlpriv->locks.ips_mutex);
272 if (ppsc->inactiveps) {
273 rtstate = ppsc->rfpwr_state;
274
275 if (rtstate != ERFON &&
276 !ppsc->swrf_processing &&
277 ppsc->rfoff_reason <= RF_CHANGE_BY_IPS) {
278
279 ppsc->inactive_pwrstate = ERFON;
280 ppsc->in_powersavemode = false;
281 _rtl_ps_inactive_ps(hw);
282 /* call after RF on */
283 if (rtlpriv->cfg->ops->get_btc_status())
284 rtlpriv->btcoexist.btc_ops->btc_ips_notify(rtlpriv,
285 ppsc->inactive_pwrstate);
286 }
287 }
288 mutex_unlock(&rtlpriv->locks.ips_mutex);
289 }
290 EXPORT_SYMBOL_GPL(rtl_ips_nic_on);
291
292 /*for FW LPS*/
293
294 /*
295 *Determine if we can set Fw into PS mode
296 *in current condition.Return TRUE if it
297 *can enter PS mode.
298 */
rtl_get_fwlps_doze(struct ieee80211_hw * hw)299 static bool rtl_get_fwlps_doze(struct ieee80211_hw *hw)
300 {
301 struct rtl_priv *rtlpriv = rtl_priv(hw);
302 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
303 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
304 u32 ps_timediff;
305
306 ps_timediff = jiffies_to_msecs(jiffies -
307 ppsc->last_delaylps_stamp_jiffies);
308
309 if (ps_timediff < 2000) {
310 rtl_dbg(rtlpriv, COMP_POWER, DBG_LOUD,
311 "Delay enter Fw LPS for DHCP, ARP, or EAPOL exchanging state\n");
312 return false;
313 }
314
315 if (mac->link_state != MAC80211_LINKED)
316 return false;
317
318 if (mac->opmode == NL80211_IFTYPE_ADHOC)
319 return false;
320
321 return true;
322 }
323
324 /* Change current and default preamble mode.*/
rtl_lps_set_psmode(struct ieee80211_hw * hw,u8 rt_psmode)325 void rtl_lps_set_psmode(struct ieee80211_hw *hw, u8 rt_psmode)
326 {
327 struct rtl_priv *rtlpriv = rtl_priv(hw);
328 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
329 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
330 bool enter_fwlps;
331
332 if (mac->opmode == NL80211_IFTYPE_ADHOC)
333 return;
334
335 if (mac->link_state != MAC80211_LINKED)
336 return;
337
338 if (ppsc->dot11_psmode == rt_psmode && rt_psmode == EACTIVE)
339 return;
340
341 /* Update power save mode configured. */
342 ppsc->dot11_psmode = rt_psmode;
343
344 /*
345 *<FW control LPS>
346 *1. Enter PS mode
347 * Set RPWM to Fw to turn RF off and send H2C fw_pwrmode
348 * cmd to set Fw into PS mode.
349 *2. Leave PS mode
350 * Send H2C fw_pwrmode cmd to Fw to set Fw into Active
351 * mode and set RPWM to turn RF on.
352 */
353
354 if ((ppsc->fwctrl_lps) && ppsc->report_linked) {
355 if (ppsc->dot11_psmode == EACTIVE) {
356 rtl_dbg(rtlpriv, COMP_RF, DBG_DMESG,
357 "FW LPS leave ps_mode:%x\n",
358 FW_PS_ACTIVE_MODE);
359 enter_fwlps = false;
360 ppsc->pwr_mode = FW_PS_ACTIVE_MODE;
361 ppsc->smart_ps = 0;
362 rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_FW_LPS_ACTION,
363 (u8 *)(&enter_fwlps));
364 if (ppsc->p2p_ps_info.opp_ps)
365 rtl_p2p_ps_cmd(hw , P2P_PS_ENABLE);
366
367 if (rtlpriv->cfg->ops->get_btc_status())
368 rtlpriv->btcoexist.btc_ops->btc_lps_notify(rtlpriv, rt_psmode);
369 } else {
370 if (rtl_get_fwlps_doze(hw)) {
371 rtl_dbg(rtlpriv, COMP_RF, DBG_DMESG,
372 "FW LPS enter ps_mode:%x\n",
373 ppsc->fwctrl_psmode);
374 if (rtlpriv->cfg->ops->get_btc_status())
375 rtlpriv->btcoexist.btc_ops->btc_lps_notify(rtlpriv, rt_psmode);
376 enter_fwlps = true;
377 ppsc->pwr_mode = ppsc->fwctrl_psmode;
378 ppsc->smart_ps = 2;
379 rtlpriv->cfg->ops->set_hw_reg(hw,
380 HW_VAR_FW_LPS_ACTION,
381 (u8 *)(&enter_fwlps));
382
383 } else {
384 /* Reset the power save related parameters. */
385 ppsc->dot11_psmode = EACTIVE;
386 }
387 }
388 }
389 }
390
391 /* Interrupt safe routine to enter the leisure power save mode.*/
rtl_lps_enter_core(struct ieee80211_hw * hw)392 static void rtl_lps_enter_core(struct ieee80211_hw *hw)
393 {
394 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
395 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
396 struct rtl_priv *rtlpriv = rtl_priv(hw);
397
398 if (!ppsc->fwctrl_lps)
399 return;
400
401 if (rtlpriv->sec.being_setkey)
402 return;
403
404 if (rtlpriv->link_info.busytraffic)
405 return;
406
407 /*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */
408 if (mac->cnt_after_linked < 5)
409 return;
410
411 if (mac->opmode == NL80211_IFTYPE_ADHOC)
412 return;
413
414 if (mac->link_state != MAC80211_LINKED)
415 return;
416
417 mutex_lock(&rtlpriv->locks.lps_mutex);
418
419 /* Don't need to check (ppsc->dot11_psmode == EACTIVE), because
420 * bt_ccoexist may ask to enter lps.
421 * In normal case, this constraint move to rtl_lps_set_psmode().
422 */
423 rtl_dbg(rtlpriv, COMP_POWER, DBG_LOUD,
424 "Enter 802.11 power save mode...\n");
425 rtl_lps_set_psmode(hw, EAUTOPS);
426
427 mutex_unlock(&rtlpriv->locks.lps_mutex);
428 }
429
430 /* Interrupt safe routine to leave the leisure power save mode.*/
rtl_lps_leave_core(struct ieee80211_hw * hw)431 static void rtl_lps_leave_core(struct ieee80211_hw *hw)
432 {
433 struct rtl_priv *rtlpriv = rtl_priv(hw);
434 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
435 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
436
437 mutex_lock(&rtlpriv->locks.lps_mutex);
438
439 if (ppsc->fwctrl_lps) {
440 if (ppsc->dot11_psmode != EACTIVE) {
441
442 /*FIX ME */
443 /*rtlpriv->cfg->ops->enable_interrupt(hw); */
444
445 if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM &&
446 RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM) &&
447 rtlhal->interface == INTF_PCI) {
448 rtlpriv->intf_ops->disable_aspm(hw);
449 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
450 }
451
452 rtl_dbg(rtlpriv, COMP_POWER, DBG_LOUD,
453 "Busy Traffic,Leave 802.11 power save..\n");
454
455 rtl_lps_set_psmode(hw, EACTIVE);
456 }
457 }
458 mutex_unlock(&rtlpriv->locks.lps_mutex);
459 }
460
461 /* For sw LPS*/
rtl_swlps_beacon(struct ieee80211_hw * hw,void * data,unsigned int len)462 void rtl_swlps_beacon(struct ieee80211_hw *hw, void *data, unsigned int len)
463 {
464 struct rtl_priv *rtlpriv = rtl_priv(hw);
465 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
466 struct ieee80211_hdr *hdr = data;
467 struct ieee80211_tim_ie *tim_ie;
468 u8 *tim;
469 u8 tim_len;
470 bool u_buffed;
471 bool m_buffed;
472
473 if (mac->opmode != NL80211_IFTYPE_STATION)
474 return;
475
476 if (!rtlpriv->psc.swctrl_lps)
477 return;
478
479 if (rtlpriv->mac80211.link_state != MAC80211_LINKED)
480 return;
481
482 if (!rtlpriv->psc.sw_ps_enabled)
483 return;
484
485 if (rtlpriv->psc.fwctrl_lps)
486 return;
487
488 if (likely(!(hw->conf.flags & IEEE80211_CONF_PS)))
489 return;
490
491 /* check if this really is a beacon */
492 if (!ieee80211_is_beacon(hdr->frame_control))
493 return;
494
495 /* min. beacon length + FCS_LEN */
496 if (len <= 40 + FCS_LEN)
497 return;
498
499 /* and only beacons from the associated BSSID, please */
500 if (!ether_addr_equal_64bits(hdr->addr3, rtlpriv->mac80211.bssid))
501 return;
502
503 rtlpriv->psc.last_beacon = jiffies;
504
505 tim = rtl_find_ie(data, len - FCS_LEN, WLAN_EID_TIM);
506 if (!tim)
507 return;
508
509 if (tim[1] < sizeof(*tim_ie))
510 return;
511
512 tim_len = tim[1];
513 tim_ie = (struct ieee80211_tim_ie *) &tim[2];
514
515 if (!WARN_ON_ONCE(!hw->conf.ps_dtim_period))
516 rtlpriv->psc.dtim_counter = tim_ie->dtim_count;
517
518 /* Check whenever the PHY can be turned off again. */
519
520 /* 1. What about buffered unicast traffic for our AID? */
521 u_buffed = ieee80211_check_tim(tim_ie, tim_len,
522 rtlpriv->mac80211.assoc_id);
523
524 /* 2. Maybe the AP wants to send multicast/broadcast data? */
525 m_buffed = tim_ie->bitmap_ctrl & 0x01;
526 rtlpriv->psc.multi_buffered = m_buffed;
527
528 /* unicast will process by mac80211 through
529 * set ~IEEE80211_CONF_PS, So we just check
530 * multicast frames here */
531 if (!m_buffed) {
532 /* back to low-power land. and delay is
533 * prevent null power save frame tx fail */
534 queue_delayed_work(rtlpriv->works.rtl_wq,
535 &rtlpriv->works.ps_work, MSECS(5));
536 } else {
537 rtl_dbg(rtlpriv, COMP_POWER, DBG_DMESG,
538 "u_bufferd: %x, m_buffered: %x\n", u_buffed, m_buffed);
539 }
540 }
541 EXPORT_SYMBOL_GPL(rtl_swlps_beacon);
542
rtl_swlps_rf_awake(struct ieee80211_hw * hw)543 void rtl_swlps_rf_awake(struct ieee80211_hw *hw)
544 {
545 struct rtl_priv *rtlpriv = rtl_priv(hw);
546 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
547 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
548
549 if (!rtlpriv->psc.swctrl_lps)
550 return;
551 if (mac->link_state != MAC80211_LINKED)
552 return;
553
554 if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM &&
555 RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
556 rtlpriv->intf_ops->disable_aspm(hw);
557 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
558 }
559
560 mutex_lock(&rtlpriv->locks.lps_mutex);
561 rtl_ps_set_rf_state(hw, ERFON, RF_CHANGE_BY_PS);
562 mutex_unlock(&rtlpriv->locks.lps_mutex);
563 }
564
rtl_swlps_rfon_wq_callback(struct work_struct * work)565 void rtl_swlps_rfon_wq_callback(struct work_struct *work)
566 {
567 struct rtl_works *rtlworks = container_of(work, struct rtl_works,
568 ps_rfon_wq.work);
569 struct ieee80211_hw *hw = rtlworks->hw;
570
571 rtl_swlps_rf_awake(hw);
572 }
573
rtl_swlps_rf_sleep(struct ieee80211_hw * hw)574 void rtl_swlps_rf_sleep(struct ieee80211_hw *hw)
575 {
576 struct rtl_priv *rtlpriv = rtl_priv(hw);
577 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
578 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
579 u8 sleep_intv;
580
581 if (!rtlpriv->psc.sw_ps_enabled)
582 return;
583
584 if ((rtlpriv->sec.being_setkey) ||
585 (mac->opmode == NL80211_IFTYPE_ADHOC))
586 return;
587
588 /*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */
589 if ((mac->link_state != MAC80211_LINKED) || (mac->cnt_after_linked < 5))
590 return;
591
592 if (rtlpriv->link_info.busytraffic)
593 return;
594
595 spin_lock(&rtlpriv->locks.rf_ps_lock);
596 if (rtlpriv->psc.rfchange_inprogress) {
597 spin_unlock(&rtlpriv->locks.rf_ps_lock);
598 return;
599 }
600 spin_unlock(&rtlpriv->locks.rf_ps_lock);
601
602 mutex_lock(&rtlpriv->locks.lps_mutex);
603 rtl_ps_set_rf_state(hw, ERFSLEEP, RF_CHANGE_BY_PS);
604 mutex_unlock(&rtlpriv->locks.lps_mutex);
605
606 if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM &&
607 !RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
608 rtlpriv->intf_ops->enable_aspm(hw);
609 RT_SET_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
610 }
611
612 /* here is power save alg, when this beacon is DTIM
613 * we will set sleep time to dtim_period * n;
614 * when this beacon is not DTIM, we will set sleep
615 * time to sleep_intv = rtlpriv->psc.dtim_counter or
616 * MAX_SW_LPS_SLEEP_INTV(default set to 5) */
617
618 if (rtlpriv->psc.dtim_counter == 0) {
619 if (hw->conf.ps_dtim_period == 1)
620 sleep_intv = hw->conf.ps_dtim_period * 2;
621 else
622 sleep_intv = hw->conf.ps_dtim_period;
623 } else {
624 sleep_intv = rtlpriv->psc.dtim_counter;
625 }
626
627 if (sleep_intv > MAX_SW_LPS_SLEEP_INTV)
628 sleep_intv = MAX_SW_LPS_SLEEP_INTV;
629
630 /* this print should always be dtim_conter = 0 &
631 * sleep = dtim_period, that meaons, we should
632 * awake before every dtim */
633 rtl_dbg(rtlpriv, COMP_POWER, DBG_DMESG,
634 "dtim_counter:%x will sleep :%d beacon_intv\n",
635 rtlpriv->psc.dtim_counter, sleep_intv);
636
637 /* we tested that 40ms is enough for sw & hw sw delay */
638 queue_delayed_work(rtlpriv->works.rtl_wq, &rtlpriv->works.ps_rfon_wq,
639 MSECS(sleep_intv * mac->vif->bss_conf.beacon_int - 40));
640 }
641
rtl_lps_change_work_callback(struct work_struct * work)642 void rtl_lps_change_work_callback(struct work_struct *work)
643 {
644 struct rtl_works *rtlworks =
645 container_of(work, struct rtl_works, lps_change_work);
646 struct ieee80211_hw *hw = rtlworks->hw;
647 struct rtl_priv *rtlpriv = rtl_priv(hw);
648
649 if (rtlpriv->enter_ps)
650 rtl_lps_enter_core(hw);
651 else
652 rtl_lps_leave_core(hw);
653 }
654 EXPORT_SYMBOL_GPL(rtl_lps_change_work_callback);
655
rtl_lps_enter(struct ieee80211_hw * hw,bool may_block)656 void rtl_lps_enter(struct ieee80211_hw *hw, bool may_block)
657 {
658 struct rtl_priv *rtlpriv = rtl_priv(hw);
659
660 if (may_block)
661 return rtl_lps_enter_core(hw);
662 rtlpriv->enter_ps = true;
663 schedule_work(&rtlpriv->works.lps_change_work);
664 }
665 EXPORT_SYMBOL_GPL(rtl_lps_enter);
666
rtl_lps_leave(struct ieee80211_hw * hw,bool may_block)667 void rtl_lps_leave(struct ieee80211_hw *hw, bool may_block)
668 {
669 struct rtl_priv *rtlpriv = rtl_priv(hw);
670
671 if (may_block)
672 return rtl_lps_leave_core(hw);
673 rtlpriv->enter_ps = false;
674 schedule_work(&rtlpriv->works.lps_change_work);
675 }
676 EXPORT_SYMBOL_GPL(rtl_lps_leave);
677
rtl_swlps_wq_callback(struct work_struct * work)678 void rtl_swlps_wq_callback(struct work_struct *work)
679 {
680 struct rtl_works *rtlworks = container_of(work, struct rtl_works,
681 ps_work.work);
682 struct ieee80211_hw *hw = rtlworks->hw;
683 struct rtl_priv *rtlpriv = rtl_priv(hw);
684 bool ps = false;
685
686 ps = (hw->conf.flags & IEEE80211_CONF_PS);
687
688 /* we can sleep after ps null send ok */
689 if (rtlpriv->psc.state_inap) {
690 rtl_swlps_rf_sleep(hw);
691
692 if (rtlpriv->psc.state && !ps) {
693 rtlpriv->psc.sleep_ms = jiffies_to_msecs(jiffies -
694 rtlpriv->psc.last_action);
695 }
696
697 if (ps)
698 rtlpriv->psc.last_slept = jiffies;
699
700 rtlpriv->psc.last_action = jiffies;
701 rtlpriv->psc.state = ps;
702 }
703 }
704
rtl_p2p_noa_ie(struct ieee80211_hw * hw,void * data,unsigned int len)705 static void rtl_p2p_noa_ie(struct ieee80211_hw *hw, void *data,
706 unsigned int len)
707 {
708 struct rtl_priv *rtlpriv = rtl_priv(hw);
709 struct ieee80211_mgmt *mgmt = data;
710 struct rtl_p2p_ps_info *p2pinfo = &(rtlpriv->psc.p2p_ps_info);
711 u8 *pos, *end, *ie;
712 u16 noa_len;
713 static u8 p2p_oui_ie_type[4] = {0x50, 0x6f, 0x9a, 0x09};
714 u8 noa_num, index , i, noa_index = 0;
715 bool find_p2p_ie = false , find_p2p_ps_ie = false;
716
717 pos = (u8 *)mgmt->u.beacon.variable;
718 end = data + len;
719 ie = NULL;
720
721 while (pos + 1 < end) {
722 if (pos + 2 + pos[1] > end)
723 return;
724
725 if (pos[0] == 221 && pos[1] > 4) {
726 if (memcmp(&pos[2], p2p_oui_ie_type, 4) == 0) {
727 ie = pos + 2+4;
728 break;
729 }
730 }
731 pos += 2 + pos[1];
732 }
733
734 if (ie == NULL)
735 return;
736 find_p2p_ie = true;
737 /*to find noa ie*/
738 while (ie + 1 < end) {
739 noa_len = le16_to_cpu(*((__le16 *)&ie[1]));
740 if (ie + 3 + ie[1] > end)
741 return;
742
743 if (ie[0] == 12) {
744 find_p2p_ps_ie = true;
745 if ((noa_len - 2) % 13 != 0) {
746 rtl_dbg(rtlpriv, COMP_INIT, DBG_LOUD,
747 "P2P notice of absence: invalid length.%d\n",
748 noa_len);
749 return;
750 } else {
751 noa_num = (noa_len - 2) / 13;
752 if (noa_num > P2P_MAX_NOA_NUM)
753 noa_num = P2P_MAX_NOA_NUM;
754
755 }
756 noa_index = ie[3];
757 if (rtlpriv->psc.p2p_ps_info.p2p_ps_mode ==
758 P2P_PS_NONE || noa_index != p2pinfo->noa_index) {
759 rtl_dbg(rtlpriv, COMP_FW, DBG_LOUD,
760 "update NOA ie.\n");
761 p2pinfo->noa_index = noa_index;
762 p2pinfo->opp_ps = (ie[4] >> 7);
763 p2pinfo->ctwindow = ie[4] & 0x7F;
764 p2pinfo->noa_num = noa_num;
765 index = 5;
766 for (i = 0; i < noa_num; i++) {
767 p2pinfo->noa_count_type[i] =
768 *(u8 *)(ie + index);
769 index += 1;
770 p2pinfo->noa_duration[i] =
771 le32_to_cpu(*(__le32 *)(ie + index));
772 index += 4;
773 p2pinfo->noa_interval[i] =
774 le32_to_cpu(*(__le32 *)(ie + index));
775 index += 4;
776 p2pinfo->noa_start_time[i] =
777 le32_to_cpu(*(__le32 *)(ie + index));
778 index += 4;
779 }
780
781 if (p2pinfo->opp_ps == 1) {
782 p2pinfo->p2p_ps_mode = P2P_PS_CTWINDOW;
783 /* Driver should wait LPS entering
784 * CTWindow
785 */
786 if (rtlpriv->psc.fw_current_inpsmode)
787 rtl_p2p_ps_cmd(hw,
788 P2P_PS_ENABLE);
789 } else if (p2pinfo->noa_num > 0) {
790 p2pinfo->p2p_ps_mode = P2P_PS_NOA;
791 rtl_p2p_ps_cmd(hw, P2P_PS_ENABLE);
792 } else if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
793 rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE);
794 }
795 }
796 break;
797 }
798 ie += 3 + noa_len;
799 }
800
801 if (find_p2p_ie == true) {
802 if ((p2pinfo->p2p_ps_mode > P2P_PS_NONE) &&
803 (find_p2p_ps_ie == false))
804 rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE);
805 }
806 }
807
rtl_p2p_action_ie(struct ieee80211_hw * hw,void * data,unsigned int len)808 static void rtl_p2p_action_ie(struct ieee80211_hw *hw, void *data,
809 unsigned int len)
810 {
811 struct rtl_priv *rtlpriv = rtl_priv(hw);
812 struct ieee80211_mgmt *mgmt = data;
813 struct rtl_p2p_ps_info *p2pinfo = &(rtlpriv->psc.p2p_ps_info);
814 u8 noa_num, index , i , noa_index = 0;
815 u8 *pos, *end, *ie;
816 u16 noa_len;
817 static u8 p2p_oui_ie_type[4] = {0x50, 0x6f, 0x9a, 0x09};
818
819 pos = (u8 *)&mgmt->u.action.category;
820 end = data + len;
821 ie = NULL;
822
823 if (pos[0] == 0x7f) {
824 if (memcmp(&pos[1], p2p_oui_ie_type, 4) == 0)
825 ie = pos + 3+4;
826 }
827
828 if (ie == NULL)
829 return;
830
831 rtl_dbg(rtlpriv, COMP_FW, DBG_LOUD, "action frame find P2P IE.\n");
832 /*to find noa ie*/
833 while (ie + 1 < end) {
834 noa_len = le16_to_cpu(*(__le16 *)&ie[1]);
835 if (ie + 3 + ie[1] > end)
836 return;
837
838 if (ie[0] == 12) {
839 rtl_dbg(rtlpriv, COMP_FW, DBG_LOUD, "find NOA IE.\n");
840 RT_PRINT_DATA(rtlpriv, COMP_FW, DBG_LOUD, "noa ie ",
841 ie, noa_len);
842 if ((noa_len - 2) % 13 != 0) {
843 rtl_dbg(rtlpriv, COMP_FW, DBG_LOUD,
844 "P2P notice of absence: invalid length.%d\n",
845 noa_len);
846 return;
847 } else {
848 noa_num = (noa_len - 2) / 13;
849 if (noa_num > P2P_MAX_NOA_NUM)
850 noa_num = P2P_MAX_NOA_NUM;
851
852 }
853 noa_index = ie[3];
854 if (rtlpriv->psc.p2p_ps_info.p2p_ps_mode ==
855 P2P_PS_NONE || noa_index != p2pinfo->noa_index) {
856 p2pinfo->noa_index = noa_index;
857 p2pinfo->opp_ps = (ie[4] >> 7);
858 p2pinfo->ctwindow = ie[4] & 0x7F;
859 p2pinfo->noa_num = noa_num;
860 index = 5;
861 for (i = 0; i < noa_num; i++) {
862 p2pinfo->noa_count_type[i] =
863 *(u8 *)(ie + index);
864 index += 1;
865 p2pinfo->noa_duration[i] =
866 le32_to_cpu(*(__le32 *)(ie + index));
867 index += 4;
868 p2pinfo->noa_interval[i] =
869 le32_to_cpu(*(__le32 *)(ie + index));
870 index += 4;
871 p2pinfo->noa_start_time[i] =
872 le32_to_cpu(*(__le32 *)(ie + index));
873 index += 4;
874 }
875
876 if (p2pinfo->opp_ps == 1) {
877 p2pinfo->p2p_ps_mode = P2P_PS_CTWINDOW;
878 /* Driver should wait LPS entering
879 * CTWindow
880 */
881 if (rtlpriv->psc.fw_current_inpsmode)
882 rtl_p2p_ps_cmd(hw,
883 P2P_PS_ENABLE);
884 } else if (p2pinfo->noa_num > 0) {
885 p2pinfo->p2p_ps_mode = P2P_PS_NOA;
886 rtl_p2p_ps_cmd(hw, P2P_PS_ENABLE);
887 } else if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
888 rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE);
889 }
890 }
891 break;
892 }
893 ie += 3 + noa_len;
894 }
895 }
896
rtl_p2p_ps_cmd(struct ieee80211_hw * hw,u8 p2p_ps_state)897 void rtl_p2p_ps_cmd(struct ieee80211_hw *hw , u8 p2p_ps_state)
898 {
899 struct rtl_priv *rtlpriv = rtl_priv(hw);
900 struct rtl_ps_ctl *rtlps = rtl_psc(rtl_priv(hw));
901 struct rtl_p2p_ps_info *p2pinfo = &(rtlpriv->psc.p2p_ps_info);
902
903 rtl_dbg(rtlpriv, COMP_FW, DBG_LOUD, " p2p state %x\n", p2p_ps_state);
904 switch (p2p_ps_state) {
905 case P2P_PS_DISABLE:
906 p2pinfo->p2p_ps_state = p2p_ps_state;
907 rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_H2C_FW_P2P_PS_OFFLOAD,
908 &p2p_ps_state);
909 p2pinfo->noa_index = 0;
910 p2pinfo->ctwindow = 0;
911 p2pinfo->opp_ps = 0;
912 p2pinfo->noa_num = 0;
913 p2pinfo->p2p_ps_mode = P2P_PS_NONE;
914 if (rtlps->fw_current_inpsmode) {
915 if (rtlps->smart_ps == 0) {
916 rtlps->smart_ps = 2;
917 rtlpriv->cfg->ops->set_hw_reg(hw,
918 HW_VAR_H2C_FW_PWRMODE,
919 &rtlps->pwr_mode);
920 }
921
922 }
923 break;
924 case P2P_PS_ENABLE:
925 if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
926 p2pinfo->p2p_ps_state = p2p_ps_state;
927
928 if (p2pinfo->ctwindow > 0) {
929 if (rtlps->smart_ps != 0) {
930 rtlps->smart_ps = 0;
931 rtlpriv->cfg->ops->set_hw_reg(hw,
932 HW_VAR_H2C_FW_PWRMODE,
933 &rtlps->pwr_mode);
934 }
935 }
936 rtlpriv->cfg->ops->set_hw_reg(hw,
937 HW_VAR_H2C_FW_P2P_PS_OFFLOAD,
938 &p2p_ps_state);
939
940 }
941 break;
942 case P2P_PS_SCAN:
943 case P2P_PS_SCAN_DONE:
944 case P2P_PS_ALLSTASLEEP:
945 if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
946 p2pinfo->p2p_ps_state = p2p_ps_state;
947 rtlpriv->cfg->ops->set_hw_reg(hw,
948 HW_VAR_H2C_FW_P2P_PS_OFFLOAD,
949 &p2p_ps_state);
950 }
951 break;
952 default:
953 break;
954 }
955 rtl_dbg(rtlpriv, COMP_FW, DBG_LOUD,
956 "ctwindow %x oppps %x\n",
957 p2pinfo->ctwindow, p2pinfo->opp_ps);
958 rtl_dbg(rtlpriv, COMP_FW, DBG_LOUD,
959 "count %x duration %x index %x interval %x start time %x noa num %x\n",
960 p2pinfo->noa_count_type[0],
961 p2pinfo->noa_duration[0],
962 p2pinfo->noa_index,
963 p2pinfo->noa_interval[0],
964 p2pinfo->noa_start_time[0],
965 p2pinfo->noa_num);
966 rtl_dbg(rtlpriv, COMP_FW, DBG_LOUD, "end\n");
967 }
968
rtl_p2p_info(struct ieee80211_hw * hw,void * data,unsigned int len)969 void rtl_p2p_info(struct ieee80211_hw *hw, void *data, unsigned int len)
970 {
971 struct rtl_priv *rtlpriv = rtl_priv(hw);
972 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
973 struct ieee80211_hdr *hdr = data;
974
975 if (!mac->p2p)
976 return;
977 if (mac->link_state != MAC80211_LINKED)
978 return;
979 /* min. beacon length + FCS_LEN */
980 if (len <= 40 + FCS_LEN)
981 return;
982
983 /* and only beacons from the associated BSSID, please */
984 if (!ether_addr_equal_64bits(hdr->addr3, rtlpriv->mac80211.bssid))
985 return;
986
987 /* check if this really is a beacon */
988 if (!(ieee80211_is_beacon(hdr->frame_control) ||
989 ieee80211_is_probe_resp(hdr->frame_control) ||
990 ieee80211_is_action(hdr->frame_control)))
991 return;
992
993 if (ieee80211_is_action(hdr->frame_control))
994 rtl_p2p_action_ie(hw , data , len - FCS_LEN);
995 else
996 rtl_p2p_noa_ie(hw , data , len - FCS_LEN);
997 }
998 EXPORT_SYMBOL_GPL(rtl_p2p_info);
999
