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slip: Fix use-after-free Read in slip_open
[mirror_ubuntu-jammy-kernel.git] / drivers / net / wireless / realtek / rtlwifi / ps.c
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
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 RT_TRACE(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
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
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 enum rf_pwrstate rtstate;
72 bool actionallowed = false;
73 u16 rfwait_cnt = 0;
74
75 /*Only one thread can change
76 *the RF state at one time, and others
77 *should wait to be executed.
78 */
79 while (true) {
80 spin_lock(&rtlpriv->locks.rf_ps_lock);
81 if (ppsc->rfchange_inprogress) {
82 spin_unlock(&rtlpriv->locks.rf_ps_lock);
83
84 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
85 "RF Change in progress! Wait to set..state_toset(%d).\n",
86 state_toset);
87
88 /* Set RF after the previous action is done. */
89 while (ppsc->rfchange_inprogress) {
90 rfwait_cnt++;
91 mdelay(1);
92 /*Wait too long, return false to avoid
93 *to be stuck here.
94 */
95 if (rfwait_cnt > 100)
96 return false;
97 }
98 } else {
99 ppsc->rfchange_inprogress = true;
100 spin_unlock(&rtlpriv->locks.rf_ps_lock);
101 break;
102 }
103 }
104
105 rtstate = ppsc->rfpwr_state;
106
107 switch (state_toset) {
108 case ERFON:
109 ppsc->rfoff_reason &= (~changesource);
110
111 if ((changesource == RF_CHANGE_BY_HW) &&
112 (ppsc->hwradiooff)) {
113 ppsc->hwradiooff = false;
114 }
115
116 if (!ppsc->rfoff_reason) {
117 ppsc->rfoff_reason = 0;
118 actionallowed = true;
119 }
120
121 break;
122
123 case ERFOFF:
124
125 if ((changesource == RF_CHANGE_BY_HW) && !ppsc->hwradiooff) {
126 ppsc->hwradiooff = true;
127 }
128
129 ppsc->rfoff_reason |= changesource;
130 actionallowed = true;
131 break;
132
133 case ERFSLEEP:
134 ppsc->rfoff_reason |= changesource;
135 actionallowed = true;
136 break;
137
138 default:
139 pr_err("switch case %#x not processed\n", state_toset);
140 break;
141 }
142
143 if (actionallowed)
144 rtlpriv->cfg->ops->set_rf_power_state(hw, state_toset);
145
146 spin_lock(&rtlpriv->locks.rf_ps_lock);
147 ppsc->rfchange_inprogress = false;
148 spin_unlock(&rtlpriv->locks.rf_ps_lock);
149
150 return actionallowed;
151 }
152
153 static void _rtl_ps_inactive_ps(struct ieee80211_hw *hw)
154 {
155 struct rtl_priv *rtlpriv = rtl_priv(hw);
156 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
157 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
158
159 ppsc->swrf_processing = true;
160
161 if (ppsc->inactive_pwrstate == ERFON &&
162 rtlhal->interface == INTF_PCI) {
163 if ((ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM) &&
164 RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM) &&
165 rtlhal->interface == INTF_PCI) {
166 rtlpriv->intf_ops->disable_aspm(hw);
167 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
168 }
169 }
170
171 rtl_ps_set_rf_state(hw, ppsc->inactive_pwrstate,
172 RF_CHANGE_BY_IPS);
173
174 if (ppsc->inactive_pwrstate == ERFOFF &&
175 rtlhal->interface == INTF_PCI) {
176 if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM &&
177 !RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
178 rtlpriv->intf_ops->enable_aspm(hw);
179 RT_SET_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
180 }
181 }
182
183 ppsc->swrf_processing = false;
184 }
185
186 void rtl_ips_nic_off_wq_callback(void *data)
187 {
188 struct rtl_works *rtlworks =
189 container_of_dwork_rtl(data, struct rtl_works, ips_nic_off_wq);
190 struct ieee80211_hw *hw = rtlworks->hw;
191 struct rtl_priv *rtlpriv = rtl_priv(hw);
192 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
193 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
194 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
195 enum rf_pwrstate rtstate;
196
197 if (mac->opmode != NL80211_IFTYPE_STATION) {
198 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
199 "not station return\n");
200 return;
201 }
202
203 if (mac->p2p_in_use)
204 return;
205
206 if (mac->link_state > MAC80211_NOLINK)
207 return;
208
209 if (is_hal_stop(rtlhal))
210 return;
211
212 if (rtlpriv->sec.being_setkey)
213 return;
214
215 if (rtlpriv->cfg->ops->bt_coex_off_before_lps)
216 rtlpriv->cfg->ops->bt_coex_off_before_lps(hw);
217
218 if (ppsc->inactiveps) {
219 rtstate = ppsc->rfpwr_state;
220
221 /*
222 *Do not enter IPS in the following conditions:
223 *(1) RF is already OFF or Sleep
224 *(2) swrf_processing (indicates the IPS is still under going)
225 *(3) Connectted (only disconnected can trigger IPS)
226 *(4) IBSS (send Beacon)
227 *(5) AP mode (send Beacon)
228 *(6) monitor mode (rcv packet)
229 */
230
231 if (rtstate == ERFON &&
232 !ppsc->swrf_processing &&
233 (mac->link_state == MAC80211_NOLINK) &&
234 !mac->act_scanning) {
235 RT_TRACE(rtlpriv, COMP_RF, DBG_TRACE,
236 "IPSEnter(): Turn off RF\n");
237
238 ppsc->inactive_pwrstate = ERFOFF;
239 ppsc->in_powersavemode = true;
240
241 /* call before RF off */
242 if (rtlpriv->cfg->ops->get_btc_status())
243 rtlpriv->btcoexist.btc_ops->btc_ips_notify(rtlpriv,
244 ppsc->inactive_pwrstate);
245
246 /*rtl_pci_reset_trx_ring(hw); */
247 _rtl_ps_inactive_ps(hw);
248 }
249 }
250 }
251
252 void rtl_ips_nic_off(struct ieee80211_hw *hw)
253 {
254 struct rtl_priv *rtlpriv = rtl_priv(hw);
255
256 /* because when link with ap, mac80211 will ask us
257 * to disable nic quickly after scan before linking,
258 * this will cause link failed, so we delay 100ms here
259 */
260 queue_delayed_work(rtlpriv->works.rtl_wq,
261 &rtlpriv->works.ips_nic_off_wq, MSECS(100));
262 }
263
264 /* NOTICE: any opmode should exc nic_on, or disable without
265 * nic_on may something wrong, like adhoc TP
266 */
267 void rtl_ips_nic_on(struct ieee80211_hw *hw)
268 {
269 struct rtl_priv *rtlpriv = rtl_priv(hw);
270 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
271 enum rf_pwrstate rtstate;
272
273 cancel_delayed_work_sync(&rtlpriv->works.ips_nic_off_wq);
274
275 mutex_lock(&rtlpriv->locks.ips_mutex);
276 if (ppsc->inactiveps) {
277 rtstate = ppsc->rfpwr_state;
278
279 if (rtstate != ERFON &&
280 !ppsc->swrf_processing &&
281 ppsc->rfoff_reason <= RF_CHANGE_BY_IPS) {
282
283 ppsc->inactive_pwrstate = ERFON;
284 ppsc->in_powersavemode = false;
285 _rtl_ps_inactive_ps(hw);
286 /* call after RF on */
287 if (rtlpriv->cfg->ops->get_btc_status())
288 rtlpriv->btcoexist.btc_ops->btc_ips_notify(rtlpriv,
289 ppsc->inactive_pwrstate);
290 }
291 }
292 mutex_unlock(&rtlpriv->locks.ips_mutex);
293 }
294 EXPORT_SYMBOL_GPL(rtl_ips_nic_on);
295
296 /*for FW LPS*/
297
298 /*
299 *Determine if we can set Fw into PS mode
300 *in current condition.Return TRUE if it
301 *can enter PS mode.
302 */
303 static bool rtl_get_fwlps_doze(struct ieee80211_hw *hw)
304 {
305 struct rtl_priv *rtlpriv = rtl_priv(hw);
306 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
307 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
308 u32 ps_timediff;
309
310 ps_timediff = jiffies_to_msecs(jiffies -
311 ppsc->last_delaylps_stamp_jiffies);
312
313 if (ps_timediff < 2000) {
314 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
315 "Delay enter Fw LPS for DHCP, ARP, or EAPOL exchanging state\n");
316 return false;
317 }
318
319 if (mac->link_state != MAC80211_LINKED)
320 return false;
321
322 if (mac->opmode == NL80211_IFTYPE_ADHOC)
323 return false;
324
325 return true;
326 }
327
328 /* Change current and default preamble mode.*/
329 void rtl_lps_set_psmode(struct ieee80211_hw *hw, u8 rt_psmode)
330 {
331 struct rtl_priv *rtlpriv = rtl_priv(hw);
332 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
333 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
334 bool enter_fwlps;
335
336 if (mac->opmode == NL80211_IFTYPE_ADHOC)
337 return;
338
339 if (mac->link_state != MAC80211_LINKED)
340 return;
341
342 if (ppsc->dot11_psmode == rt_psmode && rt_psmode == EACTIVE)
343 return;
344
345 /* Update power save mode configured. */
346 ppsc->dot11_psmode = rt_psmode;
347
348 /*
349 *<FW control LPS>
350 *1. Enter PS mode
351 * Set RPWM to Fw to turn RF off and send H2C fw_pwrmode
352 * cmd to set Fw into PS mode.
353 *2. Leave PS mode
354 * Send H2C fw_pwrmode cmd to Fw to set Fw into Active
355 * mode and set RPWM to turn RF on.
356 */
357
358 if ((ppsc->fwctrl_lps) && ppsc->report_linked) {
359 if (ppsc->dot11_psmode == EACTIVE) {
360 RT_TRACE(rtlpriv, COMP_RF, DBG_DMESG,
361 "FW LPS leave ps_mode:%x\n",
362 FW_PS_ACTIVE_MODE);
363 enter_fwlps = false;
364 ppsc->pwr_mode = FW_PS_ACTIVE_MODE;
365 ppsc->smart_ps = 0;
366 rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_FW_LPS_ACTION,
367 (u8 *)(&enter_fwlps));
368 if (ppsc->p2p_ps_info.opp_ps)
369 rtl_p2p_ps_cmd(hw , P2P_PS_ENABLE);
370
371 if (rtlpriv->cfg->ops->get_btc_status())
372 rtlpriv->btcoexist.btc_ops->btc_lps_notify(rtlpriv, rt_psmode);
373 } else {
374 if (rtl_get_fwlps_doze(hw)) {
375 RT_TRACE(rtlpriv, COMP_RF, DBG_DMESG,
376 "FW LPS enter ps_mode:%x\n",
377 ppsc->fwctrl_psmode);
378 if (rtlpriv->cfg->ops->get_btc_status())
379 rtlpriv->btcoexist.btc_ops->btc_lps_notify(rtlpriv, rt_psmode);
380 enter_fwlps = true;
381 ppsc->pwr_mode = ppsc->fwctrl_psmode;
382 ppsc->smart_ps = 2;
383 rtlpriv->cfg->ops->set_hw_reg(hw,
384 HW_VAR_FW_LPS_ACTION,
385 (u8 *)(&enter_fwlps));
386
387 } else {
388 /* Reset the power save related parameters. */
389 ppsc->dot11_psmode = EACTIVE;
390 }
391 }
392 }
393 }
394
395 /* Interrupt safe routine to enter the leisure power save mode.*/
396 static void rtl_lps_enter_core(struct ieee80211_hw *hw)
397 {
398 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
399 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
400 struct rtl_priv *rtlpriv = rtl_priv(hw);
401
402 if (!ppsc->fwctrl_lps)
403 return;
404
405 if (rtlpriv->sec.being_setkey)
406 return;
407
408 if (rtlpriv->link_info.busytraffic)
409 return;
410
411 /*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */
412 if (mac->cnt_after_linked < 5)
413 return;
414
415 if (mac->opmode == NL80211_IFTYPE_ADHOC)
416 return;
417
418 if (mac->link_state != MAC80211_LINKED)
419 return;
420
421 mutex_lock(&rtlpriv->locks.lps_mutex);
422
423 /* Don't need to check (ppsc->dot11_psmode == EACTIVE), because
424 * bt_ccoexist may ask to enter lps.
425 * In normal case, this constraint move to rtl_lps_set_psmode().
426 */
427 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
428 "Enter 802.11 power save mode...\n");
429 rtl_lps_set_psmode(hw, EAUTOPS);
430
431 mutex_unlock(&rtlpriv->locks.lps_mutex);
432 }
433
434 /* Interrupt safe routine to leave the leisure power save mode.*/
435 static void rtl_lps_leave_core(struct ieee80211_hw *hw)
436 {
437 struct rtl_priv *rtlpriv = rtl_priv(hw);
438 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
439 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
440
441 mutex_lock(&rtlpriv->locks.lps_mutex);
442
443 if (ppsc->fwctrl_lps) {
444 if (ppsc->dot11_psmode != EACTIVE) {
445
446 /*FIX ME */
447 /*rtlpriv->cfg->ops->enable_interrupt(hw); */
448
449 if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM &&
450 RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM) &&
451 rtlhal->interface == INTF_PCI) {
452 rtlpriv->intf_ops->disable_aspm(hw);
453 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
454 }
455
456 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
457 "Busy Traffic,Leave 802.11 power save..\n");
458
459 rtl_lps_set_psmode(hw, EACTIVE);
460 }
461 }
462 mutex_unlock(&rtlpriv->locks.lps_mutex);
463 }
464
465 /* For sw LPS*/
466 void rtl_swlps_beacon(struct ieee80211_hw *hw, void *data, unsigned int len)
467 {
468 struct rtl_priv *rtlpriv = rtl_priv(hw);
469 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
470 struct ieee80211_hdr *hdr = data;
471 struct ieee80211_tim_ie *tim_ie;
472 u8 *tim;
473 u8 tim_len;
474 bool u_buffed;
475 bool m_buffed;
476
477 if (mac->opmode != NL80211_IFTYPE_STATION)
478 return;
479
480 if (!rtlpriv->psc.swctrl_lps)
481 return;
482
483 if (rtlpriv->mac80211.link_state != MAC80211_LINKED)
484 return;
485
486 if (!rtlpriv->psc.sw_ps_enabled)
487 return;
488
489 if (rtlpriv->psc.fwctrl_lps)
490 return;
491
492 if (likely(!(hw->conf.flags & IEEE80211_CONF_PS)))
493 return;
494
495 /* check if this really is a beacon */
496 if (!ieee80211_is_beacon(hdr->frame_control))
497 return;
498
499 /* min. beacon length + FCS_LEN */
500 if (len <= 40 + FCS_LEN)
501 return;
502
503 /* and only beacons from the associated BSSID, please */
504 if (!ether_addr_equal_64bits(hdr->addr3, rtlpriv->mac80211.bssid))
505 return;
506
507 rtlpriv->psc.last_beacon = jiffies;
508
509 tim = rtl_find_ie(data, len - FCS_LEN, WLAN_EID_TIM);
510 if (!tim)
511 return;
512
513 if (tim[1] < sizeof(*tim_ie))
514 return;
515
516 tim_len = tim[1];
517 tim_ie = (struct ieee80211_tim_ie *) &tim[2];
518
519 if (!WARN_ON_ONCE(!hw->conf.ps_dtim_period))
520 rtlpriv->psc.dtim_counter = tim_ie->dtim_count;
521
522 /* Check whenever the PHY can be turned off again. */
523
524 /* 1. What about buffered unicast traffic for our AID? */
525 u_buffed = ieee80211_check_tim(tim_ie, tim_len,
526 rtlpriv->mac80211.assoc_id);
527
528 /* 2. Maybe the AP wants to send multicast/broadcast data? */
529 m_buffed = tim_ie->bitmap_ctrl & 0x01;
530 rtlpriv->psc.multi_buffered = m_buffed;
531
532 /* unicast will process by mac80211 through
533 * set ~IEEE80211_CONF_PS, So we just check
534 * multicast frames here */
535 if (!m_buffed) {
536 /* back to low-power land. and delay is
537 * prevent null power save frame tx fail */
538 queue_delayed_work(rtlpriv->works.rtl_wq,
539 &rtlpriv->works.ps_work, MSECS(5));
540 } else {
541 RT_TRACE(rtlpriv, COMP_POWER, DBG_DMESG,
542 "u_bufferd: %x, m_buffered: %x\n", u_buffed, m_buffed);
543 }
544 }
545 EXPORT_SYMBOL_GPL(rtl_swlps_beacon);
546
547 void rtl_swlps_rf_awake(struct ieee80211_hw *hw)
548 {
549 struct rtl_priv *rtlpriv = rtl_priv(hw);
550 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
551 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
552
553 if (!rtlpriv->psc.swctrl_lps)
554 return;
555 if (mac->link_state != MAC80211_LINKED)
556 return;
557
558 if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM &&
559 RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
560 rtlpriv->intf_ops->disable_aspm(hw);
561 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
562 }
563
564 mutex_lock(&rtlpriv->locks.lps_mutex);
565 rtl_ps_set_rf_state(hw, ERFON, RF_CHANGE_BY_PS);
566 mutex_unlock(&rtlpriv->locks.lps_mutex);
567 }
568
569 void rtl_swlps_rfon_wq_callback(void *data)
570 {
571 struct rtl_works *rtlworks =
572 container_of_dwork_rtl(data, struct rtl_works, ps_rfon_wq);
573 struct ieee80211_hw *hw = rtlworks->hw;
574
575 rtl_swlps_rf_awake(hw);
576 }
577
578 void rtl_swlps_rf_sleep(struct ieee80211_hw *hw)
579 {
580 struct rtl_priv *rtlpriv = rtl_priv(hw);
581 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
582 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
583 u8 sleep_intv;
584
585 if (!rtlpriv->psc.sw_ps_enabled)
586 return;
587
588 if ((rtlpriv->sec.being_setkey) ||
589 (mac->opmode == NL80211_IFTYPE_ADHOC))
590 return;
591
592 /*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */
593 if ((mac->link_state != MAC80211_LINKED) || (mac->cnt_after_linked < 5))
594 return;
595
596 if (rtlpriv->link_info.busytraffic)
597 return;
598
599 spin_lock(&rtlpriv->locks.rf_ps_lock);
600 if (rtlpriv->psc.rfchange_inprogress) {
601 spin_unlock(&rtlpriv->locks.rf_ps_lock);
602 return;
603 }
604 spin_unlock(&rtlpriv->locks.rf_ps_lock);
605
606 mutex_lock(&rtlpriv->locks.lps_mutex);
607 rtl_ps_set_rf_state(hw, ERFSLEEP, RF_CHANGE_BY_PS);
608 mutex_unlock(&rtlpriv->locks.lps_mutex);
609
610 if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM &&
611 !RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
612 rtlpriv->intf_ops->enable_aspm(hw);
613 RT_SET_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
614 }
615
616 /* here is power save alg, when this beacon is DTIM
617 * we will set sleep time to dtim_period * n;
618 * when this beacon is not DTIM, we will set sleep
619 * time to sleep_intv = rtlpriv->psc.dtim_counter or
620 * MAX_SW_LPS_SLEEP_INTV(default set to 5) */
621
622 if (rtlpriv->psc.dtim_counter == 0) {
623 if (hw->conf.ps_dtim_period == 1)
624 sleep_intv = hw->conf.ps_dtim_period * 2;
625 else
626 sleep_intv = hw->conf.ps_dtim_period;
627 } else {
628 sleep_intv = rtlpriv->psc.dtim_counter;
629 }
630
631 if (sleep_intv > MAX_SW_LPS_SLEEP_INTV)
632 sleep_intv = MAX_SW_LPS_SLEEP_INTV;
633
634 /* this print should always be dtim_conter = 0 &
635 * sleep = dtim_period, that meaons, we should
636 * awake before every dtim */
637 RT_TRACE(rtlpriv, COMP_POWER, DBG_DMESG,
638 "dtim_counter:%x will sleep :%d beacon_intv\n",
639 rtlpriv->psc.dtim_counter, sleep_intv);
640
641 /* we tested that 40ms is enough for sw & hw sw delay */
642 queue_delayed_work(rtlpriv->works.rtl_wq, &rtlpriv->works.ps_rfon_wq,
643 MSECS(sleep_intv * mac->vif->bss_conf.beacon_int - 40));
644 }
645
646 void rtl_lps_change_work_callback(struct work_struct *work)
647 {
648 struct rtl_works *rtlworks =
649 container_of(work, struct rtl_works, lps_change_work);
650 struct ieee80211_hw *hw = rtlworks->hw;
651 struct rtl_priv *rtlpriv = rtl_priv(hw);
652
653 if (rtlpriv->enter_ps)
654 rtl_lps_enter_core(hw);
655 else
656 rtl_lps_leave_core(hw);
657 }
658 EXPORT_SYMBOL_GPL(rtl_lps_change_work_callback);
659
660 void rtl_lps_enter(struct ieee80211_hw *hw)
661 {
662 struct rtl_priv *rtlpriv = rtl_priv(hw);
663
664 if (!in_interrupt())
665 return rtl_lps_enter_core(hw);
666 rtlpriv->enter_ps = true;
667 schedule_work(&rtlpriv->works.lps_change_work);
668 }
669 EXPORT_SYMBOL_GPL(rtl_lps_enter);
670
671 void rtl_lps_leave(struct ieee80211_hw *hw)
672 {
673 struct rtl_priv *rtlpriv = rtl_priv(hw);
674
675 if (!in_interrupt())
676 return rtl_lps_leave_core(hw);
677 rtlpriv->enter_ps = false;
678 schedule_work(&rtlpriv->works.lps_change_work);
679 }
680 EXPORT_SYMBOL_GPL(rtl_lps_leave);
681
682 void rtl_swlps_wq_callback(void *data)
683 {
684 struct rtl_works *rtlworks = container_of_dwork_rtl(data,
685 struct rtl_works,
686 ps_work);
687 struct ieee80211_hw *hw = rtlworks->hw;
688 struct rtl_priv *rtlpriv = rtl_priv(hw);
689 bool ps = false;
690
691 ps = (hw->conf.flags & IEEE80211_CONF_PS);
692
693 /* we can sleep after ps null send ok */
694 if (rtlpriv->psc.state_inap) {
695 rtl_swlps_rf_sleep(hw);
696
697 if (rtlpriv->psc.state && !ps) {
698 rtlpriv->psc.sleep_ms = jiffies_to_msecs(jiffies -
699 rtlpriv->psc.last_action);
700 }
701
702 if (ps)
703 rtlpriv->psc.last_slept = jiffies;
704
705 rtlpriv->psc.last_action = jiffies;
706 rtlpriv->psc.state = ps;
707 }
708 }
709
710 static void rtl_p2p_noa_ie(struct ieee80211_hw *hw, void *data,
711 unsigned int len)
712 {
713 struct rtl_priv *rtlpriv = rtl_priv(hw);
714 struct ieee80211_mgmt *mgmt = data;
715 struct rtl_p2p_ps_info *p2pinfo = &(rtlpriv->psc.p2p_ps_info);
716 u8 *pos, *end, *ie;
717 u16 noa_len;
718 static u8 p2p_oui_ie_type[4] = {0x50, 0x6f, 0x9a, 0x09};
719 u8 noa_num, index , i, noa_index = 0;
720 bool find_p2p_ie = false , find_p2p_ps_ie = false;
721
722 pos = (u8 *)mgmt->u.beacon.variable;
723 end = data + len;
724 ie = NULL;
725
726 while (pos + 1 < end) {
727 if (pos + 2 + pos[1] > end)
728 return;
729
730 if (pos[0] == 221 && pos[1] > 4) {
731 if (memcmp(&pos[2], p2p_oui_ie_type, 4) == 0) {
732 ie = pos + 2+4;
733 break;
734 }
735 }
736 pos += 2 + pos[1];
737 }
738
739 if (ie == NULL)
740 return;
741 find_p2p_ie = true;
742 /*to find noa ie*/
743 while (ie + 1 < end) {
744 noa_len = READEF2BYTE((__le16 *)&ie[1]);
745 if (ie + 3 + ie[1] > end)
746 return;
747
748 if (ie[0] == 12) {
749 find_p2p_ps_ie = true;
750 if ((noa_len - 2) % 13 != 0) {
751 RT_TRACE(rtlpriv, COMP_INIT, DBG_LOUD,
752 "P2P notice of absence: invalid length.%d\n",
753 noa_len);
754 return;
755 } else {
756 noa_num = (noa_len - 2) / 13;
757 if (noa_num > P2P_MAX_NOA_NUM)
758 noa_num = P2P_MAX_NOA_NUM;
759
760 }
761 noa_index = ie[3];
762 if (rtlpriv->psc.p2p_ps_info.p2p_ps_mode ==
763 P2P_PS_NONE || noa_index != p2pinfo->noa_index) {
764 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD,
765 "update NOA ie.\n");
766 p2pinfo->noa_index = noa_index;
767 p2pinfo->opp_ps = (ie[4] >> 7);
768 p2pinfo->ctwindow = ie[4] & 0x7F;
769 p2pinfo->noa_num = noa_num;
770 index = 5;
771 for (i = 0; i < noa_num; i++) {
772 p2pinfo->noa_count_type[i] =
773 READEF1BYTE(ie+index);
774 index += 1;
775 p2pinfo->noa_duration[i] =
776 READEF4BYTE((__le32 *)ie+index);
777 index += 4;
778 p2pinfo->noa_interval[i] =
779 READEF4BYTE((__le32 *)ie+index);
780 index += 4;
781 p2pinfo->noa_start_time[i] =
782 READEF4BYTE((__le32 *)ie+index);
783 index += 4;
784 }
785
786 if (p2pinfo->opp_ps == 1) {
787 p2pinfo->p2p_ps_mode = P2P_PS_CTWINDOW;
788 /* Driver should wait LPS entering
789 * CTWindow
790 */
791 if (rtlpriv->psc.fw_current_inpsmode)
792 rtl_p2p_ps_cmd(hw,
793 P2P_PS_ENABLE);
794 } else if (p2pinfo->noa_num > 0) {
795 p2pinfo->p2p_ps_mode = P2P_PS_NOA;
796 rtl_p2p_ps_cmd(hw, P2P_PS_ENABLE);
797 } else if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
798 rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE);
799 }
800 }
801 break;
802 }
803 ie += 3 + noa_len;
804 }
805
806 if (find_p2p_ie == true) {
807 if ((p2pinfo->p2p_ps_mode > P2P_PS_NONE) &&
808 (find_p2p_ps_ie == false))
809 rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE);
810 }
811 }
812
813 static void rtl_p2p_action_ie(struct ieee80211_hw *hw, void *data,
814 unsigned int len)
815 {
816 struct rtl_priv *rtlpriv = rtl_priv(hw);
817 struct ieee80211_mgmt *mgmt = data;
818 struct rtl_p2p_ps_info *p2pinfo = &(rtlpriv->psc.p2p_ps_info);
819 u8 noa_num, index , i , noa_index = 0;
820 u8 *pos, *end, *ie;
821 u16 noa_len;
822 static u8 p2p_oui_ie_type[4] = {0x50, 0x6f, 0x9a, 0x09};
823
824 pos = (u8 *)&mgmt->u.action.category;
825 end = data + len;
826 ie = NULL;
827
828 if (pos[0] == 0x7f) {
829 if (memcmp(&pos[1], p2p_oui_ie_type, 4) == 0)
830 ie = pos + 3+4;
831 }
832
833 if (ie == NULL)
834 return;
835
836 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, "action frame find P2P IE.\n");
837 /*to find noa ie*/
838 while (ie + 1 < end) {
839 noa_len = READEF2BYTE((__le16 *)&ie[1]);
840 if (ie + 3 + ie[1] > end)
841 return;
842
843 if (ie[0] == 12) {
844 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, "find NOA IE.\n");
845 RT_PRINT_DATA(rtlpriv, COMP_FW, DBG_LOUD, "noa ie ",
846 ie, noa_len);
847 if ((noa_len - 2) % 13 != 0) {
848 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD,
849 "P2P notice of absence: invalid length.%d\n",
850 noa_len);
851 return;
852 } else {
853 noa_num = (noa_len - 2) / 13;
854 if (noa_num > P2P_MAX_NOA_NUM)
855 noa_num = P2P_MAX_NOA_NUM;
856
857 }
858 noa_index = ie[3];
859 if (rtlpriv->psc.p2p_ps_info.p2p_ps_mode ==
860 P2P_PS_NONE || noa_index != p2pinfo->noa_index) {
861 p2pinfo->noa_index = noa_index;
862 p2pinfo->opp_ps = (ie[4] >> 7);
863 p2pinfo->ctwindow = ie[4] & 0x7F;
864 p2pinfo->noa_num = noa_num;
865 index = 5;
866 for (i = 0; i < noa_num; i++) {
867 p2pinfo->noa_count_type[i] =
868 READEF1BYTE(ie+index);
869 index += 1;
870 p2pinfo->noa_duration[i] =
871 READEF4BYTE((__le32 *)ie+index);
872 index += 4;
873 p2pinfo->noa_interval[i] =
874 READEF4BYTE((__le32 *)ie+index);
875 index += 4;
876 p2pinfo->noa_start_time[i] =
877 READEF4BYTE((__le32 *)ie+index);
878 index += 4;
879 }
880
881 if (p2pinfo->opp_ps == 1) {
882 p2pinfo->p2p_ps_mode = P2P_PS_CTWINDOW;
883 /* Driver should wait LPS entering
884 * CTWindow
885 */
886 if (rtlpriv->psc.fw_current_inpsmode)
887 rtl_p2p_ps_cmd(hw,
888 P2P_PS_ENABLE);
889 } else if (p2pinfo->noa_num > 0) {
890 p2pinfo->p2p_ps_mode = P2P_PS_NOA;
891 rtl_p2p_ps_cmd(hw, P2P_PS_ENABLE);
892 } else if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
893 rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE);
894 }
895 }
896 break;
897 }
898 ie += 3 + noa_len;
899 }
900 }
901
902 void rtl_p2p_ps_cmd(struct ieee80211_hw *hw , u8 p2p_ps_state)
903 {
904 struct rtl_priv *rtlpriv = rtl_priv(hw);
905 struct rtl_ps_ctl *rtlps = rtl_psc(rtl_priv(hw));
906 struct rtl_p2p_ps_info *p2pinfo = &(rtlpriv->psc.p2p_ps_info);
907
908 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, " p2p state %x\n" , p2p_ps_state);
909 switch (p2p_ps_state) {
910 case P2P_PS_DISABLE:
911 p2pinfo->p2p_ps_state = p2p_ps_state;
912 rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_H2C_FW_P2P_PS_OFFLOAD,
913 &p2p_ps_state);
914 p2pinfo->noa_index = 0;
915 p2pinfo->ctwindow = 0;
916 p2pinfo->opp_ps = 0;
917 p2pinfo->noa_num = 0;
918 p2pinfo->p2p_ps_mode = P2P_PS_NONE;
919 if (rtlps->fw_current_inpsmode) {
920 if (rtlps->smart_ps == 0) {
921 rtlps->smart_ps = 2;
922 rtlpriv->cfg->ops->set_hw_reg(hw,
923 HW_VAR_H2C_FW_PWRMODE,
924 &rtlps->pwr_mode);
925 }
926
927 }
928 break;
929 case P2P_PS_ENABLE:
930 if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
931 p2pinfo->p2p_ps_state = p2p_ps_state;
932
933 if (p2pinfo->ctwindow > 0) {
934 if (rtlps->smart_ps != 0) {
935 rtlps->smart_ps = 0;
936 rtlpriv->cfg->ops->set_hw_reg(hw,
937 HW_VAR_H2C_FW_PWRMODE,
938 &rtlps->pwr_mode);
939 }
940 }
941 rtlpriv->cfg->ops->set_hw_reg(hw,
942 HW_VAR_H2C_FW_P2P_PS_OFFLOAD,
943 &p2p_ps_state);
944
945 }
946 break;
947 case P2P_PS_SCAN:
948 case P2P_PS_SCAN_DONE:
949 case P2P_PS_ALLSTASLEEP:
950 if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
951 p2pinfo->p2p_ps_state = p2p_ps_state;
952 rtlpriv->cfg->ops->set_hw_reg(hw,
953 HW_VAR_H2C_FW_P2P_PS_OFFLOAD,
954 &p2p_ps_state);
955 }
956 break;
957 default:
958 break;
959 }
960 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD,
961 "ctwindow %x oppps %x\n",
962 p2pinfo->ctwindow , p2pinfo->opp_ps);
963 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD,
964 "count %x duration %x index %x interval %x start time %x noa num %x\n",
965 p2pinfo->noa_count_type[0],
966 p2pinfo->noa_duration[0],
967 p2pinfo->noa_index,
968 p2pinfo->noa_interval[0],
969 p2pinfo->noa_start_time[0],
970 p2pinfo->noa_num);
971 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, "end\n");
972 }
973
974 void rtl_p2p_info(struct ieee80211_hw *hw, void *data, unsigned int len)
975 {
976 struct rtl_priv *rtlpriv = rtl_priv(hw);
977 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
978 struct ieee80211_hdr *hdr = data;
979
980 if (!mac->p2p)
981 return;
982 if (mac->link_state != MAC80211_LINKED)
983 return;
984 /* min. beacon length + FCS_LEN */
985 if (len <= 40 + FCS_LEN)
986 return;
987
988 /* and only beacons from the associated BSSID, please */
989 if (!ether_addr_equal_64bits(hdr->addr3, rtlpriv->mac80211.bssid))
990 return;
991
992 /* check if this really is a beacon */
993 if (!(ieee80211_is_beacon(hdr->frame_control) ||
994 ieee80211_is_probe_resp(hdr->frame_control) ||
995 ieee80211_is_action(hdr->frame_control)))
996 return;
997
998 if (ieee80211_is_action(hdr->frame_control))
999 rtl_p2p_action_ie(hw , data , len - FCS_LEN);
1000 else
1001 rtl_p2p_noa_ie(hw , data , len - FCS_LEN);
1002 }
1003 EXPORT_SYMBOL_GPL(rtl_p2p_info);
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