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[RAMEN9610-21029]rtlwifi: Fix potential overflow on P2P code
[GitHub/MotorolaMobilityLLC/kernel-slsi.git] / drivers / net / wireless / realtek / 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 * The full GNU General Public License is included in this distribution in the
15 * file called LICENSE.
16 *
17 * Contact Information:
18 * wlanfae <wlanfae@realtek.com>
19 * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
20 * Hsinchu 300, Taiwan.
21 *
22 * Larry Finger <Larry.Finger@lwfinger.net>
23 *
24 *****************************************************************************/
25
26 #include "wifi.h"
27 #include "base.h"
28 #include "ps.h"
29 #include <linux/export.h>
30 #include "btcoexist/rtl_btc.h"
31
32 bool rtl_ps_enable_nic(struct ieee80211_hw *hw)
33 {
34 struct rtl_priv *rtlpriv = rtl_priv(hw);
35 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
36 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
37 struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
38
39 /*<1> reset trx ring */
40 if (rtlhal->interface == INTF_PCI)
41 rtlpriv->intf_ops->reset_trx_ring(hw);
42
43 if (is_hal_stop(rtlhal))
44 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
45 "Driver is already down!\n");
46
47 /*<2> Enable Adapter */
48 if (rtlpriv->cfg->ops->hw_init(hw))
49 return false;
50 rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_RETRY_LIMIT,
51 &rtlmac->retry_long);
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, true);
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 static 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 enum rf_pwrstate rtstate;
89 bool actionallowed = false;
90 u16 rfwait_cnt = 0;
91
92 /*Only one thread can change
93 *the RF state at one time, and others
94 *should wait to be executed.
95 */
96 while (true) {
97 spin_lock(&rtlpriv->locks.rf_ps_lock);
98 if (ppsc->rfchange_inprogress) {
99 spin_unlock(&rtlpriv->locks.rf_ps_lock);
100
101 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
102 "RF Change in progress! Wait to set..state_toset(%d).\n",
103 state_toset);
104
105 /* Set RF after the previous action is done. */
106 while (ppsc->rfchange_inprogress) {
107 rfwait_cnt++;
108 mdelay(1);
109 /*Wait too long, return false to avoid
110 *to be stuck here.
111 */
112 if (rfwait_cnt > 100)
113 return false;
114 }
115 } else {
116 ppsc->rfchange_inprogress = true;
117 spin_unlock(&rtlpriv->locks.rf_ps_lock);
118 break;
119 }
120 }
121
122 rtstate = ppsc->rfpwr_state;
123
124 switch (state_toset) {
125 case ERFON:
126 ppsc->rfoff_reason &= (~changesource);
127
128 if ((changesource == RF_CHANGE_BY_HW) &&
129 (ppsc->hwradiooff)) {
130 ppsc->hwradiooff = false;
131 }
132
133 if (!ppsc->rfoff_reason) {
134 ppsc->rfoff_reason = 0;
135 actionallowed = true;
136 }
137
138 break;
139
140 case ERFOFF:
141
142 if ((changesource == RF_CHANGE_BY_HW) && !ppsc->hwradiooff) {
143 ppsc->hwradiooff = true;
144 }
145
146 ppsc->rfoff_reason |= changesource;
147 actionallowed = true;
148 break;
149
150 case ERFSLEEP:
151 ppsc->rfoff_reason |= changesource;
152 actionallowed = true;
153 break;
154
155 default:
156 pr_err("switch case %#x not processed\n", state_toset);
157 break;
158 }
159
160 if (actionallowed)
161 rtlpriv->cfg->ops->set_rf_power_state(hw, state_toset);
162
163 spin_lock(&rtlpriv->locks.rf_ps_lock);
164 ppsc->rfchange_inprogress = false;
165 spin_unlock(&rtlpriv->locks.rf_ps_lock);
166
167 return actionallowed;
168 }
169
170 static void _rtl_ps_inactive_ps(struct ieee80211_hw *hw)
171 {
172 struct rtl_priv *rtlpriv = rtl_priv(hw);
173 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
174 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
175
176 ppsc->swrf_processing = true;
177
178 if (ppsc->inactive_pwrstate == ERFON &&
179 rtlhal->interface == INTF_PCI) {
180 if ((ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM) &&
181 RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM) &&
182 rtlhal->interface == INTF_PCI) {
183 rtlpriv->intf_ops->disable_aspm(hw);
184 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
185 }
186 }
187
188 rtl_ps_set_rf_state(hw, ppsc->inactive_pwrstate,
189 RF_CHANGE_BY_IPS);
190
191 if (ppsc->inactive_pwrstate == ERFOFF &&
192 rtlhal->interface == INTF_PCI) {
193 if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM &&
194 !RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
195 rtlpriv->intf_ops->enable_aspm(hw);
196 RT_SET_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
197 }
198 }
199
200 ppsc->swrf_processing = false;
201 }
202
203 void rtl_ips_nic_off_wq_callback(void *data)
204 {
205 struct rtl_works *rtlworks =
206 container_of_dwork_rtl(data, struct rtl_works, ips_nic_off_wq);
207 struct ieee80211_hw *hw = rtlworks->hw;
208 struct rtl_priv *rtlpriv = rtl_priv(hw);
209 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
210 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
211 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
212 enum rf_pwrstate rtstate;
213
214 if (mac->opmode != NL80211_IFTYPE_STATION) {
215 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
216 "not station return\n");
217 return;
218 }
219
220 if (mac->p2p_in_use)
221 return;
222
223 if (mac->link_state > MAC80211_NOLINK)
224 return;
225
226 if (is_hal_stop(rtlhal))
227 return;
228
229 if (rtlpriv->sec.being_setkey)
230 return;
231
232 if (rtlpriv->cfg->ops->bt_coex_off_before_lps)
233 rtlpriv->cfg->ops->bt_coex_off_before_lps(hw);
234
235 if (ppsc->inactiveps) {
236 rtstate = ppsc->rfpwr_state;
237
238 /*
239 *Do not enter IPS in the following conditions:
240 *(1) RF is already OFF or Sleep
241 *(2) swrf_processing (indicates the IPS is still under going)
242 *(3) Connectted (only disconnected can trigger IPS)
243 *(4) IBSS (send Beacon)
244 *(5) AP mode (send Beacon)
245 *(6) monitor mode (rcv packet)
246 */
247
248 if (rtstate == ERFON &&
249 !ppsc->swrf_processing &&
250 (mac->link_state == MAC80211_NOLINK) &&
251 !mac->act_scanning) {
252 RT_TRACE(rtlpriv, COMP_RF, DBG_TRACE,
253 "IPSEnter(): Turn off RF\n");
254
255 ppsc->inactive_pwrstate = ERFOFF;
256 ppsc->in_powersavemode = true;
257
258 /* call before RF off */
259 if (rtlpriv->cfg->ops->get_btc_status())
260 rtlpriv->btcoexist.btc_ops->btc_ips_notify(rtlpriv,
261 ppsc->inactive_pwrstate);
262
263 /*rtl_pci_reset_trx_ring(hw); */
264 _rtl_ps_inactive_ps(hw);
265 }
266 }
267 }
268
269 void rtl_ips_nic_off(struct ieee80211_hw *hw)
270 {
271 struct rtl_priv *rtlpriv = rtl_priv(hw);
272
273 /* because when link with ap, mac80211 will ask us
274 * to disable nic quickly after scan before linking,
275 * this will cause link failed, so we delay 100ms here
276 */
277 queue_delayed_work(rtlpriv->works.rtl_wq,
278 &rtlpriv->works.ips_nic_off_wq, MSECS(100));
279 }
280
281 /* NOTICE: any opmode should exc nic_on, or disable without
282 * nic_on may something wrong, like adhoc TP
283 */
284 void rtl_ips_nic_on(struct ieee80211_hw *hw)
285 {
286 struct rtl_priv *rtlpriv = rtl_priv(hw);
287 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
288 enum rf_pwrstate rtstate;
289
290 cancel_delayed_work_sync(&rtlpriv->works.ips_nic_off_wq);
291
292 spin_lock(&rtlpriv->locks.ips_lock);
293 if (ppsc->inactiveps) {
294 rtstate = ppsc->rfpwr_state;
295
296 if (rtstate != ERFON &&
297 !ppsc->swrf_processing &&
298 ppsc->rfoff_reason <= RF_CHANGE_BY_IPS) {
299
300 ppsc->inactive_pwrstate = ERFON;
301 ppsc->in_powersavemode = false;
302 _rtl_ps_inactive_ps(hw);
303 /* call after RF on */
304 if (rtlpriv->cfg->ops->get_btc_status())
305 rtlpriv->btcoexist.btc_ops->btc_ips_notify(rtlpriv,
306 ppsc->inactive_pwrstate);
307 }
308 }
309 spin_unlock(&rtlpriv->locks.ips_lock);
310 }
311 EXPORT_SYMBOL_GPL(rtl_ips_nic_on);
312
313 /*for FW LPS*/
314
315 /*
316 *Determine if we can set Fw into PS mode
317 *in current condition.Return TRUE if it
318 *can enter PS mode.
319 */
320 static bool rtl_get_fwlps_doze(struct ieee80211_hw *hw)
321 {
322 struct rtl_priv *rtlpriv = rtl_priv(hw);
323 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
324 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
325 u32 ps_timediff;
326
327 ps_timediff = jiffies_to_msecs(jiffies -
328 ppsc->last_delaylps_stamp_jiffies);
329
330 if (ps_timediff < 2000) {
331 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
332 "Delay enter Fw LPS for DHCP, ARP, or EAPOL exchanging state\n");
333 return false;
334 }
335
336 if (mac->link_state != MAC80211_LINKED)
337 return false;
338
339 if (mac->opmode == NL80211_IFTYPE_ADHOC)
340 return false;
341
342 return true;
343 }
344
345 /* Change current and default preamble mode.*/
346 void rtl_lps_set_psmode(struct ieee80211_hw *hw, u8 rt_psmode)
347 {
348 struct rtl_priv *rtlpriv = rtl_priv(hw);
349 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
350 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
351 bool enter_fwlps;
352
353 if (mac->opmode == NL80211_IFTYPE_ADHOC)
354 return;
355
356 if (mac->link_state != MAC80211_LINKED)
357 return;
358
359 if (ppsc->dot11_psmode == rt_psmode && rt_psmode == EACTIVE)
360 return;
361
362 /* Update power save mode configured. */
363 ppsc->dot11_psmode = rt_psmode;
364
365 /*
366 *<FW control LPS>
367 *1. Enter PS mode
368 * Set RPWM to Fw to turn RF off and send H2C fw_pwrmode
369 * cmd to set Fw into PS mode.
370 *2. Leave PS mode
371 * Send H2C fw_pwrmode cmd to Fw to set Fw into Active
372 * mode and set RPWM to turn RF on.
373 */
374
375 if ((ppsc->fwctrl_lps) && ppsc->report_linked) {
376 if (ppsc->dot11_psmode == EACTIVE) {
377 RT_TRACE(rtlpriv, COMP_RF, DBG_DMESG,
378 "FW LPS leave ps_mode:%x\n",
379 FW_PS_ACTIVE_MODE);
380 enter_fwlps = false;
381 ppsc->pwr_mode = FW_PS_ACTIVE_MODE;
382 ppsc->smart_ps = 0;
383 rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_FW_LPS_ACTION,
384 (u8 *)(&enter_fwlps));
385 if (ppsc->p2p_ps_info.opp_ps)
386 rtl_p2p_ps_cmd(hw , P2P_PS_ENABLE);
387
388 if (rtlpriv->cfg->ops->get_btc_status())
389 rtlpriv->btcoexist.btc_ops->btc_lps_notify(rtlpriv, rt_psmode);
390 } else {
391 if (rtl_get_fwlps_doze(hw)) {
392 RT_TRACE(rtlpriv, COMP_RF, DBG_DMESG,
393 "FW LPS enter ps_mode:%x\n",
394 ppsc->fwctrl_psmode);
395 if (rtlpriv->cfg->ops->get_btc_status())
396 rtlpriv->btcoexist.btc_ops->btc_lps_notify(rtlpriv, rt_psmode);
397 enter_fwlps = true;
398 ppsc->pwr_mode = ppsc->fwctrl_psmode;
399 ppsc->smart_ps = 2;
400 rtlpriv->cfg->ops->set_hw_reg(hw,
401 HW_VAR_FW_LPS_ACTION,
402 (u8 *)(&enter_fwlps));
403
404 } else {
405 /* Reset the power save related parameters. */
406 ppsc->dot11_psmode = EACTIVE;
407 }
408 }
409 }
410 }
411
412 /* Interrupt safe routine to enter the leisure power save mode.*/
413 static void rtl_lps_enter_core(struct ieee80211_hw *hw)
414 {
415 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
416 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
417 struct rtl_priv *rtlpriv = rtl_priv(hw);
418 unsigned long flag;
419
420 if (!ppsc->fwctrl_lps)
421 return;
422
423 if (rtlpriv->sec.being_setkey)
424 return;
425
426 if (rtlpriv->link_info.busytraffic)
427 return;
428
429 /*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */
430 if (mac->cnt_after_linked < 5)
431 return;
432
433 if (mac->opmode == NL80211_IFTYPE_ADHOC)
434 return;
435
436 if (mac->link_state != MAC80211_LINKED)
437 return;
438
439 spin_lock_irqsave(&rtlpriv->locks.lps_lock, flag);
440
441 /* Don't need to check (ppsc->dot11_psmode == EACTIVE), because
442 * bt_ccoexist may ask to enter lps.
443 * In normal case, this constraint move to rtl_lps_set_psmode().
444 */
445 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
446 "Enter 802.11 power save mode...\n");
447 rtl_lps_set_psmode(hw, EAUTOPS);
448
449 spin_unlock_irqrestore(&rtlpriv->locks.lps_lock, flag);
450 }
451
452 /* Interrupt safe routine to leave the leisure power save mode.*/
453 static void rtl_lps_leave_core(struct ieee80211_hw *hw)
454 {
455 struct rtl_priv *rtlpriv = rtl_priv(hw);
456 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
457 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
458 unsigned long flag;
459
460 spin_lock_irqsave(&rtlpriv->locks.lps_lock, flag);
461
462 if (ppsc->fwctrl_lps) {
463 if (ppsc->dot11_psmode != EACTIVE) {
464
465 /*FIX ME */
466 /*rtlpriv->cfg->ops->enable_interrupt(hw); */
467
468 if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM &&
469 RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM) &&
470 rtlhal->interface == INTF_PCI) {
471 rtlpriv->intf_ops->disable_aspm(hw);
472 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
473 }
474
475 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
476 "Busy Traffic,Leave 802.11 power save..\n");
477
478 rtl_lps_set_psmode(hw, EACTIVE);
479 }
480 }
481 spin_unlock_irqrestore(&rtlpriv->locks.lps_lock, flag);
482 }
483
484 /* For sw LPS*/
485 void rtl_swlps_beacon(struct ieee80211_hw *hw, void *data, unsigned int len)
486 {
487 struct rtl_priv *rtlpriv = rtl_priv(hw);
488 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
489 struct ieee80211_hdr *hdr = data;
490 struct ieee80211_tim_ie *tim_ie;
491 u8 *tim;
492 u8 tim_len;
493 bool u_buffed;
494 bool m_buffed;
495
496 if (mac->opmode != NL80211_IFTYPE_STATION)
497 return;
498
499 if (!rtlpriv->psc.swctrl_lps)
500 return;
501
502 if (rtlpriv->mac80211.link_state != MAC80211_LINKED)
503 return;
504
505 if (!rtlpriv->psc.sw_ps_enabled)
506 return;
507
508 if (rtlpriv->psc.fwctrl_lps)
509 return;
510
511 if (likely(!(hw->conf.flags & IEEE80211_CONF_PS)))
512 return;
513
514 /* check if this really is a beacon */
515 if (!ieee80211_is_beacon(hdr->frame_control))
516 return;
517
518 /* min. beacon length + FCS_LEN */
519 if (len <= 40 + FCS_LEN)
520 return;
521
522 /* and only beacons from the associated BSSID, please */
523 if (!ether_addr_equal_64bits(hdr->addr3, rtlpriv->mac80211.bssid))
524 return;
525
526 rtlpriv->psc.last_beacon = jiffies;
527
528 tim = rtl_find_ie(data, len - FCS_LEN, WLAN_EID_TIM);
529 if (!tim)
530 return;
531
532 if (tim[1] < sizeof(*tim_ie))
533 return;
534
535 tim_len = tim[1];
536 tim_ie = (struct ieee80211_tim_ie *) &tim[2];
537
538 if (!WARN_ON_ONCE(!hw->conf.ps_dtim_period))
539 rtlpriv->psc.dtim_counter = tim_ie->dtim_count;
540
541 /* Check whenever the PHY can be turned off again. */
542
543 /* 1. What about buffered unicast traffic for our AID? */
544 u_buffed = ieee80211_check_tim(tim_ie, tim_len,
545 rtlpriv->mac80211.assoc_id);
546
547 /* 2. Maybe the AP wants to send multicast/broadcast data? */
548 m_buffed = tim_ie->bitmap_ctrl & 0x01;
549 rtlpriv->psc.multi_buffered = m_buffed;
550
551 /* unicast will process by mac80211 through
552 * set ~IEEE80211_CONF_PS, So we just check
553 * multicast frames here */
554 if (!m_buffed) {
555 /* back to low-power land. and delay is
556 * prevent null power save frame tx fail */
557 queue_delayed_work(rtlpriv->works.rtl_wq,
558 &rtlpriv->works.ps_work, MSECS(5));
559 } else {
560 RT_TRACE(rtlpriv, COMP_POWER, DBG_DMESG,
561 "u_bufferd: %x, m_buffered: %x\n", u_buffed, m_buffed);
562 }
563 }
564 EXPORT_SYMBOL_GPL(rtl_swlps_beacon);
565
566 void rtl_swlps_rf_awake(struct ieee80211_hw *hw)
567 {
568 struct rtl_priv *rtlpriv = rtl_priv(hw);
569 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
570 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
571 unsigned long flag;
572
573 if (!rtlpriv->psc.swctrl_lps)
574 return;
575 if (mac->link_state != MAC80211_LINKED)
576 return;
577
578 if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM &&
579 RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
580 rtlpriv->intf_ops->disable_aspm(hw);
581 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
582 }
583
584 spin_lock_irqsave(&rtlpriv->locks.lps_lock, flag);
585 rtl_ps_set_rf_state(hw, ERFON, RF_CHANGE_BY_PS);
586 spin_unlock_irqrestore(&rtlpriv->locks.lps_lock, flag);
587 }
588
589 void rtl_swlps_rfon_wq_callback(void *data)
590 {
591 struct rtl_works *rtlworks =
592 container_of_dwork_rtl(data, struct rtl_works, ps_rfon_wq);
593 struct ieee80211_hw *hw = rtlworks->hw;
594
595 rtl_swlps_rf_awake(hw);
596 }
597
598 void rtl_swlps_rf_sleep(struct ieee80211_hw *hw)
599 {
600 struct rtl_priv *rtlpriv = rtl_priv(hw);
601 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
602 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
603 unsigned long flag;
604 u8 sleep_intv;
605
606 if (!rtlpriv->psc.sw_ps_enabled)
607 return;
608
609 if ((rtlpriv->sec.being_setkey) ||
610 (mac->opmode == NL80211_IFTYPE_ADHOC))
611 return;
612
613 /*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */
614 if ((mac->link_state != MAC80211_LINKED) || (mac->cnt_after_linked < 5))
615 return;
616
617 if (rtlpriv->link_info.busytraffic)
618 return;
619
620 spin_lock(&rtlpriv->locks.rf_ps_lock);
621 if (rtlpriv->psc.rfchange_inprogress) {
622 spin_unlock(&rtlpriv->locks.rf_ps_lock);
623 return;
624 }
625 spin_unlock(&rtlpriv->locks.rf_ps_lock);
626
627 spin_lock_irqsave(&rtlpriv->locks.lps_lock, flag);
628 rtl_ps_set_rf_state(hw, ERFSLEEP, RF_CHANGE_BY_PS);
629 spin_unlock_irqrestore(&rtlpriv->locks.lps_lock, flag);
630
631 if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM &&
632 !RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
633 rtlpriv->intf_ops->enable_aspm(hw);
634 RT_SET_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
635 }
636
637 /* here is power save alg, when this beacon is DTIM
638 * we will set sleep time to dtim_period * n;
639 * when this beacon is not DTIM, we will set sleep
640 * time to sleep_intv = rtlpriv->psc.dtim_counter or
641 * MAX_SW_LPS_SLEEP_INTV(default set to 5) */
642
643 if (rtlpriv->psc.dtim_counter == 0) {
644 if (hw->conf.ps_dtim_period == 1)
645 sleep_intv = hw->conf.ps_dtim_period * 2;
646 else
647 sleep_intv = hw->conf.ps_dtim_period;
648 } else {
649 sleep_intv = rtlpriv->psc.dtim_counter;
650 }
651
652 if (sleep_intv > MAX_SW_LPS_SLEEP_INTV)
653 sleep_intv = MAX_SW_LPS_SLEEP_INTV;
654
655 /* this print should always be dtim_conter = 0 &
656 * sleep = dtim_period, that meaons, we should
657 * awake before every dtim */
658 RT_TRACE(rtlpriv, COMP_POWER, DBG_DMESG,
659 "dtim_counter:%x will sleep :%d beacon_intv\n",
660 rtlpriv->psc.dtim_counter, sleep_intv);
661
662 /* we tested that 40ms is enough for sw & hw sw delay */
663 queue_delayed_work(rtlpriv->works.rtl_wq, &rtlpriv->works.ps_rfon_wq,
664 MSECS(sleep_intv * mac->vif->bss_conf.beacon_int - 40));
665 }
666
667 void rtl_lps_change_work_callback(struct work_struct *work)
668 {
669 struct rtl_works *rtlworks =
670 container_of(work, struct rtl_works, lps_change_work);
671 struct ieee80211_hw *hw = rtlworks->hw;
672 struct rtl_priv *rtlpriv = rtl_priv(hw);
673
674 if (rtlpriv->enter_ps)
675 rtl_lps_enter_core(hw);
676 else
677 rtl_lps_leave_core(hw);
678 }
679 EXPORT_SYMBOL_GPL(rtl_lps_change_work_callback);
680
681 void rtl_lps_enter(struct ieee80211_hw *hw)
682 {
683 struct rtl_priv *rtlpriv = rtl_priv(hw);
684
685 if (!in_interrupt())
686 return rtl_lps_enter_core(hw);
687 rtlpriv->enter_ps = true;
688 schedule_work(&rtlpriv->works.lps_change_work);
689 }
690 EXPORT_SYMBOL_GPL(rtl_lps_enter);
691
692 void rtl_lps_leave(struct ieee80211_hw *hw)
693 {
694 struct rtl_priv *rtlpriv = rtl_priv(hw);
695
696 if (!in_interrupt())
697 return rtl_lps_leave_core(hw);
698 rtlpriv->enter_ps = false;
699 schedule_work(&rtlpriv->works.lps_change_work);
700 }
701 EXPORT_SYMBOL_GPL(rtl_lps_leave);
702
703 void rtl_swlps_wq_callback(void *data)
704 {
705 struct rtl_works *rtlworks = container_of_dwork_rtl(data,
706 struct rtl_works,
707 ps_work);
708 struct ieee80211_hw *hw = rtlworks->hw;
709 struct rtl_priv *rtlpriv = rtl_priv(hw);
710 bool ps = false;
711
712 ps = (hw->conf.flags & IEEE80211_CONF_PS);
713
714 /* we can sleep after ps null send ok */
715 if (rtlpriv->psc.state_inap) {
716 rtl_swlps_rf_sleep(hw);
717
718 if (rtlpriv->psc.state && !ps) {
719 rtlpriv->psc.sleep_ms = jiffies_to_msecs(jiffies -
720 rtlpriv->psc.last_action);
721 }
722
723 if (ps)
724 rtlpriv->psc.last_slept = jiffies;
725
726 rtlpriv->psc.last_action = jiffies;
727 rtlpriv->psc.state = ps;
728 }
729 }
730
731 static void rtl_p2p_noa_ie(struct ieee80211_hw *hw, void *data,
732 unsigned int len)
733 {
734 struct rtl_priv *rtlpriv = rtl_priv(hw);
735 struct ieee80211_mgmt *mgmt = data;
736 struct rtl_p2p_ps_info *p2pinfo = &(rtlpriv->psc.p2p_ps_info);
737 u8 *pos, *end, *ie;
738 u16 noa_len;
739 static u8 p2p_oui_ie_type[4] = {0x50, 0x6f, 0x9a, 0x09};
740 u8 noa_num, index , i, noa_index = 0;
741 bool find_p2p_ie = false , find_p2p_ps_ie = false;
742 pos = (u8 *)mgmt->u.beacon.variable;
743 end = data + len;
744 ie = NULL;
745
746 while (pos + 1 < end) {
747 if (pos + 2 + pos[1] > end)
748 return;
749
750 if (pos[0] == 221 && pos[1] > 4) {
751 if (memcmp(&pos[2], p2p_oui_ie_type, 4) == 0) {
752 ie = pos + 2+4;
753 break;
754 }
755 }
756 pos += 2 + pos[1];
757 }
758
759 if (ie == NULL)
760 return;
761 find_p2p_ie = true;
762 /*to find noa ie*/
763 while (ie + 1 < end) {
764 noa_len = READEF2BYTE((__le16 *)&ie[1]);
765 if (ie + 3 + ie[1] > end)
766 return;
767
768 if (ie[0] == 12) {
769 find_p2p_ps_ie = true;
770 if ((noa_len - 2) % 13 != 0) {
771 RT_TRACE(rtlpriv, COMP_INIT, DBG_LOUD,
772 "P2P notice of absence: invalid length.%d\n",
773 noa_len);
774 return;
775 } else {
776 noa_num = (noa_len - 2) / 13;
777 if (noa_num > P2P_MAX_NOA_NUM)
778 noa_num = P2P_MAX_NOA_NUM;
779
780 }
781 noa_index = ie[3];
782 if (rtlpriv->psc.p2p_ps_info.p2p_ps_mode ==
783 P2P_PS_NONE || noa_index != p2pinfo->noa_index) {
784 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD,
785 "update NOA ie.\n");
786 p2pinfo->noa_index = noa_index;
787 p2pinfo->opp_ps = (ie[4] >> 7);
788 p2pinfo->ctwindow = ie[4] & 0x7F;
789 p2pinfo->noa_num = noa_num;
790 index = 5;
791 for (i = 0; i < noa_num; i++) {
792 p2pinfo->noa_count_type[i] =
793 READEF1BYTE(ie+index);
794 index += 1;
795 p2pinfo->noa_duration[i] =
796 READEF4BYTE((__le32 *)ie+index);
797 index += 4;
798 p2pinfo->noa_interval[i] =
799 READEF4BYTE((__le32 *)ie+index);
800 index += 4;
801 p2pinfo->noa_start_time[i] =
802 READEF4BYTE((__le32 *)ie+index);
803 index += 4;
804 }
805
806 if (p2pinfo->opp_ps == 1) {
807 p2pinfo->p2p_ps_mode = P2P_PS_CTWINDOW;
808 /* Driver should wait LPS entering
809 * CTWindow
810 */
811 if (rtlpriv->psc.fw_current_inpsmode)
812 rtl_p2p_ps_cmd(hw,
813 P2P_PS_ENABLE);
814 } else if (p2pinfo->noa_num > 0) {
815 p2pinfo->p2p_ps_mode = P2P_PS_NOA;
816 rtl_p2p_ps_cmd(hw, P2P_PS_ENABLE);
817 } else if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
818 rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE);
819 }
820 }
821 break;
822 }
823 ie += 3 + noa_len;
824 }
825
826 if (find_p2p_ie == true) {
827 if ((p2pinfo->p2p_ps_mode > P2P_PS_NONE) &&
828 (find_p2p_ps_ie == false))
829 rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE);
830 }
831 }
832
833 static void rtl_p2p_action_ie(struct ieee80211_hw *hw, void *data,
834 unsigned int len)
835 {
836 struct rtl_priv *rtlpriv = rtl_priv(hw);
837 struct ieee80211_mgmt *mgmt = data;
838 struct rtl_p2p_ps_info *p2pinfo = &(rtlpriv->psc.p2p_ps_info);
839 u8 noa_num, index , i , noa_index = 0;
840 u8 *pos, *end, *ie;
841 u16 noa_len;
842 static u8 p2p_oui_ie_type[4] = {0x50, 0x6f, 0x9a, 0x09};
843
844 pos = (u8 *)&mgmt->u.action.category;
845 end = data + len;
846 ie = NULL;
847
848 if (pos[0] == 0x7f) {
849 if (memcmp(&pos[1], p2p_oui_ie_type, 4) == 0)
850 ie = pos + 3+4;
851 }
852
853 if (ie == NULL)
854 return;
855
856 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, "action frame find P2P IE.\n");
857 /*to find noa ie*/
858 while (ie + 1 < end) {
859 noa_len = READEF2BYTE((__le16 *)&ie[1]);
860 if (ie + 3 + ie[1] > end)
861 return;
862
863 if (ie[0] == 12) {
864 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, "find NOA IE.\n");
865 RT_PRINT_DATA(rtlpriv, COMP_FW, DBG_LOUD, "noa ie ",
866 ie, noa_len);
867 if ((noa_len - 2) % 13 != 0) {
868 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD,
869 "P2P notice of absence: invalid length.%d\n",
870 noa_len);
871 return;
872 } else {
873 noa_num = (noa_len - 2) / 13;
874 if (noa_num > P2P_MAX_NOA_NUM)
875 noa_num = P2P_MAX_NOA_NUM;
876
877 }
878 noa_index = ie[3];
879 if (rtlpriv->psc.p2p_ps_info.p2p_ps_mode ==
880 P2P_PS_NONE || noa_index != p2pinfo->noa_index) {
881 p2pinfo->noa_index = noa_index;
882 p2pinfo->opp_ps = (ie[4] >> 7);
883 p2pinfo->ctwindow = ie[4] & 0x7F;
884 p2pinfo->noa_num = noa_num;
885 index = 5;
886 for (i = 0; i < noa_num; i++) {
887 p2pinfo->noa_count_type[i] =
888 READEF1BYTE(ie+index);
889 index += 1;
890 p2pinfo->noa_duration[i] =
891 READEF4BYTE((__le32 *)ie+index);
892 index += 4;
893 p2pinfo->noa_interval[i] =
894 READEF4BYTE((__le32 *)ie+index);
895 index += 4;
896 p2pinfo->noa_start_time[i] =
897 READEF4BYTE((__le32 *)ie+index);
898 index += 4;
899 }
900
901 if (p2pinfo->opp_ps == 1) {
902 p2pinfo->p2p_ps_mode = P2P_PS_CTWINDOW;
903 /* Driver should wait LPS entering
904 * CTWindow
905 */
906 if (rtlpriv->psc.fw_current_inpsmode)
907 rtl_p2p_ps_cmd(hw,
908 P2P_PS_ENABLE);
909 } else if (p2pinfo->noa_num > 0) {
910 p2pinfo->p2p_ps_mode = P2P_PS_NOA;
911 rtl_p2p_ps_cmd(hw, P2P_PS_ENABLE);
912 } else if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
913 rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE);
914 }
915 }
916 break;
917 }
918 ie += 3 + noa_len;
919 }
920 }
921
922 void rtl_p2p_ps_cmd(struct ieee80211_hw *hw , u8 p2p_ps_state)
923 {
924 struct rtl_priv *rtlpriv = rtl_priv(hw);
925 struct rtl_ps_ctl *rtlps = rtl_psc(rtl_priv(hw));
926 struct rtl_p2p_ps_info *p2pinfo = &(rtlpriv->psc.p2p_ps_info);
927
928 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, " p2p state %x\n" , p2p_ps_state);
929 switch (p2p_ps_state) {
930 case P2P_PS_DISABLE:
931 p2pinfo->p2p_ps_state = p2p_ps_state;
932 rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_H2C_FW_P2P_PS_OFFLOAD,
933 &p2p_ps_state);
934 p2pinfo->noa_index = 0;
935 p2pinfo->ctwindow = 0;
936 p2pinfo->opp_ps = 0;
937 p2pinfo->noa_num = 0;
938 p2pinfo->p2p_ps_mode = P2P_PS_NONE;
939 if (rtlps->fw_current_inpsmode) {
940 if (rtlps->smart_ps == 0) {
941 rtlps->smart_ps = 2;
942 rtlpriv->cfg->ops->set_hw_reg(hw,
943 HW_VAR_H2C_FW_PWRMODE,
944 &rtlps->pwr_mode);
945 }
946
947 }
948 break;
949 case P2P_PS_ENABLE:
950 if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
951 p2pinfo->p2p_ps_state = p2p_ps_state;
952
953 if (p2pinfo->ctwindow > 0) {
954 if (rtlps->smart_ps != 0) {
955 rtlps->smart_ps = 0;
956 rtlpriv->cfg->ops->set_hw_reg(hw,
957 HW_VAR_H2C_FW_PWRMODE,
958 &rtlps->pwr_mode);
959 }
960 }
961 rtlpriv->cfg->ops->set_hw_reg(hw,
962 HW_VAR_H2C_FW_P2P_PS_OFFLOAD,
963 &p2p_ps_state);
964
965 }
966 break;
967 case P2P_PS_SCAN:
968 case P2P_PS_SCAN_DONE:
969 case P2P_PS_ALLSTASLEEP:
970 if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
971 p2pinfo->p2p_ps_state = p2p_ps_state;
972 rtlpriv->cfg->ops->set_hw_reg(hw,
973 HW_VAR_H2C_FW_P2P_PS_OFFLOAD,
974 &p2p_ps_state);
975 }
976 break;
977 default:
978 break;
979 }
980 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD,
981 "ctwindow %x oppps %x\n",
982 p2pinfo->ctwindow , p2pinfo->opp_ps);
983 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD,
984 "count %x duration %x index %x interval %x start time %x noa num %x\n",
985 p2pinfo->noa_count_type[0],
986 p2pinfo->noa_duration[0],
987 p2pinfo->noa_index,
988 p2pinfo->noa_interval[0],
989 p2pinfo->noa_start_time[0],
990 p2pinfo->noa_num);
991 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, "end\n");
992 }
993
994 void rtl_p2p_info(struct ieee80211_hw *hw, void *data, unsigned int len)
995 {
996 struct rtl_priv *rtlpriv = rtl_priv(hw);
997 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
998 struct ieee80211_hdr *hdr = data;
999
1000 if (!mac->p2p)
1001 return;
1002 if (mac->link_state != MAC80211_LINKED)
1003 return;
1004 /* min. beacon length + FCS_LEN */
1005 if (len <= 40 + FCS_LEN)
1006 return;
1007
1008 /* and only beacons from the associated BSSID, please */
1009 if (!ether_addr_equal_64bits(hdr->addr3, rtlpriv->mac80211.bssid))
1010 return;
1011
1012 /* check if this really is a beacon */
1013 if (!(ieee80211_is_beacon(hdr->frame_control) ||
1014 ieee80211_is_probe_resp(hdr->frame_control) ||
1015 ieee80211_is_action(hdr->frame_control)))
1016 return;
1017
1018 if (ieee80211_is_action(hdr->frame_control))
1019 rtl_p2p_action_ie(hw , data , len - FCS_LEN);
1020 else
1021 rtl_p2p_noa_ie(hw , data , len - FCS_LEN);
1022 }
1023 EXPORT_SYMBOL_GPL(rtl_p2p_info);
Motorola kernel-slsi