projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge branch 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszer...
[deliverable/linux.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
38 /*<1> reset trx ring */
39 if (rtlhal->interface == INTF_PCI)
40 rtlpriv->intf_ops->reset_trx_ring(hw);
41
42 if (is_hal_stop(rtlhal))
43 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
44 "Driver is already down!\n");
45
46 /*<2> Enable Adapter */
47 if (rtlpriv->cfg->ops->hw_init(hw))
48 return false;
49 RT_CLEAR_PS_LEVEL(ppsc, RT_RF_OFF_LEVL_HALT_NIC);
50
51 /*<3> Enable Interrupt */
52 rtlpriv->cfg->ops->enable_interrupt(hw);
53
54 /*<enable timer> */
55 rtl_watch_dog_timer_callback((unsigned long)hw);
56
57 return true;
58 }
59 EXPORT_SYMBOL(rtl_ps_enable_nic);
60
61 bool rtl_ps_disable_nic(struct ieee80211_hw *hw)
62 {
63 struct rtl_priv *rtlpriv = rtl_priv(hw);
64
65 /*<1> Stop all timer */
66 rtl_deinit_deferred_work(hw);
67
68 /*<2> Disable Interrupt */
69 rtlpriv->cfg->ops->disable_interrupt(hw);
70 tasklet_kill(&rtlpriv->works.irq_tasklet);
71
72 /*<3> Disable Adapter */
73 rtlpriv->cfg->ops->hw_disable(hw);
74
75 return true;
76 }
77 EXPORT_SYMBOL(rtl_ps_disable_nic);
78
79 bool rtl_ps_set_rf_state(struct ieee80211_hw *hw,
80 enum rf_pwrstate state_toset,
81 u32 changesource, bool protect_or_not)
82 {
83 struct rtl_priv *rtlpriv = rtl_priv(hw);
84 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
85 enum rf_pwrstate rtstate;
86 bool actionallowed = false;
87 u16 rfwait_cnt = 0;
88
89 if (protect_or_not)
90 goto no_protect;
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 no_protect:
123 rtstate = ppsc->rfpwr_state;
124
125 switch (state_toset) {
126 case ERFON:
127 ppsc->rfoff_reason &= (~changesource);
128
129 if ((changesource == RF_CHANGE_BY_HW) &&
130 (ppsc->hwradiooff)) {
131 ppsc->hwradiooff = false;
132 }
133
134 if (!ppsc->rfoff_reason) {
135 ppsc->rfoff_reason = 0;
136 actionallowed = true;
137 }
138
139 break;
140
141 case ERFOFF:
142
143 if ((changesource == RF_CHANGE_BY_HW) && !ppsc->hwradiooff) {
144 ppsc->hwradiooff = true;
145 }
146
147 ppsc->rfoff_reason |= changesource;
148 actionallowed = true;
149 break;
150
151 case ERFSLEEP:
152 ppsc->rfoff_reason |= changesource;
153 actionallowed = true;
154 break;
155
156 default:
157 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
158 "switch case not processed\n");
159 break;
160 }
161
162 if (actionallowed)
163 rtlpriv->cfg->ops->set_rf_power_state(hw, state_toset);
164
165 if (!protect_or_not) {
166 spin_lock(&rtlpriv->locks.rf_ps_lock);
167 ppsc->rfchange_inprogress = false;
168 spin_unlock(&rtlpriv->locks.rf_ps_lock);
169 }
170
171 return actionallowed;
172 }
173 EXPORT_SYMBOL(rtl_ps_set_rf_state);
174
175 static void _rtl_ps_inactive_ps(struct ieee80211_hw *hw)
176 {
177 struct rtl_priv *rtlpriv = rtl_priv(hw);
178 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
179 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
180
181 ppsc->swrf_processing = true;
182
183 if (ppsc->inactive_pwrstate == ERFON &&
184 rtlhal->interface == INTF_PCI) {
185 if ((ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM) &&
186 RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM) &&
187 rtlhal->interface == INTF_PCI) {
188 rtlpriv->intf_ops->disable_aspm(hw);
189 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
190 }
191 }
192
193 rtl_ps_set_rf_state(hw, ppsc->inactive_pwrstate,
194 RF_CHANGE_BY_IPS, false);
195
196 if (ppsc->inactive_pwrstate == ERFOFF &&
197 rtlhal->interface == INTF_PCI) {
198 if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM &&
199 !RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
200 rtlpriv->intf_ops->enable_aspm(hw);
201 RT_SET_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
202 }
203 }
204
205 ppsc->swrf_processing = false;
206 }
207
208 void rtl_ips_nic_off_wq_callback(void *data)
209 {
210 struct rtl_works *rtlworks =
211 container_of_dwork_rtl(data, struct rtl_works, ips_nic_off_wq);
212 struct ieee80211_hw *hw = rtlworks->hw;
213 struct rtl_priv *rtlpriv = rtl_priv(hw);
214 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
215 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
216 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
217 enum rf_pwrstate rtstate;
218
219 if (mac->opmode != NL80211_IFTYPE_STATION) {
220 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
221 "not station return\n");
222 return;
223 }
224
225 if (mac->p2p_in_use)
226 return;
227
228 if (mac->link_state > MAC80211_NOLINK)
229 return;
230
231 if (is_hal_stop(rtlhal))
232 return;
233
234 if (rtlpriv->sec.being_setkey)
235 return;
236
237 if (rtlpriv->cfg->ops->bt_coex_off_before_lps)
238 rtlpriv->cfg->ops->bt_coex_off_before_lps(hw);
239
240 if (ppsc->inactiveps) {
241 rtstate = ppsc->rfpwr_state;
242
243 /*
244 *Do not enter IPS in the following conditions:
245 *(1) RF is already OFF or Sleep
246 *(2) swrf_processing (indicates the IPS is still under going)
247 *(3) Connectted (only disconnected can trigger IPS)
248 *(4) IBSS (send Beacon)
249 *(5) AP mode (send Beacon)
250 *(6) monitor mode (rcv packet)
251 */
252
253 if (rtstate == ERFON &&
254 !ppsc->swrf_processing &&
255 (mac->link_state == MAC80211_NOLINK) &&
256 !mac->act_scanning) {
257 RT_TRACE(rtlpriv, COMP_RF, DBG_TRACE,
258 "IPSEnter(): Turn off RF\n");
259
260 ppsc->inactive_pwrstate = ERFOFF;
261 ppsc->in_powersavemode = true;
262
263 /* call before RF off */
264 if (rtlpriv->cfg->ops->get_btc_status())
265 rtlpriv->btcoexist.btc_ops->btc_ips_notify(rtlpriv,
266 ppsc->inactive_pwrstate);
267
268 /*rtl_pci_reset_trx_ring(hw); */
269 _rtl_ps_inactive_ps(hw);
270 }
271 }
272 }
273
274 void rtl_ips_nic_off(struct ieee80211_hw *hw)
275 {
276 struct rtl_priv *rtlpriv = rtl_priv(hw);
277
278 /* because when link with ap, mac80211 will ask us
279 * to disable nic quickly after scan before linking,
280 * this will cause link failed, so we delay 100ms here
281 */
282 queue_delayed_work(rtlpriv->works.rtl_wq,
283 &rtlpriv->works.ips_nic_off_wq, MSECS(100));
284 }
285
286 /* NOTICE: any opmode should exc nic_on, or disable without
287 * nic_on may something wrong, like adhoc TP
288 */
289 void rtl_ips_nic_on(struct ieee80211_hw *hw)
290 {
291 struct rtl_priv *rtlpriv = rtl_priv(hw);
292 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
293 enum rf_pwrstate rtstate;
294
295 cancel_delayed_work(&rtlpriv->works.ips_nic_off_wq);
296
297 spin_lock(&rtlpriv->locks.ips_lock);
298 if (ppsc->inactiveps) {
299 rtstate = ppsc->rfpwr_state;
300
301 if (rtstate != ERFON &&
302 !ppsc->swrf_processing &&
303 ppsc->rfoff_reason <= RF_CHANGE_BY_IPS) {
304
305 ppsc->inactive_pwrstate = ERFON;
306 ppsc->in_powersavemode = false;
307 _rtl_ps_inactive_ps(hw);
308 /* call after RF on */
309 if (rtlpriv->cfg->ops->get_btc_status())
310 rtlpriv->btcoexist.btc_ops->btc_ips_notify(rtlpriv,
311 ppsc->inactive_pwrstate);
312 }
313 }
314 spin_unlock(&rtlpriv->locks.ips_lock);
315 }
316 EXPORT_SYMBOL_GPL(rtl_ips_nic_on);
317
318 /*for FW LPS*/
319
320 /*
321 *Determine if we can set Fw into PS mode
322 *in current condition.Return TRUE if it
323 *can enter PS mode.
324 */
325 static bool rtl_get_fwlps_doze(struct ieee80211_hw *hw)
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 u32 ps_timediff;
331
332 ps_timediff = jiffies_to_msecs(jiffies -
333 ppsc->last_delaylps_stamp_jiffies);
334
335 if (ps_timediff < 2000) {
336 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
337 "Delay enter Fw LPS for DHCP, ARP, or EAPOL exchanging state\n");
338 return false;
339 }
340
341 if (mac->link_state != MAC80211_LINKED)
342 return false;
343
344 if (mac->opmode == NL80211_IFTYPE_ADHOC)
345 return false;
346
347 return true;
348 }
349
350 /* Change current and default preamble mode.*/
351 void rtl_lps_set_psmode(struct ieee80211_hw *hw, u8 rt_psmode)
352 {
353 struct rtl_priv *rtlpriv = rtl_priv(hw);
354 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
355 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
356 bool enter_fwlps;
357
358 if (mac->opmode == NL80211_IFTYPE_ADHOC)
359 return;
360
361 if (mac->link_state != MAC80211_LINKED)
362 return;
363
364 if (ppsc->dot11_psmode == rt_psmode)
365 return;
366
367 /* Update power save mode configured. */
368 ppsc->dot11_psmode = rt_psmode;
369
370 /*
371 *<FW control LPS>
372 *1. Enter PS mode
373 * Set RPWM to Fw to turn RF off and send H2C fw_pwrmode
374 * cmd to set Fw into PS mode.
375 *2. Leave PS mode
376 * Send H2C fw_pwrmode cmd to Fw to set Fw into Active
377 * mode and set RPWM to turn RF on.
378 */
379
380 if ((ppsc->fwctrl_lps) && ppsc->report_linked) {
381 if (ppsc->dot11_psmode == EACTIVE) {
382 RT_TRACE(rtlpriv, COMP_RF, DBG_DMESG,
383 "FW LPS leave ps_mode:%x\n",
384 FW_PS_ACTIVE_MODE);
385 enter_fwlps = false;
386 ppsc->pwr_mode = FW_PS_ACTIVE_MODE;
387 ppsc->smart_ps = 0;
388 rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_FW_LPS_ACTION,
389 (u8 *)(&enter_fwlps));
390 if (ppsc->p2p_ps_info.opp_ps)
391 rtl_p2p_ps_cmd(hw , P2P_PS_ENABLE);
392
393 if (rtlpriv->cfg->ops->get_btc_status())
394 rtlpriv->btcoexist.btc_ops->btc_lps_notify(rtlpriv, rt_psmode);
395 } else {
396 if (rtl_get_fwlps_doze(hw)) {
397 RT_TRACE(rtlpriv, COMP_RF, DBG_DMESG,
398 "FW LPS enter ps_mode:%x\n",
399 ppsc->fwctrl_psmode);
400 if (rtlpriv->cfg->ops->get_btc_status())
401 rtlpriv->btcoexist.btc_ops->btc_lps_notify(rtlpriv, rt_psmode);
402 enter_fwlps = true;
403 ppsc->pwr_mode = ppsc->fwctrl_psmode;
404 ppsc->smart_ps = 2;
405 rtlpriv->cfg->ops->set_hw_reg(hw,
406 HW_VAR_FW_LPS_ACTION,
407 (u8 *)(&enter_fwlps));
408
409 } else {
410 /* Reset the power save related parameters. */
411 ppsc->dot11_psmode = EACTIVE;
412 }
413 }
414 }
415 }
416
417 /*Enter the leisure power save mode.*/
418 void rtl_lps_enter(struct ieee80211_hw *hw)
419 {
420 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
421 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
422 struct rtl_priv *rtlpriv = rtl_priv(hw);
423 unsigned long flag;
424
425 if (!ppsc->fwctrl_lps)
426 return;
427
428 if (rtlpriv->sec.being_setkey)
429 return;
430
431 if (rtlpriv->link_info.busytraffic)
432 return;
433
434 /*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */
435 if (mac->cnt_after_linked < 5)
436 return;
437
438 if (mac->opmode == NL80211_IFTYPE_ADHOC)
439 return;
440
441 if (mac->link_state != MAC80211_LINKED)
442 return;
443
444 spin_lock_irqsave(&rtlpriv->locks.lps_lock, flag);
445
446 if (ppsc->dot11_psmode == EACTIVE) {
447 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
448 "Enter 802.11 power save mode...\n");
449 rtl_lps_set_psmode(hw, EAUTOPS);
450 }
451
452 spin_unlock_irqrestore(&rtlpriv->locks.lps_lock, flag);
453 }
454 EXPORT_SYMBOL(rtl_lps_enter);
455
456 /*Leave the leisure power save mode.*/
457 void rtl_lps_leave(struct ieee80211_hw *hw)
458 {
459 struct rtl_priv *rtlpriv = rtl_priv(hw);
460 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
461 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
462 unsigned long flag;
463
464 spin_lock_irqsave(&rtlpriv->locks.lps_lock, flag);
465
466 if (ppsc->fwctrl_lps) {
467 if (ppsc->dot11_psmode != EACTIVE) {
468
469 /*FIX ME */
470 /*rtlpriv->cfg->ops->enable_interrupt(hw); */
471
472 if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM &&
473 RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM) &&
474 rtlhal->interface == INTF_PCI) {
475 rtlpriv->intf_ops->disable_aspm(hw);
476 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
477 }
478
479 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
480 "Busy Traffic,Leave 802.11 power save..\n");
481
482 rtl_lps_set_psmode(hw, EACTIVE);
483 }
484 }
485 spin_unlock_irqrestore(&rtlpriv->locks.lps_lock, flag);
486 }
487 EXPORT_SYMBOL(rtl_lps_leave);
488
489 /* For sw LPS*/
490 void rtl_swlps_beacon(struct ieee80211_hw *hw, void *data, unsigned int len)
491 {
492 struct rtl_priv *rtlpriv = rtl_priv(hw);
493 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
494 struct ieee80211_hdr *hdr = data;
495 struct ieee80211_tim_ie *tim_ie;
496 u8 *tim;
497 u8 tim_len;
498 bool u_buffed;
499 bool m_buffed;
500
501 if (mac->opmode != NL80211_IFTYPE_STATION)
502 return;
503
504 if (!rtlpriv->psc.swctrl_lps)
505 return;
506
507 if (rtlpriv->mac80211.link_state != MAC80211_LINKED)
508 return;
509
510 if (!rtlpriv->psc.sw_ps_enabled)
511 return;
512
513 if (rtlpriv->psc.fwctrl_lps)
514 return;
515
516 if (likely(!(hw->conf.flags & IEEE80211_CONF_PS)))
517 return;
518
519 /* check if this really is a beacon */
520 if (!ieee80211_is_beacon(hdr->frame_control))
521 return;
522
523 /* min. beacon length + FCS_LEN */
524 if (len <= 40 + FCS_LEN)
525 return;
526
527 /* and only beacons from the associated BSSID, please */
528 if (!ether_addr_equal_64bits(hdr->addr3, rtlpriv->mac80211.bssid))
529 return;
530
531 rtlpriv->psc.last_beacon = jiffies;
532
533 tim = rtl_find_ie(data, len - FCS_LEN, WLAN_EID_TIM);
534 if (!tim)
535 return;
536
537 if (tim[1] < sizeof(*tim_ie))
538 return;
539
540 tim_len = tim[1];
541 tim_ie = (struct ieee80211_tim_ie *) &tim[2];
542
543 if (!WARN_ON_ONCE(!hw->conf.ps_dtim_period))
544 rtlpriv->psc.dtim_counter = tim_ie->dtim_count;
545
546 /* Check whenever the PHY can be turned off again. */
547
548 /* 1. What about buffered unicast traffic for our AID? */
549 u_buffed = ieee80211_check_tim(tim_ie, tim_len,
550 rtlpriv->mac80211.assoc_id);
551
552 /* 2. Maybe the AP wants to send multicast/broadcast data? */
553 m_buffed = tim_ie->bitmap_ctrl & 0x01;
554 rtlpriv->psc.multi_buffered = m_buffed;
555
556 /* unicast will process by mac80211 through
557 * set ~IEEE80211_CONF_PS, So we just check
558 * multicast frames here */
559 if (!m_buffed) {
560 /* back to low-power land. and delay is
561 * prevent null power save frame tx fail */
562 queue_delayed_work(rtlpriv->works.rtl_wq,
563 &rtlpriv->works.ps_work, MSECS(5));
564 } else {
565 RT_TRACE(rtlpriv, COMP_POWER, DBG_DMESG,
566 "u_bufferd: %x, m_buffered: %x\n", u_buffed, m_buffed);
567 }
568 }
569 EXPORT_SYMBOL_GPL(rtl_swlps_beacon);
570
571 void rtl_swlps_rf_awake(struct ieee80211_hw *hw)
572 {
573 struct rtl_priv *rtlpriv = rtl_priv(hw);
574 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
575 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
576 unsigned long flag;
577
578 if (!rtlpriv->psc.swctrl_lps)
579 return;
580 if (mac->link_state != MAC80211_LINKED)
581 return;
582
583 if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM &&
584 RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
585 rtlpriv->intf_ops->disable_aspm(hw);
586 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
587 }
588
589 spin_lock_irqsave(&rtlpriv->locks.lps_lock, flag);
590 rtl_ps_set_rf_state(hw, ERFON, RF_CHANGE_BY_PS, false);
591 spin_unlock_irqrestore(&rtlpriv->locks.lps_lock, flag);
592 }
593
594 void rtl_swlps_rfon_wq_callback(void *data)
595 {
596 struct rtl_works *rtlworks =
597 container_of_dwork_rtl(data, struct rtl_works, ps_rfon_wq);
598 struct ieee80211_hw *hw = rtlworks->hw;
599
600 rtl_swlps_rf_awake(hw);
601 }
602
603 void rtl_swlps_rf_sleep(struct ieee80211_hw *hw)
604 {
605 struct rtl_priv *rtlpriv = rtl_priv(hw);
606 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
607 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
608 unsigned long flag;
609 u8 sleep_intv;
610
611 if (!rtlpriv->psc.sw_ps_enabled)
612 return;
613
614 if ((rtlpriv->sec.being_setkey) ||
615 (mac->opmode == NL80211_IFTYPE_ADHOC))
616 return;
617
618 /*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */
619 if ((mac->link_state != MAC80211_LINKED) || (mac->cnt_after_linked < 5))
620 return;
621
622 if (rtlpriv->link_info.busytraffic)
623 return;
624
625 spin_lock(&rtlpriv->locks.rf_ps_lock);
626 if (rtlpriv->psc.rfchange_inprogress) {
627 spin_unlock(&rtlpriv->locks.rf_ps_lock);
628 return;
629 }
630 spin_unlock(&rtlpriv->locks.rf_ps_lock);
631
632 spin_lock_irqsave(&rtlpriv->locks.lps_lock, flag);
633 rtl_ps_set_rf_state(hw, ERFSLEEP, RF_CHANGE_BY_PS , false);
634 spin_unlock_irqrestore(&rtlpriv->locks.lps_lock, flag);
635
636 if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM &&
637 !RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
638 rtlpriv->intf_ops->enable_aspm(hw);
639 RT_SET_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
640 }
641
642 /* here is power save alg, when this beacon is DTIM
643 * we will set sleep time to dtim_period * n;
644 * when this beacon is not DTIM, we will set sleep
645 * time to sleep_intv = rtlpriv->psc.dtim_counter or
646 * MAX_SW_LPS_SLEEP_INTV(default set to 5) */
647
648 if (rtlpriv->psc.dtim_counter == 0) {
649 if (hw->conf.ps_dtim_period == 1)
650 sleep_intv = hw->conf.ps_dtim_period * 2;
651 else
652 sleep_intv = hw->conf.ps_dtim_period;
653 } else {
654 sleep_intv = rtlpriv->psc.dtim_counter;
655 }
656
657 if (sleep_intv > MAX_SW_LPS_SLEEP_INTV)
658 sleep_intv = MAX_SW_LPS_SLEEP_INTV;
659
660 /* this print should always be dtim_conter = 0 &
661 * sleep = dtim_period, that meaons, we should
662 * awake before every dtim */
663 RT_TRACE(rtlpriv, COMP_POWER, DBG_DMESG,
664 "dtim_counter:%x will sleep :%d beacon_intv\n",
665 rtlpriv->psc.dtim_counter, sleep_intv);
666
667 /* we tested that 40ms is enough for sw & hw sw delay */
668 queue_delayed_work(rtlpriv->works.rtl_wq, &rtlpriv->works.ps_rfon_wq,
669 MSECS(sleep_intv * mac->vif->bss_conf.beacon_int - 40));
670 }
671
672 void rtl_lps_change_work_callback(struct work_struct *work)
673 {
674 struct rtl_works *rtlworks =
675 container_of(work, struct rtl_works, lps_change_work);
676 struct ieee80211_hw *hw = rtlworks->hw;
677 struct rtl_priv *rtlpriv = rtl_priv(hw);
678
679 if (rtlpriv->enter_ps)
680 rtl_lps_enter(hw);
681 else
682 rtl_lps_leave(hw);
683 }
684 EXPORT_SYMBOL_GPL(rtl_lps_change_work_callback);
685
686 void rtl_swlps_wq_callback(void *data)
687 {
688 struct rtl_works *rtlworks = container_of_dwork_rtl(data,
689 struct rtl_works,
690 ps_work);
691 struct ieee80211_hw *hw = rtlworks->hw;
692 struct rtl_priv *rtlpriv = rtl_priv(hw);
693 bool ps = false;
694
695 ps = (hw->conf.flags & IEEE80211_CONF_PS);
696
697 /* we can sleep after ps null send ok */
698 if (rtlpriv->psc.state_inap) {
699 rtl_swlps_rf_sleep(hw);
700
701 if (rtlpriv->psc.state && !ps) {
702 rtlpriv->psc.sleep_ms = jiffies_to_msecs(jiffies -
703 rtlpriv->psc.last_action);
704 }
705
706 if (ps)
707 rtlpriv->psc.last_slept = jiffies;
708
709 rtlpriv->psc.last_action = jiffies;
710 rtlpriv->psc.state = ps;
711 }
712 }
713
714 static void rtl_p2p_noa_ie(struct ieee80211_hw *hw, void *data,
715 unsigned int len)
716 {
717 struct rtl_priv *rtlpriv = rtl_priv(hw);
718 struct ieee80211_mgmt *mgmt = data;
719 struct rtl_p2p_ps_info *p2pinfo = &(rtlpriv->psc.p2p_ps_info);
720 u8 *pos, *end, *ie;
721 u16 noa_len;
722 static u8 p2p_oui_ie_type[4] = {0x50, 0x6f, 0x9a, 0x09};
723 u8 noa_num, index , i, noa_index = 0;
724 bool find_p2p_ie = false , find_p2p_ps_ie = false;
725 pos = (u8 *)mgmt->u.beacon.variable;
726 end = data + len;
727 ie = NULL;
728
729 while (pos + 1 < end) {
730 if (pos + 2 + pos[1] > end)
731 return;
732
733 if (pos[0] == 221 && pos[1] > 4) {
734 if (memcmp(&pos[2], p2p_oui_ie_type, 4) == 0) {
735 ie = pos + 2+4;
736 break;
737 }
738 }
739 pos += 2 + pos[1];
740 }
741
742 if (ie == NULL)
743 return;
744 find_p2p_ie = true;
745 /*to find noa ie*/
746 while (ie + 1 < end) {
747 noa_len = READEF2BYTE((__le16 *)&ie[1]);
748 if (ie + 3 + ie[1] > end)
749 return;
750
751 if (ie[0] == 12) {
752 find_p2p_ps_ie = true;
753 if ((noa_len - 2) % 13 != 0) {
754 RT_TRACE(rtlpriv, COMP_INIT, DBG_LOUD,
755 "P2P notice of absence: invalid length.%d\n",
756 noa_len);
757 return;
758 } else {
759 noa_num = (noa_len - 2) / 13;
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 }
855 noa_index = ie[3];
856 if (rtlpriv->psc.p2p_ps_info.p2p_ps_mode ==
857 P2P_PS_NONE || noa_index != p2pinfo->noa_index) {
858 p2pinfo->noa_index = noa_index;
859 p2pinfo->opp_ps = (ie[4] >> 7);
860 p2pinfo->ctwindow = ie[4] & 0x7F;
861 p2pinfo->noa_num = noa_num;
862 index = 5;
863 for (i = 0; i < noa_num; i++) {
864 p2pinfo->noa_count_type[i] =
865 READEF1BYTE(ie+index);
866 index += 1;
867 p2pinfo->noa_duration[i] =
868 READEF4BYTE((__le32 *)ie+index);
869 index += 4;
870 p2pinfo->noa_interval[i] =
871 READEF4BYTE((__le32 *)ie+index);
872 index += 4;
873 p2pinfo->noa_start_time[i] =
874 READEF4BYTE((__le32 *)ie+index);
875 index += 4;
876 }
877
878 if (p2pinfo->opp_ps == 1) {
879 p2pinfo->p2p_ps_mode = P2P_PS_CTWINDOW;
880 /* Driver should wait LPS entering
881 * CTWindow
882 */
883 if (rtlpriv->psc.fw_current_inpsmode)
884 rtl_p2p_ps_cmd(hw,
885 P2P_PS_ENABLE);
886 } else if (p2pinfo->noa_num > 0) {
887 p2pinfo->p2p_ps_mode = P2P_PS_NOA;
888 rtl_p2p_ps_cmd(hw, P2P_PS_ENABLE);
889 } else if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
890 rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE);
891 }
892 }
893 break;
894 }
895 ie += 3 + noa_len;
896 }
897 }
898
899 void rtl_p2p_ps_cmd(struct ieee80211_hw *hw , u8 p2p_ps_state)
900 {
901 struct rtl_priv *rtlpriv = rtl_priv(hw);
902 struct rtl_ps_ctl *rtlps = rtl_psc(rtl_priv(hw));
903 struct rtl_p2p_ps_info *p2pinfo = &(rtlpriv->psc.p2p_ps_info);
904
905 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, " p2p state %x\n" , p2p_ps_state);
906 switch (p2p_ps_state) {
907 case P2P_PS_DISABLE:
908 p2pinfo->p2p_ps_state = p2p_ps_state;
909 rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_H2C_FW_P2P_PS_OFFLOAD,
910 &p2p_ps_state);
911 p2pinfo->noa_index = 0;
912 p2pinfo->ctwindow = 0;
913 p2pinfo->opp_ps = 0;
914 p2pinfo->noa_num = 0;
915 p2pinfo->p2p_ps_mode = P2P_PS_NONE;
916 if (rtlps->fw_current_inpsmode) {
917 if (rtlps->smart_ps == 0) {
918 rtlps->smart_ps = 2;
919 rtlpriv->cfg->ops->set_hw_reg(hw,
920 HW_VAR_H2C_FW_PWRMODE,
921 &rtlps->pwr_mode);
922 }
923
924 }
925 break;
926 case P2P_PS_ENABLE:
927 if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
928 p2pinfo->p2p_ps_state = p2p_ps_state;
929
930 if (p2pinfo->ctwindow > 0) {
931 if (rtlps->smart_ps != 0) {
932 rtlps->smart_ps = 0;
933 rtlpriv->cfg->ops->set_hw_reg(hw,
934 HW_VAR_H2C_FW_PWRMODE,
935 &rtlps->pwr_mode);
936 }
937 }
938 rtlpriv->cfg->ops->set_hw_reg(hw,
939 HW_VAR_H2C_FW_P2P_PS_OFFLOAD,
940 &p2p_ps_state);
941
942 }
943 break;
944 case P2P_PS_SCAN:
945 case P2P_PS_SCAN_DONE:
946 case P2P_PS_ALLSTASLEEP:
947 if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
948 p2pinfo->p2p_ps_state = p2p_ps_state;
949 rtlpriv->cfg->ops->set_hw_reg(hw,
950 HW_VAR_H2C_FW_P2P_PS_OFFLOAD,
951 &p2p_ps_state);
952 }
953 break;
954 default:
955 break;
956 }
957 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD,
958 "ctwindow %x oppps %x\n",
959 p2pinfo->ctwindow , p2pinfo->opp_ps);
960 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD,
961 "count %x duration %x index %x interval %x start time %x noa num %x\n",
962 p2pinfo->noa_count_type[0],
963 p2pinfo->noa_duration[0],
964 p2pinfo->noa_index,
965 p2pinfo->noa_interval[0],
966 p2pinfo->noa_start_time[0],
967 p2pinfo->noa_num);
968 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, "end\n");
969 }
970
971 void rtl_p2p_info(struct ieee80211_hw *hw, void *data, unsigned int len)
972 {
973 struct rtl_priv *rtlpriv = rtl_priv(hw);
974 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
975 struct ieee80211_hdr *hdr = data;
976
977 if (!mac->p2p)
978 return;
979 if (mac->link_state != MAC80211_LINKED)
980 return;
981 /* min. beacon length + FCS_LEN */
982 if (len <= 40 + FCS_LEN)
983 return;
984
985 /* and only beacons from the associated BSSID, please */
986 if (!ether_addr_equal_64bits(hdr->addr3, rtlpriv->mac80211.bssid))
987 return;
988
989 /* check if this really is a beacon */
990 if (!(ieee80211_is_beacon(hdr->frame_control) ||
991 ieee80211_is_probe_resp(hdr->frame_control) ||
992 ieee80211_is_action(hdr->frame_control)))
993 return;
994
995 if (ieee80211_is_action(hdr->frame_control))
996 rtl_p2p_action_ie(hw , data , len - FCS_LEN);
997 else
998 rtl_p2p_noa_ie(hw , data , len - FCS_LEN);
999 }
1000 EXPORT_SYMBOL_GPL(rtl_p2p_info);
Linux kernel - Deliverables
This page took 0.052739 seconds and 6 git commands to generate.