drivers/net/wireless/rtlwifi/ps.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2009-2012  Realtek Corporation.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * 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         /* Idle for a while if we connect to AP a while ago. */
 447         if (mac->cnt_after_linked >= 2) {
 448                 if (ppsc->dot11_psmode == EACTIVE) {
 449                         RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
 450                                  "Enter 802.11 power save mode...\n");
 451
 452                         rtl_lps_set_psmode(hw, EAUTOPS);
 453                 }
 454         }
 455
 456         spin_unlock_irqrestore(&rtlpriv->locks.lps_lock, flag);
 457 }
 458 EXPORT_SYMBOL(rtl_lps_enter);
 459
 460 /*Leave the leisure power save mode.*/
 461 void rtl_lps_leave(struct ieee80211_hw *hw)
 462 {
 463         struct rtl_priv *rtlpriv = rtl_priv(hw);
 464         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 465         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 466         unsigned long flag;
 467
 468         spin_lock_irqsave(&rtlpriv->locks.lps_lock, flag);
 469
 470         if (ppsc->fwctrl_lps) {
 471                 if (ppsc->dot11_psmode != EACTIVE) {
 472
 473                         /*FIX ME */
 474                         /*rtlpriv->cfg->ops->enable_interrupt(hw); */
 475
 476                         if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM &&
 477                             RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM) &&
 478                             rtlhal->interface == INTF_PCI) {
 479                                 rtlpriv->intf_ops->disable_aspm(hw);
 480                                 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
 481                         }
 482
 483                         RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
 484                                  "Busy Traffic,Leave 802.11 power save..\n");
 485
 486                         rtl_lps_set_psmode(hw, EACTIVE);
 487                 }
 488         }
 489         spin_unlock_irqrestore(&rtlpriv->locks.lps_lock, flag);
 490 }
 491 EXPORT_SYMBOL(rtl_lps_leave);
 492
 493 /* For sw LPS*/
 494 void rtl_swlps_beacon(struct ieee80211_hw *hw, void *data, unsigned int len)
 495 {
 496         struct rtl_priv *rtlpriv = rtl_priv(hw);
 497         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 498         struct ieee80211_hdr *hdr = data;
 499         struct ieee80211_tim_ie *tim_ie;
 500         u8 *tim;
 501         u8 tim_len;
 502         bool u_buffed;
 503         bool m_buffed;
 504
 505         if (mac->opmode != NL80211_IFTYPE_STATION)
 506                 return;
 507
 508         if (!rtlpriv->psc.swctrl_lps)
 509                 return;
 510
 511         if (rtlpriv->mac80211.link_state != MAC80211_LINKED)
 512                 return;
 513
 514         if (!rtlpriv->psc.sw_ps_enabled)
 515                 return;
 516
 517         if (rtlpriv->psc.fwctrl_lps)
 518                 return;
 519
 520         if (likely(!(hw->conf.flags & IEEE80211_CONF_PS)))
 521                 return;
 522
 523         /* check if this really is a beacon */
 524         if (!ieee80211_is_beacon(hdr->frame_control))
 525                 return;
 526
 527         /* min. beacon length + FCS_LEN */
 528         if (len <= 40 + FCS_LEN)
 529                 return;
 530
 531         /* and only beacons from the associated BSSID, please */
 532         if (!ether_addr_equal_64bits(hdr->addr3, rtlpriv->mac80211.bssid))
 533                 return;
 534
 535         rtlpriv->psc.last_beacon = jiffies;
 536
 537         tim = rtl_find_ie(data, len - FCS_LEN, WLAN_EID_TIM);
 538         if (!tim)
 539                 return;
 540
 541         if (tim[1] < sizeof(*tim_ie))
 542                 return;
 543
 544         tim_len = tim[1];
 545         tim_ie = (struct ieee80211_tim_ie *) &tim[2];
 546
 547         if (!WARN_ON_ONCE(!hw->conf.ps_dtim_period))
 548                 rtlpriv->psc.dtim_counter = tim_ie->dtim_count;
 549
 550         /* Check whenever the PHY can be turned off again. */
 551
 552         /* 1. What about buffered unicast traffic for our AID? */
 553         u_buffed = ieee80211_check_tim(tim_ie, tim_len,
 554                                        rtlpriv->mac80211.assoc_id);
 555
 556         /* 2. Maybe the AP wants to send multicast/broadcast data? */
 557         m_buffed = tim_ie->bitmap_ctrl & 0x01;
 558         rtlpriv->psc.multi_buffered = m_buffed;
 559
 560         /* unicast will process by mac80211 through
 561          * set ~IEEE80211_CONF_PS, So we just check
 562          * multicast frames here */
 563         if (!m_buffed) {
 564                 /* back to low-power land. and delay is
 565                  * prevent null power save frame tx fail */
 566                 queue_delayed_work(rtlpriv->works.rtl_wq,
 567                                    &rtlpriv->works.ps_work, MSECS(5));
 568         } else {
 569                 RT_TRACE(rtlpriv, COMP_POWER, DBG_DMESG,
 570                          "u_bufferd: %x, m_buffered: %x\n", u_buffed, m_buffed);
 571         }
 572 }
 573 EXPORT_SYMBOL_GPL(rtl_swlps_beacon);
 574
 575 void rtl_swlps_rf_awake(struct ieee80211_hw *hw)
 576 {
 577         struct rtl_priv *rtlpriv = rtl_priv(hw);
 578         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 579         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 580         unsigned long flag;
 581
 582         if (!rtlpriv->psc.swctrl_lps)
 583                 return;
 584         if (mac->link_state != MAC80211_LINKED)
 585                 return;
 586
 587         if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM &&
 588             RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
 589                 rtlpriv->intf_ops->disable_aspm(hw);
 590                 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
 591         }
 592
 593         spin_lock_irqsave(&rtlpriv->locks.lps_lock, flag);
 594         rtl_ps_set_rf_state(hw, ERFON, RF_CHANGE_BY_PS, false);
 595         spin_unlock_irqrestore(&rtlpriv->locks.lps_lock, flag);
 596 }
 597
 598 void rtl_swlps_rfon_wq_callback(void *data)
 599 {
 600         struct rtl_works *rtlworks =
 601             container_of_dwork_rtl(data, struct rtl_works, ps_rfon_wq);
 602         struct ieee80211_hw *hw = rtlworks->hw;
 603
 604         rtl_swlps_rf_awake(hw);
 605 }
 606
 607 void rtl_swlps_rf_sleep(struct ieee80211_hw *hw)
 608 {
 609         struct rtl_priv *rtlpriv = rtl_priv(hw);
 610         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 611         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 612         unsigned long flag;
 613         u8 sleep_intv;
 614
 615         if (!rtlpriv->psc.sw_ps_enabled)
 616                 return;
 617
 618         if ((rtlpriv->sec.being_setkey) ||
 619             (mac->opmode == NL80211_IFTYPE_ADHOC))
 620                 return;
 621
 622         /*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */
 623         if ((mac->link_state != MAC80211_LINKED) || (mac->cnt_after_linked < 5))
 624                 return;
 625
 626         if (rtlpriv->link_info.busytraffic)
 627                 return;
 628
 629         spin_lock(&rtlpriv->locks.rf_ps_lock);
 630         if (rtlpriv->psc.rfchange_inprogress) {
 631                 spin_unlock(&rtlpriv->locks.rf_ps_lock);
 632                 return;
 633         }
 634         spin_unlock(&rtlpriv->locks.rf_ps_lock);
 635
 636         spin_lock_irqsave(&rtlpriv->locks.lps_lock, flag);
 637         rtl_ps_set_rf_state(hw, ERFSLEEP, RF_CHANGE_BY_PS , false);
 638         spin_unlock_irqrestore(&rtlpriv->locks.lps_lock, flag);
 639
 640         if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM &&
 641             !RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) {
 642                 rtlpriv->intf_ops->enable_aspm(hw);
 643                 RT_SET_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM);
 644         }
 645
 646         /* here is power save alg, when this beacon is DTIM
 647          * we will set sleep time to dtim_period * n;
 648          * when this beacon is not DTIM, we will set sleep
 649          * time to sleep_intv = rtlpriv->psc.dtim_counter or
 650          * MAX_SW_LPS_SLEEP_INTV(default set to 5) */
 651
 652         if (rtlpriv->psc.dtim_counter == 0) {
 653                 if (hw->conf.ps_dtim_period == 1)
 654                         sleep_intv = hw->conf.ps_dtim_period * 2;
 655                 else
 656                         sleep_intv = hw->conf.ps_dtim_period;
 657         } else {
 658                 sleep_intv = rtlpriv->psc.dtim_counter;
 659         }
 660
 661         if (sleep_intv > MAX_SW_LPS_SLEEP_INTV)
 662                 sleep_intv = MAX_SW_LPS_SLEEP_INTV;
 663
 664         /* this print should always be dtim_conter = 0 &
 665          * sleep  = dtim_period, that meaons, we should
 666          * awake before every dtim */
 667         RT_TRACE(rtlpriv, COMP_POWER, DBG_DMESG,
 668                  "dtim_counter:%x will sleep :%d beacon_intv\n",
 669                   rtlpriv->psc.dtim_counter, sleep_intv);
 670
 671         /* we tested that 40ms is enough for sw & hw sw delay */
 672         queue_delayed_work(rtlpriv->works.rtl_wq, &rtlpriv->works.ps_rfon_wq,
 673                         MSECS(sleep_intv * mac->vif->bss_conf.beacon_int - 40));
 674 }
 675
 676 void rtl_lps_change_work_callback(struct work_struct *work)
 677 {
 678         struct rtl_works *rtlworks =
 679             container_of(work, struct rtl_works, lps_change_work);
 680         struct ieee80211_hw *hw = rtlworks->hw;
 681         struct rtl_priv *rtlpriv = rtl_priv(hw);
 682
 683         if (rtlpriv->enter_ps)
 684                 rtl_lps_enter(hw);
 685         else
 686                 rtl_lps_leave(hw);
 687 }
 688 EXPORT_SYMBOL_GPL(rtl_lps_change_work_callback);
 689
 690 void rtl_swlps_wq_callback(void *data)
 691 {
 692         struct rtl_works *rtlworks = container_of_dwork_rtl(data,
 693                                      struct rtl_works,
 694                                      ps_work);
 695         struct ieee80211_hw *hw = rtlworks->hw;
 696         struct rtl_priv *rtlpriv = rtl_priv(hw);
 697         bool ps = false;
 698
 699         ps = (hw->conf.flags & IEEE80211_CONF_PS);
 700
 701         /* we can sleep after ps null send ok */
 702         if (rtlpriv->psc.state_inap) {
 703                 rtl_swlps_rf_sleep(hw);
 704
 705                 if (rtlpriv->psc.state && !ps) {
 706                         rtlpriv->psc.sleep_ms = jiffies_to_msecs(jiffies -
 707                                                  rtlpriv->psc.last_action);
 708                 }
 709
 710                 if (ps)
 711                         rtlpriv->psc.last_slept = jiffies;
 712
 713                 rtlpriv->psc.last_action = jiffies;
 714                 rtlpriv->psc.state = ps;
 715         }
 716 }
 717
 718 static void rtl_p2p_noa_ie(struct ieee80211_hw *hw, void *data,
 719                            unsigned int len)
 720 {
 721         struct rtl_priv *rtlpriv = rtl_priv(hw);
 722         struct ieee80211_mgmt *mgmt = data;
 723         struct rtl_p2p_ps_info *p2pinfo = &(rtlpriv->psc.p2p_ps_info);
 724         u8 *pos, *end, *ie;
 725         u16 noa_len;
 726         static u8 p2p_oui_ie_type[4] = {0x50, 0x6f, 0x9a, 0x09};
 727         u8 noa_num, index , i, noa_index = 0;
 728         bool find_p2p_ie = false , find_p2p_ps_ie = false;
 729         pos = (u8 *)mgmt->u.beacon.variable;
 730         end = data + len;
 731         ie = NULL;
 732
 733         while (pos + 1 < end) {
 734                 if (pos + 2 + pos[1] > end)
 735                         return;
 736
 737                 if (pos[0] == 221 && pos[1] > 4) {
 738                         if (memcmp(&pos[2], p2p_oui_ie_type, 4) == 0) {
 739                                 ie = pos + 2+4;
 740                                 break;
 741                         }
 742                 }
 743                 pos += 2 + pos[1];
 744         }
 745
 746         if (ie == NULL)
 747                 return;
 748         find_p2p_ie = true;
 749         /*to find noa ie*/
 750         while (ie + 1 < end) {
 751                 noa_len = READEF2BYTE((__le16 *)&ie[1]);
 752                 if (ie + 3 + ie[1] > end)
 753                         return;
 754
 755                 if (ie[0] == 12) {
 756                         find_p2p_ps_ie = true;
 757                         if ((noa_len - 2) % 13 != 0) {
 758                                 RT_TRACE(rtlpriv, COMP_INIT, DBG_LOUD,
 759                                          "P2P notice of absence: invalid length.%d\n",
 760                                          noa_len);
 761                                 return;
 762                         } else {
 763                                 noa_num = (noa_len - 2) / 13;
 764                         }
 765                         noa_index = ie[3];
 766                         if (rtlpriv->psc.p2p_ps_info.p2p_ps_mode ==
 767                             P2P_PS_NONE || noa_index != p2pinfo->noa_index) {
 768                                 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD,
 769                                          "update NOA ie.\n");
 770                                 p2pinfo->noa_index = noa_index;
 771                                 p2pinfo->opp_ps = (ie[4] >> 7);
 772                                 p2pinfo->ctwindow = ie[4] & 0x7F;
 773                                 p2pinfo->noa_num = noa_num;
 774                                 index = 5;
 775                                 for (i = 0; i < noa_num; i++) {
 776                                         p2pinfo->noa_count_type[i] =
 777                                                         READEF1BYTE(ie+index);
 778                                         index += 1;
 779                                         p2pinfo->noa_duration[i] =
 780                                                  READEF4BYTE((__le32 *)ie+index);
 781                                         index += 4;
 782                                         p2pinfo->noa_interval[i] =
 783                                                  READEF4BYTE((__le32 *)ie+index);
 784                                         index += 4;
 785                                         p2pinfo->noa_start_time[i] =
 786                                                  READEF4BYTE((__le32 *)ie+index);
 787                                         index += 4;
 788                                 }
 789
 790                                 if (p2pinfo->opp_ps == 1) {
 791                                         p2pinfo->p2p_ps_mode = P2P_PS_CTWINDOW;
 792                                         /* Driver should wait LPS entering
 793                                          * CTWindow
 794                                          */
 795                                         if (rtlpriv->psc.fw_current_inpsmode)
 796                                                 rtl_p2p_ps_cmd(hw,
 797                                                                P2P_PS_ENABLE);
 798                                 } else if (p2pinfo->noa_num > 0) {
 799                                         p2pinfo->p2p_ps_mode = P2P_PS_NOA;
 800                                         rtl_p2p_ps_cmd(hw, P2P_PS_ENABLE);
 801                                 } else if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
 802                                         rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE);
 803                                 }
 804                         }
 805                         break;
 806                 }
 807                 ie += 3 + noa_len;
 808         }
 809
 810         if (find_p2p_ie == true) {
 811                 if ((p2pinfo->p2p_ps_mode > P2P_PS_NONE) &&
 812                     (find_p2p_ps_ie == false))
 813                         rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE);
 814         }
 815 }
 816
 817 static void rtl_p2p_action_ie(struct ieee80211_hw *hw, void *data,
 818                               unsigned int len)
 819 {
 820         struct rtl_priv *rtlpriv = rtl_priv(hw);
 821         struct ieee80211_mgmt *mgmt = data;
 822         struct rtl_p2p_ps_info *p2pinfo = &(rtlpriv->psc.p2p_ps_info);
 823         u8 noa_num, index , i , noa_index = 0;
 824         u8 *pos, *end, *ie;
 825         u16 noa_len;
 826         static u8 p2p_oui_ie_type[4] = {0x50, 0x6f, 0x9a, 0x09};
 827
 828         pos = (u8 *)&mgmt->u.action.category;
 829         end = data + len;
 830         ie = NULL;
 831
 832         if (pos[0] == 0x7f) {
 833                 if (memcmp(&pos[1], p2p_oui_ie_type, 4) == 0)
 834                         ie = pos + 3+4;
 835         }
 836
 837         if (ie == NULL)
 838                 return;
 839
 840         RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, "action frame find P2P IE.\n");
 841         /*to find noa ie*/
 842         while (ie + 1 < end) {
 843                 noa_len = READEF2BYTE((__le16 *)&ie[1]);
 844                 if (ie + 3 + ie[1] > end)
 845                         return;
 846
 847                 if (ie[0] == 12) {
 848                         RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, "find NOA IE.\n");
 849                         RT_PRINT_DATA(rtlpriv, COMP_FW, DBG_LOUD, "noa ie ",
 850                                       ie, noa_len);
 851                         if ((noa_len - 2) % 13 != 0) {
 852                                 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD,
 853                                          "P2P notice of absence: invalid length.%d\n",
 854                                          noa_len);
 855                                 return;
 856                         } else {
 857                                 noa_num = (noa_len - 2) / 13;
 858                         }
 859                         noa_index = ie[3];
 860                         if (rtlpriv->psc.p2p_ps_info.p2p_ps_mode ==
 861                             P2P_PS_NONE || noa_index != p2pinfo->noa_index) {
 862                                 p2pinfo->noa_index = noa_index;
 863                                 p2pinfo->opp_ps = (ie[4] >> 7);
 864                                 p2pinfo->ctwindow = ie[4] & 0x7F;
 865                                 p2pinfo->noa_num = noa_num;
 866                                 index = 5;
 867                                 for (i = 0; i < noa_num; i++) {
 868                                         p2pinfo->noa_count_type[i] =
 869                                                         READEF1BYTE(ie+index);
 870                                         index += 1;
 871                                         p2pinfo->noa_duration[i] =
 872                                                          READEF4BYTE((__le32 *)ie+index);
 873                                         index += 4;
 874                                         p2pinfo->noa_interval[i] =
 875                                                          READEF4BYTE((__le32 *)ie+index);
 876                                         index += 4;
 877                                         p2pinfo->noa_start_time[i] =
 878                                                          READEF4BYTE((__le32 *)ie+index);
 879                                         index += 4;
 880                                 }
 881
 882                                 if (p2pinfo->opp_ps == 1) {
 883                                         p2pinfo->p2p_ps_mode = P2P_PS_CTWINDOW;
 884                                         /* Driver should wait LPS entering
 885                                          * CTWindow
 886                                          */
 887                                         if (rtlpriv->psc.fw_current_inpsmode)
 888                                                 rtl_p2p_ps_cmd(hw,
 889                                                                P2P_PS_ENABLE);
 890                                 } else if (p2pinfo->noa_num > 0) {
 891                                         p2pinfo->p2p_ps_mode = P2P_PS_NOA;
 892                                         rtl_p2p_ps_cmd(hw, P2P_PS_ENABLE);
 893                                 } else if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
 894                                         rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE);
 895                                 }
 896                         }
 897                         break;
 898                 }
 899                 ie += 3 + noa_len;
 900         }
 901 }
 902
 903 void rtl_p2p_ps_cmd(struct ieee80211_hw *hw , u8 p2p_ps_state)
 904 {
 905         struct rtl_priv *rtlpriv = rtl_priv(hw);
 906         struct rtl_ps_ctl *rtlps = rtl_psc(rtl_priv(hw));
 907         struct rtl_p2p_ps_info  *p2pinfo = &(rtlpriv->psc.p2p_ps_info);
 908
 909         RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, " p2p state %x\n" , p2p_ps_state);
 910         switch (p2p_ps_state) {
 911         case P2P_PS_DISABLE:
 912                 p2pinfo->p2p_ps_state = p2p_ps_state;
 913                 rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_H2C_FW_P2P_PS_OFFLOAD,
 914                                               &p2p_ps_state);
 915                 p2pinfo->noa_index = 0;
 916                 p2pinfo->ctwindow = 0;
 917                 p2pinfo->opp_ps = 0;
 918                 p2pinfo->noa_num = 0;
 919                 p2pinfo->p2p_ps_mode = P2P_PS_NONE;
 920                 if (rtlps->fw_current_inpsmode) {
 921                         if (rtlps->smart_ps == 0) {
 922                                 rtlps->smart_ps = 2;
 923                                 rtlpriv->cfg->ops->set_hw_reg(hw,
 924                                          HW_VAR_H2C_FW_PWRMODE,
 925                                          &rtlps->pwr_mode);
 926                         }
 927
 928                 }
 929                 break;
 930         case P2P_PS_ENABLE:
 931                 if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
 932                         p2pinfo->p2p_ps_state = p2p_ps_state;
 933
 934                         if (p2pinfo->ctwindow > 0) {
 935                                 if (rtlps->smart_ps != 0) {
 936                                         rtlps->smart_ps = 0;
 937                                         rtlpriv->cfg->ops->set_hw_reg(hw,
 938                                                  HW_VAR_H2C_FW_PWRMODE,
 939                                                  &rtlps->pwr_mode);
 940                                 }
 941                         }
 942                         rtlpriv->cfg->ops->set_hw_reg(hw,
 943                                  HW_VAR_H2C_FW_P2P_PS_OFFLOAD,
 944                                  &p2p_ps_state);
 945
 946                 }
 947                 break;
 948         case P2P_PS_SCAN:
 949         case P2P_PS_SCAN_DONE:
 950         case P2P_PS_ALLSTASLEEP:
 951                 if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) {
 952                         p2pinfo->p2p_ps_state = p2p_ps_state;
 953                         rtlpriv->cfg->ops->set_hw_reg(hw,
 954                                  HW_VAR_H2C_FW_P2P_PS_OFFLOAD,
 955                                  &p2p_ps_state);
 956                 }
 957                 break;
 958         default:
 959                 break;
 960         }
 961         RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD,
 962                  "ctwindow %x oppps %x\n",
 963                  p2pinfo->ctwindow , p2pinfo->opp_ps);
 964         RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD,
 965                  "count %x duration %x index %x interval %x start time %x noa num %x\n",
 966                  p2pinfo->noa_count_type[0],
 967                  p2pinfo->noa_duration[0],
 968                  p2pinfo->noa_index,
 969                  p2pinfo->noa_interval[0],
 970                  p2pinfo->noa_start_time[0],
 971                  p2pinfo->noa_num);
 972         RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, "end\n");
 973 }
 974
 975 void rtl_p2p_info(struct ieee80211_hw *hw, void *data, unsigned int len)
 976 {
 977         struct rtl_priv *rtlpriv = rtl_priv(hw);
 978         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 979         struct ieee80211_hdr *hdr = data;
 980
 981         if (!mac->p2p)
 982                 return;
 983         if (mac->link_state != MAC80211_LINKED)
 984                 return;
 985         /* min. beacon length + FCS_LEN */
 986         if (len <= 40 + FCS_LEN)
 987                 return;
 988
 989         /* and only beacons from the associated BSSID, please */
 990         if (!ether_addr_equal_64bits(hdr->addr3, rtlpriv->mac80211.bssid))
 991                 return;
 992
 993         /* check if this really is a beacon */
 994         if (!(ieee80211_is_beacon(hdr->frame_control) ||
 995               ieee80211_is_probe_resp(hdr->frame_control) ||
 996               ieee80211_is_action(hdr->frame_control)))
 997                 return;
 998
 999         if (ieee80211_is_action(hdr->frame_control))
1000                 rtl_p2p_action_ie(hw , data , len - FCS_LEN);
1001         else
1002                 rtl_p2p_noa_ie(hw , data , len - FCS_LEN);
1003 }
1004 EXPORT_SYMBOL_GPL(rtl_p2p_info);