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