1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright(c) 2009-2012 Realtek Corporation.*/ 3 4 #include "wifi.h" 5 #include "base.h" 6 #include "ps.h" 7 #include <linux/export.h> 8 #include "btcoexist/rtl_btc.h" 9 10 bool rtl_ps_enable_nic(struct ieee80211_hw *hw) 11 { 12 struct rtl_priv *rtlpriv = rtl_priv(hw); 13 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw)); 14 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw)); 15 struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw)); 16 17 /*<1> reset trx ring */ 18 if (rtlhal->interface == INTF_PCI) 19 rtlpriv->intf_ops->reset_trx_ring(hw); 20 21 if (is_hal_stop(rtlhal)) 22 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING, 23 "Driver is already down!\n"); 24 25 /*<2> Enable Adapter */ 26 if (rtlpriv->cfg->ops->hw_init(hw)) 27 return false; 28 rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_RETRY_LIMIT, 29 &rtlmac->retry_long); 30 RT_CLEAR_PS_LEVEL(ppsc, RT_RF_OFF_LEVL_HALT_NIC); 31 32 rtlpriv->cfg->ops->switch_channel(hw); 33 rtlpriv->cfg->ops->set_channel_access(hw); 34 rtlpriv->cfg->ops->set_bw_mode(hw, 35 cfg80211_get_chandef_type(&hw->conf.chandef)); 36 37 /*<3> Enable Interrupt */ 38 rtlpriv->cfg->ops->enable_interrupt(hw); 39 40 /*<enable timer> */ 41 rtl_watch_dog_timer_callback(&rtlpriv->works.watchdog_timer); 42 43 return true; 44 } 45 EXPORT_SYMBOL(rtl_ps_enable_nic); 46 47 bool rtl_ps_disable_nic(struct ieee80211_hw *hw) 48 { 49 struct rtl_priv *rtlpriv = rtl_priv(hw); 50 51 /*<1> Stop all timer */ 52 rtl_deinit_deferred_work(hw, true); 53 54 /*<2> Disable Interrupt */ 55 rtlpriv->cfg->ops->disable_interrupt(hw); 56 tasklet_kill(&rtlpriv->works.irq_tasklet); 57 58 /*<3> Disable Adapter */ 59 rtlpriv->cfg->ops->hw_disable(hw); 60 61 return true; 62 } 63 EXPORT_SYMBOL(rtl_ps_disable_nic); 64 65 static bool rtl_ps_set_rf_state(struct ieee80211_hw *hw, 66 enum rf_pwrstate state_toset, 67 u32 changesource) 68 { 69 struct rtl_priv *rtlpriv = rtl_priv(hw); 70 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw)); 71 enum rf_pwrstate rtstate; 72 bool actionallowed = false; 73 u16 rfwait_cnt = 0; 74 75 /*Only one thread can change 76 *the RF state at one time, and others 77 *should wait to be executed. 78 */ 79 while (true) { 80 spin_lock(&rtlpriv->locks.rf_ps_lock); 81 if (ppsc->rfchange_inprogress) { 82 spin_unlock(&rtlpriv->locks.rf_ps_lock); 83 84 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING, 85 "RF Change in progress! Wait to set..state_toset(%d).\n", 86 state_toset); 87 88 /* Set RF after the previous action is done. */ 89 while (ppsc->rfchange_inprogress) { 90 rfwait_cnt++; 91 mdelay(1); 92 /*Wait too long, return false to avoid 93 *to be stuck here. 94 */ 95 if (rfwait_cnt > 100) 96 return false; 97 } 98 } else { 99 ppsc->rfchange_inprogress = true; 100 spin_unlock(&rtlpriv->locks.rf_ps_lock); 101 break; 102 } 103 } 104 105 rtstate = ppsc->rfpwr_state; 106 107 switch (state_toset) { 108 case ERFON: 109 ppsc->rfoff_reason &= (~changesource); 110 111 if ((changesource == RF_CHANGE_BY_HW) && 112 (ppsc->hwradiooff)) { 113 ppsc->hwradiooff = false; 114 } 115 116 if (!ppsc->rfoff_reason) { 117 ppsc->rfoff_reason = 0; 118 actionallowed = true; 119 } 120 121 break; 122 123 case ERFOFF: 124 125 if ((changesource == RF_CHANGE_BY_HW) && !ppsc->hwradiooff) { 126 ppsc->hwradiooff = true; 127 } 128 129 ppsc->rfoff_reason |= changesource; 130 actionallowed = true; 131 break; 132 133 case ERFSLEEP: 134 ppsc->rfoff_reason |= changesource; 135 actionallowed = true; 136 break; 137 138 default: 139 pr_err("switch case %#x not processed\n", state_toset); 140 break; 141 } 142 143 if (actionallowed) 144 rtlpriv->cfg->ops->set_rf_power_state(hw, state_toset); 145 146 spin_lock(&rtlpriv->locks.rf_ps_lock); 147 ppsc->rfchange_inprogress = false; 148 spin_unlock(&rtlpriv->locks.rf_ps_lock); 149 150 return actionallowed; 151 } 152 153 static void _rtl_ps_inactive_ps(struct ieee80211_hw *hw) 154 { 155 struct rtl_priv *rtlpriv = rtl_priv(hw); 156 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw)); 157 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw)); 158 159 ppsc->swrf_processing = true; 160 161 if (ppsc->inactive_pwrstate == ERFON && 162 rtlhal->interface == INTF_PCI) { 163 if ((ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM) && 164 RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM) && 165 rtlhal->interface == INTF_PCI) { 166 rtlpriv->intf_ops->disable_aspm(hw); 167 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM); 168 } 169 } 170 171 rtl_ps_set_rf_state(hw, ppsc->inactive_pwrstate, 172 RF_CHANGE_BY_IPS); 173 174 if (ppsc->inactive_pwrstate == ERFOFF && 175 rtlhal->interface == INTF_PCI) { 176 if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM && 177 !RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) { 178 rtlpriv->intf_ops->enable_aspm(hw); 179 RT_SET_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM); 180 } 181 } 182 183 ppsc->swrf_processing = false; 184 } 185 186 void rtl_ips_nic_off_wq_callback(void *data) 187 { 188 struct rtl_works *rtlworks = 189 container_of_dwork_rtl(data, struct rtl_works, ips_nic_off_wq); 190 struct ieee80211_hw *hw = rtlworks->hw; 191 struct rtl_priv *rtlpriv = rtl_priv(hw); 192 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw)); 193 struct rtl_mac *mac = rtl_mac(rtl_priv(hw)); 194 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw)); 195 enum rf_pwrstate rtstate; 196 197 if (mac->opmode != NL80211_IFTYPE_STATION) { 198 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING, 199 "not station return\n"); 200 return; 201 } 202 203 if (mac->p2p_in_use) 204 return; 205 206 if (mac->link_state > MAC80211_NOLINK) 207 return; 208 209 if (is_hal_stop(rtlhal)) 210 return; 211 212 if (rtlpriv->sec.being_setkey) 213 return; 214 215 if (rtlpriv->cfg->ops->bt_coex_off_before_lps) 216 rtlpriv->cfg->ops->bt_coex_off_before_lps(hw); 217 218 if (ppsc->inactiveps) { 219 rtstate = ppsc->rfpwr_state; 220 221 /* 222 *Do not enter IPS in the following conditions: 223 *(1) RF is already OFF or Sleep 224 *(2) swrf_processing (indicates the IPS is still under going) 225 *(3) Connectted (only disconnected can trigger IPS) 226 *(4) IBSS (send Beacon) 227 *(5) AP mode (send Beacon) 228 *(6) monitor mode (rcv packet) 229 */ 230 231 if (rtstate == ERFON && 232 !ppsc->swrf_processing && 233 (mac->link_state == MAC80211_NOLINK) && 234 !mac->act_scanning) { 235 RT_TRACE(rtlpriv, COMP_RF, DBG_TRACE, 236 "IPSEnter(): Turn off RF\n"); 237 238 ppsc->inactive_pwrstate = ERFOFF; 239 ppsc->in_powersavemode = true; 240 241 /* call before RF off */ 242 if (rtlpriv->cfg->ops->get_btc_status()) 243 rtlpriv->btcoexist.btc_ops->btc_ips_notify(rtlpriv, 244 ppsc->inactive_pwrstate); 245 246 /*rtl_pci_reset_trx_ring(hw); */ 247 _rtl_ps_inactive_ps(hw); 248 } 249 } 250 } 251 252 void rtl_ips_nic_off(struct ieee80211_hw *hw) 253 { 254 struct rtl_priv *rtlpriv = rtl_priv(hw); 255 256 /* because when link with ap, mac80211 will ask us 257 * to disable nic quickly after scan before linking, 258 * this will cause link failed, so we delay 100ms here 259 */ 260 queue_delayed_work(rtlpriv->works.rtl_wq, 261 &rtlpriv->works.ips_nic_off_wq, MSECS(100)); 262 } 263 264 /* NOTICE: any opmode should exc nic_on, or disable without 265 * nic_on may something wrong, like adhoc TP 266 */ 267 void rtl_ips_nic_on(struct ieee80211_hw *hw) 268 { 269 struct rtl_priv *rtlpriv = rtl_priv(hw); 270 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw)); 271 enum rf_pwrstate rtstate; 272 273 cancel_delayed_work_sync(&rtlpriv->works.ips_nic_off_wq); 274 275 mutex_lock(&rtlpriv->locks.ips_mutex); 276 if (ppsc->inactiveps) { 277 rtstate = ppsc->rfpwr_state; 278 279 if (rtstate != ERFON && 280 !ppsc->swrf_processing && 281 ppsc->rfoff_reason <= RF_CHANGE_BY_IPS) { 282 283 ppsc->inactive_pwrstate = ERFON; 284 ppsc->in_powersavemode = false; 285 _rtl_ps_inactive_ps(hw); 286 /* call after RF on */ 287 if (rtlpriv->cfg->ops->get_btc_status()) 288 rtlpriv->btcoexist.btc_ops->btc_ips_notify(rtlpriv, 289 ppsc->inactive_pwrstate); 290 } 291 } 292 mutex_unlock(&rtlpriv->locks.ips_mutex); 293 } 294 EXPORT_SYMBOL_GPL(rtl_ips_nic_on); 295 296 /*for FW LPS*/ 297 298 /* 299 *Determine if we can set Fw into PS mode 300 *in current condition.Return TRUE if it 301 *can enter PS mode. 302 */ 303 static bool rtl_get_fwlps_doze(struct ieee80211_hw *hw) 304 { 305 struct rtl_priv *rtlpriv = rtl_priv(hw); 306 struct rtl_mac *mac = rtl_mac(rtl_priv(hw)); 307 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw)); 308 u32 ps_timediff; 309 310 ps_timediff = jiffies_to_msecs(jiffies - 311 ppsc->last_delaylps_stamp_jiffies); 312 313 if (ps_timediff < 2000) { 314 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD, 315 "Delay enter Fw LPS for DHCP, ARP, or EAPOL exchanging state\n"); 316 return false; 317 } 318 319 if (mac->link_state != MAC80211_LINKED) 320 return false; 321 322 if (mac->opmode == NL80211_IFTYPE_ADHOC) 323 return false; 324 325 return true; 326 } 327 328 /* Change current and default preamble mode.*/ 329 void rtl_lps_set_psmode(struct ieee80211_hw *hw, u8 rt_psmode) 330 { 331 struct rtl_priv *rtlpriv = rtl_priv(hw); 332 struct rtl_mac *mac = rtl_mac(rtl_priv(hw)); 333 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw)); 334 bool enter_fwlps; 335 336 if (mac->opmode == NL80211_IFTYPE_ADHOC) 337 return; 338 339 if (mac->link_state != MAC80211_LINKED) 340 return; 341 342 if (ppsc->dot11_psmode == rt_psmode && rt_psmode == EACTIVE) 343 return; 344 345 /* Update power save mode configured. */ 346 ppsc->dot11_psmode = rt_psmode; 347 348 /* 349 *<FW control LPS> 350 *1. Enter PS mode 351 * Set RPWM to Fw to turn RF off and send H2C fw_pwrmode 352 * cmd to set Fw into PS mode. 353 *2. Leave PS mode 354 * Send H2C fw_pwrmode cmd to Fw to set Fw into Active 355 * mode and set RPWM to turn RF on. 356 */ 357 358 if ((ppsc->fwctrl_lps) && ppsc->report_linked) { 359 if (ppsc->dot11_psmode == EACTIVE) { 360 RT_TRACE(rtlpriv, COMP_RF, DBG_DMESG, 361 "FW LPS leave ps_mode:%x\n", 362 FW_PS_ACTIVE_MODE); 363 enter_fwlps = false; 364 ppsc->pwr_mode = FW_PS_ACTIVE_MODE; 365 ppsc->smart_ps = 0; 366 rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_FW_LPS_ACTION, 367 (u8 *)(&enter_fwlps)); 368 if (ppsc->p2p_ps_info.opp_ps) 369 rtl_p2p_ps_cmd(hw , P2P_PS_ENABLE); 370 371 if (rtlpriv->cfg->ops->get_btc_status()) 372 rtlpriv->btcoexist.btc_ops->btc_lps_notify(rtlpriv, rt_psmode); 373 } else { 374 if (rtl_get_fwlps_doze(hw)) { 375 RT_TRACE(rtlpriv, COMP_RF, DBG_DMESG, 376 "FW LPS enter ps_mode:%x\n", 377 ppsc->fwctrl_psmode); 378 if (rtlpriv->cfg->ops->get_btc_status()) 379 rtlpriv->btcoexist.btc_ops->btc_lps_notify(rtlpriv, rt_psmode); 380 enter_fwlps = true; 381 ppsc->pwr_mode = ppsc->fwctrl_psmode; 382 ppsc->smart_ps = 2; 383 rtlpriv->cfg->ops->set_hw_reg(hw, 384 HW_VAR_FW_LPS_ACTION, 385 (u8 *)(&enter_fwlps)); 386 387 } else { 388 /* Reset the power save related parameters. */ 389 ppsc->dot11_psmode = EACTIVE; 390 } 391 } 392 } 393 } 394 395 /* Interrupt safe routine to enter the leisure power save mode.*/ 396 static void rtl_lps_enter_core(struct ieee80211_hw *hw) 397 { 398 struct rtl_mac *mac = rtl_mac(rtl_priv(hw)); 399 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw)); 400 struct rtl_priv *rtlpriv = rtl_priv(hw); 401 402 if (!ppsc->fwctrl_lps) 403 return; 404 405 if (rtlpriv->sec.being_setkey) 406 return; 407 408 if (rtlpriv->link_info.busytraffic) 409 return; 410 411 /*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */ 412 if (mac->cnt_after_linked < 5) 413 return; 414 415 if (mac->opmode == NL80211_IFTYPE_ADHOC) 416 return; 417 418 if (mac->link_state != MAC80211_LINKED) 419 return; 420 421 mutex_lock(&rtlpriv->locks.lps_mutex); 422 423 /* Don't need to check (ppsc->dot11_psmode == EACTIVE), because 424 * bt_ccoexist may ask to enter lps. 425 * In normal case, this constraint move to rtl_lps_set_psmode(). 426 */ 427 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD, 428 "Enter 802.11 power save mode...\n"); 429 rtl_lps_set_psmode(hw, EAUTOPS); 430 431 mutex_unlock(&rtlpriv->locks.lps_mutex); 432 } 433 434 /* Interrupt safe routine to leave the leisure power save mode.*/ 435 static void rtl_lps_leave_core(struct ieee80211_hw *hw) 436 { 437 struct rtl_priv *rtlpriv = rtl_priv(hw); 438 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw)); 439 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw)); 440 441 mutex_lock(&rtlpriv->locks.lps_mutex); 442 443 if (ppsc->fwctrl_lps) { 444 if (ppsc->dot11_psmode != EACTIVE) { 445 446 /*FIX ME */ 447 /*rtlpriv->cfg->ops->enable_interrupt(hw); */ 448 449 if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM && 450 RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM) && 451 rtlhal->interface == INTF_PCI) { 452 rtlpriv->intf_ops->disable_aspm(hw); 453 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM); 454 } 455 456 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD, 457 "Busy Traffic,Leave 802.11 power save..\n"); 458 459 rtl_lps_set_psmode(hw, EACTIVE); 460 } 461 } 462 mutex_unlock(&rtlpriv->locks.lps_mutex); 463 } 464 465 /* For sw LPS*/ 466 void rtl_swlps_beacon(struct ieee80211_hw *hw, void *data, unsigned int len) 467 { 468 struct rtl_priv *rtlpriv = rtl_priv(hw); 469 struct rtl_mac *mac = rtl_mac(rtl_priv(hw)); 470 struct ieee80211_hdr *hdr = data; 471 struct ieee80211_tim_ie *tim_ie; 472 u8 *tim; 473 u8 tim_len; 474 bool u_buffed; 475 bool m_buffed; 476 477 if (mac->opmode != NL80211_IFTYPE_STATION) 478 return; 479 480 if (!rtlpriv->psc.swctrl_lps) 481 return; 482 483 if (rtlpriv->mac80211.link_state != MAC80211_LINKED) 484 return; 485 486 if (!rtlpriv->psc.sw_ps_enabled) 487 return; 488 489 if (rtlpriv->psc.fwctrl_lps) 490 return; 491 492 if (likely(!(hw->conf.flags & IEEE80211_CONF_PS))) 493 return; 494 495 /* check if this really is a beacon */ 496 if (!ieee80211_is_beacon(hdr->frame_control)) 497 return; 498 499 /* min. beacon length + FCS_LEN */ 500 if (len <= 40 + FCS_LEN) 501 return; 502 503 /* and only beacons from the associated BSSID, please */ 504 if (!ether_addr_equal_64bits(hdr->addr3, rtlpriv->mac80211.bssid)) 505 return; 506 507 rtlpriv->psc.last_beacon = jiffies; 508 509 tim = rtl_find_ie(data, len - FCS_LEN, WLAN_EID_TIM); 510 if (!tim) 511 return; 512 513 if (tim[1] < sizeof(*tim_ie)) 514 return; 515 516 tim_len = tim[1]; 517 tim_ie = (struct ieee80211_tim_ie *) &tim[2]; 518 519 if (!WARN_ON_ONCE(!hw->conf.ps_dtim_period)) 520 rtlpriv->psc.dtim_counter = tim_ie->dtim_count; 521 522 /* Check whenever the PHY can be turned off again. */ 523 524 /* 1. What about buffered unicast traffic for our AID? */ 525 u_buffed = ieee80211_check_tim(tim_ie, tim_len, 526 rtlpriv->mac80211.assoc_id); 527 528 /* 2. Maybe the AP wants to send multicast/broadcast data? */ 529 m_buffed = tim_ie->bitmap_ctrl & 0x01; 530 rtlpriv->psc.multi_buffered = m_buffed; 531 532 /* unicast will process by mac80211 through 533 * set ~IEEE80211_CONF_PS, So we just check 534 * multicast frames here */ 535 if (!m_buffed) { 536 /* back to low-power land. and delay is 537 * prevent null power save frame tx fail */ 538 queue_delayed_work(rtlpriv->works.rtl_wq, 539 &rtlpriv->works.ps_work, MSECS(5)); 540 } else { 541 RT_TRACE(rtlpriv, COMP_POWER, DBG_DMESG, 542 "u_bufferd: %x, m_buffered: %x\n", u_buffed, m_buffed); 543 } 544 } 545 EXPORT_SYMBOL_GPL(rtl_swlps_beacon); 546 547 void rtl_swlps_rf_awake(struct ieee80211_hw *hw) 548 { 549 struct rtl_priv *rtlpriv = rtl_priv(hw); 550 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw)); 551 struct rtl_mac *mac = rtl_mac(rtl_priv(hw)); 552 553 if (!rtlpriv->psc.swctrl_lps) 554 return; 555 if (mac->link_state != MAC80211_LINKED) 556 return; 557 558 if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM && 559 RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) { 560 rtlpriv->intf_ops->disable_aspm(hw); 561 RT_CLEAR_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM); 562 } 563 564 mutex_lock(&rtlpriv->locks.lps_mutex); 565 rtl_ps_set_rf_state(hw, ERFON, RF_CHANGE_BY_PS); 566 mutex_unlock(&rtlpriv->locks.lps_mutex); 567 } 568 569 void rtl_swlps_rfon_wq_callback(void *data) 570 { 571 struct rtl_works *rtlworks = 572 container_of_dwork_rtl(data, struct rtl_works, ps_rfon_wq); 573 struct ieee80211_hw *hw = rtlworks->hw; 574 575 rtl_swlps_rf_awake(hw); 576 } 577 578 void rtl_swlps_rf_sleep(struct ieee80211_hw *hw) 579 { 580 struct rtl_priv *rtlpriv = rtl_priv(hw); 581 struct rtl_mac *mac = rtl_mac(rtl_priv(hw)); 582 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw)); 583 u8 sleep_intv; 584 585 if (!rtlpriv->psc.sw_ps_enabled) 586 return; 587 588 if ((rtlpriv->sec.being_setkey) || 589 (mac->opmode == NL80211_IFTYPE_ADHOC)) 590 return; 591 592 /*sleep after linked 10s, to let DHCP and 4-way handshake ok enough!! */ 593 if ((mac->link_state != MAC80211_LINKED) || (mac->cnt_after_linked < 5)) 594 return; 595 596 if (rtlpriv->link_info.busytraffic) 597 return; 598 599 spin_lock(&rtlpriv->locks.rf_ps_lock); 600 if (rtlpriv->psc.rfchange_inprogress) { 601 spin_unlock(&rtlpriv->locks.rf_ps_lock); 602 return; 603 } 604 spin_unlock(&rtlpriv->locks.rf_ps_lock); 605 606 mutex_lock(&rtlpriv->locks.lps_mutex); 607 rtl_ps_set_rf_state(hw, ERFSLEEP, RF_CHANGE_BY_PS); 608 mutex_unlock(&rtlpriv->locks.lps_mutex); 609 610 if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_ASPM && 611 !RT_IN_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM)) { 612 rtlpriv->intf_ops->enable_aspm(hw); 613 RT_SET_PS_LEVEL(ppsc, RT_PS_LEVEL_ASPM); 614 } 615 616 /* here is power save alg, when this beacon is DTIM 617 * we will set sleep time to dtim_period * n; 618 * when this beacon is not DTIM, we will set sleep 619 * time to sleep_intv = rtlpriv->psc.dtim_counter or 620 * MAX_SW_LPS_SLEEP_INTV(default set to 5) */ 621 622 if (rtlpriv->psc.dtim_counter == 0) { 623 if (hw->conf.ps_dtim_period == 1) 624 sleep_intv = hw->conf.ps_dtim_period * 2; 625 else 626 sleep_intv = hw->conf.ps_dtim_period; 627 } else { 628 sleep_intv = rtlpriv->psc.dtim_counter; 629 } 630 631 if (sleep_intv > MAX_SW_LPS_SLEEP_INTV) 632 sleep_intv = MAX_SW_LPS_SLEEP_INTV; 633 634 /* this print should always be dtim_conter = 0 & 635 * sleep = dtim_period, that meaons, we should 636 * awake before every dtim */ 637 RT_TRACE(rtlpriv, COMP_POWER, DBG_DMESG, 638 "dtim_counter:%x will sleep :%d beacon_intv\n", 639 rtlpriv->psc.dtim_counter, sleep_intv); 640 641 /* we tested that 40ms is enough for sw & hw sw delay */ 642 queue_delayed_work(rtlpriv->works.rtl_wq, &rtlpriv->works.ps_rfon_wq, 643 MSECS(sleep_intv * mac->vif->bss_conf.beacon_int - 40)); 644 } 645 646 void rtl_lps_change_work_callback(struct work_struct *work) 647 { 648 struct rtl_works *rtlworks = 649 container_of(work, struct rtl_works, lps_change_work); 650 struct ieee80211_hw *hw = rtlworks->hw; 651 struct rtl_priv *rtlpriv = rtl_priv(hw); 652 653 if (rtlpriv->enter_ps) 654 rtl_lps_enter_core(hw); 655 else 656 rtl_lps_leave_core(hw); 657 } 658 EXPORT_SYMBOL_GPL(rtl_lps_change_work_callback); 659 660 void rtl_lps_enter(struct ieee80211_hw *hw) 661 { 662 struct rtl_priv *rtlpriv = rtl_priv(hw); 663 664 if (!in_interrupt()) 665 return rtl_lps_enter_core(hw); 666 rtlpriv->enter_ps = true; 667 schedule_work(&rtlpriv->works.lps_change_work); 668 } 669 EXPORT_SYMBOL_GPL(rtl_lps_enter); 670 671 void rtl_lps_leave(struct ieee80211_hw *hw) 672 { 673 struct rtl_priv *rtlpriv = rtl_priv(hw); 674 675 if (!in_interrupt()) 676 return rtl_lps_leave_core(hw); 677 rtlpriv->enter_ps = false; 678 schedule_work(&rtlpriv->works.lps_change_work); 679 } 680 EXPORT_SYMBOL_GPL(rtl_lps_leave); 681 682 void rtl_swlps_wq_callback(void *data) 683 { 684 struct rtl_works *rtlworks = container_of_dwork_rtl(data, 685 struct rtl_works, 686 ps_work); 687 struct ieee80211_hw *hw = rtlworks->hw; 688 struct rtl_priv *rtlpriv = rtl_priv(hw); 689 bool ps = false; 690 691 ps = (hw->conf.flags & IEEE80211_CONF_PS); 692 693 /* we can sleep after ps null send ok */ 694 if (rtlpriv->psc.state_inap) { 695 rtl_swlps_rf_sleep(hw); 696 697 if (rtlpriv->psc.state && !ps) { 698 rtlpriv->psc.sleep_ms = jiffies_to_msecs(jiffies - 699 rtlpriv->psc.last_action); 700 } 701 702 if (ps) 703 rtlpriv->psc.last_slept = jiffies; 704 705 rtlpriv->psc.last_action = jiffies; 706 rtlpriv->psc.state = ps; 707 } 708 } 709 710 static void rtl_p2p_noa_ie(struct ieee80211_hw *hw, void *data, 711 unsigned int len) 712 { 713 struct rtl_priv *rtlpriv = rtl_priv(hw); 714 struct ieee80211_mgmt *mgmt = data; 715 struct rtl_p2p_ps_info *p2pinfo = &(rtlpriv->psc.p2p_ps_info); 716 u8 *pos, *end, *ie; 717 u16 noa_len; 718 static u8 p2p_oui_ie_type[4] = {0x50, 0x6f, 0x9a, 0x09}; 719 u8 noa_num, index , i, noa_index = 0; 720 bool find_p2p_ie = false , find_p2p_ps_ie = false; 721 722 pos = (u8 *)mgmt->u.beacon.variable; 723 end = data + len; 724 ie = NULL; 725 726 while (pos + 1 < end) { 727 if (pos + 2 + pos[1] > end) 728 return; 729 730 if (pos[0] == 221 && pos[1] > 4) { 731 if (memcmp(&pos[2], p2p_oui_ie_type, 4) == 0) { 732 ie = pos + 2+4; 733 break; 734 } 735 } 736 pos += 2 + pos[1]; 737 } 738 739 if (ie == NULL) 740 return; 741 find_p2p_ie = true; 742 /*to find noa ie*/ 743 while (ie + 1 < end) { 744 noa_len = READEF2BYTE((__le16 *)&ie[1]); 745 if (ie + 3 + ie[1] > end) 746 return; 747 748 if (ie[0] == 12) { 749 find_p2p_ps_ie = true; 750 if ((noa_len - 2) % 13 != 0) { 751 RT_TRACE(rtlpriv, COMP_INIT, DBG_LOUD, 752 "P2P notice of absence: invalid length.%d\n", 753 noa_len); 754 return; 755 } else { 756 noa_num = (noa_len - 2) / 13; 757 if (noa_num > P2P_MAX_NOA_NUM) 758 noa_num = P2P_MAX_NOA_NUM; 759 760 } 761 noa_index = ie[3]; 762 if (rtlpriv->psc.p2p_ps_info.p2p_ps_mode == 763 P2P_PS_NONE || noa_index != p2pinfo->noa_index) { 764 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, 765 "update NOA ie.\n"); 766 p2pinfo->noa_index = noa_index; 767 p2pinfo->opp_ps = (ie[4] >> 7); 768 p2pinfo->ctwindow = ie[4] & 0x7F; 769 p2pinfo->noa_num = noa_num; 770 index = 5; 771 for (i = 0; i < noa_num; i++) { 772 p2pinfo->noa_count_type[i] = 773 READEF1BYTE(ie+index); 774 index += 1; 775 p2pinfo->noa_duration[i] = 776 READEF4BYTE((__le32 *)ie+index); 777 index += 4; 778 p2pinfo->noa_interval[i] = 779 READEF4BYTE((__le32 *)ie+index); 780 index += 4; 781 p2pinfo->noa_start_time[i] = 782 READEF4BYTE((__le32 *)ie+index); 783 index += 4; 784 } 785 786 if (p2pinfo->opp_ps == 1) { 787 p2pinfo->p2p_ps_mode = P2P_PS_CTWINDOW; 788 /* Driver should wait LPS entering 789 * CTWindow 790 */ 791 if (rtlpriv->psc.fw_current_inpsmode) 792 rtl_p2p_ps_cmd(hw, 793 P2P_PS_ENABLE); 794 } else if (p2pinfo->noa_num > 0) { 795 p2pinfo->p2p_ps_mode = P2P_PS_NOA; 796 rtl_p2p_ps_cmd(hw, P2P_PS_ENABLE); 797 } else if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) { 798 rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE); 799 } 800 } 801 break; 802 } 803 ie += 3 + noa_len; 804 } 805 806 if (find_p2p_ie == true) { 807 if ((p2pinfo->p2p_ps_mode > P2P_PS_NONE) && 808 (find_p2p_ps_ie == false)) 809 rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE); 810 } 811 } 812 813 static void rtl_p2p_action_ie(struct ieee80211_hw *hw, void *data, 814 unsigned int len) 815 { 816 struct rtl_priv *rtlpriv = rtl_priv(hw); 817 struct ieee80211_mgmt *mgmt = data; 818 struct rtl_p2p_ps_info *p2pinfo = &(rtlpriv->psc.p2p_ps_info); 819 u8 noa_num, index , i , noa_index = 0; 820 u8 *pos, *end, *ie; 821 u16 noa_len; 822 static u8 p2p_oui_ie_type[4] = {0x50, 0x6f, 0x9a, 0x09}; 823 824 pos = (u8 *)&mgmt->u.action.category; 825 end = data + len; 826 ie = NULL; 827 828 if (pos[0] == 0x7f) { 829 if (memcmp(&pos[1], p2p_oui_ie_type, 4) == 0) 830 ie = pos + 3+4; 831 } 832 833 if (ie == NULL) 834 return; 835 836 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, "action frame find P2P IE.\n"); 837 /*to find noa ie*/ 838 while (ie + 1 < end) { 839 noa_len = READEF2BYTE((__le16 *)&ie[1]); 840 if (ie + 3 + ie[1] > end) 841 return; 842 843 if (ie[0] == 12) { 844 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, "find NOA IE.\n"); 845 RT_PRINT_DATA(rtlpriv, COMP_FW, DBG_LOUD, "noa ie ", 846 ie, noa_len); 847 if ((noa_len - 2) % 13 != 0) { 848 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, 849 "P2P notice of absence: invalid length.%d\n", 850 noa_len); 851 return; 852 } else { 853 noa_num = (noa_len - 2) / 13; 854 if (noa_num > P2P_MAX_NOA_NUM) 855 noa_num = P2P_MAX_NOA_NUM; 856 857 } 858 noa_index = ie[3]; 859 if (rtlpriv->psc.p2p_ps_info.p2p_ps_mode == 860 P2P_PS_NONE || noa_index != p2pinfo->noa_index) { 861 p2pinfo->noa_index = noa_index; 862 p2pinfo->opp_ps = (ie[4] >> 7); 863 p2pinfo->ctwindow = ie[4] & 0x7F; 864 p2pinfo->noa_num = noa_num; 865 index = 5; 866 for (i = 0; i < noa_num; i++) { 867 p2pinfo->noa_count_type[i] = 868 READEF1BYTE(ie+index); 869 index += 1; 870 p2pinfo->noa_duration[i] = 871 READEF4BYTE((__le32 *)ie+index); 872 index += 4; 873 p2pinfo->noa_interval[i] = 874 READEF4BYTE((__le32 *)ie+index); 875 index += 4; 876 p2pinfo->noa_start_time[i] = 877 READEF4BYTE((__le32 *)ie+index); 878 index += 4; 879 } 880 881 if (p2pinfo->opp_ps == 1) { 882 p2pinfo->p2p_ps_mode = P2P_PS_CTWINDOW; 883 /* Driver should wait LPS entering 884 * CTWindow 885 */ 886 if (rtlpriv->psc.fw_current_inpsmode) 887 rtl_p2p_ps_cmd(hw, 888 P2P_PS_ENABLE); 889 } else if (p2pinfo->noa_num > 0) { 890 p2pinfo->p2p_ps_mode = P2P_PS_NOA; 891 rtl_p2p_ps_cmd(hw, P2P_PS_ENABLE); 892 } else if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) { 893 rtl_p2p_ps_cmd(hw, P2P_PS_DISABLE); 894 } 895 } 896 break; 897 } 898 ie += 3 + noa_len; 899 } 900 } 901 902 void rtl_p2p_ps_cmd(struct ieee80211_hw *hw , u8 p2p_ps_state) 903 { 904 struct rtl_priv *rtlpriv = rtl_priv(hw); 905 struct rtl_ps_ctl *rtlps = rtl_psc(rtl_priv(hw)); 906 struct rtl_p2p_ps_info *p2pinfo = &(rtlpriv->psc.p2p_ps_info); 907 908 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, " p2p state %x\n" , p2p_ps_state); 909 switch (p2p_ps_state) { 910 case P2P_PS_DISABLE: 911 p2pinfo->p2p_ps_state = p2p_ps_state; 912 rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_H2C_FW_P2P_PS_OFFLOAD, 913 &p2p_ps_state); 914 p2pinfo->noa_index = 0; 915 p2pinfo->ctwindow = 0; 916 p2pinfo->opp_ps = 0; 917 p2pinfo->noa_num = 0; 918 p2pinfo->p2p_ps_mode = P2P_PS_NONE; 919 if (rtlps->fw_current_inpsmode) { 920 if (rtlps->smart_ps == 0) { 921 rtlps->smart_ps = 2; 922 rtlpriv->cfg->ops->set_hw_reg(hw, 923 HW_VAR_H2C_FW_PWRMODE, 924 &rtlps->pwr_mode); 925 } 926 927 } 928 break; 929 case P2P_PS_ENABLE: 930 if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) { 931 p2pinfo->p2p_ps_state = p2p_ps_state; 932 933 if (p2pinfo->ctwindow > 0) { 934 if (rtlps->smart_ps != 0) { 935 rtlps->smart_ps = 0; 936 rtlpriv->cfg->ops->set_hw_reg(hw, 937 HW_VAR_H2C_FW_PWRMODE, 938 &rtlps->pwr_mode); 939 } 940 } 941 rtlpriv->cfg->ops->set_hw_reg(hw, 942 HW_VAR_H2C_FW_P2P_PS_OFFLOAD, 943 &p2p_ps_state); 944 945 } 946 break; 947 case P2P_PS_SCAN: 948 case P2P_PS_SCAN_DONE: 949 case P2P_PS_ALLSTASLEEP: 950 if (p2pinfo->p2p_ps_mode > P2P_PS_NONE) { 951 p2pinfo->p2p_ps_state = p2p_ps_state; 952 rtlpriv->cfg->ops->set_hw_reg(hw, 953 HW_VAR_H2C_FW_P2P_PS_OFFLOAD, 954 &p2p_ps_state); 955 } 956 break; 957 default: 958 break; 959 } 960 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, 961 "ctwindow %x oppps %x\n", 962 p2pinfo->ctwindow , p2pinfo->opp_ps); 963 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, 964 "count %x duration %x index %x interval %x start time %x noa num %x\n", 965 p2pinfo->noa_count_type[0], 966 p2pinfo->noa_duration[0], 967 p2pinfo->noa_index, 968 p2pinfo->noa_interval[0], 969 p2pinfo->noa_start_time[0], 970 p2pinfo->noa_num); 971 RT_TRACE(rtlpriv, COMP_FW, DBG_LOUD, "end\n"); 972 } 973 974 void rtl_p2p_info(struct ieee80211_hw *hw, void *data, unsigned int len) 975 { 976 struct rtl_priv *rtlpriv = rtl_priv(hw); 977 struct rtl_mac *mac = rtl_mac(rtl_priv(hw)); 978 struct ieee80211_hdr *hdr = data; 979 980 if (!mac->p2p) 981 return; 982 if (mac->link_state != MAC80211_LINKED) 983 return; 984 /* min. beacon length + FCS_LEN */ 985 if (len <= 40 + FCS_LEN) 986 return; 987 988 /* and only beacons from the associated BSSID, please */ 989 if (!ether_addr_equal_64bits(hdr->addr3, rtlpriv->mac80211.bssid)) 990 return; 991 992 /* check if this really is a beacon */ 993 if (!(ieee80211_is_beacon(hdr->frame_control) || 994 ieee80211_is_probe_resp(hdr->frame_control) || 995 ieee80211_is_action(hdr->frame_control))) 996 return; 997 998 if (ieee80211_is_action(hdr->frame_control)) 999 rtl_p2p_action_ie(hw , data , len - FCS_LEN); 1000 else 1001 rtl_p2p_noa_ie(hw , data , len - FCS_LEN); 1002 } 1003 EXPORT_SYMBOL_GPL(rtl_p2p_info); 1004