1 /* 2 * Copyright (c) 2008-2011 Atheros Communications Inc. 3 * 4 * Permission to use, copy, modify, and/or distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 */ 16 17 #include <linux/nl80211.h> 18 #include <linux/delay.h> 19 #include "ath9k.h" 20 #include "btcoex.h" 21 22 u8 ath9k_parse_mpdudensity(u8 mpdudensity) 23 { 24 /* 25 * 802.11n D2.0 defined values for "Minimum MPDU Start Spacing": 26 * 0 for no restriction 27 * 1 for 1/4 us 28 * 2 for 1/2 us 29 * 3 for 1 us 30 * 4 for 2 us 31 * 5 for 4 us 32 * 6 for 8 us 33 * 7 for 16 us 34 */ 35 switch (mpdudensity) { 36 case 0: 37 return 0; 38 case 1: 39 case 2: 40 case 3: 41 /* Our lower layer calculations limit our precision to 42 1 microsecond */ 43 return 1; 44 case 4: 45 return 2; 46 case 5: 47 return 4; 48 case 6: 49 return 8; 50 case 7: 51 return 16; 52 default: 53 return 0; 54 } 55 } 56 57 static bool ath9k_has_pending_frames(struct ath_softc *sc, struct ath_txq *txq, 58 bool sw_pending) 59 { 60 bool pending = false; 61 62 spin_lock_bh(&txq->axq_lock); 63 64 if (txq->axq_depth) { 65 pending = true; 66 goto out; 67 } 68 69 if (!sw_pending) 70 goto out; 71 72 if (txq->mac80211_qnum >= 0) { 73 struct ath_acq *acq; 74 75 acq = &sc->cur_chan->acq[txq->mac80211_qnum]; 76 if (!list_empty(&acq->acq_new) || !list_empty(&acq->acq_old)) 77 pending = true; 78 } 79 out: 80 spin_unlock_bh(&txq->axq_lock); 81 return pending; 82 } 83 84 static bool ath9k_setpower(struct ath_softc *sc, enum ath9k_power_mode mode) 85 { 86 unsigned long flags; 87 bool ret; 88 89 spin_lock_irqsave(&sc->sc_pm_lock, flags); 90 ret = ath9k_hw_setpower(sc->sc_ah, mode); 91 spin_unlock_irqrestore(&sc->sc_pm_lock, flags); 92 93 return ret; 94 } 95 96 void ath_ps_full_sleep(struct timer_list *t) 97 { 98 struct ath_softc *sc = from_timer(sc, t, sleep_timer); 99 struct ath_common *common = ath9k_hw_common(sc->sc_ah); 100 unsigned long flags; 101 bool reset; 102 103 spin_lock_irqsave(&common->cc_lock, flags); 104 ath_hw_cycle_counters_update(common); 105 spin_unlock_irqrestore(&common->cc_lock, flags); 106 107 ath9k_hw_setrxabort(sc->sc_ah, 1); 108 ath9k_hw_stopdmarecv(sc->sc_ah, &reset); 109 110 ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_FULL_SLEEP); 111 } 112 113 void ath9k_ps_wakeup(struct ath_softc *sc) 114 { 115 struct ath_common *common = ath9k_hw_common(sc->sc_ah); 116 unsigned long flags; 117 enum ath9k_power_mode power_mode; 118 119 spin_lock_irqsave(&sc->sc_pm_lock, flags); 120 if (++sc->ps_usecount != 1) 121 goto unlock; 122 123 del_timer_sync(&sc->sleep_timer); 124 power_mode = sc->sc_ah->power_mode; 125 ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_AWAKE); 126 127 /* 128 * While the hardware is asleep, the cycle counters contain no 129 * useful data. Better clear them now so that they don't mess up 130 * survey data results. 131 */ 132 if (power_mode != ATH9K_PM_AWAKE) { 133 spin_lock(&common->cc_lock); 134 ath_hw_cycle_counters_update(common); 135 memset(&common->cc_survey, 0, sizeof(common->cc_survey)); 136 memset(&common->cc_ani, 0, sizeof(common->cc_ani)); 137 spin_unlock(&common->cc_lock); 138 } 139 140 unlock: 141 spin_unlock_irqrestore(&sc->sc_pm_lock, flags); 142 } 143 144 void ath9k_ps_restore(struct ath_softc *sc) 145 { 146 struct ath_common *common = ath9k_hw_common(sc->sc_ah); 147 enum ath9k_power_mode mode; 148 unsigned long flags; 149 150 spin_lock_irqsave(&sc->sc_pm_lock, flags); 151 if (--sc->ps_usecount != 0) 152 goto unlock; 153 154 if (sc->ps_idle) { 155 mod_timer(&sc->sleep_timer, jiffies + HZ / 10); 156 goto unlock; 157 } 158 159 if (sc->ps_enabled && 160 !(sc->ps_flags & (PS_WAIT_FOR_BEACON | 161 PS_WAIT_FOR_CAB | 162 PS_WAIT_FOR_PSPOLL_DATA | 163 PS_WAIT_FOR_TX_ACK | 164 PS_WAIT_FOR_ANI))) { 165 mode = ATH9K_PM_NETWORK_SLEEP; 166 if (ath9k_hw_btcoex_is_enabled(sc->sc_ah)) 167 ath9k_btcoex_stop_gen_timer(sc); 168 } else { 169 goto unlock; 170 } 171 172 spin_lock(&common->cc_lock); 173 ath_hw_cycle_counters_update(common); 174 spin_unlock(&common->cc_lock); 175 176 ath9k_hw_setpower(sc->sc_ah, mode); 177 178 unlock: 179 spin_unlock_irqrestore(&sc->sc_pm_lock, flags); 180 } 181 182 static void __ath_cancel_work(struct ath_softc *sc) 183 { 184 cancel_work_sync(&sc->paprd_work); 185 cancel_delayed_work_sync(&sc->hw_check_work); 186 cancel_delayed_work_sync(&sc->hw_pll_work); 187 188 #ifdef CONFIG_ATH9K_BTCOEX_SUPPORT 189 if (ath9k_hw_mci_is_enabled(sc->sc_ah)) 190 cancel_work_sync(&sc->mci_work); 191 #endif 192 } 193 194 void ath_cancel_work(struct ath_softc *sc) 195 { 196 __ath_cancel_work(sc); 197 cancel_work_sync(&sc->hw_reset_work); 198 } 199 200 void ath_restart_work(struct ath_softc *sc) 201 { 202 ieee80211_queue_delayed_work(sc->hw, &sc->hw_check_work, 203 ATH_HW_CHECK_POLL_INT); 204 205 if (AR_SREV_9340(sc->sc_ah) || AR_SREV_9330(sc->sc_ah)) 206 ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work, 207 msecs_to_jiffies(ATH_PLL_WORK_INTERVAL)); 208 209 ath_start_ani(sc); 210 } 211 212 static bool ath_prepare_reset(struct ath_softc *sc) 213 { 214 struct ath_hw *ah = sc->sc_ah; 215 bool ret = true; 216 217 ieee80211_stop_queues(sc->hw); 218 ath_stop_ani(sc); 219 ath9k_hw_disable_interrupts(ah); 220 221 if (AR_SREV_9300_20_OR_LATER(ah)) { 222 ret &= ath_stoprecv(sc); 223 ret &= ath_drain_all_txq(sc); 224 } else { 225 ret &= ath_drain_all_txq(sc); 226 ret &= ath_stoprecv(sc); 227 } 228 229 return ret; 230 } 231 232 static bool ath_complete_reset(struct ath_softc *sc, bool start) 233 { 234 struct ath_hw *ah = sc->sc_ah; 235 struct ath_common *common = ath9k_hw_common(ah); 236 unsigned long flags; 237 238 ath9k_calculate_summary_state(sc, sc->cur_chan); 239 ath_startrecv(sc); 240 ath9k_cmn_update_txpow(ah, sc->cur_chan->cur_txpower, 241 sc->cur_chan->txpower, 242 &sc->cur_chan->cur_txpower); 243 clear_bit(ATH_OP_HW_RESET, &common->op_flags); 244 245 if (!sc->cur_chan->offchannel && start) { 246 /* restore per chanctx TSF timer */ 247 if (sc->cur_chan->tsf_val) { 248 u32 offset; 249 250 offset = ath9k_hw_get_tsf_offset(&sc->cur_chan->tsf_ts, 251 NULL); 252 ath9k_hw_settsf64(ah, sc->cur_chan->tsf_val + offset); 253 } 254 255 256 if (!test_bit(ATH_OP_BEACONS, &common->op_flags)) 257 goto work; 258 259 if (ah->opmode == NL80211_IFTYPE_STATION && 260 test_bit(ATH_OP_PRIM_STA_VIF, &common->op_flags)) { 261 spin_lock_irqsave(&sc->sc_pm_lock, flags); 262 sc->ps_flags |= PS_BEACON_SYNC | PS_WAIT_FOR_BEACON; 263 spin_unlock_irqrestore(&sc->sc_pm_lock, flags); 264 } else { 265 ath9k_set_beacon(sc); 266 } 267 work: 268 ath_restart_work(sc); 269 ath_txq_schedule_all(sc); 270 } 271 272 sc->gtt_cnt = 0; 273 274 ath9k_hw_set_interrupts(ah); 275 ath9k_hw_enable_interrupts(ah); 276 ieee80211_wake_queues(sc->hw); 277 ath9k_p2p_ps_timer(sc); 278 279 return true; 280 } 281 282 static int ath_reset_internal(struct ath_softc *sc, struct ath9k_channel *hchan) 283 { 284 struct ath_hw *ah = sc->sc_ah; 285 struct ath_common *common = ath9k_hw_common(ah); 286 struct ath9k_hw_cal_data *caldata = NULL; 287 bool fastcc = true; 288 int r; 289 290 __ath_cancel_work(sc); 291 292 disable_irq(sc->irq); 293 tasklet_disable(&sc->intr_tq); 294 tasklet_disable(&sc->bcon_tasklet); 295 spin_lock_bh(&sc->sc_pcu_lock); 296 297 if (!sc->cur_chan->offchannel) { 298 fastcc = false; 299 caldata = &sc->cur_chan->caldata; 300 } 301 302 if (!hchan) { 303 fastcc = false; 304 hchan = ah->curchan; 305 } 306 307 if (!ath_prepare_reset(sc)) 308 fastcc = false; 309 310 if (ath9k_is_chanctx_enabled()) 311 fastcc = false; 312 313 spin_lock_bh(&sc->chan_lock); 314 sc->cur_chandef = sc->cur_chan->chandef; 315 spin_unlock_bh(&sc->chan_lock); 316 317 ath_dbg(common, CONFIG, "Reset to %u MHz, HT40: %d fastcc: %d\n", 318 hchan->channel, IS_CHAN_HT40(hchan), fastcc); 319 320 r = ath9k_hw_reset(ah, hchan, caldata, fastcc); 321 if (r) { 322 ath_err(common, 323 "Unable to reset channel, reset status %d\n", r); 324 325 ath9k_hw_enable_interrupts(ah); 326 ath9k_queue_reset(sc, RESET_TYPE_BB_HANG); 327 328 goto out; 329 } 330 331 if (ath9k_hw_mci_is_enabled(sc->sc_ah) && 332 sc->cur_chan->offchannel) 333 ath9k_mci_set_txpower(sc, true, false); 334 335 if (!ath_complete_reset(sc, true)) 336 r = -EIO; 337 338 out: 339 enable_irq(sc->irq); 340 spin_unlock_bh(&sc->sc_pcu_lock); 341 tasklet_enable(&sc->bcon_tasklet); 342 tasklet_enable(&sc->intr_tq); 343 344 return r; 345 } 346 347 static void ath_node_attach(struct ath_softc *sc, struct ieee80211_sta *sta, 348 struct ieee80211_vif *vif) 349 { 350 struct ath_node *an; 351 an = (struct ath_node *)sta->drv_priv; 352 353 an->sc = sc; 354 an->sta = sta; 355 an->vif = vif; 356 memset(&an->key_idx, 0, sizeof(an->key_idx)); 357 358 ath_tx_node_init(sc, an); 359 360 ath_dynack_node_init(sc->sc_ah, an); 361 } 362 363 static void ath_node_detach(struct ath_softc *sc, struct ieee80211_sta *sta) 364 { 365 struct ath_node *an = (struct ath_node *)sta->drv_priv; 366 ath_tx_node_cleanup(sc, an); 367 368 ath_dynack_node_deinit(sc->sc_ah, an); 369 } 370 371 void ath9k_tasklet(unsigned long data) 372 { 373 struct ath_softc *sc = (struct ath_softc *)data; 374 struct ath_hw *ah = sc->sc_ah; 375 struct ath_common *common = ath9k_hw_common(ah); 376 enum ath_reset_type type; 377 unsigned long flags; 378 u32 status; 379 u32 rxmask; 380 381 spin_lock_irqsave(&sc->intr_lock, flags); 382 status = sc->intrstatus; 383 sc->intrstatus = 0; 384 spin_unlock_irqrestore(&sc->intr_lock, flags); 385 386 ath9k_ps_wakeup(sc); 387 spin_lock(&sc->sc_pcu_lock); 388 389 if (status & ATH9K_INT_FATAL) { 390 type = RESET_TYPE_FATAL_INT; 391 ath9k_queue_reset(sc, type); 392 ath_dbg(common, RESET, "FATAL: Skipping interrupts\n"); 393 goto out; 394 } 395 396 if ((ah->config.hw_hang_checks & HW_BB_WATCHDOG) && 397 (status & ATH9K_INT_BB_WATCHDOG)) { 398 spin_lock_irqsave(&common->cc_lock, flags); 399 ath_hw_cycle_counters_update(common); 400 ar9003_hw_bb_watchdog_dbg_info(ah); 401 spin_unlock_irqrestore(&common->cc_lock, flags); 402 403 if (ar9003_hw_bb_watchdog_check(ah)) { 404 type = RESET_TYPE_BB_WATCHDOG; 405 ath9k_queue_reset(sc, type); 406 407 ath_dbg(common, RESET, 408 "BB_WATCHDOG: Skipping interrupts\n"); 409 goto out; 410 } 411 } 412 413 if (status & ATH9K_INT_GTT) { 414 sc->gtt_cnt++; 415 416 if ((sc->gtt_cnt >= MAX_GTT_CNT) && !ath9k_hw_check_alive(ah)) { 417 type = RESET_TYPE_TX_GTT; 418 ath9k_queue_reset(sc, type); 419 ath_dbg(common, RESET, 420 "GTT: Skipping interrupts\n"); 421 goto out; 422 } 423 } 424 425 spin_lock_irqsave(&sc->sc_pm_lock, flags); 426 if ((status & ATH9K_INT_TSFOOR) && sc->ps_enabled) { 427 /* 428 * TSF sync does not look correct; remain awake to sync with 429 * the next Beacon. 430 */ 431 ath_dbg(common, PS, "TSFOOR - Sync with next Beacon\n"); 432 sc->ps_flags |= PS_WAIT_FOR_BEACON | PS_BEACON_SYNC; 433 } 434 spin_unlock_irqrestore(&sc->sc_pm_lock, flags); 435 436 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) 437 rxmask = (ATH9K_INT_RXHP | ATH9K_INT_RXLP | ATH9K_INT_RXEOL | 438 ATH9K_INT_RXORN); 439 else 440 rxmask = (ATH9K_INT_RX | ATH9K_INT_RXEOL | ATH9K_INT_RXORN); 441 442 if (status & rxmask) { 443 /* Check for high priority Rx first */ 444 if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) && 445 (status & ATH9K_INT_RXHP)) 446 ath_rx_tasklet(sc, 0, true); 447 448 ath_rx_tasklet(sc, 0, false); 449 } 450 451 if (status & ATH9K_INT_TX) { 452 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) { 453 /* 454 * For EDMA chips, TX completion is enabled for the 455 * beacon queue, so if a beacon has been transmitted 456 * successfully after a GTT interrupt, the GTT counter 457 * gets reset to zero here. 458 */ 459 sc->gtt_cnt = 0; 460 461 ath_tx_edma_tasklet(sc); 462 } else { 463 ath_tx_tasklet(sc); 464 } 465 466 wake_up(&sc->tx_wait); 467 } 468 469 if (status & ATH9K_INT_GENTIMER) 470 ath_gen_timer_isr(sc->sc_ah); 471 472 ath9k_btcoex_handle_interrupt(sc, status); 473 474 /* re-enable hardware interrupt */ 475 ath9k_hw_resume_interrupts(ah); 476 out: 477 spin_unlock(&sc->sc_pcu_lock); 478 ath9k_ps_restore(sc); 479 } 480 481 irqreturn_t ath_isr(int irq, void *dev) 482 { 483 #define SCHED_INTR ( \ 484 ATH9K_INT_FATAL | \ 485 ATH9K_INT_BB_WATCHDOG | \ 486 ATH9K_INT_RXORN | \ 487 ATH9K_INT_RXEOL | \ 488 ATH9K_INT_RX | \ 489 ATH9K_INT_RXLP | \ 490 ATH9K_INT_RXHP | \ 491 ATH9K_INT_TX | \ 492 ATH9K_INT_BMISS | \ 493 ATH9K_INT_CST | \ 494 ATH9K_INT_GTT | \ 495 ATH9K_INT_TSFOOR | \ 496 ATH9K_INT_GENTIMER | \ 497 ATH9K_INT_MCI) 498 499 struct ath_softc *sc = dev; 500 struct ath_hw *ah = sc->sc_ah; 501 struct ath_common *common = ath9k_hw_common(ah); 502 enum ath9k_int status; 503 u32 sync_cause = 0; 504 bool sched = false; 505 506 /* 507 * The hardware is not ready/present, don't 508 * touch anything. Note this can happen early 509 * on if the IRQ is shared. 510 */ 511 if (!ah || test_bit(ATH_OP_INVALID, &common->op_flags)) 512 return IRQ_NONE; 513 514 /* shared irq, not for us */ 515 if (!ath9k_hw_intrpend(ah)) 516 return IRQ_NONE; 517 518 /* 519 * Figure out the reason(s) for the interrupt. Note 520 * that the hal returns a pseudo-ISR that may include 521 * bits we haven't explicitly enabled so we mask the 522 * value to insure we only process bits we requested. 523 */ 524 ath9k_hw_getisr(ah, &status, &sync_cause); /* NB: clears ISR too */ 525 ath9k_debug_sync_cause(sc, sync_cause); 526 status &= ah->imask; /* discard unasked-for bits */ 527 528 if (test_bit(ATH_OP_HW_RESET, &common->op_flags)) 529 return IRQ_HANDLED; 530 531 /* 532 * If there are no status bits set, then this interrupt was not 533 * for me (should have been caught above). 534 */ 535 if (!status) 536 return IRQ_NONE; 537 538 /* Cache the status */ 539 spin_lock(&sc->intr_lock); 540 sc->intrstatus |= status; 541 spin_unlock(&sc->intr_lock); 542 543 if (status & SCHED_INTR) 544 sched = true; 545 546 /* 547 * If a FATAL interrupt is received, we have to reset the chip 548 * immediately. 549 */ 550 if (status & ATH9K_INT_FATAL) 551 goto chip_reset; 552 553 if ((ah->config.hw_hang_checks & HW_BB_WATCHDOG) && 554 (status & ATH9K_INT_BB_WATCHDOG)) 555 goto chip_reset; 556 557 if (status & ATH9K_INT_SWBA) 558 tasklet_schedule(&sc->bcon_tasklet); 559 560 if (status & ATH9K_INT_TXURN) 561 ath9k_hw_updatetxtriglevel(ah, true); 562 563 if (status & ATH9K_INT_RXEOL) { 564 ah->imask &= ~(ATH9K_INT_RXEOL | ATH9K_INT_RXORN); 565 ath9k_hw_set_interrupts(ah); 566 } 567 568 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) 569 if (status & ATH9K_INT_TIM_TIMER) { 570 if (ATH_DBG_WARN_ON_ONCE(sc->ps_idle)) 571 goto chip_reset; 572 /* Clear RxAbort bit so that we can 573 * receive frames */ 574 ath9k_setpower(sc, ATH9K_PM_AWAKE); 575 spin_lock(&sc->sc_pm_lock); 576 ath9k_hw_setrxabort(sc->sc_ah, 0); 577 sc->ps_flags |= PS_WAIT_FOR_BEACON; 578 spin_unlock(&sc->sc_pm_lock); 579 } 580 581 chip_reset: 582 583 ath_debug_stat_interrupt(sc, status); 584 585 if (sched) { 586 /* turn off every interrupt */ 587 ath9k_hw_kill_interrupts(ah); 588 tasklet_schedule(&sc->intr_tq); 589 } 590 591 return IRQ_HANDLED; 592 593 #undef SCHED_INTR 594 } 595 596 /* 597 * This function is called when a HW reset cannot be deferred 598 * and has to be immediate. 599 */ 600 int ath_reset(struct ath_softc *sc, struct ath9k_channel *hchan) 601 { 602 struct ath_common *common = ath9k_hw_common(sc->sc_ah); 603 int r; 604 605 ath9k_hw_kill_interrupts(sc->sc_ah); 606 set_bit(ATH_OP_HW_RESET, &common->op_flags); 607 608 ath9k_ps_wakeup(sc); 609 r = ath_reset_internal(sc, hchan); 610 ath9k_ps_restore(sc); 611 612 return r; 613 } 614 615 /* 616 * When a HW reset can be deferred, it is added to the 617 * hw_reset_work workqueue, but we set ATH_OP_HW_RESET before 618 * queueing. 619 */ 620 void ath9k_queue_reset(struct ath_softc *sc, enum ath_reset_type type) 621 { 622 struct ath_common *common = ath9k_hw_common(sc->sc_ah); 623 #ifdef CONFIG_ATH9K_DEBUGFS 624 RESET_STAT_INC(sc, type); 625 #endif 626 ath9k_hw_kill_interrupts(sc->sc_ah); 627 set_bit(ATH_OP_HW_RESET, &common->op_flags); 628 ieee80211_queue_work(sc->hw, &sc->hw_reset_work); 629 } 630 631 void ath_reset_work(struct work_struct *work) 632 { 633 struct ath_softc *sc = container_of(work, struct ath_softc, hw_reset_work); 634 635 ath9k_ps_wakeup(sc); 636 ath_reset_internal(sc, NULL); 637 ath9k_ps_restore(sc); 638 } 639 640 /**********************/ 641 /* mac80211 callbacks */ 642 /**********************/ 643 644 static int ath9k_start(struct ieee80211_hw *hw) 645 { 646 struct ath_softc *sc = hw->priv; 647 struct ath_hw *ah = sc->sc_ah; 648 struct ath_common *common = ath9k_hw_common(ah); 649 struct ieee80211_channel *curchan = sc->cur_chan->chandef.chan; 650 struct ath_chanctx *ctx = sc->cur_chan; 651 struct ath9k_channel *init_channel; 652 int r; 653 654 ath_dbg(common, CONFIG, 655 "Starting driver with initial channel: %d MHz\n", 656 curchan->center_freq); 657 658 ath9k_ps_wakeup(sc); 659 mutex_lock(&sc->mutex); 660 661 init_channel = ath9k_cmn_get_channel(hw, ah, &ctx->chandef); 662 sc->cur_chandef = hw->conf.chandef; 663 664 /* Reset SERDES registers */ 665 ath9k_hw_configpcipowersave(ah, false); 666 667 /* 668 * The basic interface to setting the hardware in a good 669 * state is ``reset''. On return the hardware is known to 670 * be powered up and with interrupts disabled. This must 671 * be followed by initialization of the appropriate bits 672 * and then setup of the interrupt mask. 673 */ 674 spin_lock_bh(&sc->sc_pcu_lock); 675 676 atomic_set(&ah->intr_ref_cnt, -1); 677 678 r = ath9k_hw_reset(ah, init_channel, ah->caldata, false); 679 if (r) { 680 ath_err(common, 681 "Unable to reset hardware; reset status %d (freq %u MHz)\n", 682 r, curchan->center_freq); 683 ah->reset_power_on = false; 684 } 685 686 /* Setup our intr mask. */ 687 ah->imask = ATH9K_INT_TX | ATH9K_INT_RXEOL | 688 ATH9K_INT_RXORN | ATH9K_INT_FATAL | 689 ATH9K_INT_GLOBAL; 690 691 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) 692 ah->imask |= ATH9K_INT_RXHP | 693 ATH9K_INT_RXLP; 694 else 695 ah->imask |= ATH9K_INT_RX; 696 697 if (ah->config.hw_hang_checks & HW_BB_WATCHDOG) 698 ah->imask |= ATH9K_INT_BB_WATCHDOG; 699 700 /* 701 * Enable GTT interrupts only for AR9003/AR9004 chips 702 * for now. 703 */ 704 if (AR_SREV_9300_20_OR_LATER(ah)) 705 ah->imask |= ATH9K_INT_GTT; 706 707 if (ah->caps.hw_caps & ATH9K_HW_CAP_HT) 708 ah->imask |= ATH9K_INT_CST; 709 710 ath_mci_enable(sc); 711 712 clear_bit(ATH_OP_INVALID, &common->op_flags); 713 sc->sc_ah->is_monitoring = false; 714 715 if (!ath_complete_reset(sc, false)) 716 ah->reset_power_on = false; 717 718 if (ah->led_pin >= 0) { 719 ath9k_hw_set_gpio(ah, ah->led_pin, 720 (ah->config.led_active_high) ? 1 : 0); 721 ath9k_hw_gpio_request_out(ah, ah->led_pin, NULL, 722 AR_GPIO_OUTPUT_MUX_AS_OUTPUT); 723 } 724 725 /* 726 * Reset key cache to sane defaults (all entries cleared) instead of 727 * semi-random values after suspend/resume. 728 */ 729 ath9k_cmn_init_crypto(sc->sc_ah); 730 731 ath9k_hw_reset_tsf(ah); 732 733 spin_unlock_bh(&sc->sc_pcu_lock); 734 735 ath9k_rng_start(sc); 736 737 mutex_unlock(&sc->mutex); 738 739 ath9k_ps_restore(sc); 740 741 return 0; 742 } 743 744 static void ath9k_tx(struct ieee80211_hw *hw, 745 struct ieee80211_tx_control *control, 746 struct sk_buff *skb) 747 { 748 struct ath_softc *sc = hw->priv; 749 struct ath_common *common = ath9k_hw_common(sc->sc_ah); 750 struct ath_tx_control txctl; 751 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 752 unsigned long flags; 753 754 if (sc->ps_enabled) { 755 /* 756 * mac80211 does not set PM field for normal data frames, so we 757 * need to update that based on the current PS mode. 758 */ 759 if (ieee80211_is_data(hdr->frame_control) && 760 !ieee80211_is_nullfunc(hdr->frame_control) && 761 !ieee80211_has_pm(hdr->frame_control)) { 762 ath_dbg(common, PS, 763 "Add PM=1 for a TX frame while in PS mode\n"); 764 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 765 } 766 } 767 768 if (unlikely(sc->sc_ah->power_mode == ATH9K_PM_NETWORK_SLEEP)) { 769 /* 770 * We are using PS-Poll and mac80211 can request TX while in 771 * power save mode. Need to wake up hardware for the TX to be 772 * completed and if needed, also for RX of buffered frames. 773 */ 774 ath9k_ps_wakeup(sc); 775 spin_lock_irqsave(&sc->sc_pm_lock, flags); 776 if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) 777 ath9k_hw_setrxabort(sc->sc_ah, 0); 778 if (ieee80211_is_pspoll(hdr->frame_control)) { 779 ath_dbg(common, PS, 780 "Sending PS-Poll to pick a buffered frame\n"); 781 sc->ps_flags |= PS_WAIT_FOR_PSPOLL_DATA; 782 } else { 783 ath_dbg(common, PS, "Wake up to complete TX\n"); 784 sc->ps_flags |= PS_WAIT_FOR_TX_ACK; 785 } 786 /* 787 * The actual restore operation will happen only after 788 * the ps_flags bit is cleared. We are just dropping 789 * the ps_usecount here. 790 */ 791 spin_unlock_irqrestore(&sc->sc_pm_lock, flags); 792 ath9k_ps_restore(sc); 793 } 794 795 /* 796 * Cannot tx while the hardware is in full sleep, it first needs a full 797 * chip reset to recover from that 798 */ 799 if (unlikely(sc->sc_ah->power_mode == ATH9K_PM_FULL_SLEEP)) { 800 ath_err(common, "TX while HW is in FULL_SLEEP mode\n"); 801 goto exit; 802 } 803 804 memset(&txctl, 0, sizeof(struct ath_tx_control)); 805 txctl.txq = sc->tx.txq_map[skb_get_queue_mapping(skb)]; 806 txctl.sta = control->sta; 807 808 ath_dbg(common, XMIT, "transmitting packet, skb: %p\n", skb); 809 810 if (ath_tx_start(hw, skb, &txctl) != 0) { 811 ath_dbg(common, XMIT, "TX failed\n"); 812 TX_STAT_INC(txctl.txq->axq_qnum, txfailed); 813 goto exit; 814 } 815 816 return; 817 exit: 818 ieee80211_free_txskb(hw, skb); 819 } 820 821 static void ath9k_stop(struct ieee80211_hw *hw) 822 { 823 struct ath_softc *sc = hw->priv; 824 struct ath_hw *ah = sc->sc_ah; 825 struct ath_common *common = ath9k_hw_common(ah); 826 bool prev_idle; 827 828 ath9k_deinit_channel_context(sc); 829 830 mutex_lock(&sc->mutex); 831 832 ath9k_rng_stop(sc); 833 834 ath_cancel_work(sc); 835 836 if (test_bit(ATH_OP_INVALID, &common->op_flags)) { 837 ath_dbg(common, ANY, "Device not present\n"); 838 mutex_unlock(&sc->mutex); 839 return; 840 } 841 842 /* Ensure HW is awake when we try to shut it down. */ 843 ath9k_ps_wakeup(sc); 844 845 spin_lock_bh(&sc->sc_pcu_lock); 846 847 /* prevent tasklets to enable interrupts once we disable them */ 848 ah->imask &= ~ATH9K_INT_GLOBAL; 849 850 /* make sure h/w will not generate any interrupt 851 * before setting the invalid flag. */ 852 ath9k_hw_disable_interrupts(ah); 853 854 spin_unlock_bh(&sc->sc_pcu_lock); 855 856 /* we can now sync irq and kill any running tasklets, since we already 857 * disabled interrupts and not holding a spin lock */ 858 synchronize_irq(sc->irq); 859 tasklet_kill(&sc->intr_tq); 860 tasklet_kill(&sc->bcon_tasklet); 861 862 prev_idle = sc->ps_idle; 863 sc->ps_idle = true; 864 865 spin_lock_bh(&sc->sc_pcu_lock); 866 867 if (ah->led_pin >= 0) { 868 ath9k_hw_set_gpio(ah, ah->led_pin, 869 (ah->config.led_active_high) ? 0 : 1); 870 ath9k_hw_gpio_request_in(ah, ah->led_pin, NULL); 871 } 872 873 ath_prepare_reset(sc); 874 875 if (sc->rx.frag) { 876 dev_kfree_skb_any(sc->rx.frag); 877 sc->rx.frag = NULL; 878 } 879 880 if (!ah->curchan) 881 ah->curchan = ath9k_cmn_get_channel(hw, ah, 882 &sc->cur_chan->chandef); 883 884 ath9k_hw_reset(ah, ah->curchan, ah->caldata, false); 885 886 set_bit(ATH_OP_INVALID, &common->op_flags); 887 888 ath9k_hw_phy_disable(ah); 889 890 ath9k_hw_configpcipowersave(ah, true); 891 892 spin_unlock_bh(&sc->sc_pcu_lock); 893 894 ath9k_ps_restore(sc); 895 896 sc->ps_idle = prev_idle; 897 898 mutex_unlock(&sc->mutex); 899 900 ath_dbg(common, CONFIG, "Driver halt\n"); 901 } 902 903 static bool ath9k_uses_beacons(int type) 904 { 905 switch (type) { 906 case NL80211_IFTYPE_AP: 907 case NL80211_IFTYPE_ADHOC: 908 case NL80211_IFTYPE_MESH_POINT: 909 return true; 910 default: 911 return false; 912 } 913 } 914 915 static void ath9k_vif_iter_set_beacon(struct ath9k_vif_iter_data *iter_data, 916 struct ieee80211_vif *vif) 917 { 918 /* Use the first (configured) interface, but prefering AP interfaces. */ 919 if (!iter_data->primary_beacon_vif) { 920 iter_data->primary_beacon_vif = vif; 921 } else { 922 if (iter_data->primary_beacon_vif->type != NL80211_IFTYPE_AP && 923 vif->type == NL80211_IFTYPE_AP) 924 iter_data->primary_beacon_vif = vif; 925 } 926 927 iter_data->beacons = true; 928 iter_data->nbcnvifs += 1; 929 } 930 931 static void ath9k_vif_iter(struct ath9k_vif_iter_data *iter_data, 932 u8 *mac, struct ieee80211_vif *vif) 933 { 934 struct ath_vif *avp = (struct ath_vif *)vif->drv_priv; 935 int i; 936 937 if (iter_data->has_hw_macaddr) { 938 for (i = 0; i < ETH_ALEN; i++) 939 iter_data->mask[i] &= 940 ~(iter_data->hw_macaddr[i] ^ mac[i]); 941 } else { 942 memcpy(iter_data->hw_macaddr, mac, ETH_ALEN); 943 iter_data->has_hw_macaddr = true; 944 } 945 946 if (!vif->bss_conf.use_short_slot) 947 iter_data->slottime = 20; 948 949 switch (vif->type) { 950 case NL80211_IFTYPE_AP: 951 iter_data->naps++; 952 if (vif->bss_conf.enable_beacon) 953 ath9k_vif_iter_set_beacon(iter_data, vif); 954 break; 955 case NL80211_IFTYPE_STATION: 956 iter_data->nstations++; 957 if (avp->assoc && !iter_data->primary_sta) 958 iter_data->primary_sta = vif; 959 break; 960 case NL80211_IFTYPE_OCB: 961 iter_data->nocbs++; 962 break; 963 case NL80211_IFTYPE_ADHOC: 964 iter_data->nadhocs++; 965 if (vif->bss_conf.enable_beacon) 966 ath9k_vif_iter_set_beacon(iter_data, vif); 967 break; 968 case NL80211_IFTYPE_MESH_POINT: 969 iter_data->nmeshes++; 970 if (vif->bss_conf.enable_beacon) 971 ath9k_vif_iter_set_beacon(iter_data, vif); 972 break; 973 case NL80211_IFTYPE_WDS: 974 iter_data->nwds++; 975 break; 976 default: 977 break; 978 } 979 } 980 981 static void ath9k_update_bssid_mask(struct ath_softc *sc, 982 struct ath_chanctx *ctx, 983 struct ath9k_vif_iter_data *iter_data) 984 { 985 struct ath_common *common = ath9k_hw_common(sc->sc_ah); 986 struct ath_vif *avp; 987 int i; 988 989 if (!ath9k_is_chanctx_enabled()) 990 return; 991 992 list_for_each_entry(avp, &ctx->vifs, list) { 993 if (ctx->nvifs_assigned != 1) 994 continue; 995 996 if (!iter_data->has_hw_macaddr) 997 continue; 998 999 ether_addr_copy(common->curbssid, avp->bssid); 1000 1001 /* perm_addr will be used as the p2p device address. */ 1002 for (i = 0; i < ETH_ALEN; i++) 1003 iter_data->mask[i] &= 1004 ~(iter_data->hw_macaddr[i] ^ 1005 sc->hw->wiphy->perm_addr[i]); 1006 } 1007 } 1008 1009 /* Called with sc->mutex held. */ 1010 void ath9k_calculate_iter_data(struct ath_softc *sc, 1011 struct ath_chanctx *ctx, 1012 struct ath9k_vif_iter_data *iter_data) 1013 { 1014 struct ath_vif *avp; 1015 1016 /* 1017 * The hardware will use primary station addr together with the 1018 * BSSID mask when matching addresses. 1019 */ 1020 memset(iter_data, 0, sizeof(*iter_data)); 1021 eth_broadcast_addr(iter_data->mask); 1022 iter_data->slottime = 9; 1023 1024 list_for_each_entry(avp, &ctx->vifs, list) 1025 ath9k_vif_iter(iter_data, avp->vif->addr, avp->vif); 1026 1027 ath9k_update_bssid_mask(sc, ctx, iter_data); 1028 } 1029 1030 static void ath9k_set_assoc_state(struct ath_softc *sc, 1031 struct ieee80211_vif *vif, bool changed) 1032 { 1033 struct ath_common *common = ath9k_hw_common(sc->sc_ah); 1034 struct ath_vif *avp = (struct ath_vif *)vif->drv_priv; 1035 unsigned long flags; 1036 1037 set_bit(ATH_OP_PRIM_STA_VIF, &common->op_flags); 1038 1039 ether_addr_copy(common->curbssid, avp->bssid); 1040 common->curaid = avp->aid; 1041 ath9k_hw_write_associd(sc->sc_ah); 1042 1043 if (changed) { 1044 common->last_rssi = ATH_RSSI_DUMMY_MARKER; 1045 sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER; 1046 1047 spin_lock_irqsave(&sc->sc_pm_lock, flags); 1048 sc->ps_flags |= PS_BEACON_SYNC | PS_WAIT_FOR_BEACON; 1049 spin_unlock_irqrestore(&sc->sc_pm_lock, flags); 1050 } 1051 1052 if (ath9k_hw_mci_is_enabled(sc->sc_ah)) 1053 ath9k_mci_update_wlan_channels(sc, false); 1054 1055 ath_dbg(common, CONFIG, 1056 "Primary Station interface: %pM, BSSID: %pM\n", 1057 vif->addr, common->curbssid); 1058 } 1059 1060 #ifdef CONFIG_ATH9K_CHANNEL_CONTEXT 1061 static void ath9k_set_offchannel_state(struct ath_softc *sc) 1062 { 1063 struct ath_hw *ah = sc->sc_ah; 1064 struct ath_common *common = ath9k_hw_common(ah); 1065 struct ieee80211_vif *vif = NULL; 1066 1067 ath9k_ps_wakeup(sc); 1068 1069 if (sc->offchannel.state < ATH_OFFCHANNEL_ROC_START) 1070 vif = sc->offchannel.scan_vif; 1071 else 1072 vif = sc->offchannel.roc_vif; 1073 1074 if (WARN_ON(!vif)) 1075 goto exit; 1076 1077 eth_zero_addr(common->curbssid); 1078 eth_broadcast_addr(common->bssidmask); 1079 memcpy(common->macaddr, vif->addr, ETH_ALEN); 1080 common->curaid = 0; 1081 ah->opmode = vif->type; 1082 ah->imask &= ~ATH9K_INT_SWBA; 1083 ah->imask &= ~ATH9K_INT_TSFOOR; 1084 ah->slottime = 9; 1085 1086 ath_hw_setbssidmask(common); 1087 ath9k_hw_setopmode(ah); 1088 ath9k_hw_write_associd(sc->sc_ah); 1089 ath9k_hw_set_interrupts(ah); 1090 ath9k_hw_init_global_settings(ah); 1091 1092 exit: 1093 ath9k_ps_restore(sc); 1094 } 1095 #endif 1096 1097 /* Called with sc->mutex held. */ 1098 void ath9k_calculate_summary_state(struct ath_softc *sc, 1099 struct ath_chanctx *ctx) 1100 { 1101 struct ath_hw *ah = sc->sc_ah; 1102 struct ath_common *common = ath9k_hw_common(ah); 1103 struct ath9k_vif_iter_data iter_data; 1104 1105 ath_chanctx_check_active(sc, ctx); 1106 1107 if (ctx != sc->cur_chan) 1108 return; 1109 1110 #ifdef CONFIG_ATH9K_CHANNEL_CONTEXT 1111 if (ctx == &sc->offchannel.chan) 1112 return ath9k_set_offchannel_state(sc); 1113 #endif 1114 1115 ath9k_ps_wakeup(sc); 1116 ath9k_calculate_iter_data(sc, ctx, &iter_data); 1117 1118 if (iter_data.has_hw_macaddr) 1119 memcpy(common->macaddr, iter_data.hw_macaddr, ETH_ALEN); 1120 1121 memcpy(common->bssidmask, iter_data.mask, ETH_ALEN); 1122 ath_hw_setbssidmask(common); 1123 1124 if (iter_data.naps > 0) { 1125 ath9k_hw_set_tsfadjust(ah, true); 1126 ah->opmode = NL80211_IFTYPE_AP; 1127 } else { 1128 ath9k_hw_set_tsfadjust(ah, false); 1129 if (iter_data.beacons) 1130 ath9k_beacon_ensure_primary_slot(sc); 1131 1132 if (iter_data.nmeshes) 1133 ah->opmode = NL80211_IFTYPE_MESH_POINT; 1134 else if (iter_data.nocbs) 1135 ah->opmode = NL80211_IFTYPE_OCB; 1136 else if (iter_data.nwds) 1137 ah->opmode = NL80211_IFTYPE_AP; 1138 else if (iter_data.nadhocs) 1139 ah->opmode = NL80211_IFTYPE_ADHOC; 1140 else 1141 ah->opmode = NL80211_IFTYPE_STATION; 1142 } 1143 1144 ath9k_hw_setopmode(ah); 1145 1146 ctx->switch_after_beacon = false; 1147 if ((iter_data.nstations + iter_data.nadhocs + iter_data.nmeshes) > 0) 1148 ah->imask |= ATH9K_INT_TSFOOR; 1149 else { 1150 ah->imask &= ~ATH9K_INT_TSFOOR; 1151 if (iter_data.naps == 1 && iter_data.beacons) 1152 ctx->switch_after_beacon = true; 1153 } 1154 1155 if (ah->opmode == NL80211_IFTYPE_STATION) { 1156 bool changed = (iter_data.primary_sta != ctx->primary_sta); 1157 1158 if (iter_data.primary_sta) { 1159 iter_data.primary_beacon_vif = iter_data.primary_sta; 1160 iter_data.beacons = true; 1161 ath9k_set_assoc_state(sc, iter_data.primary_sta, 1162 changed); 1163 ctx->primary_sta = iter_data.primary_sta; 1164 } else { 1165 ctx->primary_sta = NULL; 1166 eth_zero_addr(common->curbssid); 1167 common->curaid = 0; 1168 ath9k_hw_write_associd(sc->sc_ah); 1169 if (ath9k_hw_mci_is_enabled(sc->sc_ah)) 1170 ath9k_mci_update_wlan_channels(sc, true); 1171 } 1172 } 1173 sc->nbcnvifs = iter_data.nbcnvifs; 1174 ath9k_beacon_config(sc, iter_data.primary_beacon_vif, 1175 iter_data.beacons); 1176 ath9k_hw_set_interrupts(ah); 1177 1178 if (ah->slottime != iter_data.slottime) { 1179 ah->slottime = iter_data.slottime; 1180 ath9k_hw_init_global_settings(ah); 1181 } 1182 1183 if (iter_data.primary_sta) 1184 set_bit(ATH_OP_PRIM_STA_VIF, &common->op_flags); 1185 else 1186 clear_bit(ATH_OP_PRIM_STA_VIF, &common->op_flags); 1187 1188 ath_dbg(common, CONFIG, 1189 "macaddr: %pM, bssid: %pM, bssidmask: %pM\n", 1190 common->macaddr, common->curbssid, common->bssidmask); 1191 1192 ath9k_ps_restore(sc); 1193 } 1194 1195 static void ath9k_tpc_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif) 1196 { 1197 int *power = data; 1198 1199 if (*power < vif->bss_conf.txpower) 1200 *power = vif->bss_conf.txpower; 1201 } 1202 1203 /* Called with sc->mutex held. */ 1204 void ath9k_set_txpower(struct ath_softc *sc, struct ieee80211_vif *vif) 1205 { 1206 int power; 1207 struct ath_hw *ah = sc->sc_ah; 1208 struct ath_regulatory *reg = ath9k_hw_regulatory(ah); 1209 1210 ath9k_ps_wakeup(sc); 1211 if (ah->tpc_enabled) { 1212 power = (vif) ? vif->bss_conf.txpower : -1; 1213 ieee80211_iterate_active_interfaces_atomic( 1214 sc->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 1215 ath9k_tpc_vif_iter, &power); 1216 if (power == -1) 1217 power = sc->hw->conf.power_level; 1218 } else { 1219 power = sc->hw->conf.power_level; 1220 } 1221 sc->cur_chan->txpower = 2 * power; 1222 ath9k_hw_set_txpowerlimit(ah, sc->cur_chan->txpower, false); 1223 sc->cur_chan->cur_txpower = reg->max_power_level; 1224 ath9k_ps_restore(sc); 1225 } 1226 1227 static void ath9k_assign_hw_queues(struct ieee80211_hw *hw, 1228 struct ieee80211_vif *vif) 1229 { 1230 int i; 1231 1232 if (!ath9k_is_chanctx_enabled()) 1233 return; 1234 1235 for (i = 0; i < IEEE80211_NUM_ACS; i++) 1236 vif->hw_queue[i] = i; 1237 1238 if (vif->type == NL80211_IFTYPE_AP || 1239 vif->type == NL80211_IFTYPE_MESH_POINT) 1240 vif->cab_queue = hw->queues - 2; 1241 else 1242 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE; 1243 } 1244 1245 static int ath9k_add_interface(struct ieee80211_hw *hw, 1246 struct ieee80211_vif *vif) 1247 { 1248 struct ath_softc *sc = hw->priv; 1249 struct ath_hw *ah = sc->sc_ah; 1250 struct ath_common *common = ath9k_hw_common(ah); 1251 struct ath_vif *avp = (void *)vif->drv_priv; 1252 struct ath_node *an = &avp->mcast_node; 1253 1254 if (IS_ENABLED(CONFIG_ATH9K_TX99)) 1255 return -EOPNOTSUPP; 1256 1257 mutex_lock(&sc->mutex); 1258 1259 ath_dbg(common, CONFIG, "Attach a VIF of type: %d\n", vif->type); 1260 sc->cur_chan->nvifs++; 1261 1262 if (vif->type == NL80211_IFTYPE_STATION && ath9k_is_chanctx_enabled()) 1263 vif->driver_flags |= IEEE80211_VIF_GET_NOA_UPDATE; 1264 1265 if (ath9k_uses_beacons(vif->type)) 1266 ath9k_beacon_assign_slot(sc, vif); 1267 1268 avp->vif = vif; 1269 if (!ath9k_is_chanctx_enabled()) { 1270 avp->chanctx = sc->cur_chan; 1271 list_add_tail(&avp->list, &avp->chanctx->vifs); 1272 } 1273 1274 ath9k_calculate_summary_state(sc, avp->chanctx); 1275 1276 ath9k_assign_hw_queues(hw, vif); 1277 1278 ath9k_set_txpower(sc, vif); 1279 1280 an->sc = sc; 1281 an->sta = NULL; 1282 an->vif = vif; 1283 an->no_ps_filter = true; 1284 ath_tx_node_init(sc, an); 1285 1286 mutex_unlock(&sc->mutex); 1287 return 0; 1288 } 1289 1290 static int ath9k_change_interface(struct ieee80211_hw *hw, 1291 struct ieee80211_vif *vif, 1292 enum nl80211_iftype new_type, 1293 bool p2p) 1294 { 1295 struct ath_softc *sc = hw->priv; 1296 struct ath_common *common = ath9k_hw_common(sc->sc_ah); 1297 struct ath_vif *avp = (void *)vif->drv_priv; 1298 1299 mutex_lock(&sc->mutex); 1300 1301 if (IS_ENABLED(CONFIG_ATH9K_TX99)) { 1302 mutex_unlock(&sc->mutex); 1303 return -EOPNOTSUPP; 1304 } 1305 1306 ath_dbg(common, CONFIG, "Change Interface\n"); 1307 1308 if (ath9k_uses_beacons(vif->type)) 1309 ath9k_beacon_remove_slot(sc, vif); 1310 1311 vif->type = new_type; 1312 vif->p2p = p2p; 1313 1314 if (ath9k_uses_beacons(vif->type)) 1315 ath9k_beacon_assign_slot(sc, vif); 1316 1317 ath9k_assign_hw_queues(hw, vif); 1318 ath9k_calculate_summary_state(sc, avp->chanctx); 1319 1320 ath9k_set_txpower(sc, vif); 1321 1322 mutex_unlock(&sc->mutex); 1323 return 0; 1324 } 1325 1326 static void ath9k_remove_interface(struct ieee80211_hw *hw, 1327 struct ieee80211_vif *vif) 1328 { 1329 struct ath_softc *sc = hw->priv; 1330 struct ath_common *common = ath9k_hw_common(sc->sc_ah); 1331 struct ath_vif *avp = (void *)vif->drv_priv; 1332 1333 ath_dbg(common, CONFIG, "Detach Interface\n"); 1334 1335 mutex_lock(&sc->mutex); 1336 1337 ath9k_p2p_remove_vif(sc, vif); 1338 1339 sc->cur_chan->nvifs--; 1340 if (!ath9k_is_chanctx_enabled()) 1341 list_del(&avp->list); 1342 1343 if (ath9k_uses_beacons(vif->type)) 1344 ath9k_beacon_remove_slot(sc, vif); 1345 1346 ath_tx_node_cleanup(sc, &avp->mcast_node); 1347 1348 ath9k_calculate_summary_state(sc, avp->chanctx); 1349 1350 ath9k_set_txpower(sc, NULL); 1351 1352 mutex_unlock(&sc->mutex); 1353 } 1354 1355 static void ath9k_enable_ps(struct ath_softc *sc) 1356 { 1357 struct ath_hw *ah = sc->sc_ah; 1358 struct ath_common *common = ath9k_hw_common(ah); 1359 1360 if (IS_ENABLED(CONFIG_ATH9K_TX99)) 1361 return; 1362 1363 sc->ps_enabled = true; 1364 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) { 1365 if ((ah->imask & ATH9K_INT_TIM_TIMER) == 0) { 1366 ah->imask |= ATH9K_INT_TIM_TIMER; 1367 ath9k_hw_set_interrupts(ah); 1368 } 1369 ath9k_hw_setrxabort(ah, 1); 1370 } 1371 ath_dbg(common, PS, "PowerSave enabled\n"); 1372 } 1373 1374 static void ath9k_disable_ps(struct ath_softc *sc) 1375 { 1376 struct ath_hw *ah = sc->sc_ah; 1377 struct ath_common *common = ath9k_hw_common(ah); 1378 1379 if (IS_ENABLED(CONFIG_ATH9K_TX99)) 1380 return; 1381 1382 sc->ps_enabled = false; 1383 ath9k_hw_setpower(ah, ATH9K_PM_AWAKE); 1384 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) { 1385 ath9k_hw_setrxabort(ah, 0); 1386 sc->ps_flags &= ~(PS_WAIT_FOR_BEACON | 1387 PS_WAIT_FOR_CAB | 1388 PS_WAIT_FOR_PSPOLL_DATA | 1389 PS_WAIT_FOR_TX_ACK); 1390 if (ah->imask & ATH9K_INT_TIM_TIMER) { 1391 ah->imask &= ~ATH9K_INT_TIM_TIMER; 1392 ath9k_hw_set_interrupts(ah); 1393 } 1394 } 1395 ath_dbg(common, PS, "PowerSave disabled\n"); 1396 } 1397 1398 static int ath9k_config(struct ieee80211_hw *hw, u32 changed) 1399 { 1400 struct ath_softc *sc = hw->priv; 1401 struct ath_hw *ah = sc->sc_ah; 1402 struct ath_common *common = ath9k_hw_common(ah); 1403 struct ieee80211_conf *conf = &hw->conf; 1404 struct ath_chanctx *ctx = sc->cur_chan; 1405 1406 ath9k_ps_wakeup(sc); 1407 mutex_lock(&sc->mutex); 1408 1409 if (changed & IEEE80211_CONF_CHANGE_IDLE) { 1410 sc->ps_idle = !!(conf->flags & IEEE80211_CONF_IDLE); 1411 if (sc->ps_idle) { 1412 ath_cancel_work(sc); 1413 ath9k_stop_btcoex(sc); 1414 } else { 1415 ath9k_start_btcoex(sc); 1416 /* 1417 * The chip needs a reset to properly wake up from 1418 * full sleep 1419 */ 1420 ath_chanctx_set_channel(sc, ctx, &ctx->chandef); 1421 } 1422 } 1423 1424 /* 1425 * We just prepare to enable PS. We have to wait until our AP has 1426 * ACK'd our null data frame to disable RX otherwise we'll ignore 1427 * those ACKs and end up retransmitting the same null data frames. 1428 * IEEE80211_CONF_CHANGE_PS is only passed by mac80211 for STA mode. 1429 */ 1430 if (changed & IEEE80211_CONF_CHANGE_PS) { 1431 unsigned long flags; 1432 spin_lock_irqsave(&sc->sc_pm_lock, flags); 1433 if (conf->flags & IEEE80211_CONF_PS) 1434 ath9k_enable_ps(sc); 1435 else 1436 ath9k_disable_ps(sc); 1437 spin_unlock_irqrestore(&sc->sc_pm_lock, flags); 1438 } 1439 1440 if (changed & IEEE80211_CONF_CHANGE_MONITOR) { 1441 if (conf->flags & IEEE80211_CONF_MONITOR) { 1442 ath_dbg(common, CONFIG, "Monitor mode is enabled\n"); 1443 sc->sc_ah->is_monitoring = true; 1444 } else { 1445 ath_dbg(common, CONFIG, "Monitor mode is disabled\n"); 1446 sc->sc_ah->is_monitoring = false; 1447 } 1448 } 1449 1450 if (!ath9k_is_chanctx_enabled() && (changed & IEEE80211_CONF_CHANGE_CHANNEL)) { 1451 ctx->offchannel = !!(conf->flags & IEEE80211_CONF_OFFCHANNEL); 1452 ath_chanctx_set_channel(sc, ctx, &hw->conf.chandef); 1453 } 1454 1455 mutex_unlock(&sc->mutex); 1456 ath9k_ps_restore(sc); 1457 1458 return 0; 1459 } 1460 1461 #define SUPPORTED_FILTERS \ 1462 (FIF_ALLMULTI | \ 1463 FIF_CONTROL | \ 1464 FIF_PSPOLL | \ 1465 FIF_OTHER_BSS | \ 1466 FIF_BCN_PRBRESP_PROMISC | \ 1467 FIF_PROBE_REQ | \ 1468 FIF_FCSFAIL) 1469 1470 /* FIXME: sc->sc_full_reset ? */ 1471 static void ath9k_configure_filter(struct ieee80211_hw *hw, 1472 unsigned int changed_flags, 1473 unsigned int *total_flags, 1474 u64 multicast) 1475 { 1476 struct ath_softc *sc = hw->priv; 1477 struct ath_chanctx *ctx; 1478 u32 rfilt; 1479 1480 changed_flags &= SUPPORTED_FILTERS; 1481 *total_flags &= SUPPORTED_FILTERS; 1482 1483 spin_lock_bh(&sc->chan_lock); 1484 ath_for_each_chanctx(sc, ctx) 1485 ctx->rxfilter = *total_flags; 1486 #ifdef CONFIG_ATH9K_CHANNEL_CONTEXT 1487 sc->offchannel.chan.rxfilter = *total_flags; 1488 #endif 1489 spin_unlock_bh(&sc->chan_lock); 1490 1491 ath9k_ps_wakeup(sc); 1492 rfilt = ath_calcrxfilter(sc); 1493 ath9k_hw_setrxfilter(sc->sc_ah, rfilt); 1494 ath9k_ps_restore(sc); 1495 1496 ath_dbg(ath9k_hw_common(sc->sc_ah), CONFIG, "Set HW RX filter: 0x%x\n", 1497 rfilt); 1498 } 1499 1500 static int ath9k_sta_add(struct ieee80211_hw *hw, 1501 struct ieee80211_vif *vif, 1502 struct ieee80211_sta *sta) 1503 { 1504 struct ath_softc *sc = hw->priv; 1505 struct ath_common *common = ath9k_hw_common(sc->sc_ah); 1506 struct ath_node *an = (struct ath_node *) sta->drv_priv; 1507 struct ieee80211_key_conf ps_key = { }; 1508 int key; 1509 1510 ath_node_attach(sc, sta, vif); 1511 1512 if (vif->type != NL80211_IFTYPE_AP && 1513 vif->type != NL80211_IFTYPE_AP_VLAN) 1514 return 0; 1515 1516 key = ath_key_config(common, vif, sta, &ps_key); 1517 if (key > 0) { 1518 an->ps_key = key; 1519 an->key_idx[0] = key; 1520 } 1521 1522 return 0; 1523 } 1524 1525 static void ath9k_del_ps_key(struct ath_softc *sc, 1526 struct ieee80211_vif *vif, 1527 struct ieee80211_sta *sta) 1528 { 1529 struct ath_common *common = ath9k_hw_common(sc->sc_ah); 1530 struct ath_node *an = (struct ath_node *) sta->drv_priv; 1531 struct ieee80211_key_conf ps_key = { .hw_key_idx = an->ps_key }; 1532 1533 if (!an->ps_key) 1534 return; 1535 1536 ath_key_delete(common, &ps_key); 1537 an->ps_key = 0; 1538 an->key_idx[0] = 0; 1539 } 1540 1541 static int ath9k_sta_remove(struct ieee80211_hw *hw, 1542 struct ieee80211_vif *vif, 1543 struct ieee80211_sta *sta) 1544 { 1545 struct ath_softc *sc = hw->priv; 1546 1547 ath9k_del_ps_key(sc, vif, sta); 1548 ath_node_detach(sc, sta); 1549 1550 return 0; 1551 } 1552 1553 static int ath9k_sta_state(struct ieee80211_hw *hw, 1554 struct ieee80211_vif *vif, 1555 struct ieee80211_sta *sta, 1556 enum ieee80211_sta_state old_state, 1557 enum ieee80211_sta_state new_state) 1558 { 1559 struct ath_softc *sc = hw->priv; 1560 struct ath_common *common = ath9k_hw_common(sc->sc_ah); 1561 int ret = 0; 1562 1563 if (old_state == IEEE80211_STA_NOTEXIST && 1564 new_state == IEEE80211_STA_NONE) { 1565 ret = ath9k_sta_add(hw, vif, sta); 1566 ath_dbg(common, CONFIG, 1567 "Add station: %pM\n", sta->addr); 1568 } else if (old_state == IEEE80211_STA_NONE && 1569 new_state == IEEE80211_STA_NOTEXIST) { 1570 ret = ath9k_sta_remove(hw, vif, sta); 1571 ath_dbg(common, CONFIG, 1572 "Remove station: %pM\n", sta->addr); 1573 } 1574 1575 if (ath9k_is_chanctx_enabled()) { 1576 if (vif->type == NL80211_IFTYPE_STATION) { 1577 if (old_state == IEEE80211_STA_ASSOC && 1578 new_state == IEEE80211_STA_AUTHORIZED) 1579 ath_chanctx_event(sc, vif, 1580 ATH_CHANCTX_EVENT_AUTHORIZED); 1581 } 1582 } 1583 1584 return ret; 1585 } 1586 1587 static void ath9k_sta_set_tx_filter(struct ath_hw *ah, 1588 struct ath_node *an, 1589 bool set) 1590 { 1591 int i; 1592 1593 for (i = 0; i < ARRAY_SIZE(an->key_idx); i++) { 1594 if (!an->key_idx[i]) 1595 continue; 1596 ath9k_hw_set_tx_filter(ah, an->key_idx[i], set); 1597 } 1598 } 1599 1600 static void ath9k_sta_notify(struct ieee80211_hw *hw, 1601 struct ieee80211_vif *vif, 1602 enum sta_notify_cmd cmd, 1603 struct ieee80211_sta *sta) 1604 { 1605 struct ath_softc *sc = hw->priv; 1606 struct ath_node *an = (struct ath_node *) sta->drv_priv; 1607 1608 switch (cmd) { 1609 case STA_NOTIFY_SLEEP: 1610 an->sleeping = true; 1611 ath_tx_aggr_sleep(sta, sc, an); 1612 ath9k_sta_set_tx_filter(sc->sc_ah, an, true); 1613 break; 1614 case STA_NOTIFY_AWAKE: 1615 ath9k_sta_set_tx_filter(sc->sc_ah, an, false); 1616 an->sleeping = false; 1617 ath_tx_aggr_wakeup(sc, an); 1618 break; 1619 } 1620 } 1621 1622 static int ath9k_conf_tx(struct ieee80211_hw *hw, 1623 struct ieee80211_vif *vif, u16 queue, 1624 const struct ieee80211_tx_queue_params *params) 1625 { 1626 struct ath_softc *sc = hw->priv; 1627 struct ath_common *common = ath9k_hw_common(sc->sc_ah); 1628 struct ath_txq *txq; 1629 struct ath9k_tx_queue_info qi; 1630 int ret = 0; 1631 1632 if (queue >= IEEE80211_NUM_ACS) 1633 return 0; 1634 1635 txq = sc->tx.txq_map[queue]; 1636 1637 ath9k_ps_wakeup(sc); 1638 mutex_lock(&sc->mutex); 1639 1640 memset(&qi, 0, sizeof(struct ath9k_tx_queue_info)); 1641 1642 qi.tqi_aifs = params->aifs; 1643 qi.tqi_cwmin = params->cw_min; 1644 qi.tqi_cwmax = params->cw_max; 1645 qi.tqi_burstTime = params->txop * 32; 1646 1647 ath_dbg(common, CONFIG, 1648 "Configure tx [queue/halq] [%d/%d], aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n", 1649 queue, txq->axq_qnum, params->aifs, params->cw_min, 1650 params->cw_max, params->txop); 1651 1652 ath_update_max_aggr_framelen(sc, queue, qi.tqi_burstTime); 1653 ret = ath_txq_update(sc, txq->axq_qnum, &qi); 1654 if (ret) 1655 ath_err(common, "TXQ Update failed\n"); 1656 1657 mutex_unlock(&sc->mutex); 1658 ath9k_ps_restore(sc); 1659 1660 return ret; 1661 } 1662 1663 static int ath9k_set_key(struct ieee80211_hw *hw, 1664 enum set_key_cmd cmd, 1665 struct ieee80211_vif *vif, 1666 struct ieee80211_sta *sta, 1667 struct ieee80211_key_conf *key) 1668 { 1669 struct ath_softc *sc = hw->priv; 1670 struct ath_common *common = ath9k_hw_common(sc->sc_ah); 1671 struct ath_node *an = NULL; 1672 int ret = 0, i; 1673 1674 if (ath9k_modparam_nohwcrypt) 1675 return -ENOSPC; 1676 1677 if ((vif->type == NL80211_IFTYPE_ADHOC || 1678 vif->type == NL80211_IFTYPE_MESH_POINT) && 1679 (key->cipher == WLAN_CIPHER_SUITE_TKIP || 1680 key->cipher == WLAN_CIPHER_SUITE_CCMP) && 1681 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { 1682 /* 1683 * For now, disable hw crypto for the RSN IBSS group keys. This 1684 * could be optimized in the future to use a modified key cache 1685 * design to support per-STA RX GTK, but until that gets 1686 * implemented, use of software crypto for group addressed 1687 * frames is a acceptable to allow RSN IBSS to be used. 1688 */ 1689 return -EOPNOTSUPP; 1690 } 1691 1692 mutex_lock(&sc->mutex); 1693 ath9k_ps_wakeup(sc); 1694 ath_dbg(common, CONFIG, "Set HW Key %d\n", cmd); 1695 if (sta) 1696 an = (struct ath_node *)sta->drv_priv; 1697 1698 switch (cmd) { 1699 case SET_KEY: 1700 if (sta) 1701 ath9k_del_ps_key(sc, vif, sta); 1702 1703 key->hw_key_idx = 0; 1704 ret = ath_key_config(common, vif, sta, key); 1705 if (ret >= 0) { 1706 key->hw_key_idx = ret; 1707 /* push IV and Michael MIC generation to stack */ 1708 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; 1709 if (key->cipher == WLAN_CIPHER_SUITE_TKIP) 1710 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC; 1711 if (sc->sc_ah->sw_mgmt_crypto_tx && 1712 key->cipher == WLAN_CIPHER_SUITE_CCMP) 1713 key->flags |= IEEE80211_KEY_FLAG_SW_MGMT_TX; 1714 ret = 0; 1715 } 1716 if (an && key->hw_key_idx) { 1717 for (i = 0; i < ARRAY_SIZE(an->key_idx); i++) { 1718 if (an->key_idx[i]) 1719 continue; 1720 an->key_idx[i] = key->hw_key_idx; 1721 break; 1722 } 1723 WARN_ON(i == ARRAY_SIZE(an->key_idx)); 1724 } 1725 break; 1726 case DISABLE_KEY: 1727 ath_key_delete(common, key); 1728 if (an) { 1729 for (i = 0; i < ARRAY_SIZE(an->key_idx); i++) { 1730 if (an->key_idx[i] != key->hw_key_idx) 1731 continue; 1732 an->key_idx[i] = 0; 1733 break; 1734 } 1735 } 1736 key->hw_key_idx = 0; 1737 break; 1738 default: 1739 ret = -EINVAL; 1740 } 1741 1742 ath9k_ps_restore(sc); 1743 mutex_unlock(&sc->mutex); 1744 1745 return ret; 1746 } 1747 1748 static void ath9k_bss_info_changed(struct ieee80211_hw *hw, 1749 struct ieee80211_vif *vif, 1750 struct ieee80211_bss_conf *bss_conf, 1751 u32 changed) 1752 { 1753 #define CHECK_ANI \ 1754 (BSS_CHANGED_ASSOC | \ 1755 BSS_CHANGED_IBSS | \ 1756 BSS_CHANGED_BEACON_ENABLED) 1757 1758 struct ath_softc *sc = hw->priv; 1759 struct ath_hw *ah = sc->sc_ah; 1760 struct ath_common *common = ath9k_hw_common(ah); 1761 struct ath_vif *avp = (void *)vif->drv_priv; 1762 int slottime; 1763 1764 ath9k_ps_wakeup(sc); 1765 mutex_lock(&sc->mutex); 1766 1767 if (changed & BSS_CHANGED_ASSOC) { 1768 ath_dbg(common, CONFIG, "BSSID %pM Changed ASSOC %d\n", 1769 bss_conf->bssid, bss_conf->assoc); 1770 1771 memcpy(avp->bssid, bss_conf->bssid, ETH_ALEN); 1772 avp->aid = bss_conf->aid; 1773 avp->assoc = bss_conf->assoc; 1774 1775 ath9k_calculate_summary_state(sc, avp->chanctx); 1776 } 1777 1778 if ((changed & BSS_CHANGED_IBSS) || 1779 (changed & BSS_CHANGED_OCB)) { 1780 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN); 1781 common->curaid = bss_conf->aid; 1782 ath9k_hw_write_associd(sc->sc_ah); 1783 } 1784 1785 if ((changed & BSS_CHANGED_BEACON_ENABLED) || 1786 (changed & BSS_CHANGED_BEACON_INT) || 1787 (changed & BSS_CHANGED_BEACON_INFO)) { 1788 ath9k_calculate_summary_state(sc, avp->chanctx); 1789 } 1790 1791 if ((avp->chanctx == sc->cur_chan) && 1792 (changed & BSS_CHANGED_ERP_SLOT)) { 1793 if (bss_conf->use_short_slot) 1794 slottime = 9; 1795 else 1796 slottime = 20; 1797 1798 if (vif->type == NL80211_IFTYPE_AP) { 1799 /* 1800 * Defer update, so that connected stations can adjust 1801 * their settings at the same time. 1802 * See beacon.c for more details 1803 */ 1804 sc->beacon.slottime = slottime; 1805 sc->beacon.updateslot = UPDATE; 1806 } else { 1807 ah->slottime = slottime; 1808 ath9k_hw_init_global_settings(ah); 1809 } 1810 } 1811 1812 if (changed & BSS_CHANGED_P2P_PS) 1813 ath9k_p2p_bss_info_changed(sc, vif); 1814 1815 if (changed & CHECK_ANI) 1816 ath_check_ani(sc); 1817 1818 if (changed & BSS_CHANGED_TXPOWER) { 1819 ath_dbg(common, CONFIG, "vif %pM power %d dbm power_type %d\n", 1820 vif->addr, bss_conf->txpower, bss_conf->txpower_type); 1821 ath9k_set_txpower(sc, vif); 1822 } 1823 1824 mutex_unlock(&sc->mutex); 1825 ath9k_ps_restore(sc); 1826 1827 #undef CHECK_ANI 1828 } 1829 1830 static u64 ath9k_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif) 1831 { 1832 struct ath_softc *sc = hw->priv; 1833 struct ath_vif *avp = (void *)vif->drv_priv; 1834 u64 tsf; 1835 1836 mutex_lock(&sc->mutex); 1837 ath9k_ps_wakeup(sc); 1838 /* Get current TSF either from HW or kernel time. */ 1839 if (sc->cur_chan == avp->chanctx) { 1840 tsf = ath9k_hw_gettsf64(sc->sc_ah); 1841 } else { 1842 tsf = sc->cur_chan->tsf_val + 1843 ath9k_hw_get_tsf_offset(&sc->cur_chan->tsf_ts, NULL); 1844 } 1845 tsf += le64_to_cpu(avp->tsf_adjust); 1846 ath9k_ps_restore(sc); 1847 mutex_unlock(&sc->mutex); 1848 1849 return tsf; 1850 } 1851 1852 static void ath9k_set_tsf(struct ieee80211_hw *hw, 1853 struct ieee80211_vif *vif, 1854 u64 tsf) 1855 { 1856 struct ath_softc *sc = hw->priv; 1857 struct ath_vif *avp = (void *)vif->drv_priv; 1858 1859 mutex_lock(&sc->mutex); 1860 ath9k_ps_wakeup(sc); 1861 tsf -= le64_to_cpu(avp->tsf_adjust); 1862 ktime_get_raw_ts64(&avp->chanctx->tsf_ts); 1863 if (sc->cur_chan == avp->chanctx) 1864 ath9k_hw_settsf64(sc->sc_ah, tsf); 1865 avp->chanctx->tsf_val = tsf; 1866 ath9k_ps_restore(sc); 1867 mutex_unlock(&sc->mutex); 1868 } 1869 1870 static void ath9k_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif) 1871 { 1872 struct ath_softc *sc = hw->priv; 1873 struct ath_vif *avp = (void *)vif->drv_priv; 1874 1875 mutex_lock(&sc->mutex); 1876 1877 ath9k_ps_wakeup(sc); 1878 ktime_get_raw_ts64(&avp->chanctx->tsf_ts); 1879 if (sc->cur_chan == avp->chanctx) 1880 ath9k_hw_reset_tsf(sc->sc_ah); 1881 avp->chanctx->tsf_val = 0; 1882 ath9k_ps_restore(sc); 1883 1884 mutex_unlock(&sc->mutex); 1885 } 1886 1887 static int ath9k_ampdu_action(struct ieee80211_hw *hw, 1888 struct ieee80211_vif *vif, 1889 struct ieee80211_ampdu_params *params) 1890 { 1891 struct ath_softc *sc = hw->priv; 1892 struct ath_common *common = ath9k_hw_common(sc->sc_ah); 1893 bool flush = false; 1894 int ret = 0; 1895 struct ieee80211_sta *sta = params->sta; 1896 struct ath_node *an = (struct ath_node *)sta->drv_priv; 1897 enum ieee80211_ampdu_mlme_action action = params->action; 1898 u16 tid = params->tid; 1899 u16 *ssn = ¶ms->ssn; 1900 struct ath_atx_tid *atid; 1901 1902 mutex_lock(&sc->mutex); 1903 1904 switch (action) { 1905 case IEEE80211_AMPDU_RX_START: 1906 break; 1907 case IEEE80211_AMPDU_RX_STOP: 1908 break; 1909 case IEEE80211_AMPDU_TX_START: 1910 if (ath9k_is_chanctx_enabled()) { 1911 if (test_bit(ATH_OP_SCANNING, &common->op_flags)) { 1912 ret = -EBUSY; 1913 break; 1914 } 1915 } 1916 ath9k_ps_wakeup(sc); 1917 ret = ath_tx_aggr_start(sc, sta, tid, ssn); 1918 if (!ret) 1919 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1920 ath9k_ps_restore(sc); 1921 break; 1922 case IEEE80211_AMPDU_TX_STOP_FLUSH: 1923 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: 1924 flush = true; 1925 /* fall through */ 1926 case IEEE80211_AMPDU_TX_STOP_CONT: 1927 ath9k_ps_wakeup(sc); 1928 ath_tx_aggr_stop(sc, sta, tid); 1929 if (!flush) 1930 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); 1931 ath9k_ps_restore(sc); 1932 break; 1933 case IEEE80211_AMPDU_TX_OPERATIONAL: 1934 atid = ath_node_to_tid(an, tid); 1935 atid->baw_size = IEEE80211_MIN_AMPDU_BUF << 1936 sta->ht_cap.ampdu_factor; 1937 break; 1938 default: 1939 ath_err(ath9k_hw_common(sc->sc_ah), "Unknown AMPDU action\n"); 1940 } 1941 1942 mutex_unlock(&sc->mutex); 1943 1944 return ret; 1945 } 1946 1947 static int ath9k_get_survey(struct ieee80211_hw *hw, int idx, 1948 struct survey_info *survey) 1949 { 1950 struct ath_softc *sc = hw->priv; 1951 struct ath_common *common = ath9k_hw_common(sc->sc_ah); 1952 struct ieee80211_supported_band *sband; 1953 struct ieee80211_channel *chan; 1954 unsigned long flags; 1955 int pos; 1956 1957 if (IS_ENABLED(CONFIG_ATH9K_TX99)) 1958 return -EOPNOTSUPP; 1959 1960 spin_lock_irqsave(&common->cc_lock, flags); 1961 if (idx == 0) 1962 ath_update_survey_stats(sc); 1963 1964 sband = hw->wiphy->bands[NL80211_BAND_2GHZ]; 1965 if (sband && idx >= sband->n_channels) { 1966 idx -= sband->n_channels; 1967 sband = NULL; 1968 } 1969 1970 if (!sband) 1971 sband = hw->wiphy->bands[NL80211_BAND_5GHZ]; 1972 1973 if (!sband || idx >= sband->n_channels) { 1974 spin_unlock_irqrestore(&common->cc_lock, flags); 1975 return -ENOENT; 1976 } 1977 1978 chan = &sband->channels[idx]; 1979 pos = chan->hw_value; 1980 memcpy(survey, &sc->survey[pos], sizeof(*survey)); 1981 survey->channel = chan; 1982 spin_unlock_irqrestore(&common->cc_lock, flags); 1983 1984 return 0; 1985 } 1986 1987 static void ath9k_enable_dynack(struct ath_softc *sc) 1988 { 1989 #ifdef CONFIG_ATH9K_DYNACK 1990 u32 rfilt; 1991 struct ath_hw *ah = sc->sc_ah; 1992 1993 ath_dynack_reset(ah); 1994 1995 ah->dynack.enabled = true; 1996 rfilt = ath_calcrxfilter(sc); 1997 ath9k_hw_setrxfilter(ah, rfilt); 1998 #endif 1999 } 2000 2001 static void ath9k_set_coverage_class(struct ieee80211_hw *hw, 2002 s16 coverage_class) 2003 { 2004 struct ath_softc *sc = hw->priv; 2005 struct ath_hw *ah = sc->sc_ah; 2006 2007 if (IS_ENABLED(CONFIG_ATH9K_TX99)) 2008 return; 2009 2010 mutex_lock(&sc->mutex); 2011 2012 if (coverage_class >= 0) { 2013 ah->coverage_class = coverage_class; 2014 if (ah->dynack.enabled) { 2015 u32 rfilt; 2016 2017 ah->dynack.enabled = false; 2018 rfilt = ath_calcrxfilter(sc); 2019 ath9k_hw_setrxfilter(ah, rfilt); 2020 } 2021 ath9k_ps_wakeup(sc); 2022 ath9k_hw_init_global_settings(ah); 2023 ath9k_ps_restore(sc); 2024 } else if (!ah->dynack.enabled) { 2025 ath9k_enable_dynack(sc); 2026 } 2027 2028 mutex_unlock(&sc->mutex); 2029 } 2030 2031 static bool ath9k_has_tx_pending(struct ath_softc *sc, 2032 bool sw_pending) 2033 { 2034 int i, npend = 0; 2035 2036 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) { 2037 if (!ATH_TXQ_SETUP(sc, i)) 2038 continue; 2039 2040 npend = ath9k_has_pending_frames(sc, &sc->tx.txq[i], 2041 sw_pending); 2042 if (npend) 2043 break; 2044 } 2045 2046 return !!npend; 2047 } 2048 2049 static void ath9k_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2050 u32 queues, bool drop) 2051 { 2052 struct ath_softc *sc = hw->priv; 2053 struct ath_common *common = ath9k_hw_common(sc->sc_ah); 2054 2055 if (ath9k_is_chanctx_enabled()) { 2056 if (!test_bit(ATH_OP_MULTI_CHANNEL, &common->op_flags)) 2057 goto flush; 2058 2059 /* 2060 * If MCC is active, extend the flush timeout 2061 * and wait for the HW/SW queues to become 2062 * empty. This needs to be done outside the 2063 * sc->mutex lock to allow the channel scheduler 2064 * to switch channel contexts. 2065 * 2066 * The vif queues have been stopped in mac80211, 2067 * so there won't be any incoming frames. 2068 */ 2069 __ath9k_flush(hw, queues, drop, true, true); 2070 return; 2071 } 2072 flush: 2073 mutex_lock(&sc->mutex); 2074 __ath9k_flush(hw, queues, drop, true, false); 2075 mutex_unlock(&sc->mutex); 2076 } 2077 2078 void __ath9k_flush(struct ieee80211_hw *hw, u32 queues, bool drop, 2079 bool sw_pending, bool timeout_override) 2080 { 2081 struct ath_softc *sc = hw->priv; 2082 struct ath_hw *ah = sc->sc_ah; 2083 struct ath_common *common = ath9k_hw_common(ah); 2084 int timeout; 2085 bool drain_txq; 2086 2087 cancel_delayed_work_sync(&sc->hw_check_work); 2088 2089 if (ah->ah_flags & AH_UNPLUGGED) { 2090 ath_dbg(common, ANY, "Device has been unplugged!\n"); 2091 return; 2092 } 2093 2094 if (test_bit(ATH_OP_INVALID, &common->op_flags)) { 2095 ath_dbg(common, ANY, "Device not present\n"); 2096 return; 2097 } 2098 2099 spin_lock_bh(&sc->chan_lock); 2100 if (timeout_override) 2101 timeout = HZ / 5; 2102 else 2103 timeout = sc->cur_chan->flush_timeout; 2104 spin_unlock_bh(&sc->chan_lock); 2105 2106 ath_dbg(common, CHAN_CTX, 2107 "Flush timeout: %d\n", jiffies_to_msecs(timeout)); 2108 2109 if (wait_event_timeout(sc->tx_wait, !ath9k_has_tx_pending(sc, sw_pending), 2110 timeout) > 0) 2111 drop = false; 2112 2113 if (drop) { 2114 ath9k_ps_wakeup(sc); 2115 spin_lock_bh(&sc->sc_pcu_lock); 2116 drain_txq = ath_drain_all_txq(sc); 2117 spin_unlock_bh(&sc->sc_pcu_lock); 2118 2119 if (!drain_txq) 2120 ath_reset(sc, NULL); 2121 2122 ath9k_ps_restore(sc); 2123 } 2124 2125 ieee80211_queue_delayed_work(hw, &sc->hw_check_work, 2126 ATH_HW_CHECK_POLL_INT); 2127 } 2128 2129 static bool ath9k_tx_frames_pending(struct ieee80211_hw *hw) 2130 { 2131 struct ath_softc *sc = hw->priv; 2132 2133 return ath9k_has_tx_pending(sc, true); 2134 } 2135 2136 static int ath9k_tx_last_beacon(struct ieee80211_hw *hw) 2137 { 2138 struct ath_softc *sc = hw->priv; 2139 struct ath_hw *ah = sc->sc_ah; 2140 struct ieee80211_vif *vif; 2141 struct ath_vif *avp; 2142 struct ath_buf *bf; 2143 struct ath_tx_status ts; 2144 bool edma = !!(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA); 2145 int status; 2146 2147 vif = sc->beacon.bslot[0]; 2148 if (!vif) 2149 return 0; 2150 2151 if (!vif->bss_conf.enable_beacon) 2152 return 0; 2153 2154 avp = (void *)vif->drv_priv; 2155 2156 if (!sc->beacon.tx_processed && !edma) { 2157 tasklet_disable(&sc->bcon_tasklet); 2158 2159 bf = avp->av_bcbuf; 2160 if (!bf || !bf->bf_mpdu) 2161 goto skip; 2162 2163 status = ath9k_hw_txprocdesc(ah, bf->bf_desc, &ts); 2164 if (status == -EINPROGRESS) 2165 goto skip; 2166 2167 sc->beacon.tx_processed = true; 2168 sc->beacon.tx_last = !(ts.ts_status & ATH9K_TXERR_MASK); 2169 2170 skip: 2171 tasklet_enable(&sc->bcon_tasklet); 2172 } 2173 2174 return sc->beacon.tx_last; 2175 } 2176 2177 static int ath9k_get_stats(struct ieee80211_hw *hw, 2178 struct ieee80211_low_level_stats *stats) 2179 { 2180 struct ath_softc *sc = hw->priv; 2181 struct ath_hw *ah = sc->sc_ah; 2182 struct ath9k_mib_stats *mib_stats = &ah->ah_mibStats; 2183 2184 stats->dot11ACKFailureCount = mib_stats->ackrcv_bad; 2185 stats->dot11RTSFailureCount = mib_stats->rts_bad; 2186 stats->dot11FCSErrorCount = mib_stats->fcs_bad; 2187 stats->dot11RTSSuccessCount = mib_stats->rts_good; 2188 return 0; 2189 } 2190 2191 static u32 fill_chainmask(u32 cap, u32 new) 2192 { 2193 u32 filled = 0; 2194 int i; 2195 2196 for (i = 0; cap && new; i++, cap >>= 1) { 2197 if (!(cap & BIT(0))) 2198 continue; 2199 2200 if (new & BIT(0)) 2201 filled |= BIT(i); 2202 2203 new >>= 1; 2204 } 2205 2206 return filled; 2207 } 2208 2209 static bool validate_antenna_mask(struct ath_hw *ah, u32 val) 2210 { 2211 if (AR_SREV_9300_20_OR_LATER(ah)) 2212 return true; 2213 2214 switch (val & 0x7) { 2215 case 0x1: 2216 case 0x3: 2217 case 0x7: 2218 return true; 2219 case 0x2: 2220 return (ah->caps.rx_chainmask == 1); 2221 default: 2222 return false; 2223 } 2224 } 2225 2226 static int ath9k_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant) 2227 { 2228 struct ath_softc *sc = hw->priv; 2229 struct ath_hw *ah = sc->sc_ah; 2230 2231 if (ah->caps.rx_chainmask != 1) 2232 rx_ant |= tx_ant; 2233 2234 if (!validate_antenna_mask(ah, rx_ant) || !tx_ant) 2235 return -EINVAL; 2236 2237 sc->ant_rx = rx_ant; 2238 sc->ant_tx = tx_ant; 2239 2240 if (ah->caps.rx_chainmask == 1) 2241 return 0; 2242 2243 /* AR9100 runs into calibration issues if not all rx chains are enabled */ 2244 if (AR_SREV_9100(ah)) 2245 ah->rxchainmask = 0x7; 2246 else 2247 ah->rxchainmask = fill_chainmask(ah->caps.rx_chainmask, rx_ant); 2248 2249 ah->txchainmask = fill_chainmask(ah->caps.tx_chainmask, tx_ant); 2250 ath9k_cmn_reload_chainmask(ah); 2251 2252 return 0; 2253 } 2254 2255 static int ath9k_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant) 2256 { 2257 struct ath_softc *sc = hw->priv; 2258 2259 *tx_ant = sc->ant_tx; 2260 *rx_ant = sc->ant_rx; 2261 return 0; 2262 } 2263 2264 static void ath9k_sw_scan_start(struct ieee80211_hw *hw, 2265 struct ieee80211_vif *vif, 2266 const u8 *mac_addr) 2267 { 2268 struct ath_softc *sc = hw->priv; 2269 struct ath_common *common = ath9k_hw_common(sc->sc_ah); 2270 set_bit(ATH_OP_SCANNING, &common->op_flags); 2271 } 2272 2273 static void ath9k_sw_scan_complete(struct ieee80211_hw *hw, 2274 struct ieee80211_vif *vif) 2275 { 2276 struct ath_softc *sc = hw->priv; 2277 struct ath_common *common = ath9k_hw_common(sc->sc_ah); 2278 clear_bit(ATH_OP_SCANNING, &common->op_flags); 2279 } 2280 2281 #ifdef CONFIG_ATH9K_CHANNEL_CONTEXT 2282 2283 static void ath9k_cancel_pending_offchannel(struct ath_softc *sc) 2284 { 2285 struct ath_common *common = ath9k_hw_common(sc->sc_ah); 2286 2287 if (sc->offchannel.roc_vif) { 2288 ath_dbg(common, CHAN_CTX, 2289 "%s: Aborting RoC\n", __func__); 2290 2291 del_timer_sync(&sc->offchannel.timer); 2292 if (sc->offchannel.state >= ATH_OFFCHANNEL_ROC_START) 2293 ath_roc_complete(sc, ATH_ROC_COMPLETE_ABORT); 2294 } 2295 2296 if (test_bit(ATH_OP_SCANNING, &common->op_flags)) { 2297 ath_dbg(common, CHAN_CTX, 2298 "%s: Aborting HW scan\n", __func__); 2299 2300 del_timer_sync(&sc->offchannel.timer); 2301 ath_scan_complete(sc, true); 2302 } 2303 } 2304 2305 static int ath9k_hw_scan(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2306 struct ieee80211_scan_request *hw_req) 2307 { 2308 struct cfg80211_scan_request *req = &hw_req->req; 2309 struct ath_softc *sc = hw->priv; 2310 struct ath_common *common = ath9k_hw_common(sc->sc_ah); 2311 int ret = 0; 2312 2313 mutex_lock(&sc->mutex); 2314 2315 if (WARN_ON(sc->offchannel.scan_req)) { 2316 ret = -EBUSY; 2317 goto out; 2318 } 2319 2320 ath9k_ps_wakeup(sc); 2321 set_bit(ATH_OP_SCANNING, &common->op_flags); 2322 sc->offchannel.scan_vif = vif; 2323 sc->offchannel.scan_req = req; 2324 sc->offchannel.scan_idx = 0; 2325 2326 ath_dbg(common, CHAN_CTX, "HW scan request received on vif: %pM\n", 2327 vif->addr); 2328 2329 if (sc->offchannel.state == ATH_OFFCHANNEL_IDLE) { 2330 ath_dbg(common, CHAN_CTX, "Starting HW scan\n"); 2331 ath_offchannel_next(sc); 2332 } 2333 2334 out: 2335 mutex_unlock(&sc->mutex); 2336 2337 return ret; 2338 } 2339 2340 static void ath9k_cancel_hw_scan(struct ieee80211_hw *hw, 2341 struct ieee80211_vif *vif) 2342 { 2343 struct ath_softc *sc = hw->priv; 2344 struct ath_common *common = ath9k_hw_common(sc->sc_ah); 2345 2346 ath_dbg(common, CHAN_CTX, "Cancel HW scan on vif: %pM\n", vif->addr); 2347 2348 mutex_lock(&sc->mutex); 2349 del_timer_sync(&sc->offchannel.timer); 2350 ath_scan_complete(sc, true); 2351 mutex_unlock(&sc->mutex); 2352 } 2353 2354 static int ath9k_remain_on_channel(struct ieee80211_hw *hw, 2355 struct ieee80211_vif *vif, 2356 struct ieee80211_channel *chan, int duration, 2357 enum ieee80211_roc_type type) 2358 { 2359 struct ath_softc *sc = hw->priv; 2360 struct ath_common *common = ath9k_hw_common(sc->sc_ah); 2361 int ret = 0; 2362 2363 mutex_lock(&sc->mutex); 2364 2365 if (WARN_ON(sc->offchannel.roc_vif)) { 2366 ret = -EBUSY; 2367 goto out; 2368 } 2369 2370 ath9k_ps_wakeup(sc); 2371 sc->offchannel.roc_vif = vif; 2372 sc->offchannel.roc_chan = chan; 2373 sc->offchannel.roc_duration = duration; 2374 2375 ath_dbg(common, CHAN_CTX, 2376 "RoC request on vif: %pM, type: %d duration: %d\n", 2377 vif->addr, type, duration); 2378 2379 if (sc->offchannel.state == ATH_OFFCHANNEL_IDLE) { 2380 ath_dbg(common, CHAN_CTX, "Starting RoC period\n"); 2381 ath_offchannel_next(sc); 2382 } 2383 2384 out: 2385 mutex_unlock(&sc->mutex); 2386 2387 return ret; 2388 } 2389 2390 static int ath9k_cancel_remain_on_channel(struct ieee80211_hw *hw) 2391 { 2392 struct ath_softc *sc = hw->priv; 2393 struct ath_common *common = ath9k_hw_common(sc->sc_ah); 2394 2395 mutex_lock(&sc->mutex); 2396 2397 ath_dbg(common, CHAN_CTX, "Cancel RoC\n"); 2398 del_timer_sync(&sc->offchannel.timer); 2399 2400 if (sc->offchannel.roc_vif) { 2401 if (sc->offchannel.state >= ATH_OFFCHANNEL_ROC_START) 2402 ath_roc_complete(sc, ATH_ROC_COMPLETE_CANCEL); 2403 } 2404 2405 mutex_unlock(&sc->mutex); 2406 2407 return 0; 2408 } 2409 2410 static int ath9k_add_chanctx(struct ieee80211_hw *hw, 2411 struct ieee80211_chanctx_conf *conf) 2412 { 2413 struct ath_softc *sc = hw->priv; 2414 struct ath_common *common = ath9k_hw_common(sc->sc_ah); 2415 struct ath_chanctx *ctx, **ptr; 2416 int pos; 2417 2418 mutex_lock(&sc->mutex); 2419 2420 ath_for_each_chanctx(sc, ctx) { 2421 if (ctx->assigned) 2422 continue; 2423 2424 ptr = (void *) conf->drv_priv; 2425 *ptr = ctx; 2426 ctx->assigned = true; 2427 pos = ctx - &sc->chanctx[0]; 2428 ctx->hw_queue_base = pos * IEEE80211_NUM_ACS; 2429 2430 ath_dbg(common, CHAN_CTX, 2431 "Add channel context: %d MHz\n", 2432 conf->def.chan->center_freq); 2433 2434 ath_chanctx_set_channel(sc, ctx, &conf->def); 2435 2436 mutex_unlock(&sc->mutex); 2437 return 0; 2438 } 2439 2440 mutex_unlock(&sc->mutex); 2441 return -ENOSPC; 2442 } 2443 2444 2445 static void ath9k_remove_chanctx(struct ieee80211_hw *hw, 2446 struct ieee80211_chanctx_conf *conf) 2447 { 2448 struct ath_softc *sc = hw->priv; 2449 struct ath_common *common = ath9k_hw_common(sc->sc_ah); 2450 struct ath_chanctx *ctx = ath_chanctx_get(conf); 2451 2452 mutex_lock(&sc->mutex); 2453 2454 ath_dbg(common, CHAN_CTX, 2455 "Remove channel context: %d MHz\n", 2456 conf->def.chan->center_freq); 2457 2458 ctx->assigned = false; 2459 ctx->hw_queue_base = 0; 2460 ath_chanctx_event(sc, NULL, ATH_CHANCTX_EVENT_UNASSIGN); 2461 2462 mutex_unlock(&sc->mutex); 2463 } 2464 2465 static void ath9k_change_chanctx(struct ieee80211_hw *hw, 2466 struct ieee80211_chanctx_conf *conf, 2467 u32 changed) 2468 { 2469 struct ath_softc *sc = hw->priv; 2470 struct ath_common *common = ath9k_hw_common(sc->sc_ah); 2471 struct ath_chanctx *ctx = ath_chanctx_get(conf); 2472 2473 mutex_lock(&sc->mutex); 2474 ath_dbg(common, CHAN_CTX, 2475 "Change channel context: %d MHz\n", 2476 conf->def.chan->center_freq); 2477 ath_chanctx_set_channel(sc, ctx, &conf->def); 2478 mutex_unlock(&sc->mutex); 2479 } 2480 2481 static int ath9k_assign_vif_chanctx(struct ieee80211_hw *hw, 2482 struct ieee80211_vif *vif, 2483 struct ieee80211_chanctx_conf *conf) 2484 { 2485 struct ath_softc *sc = hw->priv; 2486 struct ath_common *common = ath9k_hw_common(sc->sc_ah); 2487 struct ath_vif *avp = (void *)vif->drv_priv; 2488 struct ath_chanctx *ctx = ath_chanctx_get(conf); 2489 int i; 2490 2491 ath9k_cancel_pending_offchannel(sc); 2492 2493 mutex_lock(&sc->mutex); 2494 2495 ath_dbg(common, CHAN_CTX, 2496 "Assign VIF (addr: %pM, type: %d, p2p: %d) to channel context: %d MHz\n", 2497 vif->addr, vif->type, vif->p2p, 2498 conf->def.chan->center_freq); 2499 2500 avp->chanctx = ctx; 2501 ctx->nvifs_assigned++; 2502 list_add_tail(&avp->list, &ctx->vifs); 2503 ath9k_calculate_summary_state(sc, ctx); 2504 for (i = 0; i < IEEE80211_NUM_ACS; i++) 2505 vif->hw_queue[i] = ctx->hw_queue_base + i; 2506 2507 mutex_unlock(&sc->mutex); 2508 2509 return 0; 2510 } 2511 2512 static void ath9k_unassign_vif_chanctx(struct ieee80211_hw *hw, 2513 struct ieee80211_vif *vif, 2514 struct ieee80211_chanctx_conf *conf) 2515 { 2516 struct ath_softc *sc = hw->priv; 2517 struct ath_common *common = ath9k_hw_common(sc->sc_ah); 2518 struct ath_vif *avp = (void *)vif->drv_priv; 2519 struct ath_chanctx *ctx = ath_chanctx_get(conf); 2520 int ac; 2521 2522 ath9k_cancel_pending_offchannel(sc); 2523 2524 mutex_lock(&sc->mutex); 2525 2526 ath_dbg(common, CHAN_CTX, 2527 "Remove VIF (addr: %pM, type: %d, p2p: %d) from channel context: %d MHz\n", 2528 vif->addr, vif->type, vif->p2p, 2529 conf->def.chan->center_freq); 2530 2531 avp->chanctx = NULL; 2532 ctx->nvifs_assigned--; 2533 list_del(&avp->list); 2534 ath9k_calculate_summary_state(sc, ctx); 2535 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 2536 vif->hw_queue[ac] = IEEE80211_INVAL_HW_QUEUE; 2537 2538 mutex_unlock(&sc->mutex); 2539 } 2540 2541 static void ath9k_mgd_prepare_tx(struct ieee80211_hw *hw, 2542 struct ieee80211_vif *vif, 2543 u16 duration) 2544 { 2545 struct ath_softc *sc = hw->priv; 2546 struct ath_common *common = ath9k_hw_common(sc->sc_ah); 2547 struct ath_vif *avp = (struct ath_vif *) vif->drv_priv; 2548 struct ath_beacon_config *cur_conf; 2549 struct ath_chanctx *go_ctx; 2550 unsigned long timeout; 2551 bool changed = false; 2552 u32 beacon_int; 2553 2554 if (!test_bit(ATH_OP_MULTI_CHANNEL, &common->op_flags)) 2555 return; 2556 2557 if (!avp->chanctx) 2558 return; 2559 2560 mutex_lock(&sc->mutex); 2561 2562 spin_lock_bh(&sc->chan_lock); 2563 if (sc->next_chan || (sc->cur_chan != avp->chanctx)) 2564 changed = true; 2565 spin_unlock_bh(&sc->chan_lock); 2566 2567 if (!changed) 2568 goto out; 2569 2570 ath9k_cancel_pending_offchannel(sc); 2571 2572 go_ctx = ath_is_go_chanctx_present(sc); 2573 2574 if (go_ctx) { 2575 /* 2576 * Wait till the GO interface gets a chance 2577 * to send out an NoA. 2578 */ 2579 spin_lock_bh(&sc->chan_lock); 2580 sc->sched.mgd_prepare_tx = true; 2581 cur_conf = &go_ctx->beacon; 2582 beacon_int = TU_TO_USEC(cur_conf->beacon_interval); 2583 spin_unlock_bh(&sc->chan_lock); 2584 2585 timeout = usecs_to_jiffies(beacon_int * 2); 2586 init_completion(&sc->go_beacon); 2587 2588 mutex_unlock(&sc->mutex); 2589 2590 if (wait_for_completion_timeout(&sc->go_beacon, 2591 timeout) == 0) { 2592 ath_dbg(common, CHAN_CTX, 2593 "Failed to send new NoA\n"); 2594 2595 spin_lock_bh(&sc->chan_lock); 2596 sc->sched.mgd_prepare_tx = false; 2597 spin_unlock_bh(&sc->chan_lock); 2598 } 2599 2600 mutex_lock(&sc->mutex); 2601 } 2602 2603 ath_dbg(common, CHAN_CTX, 2604 "%s: Set chanctx state to FORCE_ACTIVE for vif: %pM\n", 2605 __func__, vif->addr); 2606 2607 spin_lock_bh(&sc->chan_lock); 2608 sc->next_chan = avp->chanctx; 2609 sc->sched.state = ATH_CHANCTX_STATE_FORCE_ACTIVE; 2610 spin_unlock_bh(&sc->chan_lock); 2611 2612 ath_chanctx_set_next(sc, true); 2613 out: 2614 mutex_unlock(&sc->mutex); 2615 } 2616 2617 void ath9k_fill_chanctx_ops(void) 2618 { 2619 if (!ath9k_is_chanctx_enabled()) 2620 return; 2621 2622 ath9k_ops.hw_scan = ath9k_hw_scan; 2623 ath9k_ops.cancel_hw_scan = ath9k_cancel_hw_scan; 2624 ath9k_ops.remain_on_channel = ath9k_remain_on_channel; 2625 ath9k_ops.cancel_remain_on_channel = ath9k_cancel_remain_on_channel; 2626 ath9k_ops.add_chanctx = ath9k_add_chanctx; 2627 ath9k_ops.remove_chanctx = ath9k_remove_chanctx; 2628 ath9k_ops.change_chanctx = ath9k_change_chanctx; 2629 ath9k_ops.assign_vif_chanctx = ath9k_assign_vif_chanctx; 2630 ath9k_ops.unassign_vif_chanctx = ath9k_unassign_vif_chanctx; 2631 ath9k_ops.mgd_prepare_tx = ath9k_mgd_prepare_tx; 2632 } 2633 2634 #endif 2635 2636 static int ath9k_get_txpower(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2637 int *dbm) 2638 { 2639 struct ath_softc *sc = hw->priv; 2640 struct ath_vif *avp = (void *)vif->drv_priv; 2641 2642 mutex_lock(&sc->mutex); 2643 if (avp->chanctx) 2644 *dbm = avp->chanctx->cur_txpower; 2645 else 2646 *dbm = sc->cur_chan->cur_txpower; 2647 mutex_unlock(&sc->mutex); 2648 2649 *dbm /= 2; 2650 2651 return 0; 2652 } 2653 2654 struct ieee80211_ops ath9k_ops = { 2655 .tx = ath9k_tx, 2656 .start = ath9k_start, 2657 .stop = ath9k_stop, 2658 .add_interface = ath9k_add_interface, 2659 .change_interface = ath9k_change_interface, 2660 .remove_interface = ath9k_remove_interface, 2661 .config = ath9k_config, 2662 .configure_filter = ath9k_configure_filter, 2663 .sta_state = ath9k_sta_state, 2664 .sta_notify = ath9k_sta_notify, 2665 .conf_tx = ath9k_conf_tx, 2666 .bss_info_changed = ath9k_bss_info_changed, 2667 .set_key = ath9k_set_key, 2668 .get_tsf = ath9k_get_tsf, 2669 .set_tsf = ath9k_set_tsf, 2670 .reset_tsf = ath9k_reset_tsf, 2671 .ampdu_action = ath9k_ampdu_action, 2672 .get_survey = ath9k_get_survey, 2673 .rfkill_poll = ath9k_rfkill_poll_state, 2674 .set_coverage_class = ath9k_set_coverage_class, 2675 .flush = ath9k_flush, 2676 .tx_frames_pending = ath9k_tx_frames_pending, 2677 .tx_last_beacon = ath9k_tx_last_beacon, 2678 .release_buffered_frames = ath9k_release_buffered_frames, 2679 .get_stats = ath9k_get_stats, 2680 .set_antenna = ath9k_set_antenna, 2681 .get_antenna = ath9k_get_antenna, 2682 2683 #ifdef CONFIG_ATH9K_WOW 2684 .suspend = ath9k_suspend, 2685 .resume = ath9k_resume, 2686 .set_wakeup = ath9k_set_wakeup, 2687 #endif 2688 2689 #ifdef CONFIG_ATH9K_DEBUGFS 2690 .get_et_sset_count = ath9k_get_et_sset_count, 2691 .get_et_stats = ath9k_get_et_stats, 2692 .get_et_strings = ath9k_get_et_strings, 2693 #endif 2694 2695 #if defined(CONFIG_MAC80211_DEBUGFS) && defined(CONFIG_ATH9K_STATION_STATISTICS) 2696 .sta_add_debugfs = ath9k_sta_add_debugfs, 2697 #endif 2698 .sw_scan_start = ath9k_sw_scan_start, 2699 .sw_scan_complete = ath9k_sw_scan_complete, 2700 .get_txpower = ath9k_get_txpower, 2701 .wake_tx_queue = ath9k_wake_tx_queue, 2702 }; 2703