1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Mac80211 STA API for ST-Ericsson CW1200 drivers 4 * 5 * Copyright (c) 2010, ST-Ericsson 6 * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no> 7 */ 8 9 #include <linux/vmalloc.h> 10 #include <linux/sched.h> 11 #include <linux/firmware.h> 12 #include <linux/module.h> 13 #include <linux/etherdevice.h> 14 15 #include "cw1200.h" 16 #include "sta.h" 17 #include "fwio.h" 18 #include "bh.h" 19 #include "debug.h" 20 21 #ifndef ERP_INFO_BYTE_OFFSET 22 #define ERP_INFO_BYTE_OFFSET 2 23 #endif 24 25 static void cw1200_do_join(struct cw1200_common *priv); 26 static void cw1200_do_unjoin(struct cw1200_common *priv); 27 28 static int cw1200_upload_beacon(struct cw1200_common *priv); 29 static int cw1200_upload_pspoll(struct cw1200_common *priv); 30 static int cw1200_upload_null(struct cw1200_common *priv); 31 static int cw1200_upload_qosnull(struct cw1200_common *priv); 32 static int cw1200_start_ap(struct cw1200_common *priv); 33 static int cw1200_update_beaconing(struct cw1200_common *priv); 34 static int cw1200_enable_beaconing(struct cw1200_common *priv, 35 bool enable); 36 static void __cw1200_sta_notify(struct ieee80211_hw *dev, 37 struct ieee80211_vif *vif, 38 enum sta_notify_cmd notify_cmd, 39 int link_id); 40 static int __cw1200_flush(struct cw1200_common *priv, bool drop); 41 42 static inline void __cw1200_free_event_queue(struct list_head *list) 43 { 44 struct cw1200_wsm_event *event, *tmp; 45 list_for_each_entry_safe(event, tmp, list, link) { 46 list_del(&event->link); 47 kfree(event); 48 } 49 } 50 51 /* ******************************************************************** */ 52 /* STA API */ 53 54 int cw1200_start(struct ieee80211_hw *dev) 55 { 56 struct cw1200_common *priv = dev->priv; 57 int ret = 0; 58 59 cw1200_pm_stay_awake(&priv->pm_state, HZ); 60 61 mutex_lock(&priv->conf_mutex); 62 63 /* default EDCA */ 64 WSM_EDCA_SET(&priv->edca, 0, 0x0002, 0x0003, 0x0007, 47, 0xc8, false); 65 WSM_EDCA_SET(&priv->edca, 1, 0x0002, 0x0007, 0x000f, 94, 0xc8, false); 66 WSM_EDCA_SET(&priv->edca, 2, 0x0003, 0x000f, 0x03ff, 0, 0xc8, false); 67 WSM_EDCA_SET(&priv->edca, 3, 0x0007, 0x000f, 0x03ff, 0, 0xc8, false); 68 ret = wsm_set_edca_params(priv, &priv->edca); 69 if (ret) 70 goto out; 71 72 ret = cw1200_set_uapsd_param(priv, &priv->edca); 73 if (ret) 74 goto out; 75 76 priv->setbssparams_done = false; 77 78 memcpy(priv->mac_addr, dev->wiphy->perm_addr, ETH_ALEN); 79 priv->mode = NL80211_IFTYPE_MONITOR; 80 priv->wep_default_key_id = -1; 81 82 priv->cqm_beacon_loss_count = 10; 83 84 ret = cw1200_setup_mac(priv); 85 if (ret) 86 goto out; 87 88 out: 89 mutex_unlock(&priv->conf_mutex); 90 return ret; 91 } 92 93 void cw1200_stop(struct ieee80211_hw *dev, bool suspend) 94 { 95 struct cw1200_common *priv = dev->priv; 96 LIST_HEAD(list); 97 int i; 98 99 wsm_lock_tx(priv); 100 101 while (down_trylock(&priv->scan.lock)) { 102 /* Scan is in progress. Force it to stop. */ 103 priv->scan.req = NULL; 104 schedule(); 105 } 106 up(&priv->scan.lock); 107 108 cancel_delayed_work_sync(&priv->scan.probe_work); 109 cancel_delayed_work_sync(&priv->scan.timeout); 110 cancel_delayed_work_sync(&priv->clear_recent_scan_work); 111 cancel_delayed_work_sync(&priv->join_timeout); 112 cw1200_cqm_bssloss_sm(priv, 0, 0, 0); 113 cancel_work_sync(&priv->unjoin_work); 114 cancel_delayed_work_sync(&priv->link_id_gc_work); 115 flush_workqueue(priv->workqueue); 116 del_timer_sync(&priv->mcast_timeout); 117 mutex_lock(&priv->conf_mutex); 118 priv->mode = NL80211_IFTYPE_UNSPECIFIED; 119 priv->listening = false; 120 121 spin_lock(&priv->event_queue_lock); 122 list_splice_init(&priv->event_queue, &list); 123 spin_unlock(&priv->event_queue_lock); 124 __cw1200_free_event_queue(&list); 125 126 127 priv->join_status = CW1200_JOIN_STATUS_PASSIVE; 128 priv->join_pending = false; 129 130 for (i = 0; i < 4; i++) 131 cw1200_queue_clear(&priv->tx_queue[i]); 132 mutex_unlock(&priv->conf_mutex); 133 tx_policy_clean(priv); 134 135 /* HACK! */ 136 if (atomic_xchg(&priv->tx_lock, 1) != 1) 137 pr_debug("[STA] TX is force-unlocked due to stop request.\n"); 138 139 wsm_unlock_tx(priv); 140 atomic_xchg(&priv->tx_lock, 0); /* for recovery to work */ 141 } 142 143 static int cw1200_bssloss_mitigation = 1; 144 module_param(cw1200_bssloss_mitigation, int, 0644); 145 MODULE_PARM_DESC(cw1200_bssloss_mitigation, "BSS Loss mitigation. 0 == disabled, 1 == enabled (default)"); 146 147 148 void __cw1200_cqm_bssloss_sm(struct cw1200_common *priv, 149 int init, int good, int bad) 150 { 151 int tx = 0; 152 153 priv->delayed_link_loss = 0; 154 cancel_work_sync(&priv->bss_params_work); 155 156 pr_debug("[STA] CQM BSSLOSS_SM: state: %d init %d good %d bad: %d txlock: %d uj: %d\n", 157 priv->bss_loss_state, 158 init, good, bad, 159 atomic_read(&priv->tx_lock), 160 priv->delayed_unjoin); 161 162 /* If we have a pending unjoin */ 163 if (priv->delayed_unjoin) 164 return; 165 166 if (init) { 167 queue_delayed_work(priv->workqueue, 168 &priv->bss_loss_work, 169 HZ); 170 priv->bss_loss_state = 0; 171 172 /* Skip the confimration procedure in P2P case */ 173 if (!priv->vif->p2p && !atomic_read(&priv->tx_lock)) 174 tx = 1; 175 } else if (good) { 176 cancel_delayed_work_sync(&priv->bss_loss_work); 177 priv->bss_loss_state = 0; 178 queue_work(priv->workqueue, &priv->bss_params_work); 179 } else if (bad) { 180 /* XXX Should we just keep going until we time out? */ 181 if (priv->bss_loss_state < 3) 182 tx = 1; 183 } else { 184 cancel_delayed_work_sync(&priv->bss_loss_work); 185 priv->bss_loss_state = 0; 186 } 187 188 /* Bypass mitigation if it's disabled */ 189 if (!cw1200_bssloss_mitigation) 190 tx = 0; 191 192 /* Spit out a NULL packet to our AP if necessary */ 193 if (tx) { 194 struct sk_buff *skb; 195 196 priv->bss_loss_state++; 197 198 skb = ieee80211_nullfunc_get(priv->hw, priv->vif, -1, false); 199 WARN_ON(!skb); 200 if (skb) 201 cw1200_tx(priv->hw, NULL, skb); 202 } 203 } 204 205 int cw1200_add_interface(struct ieee80211_hw *dev, 206 struct ieee80211_vif *vif) 207 { 208 int ret; 209 struct cw1200_common *priv = dev->priv; 210 /* __le32 auto_calibration_mode = __cpu_to_le32(1); */ 211 212 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER | 213 IEEE80211_VIF_SUPPORTS_UAPSD | 214 IEEE80211_VIF_SUPPORTS_CQM_RSSI; 215 216 mutex_lock(&priv->conf_mutex); 217 218 if (priv->mode != NL80211_IFTYPE_MONITOR) { 219 mutex_unlock(&priv->conf_mutex); 220 return -EOPNOTSUPP; 221 } 222 223 switch (vif->type) { 224 case NL80211_IFTYPE_STATION: 225 case NL80211_IFTYPE_ADHOC: 226 case NL80211_IFTYPE_MESH_POINT: 227 case NL80211_IFTYPE_AP: 228 priv->mode = vif->type; 229 break; 230 default: 231 mutex_unlock(&priv->conf_mutex); 232 return -EOPNOTSUPP; 233 } 234 235 priv->vif = vif; 236 memcpy(priv->mac_addr, vif->addr, ETH_ALEN); 237 ret = cw1200_setup_mac(priv); 238 /* Enable auto-calibration */ 239 /* Exception in subsequent channel switch; disabled. 240 * wsm_write_mib(priv, WSM_MIB_ID_SET_AUTO_CALIBRATION_MODE, 241 * &auto_calibration_mode, sizeof(auto_calibration_mode)); 242 */ 243 244 mutex_unlock(&priv->conf_mutex); 245 return ret; 246 } 247 248 void cw1200_remove_interface(struct ieee80211_hw *dev, 249 struct ieee80211_vif *vif) 250 { 251 struct cw1200_common *priv = dev->priv; 252 struct wsm_reset reset = { 253 .reset_statistics = true, 254 }; 255 int i; 256 257 mutex_lock(&priv->conf_mutex); 258 switch (priv->join_status) { 259 case CW1200_JOIN_STATUS_JOINING: 260 case CW1200_JOIN_STATUS_PRE_STA: 261 case CW1200_JOIN_STATUS_STA: 262 case CW1200_JOIN_STATUS_IBSS: 263 wsm_lock_tx(priv); 264 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0) 265 wsm_unlock_tx(priv); 266 break; 267 case CW1200_JOIN_STATUS_AP: 268 for (i = 0; priv->link_id_map; ++i) { 269 if (priv->link_id_map & BIT(i)) { 270 reset.link_id = i; 271 wsm_reset(priv, &reset); 272 priv->link_id_map &= ~BIT(i); 273 } 274 } 275 memset(priv->link_id_db, 0, sizeof(priv->link_id_db)); 276 priv->sta_asleep_mask = 0; 277 priv->enable_beacon = false; 278 priv->tx_multicast = false; 279 priv->aid0_bit_set = false; 280 priv->buffered_multicasts = false; 281 priv->pspoll_mask = 0; 282 reset.link_id = 0; 283 wsm_reset(priv, &reset); 284 break; 285 case CW1200_JOIN_STATUS_MONITOR: 286 cw1200_update_listening(priv, false); 287 break; 288 default: 289 break; 290 } 291 priv->vif = NULL; 292 priv->mode = NL80211_IFTYPE_MONITOR; 293 eth_zero_addr(priv->mac_addr); 294 memset(&priv->p2p_ps_modeinfo, 0, sizeof(priv->p2p_ps_modeinfo)); 295 cw1200_free_keys(priv); 296 cw1200_setup_mac(priv); 297 priv->listening = false; 298 priv->join_status = CW1200_JOIN_STATUS_PASSIVE; 299 if (!__cw1200_flush(priv, true)) 300 wsm_unlock_tx(priv); 301 302 mutex_unlock(&priv->conf_mutex); 303 } 304 305 int cw1200_change_interface(struct ieee80211_hw *dev, 306 struct ieee80211_vif *vif, 307 enum nl80211_iftype new_type, 308 bool p2p) 309 { 310 int ret = 0; 311 pr_debug("change_interface new: %d (%d), old: %d (%d)\n", new_type, 312 p2p, vif->type, vif->p2p); 313 314 if (new_type != vif->type || vif->p2p != p2p) { 315 cw1200_remove_interface(dev, vif); 316 vif->type = new_type; 317 vif->p2p = p2p; 318 ret = cw1200_add_interface(dev, vif); 319 } 320 321 return ret; 322 } 323 324 int cw1200_config(struct ieee80211_hw *dev, u32 changed) 325 { 326 int ret = 0; 327 struct cw1200_common *priv = dev->priv; 328 struct ieee80211_conf *conf = &dev->conf; 329 330 pr_debug("CONFIG CHANGED: %08x\n", changed); 331 332 down(&priv->scan.lock); 333 mutex_lock(&priv->conf_mutex); 334 /* TODO: IEEE80211_CONF_CHANGE_QOS */ 335 /* TODO: IEEE80211_CONF_CHANGE_LISTEN_INTERVAL */ 336 337 if (changed & IEEE80211_CONF_CHANGE_POWER) { 338 priv->output_power = conf->power_level; 339 pr_debug("[STA] TX power: %d\n", priv->output_power); 340 wsm_set_output_power(priv, priv->output_power * 10); 341 } 342 343 if ((changed & IEEE80211_CONF_CHANGE_CHANNEL) && 344 (priv->channel != conf->chandef.chan)) { 345 struct ieee80211_channel *ch = conf->chandef.chan; 346 struct wsm_switch_channel channel = { 347 .channel_number = ch->hw_value, 348 }; 349 pr_debug("[STA] Freq %d (wsm ch: %d).\n", 350 ch->center_freq, ch->hw_value); 351 352 /* __cw1200_flush() implicitly locks tx, if successful */ 353 if (!__cw1200_flush(priv, false)) { 354 if (!wsm_switch_channel(priv, &channel)) { 355 ret = wait_event_timeout(priv->channel_switch_done, 356 !priv->channel_switch_in_progress, 357 3 * HZ); 358 if (ret) { 359 /* Already unlocks if successful */ 360 priv->channel = ch; 361 ret = 0; 362 } else { 363 ret = -ETIMEDOUT; 364 } 365 } else { 366 /* Unlock if switch channel fails */ 367 wsm_unlock_tx(priv); 368 } 369 } 370 } 371 372 if (changed & IEEE80211_CONF_CHANGE_PS) { 373 if (!(conf->flags & IEEE80211_CONF_PS)) 374 priv->powersave_mode.mode = WSM_PSM_ACTIVE; 375 else if (conf->dynamic_ps_timeout <= 0) 376 priv->powersave_mode.mode = WSM_PSM_PS; 377 else 378 priv->powersave_mode.mode = WSM_PSM_FAST_PS; 379 380 /* Firmware requires that value for this 1-byte field must 381 * be specified in units of 500us. Values above the 128ms 382 * threshold are not supported. 383 */ 384 if (conf->dynamic_ps_timeout >= 0x80) 385 priv->powersave_mode.fast_psm_idle_period = 0xFF; 386 else 387 priv->powersave_mode.fast_psm_idle_period = 388 conf->dynamic_ps_timeout << 1; 389 390 if (priv->join_status == CW1200_JOIN_STATUS_STA && 391 priv->bss_params.aid) 392 cw1200_set_pm(priv, &priv->powersave_mode); 393 } 394 395 if (changed & IEEE80211_CONF_CHANGE_MONITOR) { 396 /* TBD: It looks like it's transparent 397 * there's a monitor interface present -- use this 398 * to determine for example whether to calculate 399 * timestamps for packets or not, do not use instead 400 * of filter flags! 401 */ 402 } 403 404 if (changed & IEEE80211_CONF_CHANGE_IDLE) { 405 struct wsm_operational_mode mode = { 406 .power_mode = cw1200_power_mode, 407 .disable_more_flag_usage = true, 408 }; 409 410 wsm_lock_tx(priv); 411 /* Disable p2p-dev mode forced by TX request */ 412 if ((priv->join_status == CW1200_JOIN_STATUS_MONITOR) && 413 (conf->flags & IEEE80211_CONF_IDLE) && 414 !priv->listening) { 415 cw1200_disable_listening(priv); 416 priv->join_status = CW1200_JOIN_STATUS_PASSIVE; 417 } 418 wsm_set_operational_mode(priv, &mode); 419 wsm_unlock_tx(priv); 420 } 421 422 if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS) { 423 pr_debug("[STA] Retry limits: %d (long), %d (short).\n", 424 conf->long_frame_max_tx_count, 425 conf->short_frame_max_tx_count); 426 spin_lock_bh(&priv->tx_policy_cache.lock); 427 priv->long_frame_max_tx_count = conf->long_frame_max_tx_count; 428 priv->short_frame_max_tx_count = 429 (conf->short_frame_max_tx_count < 0x0F) ? 430 conf->short_frame_max_tx_count : 0x0F; 431 priv->hw->max_rate_tries = priv->short_frame_max_tx_count; 432 spin_unlock_bh(&priv->tx_policy_cache.lock); 433 } 434 mutex_unlock(&priv->conf_mutex); 435 up(&priv->scan.lock); 436 return ret; 437 } 438 439 void cw1200_update_filtering(struct cw1200_common *priv) 440 { 441 int ret; 442 bool bssid_filtering = !priv->rx_filter.bssid; 443 bool is_p2p = priv->vif && priv->vif->p2p; 444 bool is_sta = priv->vif && NL80211_IFTYPE_STATION == priv->vif->type; 445 446 static struct wsm_beacon_filter_control bf_ctrl; 447 static struct wsm_mib_beacon_filter_table bf_tbl = { 448 .entry[0].ie_id = WLAN_EID_VENDOR_SPECIFIC, 449 .entry[0].flags = WSM_BEACON_FILTER_IE_HAS_CHANGED | 450 WSM_BEACON_FILTER_IE_NO_LONGER_PRESENT | 451 WSM_BEACON_FILTER_IE_HAS_APPEARED, 452 .entry[0].oui[0] = 0x50, 453 .entry[0].oui[1] = 0x6F, 454 .entry[0].oui[2] = 0x9A, 455 .entry[1].ie_id = WLAN_EID_HT_OPERATION, 456 .entry[1].flags = WSM_BEACON_FILTER_IE_HAS_CHANGED | 457 WSM_BEACON_FILTER_IE_NO_LONGER_PRESENT | 458 WSM_BEACON_FILTER_IE_HAS_APPEARED, 459 .entry[2].ie_id = WLAN_EID_ERP_INFO, 460 .entry[2].flags = WSM_BEACON_FILTER_IE_HAS_CHANGED | 461 WSM_BEACON_FILTER_IE_NO_LONGER_PRESENT | 462 WSM_BEACON_FILTER_IE_HAS_APPEARED, 463 }; 464 465 if (priv->join_status == CW1200_JOIN_STATUS_PASSIVE) 466 return; 467 else if (priv->join_status == CW1200_JOIN_STATUS_MONITOR) 468 bssid_filtering = false; 469 470 if (priv->disable_beacon_filter) { 471 bf_ctrl.enabled = 0; 472 bf_ctrl.bcn_count = 1; 473 bf_tbl.num = __cpu_to_le32(0); 474 } else if (is_p2p || !is_sta) { 475 bf_ctrl.enabled = WSM_BEACON_FILTER_ENABLE | 476 WSM_BEACON_FILTER_AUTO_ERP; 477 bf_ctrl.bcn_count = 0; 478 bf_tbl.num = __cpu_to_le32(2); 479 } else { 480 bf_ctrl.enabled = WSM_BEACON_FILTER_ENABLE; 481 bf_ctrl.bcn_count = 0; 482 bf_tbl.num = __cpu_to_le32(3); 483 } 484 485 /* When acting as p2p client being connected to p2p GO, in order to 486 * receive frames from a different p2p device, turn off bssid filter. 487 * 488 * WARNING: FW dependency! 489 * This can only be used with FW WSM371 and its successors. 490 * In that FW version even with bssid filter turned off, 491 * device will block most of the unwanted frames. 492 */ 493 if (is_p2p) 494 bssid_filtering = false; 495 496 ret = wsm_set_rx_filter(priv, &priv->rx_filter); 497 if (!ret) 498 ret = wsm_set_beacon_filter_table(priv, &bf_tbl); 499 if (!ret) 500 ret = wsm_beacon_filter_control(priv, &bf_ctrl); 501 if (!ret) 502 ret = wsm_set_bssid_filtering(priv, bssid_filtering); 503 if (!ret) 504 ret = wsm_set_multicast_filter(priv, &priv->multicast_filter); 505 if (ret) 506 wiphy_err(priv->hw->wiphy, 507 "Update filtering failed: %d.\n", ret); 508 return; 509 } 510 511 void cw1200_update_filtering_work(struct work_struct *work) 512 { 513 struct cw1200_common *priv = 514 container_of(work, struct cw1200_common, 515 update_filtering_work); 516 517 cw1200_update_filtering(priv); 518 } 519 520 void cw1200_set_beacon_wakeup_period_work(struct work_struct *work) 521 { 522 struct cw1200_common *priv = 523 container_of(work, struct cw1200_common, 524 set_beacon_wakeup_period_work); 525 526 wsm_set_beacon_wakeup_period(priv, 527 priv->beacon_int * priv->join_dtim_period > 528 MAX_BEACON_SKIP_TIME_MS ? 1 : 529 priv->join_dtim_period, 0); 530 } 531 532 u64 cw1200_prepare_multicast(struct ieee80211_hw *hw, 533 struct netdev_hw_addr_list *mc_list) 534 { 535 static u8 broadcast_ipv6[ETH_ALEN] = { 536 0x33, 0x33, 0x00, 0x00, 0x00, 0x01 537 }; 538 static u8 broadcast_ipv4[ETH_ALEN] = { 539 0x01, 0x00, 0x5e, 0x00, 0x00, 0x01 540 }; 541 struct cw1200_common *priv = hw->priv; 542 struct netdev_hw_addr *ha; 543 int count = 0; 544 545 /* Disable multicast filtering */ 546 priv->has_multicast_subscription = false; 547 memset(&priv->multicast_filter, 0x00, sizeof(priv->multicast_filter)); 548 549 if (netdev_hw_addr_list_count(mc_list) > WSM_MAX_GRP_ADDRTABLE_ENTRIES) 550 return 0; 551 552 /* Enable if requested */ 553 netdev_hw_addr_list_for_each(ha, mc_list) { 554 pr_debug("[STA] multicast: %pM\n", ha->addr); 555 memcpy(&priv->multicast_filter.macaddrs[count], 556 ha->addr, ETH_ALEN); 557 if (!ether_addr_equal(ha->addr, broadcast_ipv4) && 558 !ether_addr_equal(ha->addr, broadcast_ipv6)) 559 priv->has_multicast_subscription = true; 560 count++; 561 } 562 563 if (count) { 564 priv->multicast_filter.enable = __cpu_to_le32(1); 565 priv->multicast_filter.num_addrs = __cpu_to_le32(count); 566 } 567 568 return netdev_hw_addr_list_count(mc_list); 569 } 570 571 void cw1200_configure_filter(struct ieee80211_hw *dev, 572 unsigned int changed_flags, 573 unsigned int *total_flags, 574 u64 multicast) 575 { 576 struct cw1200_common *priv = dev->priv; 577 bool listening = !!(*total_flags & 578 (FIF_OTHER_BSS | 579 FIF_BCN_PRBRESP_PROMISC | 580 FIF_PROBE_REQ)); 581 582 *total_flags &= FIF_OTHER_BSS | 583 FIF_FCSFAIL | 584 FIF_BCN_PRBRESP_PROMISC | 585 FIF_PROBE_REQ; 586 587 down(&priv->scan.lock); 588 mutex_lock(&priv->conf_mutex); 589 590 priv->rx_filter.promiscuous = 0; 591 priv->rx_filter.bssid = (*total_flags & (FIF_OTHER_BSS | 592 FIF_PROBE_REQ)) ? 1 : 0; 593 priv->rx_filter.fcs = (*total_flags & FIF_FCSFAIL) ? 1 : 0; 594 priv->disable_beacon_filter = !(*total_flags & 595 (FIF_BCN_PRBRESP_PROMISC | 596 FIF_PROBE_REQ)); 597 if (priv->listening != listening) { 598 priv->listening = listening; 599 wsm_lock_tx(priv); 600 cw1200_update_listening(priv, listening); 601 wsm_unlock_tx(priv); 602 } 603 cw1200_update_filtering(priv); 604 mutex_unlock(&priv->conf_mutex); 605 up(&priv->scan.lock); 606 } 607 608 int cw1200_conf_tx(struct ieee80211_hw *dev, struct ieee80211_vif *vif, 609 unsigned int link_id, u16 queue, 610 const struct ieee80211_tx_queue_params *params) 611 { 612 struct cw1200_common *priv = dev->priv; 613 int ret = 0; 614 /* To prevent re-applying PM request OID again and again*/ 615 bool old_uapsd_flags; 616 617 mutex_lock(&priv->conf_mutex); 618 619 if (queue < dev->queues) { 620 old_uapsd_flags = le16_to_cpu(priv->uapsd_info.uapsd_flags); 621 622 WSM_TX_QUEUE_SET(&priv->tx_queue_params, queue, 0, 0, 0); 623 ret = wsm_set_tx_queue_params(priv, 624 &priv->tx_queue_params.params[queue], queue); 625 if (ret) { 626 ret = -EINVAL; 627 goto out; 628 } 629 630 WSM_EDCA_SET(&priv->edca, queue, params->aifs, 631 params->cw_min, params->cw_max, 632 params->txop, 0xc8, 633 params->uapsd); 634 ret = wsm_set_edca_params(priv, &priv->edca); 635 if (ret) { 636 ret = -EINVAL; 637 goto out; 638 } 639 640 if (priv->mode == NL80211_IFTYPE_STATION) { 641 ret = cw1200_set_uapsd_param(priv, &priv->edca); 642 if (!ret && priv->setbssparams_done && 643 (priv->join_status == CW1200_JOIN_STATUS_STA) && 644 (old_uapsd_flags != le16_to_cpu(priv->uapsd_info.uapsd_flags))) 645 ret = cw1200_set_pm(priv, &priv->powersave_mode); 646 } 647 } else { 648 ret = -EINVAL; 649 } 650 651 out: 652 mutex_unlock(&priv->conf_mutex); 653 return ret; 654 } 655 656 int cw1200_get_stats(struct ieee80211_hw *dev, 657 struct ieee80211_low_level_stats *stats) 658 { 659 struct cw1200_common *priv = dev->priv; 660 661 memcpy(stats, &priv->stats, sizeof(*stats)); 662 return 0; 663 } 664 665 int cw1200_set_pm(struct cw1200_common *priv, const struct wsm_set_pm *arg) 666 { 667 struct wsm_set_pm pm = *arg; 668 669 if (priv->uapsd_info.uapsd_flags != 0) 670 pm.mode &= ~WSM_PSM_FAST_PS_FLAG; 671 672 if (memcmp(&pm, &priv->firmware_ps_mode, 673 sizeof(struct wsm_set_pm))) { 674 priv->firmware_ps_mode = pm; 675 return wsm_set_pm(priv, &pm); 676 } else { 677 return 0; 678 } 679 } 680 681 int cw1200_set_key(struct ieee80211_hw *dev, enum set_key_cmd cmd, 682 struct ieee80211_vif *vif, struct ieee80211_sta *sta, 683 struct ieee80211_key_conf *key) 684 { 685 int ret = -EOPNOTSUPP; 686 struct cw1200_common *priv = dev->priv; 687 struct ieee80211_key_seq seq; 688 689 mutex_lock(&priv->conf_mutex); 690 691 if (cmd == SET_KEY) { 692 u8 *peer_addr = NULL; 693 int pairwise = (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) ? 694 1 : 0; 695 int idx = cw1200_alloc_key(priv); 696 struct wsm_add_key *wsm_key = &priv->keys[idx]; 697 698 if (idx < 0) { 699 ret = -EINVAL; 700 goto finally; 701 } 702 703 if (sta) 704 peer_addr = sta->addr; 705 706 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE | 707 IEEE80211_KEY_FLAG_RESERVE_TAILROOM; 708 709 switch (key->cipher) { 710 case WLAN_CIPHER_SUITE_WEP40: 711 case WLAN_CIPHER_SUITE_WEP104: 712 if (key->keylen > 16) { 713 cw1200_free_key(priv, idx); 714 ret = -EINVAL; 715 goto finally; 716 } 717 718 if (pairwise) { 719 wsm_key->type = WSM_KEY_TYPE_WEP_PAIRWISE; 720 memcpy(wsm_key->wep_pairwise.peer, 721 peer_addr, ETH_ALEN); 722 memcpy(wsm_key->wep_pairwise.keydata, 723 &key->key[0], key->keylen); 724 wsm_key->wep_pairwise.keylen = key->keylen; 725 } else { 726 wsm_key->type = WSM_KEY_TYPE_WEP_DEFAULT; 727 memcpy(wsm_key->wep_group.keydata, 728 &key->key[0], key->keylen); 729 wsm_key->wep_group.keylen = key->keylen; 730 wsm_key->wep_group.keyid = key->keyidx; 731 } 732 break; 733 case WLAN_CIPHER_SUITE_TKIP: 734 ieee80211_get_key_rx_seq(key, 0, &seq); 735 if (pairwise) { 736 wsm_key->type = WSM_KEY_TYPE_TKIP_PAIRWISE; 737 memcpy(wsm_key->tkip_pairwise.peer, 738 peer_addr, ETH_ALEN); 739 memcpy(wsm_key->tkip_pairwise.keydata, 740 &key->key[0], 16); 741 memcpy(wsm_key->tkip_pairwise.tx_mic_key, 742 &key->key[16], 8); 743 memcpy(wsm_key->tkip_pairwise.rx_mic_key, 744 &key->key[24], 8); 745 } else { 746 size_t mic_offset = 747 (priv->mode == NL80211_IFTYPE_AP) ? 748 16 : 24; 749 wsm_key->type = WSM_KEY_TYPE_TKIP_GROUP; 750 memcpy(wsm_key->tkip_group.keydata, 751 &key->key[0], 16); 752 memcpy(wsm_key->tkip_group.rx_mic_key, 753 &key->key[mic_offset], 8); 754 755 wsm_key->tkip_group.rx_seqnum[0] = seq.tkip.iv16 & 0xff; 756 wsm_key->tkip_group.rx_seqnum[1] = (seq.tkip.iv16 >> 8) & 0xff; 757 wsm_key->tkip_group.rx_seqnum[2] = seq.tkip.iv32 & 0xff; 758 wsm_key->tkip_group.rx_seqnum[3] = (seq.tkip.iv32 >> 8) & 0xff; 759 wsm_key->tkip_group.rx_seqnum[4] = (seq.tkip.iv32 >> 16) & 0xff; 760 wsm_key->tkip_group.rx_seqnum[5] = (seq.tkip.iv32 >> 24) & 0xff; 761 wsm_key->tkip_group.rx_seqnum[6] = 0; 762 wsm_key->tkip_group.rx_seqnum[7] = 0; 763 764 wsm_key->tkip_group.keyid = key->keyidx; 765 } 766 break; 767 case WLAN_CIPHER_SUITE_CCMP: 768 ieee80211_get_key_rx_seq(key, 0, &seq); 769 if (pairwise) { 770 wsm_key->type = WSM_KEY_TYPE_AES_PAIRWISE; 771 memcpy(wsm_key->aes_pairwise.peer, 772 peer_addr, ETH_ALEN); 773 memcpy(wsm_key->aes_pairwise.keydata, 774 &key->key[0], 16); 775 } else { 776 wsm_key->type = WSM_KEY_TYPE_AES_GROUP; 777 memcpy(wsm_key->aes_group.keydata, 778 &key->key[0], 16); 779 780 wsm_key->aes_group.rx_seqnum[0] = seq.ccmp.pn[5]; 781 wsm_key->aes_group.rx_seqnum[1] = seq.ccmp.pn[4]; 782 wsm_key->aes_group.rx_seqnum[2] = seq.ccmp.pn[3]; 783 wsm_key->aes_group.rx_seqnum[3] = seq.ccmp.pn[2]; 784 wsm_key->aes_group.rx_seqnum[4] = seq.ccmp.pn[1]; 785 wsm_key->aes_group.rx_seqnum[5] = seq.ccmp.pn[0]; 786 wsm_key->aes_group.rx_seqnum[6] = 0; 787 wsm_key->aes_group.rx_seqnum[7] = 0; 788 wsm_key->aes_group.keyid = key->keyidx; 789 } 790 break; 791 case WLAN_CIPHER_SUITE_SMS4: 792 if (pairwise) { 793 wsm_key->type = WSM_KEY_TYPE_WAPI_PAIRWISE; 794 memcpy(wsm_key->wapi_pairwise.peer, 795 peer_addr, ETH_ALEN); 796 memcpy(wsm_key->wapi_pairwise.keydata, 797 &key->key[0], 16); 798 memcpy(wsm_key->wapi_pairwise.mic_key, 799 &key->key[16], 16); 800 wsm_key->wapi_pairwise.keyid = key->keyidx; 801 } else { 802 wsm_key->type = WSM_KEY_TYPE_WAPI_GROUP; 803 memcpy(wsm_key->wapi_group.keydata, 804 &key->key[0], 16); 805 memcpy(wsm_key->wapi_group.mic_key, 806 &key->key[16], 16); 807 wsm_key->wapi_group.keyid = key->keyidx; 808 } 809 break; 810 default: 811 pr_warn("Unhandled key type %d\n", key->cipher); 812 cw1200_free_key(priv, idx); 813 ret = -EOPNOTSUPP; 814 goto finally; 815 } 816 ret = wsm_add_key(priv, wsm_key); 817 if (!ret) 818 key->hw_key_idx = idx; 819 else 820 cw1200_free_key(priv, idx); 821 } else if (cmd == DISABLE_KEY) { 822 struct wsm_remove_key wsm_key = { 823 .index = key->hw_key_idx, 824 }; 825 826 if (wsm_key.index > WSM_KEY_MAX_INDEX) { 827 ret = -EINVAL; 828 goto finally; 829 } 830 831 cw1200_free_key(priv, wsm_key.index); 832 ret = wsm_remove_key(priv, &wsm_key); 833 } else { 834 pr_warn("Unhandled key command %d\n", cmd); 835 } 836 837 finally: 838 mutex_unlock(&priv->conf_mutex); 839 return ret; 840 } 841 842 void cw1200_wep_key_work(struct work_struct *work) 843 { 844 struct cw1200_common *priv = 845 container_of(work, struct cw1200_common, wep_key_work); 846 u8 queue_id = cw1200_queue_get_queue_id(priv->pending_frame_id); 847 struct cw1200_queue *queue = &priv->tx_queue[queue_id]; 848 __le32 wep_default_key_id = __cpu_to_le32( 849 priv->wep_default_key_id); 850 851 pr_debug("[STA] Setting default WEP key: %d\n", 852 priv->wep_default_key_id); 853 wsm_flush_tx(priv); 854 wsm_write_mib(priv, WSM_MIB_ID_DOT11_WEP_DEFAULT_KEY_ID, 855 &wep_default_key_id, sizeof(wep_default_key_id)); 856 cw1200_queue_requeue(queue, priv->pending_frame_id); 857 wsm_unlock_tx(priv); 858 } 859 860 int cw1200_set_rts_threshold(struct ieee80211_hw *hw, u32 value) 861 { 862 int ret = 0; 863 __le32 val32; 864 struct cw1200_common *priv = hw->priv; 865 866 if (priv->mode == NL80211_IFTYPE_UNSPECIFIED) 867 return 0; 868 869 if (value != (u32) -1) 870 val32 = __cpu_to_le32(value); 871 else 872 val32 = 0; /* disabled */ 873 874 if (priv->rts_threshold == value) 875 goto out; 876 877 pr_debug("[STA] Setting RTS threshold: %d\n", 878 priv->rts_threshold); 879 880 /* mutex_lock(&priv->conf_mutex); */ 881 ret = wsm_write_mib(priv, WSM_MIB_ID_DOT11_RTS_THRESHOLD, 882 &val32, sizeof(val32)); 883 if (!ret) 884 priv->rts_threshold = value; 885 /* mutex_unlock(&priv->conf_mutex); */ 886 887 out: 888 return ret; 889 } 890 891 /* If successful, LOCKS the TX queue! */ 892 static int __cw1200_flush(struct cw1200_common *priv, bool drop) 893 { 894 int i, ret; 895 896 for (;;) { 897 /* TODO: correct flush handling is required when dev_stop. 898 * Temporary workaround: 2s 899 */ 900 if (drop) { 901 for (i = 0; i < 4; ++i) 902 cw1200_queue_clear(&priv->tx_queue[i]); 903 } else { 904 ret = wait_event_timeout( 905 priv->tx_queue_stats.wait_link_id_empty, 906 cw1200_queue_stats_is_empty( 907 &priv->tx_queue_stats, -1), 908 2 * HZ); 909 } 910 911 if (!drop && ret <= 0) { 912 ret = -ETIMEDOUT; 913 break; 914 } else { 915 ret = 0; 916 } 917 918 wsm_lock_tx(priv); 919 if (!cw1200_queue_stats_is_empty(&priv->tx_queue_stats, -1)) { 920 /* Highly unlikely: WSM requeued frames. */ 921 wsm_unlock_tx(priv); 922 continue; 923 } 924 break; 925 } 926 return ret; 927 } 928 929 void cw1200_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 930 u32 queues, bool drop) 931 { 932 struct cw1200_common *priv = hw->priv; 933 934 switch (priv->mode) { 935 case NL80211_IFTYPE_MONITOR: 936 drop = true; 937 break; 938 case NL80211_IFTYPE_AP: 939 if (!priv->enable_beacon) 940 drop = true; 941 break; 942 } 943 944 if (!__cw1200_flush(priv, drop)) 945 wsm_unlock_tx(priv); 946 947 return; 948 } 949 950 /* ******************************************************************** */ 951 /* WSM callbacks */ 952 953 void cw1200_free_event_queue(struct cw1200_common *priv) 954 { 955 LIST_HEAD(list); 956 957 spin_lock(&priv->event_queue_lock); 958 list_splice_init(&priv->event_queue, &list); 959 spin_unlock(&priv->event_queue_lock); 960 961 __cw1200_free_event_queue(&list); 962 } 963 964 void cw1200_event_handler(struct work_struct *work) 965 { 966 struct cw1200_common *priv = 967 container_of(work, struct cw1200_common, event_handler); 968 struct cw1200_wsm_event *event; 969 LIST_HEAD(list); 970 971 spin_lock(&priv->event_queue_lock); 972 list_splice_init(&priv->event_queue, &list); 973 spin_unlock(&priv->event_queue_lock); 974 975 list_for_each_entry(event, &list, link) { 976 switch (event->evt.id) { 977 case WSM_EVENT_ERROR: 978 pr_err("Unhandled WSM Error from LMAC\n"); 979 break; 980 case WSM_EVENT_BSS_LOST: 981 pr_debug("[CQM] BSS lost.\n"); 982 cancel_work_sync(&priv->unjoin_work); 983 if (!down_trylock(&priv->scan.lock)) { 984 cw1200_cqm_bssloss_sm(priv, 1, 0, 0); 985 up(&priv->scan.lock); 986 } else { 987 /* Scan is in progress. Delay reporting. 988 * Scan complete will trigger bss_loss_work 989 */ 990 priv->delayed_link_loss = 1; 991 /* Also start a watchdog. */ 992 queue_delayed_work(priv->workqueue, 993 &priv->bss_loss_work, 5*HZ); 994 } 995 break; 996 case WSM_EVENT_BSS_REGAINED: 997 pr_debug("[CQM] BSS regained.\n"); 998 cw1200_cqm_bssloss_sm(priv, 0, 0, 0); 999 cancel_work_sync(&priv->unjoin_work); 1000 break; 1001 case WSM_EVENT_RADAR_DETECTED: 1002 wiphy_info(priv->hw->wiphy, "radar pulse detected\n"); 1003 break; 1004 case WSM_EVENT_RCPI_RSSI: 1005 { 1006 /* RSSI: signed Q8.0, RCPI: unsigned Q7.1 1007 * RSSI = RCPI / 2 - 110 1008 */ 1009 int rcpi_rssi = (int)(event->evt.data & 0xFF); 1010 int cqm_evt; 1011 if (priv->cqm_use_rssi) 1012 rcpi_rssi = (s8)rcpi_rssi; 1013 else 1014 rcpi_rssi = rcpi_rssi / 2 - 110; 1015 1016 cqm_evt = (rcpi_rssi <= priv->cqm_rssi_thold) ? 1017 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW : 1018 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH; 1019 pr_debug("[CQM] RSSI event: %d.\n", rcpi_rssi); 1020 ieee80211_cqm_rssi_notify(priv->vif, cqm_evt, rcpi_rssi, 1021 GFP_KERNEL); 1022 break; 1023 } 1024 case WSM_EVENT_BT_INACTIVE: 1025 pr_warn("Unhandled BT INACTIVE from LMAC\n"); 1026 break; 1027 case WSM_EVENT_BT_ACTIVE: 1028 pr_warn("Unhandled BT ACTIVE from LMAC\n"); 1029 break; 1030 } 1031 } 1032 __cw1200_free_event_queue(&list); 1033 } 1034 1035 void cw1200_bss_loss_work(struct work_struct *work) 1036 { 1037 struct cw1200_common *priv = 1038 container_of(work, struct cw1200_common, bss_loss_work.work); 1039 1040 pr_debug("[CQM] Reporting connection loss.\n"); 1041 wsm_lock_tx(priv); 1042 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0) 1043 wsm_unlock_tx(priv); 1044 } 1045 1046 void cw1200_bss_params_work(struct work_struct *work) 1047 { 1048 struct cw1200_common *priv = 1049 container_of(work, struct cw1200_common, bss_params_work); 1050 mutex_lock(&priv->conf_mutex); 1051 1052 priv->bss_params.reset_beacon_loss = 1; 1053 wsm_set_bss_params(priv, &priv->bss_params); 1054 priv->bss_params.reset_beacon_loss = 0; 1055 1056 mutex_unlock(&priv->conf_mutex); 1057 } 1058 1059 /* ******************************************************************** */ 1060 /* Internal API */ 1061 1062 /* This function is called to Parse the SDD file 1063 * to extract listen_interval and PTA related information 1064 * sdd is a TLV: u8 id, u8 len, u8 data[] 1065 */ 1066 static int cw1200_parse_sdd_file(struct cw1200_common *priv) 1067 { 1068 const u8 *p = priv->sdd->data; 1069 int ret = 0; 1070 1071 while (p + 2 <= priv->sdd->data + priv->sdd->size) { 1072 if (p + p[1] + 2 > priv->sdd->data + priv->sdd->size) { 1073 pr_warn("Malformed sdd structure\n"); 1074 return -1; 1075 } 1076 switch (p[0]) { 1077 case SDD_PTA_CFG_ELT_ID: { 1078 u16 v; 1079 if (p[1] < 4) { 1080 pr_warn("SDD_PTA_CFG_ELT_ID malformed\n"); 1081 ret = -1; 1082 break; 1083 } 1084 v = le16_to_cpu(*((__le16 *)(p + 2))); 1085 if (!v) /* non-zero means this is enabled */ 1086 break; 1087 1088 v = le16_to_cpu(*((__le16 *)(p + 4))); 1089 priv->conf_listen_interval = (v >> 7) & 0x1F; 1090 pr_debug("PTA found; Listen Interval %d\n", 1091 priv->conf_listen_interval); 1092 break; 1093 } 1094 case SDD_REFERENCE_FREQUENCY_ELT_ID: { 1095 u16 clk = le16_to_cpu(*((__le16 *)(p + 2))); 1096 if (clk != priv->hw_refclk) 1097 pr_warn("SDD file doesn't match configured refclk (%d vs %d)\n", 1098 clk, priv->hw_refclk); 1099 break; 1100 } 1101 default: 1102 break; 1103 } 1104 p += p[1] + 2; 1105 } 1106 1107 if (!priv->bt_present) { 1108 pr_debug("PTA element NOT found.\n"); 1109 priv->conf_listen_interval = 0; 1110 } 1111 return ret; 1112 } 1113 1114 int cw1200_setup_mac(struct cw1200_common *priv) 1115 { 1116 int ret = 0; 1117 1118 /* NOTE: There is a bug in FW: it reports signal 1119 * as RSSI if RSSI subscription is enabled. 1120 * It's not enough to set WSM_RCPI_RSSI_USE_RSSI. 1121 * 1122 * NOTE2: RSSI based reports have been switched to RCPI, since 1123 * FW has a bug and RSSI reported values are not stable, 1124 * what can lead to signal level oscilations in user-end applications 1125 */ 1126 struct wsm_rcpi_rssi_threshold threshold = { 1127 .rssiRcpiMode = WSM_RCPI_RSSI_THRESHOLD_ENABLE | 1128 WSM_RCPI_RSSI_DONT_USE_UPPER | 1129 WSM_RCPI_RSSI_DONT_USE_LOWER, 1130 .rollingAverageCount = 16, 1131 }; 1132 1133 struct wsm_configuration cfg = { 1134 .dot11StationId = &priv->mac_addr[0], 1135 }; 1136 1137 /* Remember the decission here to make sure, we will handle 1138 * the RCPI/RSSI value correctly on WSM_EVENT_RCPI_RSS 1139 */ 1140 if (threshold.rssiRcpiMode & WSM_RCPI_RSSI_USE_RSSI) 1141 priv->cqm_use_rssi = true; 1142 1143 if (!priv->sdd) { 1144 ret = request_firmware(&priv->sdd, priv->sdd_path, priv->pdev); 1145 if (ret) { 1146 pr_err("Can't load sdd file %s.\n", priv->sdd_path); 1147 return ret; 1148 } 1149 cw1200_parse_sdd_file(priv); 1150 } 1151 1152 cfg.dpdData = priv->sdd->data; 1153 cfg.dpdData_size = priv->sdd->size; 1154 ret = wsm_configuration(priv, &cfg); 1155 if (ret) 1156 return ret; 1157 1158 /* Configure RSSI/SCPI reporting as RSSI. */ 1159 wsm_set_rcpi_rssi_threshold(priv, &threshold); 1160 1161 return 0; 1162 } 1163 1164 static void cw1200_join_complete(struct cw1200_common *priv) 1165 { 1166 pr_debug("[STA] Join complete (%d)\n", priv->join_complete_status); 1167 1168 priv->join_pending = false; 1169 if (priv->join_complete_status) { 1170 priv->join_status = CW1200_JOIN_STATUS_PASSIVE; 1171 cw1200_update_listening(priv, priv->listening); 1172 cw1200_do_unjoin(priv); 1173 ieee80211_connection_loss(priv->vif); 1174 } else { 1175 if (priv->mode == NL80211_IFTYPE_ADHOC) 1176 priv->join_status = CW1200_JOIN_STATUS_IBSS; 1177 else 1178 priv->join_status = CW1200_JOIN_STATUS_PRE_STA; 1179 } 1180 wsm_unlock_tx(priv); /* Clearing the lock held before do_join() */ 1181 } 1182 1183 void cw1200_join_complete_work(struct work_struct *work) 1184 { 1185 struct cw1200_common *priv = 1186 container_of(work, struct cw1200_common, join_complete_work); 1187 mutex_lock(&priv->conf_mutex); 1188 cw1200_join_complete(priv); 1189 mutex_unlock(&priv->conf_mutex); 1190 } 1191 1192 void cw1200_join_complete_cb(struct cw1200_common *priv, 1193 struct wsm_join_complete *arg) 1194 { 1195 pr_debug("[STA] cw1200_join_complete_cb called, status=%d.\n", 1196 arg->status); 1197 1198 if (cancel_delayed_work(&priv->join_timeout)) { 1199 priv->join_complete_status = arg->status; 1200 queue_work(priv->workqueue, &priv->join_complete_work); 1201 } 1202 } 1203 1204 /* MUST be called with tx_lock held! It will be unlocked for us. */ 1205 static void cw1200_do_join(struct cw1200_common *priv) 1206 { 1207 const u8 *bssid; 1208 struct ieee80211_bss_conf *conf = &priv->vif->bss_conf; 1209 struct cfg80211_bss *bss = NULL; 1210 struct wsm_protected_mgmt_policy mgmt_policy; 1211 struct wsm_join join = { 1212 .mode = priv->vif->cfg.ibss_joined ? 1213 WSM_JOIN_MODE_IBSS : WSM_JOIN_MODE_BSS, 1214 .preamble_type = WSM_JOIN_PREAMBLE_LONG, 1215 .probe_for_join = 1, 1216 .atim_window = 0, 1217 .basic_rate_set = cw1200_rate_mask_to_wsm(priv, 1218 conf->basic_rates), 1219 }; 1220 if (delayed_work_pending(&priv->join_timeout)) { 1221 pr_warn("[STA] - Join request already pending, skipping..\n"); 1222 wsm_unlock_tx(priv); 1223 return; 1224 } 1225 1226 if (priv->join_status) 1227 cw1200_do_unjoin(priv); 1228 1229 bssid = priv->vif->bss_conf.bssid; 1230 1231 bss = cfg80211_get_bss(priv->hw->wiphy, priv->channel, bssid, NULL, 0, 1232 IEEE80211_BSS_TYPE_ANY, IEEE80211_PRIVACY_ANY); 1233 1234 if (!bss && !priv->vif->cfg.ibss_joined) { 1235 wsm_unlock_tx(priv); 1236 return; 1237 } 1238 1239 mutex_lock(&priv->conf_mutex); 1240 1241 /* Under the conf lock: check scan status and 1242 * bail out if it is in progress. 1243 */ 1244 if (atomic_read(&priv->scan.in_progress)) { 1245 wsm_unlock_tx(priv); 1246 goto done_put; 1247 } 1248 1249 priv->join_pending = true; 1250 1251 /* Sanity check basic rates */ 1252 if (!join.basic_rate_set) 1253 join.basic_rate_set = 7; 1254 1255 /* Sanity check beacon interval */ 1256 if (!priv->beacon_int) 1257 priv->beacon_int = 1; 1258 1259 join.beacon_interval = priv->beacon_int; 1260 1261 /* BT Coex related changes */ 1262 if (priv->bt_present) { 1263 if (((priv->conf_listen_interval * 100) % 1264 priv->beacon_int) == 0) 1265 priv->listen_interval = 1266 ((priv->conf_listen_interval * 100) / 1267 priv->beacon_int); 1268 else 1269 priv->listen_interval = 1270 ((priv->conf_listen_interval * 100) / 1271 priv->beacon_int + 1); 1272 } 1273 1274 if (priv->hw->conf.ps_dtim_period) 1275 priv->join_dtim_period = priv->hw->conf.ps_dtim_period; 1276 join.dtim_period = priv->join_dtim_period; 1277 1278 join.channel_number = priv->channel->hw_value; 1279 join.band = (priv->channel->band == NL80211_BAND_5GHZ) ? 1280 WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G; 1281 1282 memcpy(join.bssid, bssid, sizeof(join.bssid)); 1283 1284 pr_debug("[STA] Join BSSID: %pM DTIM: %d, interval: %d\n", 1285 join.bssid, 1286 join.dtim_period, priv->beacon_int); 1287 1288 if (!priv->vif->cfg.ibss_joined) { 1289 const u8 *ssidie; 1290 rcu_read_lock(); 1291 ssidie = ieee80211_bss_get_ie(bss, WLAN_EID_SSID); 1292 if (ssidie) { 1293 join.ssid_len = ssidie[1]; 1294 memcpy(join.ssid, &ssidie[2], join.ssid_len); 1295 } 1296 rcu_read_unlock(); 1297 } 1298 1299 if (priv->vif->p2p) { 1300 join.flags |= WSM_JOIN_FLAGS_P2P_GO; 1301 join.basic_rate_set = 1302 cw1200_rate_mask_to_wsm(priv, 0xFF0); 1303 } 1304 1305 /* Enable asynchronous join calls */ 1306 if (!priv->vif->cfg.ibss_joined) { 1307 join.flags |= WSM_JOIN_FLAGS_FORCE; 1308 join.flags |= WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND; 1309 } 1310 1311 wsm_flush_tx(priv); 1312 1313 /* Stay Awake for Join and Auth Timeouts and a bit more */ 1314 cw1200_pm_stay_awake(&priv->pm_state, 1315 CW1200_JOIN_TIMEOUT + CW1200_AUTH_TIMEOUT); 1316 1317 cw1200_update_listening(priv, false); 1318 1319 /* Turn on Block ACKs */ 1320 wsm_set_block_ack_policy(priv, priv->ba_tx_tid_mask, 1321 priv->ba_rx_tid_mask); 1322 1323 /* Set up timeout */ 1324 if (join.flags & WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND) { 1325 priv->join_status = CW1200_JOIN_STATUS_JOINING; 1326 queue_delayed_work(priv->workqueue, 1327 &priv->join_timeout, 1328 CW1200_JOIN_TIMEOUT); 1329 } 1330 1331 /* 802.11w protected mgmt frames */ 1332 mgmt_policy.protectedMgmtEnable = 0; 1333 mgmt_policy.unprotectedMgmtFramesAllowed = 1; 1334 mgmt_policy.encryptionForAuthFrame = 1; 1335 wsm_set_protected_mgmt_policy(priv, &mgmt_policy); 1336 1337 /* Perform actual join */ 1338 if (wsm_join(priv, &join)) { 1339 pr_err("[STA] cw1200_join_work: wsm_join failed!\n"); 1340 cancel_delayed_work_sync(&priv->join_timeout); 1341 cw1200_update_listening(priv, priv->listening); 1342 /* Tx lock still held, unjoin will clear it. */ 1343 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0) 1344 wsm_unlock_tx(priv); 1345 } else { 1346 if (!(join.flags & WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND)) 1347 cw1200_join_complete(priv); /* Will clear tx_lock */ 1348 1349 /* Upload keys */ 1350 cw1200_upload_keys(priv); 1351 1352 /* Due to beacon filtering it is possible that the 1353 * AP's beacon is not known for the mac80211 stack. 1354 * Disable filtering temporary to make sure the stack 1355 * receives at least one 1356 */ 1357 priv->disable_beacon_filter = true; 1358 } 1359 cw1200_update_filtering(priv); 1360 1361 done_put: 1362 mutex_unlock(&priv->conf_mutex); 1363 if (bss) 1364 cfg80211_put_bss(priv->hw->wiphy, bss); 1365 } 1366 1367 void cw1200_join_timeout(struct work_struct *work) 1368 { 1369 struct cw1200_common *priv = 1370 container_of(work, struct cw1200_common, join_timeout.work); 1371 pr_debug("[WSM] Join timed out.\n"); 1372 wsm_lock_tx(priv); 1373 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0) 1374 wsm_unlock_tx(priv); 1375 } 1376 1377 static void cw1200_do_unjoin(struct cw1200_common *priv) 1378 { 1379 struct wsm_reset reset = { 1380 .reset_statistics = true, 1381 }; 1382 1383 cancel_delayed_work_sync(&priv->join_timeout); 1384 1385 mutex_lock(&priv->conf_mutex); 1386 priv->join_pending = false; 1387 1388 if (atomic_read(&priv->scan.in_progress)) { 1389 if (priv->delayed_unjoin) 1390 wiphy_dbg(priv->hw->wiphy, "Delayed unjoin is already scheduled.\n"); 1391 else 1392 priv->delayed_unjoin = true; 1393 goto done; 1394 } 1395 1396 priv->delayed_link_loss = false; 1397 1398 if (!priv->join_status) 1399 goto done; 1400 1401 if (priv->join_status == CW1200_JOIN_STATUS_AP) 1402 goto done; 1403 1404 cancel_work_sync(&priv->update_filtering_work); 1405 cancel_work_sync(&priv->set_beacon_wakeup_period_work); 1406 priv->join_status = CW1200_JOIN_STATUS_PASSIVE; 1407 1408 /* Unjoin is a reset. */ 1409 wsm_flush_tx(priv); 1410 wsm_keep_alive_period(priv, 0); 1411 wsm_reset(priv, &reset); 1412 wsm_set_output_power(priv, priv->output_power * 10); 1413 priv->join_dtim_period = 0; 1414 cw1200_setup_mac(priv); 1415 cw1200_free_event_queue(priv); 1416 cancel_work_sync(&priv->event_handler); 1417 cw1200_update_listening(priv, priv->listening); 1418 cw1200_cqm_bssloss_sm(priv, 0, 0, 0); 1419 1420 /* Disable Block ACKs */ 1421 wsm_set_block_ack_policy(priv, 0, 0); 1422 1423 priv->disable_beacon_filter = false; 1424 cw1200_update_filtering(priv); 1425 memset(&priv->association_mode, 0, 1426 sizeof(priv->association_mode)); 1427 memset(&priv->bss_params, 0, sizeof(priv->bss_params)); 1428 priv->setbssparams_done = false; 1429 memset(&priv->firmware_ps_mode, 0, 1430 sizeof(priv->firmware_ps_mode)); 1431 1432 pr_debug("[STA] Unjoin completed.\n"); 1433 1434 done: 1435 mutex_unlock(&priv->conf_mutex); 1436 } 1437 1438 void cw1200_unjoin_work(struct work_struct *work) 1439 { 1440 struct cw1200_common *priv = 1441 container_of(work, struct cw1200_common, unjoin_work); 1442 1443 cw1200_do_unjoin(priv); 1444 1445 /* Tell the stack we're dead */ 1446 ieee80211_connection_loss(priv->vif); 1447 1448 wsm_unlock_tx(priv); 1449 } 1450 1451 int cw1200_enable_listening(struct cw1200_common *priv) 1452 { 1453 struct wsm_start start = { 1454 .mode = WSM_START_MODE_P2P_DEV, 1455 .band = WSM_PHY_BAND_2_4G, 1456 .beacon_interval = 100, 1457 .dtim_period = 1, 1458 .probe_delay = 0, 1459 .basic_rate_set = 0x0F, 1460 }; 1461 1462 if (priv->channel) { 1463 start.band = priv->channel->band == NL80211_BAND_5GHZ ? 1464 WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G; 1465 start.channel_number = priv->channel->hw_value; 1466 } else { 1467 start.band = WSM_PHY_BAND_2_4G; 1468 start.channel_number = 1; 1469 } 1470 1471 return wsm_start(priv, &start); 1472 } 1473 1474 int cw1200_disable_listening(struct cw1200_common *priv) 1475 { 1476 int ret; 1477 struct wsm_reset reset = { 1478 .reset_statistics = true, 1479 }; 1480 ret = wsm_reset(priv, &reset); 1481 return ret; 1482 } 1483 1484 void cw1200_update_listening(struct cw1200_common *priv, bool enabled) 1485 { 1486 if (enabled) { 1487 if (priv->join_status == CW1200_JOIN_STATUS_PASSIVE) { 1488 if (!cw1200_enable_listening(priv)) 1489 priv->join_status = CW1200_JOIN_STATUS_MONITOR; 1490 wsm_set_probe_responder(priv, true); 1491 } 1492 } else { 1493 if (priv->join_status == CW1200_JOIN_STATUS_MONITOR) { 1494 if (!cw1200_disable_listening(priv)) 1495 priv->join_status = CW1200_JOIN_STATUS_PASSIVE; 1496 wsm_set_probe_responder(priv, false); 1497 } 1498 } 1499 } 1500 1501 int cw1200_set_uapsd_param(struct cw1200_common *priv, 1502 const struct wsm_edca_params *arg) 1503 { 1504 int ret; 1505 u16 uapsd_flags = 0; 1506 1507 /* Here's the mapping AC [queue, bit] 1508 * VO [0,3], VI [1, 2], BE [2, 1], BK [3, 0] 1509 */ 1510 1511 if (arg->uapsd_enable[0]) 1512 uapsd_flags |= 1 << 3; 1513 1514 if (arg->uapsd_enable[1]) 1515 uapsd_flags |= 1 << 2; 1516 1517 if (arg->uapsd_enable[2]) 1518 uapsd_flags |= 1 << 1; 1519 1520 if (arg->uapsd_enable[3]) 1521 uapsd_flags |= 1; 1522 1523 /* Currently pseudo U-APSD operation is not supported, so setting 1524 * MinAutoTriggerInterval, MaxAutoTriggerInterval and 1525 * AutoTriggerStep to 0 1526 */ 1527 1528 priv->uapsd_info.uapsd_flags = cpu_to_le16(uapsd_flags); 1529 priv->uapsd_info.min_auto_trigger_interval = 0; 1530 priv->uapsd_info.max_auto_trigger_interval = 0; 1531 priv->uapsd_info.auto_trigger_step = 0; 1532 1533 ret = wsm_set_uapsd_info(priv, &priv->uapsd_info); 1534 return ret; 1535 } 1536 1537 /* ******************************************************************** */ 1538 /* AP API */ 1539 1540 int cw1200_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1541 struct ieee80211_sta *sta) 1542 { 1543 struct cw1200_common *priv = hw->priv; 1544 struct cw1200_sta_priv *sta_priv = 1545 (struct cw1200_sta_priv *)&sta->drv_priv; 1546 struct cw1200_link_entry *entry; 1547 struct sk_buff *skb; 1548 1549 if (priv->mode != NL80211_IFTYPE_AP) 1550 return 0; 1551 1552 sta_priv->link_id = cw1200_find_link_id(priv, sta->addr); 1553 if (WARN_ON(!sta_priv->link_id)) { 1554 wiphy_info(priv->hw->wiphy, 1555 "[AP] No more link IDs available.\n"); 1556 return -ENOENT; 1557 } 1558 1559 entry = &priv->link_id_db[sta_priv->link_id - 1]; 1560 spin_lock_bh(&priv->ps_state_lock); 1561 if ((sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK) == 1562 IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK) 1563 priv->sta_asleep_mask |= BIT(sta_priv->link_id); 1564 entry->status = CW1200_LINK_HARD; 1565 while ((skb = skb_dequeue(&entry->rx_queue))) 1566 ieee80211_rx_irqsafe(priv->hw, skb); 1567 spin_unlock_bh(&priv->ps_state_lock); 1568 return 0; 1569 } 1570 1571 int cw1200_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1572 struct ieee80211_sta *sta) 1573 { 1574 struct cw1200_common *priv = hw->priv; 1575 struct cw1200_sta_priv *sta_priv = 1576 (struct cw1200_sta_priv *)&sta->drv_priv; 1577 struct cw1200_link_entry *entry; 1578 1579 if (priv->mode != NL80211_IFTYPE_AP || !sta_priv->link_id) 1580 return 0; 1581 1582 entry = &priv->link_id_db[sta_priv->link_id - 1]; 1583 spin_lock_bh(&priv->ps_state_lock); 1584 entry->status = CW1200_LINK_RESERVE; 1585 entry->timestamp = jiffies; 1586 wsm_lock_tx_async(priv); 1587 if (queue_work(priv->workqueue, &priv->link_id_work) <= 0) 1588 wsm_unlock_tx(priv); 1589 spin_unlock_bh(&priv->ps_state_lock); 1590 flush_workqueue(priv->workqueue); 1591 return 0; 1592 } 1593 1594 static void __cw1200_sta_notify(struct ieee80211_hw *dev, 1595 struct ieee80211_vif *vif, 1596 enum sta_notify_cmd notify_cmd, 1597 int link_id) 1598 { 1599 struct cw1200_common *priv = dev->priv; 1600 u32 bit, prev; 1601 1602 /* Zero link id means "for all link IDs" */ 1603 if (link_id) 1604 bit = BIT(link_id); 1605 else if (WARN_ON_ONCE(notify_cmd != STA_NOTIFY_AWAKE)) 1606 bit = 0; 1607 else 1608 bit = priv->link_id_map; 1609 prev = priv->sta_asleep_mask & bit; 1610 1611 switch (notify_cmd) { 1612 case STA_NOTIFY_SLEEP: 1613 if (!prev) { 1614 if (priv->buffered_multicasts && 1615 !priv->sta_asleep_mask) 1616 queue_work(priv->workqueue, 1617 &priv->multicast_start_work); 1618 priv->sta_asleep_mask |= bit; 1619 } 1620 break; 1621 case STA_NOTIFY_AWAKE: 1622 if (prev) { 1623 priv->sta_asleep_mask &= ~bit; 1624 priv->pspoll_mask &= ~bit; 1625 if (priv->tx_multicast && link_id && 1626 !priv->sta_asleep_mask) 1627 queue_work(priv->workqueue, 1628 &priv->multicast_stop_work); 1629 cw1200_bh_wakeup(priv); 1630 } 1631 break; 1632 } 1633 } 1634 1635 void cw1200_sta_notify(struct ieee80211_hw *dev, 1636 struct ieee80211_vif *vif, 1637 enum sta_notify_cmd notify_cmd, 1638 struct ieee80211_sta *sta) 1639 { 1640 struct cw1200_common *priv = dev->priv; 1641 struct cw1200_sta_priv *sta_priv = 1642 (struct cw1200_sta_priv *)&sta->drv_priv; 1643 1644 spin_lock_bh(&priv->ps_state_lock); 1645 __cw1200_sta_notify(dev, vif, notify_cmd, sta_priv->link_id); 1646 spin_unlock_bh(&priv->ps_state_lock); 1647 } 1648 1649 static void cw1200_ps_notify(struct cw1200_common *priv, 1650 int link_id, bool ps) 1651 { 1652 if (link_id > CW1200_MAX_STA_IN_AP_MODE) 1653 return; 1654 1655 pr_debug("%s for LinkId: %d. STAs asleep: %.8X\n", 1656 ps ? "Stop" : "Start", 1657 link_id, priv->sta_asleep_mask); 1658 1659 __cw1200_sta_notify(priv->hw, priv->vif, 1660 ps ? STA_NOTIFY_SLEEP : STA_NOTIFY_AWAKE, link_id); 1661 } 1662 1663 static int cw1200_set_tim_impl(struct cw1200_common *priv, bool aid0_bit_set) 1664 { 1665 struct sk_buff *skb; 1666 struct wsm_update_ie update_ie = { 1667 .what = WSM_UPDATE_IE_BEACON, 1668 .count = 1, 1669 }; 1670 u16 tim_offset, tim_length; 1671 1672 pr_debug("[AP] mcast: %s.\n", aid0_bit_set ? "ena" : "dis"); 1673 1674 skb = ieee80211_beacon_get_tim(priv->hw, priv->vif, 1675 &tim_offset, &tim_length, 0); 1676 if (!skb) { 1677 if (!__cw1200_flush(priv, true)) 1678 wsm_unlock_tx(priv); 1679 return -ENOENT; 1680 } 1681 1682 if (tim_offset && tim_length >= 6) { 1683 /* Ignore DTIM count from mac80211: 1684 * firmware handles DTIM internally. 1685 */ 1686 skb->data[tim_offset + 2] = 0; 1687 1688 /* Set/reset aid0 bit */ 1689 if (aid0_bit_set) 1690 skb->data[tim_offset + 4] |= 1; 1691 else 1692 skb->data[tim_offset + 4] &= ~1; 1693 } 1694 1695 update_ie.ies = &skb->data[tim_offset]; 1696 update_ie.length = tim_length; 1697 wsm_update_ie(priv, &update_ie); 1698 1699 dev_kfree_skb(skb); 1700 1701 return 0; 1702 } 1703 1704 void cw1200_set_tim_work(struct work_struct *work) 1705 { 1706 struct cw1200_common *priv = 1707 container_of(work, struct cw1200_common, set_tim_work); 1708 (void)cw1200_set_tim_impl(priv, priv->aid0_bit_set); 1709 } 1710 1711 int cw1200_set_tim(struct ieee80211_hw *dev, struct ieee80211_sta *sta, 1712 bool set) 1713 { 1714 struct cw1200_common *priv = dev->priv; 1715 queue_work(priv->workqueue, &priv->set_tim_work); 1716 return 0; 1717 } 1718 1719 void cw1200_set_cts_work(struct work_struct *work) 1720 { 1721 struct cw1200_common *priv = 1722 container_of(work, struct cw1200_common, set_cts_work); 1723 1724 u8 erp_ie[3] = {WLAN_EID_ERP_INFO, 0x1, 0}; 1725 struct wsm_update_ie update_ie = { 1726 .what = WSM_UPDATE_IE_BEACON, 1727 .count = 1, 1728 .ies = erp_ie, 1729 .length = 3, 1730 }; 1731 u32 erp_info; 1732 __le32 use_cts_prot; 1733 mutex_lock(&priv->conf_mutex); 1734 erp_info = priv->erp_info; 1735 mutex_unlock(&priv->conf_mutex); 1736 use_cts_prot = 1737 erp_info & WLAN_ERP_USE_PROTECTION ? 1738 __cpu_to_le32(1) : 0; 1739 1740 erp_ie[ERP_INFO_BYTE_OFFSET] = erp_info; 1741 1742 pr_debug("[STA] ERP information 0x%x\n", erp_info); 1743 1744 wsm_write_mib(priv, WSM_MIB_ID_NON_ERP_PROTECTION, 1745 &use_cts_prot, sizeof(use_cts_prot)); 1746 wsm_update_ie(priv, &update_ie); 1747 1748 return; 1749 } 1750 1751 static int cw1200_set_btcoexinfo(struct cw1200_common *priv) 1752 { 1753 struct wsm_override_internal_txrate arg; 1754 int ret = 0; 1755 1756 if (priv->mode == NL80211_IFTYPE_STATION) { 1757 /* Plumb PSPOLL and NULL template */ 1758 cw1200_upload_pspoll(priv); 1759 cw1200_upload_null(priv); 1760 cw1200_upload_qosnull(priv); 1761 } else { 1762 return 0; 1763 } 1764 1765 memset(&arg, 0, sizeof(struct wsm_override_internal_txrate)); 1766 1767 if (!priv->vif->p2p) { 1768 /* STATION mode */ 1769 if (priv->bss_params.operational_rate_set & ~0xF) { 1770 pr_debug("[STA] STA has ERP rates\n"); 1771 /* G or BG mode */ 1772 arg.internalTxRate = (__ffs( 1773 priv->bss_params.operational_rate_set & ~0xF)); 1774 } else { 1775 pr_debug("[STA] STA has non ERP rates\n"); 1776 /* B only mode */ 1777 arg.internalTxRate = (__ffs(le32_to_cpu(priv->association_mode.basic_rate_set))); 1778 } 1779 arg.nonErpInternalTxRate = (__ffs(le32_to_cpu(priv->association_mode.basic_rate_set))); 1780 } else { 1781 /* P2P mode */ 1782 arg.internalTxRate = (__ffs(priv->bss_params.operational_rate_set & ~0xF)); 1783 arg.nonErpInternalTxRate = (__ffs(priv->bss_params.operational_rate_set & ~0xF)); 1784 } 1785 1786 pr_debug("[STA] BTCOEX_INFO MODE %d, internalTxRate : %x, nonErpInternalTxRate: %x\n", 1787 priv->mode, 1788 arg.internalTxRate, 1789 arg.nonErpInternalTxRate); 1790 1791 ret = wsm_write_mib(priv, WSM_MIB_ID_OVERRIDE_INTERNAL_TX_RATE, 1792 &arg, sizeof(arg)); 1793 1794 return ret; 1795 } 1796 1797 void cw1200_bss_info_changed(struct ieee80211_hw *dev, 1798 struct ieee80211_vif *vif, 1799 struct ieee80211_bss_conf *info, 1800 u64 changed) 1801 { 1802 struct cw1200_common *priv = dev->priv; 1803 bool do_join = false; 1804 1805 mutex_lock(&priv->conf_mutex); 1806 1807 pr_debug("BSS CHANGED: %llx\n", changed); 1808 1809 /* TODO: BSS_CHANGED_QOS */ 1810 /* TODO: BSS_CHANGED_TXPOWER */ 1811 1812 if (changed & BSS_CHANGED_ARP_FILTER) { 1813 struct wsm_mib_arp_ipv4_filter filter = {0}; 1814 int i; 1815 1816 pr_debug("[STA] BSS_CHANGED_ARP_FILTER cnt: %d\n", 1817 vif->cfg.arp_addr_cnt); 1818 1819 /* Currently only one IP address is supported by firmware. 1820 * In case of more IPs arp filtering will be disabled. 1821 */ 1822 if (vif->cfg.arp_addr_cnt > 0 && 1823 vif->cfg.arp_addr_cnt <= WSM_MAX_ARP_IP_ADDRTABLE_ENTRIES) { 1824 for (i = 0; i < vif->cfg.arp_addr_cnt; i++) { 1825 filter.ipv4addrs[i] = vif->cfg.arp_addr_list[i]; 1826 pr_debug("[STA] addr[%d]: 0x%X\n", 1827 i, filter.ipv4addrs[i]); 1828 } 1829 filter.enable = __cpu_to_le32(1); 1830 } 1831 1832 pr_debug("[STA] arp ip filter enable: %d\n", 1833 __le32_to_cpu(filter.enable)); 1834 1835 wsm_set_arp_ipv4_filter(priv, &filter); 1836 } 1837 1838 if (changed & 1839 (BSS_CHANGED_BEACON | 1840 BSS_CHANGED_AP_PROBE_RESP | 1841 BSS_CHANGED_BSSID | 1842 BSS_CHANGED_SSID | 1843 BSS_CHANGED_IBSS)) { 1844 pr_debug("BSS_CHANGED_BEACON\n"); 1845 priv->beacon_int = info->beacon_int; 1846 cw1200_update_beaconing(priv); 1847 cw1200_upload_beacon(priv); 1848 } 1849 1850 if (changed & BSS_CHANGED_BEACON_ENABLED) { 1851 pr_debug("BSS_CHANGED_BEACON_ENABLED (%d)\n", info->enable_beacon); 1852 1853 if (priv->enable_beacon != info->enable_beacon) { 1854 cw1200_enable_beaconing(priv, info->enable_beacon); 1855 priv->enable_beacon = info->enable_beacon; 1856 } 1857 } 1858 1859 if (changed & BSS_CHANGED_BEACON_INT) { 1860 pr_debug("CHANGED_BEACON_INT\n"); 1861 if (vif->cfg.ibss_joined) 1862 do_join = true; 1863 else if (priv->join_status == CW1200_JOIN_STATUS_AP) 1864 cw1200_update_beaconing(priv); 1865 } 1866 1867 /* assoc/disassoc, or maybe AID changed */ 1868 if (changed & BSS_CHANGED_ASSOC) { 1869 wsm_lock_tx(priv); 1870 priv->wep_default_key_id = -1; 1871 wsm_unlock_tx(priv); 1872 } 1873 1874 if (changed & BSS_CHANGED_BSSID) { 1875 pr_debug("BSS_CHANGED_BSSID\n"); 1876 do_join = true; 1877 } 1878 1879 if (changed & 1880 (BSS_CHANGED_ASSOC | 1881 BSS_CHANGED_BSSID | 1882 BSS_CHANGED_IBSS | 1883 BSS_CHANGED_BASIC_RATES | 1884 BSS_CHANGED_HT)) { 1885 pr_debug("BSS_CHANGED_ASSOC\n"); 1886 if (vif->cfg.assoc) { 1887 if (priv->join_status < CW1200_JOIN_STATUS_PRE_STA) { 1888 ieee80211_connection_loss(vif); 1889 mutex_unlock(&priv->conf_mutex); 1890 return; 1891 } else if (priv->join_status == CW1200_JOIN_STATUS_PRE_STA) { 1892 priv->join_status = CW1200_JOIN_STATUS_STA; 1893 } 1894 } else { 1895 do_join = true; 1896 } 1897 1898 if (vif->cfg.assoc || vif->cfg.ibss_joined) { 1899 struct ieee80211_sta *sta = NULL; 1900 __le32 htprot = 0; 1901 1902 if (info->dtim_period) 1903 priv->join_dtim_period = info->dtim_period; 1904 priv->beacon_int = info->beacon_int; 1905 1906 rcu_read_lock(); 1907 1908 if (info->bssid && !vif->cfg.ibss_joined) 1909 sta = ieee80211_find_sta(vif, info->bssid); 1910 if (sta) { 1911 priv->ht_info.ht_cap = sta->deflink.ht_cap; 1912 priv->bss_params.operational_rate_set = 1913 cw1200_rate_mask_to_wsm(priv, 1914 sta->deflink.supp_rates[priv->channel->band]); 1915 priv->ht_info.channel_type = cfg80211_get_chandef_type(&dev->conf.chandef); 1916 priv->ht_info.operation_mode = info->ht_operation_mode; 1917 } else { 1918 memset(&priv->ht_info, 0, 1919 sizeof(priv->ht_info)); 1920 priv->bss_params.operational_rate_set = -1; 1921 } 1922 rcu_read_unlock(); 1923 1924 /* Non Greenfield stations present */ 1925 if (priv->ht_info.operation_mode & 1926 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT) 1927 htprot |= cpu_to_le32(WSM_NON_GREENFIELD_STA_PRESENT); 1928 1929 /* Set HT protection method */ 1930 htprot |= cpu_to_le32((priv->ht_info.operation_mode & IEEE80211_HT_OP_MODE_PROTECTION) << 2); 1931 1932 /* TODO: 1933 * STBC_param.dual_cts 1934 * STBC_param.LSIG_TXOP_FILL 1935 */ 1936 1937 wsm_write_mib(priv, WSM_MIB_ID_SET_HT_PROTECTION, 1938 &htprot, sizeof(htprot)); 1939 1940 priv->association_mode.greenfield = 1941 cw1200_ht_greenfield(&priv->ht_info); 1942 priv->association_mode.flags = 1943 WSM_ASSOCIATION_MODE_SNOOP_ASSOC_FRAMES | 1944 WSM_ASSOCIATION_MODE_USE_PREAMBLE_TYPE | 1945 WSM_ASSOCIATION_MODE_USE_HT_MODE | 1946 WSM_ASSOCIATION_MODE_USE_BASIC_RATE_SET | 1947 WSM_ASSOCIATION_MODE_USE_MPDU_START_SPACING; 1948 priv->association_mode.preamble = 1949 info->use_short_preamble ? 1950 WSM_JOIN_PREAMBLE_SHORT : 1951 WSM_JOIN_PREAMBLE_LONG; 1952 priv->association_mode.basic_rate_set = __cpu_to_le32( 1953 cw1200_rate_mask_to_wsm(priv, 1954 info->basic_rates)); 1955 priv->association_mode.mpdu_start_spacing = 1956 cw1200_ht_ampdu_density(&priv->ht_info); 1957 1958 cw1200_cqm_bssloss_sm(priv, 0, 0, 0); 1959 cancel_work_sync(&priv->unjoin_work); 1960 1961 priv->bss_params.beacon_lost_count = priv->cqm_beacon_loss_count; 1962 priv->bss_params.aid = vif->cfg.aid; 1963 1964 if (priv->join_dtim_period < 1) 1965 priv->join_dtim_period = 1; 1966 1967 pr_debug("[STA] DTIM %d, interval: %d\n", 1968 priv->join_dtim_period, priv->beacon_int); 1969 pr_debug("[STA] Preamble: %d, Greenfield: %d, Aid: %d, Rates: 0x%.8X, Basic: 0x%.8X\n", 1970 priv->association_mode.preamble, 1971 priv->association_mode.greenfield, 1972 priv->bss_params.aid, 1973 priv->bss_params.operational_rate_set, 1974 priv->association_mode.basic_rate_set); 1975 wsm_set_association_mode(priv, &priv->association_mode); 1976 1977 if (!vif->cfg.ibss_joined) { 1978 wsm_keep_alive_period(priv, 30 /* sec */); 1979 wsm_set_bss_params(priv, &priv->bss_params); 1980 priv->setbssparams_done = true; 1981 cw1200_set_beacon_wakeup_period_work(&priv->set_beacon_wakeup_period_work); 1982 cw1200_set_pm(priv, &priv->powersave_mode); 1983 } 1984 if (priv->vif->p2p) { 1985 pr_debug("[STA] Setting p2p powersave configuration.\n"); 1986 wsm_set_p2p_ps_modeinfo(priv, 1987 &priv->p2p_ps_modeinfo); 1988 } 1989 if (priv->bt_present) 1990 cw1200_set_btcoexinfo(priv); 1991 } else { 1992 memset(&priv->association_mode, 0, 1993 sizeof(priv->association_mode)); 1994 memset(&priv->bss_params, 0, sizeof(priv->bss_params)); 1995 } 1996 } 1997 1998 /* ERP Protection */ 1999 if (changed & (BSS_CHANGED_ASSOC | 2000 BSS_CHANGED_ERP_CTS_PROT | 2001 BSS_CHANGED_ERP_PREAMBLE)) { 2002 u32 prev_erp_info = priv->erp_info; 2003 if (info->use_cts_prot) 2004 priv->erp_info |= WLAN_ERP_USE_PROTECTION; 2005 else if (!(prev_erp_info & WLAN_ERP_NON_ERP_PRESENT)) 2006 priv->erp_info &= ~WLAN_ERP_USE_PROTECTION; 2007 2008 if (info->use_short_preamble) 2009 priv->erp_info |= WLAN_ERP_BARKER_PREAMBLE; 2010 else 2011 priv->erp_info &= ~WLAN_ERP_BARKER_PREAMBLE; 2012 2013 pr_debug("[STA] ERP Protection: %x\n", priv->erp_info); 2014 2015 if (prev_erp_info != priv->erp_info) 2016 queue_work(priv->workqueue, &priv->set_cts_work); 2017 } 2018 2019 /* ERP Slottime */ 2020 if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_ERP_SLOT)) { 2021 __le32 slot_time = info->use_short_slot ? 2022 __cpu_to_le32(9) : __cpu_to_le32(20); 2023 pr_debug("[STA] Slot time: %d us.\n", 2024 __le32_to_cpu(slot_time)); 2025 wsm_write_mib(priv, WSM_MIB_ID_DOT11_SLOT_TIME, 2026 &slot_time, sizeof(slot_time)); 2027 } 2028 2029 if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_CQM)) { 2030 struct wsm_rcpi_rssi_threshold threshold = { 2031 .rollingAverageCount = 8, 2032 }; 2033 pr_debug("[CQM] RSSI threshold subscribe: %d +- %d\n", 2034 info->cqm_rssi_thold, info->cqm_rssi_hyst); 2035 priv->cqm_rssi_thold = info->cqm_rssi_thold; 2036 priv->cqm_rssi_hyst = info->cqm_rssi_hyst; 2037 2038 if (info->cqm_rssi_thold || info->cqm_rssi_hyst) { 2039 /* RSSI subscription enabled */ 2040 /* TODO: It's not a correct way of setting threshold. 2041 * Upper and lower must be set equal here and adjusted 2042 * in callback. However current implementation is much 2043 * more relaible and stable. 2044 */ 2045 2046 /* RSSI: signed Q8.0, RCPI: unsigned Q7.1 2047 * RSSI = RCPI / 2 - 110 2048 */ 2049 if (priv->cqm_use_rssi) { 2050 threshold.upperThreshold = 2051 info->cqm_rssi_thold + info->cqm_rssi_hyst; 2052 threshold.lowerThreshold = 2053 info->cqm_rssi_thold; 2054 threshold.rssiRcpiMode |= WSM_RCPI_RSSI_USE_RSSI; 2055 } else { 2056 threshold.upperThreshold = (info->cqm_rssi_thold + info->cqm_rssi_hyst + 110) * 2; 2057 threshold.lowerThreshold = (info->cqm_rssi_thold + 110) * 2; 2058 } 2059 threshold.rssiRcpiMode |= WSM_RCPI_RSSI_THRESHOLD_ENABLE; 2060 } else { 2061 /* There is a bug in FW, see sta.c. We have to enable 2062 * dummy subscription to get correct RSSI values. 2063 */ 2064 threshold.rssiRcpiMode |= 2065 WSM_RCPI_RSSI_THRESHOLD_ENABLE | 2066 WSM_RCPI_RSSI_DONT_USE_UPPER | 2067 WSM_RCPI_RSSI_DONT_USE_LOWER; 2068 if (priv->cqm_use_rssi) 2069 threshold.rssiRcpiMode |= WSM_RCPI_RSSI_USE_RSSI; 2070 } 2071 wsm_set_rcpi_rssi_threshold(priv, &threshold); 2072 } 2073 mutex_unlock(&priv->conf_mutex); 2074 2075 if (do_join) { 2076 wsm_lock_tx(priv); 2077 cw1200_do_join(priv); /* Will unlock it for us */ 2078 } 2079 } 2080 2081 void cw1200_multicast_start_work(struct work_struct *work) 2082 { 2083 struct cw1200_common *priv = 2084 container_of(work, struct cw1200_common, multicast_start_work); 2085 long tmo = priv->join_dtim_period * 2086 (priv->beacon_int + 20) * HZ / 1024; 2087 2088 cancel_work_sync(&priv->multicast_stop_work); 2089 2090 if (!priv->aid0_bit_set) { 2091 wsm_lock_tx(priv); 2092 cw1200_set_tim_impl(priv, true); 2093 priv->aid0_bit_set = true; 2094 mod_timer(&priv->mcast_timeout, jiffies + tmo); 2095 wsm_unlock_tx(priv); 2096 } 2097 } 2098 2099 void cw1200_multicast_stop_work(struct work_struct *work) 2100 { 2101 struct cw1200_common *priv = 2102 container_of(work, struct cw1200_common, multicast_stop_work); 2103 2104 if (priv->aid0_bit_set) { 2105 del_timer_sync(&priv->mcast_timeout); 2106 wsm_lock_tx(priv); 2107 priv->aid0_bit_set = false; 2108 cw1200_set_tim_impl(priv, false); 2109 wsm_unlock_tx(priv); 2110 } 2111 } 2112 2113 void cw1200_mcast_timeout(struct timer_list *t) 2114 { 2115 struct cw1200_common *priv = from_timer(priv, t, mcast_timeout); 2116 2117 wiphy_warn(priv->hw->wiphy, 2118 "Multicast delivery timeout.\n"); 2119 spin_lock_bh(&priv->ps_state_lock); 2120 priv->tx_multicast = priv->aid0_bit_set && 2121 priv->buffered_multicasts; 2122 if (priv->tx_multicast) 2123 cw1200_bh_wakeup(priv); 2124 spin_unlock_bh(&priv->ps_state_lock); 2125 } 2126 2127 int cw1200_ampdu_action(struct ieee80211_hw *hw, 2128 struct ieee80211_vif *vif, 2129 struct ieee80211_ampdu_params *params) 2130 { 2131 /* Aggregation is implemented fully in firmware, 2132 * including block ack negotiation. Do not allow 2133 * mac80211 stack to do anything: it interferes with 2134 * the firmware. 2135 */ 2136 2137 /* Note that we still need this function stubbed. */ 2138 return -ENOTSUPP; 2139 } 2140 2141 /* ******************************************************************** */ 2142 /* WSM callback */ 2143 void cw1200_suspend_resume(struct cw1200_common *priv, 2144 struct wsm_suspend_resume *arg) 2145 { 2146 pr_debug("[AP] %s: %s\n", 2147 arg->stop ? "stop" : "start", 2148 arg->multicast ? "broadcast" : "unicast"); 2149 2150 if (arg->multicast) { 2151 bool cancel_tmo = false; 2152 spin_lock_bh(&priv->ps_state_lock); 2153 if (arg->stop) { 2154 priv->tx_multicast = false; 2155 } else { 2156 /* Firmware sends this indication every DTIM if there 2157 * is a STA in powersave connected. There is no reason 2158 * to suspend, following wakeup will consume much more 2159 * power than it could be saved. 2160 */ 2161 cw1200_pm_stay_awake(&priv->pm_state, 2162 priv->join_dtim_period * 2163 (priv->beacon_int + 20) * HZ / 1024); 2164 priv->tx_multicast = (priv->aid0_bit_set && 2165 priv->buffered_multicasts); 2166 if (priv->tx_multicast) { 2167 cancel_tmo = true; 2168 cw1200_bh_wakeup(priv); 2169 } 2170 } 2171 spin_unlock_bh(&priv->ps_state_lock); 2172 if (cancel_tmo) 2173 del_timer_sync(&priv->mcast_timeout); 2174 } else { 2175 spin_lock_bh(&priv->ps_state_lock); 2176 cw1200_ps_notify(priv, arg->link_id, arg->stop); 2177 spin_unlock_bh(&priv->ps_state_lock); 2178 if (!arg->stop) 2179 cw1200_bh_wakeup(priv); 2180 } 2181 return; 2182 } 2183 2184 /* ******************************************************************** */ 2185 /* AP privates */ 2186 2187 static int cw1200_upload_beacon(struct cw1200_common *priv) 2188 { 2189 int ret = 0; 2190 struct ieee80211_mgmt *mgmt; 2191 struct wsm_template_frame frame = { 2192 .frame_type = WSM_FRAME_TYPE_BEACON, 2193 }; 2194 2195 u16 tim_offset; 2196 u16 tim_len; 2197 2198 if (priv->mode == NL80211_IFTYPE_STATION || 2199 priv->mode == NL80211_IFTYPE_MONITOR || 2200 priv->mode == NL80211_IFTYPE_UNSPECIFIED) 2201 goto done; 2202 2203 if (priv->vif->p2p) 2204 frame.rate = WSM_TRANSMIT_RATE_6; 2205 2206 frame.skb = ieee80211_beacon_get_tim(priv->hw, priv->vif, 2207 &tim_offset, &tim_len, 0); 2208 if (!frame.skb) 2209 return -ENOMEM; 2210 2211 ret = wsm_set_template_frame(priv, &frame); 2212 2213 if (ret) 2214 goto done; 2215 2216 /* TODO: Distill probe resp; remove TIM 2217 * and any other beacon-specific IEs 2218 */ 2219 mgmt = (void *)frame.skb->data; 2220 mgmt->frame_control = 2221 __cpu_to_le16(IEEE80211_FTYPE_MGMT | 2222 IEEE80211_STYPE_PROBE_RESP); 2223 2224 frame.frame_type = WSM_FRAME_TYPE_PROBE_RESPONSE; 2225 if (priv->vif->p2p) { 2226 ret = wsm_set_probe_responder(priv, true); 2227 } else { 2228 ret = wsm_set_template_frame(priv, &frame); 2229 wsm_set_probe_responder(priv, false); 2230 } 2231 2232 done: 2233 dev_kfree_skb(frame.skb); 2234 2235 return ret; 2236 } 2237 2238 static int cw1200_upload_pspoll(struct cw1200_common *priv) 2239 { 2240 int ret = 0; 2241 struct wsm_template_frame frame = { 2242 .frame_type = WSM_FRAME_TYPE_PS_POLL, 2243 .rate = 0xFF, 2244 }; 2245 2246 2247 frame.skb = ieee80211_pspoll_get(priv->hw, priv->vif); 2248 if (!frame.skb) 2249 return -ENOMEM; 2250 2251 ret = wsm_set_template_frame(priv, &frame); 2252 2253 dev_kfree_skb(frame.skb); 2254 2255 return ret; 2256 } 2257 2258 static int cw1200_upload_null(struct cw1200_common *priv) 2259 { 2260 int ret = 0; 2261 struct wsm_template_frame frame = { 2262 .frame_type = WSM_FRAME_TYPE_NULL, 2263 .rate = 0xFF, 2264 }; 2265 2266 frame.skb = ieee80211_nullfunc_get(priv->hw, priv->vif,-1, false); 2267 if (!frame.skb) 2268 return -ENOMEM; 2269 2270 ret = wsm_set_template_frame(priv, &frame); 2271 2272 dev_kfree_skb(frame.skb); 2273 2274 return ret; 2275 } 2276 2277 static int cw1200_upload_qosnull(struct cw1200_common *priv) 2278 { 2279 /* TODO: This needs to be implemented 2280 2281 struct wsm_template_frame frame = { 2282 .frame_type = WSM_FRAME_TYPE_QOS_NULL, 2283 .rate = 0xFF, 2284 }; 2285 2286 frame.skb = ieee80211_qosnullfunc_get(priv->hw, priv->vif); 2287 if (!frame.skb) 2288 return -ENOMEM; 2289 2290 ret = wsm_set_template_frame(priv, &frame); 2291 2292 dev_kfree_skb(frame.skb); 2293 2294 */ 2295 return 0; 2296 } 2297 2298 static int cw1200_enable_beaconing(struct cw1200_common *priv, 2299 bool enable) 2300 { 2301 struct wsm_beacon_transmit transmit = { 2302 .enable_beaconing = enable, 2303 }; 2304 2305 return wsm_beacon_transmit(priv, &transmit); 2306 } 2307 2308 static int cw1200_start_ap(struct cw1200_common *priv) 2309 { 2310 int ret; 2311 struct ieee80211_bss_conf *conf = &priv->vif->bss_conf; 2312 struct wsm_start start = { 2313 .mode = priv->vif->p2p ? 2314 WSM_START_MODE_P2P_GO : WSM_START_MODE_AP, 2315 .band = (priv->channel->band == NL80211_BAND_5GHZ) ? 2316 WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G, 2317 .channel_number = priv->channel->hw_value, 2318 .beacon_interval = conf->beacon_int, 2319 .dtim_period = conf->dtim_period, 2320 .preamble = conf->use_short_preamble ? 2321 WSM_JOIN_PREAMBLE_SHORT : 2322 WSM_JOIN_PREAMBLE_LONG, 2323 .probe_delay = 100, 2324 .basic_rate_set = cw1200_rate_mask_to_wsm(priv, 2325 conf->basic_rates), 2326 }; 2327 struct wsm_operational_mode mode = { 2328 .power_mode = cw1200_power_mode, 2329 .disable_more_flag_usage = true, 2330 }; 2331 2332 memset(start.ssid, 0, sizeof(start.ssid)); 2333 if (!conf->hidden_ssid) { 2334 start.ssid_len = priv->vif->cfg.ssid_len; 2335 memcpy(start.ssid, priv->vif->cfg.ssid, start.ssid_len); 2336 } 2337 2338 priv->beacon_int = conf->beacon_int; 2339 priv->join_dtim_period = conf->dtim_period; 2340 2341 memset(&priv->link_id_db, 0, sizeof(priv->link_id_db)); 2342 2343 pr_debug("[AP] ch: %d(%d), bcn: %d(%d), brt: 0x%.8X, ssid: %.*s.\n", 2344 start.channel_number, start.band, 2345 start.beacon_interval, start.dtim_period, 2346 start.basic_rate_set, 2347 start.ssid_len, start.ssid); 2348 ret = wsm_start(priv, &start); 2349 if (!ret) 2350 ret = cw1200_upload_keys(priv); 2351 if (!ret && priv->vif->p2p) { 2352 pr_debug("[AP] Setting p2p powersave configuration.\n"); 2353 wsm_set_p2p_ps_modeinfo(priv, &priv->p2p_ps_modeinfo); 2354 } 2355 if (!ret) { 2356 wsm_set_block_ack_policy(priv, 0, 0); 2357 priv->join_status = CW1200_JOIN_STATUS_AP; 2358 cw1200_update_filtering(priv); 2359 } 2360 wsm_set_operational_mode(priv, &mode); 2361 return ret; 2362 } 2363 2364 static int cw1200_update_beaconing(struct cw1200_common *priv) 2365 { 2366 struct ieee80211_bss_conf *conf = &priv->vif->bss_conf; 2367 struct wsm_reset reset = { 2368 .link_id = 0, 2369 .reset_statistics = true, 2370 }; 2371 2372 if (priv->mode == NL80211_IFTYPE_AP) { 2373 /* TODO: check if changed channel, band */ 2374 if (priv->join_status != CW1200_JOIN_STATUS_AP || 2375 priv->beacon_int != conf->beacon_int) { 2376 pr_debug("ap restarting\n"); 2377 wsm_lock_tx(priv); 2378 if (priv->join_status != CW1200_JOIN_STATUS_PASSIVE) 2379 wsm_reset(priv, &reset); 2380 priv->join_status = CW1200_JOIN_STATUS_PASSIVE; 2381 cw1200_start_ap(priv); 2382 wsm_unlock_tx(priv); 2383 } else 2384 pr_debug("ap started join_status: %d\n", 2385 priv->join_status); 2386 } 2387 return 0; 2388 } 2389