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 timer_delete_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, int radio_idx, 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, int radio_idx, 861 u32 value) 862 { 863 int ret = 0; 864 __le32 val32; 865 struct cw1200_common *priv = hw->priv; 866 867 if (priv->mode == NL80211_IFTYPE_UNSPECIFIED) 868 return 0; 869 870 if (value != (u32) -1) 871 val32 = __cpu_to_le32(value); 872 else 873 val32 = 0; /* disabled */ 874 875 if (priv->rts_threshold == value) 876 goto out; 877 878 pr_debug("[STA] Setting RTS threshold: %d\n", 879 priv->rts_threshold); 880 881 /* mutex_lock(&priv->conf_mutex); */ 882 ret = wsm_write_mib(priv, WSM_MIB_ID_DOT11_RTS_THRESHOLD, 883 &val32, sizeof(val32)); 884 if (!ret) 885 priv->rts_threshold = value; 886 /* mutex_unlock(&priv->conf_mutex); */ 887 888 out: 889 return ret; 890 } 891 892 /* If successful, LOCKS the TX queue! */ 893 static int __cw1200_flush(struct cw1200_common *priv, bool drop) 894 { 895 int i, ret; 896 897 for (;;) { 898 /* TODO: correct flush handling is required when dev_stop. 899 * Temporary workaround: 2s 900 */ 901 if (drop) { 902 for (i = 0; i < 4; ++i) 903 cw1200_queue_clear(&priv->tx_queue[i]); 904 } else { 905 ret = wait_event_timeout( 906 priv->tx_queue_stats.wait_link_id_empty, 907 cw1200_queue_stats_is_empty( 908 &priv->tx_queue_stats, -1), 909 2 * HZ); 910 } 911 912 if (!drop && ret <= 0) { 913 ret = -ETIMEDOUT; 914 break; 915 } else { 916 ret = 0; 917 } 918 919 wsm_lock_tx(priv); 920 if (!cw1200_queue_stats_is_empty(&priv->tx_queue_stats, -1)) { 921 /* Highly unlikely: WSM requeued frames. */ 922 wsm_unlock_tx(priv); 923 continue; 924 } 925 break; 926 } 927 return ret; 928 } 929 930 void cw1200_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 931 u32 queues, bool drop) 932 { 933 struct cw1200_common *priv = hw->priv; 934 935 switch (priv->mode) { 936 case NL80211_IFTYPE_MONITOR: 937 drop = true; 938 break; 939 case NL80211_IFTYPE_AP: 940 if (!priv->enable_beacon) 941 drop = true; 942 break; 943 } 944 945 if (!__cw1200_flush(priv, drop)) 946 wsm_unlock_tx(priv); 947 948 return; 949 } 950 951 /* ******************************************************************** */ 952 /* WSM callbacks */ 953 954 void cw1200_free_event_queue(struct cw1200_common *priv) 955 { 956 LIST_HEAD(list); 957 958 spin_lock(&priv->event_queue_lock); 959 list_splice_init(&priv->event_queue, &list); 960 spin_unlock(&priv->event_queue_lock); 961 962 __cw1200_free_event_queue(&list); 963 } 964 965 void cw1200_event_handler(struct work_struct *work) 966 { 967 struct cw1200_common *priv = 968 container_of(work, struct cw1200_common, event_handler); 969 struct cw1200_wsm_event *event; 970 LIST_HEAD(list); 971 972 spin_lock(&priv->event_queue_lock); 973 list_splice_init(&priv->event_queue, &list); 974 spin_unlock(&priv->event_queue_lock); 975 976 list_for_each_entry(event, &list, link) { 977 switch (event->evt.id) { 978 case WSM_EVENT_ERROR: 979 pr_err("Unhandled WSM Error from LMAC\n"); 980 break; 981 case WSM_EVENT_BSS_LOST: 982 pr_debug("[CQM] BSS lost.\n"); 983 cancel_work_sync(&priv->unjoin_work); 984 if (!down_trylock(&priv->scan.lock)) { 985 cw1200_cqm_bssloss_sm(priv, 1, 0, 0); 986 up(&priv->scan.lock); 987 } else { 988 /* Scan is in progress. Delay reporting. 989 * Scan complete will trigger bss_loss_work 990 */ 991 priv->delayed_link_loss = 1; 992 /* Also start a watchdog. */ 993 queue_delayed_work(priv->workqueue, 994 &priv->bss_loss_work, 5*HZ); 995 } 996 break; 997 case WSM_EVENT_BSS_REGAINED: 998 pr_debug("[CQM] BSS regained.\n"); 999 cw1200_cqm_bssloss_sm(priv, 0, 0, 0); 1000 cancel_work_sync(&priv->unjoin_work); 1001 break; 1002 case WSM_EVENT_RADAR_DETECTED: 1003 wiphy_info(priv->hw->wiphy, "radar pulse detected\n"); 1004 break; 1005 case WSM_EVENT_RCPI_RSSI: 1006 { 1007 /* RSSI: signed Q8.0, RCPI: unsigned Q7.1 1008 * RSSI = RCPI / 2 - 110 1009 */ 1010 int rcpi_rssi = (int)(event->evt.data & 0xFF); 1011 int cqm_evt; 1012 if (priv->cqm_use_rssi) 1013 rcpi_rssi = (s8)rcpi_rssi; 1014 else 1015 rcpi_rssi = rcpi_rssi / 2 - 110; 1016 1017 cqm_evt = (rcpi_rssi <= priv->cqm_rssi_thold) ? 1018 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW : 1019 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH; 1020 pr_debug("[CQM] RSSI event: %d.\n", rcpi_rssi); 1021 ieee80211_cqm_rssi_notify(priv->vif, cqm_evt, rcpi_rssi, 1022 GFP_KERNEL); 1023 break; 1024 } 1025 case WSM_EVENT_BT_INACTIVE: 1026 pr_warn("Unhandled BT INACTIVE from LMAC\n"); 1027 break; 1028 case WSM_EVENT_BT_ACTIVE: 1029 pr_warn("Unhandled BT ACTIVE from LMAC\n"); 1030 break; 1031 } 1032 } 1033 __cw1200_free_event_queue(&list); 1034 } 1035 1036 void cw1200_bss_loss_work(struct work_struct *work) 1037 { 1038 struct cw1200_common *priv = 1039 container_of(work, struct cw1200_common, bss_loss_work.work); 1040 1041 pr_debug("[CQM] Reporting connection loss.\n"); 1042 wsm_lock_tx(priv); 1043 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0) 1044 wsm_unlock_tx(priv); 1045 } 1046 1047 void cw1200_bss_params_work(struct work_struct *work) 1048 { 1049 struct cw1200_common *priv = 1050 container_of(work, struct cw1200_common, bss_params_work); 1051 mutex_lock(&priv->conf_mutex); 1052 1053 priv->bss_params.reset_beacon_loss = 1; 1054 wsm_set_bss_params(priv, &priv->bss_params); 1055 priv->bss_params.reset_beacon_loss = 0; 1056 1057 mutex_unlock(&priv->conf_mutex); 1058 } 1059 1060 /* ******************************************************************** */ 1061 /* Internal API */ 1062 1063 /* This function is called to Parse the SDD file 1064 * to extract listen_interval and PTA related information 1065 * sdd is a TLV: u8 id, u8 len, u8 data[] 1066 */ 1067 static int cw1200_parse_sdd_file(struct cw1200_common *priv) 1068 { 1069 const u8 *p = priv->sdd->data; 1070 int ret = 0; 1071 1072 while (p + 2 <= priv->sdd->data + priv->sdd->size) { 1073 if (p + p[1] + 2 > priv->sdd->data + priv->sdd->size) { 1074 pr_warn("Malformed sdd structure\n"); 1075 return -1; 1076 } 1077 switch (p[0]) { 1078 case SDD_PTA_CFG_ELT_ID: { 1079 u16 v; 1080 if (p[1] < 4) { 1081 pr_warn("SDD_PTA_CFG_ELT_ID malformed\n"); 1082 ret = -1; 1083 break; 1084 } 1085 v = le16_to_cpu(*((__le16 *)(p + 2))); 1086 if (!v) /* non-zero means this is enabled */ 1087 break; 1088 1089 v = le16_to_cpu(*((__le16 *)(p + 4))); 1090 priv->conf_listen_interval = (v >> 7) & 0x1F; 1091 pr_debug("PTA found; Listen Interval %d\n", 1092 priv->conf_listen_interval); 1093 break; 1094 } 1095 case SDD_REFERENCE_FREQUENCY_ELT_ID: { 1096 u16 clk = le16_to_cpu(*((__le16 *)(p + 2))); 1097 if (clk != priv->hw_refclk) 1098 pr_warn("SDD file doesn't match configured refclk (%d vs %d)\n", 1099 clk, priv->hw_refclk); 1100 break; 1101 } 1102 default: 1103 break; 1104 } 1105 p += p[1] + 2; 1106 } 1107 1108 if (!priv->bt_present) { 1109 pr_debug("PTA element NOT found.\n"); 1110 priv->conf_listen_interval = 0; 1111 } 1112 return ret; 1113 } 1114 1115 int cw1200_setup_mac(struct cw1200_common *priv) 1116 { 1117 int ret = 0; 1118 1119 /* NOTE: There is a bug in FW: it reports signal 1120 * as RSSI if RSSI subscription is enabled. 1121 * It's not enough to set WSM_RCPI_RSSI_USE_RSSI. 1122 * 1123 * NOTE2: RSSI based reports have been switched to RCPI, since 1124 * FW has a bug and RSSI reported values are not stable, 1125 * what can lead to signal level oscilations in user-end applications 1126 */ 1127 struct wsm_rcpi_rssi_threshold threshold = { 1128 .rssiRcpiMode = WSM_RCPI_RSSI_THRESHOLD_ENABLE | 1129 WSM_RCPI_RSSI_DONT_USE_UPPER | 1130 WSM_RCPI_RSSI_DONT_USE_LOWER, 1131 .rollingAverageCount = 16, 1132 }; 1133 1134 struct wsm_configuration cfg = { 1135 .dot11StationId = &priv->mac_addr[0], 1136 }; 1137 1138 /* Remember the decission here to make sure, we will handle 1139 * the RCPI/RSSI value correctly on WSM_EVENT_RCPI_RSS 1140 */ 1141 if (threshold.rssiRcpiMode & WSM_RCPI_RSSI_USE_RSSI) 1142 priv->cqm_use_rssi = true; 1143 1144 if (!priv->sdd) { 1145 ret = request_firmware(&priv->sdd, priv->sdd_path, priv->pdev); 1146 if (ret) { 1147 pr_err("Can't load sdd file %s.\n", priv->sdd_path); 1148 return ret; 1149 } 1150 cw1200_parse_sdd_file(priv); 1151 } 1152 1153 cfg.dpdData = priv->sdd->data; 1154 cfg.dpdData_size = priv->sdd->size; 1155 ret = wsm_configuration(priv, &cfg); 1156 if (ret) 1157 return ret; 1158 1159 /* Configure RSSI/SCPI reporting as RSSI. */ 1160 wsm_set_rcpi_rssi_threshold(priv, &threshold); 1161 1162 return 0; 1163 } 1164 1165 static void cw1200_join_complete(struct cw1200_common *priv) 1166 { 1167 pr_debug("[STA] Join complete (%d)\n", priv->join_complete_status); 1168 1169 priv->join_pending = false; 1170 if (priv->join_complete_status) { 1171 priv->join_status = CW1200_JOIN_STATUS_PASSIVE; 1172 cw1200_update_listening(priv, priv->listening); 1173 cw1200_do_unjoin(priv); 1174 ieee80211_connection_loss(priv->vif); 1175 } else { 1176 if (priv->mode == NL80211_IFTYPE_ADHOC) 1177 priv->join_status = CW1200_JOIN_STATUS_IBSS; 1178 else 1179 priv->join_status = CW1200_JOIN_STATUS_PRE_STA; 1180 } 1181 wsm_unlock_tx(priv); /* Clearing the lock held before do_join() */ 1182 } 1183 1184 void cw1200_join_complete_work(struct work_struct *work) 1185 { 1186 struct cw1200_common *priv = 1187 container_of(work, struct cw1200_common, join_complete_work); 1188 mutex_lock(&priv->conf_mutex); 1189 cw1200_join_complete(priv); 1190 mutex_unlock(&priv->conf_mutex); 1191 } 1192 1193 void cw1200_join_complete_cb(struct cw1200_common *priv, 1194 struct wsm_join_complete *arg) 1195 { 1196 pr_debug("[STA] cw1200_join_complete_cb called, status=%d.\n", 1197 arg->status); 1198 1199 if (cancel_delayed_work(&priv->join_timeout)) { 1200 priv->join_complete_status = arg->status; 1201 queue_work(priv->workqueue, &priv->join_complete_work); 1202 } 1203 } 1204 1205 /* MUST be called with tx_lock held! It will be unlocked for us. */ 1206 static void cw1200_do_join(struct cw1200_common *priv) 1207 { 1208 const u8 *bssid; 1209 struct ieee80211_bss_conf *conf = &priv->vif->bss_conf; 1210 struct cfg80211_bss *bss = NULL; 1211 struct wsm_protected_mgmt_policy mgmt_policy; 1212 struct wsm_join join = { 1213 .mode = priv->vif->cfg.ibss_joined ? 1214 WSM_JOIN_MODE_IBSS : WSM_JOIN_MODE_BSS, 1215 .preamble_type = WSM_JOIN_PREAMBLE_LONG, 1216 .probe_for_join = 1, 1217 .atim_window = 0, 1218 .basic_rate_set = cw1200_rate_mask_to_wsm(priv, 1219 conf->basic_rates), 1220 }; 1221 if (delayed_work_pending(&priv->join_timeout)) { 1222 pr_warn("[STA] - Join request already pending, skipping..\n"); 1223 wsm_unlock_tx(priv); 1224 return; 1225 } 1226 1227 if (priv->join_status) 1228 cw1200_do_unjoin(priv); 1229 1230 bssid = priv->vif->bss_conf.bssid; 1231 1232 bss = cfg80211_get_bss(priv->hw->wiphy, priv->channel, bssid, NULL, 0, 1233 IEEE80211_BSS_TYPE_ANY, IEEE80211_PRIVACY_ANY); 1234 1235 if (!bss && !priv->vif->cfg.ibss_joined) { 1236 wsm_unlock_tx(priv); 1237 return; 1238 } 1239 1240 mutex_lock(&priv->conf_mutex); 1241 1242 /* Under the conf lock: check scan status and 1243 * bail out if it is in progress. 1244 */ 1245 if (atomic_read(&priv->scan.in_progress)) { 1246 wsm_unlock_tx(priv); 1247 goto done_put; 1248 } 1249 1250 priv->join_pending = true; 1251 1252 /* Sanity check basic rates */ 1253 if (!join.basic_rate_set) 1254 join.basic_rate_set = 7; 1255 1256 /* Sanity check beacon interval */ 1257 if (!priv->beacon_int) 1258 priv->beacon_int = 1; 1259 1260 join.beacon_interval = priv->beacon_int; 1261 1262 /* BT Coex related changes */ 1263 if (priv->bt_present) { 1264 if (((priv->conf_listen_interval * 100) % 1265 priv->beacon_int) == 0) 1266 priv->listen_interval = 1267 ((priv->conf_listen_interval * 100) / 1268 priv->beacon_int); 1269 else 1270 priv->listen_interval = 1271 ((priv->conf_listen_interval * 100) / 1272 priv->beacon_int + 1); 1273 } 1274 1275 if (priv->hw->conf.ps_dtim_period) 1276 priv->join_dtim_period = priv->hw->conf.ps_dtim_period; 1277 join.dtim_period = priv->join_dtim_period; 1278 1279 join.channel_number = priv->channel->hw_value; 1280 join.band = (priv->channel->band == NL80211_BAND_5GHZ) ? 1281 WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G; 1282 1283 memcpy(join.bssid, bssid, sizeof(join.bssid)); 1284 1285 pr_debug("[STA] Join BSSID: %pM DTIM: %d, interval: %d\n", 1286 join.bssid, 1287 join.dtim_period, priv->beacon_int); 1288 1289 if (!priv->vif->cfg.ibss_joined) { 1290 const u8 *ssidie; 1291 rcu_read_lock(); 1292 ssidie = ieee80211_bss_get_ie(bss, WLAN_EID_SSID); 1293 if (ssidie) { 1294 join.ssid_len = ssidie[1]; 1295 memcpy(join.ssid, &ssidie[2], join.ssid_len); 1296 } 1297 rcu_read_unlock(); 1298 } 1299 1300 if (priv->vif->p2p) { 1301 join.flags |= WSM_JOIN_FLAGS_P2P_GO; 1302 join.basic_rate_set = 1303 cw1200_rate_mask_to_wsm(priv, 0xFF0); 1304 } 1305 1306 /* Enable asynchronous join calls */ 1307 if (!priv->vif->cfg.ibss_joined) { 1308 join.flags |= WSM_JOIN_FLAGS_FORCE; 1309 join.flags |= WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND; 1310 } 1311 1312 wsm_flush_tx(priv); 1313 1314 /* Stay Awake for Join and Auth Timeouts and a bit more */ 1315 cw1200_pm_stay_awake(&priv->pm_state, 1316 CW1200_JOIN_TIMEOUT + CW1200_AUTH_TIMEOUT); 1317 1318 cw1200_update_listening(priv, false); 1319 1320 /* Turn on Block ACKs */ 1321 wsm_set_block_ack_policy(priv, priv->ba_tx_tid_mask, 1322 priv->ba_rx_tid_mask); 1323 1324 /* Set up timeout */ 1325 if (join.flags & WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND) { 1326 priv->join_status = CW1200_JOIN_STATUS_JOINING; 1327 queue_delayed_work(priv->workqueue, 1328 &priv->join_timeout, 1329 CW1200_JOIN_TIMEOUT); 1330 } 1331 1332 /* 802.11w protected mgmt frames */ 1333 mgmt_policy.protectedMgmtEnable = 0; 1334 mgmt_policy.unprotectedMgmtFramesAllowed = 1; 1335 mgmt_policy.encryptionForAuthFrame = 1; 1336 wsm_set_protected_mgmt_policy(priv, &mgmt_policy); 1337 1338 /* Perform actual join */ 1339 if (wsm_join(priv, &join)) { 1340 pr_err("[STA] cw1200_join_work: wsm_join failed!\n"); 1341 cancel_delayed_work_sync(&priv->join_timeout); 1342 cw1200_update_listening(priv, priv->listening); 1343 /* Tx lock still held, unjoin will clear it. */ 1344 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0) 1345 wsm_unlock_tx(priv); 1346 } else { 1347 if (!(join.flags & WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND)) 1348 cw1200_join_complete(priv); /* Will clear tx_lock */ 1349 1350 /* Upload keys */ 1351 cw1200_upload_keys(priv); 1352 1353 /* Due to beacon filtering it is possible that the 1354 * AP's beacon is not known for the mac80211 stack. 1355 * Disable filtering temporary to make sure the stack 1356 * receives at least one 1357 */ 1358 priv->disable_beacon_filter = true; 1359 } 1360 cw1200_update_filtering(priv); 1361 1362 done_put: 1363 mutex_unlock(&priv->conf_mutex); 1364 if (bss) 1365 cfg80211_put_bss(priv->hw->wiphy, bss); 1366 } 1367 1368 void cw1200_join_timeout(struct work_struct *work) 1369 { 1370 struct cw1200_common *priv = 1371 container_of(work, struct cw1200_common, join_timeout.work); 1372 pr_debug("[WSM] Join timed out.\n"); 1373 wsm_lock_tx(priv); 1374 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0) 1375 wsm_unlock_tx(priv); 1376 } 1377 1378 static void cw1200_do_unjoin(struct cw1200_common *priv) 1379 { 1380 struct wsm_reset reset = { 1381 .reset_statistics = true, 1382 }; 1383 1384 cancel_delayed_work_sync(&priv->join_timeout); 1385 1386 mutex_lock(&priv->conf_mutex); 1387 priv->join_pending = false; 1388 1389 if (atomic_read(&priv->scan.in_progress)) { 1390 if (priv->delayed_unjoin) 1391 wiphy_dbg(priv->hw->wiphy, "Delayed unjoin is already scheduled.\n"); 1392 else 1393 priv->delayed_unjoin = true; 1394 goto done; 1395 } 1396 1397 priv->delayed_link_loss = false; 1398 1399 if (!priv->join_status) 1400 goto done; 1401 1402 if (priv->join_status == CW1200_JOIN_STATUS_AP) 1403 goto done; 1404 1405 cancel_work_sync(&priv->update_filtering_work); 1406 cancel_work_sync(&priv->set_beacon_wakeup_period_work); 1407 priv->join_status = CW1200_JOIN_STATUS_PASSIVE; 1408 1409 /* Unjoin is a reset. */ 1410 wsm_flush_tx(priv); 1411 wsm_keep_alive_period(priv, 0); 1412 wsm_reset(priv, &reset); 1413 wsm_set_output_power(priv, priv->output_power * 10); 1414 priv->join_dtim_period = 0; 1415 cw1200_setup_mac(priv); 1416 cw1200_free_event_queue(priv); 1417 cancel_work_sync(&priv->event_handler); 1418 cw1200_update_listening(priv, priv->listening); 1419 cw1200_cqm_bssloss_sm(priv, 0, 0, 0); 1420 1421 /* Disable Block ACKs */ 1422 wsm_set_block_ack_policy(priv, 0, 0); 1423 1424 priv->disable_beacon_filter = false; 1425 cw1200_update_filtering(priv); 1426 memset(&priv->association_mode, 0, 1427 sizeof(priv->association_mode)); 1428 memset(&priv->bss_params, 0, sizeof(priv->bss_params)); 1429 priv->setbssparams_done = false; 1430 memset(&priv->firmware_ps_mode, 0, 1431 sizeof(priv->firmware_ps_mode)); 1432 1433 pr_debug("[STA] Unjoin completed.\n"); 1434 1435 done: 1436 mutex_unlock(&priv->conf_mutex); 1437 } 1438 1439 void cw1200_unjoin_work(struct work_struct *work) 1440 { 1441 struct cw1200_common *priv = 1442 container_of(work, struct cw1200_common, unjoin_work); 1443 1444 cw1200_do_unjoin(priv); 1445 1446 /* Tell the stack we're dead */ 1447 ieee80211_connection_loss(priv->vif); 1448 1449 wsm_unlock_tx(priv); 1450 } 1451 1452 int cw1200_enable_listening(struct cw1200_common *priv) 1453 { 1454 struct wsm_start start = { 1455 .mode = WSM_START_MODE_P2P_DEV, 1456 .band = WSM_PHY_BAND_2_4G, 1457 .beacon_interval = 100, 1458 .dtim_period = 1, 1459 .probe_delay = 0, 1460 .basic_rate_set = 0x0F, 1461 }; 1462 1463 if (priv->channel) { 1464 start.band = priv->channel->band == NL80211_BAND_5GHZ ? 1465 WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G; 1466 start.channel_number = priv->channel->hw_value; 1467 } else { 1468 start.band = WSM_PHY_BAND_2_4G; 1469 start.channel_number = 1; 1470 } 1471 1472 return wsm_start(priv, &start); 1473 } 1474 1475 int cw1200_disable_listening(struct cw1200_common *priv) 1476 { 1477 int ret; 1478 struct wsm_reset reset = { 1479 .reset_statistics = true, 1480 }; 1481 ret = wsm_reset(priv, &reset); 1482 return ret; 1483 } 1484 1485 void cw1200_update_listening(struct cw1200_common *priv, bool enabled) 1486 { 1487 if (enabled) { 1488 if (priv->join_status == CW1200_JOIN_STATUS_PASSIVE) { 1489 if (!cw1200_enable_listening(priv)) 1490 priv->join_status = CW1200_JOIN_STATUS_MONITOR; 1491 wsm_set_probe_responder(priv, true); 1492 } 1493 } else { 1494 if (priv->join_status == CW1200_JOIN_STATUS_MONITOR) { 1495 if (!cw1200_disable_listening(priv)) 1496 priv->join_status = CW1200_JOIN_STATUS_PASSIVE; 1497 wsm_set_probe_responder(priv, false); 1498 } 1499 } 1500 } 1501 1502 int cw1200_set_uapsd_param(struct cw1200_common *priv, 1503 const struct wsm_edca_params *arg) 1504 { 1505 int ret; 1506 u16 uapsd_flags = 0; 1507 1508 /* Here's the mapping AC [queue, bit] 1509 * VO [0,3], VI [1, 2], BE [2, 1], BK [3, 0] 1510 */ 1511 1512 if (arg->uapsd_enable[0]) 1513 uapsd_flags |= 1 << 3; 1514 1515 if (arg->uapsd_enable[1]) 1516 uapsd_flags |= 1 << 2; 1517 1518 if (arg->uapsd_enable[2]) 1519 uapsd_flags |= 1 << 1; 1520 1521 if (arg->uapsd_enable[3]) 1522 uapsd_flags |= 1; 1523 1524 /* Currently pseudo U-APSD operation is not supported, so setting 1525 * MinAutoTriggerInterval, MaxAutoTriggerInterval and 1526 * AutoTriggerStep to 0 1527 */ 1528 1529 priv->uapsd_info.uapsd_flags = cpu_to_le16(uapsd_flags); 1530 priv->uapsd_info.min_auto_trigger_interval = 0; 1531 priv->uapsd_info.max_auto_trigger_interval = 0; 1532 priv->uapsd_info.auto_trigger_step = 0; 1533 1534 ret = wsm_set_uapsd_info(priv, &priv->uapsd_info); 1535 return ret; 1536 } 1537 1538 /* ******************************************************************** */ 1539 /* AP API */ 1540 1541 int cw1200_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1542 struct ieee80211_sta *sta) 1543 { 1544 struct cw1200_common *priv = hw->priv; 1545 struct cw1200_sta_priv *sta_priv = 1546 (struct cw1200_sta_priv *)&sta->drv_priv; 1547 struct cw1200_link_entry *entry; 1548 struct sk_buff *skb; 1549 1550 if (priv->mode != NL80211_IFTYPE_AP) 1551 return 0; 1552 1553 sta_priv->link_id = cw1200_find_link_id(priv, sta->addr); 1554 if (WARN_ON(!sta_priv->link_id)) { 1555 wiphy_info(priv->hw->wiphy, 1556 "[AP] No more link IDs available.\n"); 1557 return -ENOENT; 1558 } 1559 1560 entry = &priv->link_id_db[sta_priv->link_id - 1]; 1561 spin_lock_bh(&priv->ps_state_lock); 1562 if ((sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK) == 1563 IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK) 1564 priv->sta_asleep_mask |= BIT(sta_priv->link_id); 1565 entry->status = CW1200_LINK_HARD; 1566 while ((skb = skb_dequeue(&entry->rx_queue))) 1567 ieee80211_rx_irqsafe(priv->hw, skb); 1568 spin_unlock_bh(&priv->ps_state_lock); 1569 return 0; 1570 } 1571 1572 int cw1200_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1573 struct ieee80211_sta *sta) 1574 { 1575 struct cw1200_common *priv = hw->priv; 1576 struct cw1200_sta_priv *sta_priv = 1577 (struct cw1200_sta_priv *)&sta->drv_priv; 1578 struct cw1200_link_entry *entry; 1579 1580 if (priv->mode != NL80211_IFTYPE_AP || !sta_priv->link_id) 1581 return 0; 1582 1583 entry = &priv->link_id_db[sta_priv->link_id - 1]; 1584 spin_lock_bh(&priv->ps_state_lock); 1585 entry->status = CW1200_LINK_RESERVE; 1586 entry->timestamp = jiffies; 1587 wsm_lock_tx_async(priv); 1588 if (queue_work(priv->workqueue, &priv->link_id_work) <= 0) 1589 wsm_unlock_tx(priv); 1590 spin_unlock_bh(&priv->ps_state_lock); 1591 flush_workqueue(priv->workqueue); 1592 return 0; 1593 } 1594 1595 static void __cw1200_sta_notify(struct ieee80211_hw *dev, 1596 struct ieee80211_vif *vif, 1597 enum sta_notify_cmd notify_cmd, 1598 int link_id) 1599 { 1600 struct cw1200_common *priv = dev->priv; 1601 u32 bit, prev; 1602 1603 /* Zero link id means "for all link IDs" */ 1604 if (link_id) 1605 bit = BIT(link_id); 1606 else if (WARN_ON_ONCE(notify_cmd != STA_NOTIFY_AWAKE)) 1607 bit = 0; 1608 else 1609 bit = priv->link_id_map; 1610 prev = priv->sta_asleep_mask & bit; 1611 1612 switch (notify_cmd) { 1613 case STA_NOTIFY_SLEEP: 1614 if (!prev) { 1615 if (priv->buffered_multicasts && 1616 !priv->sta_asleep_mask) 1617 queue_work(priv->workqueue, 1618 &priv->multicast_start_work); 1619 priv->sta_asleep_mask |= bit; 1620 } 1621 break; 1622 case STA_NOTIFY_AWAKE: 1623 if (prev) { 1624 priv->sta_asleep_mask &= ~bit; 1625 priv->pspoll_mask &= ~bit; 1626 if (priv->tx_multicast && link_id && 1627 !priv->sta_asleep_mask) 1628 queue_work(priv->workqueue, 1629 &priv->multicast_stop_work); 1630 cw1200_bh_wakeup(priv); 1631 } 1632 break; 1633 } 1634 } 1635 1636 void cw1200_sta_notify(struct ieee80211_hw *dev, 1637 struct ieee80211_vif *vif, 1638 enum sta_notify_cmd notify_cmd, 1639 struct ieee80211_sta *sta) 1640 { 1641 struct cw1200_common *priv = dev->priv; 1642 struct cw1200_sta_priv *sta_priv = 1643 (struct cw1200_sta_priv *)&sta->drv_priv; 1644 1645 spin_lock_bh(&priv->ps_state_lock); 1646 __cw1200_sta_notify(dev, vif, notify_cmd, sta_priv->link_id); 1647 spin_unlock_bh(&priv->ps_state_lock); 1648 } 1649 1650 static void cw1200_ps_notify(struct cw1200_common *priv, 1651 int link_id, bool ps) 1652 { 1653 if (link_id > CW1200_MAX_STA_IN_AP_MODE) 1654 return; 1655 1656 pr_debug("%s for LinkId: %d. STAs asleep: %.8X\n", 1657 ps ? "Stop" : "Start", 1658 link_id, priv->sta_asleep_mask); 1659 1660 __cw1200_sta_notify(priv->hw, priv->vif, 1661 ps ? STA_NOTIFY_SLEEP : STA_NOTIFY_AWAKE, link_id); 1662 } 1663 1664 static int cw1200_set_tim_impl(struct cw1200_common *priv, bool aid0_bit_set) 1665 { 1666 struct sk_buff *skb; 1667 struct wsm_update_ie update_ie = { 1668 .what = WSM_UPDATE_IE_BEACON, 1669 .count = 1, 1670 }; 1671 u16 tim_offset, tim_length; 1672 1673 pr_debug("[AP] mcast: %s.\n", aid0_bit_set ? "ena" : "dis"); 1674 1675 skb = ieee80211_beacon_get_tim(priv->hw, priv->vif, 1676 &tim_offset, &tim_length, 0); 1677 if (!skb) { 1678 if (!__cw1200_flush(priv, true)) 1679 wsm_unlock_tx(priv); 1680 return -ENOENT; 1681 } 1682 1683 if (tim_offset && tim_length >= 6) { 1684 /* Ignore DTIM count from mac80211: 1685 * firmware handles DTIM internally. 1686 */ 1687 skb->data[tim_offset + 2] = 0; 1688 1689 /* Set/reset aid0 bit */ 1690 if (aid0_bit_set) 1691 skb->data[tim_offset + 4] |= 1; 1692 else 1693 skb->data[tim_offset + 4] &= ~1; 1694 } 1695 1696 update_ie.ies = &skb->data[tim_offset]; 1697 update_ie.length = tim_length; 1698 wsm_update_ie(priv, &update_ie); 1699 1700 dev_kfree_skb(skb); 1701 1702 return 0; 1703 } 1704 1705 void cw1200_set_tim_work(struct work_struct *work) 1706 { 1707 struct cw1200_common *priv = 1708 container_of(work, struct cw1200_common, set_tim_work); 1709 (void)cw1200_set_tim_impl(priv, priv->aid0_bit_set); 1710 } 1711 1712 int cw1200_set_tim(struct ieee80211_hw *dev, struct ieee80211_sta *sta, 1713 bool set) 1714 { 1715 struct cw1200_common *priv = dev->priv; 1716 queue_work(priv->workqueue, &priv->set_tim_work); 1717 return 0; 1718 } 1719 1720 void cw1200_set_cts_work(struct work_struct *work) 1721 { 1722 struct cw1200_common *priv = 1723 container_of(work, struct cw1200_common, set_cts_work); 1724 1725 u8 erp_ie[3] = {WLAN_EID_ERP_INFO, 0x1, 0}; 1726 struct wsm_update_ie update_ie = { 1727 .what = WSM_UPDATE_IE_BEACON, 1728 .count = 1, 1729 .ies = erp_ie, 1730 .length = 3, 1731 }; 1732 u32 erp_info; 1733 __le32 use_cts_prot; 1734 mutex_lock(&priv->conf_mutex); 1735 erp_info = priv->erp_info; 1736 mutex_unlock(&priv->conf_mutex); 1737 use_cts_prot = 1738 erp_info & WLAN_ERP_USE_PROTECTION ? 1739 __cpu_to_le32(1) : 0; 1740 1741 erp_ie[ERP_INFO_BYTE_OFFSET] = erp_info; 1742 1743 pr_debug("[STA] ERP information 0x%x\n", erp_info); 1744 1745 wsm_write_mib(priv, WSM_MIB_ID_NON_ERP_PROTECTION, 1746 &use_cts_prot, sizeof(use_cts_prot)); 1747 wsm_update_ie(priv, &update_ie); 1748 1749 return; 1750 } 1751 1752 static int cw1200_set_btcoexinfo(struct cw1200_common *priv) 1753 { 1754 struct wsm_override_internal_txrate arg; 1755 int ret = 0; 1756 1757 if (priv->mode == NL80211_IFTYPE_STATION) { 1758 /* Plumb PSPOLL and NULL template */ 1759 cw1200_upload_pspoll(priv); 1760 cw1200_upload_null(priv); 1761 cw1200_upload_qosnull(priv); 1762 } else { 1763 return 0; 1764 } 1765 1766 memset(&arg, 0, sizeof(struct wsm_override_internal_txrate)); 1767 1768 if (!priv->vif->p2p) { 1769 /* STATION mode */ 1770 if (priv->bss_params.operational_rate_set & ~0xF) { 1771 pr_debug("[STA] STA has ERP rates\n"); 1772 /* G or BG mode */ 1773 arg.internalTxRate = (__ffs( 1774 priv->bss_params.operational_rate_set & ~0xF)); 1775 } else { 1776 pr_debug("[STA] STA has non ERP rates\n"); 1777 /* B only mode */ 1778 arg.internalTxRate = (__ffs(le32_to_cpu(priv->association_mode.basic_rate_set))); 1779 } 1780 arg.nonErpInternalTxRate = (__ffs(le32_to_cpu(priv->association_mode.basic_rate_set))); 1781 } else { 1782 /* P2P mode */ 1783 arg.internalTxRate = (__ffs(priv->bss_params.operational_rate_set & ~0xF)); 1784 arg.nonErpInternalTxRate = (__ffs(priv->bss_params.operational_rate_set & ~0xF)); 1785 } 1786 1787 pr_debug("[STA] BTCOEX_INFO MODE %d, internalTxRate : %x, nonErpInternalTxRate: %x\n", 1788 priv->mode, 1789 arg.internalTxRate, 1790 arg.nonErpInternalTxRate); 1791 1792 ret = wsm_write_mib(priv, WSM_MIB_ID_OVERRIDE_INTERNAL_TX_RATE, 1793 &arg, sizeof(arg)); 1794 1795 return ret; 1796 } 1797 1798 void cw1200_bss_info_changed(struct ieee80211_hw *dev, 1799 struct ieee80211_vif *vif, 1800 struct ieee80211_bss_conf *info, 1801 u64 changed) 1802 { 1803 struct cw1200_common *priv = dev->priv; 1804 bool do_join = false; 1805 1806 mutex_lock(&priv->conf_mutex); 1807 1808 pr_debug("BSS CHANGED: %llx\n", changed); 1809 1810 /* TODO: BSS_CHANGED_QOS */ 1811 /* TODO: BSS_CHANGED_TXPOWER */ 1812 1813 if (changed & BSS_CHANGED_ARP_FILTER) { 1814 struct wsm_mib_arp_ipv4_filter filter = {0}; 1815 int i; 1816 1817 pr_debug("[STA] BSS_CHANGED_ARP_FILTER cnt: %d\n", 1818 vif->cfg.arp_addr_cnt); 1819 1820 /* Currently only one IP address is supported by firmware. 1821 * In case of more IPs arp filtering will be disabled. 1822 */ 1823 if (vif->cfg.arp_addr_cnt > 0 && 1824 vif->cfg.arp_addr_cnt <= WSM_MAX_ARP_IP_ADDRTABLE_ENTRIES) { 1825 for (i = 0; i < vif->cfg.arp_addr_cnt; i++) { 1826 filter.ipv4addrs[i] = vif->cfg.arp_addr_list[i]; 1827 pr_debug("[STA] addr[%d]: 0x%X\n", 1828 i, filter.ipv4addrs[i]); 1829 } 1830 filter.enable = __cpu_to_le32(1); 1831 } 1832 1833 pr_debug("[STA] arp ip filter enable: %d\n", 1834 __le32_to_cpu(filter.enable)); 1835 1836 wsm_set_arp_ipv4_filter(priv, &filter); 1837 } 1838 1839 if (changed & 1840 (BSS_CHANGED_BEACON | 1841 BSS_CHANGED_AP_PROBE_RESP | 1842 BSS_CHANGED_BSSID | 1843 BSS_CHANGED_SSID | 1844 BSS_CHANGED_IBSS)) { 1845 pr_debug("BSS_CHANGED_BEACON\n"); 1846 priv->beacon_int = info->beacon_int; 1847 cw1200_update_beaconing(priv); 1848 cw1200_upload_beacon(priv); 1849 } 1850 1851 if (changed & BSS_CHANGED_BEACON_ENABLED) { 1852 pr_debug("BSS_CHANGED_BEACON_ENABLED (%d)\n", info->enable_beacon); 1853 1854 if (priv->enable_beacon != info->enable_beacon) { 1855 cw1200_enable_beaconing(priv, info->enable_beacon); 1856 priv->enable_beacon = info->enable_beacon; 1857 } 1858 } 1859 1860 if (changed & BSS_CHANGED_BEACON_INT) { 1861 pr_debug("CHANGED_BEACON_INT\n"); 1862 if (vif->cfg.ibss_joined) 1863 do_join = true; 1864 else if (priv->join_status == CW1200_JOIN_STATUS_AP) 1865 cw1200_update_beaconing(priv); 1866 } 1867 1868 /* assoc/disassoc, or maybe AID changed */ 1869 if (changed & BSS_CHANGED_ASSOC) { 1870 wsm_lock_tx(priv); 1871 priv->wep_default_key_id = -1; 1872 wsm_unlock_tx(priv); 1873 } 1874 1875 if (changed & BSS_CHANGED_BSSID) { 1876 pr_debug("BSS_CHANGED_BSSID\n"); 1877 do_join = true; 1878 } 1879 1880 if (changed & 1881 (BSS_CHANGED_ASSOC | 1882 BSS_CHANGED_BSSID | 1883 BSS_CHANGED_IBSS | 1884 BSS_CHANGED_BASIC_RATES | 1885 BSS_CHANGED_HT)) { 1886 pr_debug("BSS_CHANGED_ASSOC\n"); 1887 if (vif->cfg.assoc) { 1888 if (priv->join_status < CW1200_JOIN_STATUS_PRE_STA) { 1889 ieee80211_connection_loss(vif); 1890 mutex_unlock(&priv->conf_mutex); 1891 return; 1892 } else if (priv->join_status == CW1200_JOIN_STATUS_PRE_STA) { 1893 priv->join_status = CW1200_JOIN_STATUS_STA; 1894 } 1895 } else { 1896 do_join = true; 1897 } 1898 1899 if (vif->cfg.assoc || vif->cfg.ibss_joined) { 1900 struct ieee80211_sta *sta = NULL; 1901 __le32 htprot = 0; 1902 1903 if (info->dtim_period) 1904 priv->join_dtim_period = info->dtim_period; 1905 priv->beacon_int = info->beacon_int; 1906 1907 rcu_read_lock(); 1908 1909 if (info->bssid && !vif->cfg.ibss_joined) 1910 sta = ieee80211_find_sta(vif, info->bssid); 1911 if (sta) { 1912 priv->ht_info.ht_cap = sta->deflink.ht_cap; 1913 priv->bss_params.operational_rate_set = 1914 cw1200_rate_mask_to_wsm(priv, 1915 sta->deflink.supp_rates[priv->channel->band]); 1916 priv->ht_info.channel_type = cfg80211_get_chandef_type(&dev->conf.chandef); 1917 priv->ht_info.operation_mode = info->ht_operation_mode; 1918 } else { 1919 memset(&priv->ht_info, 0, 1920 sizeof(priv->ht_info)); 1921 priv->bss_params.operational_rate_set = -1; 1922 } 1923 rcu_read_unlock(); 1924 1925 /* Non Greenfield stations present */ 1926 if (priv->ht_info.operation_mode & 1927 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT) 1928 htprot |= cpu_to_le32(WSM_NON_GREENFIELD_STA_PRESENT); 1929 1930 /* Set HT protection method */ 1931 htprot |= cpu_to_le32((priv->ht_info.operation_mode & IEEE80211_HT_OP_MODE_PROTECTION) << 2); 1932 1933 /* TODO: 1934 * STBC_param.dual_cts 1935 * STBC_param.LSIG_TXOP_FILL 1936 */ 1937 1938 wsm_write_mib(priv, WSM_MIB_ID_SET_HT_PROTECTION, 1939 &htprot, sizeof(htprot)); 1940 1941 priv->association_mode.greenfield = 1942 cw1200_ht_greenfield(&priv->ht_info); 1943 priv->association_mode.flags = 1944 WSM_ASSOCIATION_MODE_SNOOP_ASSOC_FRAMES | 1945 WSM_ASSOCIATION_MODE_USE_PREAMBLE_TYPE | 1946 WSM_ASSOCIATION_MODE_USE_HT_MODE | 1947 WSM_ASSOCIATION_MODE_USE_BASIC_RATE_SET | 1948 WSM_ASSOCIATION_MODE_USE_MPDU_START_SPACING; 1949 priv->association_mode.preamble = 1950 info->use_short_preamble ? 1951 WSM_JOIN_PREAMBLE_SHORT : 1952 WSM_JOIN_PREAMBLE_LONG; 1953 priv->association_mode.basic_rate_set = __cpu_to_le32( 1954 cw1200_rate_mask_to_wsm(priv, 1955 info->basic_rates)); 1956 priv->association_mode.mpdu_start_spacing = 1957 cw1200_ht_ampdu_density(&priv->ht_info); 1958 1959 cw1200_cqm_bssloss_sm(priv, 0, 0, 0); 1960 cancel_work_sync(&priv->unjoin_work); 1961 1962 priv->bss_params.beacon_lost_count = priv->cqm_beacon_loss_count; 1963 priv->bss_params.aid = vif->cfg.aid; 1964 1965 if (priv->join_dtim_period < 1) 1966 priv->join_dtim_period = 1; 1967 1968 pr_debug("[STA] DTIM %d, interval: %d\n", 1969 priv->join_dtim_period, priv->beacon_int); 1970 pr_debug("[STA] Preamble: %d, Greenfield: %d, Aid: %d, Rates: 0x%.8X, Basic: 0x%.8X\n", 1971 priv->association_mode.preamble, 1972 priv->association_mode.greenfield, 1973 priv->bss_params.aid, 1974 priv->bss_params.operational_rate_set, 1975 priv->association_mode.basic_rate_set); 1976 wsm_set_association_mode(priv, &priv->association_mode); 1977 1978 if (!vif->cfg.ibss_joined) { 1979 wsm_keep_alive_period(priv, 30 /* sec */); 1980 wsm_set_bss_params(priv, &priv->bss_params); 1981 priv->setbssparams_done = true; 1982 cw1200_set_beacon_wakeup_period_work(&priv->set_beacon_wakeup_period_work); 1983 cw1200_set_pm(priv, &priv->powersave_mode); 1984 } 1985 if (priv->vif->p2p) { 1986 pr_debug("[STA] Setting p2p powersave configuration.\n"); 1987 wsm_set_p2p_ps_modeinfo(priv, 1988 &priv->p2p_ps_modeinfo); 1989 } 1990 if (priv->bt_present) 1991 cw1200_set_btcoexinfo(priv); 1992 } else { 1993 memset(&priv->association_mode, 0, 1994 sizeof(priv->association_mode)); 1995 memset(&priv->bss_params, 0, sizeof(priv->bss_params)); 1996 } 1997 } 1998 1999 /* ERP Protection */ 2000 if (changed & (BSS_CHANGED_ASSOC | 2001 BSS_CHANGED_ERP_CTS_PROT | 2002 BSS_CHANGED_ERP_PREAMBLE)) { 2003 u32 prev_erp_info = priv->erp_info; 2004 if (info->use_cts_prot) 2005 priv->erp_info |= WLAN_ERP_USE_PROTECTION; 2006 else if (!(prev_erp_info & WLAN_ERP_NON_ERP_PRESENT)) 2007 priv->erp_info &= ~WLAN_ERP_USE_PROTECTION; 2008 2009 if (info->use_short_preamble) 2010 priv->erp_info |= WLAN_ERP_BARKER_PREAMBLE; 2011 else 2012 priv->erp_info &= ~WLAN_ERP_BARKER_PREAMBLE; 2013 2014 pr_debug("[STA] ERP Protection: %x\n", priv->erp_info); 2015 2016 if (prev_erp_info != priv->erp_info) 2017 queue_work(priv->workqueue, &priv->set_cts_work); 2018 } 2019 2020 /* ERP Slottime */ 2021 if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_ERP_SLOT)) { 2022 __le32 slot_time = info->use_short_slot ? 2023 __cpu_to_le32(9) : __cpu_to_le32(20); 2024 pr_debug("[STA] Slot time: %d us.\n", 2025 __le32_to_cpu(slot_time)); 2026 wsm_write_mib(priv, WSM_MIB_ID_DOT11_SLOT_TIME, 2027 &slot_time, sizeof(slot_time)); 2028 } 2029 2030 if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_CQM)) { 2031 struct wsm_rcpi_rssi_threshold threshold = { 2032 .rollingAverageCount = 8, 2033 }; 2034 pr_debug("[CQM] RSSI threshold subscribe: %d +- %d\n", 2035 info->cqm_rssi_thold, info->cqm_rssi_hyst); 2036 priv->cqm_rssi_thold = info->cqm_rssi_thold; 2037 priv->cqm_rssi_hyst = info->cqm_rssi_hyst; 2038 2039 if (info->cqm_rssi_thold || info->cqm_rssi_hyst) { 2040 /* RSSI subscription enabled */ 2041 /* TODO: It's not a correct way of setting threshold. 2042 * Upper and lower must be set equal here and adjusted 2043 * in callback. However current implementation is much 2044 * more relaible and stable. 2045 */ 2046 2047 /* RSSI: signed Q8.0, RCPI: unsigned Q7.1 2048 * RSSI = RCPI / 2 - 110 2049 */ 2050 if (priv->cqm_use_rssi) { 2051 threshold.upperThreshold = 2052 info->cqm_rssi_thold + info->cqm_rssi_hyst; 2053 threshold.lowerThreshold = 2054 info->cqm_rssi_thold; 2055 threshold.rssiRcpiMode |= WSM_RCPI_RSSI_USE_RSSI; 2056 } else { 2057 threshold.upperThreshold = (info->cqm_rssi_thold + info->cqm_rssi_hyst + 110) * 2; 2058 threshold.lowerThreshold = (info->cqm_rssi_thold + 110) * 2; 2059 } 2060 threshold.rssiRcpiMode |= WSM_RCPI_RSSI_THRESHOLD_ENABLE; 2061 } else { 2062 /* There is a bug in FW, see sta.c. We have to enable 2063 * dummy subscription to get correct RSSI values. 2064 */ 2065 threshold.rssiRcpiMode |= 2066 WSM_RCPI_RSSI_THRESHOLD_ENABLE | 2067 WSM_RCPI_RSSI_DONT_USE_UPPER | 2068 WSM_RCPI_RSSI_DONT_USE_LOWER; 2069 if (priv->cqm_use_rssi) 2070 threshold.rssiRcpiMode |= WSM_RCPI_RSSI_USE_RSSI; 2071 } 2072 wsm_set_rcpi_rssi_threshold(priv, &threshold); 2073 } 2074 mutex_unlock(&priv->conf_mutex); 2075 2076 if (do_join) { 2077 wsm_lock_tx(priv); 2078 cw1200_do_join(priv); /* Will unlock it for us */ 2079 } 2080 } 2081 2082 void cw1200_multicast_start_work(struct work_struct *work) 2083 { 2084 struct cw1200_common *priv = 2085 container_of(work, struct cw1200_common, multicast_start_work); 2086 long tmo = priv->join_dtim_period * 2087 (priv->beacon_int + 20) * HZ / 1024; 2088 2089 cancel_work_sync(&priv->multicast_stop_work); 2090 2091 if (!priv->aid0_bit_set) { 2092 wsm_lock_tx(priv); 2093 cw1200_set_tim_impl(priv, true); 2094 priv->aid0_bit_set = true; 2095 mod_timer(&priv->mcast_timeout, jiffies + tmo); 2096 wsm_unlock_tx(priv); 2097 } 2098 } 2099 2100 void cw1200_multicast_stop_work(struct work_struct *work) 2101 { 2102 struct cw1200_common *priv = 2103 container_of(work, struct cw1200_common, multicast_stop_work); 2104 2105 if (priv->aid0_bit_set) { 2106 timer_delete_sync(&priv->mcast_timeout); 2107 wsm_lock_tx(priv); 2108 priv->aid0_bit_set = false; 2109 cw1200_set_tim_impl(priv, false); 2110 wsm_unlock_tx(priv); 2111 } 2112 } 2113 2114 void cw1200_mcast_timeout(struct timer_list *t) 2115 { 2116 struct cw1200_common *priv = timer_container_of(priv, t, 2117 mcast_timeout); 2118 2119 wiphy_warn(priv->hw->wiphy, 2120 "Multicast delivery timeout.\n"); 2121 spin_lock_bh(&priv->ps_state_lock); 2122 priv->tx_multicast = priv->aid0_bit_set && 2123 priv->buffered_multicasts; 2124 if (priv->tx_multicast) 2125 cw1200_bh_wakeup(priv); 2126 spin_unlock_bh(&priv->ps_state_lock); 2127 } 2128 2129 int cw1200_ampdu_action(struct ieee80211_hw *hw, 2130 struct ieee80211_vif *vif, 2131 struct ieee80211_ampdu_params *params) 2132 { 2133 /* Aggregation is implemented fully in firmware, 2134 * including block ack negotiation. Do not allow 2135 * mac80211 stack to do anything: it interferes with 2136 * the firmware. 2137 */ 2138 2139 /* Note that we still need this function stubbed. */ 2140 return -ENOTSUPP; 2141 } 2142 2143 /* ******************************************************************** */ 2144 /* WSM callback */ 2145 void cw1200_suspend_resume(struct cw1200_common *priv, 2146 struct wsm_suspend_resume *arg) 2147 { 2148 pr_debug("[AP] %s: %s\n", 2149 arg->stop ? "stop" : "start", 2150 arg->multicast ? "broadcast" : "unicast"); 2151 2152 if (arg->multicast) { 2153 bool cancel_tmo = false; 2154 spin_lock_bh(&priv->ps_state_lock); 2155 if (arg->stop) { 2156 priv->tx_multicast = false; 2157 } else { 2158 /* Firmware sends this indication every DTIM if there 2159 * is a STA in powersave connected. There is no reason 2160 * to suspend, following wakeup will consume much more 2161 * power than it could be saved. 2162 */ 2163 cw1200_pm_stay_awake(&priv->pm_state, 2164 priv->join_dtim_period * 2165 (priv->beacon_int + 20) * HZ / 1024); 2166 priv->tx_multicast = (priv->aid0_bit_set && 2167 priv->buffered_multicasts); 2168 if (priv->tx_multicast) { 2169 cancel_tmo = true; 2170 cw1200_bh_wakeup(priv); 2171 } 2172 } 2173 spin_unlock_bh(&priv->ps_state_lock); 2174 if (cancel_tmo) 2175 timer_delete_sync(&priv->mcast_timeout); 2176 } else { 2177 spin_lock_bh(&priv->ps_state_lock); 2178 cw1200_ps_notify(priv, arg->link_id, arg->stop); 2179 spin_unlock_bh(&priv->ps_state_lock); 2180 if (!arg->stop) 2181 cw1200_bh_wakeup(priv); 2182 } 2183 return; 2184 } 2185 2186 /* ******************************************************************** */ 2187 /* AP privates */ 2188 2189 static int cw1200_upload_beacon(struct cw1200_common *priv) 2190 { 2191 int ret = 0; 2192 struct ieee80211_mgmt *mgmt; 2193 struct wsm_template_frame frame = { 2194 .frame_type = WSM_FRAME_TYPE_BEACON, 2195 }; 2196 2197 u16 tim_offset; 2198 u16 tim_len; 2199 2200 if (priv->mode == NL80211_IFTYPE_STATION || 2201 priv->mode == NL80211_IFTYPE_MONITOR || 2202 priv->mode == NL80211_IFTYPE_UNSPECIFIED) 2203 goto done; 2204 2205 if (priv->vif->p2p) 2206 frame.rate = WSM_TRANSMIT_RATE_6; 2207 2208 frame.skb = ieee80211_beacon_get_tim(priv->hw, priv->vif, 2209 &tim_offset, &tim_len, 0); 2210 if (!frame.skb) 2211 return -ENOMEM; 2212 2213 ret = wsm_set_template_frame(priv, &frame); 2214 2215 if (ret) 2216 goto done; 2217 2218 /* TODO: Distill probe resp; remove TIM 2219 * and any other beacon-specific IEs 2220 */ 2221 mgmt = (void *)frame.skb->data; 2222 mgmt->frame_control = 2223 __cpu_to_le16(IEEE80211_FTYPE_MGMT | 2224 IEEE80211_STYPE_PROBE_RESP); 2225 2226 frame.frame_type = WSM_FRAME_TYPE_PROBE_RESPONSE; 2227 if (priv->vif->p2p) { 2228 ret = wsm_set_probe_responder(priv, true); 2229 } else { 2230 ret = wsm_set_template_frame(priv, &frame); 2231 wsm_set_probe_responder(priv, false); 2232 } 2233 2234 done: 2235 dev_kfree_skb(frame.skb); 2236 2237 return ret; 2238 } 2239 2240 static int cw1200_upload_pspoll(struct cw1200_common *priv) 2241 { 2242 int ret = 0; 2243 struct wsm_template_frame frame = { 2244 .frame_type = WSM_FRAME_TYPE_PS_POLL, 2245 .rate = 0xFF, 2246 }; 2247 2248 2249 frame.skb = ieee80211_pspoll_get(priv->hw, priv->vif); 2250 if (!frame.skb) 2251 return -ENOMEM; 2252 2253 ret = wsm_set_template_frame(priv, &frame); 2254 2255 dev_kfree_skb(frame.skb); 2256 2257 return ret; 2258 } 2259 2260 static int cw1200_upload_null(struct cw1200_common *priv) 2261 { 2262 int ret = 0; 2263 struct wsm_template_frame frame = { 2264 .frame_type = WSM_FRAME_TYPE_NULL, 2265 .rate = 0xFF, 2266 }; 2267 2268 frame.skb = ieee80211_nullfunc_get(priv->hw, priv->vif,-1, false); 2269 if (!frame.skb) 2270 return -ENOMEM; 2271 2272 ret = wsm_set_template_frame(priv, &frame); 2273 2274 dev_kfree_skb(frame.skb); 2275 2276 return ret; 2277 } 2278 2279 static int cw1200_upload_qosnull(struct cw1200_common *priv) 2280 { 2281 /* TODO: This needs to be implemented 2282 2283 struct wsm_template_frame frame = { 2284 .frame_type = WSM_FRAME_TYPE_QOS_NULL, 2285 .rate = 0xFF, 2286 }; 2287 2288 frame.skb = ieee80211_qosnullfunc_get(priv->hw, priv->vif); 2289 if (!frame.skb) 2290 return -ENOMEM; 2291 2292 ret = wsm_set_template_frame(priv, &frame); 2293 2294 dev_kfree_skb(frame.skb); 2295 2296 */ 2297 return 0; 2298 } 2299 2300 static int cw1200_enable_beaconing(struct cw1200_common *priv, 2301 bool enable) 2302 { 2303 struct wsm_beacon_transmit transmit = { 2304 .enable_beaconing = enable, 2305 }; 2306 2307 return wsm_beacon_transmit(priv, &transmit); 2308 } 2309 2310 static int cw1200_start_ap(struct cw1200_common *priv) 2311 { 2312 int ret; 2313 struct ieee80211_bss_conf *conf = &priv->vif->bss_conf; 2314 struct wsm_start start = { 2315 .mode = priv->vif->p2p ? 2316 WSM_START_MODE_P2P_GO : WSM_START_MODE_AP, 2317 .band = (priv->channel->band == NL80211_BAND_5GHZ) ? 2318 WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G, 2319 .channel_number = priv->channel->hw_value, 2320 .beacon_interval = conf->beacon_int, 2321 .dtim_period = conf->dtim_period, 2322 .preamble = conf->use_short_preamble ? 2323 WSM_JOIN_PREAMBLE_SHORT : 2324 WSM_JOIN_PREAMBLE_LONG, 2325 .probe_delay = 100, 2326 .basic_rate_set = cw1200_rate_mask_to_wsm(priv, 2327 conf->basic_rates), 2328 }; 2329 struct wsm_operational_mode mode = { 2330 .power_mode = cw1200_power_mode, 2331 .disable_more_flag_usage = true, 2332 }; 2333 2334 memset(start.ssid, 0, sizeof(start.ssid)); 2335 if (!conf->hidden_ssid) { 2336 start.ssid_len = priv->vif->cfg.ssid_len; 2337 memcpy(start.ssid, priv->vif->cfg.ssid, start.ssid_len); 2338 } 2339 2340 priv->beacon_int = conf->beacon_int; 2341 priv->join_dtim_period = conf->dtim_period; 2342 2343 memset(&priv->link_id_db, 0, sizeof(priv->link_id_db)); 2344 2345 pr_debug("[AP] ch: %d(%d), bcn: %d(%d), brt: 0x%.8X, ssid: %.*s.\n", 2346 start.channel_number, start.band, 2347 start.beacon_interval, start.dtim_period, 2348 start.basic_rate_set, 2349 start.ssid_len, start.ssid); 2350 ret = wsm_start(priv, &start); 2351 if (!ret) 2352 ret = cw1200_upload_keys(priv); 2353 if (!ret && priv->vif->p2p) { 2354 pr_debug("[AP] Setting p2p powersave configuration.\n"); 2355 wsm_set_p2p_ps_modeinfo(priv, &priv->p2p_ps_modeinfo); 2356 } 2357 if (!ret) { 2358 wsm_set_block_ack_policy(priv, 0, 0); 2359 priv->join_status = CW1200_JOIN_STATUS_AP; 2360 cw1200_update_filtering(priv); 2361 } 2362 wsm_set_operational_mode(priv, &mode); 2363 return ret; 2364 } 2365 2366 static int cw1200_update_beaconing(struct cw1200_common *priv) 2367 { 2368 struct ieee80211_bss_conf *conf = &priv->vif->bss_conf; 2369 struct wsm_reset reset = { 2370 .link_id = 0, 2371 .reset_statistics = true, 2372 }; 2373 2374 if (priv->mode == NL80211_IFTYPE_AP) { 2375 /* TODO: check if changed channel, band */ 2376 if (priv->join_status != CW1200_JOIN_STATUS_AP || 2377 priv->beacon_int != conf->beacon_int) { 2378 pr_debug("ap restarting\n"); 2379 wsm_lock_tx(priv); 2380 if (priv->join_status != CW1200_JOIN_STATUS_PASSIVE) 2381 wsm_reset(priv, &reset); 2382 priv->join_status = CW1200_JOIN_STATUS_PASSIVE; 2383 cw1200_start_ap(priv); 2384 wsm_unlock_tx(priv); 2385 } else 2386 pr_debug("ap started join_status: %d\n", 2387 priv->join_status); 2388 } 2389 return 0; 2390 } 2391