1 /* 2 * Mac80211 STA API for ST-Ericsson CW1200 drivers 3 * 4 * Copyright (c) 2010, ST-Ericsson 5 * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no> 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License version 2 as 9 * published by the Free Software Foundation. 10 */ 11 12 #include <linux/vmalloc.h> 13 #include <linux/sched.h> 14 #include <linux/firmware.h> 15 #include <linux/module.h> 16 #include <linux/etherdevice.h> 17 18 #include "cw1200.h" 19 #include "sta.h" 20 #include "fwio.h" 21 #include "bh.h" 22 #include "debug.h" 23 24 #ifndef ERP_INFO_BYTE_OFFSET 25 #define ERP_INFO_BYTE_OFFSET 2 26 #endif 27 28 static void cw1200_do_join(struct cw1200_common *priv); 29 static void cw1200_do_unjoin(struct cw1200_common *priv); 30 31 static int cw1200_upload_beacon(struct cw1200_common *priv); 32 static int cw1200_upload_pspoll(struct cw1200_common *priv); 33 static int cw1200_upload_null(struct cw1200_common *priv); 34 static int cw1200_upload_qosnull(struct cw1200_common *priv); 35 static int cw1200_start_ap(struct cw1200_common *priv); 36 static int cw1200_update_beaconing(struct cw1200_common *priv); 37 static int cw1200_enable_beaconing(struct cw1200_common *priv, 38 bool enable); 39 static void __cw1200_sta_notify(struct ieee80211_hw *dev, 40 struct ieee80211_vif *vif, 41 enum sta_notify_cmd notify_cmd, 42 int link_id); 43 static int __cw1200_flush(struct cw1200_common *priv, bool drop); 44 45 static inline void __cw1200_free_event_queue(struct list_head *list) 46 { 47 struct cw1200_wsm_event *event, *tmp; 48 list_for_each_entry_safe(event, tmp, list, link) { 49 list_del(&event->link); 50 kfree(event); 51 } 52 } 53 54 /* ******************************************************************** */ 55 /* STA API */ 56 57 int cw1200_start(struct ieee80211_hw *dev) 58 { 59 struct cw1200_common *priv = dev->priv; 60 int ret = 0; 61 62 cw1200_pm_stay_awake(&priv->pm_state, HZ); 63 64 mutex_lock(&priv->conf_mutex); 65 66 /* default EDCA */ 67 WSM_EDCA_SET(&priv->edca, 0, 0x0002, 0x0003, 0x0007, 47, 0xc8, false); 68 WSM_EDCA_SET(&priv->edca, 1, 0x0002, 0x0007, 0x000f, 94, 0xc8, false); 69 WSM_EDCA_SET(&priv->edca, 2, 0x0003, 0x000f, 0x03ff, 0, 0xc8, false); 70 WSM_EDCA_SET(&priv->edca, 3, 0x0007, 0x000f, 0x03ff, 0, 0xc8, false); 71 ret = wsm_set_edca_params(priv, &priv->edca); 72 if (ret) 73 goto out; 74 75 ret = cw1200_set_uapsd_param(priv, &priv->edca); 76 if (ret) 77 goto out; 78 79 priv->setbssparams_done = false; 80 81 memcpy(priv->mac_addr, dev->wiphy->perm_addr, ETH_ALEN); 82 priv->mode = NL80211_IFTYPE_MONITOR; 83 priv->wep_default_key_id = -1; 84 85 priv->cqm_beacon_loss_count = 10; 86 87 ret = cw1200_setup_mac(priv); 88 if (ret) 89 goto out; 90 91 out: 92 mutex_unlock(&priv->conf_mutex); 93 return ret; 94 } 95 96 void cw1200_stop(struct ieee80211_hw *dev) 97 { 98 struct cw1200_common *priv = dev->priv; 99 LIST_HEAD(list); 100 int i; 101 102 wsm_lock_tx(priv); 103 104 while (down_trylock(&priv->scan.lock)) { 105 /* Scan is in progress. Force it to stop. */ 106 priv->scan.req = NULL; 107 schedule(); 108 } 109 up(&priv->scan.lock); 110 111 cancel_delayed_work_sync(&priv->scan.probe_work); 112 cancel_delayed_work_sync(&priv->scan.timeout); 113 cancel_delayed_work_sync(&priv->clear_recent_scan_work); 114 cancel_delayed_work_sync(&priv->join_timeout); 115 cw1200_cqm_bssloss_sm(priv, 0, 0, 0); 116 cancel_work_sync(&priv->unjoin_work); 117 cancel_delayed_work_sync(&priv->link_id_gc_work); 118 flush_workqueue(priv->workqueue); 119 del_timer_sync(&priv->mcast_timeout); 120 mutex_lock(&priv->conf_mutex); 121 priv->mode = NL80211_IFTYPE_UNSPECIFIED; 122 priv->listening = false; 123 124 spin_lock(&priv->event_queue_lock); 125 list_splice_init(&priv->event_queue, &list); 126 spin_unlock(&priv->event_queue_lock); 127 __cw1200_free_event_queue(&list); 128 129 130 priv->join_status = CW1200_JOIN_STATUS_PASSIVE; 131 priv->join_pending = false; 132 133 for (i = 0; i < 4; i++) 134 cw1200_queue_clear(&priv->tx_queue[i]); 135 mutex_unlock(&priv->conf_mutex); 136 tx_policy_clean(priv); 137 138 /* HACK! */ 139 if (atomic_xchg(&priv->tx_lock, 1) != 1) 140 pr_debug("[STA] TX is force-unlocked due to stop request.\n"); 141 142 wsm_unlock_tx(priv); 143 atomic_xchg(&priv->tx_lock, 0); /* for recovery to work */ 144 } 145 146 static int cw1200_bssloss_mitigation = 1; 147 module_param(cw1200_bssloss_mitigation, int, 0644); 148 MODULE_PARM_DESC(cw1200_bssloss_mitigation, "BSS Loss mitigation. 0 == disabled, 1 == enabled (default)"); 149 150 151 void __cw1200_cqm_bssloss_sm(struct cw1200_common *priv, 152 int init, int good, int bad) 153 { 154 int tx = 0; 155 156 priv->delayed_link_loss = 0; 157 cancel_work_sync(&priv->bss_params_work); 158 159 pr_debug("[STA] CQM BSSLOSS_SM: state: %d init %d good %d bad: %d txlock: %d uj: %d\n", 160 priv->bss_loss_state, 161 init, good, bad, 162 atomic_read(&priv->tx_lock), 163 priv->delayed_unjoin); 164 165 /* If we have a pending unjoin */ 166 if (priv->delayed_unjoin) 167 return; 168 169 if (init) { 170 queue_delayed_work(priv->workqueue, 171 &priv->bss_loss_work, 172 HZ); 173 priv->bss_loss_state = 0; 174 175 /* Skip the confimration procedure in P2P case */ 176 if (!priv->vif->p2p && !atomic_read(&priv->tx_lock)) 177 tx = 1; 178 } else if (good) { 179 cancel_delayed_work_sync(&priv->bss_loss_work); 180 priv->bss_loss_state = 0; 181 queue_work(priv->workqueue, &priv->bss_params_work); 182 } else if (bad) { 183 /* XXX Should we just keep going until we time out? */ 184 if (priv->bss_loss_state < 3) 185 tx = 1; 186 } else { 187 cancel_delayed_work_sync(&priv->bss_loss_work); 188 priv->bss_loss_state = 0; 189 } 190 191 /* Bypass mitigation if it's disabled */ 192 if (!cw1200_bssloss_mitigation) 193 tx = 0; 194 195 /* Spit out a NULL packet to our AP if necessary */ 196 if (tx) { 197 struct sk_buff *skb; 198 199 priv->bss_loss_state++; 200 201 skb = ieee80211_nullfunc_get(priv->hw, priv->vif); 202 WARN_ON(!skb); 203 if (skb) 204 cw1200_tx(priv->hw, NULL, skb); 205 } 206 } 207 208 int cw1200_add_interface(struct ieee80211_hw *dev, 209 struct ieee80211_vif *vif) 210 { 211 int ret; 212 struct cw1200_common *priv = dev->priv; 213 /* __le32 auto_calibration_mode = __cpu_to_le32(1); */ 214 215 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER | 216 IEEE80211_VIF_SUPPORTS_UAPSD | 217 IEEE80211_VIF_SUPPORTS_CQM_RSSI; 218 219 mutex_lock(&priv->conf_mutex); 220 221 if (priv->mode != NL80211_IFTYPE_MONITOR) { 222 mutex_unlock(&priv->conf_mutex); 223 return -EOPNOTSUPP; 224 } 225 226 switch (vif->type) { 227 case NL80211_IFTYPE_STATION: 228 case NL80211_IFTYPE_ADHOC: 229 case NL80211_IFTYPE_MESH_POINT: 230 case NL80211_IFTYPE_AP: 231 priv->mode = vif->type; 232 break; 233 default: 234 mutex_unlock(&priv->conf_mutex); 235 return -EOPNOTSUPP; 236 } 237 238 priv->vif = vif; 239 memcpy(priv->mac_addr, vif->addr, ETH_ALEN); 240 ret = cw1200_setup_mac(priv); 241 /* Enable auto-calibration */ 242 /* Exception in subsequent channel switch; disabled. 243 * wsm_write_mib(priv, WSM_MIB_ID_SET_AUTO_CALIBRATION_MODE, 244 * &auto_calibration_mode, sizeof(auto_calibration_mode)); 245 */ 246 247 mutex_unlock(&priv->conf_mutex); 248 return ret; 249 } 250 251 void cw1200_remove_interface(struct ieee80211_hw *dev, 252 struct ieee80211_vif *vif) 253 { 254 struct cw1200_common *priv = dev->priv; 255 struct wsm_reset reset = { 256 .reset_statistics = true, 257 }; 258 int i; 259 260 mutex_lock(&priv->conf_mutex); 261 switch (priv->join_status) { 262 case CW1200_JOIN_STATUS_JOINING: 263 case CW1200_JOIN_STATUS_PRE_STA: 264 case CW1200_JOIN_STATUS_STA: 265 case CW1200_JOIN_STATUS_IBSS: 266 wsm_lock_tx(priv); 267 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0) 268 wsm_unlock_tx(priv); 269 break; 270 case CW1200_JOIN_STATUS_AP: 271 for (i = 0; priv->link_id_map; ++i) { 272 if (priv->link_id_map & BIT(i)) { 273 reset.link_id = i; 274 wsm_reset(priv, &reset); 275 priv->link_id_map &= ~BIT(i); 276 } 277 } 278 memset(priv->link_id_db, 0, sizeof(priv->link_id_db)); 279 priv->sta_asleep_mask = 0; 280 priv->enable_beacon = false; 281 priv->tx_multicast = false; 282 priv->aid0_bit_set = false; 283 priv->buffered_multicasts = false; 284 priv->pspoll_mask = 0; 285 reset.link_id = 0; 286 wsm_reset(priv, &reset); 287 break; 288 case CW1200_JOIN_STATUS_MONITOR: 289 cw1200_update_listening(priv, false); 290 break; 291 default: 292 break; 293 } 294 priv->vif = NULL; 295 priv->mode = NL80211_IFTYPE_MONITOR; 296 eth_zero_addr(priv->mac_addr); 297 memset(&priv->p2p_ps_modeinfo, 0, sizeof(priv->p2p_ps_modeinfo)); 298 cw1200_free_keys(priv); 299 cw1200_setup_mac(priv); 300 priv->listening = false; 301 priv->join_status = CW1200_JOIN_STATUS_PASSIVE; 302 if (!__cw1200_flush(priv, true)) 303 wsm_unlock_tx(priv); 304 305 mutex_unlock(&priv->conf_mutex); 306 } 307 308 int cw1200_change_interface(struct ieee80211_hw *dev, 309 struct ieee80211_vif *vif, 310 enum nl80211_iftype new_type, 311 bool p2p) 312 { 313 int ret = 0; 314 pr_debug("change_interface new: %d (%d), old: %d (%d)\n", new_type, 315 p2p, vif->type, vif->p2p); 316 317 if (new_type != vif->type || vif->p2p != p2p) { 318 cw1200_remove_interface(dev, vif); 319 vif->type = new_type; 320 vif->p2p = p2p; 321 ret = cw1200_add_interface(dev, vif); 322 } 323 324 return ret; 325 } 326 327 int cw1200_config(struct ieee80211_hw *dev, u32 changed) 328 { 329 int ret = 0; 330 struct cw1200_common *priv = dev->priv; 331 struct ieee80211_conf *conf = &dev->conf; 332 333 pr_debug("CONFIG CHANGED: %08x\n", changed); 334 335 down(&priv->scan.lock); 336 mutex_lock(&priv->conf_mutex); 337 /* TODO: IEEE80211_CONF_CHANGE_QOS */ 338 /* TODO: IEEE80211_CONF_CHANGE_LISTEN_INTERVAL */ 339 340 if (changed & IEEE80211_CONF_CHANGE_POWER) { 341 priv->output_power = conf->power_level; 342 pr_debug("[STA] TX power: %d\n", priv->output_power); 343 wsm_set_output_power(priv, priv->output_power * 10); 344 } 345 346 if ((changed & IEEE80211_CONF_CHANGE_CHANNEL) && 347 (priv->channel != conf->chandef.chan)) { 348 struct ieee80211_channel *ch = conf->chandef.chan; 349 struct wsm_switch_channel channel = { 350 .channel_number = ch->hw_value, 351 }; 352 pr_debug("[STA] Freq %d (wsm ch: %d).\n", 353 ch->center_freq, ch->hw_value); 354 355 /* __cw1200_flush() implicitly locks tx, if successful */ 356 if (!__cw1200_flush(priv, false)) { 357 if (!wsm_switch_channel(priv, &channel)) { 358 ret = wait_event_timeout(priv->channel_switch_done, 359 !priv->channel_switch_in_progress, 360 3 * HZ); 361 if (ret) { 362 /* Already unlocks if successful */ 363 priv->channel = ch; 364 ret = 0; 365 } else { 366 ret = -ETIMEDOUT; 367 } 368 } else { 369 /* Unlock if switch channel fails */ 370 wsm_unlock_tx(priv); 371 } 372 } 373 } 374 375 if (changed & IEEE80211_CONF_CHANGE_PS) { 376 if (!(conf->flags & IEEE80211_CONF_PS)) 377 priv->powersave_mode.mode = WSM_PSM_ACTIVE; 378 else if (conf->dynamic_ps_timeout <= 0) 379 priv->powersave_mode.mode = WSM_PSM_PS; 380 else 381 priv->powersave_mode.mode = WSM_PSM_FAST_PS; 382 383 /* Firmware requires that value for this 1-byte field must 384 * be specified in units of 500us. Values above the 128ms 385 * threshold are not supported. 386 */ 387 if (conf->dynamic_ps_timeout >= 0x80) 388 priv->powersave_mode.fast_psm_idle_period = 0xFF; 389 else 390 priv->powersave_mode.fast_psm_idle_period = 391 conf->dynamic_ps_timeout << 1; 392 393 if (priv->join_status == CW1200_JOIN_STATUS_STA && 394 priv->bss_params.aid) 395 cw1200_set_pm(priv, &priv->powersave_mode); 396 } 397 398 if (changed & IEEE80211_CONF_CHANGE_MONITOR) { 399 /* TBD: It looks like it's transparent 400 * there's a monitor interface present -- use this 401 * to determine for example whether to calculate 402 * timestamps for packets or not, do not use instead 403 * of filter flags! 404 */ 405 } 406 407 if (changed & IEEE80211_CONF_CHANGE_IDLE) { 408 struct wsm_operational_mode mode = { 409 .power_mode = cw1200_power_mode, 410 .disable_more_flag_usage = true, 411 }; 412 413 wsm_lock_tx(priv); 414 /* Disable p2p-dev mode forced by TX request */ 415 if ((priv->join_status == CW1200_JOIN_STATUS_MONITOR) && 416 (conf->flags & IEEE80211_CONF_IDLE) && 417 !priv->listening) { 418 cw1200_disable_listening(priv); 419 priv->join_status = CW1200_JOIN_STATUS_PASSIVE; 420 } 421 wsm_set_operational_mode(priv, &mode); 422 wsm_unlock_tx(priv); 423 } 424 425 if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS) { 426 pr_debug("[STA] Retry limits: %d (long), %d (short).\n", 427 conf->long_frame_max_tx_count, 428 conf->short_frame_max_tx_count); 429 spin_lock_bh(&priv->tx_policy_cache.lock); 430 priv->long_frame_max_tx_count = conf->long_frame_max_tx_count; 431 priv->short_frame_max_tx_count = 432 (conf->short_frame_max_tx_count < 0x0F) ? 433 conf->short_frame_max_tx_count : 0x0F; 434 priv->hw->max_rate_tries = priv->short_frame_max_tx_count; 435 spin_unlock_bh(&priv->tx_policy_cache.lock); 436 } 437 mutex_unlock(&priv->conf_mutex); 438 up(&priv->scan.lock); 439 return ret; 440 } 441 442 void cw1200_update_filtering(struct cw1200_common *priv) 443 { 444 int ret; 445 bool bssid_filtering = !priv->rx_filter.bssid; 446 bool is_p2p = priv->vif && priv->vif->p2p; 447 bool is_sta = priv->vif && NL80211_IFTYPE_STATION == priv->vif->type; 448 449 static struct wsm_beacon_filter_control bf_ctrl; 450 static struct wsm_mib_beacon_filter_table bf_tbl = { 451 .entry[0].ie_id = WLAN_EID_VENDOR_SPECIFIC, 452 .entry[0].flags = WSM_BEACON_FILTER_IE_HAS_CHANGED | 453 WSM_BEACON_FILTER_IE_NO_LONGER_PRESENT | 454 WSM_BEACON_FILTER_IE_HAS_APPEARED, 455 .entry[0].oui[0] = 0x50, 456 .entry[0].oui[1] = 0x6F, 457 .entry[0].oui[2] = 0x9A, 458 .entry[1].ie_id = WLAN_EID_HT_OPERATION, 459 .entry[1].flags = WSM_BEACON_FILTER_IE_HAS_CHANGED | 460 WSM_BEACON_FILTER_IE_NO_LONGER_PRESENT | 461 WSM_BEACON_FILTER_IE_HAS_APPEARED, 462 .entry[2].ie_id = WLAN_EID_ERP_INFO, 463 .entry[2].flags = WSM_BEACON_FILTER_IE_HAS_CHANGED | 464 WSM_BEACON_FILTER_IE_NO_LONGER_PRESENT | 465 WSM_BEACON_FILTER_IE_HAS_APPEARED, 466 }; 467 468 if (priv->join_status == CW1200_JOIN_STATUS_PASSIVE) 469 return; 470 else if (priv->join_status == CW1200_JOIN_STATUS_MONITOR) 471 bssid_filtering = false; 472 473 if (priv->disable_beacon_filter) { 474 bf_ctrl.enabled = 0; 475 bf_ctrl.bcn_count = 1; 476 bf_tbl.num = __cpu_to_le32(0); 477 } else if (is_p2p || !is_sta) { 478 bf_ctrl.enabled = WSM_BEACON_FILTER_ENABLE | 479 WSM_BEACON_FILTER_AUTO_ERP; 480 bf_ctrl.bcn_count = 0; 481 bf_tbl.num = __cpu_to_le32(2); 482 } else { 483 bf_ctrl.enabled = WSM_BEACON_FILTER_ENABLE; 484 bf_ctrl.bcn_count = 0; 485 bf_tbl.num = __cpu_to_le32(3); 486 } 487 488 /* When acting as p2p client being connected to p2p GO, in order to 489 * receive frames from a different p2p device, turn off bssid filter. 490 * 491 * WARNING: FW dependency! 492 * This can only be used with FW WSM371 and its successors. 493 * In that FW version even with bssid filter turned off, 494 * device will block most of the unwanted frames. 495 */ 496 if (is_p2p) 497 bssid_filtering = false; 498 499 ret = wsm_set_rx_filter(priv, &priv->rx_filter); 500 if (!ret) 501 ret = wsm_set_beacon_filter_table(priv, &bf_tbl); 502 if (!ret) 503 ret = wsm_beacon_filter_control(priv, &bf_ctrl); 504 if (!ret) 505 ret = wsm_set_bssid_filtering(priv, bssid_filtering); 506 if (!ret) 507 ret = wsm_set_multicast_filter(priv, &priv->multicast_filter); 508 if (ret) 509 wiphy_err(priv->hw->wiphy, 510 "Update filtering failed: %d.\n", ret); 511 return; 512 } 513 514 void cw1200_update_filtering_work(struct work_struct *work) 515 { 516 struct cw1200_common *priv = 517 container_of(work, struct cw1200_common, 518 update_filtering_work); 519 520 cw1200_update_filtering(priv); 521 } 522 523 void cw1200_set_beacon_wakeup_period_work(struct work_struct *work) 524 { 525 struct cw1200_common *priv = 526 container_of(work, struct cw1200_common, 527 set_beacon_wakeup_period_work); 528 529 wsm_set_beacon_wakeup_period(priv, 530 priv->beacon_int * priv->join_dtim_period > 531 MAX_BEACON_SKIP_TIME_MS ? 1 : 532 priv->join_dtim_period, 0); 533 } 534 535 u64 cw1200_prepare_multicast(struct ieee80211_hw *hw, 536 struct netdev_hw_addr_list *mc_list) 537 { 538 static u8 broadcast_ipv6[ETH_ALEN] = { 539 0x33, 0x33, 0x00, 0x00, 0x00, 0x01 540 }; 541 static u8 broadcast_ipv4[ETH_ALEN] = { 542 0x01, 0x00, 0x5e, 0x00, 0x00, 0x01 543 }; 544 struct cw1200_common *priv = hw->priv; 545 struct netdev_hw_addr *ha; 546 int count = 0; 547 548 /* Disable multicast filtering */ 549 priv->has_multicast_subscription = false; 550 memset(&priv->multicast_filter, 0x00, sizeof(priv->multicast_filter)); 551 552 if (netdev_hw_addr_list_count(mc_list) > WSM_MAX_GRP_ADDRTABLE_ENTRIES) 553 return 0; 554 555 /* Enable if requested */ 556 netdev_hw_addr_list_for_each(ha, mc_list) { 557 pr_debug("[STA] multicast: %pM\n", ha->addr); 558 memcpy(&priv->multicast_filter.macaddrs[count], 559 ha->addr, ETH_ALEN); 560 if (!ether_addr_equal(ha->addr, broadcast_ipv4) && 561 !ether_addr_equal(ha->addr, broadcast_ipv6)) 562 priv->has_multicast_subscription = true; 563 count++; 564 } 565 566 if (count) { 567 priv->multicast_filter.enable = __cpu_to_le32(1); 568 priv->multicast_filter.num_addrs = __cpu_to_le32(count); 569 } 570 571 return netdev_hw_addr_list_count(mc_list); 572 } 573 574 void cw1200_configure_filter(struct ieee80211_hw *dev, 575 unsigned int changed_flags, 576 unsigned int *total_flags, 577 u64 multicast) 578 { 579 struct cw1200_common *priv = dev->priv; 580 bool listening = !!(*total_flags & 581 (FIF_OTHER_BSS | 582 FIF_BCN_PRBRESP_PROMISC | 583 FIF_PROBE_REQ)); 584 585 *total_flags &= FIF_OTHER_BSS | 586 FIF_FCSFAIL | 587 FIF_BCN_PRBRESP_PROMISC | 588 FIF_PROBE_REQ; 589 590 down(&priv->scan.lock); 591 mutex_lock(&priv->conf_mutex); 592 593 priv->rx_filter.promiscuous = 0; 594 priv->rx_filter.bssid = (*total_flags & (FIF_OTHER_BSS | 595 FIF_PROBE_REQ)) ? 1 : 0; 596 priv->rx_filter.fcs = (*total_flags & FIF_FCSFAIL) ? 1 : 0; 597 priv->disable_beacon_filter = !(*total_flags & 598 (FIF_BCN_PRBRESP_PROMISC | 599 FIF_PROBE_REQ)); 600 if (priv->listening != listening) { 601 priv->listening = listening; 602 wsm_lock_tx(priv); 603 cw1200_update_listening(priv, listening); 604 wsm_unlock_tx(priv); 605 } 606 cw1200_update_filtering(priv); 607 mutex_unlock(&priv->conf_mutex); 608 up(&priv->scan.lock); 609 } 610 611 int cw1200_conf_tx(struct ieee80211_hw *dev, struct ieee80211_vif *vif, 612 u16 queue, const struct ieee80211_tx_queue_params *params) 613 { 614 struct cw1200_common *priv = dev->priv; 615 int ret = 0; 616 /* To prevent re-applying PM request OID again and again*/ 617 bool old_uapsd_flags; 618 619 mutex_lock(&priv->conf_mutex); 620 621 if (queue < dev->queues) { 622 old_uapsd_flags = le16_to_cpu(priv->uapsd_info.uapsd_flags); 623 624 WSM_TX_QUEUE_SET(&priv->tx_queue_params, queue, 0, 0, 0); 625 ret = wsm_set_tx_queue_params(priv, 626 &priv->tx_queue_params.params[queue], queue); 627 if (ret) { 628 ret = -EINVAL; 629 goto out; 630 } 631 632 WSM_EDCA_SET(&priv->edca, queue, params->aifs, 633 params->cw_min, params->cw_max, 634 params->txop, 0xc8, 635 params->uapsd); 636 ret = wsm_set_edca_params(priv, &priv->edca); 637 if (ret) { 638 ret = -EINVAL; 639 goto out; 640 } 641 642 if (priv->mode == NL80211_IFTYPE_STATION) { 643 ret = cw1200_set_uapsd_param(priv, &priv->edca); 644 if (!ret && priv->setbssparams_done && 645 (priv->join_status == CW1200_JOIN_STATUS_STA) && 646 (old_uapsd_flags != le16_to_cpu(priv->uapsd_info.uapsd_flags))) 647 ret = cw1200_set_pm(priv, &priv->powersave_mode); 648 } 649 } else { 650 ret = -EINVAL; 651 } 652 653 out: 654 mutex_unlock(&priv->conf_mutex); 655 return ret; 656 } 657 658 int cw1200_get_stats(struct ieee80211_hw *dev, 659 struct ieee80211_low_level_stats *stats) 660 { 661 struct cw1200_common *priv = dev->priv; 662 663 memcpy(stats, &priv->stats, sizeof(*stats)); 664 return 0; 665 } 666 667 int cw1200_set_pm(struct cw1200_common *priv, const struct wsm_set_pm *arg) 668 { 669 struct wsm_set_pm pm = *arg; 670 671 if (priv->uapsd_info.uapsd_flags != 0) 672 pm.mode &= ~WSM_PSM_FAST_PS_FLAG; 673 674 if (memcmp(&pm, &priv->firmware_ps_mode, 675 sizeof(struct wsm_set_pm))) { 676 priv->firmware_ps_mode = pm; 677 return wsm_set_pm(priv, &pm); 678 } else { 679 return 0; 680 } 681 } 682 683 int cw1200_set_key(struct ieee80211_hw *dev, enum set_key_cmd cmd, 684 struct ieee80211_vif *vif, struct ieee80211_sta *sta, 685 struct ieee80211_key_conf *key) 686 { 687 int ret = -EOPNOTSUPP; 688 struct cw1200_common *priv = dev->priv; 689 struct ieee80211_key_seq seq; 690 691 mutex_lock(&priv->conf_mutex); 692 693 if (cmd == SET_KEY) { 694 u8 *peer_addr = NULL; 695 int pairwise = (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) ? 696 1 : 0; 697 int idx = cw1200_alloc_key(priv); 698 struct wsm_add_key *wsm_key = &priv->keys[idx]; 699 700 if (idx < 0) { 701 ret = -EINVAL; 702 goto finally; 703 } 704 705 if (sta) 706 peer_addr = sta->addr; 707 708 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE | 709 IEEE80211_KEY_FLAG_RESERVE_TAILROOM; 710 711 switch (key->cipher) { 712 case WLAN_CIPHER_SUITE_WEP40: 713 case WLAN_CIPHER_SUITE_WEP104: 714 if (key->keylen > 16) { 715 cw1200_free_key(priv, idx); 716 ret = -EINVAL; 717 goto finally; 718 } 719 720 if (pairwise) { 721 wsm_key->type = WSM_KEY_TYPE_WEP_PAIRWISE; 722 memcpy(wsm_key->wep_pairwise.peer, 723 peer_addr, ETH_ALEN); 724 memcpy(wsm_key->wep_pairwise.keydata, 725 &key->key[0], key->keylen); 726 wsm_key->wep_pairwise.keylen = key->keylen; 727 } else { 728 wsm_key->type = WSM_KEY_TYPE_WEP_DEFAULT; 729 memcpy(wsm_key->wep_group.keydata, 730 &key->key[0], key->keylen); 731 wsm_key->wep_group.keylen = key->keylen; 732 wsm_key->wep_group.keyid = key->keyidx; 733 } 734 break; 735 case WLAN_CIPHER_SUITE_TKIP: 736 ieee80211_get_key_rx_seq(key, 0, &seq); 737 if (pairwise) { 738 wsm_key->type = WSM_KEY_TYPE_TKIP_PAIRWISE; 739 memcpy(wsm_key->tkip_pairwise.peer, 740 peer_addr, ETH_ALEN); 741 memcpy(wsm_key->tkip_pairwise.keydata, 742 &key->key[0], 16); 743 memcpy(wsm_key->tkip_pairwise.tx_mic_key, 744 &key->key[16], 8); 745 memcpy(wsm_key->tkip_pairwise.rx_mic_key, 746 &key->key[24], 8); 747 } else { 748 size_t mic_offset = 749 (priv->mode == NL80211_IFTYPE_AP) ? 750 16 : 24; 751 wsm_key->type = WSM_KEY_TYPE_TKIP_GROUP; 752 memcpy(wsm_key->tkip_group.keydata, 753 &key->key[0], 16); 754 memcpy(wsm_key->tkip_group.rx_mic_key, 755 &key->key[mic_offset], 8); 756 757 wsm_key->tkip_group.rx_seqnum[0] = seq.tkip.iv16 & 0xff; 758 wsm_key->tkip_group.rx_seqnum[1] = (seq.tkip.iv16 >> 8) & 0xff; 759 wsm_key->tkip_group.rx_seqnum[2] = seq.tkip.iv32 & 0xff; 760 wsm_key->tkip_group.rx_seqnum[3] = (seq.tkip.iv32 >> 8) & 0xff; 761 wsm_key->tkip_group.rx_seqnum[4] = (seq.tkip.iv32 >> 16) & 0xff; 762 wsm_key->tkip_group.rx_seqnum[5] = (seq.tkip.iv32 >> 24) & 0xff; 763 wsm_key->tkip_group.rx_seqnum[6] = 0; 764 wsm_key->tkip_group.rx_seqnum[7] = 0; 765 766 wsm_key->tkip_group.keyid = key->keyidx; 767 } 768 break; 769 case WLAN_CIPHER_SUITE_CCMP: 770 ieee80211_get_key_rx_seq(key, 0, &seq); 771 if (pairwise) { 772 wsm_key->type = WSM_KEY_TYPE_AES_PAIRWISE; 773 memcpy(wsm_key->aes_pairwise.peer, 774 peer_addr, ETH_ALEN); 775 memcpy(wsm_key->aes_pairwise.keydata, 776 &key->key[0], 16); 777 } else { 778 wsm_key->type = WSM_KEY_TYPE_AES_GROUP; 779 memcpy(wsm_key->aes_group.keydata, 780 &key->key[0], 16); 781 782 wsm_key->aes_group.rx_seqnum[0] = seq.ccmp.pn[5]; 783 wsm_key->aes_group.rx_seqnum[1] = seq.ccmp.pn[4]; 784 wsm_key->aes_group.rx_seqnum[2] = seq.ccmp.pn[3]; 785 wsm_key->aes_group.rx_seqnum[3] = seq.ccmp.pn[2]; 786 wsm_key->aes_group.rx_seqnum[4] = seq.ccmp.pn[1]; 787 wsm_key->aes_group.rx_seqnum[5] = seq.ccmp.pn[0]; 788 wsm_key->aes_group.rx_seqnum[6] = 0; 789 wsm_key->aes_group.rx_seqnum[7] = 0; 790 wsm_key->aes_group.keyid = key->keyidx; 791 } 792 break; 793 case WLAN_CIPHER_SUITE_SMS4: 794 if (pairwise) { 795 wsm_key->type = WSM_KEY_TYPE_WAPI_PAIRWISE; 796 memcpy(wsm_key->wapi_pairwise.peer, 797 peer_addr, ETH_ALEN); 798 memcpy(wsm_key->wapi_pairwise.keydata, 799 &key->key[0], 16); 800 memcpy(wsm_key->wapi_pairwise.mic_key, 801 &key->key[16], 16); 802 wsm_key->wapi_pairwise.keyid = key->keyidx; 803 } else { 804 wsm_key->type = WSM_KEY_TYPE_WAPI_GROUP; 805 memcpy(wsm_key->wapi_group.keydata, 806 &key->key[0], 16); 807 memcpy(wsm_key->wapi_group.mic_key, 808 &key->key[16], 16); 809 wsm_key->wapi_group.keyid = key->keyidx; 810 } 811 break; 812 default: 813 pr_warn("Unhandled key type %d\n", key->cipher); 814 cw1200_free_key(priv, idx); 815 ret = -EOPNOTSUPP; 816 goto finally; 817 } 818 ret = wsm_add_key(priv, wsm_key); 819 if (!ret) 820 key->hw_key_idx = idx; 821 else 822 cw1200_free_key(priv, idx); 823 } else if (cmd == DISABLE_KEY) { 824 struct wsm_remove_key wsm_key = { 825 .index = key->hw_key_idx, 826 }; 827 828 if (wsm_key.index > WSM_KEY_MAX_INDEX) { 829 ret = -EINVAL; 830 goto finally; 831 } 832 833 cw1200_free_key(priv, wsm_key.index); 834 ret = wsm_remove_key(priv, &wsm_key); 835 } else { 836 pr_warn("Unhandled key command %d\n", cmd); 837 } 838 839 finally: 840 mutex_unlock(&priv->conf_mutex); 841 return ret; 842 } 843 844 void cw1200_wep_key_work(struct work_struct *work) 845 { 846 struct cw1200_common *priv = 847 container_of(work, struct cw1200_common, wep_key_work); 848 u8 queue_id = cw1200_queue_get_queue_id(priv->pending_frame_id); 849 struct cw1200_queue *queue = &priv->tx_queue[queue_id]; 850 __le32 wep_default_key_id = __cpu_to_le32( 851 priv->wep_default_key_id); 852 853 pr_debug("[STA] Setting default WEP key: %d\n", 854 priv->wep_default_key_id); 855 wsm_flush_tx(priv); 856 wsm_write_mib(priv, WSM_MIB_ID_DOT11_WEP_DEFAULT_KEY_ID, 857 &wep_default_key_id, sizeof(wep_default_key_id)); 858 cw1200_queue_requeue(queue, priv->pending_frame_id); 859 wsm_unlock_tx(priv); 860 } 861 862 int cw1200_set_rts_threshold(struct ieee80211_hw *hw, u32 value) 863 { 864 int ret = 0; 865 __le32 val32; 866 struct cw1200_common *priv = hw->priv; 867 868 if (priv->mode == NL80211_IFTYPE_UNSPECIFIED) 869 return 0; 870 871 if (value != (u32) -1) 872 val32 = __cpu_to_le32(value); 873 else 874 val32 = 0; /* disabled */ 875 876 if (priv->rts_threshold == value) 877 goto out; 878 879 pr_debug("[STA] Setting RTS threshold: %d\n", 880 priv->rts_threshold); 881 882 /* mutex_lock(&priv->conf_mutex); */ 883 ret = wsm_write_mib(priv, WSM_MIB_ID_DOT11_RTS_THRESHOLD, 884 &val32, sizeof(val32)); 885 if (!ret) 886 priv->rts_threshold = value; 887 /* mutex_unlock(&priv->conf_mutex); */ 888 889 out: 890 return ret; 891 } 892 893 /* If successful, LOCKS the TX queue! */ 894 static int __cw1200_flush(struct cw1200_common *priv, bool drop) 895 { 896 int i, ret; 897 898 for (;;) { 899 /* TODO: correct flush handling is required when dev_stop. 900 * Temporary workaround: 2s 901 */ 902 if (drop) { 903 for (i = 0; i < 4; ++i) 904 cw1200_queue_clear(&priv->tx_queue[i]); 905 } else { 906 ret = wait_event_timeout( 907 priv->tx_queue_stats.wait_link_id_empty, 908 cw1200_queue_stats_is_empty( 909 &priv->tx_queue_stats, -1), 910 2 * HZ); 911 } 912 913 if (!drop && ret <= 0) { 914 ret = -ETIMEDOUT; 915 break; 916 } else { 917 ret = 0; 918 } 919 920 wsm_lock_tx(priv); 921 if (!cw1200_queue_stats_is_empty(&priv->tx_queue_stats, -1)) { 922 /* Highly unlikely: WSM requeued frames. */ 923 wsm_unlock_tx(priv); 924 continue; 925 } 926 break; 927 } 928 return ret; 929 } 930 931 void cw1200_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 932 u32 queues, bool drop) 933 { 934 struct cw1200_common *priv = hw->priv; 935 936 switch (priv->mode) { 937 case NL80211_IFTYPE_MONITOR: 938 drop = true; 939 break; 940 case NL80211_IFTYPE_AP: 941 if (!priv->enable_beacon) 942 drop = true; 943 break; 944 } 945 946 if (!__cw1200_flush(priv, drop)) 947 wsm_unlock_tx(priv); 948 949 return; 950 } 951 952 /* ******************************************************************** */ 953 /* WSM callbacks */ 954 955 void cw1200_free_event_queue(struct cw1200_common *priv) 956 { 957 LIST_HEAD(list); 958 959 spin_lock(&priv->event_queue_lock); 960 list_splice_init(&priv->event_queue, &list); 961 spin_unlock(&priv->event_queue_lock); 962 963 __cw1200_free_event_queue(&list); 964 } 965 966 void cw1200_event_handler(struct work_struct *work) 967 { 968 struct cw1200_common *priv = 969 container_of(work, struct cw1200_common, event_handler); 970 struct cw1200_wsm_event *event; 971 LIST_HEAD(list); 972 973 spin_lock(&priv->event_queue_lock); 974 list_splice_init(&priv->event_queue, &list); 975 spin_unlock(&priv->event_queue_lock); 976 977 list_for_each_entry(event, &list, link) { 978 switch (event->evt.id) { 979 case WSM_EVENT_ERROR: 980 pr_err("Unhandled WSM Error from LMAC\n"); 981 break; 982 case WSM_EVENT_BSS_LOST: 983 pr_debug("[CQM] BSS lost.\n"); 984 cancel_work_sync(&priv->unjoin_work); 985 if (!down_trylock(&priv->scan.lock)) { 986 cw1200_cqm_bssloss_sm(priv, 1, 0, 0); 987 up(&priv->scan.lock); 988 } else { 989 /* Scan is in progress. Delay reporting. 990 * Scan complete will trigger bss_loss_work 991 */ 992 priv->delayed_link_loss = 1; 993 /* Also start a watchdog. */ 994 queue_delayed_work(priv->workqueue, 995 &priv->bss_loss_work, 5*HZ); 996 } 997 break; 998 case WSM_EVENT_BSS_REGAINED: 999 pr_debug("[CQM] BSS regained.\n"); 1000 cw1200_cqm_bssloss_sm(priv, 0, 0, 0); 1001 cancel_work_sync(&priv->unjoin_work); 1002 break; 1003 case WSM_EVENT_RADAR_DETECTED: 1004 wiphy_info(priv->hw->wiphy, "radar pulse detected\n"); 1005 break; 1006 case WSM_EVENT_RCPI_RSSI: 1007 { 1008 /* RSSI: signed Q8.0, RCPI: unsigned Q7.1 1009 * RSSI = RCPI / 2 - 110 1010 */ 1011 int rcpi_rssi = (int)(event->evt.data & 0xFF); 1012 int cqm_evt; 1013 if (priv->cqm_use_rssi) 1014 rcpi_rssi = (s8)rcpi_rssi; 1015 else 1016 rcpi_rssi = rcpi_rssi / 2 - 110; 1017 1018 cqm_evt = (rcpi_rssi <= priv->cqm_rssi_thold) ? 1019 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW : 1020 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH; 1021 pr_debug("[CQM] RSSI event: %d.\n", rcpi_rssi); 1022 ieee80211_cqm_rssi_notify(priv->vif, cqm_evt, 1023 GFP_KERNEL); 1024 break; 1025 } 1026 case WSM_EVENT_BT_INACTIVE: 1027 pr_warn("Unhandled BT INACTIVE from LMAC\n"); 1028 break; 1029 case WSM_EVENT_BT_ACTIVE: 1030 pr_warn("Unhandled BT ACTIVE from LMAC\n"); 1031 break; 1032 } 1033 } 1034 __cw1200_free_event_queue(&list); 1035 } 1036 1037 void cw1200_bss_loss_work(struct work_struct *work) 1038 { 1039 struct cw1200_common *priv = 1040 container_of(work, struct cw1200_common, bss_loss_work.work); 1041 1042 pr_debug("[CQM] Reporting connection loss.\n"); 1043 wsm_lock_tx(priv); 1044 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0) 1045 wsm_unlock_tx(priv); 1046 } 1047 1048 void cw1200_bss_params_work(struct work_struct *work) 1049 { 1050 struct cw1200_common *priv = 1051 container_of(work, struct cw1200_common, bss_params_work); 1052 mutex_lock(&priv->conf_mutex); 1053 1054 priv->bss_params.reset_beacon_loss = 1; 1055 wsm_set_bss_params(priv, &priv->bss_params); 1056 priv->bss_params.reset_beacon_loss = 0; 1057 1058 mutex_unlock(&priv->conf_mutex); 1059 } 1060 1061 /* ******************************************************************** */ 1062 /* Internal API */ 1063 1064 /* This function is called to Parse the SDD file 1065 * to extract listen_interval and PTA related information 1066 * sdd is a TLV: u8 id, u8 len, u8 data[] 1067 */ 1068 static int cw1200_parse_sdd_file(struct cw1200_common *priv) 1069 { 1070 const u8 *p = priv->sdd->data; 1071 int ret = 0; 1072 1073 while (p + 2 <= priv->sdd->data + priv->sdd->size) { 1074 if (p + p[1] + 2 > priv->sdd->data + priv->sdd->size) { 1075 pr_warn("Malformed sdd structure\n"); 1076 return -1; 1077 } 1078 switch (p[0]) { 1079 case SDD_PTA_CFG_ELT_ID: { 1080 u16 v; 1081 if (p[1] < 4) { 1082 pr_warn("SDD_PTA_CFG_ELT_ID malformed\n"); 1083 ret = -1; 1084 break; 1085 } 1086 v = le16_to_cpu(*((__le16 *)(p + 2))); 1087 if (!v) /* non-zero means this is enabled */ 1088 break; 1089 1090 v = le16_to_cpu(*((__le16 *)(p + 4))); 1091 priv->conf_listen_interval = (v >> 7) & 0x1F; 1092 pr_debug("PTA found; Listen Interval %d\n", 1093 priv->conf_listen_interval); 1094 break; 1095 } 1096 case SDD_REFERENCE_FREQUENCY_ELT_ID: { 1097 u16 clk = le16_to_cpu(*((__le16 *)(p + 2))); 1098 if (clk != priv->hw_refclk) 1099 pr_warn("SDD file doesn't match configured refclk (%d vs %d)\n", 1100 clk, priv->hw_refclk); 1101 break; 1102 } 1103 default: 1104 break; 1105 } 1106 p += p[1] + 2; 1107 } 1108 1109 if (!priv->bt_present) { 1110 pr_debug("PTA element NOT found.\n"); 1111 priv->conf_listen_interval = 0; 1112 } 1113 return ret; 1114 } 1115 1116 int cw1200_setup_mac(struct cw1200_common *priv) 1117 { 1118 int ret = 0; 1119 1120 /* NOTE: There is a bug in FW: it reports signal 1121 * as RSSI if RSSI subscription is enabled. 1122 * It's not enough to set WSM_RCPI_RSSI_USE_RSSI. 1123 * 1124 * NOTE2: RSSI based reports have been switched to RCPI, since 1125 * FW has a bug and RSSI reported values are not stable, 1126 * what can leads to signal level oscilations in user-end applications 1127 */ 1128 struct wsm_rcpi_rssi_threshold threshold = { 1129 .rssiRcpiMode = WSM_RCPI_RSSI_THRESHOLD_ENABLE | 1130 WSM_RCPI_RSSI_DONT_USE_UPPER | 1131 WSM_RCPI_RSSI_DONT_USE_LOWER, 1132 .rollingAverageCount = 16, 1133 }; 1134 1135 struct wsm_configuration cfg = { 1136 .dot11StationId = &priv->mac_addr[0], 1137 }; 1138 1139 /* Remember the decission here to make sure, we will handle 1140 * the RCPI/RSSI value correctly on WSM_EVENT_RCPI_RSS 1141 */ 1142 if (threshold.rssiRcpiMode & WSM_RCPI_RSSI_USE_RSSI) 1143 priv->cqm_use_rssi = true; 1144 1145 if (!priv->sdd) { 1146 ret = request_firmware(&priv->sdd, priv->sdd_path, priv->pdev); 1147 if (ret) { 1148 pr_err("Can't load sdd file %s.\n", priv->sdd_path); 1149 return ret; 1150 } 1151 cw1200_parse_sdd_file(priv); 1152 } 1153 1154 cfg.dpdData = priv->sdd->data; 1155 cfg.dpdData_size = priv->sdd->size; 1156 ret = wsm_configuration(priv, &cfg); 1157 if (ret) 1158 return ret; 1159 1160 /* Configure RSSI/SCPI reporting as RSSI. */ 1161 wsm_set_rcpi_rssi_threshold(priv, &threshold); 1162 1163 return 0; 1164 } 1165 1166 static void cw1200_join_complete(struct cw1200_common *priv) 1167 { 1168 pr_debug("[STA] Join complete (%d)\n", priv->join_complete_status); 1169 1170 priv->join_pending = false; 1171 if (priv->join_complete_status) { 1172 priv->join_status = CW1200_JOIN_STATUS_PASSIVE; 1173 cw1200_update_listening(priv, priv->listening); 1174 cw1200_do_unjoin(priv); 1175 ieee80211_connection_loss(priv->vif); 1176 } else { 1177 if (priv->mode == NL80211_IFTYPE_ADHOC) 1178 priv->join_status = CW1200_JOIN_STATUS_IBSS; 1179 else 1180 priv->join_status = CW1200_JOIN_STATUS_PRE_STA; 1181 } 1182 wsm_unlock_tx(priv); /* Clearing the lock held before do_join() */ 1183 } 1184 1185 void cw1200_join_complete_work(struct work_struct *work) 1186 { 1187 struct cw1200_common *priv = 1188 container_of(work, struct cw1200_common, join_complete_work); 1189 mutex_lock(&priv->conf_mutex); 1190 cw1200_join_complete(priv); 1191 mutex_unlock(&priv->conf_mutex); 1192 } 1193 1194 void cw1200_join_complete_cb(struct cw1200_common *priv, 1195 struct wsm_join_complete *arg) 1196 { 1197 pr_debug("[STA] cw1200_join_complete_cb called, status=%d.\n", 1198 arg->status); 1199 1200 if (cancel_delayed_work(&priv->join_timeout)) { 1201 priv->join_complete_status = arg->status; 1202 queue_work(priv->workqueue, &priv->join_complete_work); 1203 } 1204 } 1205 1206 /* MUST be called with tx_lock held! It will be unlocked for us. */ 1207 static void cw1200_do_join(struct cw1200_common *priv) 1208 { 1209 const u8 *bssid; 1210 struct ieee80211_bss_conf *conf = &priv->vif->bss_conf; 1211 struct cfg80211_bss *bss = NULL; 1212 struct wsm_protected_mgmt_policy mgmt_policy; 1213 struct wsm_join join = { 1214 .mode = conf->ibss_joined ? 1215 WSM_JOIN_MODE_IBSS : WSM_JOIN_MODE_BSS, 1216 .preamble_type = WSM_JOIN_PREAMBLE_LONG, 1217 .probe_for_join = 1, 1218 .atim_window = 0, 1219 .basic_rate_set = cw1200_rate_mask_to_wsm(priv, 1220 conf->basic_rates), 1221 }; 1222 if (delayed_work_pending(&priv->join_timeout)) { 1223 pr_warn("[STA] - Join request already pending, skipping..\n"); 1224 wsm_unlock_tx(priv); 1225 return; 1226 } 1227 1228 if (priv->join_status) 1229 cw1200_do_unjoin(priv); 1230 1231 bssid = priv->vif->bss_conf.bssid; 1232 1233 bss = cfg80211_get_bss(priv->hw->wiphy, priv->channel, bssid, NULL, 0, 1234 IEEE80211_BSS_TYPE_ANY, IEEE80211_PRIVACY_ANY); 1235 1236 if (!bss && !conf->ibss_joined) { 1237 wsm_unlock_tx(priv); 1238 return; 1239 } 1240 1241 mutex_lock(&priv->conf_mutex); 1242 1243 /* Under the conf lock: check scan status and 1244 * bail out if it is in progress. 1245 */ 1246 if (atomic_read(&priv->scan.in_progress)) { 1247 wsm_unlock_tx(priv); 1248 goto done_put; 1249 } 1250 1251 priv->join_pending = true; 1252 1253 /* Sanity check basic rates */ 1254 if (!join.basic_rate_set) 1255 join.basic_rate_set = 7; 1256 1257 /* Sanity check beacon interval */ 1258 if (!priv->beacon_int) 1259 priv->beacon_int = 1; 1260 1261 join.beacon_interval = priv->beacon_int; 1262 1263 /* BT Coex related changes */ 1264 if (priv->bt_present) { 1265 if (((priv->conf_listen_interval * 100) % 1266 priv->beacon_int) == 0) 1267 priv->listen_interval = 1268 ((priv->conf_listen_interval * 100) / 1269 priv->beacon_int); 1270 else 1271 priv->listen_interval = 1272 ((priv->conf_listen_interval * 100) / 1273 priv->beacon_int + 1); 1274 } 1275 1276 if (priv->hw->conf.ps_dtim_period) 1277 priv->join_dtim_period = priv->hw->conf.ps_dtim_period; 1278 join.dtim_period = priv->join_dtim_period; 1279 1280 join.channel_number = priv->channel->hw_value; 1281 join.band = (priv->channel->band == NL80211_BAND_5GHZ) ? 1282 WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G; 1283 1284 memcpy(join.bssid, bssid, sizeof(join.bssid)); 1285 1286 pr_debug("[STA] Join BSSID: %pM DTIM: %d, interval: %d\n", 1287 join.bssid, 1288 join.dtim_period, priv->beacon_int); 1289 1290 if (!conf->ibss_joined) { 1291 const u8 *ssidie; 1292 rcu_read_lock(); 1293 ssidie = ieee80211_bss_get_ie(bss, WLAN_EID_SSID); 1294 if (ssidie) { 1295 join.ssid_len = ssidie[1]; 1296 memcpy(join.ssid, &ssidie[2], join.ssid_len); 1297 } 1298 rcu_read_unlock(); 1299 } 1300 1301 if (priv->vif->p2p) { 1302 join.flags |= WSM_JOIN_FLAGS_P2P_GO; 1303 join.basic_rate_set = 1304 cw1200_rate_mask_to_wsm(priv, 0xFF0); 1305 } 1306 1307 /* Enable asynchronous join calls */ 1308 if (!conf->ibss_joined) { 1309 join.flags |= WSM_JOIN_FLAGS_FORCE; 1310 join.flags |= WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND; 1311 } 1312 1313 wsm_flush_tx(priv); 1314 1315 /* Stay Awake for Join and Auth Timeouts and a bit more */ 1316 cw1200_pm_stay_awake(&priv->pm_state, 1317 CW1200_JOIN_TIMEOUT + CW1200_AUTH_TIMEOUT); 1318 1319 cw1200_update_listening(priv, false); 1320 1321 /* Turn on Block ACKs */ 1322 wsm_set_block_ack_policy(priv, priv->ba_tx_tid_mask, 1323 priv->ba_rx_tid_mask); 1324 1325 /* Set up timeout */ 1326 if (join.flags & WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND) { 1327 priv->join_status = CW1200_JOIN_STATUS_JOINING; 1328 queue_delayed_work(priv->workqueue, 1329 &priv->join_timeout, 1330 CW1200_JOIN_TIMEOUT); 1331 } 1332 1333 /* 802.11w protected mgmt frames */ 1334 mgmt_policy.protectedMgmtEnable = 0; 1335 mgmt_policy.unprotectedMgmtFramesAllowed = 1; 1336 mgmt_policy.encryptionForAuthFrame = 1; 1337 wsm_set_protected_mgmt_policy(priv, &mgmt_policy); 1338 1339 /* Perform actual join */ 1340 if (wsm_join(priv, &join)) { 1341 pr_err("[STA] cw1200_join_work: wsm_join failed!\n"); 1342 cancel_delayed_work_sync(&priv->join_timeout); 1343 cw1200_update_listening(priv, priv->listening); 1344 /* Tx lock still held, unjoin will clear it. */ 1345 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0) 1346 wsm_unlock_tx(priv); 1347 } else { 1348 if (!(join.flags & WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND)) 1349 cw1200_join_complete(priv); /* Will clear tx_lock */ 1350 1351 /* Upload keys */ 1352 cw1200_upload_keys(priv); 1353 1354 /* Due to beacon filtering it is possible that the 1355 * AP's beacon is not known for the mac80211 stack. 1356 * Disable filtering temporary to make sure the stack 1357 * receives at least one 1358 */ 1359 priv->disable_beacon_filter = true; 1360 } 1361 cw1200_update_filtering(priv); 1362 1363 done_put: 1364 mutex_unlock(&priv->conf_mutex); 1365 if (bss) 1366 cfg80211_put_bss(priv->hw->wiphy, bss); 1367 } 1368 1369 void cw1200_join_timeout(struct work_struct *work) 1370 { 1371 struct cw1200_common *priv = 1372 container_of(work, struct cw1200_common, join_timeout.work); 1373 pr_debug("[WSM] Join timed out.\n"); 1374 wsm_lock_tx(priv); 1375 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0) 1376 wsm_unlock_tx(priv); 1377 } 1378 1379 static void cw1200_do_unjoin(struct cw1200_common *priv) 1380 { 1381 struct wsm_reset reset = { 1382 .reset_statistics = true, 1383 }; 1384 1385 cancel_delayed_work_sync(&priv->join_timeout); 1386 1387 mutex_lock(&priv->conf_mutex); 1388 priv->join_pending = false; 1389 1390 if (atomic_read(&priv->scan.in_progress)) { 1391 if (priv->delayed_unjoin) 1392 wiphy_dbg(priv->hw->wiphy, "Delayed unjoin is already scheduled.\n"); 1393 else 1394 priv->delayed_unjoin = true; 1395 goto done; 1396 } 1397 1398 priv->delayed_link_loss = false; 1399 1400 if (!priv->join_status) 1401 goto done; 1402 1403 if (priv->join_status == CW1200_JOIN_STATUS_AP) 1404 goto done; 1405 1406 cancel_work_sync(&priv->update_filtering_work); 1407 cancel_work_sync(&priv->set_beacon_wakeup_period_work); 1408 priv->join_status = CW1200_JOIN_STATUS_PASSIVE; 1409 1410 /* Unjoin is a reset. */ 1411 wsm_flush_tx(priv); 1412 wsm_keep_alive_period(priv, 0); 1413 wsm_reset(priv, &reset); 1414 wsm_set_output_power(priv, priv->output_power * 10); 1415 priv->join_dtim_period = 0; 1416 cw1200_setup_mac(priv); 1417 cw1200_free_event_queue(priv); 1418 cancel_work_sync(&priv->event_handler); 1419 cw1200_update_listening(priv, priv->listening); 1420 cw1200_cqm_bssloss_sm(priv, 0, 0, 0); 1421 1422 /* Disable Block ACKs */ 1423 wsm_set_block_ack_policy(priv, 0, 0); 1424 1425 priv->disable_beacon_filter = false; 1426 cw1200_update_filtering(priv); 1427 memset(&priv->association_mode, 0, 1428 sizeof(priv->association_mode)); 1429 memset(&priv->bss_params, 0, sizeof(priv->bss_params)); 1430 priv->setbssparams_done = false; 1431 memset(&priv->firmware_ps_mode, 0, 1432 sizeof(priv->firmware_ps_mode)); 1433 1434 pr_debug("[STA] Unjoin completed.\n"); 1435 1436 done: 1437 mutex_unlock(&priv->conf_mutex); 1438 } 1439 1440 void cw1200_unjoin_work(struct work_struct *work) 1441 { 1442 struct cw1200_common *priv = 1443 container_of(work, struct cw1200_common, unjoin_work); 1444 1445 cw1200_do_unjoin(priv); 1446 1447 /* Tell the stack we're dead */ 1448 ieee80211_connection_loss(priv->vif); 1449 1450 wsm_unlock_tx(priv); 1451 } 1452 1453 int cw1200_enable_listening(struct cw1200_common *priv) 1454 { 1455 struct wsm_start start = { 1456 .mode = WSM_START_MODE_P2P_DEV, 1457 .band = WSM_PHY_BAND_2_4G, 1458 .beacon_interval = 100, 1459 .dtim_period = 1, 1460 .probe_delay = 0, 1461 .basic_rate_set = 0x0F, 1462 }; 1463 1464 if (priv->channel) { 1465 start.band = priv->channel->band == NL80211_BAND_5GHZ ? 1466 WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G; 1467 start.channel_number = priv->channel->hw_value; 1468 } else { 1469 start.band = WSM_PHY_BAND_2_4G; 1470 start.channel_number = 1; 1471 } 1472 1473 return wsm_start(priv, &start); 1474 } 1475 1476 int cw1200_disable_listening(struct cw1200_common *priv) 1477 { 1478 int ret; 1479 struct wsm_reset reset = { 1480 .reset_statistics = true, 1481 }; 1482 ret = wsm_reset(priv, &reset); 1483 return ret; 1484 } 1485 1486 void cw1200_update_listening(struct cw1200_common *priv, bool enabled) 1487 { 1488 if (enabled) { 1489 if (priv->join_status == CW1200_JOIN_STATUS_PASSIVE) { 1490 if (!cw1200_enable_listening(priv)) 1491 priv->join_status = CW1200_JOIN_STATUS_MONITOR; 1492 wsm_set_probe_responder(priv, true); 1493 } 1494 } else { 1495 if (priv->join_status == CW1200_JOIN_STATUS_MONITOR) { 1496 if (!cw1200_disable_listening(priv)) 1497 priv->join_status = CW1200_JOIN_STATUS_PASSIVE; 1498 wsm_set_probe_responder(priv, false); 1499 } 1500 } 1501 } 1502 1503 int cw1200_set_uapsd_param(struct cw1200_common *priv, 1504 const struct wsm_edca_params *arg) 1505 { 1506 int ret; 1507 u16 uapsd_flags = 0; 1508 1509 /* Here's the mapping AC [queue, bit] 1510 * VO [0,3], VI [1, 2], BE [2, 1], BK [3, 0] 1511 */ 1512 1513 if (arg->uapsd_enable[0]) 1514 uapsd_flags |= 1 << 3; 1515 1516 if (arg->uapsd_enable[1]) 1517 uapsd_flags |= 1 << 2; 1518 1519 if (arg->uapsd_enable[2]) 1520 uapsd_flags |= 1 << 1; 1521 1522 if (arg->uapsd_enable[3]) 1523 uapsd_flags |= 1; 1524 1525 /* Currently pseudo U-APSD operation is not supported, so setting 1526 * MinAutoTriggerInterval, MaxAutoTriggerInterval and 1527 * AutoTriggerStep to 0 1528 */ 1529 1530 priv->uapsd_info.uapsd_flags = cpu_to_le16(uapsd_flags); 1531 priv->uapsd_info.min_auto_trigger_interval = 0; 1532 priv->uapsd_info.max_auto_trigger_interval = 0; 1533 priv->uapsd_info.auto_trigger_step = 0; 1534 1535 ret = wsm_set_uapsd_info(priv, &priv->uapsd_info); 1536 return ret; 1537 } 1538 1539 /* ******************************************************************** */ 1540 /* AP API */ 1541 1542 int cw1200_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1543 struct ieee80211_sta *sta) 1544 { 1545 struct cw1200_common *priv = hw->priv; 1546 struct cw1200_sta_priv *sta_priv = 1547 (struct cw1200_sta_priv *)&sta->drv_priv; 1548 struct cw1200_link_entry *entry; 1549 struct sk_buff *skb; 1550 1551 if (priv->mode != NL80211_IFTYPE_AP) 1552 return 0; 1553 1554 sta_priv->link_id = cw1200_find_link_id(priv, sta->addr); 1555 if (WARN_ON(!sta_priv->link_id)) { 1556 wiphy_info(priv->hw->wiphy, 1557 "[AP] No more link IDs available.\n"); 1558 return -ENOENT; 1559 } 1560 1561 entry = &priv->link_id_db[sta_priv->link_id - 1]; 1562 spin_lock_bh(&priv->ps_state_lock); 1563 if ((sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK) == 1564 IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK) 1565 priv->sta_asleep_mask |= BIT(sta_priv->link_id); 1566 entry->status = CW1200_LINK_HARD; 1567 while ((skb = skb_dequeue(&entry->rx_queue))) 1568 ieee80211_rx_irqsafe(priv->hw, skb); 1569 spin_unlock_bh(&priv->ps_state_lock); 1570 return 0; 1571 } 1572 1573 int cw1200_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1574 struct ieee80211_sta *sta) 1575 { 1576 struct cw1200_common *priv = hw->priv; 1577 struct cw1200_sta_priv *sta_priv = 1578 (struct cw1200_sta_priv *)&sta->drv_priv; 1579 struct cw1200_link_entry *entry; 1580 1581 if (priv->mode != NL80211_IFTYPE_AP || !sta_priv->link_id) 1582 return 0; 1583 1584 entry = &priv->link_id_db[sta_priv->link_id - 1]; 1585 spin_lock_bh(&priv->ps_state_lock); 1586 entry->status = CW1200_LINK_RESERVE; 1587 entry->timestamp = jiffies; 1588 wsm_lock_tx_async(priv); 1589 if (queue_work(priv->workqueue, &priv->link_id_work) <= 0) 1590 wsm_unlock_tx(priv); 1591 spin_unlock_bh(&priv->ps_state_lock); 1592 flush_workqueue(priv->workqueue); 1593 return 0; 1594 } 1595 1596 static void __cw1200_sta_notify(struct ieee80211_hw *dev, 1597 struct ieee80211_vif *vif, 1598 enum sta_notify_cmd notify_cmd, 1599 int link_id) 1600 { 1601 struct cw1200_common *priv = dev->priv; 1602 u32 bit, prev; 1603 1604 /* Zero link id means "for all link IDs" */ 1605 if (link_id) 1606 bit = BIT(link_id); 1607 else if (WARN_ON_ONCE(notify_cmd != STA_NOTIFY_AWAKE)) 1608 bit = 0; 1609 else 1610 bit = priv->link_id_map; 1611 prev = priv->sta_asleep_mask & bit; 1612 1613 switch (notify_cmd) { 1614 case STA_NOTIFY_SLEEP: 1615 if (!prev) { 1616 if (priv->buffered_multicasts && 1617 !priv->sta_asleep_mask) 1618 queue_work(priv->workqueue, 1619 &priv->multicast_start_work); 1620 priv->sta_asleep_mask |= bit; 1621 } 1622 break; 1623 case STA_NOTIFY_AWAKE: 1624 if (prev) { 1625 priv->sta_asleep_mask &= ~bit; 1626 priv->pspoll_mask &= ~bit; 1627 if (priv->tx_multicast && link_id && 1628 !priv->sta_asleep_mask) 1629 queue_work(priv->workqueue, 1630 &priv->multicast_stop_work); 1631 cw1200_bh_wakeup(priv); 1632 } 1633 break; 1634 } 1635 } 1636 1637 void cw1200_sta_notify(struct ieee80211_hw *dev, 1638 struct ieee80211_vif *vif, 1639 enum sta_notify_cmd notify_cmd, 1640 struct ieee80211_sta *sta) 1641 { 1642 struct cw1200_common *priv = dev->priv; 1643 struct cw1200_sta_priv *sta_priv = 1644 (struct cw1200_sta_priv *)&sta->drv_priv; 1645 1646 spin_lock_bh(&priv->ps_state_lock); 1647 __cw1200_sta_notify(dev, vif, notify_cmd, sta_priv->link_id); 1648 spin_unlock_bh(&priv->ps_state_lock); 1649 } 1650 1651 static void cw1200_ps_notify(struct cw1200_common *priv, 1652 int link_id, bool ps) 1653 { 1654 if (link_id > CW1200_MAX_STA_IN_AP_MODE) 1655 return; 1656 1657 pr_debug("%s for LinkId: %d. STAs asleep: %.8X\n", 1658 ps ? "Stop" : "Start", 1659 link_id, priv->sta_asleep_mask); 1660 1661 __cw1200_sta_notify(priv->hw, priv->vif, 1662 ps ? STA_NOTIFY_SLEEP : STA_NOTIFY_AWAKE, link_id); 1663 } 1664 1665 static int cw1200_set_tim_impl(struct cw1200_common *priv, bool aid0_bit_set) 1666 { 1667 struct sk_buff *skb; 1668 struct wsm_update_ie update_ie = { 1669 .what = WSM_UPDATE_IE_BEACON, 1670 .count = 1, 1671 }; 1672 u16 tim_offset, tim_length; 1673 1674 pr_debug("[AP] mcast: %s.\n", aid0_bit_set ? "ena" : "dis"); 1675 1676 skb = ieee80211_beacon_get_tim(priv->hw, priv->vif, 1677 &tim_offset, &tim_length); 1678 if (!skb) { 1679 if (!__cw1200_flush(priv, true)) 1680 wsm_unlock_tx(priv); 1681 return -ENOENT; 1682 } 1683 1684 if (tim_offset && tim_length >= 6) { 1685 /* Ignore DTIM count from mac80211: 1686 * firmware handles DTIM internally. 1687 */ 1688 skb->data[tim_offset + 2] = 0; 1689 1690 /* Set/reset aid0 bit */ 1691 if (aid0_bit_set) 1692 skb->data[tim_offset + 4] |= 1; 1693 else 1694 skb->data[tim_offset + 4] &= ~1; 1695 } 1696 1697 update_ie.ies = &skb->data[tim_offset]; 1698 update_ie.length = tim_length; 1699 wsm_update_ie(priv, &update_ie); 1700 1701 dev_kfree_skb(skb); 1702 1703 return 0; 1704 } 1705 1706 void cw1200_set_tim_work(struct work_struct *work) 1707 { 1708 struct cw1200_common *priv = 1709 container_of(work, struct cw1200_common, set_tim_work); 1710 (void)cw1200_set_tim_impl(priv, priv->aid0_bit_set); 1711 } 1712 1713 int cw1200_set_tim(struct ieee80211_hw *dev, struct ieee80211_sta *sta, 1714 bool set) 1715 { 1716 struct cw1200_common *priv = dev->priv; 1717 queue_work(priv->workqueue, &priv->set_tim_work); 1718 return 0; 1719 } 1720 1721 void cw1200_set_cts_work(struct work_struct *work) 1722 { 1723 struct cw1200_common *priv = 1724 container_of(work, struct cw1200_common, set_cts_work); 1725 1726 u8 erp_ie[3] = {WLAN_EID_ERP_INFO, 0x1, 0}; 1727 struct wsm_update_ie update_ie = { 1728 .what = WSM_UPDATE_IE_BEACON, 1729 .count = 1, 1730 .ies = erp_ie, 1731 .length = 3, 1732 }; 1733 u32 erp_info; 1734 __le32 use_cts_prot; 1735 mutex_lock(&priv->conf_mutex); 1736 erp_info = priv->erp_info; 1737 mutex_unlock(&priv->conf_mutex); 1738 use_cts_prot = 1739 erp_info & WLAN_ERP_USE_PROTECTION ? 1740 __cpu_to_le32(1) : 0; 1741 1742 erp_ie[ERP_INFO_BYTE_OFFSET] = erp_info; 1743 1744 pr_debug("[STA] ERP information 0x%x\n", erp_info); 1745 1746 wsm_write_mib(priv, WSM_MIB_ID_NON_ERP_PROTECTION, 1747 &use_cts_prot, sizeof(use_cts_prot)); 1748 wsm_update_ie(priv, &update_ie); 1749 1750 return; 1751 } 1752 1753 static int cw1200_set_btcoexinfo(struct cw1200_common *priv) 1754 { 1755 struct wsm_override_internal_txrate arg; 1756 int ret = 0; 1757 1758 if (priv->mode == NL80211_IFTYPE_STATION) { 1759 /* Plumb PSPOLL and NULL template */ 1760 cw1200_upload_pspoll(priv); 1761 cw1200_upload_null(priv); 1762 cw1200_upload_qosnull(priv); 1763 } else { 1764 return 0; 1765 } 1766 1767 memset(&arg, 0, sizeof(struct wsm_override_internal_txrate)); 1768 1769 if (!priv->vif->p2p) { 1770 /* STATION mode */ 1771 if (priv->bss_params.operational_rate_set & ~0xF) { 1772 pr_debug("[STA] STA has ERP rates\n"); 1773 /* G or BG mode */ 1774 arg.internalTxRate = (__ffs( 1775 priv->bss_params.operational_rate_set & ~0xF)); 1776 } else { 1777 pr_debug("[STA] STA has non ERP rates\n"); 1778 /* B only mode */ 1779 arg.internalTxRate = (__ffs(le32_to_cpu(priv->association_mode.basic_rate_set))); 1780 } 1781 arg.nonErpInternalTxRate = (__ffs(le32_to_cpu(priv->association_mode.basic_rate_set))); 1782 } else { 1783 /* P2P mode */ 1784 arg.internalTxRate = (__ffs(priv->bss_params.operational_rate_set & ~0xF)); 1785 arg.nonErpInternalTxRate = (__ffs(priv->bss_params.operational_rate_set & ~0xF)); 1786 } 1787 1788 pr_debug("[STA] BTCOEX_INFO MODE %d, internalTxRate : %x, nonErpInternalTxRate: %x\n", 1789 priv->mode, 1790 arg.internalTxRate, 1791 arg.nonErpInternalTxRate); 1792 1793 ret = wsm_write_mib(priv, WSM_MIB_ID_OVERRIDE_INTERNAL_TX_RATE, 1794 &arg, sizeof(arg)); 1795 1796 return ret; 1797 } 1798 1799 void cw1200_bss_info_changed(struct ieee80211_hw *dev, 1800 struct ieee80211_vif *vif, 1801 struct ieee80211_bss_conf *info, 1802 u32 changed) 1803 { 1804 struct cw1200_common *priv = dev->priv; 1805 bool do_join = false; 1806 1807 mutex_lock(&priv->conf_mutex); 1808 1809 pr_debug("BSS CHANGED: %08x\n", changed); 1810 1811 /* TODO: BSS_CHANGED_QOS */ 1812 /* TODO: BSS_CHANGED_TXPOWER */ 1813 1814 if (changed & BSS_CHANGED_ARP_FILTER) { 1815 struct wsm_mib_arp_ipv4_filter filter = {0}; 1816 int i; 1817 1818 pr_debug("[STA] BSS_CHANGED_ARP_FILTER cnt: %d\n", 1819 info->arp_addr_cnt); 1820 1821 /* Currently only one IP address is supported by firmware. 1822 * In case of more IPs arp filtering will be disabled. 1823 */ 1824 if (info->arp_addr_cnt > 0 && 1825 info->arp_addr_cnt <= WSM_MAX_ARP_IP_ADDRTABLE_ENTRIES) { 1826 for (i = 0; i < info->arp_addr_cnt; i++) { 1827 filter.ipv4addrs[i] = info->arp_addr_list[i]; 1828 pr_debug("[STA] addr[%d]: 0x%X\n", 1829 i, filter.ipv4addrs[i]); 1830 } 1831 filter.enable = __cpu_to_le32(1); 1832 } 1833 1834 pr_debug("[STA] arp ip filter enable: %d\n", 1835 __le32_to_cpu(filter.enable)); 1836 1837 wsm_set_arp_ipv4_filter(priv, &filter); 1838 } 1839 1840 if (changed & 1841 (BSS_CHANGED_BEACON | 1842 BSS_CHANGED_AP_PROBE_RESP | 1843 BSS_CHANGED_BSSID | 1844 BSS_CHANGED_SSID | 1845 BSS_CHANGED_IBSS)) { 1846 pr_debug("BSS_CHANGED_BEACON\n"); 1847 priv->beacon_int = info->beacon_int; 1848 cw1200_update_beaconing(priv); 1849 cw1200_upload_beacon(priv); 1850 } 1851 1852 if (changed & BSS_CHANGED_BEACON_ENABLED) { 1853 pr_debug("BSS_CHANGED_BEACON_ENABLED (%d)\n", info->enable_beacon); 1854 1855 if (priv->enable_beacon != info->enable_beacon) { 1856 cw1200_enable_beaconing(priv, info->enable_beacon); 1857 priv->enable_beacon = info->enable_beacon; 1858 } 1859 } 1860 1861 if (changed & BSS_CHANGED_BEACON_INT) { 1862 pr_debug("CHANGED_BEACON_INT\n"); 1863 if (info->ibss_joined) 1864 do_join = true; 1865 else if (priv->join_status == CW1200_JOIN_STATUS_AP) 1866 cw1200_update_beaconing(priv); 1867 } 1868 1869 /* assoc/disassoc, or maybe AID changed */ 1870 if (changed & BSS_CHANGED_ASSOC) { 1871 wsm_lock_tx(priv); 1872 priv->wep_default_key_id = -1; 1873 wsm_unlock_tx(priv); 1874 } 1875 1876 if (changed & BSS_CHANGED_BSSID) { 1877 pr_debug("BSS_CHANGED_BSSID\n"); 1878 do_join = true; 1879 } 1880 1881 if (changed & 1882 (BSS_CHANGED_ASSOC | 1883 BSS_CHANGED_BSSID | 1884 BSS_CHANGED_IBSS | 1885 BSS_CHANGED_BASIC_RATES | 1886 BSS_CHANGED_HT)) { 1887 pr_debug("BSS_CHANGED_ASSOC\n"); 1888 if (info->assoc) { 1889 if (priv->join_status < CW1200_JOIN_STATUS_PRE_STA) { 1890 ieee80211_connection_loss(vif); 1891 mutex_unlock(&priv->conf_mutex); 1892 return; 1893 } else if (priv->join_status == CW1200_JOIN_STATUS_PRE_STA) { 1894 priv->join_status = CW1200_JOIN_STATUS_STA; 1895 } 1896 } else { 1897 do_join = true; 1898 } 1899 1900 if (info->assoc || info->ibss_joined) { 1901 struct ieee80211_sta *sta = NULL; 1902 __le32 htprot = 0; 1903 1904 if (info->dtim_period) 1905 priv->join_dtim_period = info->dtim_period; 1906 priv->beacon_int = info->beacon_int; 1907 1908 rcu_read_lock(); 1909 1910 if (info->bssid && !info->ibss_joined) 1911 sta = ieee80211_find_sta(vif, info->bssid); 1912 if (sta) { 1913 priv->ht_info.ht_cap = sta->ht_cap; 1914 priv->bss_params.operational_rate_set = 1915 cw1200_rate_mask_to_wsm(priv, 1916 sta->supp_rates[priv->channel->band]); 1917 priv->ht_info.channel_type = cfg80211_get_chandef_type(&dev->conf.chandef); 1918 priv->ht_info.operation_mode = info->ht_operation_mode; 1919 } else { 1920 memset(&priv->ht_info, 0, 1921 sizeof(priv->ht_info)); 1922 priv->bss_params.operational_rate_set = -1; 1923 } 1924 rcu_read_unlock(); 1925 1926 /* Non Greenfield stations present */ 1927 if (priv->ht_info.operation_mode & 1928 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT) 1929 htprot |= cpu_to_le32(WSM_NON_GREENFIELD_STA_PRESENT); 1930 1931 /* Set HT protection method */ 1932 htprot |= cpu_to_le32((priv->ht_info.operation_mode & IEEE80211_HT_OP_MODE_PROTECTION) << 2); 1933 1934 /* TODO: 1935 * STBC_param.dual_cts 1936 * STBC_param.LSIG_TXOP_FILL 1937 */ 1938 1939 wsm_write_mib(priv, WSM_MIB_ID_SET_HT_PROTECTION, 1940 &htprot, sizeof(htprot)); 1941 1942 priv->association_mode.greenfield = 1943 cw1200_ht_greenfield(&priv->ht_info); 1944 priv->association_mode.flags = 1945 WSM_ASSOCIATION_MODE_SNOOP_ASSOC_FRAMES | 1946 WSM_ASSOCIATION_MODE_USE_PREAMBLE_TYPE | 1947 WSM_ASSOCIATION_MODE_USE_HT_MODE | 1948 WSM_ASSOCIATION_MODE_USE_BASIC_RATE_SET | 1949 WSM_ASSOCIATION_MODE_USE_MPDU_START_SPACING; 1950 priv->association_mode.preamble = 1951 info->use_short_preamble ? 1952 WSM_JOIN_PREAMBLE_SHORT : 1953 WSM_JOIN_PREAMBLE_LONG; 1954 priv->association_mode.basic_rate_set = __cpu_to_le32( 1955 cw1200_rate_mask_to_wsm(priv, 1956 info->basic_rates)); 1957 priv->association_mode.mpdu_start_spacing = 1958 cw1200_ht_ampdu_density(&priv->ht_info); 1959 1960 cw1200_cqm_bssloss_sm(priv, 0, 0, 0); 1961 cancel_work_sync(&priv->unjoin_work); 1962 1963 priv->bss_params.beacon_lost_count = priv->cqm_beacon_loss_count; 1964 priv->bss_params.aid = info->aid; 1965 1966 if (priv->join_dtim_period < 1) 1967 priv->join_dtim_period = 1; 1968 1969 pr_debug("[STA] DTIM %d, interval: %d\n", 1970 priv->join_dtim_period, priv->beacon_int); 1971 pr_debug("[STA] Preamble: %d, Greenfield: %d, Aid: %d, Rates: 0x%.8X, Basic: 0x%.8X\n", 1972 priv->association_mode.preamble, 1973 priv->association_mode.greenfield, 1974 priv->bss_params.aid, 1975 priv->bss_params.operational_rate_set, 1976 priv->association_mode.basic_rate_set); 1977 wsm_set_association_mode(priv, &priv->association_mode); 1978 1979 if (!info->ibss_joined) { 1980 wsm_keep_alive_period(priv, 30 /* sec */); 1981 wsm_set_bss_params(priv, &priv->bss_params); 1982 priv->setbssparams_done = true; 1983 cw1200_set_beacon_wakeup_period_work(&priv->set_beacon_wakeup_period_work); 1984 cw1200_set_pm(priv, &priv->powersave_mode); 1985 } 1986 if (priv->vif->p2p) { 1987 pr_debug("[STA] Setting p2p powersave configuration.\n"); 1988 wsm_set_p2p_ps_modeinfo(priv, 1989 &priv->p2p_ps_modeinfo); 1990 } 1991 if (priv->bt_present) 1992 cw1200_set_btcoexinfo(priv); 1993 } else { 1994 memset(&priv->association_mode, 0, 1995 sizeof(priv->association_mode)); 1996 memset(&priv->bss_params, 0, sizeof(priv->bss_params)); 1997 } 1998 } 1999 2000 /* ERP Protection */ 2001 if (changed & (BSS_CHANGED_ASSOC | 2002 BSS_CHANGED_ERP_CTS_PROT | 2003 BSS_CHANGED_ERP_PREAMBLE)) { 2004 u32 prev_erp_info = priv->erp_info; 2005 if (info->use_cts_prot) 2006 priv->erp_info |= WLAN_ERP_USE_PROTECTION; 2007 else if (!(prev_erp_info & WLAN_ERP_NON_ERP_PRESENT)) 2008 priv->erp_info &= ~WLAN_ERP_USE_PROTECTION; 2009 2010 if (info->use_short_preamble) 2011 priv->erp_info |= WLAN_ERP_BARKER_PREAMBLE; 2012 else 2013 priv->erp_info &= ~WLAN_ERP_BARKER_PREAMBLE; 2014 2015 pr_debug("[STA] ERP Protection: %x\n", priv->erp_info); 2016 2017 if (prev_erp_info != priv->erp_info) 2018 queue_work(priv->workqueue, &priv->set_cts_work); 2019 } 2020 2021 /* ERP Slottime */ 2022 if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_ERP_SLOT)) { 2023 __le32 slot_time = info->use_short_slot ? 2024 __cpu_to_le32(9) : __cpu_to_le32(20); 2025 pr_debug("[STA] Slot time: %d us.\n", 2026 __le32_to_cpu(slot_time)); 2027 wsm_write_mib(priv, WSM_MIB_ID_DOT11_SLOT_TIME, 2028 &slot_time, sizeof(slot_time)); 2029 } 2030 2031 if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_CQM)) { 2032 struct wsm_rcpi_rssi_threshold threshold = { 2033 .rollingAverageCount = 8, 2034 }; 2035 pr_debug("[CQM] RSSI threshold subscribe: %d +- %d\n", 2036 info->cqm_rssi_thold, info->cqm_rssi_hyst); 2037 priv->cqm_rssi_thold = info->cqm_rssi_thold; 2038 priv->cqm_rssi_hyst = info->cqm_rssi_hyst; 2039 2040 if (info->cqm_rssi_thold || info->cqm_rssi_hyst) { 2041 /* RSSI subscription enabled */ 2042 /* TODO: It's not a correct way of setting threshold. 2043 * Upper and lower must be set equal here and adjusted 2044 * in callback. However current implementation is much 2045 * more relaible and stable. 2046 */ 2047 2048 /* RSSI: signed Q8.0, RCPI: unsigned Q7.1 2049 * RSSI = RCPI / 2 - 110 2050 */ 2051 if (priv->cqm_use_rssi) { 2052 threshold.upperThreshold = 2053 info->cqm_rssi_thold + info->cqm_rssi_hyst; 2054 threshold.lowerThreshold = 2055 info->cqm_rssi_thold; 2056 threshold.rssiRcpiMode |= WSM_RCPI_RSSI_USE_RSSI; 2057 } else { 2058 threshold.upperThreshold = (info->cqm_rssi_thold + info->cqm_rssi_hyst + 110) * 2; 2059 threshold.lowerThreshold = (info->cqm_rssi_thold + 110) * 2; 2060 } 2061 threshold.rssiRcpiMode |= WSM_RCPI_RSSI_THRESHOLD_ENABLE; 2062 } else { 2063 /* There is a bug in FW, see sta.c. We have to enable 2064 * dummy subscription to get correct RSSI values. 2065 */ 2066 threshold.rssiRcpiMode |= 2067 WSM_RCPI_RSSI_THRESHOLD_ENABLE | 2068 WSM_RCPI_RSSI_DONT_USE_UPPER | 2069 WSM_RCPI_RSSI_DONT_USE_LOWER; 2070 if (priv->cqm_use_rssi) 2071 threshold.rssiRcpiMode |= WSM_RCPI_RSSI_USE_RSSI; 2072 } 2073 wsm_set_rcpi_rssi_threshold(priv, &threshold); 2074 } 2075 mutex_unlock(&priv->conf_mutex); 2076 2077 if (do_join) { 2078 wsm_lock_tx(priv); 2079 cw1200_do_join(priv); /* Will unlock it for us */ 2080 } 2081 } 2082 2083 void cw1200_multicast_start_work(struct work_struct *work) 2084 { 2085 struct cw1200_common *priv = 2086 container_of(work, struct cw1200_common, multicast_start_work); 2087 long tmo = priv->join_dtim_period * 2088 (priv->beacon_int + 20) * HZ / 1024; 2089 2090 cancel_work_sync(&priv->multicast_stop_work); 2091 2092 if (!priv->aid0_bit_set) { 2093 wsm_lock_tx(priv); 2094 cw1200_set_tim_impl(priv, true); 2095 priv->aid0_bit_set = true; 2096 mod_timer(&priv->mcast_timeout, jiffies + tmo); 2097 wsm_unlock_tx(priv); 2098 } 2099 } 2100 2101 void cw1200_multicast_stop_work(struct work_struct *work) 2102 { 2103 struct cw1200_common *priv = 2104 container_of(work, struct cw1200_common, multicast_stop_work); 2105 2106 if (priv->aid0_bit_set) { 2107 del_timer_sync(&priv->mcast_timeout); 2108 wsm_lock_tx(priv); 2109 priv->aid0_bit_set = false; 2110 cw1200_set_tim_impl(priv, false); 2111 wsm_unlock_tx(priv); 2112 } 2113 } 2114 2115 void cw1200_mcast_timeout(unsigned long arg) 2116 { 2117 struct cw1200_common *priv = 2118 (struct cw1200_common *)arg; 2119 2120 wiphy_warn(priv->hw->wiphy, 2121 "Multicast delivery timeout.\n"); 2122 spin_lock_bh(&priv->ps_state_lock); 2123 priv->tx_multicast = priv->aid0_bit_set && 2124 priv->buffered_multicasts; 2125 if (priv->tx_multicast) 2126 cw1200_bh_wakeup(priv); 2127 spin_unlock_bh(&priv->ps_state_lock); 2128 } 2129 2130 int cw1200_ampdu_action(struct ieee80211_hw *hw, 2131 struct ieee80211_vif *vif, 2132 struct ieee80211_ampdu_params *params) 2133 { 2134 /* Aggregation is implemented fully in firmware, 2135 * including block ack negotiation. Do not allow 2136 * mac80211 stack to do anything: it interferes with 2137 * the firmware. 2138 */ 2139 2140 /* Note that we still need this function stubbed. */ 2141 return -ENOTSUPP; 2142 } 2143 2144 /* ******************************************************************** */ 2145 /* WSM callback */ 2146 void cw1200_suspend_resume(struct cw1200_common *priv, 2147 struct wsm_suspend_resume *arg) 2148 { 2149 pr_debug("[AP] %s: %s\n", 2150 arg->stop ? "stop" : "start", 2151 arg->multicast ? "broadcast" : "unicast"); 2152 2153 if (arg->multicast) { 2154 bool cancel_tmo = false; 2155 spin_lock_bh(&priv->ps_state_lock); 2156 if (arg->stop) { 2157 priv->tx_multicast = false; 2158 } else { 2159 /* Firmware sends this indication every DTIM if there 2160 * is a STA in powersave connected. There is no reason 2161 * to suspend, following wakeup will consume much more 2162 * power than it could be saved. 2163 */ 2164 cw1200_pm_stay_awake(&priv->pm_state, 2165 priv->join_dtim_period * 2166 (priv->beacon_int + 20) * HZ / 1024); 2167 priv->tx_multicast = (priv->aid0_bit_set && 2168 priv->buffered_multicasts); 2169 if (priv->tx_multicast) { 2170 cancel_tmo = true; 2171 cw1200_bh_wakeup(priv); 2172 } 2173 } 2174 spin_unlock_bh(&priv->ps_state_lock); 2175 if (cancel_tmo) 2176 del_timer_sync(&priv->mcast_timeout); 2177 } else { 2178 spin_lock_bh(&priv->ps_state_lock); 2179 cw1200_ps_notify(priv, arg->link_id, arg->stop); 2180 spin_unlock_bh(&priv->ps_state_lock); 2181 if (!arg->stop) 2182 cw1200_bh_wakeup(priv); 2183 } 2184 return; 2185 } 2186 2187 /* ******************************************************************** */ 2188 /* AP privates */ 2189 2190 static int cw1200_upload_beacon(struct cw1200_common *priv) 2191 { 2192 int ret = 0; 2193 struct ieee80211_mgmt *mgmt; 2194 struct wsm_template_frame frame = { 2195 .frame_type = WSM_FRAME_TYPE_BEACON, 2196 }; 2197 2198 u16 tim_offset; 2199 u16 tim_len; 2200 2201 if (priv->mode == NL80211_IFTYPE_STATION || 2202 priv->mode == NL80211_IFTYPE_MONITOR || 2203 priv->mode == NL80211_IFTYPE_UNSPECIFIED) 2204 goto done; 2205 2206 if (priv->vif->p2p) 2207 frame.rate = WSM_TRANSMIT_RATE_6; 2208 2209 frame.skb = ieee80211_beacon_get_tim(priv->hw, priv->vif, 2210 &tim_offset, &tim_len); 2211 if (!frame.skb) 2212 return -ENOMEM; 2213 2214 ret = wsm_set_template_frame(priv, &frame); 2215 2216 if (ret) 2217 goto done; 2218 2219 /* TODO: Distill probe resp; remove TIM 2220 * and any other beacon-specific IEs 2221 */ 2222 mgmt = (void *)frame.skb->data; 2223 mgmt->frame_control = 2224 __cpu_to_le16(IEEE80211_FTYPE_MGMT | 2225 IEEE80211_STYPE_PROBE_RESP); 2226 2227 frame.frame_type = WSM_FRAME_TYPE_PROBE_RESPONSE; 2228 if (priv->vif->p2p) { 2229 ret = wsm_set_probe_responder(priv, true); 2230 } else { 2231 ret = wsm_set_template_frame(priv, &frame); 2232 wsm_set_probe_responder(priv, false); 2233 } 2234 2235 done: 2236 dev_kfree_skb(frame.skb); 2237 2238 return ret; 2239 } 2240 2241 static int cw1200_upload_pspoll(struct cw1200_common *priv) 2242 { 2243 int ret = 0; 2244 struct wsm_template_frame frame = { 2245 .frame_type = WSM_FRAME_TYPE_PS_POLL, 2246 .rate = 0xFF, 2247 }; 2248 2249 2250 frame.skb = ieee80211_pspoll_get(priv->hw, priv->vif); 2251 if (!frame.skb) 2252 return -ENOMEM; 2253 2254 ret = wsm_set_template_frame(priv, &frame); 2255 2256 dev_kfree_skb(frame.skb); 2257 2258 return ret; 2259 } 2260 2261 static int cw1200_upload_null(struct cw1200_common *priv) 2262 { 2263 int ret = 0; 2264 struct wsm_template_frame frame = { 2265 .frame_type = WSM_FRAME_TYPE_NULL, 2266 .rate = 0xFF, 2267 }; 2268 2269 frame.skb = ieee80211_nullfunc_get(priv->hw, priv->vif); 2270 if (!frame.skb) 2271 return -ENOMEM; 2272 2273 ret = wsm_set_template_frame(priv, &frame); 2274 2275 dev_kfree_skb(frame.skb); 2276 2277 return ret; 2278 } 2279 2280 static int cw1200_upload_qosnull(struct cw1200_common *priv) 2281 { 2282 /* TODO: This needs to be implemented 2283 2284 struct wsm_template_frame frame = { 2285 .frame_type = WSM_FRAME_TYPE_QOS_NULL, 2286 .rate = 0xFF, 2287 }; 2288 2289 frame.skb = ieee80211_qosnullfunc_get(priv->hw, priv->vif); 2290 if (!frame.skb) 2291 return -ENOMEM; 2292 2293 ret = wsm_set_template_frame(priv, &frame); 2294 2295 dev_kfree_skb(frame.skb); 2296 2297 */ 2298 return 0; 2299 } 2300 2301 static int cw1200_enable_beaconing(struct cw1200_common *priv, 2302 bool enable) 2303 { 2304 struct wsm_beacon_transmit transmit = { 2305 .enable_beaconing = enable, 2306 }; 2307 2308 return wsm_beacon_transmit(priv, &transmit); 2309 } 2310 2311 static int cw1200_start_ap(struct cw1200_common *priv) 2312 { 2313 int ret; 2314 struct ieee80211_bss_conf *conf = &priv->vif->bss_conf; 2315 struct wsm_start start = { 2316 .mode = priv->vif->p2p ? 2317 WSM_START_MODE_P2P_GO : WSM_START_MODE_AP, 2318 .band = (priv->channel->band == NL80211_BAND_5GHZ) ? 2319 WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G, 2320 .channel_number = priv->channel->hw_value, 2321 .beacon_interval = conf->beacon_int, 2322 .dtim_period = conf->dtim_period, 2323 .preamble = conf->use_short_preamble ? 2324 WSM_JOIN_PREAMBLE_SHORT : 2325 WSM_JOIN_PREAMBLE_LONG, 2326 .probe_delay = 100, 2327 .basic_rate_set = cw1200_rate_mask_to_wsm(priv, 2328 conf->basic_rates), 2329 }; 2330 struct wsm_operational_mode mode = { 2331 .power_mode = cw1200_power_mode, 2332 .disable_more_flag_usage = true, 2333 }; 2334 2335 memset(start.ssid, 0, sizeof(start.ssid)); 2336 if (!conf->hidden_ssid) { 2337 start.ssid_len = conf->ssid_len; 2338 memcpy(start.ssid, conf->ssid, start.ssid_len); 2339 } 2340 2341 priv->beacon_int = conf->beacon_int; 2342 priv->join_dtim_period = conf->dtim_period; 2343 2344 memset(&priv->link_id_db, 0, sizeof(priv->link_id_db)); 2345 2346 pr_debug("[AP] ch: %d(%d), bcn: %d(%d), brt: 0x%.8X, ssid: %.*s.\n", 2347 start.channel_number, start.band, 2348 start.beacon_interval, start.dtim_period, 2349 start.basic_rate_set, 2350 start.ssid_len, start.ssid); 2351 ret = wsm_start(priv, &start); 2352 if (!ret) 2353 ret = cw1200_upload_keys(priv); 2354 if (!ret && priv->vif->p2p) { 2355 pr_debug("[AP] Setting p2p powersave configuration.\n"); 2356 wsm_set_p2p_ps_modeinfo(priv, &priv->p2p_ps_modeinfo); 2357 } 2358 if (!ret) { 2359 wsm_set_block_ack_policy(priv, 0, 0); 2360 priv->join_status = CW1200_JOIN_STATUS_AP; 2361 cw1200_update_filtering(priv); 2362 } 2363 wsm_set_operational_mode(priv, &mode); 2364 return ret; 2365 } 2366 2367 static int cw1200_update_beaconing(struct cw1200_common *priv) 2368 { 2369 struct ieee80211_bss_conf *conf = &priv->vif->bss_conf; 2370 struct wsm_reset reset = { 2371 .link_id = 0, 2372 .reset_statistics = true, 2373 }; 2374 2375 if (priv->mode == NL80211_IFTYPE_AP) { 2376 /* TODO: check if changed channel, band */ 2377 if (priv->join_status != CW1200_JOIN_STATUS_AP || 2378 priv->beacon_int != conf->beacon_int) { 2379 pr_debug("ap restarting\n"); 2380 wsm_lock_tx(priv); 2381 if (priv->join_status != CW1200_JOIN_STATUS_PASSIVE) 2382 wsm_reset(priv, &reset); 2383 priv->join_status = CW1200_JOIN_STATUS_PASSIVE; 2384 cw1200_start_ap(priv); 2385 wsm_unlock_tx(priv); 2386 } else 2387 pr_debug("ap started join_status: %d\n", 2388 priv->join_status); 2389 } 2390 return 0; 2391 } 2392