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 28static void cw1200_do_join(struct cw1200_common *priv); 29static void cw1200_do_unjoin(struct cw1200_common *priv); 30 31static int cw1200_upload_beacon(struct cw1200_common *priv); 32static int cw1200_upload_pspoll(struct cw1200_common *priv); 33static int cw1200_upload_null(struct cw1200_common *priv); 34static int cw1200_upload_qosnull(struct cw1200_common *priv); 35static int cw1200_start_ap(struct cw1200_common *priv); 36static int cw1200_update_beaconing(struct cw1200_common *priv); 37static int cw1200_enable_beaconing(struct cw1200_common *priv, 38 bool enable); 39static void __cw1200_sta_notify(struct ieee80211_hw *dev, 40 struct ieee80211_vif *vif, 41 enum sta_notify_cmd notify_cmd, 42 int link_id); 43static int __cw1200_flush(struct cw1200_common *priv, bool drop); 44 45static 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 57int 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 91out: 92 mutex_unlock(&priv->conf_mutex); 93 return ret; 94} 95 96void 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 146static int cw1200_bssloss_mitigation = 1; 147module_param(cw1200_bssloss_mitigation, int, 0644); 148MODULE_PARM_DESC(cw1200_bssloss_mitigation, "BSS Loss mitigation. 0 == disabled, 1 == enabled (default)"); 149 150 151void __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 208int 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 251void 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 308int 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 327int 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 442void 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 514void 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 523void 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 535u64 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 574void 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 611int 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 653out: 654 mutex_unlock(&priv->conf_mutex); 655 return ret; 656} 657 658int 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 667int 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 683int 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 839finally: 840 mutex_unlock(&priv->conf_mutex); 841 return ret; 842} 843 844void 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 862int 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->mode == NL80211_IFTYPE_UNSPECIFIED) { 877 /* device is down, can _not_ set threshold */ 878 ret = -ENODEV; 879 goto out; 880 } 881 882 if (priv->rts_threshold == value) 883 goto out; 884 885 pr_debug("[STA] Setting RTS threshold: %d\n", 886 priv->rts_threshold); 887 888 /* mutex_lock(&priv->conf_mutex); */ 889 ret = wsm_write_mib(priv, WSM_MIB_ID_DOT11_RTS_THRESHOLD, 890 &val32, sizeof(val32)); 891 if (!ret) 892 priv->rts_threshold = value; 893 /* mutex_unlock(&priv->conf_mutex); */ 894 895out: 896 return ret; 897} 898 899/* If successful, LOCKS the TX queue! */ 900static int __cw1200_flush(struct cw1200_common *priv, bool drop) 901{ 902 int i, ret; 903 904 for (;;) { 905 /* TODO: correct flush handling is required when dev_stop. 906 * Temporary workaround: 2s 907 */ 908 if (drop) { 909 for (i = 0; i < 4; ++i) 910 cw1200_queue_clear(&priv->tx_queue[i]); 911 } else { 912 ret = wait_event_timeout( 913 priv->tx_queue_stats.wait_link_id_empty, 914 cw1200_queue_stats_is_empty( 915 &priv->tx_queue_stats, -1), 916 2 * HZ); 917 } 918 919 if (!drop && ret <= 0) { 920 ret = -ETIMEDOUT; 921 break; 922 } else { 923 ret = 0; 924 } 925 926 wsm_lock_tx(priv); 927 if (!cw1200_queue_stats_is_empty(&priv->tx_queue_stats, -1)) { 928 /* Highly unlikely: WSM requeued frames. */ 929 wsm_unlock_tx(priv); 930 continue; 931 } 932 break; 933 } 934 return ret; 935} 936 937void cw1200_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 938 u32 queues, bool drop) 939{ 940 struct cw1200_common *priv = hw->priv; 941 942 switch (priv->mode) { 943 case NL80211_IFTYPE_MONITOR: 944 drop = true; 945 break; 946 case NL80211_IFTYPE_AP: 947 if (!priv->enable_beacon) 948 drop = true; 949 break; 950 } 951 952 if (!__cw1200_flush(priv, drop)) 953 wsm_unlock_tx(priv); 954 955 return; 956} 957 958/* ******************************************************************** */ 959/* WSM callbacks */ 960 961void cw1200_free_event_queue(struct cw1200_common *priv) 962{ 963 LIST_HEAD(list); 964 965 spin_lock(&priv->event_queue_lock); 966 list_splice_init(&priv->event_queue, &list); 967 spin_unlock(&priv->event_queue_lock); 968 969 __cw1200_free_event_queue(&list); 970} 971 972void cw1200_event_handler(struct work_struct *work) 973{ 974 struct cw1200_common *priv = 975 container_of(work, struct cw1200_common, event_handler); 976 struct cw1200_wsm_event *event; 977 LIST_HEAD(list); 978 979 spin_lock(&priv->event_queue_lock); 980 list_splice_init(&priv->event_queue, &list); 981 spin_unlock(&priv->event_queue_lock); 982 983 list_for_each_entry(event, &list, link) { 984 switch (event->evt.id) { 985 case WSM_EVENT_ERROR: 986 pr_err("Unhandled WSM Error from LMAC\n"); 987 break; 988 case WSM_EVENT_BSS_LOST: 989 pr_debug("[CQM] BSS lost.\n"); 990 cancel_work_sync(&priv->unjoin_work); 991 if (!down_trylock(&priv->scan.lock)) { 992 cw1200_cqm_bssloss_sm(priv, 1, 0, 0); 993 up(&priv->scan.lock); 994 } else { 995 /* Scan is in progress. Delay reporting. 996 * Scan complete will trigger bss_loss_work 997 */ 998 priv->delayed_link_loss = 1; 999 /* Also start a watchdog. */ 1000 queue_delayed_work(priv->workqueue, 1001 &priv->bss_loss_work, 5*HZ); 1002 } 1003 break; 1004 case WSM_EVENT_BSS_REGAINED: 1005 pr_debug("[CQM] BSS regained.\n"); 1006 cw1200_cqm_bssloss_sm(priv, 0, 0, 0); 1007 cancel_work_sync(&priv->unjoin_work); 1008 break; 1009 case WSM_EVENT_RADAR_DETECTED: 1010 wiphy_info(priv->hw->wiphy, "radar pulse detected\n"); 1011 break; 1012 case WSM_EVENT_RCPI_RSSI: 1013 { 1014 /* RSSI: signed Q8.0, RCPI: unsigned Q7.1 1015 * RSSI = RCPI / 2 - 110 1016 */ 1017 int rcpi_rssi = (int)(event->evt.data & 0xFF); 1018 int cqm_evt; 1019 if (priv->cqm_use_rssi) 1020 rcpi_rssi = (s8)rcpi_rssi; 1021 else 1022 rcpi_rssi = rcpi_rssi / 2 - 110; 1023 1024 cqm_evt = (rcpi_rssi <= priv->cqm_rssi_thold) ? 1025 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW : 1026 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH; 1027 pr_debug("[CQM] RSSI event: %d.\n", rcpi_rssi); 1028 ieee80211_cqm_rssi_notify(priv->vif, cqm_evt, 1029 GFP_KERNEL); 1030 break; 1031 } 1032 case WSM_EVENT_BT_INACTIVE: 1033 pr_warn("Unhandled BT INACTIVE from LMAC\n"); 1034 break; 1035 case WSM_EVENT_BT_ACTIVE: 1036 pr_warn("Unhandled BT ACTIVE from LMAC\n"); 1037 break; 1038 } 1039 } 1040 __cw1200_free_event_queue(&list); 1041} 1042 1043void cw1200_bss_loss_work(struct work_struct *work) 1044{ 1045 struct cw1200_common *priv = 1046 container_of(work, struct cw1200_common, bss_loss_work.work); 1047 1048 pr_debug("[CQM] Reporting connection loss.\n"); 1049 wsm_lock_tx(priv); 1050 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0) 1051 wsm_unlock_tx(priv); 1052} 1053 1054void cw1200_bss_params_work(struct work_struct *work) 1055{ 1056 struct cw1200_common *priv = 1057 container_of(work, struct cw1200_common, bss_params_work); 1058 mutex_lock(&priv->conf_mutex); 1059 1060 priv->bss_params.reset_beacon_loss = 1; 1061 wsm_set_bss_params(priv, &priv->bss_params); 1062 priv->bss_params.reset_beacon_loss = 0; 1063 1064 mutex_unlock(&priv->conf_mutex); 1065} 1066 1067/* ******************************************************************** */ 1068/* Internal API */ 1069 1070/* This function is called to Parse the SDD file 1071 * to extract listen_interval and PTA related information 1072 * sdd is a TLV: u8 id, u8 len, u8 data[] 1073 */ 1074static int cw1200_parse_sdd_file(struct cw1200_common *priv) 1075{ 1076 const u8 *p = priv->sdd->data; 1077 int ret = 0; 1078 1079 while (p + 2 <= priv->sdd->data + priv->sdd->size) { 1080 if (p + p[1] + 2 > priv->sdd->data + priv->sdd->size) { 1081 pr_warn("Malformed sdd structure\n"); 1082 return -1; 1083 } 1084 switch (p[0]) { 1085 case SDD_PTA_CFG_ELT_ID: { 1086 u16 v; 1087 if (p[1] < 4) { 1088 pr_warn("SDD_PTA_CFG_ELT_ID malformed\n"); 1089 ret = -1; 1090 break; 1091 } 1092 v = le16_to_cpu(*((__le16 *)(p + 2))); 1093 if (!v) /* non-zero means this is enabled */ 1094 break; 1095 1096 v = le16_to_cpu(*((__le16 *)(p + 4))); 1097 priv->conf_listen_interval = (v >> 7) & 0x1F; 1098 pr_debug("PTA found; Listen Interval %d\n", 1099 priv->conf_listen_interval); 1100 break; 1101 } 1102 case SDD_REFERENCE_FREQUENCY_ELT_ID: { 1103 u16 clk = le16_to_cpu(*((__le16 *)(p + 2))); 1104 if (clk != priv->hw_refclk) 1105 pr_warn("SDD file doesn't match configured refclk (%d vs %d)\n", 1106 clk, priv->hw_refclk); 1107 break; 1108 } 1109 default: 1110 break; 1111 } 1112 p += p[1] + 2; 1113 } 1114 1115 if (!priv->bt_present) { 1116 pr_debug("PTA element NOT found.\n"); 1117 priv->conf_listen_interval = 0; 1118 } 1119 return ret; 1120} 1121 1122int cw1200_setup_mac(struct cw1200_common *priv) 1123{ 1124 int ret = 0; 1125 1126 /* NOTE: There is a bug in FW: it reports signal 1127 * as RSSI if RSSI subscription is enabled. 1128 * It's not enough to set WSM_RCPI_RSSI_USE_RSSI. 1129 * 1130 * NOTE2: RSSI based reports have been switched to RCPI, since 1131 * FW has a bug and RSSI reported values are not stable, 1132 * what can leads to signal level oscilations in user-end applications 1133 */ 1134 struct wsm_rcpi_rssi_threshold threshold = { 1135 .rssiRcpiMode = WSM_RCPI_RSSI_THRESHOLD_ENABLE | 1136 WSM_RCPI_RSSI_DONT_USE_UPPER | 1137 WSM_RCPI_RSSI_DONT_USE_LOWER, 1138 .rollingAverageCount = 16, 1139 }; 1140 1141 struct wsm_configuration cfg = { 1142 .dot11StationId = &priv->mac_addr[0], 1143 }; 1144 1145 /* Remember the decission here to make sure, we will handle 1146 * the RCPI/RSSI value correctly on WSM_EVENT_RCPI_RSS 1147 */ 1148 if (threshold.rssiRcpiMode & WSM_RCPI_RSSI_USE_RSSI) 1149 priv->cqm_use_rssi = true; 1150 1151 if (!priv->sdd) { 1152 ret = request_firmware(&priv->sdd, priv->sdd_path, priv->pdev); 1153 if (ret) { 1154 pr_err("Can't load sdd file %s.\n", priv->sdd_path); 1155 return ret; 1156 } 1157 cw1200_parse_sdd_file(priv); 1158 } 1159 1160 cfg.dpdData = priv->sdd->data; 1161 cfg.dpdData_size = priv->sdd->size; 1162 ret = wsm_configuration(priv, &cfg); 1163 if (ret) 1164 return ret; 1165 1166 /* Configure RSSI/SCPI reporting as RSSI. */ 1167 wsm_set_rcpi_rssi_threshold(priv, &threshold); 1168 1169 return 0; 1170} 1171 1172static void cw1200_join_complete(struct cw1200_common *priv) 1173{ 1174 pr_debug("[STA] Join complete (%d)\n", priv->join_complete_status); 1175 1176 priv->join_pending = false; 1177 if (priv->join_complete_status) { 1178 priv->join_status = CW1200_JOIN_STATUS_PASSIVE; 1179 cw1200_update_listening(priv, priv->listening); 1180 cw1200_do_unjoin(priv); 1181 ieee80211_connection_loss(priv->vif); 1182 } else { 1183 if (priv->mode == NL80211_IFTYPE_ADHOC) 1184 priv->join_status = CW1200_JOIN_STATUS_IBSS; 1185 else 1186 priv->join_status = CW1200_JOIN_STATUS_PRE_STA; 1187 } 1188 wsm_unlock_tx(priv); /* Clearing the lock held before do_join() */ 1189} 1190 1191void cw1200_join_complete_work(struct work_struct *work) 1192{ 1193 struct cw1200_common *priv = 1194 container_of(work, struct cw1200_common, join_complete_work); 1195 mutex_lock(&priv->conf_mutex); 1196 cw1200_join_complete(priv); 1197 mutex_unlock(&priv->conf_mutex); 1198} 1199 1200void cw1200_join_complete_cb(struct cw1200_common *priv, 1201 struct wsm_join_complete *arg) 1202{ 1203 pr_debug("[STA] cw1200_join_complete_cb called, status=%d.\n", 1204 arg->status); 1205 1206 if (cancel_delayed_work(&priv->join_timeout)) { 1207 priv->join_complete_status = arg->status; 1208 queue_work(priv->workqueue, &priv->join_complete_work); 1209 } 1210} 1211 1212/* MUST be called with tx_lock held! It will be unlocked for us. */ 1213static void cw1200_do_join(struct cw1200_common *priv) 1214{ 1215 const u8 *bssid; 1216 struct ieee80211_bss_conf *conf = &priv->vif->bss_conf; 1217 struct cfg80211_bss *bss = NULL; 1218 struct wsm_protected_mgmt_policy mgmt_policy; 1219 struct wsm_join join = { 1220 .mode = conf->ibss_joined ? 1221 WSM_JOIN_MODE_IBSS : WSM_JOIN_MODE_BSS, 1222 .preamble_type = WSM_JOIN_PREAMBLE_LONG, 1223 .probe_for_join = 1, 1224 .atim_window = 0, 1225 .basic_rate_set = cw1200_rate_mask_to_wsm(priv, 1226 conf->basic_rates), 1227 }; 1228 if (delayed_work_pending(&priv->join_timeout)) { 1229 pr_warn("[STA] - Join request already pending, skipping..\n"); 1230 wsm_unlock_tx(priv); 1231 return; 1232 } 1233 1234 if (priv->join_status) 1235 cw1200_do_unjoin(priv); 1236 1237 bssid = priv->vif->bss_conf.bssid; 1238 1239 bss = cfg80211_get_bss(priv->hw->wiphy, priv->channel, bssid, NULL, 0, 1240 IEEE80211_BSS_TYPE_ANY, IEEE80211_PRIVACY_ANY); 1241 1242 if (!bss && !conf->ibss_joined) { 1243 wsm_unlock_tx(priv); 1244 return; 1245 } 1246 1247 mutex_lock(&priv->conf_mutex); 1248 1249 /* Under the conf lock: check scan status and 1250 * bail out if it is in progress. 1251 */ 1252 if (atomic_read(&priv->scan.in_progress)) { 1253 wsm_unlock_tx(priv); 1254 goto done_put; 1255 } 1256 1257 priv->join_pending = true; 1258 1259 /* Sanity check basic rates */ 1260 if (!join.basic_rate_set) 1261 join.basic_rate_set = 7; 1262 1263 /* Sanity check beacon interval */ 1264 if (!priv->beacon_int) 1265 priv->beacon_int = 1; 1266 1267 join.beacon_interval = priv->beacon_int; 1268 1269 /* BT Coex related changes */ 1270 if (priv->bt_present) { 1271 if (((priv->conf_listen_interval * 100) % 1272 priv->beacon_int) == 0) 1273 priv->listen_interval = 1274 ((priv->conf_listen_interval * 100) / 1275 priv->beacon_int); 1276 else 1277 priv->listen_interval = 1278 ((priv->conf_listen_interval * 100) / 1279 priv->beacon_int + 1); 1280 } 1281 1282 if (priv->hw->conf.ps_dtim_period) 1283 priv->join_dtim_period = priv->hw->conf.ps_dtim_period; 1284 join.dtim_period = priv->join_dtim_period; 1285 1286 join.channel_number = priv->channel->hw_value; 1287 join.band = (priv->channel->band == IEEE80211_BAND_5GHZ) ? 1288 WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G; 1289 1290 memcpy(join.bssid, bssid, sizeof(join.bssid)); 1291 1292 pr_debug("[STA] Join BSSID: %pM DTIM: %d, interval: %d\n", 1293 join.bssid, 1294 join.dtim_period, priv->beacon_int); 1295 1296 if (!conf->ibss_joined) { 1297 const u8 *ssidie; 1298 rcu_read_lock(); 1299 ssidie = ieee80211_bss_get_ie(bss, WLAN_EID_SSID); 1300 if (ssidie) { 1301 join.ssid_len = ssidie[1]; 1302 memcpy(join.ssid, &ssidie[2], join.ssid_len); 1303 } 1304 rcu_read_unlock(); 1305 } 1306 1307 if (priv->vif->p2p) { 1308 join.flags |= WSM_JOIN_FLAGS_P2P_GO; 1309 join.basic_rate_set = 1310 cw1200_rate_mask_to_wsm(priv, 0xFF0); 1311 } 1312 1313 /* Enable asynchronous join calls */ 1314 if (!conf->ibss_joined) { 1315 join.flags |= WSM_JOIN_FLAGS_FORCE; 1316 join.flags |= WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND; 1317 } 1318 1319 wsm_flush_tx(priv); 1320 1321 /* Stay Awake for Join and Auth Timeouts and a bit more */ 1322 cw1200_pm_stay_awake(&priv->pm_state, 1323 CW1200_JOIN_TIMEOUT + CW1200_AUTH_TIMEOUT); 1324 1325 cw1200_update_listening(priv, false); 1326 1327 /* Turn on Block ACKs */ 1328 wsm_set_block_ack_policy(priv, priv->ba_tx_tid_mask, 1329 priv->ba_rx_tid_mask); 1330 1331 /* Set up timeout */ 1332 if (join.flags & WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND) { 1333 priv->join_status = CW1200_JOIN_STATUS_JOINING; 1334 queue_delayed_work(priv->workqueue, 1335 &priv->join_timeout, 1336 CW1200_JOIN_TIMEOUT); 1337 } 1338 1339 /* 802.11w protected mgmt frames */ 1340 mgmt_policy.protectedMgmtEnable = 0; 1341 mgmt_policy.unprotectedMgmtFramesAllowed = 1; 1342 mgmt_policy.encryptionForAuthFrame = 1; 1343 wsm_set_protected_mgmt_policy(priv, &mgmt_policy); 1344 1345 /* Perform actual join */ 1346 if (wsm_join(priv, &join)) { 1347 pr_err("[STA] cw1200_join_work: wsm_join failed!\n"); 1348 cancel_delayed_work_sync(&priv->join_timeout); 1349 cw1200_update_listening(priv, priv->listening); 1350 /* Tx lock still held, unjoin will clear it. */ 1351 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0) 1352 wsm_unlock_tx(priv); 1353 } else { 1354 if (!(join.flags & WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND)) 1355 cw1200_join_complete(priv); /* Will clear tx_lock */ 1356 1357 /* Upload keys */ 1358 cw1200_upload_keys(priv); 1359 1360 /* Due to beacon filtering it is possible that the 1361 * AP's beacon is not known for the mac80211 stack. 1362 * Disable filtering temporary to make sure the stack 1363 * receives at least one 1364 */ 1365 priv->disable_beacon_filter = true; 1366 } 1367 cw1200_update_filtering(priv); 1368 1369done_put: 1370 mutex_unlock(&priv->conf_mutex); 1371 if (bss) 1372 cfg80211_put_bss(priv->hw->wiphy, bss); 1373} 1374 1375void cw1200_join_timeout(struct work_struct *work) 1376{ 1377 struct cw1200_common *priv = 1378 container_of(work, struct cw1200_common, join_timeout.work); 1379 pr_debug("[WSM] Join timed out.\n"); 1380 wsm_lock_tx(priv); 1381 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0) 1382 wsm_unlock_tx(priv); 1383} 1384 1385static void cw1200_do_unjoin(struct cw1200_common *priv) 1386{ 1387 struct wsm_reset reset = { 1388 .reset_statistics = true, 1389 }; 1390 1391 cancel_delayed_work_sync(&priv->join_timeout); 1392 1393 mutex_lock(&priv->conf_mutex); 1394 priv->join_pending = false; 1395 1396 if (atomic_read(&priv->scan.in_progress)) { 1397 if (priv->delayed_unjoin) 1398 wiphy_dbg(priv->hw->wiphy, "Delayed unjoin is already scheduled.\n"); 1399 else 1400 priv->delayed_unjoin = true; 1401 goto done; 1402 } 1403 1404 priv->delayed_link_loss = false; 1405 1406 if (!priv->join_status) 1407 goto done; 1408 1409 if (priv->join_status == CW1200_JOIN_STATUS_AP) 1410 goto done; 1411 1412 cancel_work_sync(&priv->update_filtering_work); 1413 cancel_work_sync(&priv->set_beacon_wakeup_period_work); 1414 priv->join_status = CW1200_JOIN_STATUS_PASSIVE; 1415 1416 /* Unjoin is a reset. */ 1417 wsm_flush_tx(priv); 1418 wsm_keep_alive_period(priv, 0); 1419 wsm_reset(priv, &reset); 1420 wsm_set_output_power(priv, priv->output_power * 10); 1421 priv->join_dtim_period = 0; 1422 cw1200_setup_mac(priv); 1423 cw1200_free_event_queue(priv); 1424 cancel_work_sync(&priv->event_handler); 1425 cw1200_update_listening(priv, priv->listening); 1426 cw1200_cqm_bssloss_sm(priv, 0, 0, 0); 1427 1428 /* Disable Block ACKs */ 1429 wsm_set_block_ack_policy(priv, 0, 0); 1430 1431 priv->disable_beacon_filter = false; 1432 cw1200_update_filtering(priv); 1433 memset(&priv->association_mode, 0, 1434 sizeof(priv->association_mode)); 1435 memset(&priv->bss_params, 0, sizeof(priv->bss_params)); 1436 priv->setbssparams_done = false; 1437 memset(&priv->firmware_ps_mode, 0, 1438 sizeof(priv->firmware_ps_mode)); 1439 1440 pr_debug("[STA] Unjoin completed.\n"); 1441 1442done: 1443 mutex_unlock(&priv->conf_mutex); 1444} 1445 1446void cw1200_unjoin_work(struct work_struct *work) 1447{ 1448 struct cw1200_common *priv = 1449 container_of(work, struct cw1200_common, unjoin_work); 1450 1451 cw1200_do_unjoin(priv); 1452 1453 /* Tell the stack we're dead */ 1454 ieee80211_connection_loss(priv->vif); 1455 1456 wsm_unlock_tx(priv); 1457} 1458 1459int cw1200_enable_listening(struct cw1200_common *priv) 1460{ 1461 struct wsm_start start = { 1462 .mode = WSM_START_MODE_P2P_DEV, 1463 .band = WSM_PHY_BAND_2_4G, 1464 .beacon_interval = 100, 1465 .dtim_period = 1, 1466 .probe_delay = 0, 1467 .basic_rate_set = 0x0F, 1468 }; 1469 1470 if (priv->channel) { 1471 start.band = priv->channel->band == IEEE80211_BAND_5GHZ ? 1472 WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G; 1473 start.channel_number = priv->channel->hw_value; 1474 } else { 1475 start.band = WSM_PHY_BAND_2_4G; 1476 start.channel_number = 1; 1477 } 1478 1479 return wsm_start(priv, &start); 1480} 1481 1482int cw1200_disable_listening(struct cw1200_common *priv) 1483{ 1484 int ret; 1485 struct wsm_reset reset = { 1486 .reset_statistics = true, 1487 }; 1488 ret = wsm_reset(priv, &reset); 1489 return ret; 1490} 1491 1492void cw1200_update_listening(struct cw1200_common *priv, bool enabled) 1493{ 1494 if (enabled) { 1495 if (priv->join_status == CW1200_JOIN_STATUS_PASSIVE) { 1496 if (!cw1200_enable_listening(priv)) 1497 priv->join_status = CW1200_JOIN_STATUS_MONITOR; 1498 wsm_set_probe_responder(priv, true); 1499 } 1500 } else { 1501 if (priv->join_status == CW1200_JOIN_STATUS_MONITOR) { 1502 if (!cw1200_disable_listening(priv)) 1503 priv->join_status = CW1200_JOIN_STATUS_PASSIVE; 1504 wsm_set_probe_responder(priv, false); 1505 } 1506 } 1507} 1508 1509int cw1200_set_uapsd_param(struct cw1200_common *priv, 1510 const struct wsm_edca_params *arg) 1511{ 1512 int ret; 1513 u16 uapsd_flags = 0; 1514 1515 /* Here's the mapping AC [queue, bit] 1516 * VO [0,3], VI [1, 2], BE [2, 1], BK [3, 0] 1517 */ 1518 1519 if (arg->uapsd_enable[0]) 1520 uapsd_flags |= 1 << 3; 1521 1522 if (arg->uapsd_enable[1]) 1523 uapsd_flags |= 1 << 2; 1524 1525 if (arg->uapsd_enable[2]) 1526 uapsd_flags |= 1 << 1; 1527 1528 if (arg->uapsd_enable[3]) 1529 uapsd_flags |= 1; 1530 1531 /* Currently pseudo U-APSD operation is not supported, so setting 1532 * MinAutoTriggerInterval, MaxAutoTriggerInterval and 1533 * AutoTriggerStep to 0 1534 */ 1535 1536 priv->uapsd_info.uapsd_flags = cpu_to_le16(uapsd_flags); 1537 priv->uapsd_info.min_auto_trigger_interval = 0; 1538 priv->uapsd_info.max_auto_trigger_interval = 0; 1539 priv->uapsd_info.auto_trigger_step = 0; 1540 1541 ret = wsm_set_uapsd_info(priv, &priv->uapsd_info); 1542 return ret; 1543} 1544 1545/* ******************************************************************** */ 1546/* AP API */ 1547 1548int cw1200_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1549 struct ieee80211_sta *sta) 1550{ 1551 struct cw1200_common *priv = hw->priv; 1552 struct cw1200_sta_priv *sta_priv = 1553 (struct cw1200_sta_priv *)&sta->drv_priv; 1554 struct cw1200_link_entry *entry; 1555 struct sk_buff *skb; 1556 1557 if (priv->mode != NL80211_IFTYPE_AP) 1558 return 0; 1559 1560 sta_priv->link_id = cw1200_find_link_id(priv, sta->addr); 1561 if (WARN_ON(!sta_priv->link_id)) { 1562 wiphy_info(priv->hw->wiphy, 1563 "[AP] No more link IDs available.\n"); 1564 return -ENOENT; 1565 } 1566 1567 entry = &priv->link_id_db[sta_priv->link_id - 1]; 1568 spin_lock_bh(&priv->ps_state_lock); 1569 if ((sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK) == 1570 IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK) 1571 priv->sta_asleep_mask |= BIT(sta_priv->link_id); 1572 entry->status = CW1200_LINK_HARD; 1573 while ((skb = skb_dequeue(&entry->rx_queue))) 1574 ieee80211_rx_irqsafe(priv->hw, skb); 1575 spin_unlock_bh(&priv->ps_state_lock); 1576 return 0; 1577} 1578 1579int cw1200_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1580 struct ieee80211_sta *sta) 1581{ 1582 struct cw1200_common *priv = hw->priv; 1583 struct cw1200_sta_priv *sta_priv = 1584 (struct cw1200_sta_priv *)&sta->drv_priv; 1585 struct cw1200_link_entry *entry; 1586 1587 if (priv->mode != NL80211_IFTYPE_AP || !sta_priv->link_id) 1588 return 0; 1589 1590 entry = &priv->link_id_db[sta_priv->link_id - 1]; 1591 spin_lock_bh(&priv->ps_state_lock); 1592 entry->status = CW1200_LINK_RESERVE; 1593 entry->timestamp = jiffies; 1594 wsm_lock_tx_async(priv); 1595 if (queue_work(priv->workqueue, &priv->link_id_work) <= 0) 1596 wsm_unlock_tx(priv); 1597 spin_unlock_bh(&priv->ps_state_lock); 1598 flush_workqueue(priv->workqueue); 1599 return 0; 1600} 1601 1602static void __cw1200_sta_notify(struct ieee80211_hw *dev, 1603 struct ieee80211_vif *vif, 1604 enum sta_notify_cmd notify_cmd, 1605 int link_id) 1606{ 1607 struct cw1200_common *priv = dev->priv; 1608 u32 bit, prev; 1609 1610 /* Zero link id means "for all link IDs" */ 1611 if (link_id) 1612 bit = BIT(link_id); 1613 else if (WARN_ON_ONCE(notify_cmd != STA_NOTIFY_AWAKE)) 1614 bit = 0; 1615 else 1616 bit = priv->link_id_map; 1617 prev = priv->sta_asleep_mask & bit; 1618 1619 switch (notify_cmd) { 1620 case STA_NOTIFY_SLEEP: 1621 if (!prev) { 1622 if (priv->buffered_multicasts && 1623 !priv->sta_asleep_mask) 1624 queue_work(priv->workqueue, 1625 &priv->multicast_start_work); 1626 priv->sta_asleep_mask |= bit; 1627 } 1628 break; 1629 case STA_NOTIFY_AWAKE: 1630 if (prev) { 1631 priv->sta_asleep_mask &= ~bit; 1632 priv->pspoll_mask &= ~bit; 1633 if (priv->tx_multicast && link_id && 1634 !priv->sta_asleep_mask) 1635 queue_work(priv->workqueue, 1636 &priv->multicast_stop_work); 1637 cw1200_bh_wakeup(priv); 1638 } 1639 break; 1640 } 1641} 1642 1643void cw1200_sta_notify(struct ieee80211_hw *dev, 1644 struct ieee80211_vif *vif, 1645 enum sta_notify_cmd notify_cmd, 1646 struct ieee80211_sta *sta) 1647{ 1648 struct cw1200_common *priv = dev->priv; 1649 struct cw1200_sta_priv *sta_priv = 1650 (struct cw1200_sta_priv *)&sta->drv_priv; 1651 1652 spin_lock_bh(&priv->ps_state_lock); 1653 __cw1200_sta_notify(dev, vif, notify_cmd, sta_priv->link_id); 1654 spin_unlock_bh(&priv->ps_state_lock); 1655} 1656 1657static void cw1200_ps_notify(struct cw1200_common *priv, 1658 int link_id, bool ps) 1659{ 1660 if (link_id > CW1200_MAX_STA_IN_AP_MODE) 1661 return; 1662 1663 pr_debug("%s for LinkId: %d. STAs asleep: %.8X\n", 1664 ps ? "Stop" : "Start", 1665 link_id, priv->sta_asleep_mask); 1666 1667 __cw1200_sta_notify(priv->hw, priv->vif, 1668 ps ? STA_NOTIFY_SLEEP : STA_NOTIFY_AWAKE, link_id); 1669} 1670 1671static int cw1200_set_tim_impl(struct cw1200_common *priv, bool aid0_bit_set) 1672{ 1673 struct sk_buff *skb; 1674 struct wsm_update_ie update_ie = { 1675 .what = WSM_UPDATE_IE_BEACON, 1676 .count = 1, 1677 }; 1678 u16 tim_offset, tim_length; 1679 1680 pr_debug("[AP] mcast: %s.\n", aid0_bit_set ? "ena" : "dis"); 1681 1682 skb = ieee80211_beacon_get_tim(priv->hw, priv->vif, 1683 &tim_offset, &tim_length); 1684 if (!skb) { 1685 if (!__cw1200_flush(priv, true)) 1686 wsm_unlock_tx(priv); 1687 return -ENOENT; 1688 } 1689 1690 if (tim_offset && tim_length >= 6) { 1691 /* Ignore DTIM count from mac80211: 1692 * firmware handles DTIM internally. 1693 */ 1694 skb->data[tim_offset + 2] = 0; 1695 1696 /* Set/reset aid0 bit */ 1697 if (aid0_bit_set) 1698 skb->data[tim_offset + 4] |= 1; 1699 else 1700 skb->data[tim_offset + 4] &= ~1; 1701 } 1702 1703 update_ie.ies = &skb->data[tim_offset]; 1704 update_ie.length = tim_length; 1705 wsm_update_ie(priv, &update_ie); 1706 1707 dev_kfree_skb(skb); 1708 1709 return 0; 1710} 1711 1712void cw1200_set_tim_work(struct work_struct *work) 1713{ 1714 struct cw1200_common *priv = 1715 container_of(work, struct cw1200_common, set_tim_work); 1716 (void)cw1200_set_tim_impl(priv, priv->aid0_bit_set); 1717} 1718 1719int cw1200_set_tim(struct ieee80211_hw *dev, struct ieee80211_sta *sta, 1720 bool set) 1721{ 1722 struct cw1200_common *priv = dev->priv; 1723 queue_work(priv->workqueue, &priv->set_tim_work); 1724 return 0; 1725} 1726 1727void cw1200_set_cts_work(struct work_struct *work) 1728{ 1729 struct cw1200_common *priv = 1730 container_of(work, struct cw1200_common, set_cts_work); 1731 1732 u8 erp_ie[3] = {WLAN_EID_ERP_INFO, 0x1, 0}; 1733 struct wsm_update_ie update_ie = { 1734 .what = WSM_UPDATE_IE_BEACON, 1735 .count = 1, 1736 .ies = erp_ie, 1737 .length = 3, 1738 }; 1739 u32 erp_info; 1740 __le32 use_cts_prot; 1741 mutex_lock(&priv->conf_mutex); 1742 erp_info = priv->erp_info; 1743 mutex_unlock(&priv->conf_mutex); 1744 use_cts_prot = 1745 erp_info & WLAN_ERP_USE_PROTECTION ? 1746 __cpu_to_le32(1) : 0; 1747 1748 erp_ie[ERP_INFO_BYTE_OFFSET] = erp_info; 1749 1750 pr_debug("[STA] ERP information 0x%x\n", erp_info); 1751 1752 wsm_write_mib(priv, WSM_MIB_ID_NON_ERP_PROTECTION, 1753 &use_cts_prot, sizeof(use_cts_prot)); 1754 wsm_update_ie(priv, &update_ie); 1755 1756 return; 1757} 1758 1759static int cw1200_set_btcoexinfo(struct cw1200_common *priv) 1760{ 1761 struct wsm_override_internal_txrate arg; 1762 int ret = 0; 1763 1764 if (priv->mode == NL80211_IFTYPE_STATION) { 1765 /* Plumb PSPOLL and NULL template */ 1766 cw1200_upload_pspoll(priv); 1767 cw1200_upload_null(priv); 1768 cw1200_upload_qosnull(priv); 1769 } else { 1770 return 0; 1771 } 1772 1773 memset(&arg, 0, sizeof(struct wsm_override_internal_txrate)); 1774 1775 if (!priv->vif->p2p) { 1776 /* STATION mode */ 1777 if (priv->bss_params.operational_rate_set & ~0xF) { 1778 pr_debug("[STA] STA has ERP rates\n"); 1779 /* G or BG mode */ 1780 arg.internalTxRate = (__ffs( 1781 priv->bss_params.operational_rate_set & ~0xF)); 1782 } else { 1783 pr_debug("[STA] STA has non ERP rates\n"); 1784 /* B only mode */ 1785 arg.internalTxRate = (__ffs(le32_to_cpu(priv->association_mode.basic_rate_set))); 1786 } 1787 arg.nonErpInternalTxRate = (__ffs(le32_to_cpu(priv->association_mode.basic_rate_set))); 1788 } else { 1789 /* P2P mode */ 1790 arg.internalTxRate = (__ffs(priv->bss_params.operational_rate_set & ~0xF)); 1791 arg.nonErpInternalTxRate = (__ffs(priv->bss_params.operational_rate_set & ~0xF)); 1792 } 1793 1794 pr_debug("[STA] BTCOEX_INFO MODE %d, internalTxRate : %x, nonErpInternalTxRate: %x\n", 1795 priv->mode, 1796 arg.internalTxRate, 1797 arg.nonErpInternalTxRate); 1798 1799 ret = wsm_write_mib(priv, WSM_MIB_ID_OVERRIDE_INTERNAL_TX_RATE, 1800 &arg, sizeof(arg)); 1801 1802 return ret; 1803} 1804 1805void cw1200_bss_info_changed(struct ieee80211_hw *dev, 1806 struct ieee80211_vif *vif, 1807 struct ieee80211_bss_conf *info, 1808 u32 changed) 1809{ 1810 struct cw1200_common *priv = dev->priv; 1811 bool do_join = false; 1812 1813 mutex_lock(&priv->conf_mutex); 1814 1815 pr_debug("BSS CHANGED: %08x\n", changed); 1816 1817 /* TODO: BSS_CHANGED_QOS */ 1818 /* TODO: BSS_CHANGED_TXPOWER */ 1819 1820 if (changed & BSS_CHANGED_ARP_FILTER) { 1821 struct wsm_mib_arp_ipv4_filter filter = {0}; 1822 int i; 1823 1824 pr_debug("[STA] BSS_CHANGED_ARP_FILTER cnt: %d\n", 1825 info->arp_addr_cnt); 1826 1827 /* Currently only one IP address is supported by firmware. 1828 * In case of more IPs arp filtering will be disabled. 1829 */ 1830 if (info->arp_addr_cnt > 0 && 1831 info->arp_addr_cnt <= WSM_MAX_ARP_IP_ADDRTABLE_ENTRIES) { 1832 for (i = 0; i < info->arp_addr_cnt; i++) { 1833 filter.ipv4addrs[i] = info->arp_addr_list[i]; 1834 pr_debug("[STA] addr[%d]: 0x%X\n", 1835 i, filter.ipv4addrs[i]); 1836 } 1837 filter.enable = __cpu_to_le32(1); 1838 } 1839 1840 pr_debug("[STA] arp ip filter enable: %d\n", 1841 __le32_to_cpu(filter.enable)); 1842 1843 wsm_set_arp_ipv4_filter(priv, &filter); 1844 } 1845 1846 if (changed & 1847 (BSS_CHANGED_BEACON | 1848 BSS_CHANGED_AP_PROBE_RESP | 1849 BSS_CHANGED_BSSID | 1850 BSS_CHANGED_SSID | 1851 BSS_CHANGED_IBSS)) { 1852 pr_debug("BSS_CHANGED_BEACON\n"); 1853 priv->beacon_int = info->beacon_int; 1854 cw1200_update_beaconing(priv); 1855 cw1200_upload_beacon(priv); 1856 } 1857 1858 if (changed & BSS_CHANGED_BEACON_ENABLED) { 1859 pr_debug("BSS_CHANGED_BEACON_ENABLED (%d)\n", info->enable_beacon); 1860 1861 if (priv->enable_beacon != info->enable_beacon) { 1862 cw1200_enable_beaconing(priv, info->enable_beacon); 1863 priv->enable_beacon = info->enable_beacon; 1864 } 1865 } 1866 1867 if (changed & BSS_CHANGED_BEACON_INT) { 1868 pr_debug("CHANGED_BEACON_INT\n"); 1869 if (info->ibss_joined) 1870 do_join = true; 1871 else if (priv->join_status == CW1200_JOIN_STATUS_AP) 1872 cw1200_update_beaconing(priv); 1873 } 1874 1875 /* assoc/disassoc, or maybe AID changed */ 1876 if (changed & BSS_CHANGED_ASSOC) { 1877 wsm_lock_tx(priv); 1878 priv->wep_default_key_id = -1; 1879 wsm_unlock_tx(priv); 1880 } 1881 1882 if (changed & BSS_CHANGED_BSSID) { 1883 pr_debug("BSS_CHANGED_BSSID\n"); 1884 do_join = true; 1885 } 1886 1887 if (changed & 1888 (BSS_CHANGED_ASSOC | 1889 BSS_CHANGED_BSSID | 1890 BSS_CHANGED_IBSS | 1891 BSS_CHANGED_BASIC_RATES | 1892 BSS_CHANGED_HT)) { 1893 pr_debug("BSS_CHANGED_ASSOC\n"); 1894 if (info->assoc) { 1895 if (priv->join_status < CW1200_JOIN_STATUS_PRE_STA) { 1896 ieee80211_connection_loss(vif); 1897 mutex_unlock(&priv->conf_mutex); 1898 return; 1899 } else if (priv->join_status == CW1200_JOIN_STATUS_PRE_STA) { 1900 priv->join_status = CW1200_JOIN_STATUS_STA; 1901 } 1902 } else { 1903 do_join = true; 1904 } 1905 1906 if (info->assoc || info->ibss_joined) { 1907 struct ieee80211_sta *sta = NULL; 1908 __le32 htprot = 0; 1909 1910 if (info->dtim_period) 1911 priv->join_dtim_period = info->dtim_period; 1912 priv->beacon_int = info->beacon_int; 1913 1914 rcu_read_lock(); 1915 1916 if (info->bssid && !info->ibss_joined) 1917 sta = ieee80211_find_sta(vif, info->bssid); 1918 if (sta) { 1919 priv->ht_info.ht_cap = sta->ht_cap; 1920 priv->bss_params.operational_rate_set = 1921 cw1200_rate_mask_to_wsm(priv, 1922 sta->supp_rates[priv->channel->band]); 1923 priv->ht_info.channel_type = cfg80211_get_chandef_type(&dev->conf.chandef); 1924 priv->ht_info.operation_mode = info->ht_operation_mode; 1925 } else { 1926 memset(&priv->ht_info, 0, 1927 sizeof(priv->ht_info)); 1928 priv->bss_params.operational_rate_set = -1; 1929 } 1930 rcu_read_unlock(); 1931 1932 /* Non Greenfield stations present */ 1933 if (priv->ht_info.operation_mode & 1934 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT) 1935 htprot |= cpu_to_le32(WSM_NON_GREENFIELD_STA_PRESENT); 1936 1937 /* Set HT protection method */ 1938 htprot |= cpu_to_le32((priv->ht_info.operation_mode & IEEE80211_HT_OP_MODE_PROTECTION) << 2); 1939 1940 /* TODO: 1941 * STBC_param.dual_cts 1942 * STBC_param.LSIG_TXOP_FILL 1943 */ 1944 1945 wsm_write_mib(priv, WSM_MIB_ID_SET_HT_PROTECTION, 1946 &htprot, sizeof(htprot)); 1947 1948 priv->association_mode.greenfield = 1949 cw1200_ht_greenfield(&priv->ht_info); 1950 priv->association_mode.flags = 1951 WSM_ASSOCIATION_MODE_SNOOP_ASSOC_FRAMES | 1952 WSM_ASSOCIATION_MODE_USE_PREAMBLE_TYPE | 1953 WSM_ASSOCIATION_MODE_USE_HT_MODE | 1954 WSM_ASSOCIATION_MODE_USE_BASIC_RATE_SET | 1955 WSM_ASSOCIATION_MODE_USE_MPDU_START_SPACING; 1956 priv->association_mode.preamble = 1957 info->use_short_preamble ? 1958 WSM_JOIN_PREAMBLE_SHORT : 1959 WSM_JOIN_PREAMBLE_LONG; 1960 priv->association_mode.basic_rate_set = __cpu_to_le32( 1961 cw1200_rate_mask_to_wsm(priv, 1962 info->basic_rates)); 1963 priv->association_mode.mpdu_start_spacing = 1964 cw1200_ht_ampdu_density(&priv->ht_info); 1965 1966 cw1200_cqm_bssloss_sm(priv, 0, 0, 0); 1967 cancel_work_sync(&priv->unjoin_work); 1968 1969 priv->bss_params.beacon_lost_count = priv->cqm_beacon_loss_count; 1970 priv->bss_params.aid = info->aid; 1971 1972 if (priv->join_dtim_period < 1) 1973 priv->join_dtim_period = 1; 1974 1975 pr_debug("[STA] DTIM %d, interval: %d\n", 1976 priv->join_dtim_period, priv->beacon_int); 1977 pr_debug("[STA] Preamble: %d, Greenfield: %d, Aid: %d, Rates: 0x%.8X, Basic: 0x%.8X\n", 1978 priv->association_mode.preamble, 1979 priv->association_mode.greenfield, 1980 priv->bss_params.aid, 1981 priv->bss_params.operational_rate_set, 1982 priv->association_mode.basic_rate_set); 1983 wsm_set_association_mode(priv, &priv->association_mode); 1984 1985 if (!info->ibss_joined) { 1986 wsm_keep_alive_period(priv, 30 /* sec */); 1987 wsm_set_bss_params(priv, &priv->bss_params); 1988 priv->setbssparams_done = true; 1989 cw1200_set_beacon_wakeup_period_work(&priv->set_beacon_wakeup_period_work); 1990 cw1200_set_pm(priv, &priv->powersave_mode); 1991 } 1992 if (priv->vif->p2p) { 1993 pr_debug("[STA] Setting p2p powersave configuration.\n"); 1994 wsm_set_p2p_ps_modeinfo(priv, 1995 &priv->p2p_ps_modeinfo); 1996 } 1997 if (priv->bt_present) 1998 cw1200_set_btcoexinfo(priv); 1999 } else { 2000 memset(&priv->association_mode, 0, 2001 sizeof(priv->association_mode)); 2002 memset(&priv->bss_params, 0, sizeof(priv->bss_params)); 2003 } 2004 } 2005 2006 /* ERP Protection */ 2007 if (changed & (BSS_CHANGED_ASSOC | 2008 BSS_CHANGED_ERP_CTS_PROT | 2009 BSS_CHANGED_ERP_PREAMBLE)) { 2010 u32 prev_erp_info = priv->erp_info; 2011 if (info->use_cts_prot) 2012 priv->erp_info |= WLAN_ERP_USE_PROTECTION; 2013 else if (!(prev_erp_info & WLAN_ERP_NON_ERP_PRESENT)) 2014 priv->erp_info &= ~WLAN_ERP_USE_PROTECTION; 2015 2016 if (info->use_short_preamble) 2017 priv->erp_info |= WLAN_ERP_BARKER_PREAMBLE; 2018 else 2019 priv->erp_info &= ~WLAN_ERP_BARKER_PREAMBLE; 2020 2021 pr_debug("[STA] ERP Protection: %x\n", priv->erp_info); 2022 2023 if (prev_erp_info != priv->erp_info) 2024 queue_work(priv->workqueue, &priv->set_cts_work); 2025 } 2026 2027 /* ERP Slottime */ 2028 if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_ERP_SLOT)) { 2029 __le32 slot_time = info->use_short_slot ? 2030 __cpu_to_le32(9) : __cpu_to_le32(20); 2031 pr_debug("[STA] Slot time: %d us.\n", 2032 __le32_to_cpu(slot_time)); 2033 wsm_write_mib(priv, WSM_MIB_ID_DOT11_SLOT_TIME, 2034 &slot_time, sizeof(slot_time)); 2035 } 2036 2037 if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_CQM)) { 2038 struct wsm_rcpi_rssi_threshold threshold = { 2039 .rollingAverageCount = 8, 2040 }; 2041 pr_debug("[CQM] RSSI threshold subscribe: %d +- %d\n", 2042 info->cqm_rssi_thold, info->cqm_rssi_hyst); 2043 priv->cqm_rssi_thold = info->cqm_rssi_thold; 2044 priv->cqm_rssi_hyst = info->cqm_rssi_hyst; 2045 2046 if (info->cqm_rssi_thold || info->cqm_rssi_hyst) { 2047 /* RSSI subscription enabled */ 2048 /* TODO: It's not a correct way of setting threshold. 2049 * Upper and lower must be set equal here and adjusted 2050 * in callback. However current implementation is much 2051 * more relaible and stable. 2052 */ 2053 2054 /* RSSI: signed Q8.0, RCPI: unsigned Q7.1 2055 * RSSI = RCPI / 2 - 110 2056 */ 2057 if (priv->cqm_use_rssi) { 2058 threshold.upperThreshold = 2059 info->cqm_rssi_thold + info->cqm_rssi_hyst; 2060 threshold.lowerThreshold = 2061 info->cqm_rssi_thold; 2062 threshold.rssiRcpiMode |= WSM_RCPI_RSSI_USE_RSSI; 2063 } else { 2064 threshold.upperThreshold = (info->cqm_rssi_thold + info->cqm_rssi_hyst + 110) * 2; 2065 threshold.lowerThreshold = (info->cqm_rssi_thold + 110) * 2; 2066 } 2067 threshold.rssiRcpiMode |= WSM_RCPI_RSSI_THRESHOLD_ENABLE; 2068 } else { 2069 /* There is a bug in FW, see sta.c. We have to enable 2070 * dummy subscription to get correct RSSI values. 2071 */ 2072 threshold.rssiRcpiMode |= 2073 WSM_RCPI_RSSI_THRESHOLD_ENABLE | 2074 WSM_RCPI_RSSI_DONT_USE_UPPER | 2075 WSM_RCPI_RSSI_DONT_USE_LOWER; 2076 if (priv->cqm_use_rssi) 2077 threshold.rssiRcpiMode |= WSM_RCPI_RSSI_USE_RSSI; 2078 } 2079 wsm_set_rcpi_rssi_threshold(priv, &threshold); 2080 } 2081 mutex_unlock(&priv->conf_mutex); 2082 2083 if (do_join) { 2084 wsm_lock_tx(priv); 2085 cw1200_do_join(priv); /* Will unlock it for us */ 2086 } 2087} 2088 2089void cw1200_multicast_start_work(struct work_struct *work) 2090{ 2091 struct cw1200_common *priv = 2092 container_of(work, struct cw1200_common, multicast_start_work); 2093 long tmo = priv->join_dtim_period * 2094 (priv->beacon_int + 20) * HZ / 1024; 2095 2096 cancel_work_sync(&priv->multicast_stop_work); 2097 2098 if (!priv->aid0_bit_set) { 2099 wsm_lock_tx(priv); 2100 cw1200_set_tim_impl(priv, true); 2101 priv->aid0_bit_set = true; 2102 mod_timer(&priv->mcast_timeout, jiffies + tmo); 2103 wsm_unlock_tx(priv); 2104 } 2105} 2106 2107void cw1200_multicast_stop_work(struct work_struct *work) 2108{ 2109 struct cw1200_common *priv = 2110 container_of(work, struct cw1200_common, multicast_stop_work); 2111 2112 if (priv->aid0_bit_set) { 2113 del_timer_sync(&priv->mcast_timeout); 2114 wsm_lock_tx(priv); 2115 priv->aid0_bit_set = false; 2116 cw1200_set_tim_impl(priv, false); 2117 wsm_unlock_tx(priv); 2118 } 2119} 2120 2121void cw1200_mcast_timeout(unsigned long arg) 2122{ 2123 struct cw1200_common *priv = 2124 (struct cw1200_common *)arg; 2125 2126 wiphy_warn(priv->hw->wiphy, 2127 "Multicast delivery timeout.\n"); 2128 spin_lock_bh(&priv->ps_state_lock); 2129 priv->tx_multicast = priv->aid0_bit_set && 2130 priv->buffered_multicasts; 2131 if (priv->tx_multicast) 2132 cw1200_bh_wakeup(priv); 2133 spin_unlock_bh(&priv->ps_state_lock); 2134} 2135 2136int cw1200_ampdu_action(struct ieee80211_hw *hw, 2137 struct ieee80211_vif *vif, 2138 enum ieee80211_ampdu_mlme_action action, 2139 struct ieee80211_sta *sta, u16 tid, u16 *ssn, 2140 u8 buf_size, bool amsdu) 2141{ 2142 /* Aggregation is implemented fully in firmware, 2143 * including block ack negotiation. Do not allow 2144 * mac80211 stack to do anything: it interferes with 2145 * the firmware. 2146 */ 2147 2148 /* Note that we still need this function stubbed. */ 2149 return -ENOTSUPP; 2150} 2151 2152/* ******************************************************************** */ 2153/* WSM callback */ 2154void cw1200_suspend_resume(struct cw1200_common *priv, 2155 struct wsm_suspend_resume *arg) 2156{ 2157 pr_debug("[AP] %s: %s\n", 2158 arg->stop ? "stop" : "start", 2159 arg->multicast ? "broadcast" : "unicast"); 2160 2161 if (arg->multicast) { 2162 bool cancel_tmo = false; 2163 spin_lock_bh(&priv->ps_state_lock); 2164 if (arg->stop) { 2165 priv->tx_multicast = false; 2166 } else { 2167 /* Firmware sends this indication every DTIM if there 2168 * is a STA in powersave connected. There is no reason 2169 * to suspend, following wakeup will consume much more 2170 * power than it could be saved. 2171 */ 2172 cw1200_pm_stay_awake(&priv->pm_state, 2173 priv->join_dtim_period * 2174 (priv->beacon_int + 20) * HZ / 1024); 2175 priv->tx_multicast = (priv->aid0_bit_set && 2176 priv->buffered_multicasts); 2177 if (priv->tx_multicast) { 2178 cancel_tmo = true; 2179 cw1200_bh_wakeup(priv); 2180 } 2181 } 2182 spin_unlock_bh(&priv->ps_state_lock); 2183 if (cancel_tmo) 2184 del_timer_sync(&priv->mcast_timeout); 2185 } else { 2186 spin_lock_bh(&priv->ps_state_lock); 2187 cw1200_ps_notify(priv, arg->link_id, arg->stop); 2188 spin_unlock_bh(&priv->ps_state_lock); 2189 if (!arg->stop) 2190 cw1200_bh_wakeup(priv); 2191 } 2192 return; 2193} 2194 2195/* ******************************************************************** */ 2196/* AP privates */ 2197 2198static int cw1200_upload_beacon(struct cw1200_common *priv) 2199{ 2200 int ret = 0; 2201 struct ieee80211_mgmt *mgmt; 2202 struct wsm_template_frame frame = { 2203 .frame_type = WSM_FRAME_TYPE_BEACON, 2204 }; 2205 2206 u16 tim_offset; 2207 u16 tim_len; 2208 2209 if (priv->mode == NL80211_IFTYPE_STATION || 2210 priv->mode == NL80211_IFTYPE_MONITOR || 2211 priv->mode == NL80211_IFTYPE_UNSPECIFIED) 2212 goto done; 2213 2214 if (priv->vif->p2p) 2215 frame.rate = WSM_TRANSMIT_RATE_6; 2216 2217 frame.skb = ieee80211_beacon_get_tim(priv->hw, priv->vif, 2218 &tim_offset, &tim_len); 2219 if (!frame.skb) 2220 return -ENOMEM; 2221 2222 ret = wsm_set_template_frame(priv, &frame); 2223 2224 if (ret) 2225 goto done; 2226 2227 /* TODO: Distill probe resp; remove TIM 2228 * and any other beacon-specific IEs 2229 */ 2230 mgmt = (void *)frame.skb->data; 2231 mgmt->frame_control = 2232 __cpu_to_le16(IEEE80211_FTYPE_MGMT | 2233 IEEE80211_STYPE_PROBE_RESP); 2234 2235 frame.frame_type = WSM_FRAME_TYPE_PROBE_RESPONSE; 2236 if (priv->vif->p2p) { 2237 ret = wsm_set_probe_responder(priv, true); 2238 } else { 2239 ret = wsm_set_template_frame(priv, &frame); 2240 wsm_set_probe_responder(priv, false); 2241 } 2242 2243done: 2244 dev_kfree_skb(frame.skb); 2245 2246 return ret; 2247} 2248 2249static int cw1200_upload_pspoll(struct cw1200_common *priv) 2250{ 2251 int ret = 0; 2252 struct wsm_template_frame frame = { 2253 .frame_type = WSM_FRAME_TYPE_PS_POLL, 2254 .rate = 0xFF, 2255 }; 2256 2257 2258 frame.skb = ieee80211_pspoll_get(priv->hw, priv->vif); 2259 if (!frame.skb) 2260 return -ENOMEM; 2261 2262 ret = wsm_set_template_frame(priv, &frame); 2263 2264 dev_kfree_skb(frame.skb); 2265 2266 return ret; 2267} 2268 2269static int cw1200_upload_null(struct cw1200_common *priv) 2270{ 2271 int ret = 0; 2272 struct wsm_template_frame frame = { 2273 .frame_type = WSM_FRAME_TYPE_NULL, 2274 .rate = 0xFF, 2275 }; 2276 2277 frame.skb = ieee80211_nullfunc_get(priv->hw, priv->vif); 2278 if (!frame.skb) 2279 return -ENOMEM; 2280 2281 ret = wsm_set_template_frame(priv, &frame); 2282 2283 dev_kfree_skb(frame.skb); 2284 2285 return ret; 2286} 2287 2288static int cw1200_upload_qosnull(struct cw1200_common *priv) 2289{ 2290 /* TODO: This needs to be implemented 2291 2292 struct wsm_template_frame frame = { 2293 .frame_type = WSM_FRAME_TYPE_QOS_NULL, 2294 .rate = 0xFF, 2295 }; 2296 2297 frame.skb = ieee80211_qosnullfunc_get(priv->hw, priv->vif); 2298 if (!frame.skb) 2299 return -ENOMEM; 2300 2301 ret = wsm_set_template_frame(priv, &frame); 2302 2303 dev_kfree_skb(frame.skb); 2304 2305 */ 2306 return 0; 2307} 2308 2309static int cw1200_enable_beaconing(struct cw1200_common *priv, 2310 bool enable) 2311{ 2312 struct wsm_beacon_transmit transmit = { 2313 .enable_beaconing = enable, 2314 }; 2315 2316 return wsm_beacon_transmit(priv, &transmit); 2317} 2318 2319static int cw1200_start_ap(struct cw1200_common *priv) 2320{ 2321 int ret; 2322 struct ieee80211_bss_conf *conf = &priv->vif->bss_conf; 2323 struct wsm_start start = { 2324 .mode = priv->vif->p2p ? 2325 WSM_START_MODE_P2P_GO : WSM_START_MODE_AP, 2326 .band = (priv->channel->band == IEEE80211_BAND_5GHZ) ? 2327 WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G, 2328 .channel_number = priv->channel->hw_value, 2329 .beacon_interval = conf->beacon_int, 2330 .dtim_period = conf->dtim_period, 2331 .preamble = conf->use_short_preamble ? 2332 WSM_JOIN_PREAMBLE_SHORT : 2333 WSM_JOIN_PREAMBLE_LONG, 2334 .probe_delay = 100, 2335 .basic_rate_set = cw1200_rate_mask_to_wsm(priv, 2336 conf->basic_rates), 2337 }; 2338 struct wsm_operational_mode mode = { 2339 .power_mode = cw1200_power_mode, 2340 .disable_more_flag_usage = true, 2341 }; 2342 2343 memset(start.ssid, 0, sizeof(start.ssid)); 2344 if (!conf->hidden_ssid) { 2345 start.ssid_len = conf->ssid_len; 2346 memcpy(start.ssid, conf->ssid, start.ssid_len); 2347 } 2348 2349 priv->beacon_int = conf->beacon_int; 2350 priv->join_dtim_period = conf->dtim_period; 2351 2352 memset(&priv->link_id_db, 0, sizeof(priv->link_id_db)); 2353 2354 pr_debug("[AP] ch: %d(%d), bcn: %d(%d), brt: 0x%.8X, ssid: %.*s.\n", 2355 start.channel_number, start.band, 2356 start.beacon_interval, start.dtim_period, 2357 start.basic_rate_set, 2358 start.ssid_len, start.ssid); 2359 ret = wsm_start(priv, &start); 2360 if (!ret) 2361 ret = cw1200_upload_keys(priv); 2362 if (!ret && priv->vif->p2p) { 2363 pr_debug("[AP] Setting p2p powersave configuration.\n"); 2364 wsm_set_p2p_ps_modeinfo(priv, &priv->p2p_ps_modeinfo); 2365 } 2366 if (!ret) { 2367 wsm_set_block_ack_policy(priv, 0, 0); 2368 priv->join_status = CW1200_JOIN_STATUS_AP; 2369 cw1200_update_filtering(priv); 2370 } 2371 wsm_set_operational_mode(priv, &mode); 2372 return ret; 2373} 2374 2375static int cw1200_update_beaconing(struct cw1200_common *priv) 2376{ 2377 struct ieee80211_bss_conf *conf = &priv->vif->bss_conf; 2378 struct wsm_reset reset = { 2379 .link_id = 0, 2380 .reset_statistics = true, 2381 }; 2382 2383 if (priv->mode == NL80211_IFTYPE_AP) { 2384 /* TODO: check if changed channel, band */ 2385 if (priv->join_status != CW1200_JOIN_STATUS_AP || 2386 priv->beacon_int != conf->beacon_int) { 2387 pr_debug("ap restarting\n"); 2388 wsm_lock_tx(priv); 2389 if (priv->join_status != CW1200_JOIN_STATUS_PASSIVE) 2390 wsm_reset(priv, &reset); 2391 priv->join_status = CW1200_JOIN_STATUS_PASSIVE; 2392 cw1200_start_ap(priv); 2393 wsm_unlock_tx(priv); 2394 } else 2395 pr_debug("ap started join_status: %d\n", 2396 priv->join_status); 2397 } 2398 return 0; 2399} 2400