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_PROMISC_IN_BSS | 582 FIF_OTHER_BSS | 583 FIF_BCN_PRBRESP_PROMISC | 584 FIF_PROBE_REQ)); 585 586 *total_flags &= FIF_PROMISC_IN_BSS | 587 FIF_OTHER_BSS | 588 FIF_FCSFAIL | 589 FIF_BCN_PRBRESP_PROMISC | 590 FIF_PROBE_REQ; 591 592 down(&priv->scan.lock); 593 mutex_lock(&priv->conf_mutex); 594 595 priv->rx_filter.promiscuous = (*total_flags & FIF_PROMISC_IN_BSS) 596 ? 1 : 0; 597 priv->rx_filter.bssid = (*total_flags & (FIF_OTHER_BSS | 598 FIF_PROBE_REQ)) ? 1 : 0; 599 priv->rx_filter.fcs = (*total_flags & FIF_FCSFAIL) ? 1 : 0; 600 priv->disable_beacon_filter = !(*total_flags & 601 (FIF_BCN_PRBRESP_PROMISC | 602 FIF_PROMISC_IN_BSS | 603 FIF_PROBE_REQ)); 604 if (priv->listening != listening) { 605 priv->listening = listening; 606 wsm_lock_tx(priv); 607 cw1200_update_listening(priv, listening); 608 wsm_unlock_tx(priv); 609 } 610 cw1200_update_filtering(priv); 611 mutex_unlock(&priv->conf_mutex); 612 up(&priv->scan.lock); 613} 614 615int cw1200_conf_tx(struct ieee80211_hw *dev, struct ieee80211_vif *vif, 616 u16 queue, const struct ieee80211_tx_queue_params *params) 617{ 618 struct cw1200_common *priv = dev->priv; 619 int ret = 0; 620 /* To prevent re-applying PM request OID again and again*/ 621 bool old_uapsd_flags; 622 623 mutex_lock(&priv->conf_mutex); 624 625 if (queue < dev->queues) { 626 old_uapsd_flags = le16_to_cpu(priv->uapsd_info.uapsd_flags); 627 628 WSM_TX_QUEUE_SET(&priv->tx_queue_params, queue, 0, 0, 0); 629 ret = wsm_set_tx_queue_params(priv, 630 &priv->tx_queue_params.params[queue], queue); 631 if (ret) { 632 ret = -EINVAL; 633 goto out; 634 } 635 636 WSM_EDCA_SET(&priv->edca, queue, params->aifs, 637 params->cw_min, params->cw_max, 638 params->txop, 0xc8, 639 params->uapsd); 640 ret = wsm_set_edca_params(priv, &priv->edca); 641 if (ret) { 642 ret = -EINVAL; 643 goto out; 644 } 645 646 if (priv->mode == NL80211_IFTYPE_STATION) { 647 ret = cw1200_set_uapsd_param(priv, &priv->edca); 648 if (!ret && priv->setbssparams_done && 649 (priv->join_status == CW1200_JOIN_STATUS_STA) && 650 (old_uapsd_flags != le16_to_cpu(priv->uapsd_info.uapsd_flags))) 651 ret = cw1200_set_pm(priv, &priv->powersave_mode); 652 } 653 } else { 654 ret = -EINVAL; 655 } 656 657out: 658 mutex_unlock(&priv->conf_mutex); 659 return ret; 660} 661 662int cw1200_get_stats(struct ieee80211_hw *dev, 663 struct ieee80211_low_level_stats *stats) 664{ 665 struct cw1200_common *priv = dev->priv; 666 667 memcpy(stats, &priv->stats, sizeof(*stats)); 668 return 0; 669} 670 671int cw1200_set_pm(struct cw1200_common *priv, const struct wsm_set_pm *arg) 672{ 673 struct wsm_set_pm pm = *arg; 674 675 if (priv->uapsd_info.uapsd_flags != 0) 676 pm.mode &= ~WSM_PSM_FAST_PS_FLAG; 677 678 if (memcmp(&pm, &priv->firmware_ps_mode, 679 sizeof(struct wsm_set_pm))) { 680 priv->firmware_ps_mode = pm; 681 return wsm_set_pm(priv, &pm); 682 } else { 683 return 0; 684 } 685} 686 687int cw1200_set_key(struct ieee80211_hw *dev, enum set_key_cmd cmd, 688 struct ieee80211_vif *vif, struct ieee80211_sta *sta, 689 struct ieee80211_key_conf *key) 690{ 691 int ret = -EOPNOTSUPP; 692 struct cw1200_common *priv = dev->priv; 693 struct ieee80211_key_seq seq; 694 695 mutex_lock(&priv->conf_mutex); 696 697 if (cmd == SET_KEY) { 698 u8 *peer_addr = NULL; 699 int pairwise = (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) ? 700 1 : 0; 701 int idx = cw1200_alloc_key(priv); 702 struct wsm_add_key *wsm_key = &priv->keys[idx]; 703 704 if (idx < 0) { 705 ret = -EINVAL; 706 goto finally; 707 } 708 709 if (sta) 710 peer_addr = sta->addr; 711 712 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE | 713 IEEE80211_KEY_FLAG_RESERVE_TAILROOM; 714 715 switch (key->cipher) { 716 case WLAN_CIPHER_SUITE_WEP40: 717 case WLAN_CIPHER_SUITE_WEP104: 718 if (key->keylen > 16) { 719 cw1200_free_key(priv, idx); 720 ret = -EINVAL; 721 goto finally; 722 } 723 724 if (pairwise) { 725 wsm_key->type = WSM_KEY_TYPE_WEP_PAIRWISE; 726 memcpy(wsm_key->wep_pairwise.peer, 727 peer_addr, ETH_ALEN); 728 memcpy(wsm_key->wep_pairwise.keydata, 729 &key->key[0], key->keylen); 730 wsm_key->wep_pairwise.keylen = key->keylen; 731 } else { 732 wsm_key->type = WSM_KEY_TYPE_WEP_DEFAULT; 733 memcpy(wsm_key->wep_group.keydata, 734 &key->key[0], key->keylen); 735 wsm_key->wep_group.keylen = key->keylen; 736 wsm_key->wep_group.keyid = key->keyidx; 737 } 738 break; 739 case WLAN_CIPHER_SUITE_TKIP: 740 ieee80211_get_key_rx_seq(key, 0, &seq); 741 if (pairwise) { 742 wsm_key->type = WSM_KEY_TYPE_TKIP_PAIRWISE; 743 memcpy(wsm_key->tkip_pairwise.peer, 744 peer_addr, ETH_ALEN); 745 memcpy(wsm_key->tkip_pairwise.keydata, 746 &key->key[0], 16); 747 memcpy(wsm_key->tkip_pairwise.tx_mic_key, 748 &key->key[16], 8); 749 memcpy(wsm_key->tkip_pairwise.rx_mic_key, 750 &key->key[24], 8); 751 } else { 752 size_t mic_offset = 753 (priv->mode == NL80211_IFTYPE_AP) ? 754 16 : 24; 755 wsm_key->type = WSM_KEY_TYPE_TKIP_GROUP; 756 memcpy(wsm_key->tkip_group.keydata, 757 &key->key[0], 16); 758 memcpy(wsm_key->tkip_group.rx_mic_key, 759 &key->key[mic_offset], 8); 760 761 wsm_key->tkip_group.rx_seqnum[0] = seq.tkip.iv16 & 0xff; 762 wsm_key->tkip_group.rx_seqnum[1] = (seq.tkip.iv16 >> 8) & 0xff; 763 wsm_key->tkip_group.rx_seqnum[2] = seq.tkip.iv32 & 0xff; 764 wsm_key->tkip_group.rx_seqnum[3] = (seq.tkip.iv32 >> 8) & 0xff; 765 wsm_key->tkip_group.rx_seqnum[4] = (seq.tkip.iv32 >> 16) & 0xff; 766 wsm_key->tkip_group.rx_seqnum[5] = (seq.tkip.iv32 >> 24) & 0xff; 767 wsm_key->tkip_group.rx_seqnum[6] = 0; 768 wsm_key->tkip_group.rx_seqnum[7] = 0; 769 770 wsm_key->tkip_group.keyid = key->keyidx; 771 } 772 break; 773 case WLAN_CIPHER_SUITE_CCMP: 774 ieee80211_get_key_rx_seq(key, 0, &seq); 775 if (pairwise) { 776 wsm_key->type = WSM_KEY_TYPE_AES_PAIRWISE; 777 memcpy(wsm_key->aes_pairwise.peer, 778 peer_addr, ETH_ALEN); 779 memcpy(wsm_key->aes_pairwise.keydata, 780 &key->key[0], 16); 781 } else { 782 wsm_key->type = WSM_KEY_TYPE_AES_GROUP; 783 memcpy(wsm_key->aes_group.keydata, 784 &key->key[0], 16); 785 786 wsm_key->aes_group.rx_seqnum[0] = seq.ccmp.pn[5]; 787 wsm_key->aes_group.rx_seqnum[1] = seq.ccmp.pn[4]; 788 wsm_key->aes_group.rx_seqnum[2] = seq.ccmp.pn[3]; 789 wsm_key->aes_group.rx_seqnum[3] = seq.ccmp.pn[2]; 790 wsm_key->aes_group.rx_seqnum[4] = seq.ccmp.pn[1]; 791 wsm_key->aes_group.rx_seqnum[5] = seq.ccmp.pn[0]; 792 wsm_key->aes_group.rx_seqnum[6] = 0; 793 wsm_key->aes_group.rx_seqnum[7] = 0; 794 wsm_key->aes_group.keyid = key->keyidx; 795 } 796 break; 797 case WLAN_CIPHER_SUITE_SMS4: 798 if (pairwise) { 799 wsm_key->type = WSM_KEY_TYPE_WAPI_PAIRWISE; 800 memcpy(wsm_key->wapi_pairwise.peer, 801 peer_addr, ETH_ALEN); 802 memcpy(wsm_key->wapi_pairwise.keydata, 803 &key->key[0], 16); 804 memcpy(wsm_key->wapi_pairwise.mic_key, 805 &key->key[16], 16); 806 wsm_key->wapi_pairwise.keyid = key->keyidx; 807 } else { 808 wsm_key->type = WSM_KEY_TYPE_WAPI_GROUP; 809 memcpy(wsm_key->wapi_group.keydata, 810 &key->key[0], 16); 811 memcpy(wsm_key->wapi_group.mic_key, 812 &key->key[16], 16); 813 wsm_key->wapi_group.keyid = key->keyidx; 814 } 815 break; 816 default: 817 pr_warn("Unhandled key type %d\n", key->cipher); 818 cw1200_free_key(priv, idx); 819 ret = -EOPNOTSUPP; 820 goto finally; 821 } 822 ret = wsm_add_key(priv, wsm_key); 823 if (!ret) 824 key->hw_key_idx = idx; 825 else 826 cw1200_free_key(priv, idx); 827 } else if (cmd == DISABLE_KEY) { 828 struct wsm_remove_key wsm_key = { 829 .index = key->hw_key_idx, 830 }; 831 832 if (wsm_key.index > WSM_KEY_MAX_INDEX) { 833 ret = -EINVAL; 834 goto finally; 835 } 836 837 cw1200_free_key(priv, wsm_key.index); 838 ret = wsm_remove_key(priv, &wsm_key); 839 } else { 840 pr_warn("Unhandled key command %d\n", cmd); 841 } 842 843finally: 844 mutex_unlock(&priv->conf_mutex); 845 return ret; 846} 847 848void cw1200_wep_key_work(struct work_struct *work) 849{ 850 struct cw1200_common *priv = 851 container_of(work, struct cw1200_common, wep_key_work); 852 u8 queue_id = cw1200_queue_get_queue_id(priv->pending_frame_id); 853 struct cw1200_queue *queue = &priv->tx_queue[queue_id]; 854 __le32 wep_default_key_id = __cpu_to_le32( 855 priv->wep_default_key_id); 856 857 pr_debug("[STA] Setting default WEP key: %d\n", 858 priv->wep_default_key_id); 859 wsm_flush_tx(priv); 860 wsm_write_mib(priv, WSM_MIB_ID_DOT11_WEP_DEFAULT_KEY_ID, 861 &wep_default_key_id, sizeof(wep_default_key_id)); 862 cw1200_queue_requeue(queue, priv->pending_frame_id); 863 wsm_unlock_tx(priv); 864} 865 866int cw1200_set_rts_threshold(struct ieee80211_hw *hw, u32 value) 867{ 868 int ret = 0; 869 __le32 val32; 870 struct cw1200_common *priv = hw->priv; 871 872 if (priv->mode == NL80211_IFTYPE_UNSPECIFIED) 873 return 0; 874 875 if (value != (u32) -1) 876 val32 = __cpu_to_le32(value); 877 else 878 val32 = 0; /* disabled */ 879 880 if (priv->mode == NL80211_IFTYPE_UNSPECIFIED) { 881 /* device is down, can _not_ set threshold */ 882 ret = -ENODEV; 883 goto out; 884 } 885 886 if (priv->rts_threshold == value) 887 goto out; 888 889 pr_debug("[STA] Setting RTS threshold: %d\n", 890 priv->rts_threshold); 891 892 /* mutex_lock(&priv->conf_mutex); */ 893 ret = wsm_write_mib(priv, WSM_MIB_ID_DOT11_RTS_THRESHOLD, 894 &val32, sizeof(val32)); 895 if (!ret) 896 priv->rts_threshold = value; 897 /* mutex_unlock(&priv->conf_mutex); */ 898 899out: 900 return ret; 901} 902 903/* If successful, LOCKS the TX queue! */ 904static int __cw1200_flush(struct cw1200_common *priv, bool drop) 905{ 906 int i, ret; 907 908 for (;;) { 909 /* TODO: correct flush handling is required when dev_stop. 910 * Temporary workaround: 2s 911 */ 912 if (drop) { 913 for (i = 0; i < 4; ++i) 914 cw1200_queue_clear(&priv->tx_queue[i]); 915 } else { 916 ret = wait_event_timeout( 917 priv->tx_queue_stats.wait_link_id_empty, 918 cw1200_queue_stats_is_empty( 919 &priv->tx_queue_stats, -1), 920 2 * HZ); 921 } 922 923 if (!drop && ret <= 0) { 924 ret = -ETIMEDOUT; 925 break; 926 } else { 927 ret = 0; 928 } 929 930 wsm_lock_tx(priv); 931 if (!cw1200_queue_stats_is_empty(&priv->tx_queue_stats, -1)) { 932 /* Highly unlikely: WSM requeued frames. */ 933 wsm_unlock_tx(priv); 934 continue; 935 } 936 break; 937 } 938 return ret; 939} 940 941void cw1200_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 942 u32 queues, bool drop) 943{ 944 struct cw1200_common *priv = hw->priv; 945 946 switch (priv->mode) { 947 case NL80211_IFTYPE_MONITOR: 948 drop = true; 949 break; 950 case NL80211_IFTYPE_AP: 951 if (!priv->enable_beacon) 952 drop = true; 953 break; 954 } 955 956 if (!__cw1200_flush(priv, drop)) 957 wsm_unlock_tx(priv); 958 959 return; 960} 961 962/* ******************************************************************** */ 963/* WSM callbacks */ 964 965void cw1200_free_event_queue(struct cw1200_common *priv) 966{ 967 LIST_HEAD(list); 968 969 spin_lock(&priv->event_queue_lock); 970 list_splice_init(&priv->event_queue, &list); 971 spin_unlock(&priv->event_queue_lock); 972 973 __cw1200_free_event_queue(&list); 974} 975 976void cw1200_event_handler(struct work_struct *work) 977{ 978 struct cw1200_common *priv = 979 container_of(work, struct cw1200_common, event_handler); 980 struct cw1200_wsm_event *event; 981 LIST_HEAD(list); 982 983 spin_lock(&priv->event_queue_lock); 984 list_splice_init(&priv->event_queue, &list); 985 spin_unlock(&priv->event_queue_lock); 986 987 list_for_each_entry(event, &list, link) { 988 switch (event->evt.id) { 989 case WSM_EVENT_ERROR: 990 pr_err("Unhandled WSM Error from LMAC\n"); 991 break; 992 case WSM_EVENT_BSS_LOST: 993 pr_debug("[CQM] BSS lost.\n"); 994 cancel_work_sync(&priv->unjoin_work); 995 if (!down_trylock(&priv->scan.lock)) { 996 cw1200_cqm_bssloss_sm(priv, 1, 0, 0); 997 up(&priv->scan.lock); 998 } else { 999 /* Scan is in progress. Delay reporting. 1000 * Scan complete will trigger bss_loss_work 1001 */ 1002 priv->delayed_link_loss = 1; 1003 /* Also start a watchdog. */ 1004 queue_delayed_work(priv->workqueue, 1005 &priv->bss_loss_work, 5*HZ); 1006 } 1007 break; 1008 case WSM_EVENT_BSS_REGAINED: 1009 pr_debug("[CQM] BSS regained.\n"); 1010 cw1200_cqm_bssloss_sm(priv, 0, 0, 0); 1011 cancel_work_sync(&priv->unjoin_work); 1012 break; 1013 case WSM_EVENT_RADAR_DETECTED: 1014 wiphy_info(priv->hw->wiphy, "radar pulse detected\n"); 1015 break; 1016 case WSM_EVENT_RCPI_RSSI: 1017 { 1018 /* RSSI: signed Q8.0, RCPI: unsigned Q7.1 1019 * RSSI = RCPI / 2 - 110 1020 */ 1021 int rcpi_rssi = (int)(event->evt.data & 0xFF); 1022 int cqm_evt; 1023 if (priv->cqm_use_rssi) 1024 rcpi_rssi = (s8)rcpi_rssi; 1025 else 1026 rcpi_rssi = rcpi_rssi / 2 - 110; 1027 1028 cqm_evt = (rcpi_rssi <= priv->cqm_rssi_thold) ? 1029 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW : 1030 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH; 1031 pr_debug("[CQM] RSSI event: %d.\n", rcpi_rssi); 1032 ieee80211_cqm_rssi_notify(priv->vif, cqm_evt, 1033 GFP_KERNEL); 1034 break; 1035 } 1036 case WSM_EVENT_BT_INACTIVE: 1037 pr_warn("Unhandled BT INACTIVE from LMAC\n"); 1038 break; 1039 case WSM_EVENT_BT_ACTIVE: 1040 pr_warn("Unhandled BT ACTIVE from LMAC\n"); 1041 break; 1042 } 1043 } 1044 __cw1200_free_event_queue(&list); 1045} 1046 1047void cw1200_bss_loss_work(struct work_struct *work) 1048{ 1049 struct cw1200_common *priv = 1050 container_of(work, struct cw1200_common, bss_loss_work.work); 1051 1052 pr_debug("[CQM] Reporting connection loss.\n"); 1053 wsm_lock_tx(priv); 1054 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0) 1055 wsm_unlock_tx(priv); 1056} 1057 1058void cw1200_bss_params_work(struct work_struct *work) 1059{ 1060 struct cw1200_common *priv = 1061 container_of(work, struct cw1200_common, bss_params_work); 1062 mutex_lock(&priv->conf_mutex); 1063 1064 priv->bss_params.reset_beacon_loss = 1; 1065 wsm_set_bss_params(priv, &priv->bss_params); 1066 priv->bss_params.reset_beacon_loss = 0; 1067 1068 mutex_unlock(&priv->conf_mutex); 1069} 1070 1071/* ******************************************************************** */ 1072/* Internal API */ 1073 1074/* This function is called to Parse the SDD file 1075 * to extract listen_interval and PTA related information 1076 * sdd is a TLV: u8 id, u8 len, u8 data[] 1077 */ 1078static int cw1200_parse_sdd_file(struct cw1200_common *priv) 1079{ 1080 const u8 *p = priv->sdd->data; 1081 int ret = 0; 1082 1083 while (p + 2 <= priv->sdd->data + priv->sdd->size) { 1084 if (p + p[1] + 2 > priv->sdd->data + priv->sdd->size) { 1085 pr_warn("Malformed sdd structure\n"); 1086 return -1; 1087 } 1088 switch (p[0]) { 1089 case SDD_PTA_CFG_ELT_ID: { 1090 u16 v; 1091 if (p[1] < 4) { 1092 pr_warn("SDD_PTA_CFG_ELT_ID malformed\n"); 1093 ret = -1; 1094 break; 1095 } 1096 v = le16_to_cpu(*((__le16 *)(p + 2))); 1097 if (!v) /* non-zero means this is enabled */ 1098 break; 1099 1100 v = le16_to_cpu(*((__le16 *)(p + 4))); 1101 priv->conf_listen_interval = (v >> 7) & 0x1F; 1102 pr_debug("PTA found; Listen Interval %d\n", 1103 priv->conf_listen_interval); 1104 break; 1105 } 1106 case SDD_REFERENCE_FREQUENCY_ELT_ID: { 1107 u16 clk = le16_to_cpu(*((__le16 *)(p + 2))); 1108 if (clk != priv->hw_refclk) 1109 pr_warn("SDD file doesn't match configured refclk (%d vs %d)\n", 1110 clk, priv->hw_refclk); 1111 break; 1112 } 1113 default: 1114 break; 1115 } 1116 p += p[1] + 2; 1117 } 1118 1119 if (!priv->bt_present) { 1120 pr_debug("PTA element NOT found.\n"); 1121 priv->conf_listen_interval = 0; 1122 } 1123 return ret; 1124} 1125 1126int cw1200_setup_mac(struct cw1200_common *priv) 1127{ 1128 int ret = 0; 1129 1130 /* NOTE: There is a bug in FW: it reports signal 1131 * as RSSI if RSSI subscription is enabled. 1132 * It's not enough to set WSM_RCPI_RSSI_USE_RSSI. 1133 * 1134 * NOTE2: RSSI based reports have been switched to RCPI, since 1135 * FW has a bug and RSSI reported values are not stable, 1136 * what can leads to signal level oscilations in user-end applications 1137 */ 1138 struct wsm_rcpi_rssi_threshold threshold = { 1139 .rssiRcpiMode = WSM_RCPI_RSSI_THRESHOLD_ENABLE | 1140 WSM_RCPI_RSSI_DONT_USE_UPPER | 1141 WSM_RCPI_RSSI_DONT_USE_LOWER, 1142 .rollingAverageCount = 16, 1143 }; 1144 1145 struct wsm_configuration cfg = { 1146 .dot11StationId = &priv->mac_addr[0], 1147 }; 1148 1149 /* Remember the decission here to make sure, we will handle 1150 * the RCPI/RSSI value correctly on WSM_EVENT_RCPI_RSS 1151 */ 1152 if (threshold.rssiRcpiMode & WSM_RCPI_RSSI_USE_RSSI) 1153 priv->cqm_use_rssi = true; 1154 1155 if (!priv->sdd) { 1156 ret = request_firmware(&priv->sdd, priv->sdd_path, priv->pdev); 1157 if (ret) { 1158 pr_err("Can't load sdd file %s.\n", priv->sdd_path); 1159 return ret; 1160 } 1161 cw1200_parse_sdd_file(priv); 1162 } 1163 1164 cfg.dpdData = priv->sdd->data; 1165 cfg.dpdData_size = priv->sdd->size; 1166 ret = wsm_configuration(priv, &cfg); 1167 if (ret) 1168 return ret; 1169 1170 /* Configure RSSI/SCPI reporting as RSSI. */ 1171 wsm_set_rcpi_rssi_threshold(priv, &threshold); 1172 1173 return 0; 1174} 1175 1176static void cw1200_join_complete(struct cw1200_common *priv) 1177{ 1178 pr_debug("[STA] Join complete (%d)\n", priv->join_complete_status); 1179 1180 priv->join_pending = false; 1181 if (priv->join_complete_status) { 1182 priv->join_status = CW1200_JOIN_STATUS_PASSIVE; 1183 cw1200_update_listening(priv, priv->listening); 1184 cw1200_do_unjoin(priv); 1185 ieee80211_connection_loss(priv->vif); 1186 } else { 1187 if (priv->mode == NL80211_IFTYPE_ADHOC) 1188 priv->join_status = CW1200_JOIN_STATUS_IBSS; 1189 else 1190 priv->join_status = CW1200_JOIN_STATUS_PRE_STA; 1191 } 1192 wsm_unlock_tx(priv); /* Clearing the lock held before do_join() */ 1193} 1194 1195void cw1200_join_complete_work(struct work_struct *work) 1196{ 1197 struct cw1200_common *priv = 1198 container_of(work, struct cw1200_common, join_complete_work); 1199 mutex_lock(&priv->conf_mutex); 1200 cw1200_join_complete(priv); 1201 mutex_unlock(&priv->conf_mutex); 1202} 1203 1204void cw1200_join_complete_cb(struct cw1200_common *priv, 1205 struct wsm_join_complete *arg) 1206{ 1207 pr_debug("[STA] cw1200_join_complete_cb called, status=%d.\n", 1208 arg->status); 1209 1210 if (cancel_delayed_work(&priv->join_timeout)) { 1211 priv->join_complete_status = arg->status; 1212 queue_work(priv->workqueue, &priv->join_complete_work); 1213 } 1214} 1215 1216/* MUST be called with tx_lock held! It will be unlocked for us. */ 1217static void cw1200_do_join(struct cw1200_common *priv) 1218{ 1219 const u8 *bssid; 1220 struct ieee80211_bss_conf *conf = &priv->vif->bss_conf; 1221 struct cfg80211_bss *bss = NULL; 1222 struct wsm_protected_mgmt_policy mgmt_policy; 1223 struct wsm_join join = { 1224 .mode = conf->ibss_joined ? 1225 WSM_JOIN_MODE_IBSS : WSM_JOIN_MODE_BSS, 1226 .preamble_type = WSM_JOIN_PREAMBLE_LONG, 1227 .probe_for_join = 1, 1228 .atim_window = 0, 1229 .basic_rate_set = cw1200_rate_mask_to_wsm(priv, 1230 conf->basic_rates), 1231 }; 1232 if (delayed_work_pending(&priv->join_timeout)) { 1233 pr_warn("[STA] - Join request already pending, skipping..\n"); 1234 wsm_unlock_tx(priv); 1235 return; 1236 } 1237 1238 if (priv->join_status) 1239 cw1200_do_unjoin(priv); 1240 1241 bssid = priv->vif->bss_conf.bssid; 1242 1243 bss = cfg80211_get_bss(priv->hw->wiphy, priv->channel, bssid, NULL, 0, 1244 IEEE80211_BSS_TYPE_ANY, IEEE80211_PRIVACY_ANY); 1245 1246 if (!bss && !conf->ibss_joined) { 1247 wsm_unlock_tx(priv); 1248 return; 1249 } 1250 1251 mutex_lock(&priv->conf_mutex); 1252 1253 /* Under the conf lock: check scan status and 1254 * bail out if it is in progress. 1255 */ 1256 if (atomic_read(&priv->scan.in_progress)) { 1257 wsm_unlock_tx(priv); 1258 goto done_put; 1259 } 1260 1261 priv->join_pending = true; 1262 1263 /* Sanity check basic rates */ 1264 if (!join.basic_rate_set) 1265 join.basic_rate_set = 7; 1266 1267 /* Sanity check beacon interval */ 1268 if (!priv->beacon_int) 1269 priv->beacon_int = 1; 1270 1271 join.beacon_interval = priv->beacon_int; 1272 1273 /* BT Coex related changes */ 1274 if (priv->bt_present) { 1275 if (((priv->conf_listen_interval * 100) % 1276 priv->beacon_int) == 0) 1277 priv->listen_interval = 1278 ((priv->conf_listen_interval * 100) / 1279 priv->beacon_int); 1280 else 1281 priv->listen_interval = 1282 ((priv->conf_listen_interval * 100) / 1283 priv->beacon_int + 1); 1284 } 1285 1286 if (priv->hw->conf.ps_dtim_period) 1287 priv->join_dtim_period = priv->hw->conf.ps_dtim_period; 1288 join.dtim_period = priv->join_dtim_period; 1289 1290 join.channel_number = priv->channel->hw_value; 1291 join.band = (priv->channel->band == IEEE80211_BAND_5GHZ) ? 1292 WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G; 1293 1294 memcpy(join.bssid, bssid, sizeof(join.bssid)); 1295 1296 pr_debug("[STA] Join BSSID: %pM DTIM: %d, interval: %d\n", 1297 join.bssid, 1298 join.dtim_period, priv->beacon_int); 1299 1300 if (!conf->ibss_joined) { 1301 const u8 *ssidie; 1302 rcu_read_lock(); 1303 ssidie = ieee80211_bss_get_ie(bss, WLAN_EID_SSID); 1304 if (ssidie) { 1305 join.ssid_len = ssidie[1]; 1306 memcpy(join.ssid, &ssidie[2], join.ssid_len); 1307 } 1308 rcu_read_unlock(); 1309 } 1310 1311 if (priv->vif->p2p) { 1312 join.flags |= WSM_JOIN_FLAGS_P2P_GO; 1313 join.basic_rate_set = 1314 cw1200_rate_mask_to_wsm(priv, 0xFF0); 1315 } 1316 1317 /* Enable asynchronous join calls */ 1318 if (!conf->ibss_joined) { 1319 join.flags |= WSM_JOIN_FLAGS_FORCE; 1320 join.flags |= WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND; 1321 } 1322 1323 wsm_flush_tx(priv); 1324 1325 /* Stay Awake for Join and Auth Timeouts and a bit more */ 1326 cw1200_pm_stay_awake(&priv->pm_state, 1327 CW1200_JOIN_TIMEOUT + CW1200_AUTH_TIMEOUT); 1328 1329 cw1200_update_listening(priv, false); 1330 1331 /* Turn on Block ACKs */ 1332 wsm_set_block_ack_policy(priv, priv->ba_tx_tid_mask, 1333 priv->ba_rx_tid_mask); 1334 1335 /* Set up timeout */ 1336 if (join.flags & WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND) { 1337 priv->join_status = CW1200_JOIN_STATUS_JOINING; 1338 queue_delayed_work(priv->workqueue, 1339 &priv->join_timeout, 1340 CW1200_JOIN_TIMEOUT); 1341 } 1342 1343 /* 802.11w protected mgmt frames */ 1344 mgmt_policy.protectedMgmtEnable = 0; 1345 mgmt_policy.unprotectedMgmtFramesAllowed = 1; 1346 mgmt_policy.encryptionForAuthFrame = 1; 1347 wsm_set_protected_mgmt_policy(priv, &mgmt_policy); 1348 1349 /* Perform actual join */ 1350 if (wsm_join(priv, &join)) { 1351 pr_err("[STA] cw1200_join_work: wsm_join failed!\n"); 1352 cancel_delayed_work_sync(&priv->join_timeout); 1353 cw1200_update_listening(priv, priv->listening); 1354 /* Tx lock still held, unjoin will clear it. */ 1355 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0) 1356 wsm_unlock_tx(priv); 1357 } else { 1358 if (!(join.flags & WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND)) 1359 cw1200_join_complete(priv); /* Will clear tx_lock */ 1360 1361 /* Upload keys */ 1362 cw1200_upload_keys(priv); 1363 1364 /* Due to beacon filtering it is possible that the 1365 * AP's beacon is not known for the mac80211 stack. 1366 * Disable filtering temporary to make sure the stack 1367 * receives at least one 1368 */ 1369 priv->disable_beacon_filter = true; 1370 } 1371 cw1200_update_filtering(priv); 1372 1373done_put: 1374 mutex_unlock(&priv->conf_mutex); 1375 if (bss) 1376 cfg80211_put_bss(priv->hw->wiphy, bss); 1377} 1378 1379void cw1200_join_timeout(struct work_struct *work) 1380{ 1381 struct cw1200_common *priv = 1382 container_of(work, struct cw1200_common, join_timeout.work); 1383 pr_debug("[WSM] Join timed out.\n"); 1384 wsm_lock_tx(priv); 1385 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0) 1386 wsm_unlock_tx(priv); 1387} 1388 1389static void cw1200_do_unjoin(struct cw1200_common *priv) 1390{ 1391 struct wsm_reset reset = { 1392 .reset_statistics = true, 1393 }; 1394 1395 cancel_delayed_work_sync(&priv->join_timeout); 1396 1397 mutex_lock(&priv->conf_mutex); 1398 priv->join_pending = false; 1399 1400 if (atomic_read(&priv->scan.in_progress)) { 1401 if (priv->delayed_unjoin) 1402 wiphy_dbg(priv->hw->wiphy, "Delayed unjoin is already scheduled.\n"); 1403 else 1404 priv->delayed_unjoin = true; 1405 goto done; 1406 } 1407 1408 priv->delayed_link_loss = false; 1409 1410 if (!priv->join_status) 1411 goto done; 1412 1413 if (priv->join_status == CW1200_JOIN_STATUS_AP) 1414 goto done; 1415 1416 cancel_work_sync(&priv->update_filtering_work); 1417 cancel_work_sync(&priv->set_beacon_wakeup_period_work); 1418 priv->join_status = CW1200_JOIN_STATUS_PASSIVE; 1419 1420 /* Unjoin is a reset. */ 1421 wsm_flush_tx(priv); 1422 wsm_keep_alive_period(priv, 0); 1423 wsm_reset(priv, &reset); 1424 wsm_set_output_power(priv, priv->output_power * 10); 1425 priv->join_dtim_period = 0; 1426 cw1200_setup_mac(priv); 1427 cw1200_free_event_queue(priv); 1428 cancel_work_sync(&priv->event_handler); 1429 cw1200_update_listening(priv, priv->listening); 1430 cw1200_cqm_bssloss_sm(priv, 0, 0, 0); 1431 1432 /* Disable Block ACKs */ 1433 wsm_set_block_ack_policy(priv, 0, 0); 1434 1435 priv->disable_beacon_filter = false; 1436 cw1200_update_filtering(priv); 1437 memset(&priv->association_mode, 0, 1438 sizeof(priv->association_mode)); 1439 memset(&priv->bss_params, 0, sizeof(priv->bss_params)); 1440 priv->setbssparams_done = false; 1441 memset(&priv->firmware_ps_mode, 0, 1442 sizeof(priv->firmware_ps_mode)); 1443 1444 pr_debug("[STA] Unjoin completed.\n"); 1445 1446done: 1447 mutex_unlock(&priv->conf_mutex); 1448} 1449 1450void cw1200_unjoin_work(struct work_struct *work) 1451{ 1452 struct cw1200_common *priv = 1453 container_of(work, struct cw1200_common, unjoin_work); 1454 1455 cw1200_do_unjoin(priv); 1456 1457 /* Tell the stack we're dead */ 1458 ieee80211_connection_loss(priv->vif); 1459 1460 wsm_unlock_tx(priv); 1461} 1462 1463int cw1200_enable_listening(struct cw1200_common *priv) 1464{ 1465 struct wsm_start start = { 1466 .mode = WSM_START_MODE_P2P_DEV, 1467 .band = WSM_PHY_BAND_2_4G, 1468 .beacon_interval = 100, 1469 .dtim_period = 1, 1470 .probe_delay = 0, 1471 .basic_rate_set = 0x0F, 1472 }; 1473 1474 if (priv->channel) { 1475 start.band = priv->channel->band == IEEE80211_BAND_5GHZ ? 1476 WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G; 1477 start.channel_number = priv->channel->hw_value; 1478 } else { 1479 start.band = WSM_PHY_BAND_2_4G; 1480 start.channel_number = 1; 1481 } 1482 1483 return wsm_start(priv, &start); 1484} 1485 1486int cw1200_disable_listening(struct cw1200_common *priv) 1487{ 1488 int ret; 1489 struct wsm_reset reset = { 1490 .reset_statistics = true, 1491 }; 1492 ret = wsm_reset(priv, &reset); 1493 return ret; 1494} 1495 1496void cw1200_update_listening(struct cw1200_common *priv, bool enabled) 1497{ 1498 if (enabled) { 1499 if (priv->join_status == CW1200_JOIN_STATUS_PASSIVE) { 1500 if (!cw1200_enable_listening(priv)) 1501 priv->join_status = CW1200_JOIN_STATUS_MONITOR; 1502 wsm_set_probe_responder(priv, true); 1503 } 1504 } else { 1505 if (priv->join_status == CW1200_JOIN_STATUS_MONITOR) { 1506 if (!cw1200_disable_listening(priv)) 1507 priv->join_status = CW1200_JOIN_STATUS_PASSIVE; 1508 wsm_set_probe_responder(priv, false); 1509 } 1510 } 1511} 1512 1513int cw1200_set_uapsd_param(struct cw1200_common *priv, 1514 const struct wsm_edca_params *arg) 1515{ 1516 int ret; 1517 u16 uapsd_flags = 0; 1518 1519 /* Here's the mapping AC [queue, bit] 1520 * VO [0,3], VI [1, 2], BE [2, 1], BK [3, 0] 1521 */ 1522 1523 if (arg->uapsd_enable[0]) 1524 uapsd_flags |= 1 << 3; 1525 1526 if (arg->uapsd_enable[1]) 1527 uapsd_flags |= 1 << 2; 1528 1529 if (arg->uapsd_enable[2]) 1530 uapsd_flags |= 1 << 1; 1531 1532 if (arg->uapsd_enable[3]) 1533 uapsd_flags |= 1; 1534 1535 /* Currently pseudo U-APSD operation is not supported, so setting 1536 * MinAutoTriggerInterval, MaxAutoTriggerInterval and 1537 * AutoTriggerStep to 0 1538 */ 1539 1540 priv->uapsd_info.uapsd_flags = cpu_to_le16(uapsd_flags); 1541 priv->uapsd_info.min_auto_trigger_interval = 0; 1542 priv->uapsd_info.max_auto_trigger_interval = 0; 1543 priv->uapsd_info.auto_trigger_step = 0; 1544 1545 ret = wsm_set_uapsd_info(priv, &priv->uapsd_info); 1546 return ret; 1547} 1548 1549/* ******************************************************************** */ 1550/* AP API */ 1551 1552int cw1200_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1553 struct ieee80211_sta *sta) 1554{ 1555 struct cw1200_common *priv = hw->priv; 1556 struct cw1200_sta_priv *sta_priv = 1557 (struct cw1200_sta_priv *)&sta->drv_priv; 1558 struct cw1200_link_entry *entry; 1559 struct sk_buff *skb; 1560 1561 if (priv->mode != NL80211_IFTYPE_AP) 1562 return 0; 1563 1564 sta_priv->link_id = cw1200_find_link_id(priv, sta->addr); 1565 if (WARN_ON(!sta_priv->link_id)) { 1566 wiphy_info(priv->hw->wiphy, 1567 "[AP] No more link IDs available.\n"); 1568 return -ENOENT; 1569 } 1570 1571 entry = &priv->link_id_db[sta_priv->link_id - 1]; 1572 spin_lock_bh(&priv->ps_state_lock); 1573 if ((sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK) == 1574 IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK) 1575 priv->sta_asleep_mask |= BIT(sta_priv->link_id); 1576 entry->status = CW1200_LINK_HARD; 1577 while ((skb = skb_dequeue(&entry->rx_queue))) 1578 ieee80211_rx_irqsafe(priv->hw, skb); 1579 spin_unlock_bh(&priv->ps_state_lock); 1580 return 0; 1581} 1582 1583int cw1200_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1584 struct ieee80211_sta *sta) 1585{ 1586 struct cw1200_common *priv = hw->priv; 1587 struct cw1200_sta_priv *sta_priv = 1588 (struct cw1200_sta_priv *)&sta->drv_priv; 1589 struct cw1200_link_entry *entry; 1590 1591 if (priv->mode != NL80211_IFTYPE_AP || !sta_priv->link_id) 1592 return 0; 1593 1594 entry = &priv->link_id_db[sta_priv->link_id - 1]; 1595 spin_lock_bh(&priv->ps_state_lock); 1596 entry->status = CW1200_LINK_RESERVE; 1597 entry->timestamp = jiffies; 1598 wsm_lock_tx_async(priv); 1599 if (queue_work(priv->workqueue, &priv->link_id_work) <= 0) 1600 wsm_unlock_tx(priv); 1601 spin_unlock_bh(&priv->ps_state_lock); 1602 flush_workqueue(priv->workqueue); 1603 return 0; 1604} 1605 1606static void __cw1200_sta_notify(struct ieee80211_hw *dev, 1607 struct ieee80211_vif *vif, 1608 enum sta_notify_cmd notify_cmd, 1609 int link_id) 1610{ 1611 struct cw1200_common *priv = dev->priv; 1612 u32 bit, prev; 1613 1614 /* Zero link id means "for all link IDs" */ 1615 if (link_id) 1616 bit = BIT(link_id); 1617 else if (WARN_ON_ONCE(notify_cmd != STA_NOTIFY_AWAKE)) 1618 bit = 0; 1619 else 1620 bit = priv->link_id_map; 1621 prev = priv->sta_asleep_mask & bit; 1622 1623 switch (notify_cmd) { 1624 case STA_NOTIFY_SLEEP: 1625 if (!prev) { 1626 if (priv->buffered_multicasts && 1627 !priv->sta_asleep_mask) 1628 queue_work(priv->workqueue, 1629 &priv->multicast_start_work); 1630 priv->sta_asleep_mask |= bit; 1631 } 1632 break; 1633 case STA_NOTIFY_AWAKE: 1634 if (prev) { 1635 priv->sta_asleep_mask &= ~bit; 1636 priv->pspoll_mask &= ~bit; 1637 if (priv->tx_multicast && link_id && 1638 !priv->sta_asleep_mask) 1639 queue_work(priv->workqueue, 1640 &priv->multicast_stop_work); 1641 cw1200_bh_wakeup(priv); 1642 } 1643 break; 1644 } 1645} 1646 1647void cw1200_sta_notify(struct ieee80211_hw *dev, 1648 struct ieee80211_vif *vif, 1649 enum sta_notify_cmd notify_cmd, 1650 struct ieee80211_sta *sta) 1651{ 1652 struct cw1200_common *priv = dev->priv; 1653 struct cw1200_sta_priv *sta_priv = 1654 (struct cw1200_sta_priv *)&sta->drv_priv; 1655 1656 spin_lock_bh(&priv->ps_state_lock); 1657 __cw1200_sta_notify(dev, vif, notify_cmd, sta_priv->link_id); 1658 spin_unlock_bh(&priv->ps_state_lock); 1659} 1660 1661static void cw1200_ps_notify(struct cw1200_common *priv, 1662 int link_id, bool ps) 1663{ 1664 if (link_id > CW1200_MAX_STA_IN_AP_MODE) 1665 return; 1666 1667 pr_debug("%s for LinkId: %d. STAs asleep: %.8X\n", 1668 ps ? "Stop" : "Start", 1669 link_id, priv->sta_asleep_mask); 1670 1671 __cw1200_sta_notify(priv->hw, priv->vif, 1672 ps ? STA_NOTIFY_SLEEP : STA_NOTIFY_AWAKE, link_id); 1673} 1674 1675static int cw1200_set_tim_impl(struct cw1200_common *priv, bool aid0_bit_set) 1676{ 1677 struct sk_buff *skb; 1678 struct wsm_update_ie update_ie = { 1679 .what = WSM_UPDATE_IE_BEACON, 1680 .count = 1, 1681 }; 1682 u16 tim_offset, tim_length; 1683 1684 pr_debug("[AP] mcast: %s.\n", aid0_bit_set ? "ena" : "dis"); 1685 1686 skb = ieee80211_beacon_get_tim(priv->hw, priv->vif, 1687 &tim_offset, &tim_length); 1688 if (!skb) { 1689 if (!__cw1200_flush(priv, true)) 1690 wsm_unlock_tx(priv); 1691 return -ENOENT; 1692 } 1693 1694 if (tim_offset && tim_length >= 6) { 1695 /* Ignore DTIM count from mac80211: 1696 * firmware handles DTIM internally. 1697 */ 1698 skb->data[tim_offset + 2] = 0; 1699 1700 /* Set/reset aid0 bit */ 1701 if (aid0_bit_set) 1702 skb->data[tim_offset + 4] |= 1; 1703 else 1704 skb->data[tim_offset + 4] &= ~1; 1705 } 1706 1707 update_ie.ies = &skb->data[tim_offset]; 1708 update_ie.length = tim_length; 1709 wsm_update_ie(priv, &update_ie); 1710 1711 dev_kfree_skb(skb); 1712 1713 return 0; 1714} 1715 1716void cw1200_set_tim_work(struct work_struct *work) 1717{ 1718 struct cw1200_common *priv = 1719 container_of(work, struct cw1200_common, set_tim_work); 1720 (void)cw1200_set_tim_impl(priv, priv->aid0_bit_set); 1721} 1722 1723int cw1200_set_tim(struct ieee80211_hw *dev, struct ieee80211_sta *sta, 1724 bool set) 1725{ 1726 struct cw1200_common *priv = dev->priv; 1727 queue_work(priv->workqueue, &priv->set_tim_work); 1728 return 0; 1729} 1730 1731void cw1200_set_cts_work(struct work_struct *work) 1732{ 1733 struct cw1200_common *priv = 1734 container_of(work, struct cw1200_common, set_cts_work); 1735 1736 u8 erp_ie[3] = {WLAN_EID_ERP_INFO, 0x1, 0}; 1737 struct wsm_update_ie update_ie = { 1738 .what = WSM_UPDATE_IE_BEACON, 1739 .count = 1, 1740 .ies = erp_ie, 1741 .length = 3, 1742 }; 1743 u32 erp_info; 1744 __le32 use_cts_prot; 1745 mutex_lock(&priv->conf_mutex); 1746 erp_info = priv->erp_info; 1747 mutex_unlock(&priv->conf_mutex); 1748 use_cts_prot = 1749 erp_info & WLAN_ERP_USE_PROTECTION ? 1750 __cpu_to_le32(1) : 0; 1751 1752 erp_ie[ERP_INFO_BYTE_OFFSET] = erp_info; 1753 1754 pr_debug("[STA] ERP information 0x%x\n", erp_info); 1755 1756 wsm_write_mib(priv, WSM_MIB_ID_NON_ERP_PROTECTION, 1757 &use_cts_prot, sizeof(use_cts_prot)); 1758 wsm_update_ie(priv, &update_ie); 1759 1760 return; 1761} 1762 1763static int cw1200_set_btcoexinfo(struct cw1200_common *priv) 1764{ 1765 struct wsm_override_internal_txrate arg; 1766 int ret = 0; 1767 1768 if (priv->mode == NL80211_IFTYPE_STATION) { 1769 /* Plumb PSPOLL and NULL template */ 1770 cw1200_upload_pspoll(priv); 1771 cw1200_upload_null(priv); 1772 cw1200_upload_qosnull(priv); 1773 } else { 1774 return 0; 1775 } 1776 1777 memset(&arg, 0, sizeof(struct wsm_override_internal_txrate)); 1778 1779 if (!priv->vif->p2p) { 1780 /* STATION mode */ 1781 if (priv->bss_params.operational_rate_set & ~0xF) { 1782 pr_debug("[STA] STA has ERP rates\n"); 1783 /* G or BG mode */ 1784 arg.internalTxRate = (__ffs( 1785 priv->bss_params.operational_rate_set & ~0xF)); 1786 } else { 1787 pr_debug("[STA] STA has non ERP rates\n"); 1788 /* B only mode */ 1789 arg.internalTxRate = (__ffs(le32_to_cpu(priv->association_mode.basic_rate_set))); 1790 } 1791 arg.nonErpInternalTxRate = (__ffs(le32_to_cpu(priv->association_mode.basic_rate_set))); 1792 } else { 1793 /* P2P mode */ 1794 arg.internalTxRate = (__ffs(priv->bss_params.operational_rate_set & ~0xF)); 1795 arg.nonErpInternalTxRate = (__ffs(priv->bss_params.operational_rate_set & ~0xF)); 1796 } 1797 1798 pr_debug("[STA] BTCOEX_INFO MODE %d, internalTxRate : %x, nonErpInternalTxRate: %x\n", 1799 priv->mode, 1800 arg.internalTxRate, 1801 arg.nonErpInternalTxRate); 1802 1803 ret = wsm_write_mib(priv, WSM_MIB_ID_OVERRIDE_INTERNAL_TX_RATE, 1804 &arg, sizeof(arg)); 1805 1806 return ret; 1807} 1808 1809void cw1200_bss_info_changed(struct ieee80211_hw *dev, 1810 struct ieee80211_vif *vif, 1811 struct ieee80211_bss_conf *info, 1812 u32 changed) 1813{ 1814 struct cw1200_common *priv = dev->priv; 1815 bool do_join = false; 1816 1817 mutex_lock(&priv->conf_mutex); 1818 1819 pr_debug("BSS CHANGED: %08x\n", changed); 1820 1821 /* TODO: BSS_CHANGED_QOS */ 1822 /* TODO: BSS_CHANGED_TXPOWER */ 1823 1824 if (changed & BSS_CHANGED_ARP_FILTER) { 1825 struct wsm_mib_arp_ipv4_filter filter = {0}; 1826 int i; 1827 1828 pr_debug("[STA] BSS_CHANGED_ARP_FILTER cnt: %d\n", 1829 info->arp_addr_cnt); 1830 1831 /* Currently only one IP address is supported by firmware. 1832 * In case of more IPs arp filtering will be disabled. 1833 */ 1834 if (info->arp_addr_cnt > 0 && 1835 info->arp_addr_cnt <= WSM_MAX_ARP_IP_ADDRTABLE_ENTRIES) { 1836 for (i = 0; i < info->arp_addr_cnt; i++) { 1837 filter.ipv4addrs[i] = info->arp_addr_list[i]; 1838 pr_debug("[STA] addr[%d]: 0x%X\n", 1839 i, filter.ipv4addrs[i]); 1840 } 1841 filter.enable = __cpu_to_le32(1); 1842 } 1843 1844 pr_debug("[STA] arp ip filter enable: %d\n", 1845 __le32_to_cpu(filter.enable)); 1846 1847 wsm_set_arp_ipv4_filter(priv, &filter); 1848 } 1849 1850 if (changed & 1851 (BSS_CHANGED_BEACON | 1852 BSS_CHANGED_AP_PROBE_RESP | 1853 BSS_CHANGED_BSSID | 1854 BSS_CHANGED_SSID | 1855 BSS_CHANGED_IBSS)) { 1856 pr_debug("BSS_CHANGED_BEACON\n"); 1857 priv->beacon_int = info->beacon_int; 1858 cw1200_update_beaconing(priv); 1859 cw1200_upload_beacon(priv); 1860 } 1861 1862 if (changed & BSS_CHANGED_BEACON_ENABLED) { 1863 pr_debug("BSS_CHANGED_BEACON_ENABLED (%d)\n", info->enable_beacon); 1864 1865 if (priv->enable_beacon != info->enable_beacon) { 1866 cw1200_enable_beaconing(priv, info->enable_beacon); 1867 priv->enable_beacon = info->enable_beacon; 1868 } 1869 } 1870 1871 if (changed & BSS_CHANGED_BEACON_INT) { 1872 pr_debug("CHANGED_BEACON_INT\n"); 1873 if (info->ibss_joined) 1874 do_join = true; 1875 else if (priv->join_status == CW1200_JOIN_STATUS_AP) 1876 cw1200_update_beaconing(priv); 1877 } 1878 1879 /* assoc/disassoc, or maybe AID changed */ 1880 if (changed & BSS_CHANGED_ASSOC) { 1881 wsm_lock_tx(priv); 1882 priv->wep_default_key_id = -1; 1883 wsm_unlock_tx(priv); 1884 } 1885 1886 if (changed & BSS_CHANGED_BSSID) { 1887 pr_debug("BSS_CHANGED_BSSID\n"); 1888 do_join = true; 1889 } 1890 1891 if (changed & 1892 (BSS_CHANGED_ASSOC | 1893 BSS_CHANGED_BSSID | 1894 BSS_CHANGED_IBSS | 1895 BSS_CHANGED_BASIC_RATES | 1896 BSS_CHANGED_HT)) { 1897 pr_debug("BSS_CHANGED_ASSOC\n"); 1898 if (info->assoc) { 1899 if (priv->join_status < CW1200_JOIN_STATUS_PRE_STA) { 1900 ieee80211_connection_loss(vif); 1901 mutex_unlock(&priv->conf_mutex); 1902 return; 1903 } else if (priv->join_status == CW1200_JOIN_STATUS_PRE_STA) { 1904 priv->join_status = CW1200_JOIN_STATUS_STA; 1905 } 1906 } else { 1907 do_join = true; 1908 } 1909 1910 if (info->assoc || info->ibss_joined) { 1911 struct ieee80211_sta *sta = NULL; 1912 __le32 htprot = 0; 1913 1914 if (info->dtim_period) 1915 priv->join_dtim_period = info->dtim_period; 1916 priv->beacon_int = info->beacon_int; 1917 1918 rcu_read_lock(); 1919 1920 if (info->bssid && !info->ibss_joined) 1921 sta = ieee80211_find_sta(vif, info->bssid); 1922 if (sta) { 1923 priv->ht_info.ht_cap = sta->ht_cap; 1924 priv->bss_params.operational_rate_set = 1925 cw1200_rate_mask_to_wsm(priv, 1926 sta->supp_rates[priv->channel->band]); 1927 priv->ht_info.channel_type = cfg80211_get_chandef_type(&dev->conf.chandef); 1928 priv->ht_info.operation_mode = info->ht_operation_mode; 1929 } else { 1930 memset(&priv->ht_info, 0, 1931 sizeof(priv->ht_info)); 1932 priv->bss_params.operational_rate_set = -1; 1933 } 1934 rcu_read_unlock(); 1935 1936 /* Non Greenfield stations present */ 1937 if (priv->ht_info.operation_mode & 1938 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT) 1939 htprot |= cpu_to_le32(WSM_NON_GREENFIELD_STA_PRESENT); 1940 1941 /* Set HT protection method */ 1942 htprot |= cpu_to_le32((priv->ht_info.operation_mode & IEEE80211_HT_OP_MODE_PROTECTION) << 2); 1943 1944 /* TODO: 1945 * STBC_param.dual_cts 1946 * STBC_param.LSIG_TXOP_FILL 1947 */ 1948 1949 wsm_write_mib(priv, WSM_MIB_ID_SET_HT_PROTECTION, 1950 &htprot, sizeof(htprot)); 1951 1952 priv->association_mode.greenfield = 1953 cw1200_ht_greenfield(&priv->ht_info); 1954 priv->association_mode.flags = 1955 WSM_ASSOCIATION_MODE_SNOOP_ASSOC_FRAMES | 1956 WSM_ASSOCIATION_MODE_USE_PREAMBLE_TYPE | 1957 WSM_ASSOCIATION_MODE_USE_HT_MODE | 1958 WSM_ASSOCIATION_MODE_USE_BASIC_RATE_SET | 1959 WSM_ASSOCIATION_MODE_USE_MPDU_START_SPACING; 1960 priv->association_mode.preamble = 1961 info->use_short_preamble ? 1962 WSM_JOIN_PREAMBLE_SHORT : 1963 WSM_JOIN_PREAMBLE_LONG; 1964 priv->association_mode.basic_rate_set = __cpu_to_le32( 1965 cw1200_rate_mask_to_wsm(priv, 1966 info->basic_rates)); 1967 priv->association_mode.mpdu_start_spacing = 1968 cw1200_ht_ampdu_density(&priv->ht_info); 1969 1970 cw1200_cqm_bssloss_sm(priv, 0, 0, 0); 1971 cancel_work_sync(&priv->unjoin_work); 1972 1973 priv->bss_params.beacon_lost_count = priv->cqm_beacon_loss_count; 1974 priv->bss_params.aid = info->aid; 1975 1976 if (priv->join_dtim_period < 1) 1977 priv->join_dtim_period = 1; 1978 1979 pr_debug("[STA] DTIM %d, interval: %d\n", 1980 priv->join_dtim_period, priv->beacon_int); 1981 pr_debug("[STA] Preamble: %d, Greenfield: %d, Aid: %d, Rates: 0x%.8X, Basic: 0x%.8X\n", 1982 priv->association_mode.preamble, 1983 priv->association_mode.greenfield, 1984 priv->bss_params.aid, 1985 priv->bss_params.operational_rate_set, 1986 priv->association_mode.basic_rate_set); 1987 wsm_set_association_mode(priv, &priv->association_mode); 1988 1989 if (!info->ibss_joined) { 1990 wsm_keep_alive_period(priv, 30 /* sec */); 1991 wsm_set_bss_params(priv, &priv->bss_params); 1992 priv->setbssparams_done = true; 1993 cw1200_set_beacon_wakeup_period_work(&priv->set_beacon_wakeup_period_work); 1994 cw1200_set_pm(priv, &priv->powersave_mode); 1995 } 1996 if (priv->vif->p2p) { 1997 pr_debug("[STA] Setting p2p powersave configuration.\n"); 1998 wsm_set_p2p_ps_modeinfo(priv, 1999 &priv->p2p_ps_modeinfo); 2000 } 2001 if (priv->bt_present) 2002 cw1200_set_btcoexinfo(priv); 2003 } else { 2004 memset(&priv->association_mode, 0, 2005 sizeof(priv->association_mode)); 2006 memset(&priv->bss_params, 0, sizeof(priv->bss_params)); 2007 } 2008 } 2009 2010 /* ERP Protection */ 2011 if (changed & (BSS_CHANGED_ASSOC | 2012 BSS_CHANGED_ERP_CTS_PROT | 2013 BSS_CHANGED_ERP_PREAMBLE)) { 2014 u32 prev_erp_info = priv->erp_info; 2015 if (info->use_cts_prot) 2016 priv->erp_info |= WLAN_ERP_USE_PROTECTION; 2017 else if (!(prev_erp_info & WLAN_ERP_NON_ERP_PRESENT)) 2018 priv->erp_info &= ~WLAN_ERP_USE_PROTECTION; 2019 2020 if (info->use_short_preamble) 2021 priv->erp_info |= WLAN_ERP_BARKER_PREAMBLE; 2022 else 2023 priv->erp_info &= ~WLAN_ERP_BARKER_PREAMBLE; 2024 2025 pr_debug("[STA] ERP Protection: %x\n", priv->erp_info); 2026 2027 if (prev_erp_info != priv->erp_info) 2028 queue_work(priv->workqueue, &priv->set_cts_work); 2029 } 2030 2031 /* ERP Slottime */ 2032 if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_ERP_SLOT)) { 2033 __le32 slot_time = info->use_short_slot ? 2034 __cpu_to_le32(9) : __cpu_to_le32(20); 2035 pr_debug("[STA] Slot time: %d us.\n", 2036 __le32_to_cpu(slot_time)); 2037 wsm_write_mib(priv, WSM_MIB_ID_DOT11_SLOT_TIME, 2038 &slot_time, sizeof(slot_time)); 2039 } 2040 2041 if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_CQM)) { 2042 struct wsm_rcpi_rssi_threshold threshold = { 2043 .rollingAverageCount = 8, 2044 }; 2045 pr_debug("[CQM] RSSI threshold subscribe: %d +- %d\n", 2046 info->cqm_rssi_thold, info->cqm_rssi_hyst); 2047 priv->cqm_rssi_thold = info->cqm_rssi_thold; 2048 priv->cqm_rssi_hyst = info->cqm_rssi_hyst; 2049 2050 if (info->cqm_rssi_thold || info->cqm_rssi_hyst) { 2051 /* RSSI subscription enabled */ 2052 /* TODO: It's not a correct way of setting threshold. 2053 * Upper and lower must be set equal here and adjusted 2054 * in callback. However current implementation is much 2055 * more relaible and stable. 2056 */ 2057 2058 /* RSSI: signed Q8.0, RCPI: unsigned Q7.1 2059 * RSSI = RCPI / 2 - 110 2060 */ 2061 if (priv->cqm_use_rssi) { 2062 threshold.upperThreshold = 2063 info->cqm_rssi_thold + info->cqm_rssi_hyst; 2064 threshold.lowerThreshold = 2065 info->cqm_rssi_thold; 2066 threshold.rssiRcpiMode |= WSM_RCPI_RSSI_USE_RSSI; 2067 } else { 2068 threshold.upperThreshold = (info->cqm_rssi_thold + info->cqm_rssi_hyst + 110) * 2; 2069 threshold.lowerThreshold = (info->cqm_rssi_thold + 110) * 2; 2070 } 2071 threshold.rssiRcpiMode |= WSM_RCPI_RSSI_THRESHOLD_ENABLE; 2072 } else { 2073 /* There is a bug in FW, see sta.c. We have to enable 2074 * dummy subscription to get correct RSSI values. 2075 */ 2076 threshold.rssiRcpiMode |= 2077 WSM_RCPI_RSSI_THRESHOLD_ENABLE | 2078 WSM_RCPI_RSSI_DONT_USE_UPPER | 2079 WSM_RCPI_RSSI_DONT_USE_LOWER; 2080 if (priv->cqm_use_rssi) 2081 threshold.rssiRcpiMode |= WSM_RCPI_RSSI_USE_RSSI; 2082 } 2083 wsm_set_rcpi_rssi_threshold(priv, &threshold); 2084 } 2085 mutex_unlock(&priv->conf_mutex); 2086 2087 if (do_join) { 2088 wsm_lock_tx(priv); 2089 cw1200_do_join(priv); /* Will unlock it for us */ 2090 } 2091} 2092 2093void cw1200_multicast_start_work(struct work_struct *work) 2094{ 2095 struct cw1200_common *priv = 2096 container_of(work, struct cw1200_common, multicast_start_work); 2097 long tmo = priv->join_dtim_period * 2098 (priv->beacon_int + 20) * HZ / 1024; 2099 2100 cancel_work_sync(&priv->multicast_stop_work); 2101 2102 if (!priv->aid0_bit_set) { 2103 wsm_lock_tx(priv); 2104 cw1200_set_tim_impl(priv, true); 2105 priv->aid0_bit_set = true; 2106 mod_timer(&priv->mcast_timeout, jiffies + tmo); 2107 wsm_unlock_tx(priv); 2108 } 2109} 2110 2111void cw1200_multicast_stop_work(struct work_struct *work) 2112{ 2113 struct cw1200_common *priv = 2114 container_of(work, struct cw1200_common, multicast_stop_work); 2115 2116 if (priv->aid0_bit_set) { 2117 del_timer_sync(&priv->mcast_timeout); 2118 wsm_lock_tx(priv); 2119 priv->aid0_bit_set = false; 2120 cw1200_set_tim_impl(priv, false); 2121 wsm_unlock_tx(priv); 2122 } 2123} 2124 2125void cw1200_mcast_timeout(unsigned long arg) 2126{ 2127 struct cw1200_common *priv = 2128 (struct cw1200_common *)arg; 2129 2130 wiphy_warn(priv->hw->wiphy, 2131 "Multicast delivery timeout.\n"); 2132 spin_lock_bh(&priv->ps_state_lock); 2133 priv->tx_multicast = priv->aid0_bit_set && 2134 priv->buffered_multicasts; 2135 if (priv->tx_multicast) 2136 cw1200_bh_wakeup(priv); 2137 spin_unlock_bh(&priv->ps_state_lock); 2138} 2139 2140int cw1200_ampdu_action(struct ieee80211_hw *hw, 2141 struct ieee80211_vif *vif, 2142 enum ieee80211_ampdu_mlme_action action, 2143 struct ieee80211_sta *sta, u16 tid, u16 *ssn, 2144 u8 buf_size) 2145{ 2146 /* Aggregation is implemented fully in firmware, 2147 * including block ack negotiation. Do not allow 2148 * mac80211 stack to do anything: it interferes with 2149 * the firmware. 2150 */ 2151 2152 /* Note that we still need this function stubbed. */ 2153 return -ENOTSUPP; 2154} 2155 2156/* ******************************************************************** */ 2157/* WSM callback */ 2158void cw1200_suspend_resume(struct cw1200_common *priv, 2159 struct wsm_suspend_resume *arg) 2160{ 2161 pr_debug("[AP] %s: %s\n", 2162 arg->stop ? "stop" : "start", 2163 arg->multicast ? "broadcast" : "unicast"); 2164 2165 if (arg->multicast) { 2166 bool cancel_tmo = false; 2167 spin_lock_bh(&priv->ps_state_lock); 2168 if (arg->stop) { 2169 priv->tx_multicast = false; 2170 } else { 2171 /* Firmware sends this indication every DTIM if there 2172 * is a STA in powersave connected. There is no reason 2173 * to suspend, following wakeup will consume much more 2174 * power than it could be saved. 2175 */ 2176 cw1200_pm_stay_awake(&priv->pm_state, 2177 priv->join_dtim_period * 2178 (priv->beacon_int + 20) * HZ / 1024); 2179 priv->tx_multicast = (priv->aid0_bit_set && 2180 priv->buffered_multicasts); 2181 if (priv->tx_multicast) { 2182 cancel_tmo = true; 2183 cw1200_bh_wakeup(priv); 2184 } 2185 } 2186 spin_unlock_bh(&priv->ps_state_lock); 2187 if (cancel_tmo) 2188 del_timer_sync(&priv->mcast_timeout); 2189 } else { 2190 spin_lock_bh(&priv->ps_state_lock); 2191 cw1200_ps_notify(priv, arg->link_id, arg->stop); 2192 spin_unlock_bh(&priv->ps_state_lock); 2193 if (!arg->stop) 2194 cw1200_bh_wakeup(priv); 2195 } 2196 return; 2197} 2198 2199/* ******************************************************************** */ 2200/* AP privates */ 2201 2202static int cw1200_upload_beacon(struct cw1200_common *priv) 2203{ 2204 int ret = 0; 2205 struct ieee80211_mgmt *mgmt; 2206 struct wsm_template_frame frame = { 2207 .frame_type = WSM_FRAME_TYPE_BEACON, 2208 }; 2209 2210 u16 tim_offset; 2211 u16 tim_len; 2212 2213 if (priv->mode == NL80211_IFTYPE_STATION || 2214 priv->mode == NL80211_IFTYPE_MONITOR || 2215 priv->mode == NL80211_IFTYPE_UNSPECIFIED) 2216 goto done; 2217 2218 if (priv->vif->p2p) 2219 frame.rate = WSM_TRANSMIT_RATE_6; 2220 2221 frame.skb = ieee80211_beacon_get_tim(priv->hw, priv->vif, 2222 &tim_offset, &tim_len); 2223 if (!frame.skb) 2224 return -ENOMEM; 2225 2226 ret = wsm_set_template_frame(priv, &frame); 2227 2228 if (ret) 2229 goto done; 2230 2231 /* TODO: Distill probe resp; remove TIM 2232 * and any other beacon-specific IEs 2233 */ 2234 mgmt = (void *)frame.skb->data; 2235 mgmt->frame_control = 2236 __cpu_to_le16(IEEE80211_FTYPE_MGMT | 2237 IEEE80211_STYPE_PROBE_RESP); 2238 2239 frame.frame_type = WSM_FRAME_TYPE_PROBE_RESPONSE; 2240 if (priv->vif->p2p) { 2241 ret = wsm_set_probe_responder(priv, true); 2242 } else { 2243 ret = wsm_set_template_frame(priv, &frame); 2244 wsm_set_probe_responder(priv, false); 2245 } 2246 2247done: 2248 dev_kfree_skb(frame.skb); 2249 2250 return ret; 2251} 2252 2253static int cw1200_upload_pspoll(struct cw1200_common *priv) 2254{ 2255 int ret = 0; 2256 struct wsm_template_frame frame = { 2257 .frame_type = WSM_FRAME_TYPE_PS_POLL, 2258 .rate = 0xFF, 2259 }; 2260 2261 2262 frame.skb = ieee80211_pspoll_get(priv->hw, priv->vif); 2263 if (!frame.skb) 2264 return -ENOMEM; 2265 2266 ret = wsm_set_template_frame(priv, &frame); 2267 2268 dev_kfree_skb(frame.skb); 2269 2270 return ret; 2271} 2272 2273static int cw1200_upload_null(struct cw1200_common *priv) 2274{ 2275 int ret = 0; 2276 struct wsm_template_frame frame = { 2277 .frame_type = WSM_FRAME_TYPE_NULL, 2278 .rate = 0xFF, 2279 }; 2280 2281 frame.skb = ieee80211_nullfunc_get(priv->hw, priv->vif); 2282 if (!frame.skb) 2283 return -ENOMEM; 2284 2285 ret = wsm_set_template_frame(priv, &frame); 2286 2287 dev_kfree_skb(frame.skb); 2288 2289 return ret; 2290} 2291 2292static int cw1200_upload_qosnull(struct cw1200_common *priv) 2293{ 2294 /* TODO: This needs to be implemented 2295 2296 struct wsm_template_frame frame = { 2297 .frame_type = WSM_FRAME_TYPE_QOS_NULL, 2298 .rate = 0xFF, 2299 }; 2300 2301 frame.skb = ieee80211_qosnullfunc_get(priv->hw, priv->vif); 2302 if (!frame.skb) 2303 return -ENOMEM; 2304 2305 ret = wsm_set_template_frame(priv, &frame); 2306 2307 dev_kfree_skb(frame.skb); 2308 2309 */ 2310 return 0; 2311} 2312 2313static int cw1200_enable_beaconing(struct cw1200_common *priv, 2314 bool enable) 2315{ 2316 struct wsm_beacon_transmit transmit = { 2317 .enable_beaconing = enable, 2318 }; 2319 2320 return wsm_beacon_transmit(priv, &transmit); 2321} 2322 2323static int cw1200_start_ap(struct cw1200_common *priv) 2324{ 2325 int ret; 2326 struct ieee80211_bss_conf *conf = &priv->vif->bss_conf; 2327 struct wsm_start start = { 2328 .mode = priv->vif->p2p ? 2329 WSM_START_MODE_P2P_GO : WSM_START_MODE_AP, 2330 .band = (priv->channel->band == IEEE80211_BAND_5GHZ) ? 2331 WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G, 2332 .channel_number = priv->channel->hw_value, 2333 .beacon_interval = conf->beacon_int, 2334 .dtim_period = conf->dtim_period, 2335 .preamble = conf->use_short_preamble ? 2336 WSM_JOIN_PREAMBLE_SHORT : 2337 WSM_JOIN_PREAMBLE_LONG, 2338 .probe_delay = 100, 2339 .basic_rate_set = cw1200_rate_mask_to_wsm(priv, 2340 conf->basic_rates), 2341 }; 2342 struct wsm_operational_mode mode = { 2343 .power_mode = cw1200_power_mode, 2344 .disable_more_flag_usage = true, 2345 }; 2346 2347 memset(start.ssid, 0, sizeof(start.ssid)); 2348 if (!conf->hidden_ssid) { 2349 start.ssid_len = conf->ssid_len; 2350 memcpy(start.ssid, conf->ssid, start.ssid_len); 2351 } 2352 2353 priv->beacon_int = conf->beacon_int; 2354 priv->join_dtim_period = conf->dtim_period; 2355 2356 memset(&priv->link_id_db, 0, sizeof(priv->link_id_db)); 2357 2358 pr_debug("[AP] ch: %d(%d), bcn: %d(%d), brt: 0x%.8X, ssid: %.*s.\n", 2359 start.channel_number, start.band, 2360 start.beacon_interval, start.dtim_period, 2361 start.basic_rate_set, 2362 start.ssid_len, start.ssid); 2363 ret = wsm_start(priv, &start); 2364 if (!ret) 2365 ret = cw1200_upload_keys(priv); 2366 if (!ret && priv->vif->p2p) { 2367 pr_debug("[AP] Setting p2p powersave configuration.\n"); 2368 wsm_set_p2p_ps_modeinfo(priv, &priv->p2p_ps_modeinfo); 2369 } 2370 if (!ret) { 2371 wsm_set_block_ack_policy(priv, 0, 0); 2372 priv->join_status = CW1200_JOIN_STATUS_AP; 2373 cw1200_update_filtering(priv); 2374 } 2375 wsm_set_operational_mode(priv, &mode); 2376 return ret; 2377} 2378 2379static int cw1200_update_beaconing(struct cw1200_common *priv) 2380{ 2381 struct ieee80211_bss_conf *conf = &priv->vif->bss_conf; 2382 struct wsm_reset reset = { 2383 .link_id = 0, 2384 .reset_statistics = true, 2385 }; 2386 2387 if (priv->mode == NL80211_IFTYPE_AP) { 2388 /* TODO: check if changed channel, band */ 2389 if (priv->join_status != CW1200_JOIN_STATUS_AP || 2390 priv->beacon_int != conf->beacon_int) { 2391 pr_debug("ap restarting\n"); 2392 wsm_lock_tx(priv); 2393 if (priv->join_status != CW1200_JOIN_STATUS_PASSIVE) 2394 wsm_reset(priv, &reset); 2395 priv->join_status = CW1200_JOIN_STATUS_PASSIVE; 2396 cw1200_start_ap(priv); 2397 wsm_unlock_tx(priv); 2398 } else 2399 pr_debug("ap started join_status: %d\n", 2400 priv->join_status); 2401 } 2402 return 0; 2403} 2404