1/* 2 * Marvell Wireless LAN device driver: station event handling 3 * 4 * Copyright (C) 2011-2014, Marvell International Ltd. 5 * 6 * This software file (the "File") is distributed by Marvell International 7 * Ltd. under the terms of the GNU General Public License Version 2, June 1991 8 * (the "License"). You may use, redistribute and/or modify this File in 9 * accordance with the terms and conditions of the License, a copy of which 10 * is available by writing to the Free Software Foundation, Inc., 11 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the 12 * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt. 13 * 14 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE 16 * ARE EXPRESSLY DISCLAIMED. The License provides additional details about 17 * this warranty disclaimer. 18 */ 19 20#include "decl.h" 21#include "ioctl.h" 22#include "util.h" 23#include "fw.h" 24#include "main.h" 25#include "wmm.h" 26#include "11n.h" 27 28/* 29 * This function resets the connection state. 30 * 31 * The function is invoked after receiving a disconnect event from firmware, 32 * and performs the following actions - 33 * - Set media status to disconnected 34 * - Clean up Tx and Rx packets 35 * - Resets SNR/NF/RSSI value in driver 36 * - Resets security configurations in driver 37 * - Enables auto data rate 38 * - Saves the previous SSID and BSSID so that they can 39 * be used for re-association, if required 40 * - Erases current SSID and BSSID information 41 * - Sends a disconnect event to upper layers/applications. 42 */ 43void 44mwifiex_reset_connect_state(struct mwifiex_private *priv, u16 reason_code) 45{ 46 struct mwifiex_adapter *adapter = priv->adapter; 47 48 if (!priv->media_connected) 49 return; 50 51 dev_dbg(adapter->dev, "info: handles disconnect event\n"); 52 53 priv->media_connected = false; 54 55 priv->scan_block = false; 56 57 if ((GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA) && 58 ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info)) { 59 mwifiex_disable_all_tdls_links(priv); 60 61 if (priv->adapter->auto_tdls) 62 mwifiex_clean_auto_tdls(priv); 63 } 64 65 /* Free Tx and Rx packets, report disconnect to upper layer */ 66 mwifiex_clean_txrx(priv); 67 68 /* Reset SNR/NF/RSSI values */ 69 priv->data_rssi_last = 0; 70 priv->data_nf_last = 0; 71 priv->data_rssi_avg = 0; 72 priv->data_nf_avg = 0; 73 priv->bcn_rssi_last = 0; 74 priv->bcn_nf_last = 0; 75 priv->bcn_rssi_avg = 0; 76 priv->bcn_nf_avg = 0; 77 priv->rxpd_rate = 0; 78 priv->rxpd_htinfo = 0; 79 priv->sec_info.wpa_enabled = false; 80 priv->sec_info.wpa2_enabled = false; 81 priv->wpa_ie_len = 0; 82 83 priv->sec_info.wapi_enabled = false; 84 priv->wapi_ie_len = 0; 85 priv->sec_info.wapi_key_on = false; 86 87 priv->sec_info.encryption_mode = 0; 88 89 /* Enable auto data rate */ 90 priv->is_data_rate_auto = true; 91 priv->data_rate = 0; 92 93 if ((GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA || 94 GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) && priv->hist_data) 95 mwifiex_hist_data_reset(priv); 96 97 if (priv->bss_mode == NL80211_IFTYPE_ADHOC) { 98 priv->adhoc_state = ADHOC_IDLE; 99 priv->adhoc_is_link_sensed = false; 100 } 101 102 /* 103 * Memorize the previous SSID and BSSID so 104 * it could be used for re-assoc 105 */ 106 107 dev_dbg(adapter->dev, "info: previous SSID=%s, SSID len=%u\n", 108 priv->prev_ssid.ssid, priv->prev_ssid.ssid_len); 109 110 dev_dbg(adapter->dev, "info: current SSID=%s, SSID len=%u\n", 111 priv->curr_bss_params.bss_descriptor.ssid.ssid, 112 priv->curr_bss_params.bss_descriptor.ssid.ssid_len); 113 114 memcpy(&priv->prev_ssid, 115 &priv->curr_bss_params.bss_descriptor.ssid, 116 sizeof(struct cfg80211_ssid)); 117 118 memcpy(priv->prev_bssid, 119 priv->curr_bss_params.bss_descriptor.mac_address, ETH_ALEN); 120 121 /* Need to erase the current SSID and BSSID info */ 122 memset(&priv->curr_bss_params, 0x00, sizeof(priv->curr_bss_params)); 123 124 adapter->tx_lock_flag = false; 125 adapter->pps_uapsd_mode = false; 126 127 if (adapter->is_cmd_timedout && adapter->curr_cmd) 128 return; 129 priv->media_connected = false; 130 dev_dbg(adapter->dev, 131 "info: successfully disconnected from %pM: reason code %d\n", 132 priv->cfg_bssid, reason_code); 133 if (priv->bss_mode == NL80211_IFTYPE_STATION || 134 priv->bss_mode == NL80211_IFTYPE_P2P_CLIENT) { 135 cfg80211_disconnected(priv->netdev, reason_code, NULL, 0, 136 GFP_KERNEL); 137 } 138 eth_zero_addr(priv->cfg_bssid); 139 140 mwifiex_stop_net_dev_queue(priv->netdev, adapter); 141 if (netif_carrier_ok(priv->netdev)) 142 netif_carrier_off(priv->netdev); 143} 144 145static int mwifiex_parse_tdls_event(struct mwifiex_private *priv, 146 struct sk_buff *event_skb) 147{ 148 int ret = 0; 149 struct mwifiex_adapter *adapter = priv->adapter; 150 struct mwifiex_sta_node *sta_ptr; 151 struct mwifiex_tdls_generic_event *tdls_evt = 152 (void *)event_skb->data + sizeof(adapter->event_cause); 153 154 /* reserved 2 bytes are not mandatory in tdls event */ 155 if (event_skb->len < (sizeof(struct mwifiex_tdls_generic_event) - 156 sizeof(u16) - sizeof(adapter->event_cause))) { 157 dev_err(adapter->dev, "Invalid event length!\n"); 158 return -1; 159 } 160 161 sta_ptr = mwifiex_get_sta_entry(priv, tdls_evt->peer_mac); 162 if (!sta_ptr) { 163 dev_err(adapter->dev, "cannot get sta entry!\n"); 164 return -1; 165 } 166 167 switch (le16_to_cpu(tdls_evt->type)) { 168 case TDLS_EVENT_LINK_TEAR_DOWN: 169 cfg80211_tdls_oper_request(priv->netdev, 170 tdls_evt->peer_mac, 171 NL80211_TDLS_TEARDOWN, 172 le16_to_cpu(tdls_evt->u.reason_code), 173 GFP_KERNEL); 174 break; 175 default: 176 break; 177 } 178 179 return ret; 180} 181 182/* 183 * This function handles events generated by firmware. 184 * 185 * This is a generic function and handles all events. 186 * 187 * Event specific routines are called by this function based 188 * upon the generated event cause. 189 * 190 * For the following events, the function just forwards them to upper 191 * layers, optionally recording the change - 192 * - EVENT_LINK_SENSED 193 * - EVENT_MIC_ERR_UNICAST 194 * - EVENT_MIC_ERR_MULTICAST 195 * - EVENT_PORT_RELEASE 196 * - EVENT_RSSI_LOW 197 * - EVENT_SNR_LOW 198 * - EVENT_MAX_FAIL 199 * - EVENT_RSSI_HIGH 200 * - EVENT_SNR_HIGH 201 * - EVENT_DATA_RSSI_LOW 202 * - EVENT_DATA_SNR_LOW 203 * - EVENT_DATA_RSSI_HIGH 204 * - EVENT_DATA_SNR_HIGH 205 * - EVENT_LINK_QUALITY 206 * - EVENT_PRE_BEACON_LOST 207 * - EVENT_IBSS_COALESCED 208 * - EVENT_WEP_ICV_ERR 209 * - EVENT_BW_CHANGE 210 * - EVENT_HOSTWAKE_STAIE 211 * 212 * For the following events, no action is taken - 213 * - EVENT_MIB_CHANGED 214 * - EVENT_INIT_DONE 215 * - EVENT_DUMMY_HOST_WAKEUP_SIGNAL 216 * 217 * Rest of the supported events requires driver handling - 218 * - EVENT_DEAUTHENTICATED 219 * - EVENT_DISASSOCIATED 220 * - EVENT_LINK_LOST 221 * - EVENT_PS_SLEEP 222 * - EVENT_PS_AWAKE 223 * - EVENT_DEEP_SLEEP_AWAKE 224 * - EVENT_HS_ACT_REQ 225 * - EVENT_ADHOC_BCN_LOST 226 * - EVENT_BG_SCAN_REPORT 227 * - EVENT_WMM_STATUS_CHANGE 228 * - EVENT_ADDBA 229 * - EVENT_DELBA 230 * - EVENT_BA_STREAM_TIEMOUT 231 * - EVENT_AMSDU_AGGR_CTRL 232 */ 233int mwifiex_process_sta_event(struct mwifiex_private *priv) 234{ 235 struct mwifiex_adapter *adapter = priv->adapter; 236 int ret = 0; 237 u32 eventcause = adapter->event_cause; 238 u16 ctrl, reason_code; 239 240 switch (eventcause) { 241 case EVENT_DUMMY_HOST_WAKEUP_SIGNAL: 242 dev_err(adapter->dev, 243 "invalid EVENT: DUMMY_HOST_WAKEUP_SIGNAL, ignore it\n"); 244 break; 245 case EVENT_LINK_SENSED: 246 dev_dbg(adapter->dev, "event: LINK_SENSED\n"); 247 if (!netif_carrier_ok(priv->netdev)) 248 netif_carrier_on(priv->netdev); 249 mwifiex_wake_up_net_dev_queue(priv->netdev, adapter); 250 break; 251 252 case EVENT_DEAUTHENTICATED: 253 dev_dbg(adapter->dev, "event: Deauthenticated\n"); 254 if (priv->wps.session_enable) { 255 dev_dbg(adapter->dev, 256 "info: receive deauth event in wps session\n"); 257 break; 258 } 259 adapter->dbg.num_event_deauth++; 260 if (priv->media_connected) { 261 reason_code = 262 le16_to_cpu(*(__le16 *)adapter->event_body); 263 mwifiex_reset_connect_state(priv, reason_code); 264 } 265 break; 266 267 case EVENT_DISASSOCIATED: 268 dev_dbg(adapter->dev, "event: Disassociated\n"); 269 if (priv->wps.session_enable) { 270 dev_dbg(adapter->dev, 271 "info: receive disassoc event in wps session\n"); 272 break; 273 } 274 adapter->dbg.num_event_disassoc++; 275 if (priv->media_connected) { 276 reason_code = 277 le16_to_cpu(*(__le16 *)adapter->event_body); 278 mwifiex_reset_connect_state(priv, reason_code); 279 } 280 break; 281 282 case EVENT_LINK_LOST: 283 dev_dbg(adapter->dev, "event: Link lost\n"); 284 adapter->dbg.num_event_link_lost++; 285 if (priv->media_connected) { 286 reason_code = 287 le16_to_cpu(*(__le16 *)adapter->event_body); 288 mwifiex_reset_connect_state(priv, reason_code); 289 } 290 break; 291 292 case EVENT_PS_SLEEP: 293 dev_dbg(adapter->dev, "info: EVENT: SLEEP\n"); 294 295 adapter->ps_state = PS_STATE_PRE_SLEEP; 296 297 mwifiex_check_ps_cond(adapter); 298 break; 299 300 case EVENT_PS_AWAKE: 301 dev_dbg(adapter->dev, "info: EVENT: AWAKE\n"); 302 if (!adapter->pps_uapsd_mode && 303 priv->media_connected && adapter->sleep_period.period) { 304 adapter->pps_uapsd_mode = true; 305 dev_dbg(adapter->dev, 306 "event: PPS/UAPSD mode activated\n"); 307 } 308 adapter->tx_lock_flag = false; 309 if (adapter->pps_uapsd_mode && adapter->gen_null_pkt) { 310 if (mwifiex_check_last_packet_indication(priv)) { 311 if (adapter->data_sent) { 312 adapter->ps_state = PS_STATE_AWAKE; 313 adapter->pm_wakeup_card_req = false; 314 adapter->pm_wakeup_fw_try = false; 315 del_timer(&adapter->wakeup_timer); 316 break; 317 } 318 if (!mwifiex_send_null_packet 319 (priv, 320 MWIFIEX_TxPD_POWER_MGMT_NULL_PACKET | 321 MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET)) 322 adapter->ps_state = 323 PS_STATE_SLEEP; 324 return 0; 325 } 326 } 327 adapter->ps_state = PS_STATE_AWAKE; 328 adapter->pm_wakeup_card_req = false; 329 adapter->pm_wakeup_fw_try = false; 330 del_timer(&adapter->wakeup_timer); 331 332 break; 333 334 case EVENT_DEEP_SLEEP_AWAKE: 335 adapter->if_ops.wakeup_complete(adapter); 336 dev_dbg(adapter->dev, "event: DS_AWAKE\n"); 337 if (adapter->is_deep_sleep) 338 adapter->is_deep_sleep = false; 339 break; 340 341 case EVENT_HS_ACT_REQ: 342 dev_dbg(adapter->dev, "event: HS_ACT_REQ\n"); 343 ret = mwifiex_send_cmd(priv, HostCmd_CMD_802_11_HS_CFG_ENH, 344 0, 0, NULL, false); 345 break; 346 347 case EVENT_MIC_ERR_UNICAST: 348 dev_dbg(adapter->dev, "event: UNICAST MIC ERROR\n"); 349 cfg80211_michael_mic_failure(priv->netdev, priv->cfg_bssid, 350 NL80211_KEYTYPE_PAIRWISE, 351 -1, NULL, GFP_KERNEL); 352 break; 353 354 case EVENT_MIC_ERR_MULTICAST: 355 dev_dbg(adapter->dev, "event: MULTICAST MIC ERROR\n"); 356 cfg80211_michael_mic_failure(priv->netdev, priv->cfg_bssid, 357 NL80211_KEYTYPE_GROUP, 358 -1, NULL, GFP_KERNEL); 359 break; 360 case EVENT_MIB_CHANGED: 361 case EVENT_INIT_DONE: 362 break; 363 364 case EVENT_ADHOC_BCN_LOST: 365 dev_dbg(adapter->dev, "event: ADHOC_BCN_LOST\n"); 366 priv->adhoc_is_link_sensed = false; 367 mwifiex_clean_txrx(priv); 368 mwifiex_stop_net_dev_queue(priv->netdev, adapter); 369 if (netif_carrier_ok(priv->netdev)) 370 netif_carrier_off(priv->netdev); 371 break; 372 373 case EVENT_BG_SCAN_REPORT: 374 dev_dbg(adapter->dev, "event: BGS_REPORT\n"); 375 ret = mwifiex_send_cmd(priv, HostCmd_CMD_802_11_BG_SCAN_QUERY, 376 HostCmd_ACT_GEN_GET, 0, NULL, false); 377 break; 378 379 case EVENT_PORT_RELEASE: 380 dev_dbg(adapter->dev, "event: PORT RELEASE\n"); 381 break; 382 383 case EVENT_EXT_SCAN_REPORT: 384 dev_dbg(adapter->dev, "event: EXT_SCAN Report\n"); 385 if (adapter->ext_scan) 386 ret = mwifiex_handle_event_ext_scan_report(priv, 387 adapter->event_skb->data); 388 389 break; 390 391 case EVENT_WMM_STATUS_CHANGE: 392 dev_dbg(adapter->dev, "event: WMM status changed\n"); 393 ret = mwifiex_send_cmd(priv, HostCmd_CMD_WMM_GET_STATUS, 394 0, 0, NULL, false); 395 break; 396 397 case EVENT_RSSI_LOW: 398 cfg80211_cqm_rssi_notify(priv->netdev, 399 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 400 GFP_KERNEL); 401 mwifiex_send_cmd(priv, HostCmd_CMD_RSSI_INFO, 402 HostCmd_ACT_GEN_GET, 0, NULL, false); 403 priv->subsc_evt_rssi_state = RSSI_LOW_RECVD; 404 dev_dbg(adapter->dev, "event: Beacon RSSI_LOW\n"); 405 break; 406 case EVENT_SNR_LOW: 407 dev_dbg(adapter->dev, "event: Beacon SNR_LOW\n"); 408 break; 409 case EVENT_MAX_FAIL: 410 dev_dbg(adapter->dev, "event: MAX_FAIL\n"); 411 break; 412 case EVENT_RSSI_HIGH: 413 cfg80211_cqm_rssi_notify(priv->netdev, 414 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 415 GFP_KERNEL); 416 mwifiex_send_cmd(priv, HostCmd_CMD_RSSI_INFO, 417 HostCmd_ACT_GEN_GET, 0, NULL, false); 418 priv->subsc_evt_rssi_state = RSSI_HIGH_RECVD; 419 dev_dbg(adapter->dev, "event: Beacon RSSI_HIGH\n"); 420 break; 421 case EVENT_SNR_HIGH: 422 dev_dbg(adapter->dev, "event: Beacon SNR_HIGH\n"); 423 break; 424 case EVENT_DATA_RSSI_LOW: 425 dev_dbg(adapter->dev, "event: Data RSSI_LOW\n"); 426 break; 427 case EVENT_DATA_SNR_LOW: 428 dev_dbg(adapter->dev, "event: Data SNR_LOW\n"); 429 break; 430 case EVENT_DATA_RSSI_HIGH: 431 dev_dbg(adapter->dev, "event: Data RSSI_HIGH\n"); 432 break; 433 case EVENT_DATA_SNR_HIGH: 434 dev_dbg(adapter->dev, "event: Data SNR_HIGH\n"); 435 break; 436 case EVENT_LINK_QUALITY: 437 dev_dbg(adapter->dev, "event: Link Quality\n"); 438 break; 439 case EVENT_PRE_BEACON_LOST: 440 dev_dbg(adapter->dev, "event: Pre-Beacon Lost\n"); 441 break; 442 case EVENT_IBSS_COALESCED: 443 dev_dbg(adapter->dev, "event: IBSS_COALESCED\n"); 444 ret = mwifiex_send_cmd(priv, 445 HostCmd_CMD_802_11_IBSS_COALESCING_STATUS, 446 HostCmd_ACT_GEN_GET, 0, NULL, false); 447 break; 448 case EVENT_ADDBA: 449 dev_dbg(adapter->dev, "event: ADDBA Request\n"); 450 mwifiex_send_cmd(priv, HostCmd_CMD_11N_ADDBA_RSP, 451 HostCmd_ACT_GEN_SET, 0, 452 adapter->event_body, false); 453 break; 454 case EVENT_DELBA: 455 dev_dbg(adapter->dev, "event: DELBA Request\n"); 456 mwifiex_11n_delete_ba_stream(priv, adapter->event_body); 457 break; 458 case EVENT_BA_STREAM_TIEMOUT: 459 dev_dbg(adapter->dev, "event: BA Stream timeout\n"); 460 mwifiex_11n_ba_stream_timeout(priv, 461 (struct host_cmd_ds_11n_batimeout 462 *) 463 adapter->event_body); 464 break; 465 case EVENT_AMSDU_AGGR_CTRL: 466 ctrl = le16_to_cpu(*(__le16 *)adapter->event_body); 467 dev_dbg(adapter->dev, "event: AMSDU_AGGR_CTRL %d\n", ctrl); 468 469 adapter->tx_buf_size = 470 min_t(u16, adapter->curr_tx_buf_size, ctrl); 471 dev_dbg(adapter->dev, "event: tx_buf_size %d\n", 472 adapter->tx_buf_size); 473 break; 474 475 case EVENT_WEP_ICV_ERR: 476 dev_dbg(adapter->dev, "event: WEP ICV error\n"); 477 break; 478 479 case EVENT_BW_CHANGE: 480 dev_dbg(adapter->dev, "event: BW Change\n"); 481 break; 482 483 case EVENT_HOSTWAKE_STAIE: 484 dev_dbg(adapter->dev, "event: HOSTWAKE_STAIE %d\n", eventcause); 485 break; 486 487 case EVENT_REMAIN_ON_CHAN_EXPIRED: 488 dev_dbg(adapter->dev, "event: Remain on channel expired\n"); 489 cfg80211_remain_on_channel_expired(&priv->wdev, 490 priv->roc_cfg.cookie, 491 &priv->roc_cfg.chan, 492 GFP_ATOMIC); 493 494 memset(&priv->roc_cfg, 0x00, sizeof(struct mwifiex_roc_cfg)); 495 496 break; 497 498 case EVENT_CHANNEL_SWITCH_ANN: 499 dev_dbg(adapter->dev, "event: Channel Switch Announcement\n"); 500 priv->csa_expire_time = 501 jiffies + msecs_to_jiffies(DFS_CHAN_MOVE_TIME); 502 priv->csa_chan = priv->curr_bss_params.bss_descriptor.channel; 503 ret = mwifiex_send_cmd(priv, HostCmd_CMD_802_11_DEAUTHENTICATE, 504 HostCmd_ACT_GEN_SET, 0, 505 priv->curr_bss_params.bss_descriptor.mac_address, 506 false); 507 break; 508 509 case EVENT_TDLS_GENERIC_EVENT: 510 ret = mwifiex_parse_tdls_event(priv, adapter->event_skb); 511 break; 512 513 case EVENT_TX_STATUS_REPORT: 514 dev_dbg(adapter->dev, "event: TX_STATUS Report\n"); 515 mwifiex_parse_tx_status_event(priv, adapter->event_body); 516 break; 517 518 case EVENT_CHANNEL_REPORT_RDY: 519 dev_dbg(adapter->dev, "event: Channel Report\n"); 520 ret = mwifiex_11h_handle_chanrpt_ready(priv, 521 adapter->event_skb); 522 break; 523 case EVENT_RADAR_DETECTED: 524 dev_dbg(adapter->dev, "event: Radar detected\n"); 525 ret = mwifiex_11h_handle_radar_detected(priv, 526 adapter->event_skb); 527 break; 528 default: 529 dev_dbg(adapter->dev, "event: unknown event id: %#x\n", 530 eventcause); 531 break; 532 } 533 534 return ret; 535} 536