drivers/net/wireless/mwifiex/sta_event.c

   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  */
  43 void
  44 mwifiex_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 (priv->bss_mode == NL80211_IFTYPE_ADHOC) {
  94                 priv->adhoc_state = ADHOC_IDLE;
  95                 priv->adhoc_is_link_sensed = false;
  96         }
  97
  98         /*
  99          * Memorize the previous SSID and BSSID so
 100          * it could be used for re-assoc
 101          */
 102
 103         dev_dbg(adapter->dev, "info: previous SSID=%s, SSID len=%u\n",
 104                 priv->prev_ssid.ssid, priv->prev_ssid.ssid_len);
 105
 106         dev_dbg(adapter->dev, "info: current SSID=%s, SSID len=%u\n",
 107                 priv->curr_bss_params.bss_descriptor.ssid.ssid,
 108                 priv->curr_bss_params.bss_descriptor.ssid.ssid_len);
 109
 110         memcpy(&priv->prev_ssid,
 111                &priv->curr_bss_params.bss_descriptor.ssid,
 112                sizeof(struct cfg80211_ssid));
 113
 114         memcpy(priv->prev_bssid,
 115                priv->curr_bss_params.bss_descriptor.mac_address, ETH_ALEN);
 116
 117         /* Need to erase the current SSID and BSSID info */
 118         memset(&priv->curr_bss_params, 0x00, sizeof(priv->curr_bss_params));
 119
 120         adapter->tx_lock_flag = false;
 121         adapter->pps_uapsd_mode = false;
 122
 123         if (adapter->is_cmd_timedout && adapter->curr_cmd)
 124                 return;
 125         priv->media_connected = false;
 126         dev_dbg(adapter->dev,
 127                 "info: successfully disconnected from %pM: reason code %d\n",
 128                 priv->cfg_bssid, reason_code);
 129         if (priv->bss_mode == NL80211_IFTYPE_STATION ||
 130             priv->bss_mode == NL80211_IFTYPE_P2P_CLIENT) {
 131                 cfg80211_disconnected(priv->netdev, reason_code, NULL, 0,
 132                                       GFP_KERNEL);
 133         }
 134         memset(priv->cfg_bssid, 0, ETH_ALEN);
 135
 136         mwifiex_stop_net_dev_queue(priv->netdev, adapter);
 137         if (netif_carrier_ok(priv->netdev))
 138                 netif_carrier_off(priv->netdev);
 139 }
 140
 141 static int mwifiex_parse_tdls_event(struct mwifiex_private *priv,
 142                                     struct sk_buff *event_skb)
 143 {
 144         int ret = 0;
 145         struct mwifiex_adapter *adapter = priv->adapter;
 146         struct mwifiex_sta_node *sta_ptr;
 147         struct mwifiex_tdls_generic_event *tdls_evt =
 148                         (void *)event_skb->data + sizeof(adapter->event_cause);
 149
 150         /* reserved 2 bytes are not mandatory in tdls event */
 151         if (event_skb->len < (sizeof(struct mwifiex_tdls_generic_event) -
 152                               sizeof(u16) - sizeof(adapter->event_cause))) {
 153                 dev_err(adapter->dev, "Invalid event length!\n");
 154                 return -1;
 155         }
 156
 157         sta_ptr = mwifiex_get_sta_entry(priv, tdls_evt->peer_mac);
 158         if (!sta_ptr) {
 159                 dev_err(adapter->dev, "cannot get sta entry!\n");
 160                 return -1;
 161         }
 162
 163         switch (le16_to_cpu(tdls_evt->type)) {
 164         case TDLS_EVENT_LINK_TEAR_DOWN:
 165                 cfg80211_tdls_oper_request(priv->netdev,
 166                                            tdls_evt->peer_mac,
 167                                            NL80211_TDLS_TEARDOWN,
 168                                            le16_to_cpu(tdls_evt->u.reason_code),
 169                                            GFP_KERNEL);
 170                 break;
 171         default:
 172                 break;
 173         }
 174
 175         return ret;
 176 }
 177
 178 /*
 179  * This function handles events generated by firmware.
 180  *
 181  * This is a generic function and handles all events.
 182  *
 183  * Event specific routines are called by this function based
 184  * upon the generated event cause.
 185  *
 186  * For the following events, the function just forwards them to upper
 187  * layers, optionally recording the change -
 188  *      - EVENT_LINK_SENSED
 189  *      - EVENT_MIC_ERR_UNICAST
 190  *      - EVENT_MIC_ERR_MULTICAST
 191  *      - EVENT_PORT_RELEASE
 192  *      - EVENT_RSSI_LOW
 193  *      - EVENT_SNR_LOW
 194  *      - EVENT_MAX_FAIL
 195  *      - EVENT_RSSI_HIGH
 196  *      - EVENT_SNR_HIGH
 197  *      - EVENT_DATA_RSSI_LOW
 198  *      - EVENT_DATA_SNR_LOW
 199  *      - EVENT_DATA_RSSI_HIGH
 200  *      - EVENT_DATA_SNR_HIGH
 201  *      - EVENT_LINK_QUALITY
 202  *      - EVENT_PRE_BEACON_LOST
 203  *      - EVENT_IBSS_COALESCED
 204  *      - EVENT_WEP_ICV_ERR
 205  *      - EVENT_BW_CHANGE
 206  *      - EVENT_HOSTWAKE_STAIE
 207   *
 208  * For the following events, no action is taken -
 209  *      - EVENT_MIB_CHANGED
 210  *      - EVENT_INIT_DONE
 211  *      - EVENT_DUMMY_HOST_WAKEUP_SIGNAL
 212  *
 213  * Rest of the supported events requires driver handling -
 214  *      - EVENT_DEAUTHENTICATED
 215  *      - EVENT_DISASSOCIATED
 216  *      - EVENT_LINK_LOST
 217  *      - EVENT_PS_SLEEP
 218  *      - EVENT_PS_AWAKE
 219  *      - EVENT_DEEP_SLEEP_AWAKE
 220  *      - EVENT_HS_ACT_REQ
 221  *      - EVENT_ADHOC_BCN_LOST
 222  *      - EVENT_BG_SCAN_REPORT
 223  *      - EVENT_WMM_STATUS_CHANGE
 224  *      - EVENT_ADDBA
 225  *      - EVENT_DELBA
 226  *      - EVENT_BA_STREAM_TIEMOUT
 227  *      - EVENT_AMSDU_AGGR_CTRL
 228  */
 229 int mwifiex_process_sta_event(struct mwifiex_private *priv)
 230 {
 231         struct mwifiex_adapter *adapter = priv->adapter;
 232         int ret = 0;
 233         u32 eventcause = adapter->event_cause;
 234         u16 ctrl, reason_code;
 235
 236         switch (eventcause) {
 237         case EVENT_DUMMY_HOST_WAKEUP_SIGNAL:
 238                 dev_err(adapter->dev,
 239                         "invalid EVENT: DUMMY_HOST_WAKEUP_SIGNAL, ignore it\n");
 240                 break;
 241         case EVENT_LINK_SENSED:
 242                 dev_dbg(adapter->dev, "event: LINK_SENSED\n");
 243                 if (!netif_carrier_ok(priv->netdev))
 244                         netif_carrier_on(priv->netdev);
 245                 mwifiex_wake_up_net_dev_queue(priv->netdev, adapter);
 246                 break;
 247
 248         case EVENT_DEAUTHENTICATED:
 249                 dev_dbg(adapter->dev, "event: Deauthenticated\n");
 250                 if (priv->wps.session_enable) {
 251                         dev_dbg(adapter->dev,
 252                                 "info: receive deauth event in wps session\n");
 253                         break;
 254                 }
 255                 adapter->dbg.num_event_deauth++;
 256                 if (priv->media_connected) {
 257                         reason_code =
 258                                 le16_to_cpu(*(__le16 *)adapter->event_body);
 259                         mwifiex_reset_connect_state(priv, reason_code);
 260                 }
 261                 break;
 262
 263         case EVENT_DISASSOCIATED:
 264                 dev_dbg(adapter->dev, "event: Disassociated\n");
 265                 if (priv->wps.session_enable) {
 266                         dev_dbg(adapter->dev,
 267                                 "info: receive disassoc event in wps session\n");
 268                         break;
 269                 }
 270                 adapter->dbg.num_event_disassoc++;
 271                 if (priv->media_connected) {
 272                         reason_code =
 273                                 le16_to_cpu(*(__le16 *)adapter->event_body);
 274                         mwifiex_reset_connect_state(priv, reason_code);
 275                 }
 276                 break;
 277
 278         case EVENT_LINK_LOST:
 279                 dev_dbg(adapter->dev, "event: Link lost\n");
 280                 adapter->dbg.num_event_link_lost++;
 281                 if (priv->media_connected) {
 282                         reason_code =
 283                                 le16_to_cpu(*(__le16 *)adapter->event_body);
 284                         mwifiex_reset_connect_state(priv, reason_code);
 285                 }
 286                 break;
 287
 288         case EVENT_PS_SLEEP:
 289                 dev_dbg(adapter->dev, "info: EVENT: SLEEP\n");
 290
 291                 adapter->ps_state = PS_STATE_PRE_SLEEP;
 292
 293                 mwifiex_check_ps_cond(adapter);
 294                 break;
 295
 296         case EVENT_PS_AWAKE:
 297                 dev_dbg(adapter->dev, "info: EVENT: AWAKE\n");
 298                 if (!adapter->pps_uapsd_mode &&
 299                     priv->media_connected && adapter->sleep_period.period) {
 300                                 adapter->pps_uapsd_mode = true;
 301                                 dev_dbg(adapter->dev,
 302                                         "event: PPS/UAPSD mode activated\n");
 303                 }
 304                 adapter->tx_lock_flag = false;
 305                 if (adapter->pps_uapsd_mode && adapter->gen_null_pkt) {
 306                         if (mwifiex_check_last_packet_indication(priv)) {
 307                                 if (adapter->data_sent) {
 308                                         adapter->ps_state = PS_STATE_AWAKE;
 309                                         adapter->pm_wakeup_card_req = false;
 310                                         adapter->pm_wakeup_fw_try = false;
 311                                         break;
 312                                 }
 313                                 if (!mwifiex_send_null_packet
 314                                         (priv,
 315                                          MWIFIEX_TxPD_POWER_MGMT_NULL_PACKET |
 316                                          MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET))
 317                                                 adapter->ps_state =
 318                                                         PS_STATE_SLEEP;
 319                                         return 0;
 320                         }
 321                 }
 322                 adapter->ps_state = PS_STATE_AWAKE;
 323                 adapter->pm_wakeup_card_req = false;
 324                 adapter->pm_wakeup_fw_try = false;
 325
 326                 break;
 327
 328         case EVENT_DEEP_SLEEP_AWAKE:
 329                 adapter->if_ops.wakeup_complete(adapter);
 330                 dev_dbg(adapter->dev, "event: DS_AWAKE\n");
 331                 if (adapter->is_deep_sleep)
 332                         adapter->is_deep_sleep = false;
 333                 break;
 334
 335         case EVENT_HS_ACT_REQ:
 336                 dev_dbg(adapter->dev, "event: HS_ACT_REQ\n");
 337                 ret = mwifiex_send_cmd(priv, HostCmd_CMD_802_11_HS_CFG_ENH,
 338                                        0, 0, NULL, false);
 339                 break;
 340
 341         case EVENT_MIC_ERR_UNICAST:
 342                 dev_dbg(adapter->dev, "event: UNICAST MIC ERROR\n");
 343                 cfg80211_michael_mic_failure(priv->netdev, priv->cfg_bssid,
 344                                              NL80211_KEYTYPE_PAIRWISE,
 345                                              -1, NULL, GFP_KERNEL);
 346                 break;
 347
 348         case EVENT_MIC_ERR_MULTICAST:
 349                 dev_dbg(adapter->dev, "event: MULTICAST MIC ERROR\n");
 350                 cfg80211_michael_mic_failure(priv->netdev, priv->cfg_bssid,
 351                                              NL80211_KEYTYPE_GROUP,
 352                                              -1, NULL, GFP_KERNEL);
 353                 break;
 354         case EVENT_MIB_CHANGED:
 355         case EVENT_INIT_DONE:
 356                 break;
 357
 358         case EVENT_ADHOC_BCN_LOST:
 359                 dev_dbg(adapter->dev, "event: ADHOC_BCN_LOST\n");
 360                 priv->adhoc_is_link_sensed = false;
 361                 mwifiex_clean_txrx(priv);
 362                 mwifiex_stop_net_dev_queue(priv->netdev, adapter);
 363                 if (netif_carrier_ok(priv->netdev))
 364                         netif_carrier_off(priv->netdev);
 365                 break;
 366
 367         case EVENT_BG_SCAN_REPORT:
 368                 dev_dbg(adapter->dev, "event: BGS_REPORT\n");
 369                 ret = mwifiex_send_cmd(priv, HostCmd_CMD_802_11_BG_SCAN_QUERY,
 370                                        HostCmd_ACT_GEN_GET, 0, NULL, false);
 371                 break;
 372
 373         case EVENT_PORT_RELEASE:
 374                 dev_dbg(adapter->dev, "event: PORT RELEASE\n");
 375                 break;
 376
 377         case EVENT_EXT_SCAN_REPORT:
 378                 dev_dbg(adapter->dev, "event: EXT_SCAN Report\n");
 379                 if (adapter->ext_scan)
 380                         ret = mwifiex_handle_event_ext_scan_report(priv,
 381                                                 adapter->event_skb->data);
 382
 383                 break;
 384
 385         case EVENT_WMM_STATUS_CHANGE:
 386                 dev_dbg(adapter->dev, "event: WMM status changed\n");
 387                 ret = mwifiex_send_cmd(priv, HostCmd_CMD_WMM_GET_STATUS,
 388                                        0, 0, NULL, false);
 389                 break;
 390
 391         case EVENT_RSSI_LOW:
 392                 cfg80211_cqm_rssi_notify(priv->netdev,
 393                                          NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
 394                                          GFP_KERNEL);
 395                 mwifiex_send_cmd(priv, HostCmd_CMD_RSSI_INFO,
 396                                  HostCmd_ACT_GEN_GET, 0, NULL, false);
 397                 priv->subsc_evt_rssi_state = RSSI_LOW_RECVD;
 398                 dev_dbg(adapter->dev, "event: Beacon RSSI_LOW\n");
 399                 break;
 400         case EVENT_SNR_LOW:
 401                 dev_dbg(adapter->dev, "event: Beacon SNR_LOW\n");
 402                 break;
 403         case EVENT_MAX_FAIL:
 404                 dev_dbg(adapter->dev, "event: MAX_FAIL\n");
 405                 break;
 406         case EVENT_RSSI_HIGH:
 407                 cfg80211_cqm_rssi_notify(priv->netdev,
 408                                          NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
 409                                          GFP_KERNEL);
 410                 mwifiex_send_cmd(priv, HostCmd_CMD_RSSI_INFO,
 411                                  HostCmd_ACT_GEN_GET, 0, NULL, false);
 412                 priv->subsc_evt_rssi_state = RSSI_HIGH_RECVD;
 413                 dev_dbg(adapter->dev, "event: Beacon RSSI_HIGH\n");
 414                 break;
 415         case EVENT_SNR_HIGH:
 416                 dev_dbg(adapter->dev, "event: Beacon SNR_HIGH\n");
 417                 break;
 418         case EVENT_DATA_RSSI_LOW:
 419                 dev_dbg(adapter->dev, "event: Data RSSI_LOW\n");
 420                 break;
 421         case EVENT_DATA_SNR_LOW:
 422                 dev_dbg(adapter->dev, "event: Data SNR_LOW\n");
 423                 break;
 424         case EVENT_DATA_RSSI_HIGH:
 425                 dev_dbg(adapter->dev, "event: Data RSSI_HIGH\n");
 426                 break;
 427         case EVENT_DATA_SNR_HIGH:
 428                 dev_dbg(adapter->dev, "event: Data SNR_HIGH\n");
 429                 break;
 430         case EVENT_LINK_QUALITY:
 431                 dev_dbg(adapter->dev, "event: Link Quality\n");
 432                 break;
 433         case EVENT_PRE_BEACON_LOST:
 434                 dev_dbg(adapter->dev, "event: Pre-Beacon Lost\n");
 435                 break;
 436         case EVENT_IBSS_COALESCED:
 437                 dev_dbg(adapter->dev, "event: IBSS_COALESCED\n");
 438                 ret = mwifiex_send_cmd(priv,
 439                                 HostCmd_CMD_802_11_IBSS_COALESCING_STATUS,
 440                                 HostCmd_ACT_GEN_GET, 0, NULL, false);
 441                 break;
 442         case EVENT_ADDBA:
 443                 dev_dbg(adapter->dev, "event: ADDBA Request\n");
 444                 mwifiex_send_cmd(priv, HostCmd_CMD_11N_ADDBA_RSP,
 445                                  HostCmd_ACT_GEN_SET, 0,
 446                                  adapter->event_body, false);
 447                 break;
 448         case EVENT_DELBA:
 449                 dev_dbg(adapter->dev, "event: DELBA Request\n");
 450                 mwifiex_11n_delete_ba_stream(priv, adapter->event_body);
 451                 break;
 452         case EVENT_BA_STREAM_TIEMOUT:
 453                 dev_dbg(adapter->dev, "event:  BA Stream timeout\n");
 454                 mwifiex_11n_ba_stream_timeout(priv,
 455                                               (struct host_cmd_ds_11n_batimeout
 456                                                *)
 457                                               adapter->event_body);
 458                 break;
 459         case EVENT_AMSDU_AGGR_CTRL:
 460                 ctrl = le16_to_cpu(*(__le16 *)adapter->event_body);
 461                 dev_dbg(adapter->dev, "event: AMSDU_AGGR_CTRL %d\n", ctrl);
 462
 463                 adapter->tx_buf_size =
 464                                 min_t(u16, adapter->curr_tx_buf_size, ctrl);
 465                 dev_dbg(adapter->dev, "event: tx_buf_size %d\n",
 466                         adapter->tx_buf_size);
 467                 break;
 468
 469         case EVENT_WEP_ICV_ERR:
 470                 dev_dbg(adapter->dev, "event: WEP ICV error\n");
 471                 break;
 472
 473         case EVENT_BW_CHANGE:
 474                 dev_dbg(adapter->dev, "event: BW Change\n");
 475                 break;
 476
 477         case EVENT_HOSTWAKE_STAIE:
 478                 dev_dbg(adapter->dev, "event: HOSTWAKE_STAIE %d\n", eventcause);
 479                 break;
 480
 481         case EVENT_REMAIN_ON_CHAN_EXPIRED:
 482                 dev_dbg(adapter->dev, "event: Remain on channel expired\n");
 483                 cfg80211_remain_on_channel_expired(priv->wdev,
 484                                                    priv->roc_cfg.cookie,
 485                                                    &priv->roc_cfg.chan,
 486                                                    GFP_ATOMIC);
 487
 488                 memset(&priv->roc_cfg, 0x00, sizeof(struct mwifiex_roc_cfg));
 489
 490                 break;
 491
 492         case EVENT_CHANNEL_SWITCH_ANN:
 493                 dev_dbg(adapter->dev, "event: Channel Switch Announcement\n");
 494                 priv->csa_expire_time =
 495                                 jiffies + msecs_to_jiffies(DFS_CHAN_MOVE_TIME);
 496                 priv->csa_chan = priv->curr_bss_params.bss_descriptor.channel;
 497                 ret = mwifiex_send_cmd(priv, HostCmd_CMD_802_11_DEAUTHENTICATE,
 498                         HostCmd_ACT_GEN_SET, 0,
 499                         priv->curr_bss_params.bss_descriptor.mac_address,
 500                         false);
 501                 break;
 502
 503         case EVENT_TDLS_GENERIC_EVENT:
 504                 ret = mwifiex_parse_tdls_event(priv, adapter->event_skb);
 505                 break;
 506
 507         case EVENT_TX_STATUS_REPORT:
 508                 dev_dbg(adapter->dev, "event: TX_STATUS Report\n");
 509                 mwifiex_parse_tx_status_event(priv, adapter->event_body);
 510                 break;
 511
 512         default:
 513                 dev_dbg(adapter->dev, "event: unknown event id: %#x\n",
 514                         eventcause);
 515                 break;
 516         }
 517
 518         return ret;
 519 }