drivers/net/wireless/mwifiex/sta_event.c

   1 /*
   2  * Marvell Wireless LAN device driver: station event handling
   3  *
   4  * Copyright (C) 2011, 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         /* Free Tx and Rx packets, report disconnect to upper layer */
  62         mwifiex_clean_txrx(priv);
  63
  64         /* Reset SNR/NF/RSSI values */
  65         priv->data_rssi_last = 0;
  66         priv->data_nf_last = 0;
  67         priv->data_rssi_avg = 0;
  68         priv->data_nf_avg = 0;
  69         priv->bcn_rssi_last = 0;
  70         priv->bcn_nf_last = 0;
  71         priv->bcn_rssi_avg = 0;
  72         priv->bcn_nf_avg = 0;
  73         priv->rxpd_rate = 0;
  74         priv->rxpd_htinfo = 0;
  75         priv->sec_info.wpa_enabled = false;
  76         priv->sec_info.wpa2_enabled = false;
  77         priv->wpa_ie_len = 0;
  78
  79         priv->sec_info.wapi_enabled = false;
  80         priv->wapi_ie_len = 0;
  81         priv->sec_info.wapi_key_on = false;
  82
  83         priv->sec_info.encryption_mode = 0;
  84
  85         /* Enable auto data rate */
  86         priv->is_data_rate_auto = true;
  87         priv->data_rate = 0;
  88
  89         if (priv->bss_mode == NL80211_IFTYPE_ADHOC) {
  90                 priv->adhoc_state = ADHOC_IDLE;
  91                 priv->adhoc_is_link_sensed = false;
  92         }
  93
  94         /*
  95          * Memorize the previous SSID and BSSID so
  96          * it could be used for re-assoc
  97          */
  98
  99         dev_dbg(adapter->dev, "info: previous SSID=%s, SSID len=%u\n",
 100                 priv->prev_ssid.ssid, priv->prev_ssid.ssid_len);
 101
 102         dev_dbg(adapter->dev, "info: current SSID=%s, SSID len=%u\n",
 103                 priv->curr_bss_params.bss_descriptor.ssid.ssid,
 104                 priv->curr_bss_params.bss_descriptor.ssid.ssid_len);
 105
 106         memcpy(&priv->prev_ssid,
 107                &priv->curr_bss_params.bss_descriptor.ssid,
 108                sizeof(struct cfg80211_ssid));
 109
 110         memcpy(priv->prev_bssid,
 111                priv->curr_bss_params.bss_descriptor.mac_address, ETH_ALEN);
 112
 113         /* Need to erase the current SSID and BSSID info */
 114         memset(&priv->curr_bss_params, 0x00, sizeof(priv->curr_bss_params));
 115
 116         adapter->tx_lock_flag = false;
 117         adapter->pps_uapsd_mode = false;
 118
 119         if (adapter->is_cmd_timedout && adapter->curr_cmd)
 120                 return;
 121         priv->media_connected = false;
 122         dev_dbg(adapter->dev,
 123                 "info: successfully disconnected from %pM: reason code %d\n",
 124                 priv->cfg_bssid, reason_code);
 125         if (priv->bss_mode == NL80211_IFTYPE_STATION ||
 126             priv->bss_mode == NL80211_IFTYPE_P2P_CLIENT) {
 127                 cfg80211_disconnected(priv->netdev, reason_code, NULL, 0,
 128                                       GFP_KERNEL);
 129         }
 130         memset(priv->cfg_bssid, 0, ETH_ALEN);
 131
 132         mwifiex_stop_net_dev_queue(priv->netdev, adapter);
 133         if (netif_carrier_ok(priv->netdev))
 134                 netif_carrier_off(priv->netdev);
 135 }
 136
 137 static int mwifiex_parse_tdls_event(struct mwifiex_private *priv,
 138                                     struct sk_buff *event_skb)
 139 {
 140         int ret = 0;
 141         struct mwifiex_adapter *adapter = priv->adapter;
 142         struct mwifiex_sta_node *sta_ptr;
 143         struct mwifiex_tdls_generic_event *tdls_evt =
 144                         (void *)event_skb->data + sizeof(adapter->event_cause);
 145
 146         /* reserved 2 bytes are not mandatory in tdls event */
 147         if (event_skb->len < (sizeof(struct mwifiex_tdls_generic_event) -
 148                               sizeof(u16) - sizeof(adapter->event_cause))) {
 149                 dev_err(adapter->dev, "Invalid event length!\n");
 150                 return -1;
 151         }
 152
 153         sta_ptr = mwifiex_get_sta_entry(priv, tdls_evt->peer_mac);
 154         if (!sta_ptr) {
 155                 dev_err(adapter->dev, "cannot get sta entry!\n");
 156                 return -1;
 157         }
 158
 159         switch (le16_to_cpu(tdls_evt->type)) {
 160         case TDLS_EVENT_LINK_TEAR_DOWN:
 161                 cfg80211_tdls_oper_request(priv->netdev,
 162                                            tdls_evt->peer_mac,
 163                                            NL80211_TDLS_TEARDOWN,
 164                                            le16_to_cpu(tdls_evt->u.reason_code),
 165                                            GFP_KERNEL);
 166                 ret = mwifiex_tdls_oper(priv, tdls_evt->peer_mac,
 167                                         MWIFIEX_TDLS_DISABLE_LINK);
 168                 queue_work(adapter->workqueue, &adapter->main_work);
 169                 break;
 170         default:
 171                 break;
 172         }
 173
 174         return ret;
 175 }
 176
 177 /*
 178  * This function handles events generated by firmware.
 179  *
 180  * This is a generic function and handles all events.
 181  *
 182  * Event specific routines are called by this function based
 183  * upon the generated event cause.
 184  *
 185  * For the following events, the function just forwards them to upper
 186  * layers, optionally recording the change -
 187  *      - EVENT_LINK_SENSED
 188  *      - EVENT_MIC_ERR_UNICAST
 189  *      - EVENT_MIC_ERR_MULTICAST
 190  *      - EVENT_PORT_RELEASE
 191  *      - EVENT_RSSI_LOW
 192  *      - EVENT_SNR_LOW
 193  *      - EVENT_MAX_FAIL
 194  *      - EVENT_RSSI_HIGH
 195  *      - EVENT_SNR_HIGH
 196  *      - EVENT_DATA_RSSI_LOW
 197  *      - EVENT_DATA_SNR_LOW
 198  *      - EVENT_DATA_RSSI_HIGH
 199  *      - EVENT_DATA_SNR_HIGH
 200  *      - EVENT_LINK_QUALITY
 201  *      - EVENT_PRE_BEACON_LOST
 202  *      - EVENT_IBSS_COALESCED
 203  *      - EVENT_WEP_ICV_ERR
 204  *      - EVENT_BW_CHANGE
 205  *      - EVENT_HOSTWAKE_STAIE
 206   *
 207  * For the following events, no action is taken -
 208  *      - EVENT_MIB_CHANGED
 209  *      - EVENT_INIT_DONE
 210  *      - EVENT_DUMMY_HOST_WAKEUP_SIGNAL
 211  *
 212  * Rest of the supported events requires driver handling -
 213  *      - EVENT_DEAUTHENTICATED
 214  *      - EVENT_DISASSOCIATED
 215  *      - EVENT_LINK_LOST
 216  *      - EVENT_PS_SLEEP
 217  *      - EVENT_PS_AWAKE
 218  *      - EVENT_DEEP_SLEEP_AWAKE
 219  *      - EVENT_HS_ACT_REQ
 220  *      - EVENT_ADHOC_BCN_LOST
 221  *      - EVENT_BG_SCAN_REPORT
 222  *      - EVENT_WMM_STATUS_CHANGE
 223  *      - EVENT_ADDBA
 224  *      - EVENT_DELBA
 225  *      - EVENT_BA_STREAM_TIEMOUT
 226  *      - EVENT_AMSDU_AGGR_CTRL
 227  */
 228 int mwifiex_process_sta_event(struct mwifiex_private *priv)
 229 {
 230         struct mwifiex_adapter *adapter = priv->adapter;
 231         int ret = 0;
 232         u32 eventcause = adapter->event_cause;
 233         u16 ctrl, reason_code;
 234
 235         switch (eventcause) {
 236         case EVENT_DUMMY_HOST_WAKEUP_SIGNAL:
 237                 dev_err(adapter->dev,
 238                         "invalid EVENT: DUMMY_HOST_WAKEUP_SIGNAL, ignore it\n");
 239                 break;
 240         case EVENT_LINK_SENSED:
 241                 dev_dbg(adapter->dev, "event: LINK_SENSED\n");
 242                 if (!netif_carrier_ok(priv->netdev))
 243                         netif_carrier_on(priv->netdev);
 244                 mwifiex_wake_up_net_dev_queue(priv->netdev, adapter);
 245                 break;
 246
 247         case EVENT_DEAUTHENTICATED:
 248                 dev_dbg(adapter->dev, "event: Deauthenticated\n");
 249                 if (priv->wps.session_enable) {
 250                         dev_dbg(adapter->dev,
 251                                 "info: receive deauth event in wps session\n");
 252                         break;
 253                 }
 254                 adapter->dbg.num_event_deauth++;
 255                 if (priv->media_connected) {
 256                         reason_code =
 257                                 le16_to_cpu(*(__le16 *)adapter->event_body);
 258                         mwifiex_reset_connect_state(priv, reason_code);
 259                 }
 260                 break;
 261
 262         case EVENT_DISASSOCIATED:
 263                 dev_dbg(adapter->dev, "event: Disassociated\n");
 264                 if (priv->wps.session_enable) {
 265                         dev_dbg(adapter->dev,
 266                                 "info: receive disassoc event in wps session\n");
 267                         break;
 268                 }
 269                 adapter->dbg.num_event_disassoc++;
 270                 if (priv->media_connected) {
 271                         reason_code =
 272                                 le16_to_cpu(*(__le16 *)adapter->event_body);
 273                         mwifiex_reset_connect_state(priv, reason_code);
 274                 }
 275                 break;
 276
 277         case EVENT_LINK_LOST:
 278                 dev_dbg(adapter->dev, "event: Link lost\n");
 279                 adapter->dbg.num_event_link_lost++;
 280                 if (priv->media_connected) {
 281                         reason_code =
 282                                 le16_to_cpu(*(__le16 *)adapter->event_body);
 283                         mwifiex_reset_connect_state(priv, reason_code);
 284                 }
 285                 break;
 286
 287         case EVENT_PS_SLEEP:
 288                 dev_dbg(adapter->dev, "info: EVENT: SLEEP\n");
 289
 290                 adapter->ps_state = PS_STATE_PRE_SLEEP;
 291
 292                 mwifiex_check_ps_cond(adapter);
 293                 break;
 294
 295         case EVENT_PS_AWAKE:
 296                 dev_dbg(adapter->dev, "info: EVENT: AWAKE\n");
 297                 if (!adapter->pps_uapsd_mode &&
 298                     priv->media_connected && adapter->sleep_period.period) {
 299                                 adapter->pps_uapsd_mode = true;
 300                                 dev_dbg(adapter->dev,
 301                                         "event: PPS/UAPSD mode activated\n");
 302                 }
 303                 adapter->tx_lock_flag = false;
 304                 if (adapter->pps_uapsd_mode && adapter->gen_null_pkt) {
 305                         if (mwifiex_check_last_packet_indication(priv)) {
 306                                 if (adapter->data_sent) {
 307                                         adapter->ps_state = PS_STATE_AWAKE;
 308                                         adapter->pm_wakeup_card_req = false;
 309                                         adapter->pm_wakeup_fw_try = false;
 310                                         break;
 311                                 }
 312                                 if (!mwifiex_send_null_packet
 313                                         (priv,
 314                                          MWIFIEX_TxPD_POWER_MGMT_NULL_PACKET |
 315                                          MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET))
 316                                                 adapter->ps_state =
 317                                                         PS_STATE_SLEEP;
 318                                         return 0;
 319                         }
 320                 }
 321                 adapter->ps_state = PS_STATE_AWAKE;
 322                 adapter->pm_wakeup_card_req = false;
 323                 adapter->pm_wakeup_fw_try = false;
 324
 325                 break;
 326
 327         case EVENT_DEEP_SLEEP_AWAKE:
 328                 adapter->if_ops.wakeup_complete(adapter);
 329                 dev_dbg(adapter->dev, "event: DS_AWAKE\n");
 330                 if (adapter->is_deep_sleep)
 331                         adapter->is_deep_sleep = false;
 332                 break;
 333
 334         case EVENT_HS_ACT_REQ:
 335                 dev_dbg(adapter->dev, "event: HS_ACT_REQ\n");
 336                 ret = mwifiex_send_cmd(priv, HostCmd_CMD_802_11_HS_CFG_ENH,
 337                                        0, 0, NULL, false);
 338                 break;
 339
 340         case EVENT_MIC_ERR_UNICAST:
 341                 dev_dbg(adapter->dev, "event: UNICAST MIC ERROR\n");
 342                 cfg80211_michael_mic_failure(priv->netdev, priv->cfg_bssid,
 343                                              NL80211_KEYTYPE_PAIRWISE,
 344                                              -1, NULL, GFP_KERNEL);
 345                 break;
 346
 347         case EVENT_MIC_ERR_MULTICAST:
 348                 dev_dbg(adapter->dev, "event: MULTICAST MIC ERROR\n");
 349                 cfg80211_michael_mic_failure(priv->netdev, priv->cfg_bssid,
 350                                              NL80211_KEYTYPE_GROUP,
 351                                              -1, NULL, GFP_KERNEL);
 352                 break;
 353         case EVENT_MIB_CHANGED:
 354         case EVENT_INIT_DONE:
 355                 break;
 356
 357         case EVENT_ADHOC_BCN_LOST:
 358                 dev_dbg(adapter->dev, "event: ADHOC_BCN_LOST\n");
 359                 priv->adhoc_is_link_sensed = false;
 360                 mwifiex_clean_txrx(priv);
 361                 mwifiex_stop_net_dev_queue(priv->netdev, adapter);
 362                 if (netif_carrier_ok(priv->netdev))
 363                         netif_carrier_off(priv->netdev);
 364                 break;
 365
 366         case EVENT_BG_SCAN_REPORT:
 367                 dev_dbg(adapter->dev, "event: BGS_REPORT\n");
 368                 ret = mwifiex_send_cmd(priv, HostCmd_CMD_802_11_BG_SCAN_QUERY,
 369                                        HostCmd_ACT_GEN_GET, 0, NULL, false);
 370                 break;
 371
 372         case EVENT_PORT_RELEASE:
 373                 dev_dbg(adapter->dev, "event: PORT RELEASE\n");
 374                 break;
 375
 376         case EVENT_EXT_SCAN_REPORT:
 377                 dev_dbg(adapter->dev, "event: EXT_SCAN Report\n");
 378                 if (adapter->ext_scan)
 379                         ret = mwifiex_handle_event_ext_scan_report(priv,
 380                                                 adapter->event_skb->data);
 381
 382                 break;
 383
 384         case EVENT_WMM_STATUS_CHANGE:
 385                 dev_dbg(adapter->dev, "event: WMM status changed\n");
 386                 ret = mwifiex_send_cmd(priv, HostCmd_CMD_WMM_GET_STATUS,
 387                                        0, 0, NULL, false);
 388                 break;
 389
 390         case EVENT_RSSI_LOW:
 391                 cfg80211_cqm_rssi_notify(priv->netdev,
 392                                          NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
 393                                          GFP_KERNEL);
 394                 mwifiex_send_cmd(priv, HostCmd_CMD_RSSI_INFO,
 395                                  HostCmd_ACT_GEN_GET, 0, NULL, false);
 396                 priv->subsc_evt_rssi_state = RSSI_LOW_RECVD;
 397                 dev_dbg(adapter->dev, "event: Beacon RSSI_LOW\n");
 398                 break;
 399         case EVENT_SNR_LOW:
 400                 dev_dbg(adapter->dev, "event: Beacon SNR_LOW\n");
 401                 break;
 402         case EVENT_MAX_FAIL:
 403                 dev_dbg(adapter->dev, "event: MAX_FAIL\n");
 404                 break;
 405         case EVENT_RSSI_HIGH:
 406                 cfg80211_cqm_rssi_notify(priv->netdev,
 407                                          NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
 408                                          GFP_KERNEL);
 409                 mwifiex_send_cmd(priv, HostCmd_CMD_RSSI_INFO,
 410                                  HostCmd_ACT_GEN_GET, 0, NULL, false);
 411                 priv->subsc_evt_rssi_state = RSSI_HIGH_RECVD;
 412                 dev_dbg(adapter->dev, "event: Beacon RSSI_HIGH\n");
 413                 break;
 414         case EVENT_SNR_HIGH:
 415                 dev_dbg(adapter->dev, "event: Beacon SNR_HIGH\n");
 416                 break;
 417         case EVENT_DATA_RSSI_LOW:
 418                 dev_dbg(adapter->dev, "event: Data RSSI_LOW\n");
 419                 break;
 420         case EVENT_DATA_SNR_LOW:
 421                 dev_dbg(adapter->dev, "event: Data SNR_LOW\n");
 422                 break;
 423         case EVENT_DATA_RSSI_HIGH:
 424                 dev_dbg(adapter->dev, "event: Data RSSI_HIGH\n");
 425                 break;
 426         case EVENT_DATA_SNR_HIGH:
 427                 dev_dbg(adapter->dev, "event: Data SNR_HIGH\n");
 428                 break;
 429         case EVENT_LINK_QUALITY:
 430                 dev_dbg(adapter->dev, "event: Link Quality\n");
 431                 break;
 432         case EVENT_PRE_BEACON_LOST:
 433                 dev_dbg(adapter->dev, "event: Pre-Beacon Lost\n");
 434                 break;
 435         case EVENT_IBSS_COALESCED:
 436                 dev_dbg(adapter->dev, "event: IBSS_COALESCED\n");
 437                 ret = mwifiex_send_cmd(priv,
 438                                 HostCmd_CMD_802_11_IBSS_COALESCING_STATUS,
 439                                 HostCmd_ACT_GEN_GET, 0, NULL, false);
 440                 break;
 441         case EVENT_ADDBA:
 442                 dev_dbg(adapter->dev, "event: ADDBA Request\n");
 443                 mwifiex_send_cmd(priv, HostCmd_CMD_11N_ADDBA_RSP,
 444                                  HostCmd_ACT_GEN_SET, 0,
 445                                  adapter->event_body, false);
 446                 break;
 447         case EVENT_DELBA:
 448                 dev_dbg(adapter->dev, "event: DELBA Request\n");
 449                 mwifiex_11n_delete_ba_stream(priv, adapter->event_body);
 450                 break;
 451         case EVENT_BA_STREAM_TIEMOUT:
 452                 dev_dbg(adapter->dev, "event:  BA Stream timeout\n");
 453                 mwifiex_11n_ba_stream_timeout(priv,
 454                                               (struct host_cmd_ds_11n_batimeout
 455                                                *)
 456                                               adapter->event_body);
 457                 break;
 458         case EVENT_AMSDU_AGGR_CTRL:
 459                 ctrl = le16_to_cpu(*(__le16 *)adapter->event_body);
 460                 dev_dbg(adapter->dev, "event: AMSDU_AGGR_CTRL %d\n", ctrl);
 461
 462                 adapter->tx_buf_size =
 463                                 min_t(u16, adapter->curr_tx_buf_size, ctrl);
 464                 dev_dbg(adapter->dev, "event: tx_buf_size %d\n",
 465                         adapter->tx_buf_size);
 466                 break;
 467
 468         case EVENT_WEP_ICV_ERR:
 469                 dev_dbg(adapter->dev, "event: WEP ICV error\n");
 470                 break;
 471
 472         case EVENT_BW_CHANGE:
 473                 dev_dbg(adapter->dev, "event: BW Change\n");
 474                 break;
 475
 476         case EVENT_HOSTWAKE_STAIE:
 477                 dev_dbg(adapter->dev, "event: HOSTWAKE_STAIE %d\n", eventcause);
 478                 break;
 479
 480         case EVENT_REMAIN_ON_CHAN_EXPIRED:
 481                 dev_dbg(adapter->dev, "event: Remain on channel expired\n");
 482                 cfg80211_remain_on_channel_expired(priv->wdev,
 483                                                    priv->roc_cfg.cookie,
 484                                                    &priv->roc_cfg.chan,
 485                                                    GFP_ATOMIC);
 486
 487                 memset(&priv->roc_cfg, 0x00, sizeof(struct mwifiex_roc_cfg));
 488
 489                 break;
 490
 491         case EVENT_CHANNEL_SWITCH_ANN:
 492                 dev_dbg(adapter->dev, "event: Channel Switch Announcement\n");
 493                 priv->csa_expire_time =
 494                                 jiffies + msecs_to_jiffies(DFS_CHAN_MOVE_TIME);
 495                 priv->csa_chan = priv->curr_bss_params.bss_descriptor.channel;
 496                 ret = mwifiex_send_cmd(priv, HostCmd_CMD_802_11_DEAUTHENTICATE,
 497                         HostCmd_ACT_GEN_SET, 0,
 498                         priv->curr_bss_params.bss_descriptor.mac_address,
 499                         false);
 500                 break;
 501
 502         case EVENT_TDLS_GENERIC_EVENT:
 503                 ret = mwifiex_parse_tdls_event(priv, adapter->event_skb);
 504                 break;
 505
 506         default:
 507                 dev_dbg(adapter->dev, "event: unknown event id: %#x\n",
 508                         eventcause);
 509                 break;
 510         }
 511
 512         return ret;
 513 }