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         /* Free Tx and Rx packets, report disconnect to upper layer */
  58         mwifiex_clean_txrx(priv);
  59
  60         /* Reset SNR/NF/RSSI values */
  61         priv->data_rssi_last = 0;
  62         priv->data_nf_last = 0;
  63         priv->data_rssi_avg = 0;
  64         priv->data_nf_avg = 0;
  65         priv->bcn_rssi_last = 0;
  66         priv->bcn_nf_last = 0;
  67         priv->bcn_rssi_avg = 0;
  68         priv->bcn_nf_avg = 0;
  69         priv->rxpd_rate = 0;
  70         priv->rxpd_htinfo = 0;
  71         priv->sec_info.wpa_enabled = false;
  72         priv->sec_info.wpa2_enabled = false;
  73         priv->wpa_ie_len = 0;
  74
  75         priv->sec_info.wapi_enabled = false;
  76         priv->wapi_ie_len = 0;
  77         priv->sec_info.wapi_key_on = false;
  78
  79         priv->sec_info.encryption_mode = 0;
  80
  81         /* Enable auto data rate */
  82         priv->is_data_rate_auto = true;
  83         priv->data_rate = 0;
  84
  85         if (priv->bss_mode == NL80211_IFTYPE_ADHOC) {
  86                 priv->adhoc_state = ADHOC_IDLE;
  87                 priv->adhoc_is_link_sensed = false;
  88         }
  89
  90         /*
  91          * Memorize the previous SSID and BSSID so
  92          * it could be used for re-assoc
  93          */
  94
  95         dev_dbg(adapter->dev, "info: previous SSID=%s, SSID len=%u\n",
  96                 priv->prev_ssid.ssid, priv->prev_ssid.ssid_len);
  97
  98         dev_dbg(adapter->dev, "info: current SSID=%s, SSID len=%u\n",
  99                 priv->curr_bss_params.bss_descriptor.ssid.ssid,
 100                 priv->curr_bss_params.bss_descriptor.ssid.ssid_len);
 101
 102         memcpy(&priv->prev_ssid,
 103                &priv->curr_bss_params.bss_descriptor.ssid,
 104                sizeof(struct cfg80211_ssid));
 105
 106         memcpy(priv->prev_bssid,
 107                priv->curr_bss_params.bss_descriptor.mac_address, ETH_ALEN);
 108
 109         /* Need to erase the current SSID and BSSID info */
 110         memset(&priv->curr_bss_params, 0x00, sizeof(priv->curr_bss_params));
 111
 112         adapter->tx_lock_flag = false;
 113         adapter->pps_uapsd_mode = false;
 114
 115         if (adapter->num_cmd_timeout && adapter->curr_cmd)
 116                 return;
 117         priv->media_connected = false;
 118         dev_dbg(adapter->dev,
 119                 "info: successfully disconnected from %pM: reason code %d\n",
 120                 priv->cfg_bssid, reason_code);
 121         if (priv->bss_mode == NL80211_IFTYPE_STATION ||
 122             priv->bss_mode == NL80211_IFTYPE_P2P_CLIENT) {
 123                 cfg80211_disconnected(priv->netdev, reason_code, NULL, 0,
 124                                       GFP_KERNEL);
 125         }
 126         memset(priv->cfg_bssid, 0, ETH_ALEN);
 127
 128         mwifiex_stop_net_dev_queue(priv->netdev, adapter);
 129         if (netif_carrier_ok(priv->netdev))
 130                 netif_carrier_off(priv->netdev);
 131 }
 132
 133 /*
 134  * This function handles events generated by firmware.
 135  *
 136  * This is a generic function and handles all events.
 137  *
 138  * Event specific routines are called by this function based
 139  * upon the generated event cause.
 140  *
 141  * For the following events, the function just forwards them to upper
 142  * layers, optionally recording the change -
 143  *      - EVENT_LINK_SENSED
 144  *      - EVENT_MIC_ERR_UNICAST
 145  *      - EVENT_MIC_ERR_MULTICAST
 146  *      - EVENT_PORT_RELEASE
 147  *      - EVENT_RSSI_LOW
 148  *      - EVENT_SNR_LOW
 149  *      - EVENT_MAX_FAIL
 150  *      - EVENT_RSSI_HIGH
 151  *      - EVENT_SNR_HIGH
 152  *      - EVENT_DATA_RSSI_LOW
 153  *      - EVENT_DATA_SNR_LOW
 154  *      - EVENT_DATA_RSSI_HIGH
 155  *      - EVENT_DATA_SNR_HIGH
 156  *      - EVENT_LINK_QUALITY
 157  *      - EVENT_PRE_BEACON_LOST
 158  *      - EVENT_IBSS_COALESCED
 159  *      - EVENT_WEP_ICV_ERR
 160  *      - EVENT_BW_CHANGE
 161  *      - EVENT_HOSTWAKE_STAIE
 162   *
 163  * For the following events, no action is taken -
 164  *      - EVENT_MIB_CHANGED
 165  *      - EVENT_INIT_DONE
 166  *      - EVENT_DUMMY_HOST_WAKEUP_SIGNAL
 167  *
 168  * Rest of the supported events requires driver handling -
 169  *      - EVENT_DEAUTHENTICATED
 170  *      - EVENT_DISASSOCIATED
 171  *      - EVENT_LINK_LOST
 172  *      - EVENT_PS_SLEEP
 173  *      - EVENT_PS_AWAKE
 174  *      - EVENT_DEEP_SLEEP_AWAKE
 175  *      - EVENT_HS_ACT_REQ
 176  *      - EVENT_ADHOC_BCN_LOST
 177  *      - EVENT_BG_SCAN_REPORT
 178  *      - EVENT_WMM_STATUS_CHANGE
 179  *      - EVENT_ADDBA
 180  *      - EVENT_DELBA
 181  *      - EVENT_BA_STREAM_TIEMOUT
 182  *      - EVENT_AMSDU_AGGR_CTRL
 183  */
 184 int mwifiex_process_sta_event(struct mwifiex_private *priv)
 185 {
 186         struct mwifiex_adapter *adapter = priv->adapter;
 187         int ret = 0;
 188         u32 eventcause = adapter->event_cause;
 189         u16 ctrl, reason_code;
 190
 191         switch (eventcause) {
 192         case EVENT_DUMMY_HOST_WAKEUP_SIGNAL:
 193                 dev_err(adapter->dev,
 194                         "invalid EVENT: DUMMY_HOST_WAKEUP_SIGNAL, ignore it\n");
 195                 break;
 196         case EVENT_LINK_SENSED:
 197                 dev_dbg(adapter->dev, "event: LINK_SENSED\n");
 198                 if (!netif_carrier_ok(priv->netdev))
 199                         netif_carrier_on(priv->netdev);
 200                 mwifiex_wake_up_net_dev_queue(priv->netdev, adapter);
 201                 break;
 202
 203         case EVENT_DEAUTHENTICATED:
 204                 dev_dbg(adapter->dev, "event: Deauthenticated\n");
 205                 if (priv->wps.session_enable) {
 206                         dev_dbg(adapter->dev,
 207                                 "info: receive deauth event in wps session\n");
 208                         break;
 209                 }
 210                 adapter->dbg.num_event_deauth++;
 211                 if (priv->media_connected) {
 212                         reason_code =
 213                                 le16_to_cpu(*(__le16 *)adapter->event_body);
 214                         mwifiex_reset_connect_state(priv, reason_code);
 215                 }
 216                 break;
 217
 218         case EVENT_DISASSOCIATED:
 219                 dev_dbg(adapter->dev, "event: Disassociated\n");
 220                 if (priv->wps.session_enable) {
 221                         dev_dbg(adapter->dev,
 222                                 "info: receive disassoc event in wps session\n");
 223                         break;
 224                 }
 225                 adapter->dbg.num_event_disassoc++;
 226                 if (priv->media_connected) {
 227                         reason_code =
 228                                 le16_to_cpu(*(__le16 *)adapter->event_body);
 229                         mwifiex_reset_connect_state(priv, reason_code);
 230                 }
 231                 break;
 232
 233         case EVENT_LINK_LOST:
 234                 dev_dbg(adapter->dev, "event: Link lost\n");
 235                 adapter->dbg.num_event_link_lost++;
 236                 if (priv->media_connected) {
 237                         reason_code =
 238                                 le16_to_cpu(*(__le16 *)adapter->event_body);
 239                         mwifiex_reset_connect_state(priv, reason_code);
 240                 }
 241                 break;
 242
 243         case EVENT_PS_SLEEP:
 244                 dev_dbg(adapter->dev, "info: EVENT: SLEEP\n");
 245
 246                 adapter->ps_state = PS_STATE_PRE_SLEEP;
 247
 248                 mwifiex_check_ps_cond(adapter);
 249                 break;
 250
 251         case EVENT_PS_AWAKE:
 252                 dev_dbg(adapter->dev, "info: EVENT: AWAKE\n");
 253                 if (!adapter->pps_uapsd_mode &&
 254                     priv->media_connected && adapter->sleep_period.period) {
 255                                 adapter->pps_uapsd_mode = true;
 256                                 dev_dbg(adapter->dev,
 257                                         "event: PPS/UAPSD mode activated\n");
 258                 }
 259                 adapter->tx_lock_flag = false;
 260                 if (adapter->pps_uapsd_mode && adapter->gen_null_pkt) {
 261                         if (mwifiex_check_last_packet_indication(priv)) {
 262                                 if (adapter->data_sent) {
 263                                         adapter->ps_state = PS_STATE_AWAKE;
 264                                         adapter->pm_wakeup_card_req = false;
 265                                         adapter->pm_wakeup_fw_try = false;
 266                                         break;
 267                                 }
 268                                 if (!mwifiex_send_null_packet
 269                                         (priv,
 270                                          MWIFIEX_TxPD_POWER_MGMT_NULL_PACKET |
 271                                          MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET))
 272                                                 adapter->ps_state =
 273                                                         PS_STATE_SLEEP;
 274                                         return 0;
 275                         }
 276                 }
 277                 adapter->ps_state = PS_STATE_AWAKE;
 278                 adapter->pm_wakeup_card_req = false;
 279                 adapter->pm_wakeup_fw_try = false;
 280
 281                 break;
 282
 283         case EVENT_DEEP_SLEEP_AWAKE:
 284                 adapter->if_ops.wakeup_complete(adapter);
 285                 dev_dbg(adapter->dev, "event: DS_AWAKE\n");
 286                 if (adapter->is_deep_sleep)
 287                         adapter->is_deep_sleep = false;
 288                 break;
 289
 290         case EVENT_HS_ACT_REQ:
 291                 dev_dbg(adapter->dev, "event: HS_ACT_REQ\n");
 292                 ret = mwifiex_send_cmd_async(priv,
 293                                              HostCmd_CMD_802_11_HS_CFG_ENH,
 294                                              0, 0, NULL);
 295                 break;
 296
 297         case EVENT_MIC_ERR_UNICAST:
 298                 dev_dbg(adapter->dev, "event: UNICAST MIC ERROR\n");
 299                 cfg80211_michael_mic_failure(priv->netdev, priv->cfg_bssid,
 300                                              NL80211_KEYTYPE_PAIRWISE,
 301                                              -1, NULL, GFP_KERNEL);
 302                 break;
 303
 304         case EVENT_MIC_ERR_MULTICAST:
 305                 dev_dbg(adapter->dev, "event: MULTICAST MIC ERROR\n");
 306                 cfg80211_michael_mic_failure(priv->netdev, priv->cfg_bssid,
 307                                              NL80211_KEYTYPE_GROUP,
 308                                              -1, NULL, GFP_KERNEL);
 309                 break;
 310         case EVENT_MIB_CHANGED:
 311         case EVENT_INIT_DONE:
 312                 break;
 313
 314         case EVENT_ADHOC_BCN_LOST:
 315                 dev_dbg(adapter->dev, "event: ADHOC_BCN_LOST\n");
 316                 priv->adhoc_is_link_sensed = false;
 317                 mwifiex_clean_txrx(priv);
 318                 mwifiex_stop_net_dev_queue(priv->netdev, adapter);
 319                 if (netif_carrier_ok(priv->netdev))
 320                         netif_carrier_off(priv->netdev);
 321                 break;
 322
 323         case EVENT_BG_SCAN_REPORT:
 324                 dev_dbg(adapter->dev, "event: BGS_REPORT\n");
 325                 ret = mwifiex_send_cmd_async(priv,
 326                                              HostCmd_CMD_802_11_BG_SCAN_QUERY,
 327                                              HostCmd_ACT_GEN_GET, 0, NULL);
 328                 break;
 329
 330         case EVENT_PORT_RELEASE:
 331                 dev_dbg(adapter->dev, "event: PORT RELEASE\n");
 332                 break;
 333
 334         case EVENT_WMM_STATUS_CHANGE:
 335                 dev_dbg(adapter->dev, "event: WMM status changed\n");
 336                 ret = mwifiex_send_cmd_async(priv, HostCmd_CMD_WMM_GET_STATUS,
 337                                              0, 0, NULL);
 338                 break;
 339
 340         case EVENT_RSSI_LOW:
 341                 cfg80211_cqm_rssi_notify(priv->netdev,
 342                                          NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
 343                                          GFP_KERNEL);
 344                 mwifiex_send_cmd_async(priv, HostCmd_CMD_RSSI_INFO,
 345                                        HostCmd_ACT_GEN_GET, 0, NULL);
 346                 priv->subsc_evt_rssi_state = RSSI_LOW_RECVD;
 347                 dev_dbg(adapter->dev, "event: Beacon RSSI_LOW\n");
 348                 break;
 349         case EVENT_SNR_LOW:
 350                 dev_dbg(adapter->dev, "event: Beacon SNR_LOW\n");
 351                 break;
 352         case EVENT_MAX_FAIL:
 353                 dev_dbg(adapter->dev, "event: MAX_FAIL\n");
 354                 break;
 355         case EVENT_RSSI_HIGH:
 356                 cfg80211_cqm_rssi_notify(priv->netdev,
 357                                          NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
 358                                          GFP_KERNEL);
 359                 mwifiex_send_cmd_async(priv, HostCmd_CMD_RSSI_INFO,
 360                                        HostCmd_ACT_GEN_GET, 0, NULL);
 361                 priv->subsc_evt_rssi_state = RSSI_HIGH_RECVD;
 362                 dev_dbg(adapter->dev, "event: Beacon RSSI_HIGH\n");
 363                 break;
 364         case EVENT_SNR_HIGH:
 365                 dev_dbg(adapter->dev, "event: Beacon SNR_HIGH\n");
 366                 break;
 367         case EVENT_DATA_RSSI_LOW:
 368                 dev_dbg(adapter->dev, "event: Data RSSI_LOW\n");
 369                 break;
 370         case EVENT_DATA_SNR_LOW:
 371                 dev_dbg(adapter->dev, "event: Data SNR_LOW\n");
 372                 break;
 373         case EVENT_DATA_RSSI_HIGH:
 374                 dev_dbg(adapter->dev, "event: Data RSSI_HIGH\n");
 375                 break;
 376         case EVENT_DATA_SNR_HIGH:
 377                 dev_dbg(adapter->dev, "event: Data SNR_HIGH\n");
 378                 break;
 379         case EVENT_LINK_QUALITY:
 380                 dev_dbg(adapter->dev, "event: Link Quality\n");
 381                 break;
 382         case EVENT_PRE_BEACON_LOST:
 383                 dev_dbg(adapter->dev, "event: Pre-Beacon Lost\n");
 384                 break;
 385         case EVENT_IBSS_COALESCED:
 386                 dev_dbg(adapter->dev, "event: IBSS_COALESCED\n");
 387                 ret = mwifiex_send_cmd_async(priv,
 388                                 HostCmd_CMD_802_11_IBSS_COALESCING_STATUS,
 389                                 HostCmd_ACT_GEN_GET, 0, NULL);
 390                 break;
 391         case EVENT_ADDBA:
 392                 dev_dbg(adapter->dev, "event: ADDBA Request\n");
 393                 mwifiex_send_cmd_async(priv, HostCmd_CMD_11N_ADDBA_RSP,
 394                                        HostCmd_ACT_GEN_SET, 0,
 395                                        adapter->event_body);
 396                 break;
 397         case EVENT_DELBA:
 398                 dev_dbg(adapter->dev, "event: DELBA Request\n");
 399                 mwifiex_11n_delete_ba_stream(priv, adapter->event_body);
 400                 break;
 401         case EVENT_BA_STREAM_TIEMOUT:
 402                 dev_dbg(adapter->dev, "event:  BA Stream timeout\n");
 403                 mwifiex_11n_ba_stream_timeout(priv,
 404                                               (struct host_cmd_ds_11n_batimeout
 405                                                *)
 406                                               adapter->event_body);
 407                 break;
 408         case EVENT_AMSDU_AGGR_CTRL:
 409                 ctrl = le16_to_cpu(*(__le16 *)adapter->event_body);
 410                 dev_dbg(adapter->dev, "event: AMSDU_AGGR_CTRL %d\n", ctrl);
 411
 412                 adapter->tx_buf_size =
 413                                 min_t(u16, adapter->curr_tx_buf_size, ctrl);
 414                 dev_dbg(adapter->dev, "event: tx_buf_size %d\n",
 415                         adapter->tx_buf_size);
 416                 break;
 417
 418         case EVENT_WEP_ICV_ERR:
 419                 dev_dbg(adapter->dev, "event: WEP ICV error\n");
 420                 break;
 421
 422         case EVENT_BW_CHANGE:
 423                 dev_dbg(adapter->dev, "event: BW Change\n");
 424                 break;
 425
 426         case EVENT_HOSTWAKE_STAIE:
 427                 dev_dbg(adapter->dev, "event: HOSTWAKE_STAIE %d\n", eventcause);
 428                 break;
 429
 430         case EVENT_REMAIN_ON_CHAN_EXPIRED:
 431                 dev_dbg(adapter->dev, "event: Remain on channel expired\n");
 432                 cfg80211_remain_on_channel_expired(priv->wdev,
 433                                                    priv->roc_cfg.cookie,
 434                                                    &priv->roc_cfg.chan,
 435                                                    GFP_ATOMIC);
 436
 437                 memset(&priv->roc_cfg, 0x00, sizeof(struct mwifiex_roc_cfg));
 438
 439                 break;
 440
 441         case EVENT_CHANNEL_SWITCH_ANN:
 442                 dev_dbg(adapter->dev, "event: Channel Switch Announcement\n");
 443                 priv->csa_expire_time =
 444                                 jiffies + msecs_to_jiffies(DFS_CHAN_MOVE_TIME);
 445                 priv->csa_chan = priv->curr_bss_params.bss_descriptor.channel;
 446                 ret = mwifiex_send_cmd_async(priv,
 447                         HostCmd_CMD_802_11_DEAUTHENTICATE,
 448                         HostCmd_ACT_GEN_SET, 0,
 449                         priv->curr_bss_params.bss_descriptor.mac_address);
 450                 break;
 451
 452         default:
 453                 dev_dbg(adapter->dev, "event: unknown event id: %#x\n",
 454                         eventcause);
 455                 break;
 456         }
 457
 458         return ret;
 459 }