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                 cfg80211_disconnected(priv->netdev, reason_code, NULL, 0,
 123                                       GFP_KERNEL);
 124         }
 125         memset(priv->cfg_bssid, 0, ETH_ALEN);
 126
 127         if (!netif_queue_stopped(priv->netdev))
 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                 if (netif_queue_stopped(priv->netdev))
 201                         mwifiex_wake_up_net_dev_queue(priv->netdev, adapter);
 202                 break;
 203
 204         case EVENT_DEAUTHENTICATED:
 205                 dev_dbg(adapter->dev, "event: Deauthenticated\n");
 206                 adapter->dbg.num_event_deauth++;
 207                 if (priv->media_connected) {
 208                         reason_code =
 209                                 le16_to_cpu(*(__le16 *)adapter->event_body);
 210                         mwifiex_reset_connect_state(priv, reason_code);
 211                 }
 212                 break;
 213
 214         case EVENT_DISASSOCIATED:
 215                 dev_dbg(adapter->dev, "event: Disassociated\n");
 216                 adapter->dbg.num_event_disassoc++;
 217                 if (priv->media_connected) {
 218                         reason_code =
 219                                 le16_to_cpu(*(__le16 *)adapter->event_body);
 220                         mwifiex_reset_connect_state(priv, reason_code);
 221                 }
 222                 break;
 223
 224         case EVENT_LINK_LOST:
 225                 dev_dbg(adapter->dev, "event: Link lost\n");
 226                 adapter->dbg.num_event_link_lost++;
 227                 if (priv->media_connected) {
 228                         reason_code =
 229                                 le16_to_cpu(*(__le16 *)adapter->event_body);
 230                         mwifiex_reset_connect_state(priv, reason_code);
 231                 }
 232                 break;
 233
 234         case EVENT_PS_SLEEP:
 235                 dev_dbg(adapter->dev, "info: EVENT: SLEEP\n");
 236
 237                 adapter->ps_state = PS_STATE_PRE_SLEEP;
 238
 239                 mwifiex_check_ps_cond(adapter);
 240                 break;
 241
 242         case EVENT_PS_AWAKE:
 243                 dev_dbg(adapter->dev, "info: EVENT: AWAKE\n");
 244                 if (!adapter->pps_uapsd_mode &&
 245                     priv->media_connected && adapter->sleep_period.period) {
 246                                 adapter->pps_uapsd_mode = true;
 247                                 dev_dbg(adapter->dev,
 248                                         "event: PPS/UAPSD mode activated\n");
 249                 }
 250                 adapter->tx_lock_flag = false;
 251                 if (adapter->pps_uapsd_mode && adapter->gen_null_pkt) {
 252                         if (mwifiex_check_last_packet_indication(priv)) {
 253                                 if (adapter->data_sent) {
 254                                         adapter->ps_state = PS_STATE_AWAKE;
 255                                         adapter->pm_wakeup_card_req = false;
 256                                         adapter->pm_wakeup_fw_try = false;
 257                                         break;
 258                                 }
 259                                 if (!mwifiex_send_null_packet
 260                                         (priv,
 261                                          MWIFIEX_TxPD_POWER_MGMT_NULL_PACKET |
 262                                          MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET))
 263                                                 adapter->ps_state =
 264                                                         PS_STATE_SLEEP;
 265                                         return 0;
 266                         }
 267                 }
 268                 adapter->ps_state = PS_STATE_AWAKE;
 269                 adapter->pm_wakeup_card_req = false;
 270                 adapter->pm_wakeup_fw_try = false;
 271
 272                 break;
 273
 274         case EVENT_DEEP_SLEEP_AWAKE:
 275                 adapter->if_ops.wakeup_complete(adapter);
 276                 dev_dbg(adapter->dev, "event: DS_AWAKE\n");
 277                 if (adapter->is_deep_sleep)
 278                         adapter->is_deep_sleep = false;
 279                 break;
 280
 281         case EVENT_HS_ACT_REQ:
 282                 dev_dbg(adapter->dev, "event: HS_ACT_REQ\n");
 283                 ret = mwifiex_send_cmd_async(priv,
 284                                              HostCmd_CMD_802_11_HS_CFG_ENH,
 285                                              0, 0, NULL);
 286                 break;
 287
 288         case EVENT_MIC_ERR_UNICAST:
 289                 dev_dbg(adapter->dev, "event: UNICAST MIC ERROR\n");
 290                 cfg80211_michael_mic_failure(priv->netdev, priv->cfg_bssid,
 291                                              NL80211_KEYTYPE_PAIRWISE,
 292                                              -1, NULL, GFP_KERNEL);
 293                 break;
 294
 295         case EVENT_MIC_ERR_MULTICAST:
 296                 dev_dbg(adapter->dev, "event: MULTICAST MIC ERROR\n");
 297                 cfg80211_michael_mic_failure(priv->netdev, priv->cfg_bssid,
 298                                              NL80211_KEYTYPE_GROUP,
 299                                              -1, NULL, GFP_KERNEL);
 300                 break;
 301         case EVENT_MIB_CHANGED:
 302         case EVENT_INIT_DONE:
 303                 break;
 304
 305         case EVENT_ADHOC_BCN_LOST:
 306                 dev_dbg(adapter->dev, "event: ADHOC_BCN_LOST\n");
 307                 priv->adhoc_is_link_sensed = false;
 308                 mwifiex_clean_txrx(priv);
 309                 if (!netif_queue_stopped(priv->netdev))
 310                         mwifiex_stop_net_dev_queue(priv->netdev, adapter);
 311                 if (netif_carrier_ok(priv->netdev))
 312                         netif_carrier_off(priv->netdev);
 313                 break;
 314
 315         case EVENT_BG_SCAN_REPORT:
 316                 dev_dbg(adapter->dev, "event: BGS_REPORT\n");
 317                 ret = mwifiex_send_cmd_async(priv,
 318                                              HostCmd_CMD_802_11_BG_SCAN_QUERY,
 319                                              HostCmd_ACT_GEN_GET, 0, NULL);
 320                 break;
 321
 322         case EVENT_PORT_RELEASE:
 323                 dev_dbg(adapter->dev, "event: PORT RELEASE\n");
 324                 break;
 325
 326         case EVENT_WMM_STATUS_CHANGE:
 327                 dev_dbg(adapter->dev, "event: WMM status changed\n");
 328                 ret = mwifiex_send_cmd_async(priv, HostCmd_CMD_WMM_GET_STATUS,
 329                                              0, 0, NULL);
 330                 break;
 331
 332         case EVENT_RSSI_LOW:
 333                 cfg80211_cqm_rssi_notify(priv->netdev,
 334                                          NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
 335                                          GFP_KERNEL);
 336                 mwifiex_send_cmd_async(priv, HostCmd_CMD_RSSI_INFO,
 337                                        HostCmd_ACT_GEN_GET, 0, NULL);
 338                 priv->subsc_evt_rssi_state = RSSI_LOW_RECVD;
 339                 dev_dbg(adapter->dev, "event: Beacon RSSI_LOW\n");
 340                 break;
 341         case EVENT_SNR_LOW:
 342                 dev_dbg(adapter->dev, "event: Beacon SNR_LOW\n");
 343                 break;
 344         case EVENT_MAX_FAIL:
 345                 dev_dbg(adapter->dev, "event: MAX_FAIL\n");
 346                 break;
 347         case EVENT_RSSI_HIGH:
 348                 cfg80211_cqm_rssi_notify(priv->netdev,
 349                                          NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
 350                                          GFP_KERNEL);
 351                 mwifiex_send_cmd_async(priv, HostCmd_CMD_RSSI_INFO,
 352                                        HostCmd_ACT_GEN_GET, 0, NULL);
 353                 priv->subsc_evt_rssi_state = RSSI_HIGH_RECVD;
 354                 dev_dbg(adapter->dev, "event: Beacon RSSI_HIGH\n");
 355                 break;
 356         case EVENT_SNR_HIGH:
 357                 dev_dbg(adapter->dev, "event: Beacon SNR_HIGH\n");
 358                 break;
 359         case EVENT_DATA_RSSI_LOW:
 360                 dev_dbg(adapter->dev, "event: Data RSSI_LOW\n");
 361                 break;
 362         case EVENT_DATA_SNR_LOW:
 363                 dev_dbg(adapter->dev, "event: Data SNR_LOW\n");
 364                 break;
 365         case EVENT_DATA_RSSI_HIGH:
 366                 dev_dbg(adapter->dev, "event: Data RSSI_HIGH\n");
 367                 break;
 368         case EVENT_DATA_SNR_HIGH:
 369                 dev_dbg(adapter->dev, "event: Data SNR_HIGH\n");
 370                 break;
 371         case EVENT_LINK_QUALITY:
 372                 dev_dbg(adapter->dev, "event: Link Quality\n");
 373                 break;
 374         case EVENT_PRE_BEACON_LOST:
 375                 dev_dbg(adapter->dev, "event: Pre-Beacon Lost\n");
 376                 break;
 377         case EVENT_IBSS_COALESCED:
 378                 dev_dbg(adapter->dev, "event: IBSS_COALESCED\n");
 379                 ret = mwifiex_send_cmd_async(priv,
 380                                 HostCmd_CMD_802_11_IBSS_COALESCING_STATUS,
 381                                 HostCmd_ACT_GEN_GET, 0, NULL);
 382                 break;
 383         case EVENT_ADDBA:
 384                 dev_dbg(adapter->dev, "event: ADDBA Request\n");
 385                 mwifiex_send_cmd_async(priv, HostCmd_CMD_11N_ADDBA_RSP,
 386                                        HostCmd_ACT_GEN_SET, 0,
 387                                        adapter->event_body);
 388                 break;
 389         case EVENT_DELBA:
 390                 dev_dbg(adapter->dev, "event: DELBA Request\n");
 391                 mwifiex_11n_delete_ba_stream(priv, adapter->event_body);
 392                 break;
 393         case EVENT_BA_STREAM_TIEMOUT:
 394                 dev_dbg(adapter->dev, "event:  BA Stream timeout\n");
 395                 mwifiex_11n_ba_stream_timeout(priv,
 396                                               (struct host_cmd_ds_11n_batimeout
 397                                                *)
 398                                               adapter->event_body);
 399                 break;
 400         case EVENT_AMSDU_AGGR_CTRL:
 401                 ctrl = le16_to_cpu(*(__le16 *)adapter->event_body);
 402                 dev_dbg(adapter->dev, "event: AMSDU_AGGR_CTRL %d\n", ctrl);
 403
 404                 adapter->tx_buf_size =
 405                                 min_t(u16, adapter->curr_tx_buf_size, ctrl);
 406                 dev_dbg(adapter->dev, "event: tx_buf_size %d\n",
 407                         adapter->tx_buf_size);
 408                 break;
 409
 410         case EVENT_WEP_ICV_ERR:
 411                 dev_dbg(adapter->dev, "event: WEP ICV error\n");
 412                 break;
 413
 414         case EVENT_BW_CHANGE:
 415                 dev_dbg(adapter->dev, "event: BW Change\n");
 416                 break;
 417
 418         case EVENT_HOSTWAKE_STAIE:
 419                 dev_dbg(adapter->dev, "event: HOSTWAKE_STAIE %d\n", eventcause);
 420                 break;
 421
 422         case EVENT_REMAIN_ON_CHAN_EXPIRED:
 423                 dev_dbg(adapter->dev, "event: Remain on channel expired\n");
 424                 cfg80211_remain_on_channel_expired(priv->wdev,
 425                                                    priv->roc_cfg.cookie,
 426                                                    &priv->roc_cfg.chan,
 427                                                    priv->roc_cfg.chan_type,
 428                                                    GFP_ATOMIC);
 429
 430                 memset(&priv->roc_cfg, 0x00, sizeof(struct mwifiex_roc_cfg));
 431
 432                 break;
 433
 434         default:
 435                 dev_dbg(adapter->dev, "event: unknown event id: %#x\n",
 436                         eventcause);
 437                 break;
 438         }
 439
 440         return ret;
 441 }