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