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->num_cmd_timeout && 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 /*
 138  * This function handles events generated by firmware.
 139  *
 140  * This is a generic function and handles all events.
 141  *
 142  * Event specific routines are called by this function based
 143  * upon the generated event cause.
 144  *
 145  * For the following events, the function just forwards them to upper
 146  * layers, optionally recording the change -
 147  *      - EVENT_LINK_SENSED
 148  *      - EVENT_MIC_ERR_UNICAST
 149  *      - EVENT_MIC_ERR_MULTICAST
 150  *      - EVENT_PORT_RELEASE
 151  *      - EVENT_RSSI_LOW
 152  *      - EVENT_SNR_LOW
 153  *      - EVENT_MAX_FAIL
 154  *      - EVENT_RSSI_HIGH
 155  *      - EVENT_SNR_HIGH
 156  *      - EVENT_DATA_RSSI_LOW
 157  *      - EVENT_DATA_SNR_LOW
 158  *      - EVENT_DATA_RSSI_HIGH
 159  *      - EVENT_DATA_SNR_HIGH
 160  *      - EVENT_LINK_QUALITY
 161  *      - EVENT_PRE_BEACON_LOST
 162  *      - EVENT_IBSS_COALESCED
 163  *      - EVENT_WEP_ICV_ERR
 164  *      - EVENT_BW_CHANGE
 165  *      - EVENT_HOSTWAKE_STAIE
 166   *
 167  * For the following events, no action is taken -
 168  *      - EVENT_MIB_CHANGED
 169  *      - EVENT_INIT_DONE
 170  *      - EVENT_DUMMY_HOST_WAKEUP_SIGNAL
 171  *
 172  * Rest of the supported events requires driver handling -
 173  *      - EVENT_DEAUTHENTICATED
 174  *      - EVENT_DISASSOCIATED
 175  *      - EVENT_LINK_LOST
 176  *      - EVENT_PS_SLEEP
 177  *      - EVENT_PS_AWAKE
 178  *      - EVENT_DEEP_SLEEP_AWAKE
 179  *      - EVENT_HS_ACT_REQ
 180  *      - EVENT_ADHOC_BCN_LOST
 181  *      - EVENT_BG_SCAN_REPORT
 182  *      - EVENT_WMM_STATUS_CHANGE
 183  *      - EVENT_ADDBA
 184  *      - EVENT_DELBA
 185  *      - EVENT_BA_STREAM_TIEMOUT
 186  *      - EVENT_AMSDU_AGGR_CTRL
 187  */
 188 int mwifiex_process_sta_event(struct mwifiex_private *priv)
 189 {
 190         struct mwifiex_adapter *adapter = priv->adapter;
 191         int ret = 0;
 192         u32 eventcause = adapter->event_cause;
 193         u16 ctrl, reason_code;
 194
 195         switch (eventcause) {
 196         case EVENT_DUMMY_HOST_WAKEUP_SIGNAL:
 197                 dev_err(adapter->dev,
 198                         "invalid EVENT: DUMMY_HOST_WAKEUP_SIGNAL, ignore it\n");
 199                 break;
 200         case EVENT_LINK_SENSED:
 201                 dev_dbg(adapter->dev, "event: LINK_SENSED\n");
 202                 if (!netif_carrier_ok(priv->netdev))
 203                         netif_carrier_on(priv->netdev);
 204                 mwifiex_wake_up_net_dev_queue(priv->netdev, adapter);
 205                 break;
 206
 207         case EVENT_DEAUTHENTICATED:
 208                 dev_dbg(adapter->dev, "event: Deauthenticated\n");
 209                 if (priv->wps.session_enable) {
 210                         dev_dbg(adapter->dev,
 211                                 "info: receive deauth event in wps session\n");
 212                         break;
 213                 }
 214                 adapter->dbg.num_event_deauth++;
 215                 if (priv->media_connected) {
 216                         reason_code =
 217                                 le16_to_cpu(*(__le16 *)adapter->event_body);
 218                         mwifiex_reset_connect_state(priv, reason_code);
 219                 }
 220                 break;
 221
 222         case EVENT_DISASSOCIATED:
 223                 dev_dbg(adapter->dev, "event: Disassociated\n");
 224                 if (priv->wps.session_enable) {
 225                         dev_dbg(adapter->dev,
 226                                 "info: receive disassoc event in wps session\n");
 227                         break;
 228                 }
 229                 adapter->dbg.num_event_disassoc++;
 230                 if (priv->media_connected) {
 231                         reason_code =
 232                                 le16_to_cpu(*(__le16 *)adapter->event_body);
 233                         mwifiex_reset_connect_state(priv, reason_code);
 234                 }
 235                 break;
 236
 237         case EVENT_LINK_LOST:
 238                 dev_dbg(adapter->dev, "event: Link lost\n");
 239                 adapter->dbg.num_event_link_lost++;
 240                 if (priv->media_connected) {
 241                         reason_code =
 242                                 le16_to_cpu(*(__le16 *)adapter->event_body);
 243                         mwifiex_reset_connect_state(priv, reason_code);
 244                 }
 245                 break;
 246
 247         case EVENT_PS_SLEEP:
 248                 dev_dbg(adapter->dev, "info: EVENT: SLEEP\n");
 249
 250                 adapter->ps_state = PS_STATE_PRE_SLEEP;
 251
 252                 mwifiex_check_ps_cond(adapter);
 253                 break;
 254
 255         case EVENT_PS_AWAKE:
 256                 dev_dbg(adapter->dev, "info: EVENT: AWAKE\n");
 257                 if (!adapter->pps_uapsd_mode &&
 258                     priv->media_connected && adapter->sleep_period.period) {
 259                                 adapter->pps_uapsd_mode = true;
 260                                 dev_dbg(adapter->dev,
 261                                         "event: PPS/UAPSD mode activated\n");
 262                 }
 263                 adapter->tx_lock_flag = false;
 264                 if (adapter->pps_uapsd_mode && adapter->gen_null_pkt) {
 265                         if (mwifiex_check_last_packet_indication(priv)) {
 266                                 if (adapter->data_sent) {
 267                                         adapter->ps_state = PS_STATE_AWAKE;
 268                                         adapter->pm_wakeup_card_req = false;
 269                                         adapter->pm_wakeup_fw_try = false;
 270                                         break;
 271                                 }
 272                                 if (!mwifiex_send_null_packet
 273                                         (priv,
 274                                          MWIFIEX_TxPD_POWER_MGMT_NULL_PACKET |
 275                                          MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET))
 276                                                 adapter->ps_state =
 277                                                         PS_STATE_SLEEP;
 278                                         return 0;
 279                         }
 280                 }
 281                 adapter->ps_state = PS_STATE_AWAKE;
 282                 adapter->pm_wakeup_card_req = false;
 283                 adapter->pm_wakeup_fw_try = false;
 284
 285                 break;
 286
 287         case EVENT_DEEP_SLEEP_AWAKE:
 288                 adapter->if_ops.wakeup_complete(adapter);
 289                 dev_dbg(adapter->dev, "event: DS_AWAKE\n");
 290                 if (adapter->is_deep_sleep)
 291                         adapter->is_deep_sleep = false;
 292                 break;
 293
 294         case EVENT_HS_ACT_REQ:
 295                 dev_dbg(adapter->dev, "event: HS_ACT_REQ\n");
 296                 ret = mwifiex_send_cmd(priv, HostCmd_CMD_802_11_HS_CFG_ENH,
 297                                        0, 0, NULL, false);
 298                 break;
 299
 300         case EVENT_MIC_ERR_UNICAST:
 301                 dev_dbg(adapter->dev, "event: UNICAST MIC ERROR\n");
 302                 cfg80211_michael_mic_failure(priv->netdev, priv->cfg_bssid,
 303                                              NL80211_KEYTYPE_PAIRWISE,
 304                                              -1, NULL, GFP_KERNEL);
 305                 break;
 306
 307         case EVENT_MIC_ERR_MULTICAST:
 308                 dev_dbg(adapter->dev, "event: MULTICAST MIC ERROR\n");
 309                 cfg80211_michael_mic_failure(priv->netdev, priv->cfg_bssid,
 310                                              NL80211_KEYTYPE_GROUP,
 311                                              -1, NULL, GFP_KERNEL);
 312                 break;
 313         case EVENT_MIB_CHANGED:
 314         case EVENT_INIT_DONE:
 315                 break;
 316
 317         case EVENT_ADHOC_BCN_LOST:
 318                 dev_dbg(adapter->dev, "event: ADHOC_BCN_LOST\n");
 319                 priv->adhoc_is_link_sensed = false;
 320                 mwifiex_clean_txrx(priv);
 321                 mwifiex_stop_net_dev_queue(priv->netdev, adapter);
 322                 if (netif_carrier_ok(priv->netdev))
 323                         netif_carrier_off(priv->netdev);
 324                 break;
 325
 326         case EVENT_BG_SCAN_REPORT:
 327                 dev_dbg(adapter->dev, "event: BGS_REPORT\n");
 328                 ret = mwifiex_send_cmd(priv, HostCmd_CMD_802_11_BG_SCAN_QUERY,
 329                                        HostCmd_ACT_GEN_GET, 0, NULL, false);
 330                 break;
 331
 332         case EVENT_PORT_RELEASE:
 333                 dev_dbg(adapter->dev, "event: PORT RELEASE\n");
 334                 break;
 335
 336         case EVENT_EXT_SCAN_REPORT:
 337                 dev_dbg(adapter->dev, "event: EXT_SCAN Report\n");
 338                 if (adapter->ext_scan)
 339                         ret = mwifiex_handle_event_ext_scan_report(priv,
 340                                                 adapter->event_skb->data);
 341
 342                 break;
 343
 344         case EVENT_WMM_STATUS_CHANGE:
 345                 dev_dbg(adapter->dev, "event: WMM status changed\n");
 346                 ret = mwifiex_send_cmd(priv, HostCmd_CMD_WMM_GET_STATUS,
 347                                        0, 0, NULL, false);
 348                 break;
 349
 350         case EVENT_RSSI_LOW:
 351                 cfg80211_cqm_rssi_notify(priv->netdev,
 352                                          NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
 353                                          GFP_KERNEL);
 354                 mwifiex_send_cmd(priv, HostCmd_CMD_RSSI_INFO,
 355                                  HostCmd_ACT_GEN_GET, 0, NULL, false);
 356                 priv->subsc_evt_rssi_state = RSSI_LOW_RECVD;
 357                 dev_dbg(adapter->dev, "event: Beacon RSSI_LOW\n");
 358                 break;
 359         case EVENT_SNR_LOW:
 360                 dev_dbg(adapter->dev, "event: Beacon SNR_LOW\n");
 361                 break;
 362         case EVENT_MAX_FAIL:
 363                 dev_dbg(adapter->dev, "event: MAX_FAIL\n");
 364                 break;
 365         case EVENT_RSSI_HIGH:
 366                 cfg80211_cqm_rssi_notify(priv->netdev,
 367                                          NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
 368                                          GFP_KERNEL);
 369                 mwifiex_send_cmd(priv, HostCmd_CMD_RSSI_INFO,
 370                                  HostCmd_ACT_GEN_GET, 0, NULL, false);
 371                 priv->subsc_evt_rssi_state = RSSI_HIGH_RECVD;
 372                 dev_dbg(adapter->dev, "event: Beacon RSSI_HIGH\n");
 373                 break;
 374         case EVENT_SNR_HIGH:
 375                 dev_dbg(adapter->dev, "event: Beacon SNR_HIGH\n");
 376                 break;
 377         case EVENT_DATA_RSSI_LOW:
 378                 dev_dbg(adapter->dev, "event: Data RSSI_LOW\n");
 379                 break;
 380         case EVENT_DATA_SNR_LOW:
 381                 dev_dbg(adapter->dev, "event: Data SNR_LOW\n");
 382                 break;
 383         case EVENT_DATA_RSSI_HIGH:
 384                 dev_dbg(adapter->dev, "event: Data RSSI_HIGH\n");
 385                 break;
 386         case EVENT_DATA_SNR_HIGH:
 387                 dev_dbg(adapter->dev, "event: Data SNR_HIGH\n");
 388                 break;
 389         case EVENT_LINK_QUALITY:
 390                 dev_dbg(adapter->dev, "event: Link Quality\n");
 391                 break;
 392         case EVENT_PRE_BEACON_LOST:
 393                 dev_dbg(adapter->dev, "event: Pre-Beacon Lost\n");
 394                 break;
 395         case EVENT_IBSS_COALESCED:
 396                 dev_dbg(adapter->dev, "event: IBSS_COALESCED\n");
 397                 ret = mwifiex_send_cmd(priv,
 398                                 HostCmd_CMD_802_11_IBSS_COALESCING_STATUS,
 399                                 HostCmd_ACT_GEN_GET, 0, NULL, false);
 400                 break;
 401         case EVENT_ADDBA:
 402                 dev_dbg(adapter->dev, "event: ADDBA Request\n");
 403                 mwifiex_send_cmd(priv, HostCmd_CMD_11N_ADDBA_RSP,
 404                                  HostCmd_ACT_GEN_SET, 0,
 405                                  adapter->event_body, false);
 406                 break;
 407         case EVENT_DELBA:
 408                 dev_dbg(adapter->dev, "event: DELBA Request\n");
 409                 mwifiex_11n_delete_ba_stream(priv, adapter->event_body);
 410                 break;
 411         case EVENT_BA_STREAM_TIEMOUT:
 412                 dev_dbg(adapter->dev, "event:  BA Stream timeout\n");
 413                 mwifiex_11n_ba_stream_timeout(priv,
 414                                               (struct host_cmd_ds_11n_batimeout
 415                                                *)
 416                                               adapter->event_body);
 417                 break;
 418         case EVENT_AMSDU_AGGR_CTRL:
 419                 ctrl = le16_to_cpu(*(__le16 *)adapter->event_body);
 420                 dev_dbg(adapter->dev, "event: AMSDU_AGGR_CTRL %d\n", ctrl);
 421
 422                 adapter->tx_buf_size =
 423                                 min_t(u16, adapter->curr_tx_buf_size, ctrl);
 424                 dev_dbg(adapter->dev, "event: tx_buf_size %d\n",
 425                         adapter->tx_buf_size);
 426                 break;
 427
 428         case EVENT_WEP_ICV_ERR:
 429                 dev_dbg(adapter->dev, "event: WEP ICV error\n");
 430                 break;
 431
 432         case EVENT_BW_CHANGE:
 433                 dev_dbg(adapter->dev, "event: BW Change\n");
 434                 break;
 435
 436         case EVENT_HOSTWAKE_STAIE:
 437                 dev_dbg(adapter->dev, "event: HOSTWAKE_STAIE %d\n", eventcause);
 438                 break;
 439
 440         case EVENT_REMAIN_ON_CHAN_EXPIRED:
 441                 dev_dbg(adapter->dev, "event: Remain on channel expired\n");
 442                 cfg80211_remain_on_channel_expired(priv->wdev,
 443                                                    priv->roc_cfg.cookie,
 444                                                    &priv->roc_cfg.chan,
 445                                                    GFP_ATOMIC);
 446
 447                 memset(&priv->roc_cfg, 0x00, sizeof(struct mwifiex_roc_cfg));
 448
 449                 break;
 450
 451         case EVENT_CHANNEL_SWITCH_ANN:
 452                 dev_dbg(adapter->dev, "event: Channel Switch Announcement\n");
 453                 priv->csa_expire_time =
 454                                 jiffies + msecs_to_jiffies(DFS_CHAN_MOVE_TIME);
 455                 priv->csa_chan = priv->curr_bss_params.bss_descriptor.channel;
 456                 ret = mwifiex_send_cmd(priv, HostCmd_CMD_802_11_DEAUTHENTICATE,
 457                         HostCmd_ACT_GEN_SET, 0,
 458                         priv->curr_bss_params.bss_descriptor.mac_address,
 459                         false);
 460                 break;
 461
 462         default:
 463                 dev_dbg(adapter->dev, "event: unknown event id: %#x\n",
 464                         eventcause);
 465                 break;
 466         }
 467
 468         return ret;
 469 }