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)
  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, WLAN_REASON_DEAUTH_LEAVING);
 121         if (priv->bss_mode == NL80211_IFTYPE_STATION) {
 122                 cfg80211_disconnected(priv->netdev, WLAN_REASON_DEAUTH_LEAVING,
 123                                       NULL, 0, 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 len, ret = 0;
 188         u32 eventcause = adapter->event_cause;
 189         struct station_info sinfo;
 190         struct mwifiex_assoc_event *event;
 191
 192         switch (eventcause) {
 193         case EVENT_DUMMY_HOST_WAKEUP_SIGNAL:
 194                 dev_err(adapter->dev,
 195                         "invalid EVENT: DUMMY_HOST_WAKEUP_SIGNAL, ignore it\n");
 196                 break;
 197         case EVENT_LINK_SENSED:
 198                 dev_dbg(adapter->dev, "event: LINK_SENSED\n");
 199                 if (!netif_carrier_ok(priv->netdev))
 200                         netif_carrier_on(priv->netdev);
 201                 if (netif_queue_stopped(priv->netdev))
 202                         mwifiex_wake_up_net_dev_queue(priv->netdev, adapter);
 203                 break;
 204
 205         case EVENT_DEAUTHENTICATED:
 206                 dev_dbg(adapter->dev, "event: Deauthenticated\n");
 207                 adapter->dbg.num_event_deauth++;
 208                 if (priv->media_connected)
 209                         mwifiex_reset_connect_state(priv);
 210                 break;
 211
 212         case EVENT_DISASSOCIATED:
 213                 dev_dbg(adapter->dev, "event: Disassociated\n");
 214                 adapter->dbg.num_event_disassoc++;
 215                 if (priv->media_connected)
 216                         mwifiex_reset_connect_state(priv);
 217                 break;
 218
 219         case EVENT_LINK_LOST:
 220                 dev_dbg(adapter->dev, "event: Link lost\n");
 221                 adapter->dbg.num_event_link_lost++;
 222                 if (priv->media_connected)
 223                         mwifiex_reset_connect_state(priv);
 224                 break;
 225
 226         case EVENT_PS_SLEEP:
 227                 dev_dbg(adapter->dev, "info: EVENT: SLEEP\n");
 228
 229                 adapter->ps_state = PS_STATE_PRE_SLEEP;
 230
 231                 mwifiex_check_ps_cond(adapter);
 232                 break;
 233
 234         case EVENT_PS_AWAKE:
 235                 dev_dbg(adapter->dev, "info: EVENT: AWAKE\n");
 236                 if (!adapter->pps_uapsd_mode &&
 237                     priv->media_connected && adapter->sleep_period.period) {
 238                                 adapter->pps_uapsd_mode = true;
 239                                 dev_dbg(adapter->dev,
 240                                         "event: PPS/UAPSD mode activated\n");
 241                 }
 242                 adapter->tx_lock_flag = false;
 243                 if (adapter->pps_uapsd_mode && adapter->gen_null_pkt) {
 244                         if (mwifiex_check_last_packet_indication(priv)) {
 245                                 if (adapter->data_sent) {
 246                                         adapter->ps_state = PS_STATE_AWAKE;
 247                                         adapter->pm_wakeup_card_req = false;
 248                                         adapter->pm_wakeup_fw_try = false;
 249                                         break;
 250                                 }
 251                                 if (!mwifiex_send_null_packet
 252                                         (priv,
 253                                          MWIFIEX_TxPD_POWER_MGMT_NULL_PACKET |
 254                                          MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET))
 255                                                 adapter->ps_state =
 256                                                         PS_STATE_SLEEP;
 257                                         return 0;
 258                         }
 259                 }
 260                 adapter->ps_state = PS_STATE_AWAKE;
 261                 adapter->pm_wakeup_card_req = false;
 262                 adapter->pm_wakeup_fw_try = false;
 263
 264                 break;
 265
 266         case EVENT_DEEP_SLEEP_AWAKE:
 267                 adapter->if_ops.wakeup_complete(adapter);
 268                 dev_dbg(adapter->dev, "event: DS_AWAKE\n");
 269                 if (adapter->is_deep_sleep)
 270                         adapter->is_deep_sleep = false;
 271                 break;
 272
 273         case EVENT_HS_ACT_REQ:
 274                 dev_dbg(adapter->dev, "event: HS_ACT_REQ\n");
 275                 ret = mwifiex_send_cmd_async(priv,
 276                                              HostCmd_CMD_802_11_HS_CFG_ENH,
 277                                              0, 0, NULL);
 278                 break;
 279
 280         case EVENT_MIC_ERR_UNICAST:
 281                 dev_dbg(adapter->dev, "event: UNICAST MIC ERROR\n");
 282                 break;
 283
 284         case EVENT_MIC_ERR_MULTICAST:
 285                 dev_dbg(adapter->dev, "event: MULTICAST MIC ERROR\n");
 286                 break;
 287         case EVENT_MIB_CHANGED:
 288         case EVENT_INIT_DONE:
 289                 break;
 290
 291         case EVENT_ADHOC_BCN_LOST:
 292                 dev_dbg(adapter->dev, "event: ADHOC_BCN_LOST\n");
 293                 priv->adhoc_is_link_sensed = false;
 294                 mwifiex_clean_txrx(priv);
 295                 if (!netif_queue_stopped(priv->netdev))
 296                         mwifiex_stop_net_dev_queue(priv->netdev, adapter);
 297                 if (netif_carrier_ok(priv->netdev))
 298                         netif_carrier_off(priv->netdev);
 299                 break;
 300
 301         case EVENT_BG_SCAN_REPORT:
 302                 dev_dbg(adapter->dev, "event: BGS_REPORT\n");
 303                 ret = mwifiex_send_cmd_async(priv,
 304                                              HostCmd_CMD_802_11_BG_SCAN_QUERY,
 305                                              HostCmd_ACT_GEN_GET, 0, NULL);
 306                 break;
 307
 308         case EVENT_PORT_RELEASE:
 309                 dev_dbg(adapter->dev, "event: PORT RELEASE\n");
 310                 break;
 311
 312         case EVENT_WMM_STATUS_CHANGE:
 313                 dev_dbg(adapter->dev, "event: WMM status changed\n");
 314                 ret = mwifiex_send_cmd_async(priv, HostCmd_CMD_WMM_GET_STATUS,
 315                                              0, 0, NULL);
 316                 break;
 317
 318         case EVENT_RSSI_LOW:
 319                 cfg80211_cqm_rssi_notify(priv->netdev,
 320                                          NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
 321                                          GFP_KERNEL);
 322                 mwifiex_send_cmd_async(priv, HostCmd_CMD_RSSI_INFO,
 323                                        HostCmd_ACT_GEN_GET, 0, NULL);
 324                 priv->subsc_evt_rssi_state = RSSI_LOW_RECVD;
 325                 dev_dbg(adapter->dev, "event: Beacon RSSI_LOW\n");
 326                 break;
 327         case EVENT_SNR_LOW:
 328                 dev_dbg(adapter->dev, "event: Beacon SNR_LOW\n");
 329                 break;
 330         case EVENT_MAX_FAIL:
 331                 dev_dbg(adapter->dev, "event: MAX_FAIL\n");
 332                 break;
 333         case EVENT_RSSI_HIGH:
 334                 cfg80211_cqm_rssi_notify(priv->netdev,
 335                                          NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
 336                                          GFP_KERNEL);
 337                 mwifiex_send_cmd_async(priv, HostCmd_CMD_RSSI_INFO,
 338                                        HostCmd_ACT_GEN_GET, 0, NULL);
 339                 priv->subsc_evt_rssi_state = RSSI_HIGH_RECVD;
 340                 dev_dbg(adapter->dev, "event: Beacon RSSI_HIGH\n");
 341                 break;
 342         case EVENT_SNR_HIGH:
 343                 dev_dbg(adapter->dev, "event: Beacon SNR_HIGH\n");
 344                 break;
 345         case EVENT_DATA_RSSI_LOW:
 346                 dev_dbg(adapter->dev, "event: Data RSSI_LOW\n");
 347                 break;
 348         case EVENT_DATA_SNR_LOW:
 349                 dev_dbg(adapter->dev, "event: Data SNR_LOW\n");
 350                 break;
 351         case EVENT_DATA_RSSI_HIGH:
 352                 dev_dbg(adapter->dev, "event: Data RSSI_HIGH\n");
 353                 break;
 354         case EVENT_DATA_SNR_HIGH:
 355                 dev_dbg(adapter->dev, "event: Data SNR_HIGH\n");
 356                 break;
 357         case EVENT_LINK_QUALITY:
 358                 dev_dbg(adapter->dev, "event: Link Quality\n");
 359                 break;
 360         case EVENT_PRE_BEACON_LOST:
 361                 dev_dbg(adapter->dev, "event: Pre-Beacon Lost\n");
 362                 break;
 363         case EVENT_IBSS_COALESCED:
 364                 dev_dbg(adapter->dev, "event: IBSS_COALESCED\n");
 365                 ret = mwifiex_send_cmd_async(priv,
 366                                 HostCmd_CMD_802_11_IBSS_COALESCING_STATUS,
 367                                 HostCmd_ACT_GEN_GET, 0, NULL);
 368                 break;
 369         case EVENT_ADDBA:
 370                 dev_dbg(adapter->dev, "event: ADDBA Request\n");
 371                 mwifiex_send_cmd_async(priv, HostCmd_CMD_11N_ADDBA_RSP,
 372                                        HostCmd_ACT_GEN_SET, 0,
 373                                        adapter->event_body);
 374                 break;
 375         case EVENT_DELBA:
 376                 dev_dbg(adapter->dev, "event: DELBA Request\n");
 377                 mwifiex_11n_delete_ba_stream(priv, adapter->event_body);
 378                 break;
 379         case EVENT_BA_STREAM_TIEMOUT:
 380                 dev_dbg(adapter->dev, "event:  BA Stream timeout\n");
 381                 mwifiex_11n_ba_stream_timeout(priv,
 382                                               (struct host_cmd_ds_11n_batimeout
 383                                                *)
 384                                               adapter->event_body);
 385                 break;
 386         case EVENT_AMSDU_AGGR_CTRL:
 387                 dev_dbg(adapter->dev, "event:  AMSDU_AGGR_CTRL %d\n",
 388                         *(u16 *) adapter->event_body);
 389                 adapter->tx_buf_size =
 390                         min(adapter->curr_tx_buf_size,
 391                             le16_to_cpu(*(__le16 *) adapter->event_body));
 392                 dev_dbg(adapter->dev, "event: tx_buf_size %d\n",
 393                         adapter->tx_buf_size);
 394                 break;
 395
 396         case EVENT_WEP_ICV_ERR:
 397                 dev_dbg(adapter->dev, "event: WEP ICV error\n");
 398                 break;
 399
 400         case EVENT_BW_CHANGE:
 401                 dev_dbg(adapter->dev, "event: BW Change\n");
 402                 break;
 403
 404         case EVENT_HOSTWAKE_STAIE:
 405                 dev_dbg(adapter->dev, "event: HOSTWAKE_STAIE %d\n", eventcause);
 406                 break;
 407
 408         case EVENT_UAP_STA_ASSOC:
 409                 skb_pull(adapter->event_skb, MWIFIEX_UAP_EVENT_EXTRA_HEADER);
 410                 memset(&sinfo, 0, sizeof(sinfo));
 411                 event = (struct mwifiex_assoc_event *)adapter->event_skb->data;
 412                 if (le16_to_cpu(event->type) == TLV_TYPE_UAP_MGMT_FRAME) {
 413                         len = -1;
 414
 415                         if (ieee80211_is_assoc_req(event->frame_control))
 416                                 len = 0;
 417                         else if (ieee80211_is_reassoc_req(event->frame_control))
 418                                 /* There will be ETH_ALEN bytes of
 419                                  * current_ap_addr before the re-assoc ies.
 420                                  */
 421                                 len = ETH_ALEN;
 422
 423                         if (len != -1) {
 424                                 sinfo.filled = STATION_INFO_ASSOC_REQ_IES;
 425                                 sinfo.assoc_req_ies = &event->data[len];
 426                                 len = (u8 *)sinfo.assoc_req_ies -
 427                                       (u8 *)&event->frame_control;
 428                                 sinfo.assoc_req_ies_len =
 429                                         le16_to_cpu(event->len) - (u16)len;
 430                         }
 431                 }
 432                 cfg80211_new_sta(priv->netdev, event->sta_addr, &sinfo,
 433                                  GFP_KERNEL);
 434                 break;
 435         case EVENT_UAP_STA_DEAUTH:
 436                 skb_pull(adapter->event_skb, MWIFIEX_UAP_EVENT_EXTRA_HEADER);
 437                 cfg80211_del_sta(priv->netdev, adapter->event_skb->data,
 438                                  GFP_KERNEL);
 439                 break;
 440         case EVENT_UAP_BSS_IDLE:
 441                 priv->media_connected = false;
 442                 break;
 443         case EVENT_UAP_BSS_ACTIVE:
 444                 priv->media_connected = true;
 445                 break;
 446         case EVENT_UAP_BSS_START:
 447                 dev_dbg(adapter->dev, "AP EVENT: event id: %#x\n", eventcause);
 448                 memcpy(priv->netdev->dev_addr, adapter->event_body+2, ETH_ALEN);
 449                 break;
 450         case EVENT_UAP_MIC_COUNTERMEASURES:
 451                 /* For future development */
 452                 dev_dbg(adapter->dev, "AP EVENT: event id: %#x\n", eventcause);
 453                 break;
 454         default:
 455                 dev_dbg(adapter->dev, "event: unknown event id: %#x\n",
 456                         eventcause);
 457                 break;
 458         }
 459
 460         return ret;
 461 }