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 = MWIFIEX_ENCRYPTION_MODE_NONE;
  80
  81         /* Enable auto data rate */
  82         priv->is_data_rate_auto = true;
  83         priv->data_rate = 0;
  84
  85         if (priv->bss_mode == MWIFIEX_BSS_MODE_IBSS) {
  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 mwifiex_802_11_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         if (!priv->disconnect) {
 119                 priv->disconnect = 1;
 120                 dev_dbg(adapter->dev, "info: successfully disconnected from"
 121                                 " %pM: reason code %d\n", priv->cfg_bssid,
 122                                 WLAN_REASON_DEAUTH_LEAVING);
 123                 cfg80211_disconnected(priv->netdev,
 124                                 WLAN_REASON_DEAUTH_LEAVING, NULL, 0,
 125                                 GFP_KERNEL);
 126                 queue_work(priv->workqueue, &priv->cfg_workqueue);
 127         }
 128         if (!netif_queue_stopped(priv->netdev))
 129                 netif_stop_queue(priv->netdev);
 130         if (netif_carrier_ok(priv->netdev))
 131                 netif_carrier_off(priv->netdev);
 132         /* Reset wireless stats signal info */
 133         priv->w_stats.qual.level = 0;
 134         priv->w_stats.qual.noise = 0;
 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
 194         switch (eventcause) {
 195         case EVENT_DUMMY_HOST_WAKEUP_SIGNAL:
 196                 dev_err(adapter->dev, "invalid EVENT: DUMMY_HOST_WAKEUP_SIGNAL,"
 197                                 " ignoring it\n");
 198                 break;
 199         case EVENT_LINK_SENSED:
 200                 dev_dbg(adapter->dev, "event: LINK_SENSED\n");
 201                 if (!netif_carrier_ok(priv->netdev))
 202                         netif_carrier_on(priv->netdev);
 203                 if (netif_queue_stopped(priv->netdev))
 204                         netif_wake_queue(priv->netdev);
 205                 break;
 206
 207         case EVENT_DEAUTHENTICATED:
 208                 dev_dbg(adapter->dev, "event: Deauthenticated\n");
 209                 adapter->dbg.num_event_deauth++;
 210                 if (priv->media_connected)
 211                         mwifiex_reset_connect_state(priv);
 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                         mwifiex_reset_connect_state(priv);
 219                 break;
 220
 221         case EVENT_LINK_LOST:
 222                 dev_dbg(adapter->dev, "event: Link lost\n");
 223                 adapter->dbg.num_event_link_lost++;
 224                 if (priv->media_connected)
 225                         mwifiex_reset_connect_state(priv);
 226                 break;
 227
 228         case EVENT_PS_SLEEP:
 229                 dev_dbg(adapter->dev, "info: EVENT: SLEEP\n");
 230
 231                 adapter->ps_state = PS_STATE_PRE_SLEEP;
 232
 233                 mwifiex_check_ps_cond(adapter);
 234                 break;
 235
 236         case EVENT_PS_AWAKE:
 237                 dev_dbg(adapter->dev, "info: EVENT: AWAKE\n");
 238                 if (!adapter->pps_uapsd_mode &&
 239                         priv->media_connected &&
 240                         adapter->sleep_period.period) {
 241                                 adapter->pps_uapsd_mode = true;
 242                                 dev_dbg(adapter->dev,
 243                                         "event: PPS/UAPSD mode activated\n");
 244                 }
 245                 adapter->tx_lock_flag = false;
 246                 if (adapter->pps_uapsd_mode && adapter->gen_null_pkt) {
 247                         if (mwifiex_check_last_packet_indication(priv)) {
 248                                 if (!adapter->data_sent) {
 249                                         if (!mwifiex_send_null_packet(priv,
 250                                         MWIFIEX_TxPD_POWER_MGMT_NULL_PACKET
 251                                         |
 252                                         MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET))
 253                                                 adapter->ps_state =
 254                                                         PS_STATE_SLEEP;
 255                                         return 0;
 256                                 }
 257                         }
 258                 }
 259                 adapter->ps_state = PS_STATE_AWAKE;
 260                 adapter->pm_wakeup_card_req = false;
 261                 adapter->pm_wakeup_fw_try = false;
 262
 263                 break;
 264
 265         case EVENT_DEEP_SLEEP_AWAKE:
 266                 adapter->if_ops.wakeup_complete(adapter);
 267                 dev_dbg(adapter->dev, "event: DS_AWAKE\n");
 268                 if (adapter->is_deep_sleep)
 269                         adapter->is_deep_sleep = false;
 270                 break;
 271
 272         case EVENT_HS_ACT_REQ:
 273                 dev_dbg(adapter->dev, "event: HS_ACT_REQ\n");
 274                 ret = mwifiex_prepare_cmd(priv, HostCmd_CMD_802_11_HS_CFG_ENH,
 275                                           0, 0, NULL, NULL);
 276                 break;
 277
 278         case EVENT_MIC_ERR_UNICAST:
 279                 dev_dbg(adapter->dev, "event: UNICAST MIC ERROR\n");
 280                 break;
 281
 282         case EVENT_MIC_ERR_MULTICAST:
 283                 dev_dbg(adapter->dev, "event: MULTICAST MIC ERROR\n");
 284                 break;
 285         case EVENT_MIB_CHANGED:
 286         case EVENT_INIT_DONE:
 287                 break;
 288
 289         case EVENT_ADHOC_BCN_LOST:
 290                 dev_dbg(adapter->dev, "event: ADHOC_BCN_LOST\n");
 291                 priv->adhoc_is_link_sensed = false;
 292                 mwifiex_clean_txrx(priv);
 293                 if (!netif_queue_stopped(priv->netdev))
 294                         netif_stop_queue(priv->netdev);
 295                 if (netif_carrier_ok(priv->netdev))
 296                         netif_carrier_off(priv->netdev);
 297                 break;
 298
 299         case EVENT_BG_SCAN_REPORT:
 300                 dev_dbg(adapter->dev, "event: BGS_REPORT\n");
 301                 /* Clear the previous scan result */
 302                 memset(adapter->scan_table, 0x00,
 303                        sizeof(struct mwifiex_bssdescriptor) * IW_MAX_AP);
 304                 adapter->num_in_scan_table = 0;
 305                 adapter->bcn_buf_end = adapter->bcn_buf;
 306                 ret = mwifiex_prepare_cmd(priv,
 307                                           HostCmd_CMD_802_11_BG_SCAN_QUERY,
 308                                           HostCmd_ACT_GEN_GET, 0, NULL, NULL);
 309                 break;
 310
 311         case EVENT_PORT_RELEASE:
 312                 dev_dbg(adapter->dev, "event: PORT RELEASE\n");
 313                 break;
 314
 315         case EVENT_WMM_STATUS_CHANGE:
 316                 dev_dbg(adapter->dev, "event: WMM status changed\n");
 317                 ret = mwifiex_prepare_cmd(priv, HostCmd_CMD_WMM_GET_STATUS,
 318                                           0, 0, NULL, NULL);
 319                 break;
 320
 321         case EVENT_RSSI_LOW:
 322                 dev_dbg(adapter->dev, "event: Beacon RSSI_LOW\n");
 323                 break;
 324         case EVENT_SNR_LOW:
 325                 dev_dbg(adapter->dev, "event: Beacon SNR_LOW\n");
 326                 break;
 327         case EVENT_MAX_FAIL:
 328                 dev_dbg(adapter->dev, "event: MAX_FAIL\n");
 329                 break;
 330         case EVENT_RSSI_HIGH:
 331                 dev_dbg(adapter->dev, "event: Beacon RSSI_HIGH\n");
 332                 break;
 333         case EVENT_SNR_HIGH:
 334                 dev_dbg(adapter->dev, "event: Beacon SNR_HIGH\n");
 335                 break;
 336         case EVENT_DATA_RSSI_LOW:
 337                 dev_dbg(adapter->dev, "event: Data RSSI_LOW\n");
 338                 break;
 339         case EVENT_DATA_SNR_LOW:
 340                 dev_dbg(adapter->dev, "event: Data SNR_LOW\n");
 341                 break;
 342         case EVENT_DATA_RSSI_HIGH:
 343                 dev_dbg(adapter->dev, "event: Data RSSI_HIGH\n");
 344                 break;
 345         case EVENT_DATA_SNR_HIGH:
 346                 dev_dbg(adapter->dev, "event: Data SNR_HIGH\n");
 347                 break;
 348         case EVENT_LINK_QUALITY:
 349                 dev_dbg(adapter->dev, "event: Link Quality\n");
 350                 break;
 351         case EVENT_PRE_BEACON_LOST:
 352                 dev_dbg(adapter->dev, "event: Pre-Beacon Lost\n");
 353                 break;
 354         case EVENT_IBSS_COALESCED:
 355                 dev_dbg(adapter->dev, "event: IBSS_COALESCED\n");
 356                 ret = mwifiex_prepare_cmd(priv,
 357                                 HostCmd_CMD_802_11_IBSS_COALESCING_STATUS,
 358                                 HostCmd_ACT_GEN_GET, 0, NULL, NULL);
 359                 break;
 360         case EVENT_ADDBA:
 361                 dev_dbg(adapter->dev, "event: ADDBA Request\n");
 362                 mwifiex_prepare_cmd(priv, HostCmd_CMD_11N_ADDBA_RSP,
 363                                     HostCmd_ACT_GEN_SET, 0, NULL,
 364                                     adapter->event_body);
 365                 break;
 366         case EVENT_DELBA:
 367                 dev_dbg(adapter->dev, "event: DELBA Request\n");
 368                 mwifiex_11n_delete_ba_stream(priv, adapter->event_body);
 369                 break;
 370         case EVENT_BA_STREAM_TIEMOUT:
 371                 dev_dbg(adapter->dev, "event:  BA Stream timeout\n");
 372                 mwifiex_11n_ba_stream_timeout(priv,
 373                                               (struct host_cmd_ds_11n_batimeout
 374                                                *)
 375                                               adapter->event_body);
 376                 break;
 377         case EVENT_AMSDU_AGGR_CTRL:
 378                 dev_dbg(adapter->dev, "event:  AMSDU_AGGR_CTRL %d\n",
 379                        *(u16 *) adapter->event_body);
 380                 adapter->tx_buf_size =
 381                         min(adapter->curr_tx_buf_size,
 382                             le16_to_cpu(*(__le16 *) adapter->event_body));
 383                 dev_dbg(adapter->dev, "event: tx_buf_size %d\n",
 384                                 adapter->tx_buf_size);
 385                 break;
 386
 387         case EVENT_WEP_ICV_ERR:
 388                 dev_dbg(adapter->dev, "event: WEP ICV error\n");
 389                 break;
 390
 391         case EVENT_BW_CHANGE:
 392                 dev_dbg(adapter->dev, "event: BW Change\n");
 393                 break;
 394
 395         case EVENT_HOSTWAKE_STAIE:
 396                 dev_dbg(adapter->dev, "event: HOSTWAKE_STAIE %d\n", eventcause);
 397                 break;
 398         default:
 399                 dev_dbg(adapter->dev, "event: unknown event id: %#x\n",
 400                                                 eventcause);
 401                 break;
 402         }
 403
 404         return ret;
 405 }