LXR linux/drivers/net/wireless/mwifiex/sta

   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 */
  43void
  44mwifiex_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            priv->bss_mode == NL80211_IFTYPE_P2P_CLIENT) {
 123                cfg80211_disconnected(priv->netdev, reason_code, NULL, 0,
 124                                      GFP_KERNEL);
 125        }
 126        memset(priv->cfg_bssid, 0, ETH_ALEN);
 127
 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 */
 184int 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                mwifiex_wake_up_net_dev_queue(priv->netdev, adapter);
 201                break;
 202
 203        case EVENT_DEAUTHENTICATED:
 204                dev_dbg(adapter->dev, "event: Deauthenticated\n");
 205                if (priv->wps.session_enable) {
 206                        dev_dbg(adapter->dev,
 207                                "info: receive deauth event in wps session\n");
 208                        break;
 209                }
 210                adapter->dbg.num_event_deauth++;
 211                if (priv->media_connected) {
 212                        reason_code =
 213                                le16_to_cpu(*(__le16 *)adapter->event_body);
 214                        mwifiex_reset_connect_state(priv, reason_code);
 215                }
 216                break;
 217
 218        case EVENT_DISASSOCIATED:
 219                dev_dbg(adapter->dev, "event: Disassociated\n");
 220                if (priv->wps.session_enable) {
 221                        dev_dbg(adapter->dev,
 222                                "info: receive disassoc event in wps session\n");
 223                        break;
 224                }
 225                adapter->dbg.num_event_disassoc++;
 226                if (priv->media_connected) {
 227                        reason_code =
 228                                le16_to_cpu(*(__le16 *)adapter->event_body);
 229                        mwifiex_reset_connect_state(priv, reason_code);
 230                }
 231                break;
 232
 233        case EVENT_LINK_LOST:
 234                dev_dbg(adapter->dev, "event: Link lost\n");
 235                adapter->dbg.num_event_link_lost++;
 236                if (priv->media_connected) {
 237                        reason_code =
 238                                le16_to_cpu(*(__le16 *)adapter->event_body);
 239                        mwifiex_reset_connect_state(priv, reason_code);
 240                }
 241                break;
 242
 243        case EVENT_PS_SLEEP:
 244                dev_dbg(adapter->dev, "info: EVENT: SLEEP\n");
 245
 246                adapter->ps_state = PS_STATE_PRE_SLEEP;
 247
 248                mwifiex_check_ps_cond(adapter);
 249                break;
 250
 251        case EVENT_PS_AWAKE:
 252                dev_dbg(adapter->dev, "info: EVENT: AWAKE\n");
 253                if (!adapter->pps_uapsd_mode &&
 254                    priv->media_connected && adapter->sleep_period.period) {
 255                                adapter->pps_uapsd_mode = true;
 256                                dev_dbg(adapter->dev,
 257                                        "event: PPS/UAPSD mode activated\n");
 258                }
 259                adapter->tx_lock_flag = false;
 260                if (adapter->pps_uapsd_mode && adapter->gen_null_pkt) {
 261                        if (mwifiex_check_last_packet_indication(priv)) {
 262                                if (adapter->data_sent) {
 263                                        adapter->ps_state = PS_STATE_AWAKE;
 264                                        adapter->pm_wakeup_card_req = false;
 265                                        adapter->pm_wakeup_fw_try = false;
 266                                        break;
 267                                }
 268                                if (!mwifiex_send_null_packet
 269                                        (priv,
 270                                         MWIFIEX_TxPD_POWER_MGMT_NULL_PACKET |
 271                                         MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET))
 272                                                adapter->ps_state =
 273                                                        PS_STATE_SLEEP;
 274                                        return 0;
 275                        }
 276                }
 277                adapter->ps_state = PS_STATE_AWAKE;
 278                adapter->pm_wakeup_card_req = false;
 279                adapter->pm_wakeup_fw_try = false;
 280
 281                break;
 282
 283        case EVENT_DEEP_SLEEP_AWAKE:
 284                adapter->if_ops.wakeup_complete(adapter);
 285                dev_dbg(adapter->dev, "event: DS_AWAKE\n");
 286                if (adapter->is_deep_sleep)
 287                        adapter->is_deep_sleep = false;
 288                break;
 289
 290        case EVENT_HS_ACT_REQ:
 291                dev_dbg(adapter->dev, "event: HS_ACT_REQ\n");
 292                ret = mwifiex_send_cmd_async(priv,
 293                                             HostCmd_CMD_802_11_HS_CFG_ENH,
 294                                             0, 0, NULL);
 295                break;
 296
 297        case EVENT_MIC_ERR_UNICAST:
 298                dev_dbg(adapter->dev, "event: UNICAST MIC ERROR\n");
 299                cfg80211_michael_mic_failure(priv->netdev, priv->cfg_bssid,
 300                                             NL80211_KEYTYPE_PAIRWISE,
 301                                             -1, NULL, GFP_KERNEL);
 302                break;
 303
 304        case EVENT_MIC_ERR_MULTICAST:
 305                dev_dbg(adapter->dev, "event: MULTICAST MIC ERROR\n");
 306                cfg80211_michael_mic_failure(priv->netdev, priv->cfg_bssid,
 307                                             NL80211_KEYTYPE_GROUP,
 308                                             -1, NULL, GFP_KERNEL);
 309                break;
 310        case EVENT_MIB_CHANGED:
 311        case EVENT_INIT_DONE:
 312                break;
 313
 314        case EVENT_ADHOC_BCN_LOST:
 315                dev_dbg(adapter->dev, "event: ADHOC_BCN_LOST\n");
 316                priv->adhoc_is_link_sensed = false;
 317                mwifiex_clean_txrx(priv);
 318                mwifiex_stop_net_dev_queue(priv->netdev, adapter);
 319                if (netif_carrier_ok(priv->netdev))
 320                        netif_carrier_off(priv->netdev);
 321                break;
 322
 323        case EVENT_BG_SCAN_REPORT:
 324                dev_dbg(adapter->dev, "event: BGS_REPORT\n");
 325                ret = mwifiex_send_cmd_async(priv,
 326                                             HostCmd_CMD_802_11_BG_SCAN_QUERY,
 327                                             HostCmd_ACT_GEN_GET, 0, NULL);
 328                break;
 329
 330        case EVENT_PORT_RELEASE:
 331                dev_dbg(adapter->dev, "event: PORT RELEASE\n");
 332                break;
 333
 334        case EVENT_WMM_STATUS_CHANGE:
 335                dev_dbg(adapter->dev, "event: WMM status changed\n");
 336                ret = mwifiex_send_cmd_async(priv, HostCmd_CMD_WMM_GET_STATUS,
 337                                             0, 0, NULL);
 338                break;
 339
 340        case EVENT_RSSI_LOW:
 341                cfg80211_cqm_rssi_notify(priv->netdev,
 342                                         NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
 343                                         GFP_KERNEL);
 344                mwifiex_send_cmd_async(priv, HostCmd_CMD_RSSI_INFO,
 345                                       HostCmd_ACT_GEN_GET, 0, NULL);
 346                priv->subsc_evt_rssi_state = RSSI_LOW_RECVD;
 347                dev_dbg(adapter->dev, "event: Beacon RSSI_LOW\n");
 348                break;
 349        case EVENT_SNR_LOW:
 350                dev_dbg(adapter->dev, "event: Beacon SNR_LOW\n");
 351                break;
 352        case EVENT_MAX_FAIL:
 353                dev_dbg(adapter->dev, "event: MAX_FAIL\n");
 354                break;
 355        case EVENT_RSSI_HIGH:
 356                cfg80211_cqm_rssi_notify(priv->netdev,
 357                                         NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
 358                                         GFP_KERNEL);
 359                mwifiex_send_cmd_async(priv, HostCmd_CMD_RSSI_INFO,
 360                                       HostCmd_ACT_GEN_GET, 0, NULL);
 361                priv->subsc_evt_rssi_state = RSSI_HIGH_RECVD;
 362                dev_dbg(adapter->dev, "event: Beacon RSSI_HIGH\n");
 363                break;
 364        case EVENT_SNR_HIGH:
 365                dev_dbg(adapter->dev, "event: Beacon SNR_HIGH\n");
 366                break;
 367        case EVENT_DATA_RSSI_LOW:
 368                dev_dbg(adapter->dev, "event: Data RSSI_LOW\n");
 369                break;
 370        case EVENT_DATA_SNR_LOW:
 371                dev_dbg(adapter->dev, "event: Data SNR_LOW\n");
 372                break;
 373        case EVENT_DATA_RSSI_HIGH:
 374                dev_dbg(adapter->dev, "event: Data RSSI_HIGH\n");
 375                break;
 376        case EVENT_DATA_SNR_HIGH:
 377                dev_dbg(adapter->dev, "event: Data SNR_HIGH\n");
 378                break;
 379        case EVENT_LINK_QUALITY:
 380                dev_dbg(adapter->dev, "event: Link Quality\n");
 381                break;
 382        case EVENT_PRE_BEACON_LOST:
 383                dev_dbg(adapter->dev, "event: Pre-Beacon Lost\n");
 384                break;
 385        case EVENT_IBSS_COALESCED:
 386                dev_dbg(adapter->dev, "event: IBSS_COALESCED\n");
 387                ret = mwifiex_send_cmd_async(priv,
 388                                HostCmd_CMD_802_11_IBSS_COALESCING_STATUS,
 389                                HostCmd_ACT_GEN_GET, 0, NULL);
 390                break;
 391        case EVENT_ADDBA:
 392                dev_dbg(adapter->dev, "event: ADDBA Request\n");
 393                mwifiex_send_cmd_async(priv, HostCmd_CMD_11N_ADDBA_RSP,
 394                                       HostCmd_ACT_GEN_SET, 0,
 395                                       adapter->event_body);
 396                break;
 397        case EVENT_DELBA:
 398                dev_dbg(adapter->dev, "event: DELBA Request\n");
 399                mwifiex_11n_delete_ba_stream(priv, adapter->event_body);
 400                break;
 401        case EVENT_BA_STREAM_TIEMOUT:
 402                dev_dbg(adapter->dev, "event:  BA Stream timeout\n");
 403                mwifiex_11n_ba_stream_timeout(priv,
 404                                              (struct host_cmd_ds_11n_batimeout
 405                                               *)
 406                                              adapter->event_body);
 407                break;
 408        case EVENT_AMSDU_AGGR_CTRL:
 409                ctrl = le16_to_cpu(*(__le16 *)adapter->event_body);
 410                dev_dbg(adapter->dev, "event: AMSDU_AGGR_CTRL %d\n", ctrl);
 411
 412                adapter->tx_buf_size =
 413                                min_t(u16, adapter->curr_tx_buf_size, ctrl);
 414                dev_dbg(adapter->dev, "event: tx_buf_size %d\n",
 415                        adapter->tx_buf_size);
 416                break;
 417
 418        case EVENT_WEP_ICV_ERR:
 419                dev_dbg(adapter->dev, "event: WEP ICV error\n");
 420                break;
 421
 422        case EVENT_BW_CHANGE:
 423                dev_dbg(adapter->dev, "event: BW Change\n");
 424                break;
 425
 426        case EVENT_HOSTWAKE_STAIE:
 427                dev_dbg(adapter->dev, "event: HOSTWAKE_STAIE %d\n", eventcause);
 428                break;
 429
 430        case EVENT_REMAIN_ON_CHAN_EXPIRED:
 431                dev_dbg(adapter->dev, "event: Remain on channel expired\n");
 432                cfg80211_remain_on_channel_expired(priv->wdev,
 433                                                   priv->roc_cfg.cookie,
 434                                                   &priv->roc_cfg.chan,
 435                                                   GFP_ATOMIC);
 436
 437                memset(&priv->roc_cfg, 0x00, sizeof(struct mwifiex_roc_cfg));
 438
 439                break;
 440
 441        case EVENT_CHANNEL_SWITCH_ANN:
 442                dev_dbg(adapter->dev, "event: Channel Switch Announcement\n");
 443                priv->csa_expire_time =
 444                                jiffies + msecs_to_jiffies(DFS_CHAN_MOVE_TIME);
 445                priv->csa_chan = priv->curr_bss_params.bss_descriptor.channel;
 446                ret = mwifiex_send_cmd_async(priv,
 447                        HostCmd_CMD_802_11_DEAUTHENTICATE,
 448                        HostCmd_ACT_GEN_SET, 0,
 449                        priv->curr_bss_params.bss_descriptor.mac_address);
 450                break;
 451
 452        default:
 453                dev_dbg(adapter->dev, "event: unknown event id: %#x\n",
 454                        eventcause);
 455                break;
 456        }
 457
 458        return ret;
 459}
 460