/* * Marvell Wireless LAN device driver: station event handling * * Copyright (C) 2011, Marvell International Ltd. * * This software file (the "File") is distributed by Marvell International * Ltd. under the terms of the GNU General Public License Version 2, June 1991 * (the "License"). You may use, redistribute and/or modify this File in * accordance with the terms and conditions of the License, a copy of which * is available by writing to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt. * * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE * ARE EXPRESSLY DISCLAIMED. The License provides additional details about * this warranty disclaimer. */ #include "decl.h" #include "ioctl.h" #include "util.h" #include "fw.h" #include "main.h" #include "wmm.h" #include "11n.h" /* * This function resets the connection state. * * The function is invoked after receiving a disconnect event from firmware, * and performs the following actions - * - Set media status to disconnected * - Clean up Tx and Rx packets * - Resets SNR/NF/RSSI value in driver * - Resets security configurations in driver * - Enables auto data rate * - Saves the previous SSID and BSSID so that they can * be used for re-association, if required * - Erases current SSID and BSSID information * - Sends a disconnect event to upper layers/applications. */ void mwifiex_reset_connect_state(struct mwifiex_private *priv, u16 reason_code) { struct mwifiex_adapter *adapter = priv->adapter; if (!priv->media_connected) return; dev_dbg(adapter->dev, "info: handles disconnect event\n"); priv->media_connected = false; priv->scan_block = false; /* Free Tx and Rx packets, report disconnect to upper layer */ mwifiex_clean_txrx(priv); /* Reset SNR/NF/RSSI values */ priv->data_rssi_last = 0; priv->data_nf_last = 0; priv->data_rssi_avg = 0; priv->data_nf_avg = 0; priv->bcn_rssi_last = 0; priv->bcn_nf_last = 0; priv->bcn_rssi_avg = 0; priv->bcn_nf_avg = 0; priv->rxpd_rate = 0; priv->rxpd_htinfo = 0; priv->sec_info.wpa_enabled = false; priv->sec_info.wpa2_enabled = false; priv->wpa_ie_len = 0; priv->sec_info.wapi_enabled = false; priv->wapi_ie_len = 0; priv->sec_info.wapi_key_on = false; priv->sec_info.encryption_mode = 0; /* Enable auto data rate */ priv->is_data_rate_auto = true; priv->data_rate = 0; if (priv->bss_mode == NL80211_IFTYPE_ADHOC) { priv->adhoc_state = ADHOC_IDLE; priv->adhoc_is_link_sensed = false; } /* * Memorize the previous SSID and BSSID so * it could be used for re-assoc */ dev_dbg(adapter->dev, "info: previous SSID=%s, SSID len=%u\n", priv->prev_ssid.ssid, priv->prev_ssid.ssid_len); dev_dbg(adapter->dev, "info: current SSID=%s, SSID len=%u\n", priv->curr_bss_params.bss_descriptor.ssid.ssid, priv->curr_bss_params.bss_descriptor.ssid.ssid_len); memcpy(&priv->prev_ssid, &priv->curr_bss_params.bss_descriptor.ssid, sizeof(struct cfg80211_ssid)); memcpy(priv->prev_bssid, priv->curr_bss_params.bss_descriptor.mac_address, ETH_ALEN); /* Need to erase the current SSID and BSSID info */ memset(&priv->curr_bss_params, 0x00, sizeof(priv->curr_bss_params)); adapter->tx_lock_flag = false; adapter->pps_uapsd_mode = false; if (adapter->num_cmd_timeout && adapter->curr_cmd) return; priv->media_connected = false; dev_dbg(adapter->dev, "info: successfully disconnected from %pM: reason code %d\n", priv->cfg_bssid, reason_code); if (priv->bss_mode == NL80211_IFTYPE_STATION) { cfg80211_disconnected(priv->netdev, reason_code, NULL, 0, GFP_KERNEL); } memset(priv->cfg_bssid, 0, ETH_ALEN); if (!netif_queue_stopped(priv->netdev)) mwifiex_stop_net_dev_queue(priv->netdev, adapter); if (netif_carrier_ok(priv->netdev)) netif_carrier_off(priv->netdev); } /* * This function handles events generated by firmware. * * This is a generic function and handles all events. * * Event specific routines are called by this function based * upon the generated event cause. * * For the following events, the function just forwards them to upper * layers, optionally recording the change - * - EVENT_LINK_SENSED * - EVENT_MIC_ERR_UNICAST * - EVENT_MIC_ERR_MULTICAST * - EVENT_PORT_RELEASE * - EVENT_RSSI_LOW * - EVENT_SNR_LOW * - EVENT_MAX_FAIL * - EVENT_RSSI_HIGH * - EVENT_SNR_HIGH * - EVENT_DATA_RSSI_LOW * - EVENT_DATA_SNR_LOW * - EVENT_DATA_RSSI_HIGH * - EVENT_DATA_SNR_HIGH * - EVENT_LINK_QUALITY * - EVENT_PRE_BEACON_LOST * - EVENT_IBSS_COALESCED * - EVENT_WEP_ICV_ERR * - EVENT_BW_CHANGE * - EVENT_HOSTWAKE_STAIE * * For the following events, no action is taken - * - EVENT_MIB_CHANGED * - EVENT_INIT_DONE * - EVENT_DUMMY_HOST_WAKEUP_SIGNAL * * Rest of the supported events requires driver handling - * - EVENT_DEAUTHENTICATED * - EVENT_DISASSOCIATED * - EVENT_LINK_LOST * - EVENT_PS_SLEEP * - EVENT_PS_AWAKE * - EVENT_DEEP_SLEEP_AWAKE * - EVENT_HS_ACT_REQ * - EVENT_ADHOC_BCN_LOST * - EVENT_BG_SCAN_REPORT * - EVENT_WMM_STATUS_CHANGE * - EVENT_ADDBA * - EVENT_DELBA * - EVENT_BA_STREAM_TIEMOUT * - EVENT_AMSDU_AGGR_CTRL */ int mwifiex_process_sta_event(struct mwifiex_private *priv) { struct mwifiex_adapter *adapter = priv->adapter; int ret = 0; u32 eventcause = adapter->event_cause; u16 ctrl, reason_code; switch (eventcause) { case EVENT_DUMMY_HOST_WAKEUP_SIGNAL: dev_err(adapter->dev, "invalid EVENT: DUMMY_HOST_WAKEUP_SIGNAL, ignore it\n"); break; case EVENT_LINK_SENSED: dev_dbg(adapter->dev, "event: LINK_SENSED\n"); if (!netif_carrier_ok(priv->netdev)) netif_carrier_on(priv->netdev); if (netif_queue_stopped(priv->netdev)) mwifiex_wake_up_net_dev_queue(priv->netdev, adapter); break; case EVENT_DEAUTHENTICATED: dev_dbg(adapter->dev, "event: Deauthenticated\n"); adapter->dbg.num_event_deauth++; if (priv->media_connected) { reason_code = le16_to_cpu(*(__le16 *)adapter->event_body); mwifiex_reset_connect_state(priv, reason_code); } break; case EVENT_DISASSOCIATED: dev_dbg(adapter->dev, "event: Disassociated\n"); adapter->dbg.num_event_disassoc++; if (priv->media_connected) { reason_code = le16_to_cpu(*(__le16 *)adapter->event_body); mwifiex_reset_connect_state(priv, reason_code); } break; case EVENT_LINK_LOST: dev_dbg(adapter->dev, "event: Link lost\n"); adapter->dbg.num_event_link_lost++; if (priv->media_connected) { reason_code = le16_to_cpu(*(__le16 *)adapter->event_body); mwifiex_reset_connect_state(priv, reason_code); } break; case EVENT_PS_SLEEP: dev_dbg(adapter->dev, "info: EVENT: SLEEP\n"); adapter->ps_state = PS_STATE_PRE_SLEEP; mwifiex_check_ps_cond(adapter); break; case EVENT_PS_AWAKE: dev_dbg(adapter->dev, "info: EVENT: AWAKE\n"); if (!adapter->pps_uapsd_mode && priv->media_connected && adapter->sleep_period.period) { adapter->pps_uapsd_mode = true; dev_dbg(adapter->dev, "event: PPS/UAPSD mode activated\n"); } adapter->tx_lock_flag = false; if (adapter->pps_uapsd_mode && adapter->gen_null_pkt) { if (mwifiex_check_last_packet_indication(priv)) { if (adapter->data_sent) { adapter->ps_state = PS_STATE_AWAKE; adapter->pm_wakeup_card_req = false; adapter->pm_wakeup_fw_try = false; break; } if (!mwifiex_send_null_packet (priv, MWIFIEX_TxPD_POWER_MGMT_NULL_PACKET | MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET)) adapter->ps_state = PS_STATE_SLEEP; return 0; } } adapter->ps_state = PS_STATE_AWAKE; adapter->pm_wakeup_card_req = false; adapter->pm_wakeup_fw_try = false; break; case EVENT_DEEP_SLEEP_AWAKE: adapter->if_ops.wakeup_complete(adapter); dev_dbg(adapter->dev, "event: DS_AWAKE\n"); if (adapter->is_deep_sleep) adapter->is_deep_sleep = false; break; case EVENT_HS_ACT_REQ: dev_dbg(adapter->dev, "event: HS_ACT_REQ\n"); ret = mwifiex_send_cmd_async(priv, HostCmd_CMD_802_11_HS_CFG_ENH, 0, 0, NULL); break; case EVENT_MIC_ERR_UNICAST: dev_dbg(adapter->dev, "event: UNICAST MIC ERROR\n"); cfg80211_michael_mic_failure(priv->netdev, priv->cfg_bssid, NL80211_KEYTYPE_PAIRWISE, -1, NULL, GFP_KERNEL); break; case EVENT_MIC_ERR_MULTICAST: dev_dbg(adapter->dev, "event: MULTICAST MIC ERROR\n"); cfg80211_michael_mic_failure(priv->netdev, priv->cfg_bssid, NL80211_KEYTYPE_GROUP, -1, NULL, GFP_KERNEL); break; case EVENT_MIB_CHANGED: case EVENT_INIT_DONE: break; case EVENT_ADHOC_BCN_LOST: dev_dbg(adapter->dev, "event: ADHOC_BCN_LOST\n"); priv->adhoc_is_link_sensed = false; mwifiex_clean_txrx(priv); if (!netif_queue_stopped(priv->netdev)) mwifiex_stop_net_dev_queue(priv->netdev, adapter); if (netif_carrier_ok(priv->netdev)) netif_carrier_off(priv->netdev); break; case EVENT_BG_SCAN_REPORT: dev_dbg(adapter->dev, "event: BGS_REPORT\n"); ret = mwifiex_send_cmd_async(priv, HostCmd_CMD_802_11_BG_SCAN_QUERY, HostCmd_ACT_GEN_GET, 0, NULL); break; case EVENT_PORT_RELEASE: dev_dbg(adapter->dev, "event: PORT RELEASE\n"); break; case EVENT_WMM_STATUS_CHANGE: dev_dbg(adapter->dev, "event: WMM status changed\n"); ret = mwifiex_send_cmd_async(priv, HostCmd_CMD_WMM_GET_STATUS, 0, 0, NULL); break; case EVENT_RSSI_LOW: cfg80211_cqm_rssi_notify(priv->netdev, NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, GFP_KERNEL); mwifiex_send_cmd_async(priv, HostCmd_CMD_RSSI_INFO, HostCmd_ACT_GEN_GET, 0, NULL); priv->subsc_evt_rssi_state = RSSI_LOW_RECVD; dev_dbg(adapter->dev, "event: Beacon RSSI_LOW\n"); break; case EVENT_SNR_LOW: dev_dbg(adapter->dev, "event: Beacon SNR_LOW\n"); break; case EVENT_MAX_FAIL: dev_dbg(adapter->dev, "event: MAX_FAIL\n"); break; case EVENT_RSSI_HIGH: cfg80211_cqm_rssi_notify(priv->netdev, NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, GFP_KERNEL); mwifiex_send_cmd_async(priv, HostCmd_CMD_RSSI_INFO, HostCmd_ACT_GEN_GET, 0, NULL); priv->subsc_evt_rssi_state = RSSI_HIGH_RECVD; dev_dbg(adapter->dev, "event: Beacon RSSI_HIGH\n"); break; case EVENT_SNR_HIGH: dev_dbg(adapter->dev, "event: Beacon SNR_HIGH\n"); break; case EVENT_DATA_RSSI_LOW: dev_dbg(adapter->dev, "event: Data RSSI_LOW\n"); break; case EVENT_DATA_SNR_LOW: dev_dbg(adapter->dev, "event: Data SNR_LOW\n"); break; case EVENT_DATA_RSSI_HIGH: dev_dbg(adapter->dev, "event: Data RSSI_HIGH\n"); break; case EVENT_DATA_SNR_HIGH: dev_dbg(adapter->dev, "event: Data SNR_HIGH\n"); break; case EVENT_LINK_QUALITY: dev_dbg(adapter->dev, "event: Link Quality\n"); break; case EVENT_PRE_BEACON_LOST: dev_dbg(adapter->dev, "event: Pre-Beacon Lost\n"); break; case EVENT_IBSS_COALESCED: dev_dbg(adapter->dev, "event: IBSS_COALESCED\n"); ret = mwifiex_send_cmd_async(priv, HostCmd_CMD_802_11_IBSS_COALESCING_STATUS, HostCmd_ACT_GEN_GET, 0, NULL); break; case EVENT_ADDBA: dev_dbg(adapter->dev, "event: ADDBA Request\n"); mwifiex_send_cmd_async(priv, HostCmd_CMD_11N_ADDBA_RSP, HostCmd_ACT_GEN_SET, 0, adapter->event_body); break; case EVENT_DELBA: dev_dbg(adapter->dev, "event: DELBA Request\n"); mwifiex_11n_delete_ba_stream(priv, adapter->event_body); break; case EVENT_BA_STREAM_TIEMOUT: dev_dbg(adapter->dev, "event: BA Stream timeout\n"); mwifiex_11n_ba_stream_timeout(priv, (struct host_cmd_ds_11n_batimeout *) adapter->event_body); break; case EVENT_AMSDU_AGGR_CTRL: ctrl = le16_to_cpu(*(__le16 *)adapter->event_body); dev_dbg(adapter->dev, "event: AMSDU_AGGR_CTRL %d\n", ctrl); adapter->tx_buf_size = min_t(u16, adapter->curr_tx_buf_size, ctrl); dev_dbg(adapter->dev, "event: tx_buf_size %d\n", adapter->tx_buf_size); break; case EVENT_WEP_ICV_ERR: dev_dbg(adapter->dev, "event: WEP ICV error\n"); break; case EVENT_BW_CHANGE: dev_dbg(adapter->dev, "event: BW Change\n"); break; case EVENT_HOSTWAKE_STAIE: dev_dbg(adapter->dev, "event: HOSTWAKE_STAIE %d\n", eventcause); break; case EVENT_REMAIN_ON_CHAN_EXPIRED: dev_dbg(adapter->dev, "event: Remain on channel expired\n"); cfg80211_remain_on_channel_expired(priv->wdev, priv->roc_cfg.cookie, &priv->roc_cfg.chan, priv->roc_cfg.chan_type, GFP_ATOMIC); memset(&priv->roc_cfg, 0x00, sizeof(struct mwifiex_roc_cfg)); break; default: dev_dbg(adapter->dev, "event: unknown event id: %#x\n", eventcause); break; } return ret; }