/* * Marvell Wireless LAN device driver: CFG80211 * * 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 "cfg80211.h" #include "main.h" /* * This function maps the nl802.11 channel type into driver channel type. * * The mapping is as follows - * NL80211_CHAN_NO_HT -> NO_SEC_CHANNEL * NL80211_CHAN_HT20 -> NO_SEC_CHANNEL * NL80211_CHAN_HT40PLUS -> SEC_CHANNEL_ABOVE * NL80211_CHAN_HT40MINUS -> SEC_CHANNEL_BELOW * Others -> NO_SEC_CHANNEL */ static int mwifiex_cfg80211_channel_type_to_mwifiex_channels(enum nl80211_channel_type channel_type) { switch (channel_type) { case NL80211_CHAN_NO_HT: case NL80211_CHAN_HT20: return NO_SEC_CHANNEL; case NL80211_CHAN_HT40PLUS: return SEC_CHANNEL_ABOVE; case NL80211_CHAN_HT40MINUS: return SEC_CHANNEL_BELOW; default: return NO_SEC_CHANNEL; } } /* * This function maps the driver channel type into nl802.11 channel type. * * The mapping is as follows - * NO_SEC_CHANNEL -> NL80211_CHAN_HT20 * SEC_CHANNEL_ABOVE -> NL80211_CHAN_HT40PLUS * SEC_CHANNEL_BELOW -> NL80211_CHAN_HT40MINUS * Others -> NL80211_CHAN_HT20 */ static enum nl80211_channel_type mwifiex_channels_to_cfg80211_channel_type(int channel_type) { switch (channel_type) { case NO_SEC_CHANNEL: return NL80211_CHAN_HT20; case SEC_CHANNEL_ABOVE: return NL80211_CHAN_HT40PLUS; case SEC_CHANNEL_BELOW: return NL80211_CHAN_HT40MINUS; default: return NL80211_CHAN_HT20; } } /* * This function checks whether WEP is set. */ static int mwifiex_is_alg_wep(u32 cipher) { switch (cipher) { case WLAN_CIPHER_SUITE_WEP40: case WLAN_CIPHER_SUITE_WEP104: return 1; default: break; } return 0; } /* * This function retrieves the private structure from kernel wiphy structure. */ static void *mwifiex_cfg80211_get_priv(struct wiphy *wiphy) { return (void *) (*(unsigned long *) wiphy_priv(wiphy)); } /* * CFG802.11 operation handler to delete a network key. */ static int mwifiex_cfg80211_del_key(struct wiphy *wiphy, struct net_device *netdev, u8 key_index, bool pairwise, const u8 *mac_addr) { struct mwifiex_private *priv = mwifiex_cfg80211_get_priv(wiphy); if (mwifiex_set_encode(priv, NULL, 0, key_index, 1)) { wiphy_err(wiphy, "deleting the crypto keys\n"); return -EFAULT; } wiphy_dbg(wiphy, "info: crypto keys deleted\n"); return 0; } /* * CFG802.11 operation handler to set Tx power. */ static int mwifiex_cfg80211_set_tx_power(struct wiphy *wiphy, enum nl80211_tx_power_setting type, int dbm) { struct mwifiex_private *priv = mwifiex_cfg80211_get_priv(wiphy); struct mwifiex_power_cfg power_cfg; if (type == NL80211_TX_POWER_FIXED) { power_cfg.is_power_auto = 0; power_cfg.power_level = dbm; } else { power_cfg.is_power_auto = 1; } return mwifiex_set_tx_power(priv, &power_cfg); } /* * CFG802.11 operation handler to set Power Save option. * * The timeout value, if provided, is currently ignored. */ static int mwifiex_cfg80211_set_power_mgmt(struct wiphy *wiphy, struct net_device *dev, bool enabled, int timeout) { struct mwifiex_private *priv = mwifiex_cfg80211_get_priv(wiphy); u32 ps_mode; if (timeout) wiphy_dbg(wiphy, "info: ignoring the timeout value" " for IEEE power save\n"); ps_mode = enabled; return mwifiex_drv_set_power(priv, &ps_mode); } /* * CFG802.11 operation handler to set the default network key. */ static int mwifiex_cfg80211_set_default_key(struct wiphy *wiphy, struct net_device *netdev, u8 key_index, bool unicast, bool multicast) { struct mwifiex_private *priv = mwifiex_cfg80211_get_priv(wiphy); /* Return if WEP key not configured */ if (priv->sec_info.wep_status == MWIFIEX_802_11_WEP_DISABLED) return 0; if (mwifiex_set_encode(priv, NULL, 0, key_index, 0)) { wiphy_err(wiphy, "set default Tx key index\n"); return -EFAULT; } return 0; } /* * CFG802.11 operation handler to add a network key. */ static int mwifiex_cfg80211_add_key(struct wiphy *wiphy, struct net_device *netdev, u8 key_index, bool pairwise, const u8 *mac_addr, struct key_params *params) { struct mwifiex_private *priv = mwifiex_cfg80211_get_priv(wiphy); if (mwifiex_set_encode(priv, params->key, params->key_len, key_index, 0)) { wiphy_err(wiphy, "crypto keys added\n"); return -EFAULT; } return 0; } /* * This function sends domain information to the firmware. * * The following information are passed to the firmware - * - Country codes * - Sub bands (first channel, number of channels, maximum Tx power) */ static int mwifiex_send_domain_info_cmd_fw(struct wiphy *wiphy) { u8 no_of_triplet = 0; struct ieee80211_country_ie_triplet *t; u8 no_of_parsed_chan = 0; u8 first_chan = 0, next_chan = 0, max_pwr = 0; u8 i, flag = 0; enum ieee80211_band band; struct ieee80211_supported_band *sband; struct ieee80211_channel *ch; struct mwifiex_private *priv = mwifiex_cfg80211_get_priv(wiphy); struct mwifiex_adapter *adapter = priv->adapter; struct mwifiex_802_11d_domain_reg *domain_info = &adapter->domain_reg; /* Set country code */ domain_info->country_code[0] = priv->country_code[0]; domain_info->country_code[1] = priv->country_code[1]; domain_info->country_code[2] = ' '; band = mwifiex_band_to_radio_type(adapter->config_bands); if (!wiphy->bands[band]) { wiphy_err(wiphy, "11D: setting domain info in FW\n"); return -1; } sband = wiphy->bands[band]; for (i = 0; i < sband->n_channels ; i++) { ch = &sband->channels[i]; if (ch->flags & IEEE80211_CHAN_DISABLED) continue; if (!flag) { flag = 1; first_chan = (u32) ch->hw_value; next_chan = first_chan; max_pwr = ch->max_power; no_of_parsed_chan = 1; continue; } if (ch->hw_value == next_chan + 1 && ch->max_power == max_pwr) { next_chan++; no_of_parsed_chan++; } else { t = &domain_info->triplet[no_of_triplet]; t->chans.first_channel = first_chan; t->chans.num_channels = no_of_parsed_chan; t->chans.max_power = max_pwr; no_of_triplet++; first_chan = (u32) ch->hw_value; next_chan = first_chan; max_pwr = ch->max_power; no_of_parsed_chan = 1; } } if (flag) { t = &domain_info->triplet[no_of_triplet]; t->chans.first_channel = first_chan; t->chans.num_channels = no_of_parsed_chan; t->chans.max_power = max_pwr; no_of_triplet++; } domain_info->no_of_triplet = no_of_triplet; if (mwifiex_send_cmd_async(priv, HostCmd_CMD_802_11D_DOMAIN_INFO, HostCmd_ACT_GEN_SET, 0, NULL)) { wiphy_err(wiphy, "11D: setting domain info in FW\n"); return -1; } return 0; } /* * CFG802.11 regulatory domain callback function. * * This function is called when the regulatory domain is changed due to the * following reasons - * - Set by driver * - Set by system core * - Set by user * - Set bt Country IE */ static int mwifiex_reg_notifier(struct wiphy *wiphy, struct regulatory_request *request) { struct mwifiex_private *priv = mwifiex_cfg80211_get_priv(wiphy); wiphy_dbg(wiphy, "info: cfg80211 regulatory domain callback for domain" " %c%c\n", request->alpha2[0], request->alpha2[1]); memcpy(priv->country_code, request->alpha2, sizeof(request->alpha2)); switch (request->initiator) { case NL80211_REGDOM_SET_BY_DRIVER: case NL80211_REGDOM_SET_BY_CORE: case NL80211_REGDOM_SET_BY_USER: break; /* Todo: apply driver specific changes in channel flags based on the request initiator if necessary. */ case NL80211_REGDOM_SET_BY_COUNTRY_IE: break; } mwifiex_send_domain_info_cmd_fw(wiphy); return 0; } /* * This function sets the RF channel. * * This function creates multiple IOCTL requests, populates them accordingly * and issues them to set the band/channel and frequency. */ static int mwifiex_set_rf_channel(struct mwifiex_private *priv, struct ieee80211_channel *chan, enum nl80211_channel_type channel_type) { struct mwifiex_chan_freq_power cfp; struct mwifiex_ds_band_cfg band_cfg; u32 config_bands = 0; struct wiphy *wiphy = priv->wdev->wiphy; if (chan) { memset(&band_cfg, 0, sizeof(band_cfg)); /* Set appropriate bands */ if (chan->band == IEEE80211_BAND_2GHZ) config_bands = BAND_B | BAND_G | BAND_GN; else config_bands = BAND_AN | BAND_A; if (priv->bss_mode == NL80211_IFTYPE_STATION || priv->bss_mode == NL80211_IFTYPE_UNSPECIFIED) { band_cfg.config_bands = config_bands; } else if (priv->bss_mode == NL80211_IFTYPE_ADHOC) { band_cfg.config_bands = config_bands; band_cfg.adhoc_start_band = config_bands; } band_cfg.sec_chan_offset = mwifiex_cfg80211_channel_type_to_mwifiex_channels (channel_type); if (mwifiex_set_radio_band_cfg(priv, &band_cfg)) return -EFAULT; mwifiex_send_domain_info_cmd_fw(wiphy); } wiphy_dbg(wiphy, "info: setting band %d, channel offset %d and " "mode %d\n", config_bands, band_cfg.sec_chan_offset, priv->bss_mode); if (!chan) return 0; memset(&cfp, 0, sizeof(cfp)); cfp.freq = chan->center_freq; cfp.channel = ieee80211_frequency_to_channel(chan->center_freq); if (mwifiex_bss_set_channel(priv, &cfp)) return -EFAULT; return mwifiex_drv_change_adhoc_chan(priv, cfp.channel); } /* * CFG802.11 operation handler to set channel. * * This function can only be used when station is not connected. */ static int mwifiex_cfg80211_set_channel(struct wiphy *wiphy, struct net_device *dev, struct ieee80211_channel *chan, enum nl80211_channel_type channel_type) { struct mwifiex_private *priv = mwifiex_cfg80211_get_priv(wiphy); if (priv->media_connected) { wiphy_err(wiphy, "This setting is valid only when station " "is not connected\n"); return -EINVAL; } return mwifiex_set_rf_channel(priv, chan, channel_type); } /* * This function sets the fragmentation threshold. * * The fragmentation threshold value must lie between MWIFIEX_FRAG_MIN_VALUE * and MWIFIEX_FRAG_MAX_VALUE. */ static int mwifiex_set_frag(struct mwifiex_private *priv, u32 frag_thr) { int ret; if (frag_thr < MWIFIEX_FRAG_MIN_VALUE || frag_thr > MWIFIEX_FRAG_MAX_VALUE) return -EINVAL; /* Send request to firmware */ ret = mwifiex_send_cmd_sync(priv, HostCmd_CMD_802_11_SNMP_MIB, HostCmd_ACT_GEN_SET, FRAG_THRESH_I, &frag_thr); return ret; } /* * This function sets the RTS threshold. * The rts value must lie between MWIFIEX_RTS_MIN_VALUE * and MWIFIEX_RTS_MAX_VALUE. */ static int mwifiex_set_rts(struct mwifiex_private *priv, u32 rts_thr) { if (rts_thr < MWIFIEX_RTS_MIN_VALUE || rts_thr > MWIFIEX_RTS_MAX_VALUE) rts_thr = MWIFIEX_RTS_MAX_VALUE; return mwifiex_send_cmd_sync(priv, HostCmd_CMD_802_11_SNMP_MIB, HostCmd_ACT_GEN_SET, RTS_THRESH_I, &rts_thr); } /* * CFG802.11 operation handler to set wiphy parameters. * * This function can be used to set the RTS threshold and the * Fragmentation threshold of the driver. */ static int mwifiex_cfg80211_set_wiphy_params(struct wiphy *wiphy, u32 changed) { struct mwifiex_private *priv = mwifiex_cfg80211_get_priv(wiphy); int ret = 0; if (changed & WIPHY_PARAM_RTS_THRESHOLD) { ret = mwifiex_set_rts(priv, wiphy->rts_threshold); if (ret) return ret; } if (changed & WIPHY_PARAM_FRAG_THRESHOLD) ret = mwifiex_set_frag(priv, wiphy->frag_threshold); return ret; } /* * CFG802.11 operation handler to change interface type. */ static int mwifiex_cfg80211_change_virtual_intf(struct wiphy *wiphy, struct net_device *dev, enum nl80211_iftype type, u32 *flags, struct vif_params *params) { int ret; struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); if (priv->bss_mode == type) { wiphy_warn(wiphy, "already set to required type\n"); return 0; } priv->bss_mode = type; switch (type) { case NL80211_IFTYPE_ADHOC: dev->ieee80211_ptr->iftype = NL80211_IFTYPE_ADHOC; wiphy_dbg(wiphy, "info: setting interface type to adhoc\n"); break; case NL80211_IFTYPE_STATION: dev->ieee80211_ptr->iftype = NL80211_IFTYPE_STATION; wiphy_dbg(wiphy, "info: setting interface type to managed\n"); break; case NL80211_IFTYPE_UNSPECIFIED: dev->ieee80211_ptr->iftype = NL80211_IFTYPE_STATION; wiphy_dbg(wiphy, "info: setting interface type to auto\n"); return 0; default: wiphy_err(wiphy, "unknown interface type: %d\n", type); return -EINVAL; } mwifiex_deauthenticate(priv, NULL); priv->sec_info.authentication_mode = NL80211_AUTHTYPE_OPEN_SYSTEM; ret = mwifiex_send_cmd_sync(priv, HostCmd_CMD_SET_BSS_MODE, HostCmd_ACT_GEN_SET, 0, NULL); return ret; } /* * This function dumps the station information on a buffer. * * The following information are shown - * - Total bytes transmitted * - Total bytes received * - Total packets transmitted * - Total packets received * - Signal quality level * - Transmission rate */ static int mwifiex_dump_station_info(struct mwifiex_private *priv, struct station_info *sinfo) { struct mwifiex_ds_get_signal signal; struct mwifiex_rate_cfg rate; int ret = 0; sinfo->filled = STATION_INFO_RX_BYTES | STATION_INFO_TX_BYTES | STATION_INFO_RX_PACKETS | STATION_INFO_TX_PACKETS | STATION_INFO_SIGNAL | STATION_INFO_TX_BITRATE; /* Get signal information from the firmware */ memset(&signal, 0, sizeof(struct mwifiex_ds_get_signal)); if (mwifiex_get_signal_info(priv, &signal)) { dev_err(priv->adapter->dev, "getting signal information\n"); ret = -EFAULT; } if (mwifiex_drv_get_data_rate(priv, &rate)) { dev_err(priv->adapter->dev, "getting data rate\n"); ret = -EFAULT; } sinfo->rx_bytes = priv->stats.rx_bytes; sinfo->tx_bytes = priv->stats.tx_bytes; sinfo->rx_packets = priv->stats.rx_packets; sinfo->tx_packets = priv->stats.tx_packets; sinfo->signal = priv->w_stats.qual.level; sinfo->txrate.legacy = rate.rate; return ret; } /* * CFG802.11 operation handler to get station information. * * This function only works in connected mode, and dumps the * requested station information, if available. */ static int mwifiex_cfg80211_get_station(struct wiphy *wiphy, struct net_device *dev, u8 *mac, struct station_info *sinfo) { struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); mwifiex_dump_station_info(priv, sinfo); if (!priv->media_connected) return -ENOENT; if (memcmp(mac, priv->cfg_bssid, ETH_ALEN)) return -ENOENT; return mwifiex_dump_station_info(priv, sinfo); } /* Supported rates to be advertised to the cfg80211 */ static struct ieee80211_rate mwifiex_rates[] = { {.bitrate = 10, .hw_value = 2, }, {.bitrate = 20, .hw_value = 4, }, {.bitrate = 55, .hw_value = 11, }, {.bitrate = 110, .hw_value = 22, }, {.bitrate = 220, .hw_value = 44, }, {.bitrate = 60, .hw_value = 12, }, {.bitrate = 90, .hw_value = 18, }, {.bitrate = 120, .hw_value = 24, }, {.bitrate = 180, .hw_value = 36, }, {.bitrate = 240, .hw_value = 48, }, {.bitrate = 360, .hw_value = 72, }, {.bitrate = 480, .hw_value = 96, }, {.bitrate = 540, .hw_value = 108, }, {.bitrate = 720, .hw_value = 144, }, }; /* Channel definitions to be advertised to cfg80211 */ static struct ieee80211_channel mwifiex_channels_2ghz[] = { {.center_freq = 2412, .hw_value = 1, }, {.center_freq = 2417, .hw_value = 2, }, {.center_freq = 2422, .hw_value = 3, }, {.center_freq = 2427, .hw_value = 4, }, {.center_freq = 2432, .hw_value = 5, }, {.center_freq = 2437, .hw_value = 6, }, {.center_freq = 2442, .hw_value = 7, }, {.center_freq = 2447, .hw_value = 8, }, {.center_freq = 2452, .hw_value = 9, }, {.center_freq = 2457, .hw_value = 10, }, {.center_freq = 2462, .hw_value = 11, }, {.center_freq = 2467, .hw_value = 12, }, {.center_freq = 2472, .hw_value = 13, }, {.center_freq = 2484, .hw_value = 14, }, }; static struct ieee80211_supported_band mwifiex_band_2ghz = { .channels = mwifiex_channels_2ghz, .n_channels = ARRAY_SIZE(mwifiex_channels_2ghz), .bitrates = mwifiex_rates, .n_bitrates = 14, }; static struct ieee80211_channel mwifiex_channels_5ghz[] = { {.center_freq = 5040, .hw_value = 8, }, {.center_freq = 5060, .hw_value = 12, }, {.center_freq = 5080, .hw_value = 16, }, {.center_freq = 5170, .hw_value = 34, }, {.center_freq = 5190, .hw_value = 38, }, {.center_freq = 5210, .hw_value = 42, }, {.center_freq = 5230, .hw_value = 46, }, {.center_freq = 5180, .hw_value = 36, }, {.center_freq = 5200, .hw_value = 40, }, {.center_freq = 5220, .hw_value = 44, }, {.center_freq = 5240, .hw_value = 48, }, {.center_freq = 5260, .hw_value = 52, }, {.center_freq = 5280, .hw_value = 56, }, {.center_freq = 5300, .hw_value = 60, }, {.center_freq = 5320, .hw_value = 64, }, {.center_freq = 5500, .hw_value = 100, }, {.center_freq = 5520, .hw_value = 104, }, {.center_freq = 5540, .hw_value = 108, }, {.center_freq = 5560, .hw_value = 112, }, {.center_freq = 5580, .hw_value = 116, }, {.center_freq = 5600, .hw_value = 120, }, {.center_freq = 5620, .hw_value = 124, }, {.center_freq = 5640, .hw_value = 128, }, {.center_freq = 5660, .hw_value = 132, }, {.center_freq = 5680, .hw_value = 136, }, {.center_freq = 5700, .hw_value = 140, }, {.center_freq = 5745, .hw_value = 149, }, {.center_freq = 5765, .hw_value = 153, }, {.center_freq = 5785, .hw_value = 157, }, {.center_freq = 5805, .hw_value = 161, }, {.center_freq = 5825, .hw_value = 165, }, }; static struct ieee80211_supported_band mwifiex_band_5ghz = { .channels = mwifiex_channels_5ghz, .n_channels = ARRAY_SIZE(mwifiex_channels_5ghz), .bitrates = mwifiex_rates - 4, .n_bitrates = ARRAY_SIZE(mwifiex_rates) + 4, }; /* Supported crypto cipher suits to be advertised to cfg80211 */ static const u32 mwifiex_cipher_suites[] = { WLAN_CIPHER_SUITE_WEP40, WLAN_CIPHER_SUITE_WEP104, WLAN_CIPHER_SUITE_TKIP, WLAN_CIPHER_SUITE_CCMP, }; /* * CFG802.11 operation handler for setting bit rates. * * Function selects legacy bang B/G/BG from corresponding bitrates selection. * Currently only 2.4GHz band is supported. */ static int mwifiex_cfg80211_set_bitrate_mask(struct wiphy *wiphy, struct net_device *dev, const u8 *peer, const struct cfg80211_bitrate_mask *mask) { struct mwifiex_ds_band_cfg band_cfg; struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); int index = 0, mode = 0, i; /* Currently only 2.4GHz is supported */ for (i = 0; i < mwifiex_band_2ghz.n_bitrates; i++) { /* * Rates below 6 Mbps in the table are CCK rates; 802.11b * and from 6 they are OFDM; 802.11G */ if (mwifiex_rates[i].bitrate == 60) { index = 1 << i; break; } } if (mask->control[IEEE80211_BAND_2GHZ].legacy < index) { mode = BAND_B; } else { mode = BAND_G; if (mask->control[IEEE80211_BAND_2GHZ].legacy % index) mode |= BAND_B; } memset(&band_cfg, 0, sizeof(band_cfg)); band_cfg.config_bands = mode; if (priv->bss_mode == NL80211_IFTYPE_ADHOC) band_cfg.adhoc_start_band = mode; band_cfg.sec_chan_offset = NO_SEC_CHANNEL; if (mwifiex_set_radio_band_cfg(priv, &band_cfg)) return -EFAULT; wiphy_debug(wiphy, "info: device configured in 802.11%s%s mode\n", (mode & BAND_B) ? "b" : "", (mode & BAND_G) ? "g" : ""); return 0; } /* * CFG802.11 operation handler for disconnection request. * * This function does not work when there is already a disconnection * procedure going on. */ static int mwifiex_cfg80211_disconnect(struct wiphy *wiphy, struct net_device *dev, u16 reason_code) { struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); if (priv->disconnect) return -EBUSY; priv->disconnect = 1; if (mwifiex_deauthenticate(priv, NULL)) return -EFAULT; wiphy_dbg(wiphy, "info: successfully disconnected from %pM:" " reason code %d\n", priv->cfg_bssid, reason_code); queue_work(priv->workqueue, &priv->cfg_workqueue); return 0; } /* * This function informs the CFG802.11 subsystem of a new IBSS. * * The following information are sent to the CFG802.11 subsystem * to register the new IBSS. If we do not register the new IBSS, * a kernel panic will result. * - SSID * - SSID length * - BSSID * - Channel */ static int mwifiex_cfg80211_inform_ibss_bss(struct mwifiex_private *priv) { struct ieee80211_channel *chan; struct mwifiex_bss_info bss_info; int ie_len; u8 ie_buf[IEEE80211_MAX_SSID_LEN + sizeof(struct ieee_types_header)]; if (mwifiex_get_bss_info(priv, &bss_info)) return -1; ie_buf[0] = WLAN_EID_SSID; ie_buf[1] = bss_info.ssid.ssid_len; memcpy(&ie_buf[sizeof(struct ieee_types_header)], &bss_info.ssid.ssid, bss_info.ssid.ssid_len); ie_len = ie_buf[1] + sizeof(struct ieee_types_header); chan = __ieee80211_get_channel(priv->wdev->wiphy, ieee80211_channel_to_frequency(bss_info.bss_chan, priv->curr_bss_params.band)); cfg80211_inform_bss(priv->wdev->wiphy, chan, bss_info.bssid, 0, WLAN_CAPABILITY_IBSS, 0, ie_buf, ie_len, 0, GFP_KERNEL); memcpy(priv->cfg_bssid, bss_info.bssid, ETH_ALEN); return 0; } /* * This function informs the CFG802.11 subsystem of a new BSS connection. * * The following information are sent to the CFG802.11 subsystem * to register the new BSS connection. If we do not register the new BSS, * a kernel panic will result. * - MAC address * - Capabilities * - Beacon period * - RSSI value * - Channel * - Supported rates IE * - Extended capabilities IE * - DS parameter set IE * - HT Capability IE * - Vendor Specific IE (221) * - WPA IE * - RSN IE */ static int mwifiex_inform_bss_from_scan_result(struct mwifiex_private *priv, struct mwifiex_802_11_ssid *ssid) { struct mwifiex_bssdescriptor *scan_table; int i, j; struct ieee80211_channel *chan; u8 *ie, *ie_buf; u32 ie_len; u8 *beacon; int beacon_size; u8 element_id, element_len; #define MAX_IE_BUF 2048 ie_buf = kzalloc(MAX_IE_BUF, GFP_KERNEL); if (!ie_buf) { dev_err(priv->adapter->dev, "%s: failed to alloc ie_buf\n", __func__); return -ENOMEM; } scan_table = priv->adapter->scan_table; for (i = 0; i < priv->adapter->num_in_scan_table; i++) { if (ssid) { /* Inform specific BSS only */ if (memcmp(ssid->ssid, scan_table[i].ssid.ssid, ssid->ssid_len)) continue; } memset(ie_buf, 0, MAX_IE_BUF); ie_buf[0] = WLAN_EID_SSID; ie_buf[1] = scan_table[i].ssid.ssid_len; memcpy(&ie_buf[sizeof(struct ieee_types_header)], scan_table[i].ssid.ssid, ie_buf[1]); ie = ie_buf + ie_buf[1] + sizeof(struct ieee_types_header); ie_len = ie_buf[1] + sizeof(struct ieee_types_header); ie[0] = WLAN_EID_SUPP_RATES; for (j = 0; j < sizeof(scan_table[i].supported_rates); j++) { if (!scan_table[i].supported_rates[j]) break; else ie[j + sizeof(struct ieee_types_header)] = scan_table[i].supported_rates[j]; } ie[1] = j; ie_len += ie[1] + sizeof(struct ieee_types_header); beacon = scan_table[i].beacon_buf; beacon_size = scan_table[i].beacon_buf_size; /* Skip time stamp, beacon interval and capability */ if (beacon) { beacon += sizeof(scan_table[i].beacon_period) + sizeof(scan_table[i].time_stamp) + +sizeof(scan_table[i].cap_info_bitmap); beacon_size -= sizeof(scan_table[i].beacon_period) + sizeof(scan_table[i].time_stamp) + sizeof(scan_table[i].cap_info_bitmap); } while (beacon_size >= sizeof(struct ieee_types_header)) { ie = ie_buf + ie_len; element_id = *beacon; element_len = *(beacon + 1); if (beacon_size < (int) element_len + sizeof(struct ieee_types_header)) { dev_err(priv->adapter->dev, "%s: in processing" " IE, bytes left < IE length\n", __func__); break; } switch (element_id) { case WLAN_EID_EXT_CAPABILITY: case WLAN_EID_DS_PARAMS: case WLAN_EID_HT_CAPABILITY: case WLAN_EID_VENDOR_SPECIFIC: case WLAN_EID_RSN: case WLAN_EID_BSS_AC_ACCESS_DELAY: ie[0] = element_id; ie[1] = element_len; memcpy(&ie[sizeof(struct ieee_types_header)], (u8 *) beacon + sizeof(struct ieee_types_header), element_len); ie_len += ie[1] + sizeof(struct ieee_types_header); break; default: break; } beacon += element_len + sizeof(struct ieee_types_header); beacon_size -= element_len + sizeof(struct ieee_types_header); } chan = ieee80211_get_channel(priv->wdev->wiphy, scan_table[i].freq); cfg80211_inform_bss(priv->wdev->wiphy, chan, scan_table[i].mac_address, 0, scan_table[i].cap_info_bitmap, scan_table[i].beacon_period, ie_buf, ie_len, scan_table[i].rssi, GFP_KERNEL); } kfree(ie_buf); return 0; } /* * This function connects with a BSS. * * This function handles both Infra and Ad-Hoc modes. It also performs * validity checking on the provided parameters, disconnects from the * current BSS (if any), sets up the association/scan parameters, * including security settings, and performs specific SSID scan before * trying to connect. * * For Infra mode, the function returns failure if the specified SSID * is not found in scan table. However, for Ad-Hoc mode, it can create * the IBSS if it does not exist. On successful completion in either case, * the function notifies the CFG802.11 subsystem of the new BSS connection, * otherwise the kernel will panic. */ static int mwifiex_cfg80211_assoc(struct mwifiex_private *priv, size_t ssid_len, u8 *ssid, u8 *bssid, int mode, struct ieee80211_channel *channel, struct cfg80211_connect_params *sme, bool privacy) { struct mwifiex_802_11_ssid req_ssid; struct mwifiex_ssid_bssid ssid_bssid; int ret, auth_type = 0; memset(&req_ssid, 0, sizeof(struct mwifiex_802_11_ssid)); memset(&ssid_bssid, 0, sizeof(struct mwifiex_ssid_bssid)); req_ssid.ssid_len = ssid_len; if (ssid_len > IEEE80211_MAX_SSID_LEN) { dev_err(priv->adapter->dev, "invalid SSID - aborting\n"); return -EINVAL; } memcpy(req_ssid.ssid, ssid, ssid_len); if (!req_ssid.ssid_len || req_ssid.ssid[0] < 0x20) { dev_err(priv->adapter->dev, "invalid SSID - aborting\n"); return -EINVAL; } /* disconnect before try to associate */ mwifiex_deauthenticate(priv, NULL); if (channel) ret = mwifiex_set_rf_channel(priv, channel, mwifiex_channels_to_cfg80211_channel_type (priv->adapter->chan_offset)); ret = mwifiex_set_encode(priv, NULL, 0, 0, 1); /* Disable keys */ if (mode == NL80211_IFTYPE_ADHOC) { /* "privacy" is set only for ad-hoc mode */ if (privacy) { /* * Keep WLAN_CIPHER_SUITE_WEP104 for now so that * the firmware can find a matching network from the * scan. The cfg80211 does not give us the encryption * mode at this stage so just setting it to WEP here. */ priv->sec_info.encryption_mode = WLAN_CIPHER_SUITE_WEP104; priv->sec_info.authentication_mode = NL80211_AUTHTYPE_OPEN_SYSTEM; } goto done; } /* Now handle infra mode. "sme" is valid for infra mode only */ if (sme->auth_type == NL80211_AUTHTYPE_AUTOMATIC || sme->auth_type == NL80211_AUTHTYPE_OPEN_SYSTEM) auth_type = NL80211_AUTHTYPE_OPEN_SYSTEM; else if (sme->auth_type == NL80211_AUTHTYPE_SHARED_KEY) auth_type = NL80211_AUTHTYPE_SHARED_KEY; if (sme->crypto.n_ciphers_pairwise) { priv->sec_info.encryption_mode = sme->crypto.ciphers_pairwise[0]; priv->sec_info.authentication_mode = auth_type; } if (sme->crypto.cipher_group) { priv->sec_info.encryption_mode = sme->crypto.cipher_group; priv->sec_info.authentication_mode = auth_type; } if (sme->ie) ret = mwifiex_set_gen_ie(priv, sme->ie, sme->ie_len); if (sme->key) { if (mwifiex_is_alg_wep(priv->sec_info.encryption_mode)) { dev_dbg(priv->adapter->dev, "info: setting wep encryption" " with key len %d\n", sme->key_len); ret = mwifiex_set_encode(priv, sme->key, sme->key_len, sme->key_idx, 0); } } done: /* Do specific SSID scanning */ if (mwifiex_request_scan(priv, &req_ssid)) { dev_err(priv->adapter->dev, "scan error\n"); return -EFAULT; } memcpy(&ssid_bssid.ssid, &req_ssid, sizeof(struct mwifiex_802_11_ssid)); if (mode != NL80211_IFTYPE_ADHOC) { if (mwifiex_find_best_bss(priv, &ssid_bssid)) return -EFAULT; /* Inform the BSS information to kernel, otherwise * kernel will give a panic after successful assoc */ if (mwifiex_inform_bss_from_scan_result(priv, &req_ssid)) return -EFAULT; } dev_dbg(priv->adapter->dev, "info: trying to associate to %s and bssid %pM\n", (char *) req_ssid.ssid, ssid_bssid.bssid); memcpy(&priv->cfg_bssid, ssid_bssid.bssid, 6); /* Connect to BSS by ESSID */ memset(&ssid_bssid.bssid, 0, ETH_ALEN); if (!netif_queue_stopped(priv->netdev)) netif_stop_queue(priv->netdev); if (mwifiex_bss_start(priv, &ssid_bssid)) return -EFAULT; if (mode == NL80211_IFTYPE_ADHOC) { /* Inform the BSS information to kernel, otherwise * kernel will give a panic after successful assoc */ if (mwifiex_cfg80211_inform_ibss_bss(priv)) return -EFAULT; } return ret; } /* * CFG802.11 operation handler for association request. * * This function does not work when the current mode is set to Ad-Hoc, or * when there is already an association procedure going on. The given BSS * information is used to associate. */ static int mwifiex_cfg80211_connect(struct wiphy *wiphy, struct net_device *dev, struct cfg80211_connect_params *sme) { struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); int ret = 0; if (priv->assoc_request) return -EBUSY; if (priv->bss_mode == NL80211_IFTYPE_ADHOC) { wiphy_err(wiphy, "received infra assoc request " "when station is in ibss mode\n"); goto done; } priv->assoc_request = -EINPROGRESS; wiphy_dbg(wiphy, "info: Trying to associate to %s and bssid %pM\n", (char *) sme->ssid, sme->bssid); ret = mwifiex_cfg80211_assoc(priv, sme->ssid_len, sme->ssid, sme->bssid, priv->bss_mode, sme->channel, sme, 0); priv->assoc_request = 1; done: priv->assoc_result = ret; queue_work(priv->workqueue, &priv->cfg_workqueue); return ret; } /* * CFG802.11 operation handler to join an IBSS. * * This function does not work in any mode other than Ad-Hoc, or if * a join operation is already in progress. */ static int mwifiex_cfg80211_join_ibss(struct wiphy *wiphy, struct net_device *dev, struct cfg80211_ibss_params *params) { struct mwifiex_private *priv = mwifiex_cfg80211_get_priv(wiphy); int ret = 0; if (priv->ibss_join_request) return -EBUSY; if (priv->bss_mode != NL80211_IFTYPE_ADHOC) { wiphy_err(wiphy, "request to join ibss received " "when station is not in ibss mode\n"); goto done; } priv->ibss_join_request = -EINPROGRESS; wiphy_dbg(wiphy, "info: trying to join to %s and bssid %pM\n", (char *) params->ssid, params->bssid); ret = mwifiex_cfg80211_assoc(priv, params->ssid_len, params->ssid, params->bssid, priv->bss_mode, params->channel, NULL, params->privacy); priv->ibss_join_request = 1; done: priv->ibss_join_result = ret; queue_work(priv->workqueue, &priv->cfg_workqueue); return ret; } /* * CFG802.11 operation handler to leave an IBSS. * * This function does not work if a leave operation is * already in progress. */ static int mwifiex_cfg80211_leave_ibss(struct wiphy *wiphy, struct net_device *dev) { struct mwifiex_private *priv = mwifiex_cfg80211_get_priv(wiphy); if (priv->disconnect) return -EBUSY; priv->disconnect = 1; wiphy_dbg(wiphy, "info: disconnecting from essid %pM\n", priv->cfg_bssid); if (mwifiex_deauthenticate(priv, NULL)) return -EFAULT; queue_work(priv->workqueue, &priv->cfg_workqueue); return 0; } /* * CFG802.11 operation handler for scan request. * * This function issues a scan request to the firmware based upon * the user specified scan configuration. On successfull completion, * it also informs the results. */ static int mwifiex_cfg80211_scan(struct wiphy *wiphy, struct net_device *dev, struct cfg80211_scan_request *request) { struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); wiphy_dbg(wiphy, "info: received scan request on %s\n", dev->name); if (priv->scan_request && priv->scan_request != request) return -EBUSY; priv->scan_request = request; queue_work(priv->workqueue, &priv->cfg_workqueue); return 0; } /* * This function sets up the CFG802.11 specific HT capability fields * with default values. * * The following default values are set - * - HT Supported = True * - Maximum AMPDU length factor = IEEE80211_HT_MAX_AMPDU_64K * - Minimum AMPDU spacing = IEEE80211_HT_MPDU_DENSITY_NONE * - HT Capabilities supported by firmware * - MCS information, Rx mask = 0xff * - MCD information, Tx parameters = IEEE80211_HT_MCS_TX_DEFINED (0x01) */ static void mwifiex_setup_ht_caps(struct ieee80211_sta_ht_cap *ht_info, struct mwifiex_private *priv) { int rx_mcs_supp; struct ieee80211_mcs_info mcs_set; u8 *mcs = (u8 *)&mcs_set; struct mwifiex_adapter *adapter = priv->adapter; ht_info->ht_supported = true; ht_info->ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K; ht_info->ampdu_density = IEEE80211_HT_MPDU_DENSITY_NONE; memset(&ht_info->mcs, 0, sizeof(ht_info->mcs)); /* Fill HT capability information */ if (ISSUPP_CHANWIDTH40(adapter->hw_dot_11n_dev_cap)) ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40; else ht_info->cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; if (ISSUPP_SHORTGI20(adapter->hw_dot_11n_dev_cap)) ht_info->cap |= IEEE80211_HT_CAP_SGI_20; else ht_info->cap &= ~IEEE80211_HT_CAP_SGI_20; if (ISSUPP_SHORTGI40(adapter->hw_dot_11n_dev_cap)) ht_info->cap |= IEEE80211_HT_CAP_SGI_40; else ht_info->cap &= ~IEEE80211_HT_CAP_SGI_40; if (ISSUPP_RXSTBC(adapter->hw_dot_11n_dev_cap)) ht_info->cap |= 1 << IEEE80211_HT_CAP_RX_STBC_SHIFT; else ht_info->cap &= ~(3 << IEEE80211_HT_CAP_RX_STBC_SHIFT); if (ISSUPP_TXSTBC(adapter->hw_dot_11n_dev_cap)) ht_info->cap |= IEEE80211_HT_CAP_TX_STBC; else ht_info->cap &= ~IEEE80211_HT_CAP_TX_STBC; ht_info->cap &= ~IEEE80211_HT_CAP_MAX_AMSDU; ht_info->cap |= IEEE80211_HT_CAP_SM_PS; rx_mcs_supp = GET_RXMCSSUPP(adapter->hw_dev_mcs_support); /* Set MCS for 1x1 */ memset(mcs, 0xff, rx_mcs_supp); /* Clear all the other values */ memset(&mcs[rx_mcs_supp], 0, sizeof(struct ieee80211_mcs_info) - rx_mcs_supp); if (priv->bss_mode == NL80211_IFTYPE_STATION || ISSUPP_CHANWIDTH40(adapter->hw_dot_11n_dev_cap)) /* Set MCS32 for infra mode or ad-hoc mode with 40MHz support */ SETHT_MCS32(mcs_set.rx_mask); memcpy((u8 *) &ht_info->mcs, mcs, sizeof(struct ieee80211_mcs_info)); ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED; } /* station cfg80211 operations */ static struct cfg80211_ops mwifiex_cfg80211_ops = { .change_virtual_intf = mwifiex_cfg80211_change_virtual_intf, .scan = mwifiex_cfg80211_scan, .connect = mwifiex_cfg80211_connect, .disconnect = mwifiex_cfg80211_disconnect, .get_station = mwifiex_cfg80211_get_station, .set_wiphy_params = mwifiex_cfg80211_set_wiphy_params, .set_channel = mwifiex_cfg80211_set_channel, .join_ibss = mwifiex_cfg80211_join_ibss, .leave_ibss = mwifiex_cfg80211_leave_ibss, .add_key = mwifiex_cfg80211_add_key, .del_key = mwifiex_cfg80211_del_key, .set_default_key = mwifiex_cfg80211_set_default_key, .set_power_mgmt = mwifiex_cfg80211_set_power_mgmt, .set_tx_power = mwifiex_cfg80211_set_tx_power, .set_bitrate_mask = mwifiex_cfg80211_set_bitrate_mask, }; /* * This function registers the device with CFG802.11 subsystem. * * The function creates the wireless device/wiphy, populates it with * default parameters and handler function pointers, and finally * registers the device. */ int mwifiex_register_cfg80211(struct net_device *dev, u8 *mac, struct mwifiex_private *priv) { int ret; void *wdev_priv; struct wireless_dev *wdev; wdev = kzalloc(sizeof(struct wireless_dev), GFP_KERNEL); if (!wdev) { dev_err(priv->adapter->dev, "%s: allocating wireless device\n", __func__); return -ENOMEM; } wdev->wiphy = wiphy_new(&mwifiex_cfg80211_ops, sizeof(struct mwifiex_private *)); if (!wdev->wiphy) { kfree(wdev); return -ENOMEM; } wdev->iftype = NL80211_IFTYPE_STATION; wdev->wiphy->max_scan_ssids = 10; wdev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_ADHOC); wdev->wiphy->bands[IEEE80211_BAND_2GHZ] = &mwifiex_band_2ghz; mwifiex_setup_ht_caps( &wdev->wiphy->bands[IEEE80211_BAND_2GHZ]->ht_cap, priv); if (priv->adapter->config_bands & BAND_A) { wdev->wiphy->bands[IEEE80211_BAND_5GHZ] = &mwifiex_band_5ghz; mwifiex_setup_ht_caps( &wdev->wiphy->bands[IEEE80211_BAND_5GHZ]->ht_cap, priv); } else { wdev->wiphy->bands[IEEE80211_BAND_5GHZ] = NULL; } /* Initialize cipher suits */ wdev->wiphy->cipher_suites = mwifiex_cipher_suites; wdev->wiphy->n_cipher_suites = ARRAY_SIZE(mwifiex_cipher_suites); memcpy(wdev->wiphy->perm_addr, mac, 6); wdev->wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; /* We are using custom domains */ wdev->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY; wdev->wiphy->reg_notifier = mwifiex_reg_notifier; /* Set struct mwifiex_private pointer in wiphy_priv */ wdev_priv = wiphy_priv(wdev->wiphy); *(unsigned long *) wdev_priv = (unsigned long) priv; set_wiphy_dev(wdev->wiphy, (struct device *) priv->adapter->dev); ret = wiphy_register(wdev->wiphy); if (ret < 0) { dev_err(priv->adapter->dev, "%s: registering cfg80211 device\n", __func__); wiphy_free(wdev->wiphy); kfree(wdev); return ret; } else { dev_dbg(priv->adapter->dev, "info: successfully registered wiphy device\n"); } dev_net_set(dev, wiphy_net(wdev->wiphy)); dev->ieee80211_ptr = wdev; memcpy(dev->dev_addr, wdev->wiphy->perm_addr, 6); memcpy(dev->perm_addr, wdev->wiphy->perm_addr, 6); SET_NETDEV_DEV(dev, wiphy_dev(wdev->wiphy)); priv->wdev = wdev; dev->flags |= IFF_BROADCAST | IFF_MULTICAST; dev->watchdog_timeo = MWIFIEX_DEFAULT_WATCHDOG_TIMEOUT; dev->hard_header_len += MWIFIEX_MIN_DATA_HEADER_LEN; return ret; } /* * This function handles the result of different pending network operations. * * The following operations are handled and CFG802.11 subsystem is * notified accordingly - * - Scan request completion * - Association request completion * - IBSS join request completion * - Disconnect request completion */ void mwifiex_cfg80211_results(struct work_struct *work) { struct mwifiex_private *priv = container_of(work, struct mwifiex_private, cfg_workqueue); struct mwifiex_user_scan_cfg *scan_req; int ret = 0, i; struct ieee80211_channel *chan; if (priv->scan_request) { scan_req = kzalloc(sizeof(struct mwifiex_user_scan_cfg), GFP_KERNEL); if (!scan_req) { dev_err(priv->adapter->dev, "failed to alloc " "scan_req\n"); return; } for (i = 0; i < priv->scan_request->n_ssids; i++) { memcpy(scan_req->ssid_list[i].ssid, priv->scan_request->ssids[i].ssid, priv->scan_request->ssids[i].ssid_len); scan_req->ssid_list[i].max_len = priv->scan_request->ssids[i].ssid_len; } for (i = 0; i < priv->scan_request->n_channels; i++) { chan = priv->scan_request->channels[i]; scan_req->chan_list[i].chan_number = chan->hw_value; scan_req->chan_list[i].radio_type = chan->band; if (chan->flags & IEEE80211_CHAN_DISABLED) scan_req->chan_list[i].scan_type = MWIFIEX_SCAN_TYPE_PASSIVE; else scan_req->chan_list[i].scan_type = MWIFIEX_SCAN_TYPE_ACTIVE; scan_req->chan_list[i].scan_time = 0; } if (mwifiex_set_user_scan_ioctl(priv, scan_req)) { ret = -EFAULT; goto done; } if (mwifiex_inform_bss_from_scan_result(priv, NULL)) ret = -EFAULT; done: priv->scan_result_status = ret; dev_dbg(priv->adapter->dev, "info: %s: sending scan results\n", __func__); cfg80211_scan_done(priv->scan_request, (priv->scan_result_status < 0)); priv->scan_request = NULL; kfree(scan_req); } if (priv->assoc_request == 1) { if (!priv->assoc_result) { cfg80211_connect_result(priv->netdev, priv->cfg_bssid, NULL, 0, NULL, 0, WLAN_STATUS_SUCCESS, GFP_KERNEL); dev_dbg(priv->adapter->dev, "info: associated to bssid %pM successfully\n", priv->cfg_bssid); } else { dev_dbg(priv->adapter->dev, "info: association to bssid %pM failed\n", priv->cfg_bssid); memset(priv->cfg_bssid, 0, ETH_ALEN); } priv->assoc_request = 0; priv->assoc_result = 0; } if (priv->ibss_join_request == 1) { if (!priv->ibss_join_result) { cfg80211_ibss_joined(priv->netdev, priv->cfg_bssid, GFP_KERNEL); dev_dbg(priv->adapter->dev, "info: joined/created adhoc network with bssid" " %pM successfully\n", priv->cfg_bssid); } else { dev_dbg(priv->adapter->dev, "info: failed creating/joining adhoc network\n"); } priv->ibss_join_request = 0; priv->ibss_join_result = 0; } if (priv->disconnect) { memset(priv->cfg_bssid, 0, ETH_ALEN); priv->disconnect = 0; } }