/** * Copyright (c) 2014 Redpine Signals Inc. * * Permission to use, copy, modify, and/or distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include #include "rsi_debugfs.h" #include "rsi_mgmt.h" #include "rsi_common.h" static const struct ieee80211_channel rsi_2ghz_channels[] = { { .band = IEEE80211_BAND_2GHZ, .center_freq = 2412, .hw_value = 1 }, /* Channel 1 */ { .band = IEEE80211_BAND_2GHZ, .center_freq = 2417, .hw_value = 2 }, /* Channel 2 */ { .band = IEEE80211_BAND_2GHZ, .center_freq = 2422, .hw_value = 3 }, /* Channel 3 */ { .band = IEEE80211_BAND_2GHZ, .center_freq = 2427, .hw_value = 4 }, /* Channel 4 */ { .band = IEEE80211_BAND_2GHZ, .center_freq = 2432, .hw_value = 5 }, /* Channel 5 */ { .band = IEEE80211_BAND_2GHZ, .center_freq = 2437, .hw_value = 6 }, /* Channel 6 */ { .band = IEEE80211_BAND_2GHZ, .center_freq = 2442, .hw_value = 7 }, /* Channel 7 */ { .band = IEEE80211_BAND_2GHZ, .center_freq = 2447, .hw_value = 8 }, /* Channel 8 */ { .band = IEEE80211_BAND_2GHZ, .center_freq = 2452, .hw_value = 9 }, /* Channel 9 */ { .band = IEEE80211_BAND_2GHZ, .center_freq = 2457, .hw_value = 10 }, /* Channel 10 */ { .band = IEEE80211_BAND_2GHZ, .center_freq = 2462, .hw_value = 11 }, /* Channel 11 */ { .band = IEEE80211_BAND_2GHZ, .center_freq = 2467, .hw_value = 12 }, /* Channel 12 */ { .band = IEEE80211_BAND_2GHZ, .center_freq = 2472, .hw_value = 13 }, /* Channel 13 */ { .band = IEEE80211_BAND_2GHZ, .center_freq = 2484, .hw_value = 14 }, /* Channel 14 */ }; static const struct ieee80211_channel rsi_5ghz_channels[] = { { .band = IEEE80211_BAND_5GHZ, .center_freq = 5180, .hw_value = 36, }, /* Channel 36 */ { .band = IEEE80211_BAND_5GHZ, .center_freq = 5200, .hw_value = 40, }, /* Channel 40 */ { .band = IEEE80211_BAND_5GHZ, .center_freq = 5220, .hw_value = 44, }, /* Channel 44 */ { .band = IEEE80211_BAND_5GHZ, .center_freq = 5240, .hw_value = 48, }, /* Channel 48 */ { .band = IEEE80211_BAND_5GHZ, .center_freq = 5260, .hw_value = 52, }, /* Channel 52 */ { .band = IEEE80211_BAND_5GHZ, .center_freq = 5280, .hw_value = 56, }, /* Channel 56 */ { .band = IEEE80211_BAND_5GHZ, .center_freq = 5300, .hw_value = 60, }, /* Channel 60 */ { .band = IEEE80211_BAND_5GHZ, .center_freq = 5320, .hw_value = 64, }, /* Channel 64 */ { .band = IEEE80211_BAND_5GHZ, .center_freq = 5500, .hw_value = 100, }, /* Channel 100 */ { .band = IEEE80211_BAND_5GHZ, .center_freq = 5520, .hw_value = 104, }, /* Channel 104 */ { .band = IEEE80211_BAND_5GHZ, .center_freq = 5540, .hw_value = 108, }, /* Channel 108 */ { .band = IEEE80211_BAND_5GHZ, .center_freq = 5560, .hw_value = 112, }, /* Channel 112 */ { .band = IEEE80211_BAND_5GHZ, .center_freq = 5580, .hw_value = 116, }, /* Channel 116 */ { .band = IEEE80211_BAND_5GHZ, .center_freq = 5600, .hw_value = 120, }, /* Channel 120 */ { .band = IEEE80211_BAND_5GHZ, .center_freq = 5620, .hw_value = 124, }, /* Channel 124 */ { .band = IEEE80211_BAND_5GHZ, .center_freq = 5640, .hw_value = 128, }, /* Channel 128 */ { .band = IEEE80211_BAND_5GHZ, .center_freq = 5660, .hw_value = 132, }, /* Channel 132 */ { .band = IEEE80211_BAND_5GHZ, .center_freq = 5680, .hw_value = 136, }, /* Channel 136 */ { .band = IEEE80211_BAND_5GHZ, .center_freq = 5700, .hw_value = 140, }, /* Channel 140 */ { .band = IEEE80211_BAND_5GHZ, .center_freq = 5745, .hw_value = 149, }, /* Channel 149 */ { .band = IEEE80211_BAND_5GHZ, .center_freq = 5765, .hw_value = 153, }, /* Channel 153 */ { .band = IEEE80211_BAND_5GHZ, .center_freq = 5785, .hw_value = 157, }, /* Channel 157 */ { .band = IEEE80211_BAND_5GHZ, .center_freq = 5805, .hw_value = 161, }, /* Channel 161 */ { .band = IEEE80211_BAND_5GHZ, .center_freq = 5825, .hw_value = 165, }, /* Channel 165 */ }; struct ieee80211_rate rsi_rates[12] = { { .bitrate = STD_RATE_01 * 5, .hw_value = RSI_RATE_1 }, { .bitrate = STD_RATE_02 * 5, .hw_value = RSI_RATE_2 }, { .bitrate = STD_RATE_5_5 * 5, .hw_value = RSI_RATE_5_5 }, { .bitrate = STD_RATE_11 * 5, .hw_value = RSI_RATE_11 }, { .bitrate = STD_RATE_06 * 5, .hw_value = RSI_RATE_6 }, { .bitrate = STD_RATE_09 * 5, .hw_value = RSI_RATE_9 }, { .bitrate = STD_RATE_12 * 5, .hw_value = RSI_RATE_12 }, { .bitrate = STD_RATE_18 * 5, .hw_value = RSI_RATE_18 }, { .bitrate = STD_RATE_24 * 5, .hw_value = RSI_RATE_24 }, { .bitrate = STD_RATE_36 * 5, .hw_value = RSI_RATE_36 }, { .bitrate = STD_RATE_48 * 5, .hw_value = RSI_RATE_48 }, { .bitrate = STD_RATE_54 * 5, .hw_value = RSI_RATE_54 }, }; const u16 rsi_mcsrates[8] = { RSI_RATE_MCS0, RSI_RATE_MCS1, RSI_RATE_MCS2, RSI_RATE_MCS3, RSI_RATE_MCS4, RSI_RATE_MCS5, RSI_RATE_MCS6, RSI_RATE_MCS7 }; /** * rsi_is_cipher_wep() - This function determines if the cipher is WEP or not. * @common: Pointer to the driver private structure. * * Return: If cipher type is WEP, a value of 1 is returned, else 0. */ bool rsi_is_cipher_wep(struct rsi_common *common) { if (((common->secinfo.gtk_cipher == WLAN_CIPHER_SUITE_WEP104) || (common->secinfo.gtk_cipher == WLAN_CIPHER_SUITE_WEP40)) && (!common->secinfo.ptk_cipher)) return true; else return false; } /** * rsi_register_rates_channels() - This function registers channels and rates. * @adapter: Pointer to the adapter structure. * @band: Operating band to be set. * * Return: None. */ static void rsi_register_rates_channels(struct rsi_hw *adapter, int band) { struct ieee80211_supported_band *sbands = &adapter->sbands[band]; void *channels = NULL; if (band == IEEE80211_BAND_2GHZ) { channels = kmalloc(sizeof(rsi_2ghz_channels), GFP_KERNEL); memcpy(channels, rsi_2ghz_channels, sizeof(rsi_2ghz_channels)); sbands->band = IEEE80211_BAND_2GHZ; sbands->n_channels = ARRAY_SIZE(rsi_2ghz_channels); sbands->bitrates = rsi_rates; sbands->n_bitrates = ARRAY_SIZE(rsi_rates); } else { channels = kmalloc(sizeof(rsi_5ghz_channels), GFP_KERNEL); memcpy(channels, rsi_5ghz_channels, sizeof(rsi_5ghz_channels)); sbands->band = IEEE80211_BAND_5GHZ; sbands->n_channels = ARRAY_SIZE(rsi_5ghz_channels); sbands->bitrates = &rsi_rates[4]; sbands->n_bitrates = ARRAY_SIZE(rsi_rates) - 4; } sbands->channels = channels; memset(&sbands->ht_cap, 0, sizeof(struct ieee80211_sta_ht_cap)); sbands->ht_cap.ht_supported = true; sbands->ht_cap.cap = (IEEE80211_HT_CAP_SUP_WIDTH_20_40 | IEEE80211_HT_CAP_SGI_20 | IEEE80211_HT_CAP_SGI_40); sbands->ht_cap.ampdu_factor = IEEE80211_HT_MAX_AMPDU_16K; sbands->ht_cap.ampdu_density = IEEE80211_HT_MPDU_DENSITY_NONE; sbands->ht_cap.mcs.rx_mask[0] = 0xff; sbands->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED; /* sbands->ht_cap.mcs.rx_highest = 0x82; */ } /** * rsi_mac80211_detach() - This function is used to de-initialize the * Mac80211 stack. * @adapter: Pointer to the adapter structure. * * Return: None. */ void rsi_mac80211_detach(struct rsi_hw *adapter) { struct ieee80211_hw *hw = adapter->hw; if (hw) { ieee80211_stop_queues(hw); ieee80211_unregister_hw(hw); ieee80211_free_hw(hw); } rsi_remove_dbgfs(adapter); } EXPORT_SYMBOL_GPL(rsi_mac80211_detach); /** * rsi_indicate_tx_status() - This function indicates the transmit status. * @adapter: Pointer to the adapter structure. * @skb: Pointer to the socket buffer structure. * @status: Status * * Return: None. */ void rsi_indicate_tx_status(struct rsi_hw *adapter, struct sk_buff *skb, int status) { struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); memset(info->driver_data, 0, IEEE80211_TX_INFO_DRIVER_DATA_SIZE); if (!status) info->flags |= IEEE80211_TX_STAT_ACK; ieee80211_tx_status_irqsafe(adapter->hw, skb); } /** * rsi_mac80211_tx() - This is the handler that 802.11 module calls for each * transmitted frame.SKB contains the buffer starting * from the IEEE 802.11 header. * @hw: Pointer to the ieee80211_hw structure. * @control: Pointer to the ieee80211_tx_control structure * @skb: Pointer to the socket buffer structure. * * Return: None */ static void rsi_mac80211_tx(struct ieee80211_hw *hw, struct ieee80211_tx_control *control, struct sk_buff *skb) { struct rsi_hw *adapter = hw->priv; struct rsi_common *common = adapter->priv; rsi_core_xmit(common, skb); } /** * rsi_mac80211_start() - This is first handler that 802.11 module calls, since * the driver init is complete by then, just * returns success. * @hw: Pointer to the ieee80211_hw structure. * * Return: 0 as success. */ static int rsi_mac80211_start(struct ieee80211_hw *hw) { struct rsi_hw *adapter = hw->priv; struct rsi_common *common = adapter->priv; mutex_lock(&common->mutex); common->iface_down = false; mutex_unlock(&common->mutex); return 0; } /** * rsi_mac80211_stop() - This is the last handler that 802.11 module calls. * @hw: Pointer to the ieee80211_hw structure. * * Return: None. */ static void rsi_mac80211_stop(struct ieee80211_hw *hw) { struct rsi_hw *adapter = hw->priv; struct rsi_common *common = adapter->priv; mutex_lock(&common->mutex); common->iface_down = true; mutex_unlock(&common->mutex); } /** * rsi_mac80211_add_interface() - This function is called when a netdevice * attached to the hardware is enabled. * @hw: Pointer to the ieee80211_hw structure. * @vif: Pointer to the ieee80211_vif structure. * * Return: ret: 0 on success, negative error code on failure. */ static int rsi_mac80211_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif) { struct rsi_hw *adapter = hw->priv; struct rsi_common *common = adapter->priv; int ret = -EOPNOTSUPP; mutex_lock(&common->mutex); switch (vif->type) { case NL80211_IFTYPE_STATION: if (!adapter->sc_nvifs) { ++adapter->sc_nvifs; adapter->vifs[0] = vif; ret = rsi_set_vap_capabilities(common, STA_OPMODE); } break; default: rsi_dbg(ERR_ZONE, "%s: Interface type %d not supported\n", __func__, vif->type); } mutex_unlock(&common->mutex); return ret; } /** * rsi_mac80211_remove_interface() - This function notifies driver that an * interface is going down. * @hw: Pointer to the ieee80211_hw structure. * @vif: Pointer to the ieee80211_vif structure. * * Return: None. */ static void rsi_mac80211_remove_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif) { struct rsi_hw *adapter = hw->priv; struct rsi_common *common = adapter->priv; mutex_lock(&common->mutex); if (vif->type == NL80211_IFTYPE_STATION) adapter->sc_nvifs--; if (!memcmp(adapter->vifs[0], vif, sizeof(struct ieee80211_vif))) adapter->vifs[0] = NULL; mutex_unlock(&common->mutex); } /** * rsi_channel_change() - This function is a performs the checks * required for changing a channel and sets * the channel accordingly. * @hw: Pointer to the ieee80211_hw structure. * * Return: 0 on success, negative error code on failure. */ static int rsi_channel_change(struct ieee80211_hw *hw) { struct rsi_hw *adapter = hw->priv; struct rsi_common *common = adapter->priv; int status = -EOPNOTSUPP; struct ieee80211_channel *curchan = hw->conf.chandef.chan; u16 channel = curchan->hw_value; struct ieee80211_bss_conf *bss = &adapter->vifs[0]->bss_conf; rsi_dbg(INFO_ZONE, "%s: Set channel: %d MHz type: %d channel_no %d\n", __func__, curchan->center_freq, curchan->flags, channel); if (bss->assoc) { if (!common->hw_data_qs_blocked && (rsi_get_connected_channel(adapter) != channel)) { rsi_dbg(INFO_ZONE, "blk data q %d\n", channel); if (!rsi_send_block_unblock_frame(common, true)) common->hw_data_qs_blocked = true; } } status = rsi_band_check(common); if (!status) status = rsi_set_channel(adapter->priv, channel); if (bss->assoc) { if (common->hw_data_qs_blocked && (rsi_get_connected_channel(adapter) == channel)) { rsi_dbg(INFO_ZONE, "unblk data q %d\n", channel); if (!rsi_send_block_unblock_frame(common, false)) common->hw_data_qs_blocked = false; } } else { if (common->hw_data_qs_blocked) { rsi_dbg(INFO_ZONE, "unblk data q %d\n", channel); if (!rsi_send_block_unblock_frame(common, false)) common->hw_data_qs_blocked = false; } } return status; } /** * rsi_mac80211_config() - This function is a handler for configuration * requests. The stack calls this function to * change hardware configuration, e.g., channel. * @hw: Pointer to the ieee80211_hw structure. * @changed: Changed flags set. * * Return: 0 on success, negative error code on failure. */ static int rsi_mac80211_config(struct ieee80211_hw *hw, u32 changed) { struct rsi_hw *adapter = hw->priv; struct rsi_common *common = adapter->priv; int status = -EOPNOTSUPP; mutex_lock(&common->mutex); if (changed & IEEE80211_CONF_CHANGE_CHANNEL) status = rsi_channel_change(hw); mutex_unlock(&common->mutex); return status; } /** * rsi_get_connected_channel() - This function is used to get the current * connected channel number. * @adapter: Pointer to the adapter structure. * * Return: Current connected AP's channel number is returned. */ u16 rsi_get_connected_channel(struct rsi_hw *adapter) { struct ieee80211_vif *vif = adapter->vifs[0]; if (vif) { struct ieee80211_bss_conf *bss = &vif->bss_conf; struct ieee80211_channel *channel = bss->chandef.chan; return channel->hw_value; } return 0; } /** * rsi_mac80211_bss_info_changed() - This function is a handler for config * requests related to BSS parameters that * may vary during BSS's lifespan. * @hw: Pointer to the ieee80211_hw structure. * @vif: Pointer to the ieee80211_vif structure. * @bss_conf: Pointer to the ieee80211_bss_conf structure. * @changed: Changed flags set. * * Return: None. */ static void rsi_mac80211_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_bss_conf *bss_conf, u32 changed) { struct rsi_hw *adapter = hw->priv; struct rsi_common *common = adapter->priv; mutex_lock(&common->mutex); if (changed & BSS_CHANGED_ASSOC) { rsi_dbg(INFO_ZONE, "%s: Changed Association status: %d\n", __func__, bss_conf->assoc); rsi_inform_bss_status(common, bss_conf->assoc, bss_conf->bssid, bss_conf->qos, bss_conf->aid); } if (changed & BSS_CHANGED_CQM) { common->cqm_info.last_cqm_event_rssi = 0; common->cqm_info.rssi_thold = bss_conf->cqm_rssi_thold; common->cqm_info.rssi_hyst = bss_conf->cqm_rssi_hyst; rsi_dbg(INFO_ZONE, "RSSI throld & hysteresis are: %d %d\n", common->cqm_info.rssi_thold, common->cqm_info.rssi_hyst); } mutex_unlock(&common->mutex); } /** * rsi_mac80211_conf_filter() - This function configure the device's RX filter. * @hw: Pointer to the ieee80211_hw structure. * @changed: Changed flags set. * @total_flags: Total initial flags set. * @multicast: Multicast. * * Return: None. */ static void rsi_mac80211_conf_filter(struct ieee80211_hw *hw, u32 changed_flags, u32 *total_flags, u64 multicast) { /* Not doing much here as of now */ *total_flags &= RSI_SUPP_FILTERS; } /** * rsi_mac80211_conf_tx() - This function configures TX queue parameters * (EDCF (aifs, cw_min, cw_max), bursting) * for a hardware TX queue. * @hw: Pointer to the ieee80211_hw structure * @vif: Pointer to the ieee80211_vif structure. * @queue: Queue number. * @params: Pointer to ieee80211_tx_queue_params structure. * * Return: 0 on success, negative error code on failure. */ static int rsi_mac80211_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif, u16 queue, const struct ieee80211_tx_queue_params *params) { struct rsi_hw *adapter = hw->priv; struct rsi_common *common = adapter->priv; u8 idx = 0; if (queue >= IEEE80211_NUM_ACS) return 0; rsi_dbg(INFO_ZONE, "%s: Conf queue %d, aifs: %d, cwmin: %d cwmax: %d, txop: %d\n", __func__, queue, params->aifs, params->cw_min, params->cw_max, params->txop); mutex_lock(&common->mutex); /* Map into the way the f/w expects */ switch (queue) { case IEEE80211_AC_VO: idx = VO_Q; break; case IEEE80211_AC_VI: idx = VI_Q; break; case IEEE80211_AC_BE: idx = BE_Q; break; case IEEE80211_AC_BK: idx = BK_Q; break; default: idx = BE_Q; break; } memcpy(&common->edca_params[idx], params, sizeof(struct ieee80211_tx_queue_params)); mutex_unlock(&common->mutex); return 0; } /** * rsi_hal_key_config() - This function loads the keys into the firmware. * @hw: Pointer to the ieee80211_hw structure. * @vif: Pointer to the ieee80211_vif structure. * @key: Pointer to the ieee80211_key_conf structure. * * Return: status: 0 on success, -1 on failure. */ static int rsi_hal_key_config(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_key_conf *key) { struct rsi_hw *adapter = hw->priv; int status; u8 key_type; if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) key_type = RSI_PAIRWISE_KEY; else key_type = RSI_GROUP_KEY; rsi_dbg(ERR_ZONE, "%s: Cipher 0x%x key_type: %d key_len: %d\n", __func__, key->cipher, key_type, key->keylen); if ((key->cipher == WLAN_CIPHER_SUITE_WEP104) || (key->cipher == WLAN_CIPHER_SUITE_WEP40)) { status = rsi_hal_load_key(adapter->priv, key->key, key->keylen, RSI_PAIRWISE_KEY, key->keyidx, key->cipher); if (status) return status; } return rsi_hal_load_key(adapter->priv, key->key, key->keylen, key_type, key->keyidx, key->cipher); } /** * rsi_mac80211_set_key() - This function sets type of key to be loaded. * @hw: Pointer to the ieee80211_hw structure. * @cmd: enum set_key_cmd. * @vif: Pointer to the ieee80211_vif structure. * @sta: Pointer to the ieee80211_sta structure. * @key: Pointer to the ieee80211_key_conf structure. * * Return: status: 0 on success, negative error code on failure. */ static int rsi_mac80211_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, struct ieee80211_vif *vif, struct ieee80211_sta *sta, struct ieee80211_key_conf *key) { struct rsi_hw *adapter = hw->priv; struct rsi_common *common = adapter->priv; struct security_info *secinfo = &common->secinfo; int status; mutex_lock(&common->mutex); switch (cmd) { case SET_KEY: secinfo->security_enable = true; status = rsi_hal_key_config(hw, vif, key); if (status) { mutex_unlock(&common->mutex); return status; } if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) secinfo->ptk_cipher = key->cipher; else secinfo->gtk_cipher = key->cipher; key->hw_key_idx = key->keyidx; key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; rsi_dbg(ERR_ZONE, "%s: RSI set_key\n", __func__); break; case DISABLE_KEY: secinfo->security_enable = false; rsi_dbg(ERR_ZONE, "%s: RSI del key\n", __func__); memset(key, 0, sizeof(struct ieee80211_key_conf)); status = rsi_hal_key_config(hw, vif, key); break; default: status = -EOPNOTSUPP; break; } mutex_unlock(&common->mutex); return status; } /** * rsi_mac80211_ampdu_action() - This function selects the AMPDU action for * the corresponding mlme_action flag and * informs the f/w regarding this. * @hw: Pointer to the ieee80211_hw structure. * @vif: Pointer to the ieee80211_vif structure. * @action: ieee80211_ampdu_mlme_action enum. * @sta: Pointer to the ieee80211_sta structure. * @tid: Traffic identifier. * @ssn: Pointer to ssn value. * @buf_size: Buffer size (for kernel version > 2.6.38). * @amsdu: is AMSDU in AMPDU allowed * * Return: status: 0 on success, negative error code on failure. */ static int rsi_mac80211_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif, enum ieee80211_ampdu_mlme_action action, struct ieee80211_sta *sta, unsigned short tid, unsigned short *ssn, unsigned char buf_size, bool amsdu) { int status = -EOPNOTSUPP; struct rsi_hw *adapter = hw->priv; struct rsi_common *common = adapter->priv; u16 seq_no = 0; u8 ii = 0; for (ii = 0; ii < RSI_MAX_VIFS; ii++) { if (vif == adapter->vifs[ii]) break; } mutex_lock(&common->mutex); rsi_dbg(INFO_ZONE, "%s: AMPDU action %d called\n", __func__, action); if (ssn != NULL) seq_no = *ssn; switch (action) { case IEEE80211_AMPDU_RX_START: status = rsi_send_aggregation_params_frame(common, tid, seq_no, buf_size, STA_RX_ADDBA_DONE); break; case IEEE80211_AMPDU_RX_STOP: status = rsi_send_aggregation_params_frame(common, tid, 0, buf_size, STA_RX_DELBA); break; case IEEE80211_AMPDU_TX_START: common->vif_info[ii].seq_start = seq_no; ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); status = 0; break; case IEEE80211_AMPDU_TX_STOP_CONT: case IEEE80211_AMPDU_TX_STOP_FLUSH: case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: status = rsi_send_aggregation_params_frame(common, tid, seq_no, buf_size, STA_TX_DELBA); if (!status) ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); break; case IEEE80211_AMPDU_TX_OPERATIONAL: status = rsi_send_aggregation_params_frame(common, tid, common->vif_info[ii] .seq_start, buf_size, STA_TX_ADDBA_DONE); break; default: rsi_dbg(ERR_ZONE, "%s: Uknown AMPDU action\n", __func__); break; } mutex_unlock(&common->mutex); return status; } /** * rsi_mac80211_set_rts_threshold() - This function sets rts threshold value. * @hw: Pointer to the ieee80211_hw structure. * @value: Rts threshold value. * * Return: 0 on success. */ static int rsi_mac80211_set_rts_threshold(struct ieee80211_hw *hw, u32 value) { struct rsi_hw *adapter = hw->priv; struct rsi_common *common = adapter->priv; mutex_lock(&common->mutex); common->rts_threshold = value; mutex_unlock(&common->mutex); return 0; } /** * rsi_mac80211_set_rate_mask() - This function sets bitrate_mask to be used. * @hw: Pointer to the ieee80211_hw structure * @vif: Pointer to the ieee80211_vif structure. * @mask: Pointer to the cfg80211_bitrate_mask structure. * * Return: 0 on success. */ static int rsi_mac80211_set_rate_mask(struct ieee80211_hw *hw, struct ieee80211_vif *vif, const struct cfg80211_bitrate_mask *mask) { struct rsi_hw *adapter = hw->priv; struct rsi_common *common = adapter->priv; enum ieee80211_band band = hw->conf.chandef.chan->band; mutex_lock(&common->mutex); common->fixedrate_mask[band] = 0; if (mask->control[band].legacy == 0xfff) { common->fixedrate_mask[band] = (mask->control[band].ht_mcs[0] << 12); } else { common->fixedrate_mask[band] = mask->control[band].legacy; } mutex_unlock(&common->mutex); return 0; } /** * rsi_perform_cqm() - This function performs cqm. * @common: Pointer to the driver private structure. * @bssid: pointer to the bssid. * @rssi: RSSI value. */ static void rsi_perform_cqm(struct rsi_common *common, u8 *bssid, s8 rssi) { struct rsi_hw *adapter = common->priv; s8 last_event = common->cqm_info.last_cqm_event_rssi; int thold = common->cqm_info.rssi_thold; u32 hyst = common->cqm_info.rssi_hyst; enum nl80211_cqm_rssi_threshold_event event; if (rssi < thold && (last_event == 0 || rssi < (last_event - hyst))) event = NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW; else if (rssi > thold && (last_event == 0 || rssi > (last_event + hyst))) event = NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH; else return; common->cqm_info.last_cqm_event_rssi = rssi; rsi_dbg(INFO_ZONE, "CQM: Notifying event: %d\n", event); ieee80211_cqm_rssi_notify(adapter->vifs[0], event, GFP_KERNEL); return; } /** * rsi_fill_rx_status() - This function fills rx status in * ieee80211_rx_status structure. * @hw: Pointer to the ieee80211_hw structure. * @skb: Pointer to the socket buffer structure. * @common: Pointer to the driver private structure. * @rxs: Pointer to the ieee80211_rx_status structure. * * Return: None. */ static void rsi_fill_rx_status(struct ieee80211_hw *hw, struct sk_buff *skb, struct rsi_common *common, struct ieee80211_rx_status *rxs) { struct ieee80211_bss_conf *bss = &common->priv->vifs[0]->bss_conf; struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); struct skb_info *rx_params = (struct skb_info *)info->driver_data; struct ieee80211_hdr *hdr; char rssi = rx_params->rssi; u8 hdrlen = 0; u8 channel = rx_params->channel; s32 freq; hdr = ((struct ieee80211_hdr *)(skb->data)); hdrlen = ieee80211_hdrlen(hdr->frame_control); memset(info, 0, sizeof(struct ieee80211_tx_info)); rxs->signal = -(rssi); rxs->band = common->band; freq = ieee80211_channel_to_frequency(channel, rxs->band); if (freq) rxs->freq = freq; if (ieee80211_has_protected(hdr->frame_control)) { if (rsi_is_cipher_wep(common)) { memmove(skb->data + 4, skb->data, hdrlen); skb_pull(skb, 4); } else { memmove(skb->data + 8, skb->data, hdrlen); skb_pull(skb, 8); rxs->flag |= RX_FLAG_MMIC_STRIPPED; } rxs->flag |= RX_FLAG_DECRYPTED; rxs->flag |= RX_FLAG_IV_STRIPPED; } /* CQM only for connected AP beacons, the RSSI is a weighted avg */ if (bss->assoc && !(memcmp(bss->bssid, hdr->addr2, ETH_ALEN))) { if (ieee80211_is_beacon(hdr->frame_control)) rsi_perform_cqm(common, hdr->addr2, rxs->signal); } return; } /** * rsi_indicate_pkt_to_os() - This function sends recieved packet to mac80211. * @common: Pointer to the driver private structure. * @skb: Pointer to the socket buffer structure. * * Return: None. */ void rsi_indicate_pkt_to_os(struct rsi_common *common, struct sk_buff *skb) { struct rsi_hw *adapter = common->priv; struct ieee80211_hw *hw = adapter->hw; struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb); if ((common->iface_down) || (!adapter->sc_nvifs)) { dev_kfree_skb(skb); return; } /* filling in the ieee80211_rx_status flags */ rsi_fill_rx_status(hw, skb, common, rx_status); ieee80211_rx_irqsafe(hw, skb); } static void rsi_set_min_rate(struct ieee80211_hw *hw, struct ieee80211_sta *sta, struct rsi_common *common) { u8 band = hw->conf.chandef.chan->band; u8 ii; u32 rate_bitmap; bool matched = false; common->bitrate_mask[band] = sta->supp_rates[band]; rate_bitmap = (common->fixedrate_mask[band] & sta->supp_rates[band]); if (rate_bitmap & 0xfff) { /* Find out the min rate */ for (ii = 0; ii < ARRAY_SIZE(rsi_rates); ii++) { if (rate_bitmap & BIT(ii)) { common->min_rate = rsi_rates[ii].hw_value; matched = true; break; } } } common->vif_info[0].is_ht = sta->ht_cap.ht_supported; if ((common->vif_info[0].is_ht) && (rate_bitmap >> 12)) { for (ii = 0; ii < ARRAY_SIZE(rsi_mcsrates); ii++) { if ((rate_bitmap >> 12) & BIT(ii)) { common->min_rate = rsi_mcsrates[ii]; matched = true; break; } } } if (!matched) common->min_rate = 0xffff; } /** * rsi_mac80211_sta_add() - This function notifies driver about a peer getting * connected. * @hw: pointer to the ieee80211_hw structure. * @vif: Pointer to the ieee80211_vif structure. * @sta: Pointer to the ieee80211_sta structure. * * Return: 0 on success, -1 on failure. */ static int rsi_mac80211_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_sta *sta) { struct rsi_hw *adapter = hw->priv; struct rsi_common *common = adapter->priv; mutex_lock(&common->mutex); rsi_set_min_rate(hw, sta, common); if ((sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_20) || (sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40)) { common->vif_info[0].sgi = true; } if (sta->ht_cap.ht_supported) ieee80211_start_tx_ba_session(sta, 0, 0); mutex_unlock(&common->mutex); return 0; } /** * rsi_mac80211_sta_remove() - This function notifies driver about a peer * getting disconnected. * @hw: Pointer to the ieee80211_hw structure. * @vif: Pointer to the ieee80211_vif structure. * @sta: Pointer to the ieee80211_sta structure. * * Return: 0 on success, -1 on failure. */ static int rsi_mac80211_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_sta *sta) { struct rsi_hw *adapter = hw->priv; struct rsi_common *common = adapter->priv; mutex_lock(&common->mutex); /* Resetting all the fields to default values */ common->bitrate_mask[IEEE80211_BAND_2GHZ] = 0; common->bitrate_mask[IEEE80211_BAND_5GHZ] = 0; common->min_rate = 0xffff; common->vif_info[0].is_ht = false; common->vif_info[0].sgi = false; common->vif_info[0].seq_start = 0; common->secinfo.ptk_cipher = 0; common->secinfo.gtk_cipher = 0; mutex_unlock(&common->mutex); return 0; } static struct ieee80211_ops mac80211_ops = { .tx = rsi_mac80211_tx, .start = rsi_mac80211_start, .stop = rsi_mac80211_stop, .add_interface = rsi_mac80211_add_interface, .remove_interface = rsi_mac80211_remove_interface, .config = rsi_mac80211_config, .bss_info_changed = rsi_mac80211_bss_info_changed, .conf_tx = rsi_mac80211_conf_tx, .configure_filter = rsi_mac80211_conf_filter, .set_key = rsi_mac80211_set_key, .set_rts_threshold = rsi_mac80211_set_rts_threshold, .set_bitrate_mask = rsi_mac80211_set_rate_mask, .ampdu_action = rsi_mac80211_ampdu_action, .sta_add = rsi_mac80211_sta_add, .sta_remove = rsi_mac80211_sta_remove, }; /** * rsi_mac80211_attach() - This function is used to initialize Mac80211 stack. * @common: Pointer to the driver private structure. * * Return: 0 on success, -1 on failure. */ int rsi_mac80211_attach(struct rsi_common *common) { int status = 0; struct ieee80211_hw *hw = NULL; struct wiphy *wiphy = NULL; struct rsi_hw *adapter = common->priv; u8 addr_mask[ETH_ALEN] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x3}; rsi_dbg(INIT_ZONE, "%s: Performing mac80211 attach\n", __func__); hw = ieee80211_alloc_hw(sizeof(struct rsi_hw), &mac80211_ops); if (!hw) { rsi_dbg(ERR_ZONE, "%s: ieee80211 hw alloc failed\n", __func__); return -ENOMEM; } wiphy = hw->wiphy; SET_IEEE80211_DEV(hw, adapter->device); hw->priv = adapter; adapter->hw = hw; ieee80211_hw_set(hw, SIGNAL_DBM); ieee80211_hw_set(hw, HAS_RATE_CONTROL); ieee80211_hw_set(hw, AMPDU_AGGREGATION); hw->queues = MAX_HW_QUEUES; hw->extra_tx_headroom = RSI_NEEDED_HEADROOM; hw->max_rates = 1; hw->max_rate_tries = MAX_RETRIES; hw->max_tx_aggregation_subframes = 6; rsi_register_rates_channels(adapter, IEEE80211_BAND_2GHZ); rsi_register_rates_channels(adapter, IEEE80211_BAND_5GHZ); hw->rate_control_algorithm = "AARF"; SET_IEEE80211_PERM_ADDR(hw, common->mac_addr); ether_addr_copy(hw->wiphy->addr_mask, addr_mask); wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION); wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; wiphy->retry_short = RETRY_SHORT; wiphy->retry_long = RETRY_LONG; wiphy->frag_threshold = IEEE80211_MAX_FRAG_THRESHOLD; wiphy->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD; wiphy->flags = 0; wiphy->available_antennas_rx = 1; wiphy->available_antennas_tx = 1; wiphy->bands[IEEE80211_BAND_2GHZ] = &adapter->sbands[IEEE80211_BAND_2GHZ]; wiphy->bands[IEEE80211_BAND_5GHZ] = &adapter->sbands[IEEE80211_BAND_5GHZ]; status = ieee80211_register_hw(hw); if (status) return status; return rsi_init_dbgfs(adapter); }