Return-path: Received: from mail-pb0-f42.google.com ([209.85.160.42]:56682 "EHLO mail-pb0-f42.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752987AbaFGPyA (ORCPT ); Sat, 7 Jun 2014 11:54:00 -0400 Received: by mail-pb0-f42.google.com with SMTP id md12so3721974pbc.1 for ; Sat, 07 Jun 2014 08:53:59 -0700 (PDT) From: Jahnavi Meher To: Cc: Jahnavi Meher , Jahnavi Meher Subject: [PATCH 4/4] rsi: Adding support for host based bgscan Date: Sun, 8 Jun 2014 02:53:21 +0530 Message-Id: <1402176201-8573-1-git-send-email-jahnavi.meher@gmail.com> (sfid-20140607_175405_949502_6E001FC5) Sender: linux-wireless-owner@vger.kernel.org List-ID: From: Jahnavi Meher Added support for performing host based bgscan. Signed-off-by: Jahnavi Meher --- drivers/net/wireless/rsi/rsi_91x_mac80211.c | 117 ++++++++++++++++++++++++--- drivers/net/wireless/rsi/rsi_91x_mgmt.c | 44 ++++++++++ drivers/net/wireless/rsi/rsi_main.h | 9 ++ drivers/net/wireless/rsi/rsi_mgmt.h | 3 +- 4 files changed, 161 insertions(+), 12 deletions(-) diff --git a/drivers/net/wireless/rsi/rsi_91x_mac80211.c b/drivers/net/wireless/rsi/rsi_91x_mac80211.c index 4700714..1cb3164 100644 --- a/drivers/net/wireless/rsi/rsi_91x_mac80211.c +++ b/drivers/net/wireless/rsi/rsi_91x_mac80211.c @@ -341,6 +341,59 @@ static void rsi_mac80211_remove_interface(struct ieee80211_hw *hw, } /** + * 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. @@ -357,17 +410,10 @@ static int rsi_mac80211_config(struct ieee80211_hw *hw, int status = -EOPNOTSUPP; mutex_lock(&common->mutex); - if (changed & IEEE80211_CONF_CHANGE_CHANNEL) { - struct ieee80211_channel *curchan = hw->conf.chandef.chan; - u16 channel = curchan->hw_value; - - rsi_dbg(INFO_ZONE, - "%s: Set channel: %d MHz type: %d channel_no %d\n", - __func__, curchan->center_freq, - curchan->flags, channel); - common->band = curchan->band; - status = rsi_set_channel(adapter->priv, channel); - } + + if (changed & IEEE80211_CONF_CHANGE_CHANNEL) + status = rsi_channel_change(hw); + mutex_unlock(&common->mutex); return status; @@ -421,6 +467,15 @@ static void rsi_mac80211_bss_info_changed(struct ieee80211_hw *hw, 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); } @@ -741,6 +796,37 @@ static int rsi_mac80211_set_rate_mask(struct ieee80211_hw *hw, } /** + * 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. @@ -755,6 +841,7 @@ static void rsi_fill_rx_status(struct ieee80211_hw *hw, 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; @@ -789,6 +876,14 @@ static void rsi_fill_rx_status(struct ieee80211_hw *hw, 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; } /** diff --git a/drivers/net/wireless/rsi/rsi_91x_mgmt.c b/drivers/net/wireless/rsi/rsi_91x_mgmt.c index ab14151..d1b454e 100644 --- a/drivers/net/wireless/rsi/rsi_91x_mgmt.c +++ b/drivers/net/wireless/rsi/rsi_91x_mgmt.c @@ -217,6 +217,7 @@ static void rsi_set_default_parameters(struct rsi_common *common) common->min_rate = 0xffff; common->fsm_state = FSM_CARD_NOT_READY; common->iface_down = true; + common->endpoint = 0; } /** @@ -1174,6 +1175,49 @@ static int rsi_eeprom_read(struct rsi_common *common) } /** + * This function sends a frame to block/unblock + * data queues in the firmware + * + * @param common Pointer to the driver private structure. + * @param block event - block if true, unblock if false + * @return 0 on success, -1 on failure. + */ +int rsi_send_block_unblock_frame(struct rsi_common *common, bool block_event) +{ + struct rsi_mac_frame *mgmt_frame; + struct sk_buff *skb; + + rsi_dbg(MGMT_TX_ZONE, "%s: Sending block/unblock frame\n", __func__); + + skb = dev_alloc_skb(FRAME_DESC_SZ); + if (!skb) { + rsi_dbg(ERR_ZONE, "%s: Failed in allocation of skb\n", + __func__); + return -ENOMEM; + } + + memset(skb->data, 0, FRAME_DESC_SZ); + mgmt_frame = (struct rsi_mac_frame *)skb->data; + + mgmt_frame->desc_word[0] = cpu_to_le16(RSI_WIFI_MGMT_Q << 12); + mgmt_frame->desc_word[1] = cpu_to_le16(BLOCK_HW_QUEUE); + + if (block_event == true) { + rsi_dbg(INFO_ZONE, "blocking the data qs\n"); + mgmt_frame->desc_word[4] = cpu_to_le16(0xf); + } else { + rsi_dbg(INFO_ZONE, "unblocking the data qs\n"); + mgmt_frame->desc_word[5] = cpu_to_le16(0xf); + } + + skb_put(skb, FRAME_DESC_SZ); + + return rsi_send_internal_mgmt_frame(common, skb); + +} + + +/** * rsi_handle_ta_confirm_type() - This function handles the confirm frames. * @common: Pointer to the driver private structure. * @msg: Pointer to received packet. diff --git a/drivers/net/wireless/rsi/rsi_main.h b/drivers/net/wireless/rsi/rsi_main.h index 8629131..5baed94 100644 --- a/drivers/net/wireless/rsi/rsi_main.h +++ b/drivers/net/wireless/rsi/rsi_main.h @@ -142,6 +142,12 @@ struct rsi_thread { atomic_t thread_done; }; +struct cqm_info { + s8 last_cqm_event_rssi; + int rssi_thold; + u32 rssi_hyst; +}; + struct rsi_hw; struct rsi_common { @@ -194,6 +200,9 @@ struct rsi_common { u32 pkt_cnt; u8 min_weight; + /* bgscan related */ + struct cqm_info cqm_info; + bool hw_data_qs_blocked; }; diff --git a/drivers/net/wireless/rsi/rsi_mgmt.h b/drivers/net/wireless/rsi/rsi_mgmt.h index 5470d01..8b3c5c3 100644 --- a/drivers/net/wireless/rsi/rsi_mgmt.h +++ b/drivers/net/wireless/rsi/rsi_mgmt.h @@ -153,7 +153,7 @@ enum cmd_frame_type { SCAN_REQUEST, TSF_UPDATE, PEER_NOTIFY, - BLOCK_UNBLOCK, + BLOCK_HW_QUEUE, SET_KEY_REQ, AUTO_RATE_IND, BOOTUP_PARAMS_REQUEST, @@ -272,6 +272,7 @@ int rsi_send_aggregation_params_frame(struct rsi_common *common, u16 tid, int rsi_hal_load_key(struct rsi_common *common, u8 *data, u16 key_len, u8 key_type, u8 key_id, u32 cipher); int rsi_set_channel(struct rsi_common *common, u16 chno); +int rsi_send_block_unblock_frame(struct rsi_common *common, bool event); void rsi_inform_bss_status(struct rsi_common *common, u8 status, const u8 *bssid, u8 qos_enable, u16 aid); void rsi_indicate_pkt_to_os(struct rsi_common *common, struct sk_buff *skb); -- 1.7.1