From: Jahnavi Meher <[email protected]>
Added support for performing host based bgscan.
Signed-off-by: Jahnavi Meher <[email protected]>
---
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