From e6d6428449c5d2aa077e69630d7abf041cf9ba99 Mon Sep 17 00:00:00 2001 From: Prameela Rani Garnepudi Date: Fri, 18 Nov 2016 16:07:09 +0530 Subject: [PATCH] rsi: Add support to filter rx frames Filtering rx frames after connection in station mode avoids the overhead of processing un-necessary frames. Hence rx filter frame is added which can be configured to device at suitable times. Signed-off-by: Prameela Rani Garnepudi Signed-off-by: Kalle Valo --- drivers/net/wireless/rsi/rsi_91x_mac80211.c | 16 +++++++++- drivers/net/wireless/rsi/rsi_91x_mgmt.c | 33 +++++++++++++++++++++ drivers/net/wireless/rsi/rsi_mgmt.h | 11 +++++++ 3 files changed, 59 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/rsi/rsi_91x_mac80211.c b/drivers/net/wireless/rsi/rsi_91x_mac80211.c index aaca25870bc1..6f065d31320b 100644 --- a/drivers/net/wireless/rsi/rsi_91x_mac80211.c +++ b/drivers/net/wireless/rsi/rsi_91x_mac80211.c @@ -275,6 +275,8 @@ static int rsi_mac80211_start(struct ieee80211_hw *hw) common->iface_down = false; mutex_unlock(&common->mutex); + rsi_send_rx_filter_frame(common, 0); + return 0; } @@ -471,11 +473,19 @@ static void rsi_mac80211_bss_info_changed(struct ieee80211_hw *hw, { struct rsi_hw *adapter = hw->priv; struct rsi_common *common = adapter->priv; + u16 rx_filter_word = 0; mutex_lock(&common->mutex); if (changed & BSS_CHANGED_ASSOC) { rsi_dbg(INFO_ZONE, "%s: Changed Association status: %d\n", __func__, bss_conf->assoc); + if (bss_conf->assoc) { + /* Send the RX filter frame */ + rx_filter_word = (ALLOW_DATA_ASSOC_PEER | + ALLOW_CTRL_ASSOC_PEER | + ALLOW_MGMT_ASSOC_PEER); + rsi_send_rx_filter_frame(common, rx_filter_word); + } rsi_inform_bss_status(common, bss_conf->assoc, bss_conf->bssid, @@ -1013,6 +1023,7 @@ static int rsi_mac80211_sta_remove(struct ieee80211_hw *hw, struct rsi_common *common = adapter->priv; mutex_lock(&common->mutex); + /* Resetting all the fields to default values */ common->bitrate_mask[NL80211_BAND_2GHZ] = 0; common->bitrate_mask[NL80211_BAND_5GHZ] = 0; @@ -1022,8 +1033,11 @@ static int rsi_mac80211_sta_remove(struct ieee80211_hw *hw, common->vif_info[0].seq_start = 0; common->secinfo.ptk_cipher = 0; common->secinfo.gtk_cipher = 0; - mutex_unlock(&common->mutex); + rsi_send_rx_filter_frame(common, 0); + + mutex_unlock(&common->mutex); + return 0; } diff --git a/drivers/net/wireless/rsi/rsi_91x_mgmt.c b/drivers/net/wireless/rsi/rsi_91x_mgmt.c index 30b9d44ff8f8..631cdb13c336 100644 --- a/drivers/net/wireless/rsi/rsi_91x_mgmt.c +++ b/drivers/net/wireless/rsi/rsi_91x_mgmt.c @@ -1243,6 +1243,39 @@ int rsi_send_block_unblock_frame(struct rsi_common *common, bool block_event) } +/** + * rsi_send_rx_filter_frame() - Sends a frame to filter the RX packets + * + * @common: Pointer to the driver private structure. + * @rx_filter_word: Flags of filter packets + * + * @Return: 0 on success, -1 on failure. + */ +int rsi_send_rx_filter_frame(struct rsi_common *common, u16 rx_filter_word) +{ + struct rsi_mac_frame *cmd_frame; + struct sk_buff *skb; + + rsi_dbg(MGMT_TX_ZONE, "Sending RX filter frame\n"); + + 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); + cmd_frame = (struct rsi_mac_frame *)skb->data; + + cmd_frame->desc_word[0] = cpu_to_le16(RSI_WIFI_MGMT_Q << 12); + cmd_frame->desc_word[1] = cpu_to_le16(SET_RX_FILTER); + cmd_frame->desc_word[4] = cpu_to_le16(rx_filter_word); + + 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. diff --git a/drivers/net/wireless/rsi/rsi_mgmt.h b/drivers/net/wireless/rsi/rsi_mgmt.h index d1553581e471..2cf6542ddc02 100644 --- a/drivers/net/wireless/rsi/rsi_mgmt.h +++ b/drivers/net/wireless/rsi/rsi_mgmt.h @@ -140,6 +140,16 @@ #define RSI_SUPP_FILTERS (FIF_ALLMULTI | FIF_PROBE_REQ |\ FIF_BCN_PRBRESP_PROMISC) + +/* Rx filter word definitions */ +#define PROMISCOUS_MODE BIT(0) +#define ALLOW_DATA_ASSOC_PEER BIT(1) +#define ALLOW_MGMT_ASSOC_PEER BIT(2) +#define ALLOW_CTRL_ASSOC_PEER BIT(3) +#define DISALLOW_BEACONS BIT(4) +#define ALLOW_CONN_PEER_MGMT_WHILE_BUF_FULL BIT(5) +#define DISALLOW_BROADCAST_DATA BIT(6) + enum opmode { STA_OPMODE = 1, AP_OPMODE = 2 @@ -313,4 +323,5 @@ void rsi_core_xmit(struct rsi_common *common, struct sk_buff *skb); int rsi_send_mgmt_pkt(struct rsi_common *common, struct sk_buff *skb); int rsi_send_data_pkt(struct rsi_common *common, struct sk_buff *skb); int rsi_band_check(struct rsi_common *common); +int rsi_send_rx_filter_frame(struct rsi_common *common, u16 rx_filter_word); #endif -- 2.20.1