From a1777327126e184518e17e3c571540be72c73dce Mon Sep 17 00:00:00 2001 From: Avinash Patil Date: Mon, 22 Jun 2015 19:06:17 +0530 Subject: [PATCH] mwifiex: support for bypass tx queue This patch adds support for another TX queue in driver- bypass TX queue. This queue is used for sending data/mgmt packets while in disconnected state i.e. when port is yet not unblocked. TDLS setup packets would also be queued in this queue. Signed-off-by: Avinash Patil Signed-off-by: Kalle Valo --- drivers/net/wireless/mwifiex/cfg80211.c | 4 ++ drivers/net/wireless/mwifiex/init.c | 1 + drivers/net/wireless/mwifiex/main.c | 49 ++++++++++++++++++++++- drivers/net/wireless/mwifiex/main.h | 2 + drivers/net/wireless/mwifiex/wmm.c | 53 +++++++++++++++++++++++++ drivers/net/wireless/mwifiex/wmm.h | 4 ++ 6 files changed, 111 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/mwifiex/cfg80211.c b/drivers/net/wireless/mwifiex/cfg80211.c index 1d445cbbb31b..46f9dc2b1736 100644 --- a/drivers/net/wireless/mwifiex/cfg80211.c +++ b/drivers/net/wireless/mwifiex/cfg80211.c @@ -2789,6 +2789,7 @@ int mwifiex_del_virtual_intf(struct wiphy *wiphy, struct wireless_dev *wdev) { struct mwifiex_private *priv = mwifiex_netdev_get_priv(wdev->netdev); struct mwifiex_adapter *adapter = priv->adapter; + struct sk_buff *skb, *tmp; #ifdef CONFIG_DEBUG_FS mwifiex_dev_debugfs_remove(priv); @@ -2796,6 +2797,9 @@ int mwifiex_del_virtual_intf(struct wiphy *wiphy, struct wireless_dev *wdev) mwifiex_stop_net_dev_queue(priv->netdev, adapter); + skb_queue_walk_safe(&priv->bypass_txq, skb, tmp) + mwifiex_write_data_complete(priv->adapter, skb, 0, -1); + if (netif_carrier_ok(priv->netdev)) netif_carrier_off(priv->netdev); diff --git a/drivers/net/wireless/mwifiex/init.c b/drivers/net/wireless/mwifiex/init.c index df7fdc09d38c..e1b62bf0f7b4 100644 --- a/drivers/net/wireless/mwifiex/init.c +++ b/drivers/net/wireless/mwifiex/init.c @@ -499,6 +499,7 @@ int mwifiex_init_lock_list(struct mwifiex_adapter *adapter) INIT_LIST_HEAD(&priv->sta_list); INIT_LIST_HEAD(&priv->auto_tdls_list); skb_queue_head_init(&priv->tdls_txq); + skb_queue_head_init(&priv->bypass_txq); spin_lock_init(&priv->tx_ba_stream_tbl_lock); spin_lock_init(&priv->rx_reorder_tbl_lock); diff --git a/drivers/net/wireless/mwifiex/main.c b/drivers/net/wireless/mwifiex/main.c index 2a2e5dbab8dd..278dc94eaecb 100644 --- a/drivers/net/wireless/mwifiex/main.c +++ b/drivers/net/wireless/mwifiex/main.c @@ -276,6 +276,7 @@ process_start: !adapter->pm_wakeup_fw_try) && (is_command_pending(adapter) || !skb_queue_empty(&adapter->tx_data_q) || + !mwifiex_bypass_txlist_empty(adapter) || !mwifiex_wmm_lists_empty(adapter))) { adapter->pm_wakeup_fw_try = true; mod_timer(&adapter->wakeup_timer, jiffies + (HZ*3)); @@ -303,6 +304,7 @@ process_start: (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA)) || (mwifiex_wmm_lists_empty(adapter) && + mwifiex_bypass_txlist_empty(adapter) && skb_queue_empty(&adapter->tx_data_q))) { if (adapter->cmd_sent || adapter->curr_cmd || !mwifiex_is_send_cmd_allowed @@ -371,6 +373,22 @@ process_start: } } + if ((adapter->scan_chan_gap_enabled || + !adapter->scan_processing) && + !adapter->data_sent && + !mwifiex_bypass_txlist_empty(adapter) && + !mwifiex_is_tdls_chan_switching + (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA))) { + mwifiex_process_bypass_tx(adapter); + if (adapter->hs_activated) { + adapter->is_hs_configured = false; + mwifiex_hs_activated_event + (mwifiex_get_priv + (adapter, MWIFIEX_BSS_ROLE_ANY), + false); + } + } + if ((adapter->scan_chan_gap_enabled || !adapter->scan_processing) && !adapter->data_sent && !mwifiex_wmm_lists_empty(adapter) && @@ -389,6 +407,7 @@ process_start: if (adapter->delay_null_pkt && !adapter->cmd_sent && !adapter->curr_cmd && !is_command_pending(adapter) && (mwifiex_wmm_lists_empty(adapter) && + mwifiex_bypass_txlist_empty(adapter) && skb_queue_empty(&adapter->tx_data_q))) { if (!mwifiex_send_null_packet (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA), @@ -659,6 +678,26 @@ mwifiex_close(struct net_device *dev) return 0; } +static bool +mwifiex_bypass_tx_queue(struct mwifiex_private *priv, + struct sk_buff *skb) +{ + struct ethhdr *eth_hdr = (struct ethhdr *)skb->data; + + if (ntohs(eth_hdr->h_proto) == ETH_P_PAE || + mwifiex_is_skb_mgmt_frame(skb) || + (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA && + ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) && + (ntohs(eth_hdr->h_proto) == ETH_P_TDLS))) { + mwifiex_dbg(priv->adapter, DATA, + "bypass txqueue; eth type %#x, mgmt %d\n", + ntohs(eth_hdr->h_proto), + mwifiex_is_skb_mgmt_frame(skb)); + return true; + } + + return false; +} /* * Add buffer into wmm tx queue and queue work to transmit it. */ @@ -676,8 +715,14 @@ int mwifiex_queue_tx_pkt(struct mwifiex_private *priv, struct sk_buff *skb) } } - atomic_inc(&priv->adapter->tx_pending); - mwifiex_wmm_add_buf_txqueue(priv, skb); + if (mwifiex_bypass_tx_queue(priv, skb)) { + atomic_inc(&priv->adapter->tx_pending); + atomic_inc(&priv->adapter->bypass_tx_pending); + mwifiex_wmm_add_buf_bypass_txqueue(priv, skb); + } else { + atomic_inc(&priv->adapter->tx_pending); + mwifiex_wmm_add_buf_txqueue(priv, skb); + } mwifiex_queue_main_work(priv->adapter); diff --git a/drivers/net/wireless/mwifiex/main.h b/drivers/net/wireless/mwifiex/main.h index d74ef2dd21bc..c59430e906ae 100644 --- a/drivers/net/wireless/mwifiex/main.h +++ b/drivers/net/wireless/mwifiex/main.h @@ -664,6 +664,7 @@ struct mwifiex_private { struct cfg80211_beacon_data beacon_after; struct mwifiex_11h_intf_state state_11h; struct mwifiex_ds_mem_rw mem_rw; + struct sk_buff_head bypass_txq; }; @@ -834,6 +835,7 @@ struct mwifiex_adapter { wait_queue_head_t init_wait_q; void *card; struct mwifiex_if_ops if_ops; + atomic_t bypass_tx_pending; atomic_t rx_pending; atomic_t tx_pending; atomic_t cmd_pending; diff --git a/drivers/net/wireless/mwifiex/wmm.c b/drivers/net/wireless/mwifiex/wmm.c index 6196daad5a61..7995f92bc2d4 100644 --- a/drivers/net/wireless/mwifiex/wmm.c +++ b/drivers/net/wireless/mwifiex/wmm.c @@ -449,6 +449,11 @@ mwifiex_wmm_init(struct mwifiex_adapter *adapter) } } +int mwifiex_bypass_txlist_empty(struct mwifiex_adapter *adapter) +{ + return atomic_read(&adapter->bypass_tx_pending) ? false : true; +} + /* * This function checks if WMM Tx queue is empty. */ @@ -581,6 +586,10 @@ mwifiex_clean_txrx(struct mwifiex_private *priv) skb_queue_walk_safe(&priv->tdls_txq, skb, tmp) mwifiex_write_data_complete(priv->adapter, skb, 0, -1); + skb_queue_walk_safe(&priv->bypass_txq, skb, tmp) + mwifiex_write_data_complete(priv->adapter, skb, 0, -1); + atomic_set(&priv->adapter->bypass_tx_pending, 0); + idr_for_each(&priv->ack_status_frames, mwifiex_free_ack_frame, NULL); idr_destroy(&priv->ack_status_frames); } @@ -752,6 +761,18 @@ mwifiex_is_ralist_valid(struct mwifiex_private *priv, return false; } +/* + * This function adds a packet to bypass TX queue. + * This is special TX queue for packets which can be sent even when port_open + * is false. + */ +void +mwifiex_wmm_add_buf_bypass_txqueue(struct mwifiex_private *priv, + struct sk_buff *skb) +{ + skb_queue_tail(&priv->bypass_txq, skb); +} + /* * This function adds a packet to WMM queue. * @@ -1429,6 +1450,38 @@ mwifiex_dequeue_tx_packet(struct mwifiex_adapter *adapter) return 0; } +void mwifiex_process_bypass_tx(struct mwifiex_adapter *adapter) +{ + struct mwifiex_tx_param tx_param; + struct sk_buff *skb; + struct mwifiex_txinfo *tx_info; + struct mwifiex_private *priv; + int i; + + if (adapter->data_sent || adapter->tx_lock_flag) + return; + + for (i = 0; i < adapter->priv_num; ++i) { + priv = adapter->priv[i]; + + if (skb_queue_empty(&priv->bypass_txq)) + continue; + + skb = skb_dequeue(&priv->bypass_txq); + tx_info = MWIFIEX_SKB_TXCB(skb); + + /* no aggregation for bypass packets */ + tx_param.next_pkt_len = 0; + + if (mwifiex_process_tx(priv, skb, &tx_param) == -EBUSY) { + skb_queue_head(&priv->bypass_txq, skb); + tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT; + } else { + atomic_dec(&adapter->bypass_tx_pending); + } + } +} + /* * This function transmits the highest priority packet awaiting in the * WMM Queues. diff --git a/drivers/net/wireless/mwifiex/wmm.h b/drivers/net/wireless/mwifiex/wmm.h index c12dd0e9f008..38f09762bd2f 100644 --- a/drivers/net/wireless/mwifiex/wmm.h +++ b/drivers/net/wireless/mwifiex/wmm.h @@ -99,12 +99,16 @@ mwifiex_wmm_is_ra_list_empty(struct list_head *ra_list_hhead) void mwifiex_wmm_add_buf_txqueue(struct mwifiex_private *priv, struct sk_buff *skb); +void mwifiex_wmm_add_buf_bypass_txqueue(struct mwifiex_private *priv, + struct sk_buff *skb); void mwifiex_ralist_add(struct mwifiex_private *priv, const u8 *ra); void mwifiex_rotate_priolists(struct mwifiex_private *priv, struct mwifiex_ra_list_tbl *ra, int tid); int mwifiex_wmm_lists_empty(struct mwifiex_adapter *adapter); +int mwifiex_bypass_txlist_empty(struct mwifiex_adapter *adapter); void mwifiex_wmm_process_tx(struct mwifiex_adapter *adapter); +void mwifiex_process_bypass_tx(struct mwifiex_adapter *adapter); int mwifiex_is_ralist_valid(struct mwifiex_private *priv, struct mwifiex_ra_list_tbl *ra_list, int tid); -- 2.20.1