298 lines
8.1 KiB
C
298 lines
8.1 KiB
C
/*
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* Marvell Wireless LAN device driver: AP event handling
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*
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* Copyright (C) 2012, Marvell International Ltd.
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*
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* This software file (the "File") is distributed by Marvell International
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* Ltd. under the terms of the GNU General Public License Version 2, June 1991
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* (the "License"). You may use, redistribute and/or modify this File in
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* accordance with the terms and conditions of the License, a copy of which
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* is available by writing to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
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* worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
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*
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* THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
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* ARE EXPRESSLY DISCLAIMED. The License provides additional details about
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* this warranty disclaimer.
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*/
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#include "decl.h"
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#include "main.h"
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#include "11n.h"
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/*
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* This function will return the pointer to station entry in station list
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* table which matches specified mac address.
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* This function should be called after acquiring RA list spinlock.
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* NULL is returned if station entry is not found in associated STA list.
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*/
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struct mwifiex_sta_node *
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mwifiex_get_sta_entry(struct mwifiex_private *priv, u8 *mac)
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{
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struct mwifiex_sta_node *node;
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if (!mac)
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return NULL;
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list_for_each_entry(node, &priv->sta_list, list) {
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if (!memcmp(node->mac_addr, mac, ETH_ALEN))
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return node;
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}
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return NULL;
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}
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/*
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* This function will add a sta_node entry to associated station list
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* table with the given mac address.
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* If entry exist already, existing entry is returned.
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* If received mac address is NULL, NULL is returned.
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*/
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static struct mwifiex_sta_node *
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mwifiex_add_sta_entry(struct mwifiex_private *priv, u8 *mac)
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{
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struct mwifiex_sta_node *node;
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unsigned long flags;
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if (!mac)
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return NULL;
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spin_lock_irqsave(&priv->sta_list_spinlock, flags);
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node = mwifiex_get_sta_entry(priv, mac);
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if (node)
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goto done;
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node = kzalloc(sizeof(struct mwifiex_sta_node), GFP_ATOMIC);
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if (!node)
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goto done;
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memcpy(node->mac_addr, mac, ETH_ALEN);
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list_add_tail(&node->list, &priv->sta_list);
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done:
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spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
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return node;
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}
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/*
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* This function will search for HT IE in association request IEs
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* and set station HT parameters accordingly.
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*/
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static void
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mwifiex_set_sta_ht_cap(struct mwifiex_private *priv, const u8 *ies,
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int ies_len, struct mwifiex_sta_node *node)
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{
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const struct ieee80211_ht_cap *ht_cap;
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if (!ies)
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return;
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ht_cap = (void *)cfg80211_find_ie(WLAN_EID_HT_CAPABILITY, ies, ies_len);
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if (ht_cap) {
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node->is_11n_enabled = 1;
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node->max_amsdu = le16_to_cpu(ht_cap->cap_info) &
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IEEE80211_HT_CAP_MAX_AMSDU ?
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MWIFIEX_TX_DATA_BUF_SIZE_8K :
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MWIFIEX_TX_DATA_BUF_SIZE_4K;
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} else {
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node->is_11n_enabled = 0;
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}
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return;
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}
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/*
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* This function will delete a station entry from station list
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*/
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static void mwifiex_del_sta_entry(struct mwifiex_private *priv, u8 *mac)
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{
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struct mwifiex_sta_node *node, *tmp;
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unsigned long flags;
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spin_lock_irqsave(&priv->sta_list_spinlock, flags);
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node = mwifiex_get_sta_entry(priv, mac);
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if (node) {
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list_for_each_entry_safe(node, tmp, &priv->sta_list,
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list) {
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list_del(&node->list);
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kfree(node);
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}
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}
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spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
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return;
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}
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/*
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* This function will delete all stations from associated station list.
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*/
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static void mwifiex_del_all_sta_list(struct mwifiex_private *priv)
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{
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struct mwifiex_sta_node *node, *tmp;
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unsigned long flags;
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spin_lock_irqsave(&priv->sta_list_spinlock, flags);
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list_for_each_entry_safe(node, tmp, &priv->sta_list, list) {
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list_del(&node->list);
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kfree(node);
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}
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INIT_LIST_HEAD(&priv->sta_list);
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spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
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return;
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}
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/*
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* This function handles AP interface specific events generated by firmware.
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*
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* Event specific routines are called by this function based
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* upon the generated event cause.
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*
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*
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* Events supported for AP -
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* - EVENT_UAP_STA_ASSOC
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* - EVENT_UAP_STA_DEAUTH
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* - EVENT_UAP_BSS_ACTIVE
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* - EVENT_UAP_BSS_START
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* - EVENT_UAP_BSS_IDLE
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* - EVENT_UAP_MIC_COUNTERMEASURES:
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*/
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int mwifiex_process_uap_event(struct mwifiex_private *priv)
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{
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struct mwifiex_adapter *adapter = priv->adapter;
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int len, i;
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u32 eventcause = adapter->event_cause;
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struct station_info sinfo;
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struct mwifiex_assoc_event *event;
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struct mwifiex_sta_node *node;
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u8 *deauth_mac;
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struct host_cmd_ds_11n_batimeout *ba_timeout;
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u16 ctrl;
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switch (eventcause) {
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case EVENT_UAP_STA_ASSOC:
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memset(&sinfo, 0, sizeof(sinfo));
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event = (struct mwifiex_assoc_event *)
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(adapter->event_body + MWIFIEX_UAP_EVENT_EXTRA_HEADER);
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if (le16_to_cpu(event->type) == TLV_TYPE_UAP_MGMT_FRAME) {
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len = -1;
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if (ieee80211_is_assoc_req(event->frame_control))
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len = 0;
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else if (ieee80211_is_reassoc_req(event->frame_control))
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/* There will be ETH_ALEN bytes of
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* current_ap_addr before the re-assoc ies.
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*/
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len = ETH_ALEN;
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if (len != -1) {
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sinfo.filled = STATION_INFO_ASSOC_REQ_IES;
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sinfo.assoc_req_ies = &event->data[len];
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len = (u8 *)sinfo.assoc_req_ies -
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(u8 *)&event->frame_control;
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sinfo.assoc_req_ies_len =
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le16_to_cpu(event->len) - (u16)len;
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}
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}
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cfg80211_new_sta(priv->netdev, event->sta_addr, &sinfo,
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GFP_KERNEL);
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node = mwifiex_add_sta_entry(priv, event->sta_addr);
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if (!node) {
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dev_warn(adapter->dev,
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"could not create station entry!\n");
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return -1;
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}
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if (!priv->ap_11n_enabled)
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break;
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mwifiex_set_sta_ht_cap(priv, sinfo.assoc_req_ies,
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sinfo.assoc_req_ies_len, node);
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for (i = 0; i < MAX_NUM_TID; i++) {
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if (node->is_11n_enabled)
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node->ampdu_sta[i] =
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priv->aggr_prio_tbl[i].ampdu_user;
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else
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node->ampdu_sta[i] = BA_STREAM_NOT_ALLOWED;
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}
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memset(node->rx_seq, 0xff, sizeof(node->rx_seq));
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break;
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case EVENT_UAP_STA_DEAUTH:
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deauth_mac = adapter->event_body +
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MWIFIEX_UAP_EVENT_EXTRA_HEADER;
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cfg80211_del_sta(priv->netdev, deauth_mac, GFP_KERNEL);
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if (priv->ap_11n_enabled) {
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mwifiex_11n_del_rx_reorder_tbl_by_ta(priv, deauth_mac);
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mwifiex_del_tx_ba_stream_tbl_by_ra(priv, deauth_mac);
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}
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mwifiex_del_sta_entry(priv, deauth_mac);
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break;
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case EVENT_UAP_BSS_IDLE:
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priv->media_connected = false;
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if (netif_carrier_ok(priv->netdev))
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netif_carrier_off(priv->netdev);
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mwifiex_stop_net_dev_queue(priv->netdev, adapter);
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mwifiex_clean_txrx(priv);
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mwifiex_del_all_sta_list(priv);
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break;
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case EVENT_UAP_BSS_ACTIVE:
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priv->media_connected = true;
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if (!netif_carrier_ok(priv->netdev))
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netif_carrier_on(priv->netdev);
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mwifiex_wake_up_net_dev_queue(priv->netdev, adapter);
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break;
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case EVENT_UAP_BSS_START:
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dev_dbg(adapter->dev, "AP EVENT: event id: %#x\n", eventcause);
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memcpy(priv->netdev->dev_addr, adapter->event_body + 2,
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ETH_ALEN);
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break;
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case EVENT_UAP_MIC_COUNTERMEASURES:
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/* For future development */
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dev_dbg(adapter->dev, "AP EVENT: event id: %#x\n", eventcause);
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break;
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case EVENT_AMSDU_AGGR_CTRL:
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ctrl = le16_to_cpu(*(__le16 *)adapter->event_body);
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dev_dbg(adapter->dev, "event: AMSDU_AGGR_CTRL %d\n", ctrl);
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if (priv->media_connected) {
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adapter->tx_buf_size =
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min_t(u16, adapter->curr_tx_buf_size, ctrl);
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dev_dbg(adapter->dev, "event: tx_buf_size %d\n",
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adapter->tx_buf_size);
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}
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break;
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case EVENT_ADDBA:
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dev_dbg(adapter->dev, "event: ADDBA Request\n");
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if (priv->media_connected)
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mwifiex_send_cmd_async(priv, HostCmd_CMD_11N_ADDBA_RSP,
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HostCmd_ACT_GEN_SET, 0,
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adapter->event_body);
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break;
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case EVENT_DELBA:
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dev_dbg(adapter->dev, "event: DELBA Request\n");
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if (priv->media_connected)
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mwifiex_11n_delete_ba_stream(priv, adapter->event_body);
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break;
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case EVENT_BA_STREAM_TIEMOUT:
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dev_dbg(adapter->dev, "event: BA Stream timeout\n");
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if (priv->media_connected) {
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ba_timeout = (void *)adapter->event_body;
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mwifiex_11n_ba_stream_timeout(priv, ba_timeout);
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}
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break;
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default:
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dev_dbg(adapter->dev, "event: unknown event id: %#x\n",
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eventcause);
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break;
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}
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return 0;
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}
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