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* Copyright 2002-2005, Instant802 Networks, Inc.
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* Copyright 2005-2006, Devicescape Software, Inc.
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* Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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#include <net/mac80211.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/netdevice.h>
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#include <linux/types.h>
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#include <linux/slab.h>
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#include <linux/skbuff.h>
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#include <linux/etherdevice.h>
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#include <linux/if_arp.h>
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#include <linux/rtnetlink.h>
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#include <linux/bitmap.h>
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#include <linux/pm_qos.h>
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#include <linux/inetdevice.h>
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#include <net/net_namespace.h>
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#include <net/cfg80211.h>
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#include "ieee80211_i.h"
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#include "driver-ops.h"
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static struct lock_class_key ieee80211_rx_skb_queue_class;
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void ieee80211_configure_filter(struct ieee80211_local *local)
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unsigned int changed_flags;
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unsigned int new_flags = 0;
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if (atomic_read(&local->iff_promiscs))
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new_flags |= FIF_PROMISC_IN_BSS;
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if (atomic_read(&local->iff_allmultis))
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new_flags |= FIF_ALLMULTI;
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if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
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test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
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new_flags |= FIF_BCN_PRBRESP_PROMISC;
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if (local->fif_probe_req || local->probe_req_reg)
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new_flags |= FIF_PROBE_REQ;
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if (local->fif_fcsfail)
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new_flags |= FIF_FCSFAIL;
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if (local->fif_plcpfail)
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new_flags |= FIF_PLCPFAIL;
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if (local->fif_control)
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new_flags |= FIF_CONTROL;
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if (local->fif_other_bss)
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new_flags |= FIF_OTHER_BSS;
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if (local->fif_pspoll)
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new_flags |= FIF_PSPOLL;
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spin_lock_bh(&local->filter_lock);
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changed_flags = local->filter_flags ^ new_flags;
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#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
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mc = drv_prepare_multicast(local, &local->mc_list);
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mc = drv_prepare_multicast(local, local->mc_count, local->mc_list);
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spin_unlock_bh(&local->filter_lock);
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drv_configure_filter(local, changed_flags, &new_flags, mc);
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WARN_ON(new_flags & (1<<31));
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local->filter_flags = new_flags & ~(1<<31);
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static void ieee80211_reconfig_filter(struct work_struct *work)
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struct ieee80211_local *local =
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container_of(work, struct ieee80211_local, reconfig_filter);
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ieee80211_configure_filter(local);
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int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
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struct ieee80211_channel *chan;
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enum nl80211_channel_type channel_type;
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offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
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if (local->scan_channel) {
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chan = local->scan_channel;
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/* If scanning on oper channel, use whatever channel-type
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* is currently in use.
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if (chan == local->oper_channel)
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channel_type = local->_oper_channel_type;
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channel_type = NL80211_CHAN_NO_HT;
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} else if (local->tmp_channel) {
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chan = local->tmp_channel;
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channel_type = local->tmp_channel_type;
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chan = local->oper_channel;
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channel_type = local->_oper_channel_type;
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if (chan != local->oper_channel ||
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channel_type != local->_oper_channel_type)
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local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
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local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
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offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
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if (offchannel_flag || chan != local->hw.conf.channel ||
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channel_type != local->hw.conf.channel_type) {
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local->hw.conf.channel = chan;
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local->hw.conf.channel_type = channel_type;
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changed |= IEEE80211_CONF_CHANGE_CHANNEL;
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if (!conf_is_ht(&local->hw.conf)) {
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* mac80211.h documents that this is only valid
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* when the channel is set to an HT type, and
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* that otherwise STATIC is used.
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local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
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} else if (local->hw.conf.smps_mode != local->smps_mode) {
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local->hw.conf.smps_mode = local->smps_mode;
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changed |= IEEE80211_CONF_CHANGE_SMPS;
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if (test_bit(SCAN_SW_SCANNING, &local->scanning) ||
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test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning) ||
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test_bit(SCAN_HW_SCANNING, &local->scanning))
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power = chan->max_power;
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power = local->power_constr_level ?
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(chan->max_reg_power - local->power_constr_level)) :
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if (local->user_power_level >= 0)
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power = min(power, local->user_power_level);
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if (local->hw.conf.power_level != power) {
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changed |= IEEE80211_CONF_CHANGE_POWER;
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local->hw.conf.power_level = power;
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if (changed && local->open_count) {
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ret = drv_config(local, changed);
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* HW reconfiguration should never fail, the driver has told
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* us what it can support so it should live up to that promise.
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* rfkill is not integrated with mac80211 and a
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* configuration command can thus fail if hardware rfkill
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* FIXME: integrate rfkill with mac80211 and then add this
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void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
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struct ieee80211_local *local = sdata->local;
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static const u8 zero[ETH_ALEN] = { 0 };
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if (sdata->vif.type == NL80211_IFTYPE_STATION) {
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sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
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} else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
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sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
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else if (sdata->vif.type == NL80211_IFTYPE_AP)
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sdata->vif.bss_conf.bssid = sdata->vif.addr;
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else if (sdata->vif.type == NL80211_IFTYPE_WDS)
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sdata->vif.bss_conf.bssid = NULL;
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else if (ieee80211_vif_is_mesh(&sdata->vif)) {
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sdata->vif.bss_conf.bssid = zero;
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switch (sdata->vif.type) {
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case NL80211_IFTYPE_AP:
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case NL80211_IFTYPE_ADHOC:
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case NL80211_IFTYPE_WDS:
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case NL80211_IFTYPE_MESH_POINT:
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/* do not warn to simplify caller in scan.c */
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changed &= ~BSS_CHANGED_BEACON_ENABLED;
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if (WARN_ON(changed & BSS_CHANGED_BEACON))
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if (changed & BSS_CHANGED_BEACON_ENABLED) {
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if (local->quiescing || !ieee80211_sdata_running(sdata) ||
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test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state)) {
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sdata->vif.bss_conf.enable_beacon = false;
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* Beacon should be enabled, but AP mode must
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* check whether there is a beacon configured.
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switch (sdata->vif.type) {
243
case NL80211_IFTYPE_AP:
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sdata->vif.bss_conf.enable_beacon =
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!!sdata->u.ap.beacon;
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case NL80211_IFTYPE_ADHOC:
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sdata->vif.bss_conf.enable_beacon =
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!!sdata->u.ibss.presp;
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#ifdef CONFIG_MAC80211_MESH
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case NL80211_IFTYPE_MESH_POINT:
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sdata->vif.bss_conf.enable_beacon =
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!!sdata->u.mesh.mesh_id_len;
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drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
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u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
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sdata->vif.bss_conf.use_cts_prot = false;
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sdata->vif.bss_conf.use_short_preamble = false;
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sdata->vif.bss_conf.use_short_slot = false;
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return BSS_CHANGED_ERP_CTS_PROT |
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BSS_CHANGED_ERP_PREAMBLE |
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BSS_CHANGED_ERP_SLOT;
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static void ieee80211_tasklet_handler(unsigned long data)
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struct ieee80211_local *local = (struct ieee80211_local *) data;
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struct sta_info *sta, *tmp;
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struct skb_eosp_msg_data *eosp_data;
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while ((skb = skb_dequeue(&local->skb_queue)) ||
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(skb = skb_dequeue(&local->skb_queue_unreliable))) {
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switch (skb->pkt_type) {
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case IEEE80211_RX_MSG:
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/* Clear skb->pkt_type in order to not confuse kernel
292
ieee80211_rx(&local->hw, skb);
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case IEEE80211_TX_STATUS_MSG:
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ieee80211_tx_status(&local->hw, skb);
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case IEEE80211_EOSP_MSG:
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eosp_data = (void *)skb->cb;
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for_each_sta_info(local, eosp_data->sta, sta, tmp) {
301
/* skip wrong virtual interface */
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if (memcmp(eosp_data->iface,
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sta->sdata->vif.addr, ETH_ALEN))
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clear_sta_flag(sta, WLAN_STA_SP);
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WARN(1, "mac80211: Packet is of unknown type %d\n",
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static void ieee80211_restart_work(struct work_struct *work)
321
struct ieee80211_local *local =
322
container_of(work, struct ieee80211_local, restart_work);
324
/* wait for scan work complete */
325
flush_workqueue(local->workqueue);
327
mutex_lock(&local->mtx);
328
WARN(test_bit(SCAN_HW_SCANNING, &local->scanning) ||
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rcu_dereference_protected(local->sched_scan_sdata,
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lockdep_is_held(&local->mtx)),
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"%s called with hardware scan in progress\n", __func__);
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mutex_unlock(&local->mtx);
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ieee80211_scan_cancel(local);
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ieee80211_reconfig(local);
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void ieee80211_restart_hw(struct ieee80211_hw *hw)
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struct ieee80211_local *local = hw_to_local(hw);
344
trace_api_restart_hw(local);
346
wiphy_info(hw->wiphy,
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"Hardware restart was requested\n");
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/* use this reason, ieee80211_reconfig will unblock it */
350
ieee80211_stop_queues_by_reason(hw,
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IEEE80211_QUEUE_STOP_REASON_SUSPEND);
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* Stop all Rx during the reconfig. We don't want state changes
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* or driver callbacks while this is in progress.
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local->in_reconfig = true;
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schedule_work(&local->restart_work);
362
EXPORT_SYMBOL(ieee80211_restart_hw);
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static void ieee80211_recalc_smps_work(struct work_struct *work)
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struct ieee80211_local *local =
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container_of(work, struct ieee80211_local, recalc_smps);
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mutex_lock(&local->iflist_mtx);
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ieee80211_recalc_smps(local);
371
mutex_unlock(&local->iflist_mtx);
375
static int ieee80211_ifa_changed(struct notifier_block *nb,
376
unsigned long data, void *arg)
378
struct in_ifaddr *ifa = arg;
379
struct ieee80211_local *local =
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container_of(nb, struct ieee80211_local,
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struct net_device *ndev = ifa->ifa_dev->dev;
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struct wireless_dev *wdev = ndev->ieee80211_ptr;
384
struct in_device *idev;
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struct ieee80211_sub_if_data *sdata;
386
struct ieee80211_bss_conf *bss_conf;
387
struct ieee80211_if_managed *ifmgd;
390
/* Make sure it's our interface that got changed */
394
if (wdev->wiphy != local->hw.wiphy)
397
sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
398
bss_conf = &sdata->vif.bss_conf;
400
/* ARP filtering is only supported in managed mode */
401
if (sdata->vif.type != NL80211_IFTYPE_STATION)
404
idev = __in_dev_get_rtnl(sdata->dev);
408
ifmgd = &sdata->u.mgd;
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mutex_lock(&ifmgd->mtx);
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/* Copy the addresses to the bss_conf list */
412
ifa = idev->ifa_list;
413
while (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN && ifa) {
414
bss_conf->arp_addr_list[c] = ifa->ifa_address;
419
/* If not all addresses fit the list, disable filtering */
421
sdata->arp_filter_state = false;
424
sdata->arp_filter_state = true;
426
bss_conf->arp_addr_cnt = c;
428
/* Configure driver only if associated (which also implies it is up) */
429
if (ifmgd->associated) {
430
bss_conf->arp_filter_enabled = sdata->arp_filter_state;
431
ieee80211_bss_info_change_notify(sdata,
432
BSS_CHANGED_ARP_FILTER);
435
mutex_unlock(&ifmgd->mtx);
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static int ieee80211_napi_poll(struct napi_struct *napi, int budget)
443
struct ieee80211_local *local =
444
container_of(napi, struct ieee80211_local, napi);
446
return local->ops->napi_poll(&local->hw, budget);
449
void ieee80211_napi_schedule(struct ieee80211_hw *hw)
451
struct ieee80211_local *local = hw_to_local(hw);
453
napi_schedule(&local->napi);
455
EXPORT_SYMBOL(ieee80211_napi_schedule);
457
void ieee80211_napi_complete(struct ieee80211_hw *hw)
459
struct ieee80211_local *local = hw_to_local(hw);
461
napi_complete(&local->napi);
463
EXPORT_SYMBOL(ieee80211_napi_complete);
465
/* There isn't a lot of sense in it, but you can transmit anything you like */
466
static const struct ieee80211_txrx_stypes
467
ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
468
[NL80211_IFTYPE_ADHOC] = {
470
.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
471
BIT(IEEE80211_STYPE_AUTH >> 4) |
472
BIT(IEEE80211_STYPE_DEAUTH >> 4),
474
[NL80211_IFTYPE_STATION] = {
476
.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
477
BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
479
[NL80211_IFTYPE_AP] = {
481
.rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
482
BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
483
BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
484
BIT(IEEE80211_STYPE_DISASSOC >> 4) |
485
BIT(IEEE80211_STYPE_AUTH >> 4) |
486
BIT(IEEE80211_STYPE_DEAUTH >> 4) |
487
BIT(IEEE80211_STYPE_ACTION >> 4),
489
[NL80211_IFTYPE_AP_VLAN] = {
492
.rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
493
BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
494
BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
495
BIT(IEEE80211_STYPE_DISASSOC >> 4) |
496
BIT(IEEE80211_STYPE_AUTH >> 4) |
497
BIT(IEEE80211_STYPE_DEAUTH >> 4) |
498
BIT(IEEE80211_STYPE_ACTION >> 4),
500
[NL80211_IFTYPE_P2P_CLIENT] = {
502
.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
503
BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
505
[NL80211_IFTYPE_P2P_GO] = {
507
.rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
508
BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
509
BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
510
BIT(IEEE80211_STYPE_DISASSOC >> 4) |
511
BIT(IEEE80211_STYPE_AUTH >> 4) |
512
BIT(IEEE80211_STYPE_DEAUTH >> 4) |
513
BIT(IEEE80211_STYPE_ACTION >> 4),
515
[NL80211_IFTYPE_MESH_POINT] = {
517
.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
518
BIT(IEEE80211_STYPE_AUTH >> 4) |
519
BIT(IEEE80211_STYPE_DEAUTH >> 4),
523
static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
524
.ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
525
IEEE80211_HT_AMPDU_PARM_DENSITY,
527
.cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
528
IEEE80211_HT_CAP_MAX_AMSDU |
529
IEEE80211_HT_CAP_SGI_40),
531
.rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
532
0xff, 0xff, 0xff, 0xff, 0xff, },
536
struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
537
const struct ieee80211_ops *ops)
539
struct ieee80211_local *local;
543
if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
546
/* Ensure 32-byte alignment of our private data and hw private data.
547
* We use the wiphy priv data for both our ieee80211_local and for
548
* the driver's private data
550
* In memory it'll be like this:
552
* +-------------------------+
554
* +-------------------------+
555
* | struct ieee80211_local |
556
* +-------------------------+
557
* | driver's private data |
558
* +-------------------------+
561
priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
563
wiphy = wiphy_new(&mac80211_config_ops, priv_size);
568
wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
570
wiphy->privid = mac80211_wiphy_privid;
572
wiphy->flags |= WIPHY_FLAG_NETNS_OK |
573
WIPHY_FLAG_4ADDR_AP |
574
WIPHY_FLAG_4ADDR_STATION |
575
WIPHY_FLAG_REPORTS_OBSS |
576
WIPHY_FLAG_OFFCHAN_TX;
578
if (ops->remain_on_channel)
579
wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
581
wiphy->features = NL80211_FEATURE_SK_TX_STATUS |
582
NL80211_FEATURE_HT_IBSS;
585
wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
587
wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
589
local = wiphy_priv(wiphy);
591
local->hw.wiphy = wiphy;
593
local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
598
BUG_ON(!ops->config);
599
BUG_ON(!ops->add_interface);
600
BUG_ON(!ops->remove_interface);
601
BUG_ON(!ops->configure_filter);
604
/* set up some defaults */
605
local->hw.queues = 1;
606
local->hw.max_rates = 1;
607
local->hw.max_report_rates = 0;
608
local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
609
local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
610
local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
611
local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
612
local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
613
local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
614
IEEE80211_RADIOTAP_MCS_HAVE_GI |
615
IEEE80211_RADIOTAP_MCS_HAVE_BW;
616
local->user_power_level = -1;
617
wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
619
INIT_LIST_HEAD(&local->interfaces);
620
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
622
__hw_addr_init(&local->mc_list);
625
mutex_init(&local->iflist_mtx);
626
mutex_init(&local->mtx);
628
mutex_init(&local->key_mtx);
629
spin_lock_init(&local->filter_lock);
630
spin_lock_init(&local->queue_stop_reason_lock);
633
* The rx_skb_queue is only accessed from tasklets,
634
* but other SKB queues are used from within IRQ
635
* context. Therefore, this one needs a different
636
* locking class so our direct, non-irq-safe use of
637
* the queue's lock doesn't throw lockdep warnings.
639
skb_queue_head_init_class(&local->rx_skb_queue,
640
&ieee80211_rx_skb_queue_class);
642
INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
644
INIT_WORK(&local->restart_work, ieee80211_restart_work);
646
INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
647
INIT_WORK(&local->recalc_smps, ieee80211_recalc_smps_work);
648
local->smps_mode = IEEE80211_SMPS_OFF;
650
INIT_WORK(&local->dynamic_ps_enable_work,
651
ieee80211_dynamic_ps_enable_work);
652
INIT_WORK(&local->dynamic_ps_disable_work,
653
ieee80211_dynamic_ps_disable_work);
654
setup_timer(&local->dynamic_ps_timer,
655
ieee80211_dynamic_ps_timer, (unsigned long) local);
657
INIT_WORK(&local->sched_scan_stopped_work,
658
ieee80211_sched_scan_stopped_work);
660
spin_lock_init(&local->ack_status_lock);
661
idr_init(&local->ack_status_frames);
662
/* preallocate at least one entry */
663
idr_pre_get(&local->ack_status_frames, GFP_KERNEL);
665
sta_info_init(local);
667
for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
668
skb_queue_head_init(&local->pending[i]);
669
atomic_set(&local->agg_queue_stop[i], 0);
671
tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
672
(unsigned long)local);
674
tasklet_init(&local->tasklet,
675
ieee80211_tasklet_handler,
676
(unsigned long) local);
678
skb_queue_head_init(&local->skb_queue);
679
skb_queue_head_init(&local->skb_queue_unreliable);
681
/* init dummy netdev for use w/ NAPI */
682
init_dummy_netdev(&local->napi_dev);
684
ieee80211_led_names(local);
686
ieee80211_roc_setup(local);
690
EXPORT_SYMBOL(ieee80211_alloc_hw);
692
int ieee80211_register_hw(struct ieee80211_hw *hw)
694
struct ieee80211_local *local = hw_to_local(hw);
696
enum ieee80211_band band;
697
int channels, max_bitrates;
698
bool supp_ht, supp_vht;
699
netdev_features_t feature_whitelist;
700
static const u32 cipher_suites[] = {
701
/* keep WEP first, it may be removed below */
702
WLAN_CIPHER_SUITE_WEP40,
703
WLAN_CIPHER_SUITE_WEP104,
704
WLAN_CIPHER_SUITE_TKIP,
705
WLAN_CIPHER_SUITE_CCMP,
707
/* keep last -- depends on hw flags! */
708
WLAN_CIPHER_SUITE_AES_CMAC
711
if (hw->flags & IEEE80211_HW_QUEUE_CONTROL &&
712
(local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
713
local->hw.offchannel_tx_hw_queue >= local->hw.queues))
717
if ((hw->wiphy->wowlan.flags || hw->wiphy->wowlan.n_patterns) &&
718
(!local->ops->suspend || !local->ops->resume))
722
if ((hw->flags & IEEE80211_HW_SCAN_WHILE_IDLE) && !local->ops->hw_scan)
725
/* Only HW csum features are currently compatible with mac80211 */
726
feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
728
if (WARN_ON(hw->netdev_features & ~feature_whitelist))
731
if (hw->max_report_rates == 0)
732
hw->max_report_rates = hw->max_rates;
735
* generic code guarantees at least one band,
736
* set this very early because much code assumes
737
* that hw.conf.channel is assigned
743
for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
744
struct ieee80211_supported_band *sband;
746
sband = local->hw.wiphy->bands[band];
749
if (!local->oper_channel) {
750
/* init channel we're on */
751
local->hw.conf.channel =
752
local->oper_channel = &sband->channels[0];
753
local->hw.conf.channel_type = NL80211_CHAN_NO_HT;
755
channels += sband->n_channels;
757
if (max_bitrates < sband->n_bitrates)
758
max_bitrates = sband->n_bitrates;
759
supp_ht = supp_ht || sband->ht_cap.ht_supported;
760
supp_vht = supp_vht || sband->vht_cap.vht_supported;
763
local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
764
sizeof(void *) * channels, GFP_KERNEL);
765
if (!local->int_scan_req)
768
for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
769
if (!local->hw.wiphy->bands[band])
771
local->int_scan_req->rates[band] = (u32) -1;
774
/* if low-level driver supports AP, we also support VLAN */
775
if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
776
hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
777
hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
780
/* mac80211 always supports monitor */
781
hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
782
hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
785
* mac80211 doesn't support more than 1 channel, and also not more
786
* than one IBSS interface
788
for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
789
const struct ieee80211_iface_combination *c;
792
c = &hw->wiphy->iface_combinations[i];
794
if (c->num_different_channels > 1)
797
for (j = 0; j < c->n_limits; j++)
798
if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
799
c->limits[j].max > 1)
803
#ifndef CONFIG_MAC80211_MESH
804
/* mesh depends on Kconfig, but drivers should set it if they want */
805
local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
808
/* if the underlying driver supports mesh, mac80211 will (at least)
809
* provide routing of mesh authentication frames to userspace */
810
if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
811
local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
813
/* mac80211 supports control port protocol changing */
814
local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
816
if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
817
local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
818
else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
819
local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
821
WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
822
&& (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
823
"U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
826
* Calculate scan IE length -- we need this to alloc
827
* memory and to subtract from the driver limit. It
828
* includes the DS Params, (extended) supported rates, and HT
829
* information -- SSID is the driver's responsibility.
831
local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
834
local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
837
local->scan_ies_len +=
838
2 + sizeof(struct ieee80211_vht_capabilities);
840
if (!local->ops->hw_scan) {
841
/* For hw_scan, driver needs to set these up. */
842
local->hw.wiphy->max_scan_ssids = 4;
843
local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
847
* If the driver supports any scan IEs, then assume the
848
* limit includes the IEs mac80211 will add, otherwise
849
* leave it at zero and let the driver sort it out; we
850
* still pass our IEs to the driver but userspace will
851
* not be allowed to in that case.
853
if (local->hw.wiphy->max_scan_ie_len)
854
local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
856
/* Set up cipher suites unless driver already did */
857
if (!local->hw.wiphy->cipher_suites) {
858
local->hw.wiphy->cipher_suites = cipher_suites;
859
local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
860
if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE))
861
local->hw.wiphy->n_cipher_suites--;
863
if (IS_ERR(local->wep_tx_tfm) || IS_ERR(local->wep_rx_tfm)) {
864
if (local->hw.wiphy->cipher_suites == cipher_suites) {
865
local->hw.wiphy->cipher_suites += 2;
866
local->hw.wiphy->n_cipher_suites -= 2;
874
local->hw.wiphy->cipher_suites,
875
sizeof(u32) * local->hw.wiphy->n_cipher_suites,
879
for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
880
u32 suite = local->hw.wiphy->cipher_suites[r];
881
if (suite == WLAN_CIPHER_SUITE_WEP40 ||
882
suite == WLAN_CIPHER_SUITE_WEP104)
886
local->hw.wiphy->cipher_suites = suites;
887
local->hw.wiphy->n_cipher_suites = w;
888
local->wiphy_ciphers_allocated = true;
892
if (!local->ops->remain_on_channel)
893
local->hw.wiphy->max_remain_on_channel_duration = 5000;
895
if (local->ops->sched_scan_start)
896
local->hw.wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
898
/* mac80211 based drivers don't support internal TDLS setup */
899
if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
900
local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
902
result = wiphy_register(local->hw.wiphy);
904
goto fail_wiphy_register;
907
* We use the number of queues for feature tests (QoS, HT) internally
908
* so restrict them appropriately.
910
if (hw->queues > IEEE80211_MAX_QUEUES)
911
hw->queues = IEEE80211_MAX_QUEUES;
914
alloc_ordered_workqueue(wiphy_name(local->hw.wiphy), 0);
915
if (!local->workqueue) {
921
* The hardware needs headroom for sending the frame,
922
* and we need some headroom for passing the frame to monitor
923
* interfaces, but never both at the same time.
925
local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
926
IEEE80211_TX_STATUS_HEADROOM);
928
debugfs_hw_add(local);
931
* if the driver doesn't specify a max listen interval we
932
* use 5 which should be a safe default
934
if (local->hw.max_listen_interval == 0)
935
local->hw.max_listen_interval = 5;
937
local->hw.conf.listen_interval = local->hw.max_listen_interval;
939
local->dynamic_ps_forced_timeout = -1;
941
result = ieee80211_wep_init(local);
943
wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
946
ieee80211_led_init(local);
950
result = ieee80211_init_rate_ctrl_alg(local,
951
hw->rate_control_algorithm);
953
wiphy_debug(local->hw.wiphy,
954
"Failed to initialize rate control algorithm\n");
958
/* add one default STA interface if supported */
959
if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {
960
result = ieee80211_if_add(local, "wlan%d", NULL,
961
NL80211_IFTYPE_STATION, NULL);
963
wiphy_warn(local->hw.wiphy,
964
"Failed to add default virtual iface\n");
969
local->network_latency_notifier.notifier_call =
970
ieee80211_max_network_latency;
971
result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
972
&local->network_latency_notifier);
979
local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
980
result = register_inetaddr_notifier(&local->ifa_notifier);
985
netif_napi_add(&local->napi_dev, &local->napi, ieee80211_napi_poll,
986
local->hw.napi_weight);
992
pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
993
&local->network_latency_notifier);
997
ieee80211_led_exit(local);
998
ieee80211_remove_interfaces(local);
1001
ieee80211_wep_free(local);
1002
sta_info_stop(local);
1003
destroy_workqueue(local->workqueue);
1005
wiphy_unregister(local->hw.wiphy);
1006
fail_wiphy_register:
1007
if (local->wiphy_ciphers_allocated)
1008
kfree(local->hw.wiphy->cipher_suites);
1009
kfree(local->int_scan_req);
1012
EXPORT_SYMBOL(ieee80211_register_hw);
1014
void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1016
struct ieee80211_local *local = hw_to_local(hw);
1018
tasklet_kill(&local->tx_pending_tasklet);
1019
tasklet_kill(&local->tasklet);
1021
pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1022
&local->network_latency_notifier);
1024
unregister_inetaddr_notifier(&local->ifa_notifier);
1030
* At this point, interface list manipulations are fine
1031
* because the driver cannot be handing us frames any
1032
* more and the tasklet is killed.
1034
ieee80211_remove_interfaces(local);
1038
cancel_work_sync(&local->restart_work);
1039
cancel_work_sync(&local->reconfig_filter);
1041
ieee80211_clear_tx_pending(local);
1042
rate_control_deinitialize(local);
1044
if (skb_queue_len(&local->skb_queue) ||
1045
skb_queue_len(&local->skb_queue_unreliable))
1046
wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1047
skb_queue_purge(&local->skb_queue);
1048
skb_queue_purge(&local->skb_queue_unreliable);
1049
skb_queue_purge(&local->rx_skb_queue);
1051
destroy_workqueue(local->workqueue);
1052
wiphy_unregister(local->hw.wiphy);
1053
sta_info_stop(local);
1054
ieee80211_wep_free(local);
1055
ieee80211_led_exit(local);
1056
kfree(local->int_scan_req);
1058
EXPORT_SYMBOL(ieee80211_unregister_hw);
1060
static int ieee80211_free_ack_frame(int id, void *p, void *data)
1062
WARN_ONCE(1, "Have pending ack frames!\n");
1067
void ieee80211_free_hw(struct ieee80211_hw *hw)
1069
struct ieee80211_local *local = hw_to_local(hw);
1071
mutex_destroy(&local->iflist_mtx);
1072
mutex_destroy(&local->mtx);
1074
if (local->wiphy_ciphers_allocated)
1075
kfree(local->hw.wiphy->cipher_suites);
1077
idr_for_each(&local->ack_status_frames,
1078
ieee80211_free_ack_frame, NULL);
1079
idr_destroy(&local->ack_status_frames);
1081
wiphy_free(local->hw.wiphy);
1083
EXPORT_SYMBOL(ieee80211_free_hw);
1085
static int __init ieee80211_init(void)
1087
struct sk_buff *skb;
1090
BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1091
BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1092
IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1094
ret = rc80211_minstrel_init();
1098
ret = rc80211_minstrel_ht_init();
1102
ret = rc80211_pid_init();
1106
ret = ieee80211_iface_init();
1114
rc80211_minstrel_ht_exit();
1116
rc80211_minstrel_exit();
1121
static void __exit ieee80211_exit(void)
1124
rc80211_minstrel_ht_exit();
1125
rc80211_minstrel_exit();
1127
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,37))
1128
flush_scheduled_work();
1134
ieee80211_iface_exit();
1140
subsys_initcall(ieee80211_init);
1141
module_exit(ieee80211_exit);
1143
MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1144
MODULE_LICENSE("GPL");