1039 lines
28 KiB
C
1039 lines
28 KiB
C
/*
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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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*
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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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*/
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#include <net/mac80211.h>
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#include <net/ieee80211_radiotap.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/wireless.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_params.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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#include "rate.h"
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#include "mesh.h"
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#include "wep.h"
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#include "wme.h"
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#include "aes_ccm.h"
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#include "led.h"
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#include "cfg.h"
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#include "debugfs.h"
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#include "debugfs_netdev.h"
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/*
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* For seeing transmitted packets on monitor interfaces
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* we have a radiotap header too.
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*/
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struct ieee80211_tx_status_rtap_hdr {
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struct ieee80211_radiotap_header hdr;
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u8 rate;
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u8 padding_for_rate;
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__le16 tx_flags;
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u8 data_retries;
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} __attribute__ ((packed));
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void ieee80211_configure_filter(struct ieee80211_local *local)
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{
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u64 mc;
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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 || local->scanning)
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new_flags |= FIF_BCN_PRBRESP_PROMISC;
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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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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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/* be a bit nasty */
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new_flags |= (1<<31);
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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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}
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static void ieee80211_reconfig_filter(struct work_struct *work)
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{
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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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}
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int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
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{
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struct ieee80211_channel *chan, *scan_chan;
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int ret = 0;
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int power;
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enum nl80211_channel_type channel_type;
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might_sleep();
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scan_chan = local->scan_channel;
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if (scan_chan) {
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chan = scan_chan;
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channel_type = NL80211_CHAN_NO_HT;
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} else {
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chan = local->oper_channel;
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channel_type = local->oper_channel_type;
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}
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if (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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}
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if (scan_chan)
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power = chan->max_power;
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else
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power = local->power_constr_level ?
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(chan->max_power - local->power_constr_level) :
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chan->max_power;
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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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}
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if (changed && local->open_count) {
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ret = drv_config(local, changed);
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/*
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* Goal:
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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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*
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* Current status:
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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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* is enabled
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*
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* FIXME: integrate rfkill with mac80211 and then add this
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* WARN_ON() back
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*
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*/
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/* WARN_ON(ret); */
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}
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return ret;
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}
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void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
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u32 changed)
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{
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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 (!changed)
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return;
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if (sdata->vif.type == NL80211_IFTYPE_STATION) {
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/*
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* While not associated, claim a BSSID of all-zeroes
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* so that drivers don't do any weird things with the
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* BSSID at that time.
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*/
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if (sdata->vif.bss_conf.assoc)
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sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
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else
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sdata->vif.bss_conf.bssid = zero;
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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->dev->dev_addr;
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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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} else {
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WARN_ON(1);
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return;
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}
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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_MESH_POINT:
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break;
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default:
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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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return;
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break;
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}
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if (changed & BSS_CHANGED_BEACON_ENABLED) {
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if (local->quiescing || !netif_running(sdata->dev) ||
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test_bit(SCAN_SW_SCANNING, &local->scanning)) {
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sdata->vif.bss_conf.enable_beacon = false;
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} else {
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/*
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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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*/
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switch (sdata->vif.type) {
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case NL80211_IFTYPE_AP:
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sdata->vif.bss_conf.enable_beacon =
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!!rcu_dereference(sdata->u.ap.beacon);
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break;
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case NL80211_IFTYPE_ADHOC:
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sdata->vif.bss_conf.enable_beacon =
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!!rcu_dereference(sdata->u.ibss.presp);
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break;
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case NL80211_IFTYPE_MESH_POINT:
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sdata->vif.bss_conf.enable_beacon = true;
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break;
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default:
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/* not reached */
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WARN_ON(1);
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break;
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}
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}
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}
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drv_bss_info_changed(local, &sdata->vif,
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&sdata->vif.bss_conf, changed);
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}
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u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
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{
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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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}
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void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
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struct sk_buff *skb)
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{
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struct ieee80211_local *local = hw_to_local(hw);
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struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
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int tmp;
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skb->pkt_type = IEEE80211_TX_STATUS_MSG;
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skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ?
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&local->skb_queue : &local->skb_queue_unreliable, skb);
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tmp = skb_queue_len(&local->skb_queue) +
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skb_queue_len(&local->skb_queue_unreliable);
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while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
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(skb = skb_dequeue(&local->skb_queue_unreliable))) {
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dev_kfree_skb_irq(skb);
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tmp--;
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I802_DEBUG_INC(local->tx_status_drop);
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}
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tasklet_schedule(&local->tasklet);
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}
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EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
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static void ieee80211_tasklet_handler(unsigned long data)
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{
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struct ieee80211_local *local = (struct ieee80211_local *) data;
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struct sk_buff *skb;
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struct ieee80211_ra_tid *ra_tid;
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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
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* netstack. */
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skb->pkt_type = 0;
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ieee80211_rx(local_to_hw(local), skb);
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break;
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case IEEE80211_TX_STATUS_MSG:
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skb->pkt_type = 0;
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ieee80211_tx_status(local_to_hw(local), skb);
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break;
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case IEEE80211_DELBA_MSG:
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ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
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ieee80211_stop_tx_ba_cb(ra_tid->vif, ra_tid->ra,
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ra_tid->tid);
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dev_kfree_skb(skb);
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break;
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case IEEE80211_ADDBA_MSG:
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ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
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ieee80211_start_tx_ba_cb(ra_tid->vif, ra_tid->ra,
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ra_tid->tid);
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dev_kfree_skb(skb);
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break ;
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default:
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WARN(1, "mac80211: Packet is of unknown type %d\n",
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skb->pkt_type);
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dev_kfree_skb(skb);
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break;
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}
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}
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}
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static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
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struct sta_info *sta,
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struct sk_buff *skb)
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{
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struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
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/*
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* XXX: This is temporary!
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*
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* The problem here is that when we get here, the driver will
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* quite likely have pretty much overwritten info->control by
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* using info->driver_data or info->rate_driver_data. Thus,
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* when passing out the frame to the driver again, we would be
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* passing completely bogus data since the driver would then
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* expect a properly filled info->control. In mac80211 itself
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* the same problem occurs, since we need info->control.vif
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* internally.
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*
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* To fix this, we should send the frame through TX processing
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* again. However, it's not that simple, since the frame will
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* have been software-encrypted (if applicable) already, and
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* encrypting it again doesn't do much good. So to properly do
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* that, we not only have to skip the actual 'raw' encryption
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* (key selection etc. still has to be done!) but also the
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* sequence number assignment since that impacts the crypto
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* encapsulation, of course.
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*
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* Hence, for now, fix the bug by just dropping the frame.
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*/
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goto drop;
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sta->tx_filtered_count++;
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/*
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* Clear the TX filter mask for this STA when sending the next
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* packet. If the STA went to power save mode, this will happen
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* when it wakes up for the next time.
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*/
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set_sta_flags(sta, WLAN_STA_CLEAR_PS_FILT);
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/*
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* This code races in the following way:
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*
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* (1) STA sends frame indicating it will go to sleep and does so
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* (2) hardware/firmware adds STA to filter list, passes frame up
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* (3) hardware/firmware processes TX fifo and suppresses a frame
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* (4) we get TX status before having processed the frame and
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* knowing that the STA has gone to sleep.
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*
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* This is actually quite unlikely even when both those events are
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* processed from interrupts coming in quickly after one another or
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* even at the same time because we queue both TX status events and
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* RX frames to be processed by a tasklet and process them in the
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* same order that they were received or TX status last. Hence, there
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* is no race as long as the frame RX is processed before the next TX
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* status, which drivers can ensure, see below.
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*
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* Note that this can only happen if the hardware or firmware can
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* actually add STAs to the filter list, if this is done by the
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* driver in response to set_tim() (which will only reduce the race
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* this whole filtering tries to solve, not completely solve it)
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* this situation cannot happen.
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*
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* To completely solve this race drivers need to make sure that they
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* (a) don't mix the irq-safe/not irq-safe TX status/RX processing
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* functions and
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* (b) always process RX events before TX status events if ordering
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* can be unknown, for example with different interrupt status
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* bits.
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*/
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if (test_sta_flags(sta, WLAN_STA_PS_STA) &&
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skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) {
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skb_queue_tail(&sta->tx_filtered, skb);
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return;
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}
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if (!test_sta_flags(sta, WLAN_STA_PS_STA) &&
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!(info->flags & IEEE80211_TX_INTFL_RETRIED)) {
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/* Software retry the packet once */
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info->flags |= IEEE80211_TX_INTFL_RETRIED;
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ieee80211_add_pending_skb(local, skb);
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return;
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}
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drop:
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#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
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if (net_ratelimit())
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printk(KERN_DEBUG "%s: dropped TX filtered frame, "
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"queue_len=%d PS=%d @%lu\n",
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wiphy_name(local->hw.wiphy),
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skb_queue_len(&sta->tx_filtered),
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!!test_sta_flags(sta, WLAN_STA_PS_STA), jiffies);
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#endif
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dev_kfree_skb(skb);
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}
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void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
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{
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struct sk_buff *skb2;
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struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
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struct ieee80211_local *local = hw_to_local(hw);
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struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
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u16 frag, type;
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__le16 fc;
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struct ieee80211_supported_band *sband;
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struct ieee80211_tx_status_rtap_hdr *rthdr;
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struct ieee80211_sub_if_data *sdata;
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struct net_device *prev_dev = NULL;
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struct sta_info *sta;
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int retry_count = -1, i;
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for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
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/* the HW cannot have attempted that rate */
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if (i >= hw->max_rates) {
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info->status.rates[i].idx = -1;
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info->status.rates[i].count = 0;
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}
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retry_count += info->status.rates[i].count;
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}
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if (retry_count < 0)
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retry_count = 0;
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|
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rcu_read_lock();
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|
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sband = local->hw.wiphy->bands[info->band];
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|
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sta = sta_info_get(local, hdr->addr1);
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|
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if (sta) {
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if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
|
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test_sta_flags(sta, WLAN_STA_PS_STA)) {
|
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/*
|
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* The STA is in power save mode, so assume
|
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* that this TX packet failed because of that.
|
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*/
|
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ieee80211_handle_filtered_frame(local, sta, skb);
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rcu_read_unlock();
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return;
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}
|
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|
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fc = hdr->frame_control;
|
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|
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if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) &&
|
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(ieee80211_is_data_qos(fc))) {
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u16 tid, ssn;
|
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u8 *qc;
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|
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qc = ieee80211_get_qos_ctl(hdr);
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tid = qc[0] & 0xf;
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ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10)
|
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& IEEE80211_SCTL_SEQ);
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ieee80211_send_bar(sta->sdata, hdr->addr1,
|
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tid, ssn);
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}
|
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|
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if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
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ieee80211_handle_filtered_frame(local, sta, skb);
|
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rcu_read_unlock();
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return;
|
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} else {
|
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if (!(info->flags & IEEE80211_TX_STAT_ACK))
|
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sta->tx_retry_failed++;
|
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sta->tx_retry_count += retry_count;
|
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}
|
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|
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rate_control_tx_status(local, sband, sta, skb);
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if (ieee80211_vif_is_mesh(&sta->sdata->vif))
|
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ieee80211s_update_metric(local, sta, skb);
|
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}
|
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|
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rcu_read_unlock();
|
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|
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ieee80211_led_tx(local, 0);
|
|
|
|
/* SNMP counters
|
|
* Fragments are passed to low-level drivers as separate skbs, so these
|
|
* are actually fragments, not frames. Update frame counters only for
|
|
* the first fragment of the frame. */
|
|
|
|
frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
|
|
type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
|
|
|
|
if (info->flags & IEEE80211_TX_STAT_ACK) {
|
|
if (frag == 0) {
|
|
local->dot11TransmittedFrameCount++;
|
|
if (is_multicast_ether_addr(hdr->addr1))
|
|
local->dot11MulticastTransmittedFrameCount++;
|
|
if (retry_count > 0)
|
|
local->dot11RetryCount++;
|
|
if (retry_count > 1)
|
|
local->dot11MultipleRetryCount++;
|
|
}
|
|
|
|
/* This counter shall be incremented for an acknowledged MPDU
|
|
* with an individual address in the address 1 field or an MPDU
|
|
* with a multicast address in the address 1 field of type Data
|
|
* or Management. */
|
|
if (!is_multicast_ether_addr(hdr->addr1) ||
|
|
type == IEEE80211_FTYPE_DATA ||
|
|
type == IEEE80211_FTYPE_MGMT)
|
|
local->dot11TransmittedFragmentCount++;
|
|
} else {
|
|
if (frag == 0)
|
|
local->dot11FailedCount++;
|
|
}
|
|
|
|
/* this was a transmitted frame, but now we want to reuse it */
|
|
skb_orphan(skb);
|
|
|
|
/*
|
|
* This is a bit racy but we can avoid a lot of work
|
|
* with this test...
|
|
*/
|
|
if (!local->monitors && !local->cooked_mntrs) {
|
|
dev_kfree_skb(skb);
|
|
return;
|
|
}
|
|
|
|
/* send frame to monitor interfaces now */
|
|
|
|
if (skb_headroom(skb) < sizeof(*rthdr)) {
|
|
printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
|
|
dev_kfree_skb(skb);
|
|
return;
|
|
}
|
|
|
|
rthdr = (struct ieee80211_tx_status_rtap_hdr *)
|
|
skb_push(skb, sizeof(*rthdr));
|
|
|
|
memset(rthdr, 0, sizeof(*rthdr));
|
|
rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
|
|
rthdr->hdr.it_present =
|
|
cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
|
|
(1 << IEEE80211_RADIOTAP_DATA_RETRIES) |
|
|
(1 << IEEE80211_RADIOTAP_RATE));
|
|
|
|
if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
|
|
!is_multicast_ether_addr(hdr->addr1))
|
|
rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
|
|
|
|
/*
|
|
* XXX: Once radiotap gets the bitmap reset thing the vendor
|
|
* extensions proposal contains, we can actually report
|
|
* the whole set of tries we did.
|
|
*/
|
|
if ((info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) ||
|
|
(info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT))
|
|
rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
|
|
else if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS)
|
|
rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
|
|
if (info->status.rates[0].idx >= 0 &&
|
|
!(info->status.rates[0].flags & IEEE80211_TX_RC_MCS))
|
|
rthdr->rate = sband->bitrates[
|
|
info->status.rates[0].idx].bitrate / 5;
|
|
|
|
/* for now report the total retry_count */
|
|
rthdr->data_retries = retry_count;
|
|
|
|
/* XXX: is this sufficient for BPF? */
|
|
skb_set_mac_header(skb, 0);
|
|
skb->ip_summed = CHECKSUM_UNNECESSARY;
|
|
skb->pkt_type = PACKET_OTHERHOST;
|
|
skb->protocol = htons(ETH_P_802_2);
|
|
memset(skb->cb, 0, sizeof(skb->cb));
|
|
|
|
rcu_read_lock();
|
|
list_for_each_entry_rcu(sdata, &local->interfaces, list) {
|
|
if (sdata->vif.type == NL80211_IFTYPE_MONITOR) {
|
|
if (!netif_running(sdata->dev))
|
|
continue;
|
|
|
|
if ((sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) &&
|
|
!(info->flags & IEEE80211_TX_CTL_INJECTED) &&
|
|
(type == IEEE80211_FTYPE_DATA))
|
|
continue;
|
|
|
|
if (prev_dev) {
|
|
skb2 = skb_clone(skb, GFP_ATOMIC);
|
|
if (skb2) {
|
|
skb2->dev = prev_dev;
|
|
netif_rx(skb2);
|
|
}
|
|
}
|
|
|
|
prev_dev = sdata->dev;
|
|
}
|
|
}
|
|
if (prev_dev) {
|
|
skb->dev = prev_dev;
|
|
netif_rx(skb);
|
|
skb = NULL;
|
|
}
|
|
rcu_read_unlock();
|
|
dev_kfree_skb(skb);
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_tx_status);
|
|
|
|
static void ieee80211_restart_work(struct work_struct *work)
|
|
{
|
|
struct ieee80211_local *local =
|
|
container_of(work, struct ieee80211_local, restart_work);
|
|
|
|
rtnl_lock();
|
|
ieee80211_reconfig(local);
|
|
rtnl_unlock();
|
|
}
|
|
|
|
void ieee80211_restart_hw(struct ieee80211_hw *hw)
|
|
{
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
|
|
|
/* use this reason, __ieee80211_resume will unblock it */
|
|
ieee80211_stop_queues_by_reason(hw,
|
|
IEEE80211_QUEUE_STOP_REASON_SUSPEND);
|
|
|
|
schedule_work(&local->restart_work);
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_restart_hw);
|
|
|
|
struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
|
|
const struct ieee80211_ops *ops)
|
|
{
|
|
struct ieee80211_local *local;
|
|
int priv_size, i;
|
|
struct wiphy *wiphy;
|
|
|
|
/* Ensure 32-byte alignment of our private data and hw private data.
|
|
* We use the wiphy priv data for both our ieee80211_local and for
|
|
* the driver's private data
|
|
*
|
|
* In memory it'll be like this:
|
|
*
|
|
* +-------------------------+
|
|
* | struct wiphy |
|
|
* +-------------------------+
|
|
* | struct ieee80211_local |
|
|
* +-------------------------+
|
|
* | driver's private data |
|
|
* +-------------------------+
|
|
*
|
|
*/
|
|
priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
|
|
|
|
wiphy = wiphy_new(&mac80211_config_ops, priv_size);
|
|
|
|
if (!wiphy)
|
|
return NULL;
|
|
|
|
wiphy->netnsok = true;
|
|
wiphy->privid = mac80211_wiphy_privid;
|
|
|
|
/* Yes, putting cfg80211_bss into ieee80211_bss is a hack */
|
|
wiphy->bss_priv_size = sizeof(struct ieee80211_bss) -
|
|
sizeof(struct cfg80211_bss);
|
|
|
|
local = wiphy_priv(wiphy);
|
|
|
|
local->hw.wiphy = wiphy;
|
|
|
|
local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
|
|
|
|
BUG_ON(!ops->tx);
|
|
BUG_ON(!ops->start);
|
|
BUG_ON(!ops->stop);
|
|
BUG_ON(!ops->config);
|
|
BUG_ON(!ops->add_interface);
|
|
BUG_ON(!ops->remove_interface);
|
|
BUG_ON(!ops->configure_filter);
|
|
local->ops = ops;
|
|
|
|
/* set up some defaults */
|
|
local->hw.queues = 1;
|
|
local->hw.max_rates = 1;
|
|
local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
|
|
local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
|
|
local->user_power_level = -1;
|
|
|
|
INIT_LIST_HEAD(&local->interfaces);
|
|
mutex_init(&local->iflist_mtx);
|
|
mutex_init(&local->scan_mtx);
|
|
|
|
spin_lock_init(&local->key_lock);
|
|
spin_lock_init(&local->filter_lock);
|
|
spin_lock_init(&local->queue_stop_reason_lock);
|
|
|
|
INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
|
|
|
|
INIT_WORK(&local->restart_work, ieee80211_restart_work);
|
|
|
|
INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
|
|
|
|
INIT_WORK(&local->dynamic_ps_enable_work,
|
|
ieee80211_dynamic_ps_enable_work);
|
|
INIT_WORK(&local->dynamic_ps_disable_work,
|
|
ieee80211_dynamic_ps_disable_work);
|
|
setup_timer(&local->dynamic_ps_timer,
|
|
ieee80211_dynamic_ps_timer, (unsigned long) local);
|
|
|
|
sta_info_init(local);
|
|
|
|
for (i = 0; i < IEEE80211_MAX_QUEUES; i++)
|
|
skb_queue_head_init(&local->pending[i]);
|
|
tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
|
|
(unsigned long)local);
|
|
|
|
tasklet_init(&local->tasklet,
|
|
ieee80211_tasklet_handler,
|
|
(unsigned long) local);
|
|
|
|
skb_queue_head_init(&local->skb_queue);
|
|
skb_queue_head_init(&local->skb_queue_unreliable);
|
|
|
|
spin_lock_init(&local->ampdu_lock);
|
|
|
|
return local_to_hw(local);
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_alloc_hw);
|
|
|
|
int ieee80211_register_hw(struct ieee80211_hw *hw)
|
|
{
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
|
int result;
|
|
enum ieee80211_band band;
|
|
int channels, i, j, max_bitrates;
|
|
bool supp_ht;
|
|
static const u32 cipher_suites[] = {
|
|
WLAN_CIPHER_SUITE_WEP40,
|
|
WLAN_CIPHER_SUITE_WEP104,
|
|
WLAN_CIPHER_SUITE_TKIP,
|
|
WLAN_CIPHER_SUITE_CCMP,
|
|
|
|
/* keep last -- depends on hw flags! */
|
|
WLAN_CIPHER_SUITE_AES_CMAC
|
|
};
|
|
|
|
/*
|
|
* generic code guarantees at least one band,
|
|
* set this very early because much code assumes
|
|
* that hw.conf.channel is assigned
|
|
*/
|
|
channels = 0;
|
|
max_bitrates = 0;
|
|
supp_ht = false;
|
|
for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
|
|
struct ieee80211_supported_band *sband;
|
|
|
|
sband = local->hw.wiphy->bands[band];
|
|
if (!sband)
|
|
continue;
|
|
if (!local->oper_channel) {
|
|
/* init channel we're on */
|
|
local->hw.conf.channel =
|
|
local->oper_channel = &sband->channels[0];
|
|
local->hw.conf.channel_type = NL80211_CHAN_NO_HT;
|
|
}
|
|
channels += sband->n_channels;
|
|
|
|
if (max_bitrates < sband->n_bitrates)
|
|
max_bitrates = sband->n_bitrates;
|
|
supp_ht = supp_ht || sband->ht_cap.ht_supported;
|
|
}
|
|
|
|
local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
|
|
sizeof(void *) * channels, GFP_KERNEL);
|
|
if (!local->int_scan_req)
|
|
return -ENOMEM;
|
|
|
|
/* if low-level driver supports AP, we also support VLAN */
|
|
if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP))
|
|
local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
|
|
|
|
/* mac80211 always supports monitor */
|
|
local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
|
|
|
|
if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
|
|
local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
|
|
else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
|
|
local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
|
|
|
|
/*
|
|
* Calculate scan IE length -- we need this to alloc
|
|
* memory and to subtract from the driver limit. It
|
|
* includes the (extended) supported rates and HT
|
|
* information -- SSID is the driver's responsibility.
|
|
*/
|
|
local->scan_ies_len = 4 + max_bitrates; /* (ext) supp rates */
|
|
if (supp_ht)
|
|
local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
|
|
|
|
if (!local->ops->hw_scan) {
|
|
/* For hw_scan, driver needs to set these up. */
|
|
local->hw.wiphy->max_scan_ssids = 4;
|
|
local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
|
|
}
|
|
|
|
/*
|
|
* If the driver supports any scan IEs, then assume the
|
|
* limit includes the IEs mac80211 will add, otherwise
|
|
* leave it at zero and let the driver sort it out; we
|
|
* still pass our IEs to the driver but userspace will
|
|
* not be allowed to in that case.
|
|
*/
|
|
if (local->hw.wiphy->max_scan_ie_len)
|
|
local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
|
|
|
|
local->hw.wiphy->cipher_suites = cipher_suites;
|
|
local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
|
|
if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE))
|
|
local->hw.wiphy->n_cipher_suites--;
|
|
|
|
result = wiphy_register(local->hw.wiphy);
|
|
if (result < 0)
|
|
goto fail_wiphy_register;
|
|
|
|
/*
|
|
* We use the number of queues for feature tests (QoS, HT) internally
|
|
* so restrict them appropriately.
|
|
*/
|
|
if (hw->queues > IEEE80211_MAX_QUEUES)
|
|
hw->queues = IEEE80211_MAX_QUEUES;
|
|
|
|
local->workqueue =
|
|
create_singlethread_workqueue(wiphy_name(local->hw.wiphy));
|
|
if (!local->workqueue) {
|
|
result = -ENOMEM;
|
|
goto fail_workqueue;
|
|
}
|
|
|
|
/*
|
|
* The hardware needs headroom for sending the frame,
|
|
* and we need some headroom for passing the frame to monitor
|
|
* interfaces, but never both at the same time.
|
|
*/
|
|
local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
|
|
sizeof(struct ieee80211_tx_status_rtap_hdr));
|
|
|
|
debugfs_hw_add(local);
|
|
|
|
if (local->hw.max_listen_interval == 0)
|
|
local->hw.max_listen_interval = 1;
|
|
|
|
local->hw.conf.listen_interval = local->hw.max_listen_interval;
|
|
|
|
result = sta_info_start(local);
|
|
if (result < 0)
|
|
goto fail_sta_info;
|
|
|
|
result = ieee80211_wep_init(local);
|
|
if (result < 0) {
|
|
printk(KERN_DEBUG "%s: Failed to initialize wep: %d\n",
|
|
wiphy_name(local->hw.wiphy), result);
|
|
goto fail_wep;
|
|
}
|
|
|
|
rtnl_lock();
|
|
|
|
result = ieee80211_init_rate_ctrl_alg(local,
|
|
hw->rate_control_algorithm);
|
|
if (result < 0) {
|
|
printk(KERN_DEBUG "%s: Failed to initialize rate control "
|
|
"algorithm\n", wiphy_name(local->hw.wiphy));
|
|
goto fail_rate;
|
|
}
|
|
|
|
/* add one default STA interface if supported */
|
|
if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {
|
|
result = ieee80211_if_add(local, "wlan%d", NULL,
|
|
NL80211_IFTYPE_STATION, NULL);
|
|
if (result)
|
|
printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
|
|
wiphy_name(local->hw.wiphy));
|
|
}
|
|
|
|
rtnl_unlock();
|
|
|
|
ieee80211_led_init(local);
|
|
|
|
/* alloc internal scan request */
|
|
i = 0;
|
|
local->int_scan_req->ssids = &local->scan_ssid;
|
|
local->int_scan_req->n_ssids = 1;
|
|
for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
|
|
if (!hw->wiphy->bands[band])
|
|
continue;
|
|
for (j = 0; j < hw->wiphy->bands[band]->n_channels; j++) {
|
|
local->int_scan_req->channels[i] =
|
|
&hw->wiphy->bands[band]->channels[j];
|
|
i++;
|
|
}
|
|
}
|
|
local->int_scan_req->n_channels = i;
|
|
|
|
local->network_latency_notifier.notifier_call =
|
|
ieee80211_max_network_latency;
|
|
result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
|
|
&local->network_latency_notifier);
|
|
|
|
if (result) {
|
|
rtnl_lock();
|
|
goto fail_pm_qos;
|
|
}
|
|
|
|
return 0;
|
|
|
|
fail_pm_qos:
|
|
ieee80211_led_exit(local);
|
|
ieee80211_remove_interfaces(local);
|
|
fail_rate:
|
|
rtnl_unlock();
|
|
ieee80211_wep_free(local);
|
|
fail_wep:
|
|
sta_info_stop(local);
|
|
fail_sta_info:
|
|
destroy_workqueue(local->workqueue);
|
|
fail_workqueue:
|
|
wiphy_unregister(local->hw.wiphy);
|
|
fail_wiphy_register:
|
|
kfree(local->int_scan_req);
|
|
return result;
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_register_hw);
|
|
|
|
void ieee80211_unregister_hw(struct ieee80211_hw *hw)
|
|
{
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
|
|
|
tasklet_kill(&local->tx_pending_tasklet);
|
|
tasklet_kill(&local->tasklet);
|
|
|
|
pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
|
|
&local->network_latency_notifier);
|
|
|
|
rtnl_lock();
|
|
|
|
/*
|
|
* At this point, interface list manipulations are fine
|
|
* because the driver cannot be handing us frames any
|
|
* more and the tasklet is killed.
|
|
*/
|
|
ieee80211_remove_interfaces(local);
|
|
|
|
rtnl_unlock();
|
|
|
|
cancel_work_sync(&local->reconfig_filter);
|
|
|
|
ieee80211_clear_tx_pending(local);
|
|
sta_info_stop(local);
|
|
rate_control_deinitialize(local);
|
|
|
|
if (skb_queue_len(&local->skb_queue)
|
|
|| skb_queue_len(&local->skb_queue_unreliable))
|
|
printk(KERN_WARNING "%s: skb_queue not empty\n",
|
|
wiphy_name(local->hw.wiphy));
|
|
skb_queue_purge(&local->skb_queue);
|
|
skb_queue_purge(&local->skb_queue_unreliable);
|
|
|
|
destroy_workqueue(local->workqueue);
|
|
wiphy_unregister(local->hw.wiphy);
|
|
ieee80211_wep_free(local);
|
|
ieee80211_led_exit(local);
|
|
kfree(local->int_scan_req);
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_unregister_hw);
|
|
|
|
void ieee80211_free_hw(struct ieee80211_hw *hw)
|
|
{
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
|
|
|
mutex_destroy(&local->iflist_mtx);
|
|
mutex_destroy(&local->scan_mtx);
|
|
|
|
wiphy_free(local->hw.wiphy);
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_free_hw);
|
|
|
|
static int __init ieee80211_init(void)
|
|
{
|
|
struct sk_buff *skb;
|
|
int ret;
|
|
|
|
BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
|
|
BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
|
|
IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
|
|
|
|
ret = rc80211_minstrel_init();
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = rc80211_pid_init();
|
|
if (ret)
|
|
return ret;
|
|
|
|
ieee80211_debugfs_netdev_init();
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit ieee80211_exit(void)
|
|
{
|
|
rc80211_pid_exit();
|
|
rc80211_minstrel_exit();
|
|
|
|
/*
|
|
* For key todo, it'll be empty by now but the work
|
|
* might still be scheduled.
|
|
*/
|
|
flush_scheduled_work();
|
|
|
|
if (mesh_allocated)
|
|
ieee80211s_stop();
|
|
|
|
ieee80211_debugfs_netdev_exit();
|
|
}
|
|
|
|
|
|
subsys_initcall(ieee80211_init);
|
|
module_exit(ieee80211_exit);
|
|
|
|
MODULE_DESCRIPTION("IEEE 802.11 subsystem");
|
|
MODULE_LICENSE("GPL");
|