![Michael Buesch](/assets/img/avatar_default.png)
Add a log message to ieee80211_restart_hw() to highlight that special codepath in the logs. This helps debugging bugs in the rarely tested restart code. Signed-off-by: Michael Buesch <mb@bu3sch.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>
1080 lines
28 KiB
C
1080 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 <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_params.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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#include "rate.h"
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#include "mesh.h"
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#include "wep.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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static bool ieee80211_disable_40mhz_24ghz;
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module_param(ieee80211_disable_40mhz_24ghz, bool, 0644);
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MODULE_PARM_DESC(ieee80211_disable_40mhz_24ghz,
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"Disable 40MHz support in the 2.4GHz band");
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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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{
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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_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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mc = drv_prepare_multicast(local, &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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/*
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* Returns true if we are logically configured to be on
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* the operating channel AND the hardware-conf is currently
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* configured on the operating channel. Compares channel-type
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* as well.
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*/
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bool ieee80211_cfg_on_oper_channel(struct ieee80211_local *local)
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{
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struct ieee80211_channel *chan, *scan_chan;
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enum nl80211_channel_type channel_type;
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/* This logic needs to match logic in ieee80211_hw_config */
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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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*/
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if (chan == local->oper_channel)
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channel_type = local->_oper_channel_type;
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else
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channel_type = NL80211_CHAN_NO_HT;
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} else if (local->tmp_channel) {
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chan = scan_chan = local->tmp_channel;
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channel_type = local->tmp_channel_type;
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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->oper_channel ||
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channel_type != local->_oper_channel_type)
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return false;
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/* Check current hardware-config against oper_channel. */
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if ((local->oper_channel != local->hw.conf.channel) ||
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(local->_oper_channel_type != local->hw.conf.channel_type))
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return false;
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return true;
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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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u32 offchannel_flag;
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might_sleep();
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scan_chan = local->scan_channel;
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/* If this off-channel logic ever changes, ieee80211_on_oper_channel
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* may need to change as well.
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*/
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offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
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if (scan_chan) {
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chan = scan_chan;
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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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*/
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if (chan == local->oper_channel)
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channel_type = local->_oper_channel_type;
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else
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channel_type = NL80211_CHAN_NO_HT;
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} else if (local->tmp_channel) {
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chan = scan_chan = local->tmp_channel;
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channel_type = local->tmp_channel_type;
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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->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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else
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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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}
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if (!conf_is_ht(&local->hw.conf)) {
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/*
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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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*/
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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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}
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if ((local->scanning & SCAN_SW_SCANNING) ||
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(local->scanning & SCAN_HW_SCANNING))
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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->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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} 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_WDS:
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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 || !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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} 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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!!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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!!sdata->u.ibss.presp;
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break;
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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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break;
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#endif
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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, &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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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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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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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_restart_work(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, restart_work);
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/* wait for scan work complete */
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flush_workqueue(local->workqueue);
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mutex_lock(&local->mtx);
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WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
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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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rtnl_lock();
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ieee80211_scan_cancel(local);
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ieee80211_reconfig(local);
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rtnl_unlock();
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}
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void ieee80211_restart_hw(struct ieee80211_hw *hw)
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{
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struct ieee80211_local *local = hw_to_local(hw);
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trace_api_restart_hw(local);
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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 */
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ieee80211_stop_queues_by_reason(hw,
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IEEE80211_QUEUE_STOP_REASON_SUSPEND);
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schedule_work(&local->restart_work);
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}
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EXPORT_SYMBOL(ieee80211_restart_hw);
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static void ieee80211_recalc_smps_work(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, recalc_smps);
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mutex_lock(&local->iflist_mtx);
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ieee80211_recalc_smps(local);
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mutex_unlock(&local->iflist_mtx);
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}
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#ifdef CONFIG_INET
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static int ieee80211_ifa_changed(struct notifier_block *nb,
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unsigned long data, void *arg)
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{
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struct in_ifaddr *ifa = arg;
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struct ieee80211_local *local =
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container_of(nb, struct ieee80211_local,
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ifa_notifier);
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struct net_device *ndev = ifa->ifa_dev->dev;
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struct wireless_dev *wdev = ndev->ieee80211_ptr;
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struct in_device *idev;
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struct ieee80211_sub_if_data *sdata;
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struct ieee80211_bss_conf *bss_conf;
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struct ieee80211_if_managed *ifmgd;
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int c = 0;
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/* Make sure it's our interface that got changed */
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if (!wdev)
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return NOTIFY_DONE;
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if (wdev->wiphy != local->hw.wiphy)
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return NOTIFY_DONE;
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sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
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bss_conf = &sdata->vif.bss_conf;
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if (!ieee80211_sdata_running(sdata))
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return NOTIFY_DONE;
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/* ARP filtering is only supported in managed mode */
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if (sdata->vif.type != NL80211_IFTYPE_STATION)
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return NOTIFY_DONE;
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idev = __in_dev_get_rtnl(sdata->dev);
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if (!idev)
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return NOTIFY_DONE;
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ifmgd = &sdata->u.mgd;
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mutex_lock(&ifmgd->mtx);
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/* Copy the addresses to the bss_conf list */
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ifa = idev->ifa_list;
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while (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN && ifa) {
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bss_conf->arp_addr_list[c] = ifa->ifa_address;
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ifa = ifa->ifa_next;
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c++;
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}
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/* If not all addresses fit the list, disable filtering */
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if (ifa) {
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sdata->arp_filter_state = false;
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c = 0;
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} else {
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sdata->arp_filter_state = true;
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}
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bss_conf->arp_addr_cnt = c;
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/* Configure driver only if associated */
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if (ifmgd->associated) {
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bss_conf->arp_filter_enabled = sdata->arp_filter_state;
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ieee80211_bss_info_change_notify(sdata,
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BSS_CHANGED_ARP_FILTER);
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}
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mutex_unlock(&ifmgd->mtx);
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return NOTIFY_DONE;
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}
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#endif
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static int ieee80211_napi_poll(struct napi_struct *napi, int budget)
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{
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struct ieee80211_local *local =
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container_of(napi, struct ieee80211_local, napi);
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return local->ops->napi_poll(&local->hw, budget);
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}
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void ieee80211_napi_schedule(struct ieee80211_hw *hw)
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{
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struct ieee80211_local *local = hw_to_local(hw);
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napi_schedule(&local->napi);
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}
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EXPORT_SYMBOL(ieee80211_napi_schedule);
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void ieee80211_napi_complete(struct ieee80211_hw *hw)
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{
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struct ieee80211_local *local = hw_to_local(hw);
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napi_complete(&local->napi);
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}
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EXPORT_SYMBOL(ieee80211_napi_complete);
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/* There isn't a lot of sense in it, but you can transmit anything you like */
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static const struct ieee80211_txrx_stypes
|
|
ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
|
|
[NL80211_IFTYPE_ADHOC] = {
|
|
.tx = 0xffff,
|
|
.rx = BIT(IEEE80211_STYPE_ACTION >> 4),
|
|
},
|
|
[NL80211_IFTYPE_STATION] = {
|
|
.tx = 0xffff,
|
|
.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
|
|
BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
|
|
},
|
|
[NL80211_IFTYPE_AP] = {
|
|
.tx = 0xffff,
|
|
.rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
|
|
BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
|
|
BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
|
|
BIT(IEEE80211_STYPE_DISASSOC >> 4) |
|
|
BIT(IEEE80211_STYPE_AUTH >> 4) |
|
|
BIT(IEEE80211_STYPE_DEAUTH >> 4) |
|
|
BIT(IEEE80211_STYPE_ACTION >> 4),
|
|
},
|
|
[NL80211_IFTYPE_AP_VLAN] = {
|
|
/* copy AP */
|
|
.tx = 0xffff,
|
|
.rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
|
|
BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
|
|
BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
|
|
BIT(IEEE80211_STYPE_DISASSOC >> 4) |
|
|
BIT(IEEE80211_STYPE_AUTH >> 4) |
|
|
BIT(IEEE80211_STYPE_DEAUTH >> 4) |
|
|
BIT(IEEE80211_STYPE_ACTION >> 4),
|
|
},
|
|
[NL80211_IFTYPE_P2P_CLIENT] = {
|
|
.tx = 0xffff,
|
|
.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
|
|
BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
|
|
},
|
|
[NL80211_IFTYPE_P2P_GO] = {
|
|
.tx = 0xffff,
|
|
.rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
|
|
BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
|
|
BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
|
|
BIT(IEEE80211_STYPE_DISASSOC >> 4) |
|
|
BIT(IEEE80211_STYPE_AUTH >> 4) |
|
|
BIT(IEEE80211_STYPE_DEAUTH >> 4) |
|
|
BIT(IEEE80211_STYPE_ACTION >> 4),
|
|
},
|
|
[NL80211_IFTYPE_MESH_POINT] = {
|
|
.tx = 0xffff,
|
|
.rx = BIT(IEEE80211_STYPE_ACTION >> 4),
|
|
},
|
|
};
|
|
|
|
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->mgmt_stypes = ieee80211_default_mgmt_stypes;
|
|
|
|
wiphy->privid = mac80211_wiphy_privid;
|
|
|
|
wiphy->flags |= WIPHY_FLAG_NETNS_OK |
|
|
WIPHY_FLAG_4ADDR_AP |
|
|
WIPHY_FLAG_4ADDR_STATION |
|
|
WIPHY_FLAG_SUPPORTS_SEPARATE_DEFAULT_KEYS;
|
|
|
|
if (!ops->set_key)
|
|
wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
|
|
|
|
wiphy->bss_priv_size = sizeof(struct ieee80211_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.max_report_rates = 0;
|
|
local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
|
|
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;
|
|
local->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
|
|
local->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
|
|
|
|
INIT_LIST_HEAD(&local->interfaces);
|
|
|
|
__hw_addr_init(&local->mc_list);
|
|
|
|
mutex_init(&local->iflist_mtx);
|
|
mutex_init(&local->mtx);
|
|
|
|
mutex_init(&local->key_mtx);
|
|
spin_lock_init(&local->filter_lock);
|
|
spin_lock_init(&local->queue_stop_reason_lock);
|
|
|
|
/*
|
|
* The rx_skb_queue is only accessed from tasklets,
|
|
* but other SKB queues are used from within IRQ
|
|
* context. Therefore, this one needs a different
|
|
* locking class so our direct, non-irq-safe use of
|
|
* the queue's lock doesn't throw lockdep warnings.
|
|
*/
|
|
skb_queue_head_init_class(&local->rx_skb_queue,
|
|
&ieee80211_rx_skb_queue_class);
|
|
|
|
INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
|
|
|
|
ieee80211_work_init(local);
|
|
|
|
INIT_WORK(&local->restart_work, ieee80211_restart_work);
|
|
|
|
INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
|
|
INIT_WORK(&local->recalc_smps, ieee80211_recalc_smps_work);
|
|
local->smps_mode = IEEE80211_SMPS_OFF;
|
|
|
|
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]);
|
|
atomic_set(&local->agg_queue_stop[i], 0);
|
|
}
|
|
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);
|
|
|
|
/* init dummy netdev for use w/ NAPI */
|
|
init_dummy_netdev(&local->napi_dev);
|
|
|
|
ieee80211_led_names(local);
|
|
|
|
ieee80211_hw_roc_setup(local);
|
|
|
|
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, max_bitrates;
|
|
bool supp_ht;
|
|
static const u32 cipher_suites[] = {
|
|
/* keep WEP first, it may be removed below */
|
|
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
|
|
};
|
|
|
|
if (hw->max_report_rates == 0)
|
|
hw->max_report_rates = hw->max_rates;
|
|
|
|
/*
|
|
* 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;
|
|
|
|
/*
|
|
* Since ieee80211_disable_40mhz_24ghz is global, we can
|
|
* modify the sband's ht data even if the driver uses a
|
|
* global structure for that.
|
|
*/
|
|
if (ieee80211_disable_40mhz_24ghz &&
|
|
band == IEEE80211_BAND_2GHZ &&
|
|
sband->ht_cap.ht_supported) {
|
|
sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
|
|
sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40;
|
|
}
|
|
|
|
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);
|
|
|
|
#ifndef CONFIG_MAC80211_MESH
|
|
/* mesh depends on Kconfig, but drivers should set it if they want */
|
|
local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
|
|
#endif
|
|
|
|
/* mac80211 supports control port protocol changing */
|
|
local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
|
|
|
|
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;
|
|
|
|
WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
|
|
&& (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
|
|
"U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
|
|
|
|
/*
|
|
* Calculate scan IE length -- we need this to alloc
|
|
* memory and to subtract from the driver limit. It
|
|
* includes the DS Params, (extended) supported rates, and HT
|
|
* information -- SSID is the driver's responsibility.
|
|
*/
|
|
local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
|
|
3 /* DS Params */;
|
|
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;
|
|
|
|
/* Set up cipher suites unless driver already did */
|
|
if (!local->hw.wiphy->cipher_suites) {
|
|
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--;
|
|
}
|
|
if (IS_ERR(local->wep_tx_tfm) || IS_ERR(local->wep_rx_tfm)) {
|
|
if (local->hw.wiphy->cipher_suites == cipher_suites) {
|
|
local->hw.wiphy->cipher_suites += 2;
|
|
local->hw.wiphy->n_cipher_suites -= 2;
|
|
} else {
|
|
u32 *suites;
|
|
int r, w = 0;
|
|
|
|
/* Filter out WEP */
|
|
|
|
suites = kmemdup(
|
|
local->hw.wiphy->cipher_suites,
|
|
sizeof(u32) * local->hw.wiphy->n_cipher_suites,
|
|
GFP_KERNEL);
|
|
if (!suites)
|
|
return -ENOMEM;
|
|
for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
|
|
u32 suite = local->hw.wiphy->cipher_suites[r];
|
|
if (suite == WLAN_CIPHER_SUITE_WEP40 ||
|
|
suite == WLAN_CIPHER_SUITE_WEP104)
|
|
continue;
|
|
suites[w++] = suite;
|
|
}
|
|
local->hw.wiphy->cipher_suites = suites;
|
|
local->hw.wiphy->n_cipher_suites = w;
|
|
local->wiphy_ciphers_allocated = true;
|
|
}
|
|
}
|
|
|
|
if (!local->ops->remain_on_channel)
|
|
local->hw.wiphy->max_remain_on_channel_duration = 5000;
|
|
|
|
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 =
|
|
alloc_ordered_workqueue(wiphy_name(local->hw.wiphy), 0);
|
|
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.
|
|
*/
|
|
BUILD_BUG_ON(IEEE80211_TX_STATUS_HEADROOM !=
|
|
sizeof(struct ieee80211_tx_status_rtap_hdr));
|
|
local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
|
|
sizeof(struct ieee80211_tx_status_rtap_hdr));
|
|
|
|
debugfs_hw_add(local);
|
|
|
|
/*
|
|
* if the driver doesn't specify a max listen interval we
|
|
* use 5 which should be a safe default
|
|
*/
|
|
if (local->hw.max_listen_interval == 0)
|
|
local->hw.max_listen_interval = 5;
|
|
|
|
local->hw.conf.listen_interval = local->hw.max_listen_interval;
|
|
|
|
local->dynamic_ps_forced_timeout = -1;
|
|
|
|
result = sta_info_start(local);
|
|
if (result < 0)
|
|
goto fail_sta_info;
|
|
|
|
result = ieee80211_wep_init(local);
|
|
if (result < 0)
|
|
wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
|
|
result);
|
|
|
|
rtnl_lock();
|
|
|
|
result = ieee80211_init_rate_ctrl_alg(local,
|
|
hw->rate_control_algorithm);
|
|
if (result < 0) {
|
|
wiphy_debug(local->hw.wiphy,
|
|
"Failed to initialize rate control algorithm\n");
|
|
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)
|
|
wiphy_warn(local->hw.wiphy,
|
|
"Failed to add default virtual iface\n");
|
|
}
|
|
|
|
rtnl_unlock();
|
|
|
|
ieee80211_led_init(local);
|
|
|
|
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;
|
|
}
|
|
|
|
#ifdef CONFIG_INET
|
|
local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
|
|
result = register_inetaddr_notifier(&local->ifa_notifier);
|
|
if (result)
|
|
goto fail_ifa;
|
|
#endif
|
|
|
|
netif_napi_add(&local->napi_dev, &local->napi, ieee80211_napi_poll,
|
|
local->hw.napi_weight);
|
|
|
|
return 0;
|
|
|
|
#ifdef CONFIG_INET
|
|
fail_ifa:
|
|
pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
|
|
&local->network_latency_notifier);
|
|
rtnl_lock();
|
|
#endif
|
|
fail_pm_qos:
|
|
ieee80211_led_exit(local);
|
|
ieee80211_remove_interfaces(local);
|
|
fail_rate:
|
|
rtnl_unlock();
|
|
ieee80211_wep_free(local);
|
|
sta_info_stop(local);
|
|
fail_sta_info:
|
|
destroy_workqueue(local->workqueue);
|
|
fail_workqueue:
|
|
wiphy_unregister(local->hw.wiphy);
|
|
fail_wiphy_register:
|
|
if (local->wiphy_ciphers_allocated)
|
|
kfree(local->hw.wiphy->cipher_suites);
|
|
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);
|
|
#ifdef CONFIG_INET
|
|
unregister_inetaddr_notifier(&local->ifa_notifier);
|
|
#endif
|
|
|
|
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();
|
|
|
|
/*
|
|
* Now all work items will be gone, but the
|
|
* timer might still be armed, so delete it
|
|
*/
|
|
del_timer_sync(&local->work_timer);
|
|
|
|
cancel_work_sync(&local->restart_work);
|
|
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))
|
|
wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
|
|
skb_queue_purge(&local->skb_queue);
|
|
skb_queue_purge(&local->skb_queue_unreliable);
|
|
skb_queue_purge(&local->rx_skb_queue);
|
|
|
|
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->mtx);
|
|
|
|
if (local->wiphy_ciphers_allocated)
|
|
kfree(local->hw.wiphy->cipher_suites);
|
|
|
|
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_minstrel_ht_init();
|
|
if (ret)
|
|
goto err_minstrel;
|
|
|
|
ret = rc80211_pid_init();
|
|
if (ret)
|
|
goto err_pid;
|
|
|
|
ret = ieee80211_iface_init();
|
|
if (ret)
|
|
goto err_netdev;
|
|
|
|
return 0;
|
|
err_netdev:
|
|
rc80211_pid_exit();
|
|
err_pid:
|
|
rc80211_minstrel_ht_exit();
|
|
err_minstrel:
|
|
rc80211_minstrel_exit();
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void __exit ieee80211_exit(void)
|
|
{
|
|
rc80211_pid_exit();
|
|
rc80211_minstrel_ht_exit();
|
|
rc80211_minstrel_exit();
|
|
|
|
if (mesh_allocated)
|
|
ieee80211s_stop();
|
|
|
|
ieee80211_iface_exit();
|
|
}
|
|
|
|
|
|
subsys_initcall(ieee80211_init);
|
|
module_exit(ieee80211_exit);
|
|
|
|
MODULE_DESCRIPTION("IEEE 802.11 subsystem");
|
|
MODULE_LICENSE("GPL");
|