WLAN_EID_OPMODE_NOTIF = 199,
WLAN_EID_WIDE_BW_CHANNEL_SWITCH = 194,
WLAN_EID_CHANNEL_SWITCH_WRAPPER = 196,
+ WLAN_EID_EXTENDED_BSS_LOAD = 193,
+ WLAN_EID_VHT_TX_POWER_ENVELOPE = 195,
+ WLAN_EID_AID = 197,
+ WLAN_EID_QUIET_CHANNEL = 198,
/* 802.11ad */
WLAN_EID_NON_TX_BSSID_CAP = 83,
WLAN_TDLS_DISCOVERY_REQUEST = 10,
};
+/* Interworking capabilities are set in 7th bit of 4th byte of the
+ * @WLAN_EID_EXT_CAPABILITY information element
+ */
+#define WLAN_EXT_CAPA4_INTERWORKING_ENABLED BIT(7)
+
/*
* TDLS capabililites to be enabled in the 5th byte of the
* @WLAN_EID_EXT_CAPABILITY information element
bool radar_required;
};
+/**
+ * struct cfg80211_csa_settings - channel switch settings
+ *
+ * Used for channel switch
+ *
+ * @chandef: defines the channel to use after the switch
+ * @beacon_csa: beacon data while performing the switch
+ * @counter_offset_beacon: offset for the counter within the beacon (tail)
+ * @counter_offset_presp: offset for the counter within the probe response
+ * @beacon_after: beacon data to be used on the new channel
+ * @radar_required: whether radar detection is required on the new channel
+ * @block_tx: whether transmissions should be blocked while changing
+ * @count: number of beacons until switch
+ */
+struct cfg80211_csa_settings {
+ struct cfg80211_chan_def chandef;
+ struct cfg80211_beacon_data beacon_csa;
+ u16 counter_offset_beacon, counter_offset_presp;
+ struct cfg80211_beacon_data beacon_after;
+ bool radar_required;
+ bool block_tx;
+ u8 count;
+};
+
/**
* enum station_parameters_apply_mask - station parameter values to apply
* @STATION_PARAM_APPLY_UAPSD: apply new uAPSD parameters (uapsd_queues, max_sp)
* @crit_proto_stop: Indicates critical protocol no longer needs increased link
* reliability. This operation can not fail.
* @set_coalesce: Set coalesce parameters.
+ *
+ * @channel_switch: initiate channel-switch procedure (with CSA)
*/
struct cfg80211_ops {
int (*suspend)(struct wiphy *wiphy, struct cfg80211_wowlan *wow);
struct wireless_dev *wdev);
int (*set_coalesce)(struct wiphy *wiphy,
struct cfg80211_coalesce *coalesce);
+
+ int (*channel_switch)(struct wiphy *wiphy,
+ struct net_device *dev,
+ struct cfg80211_csa_settings *params);
};
/*
* @WIPHY_FLAG_OFFCHAN_TX: Device supports direct off-channel TX.
* @WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL: Device supports remain-on-channel call.
* @WIPHY_FLAG_SUPPORTS_5_10_MHZ: Device supports 5 MHz and 10 MHz channels.
+ * @WIPHY_FLAG_HAS_CHANNEL_SWITCH: Device supports channel switch in
+ * beaconing mode (AP, IBSS, Mesh, ...).
*/
enum wiphy_flags {
WIPHY_FLAG_CUSTOM_REGULATORY = BIT(0),
WIPHY_FLAG_OFFCHAN_TX = BIT(20),
WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL = BIT(21),
WIPHY_FLAG_SUPPORTS_5_10_MHZ = BIT(22),
+ WIPHY_FLAG_HAS_CHANNEL_SWITCH = BIT(23),
};
/**
* @IEEE80211_CHANCTX_CHANGE_WIDTH: The channel width changed
* @IEEE80211_CHANCTX_CHANGE_RX_CHAINS: The number of RX chains changed
* @IEEE80211_CHANCTX_CHANGE_RADAR: radar detection flag changed
+ * @IEEE80211_CHANCTX_CHANGE_CHANNEL: switched to another operating channel,
+ * this is used only with channel switching with CSA
*/
enum ieee80211_chanctx_change {
IEEE80211_CHANCTX_CHANGE_WIDTH = BIT(0),
IEEE80211_CHANCTX_CHANGE_RX_CHAINS = BIT(1),
IEEE80211_CHANCTX_CHANGE_RADAR = BIT(2),
+ IEEE80211_CHANCTX_CHANGE_CHANNEL = BIT(3),
};
/**
* @addr: address of this interface
* @p2p: indicates whether this AP or STA interface is a p2p
* interface, i.e. a GO or p2p-sta respectively
+ * @csa_active: marks whether a channel switch is going on
* @driver_flags: flags/capabilities the driver has for this interface,
* these need to be set (or cleared) when the interface is added
* or, if supported by the driver, the interface type is changed
struct ieee80211_bss_conf bss_conf;
u8 addr[ETH_ALEN];
bool p2p;
+ bool csa_active;
u8 cab_queue;
u8 hw_queue[IEEE80211_NUM_ACS];
* @ipv6_addr_change: IPv6 address assignment on the given interface changed.
* Currently, this is only called for managed or P2P client interfaces.
* This callback is optional; it must not sleep.
+ *
+ * @channel_switch_beacon: Starts a channel switch to a new channel.
+ * Beacons are modified to include CSA or ECSA IEs before calling this
+ * function. The corresponding count fields in these IEs must be
+ * decremented, and when they reach zero the driver must call
+ * ieee80211_csa_finish(). Drivers which use ieee80211_beacon_get()
+ * get the csa counter decremented by mac80211, but must check if it is
+ * zero using ieee80211_csa_is_complete() after the beacon has been
+ * transmitted and then call ieee80211_csa_finish().
+ *
*/
struct ieee80211_ops {
void (*tx)(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct inet6_dev *idev);
#endif
+ void (*channel_switch_beacon)(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif,
+ struct cfg80211_chan_def *chandef);
};
/**
return ieee80211_beacon_get_tim(hw, vif, NULL, NULL);
}
+/**
+ * ieee80211_csa_finish - notify mac80211 about channel switch
+ * @vif: &struct ieee80211_vif pointer from the add_interface callback.
+ *
+ * After a channel switch announcement was scheduled and the counter in this
+ * announcement hit zero, this function must be called by the driver to
+ * notify mac80211 that the channel can be changed.
+ */
+void ieee80211_csa_finish(struct ieee80211_vif *vif);
+
+/**
+ * ieee80211_csa_is_complete - find out if counters reached zero
+ * @vif: &struct ieee80211_vif pointer from the add_interface callback.
+ *
+ * This function returns whether the channel switch counters reached zero.
+ */
+bool ieee80211_csa_is_complete(struct ieee80211_vif *vif);
+
+
/**
* ieee80211_proberesp_get - retrieve a Probe Response template
* @hw: pointer obtained from ieee80211_alloc_hw().
* @NL80211_CMD_GET_COALESCE: Get currently supported coalesce rules.
* @NL80211_CMD_SET_COALESCE: Configure coalesce rules or clear existing rules.
*
+ * @NL80211_CMD_CHANNEL_SWITCH: Perform a channel switch by announcing the
+ * the new channel information (Channel Switch Announcement - CSA)
+ * in the beacon for some time (as defined in the
+ * %NL80211_ATTR_CH_SWITCH_COUNT parameter) and then change to the
+ * new channel. Userspace provides the new channel information (using
+ * %NL80211_ATTR_WIPHY_FREQ and the attributes determining channel
+ * width). %NL80211_ATTR_CH_SWITCH_BLOCK_TX may be supplied to inform
+ * other station that transmission must be blocked until the channel
+ * switch is complete.
+ *
* @NL80211_CMD_MAX: highest used command number
* @__NL80211_CMD_AFTER_LAST: internal use
*/
NL80211_CMD_GET_COALESCE,
NL80211_CMD_SET_COALESCE,
+ NL80211_CMD_CHANNEL_SWITCH,
+
/* add new commands above here */
/* used to define NL80211_CMD_MAX below */
*
* @NL80211_ATTR_COALESCE_RULE: Coalesce rule information.
*
+ * @NL80211_ATTR_CH_SWITCH_COUNT: u32 attribute specifying the number of TBTT's
+ * until the channel switch event.
+ * @NL80211_ATTR_CH_SWITCH_BLOCK_TX: flag attribute specifying that transmission
+ * must be blocked on the current channel (before the channel switch
+ * operation).
+ * @NL80211_ATTR_CSA_IES: Nested set of attributes containing the IE information
+ * for the time while performing a channel switch.
+ * @NL80211_ATTR_CSA_C_OFF_BEACON: Offset of the channel switch counter
+ * field in the beacons tail (%NL80211_ATTR_BEACON_TAIL).
+ * @NL80211_ATTR_CSA_C_OFF_PRESP: Offset of the channel switch counter
+ * field in the probe response (%NL80211_ATTR_PROBE_RESP).
+ *
* @NL80211_ATTR_MAX: highest attribute number currently defined
* @__NL80211_ATTR_AFTER_LAST: internal use
*/
NL80211_ATTR_COALESCE_RULE,
+ NL80211_ATTR_CH_SWITCH_COUNT,
+ NL80211_ATTR_CH_SWITCH_BLOCK_TX,
+ NL80211_ATTR_CSA_IES,
+ NL80211_ATTR_CSA_C_OFF_BEACON,
+ NL80211_ATTR_CSA_C_OFF_PRESP,
+
/* add attributes here, update the policy in nl80211.c */
__NL80211_ATTR_AFTER_LAST,
return 0;
}
-static int ieee80211_assign_beacon(struct ieee80211_sub_if_data *sdata,
- struct cfg80211_beacon_data *params)
+int ieee80211_assign_beacon(struct ieee80211_sub_if_data *sdata,
+ struct cfg80211_beacon_data *params)
{
struct beacon_data *new, *old;
int new_head_len, new_tail_len;
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ /* don't allow changing the beacon while CSA is in place - offset
+ * of channel switch counter may change
+ */
+ if (sdata->vif.csa_active)
+ return -EBUSY;
+
old = rtnl_dereference(sdata->u.ap.beacon);
if (!old)
return -ENOENT;
return -ENOENT;
old_probe_resp = rtnl_dereference(sdata->u.ap.probe_resp);
+ /* abort any running channel switch */
+ sdata->vif.csa_active = false;
+ cancel_work_sync(&sdata->csa_finalize_work);
+
/* turn off carrier for this interface and dependent VLANs */
list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list)
netif_carrier_off(vlan->dev);
return 0;
}
+static struct cfg80211_beacon_data *
+cfg80211_beacon_dup(struct cfg80211_beacon_data *beacon)
+{
+ struct cfg80211_beacon_data *new_beacon;
+ u8 *pos;
+ int len;
+
+ len = beacon->head_len + beacon->tail_len + beacon->beacon_ies_len +
+ beacon->proberesp_ies_len + beacon->assocresp_ies_len +
+ beacon->probe_resp_len;
+
+ new_beacon = kzalloc(sizeof(*new_beacon) + len, GFP_KERNEL);
+ if (!new_beacon)
+ return NULL;
+
+ pos = (u8 *)(new_beacon + 1);
+ if (beacon->head_len) {
+ new_beacon->head_len = beacon->head_len;
+ new_beacon->head = pos;
+ memcpy(pos, beacon->head, beacon->head_len);
+ pos += beacon->head_len;
+ }
+ if (beacon->tail_len) {
+ new_beacon->tail_len = beacon->tail_len;
+ new_beacon->tail = pos;
+ memcpy(pos, beacon->tail, beacon->tail_len);
+ pos += beacon->tail_len;
+ }
+ if (beacon->beacon_ies_len) {
+ new_beacon->beacon_ies_len = beacon->beacon_ies_len;
+ new_beacon->beacon_ies = pos;
+ memcpy(pos, beacon->beacon_ies, beacon->beacon_ies_len);
+ pos += beacon->beacon_ies_len;
+ }
+ if (beacon->proberesp_ies_len) {
+ new_beacon->proberesp_ies_len = beacon->proberesp_ies_len;
+ new_beacon->proberesp_ies = pos;
+ memcpy(pos, beacon->proberesp_ies, beacon->proberesp_ies_len);
+ pos += beacon->proberesp_ies_len;
+ }
+ if (beacon->assocresp_ies_len) {
+ new_beacon->assocresp_ies_len = beacon->assocresp_ies_len;
+ new_beacon->assocresp_ies = pos;
+ memcpy(pos, beacon->assocresp_ies, beacon->assocresp_ies_len);
+ pos += beacon->assocresp_ies_len;
+ }
+ if (beacon->probe_resp_len) {
+ new_beacon->probe_resp_len = beacon->probe_resp_len;
+ beacon->probe_resp = pos;
+ memcpy(pos, beacon->probe_resp, beacon->probe_resp_len);
+ pos += beacon->probe_resp_len;
+ }
+
+ return new_beacon;
+}
+
+void ieee80211_csa_finalize_work(struct work_struct *work)
+{
+ struct ieee80211_sub_if_data *sdata =
+ container_of(work, struct ieee80211_sub_if_data,
+ csa_finalize_work);
+ struct ieee80211_local *local = sdata->local;
+ int err, changed;
+
+ if (!ieee80211_sdata_running(sdata))
+ return;
+
+ if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP))
+ return;
+
+ sdata->radar_required = sdata->csa_radar_required;
+ err = ieee80211_vif_change_channel(sdata, &local->csa_chandef,
+ &changed);
+ if (WARN_ON(err < 0))
+ return;
+
+ err = ieee80211_assign_beacon(sdata, sdata->u.ap.next_beacon);
+ if (err < 0)
+ return;
+
+ changed |= err;
+ kfree(sdata->u.ap.next_beacon);
+ sdata->u.ap.next_beacon = NULL;
+ sdata->vif.csa_active = false;
+
+ ieee80211_wake_queues_by_reason(&sdata->local->hw,
+ IEEE80211_MAX_QUEUE_MAP,
+ IEEE80211_QUEUE_STOP_REASON_CSA);
+
+ ieee80211_bss_info_change_notify(sdata, changed);
+
+ cfg80211_ch_switch_notify(sdata->dev, &local->csa_chandef);
+}
+
+static int ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
+ struct cfg80211_csa_settings *params)
+{
+ struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ struct ieee80211_local *local = sdata->local;
+ struct ieee80211_chanctx_conf *chanctx_conf;
+ struct ieee80211_chanctx *chanctx;
+ int err, num_chanctx;
+
+ if (!list_empty(&local->roc_list) || local->scanning)
+ return -EBUSY;
+
+ if (sdata->wdev.cac_started)
+ return -EBUSY;
+
+ if (cfg80211_chandef_identical(¶ms->chandef,
+ &sdata->vif.bss_conf.chandef))
+ return -EINVAL;
+
+ rcu_read_lock();
+ chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+ if (!chanctx_conf) {
+ rcu_read_unlock();
+ return -EBUSY;
+ }
+
+ /* don't handle for multi-VIF cases */
+ chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
+ if (chanctx->refcount > 1) {
+ rcu_read_unlock();
+ return -EBUSY;
+ }
+ num_chanctx = 0;
+ list_for_each_entry_rcu(chanctx, &local->chanctx_list, list)
+ num_chanctx++;
+ rcu_read_unlock();
+
+ if (num_chanctx > 1)
+ return -EBUSY;
+
+ /* don't allow another channel switch if one is already active. */
+ if (sdata->vif.csa_active)
+ return -EBUSY;
+
+ /* only handle AP for now. */
+ switch (sdata->vif.type) {
+ case NL80211_IFTYPE_AP:
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
+
+ sdata->u.ap.next_beacon = cfg80211_beacon_dup(¶ms->beacon_after);
+ if (!sdata->u.ap.next_beacon)
+ return -ENOMEM;
+
+ sdata->csa_counter_offset_beacon = params->counter_offset_beacon;
+ sdata->csa_counter_offset_presp = params->counter_offset_presp;
+ sdata->csa_radar_required = params->radar_required;
+
+ if (params->block_tx)
+ ieee80211_stop_queues_by_reason(&local->hw,
+ IEEE80211_MAX_QUEUE_MAP,
+ IEEE80211_QUEUE_STOP_REASON_CSA);
+
+ err = ieee80211_assign_beacon(sdata, ¶ms->beacon_csa);
+ if (err < 0)
+ return err;
+
+ local->csa_chandef = params->chandef;
+ sdata->vif.csa_active = true;
+
+ ieee80211_bss_info_change_notify(sdata, err);
+ drv_channel_switch_beacon(sdata, ¶ms->chandef);
+
+ return 0;
+}
+
static int ieee80211_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev,
struct ieee80211_channel *chan, bool offchan,
unsigned int wait, const u8 *buf, size_t len,
.get_et_strings = ieee80211_get_et_strings,
.get_channel = ieee80211_cfg_get_channel,
.start_radar_detection = ieee80211_start_radar_detection,
+ .channel_switch = ieee80211_channel_switch,
};
return ret;
}
+int ieee80211_vif_change_channel(struct ieee80211_sub_if_data *sdata,
+ const struct cfg80211_chan_def *chandef,
+ u32 *changed)
+{
+ struct ieee80211_local *local = sdata->local;
+ struct ieee80211_chanctx_conf *conf;
+ struct ieee80211_chanctx *ctx;
+ int ret;
+ u32 chanctx_changed = 0;
+
+ /* should never be called if not performing a channel switch. */
+ if (WARN_ON(!sdata->vif.csa_active))
+ return -EINVAL;
+
+ if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
+ IEEE80211_CHAN_DISABLED))
+ return -EINVAL;
+
+ mutex_lock(&local->chanctx_mtx);
+ conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
+ lockdep_is_held(&local->chanctx_mtx));
+ if (!conf) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ ctx = container_of(conf, struct ieee80211_chanctx, conf);
+ if (ctx->refcount != 1) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (sdata->vif.bss_conf.chandef.width != chandef->width) {
+ chanctx_changed = IEEE80211_CHANCTX_CHANGE_WIDTH;
+ *changed |= BSS_CHANGED_BANDWIDTH;
+ }
+
+ sdata->vif.bss_conf.chandef = *chandef;
+ ctx->conf.def = *chandef;
+
+ chanctx_changed |= IEEE80211_CHANCTX_CHANGE_CHANNEL;
+ drv_change_chanctx(local, ctx, chanctx_changed);
+
+ if (!local->use_chanctx) {
+ local->_oper_chandef = *chandef;
+ ieee80211_hw_config(local, 0);
+ }
+
+ ieee80211_recalc_chanctx_chantype(local, ctx);
+ ieee80211_recalc_smps_chanctx(local, ctx);
+ ieee80211_recalc_radar_chanctx(local, ctx);
+
+ ret = 0;
+ out:
+ mutex_unlock(&local->chanctx_mtx);
+ return ret;
+}
+
int ieee80211_vif_change_bandwidth(struct ieee80211_sub_if_data *sdata,
const struct cfg80211_chan_def *chandef,
u32 *changed)
DEBUGFS_ADD_COUNTER(tx_retry_count, tx_retry_count);
DEBUGFS_ADD_COUNTER(wep_weak_iv_count, wep_weak_iv_count);
+ if (sizeof(sta->driver_buffered_tids) == sizeof(u32))
+ debugfs_create_x32("driver_buffered_tids", 0400,
+ sta->debugfs.dir,
+ (u32 *)&sta->driver_buffered_tids);
+ else
+ debugfs_create_x64("driver_buffered_tids", 0400,
+ sta->debugfs.dir,
+ (u64 *)&sta->driver_buffered_tids);
+
drv_sta_add_debugfs(local, sdata, &sta->sta, sta->debugfs.dir);
}
}
#endif
+static inline void
+drv_channel_switch_beacon(struct ieee80211_sub_if_data *sdata,
+ struct cfg80211_chan_def *chandef)
+{
+ struct ieee80211_local *local = sdata->local;
+
+ if (local->ops->channel_switch_beacon) {
+ trace_drv_channel_switch_beacon(local, sdata, chandef);
+ local->ops->channel_switch_beacon(&local->hw, &sdata->vif,
+ chandef);
+ }
+}
+
#endif /* __MAC80211_DRIVER_OPS */
#define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
#define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
+#define IEEE80211_IBSS_RSN_INACTIVITY_LIMIT (10 * HZ)
#define IEEE80211_IBSS_MAX_STA_ENTRIES 128
return active;
}
+static void ieee80211_ibss_sta_expire(struct ieee80211_sub_if_data *sdata)
+{
+ struct ieee80211_local *local = sdata->local;
+ struct sta_info *sta, *tmp;
+ unsigned long exp_time = IEEE80211_IBSS_INACTIVITY_LIMIT;
+ unsigned long exp_rsn_time = IEEE80211_IBSS_RSN_INACTIVITY_LIMIT;
+
+ mutex_lock(&local->sta_mtx);
+
+ list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
+ if (sdata != sta->sdata)
+ continue;
+
+ if (time_after(jiffies, sta->last_rx + exp_time) ||
+ (time_after(jiffies, sta->last_rx + exp_rsn_time) &&
+ sta->sta_state != IEEE80211_STA_AUTHORIZED)) {
+ sta_dbg(sta->sdata, "expiring inactive %sSTA %pM\n",
+ sta->sta_state != IEEE80211_STA_AUTHORIZED ?
+ "not authorized " : "", sta->sta.addr);
+
+ WARN_ON(__sta_info_destroy(sta));
+ }
+ }
+
+ mutex_unlock(&local->sta_mtx);
+}
+
/*
* This function is called with state == IEEE80211_IBSS_MLME_JOINED
*/
mod_timer(&ifibss->timer,
round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL));
- ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT);
+ ieee80211_ibss_sta_expire(sdata);
if (time_before(jiffies, ifibss->last_scan_completed +
IEEE80211_IBSS_MERGE_INTERVAL))
struct beacon_data __rcu *beacon;
struct probe_resp __rcu *probe_resp;
+ /* to be used after channel switch. */
+ struct cfg80211_beacon_data *next_beacon;
struct list_head vlans;
struct ps_data ps;
struct ieee80211_tx_queue_params tx_conf[IEEE80211_NUM_ACS];
+ struct work_struct csa_finalize_work;
+ int csa_counter_offset_beacon;
+ int csa_counter_offset_presp;
+ bool csa_radar_required;
+
/* used to reconfigure hardware SM PS */
struct work_struct recalc_smps;
u32 dot11TransmittedFrameCount;
#ifdef CONFIG_MAC80211_LEDS
- int tx_led_counter, rx_led_counter;
struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
struct tpt_led_trigger *tpt_led_trigger;
char tx_led_name[32], rx_led_name[32],
void ieee80211_sw_roc_work(struct work_struct *work);
void ieee80211_handle_roc_started(struct ieee80211_roc_work *roc);
+/* channel switch handling */
+void ieee80211_csa_finalize_work(struct work_struct *work);
+
/* interface handling */
int ieee80211_iface_init(void);
void ieee80211_iface_exit(void);
bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata);
void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata);
+int ieee80211_assign_beacon(struct ieee80211_sub_if_data *sdata,
+ struct cfg80211_beacon_data *params);
static inline bool ieee80211_sdata_running(struct ieee80211_sub_if_data *sdata)
{
ieee80211_vif_change_bandwidth(struct ieee80211_sub_if_data *sdata,
const struct cfg80211_chan_def *chandef,
u32 *changed);
+/* NOTE: only use ieee80211_vif_change_channel() for channel switch */
+int __must_check
+ieee80211_vif_change_channel(struct ieee80211_sub_if_data *sdata,
+ const struct cfg80211_chan_def *chandef,
+ u32 *changed);
void ieee80211_vif_release_channel(struct ieee80211_sub_if_data *sdata);
void ieee80211_vif_vlan_copy_chanctx(struct ieee80211_sub_if_data *sdata);
void ieee80211_vif_copy_chanctx_to_vlans(struct ieee80211_sub_if_data *sdata,
if (iftype == NL80211_IFTYPE_ADHOC &&
nsdata->vif.type == NL80211_IFTYPE_ADHOC)
return -EBUSY;
+ /*
+ * will not add another interface while any channel
+ * switch is active.
+ */
+ if (nsdata->vif.csa_active)
+ return -EBUSY;
/*
* The remaining checks are only performed for interfaces
cancel_work_sync(&local->dynamic_ps_enable_work);
cancel_work_sync(&sdata->recalc_smps);
+ sdata->vif.csa_active = false;
+ cancel_work_sync(&sdata->csa_finalize_work);
cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
skb_queue_head_init(&sdata->skb_queue);
INIT_WORK(&sdata->work, ieee80211_iface_work);
INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
+ INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
switch (type) {
case NL80211_IFTYPE_P2P_GO:
#include <linux/export.h>
#include "led.h"
+#define MAC80211_BLINK_DELAY 50 /* ms */
+
void ieee80211_led_rx(struct ieee80211_local *local)
{
+ unsigned long led_delay = MAC80211_BLINK_DELAY;
if (unlikely(!local->rx_led))
return;
- if (local->rx_led_counter++ % 2 == 0)
- led_trigger_event(local->rx_led, LED_OFF);
- else
- led_trigger_event(local->rx_led, LED_FULL);
+ led_trigger_blink_oneshot(local->rx_led, &led_delay, &led_delay, 0);
}
-/* q is 1 if a packet was enqueued, 0 if it has been transmitted */
-void ieee80211_led_tx(struct ieee80211_local *local, int q)
+void ieee80211_led_tx(struct ieee80211_local *local)
{
+ unsigned long led_delay = MAC80211_BLINK_DELAY;
if (unlikely(!local->tx_led))
return;
- /* not sure how this is supposed to work ... */
- local->tx_led_counter += 2*q-1;
- if (local->tx_led_counter % 2 == 0)
- led_trigger_event(local->tx_led, LED_OFF);
- else
- led_trigger_event(local->tx_led, LED_FULL);
+ led_trigger_blink_oneshot(local->tx_led, &led_delay, &led_delay, 0);
}
void ieee80211_led_assoc(struct ieee80211_local *local, bool associated)
#ifdef CONFIG_MAC80211_LEDS
void ieee80211_led_rx(struct ieee80211_local *local);
-void ieee80211_led_tx(struct ieee80211_local *local, int q);
+void ieee80211_led_tx(struct ieee80211_local *local);
void ieee80211_led_assoc(struct ieee80211_local *local,
bool associated);
void ieee80211_led_radio(struct ieee80211_local *local,
static inline void ieee80211_led_rx(struct ieee80211_local *local)
{
}
-static inline void ieee80211_led_tx(struct ieee80211_local *local, int q)
+static inline void ieee80211_led_tx(struct ieee80211_local *local)
{
}
static inline void ieee80211_led_assoc(struct ieee80211_local *local,
/* IEEE80211_RADIOTAP_RATE rate */
if (info->status.rates[0].idx >= 0 &&
- !(info->status.rates[0].flags & IEEE80211_TX_RC_MCS))
+ !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS |
+ IEEE80211_TX_RC_VHT_MCS)))
len += 2;
/* IEEE80211_RADIOTAP_TX_FLAGS */
/* IEEE80211_RADIOTAP_DATA_RETRIES */
len += 1;
- /* IEEE80211_TX_RC_MCS */
- if (info->status.rates[0].idx >= 0 &&
- info->status.rates[0].flags & IEEE80211_TX_RC_MCS)
- len += 3;
+ /* IEEE80211_RADIOTAP_MCS
+ * IEEE80211_RADIOTAP_VHT */
+ if (info->status.rates[0].idx >= 0) {
+ if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS)
+ len += 3;
+ else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS)
+ len = ALIGN(len, 2) + 12;
+ }
return len;
}
static void
-ieee80211_add_tx_radiotap_header(struct ieee80211_supported_band *sband,
+ieee80211_add_tx_radiotap_header(struct ieee80211_local *local,
+ struct ieee80211_supported_band *sband,
struct sk_buff *skb, int retry_count,
int rtap_len, int shift)
{
/* IEEE80211_RADIOTAP_RATE */
if (info->status.rates[0].idx >= 0 &&
- !(info->status.rates[0].flags & IEEE80211_TX_RC_MCS)) {
+ !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS |
+ IEEE80211_TX_RC_VHT_MCS))) {
u16 rate;
rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE);
*pos = retry_count;
pos++;
- /* IEEE80211_TX_RC_MCS */
- if (info->status.rates[0].idx >= 0 &&
- info->status.rates[0].flags & IEEE80211_TX_RC_MCS) {
+ if (info->status.rates[0].idx < 0)
+ return;
+
+ /* IEEE80211_RADIOTAP_MCS
+ * IEEE80211_RADIOTAP_VHT */
+ if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) {
rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS);
pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
IEEE80211_RADIOTAP_MCS_HAVE_GI |
pos[1] |= IEEE80211_RADIOTAP_MCS_FMT_GF;
pos[2] = info->status.rates[0].idx;
pos += 3;
- }
+ } else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) {
+ u16 known = local->hw.radiotap_vht_details &
+ (IEEE80211_RADIOTAP_VHT_KNOWN_GI |
+ IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH);
+
+ rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT);
+
+ /* required alignment from rthdr */
+ pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2);
+ /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */
+ put_unaligned_le16(known, pos);
+ pos += 2;
+
+ /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */
+ if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
+ *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI;
+ pos++;
+
+ /* u8 bandwidth */
+ if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
+ *pos = 1;
+ else if (info->status.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
+ *pos = 4;
+ else if (info->status.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
+ *pos = 11;
+ else /* IEEE80211_TX_RC_{20_MHZ_WIDTH,FIXME:DUP_DATA} */
+ *pos = 0;
+ pos++;
+
+ /* u8 mcs_nss[4] */
+ *pos = (ieee80211_rate_get_vht_mcs(&info->status.rates[0]) << 4) |
+ ieee80211_rate_get_vht_nss(&info->status.rates[0]);
+ pos += 4;
+
+ /* u8 coding */
+ pos++;
+ /* u8 group_id */
+ pos++;
+ /* u16 partial_aid */
+ pos += 2;
+ }
}
static void ieee80211_report_used_skb(struct ieee80211_local *local,
rcu_read_unlock();
- ieee80211_led_tx(local, 0);
+ ieee80211_led_tx(local);
/* SNMP counters
* Fragments are passed to low-level drivers as separate skbs, so these
dev_kfree_skb(skb);
return;
}
- ieee80211_add_tx_radiotap_header(sband, skb, retry_count, rtap_len,
- shift);
+ ieee80211_add_tx_radiotap_header(local, sband, skb, retry_count,
+ rtap_len, shift);
/* XXX: is this sufficient for BPF? */
skb_set_mac_header(skb, 0);
)
);
+TRACE_EVENT(drv_channel_switch_beacon,
+ TP_PROTO(struct ieee80211_local *local,
+ struct ieee80211_sub_if_data *sdata,
+ struct cfg80211_chan_def *chandef),
+
+ TP_ARGS(local, sdata, chandef),
+
+ TP_STRUCT__entry(
+ LOCAL_ENTRY
+ VIF_ENTRY
+ CHANDEF_ENTRY
+ ),
+
+ TP_fast_assign(
+ LOCAL_ASSIGN;
+ VIF_ASSIGN;
+ CHANDEF_ASSIGN(chandef);
+ ),
+
+ TP_printk(
+ LOCAL_PR_FMT VIF_PR_FMT " channel switch to " CHANDEF_PR_FMT,
+ LOCAL_PR_ARG, VIF_PR_ARG, CHANDEF_PR_ARG
+ )
+);
+
+
#ifdef CONFIG_MAC80211_MESSAGE_TRACING
#undef TRACE_SYSTEM
#define TRACE_SYSTEM mac80211_msg
txpending);
ieee80211_tpt_led_trig_tx(local, fc, led_len);
- ieee80211_led_tx(local, 1);
WARN_ON_ONCE(!skb_queue_empty(skbs));
return 0;
}
+void ieee80211_csa_finish(struct ieee80211_vif *vif)
+{
+ struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+
+ ieee80211_queue_work(&sdata->local->hw,
+ &sdata->csa_finalize_work);
+}
+EXPORT_SYMBOL(ieee80211_csa_finish);
+
+static void ieee80211_update_csa(struct ieee80211_sub_if_data *sdata,
+ struct beacon_data *beacon)
+{
+ struct probe_resp *resp;
+ int counter_offset_beacon = sdata->csa_counter_offset_beacon;
+ int counter_offset_presp = sdata->csa_counter_offset_presp;
+
+ /* warn if the driver did not check for/react to csa completeness */
+ if (WARN_ON(((u8 *)beacon->tail)[counter_offset_beacon] == 0))
+ return;
+
+ ((u8 *)beacon->tail)[counter_offset_beacon]--;
+
+ if (sdata->vif.type == NL80211_IFTYPE_AP &&
+ counter_offset_presp) {
+ rcu_read_lock();
+ resp = rcu_dereference(sdata->u.ap.probe_resp);
+
+ /* if nl80211 accepted the offset, this should not happen. */
+ if (WARN_ON(!resp)) {
+ rcu_read_unlock();
+ return;
+ }
+ resp->data[counter_offset_presp]--;
+ rcu_read_unlock();
+ }
+}
+
+bool ieee80211_csa_is_complete(struct ieee80211_vif *vif)
+{
+ struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+ struct beacon_data *beacon = NULL;
+ u8 *beacon_data;
+ size_t beacon_data_len;
+ int counter_beacon = sdata->csa_counter_offset_beacon;
+ int ret = false;
+
+ if (!ieee80211_sdata_running(sdata))
+ return false;
+
+ rcu_read_lock();
+ if (vif->type == NL80211_IFTYPE_AP) {
+ struct ieee80211_if_ap *ap = &sdata->u.ap;
+
+ beacon = rcu_dereference(ap->beacon);
+ if (WARN_ON(!beacon || !beacon->tail))
+ goto out;
+ beacon_data = beacon->tail;
+ beacon_data_len = beacon->tail_len;
+ } else {
+ WARN_ON(1);
+ goto out;
+ }
+
+ if (WARN_ON(counter_beacon > beacon_data_len))
+ goto out;
+
+ if (beacon_data[counter_beacon] == 0)
+ ret = true;
+ out:
+ rcu_read_unlock();
+
+ return ret;
+}
+EXPORT_SYMBOL(ieee80211_csa_is_complete);
+
struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
u16 *tim_offset, u16 *tim_length)
struct beacon_data *beacon = rcu_dereference(ap->beacon);
if (beacon) {
+ if (sdata->vif.csa_active)
+ ieee80211_update_csa(sdata, beacon);
+
/*
* headroom, head length,
* tail length and maximum TIM length
[NL80211_ATTR_IE_RIC] = { .type = NLA_BINARY,
.len = IEEE80211_MAX_DATA_LEN },
[NL80211_ATTR_PEER_AID] = { .type = NLA_U16 },
+ [NL80211_ATTR_CH_SWITCH_COUNT] = { .type = NLA_U32 },
+ [NL80211_ATTR_CH_SWITCH_BLOCK_TX] = { .type = NLA_FLAG },
+ [NL80211_ATTR_CSA_IES] = { .type = NLA_NESTED },
+ [NL80211_ATTR_CSA_C_OFF_BEACON] = { .type = NLA_U16 },
+ [NL80211_ATTR_CSA_C_OFF_PRESP] = { .type = NLA_U16 },
};
/* policy for the key attributes */
if (state->split) {
CMD(crit_proto_start, CRIT_PROTOCOL_START);
CMD(crit_proto_stop, CRIT_PROTOCOL_STOP);
+ if (dev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH)
+ CMD(channel_switch, CHANNEL_SWITCH);
}
#ifdef CONFIG_NL80211_TESTMODE
return err;
}
+static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info)
+{
+ struct cfg80211_registered_device *rdev = info->user_ptr[0];
+ struct net_device *dev = info->user_ptr[1];
+ struct wireless_dev *wdev = dev->ieee80211_ptr;
+ struct cfg80211_csa_settings params;
+ /* csa_attrs is defined static to avoid waste of stack size - this
+ * function is called under RTNL lock, so this should not be a problem.
+ */
+ static struct nlattr *csa_attrs[NL80211_ATTR_MAX+1];
+ u8 radar_detect_width = 0;
+ int err;
+
+ if (!rdev->ops->channel_switch ||
+ !(rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH))
+ return -EOPNOTSUPP;
+
+ /* may add IBSS support later */
+ if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
+ dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
+ return -EOPNOTSUPP;
+
+ memset(¶ms, 0, sizeof(params));
+
+ if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
+ !info->attrs[NL80211_ATTR_CH_SWITCH_COUNT])
+ return -EINVAL;
+
+ /* only important for AP, IBSS and mesh create IEs internally */
+ if (!info->attrs[NL80211_ATTR_CSA_IES])
+ return -EINVAL;
+
+ /* useless if AP is not running */
+ if (!wdev->beacon_interval)
+ return -EINVAL;
+
+ params.count = nla_get_u32(info->attrs[NL80211_ATTR_CH_SWITCH_COUNT]);
+
+ err = nl80211_parse_beacon(info->attrs, ¶ms.beacon_after);
+ if (err)
+ return err;
+
+ err = nla_parse_nested(csa_attrs, NL80211_ATTR_MAX,
+ info->attrs[NL80211_ATTR_CSA_IES],
+ nl80211_policy);
+ if (err)
+ return err;
+
+ err = nl80211_parse_beacon(csa_attrs, ¶ms.beacon_csa);
+ if (err)
+ return err;
+
+ if (!csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON])
+ return -EINVAL;
+
+ params.counter_offset_beacon =
+ nla_get_u16(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
+ if (params.counter_offset_beacon >= params.beacon_csa.tail_len)
+ return -EINVAL;
+
+ /* sanity check - counters should be the same */
+ if (params.beacon_csa.tail[params.counter_offset_beacon] !=
+ params.count)
+ return -EINVAL;
+
+ if (csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]) {
+ params.counter_offset_presp =
+ nla_get_u16(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
+ if (params.counter_offset_presp >=
+ params.beacon_csa.probe_resp_len)
+ return -EINVAL;
+
+ if (params.beacon_csa.probe_resp[params.counter_offset_presp] !=
+ params.count)
+ return -EINVAL;
+ }
+
+ err = nl80211_parse_chandef(rdev, info, ¶ms.chandef);
+ if (err)
+ return err;
+
+ if (!cfg80211_reg_can_beacon(&rdev->wiphy, ¶ms.chandef))
+ return -EINVAL;
+
+ err = cfg80211_chandef_dfs_required(wdev->wiphy, ¶ms.chandef);
+ if (err < 0) {
+ return err;
+ } else if (err) {
+ radar_detect_width = BIT(params.chandef.width);
+ params.radar_required = true;
+ }
+
+ err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
+ params.chandef.chan,
+ CHAN_MODE_SHARED,
+ radar_detect_width);
+ if (err)
+ return err;
+
+ if (info->attrs[NL80211_ATTR_CH_SWITCH_BLOCK_TX])
+ params.block_tx = true;
+
+ return rdev_channel_switch(rdev, dev, ¶ms);
+}
+
static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
u32 seq, int flags,
struct cfg80211_registered_device *rdev,
.flags = GENL_ADMIN_PERM,
.internal_flags = NL80211_FLAG_NEED_WIPHY |
NL80211_FLAG_NEED_RTNL,
- }
+ },
+ {
+ .cmd = NL80211_CMD_CHANNEL_SWITCH,
+ .doit = nl80211_channel_switch,
+ .policy = nl80211_policy,
+ .flags = GENL_ADMIN_PERM,
+ .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
+ NL80211_FLAG_NEED_RTNL,
+ },
};
static struct genl_multicast_group nl80211_mlme_mcgrp = {
trace_rdev_return_void(&rdev->wiphy);
}
+static inline int rdev_channel_switch(struct cfg80211_registered_device *rdev,
+ struct net_device *dev,
+ struct cfg80211_csa_settings *params)
+{
+ int ret;
+
+ trace_rdev_channel_switch(&rdev->wiphy, dev, params);
+ ret = rdev->ops->channel_switch(&rdev->wiphy, dev, params);
+ trace_rdev_return_int(&rdev->wiphy, ret);
+ return ret;
+}
+
#endif /* __CFG80211_RDEV_OPS */
WIPHY_PR_ARG, WDEV_PR_ARG)
);
+TRACE_EVENT(rdev_channel_switch,
+ TP_PROTO(struct wiphy *wiphy, struct net_device *netdev,
+ struct cfg80211_csa_settings *params),
+ TP_ARGS(wiphy, netdev, params),
+ TP_STRUCT__entry(
+ WIPHY_ENTRY
+ NETDEV_ENTRY
+ CHAN_DEF_ENTRY
+ __field(u16, counter_offset_beacon)
+ __field(u16, counter_offset_presp)
+ __field(bool, radar_required)
+ __field(bool, block_tx)
+ __field(u8, count)
+ ),
+ TP_fast_assign(
+ WIPHY_ASSIGN;
+ NETDEV_ASSIGN;
+ CHAN_DEF_ASSIGN(¶ms->chandef);
+ __entry->counter_offset_beacon = params->counter_offset_beacon;
+ __entry->counter_offset_presp = params->counter_offset_presp;
+ __entry->radar_required = params->radar_required;
+ __entry->block_tx = params->block_tx;
+ __entry->count = params->count;
+ ),
+ TP_printk(WIPHY_PR_FMT ", " NETDEV_PR_FMT ", " CHAN_DEF_PR_FMT
+ ", block_tx: %d, count: %u, radar_required: %d"
+ ", counter offsets (beacon/presp): %u/%u",
+ WIPHY_PR_ARG, NETDEV_PR_ARG, CHAN_DEF_PR_ARG,
+ __entry->block_tx, __entry->count, __entry->radar_required,
+ __entry->counter_offset_beacon,
+ __entry->counter_offset_presp)
+);
+
/*************************************************************
* cfg80211 exported functions traces *
*************************************************************/
projects / ~andy / linux / commitdiff