Merge branch 'for-john' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next

4 files changed, 109 insertions, 0 deletions

diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h
index b0dc87a2a376..b3ce299782af 100644
--- a/include/linux/ieee80211.h
+++ b/include/linux/ieee80211.h
@@ -1709,6 +1709,10 @@ enum ieee80211_eid {
         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,
@@ -1860,6 +1864,11 @@ enum ieee80211_tdls_actioncode {
         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
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index aeaf6dff6e05..b7495c72061c 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -666,6 +666,30 @@ struct cfg80211_ap_settings {
 };
 
 /**
+ * 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)
  * @STATION_PARAM_APPLY_CAPABILITY: apply new capability
@@ -2139,6 +2163,8 @@ struct cfg80211_update_ft_ies_params {
  * @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);
@@ -2376,6 +2402,10 @@ struct cfg80211_ops {
                                    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);
 };
 
 /*
@@ -2441,6 +2471,8 @@ struct cfg80211_ops {
  * @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),
@@ -2465,6 +2497,7 @@ enum wiphy_flags {
         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),
 };
 
 /**
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 3124036285eb..9cda3728c2cb 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -152,11 +152,14 @@ struct ieee80211_low_level_stats {
  * @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),
 };
 
 /**
@@ -1084,6 +1087,7 @@ enum ieee80211_vif_flags {
  * @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
@@ -1106,6 +1110,7 @@ struct ieee80211_vif {
         struct ieee80211_bss_conf bss_conf;
         u8 addr[ETH_ALEN];
         bool p2p;
+        bool csa_active;
 
         u8 cab_queue;
         u8 hw_queue[IEEE80211_NUM_ACS];
@@ -2637,6 +2642,16 @@ enum ieee80211_roc_type {
  * @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,
@@ -2824,6 +2839,9 @@ struct ieee80211_ops {
                                  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);
 };
 
 /**
@@ -3319,6 +3337,25 @@ static inline struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw,
 }
 
 /**
+ * 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().
  * @vif: &struct ieee80211_vif pointer from the add_interface callback.
diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
index eb68735b3318..1f42bc3dcb9c 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -676,6 +676,16 @@
  * @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
  */
@@ -841,6 +851,8 @@ enum nl80211_commands {
         NL80211_CMD_GET_COALESCE,
         NL80211_CMD_SET_COALESCE,
 
+        NL80211_CMD_CHANNEL_SWITCH,
+
         /* add new commands above here */
 
         /* used to define NL80211_CMD_MAX below */
@@ -1469,6 +1481,18 @@ enum nl80211_commands {
  *
  * @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
  */
@@ -1771,6 +1795,12 @@ enum nl80211_attrs {
 
         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,