Merge tag 'mac80211-next-for-net-next-2021-08-20' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next

Johannes Berg says:

====================
Minor updates:
 * BSS coloring support
 * MEI commands for Intel platforms
 * various fixes/cleanups

* tag 'mac80211-next-for-net-next-2021-08-20' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next:
  cfg80211: fix BSS color notify trace enum confusion
  mac80211: Fix insufficient headroom issue for AMSDU
  mac80211: add support for BSS color change
  nl80211: add support for BSS coloring
  mac80211: Use flex-array for radiotap header bitmap
  mac80211: radiotap: Use BIT() instead of shifts
  mac80211: Remove unnecessary variable and label
  mac80211: include <linux/rbtree.h>
  mac80211: Fix monitor MTU limit so that A-MSDUs get through
  mac80211: remove unnecessary NULL check in ieee80211_register_hw()
  mac80211: Reject zero MAC address in sta_info_insert_check()
  nl80211: vendor-cmd: add Intel vendor commands for iwlmei usage
====================

Link: https://lore.kernel.org/r/20210820105329.48674-1-johannes@sipsolutions.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

3 files changed, 126 insertions, 0 deletions

diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 161cdf7df1a0..62dd8422e0dc 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -1253,6 +1253,27 @@ struct cfg80211_csa_settings {
 };
 
 /**
+ * struct cfg80211_color_change_settings - color change settings
+ *
+ * Used for bss color change
+ *
+ * @beacon_color_change: beacon data while performing the color countdown
+ * @counter_offsets_beacon: offsets of the counters within the beacon (tail)
+ * @counter_offsets_presp: offsets of the counters within the probe response
+ * @beacon_next: beacon data to be used after the color change
+ * @count: number of beacons until the color change
+ * @color: the color used after the change
+ */
+struct cfg80211_color_change_settings {
+	struct cfg80211_beacon_data beacon_color_change;
+	u16 counter_offset_beacon;
+	u16 counter_offset_presp;
+	struct cfg80211_beacon_data beacon_next;
+	u8 count;
+	u8 color;
+};
+
+/**
  * struct iface_combination_params - input parameters for interface combinations
  *
  * Used to pass interface combination parameters
@@ -3995,6 +4016,8 @@ struct mgmt_frame_regs {
  *	given TIDs. This callback may sleep.
  *
  * @set_sar_specs: Update the SAR (TX power) settings.
+ *
+ * @color_change: Initiate a color change.
  */
 struct cfg80211_ops {
 	int	(*suspend)(struct wiphy *wiphy, struct cfg80211_wowlan *wow);
@@ -4322,6 +4345,9 @@ struct cfg80211_ops {
 				    const u8 *peer, u8 tids);
 	int	(*set_sar_specs)(struct wiphy *wiphy,
 				 struct cfg80211_sar_specs *sar);
+	int	(*color_change)(struct wiphy *wiphy,
+				struct net_device *dev,
+				struct cfg80211_color_change_settings *params);
 };
 
 /*
@@ -8218,4 +8244,70 @@ void cfg80211_update_owe_info_event(struct net_device *netdev,
  */
 void cfg80211_bss_flush(struct wiphy *wiphy);
 
+/**
+ * cfg80211_bss_color_notify - notify about bss color event
+ * @dev: network device
+ * @gfp: allocation flags
+ * @cmd: the actual event we want to notify
+ * @count: the number of TBTTs until the color change happens
+ * @color_bitmap: representations of the colors that the local BSS is aware of
+ */
+int cfg80211_bss_color_notify(struct net_device *dev, gfp_t gfp,
+			      enum nl80211_commands cmd, u8 count,
+			      u64 color_bitmap);
+
+/**
+ * cfg80211_obss_color_collision_notify - notify about bss color collision
+ * @dev: network device
+ * @color_bitmap: representations of the colors that the local BSS is aware of
+ */
+static inline int cfg80211_obss_color_collision_notify(struct net_device *dev,
+						       u64 color_bitmap)
+{
+	return cfg80211_bss_color_notify(dev, GFP_KERNEL,
+					 NL80211_CMD_OBSS_COLOR_COLLISION,
+					 0, color_bitmap);
+}
+
+/**
+ * cfg80211_color_change_started_notify - notify color change start
+ * @dev: the device on which the color is switched
+ * @count: the number of TBTTs until the color change happens
+ *
+ * Inform the userspace about the color change that has started.
+ */
+static inline int cfg80211_color_change_started_notify(struct net_device *dev,
+						       u8 count)
+{
+	return cfg80211_bss_color_notify(dev, GFP_KERNEL,
+					 NL80211_CMD_COLOR_CHANGE_STARTED,
+					 count, 0);
+}
+
+/**
+ * cfg80211_color_change_aborted_notify - notify color change abort
+ * @dev: the device on which the color is switched
+ *
+ * Inform the userspace about the color change that has aborted.
+ */
+static inline int cfg80211_color_change_aborted_notify(struct net_device *dev)
+{
+	return cfg80211_bss_color_notify(dev, GFP_KERNEL,
+					 NL80211_CMD_COLOR_CHANGE_ABORTED,
+					 0, 0);
+}
+
+/**
+ * cfg80211_color_change_notify - notify color change completion
+ * @dev: the device on which the color was switched
+ *
+ * Inform the userspace about the color change that has completed.
+ */
+static inline int cfg80211_color_change_notify(struct net_device *dev)
+{
+	return cfg80211_bss_color_notify(dev, GFP_KERNEL,
+					 NL80211_CMD_COLOR_CHANGE_COMPLETED,
+					 0, 0);
+}
+
 #endif /* __NET_CFG80211_H */
diff --git a/include/net/ieee80211_radiotap.h b/include/net/ieee80211_radiotap.h
index c0854933e24f..11630351c978 100644
--- a/include/net/ieee80211_radiotap.h
+++ b/include/net/ieee80211_radiotap.h
@@ -43,6 +43,11 @@ struct ieee80211_radiotap_header {
 	 * @it_present: (first) present word
 	 */
 	__le32 it_present;
+
+	/**
+	 * @it_optional: all remaining presence bitmaps
+	 */
+	__le32 it_optional[];
 } __packed;
 
 /* version is always 0 */
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index d8a1d09a2141..a23e6734d26b 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -1711,6 +1711,10 @@ enum ieee80211_offload_flags {
  *	protected by fq->lock.
  * @offload_flags: 802.3 -> 802.11 enapsulation offload flags, see
  *	&enum ieee80211_offload_flags.
+ * @color_change_active: marks whether a color change is ongoing. Internally it is
+ *	write-protected by sdata_lock and local->mtx so holding either is fine
+ *	for read access.
+ * @color_change_color: the bss color that will be used after the change.
  */
 struct ieee80211_vif {
 	enum nl80211_iftype type;
@@ -1739,6 +1743,9 @@ struct ieee80211_vif {
 
 	bool txqs_stopped[IEEE80211_NUM_ACS];
 
+	bool color_change_active;
+	u8 color_change_color;
+
 	/* must be last */
 	u8 drv_priv[] __aligned(sizeof(void *));
 };
@@ -5008,6 +5015,16 @@ void ieee80211_csa_finish(struct ieee80211_vif *vif);
 bool ieee80211_beacon_cntdwn_is_complete(struct ieee80211_vif *vif);
 
 /**
+ * ieee80211_color_change_finish - notify mac80211 about color change
+ * @vif: &struct ieee80211_vif pointer from the add_interface callback.
+ *
+ * After a color change announcement was scheduled and the counter in this
+ * announcement hits 1, this function must be called by the driver to
+ * notify mac80211 that the color can be changed
+ */
+void ieee80211_color_change_finish(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.
@@ -6772,6 +6789,18 @@ ieee80211_get_unsol_bcast_probe_resp_tmpl(struct ieee80211_hw *hw,
 					  struct ieee80211_vif *vif);
 
 /**
+ * ieeee80211_obss_color_collision_notify - notify userland about a BSS color
+ * collision.
+ *
+ * @vif: &struct ieee80211_vif pointer from the add_interface callback.
+ * @color_bitmap: a 64 bit bitmap representing the colors that the local BSS is
+ *	aware of.
+ */
+void
+ieeee80211_obss_color_collision_notify(struct ieee80211_vif *vif,
+				       u64 color_bitmap);
+
+/**
  * ieee80211_is_tx_data - check if frame is a data frame
  *
  * The function is used to check if a frame is a data frame. Frames with