nl80211: add support for BSS coloring

This patch adds support for BSS color collisions to the wireless subsystem.
Add the required functionality to nl80211 that will notify about color
collisions, triggering the color change and notifying when it is completed.

Co-developed-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: John Crispin <john@phrozen.org>
Link: https://lore.kernel.org/r/500b3582aec8fe2c42ef46f3117b148cb7cbceb5.1625247619.git.lorenzo@kernel.org
[remove unnecessary NULL initialisation]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 43 insertions, 0 deletions

diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
index db474994fa73..c2efea98e060 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -1185,6 +1185,21 @@
  *	passed using %NL80211_ATTR_SAR_SPEC. %NL80211_ATTR_WIPHY is used to
  *	specify the wiphy index to be applied to.
  *
+ * @NL80211_CMD_OBSS_COLOR_COLLISION: This notification is sent out whenever
+ *	mac80211/drv detects a bss color collision.
+ *
+ * @NL80211_CMD_COLOR_CHANGE_REQUEST: This command is used to indicate that
+ *	userspace wants to change the BSS color.
+ *
+ * @NL80211_CMD_COLOR_CHANGE_STARTED: Notify userland, that a color change has
+ *	started
+ *
+ * @NL80211_CMD_COLOR_CHANGE_ABORTED: Notify userland, that the color change has
+ *	been aborted
+ *
+ * @NL80211_CMD_COLOR_CHANGE_COMPLETED: Notify userland that the color change
+ *	has completed
+ *
  * @NL80211_CMD_MAX: highest used command number
  * @__NL80211_CMD_AFTER_LAST: internal use
  */
@@ -1417,6 +1432,14 @@ enum nl80211_commands {
 
 	NL80211_CMD_SET_SAR_SPECS,
 
+	NL80211_CMD_OBSS_COLOR_COLLISION,
+
+	NL80211_CMD_COLOR_CHANGE_REQUEST,
+
+	NL80211_CMD_COLOR_CHANGE_STARTED,
+	NL80211_CMD_COLOR_CHANGE_ABORTED,
+	NL80211_CMD_COLOR_CHANGE_COMPLETED,
+
 	/* add new commands above here */
 
 	/* used to define NL80211_CMD_MAX below */
@@ -2560,6 +2583,16 @@ enum nl80211_commands {
  *	disassoc events to indicate that an immediate reconnect to the AP
  *	is desired.
  *
+ * @NL80211_ATTR_OBSS_COLOR_BITMAP: bitmap of the u64 BSS colors for the
+ *	%NL80211_CMD_OBSS_COLOR_COLLISION event.
+ *
+ * @NL80211_ATTR_COLOR_CHANGE_COUNT: u8 attribute specifying the number of TBTT's
+ *	until the color switch event.
+ * @NL80211_ATTR_COLOR_CHANGE_COLOR: u8 attribute specifying the color that we are
+ *	switching to
+ * @NL80211_ATTR_COLOR_CHANGE_ELEMS: Nested set of attributes containing the IE
+ *	information for the time while performing a color switch.
+ *
  * @NUM_NL80211_ATTR: total number of nl80211_attrs available
  * @NL80211_ATTR_MAX: highest attribute number currently defined
  * @__NL80211_ATTR_AFTER_LAST: internal use
@@ -3057,6 +3090,12 @@ enum nl80211_attrs {
 
 	NL80211_ATTR_DISABLE_HE,
 
+	NL80211_ATTR_OBSS_COLOR_BITMAP,
+
+	NL80211_ATTR_COLOR_CHANGE_COUNT,
+	NL80211_ATTR_COLOR_CHANGE_COLOR,
+	NL80211_ATTR_COLOR_CHANGE_ELEMS,
+
 	/* add attributes here, update the policy in nl80211.c */
 
 	__NL80211_ATTR_AFTER_LAST,
@@ -5953,6 +5992,9 @@ enum nl80211_feature_flags {
  *      frame protection for all management frames exchanged during the
  *      negotiation and range measurement procedure.
  *
+ * @NL80211_EXT_FEATURE_BSS_COLOR: The driver supports BSS color collision
+ *	detection and change announcemnts.
+ *
  * @NUM_NL80211_EXT_FEATURES: number of extended features.
  * @MAX_NL80211_EXT_FEATURES: highest extended feature index.
  */
@@ -6017,6 +6059,7 @@ enum nl80211_ext_feature_index {
 	NL80211_EXT_FEATURE_SECURE_LTF,
 	NL80211_EXT_FEATURE_SECURE_RTT,
 	NL80211_EXT_FEATURE_PROT_RANGE_NEGO_AND_MEASURE,
+	NL80211_EXT_FEATURE_BSS_COLOR,
 
 	/* add new features before the definition below */
 	NUM_NL80211_EXT_FEATURES,