wifi: mac80211: Add support for EPCS configuration

Add support for configuring EPCS state:

- When EPCS is enabled, send an EPCS enable request action frame
  to the AP. When the AP replies with EPCS enable response, enable
  EPCS by applying the QoS parameters provided by the AP. Do so for
  all the valid MLD links. Once EPCS is enabled, support processing
  of unsolicited EPCS enable response frames.
- When EPCS is disabled, send an EPCS teardown request to the AP
  and apply the QoS parameters as obtained from the last received
  beacons. Do so for all the valid links.

Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20250205110958.7a90afd7e140.I3f602d65f5c1fd849d6c70b12307dda33aa91ccb@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h
index 16741e542e81..8f35a3a5211c 100644
--- a/include/linux/ieee80211.h
+++ b/include/linux/ieee80211.h
@@ -1543,6 +1543,10 @@ struct ieee80211_mgmt {
 					u8 count;
 					u8 variable[];
 				} __packed ml_reconf_resp;
+				struct {
+					u8 action_code;
+					u8 variable[];
+				} __packed epcs;
 			} u;
 		} __packed action;
 		DECLARE_FLEX_ARRAY(u8, body); /* Generic frame body */
@@ -5570,6 +5574,9 @@ static inline bool ieee80211_mle_reconf_sta_prof_size_ok(const u8 *data,
 	       fixed + prof->sta_info_len - 1 <= len;
 }
 
+#define IEEE80211_MLE_STA_EPCS_CONTROL_LINK_ID			0x000f
+#define IEEE80211_EPCS_ENA_RESP_BODY_LEN                        3
+
 static inline bool ieee80211_tid_to_link_map_size_ok(const u8 *data, size_t len)
 {
 	const struct ieee80211_ttlm_elem *t2l = (const void *)data;