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[wireless-next,v5,1/4] wifi: cfg80211: Add support to get EMLSR capabilities of non-AP MLD

Message ID 20250327051320.3253783-2-quic_ramess@quicinc.com
State New
Headers show
Series wifi: cfg80211: update EML capabilities of an ML Station | expand

Commit Message

Rameshkumar Sundaram March 27, 2025, 5:13 a.m. UTC 
From: Ramasamy Kaliappan <quic_rkaliapp@quicinc.com>

The Enhanced multi-link single-radio (EMLSR) operation allows a non-AP MLD
with multiple receive chains to listen on one or more EMLSR links when the
corresponding non-AP STA(s) affiliated with the non-AP MLD is (are) in
the awake state. [IEEE 802.11be-2024, (35.3.17 Enhanced multi-link
single-radio (EMLSR) operation)]

An MLD which intends to enable EMLSR operations will set the EML
Capabilities Present subfield to 1 and shall set the EMLSR Support
subfield in the Common Info field of the Basic Multi-Link element to 1 in
all Management frames that include the Basic Multi-Link element except
Authentication frames. EML capabilities contains information such as
EML Transition timeout, Padding delay and Transition delay. These fields
needs to updated to drivers to trigger EMLSR operation and to transmit and
receive initial control frame and data frames.

Add support to receive EML Capabilities subfield that non-AP MLD
advertises during (re)association request and send it to underlying
drivers during ADD/SET station.

Signed-off-by: Ramasamy Kaliappan <quic_rkaliapp@quicinc.com>
Signed-off-by: Rameshkumar Sundaram <quic_ramess@quicinc.com>
---
 include/net/cfg80211.h |  5 +++++
 net/wireless/nl80211.c | 17 +++++++++++++++++
 2 files changed, 22 insertions(+)
diff mbox series

Patch

diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index efbd79c67be2..b9032649b081 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -1770,6 +1770,9 @@  struct cfg80211_ttlm_params {
  * @supported_oper_classes_len: number of supported operating classes
  * @support_p2p_ps: information if station supports P2P PS mechanism
  * @airtime_weight: airtime scheduler weight for this station
+ * @eml_cap_present: Specifies if EML capabilities field (@eml_cap) is
+ *	present/updated
+ * @eml_cap: EML capabilities of this station
  * @link_sta_params: link related params.
  */
 struct station_parameters {
@@ -1794,6 +1797,8 @@  struct station_parameters {
 	u8 supported_oper_classes_len;
 	int support_p2p_ps;
 	u16 airtime_weight;
+	bool eml_cap_present;
+	u16 eml_cap;
 	struct link_station_parameters link_sta_params;
 };
 
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index f039a7d0d6f7..e1c1c06ebbb4 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -833,6 +833,7 @@  static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
 	[NL80211_ATTR_MLD_ADDR] = NLA_POLICY_EXACT_LEN(ETH_ALEN),
 	[NL80211_ATTR_MLO_SUPPORT] = { .type = NLA_FLAG },
 	[NL80211_ATTR_MAX_NUM_AKM_SUITES] = { .type = NLA_REJECT },
+	[NL80211_ATTR_EML_CAPABILITY] = { .type = NLA_U16 },
 	[NL80211_ATTR_PUNCT_BITMAP] =
 		NLA_POLICY_FULL_RANGE(NLA_U32, &nl80211_punct_bitmap_range),
 
@@ -7118,6 +7119,10 @@  int cfg80211_check_station_change(struct wiphy *wiphy,
 			return -EINVAL;
 	}
 
+	/* Reject EMLSR capabilities change after association */
+	if (statype == CFG80211_STA_AP_CLIENT && params->eml_cap_present)
+		return -EINVAL;
+
 	switch (statype) {
 	case CFG80211_STA_AP_MLME_CLIENT:
 		/* Use this only for authorizing/unauthorizing a station */
@@ -7473,6 +7478,12 @@  static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
 		params.link_sta_params.he_6ghz_capa =
 			nla_data(info->attrs[NL80211_ATTR_HE_6GHZ_CAPABILITY]);
 
+	if (info->attrs[NL80211_ATTR_EML_CAPABILITY]) {
+		params.eml_cap_present = true;
+		params.eml_cap =
+			nla_get_u16(info->attrs[NL80211_ATTR_EML_CAPABILITY]);
+	}
+
 	if (info->attrs[NL80211_ATTR_AIRTIME_WEIGHT])
 		params.airtime_weight =
 			nla_get_u16(info->attrs[NL80211_ATTR_AIRTIME_WEIGHT]);
@@ -7631,6 +7642,12 @@  static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
 		}
 	}
 
+	if (info->attrs[NL80211_ATTR_EML_CAPABILITY]) {
+		params.eml_cap_present = true;
+		params.eml_cap =
+			nla_get_u16(info->attrs[NL80211_ATTR_EML_CAPABILITY]);
+	}
+
 	if (info->attrs[NL80211_ATTR_HE_6GHZ_CAPABILITY])
 		params.link_sta_params.he_6ghz_capa =
 			nla_data(info->attrs[NL80211_ATTR_HE_6GHZ_CAPABILITY]);