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From:   Johannes Berg <johannes@sipsolutions.net>
To:     linux-wireless@vger.kernel.org
Cc:     Veerendranath Jakkam <quic_vjakkam@quicinc.com>,
        Ilan Peer <ilan.peer@intel.com>,
        Jia Ding <quic_jiad@quicinc.com>,
        Mordechay Goodstein <mordechay.goodstein@intel.com>,
        Sriram R <quic_srirrama@quicinc.com>
Subject: [PATCH 06/19] cfg80211: Add data structures to capture EHT capabilities
Date:   Fri,  4 Feb 2022 23:02:42 +0100
Message-Id: <20220204230119.b0eeb527d761.I2413a37c8f7d2d6d638038a3d95360a3fce0114d@changeid>
In-Reply-To: <20220204220255.448224-1-johannes@sipsolutions.net>
References: <20220204220255.448224-1-johannes@sipsolutions.net>
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From: Ilan Peer <ilan.peer@intel.com>

And advertise EHT capabilities to user space when supported.

Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---
 include/net/cfg80211.h       | 41 ++++++++++++++++++++++++++++++++++++
 include/uapi/linux/nl80211.h | 12 +++++++++++
 net/wireless/nl80211.c       | 17 +++++++++++++++
 3 files changed, 70 insertions(+)

diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index f6db085ff3df..a9098839301f 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -360,6 +360,26 @@ struct ieee80211_sta_he_cap {
 	u8 ppe_thres[IEEE80211_HE_PPE_THRES_MAX_LEN];
 };
 
+#define IEEE80211_EHT_PPE_THRES_MAX_LEN		32
+
+/**
+ * struct ieee80211_sta_eht_cap - STA's EHT capabilities
+ *
+ * This structure describes most essential parameters needed
+ * to describe 802.11be EHT capabilities for a STA.
+ *
+ * @has_he: true iff HE data is valid.
+ * @eht_cap_elem: Fixed portion of the eht capabilities element.
+ * @eht_mcs_nss_supp: The supported NSS/MCS combinations.
+ * @eht_ppe_thres: Holds the PPE Thresholds data.
+ */
+struct ieee80211_sta_eht_cap {
+	bool has_eht;
+	struct ieee80211_eht_cap_elem_fixed eht_cap_elem;
+	struct ieee80211_eht_mcs_nss_supp eht_mcs_nss_supp;
+	u8 eht_ppe_thres[IEEE80211_EHT_PPE_THRES_MAX_LEN];
+};
+
 /**
  * struct ieee80211_sband_iftype_data - sband data per interface type
  *
@@ -379,6 +399,7 @@ struct ieee80211_sband_iftype_data {
 	u16 types_mask;
 	struct ieee80211_sta_he_cap he_cap;
 	struct ieee80211_he_6ghz_capa he_6ghz_capa;
+	struct ieee80211_sta_eht_cap eht_cap;
 	struct {
 		const u8 *data;
 		unsigned int len;
@@ -561,6 +582,26 @@ ieee80211_get_he_6ghz_capa(const struct ieee80211_supported_band *sband,
 	return data->he_6ghz_capa.capa;
 }
 
+/**
+ * ieee80211_get_eht_iftype_cap - return ETH capabilities for an sband's iftype
+ * @sband: the sband to search for the iftype on
+ * @iftype: enum nl80211_iftype
+ *
+ * Return: pointer to the struct ieee80211_sta_eht_cap, or NULL is none found
+ */
+static inline const struct ieee80211_sta_eht_cap *
+ieee80211_get_eht_iftype_cap(const struct ieee80211_supported_band *sband,
+			     enum nl80211_iftype iftype)
+{
+	const struct ieee80211_sband_iftype_data *data =
+		ieee80211_get_sband_iftype_data(sband, iftype);
+
+	if (data && data->eht_cap.has_eht)
+		return &data->eht_cap;
+
+	return NULL;
+}
+
 /**
  * wiphy_read_of_freq_limits - read frequency limits from device tree
  *
diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
index 195a238a322e..373c6428023d 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -3766,6 +3766,14 @@ enum nl80211_mpath_info {
  *	given for all 6 GHz band channels
  * @NL80211_BAND_IFTYPE_ATTR_VENDOR_ELEMS: vendor element capabilities that are
  *	advertised on this band/for this iftype (binary)
+ * @NL80211_BAND_IFTYPE_ATTR_EHT_CAP_MAC: EHT MAC capabilities as in EHT
+ *     capabilities IE
+ * @NL80211_BAND_IFTYPE_ATTR_EHT_CAP_PHY: EHT PHY capabilities as in EHT
+ *     capabilities IE
+ * @NL80211_BAND_IFTYPE_ATTR_EHT_CAP_MCS_SET: EHT supported NSS/MCS as in EHT
+ *     capabilities IE
+ * @NL80211_BAND_IFTYPE_ATTR_EHT_CAP_PPE: EHT PPE thresholds information as
+ *     defined in EHT capabilities IE
  * @__NL80211_BAND_IFTYPE_ATTR_AFTER_LAST: internal use
  * @NL80211_BAND_IFTYPE_ATTR_MAX: highest band attribute currently defined
  */
@@ -3779,6 +3787,10 @@ enum nl80211_band_iftype_attr {
 	NL80211_BAND_IFTYPE_ATTR_HE_CAP_PPE,
 	NL80211_BAND_IFTYPE_ATTR_HE_6GHZ_CAPA,
 	NL80211_BAND_IFTYPE_ATTR_VENDOR_ELEMS,
+	NL80211_BAND_IFTYPE_ATTR_EHT_CAP_MAC,
+	NL80211_BAND_IFTYPE_ATTR_EHT_CAP_PHY,
+	NL80211_BAND_IFTYPE_ATTR_EHT_CAP_MCS_SET,
+	NL80211_BAND_IFTYPE_ATTR_EHT_CAP_PPE,
 
 	/* keep last */
 	__NL80211_BAND_IFTYPE_ATTR_AFTER_LAST,
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 578bff9c378b..dda9cca736d7 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -1729,6 +1729,7 @@ nl80211_send_iftype_data(struct sk_buff *msg,
 			 const struct ieee80211_sband_iftype_data *iftdata)
 {
 	const struct ieee80211_sta_he_cap *he_cap = &iftdata->he_cap;
+	const struct ieee80211_sta_eht_cap *eht_cap = &iftdata->eht_cap;
 
 	if (nl80211_put_iftypes(msg, NL80211_BAND_IFTYPE_ATTR_IFTYPES,
 				iftdata->types_mask))
@@ -1749,6 +1750,22 @@ nl80211_send_iftype_data(struct sk_buff *msg,
 			return -ENOBUFS;
 	}
 
+	if (eht_cap->has_eht) {
+		if (nla_put(msg, NL80211_BAND_IFTYPE_ATTR_EHT_CAP_MAC,
+			    sizeof(eht_cap->eht_cap_elem.mac_cap_info),
+			    eht_cap->eht_cap_elem.mac_cap_info) ||
+		    nla_put(msg, NL80211_BAND_IFTYPE_ATTR_EHT_CAP_PHY,
+			    sizeof(eht_cap->eht_cap_elem.phy_cap_info),
+			    eht_cap->eht_cap_elem.phy_cap_info) ||
+		    nla_put(msg, NL80211_BAND_IFTYPE_ATTR_EHT_CAP_MCS_SET,
+			    sizeof(eht_cap->eht_mcs_nss_supp),
+			    &eht_cap->eht_mcs_nss_supp) ||
+		    nla_put(msg, NL80211_BAND_IFTYPE_ATTR_EHT_CAP_PPE,
+			    sizeof(eht_cap->eht_ppe_thres),
+			    eht_cap->eht_ppe_thres))
+			return -ENOBUFS;
+	}
+
 	if (sband->band == NL80211_BAND_6GHZ &&
 	    nla_put(msg, NL80211_BAND_IFTYPE_ATTR_HE_6GHZ_CAPA,
 		    sizeof(iftdata->he_6ghz_capa),
-- 
2.34.1