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From:   Thomas Pedersen <thomas@adapt-ip.com>
To:     Johannes Berg <johannes@sipsolutions.net>
Cc:     linux-wireless <linux-wireless@vger.kernel.org>,
        Thomas Pedersen <thomas@adapt-ip.com>
Subject: [PATCH 09/22] mac80211: support S1G STA capabilities
Date:   Thu, 27 Aug 2020 15:32:51 -0700
Message-Id: <20200827223304.16155-10-thomas@adapt-ip.com>
In-Reply-To: <20200827223304.16155-1-thomas@adapt-ip.com>
References: <20200827223304.16155-1-thomas@adapt-ip.com>
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Sender: linux-wireless-owner@vger.kernel.org
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Include the S1G Capabilities element in an association
request, and support the cfg80211 capability overrides.

Signed-off-by: Thomas Pedersen <thomas@adapt-ip.com>
---
 net/mac80211/ieee80211_i.h |  4 ++++
 net/mac80211/mlme.c        |  8 +++++++
 net/mac80211/util.c        | 45 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 57 insertions(+)

diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 0b1eaec6649f..5da2713af500 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -530,6 +530,8 @@ struct ieee80211_if_managed {
 	struct ieee80211_ht_cap ht_capa_mask; /* Valid parts of ht_capa */
 	struct ieee80211_vht_cap vht_capa; /* configured VHT overrides */
 	struct ieee80211_vht_cap vht_capa_mask; /* Valid parts of vht_capa */
+	struct ieee80211_s1g_cap s1g_capa; /* configured S1G overrides */
+	struct ieee80211_s1g_cap s1g_capa_mask; /* valid s1g_capa bits */
 
 	/* TDLS support */
 	u8 tdls_peer[ETH_ALEN] __aligned(2);
@@ -2193,6 +2195,8 @@ int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
 				struct sk_buff *skb, bool need_basic,
 				enum nl80211_band band);
 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo);
+u8 *ieee80211_add_s1g_capab_ie(struct ieee80211_sub_if_data *sdata,
+			       struct ieee80211_sta_s1g_cap *caps, u8 *buf);
 
 /* channel management */
 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index ac870309b911..b69889563457 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -1018,6 +1018,10 @@ static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
 		pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
 	}
 
+	if (sband->band == NL80211_BAND_S1GHZ)
+		pos = ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap,
+						 skb_put(skb, 17));
+
 	/* add any remaining custom (i.e. vendor specific here) IEs */
 	if (assoc_data->ie_len) {
 		noffset = assoc_data->ie_len;
@@ -5461,6 +5465,10 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
 	memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
 	       sizeof(ifmgd->vht_capa_mask));
 
+	memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa));
+	memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask,
+	       sizeof(ifmgd->s1g_capa_mask));
+
 	if (req->ie && req->ie_len) {
 		memcpy(assoc_data->ie, req->ie, req->ie_len);
 		assoc_data->ie_len = req->ie_len;
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 35798997e521..c7ab7ab057f9 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -4278,6 +4278,51 @@ int ieee80211_max_num_channels(struct ieee80211_local *local)
 	return max_num_different_channels;
 }
 
+u8 *ieee80211_add_s1g_capab_ie(struct ieee80211_sub_if_data *sdata,
+			       struct ieee80211_sta_s1g_cap *own_cap, u8 *buf)
+{
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	struct ieee80211_s1g_cap s1g_capab;
+	u8 *pos = buf;
+	int i;
+
+	if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
+		return pos;
+
+	if (!own_cap->s1g)
+		return pos;
+
+	memcpy(s1g_capab.capab_info, own_cap->cap, sizeof(own_cap->cap));
+	memcpy(s1g_capab.supp_mcs_nss, own_cap->nss_mcs,
+	       sizeof(own_cap->nss_mcs));
+
+	/* override the capability info */
+	for (i = 0; i < sizeof(ifmgd->s1g_capa.capab_info); i++) {
+		u8 mask = ifmgd->s1g_capa_mask.capab_info[i];
+
+		s1g_capab.capab_info[i] &= ~mask;
+		s1g_capab.capab_info[i] |= (ifmgd->s1g_capa.capab_info[i] &
+					    mask);
+	}
+
+	/* then MCS and NSS set */
+	for (i = 0; i < sizeof(ifmgd->s1g_capa.supp_mcs_nss); i++) {
+		u8 mask = ifmgd->s1g_capa_mask.supp_mcs_nss[i];
+
+		s1g_capab.supp_mcs_nss[i] &= ~mask;
+		s1g_capab.supp_mcs_nss[i] |= (ifmgd->s1g_capa.supp_mcs_nss[i] &
+					      mask);
+	}
+
+	*pos++ = WLAN_EID_S1G_CAPABILITIES;
+	*pos++ = sizeof(s1g_capab);
+
+	memcpy(pos, &s1g_capab, sizeof(s1g_capab));
+	pos += sizeof(s1g_capab);
+
+	return pos;
+}
+
 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
 {
 	*buf++ = WLAN_EID_VENDOR_SPECIFIC;
-- 
2.20.1