Commit 60ad72da authored by Sven Eckelmann's avatar Sven Eckelmann Committed by Johannes Berg
Browse files

mac80211: implement HE support for mesh 



Implement the basics required for supporting high efficiency with mesh:
include HE information elements in beacons, probe responses, and peering
action frames, and check for compatible HE configurations when peering.

Signed-off-by: default avatarSven Eckelmann <seckelmann@datto.com>

Forwarded: https://patchwork.kernel.org/patch/11029299/
Link: https://lore.kernel.org/r/20190724163359.3507-2-sven@narfation.org


Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent a0b4496a

net/mac80211/ieee80211_i.h

+2 −0
Original line number Diff line number Diff line
@@ -2136,9 +2136,11 @@ u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, 
			       u32 cap);

u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,

				const struct cfg80211_chan_def *chandef);

u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype);

u8 *ieee80211_ie_build_he_cap(u8 *pos,

			      const struct ieee80211_sta_he_cap *he_cap,

			      u8 *end);

u8 *ieee80211_ie_build_he_oper(u8 *pos);

int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,

			     const struct ieee80211_supported_band *sband,

			     const u8 *srates, int srates_len, u32 *rates);

net/mac80211/mesh.c

+62 −0
Original line number Diff line number Diff line
@@ -532,6 +532,61 @@ int mesh_add_vht_oper_ie(struct ieee80211_sub_if_data *sdata, 
	return 0;

}



int mesh_add_he_cap_ie(struct ieee80211_sub_if_data *sdata,

		       struct sk_buff *skb, u8 ie_len)

{

	const struct ieee80211_sta_he_cap *he_cap;

	struct ieee80211_supported_band *sband;

	u8 *pos;



	sband = ieee80211_get_sband(sdata);

	if (!sband)

		return -EINVAL;



	he_cap = ieee80211_get_he_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT);



	if (!he_cap ||

	    sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||

	    sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||

	    sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)

		return 0;



	if (skb_tailroom(skb) < ie_len)

		return -ENOMEM;



	pos = skb_put(skb, ie_len);

	ieee80211_ie_build_he_cap(pos, he_cap, pos + ie_len);



	return 0;

}



int mesh_add_he_oper_ie(struct ieee80211_sub_if_data *sdata,

			struct sk_buff *skb)

{

	const struct ieee80211_sta_he_cap *he_cap;

	struct ieee80211_supported_band *sband;

	u8 *pos;



	sband = ieee80211_get_sband(sdata);

	if (!sband)

		return -EINVAL;



	he_cap = ieee80211_get_he_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT);

	if (!he_cap ||

	    sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||

	    sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||

	    sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)

		return 0;



	if (skb_tailroom(skb) < 2 + 1 + sizeof(struct ieee80211_he_operation))

		return -ENOMEM;



	pos = skb_put(skb, 2 + 1 + sizeof(struct ieee80211_he_operation));

	ieee80211_ie_build_he_oper(pos);



	return 0;

}



static void ieee80211_mesh_path_timer(struct timer_list *t)

{

	struct ieee80211_sub_if_data *sdata =
@@ -677,6 +732,7 @@ ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh) 
	struct ieee80211_chanctx_conf *chanctx_conf;

	struct mesh_csa_settings *csa;

	enum nl80211_band band;

	u8 ie_len_he_cap;

	u8 *pos;

	struct ieee80211_sub_if_data *sdata;

	int hdr_len = offsetofend(struct ieee80211_mgmt, u.beacon);
@@ -687,6 +743,8 @@ ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh) 
	band = chanctx_conf->def.chan->band;

	rcu_read_unlock();



	ie_len_he_cap = ieee80211_ie_len_he_cap(sdata,

						NL80211_IFTYPE_MESH_POINT);

	head_len = hdr_len +

		   2 + /* NULL SSID */

		   /* Channel Switch Announcement */
@@ -706,6 +764,8 @@ ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh) 
		   2 + sizeof(__le16) + /* awake window */

		   2 + sizeof(struct ieee80211_vht_cap) +

		   2 + sizeof(struct ieee80211_vht_operation) +

		   ie_len_he_cap +

		   2 + 1 + sizeof(struct ieee80211_he_operation) +

		   ifmsh->ie_len;



	bcn = kzalloc(sizeof(*bcn) + head_len + tail_len, GFP_KERNEL);
@@ -823,6 +883,8 @@ ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh) 
	    mesh_add_awake_window_ie(sdata, skb) ||

	    mesh_add_vht_cap_ie(sdata, skb) ||

	    mesh_add_vht_oper_ie(sdata, skb) ||

	    mesh_add_he_cap_ie(sdata, skb, ie_len_he_cap) ||

	    mesh_add_he_oper_ie(sdata, skb) ||

	    mesh_add_vendor_ies(sdata, skb))

		goto out_free;

net/mac80211/mesh.h

+4 −0
Original line number Diff line number Diff line
@@ -218,6 +218,10 @@ int mesh_add_vht_cap_ie(struct ieee80211_sub_if_data *sdata, 
			struct sk_buff *skb);

int mesh_add_vht_oper_ie(struct ieee80211_sub_if_data *sdata,

			 struct sk_buff *skb);

int mesh_add_he_cap_ie(struct ieee80211_sub_if_data *sdata,

		       struct sk_buff *skb, u8 ie_len);

int mesh_add_he_oper_ie(struct ieee80211_sub_if_data *sdata,

			struct sk_buff *skb);

void mesh_rmc_free(struct ieee80211_sub_if_data *sdata);

int mesh_rmc_init(struct ieee80211_sub_if_data *sdata);

void ieee80211s_init(void);

net/mac80211/mesh_plink.c

+11 −1
Original line number Diff line number Diff line
@@ -218,9 +218,12 @@ static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata, 
	bool include_plid = false;

	u16 peering_proto = 0;

	u8 *pos, ie_len = 4;

	u8 ie_len_he_cap;

	int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.self_prot);

	int err = -ENOMEM;



	ie_len_he_cap = ieee80211_ie_len_he_cap(sdata,

						NL80211_IFTYPE_MESH_POINT);

	skb = dev_alloc_skb(local->tx_headroom +

			    hdr_len +

			    2 + /* capability info */
@@ -233,6 +236,8 @@ static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata, 
			    2 + sizeof(struct ieee80211_ht_operation) +

			    2 + sizeof(struct ieee80211_vht_cap) +

			    2 + sizeof(struct ieee80211_vht_operation) +

			    ie_len_he_cap +

			    2 + 1 + sizeof(struct ieee80211_he_operation) +

			    2 + 8 + /* peering IE */

			    sdata->u.mesh.ie_len);

	if (!skb)
@@ -321,7 +326,9 @@ static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata, 
		if (mesh_add_ht_cap_ie(sdata, skb) ||

		    mesh_add_ht_oper_ie(sdata, skb) ||

		    mesh_add_vht_cap_ie(sdata, skb) ||

		    mesh_add_vht_oper_ie(sdata, skb))

		    mesh_add_vht_oper_ie(sdata, skb) ||

		    mesh_add_he_cap_ie(sdata, skb, ie_len_he_cap) ||

		    mesh_add_he_oper_ie(sdata, skb))

			goto free;

	}
@@ -433,6 +440,9 @@ static void mesh_sta_info_init(struct ieee80211_sub_if_data *sdata, 
	ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,

					    elems->vht_cap_elem, sta);



	ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, elems->he_cap,

					  elems->he_cap_len, sta);



	if (bw != sta->sta.bandwidth)

		changed |= IEEE80211_RC_BW_CHANGED;

net/mac80211/util.c

+49 −0
Original line number Diff line number Diff line
@@ -2713,6 +2713,27 @@ u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, 
	return pos;

}



u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)

{

	const struct ieee80211_sta_he_cap *he_cap;

	struct ieee80211_supported_band *sband;

	u8 n;



	sband = ieee80211_get_sband(sdata);

	if (!sband)

		return 0;



	he_cap = ieee80211_get_he_iftype_cap(sband, iftype);

	if (!he_cap)

		return 0;



	n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);

	return 2 + 1 +

	       sizeof(he_cap->he_cap_elem) + n +

	       ieee80211_he_ppe_size(he_cap->ppe_thres[0],

				     he_cap->he_cap_elem.phy_cap_info);

}



u8 *ieee80211_ie_build_he_cap(u8 *pos,

			      const struct ieee80211_sta_he_cap *he_cap,

			      u8 *end)
@@ -2902,6 +2923,34 @@ u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, 
	return pos + sizeof(struct ieee80211_vht_operation);

}



u8 *ieee80211_ie_build_he_oper(u8 *pos)

{

	struct ieee80211_he_operation *he_oper;

	u32 he_oper_params;



	*pos++ = WLAN_EID_EXTENSION;

	*pos++ = 1 + sizeof(struct ieee80211_he_operation);

	*pos++ = WLAN_EID_EXT_HE_OPERATION;



	he_oper_params = 0;

	he_oper_params |= u32_encode_bits(1023, /* disabled */

				IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);

	he_oper_params |= u32_encode_bits(1,

				IEEE80211_HE_OPERATION_ER_SU_DISABLE);

	he_oper_params |= u32_encode_bits(1,

				IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);



	he_oper = (struct ieee80211_he_operation *)pos;

	he_oper->he_oper_params = cpu_to_le32(he_oper_params);



	/* don't require special HE peer rates */

	he_oper->he_mcs_nss_set = cpu_to_le16(0xffff);



	/* TODO add VHT operational and 6GHz operational subelement? */



	return pos + sizeof(struct ieee80211_vht_operation);

}



bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,

			       struct cfg80211_chan_def *chandef)

{

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