From: Sara Sharon <sara.sha...@intel.com>
The Group ID Management frame is an Action frame of
category VHT. It is transmitted by the AP to assign
or change the user position of a STA for one or more
group IDs.
Process and save the group membership data. Notify
underlying driver of changes.
Signed-off-by: Sara Sharon <sara.sha...@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumb...@intel.com>
---
include/linux/ieee80211.h | 7 +++++++
include/net/mac80211.h | 17 +++++++++++++++++
net/mac80211/ieee80211_i.h | 2 ++
net/mac80211/iface.c | 10 ++++++++++
net/mac80211/mlme.c | 7 +++++++
net/mac80211/rx.c | 5 +++++
net/mac80211/util.c | 3 +++
net/mac80211/vht.c | 25 +++++++++++++++++++++++++
8 files changed, 76 insertions(+)
diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h
index 452c0b0..d9ddb89 100644
--- a/include/linux/ieee80211.h
+++ b/include/linux/ieee80211.h
@@ -843,6 +843,8 @@ enum ieee80211_vht_opmode_bits {
};
#define WLAN_SA_QUERY_TR_ID_LEN 2
+#define WLAN_MEMBERSHIP_LEN 8
+#define WLAN_USER_POSITION_LEN 16
/**
* struct ieee80211_tpc_report_ie
@@ -991,6 +993,11 @@ struct ieee80211_mgmt {
} __packed vht_opmode_notif;
struct {
u8 action_code;
+ u8 membership[WLAN_MEMBERSHIP_LEN];
+ u8 position[WLAN_USER_POSITION_LEN];
+ } __packed vht_group_notif;
+ struct {
+ u8 action_code;
u8 dialog_token;
u8 tpc_elem_id;
u8 tpc_elem_length;
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 7c30faf..8da483b 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -298,6 +298,7 @@ struct ieee80211_vif_chanctx_switch {
* note that this is only called when it changes after the channel
* context had been assigned.
* @BSS_CHANGED_OCB: OCB join status changed
+ * @BSS_CHANGED_MU_GROUPS: VHT MU-MIMO group id or user position changed
*/
enum ieee80211_bss_change {
BSS_CHANGED_ASSOC = 1<<0,
@@ -323,6 +324,7 @@ enum ieee80211_bss_change {
BSS_CHANGED_BEACON_INFO = 1<<20,
BSS_CHANGED_BANDWIDTH = 1<<21,
BSS_CHANGED_OCB = 1<<22,
+ BSS_CHANGED_MU_GROUPS = 1<<23,
/* when adding here, make sure to change ieee80211_reconfig */
};
@@ -436,6 +438,19 @@ struct ieee80211_event {
};
/**
+ * struct ieee80211_mu_group_data - STA's VHT MU-MIMO group data
+ *
+ * This structure describes the group id data of VHT MU-MIMO
+ *
+ * @membership: 64 bits array - a bit is set if station is member of the group
+ * @position: 2 bits per group id indicating the position in the group
+ */
+struct ieee80211_mu_group_data {
+ u8 membership[WLAN_MEMBERSHIP_LEN];
+ u8 position[WLAN_USER_POSITION_LEN];
+};
+
+/**
* struct ieee80211_bss_conf - holds the BSS's changing parameters
*
* This structure keeps information about a BSS (and an association
@@ -477,6 +492,7 @@ struct ieee80211_event {
* @enable_beacon: whether beaconing should be enabled or not
* @chandef: Channel definition for this BSS -- the hardware might be
* configured a higher bandwidth than this BSS uses, for example.
+ * @mu_group: VHT MU-MIMO group membership data
* @ht_operation_mode: HT operation mode like in &struct
ieee80211_ht_operation.
* This field is only valid when the channel is a wide HT/VHT channel.
* Note that with TDLS this can be the case (channel is HT, protection must
@@ -535,6 +551,7 @@ struct ieee80211_bss_conf {
s32 cqm_rssi_thold;
u32 cqm_rssi_hyst;
struct cfg80211_chan_def chandef;
+ struct ieee80211_mu_group_data mu_group;
__be32 arp_addr_list[IEEE80211_BSS_ARP_ADDR_LIST_LEN];
int arp_addr_cnt;
bool qos;
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index c30b684..582ea86 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -1714,6 +1714,8 @@ ieee80211_vht_cap_ie_to_sta_vht_cap(struct
ieee80211_sub_if_data *sdata,
enum ieee80211_sta_rx_bandwidth ieee80211_sta_cap_rx_bw(struct sta_info *sta);
enum ieee80211_sta_rx_bandwidth ieee80211_sta_cur_vht_bw(struct sta_info *sta);
void ieee80211_sta_set_rx_nss(struct sta_info *sta);
+void ieee80211_process_mu_groups(struct ieee80211_sub_if_data *sdata,
+ struct ieee80211_mgmt *mgmt);
u32 __ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
struct sta_info *sta, u8 opmode,
enum ieee80211_band band, bool nss_only);
diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index c9e325d..33ae3c8 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -1271,6 +1271,16 @@ static void ieee80211_iface_work(struct work_struct
*work)
}
}
mutex_unlock(&local->sta_mtx);
+ } else if (ieee80211_is_action(mgmt->frame_control) &&
+ mgmt->u.action.category == WLAN_CATEGORY_VHT) {
+ switch (mgmt->u.action.u.vht_group_notif.action_code) {
+ case WLAN_VHT_ACTION_GROUPID_MGMT:
+ ieee80211_process_mu_groups(sdata, mgmt);
+ break;
+ default:
+ WARN_ON(1);
+ break;
+ }
} else if (ieee80211_is_data_qos(mgmt->frame_control)) {
struct ieee80211_hdr *hdr = (void *)mgmt;
/*
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 123b26d..1e6b337 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -2074,6 +2074,13 @@ static void ieee80211_set_disassoc(struct
ieee80211_sub_if_data *sdata,
memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
+
+ /* reset MU-MIMO ownership and group data */
+ memset(sdata->vif.bss_conf.mu_group.membership, 0,
+ sizeof(sdata->vif.bss_conf.mu_group.membership));
+ memset(sdata->vif.bss_conf.mu_group.position, 0,
+ sizeof(sdata->vif.bss_conf.mu_group.position));
+ changed |= BSS_CHANGED_MU_GROUPS;
sdata->flags &= ~IEEE80211_SDATA_MU_MIMO_OWNER;
sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 1f82753..c4198d48 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -2739,6 +2739,11 @@ ieee80211_rx_h_action(struct ieee80211_rx_data *rx)
false);
goto handled;
}
+ case WLAN_VHT_ACTION_GROUPID_MGMT: {
+ if (len < IEEE80211_MIN_ACTION_SIZE + 25)
+ goto invalid;
+ goto queue;
+ }
default:
break;
}
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 08af2b3..4d6130b 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -1905,6 +1905,9 @@ int ieee80211_reconfig(struct ieee80211_local *local)
BSS_CHANGED_IDLE |
BSS_CHANGED_TXPOWER;
+ if (sdata->flags & IEEE80211_SDATA_MU_MIMO_OWNER)
+ changed |= BSS_CHANGED_MU_GROUPS;
+
switch (sdata->vif.type) {
case NL80211_IFTYPE_STATION:
changed |= BSS_CHANGED_ASSOC |
diff --git a/net/mac80211/vht.c b/net/mac80211/vht.c
index ff1c798..92c9843 100644
--- a/net/mac80211/vht.c
+++ b/net/mac80211/vht.c
@@ -1,6 +1,9 @@
/*
* VHT handling
*
+ * Portions of this file
+ * Copyright(c) 2015 Intel Deutschland GmbH
+ *
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
@@ -428,6 +431,28 @@ u32 __ieee80211_vht_handle_opmode(struct
ieee80211_sub_if_data *sdata,
return changed;
}
+void ieee80211_process_mu_groups(struct ieee80211_sub_if_data *sdata,
+ struct ieee80211_mgmt *mgmt)
+{
+ struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
+
+ if (!(sdata->flags & IEEE80211_SDATA_MU_MIMO_OWNER))
+ return;
+
+ if (!memcmp(mgmt->u.action.u.vht_group_notif.position,
+ bss_conf->mu_group.position, WLAN_USER_POSITION_LEN) &&
+ !memcmp(mgmt->u.action.u.vht_group_notif.membership,
+ bss_conf->mu_group.membership, WLAN_MEMBERSHIP_LEN))
+ return;
+
+ memcpy(mgmt->u.action.u.vht_group_notif.membership,
+ bss_conf->mu_group.membership, WLAN_MEMBERSHIP_LEN);
+ memcpy(mgmt->u.action.u.vht_group_notif.position,
+ bss_conf->mu_group.position, WLAN_USER_POSITION_LEN);
+
+ ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_MU_GROUPS);
+}
+
void ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
struct sta_info *sta, u8 opmode,
enum ieee80211_band band, bool nss_only)
--
2.5.0
--
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