mac80211: pass P2P powersave parameters to driver

While connected to a GO, parse the P2P NoA attribute
and pass the CT Window and opportunistic powersave
parameters to the driver.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index dfa589b..23803ad 100644 (file)
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -208,6 +208,8 @@ struct ieee80211_chanctx_conf {
  * @BSS_CHANGED_AP_PROBE_RESP: Probe Response changed for this BSS (AP mode)
  * @BSS_CHANGED_PS: PS changed for this BSS (STA mode)
  * @BSS_CHANGED_TXPOWER: TX power setting changed for this interface
+ * @BSS_CHANGED_P2P_PS: P2P powersave settings (CTWindow, opportunistic PS)
+ *     changed (currently only in P2P client mode, GO mode will be later)
  */
 enum ieee80211_bss_change {
        BSS_CHANGED_ASSOC               = 1<<0,
@@ -229,6 +231,7 @@ enum ieee80211_bss_change {
        BSS_CHANGED_AP_PROBE_RESP       = 1<<16,
        BSS_CHANGED_PS                  = 1<<17,
        BSS_CHANGED_TXPOWER             = 1<<18,
+       BSS_CHANGED_P2P_PS              = 1<<19,
 
        /* when adding here, make sure to change ieee80211_reconfig */
 };
@@ -312,6 +315,8 @@ enum ieee80211_rssi_event {
  * @ssid_len: Length of SSID given in @ssid.
  * @hidden_ssid: The SSID of the current vif is hidden. Only valid in AP-mode.
  * @txpower: TX power in dBm
+ * @p2p_ctwindow: P2P CTWindow, only for P2P client interfaces
+ * @p2p_oppps: P2P opportunistic PS is enabled
  */
 struct ieee80211_bss_conf {
        const u8 *bssid;
@@ -345,6 +350,8 @@ struct ieee80211_bss_conf {
        size_t ssid_len;
        bool hidden_ssid;
        int txpower;
+       u8 p2p_ctwindow;
+       bool p2p_oppps;
 };
 
 /**

diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index d272e0c..e1fb97c 100644 (file)
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -473,6 +473,8 @@ struct ieee80211_if_managed {
 
        u8 use_4addr;
 
+       u8 p2p_noa_index;
+
        /* Signal strength from the last Beacon frame in the current BSS. */
        int last_beacon_signal;
 

diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 02ffe87..6161446 100644 (file)
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -1365,6 +1365,22 @@ static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
 
        sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
 
+       if (sdata->vif.p2p) {
+               u8 noa[2];
+               int ret;
+
+               ret = cfg80211_get_p2p_attr(cbss->information_elements,
+                                           cbss->len_information_elements,
+                                           IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
+                                           noa, sizeof(noa));
+               if (ret >= 2) {
+                       bss_conf->p2p_oppps = noa[1] & 0x80;
+                       bss_conf->p2p_ctwindow = noa[1] & 0x7f;
+                       bss_info_changed |= BSS_CHANGED_P2P_PS;
+                       sdata->u.mgd.p2p_noa_index = noa[0];
+               }
+       }
+
        /* just to be sure */
        ieee80211_stop_poll(sdata);
 
@@ -1487,6 +1503,9 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
        changed |= BSS_CHANGED_ASSOC;
        sdata->vif.bss_conf.assoc = false;
 
+       sdata->vif.bss_conf.p2p_ctwindow = 0;
+       sdata->vif.bss_conf.p2p_oppps = false;
+
        /* on the next assoc, re-program HT parameters */
        memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
        memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
@@ -2594,6 +2613,27 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
                }
        }
 
+       if (sdata->vif.p2p) {
+               u8 noa[2];
+               int ret;
+
+               ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
+                                           len - baselen,
+                                           IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
+                                           noa, sizeof(noa));
+               if (ret >= 2 && sdata->u.mgd.p2p_noa_index != noa[0]) {
+                       bss_conf->p2p_oppps = noa[1] & 0x80;
+                       bss_conf->p2p_ctwindow = noa[1] & 0x7f;
+                       changed |= BSS_CHANGED_P2P_PS;
+                       sdata->u.mgd.p2p_noa_index = noa[0];
+                       /*
+                        * make sure we update all information, the CRC
+                        * mechanism doesn't look at P2P attributes.
+                        */
+                       ifmgd->beacon_crc_valid = false;
+               }
+       }
+
        if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
                return;
        ifmgd->beacon_crc = ncrc;

diff --git a/net/mac80211/trace.h b/net/mac80211/trace.h
index eeebbd9..7794e53 100644 (file)
--- a/net/mac80211/trace.h
+++ b/net/mac80211/trace.h
@@ -343,6 +343,8 @@ TRACE_EVENT(drv_bss_info_changed,
                __dynamic_array(u8, ssid, info->ssid_len);
                __field(bool, hidden_ssid);
                __field(int, txpower)
+               __field(u8, p2p_ctwindow)
+               __field(bool, p2p_oppps)
        ),
 
        TP_fast_assign(
@@ -378,6 +380,8 @@ TRACE_EVENT(drv_bss_info_changed,
                memcpy(__get_dynamic_array(ssid), info->ssid, info->ssid_len);
                __entry->hidden_ssid = info->hidden_ssid;
                __entry->txpower = info->txpower;
+               __entry->p2p_ctwindow = info->p2p_ctwindow;
+               __entry->p2p_oppps = info->p2p_oppps;
        ),
 
        TP_printk(