mac80211: enable spatial multiplexing powersave
Enable spatial multiplexing in mac80211 by telling the
driver what to do and, where necessary, sending action
frames to the AP to update the requested SMPS mode.
Also includes a trivial implementation for hwsim that
just logs the requested mode.
For now, the userspace interface is in debugfs only,
and let you toggle the requested mode at any time.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index cd5dcc3..0a762a9 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -398,6 +398,8 @@
__le16 tmp;
u32 flags = local->hw.conf.channel->flags;
+ /* determine capability flags */
+
switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
@@ -413,17 +415,64 @@
break;
}
- tmp = cpu_to_le16(cap);
- pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
+ /* set SM PS mode properly */
+ cap &= ~IEEE80211_HT_CAP_SM_PS;
+ /* new association always uses requested smps mode */
+ if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
+ if (ifmgd->powersave)
+ ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
+ else
+ ifmgd->ap_smps = IEEE80211_SMPS_OFF;
+ } else
+ ifmgd->ap_smps = ifmgd->req_smps;
+
+ switch (ifmgd->ap_smps) {
+ case IEEE80211_SMPS_AUTOMATIC:
+ case IEEE80211_SMPS_NUM_MODES:
+ WARN_ON(1);
+ case IEEE80211_SMPS_OFF:
+ cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
+ IEEE80211_HT_CAP_SM_PS_SHIFT;
+ break;
+ case IEEE80211_SMPS_STATIC:
+ cap |= WLAN_HT_CAP_SM_PS_STATIC <<
+ IEEE80211_HT_CAP_SM_PS_SHIFT;
+ break;
+ case IEEE80211_SMPS_DYNAMIC:
+ cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
+ IEEE80211_HT_CAP_SM_PS_SHIFT;
+ break;
+ }
+
+ /* reserve and fill IE */
+
+ pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
*pos++ = WLAN_EID_HT_CAPABILITY;
*pos++ = sizeof(struct ieee80211_ht_cap);
memset(pos, 0, sizeof(struct ieee80211_ht_cap));
+
+ /* capability flags */
+ tmp = cpu_to_le16(cap);
memcpy(pos, &tmp, sizeof(u16));
pos += sizeof(u16);
- /* TODO: needs a define here for << 2 */
+
+ /* AMPDU parameters */
*pos++ = sband->ht_cap.ampdu_factor |
- (sband->ht_cap.ampdu_density << 2);
+ (sband->ht_cap.ampdu_density <<
+ IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
+
+ /* MCS set */
memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
+ pos += sizeof(sband->ht_cap.mcs);
+
+ /* extended capabilities */
+ pos += sizeof(__le16);
+
+ /* BF capabilities */
+ pos += sizeof(__le32);
+
+ /* antenna selection */
+ pos += sizeof(u8);
}
IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
@@ -932,6 +981,7 @@
mutex_lock(&local->iflist_mtx);
ieee80211_recalc_ps(local, -1);
+ ieee80211_recalc_smps(local, sdata);
mutex_unlock(&local->iflist_mtx);
netif_start_queue(sdata->dev);
@@ -2327,6 +2377,11 @@
ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
mutex_init(&ifmgd->mtx);
+
+ if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
+ ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
+ else
+ ifmgd->req_smps = IEEE80211_SMPS_OFF;
}
/* scan finished notification */