iwlwifi: mvm: use firmware station PM notification for AP_LINK_PS

When using RSS on 9000 series devices, we can't rely on processing the
received frames for station powersave handling, since they could be
processed on different CPUs and out of order.

In order to still manage the powersave of stations, the firmware sends
a notification on sleep->wake, wake->sleep and - for U-APSD - frames
received with PM while already sleeping (with the TID.)

With this, the driver can set AP_LINK_PS, which is required for real
parallel RX. In addition, this requires checking for PS-Poll frames
and calling ieee80211_sta_pspoll() appropriately.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

1 files changed, 26 insertions, 0 deletions

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/fw-api-rx.h b/drivers/net/wireless/intel/iwlwifi/mvm/fw-api-rx.h
index acc5cd53e4ba..b530fa47d68a 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/fw-api-rx.h
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/fw-api-rx.h
@@ -474,4 +474,30 @@ struct iwl_mvm_internal_rxq_notif {
 	u8 data[];
 } __packed;
 
+/**
+ * enum iwl_mvm_pm_event - type of station PM event
+ * @IWL_MVM_PM_EVENT_AWAKE: station woke up
+ * @IWL_MVM_PM_EVENT_ASLEEP: station went to sleep
+ * @IWL_MVM_PM_EVENT_UAPSD: station sent uAPSD trigger
+ * @IWL_MVM_PM_EVENT_PS_POLL: station sent PS-Poll
+ */
+enum iwl_mvm_pm_event {
+	IWL_MVM_PM_EVENT_AWAKE,
+	IWL_MVM_PM_EVENT_ASLEEP,
+	IWL_MVM_PM_EVENT_UAPSD,
+	IWL_MVM_PM_EVENT_PS_POLL,
+}; /* PEER_PM_NTFY_API_E_VER_1 */
+
+/**
+ * struct iwl_mvm_pm_state_notification - station PM state notification
+ * @sta_id: station ID of the station changing state
+ * @type: the new powersave state, see IWL_MVM_PM_EVENT_ above
+ */
+struct iwl_mvm_pm_state_notification {
+	u8 sta_id;
+	u8 type;
+	/* private: */
+	u16 reserved;
+} __packed; /* PEER_PM_NTFY_API_S_VER_1 */
+
 #endif /* __fw_api_rx_h__ */