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, 3 insertions, 0 deletions

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
index 05fe6dd1a2c8..e86986f5c40d 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
@@ -306,6 +306,8 @@ static const struct iwl_rx_handlers iwl_mvm_rx_handlers[] = {
                        iwl_mvm_rx_stored_beacon_notif, RX_HANDLER_SYNC),
         RX_HANDLER_GRP(DATA_PATH_GROUP, MU_GROUP_MGMT_NOTIF,
                        iwl_mvm_mu_mimo_grp_notif, RX_HANDLER_SYNC),
+        RX_HANDLER_GRP(DATA_PATH_GROUP, STA_PM_NOTIF,
+                       iwl_mvm_sta_pm_notif, RX_HANDLER_SYNC),
 };
 #undef RX_HANDLER
 #undef RX_HANDLER_GRP
@@ -452,6 +454,7 @@ static const struct iwl_hcmd_names iwl_mvm_phy_names[] = {
 static const struct iwl_hcmd_names iwl_mvm_data_path_names[] = {
         HCMD_NAME(UPDATE_MU_GROUPS_CMD),
         HCMD_NAME(TRIGGER_RX_QUEUES_NOTIF_CMD),
+        HCMD_NAME(STA_PM_NOTIF),
         HCMD_NAME(MU_GROUP_MGMT_NOTIF),
         HCMD_NAME(RX_QUEUES_NOTIFICATION),
 };