iwlwifi: Recover TX flow stall due to stuck queue

Monitors the internal TX queues periodically.  When a queue is stuck
for some unknown conditions causing the throughput to drop and the
transfer is stop, the driver will force firmware reload and bring the
system back to normal operational state.

The iwlwifi devices behave differently in this regard so this feature is
made part of the ops infrastructure so we can have more control on how to
monitor and recover from tx queue stall case per device.

Signed-off-by: Trieu 'Andrew' Nguyen <trieux.t.nguyen@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-5000.c b/drivers/net/wireless/iwlwifi/iwl-5000.c
index 8ab28a760157..a01b3c59a5a7 100644
--- a/drivers/net/wireless/iwlwifi/iwl-5000.c
+++ b/drivers/net/wireless/iwlwifi/iwl-5000.c
@@ -1499,6 +1499,7 @@ struct iwl_lib_ops iwl5000_lib = {
                 .set_ct_kill = iwl5000_set_ct_threshold,
          },
         .add_bcast_station = iwl_add_bcast_station,
+        .recover_from_tx_stall = iwl_bg_monitor_recover,
 };
 
 static struct iwl_lib_ops iwl5150_lib = {
@@ -1553,6 +1554,7 @@ static struct iwl_lib_ops iwl5150_lib = {
                 .set_ct_kill = iwl5150_set_ct_threshold,
          },
         .add_bcast_station = iwl_add_bcast_station,
+        .recover_from_tx_stall = iwl_bg_monitor_recover,
 };
 
 static const struct iwl_ops iwl5000_ops = {
@@ -1602,6 +1604,7 @@ struct iwl_cfg iwl5300_agn_cfg = {
         .chain_noise_num_beacons = IWL_CAL_NUM_BEACONS,
         .plcp_delta_threshold = IWL_MAX_PLCP_ERR_LONG_THRESHOLD_DEF,
         .chain_noise_scale = 1000,
+        .monitor_recover_period = IWL_MONITORING_PERIOD,
 };
 
 struct iwl_cfg iwl5100_bgn_cfg = {
@@ -1628,6 +1631,7 @@ struct iwl_cfg iwl5100_bgn_cfg = {
         .chain_noise_num_beacons = IWL_CAL_NUM_BEACONS,
         .plcp_delta_threshold = IWL_MAX_PLCP_ERR_LONG_THRESHOLD_DEF,
         .chain_noise_scale = 1000,
+        .monitor_recover_period = IWL_MONITORING_PERIOD,
 };
 
 struct iwl_cfg iwl5100_abg_cfg = {
@@ -1652,6 +1656,7 @@ struct iwl_cfg iwl5100_abg_cfg = {
         .chain_noise_num_beacons = IWL_CAL_NUM_BEACONS,
         .plcp_delta_threshold = IWL_MAX_PLCP_ERR_LONG_THRESHOLD_DEF,
         .chain_noise_scale = 1000,
+        .monitor_recover_period = IWL_MONITORING_PERIOD,
 };
 
 struct iwl_cfg iwl5100_agn_cfg = {
@@ -1678,6 +1683,7 @@ struct iwl_cfg iwl5100_agn_cfg = {
         .chain_noise_num_beacons = IWL_CAL_NUM_BEACONS,
         .plcp_delta_threshold = IWL_MAX_PLCP_ERR_LONG_THRESHOLD_DEF,
         .chain_noise_scale = 1000,
+        .monitor_recover_period = IWL_MONITORING_PERIOD,
 };
 
 struct iwl_cfg iwl5350_agn_cfg = {
@@ -1704,6 +1710,7 @@ struct iwl_cfg iwl5350_agn_cfg = {
         .chain_noise_num_beacons = IWL_CAL_NUM_BEACONS,
         .plcp_delta_threshold = IWL_MAX_PLCP_ERR_LONG_THRESHOLD_DEF,
         .chain_noise_scale = 1000,
+        .monitor_recover_period = IWL_MONITORING_PERIOD,
 };
 
 struct iwl_cfg iwl5150_agn_cfg = {
@@ -1730,6 +1737,7 @@ struct iwl_cfg iwl5150_agn_cfg = {
         .chain_noise_num_beacons = IWL_CAL_NUM_BEACONS,
         .plcp_delta_threshold = IWL_MAX_PLCP_ERR_LONG_THRESHOLD_DEF,
         .chain_noise_scale = 1000,
+        .monitor_recover_period = IWL_MONITORING_PERIOD,
 };
 
 struct iwl_cfg iwl5150_abg_cfg = {
@@ -1754,6 +1762,7 @@ struct iwl_cfg iwl5150_abg_cfg = {
         .chain_noise_num_beacons = IWL_CAL_NUM_BEACONS,
         .plcp_delta_threshold = IWL_MAX_PLCP_ERR_LONG_THRESHOLD_DEF,
         .chain_noise_scale = 1000,
+        .monitor_recover_period = IWL_MONITORING_PERIOD,
 };
 
 MODULE_FIRMWARE(IWL5000_MODULE_FIRMWARE(IWL5000_UCODE_API_MAX));