Techwizz/kernel-fxtec-pro1x
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

iwl3945: add plcp error checking

Browse source 
Add plcp error checking for 3945. After threshold of plcp
is reached , it resets the radio

Signed-off-by: Abhijeet Kolekar <abhijeet.kolekar@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
This commit is contained in:
Abhijeet Kolekar 2010-04-28 15:47:04 -07:00 committed by Reinette Chatre
parent dd7a2509b3
commit a29576a784
3 changed files with 69 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

67
drivers/net/wireless/iwlwifi/iwl-3945.c
View file

@ -390,6 +390,67 @@ static void iwl3945_accumulative_statistics(struct iwl_priv *priv,
}
#endif
/**
* iwl3945_good_plcp_health - checks for plcp error.
*
* When the plcp error is exceeding the thresholds, reset the radio
* to improve the throughput.
*/
static bool iwl3945_good_plcp_health(struct iwl_priv *priv,
struct iwl_rx_packet *pkt)
{
bool rc = true;
struct iwl3945_notif_statistics current_stat;
int combined_plcp_delta;
unsigned int plcp_msec;
unsigned long plcp_received_jiffies;
memcpy(&current_stat, pkt->u.raw, sizeof(struct
iwl3945_notif_statistics));
/*
* check for plcp_err and trigger radio reset if it exceeds
* the plcp error threshold plcp_delta.
*/
plcp_received_jiffies = jiffies;
plcp_msec = jiffies_to_msecs((long) plcp_received_jiffies -
(long) priv->plcp_jiffies);
priv->plcp_jiffies = plcp_received_jiffies;
/*
* check to make sure plcp_msec is not 0 to prevent division
* by zero.
*/
if (plcp_msec) {
combined_plcp_delta =
(le32_to_cpu(current_stat.rx.ofdm.plcp_err) -
le32_to_cpu(priv->_3945.statistics.rx.ofdm.plcp_err));
if ((combined_plcp_delta > 0) &&
((combined_plcp_delta * 100) / plcp_msec) >
priv->cfg->plcp_delta_threshold) {
/*
* if plcp_err exceed the threshold, the following
* data is printed in csv format:
* Text: plcp_err exceeded %d,
* Received ofdm.plcp_err,
* Current ofdm.plcp_err,
* combined_plcp_delta,
* plcp_msec
*/
IWL_DEBUG_RADIO(priv, "plcp_err exceeded %u, "
"%u, %d, %u mSecs\n",
priv->cfg->plcp_delta_threshold,
le32_to_cpu(current_stat.rx.ofdm.plcp_err),
combined_plcp_delta, plcp_msec);
/*
* Reset the RF radio due to the high plcp
* error rate
*/
rc = false;
}
}
return rc;
}
void iwl3945_hw_rx_statistics(struct iwl_priv *priv,
struct iwl_rx_mem_buffer *rxb)
{
@ -401,6 +462,7 @@ void iwl3945_hw_rx_statistics(struct iwl_priv *priv,
#ifdef CONFIG_IWLWIFI_DEBUG
iwl3945_accumulative_statistics(priv, (__le32 *)&pkt->u.raw);
#endif
iwl_recover_from_statistics(priv, pkt);
memcpy(&priv->_3945.statistics, pkt->u.raw, sizeof(priv->_3945.statistics));
}
@ -2792,6 +2854,7 @@ static struct iwl_lib_ops iwl3945_lib = {
.config_ap = iwl3945_config_ap,
.manage_ibss_station = iwl3945_manage_ibss_station,
.add_bcast_station = iwl3945_add_bcast_station,
.check_plcp_health = iwl3945_good_plcp_health,
.debugfs_ops = {
.rx_stats_read = iwl3945_ucode_rx_stats_read,
@ -2832,7 +2895,7 @@ static struct iwl_cfg iwl3945_bg_cfg = {
.ht_greenfield_support = false,
.led_compensation = 64,
.broken_powersave = true,
.plcp_delta_threshold = IWL_MAX_PLCP_ERR_THRESHOLD_DEF,
.plcp_delta_threshold = IWL_MAX_PLCP_ERR_LONG_THRESHOLD_DEF,
.monitor_recover_period = IWL_MONITORING_PERIOD,
.max_event_log_size = 512,
.tx_power_by_driver = true,
@ -2853,7 +2916,7 @@ static struct iwl_cfg iwl3945_abg_cfg = {
.ht_greenfield_support = false,
.led_compensation = 64,
.broken_powersave = true,
.plcp_delta_threshold = IWL_MAX_PLCP_ERR_THRESHOLD_DEF,
.plcp_delta_threshold = IWL_MAX_PLCP_ERR_LONG_THRESHOLD_DEF,
.monitor_recover_period = IWL_MONITORING_PERIOD,
.max_event_log_size = 512,
.tx_power_by_driver = true,

2
drivers/net/wireless/iwlwifi/iwl-core.h
View file

@ -441,6 +441,8 @@ bool iwl_good_plcp_health(struct iwl_priv *priv,
struct iwl_rx_packet *pkt);
bool iwl_good_ack_health(struct iwl_priv *priv,
struct iwl_rx_packet *pkt);
void iwl_recover_from_statistics(struct iwl_priv *priv,
struct iwl_rx_packet *pkt);
void iwl_rx_statistics(struct iwl_priv *priv,
struct iwl_rx_mem_buffer *rxb);
void iwl_reply_statistics(struct iwl_priv *priv,

3
drivers/net/wireless/iwlwifi/iwl-rx.c
View file

@ -397,7 +397,7 @@ bool iwl_good_plcp_health(struct iwl_priv *priv,
}
EXPORT_SYMBOL(iwl_good_plcp_health);
static void iwl_recover_from_statistics(struct iwl_priv *priv,
void iwl_recover_from_statistics(struct iwl_priv *priv,
struct iwl_rx_packet *pkt)
{
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
@ -428,6 +428,7 @@ static void iwl_recover_from_statistics(struct iwl_priv *priv,
}
}
}
EXPORT_SYMBOL(iwl_recover_from_statistics);
void iwl_rx_statistics(struct iwl_priv *priv,
struct iwl_rx_mem_buffer *rxb)