diff options
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-rx.c')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-rx.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-rx.c b/drivers/net/wireless/iwlwifi/iwl-rx.c index dc06c7bb0f5c..ea309f42a78a 100644 --- a/drivers/net/wireless/iwlwifi/iwl-rx.c +++ b/drivers/net/wireless/iwlwifi/iwl-rx.c @@ -602,11 +602,15 @@ static void iwl_accumulative_statistics(struct iwl_priv *priv, #define REG_RECALIB_PERIOD (60) +#define PLCP_MSG "plcp_err exceeded %u, %u, %u, %u, %u, %d, %u mSecs\n" void iwl_rx_statistics(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { int change; struct iwl_rx_packet *pkt = rxb_addr(rxb); + int combined_plcp_delta; + unsigned int plcp_msec; + unsigned long plcp_received_jiffies; IWL_DEBUG_RX(priv, "Statistics notification received (%d vs %d).\n", (int)sizeof(priv->statistics), @@ -621,6 +625,56 @@ void iwl_rx_statistics(struct iwl_priv *priv, #ifdef CONFIG_IWLWIFI_DEBUG iwl_accumulative_statistics(priv, (__le32 *)&pkt->u.stats); #endif + /* + * 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(pkt->u.stats.rx.ofdm.plcp_err) - + le32_to_cpu(priv->statistics.rx.ofdm.plcp_err)) + + (le32_to_cpu(pkt->u.stats.rx.ofdm_ht.plcp_err) - + le32_to_cpu(priv->statistics.rx.ofdm_ht.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, + * Received ofdm_ht.plcp_err, + * Current ofdm_ht.plcp_err, + * combined_plcp_delta, + * plcp_msec + */ + IWL_DEBUG_RADIO(priv, PLCP_MSG, + priv->cfg->plcp_delta_threshold, + le32_to_cpu(pkt->u.stats.rx.ofdm.plcp_err), + le32_to_cpu(priv->statistics.rx.ofdm.plcp_err), + le32_to_cpu(pkt->u.stats.rx.ofdm_ht.plcp_err), + le32_to_cpu( + priv->statistics.rx.ofdm_ht.plcp_err), + combined_plcp_delta, plcp_msec); + + /* + * Reset the RF radio due to the high plcp + * error rate + */ + iwl_force_rf_reset(priv); + } + } + memcpy(&priv->statistics, &pkt->u.stats, sizeof(priv->statistics)); set_bit(STATUS_STATISTICS, &priv->status); |