summaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/iwlwifi/iwl-rx.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-rx.c')
-rw-r--r--drivers/net/wireless/iwlwifi/iwl-rx.c155
1 files changed, 127 insertions, 28 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-rx.c b/drivers/net/wireless/iwlwifi/iwl-rx.c
index 8116aa0d767..2fa30dfb7c5 100644
--- a/drivers/net/wireless/iwlwifi/iwl-rx.c
+++ b/drivers/net/wireless/iwlwifi/iwl-rx.c
@@ -616,29 +616,77 @@ 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)
+/* the threshold ratio of actual_ack_cnt to expected_ack_cnt in percent */
+#define ACK_CNT_RATIO (50)
+#define BA_TIMEOUT_CNT (5)
+#define BA_TIMEOUT_MAX (16)
+
+#if defined(CONFIG_IWLAGN) || defined(CONFIG_IWLAGN_MODULE)
+/**
+ * iwl_good_ack_health - checks for ACK count ratios, BA timeout retries.
+ *
+ * When the ACK count ratio is 0 and aggregated BA timeout retries exceeding
+ * the BA_TIMEOUT_MAX, reload firmware and bring system back to normal
+ * operation state.
+ */
+bool iwl_good_ack_health(struct iwl_priv *priv,
+ struct iwl_rx_packet *pkt)
{
- int change;
- struct iwl_rx_packet *pkt = rxb_addr(rxb);
+ bool rc = true;
+ int actual_ack_cnt_delta, expected_ack_cnt_delta;
+ int ba_timeout_delta;
+
+ actual_ack_cnt_delta =
+ le32_to_cpu(pkt->u.stats.tx.actual_ack_cnt) -
+ le32_to_cpu(priv->statistics.tx.actual_ack_cnt);
+ expected_ack_cnt_delta =
+ le32_to_cpu(pkt->u.stats.tx.expected_ack_cnt) -
+ le32_to_cpu(priv->statistics.tx.expected_ack_cnt);
+ ba_timeout_delta =
+ le32_to_cpu(pkt->u.stats.tx.agg.ba_timeout) -
+ le32_to_cpu(priv->statistics.tx.agg.ba_timeout);
+ if ((priv->_agn.agg_tids_count > 0) &&
+ (expected_ack_cnt_delta > 0) &&
+ (((actual_ack_cnt_delta * 100) / expected_ack_cnt_delta)
+ < ACK_CNT_RATIO) &&
+ (ba_timeout_delta > BA_TIMEOUT_CNT)) {
+ IWL_DEBUG_RADIO(priv, "actual_ack_cnt delta = %d,"
+ " expected_ack_cnt = %d\n",
+ actual_ack_cnt_delta, expected_ack_cnt_delta);
+
+#ifdef CONFIG_IWLWIFI_DEBUG
+ IWL_DEBUG_RADIO(priv, "rx_detected_cnt delta = %d\n",
+ priv->delta_statistics.tx.rx_detected_cnt);
+ IWL_DEBUG_RADIO(priv,
+ "ack_or_ba_timeout_collision delta = %d\n",
+ priv->delta_statistics.tx.
+ ack_or_ba_timeout_collision);
+#endif
+ IWL_DEBUG_RADIO(priv, "agg ba_timeout delta = %d\n",
+ ba_timeout_delta);
+ if (!actual_ack_cnt_delta &&
+ (ba_timeout_delta >= BA_TIMEOUT_MAX))
+ rc = false;
+ }
+ return rc;
+}
+EXPORT_SYMBOL(iwl_good_ack_health);
+#endif
+
+/**
+ * iwl_good_plcp_health - checks for plcp error.
+ *
+ * When the plcp error is exceeding the thresholds, reset the radio
+ * to improve the throughput.
+ */
+bool iwl_good_plcp_health(struct iwl_priv *priv,
+ struct iwl_rx_packet *pkt)
+{
+ bool rc = true;
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),
- le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK);
-
- change = ((priv->statistics.general.temperature !=
- pkt->u.stats.general.temperature) ||
- ((priv->statistics.flag &
- STATISTICS_REPLY_FLG_HT40_MODE_MSK) !=
- (pkt->u.stats.flag & STATISTICS_REPLY_FLG_HT40_MODE_MSK)));
-
-#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.
@@ -659,11 +707,11 @@ void iwl_rx_statistics(struct iwl_priv *priv,
le32_to_cpu(priv->statistics.rx.ofdm_ht.plcp_err));
if ((combined_plcp_delta > 0) &&
- ((combined_plcp_delta * 100) / plcp_msec) >
+ ((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:
+ * 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,
@@ -672,22 +720,73 @@ void iwl_rx_statistics(struct iwl_priv *priv,
* combined_plcp_delta,
* plcp_msec
*/
- IWL_DEBUG_RADIO(priv, PLCP_MSG,
+ IWL_DEBUG_RADIO(priv, "plcp_err exceeded %u, "
+ "%u, %u, %u, %u, %d, %u mSecs\n",
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),
+ priv->statistics.rx.ofdm_ht.plcp_err),
combined_plcp_delta, plcp_msec);
+ rc = false;
+ }
+ }
+ return rc;
+}
+EXPORT_SYMBOL(iwl_good_plcp_health);
- /*
- * Reset the RF radio due to the high plcp
- * error rate
- */
- iwl_force_reset(priv, IWL_RF_RESET);
+static void iwl_recover_from_statistics(struct iwl_priv *priv,
+ struct iwl_rx_packet *pkt)
+{
+ if (test_bit(STATUS_EXIT_PENDING, &priv->status))
+ return;
+ if (iwl_is_associated(priv)) {
+ if (priv->cfg->ops->lib->check_ack_health) {
+ if (!priv->cfg->ops->lib->check_ack_health(
+ priv, pkt)) {
+ /*
+ * low ack count detected
+ * restart Firmware
+ */
+ IWL_ERR(priv, "low ack count detected, "
+ "restart firmware\n");
+ iwl_force_reset(priv, IWL_FW_RESET);
+ }
+ } else if (priv->cfg->ops->lib->check_plcp_health) {
+ if (!priv->cfg->ops->lib->check_plcp_health(
+ priv, pkt)) {
+ /*
+ * high plcp error detected
+ * reset Radio
+ */
+ iwl_force_reset(priv, IWL_RF_RESET);
+ }
}
}
+}
+
+void iwl_rx_statistics(struct iwl_priv *priv,
+ struct iwl_rx_mem_buffer *rxb)
+{
+ int change;
+ struct iwl_rx_packet *pkt = rxb_addr(rxb);
+
+
+ IWL_DEBUG_RX(priv, "Statistics notification received (%d vs %d).\n",
+ (int)sizeof(priv->statistics),
+ le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK);
+
+ change = ((priv->statistics.general.temperature !=
+ pkt->u.stats.general.temperature) ||
+ ((priv->statistics.flag &
+ STATISTICS_REPLY_FLG_HT40_MODE_MSK) !=
+ (pkt->u.stats.flag & STATISTICS_REPLY_FLG_HT40_MODE_MSK)));
+
+#ifdef CONFIG_IWLWIFI_DEBUG
+ iwl_accumulative_statistics(priv, (__le32 *)&pkt->u.stats);
+#endif
+ iwl_recover_from_statistics(priv, pkt);
memcpy(&priv->statistics, &pkt->u.stats, sizeof(priv->statistics));
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-29 14:08:58 +0000