iwlwifi: mvm: add trigger for firmware dump upon statistics

It can be very useful to monitor the statistics and trigger
a firmware dump when a certain value hits a certain offset.
Since the statistics are huge, add a generic trigger. When
the DWORD at offset X reaches value Y.

Since there is another trigger before this one I can't add
right now because of a dependency on mac80211, add a
reserved entry to keep the enum in place.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

1 files changed, 30 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/mvm/rx.c b/drivers/net/wireless/iwlwifi/mvm/rx.c
index b86ff66..9b2c537 100644
--- a/drivers/net/wireless/iwlwifi/mvm/rx.c
+++ b/drivers/net/wireless/iwlwifi/mvm/rx.c
@@ -508,6 +508,34 @@ static void iwl_mvm_stat_iterator(void *_data, u8 *mac,
 	}
 }
 
+static inline void
+iwl_mvm_rx_stats_check_trigger(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt)
+{
+	struct iwl_fw_dbg_trigger_tlv *trig;
+	struct iwl_fw_dbg_trigger_stats *trig_stats;
+	u32 trig_offset, trig_thold;
+
+	if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_STATS))
+		return;
+
+	trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_STATS);
+	trig_stats = (void *)trig->data;
+
+	if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
+		return;
+
+	trig_offset = le32_to_cpu(trig_stats->stop_offset);
+	trig_thold = le32_to_cpu(trig_stats->stop_threshold);
+
+	if (WARN_ON_ONCE(trig_offset >= iwl_rx_packet_payload_len(pkt)))
+		return;
+
+	if (le32_to_cpup((__le32 *) (pkt->data + trig_offset)) < trig_thold)
+		return;
+
+	iwl_mvm_fw_dbg_collect_trig(mvm, trig, NULL, 0);
+}
+
 void iwl_mvm_handle_rx_statistics(struct iwl_mvm *mvm,
 				  struct iwl_rx_packet *pkt)
 {
@@ -553,6 +581,8 @@ void iwl_mvm_handle_rx_statistics(struct iwl_mvm *mvm,
 		iwl_mvm_update_rx_statistics(mvm, &stats->rx);
 	}
 
+	iwl_mvm_rx_stats_check_trigger(mvm, pkt);
+
 	/* Only handle rx statistics temperature changes if async temp
 	 * notifications are not supported
 	 */