ath11k: dp: stop rx pktlog before suspend

Stop dp rx pktlog when entering suspend and reap the mon_status buffer to keep
it empty. During resume restart the reap timer.

Tested-on: QCA6390 hw2.0 PCI WLAN.HST.1.0.1-01740-QCAHSTSWPLZ_V2_TO_X86-1
Signed-off-by: Carl Huang <cjhuang@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/1607708150-21066-7-git-send-email-kvalo@codeaurora.org

drivers/net/wireless/ath/ath11k/dp.h

@@ -40,6 +40,7 @@ struct dp_rx_tid {
 
 #define DP_REO_DESC_FREE_THRESHOLD  64
 #define DP_REO_DESC_FREE_TIMEOUT_MS 1000
+#define DP_MON_PURGE_TIMEOUT_MS     100
 #define DP_MON_SERVICE_BUDGET       128
 
 struct dp_reo_cache_flush_elem {

drivers/net/wireless/ath/ath11k/dp_rx.c

@@ -274,6 +274,28 @@ static void ath11k_dp_service_mon_ring(struct timer_list *t)
 		  msecs_to_jiffies(ATH11K_MON_TIMER_INTERVAL));
 }
 
+static int ath11k_dp_purge_mon_ring(struct ath11k_base *ab)
+{
+	int i, reaped = 0;
+	unsigned long timeout = jiffies + msecs_to_jiffies(DP_MON_PURGE_TIMEOUT_MS);
+
+	do {
+		for (i = 0; i < ab->hw_params.num_rxmda_per_pdev; i++)
+			reaped += ath11k_dp_rx_process_mon_rings(ab, i,
+								 NULL,
+								 DP_MON_SERVICE_BUDGET);
+
+		/* nothing more to reap */
+		if (reaped < DP_MON_SERVICE_BUDGET)
+			return 0;
+
+	} while (time_before(jiffies, timeout));
+
+	ath11k_warn(ab, "dp mon ring purge timeout");
+
+	return -ETIMEDOUT;
+}
+
 /* Returns number of Rx buffers replenished */
 int ath11k_dp_rxbufs_replenish(struct ath11k_base *ab, int mac_id,
 			       struct dp_rxdma_ring *rx_ring,
@@ -5026,3 +5048,29 @@ int ath11k_dp_rx_pdev_mon_detach(struct ath11k *ar)
 	ath11k_dp_mon_link_free(ar);
 	return 0;
 }
+
+int ath11k_dp_rx_pktlog_start(struct ath11k_base *ab)
+{
+	/* start reap timer */
+	mod_timer(&ab->mon_reap_timer,
+		  jiffies + msecs_to_jiffies(ATH11K_MON_TIMER_INTERVAL));
+
+	return 0;
+}
+
+int ath11k_dp_rx_pktlog_stop(struct ath11k_base *ab, bool stop_timer)
+{
+	int ret;
+
+	if (stop_timer)
+		del_timer_sync(&ab->mon_reap_timer);
+
+	/* reap all the monitor related rings */
+	ret = ath11k_dp_purge_mon_ring(ab);
+	if (ret) {
+		ath11k_warn(ab, "failed to purge dp mon ring: %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}

drivers/net/wireless/ath/ath11k/dp_rx.h

@@ -91,4 +91,7 @@ int ath11k_dp_rx_pdev_mon_detach(struct ath11k *ar);
 int ath11k_dp_rx_pdev_mon_attach(struct ath11k *ar);
 int ath11k_peer_rx_frag_setup(struct ath11k *ar, const u8 *peer_mac, int vdev_id);
 
+int ath11k_dp_rx_pktlog_start(struct ath11k_base *ab);
+int ath11k_dp_rx_pktlog_stop(struct ath11k_base *ab, bool stop_timer);
+
 #endif /* ATH11K_DP_RX_H */

drivers/net/wireless/ath/ath11k/mac.c

@@ -4146,6 +4146,10 @@ static int ath11k_mac_config_mon_status_default(struct ath11k *ar, bool enable)
 						       &tlv_filter);
 	}
 
+	if (enable && !ar->ab->hw_params.rxdma1_enable)
+		mod_timer(&ar->ab->mon_reap_timer, jiffies +
+			  msecs_to_jiffies(ATH11K_MON_TIMER_INTERVAL));
+
 	return ret;
 }