From: Michal Krawczyk <mk@semihalf.com>
Date: Thu, 7 Jun 2018 09:43:07 +0000 (+0200)
Subject: net/ena: check for admin queue state
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=5efb9fc7436a82ffc555556f3e1732562a1c1b8b;p=dpdk.git

net/ena: check for admin queue state

The admin queue can stop responding or became inactive due to unexpected
behaviour of the device. In that case, the whole device should be
restarted.

Signed-off-by: Michal Krawczyk <mk@semihalf.com>
---

diff --git a/drivers/net/ena/ena_ethdev.c b/drivers/net/ena/ena_ethdev.c
index 796b6fc0a3..dc253c384c 100644
--- a/drivers/net/ena/ena_ethdev.c
+++ b/drivers/net/ena/ena_ethdev.c
@@ -527,6 +527,8 @@ ena_dev_reset(struct rte_eth_dev *dev)
 	for (i = 0; i < nb_queues; ++i)
 		ena_tx_queue_setup(eth_dev, i, adapter->tx_ring_size, 0, NULL);
 
+	adapter->trigger_reset = false;
+
 	return 0;
 }
 
@@ -1400,21 +1402,40 @@ static void ena_interrupt_handler_rte(void *cb_arg)
 		ena_com_aenq_intr_handler(ena_dev, adapter);
 }
 
+static void check_for_missing_keep_alive(struct ena_adapter *adapter)
+{
+	if (adapter->keep_alive_timeout == ENA_HW_HINTS_NO_TIMEOUT)
+		return;
+
+	if (unlikely((rte_get_timer_cycles() - adapter->timestamp_wd) >=
+	    adapter->keep_alive_timeout)) {
+		RTE_LOG(ERR, PMD, "Keep alive timeout\n");
+		adapter->reset_reason = ENA_REGS_RESET_KEEP_ALIVE_TO;
+		adapter->trigger_reset = true;
+	}
+}
+
+/* Check if admin queue is enabled */
+static void check_for_admin_com_state(struct ena_adapter *adapter)
+{
+	if (unlikely(!ena_com_get_admin_running_state(&adapter->ena_dev))) {
+		RTE_LOG(ERR, PMD, "ENA admin queue is not in running state!\n");
+		adapter->reset_reason = ENA_REGS_RESET_ADMIN_TO;
+		adapter->trigger_reset = true;
+	}
+}
+
 static void ena_timer_wd_callback(__rte_unused struct rte_timer *timer,
 				  void *arg)
 {
 	struct ena_adapter *adapter = (struct ena_adapter *)arg;
 	struct rte_eth_dev *dev = adapter->rte_dev;
 
-	if (adapter->keep_alive_timeout == ENA_HW_HINTS_NO_TIMEOUT)
-		return;
+	check_for_missing_keep_alive(adapter);
+	check_for_admin_com_state(adapter);
 
-	/* Within reasonable timing range no memory barriers are needed */
-	if ((rte_get_timer_cycles() - adapter->timestamp_wd) >=
-	    adapter->keep_alive_timeout) {
-		RTE_LOG(ERR, PMD, "The ENA device is not responding - "
-			"performing device reset...");
-		adapter->reset_reason = ENA_REGS_RESET_KEEP_ALIVE_TO;
+	if (unlikely(adapter->trigger_reset)) {
+		RTE_LOG(ERR, PMD, "Trigger reset is on\n");
 		_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_RESET,
 			NULL);
 	}
diff --git a/drivers/net/ena/ena_ethdev.h b/drivers/net/ena/ena_ethdev.h
index b44cca23e9..1f6a7062fa 100644
--- a/drivers/net/ena/ena_ethdev.h
+++ b/drivers/net/ena/ena_ethdev.h
@@ -194,6 +194,8 @@ struct ena_adapter {
 	struct rte_timer timer_wd;
 	uint64_t timestamp_wd;
 	uint64_t keep_alive_timeout;
+
+	bool trigger_reset;
 };
 
 #endif /* _ENA_ETHDEV_H_ */