Merge branch 'ena-bug-fixes'

Netanel Belgazal says:

====================
Bug Fixes in ENA driver

Changes from V3:
* Rebase patchset to master and solve merge conflicts.
* Remove redundant bug fix (fix error handling when probe fails)
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/amazon/ena/ena_admin_defs.h

@@ -631,22 +631,22 @@ enum ena_admin_flow_hash_proto {
 /* RSS flow hash fields */
 enum ena_admin_flow_hash_fields {
 	/* Ethernet Dest Addr */
-	ENA_ADMIN_RSS_L2_DA	= 0,
+	ENA_ADMIN_RSS_L2_DA	= BIT(0),
 
 	/* Ethernet Src Addr */
-	ENA_ADMIN_RSS_L2_SA	= 1,
+	ENA_ADMIN_RSS_L2_SA	= BIT(1),
 
 	/* ipv4/6 Dest Addr */
-	ENA_ADMIN_RSS_L3_DA	= 2,
+	ENA_ADMIN_RSS_L3_DA	= BIT(2),
 
 	/* ipv4/6 Src Addr */
-	ENA_ADMIN_RSS_L3_SA	= 5,
+	ENA_ADMIN_RSS_L3_SA	= BIT(3),
 
 	/* tcp/udp Dest Port */
-	ENA_ADMIN_RSS_L4_DP	= 6,
+	ENA_ADMIN_RSS_L4_DP	= BIT(4),
 
 	/* tcp/udp Src Port */
-	ENA_ADMIN_RSS_L4_SP	= 7,
+	ENA_ADMIN_RSS_L4_SP	= BIT(5),
 };
 
 struct ena_admin_proto_input {
@@ -873,6 +873,14 @@ struct ena_admin_aenq_link_change_desc {
 	u32 flags;
 };
 
+struct ena_admin_aenq_keep_alive_desc {
+	struct ena_admin_aenq_common_desc aenq_common_desc;
+
+	u32 rx_drops_low;
+
+	u32 rx_drops_high;
+};
+
 struct ena_admin_ena_mmio_req_read_less_resp {
 	u16 req_id;
 

drivers/net/ethernet/amazon/ena/ena_com.c

@@ -36,9 +36,9 @@
 /*****************************************************************************/
 
 /* Timeout in micro-sec */
-#define ADMIN_CMD_TIMEOUT_US (1000000)
+#define ADMIN_CMD_TIMEOUT_US (3000000)
 
-#define ENA_ASYNC_QUEUE_DEPTH 4
+#define ENA_ASYNC_QUEUE_DEPTH 16
 #define ENA_ADMIN_QUEUE_DEPTH 32
 
 #define MIN_ENA_VER (((ENA_COMMON_SPEC_VERSION_MAJOR) << \
@@ -784,7 +784,7 @@ static int ena_com_get_feature_ex(struct ena_com_dev *ena_dev,
 	int ret;
 
 	if (!ena_com_check_supported_feature_id(ena_dev, feature_id)) {
-		pr_info("Feature %d isn't supported\n", feature_id);
+		pr_debug("Feature %d isn't supported\n", feature_id);
 		return -EPERM;
 	}
 
@@ -1126,7 +1126,13 @@ int ena_com_execute_admin_command(struct ena_com_admin_queue *admin_queue,
 	comp_ctx = ena_com_submit_admin_cmd(admin_queue, cmd, cmd_size,
 					    comp, comp_size);
 	if (unlikely(IS_ERR(comp_ctx))) {
-		pr_err("Failed to submit command [%ld]\n", PTR_ERR(comp_ctx));
+		if (comp_ctx == ERR_PTR(-ENODEV))
+			pr_debug("Failed to submit command [%ld]\n",
+				 PTR_ERR(comp_ctx));
+		else
+			pr_err("Failed to submit command [%ld]\n",
+			       PTR_ERR(comp_ctx));
+
 		return PTR_ERR(comp_ctx);
 	}
 
@@ -1895,7 +1901,7 @@ int ena_com_set_dev_mtu(struct ena_com_dev *ena_dev, int mtu)
 	int ret;
 
 	if (!ena_com_check_supported_feature_id(ena_dev, ENA_ADMIN_MTU)) {
-		pr_info("Feature %d isn't supported\n", ENA_ADMIN_MTU);
+		pr_debug("Feature %d isn't supported\n", ENA_ADMIN_MTU);
 		return -EPERM;
 	}
 
@@ -1948,7 +1954,7 @@ int ena_com_set_hash_function(struct ena_com_dev *ena_dev)
 
 	if (!ena_com_check_supported_feature_id(ena_dev,
 						ENA_ADMIN_RSS_HASH_FUNCTION)) {
-		pr_info("Feature %d isn't supported\n",
+		pr_debug("Feature %d isn't supported\n",
 			 ENA_ADMIN_RSS_HASH_FUNCTION);
 		return -EPERM;
 	}
@@ -2112,7 +2118,8 @@ int ena_com_set_hash_ctrl(struct ena_com_dev *ena_dev)
 
 	if (!ena_com_check_supported_feature_id(ena_dev,
 						ENA_ADMIN_RSS_HASH_INPUT)) {
-		pr_info("Feature %d isn't supported\n", ENA_ADMIN_RSS_HASH_INPUT);
+		pr_debug("Feature %d isn't supported\n",
+			 ENA_ADMIN_RSS_HASH_INPUT);
 		return -EPERM;
 	}
 
@@ -2184,7 +2191,7 @@ int ena_com_set_default_hash_ctrl(struct ena_com_dev *ena_dev)
 	hash_ctrl->selected_fields[ENA_ADMIN_RSS_IP4_FRAG].fields =
 		ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA;
 
-	hash_ctrl->selected_fields[ENA_ADMIN_RSS_IP4_FRAG].fields =
+	hash_ctrl->selected_fields[ENA_ADMIN_RSS_NOT_IP].fields =
 		ENA_ADMIN_RSS_L2_DA | ENA_ADMIN_RSS_L2_SA;
 
 	for (i = 0; i < ENA_ADMIN_RSS_PROTO_NUM; i++) {
@@ -2270,7 +2277,7 @@ int ena_com_indirect_table_set(struct ena_com_dev *ena_dev)
 
 	if (!ena_com_check_supported_feature_id(
 		    ena_dev, ENA_ADMIN_RSS_REDIRECTION_TABLE_CONFIG)) {
-		pr_info("Feature %d isn't supported\n",
+		pr_debug("Feature %d isn't supported\n",
 			 ENA_ADMIN_RSS_REDIRECTION_TABLE_CONFIG);
 		return -EPERM;
 	}
@@ -2444,11 +2451,9 @@ int ena_com_set_host_attributes(struct ena_com_dev *ena_dev)
 
 	int ret;
 
-	if (!ena_com_check_supported_feature_id(ena_dev,
-						ENA_ADMIN_HOST_ATTR_CONFIG)) {
-		pr_warn("Set host attribute isn't supported\n");
-		return -EPERM;
-	}
+	/* Host attribute config is called before ena_com_get_dev_attr_feat
+	 * so ena_com can't check if the feature is supported.
+	 */
 
 	memset(&cmd, 0x0, sizeof(cmd));
 	admin_queue = &ena_dev->admin_queue;
@@ -2542,7 +2547,7 @@ int ena_com_init_interrupt_moderation(struct ena_com_dev *ena_dev)
 
 	if (rc) {
 		if (rc == -EPERM) {
-			pr_info("Feature %d isn't supported\n",
+			pr_debug("Feature %d isn't supported\n",
 				 ENA_ADMIN_INTERRUPT_MODERATION);
 			rc = 0;
 		} else {

drivers/net/ethernet/amazon/ena/ena_com.h

@@ -33,6 +33,7 @@
 #ifndef ENA_COM
 #define ENA_COM
 
+#include <linux/compiler.h>
 #include <linux/delay.h>
 #include <linux/dma-mapping.h>
 #include <linux/gfp.h>

drivers/net/ethernet/amazon/ena/ena_eth_com.c

@@ -45,7 +45,7 @@ static inline struct ena_eth_io_rx_cdesc_base *ena_com_get_next_rx_cdesc(
 	cdesc = (struct ena_eth_io_rx_cdesc_base *)(io_cq->cdesc_addr.virt_addr
 			+ (head_masked * io_cq->cdesc_entry_size_in_bytes));
 
-	desc_phase = (cdesc->status & ENA_ETH_IO_RX_CDESC_BASE_PHASE_MASK) >>
+	desc_phase = (READ_ONCE(cdesc->status) & ENA_ETH_IO_RX_CDESC_BASE_PHASE_MASK) >>
 			ENA_ETH_IO_RX_CDESC_BASE_PHASE_SHIFT;
 
 	if (desc_phase != expected_phase)
@@ -141,7 +141,7 @@ static inline u16 ena_com_cdesc_rx_pkt_get(struct ena_com_io_cq *io_cq,
 
 		ena_com_cq_inc_head(io_cq);
 		count++;
-		last = (cdesc->status & ENA_ETH_IO_RX_CDESC_BASE_LAST_MASK) >>
+		last = (READ_ONCE(cdesc->status) & ENA_ETH_IO_RX_CDESC_BASE_LAST_MASK) >>
 			ENA_ETH_IO_RX_CDESC_BASE_LAST_SHIFT;
 	} while (!last);
 
@@ -489,13 +489,13 @@ int ena_com_tx_comp_req_id_get(struct ena_com_io_cq *io_cq, u16 *req_id)
 	 * expected, it mean that the device still didn't update
 	 * this completion.
 	 */
-	cdesc_phase = cdesc->flags & ENA_ETH_IO_TX_CDESC_PHASE_MASK;
+	cdesc_phase = READ_ONCE(cdesc->flags) & ENA_ETH_IO_TX_CDESC_PHASE_MASK;
 	if (cdesc_phase != expected_phase)
 		return -EAGAIN;
 
 	ena_com_cq_inc_head(io_cq);
 
-	*req_id = cdesc->req_id;
+	*req_id = READ_ONCE(cdesc->req_id);
 
 	return 0;
 }

drivers/net/ethernet/amazon/ena/ena_netdev.c

@@ -80,14 +80,18 @@ static void ena_tx_timeout(struct net_device *dev)
 {
 	struct ena_adapter *adapter = netdev_priv(dev);
 
+	/* Change the state of the device to trigger reset
+	 * Check that we are not in the middle or a trigger already
+	 */
+
+	if (test_and_set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))
+		return;
+
 	u64_stats_update_begin(&adapter->syncp);
 	adapter->dev_stats.tx_timeout++;
 	u64_stats_update_end(&adapter->syncp);
 
 	netif_err(adapter, tx_err, dev, "Transmit time out\n");
-
-	/* Change the state of the device to trigger reset */
-	set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
 }
 
 static void update_rx_ring_mtu(struct ena_adapter *adapter, int mtu)
@@ -559,6 +563,7 @@ static void ena_free_all_rx_bufs(struct ena_adapter *adapter)
  */
 static void ena_free_tx_bufs(struct ena_ring *tx_ring)
 {
+	bool print_once = true;
 	u32 i;
 
 	for (i = 0; i < tx_ring->ring_size; i++) {
@@ -570,9 +575,16 @@ static void ena_free_tx_bufs(struct ena_ring *tx_ring)
 		if (!tx_info->skb)
 			continue;
 
+		if (print_once) {
 			netdev_notice(tx_ring->netdev,
 				      "free uncompleted tx skb qid %d idx 0x%x\n",
 				      tx_ring->qid, i);
+			print_once = false;
+		} else {
+			netdev_dbg(tx_ring->netdev,
+				   "free uncompleted tx skb qid %d idx 0x%x\n",
+				   tx_ring->qid, i);
+		}
 
 		ena_buf = tx_info->bufs;
 		dma_unmap_single(tx_ring->dev,
@@ -1109,7 +1121,8 @@ static int ena_io_poll(struct napi_struct *napi, int budget)
 
 	tx_budget = tx_ring->ring_size / ENA_TX_POLL_BUDGET_DIVIDER;
 
-	if (!test_bit(ENA_FLAG_DEV_UP, &tx_ring->adapter->flags)) {
+	if (!test_bit(ENA_FLAG_DEV_UP, &tx_ring->adapter->flags) ||
+	    test_bit(ENA_FLAG_TRIGGER_RESET, &tx_ring->adapter->flags)) {
 		napi_complete_done(napi, 0);
 		return 0;
 	}
@@ -1117,26 +1130,40 @@ static int ena_io_poll(struct napi_struct *napi, int budget)
 	tx_work_done = ena_clean_tx_irq(tx_ring, tx_budget);
 	rx_work_done = ena_clean_rx_irq(rx_ring, napi, budget);
 
-	if ((budget > rx_work_done) && (tx_budget > tx_work_done)) {
-		napi_complete_done(napi, rx_work_done);
+	/* If the device is about to reset or down, avoid unmask
+	 * the interrupt and return 0 so NAPI won't reschedule
+	 */
+	if (unlikely(!test_bit(ENA_FLAG_DEV_UP, &tx_ring->adapter->flags) ||
+		     test_bit(ENA_FLAG_TRIGGER_RESET, &tx_ring->adapter->flags))) {
+		napi_complete_done(napi, 0);
+		ret = 0;
 
+	} else if ((budget > rx_work_done) && (tx_budget > tx_work_done)) {
 		napi_comp_call = 1;
+
+		/* Update numa and unmask the interrupt only when schedule
+		 * from the interrupt context (vs from sk_busy_loop)
+		 */
+		if (napi_complete_done(napi, rx_work_done)) {
 			/* Tx and Rx share the same interrupt vector */
 			if (ena_com_get_adaptive_moderation_enabled(rx_ring->ena_dev))
 				ena_adjust_intr_moderation(rx_ring, tx_ring);
 
-		/* Update intr register: rx intr delay, tx intr delay and
-		 * interrupt unmask
+			/* Update intr register: rx intr delay,
+			 * tx intr delay and interrupt unmask
 			 */
 			ena_com_update_intr_reg(&intr_reg,
 						rx_ring->smoothed_interval,
 						tx_ring->smoothed_interval,
 						true);
 
-		/* It is a shared MSI-X. Tx and Rx CQ have pointer to it.
+			/* It is a shared MSI-X.
+			 * Tx and Rx CQ have pointer to it.
 			 * So we use one of them to reach the intr reg
 			 */
 			ena_com_unmask_intr(rx_ring->ena_com_io_cq, &intr_reg);
+		}
+
 
 		ena_update_ring_numa_node(tx_ring, rx_ring);
 
@@ -1698,12 +1725,22 @@ static void ena_down(struct ena_adapter *adapter)
 	adapter->dev_stats.interface_down++;
 	u64_stats_update_end(&adapter->syncp);
 
-	/* After this point the napi handler won't enable the tx queue */
-	ena_napi_disable_all(adapter);
 	netif_carrier_off(adapter->netdev);
 	netif_tx_disable(adapter->netdev);
 
+	/* After this point the napi handler won't enable the tx queue */
+	ena_napi_disable_all(adapter);
+
 	/* After destroy the queue there won't be any new interrupts */
+
+	if (test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags)) {
+		int rc;
+
+		rc = ena_com_dev_reset(adapter->ena_dev);
+		if (rc)
+			dev_err(&adapter->pdev->dev, "Device reset failed\n");
+	}
+
 	ena_destroy_all_io_queues(adapter);
 
 	ena_disable_io_intr_sync(adapter);
@@ -2065,6 +2102,14 @@ static void ena_netpoll(struct net_device *netdev)
 	struct ena_adapter *adapter = netdev_priv(netdev);
 	int i;
 
+	/* Dont schedule NAPI if the driver is in the middle of reset
+	 * or netdev is down.
+	 */
+
+	if (!test_bit(ENA_FLAG_DEV_UP, &adapter->flags) ||
+	    test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))
+		return;
+
 	for (i = 0; i < adapter->num_queues; i++)
 		napi_schedule(&adapter->ena_napi[i].napi);
 }
@@ -2169,28 +2214,46 @@ static void ena_get_stats64(struct net_device *netdev,
 			    struct rtnl_link_stats64 *stats)
 {
 	struct ena_adapter *adapter = netdev_priv(netdev);
-	struct ena_admin_basic_stats ena_stats;
-	int rc;
+	struct ena_ring *rx_ring, *tx_ring;
+	unsigned int start;
+	u64 rx_drops;
+	int i;
 
 	if (!test_bit(ENA_FLAG_DEV_UP, &adapter->flags))
 		return;
 
-	rc = ena_com_get_dev_basic_stats(adapter->ena_dev, &ena_stats);
-	if (rc)
-		return;
+	for (i = 0; i < adapter->num_queues; i++) {
+		u64 bytes, packets;
 
-	stats->tx_bytes = ((u64)ena_stats.tx_bytes_high << 32) |
-		ena_stats.tx_bytes_low;
-	stats->rx_bytes = ((u64)ena_stats.rx_bytes_high << 32) |
-		ena_stats.rx_bytes_low;
+		tx_ring = &adapter->tx_ring[i];
 
-	stats->rx_packets = ((u64)ena_stats.rx_pkts_high << 32) |
-		ena_stats.rx_pkts_low;
-	stats->tx_packets = ((u64)ena_stats.tx_pkts_high << 32) |
-		ena_stats.tx_pkts_low;
+		do {
+			start = u64_stats_fetch_begin_irq(&tx_ring->syncp);
+			packets = tx_ring->tx_stats.cnt;
+			bytes = tx_ring->tx_stats.bytes;
+		} while (u64_stats_fetch_retry_irq(&tx_ring->syncp, start));
 
-	stats->rx_dropped = ((u64)ena_stats.rx_drops_high << 32) |
-		ena_stats.rx_drops_low;
+		stats->tx_packets += packets;
+		stats->tx_bytes += bytes;
+
+		rx_ring = &adapter->rx_ring[i];
+
+		do {
+			start = u64_stats_fetch_begin_irq(&rx_ring->syncp);
+			packets = rx_ring->rx_stats.cnt;
+			bytes = rx_ring->rx_stats.bytes;
+		} while (u64_stats_fetch_retry_irq(&rx_ring->syncp, start));
+
+		stats->rx_packets += packets;
+		stats->rx_bytes += bytes;
+	}
+
+	do {
+		start = u64_stats_fetch_begin_irq(&adapter->syncp);
+		rx_drops = adapter->dev_stats.rx_drops;
+	} while (u64_stats_fetch_retry_irq(&adapter->syncp, start));
+
+	stats->rx_dropped = rx_drops;
 
 	stats->multicast = 0;
 	stats->collisions = 0;
@@ -2351,6 +2414,8 @@ static int ena_device_init(struct ena_com_dev *ena_dev, struct pci_dev *pdev,
 	 */
 	ena_com_set_admin_polling_mode(ena_dev, true);
 
+	ena_config_host_info(ena_dev);
+
 	/* Get Device Attributes*/
 	rc = ena_com_get_dev_attr_feat(ena_dev, get_feat_ctx);
 	if (rc) {
@@ -2375,11 +2440,10 @@ static int ena_device_init(struct ena_com_dev *ena_dev, struct pci_dev *pdev,
 
 	*wd_state = !!(aenq_groups & BIT(ENA_ADMIN_KEEP_ALIVE));
 
-	ena_config_host_info(ena_dev);
-
 	return 0;
 
 err_admin_init:
+	ena_com_delete_host_info(ena_dev);
 	ena_com_admin_destroy(ena_dev);
 err_mmio_read_less:
 	ena_com_mmio_reg_read_request_destroy(ena_dev);
@@ -2431,6 +2495,14 @@ static void ena_fw_reset_device(struct work_struct *work)
 	bool dev_up, wd_state;
 	int rc;
 
+	if (unlikely(!test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))) {
+		dev_err(&pdev->dev,
+			"device reset schedule while reset bit is off\n");
+		return;
+	}
+
+	netif_carrier_off(netdev);
+
 	del_timer_sync(&adapter->timer_service);
 
 	rtnl_lock();
@@ -2444,12 +2516,6 @@ static void ena_fw_reset_device(struct work_struct *work)
 	 */
 	ena_close(netdev);
 
-	rc = ena_com_dev_reset(ena_dev);
-	if (rc) {
-		dev_err(&pdev->dev, "Device reset failed\n");
-		goto err;
-	}
-
 	ena_free_mgmnt_irq(adapter);
 
 	ena_disable_msix(adapter);
@@ -2462,6 +2528,8 @@ static void ena_fw_reset_device(struct work_struct *work)
 
 	ena_com_mmio_reg_read_request_destroy(ena_dev);
 
+	clear_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
+
 	/* Finish with the destroy part. Start the init part */
 
 	rc = ena_device_init(ena_dev, adapter->pdev, &get_feat_ctx, &wd_state);
@@ -2507,6 +2575,8 @@ static void ena_fw_reset_device(struct work_struct *work)
 err:
 	rtnl_unlock();
 
+	clear_bit(ENA_FLAG_DEVICE_RUNNING, &adapter->flags);
+
 	dev_err(&pdev->dev,
 		"Reset attempt failed. Can not reset the device\n");
 }
@@ -2525,6 +2595,9 @@ static void check_for_missing_tx_completions(struct ena_adapter *adapter)
 	if (!test_bit(ENA_FLAG_DEV_UP, &adapter->flags))
 		return;
 
+	if (test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))
+		return;
+
 	budget = ENA_MONITORED_TX_QUEUES;
 
 	for (i = adapter->last_monitored_tx_qid; i < adapter->num_queues; i++) {
@@ -2624,7 +2697,7 @@ static void ena_timer_service(unsigned long data)
 	if (host_info)
 		ena_update_host_info(host_info, adapter->netdev);
 
-	if (unlikely(test_and_clear_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))) {
+	if (unlikely(test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))) {
 		netif_err(adapter, drv, adapter->netdev,
 			  "Trigger reset is on\n");
 		ena_dump_stats_to_dmesg(adapter);
@@ -2658,7 +2731,7 @@ static int ena_calc_io_queue_num(struct pci_dev *pdev,
 		io_sq_num = get_feat_ctx->max_queues.max_sq_num;
 	}
 
-	io_queue_num = min_t(int, num_possible_cpus(), ENA_MAX_NUM_IO_QUEUES);
+	io_queue_num = min_t(int, num_online_cpus(), ENA_MAX_NUM_IO_QUEUES);
 	io_queue_num = min_t(int, io_queue_num, io_sq_num);
 	io_queue_num = min_t(int, io_queue_num,
 			     get_feat_ctx->max_queues.max_cq_num);
@@ -2720,7 +2793,6 @@ static void ena_set_dev_offloads(struct ena_com_dev_get_features_ctx *feat,
 	netdev->features =
 		dev_features |
 		NETIF_F_SG |
-		NETIF_F_NTUPLE |
 		NETIF_F_RXHASH |
 		NETIF_F_HIGHDMA;
 
@@ -3116,6 +3188,8 @@ static void ena_remove(struct pci_dev *pdev)
 
 	cancel_work_sync(&adapter->resume_io_task);
 
+	/* Reset the device only if the device is running. */
+	if (test_bit(ENA_FLAG_DEVICE_RUNNING, &adapter->flags))
 		ena_com_dev_reset(ena_dev);
 
 	ena_free_mgmnt_irq(adapter);

drivers/net/ethernet/amazon/ena/ena_netdev.h

@@ -44,7 +44,7 @@
 #include "ena_eth_com.h"
 
 #define DRV_MODULE_VER_MAJOR	1
-#define DRV_MODULE_VER_MINOR	0
+#define DRV_MODULE_VER_MINOR	1
 #define DRV_MODULE_VER_SUBMINOR 2
 
 #define DRV_MODULE_NAME		"ena"
@@ -100,7 +100,7 @@
 /* Number of queues to check for missing queues per timer service */
 #define ENA_MONITORED_TX_QUEUES	4
 /* Max timeout packets before device reset */
-#define MAX_NUM_OF_TIMEOUTED_PACKETS 32
+#define MAX_NUM_OF_TIMEOUTED_PACKETS 128
 
 #define ENA_TX_RING_IDX_NEXT(idx, ring_size) (((idx) + 1) & ((ring_size) - 1))
 
@@ -116,9 +116,9 @@
 #define ENA_IO_IRQ_IDX(q)		(ENA_IO_IRQ_FIRST_IDX + (q))
 
 /* ENA device should send keep alive msg every 1 sec.
- * We wait for 3 sec just to be on the safe side.
+ * We wait for 6 sec just to be on the safe side.
  */
-#define ENA_DEVICE_KALIVE_TIMEOUT	(3 * HZ)
+#define ENA_DEVICE_KALIVE_TIMEOUT	(6 * HZ)
 
 #define ENA_MMIO_DISABLE_REG_READ	BIT(0)
 
@@ -241,6 +241,7 @@ struct ena_stats_dev {
 	u64 interface_up;
 	u64 interface_down;
 	u64 admin_q_pause;
+	u64 rx_drops;
 };
 
 enum ena_flags_t {