diff mbox series

[v1,net-next,1/6] net: ena: Add a counter for driver's reset failures

Message ID 20240506070453.17054-2-darinzon@amazon.com (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series ENA driver changes May 2024 | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 926 this patch: 926
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers warning 3 maintainers not CCed: pabeni@redhat.com edumazet@google.com ahmed.zaki@intel.com
netdev/build_clang success Errors and warnings before: 937 this patch: 937
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 937 this patch: 937
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 74 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0
netdev/contest success net-next-2024-05-08--00-00 (tests: 1002)

Commit Message

Arinzon, David May 6, 2024, 7:04 a.m. UTC 
From: David Arinzon <darinzon@amazon.com>

This patch adds a counter to the ena_adapter struct in
order to keep track of reset failures.
The counter is incremented every time either ena_restore_device()
or ena_destroy_device() fail.

Signed-off-by: Osama Abboud <osamaabb@amazon.com>
Signed-off-by: David Arinzon <darinzon@amazon.com>
---
 drivers/net/ethernet/amazon/ena/ena_ethtool.c |  1 +
 drivers/net/ethernet/amazon/ena/ena_netdev.c  | 18 ++++++++++++------
 drivers/net/ethernet/amazon/ena/ena_netdev.h  |  1 +
 3 files changed, 14 insertions(+), 6 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/amazon/ena/ena_ethtool.c b/drivers/net/ethernet/amazon/ena/ena_ethtool.c
index 0cb6cc1c..28583db8 100644
--- a/drivers/net/ethernet/amazon/ena/ena_ethtool.c
+++ b/drivers/net/ethernet/amazon/ena/ena_ethtool.c
@@ -49,6 +49,7 @@  static const struct ena_stats ena_stats_global_strings[] = {
 	ENA_STAT_GLOBAL_ENTRY(interface_up),
 	ENA_STAT_GLOBAL_ENTRY(interface_down),
 	ENA_STAT_GLOBAL_ENTRY(admin_q_pause),
+	ENA_STAT_GLOBAL_ENTRY(reset_fail),
 };
 
 static const struct ena_stats ena_stats_eni_strings[] = {
diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c
index be5acfa4..683088af 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
@@ -42,7 +42,7 @@  MODULE_DEVICE_TABLE(pci, ena_pci_tbl);
 
 static int ena_rss_init_default(struct ena_adapter *adapter);
 static void check_for_admin_com_state(struct ena_adapter *adapter);
-static void ena_destroy_device(struct ena_adapter *adapter, bool graceful);
+static int ena_destroy_device(struct ena_adapter *adapter, bool graceful);
 static int ena_restore_device(struct ena_adapter *adapter);
 
 static void ena_tx_timeout(struct net_device *dev, unsigned int txqueue)
@@ -3235,14 +3235,15 @@  err_disable_msix:
 	return rc;
 }
 
-static void ena_destroy_device(struct ena_adapter *adapter, bool graceful)
+static int ena_destroy_device(struct ena_adapter *adapter, bool graceful)
 {
 	struct net_device *netdev = adapter->netdev;
 	struct ena_com_dev *ena_dev = adapter->ena_dev;
 	bool dev_up;
+	int rc = 0;
 
 	if (!test_bit(ENA_FLAG_DEVICE_RUNNING, &adapter->flags))
-		return;
+		return 0;
 
 	netif_carrier_off(netdev);
 
@@ -3260,7 +3261,7 @@  static void ena_destroy_device(struct ena_adapter *adapter, bool graceful)
 	 *  and device is up, ena_down() already reset the device.
 	 */
 	if (!(test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags) && dev_up))
-		ena_com_dev_reset(adapter->ena_dev, adapter->reset_reason);
+		rc = ena_com_dev_reset(adapter->ena_dev, adapter->reset_reason);
 
 	ena_free_mgmnt_irq(adapter);
 
@@ -3279,6 +3280,8 @@  static void ena_destroy_device(struct ena_adapter *adapter, bool graceful)
 
 	clear_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
 	clear_bit(ENA_FLAG_DEVICE_RUNNING, &adapter->flags);
+
+	return rc;
 }
 
 static int ena_restore_device(struct ena_adapter *adapter)
@@ -3355,14 +3358,17 @@  err:
 
 static void ena_fw_reset_device(struct work_struct *work)
 {
+	int rc = 0;
+
 	struct ena_adapter *adapter =
 		container_of(work, struct ena_adapter, reset_task);
 
 	rtnl_lock();
 
 	if (likely(test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))) {
-		ena_destroy_device(adapter, false);
-		ena_restore_device(adapter);
+		rc |= ena_destroy_device(adapter, false);
+		rc |= ena_restore_device(adapter);
+		adapter->dev_stats.reset_fail += !!rc;
 
 		dev_err(&adapter->pdev->dev, "Device reset completed successfully\n");
 	}
diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.h b/drivers/net/ethernet/amazon/ena/ena_netdev.h
index 6d2cc202..d5950974 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.h
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.h
@@ -290,6 +290,7 @@  struct ena_stats_dev {
 	u64 admin_q_pause;
 	u64 rx_drops;
 	u64 tx_drops;
+	u64 reset_fail;
 };
 
 enum ena_flags_t {