Print the ethtool stats and skb diagnostic information as part of Tx hang
devlink health dump.

Move the declarations of ethtool functions that devlink health uses out
to a new file: ice_ethtool_common.h

To utilize our existing ethtool code in this context, convert it to
non-static.

Reviewed-by: Igor Bagnucki <igor.bagnucki@intel.com>
Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Mateusz Polchlopek <mateusz.polchlopek@intel.com>
Tested-by: Pucha Himasekhar Reddy <himasekharx.reddy.pucha@intel.com> (A Contingent worker at Intel)
Signed-off-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
---
 drivers/net/ethernet/intel/ice/ice_ethtool.h  |  2 +
 .../ethernet/intel/ice/ice_ethtool_common.h   | 19 ++++++++++
 .../net/ethernet/intel/ice/devlink/health.c   | 37 +++++++++++++++++++
 drivers/net/ethernet/intel/ice/ice_ethtool.c  | 10 ++---
 4 files changed, 63 insertions(+), 5 deletions(-)
 create mode 100644 drivers/net/ethernet/intel/ice/ice_ethtool_common.h

diff --git a/drivers/net/ethernet/intel/ice/ice_ethtool.h b/drivers/net/ethernet/intel/ice/ice_ethtool.h
index 9acccae38625..fd021d2813f8 100644
--- a/drivers/net/ethernet/intel/ice/ice_ethtool.h
+++ b/drivers/net/ethernet/intel/ice/ice_ethtool.h
@@ -4,6 +4,8 @@
 #ifndef _ICE_ETHTOOL_H_
 #define _ICE_ETHTOOL_H_
 
+#include "ice_ethtool_common.h"
+
 struct ice_phy_type_to_ethtool {
 	u64 aq_link_speed;
 	u8 link_mode;
diff --git a/drivers/net/ethernet/intel/ice/ice_ethtool_common.h b/drivers/net/ethernet/intel/ice/ice_ethtool_common.h
new file mode 100644
index 000000000000..0c772056f006
--- /dev/null
+++ b/drivers/net/ethernet/intel/ice/ice_ethtool_common.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (c) 2024, Intel Corporation. */
+
+#ifndef _ICE_ETHTOOL_COMMON_H_
+#define _ICE_ETHTOOL_COMMON_H_
+
+/**
+ * DOC: ice_ethtool_common.h
+ *
+ * This header is for ethtool related code that is reused in other places.
+ */
+
+void ice_get_strings(struct net_device *netdev, u32 stringset, u8 *data);
+int ice_get_sset_count(struct net_device *netdev, int sset);
+void ice_get_ethtool_stats(struct net_device *netdev,
+			   struct ethtool_stats __always_unused *stats,
+			   u64 *data);
+
+#endif /* _ICE_ETHTOOL_COMMON_H_ */
diff --git a/drivers/net/ethernet/intel/ice/devlink/health.c b/drivers/net/ethernet/intel/ice/devlink/health.c
index b8c5a1c372dc..1626c5171152 100644
--- a/drivers/net/ethernet/intel/ice/devlink/health.c
+++ b/drivers/net/ethernet/intel/ice/devlink/health.c
@@ -3,6 +3,7 @@
 
 #include "health.h"
 #include "ice.h"
+#include "ice_ethtool_common.h"
 
 #define ICE_DEVLINK_FMSG_PUT_FIELD(fmsg, obj, name) \
 	devlink_fmsg_put(fmsg, #name, (obj)->name)
@@ -26,6 +27,36 @@ static void ice_devlink_health_report(struct devlink_health_reporter *reporter,
 	devlink_health_report(reporter, msg, priv_ctx);
 }
 
+static void ice_dump_ethtool_stats_to_fmsg(struct devlink_fmsg *fmsg,
+					   struct net_device *netdev)
+{
+	const u32 string_set = ETH_SS_STATS;
+	u64 *stats;
+	u8 *names;
+	int scnt;
+
+	scnt = ice_get_sset_count(netdev, string_set);
+	devlink_fmsg_put(fmsg, "stats-cnt", (u32)scnt);
+	if (scnt <= 0)
+		return;
+
+	names = kcalloc(scnt, ETH_GSTRING_LEN, GFP_KERNEL);
+	stats = kcalloc(scnt, sizeof(*stats), GFP_KERNEL);
+	if (!names || !stats)
+		goto out;
+
+	ice_get_strings(netdev, string_set, names);
+	ice_get_ethtool_stats(netdev, NULL, stats);
+
+	devlink_fmsg_obj_nest_start(fmsg);
+	for (int i = 0; i < scnt; ++i)
+		devlink_fmsg_put(fmsg, &names[i * ETH_GSTRING_LEN], stats[i]);
+	devlink_fmsg_obj_nest_end(fmsg);
+out:
+	kfree(names);
+	kfree(stats);
+}
+
 /**
  * ice_fmsg_put_ptr - put hex value of pointer into fmsg
  *
@@ -57,6 +88,9 @@ static int ice_tx_hang_reporter_dump(struct devlink_health_reporter *reporter,
 				     struct netlink_ext_ack *extack)
 {
 	struct ice_tx_hang_event *event = priv_ctx;
+	struct sk_buff *skb;
+
+	skb = event->tx_ring->tx_buf->skb;
 
 	if (!event)
 		return 0;
@@ -71,8 +105,11 @@ static int ice_tx_hang_reporter_dump(struct devlink_health_reporter *reporter,
 	devlink_fmsg_put(fmsg, "irq-mapping", event->tx_ring->q_vector->name);
 	ice_fmsg_put_ptr(fmsg, "desc-ptr", event->tx_ring->desc);
 	ice_fmsg_put_ptr(fmsg, "dma-ptr", (void *)(long)event->tx_ring->dma);
+	ice_fmsg_put_ptr(fmsg, "skb-ptr", skb);
 	devlink_fmsg_binary_pair_put(fmsg, "desc", event->tx_ring->desc,
 				     event->tx_ring->count * sizeof(struct ice_tx_desc));
+	devlink_fmsg_dump_skb(fmsg, skb);
+	ice_dump_ethtool_stats_to_fmsg(fmsg, event->tx_ring->vsi->netdev);
 	devlink_fmsg_obj_nest_end(fmsg);
 
 	return 0;
diff --git a/drivers/net/ethernet/intel/ice/ice_ethtool.c b/drivers/net/ethernet/intel/ice/ice_ethtool.c
index 2924ac61300d..85a3b2326e7b 100644
--- a/drivers/net/ethernet/intel/ice/ice_ethtool.c
+++ b/drivers/net/ethernet/intel/ice/ice_ethtool.c
@@ -1529,7 +1529,7 @@ __ice_get_strings(struct net_device *netdev, u32 stringset, u8 *data,
 	}
 }
 
-static void ice_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
+void ice_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
 {
 	struct ice_netdev_priv *np = netdev_priv(netdev);
 
@@ -1909,7 +1909,7 @@ static int ice_set_priv_flags(struct net_device *netdev, u32 flags)
 	return ret;
 }
 
-static int ice_get_sset_count(struct net_device *netdev, int sset)
+int ice_get_sset_count(struct net_device *netdev, int sset)
 {
 	switch (sset) {
 	case ETH_SS_STATS:
@@ -2012,9 +2012,9 @@ __ice_get_ethtool_stats(struct net_device *netdev,
 	}
 }
 
-static void
-ice_get_ethtool_stats(struct net_device *netdev,
-		      struct ethtool_stats __always_unused *stats, u64 *data)
+void ice_get_ethtool_stats(struct net_device *netdev,
+			   struct ethtool_stats __always_unused *stats,
+			   u64 *data)
 {
 	struct ice_netdev_priv *np = netdev_priv(netdev);
 
-- 
2.39.3