Merge branch 'topic/cs35l41' into for-next

Pull CS35L41 codec updates

Signed-off-by: Takashi Iwai <tiwai@suse.de>

5 files changed, 568 insertions, 51 deletions

diff --git a/drivers/net/netdevsim/Makefile b/drivers/net/netdevsim/Makefile
index a1cbfa44a1e1..5735e5b1a2cb 100644
--- a/drivers/net/netdevsim/Makefile
+++ b/drivers/net/netdevsim/Makefile
@@ -3,7 +3,7 @@
 obj-$(CONFIG_NETDEVSIM) += netdevsim.o
 
 netdevsim-objs := \
-	netdev.o dev.o ethtool.o fib.o bus.o health.o udp_tunnels.o
+	netdev.o dev.o ethtool.o fib.o bus.o health.o hwstats.o udp_tunnels.o
 
 ifeq ($(CONFIG_BPF_SYSCALL),y)
 netdevsim-objs += \
diff --git a/drivers/net/netdevsim/dev.c b/drivers/net/netdevsim/dev.c
index 08d7b465a0de..57a3ac893792 100644
--- a/drivers/net/netdevsim/dev.c
+++ b/drivers/net/netdevsim/dev.c
@@ -59,7 +59,7 @@ static struct dentry *nsim_dev_ddir;
 unsigned int nsim_dev_get_vfs(struct nsim_dev *nsim_dev)
 {
 	WARN_ON(!lockdep_rtnl_is_held() &&
-		!lockdep_is_held(&nsim_dev->vfs_lock));
+		!devl_lock_is_held(priv_to_devlink(nsim_dev)));
 
 	return nsim_dev->nsim_bus_dev->num_vfs;
 }
@@ -275,7 +275,7 @@ static ssize_t nsim_bus_dev_max_vfs_write(struct file *file,
 		return -ENOMEM;
 
 	nsim_dev = file->private_data;
-	mutex_lock(&nsim_dev->vfs_lock);
+	devl_lock(priv_to_devlink(nsim_dev));
 	/* Reject if VFs are configured */
 	if (nsim_dev_get_vfs(nsim_dev)) {
 		ret = -EBUSY;
@@ -285,7 +285,7 @@ static ssize_t nsim_bus_dev_max_vfs_write(struct file *file,
 		*ppos += count;
 		ret = count;
 	}
-	mutex_unlock(&nsim_dev->vfs_lock);
+	devl_unlock(priv_to_devlink(nsim_dev));
 
 	kfree(vfconfigs);
 	return ret;
@@ -339,6 +339,7 @@ static int nsim_dev_debugfs_init(struct nsim_dev *nsim_dev)
 	debugfs_create_bool("fail_trap_policer_counter_get", 0600,
 			    nsim_dev->ddir,
 			    &nsim_dev->fail_trap_policer_counter_get);
+	/* caution, dev_max_vfs write takes devlink lock */
 	debugfs_create_file("max_vfs", 0600, nsim_dev->ddir,
 			    nsim_dev, &nsim_dev_max_vfs_fops);
 
@@ -567,6 +568,9 @@ static void nsim_dev_dummy_region_exit(struct nsim_dev *nsim_dev)
 	devlink_region_destroy(nsim_dev->dummy_region);
 }
 
+static int
+__nsim_dev_port_add(struct nsim_dev *nsim_dev, enum nsim_dev_port_type type,
+		    unsigned int port_index);
 static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port);
 
 static int nsim_esw_legacy_enable(struct nsim_dev *nsim_dev,
@@ -575,12 +579,10 @@ static int nsim_esw_legacy_enable(struct nsim_dev *nsim_dev,
 	struct devlink *devlink = priv_to_devlink(nsim_dev);
 	struct nsim_dev_port *nsim_dev_port, *tmp;
 
-	devlink_rate_nodes_destroy(devlink);
-	mutex_lock(&nsim_dev->port_list_lock);
+	devl_rate_nodes_destroy(devlink);
 	list_for_each_entry_safe(nsim_dev_port, tmp, &nsim_dev->port_list, list)
 		if (nsim_dev_port_is_vf(nsim_dev_port))
 			__nsim_dev_port_del(nsim_dev_port);
-	mutex_unlock(&nsim_dev->port_list_lock);
 	nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_LEGACY;
 	return 0;
 }
@@ -588,11 +590,11 @@ static int nsim_esw_legacy_enable(struct nsim_dev *nsim_dev,
 static int nsim_esw_switchdev_enable(struct nsim_dev *nsim_dev,
 				     struct netlink_ext_ack *extack)
 {
-	struct nsim_bus_dev *nsim_bus_dev = nsim_dev->nsim_bus_dev;
+	struct nsim_dev_port *nsim_dev_port, *tmp;
 	int i, err;
 
 	for (i = 0; i < nsim_dev_get_vfs(nsim_dev); i++) {
-		err = nsim_drv_port_add(nsim_bus_dev, NSIM_DEV_PORT_TYPE_VF, i);
+		err = __nsim_dev_port_add(nsim_dev, NSIM_DEV_PORT_TYPE_VF, i);
 		if (err) {
 			NL_SET_ERR_MSG_MOD(extack, "Failed to initialize VFs' netdevsim ports");
 			pr_err("Failed to initialize VF id=%d. %d.\n", i, err);
@@ -603,8 +605,9 @@ static int nsim_esw_switchdev_enable(struct nsim_dev *nsim_dev,
 	return 0;
 
 err_port_add_vfs:
-	for (i--; i >= 0; i--)
-		nsim_drv_port_del(nsim_bus_dev, NSIM_DEV_PORT_TYPE_VF, i);
+	list_for_each_entry_safe(nsim_dev_port, tmp, &nsim_dev->port_list, list)
+		if (nsim_dev_port_is_vf(nsim_dev_port))
+			__nsim_dev_port_del(nsim_dev_port);
 	return err;
 }
 
@@ -612,22 +615,16 @@ static int nsim_devlink_eswitch_mode_set(struct devlink *devlink, u16 mode,
 					 struct netlink_ext_ack *extack)
 {
 	struct nsim_dev *nsim_dev = devlink_priv(devlink);
-	int err = 0;
 
-	mutex_lock(&nsim_dev->vfs_lock);
 	if (mode == nsim_dev->esw_mode)
-		goto unlock;
+		return 0;
 
 	if (mode == DEVLINK_ESWITCH_MODE_LEGACY)
-		err = nsim_esw_legacy_enable(nsim_dev, extack);
-	else if (mode == DEVLINK_ESWITCH_MODE_SWITCHDEV)
-		err = nsim_esw_switchdev_enable(nsim_dev, extack);
-	else
-		err = -EINVAL;
+		return nsim_esw_legacy_enable(nsim_dev, extack);
+	if (mode == DEVLINK_ESWITCH_MODE_SWITCHDEV)
+		return nsim_esw_switchdev_enable(nsim_dev, extack);
 
-unlock:
-	mutex_unlock(&nsim_dev->vfs_lock);
-	return err;
+	return -EINVAL;
 }
 
 static int nsim_devlink_eswitch_mode_get(struct devlink *devlink, u16 *mode)
@@ -835,14 +832,14 @@ static void nsim_dev_trap_report_work(struct work_struct *work)
 	/* For each running port and enabled packet trap, generate a UDP
 	 * packet with a random 5-tuple and report it.
 	 */
-	mutex_lock(&nsim_dev->port_list_lock);
+	devl_lock(priv_to_devlink(nsim_dev));
 	list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list) {
 		if (!netif_running(nsim_dev_port->ns->netdev))
 			continue;
 
 		nsim_dev_trap_report(nsim_dev_port);
 	}
-	mutex_unlock(&nsim_dev->port_list_lock);
+	devl_unlock(priv_to_devlink(nsim_dev));
 
 	schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw,
 			      msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS));
@@ -924,6 +921,7 @@ static void nsim_dev_traps_exit(struct devlink *devlink)
 {
 	struct nsim_dev *nsim_dev = devlink_priv(devlink);
 
+	/* caution, trap work takes devlink lock */
 	cancel_delayed_work_sync(&nsim_dev->trap_data->trap_report_dw);
 	devlink_traps_unregister(devlink, nsim_traps_arr,
 				 ARRAY_SIZE(nsim_traps_arr));
@@ -1380,8 +1378,8 @@ static int __nsim_dev_port_add(struct nsim_dev *nsim_dev, enum nsim_dev_port_typ
 	memcpy(attrs.switch_id.id, nsim_dev->switch_id.id, nsim_dev->switch_id.id_len);
 	attrs.switch_id.id_len = nsim_dev->switch_id.id_len;
 	devlink_port_attrs_set(devlink_port, &attrs);
-	err = devlink_port_register(priv_to_devlink(nsim_dev), devlink_port,
-				    nsim_dev_port->port_index);
+	err = devl_port_register(priv_to_devlink(nsim_dev), devlink_port,
+				 nsim_dev_port->port_index);
 	if (err)
 		goto err_port_free;
 
@@ -1396,8 +1394,8 @@ static int __nsim_dev_port_add(struct nsim_dev *nsim_dev, enum nsim_dev_port_typ
 	}
 
 	if (nsim_dev_port_is_vf(nsim_dev_port)) {
-		err = devlink_rate_leaf_create(&nsim_dev_port->devlink_port,
-					       nsim_dev_port);
+		err = devl_rate_leaf_create(&nsim_dev_port->devlink_port,
+					    nsim_dev_port);
 		if (err)
 			goto err_nsim_destroy;
 	}
@@ -1412,7 +1410,7 @@ err_nsim_destroy:
 err_port_debugfs_exit:
 	nsim_dev_port_debugfs_exit(nsim_dev_port);
 err_dl_port_unregister:
-	devlink_port_unregister(devlink_port);
+	devl_port_unregister(devlink_port);
 err_port_free:
 	kfree(nsim_dev_port);
 	return err;
@@ -1424,11 +1422,11 @@ static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port)
 
 	list_del(&nsim_dev_port->list);
 	if (nsim_dev_port_is_vf(nsim_dev_port))
-		devlink_rate_leaf_destroy(&nsim_dev_port->devlink_port);
+		devl_rate_leaf_destroy(&nsim_dev_port->devlink_port);
 	devlink_port_type_clear(devlink_port);
 	nsim_destroy(nsim_dev_port->ns);
 	nsim_dev_port_debugfs_exit(nsim_dev_port);
-	devlink_port_unregister(devlink_port);
+	devl_port_unregister(devlink_port);
 	kfree(nsim_dev_port);
 }
 
@@ -1436,11 +1434,11 @@ static void nsim_dev_port_del_all(struct nsim_dev *nsim_dev)
 {
 	struct nsim_dev_port *nsim_dev_port, *tmp;
 
-	mutex_lock(&nsim_dev->port_list_lock);
+	devl_lock(priv_to_devlink(nsim_dev));
 	list_for_each_entry_safe(nsim_dev_port, tmp,
 				 &nsim_dev->port_list, list)
 		__nsim_dev_port_del(nsim_dev_port);
-	mutex_unlock(&nsim_dev->port_list_lock);
+	devl_unlock(priv_to_devlink(nsim_dev));
 }
 
 static int nsim_dev_port_add_all(struct nsim_dev *nsim_dev,
@@ -1449,7 +1447,9 @@ static int nsim_dev_port_add_all(struct nsim_dev *nsim_dev,
 	int i, err;
 
 	for (i = 0; i < port_count; i++) {
+		devl_lock(priv_to_devlink(nsim_dev));
 		err = __nsim_dev_port_add(nsim_dev, NSIM_DEV_PORT_TYPE_PF, i);
+		devl_unlock(priv_to_devlink(nsim_dev));
 		if (err)
 			goto err_port_del_all;
 	}
@@ -1470,7 +1470,6 @@ static int nsim_dev_reload_create(struct nsim_dev *nsim_dev,
 	devlink = priv_to_devlink(nsim_dev);
 	nsim_dev = devlink_priv(devlink);
 	INIT_LIST_HEAD(&nsim_dev->port_list);
-	mutex_init(&nsim_dev->port_list_lock);
 	nsim_dev->fw_update_status = true;
 	nsim_dev->fw_update_overwrite_mask = 0;
 
@@ -1498,10 +1497,14 @@ static int nsim_dev_reload_create(struct nsim_dev *nsim_dev,
 	if (err)
 		goto err_health_exit;
 
-	err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count);
+	err = nsim_dev_hwstats_init(nsim_dev);
 	if (err)
 		goto err_psample_exit;
 
+	err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count);
+	if (err)
+		goto err_hwstats_exit;
+
 	nsim_dev->take_snapshot = debugfs_create_file("take_snapshot",
 						      0200,
 						      nsim_dev->ddir,
@@ -1509,6 +1512,8 @@ static int nsim_dev_reload_create(struct nsim_dev *nsim_dev,
 						&nsim_dev_take_snapshot_fops);
 	return 0;
 
+err_hwstats_exit:
+	nsim_dev_hwstats_exit(nsim_dev);
 err_psample_exit:
 	nsim_dev_psample_exit(nsim_dev);
 err_health_exit:
@@ -1537,8 +1542,6 @@ int nsim_drv_probe(struct nsim_bus_dev *nsim_bus_dev)
 	nsim_dev->switch_id.id_len = sizeof(nsim_dev->switch_id.id);
 	get_random_bytes(nsim_dev->switch_id.id, nsim_dev->switch_id.id_len);
 	INIT_LIST_HEAD(&nsim_dev->port_list);
-	mutex_init(&nsim_dev->vfs_lock);
-	mutex_init(&nsim_dev->port_list_lock);
 	nsim_dev->fw_update_status = true;
 	nsim_dev->fw_update_overwrite_mask = 0;
 	nsim_dev->max_macs = NSIM_DEV_MAX_MACS_DEFAULT;
@@ -1595,15 +1598,21 @@ int nsim_drv_probe(struct nsim_bus_dev *nsim_bus_dev)
 	if (err)
 		goto err_bpf_dev_exit;
 
-	err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count);
+	err = nsim_dev_hwstats_init(nsim_dev);
 	if (err)
 		goto err_psample_exit;
 
+	err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count);
+	if (err)
+		goto err_hwstats_exit;
+
 	nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_LEGACY;
 	devlink_set_features(devlink, DEVLINK_F_RELOAD);
 	devlink_register(devlink);
 	return 0;
 
+err_hwstats_exit:
+	nsim_dev_hwstats_exit(nsim_dev);
 err_psample_exit:
 	nsim_dev_psample_exit(nsim_dev);
 err_bpf_dev_exit:
@@ -1639,21 +1648,21 @@ static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev)
 		return;
 	debugfs_remove(nsim_dev->take_snapshot);
 
-	mutex_lock(&nsim_dev->vfs_lock);
+	devl_lock(devlink);
 	if (nsim_dev_get_vfs(nsim_dev)) {
 		nsim_bus_dev_set_vfs(nsim_dev->nsim_bus_dev, 0);
 		if (nsim_esw_mode_is_switchdev(nsim_dev))
 			nsim_esw_legacy_enable(nsim_dev, NULL);
 	}
-	mutex_unlock(&nsim_dev->vfs_lock);
+	devl_unlock(devlink);
 
 	nsim_dev_port_del_all(nsim_dev);
+	nsim_dev_hwstats_exit(nsim_dev);
 	nsim_dev_psample_exit(nsim_dev);
 	nsim_dev_health_exit(nsim_dev);
 	nsim_fib_destroy(devlink, nsim_dev->fib_data);
 	nsim_dev_traps_exit(devlink);
 	nsim_dev_dummy_region_exit(nsim_dev);
-	mutex_destroy(&nsim_dev->port_list_lock);
 }
 
 void nsim_drv_remove(struct nsim_bus_dev *nsim_bus_dev)
@@ -1693,12 +1702,12 @@ int nsim_drv_port_add(struct nsim_bus_dev *nsim_bus_dev, enum nsim_dev_port_type
 	struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
 	int err;
 
-	mutex_lock(&nsim_dev->port_list_lock);
+	devl_lock(priv_to_devlink(nsim_dev));
 	if (__nsim_dev_port_lookup(nsim_dev, type, port_index))
 		err = -EEXIST;
 	else
 		err = __nsim_dev_port_add(nsim_dev, type, port_index);
-	mutex_unlock(&nsim_dev->port_list_lock);
+	devl_unlock(priv_to_devlink(nsim_dev));
 	return err;
 }
 
@@ -1709,13 +1718,13 @@ int nsim_drv_port_del(struct nsim_bus_dev *nsim_bus_dev, enum nsim_dev_port_type
 	struct nsim_dev_port *nsim_dev_port;
 	int err = 0;
 
-	mutex_lock(&nsim_dev->port_list_lock);
+	devl_lock(priv_to_devlink(nsim_dev));
 	nsim_dev_port = __nsim_dev_port_lookup(nsim_dev, type, port_index);
 	if (!nsim_dev_port)
 		err = -ENOENT;
 	else
 		__nsim_dev_port_del(nsim_dev_port);
-	mutex_unlock(&nsim_dev->port_list_lock);
+	devl_unlock(priv_to_devlink(nsim_dev));
 	return err;
 }
 
@@ -1723,9 +1732,10 @@ int nsim_drv_configure_vfs(struct nsim_bus_dev *nsim_bus_dev,
 			   unsigned int num_vfs)
 {
 	struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
+	struct devlink *devlink = priv_to_devlink(nsim_dev);
 	int ret = 0;
 
-	mutex_lock(&nsim_dev->vfs_lock);
+	devl_lock(devlink);
 	if (nsim_bus_dev->num_vfs == num_vfs)
 		goto exit_unlock;
 	if (nsim_bus_dev->num_vfs && num_vfs) {
@@ -1751,7 +1761,7 @@ int nsim_drv_configure_vfs(struct nsim_bus_dev *nsim_bus_dev,
 	}
 
 exit_unlock:
-	mutex_unlock(&nsim_dev->vfs_lock);
+	devl_unlock(devlink);
 
 	return ret;
 }
diff --git a/drivers/net/netdevsim/fib.c b/drivers/net/netdevsim/fib.c
index 4300261e2f9e..378ee779061c 100644
--- a/drivers/net/netdevsim/fib.c
+++ b/drivers/net/netdevsim/fib.c
@@ -623,14 +623,14 @@ static int nsim_fib6_rt_append(struct nsim_fib_data *data,
 		if (err)
 			goto err_fib6_rt_nh_del;
 
-		fib6_event->rt_arr[i]->trap = true;
+		WRITE_ONCE(fib6_event->rt_arr[i]->trap, true);
 	}
 
 	return 0;
 
 err_fib6_rt_nh_del:
 	for (i--; i >= 0; i--) {
-		fib6_event->rt_arr[i]->trap = false;
+		WRITE_ONCE(fib6_event->rt_arr[i]->trap, false);
 		nsim_fib6_rt_nh_del(fib6_rt, fib6_event->rt_arr[i]);
 	}
 	return err;
diff --git a/drivers/net/netdevsim/hwstats.c b/drivers/net/netdevsim/hwstats.c
new file mode 100644
index 000000000000..605a38e16db0
--- /dev/null
+++ b/drivers/net/netdevsim/hwstats.c
@@ -0,0 +1,486 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/debugfs.h>
+
+#include "netdevsim.h"
+
+#define NSIM_DEV_HWSTATS_TRAFFIC_MS	100
+
+static struct list_head *
+nsim_dev_hwstats_get_list_head(struct nsim_dev_hwstats *hwstats,
+			       enum netdev_offload_xstats_type type)
+{
+	switch (type) {
+	case NETDEV_OFFLOAD_XSTATS_TYPE_L3:
+		return &hwstats->l3_list;
+	}
+
+	WARN_ON_ONCE(1);
+	return NULL;
+}
+
+static void nsim_dev_hwstats_traffic_bump(struct nsim_dev_hwstats *hwstats,
+					  enum netdev_offload_xstats_type type)
+{
+	struct nsim_dev_hwstats_netdev *hwsdev;
+	struct list_head *hwsdev_list;
+
+	hwsdev_list = nsim_dev_hwstats_get_list_head(hwstats, type);
+	if (WARN_ON(!hwsdev_list))
+		return;
+
+	list_for_each_entry(hwsdev, hwsdev_list, list) {
+		if (hwsdev->enabled) {
+			hwsdev->stats.rx_packets += 1;
+			hwsdev->stats.tx_packets += 2;
+			hwsdev->stats.rx_bytes += 100;
+			hwsdev->stats.tx_bytes += 300;
+		}
+	}
+}
+
+static void nsim_dev_hwstats_traffic_work(struct work_struct *work)
+{
+	struct nsim_dev_hwstats *hwstats;
+
+	hwstats = container_of(work, struct nsim_dev_hwstats, traffic_dw.work);
+	mutex_lock(&hwstats->hwsdev_list_lock);
+	nsim_dev_hwstats_traffic_bump(hwstats, NETDEV_OFFLOAD_XSTATS_TYPE_L3);
+	mutex_unlock(&hwstats->hwsdev_list_lock);
+
+	schedule_delayed_work(&hwstats->traffic_dw,
+			      msecs_to_jiffies(NSIM_DEV_HWSTATS_TRAFFIC_MS));
+}
+
+static struct nsim_dev_hwstats_netdev *
+nsim_dev_hwslist_find_hwsdev(struct list_head *hwsdev_list,
+			     int ifindex)
+{
+	struct nsim_dev_hwstats_netdev *hwsdev;
+
+	list_for_each_entry(hwsdev, hwsdev_list, list) {
+		if (hwsdev->netdev->ifindex == ifindex)
+			return hwsdev;
+	}
+
+	return NULL;
+}
+
+static int nsim_dev_hwsdev_enable(struct nsim_dev_hwstats_netdev *hwsdev,
+				  struct netlink_ext_ack *extack)
+{
+	if (hwsdev->fail_enable) {
+		hwsdev->fail_enable = false;
+		NL_SET_ERR_MSG_MOD(extack, "Stats enablement set to fail");
+		return -ECANCELED;
+	}
+
+	hwsdev->enabled = true;
+	return 0;
+}
+
+static void nsim_dev_hwsdev_disable(struct nsim_dev_hwstats_netdev *hwsdev)
+{
+	hwsdev->enabled = false;
+	memset(&hwsdev->stats, 0, sizeof(hwsdev->stats));
+}
+
+static int
+nsim_dev_hwsdev_report_delta(struct nsim_dev_hwstats_netdev *hwsdev,
+			     struct netdev_notifier_offload_xstats_info *info)
+{
+	netdev_offload_xstats_report_delta(info->report_delta, &hwsdev->stats);
+	memset(&hwsdev->stats, 0, sizeof(hwsdev->stats));
+	return 0;
+}
+
+static void
+nsim_dev_hwsdev_report_used(struct nsim_dev_hwstats_netdev *hwsdev,
+			    struct netdev_notifier_offload_xstats_info *info)
+{
+	if (hwsdev->enabled)
+		netdev_offload_xstats_report_used(info->report_used);
+}
+
+static int nsim_dev_hwstats_event_off_xstats(struct nsim_dev_hwstats *hwstats,
+					     struct net_device *dev,
+					     unsigned long event, void *ptr)
+{
+	struct netdev_notifier_offload_xstats_info *info;
+	struct nsim_dev_hwstats_netdev *hwsdev;
+	struct list_head *hwsdev_list;
+	int err = 0;
+
+	info = ptr;
+	hwsdev_list = nsim_dev_hwstats_get_list_head(hwstats, info->type);
+	if (!hwsdev_list)
+		return 0;
+
+	mutex_lock(&hwstats->hwsdev_list_lock);
+
+	hwsdev = nsim_dev_hwslist_find_hwsdev(hwsdev_list, dev->ifindex);
+	if (!hwsdev)
+		goto out;
+
+	switch (event) {
+	case NETDEV_OFFLOAD_XSTATS_ENABLE:
+		err = nsim_dev_hwsdev_enable(hwsdev, info->info.extack);
+		break;
+	case NETDEV_OFFLOAD_XSTATS_DISABLE:
+		nsim_dev_hwsdev_disable(hwsdev);
+		break;
+	case NETDEV_OFFLOAD_XSTATS_REPORT_USED:
+		nsim_dev_hwsdev_report_used(hwsdev, info);
+		break;
+	case NETDEV_OFFLOAD_XSTATS_REPORT_DELTA:
+		err = nsim_dev_hwsdev_report_delta(hwsdev, info);
+		break;
+	}
+
+out:
+	mutex_unlock(&hwstats->hwsdev_list_lock);
+	return err;
+}
+
+static void nsim_dev_hwsdev_fini(struct nsim_dev_hwstats_netdev *hwsdev)
+{
+	dev_put(hwsdev->netdev);
+	kfree(hwsdev);
+}
+
+static void
+__nsim_dev_hwstats_event_unregister(struct nsim_dev_hwstats *hwstats,
+				    struct net_device *dev,
+				    enum netdev_offload_xstats_type type)
+{
+	struct nsim_dev_hwstats_netdev *hwsdev;
+	struct list_head *hwsdev_list;
+
+	hwsdev_list = nsim_dev_hwstats_get_list_head(hwstats, type);
+	if (WARN_ON(!hwsdev_list))
+		return;
+
+	hwsdev = nsim_dev_hwslist_find_hwsdev(hwsdev_list, dev->ifindex);
+	if (!hwsdev)
+		return;
+
+	list_del(&hwsdev->list);
+	nsim_dev_hwsdev_fini(hwsdev);
+}
+
+static void nsim_dev_hwstats_event_unregister(struct nsim_dev_hwstats *hwstats,
+					      struct net_device *dev)
+{
+	mutex_lock(&hwstats->hwsdev_list_lock);
+	__nsim_dev_hwstats_event_unregister(hwstats, dev,
+					    NETDEV_OFFLOAD_XSTATS_TYPE_L3);
+	mutex_unlock(&hwstats->hwsdev_list_lock);
+}
+
+static int nsim_dev_hwstats_event(struct nsim_dev_hwstats *hwstats,
+				  struct net_device *dev,
+				  unsigned long event, void *ptr)
+{
+	switch (event) {
+	case NETDEV_OFFLOAD_XSTATS_ENABLE:
+	case NETDEV_OFFLOAD_XSTATS_DISABLE:
+	case NETDEV_OFFLOAD_XSTATS_REPORT_USED:
+	case NETDEV_OFFLOAD_XSTATS_REPORT_DELTA:
+		return nsim_dev_hwstats_event_off_xstats(hwstats, dev,
+							 event, ptr);
+	case NETDEV_UNREGISTER:
+		nsim_dev_hwstats_event_unregister(hwstats, dev);
+		break;
+	}
+
+	return 0;
+}
+
+static int nsim_dev_netdevice_event(struct notifier_block *nb,
+				    unsigned long event, void *ptr)
+{
+	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
+	struct nsim_dev_hwstats *hwstats;
+	int err = 0;
+
+	hwstats = container_of(nb, struct nsim_dev_hwstats, netdevice_nb);
+	err = nsim_dev_hwstats_event(hwstats, dev, event, ptr);
+	if (err)
+		return notifier_from_errno(err);
+
+	return NOTIFY_OK;
+}
+
+static int
+nsim_dev_hwstats_enable_ifindex(struct nsim_dev_hwstats *hwstats,
+				int ifindex,
+				enum netdev_offload_xstats_type type,
+				struct list_head *hwsdev_list)
+{
+	struct nsim_dev_hwstats_netdev *hwsdev;
+	struct nsim_dev *nsim_dev;
+	struct net_device *netdev;
+	bool notify = false;
+	struct net *net;
+	int err = 0;
+
+	nsim_dev = container_of(hwstats, struct nsim_dev, hwstats);
+	net = nsim_dev_net(nsim_dev);
+
+	rtnl_lock();
+	mutex_lock(&hwstats->hwsdev_list_lock);
+	hwsdev = nsim_dev_hwslist_find_hwsdev(hwsdev_list, ifindex);
+	if (hwsdev)
+		goto out_unlock_list;
+
+	netdev = dev_get_by_index(net, ifindex);
+	if (!netdev) {
+		err = -ENODEV;
+		goto out_unlock_list;
+	}
+
+	hwsdev = kzalloc(sizeof(*hwsdev), GFP_KERNEL);
+	if (!hwsdev) {
+		err = -ENOMEM;
+		goto out_put_netdev;
+	}
+
+	hwsdev->netdev = netdev;
+	list_add_tail(&hwsdev->list, hwsdev_list);
+	mutex_unlock(&hwstats->hwsdev_list_lock);
+
+	if (netdev_offload_xstats_enabled(netdev, type)) {
+		nsim_dev_hwsdev_enable(hwsdev, NULL);
+		notify = true;
+	}
+
+	if (notify)
+		rtnl_offload_xstats_notify(netdev);
+	rtnl_unlock();
+	return err;
+
+out_put_netdev:
+	dev_put(netdev);
+out_unlock_list:
+	mutex_unlock(&hwstats->hwsdev_list_lock);
+	rtnl_unlock();
+	return err;
+}
+
+static int
+nsim_dev_hwstats_disable_ifindex(struct nsim_dev_hwstats *hwstats,
+				 int ifindex,
+				 enum netdev_offload_xstats_type type,
+				 struct list_head *hwsdev_list)
+{
+	struct nsim_dev_hwstats_netdev *hwsdev;
+	int err = 0;
+
+	rtnl_lock();
+	mutex_lock(&hwstats->hwsdev_list_lock);
+	hwsdev = nsim_dev_hwslist_find_hwsdev(hwsdev_list, ifindex);
+	if (hwsdev)
+		list_del(&hwsdev->list);
+	mutex_unlock(&hwstats->hwsdev_list_lock);
+
+	if (!hwsdev) {
+		err = -ENOENT;
+		goto unlock_out;
+	}
+
+	if (netdev_offload_xstats_enabled(hwsdev->netdev, type)) {
+		netdev_offload_xstats_push_delta(hwsdev->netdev, type,
+						 &hwsdev->stats);
+		rtnl_offload_xstats_notify(hwsdev->netdev);
+	}
+	nsim_dev_hwsdev_fini(hwsdev);
+
+unlock_out:
+	rtnl_unlock();
+	return err;
+}
+
+static int
+nsim_dev_hwstats_fail_ifindex(struct nsim_dev_hwstats *hwstats,
+			      int ifindex,
+			      enum netdev_offload_xstats_type type,
+			      struct list_head *hwsdev_list)
+{
+	struct nsim_dev_hwstats_netdev *hwsdev;
+	int err = 0;
+
+	mutex_lock(&hwstats->hwsdev_list_lock);
+
+	hwsdev = nsim_dev_hwslist_find_hwsdev(hwsdev_list, ifindex);
+	if (!hwsdev) {
+		err = -ENOENT;
+		goto err_hwsdev_list_unlock;
+	}
+
+	hwsdev->fail_enable = true;
+
+err_hwsdev_list_unlock:
+	mutex_unlock(&hwstats->hwsdev_list_lock);
+	return err;
+}
+
+enum nsim_dev_hwstats_do {
+	NSIM_DEV_HWSTATS_DO_DISABLE,
+	NSIM_DEV_HWSTATS_DO_ENABLE,
+	NSIM_DEV_HWSTATS_DO_FAIL,
+};
+
+struct nsim_dev_hwstats_fops {
+	const struct file_operations fops;
+	enum nsim_dev_hwstats_do action;
+	enum netdev_offload_xstats_type type;
+};
+
+static ssize_t
+nsim_dev_hwstats_do_write(struct file *file,
+			  const char __user *data,
+			  size_t count, loff_t *ppos)
+{
+	struct nsim_dev_hwstats *hwstats = file->private_data;
+	struct nsim_dev_hwstats_fops *hwsfops;
+	struct list_head *hwsdev_list;
+	int ifindex;
+	int err;
+
+	hwsfops = container_of(debugfs_real_fops(file),
+			       struct nsim_dev_hwstats_fops, fops);
+
+	err = kstrtoint_from_user(data, count, 0, &ifindex);
+	if (err)
+		return err;
+
+	hwsdev_list = nsim_dev_hwstats_get_list_head(hwstats, hwsfops->type);
+	if (WARN_ON(!hwsdev_list))
+		return -EINVAL;
+
+	switch (hwsfops->action) {
+	case NSIM_DEV_HWSTATS_DO_DISABLE:
+		err = nsim_dev_hwstats_disable_ifindex(hwstats, ifindex,
+						       hwsfops->type,
+						       hwsdev_list);
+		break;
+	case NSIM_DEV_HWSTATS_DO_ENABLE:
+		err = nsim_dev_hwstats_enable_ifindex(hwstats, ifindex,
+						      hwsfops->type,
+						      hwsdev_list);
+		break;
+	case NSIM_DEV_HWSTATS_DO_FAIL:
+		err = nsim_dev_hwstats_fail_ifindex(hwstats, ifindex,
+						    hwsfops->type,
+						    hwsdev_list);
+		break;
+	}
+	if (err)
+		return err;
+
+	return count;
+}
+
+#define NSIM_DEV_HWSTATS_FOPS(ACTION, TYPE)			\
+	{							\
+		.fops = {					\
+			.open = simple_open,			\
+			.write = nsim_dev_hwstats_do_write,	\
+			.llseek = generic_file_llseek,		\
+			.owner = THIS_MODULE,			\
+		},						\
+		.action = ACTION,				\
+		.type = TYPE,					\
+	}
+
+static const struct nsim_dev_hwstats_fops nsim_dev_hwstats_l3_disable_fops =
+	NSIM_DEV_HWSTATS_FOPS(NSIM_DEV_HWSTATS_DO_DISABLE,
+			      NETDEV_OFFLOAD_XSTATS_TYPE_L3);
+
+static const struct nsim_dev_hwstats_fops nsim_dev_hwstats_l3_enable_fops =
+	NSIM_DEV_HWSTATS_FOPS(NSIM_DEV_HWSTATS_DO_ENABLE,
+			      NETDEV_OFFLOAD_XSTATS_TYPE_L3);
+
+static const struct nsim_dev_hwstats_fops nsim_dev_hwstats_l3_fail_fops =
+	NSIM_DEV_HWSTATS_FOPS(NSIM_DEV_HWSTATS_DO_FAIL,
+			      NETDEV_OFFLOAD_XSTATS_TYPE_L3);
+
+#undef NSIM_DEV_HWSTATS_FOPS
+
+int nsim_dev_hwstats_init(struct nsim_dev *nsim_dev)
+{
+	struct nsim_dev_hwstats *hwstats = &nsim_dev->hwstats;
+	struct net *net = nsim_dev_net(nsim_dev);
+	int err;
+
+	mutex_init(&hwstats->hwsdev_list_lock);
+	INIT_LIST_HEAD(&hwstats->l3_list);
+
+	hwstats->netdevice_nb.notifier_call = nsim_dev_netdevice_event;
+	err = register_netdevice_notifier_net(net, &hwstats->netdevice_nb);
+	if (err)
+		goto err_mutex_destroy;
+
+	hwstats->ddir = debugfs_create_dir("hwstats", nsim_dev->ddir);
+	if (IS_ERR(hwstats->ddir)) {
+		err = PTR_ERR(hwstats->ddir);
+		goto err_unregister_notifier;
+	}
+
+	hwstats->l3_ddir = debugfs_create_dir("l3", hwstats->ddir);
+	if (IS_ERR(hwstats->l3_ddir)) {
+		err = PTR_ERR(hwstats->l3_ddir);
+		goto err_remove_hwstats_recursive;
+	}
+
+	debugfs_create_file("enable_ifindex", 0600, hwstats->l3_ddir, hwstats,
+			    &nsim_dev_hwstats_l3_enable_fops.fops);
+	debugfs_create_file("disable_ifindex", 0600, hwstats->l3_ddir, hwstats,
+			    &nsim_dev_hwstats_l3_disable_fops.fops);
+	debugfs_create_file("fail_next_enable", 0600, hwstats->l3_ddir, hwstats,
+			    &nsim_dev_hwstats_l3_fail_fops.fops);
+
+	INIT_DELAYED_WORK(&hwstats->traffic_dw,
+			  &nsim_dev_hwstats_traffic_work);
+	schedule_delayed_work(&hwstats->traffic_dw,
+			      msecs_to_jiffies(NSIM_DEV_HWSTATS_TRAFFIC_MS));
+	return 0;
+
+err_remove_hwstats_recursive:
+	debugfs_remove_recursive(hwstats->ddir);
+err_unregister_notifier:
+	unregister_netdevice_notifier_net(net, &hwstats->netdevice_nb);
+err_mutex_destroy:
+	mutex_destroy(&hwstats->hwsdev_list_lock);
+	return err;
+}
+
+static void nsim_dev_hwsdev_list_wipe(struct nsim_dev_hwstats *hwstats,
+				      enum netdev_offload_xstats_type type)
+{
+	struct nsim_dev_hwstats_netdev *hwsdev, *tmp;
+	struct list_head *hwsdev_list;
+
+	hwsdev_list = nsim_dev_hwstats_get_list_head(hwstats, type);
+	if (WARN_ON(!hwsdev_list))
+		return;
+
+	mutex_lock(&hwstats->hwsdev_list_lock);
+	list_for_each_entry_safe(hwsdev, tmp, hwsdev_list, list) {
+		list_del(&hwsdev->list);
+		nsim_dev_hwsdev_fini(hwsdev);
+	}
+	mutex_unlock(&hwstats->hwsdev_list_lock);
+}
+
+void nsim_dev_hwstats_exit(struct nsim_dev *nsim_dev)
+{
+	struct nsim_dev_hwstats *hwstats = &nsim_dev->hwstats;
+	struct net *net = nsim_dev_net(nsim_dev);
+
+	cancel_delayed_work_sync(&hwstats->traffic_dw);
+	debugfs_remove_recursive(hwstats->ddir);
+	unregister_netdevice_notifier_net(net, &hwstats->netdevice_nb);
+	nsim_dev_hwsdev_list_wipe(hwstats, NETDEV_OFFLOAD_XSTATS_TYPE_L3);
+	mutex_destroy(&hwstats->hwsdev_list_lock);
+}
diff --git a/drivers/net/netdevsim/netdevsim.h b/drivers/net/netdevsim/netdevsim.h
index c49771f27f17..0b122872b2c9 100644
--- a/drivers/net/netdevsim/netdevsim.h
+++ b/drivers/net/netdevsim/netdevsim.h
@@ -184,6 +184,28 @@ struct nsim_dev_health {
 int nsim_dev_health_init(struct nsim_dev *nsim_dev, struct devlink *devlink);
 void nsim_dev_health_exit(struct nsim_dev *nsim_dev);
 
+struct nsim_dev_hwstats_netdev {
+	struct list_head list;
+	struct net_device *netdev;
+	struct rtnl_hw_stats64 stats;
+	bool enabled;
+	bool fail_enable;
+};
+
+struct nsim_dev_hwstats {
+	struct dentry *ddir;
+	struct dentry *l3_ddir;
+
+	struct mutex hwsdev_list_lock; /* protects hwsdev list(s) */
+	struct list_head l3_list;
+
+	struct notifier_block netdevice_nb;
+	struct delayed_work traffic_dw;
+};
+
+int nsim_dev_hwstats_init(struct nsim_dev *nsim_dev);
+void nsim_dev_hwstats_exit(struct nsim_dev *nsim_dev);
+
 #if IS_ENABLED(CONFIG_PSAMPLE)
 int nsim_dev_psample_init(struct nsim_dev *nsim_dev);
 void nsim_dev_psample_exit(struct nsim_dev *nsim_dev);
@@ -239,7 +261,6 @@ struct nsim_dev {
 	struct dentry *take_snapshot;
 	struct dentry *nodes_ddir;
 
-	struct mutex vfs_lock;  /* Protects vfconfigs */
 	struct nsim_vf_config *vfconfigs;
 
 	struct bpf_offload_dev *bpf_dev;
@@ -252,7 +273,6 @@ struct nsim_dev {
 	struct list_head bpf_bound_maps;
 	struct netdev_phys_item_id switch_id;
 	struct list_head port_list;
-	struct mutex port_list_lock; /* protects port list */
 	bool fw_update_status;
 	u32 fw_update_overwrite_mask;
 	u32 max_macs;
@@ -261,6 +281,7 @@ struct nsim_dev {
 	bool fail_reload;
 	struct devlink_region *dummy_region;
 	struct nsim_dev_health health;
+	struct nsim_dev_hwstats hwstats;
 	struct flow_action_cookie *fa_cookie;
 	spinlock_t fa_cookie_lock; /* protects fa_cookie */
 	bool fail_trap_group_set;