1 files changed, 30 insertions, 3 deletions

diff --git a/drivers/net/netdevsim/ethtool.c b/drivers/net/netdevsim/ethtool.c
index 5fe1eaef99b5..f631d90c428a 100644
--- a/drivers/net/netdevsim/ethtool.c
+++ b/drivers/net/netdevsim/ethtool.c
@@ -2,8 +2,8 @@
 // Copyright (c) 2020 Facebook
 
 #include <linux/debugfs.h>
-#include <linux/ethtool.h>
 #include <linux/random.h>
+#include <net/netdev_queues.h>
 
 #include "netdevsim.h"
 
@@ -72,6 +72,10 @@ static void nsim_get_ringparam(struct net_device *dev,
 	struct netdevsim *ns = netdev_priv(dev);
 
 	memcpy(ring, &ns->ethtool.ring, sizeof(ns->ethtool.ring));
+	kernel_ring->hds_thresh_max = NSIM_HDS_THRESHOLD_MAX;
+
+	if (dev->cfg->hds_config == ETHTOOL_TCP_DATA_SPLIT_UNKNOWN)
+		kernel_ring->tcp_data_split = ETHTOOL_TCP_DATA_SPLIT_ENABLED;
 }
 
 static int nsim_set_ringparam(struct net_device *dev,
@@ -97,20 +101,39 @@ nsim_get_channels(struct net_device *dev, struct ethtool_channels *ch)
 	ch->combined_count = ns->ethtool.channels;
 }
 
+static void
+nsim_wake_queues(struct net_device *dev)
+{
+	struct netdevsim *ns = netdev_priv(dev);
+	struct netdevsim *peer;
+
+	synchronize_net();
+	netif_tx_wake_all_queues(dev);
+
+	rcu_read_lock();
+	peer = rcu_dereference(ns->peer);
+	if (peer)
+		netif_tx_wake_all_queues(peer->netdev);
+	rcu_read_unlock();
+}
+
 static int
 nsim_set_channels(struct net_device *dev, struct ethtool_channels *ch)
 {
 	struct netdevsim *ns = netdev_priv(dev);
 	int err;
 
-	mutex_lock(&dev->lock);
 	err = netif_set_real_num_queues(dev, ch->combined_count,
 					ch->combined_count);
-	mutex_unlock(&dev->lock);
 	if (err)
 		return err;
 
 	ns->ethtool.channels = ch->combined_count;
+
+	/* Only wake up queues if devices are linked */
+	if (rcu_access_pointer(ns->peer))
+		nsim_wake_queues(dev);
+
 	return 0;
 }
 
@@ -161,6 +184,8 @@ static int nsim_get_ts_info(struct net_device *dev,
 
 static const struct ethtool_ops nsim_ethtool_ops = {
 	.supported_coalesce_params	= ETHTOOL_COALESCE_ALL_PARAMS,
+	.supported_ring_params		= ETHTOOL_RING_USE_TCP_DATA_SPLIT |
+					  ETHTOOL_RING_USE_HDS_THRS,
 	.get_pause_stats	        = nsim_get_pause_stats,
 	.get_pauseparam		        = nsim_get_pauseparam,
 	.set_pauseparam		        = nsim_set_pauseparam,
@@ -178,9 +203,11 @@ static const struct ethtool_ops nsim_ethtool_ops = {
 
 static void nsim_ethtool_ring_init(struct netdevsim *ns)
 {
+	ns->ethtool.ring.rx_pending = 512;
 	ns->ethtool.ring.rx_max_pending = 4096;
 	ns->ethtool.ring.rx_jumbo_max_pending = 4096;
 	ns->ethtool.ring.rx_mini_max_pending = 4096;
+	ns->ethtool.ring.tx_pending = 512;
 	ns->ethtool.ring.tx_max_pending = 4096;
 }