netdevsim: add ability to change channel count

For testing visibility of mq/mqprio default children.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/netdevsim/ethtool.c b/drivers/net/netdevsim/ethtool.c
index b03a051..0ab6a40 100644 (file)
--- a/drivers/net/netdevsim/ethtool.c
+++ b/drivers/net/netdevsim/ethtool.c
@@ -81,6 +81,30 @@ static int nsim_set_ringparam(struct net_device *dev,
        return 0;
 }
 
+static void
+nsim_get_channels(struct net_device *dev, struct ethtool_channels *ch)
+{
+       struct netdevsim *ns = netdev_priv(dev);
+
+       ch->max_combined = ns->nsim_bus_dev->num_queues;
+       ch->combined_count = ns->ethtool.channels;
+}
+
+static int
+nsim_set_channels(struct net_device *dev, struct ethtool_channels *ch)
+{
+       struct netdevsim *ns = netdev_priv(dev);
+       int err;
+
+       err = netif_set_real_num_queues(dev, ch->combined_count,
+                                       ch->combined_count);
+       if (err)
+               return err;
+
+       ns->ethtool.channels = ch->combined_count;
+       return 0;
+}
+
 static int
 nsim_get_fecparam(struct net_device *dev, struct ethtool_fecparam *fecparam)
 {
@@ -118,6 +142,8 @@ static const struct ethtool_ops nsim_ethtool_ops = {
        .get_coalesce                   = nsim_get_coalesce,
        .get_ringparam                  = nsim_get_ringparam,
        .set_ringparam                  = nsim_set_ringparam,
+       .get_channels                   = nsim_get_channels,
+       .set_channels                   = nsim_set_channels,
        .get_fecparam                   = nsim_get_fecparam,
        .set_fecparam                   = nsim_set_fecparam,
 };
@@ -141,6 +167,8 @@ void nsim_ethtool_init(struct netdevsim *ns)
        ns->ethtool.fec.fec = ETHTOOL_FEC_NONE;
        ns->ethtool.fec.active_fec = ETHTOOL_FEC_NONE;
 
+       ns->ethtool.channels = ns->nsim_bus_dev->num_queues;
+
        ethtool = debugfs_create_dir("ethtool", ns->nsim_dev_port->ddir);
 
        debugfs_create_u32("get_err", 0600, ethtool, &ns->ethtool.get_err);

diff --git a/drivers/net/netdevsim/netdevsim.h b/drivers/net/netdevsim/netdevsim.h
index 793c86d..d42eec0 100644 (file)
--- a/drivers/net/netdevsim/netdevsim.h
+++ b/drivers/net/netdevsim/netdevsim.h
@@ -62,6 +62,7 @@ struct nsim_ethtool_pauseparam {
 struct nsim_ethtool {
        u32 get_err;
        u32 set_err;
+       u32 channels;
        struct nsim_ethtool_pauseparam pauseparam;
        struct ethtool_coalesce coalesce;
        struct ethtool_ringparam ring;