Commit 35da47fe authored by Vladimir Oltean's avatar Vladimir Oltean Committed by Jakub Kicinski
Browse files

net: netdevsim: mimic tc-taprio offload 



To be able to use netdevsim for tc-testing with an offloaded tc-taprio
schedule, it needs to report a PTP clock (which it now does), and to
accept ndo_setup_tc(TC_SETUP_QDISC_TAPRIO) calls.

Since netdevsim has no packet I/O, this doesn't do anything intelligent,
it only allows taprio offload code paths to go through some level of
automated testing.

Signed-off-by: default avatarVladimir Oltean <vladimir.oltean@nxp.com>
Link: https://lore.kernel.org/r/20230807193324.4128292-9-vladimir.oltean@nxp.com


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent b63e78fc

drivers/net/netdevsim/netdev.c

+27 −0
Original line number Diff line number Diff line
@@ -209,6 +209,31 @@ static int nsim_set_vf_link_state(struct net_device *dev, int vf, int state) 
	return 0;

}



static void nsim_taprio_stats(struct tc_taprio_qopt_stats *stats)

{

	stats->window_drops = 0;

	stats->tx_overruns = 0;

}



static int nsim_setup_tc_taprio(struct net_device *dev,

				struct tc_taprio_qopt_offload *offload)

{

	int err = 0;



	switch (offload->cmd) {

	case TAPRIO_CMD_REPLACE:

	case TAPRIO_CMD_DESTROY:

		break;

	case TAPRIO_CMD_STATS:

		nsim_taprio_stats(&offload->stats);

		break;

	default:

		err = -EOPNOTSUPP;

	}



	return err;

}



static LIST_HEAD(nsim_block_cb_list);



static int
@@ -217,6 +242,8 @@ nsim_setup_tc(struct net_device *dev, enum tc_setup_type type, void *type_data) 
	struct netdevsim *ns = netdev_priv(dev);



	switch (type) {

	case TC_SETUP_QDISC_TAPRIO:

		return nsim_setup_tc_taprio(dev, type_data);

	case TC_SETUP_BLOCK:

		return flow_block_cb_setup_simple(type_data,

						  &nsim_block_cb_list,