1 files changed, 254 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_repr.c b/drivers/net/ethernet/intel/ice/ice_repr.c
new file mode 100644
index 0000000000000..479da3d020a77
--- /dev/null
+++ b/drivers/net/ethernet/intel/ice/ice_repr.c
@@ -0,0 +1,254 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (C) 2019-2021, Intel Corporation. */
+
+#include "ice.h"
+#include "ice_eswitch.h"
+#include "ice_devlink.h"
+#include "ice_virtchnl_pf.h"
+
+/**
+ * ice_repr_get_sw_port_id - get port ID associated with representor
+ * @repr: pointer to port representor
+ */
+static int ice_repr_get_sw_port_id(struct ice_repr *repr)
+{
+	return repr->vf->pf->hw.port_info->lport;
+}
+
+/**
+ * ice_repr_get_phys_port_name - get phys port name
+ * @netdev: pointer to port representor netdev
+ * @buf: write here port name
+ * @len: max length of buf
+ */
+static int
+ice_repr_get_phys_port_name(struct net_device *netdev, char *buf, size_t len)
+{
+	struct ice_netdev_priv *np = netdev_priv(netdev);
+	struct ice_repr *repr = np->repr;
+	int res;
+
+	/* Devlink port is registered and devlink core is taking care of name formatting. */
+	if (repr->vf->devlink_port.devlink)
+		return -EOPNOTSUPP;
+
+	res = snprintf(buf, len, "pf%dvfr%d", ice_repr_get_sw_port_id(repr),
+		       repr->vf->vf_id);
+	if (res <= 0)
+		return -EOPNOTSUPP;
+	return 0;
+}
+
+/**
+ * ice_netdev_to_repr - Get port representor for given netdevice
+ * @netdev: pointer to port representor netdev
+ */
+struct ice_repr *ice_netdev_to_repr(struct net_device *netdev)
+{
+	struct ice_netdev_priv *np = netdev_priv(netdev);
+
+	return np->repr;
+}
+
+/**
+ * ice_repr_open - Enable port representor's network interface
+ * @netdev: network interface device structure
+ *
+ * The open entry point is called when a port representor's network
+ * interface is made active by the system (IFF_UP). Corresponding
+ * VF is notified about link status change.
+ *
+ * Returns 0 on success
+ */
+static int ice_repr_open(struct net_device *netdev)
+{
+	struct ice_repr *repr = ice_netdev_to_repr(netdev);
+	struct ice_vf *vf;
+
+	vf = repr->vf;
+	vf->link_forced = true;
+	vf->link_up = true;
+	ice_vc_notify_vf_link_state(vf);
+
+	netif_carrier_on(netdev);
+	netif_tx_start_all_queues(netdev);
+
+	return 0;
+}
+
+/**
+ * ice_repr_stop - Disable port representor's network interface
+ * @netdev: network interface device structure
+ *
+ * The stop entry point is called when a port representor's network
+ * interface is de-activated by the system. Corresponding
+ * VF is notified about link status change.
+ *
+ * Returns 0 on success
+ */
+static int ice_repr_stop(struct net_device *netdev)
+{
+	struct ice_repr *repr = ice_netdev_to_repr(netdev);
+	struct ice_vf *vf;
+
+	vf = repr->vf;
+	vf->link_forced = true;
+	vf->link_up = false;
+	ice_vc_notify_vf_link_state(vf);
+
+	netif_carrier_off(netdev);
+	netif_tx_stop_all_queues(netdev);
+
+	return 0;
+}
+
+static struct devlink_port *
+ice_repr_get_devlink_port(struct net_device *netdev)
+{
+	struct ice_repr *repr = ice_netdev_to_repr(netdev);
+
+	return &repr->vf->devlink_port;
+}
+
+static const struct net_device_ops ice_repr_netdev_ops = {
+	.ndo_get_phys_port_name = ice_repr_get_phys_port_name,
+	.ndo_open = ice_repr_open,
+	.ndo_stop = ice_repr_stop,
+	.ndo_get_devlink_port = ice_repr_get_devlink_port,
+};
+
+/**
+ * ice_is_port_repr_netdev - Check if a given netdevice is a port representor netdev
+ * @netdev: pointer to netdev
+ */
+bool ice_is_port_repr_netdev(struct net_device *netdev)
+{
+	return netdev && (netdev->netdev_ops == &ice_repr_netdev_ops);
+}
+
+/**
+ * ice_repr_reg_netdev - register port representor netdev
+ * @netdev: pointer to port representor netdev
+ */
+static int
+ice_repr_reg_netdev(struct net_device *netdev)
+{
+	eth_hw_addr_random(netdev);
+	netdev->netdev_ops = &ice_repr_netdev_ops;
+
+	netif_carrier_off(netdev);
+	netif_tx_stop_all_queues(netdev);
+
+	return register_netdev(netdev);
+}
+
+/**
+ * ice_repr_add - add representor for VF
+ * @vf: pointer to VF structure
+ */
+static int ice_repr_add(struct ice_vf *vf)
+{
+	struct ice_q_vector *q_vector;
+	struct ice_netdev_priv *np;
+	struct ice_repr *repr;
+	int err;
+
+	repr = kzalloc(sizeof(*repr), GFP_KERNEL);
+	if (!repr)
+		return -ENOMEM;
+
+	repr->netdev = alloc_etherdev(sizeof(struct ice_netdev_priv));
+	if (!repr->netdev) {
+		err =  -ENOMEM;
+		goto err_alloc;
+	}
+
+	repr->src_vsi = ice_get_vf_vsi(vf);
+	repr->vf = vf;
+	vf->repr = repr;
+	np = netdev_priv(repr->netdev);
+	np->repr = repr;
+
+	q_vector = kzalloc(sizeof(*q_vector), GFP_KERNEL);
+	if (!q_vector) {
+		err = -ENOMEM;
+		goto err_alloc_q_vector;
+	}
+	repr->q_vector = q_vector;
+
+	err = ice_devlink_create_vf_port(vf);
+	if (err)
+		goto err_devlink;
+
+	err = ice_repr_reg_netdev(repr->netdev);
+	if (err)
+		goto err_netdev;
+
+	devlink_port_type_eth_set(&vf->devlink_port, repr->netdev);
+
+	return 0;
+
+err_netdev:
+	ice_devlink_destroy_vf_port(vf);
+err_devlink:
+	kfree(repr->q_vector);
+	vf->repr->q_vector = NULL;
+err_alloc_q_vector:
+	free_netdev(repr->netdev);
+	repr->netdev = NULL;
+err_alloc:
+	kfree(repr);
+	vf->repr = NULL;
+	return err;
+}
+
+/**
+ * ice_repr_rem - remove representor from VF
+ * @vf: pointer to VF structure
+ */
+static void ice_repr_rem(struct ice_vf *vf)
+{
+	ice_devlink_destroy_vf_port(vf);
+	kfree(vf->repr->q_vector);
+	vf->repr->q_vector = NULL;
+	unregister_netdev(vf->repr->netdev);
+	free_netdev(vf->repr->netdev);
+	vf->repr->netdev = NULL;
+	kfree(vf->repr);
+	vf->repr = NULL;
+}
+
+/**
+ * ice_repr_add_for_all_vfs - add port representor for all VFs
+ * @pf: pointer to PF structure
+ */
+int ice_repr_add_for_all_vfs(struct ice_pf *pf)
+{
+	int err;
+	int i;
+
+	ice_for_each_vf(pf, i) {
+		err = ice_repr_add(&pf->vf[i]);
+		if (err)
+			goto err;
+	}
+	return 0;
+
+err:
+	for (i = i - 1; i >= 0; i--)
+		ice_repr_rem(&pf->vf[i]);
+
+	return err;
+}
+
+/**
+ * ice_repr_rem_from_all_vfs - remove port representor for all VFs
+ * @pf: pointer to PF structure
+ */
+void ice_repr_rem_from_all_vfs(struct ice_pf *pf)
+{
+	int i;
+
+	ice_for_each_vf(pf, i)
+		ice_repr_rem(&pf->vf[i]);
+}