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// 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]);
}
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