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// SPDX-License-Identifier: GPL-2.0-only
/****************************************************************************
* Driver for Solarflare network controllers and boards
* Copyright 2019 Solarflare Communications Inc.
* Copyright 2020-2022 Xilinx Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation, incorporated herein by reference.
*/
#include "ef100_rep.h"
#include "ef100_netdev.h"
#include "ef100_nic.h"
#include "mae.h"
#define EFX_EF100_REP_DRIVER "efx_ef100_rep"
static int efx_ef100_rep_init_struct(struct efx_nic *efx, struct efx_rep *efv,
unsigned int i)
{
efv->parent = efx;
efv->idx = i;
INIT_LIST_HEAD(&efv->list);
efv->msg_enable = NETIF_MSG_DRV | NETIF_MSG_PROBE |
NETIF_MSG_LINK | NETIF_MSG_IFDOWN |
NETIF_MSG_IFUP | NETIF_MSG_RX_ERR |
NETIF_MSG_TX_ERR | NETIF_MSG_HW;
return 0;
}
static netdev_tx_t efx_ef100_rep_xmit(struct sk_buff *skb,
struct net_device *dev)
{
struct efx_rep *efv = netdev_priv(dev);
struct efx_nic *efx = efv->parent;
netdev_tx_t rc;
/* __ef100_hard_start_xmit() will always return success even in the
* case of TX drops, where it will increment efx's tx_dropped. The
* efv stats really only count attempted TX, not success/failure.
*/
atomic64_inc(&efv->stats.tx_packets);
atomic64_add(skb->len, &efv->stats.tx_bytes);
netif_tx_lock(efx->net_dev);
rc = __ef100_hard_start_xmit(skb, efx, dev, efv);
netif_tx_unlock(efx->net_dev);
return rc;
}
static int efx_ef100_rep_get_port_parent_id(struct net_device *dev,
struct netdev_phys_item_id *ppid)
{
struct efx_rep *efv = netdev_priv(dev);
struct efx_nic *efx = efv->parent;
struct ef100_nic_data *nic_data;
nic_data = efx->nic_data;
/* nic_data->port_id is a u8[] */
ppid->id_len = sizeof(nic_data->port_id);
memcpy(ppid->id, nic_data->port_id, sizeof(nic_data->port_id));
return 0;
}
static int efx_ef100_rep_get_phys_port_name(struct net_device *dev,
char *buf, size_t len)
{
struct efx_rep *efv = netdev_priv(dev);
struct efx_nic *efx = efv->parent;
struct ef100_nic_data *nic_data;
int ret;
nic_data = efx->nic_data;
ret = snprintf(buf, len, "p%upf%uvf%u", efx->port_num,
nic_data->pf_index, efv->idx);
if (ret >= len)
return -EOPNOTSUPP;
return 0;
}
static void efx_ef100_rep_get_stats64(struct net_device *dev,
struct rtnl_link_stats64 *stats)
{
struct efx_rep *efv = netdev_priv(dev);
stats->rx_packets = atomic64_read(&efv->stats.rx_packets);
stats->tx_packets = atomic64_read(&efv->stats.tx_packets);
stats->rx_bytes = atomic64_read(&efv->stats.rx_bytes);
stats->tx_bytes = atomic64_read(&efv->stats.tx_bytes);
stats->rx_dropped = atomic64_read(&efv->stats.rx_dropped);
stats->tx_errors = atomic64_read(&efv->stats.tx_errors);
}
static const struct net_device_ops efx_ef100_rep_netdev_ops = {
.ndo_start_xmit = efx_ef100_rep_xmit,
.ndo_get_port_parent_id = efx_ef100_rep_get_port_parent_id,
.ndo_get_phys_port_name = efx_ef100_rep_get_phys_port_name,
.ndo_get_stats64 = efx_ef100_rep_get_stats64,
};
static void efx_ef100_rep_get_drvinfo(struct net_device *dev,
struct ethtool_drvinfo *drvinfo)
{
strscpy(drvinfo->driver, EFX_EF100_REP_DRIVER, sizeof(drvinfo->driver));
}
static u32 efx_ef100_rep_ethtool_get_msglevel(struct net_device *net_dev)
{
struct efx_rep *efv = netdev_priv(net_dev);
return efv->msg_enable;
}
static void efx_ef100_rep_ethtool_set_msglevel(struct net_device *net_dev,
u32 msg_enable)
{
struct efx_rep *efv = netdev_priv(net_dev);
efv->msg_enable = msg_enable;
}
static const struct ethtool_ops efx_ef100_rep_ethtool_ops = {
.get_drvinfo = efx_ef100_rep_get_drvinfo,
.get_msglevel = efx_ef100_rep_ethtool_get_msglevel,
.set_msglevel = efx_ef100_rep_ethtool_set_msglevel,
};
static struct efx_rep *efx_ef100_rep_create_netdev(struct efx_nic *efx,
unsigned int i)
{
struct net_device *net_dev;
struct efx_rep *efv;
int rc;
net_dev = alloc_etherdev_mq(sizeof(*efv), 1);
if (!net_dev)
return ERR_PTR(-ENOMEM);
efv = netdev_priv(net_dev);
rc = efx_ef100_rep_init_struct(efx, efv, i);
if (rc)
goto fail1;
efv->net_dev = net_dev;
rtnl_lock();
spin_lock_bh(&efx->vf_reps_lock);
list_add_tail(&efv->list, &efx->vf_reps);
spin_unlock_bh(&efx->vf_reps_lock);
if (netif_running(efx->net_dev) && efx->state == STATE_NET_UP) {
netif_device_attach(net_dev);
netif_carrier_on(net_dev);
} else {
netif_carrier_off(net_dev);
netif_tx_stop_all_queues(net_dev);
}
rtnl_unlock();
net_dev->netdev_ops = &efx_ef100_rep_netdev_ops;
net_dev->ethtool_ops = &efx_ef100_rep_ethtool_ops;
net_dev->min_mtu = EFX_MIN_MTU;
net_dev->max_mtu = EFX_MAX_MTU;
net_dev->features |= NETIF_F_LLTX;
net_dev->hw_features |= NETIF_F_LLTX;
return efv;
fail1:
free_netdev(net_dev);
return ERR_PTR(rc);
}
static int efx_ef100_configure_rep(struct efx_rep *efv)
{
struct efx_nic *efx = efv->parent;
u32 selector;
int rc;
/* Construct mport selector for corresponding VF */
efx_mae_mport_vf(efx, efv->idx, &selector);
/* Look up actual mport ID */
rc = efx_mae_lookup_mport(efx, selector, &efv->mport);
if (rc)
return rc;
pci_dbg(efx->pci_dev, "VF %u has mport ID %#x\n", efv->idx, efv->mport);
/* mport label should fit in 16 bits */
WARN_ON(efv->mport >> 16);
return 0;
}
static void efx_ef100_rep_destroy_netdev(struct efx_rep *efv)
{
struct efx_nic *efx = efv->parent;
rtnl_lock();
spin_lock_bh(&efx->vf_reps_lock);
list_del(&efv->list);
spin_unlock_bh(&efx->vf_reps_lock);
rtnl_unlock();
free_netdev(efv->net_dev);
}
int efx_ef100_vfrep_create(struct efx_nic *efx, unsigned int i)
{
struct efx_rep *efv;
int rc;
efv = efx_ef100_rep_create_netdev(efx, i);
if (IS_ERR(efv)) {
rc = PTR_ERR(efv);
pci_err(efx->pci_dev,
"Failed to create representor for VF %d, rc %d\n", i,
rc);
return rc;
}
rc = efx_ef100_configure_rep(efv);
if (rc) {
pci_err(efx->pci_dev,
"Failed to configure representor for VF %d, rc %d\n",
i, rc);
goto fail;
}
rc = register_netdev(efv->net_dev);
if (rc) {
pci_err(efx->pci_dev,
"Failed to register representor for VF %d, rc %d\n",
i, rc);
goto fail;
}
pci_dbg(efx->pci_dev, "Representor for VF %d is %s\n", i,
efv->net_dev->name);
return 0;
fail:
efx_ef100_rep_destroy_netdev(efv);
return rc;
}
void efx_ef100_vfrep_destroy(struct efx_nic *efx, struct efx_rep *efv)
{
struct net_device *rep_dev;
rep_dev = efv->net_dev;
if (!rep_dev)
return;
netif_dbg(efx, drv, rep_dev, "Removing VF representor\n");
unregister_netdev(rep_dev);
efx_ef100_rep_destroy_netdev(efv);
}
void efx_ef100_fini_vfreps(struct efx_nic *efx)
{
struct ef100_nic_data *nic_data = efx->nic_data;
struct efx_rep *efv, *next;
if (!nic_data->grp_mae)
return;
list_for_each_entry_safe(efv, next, &efx->vf_reps, list)
efx_ef100_vfrep_destroy(efx, efv);
}
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