// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
/* Copyright (C) 2017-2018 Netronome Systems, Inc. */
#include <linux/etherdevice.h>
#include <linux/io-64-nonatomic-hi-lo.h>
#include <linux/lockdep.h>
#include <net/dst_metadata.h>
#include "nfpcore/nfp_cpp.h"
#include "nfpcore/nfp_nsp.h"
#include "nfp_app.h"
#include "nfp_main.h"
#include "nfp_net.h"
#include "nfp_net_ctrl.h"
#include "nfp_net_repr.h"
#include "nfp_net_sriov.h"
#include "nfp_port.h"
struct net_device *
nfp_repr_get_locked(struct nfp_app *app, struct nfp_reprs *set, unsigned int id)
{
return rcu_dereference_protected(set->reprs[id],
nfp_app_is_locked(app));
}
static void
nfp_repr_inc_tx_stats(struct net_device *netdev, unsigned int len,
int tx_status)
{
struct nfp_repr *repr = netdev_priv(netdev);
struct nfp_repr_pcpu_stats *stats;
if (unlikely(tx_status != NET_XMIT_SUCCESS &&
tx_status != NET_XMIT_CN)) {
this_cpu_inc(repr->stats->tx_drops);
return;
}
stats = this_cpu_ptr(repr->stats);
u64_stats_update_begin(&stats->syncp);
stats->tx_packets++;
stats->tx_bytes += len;
u64_stats_update_end(&stats->syncp);
}
void nfp_repr_inc_rx_stats(struct net_device *netdev, unsigned int len)
{
struct nfp_repr *repr = netdev_priv(netdev);
struct nfp_repr_pcpu_stats *stats;
stats = this_cpu_ptr(repr->stats);
u64_stats_update_begin(&stats->syncp);
stats->rx_packets++;
stats->rx_bytes += len;
u64_stats_update_end(&stats->syncp);
}
static void
nfp_repr_phy_port_get_stats64(struct nfp_port *port,
struct rtnl_link_stats64 *stats)
{
u8 __iomem *mem = port->eth_stats;
stats->tx_packets = readq(mem + NFP_MAC_STATS_TX_FRAMES_TRANSMITTED_OK);
stats->tx_bytes = readq(mem + NFP_MAC_STATS_TX_OUT_OCTETS);
stats->tx_dropped = readq(mem + NFP_MAC_STATS_TX_OUT_ERRORS);
stats->rx_packets = readq(mem + NFP_MAC_STATS_RX_FRAMES_RECEIVED_OK);
stats->rx_bytes = readq(mem + NFP_MAC_STATS_RX_IN_OCTETS);
stats->rx_dropped = readq(mem + NFP_MAC_STATS_RX_IN_ERRORS);
}
static void
nfp_repr_vnic_get_stats64(struct nfp_port *port,
struct rtnl_link_stats64 *stats)
{
/* TX and RX stats are flipped as we are returning the stats as seen
* at the switch port corresponding to the VF.
*/
stats->tx_packets = readq(port->vnic + NFP_NET_CFG_STATS_RX_FRAMES);
stats->tx_bytes = readq(port->vnic + NFP_NET_CFG_STATS_RX_OCTETS);
stats->tx_dropped = readq(port->vnic + NFP_NET_CFG_STATS_RX_DISCARDS);
stats->rx_packets = readq(port->vnic + NFP_NET_CFG_STATS_TX_FRAMES);
stats->rx_bytes = readq(port->vnic + NFP_NET_CFG_STATS_TX_OCTETS);
stats->rx_dropped = readq(port->vnic + NFP_NET_CFG_STATS_TX_DISCARDS);
}
static void
nfp_repr_get_stats64(struct net_device *netdev, struct rtnl_link_stats64 *stats)
{
struct nfp_repr *repr = netdev_priv(netdev);
if (WARN_ON(!repr->port))
return;
switch (repr->port->type) {
case NFP_PORT_PHYS_PORT:
if (!__nfp_port_get_eth_port(repr->port))
break;
nfp_repr_phy_port_get_stats64(repr->port, stats);
break;
case NFP_PORT_PF_PORT:
case NFP_PORT_VF_PORT:
nfp_repr_vnic_get_stats64(repr->port, stats);
break;
default:
break;
}
}
static bool
nfp_repr_has_offload_stats(const struct net_device *dev, int attr_id)
{
switch (attr_id) {
case IFLA_OFFLOAD_XSTATS_CPU_HIT:
return true;
}
return false;
}
static int
nfp_repr_get_host_stats64(const struct net_device *netdev,
struct rtnl_link_stats64 *stats)
{
struct nfp_repr *repr = netdev_priv(netdev);
int i;
for_each_possible_cpu(i) {
u64 tbytes, tpkts, tdrops, rbytes, rpkts;
struct nfp_repr_pcpu_stats *repr_stats;
unsigned int start;
repr_stats = per_cpu_ptr(repr->stats, i);
do {
start = u64_stats_fetch_begin(&repr_stats->syncp);
tbytes = repr_stats->tx_bytes;
tpkts = repr_stats->tx_packets;
tdrops = repr_stats->tx_drops;
rbytes = repr_stats->rx_bytes;
rpkts = repr_stats->rx_packets;
} while (u64_stats_fetch_retry(&repr_stats->syncp, start));
stats->tx_bytes += tbytes;
stats->tx_packets += tpkts;
stats->tx_dropped += tdrops;
stats->rx_bytes += rbytes;
stats->rx_packets += rpkts;
}
return 0;
}
static int
nfp_repr_get_offload_stats(int attr_id, const struct net_device *dev,
void *stats)
{
switch (attr_id) {
case IFLA_OFFLOAD_XSTATS_CPU_HIT:
return nfp_repr_get_host_stats64(dev, stats);
}
return -EINVAL;
}
static int nfp_repr_change_mtu(struct net_device *netdev, int new_mtu)
{
struct nfp_repr *repr = netdev_priv(netdev);
int err;
err = nfp_app_check_mtu(repr->app, netdev, new_mtu);
if (err)
return err;
err = nfp_app_repr_change_mtu(repr->app, netdev, new_mtu);
if (err)
return err;
WRITE_ONCE(netdev->mtu, new_mtu);
return 0;
}
static netdev_tx_t nfp_repr_xmit(struct sk_buff *skb, struct net_device *netdev)
{
struct nfp_repr *repr = netdev_priv(netdev);
unsigned int len = skb->len;
int ret;
skb_dst_drop(skb);
dst_hold((struct dst_entry *)repr->dst);
skb_dst_set(skb, (struct dst_entry *)repr->dst);
skb->dev = repr->dst->u.port_info.lower_dev;
ret = dev_queue_xmit(skb);
nfp_repr_inc_tx_stats(netdev, len, ret);
return NETDEV_TX_OK;
}
static int nfp_repr_stop(struct net_device *netdev)
{
struct nfp_repr *repr = netdev_priv(netdev);
int err;
err = nfp_app_repr_stop(repr->app, repr);
if (err)
return err;
nfp_port_configure(netdev, false);
return 0;
}
static int nfp_repr_open(struct net_device *netdev)
{
struct nfp_repr *repr = netdev_priv(netdev);
int err;
err = nfp_port_configure(netdev, true);
if (err)
return err;
err = nfp_app_repr_open(repr->app, repr);
if (err)
goto err_port_disable;
return 0;
err_port_disable:
nfp_port_configure(netdev, false);
return err;
}
static netdev_features_t
nfp_repr_fix_features(struct net_device *netdev, netdev_features_t features)
{
struct nfp_repr *repr = netdev_priv(netdev);
netdev_features_t old_features = features;
netdev_features_t lower_features;
struct net_device *lower_dev;
lower_dev = repr->dst->u.port_info.lower_dev;
lower_features = lower_dev->features;
if (lower_features & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))
lower_features |= NETIF_F_HW_CSUM;
features = netdev_intersect_features(features, lower_features);
features |= old_features & (NETIF_F_SOFT_FEATURES | NETIF_F_HW_TC);
return features;
}
const struct net_device_ops nfp_repr_netdev_ops = {
.ndo_init = nfp_app_ndo_init,
.ndo_uninit = nfp_app_ndo_uninit,
.ndo_open = nfp_repr_open,
.ndo_stop = nfp_repr_stop,
.ndo_start_xmit = nfp_repr_xmit,
.ndo_change_mtu = nfp_repr_change_mtu,
.ndo_get_stats64 = nfp_repr_get_stats64,
.ndo_has_offload_stats = nfp_repr_has_offload_stats,
.ndo_get_offload_stats = nfp_repr_get_offload_stats,
.ndo_get_phys_port_name = nfp_port_get_phys_port_name,
.ndo_setup_tc = nfp_port_setup_tc,
.ndo_set_vf_mac = nfp_app_set_vf_mac,
.ndo_set_vf_vlan = nfp_app_set_vf_vlan,
.ndo_set_vf_spoofchk = nfp_app_set_vf_spoofchk,
.ndo_set_vf_trust = nfp_app_set_vf_trust,
.ndo_get_vf_config = nfp_app_get_vf_config,
.ndo_set_vf_link_state = nfp_app_set_vf_link_state,
.ndo_fix_features = nfp_repr_fix_features,
.ndo_set_features = nfp_port_set_features,
.ndo_set_mac_address = eth_mac_addr,
.ndo_get_port_parent_id = nfp_port_get_port_parent_id,
};
void
nfp_repr_transfer_features(struct net_device *netdev, struct net_device *lower)
{
struct nfp_repr *repr = netdev_priv(netdev);
if (repr->dst->u.port_info.lower_dev != lower)
return;
netif_inherit_tso_max(netdev, lower);
netdev_update_features(netdev);
}
static void nfp_repr_clean(struct nfp_repr *repr)
{
unregister_netdev(repr->netdev);
nfp_app_repr_clean(repr->app, repr->netdev);
dst_release((struct dst_entry *)repr->dst);
nfp_port_free(repr->port);
}
static struct lock_class_key nfp_repr_netdev_xmit_lock_key;
static void nfp_repr_set_lockdep_class_one(struct net_device *dev,
struct netdev_queue *txq,
void *_unused)
{
lockdep_set_class(&txq->_xmit_lock, &nfp_repr_netdev_xmit_lock_key);
}
static void nfp_repr_set_lockdep_class(struct net_device *dev)
{
netdev_for_each_tx_queue(dev, nfp_repr_set_lockdep_class_one, NULL);
}
int nfp_repr_init(struct nfp_app *app, struct net_device *netdev,
u32 cmsg_port_id, struct nfp_port *port,
struct net_device *pf_netdev)
{
struct nfp_repr *repr = netdev_priv(netdev);
struct nfp_net *nn = netdev_priv(pf_netdev);
u32 repr_cap = nn->tlv_caps.repr_cap;
int err;
nfp_repr_set_lockdep_class(netdev);
repr->port = port;
repr->dst = metadata_dst_alloc(0, METADATA_HW_PORT_MUX, GFP_KERNEL);
if (!repr->dst)
return -ENOMEM;
repr->dst->u.port_info.port_id = cmsg_port_id;
repr->dst->u.port_info.lower_dev = pf_netdev;
netdev->netdev_ops = &nfp_repr_netdev_ops;
netdev->ethtool_ops = &nfp_port_ethtool_ops;
netdev->max_mtu = pf_netdev->max_mtu;
/* Set features the lower device can support with representors */
if (repr_cap & NFP_NET_CFG_CTRL_LIVE_ADDR)
netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
netdev->hw_features = NETIF_F_HIGHDMA;
if (repr_cap & NFP_NET_CFG_CTRL_RXCSUM_ANY)
netdev->hw_features |= NETIF_F_RXCSUM;
if (repr_cap & NFP_NET_CFG_CTRL_TXCSUM)
netdev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
if (repr_cap & NFP_NET_CFG_CTRL_GATHER)
netdev->hw_features |= NETIF_F_SG;
if ((repr_cap & NFP_NET_CFG_CTRL_LSO && nn->fw_ver.major > 2) ||
repr_cap & NFP_NET_CFG_CTRL_LSO2)
netdev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6;
if (repr_cap & NFP_NET_CFG_CTRL_RSS_ANY)
netdev->hw_features |= NETIF_F_RXHASH;
if (repr_cap & NFP_NET_CFG_CTRL_VXLAN) {
if (repr_cap & NFP_NET_CFG_CTRL_LSO)
netdev->hw_features |= NETIF_F_GSO_UDP_TUNNEL;
}
if (repr_cap & NFP_NET_CFG_CTRL_NVGRE) {
if (repr_cap & NFP_NET_CFG_CTRL_LSO)
netdev->hw_features |= NETIF_F_GSO_GRE;
}
if (repr_cap & (NFP_NET_CFG_CTRL_VXLAN | NFP_NET_CFG_CTRL_NVGRE))
netdev->hw_enc_features = netdev->hw_features;
netdev->vlan_features = netdev->hw_features;
if (repr_cap & NFP_NET_CFG_CTRL_RXVLAN_ANY)
netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_RX;
if (repr_cap & NFP_NET_CFG_CTRL_TXVLAN_ANY) {
if (repr_cap & NFP_NET_CFG_CTRL_LSO2)
netdev_warn(netdev, "Device advertises both TSO2 and TXVLAN. Refusing to enable TXVLAN.\n");
else
netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX;
}
if (repr_cap & NFP_NET_CFG_CTRL_CTAG_FILTER)
netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
if (repr_cap & NFP_NET_CFG_CTRL_RXQINQ)
netdev->hw_features |= NETIF_F_HW_VLAN_STAG_RX;
netdev->features = netdev->hw_features;
/* C-Tag strip and S-Tag strip can't be supported simultaneously,
* so enable C-Tag strip and disable S-Tag strip by default.
*/
netdev->features &= ~NETIF_F_HW_VLAN_STAG_RX;
netif_set_tso_max_segs(netdev, NFP_NET_LSO_MAX_SEGS);
netdev->priv_flags |= IFF_NO_QUEUE | IFF_DISABLE_NETPOLL;
netdev->lltx = true;
if (nfp_app_has_tc(app)) {
netdev->features |= NETIF_F_HW_TC;
netdev->hw_features |= NETIF_F_HW_TC;
}
err = nfp_app_repr_init(app, netdev);
if (err)
goto err_clean;
err = register_netdev(netdev);
if (err)
goto err_repr_clean;
return 0;
err_repr_clean:
nfp_app_repr_clean(app, netdev);
err_clean:
dst_release((struct dst_entry *)repr->dst);
return err;
}
static void __nfp_repr_free(struct nfp_repr *repr)
{
free_percpu(repr->stats);
free_netdev(repr->netdev);
}
void nfp_repr_free(struct net_device *netdev)
{
__nfp_repr_free(netdev_priv(netdev));
}
struct net_device *
nfp_repr_alloc_mqs(struct nfp_app *app, unsigned int txqs, unsigned int rxqs)
{
struct net_device *netdev;
struct nfp_repr *repr;
netdev = alloc_etherdev_mqs(sizeof(*repr), txqs, rxqs);
if (!netdev)
return NULL;
netif_carrier_off(netdev);
repr = netdev_priv(netdev);
repr->netdev = netdev;
repr->app = app;
repr->stats = netdev_alloc_pcpu_stats(struct nfp_repr_pcpu_stats);
if (!repr->stats)
goto err_free_netdev;
return netdev;
err_free_netdev:
free_netdev(netdev);
return NULL;
}
void nfp_repr_clean_and_free(struct nfp_repr *repr)
{
nfp_info(repr->app->cpp, "Destroying Representor(%s)\n",
repr->netdev->name);
nfp_repr_clean(repr);
__nfp_repr_free(repr);
}
void nfp_reprs_clean_and_free(struct nfp_app *app, struct nfp_reprs *reprs)
{
struct net_device *netdev;
unsigned int i;
for (i = 0; i < reprs->num_reprs; i++) {
netdev = nfp_repr_get_locked(app, reprs, i);
if (netdev)
nfp_repr_clean_and_free(netdev_priv(netdev));
}
kfree(reprs);
}
void
nfp_reprs_clean_and_free_by_type(struct nfp_app *app, enum nfp_repr_type type)
{
struct net_device *netdev;
struct nfp_reprs *reprs;
int i;
reprs = rcu_dereference_protected(app->reprs[type],
nfp_app_is_locked(app));
if (!reprs)
return;
/* Preclean must happen before we remove the reprs reference from the
* app below.
*/
for (i = 0; i < reprs->num_reprs; i++) {
netdev = nfp_repr_get_locked(app, reprs, i);
if (netdev)
nfp_app_repr_preclean(app, netdev);
}
reprs = nfp_app_reprs_set(app, type, NULL);
synchronize_rcu();
nfp_reprs_clean_and_free(app, reprs);
}
struct nfp_reprs *nfp_reprs_alloc(unsigned int num_reprs)
{
struct nfp_reprs *reprs;
reprs = kzalloc(struct_size(reprs, reprs, num_reprs), GFP_KERNEL);
if (!reprs)
return NULL;
reprs->num_reprs = num_reprs;
return reprs;
}
int nfp_reprs_resync_phys_ports(struct nfp_app *app)
{
struct net_device *netdev;
struct nfp_reprs *reprs;
struct nfp_repr *repr;
int i;
reprs = nfp_reprs_get_locked(app, NFP_REPR_TYPE_PHYS_PORT);
if (!reprs)
return 0;
for (i = 0; i < reprs->num_reprs; i++) {
netdev = nfp_repr_get_locked(app, reprs, i);
if (!netdev)
continue;
repr = netdev_priv(netdev);
if (repr->port->type != NFP_PORT_INVALID)
continue;
nfp_app_repr_preclean(app, netdev);
rtnl_lock();
rcu_assign_pointer(reprs->reprs[i], NULL);
rtnl_unlock();
synchronize_rcu();
nfp_repr_clean(repr);
}
return 0;
}
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