1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 /* Copyright (C) 2017-2018 Netronome Systems, Inc. */
4 #include <linux/etherdevice.h>
5 #include <linux/io-64-nonatomic-hi-lo.h>
6 #include <linux/lockdep.h>
7 #include <net/dst_metadata.h>
9 #include "nfpcore/nfp_cpp.h"
10 #include "nfpcore/nfp_nsp.h"
14 #include "nfp_net_ctrl.h"
15 #include "nfp_net_repr.h"
16 #include "nfp_net_sriov.h"
20 nfp_repr_get_locked(struct nfp_app *app, struct nfp_reprs *set, unsigned int id)
22 return rcu_dereference_protected(set->reprs[id],
23 lockdep_is_held(&app->pf->lock));
27 nfp_repr_inc_tx_stats(struct net_device *netdev, unsigned int len,
30 struct nfp_repr *repr = netdev_priv(netdev);
31 struct nfp_repr_pcpu_stats *stats;
33 if (unlikely(tx_status != NET_XMIT_SUCCESS &&
34 tx_status != NET_XMIT_CN)) {
35 this_cpu_inc(repr->stats->tx_drops);
39 stats = this_cpu_ptr(repr->stats);
40 u64_stats_update_begin(&stats->syncp);
42 stats->tx_bytes += len;
43 u64_stats_update_end(&stats->syncp);
46 void nfp_repr_inc_rx_stats(struct net_device *netdev, unsigned int len)
48 struct nfp_repr *repr = netdev_priv(netdev);
49 struct nfp_repr_pcpu_stats *stats;
51 stats = this_cpu_ptr(repr->stats);
52 u64_stats_update_begin(&stats->syncp);
54 stats->rx_bytes += len;
55 u64_stats_update_end(&stats->syncp);
59 nfp_repr_phy_port_get_stats64(struct nfp_port *port,
60 struct rtnl_link_stats64 *stats)
62 u8 __iomem *mem = port->eth_stats;
64 stats->tx_packets = readq(mem + NFP_MAC_STATS_TX_FRAMES_TRANSMITTED_OK);
65 stats->tx_bytes = readq(mem + NFP_MAC_STATS_TX_OUT_OCTETS);
66 stats->tx_dropped = readq(mem + NFP_MAC_STATS_TX_OUT_ERRORS);
68 stats->rx_packets = readq(mem + NFP_MAC_STATS_RX_FRAMES_RECEIVED_OK);
69 stats->rx_bytes = readq(mem + NFP_MAC_STATS_RX_IN_OCTETS);
70 stats->rx_dropped = readq(mem + NFP_MAC_STATS_RX_IN_ERRORS);
74 nfp_repr_vnic_get_stats64(struct nfp_port *port,
75 struct rtnl_link_stats64 *stats)
77 /* TX and RX stats are flipped as we are returning the stats as seen
78 * at the switch port corresponding to the VF.
80 stats->tx_packets = readq(port->vnic + NFP_NET_CFG_STATS_RX_FRAMES);
81 stats->tx_bytes = readq(port->vnic + NFP_NET_CFG_STATS_RX_OCTETS);
82 stats->tx_dropped = readq(port->vnic + NFP_NET_CFG_STATS_RX_DISCARDS);
84 stats->rx_packets = readq(port->vnic + NFP_NET_CFG_STATS_TX_FRAMES);
85 stats->rx_bytes = readq(port->vnic + NFP_NET_CFG_STATS_TX_OCTETS);
86 stats->rx_dropped = readq(port->vnic + NFP_NET_CFG_STATS_TX_DISCARDS);
90 nfp_repr_get_stats64(struct net_device *netdev, struct rtnl_link_stats64 *stats)
92 struct nfp_repr *repr = netdev_priv(netdev);
94 if (WARN_ON(!repr->port))
97 switch (repr->port->type) {
98 case NFP_PORT_PHYS_PORT:
99 if (!__nfp_port_get_eth_port(repr->port))
101 nfp_repr_phy_port_get_stats64(repr->port, stats);
103 case NFP_PORT_PF_PORT:
104 case NFP_PORT_VF_PORT:
105 nfp_repr_vnic_get_stats64(repr->port, stats);
112 nfp_repr_has_offload_stats(const struct net_device *dev, int attr_id)
115 case IFLA_OFFLOAD_XSTATS_CPU_HIT:
123 nfp_repr_get_host_stats64(const struct net_device *netdev,
124 struct rtnl_link_stats64 *stats)
126 struct nfp_repr *repr = netdev_priv(netdev);
129 for_each_possible_cpu(i) {
130 u64 tbytes, tpkts, tdrops, rbytes, rpkts;
131 struct nfp_repr_pcpu_stats *repr_stats;
134 repr_stats = per_cpu_ptr(repr->stats, i);
136 start = u64_stats_fetch_begin_irq(&repr_stats->syncp);
137 tbytes = repr_stats->tx_bytes;
138 tpkts = repr_stats->tx_packets;
139 tdrops = repr_stats->tx_drops;
140 rbytes = repr_stats->rx_bytes;
141 rpkts = repr_stats->rx_packets;
142 } while (u64_stats_fetch_retry_irq(&repr_stats->syncp, start));
144 stats->tx_bytes += tbytes;
145 stats->tx_packets += tpkts;
146 stats->tx_dropped += tdrops;
147 stats->rx_bytes += rbytes;
148 stats->rx_packets += rpkts;
155 nfp_repr_get_offload_stats(int attr_id, const struct net_device *dev,
159 case IFLA_OFFLOAD_XSTATS_CPU_HIT:
160 return nfp_repr_get_host_stats64(dev, stats);
166 static int nfp_repr_change_mtu(struct net_device *netdev, int new_mtu)
168 struct nfp_repr *repr = netdev_priv(netdev);
171 err = nfp_app_check_mtu(repr->app, netdev, new_mtu);
175 err = nfp_app_repr_change_mtu(repr->app, netdev, new_mtu);
179 netdev->mtu = new_mtu;
184 static netdev_tx_t nfp_repr_xmit(struct sk_buff *skb, struct net_device *netdev)
186 struct nfp_repr *repr = netdev_priv(netdev);
187 unsigned int len = skb->len;
191 dst_hold((struct dst_entry *)repr->dst);
192 skb_dst_set(skb, (struct dst_entry *)repr->dst);
193 skb->dev = repr->dst->u.port_info.lower_dev;
195 ret = dev_queue_xmit(skb);
196 nfp_repr_inc_tx_stats(netdev, len, ret);
201 static int nfp_repr_stop(struct net_device *netdev)
203 struct nfp_repr *repr = netdev_priv(netdev);
206 err = nfp_app_repr_stop(repr->app, repr);
210 nfp_port_configure(netdev, false);
214 static int nfp_repr_open(struct net_device *netdev)
216 struct nfp_repr *repr = netdev_priv(netdev);
219 err = nfp_port_configure(netdev, true);
223 err = nfp_app_repr_open(repr->app, repr);
225 goto err_port_disable;
230 nfp_port_configure(netdev, false);
234 static netdev_features_t
235 nfp_repr_fix_features(struct net_device *netdev, netdev_features_t features)
237 struct nfp_repr *repr = netdev_priv(netdev);
238 netdev_features_t old_features = features;
239 netdev_features_t lower_features;
240 struct net_device *lower_dev;
242 lower_dev = repr->dst->u.port_info.lower_dev;
244 lower_features = lower_dev->features;
245 if (lower_features & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))
246 lower_features |= NETIF_F_HW_CSUM;
248 features = netdev_intersect_features(features, lower_features);
249 features |= old_features & (NETIF_F_SOFT_FEATURES | NETIF_F_HW_TC);
250 features |= NETIF_F_LLTX;
255 const struct net_device_ops nfp_repr_netdev_ops = {
256 .ndo_init = nfp_app_ndo_init,
257 .ndo_uninit = nfp_app_ndo_uninit,
258 .ndo_open = nfp_repr_open,
259 .ndo_stop = nfp_repr_stop,
260 .ndo_start_xmit = nfp_repr_xmit,
261 .ndo_change_mtu = nfp_repr_change_mtu,
262 .ndo_get_stats64 = nfp_repr_get_stats64,
263 .ndo_has_offload_stats = nfp_repr_has_offload_stats,
264 .ndo_get_offload_stats = nfp_repr_get_offload_stats,
265 .ndo_get_phys_port_name = nfp_port_get_phys_port_name,
266 .ndo_setup_tc = nfp_port_setup_tc,
267 .ndo_set_vf_mac = nfp_app_set_vf_mac,
268 .ndo_set_vf_vlan = nfp_app_set_vf_vlan,
269 .ndo_set_vf_spoofchk = nfp_app_set_vf_spoofchk,
270 .ndo_set_vf_trust = nfp_app_set_vf_trust,
271 .ndo_get_vf_config = nfp_app_get_vf_config,
272 .ndo_set_vf_link_state = nfp_app_set_vf_link_state,
273 .ndo_fix_features = nfp_repr_fix_features,
274 .ndo_set_features = nfp_port_set_features,
275 .ndo_set_mac_address = eth_mac_addr,
276 .ndo_get_port_parent_id = nfp_port_get_port_parent_id,
277 .ndo_get_devlink_port = nfp_devlink_get_devlink_port,
281 nfp_repr_transfer_features(struct net_device *netdev, struct net_device *lower)
283 struct nfp_repr *repr = netdev_priv(netdev);
285 if (repr->dst->u.port_info.lower_dev != lower)
288 netdev->gso_max_size = lower->gso_max_size;
289 netdev->gso_max_segs = lower->gso_max_segs;
291 netdev_update_features(netdev);
294 static void nfp_repr_clean(struct nfp_repr *repr)
296 unregister_netdev(repr->netdev);
297 nfp_app_repr_clean(repr->app, repr->netdev);
298 dst_release((struct dst_entry *)repr->dst);
299 nfp_port_free(repr->port);
302 static struct lock_class_key nfp_repr_netdev_xmit_lock_key;
303 static struct lock_class_key nfp_repr_netdev_addr_lock_key;
305 static void nfp_repr_set_lockdep_class_one(struct net_device *dev,
306 struct netdev_queue *txq,
309 lockdep_set_class(&txq->_xmit_lock, &nfp_repr_netdev_xmit_lock_key);
312 static void nfp_repr_set_lockdep_class(struct net_device *dev)
314 lockdep_set_class(&dev->addr_list_lock, &nfp_repr_netdev_addr_lock_key);
315 netdev_for_each_tx_queue(dev, nfp_repr_set_lockdep_class_one, NULL);
318 int nfp_repr_init(struct nfp_app *app, struct net_device *netdev,
319 u32 cmsg_port_id, struct nfp_port *port,
320 struct net_device *pf_netdev)
322 struct nfp_repr *repr = netdev_priv(netdev);
323 struct nfp_net *nn = netdev_priv(pf_netdev);
324 u32 repr_cap = nn->tlv_caps.repr_cap;
327 nfp_repr_set_lockdep_class(netdev);
330 repr->dst = metadata_dst_alloc(0, METADATA_HW_PORT_MUX, GFP_KERNEL);
333 repr->dst->u.port_info.port_id = cmsg_port_id;
334 repr->dst->u.port_info.lower_dev = pf_netdev;
336 netdev->netdev_ops = &nfp_repr_netdev_ops;
337 netdev->ethtool_ops = &nfp_port_ethtool_ops;
339 netdev->max_mtu = pf_netdev->max_mtu;
341 /* Set features the lower device can support with representors */
342 if (repr_cap & NFP_NET_CFG_CTRL_LIVE_ADDR)
343 netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
345 netdev->hw_features = NETIF_F_HIGHDMA;
346 if (repr_cap & NFP_NET_CFG_CTRL_RXCSUM_ANY)
347 netdev->hw_features |= NETIF_F_RXCSUM;
348 if (repr_cap & NFP_NET_CFG_CTRL_TXCSUM)
349 netdev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
350 if (repr_cap & NFP_NET_CFG_CTRL_GATHER)
351 netdev->hw_features |= NETIF_F_SG;
352 if ((repr_cap & NFP_NET_CFG_CTRL_LSO && nn->fw_ver.major > 2) ||
353 repr_cap & NFP_NET_CFG_CTRL_LSO2)
354 netdev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6;
355 if (repr_cap & NFP_NET_CFG_CTRL_RSS_ANY)
356 netdev->hw_features |= NETIF_F_RXHASH;
357 if (repr_cap & NFP_NET_CFG_CTRL_VXLAN) {
358 if (repr_cap & NFP_NET_CFG_CTRL_LSO)
359 netdev->hw_features |= NETIF_F_GSO_UDP_TUNNEL;
361 if (repr_cap & NFP_NET_CFG_CTRL_NVGRE) {
362 if (repr_cap & NFP_NET_CFG_CTRL_LSO)
363 netdev->hw_features |= NETIF_F_GSO_GRE;
365 if (repr_cap & (NFP_NET_CFG_CTRL_VXLAN | NFP_NET_CFG_CTRL_NVGRE))
366 netdev->hw_enc_features = netdev->hw_features;
368 netdev->vlan_features = netdev->hw_features;
370 if (repr_cap & NFP_NET_CFG_CTRL_RXVLAN)
371 netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_RX;
372 if (repr_cap & NFP_NET_CFG_CTRL_TXVLAN) {
373 if (repr_cap & NFP_NET_CFG_CTRL_LSO2)
374 netdev_warn(netdev, "Device advertises both TSO2 and TXVLAN. Refusing to enable TXVLAN.\n");
376 netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX;
378 if (repr_cap & NFP_NET_CFG_CTRL_CTAG_FILTER)
379 netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
381 netdev->features = netdev->hw_features;
383 /* Advertise but disable TSO by default. */
384 netdev->features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
385 netdev->gso_max_segs = NFP_NET_LSO_MAX_SEGS;
387 netdev->priv_flags |= IFF_NO_QUEUE | IFF_DISABLE_NETPOLL;
388 netdev->features |= NETIF_F_LLTX;
390 if (nfp_app_has_tc(app)) {
391 netdev->features |= NETIF_F_HW_TC;
392 netdev->hw_features |= NETIF_F_HW_TC;
395 err = nfp_app_repr_init(app, netdev);
399 err = register_netdev(netdev);
406 nfp_app_repr_clean(app, netdev);
408 dst_release((struct dst_entry *)repr->dst);
412 static void __nfp_repr_free(struct nfp_repr *repr)
414 free_percpu(repr->stats);
415 free_netdev(repr->netdev);
418 void nfp_repr_free(struct net_device *netdev)
420 __nfp_repr_free(netdev_priv(netdev));
424 nfp_repr_alloc_mqs(struct nfp_app *app, unsigned int txqs, unsigned int rxqs)
426 struct net_device *netdev;
427 struct nfp_repr *repr;
429 netdev = alloc_etherdev_mqs(sizeof(*repr), txqs, rxqs);
433 netif_carrier_off(netdev);
435 repr = netdev_priv(netdev);
436 repr->netdev = netdev;
439 repr->stats = netdev_alloc_pcpu_stats(struct nfp_repr_pcpu_stats);
441 goto err_free_netdev;
450 void nfp_repr_clean_and_free(struct nfp_repr *repr)
452 nfp_info(repr->app->cpp, "Destroying Representor(%s)\n",
454 nfp_repr_clean(repr);
455 __nfp_repr_free(repr);
458 void nfp_reprs_clean_and_free(struct nfp_app *app, struct nfp_reprs *reprs)
460 struct net_device *netdev;
463 for (i = 0; i < reprs->num_reprs; i++) {
464 netdev = nfp_repr_get_locked(app, reprs, i);
466 nfp_repr_clean_and_free(netdev_priv(netdev));
473 nfp_reprs_clean_and_free_by_type(struct nfp_app *app, enum nfp_repr_type type)
475 struct net_device *netdev;
476 struct nfp_reprs *reprs;
479 reprs = rcu_dereference_protected(app->reprs[type],
480 lockdep_is_held(&app->pf->lock));
484 /* Preclean must happen before we remove the reprs reference from the
487 for (i = 0; i < reprs->num_reprs; i++) {
488 netdev = nfp_repr_get_locked(app, reprs, i);
490 nfp_app_repr_preclean(app, netdev);
493 reprs = nfp_app_reprs_set(app, type, NULL);
496 nfp_reprs_clean_and_free(app, reprs);
499 struct nfp_reprs *nfp_reprs_alloc(unsigned int num_reprs)
501 struct nfp_reprs *reprs;
503 reprs = kzalloc(sizeof(*reprs) +
504 num_reprs * sizeof(struct net_device *), GFP_KERNEL);
507 reprs->num_reprs = num_reprs;
512 int nfp_reprs_resync_phys_ports(struct nfp_app *app)
514 struct net_device *netdev;
515 struct nfp_reprs *reprs;
516 struct nfp_repr *repr;
519 reprs = nfp_reprs_get_locked(app, NFP_REPR_TYPE_PHYS_PORT);
523 for (i = 0; i < reprs->num_reprs; i++) {
524 netdev = nfp_repr_get_locked(app, reprs, i);
528 repr = netdev_priv(netdev);
529 if (repr->port->type != NFP_PORT_INVALID)
532 nfp_app_repr_preclean(app, netdev);
534 rcu_assign_pointer(reprs->reprs[i], NULL);
537 nfp_repr_clean(repr);