1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (C) 2019-2021, Intel Corporation. */
3
4 #include "ice.h"
5 #include "ice_eswitch.h"
6 #include "ice_devlink.h"
7 #include "ice_sriov.h"
8 #include "ice_tc_lib.h"
9 #include "ice_dcb_lib.h"
10
11 /**
12 * ice_repr_get_sw_port_id - get port ID associated with representor
13 * @repr: pointer to port representor
14 */
ice_repr_get_sw_port_id(struct ice_repr * repr)15 static int ice_repr_get_sw_port_id(struct ice_repr *repr)
16 {
17 return repr->src_vsi->back->hw.port_info->lport;
18 }
19
20 /**
21 * ice_repr_get_phys_port_name - get phys port name
22 * @netdev: pointer to port representor netdev
23 * @buf: write here port name
24 * @len: max length of buf
25 */
26 static int
ice_repr_get_phys_port_name(struct net_device * netdev,char * buf,size_t len)27 ice_repr_get_phys_port_name(struct net_device *netdev, char *buf, size_t len)
28 {
29 struct ice_netdev_priv *np = netdev_priv(netdev);
30 struct ice_repr *repr = np->repr;
31 int res;
32
33 /* Devlink port is registered and devlink core is taking care of name formatting. */
34 if (repr->vf->devlink_port.devlink)
35 return -EOPNOTSUPP;
36
37 res = snprintf(buf, len, "pf%dvfr%d", ice_repr_get_sw_port_id(repr),
38 repr->id);
39 if (res <= 0)
40 return -EOPNOTSUPP;
41 return 0;
42 }
43
44 /**
45 * ice_repr_get_stats64 - get VF stats for VFPR use
46 * @netdev: pointer to port representor netdev
47 * @stats: pointer to struct where stats can be stored
48 */
49 static void
ice_repr_get_stats64(struct net_device * netdev,struct rtnl_link_stats64 * stats)50 ice_repr_get_stats64(struct net_device *netdev, struct rtnl_link_stats64 *stats)
51 {
52 struct ice_netdev_priv *np = netdev_priv(netdev);
53 struct ice_eth_stats *eth_stats;
54 struct ice_vsi *vsi;
55
56 if (ice_is_vf_disabled(np->repr->vf))
57 return;
58 vsi = np->repr->src_vsi;
59
60 ice_update_vsi_stats(vsi);
61 eth_stats = &vsi->eth_stats;
62
63 stats->tx_packets = eth_stats->tx_unicast + eth_stats->tx_broadcast +
64 eth_stats->tx_multicast;
65 stats->rx_packets = eth_stats->rx_unicast + eth_stats->rx_broadcast +
66 eth_stats->rx_multicast;
67 stats->tx_bytes = eth_stats->tx_bytes;
68 stats->rx_bytes = eth_stats->rx_bytes;
69 stats->multicast = eth_stats->rx_multicast;
70 stats->tx_errors = eth_stats->tx_errors;
71 stats->tx_dropped = eth_stats->tx_discards;
72 stats->rx_dropped = eth_stats->rx_discards;
73 }
74
75 /**
76 * ice_netdev_to_repr - Get port representor for given netdevice
77 * @netdev: pointer to port representor netdev
78 */
ice_netdev_to_repr(struct net_device * netdev)79 struct ice_repr *ice_netdev_to_repr(struct net_device *netdev)
80 {
81 struct ice_netdev_priv *np = netdev_priv(netdev);
82
83 return np->repr;
84 }
85
86 /**
87 * ice_repr_open - Enable port representor's network interface
88 * @netdev: network interface device structure
89 *
90 * The open entry point is called when a port representor's network
91 * interface is made active by the system (IFF_UP). Corresponding
92 * VF is notified about link status change.
93 *
94 * Returns 0 on success
95 */
ice_repr_open(struct net_device * netdev)96 static int ice_repr_open(struct net_device *netdev)
97 {
98 struct ice_repr *repr = ice_netdev_to_repr(netdev);
99 struct ice_vf *vf;
100
101 vf = repr->vf;
102 vf->link_forced = true;
103 vf->link_up = true;
104 ice_vc_notify_vf_link_state(vf);
105
106 netif_carrier_on(netdev);
107 netif_tx_start_all_queues(netdev);
108
109 return 0;
110 }
111
112 /**
113 * ice_repr_stop - Disable port representor's network interface
114 * @netdev: network interface device structure
115 *
116 * The stop entry point is called when a port representor's network
117 * interface is de-activated by the system. Corresponding
118 * VF is notified about link status change.
119 *
120 * Returns 0 on success
121 */
ice_repr_stop(struct net_device * netdev)122 static int ice_repr_stop(struct net_device *netdev)
123 {
124 struct ice_repr *repr = ice_netdev_to_repr(netdev);
125 struct ice_vf *vf;
126
127 vf = repr->vf;
128 vf->link_forced = true;
129 vf->link_up = false;
130 ice_vc_notify_vf_link_state(vf);
131
132 netif_carrier_off(netdev);
133 netif_tx_stop_all_queues(netdev);
134
135 return 0;
136 }
137
138 /**
139 * ice_repr_sp_stats64 - get slow path stats for port representor
140 * @dev: network interface device structure
141 * @stats: netlink stats structure
142 *
143 * RX/TX stats are being swapped here to be consistent with VF stats. In slow
144 * path, port representor receives data when the corresponding VF is sending it
145 * (and vice versa), TX and RX bytes/packets are effectively swapped on port
146 * representor.
147 */
148 static int
ice_repr_sp_stats64(const struct net_device * dev,struct rtnl_link_stats64 * stats)149 ice_repr_sp_stats64(const struct net_device *dev,
150 struct rtnl_link_stats64 *stats)
151 {
152 struct ice_netdev_priv *np = netdev_priv(dev);
153 int vf_id = np->repr->vf->vf_id;
154 struct ice_tx_ring *tx_ring;
155 struct ice_rx_ring *rx_ring;
156 u64 pkts, bytes;
157
158 tx_ring = np->vsi->tx_rings[vf_id];
159 ice_fetch_u64_stats_per_ring(&tx_ring->ring_stats->syncp,
160 tx_ring->ring_stats->stats,
161 &pkts, &bytes);
162 stats->rx_packets = pkts;
163 stats->rx_bytes = bytes;
164
165 rx_ring = np->vsi->rx_rings[vf_id];
166 ice_fetch_u64_stats_per_ring(&rx_ring->ring_stats->syncp,
167 rx_ring->ring_stats->stats,
168 &pkts, &bytes);
169 stats->tx_packets = pkts;
170 stats->tx_bytes = bytes;
171 stats->tx_dropped = rx_ring->ring_stats->rx_stats.alloc_page_failed +
172 rx_ring->ring_stats->rx_stats.alloc_buf_failed;
173
174 return 0;
175 }
176
177 static bool
ice_repr_ndo_has_offload_stats(const struct net_device * dev,int attr_id)178 ice_repr_ndo_has_offload_stats(const struct net_device *dev, int attr_id)
179 {
180 return attr_id == IFLA_OFFLOAD_XSTATS_CPU_HIT;
181 }
182
183 static int
ice_repr_ndo_get_offload_stats(int attr_id,const struct net_device * dev,void * sp)184 ice_repr_ndo_get_offload_stats(int attr_id, const struct net_device *dev,
185 void *sp)
186 {
187 if (attr_id == IFLA_OFFLOAD_XSTATS_CPU_HIT)
188 return ice_repr_sp_stats64(dev, (struct rtnl_link_stats64 *)sp);
189
190 return -EINVAL;
191 }
192
193 static int
ice_repr_setup_tc_cls_flower(struct ice_repr * repr,struct flow_cls_offload * flower)194 ice_repr_setup_tc_cls_flower(struct ice_repr *repr,
195 struct flow_cls_offload *flower)
196 {
197 switch (flower->command) {
198 case FLOW_CLS_REPLACE:
199 return ice_add_cls_flower(repr->netdev, repr->src_vsi, flower);
200 case FLOW_CLS_DESTROY:
201 return ice_del_cls_flower(repr->src_vsi, flower);
202 default:
203 return -EINVAL;
204 }
205 }
206
207 static int
ice_repr_setup_tc_block_cb(enum tc_setup_type type,void * type_data,void * cb_priv)208 ice_repr_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
209 void *cb_priv)
210 {
211 struct flow_cls_offload *flower = (struct flow_cls_offload *)type_data;
212 struct ice_netdev_priv *np = (struct ice_netdev_priv *)cb_priv;
213
214 switch (type) {
215 case TC_SETUP_CLSFLOWER:
216 return ice_repr_setup_tc_cls_flower(np->repr, flower);
217 default:
218 return -EOPNOTSUPP;
219 }
220 }
221
222 static LIST_HEAD(ice_repr_block_cb_list);
223
224 static int
ice_repr_setup_tc(struct net_device * netdev,enum tc_setup_type type,void * type_data)225 ice_repr_setup_tc(struct net_device *netdev, enum tc_setup_type type,
226 void *type_data)
227 {
228 struct ice_netdev_priv *np = netdev_priv(netdev);
229
230 switch (type) {
231 case TC_SETUP_BLOCK:
232 return flow_block_cb_setup_simple((struct flow_block_offload *)
233 type_data,
234 &ice_repr_block_cb_list,
235 ice_repr_setup_tc_block_cb,
236 np, np, true);
237 default:
238 return -EOPNOTSUPP;
239 }
240 }
241
242 static const struct net_device_ops ice_repr_netdev_ops = {
243 .ndo_get_phys_port_name = ice_repr_get_phys_port_name,
244 .ndo_get_stats64 = ice_repr_get_stats64,
245 .ndo_open = ice_repr_open,
246 .ndo_stop = ice_repr_stop,
247 .ndo_start_xmit = ice_eswitch_port_start_xmit,
248 .ndo_setup_tc = ice_repr_setup_tc,
249 .ndo_has_offload_stats = ice_repr_ndo_has_offload_stats,
250 .ndo_get_offload_stats = ice_repr_ndo_get_offload_stats,
251 };
252
253 /**
254 * ice_is_port_repr_netdev - Check if a given netdevice is a port representor netdev
255 * @netdev: pointer to netdev
256 */
ice_is_port_repr_netdev(const struct net_device * netdev)257 bool ice_is_port_repr_netdev(const struct net_device *netdev)
258 {
259 return netdev && (netdev->netdev_ops == &ice_repr_netdev_ops);
260 }
261
262 /**
263 * ice_repr_reg_netdev - register port representor netdev
264 * @netdev: pointer to port representor netdev
265 */
266 static int
ice_repr_reg_netdev(struct net_device * netdev)267 ice_repr_reg_netdev(struct net_device *netdev)
268 {
269 eth_hw_addr_random(netdev);
270 netdev->netdev_ops = &ice_repr_netdev_ops;
271 ice_set_ethtool_repr_ops(netdev);
272
273 netdev->hw_features |= NETIF_F_HW_TC;
274
275 netif_carrier_off(netdev);
276 netif_tx_stop_all_queues(netdev);
277
278 return register_netdev(netdev);
279 }
280
ice_repr_remove_node(struct devlink_port * devlink_port)281 static void ice_repr_remove_node(struct devlink_port *devlink_port)
282 {
283 devl_lock(devlink_port->devlink);
284 devl_rate_leaf_destroy(devlink_port);
285 devl_unlock(devlink_port->devlink);
286 }
287
288 /**
289 * ice_repr_rem - remove representor from VF
290 * @repr: pointer to representor structure
291 */
ice_repr_rem(struct ice_repr * repr)292 static void ice_repr_rem(struct ice_repr *repr)
293 {
294 kfree(repr->q_vector);
295 free_netdev(repr->netdev);
296 kfree(repr);
297 }
298
299 /**
300 * ice_repr_rem_vf - remove representor from VF
301 * @repr: pointer to representor structure
302 */
ice_repr_rem_vf(struct ice_repr * repr)303 void ice_repr_rem_vf(struct ice_repr *repr)
304 {
305 ice_repr_remove_node(&repr->vf->devlink_port);
306 unregister_netdev(repr->netdev);
307 ice_devlink_destroy_vf_port(repr->vf);
308 ice_virtchnl_set_dflt_ops(repr->vf);
309 ice_repr_rem(repr);
310 }
311
ice_repr_set_tx_topology(struct ice_pf * pf)312 static void ice_repr_set_tx_topology(struct ice_pf *pf)
313 {
314 struct devlink *devlink;
315
316 /* only export if ADQ and DCB disabled and eswitch enabled*/
317 if (ice_is_adq_active(pf) || ice_is_dcb_active(pf) ||
318 !ice_is_switchdev_running(pf))
319 return;
320
321 devlink = priv_to_devlink(pf);
322 ice_devlink_rate_init_tx_topology(devlink, ice_get_main_vsi(pf));
323 }
324
325 /**
326 * ice_repr_add - add representor for generic VSI
327 * @pf: pointer to PF structure
328 * @src_vsi: pointer to VSI structure of device to represent
329 * @parent_mac: device MAC address
330 */
331 static struct ice_repr *
ice_repr_add(struct ice_pf * pf,struct ice_vsi * src_vsi,const u8 * parent_mac)332 ice_repr_add(struct ice_pf *pf, struct ice_vsi *src_vsi, const u8 *parent_mac)
333 {
334 struct ice_q_vector *q_vector;
335 struct ice_netdev_priv *np;
336 struct ice_repr *repr;
337 int err;
338
339 repr = kzalloc(sizeof(*repr), GFP_KERNEL);
340 if (!repr)
341 return ERR_PTR(-ENOMEM);
342
343 repr->netdev = alloc_etherdev(sizeof(struct ice_netdev_priv));
344 if (!repr->netdev) {
345 err = -ENOMEM;
346 goto err_alloc;
347 }
348
349 repr->src_vsi = src_vsi;
350 np = netdev_priv(repr->netdev);
351 np->repr = repr;
352
353 q_vector = kzalloc(sizeof(*q_vector), GFP_KERNEL);
354 if (!q_vector) {
355 err = -ENOMEM;
356 goto err_alloc_q_vector;
357 }
358 repr->q_vector = q_vector;
359 repr->q_id = repr->id;
360
361 ether_addr_copy(repr->parent_mac, parent_mac);
362
363 return repr;
364
365 err_alloc_q_vector:
366 free_netdev(repr->netdev);
367 err_alloc:
368 kfree(repr);
369 return ERR_PTR(err);
370 }
371
ice_repr_add_vf(struct ice_vf * vf)372 struct ice_repr *ice_repr_add_vf(struct ice_vf *vf)
373 {
374 struct ice_repr *repr;
375 struct ice_vsi *vsi;
376 int err;
377
378 vsi = ice_get_vf_vsi(vf);
379 if (!vsi)
380 return ERR_PTR(-ENOENT);
381
382 err = ice_devlink_create_vf_port(vf);
383 if (err)
384 return ERR_PTR(err);
385
386 repr = ice_repr_add(vf->pf, vsi, vf->hw_lan_addr);
387 if (IS_ERR(repr)) {
388 err = PTR_ERR(repr);
389 goto err_repr_add;
390 }
391
392 repr->vf = vf;
393
394 repr->netdev->min_mtu = ETH_MIN_MTU;
395 repr->netdev->max_mtu = ICE_MAX_MTU;
396
397 SET_NETDEV_DEV(repr->netdev, ice_pf_to_dev(vf->pf));
398 SET_NETDEV_DEVLINK_PORT(repr->netdev, &vf->devlink_port);
399 err = ice_repr_reg_netdev(repr->netdev);
400 if (err)
401 goto err_netdev;
402
403 ice_virtchnl_set_repr_ops(vf);
404 ice_repr_set_tx_topology(vf->pf);
405
406 return repr;
407
408 err_netdev:
409 ice_repr_rem(repr);
410 err_repr_add:
411 ice_devlink_destroy_vf_port(vf);
412 return ERR_PTR(err);
413 }
414
ice_repr_get_by_vsi(struct ice_vsi * vsi)415 struct ice_repr *ice_repr_get_by_vsi(struct ice_vsi *vsi)
416 {
417 if (!vsi->vf)
418 return NULL;
419
420 return xa_load(&vsi->back->eswitch.reprs, vsi->vf->repr_id);
421 }
422
423 /**
424 * ice_repr_start_tx_queues - start Tx queues of port representor
425 * @repr: pointer to repr structure
426 */
ice_repr_start_tx_queues(struct ice_repr * repr)427 void ice_repr_start_tx_queues(struct ice_repr *repr)
428 {
429 netif_carrier_on(repr->netdev);
430 netif_tx_start_all_queues(repr->netdev);
431 }
432
433 /**
434 * ice_repr_stop_tx_queues - stop Tx queues of port representor
435 * @repr: pointer to repr structure
436 */
ice_repr_stop_tx_queues(struct ice_repr * repr)437 void ice_repr_stop_tx_queues(struct ice_repr *repr)
438 {
439 netif_carrier_off(repr->netdev);
440 netif_tx_stop_all_queues(repr->netdev);
441 }
442
443 /**
444 * ice_repr_set_traffic_vsi - set traffic VSI for port representor
445 * @repr: repr on with VSI will be set
446 * @vsi: pointer to VSI that will be used by port representor to pass traffic
447 */
ice_repr_set_traffic_vsi(struct ice_repr * repr,struct ice_vsi * vsi)448 void ice_repr_set_traffic_vsi(struct ice_repr *repr, struct ice_vsi *vsi)
449 {
450 struct ice_netdev_priv *np = netdev_priv(repr->netdev);
451
452 np->vsi = vsi;
453 }
454