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 | */ |
15 | static int ice_repr_get_sw_port_id(struct ice_repr *repr) |
16 | { |
17 | return repr->vf->pf->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 |
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(dev: 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, size: len, fmt: "pf%dvfr%d" , ice_repr_get_sw_port_id(repr), |
38 | repr->vf->vf_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 |
50 | ice_repr_get_stats64(struct net_device *netdev, struct rtnl_link_stats64 *stats) |
51 | { |
52 | struct ice_netdev_priv *np = netdev_priv(dev: netdev); |
53 | struct ice_eth_stats *eth_stats; |
54 | struct ice_vsi *vsi; |
55 | |
56 | if (ice_is_vf_disabled(vf: 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 | */ |
79 | struct ice_repr *ice_netdev_to_repr(struct net_device *netdev) |
80 | { |
81 | struct ice_netdev_priv *np = netdev_priv(dev: 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 | */ |
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(dev: netdev); |
107 | netif_tx_start_all_queues(dev: 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 | */ |
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(dev: netdev); |
133 | netif_tx_stop_all_queues(dev: 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 |
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(syncp: &tx_ring->ring_stats->syncp, |
160 | stats: tx_ring->ring_stats->stats, |
161 | pkts: &pkts, bytes: &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(syncp: &rx_ring->ring_stats->syncp, |
167 | stats: rx_ring->ring_stats->stats, |
168 | pkts: &pkts, bytes: &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 |
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 |
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, stats: (struct rtnl_link_stats64 *)sp); |
189 | |
190 | return -EINVAL; |
191 | } |
192 | |
193 | static int |
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(netdev: repr->netdev, vsi: repr->src_vsi, cls_flower: flower); |
200 | case FLOW_CLS_DESTROY: |
201 | return ice_del_cls_flower(vsi: repr->src_vsi, cls_flower: flower); |
202 | default: |
203 | return -EINVAL; |
204 | } |
205 | } |
206 | |
207 | static int |
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(repr: np->repr, flower); |
217 | default: |
218 | return -EOPNOTSUPP; |
219 | } |
220 | } |
221 | |
222 | static LIST_HEAD(ice_repr_block_cb_list); |
223 | |
224 | static int |
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(dev: netdev); |
229 | |
230 | switch (type) { |
231 | case TC_SETUP_BLOCK: |
232 | return flow_block_cb_setup_simple(f: (struct flow_block_offload *) |
233 | type_data, |
234 | driver_list: &ice_repr_block_cb_list, |
235 | cb: ice_repr_setup_tc_block_cb, |
236 | cb_ident: np, cb_priv: np, ingress_only: 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 | */ |
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 |
267 | ice_repr_reg_netdev(struct net_device *netdev) |
268 | { |
269 | eth_hw_addr_random(dev: 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(dev: netdev); |
276 | netif_tx_stop_all_queues(dev: netdev); |
277 | |
278 | return register_netdev(dev: netdev); |
279 | } |
280 | |
281 | /** |
282 | * ice_repr_add - add representor for VF |
283 | * @vf: pointer to VF structure |
284 | */ |
285 | static int ice_repr_add(struct ice_vf *vf) |
286 | { |
287 | struct ice_q_vector *q_vector; |
288 | struct ice_netdev_priv *np; |
289 | struct ice_repr *repr; |
290 | struct ice_vsi *vsi; |
291 | int err; |
292 | |
293 | vsi = ice_get_vf_vsi(vf); |
294 | if (!vsi) |
295 | return -EINVAL; |
296 | |
297 | repr = kzalloc(size: sizeof(*repr), GFP_KERNEL); |
298 | if (!repr) |
299 | return -ENOMEM; |
300 | |
301 | repr->netdev = alloc_etherdev(sizeof(struct ice_netdev_priv)); |
302 | if (!repr->netdev) { |
303 | err = -ENOMEM; |
304 | goto err_alloc; |
305 | } |
306 | |
307 | repr->src_vsi = vsi; |
308 | repr->vf = vf; |
309 | vf->repr = repr; |
310 | np = netdev_priv(dev: repr->netdev); |
311 | np->repr = repr; |
312 | |
313 | q_vector = kzalloc(size: sizeof(*q_vector), GFP_KERNEL); |
314 | if (!q_vector) { |
315 | err = -ENOMEM; |
316 | goto err_alloc_q_vector; |
317 | } |
318 | repr->q_vector = q_vector; |
319 | |
320 | err = ice_devlink_create_vf_port(vf); |
321 | if (err) |
322 | goto err_devlink; |
323 | |
324 | repr->netdev->min_mtu = ETH_MIN_MTU; |
325 | repr->netdev->max_mtu = ICE_MAX_MTU; |
326 | |
327 | SET_NETDEV_DEV(repr->netdev, ice_pf_to_dev(vf->pf)); |
328 | SET_NETDEV_DEVLINK_PORT(repr->netdev, &vf->devlink_port); |
329 | err = ice_repr_reg_netdev(netdev: repr->netdev); |
330 | if (err) |
331 | goto err_netdev; |
332 | |
333 | ice_virtchnl_set_repr_ops(vf); |
334 | |
335 | return 0; |
336 | |
337 | err_netdev: |
338 | ice_devlink_destroy_vf_port(vf); |
339 | err_devlink: |
340 | kfree(objp: repr->q_vector); |
341 | vf->repr->q_vector = NULL; |
342 | err_alloc_q_vector: |
343 | free_netdev(dev: repr->netdev); |
344 | repr->netdev = NULL; |
345 | err_alloc: |
346 | kfree(objp: repr); |
347 | vf->repr = NULL; |
348 | return err; |
349 | } |
350 | |
351 | /** |
352 | * ice_repr_rem - remove representor from VF |
353 | * @vf: pointer to VF structure |
354 | */ |
355 | static void ice_repr_rem(struct ice_vf *vf) |
356 | { |
357 | if (!vf->repr) |
358 | return; |
359 | |
360 | kfree(objp: vf->repr->q_vector); |
361 | vf->repr->q_vector = NULL; |
362 | unregister_netdev(dev: vf->repr->netdev); |
363 | ice_devlink_destroy_vf_port(vf); |
364 | free_netdev(dev: vf->repr->netdev); |
365 | vf->repr->netdev = NULL; |
366 | kfree(objp: vf->repr); |
367 | vf->repr = NULL; |
368 | |
369 | ice_virtchnl_set_dflt_ops(vf); |
370 | } |
371 | |
372 | /** |
373 | * ice_repr_rem_from_all_vfs - remove port representor for all VFs |
374 | * @pf: pointer to PF structure |
375 | */ |
376 | void ice_repr_rem_from_all_vfs(struct ice_pf *pf) |
377 | { |
378 | struct devlink *devlink; |
379 | struct ice_vf *vf; |
380 | unsigned int bkt; |
381 | |
382 | lockdep_assert_held(&pf->vfs.table_lock); |
383 | |
384 | ice_for_each_vf(pf, bkt, vf) |
385 | ice_repr_rem(vf); |
386 | |
387 | /* since all port representors are destroyed, there is |
388 | * no point in keeping the nodes |
389 | */ |
390 | devlink = priv_to_devlink(priv: pf); |
391 | devl_lock(devlink); |
392 | devl_rate_nodes_destroy(devlink); |
393 | devl_unlock(devlink); |
394 | } |
395 | |
396 | /** |
397 | * ice_repr_add_for_all_vfs - add port representor for all VFs |
398 | * @pf: pointer to PF structure |
399 | */ |
400 | int ice_repr_add_for_all_vfs(struct ice_pf *pf) |
401 | { |
402 | struct devlink *devlink; |
403 | struct ice_vf *vf; |
404 | unsigned int bkt; |
405 | int err; |
406 | |
407 | lockdep_assert_held(&pf->vfs.table_lock); |
408 | |
409 | ice_for_each_vf(pf, bkt, vf) { |
410 | err = ice_repr_add(vf); |
411 | if (err) |
412 | goto err; |
413 | } |
414 | |
415 | /* only export if ADQ and DCB disabled */ |
416 | if (ice_is_adq_active(pf) || ice_is_dcb_active(pf)) |
417 | return 0; |
418 | |
419 | devlink = priv_to_devlink(priv: pf); |
420 | ice_devlink_rate_init_tx_topology(devlink, vsi: ice_get_main_vsi(pf)); |
421 | |
422 | return 0; |
423 | |
424 | err: |
425 | ice_repr_rem_from_all_vfs(pf); |
426 | |
427 | return err; |
428 | } |
429 | |
430 | /** |
431 | * ice_repr_start_tx_queues - start Tx queues of port representor |
432 | * @repr: pointer to repr structure |
433 | */ |
434 | void ice_repr_start_tx_queues(struct ice_repr *repr) |
435 | { |
436 | netif_carrier_on(dev: repr->netdev); |
437 | netif_tx_start_all_queues(dev: repr->netdev); |
438 | } |
439 | |
440 | /** |
441 | * ice_repr_stop_tx_queues - stop Tx queues of port representor |
442 | * @repr: pointer to repr structure |
443 | */ |
444 | void ice_repr_stop_tx_queues(struct ice_repr *repr) |
445 | { |
446 | netif_carrier_off(dev: repr->netdev); |
447 | netif_tx_stop_all_queues(dev: repr->netdev); |
448 | } |
449 | |
450 | /** |
451 | * ice_repr_set_traffic_vsi - set traffic VSI for port representor |
452 | * @repr: repr on with VSI will be set |
453 | * @vsi: pointer to VSI that will be used by port representor to pass traffic |
454 | */ |
455 | void ice_repr_set_traffic_vsi(struct ice_repr *repr, struct ice_vsi *vsi) |
456 | { |
457 | struct ice_netdev_priv *np = netdev_priv(dev: repr->netdev); |
458 | |
459 | np->vsi = vsi; |
460 | } |
461 | |