1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
2 /* Copyright (c) 2021 Mellanox Technologies Ltd */
3 
4 #include <linux/etherdevice.h>
5 #include <linux/mlx5/driver.h>
6 #include <linux/mlx5/mlx5_ifc.h>
7 #include <linux/mlx5/vport.h>
8 #include <linux/mlx5/fs.h>
9 #include "esw/acl/lgcy.h"
10 #include "esw/legacy.h"
11 #include "mlx5_core.h"
12 #include "eswitch.h"
13 #include "fs_core.h"
14 #include "esw/qos.h"
15 
16 enum {
17 	LEGACY_VEPA_PRIO = 0,
18 	LEGACY_FDB_PRIO,
19 };
20 
esw_create_legacy_vepa_table(struct mlx5_eswitch * esw)21 static int esw_create_legacy_vepa_table(struct mlx5_eswitch *esw)
22 {
23 	struct mlx5_flow_table_attr ft_attr = {};
24 	struct mlx5_core_dev *dev = esw->dev;
25 	struct mlx5_flow_namespace *root_ns;
26 	struct mlx5_flow_table *fdb;
27 	int err;
28 
29 	root_ns = mlx5_get_fdb_sub_ns(dev, 0);
30 	if (!root_ns) {
31 		esw_warn(dev, "Failed to get FDB flow namespace\n");
32 		return -EOPNOTSUPP;
33 	}
34 
35 	/* num FTE 2, num FG 2 */
36 	ft_attr.prio = LEGACY_VEPA_PRIO;
37 	ft_attr.max_fte = 2;
38 	ft_attr.autogroup.max_num_groups = 2;
39 	fdb = mlx5_create_auto_grouped_flow_table(root_ns, &ft_attr);
40 	if (IS_ERR(fdb)) {
41 		err = PTR_ERR(fdb);
42 		esw_warn(dev, "Failed to create VEPA FDB err %d\n", err);
43 		return err;
44 	}
45 	esw->fdb_table.legacy.vepa_fdb = fdb;
46 
47 	return 0;
48 }
49 
esw_destroy_legacy_fdb_table(struct mlx5_eswitch * esw)50 static void esw_destroy_legacy_fdb_table(struct mlx5_eswitch *esw)
51 {
52 	esw_debug(esw->dev, "Destroy FDB Table\n");
53 	if (!esw->fdb_table.legacy.fdb)
54 		return;
55 
56 	if (esw->fdb_table.legacy.promisc_grp)
57 		mlx5_destroy_flow_group(esw->fdb_table.legacy.promisc_grp);
58 	if (esw->fdb_table.legacy.allmulti_grp)
59 		mlx5_destroy_flow_group(esw->fdb_table.legacy.allmulti_grp);
60 	if (esw->fdb_table.legacy.addr_grp)
61 		mlx5_destroy_flow_group(esw->fdb_table.legacy.addr_grp);
62 	mlx5_destroy_flow_table(esw->fdb_table.legacy.fdb);
63 
64 	esw->fdb_table.legacy.fdb = NULL;
65 	esw->fdb_table.legacy.addr_grp = NULL;
66 	esw->fdb_table.legacy.allmulti_grp = NULL;
67 	esw->fdb_table.legacy.promisc_grp = NULL;
68 	atomic64_set(&esw->user_count, 0);
69 }
70 
esw_create_legacy_fdb_table(struct mlx5_eswitch * esw)71 static int esw_create_legacy_fdb_table(struct mlx5_eswitch *esw)
72 {
73 	int inlen = MLX5_ST_SZ_BYTES(create_flow_group_in);
74 	struct mlx5_flow_table_attr ft_attr = {};
75 	struct mlx5_core_dev *dev = esw->dev;
76 	struct mlx5_flow_namespace *root_ns;
77 	struct mlx5_flow_table *fdb;
78 	struct mlx5_flow_group *g;
79 	void *match_criteria;
80 	int table_size;
81 	u32 *flow_group_in;
82 	u8 *dmac;
83 	int err = 0;
84 
85 	esw_debug(dev, "Create FDB log_max_size(%d)\n",
86 		  MLX5_CAP_ESW_FLOWTABLE_FDB(dev, log_max_ft_size));
87 
88 	root_ns = mlx5_get_fdb_sub_ns(dev, 0);
89 	if (!root_ns) {
90 		esw_warn(dev, "Failed to get FDB flow namespace\n");
91 		return -EOPNOTSUPP;
92 	}
93 
94 	flow_group_in = kvzalloc(inlen, GFP_KERNEL);
95 	if (!flow_group_in)
96 		return -ENOMEM;
97 
98 	table_size = BIT(MLX5_CAP_ESW_FLOWTABLE_FDB(dev, log_max_ft_size));
99 	ft_attr.max_fte = table_size;
100 	ft_attr.prio = LEGACY_FDB_PRIO;
101 	fdb = mlx5_create_flow_table(root_ns, &ft_attr);
102 	if (IS_ERR(fdb)) {
103 		err = PTR_ERR(fdb);
104 		esw_warn(dev, "Failed to create FDB Table err %d\n", err);
105 		goto out;
106 	}
107 	esw->fdb_table.legacy.fdb = fdb;
108 
109 	/* Addresses group : Full match unicast/multicast addresses */
110 	MLX5_SET(create_flow_group_in, flow_group_in, match_criteria_enable,
111 		 MLX5_MATCH_OUTER_HEADERS);
112 	match_criteria = MLX5_ADDR_OF(create_flow_group_in, flow_group_in, match_criteria);
113 	dmac = MLX5_ADDR_OF(fte_match_param, match_criteria, outer_headers.dmac_47_16);
114 	MLX5_SET(create_flow_group_in, flow_group_in, start_flow_index, 0);
115 	/* Preserve 2 entries for allmulti and promisc rules*/
116 	MLX5_SET(create_flow_group_in, flow_group_in, end_flow_index, table_size - 3);
117 	eth_broadcast_addr(dmac);
118 	g = mlx5_create_flow_group(fdb, flow_group_in);
119 	if (IS_ERR(g)) {
120 		err = PTR_ERR(g);
121 		esw_warn(dev, "Failed to create flow group err(%d)\n", err);
122 		goto out;
123 	}
124 	esw->fdb_table.legacy.addr_grp = g;
125 
126 	/* Allmulti group : One rule that forwards any mcast traffic */
127 	MLX5_SET(create_flow_group_in, flow_group_in, match_criteria_enable,
128 		 MLX5_MATCH_OUTER_HEADERS);
129 	MLX5_SET(create_flow_group_in, flow_group_in, start_flow_index, table_size - 2);
130 	MLX5_SET(create_flow_group_in, flow_group_in, end_flow_index, table_size - 2);
131 	eth_zero_addr(dmac);
132 	dmac[0] = 0x01;
133 	g = mlx5_create_flow_group(fdb, flow_group_in);
134 	if (IS_ERR(g)) {
135 		err = PTR_ERR(g);
136 		esw_warn(dev, "Failed to create allmulti flow group err(%d)\n", err);
137 		goto out;
138 	}
139 	esw->fdb_table.legacy.allmulti_grp = g;
140 
141 	/* Promiscuous group :
142 	 * One rule that forward all unmatched traffic from previous groups
143 	 */
144 	eth_zero_addr(dmac);
145 	MLX5_SET(create_flow_group_in, flow_group_in, match_criteria_enable,
146 		 MLX5_MATCH_MISC_PARAMETERS);
147 	MLX5_SET_TO_ONES(fte_match_param, match_criteria, misc_parameters.source_port);
148 	MLX5_SET(create_flow_group_in, flow_group_in, start_flow_index, table_size - 1);
149 	MLX5_SET(create_flow_group_in, flow_group_in, end_flow_index, table_size - 1);
150 	g = mlx5_create_flow_group(fdb, flow_group_in);
151 	if (IS_ERR(g)) {
152 		err = PTR_ERR(g);
153 		esw_warn(dev, "Failed to create promisc flow group err(%d)\n", err);
154 		goto out;
155 	}
156 	esw->fdb_table.legacy.promisc_grp = g;
157 
158 out:
159 	if (err)
160 		esw_destroy_legacy_fdb_table(esw);
161 
162 	kvfree(flow_group_in);
163 	return err;
164 }
165 
esw_destroy_legacy_vepa_table(struct mlx5_eswitch * esw)166 static void esw_destroy_legacy_vepa_table(struct mlx5_eswitch *esw)
167 {
168 	esw_debug(esw->dev, "Destroy VEPA Table\n");
169 	if (!esw->fdb_table.legacy.vepa_fdb)
170 		return;
171 
172 	mlx5_destroy_flow_table(esw->fdb_table.legacy.vepa_fdb);
173 	esw->fdb_table.legacy.vepa_fdb = NULL;
174 }
175 
esw_create_legacy_table(struct mlx5_eswitch * esw)176 static int esw_create_legacy_table(struct mlx5_eswitch *esw)
177 {
178 	int err;
179 
180 	memset(&esw->fdb_table.legacy, 0, sizeof(struct legacy_fdb));
181 	atomic64_set(&esw->user_count, 0);
182 
183 	err = esw_create_legacy_vepa_table(esw);
184 	if (err)
185 		return err;
186 
187 	err = esw_create_legacy_fdb_table(esw);
188 	if (err)
189 		esw_destroy_legacy_vepa_table(esw);
190 
191 	return err;
192 }
193 
esw_cleanup_vepa_rules(struct mlx5_eswitch * esw)194 static void esw_cleanup_vepa_rules(struct mlx5_eswitch *esw)
195 {
196 	if (esw->fdb_table.legacy.vepa_uplink_rule)
197 		mlx5_del_flow_rules(esw->fdb_table.legacy.vepa_uplink_rule);
198 
199 	if (esw->fdb_table.legacy.vepa_star_rule)
200 		mlx5_del_flow_rules(esw->fdb_table.legacy.vepa_star_rule);
201 
202 	esw->fdb_table.legacy.vepa_uplink_rule = NULL;
203 	esw->fdb_table.legacy.vepa_star_rule = NULL;
204 }
205 
esw_destroy_legacy_table(struct mlx5_eswitch * esw)206 static void esw_destroy_legacy_table(struct mlx5_eswitch *esw)
207 {
208 	esw_cleanup_vepa_rules(esw);
209 	esw_destroy_legacy_fdb_table(esw);
210 	esw_destroy_legacy_vepa_table(esw);
211 }
212 
213 #define MLX5_LEGACY_SRIOV_VPORT_EVENTS (MLX5_VPORT_UC_ADDR_CHANGE | \
214 					MLX5_VPORT_MC_ADDR_CHANGE | \
215 					MLX5_VPORT_PROMISC_CHANGE)
216 
esw_legacy_enable(struct mlx5_eswitch * esw)217 int esw_legacy_enable(struct mlx5_eswitch *esw)
218 {
219 	struct mlx5_vport *vport;
220 	unsigned long i;
221 	int ret;
222 
223 	ret = esw_create_legacy_table(esw);
224 	if (ret)
225 		return ret;
226 
227 	mlx5_esw_for_each_vf_vport(esw, i, vport, esw->esw_funcs.num_vfs)
228 		vport->info.link_state = MLX5_VPORT_ADMIN_STATE_AUTO;
229 
230 	ret = mlx5_eswitch_enable_pf_vf_vports(esw, MLX5_LEGACY_SRIOV_VPORT_EVENTS);
231 	if (ret)
232 		esw_destroy_legacy_table(esw);
233 	return ret;
234 }
235 
esw_legacy_disable(struct mlx5_eswitch * esw)236 void esw_legacy_disable(struct mlx5_eswitch *esw)
237 {
238 	struct esw_mc_addr *mc_promisc;
239 
240 	mlx5_eswitch_disable_pf_vf_vports(esw);
241 
242 	mc_promisc = &esw->mc_promisc;
243 	if (mc_promisc->uplink_rule)
244 		mlx5_del_flow_rules(mc_promisc->uplink_rule);
245 
246 	esw_destroy_legacy_table(esw);
247 }
248 
_mlx5_eswitch_set_vepa_locked(struct mlx5_eswitch * esw,u8 setting)249 static int _mlx5_eswitch_set_vepa_locked(struct mlx5_eswitch *esw,
250 					 u8 setting)
251 {
252 	struct mlx5_flow_destination dest = {};
253 	struct mlx5_flow_act flow_act = {};
254 	struct mlx5_flow_handle *flow_rule;
255 	struct mlx5_flow_spec *spec;
256 	int err = 0;
257 	void *misc;
258 
259 	if (!setting) {
260 		esw_cleanup_vepa_rules(esw);
261 		return 0;
262 	}
263 
264 	if (esw->fdb_table.legacy.vepa_uplink_rule)
265 		return 0;
266 
267 	spec = kvzalloc(sizeof(*spec), GFP_KERNEL);
268 	if (!spec)
269 		return -ENOMEM;
270 
271 	/* Uplink rule forward uplink traffic to FDB */
272 	misc = MLX5_ADDR_OF(fte_match_param, spec->match_value, misc_parameters);
273 	MLX5_SET(fte_match_set_misc, misc, source_port, MLX5_VPORT_UPLINK);
274 
275 	misc = MLX5_ADDR_OF(fte_match_param, spec->match_criteria, misc_parameters);
276 	MLX5_SET_TO_ONES(fte_match_set_misc, misc, source_port);
277 
278 	spec->match_criteria_enable = MLX5_MATCH_MISC_PARAMETERS;
279 	dest.type = MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE;
280 	dest.ft = esw->fdb_table.legacy.fdb;
281 	flow_act.action = MLX5_FLOW_CONTEXT_ACTION_FWD_DEST;
282 	flow_rule = mlx5_add_flow_rules(esw->fdb_table.legacy.vepa_fdb, spec,
283 					&flow_act, &dest, 1);
284 	if (IS_ERR(flow_rule)) {
285 		err = PTR_ERR(flow_rule);
286 		goto out;
287 	} else {
288 		esw->fdb_table.legacy.vepa_uplink_rule = flow_rule;
289 	}
290 
291 	/* Star rule to forward all traffic to uplink vport */
292 	memset(&dest, 0, sizeof(dest));
293 	dest.type = MLX5_FLOW_DESTINATION_TYPE_VPORT;
294 	dest.vport.num = MLX5_VPORT_UPLINK;
295 	flow_act.action = MLX5_FLOW_CONTEXT_ACTION_FWD_DEST;
296 	flow_rule = mlx5_add_flow_rules(esw->fdb_table.legacy.vepa_fdb, NULL,
297 					&flow_act, &dest, 1);
298 	if (IS_ERR(flow_rule)) {
299 		err = PTR_ERR(flow_rule);
300 		goto out;
301 	} else {
302 		esw->fdb_table.legacy.vepa_star_rule = flow_rule;
303 	}
304 
305 out:
306 	kvfree(spec);
307 	if (err)
308 		esw_cleanup_vepa_rules(esw);
309 	return err;
310 }
311 
mlx5_eswitch_set_vepa(struct mlx5_eswitch * esw,u8 setting)312 int mlx5_eswitch_set_vepa(struct mlx5_eswitch *esw, u8 setting)
313 {
314 	int err = 0;
315 
316 	if (!esw)
317 		return -EOPNOTSUPP;
318 
319 	if (!mlx5_esw_allowed(esw))
320 		return -EPERM;
321 
322 	mutex_lock(&esw->state_lock);
323 	if (esw->mode != MLX5_ESWITCH_LEGACY) {
324 		err = -EOPNOTSUPP;
325 		goto out;
326 	}
327 
328 	err = _mlx5_eswitch_set_vepa_locked(esw, setting);
329 
330 out:
331 	mutex_unlock(&esw->state_lock);
332 	return err;
333 }
334 
mlx5_eswitch_get_vepa(struct mlx5_eswitch * esw,u8 * setting)335 int mlx5_eswitch_get_vepa(struct mlx5_eswitch *esw, u8 *setting)
336 {
337 	if (!esw)
338 		return -EOPNOTSUPP;
339 
340 	if (!mlx5_esw_allowed(esw))
341 		return -EPERM;
342 
343 	if (esw->mode != MLX5_ESWITCH_LEGACY)
344 		return -EOPNOTSUPP;
345 
346 	*setting = esw->fdb_table.legacy.vepa_uplink_rule ? 1 : 0;
347 	return 0;
348 }
349 
esw_legacy_vport_acl_setup(struct mlx5_eswitch * esw,struct mlx5_vport * vport)350 int esw_legacy_vport_acl_setup(struct mlx5_eswitch *esw, struct mlx5_vport *vport)
351 {
352 	int ret;
353 
354 	/* Only non manager vports need ACL in legacy mode */
355 	if (mlx5_esw_is_manager_vport(esw, vport->vport))
356 		return 0;
357 
358 	ret = esw_acl_ingress_lgcy_setup(esw, vport);
359 	if (ret)
360 		goto ingress_err;
361 
362 	ret = esw_acl_egress_lgcy_setup(esw, vport);
363 	if (ret)
364 		goto egress_err;
365 
366 	return 0;
367 
368 egress_err:
369 	esw_acl_ingress_lgcy_cleanup(esw, vport);
370 ingress_err:
371 	return ret;
372 }
373 
esw_legacy_vport_acl_cleanup(struct mlx5_eswitch * esw,struct mlx5_vport * vport)374 void esw_legacy_vport_acl_cleanup(struct mlx5_eswitch *esw, struct mlx5_vport *vport)
375 {
376 	if (mlx5_esw_is_manager_vport(esw, vport->vport))
377 		return;
378 
379 	esw_acl_egress_lgcy_cleanup(esw, vport);
380 	esw_acl_ingress_lgcy_cleanup(esw, vport);
381 }
382 
mlx5_esw_query_vport_drop_stats(struct mlx5_core_dev * dev,struct mlx5_vport * vport,struct mlx5_vport_drop_stats * stats)383 int mlx5_esw_query_vport_drop_stats(struct mlx5_core_dev *dev,
384 				    struct mlx5_vport *vport,
385 				    struct mlx5_vport_drop_stats *stats)
386 {
387 	u64 rx_discard_vport_down, tx_discard_vport_down;
388 	struct mlx5_eswitch *esw = dev->priv.eswitch;
389 	u64 bytes = 0;
390 	int err = 0;
391 
392 	if (esw->mode != MLX5_ESWITCH_LEGACY)
393 		return 0;
394 
395 	mutex_lock(&esw->state_lock);
396 	if (!vport->enabled)
397 		goto unlock;
398 
399 	if (!IS_ERR_OR_NULL(vport->egress.legacy.drop_counter))
400 		mlx5_fc_query(dev, vport->egress.legacy.drop_counter,
401 			      &stats->rx_dropped, &bytes);
402 
403 	if (vport->ingress.legacy.drop_counter)
404 		mlx5_fc_query(dev, vport->ingress.legacy.drop_counter,
405 			      &stats->tx_dropped, &bytes);
406 
407 	if (!MLX5_CAP_GEN(dev, receive_discard_vport_down) &&
408 	    !MLX5_CAP_GEN(dev, transmit_discard_vport_down))
409 		goto unlock;
410 
411 	err = mlx5_query_vport_down_stats(dev, vport->vport, 1,
412 					  &rx_discard_vport_down,
413 					  &tx_discard_vport_down);
414 	if (err)
415 		goto unlock;
416 
417 	if (MLX5_CAP_GEN(dev, receive_discard_vport_down))
418 		stats->rx_dropped += rx_discard_vport_down;
419 	if (MLX5_CAP_GEN(dev, transmit_discard_vport_down))
420 		stats->tx_dropped += tx_discard_vport_down;
421 
422 unlock:
423 	mutex_unlock(&esw->state_lock);
424 	return err;
425 }
426 
mlx5_eswitch_set_vport_vlan(struct mlx5_eswitch * esw,u16 vport,u16 vlan,u8 qos)427 int mlx5_eswitch_set_vport_vlan(struct mlx5_eswitch *esw,
428 				u16 vport, u16 vlan, u8 qos)
429 {
430 	u8 set_flags = 0;
431 	int err = 0;
432 
433 	if (!mlx5_esw_allowed(esw))
434 		return -EPERM;
435 
436 	if (vlan || qos)
437 		set_flags = SET_VLAN_STRIP | SET_VLAN_INSERT;
438 
439 	mutex_lock(&esw->state_lock);
440 	if (esw->mode != MLX5_ESWITCH_LEGACY) {
441 		if (!vlan)
442 			goto unlock; /* compatibility with libvirt */
443 
444 		err = -EOPNOTSUPP;
445 		goto unlock;
446 	}
447 
448 	err = __mlx5_eswitch_set_vport_vlan(esw, vport, vlan, qos, set_flags);
449 
450 unlock:
451 	mutex_unlock(&esw->state_lock);
452 	return err;
453 }
454 
mlx5_eswitch_set_vport_spoofchk(struct mlx5_eswitch * esw,u16 vport,bool spoofchk)455 int mlx5_eswitch_set_vport_spoofchk(struct mlx5_eswitch *esw,
456 				    u16 vport, bool spoofchk)
457 {
458 	struct mlx5_vport *evport = mlx5_eswitch_get_vport(esw, vport);
459 	bool pschk;
460 	int err = 0;
461 
462 	if (!mlx5_esw_allowed(esw))
463 		return -EPERM;
464 	if (IS_ERR(evport))
465 		return PTR_ERR(evport);
466 
467 	mutex_lock(&esw->state_lock);
468 	if (esw->mode != MLX5_ESWITCH_LEGACY) {
469 		err = -EOPNOTSUPP;
470 		goto unlock;
471 	}
472 	pschk = evport->info.spoofchk;
473 	evport->info.spoofchk = spoofchk;
474 	if (pschk && !is_valid_ether_addr(evport->info.mac))
475 		mlx5_core_warn(esw->dev,
476 			       "Spoofchk in set while MAC is invalid, vport(%d)\n",
477 			       evport->vport);
478 	if (evport->enabled && esw->mode == MLX5_ESWITCH_LEGACY)
479 		err = esw_acl_ingress_lgcy_setup(esw, evport);
480 	if (err)
481 		evport->info.spoofchk = pschk;
482 
483 unlock:
484 	mutex_unlock(&esw->state_lock);
485 	return err;
486 }
487 
mlx5_eswitch_set_vport_trust(struct mlx5_eswitch * esw,u16 vport,bool setting)488 int mlx5_eswitch_set_vport_trust(struct mlx5_eswitch *esw,
489 				 u16 vport, bool setting)
490 {
491 	struct mlx5_vport *evport = mlx5_eswitch_get_vport(esw, vport);
492 	int err = 0;
493 
494 	if (!mlx5_esw_allowed(esw))
495 		return -EPERM;
496 	if (IS_ERR(evport))
497 		return PTR_ERR(evport);
498 
499 	mutex_lock(&esw->state_lock);
500 	if (esw->mode != MLX5_ESWITCH_LEGACY) {
501 		err = -EOPNOTSUPP;
502 		goto unlock;
503 	}
504 	evport->info.trusted = setting;
505 	if (evport->enabled)
506 		esw_vport_change_handle_locked(evport);
507 
508 unlock:
509 	mutex_unlock(&esw->state_lock);
510 	return err;
511 }
512 
mlx5_eswitch_set_vport_rate(struct mlx5_eswitch * esw,u16 vport,u32 max_rate,u32 min_rate)513 int mlx5_eswitch_set_vport_rate(struct mlx5_eswitch *esw, u16 vport,
514 				u32 max_rate, u32 min_rate)
515 {
516 	struct mlx5_vport *evport = mlx5_eswitch_get_vport(esw, vport);
517 	int err;
518 
519 	if (!mlx5_esw_allowed(esw))
520 		return -EPERM;
521 	if (IS_ERR(evport))
522 		return PTR_ERR(evport);
523 
524 	mutex_lock(&esw->state_lock);
525 	err = mlx5_esw_qos_set_vport_min_rate(esw, evport, min_rate, NULL);
526 	if (!err)
527 		err = mlx5_esw_qos_set_vport_max_rate(esw, evport, max_rate, NULL);
528 	mutex_unlock(&esw->state_lock);
529 	return err;
530 }
531