1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (C) 2018-2021, Intel Corporation. */
3
4 /* Link Aggregation code */
5
6 #include "ice.h"
7 #include "ice_lib.h"
8 #include "ice_lag.h"
9
10 #define ICE_LAG_RES_SHARED BIT(14)
11 #define ICE_LAG_RES_VALID BIT(15)
12
13 #define LACP_TRAIN_PKT_LEN 16
14 static const u8 lacp_train_pkt[LACP_TRAIN_PKT_LEN] = { 0, 0, 0, 0, 0, 0,
15 0, 0, 0, 0, 0, 0,
16 0x88, 0x09, 0, 0 };
17
18 #define ICE_RECIPE_LEN 64
19 static const u8 ice_dflt_vsi_rcp[ICE_RECIPE_LEN] = {
20 0x05, 0, 0, 0, 0x20, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
21 0x85, 0, 0x01, 0, 0, 0, 0xff, 0xff, 0x08, 0, 0, 0, 0, 0, 0, 0,
22 0, 0, 0, 0, 0, 0, 0x30, 0, 0, 0, 0, 0, 0, 0, 0, 0,
23 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
24
25 /**
26 * ice_lag_set_primary - set PF LAG state as Primary
27 * @lag: LAG info struct
28 */
ice_lag_set_primary(struct ice_lag * lag)29 static void ice_lag_set_primary(struct ice_lag *lag)
30 {
31 struct ice_pf *pf = lag->pf;
32
33 if (!pf)
34 return;
35
36 if (lag->role != ICE_LAG_UNSET && lag->role != ICE_LAG_BACKUP) {
37 dev_warn(ice_pf_to_dev(pf), "%s: Attempt to be Primary, but incompatible state.\n",
38 netdev_name(lag->netdev));
39 return;
40 }
41
42 lag->role = ICE_LAG_PRIMARY;
43 }
44
45 /**
46 * ice_lag_set_backup - set PF LAG state to Backup
47 * @lag: LAG info struct
48 */
ice_lag_set_backup(struct ice_lag * lag)49 static void ice_lag_set_backup(struct ice_lag *lag)
50 {
51 struct ice_pf *pf = lag->pf;
52
53 if (!pf)
54 return;
55
56 if (lag->role != ICE_LAG_UNSET && lag->role != ICE_LAG_PRIMARY) {
57 dev_dbg(ice_pf_to_dev(pf), "%s: Attempt to be Backup, but incompatible state\n",
58 netdev_name(lag->netdev));
59 return;
60 }
61
62 lag->role = ICE_LAG_BACKUP;
63 }
64
65 /**
66 * netif_is_same_ice - determine if netdev is on the same ice NIC as local PF
67 * @pf: local PF struct
68 * @netdev: netdev we are evaluating
69 */
netif_is_same_ice(struct ice_pf * pf,struct net_device * netdev)70 static bool netif_is_same_ice(struct ice_pf *pf, struct net_device *netdev)
71 {
72 struct ice_netdev_priv *np;
73 struct ice_pf *test_pf;
74 struct ice_vsi *vsi;
75
76 if (!netif_is_ice(netdev))
77 return false;
78
79 np = netdev_priv(netdev);
80 if (!np)
81 return false;
82
83 vsi = np->vsi;
84 if (!vsi)
85 return false;
86
87 test_pf = vsi->back;
88 if (!test_pf)
89 return false;
90
91 if (pf->pdev->bus != test_pf->pdev->bus ||
92 pf->pdev->slot != test_pf->pdev->slot)
93 return false;
94
95 return true;
96 }
97
98 /**
99 * ice_netdev_to_lag - return pointer to associated lag struct from netdev
100 * @netdev: pointer to net_device struct to query
101 */
ice_netdev_to_lag(struct net_device * netdev)102 static struct ice_lag *ice_netdev_to_lag(struct net_device *netdev)
103 {
104 struct ice_netdev_priv *np;
105 struct ice_vsi *vsi;
106
107 if (!netif_is_ice(netdev))
108 return NULL;
109
110 np = netdev_priv(netdev);
111 if (!np)
112 return NULL;
113
114 vsi = np->vsi;
115 if (!vsi)
116 return NULL;
117
118 return vsi->back->lag;
119 }
120
121 /**
122 * ice_lag_find_hw_by_lport - return an hw struct from bond members lport
123 * @lag: lag struct
124 * @lport: lport value to search for
125 */
126 static struct ice_hw *
ice_lag_find_hw_by_lport(struct ice_lag * lag,u8 lport)127 ice_lag_find_hw_by_lport(struct ice_lag *lag, u8 lport)
128 {
129 struct ice_lag_netdev_list *entry;
130 struct net_device *tmp_netdev;
131 struct ice_netdev_priv *np;
132 struct ice_hw *hw;
133
134 list_for_each_entry(entry, lag->netdev_head, node) {
135 tmp_netdev = entry->netdev;
136 if (!tmp_netdev || !netif_is_ice(tmp_netdev))
137 continue;
138
139 np = netdev_priv(tmp_netdev);
140 if (!np || !np->vsi)
141 continue;
142
143 hw = &np->vsi->back->hw;
144 if (hw->port_info->lport == lport)
145 return hw;
146 }
147
148 return NULL;
149 }
150
151 /**
152 * ice_lag_find_primary - returns pointer to primary interfaces lag struct
153 * @lag: local interfaces lag struct
154 */
ice_lag_find_primary(struct ice_lag * lag)155 static struct ice_lag *ice_lag_find_primary(struct ice_lag *lag)
156 {
157 struct ice_lag *primary_lag = NULL;
158 struct list_head *tmp;
159
160 list_for_each(tmp, lag->netdev_head) {
161 struct ice_lag_netdev_list *entry;
162 struct ice_lag *tmp_lag;
163
164 entry = list_entry(tmp, struct ice_lag_netdev_list, node);
165 tmp_lag = ice_netdev_to_lag(entry->netdev);
166 if (tmp_lag && tmp_lag->primary) {
167 primary_lag = tmp_lag;
168 break;
169 }
170 }
171
172 return primary_lag;
173 }
174
175 /**
176 * ice_lag_cfg_dflt_fltr - Add/Remove default VSI rule for LAG
177 * @lag: lag struct for local interface
178 * @add: boolean on whether we are adding filters
179 */
180 static int
ice_lag_cfg_dflt_fltr(struct ice_lag * lag,bool add)181 ice_lag_cfg_dflt_fltr(struct ice_lag *lag, bool add)
182 {
183 struct ice_sw_rule_lkup_rx_tx *s_rule;
184 u16 s_rule_sz, vsi_num;
185 struct ice_hw *hw;
186 u32 act, opc;
187 u8 *eth_hdr;
188 int err;
189
190 hw = &lag->pf->hw;
191 vsi_num = ice_get_hw_vsi_num(hw, 0);
192
193 s_rule_sz = ICE_SW_RULE_RX_TX_ETH_HDR_SIZE(s_rule);
194 s_rule = kzalloc(s_rule_sz, GFP_KERNEL);
195 if (!s_rule) {
196 dev_err(ice_pf_to_dev(lag->pf), "error allocating rule for LAG default VSI\n");
197 return -ENOMEM;
198 }
199
200 if (add) {
201 eth_hdr = s_rule->hdr_data;
202 ice_fill_eth_hdr(eth_hdr);
203
204 act = (vsi_num << ICE_SINGLE_ACT_VSI_ID_S) &
205 ICE_SINGLE_ACT_VSI_ID_M;
206 act |= ICE_SINGLE_ACT_VSI_FORWARDING |
207 ICE_SINGLE_ACT_VALID_BIT | ICE_SINGLE_ACT_LAN_ENABLE;
208
209 s_rule->hdr.type = cpu_to_le16(ICE_AQC_SW_RULES_T_LKUP_RX);
210 s_rule->recipe_id = cpu_to_le16(lag->pf_recipe);
211 s_rule->src = cpu_to_le16(hw->port_info->lport);
212 s_rule->act = cpu_to_le32(act);
213 s_rule->hdr_len = cpu_to_le16(DUMMY_ETH_HDR_LEN);
214 opc = ice_aqc_opc_add_sw_rules;
215 } else {
216 s_rule->index = cpu_to_le16(lag->pf_rule_id);
217 opc = ice_aqc_opc_remove_sw_rules;
218 }
219
220 err = ice_aq_sw_rules(&lag->pf->hw, s_rule, s_rule_sz, 1, opc, NULL);
221 if (err)
222 goto dflt_fltr_free;
223
224 if (add)
225 lag->pf_rule_id = le16_to_cpu(s_rule->index);
226 else
227 lag->pf_rule_id = 0;
228
229 dflt_fltr_free:
230 kfree(s_rule);
231 return err;
232 }
233
234 /**
235 * ice_lag_cfg_pf_fltrs - set filters up for new active port
236 * @lag: local interfaces lag struct
237 * @ptr: opaque data containing notifier event
238 */
239 static void
ice_lag_cfg_pf_fltrs(struct ice_lag * lag,void * ptr)240 ice_lag_cfg_pf_fltrs(struct ice_lag *lag, void *ptr)
241 {
242 struct netdev_notifier_bonding_info *info;
243 struct netdev_bonding_info *bonding_info;
244 struct net_device *event_netdev;
245 struct device *dev;
246
247 event_netdev = netdev_notifier_info_to_dev(ptr);
248 /* not for this netdev */
249 if (event_netdev != lag->netdev)
250 return;
251
252 info = (struct netdev_notifier_bonding_info *)ptr;
253 bonding_info = &info->bonding_info;
254 dev = ice_pf_to_dev(lag->pf);
255
256 /* interface not active - remove old default VSI rule */
257 if (bonding_info->slave.state && lag->pf_rule_id) {
258 if (ice_lag_cfg_dflt_fltr(lag, false))
259 dev_err(dev, "Error removing old default VSI filter\n");
260 return;
261 }
262
263 /* interface becoming active - add new default VSI rule */
264 if (!bonding_info->slave.state && !lag->pf_rule_id)
265 if (ice_lag_cfg_dflt_fltr(lag, true))
266 dev_err(dev, "Error adding new default VSI filter\n");
267 }
268
269 /**
270 * ice_display_lag_info - print LAG info
271 * @lag: LAG info struct
272 */
ice_display_lag_info(struct ice_lag * lag)273 static void ice_display_lag_info(struct ice_lag *lag)
274 {
275 const char *name, *upper, *role, *bonded, *primary;
276 struct device *dev = &lag->pf->pdev->dev;
277
278 name = lag->netdev ? netdev_name(lag->netdev) : "unset";
279 upper = lag->upper_netdev ? netdev_name(lag->upper_netdev) : "unset";
280 primary = lag->primary ? "TRUE" : "FALSE";
281 bonded = lag->bonded ? "BONDED" : "UNBONDED";
282
283 switch (lag->role) {
284 case ICE_LAG_NONE:
285 role = "NONE";
286 break;
287 case ICE_LAG_PRIMARY:
288 role = "PRIMARY";
289 break;
290 case ICE_LAG_BACKUP:
291 role = "BACKUP";
292 break;
293 case ICE_LAG_UNSET:
294 role = "UNSET";
295 break;
296 default:
297 role = "ERROR";
298 }
299
300 dev_dbg(dev, "%s %s, upper:%s, role:%s, primary:%s\n", name, bonded,
301 upper, role, primary);
302 }
303
304 /**
305 * ice_lag_qbuf_recfg - generate a buffer of queues for a reconfigure command
306 * @hw: HW struct that contains the queue contexts
307 * @qbuf: pointer to buffer to populate
308 * @vsi_num: index of the VSI in PF space
309 * @numq: number of queues to search for
310 * @tc: traffic class that contains the queues
311 *
312 * function returns the number of valid queues in buffer
313 */
314 static u16
ice_lag_qbuf_recfg(struct ice_hw * hw,struct ice_aqc_cfg_txqs_buf * qbuf,u16 vsi_num,u16 numq,u8 tc)315 ice_lag_qbuf_recfg(struct ice_hw *hw, struct ice_aqc_cfg_txqs_buf *qbuf,
316 u16 vsi_num, u16 numq, u8 tc)
317 {
318 struct ice_q_ctx *q_ctx;
319 u16 qid, count = 0;
320 struct ice_pf *pf;
321 int i;
322
323 pf = hw->back;
324 for (i = 0; i < numq; i++) {
325 q_ctx = ice_get_lan_q_ctx(hw, vsi_num, tc, i);
326 if (!q_ctx) {
327 dev_dbg(ice_hw_to_dev(hw), "%s queue %d NO Q CONTEXT\n",
328 __func__, i);
329 continue;
330 }
331 if (q_ctx->q_teid == ICE_INVAL_TEID) {
332 dev_dbg(ice_hw_to_dev(hw), "%s queue %d INVAL TEID\n",
333 __func__, i);
334 continue;
335 }
336 if (q_ctx->q_handle == ICE_INVAL_Q_HANDLE) {
337 dev_dbg(ice_hw_to_dev(hw), "%s queue %d INVAL Q HANDLE\n",
338 __func__, i);
339 continue;
340 }
341
342 qid = pf->vsi[vsi_num]->txq_map[q_ctx->q_handle];
343 qbuf->queue_info[count].q_handle = cpu_to_le16(qid);
344 qbuf->queue_info[count].tc = tc;
345 qbuf->queue_info[count].q_teid = cpu_to_le32(q_ctx->q_teid);
346 count++;
347 }
348
349 return count;
350 }
351
352 /**
353 * ice_lag_get_sched_parent - locate or create a sched node parent
354 * @hw: HW struct for getting parent in
355 * @tc: traffic class on parent/node
356 */
357 static struct ice_sched_node *
ice_lag_get_sched_parent(struct ice_hw * hw,u8 tc)358 ice_lag_get_sched_parent(struct ice_hw *hw, u8 tc)
359 {
360 struct ice_sched_node *tc_node, *aggnode, *parent = NULL;
361 u16 num_nodes[ICE_AQC_TOPO_MAX_LEVEL_NUM] = { 0 };
362 struct ice_port_info *pi = hw->port_info;
363 struct device *dev;
364 u8 aggl, vsil;
365 int n;
366
367 dev = ice_hw_to_dev(hw);
368
369 tc_node = ice_sched_get_tc_node(pi, tc);
370 if (!tc_node) {
371 dev_warn(dev, "Failure to find TC node for LAG move\n");
372 return parent;
373 }
374
375 aggnode = ice_sched_get_agg_node(pi, tc_node, ICE_DFLT_AGG_ID);
376 if (!aggnode) {
377 dev_warn(dev, "Failure to find aggregate node for LAG move\n");
378 return parent;
379 }
380
381 aggl = ice_sched_get_agg_layer(hw);
382 vsil = ice_sched_get_vsi_layer(hw);
383
384 for (n = aggl + 1; n < vsil; n++)
385 num_nodes[n] = 1;
386
387 for (n = 0; n < aggnode->num_children; n++) {
388 parent = ice_sched_get_free_vsi_parent(hw, aggnode->children[n],
389 num_nodes);
390 if (parent)
391 return parent;
392 }
393
394 /* if free parent not found - add one */
395 parent = aggnode;
396 for (n = aggl + 1; n < vsil; n++) {
397 u16 num_nodes_added;
398 u32 first_teid;
399 int err;
400
401 err = ice_sched_add_nodes_to_layer(pi, tc_node, parent, n,
402 num_nodes[n], &first_teid,
403 &num_nodes_added);
404 if (err || num_nodes[n] != num_nodes_added)
405 return NULL;
406
407 if (num_nodes_added)
408 parent = ice_sched_find_node_by_teid(tc_node,
409 first_teid);
410 else
411 parent = parent->children[0];
412 if (!parent) {
413 dev_warn(dev, "Failure to add new parent for LAG move\n");
414 return parent;
415 }
416 }
417
418 return parent;
419 }
420
421 /**
422 * ice_lag_move_vf_node_tc - move scheduling nodes for one VF on one TC
423 * @lag: lag info struct
424 * @oldport: lport of previous nodes location
425 * @newport: lport of destination nodes location
426 * @vsi_num: array index of VSI in PF space
427 * @tc: traffic class to move
428 */
429 static void
ice_lag_move_vf_node_tc(struct ice_lag * lag,u8 oldport,u8 newport,u16 vsi_num,u8 tc)430 ice_lag_move_vf_node_tc(struct ice_lag *lag, u8 oldport, u8 newport,
431 u16 vsi_num, u8 tc)
432 {
433 u16 numq, valq, buf_size, num_moved, qbuf_size;
434 struct device *dev = ice_pf_to_dev(lag->pf);
435 struct ice_aqc_cfg_txqs_buf *qbuf;
436 struct ice_aqc_move_elem *buf;
437 struct ice_sched_node *n_prt;
438 struct ice_hw *new_hw = NULL;
439 __le32 teid, parent_teid;
440 struct ice_vsi_ctx *ctx;
441 u32 tmp_teid;
442
443 ctx = ice_get_vsi_ctx(&lag->pf->hw, vsi_num);
444 if (!ctx) {
445 dev_warn(dev, "Unable to locate VSI context for LAG failover\n");
446 return;
447 }
448
449 /* check to see if this VF is enabled on this TC */
450 if (!ctx->sched.vsi_node[tc])
451 return;
452
453 /* locate HW struct for destination port */
454 new_hw = ice_lag_find_hw_by_lport(lag, newport);
455 if (!new_hw) {
456 dev_warn(dev, "Unable to locate HW struct for LAG node destination\n");
457 return;
458 }
459
460 numq = ctx->num_lan_q_entries[tc];
461 teid = ctx->sched.vsi_node[tc]->info.node_teid;
462 tmp_teid = le32_to_cpu(teid);
463 parent_teid = ctx->sched.vsi_node[tc]->info.parent_teid;
464 /* if no teid assigned or numq == 0, then this TC is not active */
465 if (!tmp_teid || !numq)
466 return;
467
468 /* suspend VSI subtree for Traffic Class "tc" on
469 * this VF's VSI
470 */
471 if (ice_sched_suspend_resume_elems(&lag->pf->hw, 1, &tmp_teid, true))
472 dev_dbg(dev, "Problem suspending traffic for LAG node move\n");
473
474 /* reconfigure all VF's queues on this Traffic Class
475 * to new port
476 */
477 qbuf_size = struct_size(qbuf, queue_info, numq);
478 qbuf = kzalloc(qbuf_size, GFP_KERNEL);
479 if (!qbuf) {
480 dev_warn(dev, "Failure allocating memory for VF queue recfg buffer\n");
481 goto resume_traffic;
482 }
483
484 /* add the per queue info for the reconfigure command buffer */
485 valq = ice_lag_qbuf_recfg(&lag->pf->hw, qbuf, vsi_num, numq, tc);
486 if (!valq) {
487 dev_dbg(dev, "No valid queues found for LAG failover\n");
488 goto qbuf_none;
489 }
490
491 if (ice_aq_cfg_lan_txq(&lag->pf->hw, qbuf, qbuf_size, valq, oldport,
492 newport, NULL)) {
493 dev_warn(dev, "Failure to configure queues for LAG failover\n");
494 goto qbuf_err;
495 }
496
497 qbuf_none:
498 kfree(qbuf);
499
500 /* find new parent in destination port's tree for VF VSI node on this
501 * Traffic Class
502 */
503 n_prt = ice_lag_get_sched_parent(new_hw, tc);
504 if (!n_prt)
505 goto resume_traffic;
506
507 /* Move Vf's VSI node for this TC to newport's scheduler tree */
508 buf_size = struct_size(buf, teid, 1);
509 buf = kzalloc(buf_size, GFP_KERNEL);
510 if (!buf) {
511 dev_warn(dev, "Failure to alloc memory for VF node failover\n");
512 goto resume_traffic;
513 }
514
515 buf->hdr.src_parent_teid = parent_teid;
516 buf->hdr.dest_parent_teid = n_prt->info.node_teid;
517 buf->hdr.num_elems = cpu_to_le16(1);
518 buf->hdr.mode = ICE_AQC_MOVE_ELEM_MODE_KEEP_OWN;
519 buf->teid[0] = teid;
520
521 if (ice_aq_move_sched_elems(&lag->pf->hw, 1, buf, buf_size, &num_moved,
522 NULL))
523 dev_warn(dev, "Failure to move VF nodes for failover\n");
524 else
525 ice_sched_update_parent(n_prt, ctx->sched.vsi_node[tc]);
526
527 kfree(buf);
528 goto resume_traffic;
529
530 qbuf_err:
531 kfree(qbuf);
532
533 resume_traffic:
534 /* restart traffic for VSI node */
535 if (ice_sched_suspend_resume_elems(&lag->pf->hw, 1, &tmp_teid, false))
536 dev_dbg(dev, "Problem restarting traffic for LAG node move\n");
537 }
538
539 /**
540 * ice_lag_move_single_vf_nodes - Move Tx scheduling nodes for single VF
541 * @lag: primary interface LAG struct
542 * @oldport: lport of previous interface
543 * @newport: lport of destination interface
544 * @vsi_num: SW index of VF's VSI
545 */
546 static void
ice_lag_move_single_vf_nodes(struct ice_lag * lag,u8 oldport,u8 newport,u16 vsi_num)547 ice_lag_move_single_vf_nodes(struct ice_lag *lag, u8 oldport, u8 newport,
548 u16 vsi_num)
549 {
550 u8 tc;
551
552 ice_for_each_traffic_class(tc)
553 ice_lag_move_vf_node_tc(lag, oldport, newport, vsi_num, tc);
554 }
555
556 /**
557 * ice_lag_move_new_vf_nodes - Move Tx scheduling nodes for a VF if required
558 * @vf: the VF to move Tx nodes for
559 *
560 * Called just after configuring new VF queues. Check whether the VF Tx
561 * scheduling nodes need to be updated to fail over to the active port. If so,
562 * move them now.
563 */
ice_lag_move_new_vf_nodes(struct ice_vf * vf)564 void ice_lag_move_new_vf_nodes(struct ice_vf *vf)
565 {
566 struct ice_lag_netdev_list ndlist;
567 struct list_head *tmp, *n;
568 u8 pri_port, act_port;
569 struct ice_lag *lag;
570 struct ice_vsi *vsi;
571 struct ice_pf *pf;
572
573 vsi = ice_get_vf_vsi(vf);
574
575 if (WARN_ON(!vsi))
576 return;
577
578 if (WARN_ON(vsi->type != ICE_VSI_VF))
579 return;
580
581 pf = vf->pf;
582 lag = pf->lag;
583
584 mutex_lock(&pf->lag_mutex);
585 if (!lag->bonded)
586 goto new_vf_unlock;
587
588 pri_port = pf->hw.port_info->lport;
589 act_port = lag->active_port;
590
591 if (lag->upper_netdev) {
592 struct ice_lag_netdev_list *nl;
593 struct net_device *tmp_nd;
594
595 INIT_LIST_HEAD(&ndlist.node);
596 rcu_read_lock();
597 for_each_netdev_in_bond_rcu(lag->upper_netdev, tmp_nd) {
598 nl = kzalloc(sizeof(*nl), GFP_KERNEL);
599 if (!nl)
600 break;
601
602 nl->netdev = tmp_nd;
603 list_add(&nl->node, &ndlist.node);
604 }
605 rcu_read_unlock();
606 }
607
608 lag->netdev_head = &ndlist.node;
609
610 if (ice_is_feature_supported(pf, ICE_F_SRIOV_LAG) &&
611 lag->bonded && lag->primary && pri_port != act_port &&
612 !list_empty(lag->netdev_head))
613 ice_lag_move_single_vf_nodes(lag, pri_port, act_port, vsi->idx);
614
615 list_for_each_safe(tmp, n, &ndlist.node) {
616 struct ice_lag_netdev_list *entry;
617
618 entry = list_entry(tmp, struct ice_lag_netdev_list, node);
619 list_del(&entry->node);
620 kfree(entry);
621 }
622 lag->netdev_head = NULL;
623
624 new_vf_unlock:
625 mutex_unlock(&pf->lag_mutex);
626 }
627
628 /**
629 * ice_lag_move_vf_nodes - move Tx scheduling nodes for all VFs to new port
630 * @lag: lag info struct
631 * @oldport: lport of previous interface
632 * @newport: lport of destination interface
633 */
ice_lag_move_vf_nodes(struct ice_lag * lag,u8 oldport,u8 newport)634 static void ice_lag_move_vf_nodes(struct ice_lag *lag, u8 oldport, u8 newport)
635 {
636 struct ice_pf *pf;
637 int i;
638
639 if (!lag->primary)
640 return;
641
642 pf = lag->pf;
643 ice_for_each_vsi(pf, i)
644 if (pf->vsi[i] && (pf->vsi[i]->type == ICE_VSI_VF ||
645 pf->vsi[i]->type == ICE_VSI_SWITCHDEV_CTRL))
646 ice_lag_move_single_vf_nodes(lag, oldport, newport, i);
647 }
648
649 #define ICE_LAG_SRIOV_CP_RECIPE 10
650 #define ICE_LAG_SRIOV_TRAIN_PKT_LEN 16
651
652 /**
653 * ice_lag_cfg_cp_fltr - configure filter for control packets
654 * @lag: local interface's lag struct
655 * @add: add or remove rule
656 */
657 static void
ice_lag_cfg_cp_fltr(struct ice_lag * lag,bool add)658 ice_lag_cfg_cp_fltr(struct ice_lag *lag, bool add)
659 {
660 struct ice_sw_rule_lkup_rx_tx *s_rule = NULL;
661 struct ice_vsi *vsi;
662 u16 buf_len, opc;
663
664 vsi = lag->pf->vsi[0];
665
666 buf_len = ICE_SW_RULE_RX_TX_HDR_SIZE(s_rule,
667 ICE_LAG_SRIOV_TRAIN_PKT_LEN);
668 s_rule = kzalloc(buf_len, GFP_KERNEL);
669 if (!s_rule) {
670 netdev_warn(lag->netdev, "-ENOMEM error configuring CP filter\n");
671 return;
672 }
673
674 if (add) {
675 s_rule->hdr.type = cpu_to_le16(ICE_AQC_SW_RULES_T_LKUP_RX);
676 s_rule->recipe_id = cpu_to_le16(ICE_LAG_SRIOV_CP_RECIPE);
677 s_rule->src = cpu_to_le16(vsi->port_info->lport);
678 s_rule->act = cpu_to_le32(ICE_FWD_TO_VSI |
679 ICE_SINGLE_ACT_LAN_ENABLE |
680 ICE_SINGLE_ACT_VALID_BIT |
681 ((vsi->vsi_num <<
682 ICE_SINGLE_ACT_VSI_ID_S) &
683 ICE_SINGLE_ACT_VSI_ID_M));
684 s_rule->hdr_len = cpu_to_le16(ICE_LAG_SRIOV_TRAIN_PKT_LEN);
685 memcpy(s_rule->hdr_data, lacp_train_pkt, LACP_TRAIN_PKT_LEN);
686 opc = ice_aqc_opc_add_sw_rules;
687 } else {
688 opc = ice_aqc_opc_remove_sw_rules;
689 s_rule->index = cpu_to_le16(lag->cp_rule_idx);
690 }
691 if (ice_aq_sw_rules(&lag->pf->hw, s_rule, buf_len, 1, opc, NULL)) {
692 netdev_warn(lag->netdev, "Error %s CP rule for fail-over\n",
693 add ? "ADDING" : "REMOVING");
694 goto cp_free;
695 }
696
697 if (add)
698 lag->cp_rule_idx = le16_to_cpu(s_rule->index);
699 else
700 lag->cp_rule_idx = 0;
701
702 cp_free:
703 kfree(s_rule);
704 }
705
706 /**
707 * ice_lag_info_event - handle NETDEV_BONDING_INFO event
708 * @lag: LAG info struct
709 * @ptr: opaque data pointer
710 *
711 * ptr is to be cast to (netdev_notifier_bonding_info *)
712 */
ice_lag_info_event(struct ice_lag * lag,void * ptr)713 static void ice_lag_info_event(struct ice_lag *lag, void *ptr)
714 {
715 struct netdev_notifier_bonding_info *info;
716 struct netdev_bonding_info *bonding_info;
717 struct net_device *event_netdev;
718 const char *lag_netdev_name;
719
720 event_netdev = netdev_notifier_info_to_dev(ptr);
721 info = ptr;
722 lag_netdev_name = netdev_name(lag->netdev);
723 bonding_info = &info->bonding_info;
724
725 if (event_netdev != lag->netdev || !lag->bonded || !lag->upper_netdev)
726 return;
727
728 if (bonding_info->master.bond_mode != BOND_MODE_ACTIVEBACKUP) {
729 netdev_dbg(lag->netdev, "Bonding event recv, but mode not active/backup\n");
730 goto lag_out;
731 }
732
733 if (strcmp(bonding_info->slave.slave_name, lag_netdev_name)) {
734 netdev_dbg(lag->netdev, "Bonding event recv, but secondary info not for us\n");
735 goto lag_out;
736 }
737
738 if (bonding_info->slave.state)
739 ice_lag_set_backup(lag);
740 else
741 ice_lag_set_primary(lag);
742
743 lag_out:
744 ice_display_lag_info(lag);
745 }
746
747 /**
748 * ice_lag_reclaim_vf_tc - move scheduling nodes back to primary interface
749 * @lag: primary interface lag struct
750 * @src_hw: HW struct current node location
751 * @vsi_num: VSI index in PF space
752 * @tc: traffic class to move
753 */
754 static void
ice_lag_reclaim_vf_tc(struct ice_lag * lag,struct ice_hw * src_hw,u16 vsi_num,u8 tc)755 ice_lag_reclaim_vf_tc(struct ice_lag *lag, struct ice_hw *src_hw, u16 vsi_num,
756 u8 tc)
757 {
758 u16 numq, valq, buf_size, num_moved, qbuf_size;
759 struct device *dev = ice_pf_to_dev(lag->pf);
760 struct ice_aqc_cfg_txqs_buf *qbuf;
761 struct ice_aqc_move_elem *buf;
762 struct ice_sched_node *n_prt;
763 __le32 teid, parent_teid;
764 struct ice_vsi_ctx *ctx;
765 struct ice_hw *hw;
766 u32 tmp_teid;
767
768 hw = &lag->pf->hw;
769 ctx = ice_get_vsi_ctx(hw, vsi_num);
770 if (!ctx) {
771 dev_warn(dev, "Unable to locate VSI context for LAG reclaim\n");
772 return;
773 }
774
775 /* check to see if this VF is enabled on this TC */
776 if (!ctx->sched.vsi_node[tc])
777 return;
778
779 numq = ctx->num_lan_q_entries[tc];
780 teid = ctx->sched.vsi_node[tc]->info.node_teid;
781 tmp_teid = le32_to_cpu(teid);
782 parent_teid = ctx->sched.vsi_node[tc]->info.parent_teid;
783
784 /* if !teid or !numq, then this TC is not active */
785 if (!tmp_teid || !numq)
786 return;
787
788 /* suspend traffic */
789 if (ice_sched_suspend_resume_elems(hw, 1, &tmp_teid, true))
790 dev_dbg(dev, "Problem suspending traffic for LAG node move\n");
791
792 /* reconfig queues for new port */
793 qbuf_size = struct_size(qbuf, queue_info, numq);
794 qbuf = kzalloc(qbuf_size, GFP_KERNEL);
795 if (!qbuf) {
796 dev_warn(dev, "Failure allocating memory for VF queue recfg buffer\n");
797 goto resume_reclaim;
798 }
799
800 /* add the per queue info for the reconfigure command buffer */
801 valq = ice_lag_qbuf_recfg(hw, qbuf, vsi_num, numq, tc);
802 if (!valq) {
803 dev_dbg(dev, "No valid queues found for LAG reclaim\n");
804 goto reclaim_none;
805 }
806
807 if (ice_aq_cfg_lan_txq(hw, qbuf, qbuf_size, numq,
808 src_hw->port_info->lport, hw->port_info->lport,
809 NULL)) {
810 dev_warn(dev, "Failure to configure queues for LAG failover\n");
811 goto reclaim_qerr;
812 }
813
814 reclaim_none:
815 kfree(qbuf);
816
817 /* find parent in primary tree */
818 n_prt = ice_lag_get_sched_parent(hw, tc);
819 if (!n_prt)
820 goto resume_reclaim;
821
822 /* Move node to new parent */
823 buf_size = struct_size(buf, teid, 1);
824 buf = kzalloc(buf_size, GFP_KERNEL);
825 if (!buf) {
826 dev_warn(dev, "Failure to alloc memory for VF node failover\n");
827 goto resume_reclaim;
828 }
829
830 buf->hdr.src_parent_teid = parent_teid;
831 buf->hdr.dest_parent_teid = n_prt->info.node_teid;
832 buf->hdr.num_elems = cpu_to_le16(1);
833 buf->hdr.mode = ICE_AQC_MOVE_ELEM_MODE_KEEP_OWN;
834 buf->teid[0] = teid;
835
836 if (ice_aq_move_sched_elems(&lag->pf->hw, 1, buf, buf_size, &num_moved,
837 NULL))
838 dev_warn(dev, "Failure to move VF nodes for LAG reclaim\n");
839 else
840 ice_sched_update_parent(n_prt, ctx->sched.vsi_node[tc]);
841
842 kfree(buf);
843 goto resume_reclaim;
844
845 reclaim_qerr:
846 kfree(qbuf);
847
848 resume_reclaim:
849 /* restart traffic */
850 if (ice_sched_suspend_resume_elems(hw, 1, &tmp_teid, false))
851 dev_warn(dev, "Problem restarting traffic for LAG node reclaim\n");
852 }
853
854 /**
855 * ice_lag_reclaim_vf_nodes - When interface leaving bond primary reclaims nodes
856 * @lag: primary interface lag struct
857 * @src_hw: HW struct for current node location
858 */
859 static void
ice_lag_reclaim_vf_nodes(struct ice_lag * lag,struct ice_hw * src_hw)860 ice_lag_reclaim_vf_nodes(struct ice_lag *lag, struct ice_hw *src_hw)
861 {
862 struct ice_pf *pf;
863 int i, tc;
864
865 if (!lag->primary || !src_hw)
866 return;
867
868 pf = lag->pf;
869 ice_for_each_vsi(pf, i)
870 if (pf->vsi[i] && (pf->vsi[i]->type == ICE_VSI_VF ||
871 pf->vsi[i]->type == ICE_VSI_SWITCHDEV_CTRL))
872 ice_for_each_traffic_class(tc)
873 ice_lag_reclaim_vf_tc(lag, src_hw, i, tc);
874 }
875
876 /**
877 * ice_lag_link - handle LAG link event
878 * @lag: LAG info struct
879 */
ice_lag_link(struct ice_lag * lag)880 static void ice_lag_link(struct ice_lag *lag)
881 {
882 struct ice_pf *pf = lag->pf;
883
884 if (lag->bonded)
885 dev_warn(ice_pf_to_dev(pf), "%s Already part of a bond\n",
886 netdev_name(lag->netdev));
887
888 lag->bonded = true;
889 lag->role = ICE_LAG_UNSET;
890 netdev_info(lag->netdev, "Shared SR-IOV resources in bond are active\n");
891 }
892
893 /**
894 * ice_lag_unlink - handle unlink event
895 * @lag: LAG info struct
896 */
ice_lag_unlink(struct ice_lag * lag)897 static void ice_lag_unlink(struct ice_lag *lag)
898 {
899 u8 pri_port, act_port, loc_port;
900 struct ice_pf *pf = lag->pf;
901
902 if (!lag->bonded) {
903 netdev_dbg(lag->netdev, "bonding unlink event on non-LAG netdev\n");
904 return;
905 }
906
907 if (lag->primary) {
908 act_port = lag->active_port;
909 pri_port = lag->pf->hw.port_info->lport;
910 if (act_port != pri_port && act_port != ICE_LAG_INVALID_PORT)
911 ice_lag_move_vf_nodes(lag, act_port, pri_port);
912 lag->primary = false;
913 lag->active_port = ICE_LAG_INVALID_PORT;
914 } else {
915 struct ice_lag *primary_lag;
916
917 primary_lag = ice_lag_find_primary(lag);
918 if (primary_lag) {
919 act_port = primary_lag->active_port;
920 pri_port = primary_lag->pf->hw.port_info->lport;
921 loc_port = pf->hw.port_info->lport;
922 if (act_port == loc_port &&
923 act_port != ICE_LAG_INVALID_PORT) {
924 ice_lag_reclaim_vf_nodes(primary_lag,
925 &lag->pf->hw);
926 primary_lag->active_port = ICE_LAG_INVALID_PORT;
927 }
928 }
929 }
930
931 lag->bonded = false;
932 lag->role = ICE_LAG_NONE;
933 lag->upper_netdev = NULL;
934 }
935
936 /**
937 * ice_lag_link_unlink - helper function to call lag_link/unlink
938 * @lag: lag info struct
939 * @ptr: opaque pointer data
940 */
ice_lag_link_unlink(struct ice_lag * lag,void * ptr)941 static void ice_lag_link_unlink(struct ice_lag *lag, void *ptr)
942 {
943 struct net_device *netdev = netdev_notifier_info_to_dev(ptr);
944 struct netdev_notifier_changeupper_info *info = ptr;
945
946 if (netdev != lag->netdev)
947 return;
948
949 if (info->linking)
950 ice_lag_link(lag);
951 else
952 ice_lag_unlink(lag);
953 }
954
955 /**
956 * ice_lag_set_swid - set the SWID on secondary interface
957 * @primary_swid: primary interface's SWID
958 * @local_lag: local interfaces LAG struct
959 * @link: Is this a linking activity
960 *
961 * If link is false, then primary_swid should be expected to not be valid
962 * This function should never be called in interrupt context.
963 */
964 static void
ice_lag_set_swid(u16 primary_swid,struct ice_lag * local_lag,bool link)965 ice_lag_set_swid(u16 primary_swid, struct ice_lag *local_lag,
966 bool link)
967 {
968 struct ice_aqc_alloc_free_res_elem *buf;
969 struct ice_aqc_set_port_params *cmd;
970 struct ice_aq_desc desc;
971 u16 buf_len, swid;
972 int status, i;
973
974 buf_len = struct_size(buf, elem, 1);
975 buf = kzalloc(buf_len, GFP_KERNEL);
976 if (!buf) {
977 dev_err(ice_pf_to_dev(local_lag->pf), "-ENOMEM error setting SWID\n");
978 return;
979 }
980
981 buf->num_elems = cpu_to_le16(1);
982 buf->res_type = cpu_to_le16(ICE_AQC_RES_TYPE_SWID);
983 /* if unlinnking need to free the shared resource */
984 if (!link && local_lag->bond_swid) {
985 buf->elem[0].e.sw_resp = cpu_to_le16(local_lag->bond_swid);
986 status = ice_aq_alloc_free_res(&local_lag->pf->hw, buf,
987 buf_len, ice_aqc_opc_free_res);
988 if (status)
989 dev_err(ice_pf_to_dev(local_lag->pf), "Error freeing SWID during LAG unlink\n");
990 local_lag->bond_swid = 0;
991 }
992
993 if (link) {
994 buf->res_type |= cpu_to_le16(ICE_LAG_RES_SHARED |
995 ICE_LAG_RES_VALID);
996 /* store the primary's SWID in case it leaves bond first */
997 local_lag->bond_swid = primary_swid;
998 buf->elem[0].e.sw_resp = cpu_to_le16(local_lag->bond_swid);
999 } else {
1000 buf->elem[0].e.sw_resp =
1001 cpu_to_le16(local_lag->pf->hw.port_info->sw_id);
1002 }
1003
1004 status = ice_aq_alloc_free_res(&local_lag->pf->hw, buf, buf_len,
1005 ice_aqc_opc_alloc_res);
1006 if (status)
1007 dev_err(ice_pf_to_dev(local_lag->pf), "Error subscribing to SWID 0x%04X\n",
1008 local_lag->bond_swid);
1009
1010 kfree(buf);
1011
1012 /* Configure port param SWID to correct value */
1013 if (link)
1014 swid = primary_swid;
1015 else
1016 swid = local_lag->pf->hw.port_info->sw_id;
1017
1018 cmd = &desc.params.set_port_params;
1019 ice_fill_dflt_direct_cmd_desc(&desc, ice_aqc_opc_set_port_params);
1020
1021 cmd->swid = cpu_to_le16(ICE_AQC_PORT_SWID_VALID | swid);
1022 /* If this is happening in reset context, it is possible that the
1023 * primary interface has not finished setting its SWID to SHARED
1024 * yet. Allow retries to account for this timing issue between
1025 * interfaces.
1026 */
1027 for (i = 0; i < ICE_LAG_RESET_RETRIES; i++) {
1028 status = ice_aq_send_cmd(&local_lag->pf->hw, &desc, NULL, 0,
1029 NULL);
1030 if (!status)
1031 break;
1032
1033 usleep_range(1000, 2000);
1034 }
1035
1036 if (status)
1037 dev_err(ice_pf_to_dev(local_lag->pf), "Error setting SWID in port params %d\n",
1038 status);
1039 }
1040
1041 /**
1042 * ice_lag_primary_swid - set/clear the SHARED attrib of primary's SWID
1043 * @lag: primary interface's lag struct
1044 * @link: is this a linking activity
1045 *
1046 * Implement setting primary SWID as shared using 0x020B
1047 */
ice_lag_primary_swid(struct ice_lag * lag,bool link)1048 static void ice_lag_primary_swid(struct ice_lag *lag, bool link)
1049 {
1050 struct ice_hw *hw;
1051 u16 swid;
1052
1053 hw = &lag->pf->hw;
1054 swid = hw->port_info->sw_id;
1055
1056 if (ice_share_res(hw, ICE_AQC_RES_TYPE_SWID, link, swid))
1057 dev_warn(ice_pf_to_dev(lag->pf), "Failure to set primary interface shared status\n");
1058 }
1059
1060 /**
1061 * ice_lag_add_prune_list - Adds event_pf's VSI to primary's prune list
1062 * @lag: lag info struct
1063 * @event_pf: PF struct for VSI we are adding to primary's prune list
1064 */
ice_lag_add_prune_list(struct ice_lag * lag,struct ice_pf * event_pf)1065 static void ice_lag_add_prune_list(struct ice_lag *lag, struct ice_pf *event_pf)
1066 {
1067 u16 num_vsi, rule_buf_sz, vsi_list_id, event_vsi_num, prim_vsi_idx;
1068 struct ice_sw_rule_vsi_list *s_rule = NULL;
1069 struct device *dev;
1070
1071 num_vsi = 1;
1072
1073 dev = ice_pf_to_dev(lag->pf);
1074 event_vsi_num = event_pf->vsi[0]->vsi_num;
1075 prim_vsi_idx = lag->pf->vsi[0]->idx;
1076
1077 if (!ice_find_vsi_list_entry(&lag->pf->hw, ICE_SW_LKUP_VLAN,
1078 prim_vsi_idx, &vsi_list_id)) {
1079 dev_warn(dev, "Could not locate prune list when setting up SRIOV LAG\n");
1080 return;
1081 }
1082
1083 rule_buf_sz = (u16)ICE_SW_RULE_VSI_LIST_SIZE(s_rule, num_vsi);
1084 s_rule = kzalloc(rule_buf_sz, GFP_KERNEL);
1085 if (!s_rule) {
1086 dev_warn(dev, "Error allocating space for prune list when configuring SRIOV LAG\n");
1087 return;
1088 }
1089
1090 s_rule->hdr.type = cpu_to_le16(ICE_AQC_SW_RULES_T_PRUNE_LIST_SET);
1091 s_rule->index = cpu_to_le16(vsi_list_id);
1092 s_rule->number_vsi = cpu_to_le16(num_vsi);
1093 s_rule->vsi[0] = cpu_to_le16(event_vsi_num);
1094
1095 if (ice_aq_sw_rules(&event_pf->hw, s_rule, rule_buf_sz, 1,
1096 ice_aqc_opc_update_sw_rules, NULL))
1097 dev_warn(dev, "Error adding VSI prune list\n");
1098 kfree(s_rule);
1099 }
1100
1101 /**
1102 * ice_lag_del_prune_list - Remove secondary's vsi from primary's prune list
1103 * @lag: primary interface's ice_lag struct
1104 * @event_pf: PF struct for unlinking interface
1105 */
ice_lag_del_prune_list(struct ice_lag * lag,struct ice_pf * event_pf)1106 static void ice_lag_del_prune_list(struct ice_lag *lag, struct ice_pf *event_pf)
1107 {
1108 u16 num_vsi, vsi_num, vsi_idx, rule_buf_sz, vsi_list_id;
1109 struct ice_sw_rule_vsi_list *s_rule = NULL;
1110 struct device *dev;
1111
1112 num_vsi = 1;
1113
1114 dev = ice_pf_to_dev(lag->pf);
1115 vsi_num = event_pf->vsi[0]->vsi_num;
1116 vsi_idx = lag->pf->vsi[0]->idx;
1117
1118 if (!ice_find_vsi_list_entry(&lag->pf->hw, ICE_SW_LKUP_VLAN,
1119 vsi_idx, &vsi_list_id)) {
1120 dev_warn(dev, "Could not locate prune list when unwinding SRIOV LAG\n");
1121 return;
1122 }
1123
1124 rule_buf_sz = (u16)ICE_SW_RULE_VSI_LIST_SIZE(s_rule, num_vsi);
1125 s_rule = kzalloc(rule_buf_sz, GFP_KERNEL);
1126 if (!s_rule) {
1127 dev_warn(dev, "Error allocating prune list when unwinding SRIOV LAG\n");
1128 return;
1129 }
1130
1131 s_rule->hdr.type = cpu_to_le16(ICE_AQC_SW_RULES_T_PRUNE_LIST_CLEAR);
1132 s_rule->index = cpu_to_le16(vsi_list_id);
1133 s_rule->number_vsi = cpu_to_le16(num_vsi);
1134 s_rule->vsi[0] = cpu_to_le16(vsi_num);
1135
1136 if (ice_aq_sw_rules(&event_pf->hw, (struct ice_aqc_sw_rules *)s_rule,
1137 rule_buf_sz, 1, ice_aqc_opc_update_sw_rules, NULL))
1138 dev_warn(dev, "Error clearing VSI prune list\n");
1139
1140 kfree(s_rule);
1141 }
1142
1143 /**
1144 * ice_lag_init_feature_support_flag - Check for NVM support for LAG
1145 * @pf: PF struct
1146 */
ice_lag_init_feature_support_flag(struct ice_pf * pf)1147 static void ice_lag_init_feature_support_flag(struct ice_pf *pf)
1148 {
1149 struct ice_hw_common_caps *caps;
1150
1151 caps = &pf->hw.dev_caps.common_cap;
1152 if (caps->roce_lag)
1153 ice_set_feature_support(pf, ICE_F_ROCE_LAG);
1154 else
1155 ice_clear_feature_support(pf, ICE_F_ROCE_LAG);
1156
1157 if (caps->sriov_lag)
1158 ice_set_feature_support(pf, ICE_F_SRIOV_LAG);
1159 else
1160 ice_clear_feature_support(pf, ICE_F_SRIOV_LAG);
1161 }
1162
1163 /**
1164 * ice_lag_changeupper_event - handle LAG changeupper event
1165 * @lag: LAG info struct
1166 * @ptr: opaque pointer data
1167 */
ice_lag_changeupper_event(struct ice_lag * lag,void * ptr)1168 static void ice_lag_changeupper_event(struct ice_lag *lag, void *ptr)
1169 {
1170 struct netdev_notifier_changeupper_info *info;
1171 struct ice_lag *primary_lag;
1172 struct net_device *netdev;
1173
1174 info = ptr;
1175 netdev = netdev_notifier_info_to_dev(ptr);
1176
1177 /* not for this netdev */
1178 if (netdev != lag->netdev)
1179 return;
1180
1181 primary_lag = ice_lag_find_primary(lag);
1182 if (info->linking) {
1183 lag->upper_netdev = info->upper_dev;
1184 /* If there is not already a primary interface in the LAG,
1185 * then mark this one as primary.
1186 */
1187 if (!primary_lag) {
1188 lag->primary = true;
1189 /* Configure primary's SWID to be shared */
1190 ice_lag_primary_swid(lag, true);
1191 primary_lag = lag;
1192 } else {
1193 u16 swid;
1194
1195 swid = primary_lag->pf->hw.port_info->sw_id;
1196 ice_lag_set_swid(swid, lag, true);
1197 ice_lag_add_prune_list(primary_lag, lag->pf);
1198 }
1199 /* add filter for primary control packets */
1200 ice_lag_cfg_cp_fltr(lag, true);
1201 } else {
1202 if (!primary_lag && lag->primary)
1203 primary_lag = lag;
1204
1205 if (!lag->primary) {
1206 ice_lag_set_swid(0, lag, false);
1207 } else {
1208 if (primary_lag && lag->primary) {
1209 ice_lag_primary_swid(lag, false);
1210 ice_lag_del_prune_list(primary_lag, lag->pf);
1211 }
1212 }
1213 /* remove filter for control packets */
1214 ice_lag_cfg_cp_fltr(lag, false);
1215 }
1216 }
1217
1218 /**
1219 * ice_lag_monitor_link - monitor interfaces entering/leaving the aggregate
1220 * @lag: lag info struct
1221 * @ptr: opaque data containing notifier event
1222 *
1223 * This function only operates after a primary has been set.
1224 */
ice_lag_monitor_link(struct ice_lag * lag,void * ptr)1225 static void ice_lag_monitor_link(struct ice_lag *lag, void *ptr)
1226 {
1227 struct netdev_notifier_changeupper_info *info;
1228 struct ice_hw *prim_hw, *active_hw;
1229 struct net_device *event_netdev;
1230 struct ice_pf *pf;
1231 u8 prim_port;
1232
1233 if (!lag->primary)
1234 return;
1235
1236 event_netdev = netdev_notifier_info_to_dev(ptr);
1237 if (!netif_is_same_ice(lag->pf, event_netdev))
1238 return;
1239
1240 pf = lag->pf;
1241 prim_hw = &pf->hw;
1242 prim_port = prim_hw->port_info->lport;
1243
1244 info = (struct netdev_notifier_changeupper_info *)ptr;
1245 if (info->upper_dev != lag->upper_netdev)
1246 return;
1247
1248 if (!info->linking) {
1249 /* Since there are only two interfaces allowed in SRIOV+LAG, if
1250 * one port is leaving, then nodes need to be on primary
1251 * interface.
1252 */
1253 if (prim_port != lag->active_port &&
1254 lag->active_port != ICE_LAG_INVALID_PORT) {
1255 active_hw = ice_lag_find_hw_by_lport(lag,
1256 lag->active_port);
1257 ice_lag_reclaim_vf_nodes(lag, active_hw);
1258 lag->active_port = ICE_LAG_INVALID_PORT;
1259 }
1260 }
1261 }
1262
1263 /**
1264 * ice_lag_monitor_active - main PF keep track of which port is active
1265 * @lag: lag info struct
1266 * @ptr: opaque data containing notifier event
1267 *
1268 * This function is for the primary PF to monitor changes in which port is
1269 * active and handle changes for SRIOV VF functionality
1270 */
ice_lag_monitor_active(struct ice_lag * lag,void * ptr)1271 static void ice_lag_monitor_active(struct ice_lag *lag, void *ptr)
1272 {
1273 struct net_device *event_netdev, *event_upper;
1274 struct netdev_notifier_bonding_info *info;
1275 struct netdev_bonding_info *bonding_info;
1276 struct ice_netdev_priv *event_np;
1277 struct ice_pf *pf, *event_pf;
1278 u8 prim_port, event_port;
1279
1280 if (!lag->primary)
1281 return;
1282
1283 pf = lag->pf;
1284 if (!pf)
1285 return;
1286
1287 event_netdev = netdev_notifier_info_to_dev(ptr);
1288 rcu_read_lock();
1289 event_upper = netdev_master_upper_dev_get_rcu(event_netdev);
1290 rcu_read_unlock();
1291 if (!netif_is_ice(event_netdev) || event_upper != lag->upper_netdev)
1292 return;
1293
1294 event_np = netdev_priv(event_netdev);
1295 event_pf = event_np->vsi->back;
1296 event_port = event_pf->hw.port_info->lport;
1297 prim_port = pf->hw.port_info->lport;
1298
1299 info = (struct netdev_notifier_bonding_info *)ptr;
1300 bonding_info = &info->bonding_info;
1301
1302 if (!bonding_info->slave.state) {
1303 /* if no port is currently active, then nodes and filters exist
1304 * on primary port, check if we need to move them
1305 */
1306 if (lag->active_port == ICE_LAG_INVALID_PORT) {
1307 if (event_port != prim_port)
1308 ice_lag_move_vf_nodes(lag, prim_port,
1309 event_port);
1310 lag->active_port = event_port;
1311 return;
1312 }
1313
1314 /* active port is already set and is current event port */
1315 if (lag->active_port == event_port)
1316 return;
1317 /* new active port */
1318 ice_lag_move_vf_nodes(lag, lag->active_port, event_port);
1319 lag->active_port = event_port;
1320 } else {
1321 /* port not set as currently active (e.g. new active port
1322 * has already claimed the nodes and filters
1323 */
1324 if (lag->active_port != event_port)
1325 return;
1326 /* This is the case when neither port is active (both link down)
1327 * Link down on the bond - set active port to invalid and move
1328 * nodes and filters back to primary if not already there
1329 */
1330 if (event_port != prim_port)
1331 ice_lag_move_vf_nodes(lag, event_port, prim_port);
1332 lag->active_port = ICE_LAG_INVALID_PORT;
1333 }
1334 }
1335
1336 /**
1337 * ice_lag_chk_comp - evaluate bonded interface for feature support
1338 * @lag: lag info struct
1339 * @ptr: opaque data for netdev event info
1340 */
1341 static bool
ice_lag_chk_comp(struct ice_lag * lag,void * ptr)1342 ice_lag_chk_comp(struct ice_lag *lag, void *ptr)
1343 {
1344 struct net_device *event_netdev, *event_upper;
1345 struct netdev_notifier_bonding_info *info;
1346 struct netdev_bonding_info *bonding_info;
1347 struct list_head *tmp;
1348 struct device *dev;
1349 int count = 0;
1350
1351 if (!lag->primary)
1352 return true;
1353
1354 event_netdev = netdev_notifier_info_to_dev(ptr);
1355 rcu_read_lock();
1356 event_upper = netdev_master_upper_dev_get_rcu(event_netdev);
1357 rcu_read_unlock();
1358 if (event_upper != lag->upper_netdev)
1359 return true;
1360
1361 dev = ice_pf_to_dev(lag->pf);
1362
1363 /* only supporting switchdev mode for SRIOV VF LAG.
1364 * primary interface has to be in switchdev mode
1365 */
1366 if (!ice_is_switchdev_running(lag->pf)) {
1367 dev_info(dev, "Primary interface not in switchdev mode - VF LAG disabled\n");
1368 return false;
1369 }
1370
1371 info = (struct netdev_notifier_bonding_info *)ptr;
1372 bonding_info = &info->bonding_info;
1373 lag->bond_mode = bonding_info->master.bond_mode;
1374 if (lag->bond_mode != BOND_MODE_ACTIVEBACKUP) {
1375 dev_info(dev, "Bond Mode not ACTIVE-BACKUP - VF LAG disabled\n");
1376 return false;
1377 }
1378
1379 list_for_each(tmp, lag->netdev_head) {
1380 struct ice_dcbx_cfg *dcb_cfg, *peer_dcb_cfg;
1381 struct ice_lag_netdev_list *entry;
1382 struct ice_netdev_priv *peer_np;
1383 struct net_device *peer_netdev;
1384 struct ice_vsi *vsi, *peer_vsi;
1385 struct ice_pf *peer_pf;
1386
1387 entry = list_entry(tmp, struct ice_lag_netdev_list, node);
1388 peer_netdev = entry->netdev;
1389 if (!netif_is_ice(peer_netdev)) {
1390 dev_info(dev, "Found %s non-ice netdev in LAG - VF LAG disabled\n",
1391 netdev_name(peer_netdev));
1392 return false;
1393 }
1394
1395 count++;
1396 if (count > 2) {
1397 dev_info(dev, "Found more than two netdevs in LAG - VF LAG disabled\n");
1398 return false;
1399 }
1400
1401 peer_np = netdev_priv(peer_netdev);
1402 vsi = ice_get_main_vsi(lag->pf);
1403 peer_vsi = peer_np->vsi;
1404 if (lag->pf->pdev->bus != peer_vsi->back->pdev->bus ||
1405 lag->pf->pdev->slot != peer_vsi->back->pdev->slot) {
1406 dev_info(dev, "Found %s on different device in LAG - VF LAG disabled\n",
1407 netdev_name(peer_netdev));
1408 return false;
1409 }
1410
1411 dcb_cfg = &vsi->port_info->qos_cfg.local_dcbx_cfg;
1412 peer_dcb_cfg = &peer_vsi->port_info->qos_cfg.local_dcbx_cfg;
1413 if (memcmp(dcb_cfg, peer_dcb_cfg,
1414 sizeof(struct ice_dcbx_cfg))) {
1415 dev_info(dev, "Found %s with different DCB in LAG - VF LAG disabled\n",
1416 netdev_name(peer_netdev));
1417 return false;
1418 }
1419
1420 peer_pf = peer_vsi->back;
1421 if (test_bit(ICE_FLAG_FW_LLDP_AGENT, peer_pf->flags)) {
1422 dev_warn(dev, "Found %s with FW LLDP agent active - VF LAG disabled\n",
1423 netdev_name(peer_netdev));
1424 return false;
1425 }
1426 }
1427
1428 return true;
1429 }
1430
1431 /**
1432 * ice_lag_unregister - handle netdev unregister events
1433 * @lag: LAG info struct
1434 * @event_netdev: netdev struct for target of notifier event
1435 */
1436 static void
ice_lag_unregister(struct ice_lag * lag,struct net_device * event_netdev)1437 ice_lag_unregister(struct ice_lag *lag, struct net_device *event_netdev)
1438 {
1439 struct ice_netdev_priv *np;
1440 struct ice_pf *event_pf;
1441 struct ice_lag *p_lag;
1442
1443 p_lag = ice_lag_find_primary(lag);
1444 np = netdev_priv(event_netdev);
1445 event_pf = np->vsi->back;
1446
1447 if (p_lag) {
1448 if (p_lag->active_port != p_lag->pf->hw.port_info->lport &&
1449 p_lag->active_port != ICE_LAG_INVALID_PORT) {
1450 struct ice_hw *active_hw;
1451
1452 active_hw = ice_lag_find_hw_by_lport(lag,
1453 p_lag->active_port);
1454 if (active_hw)
1455 ice_lag_reclaim_vf_nodes(p_lag, active_hw);
1456 lag->active_port = ICE_LAG_INVALID_PORT;
1457 }
1458 }
1459
1460 /* primary processing for primary */
1461 if (lag->primary && lag->netdev == event_netdev)
1462 ice_lag_primary_swid(lag, false);
1463
1464 /* primary processing for secondary */
1465 if (lag->primary && lag->netdev != event_netdev)
1466 ice_lag_del_prune_list(lag, event_pf);
1467
1468 /* secondary processing for secondary */
1469 if (!lag->primary && lag->netdev == event_netdev)
1470 ice_lag_set_swid(0, lag, false);
1471 }
1472
1473 /**
1474 * ice_lag_monitor_rdma - set and clear rdma functionality
1475 * @lag: pointer to lag struct
1476 * @ptr: opaque data for netdev event info
1477 */
1478 static void
ice_lag_monitor_rdma(struct ice_lag * lag,void * ptr)1479 ice_lag_monitor_rdma(struct ice_lag *lag, void *ptr)
1480 {
1481 struct netdev_notifier_changeupper_info *info;
1482 struct net_device *netdev;
1483
1484 info = ptr;
1485 netdev = netdev_notifier_info_to_dev(ptr);
1486
1487 if (netdev != lag->netdev)
1488 return;
1489
1490 if (info->linking)
1491 ice_clear_rdma_cap(lag->pf);
1492 else
1493 ice_set_rdma_cap(lag->pf);
1494 }
1495
1496 /**
1497 * ice_lag_chk_disabled_bond - monitor interfaces entering/leaving disabled bond
1498 * @lag: lag info struct
1499 * @ptr: opaque data containing event
1500 *
1501 * as interfaces enter a bond - determine if the bond is currently
1502 * SRIOV LAG compliant and flag if not. As interfaces leave the
1503 * bond, reset their compliant status.
1504 */
ice_lag_chk_disabled_bond(struct ice_lag * lag,void * ptr)1505 static void ice_lag_chk_disabled_bond(struct ice_lag *lag, void *ptr)
1506 {
1507 struct net_device *netdev = netdev_notifier_info_to_dev(ptr);
1508 struct netdev_notifier_changeupper_info *info = ptr;
1509 struct ice_lag *prim_lag;
1510
1511 if (netdev != lag->netdev)
1512 return;
1513
1514 if (info->linking) {
1515 prim_lag = ice_lag_find_primary(lag);
1516 if (prim_lag &&
1517 !ice_is_feature_supported(prim_lag->pf, ICE_F_SRIOV_LAG)) {
1518 ice_clear_feature_support(lag->pf, ICE_F_SRIOV_LAG);
1519 netdev_info(netdev, "Interface added to non-compliant SRIOV LAG aggregate\n");
1520 }
1521 } else {
1522 ice_lag_init_feature_support_flag(lag->pf);
1523 }
1524 }
1525
1526 /**
1527 * ice_lag_disable_sriov_bond - set members of bond as not supporting SRIOV LAG
1528 * @lag: primary interfaces lag struct
1529 */
ice_lag_disable_sriov_bond(struct ice_lag * lag)1530 static void ice_lag_disable_sriov_bond(struct ice_lag *lag)
1531 {
1532 struct ice_lag_netdev_list *entry;
1533 struct ice_netdev_priv *np;
1534 struct net_device *netdev;
1535 struct ice_pf *pf;
1536
1537 list_for_each_entry(entry, lag->netdev_head, node) {
1538 netdev = entry->netdev;
1539 np = netdev_priv(netdev);
1540 pf = np->vsi->back;
1541
1542 ice_clear_feature_support(pf, ICE_F_SRIOV_LAG);
1543 }
1544 }
1545
1546 /**
1547 * ice_lag_process_event - process a task assigned to the lag_wq
1548 * @work: pointer to work_struct
1549 */
ice_lag_process_event(struct work_struct * work)1550 static void ice_lag_process_event(struct work_struct *work)
1551 {
1552 struct netdev_notifier_changeupper_info *info;
1553 struct ice_lag_work *lag_work;
1554 struct net_device *netdev;
1555 struct list_head *tmp, *n;
1556 struct ice_pf *pf;
1557
1558 lag_work = container_of(work, struct ice_lag_work, lag_task);
1559 pf = lag_work->lag->pf;
1560
1561 mutex_lock(&pf->lag_mutex);
1562 lag_work->lag->netdev_head = &lag_work->netdev_list.node;
1563
1564 switch (lag_work->event) {
1565 case NETDEV_CHANGEUPPER:
1566 info = &lag_work->info.changeupper_info;
1567 ice_lag_chk_disabled_bond(lag_work->lag, info);
1568 if (ice_is_feature_supported(pf, ICE_F_SRIOV_LAG)) {
1569 ice_lag_monitor_link(lag_work->lag, info);
1570 ice_lag_changeupper_event(lag_work->lag, info);
1571 ice_lag_link_unlink(lag_work->lag, info);
1572 }
1573 ice_lag_monitor_rdma(lag_work->lag, info);
1574 break;
1575 case NETDEV_BONDING_INFO:
1576 if (ice_is_feature_supported(pf, ICE_F_SRIOV_LAG)) {
1577 if (!ice_lag_chk_comp(lag_work->lag,
1578 &lag_work->info.bonding_info)) {
1579 netdev = lag_work->info.bonding_info.info.dev;
1580 ice_lag_disable_sriov_bond(lag_work->lag);
1581 ice_lag_unregister(lag_work->lag, netdev);
1582 goto lag_cleanup;
1583 }
1584 ice_lag_monitor_active(lag_work->lag,
1585 &lag_work->info.bonding_info);
1586 ice_lag_cfg_pf_fltrs(lag_work->lag,
1587 &lag_work->info.bonding_info);
1588 }
1589 ice_lag_info_event(lag_work->lag, &lag_work->info.bonding_info);
1590 break;
1591 case NETDEV_UNREGISTER:
1592 if (ice_is_feature_supported(pf, ICE_F_SRIOV_LAG)) {
1593 netdev = lag_work->info.bonding_info.info.dev;
1594 if ((netdev == lag_work->lag->netdev ||
1595 lag_work->lag->primary) && lag_work->lag->bonded)
1596 ice_lag_unregister(lag_work->lag, netdev);
1597 }
1598 break;
1599 default:
1600 break;
1601 }
1602
1603 lag_cleanup:
1604 /* cleanup resources allocated for this work item */
1605 list_for_each_safe(tmp, n, &lag_work->netdev_list.node) {
1606 struct ice_lag_netdev_list *entry;
1607
1608 entry = list_entry(tmp, struct ice_lag_netdev_list, node);
1609 list_del(&entry->node);
1610 kfree(entry);
1611 }
1612 lag_work->lag->netdev_head = NULL;
1613
1614 mutex_unlock(&pf->lag_mutex);
1615
1616 kfree(lag_work);
1617 }
1618
1619 /**
1620 * ice_lag_event_handler - handle LAG events from netdev
1621 * @notif_blk: notifier block registered by this netdev
1622 * @event: event type
1623 * @ptr: opaque data containing notifier event
1624 */
1625 static int
ice_lag_event_handler(struct notifier_block * notif_blk,unsigned long event,void * ptr)1626 ice_lag_event_handler(struct notifier_block *notif_blk, unsigned long event,
1627 void *ptr)
1628 {
1629 struct net_device *netdev = netdev_notifier_info_to_dev(ptr);
1630 struct net_device *upper_netdev;
1631 struct ice_lag_work *lag_work;
1632 struct ice_lag *lag;
1633
1634 if (!netif_is_ice(netdev))
1635 return NOTIFY_DONE;
1636
1637 if (event != NETDEV_CHANGEUPPER && event != NETDEV_BONDING_INFO &&
1638 event != NETDEV_UNREGISTER)
1639 return NOTIFY_DONE;
1640
1641 if (!(netdev->priv_flags & IFF_BONDING))
1642 return NOTIFY_DONE;
1643
1644 lag = container_of(notif_blk, struct ice_lag, notif_block);
1645 if (!lag->netdev)
1646 return NOTIFY_DONE;
1647
1648 if (!net_eq(dev_net(netdev), &init_net))
1649 return NOTIFY_DONE;
1650
1651 /* This memory will be freed at the end of ice_lag_process_event */
1652 lag_work = kzalloc(sizeof(*lag_work), GFP_KERNEL);
1653 if (!lag_work)
1654 return -ENOMEM;
1655
1656 lag_work->event_netdev = netdev;
1657 lag_work->lag = lag;
1658 lag_work->event = event;
1659 if (event == NETDEV_CHANGEUPPER) {
1660 struct netdev_notifier_changeupper_info *info;
1661
1662 info = ptr;
1663 upper_netdev = info->upper_dev;
1664 } else {
1665 upper_netdev = netdev_master_upper_dev_get(netdev);
1666 }
1667
1668 INIT_LIST_HEAD(&lag_work->netdev_list.node);
1669 if (upper_netdev) {
1670 struct ice_lag_netdev_list *nd_list;
1671 struct net_device *tmp_nd;
1672
1673 rcu_read_lock();
1674 for_each_netdev_in_bond_rcu(upper_netdev, tmp_nd) {
1675 nd_list = kzalloc(sizeof(*nd_list), GFP_KERNEL);
1676 if (!nd_list)
1677 break;
1678
1679 nd_list->netdev = tmp_nd;
1680 list_add(&nd_list->node, &lag_work->netdev_list.node);
1681 }
1682 rcu_read_unlock();
1683 }
1684
1685 switch (event) {
1686 case NETDEV_CHANGEUPPER:
1687 lag_work->info.changeupper_info =
1688 *((struct netdev_notifier_changeupper_info *)ptr);
1689 break;
1690 case NETDEV_BONDING_INFO:
1691 lag_work->info.bonding_info =
1692 *((struct netdev_notifier_bonding_info *)ptr);
1693 break;
1694 default:
1695 lag_work->info.notifier_info =
1696 *((struct netdev_notifier_info *)ptr);
1697 break;
1698 }
1699
1700 INIT_WORK(&lag_work->lag_task, ice_lag_process_event);
1701 queue_work(ice_lag_wq, &lag_work->lag_task);
1702
1703 return NOTIFY_DONE;
1704 }
1705
1706 /**
1707 * ice_register_lag_handler - register LAG handler on netdev
1708 * @lag: LAG struct
1709 */
ice_register_lag_handler(struct ice_lag * lag)1710 static int ice_register_lag_handler(struct ice_lag *lag)
1711 {
1712 struct device *dev = ice_pf_to_dev(lag->pf);
1713 struct notifier_block *notif_blk;
1714
1715 notif_blk = &lag->notif_block;
1716
1717 if (!notif_blk->notifier_call) {
1718 notif_blk->notifier_call = ice_lag_event_handler;
1719 if (register_netdevice_notifier(notif_blk)) {
1720 notif_blk->notifier_call = NULL;
1721 dev_err(dev, "FAIL register LAG event handler!\n");
1722 return -EINVAL;
1723 }
1724 dev_dbg(dev, "LAG event handler registered\n");
1725 }
1726 return 0;
1727 }
1728
1729 /**
1730 * ice_unregister_lag_handler - unregister LAG handler on netdev
1731 * @lag: LAG struct
1732 */
ice_unregister_lag_handler(struct ice_lag * lag)1733 static void ice_unregister_lag_handler(struct ice_lag *lag)
1734 {
1735 struct device *dev = ice_pf_to_dev(lag->pf);
1736 struct notifier_block *notif_blk;
1737
1738 notif_blk = &lag->notif_block;
1739 if (notif_blk->notifier_call) {
1740 unregister_netdevice_notifier(notif_blk);
1741 dev_dbg(dev, "LAG event handler unregistered\n");
1742 }
1743 }
1744
1745 /**
1746 * ice_create_lag_recipe
1747 * @hw: pointer to HW struct
1748 * @rid: pointer to u16 to pass back recipe index
1749 * @base_recipe: recipe to base the new recipe on
1750 * @prio: priority for new recipe
1751 *
1752 * function returns 0 on error
1753 */
ice_create_lag_recipe(struct ice_hw * hw,u16 * rid,const u8 * base_recipe,u8 prio)1754 static int ice_create_lag_recipe(struct ice_hw *hw, u16 *rid,
1755 const u8 *base_recipe, u8 prio)
1756 {
1757 struct ice_aqc_recipe_data_elem *new_rcp;
1758 int err;
1759
1760 err = ice_alloc_recipe(hw, rid);
1761 if (err)
1762 return err;
1763
1764 new_rcp = kzalloc(ICE_RECIPE_LEN * ICE_MAX_NUM_RECIPES, GFP_KERNEL);
1765 if (!new_rcp)
1766 return -ENOMEM;
1767
1768 memcpy(new_rcp, base_recipe, ICE_RECIPE_LEN);
1769 new_rcp->content.act_ctrl_fwd_priority = prio;
1770 new_rcp->content.rid = *rid | ICE_AQ_RECIPE_ID_IS_ROOT;
1771 new_rcp->recipe_indx = *rid;
1772 bitmap_zero((unsigned long *)new_rcp->recipe_bitmap,
1773 ICE_MAX_NUM_RECIPES);
1774 set_bit(*rid, (unsigned long *)new_rcp->recipe_bitmap);
1775
1776 err = ice_aq_add_recipe(hw, new_rcp, 1, NULL);
1777 if (err)
1778 *rid = 0;
1779
1780 kfree(new_rcp);
1781 return err;
1782 }
1783
1784 /**
1785 * ice_lag_move_vf_nodes_tc_sync - move a VF's nodes for a tc during reset
1786 * @lag: primary interfaces lag struct
1787 * @dest_hw: HW struct for destination's interface
1788 * @vsi_num: VSI index in PF space
1789 * @tc: traffic class to move
1790 */
1791 static void
ice_lag_move_vf_nodes_tc_sync(struct ice_lag * lag,struct ice_hw * dest_hw,u16 vsi_num,u8 tc)1792 ice_lag_move_vf_nodes_tc_sync(struct ice_lag *lag, struct ice_hw *dest_hw,
1793 u16 vsi_num, u8 tc)
1794 {
1795 u16 numq, valq, buf_size, num_moved, qbuf_size;
1796 struct device *dev = ice_pf_to_dev(lag->pf);
1797 struct ice_aqc_cfg_txqs_buf *qbuf;
1798 struct ice_aqc_move_elem *buf;
1799 struct ice_sched_node *n_prt;
1800 __le32 teid, parent_teid;
1801 struct ice_vsi_ctx *ctx;
1802 struct ice_hw *hw;
1803 u32 tmp_teid;
1804
1805 hw = &lag->pf->hw;
1806 ctx = ice_get_vsi_ctx(hw, vsi_num);
1807 if (!ctx) {
1808 dev_warn(dev, "LAG rebuild failed after reset due to VSI Context failure\n");
1809 return;
1810 }
1811
1812 if (!ctx->sched.vsi_node[tc])
1813 return;
1814
1815 numq = ctx->num_lan_q_entries[tc];
1816 teid = ctx->sched.vsi_node[tc]->info.node_teid;
1817 tmp_teid = le32_to_cpu(teid);
1818 parent_teid = ctx->sched.vsi_node[tc]->info.parent_teid;
1819
1820 if (!tmp_teid || !numq)
1821 return;
1822
1823 if (ice_sched_suspend_resume_elems(hw, 1, &tmp_teid, true))
1824 dev_dbg(dev, "Problem suspending traffic during reset rebuild\n");
1825
1826 /* reconfig queues for new port */
1827 qbuf_size = struct_size(qbuf, queue_info, numq);
1828 qbuf = kzalloc(qbuf_size, GFP_KERNEL);
1829 if (!qbuf) {
1830 dev_warn(dev, "Failure allocating VF queue recfg buffer for reset rebuild\n");
1831 goto resume_sync;
1832 }
1833
1834 /* add the per queue info for the reconfigure command buffer */
1835 valq = ice_lag_qbuf_recfg(hw, qbuf, vsi_num, numq, tc);
1836 if (!valq) {
1837 dev_warn(dev, "Failure to reconfig queues for LAG reset rebuild\n");
1838 goto sync_none;
1839 }
1840
1841 if (ice_aq_cfg_lan_txq(hw, qbuf, qbuf_size, numq, hw->port_info->lport,
1842 dest_hw->port_info->lport, NULL)) {
1843 dev_warn(dev, "Failure to configure queues for LAG reset rebuild\n");
1844 goto sync_qerr;
1845 }
1846
1847 sync_none:
1848 kfree(qbuf);
1849
1850 /* find parent in destination tree */
1851 n_prt = ice_lag_get_sched_parent(dest_hw, tc);
1852 if (!n_prt)
1853 goto resume_sync;
1854
1855 /* Move node to new parent */
1856 buf_size = struct_size(buf, teid, 1);
1857 buf = kzalloc(buf_size, GFP_KERNEL);
1858 if (!buf) {
1859 dev_warn(dev, "Failure to alloc for VF node move in reset rebuild\n");
1860 goto resume_sync;
1861 }
1862
1863 buf->hdr.src_parent_teid = parent_teid;
1864 buf->hdr.dest_parent_teid = n_prt->info.node_teid;
1865 buf->hdr.num_elems = cpu_to_le16(1);
1866 buf->hdr.mode = ICE_AQC_MOVE_ELEM_MODE_KEEP_OWN;
1867 buf->teid[0] = teid;
1868
1869 if (ice_aq_move_sched_elems(&lag->pf->hw, 1, buf, buf_size, &num_moved,
1870 NULL))
1871 dev_warn(dev, "Failure to move VF nodes for LAG reset rebuild\n");
1872 else
1873 ice_sched_update_parent(n_prt, ctx->sched.vsi_node[tc]);
1874
1875 kfree(buf);
1876 goto resume_sync;
1877
1878 sync_qerr:
1879 kfree(qbuf);
1880
1881 resume_sync:
1882 if (ice_sched_suspend_resume_elems(hw, 1, &tmp_teid, false))
1883 dev_warn(dev, "Problem restarting traffic for LAG node reset rebuild\n");
1884 }
1885
1886 /**
1887 * ice_lag_move_vf_nodes_sync - move vf nodes to active interface
1888 * @lag: primary interfaces lag struct
1889 * @dest_hw: lport value for currently active port
1890 *
1891 * This function is used in a reset context, outside of event handling,
1892 * to move the VF nodes to the secondary interface when that interface
1893 * is the active interface during a reset rebuild
1894 */
1895 static void
ice_lag_move_vf_nodes_sync(struct ice_lag * lag,struct ice_hw * dest_hw)1896 ice_lag_move_vf_nodes_sync(struct ice_lag *lag, struct ice_hw *dest_hw)
1897 {
1898 struct ice_pf *pf;
1899 int i, tc;
1900
1901 if (!lag->primary || !dest_hw)
1902 return;
1903
1904 pf = lag->pf;
1905 ice_for_each_vsi(pf, i)
1906 if (pf->vsi[i] && (pf->vsi[i]->type == ICE_VSI_VF ||
1907 pf->vsi[i]->type == ICE_VSI_SWITCHDEV_CTRL))
1908 ice_for_each_traffic_class(tc)
1909 ice_lag_move_vf_nodes_tc_sync(lag, dest_hw, i,
1910 tc);
1911 }
1912
1913 /**
1914 * ice_init_lag - initialize support for LAG
1915 * @pf: PF struct
1916 *
1917 * Alloc memory for LAG structs and initialize the elements.
1918 * Memory will be freed in ice_deinit_lag
1919 */
ice_init_lag(struct ice_pf * pf)1920 int ice_init_lag(struct ice_pf *pf)
1921 {
1922 struct device *dev = ice_pf_to_dev(pf);
1923 struct ice_lag *lag;
1924 struct ice_vsi *vsi;
1925 u64 recipe_bits = 0;
1926 int n, err;
1927
1928 ice_lag_init_feature_support_flag(pf);
1929
1930 pf->lag = kzalloc(sizeof(*lag), GFP_KERNEL);
1931 if (!pf->lag)
1932 return -ENOMEM;
1933 lag = pf->lag;
1934
1935 vsi = ice_get_main_vsi(pf);
1936 if (!vsi) {
1937 dev_err(dev, "couldn't get main vsi, link aggregation init fail\n");
1938 err = -EIO;
1939 goto lag_error;
1940 }
1941
1942 lag->pf = pf;
1943 lag->netdev = vsi->netdev;
1944 lag->role = ICE_LAG_NONE;
1945 lag->active_port = ICE_LAG_INVALID_PORT;
1946 lag->bonded = false;
1947 lag->upper_netdev = NULL;
1948 lag->notif_block.notifier_call = NULL;
1949
1950 err = ice_register_lag_handler(lag);
1951 if (err) {
1952 dev_warn(dev, "INIT LAG: Failed to register event handler\n");
1953 goto lag_error;
1954 }
1955
1956 err = ice_create_lag_recipe(&pf->hw, &lag->pf_recipe, ice_dflt_vsi_rcp,
1957 1);
1958 if (err)
1959 goto lag_error;
1960
1961 /* associate recipes to profiles */
1962 for (n = 0; n < ICE_PROFID_IPV6_GTPU_IPV6_TCP_INNER; n++) {
1963 err = ice_aq_get_recipe_to_profile(&pf->hw, n,
1964 (u8 *)&recipe_bits, NULL);
1965 if (err)
1966 continue;
1967
1968 if (recipe_bits & BIT(ICE_SW_LKUP_DFLT)) {
1969 recipe_bits |= BIT(lag->pf_recipe);
1970 ice_aq_map_recipe_to_profile(&pf->hw, n,
1971 (u8 *)&recipe_bits, NULL);
1972 }
1973 }
1974
1975 ice_display_lag_info(lag);
1976
1977 dev_dbg(dev, "INIT LAG complete\n");
1978 return 0;
1979
1980 lag_error:
1981 kfree(lag);
1982 pf->lag = NULL;
1983 return err;
1984 }
1985
1986 /**
1987 * ice_deinit_lag - Clean up LAG
1988 * @pf: PF struct
1989 *
1990 * Clean up kernel LAG info and free memory
1991 * This function is meant to only be called on driver remove/shutdown
1992 */
ice_deinit_lag(struct ice_pf * pf)1993 void ice_deinit_lag(struct ice_pf *pf)
1994 {
1995 struct ice_lag *lag;
1996
1997 lag = pf->lag;
1998
1999 if (!lag)
2000 return;
2001
2002 if (lag->pf)
2003 ice_unregister_lag_handler(lag);
2004
2005 flush_workqueue(ice_lag_wq);
2006
2007 ice_free_hw_res(&pf->hw, ICE_AQC_RES_TYPE_RECIPE, 1,
2008 &pf->lag->pf_recipe);
2009
2010 kfree(lag);
2011
2012 pf->lag = NULL;
2013 }
2014
2015 /**
2016 * ice_lag_rebuild - rebuild lag resources after reset
2017 * @pf: pointer to local pf struct
2018 *
2019 * PF resets are promoted to CORER resets when interface in an aggregate. This
2020 * means that we need to rebuild the PF resources for the interface. Since
2021 * this will happen outside the normal event processing, need to acquire the lag
2022 * lock.
2023 *
2024 * This function will also evaluate the VF resources if this is the primary
2025 * interface.
2026 */
ice_lag_rebuild(struct ice_pf * pf)2027 void ice_lag_rebuild(struct ice_pf *pf)
2028 {
2029 struct ice_lag_netdev_list ndlist;
2030 struct ice_lag *lag, *prim_lag;
2031 struct list_head *tmp, *n;
2032 u8 act_port, loc_port;
2033
2034 if (!pf->lag || !pf->lag->bonded)
2035 return;
2036
2037 mutex_lock(&pf->lag_mutex);
2038
2039 lag = pf->lag;
2040 if (lag->primary) {
2041 prim_lag = lag;
2042 } else {
2043 struct ice_lag_netdev_list *nl;
2044 struct net_device *tmp_nd;
2045
2046 INIT_LIST_HEAD(&ndlist.node);
2047 rcu_read_lock();
2048 for_each_netdev_in_bond_rcu(lag->upper_netdev, tmp_nd) {
2049 nl = kzalloc(sizeof(*nl), GFP_KERNEL);
2050 if (!nl)
2051 break;
2052
2053 nl->netdev = tmp_nd;
2054 list_add(&nl->node, &ndlist.node);
2055 }
2056 rcu_read_unlock();
2057 lag->netdev_head = &ndlist.node;
2058 prim_lag = ice_lag_find_primary(lag);
2059 }
2060
2061 if (!prim_lag) {
2062 dev_dbg(ice_pf_to_dev(pf), "No primary interface in aggregate, can't rebuild\n");
2063 goto lag_rebuild_out;
2064 }
2065
2066 act_port = prim_lag->active_port;
2067 loc_port = lag->pf->hw.port_info->lport;
2068
2069 /* configure SWID for this port */
2070 if (lag->primary) {
2071 ice_lag_primary_swid(lag, true);
2072 } else {
2073 ice_lag_set_swid(prim_lag->pf->hw.port_info->sw_id, lag, true);
2074 ice_lag_add_prune_list(prim_lag, pf);
2075 if (act_port == loc_port)
2076 ice_lag_move_vf_nodes_sync(prim_lag, &pf->hw);
2077 }
2078
2079 ice_lag_cfg_cp_fltr(lag, true);
2080
2081 if (lag->pf_rule_id)
2082 if (ice_lag_cfg_dflt_fltr(lag, true))
2083 dev_err(ice_pf_to_dev(pf), "Error adding default VSI rule in rebuild\n");
2084
2085 ice_clear_rdma_cap(pf);
2086 lag_rebuild_out:
2087 list_for_each_safe(tmp, n, &ndlist.node) {
2088 struct ice_lag_netdev_list *entry;
2089
2090 entry = list_entry(tmp, struct ice_lag_netdev_list, node);
2091 list_del(&entry->node);
2092 kfree(entry);
2093 }
2094 mutex_unlock(&pf->lag_mutex);
2095 }
2096
2097 /**
2098 * ice_lag_is_switchdev_running
2099 * @pf: pointer to PF structure
2100 *
2101 * Check if switchdev is running on any of the interfaces connected to lag.
2102 */
ice_lag_is_switchdev_running(struct ice_pf * pf)2103 bool ice_lag_is_switchdev_running(struct ice_pf *pf)
2104 {
2105 struct ice_lag *lag = pf->lag;
2106 struct net_device *tmp_nd;
2107
2108 if (!ice_is_feature_supported(pf, ICE_F_SRIOV_LAG) || !lag)
2109 return false;
2110
2111 rcu_read_lock();
2112 for_each_netdev_in_bond_rcu(lag->upper_netdev, tmp_nd) {
2113 struct ice_netdev_priv *priv = netdev_priv(tmp_nd);
2114
2115 if (!netif_is_ice(tmp_nd) || !priv || !priv->vsi ||
2116 !priv->vsi->back)
2117 continue;
2118
2119 if (ice_is_switchdev_running(priv->vsi->back)) {
2120 rcu_read_unlock();
2121 return true;
2122 }
2123 }
2124 rcu_read_unlock();
2125
2126 return false;
2127 }
2128
