1// SPDX-License-Identifier: GPL-2.0
  2/* Copyright (C) 2018-2020, Intel Corporation. */
  3
  4#include "ice.h"
  5#include <net/rps.h>
  6
  7/**
  8 * ice_is_arfs_active - helper to check is aRFS is active
  9 * @vsi: VSI to check
 10 */
 11static bool ice_is_arfs_active(struct ice_vsi *vsi)
 12{
 13	return !!vsi->arfs_fltr_list;
 14}
 15
 16/**
 17 * ice_is_arfs_using_perfect_flow - check if aRFS has active perfect filters
 18 * @hw: pointer to the HW structure
 19 * @flow_type: flow type as Flow Director understands it
 20 *
 21 * Flow Director will query this function to see if aRFS is currently using
 22 * the specified flow_type for perfect (4-tuple) filters.
 23 */
 24bool
 25ice_is_arfs_using_perfect_flow(struct ice_hw *hw, enum ice_fltr_ptype flow_type)
 26{
 27	struct ice_arfs_active_fltr_cntrs *arfs_fltr_cntrs;
 28	struct ice_pf *pf = hw->back;
 29	struct ice_vsi *vsi;
 30
 31	vsi = ice_get_main_vsi(pf);
 32	if (!vsi)
 33		return false;
 34
 35	arfs_fltr_cntrs = vsi->arfs_fltr_cntrs;
 36
 37	/* active counters can be updated by multiple CPUs */
 38	smp_mb__before_atomic();
 39	switch (flow_type) {
 40	case ICE_FLTR_PTYPE_NONF_IPV4_UDP:
 41		return atomic_read(&arfs_fltr_cntrs->active_udpv4_cnt) > 0;
 42	case ICE_FLTR_PTYPE_NONF_IPV6_UDP:
 43		return atomic_read(&arfs_fltr_cntrs->active_udpv6_cnt) > 0;
 44	case ICE_FLTR_PTYPE_NONF_IPV4_TCP:
 45		return atomic_read(&arfs_fltr_cntrs->active_tcpv4_cnt) > 0;
 46	case ICE_FLTR_PTYPE_NONF_IPV6_TCP:
 47		return atomic_read(&arfs_fltr_cntrs->active_tcpv6_cnt) > 0;
 48	default:
 49		return false;
 50	}
 51}
 52
 53/**
 54 * ice_arfs_update_active_fltr_cntrs - update active filter counters for aRFS
 55 * @vsi: VSI that aRFS is active on
 56 * @entry: aRFS entry used to change counters
 57 * @add: true to increment counter, false to decrement
 58 */
 59static void
 60ice_arfs_update_active_fltr_cntrs(struct ice_vsi *vsi,
 61				  struct ice_arfs_entry *entry, bool add)
 62{
 63	struct ice_arfs_active_fltr_cntrs *fltr_cntrs = vsi->arfs_fltr_cntrs;
 64
 65	switch (entry->fltr_info.flow_type) {
 66	case ICE_FLTR_PTYPE_NONF_IPV4_TCP:
 67		if (add)
 68			atomic_inc(&fltr_cntrs->active_tcpv4_cnt);
 69		else
 70			atomic_dec(&fltr_cntrs->active_tcpv4_cnt);
 71		break;
 72	case ICE_FLTR_PTYPE_NONF_IPV6_TCP:
 73		if (add)
 74			atomic_inc(&fltr_cntrs->active_tcpv6_cnt);
 75		else
 76			atomic_dec(&fltr_cntrs->active_tcpv6_cnt);
 77		break;
 78	case ICE_FLTR_PTYPE_NONF_IPV4_UDP:
 79		if (add)
 80			atomic_inc(&fltr_cntrs->active_udpv4_cnt);
 81		else
 82			atomic_dec(&fltr_cntrs->active_udpv4_cnt);
 83		break;
 84	case ICE_FLTR_PTYPE_NONF_IPV6_UDP:
 85		if (add)
 86			atomic_inc(&fltr_cntrs->active_udpv6_cnt);
 87		else
 88			atomic_dec(&fltr_cntrs->active_udpv6_cnt);
 89		break;
 90	default:
 91		dev_err(ice_pf_to_dev(vsi->back), "aRFS: Failed to update filter counters, invalid filter type %d\n",
 92			entry->fltr_info.flow_type);
 93	}
 94}
 95
 96/**
 97 * ice_arfs_del_flow_rules - delete the rules passed in from HW
 98 * @vsi: VSI for the flow rules that need to be deleted
 99 * @del_list_head: head of the list of ice_arfs_entry(s) for rule deletion
100 *
101 * Loop through the delete list passed in and remove the rules from HW. After
102 * each rule is deleted, disconnect and free the ice_arfs_entry because it is no
103 * longer being referenced by the aRFS hash table.
104 */
105static void
106ice_arfs_del_flow_rules(struct ice_vsi *vsi, struct hlist_head *del_list_head)
107{
108	struct ice_arfs_entry *e;
109	struct hlist_node *n;
110	struct device *dev;
111
112	dev = ice_pf_to_dev(vsi->back);
113
114	hlist_for_each_entry_safe(e, n, del_list_head, list_entry) {
115		int result;
116
117		result = ice_fdir_write_fltr(vsi->back, &e->fltr_info, false,
118					     false);
119		if (!result)
120			ice_arfs_update_active_fltr_cntrs(vsi, e, false);
121		else
122			dev_dbg(dev, "Unable to delete aRFS entry, err %d fltr_state %d fltr_id %d flow_id %d Q %d\n",
123				result, e->fltr_state, e->fltr_info.fltr_id,
124				e->flow_id, e->fltr_info.q_index);
125
126		/* The aRFS hash table is no longer referencing this entry */
127		hlist_del(&e->list_entry);
128		devm_kfree(dev, e);
129	}
130}
131
132/**
133 * ice_arfs_add_flow_rules - add the rules passed in from HW
134 * @vsi: VSI for the flow rules that need to be added
135 * @add_list_head: head of the list of ice_arfs_entry_ptr(s) for rule addition
136 *
137 * Loop through the add list passed in and remove the rules from HW. After each
138 * rule is added, disconnect and free the ice_arfs_entry_ptr node. Don't free
139 * the ice_arfs_entry(s) because they are still being referenced in the aRFS
140 * hash table.
141 */
142static void
143ice_arfs_add_flow_rules(struct ice_vsi *vsi, struct hlist_head *add_list_head)
144{
145	struct ice_arfs_entry_ptr *ep;
146	struct hlist_node *n;
147	struct device *dev;
148
149	dev = ice_pf_to_dev(vsi->back);
150
151	hlist_for_each_entry_safe(ep, n, add_list_head, list_entry) {
152		int result;
153
154		result = ice_fdir_write_fltr(vsi->back,
155					     &ep->arfs_entry->fltr_info, true,
156					     false);
157		if (!result)
158			ice_arfs_update_active_fltr_cntrs(vsi, ep->arfs_entry,
159							  true);
160		else
161			dev_dbg(dev, "Unable to add aRFS entry, err %d fltr_state %d fltr_id %d flow_id %d Q %d\n",
162				result, ep->arfs_entry->fltr_state,
163				ep->arfs_entry->fltr_info.fltr_id,
164				ep->arfs_entry->flow_id,
165				ep->arfs_entry->fltr_info.q_index);
166
167		hlist_del(&ep->list_entry);
168		devm_kfree(dev, ep);
169	}
170}
171
172/**
173 * ice_arfs_is_flow_expired - check if the aRFS entry has expired
174 * @vsi: VSI containing the aRFS entry
175 * @arfs_entry: aRFS entry that's being checked for expiration
176 *
177 * Return true if the flow has expired, else false. This function should be used
178 * to determine whether or not an aRFS entry should be removed from the hardware
179 * and software structures.
180 */
181static bool
182ice_arfs_is_flow_expired(struct ice_vsi *vsi, struct ice_arfs_entry *arfs_entry)
183{
184#define ICE_ARFS_TIME_DELTA_EXPIRATION	msecs_to_jiffies(5000)
185	if (rps_may_expire_flow(vsi->netdev, arfs_entry->fltr_info.q_index,
186				arfs_entry->flow_id,
187				arfs_entry->fltr_info.fltr_id))
188		return true;
189
190	/* expiration timer only used for UDP filters */
191	if (arfs_entry->fltr_info.flow_type != ICE_FLTR_PTYPE_NONF_IPV4_UDP &&
192	    arfs_entry->fltr_info.flow_type != ICE_FLTR_PTYPE_NONF_IPV6_UDP)
193		return false;
194
195	return time_in_range64(arfs_entry->time_activated +
196			       ICE_ARFS_TIME_DELTA_EXPIRATION,
197			       arfs_entry->time_activated, get_jiffies_64());
198}
199
200/**
201 * ice_arfs_update_flow_rules - add/delete aRFS rules in HW
202 * @vsi: the VSI to be forwarded to
203 * @idx: index into the table of aRFS filter lists. Obtained from skb->hash
204 * @add_list: list to populate with filters to be added to Flow Director
205 * @del_list: list to populate with filters to be deleted from Flow Director
206 *
207 * Iterate over the hlist at the index given in the aRFS hash table and
208 * determine if there are any aRFS entries that need to be either added or
209 * deleted in the HW. If the aRFS entry is marked as ICE_ARFS_INACTIVE the
210 * filter needs to be added to HW, else if it's marked as ICE_ARFS_ACTIVE and
211 * the flow has expired delete the filter from HW. The caller of this function
212 * is expected to add/delete rules on the add_list/del_list respectively.
213 */
214static void
215ice_arfs_update_flow_rules(struct ice_vsi *vsi, u16 idx,
216			   struct hlist_head *add_list,
217			   struct hlist_head *del_list)
218{
219	struct ice_arfs_entry *e;
220	struct hlist_node *n;
221	struct device *dev;
222
223	dev = ice_pf_to_dev(vsi->back);
224
225	/* go through the aRFS hlist at this idx and check for needed updates */
226	hlist_for_each_entry_safe(e, n, &vsi->arfs_fltr_list[idx], list_entry)
227		/* check if filter needs to be added to HW */
228		if (e->fltr_state == ICE_ARFS_INACTIVE) {
229			enum ice_fltr_ptype flow_type = e->fltr_info.flow_type;
230			struct ice_arfs_entry_ptr *ep =
231				devm_kzalloc(dev, sizeof(*ep), GFP_ATOMIC);
232
233			if (!ep)
234				continue;
235			INIT_HLIST_NODE(&ep->list_entry);
236			/* reference aRFS entry to add HW filter */
237			ep->arfs_entry = e;
238			hlist_add_head(&ep->list_entry, add_list);
239			e->fltr_state = ICE_ARFS_ACTIVE;
240			/* expiration timer only used for UDP flows */
241			if (flow_type == ICE_FLTR_PTYPE_NONF_IPV4_UDP ||
242			    flow_type == ICE_FLTR_PTYPE_NONF_IPV6_UDP)
243				e->time_activated = get_jiffies_64();
244		} else if (e->fltr_state == ICE_ARFS_ACTIVE) {
245			/* check if filter needs to be removed from HW */
246			if (ice_arfs_is_flow_expired(vsi, e)) {
247				/* remove aRFS entry from hash table for delete
248				 * and to prevent referencing it the next time
249				 * through this hlist index
250				 */
251				hlist_del(&e->list_entry);
252				e->fltr_state = ICE_ARFS_TODEL;
253				/* save reference to aRFS entry for delete */
254				hlist_add_head(&e->list_entry, del_list);
255			}
256		}
257}
258
259/**
260 * ice_sync_arfs_fltrs - update all aRFS filters
261 * @pf: board private structure
262 */
263void ice_sync_arfs_fltrs(struct ice_pf *pf)
264{
265	HLIST_HEAD(tmp_del_list);
266	HLIST_HEAD(tmp_add_list);
267	struct ice_vsi *pf_vsi;
268	unsigned int i;
269
270	pf_vsi = ice_get_main_vsi(pf);
271	if (!pf_vsi)
272		return;
273
274	if (!ice_is_arfs_active(pf_vsi))
275		return;
276
277	spin_lock_bh(&pf_vsi->arfs_lock);
278	/* Once we process aRFS for the PF VSI get out */
279	for (i = 0; i < ICE_MAX_ARFS_LIST; i++)
280		ice_arfs_update_flow_rules(pf_vsi, i, &tmp_add_list,
281					   &tmp_del_list);
282	spin_unlock_bh(&pf_vsi->arfs_lock);
283
284	/* use list of ice_arfs_entry(s) for delete */
285	ice_arfs_del_flow_rules(pf_vsi, &tmp_del_list);
286
287	/* use list of ice_arfs_entry_ptr(s) for add */
288	ice_arfs_add_flow_rules(pf_vsi, &tmp_add_list);
289}
290
291/**
292 * ice_arfs_build_entry - builds an aRFS entry based on input
293 * @vsi: destination VSI for this flow
294 * @fk: flow dissector keys for creating the tuple
295 * @rxq_idx: Rx queue to steer this flow to
296 * @flow_id: passed down from the stack and saved for flow expiration
297 *
298 * returns an aRFS entry on success and NULL on failure
299 */
300static struct ice_arfs_entry *
301ice_arfs_build_entry(struct ice_vsi *vsi, const struct flow_keys *fk,
302		     u16 rxq_idx, u32 flow_id)
303{
304	struct ice_arfs_entry *arfs_entry;
305	struct ice_fdir_fltr *fltr_info;
306	u8 ip_proto;
307
308	arfs_entry = devm_kzalloc(ice_pf_to_dev(vsi->back),
309				  sizeof(*arfs_entry),
310				  GFP_ATOMIC | __GFP_NOWARN);
311	if (!arfs_entry)
312		return NULL;
313
314	fltr_info = &arfs_entry->fltr_info;
315	fltr_info->q_index = rxq_idx;
316	fltr_info->dest_ctl = ICE_FLTR_PRGM_DESC_DEST_DIRECT_PKT_QINDEX;
317	fltr_info->dest_vsi = vsi->idx;
318	ip_proto = fk->basic.ip_proto;
319
320	if (fk->basic.n_proto == htons(ETH_P_IP)) {
321		fltr_info->ip.v4.proto = ip_proto;
322		fltr_info->flow_type = (ip_proto == IPPROTO_TCP) ?
323			ICE_FLTR_PTYPE_NONF_IPV4_TCP :
324			ICE_FLTR_PTYPE_NONF_IPV4_UDP;
325		fltr_info->ip.v4.src_ip = fk->addrs.v4addrs.src;
326		fltr_info->ip.v4.dst_ip = fk->addrs.v4addrs.dst;
327		fltr_info->ip.v4.src_port = fk->ports.src;
328		fltr_info->ip.v4.dst_port = fk->ports.dst;
329	} else { /* ETH_P_IPV6 */
330		fltr_info->ip.v6.proto = ip_proto;
331		fltr_info->flow_type = (ip_proto == IPPROTO_TCP) ?
332			ICE_FLTR_PTYPE_NONF_IPV6_TCP :
333			ICE_FLTR_PTYPE_NONF_IPV6_UDP;
334		memcpy(&fltr_info->ip.v6.src_ip, &fk->addrs.v6addrs.src,
335		       sizeof(struct in6_addr));
336		memcpy(&fltr_info->ip.v6.dst_ip, &fk->addrs.v6addrs.dst,
337		       sizeof(struct in6_addr));
338		fltr_info->ip.v6.src_port = fk->ports.src;
339		fltr_info->ip.v6.dst_port = fk->ports.dst;
340	}
341
342	arfs_entry->flow_id = flow_id;
343	fltr_info->fltr_id =
344		atomic_inc_return(vsi->arfs_last_fltr_id) % RPS_NO_FILTER;
345
346	return arfs_entry;
347}
348
349/**
350 * ice_arfs_is_perfect_flow_set - Check to see if perfect flow is set
351 * @hw: pointer to HW structure
352 * @l3_proto: ETH_P_IP or ETH_P_IPV6 in network order
353 * @l4_proto: IPPROTO_UDP or IPPROTO_TCP
354 *
355 * We only support perfect (4-tuple) filters for aRFS. This function allows aRFS
356 * to check if perfect (4-tuple) flow rules are currently in place by Flow
357 * Director.
358 */
359static bool
360ice_arfs_is_perfect_flow_set(struct ice_hw *hw, __be16 l3_proto, u8 l4_proto)
361{
362	unsigned long *perfect_fltr = hw->fdir_perfect_fltr;
363
364	/* advanced Flow Director disabled, perfect filters always supported */
365	if (!perfect_fltr)
366		return true;
367
368	if (l3_proto == htons(ETH_P_IP) && l4_proto == IPPROTO_UDP)
369		return test_bit(ICE_FLTR_PTYPE_NONF_IPV4_UDP, perfect_fltr);
370	else if (l3_proto == htons(ETH_P_IP) && l4_proto == IPPROTO_TCP)
371		return test_bit(ICE_FLTR_PTYPE_NONF_IPV4_TCP, perfect_fltr);
372	else if (l3_proto == htons(ETH_P_IPV6) && l4_proto == IPPROTO_UDP)
373		return test_bit(ICE_FLTR_PTYPE_NONF_IPV6_UDP, perfect_fltr);
374	else if (l3_proto == htons(ETH_P_IPV6) && l4_proto == IPPROTO_TCP)
375		return test_bit(ICE_FLTR_PTYPE_NONF_IPV6_TCP, perfect_fltr);
376
377	return false;
378}
379
380/**
381 * ice_rx_flow_steer - steer the Rx flow to where application is being run
382 * @netdev: ptr to the netdev being adjusted
383 * @skb: buffer with required header information
384 * @rxq_idx: queue to which the flow needs to move
385 * @flow_id: flow identifier provided by the netdev
386 *
387 * Based on the skb, rxq_idx, and flow_id passed in add/update an entry in the
388 * aRFS hash table. Iterate over one of the hlists in the aRFS hash table and
389 * if the flow_id already exists in the hash table but the rxq_idx has changed
390 * mark the entry as ICE_ARFS_INACTIVE so it can get updated in HW, else
391 * if the entry is marked as ICE_ARFS_TODEL delete it from the aRFS hash table.
392 * If neither of the previous conditions are true then add a new entry in the
393 * aRFS hash table, which gets set to ICE_ARFS_INACTIVE by default so it can be
394 * added to HW.
395 */
396int
397ice_rx_flow_steer(struct net_device *netdev, const struct sk_buff *skb,
398		  u16 rxq_idx, u32 flow_id)
399{
400	struct ice_netdev_priv *np = netdev_priv(netdev);
401	struct ice_arfs_entry *arfs_entry;
402	struct ice_vsi *vsi = np->vsi;
403	struct flow_keys fk;
404	struct ice_pf *pf;
405	__be16 n_proto;
406	u8 ip_proto;
407	u16 idx;
408	int ret;
409
410	/* failed to allocate memory for aRFS so don't crash */
411	if (unlikely(!vsi->arfs_fltr_list))
412		return -ENODEV;
413
414	pf = vsi->back;
415
416	if (skb->encapsulation)
417		return -EPROTONOSUPPORT;
418
419	if (!skb_flow_dissect_flow_keys(skb, &fk, 0))
420		return -EPROTONOSUPPORT;
421
422	n_proto = fk.basic.n_proto;
423	/* Support only IPV4 and IPV6 */
424	if ((n_proto == htons(ETH_P_IP) && !ip_is_fragment(ip_hdr(skb))) ||
425	    n_proto == htons(ETH_P_IPV6))
426		ip_proto = fk.basic.ip_proto;
427	else
428		return -EPROTONOSUPPORT;
429
430	/* Support only TCP and UDP */
431	if (ip_proto != IPPROTO_TCP && ip_proto != IPPROTO_UDP)
432		return -EPROTONOSUPPORT;
433
434	/* only support 4-tuple filters for aRFS */
435	if (!ice_arfs_is_perfect_flow_set(&pf->hw, n_proto, ip_proto))
436		return -EOPNOTSUPP;
437
438	/* choose the aRFS list bucket based on skb hash */
439	idx = skb_get_hash_raw(skb) & ICE_ARFS_LST_MASK;
440	/* search for entry in the bucket */
441	spin_lock_bh(&vsi->arfs_lock);
442	hlist_for_each_entry(arfs_entry, &vsi->arfs_fltr_list[idx],
443			     list_entry) {
444		struct ice_fdir_fltr *fltr_info;
445
446		/* keep searching for the already existing arfs_entry flow */
447		if (arfs_entry->flow_id != flow_id)
448			continue;
449
450		fltr_info = &arfs_entry->fltr_info;
451		ret = fltr_info->fltr_id;
452
453		if (fltr_info->q_index == rxq_idx ||
454		    arfs_entry->fltr_state != ICE_ARFS_ACTIVE)
455			goto out;
456
457		/* update the queue to forward to on an already existing flow */
458		fltr_info->q_index = rxq_idx;
459		arfs_entry->fltr_state = ICE_ARFS_INACTIVE;
460		ice_arfs_update_active_fltr_cntrs(vsi, arfs_entry, false);
461		goto out_schedule_service_task;
462	}
463
464	arfs_entry = ice_arfs_build_entry(vsi, &fk, rxq_idx, flow_id);
465	if (!arfs_entry) {
466		ret = -ENOMEM;
467		goto out;
468	}
469
470	ret = arfs_entry->fltr_info.fltr_id;
471	INIT_HLIST_NODE(&arfs_entry->list_entry);
472	hlist_add_head(&arfs_entry->list_entry, &vsi->arfs_fltr_list[idx]);
473out_schedule_service_task:
474	ice_service_task_schedule(pf);
475out:
476	spin_unlock_bh(&vsi->arfs_lock);
477	return ret;
478}
479
480/**
481 * ice_init_arfs_cntrs - initialize aRFS counter values
482 * @vsi: VSI that aRFS counters need to be initialized on
483 */
484static int ice_init_arfs_cntrs(struct ice_vsi *vsi)
485{
486	if (!vsi || vsi->type != ICE_VSI_PF)
487		return -EINVAL;
488
489	vsi->arfs_fltr_cntrs = kzalloc(sizeof(*vsi->arfs_fltr_cntrs),
490				       GFP_KERNEL);
491	if (!vsi->arfs_fltr_cntrs)
492		return -ENOMEM;
493
494	vsi->arfs_last_fltr_id = kzalloc(sizeof(*vsi->arfs_last_fltr_id),
495					 GFP_KERNEL);
496	if (!vsi->arfs_last_fltr_id) {
497		kfree(vsi->arfs_fltr_cntrs);
498		vsi->arfs_fltr_cntrs = NULL;
499		return -ENOMEM;
500	}
501
502	return 0;
503}
504
505/**
506 * ice_init_arfs - initialize aRFS resources
507 * @vsi: the VSI to be forwarded to
508 */
509void ice_init_arfs(struct ice_vsi *vsi)
510{
511	struct hlist_head *arfs_fltr_list;
512	unsigned int i;
513
514	if (!vsi || vsi->type != ICE_VSI_PF)
515		return;
516
517	arfs_fltr_list = kcalloc(ICE_MAX_ARFS_LIST, sizeof(*arfs_fltr_list),
518				 GFP_KERNEL);
519	if (!arfs_fltr_list)
520		return;
521
522	if (ice_init_arfs_cntrs(vsi))
523		goto free_arfs_fltr_list;
524
525	for (i = 0; i < ICE_MAX_ARFS_LIST; i++)
526		INIT_HLIST_HEAD(&arfs_fltr_list[i]);
527
528	spin_lock_init(&vsi->arfs_lock);
529
530	vsi->arfs_fltr_list = arfs_fltr_list;
531
532	return;
533
534free_arfs_fltr_list:
535	kfree(arfs_fltr_list);
536}
537
538/**
539 * ice_clear_arfs - clear the aRFS hash table and any memory used for aRFS
540 * @vsi: the VSI to be forwarded to
541 */
542void ice_clear_arfs(struct ice_vsi *vsi)
543{
544	struct device *dev;
545	unsigned int i;
546
547	if (!vsi || vsi->type != ICE_VSI_PF || !vsi->back ||
548	    !vsi->arfs_fltr_list)
549		return;
550
551	dev = ice_pf_to_dev(vsi->back);
552	for (i = 0; i < ICE_MAX_ARFS_LIST; i++) {
553		struct ice_arfs_entry *r;
554		struct hlist_node *n;
555
556		spin_lock_bh(&vsi->arfs_lock);
557		hlist_for_each_entry_safe(r, n, &vsi->arfs_fltr_list[i],
558					  list_entry) {
559			hlist_del(&r->list_entry);
560			devm_kfree(dev, r);
561		}
562		spin_unlock_bh(&vsi->arfs_lock);
563	}
564
565	kfree(vsi->arfs_fltr_list);
566	vsi->arfs_fltr_list = NULL;
567	kfree(vsi->arfs_last_fltr_id);
568	vsi->arfs_last_fltr_id = NULL;
569	kfree(vsi->arfs_fltr_cntrs);
570	vsi->arfs_fltr_cntrs = NULL;
571}
572
573/**
574 * ice_free_cpu_rx_rmap - free setup CPU reverse map
575 * @vsi: the VSI to be forwarded to
576 */
577void ice_free_cpu_rx_rmap(struct ice_vsi *vsi)
578{
579	struct net_device *netdev;
580
581	if (!vsi || vsi->type != ICE_VSI_PF)
582		return;
583
584	netdev = vsi->netdev;
585	if (!netdev || !netdev->rx_cpu_rmap)
586		return;
587
588	free_irq_cpu_rmap(netdev->rx_cpu_rmap);
589	netdev->rx_cpu_rmap = NULL;
590}
591
592/**
593 * ice_set_cpu_rx_rmap - setup CPU reverse map for each queue
594 * @vsi: the VSI to be forwarded to
595 */
596int ice_set_cpu_rx_rmap(struct ice_vsi *vsi)
597{
598	struct net_device *netdev;
599	struct ice_pf *pf;
600	int i;
601
602	if (!vsi || vsi->type != ICE_VSI_PF)
603		return 0;
604
605	pf = vsi->back;
606	netdev = vsi->netdev;
607	if (!pf || !netdev || !vsi->num_q_vectors)
608		return -EINVAL;
609
610	netdev_dbg(netdev, "Setup CPU RMAP: vsi type 0x%x, ifname %s, q_vectors %d\n",
611		   vsi->type, netdev->name, vsi->num_q_vectors);
612
613	netdev->rx_cpu_rmap = alloc_irq_cpu_rmap(vsi->num_q_vectors);
614	if (unlikely(!netdev->rx_cpu_rmap))
615		return -EINVAL;
616
617	ice_for_each_q_vector(vsi, i)
618		if (irq_cpu_rmap_add(netdev->rx_cpu_rmap,
619				     vsi->q_vectors[i]->irq.virq)) {
620			ice_free_cpu_rx_rmap(vsi);
621			return -EINVAL;
622		}
623
624	return 0;
625}
626
627/**
628 * ice_remove_arfs - remove/clear all aRFS resources
629 * @pf: device private structure
630 */
631void ice_remove_arfs(struct ice_pf *pf)
632{
633	struct ice_vsi *pf_vsi;
634
635	pf_vsi = ice_get_main_vsi(pf);
636	if (!pf_vsi)
637		return;
638
639	ice_clear_arfs(pf_vsi);
640}
641
642/**
643 * ice_rebuild_arfs - remove/clear all aRFS resources and rebuild after reset
644 * @pf: device private structure
645 */
646void ice_rebuild_arfs(struct ice_pf *pf)
647{
648	struct ice_vsi *pf_vsi;
649
650	pf_vsi = ice_get_main_vsi(pf);
651	if (!pf_vsi)
652		return;
653
654	ice_remove_arfs(pf);
655	ice_init_arfs(pf_vsi);
656}