1 // SPDX-License-Identifier: GPL-2.0
2 /* Marvell RVU Ethernet driver
3  *
4  * Copyright (C) 2020 Marvell.
5  *
6  */
7 
8 #include <net/ipv6.h>
9 #include <linux/sort.h>
10 
11 #include "otx2_common.h"
12 
13 #define OTX2_DEFAULT_ACTION	0x1
14 
15 static int otx2_mcam_entry_init(struct otx2_nic *pfvf);
16 
17 struct otx2_flow {
18 	struct ethtool_rx_flow_spec flow_spec;
19 	struct list_head list;
20 	u32 location;
21 	u32 entry;
22 	bool is_vf;
23 	u8 rss_ctx_id;
24 #define DMAC_FILTER_RULE		BIT(0)
25 #define PFC_FLOWCTRL_RULE		BIT(1)
26 	u16 rule_type;
27 	int vf;
28 };
29 
30 enum dmac_req {
31 	DMAC_ADDR_UPDATE,
32 	DMAC_ADDR_DEL
33 };
34 
35 static void otx2_clear_ntuple_flow_info(struct otx2_nic *pfvf, struct otx2_flow_config *flow_cfg)
36 {
37 	devm_kfree(pfvf->dev, flow_cfg->flow_ent);
38 	flow_cfg->flow_ent = NULL;
39 	flow_cfg->max_flows = 0;
40 }
41 
42 static int otx2_free_ntuple_mcam_entries(struct otx2_nic *pfvf)
43 {
44 	struct otx2_flow_config *flow_cfg = pfvf->flow_cfg;
45 	struct npc_mcam_free_entry_req *req;
46 	int ent, err;
47 
48 	if (!flow_cfg->max_flows)
49 		return 0;
50 
51 	mutex_lock(&pfvf->mbox.lock);
52 	for (ent = 0; ent < flow_cfg->max_flows; ent++) {
53 		req = otx2_mbox_alloc_msg_npc_mcam_free_entry(&pfvf->mbox);
54 		if (!req)
55 			break;
56 
57 		req->entry = flow_cfg->flow_ent[ent];
58 
59 		/* Send message to AF to free MCAM entries */
60 		err = otx2_sync_mbox_msg(&pfvf->mbox);
61 		if (err)
62 			break;
63 	}
64 	mutex_unlock(&pfvf->mbox.lock);
65 	otx2_clear_ntuple_flow_info(pfvf, flow_cfg);
66 	return 0;
67 }
68 
69 static int mcam_entry_cmp(const void *a, const void *b)
70 {
71 	return *(u16 *)a - *(u16 *)b;
72 }
73 
74 int otx2_alloc_mcam_entries(struct otx2_nic *pfvf, u16 count)
75 {
76 	struct otx2_flow_config *flow_cfg = pfvf->flow_cfg;
77 	struct npc_mcam_alloc_entry_req *req;
78 	struct npc_mcam_alloc_entry_rsp *rsp;
79 	int ent, allocated = 0;
80 
81 	/* Free current ones and allocate new ones with requested count */
82 	otx2_free_ntuple_mcam_entries(pfvf);
83 
84 	if (!count)
85 		return 0;
86 
87 	flow_cfg->flow_ent = devm_kmalloc_array(pfvf->dev, count,
88 						sizeof(u16), GFP_KERNEL);
89 	if (!flow_cfg->flow_ent) {
90 		netdev_err(pfvf->netdev,
91 			   "%s: Unable to allocate memory for flow entries\n",
92 			    __func__);
93 		return -ENOMEM;
94 	}
95 
96 	mutex_lock(&pfvf->mbox.lock);
97 
98 	/* In a single request a max of NPC_MAX_NONCONTIG_ENTRIES MCAM entries
99 	 * can only be allocated.
100 	 */
101 	while (allocated < count) {
102 		req = otx2_mbox_alloc_msg_npc_mcam_alloc_entry(&pfvf->mbox);
103 		if (!req)
104 			goto exit;
105 
106 		req->contig = false;
107 		req->count = (count - allocated) > NPC_MAX_NONCONTIG_ENTRIES ?
108 				NPC_MAX_NONCONTIG_ENTRIES : count - allocated;
109 
110 		/* Allocate higher priority entries for PFs, so that VF's entries
111 		 * will be on top of PF.
112 		 */
113 		if (!is_otx2_vf(pfvf->pcifunc)) {
114 			req->priority = NPC_MCAM_HIGHER_PRIO;
115 			req->ref_entry = flow_cfg->def_ent[0];
116 		}
117 
118 		/* Send message to AF */
119 		if (otx2_sync_mbox_msg(&pfvf->mbox))
120 			goto exit;
121 
122 		rsp = (struct npc_mcam_alloc_entry_rsp *)otx2_mbox_get_rsp
123 			(&pfvf->mbox.mbox, 0, &req->hdr);
124 
125 		for (ent = 0; ent < rsp->count; ent++)
126 			flow_cfg->flow_ent[ent + allocated] = rsp->entry_list[ent];
127 
128 		allocated += rsp->count;
129 
130 		/* If this request is not fulfilled, no need to send
131 		 * further requests.
132 		 */
133 		if (rsp->count != req->count)
134 			break;
135 	}
136 
137 	/* Multiple MCAM entry alloc requests could result in non-sequential
138 	 * MCAM entries in the flow_ent[] array. Sort them in an ascending order,
139 	 * otherwise user installed ntuple filter index and MCAM entry index will
140 	 * not be in sync.
141 	 */
142 	if (allocated)
143 		sort(&flow_cfg->flow_ent[0], allocated,
144 		     sizeof(flow_cfg->flow_ent[0]), mcam_entry_cmp, NULL);
145 
146 exit:
147 	mutex_unlock(&pfvf->mbox.lock);
148 
149 	flow_cfg->max_flows = allocated;
150 
151 	if (allocated) {
152 		pfvf->flags |= OTX2_FLAG_MCAM_ENTRIES_ALLOC;
153 		pfvf->flags |= OTX2_FLAG_NTUPLE_SUPPORT;
154 	}
155 
156 	if (allocated != count)
157 		netdev_info(pfvf->netdev,
158 			    "Unable to allocate %d MCAM entries, got only %d\n",
159 			    count, allocated);
160 	return allocated;
161 }
162 EXPORT_SYMBOL(otx2_alloc_mcam_entries);
163 
164 static int otx2_mcam_entry_init(struct otx2_nic *pfvf)
165 {
166 	struct otx2_flow_config *flow_cfg = pfvf->flow_cfg;
167 	struct npc_get_field_status_req *freq;
168 	struct npc_get_field_status_rsp *frsp;
169 	struct npc_mcam_alloc_entry_req *req;
170 	struct npc_mcam_alloc_entry_rsp *rsp;
171 	int vf_vlan_max_flows;
172 	int ent, count;
173 
174 	vf_vlan_max_flows = pfvf->total_vfs * OTX2_PER_VF_VLAN_FLOWS;
175 	count = OTX2_MAX_UNICAST_FLOWS +
176 			OTX2_MAX_VLAN_FLOWS + vf_vlan_max_flows;
177 
178 	flow_cfg->def_ent = devm_kmalloc_array(pfvf->dev, count,
179 					       sizeof(u16), GFP_KERNEL);
180 	if (!flow_cfg->def_ent)
181 		return -ENOMEM;
182 
183 	mutex_lock(&pfvf->mbox.lock);
184 
185 	req = otx2_mbox_alloc_msg_npc_mcam_alloc_entry(&pfvf->mbox);
186 	if (!req) {
187 		mutex_unlock(&pfvf->mbox.lock);
188 		return -ENOMEM;
189 	}
190 
191 	req->contig = false;
192 	req->count = count;
193 
194 	/* Send message to AF */
195 	if (otx2_sync_mbox_msg(&pfvf->mbox)) {
196 		mutex_unlock(&pfvf->mbox.lock);
197 		return -EINVAL;
198 	}
199 
200 	rsp = (struct npc_mcam_alloc_entry_rsp *)otx2_mbox_get_rsp
201 	       (&pfvf->mbox.mbox, 0, &req->hdr);
202 
203 	if (rsp->count != req->count) {
204 		netdev_info(pfvf->netdev,
205 			    "Unable to allocate MCAM entries for ucast, vlan and vf_vlan\n");
206 		mutex_unlock(&pfvf->mbox.lock);
207 		devm_kfree(pfvf->dev, flow_cfg->def_ent);
208 		return 0;
209 	}
210 
211 	for (ent = 0; ent < rsp->count; ent++)
212 		flow_cfg->def_ent[ent] = rsp->entry_list[ent];
213 
214 	flow_cfg->vf_vlan_offset = 0;
215 	flow_cfg->unicast_offset = vf_vlan_max_flows;
216 	flow_cfg->rx_vlan_offset = flow_cfg->unicast_offset +
217 					OTX2_MAX_UNICAST_FLOWS;
218 	pfvf->flags |= OTX2_FLAG_UCAST_FLTR_SUPPORT;
219 
220 	/* Check if NPC_DMAC field is supported
221 	 * by the mkex profile before setting VLAN support flag.
222 	 */
223 	freq = otx2_mbox_alloc_msg_npc_get_field_status(&pfvf->mbox);
224 	if (!freq) {
225 		mutex_unlock(&pfvf->mbox.lock);
226 		return -ENOMEM;
227 	}
228 
229 	freq->field = NPC_DMAC;
230 	if (otx2_sync_mbox_msg(&pfvf->mbox)) {
231 		mutex_unlock(&pfvf->mbox.lock);
232 		return -EINVAL;
233 	}
234 
235 	frsp = (struct npc_get_field_status_rsp *)otx2_mbox_get_rsp
236 	       (&pfvf->mbox.mbox, 0, &freq->hdr);
237 
238 	if (frsp->enable) {
239 		pfvf->flags |= OTX2_FLAG_RX_VLAN_SUPPORT;
240 		pfvf->flags |= OTX2_FLAG_VF_VLAN_SUPPORT;
241 	}
242 
243 	pfvf->flags |= OTX2_FLAG_MCAM_ENTRIES_ALLOC;
244 	mutex_unlock(&pfvf->mbox.lock);
245 
246 	/* Allocate entries for Ntuple filters */
247 	count = otx2_alloc_mcam_entries(pfvf, OTX2_DEFAULT_FLOWCOUNT);
248 	if (count <= 0) {
249 		otx2_clear_ntuple_flow_info(pfvf, flow_cfg);
250 		return 0;
251 	}
252 
253 	pfvf->flags |= OTX2_FLAG_TC_FLOWER_SUPPORT;
254 
255 	return 0;
256 }
257 
258 /* TODO : revisit on size */
259 #define OTX2_DMAC_FLTR_BITMAP_SZ (4 * 2048 + 32)
260 
261 int otx2vf_mcam_flow_init(struct otx2_nic *pfvf)
262 {
263 	struct otx2_flow_config *flow_cfg;
264 
265 	pfvf->flow_cfg = devm_kzalloc(pfvf->dev,
266 				      sizeof(struct otx2_flow_config),
267 				      GFP_KERNEL);
268 	if (!pfvf->flow_cfg)
269 		return -ENOMEM;
270 
271 	pfvf->flow_cfg->dmacflt_bmap = devm_kcalloc(pfvf->dev,
272 						    BITS_TO_LONGS(OTX2_DMAC_FLTR_BITMAP_SZ),
273 						    sizeof(long), GFP_KERNEL);
274 	if (!pfvf->flow_cfg->dmacflt_bmap)
275 		return -ENOMEM;
276 
277 	flow_cfg = pfvf->flow_cfg;
278 	INIT_LIST_HEAD(&flow_cfg->flow_list);
279 	flow_cfg->max_flows = 0;
280 
281 	return 0;
282 }
283 EXPORT_SYMBOL(otx2vf_mcam_flow_init);
284 
285 int otx2_mcam_flow_init(struct otx2_nic *pf)
286 {
287 	int err;
288 
289 	pf->flow_cfg = devm_kzalloc(pf->dev, sizeof(struct otx2_flow_config),
290 				    GFP_KERNEL);
291 	if (!pf->flow_cfg)
292 		return -ENOMEM;
293 
294 	pf->flow_cfg->dmacflt_bmap = devm_kcalloc(pf->dev,
295 						  BITS_TO_LONGS(OTX2_DMAC_FLTR_BITMAP_SZ),
296 						  sizeof(long), GFP_KERNEL);
297 	if (!pf->flow_cfg->dmacflt_bmap)
298 		return -ENOMEM;
299 
300 	INIT_LIST_HEAD(&pf->flow_cfg->flow_list);
301 
302 	/* Allocate bare minimum number of MCAM entries needed for
303 	 * unicast and ntuple filters.
304 	 */
305 	err = otx2_mcam_entry_init(pf);
306 	if (err)
307 		return err;
308 
309 	/* Check if MCAM entries are allocate or not */
310 	if (!(pf->flags & OTX2_FLAG_UCAST_FLTR_SUPPORT))
311 		return 0;
312 
313 	pf->mac_table = devm_kzalloc(pf->dev, sizeof(struct otx2_mac_table)
314 					* OTX2_MAX_UNICAST_FLOWS, GFP_KERNEL);
315 	if (!pf->mac_table)
316 		return -ENOMEM;
317 
318 	otx2_dmacflt_get_max_cnt(pf);
319 
320 	/* DMAC filters are not allocated */
321 	if (!pf->flow_cfg->dmacflt_max_flows)
322 		return 0;
323 
324 	pf->flow_cfg->bmap_to_dmacindex =
325 			devm_kzalloc(pf->dev, sizeof(u32) *
326 				     pf->flow_cfg->dmacflt_max_flows,
327 				     GFP_KERNEL);
328 
329 	if (!pf->flow_cfg->bmap_to_dmacindex)
330 		return -ENOMEM;
331 
332 	pf->flags |= OTX2_FLAG_DMACFLTR_SUPPORT;
333 
334 	return 0;
335 }
336 
337 void otx2_mcam_flow_del(struct otx2_nic *pf)
338 {
339 	otx2_destroy_mcam_flows(pf);
340 }
341 EXPORT_SYMBOL(otx2_mcam_flow_del);
342 
343 /*  On success adds mcam entry
344  *  On failure enable promisous mode
345  */
346 static int otx2_do_add_macfilter(struct otx2_nic *pf, const u8 *mac)
347 {
348 	struct otx2_flow_config *flow_cfg = pf->flow_cfg;
349 	struct npc_install_flow_req *req;
350 	int err, i;
351 
352 	if (!(pf->flags & OTX2_FLAG_UCAST_FLTR_SUPPORT))
353 		return -ENOMEM;
354 
355 	/* dont have free mcam entries or uc list is greater than alloted */
356 	if (netdev_uc_count(pf->netdev) > OTX2_MAX_UNICAST_FLOWS)
357 		return -ENOMEM;
358 
359 	mutex_lock(&pf->mbox.lock);
360 	req = otx2_mbox_alloc_msg_npc_install_flow(&pf->mbox);
361 	if (!req) {
362 		mutex_unlock(&pf->mbox.lock);
363 		return -ENOMEM;
364 	}
365 
366 	/* unicast offset starts with 32 0..31 for ntuple */
367 	for (i = 0; i <  OTX2_MAX_UNICAST_FLOWS; i++) {
368 		if (pf->mac_table[i].inuse)
369 			continue;
370 		ether_addr_copy(pf->mac_table[i].addr, mac);
371 		pf->mac_table[i].inuse = true;
372 		pf->mac_table[i].mcam_entry =
373 			flow_cfg->def_ent[i + flow_cfg->unicast_offset];
374 		req->entry =  pf->mac_table[i].mcam_entry;
375 		break;
376 	}
377 
378 	ether_addr_copy(req->packet.dmac, mac);
379 	eth_broadcast_addr((u8 *)&req->mask.dmac);
380 	req->features = BIT_ULL(NPC_DMAC);
381 	req->channel = pf->hw.rx_chan_base;
382 	req->intf = NIX_INTF_RX;
383 	req->op = NIX_RX_ACTION_DEFAULT;
384 	req->set_cntr = 1;
385 
386 	err = otx2_sync_mbox_msg(&pf->mbox);
387 	mutex_unlock(&pf->mbox.lock);
388 
389 	return err;
390 }
391 
392 int otx2_add_macfilter(struct net_device *netdev, const u8 *mac)
393 {
394 	struct otx2_nic *pf = netdev_priv(netdev);
395 
396 	if (!bitmap_empty(pf->flow_cfg->dmacflt_bmap,
397 			  pf->flow_cfg->dmacflt_max_flows))
398 		netdev_warn(netdev,
399 			    "Add %pM to CGX/RPM DMAC filters list as well\n",
400 			    mac);
401 
402 	return otx2_do_add_macfilter(pf, mac);
403 }
404 
405 static bool otx2_get_mcamentry_for_mac(struct otx2_nic *pf, const u8 *mac,
406 				       int *mcam_entry)
407 {
408 	int i;
409 
410 	for (i = 0; i < OTX2_MAX_UNICAST_FLOWS; i++) {
411 		if (!pf->mac_table[i].inuse)
412 			continue;
413 
414 		if (ether_addr_equal(pf->mac_table[i].addr, mac)) {
415 			*mcam_entry = pf->mac_table[i].mcam_entry;
416 			pf->mac_table[i].inuse = false;
417 			return true;
418 		}
419 	}
420 	return false;
421 }
422 
423 int otx2_del_macfilter(struct net_device *netdev, const u8 *mac)
424 {
425 	struct otx2_nic *pf = netdev_priv(netdev);
426 	struct npc_delete_flow_req *req;
427 	int err, mcam_entry;
428 
429 	/* check does mcam entry exists for given mac */
430 	if (!otx2_get_mcamentry_for_mac(pf, mac, &mcam_entry))
431 		return 0;
432 
433 	mutex_lock(&pf->mbox.lock);
434 	req = otx2_mbox_alloc_msg_npc_delete_flow(&pf->mbox);
435 	if (!req) {
436 		mutex_unlock(&pf->mbox.lock);
437 		return -ENOMEM;
438 	}
439 	req->entry = mcam_entry;
440 	/* Send message to AF */
441 	err = otx2_sync_mbox_msg(&pf->mbox);
442 	mutex_unlock(&pf->mbox.lock);
443 
444 	return err;
445 }
446 
447 static struct otx2_flow *otx2_find_flow(struct otx2_nic *pfvf, u32 location)
448 {
449 	struct otx2_flow *iter;
450 
451 	list_for_each_entry(iter, &pfvf->flow_cfg->flow_list, list) {
452 		if (iter->location == location)
453 			return iter;
454 	}
455 
456 	return NULL;
457 }
458 
459 static void otx2_add_flow_to_list(struct otx2_nic *pfvf, struct otx2_flow *flow)
460 {
461 	struct list_head *head = &pfvf->flow_cfg->flow_list;
462 	struct otx2_flow *iter;
463 
464 	list_for_each_entry(iter, &pfvf->flow_cfg->flow_list, list) {
465 		if (iter->location > flow->location)
466 			break;
467 		head = &iter->list;
468 	}
469 
470 	list_add(&flow->list, head);
471 }
472 
473 int otx2_get_maxflows(struct otx2_flow_config *flow_cfg)
474 {
475 	if (!flow_cfg)
476 		return 0;
477 
478 	if (flow_cfg->nr_flows == flow_cfg->max_flows ||
479 	    !bitmap_empty(flow_cfg->dmacflt_bmap,
480 			  flow_cfg->dmacflt_max_flows))
481 		return flow_cfg->max_flows + flow_cfg->dmacflt_max_flows;
482 	else
483 		return flow_cfg->max_flows;
484 }
485 EXPORT_SYMBOL(otx2_get_maxflows);
486 
487 int otx2_get_flow(struct otx2_nic *pfvf, struct ethtool_rxnfc *nfc,
488 		  u32 location)
489 {
490 	struct otx2_flow *iter;
491 
492 	if (location >= otx2_get_maxflows(pfvf->flow_cfg))
493 		return -EINVAL;
494 
495 	list_for_each_entry(iter, &pfvf->flow_cfg->flow_list, list) {
496 		if (iter->location == location) {
497 			nfc->fs = iter->flow_spec;
498 			nfc->rss_context = iter->rss_ctx_id;
499 			return 0;
500 		}
501 	}
502 
503 	return -ENOENT;
504 }
505 
506 int otx2_get_all_flows(struct otx2_nic *pfvf, struct ethtool_rxnfc *nfc,
507 		       u32 *rule_locs)
508 {
509 	u32 rule_cnt = nfc->rule_cnt;
510 	u32 location = 0;
511 	int idx = 0;
512 	int err = 0;
513 
514 	nfc->data = otx2_get_maxflows(pfvf->flow_cfg);
515 	while ((!err || err == -ENOENT) && idx < rule_cnt) {
516 		err = otx2_get_flow(pfvf, nfc, location);
517 		if (!err)
518 			rule_locs[idx++] = location;
519 		location++;
520 	}
521 	nfc->rule_cnt = rule_cnt;
522 
523 	return err;
524 }
525 
526 static int otx2_prepare_ipv4_flow(struct ethtool_rx_flow_spec *fsp,
527 				  struct npc_install_flow_req *req,
528 				  u32 flow_type)
529 {
530 	struct ethtool_usrip4_spec *ipv4_usr_mask = &fsp->m_u.usr_ip4_spec;
531 	struct ethtool_usrip4_spec *ipv4_usr_hdr = &fsp->h_u.usr_ip4_spec;
532 	struct ethtool_tcpip4_spec *ipv4_l4_mask = &fsp->m_u.tcp_ip4_spec;
533 	struct ethtool_tcpip4_spec *ipv4_l4_hdr = &fsp->h_u.tcp_ip4_spec;
534 	struct ethtool_ah_espip4_spec *ah_esp_hdr = &fsp->h_u.ah_ip4_spec;
535 	struct ethtool_ah_espip4_spec *ah_esp_mask = &fsp->m_u.ah_ip4_spec;
536 	struct flow_msg *pmask = &req->mask;
537 	struct flow_msg *pkt = &req->packet;
538 
539 	switch (flow_type) {
540 	case IP_USER_FLOW:
541 		if (ipv4_usr_mask->ip4src) {
542 			memcpy(&pkt->ip4src, &ipv4_usr_hdr->ip4src,
543 			       sizeof(pkt->ip4src));
544 			memcpy(&pmask->ip4src, &ipv4_usr_mask->ip4src,
545 			       sizeof(pmask->ip4src));
546 			req->features |= BIT_ULL(NPC_SIP_IPV4);
547 		}
548 		if (ipv4_usr_mask->ip4dst) {
549 			memcpy(&pkt->ip4dst, &ipv4_usr_hdr->ip4dst,
550 			       sizeof(pkt->ip4dst));
551 			memcpy(&pmask->ip4dst, &ipv4_usr_mask->ip4dst,
552 			       sizeof(pmask->ip4dst));
553 			req->features |= BIT_ULL(NPC_DIP_IPV4);
554 		}
555 		if (ipv4_usr_mask->tos) {
556 			pkt->tos = ipv4_usr_hdr->tos;
557 			pmask->tos = ipv4_usr_mask->tos;
558 			req->features |= BIT_ULL(NPC_TOS);
559 		}
560 		if (ipv4_usr_mask->proto) {
561 			switch (ipv4_usr_hdr->proto) {
562 			case IPPROTO_ICMP:
563 				req->features |= BIT_ULL(NPC_IPPROTO_ICMP);
564 				break;
565 			case IPPROTO_TCP:
566 				req->features |= BIT_ULL(NPC_IPPROTO_TCP);
567 				break;
568 			case IPPROTO_UDP:
569 				req->features |= BIT_ULL(NPC_IPPROTO_UDP);
570 				break;
571 			case IPPROTO_SCTP:
572 				req->features |= BIT_ULL(NPC_IPPROTO_SCTP);
573 				break;
574 			case IPPROTO_AH:
575 				req->features |= BIT_ULL(NPC_IPPROTO_AH);
576 				break;
577 			case IPPROTO_ESP:
578 				req->features |= BIT_ULL(NPC_IPPROTO_ESP);
579 				break;
580 			default:
581 				return -EOPNOTSUPP;
582 			}
583 		}
584 		pkt->etype = cpu_to_be16(ETH_P_IP);
585 		pmask->etype = cpu_to_be16(0xFFFF);
586 		req->features |= BIT_ULL(NPC_ETYPE);
587 		break;
588 	case TCP_V4_FLOW:
589 	case UDP_V4_FLOW:
590 	case SCTP_V4_FLOW:
591 		pkt->etype = cpu_to_be16(ETH_P_IP);
592 		pmask->etype = cpu_to_be16(0xFFFF);
593 		req->features |= BIT_ULL(NPC_ETYPE);
594 		if (ipv4_l4_mask->ip4src) {
595 			memcpy(&pkt->ip4src, &ipv4_l4_hdr->ip4src,
596 			       sizeof(pkt->ip4src));
597 			memcpy(&pmask->ip4src, &ipv4_l4_mask->ip4src,
598 			       sizeof(pmask->ip4src));
599 			req->features |= BIT_ULL(NPC_SIP_IPV4);
600 		}
601 		if (ipv4_l4_mask->ip4dst) {
602 			memcpy(&pkt->ip4dst, &ipv4_l4_hdr->ip4dst,
603 			       sizeof(pkt->ip4dst));
604 			memcpy(&pmask->ip4dst, &ipv4_l4_mask->ip4dst,
605 			       sizeof(pmask->ip4dst));
606 			req->features |= BIT_ULL(NPC_DIP_IPV4);
607 		}
608 		if (ipv4_l4_mask->tos) {
609 			pkt->tos = ipv4_l4_hdr->tos;
610 			pmask->tos = ipv4_l4_mask->tos;
611 			req->features |= BIT_ULL(NPC_TOS);
612 		}
613 		if (ipv4_l4_mask->psrc) {
614 			memcpy(&pkt->sport, &ipv4_l4_hdr->psrc,
615 			       sizeof(pkt->sport));
616 			memcpy(&pmask->sport, &ipv4_l4_mask->psrc,
617 			       sizeof(pmask->sport));
618 			if (flow_type == UDP_V4_FLOW)
619 				req->features |= BIT_ULL(NPC_SPORT_UDP);
620 			else if (flow_type == TCP_V4_FLOW)
621 				req->features |= BIT_ULL(NPC_SPORT_TCP);
622 			else
623 				req->features |= BIT_ULL(NPC_SPORT_SCTP);
624 		}
625 		if (ipv4_l4_mask->pdst) {
626 			memcpy(&pkt->dport, &ipv4_l4_hdr->pdst,
627 			       sizeof(pkt->dport));
628 			memcpy(&pmask->dport, &ipv4_l4_mask->pdst,
629 			       sizeof(pmask->dport));
630 			if (flow_type == UDP_V4_FLOW)
631 				req->features |= BIT_ULL(NPC_DPORT_UDP);
632 			else if (flow_type == TCP_V4_FLOW)
633 				req->features |= BIT_ULL(NPC_DPORT_TCP);
634 			else
635 				req->features |= BIT_ULL(NPC_DPORT_SCTP);
636 		}
637 		if (flow_type == UDP_V4_FLOW)
638 			req->features |= BIT_ULL(NPC_IPPROTO_UDP);
639 		else if (flow_type == TCP_V4_FLOW)
640 			req->features |= BIT_ULL(NPC_IPPROTO_TCP);
641 		else
642 			req->features |= BIT_ULL(NPC_IPPROTO_SCTP);
643 		break;
644 	case AH_V4_FLOW:
645 	case ESP_V4_FLOW:
646 		pkt->etype = cpu_to_be16(ETH_P_IP);
647 		pmask->etype = cpu_to_be16(0xFFFF);
648 		req->features |= BIT_ULL(NPC_ETYPE);
649 		if (ah_esp_mask->ip4src) {
650 			memcpy(&pkt->ip4src, &ah_esp_hdr->ip4src,
651 			       sizeof(pkt->ip4src));
652 			memcpy(&pmask->ip4src, &ah_esp_mask->ip4src,
653 			       sizeof(pmask->ip4src));
654 			req->features |= BIT_ULL(NPC_SIP_IPV4);
655 		}
656 		if (ah_esp_mask->ip4dst) {
657 			memcpy(&pkt->ip4dst, &ah_esp_hdr->ip4dst,
658 			       sizeof(pkt->ip4dst));
659 			memcpy(&pmask->ip4dst, &ah_esp_mask->ip4dst,
660 			       sizeof(pmask->ip4dst));
661 			req->features |= BIT_ULL(NPC_DIP_IPV4);
662 		}
663 		if (ah_esp_mask->tos) {
664 			pkt->tos = ah_esp_hdr->tos;
665 			pmask->tos = ah_esp_mask->tos;
666 			req->features |= BIT_ULL(NPC_TOS);
667 		}
668 
669 		/* NPC profile doesn't extract AH/ESP header fields */
670 		if (ah_esp_mask->spi & ah_esp_hdr->spi)
671 			return -EOPNOTSUPP;
672 
673 		if (flow_type == AH_V4_FLOW)
674 			req->features |= BIT_ULL(NPC_IPPROTO_AH);
675 		else
676 			req->features |= BIT_ULL(NPC_IPPROTO_ESP);
677 		break;
678 	default:
679 		break;
680 	}
681 
682 	return 0;
683 }
684 
685 static int otx2_prepare_ipv6_flow(struct ethtool_rx_flow_spec *fsp,
686 				  struct npc_install_flow_req *req,
687 				  u32 flow_type)
688 {
689 	struct ethtool_usrip6_spec *ipv6_usr_mask = &fsp->m_u.usr_ip6_spec;
690 	struct ethtool_usrip6_spec *ipv6_usr_hdr = &fsp->h_u.usr_ip6_spec;
691 	struct ethtool_tcpip6_spec *ipv6_l4_mask = &fsp->m_u.tcp_ip6_spec;
692 	struct ethtool_tcpip6_spec *ipv6_l4_hdr = &fsp->h_u.tcp_ip6_spec;
693 	struct ethtool_ah_espip6_spec *ah_esp_hdr = &fsp->h_u.ah_ip6_spec;
694 	struct ethtool_ah_espip6_spec *ah_esp_mask = &fsp->m_u.ah_ip6_spec;
695 	struct flow_msg *pmask = &req->mask;
696 	struct flow_msg *pkt = &req->packet;
697 
698 	switch (flow_type) {
699 	case IPV6_USER_FLOW:
700 		if (!ipv6_addr_any((struct in6_addr *)ipv6_usr_mask->ip6src)) {
701 			memcpy(&pkt->ip6src, &ipv6_usr_hdr->ip6src,
702 			       sizeof(pkt->ip6src));
703 			memcpy(&pmask->ip6src, &ipv6_usr_mask->ip6src,
704 			       sizeof(pmask->ip6src));
705 			req->features |= BIT_ULL(NPC_SIP_IPV6);
706 		}
707 		if (!ipv6_addr_any((struct in6_addr *)ipv6_usr_mask->ip6dst)) {
708 			memcpy(&pkt->ip6dst, &ipv6_usr_hdr->ip6dst,
709 			       sizeof(pkt->ip6dst));
710 			memcpy(&pmask->ip6dst, &ipv6_usr_mask->ip6dst,
711 			       sizeof(pmask->ip6dst));
712 			req->features |= BIT_ULL(NPC_DIP_IPV6);
713 		}
714 		if (ipv6_usr_hdr->l4_proto == IPPROTO_FRAGMENT) {
715 			pkt->next_header = ipv6_usr_hdr->l4_proto;
716 			pmask->next_header = ipv6_usr_mask->l4_proto;
717 			req->features |= BIT_ULL(NPC_IPFRAG_IPV6);
718 		}
719 		pkt->etype = cpu_to_be16(ETH_P_IPV6);
720 		pmask->etype = cpu_to_be16(0xFFFF);
721 		req->features |= BIT_ULL(NPC_ETYPE);
722 		break;
723 	case TCP_V6_FLOW:
724 	case UDP_V6_FLOW:
725 	case SCTP_V6_FLOW:
726 		pkt->etype = cpu_to_be16(ETH_P_IPV6);
727 		pmask->etype = cpu_to_be16(0xFFFF);
728 		req->features |= BIT_ULL(NPC_ETYPE);
729 		if (!ipv6_addr_any((struct in6_addr *)ipv6_l4_mask->ip6src)) {
730 			memcpy(&pkt->ip6src, &ipv6_l4_hdr->ip6src,
731 			       sizeof(pkt->ip6src));
732 			memcpy(&pmask->ip6src, &ipv6_l4_mask->ip6src,
733 			       sizeof(pmask->ip6src));
734 			req->features |= BIT_ULL(NPC_SIP_IPV6);
735 		}
736 		if (!ipv6_addr_any((struct in6_addr *)ipv6_l4_mask->ip6dst)) {
737 			memcpy(&pkt->ip6dst, &ipv6_l4_hdr->ip6dst,
738 			       sizeof(pkt->ip6dst));
739 			memcpy(&pmask->ip6dst, &ipv6_l4_mask->ip6dst,
740 			       sizeof(pmask->ip6dst));
741 			req->features |= BIT_ULL(NPC_DIP_IPV6);
742 		}
743 		if (ipv6_l4_mask->psrc) {
744 			memcpy(&pkt->sport, &ipv6_l4_hdr->psrc,
745 			       sizeof(pkt->sport));
746 			memcpy(&pmask->sport, &ipv6_l4_mask->psrc,
747 			       sizeof(pmask->sport));
748 			if (flow_type == UDP_V6_FLOW)
749 				req->features |= BIT_ULL(NPC_SPORT_UDP);
750 			else if (flow_type == TCP_V6_FLOW)
751 				req->features |= BIT_ULL(NPC_SPORT_TCP);
752 			else
753 				req->features |= BIT_ULL(NPC_SPORT_SCTP);
754 		}
755 		if (ipv6_l4_mask->pdst) {
756 			memcpy(&pkt->dport, &ipv6_l4_hdr->pdst,
757 			       sizeof(pkt->dport));
758 			memcpy(&pmask->dport, &ipv6_l4_mask->pdst,
759 			       sizeof(pmask->dport));
760 			if (flow_type == UDP_V6_FLOW)
761 				req->features |= BIT_ULL(NPC_DPORT_UDP);
762 			else if (flow_type == TCP_V6_FLOW)
763 				req->features |= BIT_ULL(NPC_DPORT_TCP);
764 			else
765 				req->features |= BIT_ULL(NPC_DPORT_SCTP);
766 		}
767 		if (flow_type == UDP_V6_FLOW)
768 			req->features |= BIT_ULL(NPC_IPPROTO_UDP);
769 		else if (flow_type == TCP_V6_FLOW)
770 			req->features |= BIT_ULL(NPC_IPPROTO_TCP);
771 		else
772 			req->features |= BIT_ULL(NPC_IPPROTO_SCTP);
773 		break;
774 	case AH_V6_FLOW:
775 	case ESP_V6_FLOW:
776 		pkt->etype = cpu_to_be16(ETH_P_IPV6);
777 		pmask->etype = cpu_to_be16(0xFFFF);
778 		req->features |= BIT_ULL(NPC_ETYPE);
779 		if (!ipv6_addr_any((struct in6_addr *)ah_esp_hdr->ip6src)) {
780 			memcpy(&pkt->ip6src, &ah_esp_hdr->ip6src,
781 			       sizeof(pkt->ip6src));
782 			memcpy(&pmask->ip6src, &ah_esp_mask->ip6src,
783 			       sizeof(pmask->ip6src));
784 			req->features |= BIT_ULL(NPC_SIP_IPV6);
785 		}
786 		if (!ipv6_addr_any((struct in6_addr *)ah_esp_hdr->ip6dst)) {
787 			memcpy(&pkt->ip6dst, &ah_esp_hdr->ip6dst,
788 			       sizeof(pkt->ip6dst));
789 			memcpy(&pmask->ip6dst, &ah_esp_mask->ip6dst,
790 			       sizeof(pmask->ip6dst));
791 			req->features |= BIT_ULL(NPC_DIP_IPV6);
792 		}
793 
794 		/* NPC profile doesn't extract AH/ESP header fields */
795 		if ((ah_esp_mask->spi & ah_esp_hdr->spi) ||
796 		    (ah_esp_mask->tclass & ah_esp_hdr->tclass))
797 			return -EOPNOTSUPP;
798 
799 		if (flow_type == AH_V6_FLOW)
800 			req->features |= BIT_ULL(NPC_IPPROTO_AH);
801 		else
802 			req->features |= BIT_ULL(NPC_IPPROTO_ESP);
803 		break;
804 	default:
805 		break;
806 	}
807 
808 	return 0;
809 }
810 
811 static int otx2_prepare_flow_request(struct ethtool_rx_flow_spec *fsp,
812 			      struct npc_install_flow_req *req)
813 {
814 	struct ethhdr *eth_mask = &fsp->m_u.ether_spec;
815 	struct ethhdr *eth_hdr = &fsp->h_u.ether_spec;
816 	struct flow_msg *pmask = &req->mask;
817 	struct flow_msg *pkt = &req->packet;
818 	u32 flow_type;
819 	int ret;
820 
821 	flow_type = fsp->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS);
822 	switch (flow_type) {
823 	/* bits not set in mask are don't care */
824 	case ETHER_FLOW:
825 		if (!is_zero_ether_addr(eth_mask->h_source)) {
826 			ether_addr_copy(pkt->smac, eth_hdr->h_source);
827 			ether_addr_copy(pmask->smac, eth_mask->h_source);
828 			req->features |= BIT_ULL(NPC_SMAC);
829 		}
830 		if (!is_zero_ether_addr(eth_mask->h_dest)) {
831 			ether_addr_copy(pkt->dmac, eth_hdr->h_dest);
832 			ether_addr_copy(pmask->dmac, eth_mask->h_dest);
833 			req->features |= BIT_ULL(NPC_DMAC);
834 		}
835 		if (eth_hdr->h_proto) {
836 			memcpy(&pkt->etype, &eth_hdr->h_proto,
837 			       sizeof(pkt->etype));
838 			memcpy(&pmask->etype, &eth_mask->h_proto,
839 			       sizeof(pmask->etype));
840 			req->features |= BIT_ULL(NPC_ETYPE);
841 		}
842 		break;
843 	case IP_USER_FLOW:
844 	case TCP_V4_FLOW:
845 	case UDP_V4_FLOW:
846 	case SCTP_V4_FLOW:
847 	case AH_V4_FLOW:
848 	case ESP_V4_FLOW:
849 		ret = otx2_prepare_ipv4_flow(fsp, req, flow_type);
850 		if (ret)
851 			return ret;
852 		break;
853 	case IPV6_USER_FLOW:
854 	case TCP_V6_FLOW:
855 	case UDP_V6_FLOW:
856 	case SCTP_V6_FLOW:
857 	case AH_V6_FLOW:
858 	case ESP_V6_FLOW:
859 		ret = otx2_prepare_ipv6_flow(fsp, req, flow_type);
860 		if (ret)
861 			return ret;
862 		break;
863 	default:
864 		return -EOPNOTSUPP;
865 	}
866 	if (fsp->flow_type & FLOW_EXT) {
867 		u16 vlan_etype;
868 
869 		if (fsp->m_ext.vlan_etype) {
870 			/* Partial masks not supported */
871 			if (be16_to_cpu(fsp->m_ext.vlan_etype) != 0xFFFF)
872 				return -EINVAL;
873 
874 			vlan_etype = be16_to_cpu(fsp->h_ext.vlan_etype);
875 			/* Only ETH_P_8021Q and ETH_P_802AD types supported */
876 			if (vlan_etype != ETH_P_8021Q &&
877 			    vlan_etype != ETH_P_8021AD)
878 				return -EINVAL;
879 
880 			memcpy(&pkt->vlan_etype, &fsp->h_ext.vlan_etype,
881 			       sizeof(pkt->vlan_etype));
882 			memcpy(&pmask->vlan_etype, &fsp->m_ext.vlan_etype,
883 			       sizeof(pmask->vlan_etype));
884 
885 			if (vlan_etype == ETH_P_8021Q)
886 				req->features |= BIT_ULL(NPC_VLAN_ETYPE_CTAG);
887 			else
888 				req->features |= BIT_ULL(NPC_VLAN_ETYPE_STAG);
889 		}
890 
891 		if (fsp->m_ext.vlan_tci) {
892 			memcpy(&pkt->vlan_tci, &fsp->h_ext.vlan_tci,
893 			       sizeof(pkt->vlan_tci));
894 			memcpy(&pmask->vlan_tci, &fsp->m_ext.vlan_tci,
895 			       sizeof(pmask->vlan_tci));
896 			req->features |= BIT_ULL(NPC_OUTER_VID);
897 		}
898 
899 		if (fsp->m_ext.data[1]) {
900 			if (flow_type == IP_USER_FLOW) {
901 				if (be32_to_cpu(fsp->h_ext.data[1]) != IPV4_FLAG_MORE)
902 					return -EINVAL;
903 
904 				pkt->ip_flag = be32_to_cpu(fsp->h_ext.data[1]);
905 				pmask->ip_flag = be32_to_cpu(fsp->m_ext.data[1]);
906 				req->features |= BIT_ULL(NPC_IPFRAG_IPV4);
907 			} else if (fsp->h_ext.data[1] ==
908 					cpu_to_be32(OTX2_DEFAULT_ACTION)) {
909 				/* Not Drop/Direct to queue but use action
910 				 * in default entry
911 				 */
912 				req->op = NIX_RX_ACTION_DEFAULT;
913 			}
914 		}
915 	}
916 
917 	if (fsp->flow_type & FLOW_MAC_EXT &&
918 	    !is_zero_ether_addr(fsp->m_ext.h_dest)) {
919 		ether_addr_copy(pkt->dmac, fsp->h_ext.h_dest);
920 		ether_addr_copy(pmask->dmac, fsp->m_ext.h_dest);
921 		req->features |= BIT_ULL(NPC_DMAC);
922 	}
923 
924 	if (!req->features)
925 		return -EOPNOTSUPP;
926 
927 	return 0;
928 }
929 
930 static int otx2_is_flow_rule_dmacfilter(struct otx2_nic *pfvf,
931 					struct ethtool_rx_flow_spec *fsp)
932 {
933 	struct ethhdr *eth_mask = &fsp->m_u.ether_spec;
934 	struct ethhdr *eth_hdr = &fsp->h_u.ether_spec;
935 	u64 ring_cookie = fsp->ring_cookie;
936 	u32 flow_type;
937 
938 	if (!(pfvf->flags & OTX2_FLAG_DMACFLTR_SUPPORT))
939 		return false;
940 
941 	flow_type = fsp->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS);
942 
943 	/* CGX/RPM block dmac filtering configured for white listing
944 	 * check for action other than DROP
945 	 */
946 	if (flow_type == ETHER_FLOW && ring_cookie != RX_CLS_FLOW_DISC &&
947 	    !ethtool_get_flow_spec_ring_vf(ring_cookie)) {
948 		if (is_zero_ether_addr(eth_mask->h_dest) &&
949 		    is_valid_ether_addr(eth_hdr->h_dest))
950 			return true;
951 	}
952 
953 	return false;
954 }
955 
956 static int otx2_add_flow_msg(struct otx2_nic *pfvf, struct otx2_flow *flow)
957 {
958 	u64 ring_cookie = flow->flow_spec.ring_cookie;
959 #ifdef CONFIG_DCB
960 	int vlan_prio, qidx, pfc_rule = 0;
961 #endif
962 	struct npc_install_flow_req *req;
963 	int err, vf = 0;
964 
965 	mutex_lock(&pfvf->mbox.lock);
966 	req = otx2_mbox_alloc_msg_npc_install_flow(&pfvf->mbox);
967 	if (!req) {
968 		mutex_unlock(&pfvf->mbox.lock);
969 		return -ENOMEM;
970 	}
971 
972 	err = otx2_prepare_flow_request(&flow->flow_spec, req);
973 	if (err) {
974 		/* free the allocated msg above */
975 		otx2_mbox_reset(&pfvf->mbox.mbox, 0);
976 		mutex_unlock(&pfvf->mbox.lock);
977 		return err;
978 	}
979 
980 	req->entry = flow->entry;
981 	req->intf = NIX_INTF_RX;
982 	req->set_cntr = 1;
983 	req->channel = pfvf->hw.rx_chan_base;
984 	if (ring_cookie == RX_CLS_FLOW_DISC) {
985 		req->op = NIX_RX_ACTIONOP_DROP;
986 	} else {
987 		/* change to unicast only if action of default entry is not
988 		 * requested by user
989 		 */
990 		if (flow->flow_spec.flow_type & FLOW_RSS) {
991 			req->op = NIX_RX_ACTIONOP_RSS;
992 			req->index = flow->rss_ctx_id;
993 			req->flow_key_alg = pfvf->hw.flowkey_alg_idx;
994 		} else {
995 			req->op = NIX_RX_ACTIONOP_UCAST;
996 			req->index = ethtool_get_flow_spec_ring(ring_cookie);
997 		}
998 		vf = ethtool_get_flow_spec_ring_vf(ring_cookie);
999 		if (vf > pci_num_vf(pfvf->pdev)) {
1000 			mutex_unlock(&pfvf->mbox.lock);
1001 			return -EINVAL;
1002 		}
1003 
1004 #ifdef CONFIG_DCB
1005 		/* Identify PFC rule if PFC enabled and ntuple rule is vlan */
1006 		if (!vf && (req->features & BIT_ULL(NPC_OUTER_VID)) &&
1007 		    pfvf->pfc_en && req->op != NIX_RX_ACTIONOP_RSS) {
1008 			vlan_prio = ntohs(req->packet.vlan_tci) &
1009 				    ntohs(req->mask.vlan_tci);
1010 
1011 			/* Get the priority */
1012 			vlan_prio >>= 13;
1013 			flow->rule_type |= PFC_FLOWCTRL_RULE;
1014 			/* Check if PFC enabled for this priority */
1015 			if (pfvf->pfc_en & BIT(vlan_prio)) {
1016 				pfc_rule = true;
1017 				qidx = req->index;
1018 			}
1019 		}
1020 #endif
1021 	}
1022 
1023 	/* ethtool ring_cookie has (VF + 1) for VF */
1024 	if (vf) {
1025 		req->vf = vf;
1026 		flow->is_vf = true;
1027 		flow->vf = vf;
1028 	}
1029 
1030 	/* Send message to AF */
1031 	err = otx2_sync_mbox_msg(&pfvf->mbox);
1032 
1033 #ifdef CONFIG_DCB
1034 	if (!err && pfc_rule)
1035 		otx2_update_bpid_in_rqctx(pfvf, vlan_prio, qidx, true);
1036 #endif
1037 
1038 	mutex_unlock(&pfvf->mbox.lock);
1039 	return err;
1040 }
1041 
1042 static int otx2_add_flow_with_pfmac(struct otx2_nic *pfvf,
1043 				    struct otx2_flow *flow)
1044 {
1045 	struct otx2_flow *pf_mac;
1046 	struct ethhdr *eth_hdr;
1047 
1048 	pf_mac = kzalloc(sizeof(*pf_mac), GFP_KERNEL);
1049 	if (!pf_mac)
1050 		return -ENOMEM;
1051 
1052 	pf_mac->entry = 0;
1053 	pf_mac->rule_type |= DMAC_FILTER_RULE;
1054 	pf_mac->location = pfvf->flow_cfg->max_flows;
1055 	memcpy(&pf_mac->flow_spec, &flow->flow_spec,
1056 	       sizeof(struct ethtool_rx_flow_spec));
1057 	pf_mac->flow_spec.location = pf_mac->location;
1058 
1059 	/* Copy PF mac address */
1060 	eth_hdr = &pf_mac->flow_spec.h_u.ether_spec;
1061 	ether_addr_copy(eth_hdr->h_dest, pfvf->netdev->dev_addr);
1062 
1063 	/* Install DMAC filter with PF mac address */
1064 	otx2_dmacflt_add(pfvf, eth_hdr->h_dest, 0);
1065 
1066 	otx2_add_flow_to_list(pfvf, pf_mac);
1067 	pfvf->flow_cfg->nr_flows++;
1068 	set_bit(0, pfvf->flow_cfg->dmacflt_bmap);
1069 
1070 	return 0;
1071 }
1072 
1073 int otx2_add_flow(struct otx2_nic *pfvf, struct ethtool_rxnfc *nfc)
1074 {
1075 	struct otx2_flow_config *flow_cfg = pfvf->flow_cfg;
1076 	struct ethtool_rx_flow_spec *fsp = &nfc->fs;
1077 	struct otx2_flow *flow;
1078 	struct ethhdr *eth_hdr;
1079 	bool new = false;
1080 	int err = 0;
1081 	u32 ring;
1082 
1083 	if (!flow_cfg->max_flows) {
1084 		netdev_err(pfvf->netdev,
1085 			   "Ntuple rule count is 0, allocate and retry\n");
1086 		return -EINVAL;
1087 	}
1088 
1089 	ring = ethtool_get_flow_spec_ring(fsp->ring_cookie);
1090 	if (!(pfvf->flags & OTX2_FLAG_NTUPLE_SUPPORT))
1091 		return -ENOMEM;
1092 
1093 	if (ring >= pfvf->hw.rx_queues && fsp->ring_cookie != RX_CLS_FLOW_DISC)
1094 		return -EINVAL;
1095 
1096 	if (fsp->location >= otx2_get_maxflows(flow_cfg))
1097 		return -EINVAL;
1098 
1099 	flow = otx2_find_flow(pfvf, fsp->location);
1100 	if (!flow) {
1101 		flow = kzalloc(sizeof(*flow), GFP_KERNEL);
1102 		if (!flow)
1103 			return -ENOMEM;
1104 		flow->location = fsp->location;
1105 		flow->entry = flow_cfg->flow_ent[flow->location];
1106 		new = true;
1107 	}
1108 	/* struct copy */
1109 	flow->flow_spec = *fsp;
1110 
1111 	if (fsp->flow_type & FLOW_RSS)
1112 		flow->rss_ctx_id = nfc->rss_context;
1113 
1114 	if (otx2_is_flow_rule_dmacfilter(pfvf, &flow->flow_spec)) {
1115 		eth_hdr = &flow->flow_spec.h_u.ether_spec;
1116 
1117 		/* Sync dmac filter table with updated fields */
1118 		if (flow->rule_type & DMAC_FILTER_RULE)
1119 			return otx2_dmacflt_update(pfvf, eth_hdr->h_dest,
1120 						   flow->entry);
1121 
1122 		if (bitmap_full(flow_cfg->dmacflt_bmap,
1123 				flow_cfg->dmacflt_max_flows)) {
1124 			netdev_warn(pfvf->netdev,
1125 				    "Can't insert the rule %d as max allowed dmac filters are %d\n",
1126 				    flow->location +
1127 				    flow_cfg->dmacflt_max_flows,
1128 				    flow_cfg->dmacflt_max_flows);
1129 			err = -EINVAL;
1130 			if (new)
1131 				kfree(flow);
1132 			return err;
1133 		}
1134 
1135 		/* Install PF mac address to DMAC filter list */
1136 		if (!test_bit(0, flow_cfg->dmacflt_bmap))
1137 			otx2_add_flow_with_pfmac(pfvf, flow);
1138 
1139 		flow->rule_type |= DMAC_FILTER_RULE;
1140 		flow->entry = find_first_zero_bit(flow_cfg->dmacflt_bmap,
1141 						  flow_cfg->dmacflt_max_flows);
1142 		fsp->location = flow_cfg->max_flows + flow->entry;
1143 		flow->flow_spec.location = fsp->location;
1144 		flow->location = fsp->location;
1145 
1146 		set_bit(flow->entry, flow_cfg->dmacflt_bmap);
1147 		otx2_dmacflt_add(pfvf, eth_hdr->h_dest, flow->entry);
1148 
1149 	} else {
1150 		if (flow->location >= pfvf->flow_cfg->max_flows) {
1151 			netdev_warn(pfvf->netdev,
1152 				    "Can't insert non dmac ntuple rule at %d, allowed range %d-0\n",
1153 				    flow->location,
1154 				    flow_cfg->max_flows - 1);
1155 			err = -EINVAL;
1156 		} else {
1157 			err = otx2_add_flow_msg(pfvf, flow);
1158 		}
1159 	}
1160 
1161 	if (err) {
1162 		if (err == MBOX_MSG_INVALID)
1163 			err = -EINVAL;
1164 		if (new)
1165 			kfree(flow);
1166 		return err;
1167 	}
1168 
1169 	/* add the new flow installed to list */
1170 	if (new) {
1171 		otx2_add_flow_to_list(pfvf, flow);
1172 		flow_cfg->nr_flows++;
1173 	}
1174 
1175 	return 0;
1176 }
1177 
1178 static int otx2_remove_flow_msg(struct otx2_nic *pfvf, u16 entry, bool all)
1179 {
1180 	struct npc_delete_flow_req *req;
1181 	int err;
1182 
1183 	mutex_lock(&pfvf->mbox.lock);
1184 	req = otx2_mbox_alloc_msg_npc_delete_flow(&pfvf->mbox);
1185 	if (!req) {
1186 		mutex_unlock(&pfvf->mbox.lock);
1187 		return -ENOMEM;
1188 	}
1189 
1190 	req->entry = entry;
1191 	if (all)
1192 		req->all = 1;
1193 
1194 	/* Send message to AF */
1195 	err = otx2_sync_mbox_msg(&pfvf->mbox);
1196 	mutex_unlock(&pfvf->mbox.lock);
1197 	return err;
1198 }
1199 
1200 static void otx2_update_rem_pfmac(struct otx2_nic *pfvf, int req)
1201 {
1202 	struct otx2_flow *iter;
1203 	struct ethhdr *eth_hdr;
1204 	bool found = false;
1205 
1206 	list_for_each_entry(iter, &pfvf->flow_cfg->flow_list, list) {
1207 		if ((iter->rule_type & DMAC_FILTER_RULE) && iter->entry == 0) {
1208 			eth_hdr = &iter->flow_spec.h_u.ether_spec;
1209 			if (req == DMAC_ADDR_DEL) {
1210 				otx2_dmacflt_remove(pfvf, eth_hdr->h_dest,
1211 						    0);
1212 				clear_bit(0, pfvf->flow_cfg->dmacflt_bmap);
1213 				found = true;
1214 			} else {
1215 				ether_addr_copy(eth_hdr->h_dest,
1216 						pfvf->netdev->dev_addr);
1217 
1218 				otx2_dmacflt_update(pfvf, eth_hdr->h_dest, 0);
1219 			}
1220 			break;
1221 		}
1222 	}
1223 
1224 	if (found) {
1225 		list_del(&iter->list);
1226 		kfree(iter);
1227 		pfvf->flow_cfg->nr_flows--;
1228 	}
1229 }
1230 
1231 int otx2_remove_flow(struct otx2_nic *pfvf, u32 location)
1232 {
1233 	struct otx2_flow_config *flow_cfg = pfvf->flow_cfg;
1234 	struct otx2_flow *flow;
1235 	int err;
1236 
1237 	if (location >= otx2_get_maxflows(flow_cfg))
1238 		return -EINVAL;
1239 
1240 	flow = otx2_find_flow(pfvf, location);
1241 	if (!flow)
1242 		return -ENOENT;
1243 
1244 	if (flow->rule_type & DMAC_FILTER_RULE) {
1245 		struct ethhdr *eth_hdr = &flow->flow_spec.h_u.ether_spec;
1246 
1247 		/* user not allowed to remove dmac filter with interface mac */
1248 		if (ether_addr_equal(pfvf->netdev->dev_addr, eth_hdr->h_dest))
1249 			return -EPERM;
1250 
1251 		err = otx2_dmacflt_remove(pfvf, eth_hdr->h_dest,
1252 					  flow->entry);
1253 		clear_bit(flow->entry, flow_cfg->dmacflt_bmap);
1254 		/* If all dmac filters are removed delete macfilter with
1255 		 * interface mac address and configure CGX/RPM block in
1256 		 * promiscuous mode
1257 		 */
1258 		if (bitmap_weight(flow_cfg->dmacflt_bmap,
1259 				  flow_cfg->dmacflt_max_flows) == 1)
1260 			otx2_update_rem_pfmac(pfvf, DMAC_ADDR_DEL);
1261 	} else {
1262 #ifdef CONFIG_DCB
1263 		if (flow->rule_type & PFC_FLOWCTRL_RULE)
1264 			otx2_update_bpid_in_rqctx(pfvf, 0,
1265 						  flow->flow_spec.ring_cookie,
1266 						  false);
1267 #endif
1268 
1269 		err = otx2_remove_flow_msg(pfvf, flow->entry, false);
1270 	}
1271 
1272 	if (err)
1273 		return err;
1274 
1275 	list_del(&flow->list);
1276 	kfree(flow);
1277 	flow_cfg->nr_flows--;
1278 
1279 	return 0;
1280 }
1281 
1282 void otx2_rss_ctx_flow_del(struct otx2_nic *pfvf, int ctx_id)
1283 {
1284 	struct otx2_flow *flow, *tmp;
1285 	int err;
1286 
1287 	list_for_each_entry_safe(flow, tmp, &pfvf->flow_cfg->flow_list, list) {
1288 		if (flow->rss_ctx_id != ctx_id)
1289 			continue;
1290 		err = otx2_remove_flow(pfvf, flow->location);
1291 		if (err)
1292 			netdev_warn(pfvf->netdev,
1293 				    "Can't delete the rule %d associated with this rss group err:%d",
1294 				    flow->location, err);
1295 	}
1296 }
1297 
1298 int otx2_destroy_ntuple_flows(struct otx2_nic *pfvf)
1299 {
1300 	struct otx2_flow_config *flow_cfg = pfvf->flow_cfg;
1301 	struct npc_delete_flow_req *req;
1302 	struct otx2_flow *iter, *tmp;
1303 	int err;
1304 
1305 	if (!(pfvf->flags & OTX2_FLAG_NTUPLE_SUPPORT))
1306 		return 0;
1307 
1308 	if (!flow_cfg->max_flows)
1309 		return 0;
1310 
1311 	mutex_lock(&pfvf->mbox.lock);
1312 	req = otx2_mbox_alloc_msg_npc_delete_flow(&pfvf->mbox);
1313 	if (!req) {
1314 		mutex_unlock(&pfvf->mbox.lock);
1315 		return -ENOMEM;
1316 	}
1317 
1318 	req->start = flow_cfg->flow_ent[0];
1319 	req->end   = flow_cfg->flow_ent[flow_cfg->max_flows - 1];
1320 	err = otx2_sync_mbox_msg(&pfvf->mbox);
1321 	mutex_unlock(&pfvf->mbox.lock);
1322 
1323 	list_for_each_entry_safe(iter, tmp, &flow_cfg->flow_list, list) {
1324 		list_del(&iter->list);
1325 		kfree(iter);
1326 		flow_cfg->nr_flows--;
1327 	}
1328 	return err;
1329 }
1330 
1331 int otx2_destroy_mcam_flows(struct otx2_nic *pfvf)
1332 {
1333 	struct otx2_flow_config *flow_cfg = pfvf->flow_cfg;
1334 	struct npc_mcam_free_entry_req *req;
1335 	struct otx2_flow *iter, *tmp;
1336 	int err;
1337 
1338 	if (!(pfvf->flags & OTX2_FLAG_MCAM_ENTRIES_ALLOC))
1339 		return 0;
1340 
1341 	/* remove all flows */
1342 	err = otx2_remove_flow_msg(pfvf, 0, true);
1343 	if (err)
1344 		return err;
1345 
1346 	list_for_each_entry_safe(iter, tmp, &flow_cfg->flow_list, list) {
1347 		list_del(&iter->list);
1348 		kfree(iter);
1349 		flow_cfg->nr_flows--;
1350 	}
1351 
1352 	mutex_lock(&pfvf->mbox.lock);
1353 	req = otx2_mbox_alloc_msg_npc_mcam_free_entry(&pfvf->mbox);
1354 	if (!req) {
1355 		mutex_unlock(&pfvf->mbox.lock);
1356 		return -ENOMEM;
1357 	}
1358 
1359 	req->all = 1;
1360 	/* Send message to AF to free MCAM entries */
1361 	err = otx2_sync_mbox_msg(&pfvf->mbox);
1362 	if (err) {
1363 		mutex_unlock(&pfvf->mbox.lock);
1364 		return err;
1365 	}
1366 
1367 	pfvf->flags &= ~OTX2_FLAG_MCAM_ENTRIES_ALLOC;
1368 	mutex_unlock(&pfvf->mbox.lock);
1369 
1370 	return 0;
1371 }
1372 
1373 int otx2_install_rxvlan_offload_flow(struct otx2_nic *pfvf)
1374 {
1375 	struct otx2_flow_config *flow_cfg = pfvf->flow_cfg;
1376 	struct npc_install_flow_req *req;
1377 	int err;
1378 
1379 	mutex_lock(&pfvf->mbox.lock);
1380 	req = otx2_mbox_alloc_msg_npc_install_flow(&pfvf->mbox);
1381 	if (!req) {
1382 		mutex_unlock(&pfvf->mbox.lock);
1383 		return -ENOMEM;
1384 	}
1385 
1386 	req->entry = flow_cfg->def_ent[flow_cfg->rx_vlan_offset];
1387 	req->intf = NIX_INTF_RX;
1388 	ether_addr_copy(req->packet.dmac, pfvf->netdev->dev_addr);
1389 	eth_broadcast_addr((u8 *)&req->mask.dmac);
1390 	req->channel = pfvf->hw.rx_chan_base;
1391 	req->op = NIX_RX_ACTION_DEFAULT;
1392 	req->features = BIT_ULL(NPC_OUTER_VID) | BIT_ULL(NPC_DMAC);
1393 	req->vtag0_valid = true;
1394 	req->vtag0_type = NIX_AF_LFX_RX_VTAG_TYPE0;
1395 
1396 	/* Send message to AF */
1397 	err = otx2_sync_mbox_msg(&pfvf->mbox);
1398 	mutex_unlock(&pfvf->mbox.lock);
1399 	return err;
1400 }
1401 
1402 static int otx2_delete_rxvlan_offload_flow(struct otx2_nic *pfvf)
1403 {
1404 	struct otx2_flow_config *flow_cfg = pfvf->flow_cfg;
1405 	struct npc_delete_flow_req *req;
1406 	int err;
1407 
1408 	mutex_lock(&pfvf->mbox.lock);
1409 	req = otx2_mbox_alloc_msg_npc_delete_flow(&pfvf->mbox);
1410 	if (!req) {
1411 		mutex_unlock(&pfvf->mbox.lock);
1412 		return -ENOMEM;
1413 	}
1414 
1415 	req->entry = flow_cfg->def_ent[flow_cfg->rx_vlan_offset];
1416 	/* Send message to AF */
1417 	err = otx2_sync_mbox_msg(&pfvf->mbox);
1418 	mutex_unlock(&pfvf->mbox.lock);
1419 	return err;
1420 }
1421 
1422 int otx2_enable_rxvlan(struct otx2_nic *pf, bool enable)
1423 {
1424 	struct nix_vtag_config *req;
1425 	struct mbox_msghdr *rsp_hdr;
1426 	int err;
1427 
1428 	/* Dont have enough mcam entries */
1429 	if (!(pf->flags & OTX2_FLAG_RX_VLAN_SUPPORT))
1430 		return -ENOMEM;
1431 
1432 	if (enable) {
1433 		err = otx2_install_rxvlan_offload_flow(pf);
1434 		if (err)
1435 			return err;
1436 	} else {
1437 		err = otx2_delete_rxvlan_offload_flow(pf);
1438 		if (err)
1439 			return err;
1440 	}
1441 
1442 	mutex_lock(&pf->mbox.lock);
1443 	req = otx2_mbox_alloc_msg_nix_vtag_cfg(&pf->mbox);
1444 	if (!req) {
1445 		mutex_unlock(&pf->mbox.lock);
1446 		return -ENOMEM;
1447 	}
1448 
1449 	/* config strip, capture and size */
1450 	req->vtag_size = VTAGSIZE_T4;
1451 	req->cfg_type = 1; /* rx vlan cfg */
1452 	req->rx.vtag_type = NIX_AF_LFX_RX_VTAG_TYPE0;
1453 	req->rx.strip_vtag = enable;
1454 	req->rx.capture_vtag = enable;
1455 
1456 	err = otx2_sync_mbox_msg(&pf->mbox);
1457 	if (err) {
1458 		mutex_unlock(&pf->mbox.lock);
1459 		return err;
1460 	}
1461 
1462 	rsp_hdr = otx2_mbox_get_rsp(&pf->mbox.mbox, 0, &req->hdr);
1463 	if (IS_ERR(rsp_hdr)) {
1464 		mutex_unlock(&pf->mbox.lock);
1465 		return PTR_ERR(rsp_hdr);
1466 	}
1467 
1468 	mutex_unlock(&pf->mbox.lock);
1469 	return rsp_hdr->rc;
1470 }
1471 
1472 void otx2_dmacflt_reinstall_flows(struct otx2_nic *pf)
1473 {
1474 	struct otx2_flow *iter;
1475 	struct ethhdr *eth_hdr;
1476 
1477 	list_for_each_entry(iter, &pf->flow_cfg->flow_list, list) {
1478 		if (iter->rule_type & DMAC_FILTER_RULE) {
1479 			eth_hdr = &iter->flow_spec.h_u.ether_spec;
1480 			otx2_dmacflt_add(pf, eth_hdr->h_dest,
1481 					 iter->entry);
1482 		}
1483 	}
1484 }
1485 
1486 void otx2_dmacflt_update_pfmac_flow(struct otx2_nic *pfvf)
1487 {
1488 	otx2_update_rem_pfmac(pfvf, DMAC_ADDR_UPDATE);
1489 }
1490