xref: /openbmc/linux/drivers/s390/net/qeth_l2_main.c (revision dd2939ef)
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  *    Copyright IBM Corp. 2007, 2009
4  *    Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
5  *		 Frank Pavlic <fpavlic@de.ibm.com>,
6  *		 Thomas Spatzier <tspat@de.ibm.com>,
7  *		 Frank Blaschka <frank.blaschka@de.ibm.com>
8  */
9 
10 #define KMSG_COMPONENT "qeth"
11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
12 
13 #include <linux/module.h>
14 #include <linux/moduleparam.h>
15 #include <linux/string.h>
16 #include <linux/errno.h>
17 #include <linux/kernel.h>
18 #include <linux/slab.h>
19 #include <linux/etherdevice.h>
20 #include <linux/if_bridge.h>
21 #include <linux/list.h>
22 #include <linux/hash.h>
23 #include <linux/hashtable.h>
24 #include <net/switchdev.h>
25 #include <asm/chsc.h>
26 #include <asm/css_chars.h>
27 #include <asm/setup.h>
28 #include "qeth_core.h"
29 #include "qeth_l2.h"
30 
31 static int qeth_l2_setdelmac_makerc(struct qeth_card *card, u16 retcode)
32 {
33 	int rc;
34 
35 	if (retcode)
36 		QETH_CARD_TEXT_(card, 2, "err%04x", retcode);
37 	switch (retcode) {
38 	case IPA_RC_SUCCESS:
39 		rc = 0;
40 		break;
41 	case IPA_RC_L2_UNSUPPORTED_CMD:
42 		rc = -EOPNOTSUPP;
43 		break;
44 	case IPA_RC_L2_ADDR_TABLE_FULL:
45 		rc = -ENOSPC;
46 		break;
47 	case IPA_RC_L2_DUP_MAC:
48 	case IPA_RC_L2_DUP_LAYER3_MAC:
49 		rc = -EADDRINUSE;
50 		break;
51 	case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
52 	case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
53 		rc = -EADDRNOTAVAIL;
54 		break;
55 	case IPA_RC_L2_MAC_NOT_FOUND:
56 		rc = -ENOENT;
57 		break;
58 	default:
59 		rc = -EIO;
60 		break;
61 	}
62 	return rc;
63 }
64 
65 static int qeth_l2_send_setdelmac_cb(struct qeth_card *card,
66 				     struct qeth_reply *reply,
67 				     unsigned long data)
68 {
69 	struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
70 
71 	return qeth_l2_setdelmac_makerc(card, cmd->hdr.return_code);
72 }
73 
74 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
75 			   enum qeth_ipa_cmds ipacmd)
76 {
77 	struct qeth_ipa_cmd *cmd;
78 	struct qeth_cmd_buffer *iob;
79 
80 	QETH_CARD_TEXT(card, 2, "L2sdmac");
81 	iob = qeth_ipa_alloc_cmd(card, ipacmd, QETH_PROT_IPV4,
82 				 IPA_DATA_SIZEOF(setdelmac));
83 	if (!iob)
84 		return -ENOMEM;
85 	cmd = __ipa_cmd(iob);
86 	cmd->data.setdelmac.mac_length = ETH_ALEN;
87 	ether_addr_copy(cmd->data.setdelmac.mac, mac);
88 	return qeth_send_ipa_cmd(card, iob, qeth_l2_send_setdelmac_cb, NULL);
89 }
90 
91 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
92 {
93 	int rc;
94 
95 	QETH_CARD_TEXT(card, 2, "L2Setmac");
96 	rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC);
97 	if (rc == 0) {
98 		dev_info(&card->gdev->dev,
99 			 "MAC address %pM successfully registered\n", mac);
100 	} else {
101 		switch (rc) {
102 		case -EADDRINUSE:
103 			dev_warn(&card->gdev->dev,
104 				"MAC address %pM already exists\n", mac);
105 			break;
106 		case -EADDRNOTAVAIL:
107 			dev_warn(&card->gdev->dev,
108 				"MAC address %pM is not authorized\n", mac);
109 			break;
110 		}
111 	}
112 	return rc;
113 }
114 
115 static int qeth_l2_write_mac(struct qeth_card *card, u8 *mac)
116 {
117 	enum qeth_ipa_cmds cmd = is_multicast_ether_addr(mac) ?
118 					IPA_CMD_SETGMAC : IPA_CMD_SETVMAC;
119 	int rc;
120 
121 	QETH_CARD_TEXT(card, 2, "L2Wmac");
122 	rc = qeth_l2_send_setdelmac(card, mac, cmd);
123 	if (rc == -EADDRINUSE)
124 		QETH_DBF_MESSAGE(2, "MAC already registered on device %x\n",
125 				 CARD_DEVID(card));
126 	else if (rc)
127 		QETH_DBF_MESSAGE(2, "Failed to register MAC on device %x: %d\n",
128 				 CARD_DEVID(card), rc);
129 	return rc;
130 }
131 
132 static int qeth_l2_remove_mac(struct qeth_card *card, u8 *mac)
133 {
134 	enum qeth_ipa_cmds cmd = is_multicast_ether_addr(mac) ?
135 					IPA_CMD_DELGMAC : IPA_CMD_DELVMAC;
136 	int rc;
137 
138 	QETH_CARD_TEXT(card, 2, "L2Rmac");
139 	rc = qeth_l2_send_setdelmac(card, mac, cmd);
140 	if (rc)
141 		QETH_DBF_MESSAGE(2, "Failed to delete MAC on device %u: %d\n",
142 				 CARD_DEVID(card), rc);
143 	return rc;
144 }
145 
146 static void qeth_l2_drain_rx_mode_cache(struct qeth_card *card)
147 {
148 	struct qeth_mac *mac;
149 	struct hlist_node *tmp;
150 	int i;
151 
152 	hash_for_each_safe(card->rx_mode_addrs, i, tmp, mac, hnode) {
153 		hash_del(&mac->hnode);
154 		kfree(mac);
155 	}
156 }
157 
158 static void qeth_l2_fill_header(struct qeth_qdio_out_q *queue,
159 				struct qeth_hdr *hdr, struct sk_buff *skb,
160 				__be16 proto, unsigned int data_len)
161 {
162 	int cast_type = qeth_get_ether_cast_type(skb);
163 	struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
164 
165 	hdr->hdr.l2.pkt_length = data_len;
166 
167 	if (skb_is_gso(skb)) {
168 		hdr->hdr.l2.id = QETH_HEADER_TYPE_L2_TSO;
169 	} else {
170 		hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
171 		if (skb->ip_summed == CHECKSUM_PARTIAL)
172 			qeth_tx_csum(skb, &hdr->hdr.l2.flags[1], proto);
173 	}
174 
175 	/* set byte byte 3 to casting flags */
176 	if (cast_type == RTN_MULTICAST)
177 		hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
178 	else if (cast_type == RTN_BROADCAST)
179 		hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
180 	else
181 		hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
182 
183 	/* VSWITCH relies on the VLAN
184 	 * information to be present in
185 	 * the QDIO header */
186 	if (veth->h_vlan_proto == htons(ETH_P_8021Q)) {
187 		hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
188 		hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
189 	}
190 }
191 
192 static int qeth_l2_setdelvlan_makerc(struct qeth_card *card, u16 retcode)
193 {
194 	if (retcode)
195 		QETH_CARD_TEXT_(card, 2, "err%04x", retcode);
196 
197 	switch (retcode) {
198 	case IPA_RC_SUCCESS:
199 		return 0;
200 	case IPA_RC_L2_INVALID_VLAN_ID:
201 		return -EINVAL;
202 	case IPA_RC_L2_DUP_VLAN_ID:
203 		return -EEXIST;
204 	case IPA_RC_L2_VLAN_ID_NOT_FOUND:
205 		return -ENOENT;
206 	case IPA_RC_L2_VLAN_ID_NOT_ALLOWED:
207 		return -EPERM;
208 	default:
209 		return -EIO;
210 	}
211 }
212 
213 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
214 				      struct qeth_reply *reply,
215 				      unsigned long data)
216 {
217 	struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
218 
219 	QETH_CARD_TEXT(card, 2, "L2sdvcb");
220 	if (cmd->hdr.return_code) {
221 		QETH_DBF_MESSAGE(2, "Error in processing VLAN %u on device %x: %#x.\n",
222 				 cmd->data.setdelvlan.vlan_id,
223 				 CARD_DEVID(card), cmd->hdr.return_code);
224 		QETH_CARD_TEXT_(card, 2, "L2VL%4x", cmd->hdr.command);
225 	}
226 	return qeth_l2_setdelvlan_makerc(card, cmd->hdr.return_code);
227 }
228 
229 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
230 				   enum qeth_ipa_cmds ipacmd)
231 {
232 	struct qeth_ipa_cmd *cmd;
233 	struct qeth_cmd_buffer *iob;
234 
235 	QETH_CARD_TEXT_(card, 4, "L2sdv%x", ipacmd);
236 	iob = qeth_ipa_alloc_cmd(card, ipacmd, QETH_PROT_IPV4,
237 				 IPA_DATA_SIZEOF(setdelvlan));
238 	if (!iob)
239 		return -ENOMEM;
240 	cmd = __ipa_cmd(iob);
241 	cmd->data.setdelvlan.vlan_id = i;
242 	return qeth_send_ipa_cmd(card, iob, qeth_l2_send_setdelvlan_cb, NULL);
243 }
244 
245 static int qeth_l2_vlan_rx_add_vid(struct net_device *dev,
246 				   __be16 proto, u16 vid)
247 {
248 	struct qeth_card *card = dev->ml_priv;
249 
250 	QETH_CARD_TEXT_(card, 4, "aid:%d", vid);
251 	if (!vid)
252 		return 0;
253 
254 	return qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
255 }
256 
257 static int qeth_l2_vlan_rx_kill_vid(struct net_device *dev,
258 				    __be16 proto, u16 vid)
259 {
260 	struct qeth_card *card = dev->ml_priv;
261 
262 	QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
263 	if (!vid)
264 		return 0;
265 
266 	return qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
267 }
268 
269 static void qeth_l2_set_pnso_mode(struct qeth_card *card,
270 				  enum qeth_pnso_mode mode)
271 {
272 	spin_lock_irq(get_ccwdev_lock(CARD_RDEV(card)));
273 	WRITE_ONCE(card->info.pnso_mode, mode);
274 	spin_unlock_irq(get_ccwdev_lock(CARD_RDEV(card)));
275 
276 	if (mode == QETH_PNSO_NONE)
277 		drain_workqueue(card->event_wq);
278 }
279 
280 static void qeth_l2_dev2br_fdb_flush(struct qeth_card *card)
281 {
282 	struct switchdev_notifier_fdb_info info;
283 
284 	QETH_CARD_TEXT(card, 2, "fdbflush");
285 
286 	info.addr = NULL;
287 	/* flush all VLANs: */
288 	info.vid = 0;
289 	info.added_by_user = false;
290 	info.offloaded = true;
291 
292 	call_switchdev_notifiers(SWITCHDEV_FDB_FLUSH_TO_BRIDGE,
293 				 card->dev, &info.info, NULL);
294 }
295 
296 static int qeth_l2_request_initial_mac(struct qeth_card *card)
297 {
298 	int rc = 0;
299 
300 	QETH_CARD_TEXT(card, 2, "l2reqmac");
301 
302 	if (MACHINE_IS_VM) {
303 		rc = qeth_vm_request_mac(card);
304 		if (!rc)
305 			goto out;
306 		QETH_DBF_MESSAGE(2, "z/VM MAC Service failed on device %x: %#x\n",
307 				 CARD_DEVID(card), rc);
308 		QETH_CARD_TEXT_(card, 2, "err%04x", rc);
309 		/* fall back to alternative mechanism: */
310 	}
311 
312 	if (!IS_OSN(card)) {
313 		rc = qeth_setadpparms_change_macaddr(card);
314 		if (!rc)
315 			goto out;
316 		QETH_DBF_MESSAGE(2, "READ_MAC Assist failed on device %x: %#x\n",
317 				 CARD_DEVID(card), rc);
318 		QETH_CARD_TEXT_(card, 2, "1err%04x", rc);
319 		/* fall back once more: */
320 	}
321 
322 	/* some devices don't support a custom MAC address: */
323 	if (IS_OSM(card) || IS_OSX(card))
324 		return (rc) ? rc : -EADDRNOTAVAIL;
325 	eth_hw_addr_random(card->dev);
326 
327 out:
328 	QETH_CARD_HEX(card, 2, card->dev->dev_addr, card->dev->addr_len);
329 	return 0;
330 }
331 
332 static void qeth_l2_register_dev_addr(struct qeth_card *card)
333 {
334 	if (!is_valid_ether_addr(card->dev->dev_addr))
335 		qeth_l2_request_initial_mac(card);
336 
337 	if (!IS_OSN(card) && !qeth_l2_send_setmac(card, card->dev->dev_addr))
338 		card->info.dev_addr_is_registered = 1;
339 	else
340 		card->info.dev_addr_is_registered = 0;
341 }
342 
343 static int qeth_l2_validate_addr(struct net_device *dev)
344 {
345 	struct qeth_card *card = dev->ml_priv;
346 
347 	if (card->info.dev_addr_is_registered)
348 		return eth_validate_addr(dev);
349 
350 	QETH_CARD_TEXT(card, 4, "nomacadr");
351 	return -EPERM;
352 }
353 
354 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
355 {
356 	struct sockaddr *addr = p;
357 	struct qeth_card *card = dev->ml_priv;
358 	u8 old_addr[ETH_ALEN];
359 	int rc = 0;
360 
361 	QETH_CARD_TEXT(card, 3, "setmac");
362 
363 	if (IS_OSM(card) || IS_OSX(card)) {
364 		QETH_CARD_TEXT(card, 3, "setmcTYP");
365 		return -EOPNOTSUPP;
366 	}
367 	QETH_CARD_HEX(card, 3, addr->sa_data, ETH_ALEN);
368 	if (!is_valid_ether_addr(addr->sa_data))
369 		return -EADDRNOTAVAIL;
370 
371 	/* don't register the same address twice */
372 	if (ether_addr_equal_64bits(dev->dev_addr, addr->sa_data) &&
373 	    card->info.dev_addr_is_registered)
374 		return 0;
375 
376 	/* add the new address, switch over, drop the old */
377 	rc = qeth_l2_send_setmac(card, addr->sa_data);
378 	if (rc)
379 		return rc;
380 	ether_addr_copy(old_addr, dev->dev_addr);
381 	ether_addr_copy(dev->dev_addr, addr->sa_data);
382 
383 	if (card->info.dev_addr_is_registered)
384 		qeth_l2_remove_mac(card, old_addr);
385 	card->info.dev_addr_is_registered = 1;
386 	return 0;
387 }
388 
389 static void qeth_l2_promisc_to_bridge(struct qeth_card *card, bool enable)
390 {
391 	int role;
392 	int rc;
393 
394 	QETH_CARD_TEXT(card, 3, "pmisc2br");
395 
396 	if (enable) {
397 		if (card->options.sbp.reflect_promisc_primary)
398 			role = QETH_SBP_ROLE_PRIMARY;
399 		else
400 			role = QETH_SBP_ROLE_SECONDARY;
401 	} else
402 		role = QETH_SBP_ROLE_NONE;
403 
404 	rc = qeth_bridgeport_setrole(card, role);
405 	QETH_CARD_TEXT_(card, 2, "bpm%c%04x", enable ? '+' : '-', rc);
406 	if (!rc) {
407 		card->options.sbp.role = role;
408 		card->info.promisc_mode = enable;
409 	}
410 }
411 
412 static void qeth_l2_set_promisc_mode(struct qeth_card *card)
413 {
414 	bool enable = card->dev->flags & IFF_PROMISC;
415 
416 	if (card->info.promisc_mode == enable)
417 		return;
418 
419 	if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE)) {
420 		qeth_setadp_promisc_mode(card, enable);
421 	} else {
422 		mutex_lock(&card->sbp_lock);
423 		if (card->options.sbp.reflect_promisc)
424 			qeth_l2_promisc_to_bridge(card, enable);
425 		mutex_unlock(&card->sbp_lock);
426 	}
427 }
428 
429 /* New MAC address is added to the hash table and marked to be written on card
430  * only if there is not in the hash table storage already
431  *
432 */
433 static void qeth_l2_add_mac(struct qeth_card *card, struct netdev_hw_addr *ha)
434 {
435 	u32 mac_hash = get_unaligned((u32 *)(&ha->addr[2]));
436 	struct qeth_mac *mac;
437 
438 	hash_for_each_possible(card->rx_mode_addrs, mac, hnode, mac_hash) {
439 		if (ether_addr_equal_64bits(ha->addr, mac->mac_addr)) {
440 			mac->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
441 			return;
442 		}
443 	}
444 
445 	mac = kzalloc(sizeof(struct qeth_mac), GFP_ATOMIC);
446 	if (!mac)
447 		return;
448 
449 	ether_addr_copy(mac->mac_addr, ha->addr);
450 	mac->disp_flag = QETH_DISP_ADDR_ADD;
451 
452 	hash_add(card->rx_mode_addrs, &mac->hnode, mac_hash);
453 }
454 
455 static void qeth_l2_rx_mode_work(struct work_struct *work)
456 {
457 	struct qeth_card *card = container_of(work, struct qeth_card,
458 					      rx_mode_work);
459 	struct net_device *dev = card->dev;
460 	struct netdev_hw_addr *ha;
461 	struct qeth_mac *mac;
462 	struct hlist_node *tmp;
463 	int i;
464 	int rc;
465 
466 	QETH_CARD_TEXT(card, 3, "setmulti");
467 
468 	netif_addr_lock_bh(dev);
469 	netdev_for_each_mc_addr(ha, dev)
470 		qeth_l2_add_mac(card, ha);
471 	netdev_for_each_uc_addr(ha, dev)
472 		qeth_l2_add_mac(card, ha);
473 	netif_addr_unlock_bh(dev);
474 
475 	hash_for_each_safe(card->rx_mode_addrs, i, tmp, mac, hnode) {
476 		switch (mac->disp_flag) {
477 		case QETH_DISP_ADDR_DELETE:
478 			qeth_l2_remove_mac(card, mac->mac_addr);
479 			hash_del(&mac->hnode);
480 			kfree(mac);
481 			break;
482 		case QETH_DISP_ADDR_ADD:
483 			rc = qeth_l2_write_mac(card, mac->mac_addr);
484 			if (rc) {
485 				hash_del(&mac->hnode);
486 				kfree(mac);
487 				break;
488 			}
489 			fallthrough;
490 		default:
491 			/* for next call to set_rx_mode(): */
492 			mac->disp_flag = QETH_DISP_ADDR_DELETE;
493 		}
494 	}
495 
496 	qeth_l2_set_promisc_mode(card);
497 }
498 
499 static int qeth_l2_xmit_osn(struct qeth_card *card, struct sk_buff *skb,
500 			    struct qeth_qdio_out_q *queue)
501 {
502 	gfp_t gfp = GFP_ATOMIC | (skb_pfmemalloc(skb) ? __GFP_MEMALLOC : 0);
503 	struct qeth_hdr *hdr = (struct qeth_hdr *)skb->data;
504 	addr_t end = (addr_t)(skb->data + sizeof(*hdr));
505 	addr_t start = (addr_t)skb->data;
506 	unsigned int elements = 0;
507 	unsigned int hd_len = 0;
508 	int rc;
509 
510 	if (skb->protocol == htons(ETH_P_IPV6))
511 		return -EPROTONOSUPPORT;
512 
513 	if (qeth_get_elements_for_range(start, end) > 1) {
514 		/* Misaligned HW header, move it to its own buffer element. */
515 		hdr = kmem_cache_alloc(qeth_core_header_cache, gfp);
516 		if (!hdr)
517 			return -ENOMEM;
518 		hd_len = sizeof(*hdr);
519 		skb_copy_from_linear_data(skb, (char *)hdr, hd_len);
520 		elements++;
521 	}
522 
523 	elements += qeth_count_elements(skb, hd_len);
524 	if (elements > queue->max_elements) {
525 		rc = -E2BIG;
526 		goto out;
527 	}
528 
529 	rc = qeth_do_send_packet(card, queue, skb, hdr, hd_len, hd_len,
530 				 elements);
531 out:
532 	if (rc && hd_len)
533 		kmem_cache_free(qeth_core_header_cache, hdr);
534 	return rc;
535 }
536 
537 static netdev_tx_t qeth_l2_hard_start_xmit(struct sk_buff *skb,
538 					   struct net_device *dev)
539 {
540 	struct qeth_card *card = dev->ml_priv;
541 	u16 txq = skb_get_queue_mapping(skb);
542 	struct qeth_qdio_out_q *queue;
543 	int rc;
544 
545 	if (!skb_is_gso(skb))
546 		qdisc_skb_cb(skb)->pkt_len = skb->len;
547 	if (IS_IQD(card))
548 		txq = qeth_iqd_translate_txq(dev, txq);
549 	queue = card->qdio.out_qs[txq];
550 
551 	if (IS_OSN(card))
552 		rc = qeth_l2_xmit_osn(card, skb, queue);
553 	else
554 		rc = qeth_xmit(card, skb, queue, vlan_get_protocol(skb),
555 			       qeth_l2_fill_header);
556 
557 	if (!rc)
558 		return NETDEV_TX_OK;
559 
560 	QETH_TXQ_STAT_INC(queue, tx_dropped);
561 	kfree_skb(skb);
562 	return NETDEV_TX_OK;
563 }
564 
565 static u16 qeth_l2_select_queue(struct net_device *dev, struct sk_buff *skb,
566 				struct net_device *sb_dev)
567 {
568 	struct qeth_card *card = dev->ml_priv;
569 
570 	if (IS_IQD(card))
571 		return qeth_iqd_select_queue(dev, skb,
572 					     qeth_get_ether_cast_type(skb),
573 					     sb_dev);
574 	if (qeth_uses_tx_prio_queueing(card))
575 		return qeth_get_priority_queue(card, skb);
576 
577 	return netdev_pick_tx(dev, skb, sb_dev);
578 }
579 
580 static void qeth_l2_set_rx_mode(struct net_device *dev)
581 {
582 	struct qeth_card *card = dev->ml_priv;
583 
584 	schedule_work(&card->rx_mode_work);
585 }
586 
587 /**
588  *	qeth_l2_pnso() - perform network subchannel operation
589  *	@card: qeth_card structure pointer
590  *	@oc: Operation Code
591  *	@cnc: Boolean Change-Notification Control
592  *	@cb: Callback function will be executed for each element
593  *		of the address list
594  *	@priv: Pointer to pass to the callback function.
595  *
596  *	Collects network information in a network address list and calls the
597  *	callback function for every entry in the list. If "change-notification-
598  *	control" is set, further changes in the address list will be reported
599  *	via the IPA command.
600  */
601 static int qeth_l2_pnso(struct qeth_card *card, u8 oc, int cnc,
602 			void (*cb)(void *priv, struct chsc_pnso_naid_l2 *entry),
603 			void *priv)
604 {
605 	struct ccw_device *ddev = CARD_DDEV(card);
606 	struct chsc_pnso_area *rr;
607 	u32 prev_instance = 0;
608 	int isfirstblock = 1;
609 	int i, size, elems;
610 	int rc;
611 
612 	rr = (struct chsc_pnso_area *)get_zeroed_page(GFP_KERNEL);
613 	if (rr == NULL)
614 		return -ENOMEM;
615 	do {
616 		QETH_CARD_TEXT(card, 2, "PNSO");
617 		/* on the first iteration, naihdr.resume_token will be zero */
618 		rc = ccw_device_pnso(ddev, rr, oc, rr->naihdr.resume_token,
619 				     cnc);
620 		if (rc)
621 			continue;
622 		if (cb == NULL)
623 			continue;
624 
625 		size = rr->naihdr.naids;
626 		if (size != sizeof(struct chsc_pnso_naid_l2)) {
627 			WARN_ON_ONCE(1);
628 			continue;
629 		}
630 
631 		elems = (rr->response.length - sizeof(struct chsc_header) -
632 			 sizeof(struct chsc_pnso_naihdr)) / size;
633 
634 		if (!isfirstblock && (rr->naihdr.instance != prev_instance)) {
635 			/* Inform the caller that they need to scrap */
636 			/* the data that was already reported via cb */
637 			rc = -EAGAIN;
638 			break;
639 		}
640 		isfirstblock = 0;
641 		prev_instance = rr->naihdr.instance;
642 		for (i = 0; i < elems; i++)
643 			(*cb)(priv, &rr->entries[i]);
644 	} while ((rc == -EBUSY) || (!rc && /* list stored */
645 		   /* resume token is non-zero => list incomplete */
646 		   (rr->naihdr.resume_token.t1 || rr->naihdr.resume_token.t2)));
647 
648 	if (rc)
649 		QETH_CARD_TEXT_(card, 2, "PNrp%04x", rr->response.code);
650 
651 	free_page((unsigned long)rr);
652 	return rc;
653 }
654 
655 static bool qeth_is_my_net_if_token(struct qeth_card *card,
656 				    struct net_if_token *token)
657 {
658 	return ((card->info.ddev_devno == token->devnum) &&
659 		(card->info.cssid == token->cssid) &&
660 		(card->info.iid == token->iid) &&
661 		(card->info.ssid == token->ssid) &&
662 		(card->info.chpid == token->chpid) &&
663 		(card->info.chid == token->chid));
664 }
665 
666 /**
667  *	qeth_l2_dev2br_fdb_notify() - update fdb of master bridge
668  *	@card:	qeth_card structure pointer
669  *	@code:	event bitmask: high order bit 0x80 set to
670  *				1 - removal of an object
671  *				0 - addition of an object
672  *			       Object type(s):
673  *				0x01 - VLAN, 0x02 - MAC, 0x03 - VLAN and MAC
674  *	@token: "network token" structure identifying 'physical' location
675  *		of the target
676  *	@addr_lnid: structure with MAC address and VLAN ID of the target
677  */
678 static void qeth_l2_dev2br_fdb_notify(struct qeth_card *card, u8 code,
679 				      struct net_if_token *token,
680 				      struct mac_addr_lnid *addr_lnid)
681 {
682 	struct switchdev_notifier_fdb_info info;
683 	u8 ntfy_mac[ETH_ALEN];
684 
685 	ether_addr_copy(ntfy_mac, addr_lnid->mac);
686 	/* Ignore VLAN only changes */
687 	if (!(code & IPA_ADDR_CHANGE_CODE_MACADDR))
688 		return;
689 	/* Ignore mcast entries */
690 	if (is_multicast_ether_addr(ntfy_mac))
691 		return;
692 	/* Ignore my own addresses */
693 	if (qeth_is_my_net_if_token(card, token))
694 		return;
695 
696 	info.addr = ntfy_mac;
697 	/* don't report VLAN IDs */
698 	info.vid = 0;
699 	info.added_by_user = false;
700 	info.offloaded = true;
701 
702 	if (code & IPA_ADDR_CHANGE_CODE_REMOVAL) {
703 		call_switchdev_notifiers(SWITCHDEV_FDB_DEL_TO_BRIDGE,
704 					 card->dev, &info.info, NULL);
705 		QETH_CARD_TEXT(card, 4, "andelmac");
706 		QETH_CARD_TEXT_(card, 4,
707 				"mc%012lx", ether_addr_to_u64(ntfy_mac));
708 	} else {
709 		call_switchdev_notifiers(SWITCHDEV_FDB_ADD_TO_BRIDGE,
710 					 card->dev, &info.info, NULL);
711 		QETH_CARD_TEXT(card, 4, "anaddmac");
712 		QETH_CARD_TEXT_(card, 4,
713 				"mc%012lx", ether_addr_to_u64(ntfy_mac));
714 	}
715 }
716 
717 static void qeth_l2_dev2br_an_set_cb(void *priv,
718 				     struct chsc_pnso_naid_l2 *entry)
719 {
720 	u8 code = IPA_ADDR_CHANGE_CODE_MACADDR;
721 	struct qeth_card *card = priv;
722 
723 	if (entry->addr_lnid.lnid < VLAN_N_VID)
724 		code |= IPA_ADDR_CHANGE_CODE_VLANID;
725 	qeth_l2_dev2br_fdb_notify(card, code,
726 				  (struct net_if_token *)&entry->nit,
727 				  (struct mac_addr_lnid *)&entry->addr_lnid);
728 }
729 
730 /**
731  *	qeth_l2_dev2br_an_set() -
732  *	Enable or disable 'dev to bridge network address notification'
733  *	@card: qeth_card structure pointer
734  *	@enable: Enable or disable 'dev to bridge network address notification'
735  *
736  *	Returns negative errno-compatible error indication or 0 on success.
737  *
738  *	On enable, emits a series of address notifications for all
739  *	currently registered hosts.
740  */
741 static int qeth_l2_dev2br_an_set(struct qeth_card *card, bool enable)
742 {
743 	int rc;
744 
745 	if (enable) {
746 		QETH_CARD_TEXT(card, 2, "anseton");
747 		rc = qeth_l2_pnso(card, PNSO_OC_NET_ADDR_INFO, 1,
748 				  qeth_l2_dev2br_an_set_cb, card);
749 		if (rc == -EAGAIN)
750 			/* address notification enabled, but inconsistent
751 			 * addresses reported -> disable address notification
752 			 */
753 			qeth_l2_pnso(card, PNSO_OC_NET_ADDR_INFO, 0,
754 				     NULL, NULL);
755 	} else {
756 		QETH_CARD_TEXT(card, 2, "ansetoff");
757 		rc = qeth_l2_pnso(card, PNSO_OC_NET_ADDR_INFO, 0, NULL, NULL);
758 	}
759 
760 	return rc;
761 }
762 
763 static int qeth_l2_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
764 				  struct net_device *dev, u32 filter_mask,
765 				  int nlflags)
766 {
767 	struct qeth_priv *priv = netdev_priv(dev);
768 	struct qeth_card *card = dev->ml_priv;
769 	u16 mode = BRIDGE_MODE_UNDEF;
770 
771 	/* Do not even show qeth devs that cannot do bridge_setlink */
772 	if (!priv->brport_hw_features || !netif_device_present(dev) ||
773 	    qeth_bridgeport_is_in_use(card))
774 		return -EOPNOTSUPP;
775 
776 	return ndo_dflt_bridge_getlink(skb, pid, seq, dev,
777 				       mode, priv->brport_features,
778 				       priv->brport_hw_features,
779 				       nlflags, filter_mask, NULL);
780 }
781 
782 static const struct nla_policy qeth_brport_policy[IFLA_BRPORT_MAX + 1] = {
783 	[IFLA_BRPORT_LEARNING_SYNC]	= { .type = NLA_U8 },
784 };
785 
786 /**
787  *	qeth_l2_bridge_setlink() - set bridgeport attributes
788  *	@dev: netdevice
789  *	@nlh: netlink message header
790  *	@flags: bridge flags (here: BRIDGE_FLAGS_SELF)
791  *	@extack: extended ACK report struct
792  *
793  *	Called under rtnl_lock
794  */
795 static int qeth_l2_bridge_setlink(struct net_device *dev, struct nlmsghdr *nlh,
796 				  u16 flags, struct netlink_ext_ack *extack)
797 {
798 	struct qeth_priv *priv = netdev_priv(dev);
799 	struct nlattr *bp_tb[IFLA_BRPORT_MAX + 1];
800 	struct qeth_card *card = dev->ml_priv;
801 	struct nlattr *attr, *nested_attr;
802 	bool enable, has_protinfo = false;
803 	int rem1, rem2;
804 	int rc;
805 
806 	if (!netif_device_present(dev))
807 		return -ENODEV;
808 
809 	nlmsg_for_each_attr(attr, nlh, sizeof(struct ifinfomsg), rem1) {
810 		if (nla_type(attr) == IFLA_PROTINFO) {
811 			rc = nla_parse_nested(bp_tb, IFLA_BRPORT_MAX, attr,
812 					      qeth_brport_policy, extack);
813 			if (rc)
814 				return rc;
815 			has_protinfo = true;
816 		} else if (nla_type(attr) == IFLA_AF_SPEC) {
817 			nla_for_each_nested(nested_attr, attr, rem2) {
818 				if (nla_type(nested_attr) == IFLA_BRIDGE_FLAGS)
819 					continue;
820 				NL_SET_ERR_MSG_ATTR(extack, nested_attr,
821 						    "Unsupported attribute");
822 				return -EINVAL;
823 			}
824 		} else {
825 			NL_SET_ERR_MSG_ATTR(extack, attr, "Unsupported attribute");
826 			return -EINVAL;
827 		}
828 	}
829 	if (!has_protinfo)
830 		return 0;
831 	if (!bp_tb[IFLA_BRPORT_LEARNING_SYNC])
832 		return -EINVAL;
833 	if (!(priv->brport_hw_features & BR_LEARNING_SYNC)) {
834 		NL_SET_ERR_MSG_ATTR(extack, bp_tb[IFLA_BRPORT_LEARNING_SYNC],
835 				    "Operation not supported by HW");
836 		return -EOPNOTSUPP;
837 	}
838 	if (!IS_ENABLED(CONFIG_NET_SWITCHDEV)) {
839 		NL_SET_ERR_MSG_ATTR(extack, bp_tb[IFLA_BRPORT_LEARNING_SYNC],
840 				    "Requires NET_SWITCHDEV");
841 		return -EOPNOTSUPP;
842 	}
843 	enable = !!nla_get_u8(bp_tb[IFLA_BRPORT_LEARNING_SYNC]);
844 
845 	if (enable == !!(priv->brport_features & BR_LEARNING_SYNC))
846 		return 0;
847 
848 	mutex_lock(&card->sbp_lock);
849 	/* do not change anything if BridgePort is enabled */
850 	if (qeth_bridgeport_is_in_use(card)) {
851 		NL_SET_ERR_MSG(extack, "n/a (BridgePort)");
852 		rc = -EBUSY;
853 	} else if (enable) {
854 		qeth_l2_set_pnso_mode(card, QETH_PNSO_ADDR_INFO);
855 		rc = qeth_l2_dev2br_an_set(card, true);
856 		if (rc)
857 			qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
858 		else
859 			priv->brport_features |= BR_LEARNING_SYNC;
860 	} else {
861 		rc = qeth_l2_dev2br_an_set(card, false);
862 		if (!rc) {
863 			qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
864 			priv->brport_features ^= BR_LEARNING_SYNC;
865 			qeth_l2_dev2br_fdb_flush(card);
866 		}
867 	}
868 	mutex_unlock(&card->sbp_lock);
869 
870 	return rc;
871 }
872 
873 static const struct net_device_ops qeth_l2_netdev_ops = {
874 	.ndo_open		= qeth_open,
875 	.ndo_stop		= qeth_stop,
876 	.ndo_get_stats64	= qeth_get_stats64,
877 	.ndo_start_xmit		= qeth_l2_hard_start_xmit,
878 	.ndo_features_check	= qeth_features_check,
879 	.ndo_select_queue	= qeth_l2_select_queue,
880 	.ndo_validate_addr	= qeth_l2_validate_addr,
881 	.ndo_set_rx_mode	= qeth_l2_set_rx_mode,
882 	.ndo_do_ioctl		= qeth_do_ioctl,
883 	.ndo_set_mac_address    = qeth_l2_set_mac_address,
884 	.ndo_vlan_rx_add_vid	= qeth_l2_vlan_rx_add_vid,
885 	.ndo_vlan_rx_kill_vid   = qeth_l2_vlan_rx_kill_vid,
886 	.ndo_tx_timeout		= qeth_tx_timeout,
887 	.ndo_fix_features	= qeth_fix_features,
888 	.ndo_set_features	= qeth_set_features,
889 	.ndo_bridge_getlink	= qeth_l2_bridge_getlink,
890 	.ndo_bridge_setlink	= qeth_l2_bridge_setlink,
891 };
892 
893 static const struct net_device_ops qeth_osn_netdev_ops = {
894 	.ndo_open		= qeth_open,
895 	.ndo_stop		= qeth_stop,
896 	.ndo_get_stats64	= qeth_get_stats64,
897 	.ndo_start_xmit		= qeth_l2_hard_start_xmit,
898 	.ndo_validate_addr	= eth_validate_addr,
899 	.ndo_tx_timeout		= qeth_tx_timeout,
900 };
901 
902 static int qeth_l2_setup_netdev(struct qeth_card *card)
903 {
904 	if (IS_OSN(card)) {
905 		card->dev->netdev_ops = &qeth_osn_netdev_ops;
906 		card->dev->flags |= IFF_NOARP;
907 		goto add_napi;
908 	}
909 
910 	card->dev->needed_headroom = sizeof(struct qeth_hdr);
911 	card->dev->netdev_ops = &qeth_l2_netdev_ops;
912 	card->dev->priv_flags |= IFF_UNICAST_FLT;
913 
914 	if (IS_OSM(card)) {
915 		card->dev->features |= NETIF_F_VLAN_CHALLENGED;
916 	} else {
917 		if (!IS_VM_NIC(card))
918 			card->dev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
919 		card->dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
920 	}
921 
922 	if (IS_OSD(card) && !IS_VM_NIC(card)) {
923 		card->dev->features |= NETIF_F_SG;
924 		/* OSA 3S and earlier has no RX/TX support */
925 		if (qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM)) {
926 			card->dev->hw_features |= NETIF_F_IP_CSUM;
927 			card->dev->vlan_features |= NETIF_F_IP_CSUM;
928 		}
929 	}
930 	if (qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) {
931 		card->dev->hw_features |= NETIF_F_IPV6_CSUM;
932 		card->dev->vlan_features |= NETIF_F_IPV6_CSUM;
933 	}
934 	if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM) ||
935 	    qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6)) {
936 		card->dev->hw_features |= NETIF_F_RXCSUM;
937 		card->dev->vlan_features |= NETIF_F_RXCSUM;
938 	}
939 	if (qeth_is_supported(card, IPA_OUTBOUND_TSO)) {
940 		card->dev->hw_features |= NETIF_F_TSO;
941 		card->dev->vlan_features |= NETIF_F_TSO;
942 	}
943 	if (qeth_is_supported6(card, IPA_OUTBOUND_TSO)) {
944 		card->dev->hw_features |= NETIF_F_TSO6;
945 		card->dev->vlan_features |= NETIF_F_TSO6;
946 	}
947 
948 	if (card->dev->hw_features & (NETIF_F_TSO | NETIF_F_TSO6)) {
949 		card->dev->needed_headroom = sizeof(struct qeth_hdr_tso);
950 		netif_keep_dst(card->dev);
951 		netif_set_gso_max_size(card->dev,
952 				       PAGE_SIZE * (QDIO_MAX_ELEMENTS_PER_BUFFER - 1));
953 	}
954 
955 add_napi:
956 	netif_napi_add(card->dev, &card->napi, qeth_poll, QETH_NAPI_WEIGHT);
957 	return register_netdev(card->dev);
958 }
959 
960 static void qeth_l2_trace_features(struct qeth_card *card)
961 {
962 	/* Set BridgePort features */
963 	QETH_CARD_TEXT(card, 2, "featuSBP");
964 	QETH_CARD_HEX(card, 2, &card->options.sbp.supported_funcs,
965 		      sizeof(card->options.sbp.supported_funcs));
966 	/* VNIC Characteristics features */
967 	QETH_CARD_TEXT(card, 2, "feaVNICC");
968 	QETH_CARD_HEX(card, 2, &card->options.vnicc.sup_chars,
969 		      sizeof(card->options.vnicc.sup_chars));
970 }
971 
972 static void qeth_l2_setup_bridgeport_attrs(struct qeth_card *card)
973 {
974 	if (!card->options.sbp.reflect_promisc &&
975 	    card->options.sbp.role != QETH_SBP_ROLE_NONE) {
976 		/* Conditional to avoid spurious error messages */
977 		qeth_bridgeport_setrole(card, card->options.sbp.role);
978 		/* Let the callback function refresh the stored role value. */
979 		qeth_bridgeport_query_ports(card, &card->options.sbp.role,
980 					    NULL);
981 	}
982 	if (card->options.sbp.hostnotification) {
983 		if (qeth_bridgeport_an_set(card, 1))
984 			card->options.sbp.hostnotification = 0;
985 	}
986 }
987 
988 /**
989  *	qeth_l2_detect_dev2br_support() -
990  *	Detect whether this card supports 'dev to bridge fdb network address
991  *	change notification' and thus can support the learning_sync bridgeport
992  *	attribute
993  *	@card: qeth_card structure pointer
994  */
995 static void qeth_l2_detect_dev2br_support(struct qeth_card *card)
996 {
997 	struct qeth_priv *priv = netdev_priv(card->dev);
998 	bool dev2br_supported;
999 
1000 	QETH_CARD_TEXT(card, 2, "d2brsup");
1001 	if (!IS_IQD(card))
1002 		return;
1003 
1004 	/* dev2br requires valid cssid,iid,chid */
1005 	dev2br_supported = card->info.ids_valid &&
1006 			   css_general_characteristics.enarf;
1007 	QETH_CARD_TEXT_(card, 2, "D2Bsup%02x", dev2br_supported);
1008 
1009 	if (dev2br_supported)
1010 		priv->brport_hw_features |= BR_LEARNING_SYNC;
1011 	else
1012 		priv->brport_hw_features &= ~BR_LEARNING_SYNC;
1013 }
1014 
1015 static void qeth_l2_enable_brport_features(struct qeth_card *card)
1016 {
1017 	struct qeth_priv *priv = netdev_priv(card->dev);
1018 	int rc;
1019 
1020 	if (priv->brport_features & BR_LEARNING_SYNC) {
1021 		if (priv->brport_hw_features & BR_LEARNING_SYNC) {
1022 			qeth_l2_set_pnso_mode(card, QETH_PNSO_ADDR_INFO);
1023 			rc = qeth_l2_dev2br_an_set(card, true);
1024 			if (rc == -EAGAIN) {
1025 				/* Recoverable error, retry once */
1026 				qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
1027 				qeth_l2_dev2br_fdb_flush(card);
1028 				qeth_l2_set_pnso_mode(card, QETH_PNSO_ADDR_INFO);
1029 				rc = qeth_l2_dev2br_an_set(card, true);
1030 			}
1031 			if (rc) {
1032 				netdev_err(card->dev,
1033 					   "failed to enable bridge learning_sync: %d\n",
1034 					   rc);
1035 				qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
1036 				qeth_l2_dev2br_fdb_flush(card);
1037 				priv->brport_features ^= BR_LEARNING_SYNC;
1038 			}
1039 		} else {
1040 			dev_warn(&card->gdev->dev,
1041 				"bridge learning_sync not supported\n");
1042 			priv->brport_features ^= BR_LEARNING_SYNC;
1043 		}
1044 	}
1045 }
1046 
1047 #ifdef CONFIG_QETH_OSN
1048 static void qeth_osn_assist_cb(struct qeth_card *card,
1049 			       struct qeth_cmd_buffer *iob,
1050 			       unsigned int data_length)
1051 {
1052 	qeth_notify_cmd(iob, 0);
1053 	qeth_put_cmd(iob);
1054 }
1055 
1056 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1057 {
1058 	struct qeth_cmd_buffer *iob;
1059 	struct qeth_card *card;
1060 
1061 	if (data_len < 0)
1062 		return -EINVAL;
1063 	if (!dev)
1064 		return -ENODEV;
1065 	card = dev->ml_priv;
1066 	if (!card)
1067 		return -ENODEV;
1068 	QETH_CARD_TEXT(card, 2, "osnsdmc");
1069 	if (!qeth_card_hw_is_reachable(card))
1070 		return -ENODEV;
1071 
1072 	iob = qeth_alloc_cmd(&card->write, IPA_PDU_HEADER_SIZE + data_len, 1,
1073 			     QETH_IPA_TIMEOUT);
1074 	if (!iob)
1075 		return -ENOMEM;
1076 
1077 	qeth_prepare_ipa_cmd(card, iob, (u16) data_len, NULL);
1078 
1079 	memcpy(__ipa_cmd(iob), data, data_len);
1080 	iob->callback = qeth_osn_assist_cb;
1081 	return qeth_send_ipa_cmd(card, iob, NULL, NULL);
1082 }
1083 EXPORT_SYMBOL(qeth_osn_assist);
1084 
1085 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1086 		  int (*assist_cb)(struct net_device *, void *),
1087 		  int (*data_cb)(struct sk_buff *))
1088 {
1089 	struct qeth_card *card;
1090 	char bus_id[16];
1091 	u16 devno;
1092 
1093 	memcpy(&devno, read_dev_no, 2);
1094 	sprintf(bus_id, "0.0.%04x", devno);
1095 	card = qeth_get_card_by_busid(bus_id);
1096 	if (!card || !IS_OSN(card))
1097 		return -ENODEV;
1098 	*dev = card->dev;
1099 
1100 	QETH_CARD_TEXT(card, 2, "osnreg");
1101 	if ((assist_cb == NULL) || (data_cb == NULL))
1102 		return -EINVAL;
1103 	card->osn_info.assist_cb = assist_cb;
1104 	card->osn_info.data_cb = data_cb;
1105 	return 0;
1106 }
1107 EXPORT_SYMBOL(qeth_osn_register);
1108 
1109 void qeth_osn_deregister(struct net_device *dev)
1110 {
1111 	struct qeth_card *card;
1112 
1113 	if (!dev)
1114 		return;
1115 	card = dev->ml_priv;
1116 	if (!card)
1117 		return;
1118 	QETH_CARD_TEXT(card, 2, "osndereg");
1119 	card->osn_info.assist_cb = NULL;
1120 	card->osn_info.data_cb = NULL;
1121 }
1122 EXPORT_SYMBOL(qeth_osn_deregister);
1123 #endif
1124 
1125 /* SETBRIDGEPORT support, async notifications */
1126 
1127 enum qeth_an_event_type {anev_reg_unreg, anev_abort, anev_reset};
1128 
1129 /**
1130  * qeth_bridge_emit_host_event() - bridgeport address change notification
1131  * @card:  qeth_card structure pointer, for udev events.
1132  * @evtype:  "normal" register/unregister, or abort, or reset. For abort
1133  *	      and reset token and addr_lnid are unused and may be NULL.
1134  * @code:  event bitmask: high order bit 0x80 value 1 means removal of an
1135  *			  object, 0 - addition of an object.
1136  *			  0x01 - VLAN, 0x02 - MAC, 0x03 - VLAN and MAC.
1137  * @token: "network token" structure identifying physical address of the port.
1138  * @addr_lnid: pointer to structure with MAC address and VLAN ID.
1139  *
1140  * This function is called when registrations and deregistrations are
1141  * reported by the hardware, and also when notifications are enabled -
1142  * for all currently registered addresses.
1143  */
1144 static void qeth_bridge_emit_host_event(struct qeth_card *card,
1145 					enum qeth_an_event_type evtype,
1146 					u8 code,
1147 					struct net_if_token *token,
1148 					struct mac_addr_lnid *addr_lnid)
1149 {
1150 	char str[7][32];
1151 	char *env[8];
1152 	int i = 0;
1153 
1154 	switch (evtype) {
1155 	case anev_reg_unreg:
1156 		snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=%s",
1157 				(code & IPA_ADDR_CHANGE_CODE_REMOVAL)
1158 				? "deregister" : "register");
1159 		env[i] = str[i]; i++;
1160 		if (code & IPA_ADDR_CHANGE_CODE_VLANID) {
1161 			snprintf(str[i], sizeof(str[i]), "VLAN=%d",
1162 				addr_lnid->lnid);
1163 			env[i] = str[i]; i++;
1164 		}
1165 		if (code & IPA_ADDR_CHANGE_CODE_MACADDR) {
1166 			snprintf(str[i], sizeof(str[i]), "MAC=%pM",
1167 				addr_lnid->mac);
1168 			env[i] = str[i]; i++;
1169 		}
1170 		snprintf(str[i], sizeof(str[i]), "NTOK_BUSID=%x.%x.%04x",
1171 			token->cssid, token->ssid, token->devnum);
1172 		env[i] = str[i]; i++;
1173 		snprintf(str[i], sizeof(str[i]), "NTOK_IID=%02x", token->iid);
1174 		env[i] = str[i]; i++;
1175 		snprintf(str[i], sizeof(str[i]), "NTOK_CHPID=%02x",
1176 				token->chpid);
1177 		env[i] = str[i]; i++;
1178 		snprintf(str[i], sizeof(str[i]), "NTOK_CHID=%04x", token->chid);
1179 		env[i] = str[i]; i++;
1180 		break;
1181 	case anev_abort:
1182 		snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=abort");
1183 		env[i] = str[i]; i++;
1184 		break;
1185 	case anev_reset:
1186 		snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=reset");
1187 		env[i] = str[i]; i++;
1188 		break;
1189 	}
1190 	env[i] = NULL;
1191 	kobject_uevent_env(&card->gdev->dev.kobj, KOBJ_CHANGE, env);
1192 }
1193 
1194 struct qeth_bridge_state_data {
1195 	struct work_struct worker;
1196 	struct qeth_card *card;
1197 	u8 role;
1198 	u8 state;
1199 };
1200 
1201 static void qeth_bridge_state_change_worker(struct work_struct *work)
1202 {
1203 	struct qeth_bridge_state_data *data =
1204 		container_of(work, struct qeth_bridge_state_data, worker);
1205 	char env_locrem[32];
1206 	char env_role[32];
1207 	char env_state[32];
1208 	char *env[] = {
1209 		env_locrem,
1210 		env_role,
1211 		env_state,
1212 		NULL
1213 	};
1214 
1215 	snprintf(env_locrem, sizeof(env_locrem), "BRIDGEPORT=statechange");
1216 	snprintf(env_role, sizeof(env_role), "ROLE=%s",
1217 		(data->role == QETH_SBP_ROLE_NONE) ? "none" :
1218 		(data->role == QETH_SBP_ROLE_PRIMARY) ? "primary" :
1219 		(data->role == QETH_SBP_ROLE_SECONDARY) ? "secondary" :
1220 		"<INVALID>");
1221 	snprintf(env_state, sizeof(env_state), "STATE=%s",
1222 		(data->state == QETH_SBP_STATE_INACTIVE) ? "inactive" :
1223 		(data->state == QETH_SBP_STATE_STANDBY) ? "standby" :
1224 		(data->state == QETH_SBP_STATE_ACTIVE) ? "active" :
1225 		"<INVALID>");
1226 	kobject_uevent_env(&data->card->gdev->dev.kobj,
1227 				KOBJ_CHANGE, env);
1228 	kfree(data);
1229 }
1230 
1231 static void qeth_bridge_state_change(struct qeth_card *card,
1232 					struct qeth_ipa_cmd *cmd)
1233 {
1234 	struct qeth_sbp_port_data *qports = &cmd->data.sbp.data.port_data;
1235 	struct qeth_bridge_state_data *data;
1236 
1237 	QETH_CARD_TEXT(card, 2, "brstchng");
1238 	if (qports->num_entries == 0) {
1239 		QETH_CARD_TEXT(card, 2, "BPempty");
1240 		return;
1241 	}
1242 	if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1243 		QETH_CARD_TEXT_(card, 2, "BPsz%04x", qports->entry_length);
1244 		return;
1245 	}
1246 
1247 	data = kzalloc(sizeof(*data), GFP_ATOMIC);
1248 	if (!data) {
1249 		QETH_CARD_TEXT(card, 2, "BPSalloc");
1250 		return;
1251 	}
1252 	INIT_WORK(&data->worker, qeth_bridge_state_change_worker);
1253 	data->card = card;
1254 	/* Information for the local port: */
1255 	data->role = qports->entry[0].role;
1256 	data->state = qports->entry[0].state;
1257 
1258 	queue_work(card->event_wq, &data->worker);
1259 }
1260 
1261 struct qeth_addr_change_data {
1262 	struct delayed_work dwork;
1263 	struct qeth_card *card;
1264 	struct qeth_ipacmd_addr_change ac_event;
1265 };
1266 
1267 static void qeth_l2_dev2br_worker(struct work_struct *work)
1268 {
1269 	struct delayed_work *dwork = to_delayed_work(work);
1270 	struct qeth_addr_change_data *data;
1271 	struct qeth_card *card;
1272 	struct qeth_priv *priv;
1273 	unsigned int i;
1274 	int rc;
1275 
1276 	data = container_of(dwork, struct qeth_addr_change_data, dwork);
1277 	card = data->card;
1278 	priv = netdev_priv(card->dev);
1279 
1280 	QETH_CARD_TEXT(card, 4, "dev2brew");
1281 
1282 	if (READ_ONCE(card->info.pnso_mode) == QETH_PNSO_NONE)
1283 		goto free;
1284 
1285 	if (data->ac_event.lost_event_mask) {
1286 		/* Potential re-config in progress, try again later: */
1287 		if (!rtnl_trylock()) {
1288 			queue_delayed_work(card->event_wq, dwork,
1289 					   msecs_to_jiffies(100));
1290 			return;
1291 		}
1292 
1293 		if (!netif_device_present(card->dev)) {
1294 			rtnl_unlock();
1295 			goto free;
1296 		}
1297 
1298 		QETH_DBF_MESSAGE(3,
1299 				 "Address change notification overflow on device %x\n",
1300 				 CARD_DEVID(card));
1301 		/* Card fdb and bridge fdb are out of sync, card has stopped
1302 		 * notifications (no need to drain_workqueue). Purge all
1303 		 * 'extern_learn' entries from the parent bridge and restart
1304 		 * the notifications.
1305 		 */
1306 		qeth_l2_dev2br_fdb_flush(card);
1307 		rc = qeth_l2_dev2br_an_set(card, true);
1308 		if (rc) {
1309 			/* TODO: if we want to retry after -EAGAIN, be
1310 			 * aware there could be stale entries in the
1311 			 * workqueue now, that need to be drained.
1312 			 * For now we give up:
1313 			 */
1314 			netdev_err(card->dev,
1315 				   "bridge learning_sync failed to recover: %d\n",
1316 				   rc);
1317 			WRITE_ONCE(card->info.pnso_mode,
1318 				   QETH_PNSO_NONE);
1319 			/* To remove fdb entries reported by an_set: */
1320 			qeth_l2_dev2br_fdb_flush(card);
1321 			priv->brport_features ^= BR_LEARNING_SYNC;
1322 		} else {
1323 			QETH_DBF_MESSAGE(3,
1324 					 "Address Notification resynced on device %x\n",
1325 					 CARD_DEVID(card));
1326 		}
1327 
1328 		rtnl_unlock();
1329 	} else {
1330 		for (i = 0; i < data->ac_event.num_entries; i++) {
1331 			struct qeth_ipacmd_addr_change_entry *entry =
1332 					&data->ac_event.entry[i];
1333 			qeth_l2_dev2br_fdb_notify(card,
1334 						  entry->change_code,
1335 						  &entry->token,
1336 						  &entry->addr_lnid);
1337 		}
1338 	}
1339 
1340 free:
1341 	kfree(data);
1342 }
1343 
1344 static void qeth_addr_change_event_worker(struct work_struct *work)
1345 {
1346 	struct delayed_work *dwork = to_delayed_work(work);
1347 	struct qeth_addr_change_data *data;
1348 	struct qeth_card *card;
1349 	int i;
1350 
1351 	data = container_of(dwork, struct qeth_addr_change_data, dwork);
1352 	card = data->card;
1353 
1354 	QETH_CARD_TEXT(data->card, 4, "adrchgew");
1355 
1356 	if (READ_ONCE(card->info.pnso_mode) == QETH_PNSO_NONE)
1357 		goto free;
1358 
1359 	if (data->ac_event.lost_event_mask) {
1360 		/* Potential re-config in progress, try again later: */
1361 		if (!mutex_trylock(&card->sbp_lock)) {
1362 			queue_delayed_work(card->event_wq, dwork,
1363 					   msecs_to_jiffies(100));
1364 			return;
1365 		}
1366 
1367 		dev_info(&data->card->gdev->dev,
1368 			 "Address change notification stopped on %s (%s)\n",
1369 			 netdev_name(card->dev),
1370 			(data->ac_event.lost_event_mask == 0x01)
1371 			? "Overflow"
1372 			: (data->ac_event.lost_event_mask == 0x02)
1373 			? "Bridge port state change"
1374 			: "Unknown reason");
1375 
1376 		data->card->options.sbp.hostnotification = 0;
1377 		card->info.pnso_mode = QETH_PNSO_NONE;
1378 		mutex_unlock(&data->card->sbp_lock);
1379 		qeth_bridge_emit_host_event(data->card, anev_abort,
1380 					    0, NULL, NULL);
1381 	} else
1382 		for (i = 0; i < data->ac_event.num_entries; i++) {
1383 			struct qeth_ipacmd_addr_change_entry *entry =
1384 					&data->ac_event.entry[i];
1385 			qeth_bridge_emit_host_event(data->card,
1386 						    anev_reg_unreg,
1387 						    entry->change_code,
1388 						    &entry->token,
1389 						    &entry->addr_lnid);
1390 		}
1391 
1392 free:
1393 	kfree(data);
1394 }
1395 
1396 static void qeth_addr_change_event(struct qeth_card *card,
1397 				   struct qeth_ipa_cmd *cmd)
1398 {
1399 	struct qeth_ipacmd_addr_change *hostevs =
1400 		 &cmd->data.addrchange;
1401 	struct qeth_addr_change_data *data;
1402 	int extrasize;
1403 
1404 	if (card->info.pnso_mode == QETH_PNSO_NONE)
1405 		return;
1406 
1407 	QETH_CARD_TEXT(card, 4, "adrchgev");
1408 	if (cmd->hdr.return_code != 0x0000) {
1409 		if (cmd->hdr.return_code == 0x0010) {
1410 			if (hostevs->lost_event_mask == 0x00)
1411 				hostevs->lost_event_mask = 0xff;
1412 		} else {
1413 			QETH_CARD_TEXT_(card, 2, "ACHN%04x",
1414 				cmd->hdr.return_code);
1415 			return;
1416 		}
1417 	}
1418 	extrasize = sizeof(struct qeth_ipacmd_addr_change_entry) *
1419 						hostevs->num_entries;
1420 	data = kzalloc(sizeof(struct qeth_addr_change_data) + extrasize,
1421 		       GFP_ATOMIC);
1422 	if (!data) {
1423 		QETH_CARD_TEXT(card, 2, "ACNalloc");
1424 		return;
1425 	}
1426 	if (card->info.pnso_mode == QETH_PNSO_BRIDGEPORT)
1427 		INIT_DELAYED_WORK(&data->dwork, qeth_addr_change_event_worker);
1428 	else
1429 		INIT_DELAYED_WORK(&data->dwork, qeth_l2_dev2br_worker);
1430 	data->card = card;
1431 	memcpy(&data->ac_event, hostevs,
1432 			sizeof(struct qeth_ipacmd_addr_change) + extrasize);
1433 	queue_delayed_work(card->event_wq, &data->dwork, 0);
1434 }
1435 
1436 /* SETBRIDGEPORT support; sending commands */
1437 
1438 struct _qeth_sbp_cbctl {
1439 	union {
1440 		u32 supported;
1441 		struct {
1442 			enum qeth_sbp_roles *role;
1443 			enum qeth_sbp_states *state;
1444 		} qports;
1445 	} data;
1446 };
1447 
1448 static int qeth_bridgeport_makerc(struct qeth_card *card,
1449 				  struct qeth_ipa_cmd *cmd)
1450 {
1451 	struct qeth_ipacmd_setbridgeport *sbp = &cmd->data.sbp;
1452 	enum qeth_ipa_sbp_cmd setcmd = sbp->hdr.command_code;
1453 	u16 ipa_rc = cmd->hdr.return_code;
1454 	u16 sbp_rc = sbp->hdr.return_code;
1455 	int rc;
1456 
1457 	if (ipa_rc == IPA_RC_SUCCESS && sbp_rc == IPA_RC_SUCCESS)
1458 		return 0;
1459 
1460 	if ((IS_IQD(card) && ipa_rc == IPA_RC_SUCCESS) ||
1461 	    (!IS_IQD(card) && ipa_rc == sbp_rc)) {
1462 		switch (sbp_rc) {
1463 		case IPA_RC_SUCCESS:
1464 			rc = 0;
1465 			break;
1466 		case IPA_RC_L2_UNSUPPORTED_CMD:
1467 		case IPA_RC_UNSUPPORTED_COMMAND:
1468 			rc = -EOPNOTSUPP;
1469 			break;
1470 		case IPA_RC_SBP_OSA_NOT_CONFIGURED:
1471 		case IPA_RC_SBP_IQD_NOT_CONFIGURED:
1472 			rc = -ENODEV; /* maybe not the best code here? */
1473 			dev_err(&card->gdev->dev,
1474 	"The device is not configured as a Bridge Port\n");
1475 			break;
1476 		case IPA_RC_SBP_OSA_OS_MISMATCH:
1477 		case IPA_RC_SBP_IQD_OS_MISMATCH:
1478 			rc = -EPERM;
1479 			dev_err(&card->gdev->dev,
1480 	"A Bridge Port is already configured by a different operating system\n");
1481 			break;
1482 		case IPA_RC_SBP_OSA_ANO_DEV_PRIMARY:
1483 		case IPA_RC_SBP_IQD_ANO_DEV_PRIMARY:
1484 			switch (setcmd) {
1485 			case IPA_SBP_SET_PRIMARY_BRIDGE_PORT:
1486 				rc = -EEXIST;
1487 				dev_err(&card->gdev->dev,
1488 	"The LAN already has a primary Bridge Port\n");
1489 				break;
1490 			case IPA_SBP_SET_SECONDARY_BRIDGE_PORT:
1491 				rc = -EBUSY;
1492 				dev_err(&card->gdev->dev,
1493 	"The device is already a primary Bridge Port\n");
1494 				break;
1495 			default:
1496 				rc = -EIO;
1497 			}
1498 			break;
1499 		case IPA_RC_SBP_OSA_CURRENT_SECOND:
1500 		case IPA_RC_SBP_IQD_CURRENT_SECOND:
1501 			rc = -EBUSY;
1502 			dev_err(&card->gdev->dev,
1503 	"The device is already a secondary Bridge Port\n");
1504 			break;
1505 		case IPA_RC_SBP_OSA_LIMIT_SECOND:
1506 		case IPA_RC_SBP_IQD_LIMIT_SECOND:
1507 			rc = -EEXIST;
1508 			dev_err(&card->gdev->dev,
1509 	"The LAN cannot have more secondary Bridge Ports\n");
1510 			break;
1511 		case IPA_RC_SBP_OSA_CURRENT_PRIMARY:
1512 		case IPA_RC_SBP_IQD_CURRENT_PRIMARY:
1513 			rc = -EBUSY;
1514 			dev_err(&card->gdev->dev,
1515 	"The device is already a primary Bridge Port\n");
1516 			break;
1517 		case IPA_RC_SBP_OSA_NOT_AUTHD_BY_ZMAN:
1518 		case IPA_RC_SBP_IQD_NOT_AUTHD_BY_ZMAN:
1519 			rc = -EACCES;
1520 			dev_err(&card->gdev->dev,
1521 	"The device is not authorized to be a Bridge Port\n");
1522 			break;
1523 		default:
1524 			rc = -EIO;
1525 		}
1526 	} else {
1527 		switch (ipa_rc) {
1528 		case IPA_RC_NOTSUPP:
1529 			rc = -EOPNOTSUPP;
1530 			break;
1531 		case IPA_RC_UNSUPPORTED_COMMAND:
1532 			rc = -EOPNOTSUPP;
1533 			break;
1534 		default:
1535 			rc = -EIO;
1536 		}
1537 	}
1538 
1539 	if (rc) {
1540 		QETH_CARD_TEXT_(card, 2, "SBPi%04x", ipa_rc);
1541 		QETH_CARD_TEXT_(card, 2, "SBPc%04x", sbp_rc);
1542 	}
1543 	return rc;
1544 }
1545 
1546 static struct qeth_cmd_buffer *qeth_sbp_build_cmd(struct qeth_card *card,
1547 						  enum qeth_ipa_sbp_cmd sbp_cmd,
1548 						  unsigned int data_length)
1549 {
1550 	enum qeth_ipa_cmds ipa_cmd = IS_IQD(card) ? IPA_CMD_SETBRIDGEPORT_IQD :
1551 						    IPA_CMD_SETBRIDGEPORT_OSA;
1552 	struct qeth_ipacmd_sbp_hdr *hdr;
1553 	struct qeth_cmd_buffer *iob;
1554 
1555 	iob = qeth_ipa_alloc_cmd(card, ipa_cmd, QETH_PROT_NONE,
1556 				 data_length +
1557 				 offsetof(struct qeth_ipacmd_setbridgeport,
1558 					  data));
1559 	if (!iob)
1560 		return iob;
1561 
1562 	hdr = &__ipa_cmd(iob)->data.sbp.hdr;
1563 	hdr->cmdlength = sizeof(*hdr) + data_length;
1564 	hdr->command_code = sbp_cmd;
1565 	hdr->used_total = 1;
1566 	hdr->seq_no = 1;
1567 	return iob;
1568 }
1569 
1570 static int qeth_bridgeport_query_support_cb(struct qeth_card *card,
1571 	struct qeth_reply *reply, unsigned long data)
1572 {
1573 	struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1574 	struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1575 	int rc;
1576 
1577 	QETH_CARD_TEXT(card, 2, "brqsupcb");
1578 	rc = qeth_bridgeport_makerc(card, cmd);
1579 	if (rc)
1580 		return rc;
1581 
1582 	cbctl->data.supported =
1583 		cmd->data.sbp.data.query_cmds_supp.supported_cmds;
1584 	return 0;
1585 }
1586 
1587 /**
1588  * qeth_bridgeport_query_support() - store bitmask of supported subfunctions.
1589  * @card:			     qeth_card structure pointer.
1590  *
1591  * Sets bitmask of supported setbridgeport subfunctions in the qeth_card
1592  * strucutre: card->options.sbp.supported_funcs.
1593  */
1594 static void qeth_bridgeport_query_support(struct qeth_card *card)
1595 {
1596 	struct qeth_cmd_buffer *iob;
1597 	struct _qeth_sbp_cbctl cbctl;
1598 
1599 	QETH_CARD_TEXT(card, 2, "brqsuppo");
1600 	iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_COMMANDS_SUPPORTED,
1601 				 SBP_DATA_SIZEOF(query_cmds_supp));
1602 	if (!iob)
1603 		return;
1604 
1605 	if (qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_support_cb,
1606 			      &cbctl)) {
1607 		card->options.sbp.role = QETH_SBP_ROLE_NONE;
1608 		card->options.sbp.supported_funcs = 0;
1609 		return;
1610 	}
1611 	card->options.sbp.supported_funcs = cbctl.data.supported;
1612 }
1613 
1614 static int qeth_bridgeport_query_ports_cb(struct qeth_card *card,
1615 	struct qeth_reply *reply, unsigned long data)
1616 {
1617 	struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1618 	struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1619 	struct qeth_sbp_port_data *qports;
1620 	int rc;
1621 
1622 	QETH_CARD_TEXT(card, 2, "brqprtcb");
1623 	rc = qeth_bridgeport_makerc(card, cmd);
1624 	if (rc)
1625 		return rc;
1626 
1627 	qports = &cmd->data.sbp.data.port_data;
1628 	if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1629 		QETH_CARD_TEXT_(card, 2, "SBPs%04x", qports->entry_length);
1630 		return -EINVAL;
1631 	}
1632 	/* first entry contains the state of the local port */
1633 	if (qports->num_entries > 0) {
1634 		if (cbctl->data.qports.role)
1635 			*cbctl->data.qports.role = qports->entry[0].role;
1636 		if (cbctl->data.qports.state)
1637 			*cbctl->data.qports.state = qports->entry[0].state;
1638 	}
1639 	return 0;
1640 }
1641 
1642 /**
1643  * qeth_bridgeport_query_ports() - query local bridgeport status.
1644  * @card:			   qeth_card structure pointer.
1645  * @role:   Role of the port: 0-none, 1-primary, 2-secondary.
1646  * @state:  State of the port: 0-inactive, 1-standby, 2-active.
1647  *
1648  * Returns negative errno-compatible error indication or 0 on success.
1649  *
1650  * 'role' and 'state' are not updated in case of hardware operation failure.
1651  */
1652 int qeth_bridgeport_query_ports(struct qeth_card *card,
1653 	enum qeth_sbp_roles *role, enum qeth_sbp_states *state)
1654 {
1655 	struct qeth_cmd_buffer *iob;
1656 	struct _qeth_sbp_cbctl cbctl = {
1657 		.data = {
1658 			.qports = {
1659 				.role = role,
1660 				.state = state,
1661 			},
1662 		},
1663 	};
1664 
1665 	QETH_CARD_TEXT(card, 2, "brqports");
1666 	if (!(card->options.sbp.supported_funcs & IPA_SBP_QUERY_BRIDGE_PORTS))
1667 		return -EOPNOTSUPP;
1668 	iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_BRIDGE_PORTS, 0);
1669 	if (!iob)
1670 		return -ENOMEM;
1671 
1672 	return qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_ports_cb,
1673 				 &cbctl);
1674 }
1675 
1676 static int qeth_bridgeport_set_cb(struct qeth_card *card,
1677 	struct qeth_reply *reply, unsigned long data)
1678 {
1679 	struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
1680 
1681 	QETH_CARD_TEXT(card, 2, "brsetrcb");
1682 	return qeth_bridgeport_makerc(card, cmd);
1683 }
1684 
1685 /**
1686  * qeth_bridgeport_setrole() - Assign primary role to the port.
1687  * @card:		       qeth_card structure pointer.
1688  * @role:		       Role to assign.
1689  *
1690  * Returns negative errno-compatible error indication or 0 on success.
1691  */
1692 int qeth_bridgeport_setrole(struct qeth_card *card, enum qeth_sbp_roles role)
1693 {
1694 	struct qeth_cmd_buffer *iob;
1695 	enum qeth_ipa_sbp_cmd setcmd;
1696 	unsigned int cmdlength = 0;
1697 
1698 	QETH_CARD_TEXT(card, 2, "brsetrol");
1699 	switch (role) {
1700 	case QETH_SBP_ROLE_NONE:
1701 		setcmd = IPA_SBP_RESET_BRIDGE_PORT_ROLE;
1702 		break;
1703 	case QETH_SBP_ROLE_PRIMARY:
1704 		setcmd = IPA_SBP_SET_PRIMARY_BRIDGE_PORT;
1705 		cmdlength = SBP_DATA_SIZEOF(set_primary);
1706 		break;
1707 	case QETH_SBP_ROLE_SECONDARY:
1708 		setcmd = IPA_SBP_SET_SECONDARY_BRIDGE_PORT;
1709 		break;
1710 	default:
1711 		return -EINVAL;
1712 	}
1713 	if (!(card->options.sbp.supported_funcs & setcmd))
1714 		return -EOPNOTSUPP;
1715 	iob = qeth_sbp_build_cmd(card, setcmd, cmdlength);
1716 	if (!iob)
1717 		return -ENOMEM;
1718 
1719 	return qeth_send_ipa_cmd(card, iob, qeth_bridgeport_set_cb, NULL);
1720 }
1721 
1722 static void qeth_bridgeport_an_set_cb(void *priv,
1723 				      struct chsc_pnso_naid_l2 *entry)
1724 {
1725 	struct qeth_card *card = (struct qeth_card *)priv;
1726 	u8 code;
1727 
1728 	code = IPA_ADDR_CHANGE_CODE_MACADDR;
1729 	if (entry->addr_lnid.lnid < VLAN_N_VID)
1730 		code |= IPA_ADDR_CHANGE_CODE_VLANID;
1731 	qeth_bridge_emit_host_event(card, anev_reg_unreg, code,
1732 				    (struct net_if_token *)&entry->nit,
1733 				    (struct mac_addr_lnid *)&entry->addr_lnid);
1734 }
1735 
1736 /**
1737  * qeth_bridgeport_an_set() - Enable or disable bridgeport address notification
1738  * @card:		      qeth_card structure pointer.
1739  * @enable:		      0 - disable, non-zero - enable notifications
1740  *
1741  * Returns negative errno-compatible error indication or 0 on success.
1742  *
1743  * On enable, emits a series of address notifications udev events for all
1744  * currently registered hosts.
1745  */
1746 int qeth_bridgeport_an_set(struct qeth_card *card, int enable)
1747 {
1748 	int rc;
1749 
1750 	if (!card->options.sbp.supported_funcs)
1751 		return -EOPNOTSUPP;
1752 
1753 	if (enable) {
1754 		qeth_bridge_emit_host_event(card, anev_reset, 0, NULL, NULL);
1755 		qeth_l2_set_pnso_mode(card, QETH_PNSO_BRIDGEPORT);
1756 		rc = qeth_l2_pnso(card, PNSO_OC_NET_BRIDGE_INFO, 1,
1757 				  qeth_bridgeport_an_set_cb, card);
1758 		if (rc)
1759 			qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
1760 	} else {
1761 		rc = qeth_l2_pnso(card, PNSO_OC_NET_BRIDGE_INFO, 0, NULL, NULL);
1762 		qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
1763 	}
1764 	return rc;
1765 }
1766 
1767 /* VNIC Characteristics support */
1768 
1769 /* handle VNICC IPA command return codes; convert to error codes */
1770 static int qeth_l2_vnicc_makerc(struct qeth_card *card, u16 ipa_rc)
1771 {
1772 	int rc;
1773 
1774 	switch (ipa_rc) {
1775 	case IPA_RC_SUCCESS:
1776 		return ipa_rc;
1777 	case IPA_RC_L2_UNSUPPORTED_CMD:
1778 	case IPA_RC_NOTSUPP:
1779 		rc = -EOPNOTSUPP;
1780 		break;
1781 	case IPA_RC_VNICC_OOSEQ:
1782 		rc = -EALREADY;
1783 		break;
1784 	case IPA_RC_VNICC_VNICBP:
1785 		rc = -EBUSY;
1786 		break;
1787 	case IPA_RC_L2_ADDR_TABLE_FULL:
1788 		rc = -ENOSPC;
1789 		break;
1790 	case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
1791 		rc = -EACCES;
1792 		break;
1793 	default:
1794 		rc = -EIO;
1795 	}
1796 
1797 	QETH_CARD_TEXT_(card, 2, "err%04x", ipa_rc);
1798 	return rc;
1799 }
1800 
1801 /* generic VNICC request call back */
1802 static int qeth_l2_vnicc_request_cb(struct qeth_card *card,
1803 				    struct qeth_reply *reply,
1804 				    unsigned long data)
1805 {
1806 	struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1807 	struct qeth_ipacmd_vnicc *rep = &cmd->data.vnicc;
1808 	u32 sub_cmd = cmd->data.vnicc.hdr.sub_command;
1809 
1810 	QETH_CARD_TEXT(card, 2, "vniccrcb");
1811 	if (cmd->hdr.return_code)
1812 		return qeth_l2_vnicc_makerc(card, cmd->hdr.return_code);
1813 	/* return results to caller */
1814 	card->options.vnicc.sup_chars = rep->vnicc_cmds.supported;
1815 	card->options.vnicc.cur_chars = rep->vnicc_cmds.enabled;
1816 
1817 	if (sub_cmd == IPA_VNICC_QUERY_CMDS)
1818 		*(u32 *)reply->param = rep->data.query_cmds.sup_cmds;
1819 	else if (sub_cmd == IPA_VNICC_GET_TIMEOUT)
1820 		*(u32 *)reply->param = rep->data.getset_timeout.timeout;
1821 
1822 	return 0;
1823 }
1824 
1825 static struct qeth_cmd_buffer *qeth_l2_vnicc_build_cmd(struct qeth_card *card,
1826 						       u32 vnicc_cmd,
1827 						       unsigned int data_length)
1828 {
1829 	struct qeth_ipacmd_vnicc_hdr *hdr;
1830 	struct qeth_cmd_buffer *iob;
1831 
1832 	iob = qeth_ipa_alloc_cmd(card, IPA_CMD_VNICC, QETH_PROT_NONE,
1833 				 data_length +
1834 				 offsetof(struct qeth_ipacmd_vnicc, data));
1835 	if (!iob)
1836 		return NULL;
1837 
1838 	hdr = &__ipa_cmd(iob)->data.vnicc.hdr;
1839 	hdr->data_length = sizeof(*hdr) + data_length;
1840 	hdr->sub_command = vnicc_cmd;
1841 	return iob;
1842 }
1843 
1844 /* VNICC query VNIC characteristics request */
1845 static int qeth_l2_vnicc_query_chars(struct qeth_card *card)
1846 {
1847 	struct qeth_cmd_buffer *iob;
1848 
1849 	QETH_CARD_TEXT(card, 2, "vniccqch");
1850 	iob = qeth_l2_vnicc_build_cmd(card, IPA_VNICC_QUERY_CHARS, 0);
1851 	if (!iob)
1852 		return -ENOMEM;
1853 
1854 	return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, NULL);
1855 }
1856 
1857 /* VNICC query sub commands request */
1858 static int qeth_l2_vnicc_query_cmds(struct qeth_card *card, u32 vnic_char,
1859 				    u32 *sup_cmds)
1860 {
1861 	struct qeth_cmd_buffer *iob;
1862 
1863 	QETH_CARD_TEXT(card, 2, "vniccqcm");
1864 	iob = qeth_l2_vnicc_build_cmd(card, IPA_VNICC_QUERY_CMDS,
1865 				      VNICC_DATA_SIZEOF(query_cmds));
1866 	if (!iob)
1867 		return -ENOMEM;
1868 
1869 	__ipa_cmd(iob)->data.vnicc.data.query_cmds.vnic_char = vnic_char;
1870 
1871 	return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, sup_cmds);
1872 }
1873 
1874 /* VNICC enable/disable characteristic request */
1875 static int qeth_l2_vnicc_set_char(struct qeth_card *card, u32 vnic_char,
1876 				      u32 cmd)
1877 {
1878 	struct qeth_cmd_buffer *iob;
1879 
1880 	QETH_CARD_TEXT(card, 2, "vniccedc");
1881 	iob = qeth_l2_vnicc_build_cmd(card, cmd, VNICC_DATA_SIZEOF(set_char));
1882 	if (!iob)
1883 		return -ENOMEM;
1884 
1885 	__ipa_cmd(iob)->data.vnicc.data.set_char.vnic_char = vnic_char;
1886 
1887 	return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, NULL);
1888 }
1889 
1890 /* VNICC get/set timeout for characteristic request */
1891 static int qeth_l2_vnicc_getset_timeout(struct qeth_card *card, u32 vnicc,
1892 					u32 cmd, u32 *timeout)
1893 {
1894 	struct qeth_vnicc_getset_timeout *getset_timeout;
1895 	struct qeth_cmd_buffer *iob;
1896 
1897 	QETH_CARD_TEXT(card, 2, "vniccgst");
1898 	iob = qeth_l2_vnicc_build_cmd(card, cmd,
1899 				      VNICC_DATA_SIZEOF(getset_timeout));
1900 	if (!iob)
1901 		return -ENOMEM;
1902 
1903 	getset_timeout = &__ipa_cmd(iob)->data.vnicc.data.getset_timeout;
1904 	getset_timeout->vnic_char = vnicc;
1905 
1906 	if (cmd == IPA_VNICC_SET_TIMEOUT)
1907 		getset_timeout->timeout = *timeout;
1908 
1909 	return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, timeout);
1910 }
1911 
1912 /* recover user timeout setting */
1913 static bool qeth_l2_vnicc_recover_timeout(struct qeth_card *card, u32 vnicc,
1914 					  u32 *timeout)
1915 {
1916 	if (card->options.vnicc.sup_chars & vnicc &&
1917 	    card->options.vnicc.getset_timeout_sup & vnicc &&
1918 	    !qeth_l2_vnicc_getset_timeout(card, vnicc, IPA_VNICC_SET_TIMEOUT,
1919 					  timeout))
1920 		return false;
1921 	*timeout = QETH_VNICC_DEFAULT_TIMEOUT;
1922 	return true;
1923 }
1924 
1925 /* set current VNICC flag state; called from sysfs store function */
1926 int qeth_l2_vnicc_set_state(struct qeth_card *card, u32 vnicc, bool state)
1927 {
1928 	int rc = 0;
1929 	u32 cmd;
1930 
1931 	QETH_CARD_TEXT(card, 2, "vniccsch");
1932 
1933 	/* check if characteristic and enable/disable are supported */
1934 	if (!(card->options.vnicc.sup_chars & vnicc) ||
1935 	    !(card->options.vnicc.set_char_sup & vnicc))
1936 		return -EOPNOTSUPP;
1937 
1938 	if (qeth_bridgeport_is_in_use(card))
1939 		return -EBUSY;
1940 
1941 	/* set enable/disable command and store wanted characteristic */
1942 	if (state) {
1943 		cmd = IPA_VNICC_ENABLE;
1944 		card->options.vnicc.wanted_chars |= vnicc;
1945 	} else {
1946 		cmd = IPA_VNICC_DISABLE;
1947 		card->options.vnicc.wanted_chars &= ~vnicc;
1948 	}
1949 
1950 	/* do we need to do anything? */
1951 	if (card->options.vnicc.cur_chars == card->options.vnicc.wanted_chars)
1952 		return rc;
1953 
1954 	/* if card is not ready, simply stop here */
1955 	if (!qeth_card_hw_is_reachable(card)) {
1956 		if (state)
1957 			card->options.vnicc.cur_chars |= vnicc;
1958 		else
1959 			card->options.vnicc.cur_chars &= ~vnicc;
1960 		return rc;
1961 	}
1962 
1963 	rc = qeth_l2_vnicc_set_char(card, vnicc, cmd);
1964 	if (rc)
1965 		card->options.vnicc.wanted_chars =
1966 			card->options.vnicc.cur_chars;
1967 	else {
1968 		/* successful online VNICC change; handle special cases */
1969 		if (state && vnicc == QETH_VNICC_RX_BCAST)
1970 			card->options.vnicc.rx_bcast_enabled = true;
1971 		if (!state && vnicc == QETH_VNICC_LEARNING)
1972 			qeth_l2_vnicc_recover_timeout(card, vnicc,
1973 					&card->options.vnicc.learning_timeout);
1974 	}
1975 
1976 	return rc;
1977 }
1978 
1979 /* get current VNICC flag state; called from sysfs show function */
1980 int qeth_l2_vnicc_get_state(struct qeth_card *card, u32 vnicc, bool *state)
1981 {
1982 	int rc = 0;
1983 
1984 	QETH_CARD_TEXT(card, 2, "vniccgch");
1985 
1986 	/* check if characteristic is supported */
1987 	if (!(card->options.vnicc.sup_chars & vnicc))
1988 		return -EOPNOTSUPP;
1989 
1990 	if (qeth_bridgeport_is_in_use(card))
1991 		return -EBUSY;
1992 
1993 	/* if card is ready, query current VNICC state */
1994 	if (qeth_card_hw_is_reachable(card))
1995 		rc = qeth_l2_vnicc_query_chars(card);
1996 
1997 	*state = (card->options.vnicc.cur_chars & vnicc) ? true : false;
1998 	return rc;
1999 }
2000 
2001 /* set VNICC timeout; called from sysfs store function. Currently, only learning
2002  * supports timeout
2003  */
2004 int qeth_l2_vnicc_set_timeout(struct qeth_card *card, u32 timeout)
2005 {
2006 	int rc = 0;
2007 
2008 	QETH_CARD_TEXT(card, 2, "vniccsto");
2009 
2010 	/* check if characteristic and set_timeout are supported */
2011 	if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
2012 	    !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
2013 		return -EOPNOTSUPP;
2014 
2015 	if (qeth_bridgeport_is_in_use(card))
2016 		return -EBUSY;
2017 
2018 	/* do we need to do anything? */
2019 	if (card->options.vnicc.learning_timeout == timeout)
2020 		return rc;
2021 
2022 	/* if card is not ready, simply store the value internally and return */
2023 	if (!qeth_card_hw_is_reachable(card)) {
2024 		card->options.vnicc.learning_timeout = timeout;
2025 		return rc;
2026 	}
2027 
2028 	/* send timeout value to card; if successful, store value internally */
2029 	rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
2030 					  IPA_VNICC_SET_TIMEOUT, &timeout);
2031 	if (!rc)
2032 		card->options.vnicc.learning_timeout = timeout;
2033 
2034 	return rc;
2035 }
2036 
2037 /* get current VNICC timeout; called from sysfs show function. Currently, only
2038  * learning supports timeout
2039  */
2040 int qeth_l2_vnicc_get_timeout(struct qeth_card *card, u32 *timeout)
2041 {
2042 	int rc = 0;
2043 
2044 	QETH_CARD_TEXT(card, 2, "vniccgto");
2045 
2046 	/* check if characteristic and get_timeout are supported */
2047 	if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
2048 	    !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
2049 		return -EOPNOTSUPP;
2050 
2051 	if (qeth_bridgeport_is_in_use(card))
2052 		return -EBUSY;
2053 
2054 	/* if card is ready, get timeout. Otherwise, just return stored value */
2055 	*timeout = card->options.vnicc.learning_timeout;
2056 	if (qeth_card_hw_is_reachable(card))
2057 		rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
2058 						  IPA_VNICC_GET_TIMEOUT,
2059 						  timeout);
2060 
2061 	return rc;
2062 }
2063 
2064 /* check if VNICC is currently enabled */
2065 static bool _qeth_l2_vnicc_is_in_use(struct qeth_card *card)
2066 {
2067 	if (!card->options.vnicc.sup_chars)
2068 		return false;
2069 	/* default values are only OK if rx_bcast was not enabled by user
2070 	 * or the card is offline.
2071 	 */
2072 	if (card->options.vnicc.cur_chars == QETH_VNICC_DEFAULT) {
2073 		if (!card->options.vnicc.rx_bcast_enabled ||
2074 		    !qeth_card_hw_is_reachable(card))
2075 			return false;
2076 	}
2077 	return true;
2078 }
2079 
2080 /**
2081  *	qeth_bridgeport_allowed - are any qeth_bridgeport functions allowed?
2082  *	@card: qeth_card structure pointer
2083  *
2084  *	qeth_bridgeport functionality is mutually exclusive with usage of the
2085  *	VNIC Characteristics and dev2br address notifications
2086  */
2087 bool qeth_bridgeport_allowed(struct qeth_card *card)
2088 {
2089 	struct qeth_priv *priv = netdev_priv(card->dev);
2090 
2091 	return (!_qeth_l2_vnicc_is_in_use(card) &&
2092 		!(priv->brport_features & BR_LEARNING_SYNC));
2093 }
2094 
2095 /* recover user characteristic setting */
2096 static bool qeth_l2_vnicc_recover_char(struct qeth_card *card, u32 vnicc,
2097 				       bool enable)
2098 {
2099 	u32 cmd = enable ? IPA_VNICC_ENABLE : IPA_VNICC_DISABLE;
2100 
2101 	if (card->options.vnicc.sup_chars & vnicc &&
2102 	    card->options.vnicc.set_char_sup & vnicc &&
2103 	    !qeth_l2_vnicc_set_char(card, vnicc, cmd))
2104 		return false;
2105 	card->options.vnicc.wanted_chars &= ~vnicc;
2106 	card->options.vnicc.wanted_chars |= QETH_VNICC_DEFAULT & vnicc;
2107 	return true;
2108 }
2109 
2110 /* (re-)initialize VNICC */
2111 static void qeth_l2_vnicc_init(struct qeth_card *card)
2112 {
2113 	u32 *timeout = &card->options.vnicc.learning_timeout;
2114 	bool enable, error = false;
2115 	unsigned int chars_len, i;
2116 	unsigned long chars_tmp;
2117 	u32 sup_cmds, vnicc;
2118 
2119 	QETH_CARD_TEXT(card, 2, "vniccini");
2120 	/* reset rx_bcast */
2121 	card->options.vnicc.rx_bcast_enabled = 0;
2122 	/* initial query and storage of VNIC characteristics */
2123 	if (qeth_l2_vnicc_query_chars(card)) {
2124 		if (card->options.vnicc.wanted_chars != QETH_VNICC_DEFAULT ||
2125 		    *timeout != QETH_VNICC_DEFAULT_TIMEOUT)
2126 			dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
2127 		/* fail quietly if user didn't change the default config */
2128 		card->options.vnicc.sup_chars = 0;
2129 		card->options.vnicc.cur_chars = 0;
2130 		card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
2131 		return;
2132 	}
2133 	/* get supported commands for each supported characteristic */
2134 	chars_tmp = card->options.vnicc.sup_chars;
2135 	chars_len = sizeof(card->options.vnicc.sup_chars) * BITS_PER_BYTE;
2136 	for_each_set_bit(i, &chars_tmp, chars_len) {
2137 		vnicc = BIT(i);
2138 		if (qeth_l2_vnicc_query_cmds(card, vnicc, &sup_cmds)) {
2139 			sup_cmds = 0;
2140 			error = true;
2141 		}
2142 		if ((sup_cmds & IPA_VNICC_SET_TIMEOUT) &&
2143 		    (sup_cmds & IPA_VNICC_GET_TIMEOUT))
2144 			card->options.vnicc.getset_timeout_sup |= vnicc;
2145 		else
2146 			card->options.vnicc.getset_timeout_sup &= ~vnicc;
2147 		if ((sup_cmds & IPA_VNICC_ENABLE) &&
2148 		    (sup_cmds & IPA_VNICC_DISABLE))
2149 			card->options.vnicc.set_char_sup |= vnicc;
2150 		else
2151 			card->options.vnicc.set_char_sup &= ~vnicc;
2152 	}
2153 	/* enforce assumed default values and recover settings, if changed  */
2154 	error |= qeth_l2_vnicc_recover_timeout(card, QETH_VNICC_LEARNING,
2155 					       timeout);
2156 	/* Change chars, if necessary  */
2157 	chars_tmp = card->options.vnicc.wanted_chars ^
2158 		    card->options.vnicc.cur_chars;
2159 	chars_len = sizeof(card->options.vnicc.wanted_chars) * BITS_PER_BYTE;
2160 	for_each_set_bit(i, &chars_tmp, chars_len) {
2161 		vnicc = BIT(i);
2162 		enable = card->options.vnicc.wanted_chars & vnicc;
2163 		error |= qeth_l2_vnicc_recover_char(card, vnicc, enable);
2164 	}
2165 	if (error)
2166 		dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
2167 }
2168 
2169 /* configure default values of VNIC characteristics */
2170 static void qeth_l2_vnicc_set_defaults(struct qeth_card *card)
2171 {
2172 	/* characteristics values */
2173 	card->options.vnicc.sup_chars = QETH_VNICC_ALL;
2174 	card->options.vnicc.cur_chars = QETH_VNICC_DEFAULT;
2175 	card->options.vnicc.learning_timeout = QETH_VNICC_DEFAULT_TIMEOUT;
2176 	/* supported commands */
2177 	card->options.vnicc.set_char_sup = QETH_VNICC_ALL;
2178 	card->options.vnicc.getset_timeout_sup = QETH_VNICC_LEARNING;
2179 	/* settings wanted by users */
2180 	card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
2181 }
2182 
2183 static const struct device_type qeth_l2_devtype = {
2184 	.name = "qeth_layer2",
2185 	.groups = qeth_l2_attr_groups,
2186 };
2187 
2188 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
2189 {
2190 	struct qeth_card *card = dev_get_drvdata(&gdev->dev);
2191 	int rc;
2192 
2193 	if (IS_OSN(card))
2194 		dev_notice(&gdev->dev, "OSN support will be dropped in 2021\n");
2195 
2196 	qeth_l2_vnicc_set_defaults(card);
2197 	mutex_init(&card->sbp_lock);
2198 
2199 	if (gdev->dev.type == &qeth_generic_devtype) {
2200 		rc = device_add_groups(&gdev->dev, qeth_l2_attr_groups);
2201 		if (rc)
2202 			return rc;
2203 	}
2204 
2205 	INIT_WORK(&card->rx_mode_work, qeth_l2_rx_mode_work);
2206 	return 0;
2207 }
2208 
2209 static void qeth_l2_remove_device(struct ccwgroup_device *gdev)
2210 {
2211 	struct qeth_card *card = dev_get_drvdata(&gdev->dev);
2212 
2213 	if (gdev->dev.type == &qeth_generic_devtype)
2214 		device_remove_groups(&gdev->dev, qeth_l2_attr_groups);
2215 	qeth_set_allowed_threads(card, 0, 1);
2216 	wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
2217 
2218 	if (gdev->state == CCWGROUP_ONLINE)
2219 		qeth_set_offline(card, card->discipline, false);
2220 
2221 	cancel_work_sync(&card->close_dev_work);
2222 	if (card->dev->reg_state == NETREG_REGISTERED)
2223 		unregister_netdev(card->dev);
2224 }
2225 
2226 static int qeth_l2_set_online(struct qeth_card *card, bool carrier_ok)
2227 {
2228 	struct net_device *dev = card->dev;
2229 	int rc = 0;
2230 
2231 	qeth_l2_detect_dev2br_support(card);
2232 
2233 	mutex_lock(&card->sbp_lock);
2234 	qeth_bridgeport_query_support(card);
2235 	if (card->options.sbp.supported_funcs) {
2236 		qeth_l2_setup_bridgeport_attrs(card);
2237 		dev_info(&card->gdev->dev,
2238 			 "The device represents a Bridge Capable Port\n");
2239 	}
2240 	mutex_unlock(&card->sbp_lock);
2241 
2242 	qeth_l2_register_dev_addr(card);
2243 
2244 	/* for the rx_bcast characteristic, init VNICC after setmac */
2245 	qeth_l2_vnicc_init(card);
2246 
2247 	qeth_l2_trace_features(card);
2248 
2249 	/* softsetup */
2250 	QETH_CARD_TEXT(card, 2, "softsetp");
2251 
2252 	card->state = CARD_STATE_SOFTSETUP;
2253 
2254 	qeth_set_allowed_threads(card, 0xffffffff, 0);
2255 
2256 	if (dev->reg_state != NETREG_REGISTERED) {
2257 		rc = qeth_l2_setup_netdev(card);
2258 		if (rc)
2259 			goto err_setup;
2260 
2261 		if (carrier_ok)
2262 			netif_carrier_on(dev);
2263 	} else {
2264 		rtnl_lock();
2265 		rc = qeth_set_real_num_tx_queues(card,
2266 						 qeth_tx_actual_queues(card));
2267 		if (rc) {
2268 			rtnl_unlock();
2269 			goto err_set_queues;
2270 		}
2271 
2272 		if (carrier_ok)
2273 			netif_carrier_on(dev);
2274 		else
2275 			netif_carrier_off(dev);
2276 
2277 		netif_device_attach(dev);
2278 		qeth_enable_hw_features(dev);
2279 		qeth_l2_enable_brport_features(card);
2280 
2281 		if (card->info.open_when_online) {
2282 			card->info.open_when_online = 0;
2283 			dev_open(dev, NULL);
2284 		}
2285 		rtnl_unlock();
2286 	}
2287 	return 0;
2288 
2289 err_set_queues:
2290 err_setup:
2291 	qeth_set_allowed_threads(card, 0, 1);
2292 	card->state = CARD_STATE_DOWN;
2293 	return rc;
2294 }
2295 
2296 static void qeth_l2_set_offline(struct qeth_card *card)
2297 {
2298 	struct qeth_priv *priv = netdev_priv(card->dev);
2299 
2300 	qeth_set_allowed_threads(card, 0, 1);
2301 	qeth_l2_drain_rx_mode_cache(card);
2302 
2303 	if (card->state == CARD_STATE_SOFTSETUP)
2304 		card->state = CARD_STATE_DOWN;
2305 
2306 	qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
2307 	if (priv->brport_features & BR_LEARNING_SYNC)
2308 		qeth_l2_dev2br_fdb_flush(card);
2309 }
2310 
2311 /* Returns zero if the command is successfully "consumed" */
2312 static int qeth_l2_control_event(struct qeth_card *card,
2313 				 struct qeth_ipa_cmd *cmd)
2314 {
2315 	switch (cmd->hdr.command) {
2316 	case IPA_CMD_SETBRIDGEPORT_OSA:
2317 	case IPA_CMD_SETBRIDGEPORT_IQD:
2318 		if (cmd->data.sbp.hdr.command_code ==
2319 		    IPA_SBP_BRIDGE_PORT_STATE_CHANGE) {
2320 			qeth_bridge_state_change(card, cmd);
2321 			return 0;
2322 		}
2323 
2324 		return 1;
2325 	case IPA_CMD_ADDRESS_CHANGE_NOTIF:
2326 		qeth_addr_change_event(card, cmd);
2327 		return 0;
2328 	default:
2329 		return 1;
2330 	}
2331 }
2332 
2333 const struct qeth_discipline qeth_l2_discipline = {
2334 	.devtype = &qeth_l2_devtype,
2335 	.setup = qeth_l2_probe_device,
2336 	.remove = qeth_l2_remove_device,
2337 	.set_online = qeth_l2_set_online,
2338 	.set_offline = qeth_l2_set_offline,
2339 	.do_ioctl = NULL,
2340 	.control_event_handler = qeth_l2_control_event,
2341 };
2342 EXPORT_SYMBOL_GPL(qeth_l2_discipline);
2343 
2344 static int __init qeth_l2_init(void)
2345 {
2346 	pr_info("register layer 2 discipline\n");
2347 	return 0;
2348 }
2349 
2350 static void __exit qeth_l2_exit(void)
2351 {
2352 	pr_info("unregister layer 2 discipline\n");
2353 }
2354 
2355 module_init(qeth_l2_init);
2356 module_exit(qeth_l2_exit);
2357 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
2358 MODULE_DESCRIPTION("qeth layer 2 discipline");
2359 MODULE_LICENSE("GPL");
2360