xref: /openbmc/linux/drivers/s390/net/qeth_l2_main.c (revision 1cfef80d)
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 
qeth_l2_setdelmac_makerc(struct qeth_card * card,u16 retcode)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 
qeth_l2_send_setdelmac_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)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 
qeth_l2_send_setdelmac(struct qeth_card * card,const __u8 * mac,enum qeth_ipa_cmds ipacmd)74 static int qeth_l2_send_setdelmac(struct qeth_card *card, const __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 
qeth_l2_send_setmac(struct qeth_card * card,const __u8 * mac)91 static int qeth_l2_send_setmac(struct qeth_card *card, const __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 
qeth_l2_write_mac(struct qeth_card * card,u8 * mac)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 address %012llx is already registered on device %x\n",
125 				 ether_addr_to_u64(mac), CARD_DEVID(card));
126 	else if (rc)
127 		QETH_DBF_MESSAGE(2, "Failed to register MAC address %012llx on device %x: %d\n",
128 				 ether_addr_to_u64(mac), CARD_DEVID(card), rc);
129 	return rc;
130 }
131 
qeth_l2_remove_mac(struct qeth_card * card,u8 * mac)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 address %012llx on device %x: %d\n",
142 				 ether_addr_to_u64(mac), CARD_DEVID(card), rc);
143 	return rc;
144 }
145 
qeth_l2_drain_rx_mode_cache(struct qeth_card * card)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 
qeth_l2_fill_header(struct qeth_qdio_out_q * queue,struct qeth_hdr * hdr,struct sk_buff * skb,__be16 proto,unsigned int data_len)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 
qeth_l2_setdelvlan_makerc(struct qeth_card * card,u16 retcode)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 
qeth_l2_send_setdelvlan_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)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 
qeth_l2_send_setdelvlan(struct qeth_card * card,__u16 i,enum qeth_ipa_cmds ipacmd)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 
qeth_l2_vlan_rx_add_vid(struct net_device * dev,__be16 proto,u16 vid)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 
qeth_l2_vlan_rx_kill_vid(struct net_device * dev,__be16 proto,u16 vid)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 
qeth_l2_set_pnso_mode(struct qeth_card * card,enum qeth_pnso_mode mode)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 
qeth_l2_dev2br_fdb_flush(struct qeth_card * card)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 
qeth_l2_request_initial_mac(struct qeth_card * card)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 	rc = qeth_setadpparms_change_macaddr(card);
313 	if (!rc)
314 		goto out;
315 	QETH_DBF_MESSAGE(2, "READ_MAC Assist failed on device %x: %#x\n",
316 			 CARD_DEVID(card), rc);
317 	QETH_CARD_TEXT_(card, 2, "1err%04x", rc);
318 
319 	/* Fall back once more, but some devices don't support a custom MAC
320 	 * address:
321 	 */
322 	if (IS_OSM(card) || IS_OSX(card))
323 		return (rc) ? rc : -EADDRNOTAVAIL;
324 	eth_hw_addr_random(card->dev);
325 
326 out:
327 	QETH_CARD_HEX(card, 2, card->dev->dev_addr, card->dev->addr_len);
328 	return 0;
329 }
330 
qeth_l2_register_dev_addr(struct qeth_card * card)331 static void qeth_l2_register_dev_addr(struct qeth_card *card)
332 {
333 	if (!is_valid_ether_addr(card->dev->dev_addr))
334 		qeth_l2_request_initial_mac(card);
335 
336 	if (!qeth_l2_send_setmac(card, card->dev->dev_addr))
337 		card->info.dev_addr_is_registered = 1;
338 	else
339 		card->info.dev_addr_is_registered = 0;
340 }
341 
qeth_l2_validate_addr(struct net_device * dev)342 static int qeth_l2_validate_addr(struct net_device *dev)
343 {
344 	struct qeth_card *card = dev->ml_priv;
345 
346 	if (card->info.dev_addr_is_registered)
347 		return eth_validate_addr(dev);
348 
349 	QETH_CARD_TEXT(card, 4, "nomacadr");
350 	return -EPERM;
351 }
352 
qeth_l2_set_mac_address(struct net_device * dev,void * p)353 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
354 {
355 	struct sockaddr *addr = p;
356 	struct qeth_card *card = dev->ml_priv;
357 	u8 old_addr[ETH_ALEN];
358 	int rc = 0;
359 
360 	QETH_CARD_TEXT(card, 3, "setmac");
361 
362 	if (IS_OSM(card) || IS_OSX(card)) {
363 		QETH_CARD_TEXT(card, 3, "setmcTYP");
364 		return -EOPNOTSUPP;
365 	}
366 	QETH_CARD_HEX(card, 3, addr->sa_data, ETH_ALEN);
367 	if (!is_valid_ether_addr(addr->sa_data))
368 		return -EADDRNOTAVAIL;
369 
370 	/* don't register the same address twice */
371 	if (ether_addr_equal_64bits(dev->dev_addr, addr->sa_data) &&
372 	    card->info.dev_addr_is_registered)
373 		return 0;
374 
375 	/* add the new address, switch over, drop the old */
376 	rc = qeth_l2_send_setmac(card, addr->sa_data);
377 	if (rc)
378 		return rc;
379 	ether_addr_copy(old_addr, dev->dev_addr);
380 	eth_hw_addr_set(dev, addr->sa_data);
381 
382 	if (card->info.dev_addr_is_registered)
383 		qeth_l2_remove_mac(card, old_addr);
384 	card->info.dev_addr_is_registered = 1;
385 	return 0;
386 }
387 
qeth_l2_promisc_to_bridge(struct qeth_card * card,bool enable)388 static void qeth_l2_promisc_to_bridge(struct qeth_card *card, bool enable)
389 {
390 	int role;
391 	int rc;
392 
393 	QETH_CARD_TEXT(card, 3, "pmisc2br");
394 
395 	if (enable) {
396 		if (card->options.sbp.reflect_promisc_primary)
397 			role = QETH_SBP_ROLE_PRIMARY;
398 		else
399 			role = QETH_SBP_ROLE_SECONDARY;
400 	} else
401 		role = QETH_SBP_ROLE_NONE;
402 
403 	rc = qeth_bridgeport_setrole(card, role);
404 	QETH_CARD_TEXT_(card, 2, "bpm%c%04x", enable ? '+' : '-', rc);
405 	if (!rc) {
406 		card->options.sbp.role = role;
407 		card->info.promisc_mode = enable;
408 	}
409 }
410 
qeth_l2_set_promisc_mode(struct qeth_card * card)411 static void qeth_l2_set_promisc_mode(struct qeth_card *card)
412 {
413 	bool enable = card->dev->flags & IFF_PROMISC;
414 
415 	if (card->info.promisc_mode == enable)
416 		return;
417 
418 	if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE)) {
419 		qeth_setadp_promisc_mode(card, enable);
420 	} else {
421 		mutex_lock(&card->sbp_lock);
422 		if (card->options.sbp.reflect_promisc)
423 			qeth_l2_promisc_to_bridge(card, enable);
424 		mutex_unlock(&card->sbp_lock);
425 	}
426 }
427 
428 /* New MAC address is added to the hash table and marked to be written on card
429  * only if there is not in the hash table storage already
430  *
431 */
qeth_l2_add_mac(struct qeth_card * card,struct netdev_hw_addr * ha)432 static void qeth_l2_add_mac(struct qeth_card *card, struct netdev_hw_addr *ha)
433 {
434 	u32 mac_hash = get_unaligned((u32 *)(&ha->addr[2]));
435 	struct qeth_mac *mac;
436 
437 	hash_for_each_possible(card->rx_mode_addrs, mac, hnode, mac_hash) {
438 		if (ether_addr_equal_64bits(ha->addr, mac->mac_addr)) {
439 			mac->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
440 			return;
441 		}
442 	}
443 
444 	mac = kzalloc(sizeof(struct qeth_mac), GFP_ATOMIC);
445 	if (!mac)
446 		return;
447 
448 	ether_addr_copy(mac->mac_addr, ha->addr);
449 	mac->disp_flag = QETH_DISP_ADDR_ADD;
450 
451 	hash_add(card->rx_mode_addrs, &mac->hnode, mac_hash);
452 }
453 
qeth_l2_rx_mode_work(struct work_struct * work)454 static void qeth_l2_rx_mode_work(struct work_struct *work)
455 {
456 	struct qeth_card *card = container_of(work, struct qeth_card,
457 					      rx_mode_work);
458 	struct net_device *dev = card->dev;
459 	struct netdev_hw_addr *ha;
460 	struct qeth_mac *mac;
461 	struct hlist_node *tmp;
462 	int i;
463 	int rc;
464 
465 	QETH_CARD_TEXT(card, 3, "setmulti");
466 
467 	netif_addr_lock_bh(dev);
468 	netdev_for_each_mc_addr(ha, dev)
469 		qeth_l2_add_mac(card, ha);
470 	netdev_for_each_uc_addr(ha, dev)
471 		qeth_l2_add_mac(card, ha);
472 	netif_addr_unlock_bh(dev);
473 
474 	hash_for_each_safe(card->rx_mode_addrs, i, tmp, mac, hnode) {
475 		switch (mac->disp_flag) {
476 		case QETH_DISP_ADDR_DELETE:
477 			qeth_l2_remove_mac(card, mac->mac_addr);
478 			hash_del(&mac->hnode);
479 			kfree(mac);
480 			break;
481 		case QETH_DISP_ADDR_ADD:
482 			rc = qeth_l2_write_mac(card, mac->mac_addr);
483 			if (rc) {
484 				hash_del(&mac->hnode);
485 				kfree(mac);
486 				break;
487 			}
488 			fallthrough;
489 		default:
490 			/* for next call to set_rx_mode(): */
491 			mac->disp_flag = QETH_DISP_ADDR_DELETE;
492 		}
493 	}
494 
495 	qeth_l2_set_promisc_mode(card);
496 }
497 
qeth_l2_hard_start_xmit(struct sk_buff * skb,struct net_device * dev)498 static netdev_tx_t qeth_l2_hard_start_xmit(struct sk_buff *skb,
499 					   struct net_device *dev)
500 {
501 	struct qeth_card *card = dev->ml_priv;
502 	u16 txq = skb_get_queue_mapping(skb);
503 	struct qeth_qdio_out_q *queue;
504 	int rc;
505 
506 	if (!skb_is_gso(skb))
507 		qdisc_skb_cb(skb)->pkt_len = skb->len;
508 	if (IS_IQD(card))
509 		txq = qeth_iqd_translate_txq(dev, txq);
510 	queue = card->qdio.out_qs[txq];
511 
512 	rc = qeth_xmit(card, skb, queue, vlan_get_protocol(skb),
513 		       qeth_l2_fill_header);
514 	if (!rc)
515 		return NETDEV_TX_OK;
516 
517 	QETH_TXQ_STAT_INC(queue, tx_dropped);
518 	kfree_skb(skb);
519 	return NETDEV_TX_OK;
520 }
521 
qeth_l2_iqd_select_queue(struct net_device * dev,struct sk_buff * skb,struct net_device * sb_dev)522 static u16 qeth_l2_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
523 				    struct net_device *sb_dev)
524 {
525 	return qeth_iqd_select_queue(dev, skb, qeth_get_ether_cast_type(skb),
526 				     sb_dev);
527 }
528 
qeth_l2_set_rx_mode(struct net_device * dev)529 static void qeth_l2_set_rx_mode(struct net_device *dev)
530 {
531 	struct qeth_card *card = dev->ml_priv;
532 
533 	schedule_work(&card->rx_mode_work);
534 }
535 
536 /**
537  *	qeth_l2_pnso() - perform network subchannel operation
538  *	@card: qeth_card structure pointer
539  *	@oc: Operation Code
540  *	@cnc: Boolean Change-Notification Control
541  *	@cb: Callback function will be executed for each element
542  *		of the address list
543  *	@priv: Pointer to pass to the callback function.
544  *
545  *	Collects network information in a network address list and calls the
546  *	callback function for every entry in the list. If "change-notification-
547  *	control" is set, further changes in the address list will be reported
548  *	via the IPA command.
549  */
qeth_l2_pnso(struct qeth_card * card,u8 oc,int cnc,void (* cb)(void * priv,struct chsc_pnso_naid_l2 * entry),void * priv)550 static int qeth_l2_pnso(struct qeth_card *card, u8 oc, int cnc,
551 			void (*cb)(void *priv, struct chsc_pnso_naid_l2 *entry),
552 			void *priv)
553 {
554 	struct ccw_device *ddev = CARD_DDEV(card);
555 	struct chsc_pnso_area *rr;
556 	u32 prev_instance = 0;
557 	int isfirstblock = 1;
558 	int i, size, elems;
559 	int rc;
560 
561 	rr = (struct chsc_pnso_area *)get_zeroed_page(GFP_KERNEL);
562 	if (rr == NULL)
563 		return -ENOMEM;
564 	do {
565 		QETH_CARD_TEXT(card, 2, "PNSO");
566 		/* on the first iteration, naihdr.resume_token will be zero */
567 		rc = ccw_device_pnso(ddev, rr, oc, rr->naihdr.resume_token,
568 				     cnc);
569 		if (rc)
570 			continue;
571 		if (cb == NULL)
572 			continue;
573 
574 		size = rr->naihdr.naids;
575 		if (size != sizeof(struct chsc_pnso_naid_l2)) {
576 			WARN_ON_ONCE(1);
577 			continue;
578 		}
579 
580 		elems = (rr->response.length - sizeof(struct chsc_header) -
581 			 sizeof(struct chsc_pnso_naihdr)) / size;
582 
583 		if (!isfirstblock && (rr->naihdr.instance != prev_instance)) {
584 			/* Inform the caller that they need to scrap */
585 			/* the data that was already reported via cb */
586 			rc = -EAGAIN;
587 			break;
588 		}
589 		isfirstblock = 0;
590 		prev_instance = rr->naihdr.instance;
591 		for (i = 0; i < elems; i++)
592 			(*cb)(priv, &rr->entries[i]);
593 	} while ((rc == -EBUSY) || (!rc && /* list stored */
594 		   /* resume token is non-zero => list incomplete */
595 		   (rr->naihdr.resume_token.t1 || rr->naihdr.resume_token.t2)));
596 
597 	if (rc)
598 		QETH_CARD_TEXT_(card, 2, "PNrp%04x", rr->response.code);
599 
600 	free_page((unsigned long)rr);
601 	return rc;
602 }
603 
qeth_is_my_net_if_token(struct qeth_card * card,struct net_if_token * token)604 static bool qeth_is_my_net_if_token(struct qeth_card *card,
605 				    struct net_if_token *token)
606 {
607 	return ((card->info.ddev_devno == token->devnum) &&
608 		(card->info.cssid == token->cssid) &&
609 		(card->info.iid == token->iid) &&
610 		(card->info.ssid == token->ssid) &&
611 		(card->info.chpid == token->chpid) &&
612 		(card->info.chid == token->chid));
613 }
614 
615 /**
616  *	qeth_l2_dev2br_fdb_notify() - update fdb of master bridge
617  *	@card:	qeth_card structure pointer
618  *	@code:	event bitmask: high order bit 0x80 set to
619  *				1 - removal of an object
620  *				0 - addition of an object
621  *			       Object type(s):
622  *				0x01 - VLAN, 0x02 - MAC, 0x03 - VLAN and MAC
623  *	@token: "network token" structure identifying 'physical' location
624  *		of the target
625  *	@addr_lnid: structure with MAC address and VLAN ID of the target
626  */
qeth_l2_dev2br_fdb_notify(struct qeth_card * card,u8 code,struct net_if_token * token,struct mac_addr_lnid * addr_lnid)627 static void qeth_l2_dev2br_fdb_notify(struct qeth_card *card, u8 code,
628 				      struct net_if_token *token,
629 				      struct mac_addr_lnid *addr_lnid)
630 {
631 	struct switchdev_notifier_fdb_info info = {};
632 	u8 ntfy_mac[ETH_ALEN];
633 
634 	ether_addr_copy(ntfy_mac, addr_lnid->mac);
635 	/* Ignore VLAN only changes */
636 	if (!(code & IPA_ADDR_CHANGE_CODE_MACADDR))
637 		return;
638 	/* Ignore mcast entries */
639 	if (is_multicast_ether_addr(ntfy_mac))
640 		return;
641 	/* Ignore my own addresses */
642 	if (qeth_is_my_net_if_token(card, token))
643 		return;
644 
645 	info.addr = ntfy_mac;
646 	/* don't report VLAN IDs */
647 	info.vid = 0;
648 	info.added_by_user = false;
649 	info.offloaded = true;
650 
651 	if (code & IPA_ADDR_CHANGE_CODE_REMOVAL) {
652 		call_switchdev_notifiers(SWITCHDEV_FDB_DEL_TO_BRIDGE,
653 					 card->dev, &info.info, NULL);
654 		QETH_CARD_TEXT(card, 4, "andelmac");
655 		QETH_CARD_TEXT_(card, 4,
656 				"mc%012llx", ether_addr_to_u64(ntfy_mac));
657 	} else {
658 		call_switchdev_notifiers(SWITCHDEV_FDB_ADD_TO_BRIDGE,
659 					 card->dev, &info.info, NULL);
660 		QETH_CARD_TEXT(card, 4, "anaddmac");
661 		QETH_CARD_TEXT_(card, 4,
662 				"mc%012llx", ether_addr_to_u64(ntfy_mac));
663 	}
664 }
665 
qeth_l2_dev2br_an_set_cb(void * priv,struct chsc_pnso_naid_l2 * entry)666 static void qeth_l2_dev2br_an_set_cb(void *priv,
667 				     struct chsc_pnso_naid_l2 *entry)
668 {
669 	u8 code = IPA_ADDR_CHANGE_CODE_MACADDR;
670 	struct qeth_card *card = priv;
671 
672 	if (entry->addr_lnid.lnid < VLAN_N_VID)
673 		code |= IPA_ADDR_CHANGE_CODE_VLANID;
674 	qeth_l2_dev2br_fdb_notify(card, code,
675 				  (struct net_if_token *)&entry->nit,
676 				  (struct mac_addr_lnid *)&entry->addr_lnid);
677 }
678 
679 /**
680  *	qeth_l2_dev2br_an_set() -
681  *	Enable or disable 'dev to bridge network address notification'
682  *	@card: qeth_card structure pointer
683  *	@enable: Enable or disable 'dev to bridge network address notification'
684  *
685  *	Returns negative errno-compatible error indication or 0 on success.
686  *
687  *	On enable, emits a series of address notifications for all
688  *	currently registered hosts.
689  */
qeth_l2_dev2br_an_set(struct qeth_card * card,bool enable)690 static int qeth_l2_dev2br_an_set(struct qeth_card *card, bool enable)
691 {
692 	int rc;
693 
694 	if (enable) {
695 		QETH_CARD_TEXT(card, 2, "anseton");
696 		rc = qeth_l2_pnso(card, PNSO_OC_NET_ADDR_INFO, 1,
697 				  qeth_l2_dev2br_an_set_cb, card);
698 		if (rc == -EAGAIN)
699 			/* address notification enabled, but inconsistent
700 			 * addresses reported -> disable address notification
701 			 */
702 			qeth_l2_pnso(card, PNSO_OC_NET_ADDR_INFO, 0,
703 				     NULL, NULL);
704 	} else {
705 		QETH_CARD_TEXT(card, 2, "ansetoff");
706 		rc = qeth_l2_pnso(card, PNSO_OC_NET_ADDR_INFO, 0, NULL, NULL);
707 	}
708 
709 	return rc;
710 }
711 
712 struct qeth_l2_br2dev_event_work {
713 	struct work_struct work;
714 	struct net_device *br_dev;
715 	struct net_device *lsync_dev;
716 	struct net_device *dst_dev;
717 	unsigned long event;
718 	unsigned char addr[ETH_ALEN];
719 };
720 
721 static const struct net_device_ops qeth_l2_iqd_netdev_ops;
722 static const struct net_device_ops qeth_l2_osa_netdev_ops;
723 
qeth_l2_must_learn(struct net_device * netdev,struct net_device * dstdev)724 static bool qeth_l2_must_learn(struct net_device *netdev,
725 			       struct net_device *dstdev)
726 {
727 	struct qeth_priv *priv;
728 
729 	priv = netdev_priv(netdev);
730 	return (netdev != dstdev &&
731 		(priv->brport_features & BR_LEARNING_SYNC) &&
732 		!(br_port_flag_is_set(netdev, BR_ISOLATED) &&
733 		  br_port_flag_is_set(dstdev, BR_ISOLATED)) &&
734 		(netdev->netdev_ops == &qeth_l2_iqd_netdev_ops ||
735 		 netdev->netdev_ops == &qeth_l2_osa_netdev_ops));
736 }
737 
738 /**
739  *	qeth_l2_br2dev_worker() - update local MACs
740  *	@work: bridge to device FDB update
741  *
742  *	Update local MACs of a learning_sync bridgeport so it can receive
743  *	messages for a destination port.
744  *	In case of an isolated learning_sync port, also update its isolated
745  *	siblings.
746  */
qeth_l2_br2dev_worker(struct work_struct * work)747 static void qeth_l2_br2dev_worker(struct work_struct *work)
748 {
749 	struct qeth_l2_br2dev_event_work *br2dev_event_work =
750 		container_of(work, struct qeth_l2_br2dev_event_work, work);
751 	struct net_device *lsyncdev = br2dev_event_work->lsync_dev;
752 	struct net_device *dstdev = br2dev_event_work->dst_dev;
753 	struct net_device *brdev = br2dev_event_work->br_dev;
754 	unsigned long event = br2dev_event_work->event;
755 	unsigned char *addr = br2dev_event_work->addr;
756 	struct qeth_card *card = lsyncdev->ml_priv;
757 	struct net_device *lowerdev;
758 	struct list_head *iter;
759 	int err = 0;
760 
761 	QETH_CARD_TEXT_(card, 4, "b2dw%04lx", event);
762 	QETH_CARD_TEXT_(card, 4, "ma%012llx", ether_addr_to_u64(addr));
763 
764 	rcu_read_lock();
765 	/* Verify preconditions are still valid: */
766 	if (!netif_is_bridge_port(lsyncdev) ||
767 	    brdev != netdev_master_upper_dev_get_rcu(lsyncdev))
768 		goto unlock;
769 	if (!qeth_l2_must_learn(lsyncdev, dstdev))
770 		goto unlock;
771 
772 	if (br_port_flag_is_set(lsyncdev, BR_ISOLATED)) {
773 		/* Update lsyncdev and its isolated sibling(s): */
774 		iter = &brdev->adj_list.lower;
775 		lowerdev = netdev_next_lower_dev_rcu(brdev, &iter);
776 		while (lowerdev) {
777 			if (br_port_flag_is_set(lowerdev, BR_ISOLATED)) {
778 				switch (event) {
779 				case SWITCHDEV_FDB_ADD_TO_DEVICE:
780 					err = dev_uc_add(lowerdev, addr);
781 					break;
782 				case SWITCHDEV_FDB_DEL_TO_DEVICE:
783 					err = dev_uc_del(lowerdev, addr);
784 					break;
785 				default:
786 					break;
787 				}
788 				if (err) {
789 					QETH_CARD_TEXT(card, 2, "b2derris");
790 					QETH_CARD_TEXT_(card, 2,
791 							"err%02lx%03d", event,
792 							lowerdev->ifindex);
793 				}
794 			}
795 			lowerdev = netdev_next_lower_dev_rcu(brdev, &iter);
796 		}
797 	} else {
798 		switch (event) {
799 		case SWITCHDEV_FDB_ADD_TO_DEVICE:
800 			err = dev_uc_add(lsyncdev, addr);
801 			break;
802 		case SWITCHDEV_FDB_DEL_TO_DEVICE:
803 			err = dev_uc_del(lsyncdev, addr);
804 			break;
805 		default:
806 			break;
807 		}
808 		if (err)
809 			QETH_CARD_TEXT_(card, 2, "b2derr%02lx", event);
810 	}
811 
812 unlock:
813 	rcu_read_unlock();
814 	dev_put(brdev);
815 	dev_put(lsyncdev);
816 	dev_put(dstdev);
817 	kfree(br2dev_event_work);
818 }
819 
qeth_l2_br2dev_queue_work(struct net_device * brdev,struct net_device * lsyncdev,struct net_device * dstdev,unsigned long event,const unsigned char * addr)820 static int qeth_l2_br2dev_queue_work(struct net_device *brdev,
821 				     struct net_device *lsyncdev,
822 				     struct net_device *dstdev,
823 				     unsigned long event,
824 				     const unsigned char *addr)
825 {
826 	struct qeth_l2_br2dev_event_work *worker_data;
827 	struct qeth_card *card;
828 
829 	worker_data = kzalloc(sizeof(*worker_data), GFP_ATOMIC);
830 	if (!worker_data)
831 		return -ENOMEM;
832 	INIT_WORK(&worker_data->work, qeth_l2_br2dev_worker);
833 	worker_data->br_dev = brdev;
834 	worker_data->lsync_dev = lsyncdev;
835 	worker_data->dst_dev = dstdev;
836 	worker_data->event = event;
837 	ether_addr_copy(worker_data->addr, addr);
838 
839 	card = lsyncdev->ml_priv;
840 	/* Take a reference on the sw port devices and the bridge */
841 	dev_hold(brdev);
842 	dev_hold(lsyncdev);
843 	dev_hold(dstdev);
844 	queue_work(card->event_wq, &worker_data->work);
845 	return 0;
846 }
847 
848 /* Called under rtnl_lock */
qeth_l2_switchdev_event(struct notifier_block * unused,unsigned long event,void * ptr)849 static int qeth_l2_switchdev_event(struct notifier_block *unused,
850 				   unsigned long event, void *ptr)
851 {
852 	struct net_device *dstdev, *brdev, *lowerdev;
853 	struct switchdev_notifier_fdb_info *fdb_info;
854 	struct switchdev_notifier_info *info = ptr;
855 	struct list_head *iter;
856 	struct qeth_card *card;
857 	int rc;
858 
859 	if (!(event == SWITCHDEV_FDB_ADD_TO_DEVICE ||
860 	      event == SWITCHDEV_FDB_DEL_TO_DEVICE))
861 		return NOTIFY_DONE;
862 
863 	dstdev = switchdev_notifier_info_to_dev(info);
864 	brdev = netdev_master_upper_dev_get_rcu(dstdev);
865 	if (!brdev || !netif_is_bridge_master(brdev))
866 		return NOTIFY_DONE;
867 	fdb_info = container_of(info,
868 				struct switchdev_notifier_fdb_info,
869 				info);
870 	iter = &brdev->adj_list.lower;
871 	lowerdev = netdev_next_lower_dev_rcu(brdev, &iter);
872 	while (lowerdev) {
873 		if (qeth_l2_must_learn(lowerdev, dstdev)) {
874 			card = lowerdev->ml_priv;
875 			QETH_CARD_TEXT_(card, 4, "b2dqw%03lx", event);
876 			rc = qeth_l2_br2dev_queue_work(brdev, lowerdev,
877 						       dstdev, event,
878 						       fdb_info->addr);
879 			if (rc) {
880 				QETH_CARD_TEXT(card, 2, "b2dqwerr");
881 				return NOTIFY_BAD;
882 			}
883 		}
884 		lowerdev = netdev_next_lower_dev_rcu(brdev, &iter);
885 	}
886 	return NOTIFY_DONE;
887 }
888 
889 static struct notifier_block qeth_l2_sw_notifier = {
890 		.notifier_call = qeth_l2_switchdev_event,
891 };
892 
893 static refcount_t qeth_l2_switchdev_notify_refcnt;
894 
895 /* Called under rtnl_lock */
qeth_l2_br2dev_get(void)896 static void qeth_l2_br2dev_get(void)
897 {
898 	int rc;
899 
900 	if (!refcount_inc_not_zero(&qeth_l2_switchdev_notify_refcnt)) {
901 		rc = register_switchdev_notifier(&qeth_l2_sw_notifier);
902 		if (rc) {
903 			QETH_DBF_MESSAGE(2,
904 					 "failed to register qeth_l2_sw_notifier: %d\n",
905 					 rc);
906 		} else {
907 			refcount_set(&qeth_l2_switchdev_notify_refcnt, 1);
908 			QETH_DBF_MESSAGE(2, "qeth_l2_sw_notifier registered\n");
909 		}
910 	}
911 	QETH_DBF_TEXT_(SETUP, 2, "b2d+%04d",
912 		       qeth_l2_switchdev_notify_refcnt.refs.counter);
913 }
914 
915 /* Called under rtnl_lock */
qeth_l2_br2dev_put(void)916 static void qeth_l2_br2dev_put(void)
917 {
918 	int rc;
919 
920 	if (refcount_dec_and_test(&qeth_l2_switchdev_notify_refcnt)) {
921 		rc = unregister_switchdev_notifier(&qeth_l2_sw_notifier);
922 		if (rc) {
923 			QETH_DBF_MESSAGE(2,
924 					 "failed to unregister qeth_l2_sw_notifier: %d\n",
925 					 rc);
926 		} else {
927 			QETH_DBF_MESSAGE(2,
928 					 "qeth_l2_sw_notifier unregistered\n");
929 		}
930 	}
931 	QETH_DBF_TEXT_(SETUP, 2, "b2d-%04d",
932 		       qeth_l2_switchdev_notify_refcnt.refs.counter);
933 }
934 
qeth_l2_bridge_getlink(struct sk_buff * skb,u32 pid,u32 seq,struct net_device * dev,u32 filter_mask,int nlflags)935 static int qeth_l2_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
936 				  struct net_device *dev, u32 filter_mask,
937 				  int nlflags)
938 {
939 	struct qeth_priv *priv = netdev_priv(dev);
940 	struct qeth_card *card = dev->ml_priv;
941 	u16 mode = BRIDGE_MODE_UNDEF;
942 
943 	/* Do not even show qeth devs that cannot do bridge_setlink */
944 	if (!priv->brport_hw_features || !netif_device_present(dev) ||
945 	    qeth_bridgeport_is_in_use(card))
946 		return -EOPNOTSUPP;
947 
948 	return ndo_dflt_bridge_getlink(skb, pid, seq, dev,
949 				       mode, priv->brport_features,
950 				       priv->brport_hw_features,
951 				       nlflags, filter_mask, NULL);
952 }
953 
954 static const struct nla_policy qeth_brport_policy[IFLA_BRPORT_MAX + 1] = {
955 	[IFLA_BRPORT_LEARNING_SYNC]	= { .type = NLA_U8 },
956 };
957 
958 /**
959  *	qeth_l2_bridge_setlink() - set bridgeport attributes
960  *	@dev: netdevice
961  *	@nlh: netlink message header
962  *	@flags: bridge flags (here: BRIDGE_FLAGS_SELF)
963  *	@extack: extended ACK report struct
964  *
965  *	Called under rtnl_lock
966  */
qeth_l2_bridge_setlink(struct net_device * dev,struct nlmsghdr * nlh,u16 flags,struct netlink_ext_ack * extack)967 static int qeth_l2_bridge_setlink(struct net_device *dev, struct nlmsghdr *nlh,
968 				  u16 flags, struct netlink_ext_ack *extack)
969 {
970 	struct qeth_priv *priv = netdev_priv(dev);
971 	struct nlattr *bp_tb[IFLA_BRPORT_MAX + 1];
972 	struct qeth_card *card = dev->ml_priv;
973 	struct nlattr *attr, *nested_attr;
974 	bool enable, has_protinfo = false;
975 	int rem1, rem2;
976 	int rc;
977 
978 	if (!netif_device_present(dev))
979 		return -ENODEV;
980 
981 	nlmsg_for_each_attr(attr, nlh, sizeof(struct ifinfomsg), rem1) {
982 		if (nla_type(attr) == IFLA_PROTINFO) {
983 			rc = nla_parse_nested(bp_tb, IFLA_BRPORT_MAX, attr,
984 					      qeth_brport_policy, extack);
985 			if (rc)
986 				return rc;
987 			has_protinfo = true;
988 		} else if (nla_type(attr) == IFLA_AF_SPEC) {
989 			nla_for_each_nested(nested_attr, attr, rem2) {
990 				if (nla_type(nested_attr) == IFLA_BRIDGE_FLAGS)
991 					continue;
992 				NL_SET_ERR_MSG_ATTR(extack, nested_attr,
993 						    "Unsupported attribute");
994 				return -EINVAL;
995 			}
996 		} else {
997 			NL_SET_ERR_MSG_ATTR(extack, attr, "Unsupported attribute");
998 			return -EINVAL;
999 		}
1000 	}
1001 	if (!has_protinfo)
1002 		return 0;
1003 	if (!bp_tb[IFLA_BRPORT_LEARNING_SYNC])
1004 		return -EINVAL;
1005 	if (!(priv->brport_hw_features & BR_LEARNING_SYNC)) {
1006 		NL_SET_ERR_MSG_ATTR(extack, bp_tb[IFLA_BRPORT_LEARNING_SYNC],
1007 				    "Operation not supported by HW");
1008 		return -EOPNOTSUPP;
1009 	}
1010 	if (!IS_ENABLED(CONFIG_NET_SWITCHDEV)) {
1011 		NL_SET_ERR_MSG_ATTR(extack, bp_tb[IFLA_BRPORT_LEARNING_SYNC],
1012 				    "Requires NET_SWITCHDEV");
1013 		return -EOPNOTSUPP;
1014 	}
1015 	enable = !!nla_get_u8(bp_tb[IFLA_BRPORT_LEARNING_SYNC]);
1016 
1017 	if (enable == !!(priv->brport_features & BR_LEARNING_SYNC))
1018 		return 0;
1019 
1020 	mutex_lock(&card->sbp_lock);
1021 	/* do not change anything if BridgePort is enabled */
1022 	if (qeth_bridgeport_is_in_use(card)) {
1023 		NL_SET_ERR_MSG(extack, "n/a (BridgePort)");
1024 		rc = -EBUSY;
1025 	} else if (enable) {
1026 		qeth_l2_set_pnso_mode(card, QETH_PNSO_ADDR_INFO);
1027 		rc = qeth_l2_dev2br_an_set(card, true);
1028 		if (rc) {
1029 			qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
1030 		} else {
1031 			priv->brport_features |= BR_LEARNING_SYNC;
1032 			qeth_l2_br2dev_get();
1033 		}
1034 	} else {
1035 		rc = qeth_l2_dev2br_an_set(card, false);
1036 		if (!rc) {
1037 			qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
1038 			priv->brport_features ^= BR_LEARNING_SYNC;
1039 			qeth_l2_dev2br_fdb_flush(card);
1040 			qeth_l2_br2dev_put();
1041 		}
1042 	}
1043 	mutex_unlock(&card->sbp_lock);
1044 
1045 	return rc;
1046 }
1047 
1048 static const struct net_device_ops qeth_l2_iqd_netdev_ops = {
1049 	.ndo_open		= qeth_open,
1050 	.ndo_stop		= qeth_stop,
1051 	.ndo_get_stats64	= qeth_get_stats64,
1052 	.ndo_start_xmit		= qeth_l2_hard_start_xmit,
1053 	.ndo_features_check	= qeth_features_check,
1054 	.ndo_select_queue	= qeth_l2_iqd_select_queue,
1055 	.ndo_validate_addr	= qeth_l2_validate_addr,
1056 	.ndo_set_rx_mode	= qeth_l2_set_rx_mode,
1057 	.ndo_eth_ioctl		= qeth_do_ioctl,
1058 	.ndo_siocdevprivate	= qeth_siocdevprivate,
1059 	.ndo_set_mac_address	= qeth_l2_set_mac_address,
1060 	.ndo_vlan_rx_add_vid	= qeth_l2_vlan_rx_add_vid,
1061 	.ndo_vlan_rx_kill_vid	= qeth_l2_vlan_rx_kill_vid,
1062 	.ndo_tx_timeout		= qeth_tx_timeout,
1063 	.ndo_fix_features	= qeth_fix_features,
1064 	.ndo_set_features	= qeth_set_features,
1065 	.ndo_bridge_getlink	= qeth_l2_bridge_getlink,
1066 	.ndo_bridge_setlink	= qeth_l2_bridge_setlink,
1067 };
1068 
1069 static const struct net_device_ops qeth_l2_osa_netdev_ops = {
1070 	.ndo_open		= qeth_open,
1071 	.ndo_stop		= qeth_stop,
1072 	.ndo_get_stats64	= qeth_get_stats64,
1073 	.ndo_start_xmit		= qeth_l2_hard_start_xmit,
1074 	.ndo_features_check	= qeth_features_check,
1075 	.ndo_select_queue	= qeth_osa_select_queue,
1076 	.ndo_validate_addr	= qeth_l2_validate_addr,
1077 	.ndo_set_rx_mode	= qeth_l2_set_rx_mode,
1078 	.ndo_eth_ioctl		= qeth_do_ioctl,
1079 	.ndo_siocdevprivate	= qeth_siocdevprivate,
1080 	.ndo_set_mac_address    = qeth_l2_set_mac_address,
1081 	.ndo_vlan_rx_add_vid	= qeth_l2_vlan_rx_add_vid,
1082 	.ndo_vlan_rx_kill_vid   = qeth_l2_vlan_rx_kill_vid,
1083 	.ndo_tx_timeout		= qeth_tx_timeout,
1084 	.ndo_fix_features	= qeth_fix_features,
1085 	.ndo_set_features	= qeth_set_features,
1086 };
1087 
qeth_l2_setup_netdev(struct qeth_card * card)1088 static int qeth_l2_setup_netdev(struct qeth_card *card)
1089 {
1090 	card->dev->netdev_ops = IS_IQD(card) ? &qeth_l2_iqd_netdev_ops :
1091 					       &qeth_l2_osa_netdev_ops;
1092 	card->dev->needed_headroom = sizeof(struct qeth_hdr);
1093 	card->dev->priv_flags |= IFF_UNICAST_FLT;
1094 
1095 	if (IS_OSM(card)) {
1096 		card->dev->features |= NETIF_F_VLAN_CHALLENGED;
1097 	} else {
1098 		if (!IS_VM_NIC(card))
1099 			card->dev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
1100 		card->dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
1101 	}
1102 
1103 	if (IS_OSD(card) && !IS_VM_NIC(card)) {
1104 		card->dev->features |= NETIF_F_SG;
1105 		/* OSA 3S and earlier has no RX/TX support */
1106 		if (qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM)) {
1107 			card->dev->hw_features |= NETIF_F_IP_CSUM;
1108 			card->dev->vlan_features |= NETIF_F_IP_CSUM;
1109 		}
1110 	}
1111 	if (qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) {
1112 		card->dev->hw_features |= NETIF_F_IPV6_CSUM;
1113 		card->dev->vlan_features |= NETIF_F_IPV6_CSUM;
1114 	}
1115 	if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM) ||
1116 	    qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6)) {
1117 		card->dev->hw_features |= NETIF_F_RXCSUM;
1118 		card->dev->vlan_features |= NETIF_F_RXCSUM;
1119 	}
1120 	if (qeth_is_supported(card, IPA_OUTBOUND_TSO)) {
1121 		card->dev->hw_features |= NETIF_F_TSO;
1122 		card->dev->vlan_features |= NETIF_F_TSO;
1123 	}
1124 	if (qeth_is_supported6(card, IPA_OUTBOUND_TSO)) {
1125 		card->dev->hw_features |= NETIF_F_TSO6;
1126 		card->dev->vlan_features |= NETIF_F_TSO6;
1127 	}
1128 
1129 	if (card->dev->hw_features & (NETIF_F_TSO | NETIF_F_TSO6)) {
1130 		card->dev->needed_headroom = sizeof(struct qeth_hdr_tso);
1131 		netif_keep_dst(card->dev);
1132 		netif_set_tso_max_size(card->dev,
1133 				       PAGE_SIZE * (QDIO_MAX_ELEMENTS_PER_BUFFER - 1));
1134 	}
1135 
1136 	netif_napi_add(card->dev, &card->napi, qeth_poll);
1137 	return register_netdev(card->dev);
1138 }
1139 
qeth_l2_trace_features(struct qeth_card * card)1140 static void qeth_l2_trace_features(struct qeth_card *card)
1141 {
1142 	/* Set BridgePort features */
1143 	QETH_CARD_TEXT(card, 2, "featuSBP");
1144 	QETH_CARD_HEX(card, 2, &card->options.sbp.supported_funcs,
1145 		      sizeof(card->options.sbp.supported_funcs));
1146 	/* VNIC Characteristics features */
1147 	QETH_CARD_TEXT(card, 2, "feaVNICC");
1148 	QETH_CARD_HEX(card, 2, &card->options.vnicc.sup_chars,
1149 		      sizeof(card->options.vnicc.sup_chars));
1150 }
1151 
qeth_l2_setup_bridgeport_attrs(struct qeth_card * card)1152 static void qeth_l2_setup_bridgeport_attrs(struct qeth_card *card)
1153 {
1154 	if (!card->options.sbp.reflect_promisc &&
1155 	    card->options.sbp.role != QETH_SBP_ROLE_NONE) {
1156 		/* Conditional to avoid spurious error messages */
1157 		qeth_bridgeport_setrole(card, card->options.sbp.role);
1158 		/* Let the callback function refresh the stored role value. */
1159 		qeth_bridgeport_query_ports(card, &card->options.sbp.role,
1160 					    NULL);
1161 	}
1162 	if (card->options.sbp.hostnotification) {
1163 		if (qeth_bridgeport_an_set(card, 1))
1164 			card->options.sbp.hostnotification = 0;
1165 	}
1166 }
1167 
1168 /**
1169  *	qeth_l2_detect_dev2br_support() -
1170  *	Detect whether this card supports 'dev to bridge fdb network address
1171  *	change notification' and thus can support the learning_sync bridgeport
1172  *	attribute
1173  *	@card: qeth_card structure pointer
1174  */
qeth_l2_detect_dev2br_support(struct qeth_card * card)1175 static void qeth_l2_detect_dev2br_support(struct qeth_card *card)
1176 {
1177 	struct qeth_priv *priv = netdev_priv(card->dev);
1178 	bool dev2br_supported;
1179 
1180 	QETH_CARD_TEXT(card, 2, "d2brsup");
1181 	if (!IS_IQD(card))
1182 		return;
1183 
1184 	/* dev2br requires valid cssid,iid,chid */
1185 	dev2br_supported = card->info.ids_valid &&
1186 			   css_general_characteristics.enarf;
1187 	QETH_CARD_TEXT_(card, 2, "D2Bsup%02x", dev2br_supported);
1188 
1189 	if (dev2br_supported)
1190 		priv->brport_hw_features |= BR_LEARNING_SYNC;
1191 	else
1192 		priv->brport_hw_features &= ~BR_LEARNING_SYNC;
1193 }
1194 
qeth_l2_enable_brport_features(struct qeth_card * card)1195 static void qeth_l2_enable_brport_features(struct qeth_card *card)
1196 {
1197 	struct qeth_priv *priv = netdev_priv(card->dev);
1198 	int rc;
1199 
1200 	if (priv->brport_features & BR_LEARNING_SYNC) {
1201 		if (priv->brport_hw_features & BR_LEARNING_SYNC) {
1202 			qeth_l2_set_pnso_mode(card, QETH_PNSO_ADDR_INFO);
1203 			rc = qeth_l2_dev2br_an_set(card, true);
1204 			if (rc == -EAGAIN) {
1205 				/* Recoverable error, retry once */
1206 				qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
1207 				qeth_l2_dev2br_fdb_flush(card);
1208 				qeth_l2_set_pnso_mode(card, QETH_PNSO_ADDR_INFO);
1209 				rc = qeth_l2_dev2br_an_set(card, true);
1210 			}
1211 			if (rc) {
1212 				netdev_err(card->dev,
1213 					   "failed to enable bridge learning_sync: %d\n",
1214 					   rc);
1215 				qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
1216 				qeth_l2_dev2br_fdb_flush(card);
1217 				priv->brport_features ^= BR_LEARNING_SYNC;
1218 			}
1219 		} else {
1220 			dev_warn(&card->gdev->dev,
1221 				"bridge learning_sync not supported\n");
1222 			priv->brport_features ^= BR_LEARNING_SYNC;
1223 		}
1224 	}
1225 }
1226 
1227 /* SETBRIDGEPORT support, async notifications */
1228 
1229 enum qeth_an_event_type {anev_reg_unreg, anev_abort, anev_reset};
1230 
1231 /**
1232  * qeth_bridge_emit_host_event() - bridgeport address change notification
1233  * @card:  qeth_card structure pointer, for udev events.
1234  * @evtype:  "normal" register/unregister, or abort, or reset. For abort
1235  *	      and reset token and addr_lnid are unused and may be NULL.
1236  * @code:  event bitmask: high order bit 0x80 value 1 means removal of an
1237  *			  object, 0 - addition of an object.
1238  *			  0x01 - VLAN, 0x02 - MAC, 0x03 - VLAN and MAC.
1239  * @token: "network token" structure identifying physical address of the port.
1240  * @addr_lnid: pointer to structure with MAC address and VLAN ID.
1241  *
1242  * This function is called when registrations and deregistrations are
1243  * reported by the hardware, and also when notifications are enabled -
1244  * for all currently registered addresses.
1245  */
qeth_bridge_emit_host_event(struct qeth_card * card,enum qeth_an_event_type evtype,u8 code,struct net_if_token * token,struct mac_addr_lnid * addr_lnid)1246 static void qeth_bridge_emit_host_event(struct qeth_card *card,
1247 					enum qeth_an_event_type evtype,
1248 					u8 code,
1249 					struct net_if_token *token,
1250 					struct mac_addr_lnid *addr_lnid)
1251 {
1252 	char str[7][32];
1253 	char *env[8];
1254 	int i = 0;
1255 
1256 	switch (evtype) {
1257 	case anev_reg_unreg:
1258 		scnprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=%s",
1259 			  (code & IPA_ADDR_CHANGE_CODE_REMOVAL)
1260 			  ? "deregister" : "register");
1261 		env[i] = str[i]; i++;
1262 		if (code & IPA_ADDR_CHANGE_CODE_VLANID) {
1263 			scnprintf(str[i], sizeof(str[i]), "VLAN=%d",
1264 				  addr_lnid->lnid);
1265 			env[i] = str[i]; i++;
1266 		}
1267 		if (code & IPA_ADDR_CHANGE_CODE_MACADDR) {
1268 			scnprintf(str[i], sizeof(str[i]), "MAC=%pM",
1269 				  addr_lnid->mac);
1270 			env[i] = str[i]; i++;
1271 		}
1272 		scnprintf(str[i], sizeof(str[i]), "NTOK_BUSID=%x.%x.%04x",
1273 			  token->cssid, token->ssid, token->devnum);
1274 		env[i] = str[i]; i++;
1275 		scnprintf(str[i], sizeof(str[i]), "NTOK_IID=%02x", token->iid);
1276 		env[i] = str[i]; i++;
1277 		scnprintf(str[i], sizeof(str[i]), "NTOK_CHPID=%02x",
1278 			  token->chpid);
1279 		env[i] = str[i]; i++;
1280 		scnprintf(str[i], sizeof(str[i]), "NTOK_CHID=%04x",
1281 			  token->chid);
1282 		env[i] = str[i]; i++;
1283 		break;
1284 	case anev_abort:
1285 		scnprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=abort");
1286 		env[i] = str[i]; i++;
1287 		break;
1288 	case anev_reset:
1289 		scnprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=reset");
1290 		env[i] = str[i]; i++;
1291 		break;
1292 	}
1293 	env[i] = NULL;
1294 	kobject_uevent_env(&card->gdev->dev.kobj, KOBJ_CHANGE, env);
1295 }
1296 
1297 struct qeth_bridge_state_data {
1298 	struct work_struct worker;
1299 	struct qeth_card *card;
1300 	u8 role;
1301 	u8 state;
1302 };
1303 
qeth_bridge_state_change_worker(struct work_struct * work)1304 static void qeth_bridge_state_change_worker(struct work_struct *work)
1305 {
1306 	struct qeth_bridge_state_data *data =
1307 		container_of(work, struct qeth_bridge_state_data, worker);
1308 	char env_locrem[32];
1309 	char env_role[32];
1310 	char env_state[32];
1311 	char *env[] = {
1312 		env_locrem,
1313 		env_role,
1314 		env_state,
1315 		NULL
1316 	};
1317 
1318 	scnprintf(env_locrem, sizeof(env_locrem), "BRIDGEPORT=statechange");
1319 	scnprintf(env_role, sizeof(env_role), "ROLE=%s",
1320 		  (data->role == QETH_SBP_ROLE_NONE) ? "none" :
1321 		  (data->role == QETH_SBP_ROLE_PRIMARY) ? "primary" :
1322 		  (data->role == QETH_SBP_ROLE_SECONDARY) ? "secondary" :
1323 		  "<INVALID>");
1324 	scnprintf(env_state, sizeof(env_state), "STATE=%s",
1325 		  (data->state == QETH_SBP_STATE_INACTIVE) ? "inactive" :
1326 		  (data->state == QETH_SBP_STATE_STANDBY) ? "standby" :
1327 		  (data->state == QETH_SBP_STATE_ACTIVE) ? "active" :
1328 		  "<INVALID>");
1329 	kobject_uevent_env(&data->card->gdev->dev.kobj,
1330 				KOBJ_CHANGE, env);
1331 	kfree(data);
1332 }
1333 
qeth_bridge_state_change(struct qeth_card * card,struct qeth_ipa_cmd * cmd)1334 static void qeth_bridge_state_change(struct qeth_card *card,
1335 					struct qeth_ipa_cmd *cmd)
1336 {
1337 	struct qeth_sbp_port_data *qports = &cmd->data.sbp.data.port_data;
1338 	struct qeth_bridge_state_data *data;
1339 
1340 	QETH_CARD_TEXT(card, 2, "brstchng");
1341 	if (qports->num_entries == 0) {
1342 		QETH_CARD_TEXT(card, 2, "BPempty");
1343 		return;
1344 	}
1345 	if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1346 		QETH_CARD_TEXT_(card, 2, "BPsz%04x", qports->entry_length);
1347 		return;
1348 	}
1349 
1350 	data = kzalloc(sizeof(*data), GFP_ATOMIC);
1351 	if (!data) {
1352 		QETH_CARD_TEXT(card, 2, "BPSalloc");
1353 		return;
1354 	}
1355 	INIT_WORK(&data->worker, qeth_bridge_state_change_worker);
1356 	data->card = card;
1357 	/* Information for the local port: */
1358 	data->role = qports->entry[0].role;
1359 	data->state = qports->entry[0].state;
1360 
1361 	queue_work(card->event_wq, &data->worker);
1362 }
1363 
1364 struct qeth_addr_change_data {
1365 	struct delayed_work dwork;
1366 	struct qeth_card *card;
1367 	struct qeth_ipacmd_addr_change ac_event;
1368 };
1369 
qeth_l2_dev2br_worker(struct work_struct * work)1370 static void qeth_l2_dev2br_worker(struct work_struct *work)
1371 {
1372 	struct delayed_work *dwork = to_delayed_work(work);
1373 	struct qeth_addr_change_data *data;
1374 	struct qeth_card *card;
1375 	struct qeth_priv *priv;
1376 	unsigned int i;
1377 	int rc;
1378 
1379 	data = container_of(dwork, struct qeth_addr_change_data, dwork);
1380 	card = data->card;
1381 	priv = netdev_priv(card->dev);
1382 
1383 	QETH_CARD_TEXT(card, 4, "dev2brew");
1384 
1385 	if (READ_ONCE(card->info.pnso_mode) == QETH_PNSO_NONE)
1386 		goto free;
1387 
1388 	if (data->ac_event.lost_event_mask) {
1389 		/* Potential re-config in progress, try again later: */
1390 		if (!rtnl_trylock()) {
1391 			queue_delayed_work(card->event_wq, dwork,
1392 					   msecs_to_jiffies(100));
1393 			return;
1394 		}
1395 
1396 		if (!netif_device_present(card->dev)) {
1397 			rtnl_unlock();
1398 			goto free;
1399 		}
1400 
1401 		QETH_DBF_MESSAGE(3,
1402 				 "Address change notification overflow on device %x\n",
1403 				 CARD_DEVID(card));
1404 		/* Card fdb and bridge fdb are out of sync, card has stopped
1405 		 * notifications (no need to drain_workqueue). Purge all
1406 		 * 'extern_learn' entries from the parent bridge and restart
1407 		 * the notifications.
1408 		 */
1409 		qeth_l2_dev2br_fdb_flush(card);
1410 		rc = qeth_l2_dev2br_an_set(card, true);
1411 		if (rc) {
1412 			/* TODO: if we want to retry after -EAGAIN, be
1413 			 * aware there could be stale entries in the
1414 			 * workqueue now, that need to be drained.
1415 			 * For now we give up:
1416 			 */
1417 			netdev_err(card->dev,
1418 				   "bridge learning_sync failed to recover: %d\n",
1419 				   rc);
1420 			WRITE_ONCE(card->info.pnso_mode,
1421 				   QETH_PNSO_NONE);
1422 			/* To remove fdb entries reported by an_set: */
1423 			qeth_l2_dev2br_fdb_flush(card);
1424 			priv->brport_features ^= BR_LEARNING_SYNC;
1425 		} else {
1426 			QETH_DBF_MESSAGE(3,
1427 					 "Address Notification resynced on device %x\n",
1428 					 CARD_DEVID(card));
1429 		}
1430 
1431 		rtnl_unlock();
1432 	} else {
1433 		for (i = 0; i < data->ac_event.num_entries; i++) {
1434 			struct qeth_ipacmd_addr_change_entry *entry =
1435 					&data->ac_event.entry[i];
1436 			qeth_l2_dev2br_fdb_notify(card,
1437 						  entry->change_code,
1438 						  &entry->token,
1439 						  &entry->addr_lnid);
1440 		}
1441 	}
1442 
1443 free:
1444 	kfree(data);
1445 }
1446 
qeth_addr_change_event_worker(struct work_struct * work)1447 static void qeth_addr_change_event_worker(struct work_struct *work)
1448 {
1449 	struct delayed_work *dwork = to_delayed_work(work);
1450 	struct qeth_addr_change_data *data;
1451 	struct qeth_card *card;
1452 	int i;
1453 
1454 	data = container_of(dwork, struct qeth_addr_change_data, dwork);
1455 	card = data->card;
1456 
1457 	QETH_CARD_TEXT(data->card, 4, "adrchgew");
1458 
1459 	if (READ_ONCE(card->info.pnso_mode) == QETH_PNSO_NONE)
1460 		goto free;
1461 
1462 	if (data->ac_event.lost_event_mask) {
1463 		/* Potential re-config in progress, try again later: */
1464 		if (!mutex_trylock(&card->sbp_lock)) {
1465 			queue_delayed_work(card->event_wq, dwork,
1466 					   msecs_to_jiffies(100));
1467 			return;
1468 		}
1469 
1470 		dev_info(&data->card->gdev->dev,
1471 			 "Address change notification stopped on %s (%s)\n",
1472 			 netdev_name(card->dev),
1473 			(data->ac_event.lost_event_mask == 0x01)
1474 			? "Overflow"
1475 			: (data->ac_event.lost_event_mask == 0x02)
1476 			? "Bridge port state change"
1477 			: "Unknown reason");
1478 
1479 		data->card->options.sbp.hostnotification = 0;
1480 		card->info.pnso_mode = QETH_PNSO_NONE;
1481 		mutex_unlock(&data->card->sbp_lock);
1482 		qeth_bridge_emit_host_event(data->card, anev_abort,
1483 					    0, NULL, NULL);
1484 	} else
1485 		for (i = 0; i < data->ac_event.num_entries; i++) {
1486 			struct qeth_ipacmd_addr_change_entry *entry =
1487 					&data->ac_event.entry[i];
1488 			qeth_bridge_emit_host_event(data->card,
1489 						    anev_reg_unreg,
1490 						    entry->change_code,
1491 						    &entry->token,
1492 						    &entry->addr_lnid);
1493 		}
1494 
1495 free:
1496 	kfree(data);
1497 }
1498 
qeth_addr_change_event(struct qeth_card * card,struct qeth_ipa_cmd * cmd)1499 static void qeth_addr_change_event(struct qeth_card *card,
1500 				   struct qeth_ipa_cmd *cmd)
1501 {
1502 	struct qeth_ipacmd_addr_change *hostevs =
1503 		 &cmd->data.addrchange;
1504 	struct qeth_addr_change_data *data;
1505 	int extrasize;
1506 
1507 	if (card->info.pnso_mode == QETH_PNSO_NONE)
1508 		return;
1509 
1510 	QETH_CARD_TEXT(card, 4, "adrchgev");
1511 	if (cmd->hdr.return_code != 0x0000) {
1512 		if (cmd->hdr.return_code == 0x0010) {
1513 			if (hostevs->lost_event_mask == 0x00)
1514 				hostevs->lost_event_mask = 0xff;
1515 		} else {
1516 			QETH_CARD_TEXT_(card, 2, "ACHN%04x",
1517 				cmd->hdr.return_code);
1518 			return;
1519 		}
1520 	}
1521 	extrasize = sizeof(struct qeth_ipacmd_addr_change_entry) *
1522 						hostevs->num_entries;
1523 	data = kzalloc(sizeof(struct qeth_addr_change_data) + extrasize,
1524 		       GFP_ATOMIC);
1525 	if (!data) {
1526 		QETH_CARD_TEXT(card, 2, "ACNalloc");
1527 		return;
1528 	}
1529 	if (card->info.pnso_mode == QETH_PNSO_BRIDGEPORT)
1530 		INIT_DELAYED_WORK(&data->dwork, qeth_addr_change_event_worker);
1531 	else
1532 		INIT_DELAYED_WORK(&data->dwork, qeth_l2_dev2br_worker);
1533 	data->card = card;
1534 	data->ac_event = *hostevs;
1535 	memcpy(data->ac_event.entry, hostevs->entry, extrasize);
1536 	queue_delayed_work(card->event_wq, &data->dwork, 0);
1537 }
1538 
1539 /* SETBRIDGEPORT support; sending commands */
1540 
1541 struct _qeth_sbp_cbctl {
1542 	union {
1543 		u32 supported;
1544 		struct {
1545 			enum qeth_sbp_roles *role;
1546 			enum qeth_sbp_states *state;
1547 		} qports;
1548 	} data;
1549 };
1550 
qeth_bridgeport_makerc(struct qeth_card * card,struct qeth_ipa_cmd * cmd)1551 static int qeth_bridgeport_makerc(struct qeth_card *card,
1552 				  struct qeth_ipa_cmd *cmd)
1553 {
1554 	struct qeth_ipacmd_setbridgeport *sbp = &cmd->data.sbp;
1555 	enum qeth_ipa_sbp_cmd setcmd = sbp->hdr.command_code;
1556 	u16 ipa_rc = cmd->hdr.return_code;
1557 	u16 sbp_rc = sbp->hdr.return_code;
1558 	int rc;
1559 
1560 	if (ipa_rc == IPA_RC_SUCCESS && sbp_rc == IPA_RC_SUCCESS)
1561 		return 0;
1562 
1563 	if ((IS_IQD(card) && ipa_rc == IPA_RC_SUCCESS) ||
1564 	    (!IS_IQD(card) && ipa_rc == sbp_rc)) {
1565 		switch (sbp_rc) {
1566 		case IPA_RC_SUCCESS:
1567 			rc = 0;
1568 			break;
1569 		case IPA_RC_L2_UNSUPPORTED_CMD:
1570 		case IPA_RC_UNSUPPORTED_COMMAND:
1571 			rc = -EOPNOTSUPP;
1572 			break;
1573 		case IPA_RC_SBP_OSA_NOT_CONFIGURED:
1574 		case IPA_RC_SBP_IQD_NOT_CONFIGURED:
1575 			rc = -ENODEV; /* maybe not the best code here? */
1576 			dev_err(&card->gdev->dev,
1577 	"The device is not configured as a Bridge Port\n");
1578 			break;
1579 		case IPA_RC_SBP_OSA_OS_MISMATCH:
1580 		case IPA_RC_SBP_IQD_OS_MISMATCH:
1581 			rc = -EPERM;
1582 			dev_err(&card->gdev->dev,
1583 	"A Bridge Port is already configured by a different operating system\n");
1584 			break;
1585 		case IPA_RC_SBP_OSA_ANO_DEV_PRIMARY:
1586 		case IPA_RC_SBP_IQD_ANO_DEV_PRIMARY:
1587 			switch (setcmd) {
1588 			case IPA_SBP_SET_PRIMARY_BRIDGE_PORT:
1589 				rc = -EEXIST;
1590 				dev_err(&card->gdev->dev,
1591 	"The LAN already has a primary Bridge Port\n");
1592 				break;
1593 			case IPA_SBP_SET_SECONDARY_BRIDGE_PORT:
1594 				rc = -EBUSY;
1595 				dev_err(&card->gdev->dev,
1596 	"The device is already a primary Bridge Port\n");
1597 				break;
1598 			default:
1599 				rc = -EIO;
1600 			}
1601 			break;
1602 		case IPA_RC_SBP_OSA_CURRENT_SECOND:
1603 		case IPA_RC_SBP_IQD_CURRENT_SECOND:
1604 			rc = -EBUSY;
1605 			dev_err(&card->gdev->dev,
1606 	"The device is already a secondary Bridge Port\n");
1607 			break;
1608 		case IPA_RC_SBP_OSA_LIMIT_SECOND:
1609 		case IPA_RC_SBP_IQD_LIMIT_SECOND:
1610 			rc = -EEXIST;
1611 			dev_err(&card->gdev->dev,
1612 	"The LAN cannot have more secondary Bridge Ports\n");
1613 			break;
1614 		case IPA_RC_SBP_OSA_CURRENT_PRIMARY:
1615 		case IPA_RC_SBP_IQD_CURRENT_PRIMARY:
1616 			rc = -EBUSY;
1617 			dev_err(&card->gdev->dev,
1618 	"The device is already a primary Bridge Port\n");
1619 			break;
1620 		case IPA_RC_SBP_OSA_NOT_AUTHD_BY_ZMAN:
1621 		case IPA_RC_SBP_IQD_NOT_AUTHD_BY_ZMAN:
1622 			rc = -EACCES;
1623 			dev_err(&card->gdev->dev,
1624 	"The device is not authorized to be a Bridge Port\n");
1625 			break;
1626 		default:
1627 			rc = -EIO;
1628 		}
1629 	} else {
1630 		switch (ipa_rc) {
1631 		case IPA_RC_NOTSUPP:
1632 			rc = -EOPNOTSUPP;
1633 			break;
1634 		case IPA_RC_UNSUPPORTED_COMMAND:
1635 			rc = -EOPNOTSUPP;
1636 			break;
1637 		default:
1638 			rc = -EIO;
1639 		}
1640 	}
1641 
1642 	if (rc) {
1643 		QETH_CARD_TEXT_(card, 2, "SBPi%04x", ipa_rc);
1644 		QETH_CARD_TEXT_(card, 2, "SBPc%04x", sbp_rc);
1645 	}
1646 	return rc;
1647 }
1648 
qeth_sbp_build_cmd(struct qeth_card * card,enum qeth_ipa_sbp_cmd sbp_cmd,unsigned int data_length)1649 static struct qeth_cmd_buffer *qeth_sbp_build_cmd(struct qeth_card *card,
1650 						  enum qeth_ipa_sbp_cmd sbp_cmd,
1651 						  unsigned int data_length)
1652 {
1653 	enum qeth_ipa_cmds ipa_cmd = IS_IQD(card) ? IPA_CMD_SETBRIDGEPORT_IQD :
1654 						    IPA_CMD_SETBRIDGEPORT_OSA;
1655 	struct qeth_ipacmd_sbp_hdr *hdr;
1656 	struct qeth_cmd_buffer *iob;
1657 
1658 	iob = qeth_ipa_alloc_cmd(card, ipa_cmd, QETH_PROT_NONE,
1659 				 data_length +
1660 				 offsetof(struct qeth_ipacmd_setbridgeport,
1661 					  data));
1662 	if (!iob)
1663 		return iob;
1664 
1665 	hdr = &__ipa_cmd(iob)->data.sbp.hdr;
1666 	hdr->cmdlength = sizeof(*hdr) + data_length;
1667 	hdr->command_code = sbp_cmd;
1668 	hdr->used_total = 1;
1669 	hdr->seq_no = 1;
1670 	return iob;
1671 }
1672 
qeth_bridgeport_query_support_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)1673 static int qeth_bridgeport_query_support_cb(struct qeth_card *card,
1674 	struct qeth_reply *reply, unsigned long data)
1675 {
1676 	struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1677 	struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1678 	int rc;
1679 
1680 	QETH_CARD_TEXT(card, 2, "brqsupcb");
1681 	rc = qeth_bridgeport_makerc(card, cmd);
1682 	if (rc)
1683 		return rc;
1684 
1685 	cbctl->data.supported =
1686 		cmd->data.sbp.data.query_cmds_supp.supported_cmds;
1687 	return 0;
1688 }
1689 
1690 /**
1691  * qeth_bridgeport_query_support() - store bitmask of supported subfunctions.
1692  * @card:			     qeth_card structure pointer.
1693  *
1694  * Sets bitmask of supported setbridgeport subfunctions in the qeth_card
1695  * strucutre: card->options.sbp.supported_funcs.
1696  */
qeth_bridgeport_query_support(struct qeth_card * card)1697 static void qeth_bridgeport_query_support(struct qeth_card *card)
1698 {
1699 	struct qeth_cmd_buffer *iob;
1700 	struct _qeth_sbp_cbctl cbctl;
1701 
1702 	QETH_CARD_TEXT(card, 2, "brqsuppo");
1703 	iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_COMMANDS_SUPPORTED,
1704 				 SBP_DATA_SIZEOF(query_cmds_supp));
1705 	if (!iob)
1706 		return;
1707 
1708 	if (qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_support_cb,
1709 			      &cbctl)) {
1710 		card->options.sbp.role = QETH_SBP_ROLE_NONE;
1711 		card->options.sbp.supported_funcs = 0;
1712 		return;
1713 	}
1714 	card->options.sbp.supported_funcs = cbctl.data.supported;
1715 }
1716 
qeth_bridgeport_query_ports_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)1717 static int qeth_bridgeport_query_ports_cb(struct qeth_card *card,
1718 	struct qeth_reply *reply, unsigned long data)
1719 {
1720 	struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1721 	struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1722 	struct qeth_sbp_port_data *qports;
1723 	int rc;
1724 
1725 	QETH_CARD_TEXT(card, 2, "brqprtcb");
1726 	rc = qeth_bridgeport_makerc(card, cmd);
1727 	if (rc)
1728 		return rc;
1729 
1730 	qports = &cmd->data.sbp.data.port_data;
1731 	if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1732 		QETH_CARD_TEXT_(card, 2, "SBPs%04x", qports->entry_length);
1733 		return -EINVAL;
1734 	}
1735 	/* first entry contains the state of the local port */
1736 	if (qports->num_entries > 0) {
1737 		if (cbctl->data.qports.role)
1738 			*cbctl->data.qports.role = qports->entry[0].role;
1739 		if (cbctl->data.qports.state)
1740 			*cbctl->data.qports.state = qports->entry[0].state;
1741 	}
1742 	return 0;
1743 }
1744 
1745 /**
1746  * qeth_bridgeport_query_ports() - query local bridgeport status.
1747  * @card:			   qeth_card structure pointer.
1748  * @role:   Role of the port: 0-none, 1-primary, 2-secondary.
1749  * @state:  State of the port: 0-inactive, 1-standby, 2-active.
1750  *
1751  * Returns negative errno-compatible error indication or 0 on success.
1752  *
1753  * 'role' and 'state' are not updated in case of hardware operation failure.
1754  */
qeth_bridgeport_query_ports(struct qeth_card * card,enum qeth_sbp_roles * role,enum qeth_sbp_states * state)1755 int qeth_bridgeport_query_ports(struct qeth_card *card,
1756 	enum qeth_sbp_roles *role, enum qeth_sbp_states *state)
1757 {
1758 	struct qeth_cmd_buffer *iob;
1759 	struct _qeth_sbp_cbctl cbctl = {
1760 		.data = {
1761 			.qports = {
1762 				.role = role,
1763 				.state = state,
1764 			},
1765 		},
1766 	};
1767 
1768 	QETH_CARD_TEXT(card, 2, "brqports");
1769 	if (!(card->options.sbp.supported_funcs & IPA_SBP_QUERY_BRIDGE_PORTS))
1770 		return -EOPNOTSUPP;
1771 	iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_BRIDGE_PORTS, 0);
1772 	if (!iob)
1773 		return -ENOMEM;
1774 
1775 	return qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_ports_cb,
1776 				 &cbctl);
1777 }
1778 
qeth_bridgeport_set_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)1779 static int qeth_bridgeport_set_cb(struct qeth_card *card,
1780 	struct qeth_reply *reply, unsigned long data)
1781 {
1782 	struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
1783 
1784 	QETH_CARD_TEXT(card, 2, "brsetrcb");
1785 	return qeth_bridgeport_makerc(card, cmd);
1786 }
1787 
1788 /**
1789  * qeth_bridgeport_setrole() - Assign primary role to the port.
1790  * @card:		       qeth_card structure pointer.
1791  * @role:		       Role to assign.
1792  *
1793  * Returns negative errno-compatible error indication or 0 on success.
1794  */
qeth_bridgeport_setrole(struct qeth_card * card,enum qeth_sbp_roles role)1795 int qeth_bridgeport_setrole(struct qeth_card *card, enum qeth_sbp_roles role)
1796 {
1797 	struct qeth_cmd_buffer *iob;
1798 	enum qeth_ipa_sbp_cmd setcmd;
1799 	unsigned int cmdlength = 0;
1800 
1801 	QETH_CARD_TEXT(card, 2, "brsetrol");
1802 	switch (role) {
1803 	case QETH_SBP_ROLE_NONE:
1804 		setcmd = IPA_SBP_RESET_BRIDGE_PORT_ROLE;
1805 		break;
1806 	case QETH_SBP_ROLE_PRIMARY:
1807 		setcmd = IPA_SBP_SET_PRIMARY_BRIDGE_PORT;
1808 		cmdlength = SBP_DATA_SIZEOF(set_primary);
1809 		break;
1810 	case QETH_SBP_ROLE_SECONDARY:
1811 		setcmd = IPA_SBP_SET_SECONDARY_BRIDGE_PORT;
1812 		break;
1813 	default:
1814 		return -EINVAL;
1815 	}
1816 	if (!(card->options.sbp.supported_funcs & setcmd))
1817 		return -EOPNOTSUPP;
1818 	iob = qeth_sbp_build_cmd(card, setcmd, cmdlength);
1819 	if (!iob)
1820 		return -ENOMEM;
1821 
1822 	return qeth_send_ipa_cmd(card, iob, qeth_bridgeport_set_cb, NULL);
1823 }
1824 
qeth_bridgeport_an_set_cb(void * priv,struct chsc_pnso_naid_l2 * entry)1825 static void qeth_bridgeport_an_set_cb(void *priv,
1826 				      struct chsc_pnso_naid_l2 *entry)
1827 {
1828 	struct qeth_card *card = (struct qeth_card *)priv;
1829 	u8 code;
1830 
1831 	code = IPA_ADDR_CHANGE_CODE_MACADDR;
1832 	if (entry->addr_lnid.lnid < VLAN_N_VID)
1833 		code |= IPA_ADDR_CHANGE_CODE_VLANID;
1834 	qeth_bridge_emit_host_event(card, anev_reg_unreg, code,
1835 				    (struct net_if_token *)&entry->nit,
1836 				    (struct mac_addr_lnid *)&entry->addr_lnid);
1837 }
1838 
1839 /**
1840  * qeth_bridgeport_an_set() - Enable or disable bridgeport address notification
1841  * @card:		      qeth_card structure pointer.
1842  * @enable:		      0 - disable, non-zero - enable notifications
1843  *
1844  * Returns negative errno-compatible error indication or 0 on success.
1845  *
1846  * On enable, emits a series of address notifications udev events for all
1847  * currently registered hosts.
1848  */
qeth_bridgeport_an_set(struct qeth_card * card,int enable)1849 int qeth_bridgeport_an_set(struct qeth_card *card, int enable)
1850 {
1851 	int rc;
1852 
1853 	if (!card->options.sbp.supported_funcs)
1854 		return -EOPNOTSUPP;
1855 
1856 	if (enable) {
1857 		qeth_bridge_emit_host_event(card, anev_reset, 0, NULL, NULL);
1858 		qeth_l2_set_pnso_mode(card, QETH_PNSO_BRIDGEPORT);
1859 		rc = qeth_l2_pnso(card, PNSO_OC_NET_BRIDGE_INFO, 1,
1860 				  qeth_bridgeport_an_set_cb, card);
1861 		if (rc)
1862 			qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
1863 	} else {
1864 		rc = qeth_l2_pnso(card, PNSO_OC_NET_BRIDGE_INFO, 0, NULL, NULL);
1865 		qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
1866 	}
1867 	return rc;
1868 }
1869 
1870 /* VNIC Characteristics support */
1871 
1872 /* handle VNICC IPA command return codes; convert to error codes */
qeth_l2_vnicc_makerc(struct qeth_card * card,u16 ipa_rc)1873 static int qeth_l2_vnicc_makerc(struct qeth_card *card, u16 ipa_rc)
1874 {
1875 	int rc;
1876 
1877 	switch (ipa_rc) {
1878 	case IPA_RC_SUCCESS:
1879 		return ipa_rc;
1880 	case IPA_RC_L2_UNSUPPORTED_CMD:
1881 	case IPA_RC_NOTSUPP:
1882 		rc = -EOPNOTSUPP;
1883 		break;
1884 	case IPA_RC_VNICC_OOSEQ:
1885 		rc = -EALREADY;
1886 		break;
1887 	case IPA_RC_VNICC_VNICBP:
1888 		rc = -EBUSY;
1889 		break;
1890 	case IPA_RC_L2_ADDR_TABLE_FULL:
1891 		rc = -ENOSPC;
1892 		break;
1893 	case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
1894 		rc = -EACCES;
1895 		break;
1896 	default:
1897 		rc = -EIO;
1898 	}
1899 
1900 	QETH_CARD_TEXT_(card, 2, "err%04x", ipa_rc);
1901 	return rc;
1902 }
1903 
1904 /* generic VNICC request call back */
qeth_l2_vnicc_request_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)1905 static int qeth_l2_vnicc_request_cb(struct qeth_card *card,
1906 				    struct qeth_reply *reply,
1907 				    unsigned long data)
1908 {
1909 	struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1910 	struct qeth_ipacmd_vnicc *rep = &cmd->data.vnicc;
1911 	u32 sub_cmd = cmd->data.vnicc.hdr.sub_command;
1912 
1913 	QETH_CARD_TEXT(card, 2, "vniccrcb");
1914 	if (cmd->hdr.return_code)
1915 		return qeth_l2_vnicc_makerc(card, cmd->hdr.return_code);
1916 	/* return results to caller */
1917 	card->options.vnicc.sup_chars = rep->vnicc_cmds.supported;
1918 	card->options.vnicc.cur_chars = rep->vnicc_cmds.enabled;
1919 
1920 	if (sub_cmd == IPA_VNICC_QUERY_CMDS)
1921 		*(u32 *)reply->param = rep->data.query_cmds.sup_cmds;
1922 	else if (sub_cmd == IPA_VNICC_GET_TIMEOUT)
1923 		*(u32 *)reply->param = rep->data.getset_timeout.timeout;
1924 
1925 	return 0;
1926 }
1927 
qeth_l2_vnicc_build_cmd(struct qeth_card * card,u32 vnicc_cmd,unsigned int data_length)1928 static struct qeth_cmd_buffer *qeth_l2_vnicc_build_cmd(struct qeth_card *card,
1929 						       u32 vnicc_cmd,
1930 						       unsigned int data_length)
1931 {
1932 	struct qeth_ipacmd_vnicc_hdr *hdr;
1933 	struct qeth_cmd_buffer *iob;
1934 
1935 	iob = qeth_ipa_alloc_cmd(card, IPA_CMD_VNICC, QETH_PROT_NONE,
1936 				 data_length +
1937 				 offsetof(struct qeth_ipacmd_vnicc, data));
1938 	if (!iob)
1939 		return NULL;
1940 
1941 	hdr = &__ipa_cmd(iob)->data.vnicc.hdr;
1942 	hdr->data_length = sizeof(*hdr) + data_length;
1943 	hdr->sub_command = vnicc_cmd;
1944 	return iob;
1945 }
1946 
1947 /* VNICC query VNIC characteristics request */
qeth_l2_vnicc_query_chars(struct qeth_card * card)1948 static int qeth_l2_vnicc_query_chars(struct qeth_card *card)
1949 {
1950 	struct qeth_cmd_buffer *iob;
1951 
1952 	QETH_CARD_TEXT(card, 2, "vniccqch");
1953 	iob = qeth_l2_vnicc_build_cmd(card, IPA_VNICC_QUERY_CHARS, 0);
1954 	if (!iob)
1955 		return -ENOMEM;
1956 
1957 	return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, NULL);
1958 }
1959 
1960 /* VNICC query sub commands request */
qeth_l2_vnicc_query_cmds(struct qeth_card * card,u32 vnic_char,u32 * sup_cmds)1961 static int qeth_l2_vnicc_query_cmds(struct qeth_card *card, u32 vnic_char,
1962 				    u32 *sup_cmds)
1963 {
1964 	struct qeth_cmd_buffer *iob;
1965 
1966 	QETH_CARD_TEXT(card, 2, "vniccqcm");
1967 	iob = qeth_l2_vnicc_build_cmd(card, IPA_VNICC_QUERY_CMDS,
1968 				      VNICC_DATA_SIZEOF(query_cmds));
1969 	if (!iob)
1970 		return -ENOMEM;
1971 
1972 	__ipa_cmd(iob)->data.vnicc.data.query_cmds.vnic_char = vnic_char;
1973 
1974 	return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, sup_cmds);
1975 }
1976 
1977 /* VNICC enable/disable characteristic request */
qeth_l2_vnicc_set_char(struct qeth_card * card,u32 vnic_char,u32 cmd)1978 static int qeth_l2_vnicc_set_char(struct qeth_card *card, u32 vnic_char,
1979 				      u32 cmd)
1980 {
1981 	struct qeth_cmd_buffer *iob;
1982 
1983 	QETH_CARD_TEXT(card, 2, "vniccedc");
1984 	iob = qeth_l2_vnicc_build_cmd(card, cmd, VNICC_DATA_SIZEOF(set_char));
1985 	if (!iob)
1986 		return -ENOMEM;
1987 
1988 	__ipa_cmd(iob)->data.vnicc.data.set_char.vnic_char = vnic_char;
1989 
1990 	return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, NULL);
1991 }
1992 
1993 /* VNICC get/set timeout for characteristic request */
qeth_l2_vnicc_getset_timeout(struct qeth_card * card,u32 vnicc,u32 cmd,u32 * timeout)1994 static int qeth_l2_vnicc_getset_timeout(struct qeth_card *card, u32 vnicc,
1995 					u32 cmd, u32 *timeout)
1996 {
1997 	struct qeth_vnicc_getset_timeout *getset_timeout;
1998 	struct qeth_cmd_buffer *iob;
1999 
2000 	QETH_CARD_TEXT(card, 2, "vniccgst");
2001 	iob = qeth_l2_vnicc_build_cmd(card, cmd,
2002 				      VNICC_DATA_SIZEOF(getset_timeout));
2003 	if (!iob)
2004 		return -ENOMEM;
2005 
2006 	getset_timeout = &__ipa_cmd(iob)->data.vnicc.data.getset_timeout;
2007 	getset_timeout->vnic_char = vnicc;
2008 
2009 	if (cmd == IPA_VNICC_SET_TIMEOUT)
2010 		getset_timeout->timeout = *timeout;
2011 
2012 	return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, timeout);
2013 }
2014 
2015 /* recover user timeout setting */
qeth_l2_vnicc_recover_timeout(struct qeth_card * card,u32 vnicc,u32 * timeout)2016 static bool qeth_l2_vnicc_recover_timeout(struct qeth_card *card, u32 vnicc,
2017 					  u32 *timeout)
2018 {
2019 	if (card->options.vnicc.sup_chars & vnicc &&
2020 	    card->options.vnicc.getset_timeout_sup & vnicc &&
2021 	    !qeth_l2_vnicc_getset_timeout(card, vnicc, IPA_VNICC_SET_TIMEOUT,
2022 					  timeout))
2023 		return false;
2024 	*timeout = QETH_VNICC_DEFAULT_TIMEOUT;
2025 	return true;
2026 }
2027 
2028 /* set current VNICC flag state; called from sysfs store function */
qeth_l2_vnicc_set_state(struct qeth_card * card,u32 vnicc,bool state)2029 int qeth_l2_vnicc_set_state(struct qeth_card *card, u32 vnicc, bool state)
2030 {
2031 	int rc = 0;
2032 	u32 cmd;
2033 
2034 	QETH_CARD_TEXT(card, 2, "vniccsch");
2035 
2036 	/* check if characteristic and enable/disable are supported */
2037 	if (!(card->options.vnicc.sup_chars & vnicc) ||
2038 	    !(card->options.vnicc.set_char_sup & vnicc))
2039 		return -EOPNOTSUPP;
2040 
2041 	if (qeth_bridgeport_is_in_use(card))
2042 		return -EBUSY;
2043 
2044 	/* set enable/disable command and store wanted characteristic */
2045 	if (state) {
2046 		cmd = IPA_VNICC_ENABLE;
2047 		card->options.vnicc.wanted_chars |= vnicc;
2048 	} else {
2049 		cmd = IPA_VNICC_DISABLE;
2050 		card->options.vnicc.wanted_chars &= ~vnicc;
2051 	}
2052 
2053 	/* do we need to do anything? */
2054 	if (card->options.vnicc.cur_chars == card->options.vnicc.wanted_chars)
2055 		return rc;
2056 
2057 	/* if card is not ready, simply stop here */
2058 	if (!qeth_card_hw_is_reachable(card)) {
2059 		if (state)
2060 			card->options.vnicc.cur_chars |= vnicc;
2061 		else
2062 			card->options.vnicc.cur_chars &= ~vnicc;
2063 		return rc;
2064 	}
2065 
2066 	rc = qeth_l2_vnicc_set_char(card, vnicc, cmd);
2067 	if (rc)
2068 		card->options.vnicc.wanted_chars =
2069 			card->options.vnicc.cur_chars;
2070 	else {
2071 		/* successful online VNICC change; handle special cases */
2072 		if (state && vnicc == QETH_VNICC_RX_BCAST)
2073 			card->options.vnicc.rx_bcast_enabled = true;
2074 		if (!state && vnicc == QETH_VNICC_LEARNING)
2075 			qeth_l2_vnicc_recover_timeout(card, vnicc,
2076 					&card->options.vnicc.learning_timeout);
2077 	}
2078 
2079 	return rc;
2080 }
2081 
2082 /* get current VNICC flag state; called from sysfs show function */
qeth_l2_vnicc_get_state(struct qeth_card * card,u32 vnicc,bool * state)2083 int qeth_l2_vnicc_get_state(struct qeth_card *card, u32 vnicc, bool *state)
2084 {
2085 	int rc = 0;
2086 
2087 	QETH_CARD_TEXT(card, 2, "vniccgch");
2088 
2089 	/* check if characteristic is supported */
2090 	if (!(card->options.vnicc.sup_chars & vnicc))
2091 		return -EOPNOTSUPP;
2092 
2093 	if (qeth_bridgeport_is_in_use(card))
2094 		return -EBUSY;
2095 
2096 	/* if card is ready, query current VNICC state */
2097 	if (qeth_card_hw_is_reachable(card))
2098 		rc = qeth_l2_vnicc_query_chars(card);
2099 
2100 	*state = (card->options.vnicc.cur_chars & vnicc) ? true : false;
2101 	return rc;
2102 }
2103 
2104 /* set VNICC timeout; called from sysfs store function. Currently, only learning
2105  * supports timeout
2106  */
qeth_l2_vnicc_set_timeout(struct qeth_card * card,u32 timeout)2107 int qeth_l2_vnicc_set_timeout(struct qeth_card *card, u32 timeout)
2108 {
2109 	int rc = 0;
2110 
2111 	QETH_CARD_TEXT(card, 2, "vniccsto");
2112 
2113 	/* check if characteristic and set_timeout are supported */
2114 	if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
2115 	    !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
2116 		return -EOPNOTSUPP;
2117 
2118 	if (qeth_bridgeport_is_in_use(card))
2119 		return -EBUSY;
2120 
2121 	/* do we need to do anything? */
2122 	if (card->options.vnicc.learning_timeout == timeout)
2123 		return rc;
2124 
2125 	/* if card is not ready, simply store the value internally and return */
2126 	if (!qeth_card_hw_is_reachable(card)) {
2127 		card->options.vnicc.learning_timeout = timeout;
2128 		return rc;
2129 	}
2130 
2131 	/* send timeout value to card; if successful, store value internally */
2132 	rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
2133 					  IPA_VNICC_SET_TIMEOUT, &timeout);
2134 	if (!rc)
2135 		card->options.vnicc.learning_timeout = timeout;
2136 
2137 	return rc;
2138 }
2139 
2140 /* get current VNICC timeout; called from sysfs show function. Currently, only
2141  * learning supports timeout
2142  */
qeth_l2_vnicc_get_timeout(struct qeth_card * card,u32 * timeout)2143 int qeth_l2_vnicc_get_timeout(struct qeth_card *card, u32 *timeout)
2144 {
2145 	int rc = 0;
2146 
2147 	QETH_CARD_TEXT(card, 2, "vniccgto");
2148 
2149 	/* check if characteristic and get_timeout are supported */
2150 	if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
2151 	    !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
2152 		return -EOPNOTSUPP;
2153 
2154 	if (qeth_bridgeport_is_in_use(card))
2155 		return -EBUSY;
2156 
2157 	/* if card is ready, get timeout. Otherwise, just return stored value */
2158 	*timeout = card->options.vnicc.learning_timeout;
2159 	if (qeth_card_hw_is_reachable(card))
2160 		rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
2161 						  IPA_VNICC_GET_TIMEOUT,
2162 						  timeout);
2163 
2164 	return rc;
2165 }
2166 
2167 /* check if VNICC is currently enabled */
_qeth_l2_vnicc_is_in_use(struct qeth_card * card)2168 static bool _qeth_l2_vnicc_is_in_use(struct qeth_card *card)
2169 {
2170 	if (!card->options.vnicc.sup_chars)
2171 		return false;
2172 	/* default values are only OK if rx_bcast was not enabled by user
2173 	 * or the card is offline.
2174 	 */
2175 	if (card->options.vnicc.cur_chars == QETH_VNICC_DEFAULT) {
2176 		if (!card->options.vnicc.rx_bcast_enabled ||
2177 		    !qeth_card_hw_is_reachable(card))
2178 			return false;
2179 	}
2180 	return true;
2181 }
2182 
2183 /**
2184  *	qeth_bridgeport_allowed - are any qeth_bridgeport functions allowed?
2185  *	@card: qeth_card structure pointer
2186  *
2187  *	qeth_bridgeport functionality is mutually exclusive with usage of the
2188  *	VNIC Characteristics and dev2br address notifications
2189  */
qeth_bridgeport_allowed(struct qeth_card * card)2190 bool qeth_bridgeport_allowed(struct qeth_card *card)
2191 {
2192 	struct qeth_priv *priv = netdev_priv(card->dev);
2193 
2194 	return (!_qeth_l2_vnicc_is_in_use(card) &&
2195 		!(priv->brport_features & BR_LEARNING_SYNC));
2196 }
2197 
2198 /* recover user characteristic setting */
qeth_l2_vnicc_recover_char(struct qeth_card * card,u32 vnicc,bool enable)2199 static bool qeth_l2_vnicc_recover_char(struct qeth_card *card, u32 vnicc,
2200 				       bool enable)
2201 {
2202 	u32 cmd = enable ? IPA_VNICC_ENABLE : IPA_VNICC_DISABLE;
2203 
2204 	if (card->options.vnicc.sup_chars & vnicc &&
2205 	    card->options.vnicc.set_char_sup & vnicc &&
2206 	    !qeth_l2_vnicc_set_char(card, vnicc, cmd))
2207 		return false;
2208 	card->options.vnicc.wanted_chars &= ~vnicc;
2209 	card->options.vnicc.wanted_chars |= QETH_VNICC_DEFAULT & vnicc;
2210 	return true;
2211 }
2212 
2213 /* (re-)initialize VNICC */
qeth_l2_vnicc_init(struct qeth_card * card)2214 static void qeth_l2_vnicc_init(struct qeth_card *card)
2215 {
2216 	u32 *timeout = &card->options.vnicc.learning_timeout;
2217 	bool enable, error = false;
2218 	unsigned int chars_len, i;
2219 	unsigned long chars_tmp;
2220 	u32 sup_cmds, vnicc;
2221 
2222 	QETH_CARD_TEXT(card, 2, "vniccini");
2223 	/* reset rx_bcast */
2224 	card->options.vnicc.rx_bcast_enabled = 0;
2225 	/* initial query and storage of VNIC characteristics */
2226 	if (qeth_l2_vnicc_query_chars(card)) {
2227 		if (card->options.vnicc.wanted_chars != QETH_VNICC_DEFAULT ||
2228 		    *timeout != QETH_VNICC_DEFAULT_TIMEOUT)
2229 			dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
2230 		/* fail quietly if user didn't change the default config */
2231 		card->options.vnicc.sup_chars = 0;
2232 		card->options.vnicc.cur_chars = 0;
2233 		card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
2234 		return;
2235 	}
2236 	/* get supported commands for each supported characteristic */
2237 	chars_tmp = card->options.vnicc.sup_chars;
2238 	chars_len = sizeof(card->options.vnicc.sup_chars) * BITS_PER_BYTE;
2239 	for_each_set_bit(i, &chars_tmp, chars_len) {
2240 		vnicc = BIT(i);
2241 		if (qeth_l2_vnicc_query_cmds(card, vnicc, &sup_cmds)) {
2242 			sup_cmds = 0;
2243 			error = true;
2244 		}
2245 		if ((sup_cmds & IPA_VNICC_SET_TIMEOUT) &&
2246 		    (sup_cmds & IPA_VNICC_GET_TIMEOUT))
2247 			card->options.vnicc.getset_timeout_sup |= vnicc;
2248 		else
2249 			card->options.vnicc.getset_timeout_sup &= ~vnicc;
2250 		if ((sup_cmds & IPA_VNICC_ENABLE) &&
2251 		    (sup_cmds & IPA_VNICC_DISABLE))
2252 			card->options.vnicc.set_char_sup |= vnicc;
2253 		else
2254 			card->options.vnicc.set_char_sup &= ~vnicc;
2255 	}
2256 	/* enforce assumed default values and recover settings, if changed  */
2257 	error |= qeth_l2_vnicc_recover_timeout(card, QETH_VNICC_LEARNING,
2258 					       timeout);
2259 	/* Change chars, if necessary  */
2260 	chars_tmp = card->options.vnicc.wanted_chars ^
2261 		    card->options.vnicc.cur_chars;
2262 	chars_len = sizeof(card->options.vnicc.wanted_chars) * BITS_PER_BYTE;
2263 	for_each_set_bit(i, &chars_tmp, chars_len) {
2264 		vnicc = BIT(i);
2265 		enable = card->options.vnicc.wanted_chars & vnicc;
2266 		error |= qeth_l2_vnicc_recover_char(card, vnicc, enable);
2267 	}
2268 	if (error)
2269 		dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
2270 }
2271 
2272 /* configure default values of VNIC characteristics */
qeth_l2_vnicc_set_defaults(struct qeth_card * card)2273 static void qeth_l2_vnicc_set_defaults(struct qeth_card *card)
2274 {
2275 	/* characteristics values */
2276 	card->options.vnicc.sup_chars = QETH_VNICC_ALL;
2277 	card->options.vnicc.cur_chars = QETH_VNICC_DEFAULT;
2278 	card->options.vnicc.learning_timeout = QETH_VNICC_DEFAULT_TIMEOUT;
2279 	/* supported commands */
2280 	card->options.vnicc.set_char_sup = QETH_VNICC_ALL;
2281 	card->options.vnicc.getset_timeout_sup = QETH_VNICC_LEARNING;
2282 	/* settings wanted by users */
2283 	card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
2284 }
2285 
2286 static const struct device_type qeth_l2_devtype = {
2287 	.name = "qeth_layer2",
2288 	.groups = qeth_l2_attr_groups,
2289 };
2290 
qeth_l2_probe_device(struct ccwgroup_device * gdev)2291 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
2292 {
2293 	struct qeth_card *card = dev_get_drvdata(&gdev->dev);
2294 	int rc;
2295 
2296 	qeth_l2_vnicc_set_defaults(card);
2297 	mutex_init(&card->sbp_lock);
2298 
2299 	if (gdev->dev.type) {
2300 		rc = device_add_groups(&gdev->dev, qeth_l2_attr_groups);
2301 		if (rc)
2302 			return rc;
2303 	} else {
2304 		gdev->dev.type = &qeth_l2_devtype;
2305 	}
2306 
2307 	INIT_WORK(&card->rx_mode_work, qeth_l2_rx_mode_work);
2308 	return 0;
2309 }
2310 
qeth_l2_remove_device(struct ccwgroup_device * gdev)2311 static void qeth_l2_remove_device(struct ccwgroup_device *gdev)
2312 {
2313 	struct qeth_card *card = dev_get_drvdata(&gdev->dev);
2314 	struct qeth_priv *priv;
2315 
2316 	if (gdev->dev.type != &qeth_l2_devtype)
2317 		device_remove_groups(&gdev->dev, qeth_l2_attr_groups);
2318 
2319 	qeth_set_allowed_threads(card, 0, 1);
2320 	wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
2321 
2322 	if (gdev->state == CCWGROUP_ONLINE)
2323 		qeth_set_offline(card, card->discipline, false);
2324 
2325 	if (card->dev->reg_state == NETREG_REGISTERED) {
2326 		priv = netdev_priv(card->dev);
2327 		if (priv->brport_features & BR_LEARNING_SYNC) {
2328 			rtnl_lock();
2329 			qeth_l2_br2dev_put();
2330 			rtnl_unlock();
2331 		}
2332 		unregister_netdev(card->dev);
2333 	}
2334 }
2335 
qeth_l2_set_online(struct qeth_card * card,bool carrier_ok)2336 static int qeth_l2_set_online(struct qeth_card *card, bool carrier_ok)
2337 {
2338 	struct net_device *dev = card->dev;
2339 	int rc = 0;
2340 
2341 	qeth_l2_detect_dev2br_support(card);
2342 
2343 	mutex_lock(&card->sbp_lock);
2344 	qeth_bridgeport_query_support(card);
2345 	if (card->options.sbp.supported_funcs) {
2346 		qeth_l2_setup_bridgeport_attrs(card);
2347 		dev_info(&card->gdev->dev,
2348 			 "The device represents a Bridge Capable Port\n");
2349 	}
2350 	mutex_unlock(&card->sbp_lock);
2351 
2352 	qeth_l2_register_dev_addr(card);
2353 
2354 	/* for the rx_bcast characteristic, init VNICC after setmac */
2355 	qeth_l2_vnicc_init(card);
2356 
2357 	qeth_l2_trace_features(card);
2358 
2359 	/* softsetup */
2360 	QETH_CARD_TEXT(card, 2, "softsetp");
2361 
2362 	card->state = CARD_STATE_SOFTSETUP;
2363 
2364 	qeth_set_allowed_threads(card, 0xffffffff, 0);
2365 
2366 	if (dev->reg_state != NETREG_REGISTERED) {
2367 		rc = qeth_l2_setup_netdev(card);
2368 		if (rc)
2369 			goto err_setup;
2370 
2371 		if (carrier_ok)
2372 			netif_carrier_on(dev);
2373 	} else {
2374 		rtnl_lock();
2375 		rc = qeth_set_real_num_tx_queues(card,
2376 						 qeth_tx_actual_queues(card));
2377 		if (rc) {
2378 			rtnl_unlock();
2379 			goto err_set_queues;
2380 		}
2381 
2382 		if (carrier_ok)
2383 			netif_carrier_on(dev);
2384 		else
2385 			netif_carrier_off(dev);
2386 
2387 		netif_device_attach(dev);
2388 		qeth_enable_hw_features(dev);
2389 		qeth_l2_enable_brport_features(card);
2390 
2391 		if (netif_running(dev)) {
2392 			local_bh_disable();
2393 			napi_schedule(&card->napi);
2394 			/* kick-start the NAPI softirq: */
2395 			local_bh_enable();
2396 			qeth_l2_set_rx_mode(dev);
2397 		}
2398 		rtnl_unlock();
2399 	}
2400 	return 0;
2401 
2402 err_set_queues:
2403 err_setup:
2404 	qeth_set_allowed_threads(card, 0, 1);
2405 	card->state = CARD_STATE_DOWN;
2406 	return rc;
2407 }
2408 
qeth_l2_set_offline(struct qeth_card * card)2409 static void qeth_l2_set_offline(struct qeth_card *card)
2410 {
2411 	struct qeth_priv *priv = netdev_priv(card->dev);
2412 
2413 	qeth_set_allowed_threads(card, 0, 1);
2414 	qeth_l2_drain_rx_mode_cache(card);
2415 
2416 	if (card->state == CARD_STATE_SOFTSETUP)
2417 		card->state = CARD_STATE_DOWN;
2418 
2419 	qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
2420 	if (priv->brport_features & BR_LEARNING_SYNC)
2421 		qeth_l2_dev2br_fdb_flush(card);
2422 }
2423 
2424 /* Returns zero if the command is successfully "consumed" */
qeth_l2_control_event(struct qeth_card * card,struct qeth_ipa_cmd * cmd)2425 static int qeth_l2_control_event(struct qeth_card *card,
2426 				 struct qeth_ipa_cmd *cmd)
2427 {
2428 	switch (cmd->hdr.command) {
2429 	case IPA_CMD_SETBRIDGEPORT_OSA:
2430 	case IPA_CMD_SETBRIDGEPORT_IQD:
2431 		if (cmd->data.sbp.hdr.command_code ==
2432 		    IPA_SBP_BRIDGE_PORT_STATE_CHANGE) {
2433 			qeth_bridge_state_change(card, cmd);
2434 			return 0;
2435 		}
2436 
2437 		return 1;
2438 	case IPA_CMD_ADDRESS_CHANGE_NOTIF:
2439 		qeth_addr_change_event(card, cmd);
2440 		return 0;
2441 	default:
2442 		return 1;
2443 	}
2444 }
2445 
2446 const struct qeth_discipline qeth_l2_discipline = {
2447 	.setup = qeth_l2_probe_device,
2448 	.remove = qeth_l2_remove_device,
2449 	.set_online = qeth_l2_set_online,
2450 	.set_offline = qeth_l2_set_offline,
2451 	.control_event_handler = qeth_l2_control_event,
2452 };
2453 EXPORT_SYMBOL_GPL(qeth_l2_discipline);
2454 
qeth_l2_init(void)2455 static int __init qeth_l2_init(void)
2456 {
2457 	pr_info("register layer 2 discipline\n");
2458 	refcount_set(&qeth_l2_switchdev_notify_refcnt, 0);
2459 	return 0;
2460 }
2461 
qeth_l2_exit(void)2462 static void __exit qeth_l2_exit(void)
2463 {
2464 	pr_info("unregister layer 2 discipline\n");
2465 }
2466 
2467 module_init(qeth_l2_init);
2468 module_exit(qeth_l2_exit);
2469 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
2470 MODULE_DESCRIPTION("qeth layer 2 discipline");
2471 MODULE_LICENSE("GPL");
2472