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Merge tag 'armsoc-dt' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
[mirror_ubuntu-hirsute-kernel.git] / drivers / s390 / net / qeth_l2_main.c
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 int ipv, 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], ipv);
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, qeth_get_ip_version(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 * Must be called under rtnl_lock
742 */
743 static int qeth_l2_dev2br_an_set(struct qeth_card *card, bool enable)
744 {
745 int rc;
746
747 if (enable) {
748 QETH_CARD_TEXT(card, 2, "anseton");
749 rc = qeth_l2_pnso(card, PNSO_OC_NET_ADDR_INFO, 1,
750 qeth_l2_dev2br_an_set_cb, card);
751 if (rc == -EAGAIN)
752 /* address notification enabled, but inconsistent
753 * addresses reported -> disable address notification
754 */
755 qeth_l2_pnso(card, PNSO_OC_NET_ADDR_INFO, 0,
756 NULL, NULL);
757 } else {
758 QETH_CARD_TEXT(card, 2, "ansetoff");
759 rc = qeth_l2_pnso(card, PNSO_OC_NET_ADDR_INFO, 0, NULL, NULL);
760 }
761
762 return rc;
763 }
764
765 static int qeth_l2_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
766 struct net_device *dev, u32 filter_mask,
767 int nlflags)
768 {
769 struct qeth_priv *priv = netdev_priv(dev);
770 struct qeth_card *card = dev->ml_priv;
771 u16 mode = BRIDGE_MODE_UNDEF;
772
773 /* Do not even show qeth devs that cannot do bridge_setlink */
774 if (!priv->brport_hw_features || !netif_device_present(dev) ||
775 qeth_bridgeport_is_in_use(card))
776 return -EOPNOTSUPP;
777
778 return ndo_dflt_bridge_getlink(skb, pid, seq, dev,
779 mode, priv->brport_features,
780 priv->brport_hw_features,
781 nlflags, filter_mask, NULL);
782 }
783
784 static const struct nla_policy qeth_brport_policy[IFLA_BRPORT_MAX + 1] = {
785 [IFLA_BRPORT_LEARNING_SYNC] = { .type = NLA_U8 },
786 };
787
788 /**
789 * qeth_l2_bridge_setlink() - set bridgeport attributes
790 * @dev: netdevice
791 * @nlh: netlink message header
792 * @flags: bridge flags (here: BRIDGE_FLAGS_SELF)
793 * @extack: extended ACK report struct
794 *
795 * Called under rtnl_lock
796 */
797 static int qeth_l2_bridge_setlink(struct net_device *dev, struct nlmsghdr *nlh,
798 u16 flags, struct netlink_ext_ack *extack)
799 {
800 struct qeth_priv *priv = netdev_priv(dev);
801 struct nlattr *bp_tb[IFLA_BRPORT_MAX + 1];
802 struct qeth_card *card = dev->ml_priv;
803 struct nlattr *attr, *nested_attr;
804 bool enable, has_protinfo = false;
805 int rem1, rem2;
806 int rc;
807
808 if (!netif_device_present(dev))
809 return -ENODEV;
810 if (!(priv->brport_hw_features))
811 return -EOPNOTSUPP;
812
813 nlmsg_for_each_attr(attr, nlh, sizeof(struct ifinfomsg), rem1) {
814 if (nla_type(attr) == IFLA_PROTINFO) {
815 rc = nla_parse_nested(bp_tb, IFLA_BRPORT_MAX, attr,
816 qeth_brport_policy, extack);
817 if (rc)
818 return rc;
819 has_protinfo = true;
820 } else if (nla_type(attr) == IFLA_AF_SPEC) {
821 nla_for_each_nested(nested_attr, attr, rem2) {
822 if (nla_type(nested_attr) == IFLA_BRIDGE_FLAGS)
823 continue;
824 NL_SET_ERR_MSG_ATTR(extack, nested_attr,
825 "Unsupported attribute");
826 return -EINVAL;
827 }
828 } else {
829 NL_SET_ERR_MSG_ATTR(extack, attr, "Unsupported attribute");
830 return -EINVAL;
831 }
832 }
833 if (!has_protinfo)
834 return 0;
835 if (!bp_tb[IFLA_BRPORT_LEARNING_SYNC])
836 return -EINVAL;
837 enable = !!nla_get_u8(bp_tb[IFLA_BRPORT_LEARNING_SYNC]);
838
839 if (enable == !!(priv->brport_features & BR_LEARNING_SYNC))
840 return 0;
841
842 mutex_lock(&card->sbp_lock);
843 /* do not change anything if BridgePort is enabled */
844 if (qeth_bridgeport_is_in_use(card)) {
845 NL_SET_ERR_MSG(extack, "n/a (BridgePort)");
846 rc = -EBUSY;
847 } else if (enable) {
848 qeth_l2_set_pnso_mode(card, QETH_PNSO_ADDR_INFO);
849 rc = qeth_l2_dev2br_an_set(card, true);
850 if (rc)
851 qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
852 else
853 priv->brport_features |= BR_LEARNING_SYNC;
854 } else {
855 rc = qeth_l2_dev2br_an_set(card, false);
856 if (!rc) {
857 qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
858 priv->brport_features ^= BR_LEARNING_SYNC;
859 qeth_l2_dev2br_fdb_flush(card);
860 }
861 }
862 mutex_unlock(&card->sbp_lock);
863
864 return rc;
865 }
866
867 static const struct net_device_ops qeth_l2_netdev_ops = {
868 .ndo_open = qeth_open,
869 .ndo_stop = qeth_stop,
870 .ndo_get_stats64 = qeth_get_stats64,
871 .ndo_start_xmit = qeth_l2_hard_start_xmit,
872 .ndo_features_check = qeth_features_check,
873 .ndo_select_queue = qeth_l2_select_queue,
874 .ndo_validate_addr = qeth_l2_validate_addr,
875 .ndo_set_rx_mode = qeth_l2_set_rx_mode,
876 .ndo_do_ioctl = qeth_do_ioctl,
877 .ndo_set_mac_address = qeth_l2_set_mac_address,
878 .ndo_vlan_rx_add_vid = qeth_l2_vlan_rx_add_vid,
879 .ndo_vlan_rx_kill_vid = qeth_l2_vlan_rx_kill_vid,
880 .ndo_tx_timeout = qeth_tx_timeout,
881 .ndo_fix_features = qeth_fix_features,
882 .ndo_set_features = qeth_set_features,
883 .ndo_bridge_getlink = qeth_l2_bridge_getlink,
884 .ndo_bridge_setlink = qeth_l2_bridge_setlink,
885 };
886
887 static const struct net_device_ops qeth_osn_netdev_ops = {
888 .ndo_open = qeth_open,
889 .ndo_stop = qeth_stop,
890 .ndo_get_stats64 = qeth_get_stats64,
891 .ndo_start_xmit = qeth_l2_hard_start_xmit,
892 .ndo_validate_addr = eth_validate_addr,
893 .ndo_tx_timeout = qeth_tx_timeout,
894 };
895
896 static int qeth_l2_setup_netdev(struct qeth_card *card)
897 {
898 if (IS_OSN(card)) {
899 card->dev->netdev_ops = &qeth_osn_netdev_ops;
900 card->dev->flags |= IFF_NOARP;
901 goto add_napi;
902 }
903
904 card->dev->needed_headroom = sizeof(struct qeth_hdr);
905 card->dev->netdev_ops = &qeth_l2_netdev_ops;
906 card->dev->priv_flags |= IFF_UNICAST_FLT;
907
908 if (IS_OSM(card)) {
909 card->dev->features |= NETIF_F_VLAN_CHALLENGED;
910 } else {
911 if (!IS_VM_NIC(card))
912 card->dev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
913 card->dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
914 }
915
916 if (IS_OSD(card) && !IS_VM_NIC(card)) {
917 card->dev->features |= NETIF_F_SG;
918 /* OSA 3S and earlier has no RX/TX support */
919 if (qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM)) {
920 card->dev->hw_features |= NETIF_F_IP_CSUM;
921 card->dev->vlan_features |= NETIF_F_IP_CSUM;
922 }
923 }
924 if (qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) {
925 card->dev->hw_features |= NETIF_F_IPV6_CSUM;
926 card->dev->vlan_features |= NETIF_F_IPV6_CSUM;
927 }
928 if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM) ||
929 qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6)) {
930 card->dev->hw_features |= NETIF_F_RXCSUM;
931 card->dev->vlan_features |= NETIF_F_RXCSUM;
932 }
933 if (qeth_is_supported(card, IPA_OUTBOUND_TSO)) {
934 card->dev->hw_features |= NETIF_F_TSO;
935 card->dev->vlan_features |= NETIF_F_TSO;
936 }
937 if (qeth_is_supported6(card, IPA_OUTBOUND_TSO)) {
938 card->dev->hw_features |= NETIF_F_TSO6;
939 card->dev->vlan_features |= NETIF_F_TSO6;
940 }
941
942 if (card->dev->hw_features & (NETIF_F_TSO | NETIF_F_TSO6)) {
943 card->dev->needed_headroom = sizeof(struct qeth_hdr_tso);
944 netif_keep_dst(card->dev);
945 netif_set_gso_max_size(card->dev,
946 PAGE_SIZE * (QDIO_MAX_ELEMENTS_PER_BUFFER - 1));
947 }
948
949 add_napi:
950 netif_napi_add(card->dev, &card->napi, qeth_poll, QETH_NAPI_WEIGHT);
951 return register_netdev(card->dev);
952 }
953
954 static void qeth_l2_trace_features(struct qeth_card *card)
955 {
956 /* Set BridgePort features */
957 QETH_CARD_TEXT(card, 2, "featuSBP");
958 QETH_CARD_HEX(card, 2, &card->options.sbp.supported_funcs,
959 sizeof(card->options.sbp.supported_funcs));
960 /* VNIC Characteristics features */
961 QETH_CARD_TEXT(card, 2, "feaVNICC");
962 QETH_CARD_HEX(card, 2, &card->options.vnicc.sup_chars,
963 sizeof(card->options.vnicc.sup_chars));
964 }
965
966 static void qeth_l2_setup_bridgeport_attrs(struct qeth_card *card)
967 {
968 if (!card->options.sbp.reflect_promisc &&
969 card->options.sbp.role != QETH_SBP_ROLE_NONE) {
970 /* Conditional to avoid spurious error messages */
971 qeth_bridgeport_setrole(card, card->options.sbp.role);
972 /* Let the callback function refresh the stored role value. */
973 qeth_bridgeport_query_ports(card, &card->options.sbp.role,
974 NULL);
975 }
976 if (card->options.sbp.hostnotification) {
977 if (qeth_bridgeport_an_set(card, 1))
978 card->options.sbp.hostnotification = 0;
979 }
980 }
981
982 /**
983 * qeth_l2_detect_dev2br_support() -
984 * Detect whether this card supports 'dev to bridge fdb network address
985 * change notification' and thus can support the learning_sync bridgeport
986 * attribute
987 * @card: qeth_card structure pointer
988 *
989 * This is a destructive test and must be called before dev2br or
990 * bridgeport address notification is enabled!
991 */
992 static void qeth_l2_detect_dev2br_support(struct qeth_card *card)
993 {
994 struct qeth_priv *priv = netdev_priv(card->dev);
995 bool dev2br_supported;
996 int rc;
997
998 QETH_CARD_TEXT(card, 2, "d2brsup");
999 if (!IS_IQD(card))
1000 return;
1001
1002 /* dev2br requires valid cssid,iid,chid */
1003 if (!card->info.ids_valid) {
1004 dev2br_supported = false;
1005 } else if (css_general_characteristics.enarf) {
1006 dev2br_supported = true;
1007 } else {
1008 /* Old machines don't have the feature bit:
1009 * Probe by testing whether a disable succeeds
1010 */
1011 rc = qeth_l2_pnso(card, PNSO_OC_NET_ADDR_INFO, 0, NULL, NULL);
1012 dev2br_supported = !rc;
1013 }
1014 QETH_CARD_TEXT_(card, 2, "D2Bsup%02x", dev2br_supported);
1015
1016 if (dev2br_supported)
1017 priv->brport_hw_features |= BR_LEARNING_SYNC;
1018 else
1019 priv->brport_hw_features &= ~BR_LEARNING_SYNC;
1020 }
1021
1022 static void qeth_l2_enable_brport_features(struct qeth_card *card)
1023 {
1024 struct qeth_priv *priv = netdev_priv(card->dev);
1025 int rc;
1026
1027 if (priv->brport_features & BR_LEARNING_SYNC) {
1028 if (priv->brport_hw_features & BR_LEARNING_SYNC) {
1029 qeth_l2_set_pnso_mode(card, QETH_PNSO_ADDR_INFO);
1030 rc = qeth_l2_dev2br_an_set(card, true);
1031 if (rc == -EAGAIN) {
1032 /* Recoverable error, retry once */
1033 qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
1034 qeth_l2_dev2br_fdb_flush(card);
1035 qeth_l2_set_pnso_mode(card, QETH_PNSO_ADDR_INFO);
1036 rc = qeth_l2_dev2br_an_set(card, true);
1037 }
1038 if (rc) {
1039 netdev_err(card->dev,
1040 "failed to enable bridge learning_sync: %d\n",
1041 rc);
1042 qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
1043 qeth_l2_dev2br_fdb_flush(card);
1044 priv->brport_features ^= BR_LEARNING_SYNC;
1045 }
1046 } else {
1047 dev_warn(&card->gdev->dev,
1048 "bridge learning_sync not supported\n");
1049 priv->brport_features ^= BR_LEARNING_SYNC;
1050 }
1051 }
1052 }
1053
1054 #ifdef CONFIG_QETH_OSN
1055 static void qeth_osn_assist_cb(struct qeth_card *card,
1056 struct qeth_cmd_buffer *iob,
1057 unsigned int data_length)
1058 {
1059 qeth_notify_cmd(iob, 0);
1060 qeth_put_cmd(iob);
1061 }
1062
1063 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1064 {
1065 struct qeth_cmd_buffer *iob;
1066 struct qeth_card *card;
1067
1068 if (data_len < 0)
1069 return -EINVAL;
1070 if (!dev)
1071 return -ENODEV;
1072 card = dev->ml_priv;
1073 if (!card)
1074 return -ENODEV;
1075 QETH_CARD_TEXT(card, 2, "osnsdmc");
1076 if (!qeth_card_hw_is_reachable(card))
1077 return -ENODEV;
1078
1079 iob = qeth_alloc_cmd(&card->write, IPA_PDU_HEADER_SIZE + data_len, 1,
1080 QETH_IPA_TIMEOUT);
1081 if (!iob)
1082 return -ENOMEM;
1083
1084 qeth_prepare_ipa_cmd(card, iob, (u16) data_len, NULL);
1085
1086 memcpy(__ipa_cmd(iob), data, data_len);
1087 iob->callback = qeth_osn_assist_cb;
1088 return qeth_send_ipa_cmd(card, iob, NULL, NULL);
1089 }
1090 EXPORT_SYMBOL(qeth_osn_assist);
1091
1092 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1093 int (*assist_cb)(struct net_device *, void *),
1094 int (*data_cb)(struct sk_buff *))
1095 {
1096 struct qeth_card *card;
1097 char bus_id[16];
1098 u16 devno;
1099
1100 memcpy(&devno, read_dev_no, 2);
1101 sprintf(bus_id, "0.0.%04x", devno);
1102 card = qeth_get_card_by_busid(bus_id);
1103 if (!card || !IS_OSN(card))
1104 return -ENODEV;
1105 *dev = card->dev;
1106
1107 QETH_CARD_TEXT(card, 2, "osnreg");
1108 if ((assist_cb == NULL) || (data_cb == NULL))
1109 return -EINVAL;
1110 card->osn_info.assist_cb = assist_cb;
1111 card->osn_info.data_cb = data_cb;
1112 return 0;
1113 }
1114 EXPORT_SYMBOL(qeth_osn_register);
1115
1116 void qeth_osn_deregister(struct net_device *dev)
1117 {
1118 struct qeth_card *card;
1119
1120 if (!dev)
1121 return;
1122 card = dev->ml_priv;
1123 if (!card)
1124 return;
1125 QETH_CARD_TEXT(card, 2, "osndereg");
1126 card->osn_info.assist_cb = NULL;
1127 card->osn_info.data_cb = NULL;
1128 }
1129 EXPORT_SYMBOL(qeth_osn_deregister);
1130 #endif
1131
1132 /* SETBRIDGEPORT support, async notifications */
1133
1134 enum qeth_an_event_type {anev_reg_unreg, anev_abort, anev_reset};
1135
1136 /**
1137 * qeth_bridge_emit_host_event() - bridgeport address change notification
1138 * @card: qeth_card structure pointer, for udev events.
1139 * @evtype: "normal" register/unregister, or abort, or reset. For abort
1140 * and reset token and addr_lnid are unused and may be NULL.
1141 * @code: event bitmask: high order bit 0x80 value 1 means removal of an
1142 * object, 0 - addition of an object.
1143 * 0x01 - VLAN, 0x02 - MAC, 0x03 - VLAN and MAC.
1144 * @token: "network token" structure identifying physical address of the port.
1145 * @addr_lnid: pointer to structure with MAC address and VLAN ID.
1146 *
1147 * This function is called when registrations and deregistrations are
1148 * reported by the hardware, and also when notifications are enabled -
1149 * for all currently registered addresses.
1150 */
1151 static void qeth_bridge_emit_host_event(struct qeth_card *card,
1152 enum qeth_an_event_type evtype,
1153 u8 code,
1154 struct net_if_token *token,
1155 struct mac_addr_lnid *addr_lnid)
1156 {
1157 char str[7][32];
1158 char *env[8];
1159 int i = 0;
1160
1161 switch (evtype) {
1162 case anev_reg_unreg:
1163 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=%s",
1164 (code & IPA_ADDR_CHANGE_CODE_REMOVAL)
1165 ? "deregister" : "register");
1166 env[i] = str[i]; i++;
1167 if (code & IPA_ADDR_CHANGE_CODE_VLANID) {
1168 snprintf(str[i], sizeof(str[i]), "VLAN=%d",
1169 addr_lnid->lnid);
1170 env[i] = str[i]; i++;
1171 }
1172 if (code & IPA_ADDR_CHANGE_CODE_MACADDR) {
1173 snprintf(str[i], sizeof(str[i]), "MAC=%pM",
1174 addr_lnid->mac);
1175 env[i] = str[i]; i++;
1176 }
1177 snprintf(str[i], sizeof(str[i]), "NTOK_BUSID=%x.%x.%04x",
1178 token->cssid, token->ssid, token->devnum);
1179 env[i] = str[i]; i++;
1180 snprintf(str[i], sizeof(str[i]), "NTOK_IID=%02x", token->iid);
1181 env[i] = str[i]; i++;
1182 snprintf(str[i], sizeof(str[i]), "NTOK_CHPID=%02x",
1183 token->chpid);
1184 env[i] = str[i]; i++;
1185 snprintf(str[i], sizeof(str[i]), "NTOK_CHID=%04x", token->chid);
1186 env[i] = str[i]; i++;
1187 break;
1188 case anev_abort:
1189 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=abort");
1190 env[i] = str[i]; i++;
1191 break;
1192 case anev_reset:
1193 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=reset");
1194 env[i] = str[i]; i++;
1195 break;
1196 }
1197 env[i] = NULL;
1198 kobject_uevent_env(&card->gdev->dev.kobj, KOBJ_CHANGE, env);
1199 }
1200
1201 struct qeth_bridge_state_data {
1202 struct work_struct worker;
1203 struct qeth_card *card;
1204 u8 role;
1205 u8 state;
1206 };
1207
1208 static void qeth_bridge_state_change_worker(struct work_struct *work)
1209 {
1210 struct qeth_bridge_state_data *data =
1211 container_of(work, struct qeth_bridge_state_data, worker);
1212 char env_locrem[32];
1213 char env_role[32];
1214 char env_state[32];
1215 char *env[] = {
1216 env_locrem,
1217 env_role,
1218 env_state,
1219 NULL
1220 };
1221
1222 snprintf(env_locrem, sizeof(env_locrem), "BRIDGEPORT=statechange");
1223 snprintf(env_role, sizeof(env_role), "ROLE=%s",
1224 (data->role == QETH_SBP_ROLE_NONE) ? "none" :
1225 (data->role == QETH_SBP_ROLE_PRIMARY) ? "primary" :
1226 (data->role == QETH_SBP_ROLE_SECONDARY) ? "secondary" :
1227 "<INVALID>");
1228 snprintf(env_state, sizeof(env_state), "STATE=%s",
1229 (data->state == QETH_SBP_STATE_INACTIVE) ? "inactive" :
1230 (data->state == QETH_SBP_STATE_STANDBY) ? "standby" :
1231 (data->state == QETH_SBP_STATE_ACTIVE) ? "active" :
1232 "<INVALID>");
1233 kobject_uevent_env(&data->card->gdev->dev.kobj,
1234 KOBJ_CHANGE, env);
1235 kfree(data);
1236 }
1237
1238 static void qeth_bridge_state_change(struct qeth_card *card,
1239 struct qeth_ipa_cmd *cmd)
1240 {
1241 struct qeth_sbp_port_data *qports = &cmd->data.sbp.data.port_data;
1242 struct qeth_bridge_state_data *data;
1243
1244 QETH_CARD_TEXT(card, 2, "brstchng");
1245 if (qports->num_entries == 0) {
1246 QETH_CARD_TEXT(card, 2, "BPempty");
1247 return;
1248 }
1249 if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1250 QETH_CARD_TEXT_(card, 2, "BPsz%04x", qports->entry_length);
1251 return;
1252 }
1253
1254 data = kzalloc(sizeof(*data), GFP_ATOMIC);
1255 if (!data) {
1256 QETH_CARD_TEXT(card, 2, "BPSalloc");
1257 return;
1258 }
1259 INIT_WORK(&data->worker, qeth_bridge_state_change_worker);
1260 data->card = card;
1261 /* Information for the local port: */
1262 data->role = qports->entry[0].role;
1263 data->state = qports->entry[0].state;
1264
1265 queue_work(card->event_wq, &data->worker);
1266 }
1267
1268 struct qeth_addr_change_data {
1269 struct delayed_work dwork;
1270 struct qeth_card *card;
1271 struct qeth_ipacmd_addr_change ac_event;
1272 };
1273
1274 static void qeth_l2_dev2br_worker(struct work_struct *work)
1275 {
1276 struct delayed_work *dwork = to_delayed_work(work);
1277 struct qeth_addr_change_data *data;
1278 struct qeth_card *card;
1279 struct qeth_priv *priv;
1280 unsigned int i;
1281 int rc;
1282
1283 data = container_of(dwork, struct qeth_addr_change_data, dwork);
1284 card = data->card;
1285 priv = netdev_priv(card->dev);
1286
1287 QETH_CARD_TEXT(card, 4, "dev2brew");
1288
1289 if (READ_ONCE(card->info.pnso_mode) == QETH_PNSO_NONE)
1290 goto free;
1291
1292 /* Potential re-config in progress, try again later: */
1293 if (!rtnl_trylock()) {
1294 queue_delayed_work(card->event_wq, dwork,
1295 msecs_to_jiffies(100));
1296 return;
1297 }
1298 if (!netif_device_present(card->dev))
1299 goto out_unlock;
1300
1301 if (data->ac_event.lost_event_mask) {
1302 QETH_DBF_MESSAGE(3,
1303 "Address change notification overflow on device %x\n",
1304 CARD_DEVID(card));
1305 /* Card fdb and bridge fdb are out of sync, card has stopped
1306 * notifications (no need to drain_workqueue). Purge all
1307 * 'extern_learn' entries from the parent bridge and restart
1308 * the notifications.
1309 */
1310 qeth_l2_dev2br_fdb_flush(card);
1311 rc = qeth_l2_dev2br_an_set(card, true);
1312 if (rc) {
1313 /* TODO: if we want to retry after -EAGAIN, be
1314 * aware there could be stale entries in the
1315 * workqueue now, that need to be drained.
1316 * For now we give up:
1317 */
1318 netdev_err(card->dev,
1319 "bridge learning_sync failed to recover: %d\n",
1320 rc);
1321 WRITE_ONCE(card->info.pnso_mode,
1322 QETH_PNSO_NONE);
1323 /* To remove fdb entries reported by an_set: */
1324 qeth_l2_dev2br_fdb_flush(card);
1325 priv->brport_features ^= BR_LEARNING_SYNC;
1326 } else {
1327 QETH_DBF_MESSAGE(3,
1328 "Address Notification resynced on device %x\n",
1329 CARD_DEVID(card));
1330 }
1331 } else {
1332 for (i = 0; i < data->ac_event.num_entries; i++) {
1333 struct qeth_ipacmd_addr_change_entry *entry =
1334 &data->ac_event.entry[i];
1335 qeth_l2_dev2br_fdb_notify(card,
1336 entry->change_code,
1337 &entry->token,
1338 &entry->addr_lnid);
1339 }
1340 }
1341
1342 out_unlock:
1343 rtnl_unlock();
1344
1345 free:
1346 kfree(data);
1347 }
1348
1349 static void qeth_addr_change_event_worker(struct work_struct *work)
1350 {
1351 struct delayed_work *dwork = to_delayed_work(work);
1352 struct qeth_addr_change_data *data;
1353 struct qeth_card *card;
1354 int i;
1355
1356 data = container_of(dwork, struct qeth_addr_change_data, dwork);
1357 card = data->card;
1358
1359 QETH_CARD_TEXT(data->card, 4, "adrchgew");
1360
1361 if (READ_ONCE(card->info.pnso_mode) == QETH_PNSO_NONE)
1362 goto free;
1363
1364 if (data->ac_event.lost_event_mask) {
1365 /* Potential re-config in progress, try again later: */
1366 if (!mutex_trylock(&card->sbp_lock)) {
1367 queue_delayed_work(card->event_wq, dwork,
1368 msecs_to_jiffies(100));
1369 return;
1370 }
1371
1372 dev_info(&data->card->gdev->dev,
1373 "Address change notification stopped on %s (%s)\n",
1374 netdev_name(card->dev),
1375 (data->ac_event.lost_event_mask == 0x01)
1376 ? "Overflow"
1377 : (data->ac_event.lost_event_mask == 0x02)
1378 ? "Bridge port state change"
1379 : "Unknown reason");
1380
1381 data->card->options.sbp.hostnotification = 0;
1382 card->info.pnso_mode = QETH_PNSO_NONE;
1383 mutex_unlock(&data->card->sbp_lock);
1384 qeth_bridge_emit_host_event(data->card, anev_abort,
1385 0, NULL, NULL);
1386 } else
1387 for (i = 0; i < data->ac_event.num_entries; i++) {
1388 struct qeth_ipacmd_addr_change_entry *entry =
1389 &data->ac_event.entry[i];
1390 qeth_bridge_emit_host_event(data->card,
1391 anev_reg_unreg,
1392 entry->change_code,
1393 &entry->token,
1394 &entry->addr_lnid);
1395 }
1396
1397 free:
1398 kfree(data);
1399 }
1400
1401 static void qeth_addr_change_event(struct qeth_card *card,
1402 struct qeth_ipa_cmd *cmd)
1403 {
1404 struct qeth_ipacmd_addr_change *hostevs =
1405 &cmd->data.addrchange;
1406 struct qeth_addr_change_data *data;
1407 int extrasize;
1408
1409 if (card->info.pnso_mode == QETH_PNSO_NONE)
1410 return;
1411
1412 QETH_CARD_TEXT(card, 4, "adrchgev");
1413 if (cmd->hdr.return_code != 0x0000) {
1414 if (cmd->hdr.return_code == 0x0010) {
1415 if (hostevs->lost_event_mask == 0x00)
1416 hostevs->lost_event_mask = 0xff;
1417 } else {
1418 QETH_CARD_TEXT_(card, 2, "ACHN%04x",
1419 cmd->hdr.return_code);
1420 return;
1421 }
1422 }
1423 extrasize = sizeof(struct qeth_ipacmd_addr_change_entry) *
1424 hostevs->num_entries;
1425 data = kzalloc(sizeof(struct qeth_addr_change_data) + extrasize,
1426 GFP_ATOMIC);
1427 if (!data) {
1428 QETH_CARD_TEXT(card, 2, "ACNalloc");
1429 return;
1430 }
1431 if (card->info.pnso_mode == QETH_PNSO_BRIDGEPORT)
1432 INIT_DELAYED_WORK(&data->dwork, qeth_addr_change_event_worker);
1433 else
1434 INIT_DELAYED_WORK(&data->dwork, qeth_l2_dev2br_worker);
1435 data->card = card;
1436 memcpy(&data->ac_event, hostevs,
1437 sizeof(struct qeth_ipacmd_addr_change) + extrasize);
1438 queue_delayed_work(card->event_wq, &data->dwork, 0);
1439 }
1440
1441 /* SETBRIDGEPORT support; sending commands */
1442
1443 struct _qeth_sbp_cbctl {
1444 union {
1445 u32 supported;
1446 struct {
1447 enum qeth_sbp_roles *role;
1448 enum qeth_sbp_states *state;
1449 } qports;
1450 } data;
1451 };
1452
1453 static int qeth_bridgeport_makerc(struct qeth_card *card,
1454 struct qeth_ipa_cmd *cmd)
1455 {
1456 struct qeth_ipacmd_setbridgeport *sbp = &cmd->data.sbp;
1457 enum qeth_ipa_sbp_cmd setcmd = sbp->hdr.command_code;
1458 u16 ipa_rc = cmd->hdr.return_code;
1459 u16 sbp_rc = sbp->hdr.return_code;
1460 int rc;
1461
1462 if (ipa_rc == IPA_RC_SUCCESS && sbp_rc == IPA_RC_SUCCESS)
1463 return 0;
1464
1465 if ((IS_IQD(card) && ipa_rc == IPA_RC_SUCCESS) ||
1466 (!IS_IQD(card) && ipa_rc == sbp_rc)) {
1467 switch (sbp_rc) {
1468 case IPA_RC_SUCCESS:
1469 rc = 0;
1470 break;
1471 case IPA_RC_L2_UNSUPPORTED_CMD:
1472 case IPA_RC_UNSUPPORTED_COMMAND:
1473 rc = -EOPNOTSUPP;
1474 break;
1475 case IPA_RC_SBP_OSA_NOT_CONFIGURED:
1476 case IPA_RC_SBP_IQD_NOT_CONFIGURED:
1477 rc = -ENODEV; /* maybe not the best code here? */
1478 dev_err(&card->gdev->dev,
1479 "The device is not configured as a Bridge Port\n");
1480 break;
1481 case IPA_RC_SBP_OSA_OS_MISMATCH:
1482 case IPA_RC_SBP_IQD_OS_MISMATCH:
1483 rc = -EPERM;
1484 dev_err(&card->gdev->dev,
1485 "A Bridge Port is already configured by a different operating system\n");
1486 break;
1487 case IPA_RC_SBP_OSA_ANO_DEV_PRIMARY:
1488 case IPA_RC_SBP_IQD_ANO_DEV_PRIMARY:
1489 switch (setcmd) {
1490 case IPA_SBP_SET_PRIMARY_BRIDGE_PORT:
1491 rc = -EEXIST;
1492 dev_err(&card->gdev->dev,
1493 "The LAN already has a primary Bridge Port\n");
1494 break;
1495 case IPA_SBP_SET_SECONDARY_BRIDGE_PORT:
1496 rc = -EBUSY;
1497 dev_err(&card->gdev->dev,
1498 "The device is already a primary Bridge Port\n");
1499 break;
1500 default:
1501 rc = -EIO;
1502 }
1503 break;
1504 case IPA_RC_SBP_OSA_CURRENT_SECOND:
1505 case IPA_RC_SBP_IQD_CURRENT_SECOND:
1506 rc = -EBUSY;
1507 dev_err(&card->gdev->dev,
1508 "The device is already a secondary Bridge Port\n");
1509 break;
1510 case IPA_RC_SBP_OSA_LIMIT_SECOND:
1511 case IPA_RC_SBP_IQD_LIMIT_SECOND:
1512 rc = -EEXIST;
1513 dev_err(&card->gdev->dev,
1514 "The LAN cannot have more secondary Bridge Ports\n");
1515 break;
1516 case IPA_RC_SBP_OSA_CURRENT_PRIMARY:
1517 case IPA_RC_SBP_IQD_CURRENT_PRIMARY:
1518 rc = -EBUSY;
1519 dev_err(&card->gdev->dev,
1520 "The device is already a primary Bridge Port\n");
1521 break;
1522 case IPA_RC_SBP_OSA_NOT_AUTHD_BY_ZMAN:
1523 case IPA_RC_SBP_IQD_NOT_AUTHD_BY_ZMAN:
1524 rc = -EACCES;
1525 dev_err(&card->gdev->dev,
1526 "The device is not authorized to be a Bridge Port\n");
1527 break;
1528 default:
1529 rc = -EIO;
1530 }
1531 } else {
1532 switch (ipa_rc) {
1533 case IPA_RC_NOTSUPP:
1534 rc = -EOPNOTSUPP;
1535 break;
1536 case IPA_RC_UNSUPPORTED_COMMAND:
1537 rc = -EOPNOTSUPP;
1538 break;
1539 default:
1540 rc = -EIO;
1541 }
1542 }
1543
1544 if (rc) {
1545 QETH_CARD_TEXT_(card, 2, "SBPi%04x", ipa_rc);
1546 QETH_CARD_TEXT_(card, 2, "SBPc%04x", sbp_rc);
1547 }
1548 return rc;
1549 }
1550
1551 static struct qeth_cmd_buffer *qeth_sbp_build_cmd(struct qeth_card *card,
1552 enum qeth_ipa_sbp_cmd sbp_cmd,
1553 unsigned int data_length)
1554 {
1555 enum qeth_ipa_cmds ipa_cmd = IS_IQD(card) ? IPA_CMD_SETBRIDGEPORT_IQD :
1556 IPA_CMD_SETBRIDGEPORT_OSA;
1557 struct qeth_ipacmd_sbp_hdr *hdr;
1558 struct qeth_cmd_buffer *iob;
1559
1560 iob = qeth_ipa_alloc_cmd(card, ipa_cmd, QETH_PROT_NONE,
1561 data_length +
1562 offsetof(struct qeth_ipacmd_setbridgeport,
1563 data));
1564 if (!iob)
1565 return iob;
1566
1567 hdr = &__ipa_cmd(iob)->data.sbp.hdr;
1568 hdr->cmdlength = sizeof(*hdr) + data_length;
1569 hdr->command_code = sbp_cmd;
1570 hdr->used_total = 1;
1571 hdr->seq_no = 1;
1572 return iob;
1573 }
1574
1575 static int qeth_bridgeport_query_support_cb(struct qeth_card *card,
1576 struct qeth_reply *reply, unsigned long data)
1577 {
1578 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1579 struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1580 int rc;
1581
1582 QETH_CARD_TEXT(card, 2, "brqsupcb");
1583 rc = qeth_bridgeport_makerc(card, cmd);
1584 if (rc)
1585 return rc;
1586
1587 cbctl->data.supported =
1588 cmd->data.sbp.data.query_cmds_supp.supported_cmds;
1589 return 0;
1590 }
1591
1592 /**
1593 * qeth_bridgeport_query_support() - store bitmask of supported subfunctions.
1594 * @card: qeth_card structure pointer.
1595 *
1596 * Sets bitmask of supported setbridgeport subfunctions in the qeth_card
1597 * strucutre: card->options.sbp.supported_funcs.
1598 */
1599 static void qeth_bridgeport_query_support(struct qeth_card *card)
1600 {
1601 struct qeth_cmd_buffer *iob;
1602 struct _qeth_sbp_cbctl cbctl;
1603
1604 QETH_CARD_TEXT(card, 2, "brqsuppo");
1605 iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_COMMANDS_SUPPORTED,
1606 SBP_DATA_SIZEOF(query_cmds_supp));
1607 if (!iob)
1608 return;
1609
1610 if (qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_support_cb,
1611 &cbctl)) {
1612 card->options.sbp.role = QETH_SBP_ROLE_NONE;
1613 card->options.sbp.supported_funcs = 0;
1614 return;
1615 }
1616 card->options.sbp.supported_funcs = cbctl.data.supported;
1617 }
1618
1619 static int qeth_bridgeport_query_ports_cb(struct qeth_card *card,
1620 struct qeth_reply *reply, unsigned long data)
1621 {
1622 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1623 struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1624 struct qeth_sbp_port_data *qports;
1625 int rc;
1626
1627 QETH_CARD_TEXT(card, 2, "brqprtcb");
1628 rc = qeth_bridgeport_makerc(card, cmd);
1629 if (rc)
1630 return rc;
1631
1632 qports = &cmd->data.sbp.data.port_data;
1633 if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1634 QETH_CARD_TEXT_(card, 2, "SBPs%04x", qports->entry_length);
1635 return -EINVAL;
1636 }
1637 /* first entry contains the state of the local port */
1638 if (qports->num_entries > 0) {
1639 if (cbctl->data.qports.role)
1640 *cbctl->data.qports.role = qports->entry[0].role;
1641 if (cbctl->data.qports.state)
1642 *cbctl->data.qports.state = qports->entry[0].state;
1643 }
1644 return 0;
1645 }
1646
1647 /**
1648 * qeth_bridgeport_query_ports() - query local bridgeport status.
1649 * @card: qeth_card structure pointer.
1650 * @role: Role of the port: 0-none, 1-primary, 2-secondary.
1651 * @state: State of the port: 0-inactive, 1-standby, 2-active.
1652 *
1653 * Returns negative errno-compatible error indication or 0 on success.
1654 *
1655 * 'role' and 'state' are not updated in case of hardware operation failure.
1656 */
1657 int qeth_bridgeport_query_ports(struct qeth_card *card,
1658 enum qeth_sbp_roles *role, enum qeth_sbp_states *state)
1659 {
1660 struct qeth_cmd_buffer *iob;
1661 struct _qeth_sbp_cbctl cbctl = {
1662 .data = {
1663 .qports = {
1664 .role = role,
1665 .state = state,
1666 },
1667 },
1668 };
1669
1670 QETH_CARD_TEXT(card, 2, "brqports");
1671 if (!(card->options.sbp.supported_funcs & IPA_SBP_QUERY_BRIDGE_PORTS))
1672 return -EOPNOTSUPP;
1673 iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_BRIDGE_PORTS, 0);
1674 if (!iob)
1675 return -ENOMEM;
1676
1677 return qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_ports_cb,
1678 &cbctl);
1679 }
1680
1681 static int qeth_bridgeport_set_cb(struct qeth_card *card,
1682 struct qeth_reply *reply, unsigned long data)
1683 {
1684 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
1685
1686 QETH_CARD_TEXT(card, 2, "brsetrcb");
1687 return qeth_bridgeport_makerc(card, cmd);
1688 }
1689
1690 /**
1691 * qeth_bridgeport_setrole() - Assign primary role to the port.
1692 * @card: qeth_card structure pointer.
1693 * @role: Role to assign.
1694 *
1695 * Returns negative errno-compatible error indication or 0 on success.
1696 */
1697 int qeth_bridgeport_setrole(struct qeth_card *card, enum qeth_sbp_roles role)
1698 {
1699 struct qeth_cmd_buffer *iob;
1700 enum qeth_ipa_sbp_cmd setcmd;
1701 unsigned int cmdlength = 0;
1702
1703 QETH_CARD_TEXT(card, 2, "brsetrol");
1704 switch (role) {
1705 case QETH_SBP_ROLE_NONE:
1706 setcmd = IPA_SBP_RESET_BRIDGE_PORT_ROLE;
1707 break;
1708 case QETH_SBP_ROLE_PRIMARY:
1709 setcmd = IPA_SBP_SET_PRIMARY_BRIDGE_PORT;
1710 cmdlength = SBP_DATA_SIZEOF(set_primary);
1711 break;
1712 case QETH_SBP_ROLE_SECONDARY:
1713 setcmd = IPA_SBP_SET_SECONDARY_BRIDGE_PORT;
1714 break;
1715 default:
1716 return -EINVAL;
1717 }
1718 if (!(card->options.sbp.supported_funcs & setcmd))
1719 return -EOPNOTSUPP;
1720 iob = qeth_sbp_build_cmd(card, setcmd, cmdlength);
1721 if (!iob)
1722 return -ENOMEM;
1723
1724 return qeth_send_ipa_cmd(card, iob, qeth_bridgeport_set_cb, NULL);
1725 }
1726
1727 static void qeth_bridgeport_an_set_cb(void *priv,
1728 struct chsc_pnso_naid_l2 *entry)
1729 {
1730 struct qeth_card *card = (struct qeth_card *)priv;
1731 u8 code;
1732
1733 code = IPA_ADDR_CHANGE_CODE_MACADDR;
1734 if (entry->addr_lnid.lnid < VLAN_N_VID)
1735 code |= IPA_ADDR_CHANGE_CODE_VLANID;
1736 qeth_bridge_emit_host_event(card, anev_reg_unreg, code,
1737 (struct net_if_token *)&entry->nit,
1738 (struct mac_addr_lnid *)&entry->addr_lnid);
1739 }
1740
1741 /**
1742 * qeth_bridgeport_an_set() - Enable or disable bridgeport address notification
1743 * @card: qeth_card structure pointer.
1744 * @enable: 0 - disable, non-zero - enable notifications
1745 *
1746 * Returns negative errno-compatible error indication or 0 on success.
1747 *
1748 * On enable, emits a series of address notifications udev events for all
1749 * currently registered hosts.
1750 */
1751 int qeth_bridgeport_an_set(struct qeth_card *card, int enable)
1752 {
1753 int rc;
1754
1755 if (!card->options.sbp.supported_funcs)
1756 return -EOPNOTSUPP;
1757
1758 if (enable) {
1759 qeth_bridge_emit_host_event(card, anev_reset, 0, NULL, NULL);
1760 qeth_l2_set_pnso_mode(card, QETH_PNSO_BRIDGEPORT);
1761 rc = qeth_l2_pnso(card, PNSO_OC_NET_BRIDGE_INFO, 1,
1762 qeth_bridgeport_an_set_cb, card);
1763 if (rc)
1764 qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
1765 } else {
1766 rc = qeth_l2_pnso(card, PNSO_OC_NET_BRIDGE_INFO, 0, NULL, NULL);
1767 qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
1768 }
1769 return rc;
1770 }
1771
1772 /* VNIC Characteristics support */
1773
1774 /* handle VNICC IPA command return codes; convert to error codes */
1775 static int qeth_l2_vnicc_makerc(struct qeth_card *card, u16 ipa_rc)
1776 {
1777 int rc;
1778
1779 switch (ipa_rc) {
1780 case IPA_RC_SUCCESS:
1781 return ipa_rc;
1782 case IPA_RC_L2_UNSUPPORTED_CMD:
1783 case IPA_RC_NOTSUPP:
1784 rc = -EOPNOTSUPP;
1785 break;
1786 case IPA_RC_VNICC_OOSEQ:
1787 rc = -EALREADY;
1788 break;
1789 case IPA_RC_VNICC_VNICBP:
1790 rc = -EBUSY;
1791 break;
1792 case IPA_RC_L2_ADDR_TABLE_FULL:
1793 rc = -ENOSPC;
1794 break;
1795 case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
1796 rc = -EACCES;
1797 break;
1798 default:
1799 rc = -EIO;
1800 }
1801
1802 QETH_CARD_TEXT_(card, 2, "err%04x", ipa_rc);
1803 return rc;
1804 }
1805
1806 /* generic VNICC request call back */
1807 static int qeth_l2_vnicc_request_cb(struct qeth_card *card,
1808 struct qeth_reply *reply,
1809 unsigned long data)
1810 {
1811 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1812 struct qeth_ipacmd_vnicc *rep = &cmd->data.vnicc;
1813 u32 sub_cmd = cmd->data.vnicc.hdr.sub_command;
1814
1815 QETH_CARD_TEXT(card, 2, "vniccrcb");
1816 if (cmd->hdr.return_code)
1817 return qeth_l2_vnicc_makerc(card, cmd->hdr.return_code);
1818 /* return results to caller */
1819 card->options.vnicc.sup_chars = rep->vnicc_cmds.supported;
1820 card->options.vnicc.cur_chars = rep->vnicc_cmds.enabled;
1821
1822 if (sub_cmd == IPA_VNICC_QUERY_CMDS)
1823 *(u32 *)reply->param = rep->data.query_cmds.sup_cmds;
1824 else if (sub_cmd == IPA_VNICC_GET_TIMEOUT)
1825 *(u32 *)reply->param = rep->data.getset_timeout.timeout;
1826
1827 return 0;
1828 }
1829
1830 static struct qeth_cmd_buffer *qeth_l2_vnicc_build_cmd(struct qeth_card *card,
1831 u32 vnicc_cmd,
1832 unsigned int data_length)
1833 {
1834 struct qeth_ipacmd_vnicc_hdr *hdr;
1835 struct qeth_cmd_buffer *iob;
1836
1837 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_VNICC, QETH_PROT_NONE,
1838 data_length +
1839 offsetof(struct qeth_ipacmd_vnicc, data));
1840 if (!iob)
1841 return NULL;
1842
1843 hdr = &__ipa_cmd(iob)->data.vnicc.hdr;
1844 hdr->data_length = sizeof(*hdr) + data_length;
1845 hdr->sub_command = vnicc_cmd;
1846 return iob;
1847 }
1848
1849 /* VNICC query VNIC characteristics request */
1850 static int qeth_l2_vnicc_query_chars(struct qeth_card *card)
1851 {
1852 struct qeth_cmd_buffer *iob;
1853
1854 QETH_CARD_TEXT(card, 2, "vniccqch");
1855 iob = qeth_l2_vnicc_build_cmd(card, IPA_VNICC_QUERY_CHARS, 0);
1856 if (!iob)
1857 return -ENOMEM;
1858
1859 return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, NULL);
1860 }
1861
1862 /* VNICC query sub commands request */
1863 static int qeth_l2_vnicc_query_cmds(struct qeth_card *card, u32 vnic_char,
1864 u32 *sup_cmds)
1865 {
1866 struct qeth_cmd_buffer *iob;
1867
1868 QETH_CARD_TEXT(card, 2, "vniccqcm");
1869 iob = qeth_l2_vnicc_build_cmd(card, IPA_VNICC_QUERY_CMDS,
1870 VNICC_DATA_SIZEOF(query_cmds));
1871 if (!iob)
1872 return -ENOMEM;
1873
1874 __ipa_cmd(iob)->data.vnicc.data.query_cmds.vnic_char = vnic_char;
1875
1876 return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, sup_cmds);
1877 }
1878
1879 /* VNICC enable/disable characteristic request */
1880 static int qeth_l2_vnicc_set_char(struct qeth_card *card, u32 vnic_char,
1881 u32 cmd)
1882 {
1883 struct qeth_cmd_buffer *iob;
1884
1885 QETH_CARD_TEXT(card, 2, "vniccedc");
1886 iob = qeth_l2_vnicc_build_cmd(card, cmd, VNICC_DATA_SIZEOF(set_char));
1887 if (!iob)
1888 return -ENOMEM;
1889
1890 __ipa_cmd(iob)->data.vnicc.data.set_char.vnic_char = vnic_char;
1891
1892 return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, NULL);
1893 }
1894
1895 /* VNICC get/set timeout for characteristic request */
1896 static int qeth_l2_vnicc_getset_timeout(struct qeth_card *card, u32 vnicc,
1897 u32 cmd, u32 *timeout)
1898 {
1899 struct qeth_vnicc_getset_timeout *getset_timeout;
1900 struct qeth_cmd_buffer *iob;
1901
1902 QETH_CARD_TEXT(card, 2, "vniccgst");
1903 iob = qeth_l2_vnicc_build_cmd(card, cmd,
1904 VNICC_DATA_SIZEOF(getset_timeout));
1905 if (!iob)
1906 return -ENOMEM;
1907
1908 getset_timeout = &__ipa_cmd(iob)->data.vnicc.data.getset_timeout;
1909 getset_timeout->vnic_char = vnicc;
1910
1911 if (cmd == IPA_VNICC_SET_TIMEOUT)
1912 getset_timeout->timeout = *timeout;
1913
1914 return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, timeout);
1915 }
1916
1917 /* recover user timeout setting */
1918 static bool qeth_l2_vnicc_recover_timeout(struct qeth_card *card, u32 vnicc,
1919 u32 *timeout)
1920 {
1921 if (card->options.vnicc.sup_chars & vnicc &&
1922 card->options.vnicc.getset_timeout_sup & vnicc &&
1923 !qeth_l2_vnicc_getset_timeout(card, vnicc, IPA_VNICC_SET_TIMEOUT,
1924 timeout))
1925 return false;
1926 *timeout = QETH_VNICC_DEFAULT_TIMEOUT;
1927 return true;
1928 }
1929
1930 /* set current VNICC flag state; called from sysfs store function */
1931 int qeth_l2_vnicc_set_state(struct qeth_card *card, u32 vnicc, bool state)
1932 {
1933 int rc = 0;
1934 u32 cmd;
1935
1936 QETH_CARD_TEXT(card, 2, "vniccsch");
1937
1938 /* check if characteristic and enable/disable are supported */
1939 if (!(card->options.vnicc.sup_chars & vnicc) ||
1940 !(card->options.vnicc.set_char_sup & vnicc))
1941 return -EOPNOTSUPP;
1942
1943 if (qeth_bridgeport_is_in_use(card))
1944 return -EBUSY;
1945
1946 /* set enable/disable command and store wanted characteristic */
1947 if (state) {
1948 cmd = IPA_VNICC_ENABLE;
1949 card->options.vnicc.wanted_chars |= vnicc;
1950 } else {
1951 cmd = IPA_VNICC_DISABLE;
1952 card->options.vnicc.wanted_chars &= ~vnicc;
1953 }
1954
1955 /* do we need to do anything? */
1956 if (card->options.vnicc.cur_chars == card->options.vnicc.wanted_chars)
1957 return rc;
1958
1959 /* if card is not ready, simply stop here */
1960 if (!qeth_card_hw_is_reachable(card)) {
1961 if (state)
1962 card->options.vnicc.cur_chars |= vnicc;
1963 else
1964 card->options.vnicc.cur_chars &= ~vnicc;
1965 return rc;
1966 }
1967
1968 rc = qeth_l2_vnicc_set_char(card, vnicc, cmd);
1969 if (rc)
1970 card->options.vnicc.wanted_chars =
1971 card->options.vnicc.cur_chars;
1972 else {
1973 /* successful online VNICC change; handle special cases */
1974 if (state && vnicc == QETH_VNICC_RX_BCAST)
1975 card->options.vnicc.rx_bcast_enabled = true;
1976 if (!state && vnicc == QETH_VNICC_LEARNING)
1977 qeth_l2_vnicc_recover_timeout(card, vnicc,
1978 &card->options.vnicc.learning_timeout);
1979 }
1980
1981 return rc;
1982 }
1983
1984 /* get current VNICC flag state; called from sysfs show function */
1985 int qeth_l2_vnicc_get_state(struct qeth_card *card, u32 vnicc, bool *state)
1986 {
1987 int rc = 0;
1988
1989 QETH_CARD_TEXT(card, 2, "vniccgch");
1990
1991 /* check if characteristic is supported */
1992 if (!(card->options.vnicc.sup_chars & vnicc))
1993 return -EOPNOTSUPP;
1994
1995 if (qeth_bridgeport_is_in_use(card))
1996 return -EBUSY;
1997
1998 /* if card is ready, query current VNICC state */
1999 if (qeth_card_hw_is_reachable(card))
2000 rc = qeth_l2_vnicc_query_chars(card);
2001
2002 *state = (card->options.vnicc.cur_chars & vnicc) ? true : false;
2003 return rc;
2004 }
2005
2006 /* set VNICC timeout; called from sysfs store function. Currently, only learning
2007 * supports timeout
2008 */
2009 int qeth_l2_vnicc_set_timeout(struct qeth_card *card, u32 timeout)
2010 {
2011 int rc = 0;
2012
2013 QETH_CARD_TEXT(card, 2, "vniccsto");
2014
2015 /* check if characteristic and set_timeout are supported */
2016 if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
2017 !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
2018 return -EOPNOTSUPP;
2019
2020 if (qeth_bridgeport_is_in_use(card))
2021 return -EBUSY;
2022
2023 /* do we need to do anything? */
2024 if (card->options.vnicc.learning_timeout == timeout)
2025 return rc;
2026
2027 /* if card is not ready, simply store the value internally and return */
2028 if (!qeth_card_hw_is_reachable(card)) {
2029 card->options.vnicc.learning_timeout = timeout;
2030 return rc;
2031 }
2032
2033 /* send timeout value to card; if successful, store value internally */
2034 rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
2035 IPA_VNICC_SET_TIMEOUT, &timeout);
2036 if (!rc)
2037 card->options.vnicc.learning_timeout = timeout;
2038
2039 return rc;
2040 }
2041
2042 /* get current VNICC timeout; called from sysfs show function. Currently, only
2043 * learning supports timeout
2044 */
2045 int qeth_l2_vnicc_get_timeout(struct qeth_card *card, u32 *timeout)
2046 {
2047 int rc = 0;
2048
2049 QETH_CARD_TEXT(card, 2, "vniccgto");
2050
2051 /* check if characteristic and get_timeout are supported */
2052 if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
2053 !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
2054 return -EOPNOTSUPP;
2055
2056 if (qeth_bridgeport_is_in_use(card))
2057 return -EBUSY;
2058
2059 /* if card is ready, get timeout. Otherwise, just return stored value */
2060 *timeout = card->options.vnicc.learning_timeout;
2061 if (qeth_card_hw_is_reachable(card))
2062 rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
2063 IPA_VNICC_GET_TIMEOUT,
2064 timeout);
2065
2066 return rc;
2067 }
2068
2069 /* check if VNICC is currently enabled */
2070 static bool _qeth_l2_vnicc_is_in_use(struct qeth_card *card)
2071 {
2072 if (!card->options.vnicc.sup_chars)
2073 return false;
2074 /* default values are only OK if rx_bcast was not enabled by user
2075 * or the card is offline.
2076 */
2077 if (card->options.vnicc.cur_chars == QETH_VNICC_DEFAULT) {
2078 if (!card->options.vnicc.rx_bcast_enabled ||
2079 !qeth_card_hw_is_reachable(card))
2080 return false;
2081 }
2082 return true;
2083 }
2084
2085 /**
2086 * qeth_bridgeport_allowed - are any qeth_bridgeport functions allowed?
2087 * @card: qeth_card structure pointer
2088 *
2089 * qeth_bridgeport functionality is mutually exclusive with usage of the
2090 * VNIC Characteristics and dev2br address notifications
2091 */
2092 bool qeth_bridgeport_allowed(struct qeth_card *card)
2093 {
2094 struct qeth_priv *priv = netdev_priv(card->dev);
2095
2096 return (!_qeth_l2_vnicc_is_in_use(card) &&
2097 !(priv->brport_features & BR_LEARNING_SYNC));
2098 }
2099
2100 /* recover user characteristic setting */
2101 static bool qeth_l2_vnicc_recover_char(struct qeth_card *card, u32 vnicc,
2102 bool enable)
2103 {
2104 u32 cmd = enable ? IPA_VNICC_ENABLE : IPA_VNICC_DISABLE;
2105
2106 if (card->options.vnicc.sup_chars & vnicc &&
2107 card->options.vnicc.set_char_sup & vnicc &&
2108 !qeth_l2_vnicc_set_char(card, vnicc, cmd))
2109 return false;
2110 card->options.vnicc.wanted_chars &= ~vnicc;
2111 card->options.vnicc.wanted_chars |= QETH_VNICC_DEFAULT & vnicc;
2112 return true;
2113 }
2114
2115 /* (re-)initialize VNICC */
2116 static void qeth_l2_vnicc_init(struct qeth_card *card)
2117 {
2118 u32 *timeout = &card->options.vnicc.learning_timeout;
2119 bool enable, error = false;
2120 unsigned int chars_len, i;
2121 unsigned long chars_tmp;
2122 u32 sup_cmds, vnicc;
2123
2124 QETH_CARD_TEXT(card, 2, "vniccini");
2125 /* reset rx_bcast */
2126 card->options.vnicc.rx_bcast_enabled = 0;
2127 /* initial query and storage of VNIC characteristics */
2128 if (qeth_l2_vnicc_query_chars(card)) {
2129 if (card->options.vnicc.wanted_chars != QETH_VNICC_DEFAULT ||
2130 *timeout != QETH_VNICC_DEFAULT_TIMEOUT)
2131 dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
2132 /* fail quietly if user didn't change the default config */
2133 card->options.vnicc.sup_chars = 0;
2134 card->options.vnicc.cur_chars = 0;
2135 card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
2136 return;
2137 }
2138 /* get supported commands for each supported characteristic */
2139 chars_tmp = card->options.vnicc.sup_chars;
2140 chars_len = sizeof(card->options.vnicc.sup_chars) * BITS_PER_BYTE;
2141 for_each_set_bit(i, &chars_tmp, chars_len) {
2142 vnicc = BIT(i);
2143 if (qeth_l2_vnicc_query_cmds(card, vnicc, &sup_cmds)) {
2144 sup_cmds = 0;
2145 error = true;
2146 }
2147 if ((sup_cmds & IPA_VNICC_SET_TIMEOUT) &&
2148 (sup_cmds & IPA_VNICC_GET_TIMEOUT))
2149 card->options.vnicc.getset_timeout_sup |= vnicc;
2150 else
2151 card->options.vnicc.getset_timeout_sup &= ~vnicc;
2152 if ((sup_cmds & IPA_VNICC_ENABLE) &&
2153 (sup_cmds & IPA_VNICC_DISABLE))
2154 card->options.vnicc.set_char_sup |= vnicc;
2155 else
2156 card->options.vnicc.set_char_sup &= ~vnicc;
2157 }
2158 /* enforce assumed default values and recover settings, if changed */
2159 error |= qeth_l2_vnicc_recover_timeout(card, QETH_VNICC_LEARNING,
2160 timeout);
2161 /* Change chars, if necessary */
2162 chars_tmp = card->options.vnicc.wanted_chars ^
2163 card->options.vnicc.cur_chars;
2164 chars_len = sizeof(card->options.vnicc.wanted_chars) * BITS_PER_BYTE;
2165 for_each_set_bit(i, &chars_tmp, chars_len) {
2166 vnicc = BIT(i);
2167 enable = card->options.vnicc.wanted_chars & vnicc;
2168 error |= qeth_l2_vnicc_recover_char(card, vnicc, enable);
2169 }
2170 if (error)
2171 dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
2172 }
2173
2174 /* configure default values of VNIC characteristics */
2175 static void qeth_l2_vnicc_set_defaults(struct qeth_card *card)
2176 {
2177 /* characteristics values */
2178 card->options.vnicc.sup_chars = QETH_VNICC_ALL;
2179 card->options.vnicc.cur_chars = QETH_VNICC_DEFAULT;
2180 card->options.vnicc.learning_timeout = QETH_VNICC_DEFAULT_TIMEOUT;
2181 /* supported commands */
2182 card->options.vnicc.set_char_sup = QETH_VNICC_ALL;
2183 card->options.vnicc.getset_timeout_sup = QETH_VNICC_LEARNING;
2184 /* settings wanted by users */
2185 card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
2186 }
2187
2188 static const struct device_type qeth_l2_devtype = {
2189 .name = "qeth_layer2",
2190 .groups = qeth_l2_attr_groups,
2191 };
2192
2193 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
2194 {
2195 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
2196 int rc;
2197
2198 if (IS_OSN(card))
2199 dev_notice(&gdev->dev, "OSN support will be dropped in 2021\n");
2200
2201 qeth_l2_vnicc_set_defaults(card);
2202 mutex_init(&card->sbp_lock);
2203
2204 if (gdev->dev.type == &qeth_generic_devtype) {
2205 rc = qeth_l2_create_device_attributes(&gdev->dev);
2206 if (rc)
2207 return rc;
2208 }
2209
2210 INIT_WORK(&card->rx_mode_work, qeth_l2_rx_mode_work);
2211 return 0;
2212 }
2213
2214 static void qeth_l2_remove_device(struct ccwgroup_device *gdev)
2215 {
2216 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
2217
2218 if (gdev->dev.type == &qeth_generic_devtype)
2219 qeth_l2_remove_device_attributes(&gdev->dev);
2220 qeth_set_allowed_threads(card, 0, 1);
2221 wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
2222
2223 if (gdev->state == CCWGROUP_ONLINE)
2224 qeth_set_offline(card, false);
2225
2226 cancel_work_sync(&card->close_dev_work);
2227 if (card->dev->reg_state == NETREG_REGISTERED)
2228 unregister_netdev(card->dev);
2229 }
2230
2231 static int qeth_l2_set_online(struct qeth_card *card, bool carrier_ok)
2232 {
2233 struct net_device *dev = card->dev;
2234 int rc = 0;
2235
2236 /* query before bridgeport_notification may be enabled */
2237 qeth_l2_detect_dev2br_support(card);
2238
2239 mutex_lock(&card->sbp_lock);
2240 qeth_bridgeport_query_support(card);
2241 if (card->options.sbp.supported_funcs) {
2242 qeth_l2_setup_bridgeport_attrs(card);
2243 dev_info(&card->gdev->dev,
2244 "The device represents a Bridge Capable Port\n");
2245 }
2246 mutex_unlock(&card->sbp_lock);
2247
2248 qeth_l2_register_dev_addr(card);
2249
2250 /* for the rx_bcast characteristic, init VNICC after setmac */
2251 qeth_l2_vnicc_init(card);
2252
2253 qeth_l2_trace_features(card);
2254
2255 /* softsetup */
2256 QETH_CARD_TEXT(card, 2, "softsetp");
2257
2258 card->state = CARD_STATE_SOFTSETUP;
2259
2260 qeth_set_allowed_threads(card, 0xffffffff, 0);
2261
2262 if (dev->reg_state != NETREG_REGISTERED) {
2263 rc = qeth_l2_setup_netdev(card);
2264 if (rc)
2265 goto err_setup;
2266
2267 if (carrier_ok)
2268 netif_carrier_on(dev);
2269 } else {
2270 rtnl_lock();
2271 rc = qeth_set_real_num_tx_queues(card,
2272 qeth_tx_actual_queues(card));
2273 if (rc) {
2274 rtnl_unlock();
2275 goto err_set_queues;
2276 }
2277
2278 if (carrier_ok)
2279 netif_carrier_on(dev);
2280 else
2281 netif_carrier_off(dev);
2282
2283 netif_device_attach(dev);
2284 qeth_enable_hw_features(dev);
2285 qeth_l2_enable_brport_features(card);
2286
2287 if (card->info.open_when_online) {
2288 card->info.open_when_online = 0;
2289 dev_open(dev, NULL);
2290 }
2291 rtnl_unlock();
2292 }
2293 return 0;
2294
2295 err_set_queues:
2296 err_setup:
2297 qeth_set_allowed_threads(card, 0, 1);
2298 card->state = CARD_STATE_DOWN;
2299 return rc;
2300 }
2301
2302 static void qeth_l2_set_offline(struct qeth_card *card)
2303 {
2304 struct qeth_priv *priv = netdev_priv(card->dev);
2305
2306 qeth_set_allowed_threads(card, 0, 1);
2307 qeth_l2_drain_rx_mode_cache(card);
2308
2309 if (card->state == CARD_STATE_SOFTSETUP)
2310 card->state = CARD_STATE_DOWN;
2311
2312 qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
2313 if (priv->brport_features & BR_LEARNING_SYNC) {
2314 rtnl_lock();
2315 qeth_l2_dev2br_fdb_flush(card);
2316 rtnl_unlock();
2317 }
2318 }
2319
2320 /* Returns zero if the command is successfully "consumed" */
2321 static int qeth_l2_control_event(struct qeth_card *card,
2322 struct qeth_ipa_cmd *cmd)
2323 {
2324 switch (cmd->hdr.command) {
2325 case IPA_CMD_SETBRIDGEPORT_OSA:
2326 case IPA_CMD_SETBRIDGEPORT_IQD:
2327 if (cmd->data.sbp.hdr.command_code ==
2328 IPA_SBP_BRIDGE_PORT_STATE_CHANGE) {
2329 qeth_bridge_state_change(card, cmd);
2330 return 0;
2331 }
2332
2333 return 1;
2334 case IPA_CMD_ADDRESS_CHANGE_NOTIF:
2335 qeth_addr_change_event(card, cmd);
2336 return 0;
2337 default:
2338 return 1;
2339 }
2340 }
2341
2342 const struct qeth_discipline qeth_l2_discipline = {
2343 .devtype = &qeth_l2_devtype,
2344 .setup = qeth_l2_probe_device,
2345 .remove = qeth_l2_remove_device,
2346 .set_online = qeth_l2_set_online,
2347 .set_offline = qeth_l2_set_offline,
2348 .do_ioctl = NULL,
2349 .control_event_handler = qeth_l2_control_event,
2350 };
2351 EXPORT_SYMBOL_GPL(qeth_l2_discipline);
2352
2353 static int __init qeth_l2_init(void)
2354 {
2355 pr_info("register layer 2 discipline\n");
2356 return 0;
2357 }
2358
2359 static void __exit qeth_l2_exit(void)
2360 {
2361 pr_info("unregister layer 2 discipline\n");
2362 }
2363
2364 module_init(qeth_l2_init);
2365 module_exit(qeth_l2_exit);
2366 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
2367 MODULE_DESCRIPTION("qeth layer 2 discipline");
2368 MODULE_LICENSE("GPL");
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