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,__u8 * mac,enum qeth_ipa_cmds ipacmd)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
qeth_l2_send_setmac(struct qeth_card * card,__u8 * mac)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
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 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
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 on device %u: %d\n",
142 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,int ipv,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 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
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 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
qeth_l2_register_dev_addr(struct qeth_card * card)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
qeth_l2_validate_addr(struct net_device * dev)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
qeth_l2_set_mac_address(struct net_device * dev,void * p)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
qeth_l2_promisc_to_bridge(struct qeth_card * card,bool enable)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
qeth_l2_set_promisc_mode(struct qeth_card * card)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 */
qeth_l2_add_mac(struct qeth_card * card,struct netdev_hw_addr * ha)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
qeth_l2_rx_mode_work(struct work_struct * work)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
qeth_l2_xmit_osn(struct qeth_card * card,struct sk_buff * skb,struct qeth_qdio_out_q * queue)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
qeth_l2_hard_start_xmit(struct sk_buff * skb,struct net_device * dev)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
qeth_l2_select_queue(struct net_device * dev,struct sk_buff * skb,struct net_device * sb_dev)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
qeth_l2_set_rx_mode(struct net_device * dev)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 */
qeth_l2_pnso(struct qeth_card * card,u8 oc,int cnc,void (* cb)(void * priv,struct chsc_pnso_naid_l2 * entry),void * priv)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
qeth_is_my_net_if_token(struct qeth_card * card,struct net_if_token * token)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 */
qeth_l2_dev2br_fdb_notify(struct qeth_card * card,u8 code,struct net_if_token * token,struct mac_addr_lnid * addr_lnid)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
qeth_l2_dev2br_an_set_cb(void * priv,struct chsc_pnso_naid_l2 * entry)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 */
qeth_l2_dev2br_an_set(struct qeth_card * card,bool enable)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
qeth_l2_bridge_getlink(struct sk_buff * skb,u32 pid,u32 seq,struct net_device * dev,u32 filter_mask,int nlflags)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 */
qeth_l2_bridge_setlink(struct net_device * dev,struct nlmsghdr * nlh,u16 flags,struct netlink_ext_ack * extack)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
qeth_l2_setup_netdev(struct qeth_card * card)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
qeth_l2_trace_features(struct qeth_card * card)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
qeth_l2_setup_bridgeport_attrs(struct qeth_card * card)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 */
qeth_l2_detect_dev2br_support(struct qeth_card * card)989 static void qeth_l2_detect_dev2br_support(struct qeth_card *card)
990 {
991 struct qeth_priv *priv = netdev_priv(card->dev);
992 bool dev2br_supported;
993
994 QETH_CARD_TEXT(card, 2, "d2brsup");
995 if (!IS_IQD(card))
996 return;
997
998 /* dev2br requires valid cssid,iid,chid */
999 dev2br_supported = card->info.ids_valid &&
1000 css_general_characteristics.enarf;
1001 QETH_CARD_TEXT_(card, 2, "D2Bsup%02x", dev2br_supported);
1002
1003 if (dev2br_supported)
1004 priv->brport_hw_features |= BR_LEARNING_SYNC;
1005 else
1006 priv->brport_hw_features &= ~BR_LEARNING_SYNC;
1007 }
1008
qeth_l2_enable_brport_features(struct qeth_card * card)1009 static void qeth_l2_enable_brport_features(struct qeth_card *card)
1010 {
1011 struct qeth_priv *priv = netdev_priv(card->dev);
1012 int rc;
1013
1014 if (priv->brport_features & BR_LEARNING_SYNC) {
1015 if (priv->brport_hw_features & BR_LEARNING_SYNC) {
1016 qeth_l2_set_pnso_mode(card, QETH_PNSO_ADDR_INFO);
1017 rc = qeth_l2_dev2br_an_set(card, true);
1018 if (rc == -EAGAIN) {
1019 /* Recoverable error, retry once */
1020 qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
1021 qeth_l2_dev2br_fdb_flush(card);
1022 qeth_l2_set_pnso_mode(card, QETH_PNSO_ADDR_INFO);
1023 rc = qeth_l2_dev2br_an_set(card, true);
1024 }
1025 if (rc) {
1026 netdev_err(card->dev,
1027 "failed to enable bridge learning_sync: %d\n",
1028 rc);
1029 qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
1030 qeth_l2_dev2br_fdb_flush(card);
1031 priv->brport_features ^= BR_LEARNING_SYNC;
1032 }
1033 } else {
1034 dev_warn(&card->gdev->dev,
1035 "bridge learning_sync not supported\n");
1036 priv->brport_features ^= BR_LEARNING_SYNC;
1037 }
1038 }
1039 }
1040
1041 #ifdef CONFIG_QETH_OSN
qeth_osn_assist_cb(struct qeth_card * card,struct qeth_cmd_buffer * iob,unsigned int data_length)1042 static void qeth_osn_assist_cb(struct qeth_card *card,
1043 struct qeth_cmd_buffer *iob,
1044 unsigned int data_length)
1045 {
1046 qeth_notify_cmd(iob, 0);
1047 qeth_put_cmd(iob);
1048 }
1049
qeth_osn_assist(struct net_device * dev,void * data,int data_len)1050 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1051 {
1052 struct qeth_cmd_buffer *iob;
1053 struct qeth_card *card;
1054
1055 if (data_len < 0)
1056 return -EINVAL;
1057 if (!dev)
1058 return -ENODEV;
1059 card = dev->ml_priv;
1060 if (!card)
1061 return -ENODEV;
1062 QETH_CARD_TEXT(card, 2, "osnsdmc");
1063 if (!qeth_card_hw_is_reachable(card))
1064 return -ENODEV;
1065
1066 iob = qeth_alloc_cmd(&card->write, IPA_PDU_HEADER_SIZE + data_len, 1,
1067 QETH_IPA_TIMEOUT);
1068 if (!iob)
1069 return -ENOMEM;
1070
1071 qeth_prepare_ipa_cmd(card, iob, (u16) data_len, NULL);
1072
1073 memcpy(__ipa_cmd(iob), data, data_len);
1074 iob->callback = qeth_osn_assist_cb;
1075 return qeth_send_ipa_cmd(card, iob, NULL, NULL);
1076 }
1077 EXPORT_SYMBOL(qeth_osn_assist);
1078
qeth_osn_register(unsigned char * read_dev_no,struct net_device ** dev,int (* assist_cb)(struct net_device *,void *),int (* data_cb)(struct sk_buff *))1079 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1080 int (*assist_cb)(struct net_device *, void *),
1081 int (*data_cb)(struct sk_buff *))
1082 {
1083 struct qeth_card *card;
1084 char bus_id[16];
1085 u16 devno;
1086
1087 memcpy(&devno, read_dev_no, 2);
1088 sprintf(bus_id, "0.0.%04x", devno);
1089 card = qeth_get_card_by_busid(bus_id);
1090 if (!card || !IS_OSN(card))
1091 return -ENODEV;
1092 *dev = card->dev;
1093
1094 QETH_CARD_TEXT(card, 2, "osnreg");
1095 if ((assist_cb == NULL) || (data_cb == NULL))
1096 return -EINVAL;
1097 card->osn_info.assist_cb = assist_cb;
1098 card->osn_info.data_cb = data_cb;
1099 return 0;
1100 }
1101 EXPORT_SYMBOL(qeth_osn_register);
1102
qeth_osn_deregister(struct net_device * dev)1103 void qeth_osn_deregister(struct net_device *dev)
1104 {
1105 struct qeth_card *card;
1106
1107 if (!dev)
1108 return;
1109 card = dev->ml_priv;
1110 if (!card)
1111 return;
1112 QETH_CARD_TEXT(card, 2, "osndereg");
1113 card->osn_info.assist_cb = NULL;
1114 card->osn_info.data_cb = NULL;
1115 }
1116 EXPORT_SYMBOL(qeth_osn_deregister);
1117 #endif
1118
1119 /* SETBRIDGEPORT support, async notifications */
1120
1121 enum qeth_an_event_type {anev_reg_unreg, anev_abort, anev_reset};
1122
1123 /**
1124 * qeth_bridge_emit_host_event() - bridgeport address change notification
1125 * @card: qeth_card structure pointer, for udev events.
1126 * @evtype: "normal" register/unregister, or abort, or reset. For abort
1127 * and reset token and addr_lnid are unused and may be NULL.
1128 * @code: event bitmask: high order bit 0x80 value 1 means removal of an
1129 * object, 0 - addition of an object.
1130 * 0x01 - VLAN, 0x02 - MAC, 0x03 - VLAN and MAC.
1131 * @token: "network token" structure identifying physical address of the port.
1132 * @addr_lnid: pointer to structure with MAC address and VLAN ID.
1133 *
1134 * This function is called when registrations and deregistrations are
1135 * reported by the hardware, and also when notifications are enabled -
1136 * for all currently registered addresses.
1137 */
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)1138 static void qeth_bridge_emit_host_event(struct qeth_card *card,
1139 enum qeth_an_event_type evtype,
1140 u8 code,
1141 struct net_if_token *token,
1142 struct mac_addr_lnid *addr_lnid)
1143 {
1144 char str[7][32];
1145 char *env[8];
1146 int i = 0;
1147
1148 switch (evtype) {
1149 case anev_reg_unreg:
1150 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=%s",
1151 (code & IPA_ADDR_CHANGE_CODE_REMOVAL)
1152 ? "deregister" : "register");
1153 env[i] = str[i]; i++;
1154 if (code & IPA_ADDR_CHANGE_CODE_VLANID) {
1155 snprintf(str[i], sizeof(str[i]), "VLAN=%d",
1156 addr_lnid->lnid);
1157 env[i] = str[i]; i++;
1158 }
1159 if (code & IPA_ADDR_CHANGE_CODE_MACADDR) {
1160 snprintf(str[i], sizeof(str[i]), "MAC=%pM",
1161 addr_lnid->mac);
1162 env[i] = str[i]; i++;
1163 }
1164 snprintf(str[i], sizeof(str[i]), "NTOK_BUSID=%x.%x.%04x",
1165 token->cssid, token->ssid, token->devnum);
1166 env[i] = str[i]; i++;
1167 snprintf(str[i], sizeof(str[i]), "NTOK_IID=%02x", token->iid);
1168 env[i] = str[i]; i++;
1169 snprintf(str[i], sizeof(str[i]), "NTOK_CHPID=%02x",
1170 token->chpid);
1171 env[i] = str[i]; i++;
1172 snprintf(str[i], sizeof(str[i]), "NTOK_CHID=%04x", token->chid);
1173 env[i] = str[i]; i++;
1174 break;
1175 case anev_abort:
1176 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=abort");
1177 env[i] = str[i]; i++;
1178 break;
1179 case anev_reset:
1180 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=reset");
1181 env[i] = str[i]; i++;
1182 break;
1183 }
1184 env[i] = NULL;
1185 kobject_uevent_env(&card->gdev->dev.kobj, KOBJ_CHANGE, env);
1186 }
1187
1188 struct qeth_bridge_state_data {
1189 struct work_struct worker;
1190 struct qeth_card *card;
1191 u8 role;
1192 u8 state;
1193 };
1194
qeth_bridge_state_change_worker(struct work_struct * work)1195 static void qeth_bridge_state_change_worker(struct work_struct *work)
1196 {
1197 struct qeth_bridge_state_data *data =
1198 container_of(work, struct qeth_bridge_state_data, worker);
1199 char env_locrem[32];
1200 char env_role[32];
1201 char env_state[32];
1202 char *env[] = {
1203 env_locrem,
1204 env_role,
1205 env_state,
1206 NULL
1207 };
1208
1209 snprintf(env_locrem, sizeof(env_locrem), "BRIDGEPORT=statechange");
1210 snprintf(env_role, sizeof(env_role), "ROLE=%s",
1211 (data->role == QETH_SBP_ROLE_NONE) ? "none" :
1212 (data->role == QETH_SBP_ROLE_PRIMARY) ? "primary" :
1213 (data->role == QETH_SBP_ROLE_SECONDARY) ? "secondary" :
1214 "<INVALID>");
1215 snprintf(env_state, sizeof(env_state), "STATE=%s",
1216 (data->state == QETH_SBP_STATE_INACTIVE) ? "inactive" :
1217 (data->state == QETH_SBP_STATE_STANDBY) ? "standby" :
1218 (data->state == QETH_SBP_STATE_ACTIVE) ? "active" :
1219 "<INVALID>");
1220 kobject_uevent_env(&data->card->gdev->dev.kobj,
1221 KOBJ_CHANGE, env);
1222 kfree(data);
1223 }
1224
qeth_bridge_state_change(struct qeth_card * card,struct qeth_ipa_cmd * cmd)1225 static void qeth_bridge_state_change(struct qeth_card *card,
1226 struct qeth_ipa_cmd *cmd)
1227 {
1228 struct qeth_sbp_port_data *qports = &cmd->data.sbp.data.port_data;
1229 struct qeth_bridge_state_data *data;
1230
1231 QETH_CARD_TEXT(card, 2, "brstchng");
1232 if (qports->num_entries == 0) {
1233 QETH_CARD_TEXT(card, 2, "BPempty");
1234 return;
1235 }
1236 if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1237 QETH_CARD_TEXT_(card, 2, "BPsz%04x", qports->entry_length);
1238 return;
1239 }
1240
1241 data = kzalloc(sizeof(*data), GFP_ATOMIC);
1242 if (!data) {
1243 QETH_CARD_TEXT(card, 2, "BPSalloc");
1244 return;
1245 }
1246 INIT_WORK(&data->worker, qeth_bridge_state_change_worker);
1247 data->card = card;
1248 /* Information for the local port: */
1249 data->role = qports->entry[0].role;
1250 data->state = qports->entry[0].state;
1251
1252 queue_work(card->event_wq, &data->worker);
1253 }
1254
1255 struct qeth_addr_change_data {
1256 struct delayed_work dwork;
1257 struct qeth_card *card;
1258 struct qeth_ipacmd_addr_change ac_event;
1259 };
1260
qeth_l2_dev2br_worker(struct work_struct * work)1261 static void qeth_l2_dev2br_worker(struct work_struct *work)
1262 {
1263 struct delayed_work *dwork = to_delayed_work(work);
1264 struct qeth_addr_change_data *data;
1265 struct qeth_card *card;
1266 struct qeth_priv *priv;
1267 unsigned int i;
1268 int rc;
1269
1270 data = container_of(dwork, struct qeth_addr_change_data, dwork);
1271 card = data->card;
1272 priv = netdev_priv(card->dev);
1273
1274 QETH_CARD_TEXT(card, 4, "dev2brew");
1275
1276 if (READ_ONCE(card->info.pnso_mode) == QETH_PNSO_NONE)
1277 goto free;
1278
1279 /* Potential re-config in progress, try again later: */
1280 if (!rtnl_trylock()) {
1281 queue_delayed_work(card->event_wq, dwork,
1282 msecs_to_jiffies(100));
1283 return;
1284 }
1285 if (!netif_device_present(card->dev))
1286 goto out_unlock;
1287
1288 if (data->ac_event.lost_event_mask) {
1289 QETH_DBF_MESSAGE(3,
1290 "Address change notification overflow on device %x\n",
1291 CARD_DEVID(card));
1292 /* Card fdb and bridge fdb are out of sync, card has stopped
1293 * notifications (no need to drain_workqueue). Purge all
1294 * 'extern_learn' entries from the parent bridge and restart
1295 * the notifications.
1296 */
1297 qeth_l2_dev2br_fdb_flush(card);
1298 rc = qeth_l2_dev2br_an_set(card, true);
1299 if (rc) {
1300 /* TODO: if we want to retry after -EAGAIN, be
1301 * aware there could be stale entries in the
1302 * workqueue now, that need to be drained.
1303 * For now we give up:
1304 */
1305 netdev_err(card->dev,
1306 "bridge learning_sync failed to recover: %d\n",
1307 rc);
1308 WRITE_ONCE(card->info.pnso_mode,
1309 QETH_PNSO_NONE);
1310 /* To remove fdb entries reported by an_set: */
1311 qeth_l2_dev2br_fdb_flush(card);
1312 priv->brport_features ^= BR_LEARNING_SYNC;
1313 } else {
1314 QETH_DBF_MESSAGE(3,
1315 "Address Notification resynced on device %x\n",
1316 CARD_DEVID(card));
1317 }
1318 } else {
1319 for (i = 0; i < data->ac_event.num_entries; i++) {
1320 struct qeth_ipacmd_addr_change_entry *entry =
1321 &data->ac_event.entry[i];
1322 qeth_l2_dev2br_fdb_notify(card,
1323 entry->change_code,
1324 &entry->token,
1325 &entry->addr_lnid);
1326 }
1327 }
1328
1329 out_unlock:
1330 rtnl_unlock();
1331
1332 free:
1333 kfree(data);
1334 }
1335
qeth_addr_change_event_worker(struct work_struct * work)1336 static void qeth_addr_change_event_worker(struct work_struct *work)
1337 {
1338 struct delayed_work *dwork = to_delayed_work(work);
1339 struct qeth_addr_change_data *data;
1340 struct qeth_card *card;
1341 int i;
1342
1343 data = container_of(dwork, struct qeth_addr_change_data, dwork);
1344 card = data->card;
1345
1346 QETH_CARD_TEXT(data->card, 4, "adrchgew");
1347
1348 if (READ_ONCE(card->info.pnso_mode) == QETH_PNSO_NONE)
1349 goto free;
1350
1351 if (data->ac_event.lost_event_mask) {
1352 /* Potential re-config in progress, try again later: */
1353 if (!mutex_trylock(&card->sbp_lock)) {
1354 queue_delayed_work(card->event_wq, dwork,
1355 msecs_to_jiffies(100));
1356 return;
1357 }
1358
1359 dev_info(&data->card->gdev->dev,
1360 "Address change notification stopped on %s (%s)\n",
1361 netdev_name(card->dev),
1362 (data->ac_event.lost_event_mask == 0x01)
1363 ? "Overflow"
1364 : (data->ac_event.lost_event_mask == 0x02)
1365 ? "Bridge port state change"
1366 : "Unknown reason");
1367
1368 data->card->options.sbp.hostnotification = 0;
1369 card->info.pnso_mode = QETH_PNSO_NONE;
1370 mutex_unlock(&data->card->sbp_lock);
1371 qeth_bridge_emit_host_event(data->card, anev_abort,
1372 0, NULL, NULL);
1373 } else
1374 for (i = 0; i < data->ac_event.num_entries; i++) {
1375 struct qeth_ipacmd_addr_change_entry *entry =
1376 &data->ac_event.entry[i];
1377 qeth_bridge_emit_host_event(data->card,
1378 anev_reg_unreg,
1379 entry->change_code,
1380 &entry->token,
1381 &entry->addr_lnid);
1382 }
1383
1384 free:
1385 kfree(data);
1386 }
1387
qeth_addr_change_event(struct qeth_card * card,struct qeth_ipa_cmd * cmd)1388 static void qeth_addr_change_event(struct qeth_card *card,
1389 struct qeth_ipa_cmd *cmd)
1390 {
1391 struct qeth_ipacmd_addr_change *hostevs =
1392 &cmd->data.addrchange;
1393 struct qeth_addr_change_data *data;
1394 int extrasize;
1395
1396 if (card->info.pnso_mode == QETH_PNSO_NONE)
1397 return;
1398
1399 QETH_CARD_TEXT(card, 4, "adrchgev");
1400 if (cmd->hdr.return_code != 0x0000) {
1401 if (cmd->hdr.return_code == 0x0010) {
1402 if (hostevs->lost_event_mask == 0x00)
1403 hostevs->lost_event_mask = 0xff;
1404 } else {
1405 QETH_CARD_TEXT_(card, 2, "ACHN%04x",
1406 cmd->hdr.return_code);
1407 return;
1408 }
1409 }
1410 extrasize = sizeof(struct qeth_ipacmd_addr_change_entry) *
1411 hostevs->num_entries;
1412 data = kzalloc(sizeof(struct qeth_addr_change_data) + extrasize,
1413 GFP_ATOMIC);
1414 if (!data) {
1415 QETH_CARD_TEXT(card, 2, "ACNalloc");
1416 return;
1417 }
1418 if (card->info.pnso_mode == QETH_PNSO_BRIDGEPORT)
1419 INIT_DELAYED_WORK(&data->dwork, qeth_addr_change_event_worker);
1420 else
1421 INIT_DELAYED_WORK(&data->dwork, qeth_l2_dev2br_worker);
1422 data->card = card;
1423 memcpy(&data->ac_event, hostevs,
1424 sizeof(struct qeth_ipacmd_addr_change) + extrasize);
1425 queue_delayed_work(card->event_wq, &data->dwork, 0);
1426 }
1427
1428 /* SETBRIDGEPORT support; sending commands */
1429
1430 struct _qeth_sbp_cbctl {
1431 union {
1432 u32 supported;
1433 struct {
1434 enum qeth_sbp_roles *role;
1435 enum qeth_sbp_states *state;
1436 } qports;
1437 } data;
1438 };
1439
qeth_bridgeport_makerc(struct qeth_card * card,struct qeth_ipa_cmd * cmd)1440 static int qeth_bridgeport_makerc(struct qeth_card *card,
1441 struct qeth_ipa_cmd *cmd)
1442 {
1443 struct qeth_ipacmd_setbridgeport *sbp = &cmd->data.sbp;
1444 enum qeth_ipa_sbp_cmd setcmd = sbp->hdr.command_code;
1445 u16 ipa_rc = cmd->hdr.return_code;
1446 u16 sbp_rc = sbp->hdr.return_code;
1447 int rc;
1448
1449 if (ipa_rc == IPA_RC_SUCCESS && sbp_rc == IPA_RC_SUCCESS)
1450 return 0;
1451
1452 if ((IS_IQD(card) && ipa_rc == IPA_RC_SUCCESS) ||
1453 (!IS_IQD(card) && ipa_rc == sbp_rc)) {
1454 switch (sbp_rc) {
1455 case IPA_RC_SUCCESS:
1456 rc = 0;
1457 break;
1458 case IPA_RC_L2_UNSUPPORTED_CMD:
1459 case IPA_RC_UNSUPPORTED_COMMAND:
1460 rc = -EOPNOTSUPP;
1461 break;
1462 case IPA_RC_SBP_OSA_NOT_CONFIGURED:
1463 case IPA_RC_SBP_IQD_NOT_CONFIGURED:
1464 rc = -ENODEV; /* maybe not the best code here? */
1465 dev_err(&card->gdev->dev,
1466 "The device is not configured as a Bridge Port\n");
1467 break;
1468 case IPA_RC_SBP_OSA_OS_MISMATCH:
1469 case IPA_RC_SBP_IQD_OS_MISMATCH:
1470 rc = -EPERM;
1471 dev_err(&card->gdev->dev,
1472 "A Bridge Port is already configured by a different operating system\n");
1473 break;
1474 case IPA_RC_SBP_OSA_ANO_DEV_PRIMARY:
1475 case IPA_RC_SBP_IQD_ANO_DEV_PRIMARY:
1476 switch (setcmd) {
1477 case IPA_SBP_SET_PRIMARY_BRIDGE_PORT:
1478 rc = -EEXIST;
1479 dev_err(&card->gdev->dev,
1480 "The LAN already has a primary Bridge Port\n");
1481 break;
1482 case IPA_SBP_SET_SECONDARY_BRIDGE_PORT:
1483 rc = -EBUSY;
1484 dev_err(&card->gdev->dev,
1485 "The device is already a primary Bridge Port\n");
1486 break;
1487 default:
1488 rc = -EIO;
1489 }
1490 break;
1491 case IPA_RC_SBP_OSA_CURRENT_SECOND:
1492 case IPA_RC_SBP_IQD_CURRENT_SECOND:
1493 rc = -EBUSY;
1494 dev_err(&card->gdev->dev,
1495 "The device is already a secondary Bridge Port\n");
1496 break;
1497 case IPA_RC_SBP_OSA_LIMIT_SECOND:
1498 case IPA_RC_SBP_IQD_LIMIT_SECOND:
1499 rc = -EEXIST;
1500 dev_err(&card->gdev->dev,
1501 "The LAN cannot have more secondary Bridge Ports\n");
1502 break;
1503 case IPA_RC_SBP_OSA_CURRENT_PRIMARY:
1504 case IPA_RC_SBP_IQD_CURRENT_PRIMARY:
1505 rc = -EBUSY;
1506 dev_err(&card->gdev->dev,
1507 "The device is already a primary Bridge Port\n");
1508 break;
1509 case IPA_RC_SBP_OSA_NOT_AUTHD_BY_ZMAN:
1510 case IPA_RC_SBP_IQD_NOT_AUTHD_BY_ZMAN:
1511 rc = -EACCES;
1512 dev_err(&card->gdev->dev,
1513 "The device is not authorized to be a Bridge Port\n");
1514 break;
1515 default:
1516 rc = -EIO;
1517 }
1518 } else {
1519 switch (ipa_rc) {
1520 case IPA_RC_NOTSUPP:
1521 rc = -EOPNOTSUPP;
1522 break;
1523 case IPA_RC_UNSUPPORTED_COMMAND:
1524 rc = -EOPNOTSUPP;
1525 break;
1526 default:
1527 rc = -EIO;
1528 }
1529 }
1530
1531 if (rc) {
1532 QETH_CARD_TEXT_(card, 2, "SBPi%04x", ipa_rc);
1533 QETH_CARD_TEXT_(card, 2, "SBPc%04x", sbp_rc);
1534 }
1535 return rc;
1536 }
1537
qeth_sbp_build_cmd(struct qeth_card * card,enum qeth_ipa_sbp_cmd sbp_cmd,unsigned int data_length)1538 static struct qeth_cmd_buffer *qeth_sbp_build_cmd(struct qeth_card *card,
1539 enum qeth_ipa_sbp_cmd sbp_cmd,
1540 unsigned int data_length)
1541 {
1542 enum qeth_ipa_cmds ipa_cmd = IS_IQD(card) ? IPA_CMD_SETBRIDGEPORT_IQD :
1543 IPA_CMD_SETBRIDGEPORT_OSA;
1544 struct qeth_ipacmd_sbp_hdr *hdr;
1545 struct qeth_cmd_buffer *iob;
1546
1547 iob = qeth_ipa_alloc_cmd(card, ipa_cmd, QETH_PROT_NONE,
1548 data_length +
1549 offsetof(struct qeth_ipacmd_setbridgeport,
1550 data));
1551 if (!iob)
1552 return iob;
1553
1554 hdr = &__ipa_cmd(iob)->data.sbp.hdr;
1555 hdr->cmdlength = sizeof(*hdr) + data_length;
1556 hdr->command_code = sbp_cmd;
1557 hdr->used_total = 1;
1558 hdr->seq_no = 1;
1559 return iob;
1560 }
1561
qeth_bridgeport_query_support_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)1562 static int qeth_bridgeport_query_support_cb(struct qeth_card *card,
1563 struct qeth_reply *reply, unsigned long data)
1564 {
1565 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1566 struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1567 int rc;
1568
1569 QETH_CARD_TEXT(card, 2, "brqsupcb");
1570 rc = qeth_bridgeport_makerc(card, cmd);
1571 if (rc)
1572 return rc;
1573
1574 cbctl->data.supported =
1575 cmd->data.sbp.data.query_cmds_supp.supported_cmds;
1576 return 0;
1577 }
1578
1579 /**
1580 * qeth_bridgeport_query_support() - store bitmask of supported subfunctions.
1581 * @card: qeth_card structure pointer.
1582 *
1583 * Sets bitmask of supported setbridgeport subfunctions in the qeth_card
1584 * strucutre: card->options.sbp.supported_funcs.
1585 */
qeth_bridgeport_query_support(struct qeth_card * card)1586 static void qeth_bridgeport_query_support(struct qeth_card *card)
1587 {
1588 struct qeth_cmd_buffer *iob;
1589 struct _qeth_sbp_cbctl cbctl;
1590
1591 QETH_CARD_TEXT(card, 2, "brqsuppo");
1592 iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_COMMANDS_SUPPORTED,
1593 SBP_DATA_SIZEOF(query_cmds_supp));
1594 if (!iob)
1595 return;
1596
1597 if (qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_support_cb,
1598 &cbctl)) {
1599 card->options.sbp.role = QETH_SBP_ROLE_NONE;
1600 card->options.sbp.supported_funcs = 0;
1601 return;
1602 }
1603 card->options.sbp.supported_funcs = cbctl.data.supported;
1604 }
1605
qeth_bridgeport_query_ports_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)1606 static int qeth_bridgeport_query_ports_cb(struct qeth_card *card,
1607 struct qeth_reply *reply, unsigned long data)
1608 {
1609 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1610 struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1611 struct qeth_sbp_port_data *qports;
1612 int rc;
1613
1614 QETH_CARD_TEXT(card, 2, "brqprtcb");
1615 rc = qeth_bridgeport_makerc(card, cmd);
1616 if (rc)
1617 return rc;
1618
1619 qports = &cmd->data.sbp.data.port_data;
1620 if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1621 QETH_CARD_TEXT_(card, 2, "SBPs%04x", qports->entry_length);
1622 return -EINVAL;
1623 }
1624 /* first entry contains the state of the local port */
1625 if (qports->num_entries > 0) {
1626 if (cbctl->data.qports.role)
1627 *cbctl->data.qports.role = qports->entry[0].role;
1628 if (cbctl->data.qports.state)
1629 *cbctl->data.qports.state = qports->entry[0].state;
1630 }
1631 return 0;
1632 }
1633
1634 /**
1635 * qeth_bridgeport_query_ports() - query local bridgeport status.
1636 * @card: qeth_card structure pointer.
1637 * @role: Role of the port: 0-none, 1-primary, 2-secondary.
1638 * @state: State of the port: 0-inactive, 1-standby, 2-active.
1639 *
1640 * Returns negative errno-compatible error indication or 0 on success.
1641 *
1642 * 'role' and 'state' are not updated in case of hardware operation failure.
1643 */
qeth_bridgeport_query_ports(struct qeth_card * card,enum qeth_sbp_roles * role,enum qeth_sbp_states * state)1644 int qeth_bridgeport_query_ports(struct qeth_card *card,
1645 enum qeth_sbp_roles *role, enum qeth_sbp_states *state)
1646 {
1647 struct qeth_cmd_buffer *iob;
1648 struct _qeth_sbp_cbctl cbctl = {
1649 .data = {
1650 .qports = {
1651 .role = role,
1652 .state = state,
1653 },
1654 },
1655 };
1656
1657 QETH_CARD_TEXT(card, 2, "brqports");
1658 if (!(card->options.sbp.supported_funcs & IPA_SBP_QUERY_BRIDGE_PORTS))
1659 return -EOPNOTSUPP;
1660 iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_BRIDGE_PORTS, 0);
1661 if (!iob)
1662 return -ENOMEM;
1663
1664 return qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_ports_cb,
1665 &cbctl);
1666 }
1667
qeth_bridgeport_set_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)1668 static int qeth_bridgeport_set_cb(struct qeth_card *card,
1669 struct qeth_reply *reply, unsigned long data)
1670 {
1671 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
1672
1673 QETH_CARD_TEXT(card, 2, "brsetrcb");
1674 return qeth_bridgeport_makerc(card, cmd);
1675 }
1676
1677 /**
1678 * qeth_bridgeport_setrole() - Assign primary role to the port.
1679 * @card: qeth_card structure pointer.
1680 * @role: Role to assign.
1681 *
1682 * Returns negative errno-compatible error indication or 0 on success.
1683 */
qeth_bridgeport_setrole(struct qeth_card * card,enum qeth_sbp_roles role)1684 int qeth_bridgeport_setrole(struct qeth_card *card, enum qeth_sbp_roles role)
1685 {
1686 struct qeth_cmd_buffer *iob;
1687 enum qeth_ipa_sbp_cmd setcmd;
1688 unsigned int cmdlength = 0;
1689
1690 QETH_CARD_TEXT(card, 2, "brsetrol");
1691 switch (role) {
1692 case QETH_SBP_ROLE_NONE:
1693 setcmd = IPA_SBP_RESET_BRIDGE_PORT_ROLE;
1694 break;
1695 case QETH_SBP_ROLE_PRIMARY:
1696 setcmd = IPA_SBP_SET_PRIMARY_BRIDGE_PORT;
1697 cmdlength = SBP_DATA_SIZEOF(set_primary);
1698 break;
1699 case QETH_SBP_ROLE_SECONDARY:
1700 setcmd = IPA_SBP_SET_SECONDARY_BRIDGE_PORT;
1701 break;
1702 default:
1703 return -EINVAL;
1704 }
1705 if (!(card->options.sbp.supported_funcs & setcmd))
1706 return -EOPNOTSUPP;
1707 iob = qeth_sbp_build_cmd(card, setcmd, cmdlength);
1708 if (!iob)
1709 return -ENOMEM;
1710
1711 return qeth_send_ipa_cmd(card, iob, qeth_bridgeport_set_cb, NULL);
1712 }
1713
qeth_bridgeport_an_set_cb(void * priv,struct chsc_pnso_naid_l2 * entry)1714 static void qeth_bridgeport_an_set_cb(void *priv,
1715 struct chsc_pnso_naid_l2 *entry)
1716 {
1717 struct qeth_card *card = (struct qeth_card *)priv;
1718 u8 code;
1719
1720 code = IPA_ADDR_CHANGE_CODE_MACADDR;
1721 if (entry->addr_lnid.lnid < VLAN_N_VID)
1722 code |= IPA_ADDR_CHANGE_CODE_VLANID;
1723 qeth_bridge_emit_host_event(card, anev_reg_unreg, code,
1724 (struct net_if_token *)&entry->nit,
1725 (struct mac_addr_lnid *)&entry->addr_lnid);
1726 }
1727
1728 /**
1729 * qeth_bridgeport_an_set() - Enable or disable bridgeport address notification
1730 * @card: qeth_card structure pointer.
1731 * @enable: 0 - disable, non-zero - enable notifications
1732 *
1733 * Returns negative errno-compatible error indication or 0 on success.
1734 *
1735 * On enable, emits a series of address notifications udev events for all
1736 * currently registered hosts.
1737 */
qeth_bridgeport_an_set(struct qeth_card * card,int enable)1738 int qeth_bridgeport_an_set(struct qeth_card *card, int enable)
1739 {
1740 int rc;
1741
1742 if (!card->options.sbp.supported_funcs)
1743 return -EOPNOTSUPP;
1744
1745 if (enable) {
1746 qeth_bridge_emit_host_event(card, anev_reset, 0, NULL, NULL);
1747 qeth_l2_set_pnso_mode(card, QETH_PNSO_BRIDGEPORT);
1748 rc = qeth_l2_pnso(card, PNSO_OC_NET_BRIDGE_INFO, 1,
1749 qeth_bridgeport_an_set_cb, card);
1750 if (rc)
1751 qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
1752 } else {
1753 rc = qeth_l2_pnso(card, PNSO_OC_NET_BRIDGE_INFO, 0, NULL, NULL);
1754 qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
1755 }
1756 return rc;
1757 }
1758
1759 /* VNIC Characteristics support */
1760
1761 /* handle VNICC IPA command return codes; convert to error codes */
qeth_l2_vnicc_makerc(struct qeth_card * card,u16 ipa_rc)1762 static int qeth_l2_vnicc_makerc(struct qeth_card *card, u16 ipa_rc)
1763 {
1764 int rc;
1765
1766 switch (ipa_rc) {
1767 case IPA_RC_SUCCESS:
1768 return ipa_rc;
1769 case IPA_RC_L2_UNSUPPORTED_CMD:
1770 case IPA_RC_NOTSUPP:
1771 rc = -EOPNOTSUPP;
1772 break;
1773 case IPA_RC_VNICC_OOSEQ:
1774 rc = -EALREADY;
1775 break;
1776 case IPA_RC_VNICC_VNICBP:
1777 rc = -EBUSY;
1778 break;
1779 case IPA_RC_L2_ADDR_TABLE_FULL:
1780 rc = -ENOSPC;
1781 break;
1782 case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
1783 rc = -EACCES;
1784 break;
1785 default:
1786 rc = -EIO;
1787 }
1788
1789 QETH_CARD_TEXT_(card, 2, "err%04x", ipa_rc);
1790 return rc;
1791 }
1792
1793 /* generic VNICC request call back */
qeth_l2_vnicc_request_cb(struct qeth_card * card,struct qeth_reply * reply,unsigned long data)1794 static int qeth_l2_vnicc_request_cb(struct qeth_card *card,
1795 struct qeth_reply *reply,
1796 unsigned long data)
1797 {
1798 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1799 struct qeth_ipacmd_vnicc *rep = &cmd->data.vnicc;
1800 u32 sub_cmd = cmd->data.vnicc.hdr.sub_command;
1801
1802 QETH_CARD_TEXT(card, 2, "vniccrcb");
1803 if (cmd->hdr.return_code)
1804 return qeth_l2_vnicc_makerc(card, cmd->hdr.return_code);
1805 /* return results to caller */
1806 card->options.vnicc.sup_chars = rep->vnicc_cmds.supported;
1807 card->options.vnicc.cur_chars = rep->vnicc_cmds.enabled;
1808
1809 if (sub_cmd == IPA_VNICC_QUERY_CMDS)
1810 *(u32 *)reply->param = rep->data.query_cmds.sup_cmds;
1811 else if (sub_cmd == IPA_VNICC_GET_TIMEOUT)
1812 *(u32 *)reply->param = rep->data.getset_timeout.timeout;
1813
1814 return 0;
1815 }
1816
qeth_l2_vnicc_build_cmd(struct qeth_card * card,u32 vnicc_cmd,unsigned int data_length)1817 static struct qeth_cmd_buffer *qeth_l2_vnicc_build_cmd(struct qeth_card *card,
1818 u32 vnicc_cmd,
1819 unsigned int data_length)
1820 {
1821 struct qeth_ipacmd_vnicc_hdr *hdr;
1822 struct qeth_cmd_buffer *iob;
1823
1824 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_VNICC, QETH_PROT_NONE,
1825 data_length +
1826 offsetof(struct qeth_ipacmd_vnicc, data));
1827 if (!iob)
1828 return NULL;
1829
1830 hdr = &__ipa_cmd(iob)->data.vnicc.hdr;
1831 hdr->data_length = sizeof(*hdr) + data_length;
1832 hdr->sub_command = vnicc_cmd;
1833 return iob;
1834 }
1835
1836 /* VNICC query VNIC characteristics request */
qeth_l2_vnicc_query_chars(struct qeth_card * card)1837 static int qeth_l2_vnicc_query_chars(struct qeth_card *card)
1838 {
1839 struct qeth_cmd_buffer *iob;
1840
1841 QETH_CARD_TEXT(card, 2, "vniccqch");
1842 iob = qeth_l2_vnicc_build_cmd(card, IPA_VNICC_QUERY_CHARS, 0);
1843 if (!iob)
1844 return -ENOMEM;
1845
1846 return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, NULL);
1847 }
1848
1849 /* VNICC query sub commands request */
qeth_l2_vnicc_query_cmds(struct qeth_card * card,u32 vnic_char,u32 * sup_cmds)1850 static int qeth_l2_vnicc_query_cmds(struct qeth_card *card, u32 vnic_char,
1851 u32 *sup_cmds)
1852 {
1853 struct qeth_cmd_buffer *iob;
1854
1855 QETH_CARD_TEXT(card, 2, "vniccqcm");
1856 iob = qeth_l2_vnicc_build_cmd(card, IPA_VNICC_QUERY_CMDS,
1857 VNICC_DATA_SIZEOF(query_cmds));
1858 if (!iob)
1859 return -ENOMEM;
1860
1861 __ipa_cmd(iob)->data.vnicc.data.query_cmds.vnic_char = vnic_char;
1862
1863 return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, sup_cmds);
1864 }
1865
1866 /* VNICC enable/disable characteristic request */
qeth_l2_vnicc_set_char(struct qeth_card * card,u32 vnic_char,u32 cmd)1867 static int qeth_l2_vnicc_set_char(struct qeth_card *card, u32 vnic_char,
1868 u32 cmd)
1869 {
1870 struct qeth_cmd_buffer *iob;
1871
1872 QETH_CARD_TEXT(card, 2, "vniccedc");
1873 iob = qeth_l2_vnicc_build_cmd(card, cmd, VNICC_DATA_SIZEOF(set_char));
1874 if (!iob)
1875 return -ENOMEM;
1876
1877 __ipa_cmd(iob)->data.vnicc.data.set_char.vnic_char = vnic_char;
1878
1879 return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, NULL);
1880 }
1881
1882 /* VNICC get/set timeout for characteristic request */
qeth_l2_vnicc_getset_timeout(struct qeth_card * card,u32 vnicc,u32 cmd,u32 * timeout)1883 static int qeth_l2_vnicc_getset_timeout(struct qeth_card *card, u32 vnicc,
1884 u32 cmd, u32 *timeout)
1885 {
1886 struct qeth_vnicc_getset_timeout *getset_timeout;
1887 struct qeth_cmd_buffer *iob;
1888
1889 QETH_CARD_TEXT(card, 2, "vniccgst");
1890 iob = qeth_l2_vnicc_build_cmd(card, cmd,
1891 VNICC_DATA_SIZEOF(getset_timeout));
1892 if (!iob)
1893 return -ENOMEM;
1894
1895 getset_timeout = &__ipa_cmd(iob)->data.vnicc.data.getset_timeout;
1896 getset_timeout->vnic_char = vnicc;
1897
1898 if (cmd == IPA_VNICC_SET_TIMEOUT)
1899 getset_timeout->timeout = *timeout;
1900
1901 return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, timeout);
1902 }
1903
1904 /* recover user timeout setting */
qeth_l2_vnicc_recover_timeout(struct qeth_card * card,u32 vnicc,u32 * timeout)1905 static bool qeth_l2_vnicc_recover_timeout(struct qeth_card *card, u32 vnicc,
1906 u32 *timeout)
1907 {
1908 if (card->options.vnicc.sup_chars & vnicc &&
1909 card->options.vnicc.getset_timeout_sup & vnicc &&
1910 !qeth_l2_vnicc_getset_timeout(card, vnicc, IPA_VNICC_SET_TIMEOUT,
1911 timeout))
1912 return false;
1913 *timeout = QETH_VNICC_DEFAULT_TIMEOUT;
1914 return true;
1915 }
1916
1917 /* set current VNICC flag state; called from sysfs store function */
qeth_l2_vnicc_set_state(struct qeth_card * card,u32 vnicc,bool state)1918 int qeth_l2_vnicc_set_state(struct qeth_card *card, u32 vnicc, bool state)
1919 {
1920 int rc = 0;
1921 u32 cmd;
1922
1923 QETH_CARD_TEXT(card, 2, "vniccsch");
1924
1925 /* check if characteristic and enable/disable are supported */
1926 if (!(card->options.vnicc.sup_chars & vnicc) ||
1927 !(card->options.vnicc.set_char_sup & vnicc))
1928 return -EOPNOTSUPP;
1929
1930 if (qeth_bridgeport_is_in_use(card))
1931 return -EBUSY;
1932
1933 /* set enable/disable command and store wanted characteristic */
1934 if (state) {
1935 cmd = IPA_VNICC_ENABLE;
1936 card->options.vnicc.wanted_chars |= vnicc;
1937 } else {
1938 cmd = IPA_VNICC_DISABLE;
1939 card->options.vnicc.wanted_chars &= ~vnicc;
1940 }
1941
1942 /* do we need to do anything? */
1943 if (card->options.vnicc.cur_chars == card->options.vnicc.wanted_chars)
1944 return rc;
1945
1946 /* if card is not ready, simply stop here */
1947 if (!qeth_card_hw_is_reachable(card)) {
1948 if (state)
1949 card->options.vnicc.cur_chars |= vnicc;
1950 else
1951 card->options.vnicc.cur_chars &= ~vnicc;
1952 return rc;
1953 }
1954
1955 rc = qeth_l2_vnicc_set_char(card, vnicc, cmd);
1956 if (rc)
1957 card->options.vnicc.wanted_chars =
1958 card->options.vnicc.cur_chars;
1959 else {
1960 /* successful online VNICC change; handle special cases */
1961 if (state && vnicc == QETH_VNICC_RX_BCAST)
1962 card->options.vnicc.rx_bcast_enabled = true;
1963 if (!state && vnicc == QETH_VNICC_LEARNING)
1964 qeth_l2_vnicc_recover_timeout(card, vnicc,
1965 &card->options.vnicc.learning_timeout);
1966 }
1967
1968 return rc;
1969 }
1970
1971 /* get current VNICC flag state; called from sysfs show function */
qeth_l2_vnicc_get_state(struct qeth_card * card,u32 vnicc,bool * state)1972 int qeth_l2_vnicc_get_state(struct qeth_card *card, u32 vnicc, bool *state)
1973 {
1974 int rc = 0;
1975
1976 QETH_CARD_TEXT(card, 2, "vniccgch");
1977
1978 /* check if characteristic is supported */
1979 if (!(card->options.vnicc.sup_chars & vnicc))
1980 return -EOPNOTSUPP;
1981
1982 if (qeth_bridgeport_is_in_use(card))
1983 return -EBUSY;
1984
1985 /* if card is ready, query current VNICC state */
1986 if (qeth_card_hw_is_reachable(card))
1987 rc = qeth_l2_vnicc_query_chars(card);
1988
1989 *state = (card->options.vnicc.cur_chars & vnicc) ? true : false;
1990 return rc;
1991 }
1992
1993 /* set VNICC timeout; called from sysfs store function. Currently, only learning
1994 * supports timeout
1995 */
qeth_l2_vnicc_set_timeout(struct qeth_card * card,u32 timeout)1996 int qeth_l2_vnicc_set_timeout(struct qeth_card *card, u32 timeout)
1997 {
1998 int rc = 0;
1999
2000 QETH_CARD_TEXT(card, 2, "vniccsto");
2001
2002 /* check if characteristic and set_timeout are supported */
2003 if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
2004 !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
2005 return -EOPNOTSUPP;
2006
2007 if (qeth_bridgeport_is_in_use(card))
2008 return -EBUSY;
2009
2010 /* do we need to do anything? */
2011 if (card->options.vnicc.learning_timeout == timeout)
2012 return rc;
2013
2014 /* if card is not ready, simply store the value internally and return */
2015 if (!qeth_card_hw_is_reachable(card)) {
2016 card->options.vnicc.learning_timeout = timeout;
2017 return rc;
2018 }
2019
2020 /* send timeout value to card; if successful, store value internally */
2021 rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
2022 IPA_VNICC_SET_TIMEOUT, &timeout);
2023 if (!rc)
2024 card->options.vnicc.learning_timeout = timeout;
2025
2026 return rc;
2027 }
2028
2029 /* get current VNICC timeout; called from sysfs show function. Currently, only
2030 * learning supports timeout
2031 */
qeth_l2_vnicc_get_timeout(struct qeth_card * card,u32 * timeout)2032 int qeth_l2_vnicc_get_timeout(struct qeth_card *card, u32 *timeout)
2033 {
2034 int rc = 0;
2035
2036 QETH_CARD_TEXT(card, 2, "vniccgto");
2037
2038 /* check if characteristic and get_timeout are supported */
2039 if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
2040 !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
2041 return -EOPNOTSUPP;
2042
2043 if (qeth_bridgeport_is_in_use(card))
2044 return -EBUSY;
2045
2046 /* if card is ready, get timeout. Otherwise, just return stored value */
2047 *timeout = card->options.vnicc.learning_timeout;
2048 if (qeth_card_hw_is_reachable(card))
2049 rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
2050 IPA_VNICC_GET_TIMEOUT,
2051 timeout);
2052
2053 return rc;
2054 }
2055
2056 /* check if VNICC is currently enabled */
_qeth_l2_vnicc_is_in_use(struct qeth_card * card)2057 static bool _qeth_l2_vnicc_is_in_use(struct qeth_card *card)
2058 {
2059 if (!card->options.vnicc.sup_chars)
2060 return false;
2061 /* default values are only OK if rx_bcast was not enabled by user
2062 * or the card is offline.
2063 */
2064 if (card->options.vnicc.cur_chars == QETH_VNICC_DEFAULT) {
2065 if (!card->options.vnicc.rx_bcast_enabled ||
2066 !qeth_card_hw_is_reachable(card))
2067 return false;
2068 }
2069 return true;
2070 }
2071
2072 /**
2073 * qeth_bridgeport_allowed - are any qeth_bridgeport functions allowed?
2074 * @card: qeth_card structure pointer
2075 *
2076 * qeth_bridgeport functionality is mutually exclusive with usage of the
2077 * VNIC Characteristics and dev2br address notifications
2078 */
qeth_bridgeport_allowed(struct qeth_card * card)2079 bool qeth_bridgeport_allowed(struct qeth_card *card)
2080 {
2081 struct qeth_priv *priv = netdev_priv(card->dev);
2082
2083 return (!_qeth_l2_vnicc_is_in_use(card) &&
2084 !(priv->brport_features & BR_LEARNING_SYNC));
2085 }
2086
2087 /* recover user characteristic setting */
qeth_l2_vnicc_recover_char(struct qeth_card * card,u32 vnicc,bool enable)2088 static bool qeth_l2_vnicc_recover_char(struct qeth_card *card, u32 vnicc,
2089 bool enable)
2090 {
2091 u32 cmd = enable ? IPA_VNICC_ENABLE : IPA_VNICC_DISABLE;
2092
2093 if (card->options.vnicc.sup_chars & vnicc &&
2094 card->options.vnicc.set_char_sup & vnicc &&
2095 !qeth_l2_vnicc_set_char(card, vnicc, cmd))
2096 return false;
2097 card->options.vnicc.wanted_chars &= ~vnicc;
2098 card->options.vnicc.wanted_chars |= QETH_VNICC_DEFAULT & vnicc;
2099 return true;
2100 }
2101
2102 /* (re-)initialize VNICC */
qeth_l2_vnicc_init(struct qeth_card * card)2103 static void qeth_l2_vnicc_init(struct qeth_card *card)
2104 {
2105 u32 *timeout = &card->options.vnicc.learning_timeout;
2106 bool enable, error = false;
2107 unsigned int chars_len, i;
2108 unsigned long chars_tmp;
2109 u32 sup_cmds, vnicc;
2110
2111 QETH_CARD_TEXT(card, 2, "vniccini");
2112 /* reset rx_bcast */
2113 card->options.vnicc.rx_bcast_enabled = 0;
2114 /* initial query and storage of VNIC characteristics */
2115 if (qeth_l2_vnicc_query_chars(card)) {
2116 if (card->options.vnicc.wanted_chars != QETH_VNICC_DEFAULT ||
2117 *timeout != QETH_VNICC_DEFAULT_TIMEOUT)
2118 dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
2119 /* fail quietly if user didn't change the default config */
2120 card->options.vnicc.sup_chars = 0;
2121 card->options.vnicc.cur_chars = 0;
2122 card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
2123 return;
2124 }
2125 /* get supported commands for each supported characteristic */
2126 chars_tmp = card->options.vnicc.sup_chars;
2127 chars_len = sizeof(card->options.vnicc.sup_chars) * BITS_PER_BYTE;
2128 for_each_set_bit(i, &chars_tmp, chars_len) {
2129 vnicc = BIT(i);
2130 if (qeth_l2_vnicc_query_cmds(card, vnicc, &sup_cmds)) {
2131 sup_cmds = 0;
2132 error = true;
2133 }
2134 if ((sup_cmds & IPA_VNICC_SET_TIMEOUT) &&
2135 (sup_cmds & IPA_VNICC_GET_TIMEOUT))
2136 card->options.vnicc.getset_timeout_sup |= vnicc;
2137 else
2138 card->options.vnicc.getset_timeout_sup &= ~vnicc;
2139 if ((sup_cmds & IPA_VNICC_ENABLE) &&
2140 (sup_cmds & IPA_VNICC_DISABLE))
2141 card->options.vnicc.set_char_sup |= vnicc;
2142 else
2143 card->options.vnicc.set_char_sup &= ~vnicc;
2144 }
2145 /* enforce assumed default values and recover settings, if changed */
2146 error |= qeth_l2_vnicc_recover_timeout(card, QETH_VNICC_LEARNING,
2147 timeout);
2148 /* Change chars, if necessary */
2149 chars_tmp = card->options.vnicc.wanted_chars ^
2150 card->options.vnicc.cur_chars;
2151 chars_len = sizeof(card->options.vnicc.wanted_chars) * BITS_PER_BYTE;
2152 for_each_set_bit(i, &chars_tmp, chars_len) {
2153 vnicc = BIT(i);
2154 enable = card->options.vnicc.wanted_chars & vnicc;
2155 error |= qeth_l2_vnicc_recover_char(card, vnicc, enable);
2156 }
2157 if (error)
2158 dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
2159 }
2160
2161 /* configure default values of VNIC characteristics */
qeth_l2_vnicc_set_defaults(struct qeth_card * card)2162 static void qeth_l2_vnicc_set_defaults(struct qeth_card *card)
2163 {
2164 /* characteristics values */
2165 card->options.vnicc.sup_chars = QETH_VNICC_ALL;
2166 card->options.vnicc.cur_chars = QETH_VNICC_DEFAULT;
2167 card->options.vnicc.learning_timeout = QETH_VNICC_DEFAULT_TIMEOUT;
2168 /* supported commands */
2169 card->options.vnicc.set_char_sup = QETH_VNICC_ALL;
2170 card->options.vnicc.getset_timeout_sup = QETH_VNICC_LEARNING;
2171 /* settings wanted by users */
2172 card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
2173 }
2174
2175 static const struct device_type qeth_l2_devtype = {
2176 .name = "qeth_layer2",
2177 .groups = qeth_l2_attr_groups,
2178 };
2179
qeth_l2_probe_device(struct ccwgroup_device * gdev)2180 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
2181 {
2182 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
2183 int rc;
2184
2185 if (IS_OSN(card))
2186 dev_notice(&gdev->dev, "OSN support will be dropped in 2021\n");
2187
2188 qeth_l2_vnicc_set_defaults(card);
2189 mutex_init(&card->sbp_lock);
2190
2191 if (gdev->dev.type == &qeth_generic_devtype) {
2192 rc = qeth_l2_create_device_attributes(&gdev->dev);
2193 if (rc)
2194 return rc;
2195 }
2196
2197 INIT_WORK(&card->rx_mode_work, qeth_l2_rx_mode_work);
2198 return 0;
2199 }
2200
qeth_l2_remove_device(struct ccwgroup_device * gdev)2201 static void qeth_l2_remove_device(struct ccwgroup_device *gdev)
2202 {
2203 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
2204
2205 if (gdev->dev.type == &qeth_generic_devtype)
2206 qeth_l2_remove_device_attributes(&gdev->dev);
2207 qeth_set_allowed_threads(card, 0, 1);
2208 wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
2209
2210 if (gdev->state == CCWGROUP_ONLINE)
2211 qeth_set_offline(card, card->discipline, false);
2212
2213 cancel_work_sync(&card->close_dev_work);
2214 if (card->dev->reg_state == NETREG_REGISTERED)
2215 unregister_netdev(card->dev);
2216 }
2217
qeth_l2_set_online(struct qeth_card * card,bool carrier_ok)2218 static int qeth_l2_set_online(struct qeth_card *card, bool carrier_ok)
2219 {
2220 struct net_device *dev = card->dev;
2221 int rc = 0;
2222
2223 qeth_l2_detect_dev2br_support(card);
2224
2225 mutex_lock(&card->sbp_lock);
2226 qeth_bridgeport_query_support(card);
2227 if (card->options.sbp.supported_funcs) {
2228 qeth_l2_setup_bridgeport_attrs(card);
2229 dev_info(&card->gdev->dev,
2230 "The device represents a Bridge Capable Port\n");
2231 }
2232 mutex_unlock(&card->sbp_lock);
2233
2234 qeth_l2_register_dev_addr(card);
2235
2236 /* for the rx_bcast characteristic, init VNICC after setmac */
2237 qeth_l2_vnicc_init(card);
2238
2239 qeth_l2_trace_features(card);
2240
2241 /* softsetup */
2242 QETH_CARD_TEXT(card, 2, "softsetp");
2243
2244 card->state = CARD_STATE_SOFTSETUP;
2245
2246 qeth_set_allowed_threads(card, 0xffffffff, 0);
2247
2248 if (dev->reg_state != NETREG_REGISTERED) {
2249 rc = qeth_l2_setup_netdev(card);
2250 if (rc)
2251 goto err_setup;
2252
2253 if (carrier_ok)
2254 netif_carrier_on(dev);
2255 } else {
2256 rtnl_lock();
2257 rc = qeth_set_real_num_tx_queues(card,
2258 qeth_tx_actual_queues(card));
2259 if (rc) {
2260 rtnl_unlock();
2261 goto err_set_queues;
2262 }
2263
2264 if (carrier_ok)
2265 netif_carrier_on(dev);
2266 else
2267 netif_carrier_off(dev);
2268
2269 netif_device_attach(dev);
2270 qeth_enable_hw_features(dev);
2271 qeth_l2_enable_brport_features(card);
2272
2273 if (card->info.open_when_online) {
2274 card->info.open_when_online = 0;
2275 dev_open(dev, NULL);
2276 }
2277 rtnl_unlock();
2278 }
2279 return 0;
2280
2281 err_set_queues:
2282 err_setup:
2283 qeth_set_allowed_threads(card, 0, 1);
2284 card->state = CARD_STATE_DOWN;
2285 return rc;
2286 }
2287
qeth_l2_set_offline(struct qeth_card * card)2288 static void qeth_l2_set_offline(struct qeth_card *card)
2289 {
2290 struct qeth_priv *priv = netdev_priv(card->dev);
2291
2292 qeth_set_allowed_threads(card, 0, 1);
2293 qeth_l2_drain_rx_mode_cache(card);
2294
2295 if (card->state == CARD_STATE_SOFTSETUP)
2296 card->state = CARD_STATE_DOWN;
2297
2298 qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
2299 if (priv->brport_features & BR_LEARNING_SYNC) {
2300 rtnl_lock();
2301 qeth_l2_dev2br_fdb_flush(card);
2302 rtnl_unlock();
2303 }
2304 }
2305
2306 /* Returns zero if the command is successfully "consumed" */
qeth_l2_control_event(struct qeth_card * card,struct qeth_ipa_cmd * cmd)2307 static int qeth_l2_control_event(struct qeth_card *card,
2308 struct qeth_ipa_cmd *cmd)
2309 {
2310 switch (cmd->hdr.command) {
2311 case IPA_CMD_SETBRIDGEPORT_OSA:
2312 case IPA_CMD_SETBRIDGEPORT_IQD:
2313 if (cmd->data.sbp.hdr.command_code ==
2314 IPA_SBP_BRIDGE_PORT_STATE_CHANGE) {
2315 qeth_bridge_state_change(card, cmd);
2316 return 0;
2317 }
2318
2319 return 1;
2320 case IPA_CMD_ADDRESS_CHANGE_NOTIF:
2321 qeth_addr_change_event(card, cmd);
2322 return 0;
2323 default:
2324 return 1;
2325 }
2326 }
2327
2328 const struct qeth_discipline qeth_l2_discipline = {
2329 .devtype = &qeth_l2_devtype,
2330 .setup = qeth_l2_probe_device,
2331 .remove = qeth_l2_remove_device,
2332 .set_online = qeth_l2_set_online,
2333 .set_offline = qeth_l2_set_offline,
2334 .do_ioctl = NULL,
2335 .control_event_handler = qeth_l2_control_event,
2336 };
2337 EXPORT_SYMBOL_GPL(qeth_l2_discipline);
2338
qeth_l2_init(void)2339 static int __init qeth_l2_init(void)
2340 {
2341 pr_info("register layer 2 discipline\n");
2342 return 0;
2343 }
2344
qeth_l2_exit(void)2345 static void __exit qeth_l2_exit(void)
2346 {
2347 pr_info("unregister layer 2 discipline\n");
2348 }
2349
2350 module_init(qeth_l2_init);
2351 module_exit(qeth_l2_exit);
2352 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
2353 MODULE_DESCRIPTION("qeth layer 2 discipline");
2354 MODULE_LICENSE("GPL");
2355