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x86/unwinder: Handle stack overflows more gracefully
[linux/fpc-iii.git] / drivers / s390 / net / qeth_l2_main.c
blob760b023eae9562a799f7c7a90a91cbd371d99fd2
1 /*
2 * Copyright IBM Corp. 2007, 2009
3 * Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
4 * Frank Pavlic <fpavlic@de.ibm.com>,
5 * Thomas Spatzier <tspat@de.ibm.com>,
6 * Frank Blaschka <frank.blaschka@de.ibm.com>
7 */
8
9 #define KMSG_COMPONENT "qeth"
10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
11
12 #include <linux/module.h>
13 #include <linux/moduleparam.h>
14 #include <linux/string.h>
15 #include <linux/errno.h>
16 #include <linux/kernel.h>
17 #include <linux/slab.h>
18 #include <linux/etherdevice.h>
19 #include <linux/ip.h>
20 #include <linux/list.h>
21 #include <linux/hash.h>
22 #include <linux/hashtable.h>
23 #include <linux/string.h>
24 #include <asm/setup.h>
25 #include "qeth_core.h"
26 #include "qeth_l2.h"
27
28 static int qeth_l2_set_offline(struct ccwgroup_device *);
29 static int qeth_l2_stop(struct net_device *);
30 static void qeth_l2_set_rx_mode(struct net_device *);
31 static void qeth_bridgeport_query_support(struct qeth_card *card);
32 static void qeth_bridge_state_change(struct qeth_card *card,
33 struct qeth_ipa_cmd *cmd);
34 static void qeth_bridge_host_event(struct qeth_card *card,
35 struct qeth_ipa_cmd *cmd);
36
37 static int qeth_l2_verify_dev(struct net_device *dev)
38 {
39 struct qeth_card *card;
40 unsigned long flags;
41 int rc = 0;
42
43 read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
44 list_for_each_entry(card, &qeth_core_card_list.list, list) {
45 if (card->dev == dev) {
46 rc = QETH_REAL_CARD;
47 break;
48 }
49 }
50 read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
51
52 return rc;
53 }
54
55 static struct net_device *qeth_l2_netdev_by_devno(unsigned char *read_dev_no)
56 {
57 struct qeth_card *card;
58 struct net_device *ndev;
59 __u16 temp_dev_no;
60 unsigned long flags;
61 struct ccw_dev_id read_devid;
62
63 ndev = NULL;
64 memcpy(&temp_dev_no, read_dev_no, 2);
65 read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
66 list_for_each_entry(card, &qeth_core_card_list.list, list) {
67 ccw_device_get_id(CARD_RDEV(card), &read_devid);
68 if (read_devid.devno == temp_dev_no) {
69 ndev = card->dev;
70 break;
71 }
72 }
73 read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
74 return ndev;
75 }
76
77 static int qeth_setdel_makerc(struct qeth_card *card, int retcode)
78 {
79 int rc;
80
81 if (retcode)
82 QETH_CARD_TEXT_(card, 2, "err%04x", retcode);
83 switch (retcode) {
84 case IPA_RC_SUCCESS:
85 rc = 0;
86 break;
87 case IPA_RC_L2_UNSUPPORTED_CMD:
88 rc = -EOPNOTSUPP;
89 break;
90 case IPA_RC_L2_ADDR_TABLE_FULL:
91 rc = -ENOSPC;
92 break;
93 case IPA_RC_L2_DUP_MAC:
94 case IPA_RC_L2_DUP_LAYER3_MAC:
95 rc = -EEXIST;
96 break;
97 case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
98 case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
99 rc = -EPERM;
100 break;
101 case IPA_RC_L2_MAC_NOT_FOUND:
102 rc = -ENOENT;
103 break;
104 case -ENOMEM:
105 rc = -ENOMEM;
106 break;
107 default:
108 rc = -EIO;
109 break;
110 }
111 return rc;
112 }
113
114 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
115 enum qeth_ipa_cmds ipacmd)
116 {
117 struct qeth_ipa_cmd *cmd;
118 struct qeth_cmd_buffer *iob;
119
120 QETH_CARD_TEXT(card, 2, "L2sdmac");
121 iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
122 if (!iob)
123 return -ENOMEM;
124 cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
125 cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
126 memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
127 return qeth_setdel_makerc(card, qeth_send_ipa_cmd(card, iob,
128 NULL, NULL));
129 }
130
131 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
132 {
133 int rc;
134
135 QETH_CARD_TEXT(card, 2, "L2Setmac");
136 rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC);
137 if (rc == 0) {
138 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
139 memcpy(card->dev->dev_addr, mac, OSA_ADDR_LEN);
140 dev_info(&card->gdev->dev,
141 "MAC address %pM successfully registered on device %s\n",
142 card->dev->dev_addr, card->dev->name);
143 } else {
144 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
145 switch (rc) {
146 case -EEXIST:
147 dev_warn(&card->gdev->dev,
148 "MAC address %pM already exists\n", mac);
149 break;
150 case -EPERM:
151 dev_warn(&card->gdev->dev,
152 "MAC address %pM is not authorized\n", mac);
153 break;
154 }
155 }
156 return rc;
157 }
158
159 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
160 {
161 int rc;
162
163 QETH_CARD_TEXT(card, 2, "L2Delmac");
164 if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
165 return 0;
166 rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC);
167 if (rc == 0)
168 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
169 return rc;
170 }
171
172 static int qeth_l2_send_setgroupmac(struct qeth_card *card, __u8 *mac)
173 {
174 int rc;
175
176 QETH_CARD_TEXT(card, 2, "L2Sgmac");
177 rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETGMAC);
178 if (rc == -EEXIST)
179 QETH_DBF_MESSAGE(2, "Group MAC %pM already existing on %s\n",
180 mac, QETH_CARD_IFNAME(card));
181 else if (rc)
182 QETH_DBF_MESSAGE(2, "Could not set group MAC %pM on %s: %d\n",
183 mac, QETH_CARD_IFNAME(card), rc);
184 return rc;
185 }
186
187 static int qeth_l2_send_delgroupmac(struct qeth_card *card, __u8 *mac)
188 {
189 int rc;
190
191 QETH_CARD_TEXT(card, 2, "L2Dgmac");
192 rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELGMAC);
193 if (rc)
194 QETH_DBF_MESSAGE(2,
195 "Could not delete group MAC %pM on %s: %d\n",
196 mac, QETH_CARD_IFNAME(card), rc);
197 return rc;
198 }
199
200 static int qeth_l2_write_mac(struct qeth_card *card, struct qeth_mac *mac)
201 {
202 if (mac->is_uc) {
203 return qeth_l2_send_setdelmac(card, mac->mac_addr,
204 IPA_CMD_SETVMAC);
205 } else {
206 return qeth_l2_send_setgroupmac(card, mac->mac_addr);
207 }
208 }
209
210 static int qeth_l2_remove_mac(struct qeth_card *card, struct qeth_mac *mac)
211 {
212 if (mac->is_uc) {
213 return qeth_l2_send_setdelmac(card, mac->mac_addr,
214 IPA_CMD_DELVMAC);
215 } else {
216 return qeth_l2_send_delgroupmac(card, mac->mac_addr);
217 }
218 }
219
220 static void qeth_l2_del_all_macs(struct qeth_card *card)
221 {
222 struct qeth_mac *mac;
223 struct hlist_node *tmp;
224 int i;
225
226 spin_lock_bh(&card->mclock);
227 hash_for_each_safe(card->mac_htable, i, tmp, mac, hnode) {
228 hash_del(&mac->hnode);
229 kfree(mac);
230 }
231 spin_unlock_bh(&card->mclock);
232 }
233
234 static int qeth_l2_get_cast_type(struct qeth_card *card, struct sk_buff *skb)
235 {
236 if (card->info.type == QETH_CARD_TYPE_OSN)
237 return RTN_UNSPEC;
238 if (is_broadcast_ether_addr(skb->data))
239 return RTN_BROADCAST;
240 if (is_multicast_ether_addr(skb->data))
241 return RTN_MULTICAST;
242 return RTN_UNSPEC;
243 }
244
245 static void qeth_l2_hdr_csum(struct qeth_card *card, struct qeth_hdr *hdr,
246 struct sk_buff *skb)
247 {
248 struct iphdr *iph = ip_hdr(skb);
249
250 /* tcph->check contains already the pseudo hdr checksum
251 * so just set the header flags
252 */
253 if (iph->protocol == IPPROTO_UDP)
254 hdr->hdr.l2.flags[1] |= QETH_HDR_EXT_UDP;
255 hdr->hdr.l2.flags[1] |= QETH_HDR_EXT_CSUM_TRANSP_REQ |
256 QETH_HDR_EXT_CSUM_HDR_REQ;
257 iph->check = 0;
258 if (card->options.performance_stats)
259 card->perf_stats.tx_csum++;
260 }
261
262 static void qeth_l2_fill_header(struct qeth_hdr *hdr, struct sk_buff *skb,
263 int cast_type, unsigned int data_len)
264 {
265 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
266
267 memset(hdr, 0, sizeof(struct qeth_hdr));
268 hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
269 hdr->hdr.l2.pkt_length = data_len;
270
271 /* set byte byte 3 to casting flags */
272 if (cast_type == RTN_MULTICAST)
273 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
274 else if (cast_type == RTN_BROADCAST)
275 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
276 else
277 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
278
279 /* VSWITCH relies on the VLAN
280 * information to be present in
281 * the QDIO header */
282 if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
283 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
284 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
285 }
286 }
287
288 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
289 struct qeth_reply *reply, unsigned long data)
290 {
291 struct qeth_ipa_cmd *cmd;
292
293 QETH_CARD_TEXT(card, 2, "L2sdvcb");
294 cmd = (struct qeth_ipa_cmd *) data;
295 if (cmd->hdr.return_code) {
296 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x. "
297 "Continuing\n", cmd->data.setdelvlan.vlan_id,
298 QETH_CARD_IFNAME(card), cmd->hdr.return_code);
299 QETH_CARD_TEXT_(card, 2, "L2VL%4x", cmd->hdr.command);
300 QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code);
301 }
302 return 0;
303 }
304
305 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
306 enum qeth_ipa_cmds ipacmd)
307 {
308 struct qeth_ipa_cmd *cmd;
309 struct qeth_cmd_buffer *iob;
310
311 QETH_CARD_TEXT_(card, 4, "L2sdv%x", ipacmd);
312 iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
313 if (!iob)
314 return -ENOMEM;
315 cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
316 cmd->data.setdelvlan.vlan_id = i;
317 return qeth_send_ipa_cmd(card, iob,
318 qeth_l2_send_setdelvlan_cb, NULL);
319 }
320
321 static void qeth_l2_process_vlans(struct qeth_card *card)
322 {
323 struct qeth_vlan_vid *id;
324 QETH_CARD_TEXT(card, 3, "L2prcvln");
325 spin_lock_bh(&card->vlanlock);
326 list_for_each_entry(id, &card->vid_list, list) {
327 qeth_l2_send_setdelvlan(card, id->vid, IPA_CMD_SETVLAN);
328 }
329 spin_unlock_bh(&card->vlanlock);
330 }
331
332 static int qeth_l2_vlan_rx_add_vid(struct net_device *dev,
333 __be16 proto, u16 vid)
334 {
335 struct qeth_card *card = dev->ml_priv;
336 struct qeth_vlan_vid *id;
337 int rc;
338
339 QETH_CARD_TEXT_(card, 4, "aid:%d", vid);
340 if (!vid)
341 return 0;
342 if (card->info.type == QETH_CARD_TYPE_OSM) {
343 QETH_CARD_TEXT(card, 3, "aidOSM");
344 return 0;
345 }
346 if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
347 QETH_CARD_TEXT(card, 3, "aidREC");
348 return 0;
349 }
350 id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
351 if (id) {
352 id->vid = vid;
353 rc = qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
354 if (rc) {
355 kfree(id);
356 return rc;
357 }
358 spin_lock_bh(&card->vlanlock);
359 list_add_tail(&id->list, &card->vid_list);
360 spin_unlock_bh(&card->vlanlock);
361 } else {
362 return -ENOMEM;
363 }
364 return 0;
365 }
366
367 static int qeth_l2_vlan_rx_kill_vid(struct net_device *dev,
368 __be16 proto, u16 vid)
369 {
370 struct qeth_vlan_vid *id, *tmpid = NULL;
371 struct qeth_card *card = dev->ml_priv;
372 int rc = 0;
373
374 QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
375 if (card->info.type == QETH_CARD_TYPE_OSM) {
376 QETH_CARD_TEXT(card, 3, "kidOSM");
377 return 0;
378 }
379 if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
380 QETH_CARD_TEXT(card, 3, "kidREC");
381 return 0;
382 }
383 spin_lock_bh(&card->vlanlock);
384 list_for_each_entry(id, &card->vid_list, list) {
385 if (id->vid == vid) {
386 list_del(&id->list);
387 tmpid = id;
388 break;
389 }
390 }
391 spin_unlock_bh(&card->vlanlock);
392 if (tmpid) {
393 rc = qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
394 kfree(tmpid);
395 }
396 qeth_l2_set_rx_mode(card->dev);
397 return rc;
398 }
399
400 static void qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
401 {
402 QETH_DBF_TEXT(SETUP , 2, "stopcard");
403 QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
404
405 qeth_set_allowed_threads(card, 0, 1);
406 if (card->read.state == CH_STATE_UP &&
407 card->write.state == CH_STATE_UP &&
408 (card->state == CARD_STATE_UP)) {
409 if (recovery_mode &&
410 card->info.type != QETH_CARD_TYPE_OSN) {
411 qeth_l2_stop(card->dev);
412 } else {
413 rtnl_lock();
414 dev_close(card->dev);
415 rtnl_unlock();
416 }
417 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
418 card->state = CARD_STATE_SOFTSETUP;
419 }
420 if (card->state == CARD_STATE_SOFTSETUP) {
421 qeth_l2_del_all_macs(card);
422 qeth_clear_ipacmd_list(card);
423 card->state = CARD_STATE_HARDSETUP;
424 }
425 if (card->state == CARD_STATE_HARDSETUP) {
426 qeth_qdio_clear_card(card, 0);
427 qeth_clear_qdio_buffers(card);
428 qeth_clear_working_pool_list(card);
429 card->state = CARD_STATE_DOWN;
430 }
431 if (card->state == CARD_STATE_DOWN) {
432 qeth_clear_cmd_buffers(&card->read);
433 qeth_clear_cmd_buffers(&card->write);
434 }
435 }
436
437 static int qeth_l2_process_inbound_buffer(struct qeth_card *card,
438 int budget, int *done)
439 {
440 int work_done = 0;
441 struct sk_buff *skb;
442 struct qeth_hdr *hdr;
443 unsigned int len;
444
445 *done = 0;
446 WARN_ON_ONCE(!budget);
447 while (budget) {
448 skb = qeth_core_get_next_skb(card,
449 &card->qdio.in_q->bufs[card->rx.b_index],
450 &card->rx.b_element, &card->rx.e_offset, &hdr);
451 if (!skb) {
452 *done = 1;
453 break;
454 }
455 skb->dev = card->dev;
456 switch (hdr->hdr.l2.id) {
457 case QETH_HEADER_TYPE_LAYER2:
458 skb->pkt_type = PACKET_HOST;
459 skb->protocol = eth_type_trans(skb, skb->dev);
460 if ((card->dev->features & NETIF_F_RXCSUM)
461 && ((hdr->hdr.l2.flags[1] &
462 (QETH_HDR_EXT_CSUM_HDR_REQ |
463 QETH_HDR_EXT_CSUM_TRANSP_REQ)) ==
464 (QETH_HDR_EXT_CSUM_HDR_REQ |
465 QETH_HDR_EXT_CSUM_TRANSP_REQ)))
466 skb->ip_summed = CHECKSUM_UNNECESSARY;
467 else
468 skb->ip_summed = CHECKSUM_NONE;
469 if (skb->protocol == htons(ETH_P_802_2))
470 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
471 len = skb->len;
472 napi_gro_receive(&card->napi, skb);
473 break;
474 case QETH_HEADER_TYPE_OSN:
475 if (card->info.type == QETH_CARD_TYPE_OSN) {
476 skb_push(skb, sizeof(struct qeth_hdr));
477 skb_copy_to_linear_data(skb, hdr,
478 sizeof(struct qeth_hdr));
479 len = skb->len;
480 card->osn_info.data_cb(skb);
481 break;
482 }
483 /* else unknown */
484 default:
485 dev_kfree_skb_any(skb);
486 QETH_CARD_TEXT(card, 3, "inbunkno");
487 QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
488 continue;
489 }
490 work_done++;
491 budget--;
492 card->stats.rx_packets++;
493 card->stats.rx_bytes += len;
494 }
495 return work_done;
496 }
497
498 static int qeth_l2_request_initial_mac(struct qeth_card *card)
499 {
500 int rc = 0;
501 char vendor_pre[] = {0x02, 0x00, 0x00};
502
503 QETH_DBF_TEXT(SETUP, 2, "l2reqmac");
504 QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
505
506 if (MACHINE_IS_VM) {
507 rc = qeth_vm_request_mac(card);
508 if (!rc)
509 goto out;
510 QETH_DBF_MESSAGE(2, "z/VM MAC Service failed on device %s: x%x\n",
511 CARD_BUS_ID(card), rc);
512 QETH_DBF_TEXT_(SETUP, 2, "err%04x", rc);
513 /* fall back to alternative mechanism: */
514 }
515
516 if (card->info.type == QETH_CARD_TYPE_IQD ||
517 card->info.type == QETH_CARD_TYPE_OSM ||
518 card->info.type == QETH_CARD_TYPE_OSX ||
519 card->info.guestlan) {
520 rc = qeth_setadpparms_change_macaddr(card);
521 if (rc) {
522 QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
523 "device %s: x%x\n", CARD_BUS_ID(card), rc);
524 QETH_DBF_TEXT_(SETUP, 2, "1err%04x", rc);
525 return rc;
526 }
527 } else {
528 eth_random_addr(card->dev->dev_addr);
529 memcpy(card->dev->dev_addr, vendor_pre, 3);
530 }
531 out:
532 QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, card->dev->addr_len);
533 return 0;
534 }
535
536 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
537 {
538 struct sockaddr *addr = p;
539 struct qeth_card *card = dev->ml_priv;
540 int rc = 0;
541
542 QETH_CARD_TEXT(card, 3, "setmac");
543
544 if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
545 QETH_CARD_TEXT(card, 3, "setmcINV");
546 return -EOPNOTSUPP;
547 }
548
549 if (card->info.type == QETH_CARD_TYPE_OSN ||
550 card->info.type == QETH_CARD_TYPE_OSM ||
551 card->info.type == QETH_CARD_TYPE_OSX) {
552 QETH_CARD_TEXT(card, 3, "setmcTYP");
553 return -EOPNOTSUPP;
554 }
555 QETH_CARD_HEX(card, 3, addr->sa_data, OSA_ADDR_LEN);
556 if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
557 QETH_CARD_TEXT(card, 3, "setmcREC");
558 return -ERESTARTSYS;
559 }
560 rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
561 if (!rc || (rc == -ENOENT))
562 rc = qeth_l2_send_setmac(card, addr->sa_data);
563 return rc ? -EINVAL : 0;
564 }
565
566 static void qeth_promisc_to_bridge(struct qeth_card *card)
567 {
568 struct net_device *dev = card->dev;
569 enum qeth_ipa_promisc_modes promisc_mode;
570 int role;
571 int rc;
572
573 QETH_CARD_TEXT(card, 3, "pmisc2br");
574
575 if (!card->options.sbp.reflect_promisc)
576 return;
577 promisc_mode = (dev->flags & IFF_PROMISC) ? SET_PROMISC_MODE_ON
578 : SET_PROMISC_MODE_OFF;
579 if (promisc_mode == card->info.promisc_mode)
580 return;
581
582 if (promisc_mode == SET_PROMISC_MODE_ON) {
583 if (card->options.sbp.reflect_promisc_primary)
584 role = QETH_SBP_ROLE_PRIMARY;
585 else
586 role = QETH_SBP_ROLE_SECONDARY;
587 } else
588 role = QETH_SBP_ROLE_NONE;
589
590 rc = qeth_bridgeport_setrole(card, role);
591 QETH_DBF_TEXT_(SETUP, 2, "bpm%c%04x",
592 (promisc_mode == SET_PROMISC_MODE_ON) ? '+' : '-', rc);
593 if (!rc) {
594 card->options.sbp.role = role;
595 card->info.promisc_mode = promisc_mode;
596 }
597
598 }
599 /* New MAC address is added to the hash table and marked to be written on card
600 * only if there is not in the hash table storage already
601 *
602 */
603 static void qeth_l2_add_mac(struct qeth_card *card, struct netdev_hw_addr *ha,
604 u8 is_uc)
605 {
606 u32 mac_hash = get_unaligned((u32 *)(&ha->addr[2]));
607 struct qeth_mac *mac;
608
609 hash_for_each_possible(card->mac_htable, mac, hnode, mac_hash) {
610 if (is_uc == mac->is_uc &&
611 !memcmp(ha->addr, mac->mac_addr, OSA_ADDR_LEN)) {
612 mac->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
613 return;
614 }
615 }
616
617 mac = kzalloc(sizeof(struct qeth_mac), GFP_ATOMIC);
618
619 if (!mac)
620 return;
621
622 memcpy(mac->mac_addr, ha->addr, OSA_ADDR_LEN);
623 mac->is_uc = is_uc;
624 mac->disp_flag = QETH_DISP_ADDR_ADD;
625
626 hash_add(card->mac_htable, &mac->hnode, mac_hash);
627 }
628
629 static void qeth_l2_set_rx_mode(struct net_device *dev)
630 {
631 struct qeth_card *card = dev->ml_priv;
632 struct netdev_hw_addr *ha;
633 struct qeth_mac *mac;
634 struct hlist_node *tmp;
635 int i;
636 int rc;
637
638 if (card->info.type == QETH_CARD_TYPE_OSN)
639 return;
640
641 QETH_CARD_TEXT(card, 3, "setmulti");
642 if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
643 (card->state != CARD_STATE_UP))
644 return;
645
646 spin_lock_bh(&card->mclock);
647
648 netdev_for_each_mc_addr(ha, dev)
649 qeth_l2_add_mac(card, ha, 0);
650
651 netdev_for_each_uc_addr(ha, dev)
652 qeth_l2_add_mac(card, ha, 1);
653
654 hash_for_each_safe(card->mac_htable, i, tmp, mac, hnode) {
655 if (mac->disp_flag == QETH_DISP_ADDR_DELETE) {
656 qeth_l2_remove_mac(card, mac);
657 hash_del(&mac->hnode);
658 kfree(mac);
659
660 } else if (mac->disp_flag == QETH_DISP_ADDR_ADD) {
661 rc = qeth_l2_write_mac(card, mac);
662 if (rc) {
663 hash_del(&mac->hnode);
664 kfree(mac);
665 } else
666 mac->disp_flag = QETH_DISP_ADDR_DELETE;
667 } else
668 mac->disp_flag = QETH_DISP_ADDR_DELETE;
669 }
670
671 spin_unlock_bh(&card->mclock);
672
673 if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
674 qeth_setadp_promisc_mode(card);
675 else
676 qeth_promisc_to_bridge(card);
677 }
678
679 static int qeth_l2_xmit_iqd(struct qeth_card *card, struct sk_buff *skb,
680 struct qeth_qdio_out_q *queue, int cast_type)
681 {
682 unsigned int data_offset = ETH_HLEN;
683 struct qeth_hdr *hdr;
684 int rc;
685
686 hdr = kmem_cache_alloc(qeth_core_header_cache, GFP_ATOMIC);
687 if (!hdr)
688 return -ENOMEM;
689 qeth_l2_fill_header(hdr, skb, cast_type, skb->len);
690 skb_copy_from_linear_data(skb, ((char *)hdr) + sizeof(*hdr),
691 data_offset);
692
693 if (!qeth_get_elements_no(card, skb, 1, data_offset)) {
694 rc = -E2BIG;
695 goto out;
696 }
697 rc = qeth_do_send_packet_fast(card, queue, skb, hdr, data_offset,
698 sizeof(*hdr) + data_offset);
699 out:
700 if (rc)
701 kmem_cache_free(qeth_core_header_cache, hdr);
702 return rc;
703 }
704
705 static int qeth_l2_xmit_osa(struct qeth_card *card, struct sk_buff *skb,
706 struct qeth_qdio_out_q *queue, int cast_type)
707 {
708 int push_len = sizeof(struct qeth_hdr);
709 unsigned int elements, nr_frags;
710 unsigned int hdr_elements = 0;
711 struct qeth_hdr *hdr = NULL;
712 unsigned int hd_len = 0;
713 int rc;
714
715 /* fix hardware limitation: as long as we do not have sbal
716 * chaining we can not send long frag lists
717 */
718 if (!qeth_get_elements_no(card, skb, 0, 0)) {
719 rc = skb_linearize(skb);
720
721 if (card->options.performance_stats) {
722 if (rc)
723 card->perf_stats.tx_linfail++;
724 else
725 card->perf_stats.tx_lin++;
726 }
727 if (rc)
728 return rc;
729 }
730 nr_frags = skb_shinfo(skb)->nr_frags;
731
732 rc = skb_cow_head(skb, push_len);
733 if (rc)
734 return rc;
735 push_len = qeth_push_hdr(skb, &hdr, push_len);
736 if (push_len < 0)
737 return push_len;
738 if (!push_len) {
739 /* hdr was allocated from cache */
740 hd_len = sizeof(*hdr);
741 hdr_elements = 1;
742 }
743 qeth_l2_fill_header(hdr, skb, cast_type, skb->len - push_len);
744 if (skb->ip_summed == CHECKSUM_PARTIAL)
745 qeth_l2_hdr_csum(card, hdr, skb);
746
747 elements = qeth_get_elements_no(card, skb, hdr_elements, 0);
748 if (!elements) {
749 rc = -E2BIG;
750 goto out;
751 }
752 elements += hdr_elements;
753
754 /* TODO: remove the skb_orphan() once TX completion is fast enough */
755 skb_orphan(skb);
756 rc = qeth_do_send_packet(card, queue, skb, hdr, 0, hd_len, elements);
757 out:
758 if (!rc) {
759 if (card->options.performance_stats && nr_frags) {
760 card->perf_stats.sg_skbs_sent++;
761 /* nr_frags + skb->data */
762 card->perf_stats.sg_frags_sent += nr_frags + 1;
763 }
764 } else {
765 if (hd_len)
766 kmem_cache_free(qeth_core_header_cache, hdr);
767 if (rc == -EBUSY)
768 /* roll back to ETH header */
769 skb_pull(skb, push_len);
770 }
771 return rc;
772 }
773
774 static int qeth_l2_xmit_osn(struct qeth_card *card, struct sk_buff *skb,
775 struct qeth_qdio_out_q *queue)
776 {
777 unsigned int elements;
778 struct qeth_hdr *hdr;
779
780 if (skb->protocol == htons(ETH_P_IPV6))
781 return -EPROTONOSUPPORT;
782
783 hdr = (struct qeth_hdr *)skb->data;
784 elements = qeth_get_elements_no(card, skb, 0, 0);
785 if (!elements)
786 return -E2BIG;
787 if (qeth_hdr_chk_and_bounce(skb, &hdr, sizeof(*hdr)))
788 return -EINVAL;
789 return qeth_do_send_packet(card, queue, skb, hdr, 0, 0, elements);
790 }
791
792 static netdev_tx_t qeth_l2_hard_start_xmit(struct sk_buff *skb,
793 struct net_device *dev)
794 {
795 struct qeth_card *card = dev->ml_priv;
796 int cast_type = qeth_l2_get_cast_type(card, skb);
797 struct qeth_qdio_out_q *queue;
798 int tx_bytes = skb->len;
799 int rc;
800
801 if (card->qdio.do_prio_queueing || (cast_type &&
802 card->info.is_multicast_different))
803 queue = card->qdio.out_qs[qeth_get_priority_queue(card, skb,
804 qeth_get_ip_version(skb), cast_type)];
805 else
806 queue = card->qdio.out_qs[card->qdio.default_out_queue];
807
808 if ((card->state != CARD_STATE_UP) || !card->lan_online) {
809 card->stats.tx_carrier_errors++;
810 goto tx_drop;
811 }
812
813 if (card->options.performance_stats) {
814 card->perf_stats.outbound_cnt++;
815 card->perf_stats.outbound_start_time = qeth_get_micros();
816 }
817 netif_stop_queue(dev);
818
819 switch (card->info.type) {
820 case QETH_CARD_TYPE_OSN:
821 rc = qeth_l2_xmit_osn(card, skb, queue);
822 break;
823 case QETH_CARD_TYPE_IQD:
824 rc = qeth_l2_xmit_iqd(card, skb, queue, cast_type);
825 break;
826 default:
827 rc = qeth_l2_xmit_osa(card, skb, queue, cast_type);
828 }
829
830 if (!rc) {
831 card->stats.tx_packets++;
832 card->stats.tx_bytes += tx_bytes;
833 if (card->options.performance_stats)
834 card->perf_stats.outbound_time += qeth_get_micros() -
835 card->perf_stats.outbound_start_time;
836 netif_wake_queue(dev);
837 return NETDEV_TX_OK;
838 } else if (rc == -EBUSY) {
839 return NETDEV_TX_BUSY;
840 } /* else fall through */
841
842 tx_drop:
843 card->stats.tx_dropped++;
844 card->stats.tx_errors++;
845 dev_kfree_skb_any(skb);
846 netif_wake_queue(dev);
847 return NETDEV_TX_OK;
848 }
849
850 static int __qeth_l2_open(struct net_device *dev)
851 {
852 struct qeth_card *card = dev->ml_priv;
853 int rc = 0;
854
855 QETH_CARD_TEXT(card, 4, "qethopen");
856 if (card->state == CARD_STATE_UP)
857 return rc;
858 if (card->state != CARD_STATE_SOFTSETUP)
859 return -ENODEV;
860
861 if ((card->info.type != QETH_CARD_TYPE_OSN) &&
862 (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
863 QETH_CARD_TEXT(card, 4, "nomacadr");
864 return -EPERM;
865 }
866 card->data.state = CH_STATE_UP;
867 card->state = CARD_STATE_UP;
868 netif_start_queue(dev);
869
870 if (qdio_stop_irq(card->data.ccwdev, 0) >= 0) {
871 napi_enable(&card->napi);
872 napi_schedule(&card->napi);
873 } else
874 rc = -EIO;
875 return rc;
876 }
877
878 static int qeth_l2_open(struct net_device *dev)
879 {
880 struct qeth_card *card = dev->ml_priv;
881
882 QETH_CARD_TEXT(card, 5, "qethope_");
883 if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
884 QETH_CARD_TEXT(card, 3, "openREC");
885 return -ERESTARTSYS;
886 }
887 return __qeth_l2_open(dev);
888 }
889
890 static int qeth_l2_stop(struct net_device *dev)
891 {
892 struct qeth_card *card = dev->ml_priv;
893
894 QETH_CARD_TEXT(card, 4, "qethstop");
895 netif_tx_disable(dev);
896 if (card->state == CARD_STATE_UP) {
897 card->state = CARD_STATE_SOFTSETUP;
898 napi_disable(&card->napi);
899 }
900 return 0;
901 }
902
903 static const struct device_type qeth_l2_devtype = {
904 .name = "qeth_layer2",
905 .groups = qeth_l2_attr_groups,
906 };
907
908 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
909 {
910 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
911 int rc;
912
913 if (gdev->dev.type == &qeth_generic_devtype) {
914 rc = qeth_l2_create_device_attributes(&gdev->dev);
915 if (rc)
916 return rc;
917 }
918 INIT_LIST_HEAD(&card->vid_list);
919 hash_init(card->mac_htable);
920 card->options.layer2 = 1;
921 card->info.hwtrap = 0;
922 return 0;
923 }
924
925 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
926 {
927 struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
928
929 if (cgdev->dev.type == &qeth_generic_devtype)
930 qeth_l2_remove_device_attributes(&cgdev->dev);
931 qeth_set_allowed_threads(card, 0, 1);
932 wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
933
934 if (cgdev->state == CCWGROUP_ONLINE)
935 qeth_l2_set_offline(cgdev);
936
937 if (card->dev) {
938 netif_napi_del(&card->napi);
939 unregister_netdev(card->dev);
940 card->dev = NULL;
941 }
942 return;
943 }
944
945 static const struct ethtool_ops qeth_l2_ethtool_ops = {
946 .get_link = ethtool_op_get_link,
947 .get_strings = qeth_core_get_strings,
948 .get_ethtool_stats = qeth_core_get_ethtool_stats,
949 .get_sset_count = qeth_core_get_sset_count,
950 .get_drvinfo = qeth_core_get_drvinfo,
951 .get_link_ksettings = qeth_core_ethtool_get_link_ksettings,
952 };
953
954 static const struct ethtool_ops qeth_l2_osn_ops = {
955 .get_strings = qeth_core_get_strings,
956 .get_ethtool_stats = qeth_core_get_ethtool_stats,
957 .get_sset_count = qeth_core_get_sset_count,
958 .get_drvinfo = qeth_core_get_drvinfo,
959 };
960
961 static const struct net_device_ops qeth_l2_netdev_ops = {
962 .ndo_open = qeth_l2_open,
963 .ndo_stop = qeth_l2_stop,
964 .ndo_get_stats = qeth_get_stats,
965 .ndo_start_xmit = qeth_l2_hard_start_xmit,
966 .ndo_validate_addr = eth_validate_addr,
967 .ndo_set_rx_mode = qeth_l2_set_rx_mode,
968 .ndo_do_ioctl = qeth_do_ioctl,
969 .ndo_set_mac_address = qeth_l2_set_mac_address,
970 .ndo_change_mtu = qeth_change_mtu,
971 .ndo_vlan_rx_add_vid = qeth_l2_vlan_rx_add_vid,
972 .ndo_vlan_rx_kill_vid = qeth_l2_vlan_rx_kill_vid,
973 .ndo_tx_timeout = qeth_tx_timeout,
974 .ndo_fix_features = qeth_fix_features,
975 .ndo_set_features = qeth_set_features
976 };
977
978 static int qeth_l2_setup_netdev(struct qeth_card *card)
979 {
980 switch (card->info.type) {
981 case QETH_CARD_TYPE_IQD:
982 card->dev = alloc_netdev(0, "hsi%d", NET_NAME_UNKNOWN,
983 ether_setup);
984 break;
985 case QETH_CARD_TYPE_OSN:
986 card->dev = alloc_netdev(0, "osn%d", NET_NAME_UNKNOWN,
987 ether_setup);
988 break;
989 default:
990 card->dev = alloc_etherdev(0);
991 }
992
993 if (!card->dev)
994 return -ENODEV;
995
996 card->dev->ml_priv = card;
997 card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
998 card->dev->mtu = card->info.initial_mtu;
999 card->dev->min_mtu = 64;
1000 card->dev->max_mtu = ETH_MAX_MTU;
1001 card->dev->netdev_ops = &qeth_l2_netdev_ops;
1002 if (card->info.type == QETH_CARD_TYPE_OSN) {
1003 card->dev->ethtool_ops = &qeth_l2_osn_ops;
1004 card->dev->flags |= IFF_NOARP;
1005 } else {
1006 card->dev->ethtool_ops = &qeth_l2_ethtool_ops;
1007 }
1008 card->dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
1009 if (card->info.type == QETH_CARD_TYPE_OSD && !card->info.guestlan) {
1010 card->dev->hw_features = NETIF_F_SG;
1011 card->dev->vlan_features = NETIF_F_SG;
1012 /* OSA 3S and earlier has no RX/TX support */
1013 if (qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM)) {
1014 card->dev->hw_features |= NETIF_F_IP_CSUM;
1015 card->dev->vlan_features |= NETIF_F_IP_CSUM;
1016 }
1017 if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM)) {
1018 card->dev->hw_features |= NETIF_F_RXCSUM;
1019 card->dev->vlan_features |= NETIF_F_RXCSUM;
1020 }
1021 }
1022 if (card->info.type != QETH_CARD_TYPE_OSN &&
1023 card->info.type != QETH_CARD_TYPE_IQD) {
1024 card->dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1025 card->dev->needed_headroom = sizeof(struct qeth_hdr);
1026 }
1027
1028 card->info.broadcast_capable = 1;
1029 qeth_l2_request_initial_mac(card);
1030 card->dev->gso_max_size = (QETH_MAX_BUFFER_ELEMENTS(card) - 1) *
1031 PAGE_SIZE;
1032 SET_NETDEV_DEV(card->dev, &card->gdev->dev);
1033 netif_napi_add(card->dev, &card->napi, qeth_poll, QETH_NAPI_WEIGHT);
1034 netif_carrier_off(card->dev);
1035 return register_netdev(card->dev);
1036 }
1037
1038 static int qeth_l2_start_ipassists(struct qeth_card *card)
1039 {
1040 /* configure isolation level */
1041 if (qeth_set_access_ctrl_online(card, 0))
1042 return -ENODEV;
1043 return 0;
1044 }
1045
1046 static void qeth_l2_trace_features(struct qeth_card *card)
1047 {
1048 QETH_CARD_TEXT(card, 2, "l2featur");
1049 QETH_CARD_HEX(card, 2, &card->options.sbp.supported_funcs,
1050 sizeof(card->options.sbp.supported_funcs));
1051 }
1052
1053 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
1054 {
1055 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1056 int rc = 0;
1057 enum qeth_card_states recover_flag;
1058
1059 mutex_lock(&card->discipline_mutex);
1060 mutex_lock(&card->conf_mutex);
1061 QETH_DBF_TEXT(SETUP, 2, "setonlin");
1062 QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1063
1064 recover_flag = card->state;
1065 rc = qeth_core_hardsetup_card(card);
1066 if (rc) {
1067 QETH_DBF_TEXT_(SETUP, 2, "2err%04x", rc);
1068 rc = -ENODEV;
1069 goto out_remove;
1070 }
1071 qeth_bridgeport_query_support(card);
1072 if (card->options.sbp.supported_funcs)
1073 dev_info(&card->gdev->dev,
1074 "The device represents a Bridge Capable Port\n");
1075 qeth_trace_features(card);
1076 qeth_l2_trace_features(card);
1077
1078 if (!card->dev && qeth_l2_setup_netdev(card)) {
1079 rc = -ENODEV;
1080 goto out_remove;
1081 }
1082
1083 if (card->info.type != QETH_CARD_TYPE_OSN)
1084 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
1085
1086 if (qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP)) {
1087 if (card->info.hwtrap &&
1088 qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM))
1089 card->info.hwtrap = 0;
1090 } else
1091 card->info.hwtrap = 0;
1092
1093 qeth_l2_setup_bridgeport_attrs(card);
1094
1095 card->state = CARD_STATE_HARDSETUP;
1096 memset(&card->rx, 0, sizeof(struct qeth_rx));
1097 qeth_print_status_message(card);
1098
1099 /* softsetup */
1100 QETH_DBF_TEXT(SETUP, 2, "softsetp");
1101
1102 if ((card->info.type == QETH_CARD_TYPE_OSD) ||
1103 (card->info.type == QETH_CARD_TYPE_OSX)) {
1104 rc = qeth_l2_start_ipassists(card);
1105 if (rc)
1106 goto out_remove;
1107 }
1108
1109 if (card->info.type != QETH_CARD_TYPE_OSN &&
1110 card->info.type != QETH_CARD_TYPE_OSM)
1111 qeth_l2_process_vlans(card);
1112
1113 netif_tx_disable(card->dev);
1114
1115 rc = qeth_init_qdio_queues(card);
1116 if (rc) {
1117 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1118 rc = -ENODEV;
1119 goto out_remove;
1120 }
1121 card->state = CARD_STATE_SOFTSETUP;
1122 if (card->lan_online)
1123 netif_carrier_on(card->dev);
1124 else
1125 netif_carrier_off(card->dev);
1126
1127 qeth_set_allowed_threads(card, 0xffffffff, 0);
1128 if (recover_flag == CARD_STATE_RECOVER) {
1129 if (recovery_mode &&
1130 card->info.type != QETH_CARD_TYPE_OSN) {
1131 __qeth_l2_open(card->dev);
1132 } else {
1133 rtnl_lock();
1134 dev_open(card->dev);
1135 rtnl_unlock();
1136 }
1137 /* this also sets saved unicast addresses */
1138 qeth_l2_set_rx_mode(card->dev);
1139 rtnl_lock();
1140 qeth_recover_features(card->dev);
1141 rtnl_unlock();
1142 }
1143 /* let user_space know that device is online */
1144 kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1145 mutex_unlock(&card->conf_mutex);
1146 mutex_unlock(&card->discipline_mutex);
1147 return 0;
1148
1149 out_remove:
1150 qeth_l2_stop_card(card, 0);
1151 ccw_device_set_offline(CARD_DDEV(card));
1152 ccw_device_set_offline(CARD_WDEV(card));
1153 ccw_device_set_offline(CARD_RDEV(card));
1154 qdio_free(CARD_DDEV(card));
1155 if (recover_flag == CARD_STATE_RECOVER)
1156 card->state = CARD_STATE_RECOVER;
1157 else
1158 card->state = CARD_STATE_DOWN;
1159 mutex_unlock(&card->conf_mutex);
1160 mutex_unlock(&card->discipline_mutex);
1161 return rc;
1162 }
1163
1164 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1165 {
1166 return __qeth_l2_set_online(gdev, 0);
1167 }
1168
1169 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1170 int recovery_mode)
1171 {
1172 struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1173 int rc = 0, rc2 = 0, rc3 = 0;
1174 enum qeth_card_states recover_flag;
1175
1176 mutex_lock(&card->discipline_mutex);
1177 mutex_lock(&card->conf_mutex);
1178 QETH_DBF_TEXT(SETUP, 3, "setoffl");
1179 QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1180
1181 if (card->dev && netif_carrier_ok(card->dev))
1182 netif_carrier_off(card->dev);
1183 recover_flag = card->state;
1184 if ((!recovery_mode && card->info.hwtrap) || card->info.hwtrap == 2) {
1185 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1186 card->info.hwtrap = 1;
1187 }
1188 qeth_l2_stop_card(card, recovery_mode);
1189 rc = ccw_device_set_offline(CARD_DDEV(card));
1190 rc2 = ccw_device_set_offline(CARD_WDEV(card));
1191 rc3 = ccw_device_set_offline(CARD_RDEV(card));
1192 if (!rc)
1193 rc = (rc2) ? rc2 : rc3;
1194 if (rc)
1195 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1196 qdio_free(CARD_DDEV(card));
1197 if (recover_flag == CARD_STATE_UP)
1198 card->state = CARD_STATE_RECOVER;
1199 /* let user_space know that device is offline */
1200 kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1201 mutex_unlock(&card->conf_mutex);
1202 mutex_unlock(&card->discipline_mutex);
1203 return 0;
1204 }
1205
1206 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1207 {
1208 return __qeth_l2_set_offline(cgdev, 0);
1209 }
1210
1211 static int qeth_l2_recover(void *ptr)
1212 {
1213 struct qeth_card *card;
1214 int rc = 0;
1215
1216 card = (struct qeth_card *) ptr;
1217 QETH_CARD_TEXT(card, 2, "recover1");
1218 if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1219 return 0;
1220 QETH_CARD_TEXT(card, 2, "recover2");
1221 dev_warn(&card->gdev->dev,
1222 "A recovery process has been started for the device\n");
1223 qeth_set_recovery_task(card);
1224 __qeth_l2_set_offline(card->gdev, 1);
1225 rc = __qeth_l2_set_online(card->gdev, 1);
1226 if (!rc)
1227 dev_info(&card->gdev->dev,
1228 "Device successfully recovered!\n");
1229 else {
1230 qeth_close_dev(card);
1231 dev_warn(&card->gdev->dev, "The qeth device driver "
1232 "failed to recover an error on the device\n");
1233 }
1234 qeth_clear_recovery_task(card);
1235 qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1236 qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1237 return 0;
1238 }
1239
1240 static int __init qeth_l2_init(void)
1241 {
1242 pr_info("register layer 2 discipline\n");
1243 return 0;
1244 }
1245
1246 static void __exit qeth_l2_exit(void)
1247 {
1248 pr_info("unregister layer 2 discipline\n");
1249 }
1250
1251 static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev)
1252 {
1253 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1254
1255 if (card->dev)
1256 netif_device_detach(card->dev);
1257 qeth_set_allowed_threads(card, 0, 1);
1258 wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1259 if (gdev->state == CCWGROUP_OFFLINE)
1260 return 0;
1261 if (card->state == CARD_STATE_UP) {
1262 if (card->info.hwtrap)
1263 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1264 __qeth_l2_set_offline(card->gdev, 1);
1265 } else
1266 __qeth_l2_set_offline(card->gdev, 0);
1267 return 0;
1268 }
1269
1270 static int qeth_l2_pm_resume(struct ccwgroup_device *gdev)
1271 {
1272 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1273 int rc = 0;
1274
1275 if (gdev->state == CCWGROUP_OFFLINE)
1276 goto out;
1277
1278 if (card->state == CARD_STATE_RECOVER) {
1279 rc = __qeth_l2_set_online(card->gdev, 1);
1280 if (rc) {
1281 rtnl_lock();
1282 dev_close(card->dev);
1283 rtnl_unlock();
1284 }
1285 } else
1286 rc = __qeth_l2_set_online(card->gdev, 0);
1287 out:
1288 qeth_set_allowed_threads(card, 0xffffffff, 0);
1289 if (card->dev)
1290 netif_device_attach(card->dev);
1291 if (rc)
1292 dev_warn(&card->gdev->dev, "The qeth device driver "
1293 "failed to recover an error on the device\n");
1294 return rc;
1295 }
1296
1297 /* Returns zero if the command is successfully "consumed" */
1298 static int qeth_l2_control_event(struct qeth_card *card,
1299 struct qeth_ipa_cmd *cmd)
1300 {
1301 switch (cmd->hdr.command) {
1302 case IPA_CMD_SETBRIDGEPORT_OSA:
1303 case IPA_CMD_SETBRIDGEPORT_IQD:
1304 if (cmd->data.sbp.hdr.command_code ==
1305 IPA_SBP_BRIDGE_PORT_STATE_CHANGE) {
1306 qeth_bridge_state_change(card, cmd);
1307 return 0;
1308 } else
1309 return 1;
1310 case IPA_CMD_ADDRESS_CHANGE_NOTIF:
1311 qeth_bridge_host_event(card, cmd);
1312 return 0;
1313 default:
1314 return 1;
1315 }
1316 }
1317
1318 struct qeth_discipline qeth_l2_discipline = {
1319 .devtype = &qeth_l2_devtype,
1320 .start_poll = qeth_qdio_start_poll,
1321 .input_handler = (qdio_handler_t *) qeth_qdio_input_handler,
1322 .output_handler = (qdio_handler_t *) qeth_qdio_output_handler,
1323 .process_rx_buffer = qeth_l2_process_inbound_buffer,
1324 .recover = qeth_l2_recover,
1325 .setup = qeth_l2_probe_device,
1326 .remove = qeth_l2_remove_device,
1327 .set_online = qeth_l2_set_online,
1328 .set_offline = qeth_l2_set_offline,
1329 .freeze = qeth_l2_pm_suspend,
1330 .thaw = qeth_l2_pm_resume,
1331 .restore = qeth_l2_pm_resume,
1332 .do_ioctl = NULL,
1333 .control_event_handler = qeth_l2_control_event,
1334 };
1335 EXPORT_SYMBOL_GPL(qeth_l2_discipline);
1336
1337 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1338 struct qeth_cmd_buffer *iob)
1339 {
1340 unsigned long flags;
1341 int rc = 0;
1342
1343 QETH_CARD_TEXT(card, 5, "osndctrd");
1344
1345 wait_event(card->wait_q,
1346 atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1347 qeth_prepare_control_data(card, len, iob);
1348 QETH_CARD_TEXT(card, 6, "osnoirqp");
1349 spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1350 rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1351 (addr_t) iob, 0, 0);
1352 spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1353 if (rc) {
1354 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1355 "ccw_device_start rc = %i\n", rc);
1356 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1357 qeth_release_buffer(iob->channel, iob);
1358 atomic_set(&card->write.irq_pending, 0);
1359 wake_up(&card->wait_q);
1360 }
1361 return rc;
1362 }
1363
1364 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1365 struct qeth_cmd_buffer *iob, int data_len)
1366 {
1367 u16 s1, s2;
1368
1369 QETH_CARD_TEXT(card, 4, "osndipa");
1370
1371 qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1372 s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1373 s2 = (u16)data_len;
1374 memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1375 memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1376 memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1377 memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1378 return qeth_osn_send_control_data(card, s1, iob);
1379 }
1380
1381 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1382 {
1383 struct qeth_cmd_buffer *iob;
1384 struct qeth_card *card;
1385 int rc;
1386
1387 if (!dev)
1388 return -ENODEV;
1389 card = dev->ml_priv;
1390 if (!card)
1391 return -ENODEV;
1392 QETH_CARD_TEXT(card, 2, "osnsdmc");
1393 if (!qeth_card_hw_is_reachable(card))
1394 return -ENODEV;
1395 iob = qeth_wait_for_buffer(&card->write);
1396 memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1397 rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1398 return rc;
1399 }
1400 EXPORT_SYMBOL(qeth_osn_assist);
1401
1402 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1403 int (*assist_cb)(struct net_device *, void *),
1404 int (*data_cb)(struct sk_buff *))
1405 {
1406 struct qeth_card *card;
1407
1408 *dev = qeth_l2_netdev_by_devno(read_dev_no);
1409 if (*dev == NULL)
1410 return -ENODEV;
1411 card = (*dev)->ml_priv;
1412 if (!card)
1413 return -ENODEV;
1414 QETH_CARD_TEXT(card, 2, "osnreg");
1415 if ((assist_cb == NULL) || (data_cb == NULL))
1416 return -EINVAL;
1417 card->osn_info.assist_cb = assist_cb;
1418 card->osn_info.data_cb = data_cb;
1419 return 0;
1420 }
1421 EXPORT_SYMBOL(qeth_osn_register);
1422
1423 void qeth_osn_deregister(struct net_device *dev)
1424 {
1425 struct qeth_card *card;
1426
1427 if (!dev)
1428 return;
1429 card = dev->ml_priv;
1430 if (!card)
1431 return;
1432 QETH_CARD_TEXT(card, 2, "osndereg");
1433 card->osn_info.assist_cb = NULL;
1434 card->osn_info.data_cb = NULL;
1435 return;
1436 }
1437 EXPORT_SYMBOL(qeth_osn_deregister);
1438
1439 /* SETBRIDGEPORT support, async notifications */
1440
1441 enum qeth_an_event_type {anev_reg_unreg, anev_abort, anev_reset};
1442
1443 /**
1444 * qeth_bridge_emit_host_event() - bridgeport address change notification
1445 * @card: qeth_card structure pointer, for udev events.
1446 * @evtype: "normal" register/unregister, or abort, or reset. For abort
1447 * and reset token and addr_lnid are unused and may be NULL.
1448 * @code: event bitmask: high order bit 0x80 value 1 means removal of an
1449 * object, 0 - addition of an object.
1450 * 0x01 - VLAN, 0x02 - MAC, 0x03 - VLAN and MAC.
1451 * @token: "network token" structure identifying physical address of the port.
1452 * @addr_lnid: pointer to structure with MAC address and VLAN ID.
1453 *
1454 * This function is called when registrations and deregistrations are
1455 * reported by the hardware, and also when notifications are enabled -
1456 * for all currently registered addresses.
1457 */
1458 static void qeth_bridge_emit_host_event(struct qeth_card *card,
1459 enum qeth_an_event_type evtype,
1460 u8 code, struct net_if_token *token, struct mac_addr_lnid *addr_lnid)
1461 {
1462 char str[7][32];
1463 char *env[8];
1464 int i = 0;
1465
1466 switch (evtype) {
1467 case anev_reg_unreg:
1468 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=%s",
1469 (code & IPA_ADDR_CHANGE_CODE_REMOVAL)
1470 ? "deregister" : "register");
1471 env[i] = str[i]; i++;
1472 if (code & IPA_ADDR_CHANGE_CODE_VLANID) {
1473 snprintf(str[i], sizeof(str[i]), "VLAN=%d",
1474 addr_lnid->lnid);
1475 env[i] = str[i]; i++;
1476 }
1477 if (code & IPA_ADDR_CHANGE_CODE_MACADDR) {
1478 snprintf(str[i], sizeof(str[i]), "MAC=%pM",
1479 addr_lnid->mac);
1480 env[i] = str[i]; i++;
1481 }
1482 snprintf(str[i], sizeof(str[i]), "NTOK_BUSID=%x.%x.%04x",
1483 token->cssid, token->ssid, token->devnum);
1484 env[i] = str[i]; i++;
1485 snprintf(str[i], sizeof(str[i]), "NTOK_IID=%02x", token->iid);
1486 env[i] = str[i]; i++;
1487 snprintf(str[i], sizeof(str[i]), "NTOK_CHPID=%02x",
1488 token->chpid);
1489 env[i] = str[i]; i++;
1490 snprintf(str[i], sizeof(str[i]), "NTOK_CHID=%04x", token->chid);
1491 env[i] = str[i]; i++;
1492 break;
1493 case anev_abort:
1494 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=abort");
1495 env[i] = str[i]; i++;
1496 break;
1497 case anev_reset:
1498 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=reset");
1499 env[i] = str[i]; i++;
1500 break;
1501 }
1502 env[i] = NULL;
1503 kobject_uevent_env(&card->gdev->dev.kobj, KOBJ_CHANGE, env);
1504 }
1505
1506 struct qeth_bridge_state_data {
1507 struct work_struct worker;
1508 struct qeth_card *card;
1509 struct qeth_sbp_state_change qports;
1510 };
1511
1512 static void qeth_bridge_state_change_worker(struct work_struct *work)
1513 {
1514 struct qeth_bridge_state_data *data =
1515 container_of(work, struct qeth_bridge_state_data, worker);
1516 /* We are only interested in the first entry - local port */
1517 struct qeth_sbp_port_entry *entry = &data->qports.entry[0];
1518 char env_locrem[32];
1519 char env_role[32];
1520 char env_state[32];
1521 char *env[] = {
1522 env_locrem,
1523 env_role,
1524 env_state,
1525 NULL
1526 };
1527
1528 /* Role should not change by itself, but if it did, */
1529 /* information from the hardware is authoritative. */
1530 mutex_lock(&data->card->conf_mutex);
1531 data->card->options.sbp.role = entry->role;
1532 mutex_unlock(&data->card->conf_mutex);
1533
1534 snprintf(env_locrem, sizeof(env_locrem), "BRIDGEPORT=statechange");
1535 snprintf(env_role, sizeof(env_role), "ROLE=%s",
1536 (entry->role == QETH_SBP_ROLE_NONE) ? "none" :
1537 (entry->role == QETH_SBP_ROLE_PRIMARY) ? "primary" :
1538 (entry->role == QETH_SBP_ROLE_SECONDARY) ? "secondary" :
1539 "<INVALID>");
1540 snprintf(env_state, sizeof(env_state), "STATE=%s",
1541 (entry->state == QETH_SBP_STATE_INACTIVE) ? "inactive" :
1542 (entry->state == QETH_SBP_STATE_STANDBY) ? "standby" :
1543 (entry->state == QETH_SBP_STATE_ACTIVE) ? "active" :
1544 "<INVALID>");
1545 kobject_uevent_env(&data->card->gdev->dev.kobj,
1546 KOBJ_CHANGE, env);
1547 kfree(data);
1548 }
1549
1550 static void qeth_bridge_state_change(struct qeth_card *card,
1551 struct qeth_ipa_cmd *cmd)
1552 {
1553 struct qeth_sbp_state_change *qports =
1554 &cmd->data.sbp.data.state_change;
1555 struct qeth_bridge_state_data *data;
1556 int extrasize;
1557
1558 QETH_CARD_TEXT(card, 2, "brstchng");
1559 if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1560 QETH_CARD_TEXT_(card, 2, "BPsz%04x", qports->entry_length);
1561 return;
1562 }
1563 extrasize = sizeof(struct qeth_sbp_port_entry) * qports->num_entries;
1564 data = kzalloc(sizeof(struct qeth_bridge_state_data) + extrasize,
1565 GFP_ATOMIC);
1566 if (!data) {
1567 QETH_CARD_TEXT(card, 2, "BPSalloc");
1568 return;
1569 }
1570 INIT_WORK(&data->worker, qeth_bridge_state_change_worker);
1571 data->card = card;
1572 memcpy(&data->qports, qports,
1573 sizeof(struct qeth_sbp_state_change) + extrasize);
1574 queue_work(qeth_wq, &data->worker);
1575 }
1576
1577 struct qeth_bridge_host_data {
1578 struct work_struct worker;
1579 struct qeth_card *card;
1580 struct qeth_ipacmd_addr_change hostevs;
1581 };
1582
1583 static void qeth_bridge_host_event_worker(struct work_struct *work)
1584 {
1585 struct qeth_bridge_host_data *data =
1586 container_of(work, struct qeth_bridge_host_data, worker);
1587 int i;
1588
1589 if (data->hostevs.lost_event_mask) {
1590 dev_info(&data->card->gdev->dev,
1591 "Address notification from the Bridge Port stopped %s (%s)\n",
1592 data->card->dev->name,
1593 (data->hostevs.lost_event_mask == 0x01)
1594 ? "Overflow"
1595 : (data->hostevs.lost_event_mask == 0x02)
1596 ? "Bridge port state change"
1597 : "Unknown reason");
1598 mutex_lock(&data->card->conf_mutex);
1599 data->card->options.sbp.hostnotification = 0;
1600 mutex_unlock(&data->card->conf_mutex);
1601 qeth_bridge_emit_host_event(data->card, anev_abort,
1602 0, NULL, NULL);
1603 } else
1604 for (i = 0; i < data->hostevs.num_entries; i++) {
1605 struct qeth_ipacmd_addr_change_entry *entry =
1606 &data->hostevs.entry[i];
1607 qeth_bridge_emit_host_event(data->card,
1608 anev_reg_unreg,
1609 entry->change_code,
1610 &entry->token, &entry->addr_lnid);
1611 }
1612 kfree(data);
1613 }
1614
1615 static void qeth_bridge_host_event(struct qeth_card *card,
1616 struct qeth_ipa_cmd *cmd)
1617 {
1618 struct qeth_ipacmd_addr_change *hostevs =
1619 &cmd->data.addrchange;
1620 struct qeth_bridge_host_data *data;
1621 int extrasize;
1622
1623 QETH_CARD_TEXT(card, 2, "brhostev");
1624 if (cmd->hdr.return_code != 0x0000) {
1625 if (cmd->hdr.return_code == 0x0010) {
1626 if (hostevs->lost_event_mask == 0x00)
1627 hostevs->lost_event_mask = 0xff;
1628 } else {
1629 QETH_CARD_TEXT_(card, 2, "BPHe%04x",
1630 cmd->hdr.return_code);
1631 return;
1632 }
1633 }
1634 extrasize = sizeof(struct qeth_ipacmd_addr_change_entry) *
1635 hostevs->num_entries;
1636 data = kzalloc(sizeof(struct qeth_bridge_host_data) + extrasize,
1637 GFP_ATOMIC);
1638 if (!data) {
1639 QETH_CARD_TEXT(card, 2, "BPHalloc");
1640 return;
1641 }
1642 INIT_WORK(&data->worker, qeth_bridge_host_event_worker);
1643 data->card = card;
1644 memcpy(&data->hostevs, hostevs,
1645 sizeof(struct qeth_ipacmd_addr_change) + extrasize);
1646 queue_work(qeth_wq, &data->worker);
1647 }
1648
1649 /* SETBRIDGEPORT support; sending commands */
1650
1651 struct _qeth_sbp_cbctl {
1652 u16 ipa_rc;
1653 u16 cmd_rc;
1654 union {
1655 u32 supported;
1656 struct {
1657 enum qeth_sbp_roles *role;
1658 enum qeth_sbp_states *state;
1659 } qports;
1660 } data;
1661 };
1662
1663 /**
1664 * qeth_bridgeport_makerc() - derive "traditional" error from hardware codes.
1665 * @card: qeth_card structure pointer, for debug messages.
1666 * @cbctl: state structure with hardware return codes.
1667 * @setcmd: IPA command code
1668 *
1669 * Returns negative errno-compatible error indication or 0 on success.
1670 */
1671 static int qeth_bridgeport_makerc(struct qeth_card *card,
1672 struct _qeth_sbp_cbctl *cbctl, enum qeth_ipa_sbp_cmd setcmd)
1673 {
1674 int rc;
1675 int is_iqd = (card->info.type == QETH_CARD_TYPE_IQD);
1676
1677 if ((is_iqd && (cbctl->ipa_rc == IPA_RC_SUCCESS)) ||
1678 (!is_iqd && (cbctl->ipa_rc == cbctl->cmd_rc)))
1679 switch (cbctl->cmd_rc) {
1680 case IPA_RC_SUCCESS:
1681 rc = 0;
1682 break;
1683 case IPA_RC_L2_UNSUPPORTED_CMD:
1684 case IPA_RC_UNSUPPORTED_COMMAND:
1685 rc = -EOPNOTSUPP;
1686 break;
1687 case IPA_RC_SBP_OSA_NOT_CONFIGURED:
1688 case IPA_RC_SBP_IQD_NOT_CONFIGURED:
1689 rc = -ENODEV; /* maybe not the best code here? */
1690 dev_err(&card->gdev->dev,
1691 "The device is not configured as a Bridge Port\n");
1692 break;
1693 case IPA_RC_SBP_OSA_OS_MISMATCH:
1694 case IPA_RC_SBP_IQD_OS_MISMATCH:
1695 rc = -EPERM;
1696 dev_err(&card->gdev->dev,
1697 "A Bridge Port is already configured by a different operating system\n");
1698 break;
1699 case IPA_RC_SBP_OSA_ANO_DEV_PRIMARY:
1700 case IPA_RC_SBP_IQD_ANO_DEV_PRIMARY:
1701 switch (setcmd) {
1702 case IPA_SBP_SET_PRIMARY_BRIDGE_PORT:
1703 rc = -EEXIST;
1704 dev_err(&card->gdev->dev,
1705 "The LAN already has a primary Bridge Port\n");
1706 break;
1707 case IPA_SBP_SET_SECONDARY_BRIDGE_PORT:
1708 rc = -EBUSY;
1709 dev_err(&card->gdev->dev,
1710 "The device is already a primary Bridge Port\n");
1711 break;
1712 default:
1713 rc = -EIO;
1714 }
1715 break;
1716 case IPA_RC_SBP_OSA_CURRENT_SECOND:
1717 case IPA_RC_SBP_IQD_CURRENT_SECOND:
1718 rc = -EBUSY;
1719 dev_err(&card->gdev->dev,
1720 "The device is already a secondary Bridge Port\n");
1721 break;
1722 case IPA_RC_SBP_OSA_LIMIT_SECOND:
1723 case IPA_RC_SBP_IQD_LIMIT_SECOND:
1724 rc = -EEXIST;
1725 dev_err(&card->gdev->dev,
1726 "The LAN cannot have more secondary Bridge Ports\n");
1727 break;
1728 case IPA_RC_SBP_OSA_CURRENT_PRIMARY:
1729 case IPA_RC_SBP_IQD_CURRENT_PRIMARY:
1730 rc = -EBUSY;
1731 dev_err(&card->gdev->dev,
1732 "The device is already a primary Bridge Port\n");
1733 break;
1734 case IPA_RC_SBP_OSA_NOT_AUTHD_BY_ZMAN:
1735 case IPA_RC_SBP_IQD_NOT_AUTHD_BY_ZMAN:
1736 rc = -EACCES;
1737 dev_err(&card->gdev->dev,
1738 "The device is not authorized to be a Bridge Port\n");
1739 break;
1740 default:
1741 rc = -EIO;
1742 }
1743 else
1744 switch (cbctl->ipa_rc) {
1745 case IPA_RC_NOTSUPP:
1746 rc = -EOPNOTSUPP;
1747 break;
1748 case IPA_RC_UNSUPPORTED_COMMAND:
1749 rc = -EOPNOTSUPP;
1750 break;
1751 default:
1752 rc = -EIO;
1753 }
1754
1755 if (rc) {
1756 QETH_CARD_TEXT_(card, 2, "SBPi%04x", cbctl->ipa_rc);
1757 QETH_CARD_TEXT_(card, 2, "SBPc%04x", cbctl->cmd_rc);
1758 }
1759 return rc;
1760 }
1761
1762 static struct qeth_cmd_buffer *qeth_sbp_build_cmd(struct qeth_card *card,
1763 enum qeth_ipa_sbp_cmd sbp_cmd,
1764 unsigned int cmd_length)
1765 {
1766 enum qeth_ipa_cmds ipa_cmd = (card->info.type == QETH_CARD_TYPE_IQD) ?
1767 IPA_CMD_SETBRIDGEPORT_IQD :
1768 IPA_CMD_SETBRIDGEPORT_OSA;
1769 struct qeth_cmd_buffer *iob;
1770 struct qeth_ipa_cmd *cmd;
1771
1772 iob = qeth_get_ipacmd_buffer(card, ipa_cmd, 0);
1773 if (!iob)
1774 return iob;
1775 cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
1776 cmd->data.sbp.hdr.cmdlength = sizeof(struct qeth_ipacmd_sbp_hdr) +
1777 cmd_length;
1778 cmd->data.sbp.hdr.command_code = sbp_cmd;
1779 cmd->data.sbp.hdr.used_total = 1;
1780 cmd->data.sbp.hdr.seq_no = 1;
1781 return iob;
1782 }
1783
1784 static int qeth_bridgeport_query_support_cb(struct qeth_card *card,
1785 struct qeth_reply *reply, unsigned long data)
1786 {
1787 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1788 struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1789 QETH_CARD_TEXT(card, 2, "brqsupcb");
1790 cbctl->ipa_rc = cmd->hdr.return_code;
1791 cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1792 if ((cbctl->ipa_rc == 0) && (cbctl->cmd_rc == 0)) {
1793 cbctl->data.supported =
1794 cmd->data.sbp.data.query_cmds_supp.supported_cmds;
1795 } else {
1796 cbctl->data.supported = 0;
1797 }
1798 return 0;
1799 }
1800
1801 /**
1802 * qeth_bridgeport_query_support() - store bitmask of supported subfunctions.
1803 * @card: qeth_card structure pointer.
1804 *
1805 * Sets bitmask of supported setbridgeport subfunctions in the qeth_card
1806 * strucutre: card->options.sbp.supported_funcs.
1807 */
1808 static void qeth_bridgeport_query_support(struct qeth_card *card)
1809 {
1810 struct qeth_cmd_buffer *iob;
1811 struct _qeth_sbp_cbctl cbctl;
1812
1813 QETH_CARD_TEXT(card, 2, "brqsuppo");
1814 iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_COMMANDS_SUPPORTED,
1815 sizeof(struct qeth_sbp_query_cmds_supp));
1816 if (!iob)
1817 return;
1818 if (qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_support_cb,
1819 (void *)&cbctl) ||
1820 qeth_bridgeport_makerc(card, &cbctl,
1821 IPA_SBP_QUERY_COMMANDS_SUPPORTED)) {
1822 /* non-zero makerc signifies failure, and produce messages */
1823 card->options.sbp.role = QETH_SBP_ROLE_NONE;
1824 return;
1825 }
1826 card->options.sbp.supported_funcs = cbctl.data.supported;
1827 }
1828
1829 static int qeth_bridgeport_query_ports_cb(struct qeth_card *card,
1830 struct qeth_reply *reply, unsigned long data)
1831 {
1832 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1833 struct qeth_sbp_query_ports *qports = &cmd->data.sbp.data.query_ports;
1834 struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1835
1836 QETH_CARD_TEXT(card, 2, "brqprtcb");
1837 cbctl->ipa_rc = cmd->hdr.return_code;
1838 cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1839 if ((cbctl->ipa_rc != 0) || (cbctl->cmd_rc != 0))
1840 return 0;
1841 if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1842 cbctl->cmd_rc = 0xffff;
1843 QETH_CARD_TEXT_(card, 2, "SBPs%04x", qports->entry_length);
1844 return 0;
1845 }
1846 /* first entry contains the state of the local port */
1847 if (qports->num_entries > 0) {
1848 if (cbctl->data.qports.role)
1849 *cbctl->data.qports.role = qports->entry[0].role;
1850 if (cbctl->data.qports.state)
1851 *cbctl->data.qports.state = qports->entry[0].state;
1852 }
1853 return 0;
1854 }
1855
1856 /**
1857 * qeth_bridgeport_query_ports() - query local bridgeport status.
1858 * @card: qeth_card structure pointer.
1859 * @role: Role of the port: 0-none, 1-primary, 2-secondary.
1860 * @state: State of the port: 0-inactive, 1-standby, 2-active.
1861 *
1862 * Returns negative errno-compatible error indication or 0 on success.
1863 *
1864 * 'role' and 'state' are not updated in case of hardware operation failure.
1865 */
1866 int qeth_bridgeport_query_ports(struct qeth_card *card,
1867 enum qeth_sbp_roles *role, enum qeth_sbp_states *state)
1868 {
1869 int rc = 0;
1870 struct qeth_cmd_buffer *iob;
1871 struct _qeth_sbp_cbctl cbctl = {
1872 .data = {
1873 .qports = {
1874 .role = role,
1875 .state = state,
1876 },
1877 },
1878 };
1879
1880 QETH_CARD_TEXT(card, 2, "brqports");
1881 if (!(card->options.sbp.supported_funcs & IPA_SBP_QUERY_BRIDGE_PORTS))
1882 return -EOPNOTSUPP;
1883 iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_BRIDGE_PORTS, 0);
1884 if (!iob)
1885 return -ENOMEM;
1886 rc = qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_ports_cb,
1887 (void *)&cbctl);
1888 if (rc < 0)
1889 return rc;
1890 return qeth_bridgeport_makerc(card, &cbctl, IPA_SBP_QUERY_BRIDGE_PORTS);
1891 }
1892 EXPORT_SYMBOL_GPL(qeth_bridgeport_query_ports);
1893
1894 static int qeth_bridgeport_set_cb(struct qeth_card *card,
1895 struct qeth_reply *reply, unsigned long data)
1896 {
1897 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
1898 struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1899 QETH_CARD_TEXT(card, 2, "brsetrcb");
1900 cbctl->ipa_rc = cmd->hdr.return_code;
1901 cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1902 return 0;
1903 }
1904
1905 /**
1906 * qeth_bridgeport_setrole() - Assign primary role to the port.
1907 * @card: qeth_card structure pointer.
1908 * @role: Role to assign.
1909 *
1910 * Returns negative errno-compatible error indication or 0 on success.
1911 */
1912 int qeth_bridgeport_setrole(struct qeth_card *card, enum qeth_sbp_roles role)
1913 {
1914 int rc = 0;
1915 int cmdlength;
1916 struct qeth_cmd_buffer *iob;
1917 struct _qeth_sbp_cbctl cbctl;
1918 enum qeth_ipa_sbp_cmd setcmd;
1919
1920 QETH_CARD_TEXT(card, 2, "brsetrol");
1921 switch (role) {
1922 case QETH_SBP_ROLE_NONE:
1923 setcmd = IPA_SBP_RESET_BRIDGE_PORT_ROLE;
1924 cmdlength = sizeof(struct qeth_sbp_reset_role);
1925 break;
1926 case QETH_SBP_ROLE_PRIMARY:
1927 setcmd = IPA_SBP_SET_PRIMARY_BRIDGE_PORT;
1928 cmdlength = sizeof(struct qeth_sbp_set_primary);
1929 break;
1930 case QETH_SBP_ROLE_SECONDARY:
1931 setcmd = IPA_SBP_SET_SECONDARY_BRIDGE_PORT;
1932 cmdlength = sizeof(struct qeth_sbp_set_secondary);
1933 break;
1934 default:
1935 return -EINVAL;
1936 }
1937 if (!(card->options.sbp.supported_funcs & setcmd))
1938 return -EOPNOTSUPP;
1939 iob = qeth_sbp_build_cmd(card, setcmd, cmdlength);
1940 if (!iob)
1941 return -ENOMEM;
1942 rc = qeth_send_ipa_cmd(card, iob, qeth_bridgeport_set_cb,
1943 (void *)&cbctl);
1944 if (rc < 0)
1945 return rc;
1946 return qeth_bridgeport_makerc(card, &cbctl, setcmd);
1947 }
1948
1949 /**
1950 * qeth_anset_makerc() - derive "traditional" error from hardware codes.
1951 * @card: qeth_card structure pointer, for debug messages.
1952 *
1953 * Returns negative errno-compatible error indication or 0 on success.
1954 */
1955 static int qeth_anset_makerc(struct qeth_card *card, int pnso_rc, u16 response)
1956 {
1957 int rc;
1958
1959 if (pnso_rc == 0)
1960 switch (response) {
1961 case 0x0001:
1962 rc = 0;
1963 break;
1964 case 0x0004:
1965 case 0x0100:
1966 case 0x0106:
1967 rc = -EOPNOTSUPP;
1968 dev_err(&card->gdev->dev,
1969 "Setting address notification failed\n");
1970 break;
1971 case 0x0107:
1972 rc = -EAGAIN;
1973 break;
1974 default:
1975 rc = -EIO;
1976 }
1977 else
1978 rc = -EIO;
1979
1980 if (rc) {
1981 QETH_CARD_TEXT_(card, 2, "SBPp%04x", pnso_rc);
1982 QETH_CARD_TEXT_(card, 2, "SBPr%04x", response);
1983 }
1984 return rc;
1985 }
1986
1987 static void qeth_bridgeport_an_set_cb(void *priv,
1988 enum qdio_brinfo_entry_type type, void *entry)
1989 {
1990 struct qeth_card *card = (struct qeth_card *)priv;
1991 struct qdio_brinfo_entry_l2 *l2entry;
1992 u8 code;
1993
1994 if (type != l2_addr_lnid) {
1995 WARN_ON_ONCE(1);
1996 return;
1997 }
1998
1999 l2entry = (struct qdio_brinfo_entry_l2 *)entry;
2000 code = IPA_ADDR_CHANGE_CODE_MACADDR;
2001 if (l2entry->addr_lnid.lnid)
2002 code |= IPA_ADDR_CHANGE_CODE_VLANID;
2003 qeth_bridge_emit_host_event(card, anev_reg_unreg, code,
2004 (struct net_if_token *)&l2entry->nit,
2005 (struct mac_addr_lnid *)&l2entry->addr_lnid);
2006 }
2007
2008 /**
2009 * qeth_bridgeport_an_set() - Enable or disable bridgeport address notification
2010 * @card: qeth_card structure pointer.
2011 * @enable: 0 - disable, non-zero - enable notifications
2012 *
2013 * Returns negative errno-compatible error indication or 0 on success.
2014 *
2015 * On enable, emits a series of address notifications udev events for all
2016 * currently registered hosts.
2017 */
2018 int qeth_bridgeport_an_set(struct qeth_card *card, int enable)
2019 {
2020 int rc;
2021 u16 response;
2022 struct ccw_device *ddev;
2023 struct subchannel_id schid;
2024
2025 if (!card)
2026 return -EINVAL;
2027 if (!card->options.sbp.supported_funcs)
2028 return -EOPNOTSUPP;
2029 ddev = CARD_DDEV(card);
2030 ccw_device_get_schid(ddev, &schid);
2031
2032 if (enable) {
2033 qeth_bridge_emit_host_event(card, anev_reset, 0, NULL, NULL);
2034 rc = qdio_pnso_brinfo(schid, 1, &response,
2035 qeth_bridgeport_an_set_cb, card);
2036 } else
2037 rc = qdio_pnso_brinfo(schid, 0, &response, NULL, NULL);
2038 return qeth_anset_makerc(card, rc, response);
2039 }
2040 EXPORT_SYMBOL_GPL(qeth_bridgeport_an_set);
2041
2042 module_init(qeth_l2_init);
2043 module_exit(qeth_l2_exit);
2044 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
2045 MODULE_DESCRIPTION("qeth layer 2 discipline");
2046 MODULE_LICENSE("GPL");
Linux with added FPC-III support