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s390: Use eth_random_addr
[deliverable/linux.git] / drivers / s390 / net / qeth_l2_main.c
1 /*
2 * drivers/s390/net/qeth_l2_main.c
3 *
4 * Copyright IBM Corp. 2007, 2009
5 * Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
6 * Frank Pavlic <fpavlic@de.ibm.com>,
7 * Thomas Spatzier <tspat@de.ibm.com>,
8 * Frank Blaschka <frank.blaschka@de.ibm.com>
9 */
10
11 #define KMSG_COMPONENT "qeth"
12 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
13
14 #include <linux/module.h>
15 #include <linux/moduleparam.h>
16 #include <linux/string.h>
17 #include <linux/errno.h>
18 #include <linux/kernel.h>
19 #include <linux/slab.h>
20 #include <linux/etherdevice.h>
21 #include <linux/mii.h>
22 #include <linux/ip.h>
23 #include <linux/list.h>
24
25 #include "qeth_core.h"
26
27 static int qeth_l2_set_offline(struct ccwgroup_device *);
28 static int qeth_l2_stop(struct net_device *);
29 static int qeth_l2_send_delmac(struct qeth_card *, __u8 *);
30 static int qeth_l2_send_setdelmac(struct qeth_card *, __u8 *,
31 enum qeth_ipa_cmds,
32 int (*reply_cb) (struct qeth_card *,
33 struct qeth_reply*,
34 unsigned long));
35 static void qeth_l2_set_multicast_list(struct net_device *);
36 static int qeth_l2_recover(void *);
37
38 static int qeth_l2_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
39 {
40 struct qeth_card *card = dev->ml_priv;
41 struct mii_ioctl_data *mii_data;
42 int rc = 0;
43
44 if (!card)
45 return -ENODEV;
46
47 if ((card->state != CARD_STATE_UP) &&
48 (card->state != CARD_STATE_SOFTSETUP))
49 return -ENODEV;
50
51 if (card->info.type == QETH_CARD_TYPE_OSN)
52 return -EPERM;
53
54 switch (cmd) {
55 case SIOC_QETH_ADP_SET_SNMP_CONTROL:
56 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
57 break;
58 case SIOC_QETH_GET_CARD_TYPE:
59 if ((card->info.type == QETH_CARD_TYPE_OSD ||
60 card->info.type == QETH_CARD_TYPE_OSM ||
61 card->info.type == QETH_CARD_TYPE_OSX) &&
62 !card->info.guestlan)
63 return 1;
64 return 0;
65 break;
66 case SIOCGMIIPHY:
67 mii_data = if_mii(rq);
68 mii_data->phy_id = 0;
69 break;
70 case SIOCGMIIREG:
71 mii_data = if_mii(rq);
72 if (mii_data->phy_id != 0)
73 rc = -EINVAL;
74 else
75 mii_data->val_out = qeth_mdio_read(dev,
76 mii_data->phy_id, mii_data->reg_num);
77 break;
78 case SIOC_QETH_QUERY_OAT:
79 rc = qeth_query_oat_command(card, rq->ifr_ifru.ifru_data);
80 break;
81 default:
82 rc = -EOPNOTSUPP;
83 }
84 if (rc)
85 QETH_CARD_TEXT_(card, 2, "ioce%d", rc);
86 return rc;
87 }
88
89 static int qeth_l2_verify_dev(struct net_device *dev)
90 {
91 struct qeth_card *card;
92 unsigned long flags;
93 int rc = 0;
94
95 read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
96 list_for_each_entry(card, &qeth_core_card_list.list, list) {
97 if (card->dev == dev) {
98 rc = QETH_REAL_CARD;
99 break;
100 }
101 }
102 read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
103
104 return rc;
105 }
106
107 static struct net_device *qeth_l2_netdev_by_devno(unsigned char *read_dev_no)
108 {
109 struct qeth_card *card;
110 struct net_device *ndev;
111 __u16 temp_dev_no;
112 unsigned long flags;
113 struct ccw_dev_id read_devid;
114
115 ndev = NULL;
116 memcpy(&temp_dev_no, read_dev_no, 2);
117 read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
118 list_for_each_entry(card, &qeth_core_card_list.list, list) {
119 ccw_device_get_id(CARD_RDEV(card), &read_devid);
120 if (read_devid.devno == temp_dev_no) {
121 ndev = card->dev;
122 break;
123 }
124 }
125 read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
126 return ndev;
127 }
128
129 static int qeth_l2_send_setgroupmac_cb(struct qeth_card *card,
130 struct qeth_reply *reply,
131 unsigned long data)
132 {
133 struct qeth_ipa_cmd *cmd;
134 __u8 *mac;
135
136 QETH_CARD_TEXT(card, 2, "L2Sgmacb");
137 cmd = (struct qeth_ipa_cmd *) data;
138 mac = &cmd->data.setdelmac.mac[0];
139 /* MAC already registered, needed in couple/uncouple case */
140 if (cmd->hdr.return_code == IPA_RC_L2_DUP_MAC) {
141 QETH_DBF_MESSAGE(2, "Group MAC %pM already existing on %s \n",
142 mac, QETH_CARD_IFNAME(card));
143 cmd->hdr.return_code = 0;
144 }
145 if (cmd->hdr.return_code)
146 QETH_DBF_MESSAGE(2, "Could not set group MAC %pM on %s: %x\n",
147 mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code);
148 return 0;
149 }
150
151 static int qeth_l2_send_setgroupmac(struct qeth_card *card, __u8 *mac)
152 {
153 QETH_CARD_TEXT(card, 2, "L2Sgmac");
154 return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETGMAC,
155 qeth_l2_send_setgroupmac_cb);
156 }
157
158 static int qeth_l2_send_delgroupmac_cb(struct qeth_card *card,
159 struct qeth_reply *reply,
160 unsigned long data)
161 {
162 struct qeth_ipa_cmd *cmd;
163 __u8 *mac;
164
165 QETH_CARD_TEXT(card, 2, "L2Dgmacb");
166 cmd = (struct qeth_ipa_cmd *) data;
167 mac = &cmd->data.setdelmac.mac[0];
168 if (cmd->hdr.return_code)
169 QETH_DBF_MESSAGE(2, "Could not delete group MAC %pM on %s: %x\n",
170 mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code);
171 return 0;
172 }
173
174 static int qeth_l2_send_delgroupmac(struct qeth_card *card, __u8 *mac)
175 {
176 QETH_CARD_TEXT(card, 2, "L2Dgmac");
177 return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELGMAC,
178 qeth_l2_send_delgroupmac_cb);
179 }
180
181 static void qeth_l2_add_mc(struct qeth_card *card, __u8 *mac, int vmac)
182 {
183 struct qeth_mc_mac *mc;
184 int rc;
185
186 mc = kmalloc(sizeof(struct qeth_mc_mac), GFP_ATOMIC);
187
188 if (!mc)
189 return;
190
191 memcpy(mc->mc_addr, mac, OSA_ADDR_LEN);
192 mc->mc_addrlen = OSA_ADDR_LEN;
193 mc->is_vmac = vmac;
194
195 if (vmac) {
196 rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
197 NULL);
198 } else {
199 rc = qeth_l2_send_setgroupmac(card, mac);
200 }
201
202 if (!rc)
203 list_add_tail(&mc->list, &card->mc_list);
204 else
205 kfree(mc);
206 }
207
208 static void qeth_l2_del_all_mc(struct qeth_card *card, int del)
209 {
210 struct qeth_mc_mac *mc, *tmp;
211
212 spin_lock_bh(&card->mclock);
213 list_for_each_entry_safe(mc, tmp, &card->mc_list, list) {
214 if (del) {
215 if (mc->is_vmac)
216 qeth_l2_send_setdelmac(card, mc->mc_addr,
217 IPA_CMD_DELVMAC, NULL);
218 else
219 qeth_l2_send_delgroupmac(card, mc->mc_addr);
220 }
221 list_del(&mc->list);
222 kfree(mc);
223 }
224 spin_unlock_bh(&card->mclock);
225 }
226
227 static inline int qeth_l2_get_cast_type(struct qeth_card *card,
228 struct sk_buff *skb)
229 {
230 if (card->info.type == QETH_CARD_TYPE_OSN)
231 return RTN_UNSPEC;
232 if (is_broadcast_ether_addr(skb->data))
233 return RTN_BROADCAST;
234 if (is_multicast_ether_addr(skb->data))
235 return RTN_MULTICAST;
236 return RTN_UNSPEC;
237 }
238
239 static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
240 struct sk_buff *skb, int ipv, int cast_type)
241 {
242 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
243
244 memset(hdr, 0, sizeof(struct qeth_hdr));
245 hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
246
247 /* set byte byte 3 to casting flags */
248 if (cast_type == RTN_MULTICAST)
249 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
250 else if (cast_type == RTN_BROADCAST)
251 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
252 else
253 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
254
255 hdr->hdr.l2.pkt_length = skb->len-QETH_HEADER_SIZE;
256 /* VSWITCH relies on the VLAN
257 * information to be present in
258 * the QDIO header */
259 if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
260 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
261 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
262 }
263 }
264
265 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
266 struct qeth_reply *reply, unsigned long data)
267 {
268 struct qeth_ipa_cmd *cmd;
269
270 QETH_CARD_TEXT(card, 2, "L2sdvcb");
271 cmd = (struct qeth_ipa_cmd *) data;
272 if (cmd->hdr.return_code) {
273 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x. "
274 "Continuing\n", cmd->data.setdelvlan.vlan_id,
275 QETH_CARD_IFNAME(card), cmd->hdr.return_code);
276 QETH_CARD_TEXT_(card, 2, "L2VL%4x", cmd->hdr.command);
277 QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code);
278 }
279 return 0;
280 }
281
282 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
283 enum qeth_ipa_cmds ipacmd)
284 {
285 struct qeth_ipa_cmd *cmd;
286 struct qeth_cmd_buffer *iob;
287
288 QETH_CARD_TEXT_(card, 4, "L2sdv%x", ipacmd);
289 iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
290 cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
291 cmd->data.setdelvlan.vlan_id = i;
292 return qeth_send_ipa_cmd(card, iob,
293 qeth_l2_send_setdelvlan_cb, NULL);
294 }
295
296 static void qeth_l2_process_vlans(struct qeth_card *card)
297 {
298 struct qeth_vlan_vid *id;
299 QETH_CARD_TEXT(card, 3, "L2prcvln");
300 spin_lock_bh(&card->vlanlock);
301 list_for_each_entry(id, &card->vid_list, list) {
302 qeth_l2_send_setdelvlan(card, id->vid, IPA_CMD_SETVLAN);
303 }
304 spin_unlock_bh(&card->vlanlock);
305 }
306
307 static int qeth_l2_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
308 {
309 struct qeth_card *card = dev->ml_priv;
310 struct qeth_vlan_vid *id;
311
312 QETH_CARD_TEXT_(card, 4, "aid:%d", vid);
313 if (!vid)
314 return 0;
315 if (card->info.type == QETH_CARD_TYPE_OSM) {
316 QETH_CARD_TEXT(card, 3, "aidOSM");
317 return 0;
318 }
319 if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
320 QETH_CARD_TEXT(card, 3, "aidREC");
321 return 0;
322 }
323 id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
324 if (id) {
325 id->vid = vid;
326 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
327 spin_lock_bh(&card->vlanlock);
328 list_add_tail(&id->list, &card->vid_list);
329 spin_unlock_bh(&card->vlanlock);
330 } else {
331 return -ENOMEM;
332 }
333 return 0;
334 }
335
336 static int qeth_l2_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
337 {
338 struct qeth_vlan_vid *id, *tmpid = NULL;
339 struct qeth_card *card = dev->ml_priv;
340
341 QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
342 if (card->info.type == QETH_CARD_TYPE_OSM) {
343 QETH_CARD_TEXT(card, 3, "kidOSM");
344 return 0;
345 }
346 if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
347 QETH_CARD_TEXT(card, 3, "kidREC");
348 return 0;
349 }
350 spin_lock_bh(&card->vlanlock);
351 list_for_each_entry(id, &card->vid_list, list) {
352 if (id->vid == vid) {
353 list_del(&id->list);
354 tmpid = id;
355 break;
356 }
357 }
358 spin_unlock_bh(&card->vlanlock);
359 if (tmpid) {
360 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
361 kfree(tmpid);
362 }
363 qeth_l2_set_multicast_list(card->dev);
364 return 0;
365 }
366
367 static int qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
368 {
369 int rc = 0;
370
371 QETH_DBF_TEXT(SETUP , 2, "stopcard");
372 QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
373
374 qeth_set_allowed_threads(card, 0, 1);
375 if (card->read.state == CH_STATE_UP &&
376 card->write.state == CH_STATE_UP &&
377 (card->state == CARD_STATE_UP)) {
378 if (recovery_mode &&
379 card->info.type != QETH_CARD_TYPE_OSN) {
380 qeth_l2_stop(card->dev);
381 } else {
382 rtnl_lock();
383 dev_close(card->dev);
384 rtnl_unlock();
385 }
386 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
387 card->state = CARD_STATE_SOFTSETUP;
388 }
389 if (card->state == CARD_STATE_SOFTSETUP) {
390 qeth_l2_del_all_mc(card, 0);
391 qeth_clear_ipacmd_list(card);
392 card->state = CARD_STATE_HARDSETUP;
393 }
394 if (card->state == CARD_STATE_HARDSETUP) {
395 qeth_qdio_clear_card(card, 0);
396 qeth_clear_qdio_buffers(card);
397 qeth_clear_working_pool_list(card);
398 card->state = CARD_STATE_DOWN;
399 }
400 if (card->state == CARD_STATE_DOWN) {
401 qeth_clear_cmd_buffers(&card->read);
402 qeth_clear_cmd_buffers(&card->write);
403 }
404 return rc;
405 }
406
407 static int qeth_l2_process_inbound_buffer(struct qeth_card *card,
408 int budget, int *done)
409 {
410 int work_done = 0;
411 struct sk_buff *skb;
412 struct qeth_hdr *hdr;
413 unsigned int len;
414
415 *done = 0;
416 BUG_ON(!budget);
417 while (budget) {
418 skb = qeth_core_get_next_skb(card,
419 &card->qdio.in_q->bufs[card->rx.b_index],
420 &card->rx.b_element, &card->rx.e_offset, &hdr);
421 if (!skb) {
422 *done = 1;
423 break;
424 }
425 skb->dev = card->dev;
426 switch (hdr->hdr.l2.id) {
427 case QETH_HEADER_TYPE_LAYER2:
428 skb->pkt_type = PACKET_HOST;
429 skb->protocol = eth_type_trans(skb, skb->dev);
430 skb->ip_summed = CHECKSUM_NONE;
431 if (skb->protocol == htons(ETH_P_802_2))
432 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
433 len = skb->len;
434 netif_receive_skb(skb);
435 break;
436 case QETH_HEADER_TYPE_OSN:
437 if (card->info.type == QETH_CARD_TYPE_OSN) {
438 skb_push(skb, sizeof(struct qeth_hdr));
439 skb_copy_to_linear_data(skb, hdr,
440 sizeof(struct qeth_hdr));
441 len = skb->len;
442 card->osn_info.data_cb(skb);
443 break;
444 }
445 /* else unknown */
446 default:
447 dev_kfree_skb_any(skb);
448 QETH_CARD_TEXT(card, 3, "inbunkno");
449 QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
450 continue;
451 }
452 work_done++;
453 budget--;
454 card->stats.rx_packets++;
455 card->stats.rx_bytes += len;
456 }
457 return work_done;
458 }
459
460 static int qeth_l2_poll(struct napi_struct *napi, int budget)
461 {
462 struct qeth_card *card = container_of(napi, struct qeth_card, napi);
463 int work_done = 0;
464 struct qeth_qdio_buffer *buffer;
465 int done;
466 int new_budget = budget;
467
468 if (card->options.performance_stats) {
469 card->perf_stats.inbound_cnt++;
470 card->perf_stats.inbound_start_time = qeth_get_micros();
471 }
472
473 while (1) {
474 if (!card->rx.b_count) {
475 card->rx.qdio_err = 0;
476 card->rx.b_count = qdio_get_next_buffers(
477 card->data.ccwdev, 0, &card->rx.b_index,
478 &card->rx.qdio_err);
479 if (card->rx.b_count <= 0) {
480 card->rx.b_count = 0;
481 break;
482 }
483 card->rx.b_element =
484 &card->qdio.in_q->bufs[card->rx.b_index]
485 .buffer->element[0];
486 card->rx.e_offset = 0;
487 }
488
489 while (card->rx.b_count) {
490 buffer = &card->qdio.in_q->bufs[card->rx.b_index];
491 if (!(card->rx.qdio_err &&
492 qeth_check_qdio_errors(card, buffer->buffer,
493 card->rx.qdio_err, "qinerr")))
494 work_done += qeth_l2_process_inbound_buffer(
495 card, new_budget, &done);
496 else
497 done = 1;
498
499 if (done) {
500 if (card->options.performance_stats)
501 card->perf_stats.bufs_rec++;
502 qeth_put_buffer_pool_entry(card,
503 buffer->pool_entry);
504 qeth_queue_input_buffer(card, card->rx.b_index);
505 card->rx.b_count--;
506 if (card->rx.b_count) {
507 card->rx.b_index =
508 (card->rx.b_index + 1) %
509 QDIO_MAX_BUFFERS_PER_Q;
510 card->rx.b_element =
511 &card->qdio.in_q
512 ->bufs[card->rx.b_index]
513 .buffer->element[0];
514 card->rx.e_offset = 0;
515 }
516 }
517
518 if (work_done >= budget)
519 goto out;
520 else
521 new_budget = budget - work_done;
522 }
523 }
524
525 napi_complete(napi);
526 if (qdio_start_irq(card->data.ccwdev, 0))
527 napi_schedule(&card->napi);
528 out:
529 if (card->options.performance_stats)
530 card->perf_stats.inbound_time += qeth_get_micros() -
531 card->perf_stats.inbound_start_time;
532 return work_done;
533 }
534
535 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
536 enum qeth_ipa_cmds ipacmd,
537 int (*reply_cb) (struct qeth_card *,
538 struct qeth_reply*,
539 unsigned long))
540 {
541 struct qeth_ipa_cmd *cmd;
542 struct qeth_cmd_buffer *iob;
543
544 QETH_CARD_TEXT(card, 2, "L2sdmac");
545 iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
546 cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
547 cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
548 memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
549 return qeth_send_ipa_cmd(card, iob, reply_cb, NULL);
550 }
551
552 static int qeth_l2_send_setmac_cb(struct qeth_card *card,
553 struct qeth_reply *reply,
554 unsigned long data)
555 {
556 struct qeth_ipa_cmd *cmd;
557
558 QETH_CARD_TEXT(card, 2, "L2Smaccb");
559 cmd = (struct qeth_ipa_cmd *) data;
560 if (cmd->hdr.return_code) {
561 QETH_CARD_TEXT_(card, 2, "L2er%x", cmd->hdr.return_code);
562 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
563 switch (cmd->hdr.return_code) {
564 case IPA_RC_L2_DUP_MAC:
565 case IPA_RC_L2_DUP_LAYER3_MAC:
566 dev_warn(&card->gdev->dev,
567 "MAC address %pM already exists\n",
568 cmd->data.setdelmac.mac);
569 break;
570 case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
571 case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
572 dev_warn(&card->gdev->dev,
573 "MAC address %pM is not authorized\n",
574 cmd->data.setdelmac.mac);
575 break;
576 default:
577 break;
578 }
579 } else {
580 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
581 memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac,
582 OSA_ADDR_LEN);
583 dev_info(&card->gdev->dev,
584 "MAC address %pM successfully registered on device %s\n",
585 card->dev->dev_addr, card->dev->name);
586 }
587 return 0;
588 }
589
590 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
591 {
592 QETH_CARD_TEXT(card, 2, "L2Setmac");
593 return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
594 qeth_l2_send_setmac_cb);
595 }
596
597 static int qeth_l2_send_delmac_cb(struct qeth_card *card,
598 struct qeth_reply *reply,
599 unsigned long data)
600 {
601 struct qeth_ipa_cmd *cmd;
602
603 QETH_CARD_TEXT(card, 2, "L2Dmaccb");
604 cmd = (struct qeth_ipa_cmd *) data;
605 if (cmd->hdr.return_code) {
606 QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code);
607 return 0;
608 }
609 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
610
611 return 0;
612 }
613
614 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
615 {
616 QETH_CARD_TEXT(card, 2, "L2Delmac");
617 if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
618 return 0;
619 return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC,
620 qeth_l2_send_delmac_cb);
621 }
622
623 static int qeth_l2_request_initial_mac(struct qeth_card *card)
624 {
625 int rc = 0;
626 char vendor_pre[] = {0x02, 0x00, 0x00};
627
628 QETH_DBF_TEXT(SETUP, 2, "doL2init");
629 QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
630
631 rc = qeth_query_setadapterparms(card);
632 if (rc) {
633 QETH_DBF_MESSAGE(2, "could not query adapter parameters on "
634 "device %s: x%x\n", CARD_BUS_ID(card), rc);
635 }
636
637 if (card->info.type == QETH_CARD_TYPE_IQD ||
638 card->info.type == QETH_CARD_TYPE_OSM ||
639 card->info.type == QETH_CARD_TYPE_OSX ||
640 card->info.guestlan) {
641 rc = qeth_setadpparms_change_macaddr(card);
642 if (rc) {
643 QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
644 "device %s: x%x\n", CARD_BUS_ID(card), rc);
645 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
646 return rc;
647 }
648 QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN);
649 } else {
650 eth_random_addr(card->dev->dev_addr);
651 memcpy(card->dev->dev_addr, vendor_pre, 3);
652 }
653 return 0;
654 }
655
656 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
657 {
658 struct sockaddr *addr = p;
659 struct qeth_card *card = dev->ml_priv;
660 int rc = 0;
661
662 QETH_CARD_TEXT(card, 3, "setmac");
663
664 if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
665 QETH_CARD_TEXT(card, 3, "setmcINV");
666 return -EOPNOTSUPP;
667 }
668
669 if (card->info.type == QETH_CARD_TYPE_OSN ||
670 card->info.type == QETH_CARD_TYPE_OSM ||
671 card->info.type == QETH_CARD_TYPE_OSX) {
672 QETH_CARD_TEXT(card, 3, "setmcTYP");
673 return -EOPNOTSUPP;
674 }
675 QETH_CARD_HEX(card, 3, addr->sa_data, OSA_ADDR_LEN);
676 if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
677 QETH_CARD_TEXT(card, 3, "setmcREC");
678 return -ERESTARTSYS;
679 }
680 rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
681 if (!rc)
682 rc = qeth_l2_send_setmac(card, addr->sa_data);
683 return rc ? -EINVAL : 0;
684 }
685
686 static void qeth_l2_set_multicast_list(struct net_device *dev)
687 {
688 struct qeth_card *card = dev->ml_priv;
689 struct netdev_hw_addr *ha;
690
691 if (card->info.type == QETH_CARD_TYPE_OSN)
692 return ;
693
694 QETH_CARD_TEXT(card, 3, "setmulti");
695 if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
696 (card->state != CARD_STATE_UP))
697 return;
698 qeth_l2_del_all_mc(card, 1);
699 spin_lock_bh(&card->mclock);
700 netdev_for_each_mc_addr(ha, dev)
701 qeth_l2_add_mc(card, ha->addr, 0);
702
703 netdev_for_each_uc_addr(ha, dev)
704 qeth_l2_add_mc(card, ha->addr, 1);
705
706 spin_unlock_bh(&card->mclock);
707 if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
708 return;
709 qeth_setadp_promisc_mode(card);
710 }
711
712 static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
713 {
714 int rc;
715 struct qeth_hdr *hdr = NULL;
716 int elements = 0;
717 struct qeth_card *card = dev->ml_priv;
718 struct sk_buff *new_skb = skb;
719 int ipv = qeth_get_ip_version(skb);
720 int cast_type = qeth_l2_get_cast_type(card, skb);
721 struct qeth_qdio_out_q *queue = card->qdio.out_qs
722 [qeth_get_priority_queue(card, skb, ipv, cast_type)];
723 int tx_bytes = skb->len;
724 int data_offset = -1;
725 int elements_needed = 0;
726 int hd_len = 0;
727
728 if ((card->state != CARD_STATE_UP) || !card->lan_online) {
729 card->stats.tx_carrier_errors++;
730 goto tx_drop;
731 }
732
733 if ((card->info.type == QETH_CARD_TYPE_OSN) &&
734 (skb->protocol == htons(ETH_P_IPV6)))
735 goto tx_drop;
736
737 if (card->options.performance_stats) {
738 card->perf_stats.outbound_cnt++;
739 card->perf_stats.outbound_start_time = qeth_get_micros();
740 }
741 netif_stop_queue(dev);
742
743 if (card->info.type == QETH_CARD_TYPE_OSN)
744 hdr = (struct qeth_hdr *)skb->data;
745 else {
746 if (card->info.type == QETH_CARD_TYPE_IQD) {
747 new_skb = skb;
748 data_offset = ETH_HLEN;
749 hd_len = ETH_HLEN;
750 hdr = kmem_cache_alloc(qeth_core_header_cache,
751 GFP_ATOMIC);
752 if (!hdr)
753 goto tx_drop;
754 elements_needed++;
755 skb_reset_mac_header(new_skb);
756 qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
757 hdr->hdr.l2.pkt_length = new_skb->len;
758 memcpy(((char *)hdr) + sizeof(struct qeth_hdr),
759 skb_mac_header(new_skb), ETH_HLEN);
760 } else {
761 /* create a clone with writeable headroom */
762 new_skb = skb_realloc_headroom(skb,
763 sizeof(struct qeth_hdr));
764 if (!new_skb)
765 goto tx_drop;
766 hdr = (struct qeth_hdr *)skb_push(new_skb,
767 sizeof(struct qeth_hdr));
768 skb_set_mac_header(new_skb, sizeof(struct qeth_hdr));
769 qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
770 }
771 }
772
773 elements = qeth_get_elements_no(card, (void *)hdr, new_skb,
774 elements_needed);
775 if (!elements) {
776 if (data_offset >= 0)
777 kmem_cache_free(qeth_core_header_cache, hdr);
778 goto tx_drop;
779 }
780
781 if (card->info.type != QETH_CARD_TYPE_IQD) {
782 if (qeth_hdr_chk_and_bounce(new_skb,
783 sizeof(struct qeth_hdr_layer2)))
784 goto tx_drop;
785 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
786 elements);
787 } else
788 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
789 elements, data_offset, hd_len);
790 if (!rc) {
791 card->stats.tx_packets++;
792 card->stats.tx_bytes += tx_bytes;
793 if (new_skb != skb)
794 dev_kfree_skb_any(skb);
795 rc = NETDEV_TX_OK;
796 } else {
797 if (data_offset >= 0)
798 kmem_cache_free(qeth_core_header_cache, hdr);
799
800 if (rc == -EBUSY) {
801 if (new_skb != skb)
802 dev_kfree_skb_any(new_skb);
803 return NETDEV_TX_BUSY;
804 } else
805 goto tx_drop;
806 }
807
808 netif_wake_queue(dev);
809 if (card->options.performance_stats)
810 card->perf_stats.outbound_time += qeth_get_micros() -
811 card->perf_stats.outbound_start_time;
812 return rc;
813
814 tx_drop:
815 card->stats.tx_dropped++;
816 card->stats.tx_errors++;
817 if ((new_skb != skb) && new_skb)
818 dev_kfree_skb_any(new_skb);
819 dev_kfree_skb_any(skb);
820 netif_wake_queue(dev);
821 return NETDEV_TX_OK;
822 }
823
824 static int __qeth_l2_open(struct net_device *dev)
825 {
826 struct qeth_card *card = dev->ml_priv;
827 int rc = 0;
828
829 QETH_CARD_TEXT(card, 4, "qethopen");
830 if (card->state == CARD_STATE_UP)
831 return rc;
832 if (card->state != CARD_STATE_SOFTSETUP)
833 return -ENODEV;
834
835 if ((card->info.type != QETH_CARD_TYPE_OSN) &&
836 (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
837 QETH_CARD_TEXT(card, 4, "nomacadr");
838 return -EPERM;
839 }
840 card->data.state = CH_STATE_UP;
841 card->state = CARD_STATE_UP;
842 netif_start_queue(dev);
843
844 if (qdio_stop_irq(card->data.ccwdev, 0) >= 0) {
845 napi_enable(&card->napi);
846 napi_schedule(&card->napi);
847 } else
848 rc = -EIO;
849 return rc;
850 }
851
852 static int qeth_l2_open(struct net_device *dev)
853 {
854 struct qeth_card *card = dev->ml_priv;
855
856 QETH_CARD_TEXT(card, 5, "qethope_");
857 if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
858 QETH_CARD_TEXT(card, 3, "openREC");
859 return -ERESTARTSYS;
860 }
861 return __qeth_l2_open(dev);
862 }
863
864 static int qeth_l2_stop(struct net_device *dev)
865 {
866 struct qeth_card *card = dev->ml_priv;
867
868 QETH_CARD_TEXT(card, 4, "qethstop");
869 netif_tx_disable(dev);
870 if (card->state == CARD_STATE_UP) {
871 card->state = CARD_STATE_SOFTSETUP;
872 napi_disable(&card->napi);
873 }
874 return 0;
875 }
876
877 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
878 {
879 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
880
881 INIT_LIST_HEAD(&card->vid_list);
882 INIT_LIST_HEAD(&card->mc_list);
883 card->options.layer2 = 1;
884 card->info.hwtrap = 0;
885 return 0;
886 }
887
888 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
889 {
890 struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
891
892 qeth_set_allowed_threads(card, 0, 1);
893 wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
894
895 if (cgdev->state == CCWGROUP_ONLINE)
896 qeth_l2_set_offline(cgdev);
897
898 if (card->dev) {
899 unregister_netdev(card->dev);
900 card->dev = NULL;
901 }
902 return;
903 }
904
905 static const struct ethtool_ops qeth_l2_ethtool_ops = {
906 .get_link = ethtool_op_get_link,
907 .get_strings = qeth_core_get_strings,
908 .get_ethtool_stats = qeth_core_get_ethtool_stats,
909 .get_sset_count = qeth_core_get_sset_count,
910 .get_drvinfo = qeth_core_get_drvinfo,
911 .get_settings = qeth_core_ethtool_get_settings,
912 };
913
914 static const struct ethtool_ops qeth_l2_osn_ops = {
915 .get_strings = qeth_core_get_strings,
916 .get_ethtool_stats = qeth_core_get_ethtool_stats,
917 .get_sset_count = qeth_core_get_sset_count,
918 .get_drvinfo = qeth_core_get_drvinfo,
919 };
920
921 static const struct net_device_ops qeth_l2_netdev_ops = {
922 .ndo_open = qeth_l2_open,
923 .ndo_stop = qeth_l2_stop,
924 .ndo_get_stats = qeth_get_stats,
925 .ndo_start_xmit = qeth_l2_hard_start_xmit,
926 .ndo_validate_addr = eth_validate_addr,
927 .ndo_set_rx_mode = qeth_l2_set_multicast_list,
928 .ndo_do_ioctl = qeth_l2_do_ioctl,
929 .ndo_set_mac_address = qeth_l2_set_mac_address,
930 .ndo_change_mtu = qeth_change_mtu,
931 .ndo_vlan_rx_add_vid = qeth_l2_vlan_rx_add_vid,
932 .ndo_vlan_rx_kill_vid = qeth_l2_vlan_rx_kill_vid,
933 .ndo_tx_timeout = qeth_tx_timeout,
934 };
935
936 static int qeth_l2_setup_netdev(struct qeth_card *card)
937 {
938 switch (card->info.type) {
939 case QETH_CARD_TYPE_IQD:
940 card->dev = alloc_netdev(0, "hsi%d", ether_setup);
941 break;
942 case QETH_CARD_TYPE_OSN:
943 card->dev = alloc_netdev(0, "osn%d", ether_setup);
944 card->dev->flags |= IFF_NOARP;
945 break;
946 default:
947 card->dev = alloc_etherdev(0);
948 }
949
950 if (!card->dev)
951 return -ENODEV;
952
953 card->dev->ml_priv = card;
954 card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
955 card->dev->mtu = card->info.initial_mtu;
956 card->dev->netdev_ops = &qeth_l2_netdev_ops;
957 if (card->info.type != QETH_CARD_TYPE_OSN)
958 SET_ETHTOOL_OPS(card->dev, &qeth_l2_ethtool_ops);
959 else
960 SET_ETHTOOL_OPS(card->dev, &qeth_l2_osn_ops);
961 card->dev->features |= NETIF_F_HW_VLAN_FILTER;
962 card->info.broadcast_capable = 1;
963 qeth_l2_request_initial_mac(card);
964 SET_NETDEV_DEV(card->dev, &card->gdev->dev);
965 netif_napi_add(card->dev, &card->napi, qeth_l2_poll, QETH_NAPI_WEIGHT);
966 return register_netdev(card->dev);
967 }
968
969 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
970 {
971 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
972 int rc = 0;
973 enum qeth_card_states recover_flag;
974
975 BUG_ON(!card);
976 mutex_lock(&card->discipline_mutex);
977 mutex_lock(&card->conf_mutex);
978 QETH_DBF_TEXT(SETUP, 2, "setonlin");
979 QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
980
981 recover_flag = card->state;
982 rc = qeth_core_hardsetup_card(card);
983 if (rc) {
984 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
985 rc = -ENODEV;
986 goto out_remove;
987 }
988
989 if (!card->dev && qeth_l2_setup_netdev(card)) {
990 rc = -ENODEV;
991 goto out_remove;
992 }
993
994 if (card->info.type != QETH_CARD_TYPE_OSN)
995 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
996
997 if (qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP)) {
998 if (card->info.hwtrap &&
999 qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM))
1000 card->info.hwtrap = 0;
1001 } else
1002 card->info.hwtrap = 0;
1003
1004 card->state = CARD_STATE_HARDSETUP;
1005 memset(&card->rx, 0, sizeof(struct qeth_rx));
1006 qeth_print_status_message(card);
1007
1008 /* softsetup */
1009 QETH_DBF_TEXT(SETUP, 2, "softsetp");
1010
1011 rc = qeth_send_startlan(card);
1012 if (rc) {
1013 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1014 if (rc == 0xe080) {
1015 dev_warn(&card->gdev->dev,
1016 "The LAN is offline\n");
1017 card->lan_online = 0;
1018 goto contin;
1019 }
1020 rc = -ENODEV;
1021 goto out_remove;
1022 } else
1023 card->lan_online = 1;
1024
1025 contin:
1026 if ((card->info.type == QETH_CARD_TYPE_OSD) ||
1027 (card->info.type == QETH_CARD_TYPE_OSX))
1028 /* configure isolation level */
1029 qeth_set_access_ctrl_online(card);
1030
1031 if (card->info.type != QETH_CARD_TYPE_OSN &&
1032 card->info.type != QETH_CARD_TYPE_OSM)
1033 qeth_l2_process_vlans(card);
1034
1035 netif_tx_disable(card->dev);
1036
1037 rc = qeth_init_qdio_queues(card);
1038 if (rc) {
1039 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1040 rc = -ENODEV;
1041 goto out_remove;
1042 }
1043 card->state = CARD_STATE_SOFTSETUP;
1044 if (card->lan_online)
1045 netif_carrier_on(card->dev);
1046 else
1047 netif_carrier_off(card->dev);
1048
1049 qeth_set_allowed_threads(card, 0xffffffff, 0);
1050 if (recover_flag == CARD_STATE_RECOVER) {
1051 if (recovery_mode &&
1052 card->info.type != QETH_CARD_TYPE_OSN) {
1053 __qeth_l2_open(card->dev);
1054 } else {
1055 rtnl_lock();
1056 dev_open(card->dev);
1057 rtnl_unlock();
1058 }
1059 /* this also sets saved unicast addresses */
1060 qeth_l2_set_multicast_list(card->dev);
1061 }
1062 /* let user_space know that device is online */
1063 kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1064 mutex_unlock(&card->conf_mutex);
1065 mutex_unlock(&card->discipline_mutex);
1066 return 0;
1067
1068 out_remove:
1069 qeth_l2_stop_card(card, 0);
1070 ccw_device_set_offline(CARD_DDEV(card));
1071 ccw_device_set_offline(CARD_WDEV(card));
1072 ccw_device_set_offline(CARD_RDEV(card));
1073 if (recover_flag == CARD_STATE_RECOVER)
1074 card->state = CARD_STATE_RECOVER;
1075 else
1076 card->state = CARD_STATE_DOWN;
1077 mutex_unlock(&card->conf_mutex);
1078 mutex_unlock(&card->discipline_mutex);
1079 return rc;
1080 }
1081
1082 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1083 {
1084 return __qeth_l2_set_online(gdev, 0);
1085 }
1086
1087 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1088 int recovery_mode)
1089 {
1090 struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1091 int rc = 0, rc2 = 0, rc3 = 0;
1092 enum qeth_card_states recover_flag;
1093
1094 mutex_lock(&card->discipline_mutex);
1095 mutex_lock(&card->conf_mutex);
1096 QETH_DBF_TEXT(SETUP, 3, "setoffl");
1097 QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1098
1099 if (card->dev && netif_carrier_ok(card->dev))
1100 netif_carrier_off(card->dev);
1101 recover_flag = card->state;
1102 if ((!recovery_mode && card->info.hwtrap) || card->info.hwtrap == 2) {
1103 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1104 card->info.hwtrap = 1;
1105 }
1106 qeth_l2_stop_card(card, recovery_mode);
1107 rc = ccw_device_set_offline(CARD_DDEV(card));
1108 rc2 = ccw_device_set_offline(CARD_WDEV(card));
1109 rc3 = ccw_device_set_offline(CARD_RDEV(card));
1110 if (!rc)
1111 rc = (rc2) ? rc2 : rc3;
1112 if (rc)
1113 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1114 if (recover_flag == CARD_STATE_UP)
1115 card->state = CARD_STATE_RECOVER;
1116 /* let user_space know that device is offline */
1117 kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1118 mutex_unlock(&card->conf_mutex);
1119 mutex_unlock(&card->discipline_mutex);
1120 return 0;
1121 }
1122
1123 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1124 {
1125 return __qeth_l2_set_offline(cgdev, 0);
1126 }
1127
1128 static int qeth_l2_recover(void *ptr)
1129 {
1130 struct qeth_card *card;
1131 int rc = 0;
1132
1133 card = (struct qeth_card *) ptr;
1134 QETH_CARD_TEXT(card, 2, "recover1");
1135 if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1136 return 0;
1137 QETH_CARD_TEXT(card, 2, "recover2");
1138 dev_warn(&card->gdev->dev,
1139 "A recovery process has been started for the device\n");
1140 __qeth_l2_set_offline(card->gdev, 1);
1141 rc = __qeth_l2_set_online(card->gdev, 1);
1142 if (!rc)
1143 dev_info(&card->gdev->dev,
1144 "Device successfully recovered!\n");
1145 else {
1146 rtnl_lock();
1147 dev_close(card->dev);
1148 rtnl_unlock();
1149 dev_warn(&card->gdev->dev, "The qeth device driver "
1150 "failed to recover an error on the device\n");
1151 }
1152 qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1153 qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1154 return 0;
1155 }
1156
1157 static int __init qeth_l2_init(void)
1158 {
1159 pr_info("register layer 2 discipline\n");
1160 return 0;
1161 }
1162
1163 static void __exit qeth_l2_exit(void)
1164 {
1165 pr_info("unregister layer 2 discipline\n");
1166 }
1167
1168 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1169 {
1170 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1171 qeth_set_allowed_threads(card, 0, 1);
1172 if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
1173 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1174 qeth_qdio_clear_card(card, 0);
1175 qeth_clear_qdio_buffers(card);
1176 }
1177
1178 static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev)
1179 {
1180 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1181
1182 if (card->dev)
1183 netif_device_detach(card->dev);
1184 qeth_set_allowed_threads(card, 0, 1);
1185 wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1186 if (gdev->state == CCWGROUP_OFFLINE)
1187 return 0;
1188 if (card->state == CARD_STATE_UP) {
1189 if (card->info.hwtrap)
1190 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1191 __qeth_l2_set_offline(card->gdev, 1);
1192 } else
1193 __qeth_l2_set_offline(card->gdev, 0);
1194 return 0;
1195 }
1196
1197 static int qeth_l2_pm_resume(struct ccwgroup_device *gdev)
1198 {
1199 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1200 int rc = 0;
1201
1202 if (gdev->state == CCWGROUP_OFFLINE)
1203 goto out;
1204
1205 if (card->state == CARD_STATE_RECOVER) {
1206 rc = __qeth_l2_set_online(card->gdev, 1);
1207 if (rc) {
1208 rtnl_lock();
1209 dev_close(card->dev);
1210 rtnl_unlock();
1211 }
1212 } else
1213 rc = __qeth_l2_set_online(card->gdev, 0);
1214 out:
1215 qeth_set_allowed_threads(card, 0xffffffff, 0);
1216 if (card->dev)
1217 netif_device_attach(card->dev);
1218 if (rc)
1219 dev_warn(&card->gdev->dev, "The qeth device driver "
1220 "failed to recover an error on the device\n");
1221 return rc;
1222 }
1223
1224 struct qeth_discipline qeth_l2_discipline = {
1225 .start_poll = qeth_qdio_start_poll,
1226 .input_handler = (qdio_handler_t *) qeth_qdio_input_handler,
1227 .output_handler = (qdio_handler_t *) qeth_qdio_output_handler,
1228 .recover = qeth_l2_recover,
1229 .setup = qeth_l2_probe_device,
1230 .remove = qeth_l2_remove_device,
1231 .set_online = qeth_l2_set_online,
1232 .set_offline = qeth_l2_set_offline,
1233 .shutdown = qeth_l2_shutdown,
1234 .freeze = qeth_l2_pm_suspend,
1235 .thaw = qeth_l2_pm_resume,
1236 .restore = qeth_l2_pm_resume,
1237 };
1238 EXPORT_SYMBOL_GPL(qeth_l2_discipline);
1239
1240 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1241 struct qeth_cmd_buffer *iob)
1242 {
1243 unsigned long flags;
1244 int rc = 0;
1245
1246 QETH_CARD_TEXT(card, 5, "osndctrd");
1247
1248 wait_event(card->wait_q,
1249 atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1250 qeth_prepare_control_data(card, len, iob);
1251 QETH_CARD_TEXT(card, 6, "osnoirqp");
1252 spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1253 rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1254 (addr_t) iob, 0, 0);
1255 spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1256 if (rc) {
1257 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1258 "ccw_device_start rc = %i\n", rc);
1259 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1260 qeth_release_buffer(iob->channel, iob);
1261 atomic_set(&card->write.irq_pending, 0);
1262 wake_up(&card->wait_q);
1263 }
1264 return rc;
1265 }
1266
1267 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1268 struct qeth_cmd_buffer *iob, int data_len)
1269 {
1270 u16 s1, s2;
1271
1272 QETH_CARD_TEXT(card, 4, "osndipa");
1273
1274 qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1275 s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1276 s2 = (u16)data_len;
1277 memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1278 memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1279 memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1280 memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1281 return qeth_osn_send_control_data(card, s1, iob);
1282 }
1283
1284 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1285 {
1286 struct qeth_cmd_buffer *iob;
1287 struct qeth_card *card;
1288 int rc;
1289
1290 if (!dev)
1291 return -ENODEV;
1292 card = dev->ml_priv;
1293 if (!card)
1294 return -ENODEV;
1295 QETH_CARD_TEXT(card, 2, "osnsdmc");
1296 if ((card->state != CARD_STATE_UP) &&
1297 (card->state != CARD_STATE_SOFTSETUP))
1298 return -ENODEV;
1299 iob = qeth_wait_for_buffer(&card->write);
1300 memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1301 rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1302 return rc;
1303 }
1304 EXPORT_SYMBOL(qeth_osn_assist);
1305
1306 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1307 int (*assist_cb)(struct net_device *, void *),
1308 int (*data_cb)(struct sk_buff *))
1309 {
1310 struct qeth_card *card;
1311
1312 *dev = qeth_l2_netdev_by_devno(read_dev_no);
1313 if (*dev == NULL)
1314 return -ENODEV;
1315 card = (*dev)->ml_priv;
1316 if (!card)
1317 return -ENODEV;
1318 QETH_CARD_TEXT(card, 2, "osnreg");
1319 if ((assist_cb == NULL) || (data_cb == NULL))
1320 return -EINVAL;
1321 card->osn_info.assist_cb = assist_cb;
1322 card->osn_info.data_cb = data_cb;
1323 return 0;
1324 }
1325 EXPORT_SYMBOL(qeth_osn_register);
1326
1327 void qeth_osn_deregister(struct net_device *dev)
1328 {
1329 struct qeth_card *card;
1330
1331 if (!dev)
1332 return;
1333 card = dev->ml_priv;
1334 if (!card)
1335 return;
1336 QETH_CARD_TEXT(card, 2, "osndereg");
1337 card->osn_info.assist_cb = NULL;
1338 card->osn_info.data_cb = NULL;
1339 return;
1340 }
1341 EXPORT_SYMBOL(qeth_osn_deregister);
1342
1343 module_init(qeth_l2_init);
1344 module_exit(qeth_l2_exit);
1345 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1346 MODULE_DESCRIPTION("qeth layer 2 discipline");
1347 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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