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[linux-2.6.git] / drivers / s390 / net / qeth_l2_main.c
blob691cecd03b837ab85eefb8dfe04dbb9adf228cc8
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/etherdevice.h>
20 #include <linux/mii.h>
21 #include <linux/ip.h>
22 #include <linux/list.h>
23
24 #include "qeth_core.h"
25
26 static int qeth_l2_set_offline(struct ccwgroup_device *);
27 static int qeth_l2_stop(struct net_device *);
28 static int qeth_l2_send_delmac(struct qeth_card *, __u8 *);
29 static int qeth_l2_send_setdelmac(struct qeth_card *, __u8 *,
30 enum qeth_ipa_cmds,
31 int (*reply_cb) (struct qeth_card *,
32 struct qeth_reply*,
33 unsigned long));
34 static void qeth_l2_set_multicast_list(struct net_device *);
35 static int qeth_l2_recover(void *);
36
37 static int qeth_l2_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
38 {
39 struct qeth_card *card = dev->ml_priv;
40 struct mii_ioctl_data *mii_data;
41 int rc = 0;
42
43 if (!card)
44 return -ENODEV;
45
46 if ((card->state != CARD_STATE_UP) &&
47 (card->state != CARD_STATE_SOFTSETUP))
48 return -ENODEV;
49
50 if (card->info.type == QETH_CARD_TYPE_OSN)
51 return -EPERM;
52
53 switch (cmd) {
54 case SIOC_QETH_ADP_SET_SNMP_CONTROL:
55 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
56 break;
57 case SIOC_QETH_GET_CARD_TYPE:
58 if ((card->info.type == QETH_CARD_TYPE_OSAE) &&
59 !card->info.guestlan)
60 return 1;
61 return 0;
62 break;
63 case SIOCGMIIPHY:
64 mii_data = if_mii(rq);
65 mii_data->phy_id = 0;
66 break;
67 case SIOCGMIIREG:
68 mii_data = if_mii(rq);
69 if (mii_data->phy_id != 0)
70 rc = -EINVAL;
71 else
72 mii_data->val_out = qeth_mdio_read(dev,
73 mii_data->phy_id, mii_data->reg_num);
74 break;
75 default:
76 rc = -EOPNOTSUPP;
77 }
78 if (rc)
79 QETH_DBF_TEXT_(TRACE, 2, "ioce%d", rc);
80 return rc;
81 }
82
83 static int qeth_l2_verify_dev(struct net_device *dev)
84 {
85 struct qeth_card *card;
86 unsigned long flags;
87 int rc = 0;
88
89 read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
90 list_for_each_entry(card, &qeth_core_card_list.list, list) {
91 if (card->dev == dev) {
92 rc = QETH_REAL_CARD;
93 break;
94 }
95 }
96 read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
97
98 return rc;
99 }
100
101 static struct net_device *qeth_l2_netdev_by_devno(unsigned char *read_dev_no)
102 {
103 struct qeth_card *card;
104 struct net_device *ndev;
105 __u16 temp_dev_no;
106 unsigned long flags;
107 struct ccw_dev_id read_devid;
108
109 ndev = NULL;
110 memcpy(&temp_dev_no, read_dev_no, 2);
111 read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
112 list_for_each_entry(card, &qeth_core_card_list.list, list) {
113 ccw_device_get_id(CARD_RDEV(card), &read_devid);
114 if (read_devid.devno == temp_dev_no) {
115 ndev = card->dev;
116 break;
117 }
118 }
119 read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
120 return ndev;
121 }
122
123 static int qeth_l2_send_setgroupmac_cb(struct qeth_card *card,
124 struct qeth_reply *reply,
125 unsigned long data)
126 {
127 struct qeth_ipa_cmd *cmd;
128 __u8 *mac;
129
130 QETH_DBF_TEXT(TRACE, 2, "L2Sgmacb");
131 cmd = (struct qeth_ipa_cmd *) data;
132 mac = &cmd->data.setdelmac.mac[0];
133 /* MAC already registered, needed in couple/uncouple case */
134 if (cmd->hdr.return_code == IPA_RC_L2_DUP_MAC) {
135 QETH_DBF_MESSAGE(2, "Group MAC %pM already existing on %s \n",
136 mac, QETH_CARD_IFNAME(card));
137 cmd->hdr.return_code = 0;
138 }
139 if (cmd->hdr.return_code)
140 QETH_DBF_MESSAGE(2, "Could not set group MAC %pM on %s: %x\n",
141 mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code);
142 return 0;
143 }
144
145 static int qeth_l2_send_setgroupmac(struct qeth_card *card, __u8 *mac)
146 {
147 QETH_DBF_TEXT(TRACE, 2, "L2Sgmac");
148 return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETGMAC,
149 qeth_l2_send_setgroupmac_cb);
150 }
151
152 static int qeth_l2_send_delgroupmac_cb(struct qeth_card *card,
153 struct qeth_reply *reply,
154 unsigned long data)
155 {
156 struct qeth_ipa_cmd *cmd;
157 __u8 *mac;
158
159 QETH_DBF_TEXT(TRACE, 2, "L2Dgmacb");
160 cmd = (struct qeth_ipa_cmd *) data;
161 mac = &cmd->data.setdelmac.mac[0];
162 if (cmd->hdr.return_code)
163 QETH_DBF_MESSAGE(2, "Could not delete group MAC %pM on %s: %x\n",
164 mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code);
165 return 0;
166 }
167
168 static int qeth_l2_send_delgroupmac(struct qeth_card *card, __u8 *mac)
169 {
170 QETH_DBF_TEXT(TRACE, 2, "L2Dgmac");
171 return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELGMAC,
172 qeth_l2_send_delgroupmac_cb);
173 }
174
175 static void qeth_l2_add_mc(struct qeth_card *card, __u8 *mac, int vmac)
176 {
177 struct qeth_mc_mac *mc;
178 int rc;
179
180 mc = kmalloc(sizeof(struct qeth_mc_mac), GFP_ATOMIC);
181
182 if (!mc)
183 return;
184
185 memcpy(mc->mc_addr, mac, OSA_ADDR_LEN);
186 mc->mc_addrlen = OSA_ADDR_LEN;
187 mc->is_vmac = vmac;
188
189 if (vmac) {
190 rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
191 NULL);
192 } else {
193 rc = qeth_l2_send_setgroupmac(card, mac);
194 }
195
196 if (!rc)
197 list_add_tail(&mc->list, &card->mc_list);
198 else
199 kfree(mc);
200 }
201
202 static void qeth_l2_del_all_mc(struct qeth_card *card)
203 {
204 struct qeth_mc_mac *mc, *tmp;
205
206 spin_lock_bh(&card->mclock);
207 list_for_each_entry_safe(mc, tmp, &card->mc_list, list) {
208 if (mc->is_vmac)
209 qeth_l2_send_setdelmac(card, mc->mc_addr,
210 IPA_CMD_DELVMAC, NULL);
211 else
212 qeth_l2_send_delgroupmac(card, mc->mc_addr);
213 list_del(&mc->list);
214 kfree(mc);
215 }
216 spin_unlock_bh(&card->mclock);
217 }
218
219 static void qeth_l2_get_packet_type(struct qeth_card *card,
220 struct qeth_hdr *hdr, struct sk_buff *skb)
221 {
222 __u16 hdr_mac;
223
224 if (!memcmp(skb->data + QETH_HEADER_SIZE,
225 skb->dev->broadcast, 6)) {
226 /* broadcast? */
227 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
228 return;
229 }
230 hdr_mac = *((__u16 *)skb->data);
231 /* tr multicast? */
232 switch (card->info.link_type) {
233 case QETH_LINK_TYPE_HSTR:
234 case QETH_LINK_TYPE_LANE_TR:
235 if ((hdr_mac == QETH_TR_MAC_NC) ||
236 (hdr_mac == QETH_TR_MAC_C))
237 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
238 else
239 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
240 break;
241 /* eth or so multicast? */
242 default:
243 if ((hdr_mac == QETH_ETH_MAC_V4) ||
244 (hdr_mac == QETH_ETH_MAC_V6))
245 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
246 else
247 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
248 }
249 }
250
251 static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
252 struct sk_buff *skb, int ipv, int cast_type)
253 {
254 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
255
256 memset(hdr, 0, sizeof(struct qeth_hdr));
257 hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
258
259 /* set byte byte 3 to casting flags */
260 if (cast_type == RTN_MULTICAST)
261 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
262 else if (cast_type == RTN_BROADCAST)
263 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
264 else
265 qeth_l2_get_packet_type(card, hdr, skb);
266
267 hdr->hdr.l2.pkt_length = skb->len-QETH_HEADER_SIZE;
268 /* VSWITCH relies on the VLAN
269 * information to be present in
270 * the QDIO header */
271 if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
272 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
273 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
274 }
275 }
276
277 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
278 struct qeth_reply *reply, unsigned long data)
279 {
280 struct qeth_ipa_cmd *cmd;
281
282 QETH_DBF_TEXT(TRACE, 2, "L2sdvcb");
283 cmd = (struct qeth_ipa_cmd *) data;
284 if (cmd->hdr.return_code) {
285 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x. "
286 "Continuing\n", cmd->data.setdelvlan.vlan_id,
287 QETH_CARD_IFNAME(card), cmd->hdr.return_code);
288 QETH_DBF_TEXT_(TRACE, 2, "L2VL%4x", cmd->hdr.command);
289 QETH_DBF_TEXT_(TRACE, 2, "L2%s", CARD_BUS_ID(card));
290 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
291 }
292 return 0;
293 }
294
295 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
296 enum qeth_ipa_cmds ipacmd)
297 {
298 struct qeth_ipa_cmd *cmd;
299 struct qeth_cmd_buffer *iob;
300
301 QETH_DBF_TEXT_(TRACE, 4, "L2sdv%x", ipacmd);
302 iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
303 cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
304 cmd->data.setdelvlan.vlan_id = i;
305 return qeth_send_ipa_cmd(card, iob,
306 qeth_l2_send_setdelvlan_cb, NULL);
307 }
308
309 static void qeth_l2_process_vlans(struct qeth_card *card, int clear)
310 {
311 struct qeth_vlan_vid *id;
312 QETH_DBF_TEXT(TRACE, 3, "L2prcvln");
313 spin_lock_bh(&card->vlanlock);
314 list_for_each_entry(id, &card->vid_list, list) {
315 if (clear)
316 qeth_l2_send_setdelvlan(card, id->vid,
317 IPA_CMD_DELVLAN);
318 else
319 qeth_l2_send_setdelvlan(card, id->vid,
320 IPA_CMD_SETVLAN);
321 }
322 spin_unlock_bh(&card->vlanlock);
323 }
324
325 static void qeth_l2_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
326 {
327 struct qeth_card *card = dev->ml_priv;
328 struct qeth_vlan_vid *id;
329
330 QETH_DBF_TEXT_(TRACE, 4, "aid:%d", vid);
331 if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
332 QETH_DBF_TEXT(TRACE, 3, "aidREC");
333 return;
334 }
335 id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
336 if (id) {
337 id->vid = vid;
338 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
339 spin_lock_bh(&card->vlanlock);
340 list_add_tail(&id->list, &card->vid_list);
341 spin_unlock_bh(&card->vlanlock);
342 }
343 }
344
345 static void qeth_l2_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
346 {
347 struct qeth_vlan_vid *id, *tmpid = NULL;
348 struct qeth_card *card = dev->ml_priv;
349
350 QETH_DBF_TEXT_(TRACE, 4, "kid:%d", vid);
351 if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
352 QETH_DBF_TEXT(TRACE, 3, "kidREC");
353 return;
354 }
355 spin_lock_bh(&card->vlanlock);
356 list_for_each_entry(id, &card->vid_list, list) {
357 if (id->vid == vid) {
358 list_del(&id->list);
359 tmpid = id;
360 break;
361 }
362 }
363 spin_unlock_bh(&card->vlanlock);
364 if (tmpid) {
365 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
366 kfree(tmpid);
367 }
368 qeth_l2_set_multicast_list(card->dev);
369 }
370
371 static int qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
372 {
373 int rc = 0;
374
375 QETH_DBF_TEXT(SETUP , 2, "stopcard");
376 QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
377
378 qeth_set_allowed_threads(card, 0, 1);
379 if (card->read.state == CH_STATE_UP &&
380 card->write.state == CH_STATE_UP &&
381 (card->state == CARD_STATE_UP)) {
382 if (recovery_mode &&
383 card->info.type != QETH_CARD_TYPE_OSN) {
384 qeth_l2_stop(card->dev);
385 } else {
386 rtnl_lock();
387 dev_close(card->dev);
388 rtnl_unlock();
389 }
390 if (!card->use_hard_stop ||
391 recovery_mode) {
392 __u8 *mac = &card->dev->dev_addr[0];
393 rc = qeth_l2_send_delmac(card, mac);
394 QETH_DBF_TEXT_(SETUP, 2, "Lerr%d", rc);
395 }
396 card->state = CARD_STATE_SOFTSETUP;
397 }
398 if (card->state == CARD_STATE_SOFTSETUP) {
399 qeth_l2_process_vlans(card, 1);
400 if (!card->use_hard_stop ||
401 recovery_mode)
402 qeth_l2_del_all_mc(card);
403 qeth_clear_ipacmd_list(card);
404 card->state = CARD_STATE_HARDSETUP;
405 }
406 if (card->state == CARD_STATE_HARDSETUP) {
407 qeth_qdio_clear_card(card, 0);
408 qeth_clear_qdio_buffers(card);
409 qeth_clear_working_pool_list(card);
410 card->state = CARD_STATE_DOWN;
411 }
412 if (card->state == CARD_STATE_DOWN) {
413 qeth_clear_cmd_buffers(&card->read);
414 qeth_clear_cmd_buffers(&card->write);
415 }
416 card->use_hard_stop = 0;
417 return rc;
418 }
419
420 static void qeth_l2_process_inbound_buffer(struct qeth_card *card,
421 struct qeth_qdio_buffer *buf, int index)
422 {
423 struct qdio_buffer_element *element;
424 struct sk_buff *skb;
425 struct qeth_hdr *hdr;
426 int offset;
427 unsigned int len;
428
429 /* get first element of current buffer */
430 element = (struct qdio_buffer_element *)&buf->buffer->element[0];
431 offset = 0;
432 if (card->options.performance_stats)
433 card->perf_stats.bufs_rec++;
434 while ((skb = qeth_core_get_next_skb(card, buf->buffer, &element,
435 &offset, &hdr))) {
436 skb->dev = card->dev;
437 /* is device UP ? */
438 if (!(card->dev->flags & IFF_UP)) {
439 dev_kfree_skb_any(skb);
440 continue;
441 }
442
443 switch (hdr->hdr.l2.id) {
444 case QETH_HEADER_TYPE_LAYER2:
445 skb->pkt_type = PACKET_HOST;
446 skb->protocol = eth_type_trans(skb, skb->dev);
447 if (card->options.checksum_type == NO_CHECKSUMMING)
448 skb->ip_summed = CHECKSUM_UNNECESSARY;
449 else
450 skb->ip_summed = CHECKSUM_NONE;
451 if (skb->protocol == htons(ETH_P_802_2))
452 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
453 len = skb->len;
454 netif_rx(skb);
455 break;
456 case QETH_HEADER_TYPE_OSN:
457 if (card->info.type == QETH_CARD_TYPE_OSN) {
458 skb_push(skb, sizeof(struct qeth_hdr));
459 skb_copy_to_linear_data(skb, hdr,
460 sizeof(struct qeth_hdr));
461 len = skb->len;
462 card->osn_info.data_cb(skb);
463 break;
464 }
465 /* else unknown */
466 default:
467 dev_kfree_skb_any(skb);
468 QETH_DBF_TEXT(TRACE, 3, "inbunkno");
469 QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
470 continue;
471 }
472 card->dev->last_rx = jiffies;
473 card->stats.rx_packets++;
474 card->stats.rx_bytes += len;
475 }
476 }
477
478 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
479 enum qeth_ipa_cmds ipacmd,
480 int (*reply_cb) (struct qeth_card *,
481 struct qeth_reply*,
482 unsigned long))
483 {
484 struct qeth_ipa_cmd *cmd;
485 struct qeth_cmd_buffer *iob;
486
487 QETH_DBF_TEXT(TRACE, 2, "L2sdmac");
488 iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
489 cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
490 cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
491 memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
492 return qeth_send_ipa_cmd(card, iob, reply_cb, NULL);
493 }
494
495 static int qeth_l2_send_setmac_cb(struct qeth_card *card,
496 struct qeth_reply *reply,
497 unsigned long data)
498 {
499 struct qeth_ipa_cmd *cmd;
500
501 QETH_DBF_TEXT(TRACE, 2, "L2Smaccb");
502 cmd = (struct qeth_ipa_cmd *) data;
503 if (cmd->hdr.return_code) {
504 QETH_DBF_TEXT_(TRACE, 2, "L2er%x", cmd->hdr.return_code);
505 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
506 switch (cmd->hdr.return_code) {
507 case IPA_RC_L2_DUP_MAC:
508 case IPA_RC_L2_DUP_LAYER3_MAC:
509 dev_warn(&card->gdev->dev,
510 "MAC address "
511 "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x "
512 "already exists\n",
513 card->dev->dev_addr[0], card->dev->dev_addr[1],
514 card->dev->dev_addr[2], card->dev->dev_addr[3],
515 card->dev->dev_addr[4], card->dev->dev_addr[5]);
516 break;
517 case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
518 case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
519 dev_warn(&card->gdev->dev,
520 "MAC address "
521 "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x "
522 "is not authorized\n",
523 card->dev->dev_addr[0], card->dev->dev_addr[1],
524 card->dev->dev_addr[2], card->dev->dev_addr[3],
525 card->dev->dev_addr[4], card->dev->dev_addr[5]);
526 break;
527 default:
528 break;
529 }
530 cmd->hdr.return_code = -EIO;
531 } else {
532 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
533 memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac,
534 OSA_ADDR_LEN);
535 dev_info(&card->gdev->dev,
536 "MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x "
537 "successfully registered on device %s\n",
538 card->dev->dev_addr[0], card->dev->dev_addr[1],
539 card->dev->dev_addr[2], card->dev->dev_addr[3],
540 card->dev->dev_addr[4], card->dev->dev_addr[5],
541 card->dev->name);
542 }
543 return 0;
544 }
545
546 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
547 {
548 QETH_DBF_TEXT(TRACE, 2, "L2Setmac");
549 return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
550 qeth_l2_send_setmac_cb);
551 }
552
553 static int qeth_l2_send_delmac_cb(struct qeth_card *card,
554 struct qeth_reply *reply,
555 unsigned long data)
556 {
557 struct qeth_ipa_cmd *cmd;
558
559 QETH_DBF_TEXT(TRACE, 2, "L2Dmaccb");
560 cmd = (struct qeth_ipa_cmd *) data;
561 if (cmd->hdr.return_code) {
562 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
563 cmd->hdr.return_code = -EIO;
564 return 0;
565 }
566 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
567
568 return 0;
569 }
570
571 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
572 {
573 QETH_DBF_TEXT(TRACE, 2, "L2Delmac");
574 if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
575 return 0;
576 return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC,
577 qeth_l2_send_delmac_cb);
578 }
579
580 static int qeth_l2_request_initial_mac(struct qeth_card *card)
581 {
582 int rc = 0;
583 char vendor_pre[] = {0x02, 0x00, 0x00};
584
585 QETH_DBF_TEXT(SETUP, 2, "doL2init");
586 QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
587
588 rc = qeth_query_setadapterparms(card);
589 if (rc) {
590 QETH_DBF_MESSAGE(2, "could not query adapter parameters on "
591 "device %s: x%x\n", CARD_BUS_ID(card), rc);
592 }
593
594 if ((card->info.type == QETH_CARD_TYPE_IQD) ||
595 (card->info.guestlan)) {
596 rc = qeth_setadpparms_change_macaddr(card);
597 if (rc) {
598 QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
599 "device %s: x%x\n", CARD_BUS_ID(card), rc);
600 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
601 return rc;
602 }
603 QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN);
604 } else {
605 random_ether_addr(card->dev->dev_addr);
606 memcpy(card->dev->dev_addr, vendor_pre, 3);
607 }
608 return 0;
609 }
610
611 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
612 {
613 struct sockaddr *addr = p;
614 struct qeth_card *card = dev->ml_priv;
615 int rc = 0;
616
617 QETH_DBF_TEXT(TRACE, 3, "setmac");
618
619 if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
620 QETH_DBF_TEXT(TRACE, 3, "setmcINV");
621 return -EOPNOTSUPP;
622 }
623
624 if (card->info.type == QETH_CARD_TYPE_OSN) {
625 QETH_DBF_TEXT(TRACE, 3, "setmcOSN");
626 return -EOPNOTSUPP;
627 }
628 QETH_DBF_TEXT_(TRACE, 3, "%s", CARD_BUS_ID(card));
629 QETH_DBF_HEX(TRACE, 3, addr->sa_data, OSA_ADDR_LEN);
630 if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
631 QETH_DBF_TEXT(TRACE, 3, "setmcREC");
632 return -ERESTARTSYS;
633 }
634 rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
635 if (!rc)
636 rc = qeth_l2_send_setmac(card, addr->sa_data);
637 return rc;
638 }
639
640 static void qeth_l2_set_multicast_list(struct net_device *dev)
641 {
642 struct qeth_card *card = dev->ml_priv;
643 struct dev_addr_list *dm;
644 struct netdev_hw_addr *ha;
645
646 if (card->info.type == QETH_CARD_TYPE_OSN)
647 return ;
648
649 QETH_DBF_TEXT(TRACE, 3, "setmulti");
650 if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
651 (card->state != CARD_STATE_UP))
652 return;
653 qeth_l2_del_all_mc(card);
654 spin_lock_bh(&card->mclock);
655 for (dm = dev->mc_list; dm; dm = dm->next)
656 qeth_l2_add_mc(card, dm->da_addr, 0);
657
658 list_for_each_entry(ha, &dev->uc.list, list)
659 qeth_l2_add_mc(card, ha->addr, 1);
660
661 spin_unlock_bh(&card->mclock);
662 if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
663 return;
664 qeth_setadp_promisc_mode(card);
665 }
666
667 static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
668 {
669 int rc;
670 struct qeth_hdr *hdr = NULL;
671 int elements = 0;
672 struct qeth_card *card = dev->ml_priv;
673 struct sk_buff *new_skb = skb;
674 int ipv = qeth_get_ip_version(skb);
675 int cast_type = qeth_get_cast_type(card, skb);
676 struct qeth_qdio_out_q *queue = card->qdio.out_qs
677 [qeth_get_priority_queue(card, skb, ipv, cast_type)];
678 int tx_bytes = skb->len;
679 int data_offset = -1;
680 int elements_needed = 0;
681 int hd_len = 0;
682
683 if ((card->state != CARD_STATE_UP) || !card->lan_online) {
684 card->stats.tx_carrier_errors++;
685 goto tx_drop;
686 }
687
688 if ((card->info.type == QETH_CARD_TYPE_OSN) &&
689 (skb->protocol == htons(ETH_P_IPV6)))
690 goto tx_drop;
691
692 if (card->options.performance_stats) {
693 card->perf_stats.outbound_cnt++;
694 card->perf_stats.outbound_start_time = qeth_get_micros();
695 }
696 netif_stop_queue(dev);
697
698 if (card->info.type == QETH_CARD_TYPE_OSN)
699 hdr = (struct qeth_hdr *)skb->data;
700 else {
701 if (card->info.type == QETH_CARD_TYPE_IQD) {
702 new_skb = skb;
703 data_offset = ETH_HLEN;
704 hd_len = ETH_HLEN;
705 hdr = kmem_cache_alloc(qeth_core_header_cache,
706 GFP_ATOMIC);
707 if (!hdr)
708 goto tx_drop;
709 elements_needed++;
710 skb_reset_mac_header(new_skb);
711 qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
712 hdr->hdr.l2.pkt_length = new_skb->len;
713 memcpy(((char *)hdr) + sizeof(struct qeth_hdr),
714 skb_mac_header(new_skb), ETH_HLEN);
715 } else {
716 /* create a clone with writeable headroom */
717 new_skb = skb_realloc_headroom(skb,
718 sizeof(struct qeth_hdr));
719 if (!new_skb)
720 goto tx_drop;
721 hdr = (struct qeth_hdr *)skb_push(new_skb,
722 sizeof(struct qeth_hdr));
723 skb_set_mac_header(new_skb, sizeof(struct qeth_hdr));
724 qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
725 }
726 }
727
728 elements = qeth_get_elements_no(card, (void *)hdr, new_skb,
729 elements_needed);
730 if (!elements) {
731 if (data_offset >= 0)
732 kmem_cache_free(qeth_core_header_cache, hdr);
733 goto tx_drop;
734 }
735
736 if (card->info.type != QETH_CARD_TYPE_IQD)
737 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
738 elements);
739 else
740 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
741 elements, data_offset, hd_len);
742 if (!rc) {
743 card->stats.tx_packets++;
744 card->stats.tx_bytes += tx_bytes;
745 if (new_skb != skb)
746 dev_kfree_skb_any(skb);
747 } else {
748 if (data_offset >= 0)
749 kmem_cache_free(qeth_core_header_cache, hdr);
750
751 if (rc == -EBUSY) {
752 if (new_skb != skb)
753 dev_kfree_skb_any(new_skb);
754 return NETDEV_TX_BUSY;
755 } else
756 goto tx_drop;
757 }
758
759 netif_wake_queue(dev);
760 if (card->options.performance_stats)
761 card->perf_stats.outbound_time += qeth_get_micros() -
762 card->perf_stats.outbound_start_time;
763 return rc;
764
765 tx_drop:
766 card->stats.tx_dropped++;
767 card->stats.tx_errors++;
768 if ((new_skb != skb) && new_skb)
769 dev_kfree_skb_any(new_skb);
770 dev_kfree_skb_any(skb);
771 netif_wake_queue(dev);
772 return NETDEV_TX_OK;
773 }
774
775 static void qeth_l2_qdio_input_handler(struct ccw_device *ccwdev,
776 unsigned int qdio_err, unsigned int queue,
777 int first_element, int count, unsigned long card_ptr)
778 {
779 struct net_device *net_dev;
780 struct qeth_card *card;
781 struct qeth_qdio_buffer *buffer;
782 int index;
783 int i;
784
785 card = (struct qeth_card *) card_ptr;
786 net_dev = card->dev;
787 if (card->options.performance_stats) {
788 card->perf_stats.inbound_cnt++;
789 card->perf_stats.inbound_start_time = qeth_get_micros();
790 }
791 if (qdio_err & QDIO_ERROR_ACTIVATE_CHECK_CONDITION) {
792 QETH_DBF_TEXT(TRACE, 1, "qdinchk");
793 QETH_DBF_TEXT_(TRACE, 1, "%s", CARD_BUS_ID(card));
794 QETH_DBF_TEXT_(TRACE, 1, "%04X%04X", first_element,
795 count);
796 QETH_DBF_TEXT_(TRACE, 1, "%04X", queue);
797 qeth_schedule_recovery(card);
798 return;
799 }
800 for (i = first_element; i < (first_element + count); ++i) {
801 index = i % QDIO_MAX_BUFFERS_PER_Q;
802 buffer = &card->qdio.in_q->bufs[index];
803 if (!(qdio_err &&
804 qeth_check_qdio_errors(buffer->buffer, qdio_err, "qinerr")))
805 qeth_l2_process_inbound_buffer(card, buffer, index);
806 /* clear buffer and give back to hardware */
807 qeth_put_buffer_pool_entry(card, buffer->pool_entry);
808 qeth_queue_input_buffer(card, index);
809 }
810 if (card->options.performance_stats)
811 card->perf_stats.inbound_time += qeth_get_micros() -
812 card->perf_stats.inbound_start_time;
813 }
814
815 static int qeth_l2_open(struct net_device *dev)
816 {
817 struct qeth_card *card = dev->ml_priv;
818
819 QETH_DBF_TEXT(TRACE, 4, "qethopen");
820 if (card->state != CARD_STATE_SOFTSETUP)
821 return -ENODEV;
822
823 if ((card->info.type != QETH_CARD_TYPE_OSN) &&
824 (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
825 QETH_DBF_TEXT(TRACE, 4, "nomacadr");
826 return -EPERM;
827 }
828 card->data.state = CH_STATE_UP;
829 card->state = CARD_STATE_UP;
830 netif_start_queue(dev);
831
832 if (!card->lan_online && netif_carrier_ok(dev))
833 netif_carrier_off(dev);
834 return 0;
835 }
836
837
838 static int qeth_l2_stop(struct net_device *dev)
839 {
840 struct qeth_card *card = dev->ml_priv;
841
842 QETH_DBF_TEXT(TRACE, 4, "qethstop");
843 netif_tx_disable(dev);
844 if (card->state == CARD_STATE_UP)
845 card->state = CARD_STATE_SOFTSETUP;
846 return 0;
847 }
848
849 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
850 {
851 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
852
853 INIT_LIST_HEAD(&card->vid_list);
854 INIT_LIST_HEAD(&card->mc_list);
855 card->options.layer2 = 1;
856 card->discipline.input_handler = (qdio_handler_t *)
857 qeth_l2_qdio_input_handler;
858 card->discipline.output_handler = (qdio_handler_t *)
859 qeth_qdio_output_handler;
860 card->discipline.recover = qeth_l2_recover;
861 return 0;
862 }
863
864 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
865 {
866 struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
867
868 qeth_set_allowed_threads(card, 0, 1);
869 wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
870
871 if (cgdev->state == CCWGROUP_ONLINE) {
872 card->use_hard_stop = 1;
873 qeth_l2_set_offline(cgdev);
874 }
875
876 if (card->dev) {
877 unregister_netdev(card->dev);
878 card->dev = NULL;
879 }
880
881 qeth_l2_del_all_mc(card);
882 return;
883 }
884
885 static struct ethtool_ops qeth_l2_ethtool_ops = {
886 .get_link = ethtool_op_get_link,
887 .get_strings = qeth_core_get_strings,
888 .get_ethtool_stats = qeth_core_get_ethtool_stats,
889 .get_stats_count = qeth_core_get_stats_count,
890 .get_drvinfo = qeth_core_get_drvinfo,
891 .get_settings = qeth_core_ethtool_get_settings,
892 };
893
894 static struct ethtool_ops qeth_l2_osn_ops = {
895 .get_strings = qeth_core_get_strings,
896 .get_ethtool_stats = qeth_core_get_ethtool_stats,
897 .get_stats_count = qeth_core_get_stats_count,
898 .get_drvinfo = qeth_core_get_drvinfo,
899 };
900
901 static const struct net_device_ops qeth_l2_netdev_ops = {
902 .ndo_open = qeth_l2_open,
903 .ndo_stop = qeth_l2_stop,
904 .ndo_get_stats = qeth_get_stats,
905 .ndo_start_xmit = qeth_l2_hard_start_xmit,
906 .ndo_validate_addr = eth_validate_addr,
907 .ndo_set_multicast_list = qeth_l2_set_multicast_list,
908 .ndo_do_ioctl = qeth_l2_do_ioctl,
909 .ndo_set_mac_address = qeth_l2_set_mac_address,
910 .ndo_change_mtu = qeth_change_mtu,
911 .ndo_vlan_rx_add_vid = qeth_l2_vlan_rx_add_vid,
912 .ndo_vlan_rx_kill_vid = qeth_l2_vlan_rx_kill_vid,
913 .ndo_tx_timeout = qeth_tx_timeout,
914 };
915
916 static int qeth_l2_setup_netdev(struct qeth_card *card)
917 {
918 switch (card->info.type) {
919 case QETH_CARD_TYPE_OSAE:
920 card->dev = alloc_etherdev(0);
921 break;
922 case QETH_CARD_TYPE_IQD:
923 card->dev = alloc_netdev(0, "hsi%d", ether_setup);
924 break;
925 case QETH_CARD_TYPE_OSN:
926 card->dev = alloc_netdev(0, "osn%d", ether_setup);
927 card->dev->flags |= IFF_NOARP;
928 break;
929 default:
930 card->dev = alloc_etherdev(0);
931 }
932
933 if (!card->dev)
934 return -ENODEV;
935
936 card->dev->ml_priv = card;
937 card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
938 card->dev->mtu = card->info.initial_mtu;
939 card->dev->netdev_ops = &qeth_l2_netdev_ops;
940 if (card->info.type != QETH_CARD_TYPE_OSN)
941 SET_ETHTOOL_OPS(card->dev, &qeth_l2_ethtool_ops);
942 else
943 SET_ETHTOOL_OPS(card->dev, &qeth_l2_osn_ops);
944 card->dev->features |= NETIF_F_HW_VLAN_FILTER;
945 card->info.broadcast_capable = 1;
946 qeth_l2_request_initial_mac(card);
947 SET_NETDEV_DEV(card->dev, &card->gdev->dev);
948 return register_netdev(card->dev);
949 }
950
951 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
952 {
953 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
954 int rc = 0;
955 enum qeth_card_states recover_flag;
956
957 BUG_ON(!card);
958 QETH_DBF_TEXT(SETUP, 2, "setonlin");
959 QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
960
961 qeth_set_allowed_threads(card, QETH_RECOVER_THREAD, 1);
962 recover_flag = card->state;
963 rc = ccw_device_set_online(CARD_RDEV(card));
964 if (rc) {
965 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
966 return -EIO;
967 }
968 rc = ccw_device_set_online(CARD_WDEV(card));
969 if (rc) {
970 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
971 return -EIO;
972 }
973 rc = ccw_device_set_online(CARD_DDEV(card));
974 if (rc) {
975 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
976 return -EIO;
977 }
978
979 rc = qeth_core_hardsetup_card(card);
980 if (rc) {
981 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
982 goto out_remove;
983 }
984
985 if (!card->dev && qeth_l2_setup_netdev(card))
986 goto out_remove;
987
988 if (card->info.type != QETH_CARD_TYPE_OSN)
989 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
990
991 card->state = CARD_STATE_HARDSETUP;
992 qeth_print_status_message(card);
993
994 /* softsetup */
995 QETH_DBF_TEXT(SETUP, 2, "softsetp");
996
997 rc = qeth_send_startlan(card);
998 if (rc) {
999 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1000 if (rc == 0xe080) {
1001 dev_warn(&card->gdev->dev,
1002 "The LAN is offline\n");
1003 card->lan_online = 0;
1004 return 0;
1005 }
1006 goto out_remove;
1007 } else
1008 card->lan_online = 1;
1009
1010 if (card->info.type != QETH_CARD_TYPE_OSN) {
1011 qeth_set_large_send(card, card->options.large_send);
1012 qeth_l2_process_vlans(card, 0);
1013 }
1014
1015 netif_tx_disable(card->dev);
1016
1017 rc = qeth_init_qdio_queues(card);
1018 if (rc) {
1019 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1020 goto out_remove;
1021 }
1022 card->state = CARD_STATE_SOFTSETUP;
1023 netif_carrier_on(card->dev);
1024
1025 qeth_set_allowed_threads(card, 0xffffffff, 0);
1026 if (recover_flag == CARD_STATE_RECOVER) {
1027 if (recovery_mode &&
1028 card->info.type != QETH_CARD_TYPE_OSN) {
1029 qeth_l2_open(card->dev);
1030 } else {
1031 rtnl_lock();
1032 dev_open(card->dev);
1033 rtnl_unlock();
1034 }
1035 /* this also sets saved unicast addresses */
1036 qeth_l2_set_multicast_list(card->dev);
1037 }
1038 /* let user_space know that device is online */
1039 kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1040 return 0;
1041 out_remove:
1042 card->use_hard_stop = 1;
1043 qeth_l2_stop_card(card, 0);
1044 ccw_device_set_offline(CARD_DDEV(card));
1045 ccw_device_set_offline(CARD_WDEV(card));
1046 ccw_device_set_offline(CARD_RDEV(card));
1047 if (recover_flag == CARD_STATE_RECOVER)
1048 card->state = CARD_STATE_RECOVER;
1049 else
1050 card->state = CARD_STATE_DOWN;
1051 return -ENODEV;
1052 }
1053
1054 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1055 {
1056 return __qeth_l2_set_online(gdev, 0);
1057 }
1058
1059 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1060 int recovery_mode)
1061 {
1062 struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1063 int rc = 0, rc2 = 0, rc3 = 0;
1064 enum qeth_card_states recover_flag;
1065
1066 QETH_DBF_TEXT(SETUP, 3, "setoffl");
1067 QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1068
1069 if (card->dev && netif_carrier_ok(card->dev))
1070 netif_carrier_off(card->dev);
1071 recover_flag = card->state;
1072 qeth_l2_stop_card(card, recovery_mode);
1073 rc = ccw_device_set_offline(CARD_DDEV(card));
1074 rc2 = ccw_device_set_offline(CARD_WDEV(card));
1075 rc3 = ccw_device_set_offline(CARD_RDEV(card));
1076 if (!rc)
1077 rc = (rc2) ? rc2 : rc3;
1078 if (rc)
1079 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1080 if (recover_flag == CARD_STATE_UP)
1081 card->state = CARD_STATE_RECOVER;
1082 /* let user_space know that device is offline */
1083 kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1084 return 0;
1085 }
1086
1087 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1088 {
1089 return __qeth_l2_set_offline(cgdev, 0);
1090 }
1091
1092 static int qeth_l2_recover(void *ptr)
1093 {
1094 struct qeth_card *card;
1095 int rc = 0;
1096
1097 card = (struct qeth_card *) ptr;
1098 QETH_DBF_TEXT(TRACE, 2, "recover1");
1099 QETH_DBF_HEX(TRACE, 2, &card, sizeof(void *));
1100 if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1101 return 0;
1102 QETH_DBF_TEXT(TRACE, 2, "recover2");
1103 dev_warn(&card->gdev->dev,
1104 "A recovery process has been started for the device\n");
1105 card->use_hard_stop = 1;
1106 __qeth_l2_set_offline(card->gdev, 1);
1107 rc = __qeth_l2_set_online(card->gdev, 1);
1108 /* don't run another scheduled recovery */
1109 qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1110 qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1111 if (!rc)
1112 dev_info(&card->gdev->dev,
1113 "Device successfully recovered!\n");
1114 else {
1115 if (card->dev) {
1116 rtnl_lock();
1117 dev_close(card->dev);
1118 rtnl_unlock();
1119 }
1120 dev_warn(&card->gdev->dev, "The qeth device driver "
1121 "failed to recover an error on the device\n");
1122 }
1123 return 0;
1124 }
1125
1126 static int __init qeth_l2_init(void)
1127 {
1128 pr_info("register layer 2 discipline\n");
1129 return 0;
1130 }
1131
1132 static void __exit qeth_l2_exit(void)
1133 {
1134 pr_info("unregister layer 2 discipline\n");
1135 }
1136
1137 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1138 {
1139 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1140 qeth_qdio_clear_card(card, 0);
1141 qeth_clear_qdio_buffers(card);
1142 }
1143
1144 static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev)
1145 {
1146 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1147
1148 if (card->dev)
1149 netif_device_detach(card->dev);
1150 qeth_set_allowed_threads(card, 0, 1);
1151 wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1152 if (gdev->state == CCWGROUP_OFFLINE)
1153 return 0;
1154 if (card->state == CARD_STATE_UP) {
1155 card->use_hard_stop = 1;
1156 __qeth_l2_set_offline(card->gdev, 1);
1157 } else
1158 __qeth_l2_set_offline(card->gdev, 0);
1159 return 0;
1160 }
1161
1162 static int qeth_l2_pm_resume(struct ccwgroup_device *gdev)
1163 {
1164 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1165 int rc = 0;
1166
1167 if (gdev->state == CCWGROUP_OFFLINE)
1168 goto out;
1169
1170 if (card->state == CARD_STATE_RECOVER) {
1171 rc = __qeth_l2_set_online(card->gdev, 1);
1172 if (rc) {
1173 if (card->dev) {
1174 rtnl_lock();
1175 dev_close(card->dev);
1176 rtnl_unlock();
1177 }
1178 }
1179 } else
1180 rc = __qeth_l2_set_online(card->gdev, 0);
1181 out:
1182 qeth_set_allowed_threads(card, 0xffffffff, 0);
1183 if (card->dev)
1184 netif_device_attach(card->dev);
1185 if (rc)
1186 dev_warn(&card->gdev->dev, "The qeth device driver "
1187 "failed to recover an error on the device\n");
1188 return rc;
1189 }
1190
1191 struct ccwgroup_driver qeth_l2_ccwgroup_driver = {
1192 .probe = qeth_l2_probe_device,
1193 .remove = qeth_l2_remove_device,
1194 .set_online = qeth_l2_set_online,
1195 .set_offline = qeth_l2_set_offline,
1196 .shutdown = qeth_l2_shutdown,
1197 .freeze = qeth_l2_pm_suspend,
1198 .thaw = qeth_l2_pm_resume,
1199 .restore = qeth_l2_pm_resume,
1200 };
1201 EXPORT_SYMBOL_GPL(qeth_l2_ccwgroup_driver);
1202
1203 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1204 struct qeth_cmd_buffer *iob)
1205 {
1206 unsigned long flags;
1207 int rc = 0;
1208
1209 QETH_DBF_TEXT(TRACE, 5, "osndctrd");
1210
1211 wait_event(card->wait_q,
1212 atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1213 qeth_prepare_control_data(card, len, iob);
1214 QETH_DBF_TEXT(TRACE, 6, "osnoirqp");
1215 spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1216 rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1217 (addr_t) iob, 0, 0);
1218 spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1219 if (rc) {
1220 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1221 "ccw_device_start rc = %i\n", rc);
1222 QETH_DBF_TEXT_(TRACE, 2, " err%d", rc);
1223 qeth_release_buffer(iob->channel, iob);
1224 atomic_set(&card->write.irq_pending, 0);
1225 wake_up(&card->wait_q);
1226 }
1227 return rc;
1228 }
1229
1230 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1231 struct qeth_cmd_buffer *iob, int data_len)
1232 {
1233 u16 s1, s2;
1234
1235 QETH_DBF_TEXT(TRACE, 4, "osndipa");
1236
1237 qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1238 s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1239 s2 = (u16)data_len;
1240 memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1241 memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1242 memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1243 memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1244 return qeth_osn_send_control_data(card, s1, iob);
1245 }
1246
1247 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1248 {
1249 struct qeth_cmd_buffer *iob;
1250 struct qeth_card *card;
1251 int rc;
1252
1253 QETH_DBF_TEXT(TRACE, 2, "osnsdmc");
1254 if (!dev)
1255 return -ENODEV;
1256 card = dev->ml_priv;
1257 if (!card)
1258 return -ENODEV;
1259 if ((card->state != CARD_STATE_UP) &&
1260 (card->state != CARD_STATE_SOFTSETUP))
1261 return -ENODEV;
1262 iob = qeth_wait_for_buffer(&card->write);
1263 memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1264 rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1265 return rc;
1266 }
1267 EXPORT_SYMBOL(qeth_osn_assist);
1268
1269 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1270 int (*assist_cb)(struct net_device *, void *),
1271 int (*data_cb)(struct sk_buff *))
1272 {
1273 struct qeth_card *card;
1274
1275 QETH_DBF_TEXT(TRACE, 2, "osnreg");
1276 *dev = qeth_l2_netdev_by_devno(read_dev_no);
1277 if (*dev == NULL)
1278 return -ENODEV;
1279 card = (*dev)->ml_priv;
1280 if (!card)
1281 return -ENODEV;
1282 if ((assist_cb == NULL) || (data_cb == NULL))
1283 return -EINVAL;
1284 card->osn_info.assist_cb = assist_cb;
1285 card->osn_info.data_cb = data_cb;
1286 return 0;
1287 }
1288 EXPORT_SYMBOL(qeth_osn_register);
1289
1290 void qeth_osn_deregister(struct net_device *dev)
1291 {
1292 struct qeth_card *card;
1293
1294 QETH_DBF_TEXT(TRACE, 2, "osndereg");
1295 if (!dev)
1296 return;
1297 card = dev->ml_priv;
1298 if (!card)
1299 return;
1300 card->osn_info.assist_cb = NULL;
1301 card->osn_info.data_cb = NULL;
1302 return;
1303 }
1304 EXPORT_SYMBOL(qeth_osn_deregister);
1305
1306 module_init(qeth_l2_init);
1307 module_exit(qeth_l2_exit);
1308 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1309 MODULE_DESCRIPTION("qeth layer 2 discipline");
1310 MODULE_LICENSE("GPL");
Linus' kernel tree