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MIPS: handle write_combine in pci_mmap_page_range
[linux-2.6/linux-loongson.git] / drivers / s390 / net / qeth_l2_main.c
blob172031baedc1aef4d44f4c03663612e56b76c646
1 /*
2 * drivers/s390/net/qeth_l2_main.c
3 *
4 * Copyright IBM Corp. 2007
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
23 #include "qeth_core.h"
24
25 static int qeth_l2_set_offline(struct ccwgroup_device *);
26 static int qeth_l2_stop(struct net_device *);
27 static int qeth_l2_send_delmac(struct qeth_card *, __u8 *);
28 static int qeth_l2_send_setdelmac(struct qeth_card *, __u8 *,
29 enum qeth_ipa_cmds,
30 int (*reply_cb) (struct qeth_card *,
31 struct qeth_reply*,
32 unsigned long));
33 static void qeth_l2_set_multicast_list(struct net_device *);
34 static int qeth_l2_recover(void *);
35
36 static int qeth_l2_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
37 {
38 struct qeth_card *card = dev->ml_priv;
39 struct mii_ioctl_data *mii_data;
40 int rc = 0;
41
42 if (!card)
43 return -ENODEV;
44
45 if ((card->state != CARD_STATE_UP) &&
46 (card->state != CARD_STATE_SOFTSETUP))
47 return -ENODEV;
48
49 if (card->info.type == QETH_CARD_TYPE_OSN)
50 return -EPERM;
51
52 switch (cmd) {
53 case SIOC_QETH_ADP_SET_SNMP_CONTROL:
54 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
55 break;
56 case SIOC_QETH_GET_CARD_TYPE:
57 if ((card->info.type == QETH_CARD_TYPE_OSAE) &&
58 !card->info.guestlan)
59 return 1;
60 return 0;
61 break;
62 case SIOCGMIIPHY:
63 mii_data = if_mii(rq);
64 mii_data->phy_id = 0;
65 break;
66 case SIOCGMIIREG:
67 mii_data = if_mii(rq);
68 if (mii_data->phy_id != 0)
69 rc = -EINVAL;
70 else
71 mii_data->val_out = qeth_mdio_read(dev,
72 mii_data->phy_id, mii_data->reg_num);
73 break;
74 default:
75 rc = -EOPNOTSUPP;
76 }
77 if (rc)
78 QETH_DBF_TEXT_(TRACE, 2, "ioce%d", rc);
79 return rc;
80 }
81
82 static int qeth_l2_verify_dev(struct net_device *dev)
83 {
84 struct qeth_card *card;
85 unsigned long flags;
86 int rc = 0;
87
88 read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
89 list_for_each_entry(card, &qeth_core_card_list.list, list) {
90 if (card->dev == dev) {
91 rc = QETH_REAL_CARD;
92 break;
93 }
94 }
95 read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
96
97 return rc;
98 }
99
100 static struct net_device *qeth_l2_netdev_by_devno(unsigned char *read_dev_no)
101 {
102 struct qeth_card *card;
103 struct net_device *ndev;
104 __u16 temp_dev_no;
105 unsigned long flags;
106 struct ccw_dev_id read_devid;
107
108 ndev = NULL;
109 memcpy(&temp_dev_no, read_dev_no, 2);
110 read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
111 list_for_each_entry(card, &qeth_core_card_list.list, list) {
112 ccw_device_get_id(CARD_RDEV(card), &read_devid);
113 if (read_devid.devno == temp_dev_no) {
114 ndev = card->dev;
115 break;
116 }
117 }
118 read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
119 return ndev;
120 }
121
122 static int qeth_l2_send_setgroupmac_cb(struct qeth_card *card,
123 struct qeth_reply *reply,
124 unsigned long data)
125 {
126 struct qeth_ipa_cmd *cmd;
127 __u8 *mac;
128
129 QETH_DBF_TEXT(TRACE, 2, "L2Sgmacb");
130 cmd = (struct qeth_ipa_cmd *) data;
131 mac = &cmd->data.setdelmac.mac[0];
132 /* MAC already registered, needed in couple/uncouple case */
133 if (cmd->hdr.return_code == 0x2005) {
134 QETH_DBF_MESSAGE(2, "Group MAC %pM already existing on %s \n",
135 mac, QETH_CARD_IFNAME(card));
136 cmd->hdr.return_code = 0;
137 }
138 if (cmd->hdr.return_code)
139 QETH_DBF_MESSAGE(2, "Could not set group MAC %pM on %s: %x\n",
140 mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code);
141 return 0;
142 }
143
144 static int qeth_l2_send_setgroupmac(struct qeth_card *card, __u8 *mac)
145 {
146 QETH_DBF_TEXT(TRACE, 2, "L2Sgmac");
147 return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETGMAC,
148 qeth_l2_send_setgroupmac_cb);
149 }
150
151 static int qeth_l2_send_delgroupmac_cb(struct qeth_card *card,
152 struct qeth_reply *reply,
153 unsigned long data)
154 {
155 struct qeth_ipa_cmd *cmd;
156 __u8 *mac;
157
158 QETH_DBF_TEXT(TRACE, 2, "L2Dgmacb");
159 cmd = (struct qeth_ipa_cmd *) data;
160 mac = &cmd->data.setdelmac.mac[0];
161 if (cmd->hdr.return_code)
162 QETH_DBF_MESSAGE(2, "Could not delete group MAC %pM on %s: %x\n",
163 mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code);
164 return 0;
165 }
166
167 static int qeth_l2_send_delgroupmac(struct qeth_card *card, __u8 *mac)
168 {
169 QETH_DBF_TEXT(TRACE, 2, "L2Dgmac");
170 return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELGMAC,
171 qeth_l2_send_delgroupmac_cb);
172 }
173
174 static void qeth_l2_add_mc(struct qeth_card *card, __u8 *mac, int vmac)
175 {
176 struct qeth_mc_mac *mc;
177 int rc;
178
179 mc = kmalloc(sizeof(struct qeth_mc_mac), GFP_ATOMIC);
180
181 if (!mc)
182 return;
183
184 memcpy(mc->mc_addr, mac, OSA_ADDR_LEN);
185 mc->mc_addrlen = OSA_ADDR_LEN;
186 mc->is_vmac = vmac;
187
188 if (vmac) {
189 rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
190 NULL);
191 } else {
192 rc = qeth_l2_send_setgroupmac(card, mac);
193 }
194
195 if (!rc)
196 list_add_tail(&mc->list, &card->mc_list);
197 else
198 kfree(mc);
199 }
200
201 static void qeth_l2_del_all_mc(struct qeth_card *card)
202 {
203 struct qeth_mc_mac *mc, *tmp;
204
205 spin_lock_bh(&card->mclock);
206 list_for_each_entry_safe(mc, tmp, &card->mc_list, list) {
207 if (mc->is_vmac)
208 qeth_l2_send_setdelmac(card, mc->mc_addr,
209 IPA_CMD_DELVMAC, NULL);
210 else
211 qeth_l2_send_delgroupmac(card, mc->mc_addr);
212 list_del(&mc->list);
213 kfree(mc);
214 }
215 spin_unlock_bh(&card->mclock);
216 }
217
218 static void qeth_l2_get_packet_type(struct qeth_card *card,
219 struct qeth_hdr *hdr, struct sk_buff *skb)
220 {
221 __u16 hdr_mac;
222
223 if (!memcmp(skb->data + QETH_HEADER_SIZE,
224 skb->dev->broadcast, 6)) {
225 /* broadcast? */
226 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
227 return;
228 }
229 hdr_mac = *((__u16 *)skb->data);
230 /* tr multicast? */
231 switch (card->info.link_type) {
232 case QETH_LINK_TYPE_HSTR:
233 case QETH_LINK_TYPE_LANE_TR:
234 if ((hdr_mac == QETH_TR_MAC_NC) ||
235 (hdr_mac == QETH_TR_MAC_C))
236 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
237 else
238 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
239 break;
240 /* eth or so multicast? */
241 default:
242 if ((hdr_mac == QETH_ETH_MAC_V4) ||
243 (hdr_mac == QETH_ETH_MAC_V6))
244 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
245 else
246 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
247 }
248 }
249
250 static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
251 struct sk_buff *skb, int ipv, int cast_type)
252 {
253 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
254
255 memset(hdr, 0, sizeof(struct qeth_hdr));
256 hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
257
258 /* set byte byte 3 to casting flags */
259 if (cast_type == RTN_MULTICAST)
260 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
261 else if (cast_type == RTN_BROADCAST)
262 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
263 else
264 qeth_l2_get_packet_type(card, hdr, skb);
265
266 hdr->hdr.l2.pkt_length = skb->len-QETH_HEADER_SIZE;
267 /* VSWITCH relies on the VLAN
268 * information to be present in
269 * the QDIO header */
270 if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
271 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
272 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
273 }
274 }
275
276 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
277 struct qeth_reply *reply, unsigned long data)
278 {
279 struct qeth_ipa_cmd *cmd;
280
281 QETH_DBF_TEXT(TRACE, 2, "L2sdvcb");
282 cmd = (struct qeth_ipa_cmd *) data;
283 if (cmd->hdr.return_code) {
284 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x. "
285 "Continuing\n", cmd->data.setdelvlan.vlan_id,
286 QETH_CARD_IFNAME(card), cmd->hdr.return_code);
287 QETH_DBF_TEXT_(TRACE, 2, "L2VL%4x", cmd->hdr.command);
288 QETH_DBF_TEXT_(TRACE, 2, "L2%s", CARD_BUS_ID(card));
289 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
290 }
291 return 0;
292 }
293
294 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
295 enum qeth_ipa_cmds ipacmd)
296 {
297 struct qeth_ipa_cmd *cmd;
298 struct qeth_cmd_buffer *iob;
299
300 QETH_DBF_TEXT_(TRACE, 4, "L2sdv%x", ipacmd);
301 iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
302 cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
303 cmd->data.setdelvlan.vlan_id = i;
304 return qeth_send_ipa_cmd(card, iob,
305 qeth_l2_send_setdelvlan_cb, NULL);
306 }
307
308 static void qeth_l2_process_vlans(struct qeth_card *card, int clear)
309 {
310 struct qeth_vlan_vid *id;
311 QETH_DBF_TEXT(TRACE, 3, "L2prcvln");
312 spin_lock_bh(&card->vlanlock);
313 list_for_each_entry(id, &card->vid_list, list) {
314 if (clear)
315 qeth_l2_send_setdelvlan(card, id->vid,
316 IPA_CMD_DELVLAN);
317 else
318 qeth_l2_send_setdelvlan(card, id->vid,
319 IPA_CMD_SETVLAN);
320 }
321 spin_unlock_bh(&card->vlanlock);
322 }
323
324 static void qeth_l2_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
325 {
326 struct qeth_card *card = dev->ml_priv;
327 struct qeth_vlan_vid *id;
328
329 QETH_DBF_TEXT_(TRACE, 4, "aid:%d", vid);
330 if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
331 QETH_DBF_TEXT(TRACE, 3, "aidREC");
332 return;
333 }
334 id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
335 if (id) {
336 id->vid = vid;
337 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
338 spin_lock_bh(&card->vlanlock);
339 list_add_tail(&id->list, &card->vid_list);
340 spin_unlock_bh(&card->vlanlock);
341 }
342 }
343
344 static void qeth_l2_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
345 {
346 struct qeth_vlan_vid *id, *tmpid = NULL;
347 struct qeth_card *card = dev->ml_priv;
348
349 QETH_DBF_TEXT_(TRACE, 4, "kid:%d", vid);
350 if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
351 QETH_DBF_TEXT(TRACE, 3, "kidREC");
352 return;
353 }
354 spin_lock_bh(&card->vlanlock);
355 list_for_each_entry(id, &card->vid_list, list) {
356 if (id->vid == vid) {
357 list_del(&id->list);
358 tmpid = id;
359 break;
360 }
361 }
362 spin_unlock_bh(&card->vlanlock);
363 if (tmpid) {
364 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
365 kfree(tmpid);
366 }
367 qeth_l2_set_multicast_list(card->dev);
368 }
369
370 static int qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
371 {
372 int rc = 0;
373
374 QETH_DBF_TEXT(SETUP , 2, "stopcard");
375 QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
376
377 qeth_set_allowed_threads(card, 0, 1);
378 if (card->read.state == CH_STATE_UP &&
379 card->write.state == CH_STATE_UP &&
380 (card->state == CARD_STATE_UP)) {
381 if (recovery_mode &&
382 card->info.type != QETH_CARD_TYPE_OSN) {
383 qeth_l2_stop(card->dev);
384 } else {
385 rtnl_lock();
386 dev_close(card->dev);
387 rtnl_unlock();
388 }
389 if (!card->use_hard_stop ||
390 recovery_mode) {
391 __u8 *mac = &card->dev->dev_addr[0];
392 rc = qeth_l2_send_delmac(card, mac);
393 QETH_DBF_TEXT_(SETUP, 2, "Lerr%d", rc);
394 }
395 card->state = CARD_STATE_SOFTSETUP;
396 }
397 if (card->state == CARD_STATE_SOFTSETUP) {
398 qeth_l2_process_vlans(card, 1);
399 if (!card->use_hard_stop ||
400 recovery_mode)
401 qeth_l2_del_all_mc(card);
402 qeth_clear_ipacmd_list(card);
403 card->state = CARD_STATE_HARDSETUP;
404 }
405 if (card->state == CARD_STATE_HARDSETUP) {
406 qeth_qdio_clear_card(card, 0);
407 qeth_clear_qdio_buffers(card);
408 qeth_clear_working_pool_list(card);
409 card->state = CARD_STATE_DOWN;
410 }
411 if (card->state == CARD_STATE_DOWN) {
412 qeth_clear_cmd_buffers(&card->read);
413 qeth_clear_cmd_buffers(&card->write);
414 }
415 card->use_hard_stop = 0;
416 return rc;
417 }
418
419 static void qeth_l2_process_inbound_buffer(struct qeth_card *card,
420 struct qeth_qdio_buffer *buf, int index)
421 {
422 struct qdio_buffer_element *element;
423 struct sk_buff *skb;
424 struct qeth_hdr *hdr;
425 int offset;
426 unsigned int len;
427
428 /* get first element of current buffer */
429 element = (struct qdio_buffer_element *)&buf->buffer->element[0];
430 offset = 0;
431 if (card->options.performance_stats)
432 card->perf_stats.bufs_rec++;
433 while ((skb = qeth_core_get_next_skb(card, buf->buffer, &element,
434 &offset, &hdr))) {
435 skb->dev = card->dev;
436 /* is device UP ? */
437 if (!(card->dev->flags & IFF_UP)) {
438 dev_kfree_skb_any(skb);
439 continue;
440 }
441
442 switch (hdr->hdr.l2.id) {
443 case QETH_HEADER_TYPE_LAYER2:
444 skb->pkt_type = PACKET_HOST;
445 skb->protocol = eth_type_trans(skb, skb->dev);
446 if (card->options.checksum_type == NO_CHECKSUMMING)
447 skb->ip_summed = CHECKSUM_UNNECESSARY;
448 else
449 skb->ip_summed = CHECKSUM_NONE;
450 if (skb->protocol == htons(ETH_P_802_2))
451 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
452 len = skb->len;
453 netif_rx(skb);
454 break;
455 case QETH_HEADER_TYPE_OSN:
456 if (card->info.type == QETH_CARD_TYPE_OSN) {
457 skb_push(skb, sizeof(struct qeth_hdr));
458 skb_copy_to_linear_data(skb, hdr,
459 sizeof(struct qeth_hdr));
460 len = skb->len;
461 card->osn_info.data_cb(skb);
462 break;
463 }
464 /* else unknown */
465 default:
466 dev_kfree_skb_any(skb);
467 QETH_DBF_TEXT(TRACE, 3, "inbunkno");
468 QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
469 continue;
470 }
471 card->dev->last_rx = jiffies;
472 card->stats.rx_packets++;
473 card->stats.rx_bytes += len;
474 }
475 }
476
477 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
478 enum qeth_ipa_cmds ipacmd,
479 int (*reply_cb) (struct qeth_card *,
480 struct qeth_reply*,
481 unsigned long))
482 {
483 struct qeth_ipa_cmd *cmd;
484 struct qeth_cmd_buffer *iob;
485
486 QETH_DBF_TEXT(TRACE, 2, "L2sdmac");
487 iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
488 cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
489 cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
490 memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
491 return qeth_send_ipa_cmd(card, iob, reply_cb, NULL);
492 }
493
494 static int qeth_l2_send_setmac_cb(struct qeth_card *card,
495 struct qeth_reply *reply,
496 unsigned long data)
497 {
498 struct qeth_ipa_cmd *cmd;
499
500 QETH_DBF_TEXT(TRACE, 2, "L2Smaccb");
501 cmd = (struct qeth_ipa_cmd *) data;
502 if (cmd->hdr.return_code) {
503 QETH_DBF_TEXT_(TRACE, 2, "L2er%x", cmd->hdr.return_code);
504 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
505 cmd->hdr.return_code = -EIO;
506 } else {
507 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
508 memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac,
509 OSA_ADDR_LEN);
510 dev_info(&card->gdev->dev,
511 "MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x "
512 "successfully registered on device %s\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 card->dev->name);
517 }
518 return 0;
519 }
520
521 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
522 {
523 QETH_DBF_TEXT(TRACE, 2, "L2Setmac");
524 return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
525 qeth_l2_send_setmac_cb);
526 }
527
528 static int qeth_l2_send_delmac_cb(struct qeth_card *card,
529 struct qeth_reply *reply,
530 unsigned long data)
531 {
532 struct qeth_ipa_cmd *cmd;
533
534 QETH_DBF_TEXT(TRACE, 2, "L2Dmaccb");
535 cmd = (struct qeth_ipa_cmd *) data;
536 if (cmd->hdr.return_code) {
537 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
538 cmd->hdr.return_code = -EIO;
539 return 0;
540 }
541 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
542
543 return 0;
544 }
545
546 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
547 {
548 QETH_DBF_TEXT(TRACE, 2, "L2Delmac");
549 if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
550 return 0;
551 return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC,
552 qeth_l2_send_delmac_cb);
553 }
554
555 static int qeth_l2_request_initial_mac(struct qeth_card *card)
556 {
557 int rc = 0;
558 char vendor_pre[] = {0x02, 0x00, 0x00};
559
560 QETH_DBF_TEXT(SETUP, 2, "doL2init");
561 QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
562
563 rc = qeth_query_setadapterparms(card);
564 if (rc) {
565 QETH_DBF_MESSAGE(2, "could not query adapter parameters on "
566 "device %s: x%x\n", CARD_BUS_ID(card), rc);
567 }
568
569 if ((card->info.type == QETH_CARD_TYPE_IQD) ||
570 (card->info.guestlan)) {
571 rc = qeth_setadpparms_change_macaddr(card);
572 if (rc) {
573 QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
574 "device %s: x%x\n", CARD_BUS_ID(card), rc);
575 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
576 return rc;
577 }
578 QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN);
579 } else {
580 random_ether_addr(card->dev->dev_addr);
581 memcpy(card->dev->dev_addr, vendor_pre, 3);
582 }
583 return 0;
584 }
585
586 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
587 {
588 struct sockaddr *addr = p;
589 struct qeth_card *card = dev->ml_priv;
590 int rc = 0;
591
592 QETH_DBF_TEXT(TRACE, 3, "setmac");
593
594 if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
595 QETH_DBF_TEXT(TRACE, 3, "setmcINV");
596 return -EOPNOTSUPP;
597 }
598
599 if (card->info.type == QETH_CARD_TYPE_OSN) {
600 QETH_DBF_TEXT(TRACE, 3, "setmcOSN");
601 return -EOPNOTSUPP;
602 }
603 QETH_DBF_TEXT_(TRACE, 3, "%s", CARD_BUS_ID(card));
604 QETH_DBF_HEX(TRACE, 3, addr->sa_data, OSA_ADDR_LEN);
605 if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
606 QETH_DBF_TEXT(TRACE, 3, "setmcREC");
607 return -ERESTARTSYS;
608 }
609 rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
610 if (!rc)
611 rc = qeth_l2_send_setmac(card, addr->sa_data);
612 return rc;
613 }
614
615 static void qeth_l2_set_multicast_list(struct net_device *dev)
616 {
617 struct qeth_card *card = dev->ml_priv;
618 struct dev_addr_list *dm;
619
620 if (card->info.type == QETH_CARD_TYPE_OSN)
621 return ;
622
623 QETH_DBF_TEXT(TRACE, 3, "setmulti");
624 if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
625 (card->state != CARD_STATE_UP))
626 return;
627 qeth_l2_del_all_mc(card);
628 spin_lock_bh(&card->mclock);
629 for (dm = dev->mc_list; dm; dm = dm->next)
630 qeth_l2_add_mc(card, dm->da_addr, 0);
631
632 for (dm = dev->uc_list; dm; dm = dm->next)
633 qeth_l2_add_mc(card, dm->da_addr, 1);
634
635 spin_unlock_bh(&card->mclock);
636 if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
637 return;
638 qeth_setadp_promisc_mode(card);
639 }
640
641 static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
642 {
643 int rc;
644 struct qeth_hdr *hdr = NULL;
645 int elements = 0;
646 struct qeth_card *card = dev->ml_priv;
647 struct sk_buff *new_skb = skb;
648 int ipv = qeth_get_ip_version(skb);
649 int cast_type = qeth_get_cast_type(card, skb);
650 struct qeth_qdio_out_q *queue = card->qdio.out_qs
651 [qeth_get_priority_queue(card, skb, ipv, cast_type)];
652 int tx_bytes = skb->len;
653 int data_offset = -1;
654 int elements_needed = 0;
655 int hd_len = 0;
656
657 if ((card->state != CARD_STATE_UP) || !card->lan_online) {
658 card->stats.tx_carrier_errors++;
659 goto tx_drop;
660 }
661
662 if ((card->info.type == QETH_CARD_TYPE_OSN) &&
663 (skb->protocol == htons(ETH_P_IPV6)))
664 goto tx_drop;
665
666 if (card->options.performance_stats) {
667 card->perf_stats.outbound_cnt++;
668 card->perf_stats.outbound_start_time = qeth_get_micros();
669 }
670 netif_stop_queue(dev);
671
672 if (card->info.type == QETH_CARD_TYPE_OSN)
673 hdr = (struct qeth_hdr *)skb->data;
674 else {
675 if (card->info.type == QETH_CARD_TYPE_IQD) {
676 new_skb = skb;
677 data_offset = ETH_HLEN;
678 hd_len = ETH_HLEN;
679 hdr = kmem_cache_alloc(qeth_core_header_cache,
680 GFP_ATOMIC);
681 if (!hdr)
682 goto tx_drop;
683 elements_needed++;
684 skb_reset_mac_header(new_skb);
685 qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
686 hdr->hdr.l2.pkt_length = new_skb->len;
687 memcpy(((char *)hdr) + sizeof(struct qeth_hdr),
688 skb_mac_header(new_skb), ETH_HLEN);
689 } else {
690 /* create a clone with writeable headroom */
691 new_skb = skb_realloc_headroom(skb,
692 sizeof(struct qeth_hdr));
693 if (!new_skb)
694 goto tx_drop;
695 hdr = (struct qeth_hdr *)skb_push(new_skb,
696 sizeof(struct qeth_hdr));
697 skb_set_mac_header(new_skb, sizeof(struct qeth_hdr));
698 qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
699 }
700 }
701
702 elements = qeth_get_elements_no(card, (void *)hdr, new_skb,
703 elements_needed);
704 if (!elements) {
705 if (data_offset >= 0)
706 kmem_cache_free(qeth_core_header_cache, hdr);
707 goto tx_drop;
708 }
709
710 if (card->info.type != QETH_CARD_TYPE_IQD)
711 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
712 elements);
713 else
714 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
715 elements, data_offset, hd_len);
716 if (!rc) {
717 card->stats.tx_packets++;
718 card->stats.tx_bytes += tx_bytes;
719 if (new_skb != skb)
720 dev_kfree_skb_any(skb);
721 } else {
722 if (data_offset >= 0)
723 kmem_cache_free(qeth_core_header_cache, hdr);
724
725 if (rc == -EBUSY) {
726 if (new_skb != skb)
727 dev_kfree_skb_any(new_skb);
728 return NETDEV_TX_BUSY;
729 } else
730 goto tx_drop;
731 }
732
733 netif_wake_queue(dev);
734 if (card->options.performance_stats)
735 card->perf_stats.outbound_time += qeth_get_micros() -
736 card->perf_stats.outbound_start_time;
737 return rc;
738
739 tx_drop:
740 card->stats.tx_dropped++;
741 card->stats.tx_errors++;
742 if ((new_skb != skb) && new_skb)
743 dev_kfree_skb_any(new_skb);
744 dev_kfree_skb_any(skb);
745 netif_wake_queue(dev);
746 return NETDEV_TX_OK;
747 }
748
749 static void qeth_l2_qdio_input_handler(struct ccw_device *ccwdev,
750 unsigned int qdio_err, unsigned int queue,
751 int first_element, int count, unsigned long card_ptr)
752 {
753 struct net_device *net_dev;
754 struct qeth_card *card;
755 struct qeth_qdio_buffer *buffer;
756 int index;
757 int i;
758
759 card = (struct qeth_card *) card_ptr;
760 net_dev = card->dev;
761 if (card->options.performance_stats) {
762 card->perf_stats.inbound_cnt++;
763 card->perf_stats.inbound_start_time = qeth_get_micros();
764 }
765 if (qdio_err & QDIO_ERROR_ACTIVATE_CHECK_CONDITION) {
766 QETH_DBF_TEXT(TRACE, 1, "qdinchk");
767 QETH_DBF_TEXT_(TRACE, 1, "%s", CARD_BUS_ID(card));
768 QETH_DBF_TEXT_(TRACE, 1, "%04X%04X", first_element,
769 count);
770 QETH_DBF_TEXT_(TRACE, 1, "%04X", queue);
771 qeth_schedule_recovery(card);
772 return;
773 }
774 for (i = first_element; i < (first_element + count); ++i) {
775 index = i % QDIO_MAX_BUFFERS_PER_Q;
776 buffer = &card->qdio.in_q->bufs[index];
777 if (!(qdio_err &&
778 qeth_check_qdio_errors(buffer->buffer, qdio_err, "qinerr")))
779 qeth_l2_process_inbound_buffer(card, buffer, index);
780 /* clear buffer and give back to hardware */
781 qeth_put_buffer_pool_entry(card, buffer->pool_entry);
782 qeth_queue_input_buffer(card, index);
783 }
784 if (card->options.performance_stats)
785 card->perf_stats.inbound_time += qeth_get_micros() -
786 card->perf_stats.inbound_start_time;
787 }
788
789 static int qeth_l2_open(struct net_device *dev)
790 {
791 struct qeth_card *card = dev->ml_priv;
792
793 QETH_DBF_TEXT(TRACE, 4, "qethopen");
794 if (card->state != CARD_STATE_SOFTSETUP)
795 return -ENODEV;
796
797 if ((card->info.type != QETH_CARD_TYPE_OSN) &&
798 (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
799 QETH_DBF_TEXT(TRACE, 4, "nomacadr");
800 return -EPERM;
801 }
802 card->data.state = CH_STATE_UP;
803 card->state = CARD_STATE_UP;
804 netif_start_queue(dev);
805
806 if (!card->lan_online && netif_carrier_ok(dev))
807 netif_carrier_off(dev);
808 return 0;
809 }
810
811
812 static int qeth_l2_stop(struct net_device *dev)
813 {
814 struct qeth_card *card = dev->ml_priv;
815
816 QETH_DBF_TEXT(TRACE, 4, "qethstop");
817 netif_tx_disable(dev);
818 if (card->state == CARD_STATE_UP)
819 card->state = CARD_STATE_SOFTSETUP;
820 return 0;
821 }
822
823 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
824 {
825 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
826
827 INIT_LIST_HEAD(&card->vid_list);
828 INIT_LIST_HEAD(&card->mc_list);
829 card->options.layer2 = 1;
830 card->discipline.input_handler = (qdio_handler_t *)
831 qeth_l2_qdio_input_handler;
832 card->discipline.output_handler = (qdio_handler_t *)
833 qeth_qdio_output_handler;
834 card->discipline.recover = qeth_l2_recover;
835 return 0;
836 }
837
838 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
839 {
840 struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
841
842 wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
843
844 if (cgdev->state == CCWGROUP_ONLINE) {
845 card->use_hard_stop = 1;
846 qeth_l2_set_offline(cgdev);
847 }
848
849 if (card->dev) {
850 unregister_netdev(card->dev);
851 card->dev = NULL;
852 }
853
854 qeth_l2_del_all_mc(card);
855 return;
856 }
857
858 static struct ethtool_ops qeth_l2_ethtool_ops = {
859 .get_link = ethtool_op_get_link,
860 .get_strings = qeth_core_get_strings,
861 .get_ethtool_stats = qeth_core_get_ethtool_stats,
862 .get_stats_count = qeth_core_get_stats_count,
863 .get_drvinfo = qeth_core_get_drvinfo,
864 .get_settings = qeth_core_ethtool_get_settings,
865 };
866
867 static struct ethtool_ops qeth_l2_osn_ops = {
868 .get_strings = qeth_core_get_strings,
869 .get_ethtool_stats = qeth_core_get_ethtool_stats,
870 .get_stats_count = qeth_core_get_stats_count,
871 .get_drvinfo = qeth_core_get_drvinfo,
872 };
873
874 static const struct net_device_ops qeth_l2_netdev_ops = {
875 .ndo_open = qeth_l2_open,
876 .ndo_stop = qeth_l2_stop,
877 .ndo_get_stats = qeth_get_stats,
878 .ndo_start_xmit = qeth_l2_hard_start_xmit,
879 .ndo_validate_addr = eth_validate_addr,
880 .ndo_set_multicast_list = qeth_l2_set_multicast_list,
881 .ndo_do_ioctl = qeth_l2_do_ioctl,
882 .ndo_set_mac_address = qeth_l2_set_mac_address,
883 .ndo_change_mtu = qeth_change_mtu,
884 .ndo_vlan_rx_add_vid = qeth_l2_vlan_rx_add_vid,
885 .ndo_vlan_rx_kill_vid = qeth_l2_vlan_rx_kill_vid,
886 .ndo_tx_timeout = qeth_tx_timeout,
887 };
888
889 static int qeth_l2_setup_netdev(struct qeth_card *card)
890 {
891 switch (card->info.type) {
892 case QETH_CARD_TYPE_OSAE:
893 card->dev = alloc_etherdev(0);
894 break;
895 case QETH_CARD_TYPE_IQD:
896 card->dev = alloc_netdev(0, "hsi%d", ether_setup);
897 break;
898 case QETH_CARD_TYPE_OSN:
899 card->dev = alloc_netdev(0, "osn%d", ether_setup);
900 card->dev->flags |= IFF_NOARP;
901 break;
902 default:
903 card->dev = alloc_etherdev(0);
904 }
905
906 if (!card->dev)
907 return -ENODEV;
908
909 card->dev->ml_priv = card;
910 card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
911 card->dev->mtu = card->info.initial_mtu;
912 card->dev->netdev_ops = &qeth_l2_netdev_ops;
913 if (card->info.type != QETH_CARD_TYPE_OSN)
914 SET_ETHTOOL_OPS(card->dev, &qeth_l2_ethtool_ops);
915 else
916 SET_ETHTOOL_OPS(card->dev, &qeth_l2_osn_ops);
917 card->dev->features |= NETIF_F_HW_VLAN_FILTER;
918 card->info.broadcast_capable = 1;
919 qeth_l2_request_initial_mac(card);
920 SET_NETDEV_DEV(card->dev, &card->gdev->dev);
921 return register_netdev(card->dev);
922 }
923
924 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
925 {
926 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
927 int rc = 0;
928 enum qeth_card_states recover_flag;
929
930 BUG_ON(!card);
931 QETH_DBF_TEXT(SETUP, 2, "setonlin");
932 QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
933
934 qeth_set_allowed_threads(card, QETH_RECOVER_THREAD, 1);
935 recover_flag = card->state;
936 rc = ccw_device_set_online(CARD_RDEV(card));
937 if (rc) {
938 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
939 return -EIO;
940 }
941 rc = ccw_device_set_online(CARD_WDEV(card));
942 if (rc) {
943 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
944 return -EIO;
945 }
946 rc = ccw_device_set_online(CARD_DDEV(card));
947 if (rc) {
948 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
949 return -EIO;
950 }
951
952 rc = qeth_core_hardsetup_card(card);
953 if (rc) {
954 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
955 goto out_remove;
956 }
957
958 if (!card->dev && qeth_l2_setup_netdev(card))
959 goto out_remove;
960
961 if (card->info.type != QETH_CARD_TYPE_OSN)
962 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
963
964 card->state = CARD_STATE_HARDSETUP;
965 qeth_print_status_message(card);
966
967 /* softsetup */
968 QETH_DBF_TEXT(SETUP, 2, "softsetp");
969
970 rc = qeth_send_startlan(card);
971 if (rc) {
972 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
973 if (rc == 0xe080) {
974 dev_warn(&card->gdev->dev,
975 "The LAN is offline\n");
976 card->lan_online = 0;
977 }
978 return rc;
979 } else
980 card->lan_online = 1;
981
982 if (card->info.type != QETH_CARD_TYPE_OSN) {
983 qeth_set_large_send(card, card->options.large_send);
984 qeth_l2_process_vlans(card, 0);
985 }
986
987 netif_tx_disable(card->dev);
988
989 rc = qeth_init_qdio_queues(card);
990 if (rc) {
991 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
992 goto out_remove;
993 }
994 card->state = CARD_STATE_SOFTSETUP;
995 netif_carrier_on(card->dev);
996
997 qeth_set_allowed_threads(card, 0xffffffff, 0);
998 if (recover_flag == CARD_STATE_RECOVER) {
999 if (recovery_mode &&
1000 card->info.type != QETH_CARD_TYPE_OSN) {
1001 qeth_l2_open(card->dev);
1002 } else {
1003 rtnl_lock();
1004 dev_open(card->dev);
1005 rtnl_unlock();
1006 }
1007 /* this also sets saved unicast addresses */
1008 qeth_l2_set_multicast_list(card->dev);
1009 }
1010 /* let user_space know that device is online */
1011 kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1012 return 0;
1013 out_remove:
1014 card->use_hard_stop = 1;
1015 qeth_l2_stop_card(card, 0);
1016 ccw_device_set_offline(CARD_DDEV(card));
1017 ccw_device_set_offline(CARD_WDEV(card));
1018 ccw_device_set_offline(CARD_RDEV(card));
1019 if (recover_flag == CARD_STATE_RECOVER)
1020 card->state = CARD_STATE_RECOVER;
1021 else
1022 card->state = CARD_STATE_DOWN;
1023 return -ENODEV;
1024 }
1025
1026 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1027 {
1028 return __qeth_l2_set_online(gdev, 0);
1029 }
1030
1031 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1032 int recovery_mode)
1033 {
1034 struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1035 int rc = 0, rc2 = 0, rc3 = 0;
1036 enum qeth_card_states recover_flag;
1037
1038 QETH_DBF_TEXT(SETUP, 3, "setoffl");
1039 QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1040
1041 if (card->dev && netif_carrier_ok(card->dev))
1042 netif_carrier_off(card->dev);
1043 recover_flag = card->state;
1044 qeth_l2_stop_card(card, recovery_mode);
1045 rc = ccw_device_set_offline(CARD_DDEV(card));
1046 rc2 = ccw_device_set_offline(CARD_WDEV(card));
1047 rc3 = ccw_device_set_offline(CARD_RDEV(card));
1048 if (!rc)
1049 rc = (rc2) ? rc2 : rc3;
1050 if (rc)
1051 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1052 if (recover_flag == CARD_STATE_UP)
1053 card->state = CARD_STATE_RECOVER;
1054 /* let user_space know that device is offline */
1055 kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1056 return 0;
1057 }
1058
1059 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1060 {
1061 return __qeth_l2_set_offline(cgdev, 0);
1062 }
1063
1064 static int qeth_l2_recover(void *ptr)
1065 {
1066 struct qeth_card *card;
1067 int rc = 0;
1068
1069 card = (struct qeth_card *) ptr;
1070 QETH_DBF_TEXT(TRACE, 2, "recover1");
1071 QETH_DBF_HEX(TRACE, 2, &card, sizeof(void *));
1072 if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1073 return 0;
1074 QETH_DBF_TEXT(TRACE, 2, "recover2");
1075 dev_warn(&card->gdev->dev,
1076 "A recovery process has been started for the device\n");
1077 card->use_hard_stop = 1;
1078 __qeth_l2_set_offline(card->gdev, 1);
1079 rc = __qeth_l2_set_online(card->gdev, 1);
1080 /* don't run another scheduled recovery */
1081 qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1082 qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1083 if (!rc)
1084 dev_info(&card->gdev->dev,
1085 "Device successfully recovered!\n");
1086 else {
1087 if (card->dev) {
1088 rtnl_lock();
1089 dev_close(card->dev);
1090 rtnl_unlock();
1091 }
1092 dev_warn(&card->gdev->dev, "The qeth device driver "
1093 "failed to recover an error on the device\n");
1094 }
1095 return 0;
1096 }
1097
1098 static int __init qeth_l2_init(void)
1099 {
1100 pr_info("register layer 2 discipline\n");
1101 return 0;
1102 }
1103
1104 static void __exit qeth_l2_exit(void)
1105 {
1106 pr_info("unregister layer 2 discipline\n");
1107 }
1108
1109 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1110 {
1111 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1112 qeth_qdio_clear_card(card, 0);
1113 qeth_clear_qdio_buffers(card);
1114 }
1115
1116 struct ccwgroup_driver qeth_l2_ccwgroup_driver = {
1117 .probe = qeth_l2_probe_device,
1118 .remove = qeth_l2_remove_device,
1119 .set_online = qeth_l2_set_online,
1120 .set_offline = qeth_l2_set_offline,
1121 .shutdown = qeth_l2_shutdown,
1122 };
1123 EXPORT_SYMBOL_GPL(qeth_l2_ccwgroup_driver);
1124
1125 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1126 struct qeth_cmd_buffer *iob)
1127 {
1128 unsigned long flags;
1129 int rc = 0;
1130
1131 QETH_DBF_TEXT(TRACE, 5, "osndctrd");
1132
1133 wait_event(card->wait_q,
1134 atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1135 qeth_prepare_control_data(card, len, iob);
1136 QETH_DBF_TEXT(TRACE, 6, "osnoirqp");
1137 spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1138 rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1139 (addr_t) iob, 0, 0);
1140 spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1141 if (rc) {
1142 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1143 "ccw_device_start rc = %i\n", rc);
1144 QETH_DBF_TEXT_(TRACE, 2, " err%d", rc);
1145 qeth_release_buffer(iob->channel, iob);
1146 atomic_set(&card->write.irq_pending, 0);
1147 wake_up(&card->wait_q);
1148 }
1149 return rc;
1150 }
1151
1152 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1153 struct qeth_cmd_buffer *iob, int data_len)
1154 {
1155 u16 s1, s2;
1156
1157 QETH_DBF_TEXT(TRACE, 4, "osndipa");
1158
1159 qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1160 s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1161 s2 = (u16)data_len;
1162 memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1163 memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1164 memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1165 memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1166 return qeth_osn_send_control_data(card, s1, iob);
1167 }
1168
1169 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1170 {
1171 struct qeth_cmd_buffer *iob;
1172 struct qeth_card *card;
1173 int rc;
1174
1175 QETH_DBF_TEXT(TRACE, 2, "osnsdmc");
1176 if (!dev)
1177 return -ENODEV;
1178 card = dev->ml_priv;
1179 if (!card)
1180 return -ENODEV;
1181 if ((card->state != CARD_STATE_UP) &&
1182 (card->state != CARD_STATE_SOFTSETUP))
1183 return -ENODEV;
1184 iob = qeth_wait_for_buffer(&card->write);
1185 memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1186 rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1187 return rc;
1188 }
1189 EXPORT_SYMBOL(qeth_osn_assist);
1190
1191 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1192 int (*assist_cb)(struct net_device *, void *),
1193 int (*data_cb)(struct sk_buff *))
1194 {
1195 struct qeth_card *card;
1196
1197 QETH_DBF_TEXT(TRACE, 2, "osnreg");
1198 *dev = qeth_l2_netdev_by_devno(read_dev_no);
1199 if (*dev == NULL)
1200 return -ENODEV;
1201 card = (*dev)->ml_priv;
1202 if (!card)
1203 return -ENODEV;
1204 if ((assist_cb == NULL) || (data_cb == NULL))
1205 return -EINVAL;
1206 card->osn_info.assist_cb = assist_cb;
1207 card->osn_info.data_cb = data_cb;
1208 return 0;
1209 }
1210 EXPORT_SYMBOL(qeth_osn_register);
1211
1212 void qeth_osn_deregister(struct net_device *dev)
1213 {
1214 struct qeth_card *card;
1215
1216 QETH_DBF_TEXT(TRACE, 2, "osndereg");
1217 if (!dev)
1218 return;
1219 card = dev->ml_priv;
1220 if (!card)
1221 return;
1222 card->osn_info.assist_cb = NULL;
1223 card->osn_info.data_cb = NULL;
1224 return;
1225 }
1226 EXPORT_SYMBOL(qeth_osn_deregister);
1227
1228 module_init(qeth_l2_init);
1229 module_exit(qeth_l2_exit);
1230 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1231 MODULE_DESCRIPTION("qeth layer 2 discipline");
1232 MODULE_LICENSE("GPL");
linux kernel for loongson