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[mirror_ubuntu-artful-kernel.git] / drivers / s390 / net / qeth_l2_main.c
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 #include <linux/module.h>
12 #include <linux/moduleparam.h>
13 #include <linux/string.h>
14 #include <linux/errno.h>
15 #include <linux/kernel.h>
16 #include <linux/etherdevice.h>
17 #include <linux/mii.h>
18 #include <linux/ip.h>
19
20 #include <asm/s390_rdev.h>
21
22 #include "qeth_core.h"
23 #include "qeth_core_offl.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 %02x:%02x:%02x:%02x:%02x:%02x "
135 "already existing on %s \n",
136 mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
137 QETH_CARD_IFNAME(card));
138 cmd->hdr.return_code = 0;
139 }
140 if (cmd->hdr.return_code)
141 QETH_DBF_MESSAGE(2, "Could not set group MAC "
142 "%02x:%02x:%02x:%02x:%02x:%02x on %s: %x\n",
143 mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
144 QETH_CARD_IFNAME(card), cmd->hdr.return_code);
145 return 0;
146 }
147
148 static int qeth_l2_send_setgroupmac(struct qeth_card *card, __u8 *mac)
149 {
150 QETH_DBF_TEXT(TRACE, 2, "L2Sgmac");
151 return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETGMAC,
152 qeth_l2_send_setgroupmac_cb);
153 }
154
155 static int qeth_l2_send_delgroupmac_cb(struct qeth_card *card,
156 struct qeth_reply *reply,
157 unsigned long data)
158 {
159 struct qeth_ipa_cmd *cmd;
160 __u8 *mac;
161
162 QETH_DBF_TEXT(TRACE, 2, "L2Dgmacb");
163 cmd = (struct qeth_ipa_cmd *) data;
164 mac = &cmd->data.setdelmac.mac[0];
165 if (cmd->hdr.return_code)
166 QETH_DBF_MESSAGE(2, "Could not delete group MAC "
167 "%02x:%02x:%02x:%02x:%02x:%02x on %s: %x\n",
168 mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
169 QETH_CARD_IFNAME(card), cmd->hdr.return_code);
170 return 0;
171 }
172
173 static int qeth_l2_send_delgroupmac(struct qeth_card *card, __u8 *mac)
174 {
175 QETH_DBF_TEXT(TRACE, 2, "L2Dgmac");
176 return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELGMAC,
177 qeth_l2_send_delgroupmac_cb);
178 }
179
180 static void qeth_l2_add_mc(struct qeth_card *card, __u8 *mac, int vmac)
181 {
182 struct qeth_mc_mac *mc;
183 int rc;
184
185 mc = kmalloc(sizeof(struct qeth_mc_mac), GFP_ATOMIC);
186
187 if (!mc)
188 return;
189
190 memcpy(mc->mc_addr, mac, OSA_ADDR_LEN);
191 mc->mc_addrlen = OSA_ADDR_LEN;
192 mc->is_vmac = vmac;
193
194 if (vmac) {
195 rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
196 NULL);
197 } else {
198 rc = qeth_l2_send_setgroupmac(card, mac);
199 }
200
201 if (!rc)
202 list_add_tail(&mc->list, &card->mc_list);
203 else
204 kfree(mc);
205 }
206
207 static void qeth_l2_del_all_mc(struct qeth_card *card)
208 {
209 struct qeth_mc_mac *mc, *tmp;
210
211 spin_lock_bh(&card->mclock);
212 list_for_each_entry_safe(mc, tmp, &card->mc_list, list) {
213 if (mc->is_vmac)
214 qeth_l2_send_setdelmac(card, mc->mc_addr,
215 IPA_CMD_DELVMAC, NULL);
216 else
217 qeth_l2_send_delgroupmac(card, mc->mc_addr);
218 list_del(&mc->list);
219 kfree(mc);
220 }
221 spin_unlock_bh(&card->mclock);
222 }
223
224 static void qeth_l2_get_packet_type(struct qeth_card *card,
225 struct qeth_hdr *hdr, struct sk_buff *skb)
226 {
227 __u16 hdr_mac;
228
229 if (!memcmp(skb->data + QETH_HEADER_SIZE,
230 skb->dev->broadcast, 6)) {
231 /* broadcast? */
232 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
233 return;
234 }
235 hdr_mac = *((__u16 *)skb->data);
236 /* tr multicast? */
237 switch (card->info.link_type) {
238 case QETH_LINK_TYPE_HSTR:
239 case QETH_LINK_TYPE_LANE_TR:
240 if ((hdr_mac == QETH_TR_MAC_NC) ||
241 (hdr_mac == QETH_TR_MAC_C))
242 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
243 else
244 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
245 break;
246 /* eth or so multicast? */
247 default:
248 if ((hdr_mac == QETH_ETH_MAC_V4) ||
249 (hdr_mac == QETH_ETH_MAC_V6))
250 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
251 else
252 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
253 }
254 }
255
256 static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
257 struct sk_buff *skb, int ipv, int cast_type)
258 {
259 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
260
261 memset(hdr, 0, sizeof(struct qeth_hdr));
262 hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
263
264 /* set byte byte 3 to casting flags */
265 if (cast_type == RTN_MULTICAST)
266 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
267 else if (cast_type == RTN_BROADCAST)
268 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
269 else
270 qeth_l2_get_packet_type(card, hdr, skb);
271
272 hdr->hdr.l2.pkt_length = skb->len-QETH_HEADER_SIZE;
273 /* VSWITCH relies on the VLAN
274 * information to be present in
275 * the QDIO header */
276 if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
277 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
278 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
279 }
280 }
281
282 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
283 struct qeth_reply *reply, unsigned long data)
284 {
285 struct qeth_ipa_cmd *cmd;
286
287 QETH_DBF_TEXT(TRACE, 2, "L2sdvcb");
288 cmd = (struct qeth_ipa_cmd *) data;
289 if (cmd->hdr.return_code) {
290 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x. "
291 "Continuing\n", cmd->data.setdelvlan.vlan_id,
292 QETH_CARD_IFNAME(card), cmd->hdr.return_code);
293 QETH_DBF_TEXT_(TRACE, 2, "L2VL%4x", cmd->hdr.command);
294 QETH_DBF_TEXT_(TRACE, 2, "L2%s", CARD_BUS_ID(card));
295 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
296 }
297 return 0;
298 }
299
300 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
301 enum qeth_ipa_cmds ipacmd)
302 {
303 struct qeth_ipa_cmd *cmd;
304 struct qeth_cmd_buffer *iob;
305
306 QETH_DBF_TEXT_(TRACE, 4, "L2sdv%x", ipacmd);
307 iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
308 cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
309 cmd->data.setdelvlan.vlan_id = i;
310 return qeth_send_ipa_cmd(card, iob,
311 qeth_l2_send_setdelvlan_cb, NULL);
312 }
313
314 static void qeth_l2_process_vlans(struct qeth_card *card, int clear)
315 {
316 struct qeth_vlan_vid *id;
317 QETH_DBF_TEXT(TRACE, 3, "L2prcvln");
318 spin_lock_bh(&card->vlanlock);
319 list_for_each_entry(id, &card->vid_list, list) {
320 if (clear)
321 qeth_l2_send_setdelvlan(card, id->vid,
322 IPA_CMD_DELVLAN);
323 else
324 qeth_l2_send_setdelvlan(card, id->vid,
325 IPA_CMD_SETVLAN);
326 }
327 spin_unlock_bh(&card->vlanlock);
328 }
329
330 static void qeth_l2_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
331 {
332 struct qeth_card *card = dev->ml_priv;
333 struct qeth_vlan_vid *id;
334
335 QETH_DBF_TEXT_(TRACE, 4, "aid:%d", vid);
336 id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
337 if (id) {
338 id->vid = vid;
339 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
340 spin_lock_bh(&card->vlanlock);
341 list_add_tail(&id->list, &card->vid_list);
342 spin_unlock_bh(&card->vlanlock);
343 }
344 }
345
346 static void qeth_l2_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
347 {
348 struct qeth_vlan_vid *id, *tmpid = NULL;
349 struct qeth_card *card = dev->ml_priv;
350
351 QETH_DBF_TEXT_(TRACE, 4, "kid:%d", vid);
352 spin_lock_bh(&card->vlanlock);
353 list_for_each_entry(id, &card->vid_list, list) {
354 if (id->vid == vid) {
355 list_del(&id->list);
356 tmpid = id;
357 break;
358 }
359 }
360 spin_unlock_bh(&card->vlanlock);
361 if (tmpid) {
362 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
363 kfree(tmpid);
364 }
365 qeth_l2_set_multicast_list(card->dev);
366 }
367
368 static int qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
369 {
370 int rc = 0;
371
372 QETH_DBF_TEXT(SETUP , 2, "stopcard");
373 QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
374
375 qeth_set_allowed_threads(card, 0, 1);
376 if (card->read.state == CH_STATE_UP &&
377 card->write.state == CH_STATE_UP &&
378 (card->state == CARD_STATE_UP)) {
379 if (recovery_mode &&
380 card->info.type != QETH_CARD_TYPE_OSN) {
381 qeth_l2_stop(card->dev);
382 } else {
383 rtnl_lock();
384 dev_close(card->dev);
385 rtnl_unlock();
386 }
387 if (!card->use_hard_stop) {
388 __u8 *mac = &card->dev->dev_addr[0];
389 rc = qeth_l2_send_delmac(card, mac);
390 QETH_DBF_TEXT_(SETUP, 2, "Lerr%d", rc);
391 }
392 card->state = CARD_STATE_SOFTSETUP;
393 }
394 if (card->state == CARD_STATE_SOFTSETUP) {
395 qeth_l2_process_vlans(card, 1);
396 if (!card->use_hard_stop)
397 qeth_l2_del_all_mc(card);
398 qeth_clear_ipacmd_list(card);
399 card->state = CARD_STATE_HARDSETUP;
400 }
401 if (card->state == CARD_STATE_HARDSETUP) {
402 qeth_qdio_clear_card(card, 0);
403 qeth_clear_qdio_buffers(card);
404 qeth_clear_working_pool_list(card);
405 card->state = CARD_STATE_DOWN;
406 }
407 if (card->state == CARD_STATE_DOWN) {
408 qeth_clear_cmd_buffers(&card->read);
409 qeth_clear_cmd_buffers(&card->write);
410 }
411 card->use_hard_stop = 0;
412 return rc;
413 }
414
415 static void qeth_l2_process_inbound_buffer(struct qeth_card *card,
416 struct qeth_qdio_buffer *buf, int index)
417 {
418 struct qdio_buffer_element *element;
419 struct sk_buff *skb;
420 struct qeth_hdr *hdr;
421 int offset;
422 unsigned int len;
423
424 /* get first element of current buffer */
425 element = (struct qdio_buffer_element *)&buf->buffer->element[0];
426 offset = 0;
427 if (card->options.performance_stats)
428 card->perf_stats.bufs_rec++;
429 while ((skb = qeth_core_get_next_skb(card, buf->buffer, &element,
430 &offset, &hdr))) {
431 skb->dev = card->dev;
432 /* is device UP ? */
433 if (!(card->dev->flags & IFF_UP)) {
434 dev_kfree_skb_any(skb);
435 continue;
436 }
437
438 switch (hdr->hdr.l2.id) {
439 case QETH_HEADER_TYPE_LAYER2:
440 skb->pkt_type = PACKET_HOST;
441 skb->protocol = eth_type_trans(skb, skb->dev);
442 if (card->options.checksum_type == NO_CHECKSUMMING)
443 skb->ip_summed = CHECKSUM_UNNECESSARY;
444 else
445 skb->ip_summed = CHECKSUM_NONE;
446 if (skb->protocol == htons(ETH_P_802_2))
447 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
448 len = skb->len;
449 netif_rx(skb);
450 break;
451 case QETH_HEADER_TYPE_OSN:
452 skb_push(skb, sizeof(struct qeth_hdr));
453 skb_copy_to_linear_data(skb, hdr,
454 sizeof(struct qeth_hdr));
455 len = skb->len;
456 card->osn_info.data_cb(skb);
457 break;
458 default:
459 dev_kfree_skb_any(skb);
460 QETH_DBF_TEXT(TRACE, 3, "inbunkno");
461 QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
462 continue;
463 }
464 card->dev->last_rx = jiffies;
465 card->stats.rx_packets++;
466 card->stats.rx_bytes += len;
467 }
468 }
469
470 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
471 enum qeth_ipa_cmds ipacmd,
472 int (*reply_cb) (struct qeth_card *,
473 struct qeth_reply*,
474 unsigned long))
475 {
476 struct qeth_ipa_cmd *cmd;
477 struct qeth_cmd_buffer *iob;
478
479 QETH_DBF_TEXT(TRACE, 2, "L2sdmac");
480 iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
481 cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
482 cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
483 memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
484 return qeth_send_ipa_cmd(card, iob, reply_cb, NULL);
485 }
486
487 static int qeth_l2_send_setmac_cb(struct qeth_card *card,
488 struct qeth_reply *reply,
489 unsigned long data)
490 {
491 struct qeth_ipa_cmd *cmd;
492
493 QETH_DBF_TEXT(TRACE, 2, "L2Smaccb");
494 cmd = (struct qeth_ipa_cmd *) data;
495 if (cmd->hdr.return_code) {
496 QETH_DBF_TEXT_(TRACE, 2, "L2er%x", cmd->hdr.return_code);
497 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
498 cmd->hdr.return_code = -EIO;
499 } else {
500 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
501 memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac,
502 OSA_ADDR_LEN);
503 PRINT_INFO("MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x "
504 "successfully registered on device %s\n",
505 card->dev->dev_addr[0], card->dev->dev_addr[1],
506 card->dev->dev_addr[2], card->dev->dev_addr[3],
507 card->dev->dev_addr[4], card->dev->dev_addr[5],
508 card->dev->name);
509 }
510 return 0;
511 }
512
513 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
514 {
515 QETH_DBF_TEXT(TRACE, 2, "L2Setmac");
516 return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
517 qeth_l2_send_setmac_cb);
518 }
519
520 static int qeth_l2_send_delmac_cb(struct qeth_card *card,
521 struct qeth_reply *reply,
522 unsigned long data)
523 {
524 struct qeth_ipa_cmd *cmd;
525
526 QETH_DBF_TEXT(TRACE, 2, "L2Dmaccb");
527 cmd = (struct qeth_ipa_cmd *) data;
528 if (cmd->hdr.return_code) {
529 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
530 cmd->hdr.return_code = -EIO;
531 return 0;
532 }
533 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
534
535 return 0;
536 }
537
538 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
539 {
540 QETH_DBF_TEXT(TRACE, 2, "L2Delmac");
541 if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
542 return 0;
543 return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC,
544 qeth_l2_send_delmac_cb);
545 }
546
547 static int qeth_l2_request_initial_mac(struct qeth_card *card)
548 {
549 int rc = 0;
550 char vendor_pre[] = {0x02, 0x00, 0x00};
551
552 QETH_DBF_TEXT(SETUP, 2, "doL2init");
553 QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
554
555 rc = qeth_query_setadapterparms(card);
556 if (rc) {
557 QETH_DBF_MESSAGE(2, "could not query adapter parameters on "
558 "device %s: x%x\n", CARD_BUS_ID(card), rc);
559 }
560
561 if ((card->info.type == QETH_CARD_TYPE_IQD) ||
562 (card->info.guestlan)) {
563 rc = qeth_setadpparms_change_macaddr(card);
564 if (rc) {
565 QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
566 "device %s: x%x\n", CARD_BUS_ID(card), rc);
567 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
568 return rc;
569 }
570 QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN);
571 } else {
572 random_ether_addr(card->dev->dev_addr);
573 memcpy(card->dev->dev_addr, vendor_pre, 3);
574 }
575 return 0;
576 }
577
578 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
579 {
580 struct sockaddr *addr = p;
581 struct qeth_card *card = dev->ml_priv;
582 int rc = 0;
583
584 QETH_DBF_TEXT(TRACE, 3, "setmac");
585
586 if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
587 QETH_DBF_TEXT(TRACE, 3, "setmcINV");
588 return -EOPNOTSUPP;
589 }
590
591 if (card->info.type == QETH_CARD_TYPE_OSN) {
592 QETH_DBF_TEXT(TRACE, 3, "setmcOSN");
593 return -EOPNOTSUPP;
594 }
595 QETH_DBF_TEXT_(TRACE, 3, "%s", CARD_BUS_ID(card));
596 QETH_DBF_HEX(TRACE, 3, addr->sa_data, OSA_ADDR_LEN);
597 rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
598 if (!rc)
599 rc = qeth_l2_send_setmac(card, addr->sa_data);
600 return rc;
601 }
602
603 static void qeth_l2_set_multicast_list(struct net_device *dev)
604 {
605 struct qeth_card *card = dev->ml_priv;
606 struct dev_addr_list *dm;
607
608 if (card->info.type == QETH_CARD_TYPE_OSN)
609 return ;
610
611 QETH_DBF_TEXT(TRACE, 3, "setmulti");
612 qeth_l2_del_all_mc(card);
613 spin_lock_bh(&card->mclock);
614 for (dm = dev->mc_list; dm; dm = dm->next)
615 qeth_l2_add_mc(card, dm->da_addr, 0);
616
617 for (dm = dev->uc_list; dm; dm = dm->next)
618 qeth_l2_add_mc(card, dm->da_addr, 1);
619
620 spin_unlock_bh(&card->mclock);
621 if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
622 return;
623 qeth_setadp_promisc_mode(card);
624 }
625
626 static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
627 {
628 int rc;
629 struct qeth_hdr *hdr = NULL;
630 int elements = 0;
631 struct qeth_card *card = dev->ml_priv;
632 struct sk_buff *new_skb = skb;
633 int ipv = qeth_get_ip_version(skb);
634 int cast_type = qeth_get_cast_type(card, skb);
635 struct qeth_qdio_out_q *queue = card->qdio.out_qs
636 [qeth_get_priority_queue(card, skb, ipv, cast_type)];
637 int tx_bytes = skb->len;
638 enum qeth_large_send_types large_send = QETH_LARGE_SEND_NO;
639 struct qeth_eddp_context *ctx = NULL;
640 int data_offset = -1;
641 int elements_needed = 0;
642 int hd_len = 0;
643
644 if ((card->state != CARD_STATE_UP) || !card->lan_online) {
645 card->stats.tx_carrier_errors++;
646 goto tx_drop;
647 }
648
649 if ((card->info.type == QETH_CARD_TYPE_OSN) &&
650 (skb->protocol == htons(ETH_P_IPV6)))
651 goto tx_drop;
652
653 if (card->options.performance_stats) {
654 card->perf_stats.outbound_cnt++;
655 card->perf_stats.outbound_start_time = qeth_get_micros();
656 }
657 netif_stop_queue(dev);
658
659 if (skb_is_gso(skb))
660 large_send = QETH_LARGE_SEND_EDDP;
661
662 if (card->info.type == QETH_CARD_TYPE_OSN)
663 hdr = (struct qeth_hdr *)skb->data;
664 else {
665 if ((card->info.type == QETH_CARD_TYPE_IQD) && (!large_send) &&
666 (skb_shinfo(skb)->nr_frags == 0)) {
667 new_skb = skb;
668 data_offset = ETH_HLEN;
669 hd_len = ETH_HLEN;
670 hdr = kmem_cache_alloc(qeth_core_header_cache,
671 GFP_ATOMIC);
672 if (!hdr)
673 goto tx_drop;
674 elements_needed++;
675 skb_reset_mac_header(new_skb);
676 qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
677 hdr->hdr.l2.pkt_length = new_skb->len;
678 memcpy(((char *)hdr) + sizeof(struct qeth_hdr),
679 skb_mac_header(new_skb), ETH_HLEN);
680 } else {
681 /* create a clone with writeable headroom */
682 new_skb = skb_realloc_headroom(skb,
683 sizeof(struct qeth_hdr));
684 if (!new_skb)
685 goto tx_drop;
686 hdr = (struct qeth_hdr *)skb_push(new_skb,
687 sizeof(struct qeth_hdr));
688 skb_set_mac_header(new_skb, sizeof(struct qeth_hdr));
689 qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
690 }
691 }
692
693 if (large_send == QETH_LARGE_SEND_EDDP) {
694 ctx = qeth_eddp_create_context(card, new_skb, hdr,
695 skb->sk->sk_protocol);
696 if (ctx == NULL) {
697 QETH_DBF_MESSAGE(2, "could not create eddp context\n");
698 goto tx_drop;
699 }
700 } else {
701 elements = qeth_get_elements_no(card, (void *)hdr, new_skb,
702 elements_needed);
703 if (!elements) {
704 if (data_offset >= 0)
705 kmem_cache_free(qeth_core_header_cache, hdr);
706 goto tx_drop;
707 }
708 }
709
710 if ((large_send == QETH_LARGE_SEND_NO) &&
711 (skb->ip_summed == CHECKSUM_PARTIAL))
712 qeth_tx_csum(new_skb);
713
714 if (card->info.type != QETH_CARD_TYPE_IQD)
715 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
716 elements, ctx);
717 else
718 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
719 elements, ctx, data_offset, hd_len);
720 if (!rc) {
721 card->stats.tx_packets++;
722 card->stats.tx_bytes += tx_bytes;
723 if (new_skb != skb)
724 dev_kfree_skb_any(skb);
725 if (card->options.performance_stats) {
726 if (large_send != QETH_LARGE_SEND_NO) {
727 card->perf_stats.large_send_bytes += tx_bytes;
728 card->perf_stats.large_send_cnt++;
729 }
730 if (skb_shinfo(new_skb)->nr_frags > 0) {
731 card->perf_stats.sg_skbs_sent++;
732 /* nr_frags + skb->data */
733 card->perf_stats.sg_frags_sent +=
734 skb_shinfo(new_skb)->nr_frags + 1;
735 }
736 }
737
738 if (ctx != NULL) {
739 qeth_eddp_put_context(ctx);
740 dev_kfree_skb_any(new_skb);
741 }
742 } else {
743 if (ctx != NULL)
744 qeth_eddp_put_context(ctx);
745
746 if (data_offset >= 0)
747 kmem_cache_free(qeth_core_header_cache, hdr);
748
749 if (rc == -EBUSY) {
750 if (new_skb != skb)
751 dev_kfree_skb_any(new_skb);
752 return NETDEV_TX_BUSY;
753 } else
754 goto tx_drop;
755 }
756
757 netif_wake_queue(dev);
758 if (card->options.performance_stats)
759 card->perf_stats.outbound_time += qeth_get_micros() -
760 card->perf_stats.outbound_start_time;
761 return rc;
762
763 tx_drop:
764 card->stats.tx_dropped++;
765 card->stats.tx_errors++;
766 if ((new_skb != skb) && new_skb)
767 dev_kfree_skb_any(new_skb);
768 dev_kfree_skb_any(skb);
769 netif_wake_queue(dev);
770 return NETDEV_TX_OK;
771 }
772
773 static void qeth_l2_qdio_input_handler(struct ccw_device *ccwdev,
774 unsigned int qdio_err, unsigned int queue,
775 int first_element, int count, unsigned long card_ptr)
776 {
777 struct net_device *net_dev;
778 struct qeth_card *card;
779 struct qeth_qdio_buffer *buffer;
780 int index;
781 int i;
782
783 card = (struct qeth_card *) card_ptr;
784 net_dev = card->dev;
785 if (card->options.performance_stats) {
786 card->perf_stats.inbound_cnt++;
787 card->perf_stats.inbound_start_time = qeth_get_micros();
788 }
789 if (qdio_err & QDIO_ERROR_ACTIVATE_CHECK_CONDITION) {
790 QETH_DBF_TEXT(TRACE, 1, "qdinchk");
791 QETH_DBF_TEXT_(TRACE, 1, "%s", CARD_BUS_ID(card));
792 QETH_DBF_TEXT_(TRACE, 1, "%04X%04X", first_element,
793 count);
794 QETH_DBF_TEXT_(TRACE, 1, "%04X", queue);
795 qeth_schedule_recovery(card);
796 return;
797 }
798 for (i = first_element; i < (first_element + count); ++i) {
799 index = i % QDIO_MAX_BUFFERS_PER_Q;
800 buffer = &card->qdio.in_q->bufs[index];
801 if (!(qdio_err &&
802 qeth_check_qdio_errors(buffer->buffer, qdio_err, "qinerr")))
803 qeth_l2_process_inbound_buffer(card, buffer, index);
804 /* clear buffer and give back to hardware */
805 qeth_put_buffer_pool_entry(card, buffer->pool_entry);
806 qeth_queue_input_buffer(card, index);
807 }
808 if (card->options.performance_stats)
809 card->perf_stats.inbound_time += qeth_get_micros() -
810 card->perf_stats.inbound_start_time;
811 }
812
813 static int qeth_l2_open(struct net_device *dev)
814 {
815 struct qeth_card *card = dev->ml_priv;
816
817 QETH_DBF_TEXT(TRACE, 4, "qethopen");
818 if (card->state != CARD_STATE_SOFTSETUP)
819 return -ENODEV;
820
821 if ((card->info.type != QETH_CARD_TYPE_OSN) &&
822 (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
823 QETH_DBF_TEXT(TRACE, 4, "nomacadr");
824 return -EPERM;
825 }
826 card->data.state = CH_STATE_UP;
827 card->state = CARD_STATE_UP;
828 netif_start_queue(dev);
829
830 if (!card->lan_online && netif_carrier_ok(dev))
831 netif_carrier_off(dev);
832 return 0;
833 }
834
835
836 static int qeth_l2_stop(struct net_device *dev)
837 {
838 struct qeth_card *card = dev->ml_priv;
839
840 QETH_DBF_TEXT(TRACE, 4, "qethstop");
841 netif_tx_disable(dev);
842 if (card->state == CARD_STATE_UP)
843 card->state = CARD_STATE_SOFTSETUP;
844 return 0;
845 }
846
847 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
848 {
849 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
850
851 INIT_LIST_HEAD(&card->vid_list);
852 INIT_LIST_HEAD(&card->mc_list);
853 card->options.layer2 = 1;
854 card->discipline.input_handler = (qdio_handler_t *)
855 qeth_l2_qdio_input_handler;
856 card->discipline.output_handler = (qdio_handler_t *)
857 qeth_qdio_output_handler;
858 card->discipline.recover = qeth_l2_recover;
859 return 0;
860 }
861
862 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
863 {
864 struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
865
866 wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
867
868 if (cgdev->state == CCWGROUP_ONLINE) {
869 card->use_hard_stop = 1;
870 qeth_l2_set_offline(cgdev);
871 }
872
873 if (card->dev) {
874 unregister_netdev(card->dev);
875 card->dev = NULL;
876 }
877
878 qeth_l2_del_all_mc(card);
879 return;
880 }
881
882 static int qeth_l2_ethtool_set_tso(struct net_device *dev, u32 data)
883 {
884 struct qeth_card *card = dev->ml_priv;
885
886 if (data) {
887 if (card->options.large_send == QETH_LARGE_SEND_NO) {
888 card->options.large_send = QETH_LARGE_SEND_EDDP;
889 dev->features |= NETIF_F_TSO;
890 }
891 } else {
892 dev->features &= ~NETIF_F_TSO;
893 card->options.large_send = QETH_LARGE_SEND_NO;
894 }
895 return 0;
896 }
897
898 static struct ethtool_ops qeth_l2_ethtool_ops = {
899 .get_link = ethtool_op_get_link,
900 .get_tx_csum = ethtool_op_get_tx_csum,
901 .set_tx_csum = ethtool_op_set_tx_hw_csum,
902 .get_sg = ethtool_op_get_sg,
903 .set_sg = ethtool_op_set_sg,
904 .get_tso = ethtool_op_get_tso,
905 .set_tso = qeth_l2_ethtool_set_tso,
906 .get_strings = qeth_core_get_strings,
907 .get_ethtool_stats = qeth_core_get_ethtool_stats,
908 .get_stats_count = qeth_core_get_stats_count,
909 .get_drvinfo = qeth_core_get_drvinfo,
910 .get_settings = qeth_core_ethtool_get_settings,
911 };
912
913 static struct ethtool_ops qeth_l2_osn_ops = {
914 .get_strings = qeth_core_get_strings,
915 .get_ethtool_stats = qeth_core_get_ethtool_stats,
916 .get_stats_count = qeth_core_get_stats_count,
917 .get_drvinfo = qeth_core_get_drvinfo,
918 };
919
920 static int qeth_l2_setup_netdev(struct qeth_card *card)
921 {
922 switch (card->info.type) {
923 case QETH_CARD_TYPE_OSAE:
924 card->dev = alloc_etherdev(0);
925 break;
926 case QETH_CARD_TYPE_IQD:
927 card->dev = alloc_netdev(0, "hsi%d", ether_setup);
928 break;
929 case QETH_CARD_TYPE_OSN:
930 card->dev = alloc_netdev(0, "osn%d", ether_setup);
931 card->dev->flags |= IFF_NOARP;
932 break;
933 default:
934 card->dev = alloc_etherdev(0);
935 }
936
937 if (!card->dev)
938 return -ENODEV;
939
940 card->dev->ml_priv = card;
941 card->dev->tx_timeout = &qeth_tx_timeout;
942 card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
943 card->dev->open = qeth_l2_open;
944 card->dev->stop = qeth_l2_stop;
945 card->dev->hard_start_xmit = qeth_l2_hard_start_xmit;
946 card->dev->do_ioctl = qeth_l2_do_ioctl;
947 card->dev->get_stats = qeth_get_stats;
948 card->dev->change_mtu = qeth_change_mtu;
949 card->dev->set_multicast_list = qeth_l2_set_multicast_list;
950 card->dev->vlan_rx_kill_vid = qeth_l2_vlan_rx_kill_vid;
951 card->dev->vlan_rx_add_vid = qeth_l2_vlan_rx_add_vid;
952 card->dev->set_mac_address = qeth_l2_set_mac_address;
953 card->dev->mtu = card->info.initial_mtu;
954 if (card->info.type != QETH_CARD_TYPE_OSN)
955 SET_ETHTOOL_OPS(card->dev, &qeth_l2_ethtool_ops);
956 else
957 SET_ETHTOOL_OPS(card->dev, &qeth_l2_osn_ops);
958 card->dev->features |= NETIF_F_HW_VLAN_FILTER;
959 card->info.broadcast_capable = 1;
960 qeth_l2_request_initial_mac(card);
961 SET_NETDEV_DEV(card->dev, &card->gdev->dev);
962 return register_netdev(card->dev);
963 }
964
965 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
966 {
967 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
968 int rc = 0;
969 enum qeth_card_states recover_flag;
970
971 BUG_ON(!card);
972 QETH_DBF_TEXT(SETUP, 2, "setonlin");
973 QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
974
975 qeth_set_allowed_threads(card, QETH_RECOVER_THREAD, 1);
976 recover_flag = card->state;
977 rc = ccw_device_set_online(CARD_RDEV(card));
978 if (rc) {
979 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
980 return -EIO;
981 }
982 rc = ccw_device_set_online(CARD_WDEV(card));
983 if (rc) {
984 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
985 return -EIO;
986 }
987 rc = ccw_device_set_online(CARD_DDEV(card));
988 if (rc) {
989 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
990 return -EIO;
991 }
992
993 rc = qeth_core_hardsetup_card(card);
994 if (rc) {
995 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
996 goto out_remove;
997 }
998
999 if (!card->dev && qeth_l2_setup_netdev(card))
1000 goto out_remove;
1001
1002 if (card->info.type != QETH_CARD_TYPE_OSN)
1003 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
1004
1005 card->state = CARD_STATE_HARDSETUP;
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 PRINT_WARN("LAN on card %s if offline! "
1016 "Waiting for STARTLAN from card.\n",
1017 CARD_BUS_ID(card));
1018 card->lan_online = 0;
1019 }
1020 return rc;
1021 } else
1022 card->lan_online = 1;
1023
1024 if (card->info.type != QETH_CARD_TYPE_OSN) {
1025 qeth_set_large_send(card, card->options.large_send);
1026 qeth_l2_process_vlans(card, 0);
1027 }
1028
1029 netif_tx_disable(card->dev);
1030
1031 rc = qeth_init_qdio_queues(card);
1032 if (rc) {
1033 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1034 goto out_remove;
1035 }
1036 card->state = CARD_STATE_SOFTSETUP;
1037 netif_carrier_on(card->dev);
1038
1039 qeth_set_allowed_threads(card, 0xffffffff, 0);
1040 if (recover_flag == CARD_STATE_RECOVER) {
1041 if (recovery_mode &&
1042 card->info.type != QETH_CARD_TYPE_OSN) {
1043 qeth_l2_open(card->dev);
1044 } else {
1045 rtnl_lock();
1046 dev_open(card->dev);
1047 rtnl_unlock();
1048 }
1049 /* this also sets saved unicast addresses */
1050 qeth_l2_set_multicast_list(card->dev);
1051 }
1052 /* let user_space know that device is online */
1053 kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1054 return 0;
1055 out_remove:
1056 card->use_hard_stop = 1;
1057 qeth_l2_stop_card(card, 0);
1058 ccw_device_set_offline(CARD_DDEV(card));
1059 ccw_device_set_offline(CARD_WDEV(card));
1060 ccw_device_set_offline(CARD_RDEV(card));
1061 if (recover_flag == CARD_STATE_RECOVER)
1062 card->state = CARD_STATE_RECOVER;
1063 else
1064 card->state = CARD_STATE_DOWN;
1065 return -ENODEV;
1066 }
1067
1068 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1069 {
1070 return __qeth_l2_set_online(gdev, 0);
1071 }
1072
1073 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1074 int recovery_mode)
1075 {
1076 struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1077 int rc = 0, rc2 = 0, rc3 = 0;
1078 enum qeth_card_states recover_flag;
1079
1080 QETH_DBF_TEXT(SETUP, 3, "setoffl");
1081 QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1082
1083 if (card->dev && netif_carrier_ok(card->dev))
1084 netif_carrier_off(card->dev);
1085 recover_flag = card->state;
1086 qeth_l2_stop_card(card, recovery_mode);
1087 rc = ccw_device_set_offline(CARD_DDEV(card));
1088 rc2 = ccw_device_set_offline(CARD_WDEV(card));
1089 rc3 = ccw_device_set_offline(CARD_RDEV(card));
1090 if (!rc)
1091 rc = (rc2) ? rc2 : rc3;
1092 if (rc)
1093 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1094 if (recover_flag == CARD_STATE_UP)
1095 card->state = CARD_STATE_RECOVER;
1096 /* let user_space know that device is offline */
1097 kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1098 return 0;
1099 }
1100
1101 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1102 {
1103 return __qeth_l2_set_offline(cgdev, 0);
1104 }
1105
1106 static int qeth_l2_recover(void *ptr)
1107 {
1108 struct qeth_card *card;
1109 int rc = 0;
1110
1111 card = (struct qeth_card *) ptr;
1112 QETH_DBF_TEXT(TRACE, 2, "recover1");
1113 QETH_DBF_HEX(TRACE, 2, &card, sizeof(void *));
1114 if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1115 return 0;
1116 QETH_DBF_TEXT(TRACE, 2, "recover2");
1117 PRINT_WARN("Recovery of device %s started ...\n",
1118 CARD_BUS_ID(card));
1119 card->use_hard_stop = 1;
1120 __qeth_l2_set_offline(card->gdev, 1);
1121 rc = __qeth_l2_set_online(card->gdev, 1);
1122 /* don't run another scheduled recovery */
1123 qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1124 qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1125 if (!rc)
1126 PRINT_INFO("Device %s successfully recovered!\n",
1127 CARD_BUS_ID(card));
1128 else {
1129 rtnl_lock();
1130 dev_close(card->dev);
1131 rtnl_unlock();
1132 PRINT_INFO("Device %s could not be recovered!\n",
1133 CARD_BUS_ID(card));
1134 }
1135 return 0;
1136 }
1137
1138 static int __init qeth_l2_init(void)
1139 {
1140 PRINT_INFO("register layer 2 discipline\n");
1141 return 0;
1142 }
1143
1144 static void __exit qeth_l2_exit(void)
1145 {
1146 PRINT_INFO("unregister layer 2 discipline\n");
1147 }
1148
1149 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1150 {
1151 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1152 qeth_qdio_clear_card(card, 0);
1153 qeth_clear_qdio_buffers(card);
1154 }
1155
1156 struct ccwgroup_driver qeth_l2_ccwgroup_driver = {
1157 .probe = qeth_l2_probe_device,
1158 .remove = qeth_l2_remove_device,
1159 .set_online = qeth_l2_set_online,
1160 .set_offline = qeth_l2_set_offline,
1161 .shutdown = qeth_l2_shutdown,
1162 };
1163 EXPORT_SYMBOL_GPL(qeth_l2_ccwgroup_driver);
1164
1165 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1166 struct qeth_cmd_buffer *iob)
1167 {
1168 unsigned long flags;
1169 int rc = 0;
1170
1171 QETH_DBF_TEXT(TRACE, 5, "osndctrd");
1172
1173 wait_event(card->wait_q,
1174 atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1175 qeth_prepare_control_data(card, len, iob);
1176 QETH_DBF_TEXT(TRACE, 6, "osnoirqp");
1177 spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1178 rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1179 (addr_t) iob, 0, 0);
1180 spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1181 if (rc) {
1182 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1183 "ccw_device_start rc = %i\n", rc);
1184 QETH_DBF_TEXT_(TRACE, 2, " err%d", rc);
1185 qeth_release_buffer(iob->channel, iob);
1186 atomic_set(&card->write.irq_pending, 0);
1187 wake_up(&card->wait_q);
1188 }
1189 return rc;
1190 }
1191
1192 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1193 struct qeth_cmd_buffer *iob, int data_len)
1194 {
1195 u16 s1, s2;
1196
1197 QETH_DBF_TEXT(TRACE, 4, "osndipa");
1198
1199 qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1200 s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1201 s2 = (u16)data_len;
1202 memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1203 memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1204 memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1205 memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1206 return qeth_osn_send_control_data(card, s1, iob);
1207 }
1208
1209 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1210 {
1211 struct qeth_cmd_buffer *iob;
1212 struct qeth_card *card;
1213 int rc;
1214
1215 QETH_DBF_TEXT(TRACE, 2, "osnsdmc");
1216 if (!dev)
1217 return -ENODEV;
1218 card = dev->ml_priv;
1219 if (!card)
1220 return -ENODEV;
1221 if ((card->state != CARD_STATE_UP) &&
1222 (card->state != CARD_STATE_SOFTSETUP))
1223 return -ENODEV;
1224 iob = qeth_wait_for_buffer(&card->write);
1225 memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1226 rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1227 return rc;
1228 }
1229 EXPORT_SYMBOL(qeth_osn_assist);
1230
1231 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1232 int (*assist_cb)(struct net_device *, void *),
1233 int (*data_cb)(struct sk_buff *))
1234 {
1235 struct qeth_card *card;
1236
1237 QETH_DBF_TEXT(TRACE, 2, "osnreg");
1238 *dev = qeth_l2_netdev_by_devno(read_dev_no);
1239 if (*dev == NULL)
1240 return -ENODEV;
1241 card = (*dev)->ml_priv;
1242 if (!card)
1243 return -ENODEV;
1244 if ((assist_cb == NULL) || (data_cb == NULL))
1245 return -EINVAL;
1246 card->osn_info.assist_cb = assist_cb;
1247 card->osn_info.data_cb = data_cb;
1248 return 0;
1249 }
1250 EXPORT_SYMBOL(qeth_osn_register);
1251
1252 void qeth_osn_deregister(struct net_device *dev)
1253 {
1254 struct qeth_card *card;
1255
1256 QETH_DBF_TEXT(TRACE, 2, "osndereg");
1257 if (!dev)
1258 return;
1259 card = dev->ml_priv;
1260 if (!card)
1261 return;
1262 card->osn_info.assist_cb = NULL;
1263 card->osn_info.data_cb = NULL;
1264 return;
1265 }
1266 EXPORT_SYMBOL(qeth_osn_deregister);
1267
1268 module_init(qeth_l2_init);
1269 module_exit(qeth_l2_exit);
1270 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1271 MODULE_DESCRIPTION("qeth layer 2 discipline");
1272 MODULE_LICENSE("GPL");
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