xref: /openbmc/linux/drivers/s390/net/qeth_l2_main.c (revision 9ac8d3fb)
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 			if (card->info.type == QETH_CARD_TYPE_OSN) {
453 				skb_push(skb, sizeof(struct qeth_hdr));
454 				skb_copy_to_linear_data(skb, hdr,
455 						sizeof(struct qeth_hdr));
456 				len = skb->len;
457 				card->osn_info.data_cb(skb);
458 				break;
459 			}
460 			/* else unknown */
461 		default:
462 			dev_kfree_skb_any(skb);
463 			QETH_DBF_TEXT(TRACE, 3, "inbunkno");
464 			QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
465 			continue;
466 		}
467 		card->dev->last_rx = jiffies;
468 		card->stats.rx_packets++;
469 		card->stats.rx_bytes += len;
470 	}
471 }
472 
473 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
474 			   enum qeth_ipa_cmds ipacmd,
475 			   int (*reply_cb) (struct qeth_card *,
476 					    struct qeth_reply*,
477 					    unsigned long))
478 {
479 	struct qeth_ipa_cmd *cmd;
480 	struct qeth_cmd_buffer *iob;
481 
482 	QETH_DBF_TEXT(TRACE, 2, "L2sdmac");
483 	iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
484 	cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
485 	cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
486 	memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
487 	return qeth_send_ipa_cmd(card, iob, reply_cb, NULL);
488 }
489 
490 static int qeth_l2_send_setmac_cb(struct qeth_card *card,
491 			   struct qeth_reply *reply,
492 			   unsigned long data)
493 {
494 	struct qeth_ipa_cmd *cmd;
495 
496 	QETH_DBF_TEXT(TRACE, 2, "L2Smaccb");
497 	cmd = (struct qeth_ipa_cmd *) data;
498 	if (cmd->hdr.return_code) {
499 		QETH_DBF_TEXT_(TRACE, 2, "L2er%x", cmd->hdr.return_code);
500 		card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
501 		cmd->hdr.return_code = -EIO;
502 	} else {
503 		card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
504 		memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac,
505 		       OSA_ADDR_LEN);
506 		PRINT_INFO("MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x "
507 			   "successfully registered on device %s\n",
508 			   card->dev->dev_addr[0], card->dev->dev_addr[1],
509 			   card->dev->dev_addr[2], card->dev->dev_addr[3],
510 			   card->dev->dev_addr[4], card->dev->dev_addr[5],
511 			   card->dev->name);
512 	}
513 	return 0;
514 }
515 
516 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
517 {
518 	QETH_DBF_TEXT(TRACE, 2, "L2Setmac");
519 	return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
520 					  qeth_l2_send_setmac_cb);
521 }
522 
523 static int qeth_l2_send_delmac_cb(struct qeth_card *card,
524 			   struct qeth_reply *reply,
525 			   unsigned long data)
526 {
527 	struct qeth_ipa_cmd *cmd;
528 
529 	QETH_DBF_TEXT(TRACE, 2, "L2Dmaccb");
530 	cmd = (struct qeth_ipa_cmd *) data;
531 	if (cmd->hdr.return_code) {
532 		QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
533 		cmd->hdr.return_code = -EIO;
534 		return 0;
535 	}
536 	card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
537 
538 	return 0;
539 }
540 
541 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
542 {
543 	QETH_DBF_TEXT(TRACE, 2, "L2Delmac");
544 	if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
545 		return 0;
546 	return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC,
547 					  qeth_l2_send_delmac_cb);
548 }
549 
550 static int qeth_l2_request_initial_mac(struct qeth_card *card)
551 {
552 	int rc = 0;
553 	char vendor_pre[] = {0x02, 0x00, 0x00};
554 
555 	QETH_DBF_TEXT(SETUP, 2, "doL2init");
556 	QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
557 
558 	rc = qeth_query_setadapterparms(card);
559 	if (rc) {
560 		QETH_DBF_MESSAGE(2, "could not query adapter parameters on "
561 			"device %s: x%x\n", CARD_BUS_ID(card), rc);
562 	}
563 
564 	if ((card->info.type == QETH_CARD_TYPE_IQD) ||
565 	    (card->info.guestlan)) {
566 		rc = qeth_setadpparms_change_macaddr(card);
567 		if (rc) {
568 			QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
569 				"device %s: x%x\n", CARD_BUS_ID(card), rc);
570 			QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
571 			return rc;
572 		}
573 		QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN);
574 	} else {
575 		random_ether_addr(card->dev->dev_addr);
576 		memcpy(card->dev->dev_addr, vendor_pre, 3);
577 	}
578 	return 0;
579 }
580 
581 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
582 {
583 	struct sockaddr *addr = p;
584 	struct qeth_card *card = dev->ml_priv;
585 	int rc = 0;
586 
587 	QETH_DBF_TEXT(TRACE, 3, "setmac");
588 
589 	if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
590 		QETH_DBF_TEXT(TRACE, 3, "setmcINV");
591 		return -EOPNOTSUPP;
592 	}
593 
594 	if (card->info.type == QETH_CARD_TYPE_OSN) {
595 		QETH_DBF_TEXT(TRACE, 3, "setmcOSN");
596 		return -EOPNOTSUPP;
597 	}
598 	QETH_DBF_TEXT_(TRACE, 3, "%s", CARD_BUS_ID(card));
599 	QETH_DBF_HEX(TRACE, 3, addr->sa_data, OSA_ADDR_LEN);
600 	rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
601 	if (!rc)
602 		rc = qeth_l2_send_setmac(card, addr->sa_data);
603 	return rc;
604 }
605 
606 static void qeth_l2_set_multicast_list(struct net_device *dev)
607 {
608 	struct qeth_card *card = dev->ml_priv;
609 	struct dev_addr_list *dm;
610 
611 	if (card->info.type == QETH_CARD_TYPE_OSN)
612 		return ;
613 
614 	QETH_DBF_TEXT(TRACE, 3, "setmulti");
615 	qeth_l2_del_all_mc(card);
616 	spin_lock_bh(&card->mclock);
617 	for (dm = dev->mc_list; dm; dm = dm->next)
618 		qeth_l2_add_mc(card, dm->da_addr, 0);
619 
620 	for (dm = dev->uc_list; dm; dm = dm->next)
621 		qeth_l2_add_mc(card, dm->da_addr, 1);
622 
623 	spin_unlock_bh(&card->mclock);
624 	if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
625 		return;
626 	qeth_setadp_promisc_mode(card);
627 }
628 
629 static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
630 {
631 	int rc;
632 	struct qeth_hdr *hdr = NULL;
633 	int elements = 0;
634 	struct qeth_card *card = dev->ml_priv;
635 	struct sk_buff *new_skb = skb;
636 	int ipv = qeth_get_ip_version(skb);
637 	int cast_type = qeth_get_cast_type(card, skb);
638 	struct qeth_qdio_out_q *queue = card->qdio.out_qs
639 		[qeth_get_priority_queue(card, skb, ipv, cast_type)];
640 	int tx_bytes = skb->len;
641 	enum qeth_large_send_types large_send = QETH_LARGE_SEND_NO;
642 	struct qeth_eddp_context *ctx = NULL;
643 	int data_offset = -1;
644 	int elements_needed = 0;
645 	int hd_len = 0;
646 
647 	if ((card->state != CARD_STATE_UP) || !card->lan_online) {
648 		card->stats.tx_carrier_errors++;
649 		goto tx_drop;
650 	}
651 
652 	if ((card->info.type == QETH_CARD_TYPE_OSN) &&
653 	    (skb->protocol == htons(ETH_P_IPV6)))
654 		goto tx_drop;
655 
656 	if (card->options.performance_stats) {
657 		card->perf_stats.outbound_cnt++;
658 		card->perf_stats.outbound_start_time = qeth_get_micros();
659 	}
660 	netif_stop_queue(dev);
661 
662 	if (skb_is_gso(skb))
663 		large_send = QETH_LARGE_SEND_EDDP;
664 
665 	if (card->info.type == QETH_CARD_TYPE_OSN)
666 		hdr = (struct qeth_hdr *)skb->data;
667 	else {
668 		if ((card->info.type == QETH_CARD_TYPE_IQD) && (!large_send) &&
669 		    (skb_shinfo(skb)->nr_frags == 0)) {
670 			new_skb = skb;
671 			data_offset = ETH_HLEN;
672 			hd_len = ETH_HLEN;
673 			hdr = kmem_cache_alloc(qeth_core_header_cache,
674 						GFP_ATOMIC);
675 			if (!hdr)
676 				goto tx_drop;
677 			elements_needed++;
678 			skb_reset_mac_header(new_skb);
679 			qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
680 			hdr->hdr.l2.pkt_length = new_skb->len;
681 			memcpy(((char *)hdr) + sizeof(struct qeth_hdr),
682 				skb_mac_header(new_skb), ETH_HLEN);
683 		} else {
684 			/* create a clone with writeable headroom */
685 			new_skb = skb_realloc_headroom(skb,
686 						sizeof(struct qeth_hdr));
687 			if (!new_skb)
688 				goto tx_drop;
689 			hdr = (struct qeth_hdr *)skb_push(new_skb,
690 						sizeof(struct qeth_hdr));
691 			skb_set_mac_header(new_skb, sizeof(struct qeth_hdr));
692 			qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
693 		}
694 	}
695 
696 	if (large_send == QETH_LARGE_SEND_EDDP) {
697 		ctx = qeth_eddp_create_context(card, new_skb, hdr,
698 						skb->sk->sk_protocol);
699 		if (ctx == NULL) {
700 			QETH_DBF_MESSAGE(2, "could not create eddp context\n");
701 			goto tx_drop;
702 		}
703 	} else {
704 		elements = qeth_get_elements_no(card, (void *)hdr, new_skb,
705 						elements_needed);
706 		if (!elements) {
707 			if (data_offset >= 0)
708 				kmem_cache_free(qeth_core_header_cache, hdr);
709 			goto tx_drop;
710 		}
711 	}
712 
713 	if ((large_send == QETH_LARGE_SEND_NO) &&
714 	    (skb->ip_summed == CHECKSUM_PARTIAL))
715 		qeth_tx_csum(new_skb);
716 
717 	if (card->info.type != QETH_CARD_TYPE_IQD)
718 		rc = qeth_do_send_packet(card, queue, new_skb, hdr,
719 					 elements, ctx);
720 	else
721 		rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
722 					elements, ctx, data_offset, hd_len);
723 	if (!rc) {
724 		card->stats.tx_packets++;
725 		card->stats.tx_bytes += tx_bytes;
726 		if (new_skb != skb)
727 			dev_kfree_skb_any(skb);
728 		if (card->options.performance_stats) {
729 			if (large_send != QETH_LARGE_SEND_NO) {
730 				card->perf_stats.large_send_bytes += tx_bytes;
731 				card->perf_stats.large_send_cnt++;
732 			}
733 			if (skb_shinfo(new_skb)->nr_frags > 0) {
734 				card->perf_stats.sg_skbs_sent++;
735 				/* nr_frags + skb->data */
736 				card->perf_stats.sg_frags_sent +=
737 					skb_shinfo(new_skb)->nr_frags + 1;
738 			}
739 		}
740 
741 		if (ctx != NULL) {
742 			qeth_eddp_put_context(ctx);
743 			dev_kfree_skb_any(new_skb);
744 		}
745 	} else {
746 		if (ctx != NULL)
747 			qeth_eddp_put_context(ctx);
748 
749 		if (data_offset >= 0)
750 			kmem_cache_free(qeth_core_header_cache, hdr);
751 
752 		if (rc == -EBUSY) {
753 			if (new_skb != skb)
754 				dev_kfree_skb_any(new_skb);
755 			return NETDEV_TX_BUSY;
756 		} else
757 			goto tx_drop;
758 	}
759 
760 	netif_wake_queue(dev);
761 	if (card->options.performance_stats)
762 		card->perf_stats.outbound_time += qeth_get_micros() -
763 			card->perf_stats.outbound_start_time;
764 	return rc;
765 
766 tx_drop:
767 	card->stats.tx_dropped++;
768 	card->stats.tx_errors++;
769 	if ((new_skb != skb) && new_skb)
770 		dev_kfree_skb_any(new_skb);
771 	dev_kfree_skb_any(skb);
772 	netif_wake_queue(dev);
773 	return NETDEV_TX_OK;
774 }
775 
776 static void qeth_l2_qdio_input_handler(struct ccw_device *ccwdev,
777 			unsigned int qdio_err, unsigned int queue,
778 			int first_element, int count, unsigned long card_ptr)
779 {
780 	struct net_device *net_dev;
781 	struct qeth_card *card;
782 	struct qeth_qdio_buffer *buffer;
783 	int index;
784 	int i;
785 
786 	card = (struct qeth_card *) card_ptr;
787 	net_dev = card->dev;
788 	if (card->options.performance_stats) {
789 		card->perf_stats.inbound_cnt++;
790 		card->perf_stats.inbound_start_time = qeth_get_micros();
791 	}
792 	if (qdio_err & QDIO_ERROR_ACTIVATE_CHECK_CONDITION) {
793 		QETH_DBF_TEXT(TRACE, 1, "qdinchk");
794 		QETH_DBF_TEXT_(TRACE, 1, "%s", CARD_BUS_ID(card));
795 		QETH_DBF_TEXT_(TRACE, 1, "%04X%04X", first_element,
796 				count);
797 		QETH_DBF_TEXT_(TRACE, 1, "%04X", queue);
798 		qeth_schedule_recovery(card);
799 		return;
800 	}
801 	for (i = first_element; i < (first_element + count); ++i) {
802 		index = i % QDIO_MAX_BUFFERS_PER_Q;
803 		buffer = &card->qdio.in_q->bufs[index];
804 		if (!(qdio_err &&
805 		      qeth_check_qdio_errors(buffer->buffer, qdio_err, "qinerr")))
806 			qeth_l2_process_inbound_buffer(card, buffer, index);
807 		/* clear buffer and give back to hardware */
808 		qeth_put_buffer_pool_entry(card, buffer->pool_entry);
809 		qeth_queue_input_buffer(card, index);
810 	}
811 	if (card->options.performance_stats)
812 		card->perf_stats.inbound_time += qeth_get_micros() -
813 			card->perf_stats.inbound_start_time;
814 }
815 
816 static int qeth_l2_open(struct net_device *dev)
817 {
818 	struct qeth_card *card = dev->ml_priv;
819 
820 	QETH_DBF_TEXT(TRACE, 4, "qethopen");
821 	if (card->state != CARD_STATE_SOFTSETUP)
822 		return -ENODEV;
823 
824 	if ((card->info.type != QETH_CARD_TYPE_OSN) &&
825 	     (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
826 		QETH_DBF_TEXT(TRACE, 4, "nomacadr");
827 		return -EPERM;
828 	}
829 	card->data.state = CH_STATE_UP;
830 	card->state = CARD_STATE_UP;
831 	netif_start_queue(dev);
832 
833 	if (!card->lan_online && netif_carrier_ok(dev))
834 		netif_carrier_off(dev);
835 	return 0;
836 }
837 
838 
839 static int qeth_l2_stop(struct net_device *dev)
840 {
841 	struct qeth_card *card = dev->ml_priv;
842 
843 	QETH_DBF_TEXT(TRACE, 4, "qethstop");
844 	netif_tx_disable(dev);
845 	if (card->state == CARD_STATE_UP)
846 		card->state = CARD_STATE_SOFTSETUP;
847 	return 0;
848 }
849 
850 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
851 {
852 	struct qeth_card *card = dev_get_drvdata(&gdev->dev);
853 
854 	INIT_LIST_HEAD(&card->vid_list);
855 	INIT_LIST_HEAD(&card->mc_list);
856 	card->options.layer2 = 1;
857 	card->discipline.input_handler = (qdio_handler_t *)
858 		qeth_l2_qdio_input_handler;
859 	card->discipline.output_handler = (qdio_handler_t *)
860 		qeth_qdio_output_handler;
861 	card->discipline.recover = qeth_l2_recover;
862 	return 0;
863 }
864 
865 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
866 {
867 	struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
868 
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 int qeth_l2_ethtool_set_tso(struct net_device *dev, u32 data)
886 {
887 	struct qeth_card *card = dev->ml_priv;
888 
889 	if (data) {
890 		if (card->options.large_send == QETH_LARGE_SEND_NO) {
891 			card->options.large_send = QETH_LARGE_SEND_EDDP;
892 			dev->features |= NETIF_F_TSO;
893 		}
894 	} else {
895 		dev->features &= ~NETIF_F_TSO;
896 		card->options.large_send = QETH_LARGE_SEND_NO;
897 	}
898 	return 0;
899 }
900 
901 static struct ethtool_ops qeth_l2_ethtool_ops = {
902 	.get_link = ethtool_op_get_link,
903 	.get_tx_csum = ethtool_op_get_tx_csum,
904 	.set_tx_csum = ethtool_op_set_tx_hw_csum,
905 	.get_sg = ethtool_op_get_sg,
906 	.set_sg = ethtool_op_set_sg,
907 	.get_tso = ethtool_op_get_tso,
908 	.set_tso = qeth_l2_ethtool_set_tso,
909 	.get_strings = qeth_core_get_strings,
910 	.get_ethtool_stats = qeth_core_get_ethtool_stats,
911 	.get_stats_count = qeth_core_get_stats_count,
912 	.get_drvinfo = qeth_core_get_drvinfo,
913 	.get_settings = qeth_core_ethtool_get_settings,
914 };
915 
916 static struct ethtool_ops qeth_l2_osn_ops = {
917 	.get_strings = qeth_core_get_strings,
918 	.get_ethtool_stats = qeth_core_get_ethtool_stats,
919 	.get_stats_count = qeth_core_get_stats_count,
920 	.get_drvinfo = qeth_core_get_drvinfo,
921 };
922 
923 static int qeth_l2_setup_netdev(struct qeth_card *card)
924 {
925 	switch (card->info.type) {
926 	case QETH_CARD_TYPE_OSAE:
927 		card->dev = alloc_etherdev(0);
928 		break;
929 	case QETH_CARD_TYPE_IQD:
930 		card->dev = alloc_netdev(0, "hsi%d", ether_setup);
931 		break;
932 	case QETH_CARD_TYPE_OSN:
933 		card->dev = alloc_netdev(0, "osn%d", ether_setup);
934 		card->dev->flags |= IFF_NOARP;
935 		break;
936 	default:
937 		card->dev = alloc_etherdev(0);
938 	}
939 
940 	if (!card->dev)
941 		return -ENODEV;
942 
943 	card->dev->ml_priv = card;
944 	card->dev->tx_timeout = &qeth_tx_timeout;
945 	card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
946 	card->dev->open = qeth_l2_open;
947 	card->dev->stop = qeth_l2_stop;
948 	card->dev->hard_start_xmit = qeth_l2_hard_start_xmit;
949 	card->dev->do_ioctl = qeth_l2_do_ioctl;
950 	card->dev->get_stats = qeth_get_stats;
951 	card->dev->change_mtu = qeth_change_mtu;
952 	card->dev->set_multicast_list = qeth_l2_set_multicast_list;
953 	card->dev->vlan_rx_kill_vid = qeth_l2_vlan_rx_kill_vid;
954 	card->dev->vlan_rx_add_vid = qeth_l2_vlan_rx_add_vid;
955 	card->dev->set_mac_address = qeth_l2_set_mac_address;
956 	card->dev->mtu = card->info.initial_mtu;
957 	if (card->info.type != QETH_CARD_TYPE_OSN)
958 		SET_ETHTOOL_OPS(card->dev, &qeth_l2_ethtool_ops);
959 	else
960 		SET_ETHTOOL_OPS(card->dev, &qeth_l2_osn_ops);
961 	card->dev->features |= NETIF_F_HW_VLAN_FILTER;
962 	card->info.broadcast_capable = 1;
963 	qeth_l2_request_initial_mac(card);
964 	SET_NETDEV_DEV(card->dev, &card->gdev->dev);
965 	return register_netdev(card->dev);
966 }
967 
968 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
969 {
970 	struct qeth_card *card = dev_get_drvdata(&gdev->dev);
971 	int rc = 0;
972 	enum qeth_card_states recover_flag;
973 
974 	BUG_ON(!card);
975 	QETH_DBF_TEXT(SETUP, 2, "setonlin");
976 	QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
977 
978 	qeth_set_allowed_threads(card, QETH_RECOVER_THREAD, 1);
979 	recover_flag = card->state;
980 	rc = ccw_device_set_online(CARD_RDEV(card));
981 	if (rc) {
982 		QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
983 		return -EIO;
984 	}
985 	rc = ccw_device_set_online(CARD_WDEV(card));
986 	if (rc) {
987 		QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
988 		return -EIO;
989 	}
990 	rc = ccw_device_set_online(CARD_DDEV(card));
991 	if (rc) {
992 		QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
993 		return -EIO;
994 	}
995 
996 	rc = qeth_core_hardsetup_card(card);
997 	if (rc) {
998 		QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
999 		goto out_remove;
1000 	}
1001 
1002 	if (!card->dev && qeth_l2_setup_netdev(card))
1003 		goto out_remove;
1004 
1005 	if (card->info.type != QETH_CARD_TYPE_OSN)
1006 		qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
1007 
1008 	card->state = CARD_STATE_HARDSETUP;
1009 	qeth_print_status_message(card);
1010 
1011 	/* softsetup */
1012 	QETH_DBF_TEXT(SETUP, 2, "softsetp");
1013 
1014 	rc = qeth_send_startlan(card);
1015 	if (rc) {
1016 		QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1017 		if (rc == 0xe080) {
1018 			PRINT_WARN("LAN on card %s if offline! "
1019 				   "Waiting for STARTLAN from card.\n",
1020 				   CARD_BUS_ID(card));
1021 			card->lan_online = 0;
1022 		}
1023 		return rc;
1024 	} else
1025 		card->lan_online = 1;
1026 
1027 	if (card->info.type != QETH_CARD_TYPE_OSN) {
1028 		qeth_set_large_send(card, card->options.large_send);
1029 		qeth_l2_process_vlans(card, 0);
1030 	}
1031 
1032 	netif_tx_disable(card->dev);
1033 
1034 	rc = qeth_init_qdio_queues(card);
1035 	if (rc) {
1036 		QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1037 		goto out_remove;
1038 	}
1039 	card->state = CARD_STATE_SOFTSETUP;
1040 	netif_carrier_on(card->dev);
1041 
1042 	qeth_set_allowed_threads(card, 0xffffffff, 0);
1043 	if (recover_flag == CARD_STATE_RECOVER) {
1044 		if (recovery_mode &&
1045 		    card->info.type != QETH_CARD_TYPE_OSN) {
1046 			qeth_l2_open(card->dev);
1047 		} else {
1048 			rtnl_lock();
1049 			dev_open(card->dev);
1050 			rtnl_unlock();
1051 		}
1052 		/* this also sets saved unicast addresses */
1053 		qeth_l2_set_multicast_list(card->dev);
1054 	}
1055 	/* let user_space know that device is online */
1056 	kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1057 	return 0;
1058 out_remove:
1059 	card->use_hard_stop = 1;
1060 	qeth_l2_stop_card(card, 0);
1061 	ccw_device_set_offline(CARD_DDEV(card));
1062 	ccw_device_set_offline(CARD_WDEV(card));
1063 	ccw_device_set_offline(CARD_RDEV(card));
1064 	if (recover_flag == CARD_STATE_RECOVER)
1065 		card->state = CARD_STATE_RECOVER;
1066 	else
1067 		card->state = CARD_STATE_DOWN;
1068 	return -ENODEV;
1069 }
1070 
1071 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1072 {
1073 	return __qeth_l2_set_online(gdev, 0);
1074 }
1075 
1076 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1077 					int recovery_mode)
1078 {
1079 	struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1080 	int rc = 0, rc2 = 0, rc3 = 0;
1081 	enum qeth_card_states recover_flag;
1082 
1083 	QETH_DBF_TEXT(SETUP, 3, "setoffl");
1084 	QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1085 
1086 	if (card->dev && netif_carrier_ok(card->dev))
1087 		netif_carrier_off(card->dev);
1088 	recover_flag = card->state;
1089 	qeth_l2_stop_card(card, recovery_mode);
1090 	rc  = ccw_device_set_offline(CARD_DDEV(card));
1091 	rc2 = ccw_device_set_offline(CARD_WDEV(card));
1092 	rc3 = ccw_device_set_offline(CARD_RDEV(card));
1093 	if (!rc)
1094 		rc = (rc2) ? rc2 : rc3;
1095 	if (rc)
1096 		QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1097 	if (recover_flag == CARD_STATE_UP)
1098 		card->state = CARD_STATE_RECOVER;
1099 	/* let user_space know that device is offline */
1100 	kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1101 	return 0;
1102 }
1103 
1104 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1105 {
1106 	return __qeth_l2_set_offline(cgdev, 0);
1107 }
1108 
1109 static int qeth_l2_recover(void *ptr)
1110 {
1111 	struct qeth_card *card;
1112 	int rc = 0;
1113 
1114 	card = (struct qeth_card *) ptr;
1115 	QETH_DBF_TEXT(TRACE, 2, "recover1");
1116 	QETH_DBF_HEX(TRACE, 2, &card, sizeof(void *));
1117 	if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1118 		return 0;
1119 	QETH_DBF_TEXT(TRACE, 2, "recover2");
1120 	PRINT_WARN("Recovery of device %s started ...\n",
1121 		   CARD_BUS_ID(card));
1122 	card->use_hard_stop = 1;
1123 	__qeth_l2_set_offline(card->gdev, 1);
1124 	rc = __qeth_l2_set_online(card->gdev, 1);
1125 	/* don't run another scheduled recovery */
1126 	qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1127 	qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1128 	if (!rc)
1129 		PRINT_INFO("Device %s successfully recovered!\n",
1130 			   CARD_BUS_ID(card));
1131 	else {
1132 		rtnl_lock();
1133 		dev_close(card->dev);
1134 		rtnl_unlock();
1135 		PRINT_INFO("Device %s could not be recovered!\n",
1136 			   CARD_BUS_ID(card));
1137 	}
1138 	return 0;
1139 }
1140 
1141 static int __init qeth_l2_init(void)
1142 {
1143 	PRINT_INFO("register layer 2 discipline\n");
1144 	return 0;
1145 }
1146 
1147 static void __exit qeth_l2_exit(void)
1148 {
1149 	PRINT_INFO("unregister layer 2 discipline\n");
1150 }
1151 
1152 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1153 {
1154 	struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1155 	qeth_qdio_clear_card(card, 0);
1156 	qeth_clear_qdio_buffers(card);
1157 }
1158 
1159 struct ccwgroup_driver qeth_l2_ccwgroup_driver = {
1160 	.probe = qeth_l2_probe_device,
1161 	.remove = qeth_l2_remove_device,
1162 	.set_online = qeth_l2_set_online,
1163 	.set_offline = qeth_l2_set_offline,
1164 	.shutdown = qeth_l2_shutdown,
1165 };
1166 EXPORT_SYMBOL_GPL(qeth_l2_ccwgroup_driver);
1167 
1168 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1169 			   struct qeth_cmd_buffer *iob)
1170 {
1171 	unsigned long flags;
1172 	int rc = 0;
1173 
1174 	QETH_DBF_TEXT(TRACE, 5, "osndctrd");
1175 
1176 	wait_event(card->wait_q,
1177 		   atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1178 	qeth_prepare_control_data(card, len, iob);
1179 	QETH_DBF_TEXT(TRACE, 6, "osnoirqp");
1180 	spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1181 	rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1182 			      (addr_t) iob, 0, 0);
1183 	spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1184 	if (rc) {
1185 		QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1186 			   "ccw_device_start rc = %i\n", rc);
1187 		QETH_DBF_TEXT_(TRACE, 2, " err%d", rc);
1188 		qeth_release_buffer(iob->channel, iob);
1189 		atomic_set(&card->write.irq_pending, 0);
1190 		wake_up(&card->wait_q);
1191 	}
1192 	return rc;
1193 }
1194 
1195 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1196 			struct qeth_cmd_buffer *iob, int data_len)
1197 {
1198 	u16 s1, s2;
1199 
1200 	QETH_DBF_TEXT(TRACE, 4, "osndipa");
1201 
1202 	qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1203 	s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1204 	s2 = (u16)data_len;
1205 	memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1206 	memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1207 	memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1208 	memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1209 	return qeth_osn_send_control_data(card, s1, iob);
1210 }
1211 
1212 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1213 {
1214 	struct qeth_cmd_buffer *iob;
1215 	struct qeth_card *card;
1216 	int rc;
1217 
1218 	QETH_DBF_TEXT(TRACE, 2, "osnsdmc");
1219 	if (!dev)
1220 		return -ENODEV;
1221 	card = dev->ml_priv;
1222 	if (!card)
1223 		return -ENODEV;
1224 	if ((card->state != CARD_STATE_UP) &&
1225 	    (card->state != CARD_STATE_SOFTSETUP))
1226 		return -ENODEV;
1227 	iob = qeth_wait_for_buffer(&card->write);
1228 	memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1229 	rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1230 	return rc;
1231 }
1232 EXPORT_SYMBOL(qeth_osn_assist);
1233 
1234 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1235 		  int (*assist_cb)(struct net_device *, void *),
1236 		  int (*data_cb)(struct sk_buff *))
1237 {
1238 	struct qeth_card *card;
1239 
1240 	QETH_DBF_TEXT(TRACE, 2, "osnreg");
1241 	*dev = qeth_l2_netdev_by_devno(read_dev_no);
1242 	if (*dev == NULL)
1243 		return -ENODEV;
1244 	card = (*dev)->ml_priv;
1245 	if (!card)
1246 		return -ENODEV;
1247 	if ((assist_cb == NULL) || (data_cb == NULL))
1248 		return -EINVAL;
1249 	card->osn_info.assist_cb = assist_cb;
1250 	card->osn_info.data_cb = data_cb;
1251 	return 0;
1252 }
1253 EXPORT_SYMBOL(qeth_osn_register);
1254 
1255 void qeth_osn_deregister(struct net_device *dev)
1256 {
1257 	struct qeth_card *card;
1258 
1259 	QETH_DBF_TEXT(TRACE, 2, "osndereg");
1260 	if (!dev)
1261 		return;
1262 	card = dev->ml_priv;
1263 	if (!card)
1264 		return;
1265 	card->osn_info.assist_cb = NULL;
1266 	card->osn_info.data_cb = NULL;
1267 	return;
1268 }
1269 EXPORT_SYMBOL(qeth_osn_deregister);
1270 
1271 module_init(qeth_l2_init);
1272 module_exit(qeth_l2_exit);
1273 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1274 MODULE_DESCRIPTION("qeth layer 2 discipline");
1275 MODULE_LICENSE("GPL");
1276