7a7a1b664781073aa09d10bfa134a1d9b8eb6b09
[linux-2.6.git] / drivers / s390 / net / qeth_l2_main.c
1 /*
2  *  drivers/s390/net/qeth_l2_main.c
3  *
4  *    Copyright IBM Corp. 2007, 2009
5  *    Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
6  *               Frank Pavlic <fpavlic@de.ibm.com>,
7  *               Thomas Spatzier <tspat@de.ibm.com>,
8  *               Frank Blaschka <frank.blaschka@de.ibm.com>
9  */
10
11 #define KMSG_COMPONENT "qeth"
12 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
13
14 #include <linux/module.h>
15 #include <linux/moduleparam.h>
16 #include <linux/string.h>
17 #include <linux/errno.h>
18 #include <linux/kernel.h>
19 #include <linux/slab.h>
20 #include <linux/etherdevice.h>
21 #include <linux/mii.h>
22 #include <linux/ip.h>
23 #include <linux/list.h>
24
25 #include "qeth_core.h"
26
27 static int qeth_l2_set_offline(struct ccwgroup_device *);
28 static int qeth_l2_stop(struct net_device *);
29 static int qeth_l2_send_delmac(struct qeth_card *, __u8 *);
30 static int qeth_l2_send_setdelmac(struct qeth_card *, __u8 *,
31                            enum qeth_ipa_cmds,
32                            int (*reply_cb) (struct qeth_card *,
33                                             struct qeth_reply*,
34                                             unsigned long));
35 static void qeth_l2_set_multicast_list(struct net_device *);
36 static int qeth_l2_recover(void *);
37
38 static int qeth_l2_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
39 {
40         struct qeth_card *card = dev->ml_priv;
41         struct mii_ioctl_data *mii_data;
42         int rc = 0;
43
44         if (!card)
45                 return -ENODEV;
46
47         if ((card->state != CARD_STATE_UP) &&
48                 (card->state != CARD_STATE_SOFTSETUP))
49                 return -ENODEV;
50
51         if (card->info.type == QETH_CARD_TYPE_OSN)
52                 return -EPERM;
53
54         switch (cmd) {
55         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
56                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
57                 break;
58         case SIOC_QETH_GET_CARD_TYPE:
59                 if ((card->info.type == QETH_CARD_TYPE_OSD ||
60                      card->info.type == QETH_CARD_TYPE_OSM ||
61                      card->info.type == QETH_CARD_TYPE_OSX) &&
62                     !card->info.guestlan)
63                         return 1;
64                 return 0;
65                 break;
66         case SIOCGMIIPHY:
67                 mii_data = if_mii(rq);
68                 mii_data->phy_id = 0;
69                 break;
70         case SIOCGMIIREG:
71                 mii_data = if_mii(rq);
72                 if (mii_data->phy_id != 0)
73                         rc = -EINVAL;
74                 else
75                         mii_data->val_out = qeth_mdio_read(dev,
76                                 mii_data->phy_id, mii_data->reg_num);
77                 break;
78         default:
79                 rc = -EOPNOTSUPP;
80         }
81         if (rc)
82                 QETH_CARD_TEXT_(card, 2, "ioce%d", rc);
83         return rc;
84 }
85
86 static int qeth_l2_verify_dev(struct net_device *dev)
87 {
88         struct qeth_card *card;
89         unsigned long flags;
90         int rc = 0;
91
92         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
93         list_for_each_entry(card, &qeth_core_card_list.list, list) {
94                 if (card->dev == dev) {
95                         rc = QETH_REAL_CARD;
96                         break;
97                 }
98         }
99         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
100
101         return rc;
102 }
103
104 static struct net_device *qeth_l2_netdev_by_devno(unsigned char *read_dev_no)
105 {
106         struct qeth_card *card;
107         struct net_device *ndev;
108         __u16 temp_dev_no;
109         unsigned long flags;
110         struct ccw_dev_id read_devid;
111
112         ndev = NULL;
113         memcpy(&temp_dev_no, read_dev_no, 2);
114         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
115         list_for_each_entry(card, &qeth_core_card_list.list, list) {
116                 ccw_device_get_id(CARD_RDEV(card), &read_devid);
117                 if (read_devid.devno == temp_dev_no) {
118                         ndev = card->dev;
119                         break;
120                 }
121         }
122         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
123         return ndev;
124 }
125
126 static int qeth_l2_send_setgroupmac_cb(struct qeth_card *card,
127                                 struct qeth_reply *reply,
128                                 unsigned long data)
129 {
130         struct qeth_ipa_cmd *cmd;
131         __u8 *mac;
132
133         QETH_CARD_TEXT(card, 2, "L2Sgmacb");
134         cmd = (struct qeth_ipa_cmd *) data;
135         mac = &cmd->data.setdelmac.mac[0];
136         /* MAC already registered, needed in couple/uncouple case */
137         if (cmd->hdr.return_code ==  IPA_RC_L2_DUP_MAC) {
138                 QETH_DBF_MESSAGE(2, "Group MAC %pM already existing on %s \n",
139                           mac, QETH_CARD_IFNAME(card));
140                 cmd->hdr.return_code = 0;
141         }
142         if (cmd->hdr.return_code)
143                 QETH_DBF_MESSAGE(2, "Could not set group MAC %pM on %s: %x\n",
144                           mac, 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_CARD_TEXT(card, 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_CARD_TEXT(card, 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 %pM on %s: %x\n",
167                           mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code);
168         return 0;
169 }
170
171 static int qeth_l2_send_delgroupmac(struct qeth_card *card, __u8 *mac)
172 {
173         QETH_CARD_TEXT(card, 2, "L2Dgmac");
174         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELGMAC,
175                                           qeth_l2_send_delgroupmac_cb);
176 }
177
178 static void qeth_l2_add_mc(struct qeth_card *card, __u8 *mac, int vmac)
179 {
180         struct qeth_mc_mac *mc;
181         int rc;
182
183         mc = kmalloc(sizeof(struct qeth_mc_mac), GFP_ATOMIC);
184
185         if (!mc)
186                 return;
187
188         memcpy(mc->mc_addr, mac, OSA_ADDR_LEN);
189         mc->mc_addrlen = OSA_ADDR_LEN;
190         mc->is_vmac = vmac;
191
192         if (vmac) {
193                 rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
194                                         NULL);
195         } else {
196                 rc = qeth_l2_send_setgroupmac(card, mac);
197         }
198
199         if (!rc)
200                 list_add_tail(&mc->list, &card->mc_list);
201         else
202                 kfree(mc);
203 }
204
205 static void qeth_l2_del_all_mc(struct qeth_card *card)
206 {
207         struct qeth_mc_mac *mc, *tmp;
208
209         spin_lock_bh(&card->mclock);
210         list_for_each_entry_safe(mc, tmp, &card->mc_list, list) {
211                 if (mc->is_vmac)
212                         qeth_l2_send_setdelmac(card, mc->mc_addr,
213                                         IPA_CMD_DELVMAC, NULL);
214                 else
215                         qeth_l2_send_delgroupmac(card, mc->mc_addr);
216                 list_del(&mc->list);
217                 kfree(mc);
218         }
219         spin_unlock_bh(&card->mclock);
220 }
221
222 static inline int qeth_l2_get_cast_type(struct qeth_card *card,
223                         struct sk_buff *skb)
224 {
225         if (card->info.type == QETH_CARD_TYPE_OSN)
226                 return RTN_UNSPEC;
227         if (is_broadcast_ether_addr(skb->data))
228                 return RTN_BROADCAST;
229         if (is_multicast_ether_addr(skb->data))
230                 return RTN_MULTICAST;
231         return RTN_UNSPEC;
232 }
233
234 static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
235                         struct sk_buff *skb, int ipv, int cast_type)
236 {
237         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
238
239         memset(hdr, 0, sizeof(struct qeth_hdr));
240         hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
241
242         /* set byte byte 3 to casting flags */
243         if (cast_type == RTN_MULTICAST)
244                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
245         else if (cast_type == RTN_BROADCAST)
246                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
247         else
248                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
249
250         hdr->hdr.l2.pkt_length = skb->len-QETH_HEADER_SIZE;
251         /* VSWITCH relies on the VLAN
252          * information to be present in
253          * the QDIO header */
254         if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
255                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
256                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
257         }
258 }
259
260 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
261                         struct qeth_reply *reply, unsigned long data)
262 {
263         struct qeth_ipa_cmd *cmd;
264
265         QETH_CARD_TEXT(card, 2, "L2sdvcb");
266         cmd = (struct qeth_ipa_cmd *) data;
267         if (cmd->hdr.return_code) {
268                 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x. "
269                           "Continuing\n", cmd->data.setdelvlan.vlan_id,
270                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
271                 QETH_CARD_TEXT_(card, 2, "L2VL%4x", cmd->hdr.command);
272                 QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code);
273         }
274         return 0;
275 }
276
277 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
278                                 enum qeth_ipa_cmds ipacmd)
279 {
280         struct qeth_ipa_cmd *cmd;
281         struct qeth_cmd_buffer *iob;
282
283         QETH_CARD_TEXT_(card, 4, "L2sdv%x", ipacmd);
284         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
285         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
286         cmd->data.setdelvlan.vlan_id = i;
287         return qeth_send_ipa_cmd(card, iob,
288                                  qeth_l2_send_setdelvlan_cb, NULL);
289 }
290
291 static void qeth_l2_process_vlans(struct qeth_card *card, int clear)
292 {
293         struct qeth_vlan_vid *id;
294         QETH_CARD_TEXT(card, 3, "L2prcvln");
295         spin_lock_bh(&card->vlanlock);
296         list_for_each_entry(id, &card->vid_list, list) {
297                 if (clear)
298                         qeth_l2_send_setdelvlan(card, id->vid,
299                                 IPA_CMD_DELVLAN);
300                 else
301                         qeth_l2_send_setdelvlan(card, id->vid,
302                                 IPA_CMD_SETVLAN);
303         }
304         spin_unlock_bh(&card->vlanlock);
305 }
306
307 static void qeth_l2_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
308 {
309         struct qeth_card *card = dev->ml_priv;
310         struct qeth_vlan_vid *id;
311
312         QETH_CARD_TEXT_(card, 4, "aid:%d", vid);
313         if (!vid)
314                 return;
315         if (card->info.type == QETH_CARD_TYPE_OSM) {
316                 QETH_CARD_TEXT(card, 3, "aidOSM");
317                 return;
318         }
319         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
320                 QETH_CARD_TEXT(card, 3, "aidREC");
321                 return;
322         }
323         id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
324         if (id) {
325                 id->vid = vid;
326                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
327                 spin_lock_bh(&card->vlanlock);
328                 list_add_tail(&id->list, &card->vid_list);
329                 spin_unlock_bh(&card->vlanlock);
330         }
331 }
332
333 static void qeth_l2_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
334 {
335         struct qeth_vlan_vid *id, *tmpid = NULL;
336         struct qeth_card *card = dev->ml_priv;
337
338         QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
339         if (card->info.type == QETH_CARD_TYPE_OSM) {
340                 QETH_CARD_TEXT(card, 3, "kidOSM");
341                 return;
342         }
343         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
344                 QETH_CARD_TEXT(card, 3, "kidREC");
345                 return;
346         }
347         spin_lock_bh(&card->vlanlock);
348         list_for_each_entry(id, &card->vid_list, list) {
349                 if (id->vid == vid) {
350                         list_del(&id->list);
351                         tmpid = id;
352                         break;
353                 }
354         }
355         spin_unlock_bh(&card->vlanlock);
356         if (tmpid) {
357                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
358                 kfree(tmpid);
359         }
360         qeth_l2_set_multicast_list(card->dev);
361 }
362
363 static int qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
364 {
365         int rc = 0;
366
367         QETH_DBF_TEXT(SETUP , 2, "stopcard");
368         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
369
370         qeth_set_allowed_threads(card, 0, 1);
371         if (card->read.state == CH_STATE_UP &&
372             card->write.state == CH_STATE_UP &&
373             (card->state == CARD_STATE_UP)) {
374                 if (recovery_mode &&
375                     card->info.type != QETH_CARD_TYPE_OSN) {
376                         qeth_l2_stop(card->dev);
377                 } else {
378                         rtnl_lock();
379                         dev_close(card->dev);
380                         rtnl_unlock();
381                 }
382                 if (!card->use_hard_stop ||
383                         recovery_mode) {
384                         __u8 *mac = &card->dev->dev_addr[0];
385                         rc = qeth_l2_send_delmac(card, mac);
386                         QETH_DBF_TEXT_(SETUP, 2, "Lerr%d", rc);
387                 }
388                 card->state = CARD_STATE_SOFTSETUP;
389         }
390         if (card->state == CARD_STATE_SOFTSETUP) {
391                 qeth_l2_process_vlans(card, 1);
392                 if (!card->use_hard_stop ||
393                         recovery_mode)
394                         qeth_l2_del_all_mc(card);
395                 qeth_clear_ipacmd_list(card);
396                 card->state = CARD_STATE_HARDSETUP;
397         }
398         if (card->state == CARD_STATE_HARDSETUP) {
399                 qeth_qdio_clear_card(card, 0);
400                 qeth_clear_qdio_buffers(card);
401                 qeth_clear_working_pool_list(card);
402                 card->state = CARD_STATE_DOWN;
403         }
404         if (card->state == CARD_STATE_DOWN) {
405                 qeth_clear_cmd_buffers(&card->read);
406                 qeth_clear_cmd_buffers(&card->write);
407         }
408         card->use_hard_stop = 0;
409         return rc;
410 }
411
412 static int qeth_l2_process_inbound_buffer(struct qeth_card *card,
413                                 int budget, int *done)
414 {
415         int work_done = 0;
416         struct sk_buff *skb;
417         struct qeth_hdr *hdr;
418         unsigned int len;
419
420         *done = 0;
421         BUG_ON(!budget);
422         while (budget) {
423                 skb = qeth_core_get_next_skb(card,
424                         card->qdio.in_q->bufs[card->rx.b_index].buffer,
425                         &card->rx.b_element, &card->rx.e_offset, &hdr);
426                 if (!skb) {
427                         *done = 1;
428                         break;
429                 }
430                 skb->dev = card->dev;
431                 switch (hdr->hdr.l2.id) {
432                 case QETH_HEADER_TYPE_LAYER2:
433                         skb->pkt_type = PACKET_HOST;
434                         skb->protocol = eth_type_trans(skb, skb->dev);
435                         if (card->options.checksum_type == NO_CHECKSUMMING)
436                                 skb->ip_summed = CHECKSUM_UNNECESSARY;
437                         else
438                                 skb->ip_summed = CHECKSUM_NONE;
439                         if (skb->protocol == htons(ETH_P_802_2))
440                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
441                         len = skb->len;
442                         netif_receive_skb(skb);
443                         break;
444                 case QETH_HEADER_TYPE_OSN:
445                         if (card->info.type == QETH_CARD_TYPE_OSN) {
446                                 skb_push(skb, sizeof(struct qeth_hdr));
447                                 skb_copy_to_linear_data(skb, hdr,
448                                                 sizeof(struct qeth_hdr));
449                                 len = skb->len;
450                                 card->osn_info.data_cb(skb);
451                                 break;
452                         }
453                         /* else unknown */
454                 default:
455                         dev_kfree_skb_any(skb);
456                         QETH_CARD_TEXT(card, 3, "inbunkno");
457                         QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
458                         continue;
459                 }
460                 work_done++;
461                 budget--;
462                 card->stats.rx_packets++;
463                 card->stats.rx_bytes += len;
464         }
465         return work_done;
466 }
467
468 static int qeth_l2_poll(struct napi_struct *napi, int budget)
469 {
470         struct qeth_card *card = container_of(napi, struct qeth_card, napi);
471         int work_done = 0;
472         struct qeth_qdio_buffer *buffer;
473         int done;
474         int new_budget = budget;
475
476         if (card->options.performance_stats) {
477                 card->perf_stats.inbound_cnt++;
478                 card->perf_stats.inbound_start_time = qeth_get_micros();
479         }
480
481         while (1) {
482                 if (!card->rx.b_count) {
483                         card->rx.qdio_err = 0;
484                         card->rx.b_count = qdio_get_next_buffers(
485                                 card->data.ccwdev, 0, &card->rx.b_index,
486                                 &card->rx.qdio_err);
487                         if (card->rx.b_count <= 0) {
488                                 card->rx.b_count = 0;
489                                 break;
490                         }
491                         card->rx.b_element =
492                                 &card->qdio.in_q->bufs[card->rx.b_index]
493                                 .buffer->element[0];
494                         card->rx.e_offset = 0;
495                 }
496
497                 while (card->rx.b_count) {
498                         buffer = &card->qdio.in_q->bufs[card->rx.b_index];
499                         if (!(card->rx.qdio_err &&
500                             qeth_check_qdio_errors(card, buffer->buffer,
501                             card->rx.qdio_err, "qinerr")))
502                                 work_done += qeth_l2_process_inbound_buffer(
503                                         card, new_budget, &done);
504                         else
505                                 done = 1;
506
507                         if (done) {
508                                 if (card->options.performance_stats)
509                                         card->perf_stats.bufs_rec++;
510                                 qeth_put_buffer_pool_entry(card,
511                                         buffer->pool_entry);
512                                 qeth_queue_input_buffer(card, card->rx.b_index);
513                                 card->rx.b_count--;
514                                 if (card->rx.b_count) {
515                                         card->rx.b_index =
516                                                 (card->rx.b_index + 1) %
517                                                 QDIO_MAX_BUFFERS_PER_Q;
518                                         card->rx.b_element =
519                                                 &card->qdio.in_q
520                                                 ->bufs[card->rx.b_index]
521                                                 .buffer->element[0];
522                                         card->rx.e_offset = 0;
523                                 }
524                         }
525
526                         if (work_done >= budget)
527                                 goto out;
528                         else
529                                 new_budget = budget - work_done;
530                 }
531         }
532
533         napi_complete(napi);
534         if (qdio_start_irq(card->data.ccwdev, 0))
535                 napi_schedule(&card->napi);
536 out:
537         if (card->options.performance_stats)
538                 card->perf_stats.inbound_time += qeth_get_micros() -
539                         card->perf_stats.inbound_start_time;
540         return work_done;
541 }
542
543 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
544                            enum qeth_ipa_cmds ipacmd,
545                            int (*reply_cb) (struct qeth_card *,
546                                             struct qeth_reply*,
547                                             unsigned long))
548 {
549         struct qeth_ipa_cmd *cmd;
550         struct qeth_cmd_buffer *iob;
551
552         QETH_CARD_TEXT(card, 2, "L2sdmac");
553         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
554         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
555         cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
556         memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
557         return qeth_send_ipa_cmd(card, iob, reply_cb, NULL);
558 }
559
560 static int qeth_l2_send_setmac_cb(struct qeth_card *card,
561                            struct qeth_reply *reply,
562                            unsigned long data)
563 {
564         struct qeth_ipa_cmd *cmd;
565
566         QETH_CARD_TEXT(card, 2, "L2Smaccb");
567         cmd = (struct qeth_ipa_cmd *) data;
568         if (cmd->hdr.return_code) {
569                 QETH_CARD_TEXT_(card, 2, "L2er%x", cmd->hdr.return_code);
570                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
571                 switch (cmd->hdr.return_code) {
572                 case IPA_RC_L2_DUP_MAC:
573                 case IPA_RC_L2_DUP_LAYER3_MAC:
574                         dev_warn(&card->gdev->dev,
575                                 "MAC address %pM already exists\n",
576                                 card->dev->dev_addr);
577                         break;
578                 case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
579                 case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
580                         dev_warn(&card->gdev->dev,
581                                 "MAC address %pM is not authorized\n",
582                                 card->dev->dev_addr);
583                         break;
584                 default:
585                         break;
586                 }
587                 cmd->hdr.return_code = -EIO;
588         } else {
589                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
590                 memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac,
591                        OSA_ADDR_LEN);
592                 dev_info(&card->gdev->dev,
593                         "MAC address %pM successfully registered on device %s\n",
594                         card->dev->dev_addr, card->dev->name);
595         }
596         return 0;
597 }
598
599 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
600 {
601         QETH_CARD_TEXT(card, 2, "L2Setmac");
602         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
603                                           qeth_l2_send_setmac_cb);
604 }
605
606 static int qeth_l2_send_delmac_cb(struct qeth_card *card,
607                            struct qeth_reply *reply,
608                            unsigned long data)
609 {
610         struct qeth_ipa_cmd *cmd;
611
612         QETH_CARD_TEXT(card, 2, "L2Dmaccb");
613         cmd = (struct qeth_ipa_cmd *) data;
614         if (cmd->hdr.return_code) {
615                 QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code);
616                 cmd->hdr.return_code = -EIO;
617                 return 0;
618         }
619         card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
620
621         return 0;
622 }
623
624 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
625 {
626         QETH_CARD_TEXT(card, 2, "L2Delmac");
627         if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
628                 return 0;
629         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC,
630                                           qeth_l2_send_delmac_cb);
631 }
632
633 static int qeth_l2_request_initial_mac(struct qeth_card *card)
634 {
635         int rc = 0;
636         char vendor_pre[] = {0x02, 0x00, 0x00};
637
638         QETH_DBF_TEXT(SETUP, 2, "doL2init");
639         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
640
641         rc = qeth_query_setadapterparms(card);
642         if (rc) {
643                 QETH_DBF_MESSAGE(2, "could not query adapter parameters on "
644                         "device %s: x%x\n", CARD_BUS_ID(card), rc);
645         }
646
647         if (card->info.type == QETH_CARD_TYPE_IQD ||
648             card->info.type == QETH_CARD_TYPE_OSM ||
649             card->info.type == QETH_CARD_TYPE_OSX ||
650             card->info.guestlan) {
651                 rc = qeth_setadpparms_change_macaddr(card);
652                 if (rc) {
653                         QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
654                                 "device %s: x%x\n", CARD_BUS_ID(card), rc);
655                         QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
656                         return rc;
657                 }
658                 QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN);
659         } else {
660                 random_ether_addr(card->dev->dev_addr);
661                 memcpy(card->dev->dev_addr, vendor_pre, 3);
662         }
663         return 0;
664 }
665
666 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
667 {
668         struct sockaddr *addr = p;
669         struct qeth_card *card = dev->ml_priv;
670         int rc = 0;
671
672         QETH_CARD_TEXT(card, 3, "setmac");
673
674         if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
675                 QETH_CARD_TEXT(card, 3, "setmcINV");
676                 return -EOPNOTSUPP;
677         }
678
679         if (card->info.type == QETH_CARD_TYPE_OSN ||
680             card->info.type == QETH_CARD_TYPE_OSM ||
681             card->info.type == QETH_CARD_TYPE_OSX) {
682                 QETH_CARD_TEXT(card, 3, "setmcTYP");
683                 return -EOPNOTSUPP;
684         }
685         QETH_CARD_HEX(card, 3, addr->sa_data, OSA_ADDR_LEN);
686         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
687                 QETH_CARD_TEXT(card, 3, "setmcREC");
688                 return -ERESTARTSYS;
689         }
690         rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
691         if (!rc)
692                 rc = qeth_l2_send_setmac(card, addr->sa_data);
693         return rc;
694 }
695
696 static void qeth_l2_set_multicast_list(struct net_device *dev)
697 {
698         struct qeth_card *card = dev->ml_priv;
699         struct netdev_hw_addr *ha;
700
701         if (card->info.type == QETH_CARD_TYPE_OSN)
702                 return ;
703
704         QETH_CARD_TEXT(card, 3, "setmulti");
705         if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
706             (card->state != CARD_STATE_UP))
707                 return;
708         qeth_l2_del_all_mc(card);
709         spin_lock_bh(&card->mclock);
710         netdev_for_each_mc_addr(ha, dev)
711                 qeth_l2_add_mc(card, ha->addr, 0);
712
713         netdev_for_each_uc_addr(ha, dev)
714                 qeth_l2_add_mc(card, ha->addr, 1);
715
716         spin_unlock_bh(&card->mclock);
717         if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
718                 return;
719         qeth_setadp_promisc_mode(card);
720 }
721
722 static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
723 {
724         int rc;
725         struct qeth_hdr *hdr = NULL;
726         int elements = 0;
727         struct qeth_card *card = dev->ml_priv;
728         struct sk_buff *new_skb = skb;
729         int ipv = qeth_get_ip_version(skb);
730         int cast_type = qeth_l2_get_cast_type(card, skb);
731         struct qeth_qdio_out_q *queue = card->qdio.out_qs
732                 [qeth_get_priority_queue(card, skb, ipv, cast_type)];
733         int tx_bytes = skb->len;
734         int data_offset = -1;
735         int elements_needed = 0;
736         int hd_len = 0;
737
738         if ((card->state != CARD_STATE_UP) || !card->lan_online) {
739                 card->stats.tx_carrier_errors++;
740                 goto tx_drop;
741         }
742
743         if ((card->info.type == QETH_CARD_TYPE_OSN) &&
744             (skb->protocol == htons(ETH_P_IPV6)))
745                 goto tx_drop;
746
747         if (card->options.performance_stats) {
748                 card->perf_stats.outbound_cnt++;
749                 card->perf_stats.outbound_start_time = qeth_get_micros();
750         }
751         netif_stop_queue(dev);
752
753         if (card->info.type == QETH_CARD_TYPE_OSN)
754                 hdr = (struct qeth_hdr *)skb->data;
755         else {
756                 if (card->info.type == QETH_CARD_TYPE_IQD) {
757                         new_skb = skb;
758                         data_offset = ETH_HLEN;
759                         hd_len = ETH_HLEN;
760                         hdr = kmem_cache_alloc(qeth_core_header_cache,
761                                                 GFP_ATOMIC);
762                         if (!hdr)
763                                 goto tx_drop;
764                         elements_needed++;
765                         skb_reset_mac_header(new_skb);
766                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
767                         hdr->hdr.l2.pkt_length = new_skb->len;
768                         memcpy(((char *)hdr) + sizeof(struct qeth_hdr),
769                                 skb_mac_header(new_skb), ETH_HLEN);
770                 } else {
771                         /* create a clone with writeable headroom */
772                         new_skb = skb_realloc_headroom(skb,
773                                                 sizeof(struct qeth_hdr));
774                         if (!new_skb)
775                                 goto tx_drop;
776                         hdr = (struct qeth_hdr *)skb_push(new_skb,
777                                                 sizeof(struct qeth_hdr));
778                         skb_set_mac_header(new_skb, sizeof(struct qeth_hdr));
779                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
780                 }
781         }
782
783         elements = qeth_get_elements_no(card, (void *)hdr, new_skb,
784                                                 elements_needed);
785         if (!elements) {
786                 if (data_offset >= 0)
787                         kmem_cache_free(qeth_core_header_cache, hdr);
788                 goto tx_drop;
789         }
790
791         if (card->info.type != QETH_CARD_TYPE_IQD) {
792                 if (qeth_hdr_chk_and_bounce(new_skb,
793                     sizeof(struct qeth_hdr_layer2)))
794                         goto tx_drop;
795                 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
796                                          elements);
797         } else
798                 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
799                                         elements, data_offset, hd_len);
800         if (!rc) {
801                 card->stats.tx_packets++;
802                 card->stats.tx_bytes += tx_bytes;
803                 if (new_skb != skb)
804                         dev_kfree_skb_any(skb);
805                 rc = NETDEV_TX_OK;
806         } else {
807                 if (data_offset >= 0)
808                         kmem_cache_free(qeth_core_header_cache, hdr);
809
810                 if (rc == -EBUSY) {
811                         if (new_skb != skb)
812                                 dev_kfree_skb_any(new_skb);
813                         return NETDEV_TX_BUSY;
814                 } else
815                         goto tx_drop;
816         }
817
818         netif_wake_queue(dev);
819         if (card->options.performance_stats)
820                 card->perf_stats.outbound_time += qeth_get_micros() -
821                         card->perf_stats.outbound_start_time;
822         return rc;
823
824 tx_drop:
825         card->stats.tx_dropped++;
826         card->stats.tx_errors++;
827         if ((new_skb != skb) && new_skb)
828                 dev_kfree_skb_any(new_skb);
829         dev_kfree_skb_any(skb);
830         netif_wake_queue(dev);
831         return NETDEV_TX_OK;
832 }
833
834 static int qeth_l2_open(struct net_device *dev)
835 {
836         struct qeth_card *card = dev->ml_priv;
837         int rc = 0;
838
839         QETH_CARD_TEXT(card, 4, "qethopen");
840         if (card->state != CARD_STATE_SOFTSETUP)
841                 return -ENODEV;
842
843         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
844              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
845                 QETH_CARD_TEXT(card, 4, "nomacadr");
846                 return -EPERM;
847         }
848         card->data.state = CH_STATE_UP;
849         card->state = CARD_STATE_UP;
850         netif_start_queue(dev);
851
852         if (qdio_stop_irq(card->data.ccwdev, 0) >= 0) {
853                 napi_enable(&card->napi);
854                 napi_schedule(&card->napi);
855         } else
856                 rc = -EIO;
857         return rc;
858 }
859
860 static int qeth_l2_stop(struct net_device *dev)
861 {
862         struct qeth_card *card = dev->ml_priv;
863
864         QETH_CARD_TEXT(card, 4, "qethstop");
865         netif_tx_disable(dev);
866         if (card->state == CARD_STATE_UP) {
867                 card->state = CARD_STATE_SOFTSETUP;
868                 napi_disable(&card->napi);
869         }
870         return 0;
871 }
872
873 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
874 {
875         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
876
877         INIT_LIST_HEAD(&card->vid_list);
878         INIT_LIST_HEAD(&card->mc_list);
879         card->options.layer2 = 1;
880         card->discipline.start_poll = qeth_qdio_start_poll;
881         card->discipline.input_handler = (qdio_handler_t *)
882                 qeth_qdio_input_handler;
883         card->discipline.output_handler = (qdio_handler_t *)
884                 qeth_qdio_output_handler;
885         card->discipline.recover = qeth_l2_recover;
886         return 0;
887 }
888
889 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
890 {
891         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
892
893         qeth_set_allowed_threads(card, 0, 1);
894         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
895
896         if (cgdev->state == CCWGROUP_ONLINE) {
897                 card->use_hard_stop = 1;
898                 qeth_l2_set_offline(cgdev);
899         }
900
901         if (card->dev) {
902                 unregister_netdev(card->dev);
903                 card->dev = NULL;
904         }
905         return;
906 }
907
908 static const struct ethtool_ops qeth_l2_ethtool_ops = {
909         .get_link = ethtool_op_get_link,
910         .get_strings = qeth_core_get_strings,
911         .get_ethtool_stats = qeth_core_get_ethtool_stats,
912         .get_sset_count = qeth_core_get_sset_count,
913         .get_drvinfo = qeth_core_get_drvinfo,
914         .get_settings = qeth_core_ethtool_get_settings,
915 };
916
917 static const struct ethtool_ops qeth_l2_osn_ops = {
918         .get_strings = qeth_core_get_strings,
919         .get_ethtool_stats = qeth_core_get_ethtool_stats,
920         .get_sset_count = qeth_core_get_sset_count,
921         .get_drvinfo = qeth_core_get_drvinfo,
922 };
923
924 static const struct net_device_ops qeth_l2_netdev_ops = {
925         .ndo_open               = qeth_l2_open,
926         .ndo_stop               = qeth_l2_stop,
927         .ndo_get_stats          = qeth_get_stats,
928         .ndo_start_xmit         = qeth_l2_hard_start_xmit,
929         .ndo_validate_addr      = eth_validate_addr,
930         .ndo_set_multicast_list = qeth_l2_set_multicast_list,
931         .ndo_do_ioctl           = qeth_l2_do_ioctl,
932         .ndo_set_mac_address    = qeth_l2_set_mac_address,
933         .ndo_change_mtu         = qeth_change_mtu,
934         .ndo_vlan_rx_add_vid    = qeth_l2_vlan_rx_add_vid,
935         .ndo_vlan_rx_kill_vid   = qeth_l2_vlan_rx_kill_vid,
936         .ndo_tx_timeout         = qeth_tx_timeout,
937 };
938
939 static int qeth_l2_setup_netdev(struct qeth_card *card)
940 {
941         switch (card->info.type) {
942         case QETH_CARD_TYPE_IQD:
943                 card->dev = alloc_netdev(0, "hsi%d", ether_setup);
944                 break;
945         case QETH_CARD_TYPE_OSN:
946                 card->dev = alloc_netdev(0, "osn%d", ether_setup);
947                 card->dev->flags |= IFF_NOARP;
948                 break;
949         default:
950                 card->dev = alloc_etherdev(0);
951         }
952
953         if (!card->dev)
954                 return -ENODEV;
955
956         card->dev->ml_priv = card;
957         card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
958         card->dev->mtu = card->info.initial_mtu;
959         card->dev->netdev_ops = &qeth_l2_netdev_ops;
960         if (card->info.type != QETH_CARD_TYPE_OSN)
961                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_ethtool_ops);
962         else
963                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_osn_ops);
964         card->dev->features |= NETIF_F_HW_VLAN_FILTER;
965         card->info.broadcast_capable = 1;
966         qeth_l2_request_initial_mac(card);
967         SET_NETDEV_DEV(card->dev, &card->gdev->dev);
968         netif_napi_add(card->dev, &card->napi, qeth_l2_poll, QETH_NAPI_WEIGHT);
969         return register_netdev(card->dev);
970 }
971
972 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
973 {
974         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
975         int rc = 0;
976         enum qeth_card_states recover_flag;
977
978         BUG_ON(!card);
979         mutex_lock(&card->discipline_mutex);
980         mutex_lock(&card->conf_mutex);
981         QETH_DBF_TEXT(SETUP, 2, "setonlin");
982         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
983
984         recover_flag = card->state;
985         rc = qeth_core_hardsetup_card(card);
986         if (rc) {
987                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
988                 rc = -ENODEV;
989                 goto out_remove;
990         }
991
992         if (!card->dev && qeth_l2_setup_netdev(card)) {
993                 rc = -ENODEV;
994                 goto out_remove;
995         }
996
997         if (card->info.type != QETH_CARD_TYPE_OSN)
998                 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
999
1000         card->state = CARD_STATE_HARDSETUP;
1001         memset(&card->rx, 0, sizeof(struct qeth_rx));
1002         qeth_print_status_message(card);
1003
1004         /* softsetup */
1005         QETH_DBF_TEXT(SETUP, 2, "softsetp");
1006
1007         rc = qeth_send_startlan(card);
1008         if (rc) {
1009                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1010                 if (rc == 0xe080) {
1011                         dev_warn(&card->gdev->dev,
1012                                 "The LAN is offline\n");
1013                         card->lan_online = 0;
1014                         goto contin;
1015                 }
1016                 rc = -ENODEV;
1017                 goto out_remove;
1018         } else
1019                 card->lan_online = 1;
1020
1021 contin:
1022         if ((card->info.type == QETH_CARD_TYPE_OSD) ||
1023             (card->info.type == QETH_CARD_TYPE_OSX))
1024                 /* configure isolation level */
1025                 qeth_set_access_ctrl_online(card);
1026
1027         if (card->info.type != QETH_CARD_TYPE_OSN &&
1028             card->info.type != QETH_CARD_TYPE_OSM)
1029                 qeth_l2_process_vlans(card, 0);
1030
1031         netif_tx_disable(card->dev);
1032
1033         rc = qeth_init_qdio_queues(card);
1034         if (rc) {
1035                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1036                 rc = -ENODEV;
1037                 goto out_remove;
1038         }
1039         card->state = CARD_STATE_SOFTSETUP;
1040         if (card->lan_online)
1041                 netif_carrier_on(card->dev);
1042         else
1043                 netif_carrier_off(card->dev);
1044
1045         qeth_set_allowed_threads(card, 0xffffffff, 0);
1046         if (recover_flag == CARD_STATE_RECOVER) {
1047                 if (recovery_mode &&
1048                     card->info.type != QETH_CARD_TYPE_OSN) {
1049                         qeth_l2_open(card->dev);
1050                 } else {
1051                         rtnl_lock();
1052                         dev_open(card->dev);
1053                         rtnl_unlock();
1054                 }
1055                 /* this also sets saved unicast addresses */
1056                 qeth_l2_set_multicast_list(card->dev);
1057         }
1058         /* let user_space know that device is online */
1059         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1060         mutex_unlock(&card->conf_mutex);
1061         mutex_unlock(&card->discipline_mutex);
1062         return 0;
1063
1064 out_remove:
1065         card->use_hard_stop = 1;
1066         qeth_l2_stop_card(card, 0);
1067         ccw_device_set_offline(CARD_DDEV(card));
1068         ccw_device_set_offline(CARD_WDEV(card));
1069         ccw_device_set_offline(CARD_RDEV(card));
1070         if (recover_flag == CARD_STATE_RECOVER)
1071                 card->state = CARD_STATE_RECOVER;
1072         else
1073                 card->state = CARD_STATE_DOWN;
1074         mutex_unlock(&card->conf_mutex);
1075         mutex_unlock(&card->discipline_mutex);
1076         return rc;
1077 }
1078
1079 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1080 {
1081         return __qeth_l2_set_online(gdev, 0);
1082 }
1083
1084 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1085                                         int recovery_mode)
1086 {
1087         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1088         int rc = 0, rc2 = 0, rc3 = 0;
1089         enum qeth_card_states recover_flag;
1090
1091         mutex_lock(&card->discipline_mutex);
1092         mutex_lock(&card->conf_mutex);
1093         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1094         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1095
1096         if (card->dev && netif_carrier_ok(card->dev))
1097                 netif_carrier_off(card->dev);
1098         recover_flag = card->state;
1099         qeth_l2_stop_card(card, recovery_mode);
1100         rc  = ccw_device_set_offline(CARD_DDEV(card));
1101         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1102         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1103         if (!rc)
1104                 rc = (rc2) ? rc2 : rc3;
1105         if (rc)
1106                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1107         if (recover_flag == CARD_STATE_UP)
1108                 card->state = CARD_STATE_RECOVER;
1109         /* let user_space know that device is offline */
1110         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1111         mutex_unlock(&card->conf_mutex);
1112         mutex_unlock(&card->discipline_mutex);
1113         return 0;
1114 }
1115
1116 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1117 {
1118         return __qeth_l2_set_offline(cgdev, 0);
1119 }
1120
1121 static int qeth_l2_recover(void *ptr)
1122 {
1123         struct qeth_card *card;
1124         int rc = 0;
1125
1126         card = (struct qeth_card *) ptr;
1127         QETH_CARD_TEXT(card, 2, "recover1");
1128         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1129                 return 0;
1130         QETH_CARD_TEXT(card, 2, "recover2");
1131         dev_warn(&card->gdev->dev,
1132                 "A recovery process has been started for the device\n");
1133         card->use_hard_stop = 1;
1134         __qeth_l2_set_offline(card->gdev, 1);
1135         rc = __qeth_l2_set_online(card->gdev, 1);
1136         if (!rc)
1137                 dev_info(&card->gdev->dev,
1138                         "Device successfully recovered!\n");
1139         else {
1140                 rtnl_lock();
1141                 dev_close(card->dev);
1142                 rtnl_unlock();
1143                 dev_warn(&card->gdev->dev, "The qeth device driver "
1144                         "failed to recover an error on the device\n");
1145         }
1146         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1147         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1148         return 0;
1149 }
1150
1151 static int __init qeth_l2_init(void)
1152 {
1153         pr_info("register layer 2 discipline\n");
1154         return 0;
1155 }
1156
1157 static void __exit qeth_l2_exit(void)
1158 {
1159         pr_info("unregister layer 2 discipline\n");
1160 }
1161
1162 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1163 {
1164         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1165         qeth_qdio_clear_card(card, 0);
1166         qeth_clear_qdio_buffers(card);
1167 }
1168
1169 static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev)
1170 {
1171         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1172
1173         if (card->dev)
1174                 netif_device_detach(card->dev);
1175         qeth_set_allowed_threads(card, 0, 1);
1176         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1177         if (gdev->state == CCWGROUP_OFFLINE)
1178                 return 0;
1179         if (card->state == CARD_STATE_UP) {
1180                 card->use_hard_stop = 1;
1181                 __qeth_l2_set_offline(card->gdev, 1);
1182         } else
1183                 __qeth_l2_set_offline(card->gdev, 0);
1184         return 0;
1185 }
1186
1187 static int qeth_l2_pm_resume(struct ccwgroup_device *gdev)
1188 {
1189         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1190         int rc = 0;
1191
1192         if (gdev->state == CCWGROUP_OFFLINE)
1193                 goto out;
1194
1195         if (card->state == CARD_STATE_RECOVER) {
1196                 rc = __qeth_l2_set_online(card->gdev, 1);
1197                 if (rc) {
1198                         rtnl_lock();
1199                         dev_close(card->dev);
1200                         rtnl_unlock();
1201                 }
1202         } else
1203                 rc = __qeth_l2_set_online(card->gdev, 0);
1204 out:
1205         qeth_set_allowed_threads(card, 0xffffffff, 0);
1206         if (card->dev)
1207                 netif_device_attach(card->dev);
1208         if (rc)
1209                 dev_warn(&card->gdev->dev, "The qeth device driver "
1210                         "failed to recover an error on the device\n");
1211         return rc;
1212 }
1213
1214 struct ccwgroup_driver qeth_l2_ccwgroup_driver = {
1215         .probe = qeth_l2_probe_device,
1216         .remove = qeth_l2_remove_device,
1217         .set_online = qeth_l2_set_online,
1218         .set_offline = qeth_l2_set_offline,
1219         .shutdown = qeth_l2_shutdown,
1220         .freeze = qeth_l2_pm_suspend,
1221         .thaw = qeth_l2_pm_resume,
1222         .restore = qeth_l2_pm_resume,
1223 };
1224 EXPORT_SYMBOL_GPL(qeth_l2_ccwgroup_driver);
1225
1226 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1227                            struct qeth_cmd_buffer *iob)
1228 {
1229         unsigned long flags;
1230         int rc = 0;
1231
1232         QETH_CARD_TEXT(card, 5, "osndctrd");
1233
1234         wait_event(card->wait_q,
1235                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1236         qeth_prepare_control_data(card, len, iob);
1237         QETH_CARD_TEXT(card, 6, "osnoirqp");
1238         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1239         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1240                               (addr_t) iob, 0, 0);
1241         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1242         if (rc) {
1243                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1244                            "ccw_device_start rc = %i\n", rc);
1245                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1246                 qeth_release_buffer(iob->channel, iob);
1247                 atomic_set(&card->write.irq_pending, 0);
1248                 wake_up(&card->wait_q);
1249         }
1250         return rc;
1251 }
1252
1253 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1254                         struct qeth_cmd_buffer *iob, int data_len)
1255 {
1256         u16 s1, s2;
1257
1258         QETH_CARD_TEXT(card, 4, "osndipa");
1259
1260         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1261         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1262         s2 = (u16)data_len;
1263         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1264         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1265         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1266         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1267         return qeth_osn_send_control_data(card, s1, iob);
1268 }
1269
1270 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1271 {
1272         struct qeth_cmd_buffer *iob;
1273         struct qeth_card *card;
1274         int rc;
1275
1276         if (!dev)
1277                 return -ENODEV;
1278         card = dev->ml_priv;
1279         if (!card)
1280                 return -ENODEV;
1281         QETH_CARD_TEXT(card, 2, "osnsdmc");
1282         if ((card->state != CARD_STATE_UP) &&
1283             (card->state != CARD_STATE_SOFTSETUP))
1284                 return -ENODEV;
1285         iob = qeth_wait_for_buffer(&card->write);
1286         memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1287         rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1288         return rc;
1289 }
1290 EXPORT_SYMBOL(qeth_osn_assist);
1291
1292 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1293                   int (*assist_cb)(struct net_device *, void *),
1294                   int (*data_cb)(struct sk_buff *))
1295 {
1296         struct qeth_card *card;
1297
1298         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1299         if (*dev == NULL)
1300                 return -ENODEV;
1301         card = (*dev)->ml_priv;
1302         if (!card)
1303                 return -ENODEV;
1304         QETH_CARD_TEXT(card, 2, "osnreg");
1305         if ((assist_cb == NULL) || (data_cb == NULL))
1306                 return -EINVAL;
1307         card->osn_info.assist_cb = assist_cb;
1308         card->osn_info.data_cb = data_cb;
1309         return 0;
1310 }
1311 EXPORT_SYMBOL(qeth_osn_register);
1312
1313 void qeth_osn_deregister(struct net_device *dev)
1314 {
1315         struct qeth_card *card;
1316
1317         if (!dev)
1318                 return;
1319         card = dev->ml_priv;
1320         if (!card)
1321                 return;
1322         QETH_CARD_TEXT(card, 2, "osndereg");
1323         card->osn_info.assist_cb = NULL;
1324         card->osn_info.data_cb = NULL;
1325         return;
1326 }
1327 EXPORT_SYMBOL(qeth_osn_deregister);
1328
1329 module_init(qeth_l2_init);
1330 module_exit(qeth_l2_exit);
1331 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1332 MODULE_DESCRIPTION("qeth layer 2 discipline");
1333 MODULE_LICENSE("GPL");