qeth: forbid recovery during shutdown
[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, int del)
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 (del) {
212                         if (mc->is_vmac)
213                                 qeth_l2_send_setdelmac(card, mc->mc_addr,
214                                         IPA_CMD_DELVMAC, NULL);
215                         else
216                                 qeth_l2_send_delgroupmac(card, mc->mc_addr);
217                 }
218                 list_del(&mc->list);
219                 kfree(mc);
220         }
221         spin_unlock_bh(&card->mclock);
222 }
223
224 static inline int qeth_l2_get_cast_type(struct qeth_card *card,
225                         struct sk_buff *skb)
226 {
227         if (card->info.type == QETH_CARD_TYPE_OSN)
228                 return RTN_UNSPEC;
229         if (is_broadcast_ether_addr(skb->data))
230                 return RTN_BROADCAST;
231         if (is_multicast_ether_addr(skb->data))
232                 return RTN_MULTICAST;
233         return RTN_UNSPEC;
234 }
235
236 static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
237                         struct sk_buff *skb, int ipv, int cast_type)
238 {
239         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
240
241         memset(hdr, 0, sizeof(struct qeth_hdr));
242         hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
243
244         /* set byte byte 3 to casting flags */
245         if (cast_type == RTN_MULTICAST)
246                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
247         else if (cast_type == RTN_BROADCAST)
248                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
249         else
250                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
251
252         hdr->hdr.l2.pkt_length = skb->len-QETH_HEADER_SIZE;
253         /* VSWITCH relies on the VLAN
254          * information to be present in
255          * the QDIO header */
256         if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
257                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
258                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
259         }
260 }
261
262 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
263                         struct qeth_reply *reply, unsigned long data)
264 {
265         struct qeth_ipa_cmd *cmd;
266
267         QETH_CARD_TEXT(card, 2, "L2sdvcb");
268         cmd = (struct qeth_ipa_cmd *) data;
269         if (cmd->hdr.return_code) {
270                 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x. "
271                           "Continuing\n", cmd->data.setdelvlan.vlan_id,
272                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
273                 QETH_CARD_TEXT_(card, 2, "L2VL%4x", cmd->hdr.command);
274                 QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code);
275         }
276         return 0;
277 }
278
279 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
280                                 enum qeth_ipa_cmds ipacmd)
281 {
282         struct qeth_ipa_cmd *cmd;
283         struct qeth_cmd_buffer *iob;
284
285         QETH_CARD_TEXT_(card, 4, "L2sdv%x", ipacmd);
286         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
287         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
288         cmd->data.setdelvlan.vlan_id = i;
289         return qeth_send_ipa_cmd(card, iob,
290                                  qeth_l2_send_setdelvlan_cb, NULL);
291 }
292
293 static void qeth_l2_process_vlans(struct qeth_card *card)
294 {
295         struct qeth_vlan_vid *id;
296         QETH_CARD_TEXT(card, 3, "L2prcvln");
297         spin_lock_bh(&card->vlanlock);
298         list_for_each_entry(id, &card->vid_list, list) {
299                 qeth_l2_send_setdelvlan(card, id->vid, IPA_CMD_SETVLAN);
300         }
301         spin_unlock_bh(&card->vlanlock);
302 }
303
304 static int qeth_l2_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
305 {
306         struct qeth_card *card = dev->ml_priv;
307         struct qeth_vlan_vid *id;
308
309         QETH_CARD_TEXT_(card, 4, "aid:%d", vid);
310         if (!vid)
311                 return 0;
312         if (card->info.type == QETH_CARD_TYPE_OSM) {
313                 QETH_CARD_TEXT(card, 3, "aidOSM");
314                 return 0;
315         }
316         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
317                 QETH_CARD_TEXT(card, 3, "aidREC");
318                 return 0;
319         }
320         id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
321         if (id) {
322                 id->vid = vid;
323                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
324                 spin_lock_bh(&card->vlanlock);
325                 list_add_tail(&id->list, &card->vid_list);
326                 spin_unlock_bh(&card->vlanlock);
327         } else {
328                 return -ENOMEM;
329         }
330         return 0;
331 }
332
333 static int 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 0;
342         }
343         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
344                 QETH_CARD_TEXT(card, 3, "kidREC");
345                 return 0;
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         return 0;
362 }
363
364 static int qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
365 {
366         int rc = 0;
367
368         QETH_DBF_TEXT(SETUP , 2, "stopcard");
369         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
370
371         qeth_set_allowed_threads(card, 0, 1);
372         if (card->read.state == CH_STATE_UP &&
373             card->write.state == CH_STATE_UP &&
374             (card->state == CARD_STATE_UP)) {
375                 if (recovery_mode &&
376                     card->info.type != QETH_CARD_TYPE_OSN) {
377                         qeth_l2_stop(card->dev);
378                 } else {
379                         rtnl_lock();
380                         dev_close(card->dev);
381                         rtnl_unlock();
382                 }
383                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
384                 card->state = CARD_STATE_SOFTSETUP;
385         }
386         if (card->state == CARD_STATE_SOFTSETUP) {
387                 qeth_l2_del_all_mc(card, 0);
388                 qeth_clear_ipacmd_list(card);
389                 card->state = CARD_STATE_HARDSETUP;
390         }
391         if (card->state == CARD_STATE_HARDSETUP) {
392                 qeth_qdio_clear_card(card, 0);
393                 qeth_clear_qdio_buffers(card);
394                 qeth_clear_working_pool_list(card);
395                 card->state = CARD_STATE_DOWN;
396         }
397         if (card->state == CARD_STATE_DOWN) {
398                 qeth_clear_cmd_buffers(&card->read);
399                 qeth_clear_cmd_buffers(&card->write);
400         }
401         return rc;
402 }
403
404 static int qeth_l2_process_inbound_buffer(struct qeth_card *card,
405                                 int budget, int *done)
406 {
407         int work_done = 0;
408         struct sk_buff *skb;
409         struct qeth_hdr *hdr;
410         unsigned int len;
411
412         *done = 0;
413         BUG_ON(!budget);
414         while (budget) {
415                 skb = qeth_core_get_next_skb(card,
416                         &card->qdio.in_q->bufs[card->rx.b_index],
417                         &card->rx.b_element, &card->rx.e_offset, &hdr);
418                 if (!skb) {
419                         *done = 1;
420                         break;
421                 }
422                 skb->dev = card->dev;
423                 switch (hdr->hdr.l2.id) {
424                 case QETH_HEADER_TYPE_LAYER2:
425                         skb->pkt_type = PACKET_HOST;
426                         skb->protocol = eth_type_trans(skb, skb->dev);
427                         skb->ip_summed = CHECKSUM_NONE;
428                         if (skb->protocol == htons(ETH_P_802_2))
429                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
430                         len = skb->len;
431                         netif_receive_skb(skb);
432                         break;
433                 case QETH_HEADER_TYPE_OSN:
434                         if (card->info.type == QETH_CARD_TYPE_OSN) {
435                                 skb_push(skb, sizeof(struct qeth_hdr));
436                                 skb_copy_to_linear_data(skb, hdr,
437                                                 sizeof(struct qeth_hdr));
438                                 len = skb->len;
439                                 card->osn_info.data_cb(skb);
440                                 break;
441                         }
442                         /* else unknown */
443                 default:
444                         dev_kfree_skb_any(skb);
445                         QETH_CARD_TEXT(card, 3, "inbunkno");
446                         QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
447                         continue;
448                 }
449                 work_done++;
450                 budget--;
451                 card->stats.rx_packets++;
452                 card->stats.rx_bytes += len;
453         }
454         return work_done;
455 }
456
457 static int qeth_l2_poll(struct napi_struct *napi, int budget)
458 {
459         struct qeth_card *card = container_of(napi, struct qeth_card, napi);
460         int work_done = 0;
461         struct qeth_qdio_buffer *buffer;
462         int done;
463         int new_budget = budget;
464
465         if (card->options.performance_stats) {
466                 card->perf_stats.inbound_cnt++;
467                 card->perf_stats.inbound_start_time = qeth_get_micros();
468         }
469
470         while (1) {
471                 if (!card->rx.b_count) {
472                         card->rx.qdio_err = 0;
473                         card->rx.b_count = qdio_get_next_buffers(
474                                 card->data.ccwdev, 0, &card->rx.b_index,
475                                 &card->rx.qdio_err);
476                         if (card->rx.b_count <= 0) {
477                                 card->rx.b_count = 0;
478                                 break;
479                         }
480                         card->rx.b_element =
481                                 &card->qdio.in_q->bufs[card->rx.b_index]
482                                 .buffer->element[0];
483                         card->rx.e_offset = 0;
484                 }
485
486                 while (card->rx.b_count) {
487                         buffer = &card->qdio.in_q->bufs[card->rx.b_index];
488                         if (!(card->rx.qdio_err &&
489                             qeth_check_qdio_errors(card, buffer->buffer,
490                             card->rx.qdio_err, "qinerr")))
491                                 work_done += qeth_l2_process_inbound_buffer(
492                                         card, new_budget, &done);
493                         else
494                                 done = 1;
495
496                         if (done) {
497                                 if (card->options.performance_stats)
498                                         card->perf_stats.bufs_rec++;
499                                 qeth_put_buffer_pool_entry(card,
500                                         buffer->pool_entry);
501                                 qeth_queue_input_buffer(card, card->rx.b_index);
502                                 card->rx.b_count--;
503                                 if (card->rx.b_count) {
504                                         card->rx.b_index =
505                                                 (card->rx.b_index + 1) %
506                                                 QDIO_MAX_BUFFERS_PER_Q;
507                                         card->rx.b_element =
508                                                 &card->qdio.in_q
509                                                 ->bufs[card->rx.b_index]
510                                                 .buffer->element[0];
511                                         card->rx.e_offset = 0;
512                                 }
513                         }
514
515                         if (work_done >= budget)
516                                 goto out;
517                         else
518                                 new_budget = budget - work_done;
519                 }
520         }
521
522         napi_complete(napi);
523         if (qdio_start_irq(card->data.ccwdev, 0))
524                 napi_schedule(&card->napi);
525 out:
526         if (card->options.performance_stats)
527                 card->perf_stats.inbound_time += qeth_get_micros() -
528                         card->perf_stats.inbound_start_time;
529         return work_done;
530 }
531
532 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
533                            enum qeth_ipa_cmds ipacmd,
534                            int (*reply_cb) (struct qeth_card *,
535                                             struct qeth_reply*,
536                                             unsigned long))
537 {
538         struct qeth_ipa_cmd *cmd;
539         struct qeth_cmd_buffer *iob;
540
541         QETH_CARD_TEXT(card, 2, "L2sdmac");
542         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
543         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
544         cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
545         memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
546         return qeth_send_ipa_cmd(card, iob, reply_cb, NULL);
547 }
548
549 static int qeth_l2_send_setmac_cb(struct qeth_card *card,
550                            struct qeth_reply *reply,
551                            unsigned long data)
552 {
553         struct qeth_ipa_cmd *cmd;
554
555         QETH_CARD_TEXT(card, 2, "L2Smaccb");
556         cmd = (struct qeth_ipa_cmd *) data;
557         if (cmd->hdr.return_code) {
558                 QETH_CARD_TEXT_(card, 2, "L2er%x", cmd->hdr.return_code);
559                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
560                 switch (cmd->hdr.return_code) {
561                 case IPA_RC_L2_DUP_MAC:
562                 case IPA_RC_L2_DUP_LAYER3_MAC:
563                         dev_warn(&card->gdev->dev,
564                                 "MAC address %pM already exists\n",
565                                 cmd->data.setdelmac.mac);
566                         break;
567                 case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
568                 case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
569                         dev_warn(&card->gdev->dev,
570                                 "MAC address %pM is not authorized\n",
571                                 cmd->data.setdelmac.mac);
572                         break;
573                 default:
574                         break;
575                 }
576                 cmd->hdr.return_code = -EIO;
577         } else {
578                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
579                 memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac,
580                        OSA_ADDR_LEN);
581                 dev_info(&card->gdev->dev,
582                         "MAC address %pM successfully registered on device %s\n",
583                         card->dev->dev_addr, card->dev->name);
584         }
585         return 0;
586 }
587
588 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
589 {
590         QETH_CARD_TEXT(card, 2, "L2Setmac");
591         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
592                                           qeth_l2_send_setmac_cb);
593 }
594
595 static int qeth_l2_send_delmac_cb(struct qeth_card *card,
596                            struct qeth_reply *reply,
597                            unsigned long data)
598 {
599         struct qeth_ipa_cmd *cmd;
600
601         QETH_CARD_TEXT(card, 2, "L2Dmaccb");
602         cmd = (struct qeth_ipa_cmd *) data;
603         if (cmd->hdr.return_code) {
604                 QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code);
605                 cmd->hdr.return_code = -EIO;
606                 return 0;
607         }
608         card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
609
610         return 0;
611 }
612
613 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
614 {
615         QETH_CARD_TEXT(card, 2, "L2Delmac");
616         if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
617                 return 0;
618         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC,
619                                           qeth_l2_send_delmac_cb);
620 }
621
622 static int qeth_l2_request_initial_mac(struct qeth_card *card)
623 {
624         int rc = 0;
625         char vendor_pre[] = {0x02, 0x00, 0x00};
626
627         QETH_DBF_TEXT(SETUP, 2, "doL2init");
628         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
629
630         rc = qeth_query_setadapterparms(card);
631         if (rc) {
632                 QETH_DBF_MESSAGE(2, "could not query adapter parameters on "
633                         "device %s: x%x\n", CARD_BUS_ID(card), rc);
634         }
635
636         if (card->info.type == QETH_CARD_TYPE_IQD ||
637             card->info.type == QETH_CARD_TYPE_OSM ||
638             card->info.type == QETH_CARD_TYPE_OSX ||
639             card->info.guestlan) {
640                 rc = qeth_setadpparms_change_macaddr(card);
641                 if (rc) {
642                         QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
643                                 "device %s: x%x\n", CARD_BUS_ID(card), rc);
644                         QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
645                         return rc;
646                 }
647                 QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN);
648         } else {
649                 random_ether_addr(card->dev->dev_addr);
650                 memcpy(card->dev->dev_addr, vendor_pre, 3);
651         }
652         return 0;
653 }
654
655 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
656 {
657         struct sockaddr *addr = p;
658         struct qeth_card *card = dev->ml_priv;
659         int rc = 0;
660
661         QETH_CARD_TEXT(card, 3, "setmac");
662
663         if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
664                 QETH_CARD_TEXT(card, 3, "setmcINV");
665                 return -EOPNOTSUPP;
666         }
667
668         if (card->info.type == QETH_CARD_TYPE_OSN ||
669             card->info.type == QETH_CARD_TYPE_OSM ||
670             card->info.type == QETH_CARD_TYPE_OSX) {
671                 QETH_CARD_TEXT(card, 3, "setmcTYP");
672                 return -EOPNOTSUPP;
673         }
674         QETH_CARD_HEX(card, 3, addr->sa_data, OSA_ADDR_LEN);
675         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
676                 QETH_CARD_TEXT(card, 3, "setmcREC");
677                 return -ERESTARTSYS;
678         }
679         rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
680         if (!rc)
681                 rc = qeth_l2_send_setmac(card, addr->sa_data);
682         return rc;
683 }
684
685 static void qeth_l2_set_multicast_list(struct net_device *dev)
686 {
687         struct qeth_card *card = dev->ml_priv;
688         struct netdev_hw_addr *ha;
689
690         if (card->info.type == QETH_CARD_TYPE_OSN)
691                 return ;
692
693         QETH_CARD_TEXT(card, 3, "setmulti");
694         if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
695             (card->state != CARD_STATE_UP))
696                 return;
697         qeth_l2_del_all_mc(card, 1);
698         spin_lock_bh(&card->mclock);
699         netdev_for_each_mc_addr(ha, dev)
700                 qeth_l2_add_mc(card, ha->addr, 0);
701
702         netdev_for_each_uc_addr(ha, dev)
703                 qeth_l2_add_mc(card, ha->addr, 1);
704
705         spin_unlock_bh(&card->mclock);
706         if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
707                 return;
708         qeth_setadp_promisc_mode(card);
709 }
710
711 static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
712 {
713         int rc;
714         struct qeth_hdr *hdr = NULL;
715         int elements = 0;
716         struct qeth_card *card = dev->ml_priv;
717         struct sk_buff *new_skb = skb;
718         int ipv = qeth_get_ip_version(skb);
719         int cast_type = qeth_l2_get_cast_type(card, skb);
720         struct qeth_qdio_out_q *queue = card->qdio.out_qs
721                 [qeth_get_priority_queue(card, skb, ipv, cast_type)];
722         int tx_bytes = skb->len;
723         int data_offset = -1;
724         int elements_needed = 0;
725         int hd_len = 0;
726
727         if ((card->state != CARD_STATE_UP) || !card->lan_online) {
728                 card->stats.tx_carrier_errors++;
729                 goto tx_drop;
730         }
731
732         if ((card->info.type == QETH_CARD_TYPE_OSN) &&
733             (skb->protocol == htons(ETH_P_IPV6)))
734                 goto tx_drop;
735
736         if (card->options.performance_stats) {
737                 card->perf_stats.outbound_cnt++;
738                 card->perf_stats.outbound_start_time = qeth_get_micros();
739         }
740         netif_stop_queue(dev);
741
742         if (card->info.type == QETH_CARD_TYPE_OSN)
743                 hdr = (struct qeth_hdr *)skb->data;
744         else {
745                 if (card->info.type == QETH_CARD_TYPE_IQD) {
746                         new_skb = skb;
747                         data_offset = ETH_HLEN;
748                         hd_len = ETH_HLEN;
749                         hdr = kmem_cache_alloc(qeth_core_header_cache,
750                                                 GFP_ATOMIC);
751                         if (!hdr)
752                                 goto tx_drop;
753                         elements_needed++;
754                         skb_reset_mac_header(new_skb);
755                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
756                         hdr->hdr.l2.pkt_length = new_skb->len;
757                         memcpy(((char *)hdr) + sizeof(struct qeth_hdr),
758                                 skb_mac_header(new_skb), ETH_HLEN);
759                 } else {
760                         /* create a clone with writeable headroom */
761                         new_skb = skb_realloc_headroom(skb,
762                                                 sizeof(struct qeth_hdr));
763                         if (!new_skb)
764                                 goto tx_drop;
765                         hdr = (struct qeth_hdr *)skb_push(new_skb,
766                                                 sizeof(struct qeth_hdr));
767                         skb_set_mac_header(new_skb, sizeof(struct qeth_hdr));
768                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
769                 }
770         }
771
772         elements = qeth_get_elements_no(card, (void *)hdr, new_skb,
773                                                 elements_needed);
774         if (!elements) {
775                 if (data_offset >= 0)
776                         kmem_cache_free(qeth_core_header_cache, hdr);
777                 goto tx_drop;
778         }
779
780         if (card->info.type != QETH_CARD_TYPE_IQD) {
781                 if (qeth_hdr_chk_and_bounce(new_skb,
782                     sizeof(struct qeth_hdr_layer2)))
783                         goto tx_drop;
784                 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
785                                          elements);
786         } else
787                 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
788                                         elements, data_offset, hd_len);
789         if (!rc) {
790                 card->stats.tx_packets++;
791                 card->stats.tx_bytes += tx_bytes;
792                 if (new_skb != skb)
793                         dev_kfree_skb_any(skb);
794                 rc = NETDEV_TX_OK;
795         } else {
796                 if (data_offset >= 0)
797                         kmem_cache_free(qeth_core_header_cache, hdr);
798
799                 if (rc == -EBUSY) {
800                         if (new_skb != skb)
801                                 dev_kfree_skb_any(new_skb);
802                         return NETDEV_TX_BUSY;
803                 } else
804                         goto tx_drop;
805         }
806
807         netif_wake_queue(dev);
808         if (card->options.performance_stats)
809                 card->perf_stats.outbound_time += qeth_get_micros() -
810                         card->perf_stats.outbound_start_time;
811         return rc;
812
813 tx_drop:
814         card->stats.tx_dropped++;
815         card->stats.tx_errors++;
816         if ((new_skb != skb) && new_skb)
817                 dev_kfree_skb_any(new_skb);
818         dev_kfree_skb_any(skb);
819         netif_wake_queue(dev);
820         return NETDEV_TX_OK;
821 }
822
823 static int __qeth_l2_open(struct net_device *dev)
824 {
825         struct qeth_card *card = dev->ml_priv;
826         int rc = 0;
827
828         QETH_CARD_TEXT(card, 4, "qethopen");
829         if (card->state == CARD_STATE_UP)
830                 return rc;
831         if (card->state != CARD_STATE_SOFTSETUP)
832                 return -ENODEV;
833
834         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
835              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
836                 QETH_CARD_TEXT(card, 4, "nomacadr");
837                 return -EPERM;
838         }
839         card->data.state = CH_STATE_UP;
840         card->state = CARD_STATE_UP;
841         netif_start_queue(dev);
842
843         if (qdio_stop_irq(card->data.ccwdev, 0) >= 0) {
844                 napi_enable(&card->napi);
845                 napi_schedule(&card->napi);
846         } else
847                 rc = -EIO;
848         return rc;
849 }
850
851 static int qeth_l2_open(struct net_device *dev)
852 {
853         struct qeth_card *card = dev->ml_priv;
854
855         QETH_CARD_TEXT(card, 5, "qethope_");
856         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
857                 QETH_CARD_TEXT(card, 3, "openREC");
858                 return -ERESTARTSYS;
859         }
860         return __qeth_l2_open(dev);
861 }
862
863 static int qeth_l2_stop(struct net_device *dev)
864 {
865         struct qeth_card *card = dev->ml_priv;
866
867         QETH_CARD_TEXT(card, 4, "qethstop");
868         netif_tx_disable(dev);
869         if (card->state == CARD_STATE_UP) {
870                 card->state = CARD_STATE_SOFTSETUP;
871                 napi_disable(&card->napi);
872         }
873         return 0;
874 }
875
876 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
877 {
878         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
879
880         INIT_LIST_HEAD(&card->vid_list);
881         INIT_LIST_HEAD(&card->mc_list);
882         card->options.layer2 = 1;
883         card->info.hwtrap = 0;
884         card->discipline.start_poll = qeth_qdio_start_poll;
885         card->discipline.input_handler = (qdio_handler_t *)
886                 qeth_qdio_input_handler;
887         card->discipline.output_handler = (qdio_handler_t *)
888                 qeth_qdio_output_handler;
889         card->discipline.recover = qeth_l2_recover;
890         return 0;
891 }
892
893 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
894 {
895         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
896
897         qeth_set_allowed_threads(card, 0, 1);
898         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
899
900         if (cgdev->state == CCWGROUP_ONLINE)
901                 qeth_l2_set_offline(cgdev);
902
903         if (card->dev) {
904                 unregister_netdev(card->dev);
905                 card->dev = NULL;
906         }
907         return;
908 }
909
910 static const struct ethtool_ops qeth_l2_ethtool_ops = {
911         .get_link = ethtool_op_get_link,
912         .get_strings = qeth_core_get_strings,
913         .get_ethtool_stats = qeth_core_get_ethtool_stats,
914         .get_sset_count = qeth_core_get_sset_count,
915         .get_drvinfo = qeth_core_get_drvinfo,
916         .get_settings = qeth_core_ethtool_get_settings,
917 };
918
919 static const struct ethtool_ops qeth_l2_osn_ops = {
920         .get_strings = qeth_core_get_strings,
921         .get_ethtool_stats = qeth_core_get_ethtool_stats,
922         .get_sset_count = qeth_core_get_sset_count,
923         .get_drvinfo = qeth_core_get_drvinfo,
924 };
925
926 static const struct net_device_ops qeth_l2_netdev_ops = {
927         .ndo_open               = qeth_l2_open,
928         .ndo_stop               = qeth_l2_stop,
929         .ndo_get_stats          = qeth_get_stats,
930         .ndo_start_xmit         = qeth_l2_hard_start_xmit,
931         .ndo_validate_addr      = eth_validate_addr,
932         .ndo_set_rx_mode        = qeth_l2_set_multicast_list,
933         .ndo_do_ioctl           = qeth_l2_do_ioctl,
934         .ndo_set_mac_address    = qeth_l2_set_mac_address,
935         .ndo_change_mtu         = qeth_change_mtu,
936         .ndo_vlan_rx_add_vid    = qeth_l2_vlan_rx_add_vid,
937         .ndo_vlan_rx_kill_vid   = qeth_l2_vlan_rx_kill_vid,
938         .ndo_tx_timeout         = qeth_tx_timeout,
939 };
940
941 static int qeth_l2_setup_netdev(struct qeth_card *card)
942 {
943         switch (card->info.type) {
944         case QETH_CARD_TYPE_IQD:
945                 card->dev = alloc_netdev(0, "hsi%d", ether_setup);
946                 break;
947         case QETH_CARD_TYPE_OSN:
948                 card->dev = alloc_netdev(0, "osn%d", ether_setup);
949                 card->dev->flags |= IFF_NOARP;
950                 break;
951         default:
952                 card->dev = alloc_etherdev(0);
953         }
954
955         if (!card->dev)
956                 return -ENODEV;
957
958         card->dev->ml_priv = card;
959         card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
960         card->dev->mtu = card->info.initial_mtu;
961         card->dev->netdev_ops = &qeth_l2_netdev_ops;
962         if (card->info.type != QETH_CARD_TYPE_OSN)
963                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_ethtool_ops);
964         else
965                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_osn_ops);
966         card->dev->features |= NETIF_F_HW_VLAN_FILTER;
967         card->info.broadcast_capable = 1;
968         qeth_l2_request_initial_mac(card);
969         SET_NETDEV_DEV(card->dev, &card->gdev->dev);
970         netif_napi_add(card->dev, &card->napi, qeth_l2_poll, QETH_NAPI_WEIGHT);
971         return register_netdev(card->dev);
972 }
973
974 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
975 {
976         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
977         int rc = 0;
978         enum qeth_card_states recover_flag;
979
980         BUG_ON(!card);
981         mutex_lock(&card->discipline_mutex);
982         mutex_lock(&card->conf_mutex);
983         QETH_DBF_TEXT(SETUP, 2, "setonlin");
984         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
985
986         recover_flag = card->state;
987         rc = qeth_core_hardsetup_card(card);
988         if (rc) {
989                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
990                 rc = -ENODEV;
991                 goto out_remove;
992         }
993
994         if (!card->dev && qeth_l2_setup_netdev(card)) {
995                 rc = -ENODEV;
996                 goto out_remove;
997         }
998
999         if (card->info.type != QETH_CARD_TYPE_OSN)
1000                 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
1001
1002         if (qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP)) {
1003                 if (card->info.hwtrap &&
1004                     qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM))
1005                         card->info.hwtrap = 0;
1006         } else
1007                 card->info.hwtrap = 0;
1008
1009         card->state = CARD_STATE_HARDSETUP;
1010         memset(&card->rx, 0, sizeof(struct qeth_rx));
1011         qeth_print_status_message(card);
1012
1013         /* softsetup */
1014         QETH_DBF_TEXT(SETUP, 2, "softsetp");
1015
1016         rc = qeth_send_startlan(card);
1017         if (rc) {
1018                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1019                 if (rc == 0xe080) {
1020                         dev_warn(&card->gdev->dev,
1021                                 "The LAN is offline\n");
1022                         card->lan_online = 0;
1023                         goto contin;
1024                 }
1025                 rc = -ENODEV;
1026                 goto out_remove;
1027         } else
1028                 card->lan_online = 1;
1029
1030 contin:
1031         if ((card->info.type == QETH_CARD_TYPE_OSD) ||
1032             (card->info.type == QETH_CARD_TYPE_OSX))
1033                 /* configure isolation level */
1034                 qeth_set_access_ctrl_online(card);
1035
1036         if (card->info.type != QETH_CARD_TYPE_OSN &&
1037             card->info.type != QETH_CARD_TYPE_OSM)
1038                 qeth_l2_process_vlans(card);
1039
1040         netif_tx_disable(card->dev);
1041
1042         rc = qeth_init_qdio_queues(card);
1043         if (rc) {
1044                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1045                 rc = -ENODEV;
1046                 goto out_remove;
1047         }
1048         card->state = CARD_STATE_SOFTSETUP;
1049         if (card->lan_online)
1050                 netif_carrier_on(card->dev);
1051         else
1052                 netif_carrier_off(card->dev);
1053
1054         qeth_set_allowed_threads(card, 0xffffffff, 0);
1055         if (recover_flag == CARD_STATE_RECOVER) {
1056                 if (recovery_mode &&
1057                     card->info.type != QETH_CARD_TYPE_OSN) {
1058                         __qeth_l2_open(card->dev);
1059                 } else {
1060                         rtnl_lock();
1061                         dev_open(card->dev);
1062                         rtnl_unlock();
1063                 }
1064                 /* this also sets saved unicast addresses */
1065                 qeth_l2_set_multicast_list(card->dev);
1066         }
1067         /* let user_space know that device is online */
1068         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1069         mutex_unlock(&card->conf_mutex);
1070         mutex_unlock(&card->discipline_mutex);
1071         return 0;
1072
1073 out_remove:
1074         qeth_l2_stop_card(card, 0);
1075         ccw_device_set_offline(CARD_DDEV(card));
1076         ccw_device_set_offline(CARD_WDEV(card));
1077         ccw_device_set_offline(CARD_RDEV(card));
1078         if (recover_flag == CARD_STATE_RECOVER)
1079                 card->state = CARD_STATE_RECOVER;
1080         else
1081                 card->state = CARD_STATE_DOWN;
1082         mutex_unlock(&card->conf_mutex);
1083         mutex_unlock(&card->discipline_mutex);
1084         return rc;
1085 }
1086
1087 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1088 {
1089         return __qeth_l2_set_online(gdev, 0);
1090 }
1091
1092 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1093                                         int recovery_mode)
1094 {
1095         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1096         int rc = 0, rc2 = 0, rc3 = 0;
1097         enum qeth_card_states recover_flag;
1098
1099         mutex_lock(&card->discipline_mutex);
1100         mutex_lock(&card->conf_mutex);
1101         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1102         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1103
1104         if (card->dev && netif_carrier_ok(card->dev))
1105                 netif_carrier_off(card->dev);
1106         recover_flag = card->state;
1107         if ((!recovery_mode && card->info.hwtrap) || card->info.hwtrap == 2) {
1108                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1109                 card->info.hwtrap = 1;
1110         }
1111         qeth_l2_stop_card(card, recovery_mode);
1112         rc  = ccw_device_set_offline(CARD_DDEV(card));
1113         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1114         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1115         if (!rc)
1116                 rc = (rc2) ? rc2 : rc3;
1117         if (rc)
1118                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1119         if (recover_flag == CARD_STATE_UP)
1120                 card->state = CARD_STATE_RECOVER;
1121         /* let user_space know that device is offline */
1122         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1123         mutex_unlock(&card->conf_mutex);
1124         mutex_unlock(&card->discipline_mutex);
1125         return 0;
1126 }
1127
1128 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1129 {
1130         return __qeth_l2_set_offline(cgdev, 0);
1131 }
1132
1133 static int qeth_l2_recover(void *ptr)
1134 {
1135         struct qeth_card *card;
1136         int rc = 0;
1137
1138         card = (struct qeth_card *) ptr;
1139         QETH_CARD_TEXT(card, 2, "recover1");
1140         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1141                 return 0;
1142         QETH_CARD_TEXT(card, 2, "recover2");
1143         dev_warn(&card->gdev->dev,
1144                 "A recovery process has been started for the device\n");
1145         __qeth_l2_set_offline(card->gdev, 1);
1146         rc = __qeth_l2_set_online(card->gdev, 1);
1147         if (!rc)
1148                 dev_info(&card->gdev->dev,
1149                         "Device successfully recovered!\n");
1150         else {
1151                 rtnl_lock();
1152                 dev_close(card->dev);
1153                 rtnl_unlock();
1154                 dev_warn(&card->gdev->dev, "The qeth device driver "
1155                         "failed to recover an error on the device\n");
1156         }
1157         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1158         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1159         return 0;
1160 }
1161
1162 static int __init qeth_l2_init(void)
1163 {
1164         pr_info("register layer 2 discipline\n");
1165         return 0;
1166 }
1167
1168 static void __exit qeth_l2_exit(void)
1169 {
1170         pr_info("unregister layer 2 discipline\n");
1171 }
1172
1173 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1174 {
1175         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1176         qeth_set_allowed_threads(card, 0, 1);
1177         if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
1178                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1179         qeth_qdio_clear_card(card, 0);
1180         qeth_clear_qdio_buffers(card);
1181 }
1182
1183 static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev)
1184 {
1185         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1186
1187         if (card->dev)
1188                 netif_device_detach(card->dev);
1189         qeth_set_allowed_threads(card, 0, 1);
1190         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1191         if (gdev->state == CCWGROUP_OFFLINE)
1192                 return 0;
1193         if (card->state == CARD_STATE_UP) {
1194                 if (card->info.hwtrap)
1195                         qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1196                 __qeth_l2_set_offline(card->gdev, 1);
1197         } else
1198                 __qeth_l2_set_offline(card->gdev, 0);
1199         return 0;
1200 }
1201
1202 static int qeth_l2_pm_resume(struct ccwgroup_device *gdev)
1203 {
1204         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1205         int rc = 0;
1206
1207         if (gdev->state == CCWGROUP_OFFLINE)
1208                 goto out;
1209
1210         if (card->state == CARD_STATE_RECOVER) {
1211                 rc = __qeth_l2_set_online(card->gdev, 1);
1212                 if (rc) {
1213                         rtnl_lock();
1214                         dev_close(card->dev);
1215                         rtnl_unlock();
1216                 }
1217         } else
1218                 rc = __qeth_l2_set_online(card->gdev, 0);
1219 out:
1220         qeth_set_allowed_threads(card, 0xffffffff, 0);
1221         if (card->dev)
1222                 netif_device_attach(card->dev);
1223         if (rc)
1224                 dev_warn(&card->gdev->dev, "The qeth device driver "
1225                         "failed to recover an error on the device\n");
1226         return rc;
1227 }
1228
1229 struct ccwgroup_driver qeth_l2_ccwgroup_driver = {
1230         .probe = qeth_l2_probe_device,
1231         .remove = qeth_l2_remove_device,
1232         .set_online = qeth_l2_set_online,
1233         .set_offline = qeth_l2_set_offline,
1234         .shutdown = qeth_l2_shutdown,
1235         .freeze = qeth_l2_pm_suspend,
1236         .thaw = qeth_l2_pm_resume,
1237         .restore = qeth_l2_pm_resume,
1238 };
1239 EXPORT_SYMBOL_GPL(qeth_l2_ccwgroup_driver);
1240
1241 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1242                            struct qeth_cmd_buffer *iob)
1243 {
1244         unsigned long flags;
1245         int rc = 0;
1246
1247         QETH_CARD_TEXT(card, 5, "osndctrd");
1248
1249         wait_event(card->wait_q,
1250                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1251         qeth_prepare_control_data(card, len, iob);
1252         QETH_CARD_TEXT(card, 6, "osnoirqp");
1253         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1254         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1255                               (addr_t) iob, 0, 0);
1256         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1257         if (rc) {
1258                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1259                            "ccw_device_start rc = %i\n", rc);
1260                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1261                 qeth_release_buffer(iob->channel, iob);
1262                 atomic_set(&card->write.irq_pending, 0);
1263                 wake_up(&card->wait_q);
1264         }
1265         return rc;
1266 }
1267
1268 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1269                         struct qeth_cmd_buffer *iob, int data_len)
1270 {
1271         u16 s1, s2;
1272
1273         QETH_CARD_TEXT(card, 4, "osndipa");
1274
1275         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1276         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1277         s2 = (u16)data_len;
1278         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1279         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1280         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1281         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1282         return qeth_osn_send_control_data(card, s1, iob);
1283 }
1284
1285 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1286 {
1287         struct qeth_cmd_buffer *iob;
1288         struct qeth_card *card;
1289         int rc;
1290
1291         if (!dev)
1292                 return -ENODEV;
1293         card = dev->ml_priv;
1294         if (!card)
1295                 return -ENODEV;
1296         QETH_CARD_TEXT(card, 2, "osnsdmc");
1297         if ((card->state != CARD_STATE_UP) &&
1298             (card->state != CARD_STATE_SOFTSETUP))
1299                 return -ENODEV;
1300         iob = qeth_wait_for_buffer(&card->write);
1301         memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1302         rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1303         return rc;
1304 }
1305 EXPORT_SYMBOL(qeth_osn_assist);
1306
1307 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1308                   int (*assist_cb)(struct net_device *, void *),
1309                   int (*data_cb)(struct sk_buff *))
1310 {
1311         struct qeth_card *card;
1312
1313         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1314         if (*dev == NULL)
1315                 return -ENODEV;
1316         card = (*dev)->ml_priv;
1317         if (!card)
1318                 return -ENODEV;
1319         QETH_CARD_TEXT(card, 2, "osnreg");
1320         if ((assist_cb == NULL) || (data_cb == NULL))
1321                 return -EINVAL;
1322         card->osn_info.assist_cb = assist_cb;
1323         card->osn_info.data_cb = data_cb;
1324         return 0;
1325 }
1326 EXPORT_SYMBOL(qeth_osn_register);
1327
1328 void qeth_osn_deregister(struct net_device *dev)
1329 {
1330         struct qeth_card *card;
1331
1332         if (!dev)
1333                 return;
1334         card = dev->ml_priv;
1335         if (!card)
1336                 return;
1337         QETH_CARD_TEXT(card, 2, "osndereg");
1338         card->osn_info.assist_cb = NULL;
1339         card->osn_info.data_cb = NULL;
1340         return;
1341 }
1342 EXPORT_SYMBOL(qeth_osn_deregister);
1343
1344 module_init(qeth_l2_init);
1345 module_exit(qeth_l2_exit);
1346 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1347 MODULE_DESCRIPTION("qeth layer 2 discipline");
1348 MODULE_LICENSE("GPL");