Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
[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_OSAE) &&
60                     !card->info.guestlan)
61                         return 1;
62                 return 0;
63                 break;
64         case SIOCGMIIPHY:
65                 mii_data = if_mii(rq);
66                 mii_data->phy_id = 0;
67                 break;
68         case SIOCGMIIREG:
69                 mii_data = if_mii(rq);
70                 if (mii_data->phy_id != 0)
71                         rc = -EINVAL;
72                 else
73                         mii_data->val_out = qeth_mdio_read(dev,
74                                 mii_data->phy_id, mii_data->reg_num);
75                 break;
76         default:
77                 rc = -EOPNOTSUPP;
78         }
79         if (rc)
80                 QETH_DBF_TEXT_(TRACE, 2, "ioce%d", rc);
81         return rc;
82 }
83
84 static int qeth_l2_verify_dev(struct net_device *dev)
85 {
86         struct qeth_card *card;
87         unsigned long flags;
88         int rc = 0;
89
90         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
91         list_for_each_entry(card, &qeth_core_card_list.list, list) {
92                 if (card->dev == dev) {
93                         rc = QETH_REAL_CARD;
94                         break;
95                 }
96         }
97         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
98
99         return rc;
100 }
101
102 static struct net_device *qeth_l2_netdev_by_devno(unsigned char *read_dev_no)
103 {
104         struct qeth_card *card;
105         struct net_device *ndev;
106         __u16 temp_dev_no;
107         unsigned long flags;
108         struct ccw_dev_id read_devid;
109
110         ndev = NULL;
111         memcpy(&temp_dev_no, read_dev_no, 2);
112         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
113         list_for_each_entry(card, &qeth_core_card_list.list, list) {
114                 ccw_device_get_id(CARD_RDEV(card), &read_devid);
115                 if (read_devid.devno == temp_dev_no) {
116                         ndev = card->dev;
117                         break;
118                 }
119         }
120         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
121         return ndev;
122 }
123
124 static int qeth_l2_send_setgroupmac_cb(struct qeth_card *card,
125                                 struct qeth_reply *reply,
126                                 unsigned long data)
127 {
128         struct qeth_ipa_cmd *cmd;
129         __u8 *mac;
130
131         QETH_DBF_TEXT(TRACE, 2, "L2Sgmacb");
132         cmd = (struct qeth_ipa_cmd *) data;
133         mac = &cmd->data.setdelmac.mac[0];
134         /* MAC already registered, needed in couple/uncouple case */
135         if (cmd->hdr.return_code ==  IPA_RC_L2_DUP_MAC) {
136                 QETH_DBF_MESSAGE(2, "Group MAC %pM already existing on %s \n",
137                           mac, QETH_CARD_IFNAME(card));
138                 cmd->hdr.return_code = 0;
139         }
140         if (cmd->hdr.return_code)
141                 QETH_DBF_MESSAGE(2, "Could not set group MAC %pM on %s: %x\n",
142                           mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code);
143         return 0;
144 }
145
146 static int qeth_l2_send_setgroupmac(struct qeth_card *card, __u8 *mac)
147 {
148         QETH_DBF_TEXT(TRACE, 2, "L2Sgmac");
149         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETGMAC,
150                                           qeth_l2_send_setgroupmac_cb);
151 }
152
153 static int qeth_l2_send_delgroupmac_cb(struct qeth_card *card,
154                                 struct qeth_reply *reply,
155                                 unsigned long data)
156 {
157         struct qeth_ipa_cmd *cmd;
158         __u8 *mac;
159
160         QETH_DBF_TEXT(TRACE, 2, "L2Dgmacb");
161         cmd = (struct qeth_ipa_cmd *) data;
162         mac = &cmd->data.setdelmac.mac[0];
163         if (cmd->hdr.return_code)
164                 QETH_DBF_MESSAGE(2, "Could not delete group MAC %pM on %s: %x\n",
165                           mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code);
166         return 0;
167 }
168
169 static int qeth_l2_send_delgroupmac(struct qeth_card *card, __u8 *mac)
170 {
171         QETH_DBF_TEXT(TRACE, 2, "L2Dgmac");
172         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELGMAC,
173                                           qeth_l2_send_delgroupmac_cb);
174 }
175
176 static void qeth_l2_add_mc(struct qeth_card *card, __u8 *mac, int vmac)
177 {
178         struct qeth_mc_mac *mc;
179         int rc;
180
181         mc = kmalloc(sizeof(struct qeth_mc_mac), GFP_ATOMIC);
182
183         if (!mc)
184                 return;
185
186         memcpy(mc->mc_addr, mac, OSA_ADDR_LEN);
187         mc->mc_addrlen = OSA_ADDR_LEN;
188         mc->is_vmac = vmac;
189
190         if (vmac) {
191                 rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
192                                         NULL);
193         } else {
194                 rc = qeth_l2_send_setgroupmac(card, mac);
195         }
196
197         if (!rc)
198                 list_add_tail(&mc->list, &card->mc_list);
199         else
200                 kfree(mc);
201 }
202
203 static void qeth_l2_del_all_mc(struct qeth_card *card)
204 {
205         struct qeth_mc_mac *mc, *tmp;
206
207         spin_lock_bh(&card->mclock);
208         list_for_each_entry_safe(mc, tmp, &card->mc_list, list) {
209                 if (mc->is_vmac)
210                         qeth_l2_send_setdelmac(card, mc->mc_addr,
211                                         IPA_CMD_DELVMAC, NULL);
212                 else
213                         qeth_l2_send_delgroupmac(card, mc->mc_addr);
214                 list_del(&mc->list);
215                 kfree(mc);
216         }
217         spin_unlock_bh(&card->mclock);
218 }
219
220 static inline int qeth_l2_get_cast_type(struct qeth_card *card,
221                         struct sk_buff *skb)
222 {
223         if (card->info.type == QETH_CARD_TYPE_OSN)
224                 return RTN_UNSPEC;
225         if (is_broadcast_ether_addr(skb->data))
226                 return RTN_BROADCAST;
227         if (is_multicast_ether_addr(skb->data))
228                 return RTN_MULTICAST;
229         return RTN_UNSPEC;
230 }
231
232 static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
233                         struct sk_buff *skb, int ipv, int cast_type)
234 {
235         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
236
237         memset(hdr, 0, sizeof(struct qeth_hdr));
238         hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
239
240         /* set byte byte 3 to casting flags */
241         if (cast_type == RTN_MULTICAST)
242                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
243         else if (cast_type == RTN_BROADCAST)
244                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
245         else
246                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
247
248         hdr->hdr.l2.pkt_length = skb->len-QETH_HEADER_SIZE;
249         /* VSWITCH relies on the VLAN
250          * information to be present in
251          * the QDIO header */
252         if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
253                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
254                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
255         }
256 }
257
258 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
259                         struct qeth_reply *reply, unsigned long data)
260 {
261         struct qeth_ipa_cmd *cmd;
262
263         QETH_DBF_TEXT(TRACE, 2, "L2sdvcb");
264         cmd = (struct qeth_ipa_cmd *) data;
265         if (cmd->hdr.return_code) {
266                 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x. "
267                           "Continuing\n", cmd->data.setdelvlan.vlan_id,
268                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
269                 QETH_DBF_TEXT_(TRACE, 2, "L2VL%4x", cmd->hdr.command);
270                 QETH_DBF_TEXT_(TRACE, 2, "L2%s", CARD_BUS_ID(card));
271                 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
272         }
273         return 0;
274 }
275
276 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
277                                 enum qeth_ipa_cmds ipacmd)
278 {
279         struct qeth_ipa_cmd *cmd;
280         struct qeth_cmd_buffer *iob;
281
282         QETH_DBF_TEXT_(TRACE, 4, "L2sdv%x", ipacmd);
283         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
284         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
285         cmd->data.setdelvlan.vlan_id = i;
286         return qeth_send_ipa_cmd(card, iob,
287                                  qeth_l2_send_setdelvlan_cb, NULL);
288 }
289
290 static void qeth_l2_process_vlans(struct qeth_card *card, int clear)
291 {
292         struct qeth_vlan_vid *id;
293         QETH_DBF_TEXT(TRACE, 3, "L2prcvln");
294         spin_lock_bh(&card->vlanlock);
295         list_for_each_entry(id, &card->vid_list, list) {
296                 if (clear)
297                         qeth_l2_send_setdelvlan(card, id->vid,
298                                 IPA_CMD_DELVLAN);
299                 else
300                         qeth_l2_send_setdelvlan(card, id->vid,
301                                 IPA_CMD_SETVLAN);
302         }
303         spin_unlock_bh(&card->vlanlock);
304 }
305
306 static void qeth_l2_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
307 {
308         struct qeth_card *card = dev->ml_priv;
309         struct qeth_vlan_vid *id;
310
311         QETH_DBF_TEXT_(TRACE, 4, "aid:%d", vid);
312         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
313                 QETH_DBF_TEXT(TRACE, 3, "aidREC");
314                 return;
315         }
316         id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
317         if (id) {
318                 id->vid = vid;
319                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
320                 spin_lock_bh(&card->vlanlock);
321                 list_add_tail(&id->list, &card->vid_list);
322                 spin_unlock_bh(&card->vlanlock);
323         }
324 }
325
326 static void qeth_l2_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
327 {
328         struct qeth_vlan_vid *id, *tmpid = NULL;
329         struct qeth_card *card = dev->ml_priv;
330
331         QETH_DBF_TEXT_(TRACE, 4, "kid:%d", vid);
332         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
333                 QETH_DBF_TEXT(TRACE, 3, "kidREC");
334                 return;
335         }
336         spin_lock_bh(&card->vlanlock);
337         list_for_each_entry(id, &card->vid_list, list) {
338                 if (id->vid == vid) {
339                         list_del(&id->list);
340                         tmpid = id;
341                         break;
342                 }
343         }
344         spin_unlock_bh(&card->vlanlock);
345         if (tmpid) {
346                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
347                 kfree(tmpid);
348         }
349         qeth_l2_set_multicast_list(card->dev);
350 }
351
352 static int qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
353 {
354         int rc = 0;
355
356         QETH_DBF_TEXT(SETUP , 2, "stopcard");
357         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
358
359         qeth_set_allowed_threads(card, 0, 1);
360         if (card->read.state == CH_STATE_UP &&
361             card->write.state == CH_STATE_UP &&
362             (card->state == CARD_STATE_UP)) {
363                 if (recovery_mode &&
364                     card->info.type != QETH_CARD_TYPE_OSN) {
365                         qeth_l2_stop(card->dev);
366                 } else {
367                         rtnl_lock();
368                         dev_close(card->dev);
369                         rtnl_unlock();
370                 }
371                 if (!card->use_hard_stop ||
372                         recovery_mode) {
373                         __u8 *mac = &card->dev->dev_addr[0];
374                         rc = qeth_l2_send_delmac(card, mac);
375                         QETH_DBF_TEXT_(SETUP, 2, "Lerr%d", rc);
376                 }
377                 card->state = CARD_STATE_SOFTSETUP;
378         }
379         if (card->state == CARD_STATE_SOFTSETUP) {
380                 qeth_l2_process_vlans(card, 1);
381                 if (!card->use_hard_stop ||
382                         recovery_mode)
383                         qeth_l2_del_all_mc(card);
384                 qeth_clear_ipacmd_list(card);
385                 card->state = CARD_STATE_HARDSETUP;
386         }
387         if (card->state == CARD_STATE_HARDSETUP) {
388                 qeth_qdio_clear_card(card, 0);
389                 qeth_clear_qdio_buffers(card);
390                 qeth_clear_working_pool_list(card);
391                 card->state = CARD_STATE_DOWN;
392         }
393         if (card->state == CARD_STATE_DOWN) {
394                 qeth_clear_cmd_buffers(&card->read);
395                 qeth_clear_cmd_buffers(&card->write);
396         }
397         card->use_hard_stop = 0;
398         return rc;
399 }
400
401 static void qeth_l2_process_inbound_buffer(struct qeth_card *card,
402                             struct qeth_qdio_buffer *buf, int index)
403 {
404         struct qdio_buffer_element *element;
405         struct sk_buff *skb;
406         struct qeth_hdr *hdr;
407         int offset;
408         unsigned int len;
409
410         /* get first element of current buffer */
411         element = (struct qdio_buffer_element *)&buf->buffer->element[0];
412         offset = 0;
413         if (card->options.performance_stats)
414                 card->perf_stats.bufs_rec++;
415         while ((skb = qeth_core_get_next_skb(card, buf->buffer, &element,
416                                        &offset, &hdr))) {
417                 skb->dev = card->dev;
418                 /* is device UP ? */
419                 if (!(card->dev->flags & IFF_UP)) {
420                         dev_kfree_skb_any(skb);
421                         continue;
422                 }
423
424                 switch (hdr->hdr.l2.id) {
425                 case QETH_HEADER_TYPE_LAYER2:
426                         skb->pkt_type = PACKET_HOST;
427                         skb->protocol = eth_type_trans(skb, skb->dev);
428                         if (card->options.checksum_type == NO_CHECKSUMMING)
429                                 skb->ip_summed = CHECKSUM_UNNECESSARY;
430                         else
431                                 skb->ip_summed = CHECKSUM_NONE;
432                         if (skb->protocol == htons(ETH_P_802_2))
433                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
434                         len = skb->len;
435                         netif_rx(skb);
436                         break;
437                 case QETH_HEADER_TYPE_OSN:
438                         if (card->info.type == QETH_CARD_TYPE_OSN) {
439                                 skb_push(skb, sizeof(struct qeth_hdr));
440                                 skb_copy_to_linear_data(skb, hdr,
441                                                 sizeof(struct qeth_hdr));
442                                 len = skb->len;
443                                 card->osn_info.data_cb(skb);
444                                 break;
445                         }
446                         /* else unknown */
447                 default:
448                         dev_kfree_skb_any(skb);
449                         QETH_DBF_TEXT(TRACE, 3, "inbunkno");
450                         QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
451                         continue;
452                 }
453                 card->stats.rx_packets++;
454                 card->stats.rx_bytes += len;
455         }
456 }
457
458 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
459                            enum qeth_ipa_cmds ipacmd,
460                            int (*reply_cb) (struct qeth_card *,
461                                             struct qeth_reply*,
462                                             unsigned long))
463 {
464         struct qeth_ipa_cmd *cmd;
465         struct qeth_cmd_buffer *iob;
466
467         QETH_DBF_TEXT(TRACE, 2, "L2sdmac");
468         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
469         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
470         cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
471         memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
472         return qeth_send_ipa_cmd(card, iob, reply_cb, NULL);
473 }
474
475 static int qeth_l2_send_setmac_cb(struct qeth_card *card,
476                            struct qeth_reply *reply,
477                            unsigned long data)
478 {
479         struct qeth_ipa_cmd *cmd;
480
481         QETH_DBF_TEXT(TRACE, 2, "L2Smaccb");
482         cmd = (struct qeth_ipa_cmd *) data;
483         if (cmd->hdr.return_code) {
484                 QETH_DBF_TEXT_(TRACE, 2, "L2er%x", cmd->hdr.return_code);
485                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
486                 switch (cmd->hdr.return_code) {
487                 case IPA_RC_L2_DUP_MAC:
488                 case IPA_RC_L2_DUP_LAYER3_MAC:
489                         dev_warn(&card->gdev->dev,
490                                 "MAC address %pM already exists\n",
491                                 card->dev->dev_addr);
492                         break;
493                 case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
494                 case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
495                         dev_warn(&card->gdev->dev,
496                                 "MAC address %pM is not authorized\n",
497                                 card->dev->dev_addr);
498                         break;
499                 default:
500                         break;
501                 }
502                 cmd->hdr.return_code = -EIO;
503         } else {
504                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
505                 memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac,
506                        OSA_ADDR_LEN);
507                 dev_info(&card->gdev->dev,
508                         "MAC address %pM successfully registered on device %s\n",
509                         card->dev->dev_addr, card->dev->name);
510         }
511         return 0;
512 }
513
514 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
515 {
516         QETH_DBF_TEXT(TRACE, 2, "L2Setmac");
517         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
518                                           qeth_l2_send_setmac_cb);
519 }
520
521 static int qeth_l2_send_delmac_cb(struct qeth_card *card,
522                            struct qeth_reply *reply,
523                            unsigned long data)
524 {
525         struct qeth_ipa_cmd *cmd;
526
527         QETH_DBF_TEXT(TRACE, 2, "L2Dmaccb");
528         cmd = (struct qeth_ipa_cmd *) data;
529         if (cmd->hdr.return_code) {
530                 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
531                 cmd->hdr.return_code = -EIO;
532                 return 0;
533         }
534         card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
535
536         return 0;
537 }
538
539 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
540 {
541         QETH_DBF_TEXT(TRACE, 2, "L2Delmac");
542         if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
543                 return 0;
544         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC,
545                                           qeth_l2_send_delmac_cb);
546 }
547
548 static int qeth_l2_request_initial_mac(struct qeth_card *card)
549 {
550         int rc = 0;
551         char vendor_pre[] = {0x02, 0x00, 0x00};
552
553         QETH_DBF_TEXT(SETUP, 2, "doL2init");
554         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
555
556         rc = qeth_query_setadapterparms(card);
557         if (rc) {
558                 QETH_DBF_MESSAGE(2, "could not query adapter parameters on "
559                         "device %s: x%x\n", CARD_BUS_ID(card), rc);
560         }
561
562         if ((card->info.type == QETH_CARD_TYPE_IQD) || 
563             (card->info.guestlan)) {
564                 rc = qeth_setadpparms_change_macaddr(card);
565                 if (rc) {
566                         QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
567                                 "device %s: x%x\n", CARD_BUS_ID(card), rc);
568                         QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
569                         return rc;
570                 }
571                 QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN);
572         } else {
573                 random_ether_addr(card->dev->dev_addr);
574                 memcpy(card->dev->dev_addr, vendor_pre, 3);
575         }
576         return 0;
577 }
578
579 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
580 {
581         struct sockaddr *addr = p;
582         struct qeth_card *card = dev->ml_priv;
583         int rc = 0;
584
585         QETH_DBF_TEXT(TRACE, 3, "setmac");
586
587         if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
588                 QETH_DBF_TEXT(TRACE, 3, "setmcINV");
589                 return -EOPNOTSUPP;
590         }
591
592         if (card->info.type == QETH_CARD_TYPE_OSN) {
593                 QETH_DBF_TEXT(TRACE, 3, "setmcOSN");
594                 return -EOPNOTSUPP;
595         }
596         QETH_DBF_TEXT_(TRACE, 3, "%s", CARD_BUS_ID(card));
597         QETH_DBF_HEX(TRACE, 3, addr->sa_data, OSA_ADDR_LEN);
598         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
599                 QETH_DBF_TEXT(TRACE, 3, "setmcREC");
600                 return -ERESTARTSYS;
601         }
602         rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
603         if (!rc)
604                 rc = qeth_l2_send_setmac(card, addr->sa_data);
605         return rc;
606 }
607
608 static void qeth_l2_set_multicast_list(struct net_device *dev)
609 {
610         struct qeth_card *card = dev->ml_priv;
611         struct netdev_hw_addr *ha;
612
613         if (card->info.type == QETH_CARD_TYPE_OSN)
614                 return ;
615
616         QETH_DBF_TEXT(TRACE, 3, "setmulti");
617         if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
618             (card->state != CARD_STATE_UP))
619                 return;
620         qeth_l2_del_all_mc(card);
621         spin_lock_bh(&card->mclock);
622         netdev_for_each_mc_addr(ha, dev)
623                 qeth_l2_add_mc(card, ha->addr, 0);
624
625         netdev_for_each_uc_addr(ha, dev)
626                 qeth_l2_add_mc(card, ha->addr, 1);
627
628         spin_unlock_bh(&card->mclock);
629         if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
630                 return;
631         qeth_setadp_promisc_mode(card);
632 }
633
634 static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
635 {
636         int rc;
637         struct qeth_hdr *hdr = NULL;
638         int elements = 0;
639         struct qeth_card *card = dev->ml_priv;
640         struct sk_buff *new_skb = skb;
641         int ipv = qeth_get_ip_version(skb);
642         int cast_type = qeth_l2_get_cast_type(card, skb);
643         struct qeth_qdio_out_q *queue = card->qdio.out_qs
644                 [qeth_get_priority_queue(card, skb, ipv, cast_type)];
645         int tx_bytes = skb->len;
646         int data_offset = -1;
647         int elements_needed = 0;
648         int hd_len = 0;
649
650         if ((card->state != CARD_STATE_UP) || !card->lan_online) {
651                 card->stats.tx_carrier_errors++;
652                 goto tx_drop;
653         }
654
655         if ((card->info.type == QETH_CARD_TYPE_OSN) &&
656             (skb->protocol == htons(ETH_P_IPV6)))
657                 goto tx_drop;
658
659         if (card->options.performance_stats) {
660                 card->perf_stats.outbound_cnt++;
661                 card->perf_stats.outbound_start_time = qeth_get_micros();
662         }
663         netif_stop_queue(dev);
664
665         if (card->info.type == QETH_CARD_TYPE_OSN)
666                 hdr = (struct qeth_hdr *)skb->data;
667         else {
668                 if (card->info.type == QETH_CARD_TYPE_IQD) {
669                         new_skb = skb;
670                         data_offset = ETH_HLEN;
671                         hd_len = ETH_HLEN;
672                         hdr = kmem_cache_alloc(qeth_core_header_cache,
673                                                 GFP_ATOMIC);
674                         if (!hdr)
675                                 goto tx_drop;
676                         elements_needed++;
677                         skb_reset_mac_header(new_skb);
678                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
679                         hdr->hdr.l2.pkt_length = new_skb->len;
680                         memcpy(((char *)hdr) + sizeof(struct qeth_hdr),
681                                 skb_mac_header(new_skb), ETH_HLEN);
682                 } else {
683                         /* create a clone with writeable headroom */
684                         new_skb = skb_realloc_headroom(skb,
685                                                 sizeof(struct qeth_hdr));
686                         if (!new_skb)
687                                 goto tx_drop;
688                         hdr = (struct qeth_hdr *)skb_push(new_skb,
689                                                 sizeof(struct qeth_hdr));
690                         skb_set_mac_header(new_skb, sizeof(struct qeth_hdr));
691                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
692                 }
693         }
694
695         elements = qeth_get_elements_no(card, (void *)hdr, new_skb,
696                                                 elements_needed);
697         if (!elements) {
698                 if (data_offset >= 0)
699                         kmem_cache_free(qeth_core_header_cache, hdr);
700                 goto tx_drop;
701         }
702
703         if (card->info.type != QETH_CARD_TYPE_IQD)
704                 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
705                                          elements);
706         else
707                 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
708                                         elements, data_offset, hd_len);
709         if (!rc) {
710                 card->stats.tx_packets++;
711                 card->stats.tx_bytes += tx_bytes;
712                 if (new_skb != skb)
713                         dev_kfree_skb_any(skb);
714                 rc = NETDEV_TX_OK;
715         } else {
716                 if (data_offset >= 0)
717                         kmem_cache_free(qeth_core_header_cache, hdr);
718
719                 if (rc == -EBUSY) {
720                         if (new_skb != skb)
721                                 dev_kfree_skb_any(new_skb);
722                         return NETDEV_TX_BUSY;
723                 } else
724                         goto tx_drop;
725         }
726
727         netif_wake_queue(dev);
728         if (card->options.performance_stats)
729                 card->perf_stats.outbound_time += qeth_get_micros() -
730                         card->perf_stats.outbound_start_time;
731         return rc;
732
733 tx_drop:
734         card->stats.tx_dropped++;
735         card->stats.tx_errors++;
736         if ((new_skb != skb) && new_skb)
737                 dev_kfree_skb_any(new_skb);
738         dev_kfree_skb_any(skb);
739         netif_wake_queue(dev);
740         return NETDEV_TX_OK;
741 }
742
743 static void qeth_l2_qdio_input_handler(struct ccw_device *ccwdev,
744                         unsigned int qdio_err, unsigned int queue,
745                         int first_element, int count, unsigned long card_ptr)
746 {
747         struct net_device *net_dev;
748         struct qeth_card *card;
749         struct qeth_qdio_buffer *buffer;
750         int index;
751         int i;
752
753         card = (struct qeth_card *) card_ptr;
754         net_dev = card->dev;
755         if (card->options.performance_stats) {
756                 card->perf_stats.inbound_cnt++;
757                 card->perf_stats.inbound_start_time = qeth_get_micros();
758         }
759         if (qdio_err & QDIO_ERROR_ACTIVATE_CHECK_CONDITION) {
760                 QETH_DBF_TEXT(TRACE, 1, "qdinchk");
761                 QETH_DBF_TEXT_(TRACE, 1, "%s", CARD_BUS_ID(card));
762                 QETH_DBF_TEXT_(TRACE, 1, "%04X%04X", first_element,
763                                 count);
764                 QETH_DBF_TEXT_(TRACE, 1, "%04X", queue);
765                 qeth_schedule_recovery(card);
766                 return;
767         }
768         for (i = first_element; i < (first_element + count); ++i) {
769                 index = i % QDIO_MAX_BUFFERS_PER_Q;
770                 buffer = &card->qdio.in_q->bufs[index];
771                 if (!(qdio_err &&
772                       qeth_check_qdio_errors(card, buffer->buffer, qdio_err,
773                                              "qinerr")))
774                         qeth_l2_process_inbound_buffer(card, buffer, index);
775                 /* clear buffer and give back to hardware */
776                 qeth_put_buffer_pool_entry(card, buffer->pool_entry);
777                 qeth_queue_input_buffer(card, index);
778         }
779         if (card->options.performance_stats)
780                 card->perf_stats.inbound_time += qeth_get_micros() -
781                         card->perf_stats.inbound_start_time;
782 }
783
784 static int qeth_l2_open(struct net_device *dev)
785 {
786         struct qeth_card *card = dev->ml_priv;
787
788         QETH_DBF_TEXT(TRACE, 4, "qethopen");
789         if (card->state != CARD_STATE_SOFTSETUP)
790                 return -ENODEV;
791
792         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
793              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
794                 QETH_DBF_TEXT(TRACE, 4, "nomacadr");
795                 return -EPERM;
796         }
797         card->data.state = CH_STATE_UP;
798         card->state = CARD_STATE_UP;
799         netif_start_queue(dev);
800
801         if (!card->lan_online && netif_carrier_ok(dev))
802                 netif_carrier_off(dev);
803         return 0;
804 }
805
806
807 static int qeth_l2_stop(struct net_device *dev)
808 {
809         struct qeth_card *card = dev->ml_priv;
810
811         QETH_DBF_TEXT(TRACE, 4, "qethstop");
812         netif_tx_disable(dev);
813         if (card->state == CARD_STATE_UP)
814                 card->state = CARD_STATE_SOFTSETUP;
815         return 0;
816 }
817
818 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
819 {
820         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
821
822         INIT_LIST_HEAD(&card->vid_list);
823         INIT_LIST_HEAD(&card->mc_list);
824         card->options.layer2 = 1;
825         card->discipline.input_handler = (qdio_handler_t *)
826                 qeth_l2_qdio_input_handler;
827         card->discipline.output_handler = (qdio_handler_t *)
828                 qeth_qdio_output_handler;
829         card->discipline.recover = qeth_l2_recover;
830         return 0;
831 }
832
833 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
834 {
835         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
836
837         qeth_set_allowed_threads(card, 0, 1);
838         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
839
840         if (cgdev->state == CCWGROUP_ONLINE) {
841                 card->use_hard_stop = 1;
842                 qeth_l2_set_offline(cgdev);
843         }
844
845         if (card->dev) {
846                 unregister_netdev(card->dev);
847                 card->dev = NULL;
848         }
849
850         qeth_l2_del_all_mc(card);
851         return;
852 }
853
854 static const struct ethtool_ops qeth_l2_ethtool_ops = {
855         .get_link = ethtool_op_get_link,
856         .get_strings = qeth_core_get_strings,
857         .get_ethtool_stats = qeth_core_get_ethtool_stats,
858         .get_sset_count = qeth_core_get_sset_count,
859         .get_drvinfo = qeth_core_get_drvinfo,
860         .get_settings = qeth_core_ethtool_get_settings,
861 };
862
863 static const struct ethtool_ops qeth_l2_osn_ops = {
864         .get_strings = qeth_core_get_strings,
865         .get_ethtool_stats = qeth_core_get_ethtool_stats,
866         .get_sset_count = qeth_core_get_sset_count,
867         .get_drvinfo = qeth_core_get_drvinfo,
868 };
869
870 static const struct net_device_ops qeth_l2_netdev_ops = {
871         .ndo_open               = qeth_l2_open,
872         .ndo_stop               = qeth_l2_stop,
873         .ndo_get_stats          = qeth_get_stats,
874         .ndo_start_xmit         = qeth_l2_hard_start_xmit,
875         .ndo_validate_addr      = eth_validate_addr,
876         .ndo_set_multicast_list = qeth_l2_set_multicast_list,
877         .ndo_do_ioctl           = qeth_l2_do_ioctl,
878         .ndo_set_mac_address    = qeth_l2_set_mac_address,
879         .ndo_change_mtu         = qeth_change_mtu,
880         .ndo_vlan_rx_add_vid    = qeth_l2_vlan_rx_add_vid,
881         .ndo_vlan_rx_kill_vid   = qeth_l2_vlan_rx_kill_vid,
882         .ndo_tx_timeout         = qeth_tx_timeout,
883 };
884
885 static int qeth_l2_setup_netdev(struct qeth_card *card)
886 {
887         switch (card->info.type) {
888         case QETH_CARD_TYPE_OSAE:
889                 card->dev = alloc_etherdev(0);
890                 break;
891         case QETH_CARD_TYPE_IQD:
892                 card->dev = alloc_netdev(0, "hsi%d", ether_setup);
893                 break;
894         case QETH_CARD_TYPE_OSN:
895                 card->dev = alloc_netdev(0, "osn%d", ether_setup);
896                 card->dev->flags |= IFF_NOARP;
897                 break;
898         default:
899                 card->dev = alloc_etherdev(0);
900         }
901
902         if (!card->dev)
903                 return -ENODEV;
904
905         card->dev->ml_priv = card;
906         card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
907         card->dev->mtu = card->info.initial_mtu;
908         card->dev->netdev_ops = &qeth_l2_netdev_ops;
909         if (card->info.type != QETH_CARD_TYPE_OSN)
910                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_ethtool_ops);
911         else
912                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_osn_ops);
913         card->dev->features |= NETIF_F_HW_VLAN_FILTER;
914         card->info.broadcast_capable = 1;
915         qeth_l2_request_initial_mac(card);
916         SET_NETDEV_DEV(card->dev, &card->gdev->dev);
917         return register_netdev(card->dev);
918 }
919
920 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
921 {
922         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
923         int rc = 0;
924         enum qeth_card_states recover_flag;
925
926         BUG_ON(!card);
927         QETH_DBF_TEXT(SETUP, 2, "setonlin");
928         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
929
930         recover_flag = card->state;
931         rc = qeth_core_hardsetup_card(card);
932         if (rc) {
933                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
934                 rc = -ENODEV;
935                 goto out_remove;
936         }
937
938         if (!card->dev && qeth_l2_setup_netdev(card)) {
939                 rc = -ENODEV;
940                 goto out_remove;
941         }
942
943         if (card->info.type != QETH_CARD_TYPE_OSN)
944                 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
945
946         card->state = CARD_STATE_HARDSETUP;
947         qeth_print_status_message(card);
948
949         /* softsetup */
950         QETH_DBF_TEXT(SETUP, 2, "softsetp");
951
952         rc = qeth_send_startlan(card);
953         if (rc) {
954                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
955                 if (rc == 0xe080) {
956                         dev_warn(&card->gdev->dev,
957                                 "The LAN is offline\n");
958                         card->lan_online = 0;
959                         return 0;
960                 }
961                 rc = -ENODEV;
962                 goto out_remove;
963         } else
964                 card->lan_online = 1;
965
966         if (card->info.type != QETH_CARD_TYPE_OSN) {
967                 /* configure isolation level */
968                 qeth_set_access_ctrl_online(card);
969                 qeth_l2_process_vlans(card, 0);
970         }
971
972         netif_tx_disable(card->dev);
973
974         rc = qeth_init_qdio_queues(card);
975         if (rc) {
976                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
977                 rc = -ENODEV;
978                 goto out_remove;
979         }
980         card->state = CARD_STATE_SOFTSETUP;
981         netif_carrier_on(card->dev);
982
983         qeth_set_allowed_threads(card, 0xffffffff, 0);
984         if (recover_flag == CARD_STATE_RECOVER) {
985                 if (recovery_mode &&
986                     card->info.type != QETH_CARD_TYPE_OSN) {
987                         qeth_l2_open(card->dev);
988                 } else {
989                         rtnl_lock();
990                         dev_open(card->dev);
991                         rtnl_unlock();
992                 }
993                 /* this also sets saved unicast addresses */
994                 qeth_l2_set_multicast_list(card->dev);
995         }
996         /* let user_space know that device is online */
997         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
998         return 0;
999
1000 out_remove:
1001         card->use_hard_stop = 1;
1002         qeth_l2_stop_card(card, 0);
1003         ccw_device_set_offline(CARD_DDEV(card));
1004         ccw_device_set_offline(CARD_WDEV(card));
1005         ccw_device_set_offline(CARD_RDEV(card));
1006         if (recover_flag == CARD_STATE_RECOVER)
1007                 card->state = CARD_STATE_RECOVER;
1008         else
1009                 card->state = CARD_STATE_DOWN;
1010         return rc;
1011 }
1012
1013 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1014 {
1015         return __qeth_l2_set_online(gdev, 0);
1016 }
1017
1018 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1019                                         int recovery_mode)
1020 {
1021         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1022         int rc = 0, rc2 = 0, rc3 = 0;
1023         enum qeth_card_states recover_flag;
1024
1025         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1026         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1027
1028         if (card->dev && netif_carrier_ok(card->dev))
1029                 netif_carrier_off(card->dev);
1030         recover_flag = card->state;
1031         qeth_l2_stop_card(card, recovery_mode);
1032         rc  = ccw_device_set_offline(CARD_DDEV(card));
1033         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1034         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1035         if (!rc)
1036                 rc = (rc2) ? rc2 : rc3;
1037         if (rc)
1038                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1039         if (recover_flag == CARD_STATE_UP)
1040                 card->state = CARD_STATE_RECOVER;
1041         /* let user_space know that device is offline */
1042         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1043         return 0;
1044 }
1045
1046 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1047 {
1048         return __qeth_l2_set_offline(cgdev, 0);
1049 }
1050
1051 static int qeth_l2_recover(void *ptr)
1052 {
1053         struct qeth_card *card;
1054         int rc = 0;
1055
1056         card = (struct qeth_card *) ptr;
1057         QETH_DBF_TEXT(TRACE, 2, "recover1");
1058         QETH_DBF_HEX(TRACE, 2, &card, sizeof(void *));
1059         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1060                 return 0;
1061         QETH_DBF_TEXT(TRACE, 2, "recover2");
1062         dev_warn(&card->gdev->dev,
1063                 "A recovery process has been started for the device\n");
1064         card->use_hard_stop = 1;
1065         __qeth_l2_set_offline(card->gdev, 1);
1066         rc = __qeth_l2_set_online(card->gdev, 1);
1067         /* don't run another scheduled recovery */
1068         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1069         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1070         if (!rc)
1071                 dev_info(&card->gdev->dev,
1072                         "Device successfully recovered!\n");
1073         else {
1074                 rtnl_lock();
1075                 dev_close(card->dev);
1076                 rtnl_unlock();
1077                 dev_warn(&card->gdev->dev, "The qeth device driver "
1078                         "failed to recover an error on the device\n");
1079         }
1080         return 0;
1081 }
1082
1083 static int __init qeth_l2_init(void)
1084 {
1085         pr_info("register layer 2 discipline\n");
1086         return 0;
1087 }
1088
1089 static void __exit qeth_l2_exit(void)
1090 {
1091         pr_info("unregister layer 2 discipline\n");
1092 }
1093
1094 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1095 {
1096         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1097         qeth_qdio_clear_card(card, 0);
1098         qeth_clear_qdio_buffers(card);
1099 }
1100
1101 static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev)
1102 {
1103         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1104
1105         if (card->dev)
1106                 netif_device_detach(card->dev);
1107         qeth_set_allowed_threads(card, 0, 1);
1108         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1109         if (gdev->state == CCWGROUP_OFFLINE)
1110                 return 0;
1111         if (card->state == CARD_STATE_UP) {
1112                 card->use_hard_stop = 1;
1113                 __qeth_l2_set_offline(card->gdev, 1);
1114         } else
1115                 __qeth_l2_set_offline(card->gdev, 0);
1116         return 0;
1117 }
1118
1119 static int qeth_l2_pm_resume(struct ccwgroup_device *gdev)
1120 {
1121         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1122         int rc = 0;
1123
1124         if (gdev->state == CCWGROUP_OFFLINE)
1125                 goto out;
1126
1127         if (card->state == CARD_STATE_RECOVER) {
1128                 rc = __qeth_l2_set_online(card->gdev, 1);
1129                 if (rc) {
1130                         rtnl_lock();
1131                         dev_close(card->dev);
1132                         rtnl_unlock();
1133                 }
1134         } else
1135                 rc = __qeth_l2_set_online(card->gdev, 0);
1136 out:
1137         qeth_set_allowed_threads(card, 0xffffffff, 0);
1138         if (card->dev)
1139                 netif_device_attach(card->dev);
1140         if (rc)
1141                 dev_warn(&card->gdev->dev, "The qeth device driver "
1142                         "failed to recover an error on the device\n");
1143         return rc;
1144 }
1145
1146 struct ccwgroup_driver qeth_l2_ccwgroup_driver = {
1147         .probe = qeth_l2_probe_device,
1148         .remove = qeth_l2_remove_device,
1149         .set_online = qeth_l2_set_online,
1150         .set_offline = qeth_l2_set_offline,
1151         .shutdown = qeth_l2_shutdown,
1152         .freeze = qeth_l2_pm_suspend,
1153         .thaw = qeth_l2_pm_resume,
1154         .restore = qeth_l2_pm_resume,
1155 };
1156 EXPORT_SYMBOL_GPL(qeth_l2_ccwgroup_driver);
1157
1158 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1159                            struct qeth_cmd_buffer *iob)
1160 {
1161         unsigned long flags;
1162         int rc = 0;
1163
1164         QETH_DBF_TEXT(TRACE, 5, "osndctrd");
1165
1166         wait_event(card->wait_q,
1167                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1168         qeth_prepare_control_data(card, len, iob);
1169         QETH_DBF_TEXT(TRACE, 6, "osnoirqp");
1170         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1171         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1172                               (addr_t) iob, 0, 0);
1173         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1174         if (rc) {
1175                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1176                            "ccw_device_start rc = %i\n", rc);
1177                 QETH_DBF_TEXT_(TRACE, 2, " err%d", rc);
1178                 qeth_release_buffer(iob->channel, iob);
1179                 atomic_set(&card->write.irq_pending, 0);
1180                 wake_up(&card->wait_q);
1181         }
1182         return rc;
1183 }
1184
1185 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1186                         struct qeth_cmd_buffer *iob, int data_len)
1187 {
1188         u16 s1, s2;
1189
1190         QETH_DBF_TEXT(TRACE, 4, "osndipa");
1191
1192         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1193         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1194         s2 = (u16)data_len;
1195         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1196         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1197         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1198         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1199         return qeth_osn_send_control_data(card, s1, iob);
1200 }
1201
1202 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1203 {
1204         struct qeth_cmd_buffer *iob;
1205         struct qeth_card *card;
1206         int rc;
1207
1208         QETH_DBF_TEXT(TRACE, 2, "osnsdmc");
1209         if (!dev)
1210                 return -ENODEV;
1211         card = dev->ml_priv;
1212         if (!card)
1213                 return -ENODEV;
1214         if ((card->state != CARD_STATE_UP) &&
1215             (card->state != CARD_STATE_SOFTSETUP))
1216                 return -ENODEV;
1217         iob = qeth_wait_for_buffer(&card->write);
1218         memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1219         rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1220         return rc;
1221 }
1222 EXPORT_SYMBOL(qeth_osn_assist);
1223
1224 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1225                   int (*assist_cb)(struct net_device *, void *),
1226                   int (*data_cb)(struct sk_buff *))
1227 {
1228         struct qeth_card *card;
1229
1230         QETH_DBF_TEXT(TRACE, 2, "osnreg");
1231         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1232         if (*dev == NULL)
1233                 return -ENODEV;
1234         card = (*dev)->ml_priv;
1235         if (!card)
1236                 return -ENODEV;
1237         if ((assist_cb == NULL) || (data_cb == NULL))
1238                 return -EINVAL;
1239         card->osn_info.assist_cb = assist_cb;
1240         card->osn_info.data_cb = data_cb;
1241         return 0;
1242 }
1243 EXPORT_SYMBOL(qeth_osn_register);
1244
1245 void qeth_osn_deregister(struct net_device *dev)
1246 {
1247         struct qeth_card *card;
1248
1249         QETH_DBF_TEXT(TRACE, 2, "osndereg");
1250         if (!dev)
1251                 return;
1252         card = dev->ml_priv;
1253         if (!card)
1254                 return;
1255         card->osn_info.assist_cb = NULL;
1256         card->osn_info.data_cb = NULL;
1257         return;
1258 }
1259 EXPORT_SYMBOL(qeth_osn_deregister);
1260
1261 module_init(qeth_l2_init);
1262 module_exit(qeth_l2_exit);
1263 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1264 MODULE_DESCRIPTION("qeth layer 2 discipline");
1265 MODULE_LICENSE("GPL");