net: use helpers to access uc list V2
[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/etherdevice.h>
20 #include <linux/mii.h>
21 #include <linux/ip.h>
22 #include <linux/list.h>
23
24 #include "qeth_core.h"
25
26 static int qeth_l2_set_offline(struct ccwgroup_device *);
27 static int qeth_l2_stop(struct net_device *);
28 static int qeth_l2_send_delmac(struct qeth_card *, __u8 *);
29 static int qeth_l2_send_setdelmac(struct qeth_card *, __u8 *,
30                            enum qeth_ipa_cmds,
31                            int (*reply_cb) (struct qeth_card *,
32                                             struct qeth_reply*,
33                                             unsigned long));
34 static void qeth_l2_set_multicast_list(struct net_device *);
35 static int qeth_l2_recover(void *);
36
37 static int qeth_l2_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
38 {
39         struct qeth_card *card = dev->ml_priv;
40         struct mii_ioctl_data *mii_data;
41         int rc = 0;
42
43         if (!card)
44                 return -ENODEV;
45
46         if ((card->state != CARD_STATE_UP) &&
47                 (card->state != CARD_STATE_SOFTSETUP))
48                 return -ENODEV;
49
50         if (card->info.type == QETH_CARD_TYPE_OSN)
51                 return -EPERM;
52
53         switch (cmd) {
54         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
55                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
56                 break;
57         case SIOC_QETH_GET_CARD_TYPE:
58                 if ((card->info.type == QETH_CARD_TYPE_OSAE) &&
59                     !card->info.guestlan)
60                         return 1;
61                 return 0;
62                 break;
63         case SIOCGMIIPHY:
64                 mii_data = if_mii(rq);
65                 mii_data->phy_id = 0;
66                 break;
67         case SIOCGMIIREG:
68                 mii_data = if_mii(rq);
69                 if (mii_data->phy_id != 0)
70                         rc = -EINVAL;
71                 else
72                         mii_data->val_out = qeth_mdio_read(dev,
73                                 mii_data->phy_id, mii_data->reg_num);
74                 break;
75         default:
76                 rc = -EOPNOTSUPP;
77         }
78         if (rc)
79                 QETH_DBF_TEXT_(TRACE, 2, "ioce%d", rc);
80         return rc;
81 }
82
83 static int qeth_l2_verify_dev(struct net_device *dev)
84 {
85         struct qeth_card *card;
86         unsigned long flags;
87         int rc = 0;
88
89         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
90         list_for_each_entry(card, &qeth_core_card_list.list, list) {
91                 if (card->dev == dev) {
92                         rc = QETH_REAL_CARD;
93                         break;
94                 }
95         }
96         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
97
98         return rc;
99 }
100
101 static struct net_device *qeth_l2_netdev_by_devno(unsigned char *read_dev_no)
102 {
103         struct qeth_card *card;
104         struct net_device *ndev;
105         __u16 temp_dev_no;
106         unsigned long flags;
107         struct ccw_dev_id read_devid;
108
109         ndev = NULL;
110         memcpy(&temp_dev_no, read_dev_no, 2);
111         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
112         list_for_each_entry(card, &qeth_core_card_list.list, list) {
113                 ccw_device_get_id(CARD_RDEV(card), &read_devid);
114                 if (read_devid.devno == temp_dev_no) {
115                         ndev = card->dev;
116                         break;
117                 }
118         }
119         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
120         return ndev;
121 }
122
123 static int qeth_l2_send_setgroupmac_cb(struct qeth_card *card,
124                                 struct qeth_reply *reply,
125                                 unsigned long data)
126 {
127         struct qeth_ipa_cmd *cmd;
128         __u8 *mac;
129
130         QETH_DBF_TEXT(TRACE, 2, "L2Sgmacb");
131         cmd = (struct qeth_ipa_cmd *) data;
132         mac = &cmd->data.setdelmac.mac[0];
133         /* MAC already registered, needed in couple/uncouple case */
134         if (cmd->hdr.return_code ==  IPA_RC_L2_DUP_MAC) {
135                 QETH_DBF_MESSAGE(2, "Group MAC %pM already existing on %s \n",
136                           mac, QETH_CARD_IFNAME(card));
137                 cmd->hdr.return_code = 0;
138         }
139         if (cmd->hdr.return_code)
140                 QETH_DBF_MESSAGE(2, "Could not set group MAC %pM on %s: %x\n",
141                           mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code);
142         return 0;
143 }
144
145 static int qeth_l2_send_setgroupmac(struct qeth_card *card, __u8 *mac)
146 {
147         QETH_DBF_TEXT(TRACE, 2, "L2Sgmac");
148         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETGMAC,
149                                           qeth_l2_send_setgroupmac_cb);
150 }
151
152 static int qeth_l2_send_delgroupmac_cb(struct qeth_card *card,
153                                 struct qeth_reply *reply,
154                                 unsigned long data)
155 {
156         struct qeth_ipa_cmd *cmd;
157         __u8 *mac;
158
159         QETH_DBF_TEXT(TRACE, 2, "L2Dgmacb");
160         cmd = (struct qeth_ipa_cmd *) data;
161         mac = &cmd->data.setdelmac.mac[0];
162         if (cmd->hdr.return_code)
163                 QETH_DBF_MESSAGE(2, "Could not delete group MAC %pM on %s: %x\n",
164                           mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code);
165         return 0;
166 }
167
168 static int qeth_l2_send_delgroupmac(struct qeth_card *card, __u8 *mac)
169 {
170         QETH_DBF_TEXT(TRACE, 2, "L2Dgmac");
171         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELGMAC,
172                                           qeth_l2_send_delgroupmac_cb);
173 }
174
175 static void qeth_l2_add_mc(struct qeth_card *card, __u8 *mac, int vmac)
176 {
177         struct qeth_mc_mac *mc;
178         int rc;
179
180         mc = kmalloc(sizeof(struct qeth_mc_mac), GFP_ATOMIC);
181
182         if (!mc)
183                 return;
184
185         memcpy(mc->mc_addr, mac, OSA_ADDR_LEN);
186         mc->mc_addrlen = OSA_ADDR_LEN;
187         mc->is_vmac = vmac;
188
189         if (vmac) {
190                 rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
191                                         NULL);
192         } else {
193                 rc = qeth_l2_send_setgroupmac(card, mac);
194         }
195
196         if (!rc)
197                 list_add_tail(&mc->list, &card->mc_list);
198         else
199                 kfree(mc);
200 }
201
202 static void qeth_l2_del_all_mc(struct qeth_card *card)
203 {
204         struct qeth_mc_mac *mc, *tmp;
205
206         spin_lock_bh(&card->mclock);
207         list_for_each_entry_safe(mc, tmp, &card->mc_list, list) {
208                 if (mc->is_vmac)
209                         qeth_l2_send_setdelmac(card, mc->mc_addr,
210                                         IPA_CMD_DELVMAC, NULL);
211                 else
212                         qeth_l2_send_delgroupmac(card, mc->mc_addr);
213                 list_del(&mc->list);
214                 kfree(mc);
215         }
216         spin_unlock_bh(&card->mclock);
217 }
218
219 static inline int qeth_l2_get_cast_type(struct qeth_card *card,
220                         struct sk_buff *skb)
221 {
222         if (card->info.type == QETH_CARD_TYPE_OSN)
223                 return RTN_UNSPEC;
224         if (is_broadcast_ether_addr(skb->data))
225                 return RTN_BROADCAST;
226         if (is_multicast_ether_addr(skb->data))
227                 return RTN_MULTICAST;
228         return RTN_UNSPEC;
229 }
230
231 static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
232                         struct sk_buff *skb, int ipv, int cast_type)
233 {
234         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
235
236         memset(hdr, 0, sizeof(struct qeth_hdr));
237         hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
238
239         /* set byte byte 3 to casting flags */
240         if (cast_type == RTN_MULTICAST)
241                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
242         else if (cast_type == RTN_BROADCAST)
243                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
244         else
245                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
246
247         hdr->hdr.l2.pkt_length = skb->len-QETH_HEADER_SIZE;
248         /* VSWITCH relies on the VLAN
249          * information to be present in
250          * the QDIO header */
251         if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
252                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
253                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
254         }
255 }
256
257 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
258                         struct qeth_reply *reply, unsigned long data)
259 {
260         struct qeth_ipa_cmd *cmd;
261
262         QETH_DBF_TEXT(TRACE, 2, "L2sdvcb");
263         cmd = (struct qeth_ipa_cmd *) data;
264         if (cmd->hdr.return_code) {
265                 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x. "
266                           "Continuing\n", cmd->data.setdelvlan.vlan_id,
267                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
268                 QETH_DBF_TEXT_(TRACE, 2, "L2VL%4x", cmd->hdr.command);
269                 QETH_DBF_TEXT_(TRACE, 2, "L2%s", CARD_BUS_ID(card));
270                 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
271         }
272         return 0;
273 }
274
275 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
276                                 enum qeth_ipa_cmds ipacmd)
277 {
278         struct qeth_ipa_cmd *cmd;
279         struct qeth_cmd_buffer *iob;
280
281         QETH_DBF_TEXT_(TRACE, 4, "L2sdv%x", ipacmd);
282         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
283         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
284         cmd->data.setdelvlan.vlan_id = i;
285         return qeth_send_ipa_cmd(card, iob,
286                                  qeth_l2_send_setdelvlan_cb, NULL);
287 }
288
289 static void qeth_l2_process_vlans(struct qeth_card *card, int clear)
290 {
291         struct qeth_vlan_vid *id;
292         QETH_DBF_TEXT(TRACE, 3, "L2prcvln");
293         spin_lock_bh(&card->vlanlock);
294         list_for_each_entry(id, &card->vid_list, list) {
295                 if (clear)
296                         qeth_l2_send_setdelvlan(card, id->vid,
297                                 IPA_CMD_DELVLAN);
298                 else
299                         qeth_l2_send_setdelvlan(card, id->vid,
300                                 IPA_CMD_SETVLAN);
301         }
302         spin_unlock_bh(&card->vlanlock);
303 }
304
305 static void qeth_l2_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
306 {
307         struct qeth_card *card = dev->ml_priv;
308         struct qeth_vlan_vid *id;
309
310         QETH_DBF_TEXT_(TRACE, 4, "aid:%d", vid);
311         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
312                 QETH_DBF_TEXT(TRACE, 3, "aidREC");
313                 return;
314         }
315         id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
316         if (id) {
317                 id->vid = vid;
318                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
319                 spin_lock_bh(&card->vlanlock);
320                 list_add_tail(&id->list, &card->vid_list);
321                 spin_unlock_bh(&card->vlanlock);
322         }
323 }
324
325 static void qeth_l2_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
326 {
327         struct qeth_vlan_vid *id, *tmpid = NULL;
328         struct qeth_card *card = dev->ml_priv;
329
330         QETH_DBF_TEXT_(TRACE, 4, "kid:%d", vid);
331         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
332                 QETH_DBF_TEXT(TRACE, 3, "kidREC");
333                 return;
334         }
335         spin_lock_bh(&card->vlanlock);
336         list_for_each_entry(id, &card->vid_list, list) {
337                 if (id->vid == vid) {
338                         list_del(&id->list);
339                         tmpid = id;
340                         break;
341                 }
342         }
343         spin_unlock_bh(&card->vlanlock);
344         if (tmpid) {
345                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
346                 kfree(tmpid);
347         }
348         qeth_l2_set_multicast_list(card->dev);
349 }
350
351 static int qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
352 {
353         int rc = 0;
354
355         QETH_DBF_TEXT(SETUP , 2, "stopcard");
356         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
357
358         qeth_set_allowed_threads(card, 0, 1);
359         if (card->read.state == CH_STATE_UP &&
360             card->write.state == CH_STATE_UP &&
361             (card->state == CARD_STATE_UP)) {
362                 if (recovery_mode &&
363                     card->info.type != QETH_CARD_TYPE_OSN) {
364                         qeth_l2_stop(card->dev);
365                 } else {
366                         rtnl_lock();
367                         dev_close(card->dev);
368                         rtnl_unlock();
369                 }
370                 if (!card->use_hard_stop ||
371                         recovery_mode) {
372                         __u8 *mac = &card->dev->dev_addr[0];
373                         rc = qeth_l2_send_delmac(card, mac);
374                         QETH_DBF_TEXT_(SETUP, 2, "Lerr%d", rc);
375                 }
376                 card->state = CARD_STATE_SOFTSETUP;
377         }
378         if (card->state == CARD_STATE_SOFTSETUP) {
379                 qeth_l2_process_vlans(card, 1);
380                 if (!card->use_hard_stop ||
381                         recovery_mode)
382                         qeth_l2_del_all_mc(card);
383                 qeth_clear_ipacmd_list(card);
384                 card->state = CARD_STATE_HARDSETUP;
385         }
386         if (card->state == CARD_STATE_HARDSETUP) {
387                 qeth_qdio_clear_card(card, 0);
388                 qeth_clear_qdio_buffers(card);
389                 qeth_clear_working_pool_list(card);
390                 card->state = CARD_STATE_DOWN;
391         }
392         if (card->state == CARD_STATE_DOWN) {
393                 qeth_clear_cmd_buffers(&card->read);
394                 qeth_clear_cmd_buffers(&card->write);
395         }
396         card->use_hard_stop = 0;
397         return rc;
398 }
399
400 static void qeth_l2_process_inbound_buffer(struct qeth_card *card,
401                             struct qeth_qdio_buffer *buf, int index)
402 {
403         struct qdio_buffer_element *element;
404         struct sk_buff *skb;
405         struct qeth_hdr *hdr;
406         int offset;
407         unsigned int len;
408
409         /* get first element of current buffer */
410         element = (struct qdio_buffer_element *)&buf->buffer->element[0];
411         offset = 0;
412         if (card->options.performance_stats)
413                 card->perf_stats.bufs_rec++;
414         while ((skb = qeth_core_get_next_skb(card, buf->buffer, &element,
415                                        &offset, &hdr))) {
416                 skb->dev = card->dev;
417                 /* is device UP ? */
418                 if (!(card->dev->flags & IFF_UP)) {
419                         dev_kfree_skb_any(skb);
420                         continue;
421                 }
422
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                         if (card->options.checksum_type == NO_CHECKSUMMING)
428                                 skb->ip_summed = CHECKSUM_UNNECESSARY;
429                         else
430                                 skb->ip_summed = CHECKSUM_NONE;
431                         if (skb->protocol == htons(ETH_P_802_2))
432                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
433                         len = skb->len;
434                         netif_rx(skb);
435                         break;
436                 case QETH_HEADER_TYPE_OSN:
437                         if (card->info.type == QETH_CARD_TYPE_OSN) {
438                                 skb_push(skb, sizeof(struct qeth_hdr));
439                                 skb_copy_to_linear_data(skb, hdr,
440                                                 sizeof(struct qeth_hdr));
441                                 len = skb->len;
442                                 card->osn_info.data_cb(skb);
443                                 break;
444                         }
445                         /* else unknown */
446                 default:
447                         dev_kfree_skb_any(skb);
448                         QETH_DBF_TEXT(TRACE, 3, "inbunkno");
449                         QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
450                         continue;
451                 }
452                 card->stats.rx_packets++;
453                 card->stats.rx_bytes += len;
454         }
455 }
456
457 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
458                            enum qeth_ipa_cmds ipacmd,
459                            int (*reply_cb) (struct qeth_card *,
460                                             struct qeth_reply*,
461                                             unsigned long))
462 {
463         struct qeth_ipa_cmd *cmd;
464         struct qeth_cmd_buffer *iob;
465
466         QETH_DBF_TEXT(TRACE, 2, "L2sdmac");
467         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
468         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
469         cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
470         memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
471         return qeth_send_ipa_cmd(card, iob, reply_cb, NULL);
472 }
473
474 static int qeth_l2_send_setmac_cb(struct qeth_card *card,
475                            struct qeth_reply *reply,
476                            unsigned long data)
477 {
478         struct qeth_ipa_cmd *cmd;
479
480         QETH_DBF_TEXT(TRACE, 2, "L2Smaccb");
481         cmd = (struct qeth_ipa_cmd *) data;
482         if (cmd->hdr.return_code) {
483                 QETH_DBF_TEXT_(TRACE, 2, "L2er%x", cmd->hdr.return_code);
484                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
485                 switch (cmd->hdr.return_code) {
486                 case IPA_RC_L2_DUP_MAC:
487                 case IPA_RC_L2_DUP_LAYER3_MAC:
488                         dev_warn(&card->gdev->dev,
489                                 "MAC address %pM already exists\n",
490                                 card->dev->dev_addr);
491                         break;
492                 case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
493                 case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
494                         dev_warn(&card->gdev->dev,
495                                 "MAC address %pM is not authorized\n",
496                                 card->dev->dev_addr);
497                         break;
498                 default:
499                         break;
500                 }
501                 cmd->hdr.return_code = -EIO;
502         } else {
503                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
504                 memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac,
505                        OSA_ADDR_LEN);
506                 dev_info(&card->gdev->dev,
507                         "MAC address %pM successfully registered on device %s\n",
508                         card->dev->dev_addr, card->dev->name);
509         }
510         return 0;
511 }
512
513 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
514 {
515         QETH_DBF_TEXT(TRACE, 2, "L2Setmac");
516         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
517                                           qeth_l2_send_setmac_cb);
518 }
519
520 static int qeth_l2_send_delmac_cb(struct qeth_card *card,
521                            struct qeth_reply *reply,
522                            unsigned long data)
523 {
524         struct qeth_ipa_cmd *cmd;
525
526         QETH_DBF_TEXT(TRACE, 2, "L2Dmaccb");
527         cmd = (struct qeth_ipa_cmd *) data;
528         if (cmd->hdr.return_code) {
529                 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
530                 cmd->hdr.return_code = -EIO;
531                 return 0;
532         }
533         card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
534
535         return 0;
536 }
537
538 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
539 {
540         QETH_DBF_TEXT(TRACE, 2, "L2Delmac");
541         if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
542                 return 0;
543         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC,
544                                           qeth_l2_send_delmac_cb);
545 }
546
547 static int qeth_l2_request_initial_mac(struct qeth_card *card)
548 {
549         int rc = 0;
550         char vendor_pre[] = {0x02, 0x00, 0x00};
551
552         QETH_DBF_TEXT(SETUP, 2, "doL2init");
553         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
554
555         rc = qeth_query_setadapterparms(card);
556         if (rc) {
557                 QETH_DBF_MESSAGE(2, "could not query adapter parameters on "
558                         "device %s: x%x\n", CARD_BUS_ID(card), rc);
559         }
560
561         if ((card->info.type == QETH_CARD_TYPE_IQD) || 
562             (card->info.guestlan)) {
563                 rc = qeth_setadpparms_change_macaddr(card);
564                 if (rc) {
565                         QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
566                                 "device %s: x%x\n", CARD_BUS_ID(card), rc);
567                         QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
568                         return rc;
569                 }
570                 QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN);
571         } else {
572                 random_ether_addr(card->dev->dev_addr);
573                 memcpy(card->dev->dev_addr, vendor_pre, 3);
574         }
575         return 0;
576 }
577
578 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
579 {
580         struct sockaddr *addr = p;
581         struct qeth_card *card = dev->ml_priv;
582         int rc = 0;
583
584         QETH_DBF_TEXT(TRACE, 3, "setmac");
585
586         if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
587                 QETH_DBF_TEXT(TRACE, 3, "setmcINV");
588                 return -EOPNOTSUPP;
589         }
590
591         if (card->info.type == QETH_CARD_TYPE_OSN) {
592                 QETH_DBF_TEXT(TRACE, 3, "setmcOSN");
593                 return -EOPNOTSUPP;
594         }
595         QETH_DBF_TEXT_(TRACE, 3, "%s", CARD_BUS_ID(card));
596         QETH_DBF_HEX(TRACE, 3, addr->sa_data, OSA_ADDR_LEN);
597         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
598                 QETH_DBF_TEXT(TRACE, 3, "setmcREC");
599                 return -ERESTARTSYS;
600         }
601         rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
602         if (!rc)
603                 rc = qeth_l2_send_setmac(card, addr->sa_data);
604         return rc;
605 }
606
607 static void qeth_l2_set_multicast_list(struct net_device *dev)
608 {
609         struct qeth_card *card = dev->ml_priv;
610         struct dev_addr_list *dm;
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         for (dm = dev->mc_list; dm; dm = dm->next)
623                 qeth_l2_add_mc(card, dm->da_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                 if (card->dev) {
1075                         rtnl_lock();
1076                         dev_close(card->dev);
1077                         rtnl_unlock();
1078                 }
1079                 dev_warn(&card->gdev->dev, "The qeth device driver "
1080                         "failed to recover an error on the device\n");
1081         }
1082         return 0;
1083 }
1084
1085 static int __init qeth_l2_init(void)
1086 {
1087         pr_info("register layer 2 discipline\n");
1088         return 0;
1089 }
1090
1091 static void __exit qeth_l2_exit(void)
1092 {
1093         pr_info("unregister layer 2 discipline\n");
1094 }
1095
1096 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1097 {
1098         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1099         qeth_qdio_clear_card(card, 0);
1100         qeth_clear_qdio_buffers(card);
1101 }
1102
1103 static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev)
1104 {
1105         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1106
1107         if (card->dev)
1108                 netif_device_detach(card->dev);
1109         qeth_set_allowed_threads(card, 0, 1);
1110         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1111         if (gdev->state == CCWGROUP_OFFLINE)
1112                 return 0;
1113         if (card->state == CARD_STATE_UP) {
1114                 card->use_hard_stop = 1;
1115                 __qeth_l2_set_offline(card->gdev, 1);
1116         } else
1117                 __qeth_l2_set_offline(card->gdev, 0);
1118         return 0;
1119 }
1120
1121 static int qeth_l2_pm_resume(struct ccwgroup_device *gdev)
1122 {
1123         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1124         int rc = 0;
1125
1126         if (gdev->state == CCWGROUP_OFFLINE)
1127                 goto out;
1128
1129         if (card->state == CARD_STATE_RECOVER) {
1130                 rc = __qeth_l2_set_online(card->gdev, 1);
1131                 if (rc) {
1132                         if (card->dev) {
1133                                 rtnl_lock();
1134                                 dev_close(card->dev);
1135                                 rtnl_unlock();
1136                         }
1137                 }
1138         } else
1139                 rc = __qeth_l2_set_online(card->gdev, 0);
1140 out:
1141         qeth_set_allowed_threads(card, 0xffffffff, 0);
1142         if (card->dev)
1143                 netif_device_attach(card->dev);
1144         if (rc)
1145                 dev_warn(&card->gdev->dev, "The qeth device driver "
1146                         "failed to recover an error on the device\n");
1147         return rc;
1148 }
1149
1150 struct ccwgroup_driver qeth_l2_ccwgroup_driver = {
1151         .probe = qeth_l2_probe_device,
1152         .remove = qeth_l2_remove_device,
1153         .set_online = qeth_l2_set_online,
1154         .set_offline = qeth_l2_set_offline,
1155         .shutdown = qeth_l2_shutdown,
1156         .freeze = qeth_l2_pm_suspend,
1157         .thaw = qeth_l2_pm_resume,
1158         .restore = qeth_l2_pm_resume,
1159 };
1160 EXPORT_SYMBOL_GPL(qeth_l2_ccwgroup_driver);
1161
1162 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1163                            struct qeth_cmd_buffer *iob)
1164 {
1165         unsigned long flags;
1166         int rc = 0;
1167
1168         QETH_DBF_TEXT(TRACE, 5, "osndctrd");
1169
1170         wait_event(card->wait_q,
1171                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1172         qeth_prepare_control_data(card, len, iob);
1173         QETH_DBF_TEXT(TRACE, 6, "osnoirqp");
1174         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1175         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1176                               (addr_t) iob, 0, 0);
1177         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1178         if (rc) {
1179                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1180                            "ccw_device_start rc = %i\n", rc);
1181                 QETH_DBF_TEXT_(TRACE, 2, " err%d", rc);
1182                 qeth_release_buffer(iob->channel, iob);
1183                 atomic_set(&card->write.irq_pending, 0);
1184                 wake_up(&card->wait_q);
1185         }
1186         return rc;
1187 }
1188
1189 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1190                         struct qeth_cmd_buffer *iob, int data_len)
1191 {
1192         u16 s1, s2;
1193
1194         QETH_DBF_TEXT(TRACE, 4, "osndipa");
1195
1196         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1197         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1198         s2 = (u16)data_len;
1199         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1200         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1201         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1202         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1203         return qeth_osn_send_control_data(card, s1, iob);
1204 }
1205
1206 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1207 {
1208         struct qeth_cmd_buffer *iob;
1209         struct qeth_card *card;
1210         int rc;
1211
1212         QETH_DBF_TEXT(TRACE, 2, "osnsdmc");
1213         if (!dev)
1214                 return -ENODEV;
1215         card = dev->ml_priv;
1216         if (!card)
1217                 return -ENODEV;
1218         if ((card->state != CARD_STATE_UP) &&
1219             (card->state != CARD_STATE_SOFTSETUP))
1220                 return -ENODEV;
1221         iob = qeth_wait_for_buffer(&card->write);
1222         memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1223         rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1224         return rc;
1225 }
1226 EXPORT_SYMBOL(qeth_osn_assist);
1227
1228 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1229                   int (*assist_cb)(struct net_device *, void *),
1230                   int (*data_cb)(struct sk_buff *))
1231 {
1232         struct qeth_card *card;
1233
1234         QETH_DBF_TEXT(TRACE, 2, "osnreg");
1235         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1236         if (*dev == NULL)
1237                 return -ENODEV;
1238         card = (*dev)->ml_priv;
1239         if (!card)
1240                 return -ENODEV;
1241         if ((assist_cb == NULL) || (data_cb == NULL))
1242                 return -EINVAL;
1243         card->osn_info.assist_cb = assist_cb;
1244         card->osn_info.data_cb = data_cb;
1245         return 0;
1246 }
1247 EXPORT_SYMBOL(qeth_osn_register);
1248
1249 void qeth_osn_deregister(struct net_device *dev)
1250 {
1251         struct qeth_card *card;
1252
1253         QETH_DBF_TEXT(TRACE, 2, "osndereg");
1254         if (!dev)
1255                 return;
1256         card = dev->ml_priv;
1257         if (!card)
1258                 return;
1259         card->osn_info.assist_cb = NULL;
1260         card->osn_info.data_cb = NULL;
1261         return;
1262 }
1263 EXPORT_SYMBOL(qeth_osn_deregister);
1264
1265 module_init(qeth_l2_init);
1266 module_exit(qeth_l2_exit);
1267 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1268 MODULE_DESCRIPTION("qeth layer 2 discipline");
1269 MODULE_LICENSE("GPL");