Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6
[linux-2.6] / drivers / s390 / net / qeth_l2_main.c
1 /*
2  *  drivers/s390/net/qeth_l2_main.c
3  *
4  *    Copyright IBM Corp. 2007
5  *    Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
6  *               Frank Pavlic <fpavlic@de.ibm.com>,
7  *               Thomas Spatzier <tspat@de.ibm.com>,
8  *               Frank Blaschka <frank.blaschka@de.ibm.com>
9  */
10
11 #include <linux/module.h>
12 #include <linux/moduleparam.h>
13 #include <linux/string.h>
14 #include <linux/errno.h>
15 #include <linux/kernel.h>
16 #include <linux/etherdevice.h>
17 #include <linux/mii.h>
18 #include <linux/ip.h>
19
20 #include <asm/s390_rdev.h>
21
22 #include "qeth_core.h"
23 #include "qeth_core_offl.h"
24
25 static int qeth_l2_set_offline(struct ccwgroup_device *);
26 static int qeth_l2_stop(struct net_device *);
27 static int qeth_l2_send_delmac(struct qeth_card *, __u8 *);
28 static int qeth_l2_send_setdelmac(struct qeth_card *, __u8 *,
29                            enum qeth_ipa_cmds,
30                            int (*reply_cb) (struct qeth_card *,
31                                             struct qeth_reply*,
32                                             unsigned long));
33 static void qeth_l2_set_multicast_list(struct net_device *);
34 static int qeth_l2_recover(void *);
35
36 static int qeth_l2_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
37 {
38         struct qeth_card *card = dev->ml_priv;
39         struct mii_ioctl_data *mii_data;
40         int rc = 0;
41
42         if (!card)
43                 return -ENODEV;
44
45         if ((card->state != CARD_STATE_UP) &&
46                 (card->state != CARD_STATE_SOFTSETUP))
47                 return -ENODEV;
48
49         if (card->info.type == QETH_CARD_TYPE_OSN)
50                 return -EPERM;
51
52         switch (cmd) {
53         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
54                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
55                 break;
56         case SIOC_QETH_GET_CARD_TYPE:
57                 if ((card->info.type == QETH_CARD_TYPE_OSAE) &&
58                     !card->info.guestlan)
59                         return 1;
60                 return 0;
61                 break;
62         case SIOCGMIIPHY:
63                 mii_data = if_mii(rq);
64                 mii_data->phy_id = 0;
65                 break;
66         case SIOCGMIIREG:
67                 mii_data = if_mii(rq);
68                 if (mii_data->phy_id != 0)
69                         rc = -EINVAL;
70                 else
71                         mii_data->val_out = qeth_mdio_read(dev,
72                                 mii_data->phy_id, mii_data->reg_num);
73                 break;
74         default:
75                 rc = -EOPNOTSUPP;
76         }
77         if (rc)
78                 QETH_DBF_TEXT_(TRACE, 2, "ioce%d", rc);
79         return rc;
80 }
81
82 static int qeth_l2_verify_dev(struct net_device *dev)
83 {
84         struct qeth_card *card;
85         unsigned long flags;
86         int rc = 0;
87
88         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
89         list_for_each_entry(card, &qeth_core_card_list.list, list) {
90                 if (card->dev == dev) {
91                         rc = QETH_REAL_CARD;
92                         break;
93                 }
94         }
95         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
96
97         return rc;
98 }
99
100 static struct net_device *qeth_l2_netdev_by_devno(unsigned char *read_dev_no)
101 {
102         struct qeth_card *card;
103         struct net_device *ndev;
104         __u16 temp_dev_no;
105         unsigned long flags;
106         struct ccw_dev_id read_devid;
107
108         ndev = NULL;
109         memcpy(&temp_dev_no, read_dev_no, 2);
110         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
111         list_for_each_entry(card, &qeth_core_card_list.list, list) {
112                 ccw_device_get_id(CARD_RDEV(card), &read_devid);
113                 if (read_devid.devno == temp_dev_no) {
114                         ndev = card->dev;
115                         break;
116                 }
117         }
118         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
119         return ndev;
120 }
121
122 static int qeth_l2_send_setgroupmac_cb(struct qeth_card *card,
123                                 struct qeth_reply *reply,
124                                 unsigned long data)
125 {
126         struct qeth_ipa_cmd *cmd;
127         __u8 *mac;
128
129         QETH_DBF_TEXT(TRACE, 2, "L2Sgmacb");
130         cmd = (struct qeth_ipa_cmd *) data;
131         mac = &cmd->data.setdelmac.mac[0];
132         /* MAC already registered, needed in couple/uncouple case */
133         if (cmd->hdr.return_code == 0x2005) {
134                 QETH_DBF_MESSAGE(2, "Group MAC %02x:%02x:%02x:%02x:%02x:%02x "
135                           "already existing on %s \n",
136                           mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
137                           QETH_CARD_IFNAME(card));
138                 cmd->hdr.return_code = 0;
139         }
140         if (cmd->hdr.return_code)
141                 QETH_DBF_MESSAGE(2, "Could not set group MAC "
142                           "%02x:%02x:%02x:%02x:%02x:%02x on %s: %x\n",
143                           mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
144                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
145         return 0;
146 }
147
148 static int qeth_l2_send_setgroupmac(struct qeth_card *card, __u8 *mac)
149 {
150         QETH_DBF_TEXT(TRACE, 2, "L2Sgmac");
151         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETGMAC,
152                                           qeth_l2_send_setgroupmac_cb);
153 }
154
155 static int qeth_l2_send_delgroupmac_cb(struct qeth_card *card,
156                                 struct qeth_reply *reply,
157                                 unsigned long data)
158 {
159         struct qeth_ipa_cmd *cmd;
160         __u8 *mac;
161
162         QETH_DBF_TEXT(TRACE, 2, "L2Dgmacb");
163         cmd = (struct qeth_ipa_cmd *) data;
164         mac = &cmd->data.setdelmac.mac[0];
165         if (cmd->hdr.return_code)
166                 QETH_DBF_MESSAGE(2, "Could not delete group MAC "
167                           "%02x:%02x:%02x:%02x:%02x:%02x on %s: %x\n",
168                           mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
169                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
170         return 0;
171 }
172
173 static int qeth_l2_send_delgroupmac(struct qeth_card *card, __u8 *mac)
174 {
175         QETH_DBF_TEXT(TRACE, 2, "L2Dgmac");
176         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELGMAC,
177                                           qeth_l2_send_delgroupmac_cb);
178 }
179
180 static void qeth_l2_add_mc(struct qeth_card *card, __u8 *mac, int vmac)
181 {
182         struct qeth_mc_mac *mc;
183         int rc;
184
185         mc = kmalloc(sizeof(struct qeth_mc_mac), GFP_ATOMIC);
186
187         if (!mc)
188                 return;
189
190         memcpy(mc->mc_addr, mac, OSA_ADDR_LEN);
191         mc->mc_addrlen = OSA_ADDR_LEN;
192         mc->is_vmac = vmac;
193
194         if (vmac) {
195                 rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
196                                         NULL);
197         } else {
198                 rc = qeth_l2_send_setgroupmac(card, mac);
199         }
200
201         if (!rc)
202                 list_add_tail(&mc->list, &card->mc_list);
203         else
204                 kfree(mc);
205 }
206
207 static void qeth_l2_del_all_mc(struct qeth_card *card)
208 {
209         struct qeth_mc_mac *mc, *tmp;
210
211         spin_lock_bh(&card->mclock);
212         list_for_each_entry_safe(mc, tmp, &card->mc_list, list) {
213                 if (mc->is_vmac)
214                         qeth_l2_send_setdelmac(card, mc->mc_addr,
215                                         IPA_CMD_DELVMAC, NULL);
216                 else
217                         qeth_l2_send_delgroupmac(card, mc->mc_addr);
218                 list_del(&mc->list);
219                 kfree(mc);
220         }
221         spin_unlock_bh(&card->mclock);
222 }
223
224 static void qeth_l2_get_packet_type(struct qeth_card *card,
225                         struct qeth_hdr *hdr, struct sk_buff *skb)
226 {
227         __u16 hdr_mac;
228
229         if (!memcmp(skb->data + QETH_HEADER_SIZE,
230                     skb->dev->broadcast, 6)) {
231                 /* broadcast? */
232                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
233                 return;
234         }
235         hdr_mac = *((__u16 *)skb->data);
236         /* tr multicast? */
237         switch (card->info.link_type) {
238         case QETH_LINK_TYPE_HSTR:
239         case QETH_LINK_TYPE_LANE_TR:
240                 if ((hdr_mac == QETH_TR_MAC_NC) ||
241                     (hdr_mac == QETH_TR_MAC_C))
242                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
243                 else
244                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
245                 break;
246                 /* eth or so multicast? */
247         default:
248                 if ((hdr_mac == QETH_ETH_MAC_V4) ||
249                      (hdr_mac == QETH_ETH_MAC_V6))
250                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
251                 else
252                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
253         }
254 }
255
256 static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
257                         struct sk_buff *skb, int ipv, int cast_type)
258 {
259         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
260
261         memset(hdr, 0, sizeof(struct qeth_hdr));
262         hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
263
264         /* set byte byte 3 to casting flags */
265         if (cast_type == RTN_MULTICAST)
266                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
267         else if (cast_type == RTN_BROADCAST)
268                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
269         else
270                 qeth_l2_get_packet_type(card, hdr, skb);
271
272         hdr->hdr.l2.pkt_length = skb->len-QETH_HEADER_SIZE;
273         /* VSWITCH relies on the VLAN
274          * information to be present in
275          * the QDIO header */
276         if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
277                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
278                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
279         }
280 }
281
282 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
283                         struct qeth_reply *reply, unsigned long data)
284 {
285         struct qeth_ipa_cmd *cmd;
286
287         QETH_DBF_TEXT(TRACE, 2, "L2sdvcb");
288         cmd = (struct qeth_ipa_cmd *) data;
289         if (cmd->hdr.return_code) {
290                 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x. "
291                           "Continuing\n", cmd->data.setdelvlan.vlan_id,
292                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
293                 QETH_DBF_TEXT_(TRACE, 2, "L2VL%4x", cmd->hdr.command);
294                 QETH_DBF_TEXT_(TRACE, 2, "L2%s", CARD_BUS_ID(card));
295                 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
296         }
297         return 0;
298 }
299
300 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
301                                 enum qeth_ipa_cmds ipacmd)
302 {
303         struct qeth_ipa_cmd *cmd;
304         struct qeth_cmd_buffer *iob;
305
306         QETH_DBF_TEXT_(TRACE, 4, "L2sdv%x", ipacmd);
307         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
308         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
309         cmd->data.setdelvlan.vlan_id = i;
310         return qeth_send_ipa_cmd(card, iob,
311                                  qeth_l2_send_setdelvlan_cb, NULL);
312 }
313
314 static void qeth_l2_process_vlans(struct qeth_card *card, int clear)
315 {
316         struct qeth_vlan_vid *id;
317         QETH_DBF_TEXT(TRACE, 3, "L2prcvln");
318         spin_lock_bh(&card->vlanlock);
319         list_for_each_entry(id, &card->vid_list, list) {
320                 if (clear)
321                         qeth_l2_send_setdelvlan(card, id->vid,
322                                 IPA_CMD_DELVLAN);
323                 else
324                         qeth_l2_send_setdelvlan(card, id->vid,
325                                 IPA_CMD_SETVLAN);
326         }
327         spin_unlock_bh(&card->vlanlock);
328 }
329
330 static void qeth_l2_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
331 {
332         struct qeth_card *card = dev->ml_priv;
333         struct qeth_vlan_vid *id;
334
335         QETH_DBF_TEXT_(TRACE, 4, "aid:%d", vid);
336         id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
337         if (id) {
338                 id->vid = vid;
339                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
340                 spin_lock_bh(&card->vlanlock);
341                 list_add_tail(&id->list, &card->vid_list);
342                 spin_unlock_bh(&card->vlanlock);
343         }
344 }
345
346 static void qeth_l2_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
347 {
348         struct qeth_vlan_vid *id, *tmpid = NULL;
349         struct qeth_card *card = dev->ml_priv;
350
351         QETH_DBF_TEXT_(TRACE, 4, "kid:%d", vid);
352         spin_lock_bh(&card->vlanlock);
353         list_for_each_entry(id, &card->vid_list, list) {
354                 if (id->vid == vid) {
355                         list_del(&id->list);
356                         tmpid = id;
357                         break;
358                 }
359         }
360         spin_unlock_bh(&card->vlanlock);
361         if (tmpid) {
362                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
363                 kfree(tmpid);
364         }
365         qeth_l2_set_multicast_list(card->dev);
366 }
367
368 static int qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
369 {
370         int rc = 0;
371
372         QETH_DBF_TEXT(SETUP , 2, "stopcard");
373         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
374
375         qeth_set_allowed_threads(card, 0, 1);
376         if (card->read.state == CH_STATE_UP &&
377             card->write.state == CH_STATE_UP &&
378             (card->state == CARD_STATE_UP)) {
379                 if (recovery_mode &&
380                     card->info.type != QETH_CARD_TYPE_OSN) {
381                         qeth_l2_stop(card->dev);
382                 } else {
383                         rtnl_lock();
384                         dev_close(card->dev);
385                         rtnl_unlock();
386                 }
387                 if (!card->use_hard_stop) {
388                         __u8 *mac = &card->dev->dev_addr[0];
389                         rc = qeth_l2_send_delmac(card, mac);
390                         QETH_DBF_TEXT_(SETUP, 2, "Lerr%d", rc);
391                 }
392                 card->state = CARD_STATE_SOFTSETUP;
393         }
394         if (card->state == CARD_STATE_SOFTSETUP) {
395                 qeth_l2_process_vlans(card, 1);
396                 if (!card->use_hard_stop)
397                         qeth_l2_del_all_mc(card);
398                 qeth_clear_ipacmd_list(card);
399                 card->state = CARD_STATE_HARDSETUP;
400         }
401         if (card->state == CARD_STATE_HARDSETUP) {
402                 qeth_qdio_clear_card(card, 0);
403                 qeth_clear_qdio_buffers(card);
404                 qeth_clear_working_pool_list(card);
405                 card->state = CARD_STATE_DOWN;
406         }
407         if (card->state == CARD_STATE_DOWN) {
408                 qeth_clear_cmd_buffers(&card->read);
409                 qeth_clear_cmd_buffers(&card->write);
410         }
411         card->use_hard_stop = 0;
412         return rc;
413 }
414
415 static void qeth_l2_process_inbound_buffer(struct qeth_card *card,
416                             struct qeth_qdio_buffer *buf, int index)
417 {
418         struct qdio_buffer_element *element;
419         struct sk_buff *skb;
420         struct qeth_hdr *hdr;
421         int offset;
422         unsigned int len;
423
424         /* get first element of current buffer */
425         element = (struct qdio_buffer_element *)&buf->buffer->element[0];
426         offset = 0;
427         if (card->options.performance_stats)
428                 card->perf_stats.bufs_rec++;
429         while ((skb = qeth_core_get_next_skb(card, buf->buffer, &element,
430                                        &offset, &hdr))) {
431                 skb->dev = card->dev;
432                 /* is device UP ? */
433                 if (!(card->dev->flags & IFF_UP)) {
434                         dev_kfree_skb_any(skb);
435                         continue;
436                 }
437
438                 switch (hdr->hdr.l2.id) {
439                 case QETH_HEADER_TYPE_LAYER2:
440                         skb->pkt_type = PACKET_HOST;
441                         skb->protocol = eth_type_trans(skb, skb->dev);
442                         if (card->options.checksum_type == NO_CHECKSUMMING)
443                                 skb->ip_summed = CHECKSUM_UNNECESSARY;
444                         else
445                                 skb->ip_summed = CHECKSUM_NONE;
446                         if (skb->protocol == htons(ETH_P_802_2))
447                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
448                         len = skb->len;
449                         netif_rx(skb);
450                         break;
451                 case QETH_HEADER_TYPE_OSN:
452                         if (card->info.type == QETH_CARD_TYPE_OSN) {
453                                 skb_push(skb, sizeof(struct qeth_hdr));
454                                 skb_copy_to_linear_data(skb, hdr,
455                                                 sizeof(struct qeth_hdr));
456                                 len = skb->len;
457                                 card->osn_info.data_cb(skb);
458                                 break;
459                         }
460                         /* else unknown */
461                 default:
462                         dev_kfree_skb_any(skb);
463                         QETH_DBF_TEXT(TRACE, 3, "inbunkno");
464                         QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
465                         continue;
466                 }
467                 card->dev->last_rx = jiffies;
468                 card->stats.rx_packets++;
469                 card->stats.rx_bytes += len;
470         }
471 }
472
473 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
474                            enum qeth_ipa_cmds ipacmd,
475                            int (*reply_cb) (struct qeth_card *,
476                                             struct qeth_reply*,
477                                             unsigned long))
478 {
479         struct qeth_ipa_cmd *cmd;
480         struct qeth_cmd_buffer *iob;
481
482         QETH_DBF_TEXT(TRACE, 2, "L2sdmac");
483         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
484         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
485         cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
486         memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
487         return qeth_send_ipa_cmd(card, iob, reply_cb, NULL);
488 }
489
490 static int qeth_l2_send_setmac_cb(struct qeth_card *card,
491                            struct qeth_reply *reply,
492                            unsigned long data)
493 {
494         struct qeth_ipa_cmd *cmd;
495
496         QETH_DBF_TEXT(TRACE, 2, "L2Smaccb");
497         cmd = (struct qeth_ipa_cmd *) data;
498         if (cmd->hdr.return_code) {
499                 QETH_DBF_TEXT_(TRACE, 2, "L2er%x", cmd->hdr.return_code);
500                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
501                 cmd->hdr.return_code = -EIO;
502         } else {
503                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
504                 memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac,
505                        OSA_ADDR_LEN);
506                 PRINT_INFO("MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x "
507                            "successfully registered on device %s\n",
508                            card->dev->dev_addr[0], card->dev->dev_addr[1],
509                            card->dev->dev_addr[2], card->dev->dev_addr[3],
510                            card->dev->dev_addr[4], card->dev->dev_addr[5],
511                            card->dev->name);
512         }
513         return 0;
514 }
515
516 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
517 {
518         QETH_DBF_TEXT(TRACE, 2, "L2Setmac");
519         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
520                                           qeth_l2_send_setmac_cb);
521 }
522
523 static int qeth_l2_send_delmac_cb(struct qeth_card *card,
524                            struct qeth_reply *reply,
525                            unsigned long data)
526 {
527         struct qeth_ipa_cmd *cmd;
528
529         QETH_DBF_TEXT(TRACE, 2, "L2Dmaccb");
530         cmd = (struct qeth_ipa_cmd *) data;
531         if (cmd->hdr.return_code) {
532                 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
533                 cmd->hdr.return_code = -EIO;
534                 return 0;
535         }
536         card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
537
538         return 0;
539 }
540
541 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
542 {
543         QETH_DBF_TEXT(TRACE, 2, "L2Delmac");
544         if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
545                 return 0;
546         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC,
547                                           qeth_l2_send_delmac_cb);
548 }
549
550 static int qeth_l2_request_initial_mac(struct qeth_card *card)
551 {
552         int rc = 0;
553         char vendor_pre[] = {0x02, 0x00, 0x00};
554
555         QETH_DBF_TEXT(SETUP, 2, "doL2init");
556         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
557
558         rc = qeth_query_setadapterparms(card);
559         if (rc) {
560                 QETH_DBF_MESSAGE(2, "could not query adapter parameters on "
561                         "device %s: x%x\n", CARD_BUS_ID(card), rc);
562         }
563
564         if ((card->info.type == QETH_CARD_TYPE_IQD) || 
565             (card->info.guestlan)) {
566                 rc = qeth_setadpparms_change_macaddr(card);
567                 if (rc) {
568                         QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
569                                 "device %s: x%x\n", CARD_BUS_ID(card), rc);
570                         QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
571                         return rc;
572                 }
573                 QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN);
574         } else {
575                 random_ether_addr(card->dev->dev_addr);
576                 memcpy(card->dev->dev_addr, vendor_pre, 3);
577         }
578         return 0;
579 }
580
581 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
582 {
583         struct sockaddr *addr = p;
584         struct qeth_card *card = dev->ml_priv;
585         int rc = 0;
586
587         QETH_DBF_TEXT(TRACE, 3, "setmac");
588
589         if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
590                 QETH_DBF_TEXT(TRACE, 3, "setmcINV");
591                 return -EOPNOTSUPP;
592         }
593
594         if (card->info.type == QETH_CARD_TYPE_OSN) {
595                 QETH_DBF_TEXT(TRACE, 3, "setmcOSN");
596                 return -EOPNOTSUPP;
597         }
598         QETH_DBF_TEXT_(TRACE, 3, "%s", CARD_BUS_ID(card));
599         QETH_DBF_HEX(TRACE, 3, addr->sa_data, OSA_ADDR_LEN);
600         rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
601         if (!rc)
602                 rc = qeth_l2_send_setmac(card, addr->sa_data);
603         return rc;
604 }
605
606 static void qeth_l2_set_multicast_list(struct net_device *dev)
607 {
608         struct qeth_card *card = dev->ml_priv;
609         struct dev_addr_list *dm;
610
611         if (card->info.type == QETH_CARD_TYPE_OSN)
612                 return ;
613
614         QETH_DBF_TEXT(TRACE, 3, "setmulti");
615         qeth_l2_del_all_mc(card);
616         spin_lock_bh(&card->mclock);
617         for (dm = dev->mc_list; dm; dm = dm->next)
618                 qeth_l2_add_mc(card, dm->da_addr, 0);
619
620         for (dm = dev->uc_list; dm; dm = dm->next)
621                 qeth_l2_add_mc(card, dm->da_addr, 1);
622
623         spin_unlock_bh(&card->mclock);
624         if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
625                 return;
626         qeth_setadp_promisc_mode(card);
627 }
628
629 static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
630 {
631         int rc;
632         struct qeth_hdr *hdr = NULL;
633         int elements = 0;
634         struct qeth_card *card = dev->ml_priv;
635         struct sk_buff *new_skb = skb;
636         int ipv = qeth_get_ip_version(skb);
637         int cast_type = qeth_get_cast_type(card, skb);
638         struct qeth_qdio_out_q *queue = card->qdio.out_qs
639                 [qeth_get_priority_queue(card, skb, ipv, cast_type)];
640         int tx_bytes = skb->len;
641         enum qeth_large_send_types large_send = QETH_LARGE_SEND_NO;
642         struct qeth_eddp_context *ctx = NULL;
643         int data_offset = -1;
644         int elements_needed = 0;
645         int hd_len = 0;
646
647         if ((card->state != CARD_STATE_UP) || !card->lan_online) {
648                 card->stats.tx_carrier_errors++;
649                 goto tx_drop;
650         }
651
652         if ((card->info.type == QETH_CARD_TYPE_OSN) &&
653             (skb->protocol == htons(ETH_P_IPV6)))
654                 goto tx_drop;
655
656         if (card->options.performance_stats) {
657                 card->perf_stats.outbound_cnt++;
658                 card->perf_stats.outbound_start_time = qeth_get_micros();
659         }
660         netif_stop_queue(dev);
661
662         if (skb_is_gso(skb))
663                 large_send = QETH_LARGE_SEND_EDDP;
664
665         if (card->info.type == QETH_CARD_TYPE_OSN)
666                 hdr = (struct qeth_hdr *)skb->data;
667         else {
668                 if ((card->info.type == QETH_CARD_TYPE_IQD) && (!large_send) &&
669                     (skb_shinfo(skb)->nr_frags == 0)) {
670                         new_skb = skb;
671                         data_offset = ETH_HLEN;
672                         hd_len = ETH_HLEN;
673                         hdr = kmem_cache_alloc(qeth_core_header_cache,
674                                                 GFP_ATOMIC);
675                         if (!hdr)
676                                 goto tx_drop;
677                         elements_needed++;
678                         skb_reset_mac_header(new_skb);
679                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
680                         hdr->hdr.l2.pkt_length = new_skb->len;
681                         memcpy(((char *)hdr) + sizeof(struct qeth_hdr),
682                                 skb_mac_header(new_skb), ETH_HLEN);
683                 } else {
684                         /* create a clone with writeable headroom */
685                         new_skb = skb_realloc_headroom(skb,
686                                                 sizeof(struct qeth_hdr));
687                         if (!new_skb)
688                                 goto tx_drop;
689                         hdr = (struct qeth_hdr *)skb_push(new_skb,
690                                                 sizeof(struct qeth_hdr));
691                         skb_set_mac_header(new_skb, sizeof(struct qeth_hdr));
692                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
693                 }
694         }
695
696         if (large_send == QETH_LARGE_SEND_EDDP) {
697                 ctx = qeth_eddp_create_context(card, new_skb, hdr,
698                                                 skb->sk->sk_protocol);
699                 if (ctx == NULL) {
700                         QETH_DBF_MESSAGE(2, "could not create eddp context\n");
701                         goto tx_drop;
702                 }
703         } else {
704                 elements = qeth_get_elements_no(card, (void *)hdr, new_skb,
705                                                 elements_needed);
706                 if (!elements) {
707                         if (data_offset >= 0)
708                                 kmem_cache_free(qeth_core_header_cache, hdr);
709                         goto tx_drop;
710                 }
711         }
712
713         if ((large_send == QETH_LARGE_SEND_NO) &&
714             (skb->ip_summed == CHECKSUM_PARTIAL))
715                 qeth_tx_csum(new_skb);
716
717         if (card->info.type != QETH_CARD_TYPE_IQD)
718                 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
719                                          elements, ctx);
720         else
721                 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
722                                         elements, ctx, data_offset, hd_len);
723         if (!rc) {
724                 card->stats.tx_packets++;
725                 card->stats.tx_bytes += tx_bytes;
726                 if (new_skb != skb)
727                         dev_kfree_skb_any(skb);
728                 if (card->options.performance_stats) {
729                         if (large_send != QETH_LARGE_SEND_NO) {
730                                 card->perf_stats.large_send_bytes += tx_bytes;
731                                 card->perf_stats.large_send_cnt++;
732                         }
733                         if (skb_shinfo(new_skb)->nr_frags > 0) {
734                                 card->perf_stats.sg_skbs_sent++;
735                                 /* nr_frags + skb->data */
736                                 card->perf_stats.sg_frags_sent +=
737                                         skb_shinfo(new_skb)->nr_frags + 1;
738                         }
739                 }
740
741                 if (ctx != NULL) {
742                         qeth_eddp_put_context(ctx);
743                         dev_kfree_skb_any(new_skb);
744                 }
745         } else {
746                 if (ctx != NULL)
747                         qeth_eddp_put_context(ctx);
748
749                 if (data_offset >= 0)
750                         kmem_cache_free(qeth_core_header_cache, hdr);
751
752                 if (rc == -EBUSY) {
753                         if (new_skb != skb)
754                                 dev_kfree_skb_any(new_skb);
755                         return NETDEV_TX_BUSY;
756                 } else
757                         goto tx_drop;
758         }
759
760         netif_wake_queue(dev);
761         if (card->options.performance_stats)
762                 card->perf_stats.outbound_time += qeth_get_micros() -
763                         card->perf_stats.outbound_start_time;
764         return rc;
765
766 tx_drop:
767         card->stats.tx_dropped++;
768         card->stats.tx_errors++;
769         if ((new_skb != skb) && new_skb)
770                 dev_kfree_skb_any(new_skb);
771         dev_kfree_skb_any(skb);
772         netif_wake_queue(dev);
773         return NETDEV_TX_OK;
774 }
775
776 static void qeth_l2_qdio_input_handler(struct ccw_device *ccwdev,
777                         unsigned int qdio_err, unsigned int queue,
778                         int first_element, int count, unsigned long card_ptr)
779 {
780         struct net_device *net_dev;
781         struct qeth_card *card;
782         struct qeth_qdio_buffer *buffer;
783         int index;
784         int i;
785
786         card = (struct qeth_card *) card_ptr;
787         net_dev = card->dev;
788         if (card->options.performance_stats) {
789                 card->perf_stats.inbound_cnt++;
790                 card->perf_stats.inbound_start_time = qeth_get_micros();
791         }
792         if (qdio_err & QDIO_ERROR_ACTIVATE_CHECK_CONDITION) {
793                 QETH_DBF_TEXT(TRACE, 1, "qdinchk");
794                 QETH_DBF_TEXT_(TRACE, 1, "%s", CARD_BUS_ID(card));
795                 QETH_DBF_TEXT_(TRACE, 1, "%04X%04X", first_element,
796                                 count);
797                 QETH_DBF_TEXT_(TRACE, 1, "%04X", queue);
798                 qeth_schedule_recovery(card);
799                 return;
800         }
801         for (i = first_element; i < (first_element + count); ++i) {
802                 index = i % QDIO_MAX_BUFFERS_PER_Q;
803                 buffer = &card->qdio.in_q->bufs[index];
804                 if (!(qdio_err &&
805                       qeth_check_qdio_errors(buffer->buffer, qdio_err, "qinerr")))
806                         qeth_l2_process_inbound_buffer(card, buffer, index);
807                 /* clear buffer and give back to hardware */
808                 qeth_put_buffer_pool_entry(card, buffer->pool_entry);
809                 qeth_queue_input_buffer(card, index);
810         }
811         if (card->options.performance_stats)
812                 card->perf_stats.inbound_time += qeth_get_micros() -
813                         card->perf_stats.inbound_start_time;
814 }
815
816 static int qeth_l2_open(struct net_device *dev)
817 {
818         struct qeth_card *card = dev->ml_priv;
819
820         QETH_DBF_TEXT(TRACE, 4, "qethopen");
821         if (card->state != CARD_STATE_SOFTSETUP)
822                 return -ENODEV;
823
824         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
825              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
826                 QETH_DBF_TEXT(TRACE, 4, "nomacadr");
827                 return -EPERM;
828         }
829         card->data.state = CH_STATE_UP;
830         card->state = CARD_STATE_UP;
831         netif_start_queue(dev);
832
833         if (!card->lan_online && netif_carrier_ok(dev))
834                 netif_carrier_off(dev);
835         return 0;
836 }
837
838
839 static int qeth_l2_stop(struct net_device *dev)
840 {
841         struct qeth_card *card = dev->ml_priv;
842
843         QETH_DBF_TEXT(TRACE, 4, "qethstop");
844         netif_tx_disable(dev);
845         if (card->state == CARD_STATE_UP)
846                 card->state = CARD_STATE_SOFTSETUP;
847         return 0;
848 }
849
850 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
851 {
852         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
853
854         INIT_LIST_HEAD(&card->vid_list);
855         INIT_LIST_HEAD(&card->mc_list);
856         card->options.layer2 = 1;
857         card->discipline.input_handler = (qdio_handler_t *)
858                 qeth_l2_qdio_input_handler;
859         card->discipline.output_handler = (qdio_handler_t *)
860                 qeth_qdio_output_handler;
861         card->discipline.recover = qeth_l2_recover;
862         return 0;
863 }
864
865 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
866 {
867         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
868
869         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
870
871         if (cgdev->state == CCWGROUP_ONLINE) {
872                 card->use_hard_stop = 1;
873                 qeth_l2_set_offline(cgdev);
874         }
875
876         if (card->dev) {
877                 unregister_netdev(card->dev);
878                 card->dev = NULL;
879         }
880
881         qeth_l2_del_all_mc(card);
882         return;
883 }
884
885 static int qeth_l2_ethtool_set_tso(struct net_device *dev, u32 data)
886 {
887         struct qeth_card *card = dev->ml_priv;
888
889         if (data) {
890                 if (card->options.large_send == QETH_LARGE_SEND_NO) {
891                         card->options.large_send = QETH_LARGE_SEND_EDDP;
892                         dev->features |= NETIF_F_TSO;
893                 }
894         } else {
895                 dev->features &= ~NETIF_F_TSO;
896                 card->options.large_send = QETH_LARGE_SEND_NO;
897         }
898         return 0;
899 }
900
901 static struct ethtool_ops qeth_l2_ethtool_ops = {
902         .get_link = ethtool_op_get_link,
903         .get_tx_csum = ethtool_op_get_tx_csum,
904         .set_tx_csum = ethtool_op_set_tx_hw_csum,
905         .get_sg = ethtool_op_get_sg,
906         .set_sg = ethtool_op_set_sg,
907         .get_tso = ethtool_op_get_tso,
908         .set_tso = qeth_l2_ethtool_set_tso,
909         .get_strings = qeth_core_get_strings,
910         .get_ethtool_stats = qeth_core_get_ethtool_stats,
911         .get_stats_count = qeth_core_get_stats_count,
912         .get_drvinfo = qeth_core_get_drvinfo,
913         .get_settings = qeth_core_ethtool_get_settings,
914 };
915
916 static struct ethtool_ops qeth_l2_osn_ops = {
917         .get_strings = qeth_core_get_strings,
918         .get_ethtool_stats = qeth_core_get_ethtool_stats,
919         .get_stats_count = qeth_core_get_stats_count,
920         .get_drvinfo = qeth_core_get_drvinfo,
921 };
922
923 static int qeth_l2_setup_netdev(struct qeth_card *card)
924 {
925         switch (card->info.type) {
926         case QETH_CARD_TYPE_OSAE:
927                 card->dev = alloc_etherdev(0);
928                 break;
929         case QETH_CARD_TYPE_IQD:
930                 card->dev = alloc_netdev(0, "hsi%d", ether_setup);
931                 break;
932         case QETH_CARD_TYPE_OSN:
933                 card->dev = alloc_netdev(0, "osn%d", ether_setup);
934                 card->dev->flags |= IFF_NOARP;
935                 break;
936         default:
937                 card->dev = alloc_etherdev(0);
938         }
939
940         if (!card->dev)
941                 return -ENODEV;
942
943         card->dev->ml_priv = card;
944         card->dev->tx_timeout = &qeth_tx_timeout;
945         card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
946         card->dev->open = qeth_l2_open;
947         card->dev->stop = qeth_l2_stop;
948         card->dev->hard_start_xmit = qeth_l2_hard_start_xmit;
949         card->dev->do_ioctl = qeth_l2_do_ioctl;
950         card->dev->get_stats = qeth_get_stats;
951         card->dev->change_mtu = qeth_change_mtu;
952         card->dev->set_multicast_list = qeth_l2_set_multicast_list;
953         card->dev->vlan_rx_kill_vid = qeth_l2_vlan_rx_kill_vid;
954         card->dev->vlan_rx_add_vid = qeth_l2_vlan_rx_add_vid;
955         card->dev->set_mac_address = qeth_l2_set_mac_address;
956         card->dev->mtu = card->info.initial_mtu;
957         if (card->info.type != QETH_CARD_TYPE_OSN)
958                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_ethtool_ops);
959         else
960                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_osn_ops);
961         card->dev->features |= NETIF_F_HW_VLAN_FILTER;
962         card->info.broadcast_capable = 1;
963         qeth_l2_request_initial_mac(card);
964         SET_NETDEV_DEV(card->dev, &card->gdev->dev);
965         return register_netdev(card->dev);
966 }
967
968 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
969 {
970         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
971         int rc = 0;
972         enum qeth_card_states recover_flag;
973
974         BUG_ON(!card);
975         QETH_DBF_TEXT(SETUP, 2, "setonlin");
976         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
977
978         qeth_set_allowed_threads(card, QETH_RECOVER_THREAD, 1);
979         recover_flag = card->state;
980         rc = ccw_device_set_online(CARD_RDEV(card));
981         if (rc) {
982                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
983                 return -EIO;
984         }
985         rc = ccw_device_set_online(CARD_WDEV(card));
986         if (rc) {
987                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
988                 return -EIO;
989         }
990         rc = ccw_device_set_online(CARD_DDEV(card));
991         if (rc) {
992                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
993                 return -EIO;
994         }
995
996         rc = qeth_core_hardsetup_card(card);
997         if (rc) {
998                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
999                 goto out_remove;
1000         }
1001
1002         if (!card->dev && qeth_l2_setup_netdev(card))
1003                 goto out_remove;
1004
1005         if (card->info.type != QETH_CARD_TYPE_OSN)
1006                 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
1007
1008         card->state = CARD_STATE_HARDSETUP;
1009         qeth_print_status_message(card);
1010
1011         /* softsetup */
1012         QETH_DBF_TEXT(SETUP, 2, "softsetp");
1013
1014         rc = qeth_send_startlan(card);
1015         if (rc) {
1016                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1017                 if (rc == 0xe080) {
1018                         PRINT_WARN("LAN on card %s if offline! "
1019                                    "Waiting for STARTLAN from card.\n",
1020                                    CARD_BUS_ID(card));
1021                         card->lan_online = 0;
1022                 }
1023                 return rc;
1024         } else
1025                 card->lan_online = 1;
1026
1027         if (card->info.type != QETH_CARD_TYPE_OSN) {
1028                 qeth_set_large_send(card, card->options.large_send);
1029                 qeth_l2_process_vlans(card, 0);
1030         }
1031
1032         netif_tx_disable(card->dev);
1033
1034         rc = qeth_init_qdio_queues(card);
1035         if (rc) {
1036                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1037                 goto out_remove;
1038         }
1039         card->state = CARD_STATE_SOFTSETUP;
1040         netif_carrier_on(card->dev);
1041
1042         qeth_set_allowed_threads(card, 0xffffffff, 0);
1043         if (recover_flag == CARD_STATE_RECOVER) {
1044                 if (recovery_mode &&
1045                     card->info.type != QETH_CARD_TYPE_OSN) {
1046                         qeth_l2_open(card->dev);
1047                 } else {
1048                         rtnl_lock();
1049                         dev_open(card->dev);
1050                         rtnl_unlock();
1051                 }
1052                 /* this also sets saved unicast addresses */
1053                 qeth_l2_set_multicast_list(card->dev);
1054         }
1055         /* let user_space know that device is online */
1056         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1057         return 0;
1058 out_remove:
1059         card->use_hard_stop = 1;
1060         qeth_l2_stop_card(card, 0);
1061         ccw_device_set_offline(CARD_DDEV(card));
1062         ccw_device_set_offline(CARD_WDEV(card));
1063         ccw_device_set_offline(CARD_RDEV(card));
1064         if (recover_flag == CARD_STATE_RECOVER)
1065                 card->state = CARD_STATE_RECOVER;
1066         else
1067                 card->state = CARD_STATE_DOWN;
1068         return -ENODEV;
1069 }
1070
1071 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1072 {
1073         return __qeth_l2_set_online(gdev, 0);
1074 }
1075
1076 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1077                                         int recovery_mode)
1078 {
1079         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1080         int rc = 0, rc2 = 0, rc3 = 0;
1081         enum qeth_card_states recover_flag;
1082
1083         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1084         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1085
1086         if (card->dev && netif_carrier_ok(card->dev))
1087                 netif_carrier_off(card->dev);
1088         recover_flag = card->state;
1089         qeth_l2_stop_card(card, recovery_mode);
1090         rc  = ccw_device_set_offline(CARD_DDEV(card));
1091         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1092         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1093         if (!rc)
1094                 rc = (rc2) ? rc2 : rc3;
1095         if (rc)
1096                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1097         if (recover_flag == CARD_STATE_UP)
1098                 card->state = CARD_STATE_RECOVER;
1099         /* let user_space know that device is offline */
1100         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1101         return 0;
1102 }
1103
1104 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1105 {
1106         return __qeth_l2_set_offline(cgdev, 0);
1107 }
1108
1109 static int qeth_l2_recover(void *ptr)
1110 {
1111         struct qeth_card *card;
1112         int rc = 0;
1113
1114         card = (struct qeth_card *) ptr;
1115         QETH_DBF_TEXT(TRACE, 2, "recover1");
1116         QETH_DBF_HEX(TRACE, 2, &card, sizeof(void *));
1117         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1118                 return 0;
1119         QETH_DBF_TEXT(TRACE, 2, "recover2");
1120         PRINT_WARN("Recovery of device %s started ...\n",
1121                    CARD_BUS_ID(card));
1122         card->use_hard_stop = 1;
1123         __qeth_l2_set_offline(card->gdev, 1);
1124         rc = __qeth_l2_set_online(card->gdev, 1);
1125         /* don't run another scheduled recovery */
1126         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1127         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1128         if (!rc)
1129                 PRINT_INFO("Device %s successfully recovered!\n",
1130                            CARD_BUS_ID(card));
1131         else {
1132                 rtnl_lock();
1133                 dev_close(card->dev);
1134                 rtnl_unlock();
1135                 PRINT_INFO("Device %s could not be recovered!\n",
1136                            CARD_BUS_ID(card));
1137         }
1138         return 0;
1139 }
1140
1141 static int __init qeth_l2_init(void)
1142 {
1143         PRINT_INFO("register layer 2 discipline\n");
1144         return 0;
1145 }
1146
1147 static void __exit qeth_l2_exit(void)
1148 {
1149         PRINT_INFO("unregister layer 2 discipline\n");
1150 }
1151
1152 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1153 {
1154         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1155         qeth_qdio_clear_card(card, 0);
1156         qeth_clear_qdio_buffers(card);
1157 }
1158
1159 struct ccwgroup_driver qeth_l2_ccwgroup_driver = {
1160         .probe = qeth_l2_probe_device,
1161         .remove = qeth_l2_remove_device,
1162         .set_online = qeth_l2_set_online,
1163         .set_offline = qeth_l2_set_offline,
1164         .shutdown = qeth_l2_shutdown,
1165 };
1166 EXPORT_SYMBOL_GPL(qeth_l2_ccwgroup_driver);
1167
1168 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1169                            struct qeth_cmd_buffer *iob)
1170 {
1171         unsigned long flags;
1172         int rc = 0;
1173
1174         QETH_DBF_TEXT(TRACE, 5, "osndctrd");
1175
1176         wait_event(card->wait_q,
1177                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1178         qeth_prepare_control_data(card, len, iob);
1179         QETH_DBF_TEXT(TRACE, 6, "osnoirqp");
1180         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1181         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1182                               (addr_t) iob, 0, 0);
1183         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1184         if (rc) {
1185                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1186                            "ccw_device_start rc = %i\n", rc);
1187                 QETH_DBF_TEXT_(TRACE, 2, " err%d", rc);
1188                 qeth_release_buffer(iob->channel, iob);
1189                 atomic_set(&card->write.irq_pending, 0);
1190                 wake_up(&card->wait_q);
1191         }
1192         return rc;
1193 }
1194
1195 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1196                         struct qeth_cmd_buffer *iob, int data_len)
1197 {
1198         u16 s1, s2;
1199
1200         QETH_DBF_TEXT(TRACE, 4, "osndipa");
1201
1202         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1203         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1204         s2 = (u16)data_len;
1205         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1206         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1207         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1208         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1209         return qeth_osn_send_control_data(card, s1, iob);
1210 }
1211
1212 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1213 {
1214         struct qeth_cmd_buffer *iob;
1215         struct qeth_card *card;
1216         int rc;
1217
1218         QETH_DBF_TEXT(TRACE, 2, "osnsdmc");
1219         if (!dev)
1220                 return -ENODEV;
1221         card = dev->ml_priv;
1222         if (!card)
1223                 return -ENODEV;
1224         if ((card->state != CARD_STATE_UP) &&
1225             (card->state != CARD_STATE_SOFTSETUP))
1226                 return -ENODEV;
1227         iob = qeth_wait_for_buffer(&card->write);
1228         memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1229         rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1230         return rc;
1231 }
1232 EXPORT_SYMBOL(qeth_osn_assist);
1233
1234 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1235                   int (*assist_cb)(struct net_device *, void *),
1236                   int (*data_cb)(struct sk_buff *))
1237 {
1238         struct qeth_card *card;
1239
1240         QETH_DBF_TEXT(TRACE, 2, "osnreg");
1241         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1242         if (*dev == NULL)
1243                 return -ENODEV;
1244         card = (*dev)->ml_priv;
1245         if (!card)
1246                 return -ENODEV;
1247         if ((assist_cb == NULL) || (data_cb == NULL))
1248                 return -EINVAL;
1249         card->osn_info.assist_cb = assist_cb;
1250         card->osn_info.data_cb = data_cb;
1251         return 0;
1252 }
1253 EXPORT_SYMBOL(qeth_osn_register);
1254
1255 void qeth_osn_deregister(struct net_device *dev)
1256 {
1257         struct qeth_card *card;
1258
1259         QETH_DBF_TEXT(TRACE, 2, "osndereg");
1260         if (!dev)
1261                 return;
1262         card = dev->ml_priv;
1263         if (!card)
1264                 return;
1265         card->osn_info.assist_cb = NULL;
1266         card->osn_info.data_cb = NULL;
1267         return;
1268 }
1269 EXPORT_SYMBOL(qeth_osn_deregister);
1270
1271 module_init(qeth_l2_init);
1272 module_exit(qeth_l2_exit);
1273 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1274 MODULE_DESCRIPTION("qeth layer 2 discipline");
1275 MODULE_LICENSE("GPL");