qeth: l2 write unicast list to hardware
[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
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 (qeth_wait_for_threads(card, ~QETH_RECOVER_THREAD))
377                 return -ERESTARTSYS;
378         if (card->read.state == CH_STATE_UP &&
379             card->write.state == CH_STATE_UP &&
380             (card->state == CARD_STATE_UP)) {
381                 if (recovery_mode &&
382                     card->info.type != QETH_CARD_TYPE_OSN) {
383                         qeth_l2_stop(card->dev);
384                 } else {
385                         rtnl_lock();
386                         dev_close(card->dev);
387                         rtnl_unlock();
388                 }
389                 if (!card->use_hard_stop) {
390                         __u8 *mac = &card->dev->dev_addr[0];
391                         rc = qeth_l2_send_delmac(card, mac);
392                         QETH_DBF_TEXT_(SETUP, 2, "Lerr%d", rc);
393                 }
394                 card->state = CARD_STATE_SOFTSETUP;
395         }
396         if (card->state == CARD_STATE_SOFTSETUP) {
397                 qeth_l2_process_vlans(card, 1);
398                 qeth_l2_del_all_mc(card);
399                 qeth_clear_ipacmd_list(card);
400                 card->state = CARD_STATE_HARDSETUP;
401         }
402         if (card->state == CARD_STATE_HARDSETUP) {
403                 qeth_qdio_clear_card(card, 0);
404                 qeth_clear_qdio_buffers(card);
405                 qeth_clear_working_pool_list(card);
406                 card->state = CARD_STATE_DOWN;
407         }
408         if (card->state == CARD_STATE_DOWN) {
409                 qeth_clear_cmd_buffers(&card->read);
410                 qeth_clear_cmd_buffers(&card->write);
411         }
412         card->use_hard_stop = 0;
413         return rc;
414 }
415
416 static void qeth_l2_process_inbound_buffer(struct qeth_card *card,
417                             struct qeth_qdio_buffer *buf, int index)
418 {
419         struct qdio_buffer_element *element;
420         struct sk_buff *skb;
421         struct qeth_hdr *hdr;
422         int offset;
423         unsigned int len;
424
425         /* get first element of current buffer */
426         element = (struct qdio_buffer_element *)&buf->buffer->element[0];
427         offset = 0;
428         if (card->options.performance_stats)
429                 card->perf_stats.bufs_rec++;
430         while ((skb = qeth_core_get_next_skb(card, buf->buffer, &element,
431                                        &offset, &hdr))) {
432                 skb->dev = card->dev;
433                 /* is device UP ? */
434                 if (!(card->dev->flags & IFF_UP)) {
435                         dev_kfree_skb_any(skb);
436                         continue;
437                 }
438
439                 switch (hdr->hdr.l2.id) {
440                 case QETH_HEADER_TYPE_LAYER2:
441                         skb->pkt_type = PACKET_HOST;
442                         skb->protocol = eth_type_trans(skb, skb->dev);
443                         if (card->options.checksum_type == NO_CHECKSUMMING)
444                                 skb->ip_summed = CHECKSUM_UNNECESSARY;
445                         else
446                                 skb->ip_summed = CHECKSUM_NONE;
447                         if (skb->protocol == htons(ETH_P_802_2))
448                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
449                         len = skb->len;
450                         netif_rx(skb);
451                         break;
452                 case QETH_HEADER_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                 default:
460                         dev_kfree_skb_any(skb);
461                         QETH_DBF_TEXT(TRACE, 3, "inbunkno");
462                         QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
463                         continue;
464                 }
465                 card->dev->last_rx = jiffies;
466                 card->stats.rx_packets++;
467                 card->stats.rx_bytes += len;
468         }
469 }
470
471 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
472                            enum qeth_ipa_cmds ipacmd,
473                            int (*reply_cb) (struct qeth_card *,
474                                             struct qeth_reply*,
475                                             unsigned long))
476 {
477         struct qeth_ipa_cmd *cmd;
478         struct qeth_cmd_buffer *iob;
479
480         QETH_DBF_TEXT(TRACE, 2, "L2sdmac");
481         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
482         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
483         cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
484         memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
485         return qeth_send_ipa_cmd(card, iob, reply_cb, NULL);
486 }
487
488 static int qeth_l2_send_setmac_cb(struct qeth_card *card,
489                            struct qeth_reply *reply,
490                            unsigned long data)
491 {
492         struct qeth_ipa_cmd *cmd;
493
494         QETH_DBF_TEXT(TRACE, 2, "L2Smaccb");
495         cmd = (struct qeth_ipa_cmd *) data;
496         if (cmd->hdr.return_code) {
497                 QETH_DBF_TEXT_(TRACE, 2, "L2er%x", cmd->hdr.return_code);
498                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
499                 cmd->hdr.return_code = -EIO;
500         } else {
501                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
502                 memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac,
503                        OSA_ADDR_LEN);
504                 PRINT_INFO("MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x "
505                            "successfully registered on device %s\n",
506                            card->dev->dev_addr[0], card->dev->dev_addr[1],
507                            card->dev->dev_addr[2], card->dev->dev_addr[3],
508                            card->dev->dev_addr[4], card->dev->dev_addr[5],
509                            card->dev->name);
510         }
511         return 0;
512 }
513
514 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
515 {
516         QETH_DBF_TEXT(TRACE, 2, "L2Setmac");
517         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
518                                           qeth_l2_send_setmac_cb);
519 }
520
521 static int qeth_l2_send_delmac_cb(struct qeth_card *card,
522                            struct qeth_reply *reply,
523                            unsigned long data)
524 {
525         struct qeth_ipa_cmd *cmd;
526
527         QETH_DBF_TEXT(TRACE, 2, "L2Dmaccb");
528         cmd = (struct qeth_ipa_cmd *) data;
529         if (cmd->hdr.return_code) {
530                 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
531                 cmd->hdr.return_code = -EIO;
532                 return 0;
533         }
534         card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
535
536         return 0;
537 }
538
539 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
540 {
541         QETH_DBF_TEXT(TRACE, 2, "L2Delmac");
542         if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
543                 return 0;
544         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC,
545                                           qeth_l2_send_delmac_cb);
546 }
547
548 static int qeth_l2_request_initial_mac(struct qeth_card *card)
549 {
550         int rc = 0;
551         char vendor_pre[] = {0x02, 0x00, 0x00};
552
553         QETH_DBF_TEXT(SETUP, 2, "doL2init");
554         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
555
556         rc = qeth_query_setadapterparms(card);
557         if (rc) {
558                 QETH_DBF_MESSAGE(2, "could not query adapter parameters on "
559                         "device %s: x%x\n", CARD_BUS_ID(card), rc);
560         }
561
562         if (card->info.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         rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
598         if (!rc)
599                 rc = qeth_l2_send_setmac(card, addr->sa_data);
600         return rc;
601 }
602
603 static void qeth_l2_set_multicast_list(struct net_device *dev)
604 {
605         struct qeth_card *card = dev->ml_priv;
606         struct dev_addr_list *dm;
607
608         if (card->info.type == QETH_CARD_TYPE_OSN)
609                 return ;
610
611         QETH_DBF_TEXT(TRACE, 3, "setmulti");
612         qeth_l2_del_all_mc(card);
613         spin_lock_bh(&card->mclock);
614         for (dm = dev->mc_list; dm; dm = dm->next)
615                 qeth_l2_add_mc(card, dm->da_addr, 0);
616
617         for (dm = dev->uc_list; dm; dm = dm->next)
618                 qeth_l2_add_mc(card, dm->da_addr, 1);
619
620         spin_unlock_bh(&card->mclock);
621         if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
622                 return;
623         qeth_setadp_promisc_mode(card);
624 }
625
626 static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
627 {
628         int rc;
629         struct qeth_hdr *hdr = NULL;
630         int elements = 0;
631         struct qeth_card *card = dev->ml_priv;
632         struct sk_buff *new_skb = skb;
633         int ipv = qeth_get_ip_version(skb);
634         int cast_type = qeth_get_cast_type(card, skb);
635         struct qeth_qdio_out_q *queue = card->qdio.out_qs
636                 [qeth_get_priority_queue(card, skb, ipv, cast_type)];
637         int tx_bytes = skb->len;
638         enum qeth_large_send_types large_send = QETH_LARGE_SEND_NO;
639         struct qeth_eddp_context *ctx = NULL;
640         int data_offset = -1;
641         int elements_needed = 0;
642         int hd_len = 0;
643
644         if ((card->state != CARD_STATE_UP) || !card->lan_online) {
645                 card->stats.tx_carrier_errors++;
646                 goto tx_drop;
647         }
648
649         if ((card->info.type == QETH_CARD_TYPE_OSN) &&
650             (skb->protocol == htons(ETH_P_IPV6)))
651                 goto tx_drop;
652
653         if (card->options.performance_stats) {
654                 card->perf_stats.outbound_cnt++;
655                 card->perf_stats.outbound_start_time = qeth_get_micros();
656         }
657         netif_stop_queue(dev);
658
659         if (skb_is_gso(skb))
660                 large_send = QETH_LARGE_SEND_EDDP;
661
662         if (card->info.type == QETH_CARD_TYPE_OSN)
663                 hdr = (struct qeth_hdr *)skb->data;
664         else {
665                 if ((card->info.type == QETH_CARD_TYPE_IQD) && (!large_send) &&
666                     (skb_shinfo(skb)->nr_frags == 0)) {
667                         new_skb = skb;
668                         data_offset = ETH_HLEN;
669                         hd_len = ETH_HLEN;
670                         hdr = kmem_cache_alloc(qeth_core_header_cache,
671                                                 GFP_ATOMIC);
672                         if (!hdr)
673                                 goto tx_drop;
674                         elements_needed++;
675                         skb_reset_mac_header(new_skb);
676                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
677                         hdr->hdr.l2.pkt_length = new_skb->len;
678                         memcpy(((char *)hdr) + sizeof(struct qeth_hdr),
679                                 skb_mac_header(new_skb), ETH_HLEN);
680                 } else {
681                         /* create a clone with writeable headroom */
682                         new_skb = skb_realloc_headroom(skb,
683                                                 sizeof(struct qeth_hdr));
684                         if (!new_skb)
685                                 goto tx_drop;
686                         hdr = (struct qeth_hdr *)skb_push(new_skb,
687                                                 sizeof(struct qeth_hdr));
688                         skb_set_mac_header(new_skb, sizeof(struct qeth_hdr));
689                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
690                 }
691         }
692
693         if (large_send == QETH_LARGE_SEND_EDDP) {
694                 ctx = qeth_eddp_create_context(card, new_skb, hdr,
695                                                 skb->sk->sk_protocol);
696                 if (ctx == NULL) {
697                         QETH_DBF_MESSAGE(2, "could not create eddp context\n");
698                         goto tx_drop;
699                 }
700         } else {
701                 elements = qeth_get_elements_no(card, (void *)hdr, new_skb,
702                                                 elements_needed);
703                 if (!elements) {
704                         if (data_offset >= 0)
705                                 kmem_cache_free(qeth_core_header_cache, hdr);
706                         goto tx_drop;
707                 }
708         }
709
710         if ((large_send == QETH_LARGE_SEND_NO) &&
711             (skb->ip_summed == CHECKSUM_PARTIAL))
712                 qeth_tx_csum(new_skb);
713
714         if (card->info.type != QETH_CARD_TYPE_IQD)
715                 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
716                                          elements, ctx);
717         else
718                 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
719                                         elements, ctx, data_offset, hd_len);
720         if (!rc) {
721                 card->stats.tx_packets++;
722                 card->stats.tx_bytes += tx_bytes;
723                 if (new_skb != skb)
724                         dev_kfree_skb_any(skb);
725                 if (card->options.performance_stats) {
726                         if (large_send != QETH_LARGE_SEND_NO) {
727                                 card->perf_stats.large_send_bytes += tx_bytes;
728                                 card->perf_stats.large_send_cnt++;
729                         }
730                         if (skb_shinfo(new_skb)->nr_frags > 0) {
731                                 card->perf_stats.sg_skbs_sent++;
732                                 /* nr_frags + skb->data */
733                                 card->perf_stats.sg_frags_sent +=
734                                         skb_shinfo(new_skb)->nr_frags + 1;
735                         }
736                 }
737
738                 if (ctx != NULL) {
739                         qeth_eddp_put_context(ctx);
740                         dev_kfree_skb_any(new_skb);
741                 }
742         } else {
743                 if (ctx != NULL)
744                         qeth_eddp_put_context(ctx);
745
746                 if (data_offset >= 0)
747                         kmem_cache_free(qeth_core_header_cache, hdr);
748
749                 if (rc == -EBUSY) {
750                         if (new_skb != skb)
751                                 dev_kfree_skb_any(new_skb);
752                         return NETDEV_TX_BUSY;
753                 } else
754                         goto tx_drop;
755         }
756
757         netif_wake_queue(dev);
758         if (card->options.performance_stats)
759                 card->perf_stats.outbound_time += qeth_get_micros() -
760                         card->perf_stats.outbound_start_time;
761         return rc;
762
763 tx_drop:
764         card->stats.tx_dropped++;
765         card->stats.tx_errors++;
766         if ((new_skb != skb) && new_skb)
767                 dev_kfree_skb_any(new_skb);
768         dev_kfree_skb_any(skb);
769         netif_wake_queue(dev);
770         return NETDEV_TX_OK;
771 }
772
773 static void qeth_l2_qdio_input_handler(struct ccw_device *ccwdev,
774                         unsigned int qdio_err, unsigned int queue,
775                         int first_element, int count, unsigned long card_ptr)
776 {
777         struct net_device *net_dev;
778         struct qeth_card *card;
779         struct qeth_qdio_buffer *buffer;
780         int index;
781         int i;
782
783         card = (struct qeth_card *) card_ptr;
784         net_dev = card->dev;
785         if (card->options.performance_stats) {
786                 card->perf_stats.inbound_cnt++;
787                 card->perf_stats.inbound_start_time = qeth_get_micros();
788         }
789         if (qdio_err & QDIO_ERROR_ACTIVATE_CHECK_CONDITION) {
790                 QETH_DBF_TEXT(TRACE, 1, "qdinchk");
791                 QETH_DBF_TEXT_(TRACE, 1, "%s", CARD_BUS_ID(card));
792                 QETH_DBF_TEXT_(TRACE, 1, "%04X%04X", first_element,
793                                 count);
794                 QETH_DBF_TEXT_(TRACE, 1, "%04X", queue);
795                 qeth_schedule_recovery(card);
796                 return;
797         }
798         for (i = first_element; i < (first_element + count); ++i) {
799                 index = i % QDIO_MAX_BUFFERS_PER_Q;
800                 buffer = &card->qdio.in_q->bufs[index];
801                 if (!(qdio_err &&
802                       qeth_check_qdio_errors(buffer->buffer, qdio_err, "qinerr")))
803                         qeth_l2_process_inbound_buffer(card, buffer, index);
804                 /* clear buffer and give back to hardware */
805                 qeth_put_buffer_pool_entry(card, buffer->pool_entry);
806                 qeth_queue_input_buffer(card, index);
807         }
808         if (card->options.performance_stats)
809                 card->perf_stats.inbound_time += qeth_get_micros() -
810                         card->perf_stats.inbound_start_time;
811 }
812
813 static int qeth_l2_open(struct net_device *dev)
814 {
815         struct qeth_card *card = dev->ml_priv;
816
817         QETH_DBF_TEXT(TRACE, 4, "qethopen");
818         if (card->state != CARD_STATE_SOFTSETUP)
819                 return -ENODEV;
820
821         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
822              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
823                 QETH_DBF_TEXT(TRACE, 4, "nomacadr");
824                 return -EPERM;
825         }
826         card->data.state = CH_STATE_UP;
827         card->state = CARD_STATE_UP;
828         card->dev->flags |= IFF_UP;
829         netif_start_queue(dev);
830
831         if (!card->lan_online && netif_carrier_ok(dev))
832                 netif_carrier_off(dev);
833         return 0;
834 }
835
836
837 static int qeth_l2_stop(struct net_device *dev)
838 {
839         struct qeth_card *card = dev->ml_priv;
840
841         QETH_DBF_TEXT(TRACE, 4, "qethstop");
842         netif_tx_disable(dev);
843         card->dev->flags &= ~IFF_UP;
844         if (card->state == CARD_STATE_UP)
845                 card->state = CARD_STATE_SOFTSETUP;
846         return 0;
847 }
848
849 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
850 {
851         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
852
853         INIT_LIST_HEAD(&card->vid_list);
854         INIT_LIST_HEAD(&card->mc_list);
855         card->options.layer2 = 1;
856         card->discipline.input_handler = (qdio_handler_t *)
857                 qeth_l2_qdio_input_handler;
858         card->discipline.output_handler = (qdio_handler_t *)
859                 qeth_qdio_output_handler;
860         card->discipline.recover = qeth_l2_recover;
861         return 0;
862 }
863
864 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
865 {
866         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
867
868         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
869
870         if (cgdev->state == CCWGROUP_ONLINE) {
871                 card->use_hard_stop = 1;
872                 qeth_l2_set_offline(cgdev);
873         }
874
875         if (card->dev) {
876                 unregister_netdev(card->dev);
877                 card->dev = NULL;
878         }
879
880         qeth_l2_del_all_mc(card);
881         return;
882 }
883
884 static int qeth_l2_ethtool_set_tso(struct net_device *dev, u32 data)
885 {
886         struct qeth_card *card = dev->ml_priv;
887
888         if (data) {
889                 if (card->options.large_send == QETH_LARGE_SEND_NO) {
890                         card->options.large_send = QETH_LARGE_SEND_EDDP;
891                         dev->features |= NETIF_F_TSO;
892                 }
893         } else {
894                 dev->features &= ~NETIF_F_TSO;
895                 card->options.large_send = QETH_LARGE_SEND_NO;
896         }
897         return 0;
898 }
899
900 static struct ethtool_ops qeth_l2_ethtool_ops = {
901         .get_link = ethtool_op_get_link,
902         .get_tx_csum = ethtool_op_get_tx_csum,
903         .set_tx_csum = ethtool_op_set_tx_hw_csum,
904         .get_sg = ethtool_op_get_sg,
905         .set_sg = ethtool_op_set_sg,
906         .get_tso = ethtool_op_get_tso,
907         .set_tso = qeth_l2_ethtool_set_tso,
908         .get_strings = qeth_core_get_strings,
909         .get_ethtool_stats = qeth_core_get_ethtool_stats,
910         .get_stats_count = qeth_core_get_stats_count,
911         .get_drvinfo = qeth_core_get_drvinfo,
912         .get_settings = qeth_core_ethtool_get_settings,
913 };
914
915 static struct ethtool_ops qeth_l2_osn_ops = {
916         .get_strings = qeth_core_get_strings,
917         .get_ethtool_stats = qeth_core_get_ethtool_stats,
918         .get_stats_count = qeth_core_get_stats_count,
919         .get_drvinfo = qeth_core_get_drvinfo,
920 };
921
922 static int qeth_l2_setup_netdev(struct qeth_card *card)
923 {
924         switch (card->info.type) {
925         case QETH_CARD_TYPE_OSAE:
926                 card->dev = alloc_etherdev(0);
927                 break;
928         case QETH_CARD_TYPE_IQD:
929                 card->dev = alloc_netdev(0, "hsi%d", ether_setup);
930                 break;
931         case QETH_CARD_TYPE_OSN:
932                 card->dev = alloc_netdev(0, "osn%d", ether_setup);
933                 card->dev->flags |= IFF_NOARP;
934                 break;
935         default:
936                 card->dev = alloc_etherdev(0);
937         }
938
939         if (!card->dev)
940                 return -ENODEV;
941
942         card->dev->ml_priv = card;
943         card->dev->tx_timeout = &qeth_tx_timeout;
944         card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
945         card->dev->open = qeth_l2_open;
946         card->dev->stop = qeth_l2_stop;
947         card->dev->hard_start_xmit = qeth_l2_hard_start_xmit;
948         card->dev->do_ioctl = qeth_l2_do_ioctl;
949         card->dev->get_stats = qeth_get_stats;
950         card->dev->change_mtu = qeth_change_mtu;
951         card->dev->set_multicast_list = qeth_l2_set_multicast_list;
952         card->dev->vlan_rx_kill_vid = qeth_l2_vlan_rx_kill_vid;
953         card->dev->vlan_rx_add_vid = qeth_l2_vlan_rx_add_vid;
954         card->dev->set_mac_address = qeth_l2_set_mac_address;
955         card->dev->mtu = card->info.initial_mtu;
956         if (card->info.type != QETH_CARD_TYPE_OSN)
957                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_ethtool_ops);
958         else
959                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_osn_ops);
960         card->dev->features |= NETIF_F_HW_VLAN_FILTER;
961         card->info.broadcast_capable = 1;
962         qeth_l2_request_initial_mac(card);
963         SET_NETDEV_DEV(card->dev, &card->gdev->dev);
964         return register_netdev(card->dev);
965 }
966
967 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
968 {
969         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
970         int rc = 0;
971         enum qeth_card_states recover_flag;
972
973         BUG_ON(!card);
974         QETH_DBF_TEXT(SETUP, 2, "setonlin");
975         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
976
977         qeth_set_allowed_threads(card, QETH_RECOVER_THREAD, 1);
978         if (qeth_wait_for_threads(card, ~QETH_RECOVER_THREAD)) {
979                 PRINT_WARN("set_online of card %s interrupted by user!\n",
980                            CARD_BUS_ID(card));
981                 return -ERESTARTSYS;
982         }
983
984         recover_flag = card->state;
985         rc = ccw_device_set_online(CARD_RDEV(card));
986         if (rc) {
987                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
988                 return -EIO;
989         }
990         rc = ccw_device_set_online(CARD_WDEV(card));
991         if (rc) {
992                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
993                 return -EIO;
994         }
995         rc = ccw_device_set_online(CARD_DDEV(card));
996         if (rc) {
997                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
998                 return -EIO;
999         }
1000
1001         rc = qeth_core_hardsetup_card(card);
1002         if (rc) {
1003                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
1004                 goto out_remove;
1005         }
1006
1007         if (!card->dev && qeth_l2_setup_netdev(card))
1008                 goto out_remove;
1009
1010         if (card->info.type != QETH_CARD_TYPE_OSN)
1011                 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
1012
1013         card->state = CARD_STATE_HARDSETUP;
1014         qeth_print_status_message(card);
1015
1016         /* softsetup */
1017         QETH_DBF_TEXT(SETUP, 2, "softsetp");
1018
1019         rc = qeth_send_startlan(card);
1020         if (rc) {
1021                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1022                 if (rc == 0xe080) {
1023                         PRINT_WARN("LAN on card %s if offline! "
1024                                    "Waiting for STARTLAN from card.\n",
1025                                    CARD_BUS_ID(card));
1026                         card->lan_online = 0;
1027                 }
1028                 return rc;
1029         } else
1030                 card->lan_online = 1;
1031
1032         if (card->info.type != QETH_CARD_TYPE_OSN) {
1033                 qeth_set_large_send(card, card->options.large_send);
1034                 qeth_l2_process_vlans(card, 0);
1035         }
1036
1037         netif_tx_disable(card->dev);
1038
1039         rc = qeth_init_qdio_queues(card);
1040         if (rc) {
1041                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1042                 goto out_remove;
1043         }
1044         card->state = CARD_STATE_SOFTSETUP;
1045         netif_carrier_on(card->dev);
1046
1047         qeth_set_allowed_threads(card, 0xffffffff, 0);
1048         if (recover_flag == CARD_STATE_RECOVER) {
1049                 if (recovery_mode &&
1050                     card->info.type != QETH_CARD_TYPE_OSN) {
1051                         qeth_l2_open(card->dev);
1052                 } else {
1053                         rtnl_lock();
1054                         dev_open(card->dev);
1055                         rtnl_unlock();
1056                 }
1057                 /* this also sets saved unicast addresses */
1058                 qeth_l2_set_multicast_list(card->dev);
1059         }
1060         /* let user_space know that device is online */
1061         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1062         return 0;
1063 out_remove:
1064         card->use_hard_stop = 1;
1065         qeth_l2_stop_card(card, 0);
1066         ccw_device_set_offline(CARD_DDEV(card));
1067         ccw_device_set_offline(CARD_WDEV(card));
1068         ccw_device_set_offline(CARD_RDEV(card));
1069         if (recover_flag == CARD_STATE_RECOVER)
1070                 card->state = CARD_STATE_RECOVER;
1071         else
1072                 card->state = CARD_STATE_DOWN;
1073         return -ENODEV;
1074 }
1075
1076 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1077 {
1078         return __qeth_l2_set_online(gdev, 0);
1079 }
1080
1081 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1082                                         int recovery_mode)
1083 {
1084         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1085         int rc = 0, rc2 = 0, rc3 = 0;
1086         enum qeth_card_states recover_flag;
1087
1088         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1089         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1090
1091         if (card->dev && netif_carrier_ok(card->dev))
1092                 netif_carrier_off(card->dev);
1093         recover_flag = card->state;
1094         if (qeth_l2_stop_card(card, recovery_mode) == -ERESTARTSYS) {
1095                 PRINT_WARN("Stopping card %s interrupted by user!\n",
1096                            CARD_BUS_ID(card));
1097                 return -ERESTARTSYS;
1098         }
1099         rc  = ccw_device_set_offline(CARD_DDEV(card));
1100         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1101         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1102         if (!rc)
1103                 rc = (rc2) ? rc2 : rc3;
1104         if (rc)
1105                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1106         if (recover_flag == CARD_STATE_UP)
1107                 card->state = CARD_STATE_RECOVER;
1108         /* let user_space know that device is offline */
1109         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1110         return 0;
1111 }
1112
1113 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1114 {
1115         return __qeth_l2_set_offline(cgdev, 0);
1116 }
1117
1118 static int qeth_l2_recover(void *ptr)
1119 {
1120         struct qeth_card *card;
1121         int rc = 0;
1122
1123         card = (struct qeth_card *) ptr;
1124         QETH_DBF_TEXT(TRACE, 2, "recover1");
1125         QETH_DBF_HEX(TRACE, 2, &card, sizeof(void *));
1126         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1127                 return 0;
1128         QETH_DBF_TEXT(TRACE, 2, "recover2");
1129         PRINT_WARN("Recovery of device %s started ...\n",
1130                    CARD_BUS_ID(card));
1131         card->use_hard_stop = 1;
1132         __qeth_l2_set_offline(card->gdev, 1);
1133         rc = __qeth_l2_set_online(card->gdev, 1);
1134         /* don't run another scheduled recovery */
1135         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1136         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1137         if (!rc)
1138                 PRINT_INFO("Device %s successfully recovered!\n",
1139                            CARD_BUS_ID(card));
1140         else
1141                 PRINT_INFO("Device %s could not be recovered!\n",
1142                            CARD_BUS_ID(card));
1143         return 0;
1144 }
1145
1146 static int __init qeth_l2_init(void)
1147 {
1148         PRINT_INFO("register layer 2 discipline\n");
1149         return 0;
1150 }
1151
1152 static void __exit qeth_l2_exit(void)
1153 {
1154         PRINT_INFO("unregister layer 2 discipline\n");
1155 }
1156
1157 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1158 {
1159         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1160         qeth_qdio_clear_card(card, 0);
1161         qeth_clear_qdio_buffers(card);
1162 }
1163
1164 struct ccwgroup_driver qeth_l2_ccwgroup_driver = {
1165         .probe = qeth_l2_probe_device,
1166         .remove = qeth_l2_remove_device,
1167         .set_online = qeth_l2_set_online,
1168         .set_offline = qeth_l2_set_offline,
1169         .shutdown = qeth_l2_shutdown,
1170 };
1171 EXPORT_SYMBOL_GPL(qeth_l2_ccwgroup_driver);
1172
1173 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1174                            struct qeth_cmd_buffer *iob)
1175 {
1176         unsigned long flags;
1177         int rc = 0;
1178
1179         QETH_DBF_TEXT(TRACE, 5, "osndctrd");
1180
1181         wait_event(card->wait_q,
1182                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1183         qeth_prepare_control_data(card, len, iob);
1184         QETH_DBF_TEXT(TRACE, 6, "osnoirqp");
1185         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1186         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1187                               (addr_t) iob, 0, 0);
1188         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1189         if (rc) {
1190                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1191                            "ccw_device_start rc = %i\n", rc);
1192                 QETH_DBF_TEXT_(TRACE, 2, " err%d", rc);
1193                 qeth_release_buffer(iob->channel, iob);
1194                 atomic_set(&card->write.irq_pending, 0);
1195                 wake_up(&card->wait_q);
1196         }
1197         return rc;
1198 }
1199
1200 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1201                         struct qeth_cmd_buffer *iob, int data_len)
1202 {
1203         u16 s1, s2;
1204
1205         QETH_DBF_TEXT(TRACE, 4, "osndipa");
1206
1207         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1208         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1209         s2 = (u16)data_len;
1210         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1211         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1212         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1213         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1214         return qeth_osn_send_control_data(card, s1, iob);
1215 }
1216
1217 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1218 {
1219         struct qeth_cmd_buffer *iob;
1220         struct qeth_card *card;
1221         int rc;
1222
1223         QETH_DBF_TEXT(TRACE, 2, "osnsdmc");
1224         if (!dev)
1225                 return -ENODEV;
1226         card = dev->ml_priv;
1227         if (!card)
1228                 return -ENODEV;
1229         if ((card->state != CARD_STATE_UP) &&
1230             (card->state != CARD_STATE_SOFTSETUP))
1231                 return -ENODEV;
1232         iob = qeth_wait_for_buffer(&card->write);
1233         memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1234         rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1235         return rc;
1236 }
1237 EXPORT_SYMBOL(qeth_osn_assist);
1238
1239 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1240                   int (*assist_cb)(struct net_device *, void *),
1241                   int (*data_cb)(struct sk_buff *))
1242 {
1243         struct qeth_card *card;
1244
1245         QETH_DBF_TEXT(TRACE, 2, "osnreg");
1246         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1247         if (*dev == NULL)
1248                 return -ENODEV;
1249         card = (*dev)->ml_priv;
1250         if (!card)
1251                 return -ENODEV;
1252         if ((assist_cb == NULL) || (data_cb == NULL))
1253                 return -EINVAL;
1254         card->osn_info.assist_cb = assist_cb;
1255         card->osn_info.data_cb = data_cb;
1256         return 0;
1257 }
1258 EXPORT_SYMBOL(qeth_osn_register);
1259
1260 void qeth_osn_deregister(struct net_device *dev)
1261 {
1262         struct qeth_card *card;
1263
1264         QETH_DBF_TEXT(TRACE, 2, "osndereg");
1265         if (!dev)
1266                 return;
1267         card = dev->ml_priv;
1268         if (!card)
1269                 return;
1270         card->osn_info.assist_cb = NULL;
1271         card->osn_info.data_cb = NULL;
1272         return;
1273 }
1274 EXPORT_SYMBOL(qeth_osn_deregister);
1275
1276 module_init(qeth_l2_init);
1277 module_exit(qeth_l2_exit);
1278 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1279 MODULE_DESCRIPTION("qeth layer 2 discipline");
1280 MODULE_LICENSE("GPL");