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This client driver allows you to use a GPIO pin as a source for PPS
[linux-2.6/next.git] / drivers / s390 / net / qeth_l2_main.c
bloba21ae3d549db1bce13b124aea664b14ac8bef525
1 /*
2 * drivers/s390/net/qeth_l2_main.c
3 *
4 * Copyright IBM Corp. 2007, 2009
5 * Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
6 * Frank Pavlic <fpavlic@de.ibm.com>,
7 * Thomas Spatzier <tspat@de.ibm.com>,
8 * Frank Blaschka <frank.blaschka@de.ibm.com>
9 */
10
11 #define KMSG_COMPONENT "qeth"
12 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
13
14 #include <linux/module.h>
15 #include <linux/moduleparam.h>
16 #include <linux/string.h>
17 #include <linux/errno.h>
18 #include <linux/kernel.h>
19 #include <linux/slab.h>
20 #include <linux/etherdevice.h>
21 #include <linux/mii.h>
22 #include <linux/ip.h>
23 #include <linux/list.h>
24
25 #include "qeth_core.h"
26
27 static int qeth_l2_set_offline(struct ccwgroup_device *);
28 static int qeth_l2_stop(struct net_device *);
29 static int qeth_l2_send_delmac(struct qeth_card *, __u8 *);
30 static int qeth_l2_send_setdelmac(struct qeth_card *, __u8 *,
31 enum qeth_ipa_cmds,
32 int (*reply_cb) (struct qeth_card *,
33 struct qeth_reply*,
34 unsigned long));
35 static void qeth_l2_set_multicast_list(struct net_device *);
36 static int qeth_l2_recover(void *);
37
38 static int qeth_l2_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
39 {
40 struct qeth_card *card = dev->ml_priv;
41 struct mii_ioctl_data *mii_data;
42 int rc = 0;
43
44 if (!card)
45 return -ENODEV;
46
47 if ((card->state != CARD_STATE_UP) &&
48 (card->state != CARD_STATE_SOFTSETUP))
49 return -ENODEV;
50
51 if (card->info.type == QETH_CARD_TYPE_OSN)
52 return -EPERM;
53
54 switch (cmd) {
55 case SIOC_QETH_ADP_SET_SNMP_CONTROL:
56 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
57 break;
58 case SIOC_QETH_GET_CARD_TYPE:
59 if ((card->info.type == QETH_CARD_TYPE_OSD ||
60 card->info.type == QETH_CARD_TYPE_OSM ||
61 card->info.type == QETH_CARD_TYPE_OSX) &&
62 !card->info.guestlan)
63 return 1;
64 return 0;
65 break;
66 case SIOCGMIIPHY:
67 mii_data = if_mii(rq);
68 mii_data->phy_id = 0;
69 break;
70 case SIOCGMIIREG:
71 mii_data = if_mii(rq);
72 if (mii_data->phy_id != 0)
73 rc = -EINVAL;
74 else
75 mii_data->val_out = qeth_mdio_read(dev,
76 mii_data->phy_id, mii_data->reg_num);
77 break;
78 default:
79 rc = -EOPNOTSUPP;
80 }
81 if (rc)
82 QETH_CARD_TEXT_(card, 2, "ioce%d", rc);
83 return rc;
84 }
85
86 static int qeth_l2_verify_dev(struct net_device *dev)
87 {
88 struct qeth_card *card;
89 unsigned long flags;
90 int rc = 0;
91
92 read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
93 list_for_each_entry(card, &qeth_core_card_list.list, list) {
94 if (card->dev == dev) {
95 rc = QETH_REAL_CARD;
96 break;
97 }
98 }
99 read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
100
101 return rc;
102 }
103
104 static struct net_device *qeth_l2_netdev_by_devno(unsigned char *read_dev_no)
105 {
106 struct qeth_card *card;
107 struct net_device *ndev;
108 __u16 temp_dev_no;
109 unsigned long flags;
110 struct ccw_dev_id read_devid;
111
112 ndev = NULL;
113 memcpy(&temp_dev_no, read_dev_no, 2);
114 read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
115 list_for_each_entry(card, &qeth_core_card_list.list, list) {
116 ccw_device_get_id(CARD_RDEV(card), &read_devid);
117 if (read_devid.devno == temp_dev_no) {
118 ndev = card->dev;
119 break;
120 }
121 }
122 read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
123 return ndev;
124 }
125
126 static int qeth_l2_send_setgroupmac_cb(struct qeth_card *card,
127 struct qeth_reply *reply,
128 unsigned long data)
129 {
130 struct qeth_ipa_cmd *cmd;
131 __u8 *mac;
132
133 QETH_CARD_TEXT(card, 2, "L2Sgmacb");
134 cmd = (struct qeth_ipa_cmd *) data;
135 mac = &cmd->data.setdelmac.mac[0];
136 /* MAC already registered, needed in couple/uncouple case */
137 if (cmd->hdr.return_code == IPA_RC_L2_DUP_MAC) {
138 QETH_DBF_MESSAGE(2, "Group MAC %pM already existing on %s \n",
139 mac, QETH_CARD_IFNAME(card));
140 cmd->hdr.return_code = 0;
141 }
142 if (cmd->hdr.return_code)
143 QETH_DBF_MESSAGE(2, "Could not set group MAC %pM on %s: %x\n",
144 mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code);
145 return 0;
146 }
147
148 static int qeth_l2_send_setgroupmac(struct qeth_card *card, __u8 *mac)
149 {
150 QETH_CARD_TEXT(card, 2, "L2Sgmac");
151 return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETGMAC,
152 qeth_l2_send_setgroupmac_cb);
153 }
154
155 static int qeth_l2_send_delgroupmac_cb(struct qeth_card *card,
156 struct qeth_reply *reply,
157 unsigned long data)
158 {
159 struct qeth_ipa_cmd *cmd;
160 __u8 *mac;
161
162 QETH_CARD_TEXT(card, 2, "L2Dgmacb");
163 cmd = (struct qeth_ipa_cmd *) data;
164 mac = &cmd->data.setdelmac.mac[0];
165 if (cmd->hdr.return_code)
166 QETH_DBF_MESSAGE(2, "Could not delete group MAC %pM on %s: %x\n",
167 mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code);
168 return 0;
169 }
170
171 static int qeth_l2_send_delgroupmac(struct qeth_card *card, __u8 *mac)
172 {
173 QETH_CARD_TEXT(card, 2, "L2Dgmac");
174 return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELGMAC,
175 qeth_l2_send_delgroupmac_cb);
176 }
177
178 static void qeth_l2_add_mc(struct qeth_card *card, __u8 *mac, int vmac)
179 {
180 struct qeth_mc_mac *mc;
181 int rc;
182
183 mc = kmalloc(sizeof(struct qeth_mc_mac), GFP_ATOMIC);
184
185 if (!mc)
186 return;
187
188 memcpy(mc->mc_addr, mac, OSA_ADDR_LEN);
189 mc->mc_addrlen = OSA_ADDR_LEN;
190 mc->is_vmac = vmac;
191
192 if (vmac) {
193 rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
194 NULL);
195 } else {
196 rc = qeth_l2_send_setgroupmac(card, mac);
197 }
198
199 if (!rc)
200 list_add_tail(&mc->list, &card->mc_list);
201 else
202 kfree(mc);
203 }
204
205 static void qeth_l2_del_all_mc(struct qeth_card *card, int del)
206 {
207 struct qeth_mc_mac *mc, *tmp;
208
209 spin_lock_bh(&card->mclock);
210 list_for_each_entry_safe(mc, tmp, &card->mc_list, list) {
211 if (del) {
212 if (mc->is_vmac)
213 qeth_l2_send_setdelmac(card, mc->mc_addr,
214 IPA_CMD_DELVMAC, NULL);
215 else
216 qeth_l2_send_delgroupmac(card, mc->mc_addr);
217 }
218 list_del(&mc->list);
219 kfree(mc);
220 }
221 spin_unlock_bh(&card->mclock);
222 }
223
224 static inline int qeth_l2_get_cast_type(struct qeth_card *card,
225 struct sk_buff *skb)
226 {
227 if (card->info.type == QETH_CARD_TYPE_OSN)
228 return RTN_UNSPEC;
229 if (is_broadcast_ether_addr(skb->data))
230 return RTN_BROADCAST;
231 if (is_multicast_ether_addr(skb->data))
232 return RTN_MULTICAST;
233 return RTN_UNSPEC;
234 }
235
236 static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
237 struct sk_buff *skb, int ipv, int cast_type)
238 {
239 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
240
241 memset(hdr, 0, sizeof(struct qeth_hdr));
242 hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
243
244 /* set byte byte 3 to casting flags */
245 if (cast_type == RTN_MULTICAST)
246 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
247 else if (cast_type == RTN_BROADCAST)
248 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
249 else
250 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
251
252 hdr->hdr.l2.pkt_length = skb->len-QETH_HEADER_SIZE;
253 /* VSWITCH relies on the VLAN
254 * information to be present in
255 * the QDIO header */
256 if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
257 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
258 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
259 }
260 }
261
262 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
263 struct qeth_reply *reply, unsigned long data)
264 {
265 struct qeth_ipa_cmd *cmd;
266
267 QETH_CARD_TEXT(card, 2, "L2sdvcb");
268 cmd = (struct qeth_ipa_cmd *) data;
269 if (cmd->hdr.return_code) {
270 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x. "
271 "Continuing\n", cmd->data.setdelvlan.vlan_id,
272 QETH_CARD_IFNAME(card), cmd->hdr.return_code);
273 QETH_CARD_TEXT_(card, 2, "L2VL%4x", cmd->hdr.command);
274 QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code);
275 }
276 return 0;
277 }
278
279 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
280 enum qeth_ipa_cmds ipacmd)
281 {
282 struct qeth_ipa_cmd *cmd;
283 struct qeth_cmd_buffer *iob;
284
285 QETH_CARD_TEXT_(card, 4, "L2sdv%x", ipacmd);
286 iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
287 cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
288 cmd->data.setdelvlan.vlan_id = i;
289 return qeth_send_ipa_cmd(card, iob,
290 qeth_l2_send_setdelvlan_cb, NULL);
291 }
292
293 static void qeth_l2_process_vlans(struct qeth_card *card)
294 {
295 struct qeth_vlan_vid *id;
296 QETH_CARD_TEXT(card, 3, "L2prcvln");
297 spin_lock_bh(&card->vlanlock);
298 list_for_each_entry(id, &card->vid_list, list) {
299 qeth_l2_send_setdelvlan(card, id->vid, IPA_CMD_SETVLAN);
300 }
301 spin_unlock_bh(&card->vlanlock);
302 }
303
304 static void qeth_l2_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
305 {
306 struct qeth_card *card = dev->ml_priv;
307 struct qeth_vlan_vid *id;
308
309 QETH_CARD_TEXT_(card, 4, "aid:%d", vid);
310 if (!vid)
311 return;
312 if (card->info.type == QETH_CARD_TYPE_OSM) {
313 QETH_CARD_TEXT(card, 3, "aidOSM");
314 return;
315 }
316 if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
317 QETH_CARD_TEXT(card, 3, "aidREC");
318 return;
319 }
320 id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
321 if (id) {
322 id->vid = vid;
323 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
324 spin_lock_bh(&card->vlanlock);
325 list_add_tail(&id->list, &card->vid_list);
326 spin_unlock_bh(&card->vlanlock);
327 }
328 }
329
330 static void qeth_l2_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
331 {
332 struct qeth_vlan_vid *id, *tmpid = NULL;
333 struct qeth_card *card = dev->ml_priv;
334
335 QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
336 if (card->info.type == QETH_CARD_TYPE_OSM) {
337 QETH_CARD_TEXT(card, 3, "kidOSM");
338 return;
339 }
340 if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
341 QETH_CARD_TEXT(card, 3, "kidREC");
342 return;
343 }
344 spin_lock_bh(&card->vlanlock);
345 list_for_each_entry(id, &card->vid_list, list) {
346 if (id->vid == vid) {
347 list_del(&id->list);
348 tmpid = id;
349 break;
350 }
351 }
352 spin_unlock_bh(&card->vlanlock);
353 if (tmpid) {
354 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
355 kfree(tmpid);
356 }
357 qeth_l2_set_multicast_list(card->dev);
358 }
359
360 static int qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
361 {
362 int rc = 0;
363
364 QETH_DBF_TEXT(SETUP , 2, "stopcard");
365 QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
366
367 qeth_set_allowed_threads(card, 0, 1);
368 if (card->read.state == CH_STATE_UP &&
369 card->write.state == CH_STATE_UP &&
370 (card->state == CARD_STATE_UP)) {
371 if (recovery_mode &&
372 card->info.type != QETH_CARD_TYPE_OSN) {
373 qeth_l2_stop(card->dev);
374 } else {
375 rtnl_lock();
376 dev_close(card->dev);
377 rtnl_unlock();
378 }
379 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
380 card->state = CARD_STATE_SOFTSETUP;
381 }
382 if (card->state == CARD_STATE_SOFTSETUP) {
383 qeth_l2_del_all_mc(card, 0);
384 qeth_clear_ipacmd_list(card);
385 card->state = CARD_STATE_HARDSETUP;
386 }
387 if (card->state == CARD_STATE_HARDSETUP) {
388 qeth_qdio_clear_card(card, 0);
389 qeth_clear_qdio_buffers(card);
390 qeth_clear_working_pool_list(card);
391 card->state = CARD_STATE_DOWN;
392 }
393 if (card->state == CARD_STATE_DOWN) {
394 qeth_clear_cmd_buffers(&card->read);
395 qeth_clear_cmd_buffers(&card->write);
396 }
397 return rc;
398 }
399
400 static int qeth_l2_process_inbound_buffer(struct qeth_card *card,
401 int budget, int *done)
402 {
403 int work_done = 0;
404 struct sk_buff *skb;
405 struct qeth_hdr *hdr;
406 unsigned int len;
407
408 *done = 0;
409 BUG_ON(!budget);
410 while (budget) {
411 skb = qeth_core_get_next_skb(card,
412 &card->qdio.in_q->bufs[card->rx.b_index],
413 &card->rx.b_element, &card->rx.e_offset, &hdr);
414 if (!skb) {
415 *done = 1;
416 break;
417 }
418 skb->dev = card->dev;
419 switch (hdr->hdr.l2.id) {
420 case QETH_HEADER_TYPE_LAYER2:
421 skb->pkt_type = PACKET_HOST;
422 skb->protocol = eth_type_trans(skb, skb->dev);
423 skb->ip_summed = CHECKSUM_NONE;
424 if (skb->protocol == htons(ETH_P_802_2))
425 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
426 len = skb->len;
427 netif_receive_skb(skb);
428 break;
429 case QETH_HEADER_TYPE_OSN:
430 if (card->info.type == QETH_CARD_TYPE_OSN) {
431 skb_push(skb, sizeof(struct qeth_hdr));
432 skb_copy_to_linear_data(skb, hdr,
433 sizeof(struct qeth_hdr));
434 len = skb->len;
435 card->osn_info.data_cb(skb);
436 break;
437 }
438 /* else unknown */
439 default:
440 dev_kfree_skb_any(skb);
441 QETH_CARD_TEXT(card, 3, "inbunkno");
442 QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
443 continue;
444 }
445 work_done++;
446 budget--;
447 card->stats.rx_packets++;
448 card->stats.rx_bytes += len;
449 }
450 return work_done;
451 }
452
453 static int qeth_l2_poll(struct napi_struct *napi, int budget)
454 {
455 struct qeth_card *card = container_of(napi, struct qeth_card, napi);
456 int work_done = 0;
457 struct qeth_qdio_buffer *buffer;
458 int done;
459 int new_budget = budget;
460
461 if (card->options.performance_stats) {
462 card->perf_stats.inbound_cnt++;
463 card->perf_stats.inbound_start_time = qeth_get_micros();
464 }
465
466 while (1) {
467 if (!card->rx.b_count) {
468 card->rx.qdio_err = 0;
469 card->rx.b_count = qdio_get_next_buffers(
470 card->data.ccwdev, 0, &card->rx.b_index,
471 &card->rx.qdio_err);
472 if (card->rx.b_count <= 0) {
473 card->rx.b_count = 0;
474 break;
475 }
476 card->rx.b_element =
477 &card->qdio.in_q->bufs[card->rx.b_index]
478 .buffer->element[0];
479 card->rx.e_offset = 0;
480 }
481
482 while (card->rx.b_count) {
483 buffer = &card->qdio.in_q->bufs[card->rx.b_index];
484 if (!(card->rx.qdio_err &&
485 qeth_check_qdio_errors(card, buffer->buffer,
486 card->rx.qdio_err, "qinerr")))
487 work_done += qeth_l2_process_inbound_buffer(
488 card, new_budget, &done);
489 else
490 done = 1;
491
492 if (done) {
493 if (card->options.performance_stats)
494 card->perf_stats.bufs_rec++;
495 qeth_put_buffer_pool_entry(card,
496 buffer->pool_entry);
497 qeth_queue_input_buffer(card, card->rx.b_index);
498 card->rx.b_count--;
499 if (card->rx.b_count) {
500 card->rx.b_index =
501 (card->rx.b_index + 1) %
502 QDIO_MAX_BUFFERS_PER_Q;
503 card->rx.b_element =
504 &card->qdio.in_q
505 ->bufs[card->rx.b_index]
506 .buffer->element[0];
507 card->rx.e_offset = 0;
508 }
509 }
510
511 if (work_done >= budget)
512 goto out;
513 else
514 new_budget = budget - work_done;
515 }
516 }
517
518 napi_complete(napi);
519 if (qdio_start_irq(card->data.ccwdev, 0))
520 napi_schedule(&card->napi);
521 out:
522 if (card->options.performance_stats)
523 card->perf_stats.inbound_time += qeth_get_micros() -
524 card->perf_stats.inbound_start_time;
525 return work_done;
526 }
527
528 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
529 enum qeth_ipa_cmds ipacmd,
530 int (*reply_cb) (struct qeth_card *,
531 struct qeth_reply*,
532 unsigned long))
533 {
534 struct qeth_ipa_cmd *cmd;
535 struct qeth_cmd_buffer *iob;
536
537 QETH_CARD_TEXT(card, 2, "L2sdmac");
538 iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
539 cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
540 cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
541 memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
542 return qeth_send_ipa_cmd(card, iob, reply_cb, NULL);
543 }
544
545 static int qeth_l2_send_setmac_cb(struct qeth_card *card,
546 struct qeth_reply *reply,
547 unsigned long data)
548 {
549 struct qeth_ipa_cmd *cmd;
550
551 QETH_CARD_TEXT(card, 2, "L2Smaccb");
552 cmd = (struct qeth_ipa_cmd *) data;
553 if (cmd->hdr.return_code) {
554 QETH_CARD_TEXT_(card, 2, "L2er%x", cmd->hdr.return_code);
555 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
556 switch (cmd->hdr.return_code) {
557 case IPA_RC_L2_DUP_MAC:
558 case IPA_RC_L2_DUP_LAYER3_MAC:
559 dev_warn(&card->gdev->dev,
560 "MAC address %pM already exists\n",
561 cmd->data.setdelmac.mac);
562 break;
563 case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
564 case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
565 dev_warn(&card->gdev->dev,
566 "MAC address %pM is not authorized\n",
567 cmd->data.setdelmac.mac);
568 break;
569 default:
570 break;
571 }
572 cmd->hdr.return_code = -EIO;
573 } else {
574 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
575 memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac,
576 OSA_ADDR_LEN);
577 dev_info(&card->gdev->dev,
578 "MAC address %pM successfully registered on device %s\n",
579 card->dev->dev_addr, card->dev->name);
580 }
581 return 0;
582 }
583
584 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
585 {
586 QETH_CARD_TEXT(card, 2, "L2Setmac");
587 return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
588 qeth_l2_send_setmac_cb);
589 }
590
591 static int qeth_l2_send_delmac_cb(struct qeth_card *card,
592 struct qeth_reply *reply,
593 unsigned long data)
594 {
595 struct qeth_ipa_cmd *cmd;
596
597 QETH_CARD_TEXT(card, 2, "L2Dmaccb");
598 cmd = (struct qeth_ipa_cmd *) data;
599 if (cmd->hdr.return_code) {
600 QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code);
601 cmd->hdr.return_code = -EIO;
602 return 0;
603 }
604 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
605
606 return 0;
607 }
608
609 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
610 {
611 QETH_CARD_TEXT(card, 2, "L2Delmac");
612 if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
613 return 0;
614 return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC,
615 qeth_l2_send_delmac_cb);
616 }
617
618 static int qeth_l2_request_initial_mac(struct qeth_card *card)
619 {
620 int rc = 0;
621 char vendor_pre[] = {0x02, 0x00, 0x00};
622
623 QETH_DBF_TEXT(SETUP, 2, "doL2init");
624 QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
625
626 rc = qeth_query_setadapterparms(card);
627 if (rc) {
628 QETH_DBF_MESSAGE(2, "could not query adapter parameters on "
629 "device %s: x%x\n", CARD_BUS_ID(card), rc);
630 }
631
632 if (card->info.type == QETH_CARD_TYPE_IQD ||
633 card->info.type == QETH_CARD_TYPE_OSM ||
634 card->info.type == QETH_CARD_TYPE_OSX ||
635 card->info.guestlan) {
636 rc = qeth_setadpparms_change_macaddr(card);
637 if (rc) {
638 QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
639 "device %s: x%x\n", CARD_BUS_ID(card), rc);
640 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
641 return rc;
642 }
643 QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN);
644 } else {
645 random_ether_addr(card->dev->dev_addr);
646 memcpy(card->dev->dev_addr, vendor_pre, 3);
647 }
648 return 0;
649 }
650
651 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
652 {
653 struct sockaddr *addr = p;
654 struct qeth_card *card = dev->ml_priv;
655 int rc = 0;
656
657 QETH_CARD_TEXT(card, 3, "setmac");
658
659 if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
660 QETH_CARD_TEXT(card, 3, "setmcINV");
661 return -EOPNOTSUPP;
662 }
663
664 if (card->info.type == QETH_CARD_TYPE_OSN ||
665 card->info.type == QETH_CARD_TYPE_OSM ||
666 card->info.type == QETH_CARD_TYPE_OSX) {
667 QETH_CARD_TEXT(card, 3, "setmcTYP");
668 return -EOPNOTSUPP;
669 }
670 QETH_CARD_HEX(card, 3, addr->sa_data, OSA_ADDR_LEN);
671 if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
672 QETH_CARD_TEXT(card, 3, "setmcREC");
673 return -ERESTARTSYS;
674 }
675 rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
676 if (!rc)
677 rc = qeth_l2_send_setmac(card, addr->sa_data);
678 return rc;
679 }
680
681 static void qeth_l2_set_multicast_list(struct net_device *dev)
682 {
683 struct qeth_card *card = dev->ml_priv;
684 struct netdev_hw_addr *ha;
685
686 if (card->info.type == QETH_CARD_TYPE_OSN)
687 return ;
688
689 QETH_CARD_TEXT(card, 3, "setmulti");
690 if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
691 (card->state != CARD_STATE_UP))
692 return;
693 qeth_l2_del_all_mc(card, 1);
694 spin_lock_bh(&card->mclock);
695 netdev_for_each_mc_addr(ha, dev)
696 qeth_l2_add_mc(card, ha->addr, 0);
697
698 netdev_for_each_uc_addr(ha, dev)
699 qeth_l2_add_mc(card, ha->addr, 1);
700
701 spin_unlock_bh(&card->mclock);
702 if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
703 return;
704 qeth_setadp_promisc_mode(card);
705 }
706
707 static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
708 {
709 int rc;
710 struct qeth_hdr *hdr = NULL;
711 int elements = 0;
712 struct qeth_card *card = dev->ml_priv;
713 struct sk_buff *new_skb = skb;
714 int ipv = qeth_get_ip_version(skb);
715 int cast_type = qeth_l2_get_cast_type(card, skb);
716 struct qeth_qdio_out_q *queue = card->qdio.out_qs
717 [qeth_get_priority_queue(card, skb, ipv, cast_type)];
718 int tx_bytes = skb->len;
719 int data_offset = -1;
720 int elements_needed = 0;
721 int hd_len = 0;
722
723 if ((card->state != CARD_STATE_UP) || !card->lan_online) {
724 card->stats.tx_carrier_errors++;
725 goto tx_drop;
726 }
727
728 if ((card->info.type == QETH_CARD_TYPE_OSN) &&
729 (skb->protocol == htons(ETH_P_IPV6)))
730 goto tx_drop;
731
732 if (card->options.performance_stats) {
733 card->perf_stats.outbound_cnt++;
734 card->perf_stats.outbound_start_time = qeth_get_micros();
735 }
736 netif_stop_queue(dev);
737
738 if (card->info.type == QETH_CARD_TYPE_OSN)
739 hdr = (struct qeth_hdr *)skb->data;
740 else {
741 if (card->info.type == QETH_CARD_TYPE_IQD) {
742 new_skb = skb;
743 data_offset = ETH_HLEN;
744 hd_len = ETH_HLEN;
745 hdr = kmem_cache_alloc(qeth_core_header_cache,
746 GFP_ATOMIC);
747 if (!hdr)
748 goto tx_drop;
749 elements_needed++;
750 skb_reset_mac_header(new_skb);
751 qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
752 hdr->hdr.l2.pkt_length = new_skb->len;
753 memcpy(((char *)hdr) + sizeof(struct qeth_hdr),
754 skb_mac_header(new_skb), ETH_HLEN);
755 } else {
756 /* create a clone with writeable headroom */
757 new_skb = skb_realloc_headroom(skb,
758 sizeof(struct qeth_hdr));
759 if (!new_skb)
760 goto tx_drop;
761 hdr = (struct qeth_hdr *)skb_push(new_skb,
762 sizeof(struct qeth_hdr));
763 skb_set_mac_header(new_skb, sizeof(struct qeth_hdr));
764 qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
765 }
766 }
767
768 elements = qeth_get_elements_no(card, (void *)hdr, new_skb,
769 elements_needed);
770 if (!elements) {
771 if (data_offset >= 0)
772 kmem_cache_free(qeth_core_header_cache, hdr);
773 goto tx_drop;
774 }
775
776 if (card->info.type != QETH_CARD_TYPE_IQD) {
777 if (qeth_hdr_chk_and_bounce(new_skb,
778 sizeof(struct qeth_hdr_layer2)))
779 goto tx_drop;
780 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
781 elements);
782 } else
783 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
784 elements, data_offset, hd_len);
785 if (!rc) {
786 card->stats.tx_packets++;
787 card->stats.tx_bytes += tx_bytes;
788 if (new_skb != skb)
789 dev_kfree_skb_any(skb);
790 rc = NETDEV_TX_OK;
791 } else {
792 if (data_offset >= 0)
793 kmem_cache_free(qeth_core_header_cache, hdr);
794
795 if (rc == -EBUSY) {
796 if (new_skb != skb)
797 dev_kfree_skb_any(new_skb);
798 return NETDEV_TX_BUSY;
799 } else
800 goto tx_drop;
801 }
802
803 netif_wake_queue(dev);
804 if (card->options.performance_stats)
805 card->perf_stats.outbound_time += qeth_get_micros() -
806 card->perf_stats.outbound_start_time;
807 return rc;
808
809 tx_drop:
810 card->stats.tx_dropped++;
811 card->stats.tx_errors++;
812 if ((new_skb != skb) && new_skb)
813 dev_kfree_skb_any(new_skb);
814 dev_kfree_skb_any(skb);
815 netif_wake_queue(dev);
816 return NETDEV_TX_OK;
817 }
818
819 static int __qeth_l2_open(struct net_device *dev)
820 {
821 struct qeth_card *card = dev->ml_priv;
822 int rc = 0;
823
824 QETH_CARD_TEXT(card, 4, "qethopen");
825 if (card->state == CARD_STATE_UP)
826 return rc;
827 if (card->state != CARD_STATE_SOFTSETUP)
828 return -ENODEV;
829
830 if ((card->info.type != QETH_CARD_TYPE_OSN) &&
831 (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
832 QETH_CARD_TEXT(card, 4, "nomacadr");
833 return -EPERM;
834 }
835 card->data.state = CH_STATE_UP;
836 card->state = CARD_STATE_UP;
837 netif_start_queue(dev);
838
839 if (qdio_stop_irq(card->data.ccwdev, 0) >= 0) {
840 napi_enable(&card->napi);
841 napi_schedule(&card->napi);
842 } else
843 rc = -EIO;
844 return rc;
845 }
846
847 static int qeth_l2_open(struct net_device *dev)
848 {
849 struct qeth_card *card = dev->ml_priv;
850
851 QETH_CARD_TEXT(card, 5, "qethope_");
852 if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
853 QETH_CARD_TEXT(card, 3, "openREC");
854 return -ERESTARTSYS;
855 }
856 return __qeth_l2_open(dev);
857 }
858
859 static int qeth_l2_stop(struct net_device *dev)
860 {
861 struct qeth_card *card = dev->ml_priv;
862
863 QETH_CARD_TEXT(card, 4, "qethstop");
864 netif_tx_disable(dev);
865 if (card->state == CARD_STATE_UP) {
866 card->state = CARD_STATE_SOFTSETUP;
867 napi_disable(&card->napi);
868 }
869 return 0;
870 }
871
872 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
873 {
874 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
875
876 INIT_LIST_HEAD(&card->vid_list);
877 INIT_LIST_HEAD(&card->mc_list);
878 card->options.layer2 = 1;
879 card->info.hwtrap = 0;
880 card->discipline.start_poll = qeth_qdio_start_poll;
881 card->discipline.input_handler = (qdio_handler_t *)
882 qeth_qdio_input_handler;
883 card->discipline.output_handler = (qdio_handler_t *)
884 qeth_qdio_output_handler;
885 card->discipline.recover = qeth_l2_recover;
886 return 0;
887 }
888
889 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
890 {
891 struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
892
893 qeth_set_allowed_threads(card, 0, 1);
894 wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
895
896 if (cgdev->state == CCWGROUP_ONLINE)
897 qeth_l2_set_offline(cgdev);
898
899 if (card->dev) {
900 unregister_netdev(card->dev);
901 card->dev = NULL;
902 }
903 return;
904 }
905
906 static const struct ethtool_ops qeth_l2_ethtool_ops = {
907 .get_link = ethtool_op_get_link,
908 .get_strings = qeth_core_get_strings,
909 .get_ethtool_stats = qeth_core_get_ethtool_stats,
910 .get_sset_count = qeth_core_get_sset_count,
911 .get_drvinfo = qeth_core_get_drvinfo,
912 .get_settings = qeth_core_ethtool_get_settings,
913 };
914
915 static const 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_sset_count = qeth_core_get_sset_count,
919 .get_drvinfo = qeth_core_get_drvinfo,
920 };
921
922 static const struct net_device_ops qeth_l2_netdev_ops = {
923 .ndo_open = qeth_l2_open,
924 .ndo_stop = qeth_l2_stop,
925 .ndo_get_stats = qeth_get_stats,
926 .ndo_start_xmit = qeth_l2_hard_start_xmit,
927 .ndo_validate_addr = eth_validate_addr,
928 .ndo_set_rx_mode = qeth_l2_set_multicast_list,
929 .ndo_do_ioctl = qeth_l2_do_ioctl,
930 .ndo_set_mac_address = qeth_l2_set_mac_address,
931 .ndo_change_mtu = qeth_change_mtu,
932 .ndo_vlan_rx_add_vid = qeth_l2_vlan_rx_add_vid,
933 .ndo_vlan_rx_kill_vid = qeth_l2_vlan_rx_kill_vid,
934 .ndo_tx_timeout = qeth_tx_timeout,
935 };
936
937 static int qeth_l2_setup_netdev(struct qeth_card *card)
938 {
939 switch (card->info.type) {
940 case QETH_CARD_TYPE_IQD:
941 card->dev = alloc_netdev(0, "hsi%d", ether_setup);
942 break;
943 case QETH_CARD_TYPE_OSN:
944 card->dev = alloc_netdev(0, "osn%d", ether_setup);
945 card->dev->flags |= IFF_NOARP;
946 break;
947 default:
948 card->dev = alloc_etherdev(0);
949 }
950
951 if (!card->dev)
952 return -ENODEV;
953
954 card->dev->ml_priv = card;
955 card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
956 card->dev->mtu = card->info.initial_mtu;
957 card->dev->netdev_ops = &qeth_l2_netdev_ops;
958 if (card->info.type != QETH_CARD_TYPE_OSN)
959 SET_ETHTOOL_OPS(card->dev, &qeth_l2_ethtool_ops);
960 else
961 SET_ETHTOOL_OPS(card->dev, &qeth_l2_osn_ops);
962 card->dev->features |= NETIF_F_HW_VLAN_FILTER;
963 card->info.broadcast_capable = 1;
964 qeth_l2_request_initial_mac(card);
965 SET_NETDEV_DEV(card->dev, &card->gdev->dev);
966 netif_napi_add(card->dev, &card->napi, qeth_l2_poll, QETH_NAPI_WEIGHT);
967 return register_netdev(card->dev);
968 }
969
970 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
971 {
972 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
973 int rc = 0;
974 enum qeth_card_states recover_flag;
975
976 BUG_ON(!card);
977 mutex_lock(&card->discipline_mutex);
978 mutex_lock(&card->conf_mutex);
979 QETH_DBF_TEXT(SETUP, 2, "setonlin");
980 QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
981
982 recover_flag = card->state;
983 rc = qeth_core_hardsetup_card(card);
984 if (rc) {
985 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
986 rc = -ENODEV;
987 goto out_remove;
988 }
989
990 if (!card->dev && qeth_l2_setup_netdev(card)) {
991 rc = -ENODEV;
992 goto out_remove;
993 }
994
995 if (card->info.type != QETH_CARD_TYPE_OSN)
996 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
997
998 if (qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP)) {
999 if (card->info.hwtrap &&
1000 qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM))
1001 card->info.hwtrap = 0;
1002 } else
1003 card->info.hwtrap = 0;
1004
1005 card->state = CARD_STATE_HARDSETUP;
1006 memset(&card->rx, 0, sizeof(struct qeth_rx));
1007 qeth_print_status_message(card);
1008
1009 /* softsetup */
1010 QETH_DBF_TEXT(SETUP, 2, "softsetp");
1011
1012 rc = qeth_send_startlan(card);
1013 if (rc) {
1014 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1015 if (rc == 0xe080) {
1016 dev_warn(&card->gdev->dev,
1017 "The LAN is offline\n");
1018 card->lan_online = 0;
1019 goto contin;
1020 }
1021 rc = -ENODEV;
1022 goto out_remove;
1023 } else
1024 card->lan_online = 1;
1025
1026 contin:
1027 if ((card->info.type == QETH_CARD_TYPE_OSD) ||
1028 (card->info.type == QETH_CARD_TYPE_OSX))
1029 /* configure isolation level */
1030 qeth_set_access_ctrl_online(card);
1031
1032 if (card->info.type != QETH_CARD_TYPE_OSN &&
1033 card->info.type != QETH_CARD_TYPE_OSM)
1034 qeth_l2_process_vlans(card);
1035
1036 netif_tx_disable(card->dev);
1037
1038 rc = qeth_init_qdio_queues(card);
1039 if (rc) {
1040 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1041 rc = -ENODEV;
1042 goto out_remove;
1043 }
1044 card->state = CARD_STATE_SOFTSETUP;
1045 if (card->lan_online)
1046 netif_carrier_on(card->dev);
1047 else
1048 netif_carrier_off(card->dev);
1049
1050 qeth_set_allowed_threads(card, 0xffffffff, 0);
1051 if (recover_flag == CARD_STATE_RECOVER) {
1052 if (recovery_mode &&
1053 card->info.type != QETH_CARD_TYPE_OSN) {
1054 __qeth_l2_open(card->dev);
1055 } else {
1056 rtnl_lock();
1057 dev_open(card->dev);
1058 rtnl_unlock();
1059 }
1060 /* this also sets saved unicast addresses */
1061 qeth_l2_set_multicast_list(card->dev);
1062 }
1063 /* let user_space know that device is online */
1064 kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1065 mutex_unlock(&card->conf_mutex);
1066 mutex_unlock(&card->discipline_mutex);
1067 return 0;
1068
1069 out_remove:
1070 qeth_l2_stop_card(card, 0);
1071 ccw_device_set_offline(CARD_DDEV(card));
1072 ccw_device_set_offline(CARD_WDEV(card));
1073 ccw_device_set_offline(CARD_RDEV(card));
1074 if (recover_flag == CARD_STATE_RECOVER)
1075 card->state = CARD_STATE_RECOVER;
1076 else
1077 card->state = CARD_STATE_DOWN;
1078 mutex_unlock(&card->conf_mutex);
1079 mutex_unlock(&card->discipline_mutex);
1080 return rc;
1081 }
1082
1083 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1084 {
1085 return __qeth_l2_set_online(gdev, 0);
1086 }
1087
1088 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1089 int recovery_mode)
1090 {
1091 struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1092 int rc = 0, rc2 = 0, rc3 = 0;
1093 enum qeth_card_states recover_flag;
1094
1095 mutex_lock(&card->discipline_mutex);
1096 mutex_lock(&card->conf_mutex);
1097 QETH_DBF_TEXT(SETUP, 3, "setoffl");
1098 QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1099
1100 if (card->dev && netif_carrier_ok(card->dev))
1101 netif_carrier_off(card->dev);
1102 recover_flag = card->state;
1103 if ((!recovery_mode && card->info.hwtrap) || card->info.hwtrap == 2) {
1104 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1105 card->info.hwtrap = 1;
1106 }
1107 qeth_l2_stop_card(card, recovery_mode);
1108 rc = ccw_device_set_offline(CARD_DDEV(card));
1109 rc2 = ccw_device_set_offline(CARD_WDEV(card));
1110 rc3 = ccw_device_set_offline(CARD_RDEV(card));
1111 if (!rc)
1112 rc = (rc2) ? rc2 : rc3;
1113 if (rc)
1114 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1115 if (recover_flag == CARD_STATE_UP)
1116 card->state = CARD_STATE_RECOVER;
1117 /* let user_space know that device is offline */
1118 kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1119 mutex_unlock(&card->conf_mutex);
1120 mutex_unlock(&card->discipline_mutex);
1121 return 0;
1122 }
1123
1124 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1125 {
1126 return __qeth_l2_set_offline(cgdev, 0);
1127 }
1128
1129 static int qeth_l2_recover(void *ptr)
1130 {
1131 struct qeth_card *card;
1132 int rc = 0;
1133
1134 card = (struct qeth_card *) ptr;
1135 QETH_CARD_TEXT(card, 2, "recover1");
1136 if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1137 return 0;
1138 QETH_CARD_TEXT(card, 2, "recover2");
1139 dev_warn(&card->gdev->dev,
1140 "A recovery process has been started for the device\n");
1141 __qeth_l2_set_offline(card->gdev, 1);
1142 rc = __qeth_l2_set_online(card->gdev, 1);
1143 if (!rc)
1144 dev_info(&card->gdev->dev,
1145 "Device successfully recovered!\n");
1146 else {
1147 rtnl_lock();
1148 dev_close(card->dev);
1149 rtnl_unlock();
1150 dev_warn(&card->gdev->dev, "The qeth device driver "
1151 "failed to recover an error on the device\n");
1152 }
1153 qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1154 qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1155 return 0;
1156 }
1157
1158 static int __init qeth_l2_init(void)
1159 {
1160 pr_info("register layer 2 discipline\n");
1161 return 0;
1162 }
1163
1164 static void __exit qeth_l2_exit(void)
1165 {
1166 pr_info("unregister layer 2 discipline\n");
1167 }
1168
1169 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1170 {
1171 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1172 if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
1173 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1174 qeth_qdio_clear_card(card, 0);
1175 qeth_clear_qdio_buffers(card);
1176 }
1177
1178 static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev)
1179 {
1180 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1181
1182 if (card->dev)
1183 netif_device_detach(card->dev);
1184 qeth_set_allowed_threads(card, 0, 1);
1185 wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1186 if (gdev->state == CCWGROUP_OFFLINE)
1187 return 0;
1188 if (card->state == CARD_STATE_UP) {
1189 if (card->info.hwtrap)
1190 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1191 __qeth_l2_set_offline(card->gdev, 1);
1192 } else
1193 __qeth_l2_set_offline(card->gdev, 0);
1194 return 0;
1195 }
1196
1197 static int qeth_l2_pm_resume(struct ccwgroup_device *gdev)
1198 {
1199 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1200 int rc = 0;
1201
1202 if (gdev->state == CCWGROUP_OFFLINE)
1203 goto out;
1204
1205 if (card->state == CARD_STATE_RECOVER) {
1206 rc = __qeth_l2_set_online(card->gdev, 1);
1207 if (rc) {
1208 rtnl_lock();
1209 dev_close(card->dev);
1210 rtnl_unlock();
1211 }
1212 } else
1213 rc = __qeth_l2_set_online(card->gdev, 0);
1214 out:
1215 qeth_set_allowed_threads(card, 0xffffffff, 0);
1216 if (card->dev)
1217 netif_device_attach(card->dev);
1218 if (rc)
1219 dev_warn(&card->gdev->dev, "The qeth device driver "
1220 "failed to recover an error on the device\n");
1221 return rc;
1222 }
1223
1224 struct ccwgroup_driver qeth_l2_ccwgroup_driver = {
1225 .probe = qeth_l2_probe_device,
1226 .remove = qeth_l2_remove_device,
1227 .set_online = qeth_l2_set_online,
1228 .set_offline = qeth_l2_set_offline,
1229 .shutdown = qeth_l2_shutdown,
1230 .freeze = qeth_l2_pm_suspend,
1231 .thaw = qeth_l2_pm_resume,
1232 .restore = qeth_l2_pm_resume,
1233 };
1234 EXPORT_SYMBOL_GPL(qeth_l2_ccwgroup_driver);
1235
1236 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1237 struct qeth_cmd_buffer *iob)
1238 {
1239 unsigned long flags;
1240 int rc = 0;
1241
1242 QETH_CARD_TEXT(card, 5, "osndctrd");
1243
1244 wait_event(card->wait_q,
1245 atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1246 qeth_prepare_control_data(card, len, iob);
1247 QETH_CARD_TEXT(card, 6, "osnoirqp");
1248 spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1249 rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1250 (addr_t) iob, 0, 0);
1251 spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1252 if (rc) {
1253 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1254 "ccw_device_start rc = %i\n", rc);
1255 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1256 qeth_release_buffer(iob->channel, iob);
1257 atomic_set(&card->write.irq_pending, 0);
1258 wake_up(&card->wait_q);
1259 }
1260 return rc;
1261 }
1262
1263 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1264 struct qeth_cmd_buffer *iob, int data_len)
1265 {
1266 u16 s1, s2;
1267
1268 QETH_CARD_TEXT(card, 4, "osndipa");
1269
1270 qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1271 s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1272 s2 = (u16)data_len;
1273 memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1274 memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1275 memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1276 memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1277 return qeth_osn_send_control_data(card, s1, iob);
1278 }
1279
1280 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1281 {
1282 struct qeth_cmd_buffer *iob;
1283 struct qeth_card *card;
1284 int rc;
1285
1286 if (!dev)
1287 return -ENODEV;
1288 card = dev->ml_priv;
1289 if (!card)
1290 return -ENODEV;
1291 QETH_CARD_TEXT(card, 2, "osnsdmc");
1292 if ((card->state != CARD_STATE_UP) &&
1293 (card->state != CARD_STATE_SOFTSETUP))
1294 return -ENODEV;
1295 iob = qeth_wait_for_buffer(&card->write);
1296 memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1297 rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1298 return rc;
1299 }
1300 EXPORT_SYMBOL(qeth_osn_assist);
1301
1302 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1303 int (*assist_cb)(struct net_device *, void *),
1304 int (*data_cb)(struct sk_buff *))
1305 {
1306 struct qeth_card *card;
1307
1308 *dev = qeth_l2_netdev_by_devno(read_dev_no);
1309 if (*dev == NULL)
1310 return -ENODEV;
1311 card = (*dev)->ml_priv;
1312 if (!card)
1313 return -ENODEV;
1314 QETH_CARD_TEXT(card, 2, "osnreg");
1315 if ((assist_cb == NULL) || (data_cb == NULL))
1316 return -EINVAL;
1317 card->osn_info.assist_cb = assist_cb;
1318 card->osn_info.data_cb = data_cb;
1319 return 0;
1320 }
1321 EXPORT_SYMBOL(qeth_osn_register);
1322
1323 void qeth_osn_deregister(struct net_device *dev)
1324 {
1325 struct qeth_card *card;
1326
1327 if (!dev)
1328 return;
1329 card = dev->ml_priv;
1330 if (!card)
1331 return;
1332 QETH_CARD_TEXT(card, 2, "osndereg");
1333 card->osn_info.assist_cb = NULL;
1334 card->osn_info.data_cb = NULL;
1335 return;
1336 }
1337 EXPORT_SYMBOL(qeth_osn_deregister);
1338
1339 module_init(qeth_l2_init);
1340 module_exit(qeth_l2_exit);
1341 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1342 MODULE_DESCRIPTION("qeth layer 2 discipline");
1343 MODULE_LICENSE("GPL");
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