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[mirror_ubuntu-bionic-kernel.git] / drivers / s390 / net / qeth_l2_main.c
1 /*
2 * Copyright IBM Corp. 2007, 2009
3 * Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
4 * Frank Pavlic <fpavlic@de.ibm.com>,
5 * Thomas Spatzier <tspat@de.ibm.com>,
6 * Frank Blaschka <frank.blaschka@de.ibm.com>
7 */
8
9 #define KMSG_COMPONENT "qeth"
10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
11
12 #include <linux/module.h>
13 #include <linux/moduleparam.h>
14 #include <linux/string.h>
15 #include <linux/errno.h>
16 #include <linux/kernel.h>
17 #include <linux/slab.h>
18 #include <linux/etherdevice.h>
19 #include <linux/mii.h>
20 #include <linux/ip.h>
21 #include <linux/list.h>
22
23 #include "qeth_core.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_OSD ||
58 card->info.type == QETH_CARD_TYPE_OSM ||
59 card->info.type == QETH_CARD_TYPE_OSX) &&
60 !card->info.guestlan)
61 return 1;
62 return 0;
63 break;
64 case SIOCGMIIPHY:
65 mii_data = if_mii(rq);
66 mii_data->phy_id = 0;
67 break;
68 case SIOCGMIIREG:
69 mii_data = if_mii(rq);
70 if (mii_data->phy_id != 0)
71 rc = -EINVAL;
72 else
73 mii_data->val_out = qeth_mdio_read(dev,
74 mii_data->phy_id, mii_data->reg_num);
75 break;
76 case SIOC_QETH_QUERY_OAT:
77 rc = qeth_query_oat_command(card, rq->ifr_ifru.ifru_data);
78 break;
79 default:
80 rc = -EOPNOTSUPP;
81 }
82 if (rc)
83 QETH_CARD_TEXT_(card, 2, "ioce%d", rc);
84 return rc;
85 }
86
87 static int qeth_l2_verify_dev(struct net_device *dev)
88 {
89 struct qeth_card *card;
90 unsigned long flags;
91 int rc = 0;
92
93 read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
94 list_for_each_entry(card, &qeth_core_card_list.list, list) {
95 if (card->dev == dev) {
96 rc = QETH_REAL_CARD;
97 break;
98 }
99 }
100 read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
101
102 return rc;
103 }
104
105 static struct net_device *qeth_l2_netdev_by_devno(unsigned char *read_dev_no)
106 {
107 struct qeth_card *card;
108 struct net_device *ndev;
109 __u16 temp_dev_no;
110 unsigned long flags;
111 struct ccw_dev_id read_devid;
112
113 ndev = NULL;
114 memcpy(&temp_dev_no, read_dev_no, 2);
115 read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
116 list_for_each_entry(card, &qeth_core_card_list.list, list) {
117 ccw_device_get_id(CARD_RDEV(card), &read_devid);
118 if (read_devid.devno == temp_dev_no) {
119 ndev = card->dev;
120 break;
121 }
122 }
123 read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
124 return ndev;
125 }
126
127 static int qeth_l2_send_setgroupmac_cb(struct qeth_card *card,
128 struct qeth_reply *reply,
129 unsigned long data)
130 {
131 struct qeth_ipa_cmd *cmd;
132 __u8 *mac;
133
134 QETH_CARD_TEXT(card, 2, "L2Sgmacb");
135 cmd = (struct qeth_ipa_cmd *) data;
136 mac = &cmd->data.setdelmac.mac[0];
137 /* MAC already registered, needed in couple/uncouple case */
138 if (cmd->hdr.return_code == IPA_RC_L2_DUP_MAC) {
139 QETH_DBF_MESSAGE(2, "Group MAC %pM already existing on %s \n",
140 mac, QETH_CARD_IFNAME(card));
141 cmd->hdr.return_code = 0;
142 }
143 if (cmd->hdr.return_code)
144 QETH_DBF_MESSAGE(2, "Could not set group MAC %pM on %s: %x\n",
145 mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code);
146 return 0;
147 }
148
149 static int qeth_l2_send_setgroupmac(struct qeth_card *card, __u8 *mac)
150 {
151 QETH_CARD_TEXT(card, 2, "L2Sgmac");
152 return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETGMAC,
153 qeth_l2_send_setgroupmac_cb);
154 }
155
156 static int qeth_l2_send_delgroupmac_cb(struct qeth_card *card,
157 struct qeth_reply *reply,
158 unsigned long data)
159 {
160 struct qeth_ipa_cmd *cmd;
161 __u8 *mac;
162
163 QETH_CARD_TEXT(card, 2, "L2Dgmacb");
164 cmd = (struct qeth_ipa_cmd *) data;
165 mac = &cmd->data.setdelmac.mac[0];
166 if (cmd->hdr.return_code)
167 QETH_DBF_MESSAGE(2, "Could not delete group MAC %pM on %s: %x\n",
168 mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code);
169 return 0;
170 }
171
172 static int qeth_l2_send_delgroupmac(struct qeth_card *card, __u8 *mac)
173 {
174 QETH_CARD_TEXT(card, 2, "L2Dgmac");
175 return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELGMAC,
176 qeth_l2_send_delgroupmac_cb);
177 }
178
179 static void qeth_l2_add_mc(struct qeth_card *card, __u8 *mac, int vmac)
180 {
181 struct qeth_mc_mac *mc;
182 int rc;
183
184 mc = kmalloc(sizeof(struct qeth_mc_mac), GFP_ATOMIC);
185
186 if (!mc)
187 return;
188
189 memcpy(mc->mc_addr, mac, OSA_ADDR_LEN);
190 mc->mc_addrlen = OSA_ADDR_LEN;
191 mc->is_vmac = vmac;
192
193 if (vmac) {
194 rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
195 NULL);
196 } else {
197 rc = qeth_l2_send_setgroupmac(card, mac);
198 }
199
200 if (!rc)
201 list_add_tail(&mc->list, &card->mc_list);
202 else
203 kfree(mc);
204 }
205
206 static void qeth_l2_del_all_mc(struct qeth_card *card, int del)
207 {
208 struct qeth_mc_mac *mc, *tmp;
209
210 spin_lock_bh(&card->mclock);
211 list_for_each_entry_safe(mc, tmp, &card->mc_list, list) {
212 if (del) {
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 }
219 list_del(&mc->list);
220 kfree(mc);
221 }
222 spin_unlock_bh(&card->mclock);
223 }
224
225 static inline int qeth_l2_get_cast_type(struct qeth_card *card,
226 struct sk_buff *skb)
227 {
228 if (card->info.type == QETH_CARD_TYPE_OSN)
229 return RTN_UNSPEC;
230 if (is_broadcast_ether_addr(skb->data))
231 return RTN_BROADCAST;
232 if (is_multicast_ether_addr(skb->data))
233 return RTN_MULTICAST;
234 return RTN_UNSPEC;
235 }
236
237 static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
238 struct sk_buff *skb, int ipv, int cast_type)
239 {
240 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
241
242 memset(hdr, 0, sizeof(struct qeth_hdr));
243 hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
244
245 /* set byte byte 3 to casting flags */
246 if (cast_type == RTN_MULTICAST)
247 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
248 else if (cast_type == RTN_BROADCAST)
249 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
250 else
251 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
252
253 hdr->hdr.l2.pkt_length = skb->len-QETH_HEADER_SIZE;
254 /* VSWITCH relies on the VLAN
255 * information to be present in
256 * the QDIO header */
257 if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
258 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
259 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
260 }
261 }
262
263 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
264 struct qeth_reply *reply, unsigned long data)
265 {
266 struct qeth_ipa_cmd *cmd;
267
268 QETH_CARD_TEXT(card, 2, "L2sdvcb");
269 cmd = (struct qeth_ipa_cmd *) data;
270 if (cmd->hdr.return_code) {
271 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x. "
272 "Continuing\n", cmd->data.setdelvlan.vlan_id,
273 QETH_CARD_IFNAME(card), cmd->hdr.return_code);
274 QETH_CARD_TEXT_(card, 2, "L2VL%4x", cmd->hdr.command);
275 QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code);
276 }
277 return 0;
278 }
279
280 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
281 enum qeth_ipa_cmds ipacmd)
282 {
283 struct qeth_ipa_cmd *cmd;
284 struct qeth_cmd_buffer *iob;
285
286 QETH_CARD_TEXT_(card, 4, "L2sdv%x", ipacmd);
287 iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
288 cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
289 cmd->data.setdelvlan.vlan_id = i;
290 return qeth_send_ipa_cmd(card, iob,
291 qeth_l2_send_setdelvlan_cb, NULL);
292 }
293
294 static void qeth_l2_process_vlans(struct qeth_card *card)
295 {
296 struct qeth_vlan_vid *id;
297 QETH_CARD_TEXT(card, 3, "L2prcvln");
298 spin_lock_bh(&card->vlanlock);
299 list_for_each_entry(id, &card->vid_list, list) {
300 qeth_l2_send_setdelvlan(card, id->vid, IPA_CMD_SETVLAN);
301 }
302 spin_unlock_bh(&card->vlanlock);
303 }
304
305 static int qeth_l2_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
306 {
307 struct qeth_card *card = dev->ml_priv;
308 struct qeth_vlan_vid *id;
309
310 QETH_CARD_TEXT_(card, 4, "aid:%d", vid);
311 if (!vid)
312 return 0;
313 if (card->info.type == QETH_CARD_TYPE_OSM) {
314 QETH_CARD_TEXT(card, 3, "aidOSM");
315 return 0;
316 }
317 if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
318 QETH_CARD_TEXT(card, 3, "aidREC");
319 return 0;
320 }
321 id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
322 if (id) {
323 id->vid = vid;
324 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
325 spin_lock_bh(&card->vlanlock);
326 list_add_tail(&id->list, &card->vid_list);
327 spin_unlock_bh(&card->vlanlock);
328 } else {
329 return -ENOMEM;
330 }
331 return 0;
332 }
333
334 static int qeth_l2_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
335 {
336 struct qeth_vlan_vid *id, *tmpid = NULL;
337 struct qeth_card *card = dev->ml_priv;
338
339 QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
340 if (card->info.type == QETH_CARD_TYPE_OSM) {
341 QETH_CARD_TEXT(card, 3, "kidOSM");
342 return 0;
343 }
344 if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
345 QETH_CARD_TEXT(card, 3, "kidREC");
346 return 0;
347 }
348 spin_lock_bh(&card->vlanlock);
349 list_for_each_entry(id, &card->vid_list, list) {
350 if (id->vid == vid) {
351 list_del(&id->list);
352 tmpid = id;
353 break;
354 }
355 }
356 spin_unlock_bh(&card->vlanlock);
357 if (tmpid) {
358 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
359 kfree(tmpid);
360 }
361 qeth_l2_set_multicast_list(card->dev);
362 return 0;
363 }
364
365 static int qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
366 {
367 int rc = 0;
368
369 QETH_DBF_TEXT(SETUP , 2, "stopcard");
370 QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
371
372 qeth_set_allowed_threads(card, 0, 1);
373 if (card->read.state == CH_STATE_UP &&
374 card->write.state == CH_STATE_UP &&
375 (card->state == CARD_STATE_UP)) {
376 if (recovery_mode &&
377 card->info.type != QETH_CARD_TYPE_OSN) {
378 qeth_l2_stop(card->dev);
379 } else {
380 rtnl_lock();
381 dev_close(card->dev);
382 rtnl_unlock();
383 }
384 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
385 card->state = CARD_STATE_SOFTSETUP;
386 }
387 if (card->state == CARD_STATE_SOFTSETUP) {
388 qeth_l2_del_all_mc(card, 0);
389 qeth_clear_ipacmd_list(card);
390 card->state = CARD_STATE_HARDSETUP;
391 }
392 if (card->state == CARD_STATE_HARDSETUP) {
393 qeth_qdio_clear_card(card, 0);
394 qeth_clear_qdio_buffers(card);
395 qeth_clear_working_pool_list(card);
396 card->state = CARD_STATE_DOWN;
397 }
398 if (card->state == CARD_STATE_DOWN) {
399 qeth_clear_cmd_buffers(&card->read);
400 qeth_clear_cmd_buffers(&card->write);
401 }
402 return rc;
403 }
404
405 static int qeth_l2_process_inbound_buffer(struct qeth_card *card,
406 int budget, int *done)
407 {
408 int work_done = 0;
409 struct sk_buff *skb;
410 struct qeth_hdr *hdr;
411 unsigned int len;
412
413 *done = 0;
414 BUG_ON(!budget);
415 while (budget) {
416 skb = qeth_core_get_next_skb(card,
417 &card->qdio.in_q->bufs[card->rx.b_index],
418 &card->rx.b_element, &card->rx.e_offset, &hdr);
419 if (!skb) {
420 *done = 1;
421 break;
422 }
423 skb->dev = card->dev;
424 switch (hdr->hdr.l2.id) {
425 case QETH_HEADER_TYPE_LAYER2:
426 skb->pkt_type = PACKET_HOST;
427 skb->protocol = eth_type_trans(skb, skb->dev);
428 skb->ip_summed = CHECKSUM_NONE;
429 if (skb->protocol == htons(ETH_P_802_2))
430 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
431 len = skb->len;
432 netif_receive_skb(skb);
433 break;
434 case QETH_HEADER_TYPE_OSN:
435 if (card->info.type == QETH_CARD_TYPE_OSN) {
436 skb_push(skb, sizeof(struct qeth_hdr));
437 skb_copy_to_linear_data(skb, hdr,
438 sizeof(struct qeth_hdr));
439 len = skb->len;
440 card->osn_info.data_cb(skb);
441 break;
442 }
443 /* else unknown */
444 default:
445 dev_kfree_skb_any(skb);
446 QETH_CARD_TEXT(card, 3, "inbunkno");
447 QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
448 continue;
449 }
450 work_done++;
451 budget--;
452 card->stats.rx_packets++;
453 card->stats.rx_bytes += len;
454 }
455 return work_done;
456 }
457
458 static int qeth_l2_poll(struct napi_struct *napi, int budget)
459 {
460 struct qeth_card *card = container_of(napi, struct qeth_card, napi);
461 int work_done = 0;
462 struct qeth_qdio_buffer *buffer;
463 int done;
464 int new_budget = budget;
465
466 if (card->options.performance_stats) {
467 card->perf_stats.inbound_cnt++;
468 card->perf_stats.inbound_start_time = qeth_get_micros();
469 }
470
471 while (1) {
472 if (!card->rx.b_count) {
473 card->rx.qdio_err = 0;
474 card->rx.b_count = qdio_get_next_buffers(
475 card->data.ccwdev, 0, &card->rx.b_index,
476 &card->rx.qdio_err);
477 if (card->rx.b_count <= 0) {
478 card->rx.b_count = 0;
479 break;
480 }
481 card->rx.b_element =
482 &card->qdio.in_q->bufs[card->rx.b_index]
483 .buffer->element[0];
484 card->rx.e_offset = 0;
485 }
486
487 while (card->rx.b_count) {
488 buffer = &card->qdio.in_q->bufs[card->rx.b_index];
489 if (!(card->rx.qdio_err &&
490 qeth_check_qdio_errors(card, buffer->buffer,
491 card->rx.qdio_err, "qinerr")))
492 work_done += qeth_l2_process_inbound_buffer(
493 card, new_budget, &done);
494 else
495 done = 1;
496
497 if (done) {
498 if (card->options.performance_stats)
499 card->perf_stats.bufs_rec++;
500 qeth_put_buffer_pool_entry(card,
501 buffer->pool_entry);
502 qeth_queue_input_buffer(card, card->rx.b_index);
503 card->rx.b_count--;
504 if (card->rx.b_count) {
505 card->rx.b_index =
506 (card->rx.b_index + 1) %
507 QDIO_MAX_BUFFERS_PER_Q;
508 card->rx.b_element =
509 &card->qdio.in_q
510 ->bufs[card->rx.b_index]
511 .buffer->element[0];
512 card->rx.e_offset = 0;
513 }
514 }
515
516 if (work_done >= budget)
517 goto out;
518 else
519 new_budget = budget - work_done;
520 }
521 }
522
523 napi_complete(napi);
524 if (qdio_start_irq(card->data.ccwdev, 0))
525 napi_schedule(&card->napi);
526 out:
527 if (card->options.performance_stats)
528 card->perf_stats.inbound_time += qeth_get_micros() -
529 card->perf_stats.inbound_start_time;
530 return work_done;
531 }
532
533 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
534 enum qeth_ipa_cmds ipacmd,
535 int (*reply_cb) (struct qeth_card *,
536 struct qeth_reply*,
537 unsigned long))
538 {
539 struct qeth_ipa_cmd *cmd;
540 struct qeth_cmd_buffer *iob;
541
542 QETH_CARD_TEXT(card, 2, "L2sdmac");
543 iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
544 cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
545 cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
546 memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
547 return qeth_send_ipa_cmd(card, iob, reply_cb, NULL);
548 }
549
550 static int qeth_l2_send_setmac_cb(struct qeth_card *card,
551 struct qeth_reply *reply,
552 unsigned long data)
553 {
554 struct qeth_ipa_cmd *cmd;
555
556 QETH_CARD_TEXT(card, 2, "L2Smaccb");
557 cmd = (struct qeth_ipa_cmd *) data;
558 if (cmd->hdr.return_code) {
559 QETH_CARD_TEXT_(card, 2, "L2er%x", cmd->hdr.return_code);
560 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
561 switch (cmd->hdr.return_code) {
562 case IPA_RC_L2_DUP_MAC:
563 case IPA_RC_L2_DUP_LAYER3_MAC:
564 dev_warn(&card->gdev->dev,
565 "MAC address %pM already exists\n",
566 cmd->data.setdelmac.mac);
567 break;
568 case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
569 case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
570 dev_warn(&card->gdev->dev,
571 "MAC address %pM is not authorized\n",
572 cmd->data.setdelmac.mac);
573 break;
574 default:
575 break;
576 }
577 } else {
578 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
579 memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac,
580 OSA_ADDR_LEN);
581 dev_info(&card->gdev->dev,
582 "MAC address %pM successfully registered on device %s\n",
583 card->dev->dev_addr, card->dev->name);
584 }
585 return 0;
586 }
587
588 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
589 {
590 QETH_CARD_TEXT(card, 2, "L2Setmac");
591 return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
592 qeth_l2_send_setmac_cb);
593 }
594
595 static int qeth_l2_send_delmac_cb(struct qeth_card *card,
596 struct qeth_reply *reply,
597 unsigned long data)
598 {
599 struct qeth_ipa_cmd *cmd;
600
601 QETH_CARD_TEXT(card, 2, "L2Dmaccb");
602 cmd = (struct qeth_ipa_cmd *) data;
603 if (cmd->hdr.return_code) {
604 QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code);
605 return 0;
606 }
607 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
608
609 return 0;
610 }
611
612 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
613 {
614 QETH_CARD_TEXT(card, 2, "L2Delmac");
615 if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
616 return 0;
617 return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC,
618 qeth_l2_send_delmac_cb);
619 }
620
621 static int qeth_l2_request_initial_mac(struct qeth_card *card)
622 {
623 int rc = 0;
624 char vendor_pre[] = {0x02, 0x00, 0x00};
625
626 QETH_DBF_TEXT(SETUP, 2, "doL2init");
627 QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
628
629 rc = qeth_query_setadapterparms(card);
630 if (rc) {
631 QETH_DBF_MESSAGE(2, "could not query adapter parameters on "
632 "device %s: x%x\n", CARD_BUS_ID(card), rc);
633 }
634
635 if (card->info.type == QETH_CARD_TYPE_IQD ||
636 card->info.type == QETH_CARD_TYPE_OSM ||
637 card->info.type == QETH_CARD_TYPE_OSX ||
638 card->info.guestlan) {
639 rc = qeth_setadpparms_change_macaddr(card);
640 if (rc) {
641 QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
642 "device %s: x%x\n", CARD_BUS_ID(card), rc);
643 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
644 return rc;
645 }
646 QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN);
647 } else {
648 eth_random_addr(card->dev->dev_addr);
649 memcpy(card->dev->dev_addr, vendor_pre, 3);
650 }
651 return 0;
652 }
653
654 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
655 {
656 struct sockaddr *addr = p;
657 struct qeth_card *card = dev->ml_priv;
658 int rc = 0;
659
660 QETH_CARD_TEXT(card, 3, "setmac");
661
662 if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
663 QETH_CARD_TEXT(card, 3, "setmcINV");
664 return -EOPNOTSUPP;
665 }
666
667 if (card->info.type == QETH_CARD_TYPE_OSN ||
668 card->info.type == QETH_CARD_TYPE_OSM ||
669 card->info.type == QETH_CARD_TYPE_OSX) {
670 QETH_CARD_TEXT(card, 3, "setmcTYP");
671 return -EOPNOTSUPP;
672 }
673 QETH_CARD_HEX(card, 3, addr->sa_data, OSA_ADDR_LEN);
674 if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
675 QETH_CARD_TEXT(card, 3, "setmcREC");
676 return -ERESTARTSYS;
677 }
678 rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
679 if (!rc)
680 rc = qeth_l2_send_setmac(card, addr->sa_data);
681 return rc ? -EINVAL : 0;
682 }
683
684 static void qeth_l2_set_multicast_list(struct net_device *dev)
685 {
686 struct qeth_card *card = dev->ml_priv;
687 struct netdev_hw_addr *ha;
688
689 if (card->info.type == QETH_CARD_TYPE_OSN)
690 return ;
691
692 QETH_CARD_TEXT(card, 3, "setmulti");
693 if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
694 (card->state != CARD_STATE_UP))
695 return;
696 qeth_l2_del_all_mc(card, 1);
697 spin_lock_bh(&card->mclock);
698 netdev_for_each_mc_addr(ha, dev)
699 qeth_l2_add_mc(card, ha->addr, 0);
700
701 netdev_for_each_uc_addr(ha, dev)
702 qeth_l2_add_mc(card, ha->addr, 1);
703
704 spin_unlock_bh(&card->mclock);
705 if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
706 return;
707 qeth_setadp_promisc_mode(card);
708 }
709
710 static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
711 {
712 int rc;
713 struct qeth_hdr *hdr = NULL;
714 int elements = 0;
715 struct qeth_card *card = dev->ml_priv;
716 struct sk_buff *new_skb = skb;
717 int ipv = qeth_get_ip_version(skb);
718 int cast_type = qeth_l2_get_cast_type(card, skb);
719 struct qeth_qdio_out_q *queue = card->qdio.out_qs
720 [qeth_get_priority_queue(card, skb, ipv, cast_type)];
721 int tx_bytes = skb->len;
722 int data_offset = -1;
723 int elements_needed = 0;
724 int hd_len = 0;
725
726 if ((card->state != CARD_STATE_UP) || !card->lan_online) {
727 card->stats.tx_carrier_errors++;
728 goto tx_drop;
729 }
730
731 if ((card->info.type == QETH_CARD_TYPE_OSN) &&
732 (skb->protocol == htons(ETH_P_IPV6)))
733 goto tx_drop;
734
735 if (card->options.performance_stats) {
736 card->perf_stats.outbound_cnt++;
737 card->perf_stats.outbound_start_time = qeth_get_micros();
738 }
739 netif_stop_queue(dev);
740
741 if (card->info.type == QETH_CARD_TYPE_OSN)
742 hdr = (struct qeth_hdr *)skb->data;
743 else {
744 if (card->info.type == QETH_CARD_TYPE_IQD) {
745 new_skb = skb;
746 data_offset = ETH_HLEN;
747 hd_len = ETH_HLEN;
748 hdr = kmem_cache_alloc(qeth_core_header_cache,
749 GFP_ATOMIC);
750 if (!hdr)
751 goto tx_drop;
752 elements_needed++;
753 skb_reset_mac_header(new_skb);
754 qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
755 hdr->hdr.l2.pkt_length = new_skb->len;
756 memcpy(((char *)hdr) + sizeof(struct qeth_hdr),
757 skb_mac_header(new_skb), ETH_HLEN);
758 } else {
759 /* create a clone with writeable headroom */
760 new_skb = skb_realloc_headroom(skb,
761 sizeof(struct qeth_hdr));
762 if (!new_skb)
763 goto tx_drop;
764 hdr = (struct qeth_hdr *)skb_push(new_skb,
765 sizeof(struct qeth_hdr));
766 skb_set_mac_header(new_skb, sizeof(struct qeth_hdr));
767 qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
768 }
769 }
770
771 elements = qeth_get_elements_no(card, (void *)hdr, new_skb,
772 elements_needed);
773 if (!elements) {
774 if (data_offset >= 0)
775 kmem_cache_free(qeth_core_header_cache, hdr);
776 goto tx_drop;
777 }
778
779 if (card->info.type != QETH_CARD_TYPE_IQD) {
780 if (qeth_hdr_chk_and_bounce(new_skb,
781 sizeof(struct qeth_hdr_layer2)))
782 goto tx_drop;
783 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
784 elements);
785 } else
786 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
787 elements, data_offset, hd_len);
788 if (!rc) {
789 card->stats.tx_packets++;
790 card->stats.tx_bytes += tx_bytes;
791 if (new_skb != skb)
792 dev_kfree_skb_any(skb);
793 rc = NETDEV_TX_OK;
794 } else {
795 if (data_offset >= 0)
796 kmem_cache_free(qeth_core_header_cache, hdr);
797
798 if (rc == -EBUSY) {
799 if (new_skb != skb)
800 dev_kfree_skb_any(new_skb);
801 return NETDEV_TX_BUSY;
802 } else
803 goto tx_drop;
804 }
805
806 netif_wake_queue(dev);
807 if (card->options.performance_stats)
808 card->perf_stats.outbound_time += qeth_get_micros() -
809 card->perf_stats.outbound_start_time;
810 return rc;
811
812 tx_drop:
813 card->stats.tx_dropped++;
814 card->stats.tx_errors++;
815 if ((new_skb != skb) && new_skb)
816 dev_kfree_skb_any(new_skb);
817 dev_kfree_skb_any(skb);
818 netif_wake_queue(dev);
819 return NETDEV_TX_OK;
820 }
821
822 static int __qeth_l2_open(struct net_device *dev)
823 {
824 struct qeth_card *card = dev->ml_priv;
825 int rc = 0;
826
827 QETH_CARD_TEXT(card, 4, "qethopen");
828 if (card->state == CARD_STATE_UP)
829 return rc;
830 if (card->state != CARD_STATE_SOFTSETUP)
831 return -ENODEV;
832
833 if ((card->info.type != QETH_CARD_TYPE_OSN) &&
834 (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
835 QETH_CARD_TEXT(card, 4, "nomacadr");
836 return -EPERM;
837 }
838 card->data.state = CH_STATE_UP;
839 card->state = CARD_STATE_UP;
840 netif_start_queue(dev);
841
842 if (qdio_stop_irq(card->data.ccwdev, 0) >= 0) {
843 napi_enable(&card->napi);
844 napi_schedule(&card->napi);
845 } else
846 rc = -EIO;
847 return rc;
848 }
849
850 static int qeth_l2_open(struct net_device *dev)
851 {
852 struct qeth_card *card = dev->ml_priv;
853
854 QETH_CARD_TEXT(card, 5, "qethope_");
855 if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
856 QETH_CARD_TEXT(card, 3, "openREC");
857 return -ERESTARTSYS;
858 }
859 return __qeth_l2_open(dev);
860 }
861
862 static int qeth_l2_stop(struct net_device *dev)
863 {
864 struct qeth_card *card = dev->ml_priv;
865
866 QETH_CARD_TEXT(card, 4, "qethstop");
867 netif_tx_disable(dev);
868 if (card->state == CARD_STATE_UP) {
869 card->state = CARD_STATE_SOFTSETUP;
870 napi_disable(&card->napi);
871 }
872 return 0;
873 }
874
875 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
876 {
877 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
878
879 INIT_LIST_HEAD(&card->vid_list);
880 INIT_LIST_HEAD(&card->mc_list);
881 card->options.layer2 = 1;
882 card->info.hwtrap = 0;
883 return 0;
884 }
885
886 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
887 {
888 struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
889
890 qeth_set_allowed_threads(card, 0, 1);
891 wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
892
893 if (cgdev->state == CCWGROUP_ONLINE)
894 qeth_l2_set_offline(cgdev);
895
896 if (card->dev) {
897 unregister_netdev(card->dev);
898 card->dev = NULL;
899 }
900 return;
901 }
902
903 static const struct ethtool_ops qeth_l2_ethtool_ops = {
904 .get_link = ethtool_op_get_link,
905 .get_strings = qeth_core_get_strings,
906 .get_ethtool_stats = qeth_core_get_ethtool_stats,
907 .get_sset_count = qeth_core_get_sset_count,
908 .get_drvinfo = qeth_core_get_drvinfo,
909 .get_settings = qeth_core_ethtool_get_settings,
910 };
911
912 static const struct ethtool_ops qeth_l2_osn_ops = {
913 .get_strings = qeth_core_get_strings,
914 .get_ethtool_stats = qeth_core_get_ethtool_stats,
915 .get_sset_count = qeth_core_get_sset_count,
916 .get_drvinfo = qeth_core_get_drvinfo,
917 };
918
919 static const struct net_device_ops qeth_l2_netdev_ops = {
920 .ndo_open = qeth_l2_open,
921 .ndo_stop = qeth_l2_stop,
922 .ndo_get_stats = qeth_get_stats,
923 .ndo_start_xmit = qeth_l2_hard_start_xmit,
924 .ndo_validate_addr = eth_validate_addr,
925 .ndo_set_rx_mode = qeth_l2_set_multicast_list,
926 .ndo_do_ioctl = qeth_l2_do_ioctl,
927 .ndo_set_mac_address = qeth_l2_set_mac_address,
928 .ndo_change_mtu = qeth_change_mtu,
929 .ndo_vlan_rx_add_vid = qeth_l2_vlan_rx_add_vid,
930 .ndo_vlan_rx_kill_vid = qeth_l2_vlan_rx_kill_vid,
931 .ndo_tx_timeout = qeth_tx_timeout,
932 };
933
934 static int qeth_l2_setup_netdev(struct qeth_card *card)
935 {
936 switch (card->info.type) {
937 case QETH_CARD_TYPE_IQD:
938 card->dev = alloc_netdev(0, "hsi%d", ether_setup);
939 break;
940 case QETH_CARD_TYPE_OSN:
941 card->dev = alloc_netdev(0, "osn%d", ether_setup);
942 card->dev->flags |= IFF_NOARP;
943 break;
944 default:
945 card->dev = alloc_etherdev(0);
946 }
947
948 if (!card->dev)
949 return -ENODEV;
950
951 card->dev->ml_priv = card;
952 card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
953 card->dev->mtu = card->info.initial_mtu;
954 card->dev->netdev_ops = &qeth_l2_netdev_ops;
955 if (card->info.type != QETH_CARD_TYPE_OSN)
956 SET_ETHTOOL_OPS(card->dev, &qeth_l2_ethtool_ops);
957 else
958 SET_ETHTOOL_OPS(card->dev, &qeth_l2_osn_ops);
959 card->dev->features |= NETIF_F_HW_VLAN_FILTER;
960 card->info.broadcast_capable = 1;
961 qeth_l2_request_initial_mac(card);
962 SET_NETDEV_DEV(card->dev, &card->gdev->dev);
963 netif_napi_add(card->dev, &card->napi, qeth_l2_poll, QETH_NAPI_WEIGHT);
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 mutex_lock(&card->discipline_mutex);
975 mutex_lock(&card->conf_mutex);
976 QETH_DBF_TEXT(SETUP, 2, "setonlin");
977 QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
978
979 recover_flag = card->state;
980 rc = qeth_core_hardsetup_card(card);
981 if (rc) {
982 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
983 rc = -ENODEV;
984 goto out_remove;
985 }
986
987 if (!card->dev && qeth_l2_setup_netdev(card)) {
988 rc = -ENODEV;
989 goto out_remove;
990 }
991
992 if (card->info.type != QETH_CARD_TYPE_OSN)
993 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
994
995 if (qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP)) {
996 if (card->info.hwtrap &&
997 qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM))
998 card->info.hwtrap = 0;
999 } else
1000 card->info.hwtrap = 0;
1001
1002 card->state = CARD_STATE_HARDSETUP;
1003 memset(&card->rx, 0, sizeof(struct qeth_rx));
1004 qeth_print_status_message(card);
1005
1006 /* softsetup */
1007 QETH_DBF_TEXT(SETUP, 2, "softsetp");
1008
1009 rc = qeth_send_startlan(card);
1010 if (rc) {
1011 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1012 if (rc == 0xe080) {
1013 dev_warn(&card->gdev->dev,
1014 "The LAN is offline\n");
1015 card->lan_online = 0;
1016 goto contin;
1017 }
1018 rc = -ENODEV;
1019 goto out_remove;
1020 } else
1021 card->lan_online = 1;
1022
1023 contin:
1024 if ((card->info.type == QETH_CARD_TYPE_OSD) ||
1025 (card->info.type == QETH_CARD_TYPE_OSX))
1026 /* configure isolation level */
1027 qeth_set_access_ctrl_online(card);
1028
1029 if (card->info.type != QETH_CARD_TYPE_OSN &&
1030 card->info.type != QETH_CARD_TYPE_OSM)
1031 qeth_l2_process_vlans(card);
1032
1033 netif_tx_disable(card->dev);
1034
1035 rc = qeth_init_qdio_queues(card);
1036 if (rc) {
1037 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1038 rc = -ENODEV;
1039 goto out_remove;
1040 }
1041 card->state = CARD_STATE_SOFTSETUP;
1042 if (card->lan_online)
1043 netif_carrier_on(card->dev);
1044 else
1045 netif_carrier_off(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 mutex_unlock(&card->conf_mutex);
1063 mutex_unlock(&card->discipline_mutex);
1064 return 0;
1065
1066 out_remove:
1067 qeth_l2_stop_card(card, 0);
1068 ccw_device_set_offline(CARD_DDEV(card));
1069 ccw_device_set_offline(CARD_WDEV(card));
1070 ccw_device_set_offline(CARD_RDEV(card));
1071 if (recover_flag == CARD_STATE_RECOVER)
1072 card->state = CARD_STATE_RECOVER;
1073 else
1074 card->state = CARD_STATE_DOWN;
1075 mutex_unlock(&card->conf_mutex);
1076 mutex_unlock(&card->discipline_mutex);
1077 return rc;
1078 }
1079
1080 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1081 {
1082 return __qeth_l2_set_online(gdev, 0);
1083 }
1084
1085 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1086 int recovery_mode)
1087 {
1088 struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1089 int rc = 0, rc2 = 0, rc3 = 0;
1090 enum qeth_card_states recover_flag;
1091
1092 mutex_lock(&card->discipline_mutex);
1093 mutex_lock(&card->conf_mutex);
1094 QETH_DBF_TEXT(SETUP, 3, "setoffl");
1095 QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1096
1097 if (card->dev && netif_carrier_ok(card->dev))
1098 netif_carrier_off(card->dev);
1099 recover_flag = card->state;
1100 if ((!recovery_mode && card->info.hwtrap) || card->info.hwtrap == 2) {
1101 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1102 card->info.hwtrap = 1;
1103 }
1104 qeth_l2_stop_card(card, recovery_mode);
1105 rc = ccw_device_set_offline(CARD_DDEV(card));
1106 rc2 = ccw_device_set_offline(CARD_WDEV(card));
1107 rc3 = ccw_device_set_offline(CARD_RDEV(card));
1108 if (!rc)
1109 rc = (rc2) ? rc2 : rc3;
1110 if (rc)
1111 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1112 if (recover_flag == CARD_STATE_UP)
1113 card->state = CARD_STATE_RECOVER;
1114 /* let user_space know that device is offline */
1115 kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1116 mutex_unlock(&card->conf_mutex);
1117 mutex_unlock(&card->discipline_mutex);
1118 return 0;
1119 }
1120
1121 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1122 {
1123 return __qeth_l2_set_offline(cgdev, 0);
1124 }
1125
1126 static int qeth_l2_recover(void *ptr)
1127 {
1128 struct qeth_card *card;
1129 int rc = 0;
1130
1131 card = (struct qeth_card *) ptr;
1132 QETH_CARD_TEXT(card, 2, "recover1");
1133 if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1134 return 0;
1135 QETH_CARD_TEXT(card, 2, "recover2");
1136 dev_warn(&card->gdev->dev,
1137 "A recovery process has been started for the device\n");
1138 __qeth_l2_set_offline(card->gdev, 1);
1139 rc = __qeth_l2_set_online(card->gdev, 1);
1140 if (!rc)
1141 dev_info(&card->gdev->dev,
1142 "Device successfully recovered!\n");
1143 else {
1144 if (rtnl_trylock()) {
1145 dev_close(card->dev);
1146 rtnl_unlock();
1147 dev_warn(&card->gdev->dev, "The qeth device driver "
1148 "failed to recover an error on the device\n");
1149 }
1150 }
1151 qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1152 qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1153 return 0;
1154 }
1155
1156 static int __init qeth_l2_init(void)
1157 {
1158 pr_info("register layer 2 discipline\n");
1159 return 0;
1160 }
1161
1162 static void __exit qeth_l2_exit(void)
1163 {
1164 pr_info("unregister layer 2 discipline\n");
1165 }
1166
1167 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1168 {
1169 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1170 qeth_set_allowed_threads(card, 0, 1);
1171 if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
1172 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1173 qeth_qdio_clear_card(card, 0);
1174 qeth_clear_qdio_buffers(card);
1175 }
1176
1177 static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev)
1178 {
1179 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1180
1181 if (card->dev)
1182 netif_device_detach(card->dev);
1183 qeth_set_allowed_threads(card, 0, 1);
1184 wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1185 if (gdev->state == CCWGROUP_OFFLINE)
1186 return 0;
1187 if (card->state == CARD_STATE_UP) {
1188 if (card->info.hwtrap)
1189 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1190 __qeth_l2_set_offline(card->gdev, 1);
1191 } else
1192 __qeth_l2_set_offline(card->gdev, 0);
1193 return 0;
1194 }
1195
1196 static int qeth_l2_pm_resume(struct ccwgroup_device *gdev)
1197 {
1198 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1199 int rc = 0;
1200
1201 if (gdev->state == CCWGROUP_OFFLINE)
1202 goto out;
1203
1204 if (card->state == CARD_STATE_RECOVER) {
1205 rc = __qeth_l2_set_online(card->gdev, 1);
1206 if (rc) {
1207 rtnl_lock();
1208 dev_close(card->dev);
1209 rtnl_unlock();
1210 }
1211 } else
1212 rc = __qeth_l2_set_online(card->gdev, 0);
1213 out:
1214 qeth_set_allowed_threads(card, 0xffffffff, 0);
1215 if (card->dev)
1216 netif_device_attach(card->dev);
1217 if (rc)
1218 dev_warn(&card->gdev->dev, "The qeth device driver "
1219 "failed to recover an error on the device\n");
1220 return rc;
1221 }
1222
1223 struct qeth_discipline qeth_l2_discipline = {
1224 .start_poll = qeth_qdio_start_poll,
1225 .input_handler = (qdio_handler_t *) qeth_qdio_input_handler,
1226 .output_handler = (qdio_handler_t *) qeth_qdio_output_handler,
1227 .recover = qeth_l2_recover,
1228 .setup = qeth_l2_probe_device,
1229 .remove = qeth_l2_remove_device,
1230 .set_online = qeth_l2_set_online,
1231 .set_offline = qeth_l2_set_offline,
1232 .shutdown = qeth_l2_shutdown,
1233 .freeze = qeth_l2_pm_suspend,
1234 .thaw = qeth_l2_pm_resume,
1235 .restore = qeth_l2_pm_resume,
1236 };
1237 EXPORT_SYMBOL_GPL(qeth_l2_discipline);
1238
1239 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1240 struct qeth_cmd_buffer *iob)
1241 {
1242 unsigned long flags;
1243 int rc = 0;
1244
1245 QETH_CARD_TEXT(card, 5, "osndctrd");
1246
1247 wait_event(card->wait_q,
1248 atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1249 qeth_prepare_control_data(card, len, iob);
1250 QETH_CARD_TEXT(card, 6, "osnoirqp");
1251 spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1252 rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1253 (addr_t) iob, 0, 0);
1254 spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1255 if (rc) {
1256 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1257 "ccw_device_start rc = %i\n", rc);
1258 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1259 qeth_release_buffer(iob->channel, iob);
1260 atomic_set(&card->write.irq_pending, 0);
1261 wake_up(&card->wait_q);
1262 }
1263 return rc;
1264 }
1265
1266 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1267 struct qeth_cmd_buffer *iob, int data_len)
1268 {
1269 u16 s1, s2;
1270
1271 QETH_CARD_TEXT(card, 4, "osndipa");
1272
1273 qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1274 s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1275 s2 = (u16)data_len;
1276 memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1277 memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1278 memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1279 memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1280 return qeth_osn_send_control_data(card, s1, iob);
1281 }
1282
1283 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1284 {
1285 struct qeth_cmd_buffer *iob;
1286 struct qeth_card *card;
1287 int rc;
1288
1289 if (!dev)
1290 return -ENODEV;
1291 card = dev->ml_priv;
1292 if (!card)
1293 return -ENODEV;
1294 QETH_CARD_TEXT(card, 2, "osnsdmc");
1295 if ((card->state != CARD_STATE_UP) &&
1296 (card->state != CARD_STATE_SOFTSETUP))
1297 return -ENODEV;
1298 iob = qeth_wait_for_buffer(&card->write);
1299 memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1300 rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1301 return rc;
1302 }
1303 EXPORT_SYMBOL(qeth_osn_assist);
1304
1305 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1306 int (*assist_cb)(struct net_device *, void *),
1307 int (*data_cb)(struct sk_buff *))
1308 {
1309 struct qeth_card *card;
1310
1311 *dev = qeth_l2_netdev_by_devno(read_dev_no);
1312 if (*dev == NULL)
1313 return -ENODEV;
1314 card = (*dev)->ml_priv;
1315 if (!card)
1316 return -ENODEV;
1317 QETH_CARD_TEXT(card, 2, "osnreg");
1318 if ((assist_cb == NULL) || (data_cb == NULL))
1319 return -EINVAL;
1320 card->osn_info.assist_cb = assist_cb;
1321 card->osn_info.data_cb = data_cb;
1322 return 0;
1323 }
1324 EXPORT_SYMBOL(qeth_osn_register);
1325
1326 void qeth_osn_deregister(struct net_device *dev)
1327 {
1328 struct qeth_card *card;
1329
1330 if (!dev)
1331 return;
1332 card = dev->ml_priv;
1333 if (!card)
1334 return;
1335 QETH_CARD_TEXT(card, 2, "osndereg");
1336 card->osn_info.assist_cb = NULL;
1337 card->osn_info.data_cb = NULL;
1338 return;
1339 }
1340 EXPORT_SYMBOL(qeth_osn_deregister);
1341
1342 module_init(qeth_l2_init);
1343 module_exit(qeth_l2_exit);
1344 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1345 MODULE_DESCRIPTION("qeth layer 2 discipline");
1346 MODULE_LICENSE("GPL");
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