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Staging: Merge branch 'tidspbridge-for-2.6.39' of git://dev.omapzoom.org/pub/scm...
[deliverable/linux.git] / drivers / s390 / net / qeth_l2_main.c
1 /*
2 * drivers/s390/net/qeth_l2_main.c
3 *
4 * Copyright IBM Corp. 2007, 2009
5 * Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
6 * Frank Pavlic <fpavlic@de.ibm.com>,
7 * Thomas Spatzier <tspat@de.ibm.com>,
8 * Frank Blaschka <frank.blaschka@de.ibm.com>
9 */
10
11 #define KMSG_COMPONENT "qeth"
12 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
13
14 #include <linux/module.h>
15 #include <linux/moduleparam.h>
16 #include <linux/string.h>
17 #include <linux/errno.h>
18 #include <linux/kernel.h>
19 #include <linux/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)
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 (mc->is_vmac)
212 qeth_l2_send_setdelmac(card, mc->mc_addr,
213 IPA_CMD_DELVMAC, NULL);
214 else
215 qeth_l2_send_delgroupmac(card, mc->mc_addr);
216 list_del(&mc->list);
217 kfree(mc);
218 }
219 spin_unlock_bh(&card->mclock);
220 }
221
222 static inline int qeth_l2_get_cast_type(struct qeth_card *card,
223 struct sk_buff *skb)
224 {
225 if (card->info.type == QETH_CARD_TYPE_OSN)
226 return RTN_UNSPEC;
227 if (is_broadcast_ether_addr(skb->data))
228 return RTN_BROADCAST;
229 if (is_multicast_ether_addr(skb->data))
230 return RTN_MULTICAST;
231 return RTN_UNSPEC;
232 }
233
234 static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
235 struct sk_buff *skb, int ipv, int cast_type)
236 {
237 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
238
239 memset(hdr, 0, sizeof(struct qeth_hdr));
240 hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
241
242 /* set byte byte 3 to casting flags */
243 if (cast_type == RTN_MULTICAST)
244 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
245 else if (cast_type == RTN_BROADCAST)
246 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
247 else
248 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
249
250 hdr->hdr.l2.pkt_length = skb->len-QETH_HEADER_SIZE;
251 /* VSWITCH relies on the VLAN
252 * information to be present in
253 * the QDIO header */
254 if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
255 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
256 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
257 }
258 }
259
260 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
261 struct qeth_reply *reply, unsigned long data)
262 {
263 struct qeth_ipa_cmd *cmd;
264
265 QETH_CARD_TEXT(card, 2, "L2sdvcb");
266 cmd = (struct qeth_ipa_cmd *) data;
267 if (cmd->hdr.return_code) {
268 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x. "
269 "Continuing\n", cmd->data.setdelvlan.vlan_id,
270 QETH_CARD_IFNAME(card), cmd->hdr.return_code);
271 QETH_CARD_TEXT_(card, 2, "L2VL%4x", cmd->hdr.command);
272 QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code);
273 }
274 return 0;
275 }
276
277 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
278 enum qeth_ipa_cmds ipacmd)
279 {
280 struct qeth_ipa_cmd *cmd;
281 struct qeth_cmd_buffer *iob;
282
283 QETH_CARD_TEXT_(card, 4, "L2sdv%x", ipacmd);
284 iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
285 cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
286 cmd->data.setdelvlan.vlan_id = i;
287 return qeth_send_ipa_cmd(card, iob,
288 qeth_l2_send_setdelvlan_cb, NULL);
289 }
290
291 static void qeth_l2_process_vlans(struct qeth_card *card, int clear)
292 {
293 struct qeth_vlan_vid *id;
294 QETH_CARD_TEXT(card, 3, "L2prcvln");
295 spin_lock_bh(&card->vlanlock);
296 list_for_each_entry(id, &card->vid_list, list) {
297 if (clear)
298 qeth_l2_send_setdelvlan(card, id->vid,
299 IPA_CMD_DELVLAN);
300 else
301 qeth_l2_send_setdelvlan(card, id->vid,
302 IPA_CMD_SETVLAN);
303 }
304 spin_unlock_bh(&card->vlanlock);
305 }
306
307 static void qeth_l2_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
308 {
309 struct qeth_card *card = dev->ml_priv;
310 struct qeth_vlan_vid *id;
311
312 QETH_CARD_TEXT_(card, 4, "aid:%d", vid);
313 if (!vid)
314 return;
315 if (card->info.type == QETH_CARD_TYPE_OSM) {
316 QETH_CARD_TEXT(card, 3, "aidOSM");
317 return;
318 }
319 if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
320 QETH_CARD_TEXT(card, 3, "aidREC");
321 return;
322 }
323 id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
324 if (id) {
325 id->vid = vid;
326 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
327 spin_lock_bh(&card->vlanlock);
328 list_add_tail(&id->list, &card->vid_list);
329 spin_unlock_bh(&card->vlanlock);
330 }
331 }
332
333 static void qeth_l2_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
334 {
335 struct qeth_vlan_vid *id, *tmpid = NULL;
336 struct qeth_card *card = dev->ml_priv;
337
338 QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
339 if (card->info.type == QETH_CARD_TYPE_OSM) {
340 QETH_CARD_TEXT(card, 3, "kidOSM");
341 return;
342 }
343 if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
344 QETH_CARD_TEXT(card, 3, "kidREC");
345 return;
346 }
347 spin_lock_bh(&card->vlanlock);
348 list_for_each_entry(id, &card->vid_list, list) {
349 if (id->vid == vid) {
350 list_del(&id->list);
351 tmpid = id;
352 break;
353 }
354 }
355 spin_unlock_bh(&card->vlanlock);
356 if (tmpid) {
357 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
358 kfree(tmpid);
359 }
360 qeth_l2_set_multicast_list(card->dev);
361 }
362
363 static int qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
364 {
365 int rc = 0;
366
367 QETH_DBF_TEXT(SETUP , 2, "stopcard");
368 QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
369
370 qeth_set_allowed_threads(card, 0, 1);
371 if (card->read.state == CH_STATE_UP &&
372 card->write.state == CH_STATE_UP &&
373 (card->state == CARD_STATE_UP)) {
374 if (recovery_mode &&
375 card->info.type != QETH_CARD_TYPE_OSN) {
376 qeth_l2_stop(card->dev);
377 } else {
378 rtnl_lock();
379 dev_close(card->dev);
380 rtnl_unlock();
381 }
382 if (!card->use_hard_stop ||
383 recovery_mode) {
384 __u8 *mac = &card->dev->dev_addr[0];
385 rc = qeth_l2_send_delmac(card, mac);
386 QETH_DBF_TEXT_(SETUP, 2, "Lerr%d", rc);
387 }
388 card->state = CARD_STATE_SOFTSETUP;
389 }
390 if (card->state == CARD_STATE_SOFTSETUP) {
391 qeth_l2_process_vlans(card, 1);
392 if (!card->use_hard_stop ||
393 recovery_mode)
394 qeth_l2_del_all_mc(card);
395 qeth_clear_ipacmd_list(card);
396 card->state = CARD_STATE_HARDSETUP;
397 }
398 if (card->state == CARD_STATE_HARDSETUP) {
399 qeth_qdio_clear_card(card, 0);
400 qeth_clear_qdio_buffers(card);
401 qeth_clear_working_pool_list(card);
402 card->state = CARD_STATE_DOWN;
403 }
404 if (card->state == CARD_STATE_DOWN) {
405 qeth_clear_cmd_buffers(&card->read);
406 qeth_clear_cmd_buffers(&card->write);
407 }
408 card->use_hard_stop = 0;
409 return rc;
410 }
411
412 static int qeth_l2_process_inbound_buffer(struct qeth_card *card,
413 int budget, int *done)
414 {
415 int work_done = 0;
416 struct sk_buff *skb;
417 struct qeth_hdr *hdr;
418 unsigned int len;
419
420 *done = 0;
421 BUG_ON(!budget);
422 while (budget) {
423 skb = qeth_core_get_next_skb(card,
424 card->qdio.in_q->bufs[card->rx.b_index].buffer,
425 &card->rx.b_element, &card->rx.e_offset, &hdr);
426 if (!skb) {
427 *done = 1;
428 break;
429 }
430 skb->dev = card->dev;
431 switch (hdr->hdr.l2.id) {
432 case QETH_HEADER_TYPE_LAYER2:
433 skb->pkt_type = PACKET_HOST;
434 skb->protocol = eth_type_trans(skb, skb->dev);
435 if (card->options.checksum_type == NO_CHECKSUMMING)
436 skb->ip_summed = CHECKSUM_UNNECESSARY;
437 else
438 skb->ip_summed = CHECKSUM_NONE;
439 if (skb->protocol == htons(ETH_P_802_2))
440 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
441 len = skb->len;
442 netif_receive_skb(skb);
443 break;
444 case QETH_HEADER_TYPE_OSN:
445 if (card->info.type == QETH_CARD_TYPE_OSN) {
446 skb_push(skb, sizeof(struct qeth_hdr));
447 skb_copy_to_linear_data(skb, hdr,
448 sizeof(struct qeth_hdr));
449 len = skb->len;
450 card->osn_info.data_cb(skb);
451 break;
452 }
453 /* else unknown */
454 default:
455 dev_kfree_skb_any(skb);
456 QETH_CARD_TEXT(card, 3, "inbunkno");
457 QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
458 continue;
459 }
460 work_done++;
461 budget--;
462 card->stats.rx_packets++;
463 card->stats.rx_bytes += len;
464 }
465 return work_done;
466 }
467
468 static int qeth_l2_poll(struct napi_struct *napi, int budget)
469 {
470 struct qeth_card *card = container_of(napi, struct qeth_card, napi);
471 int work_done = 0;
472 struct qeth_qdio_buffer *buffer;
473 int done;
474 int new_budget = budget;
475
476 if (card->options.performance_stats) {
477 card->perf_stats.inbound_cnt++;
478 card->perf_stats.inbound_start_time = qeth_get_micros();
479 }
480
481 while (1) {
482 if (!card->rx.b_count) {
483 card->rx.qdio_err = 0;
484 card->rx.b_count = qdio_get_next_buffers(
485 card->data.ccwdev, 0, &card->rx.b_index,
486 &card->rx.qdio_err);
487 if (card->rx.b_count <= 0) {
488 card->rx.b_count = 0;
489 break;
490 }
491 card->rx.b_element =
492 &card->qdio.in_q->bufs[card->rx.b_index]
493 .buffer->element[0];
494 card->rx.e_offset = 0;
495 }
496
497 while (card->rx.b_count) {
498 buffer = &card->qdio.in_q->bufs[card->rx.b_index];
499 if (!(card->rx.qdio_err &&
500 qeth_check_qdio_errors(card, buffer->buffer,
501 card->rx.qdio_err, "qinerr")))
502 work_done += qeth_l2_process_inbound_buffer(
503 card, new_budget, &done);
504 else
505 done = 1;
506
507 if (done) {
508 if (card->options.performance_stats)
509 card->perf_stats.bufs_rec++;
510 qeth_put_buffer_pool_entry(card,
511 buffer->pool_entry);
512 qeth_queue_input_buffer(card, card->rx.b_index);
513 card->rx.b_count--;
514 if (card->rx.b_count) {
515 card->rx.b_index =
516 (card->rx.b_index + 1) %
517 QDIO_MAX_BUFFERS_PER_Q;
518 card->rx.b_element =
519 &card->qdio.in_q
520 ->bufs[card->rx.b_index]
521 .buffer->element[0];
522 card->rx.e_offset = 0;
523 }
524 }
525
526 if (work_done >= budget)
527 goto out;
528 else
529 new_budget = budget - work_done;
530 }
531 }
532
533 napi_complete(napi);
534 if (qdio_start_irq(card->data.ccwdev, 0))
535 napi_schedule(&card->napi);
536 out:
537 if (card->options.performance_stats)
538 card->perf_stats.inbound_time += qeth_get_micros() -
539 card->perf_stats.inbound_start_time;
540 return work_done;
541 }
542
543 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
544 enum qeth_ipa_cmds ipacmd,
545 int (*reply_cb) (struct qeth_card *,
546 struct qeth_reply*,
547 unsigned long))
548 {
549 struct qeth_ipa_cmd *cmd;
550 struct qeth_cmd_buffer *iob;
551
552 QETH_CARD_TEXT(card, 2, "L2sdmac");
553 iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
554 cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
555 cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
556 memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
557 return qeth_send_ipa_cmd(card, iob, reply_cb, NULL);
558 }
559
560 static int qeth_l2_send_setmac_cb(struct qeth_card *card,
561 struct qeth_reply *reply,
562 unsigned long data)
563 {
564 struct qeth_ipa_cmd *cmd;
565
566 QETH_CARD_TEXT(card, 2, "L2Smaccb");
567 cmd = (struct qeth_ipa_cmd *) data;
568 if (cmd->hdr.return_code) {
569 QETH_CARD_TEXT_(card, 2, "L2er%x", cmd->hdr.return_code);
570 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
571 switch (cmd->hdr.return_code) {
572 case IPA_RC_L2_DUP_MAC:
573 case IPA_RC_L2_DUP_LAYER3_MAC:
574 dev_warn(&card->gdev->dev,
575 "MAC address %pM already exists\n",
576 card->dev->dev_addr);
577 break;
578 case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
579 case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
580 dev_warn(&card->gdev->dev,
581 "MAC address %pM is not authorized\n",
582 card->dev->dev_addr);
583 break;
584 default:
585 break;
586 }
587 cmd->hdr.return_code = -EIO;
588 } else {
589 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
590 memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac,
591 OSA_ADDR_LEN);
592 dev_info(&card->gdev->dev,
593 "MAC address %pM successfully registered on device %s\n",
594 card->dev->dev_addr, card->dev->name);
595 }
596 return 0;
597 }
598
599 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
600 {
601 QETH_CARD_TEXT(card, 2, "L2Setmac");
602 return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
603 qeth_l2_send_setmac_cb);
604 }
605
606 static int qeth_l2_send_delmac_cb(struct qeth_card *card,
607 struct qeth_reply *reply,
608 unsigned long data)
609 {
610 struct qeth_ipa_cmd *cmd;
611
612 QETH_CARD_TEXT(card, 2, "L2Dmaccb");
613 cmd = (struct qeth_ipa_cmd *) data;
614 if (cmd->hdr.return_code) {
615 QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code);
616 cmd->hdr.return_code = -EIO;
617 return 0;
618 }
619 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
620
621 return 0;
622 }
623
624 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
625 {
626 QETH_CARD_TEXT(card, 2, "L2Delmac");
627 if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
628 return 0;
629 return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC,
630 qeth_l2_send_delmac_cb);
631 }
632
633 static int qeth_l2_request_initial_mac(struct qeth_card *card)
634 {
635 int rc = 0;
636 char vendor_pre[] = {0x02, 0x00, 0x00};
637
638 QETH_DBF_TEXT(SETUP, 2, "doL2init");
639 QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
640
641 rc = qeth_query_setadapterparms(card);
642 if (rc) {
643 QETH_DBF_MESSAGE(2, "could not query adapter parameters on "
644 "device %s: x%x\n", CARD_BUS_ID(card), rc);
645 }
646
647 if (card->info.type == QETH_CARD_TYPE_IQD ||
648 card->info.type == QETH_CARD_TYPE_OSM ||
649 card->info.type == QETH_CARD_TYPE_OSX ||
650 card->info.guestlan) {
651 rc = qeth_setadpparms_change_macaddr(card);
652 if (rc) {
653 QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
654 "device %s: x%x\n", CARD_BUS_ID(card), rc);
655 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
656 return rc;
657 }
658 QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN);
659 } else {
660 random_ether_addr(card->dev->dev_addr);
661 memcpy(card->dev->dev_addr, vendor_pre, 3);
662 }
663 return 0;
664 }
665
666 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
667 {
668 struct sockaddr *addr = p;
669 struct qeth_card *card = dev->ml_priv;
670 int rc = 0;
671
672 QETH_CARD_TEXT(card, 3, "setmac");
673
674 if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
675 QETH_CARD_TEXT(card, 3, "setmcINV");
676 return -EOPNOTSUPP;
677 }
678
679 if (card->info.type == QETH_CARD_TYPE_OSN ||
680 card->info.type == QETH_CARD_TYPE_OSM ||
681 card->info.type == QETH_CARD_TYPE_OSX) {
682 QETH_CARD_TEXT(card, 3, "setmcTYP");
683 return -EOPNOTSUPP;
684 }
685 QETH_CARD_HEX(card, 3, addr->sa_data, OSA_ADDR_LEN);
686 if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
687 QETH_CARD_TEXT(card, 3, "setmcREC");
688 return -ERESTARTSYS;
689 }
690 rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
691 if (!rc)
692 rc = qeth_l2_send_setmac(card, addr->sa_data);
693 return rc;
694 }
695
696 static void qeth_l2_set_multicast_list(struct net_device *dev)
697 {
698 struct qeth_card *card = dev->ml_priv;
699 struct netdev_hw_addr *ha;
700
701 if (card->info.type == QETH_CARD_TYPE_OSN)
702 return ;
703
704 QETH_CARD_TEXT(card, 3, "setmulti");
705 if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
706 (card->state != CARD_STATE_UP))
707 return;
708 qeth_l2_del_all_mc(card);
709 spin_lock_bh(&card->mclock);
710 netdev_for_each_mc_addr(ha, dev)
711 qeth_l2_add_mc(card, ha->addr, 0);
712
713 netdev_for_each_uc_addr(ha, dev)
714 qeth_l2_add_mc(card, ha->addr, 1);
715
716 spin_unlock_bh(&card->mclock);
717 if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
718 return;
719 qeth_setadp_promisc_mode(card);
720 }
721
722 static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
723 {
724 int rc;
725 struct qeth_hdr *hdr = NULL;
726 int elements = 0;
727 struct qeth_card *card = dev->ml_priv;
728 struct sk_buff *new_skb = skb;
729 int ipv = qeth_get_ip_version(skb);
730 int cast_type = qeth_l2_get_cast_type(card, skb);
731 struct qeth_qdio_out_q *queue = card->qdio.out_qs
732 [qeth_get_priority_queue(card, skb, ipv, cast_type)];
733 int tx_bytes = skb->len;
734 int data_offset = -1;
735 int elements_needed = 0;
736 int hd_len = 0;
737
738 if ((card->state != CARD_STATE_UP) || !card->lan_online) {
739 card->stats.tx_carrier_errors++;
740 goto tx_drop;
741 }
742
743 if ((card->info.type == QETH_CARD_TYPE_OSN) &&
744 (skb->protocol == htons(ETH_P_IPV6)))
745 goto tx_drop;
746
747 if (card->options.performance_stats) {
748 card->perf_stats.outbound_cnt++;
749 card->perf_stats.outbound_start_time = qeth_get_micros();
750 }
751 netif_stop_queue(dev);
752
753 if (card->info.type == QETH_CARD_TYPE_OSN)
754 hdr = (struct qeth_hdr *)skb->data;
755 else {
756 if (card->info.type == QETH_CARD_TYPE_IQD) {
757 new_skb = skb;
758 data_offset = ETH_HLEN;
759 hd_len = ETH_HLEN;
760 hdr = kmem_cache_alloc(qeth_core_header_cache,
761 GFP_ATOMIC);
762 if (!hdr)
763 goto tx_drop;
764 elements_needed++;
765 skb_reset_mac_header(new_skb);
766 qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
767 hdr->hdr.l2.pkt_length = new_skb->len;
768 memcpy(((char *)hdr) + sizeof(struct qeth_hdr),
769 skb_mac_header(new_skb), ETH_HLEN);
770 } else {
771 /* create a clone with writeable headroom */
772 new_skb = skb_realloc_headroom(skb,
773 sizeof(struct qeth_hdr));
774 if (!new_skb)
775 goto tx_drop;
776 hdr = (struct qeth_hdr *)skb_push(new_skb,
777 sizeof(struct qeth_hdr));
778 skb_set_mac_header(new_skb, sizeof(struct qeth_hdr));
779 qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
780 }
781 }
782
783 elements = qeth_get_elements_no(card, (void *)hdr, new_skb,
784 elements_needed);
785 if (!elements) {
786 if (data_offset >= 0)
787 kmem_cache_free(qeth_core_header_cache, hdr);
788 goto tx_drop;
789 }
790
791 if (card->info.type != QETH_CARD_TYPE_IQD) {
792 if (qeth_hdr_chk_and_bounce(new_skb,
793 sizeof(struct qeth_hdr_layer2)))
794 goto tx_drop;
795 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
796 elements);
797 } else
798 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
799 elements, data_offset, hd_len);
800 if (!rc) {
801 card->stats.tx_packets++;
802 card->stats.tx_bytes += tx_bytes;
803 if (new_skb != skb)
804 dev_kfree_skb_any(skb);
805 rc = NETDEV_TX_OK;
806 } else {
807 if (data_offset >= 0)
808 kmem_cache_free(qeth_core_header_cache, hdr);
809
810 if (rc == -EBUSY) {
811 if (new_skb != skb)
812 dev_kfree_skb_any(new_skb);
813 return NETDEV_TX_BUSY;
814 } else
815 goto tx_drop;
816 }
817
818 netif_wake_queue(dev);
819 if (card->options.performance_stats)
820 card->perf_stats.outbound_time += qeth_get_micros() -
821 card->perf_stats.outbound_start_time;
822 return rc;
823
824 tx_drop:
825 card->stats.tx_dropped++;
826 card->stats.tx_errors++;
827 if ((new_skb != skb) && new_skb)
828 dev_kfree_skb_any(new_skb);
829 dev_kfree_skb_any(skb);
830 netif_wake_queue(dev);
831 return NETDEV_TX_OK;
832 }
833
834 static int __qeth_l2_open(struct net_device *dev)
835 {
836 struct qeth_card *card = dev->ml_priv;
837 int rc = 0;
838
839 QETH_CARD_TEXT(card, 4, "qethopen");
840 if (card->state == CARD_STATE_UP)
841 return rc;
842 if (card->state != CARD_STATE_SOFTSETUP)
843 return -ENODEV;
844
845 if ((card->info.type != QETH_CARD_TYPE_OSN) &&
846 (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
847 QETH_CARD_TEXT(card, 4, "nomacadr");
848 return -EPERM;
849 }
850 card->data.state = CH_STATE_UP;
851 card->state = CARD_STATE_UP;
852 netif_start_queue(dev);
853
854 if (qdio_stop_irq(card->data.ccwdev, 0) >= 0) {
855 napi_enable(&card->napi);
856 napi_schedule(&card->napi);
857 } else
858 rc = -EIO;
859 return rc;
860 }
861
862 static int qeth_l2_open(struct net_device *dev)
863 {
864 struct qeth_card *card = dev->ml_priv;
865
866 QETH_CARD_TEXT(card, 5, "qethope_");
867 if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
868 QETH_CARD_TEXT(card, 3, "openREC");
869 return -ERESTARTSYS;
870 }
871 return __qeth_l2_open(dev);
872 }
873
874 static int qeth_l2_stop(struct net_device *dev)
875 {
876 struct qeth_card *card = dev->ml_priv;
877
878 QETH_CARD_TEXT(card, 4, "qethstop");
879 netif_tx_disable(dev);
880 if (card->state == CARD_STATE_UP) {
881 card->state = CARD_STATE_SOFTSETUP;
882 napi_disable(&card->napi);
883 }
884 return 0;
885 }
886
887 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
888 {
889 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
890
891 INIT_LIST_HEAD(&card->vid_list);
892 INIT_LIST_HEAD(&card->mc_list);
893 card->options.layer2 = 1;
894 card->discipline.start_poll = qeth_qdio_start_poll;
895 card->discipline.input_handler = (qdio_handler_t *)
896 qeth_qdio_input_handler;
897 card->discipline.output_handler = (qdio_handler_t *)
898 qeth_qdio_output_handler;
899 card->discipline.recover = qeth_l2_recover;
900 return 0;
901 }
902
903 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
904 {
905 struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
906
907 qeth_set_allowed_threads(card, 0, 1);
908 wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
909
910 if (cgdev->state == CCWGROUP_ONLINE) {
911 card->use_hard_stop = 1;
912 qeth_l2_set_offline(cgdev);
913 }
914
915 if (card->dev) {
916 unregister_netdev(card->dev);
917 card->dev = NULL;
918 }
919 return;
920 }
921
922 static const struct ethtool_ops qeth_l2_ethtool_ops = {
923 .get_link = ethtool_op_get_link,
924 .get_strings = qeth_core_get_strings,
925 .get_ethtool_stats = qeth_core_get_ethtool_stats,
926 .get_sset_count = qeth_core_get_sset_count,
927 .get_drvinfo = qeth_core_get_drvinfo,
928 .get_settings = qeth_core_ethtool_get_settings,
929 };
930
931 static const struct ethtool_ops qeth_l2_osn_ops = {
932 .get_strings = qeth_core_get_strings,
933 .get_ethtool_stats = qeth_core_get_ethtool_stats,
934 .get_sset_count = qeth_core_get_sset_count,
935 .get_drvinfo = qeth_core_get_drvinfo,
936 };
937
938 static const struct net_device_ops qeth_l2_netdev_ops = {
939 .ndo_open = qeth_l2_open,
940 .ndo_stop = qeth_l2_stop,
941 .ndo_get_stats = qeth_get_stats,
942 .ndo_start_xmit = qeth_l2_hard_start_xmit,
943 .ndo_validate_addr = eth_validate_addr,
944 .ndo_set_multicast_list = qeth_l2_set_multicast_list,
945 .ndo_do_ioctl = qeth_l2_do_ioctl,
946 .ndo_set_mac_address = qeth_l2_set_mac_address,
947 .ndo_change_mtu = qeth_change_mtu,
948 .ndo_vlan_rx_add_vid = qeth_l2_vlan_rx_add_vid,
949 .ndo_vlan_rx_kill_vid = qeth_l2_vlan_rx_kill_vid,
950 .ndo_tx_timeout = qeth_tx_timeout,
951 };
952
953 static int qeth_l2_setup_netdev(struct qeth_card *card)
954 {
955 switch (card->info.type) {
956 case QETH_CARD_TYPE_IQD:
957 card->dev = alloc_netdev(0, "hsi%d", ether_setup);
958 break;
959 case QETH_CARD_TYPE_OSN:
960 card->dev = alloc_netdev(0, "osn%d", ether_setup);
961 card->dev->flags |= IFF_NOARP;
962 break;
963 default:
964 card->dev = alloc_etherdev(0);
965 }
966
967 if (!card->dev)
968 return -ENODEV;
969
970 card->dev->ml_priv = card;
971 card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
972 card->dev->mtu = card->info.initial_mtu;
973 card->dev->netdev_ops = &qeth_l2_netdev_ops;
974 if (card->info.type != QETH_CARD_TYPE_OSN)
975 SET_ETHTOOL_OPS(card->dev, &qeth_l2_ethtool_ops);
976 else
977 SET_ETHTOOL_OPS(card->dev, &qeth_l2_osn_ops);
978 card->dev->features |= NETIF_F_HW_VLAN_FILTER;
979 card->info.broadcast_capable = 1;
980 qeth_l2_request_initial_mac(card);
981 SET_NETDEV_DEV(card->dev, &card->gdev->dev);
982 netif_napi_add(card->dev, &card->napi, qeth_l2_poll, QETH_NAPI_WEIGHT);
983 return register_netdev(card->dev);
984 }
985
986 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
987 {
988 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
989 int rc = 0;
990 enum qeth_card_states recover_flag;
991
992 BUG_ON(!card);
993 mutex_lock(&card->discipline_mutex);
994 mutex_lock(&card->conf_mutex);
995 QETH_DBF_TEXT(SETUP, 2, "setonlin");
996 QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
997
998 recover_flag = card->state;
999 rc = qeth_core_hardsetup_card(card);
1000 if (rc) {
1001 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
1002 rc = -ENODEV;
1003 goto out_remove;
1004 }
1005
1006 if (!card->dev && qeth_l2_setup_netdev(card)) {
1007 rc = -ENODEV;
1008 goto out_remove;
1009 }
1010
1011 if (card->info.type != QETH_CARD_TYPE_OSN)
1012 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
1013
1014 card->state = CARD_STATE_HARDSETUP;
1015 memset(&card->rx, 0, sizeof(struct qeth_rx));
1016 qeth_print_status_message(card);
1017
1018 /* softsetup */
1019 QETH_DBF_TEXT(SETUP, 2, "softsetp");
1020
1021 rc = qeth_send_startlan(card);
1022 if (rc) {
1023 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1024 if (rc == 0xe080) {
1025 dev_warn(&card->gdev->dev,
1026 "The LAN is offline\n");
1027 card->lan_online = 0;
1028 goto contin;
1029 }
1030 rc = -ENODEV;
1031 goto out_remove;
1032 } else
1033 card->lan_online = 1;
1034
1035 contin:
1036 if ((card->info.type == QETH_CARD_TYPE_OSD) ||
1037 (card->info.type == QETH_CARD_TYPE_OSX))
1038 /* configure isolation level */
1039 qeth_set_access_ctrl_online(card);
1040
1041 if (card->info.type != QETH_CARD_TYPE_OSN &&
1042 card->info.type != QETH_CARD_TYPE_OSM)
1043 qeth_l2_process_vlans(card, 0);
1044
1045 netif_tx_disable(card->dev);
1046
1047 rc = qeth_init_qdio_queues(card);
1048 if (rc) {
1049 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1050 rc = -ENODEV;
1051 goto out_remove;
1052 }
1053 card->state = CARD_STATE_SOFTSETUP;
1054 if (card->lan_online)
1055 netif_carrier_on(card->dev);
1056 else
1057 netif_carrier_off(card->dev);
1058
1059 qeth_set_allowed_threads(card, 0xffffffff, 0);
1060 if (recover_flag == CARD_STATE_RECOVER) {
1061 if (recovery_mode &&
1062 card->info.type != QETH_CARD_TYPE_OSN) {
1063 __qeth_l2_open(card->dev);
1064 } else {
1065 rtnl_lock();
1066 dev_open(card->dev);
1067 rtnl_unlock();
1068 }
1069 /* this also sets saved unicast addresses */
1070 qeth_l2_set_multicast_list(card->dev);
1071 }
1072 /* let user_space know that device is online */
1073 kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1074 mutex_unlock(&card->conf_mutex);
1075 mutex_unlock(&card->discipline_mutex);
1076 return 0;
1077
1078 out_remove:
1079 card->use_hard_stop = 1;
1080 qeth_l2_stop_card(card, 0);
1081 ccw_device_set_offline(CARD_DDEV(card));
1082 ccw_device_set_offline(CARD_WDEV(card));
1083 ccw_device_set_offline(CARD_RDEV(card));
1084 if (recover_flag == CARD_STATE_RECOVER)
1085 card->state = CARD_STATE_RECOVER;
1086 else
1087 card->state = CARD_STATE_DOWN;
1088 mutex_unlock(&card->conf_mutex);
1089 mutex_unlock(&card->discipline_mutex);
1090 return rc;
1091 }
1092
1093 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1094 {
1095 return __qeth_l2_set_online(gdev, 0);
1096 }
1097
1098 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1099 int recovery_mode)
1100 {
1101 struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1102 int rc = 0, rc2 = 0, rc3 = 0;
1103 enum qeth_card_states recover_flag;
1104
1105 mutex_lock(&card->discipline_mutex);
1106 mutex_lock(&card->conf_mutex);
1107 QETH_DBF_TEXT(SETUP, 3, "setoffl");
1108 QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1109
1110 if (card->dev && netif_carrier_ok(card->dev))
1111 netif_carrier_off(card->dev);
1112 recover_flag = card->state;
1113 qeth_l2_stop_card(card, recovery_mode);
1114 rc = ccw_device_set_offline(CARD_DDEV(card));
1115 rc2 = ccw_device_set_offline(CARD_WDEV(card));
1116 rc3 = ccw_device_set_offline(CARD_RDEV(card));
1117 if (!rc)
1118 rc = (rc2) ? rc2 : rc3;
1119 if (rc)
1120 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1121 if (recover_flag == CARD_STATE_UP)
1122 card->state = CARD_STATE_RECOVER;
1123 /* let user_space know that device is offline */
1124 kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1125 mutex_unlock(&card->conf_mutex);
1126 mutex_unlock(&card->discipline_mutex);
1127 return 0;
1128 }
1129
1130 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1131 {
1132 return __qeth_l2_set_offline(cgdev, 0);
1133 }
1134
1135 static int qeth_l2_recover(void *ptr)
1136 {
1137 struct qeth_card *card;
1138 int rc = 0;
1139
1140 card = (struct qeth_card *) ptr;
1141 QETH_CARD_TEXT(card, 2, "recover1");
1142 if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1143 return 0;
1144 QETH_CARD_TEXT(card, 2, "recover2");
1145 dev_warn(&card->gdev->dev,
1146 "A recovery process has been started for the device\n");
1147 card->use_hard_stop = 1;
1148 __qeth_l2_set_offline(card->gdev, 1);
1149 rc = __qeth_l2_set_online(card->gdev, 1);
1150 if (!rc)
1151 dev_info(&card->gdev->dev,
1152 "Device successfully recovered!\n");
1153 else {
1154 rtnl_lock();
1155 dev_close(card->dev);
1156 rtnl_unlock();
1157 dev_warn(&card->gdev->dev, "The qeth device driver "
1158 "failed to recover an error on the device\n");
1159 }
1160 qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1161 qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1162 return 0;
1163 }
1164
1165 static int __init qeth_l2_init(void)
1166 {
1167 pr_info("register layer 2 discipline\n");
1168 return 0;
1169 }
1170
1171 static void __exit qeth_l2_exit(void)
1172 {
1173 pr_info("unregister layer 2 discipline\n");
1174 }
1175
1176 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1177 {
1178 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1179 qeth_qdio_clear_card(card, 0);
1180 qeth_clear_qdio_buffers(card);
1181 }
1182
1183 static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev)
1184 {
1185 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1186
1187 if (card->dev)
1188 netif_device_detach(card->dev);
1189 qeth_set_allowed_threads(card, 0, 1);
1190 wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1191 if (gdev->state == CCWGROUP_OFFLINE)
1192 return 0;
1193 if (card->state == CARD_STATE_UP) {
1194 card->use_hard_stop = 1;
1195 __qeth_l2_set_offline(card->gdev, 1);
1196 } else
1197 __qeth_l2_set_offline(card->gdev, 0);
1198 return 0;
1199 }
1200
1201 static int qeth_l2_pm_resume(struct ccwgroup_device *gdev)
1202 {
1203 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1204 int rc = 0;
1205
1206 if (gdev->state == CCWGROUP_OFFLINE)
1207 goto out;
1208
1209 if (card->state == CARD_STATE_RECOVER) {
1210 rc = __qeth_l2_set_online(card->gdev, 1);
1211 if (rc) {
1212 rtnl_lock();
1213 dev_close(card->dev);
1214 rtnl_unlock();
1215 }
1216 } else
1217 rc = __qeth_l2_set_online(card->gdev, 0);
1218 out:
1219 qeth_set_allowed_threads(card, 0xffffffff, 0);
1220 if (card->dev)
1221 netif_device_attach(card->dev);
1222 if (rc)
1223 dev_warn(&card->gdev->dev, "The qeth device driver "
1224 "failed to recover an error on the device\n");
1225 return rc;
1226 }
1227
1228 struct ccwgroup_driver qeth_l2_ccwgroup_driver = {
1229 .probe = qeth_l2_probe_device,
1230 .remove = qeth_l2_remove_device,
1231 .set_online = qeth_l2_set_online,
1232 .set_offline = qeth_l2_set_offline,
1233 .shutdown = qeth_l2_shutdown,
1234 .freeze = qeth_l2_pm_suspend,
1235 .thaw = qeth_l2_pm_resume,
1236 .restore = qeth_l2_pm_resume,
1237 };
1238 EXPORT_SYMBOL_GPL(qeth_l2_ccwgroup_driver);
1239
1240 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1241 struct qeth_cmd_buffer *iob)
1242 {
1243 unsigned long flags;
1244 int rc = 0;
1245
1246 QETH_CARD_TEXT(card, 5, "osndctrd");
1247
1248 wait_event(card->wait_q,
1249 atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1250 qeth_prepare_control_data(card, len, iob);
1251 QETH_CARD_TEXT(card, 6, "osnoirqp");
1252 spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1253 rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1254 (addr_t) iob, 0, 0);
1255 spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1256 if (rc) {
1257 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1258 "ccw_device_start rc = %i\n", rc);
1259 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1260 qeth_release_buffer(iob->channel, iob);
1261 atomic_set(&card->write.irq_pending, 0);
1262 wake_up(&card->wait_q);
1263 }
1264 return rc;
1265 }
1266
1267 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1268 struct qeth_cmd_buffer *iob, int data_len)
1269 {
1270 u16 s1, s2;
1271
1272 QETH_CARD_TEXT(card, 4, "osndipa");
1273
1274 qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1275 s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1276 s2 = (u16)data_len;
1277 memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1278 memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1279 memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1280 memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1281 return qeth_osn_send_control_data(card, s1, iob);
1282 }
1283
1284 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1285 {
1286 struct qeth_cmd_buffer *iob;
1287 struct qeth_card *card;
1288 int rc;
1289
1290 if (!dev)
1291 return -ENODEV;
1292 card = dev->ml_priv;
1293 if (!card)
1294 return -ENODEV;
1295 QETH_CARD_TEXT(card, 2, "osnsdmc");
1296 if ((card->state != CARD_STATE_UP) &&
1297 (card->state != CARD_STATE_SOFTSETUP))
1298 return -ENODEV;
1299 iob = qeth_wait_for_buffer(&card->write);
1300 memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1301 rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1302 return rc;
1303 }
1304 EXPORT_SYMBOL(qeth_osn_assist);
1305
1306 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1307 int (*assist_cb)(struct net_device *, void *),
1308 int (*data_cb)(struct sk_buff *))
1309 {
1310 struct qeth_card *card;
1311
1312 *dev = qeth_l2_netdev_by_devno(read_dev_no);
1313 if (*dev == NULL)
1314 return -ENODEV;
1315 card = (*dev)->ml_priv;
1316 if (!card)
1317 return -ENODEV;
1318 QETH_CARD_TEXT(card, 2, "osnreg");
1319 if ((assist_cb == NULL) || (data_cb == NULL))
1320 return -EINVAL;
1321 card->osn_info.assist_cb = assist_cb;
1322 card->osn_info.data_cb = data_cb;
1323 return 0;
1324 }
1325 EXPORT_SYMBOL(qeth_osn_register);
1326
1327 void qeth_osn_deregister(struct net_device *dev)
1328 {
1329 struct qeth_card *card;
1330
1331 if (!dev)
1332 return;
1333 card = dev->ml_priv;
1334 if (!card)
1335 return;
1336 QETH_CARD_TEXT(card, 2, "osndereg");
1337 card->osn_info.assist_cb = NULL;
1338 card->osn_info.data_cb = NULL;
1339 return;
1340 }
1341 EXPORT_SYMBOL(qeth_osn_deregister);
1342
1343 module_init(qeth_l2_init);
1344 module_exit(qeth_l2_exit);
1345 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1346 MODULE_DESCRIPTION("qeth layer 2 discipline");
1347 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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