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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
27static int qeth_l2_set_offline(struct ccwgroup_device *);
28static int qeth_l2_stop(struct net_device *);
29static int qeth_l2_send_delmac(struct qeth_card *, __u8 *);
30static 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));
35static void qeth_l2_set_multicast_list(struct net_device *);
36static int qeth_l2_recover(void *);
37
38static 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
86static 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
104static 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
126static 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
148static 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
155static 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
171static 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
178static 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
205static 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
224static 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
236static 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
262static 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
279static 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
293static 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
304static 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
330static 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
360static 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
400static 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].buffer,
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
453static 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);
521out:
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
528static 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
545static 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
584static 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
591static 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
609static 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
618static 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
651static 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
681static 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
707static 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
809tx_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
819static 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
847static 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
859static 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
872static 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
889static 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
906static 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
915static 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
922static 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_multicast_list = 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
937static 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
970static 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
1026contin:
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
1069out_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
1083static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1084{
1085 return __qeth_l2_set_online(gdev, 0);
1086}
1087
1088static 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
1124static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1125{
1126 return __qeth_l2_set_offline(cgdev, 0);
1127}
1128
1129static 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
1158static int __init qeth_l2_init(void)
1159{
1160 pr_info("register layer 2 discipline\n");
1161 return 0;
1162}
1163
1164static void __exit qeth_l2_exit(void)
1165{
1166 pr_info("unregister layer 2 discipline\n");
1167}
1168
1169static 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
1178static 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
1197static 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);
1214out:
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
1224struct 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};
1234EXPORT_SYMBOL_GPL(qeth_l2_ccwgroup_driver);
1235
1236static 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
1263static 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
1280int 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}
1300EXPORT_SYMBOL(qeth_osn_assist);
1301
1302int 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}
1321EXPORT_SYMBOL(qeth_osn_register);
1322
1323void 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}
1337EXPORT_SYMBOL(qeth_osn_deregister);
1338
1339module_init(qeth_l2_init);
1340module_exit(qeth_l2_exit);
1341MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1342MODULE_DESCRIPTION("qeth layer 2 discipline");
1343MODULE_LICENSE("GPL");
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright IBM Corp. 2007, 2009
4 * Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
5 * Frank Pavlic <fpavlic@de.ibm.com>,
6 * Thomas Spatzier <tspat@de.ibm.com>,
7 * Frank Blaschka <frank.blaschka@de.ibm.com>
8 */
9
10#define KMSG_COMPONENT "qeth"
11#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
12
13#include <linux/module.h>
14#include <linux/moduleparam.h>
15#include <linux/string.h>
16#include <linux/errno.h>
17#include <linux/kernel.h>
18#include <linux/slab.h>
19#include <linux/etherdevice.h>
20#include <linux/list.h>
21#include <linux/hash.h>
22#include <linux/hashtable.h>
23#include <asm/chsc.h>
24#include <asm/setup.h>
25#include "qeth_core.h"
26#include "qeth_l2.h"
27
28static void qeth_bridgeport_query_support(struct qeth_card *card);
29static void qeth_bridge_state_change(struct qeth_card *card,
30 struct qeth_ipa_cmd *cmd);
31static void qeth_addr_change_event(struct qeth_card *card,
32 struct qeth_ipa_cmd *cmd);
33static void qeth_l2_vnicc_set_defaults(struct qeth_card *card);
34static void qeth_l2_vnicc_init(struct qeth_card *card);
35static bool qeth_l2_vnicc_recover_timeout(struct qeth_card *card, u32 vnicc,
36 u32 *timeout);
37
38static int qeth_l2_setdelmac_makerc(struct qeth_card *card, u16 retcode)
39{
40 int rc;
41
42 if (retcode)
43 QETH_CARD_TEXT_(card, 2, "err%04x", retcode);
44 switch (retcode) {
45 case IPA_RC_SUCCESS:
46 rc = 0;
47 break;
48 case IPA_RC_L2_UNSUPPORTED_CMD:
49 rc = -EOPNOTSUPP;
50 break;
51 case IPA_RC_L2_ADDR_TABLE_FULL:
52 rc = -ENOSPC;
53 break;
54 case IPA_RC_L2_DUP_MAC:
55 case IPA_RC_L2_DUP_LAYER3_MAC:
56 rc = -EADDRINUSE;
57 break;
58 case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
59 case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
60 rc = -EADDRNOTAVAIL;
61 break;
62 case IPA_RC_L2_MAC_NOT_FOUND:
63 rc = -ENOENT;
64 break;
65 default:
66 rc = -EIO;
67 break;
68 }
69 return rc;
70}
71
72static int qeth_l2_send_setdelmac_cb(struct qeth_card *card,
73 struct qeth_reply *reply,
74 unsigned long data)
75{
76 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
77
78 return qeth_l2_setdelmac_makerc(card, cmd->hdr.return_code);
79}
80
81static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
82 enum qeth_ipa_cmds ipacmd)
83{
84 struct qeth_ipa_cmd *cmd;
85 struct qeth_cmd_buffer *iob;
86
87 QETH_CARD_TEXT(card, 2, "L2sdmac");
88 iob = qeth_ipa_alloc_cmd(card, ipacmd, QETH_PROT_IPV4,
89 IPA_DATA_SIZEOF(setdelmac));
90 if (!iob)
91 return -ENOMEM;
92 cmd = __ipa_cmd(iob);
93 cmd->data.setdelmac.mac_length = ETH_ALEN;
94 ether_addr_copy(cmd->data.setdelmac.mac, mac);
95 return qeth_send_ipa_cmd(card, iob, qeth_l2_send_setdelmac_cb, NULL);
96}
97
98static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
99{
100 int rc;
101
102 QETH_CARD_TEXT(card, 2, "L2Setmac");
103 rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC);
104 if (rc == 0) {
105 dev_info(&card->gdev->dev,
106 "MAC address %pM successfully registered\n", mac);
107 } else {
108 switch (rc) {
109 case -EADDRINUSE:
110 dev_warn(&card->gdev->dev,
111 "MAC address %pM already exists\n", mac);
112 break;
113 case -EADDRNOTAVAIL:
114 dev_warn(&card->gdev->dev,
115 "MAC address %pM is not authorized\n", mac);
116 break;
117 }
118 }
119 return rc;
120}
121
122static int qeth_l2_write_mac(struct qeth_card *card, u8 *mac)
123{
124 enum qeth_ipa_cmds cmd = is_multicast_ether_addr(mac) ?
125 IPA_CMD_SETGMAC : IPA_CMD_SETVMAC;
126 int rc;
127
128 QETH_CARD_TEXT(card, 2, "L2Wmac");
129 rc = qeth_l2_send_setdelmac(card, mac, cmd);
130 if (rc == -EADDRINUSE)
131 QETH_DBF_MESSAGE(2, "MAC already registered on device %x\n",
132 CARD_DEVID(card));
133 else if (rc)
134 QETH_DBF_MESSAGE(2, "Failed to register MAC on device %x: %d\n",
135 CARD_DEVID(card), rc);
136 return rc;
137}
138
139static int qeth_l2_remove_mac(struct qeth_card *card, u8 *mac)
140{
141 enum qeth_ipa_cmds cmd = is_multicast_ether_addr(mac) ?
142 IPA_CMD_DELGMAC : IPA_CMD_DELVMAC;
143 int rc;
144
145 QETH_CARD_TEXT(card, 2, "L2Rmac");
146 rc = qeth_l2_send_setdelmac(card, mac, cmd);
147 if (rc)
148 QETH_DBF_MESSAGE(2, "Failed to delete MAC on device %u: %d\n",
149 CARD_DEVID(card), rc);
150 return rc;
151}
152
153static void qeth_l2_drain_rx_mode_cache(struct qeth_card *card)
154{
155 struct qeth_mac *mac;
156 struct hlist_node *tmp;
157 int i;
158
159 hash_for_each_safe(card->rx_mode_addrs, i, tmp, mac, hnode) {
160 hash_del(&mac->hnode);
161 kfree(mac);
162 }
163}
164
165static void qeth_l2_fill_header(struct qeth_qdio_out_q *queue,
166 struct qeth_hdr *hdr, struct sk_buff *skb,
167 int ipv, unsigned int data_len)
168{
169 int cast_type = qeth_get_ether_cast_type(skb);
170 struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
171
172 hdr->hdr.l2.pkt_length = data_len;
173
174 if (skb_is_gso(skb)) {
175 hdr->hdr.l2.id = QETH_HEADER_TYPE_L2_TSO;
176 } else {
177 hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
178 if (skb->ip_summed == CHECKSUM_PARTIAL)
179 qeth_tx_csum(skb, &hdr->hdr.l2.flags[1], ipv);
180 }
181
182 /* set byte byte 3 to casting flags */
183 if (cast_type == RTN_MULTICAST)
184 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
185 else if (cast_type == RTN_BROADCAST)
186 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
187 else
188 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
189
190 /* VSWITCH relies on the VLAN
191 * information to be present in
192 * the QDIO header */
193 if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
194 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
195 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
196 }
197}
198
199static int qeth_l2_setdelvlan_makerc(struct qeth_card *card, u16 retcode)
200{
201 if (retcode)
202 QETH_CARD_TEXT_(card, 2, "err%04x", retcode);
203
204 switch (retcode) {
205 case IPA_RC_SUCCESS:
206 return 0;
207 case IPA_RC_L2_INVALID_VLAN_ID:
208 return -EINVAL;
209 case IPA_RC_L2_DUP_VLAN_ID:
210 return -EEXIST;
211 case IPA_RC_L2_VLAN_ID_NOT_FOUND:
212 return -ENOENT;
213 case IPA_RC_L2_VLAN_ID_NOT_ALLOWED:
214 return -EPERM;
215 default:
216 return -EIO;
217 }
218}
219
220static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
221 struct qeth_reply *reply,
222 unsigned long data)
223{
224 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
225
226 QETH_CARD_TEXT(card, 2, "L2sdvcb");
227 if (cmd->hdr.return_code) {
228 QETH_DBF_MESSAGE(2, "Error in processing VLAN %u on device %x: %#x.\n",
229 cmd->data.setdelvlan.vlan_id,
230 CARD_DEVID(card), cmd->hdr.return_code);
231 QETH_CARD_TEXT_(card, 2, "L2VL%4x", cmd->hdr.command);
232 }
233 return qeth_l2_setdelvlan_makerc(card, cmd->hdr.return_code);
234}
235
236static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
237 enum qeth_ipa_cmds ipacmd)
238{
239 struct qeth_ipa_cmd *cmd;
240 struct qeth_cmd_buffer *iob;
241
242 QETH_CARD_TEXT_(card, 4, "L2sdv%x", ipacmd);
243 iob = qeth_ipa_alloc_cmd(card, ipacmd, QETH_PROT_IPV4,
244 IPA_DATA_SIZEOF(setdelvlan));
245 if (!iob)
246 return -ENOMEM;
247 cmd = __ipa_cmd(iob);
248 cmd->data.setdelvlan.vlan_id = i;
249 return qeth_send_ipa_cmd(card, iob, qeth_l2_send_setdelvlan_cb, NULL);
250}
251
252static int qeth_l2_vlan_rx_add_vid(struct net_device *dev,
253 __be16 proto, u16 vid)
254{
255 struct qeth_card *card = dev->ml_priv;
256
257 QETH_CARD_TEXT_(card, 4, "aid:%d", vid);
258 if (!vid)
259 return 0;
260
261 return qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
262}
263
264static int qeth_l2_vlan_rx_kill_vid(struct net_device *dev,
265 __be16 proto, u16 vid)
266{
267 struct qeth_card *card = dev->ml_priv;
268
269 QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
270 if (!vid)
271 return 0;
272
273 return qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
274}
275
276static void qeth_l2_stop_card(struct qeth_card *card)
277{
278 QETH_CARD_TEXT(card, 2, "stopcard");
279
280 qeth_set_allowed_threads(card, 0, 1);
281
282 cancel_work_sync(&card->rx_mode_work);
283 qeth_l2_drain_rx_mode_cache(card);
284
285 if (card->state == CARD_STATE_SOFTSETUP) {
286 qeth_clear_ipacmd_list(card);
287 card->state = CARD_STATE_DOWN;
288 }
289
290 qeth_qdio_clear_card(card, 0);
291 qeth_drain_output_queues(card);
292 qeth_clear_working_pool_list(card);
293 flush_workqueue(card->event_wq);
294 qeth_flush_local_addrs(card);
295 card->info.promisc_mode = 0;
296}
297
298static int qeth_l2_request_initial_mac(struct qeth_card *card)
299{
300 int rc = 0;
301
302 QETH_CARD_TEXT(card, 2, "l2reqmac");
303
304 if (MACHINE_IS_VM) {
305 rc = qeth_vm_request_mac(card);
306 if (!rc)
307 goto out;
308 QETH_DBF_MESSAGE(2, "z/VM MAC Service failed on device %x: %#x\n",
309 CARD_DEVID(card), rc);
310 QETH_CARD_TEXT_(card, 2, "err%04x", rc);
311 /* fall back to alternative mechanism: */
312 }
313
314 if (!IS_OSN(card)) {
315 rc = qeth_setadpparms_change_macaddr(card);
316 if (!rc)
317 goto out;
318 QETH_DBF_MESSAGE(2, "READ_MAC Assist failed on device %x: %#x\n",
319 CARD_DEVID(card), rc);
320 QETH_CARD_TEXT_(card, 2, "1err%04x", rc);
321 /* fall back once more: */
322 }
323
324 /* some devices don't support a custom MAC address: */
325 if (IS_OSM(card) || IS_OSX(card))
326 return (rc) ? rc : -EADDRNOTAVAIL;
327 eth_hw_addr_random(card->dev);
328
329out:
330 QETH_CARD_HEX(card, 2, card->dev->dev_addr, card->dev->addr_len);
331 return 0;
332}
333
334static void qeth_l2_register_dev_addr(struct qeth_card *card)
335{
336 if (!is_valid_ether_addr(card->dev->dev_addr))
337 qeth_l2_request_initial_mac(card);
338
339 if (!IS_OSN(card) && !qeth_l2_send_setmac(card, card->dev->dev_addr))
340 card->info.dev_addr_is_registered = 1;
341 else
342 card->info.dev_addr_is_registered = 0;
343}
344
345static int qeth_l2_validate_addr(struct net_device *dev)
346{
347 struct qeth_card *card = dev->ml_priv;
348
349 if (card->info.dev_addr_is_registered)
350 return eth_validate_addr(dev);
351
352 QETH_CARD_TEXT(card, 4, "nomacadr");
353 return -EPERM;
354}
355
356static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
357{
358 struct sockaddr *addr = p;
359 struct qeth_card *card = dev->ml_priv;
360 u8 old_addr[ETH_ALEN];
361 int rc = 0;
362
363 QETH_CARD_TEXT(card, 3, "setmac");
364
365 if (IS_OSM(card) || IS_OSX(card)) {
366 QETH_CARD_TEXT(card, 3, "setmcTYP");
367 return -EOPNOTSUPP;
368 }
369 QETH_CARD_HEX(card, 3, addr->sa_data, ETH_ALEN);
370 if (!is_valid_ether_addr(addr->sa_data))
371 return -EADDRNOTAVAIL;
372
373 /* don't register the same address twice */
374 if (ether_addr_equal_64bits(dev->dev_addr, addr->sa_data) &&
375 card->info.dev_addr_is_registered)
376 return 0;
377
378 /* add the new address, switch over, drop the old */
379 rc = qeth_l2_send_setmac(card, addr->sa_data);
380 if (rc)
381 return rc;
382 ether_addr_copy(old_addr, dev->dev_addr);
383 ether_addr_copy(dev->dev_addr, addr->sa_data);
384
385 if (card->info.dev_addr_is_registered)
386 qeth_l2_remove_mac(card, old_addr);
387 card->info.dev_addr_is_registered = 1;
388 return 0;
389}
390
391static void qeth_l2_promisc_to_bridge(struct qeth_card *card, bool enable)
392{
393 int role;
394 int rc;
395
396 QETH_CARD_TEXT(card, 3, "pmisc2br");
397
398 if (enable) {
399 if (card->options.sbp.reflect_promisc_primary)
400 role = QETH_SBP_ROLE_PRIMARY;
401 else
402 role = QETH_SBP_ROLE_SECONDARY;
403 } else
404 role = QETH_SBP_ROLE_NONE;
405
406 rc = qeth_bridgeport_setrole(card, role);
407 QETH_CARD_TEXT_(card, 2, "bpm%c%04x", enable ? '+' : '-', rc);
408 if (!rc) {
409 card->options.sbp.role = role;
410 card->info.promisc_mode = enable;
411 }
412}
413
414static void qeth_l2_set_promisc_mode(struct qeth_card *card)
415{
416 bool enable = card->dev->flags & IFF_PROMISC;
417
418 if (card->info.promisc_mode == enable)
419 return;
420
421 if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE)) {
422 qeth_setadp_promisc_mode(card, enable);
423 } else {
424 mutex_lock(&card->sbp_lock);
425 if (card->options.sbp.reflect_promisc)
426 qeth_l2_promisc_to_bridge(card, enable);
427 mutex_unlock(&card->sbp_lock);
428 }
429}
430
431/* New MAC address is added to the hash table and marked to be written on card
432 * only if there is not in the hash table storage already
433 *
434*/
435static void qeth_l2_add_mac(struct qeth_card *card, struct netdev_hw_addr *ha)
436{
437 u32 mac_hash = get_unaligned((u32 *)(&ha->addr[2]));
438 struct qeth_mac *mac;
439
440 hash_for_each_possible(card->rx_mode_addrs, mac, hnode, mac_hash) {
441 if (ether_addr_equal_64bits(ha->addr, mac->mac_addr)) {
442 mac->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
443 return;
444 }
445 }
446
447 mac = kzalloc(sizeof(struct qeth_mac), GFP_ATOMIC);
448 if (!mac)
449 return;
450
451 ether_addr_copy(mac->mac_addr, ha->addr);
452 mac->disp_flag = QETH_DISP_ADDR_ADD;
453
454 hash_add(card->rx_mode_addrs, &mac->hnode, mac_hash);
455}
456
457static void qeth_l2_rx_mode_work(struct work_struct *work)
458{
459 struct qeth_card *card = container_of(work, struct qeth_card,
460 rx_mode_work);
461 struct net_device *dev = card->dev;
462 struct netdev_hw_addr *ha;
463 struct qeth_mac *mac;
464 struct hlist_node *tmp;
465 int i;
466 int rc;
467
468 QETH_CARD_TEXT(card, 3, "setmulti");
469
470 netif_addr_lock_bh(dev);
471 netdev_for_each_mc_addr(ha, dev)
472 qeth_l2_add_mac(card, ha);
473 netdev_for_each_uc_addr(ha, dev)
474 qeth_l2_add_mac(card, ha);
475 netif_addr_unlock_bh(dev);
476
477 hash_for_each_safe(card->rx_mode_addrs, i, tmp, mac, hnode) {
478 switch (mac->disp_flag) {
479 case QETH_DISP_ADDR_DELETE:
480 qeth_l2_remove_mac(card, mac->mac_addr);
481 hash_del(&mac->hnode);
482 kfree(mac);
483 break;
484 case QETH_DISP_ADDR_ADD:
485 rc = qeth_l2_write_mac(card, mac->mac_addr);
486 if (rc) {
487 hash_del(&mac->hnode);
488 kfree(mac);
489 break;
490 }
491 fallthrough;
492 default:
493 /* for next call to set_rx_mode(): */
494 mac->disp_flag = QETH_DISP_ADDR_DELETE;
495 }
496 }
497
498 qeth_l2_set_promisc_mode(card);
499}
500
501static int qeth_l2_xmit_osn(struct qeth_card *card, struct sk_buff *skb,
502 struct qeth_qdio_out_q *queue)
503{
504 gfp_t gfp = GFP_ATOMIC | (skb_pfmemalloc(skb) ? __GFP_MEMALLOC : 0);
505 struct qeth_hdr *hdr = (struct qeth_hdr *)skb->data;
506 addr_t end = (addr_t)(skb->data + sizeof(*hdr));
507 addr_t start = (addr_t)skb->data;
508 unsigned int elements = 0;
509 unsigned int hd_len = 0;
510 int rc;
511
512 if (skb->protocol == htons(ETH_P_IPV6))
513 return -EPROTONOSUPPORT;
514
515 if (qeth_get_elements_for_range(start, end) > 1) {
516 /* Misaligned HW header, move it to its own buffer element. */
517 hdr = kmem_cache_alloc(qeth_core_header_cache, gfp);
518 if (!hdr)
519 return -ENOMEM;
520 hd_len = sizeof(*hdr);
521 skb_copy_from_linear_data(skb, (char *)hdr, hd_len);
522 elements++;
523 }
524
525 elements += qeth_count_elements(skb, hd_len);
526 if (elements > queue->max_elements) {
527 rc = -E2BIG;
528 goto out;
529 }
530
531 rc = qeth_do_send_packet(card, queue, skb, hdr, hd_len, hd_len,
532 elements);
533out:
534 if (rc && hd_len)
535 kmem_cache_free(qeth_core_header_cache, hdr);
536 return rc;
537}
538
539static netdev_tx_t qeth_l2_hard_start_xmit(struct sk_buff *skb,
540 struct net_device *dev)
541{
542 struct qeth_card *card = dev->ml_priv;
543 u16 txq = skb_get_queue_mapping(skb);
544 struct qeth_qdio_out_q *queue;
545 int rc;
546
547 if (!skb_is_gso(skb))
548 qdisc_skb_cb(skb)->pkt_len = skb->len;
549 if (IS_IQD(card))
550 txq = qeth_iqd_translate_txq(dev, txq);
551 queue = card->qdio.out_qs[txq];
552
553 if (IS_OSN(card))
554 rc = qeth_l2_xmit_osn(card, skb, queue);
555 else
556 rc = qeth_xmit(card, skb, queue, qeth_get_ip_version(skb),
557 qeth_l2_fill_header);
558
559 if (!rc)
560 return NETDEV_TX_OK;
561
562 QETH_TXQ_STAT_INC(queue, tx_dropped);
563 kfree_skb(skb);
564 return NETDEV_TX_OK;
565}
566
567static u16 qeth_l2_select_queue(struct net_device *dev, struct sk_buff *skb,
568 struct net_device *sb_dev)
569{
570 struct qeth_card *card = dev->ml_priv;
571
572 if (IS_IQD(card))
573 return qeth_iqd_select_queue(dev, skb,
574 qeth_get_ether_cast_type(skb),
575 sb_dev);
576
577 return IS_VM_NIC(card) ? netdev_pick_tx(dev, skb, sb_dev) :
578 qeth_get_priority_queue(card, skb);
579}
580
581static const struct device_type qeth_l2_devtype = {
582 .name = "qeth_layer2",
583 .groups = qeth_l2_attr_groups,
584};
585
586static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
587{
588 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
589 int rc;
590
591 if (IS_OSN(card))
592 dev_notice(&gdev->dev, "OSN support will be dropped in 2021\n");
593
594 qeth_l2_vnicc_set_defaults(card);
595 mutex_init(&card->sbp_lock);
596
597 if (gdev->dev.type == &qeth_generic_devtype) {
598 rc = qeth_l2_create_device_attributes(&gdev->dev);
599 if (rc)
600 return rc;
601 }
602
603 INIT_WORK(&card->rx_mode_work, qeth_l2_rx_mode_work);
604 return 0;
605}
606
607static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
608{
609 struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
610
611 if (cgdev->dev.type == &qeth_generic_devtype)
612 qeth_l2_remove_device_attributes(&cgdev->dev);
613 qeth_set_allowed_threads(card, 0, 1);
614 wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
615
616 if (cgdev->state == CCWGROUP_ONLINE)
617 qeth_set_offline(card, false);
618
619 cancel_work_sync(&card->close_dev_work);
620 if (card->dev->reg_state == NETREG_REGISTERED)
621 unregister_netdev(card->dev);
622}
623
624static void qeth_l2_set_rx_mode(struct net_device *dev)
625{
626 struct qeth_card *card = dev->ml_priv;
627
628 schedule_work(&card->rx_mode_work);
629}
630
631/**
632 * qeth_l2_pnso() - perform network subchannel operation
633 * @card: qeth_card structure pointer
634 * @cnc: Boolean Change-Notification Control
635 * @cb: Callback function will be executed for each element
636 * of the address list
637 * @priv: Pointer to pass to the callback function.
638 *
639 * Collects network information in a network address list and calls the
640 * callback function for every entry in the list. If "change-notification-
641 * control" is set, further changes in the address list will be reported
642 * via the IPA command.
643 */
644static int qeth_l2_pnso(struct qeth_card *card, int cnc,
645 void (*cb)(void *priv, struct chsc_pnso_naid_l2 *entry),
646 void *priv)
647{
648 struct ccw_device *ddev = CARD_DDEV(card);
649 struct chsc_pnso_area *rr;
650 u32 prev_instance = 0;
651 int isfirstblock = 1;
652 int i, size, elems;
653 int rc;
654
655 QETH_CARD_TEXT(card, 2, "PNSO");
656 rr = (struct chsc_pnso_area *)get_zeroed_page(GFP_KERNEL);
657 if (rr == NULL)
658 return -ENOMEM;
659 do {
660 /* on the first iteration, naihdr.resume_token will be zero */
661 rc = ccw_device_pnso(ddev, rr, rr->naihdr.resume_token, cnc);
662 if (rc)
663 continue;
664 if (cb == NULL)
665 continue;
666
667 size = rr->naihdr.naids;
668 if (size != sizeof(struct chsc_pnso_naid_l2)) {
669 WARN_ON_ONCE(1);
670 continue;
671 }
672
673 elems = (rr->response.length - sizeof(struct chsc_header) -
674 sizeof(struct chsc_pnso_naihdr)) / size;
675
676 if (!isfirstblock && (rr->naihdr.instance != prev_instance)) {
677 /* Inform the caller that they need to scrap */
678 /* the data that was already reported via cb */
679 rc = -EAGAIN;
680 break;
681 }
682 isfirstblock = 0;
683 prev_instance = rr->naihdr.instance;
684 for (i = 0; i < elems; i++)
685 (*cb)(priv, &rr->entries[i]);
686 } while ((rc == -EBUSY) || (!rc && /* list stored */
687 /* resume token is non-zero => list incomplete */
688 (rr->naihdr.resume_token.t1 || rr->naihdr.resume_token.t2)));
689
690 if (rc)
691 QETH_CARD_TEXT_(card, 2, "PNrp%04x", rr->response.code);
692
693 free_page((unsigned long)rr);
694 return rc;
695}
696
697static const struct net_device_ops qeth_l2_netdev_ops = {
698 .ndo_open = qeth_open,
699 .ndo_stop = qeth_stop,
700 .ndo_get_stats64 = qeth_get_stats64,
701 .ndo_start_xmit = qeth_l2_hard_start_xmit,
702 .ndo_features_check = qeth_features_check,
703 .ndo_select_queue = qeth_l2_select_queue,
704 .ndo_validate_addr = qeth_l2_validate_addr,
705 .ndo_set_rx_mode = qeth_l2_set_rx_mode,
706 .ndo_do_ioctl = qeth_do_ioctl,
707 .ndo_set_mac_address = qeth_l2_set_mac_address,
708 .ndo_vlan_rx_add_vid = qeth_l2_vlan_rx_add_vid,
709 .ndo_vlan_rx_kill_vid = qeth_l2_vlan_rx_kill_vid,
710 .ndo_tx_timeout = qeth_tx_timeout,
711 .ndo_fix_features = qeth_fix_features,
712 .ndo_set_features = qeth_set_features
713};
714
715static const struct net_device_ops qeth_osn_netdev_ops = {
716 .ndo_open = qeth_open,
717 .ndo_stop = qeth_stop,
718 .ndo_get_stats64 = qeth_get_stats64,
719 .ndo_start_xmit = qeth_l2_hard_start_xmit,
720 .ndo_validate_addr = eth_validate_addr,
721 .ndo_tx_timeout = qeth_tx_timeout,
722};
723
724static int qeth_l2_setup_netdev(struct qeth_card *card)
725{
726 int rc;
727
728 if (IS_OSN(card)) {
729 card->dev->netdev_ops = &qeth_osn_netdev_ops;
730 card->dev->flags |= IFF_NOARP;
731 goto add_napi;
732 }
733
734 rc = qeth_setup_netdev(card);
735 if (rc)
736 return rc;
737
738 card->dev->needed_headroom = sizeof(struct qeth_hdr);
739 card->dev->netdev_ops = &qeth_l2_netdev_ops;
740 card->dev->priv_flags |= IFF_UNICAST_FLT;
741
742 if (IS_OSM(card)) {
743 card->dev->features |= NETIF_F_VLAN_CHALLENGED;
744 } else {
745 if (!IS_VM_NIC(card))
746 card->dev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
747 card->dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
748 }
749
750 if (IS_OSD(card) && !IS_VM_NIC(card)) {
751 card->dev->features |= NETIF_F_SG;
752 /* OSA 3S and earlier has no RX/TX support */
753 if (qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM)) {
754 card->dev->hw_features |= NETIF_F_IP_CSUM;
755 card->dev->vlan_features |= NETIF_F_IP_CSUM;
756 }
757 }
758 if (qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) {
759 card->dev->hw_features |= NETIF_F_IPV6_CSUM;
760 card->dev->vlan_features |= NETIF_F_IPV6_CSUM;
761 }
762 if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM) ||
763 qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6)) {
764 card->dev->hw_features |= NETIF_F_RXCSUM;
765 card->dev->vlan_features |= NETIF_F_RXCSUM;
766 }
767 if (qeth_is_supported(card, IPA_OUTBOUND_TSO)) {
768 card->dev->hw_features |= NETIF_F_TSO;
769 card->dev->vlan_features |= NETIF_F_TSO;
770 }
771 if (qeth_is_supported6(card, IPA_OUTBOUND_TSO)) {
772 card->dev->hw_features |= NETIF_F_TSO6;
773 card->dev->vlan_features |= NETIF_F_TSO6;
774 }
775
776 if (card->dev->hw_features & (NETIF_F_TSO | NETIF_F_TSO6)) {
777 card->dev->needed_headroom = sizeof(struct qeth_hdr_tso);
778 netif_keep_dst(card->dev);
779 netif_set_gso_max_size(card->dev,
780 PAGE_SIZE * (QDIO_MAX_ELEMENTS_PER_BUFFER - 1));
781 }
782
783add_napi:
784 netif_napi_add(card->dev, &card->napi, qeth_poll, QETH_NAPI_WEIGHT);
785 return register_netdev(card->dev);
786}
787
788static void qeth_l2_trace_features(struct qeth_card *card)
789{
790 /* Set BridgePort features */
791 QETH_CARD_TEXT(card, 2, "featuSBP");
792 QETH_CARD_HEX(card, 2, &card->options.sbp.supported_funcs,
793 sizeof(card->options.sbp.supported_funcs));
794 /* VNIC Characteristics features */
795 QETH_CARD_TEXT(card, 2, "feaVNICC");
796 QETH_CARD_HEX(card, 2, &card->options.vnicc.sup_chars,
797 sizeof(card->options.vnicc.sup_chars));
798}
799
800static void qeth_l2_setup_bridgeport_attrs(struct qeth_card *card)
801{
802 if (!card->options.sbp.reflect_promisc &&
803 card->options.sbp.role != QETH_SBP_ROLE_NONE) {
804 /* Conditional to avoid spurious error messages */
805 qeth_bridgeport_setrole(card, card->options.sbp.role);
806 /* Let the callback function refresh the stored role value. */
807 qeth_bridgeport_query_ports(card, &card->options.sbp.role,
808 NULL);
809 }
810 if (card->options.sbp.hostnotification) {
811 if (qeth_bridgeport_an_set(card, 1))
812 card->options.sbp.hostnotification = 0;
813 } else {
814 qeth_bridgeport_an_set(card, 0);
815 }
816}
817
818static int qeth_l2_set_online(struct qeth_card *card)
819{
820 struct ccwgroup_device *gdev = card->gdev;
821 struct net_device *dev = card->dev;
822 int rc = 0;
823 bool carrier_ok;
824
825 rc = qeth_core_hardsetup_card(card, &carrier_ok);
826 if (rc) {
827 QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
828 rc = -ENODEV;
829 goto out_remove;
830 }
831
832 mutex_lock(&card->sbp_lock);
833 qeth_bridgeport_query_support(card);
834 if (card->options.sbp.supported_funcs) {
835 qeth_l2_setup_bridgeport_attrs(card);
836 dev_info(&card->gdev->dev,
837 "The device represents a Bridge Capable Port\n");
838 }
839 mutex_unlock(&card->sbp_lock);
840
841 qeth_l2_register_dev_addr(card);
842
843 /* for the rx_bcast characteristic, init VNICC after setmac */
844 qeth_l2_vnicc_init(card);
845
846 qeth_trace_features(card);
847 qeth_l2_trace_features(card);
848
849 qeth_print_status_message(card);
850
851 /* softsetup */
852 QETH_CARD_TEXT(card, 2, "softsetp");
853
854 card->state = CARD_STATE_SOFTSETUP;
855
856 qeth_set_allowed_threads(card, 0xffffffff, 0);
857
858 if (dev->reg_state != NETREG_REGISTERED) {
859 rc = qeth_l2_setup_netdev(card);
860 if (rc)
861 goto out_remove;
862
863 if (carrier_ok)
864 netif_carrier_on(dev);
865 } else {
866 rtnl_lock();
867 if (carrier_ok)
868 netif_carrier_on(dev);
869 else
870 netif_carrier_off(dev);
871
872 netif_device_attach(dev);
873 qeth_enable_hw_features(dev);
874
875 if (card->info.open_when_online) {
876 card->info.open_when_online = 0;
877 dev_open(dev, NULL);
878 }
879 rtnl_unlock();
880 }
881 /* let user_space know that device is online */
882 kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
883 return 0;
884
885out_remove:
886 qeth_l2_stop_card(card);
887 qeth_stop_channel(&card->data);
888 qeth_stop_channel(&card->write);
889 qeth_stop_channel(&card->read);
890 qdio_free(CARD_DDEV(card));
891 return rc;
892}
893
894static void qeth_l2_set_offline(struct qeth_card *card)
895{
896 qeth_l2_stop_card(card);
897}
898
899static int __init qeth_l2_init(void)
900{
901 pr_info("register layer 2 discipline\n");
902 return 0;
903}
904
905static void __exit qeth_l2_exit(void)
906{
907 pr_info("unregister layer 2 discipline\n");
908}
909
910/* Returns zero if the command is successfully "consumed" */
911static int qeth_l2_control_event(struct qeth_card *card,
912 struct qeth_ipa_cmd *cmd)
913{
914 switch (cmd->hdr.command) {
915 case IPA_CMD_SETBRIDGEPORT_OSA:
916 case IPA_CMD_SETBRIDGEPORT_IQD:
917 if (cmd->data.sbp.hdr.command_code ==
918 IPA_SBP_BRIDGE_PORT_STATE_CHANGE) {
919 qeth_bridge_state_change(card, cmd);
920 return 0;
921 } else
922 return 1;
923 case IPA_CMD_ADDRESS_CHANGE_NOTIF:
924 qeth_addr_change_event(card, cmd);
925 return 0;
926 default:
927 return 1;
928 }
929}
930
931struct qeth_discipline qeth_l2_discipline = {
932 .devtype = &qeth_l2_devtype,
933 .setup = qeth_l2_probe_device,
934 .remove = qeth_l2_remove_device,
935 .set_online = qeth_l2_set_online,
936 .set_offline = qeth_l2_set_offline,
937 .do_ioctl = NULL,
938 .control_event_handler = qeth_l2_control_event,
939};
940EXPORT_SYMBOL_GPL(qeth_l2_discipline);
941
942#ifdef CONFIG_QETH_OSN
943static void qeth_osn_assist_cb(struct qeth_card *card,
944 struct qeth_cmd_buffer *iob,
945 unsigned int data_length)
946{
947 qeth_notify_cmd(iob, 0);
948 qeth_put_cmd(iob);
949}
950
951int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
952{
953 struct qeth_cmd_buffer *iob;
954 struct qeth_card *card;
955
956 if (data_len < 0)
957 return -EINVAL;
958 if (!dev)
959 return -ENODEV;
960 card = dev->ml_priv;
961 if (!card)
962 return -ENODEV;
963 QETH_CARD_TEXT(card, 2, "osnsdmc");
964 if (!qeth_card_hw_is_reachable(card))
965 return -ENODEV;
966
967 iob = qeth_alloc_cmd(&card->write, IPA_PDU_HEADER_SIZE + data_len, 1,
968 QETH_IPA_TIMEOUT);
969 if (!iob)
970 return -ENOMEM;
971
972 qeth_prepare_ipa_cmd(card, iob, (u16) data_len, NULL);
973
974 memcpy(__ipa_cmd(iob), data, data_len);
975 iob->callback = qeth_osn_assist_cb;
976 return qeth_send_ipa_cmd(card, iob, NULL, NULL);
977}
978EXPORT_SYMBOL(qeth_osn_assist);
979
980int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
981 int (*assist_cb)(struct net_device *, void *),
982 int (*data_cb)(struct sk_buff *))
983{
984 struct qeth_card *card;
985 char bus_id[16];
986 u16 devno;
987
988 memcpy(&devno, read_dev_no, 2);
989 sprintf(bus_id, "0.0.%04x", devno);
990 card = qeth_get_card_by_busid(bus_id);
991 if (!card || !IS_OSN(card))
992 return -ENODEV;
993 *dev = card->dev;
994
995 QETH_CARD_TEXT(card, 2, "osnreg");
996 if ((assist_cb == NULL) || (data_cb == NULL))
997 return -EINVAL;
998 card->osn_info.assist_cb = assist_cb;
999 card->osn_info.data_cb = data_cb;
1000 return 0;
1001}
1002EXPORT_SYMBOL(qeth_osn_register);
1003
1004void qeth_osn_deregister(struct net_device *dev)
1005{
1006 struct qeth_card *card;
1007
1008 if (!dev)
1009 return;
1010 card = dev->ml_priv;
1011 if (!card)
1012 return;
1013 QETH_CARD_TEXT(card, 2, "osndereg");
1014 card->osn_info.assist_cb = NULL;
1015 card->osn_info.data_cb = NULL;
1016 return;
1017}
1018EXPORT_SYMBOL(qeth_osn_deregister);
1019#endif
1020
1021/* SETBRIDGEPORT support, async notifications */
1022
1023enum qeth_an_event_type {anev_reg_unreg, anev_abort, anev_reset};
1024
1025/**
1026 * qeth_bridge_emit_host_event() - bridgeport address change notification
1027 * @card: qeth_card structure pointer, for udev events.
1028 * @evtype: "normal" register/unregister, or abort, or reset. For abort
1029 * and reset token and addr_lnid are unused and may be NULL.
1030 * @code: event bitmask: high order bit 0x80 value 1 means removal of an
1031 * object, 0 - addition of an object.
1032 * 0x01 - VLAN, 0x02 - MAC, 0x03 - VLAN and MAC.
1033 * @token: "network token" structure identifying physical address of the port.
1034 * @addr_lnid: pointer to structure with MAC address and VLAN ID.
1035 *
1036 * This function is called when registrations and deregistrations are
1037 * reported by the hardware, and also when notifications are enabled -
1038 * for all currently registered addresses.
1039 */
1040static void qeth_bridge_emit_host_event(struct qeth_card *card,
1041 enum qeth_an_event_type evtype,
1042 u8 code,
1043 struct net_if_token *token,
1044 struct mac_addr_lnid *addr_lnid)
1045{
1046 char str[7][32];
1047 char *env[8];
1048 int i = 0;
1049
1050 switch (evtype) {
1051 case anev_reg_unreg:
1052 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=%s",
1053 (code & IPA_ADDR_CHANGE_CODE_REMOVAL)
1054 ? "deregister" : "register");
1055 env[i] = str[i]; i++;
1056 if (code & IPA_ADDR_CHANGE_CODE_VLANID) {
1057 snprintf(str[i], sizeof(str[i]), "VLAN=%d",
1058 addr_lnid->lnid);
1059 env[i] = str[i]; i++;
1060 }
1061 if (code & IPA_ADDR_CHANGE_CODE_MACADDR) {
1062 snprintf(str[i], sizeof(str[i]), "MAC=%pM",
1063 addr_lnid->mac);
1064 env[i] = str[i]; i++;
1065 }
1066 snprintf(str[i], sizeof(str[i]), "NTOK_BUSID=%x.%x.%04x",
1067 token->cssid, token->ssid, token->devnum);
1068 env[i] = str[i]; i++;
1069 snprintf(str[i], sizeof(str[i]), "NTOK_IID=%02x", token->iid);
1070 env[i] = str[i]; i++;
1071 snprintf(str[i], sizeof(str[i]), "NTOK_CHPID=%02x",
1072 token->chpid);
1073 env[i] = str[i]; i++;
1074 snprintf(str[i], sizeof(str[i]), "NTOK_CHID=%04x", token->chid);
1075 env[i] = str[i]; i++;
1076 break;
1077 case anev_abort:
1078 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=abort");
1079 env[i] = str[i]; i++;
1080 break;
1081 case anev_reset:
1082 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=reset");
1083 env[i] = str[i]; i++;
1084 break;
1085 }
1086 env[i] = NULL;
1087 kobject_uevent_env(&card->gdev->dev.kobj, KOBJ_CHANGE, env);
1088}
1089
1090struct qeth_bridge_state_data {
1091 struct work_struct worker;
1092 struct qeth_card *card;
1093 struct qeth_sbp_state_change qports;
1094};
1095
1096static void qeth_bridge_state_change_worker(struct work_struct *work)
1097{
1098 struct qeth_bridge_state_data *data =
1099 container_of(work, struct qeth_bridge_state_data, worker);
1100 /* We are only interested in the first entry - local port */
1101 struct qeth_sbp_port_entry *entry = &data->qports.entry[0];
1102 char env_locrem[32];
1103 char env_role[32];
1104 char env_state[32];
1105 char *env[] = {
1106 env_locrem,
1107 env_role,
1108 env_state,
1109 NULL
1110 };
1111
1112 /* Role should not change by itself, but if it did, */
1113 /* information from the hardware is authoritative. */
1114 mutex_lock(&data->card->sbp_lock);
1115 data->card->options.sbp.role = entry->role;
1116 mutex_unlock(&data->card->sbp_lock);
1117
1118 snprintf(env_locrem, sizeof(env_locrem), "BRIDGEPORT=statechange");
1119 snprintf(env_role, sizeof(env_role), "ROLE=%s",
1120 (entry->role == QETH_SBP_ROLE_NONE) ? "none" :
1121 (entry->role == QETH_SBP_ROLE_PRIMARY) ? "primary" :
1122 (entry->role == QETH_SBP_ROLE_SECONDARY) ? "secondary" :
1123 "<INVALID>");
1124 snprintf(env_state, sizeof(env_state), "STATE=%s",
1125 (entry->state == QETH_SBP_STATE_INACTIVE) ? "inactive" :
1126 (entry->state == QETH_SBP_STATE_STANDBY) ? "standby" :
1127 (entry->state == QETH_SBP_STATE_ACTIVE) ? "active" :
1128 "<INVALID>");
1129 kobject_uevent_env(&data->card->gdev->dev.kobj,
1130 KOBJ_CHANGE, env);
1131 kfree(data);
1132}
1133
1134static void qeth_bridge_state_change(struct qeth_card *card,
1135 struct qeth_ipa_cmd *cmd)
1136{
1137 struct qeth_sbp_state_change *qports =
1138 &cmd->data.sbp.data.state_change;
1139 struct qeth_bridge_state_data *data;
1140 int extrasize;
1141
1142 QETH_CARD_TEXT(card, 2, "brstchng");
1143 if (qports->num_entries == 0) {
1144 QETH_CARD_TEXT(card, 2, "BPempty");
1145 return;
1146 }
1147 if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1148 QETH_CARD_TEXT_(card, 2, "BPsz%04x", qports->entry_length);
1149 return;
1150 }
1151 extrasize = sizeof(struct qeth_sbp_port_entry) * qports->num_entries;
1152 data = kzalloc(sizeof(struct qeth_bridge_state_data) + extrasize,
1153 GFP_ATOMIC);
1154 if (!data) {
1155 QETH_CARD_TEXT(card, 2, "BPSalloc");
1156 return;
1157 }
1158 INIT_WORK(&data->worker, qeth_bridge_state_change_worker);
1159 data->card = card;
1160 memcpy(&data->qports, qports,
1161 sizeof(struct qeth_sbp_state_change) + extrasize);
1162 queue_work(card->event_wq, &data->worker);
1163}
1164
1165struct qeth_addr_change_data {
1166 struct work_struct worker;
1167 struct qeth_card *card;
1168 struct qeth_ipacmd_addr_change ac_event;
1169};
1170
1171static void qeth_addr_change_event_worker(struct work_struct *work)
1172{
1173 struct qeth_addr_change_data *data =
1174 container_of(work, struct qeth_addr_change_data, worker);
1175 int i;
1176
1177 QETH_CARD_TEXT(data->card, 4, "adrchgew");
1178 if (data->ac_event.lost_event_mask) {
1179 dev_info(&data->card->gdev->dev,
1180 "Address change notification stopped on %s (%s)\n",
1181 data->card->dev->name,
1182 (data->ac_event.lost_event_mask == 0x01)
1183 ? "Overflow"
1184 : (data->ac_event.lost_event_mask == 0x02)
1185 ? "Bridge port state change"
1186 : "Unknown reason");
1187 mutex_lock(&data->card->sbp_lock);
1188 data->card->options.sbp.hostnotification = 0;
1189 mutex_unlock(&data->card->sbp_lock);
1190 qeth_bridge_emit_host_event(data->card, anev_abort,
1191 0, NULL, NULL);
1192 } else
1193 for (i = 0; i < data->ac_event.num_entries; i++) {
1194 struct qeth_ipacmd_addr_change_entry *entry =
1195 &data->ac_event.entry[i];
1196 qeth_bridge_emit_host_event(data->card,
1197 anev_reg_unreg,
1198 entry->change_code,
1199 &entry->token,
1200 &entry->addr_lnid);
1201 }
1202 kfree(data);
1203}
1204
1205static void qeth_addr_change_event(struct qeth_card *card,
1206 struct qeth_ipa_cmd *cmd)
1207{
1208 struct qeth_ipacmd_addr_change *hostevs =
1209 &cmd->data.addrchange;
1210 struct qeth_addr_change_data *data;
1211 int extrasize;
1212
1213 QETH_CARD_TEXT(card, 4, "adrchgev");
1214 if (cmd->hdr.return_code != 0x0000) {
1215 if (cmd->hdr.return_code == 0x0010) {
1216 if (hostevs->lost_event_mask == 0x00)
1217 hostevs->lost_event_mask = 0xff;
1218 } else {
1219 QETH_CARD_TEXT_(card, 2, "ACHN%04x",
1220 cmd->hdr.return_code);
1221 return;
1222 }
1223 }
1224 extrasize = sizeof(struct qeth_ipacmd_addr_change_entry) *
1225 hostevs->num_entries;
1226 data = kzalloc(sizeof(struct qeth_addr_change_data) + extrasize,
1227 GFP_ATOMIC);
1228 if (!data) {
1229 QETH_CARD_TEXT(card, 2, "ACNalloc");
1230 return;
1231 }
1232 INIT_WORK(&data->worker, qeth_addr_change_event_worker);
1233 data->card = card;
1234 memcpy(&data->ac_event, hostevs,
1235 sizeof(struct qeth_ipacmd_addr_change) + extrasize);
1236 queue_work(card->event_wq, &data->worker);
1237}
1238
1239/* SETBRIDGEPORT support; sending commands */
1240
1241struct _qeth_sbp_cbctl {
1242 union {
1243 u32 supported;
1244 struct {
1245 enum qeth_sbp_roles *role;
1246 enum qeth_sbp_states *state;
1247 } qports;
1248 } data;
1249};
1250
1251static int qeth_bridgeport_makerc(struct qeth_card *card,
1252 struct qeth_ipa_cmd *cmd)
1253{
1254 struct qeth_ipacmd_setbridgeport *sbp = &cmd->data.sbp;
1255 enum qeth_ipa_sbp_cmd setcmd = sbp->hdr.command_code;
1256 u16 ipa_rc = cmd->hdr.return_code;
1257 u16 sbp_rc = sbp->hdr.return_code;
1258 int rc;
1259
1260 if (ipa_rc == IPA_RC_SUCCESS && sbp_rc == IPA_RC_SUCCESS)
1261 return 0;
1262
1263 if ((IS_IQD(card) && ipa_rc == IPA_RC_SUCCESS) ||
1264 (!IS_IQD(card) && ipa_rc == sbp_rc)) {
1265 switch (sbp_rc) {
1266 case IPA_RC_SUCCESS:
1267 rc = 0;
1268 break;
1269 case IPA_RC_L2_UNSUPPORTED_CMD:
1270 case IPA_RC_UNSUPPORTED_COMMAND:
1271 rc = -EOPNOTSUPP;
1272 break;
1273 case IPA_RC_SBP_OSA_NOT_CONFIGURED:
1274 case IPA_RC_SBP_IQD_NOT_CONFIGURED:
1275 rc = -ENODEV; /* maybe not the best code here? */
1276 dev_err(&card->gdev->dev,
1277 "The device is not configured as a Bridge Port\n");
1278 break;
1279 case IPA_RC_SBP_OSA_OS_MISMATCH:
1280 case IPA_RC_SBP_IQD_OS_MISMATCH:
1281 rc = -EPERM;
1282 dev_err(&card->gdev->dev,
1283 "A Bridge Port is already configured by a different operating system\n");
1284 break;
1285 case IPA_RC_SBP_OSA_ANO_DEV_PRIMARY:
1286 case IPA_RC_SBP_IQD_ANO_DEV_PRIMARY:
1287 switch (setcmd) {
1288 case IPA_SBP_SET_PRIMARY_BRIDGE_PORT:
1289 rc = -EEXIST;
1290 dev_err(&card->gdev->dev,
1291 "The LAN already has a primary Bridge Port\n");
1292 break;
1293 case IPA_SBP_SET_SECONDARY_BRIDGE_PORT:
1294 rc = -EBUSY;
1295 dev_err(&card->gdev->dev,
1296 "The device is already a primary Bridge Port\n");
1297 break;
1298 default:
1299 rc = -EIO;
1300 }
1301 break;
1302 case IPA_RC_SBP_OSA_CURRENT_SECOND:
1303 case IPA_RC_SBP_IQD_CURRENT_SECOND:
1304 rc = -EBUSY;
1305 dev_err(&card->gdev->dev,
1306 "The device is already a secondary Bridge Port\n");
1307 break;
1308 case IPA_RC_SBP_OSA_LIMIT_SECOND:
1309 case IPA_RC_SBP_IQD_LIMIT_SECOND:
1310 rc = -EEXIST;
1311 dev_err(&card->gdev->dev,
1312 "The LAN cannot have more secondary Bridge Ports\n");
1313 break;
1314 case IPA_RC_SBP_OSA_CURRENT_PRIMARY:
1315 case IPA_RC_SBP_IQD_CURRENT_PRIMARY:
1316 rc = -EBUSY;
1317 dev_err(&card->gdev->dev,
1318 "The device is already a primary Bridge Port\n");
1319 break;
1320 case IPA_RC_SBP_OSA_NOT_AUTHD_BY_ZMAN:
1321 case IPA_RC_SBP_IQD_NOT_AUTHD_BY_ZMAN:
1322 rc = -EACCES;
1323 dev_err(&card->gdev->dev,
1324 "The device is not authorized to be a Bridge Port\n");
1325 break;
1326 default:
1327 rc = -EIO;
1328 }
1329 } else {
1330 switch (ipa_rc) {
1331 case IPA_RC_NOTSUPP:
1332 rc = -EOPNOTSUPP;
1333 break;
1334 case IPA_RC_UNSUPPORTED_COMMAND:
1335 rc = -EOPNOTSUPP;
1336 break;
1337 default:
1338 rc = -EIO;
1339 }
1340 }
1341
1342 if (rc) {
1343 QETH_CARD_TEXT_(card, 2, "SBPi%04x", ipa_rc);
1344 QETH_CARD_TEXT_(card, 2, "SBPc%04x", sbp_rc);
1345 }
1346 return rc;
1347}
1348
1349static struct qeth_cmd_buffer *qeth_sbp_build_cmd(struct qeth_card *card,
1350 enum qeth_ipa_sbp_cmd sbp_cmd,
1351 unsigned int data_length)
1352{
1353 enum qeth_ipa_cmds ipa_cmd = IS_IQD(card) ? IPA_CMD_SETBRIDGEPORT_IQD :
1354 IPA_CMD_SETBRIDGEPORT_OSA;
1355 struct qeth_ipacmd_sbp_hdr *hdr;
1356 struct qeth_cmd_buffer *iob;
1357
1358 iob = qeth_ipa_alloc_cmd(card, ipa_cmd, QETH_PROT_NONE,
1359 data_length +
1360 offsetof(struct qeth_ipacmd_setbridgeport,
1361 data));
1362 if (!iob)
1363 return iob;
1364
1365 hdr = &__ipa_cmd(iob)->data.sbp.hdr;
1366 hdr->cmdlength = sizeof(*hdr) + data_length;
1367 hdr->command_code = sbp_cmd;
1368 hdr->used_total = 1;
1369 hdr->seq_no = 1;
1370 return iob;
1371}
1372
1373static int qeth_bridgeport_query_support_cb(struct qeth_card *card,
1374 struct qeth_reply *reply, unsigned long data)
1375{
1376 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1377 struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1378 int rc;
1379
1380 QETH_CARD_TEXT(card, 2, "brqsupcb");
1381 rc = qeth_bridgeport_makerc(card, cmd);
1382 if (rc)
1383 return rc;
1384
1385 cbctl->data.supported =
1386 cmd->data.sbp.data.query_cmds_supp.supported_cmds;
1387 return 0;
1388}
1389
1390/**
1391 * qeth_bridgeport_query_support() - store bitmask of supported subfunctions.
1392 * @card: qeth_card structure pointer.
1393 *
1394 * Sets bitmask of supported setbridgeport subfunctions in the qeth_card
1395 * strucutre: card->options.sbp.supported_funcs.
1396 */
1397static void qeth_bridgeport_query_support(struct qeth_card *card)
1398{
1399 struct qeth_cmd_buffer *iob;
1400 struct _qeth_sbp_cbctl cbctl;
1401
1402 QETH_CARD_TEXT(card, 2, "brqsuppo");
1403 iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_COMMANDS_SUPPORTED,
1404 SBP_DATA_SIZEOF(query_cmds_supp));
1405 if (!iob)
1406 return;
1407
1408 if (qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_support_cb,
1409 &cbctl)) {
1410 card->options.sbp.role = QETH_SBP_ROLE_NONE;
1411 card->options.sbp.supported_funcs = 0;
1412 return;
1413 }
1414 card->options.sbp.supported_funcs = cbctl.data.supported;
1415}
1416
1417static int qeth_bridgeport_query_ports_cb(struct qeth_card *card,
1418 struct qeth_reply *reply, unsigned long data)
1419{
1420 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1421 struct qeth_sbp_query_ports *qports = &cmd->data.sbp.data.query_ports;
1422 struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1423 int rc;
1424
1425 QETH_CARD_TEXT(card, 2, "brqprtcb");
1426 rc = qeth_bridgeport_makerc(card, cmd);
1427 if (rc)
1428 return rc;
1429
1430 if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1431 QETH_CARD_TEXT_(card, 2, "SBPs%04x", qports->entry_length);
1432 return -EINVAL;
1433 }
1434 /* first entry contains the state of the local port */
1435 if (qports->num_entries > 0) {
1436 if (cbctl->data.qports.role)
1437 *cbctl->data.qports.role = qports->entry[0].role;
1438 if (cbctl->data.qports.state)
1439 *cbctl->data.qports.state = qports->entry[0].state;
1440 }
1441 return 0;
1442}
1443
1444/**
1445 * qeth_bridgeport_query_ports() - query local bridgeport status.
1446 * @card: qeth_card structure pointer.
1447 * @role: Role of the port: 0-none, 1-primary, 2-secondary.
1448 * @state: State of the port: 0-inactive, 1-standby, 2-active.
1449 *
1450 * Returns negative errno-compatible error indication or 0 on success.
1451 *
1452 * 'role' and 'state' are not updated in case of hardware operation failure.
1453 */
1454int qeth_bridgeport_query_ports(struct qeth_card *card,
1455 enum qeth_sbp_roles *role, enum qeth_sbp_states *state)
1456{
1457 struct qeth_cmd_buffer *iob;
1458 struct _qeth_sbp_cbctl cbctl = {
1459 .data = {
1460 .qports = {
1461 .role = role,
1462 .state = state,
1463 },
1464 },
1465 };
1466
1467 QETH_CARD_TEXT(card, 2, "brqports");
1468 if (!(card->options.sbp.supported_funcs & IPA_SBP_QUERY_BRIDGE_PORTS))
1469 return -EOPNOTSUPP;
1470 iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_BRIDGE_PORTS, 0);
1471 if (!iob)
1472 return -ENOMEM;
1473
1474 return qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_ports_cb,
1475 &cbctl);
1476}
1477
1478static int qeth_bridgeport_set_cb(struct qeth_card *card,
1479 struct qeth_reply *reply, unsigned long data)
1480{
1481 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
1482
1483 QETH_CARD_TEXT(card, 2, "brsetrcb");
1484 return qeth_bridgeport_makerc(card, cmd);
1485}
1486
1487/**
1488 * qeth_bridgeport_setrole() - Assign primary role to the port.
1489 * @card: qeth_card structure pointer.
1490 * @role: Role to assign.
1491 *
1492 * Returns negative errno-compatible error indication or 0 on success.
1493 */
1494int qeth_bridgeport_setrole(struct qeth_card *card, enum qeth_sbp_roles role)
1495{
1496 struct qeth_cmd_buffer *iob;
1497 enum qeth_ipa_sbp_cmd setcmd;
1498 unsigned int cmdlength = 0;
1499
1500 QETH_CARD_TEXT(card, 2, "brsetrol");
1501 switch (role) {
1502 case QETH_SBP_ROLE_NONE:
1503 setcmd = IPA_SBP_RESET_BRIDGE_PORT_ROLE;
1504 break;
1505 case QETH_SBP_ROLE_PRIMARY:
1506 setcmd = IPA_SBP_SET_PRIMARY_BRIDGE_PORT;
1507 cmdlength = SBP_DATA_SIZEOF(set_primary);
1508 break;
1509 case QETH_SBP_ROLE_SECONDARY:
1510 setcmd = IPA_SBP_SET_SECONDARY_BRIDGE_PORT;
1511 break;
1512 default:
1513 return -EINVAL;
1514 }
1515 if (!(card->options.sbp.supported_funcs & setcmd))
1516 return -EOPNOTSUPP;
1517 iob = qeth_sbp_build_cmd(card, setcmd, cmdlength);
1518 if (!iob)
1519 return -ENOMEM;
1520
1521 return qeth_send_ipa_cmd(card, iob, qeth_bridgeport_set_cb, NULL);
1522}
1523
1524static void qeth_bridgeport_an_set_cb(void *priv,
1525 struct chsc_pnso_naid_l2 *entry)
1526{
1527 struct qeth_card *card = (struct qeth_card *)priv;
1528 u8 code;
1529
1530 code = IPA_ADDR_CHANGE_CODE_MACADDR;
1531 if (entry->addr_lnid.lnid < VLAN_N_VID)
1532 code |= IPA_ADDR_CHANGE_CODE_VLANID;
1533 qeth_bridge_emit_host_event(card, anev_reg_unreg, code,
1534 (struct net_if_token *)&entry->nit,
1535 (struct mac_addr_lnid *)&entry->addr_lnid);
1536}
1537
1538/**
1539 * qeth_bridgeport_an_set() - Enable or disable bridgeport address notification
1540 * @card: qeth_card structure pointer.
1541 * @enable: 0 - disable, non-zero - enable notifications
1542 *
1543 * Returns negative errno-compatible error indication or 0 on success.
1544 *
1545 * On enable, emits a series of address notifications udev events for all
1546 * currently registered hosts.
1547 */
1548int qeth_bridgeport_an_set(struct qeth_card *card, int enable)
1549{
1550 int rc;
1551
1552 if (!card->options.sbp.supported_funcs)
1553 return -EOPNOTSUPP;
1554
1555 if (enable) {
1556 qeth_bridge_emit_host_event(card, anev_reset, 0, NULL, NULL);
1557 rc = qeth_l2_pnso(card, 1, qeth_bridgeport_an_set_cb, card);
1558 } else
1559 rc = qeth_l2_pnso(card, 0, NULL, NULL);
1560 return rc;
1561}
1562
1563static bool qeth_bridgeport_is_in_use(struct qeth_card *card)
1564{
1565 return (card->options.sbp.role || card->options.sbp.reflect_promisc ||
1566 card->options.sbp.hostnotification);
1567}
1568
1569/* VNIC Characteristics support */
1570
1571/* handle VNICC IPA command return codes; convert to error codes */
1572static int qeth_l2_vnicc_makerc(struct qeth_card *card, u16 ipa_rc)
1573{
1574 int rc;
1575
1576 switch (ipa_rc) {
1577 case IPA_RC_SUCCESS:
1578 return ipa_rc;
1579 case IPA_RC_L2_UNSUPPORTED_CMD:
1580 case IPA_RC_NOTSUPP:
1581 rc = -EOPNOTSUPP;
1582 break;
1583 case IPA_RC_VNICC_OOSEQ:
1584 rc = -EALREADY;
1585 break;
1586 case IPA_RC_VNICC_VNICBP:
1587 rc = -EBUSY;
1588 break;
1589 case IPA_RC_L2_ADDR_TABLE_FULL:
1590 rc = -ENOSPC;
1591 break;
1592 case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
1593 rc = -EACCES;
1594 break;
1595 default:
1596 rc = -EIO;
1597 }
1598
1599 QETH_CARD_TEXT_(card, 2, "err%04x", ipa_rc);
1600 return rc;
1601}
1602
1603/* generic VNICC request call back */
1604static int qeth_l2_vnicc_request_cb(struct qeth_card *card,
1605 struct qeth_reply *reply,
1606 unsigned long data)
1607{
1608 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1609 struct qeth_ipacmd_vnicc *rep = &cmd->data.vnicc;
1610 u32 sub_cmd = cmd->data.vnicc.hdr.sub_command;
1611
1612 QETH_CARD_TEXT(card, 2, "vniccrcb");
1613 if (cmd->hdr.return_code)
1614 return qeth_l2_vnicc_makerc(card, cmd->hdr.return_code);
1615 /* return results to caller */
1616 card->options.vnicc.sup_chars = rep->vnicc_cmds.supported;
1617 card->options.vnicc.cur_chars = rep->vnicc_cmds.enabled;
1618
1619 if (sub_cmd == IPA_VNICC_QUERY_CMDS)
1620 *(u32 *)reply->param = rep->data.query_cmds.sup_cmds;
1621 else if (sub_cmd == IPA_VNICC_GET_TIMEOUT)
1622 *(u32 *)reply->param = rep->data.getset_timeout.timeout;
1623
1624 return 0;
1625}
1626
1627static struct qeth_cmd_buffer *qeth_l2_vnicc_build_cmd(struct qeth_card *card,
1628 u32 vnicc_cmd,
1629 unsigned int data_length)
1630{
1631 struct qeth_ipacmd_vnicc_hdr *hdr;
1632 struct qeth_cmd_buffer *iob;
1633
1634 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_VNICC, QETH_PROT_NONE,
1635 data_length +
1636 offsetof(struct qeth_ipacmd_vnicc, data));
1637 if (!iob)
1638 return NULL;
1639
1640 hdr = &__ipa_cmd(iob)->data.vnicc.hdr;
1641 hdr->data_length = sizeof(*hdr) + data_length;
1642 hdr->sub_command = vnicc_cmd;
1643 return iob;
1644}
1645
1646/* VNICC query VNIC characteristics request */
1647static int qeth_l2_vnicc_query_chars(struct qeth_card *card)
1648{
1649 struct qeth_cmd_buffer *iob;
1650
1651 QETH_CARD_TEXT(card, 2, "vniccqch");
1652 iob = qeth_l2_vnicc_build_cmd(card, IPA_VNICC_QUERY_CHARS, 0);
1653 if (!iob)
1654 return -ENOMEM;
1655
1656 return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, NULL);
1657}
1658
1659/* VNICC query sub commands request */
1660static int qeth_l2_vnicc_query_cmds(struct qeth_card *card, u32 vnic_char,
1661 u32 *sup_cmds)
1662{
1663 struct qeth_cmd_buffer *iob;
1664
1665 QETH_CARD_TEXT(card, 2, "vniccqcm");
1666 iob = qeth_l2_vnicc_build_cmd(card, IPA_VNICC_QUERY_CMDS,
1667 VNICC_DATA_SIZEOF(query_cmds));
1668 if (!iob)
1669 return -ENOMEM;
1670
1671 __ipa_cmd(iob)->data.vnicc.data.query_cmds.vnic_char = vnic_char;
1672
1673 return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, sup_cmds);
1674}
1675
1676/* VNICC enable/disable characteristic request */
1677static int qeth_l2_vnicc_set_char(struct qeth_card *card, u32 vnic_char,
1678 u32 cmd)
1679{
1680 struct qeth_cmd_buffer *iob;
1681
1682 QETH_CARD_TEXT(card, 2, "vniccedc");
1683 iob = qeth_l2_vnicc_build_cmd(card, cmd, VNICC_DATA_SIZEOF(set_char));
1684 if (!iob)
1685 return -ENOMEM;
1686
1687 __ipa_cmd(iob)->data.vnicc.data.set_char.vnic_char = vnic_char;
1688
1689 return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, NULL);
1690}
1691
1692/* VNICC get/set timeout for characteristic request */
1693static int qeth_l2_vnicc_getset_timeout(struct qeth_card *card, u32 vnicc,
1694 u32 cmd, u32 *timeout)
1695{
1696 struct qeth_vnicc_getset_timeout *getset_timeout;
1697 struct qeth_cmd_buffer *iob;
1698
1699 QETH_CARD_TEXT(card, 2, "vniccgst");
1700 iob = qeth_l2_vnicc_build_cmd(card, cmd,
1701 VNICC_DATA_SIZEOF(getset_timeout));
1702 if (!iob)
1703 return -ENOMEM;
1704
1705 getset_timeout = &__ipa_cmd(iob)->data.vnicc.data.getset_timeout;
1706 getset_timeout->vnic_char = vnicc;
1707
1708 if (cmd == IPA_VNICC_SET_TIMEOUT)
1709 getset_timeout->timeout = *timeout;
1710
1711 return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, timeout);
1712}
1713
1714/* set current VNICC flag state; called from sysfs store function */
1715int qeth_l2_vnicc_set_state(struct qeth_card *card, u32 vnicc, bool state)
1716{
1717 int rc = 0;
1718 u32 cmd;
1719
1720 QETH_CARD_TEXT(card, 2, "vniccsch");
1721
1722 /* check if characteristic and enable/disable are supported */
1723 if (!(card->options.vnicc.sup_chars & vnicc) ||
1724 !(card->options.vnicc.set_char_sup & vnicc))
1725 return -EOPNOTSUPP;
1726
1727 if (qeth_bridgeport_is_in_use(card))
1728 return -EBUSY;
1729
1730 /* set enable/disable command and store wanted characteristic */
1731 if (state) {
1732 cmd = IPA_VNICC_ENABLE;
1733 card->options.vnicc.wanted_chars |= vnicc;
1734 } else {
1735 cmd = IPA_VNICC_DISABLE;
1736 card->options.vnicc.wanted_chars &= ~vnicc;
1737 }
1738
1739 /* do we need to do anything? */
1740 if (card->options.vnicc.cur_chars == card->options.vnicc.wanted_chars)
1741 return rc;
1742
1743 /* if card is not ready, simply stop here */
1744 if (!qeth_card_hw_is_reachable(card)) {
1745 if (state)
1746 card->options.vnicc.cur_chars |= vnicc;
1747 else
1748 card->options.vnicc.cur_chars &= ~vnicc;
1749 return rc;
1750 }
1751
1752 rc = qeth_l2_vnicc_set_char(card, vnicc, cmd);
1753 if (rc)
1754 card->options.vnicc.wanted_chars =
1755 card->options.vnicc.cur_chars;
1756 else {
1757 /* successful online VNICC change; handle special cases */
1758 if (state && vnicc == QETH_VNICC_RX_BCAST)
1759 card->options.vnicc.rx_bcast_enabled = true;
1760 if (!state && vnicc == QETH_VNICC_LEARNING)
1761 qeth_l2_vnicc_recover_timeout(card, vnicc,
1762 &card->options.vnicc.learning_timeout);
1763 }
1764
1765 return rc;
1766}
1767
1768/* get current VNICC flag state; called from sysfs show function */
1769int qeth_l2_vnicc_get_state(struct qeth_card *card, u32 vnicc, bool *state)
1770{
1771 int rc = 0;
1772
1773 QETH_CARD_TEXT(card, 2, "vniccgch");
1774
1775 /* check if characteristic is supported */
1776 if (!(card->options.vnicc.sup_chars & vnicc))
1777 return -EOPNOTSUPP;
1778
1779 if (qeth_bridgeport_is_in_use(card))
1780 return -EBUSY;
1781
1782 /* if card is ready, query current VNICC state */
1783 if (qeth_card_hw_is_reachable(card))
1784 rc = qeth_l2_vnicc_query_chars(card);
1785
1786 *state = (card->options.vnicc.cur_chars & vnicc) ? true : false;
1787 return rc;
1788}
1789
1790/* set VNICC timeout; called from sysfs store function. Currently, only learning
1791 * supports timeout
1792 */
1793int qeth_l2_vnicc_set_timeout(struct qeth_card *card, u32 timeout)
1794{
1795 int rc = 0;
1796
1797 QETH_CARD_TEXT(card, 2, "vniccsto");
1798
1799 /* check if characteristic and set_timeout are supported */
1800 if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
1801 !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
1802 return -EOPNOTSUPP;
1803
1804 if (qeth_bridgeport_is_in_use(card))
1805 return -EBUSY;
1806
1807 /* do we need to do anything? */
1808 if (card->options.vnicc.learning_timeout == timeout)
1809 return rc;
1810
1811 /* if card is not ready, simply store the value internally and return */
1812 if (!qeth_card_hw_is_reachable(card)) {
1813 card->options.vnicc.learning_timeout = timeout;
1814 return rc;
1815 }
1816
1817 /* send timeout value to card; if successful, store value internally */
1818 rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
1819 IPA_VNICC_SET_TIMEOUT, &timeout);
1820 if (!rc)
1821 card->options.vnicc.learning_timeout = timeout;
1822
1823 return rc;
1824}
1825
1826/* get current VNICC timeout; called from sysfs show function. Currently, only
1827 * learning supports timeout
1828 */
1829int qeth_l2_vnicc_get_timeout(struct qeth_card *card, u32 *timeout)
1830{
1831 int rc = 0;
1832
1833 QETH_CARD_TEXT(card, 2, "vniccgto");
1834
1835 /* check if characteristic and get_timeout are supported */
1836 if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
1837 !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
1838 return -EOPNOTSUPP;
1839
1840 if (qeth_bridgeport_is_in_use(card))
1841 return -EBUSY;
1842
1843 /* if card is ready, get timeout. Otherwise, just return stored value */
1844 *timeout = card->options.vnicc.learning_timeout;
1845 if (qeth_card_hw_is_reachable(card))
1846 rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
1847 IPA_VNICC_GET_TIMEOUT,
1848 timeout);
1849
1850 return rc;
1851}
1852
1853/* check if VNICC is currently enabled */
1854bool qeth_l2_vnicc_is_in_use(struct qeth_card *card)
1855{
1856 if (!card->options.vnicc.sup_chars)
1857 return false;
1858 /* default values are only OK if rx_bcast was not enabled by user
1859 * or the card is offline.
1860 */
1861 if (card->options.vnicc.cur_chars == QETH_VNICC_DEFAULT) {
1862 if (!card->options.vnicc.rx_bcast_enabled ||
1863 !qeth_card_hw_is_reachable(card))
1864 return false;
1865 }
1866 return true;
1867}
1868
1869/* recover user timeout setting */
1870static bool qeth_l2_vnicc_recover_timeout(struct qeth_card *card, u32 vnicc,
1871 u32 *timeout)
1872{
1873 if (card->options.vnicc.sup_chars & vnicc &&
1874 card->options.vnicc.getset_timeout_sup & vnicc &&
1875 !qeth_l2_vnicc_getset_timeout(card, vnicc, IPA_VNICC_SET_TIMEOUT,
1876 timeout))
1877 return false;
1878 *timeout = QETH_VNICC_DEFAULT_TIMEOUT;
1879 return true;
1880}
1881
1882/* recover user characteristic setting */
1883static bool qeth_l2_vnicc_recover_char(struct qeth_card *card, u32 vnicc,
1884 bool enable)
1885{
1886 u32 cmd = enable ? IPA_VNICC_ENABLE : IPA_VNICC_DISABLE;
1887
1888 if (card->options.vnicc.sup_chars & vnicc &&
1889 card->options.vnicc.set_char_sup & vnicc &&
1890 !qeth_l2_vnicc_set_char(card, vnicc, cmd))
1891 return false;
1892 card->options.vnicc.wanted_chars &= ~vnicc;
1893 card->options.vnicc.wanted_chars |= QETH_VNICC_DEFAULT & vnicc;
1894 return true;
1895}
1896
1897/* (re-)initialize VNICC */
1898static void qeth_l2_vnicc_init(struct qeth_card *card)
1899{
1900 u32 *timeout = &card->options.vnicc.learning_timeout;
1901 bool enable, error = false;
1902 unsigned int chars_len, i;
1903 unsigned long chars_tmp;
1904 u32 sup_cmds, vnicc;
1905
1906 QETH_CARD_TEXT(card, 2, "vniccini");
1907 /* reset rx_bcast */
1908 card->options.vnicc.rx_bcast_enabled = 0;
1909 /* initial query and storage of VNIC characteristics */
1910 if (qeth_l2_vnicc_query_chars(card)) {
1911 if (card->options.vnicc.wanted_chars != QETH_VNICC_DEFAULT ||
1912 *timeout != QETH_VNICC_DEFAULT_TIMEOUT)
1913 dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
1914 /* fail quietly if user didn't change the default config */
1915 card->options.vnicc.sup_chars = 0;
1916 card->options.vnicc.cur_chars = 0;
1917 card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
1918 return;
1919 }
1920 /* get supported commands for each supported characteristic */
1921 chars_tmp = card->options.vnicc.sup_chars;
1922 chars_len = sizeof(card->options.vnicc.sup_chars) * BITS_PER_BYTE;
1923 for_each_set_bit(i, &chars_tmp, chars_len) {
1924 vnicc = BIT(i);
1925 if (qeth_l2_vnicc_query_cmds(card, vnicc, &sup_cmds)) {
1926 sup_cmds = 0;
1927 error = true;
1928 }
1929 if ((sup_cmds & IPA_VNICC_SET_TIMEOUT) &&
1930 (sup_cmds & IPA_VNICC_GET_TIMEOUT))
1931 card->options.vnicc.getset_timeout_sup |= vnicc;
1932 else
1933 card->options.vnicc.getset_timeout_sup &= ~vnicc;
1934 if ((sup_cmds & IPA_VNICC_ENABLE) &&
1935 (sup_cmds & IPA_VNICC_DISABLE))
1936 card->options.vnicc.set_char_sup |= vnicc;
1937 else
1938 card->options.vnicc.set_char_sup &= ~vnicc;
1939 }
1940 /* enforce assumed default values and recover settings, if changed */
1941 error |= qeth_l2_vnicc_recover_timeout(card, QETH_VNICC_LEARNING,
1942 timeout);
1943 /* Change chars, if necessary */
1944 chars_tmp = card->options.vnicc.wanted_chars ^
1945 card->options.vnicc.cur_chars;
1946 chars_len = sizeof(card->options.vnicc.wanted_chars) * BITS_PER_BYTE;
1947 for_each_set_bit(i, &chars_tmp, chars_len) {
1948 vnicc = BIT(i);
1949 enable = card->options.vnicc.wanted_chars & vnicc;
1950 error |= qeth_l2_vnicc_recover_char(card, vnicc, enable);
1951 }
1952 if (error)
1953 dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
1954}
1955
1956/* configure default values of VNIC characteristics */
1957static void qeth_l2_vnicc_set_defaults(struct qeth_card *card)
1958{
1959 /* characteristics values */
1960 card->options.vnicc.sup_chars = QETH_VNICC_ALL;
1961 card->options.vnicc.cur_chars = QETH_VNICC_DEFAULT;
1962 card->options.vnicc.learning_timeout = QETH_VNICC_DEFAULT_TIMEOUT;
1963 /* supported commands */
1964 card->options.vnicc.set_char_sup = QETH_VNICC_ALL;
1965 card->options.vnicc.getset_timeout_sup = QETH_VNICC_LEARNING;
1966 /* settings wanted by users */
1967 card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
1968}
1969
1970module_init(qeth_l2_init);
1971module_exit(qeth_l2_exit);
1972MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1973MODULE_DESCRIPTION("qeth layer 2 discipline");
1974MODULE_LICENSE("GPL");