1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
|
/*
* Copyright (c) 2015-2016 Quantenna Communications, Inc.
* All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/if_ether.h>
#include "core.h"
#include "bus.h"
#include "trans.h"
#include "commands.h"
#include "cfg80211.h"
#include "event.h"
#include "util.h"
#define QTNF_DMP_MAX_LEN 48
#define QTNF_PRIMARY_VIF_IDX 0
struct qtnf_frame_meta_info {
u8 magic_s;
u8 ifidx;
u8 macid;
u8 magic_e;
} __packed;
struct qtnf_wmac *qtnf_core_get_mac(const struct qtnf_bus *bus, u8 macid)
{
struct qtnf_wmac *mac = NULL;
if (unlikely(macid >= QTNF_MAX_MAC)) {
pr_err("invalid MAC index %u\n", macid);
return NULL;
}
mac = bus->mac[macid];
if (unlikely(!mac)) {
pr_err("MAC%u: not initialized\n", macid);
return NULL;
}
return mac;
}
/* Netdev handler for open.
*/
static int qtnf_netdev_open(struct net_device *ndev)
{
netif_carrier_off(ndev);
qtnf_netdev_updown(ndev, 1);
return 0;
}
/* Netdev handler for close.
*/
static int qtnf_netdev_close(struct net_device *ndev)
{
netif_carrier_off(ndev);
qtnf_virtual_intf_cleanup(ndev);
qtnf_netdev_updown(ndev, 0);
return 0;
}
/* Netdev handler for data transmission.
*/
static int
qtnf_netdev_hard_start_xmit(struct sk_buff *skb, struct net_device *ndev)
{
struct qtnf_vif *vif;
struct qtnf_wmac *mac;
vif = qtnf_netdev_get_priv(ndev);
if (unlikely(skb->dev != ndev)) {
pr_err_ratelimited("invalid skb->dev");
dev_kfree_skb_any(skb);
return 0;
}
if (unlikely(vif->wdev.iftype == NL80211_IFTYPE_UNSPECIFIED)) {
pr_err_ratelimited("%s: VIF not initialized\n", ndev->name);
dev_kfree_skb_any(skb);
return 0;
}
mac = vif->mac;
if (unlikely(!mac)) {
pr_err_ratelimited("%s: NULL mac pointer", ndev->name);
dev_kfree_skb_any(skb);
return 0;
}
if (!skb->len || (skb->len > ETH_FRAME_LEN)) {
pr_err_ratelimited("%s: invalid skb len %d\n", ndev->name,
skb->len);
dev_kfree_skb_any(skb);
ndev->stats.tx_dropped++;
return 0;
}
/* tx path is enabled: reset vif timeout */
vif->cons_tx_timeout_cnt = 0;
return qtnf_bus_data_tx(mac->bus, skb);
}
/* Netdev handler for getting stats.
*/
static struct net_device_stats *qtnf_netdev_get_stats(struct net_device *dev)
{
return &dev->stats;
}
/* Netdev handler for transmission timeout.
*/
static void qtnf_netdev_tx_timeout(struct net_device *ndev)
{
struct qtnf_vif *vif = qtnf_netdev_get_priv(ndev);
struct qtnf_wmac *mac;
struct qtnf_bus *bus;
if (unlikely(!vif || !vif->mac || !vif->mac->bus))
return;
mac = vif->mac;
bus = mac->bus;
pr_warn("VIF%u.%u: Tx timeout- %lu\n", mac->macid, vif->vifid, jiffies);
qtnf_bus_data_tx_timeout(bus, ndev);
ndev->stats.tx_errors++;
if (++vif->cons_tx_timeout_cnt > QTNF_TX_TIMEOUT_TRSHLD) {
pr_err("Tx timeout threshold exceeded !\n");
pr_err("schedule interface %s reset !\n", netdev_name(ndev));
queue_work(bus->workqueue, &vif->reset_work);
}
}
/* Network device ops handlers */
const struct net_device_ops qtnf_netdev_ops = {
.ndo_open = qtnf_netdev_open,
.ndo_stop = qtnf_netdev_close,
.ndo_start_xmit = qtnf_netdev_hard_start_xmit,
.ndo_tx_timeout = qtnf_netdev_tx_timeout,
.ndo_get_stats = qtnf_netdev_get_stats,
};
static int qtnf_mac_init_single_band(struct wiphy *wiphy,
struct qtnf_wmac *mac,
enum nl80211_band band)
{
int ret;
wiphy->bands[band] = kzalloc(sizeof(*wiphy->bands[band]), GFP_KERNEL);
if (!wiphy->bands[band])
return -ENOMEM;
wiphy->bands[band]->band = band;
ret = qtnf_cmd_get_mac_chan_info(mac, wiphy->bands[band]);
if (ret) {
pr_err("MAC%u: band %u: failed to get chans info: %d\n",
mac->macid, band, ret);
return ret;
}
qtnf_band_init_rates(wiphy->bands[band]);
qtnf_band_setup_htvht_caps(&mac->macinfo, wiphy->bands[band]);
return 0;
}
static int qtnf_mac_init_bands(struct qtnf_wmac *mac)
{
struct wiphy *wiphy = priv_to_wiphy(mac);
int ret = 0;
if (mac->macinfo.bands_cap & QLINK_BAND_2GHZ) {
ret = qtnf_mac_init_single_band(wiphy, mac, NL80211_BAND_2GHZ);
if (ret)
goto out;
}
if (mac->macinfo.bands_cap & QLINK_BAND_5GHZ) {
ret = qtnf_mac_init_single_band(wiphy, mac, NL80211_BAND_5GHZ);
if (ret)
goto out;
}
if (mac->macinfo.bands_cap & QLINK_BAND_60GHZ)
ret = qtnf_mac_init_single_band(wiphy, mac, NL80211_BAND_60GHZ);
out:
return ret;
}
struct qtnf_vif *qtnf_mac_get_free_vif(struct qtnf_wmac *mac)
{
struct qtnf_vif *vif;
int i;
for (i = 0; i < QTNF_MAX_INTF; i++) {
vif = &mac->iflist[i];
if (vif->wdev.iftype == NL80211_IFTYPE_UNSPECIFIED)
return vif;
}
return NULL;
}
struct qtnf_vif *qtnf_mac_get_base_vif(struct qtnf_wmac *mac)
{
struct qtnf_vif *vif;
vif = &mac->iflist[QTNF_PRIMARY_VIF_IDX];
if (vif->wdev.iftype == NL80211_IFTYPE_UNSPECIFIED)
return NULL;
return vif;
}
static void qtnf_vif_reset_handler(struct work_struct *work)
{
struct qtnf_vif *vif = container_of(work, struct qtnf_vif, reset_work);
rtnl_lock();
if (vif->wdev.iftype == NL80211_IFTYPE_UNSPECIFIED) {
rtnl_unlock();
return;
}
/* stop tx completely */
netif_tx_stop_all_queues(vif->netdev);
if (netif_carrier_ok(vif->netdev))
netif_carrier_off(vif->netdev);
qtnf_cfg80211_vif_reset(vif);
rtnl_unlock();
}
static void qtnf_mac_init_primary_intf(struct qtnf_wmac *mac)
{
struct qtnf_vif *vif = &mac->iflist[QTNF_PRIMARY_VIF_IDX];
vif->wdev.iftype = NL80211_IFTYPE_AP;
vif->bss_priority = QTNF_DEF_BSS_PRIORITY;
vif->wdev.wiphy = priv_to_wiphy(mac);
INIT_WORK(&vif->reset_work, qtnf_vif_reset_handler);
vif->cons_tx_timeout_cnt = 0;
}
static struct qtnf_wmac *qtnf_core_mac_alloc(struct qtnf_bus *bus,
unsigned int macid)
{
struct wiphy *wiphy;
struct qtnf_wmac *mac;
unsigned int i;
wiphy = qtnf_wiphy_allocate(bus);
if (!wiphy)
return ERR_PTR(-ENOMEM);
mac = wiphy_priv(wiphy);
mac->macid = macid;
mac->bus = bus;
for (i = 0; i < QTNF_MAX_INTF; i++) {
memset(&mac->iflist[i], 0, sizeof(struct qtnf_vif));
mac->iflist[i].wdev.iftype = NL80211_IFTYPE_UNSPECIFIED;
mac->iflist[i].mac = mac;
mac->iflist[i].vifid = i;
qtnf_sta_list_init(&mac->iflist[i].sta_list);
}
qtnf_mac_init_primary_intf(mac);
bus->mac[macid] = mac;
return mac;
}
int qtnf_core_net_attach(struct qtnf_wmac *mac, struct qtnf_vif *vif,
const char *name, unsigned char name_assign_type,
enum nl80211_iftype iftype)
{
struct wiphy *wiphy = priv_to_wiphy(mac);
struct net_device *dev;
void *qdev_vif;
int ret;
dev = alloc_netdev_mqs(sizeof(struct qtnf_vif *), name,
name_assign_type, ether_setup, 1, 1);
if (!dev) {
memset(&vif->wdev, 0, sizeof(vif->wdev));
vif->wdev.iftype = NL80211_IFTYPE_UNSPECIFIED;
return -ENOMEM;
}
vif->netdev = dev;
dev->netdev_ops = &qtnf_netdev_ops;
dev->needs_free_netdev = true;
dev_net_set(dev, wiphy_net(wiphy));
dev->ieee80211_ptr = &vif->wdev;
dev->ieee80211_ptr->iftype = iftype;
ether_addr_copy(dev->dev_addr, vif->mac_addr);
SET_NETDEV_DEV(dev, wiphy_dev(wiphy));
dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
dev->watchdog_timeo = QTNF_DEF_WDOG_TIMEOUT;
dev->tx_queue_len = 100;
qdev_vif = netdev_priv(dev);
*((void **)qdev_vif) = vif;
SET_NETDEV_DEV(dev, mac->bus->dev);
ret = register_netdevice(dev);
if (ret) {
free_netdev(dev);
vif->wdev.iftype = NL80211_IFTYPE_UNSPECIFIED;
}
return ret;
}
static void qtnf_core_mac_detach(struct qtnf_bus *bus, unsigned int macid)
{
struct qtnf_wmac *mac;
struct wiphy *wiphy;
struct qtnf_vif *vif;
unsigned int i;
enum nl80211_band band;
mac = bus->mac[macid];
if (!mac)
return;
wiphy = priv_to_wiphy(mac);
for (i = 0; i < QTNF_MAX_INTF; i++) {
vif = &mac->iflist[i];
rtnl_lock();
if (vif->netdev &&
vif->wdev.iftype != NL80211_IFTYPE_UNSPECIFIED) {
qtnf_virtual_intf_cleanup(vif->netdev);
qtnf_del_virtual_intf(wiphy, &vif->wdev);
}
rtnl_unlock();
qtnf_sta_list_free(&vif->sta_list);
}
if (mac->wiphy_registered)
wiphy_unregister(wiphy);
for (band = NL80211_BAND_2GHZ; band < NUM_NL80211_BANDS; ++band) {
if (!wiphy->bands[band])
continue;
kfree(wiphy->bands[band]->channels);
wiphy->bands[band]->n_channels = 0;
kfree(wiphy->bands[band]);
wiphy->bands[band] = NULL;
}
kfree(mac->macinfo.limits);
kfree(wiphy->iface_combinations);
wiphy_free(wiphy);
bus->mac[macid] = NULL;
}
static int qtnf_core_mac_attach(struct qtnf_bus *bus, unsigned int macid)
{
struct qtnf_wmac *mac;
struct qtnf_vif *vif;
int ret;
if (!(bus->hw_info.mac_bitmap & BIT(macid))) {
pr_info("MAC%u is not active in FW\n", macid);
return 0;
}
mac = qtnf_core_mac_alloc(bus, macid);
if (IS_ERR(mac)) {
pr_err("MAC%u allocation failed\n", macid);
return PTR_ERR(mac);
}
ret = qtnf_cmd_get_mac_info(mac);
if (ret) {
pr_err("MAC%u: failed to get info\n", macid);
goto error;
}
vif = qtnf_mac_get_base_vif(mac);
if (!vif) {
pr_err("MAC%u: primary VIF is not ready\n", macid);
ret = -EFAULT;
goto error;
}
ret = qtnf_cmd_send_add_intf(vif, NL80211_IFTYPE_AP, vif->mac_addr);
if (ret) {
pr_err("MAC%u: failed to add VIF\n", macid);
goto error;
}
ret = qtnf_cmd_send_get_phy_params(mac);
if (ret) {
pr_err("MAC%u: failed to get PHY settings\n", macid);
goto error;
}
ret = qtnf_mac_init_bands(mac);
if (ret) {
pr_err("MAC%u: failed to init bands\n", macid);
goto error;
}
ret = qtnf_wiphy_register(&bus->hw_info, mac);
if (ret) {
pr_err("MAC%u: wiphy registration failed\n", macid);
goto error;
}
mac->wiphy_registered = 1;
rtnl_lock();
ret = qtnf_core_net_attach(mac, vif, "wlan%d", NET_NAME_ENUM,
NL80211_IFTYPE_AP);
rtnl_unlock();
if (ret) {
pr_err("MAC%u: failed to attach netdev\n", macid);
vif->wdev.iftype = NL80211_IFTYPE_UNSPECIFIED;
vif->netdev = NULL;
goto error;
}
pr_debug("MAC%u initialized\n", macid);
return 0;
error:
qtnf_core_mac_detach(bus, macid);
return ret;
}
int qtnf_core_attach(struct qtnf_bus *bus)
{
unsigned int i;
int ret;
qtnf_trans_init(bus);
bus->fw_state = QTNF_FW_STATE_BOOT_DONE;
qtnf_bus_data_rx_start(bus);
bus->workqueue = alloc_ordered_workqueue("QTNF_BUS", 0);
if (!bus->workqueue) {
pr_err("failed to alloc main workqueue\n");
ret = -ENOMEM;
goto error;
}
INIT_WORK(&bus->event_work, qtnf_event_work_handler);
ret = qtnf_cmd_send_init_fw(bus);
if (ret) {
pr_err("failed to init FW: %d\n", ret);
goto error;
}
bus->fw_state = QTNF_FW_STATE_ACTIVE;
ret = qtnf_cmd_get_hw_info(bus);
if (ret) {
pr_err("failed to get HW info: %d\n", ret);
goto error;
}
if (bus->hw_info.ql_proto_ver != QLINK_PROTO_VER) {
pr_err("qlink version mismatch %u != %u\n",
QLINK_PROTO_VER, bus->hw_info.ql_proto_ver);
ret = -EPROTONOSUPPORT;
goto error;
}
if (bus->hw_info.num_mac > QTNF_MAX_MAC) {
pr_err("no support for number of MACs=%u\n",
bus->hw_info.num_mac);
ret = -ERANGE;
goto error;
}
for (i = 0; i < bus->hw_info.num_mac; i++) {
ret = qtnf_core_mac_attach(bus, i);
if (ret) {
pr_err("MAC%u: attach failed: %d\n", i, ret);
goto error;
}
}
return 0;
error:
qtnf_core_detach(bus);
return ret;
}
EXPORT_SYMBOL_GPL(qtnf_core_attach);
void qtnf_core_detach(struct qtnf_bus *bus)
{
unsigned int macid;
qtnf_bus_data_rx_stop(bus);
for (macid = 0; macid < QTNF_MAX_MAC; macid++)
qtnf_core_mac_detach(bus, macid);
if (bus->fw_state == QTNF_FW_STATE_ACTIVE)
qtnf_cmd_send_deinit_fw(bus);
bus->fw_state = QTNF_FW_STATE_DEAD;
if (bus->workqueue) {
flush_workqueue(bus->workqueue);
destroy_workqueue(bus->workqueue);
}
kfree(bus->hw_info.rd);
bus->hw_info.rd = NULL;
qtnf_trans_free(bus);
}
EXPORT_SYMBOL_GPL(qtnf_core_detach);
static inline int qtnf_is_frame_meta_magic_valid(struct qtnf_frame_meta_info *m)
{
return m->magic_s == 0xAB && m->magic_e == 0xBA;
}
struct net_device *qtnf_classify_skb(struct qtnf_bus *bus, struct sk_buff *skb)
{
struct qtnf_frame_meta_info *meta;
struct net_device *ndev = NULL;
struct qtnf_wmac *mac;
struct qtnf_vif *vif;
meta = (struct qtnf_frame_meta_info *)
(skb_tail_pointer(skb) - sizeof(*meta));
if (unlikely(!qtnf_is_frame_meta_magic_valid(meta))) {
pr_err_ratelimited("invalid magic 0x%x:0x%x\n",
meta->magic_s, meta->magic_e);
goto out;
}
if (unlikely(meta->macid >= QTNF_MAX_MAC)) {
pr_err_ratelimited("invalid mac(%u)\n", meta->macid);
goto out;
}
if (unlikely(meta->ifidx >= QTNF_MAX_INTF)) {
pr_err_ratelimited("invalid vif(%u)\n", meta->ifidx);
goto out;
}
mac = bus->mac[meta->macid];
if (unlikely(!mac)) {
pr_err_ratelimited("mac(%d) does not exist\n", meta->macid);
goto out;
}
vif = &mac->iflist[meta->ifidx];
if (unlikely(vif->wdev.iftype == NL80211_IFTYPE_UNSPECIFIED)) {
pr_err_ratelimited("vif(%u) does not exists\n", meta->ifidx);
goto out;
}
ndev = vif->netdev;
if (unlikely(!ndev)) {
pr_err_ratelimited("netdev for wlan%u.%u does not exists\n",
meta->macid, meta->ifidx);
goto out;
}
__skb_trim(skb, skb->len - sizeof(*meta));
out:
return ndev;
}
EXPORT_SYMBOL_GPL(qtnf_classify_skb);
MODULE_AUTHOR("Quantenna Communications");
MODULE_DESCRIPTION("Quantenna 802.11 wireless LAN FullMAC driver.");
MODULE_LICENSE("GPL");
|