1 /*
2 * Copyright (c) 2012-2017 Qualcomm Atheros, Inc.
3 * Copyright (c) 2018-2019, The Linux Foundation. All rights reserved.
4 *
5 * Permission to use, copy, modify, and/or distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18 #include <linux/etherdevice.h>
19 #include <linux/rtnetlink.h>
20 #include "wil6210.h"
21 #include "txrx.h"
22
wil_has_other_active_ifaces(struct wil6210_priv * wil,struct net_device * ndev,bool up,bool ok)23 bool wil_has_other_active_ifaces(struct wil6210_priv *wil,
24 struct net_device *ndev, bool up, bool ok)
25 {
26 int i;
27 struct wil6210_vif *vif;
28 struct net_device *ndev_i;
29
30 for (i = 0; i < GET_MAX_VIFS(wil); i++) {
31 vif = wil->vifs[i];
32 if (vif) {
33 ndev_i = vif_to_ndev(vif);
34 if (ndev_i != ndev)
35 if ((up && (ndev_i->flags & IFF_UP)) ||
36 (ok && netif_carrier_ok(ndev_i)))
37 return true;
38 }
39 }
40
41 return false;
42 }
43
wil_has_active_ifaces(struct wil6210_priv * wil,bool up,bool ok)44 bool wil_has_active_ifaces(struct wil6210_priv *wil, bool up, bool ok)
45 {
46 /* use NULL ndev argument to check all interfaces */
47 return wil_has_other_active_ifaces(wil, NULL, up, ok);
48 }
49
wil_open(struct net_device * ndev)50 static int wil_open(struct net_device *ndev)
51 {
52 struct wil6210_priv *wil = ndev_to_wil(ndev);
53 int rc = 0;
54
55 wil_dbg_misc(wil, "open\n");
56
57 if (debug_fw ||
58 test_bit(WMI_FW_CAPABILITY_WMI_ONLY, wil->fw_capabilities)) {
59 wil_err(wil, "while in debug_fw or wmi_only mode\n");
60 return -EINVAL;
61 }
62
63 if (!wil_has_other_active_ifaces(wil, ndev, true, false)) {
64 wil_dbg_misc(wil, "open, first iface\n");
65 rc = wil_pm_runtime_get(wil);
66 if (rc < 0)
67 return rc;
68
69 rc = wil_up(wil);
70 if (rc)
71 wil_pm_runtime_put(wil);
72 }
73
74 return rc;
75 }
76
wil_stop(struct net_device * ndev)77 static int wil_stop(struct net_device *ndev)
78 {
79 struct wil6210_priv *wil = ndev_to_wil(ndev);
80 int rc = 0;
81
82 wil_dbg_misc(wil, "stop\n");
83
84 if (!wil_has_other_active_ifaces(wil, ndev, true, false)) {
85 wil_dbg_misc(wil, "stop, last iface\n");
86 rc = wil_down(wil);
87 if (!rc)
88 wil_pm_runtime_put(wil);
89 }
90
91 return rc;
92 }
93
94 static const struct net_device_ops wil_netdev_ops = {
95 .ndo_open = wil_open,
96 .ndo_stop = wil_stop,
97 .ndo_start_xmit = wil_start_xmit,
98 .ndo_set_mac_address = eth_mac_addr,
99 .ndo_validate_addr = eth_validate_addr,
100 };
101
wil6210_netdev_poll_rx(struct napi_struct * napi,int budget)102 static int wil6210_netdev_poll_rx(struct napi_struct *napi, int budget)
103 {
104 struct wil6210_priv *wil = container_of(napi, struct wil6210_priv,
105 napi_rx);
106 int quota = budget;
107 int done;
108
109 wil_rx_handle(wil, "a);
110 done = budget - quota;
111
112 if (done < budget) {
113 napi_complete_done(napi, done);
114 wil6210_unmask_irq_rx(wil);
115 wil_dbg_txrx(wil, "NAPI RX complete\n");
116 }
117
118 wil_dbg_txrx(wil, "NAPI RX poll(%d) done %d\n", budget, done);
119
120 return done;
121 }
122
wil6210_netdev_poll_rx_edma(struct napi_struct * napi,int budget)123 static int wil6210_netdev_poll_rx_edma(struct napi_struct *napi, int budget)
124 {
125 struct wil6210_priv *wil = container_of(napi, struct wil6210_priv,
126 napi_rx);
127 int quota = budget;
128 int done;
129
130 wil_rx_handle_edma(wil, "a);
131 done = budget - quota;
132
133 if (done < budget) {
134 napi_complete_done(napi, done);
135 wil6210_unmask_irq_rx_edma(wil);
136 wil_dbg_txrx(wil, "NAPI RX complete\n");
137 }
138
139 wil_dbg_txrx(wil, "NAPI RX poll(%d) done %d\n", budget, done);
140
141 return done;
142 }
143
wil6210_netdev_poll_tx(struct napi_struct * napi,int budget)144 static int wil6210_netdev_poll_tx(struct napi_struct *napi, int budget)
145 {
146 struct wil6210_priv *wil = container_of(napi, struct wil6210_priv,
147 napi_tx);
148 int tx_done = 0;
149 uint i;
150
151 /* always process ALL Tx complete, regardless budget - it is fast */
152 for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
153 struct wil_ring *ring = &wil->ring_tx[i];
154 struct wil_ring_tx_data *txdata = &wil->ring_tx_data[i];
155 struct wil6210_vif *vif;
156
157 if (!ring->va || !txdata->enabled ||
158 txdata->mid >= GET_MAX_VIFS(wil))
159 continue;
160
161 vif = wil->vifs[txdata->mid];
162 if (unlikely(!vif)) {
163 wil_dbg_txrx(wil, "Invalid MID %d\n", txdata->mid);
164 continue;
165 }
166
167 tx_done += wil_tx_complete(vif, i);
168 }
169
170 if (tx_done < budget) {
171 napi_complete(napi);
172 wil6210_unmask_irq_tx(wil);
173 wil_dbg_txrx(wil, "NAPI TX complete\n");
174 }
175
176 wil_dbg_txrx(wil, "NAPI TX poll(%d) done %d\n", budget, tx_done);
177
178 return min(tx_done, budget);
179 }
180
wil6210_netdev_poll_tx_edma(struct napi_struct * napi,int budget)181 static int wil6210_netdev_poll_tx_edma(struct napi_struct *napi, int budget)
182 {
183 struct wil6210_priv *wil = container_of(napi, struct wil6210_priv,
184 napi_tx);
185 int tx_done;
186 /* There is only one status TX ring */
187 struct wil_status_ring *sring = &wil->srings[wil->tx_sring_idx];
188
189 if (!sring->va)
190 return 0;
191
192 tx_done = wil_tx_sring_handler(wil, sring);
193
194 if (tx_done < budget) {
195 napi_complete(napi);
196 wil6210_unmask_irq_tx_edma(wil);
197 wil_dbg_txrx(wil, "NAPI TX complete\n");
198 }
199
200 wil_dbg_txrx(wil, "NAPI TX poll(%d) done %d\n", budget, tx_done);
201
202 return min(tx_done, budget);
203 }
204
wil_dev_setup(struct net_device * dev)205 static void wil_dev_setup(struct net_device *dev)
206 {
207 ether_setup(dev);
208 dev->max_mtu = mtu_max;
209 dev->tx_queue_len = WIL_TX_Q_LEN_DEFAULT;
210 }
211
wil_vif_deinit(struct wil6210_vif * vif)212 static void wil_vif_deinit(struct wil6210_vif *vif)
213 {
214 del_timer_sync(&vif->scan_timer);
215 del_timer_sync(&vif->p2p.discovery_timer);
216 cancel_work_sync(&vif->disconnect_worker);
217 cancel_work_sync(&vif->p2p.discovery_expired_work);
218 cancel_work_sync(&vif->p2p.delayed_listen_work);
219 wil_probe_client_flush(vif);
220 cancel_work_sync(&vif->probe_client_worker);
221 cancel_work_sync(&vif->enable_tx_key_worker);
222 }
223
wil_vif_free(struct wil6210_vif * vif)224 void wil_vif_free(struct wil6210_vif *vif)
225 {
226 struct net_device *ndev = vif_to_ndev(vif);
227
228 wil_vif_deinit(vif);
229 free_netdev(ndev);
230 }
231
wil_ndev_destructor(struct net_device * ndev)232 static void wil_ndev_destructor(struct net_device *ndev)
233 {
234 struct wil6210_vif *vif = ndev_to_vif(ndev);
235
236 wil_vif_deinit(vif);
237 }
238
wil_connect_timer_fn(struct timer_list * t)239 static void wil_connect_timer_fn(struct timer_list *t)
240 {
241 struct wil6210_vif *vif = from_timer(vif, t, connect_timer);
242 struct wil6210_priv *wil = vif_to_wil(vif);
243 bool q;
244
245 wil_err(wil, "Connect timeout detected, disconnect station\n");
246
247 /* reschedule to thread context - disconnect won't
248 * run from atomic context.
249 * queue on wmi_wq to prevent race with connect event.
250 */
251 q = queue_work(wil->wmi_wq, &vif->disconnect_worker);
252 wil_dbg_wmi(wil, "queue_work of disconnect_worker -> %d\n", q);
253 }
254
wil_scan_timer_fn(struct timer_list * t)255 static void wil_scan_timer_fn(struct timer_list *t)
256 {
257 struct wil6210_vif *vif = from_timer(vif, t, scan_timer);
258 struct wil6210_priv *wil = vif_to_wil(vif);
259
260 clear_bit(wil_status_fwready, wil->status);
261 wil_err(wil, "Scan timeout detected, start fw error recovery\n");
262 wil_fw_error_recovery(wil);
263 }
264
wil_p2p_discovery_timer_fn(struct timer_list * t)265 static void wil_p2p_discovery_timer_fn(struct timer_list *t)
266 {
267 struct wil6210_vif *vif = from_timer(vif, t, p2p.discovery_timer);
268 struct wil6210_priv *wil = vif_to_wil(vif);
269
270 wil_dbg_misc(wil, "p2p_discovery_timer_fn\n");
271
272 schedule_work(&vif->p2p.discovery_expired_work);
273 }
274
wil_vif_init(struct wil6210_vif * vif)275 static void wil_vif_init(struct wil6210_vif *vif)
276 {
277 vif->bcast_ring = -1;
278
279 mutex_init(&vif->probe_client_mutex);
280
281 timer_setup(&vif->connect_timer, wil_connect_timer_fn, 0);
282 timer_setup(&vif->scan_timer, wil_scan_timer_fn, 0);
283 timer_setup(&vif->p2p.discovery_timer, wil_p2p_discovery_timer_fn, 0);
284
285 INIT_WORK(&vif->probe_client_worker, wil_probe_client_worker);
286 INIT_WORK(&vif->disconnect_worker, wil_disconnect_worker);
287 INIT_WORK(&vif->p2p.discovery_expired_work, wil_p2p_listen_expired);
288 INIT_WORK(&vif->p2p.delayed_listen_work, wil_p2p_delayed_listen_work);
289 INIT_WORK(&vif->enable_tx_key_worker, wil_enable_tx_key_worker);
290
291 INIT_LIST_HEAD(&vif->probe_client_pending);
292
293 vif->net_queue_stopped = 1;
294 }
295
wil_vif_find_free_mid(struct wil6210_priv * wil)296 static u8 wil_vif_find_free_mid(struct wil6210_priv *wil)
297 {
298 u8 i;
299
300 for (i = 0; i < GET_MAX_VIFS(wil); i++) {
301 if (!wil->vifs[i])
302 return i;
303 }
304
305 return U8_MAX;
306 }
307
308 struct wil6210_vif *
wil_vif_alloc(struct wil6210_priv * wil,const char * name,unsigned char name_assign_type,enum nl80211_iftype iftype)309 wil_vif_alloc(struct wil6210_priv *wil, const char *name,
310 unsigned char name_assign_type, enum nl80211_iftype iftype)
311 {
312 struct net_device *ndev;
313 struct wireless_dev *wdev;
314 struct wil6210_vif *vif;
315 u8 mid;
316
317 mid = wil_vif_find_free_mid(wil);
318 if (mid == U8_MAX) {
319 wil_err(wil, "no available virtual interface\n");
320 return ERR_PTR(-EINVAL);
321 }
322
323 ndev = alloc_netdev(sizeof(*vif), name, name_assign_type,
324 wil_dev_setup);
325 if (!ndev) {
326 dev_err(wil_to_dev(wil), "alloc_netdev failed\n");
327 return ERR_PTR(-ENOMEM);
328 }
329 if (mid == 0) {
330 wil->main_ndev = ndev;
331 } else {
332 ndev->priv_destructor = wil_ndev_destructor;
333 ndev->needs_free_netdev = true;
334 }
335
336 vif = ndev_to_vif(ndev);
337 vif->ndev = ndev;
338 vif->wil = wil;
339 vif->mid = mid;
340 wil_vif_init(vif);
341
342 wdev = &vif->wdev;
343 wdev->wiphy = wil->wiphy;
344 wdev->iftype = iftype;
345
346 ndev->netdev_ops = &wil_netdev_ops;
347 wil_set_ethtoolops(ndev);
348 ndev->ieee80211_ptr = wdev;
349 ndev->hw_features = NETIF_F_HW_CSUM | NETIF_F_RXCSUM |
350 NETIF_F_SG | NETIF_F_GRO |
351 NETIF_F_TSO | NETIF_F_TSO6;
352
353 ndev->features |= ndev->hw_features;
354 SET_NETDEV_DEV(ndev, wiphy_dev(wdev->wiphy));
355 wdev->netdev = ndev;
356 return vif;
357 }
358
wil_if_alloc(struct device * dev)359 void *wil_if_alloc(struct device *dev)
360 {
361 struct wil6210_priv *wil;
362 struct wil6210_vif *vif;
363 int rc = 0;
364
365 wil = wil_cfg80211_init(dev);
366 if (IS_ERR(wil)) {
367 dev_err(dev, "wil_cfg80211_init failed\n");
368 return wil;
369 }
370
371 rc = wil_priv_init(wil);
372 if (rc) {
373 dev_err(dev, "wil_priv_init failed\n");
374 goto out_cfg;
375 }
376
377 wil_dbg_misc(wil, "if_alloc\n");
378
379 vif = wil_vif_alloc(wil, "wlan%d", NET_NAME_UNKNOWN,
380 NL80211_IFTYPE_STATION);
381 if (IS_ERR(vif)) {
382 dev_err(dev, "wil_vif_alloc failed\n");
383 rc = -ENOMEM;
384 goto out_priv;
385 }
386
387 wil->radio_wdev = vif_to_wdev(vif);
388
389 return wil;
390
391 out_priv:
392 wil_priv_deinit(wil);
393
394 out_cfg:
395 wil_cfg80211_deinit(wil);
396
397 return ERR_PTR(rc);
398 }
399
wil_if_free(struct wil6210_priv * wil)400 void wil_if_free(struct wil6210_priv *wil)
401 {
402 struct net_device *ndev = wil->main_ndev;
403
404 wil_dbg_misc(wil, "if_free\n");
405
406 if (!ndev)
407 return;
408
409 wil_priv_deinit(wil);
410
411 wil->main_ndev = NULL;
412 wil_ndev_destructor(ndev);
413 free_netdev(ndev);
414
415 wil_cfg80211_deinit(wil);
416 }
417
wil_vif_add(struct wil6210_priv * wil,struct wil6210_vif * vif)418 int wil_vif_add(struct wil6210_priv *wil, struct wil6210_vif *vif)
419 {
420 struct net_device *ndev = vif_to_ndev(vif);
421 struct wireless_dev *wdev = vif_to_wdev(vif);
422 bool any_active = wil_has_active_ifaces(wil, true, false);
423 int rc;
424
425 ASSERT_RTNL();
426
427 if (wil->vifs[vif->mid]) {
428 dev_err(&ndev->dev, "VIF with mid %d already in use\n",
429 vif->mid);
430 return -EEXIST;
431 }
432 if (any_active && vif->mid != 0) {
433 rc = wmi_port_allocate(wil, vif->mid, ndev->dev_addr,
434 wdev->iftype);
435 if (rc)
436 return rc;
437 }
438 rc = register_netdevice(ndev);
439 if (rc < 0) {
440 dev_err(&ndev->dev, "Failed to register netdev: %d\n", rc);
441 if (any_active && vif->mid != 0)
442 wmi_port_delete(wil, vif->mid);
443 return rc;
444 }
445
446 wil->vifs[vif->mid] = vif;
447 return 0;
448 }
449
wil_if_add(struct wil6210_priv * wil)450 int wil_if_add(struct wil6210_priv *wil)
451 {
452 struct wiphy *wiphy = wil->wiphy;
453 struct net_device *ndev = wil->main_ndev;
454 struct wil6210_vif *vif = ndev_to_vif(ndev);
455 int rc;
456
457 wil_dbg_misc(wil, "entered");
458
459 strlcpy(wiphy->fw_version, wil->fw_version, sizeof(wiphy->fw_version));
460
461 rc = wiphy_register(wiphy);
462 if (rc < 0) {
463 wil_err(wil, "failed to register wiphy, err %d\n", rc);
464 return rc;
465 }
466
467 init_dummy_netdev(&wil->napi_ndev);
468 if (wil->use_enhanced_dma_hw) {
469 netif_napi_add(&wil->napi_ndev, &wil->napi_rx,
470 wil6210_netdev_poll_rx_edma,
471 WIL6210_NAPI_BUDGET);
472 netif_tx_napi_add(&wil->napi_ndev,
473 &wil->napi_tx, wil6210_netdev_poll_tx_edma,
474 WIL6210_NAPI_BUDGET);
475 } else {
476 netif_napi_add(&wil->napi_ndev, &wil->napi_rx,
477 wil6210_netdev_poll_rx,
478 WIL6210_NAPI_BUDGET);
479 netif_tx_napi_add(&wil->napi_ndev,
480 &wil->napi_tx, wil6210_netdev_poll_tx,
481 WIL6210_NAPI_BUDGET);
482 }
483
484 wil_update_net_queues_bh(wil, vif, NULL, true);
485
486 rtnl_lock();
487 rc = wil_vif_add(wil, vif);
488 rtnl_unlock();
489 if (rc < 0)
490 goto out_wiphy;
491
492 return 0;
493
494 out_wiphy:
495 wiphy_unregister(wiphy);
496 return rc;
497 }
498
wil_vif_remove(struct wil6210_priv * wil,u8 mid)499 void wil_vif_remove(struct wil6210_priv *wil, u8 mid)
500 {
501 struct wil6210_vif *vif;
502 struct net_device *ndev;
503 bool any_active = wil_has_active_ifaces(wil, true, false);
504
505 ASSERT_RTNL();
506 if (mid >= GET_MAX_VIFS(wil)) {
507 wil_err(wil, "invalid MID: %d\n", mid);
508 return;
509 }
510
511 vif = wil->vifs[mid];
512 if (!vif) {
513 wil_err(wil, "MID %d not registered\n", mid);
514 return;
515 }
516
517 mutex_lock(&wil->mutex);
518 wil6210_disconnect(vif, NULL, WLAN_REASON_DEAUTH_LEAVING);
519 mutex_unlock(&wil->mutex);
520
521 ndev = vif_to_ndev(vif);
522 /* during unregister_netdevice cfg80211_leave may perform operations
523 * such as stop AP, disconnect, so we only clear the VIF afterwards
524 */
525 unregister_netdevice(ndev);
526
527 if (any_active && vif->mid != 0)
528 wmi_port_delete(wil, vif->mid);
529
530 /* make sure no one is accessing the VIF before removing */
531 mutex_lock(&wil->vif_mutex);
532 wil->vifs[mid] = NULL;
533 /* ensure NAPI code will see the NULL VIF */
534 wmb();
535 if (test_bit(wil_status_napi_en, wil->status)) {
536 napi_synchronize(&wil->napi_rx);
537 napi_synchronize(&wil->napi_tx);
538 }
539 mutex_unlock(&wil->vif_mutex);
540
541 flush_work(&wil->wmi_event_worker);
542 del_timer_sync(&vif->connect_timer);
543 cancel_work_sync(&vif->disconnect_worker);
544 wil_probe_client_flush(vif);
545 cancel_work_sync(&vif->probe_client_worker);
546 cancel_work_sync(&vif->enable_tx_key_worker);
547 /* for VIFs, ndev will be freed by destructor after RTNL is unlocked.
548 * the main interface will be freed in wil_if_free, we need to keep it
549 * a bit longer so logging macros will work.
550 */
551 }
552
wil_if_remove(struct wil6210_priv * wil)553 void wil_if_remove(struct wil6210_priv *wil)
554 {
555 struct net_device *ndev = wil->main_ndev;
556 struct wireless_dev *wdev = ndev->ieee80211_ptr;
557
558 wil_dbg_misc(wil, "if_remove\n");
559
560 rtnl_lock();
561 wil_vif_remove(wil, 0);
562 rtnl_unlock();
563
564 netif_napi_del(&wil->napi_tx);
565 netif_napi_del(&wil->napi_rx);
566
567 wiphy_unregister(wdev->wiphy);
568 }
569
