1 // SPDX-License-Identifier: ISC
2 /*
3 * Copyright (c) 2012-2017 Qualcomm Atheros, Inc.
4 * Copyright (c) 2018-2019, The Linux Foundation. All rights reserved.
5 */
6
7 #include <linux/etherdevice.h>
8 #include <linux/rtnetlink.h>
9 #include "wil6210.h"
10 #include "txrx.h"
11
wil_has_other_active_ifaces(struct wil6210_priv * wil,struct net_device * ndev,bool up,bool ok)12 bool wil_has_other_active_ifaces(struct wil6210_priv *wil,
13 struct net_device *ndev, bool up, bool ok)
14 {
15 int i;
16 struct wil6210_vif *vif;
17 struct net_device *ndev_i;
18
19 for (i = 0; i < GET_MAX_VIFS(wil); i++) {
20 vif = wil->vifs[i];
21 if (vif) {
22 ndev_i = vif_to_ndev(vif);
23 if (ndev_i != ndev)
24 if ((up && (ndev_i->flags & IFF_UP)) ||
25 (ok && netif_carrier_ok(ndev_i)))
26 return true;
27 }
28 }
29
30 return false;
31 }
32
wil_has_active_ifaces(struct wil6210_priv * wil,bool up,bool ok)33 bool wil_has_active_ifaces(struct wil6210_priv *wil, bool up, bool ok)
34 {
35 /* use NULL ndev argument to check all interfaces */
36 return wil_has_other_active_ifaces(wil, NULL, up, ok);
37 }
38
wil_open(struct net_device * ndev)39 static int wil_open(struct net_device *ndev)
40 {
41 struct wil6210_priv *wil = ndev_to_wil(ndev);
42 int rc = 0;
43
44 wil_dbg_misc(wil, "open\n");
45
46 if (debug_fw ||
47 test_bit(WMI_FW_CAPABILITY_WMI_ONLY, wil->fw_capabilities)) {
48 wil_err(wil, "while in debug_fw or wmi_only mode\n");
49 return -EINVAL;
50 }
51
52 if (!wil_has_other_active_ifaces(wil, ndev, true, false)) {
53 wil_dbg_misc(wil, "open, first iface\n");
54 rc = wil_pm_runtime_get(wil);
55 if (rc < 0)
56 return rc;
57
58 rc = wil_up(wil);
59 if (rc)
60 wil_pm_runtime_put(wil);
61 }
62
63 return rc;
64 }
65
wil_stop(struct net_device * ndev)66 static int wil_stop(struct net_device *ndev)
67 {
68 struct wil6210_priv *wil = ndev_to_wil(ndev);
69 int rc = 0;
70
71 wil_dbg_misc(wil, "stop\n");
72
73 if (!wil_has_other_active_ifaces(wil, ndev, true, false)) {
74 wil_dbg_misc(wil, "stop, last iface\n");
75 rc = wil_down(wil);
76 if (!rc)
77 wil_pm_runtime_put(wil);
78 }
79
80 return rc;
81 }
82
83 static const struct net_device_ops wil_netdev_ops = {
84 .ndo_open = wil_open,
85 .ndo_stop = wil_stop,
86 .ndo_start_xmit = wil_start_xmit,
87 .ndo_set_mac_address = eth_mac_addr,
88 .ndo_validate_addr = eth_validate_addr,
89 };
90
wil6210_netdev_poll_rx(struct napi_struct * napi,int budget)91 static int wil6210_netdev_poll_rx(struct napi_struct *napi, int budget)
92 {
93 struct wil6210_priv *wil = container_of(napi, struct wil6210_priv,
94 napi_rx);
95 int quota = budget;
96 int done;
97
98 wil_rx_handle(wil, "a);
99 done = budget - quota;
100
101 if (done < budget) {
102 napi_complete_done(napi, done);
103 wil6210_unmask_irq_rx(wil);
104 wil_dbg_txrx(wil, "NAPI RX complete\n");
105 }
106
107 wil_dbg_txrx(wil, "NAPI RX poll(%d) done %d\n", budget, done);
108
109 return done;
110 }
111
wil6210_netdev_poll_rx_edma(struct napi_struct * napi,int budget)112 static int wil6210_netdev_poll_rx_edma(struct napi_struct *napi, int budget)
113 {
114 struct wil6210_priv *wil = container_of(napi, struct wil6210_priv,
115 napi_rx);
116 int quota = budget;
117 int done;
118
119 wil_rx_handle_edma(wil, "a);
120 done = budget - quota;
121
122 if (done < budget) {
123 napi_complete_done(napi, done);
124 wil6210_unmask_irq_rx_edma(wil);
125 wil_dbg_txrx(wil, "NAPI RX complete\n");
126 }
127
128 wil_dbg_txrx(wil, "NAPI RX poll(%d) done %d\n", budget, done);
129
130 return done;
131 }
132
wil6210_netdev_poll_tx(struct napi_struct * napi,int budget)133 static int wil6210_netdev_poll_tx(struct napi_struct *napi, int budget)
134 {
135 struct wil6210_priv *wil = container_of(napi, struct wil6210_priv,
136 napi_tx);
137 int tx_done = 0;
138 uint i;
139
140 /* always process ALL Tx complete, regardless budget - it is fast */
141 for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
142 struct wil_ring *ring = &wil->ring_tx[i];
143 struct wil_ring_tx_data *txdata = &wil->ring_tx_data[i];
144 struct wil6210_vif *vif;
145
146 if (!ring->va || !txdata->enabled ||
147 txdata->mid >= GET_MAX_VIFS(wil))
148 continue;
149
150 vif = wil->vifs[txdata->mid];
151 if (unlikely(!vif)) {
152 wil_dbg_txrx(wil, "Invalid MID %d\n", txdata->mid);
153 continue;
154 }
155
156 tx_done += wil_tx_complete(vif, i);
157 }
158
159 if (tx_done < budget) {
160 napi_complete(napi);
161 wil6210_unmask_irq_tx(wil);
162 wil_dbg_txrx(wil, "NAPI TX complete\n");
163 }
164
165 wil_dbg_txrx(wil, "NAPI TX poll(%d) done %d\n", budget, tx_done);
166
167 return min(tx_done, budget);
168 }
169
wil6210_netdev_poll_tx_edma(struct napi_struct * napi,int budget)170 static int wil6210_netdev_poll_tx_edma(struct napi_struct *napi, int budget)
171 {
172 struct wil6210_priv *wil = container_of(napi, struct wil6210_priv,
173 napi_tx);
174 int tx_done;
175 /* There is only one status TX ring */
176 struct wil_status_ring *sring = &wil->srings[wil->tx_sring_idx];
177
178 if (!sring->va)
179 return 0;
180
181 tx_done = wil_tx_sring_handler(wil, sring);
182
183 if (tx_done < budget) {
184 napi_complete(napi);
185 wil6210_unmask_irq_tx_edma(wil);
186 wil_dbg_txrx(wil, "NAPI TX complete\n");
187 }
188
189 wil_dbg_txrx(wil, "NAPI TX poll(%d) done %d\n", budget, tx_done);
190
191 return min(tx_done, budget);
192 }
193
wil_dev_setup(struct net_device * dev)194 static void wil_dev_setup(struct net_device *dev)
195 {
196 ether_setup(dev);
197 dev->max_mtu = mtu_max;
198 dev->tx_queue_len = WIL_TX_Q_LEN_DEFAULT;
199 }
200
wil_vif_deinit(struct wil6210_vif * vif)201 static void wil_vif_deinit(struct wil6210_vif *vif)
202 {
203 del_timer_sync(&vif->scan_timer);
204 del_timer_sync(&vif->p2p.discovery_timer);
205 cancel_work_sync(&vif->disconnect_worker);
206 cancel_work_sync(&vif->p2p.discovery_expired_work);
207 cancel_work_sync(&vif->p2p.delayed_listen_work);
208 wil_probe_client_flush(vif);
209 cancel_work_sync(&vif->probe_client_worker);
210 cancel_work_sync(&vif->enable_tx_key_worker);
211 }
212
wil_vif_free(struct wil6210_vif * vif)213 void wil_vif_free(struct wil6210_vif *vif)
214 {
215 struct net_device *ndev = vif_to_ndev(vif);
216
217 wil_vif_deinit(vif);
218 free_netdev(ndev);
219 }
220
wil_ndev_destructor(struct net_device * ndev)221 static void wil_ndev_destructor(struct net_device *ndev)
222 {
223 struct wil6210_vif *vif = ndev_to_vif(ndev);
224
225 wil_vif_deinit(vif);
226 }
227
wil_connect_timer_fn(struct timer_list * t)228 static void wil_connect_timer_fn(struct timer_list *t)
229 {
230 struct wil6210_vif *vif = from_timer(vif, t, connect_timer);
231 struct wil6210_priv *wil = vif_to_wil(vif);
232 bool q;
233
234 wil_err(wil, "Connect timeout detected, disconnect station\n");
235
236 /* reschedule to thread context - disconnect won't
237 * run from atomic context.
238 * queue on wmi_wq to prevent race with connect event.
239 */
240 q = queue_work(wil->wmi_wq, &vif->disconnect_worker);
241 wil_dbg_wmi(wil, "queue_work of disconnect_worker -> %d\n", q);
242 }
243
wil_scan_timer_fn(struct timer_list * t)244 static void wil_scan_timer_fn(struct timer_list *t)
245 {
246 struct wil6210_vif *vif = from_timer(vif, t, scan_timer);
247 struct wil6210_priv *wil = vif_to_wil(vif);
248
249 clear_bit(wil_status_fwready, wil->status);
250 wil_err(wil, "Scan timeout detected, start fw error recovery\n");
251 wil_fw_error_recovery(wil);
252 }
253
wil_p2p_discovery_timer_fn(struct timer_list * t)254 static void wil_p2p_discovery_timer_fn(struct timer_list *t)
255 {
256 struct wil6210_vif *vif = from_timer(vif, t, p2p.discovery_timer);
257 struct wil6210_priv *wil = vif_to_wil(vif);
258
259 wil_dbg_misc(wil, "p2p_discovery_timer_fn\n");
260
261 schedule_work(&vif->p2p.discovery_expired_work);
262 }
263
wil_vif_init(struct wil6210_vif * vif)264 static void wil_vif_init(struct wil6210_vif *vif)
265 {
266 vif->bcast_ring = -1;
267
268 mutex_init(&vif->probe_client_mutex);
269
270 timer_setup(&vif->connect_timer, wil_connect_timer_fn, 0);
271 timer_setup(&vif->scan_timer, wil_scan_timer_fn, 0);
272 timer_setup(&vif->p2p.discovery_timer, wil_p2p_discovery_timer_fn, 0);
273
274 INIT_WORK(&vif->probe_client_worker, wil_probe_client_worker);
275 INIT_WORK(&vif->disconnect_worker, wil_disconnect_worker);
276 INIT_WORK(&vif->p2p.discovery_expired_work, wil_p2p_listen_expired);
277 INIT_WORK(&vif->p2p.delayed_listen_work, wil_p2p_delayed_listen_work);
278 INIT_WORK(&vif->enable_tx_key_worker, wil_enable_tx_key_worker);
279
280 INIT_LIST_HEAD(&vif->probe_client_pending);
281
282 vif->net_queue_stopped = 1;
283 }
284
wil_vif_find_free_mid(struct wil6210_priv * wil)285 static u8 wil_vif_find_free_mid(struct wil6210_priv *wil)
286 {
287 u8 i;
288
289 for (i = 0; i < GET_MAX_VIFS(wil); i++) {
290 if (!wil->vifs[i])
291 return i;
292 }
293
294 return U8_MAX;
295 }
296
297 struct wil6210_vif *
wil_vif_alloc(struct wil6210_priv * wil,const char * name,unsigned char name_assign_type,enum nl80211_iftype iftype)298 wil_vif_alloc(struct wil6210_priv *wil, const char *name,
299 unsigned char name_assign_type, enum nl80211_iftype iftype)
300 {
301 struct net_device *ndev;
302 struct wireless_dev *wdev;
303 struct wil6210_vif *vif;
304 u8 mid;
305
306 mid = wil_vif_find_free_mid(wil);
307 if (mid == U8_MAX) {
308 wil_err(wil, "no available virtual interface\n");
309 return ERR_PTR(-EINVAL);
310 }
311
312 ndev = alloc_netdev(sizeof(*vif), name, name_assign_type,
313 wil_dev_setup);
314 if (!ndev) {
315 dev_err(wil_to_dev(wil), "alloc_netdev failed\n");
316 return ERR_PTR(-ENOMEM);
317 }
318 if (mid == 0) {
319 wil->main_ndev = ndev;
320 } else {
321 ndev->priv_destructor = wil_ndev_destructor;
322 ndev->needs_free_netdev = true;
323 }
324
325 vif = ndev_to_vif(ndev);
326 vif->ndev = ndev;
327 vif->wil = wil;
328 vif->mid = mid;
329 wil_vif_init(vif);
330
331 wdev = &vif->wdev;
332 wdev->wiphy = wil->wiphy;
333 wdev->iftype = iftype;
334
335 ndev->netdev_ops = &wil_netdev_ops;
336 wil_set_ethtoolops(ndev);
337 ndev->ieee80211_ptr = wdev;
338 ndev->hw_features = NETIF_F_HW_CSUM | NETIF_F_RXCSUM |
339 NETIF_F_SG | NETIF_F_GRO |
340 NETIF_F_TSO | NETIF_F_TSO6;
341
342 ndev->features |= ndev->hw_features;
343 SET_NETDEV_DEV(ndev, wiphy_dev(wdev->wiphy));
344 wdev->netdev = ndev;
345 return vif;
346 }
347
wil_if_alloc(struct device * dev)348 void *wil_if_alloc(struct device *dev)
349 {
350 struct wil6210_priv *wil;
351 struct wil6210_vif *vif;
352 int rc = 0;
353
354 wil = wil_cfg80211_init(dev);
355 if (IS_ERR(wil)) {
356 dev_err(dev, "wil_cfg80211_init failed\n");
357 return wil;
358 }
359
360 rc = wil_priv_init(wil);
361 if (rc) {
362 dev_err(dev, "wil_priv_init failed\n");
363 goto out_cfg;
364 }
365
366 wil_dbg_misc(wil, "if_alloc\n");
367
368 vif = wil_vif_alloc(wil, "wlan%d", NET_NAME_UNKNOWN,
369 NL80211_IFTYPE_STATION);
370 if (IS_ERR(vif)) {
371 dev_err(dev, "wil_vif_alloc failed\n");
372 rc = -ENOMEM;
373 goto out_priv;
374 }
375
376 wil->radio_wdev = vif_to_wdev(vif);
377
378 return wil;
379
380 out_priv:
381 wil_priv_deinit(wil);
382
383 out_cfg:
384 wil_cfg80211_deinit(wil);
385
386 return ERR_PTR(rc);
387 }
388
wil_if_free(struct wil6210_priv * wil)389 void wil_if_free(struct wil6210_priv *wil)
390 {
391 struct net_device *ndev = wil->main_ndev;
392
393 wil_dbg_misc(wil, "if_free\n");
394
395 if (!ndev)
396 return;
397
398 wil_priv_deinit(wil);
399
400 wil->main_ndev = NULL;
401 wil_ndev_destructor(ndev);
402 free_netdev(ndev);
403
404 wil_cfg80211_deinit(wil);
405 }
406
wil_vif_add(struct wil6210_priv * wil,struct wil6210_vif * vif)407 int wil_vif_add(struct wil6210_priv *wil, struct wil6210_vif *vif)
408 {
409 struct net_device *ndev = vif_to_ndev(vif);
410 struct wireless_dev *wdev = vif_to_wdev(vif);
411 bool any_active = wil_has_active_ifaces(wil, true, false);
412 int rc;
413
414 ASSERT_RTNL();
415
416 if (wil->vifs[vif->mid]) {
417 dev_err(&ndev->dev, "VIF with mid %d already in use\n",
418 vif->mid);
419 return -EEXIST;
420 }
421 if (any_active && vif->mid != 0) {
422 rc = wmi_port_allocate(wil, vif->mid, ndev->dev_addr,
423 wdev->iftype);
424 if (rc)
425 return rc;
426 }
427 rc = cfg80211_register_netdevice(ndev);
428 if (rc < 0) {
429 dev_err(&ndev->dev, "Failed to register netdev: %d\n", rc);
430 if (any_active && vif->mid != 0)
431 wmi_port_delete(wil, vif->mid);
432 return rc;
433 }
434
435 wil->vifs[vif->mid] = vif;
436 return 0;
437 }
438
wil_if_add(struct wil6210_priv * wil)439 int wil_if_add(struct wil6210_priv *wil)
440 {
441 struct wiphy *wiphy = wil->wiphy;
442 struct net_device *ndev = wil->main_ndev;
443 struct wil6210_vif *vif = ndev_to_vif(ndev);
444 int rc;
445
446 wil_dbg_misc(wil, "entered");
447
448 strscpy(wiphy->fw_version, wil->fw_version, sizeof(wiphy->fw_version));
449
450 rc = wiphy_register(wiphy);
451 if (rc < 0) {
452 wil_err(wil, "failed to register wiphy, err %d\n", rc);
453 return rc;
454 }
455
456 init_dummy_netdev(&wil->napi_ndev);
457 if (wil->use_enhanced_dma_hw) {
458 netif_napi_add(&wil->napi_ndev, &wil->napi_rx,
459 wil6210_netdev_poll_rx_edma);
460 netif_napi_add_tx(&wil->napi_ndev,
461 &wil->napi_tx, wil6210_netdev_poll_tx_edma);
462 } else {
463 netif_napi_add(&wil->napi_ndev, &wil->napi_rx,
464 wil6210_netdev_poll_rx);
465 netif_napi_add_tx(&wil->napi_ndev,
466 &wil->napi_tx, wil6210_netdev_poll_tx);
467 }
468
469 wil_update_net_queues_bh(wil, vif, NULL, true);
470
471 rtnl_lock();
472 wiphy_lock(wiphy);
473 rc = wil_vif_add(wil, vif);
474 wiphy_unlock(wiphy);
475 rtnl_unlock();
476 if (rc < 0)
477 goto out_wiphy;
478
479 return 0;
480
481 out_wiphy:
482 wiphy_unregister(wiphy);
483 return rc;
484 }
485
wil_vif_remove(struct wil6210_priv * wil,u8 mid)486 void wil_vif_remove(struct wil6210_priv *wil, u8 mid)
487 {
488 struct wil6210_vif *vif;
489 struct net_device *ndev;
490 bool any_active = wil_has_active_ifaces(wil, true, false);
491
492 ASSERT_RTNL();
493 if (mid >= GET_MAX_VIFS(wil)) {
494 wil_err(wil, "invalid MID: %d\n", mid);
495 return;
496 }
497
498 vif = wil->vifs[mid];
499 if (!vif) {
500 wil_err(wil, "MID %d not registered\n", mid);
501 return;
502 }
503
504 mutex_lock(&wil->mutex);
505 wil6210_disconnect(vif, NULL, WLAN_REASON_DEAUTH_LEAVING);
506 mutex_unlock(&wil->mutex);
507
508 ndev = vif_to_ndev(vif);
509 /* during unregister_netdevice cfg80211_leave may perform operations
510 * such as stop AP, disconnect, so we only clear the VIF afterwards
511 */
512 cfg80211_unregister_netdevice(ndev);
513
514 if (any_active && vif->mid != 0)
515 wmi_port_delete(wil, vif->mid);
516
517 /* make sure no one is accessing the VIF before removing */
518 mutex_lock(&wil->vif_mutex);
519 wil->vifs[mid] = NULL;
520 /* ensure NAPI code will see the NULL VIF */
521 wmb();
522 if (test_bit(wil_status_napi_en, wil->status)) {
523 napi_synchronize(&wil->napi_rx);
524 napi_synchronize(&wil->napi_tx);
525 }
526 mutex_unlock(&wil->vif_mutex);
527
528 flush_work(&wil->wmi_event_worker);
529 del_timer_sync(&vif->connect_timer);
530 cancel_work_sync(&vif->disconnect_worker);
531 wil_probe_client_flush(vif);
532 cancel_work_sync(&vif->probe_client_worker);
533 cancel_work_sync(&vif->enable_tx_key_worker);
534 /* for VIFs, ndev will be freed by destructor after RTNL is unlocked.
535 * the main interface will be freed in wil_if_free, we need to keep it
536 * a bit longer so logging macros will work.
537 */
538 }
539
wil_if_remove(struct wil6210_priv * wil)540 void wil_if_remove(struct wil6210_priv *wil)
541 {
542 struct net_device *ndev = wil->main_ndev;
543 struct wireless_dev *wdev = ndev->ieee80211_ptr;
544 struct wiphy *wiphy = wdev->wiphy;
545
546 wil_dbg_misc(wil, "if_remove\n");
547
548 rtnl_lock();
549 wiphy_lock(wiphy);
550 wil_vif_remove(wil, 0);
551 wiphy_unlock(wiphy);
552 rtnl_unlock();
553
554 netif_napi_del(&wil->napi_tx);
555 netif_napi_del(&wil->napi_rx);
556
557 wiphy_unregister(wiphy);
558 }
559