1 /*
2 * Copyright (c) 2012-2016 Qualcomm Atheros, Inc.
3 *
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17 #include <linux/moduleparam.h>
18 #include <linux/if_arp.h>
19 #include <linux/etherdevice.h>
20
21 #include "wil6210.h"
22 #include "txrx.h"
23 #include "wmi.h"
24 #include "boot_loader.h"
25
26 #define WAIT_FOR_HALP_VOTE_MS 100
27
28 bool debug_fw; /* = false; */
29 module_param(debug_fw, bool, S_IRUGO);
30 MODULE_PARM_DESC(debug_fw, " do not perform card reset. For FW debug");
31
32 static bool oob_mode;
33 module_param(oob_mode, bool, S_IRUGO);
34 MODULE_PARM_DESC(oob_mode,
35 " enable out of the box (OOB) mode in FW, for diagnostics and certification");
36
37 bool no_fw_recovery;
38 module_param(no_fw_recovery, bool, S_IRUGO | S_IWUSR);
39 MODULE_PARM_DESC(no_fw_recovery, " disable automatic FW error recovery");
40
41 /* if not set via modparam, will be set to default value of 1/8 of
42 * rx ring size during init flow
43 */
44 unsigned short rx_ring_overflow_thrsh = WIL6210_RX_HIGH_TRSH_INIT;
45 module_param(rx_ring_overflow_thrsh, ushort, S_IRUGO);
46 MODULE_PARM_DESC(rx_ring_overflow_thrsh,
47 " RX ring overflow threshold in descriptors.");
48
49 /* We allow allocation of more than 1 page buffers to support large packets.
50 * It is suboptimal behavior performance wise in case MTU above page size.
51 */
52 unsigned int mtu_max = TXRX_BUF_LEN_DEFAULT - WIL_MAX_MPDU_OVERHEAD;
mtu_max_set(const char * val,const struct kernel_param * kp)53 static int mtu_max_set(const char *val, const struct kernel_param *kp)
54 {
55 int ret;
56
57 /* sets mtu_max directly. no need to restore it in case of
58 * illegal value since we assume this will fail insmod
59 */
60 ret = param_set_uint(val, kp);
61 if (ret)
62 return ret;
63
64 if (mtu_max < 68 || mtu_max > WIL_MAX_ETH_MTU)
65 ret = -EINVAL;
66
67 return ret;
68 }
69
70 static const struct kernel_param_ops mtu_max_ops = {
71 .set = mtu_max_set,
72 .get = param_get_uint,
73 };
74
75 module_param_cb(mtu_max, &mtu_max_ops, &mtu_max, S_IRUGO);
76 MODULE_PARM_DESC(mtu_max, " Max MTU value.");
77
78 static uint rx_ring_order = WIL_RX_RING_SIZE_ORDER_DEFAULT;
79 static uint tx_ring_order = WIL_TX_RING_SIZE_ORDER_DEFAULT;
80 static uint bcast_ring_order = WIL_BCAST_RING_SIZE_ORDER_DEFAULT;
81
ring_order_set(const char * val,const struct kernel_param * kp)82 static int ring_order_set(const char *val, const struct kernel_param *kp)
83 {
84 int ret;
85 uint x;
86
87 ret = kstrtouint(val, 0, &x);
88 if (ret)
89 return ret;
90
91 if ((x < WIL_RING_SIZE_ORDER_MIN) || (x > WIL_RING_SIZE_ORDER_MAX))
92 return -EINVAL;
93
94 *((uint *)kp->arg) = x;
95
96 return 0;
97 }
98
99 static const struct kernel_param_ops ring_order_ops = {
100 .set = ring_order_set,
101 .get = param_get_uint,
102 };
103
104 module_param_cb(rx_ring_order, &ring_order_ops, &rx_ring_order, S_IRUGO);
105 MODULE_PARM_DESC(rx_ring_order, " Rx ring order; size = 1 << order");
106 module_param_cb(tx_ring_order, &ring_order_ops, &tx_ring_order, S_IRUGO);
107 MODULE_PARM_DESC(tx_ring_order, " Tx ring order; size = 1 << order");
108 module_param_cb(bcast_ring_order, &ring_order_ops, &bcast_ring_order, S_IRUGO);
109 MODULE_PARM_DESC(bcast_ring_order, " Bcast ring order; size = 1 << order");
110
111 #define RST_DELAY (20) /* msec, for loop in @wil_target_reset */
112 #define RST_COUNT (1 + 1000/RST_DELAY) /* round up to be above 1 sec total */
113
114 /*
115 * Due to a hardware issue,
116 * one has to read/write to/from NIC in 32-bit chunks;
117 * regular memcpy_fromio and siblings will
118 * not work on 64-bit platform - it uses 64-bit transactions
119 *
120 * Force 32-bit transactions to enable NIC on 64-bit platforms
121 *
122 * To avoid byte swap on big endian host, __raw_{read|write}l
123 * should be used - {read|write}l would swap bytes to provide
124 * little endian on PCI value in host endianness.
125 */
wil_memcpy_fromio_32(void * dst,const volatile void __iomem * src,size_t count)126 void wil_memcpy_fromio_32(void *dst, const volatile void __iomem *src,
127 size_t count)
128 {
129 u32 *d = dst;
130 const volatile u32 __iomem *s = src;
131
132 for (; count >= 4; count -= 4)
133 *d++ = __raw_readl(s++);
134
135 if (unlikely(count)) {
136 /* count can be 1..3 */
137 u32 tmp = __raw_readl(s);
138
139 memcpy(d, &tmp, count);
140 }
141 }
142
wil_memcpy_fromio_halp_vote(struct wil6210_priv * wil,void * dst,const volatile void __iomem * src,size_t count)143 void wil_memcpy_fromio_halp_vote(struct wil6210_priv *wil, void *dst,
144 const volatile void __iomem *src, size_t count)
145 {
146 wil_halp_vote(wil);
147 wil_memcpy_fromio_32(dst, src, count);
148 wil_halp_unvote(wil);
149 }
150
wil_memcpy_toio_32(volatile void __iomem * dst,const void * src,size_t count)151 void wil_memcpy_toio_32(volatile void __iomem *dst, const void *src,
152 size_t count)
153 {
154 volatile u32 __iomem *d = dst;
155 const u32 *s = src;
156
157 for (; count >= 4; count -= 4)
158 __raw_writel(*s++, d++);
159
160 if (unlikely(count)) {
161 /* count can be 1..3 */
162 u32 tmp = 0;
163
164 memcpy(&tmp, s, count);
165 __raw_writel(tmp, d);
166 }
167 }
168
wil_memcpy_toio_halp_vote(struct wil6210_priv * wil,volatile void __iomem * dst,const void * src,size_t count)169 void wil_memcpy_toio_halp_vote(struct wil6210_priv *wil,
170 volatile void __iomem *dst,
171 const void *src, size_t count)
172 {
173 wil_halp_vote(wil);
174 wil_memcpy_toio_32(dst, src, count);
175 wil_halp_unvote(wil);
176 }
177
wil_disconnect_cid(struct wil6210_priv * wil,int cid,u16 reason_code,bool from_event)178 static void wil_disconnect_cid(struct wil6210_priv *wil, int cid,
179 u16 reason_code, bool from_event)
180 __acquires(&sta->tid_rx_lock) __releases(&sta->tid_rx_lock)
181 {
182 uint i;
183 struct net_device *ndev = wil_to_ndev(wil);
184 struct wireless_dev *wdev = wil->wdev;
185 struct wil_sta_info *sta = &wil->sta[cid];
186
187 might_sleep();
188 wil_dbg_misc(wil, "%s(CID %d, status %d)\n", __func__, cid,
189 sta->status);
190 /* inform upper/lower layers */
191 if (sta->status != wil_sta_unused) {
192 if (!from_event)
193 wmi_disconnect_sta(wil, sta->addr, reason_code, true);
194
195 switch (wdev->iftype) {
196 case NL80211_IFTYPE_AP:
197 case NL80211_IFTYPE_P2P_GO:
198 /* AP-like interface */
199 cfg80211_del_sta(ndev, sta->addr, GFP_KERNEL);
200 break;
201 default:
202 break;
203 }
204 sta->status = wil_sta_unused;
205 }
206 /* reorder buffers */
207 for (i = 0; i < WIL_STA_TID_NUM; i++) {
208 struct wil_tid_ampdu_rx *r;
209
210 spin_lock_bh(&sta->tid_rx_lock);
211
212 r = sta->tid_rx[i];
213 sta->tid_rx[i] = NULL;
214 wil_tid_ampdu_rx_free(wil, r);
215
216 spin_unlock_bh(&sta->tid_rx_lock);
217 }
218 /* crypto context */
219 memset(sta->tid_crypto_rx, 0, sizeof(sta->tid_crypto_rx));
220 memset(&sta->group_crypto_rx, 0, sizeof(sta->group_crypto_rx));
221 /* release vrings */
222 for (i = 0; i < ARRAY_SIZE(wil->vring_tx); i++) {
223 if (wil->vring2cid_tid[i][0] == cid)
224 wil_vring_fini_tx(wil, i);
225 }
226 /* statistics */
227 memset(&sta->stats, 0, sizeof(sta->stats));
228 }
229
wil_ap_is_connected(struct wil6210_priv * wil)230 static bool wil_ap_is_connected(struct wil6210_priv *wil)
231 {
232 int i;
233
234 for (i = 0; i < ARRAY_SIZE(wil->sta); i++) {
235 if (wil->sta[i].status == wil_sta_connected)
236 return true;
237 }
238
239 return false;
240 }
241
_wil6210_disconnect(struct wil6210_priv * wil,const u8 * bssid,u16 reason_code,bool from_event)242 static void _wil6210_disconnect(struct wil6210_priv *wil, const u8 *bssid,
243 u16 reason_code, bool from_event)
244 {
245 int cid = -ENOENT;
246 struct net_device *ndev = wil_to_ndev(wil);
247 struct wireless_dev *wdev = wil->wdev;
248
249 if (unlikely(!ndev))
250 return;
251
252 might_sleep();
253 wil_info(wil, "%s(bssid=%pM, reason=%d, ev%s)\n", __func__, bssid,
254 reason_code, from_event ? "+" : "-");
255
256 /* Cases are:
257 * - disconnect single STA, still connected
258 * - disconnect single STA, already disconnected
259 * - disconnect all
260 *
261 * For "disconnect all", there are 3 options:
262 * - bssid == NULL
263 * - bssid is broadcast address (ff:ff:ff:ff:ff:ff)
264 * - bssid is our MAC address
265 */
266 if (bssid && !is_broadcast_ether_addr(bssid) &&
267 !ether_addr_equal_unaligned(ndev->dev_addr, bssid)) {
268 cid = wil_find_cid(wil, bssid);
269 wil_dbg_misc(wil, "Disconnect %pM, CID=%d, reason=%d\n",
270 bssid, cid, reason_code);
271 if (cid >= 0) /* disconnect 1 peer */
272 wil_disconnect_cid(wil, cid, reason_code, from_event);
273 } else { /* all */
274 wil_dbg_misc(wil, "Disconnect all\n");
275 for (cid = 0; cid < WIL6210_MAX_CID; cid++)
276 wil_disconnect_cid(wil, cid, reason_code, from_event);
277 }
278
279 /* link state */
280 switch (wdev->iftype) {
281 case NL80211_IFTYPE_STATION:
282 case NL80211_IFTYPE_P2P_CLIENT:
283 wil_bcast_fini(wil);
284 netif_tx_stop_all_queues(ndev);
285 netif_carrier_off(ndev);
286
287 if (test_bit(wil_status_fwconnected, wil->status)) {
288 clear_bit(wil_status_fwconnected, wil->status);
289 cfg80211_disconnected(ndev, reason_code,
290 NULL, 0, false, GFP_KERNEL);
291 } else if (test_bit(wil_status_fwconnecting, wil->status)) {
292 cfg80211_connect_result(ndev, bssid, NULL, 0, NULL, 0,
293 WLAN_STATUS_UNSPECIFIED_FAILURE,
294 GFP_KERNEL);
295 }
296 clear_bit(wil_status_fwconnecting, wil->status);
297 break;
298 case NL80211_IFTYPE_AP:
299 case NL80211_IFTYPE_P2P_GO:
300 if (!wil_ap_is_connected(wil))
301 clear_bit(wil_status_fwconnected, wil->status);
302 break;
303 default:
304 break;
305 }
306 }
307
wil_disconnect_worker(struct work_struct * work)308 static void wil_disconnect_worker(struct work_struct *work)
309 {
310 struct wil6210_priv *wil = container_of(work,
311 struct wil6210_priv, disconnect_worker);
312
313 mutex_lock(&wil->mutex);
314 _wil6210_disconnect(wil, NULL, WLAN_REASON_UNSPECIFIED, false);
315 mutex_unlock(&wil->mutex);
316 }
317
wil_connect_timer_fn(ulong x)318 static void wil_connect_timer_fn(ulong x)
319 {
320 struct wil6210_priv *wil = (void *)x;
321 bool q;
322
323 wil_err(wil, "Connect timeout detected, disconnect station\n");
324
325 /* reschedule to thread context - disconnect won't
326 * run from atomic context.
327 * queue on wmi_wq to prevent race with connect event.
328 */
329 q = queue_work(wil->wmi_wq, &wil->disconnect_worker);
330 wil_dbg_wmi(wil, "queue_work of disconnect_worker -> %d\n", q);
331 }
332
wil_scan_timer_fn(ulong x)333 static void wil_scan_timer_fn(ulong x)
334 {
335 struct wil6210_priv *wil = (void *)x;
336
337 clear_bit(wil_status_fwready, wil->status);
338 wil_err(wil, "Scan timeout detected, start fw error recovery\n");
339 wil_fw_error_recovery(wil);
340 }
341
wil_wait_for_recovery(struct wil6210_priv * wil)342 static int wil_wait_for_recovery(struct wil6210_priv *wil)
343 {
344 if (wait_event_interruptible(wil->wq, wil->recovery_state !=
345 fw_recovery_pending)) {
346 wil_err(wil, "Interrupt, canceling recovery\n");
347 return -ERESTARTSYS;
348 }
349 if (wil->recovery_state != fw_recovery_running) {
350 wil_info(wil, "Recovery cancelled\n");
351 return -EINTR;
352 }
353 wil_info(wil, "Proceed with recovery\n");
354 return 0;
355 }
356
wil_set_recovery_state(struct wil6210_priv * wil,int state)357 void wil_set_recovery_state(struct wil6210_priv *wil, int state)
358 {
359 wil_dbg_misc(wil, "%s(%d -> %d)\n", __func__,
360 wil->recovery_state, state);
361
362 wil->recovery_state = state;
363 wake_up_interruptible(&wil->wq);
364 }
365
wil_is_recovery_blocked(struct wil6210_priv * wil)366 bool wil_is_recovery_blocked(struct wil6210_priv *wil)
367 {
368 return no_fw_recovery && (wil->recovery_state == fw_recovery_pending);
369 }
370
wil_fw_error_worker(struct work_struct * work)371 static void wil_fw_error_worker(struct work_struct *work)
372 {
373 struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
374 fw_error_worker);
375 struct wireless_dev *wdev = wil->wdev;
376
377 wil_dbg_misc(wil, "fw error worker\n");
378
379 if (!netif_running(wil_to_ndev(wil))) {
380 wil_info(wil, "No recovery - interface is down\n");
381 return;
382 }
383
384 /* increment @recovery_count if less then WIL6210_FW_RECOVERY_TO
385 * passed since last recovery attempt
386 */
387 if (time_is_after_jiffies(wil->last_fw_recovery +
388 WIL6210_FW_RECOVERY_TO))
389 wil->recovery_count++;
390 else
391 wil->recovery_count = 1; /* fw was alive for a long time */
392
393 if (wil->recovery_count > WIL6210_FW_RECOVERY_RETRIES) {
394 wil_err(wil, "too many recovery attempts (%d), giving up\n",
395 wil->recovery_count);
396 return;
397 }
398
399 wil->last_fw_recovery = jiffies;
400
401 wil_info(wil, "fw error recovery requested (try %d)...\n",
402 wil->recovery_count);
403 if (!no_fw_recovery)
404 wil->recovery_state = fw_recovery_running;
405 if (wil_wait_for_recovery(wil) != 0)
406 return;
407
408 mutex_lock(&wil->mutex);
409 switch (wdev->iftype) {
410 case NL80211_IFTYPE_STATION:
411 case NL80211_IFTYPE_P2P_CLIENT:
412 case NL80211_IFTYPE_MONITOR:
413 /* silent recovery, upper layers will see disconnect */
414 __wil_down(wil);
415 __wil_up(wil);
416 break;
417 case NL80211_IFTYPE_AP:
418 case NL80211_IFTYPE_P2P_GO:
419 wil_info(wil, "No recovery for AP-like interface\n");
420 /* recovery in these modes is done by upper layers */
421 break;
422 default:
423 wil_err(wil, "No recovery - unknown interface type %d\n",
424 wdev->iftype);
425 break;
426 }
427 mutex_unlock(&wil->mutex);
428 }
429
wil_find_free_vring(struct wil6210_priv * wil)430 static int wil_find_free_vring(struct wil6210_priv *wil)
431 {
432 int i;
433
434 for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
435 if (!wil->vring_tx[i].va)
436 return i;
437 }
438 return -EINVAL;
439 }
440
wil_tx_init(struct wil6210_priv * wil,int cid)441 int wil_tx_init(struct wil6210_priv *wil, int cid)
442 {
443 int rc = -EINVAL, ringid;
444
445 if (cid < 0) {
446 wil_err(wil, "No connection pending\n");
447 goto out;
448 }
449 ringid = wil_find_free_vring(wil);
450 if (ringid < 0) {
451 wil_err(wil, "No free vring found\n");
452 goto out;
453 }
454
455 wil_dbg_wmi(wil, "Configure for connection CID %d vring %d\n",
456 cid, ringid);
457
458 rc = wil_vring_init_tx(wil, ringid, 1 << tx_ring_order, cid, 0);
459 if (rc)
460 wil_err(wil, "wil_vring_init_tx for CID %d vring %d failed\n",
461 cid, ringid);
462
463 out:
464 return rc;
465 }
466
wil_bcast_init(struct wil6210_priv * wil)467 int wil_bcast_init(struct wil6210_priv *wil)
468 {
469 int ri = wil->bcast_vring, rc;
470
471 if ((ri >= 0) && wil->vring_tx[ri].va)
472 return 0;
473
474 ri = wil_find_free_vring(wil);
475 if (ri < 0)
476 return ri;
477
478 wil->bcast_vring = ri;
479 rc = wil_vring_init_bcast(wil, ri, 1 << bcast_ring_order);
480 if (rc)
481 wil->bcast_vring = -1;
482
483 return rc;
484 }
485
wil_bcast_fini(struct wil6210_priv * wil)486 void wil_bcast_fini(struct wil6210_priv *wil)
487 {
488 int ri = wil->bcast_vring;
489
490 if (ri < 0)
491 return;
492
493 wil->bcast_vring = -1;
494 wil_vring_fini_tx(wil, ri);
495 }
496
wil_priv_init(struct wil6210_priv * wil)497 int wil_priv_init(struct wil6210_priv *wil)
498 {
499 uint i;
500
501 wil_dbg_misc(wil, "%s()\n", __func__);
502
503 memset(wil->sta, 0, sizeof(wil->sta));
504 for (i = 0; i < WIL6210_MAX_CID; i++)
505 spin_lock_init(&wil->sta[i].tid_rx_lock);
506
507 for (i = 0; i < WIL6210_MAX_TX_RINGS; i++)
508 spin_lock_init(&wil->vring_tx_data[i].lock);
509
510 mutex_init(&wil->mutex);
511 mutex_init(&wil->wmi_mutex);
512 mutex_init(&wil->probe_client_mutex);
513 mutex_init(&wil->p2p_wdev_mutex);
514 mutex_init(&wil->halp.lock);
515
516 init_completion(&wil->wmi_ready);
517 init_completion(&wil->wmi_call);
518 init_completion(&wil->halp.comp);
519
520 wil->bcast_vring = -1;
521 setup_timer(&wil->connect_timer, wil_connect_timer_fn, (ulong)wil);
522 setup_timer(&wil->scan_timer, wil_scan_timer_fn, (ulong)wil);
523 setup_timer(&wil->p2p.discovery_timer, wil_p2p_discovery_timer_fn,
524 (ulong)wil);
525
526 INIT_WORK(&wil->disconnect_worker, wil_disconnect_worker);
527 INIT_WORK(&wil->wmi_event_worker, wmi_event_worker);
528 INIT_WORK(&wil->fw_error_worker, wil_fw_error_worker);
529 INIT_WORK(&wil->probe_client_worker, wil_probe_client_worker);
530
531 INIT_LIST_HEAD(&wil->pending_wmi_ev);
532 INIT_LIST_HEAD(&wil->probe_client_pending);
533 spin_lock_init(&wil->wmi_ev_lock);
534 init_waitqueue_head(&wil->wq);
535
536 wil->wmi_wq = create_singlethread_workqueue(WIL_NAME "_wmi");
537 if (!wil->wmi_wq)
538 return -EAGAIN;
539
540 wil->wq_service = create_singlethread_workqueue(WIL_NAME "_service");
541 if (!wil->wq_service)
542 goto out_wmi_wq;
543
544 wil->last_fw_recovery = jiffies;
545 wil->tx_interframe_timeout = WIL6210_ITR_TX_INTERFRAME_TIMEOUT_DEFAULT;
546 wil->rx_interframe_timeout = WIL6210_ITR_RX_INTERFRAME_TIMEOUT_DEFAULT;
547 wil->tx_max_burst_duration = WIL6210_ITR_TX_MAX_BURST_DURATION_DEFAULT;
548 wil->rx_max_burst_duration = WIL6210_ITR_RX_MAX_BURST_DURATION_DEFAULT;
549
550 if (rx_ring_overflow_thrsh == WIL6210_RX_HIGH_TRSH_INIT)
551 rx_ring_overflow_thrsh = WIL6210_RX_HIGH_TRSH_DEFAULT;
552 return 0;
553
554 out_wmi_wq:
555 destroy_workqueue(wil->wmi_wq);
556
557 return -EAGAIN;
558 }
559
560 /**
561 * wil6210_disconnect - disconnect one connection
562 * @wil: driver context
563 * @bssid: peer to disconnect, NULL to disconnect all
564 * @reason_code: Reason code for the Disassociation frame
565 * @from_event: whether is invoked from FW event handler
566 *
567 * Disconnect and release associated resources. If invoked not from the
568 * FW event handler, issue WMI command(s) to trigger MAC disconnect.
569 */
wil6210_disconnect(struct wil6210_priv * wil,const u8 * bssid,u16 reason_code,bool from_event)570 void wil6210_disconnect(struct wil6210_priv *wil, const u8 *bssid,
571 u16 reason_code, bool from_event)
572 {
573 wil_dbg_misc(wil, "%s()\n", __func__);
574
575 del_timer_sync(&wil->connect_timer);
576 _wil6210_disconnect(wil, bssid, reason_code, from_event);
577 }
578
wil_priv_deinit(struct wil6210_priv * wil)579 void wil_priv_deinit(struct wil6210_priv *wil)
580 {
581 wil_dbg_misc(wil, "%s()\n", __func__);
582
583 wil_set_recovery_state(wil, fw_recovery_idle);
584 del_timer_sync(&wil->scan_timer);
585 del_timer_sync(&wil->p2p.discovery_timer);
586 cancel_work_sync(&wil->disconnect_worker);
587 cancel_work_sync(&wil->fw_error_worker);
588 cancel_work_sync(&wil->p2p.discovery_expired_work);
589 mutex_lock(&wil->mutex);
590 wil6210_disconnect(wil, NULL, WLAN_REASON_DEAUTH_LEAVING, false);
591 mutex_unlock(&wil->mutex);
592 wmi_event_flush(wil);
593 wil_probe_client_flush(wil);
594 cancel_work_sync(&wil->probe_client_worker);
595 destroy_workqueue(wil->wq_service);
596 destroy_workqueue(wil->wmi_wq);
597 }
598
wil_halt_cpu(struct wil6210_priv * wil)599 static inline void wil_halt_cpu(struct wil6210_priv *wil)
600 {
601 wil_w(wil, RGF_USER_USER_CPU_0, BIT_USER_USER_CPU_MAN_RST);
602 wil_w(wil, RGF_USER_MAC_CPU_0, BIT_USER_MAC_CPU_MAN_RST);
603 }
604
wil_release_cpu(struct wil6210_priv * wil)605 static inline void wil_release_cpu(struct wil6210_priv *wil)
606 {
607 /* Start CPU */
608 wil_w(wil, RGF_USER_USER_CPU_0, 1);
609 }
610
wil_set_oob_mode(struct wil6210_priv * wil,bool enable)611 static void wil_set_oob_mode(struct wil6210_priv *wil, bool enable)
612 {
613 wil_info(wil, "%s: enable=%d\n", __func__, enable);
614 if (enable)
615 wil_s(wil, RGF_USER_USAGE_6, BIT_USER_OOB_MODE);
616 else
617 wil_c(wil, RGF_USER_USAGE_6, BIT_USER_OOB_MODE);
618 }
619
wil_target_reset(struct wil6210_priv * wil)620 static int wil_target_reset(struct wil6210_priv *wil)
621 {
622 int delay = 0;
623 u32 x, x1 = 0;
624
625 wil_dbg_misc(wil, "Resetting \"%s\"...\n", wil->hw_name);
626
627 /* Clear MAC link up */
628 wil_s(wil, RGF_HP_CTRL, BIT(15));
629 wil_s(wil, RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT_HPAL_PERST_FROM_PAD);
630 wil_s(wil, RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT_CAR_PERST_RST);
631
632 wil_halt_cpu(wil);
633
634 /* clear all boot loader "ready" bits */
635 wil_w(wil, RGF_USER_BL +
636 offsetof(struct bl_dedicated_registers_v0, boot_loader_ready), 0);
637 /* Clear Fw Download notification */
638 wil_c(wil, RGF_USER_USAGE_6, BIT(0));
639
640 wil_s(wil, RGF_CAF_OSC_CONTROL, BIT_CAF_OSC_XTAL_EN);
641 /* XTAL stabilization should take about 3ms */
642 usleep_range(5000, 7000);
643 x = wil_r(wil, RGF_CAF_PLL_LOCK_STATUS);
644 if (!(x & BIT_CAF_OSC_DIG_XTAL_STABLE)) {
645 wil_err(wil, "Xtal stabilization timeout\n"
646 "RGF_CAF_PLL_LOCK_STATUS = 0x%08x\n", x);
647 return -ETIME;
648 }
649 /* switch 10k to XTAL*/
650 wil_c(wil, RGF_USER_SPARROW_M_4, BIT_SPARROW_M_4_SEL_SLEEP_OR_REF);
651 /* 40 MHz */
652 wil_c(wil, RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_CAR_AHB_SW_SEL);
653
654 wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x3ff81f);
655 wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_1, 0xf);
656
657 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0xFE000000);
658 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0x0000003F);
659 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x000000f0);
660 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0xFFE7FE00);
661
662 wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x0);
663 wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_1, 0x0);
664
665 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0);
666 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0);
667 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0);
668 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
669
670 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000003);
671 /* reset A2 PCIE AHB */
672 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00008000);
673
674 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
675
676 /* wait until device ready. typical time is 20..80 msec */
677 do {
678 msleep(RST_DELAY);
679 x = wil_r(wil, RGF_USER_BL +
680 offsetof(struct bl_dedicated_registers_v0,
681 boot_loader_ready));
682 if (x1 != x) {
683 wil_dbg_misc(wil, "BL.ready 0x%08x => 0x%08x\n", x1, x);
684 x1 = x;
685 }
686 if (delay++ > RST_COUNT) {
687 wil_err(wil, "Reset not completed, bl.ready 0x%08x\n",
688 x);
689 return -ETIME;
690 }
691 } while (x != BL_READY);
692
693 wil_c(wil, RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_RST_PWGD);
694
695 /* enable fix for HW bug related to the SA/DA swap in AP Rx */
696 wil_s(wil, RGF_DMA_OFUL_NID_0, BIT_DMA_OFUL_NID_0_RX_EXT_TR_EN |
697 BIT_DMA_OFUL_NID_0_RX_EXT_A3_SRC);
698
699 wil_dbg_misc(wil, "Reset completed in %d ms\n", delay * RST_DELAY);
700 return 0;
701 }
702
wil_mbox_ring_le2cpus(struct wil6210_mbox_ring * r)703 void wil_mbox_ring_le2cpus(struct wil6210_mbox_ring *r)
704 {
705 le32_to_cpus(&r->base);
706 le16_to_cpus(&r->entry_size);
707 le16_to_cpus(&r->size);
708 le32_to_cpus(&r->tail);
709 le32_to_cpus(&r->head);
710 }
711
wil_get_bl_info(struct wil6210_priv * wil)712 static int wil_get_bl_info(struct wil6210_priv *wil)
713 {
714 struct net_device *ndev = wil_to_ndev(wil);
715 struct wiphy *wiphy = wil_to_wiphy(wil);
716 union {
717 struct bl_dedicated_registers_v0 bl0;
718 struct bl_dedicated_registers_v1 bl1;
719 } bl;
720 u32 bl_ver;
721 u8 *mac;
722 u16 rf_status;
723
724 wil_memcpy_fromio_32(&bl, wil->csr + HOSTADDR(RGF_USER_BL),
725 sizeof(bl));
726 bl_ver = le32_to_cpu(bl.bl0.boot_loader_struct_version);
727 mac = bl.bl0.mac_address;
728
729 if (bl_ver == 0) {
730 le32_to_cpus(&bl.bl0.rf_type);
731 le32_to_cpus(&bl.bl0.baseband_type);
732 rf_status = 0; /* actually, unknown */
733 wil_info(wil,
734 "Boot Loader struct v%d: MAC = %pM RF = 0x%08x bband = 0x%08x\n",
735 bl_ver, mac,
736 bl.bl0.rf_type, bl.bl0.baseband_type);
737 wil_info(wil, "Boot Loader build unknown for struct v0\n");
738 } else {
739 le16_to_cpus(&bl.bl1.rf_type);
740 rf_status = le16_to_cpu(bl.bl1.rf_status);
741 le32_to_cpus(&bl.bl1.baseband_type);
742 le16_to_cpus(&bl.bl1.bl_version_subminor);
743 le16_to_cpus(&bl.bl1.bl_version_build);
744 wil_info(wil,
745 "Boot Loader struct v%d: MAC = %pM RF = 0x%04x (status 0x%04x) bband = 0x%08x\n",
746 bl_ver, mac,
747 bl.bl1.rf_type, rf_status,
748 bl.bl1.baseband_type);
749 wil_info(wil, "Boot Loader build %d.%d.%d.%d\n",
750 bl.bl1.bl_version_major, bl.bl1.bl_version_minor,
751 bl.bl1.bl_version_subminor, bl.bl1.bl_version_build);
752 }
753
754 if (!is_valid_ether_addr(mac)) {
755 wil_err(wil, "BL: Invalid MAC %pM\n", mac);
756 return -EINVAL;
757 }
758
759 ether_addr_copy(ndev->perm_addr, mac);
760 ether_addr_copy(wiphy->perm_addr, mac);
761 if (!is_valid_ether_addr(ndev->dev_addr))
762 ether_addr_copy(ndev->dev_addr, mac);
763
764 if (rf_status) {/* bad RF cable? */
765 wil_err(wil, "RF communication error 0x%04x",
766 rf_status);
767 return -EAGAIN;
768 }
769
770 return 0;
771 }
772
wil_bl_crash_info(struct wil6210_priv * wil,bool is_err)773 static void wil_bl_crash_info(struct wil6210_priv *wil, bool is_err)
774 {
775 u32 bl_assert_code, bl_assert_blink, bl_magic_number;
776 u32 bl_ver = wil_r(wil, RGF_USER_BL +
777 offsetof(struct bl_dedicated_registers_v0,
778 boot_loader_struct_version));
779
780 if (bl_ver < 2)
781 return;
782
783 bl_assert_code = wil_r(wil, RGF_USER_BL +
784 offsetof(struct bl_dedicated_registers_v1,
785 bl_assert_code));
786 bl_assert_blink = wil_r(wil, RGF_USER_BL +
787 offsetof(struct bl_dedicated_registers_v1,
788 bl_assert_blink));
789 bl_magic_number = wil_r(wil, RGF_USER_BL +
790 offsetof(struct bl_dedicated_registers_v1,
791 bl_magic_number));
792
793 if (is_err) {
794 wil_err(wil,
795 "BL assert code 0x%08x blink 0x%08x magic 0x%08x\n",
796 bl_assert_code, bl_assert_blink, bl_magic_number);
797 } else {
798 wil_dbg_misc(wil,
799 "BL assert code 0x%08x blink 0x%08x magic 0x%08x\n",
800 bl_assert_code, bl_assert_blink, bl_magic_number);
801 }
802 }
803
wil_wait_for_fw_ready(struct wil6210_priv * wil)804 static int wil_wait_for_fw_ready(struct wil6210_priv *wil)
805 {
806 ulong to = msecs_to_jiffies(1000);
807 ulong left = wait_for_completion_timeout(&wil->wmi_ready, to);
808
809 if (0 == left) {
810 wil_err(wil, "Firmware not ready\n");
811 return -ETIME;
812 } else {
813 wil_info(wil, "FW ready after %d ms. HW version 0x%08x\n",
814 jiffies_to_msecs(to-left), wil->hw_version);
815 }
816 return 0;
817 }
818
819 /*
820 * We reset all the structures, and we reset the UMAC.
821 * After calling this routine, you're expected to reload
822 * the firmware.
823 */
wil_reset(struct wil6210_priv * wil,bool load_fw)824 int wil_reset(struct wil6210_priv *wil, bool load_fw)
825 {
826 int rc;
827
828 wil_dbg_misc(wil, "%s()\n", __func__);
829
830 WARN_ON(!mutex_is_locked(&wil->mutex));
831 WARN_ON(test_bit(wil_status_napi_en, wil->status));
832
833 if (debug_fw) {
834 static const u8 mac[ETH_ALEN] = {
835 0x00, 0xde, 0xad, 0x12, 0x34, 0x56,
836 };
837 struct net_device *ndev = wil_to_ndev(wil);
838
839 ether_addr_copy(ndev->perm_addr, mac);
840 ether_addr_copy(ndev->dev_addr, ndev->perm_addr);
841 return 0;
842 }
843
844 if (wil->hw_version == HW_VER_UNKNOWN)
845 return -ENODEV;
846
847 if (wil->platform_ops.notify) {
848 rc = wil->platform_ops.notify(wil->platform_handle,
849 WIL_PLATFORM_EVT_PRE_RESET);
850 if (rc)
851 wil_err(wil,
852 "%s: PRE_RESET platform notify failed, rc %d\n",
853 __func__, rc);
854 }
855
856 set_bit(wil_status_resetting, wil->status);
857
858 cancel_work_sync(&wil->disconnect_worker);
859 wil6210_disconnect(wil, NULL, WLAN_REASON_DEAUTH_LEAVING, false);
860 wil_bcast_fini(wil);
861
862 /* Disable device led before reset*/
863 wmi_led_cfg(wil, false);
864
865 /* prevent NAPI from being scheduled and prevent wmi commands */
866 mutex_lock(&wil->wmi_mutex);
867 bitmap_zero(wil->status, wil_status_last);
868 mutex_unlock(&wil->wmi_mutex);
869
870 mutex_lock(&wil->p2p_wdev_mutex);
871 if (wil->scan_request) {
872 struct cfg80211_scan_info info = {
873 .aborted = true,
874 };
875
876 wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
877 wil->scan_request);
878 del_timer_sync(&wil->scan_timer);
879 cfg80211_scan_done(wil->scan_request, &info);
880 wil->scan_request = NULL;
881 }
882 mutex_unlock(&wil->p2p_wdev_mutex);
883
884 wil_mask_irq(wil);
885
886 wmi_event_flush(wil);
887
888 flush_workqueue(wil->wq_service);
889 flush_workqueue(wil->wmi_wq);
890
891 wil_bl_crash_info(wil, false);
892 rc = wil_target_reset(wil);
893 wil_rx_fini(wil);
894 if (rc) {
895 wil_bl_crash_info(wil, true);
896 return rc;
897 }
898
899 rc = wil_get_bl_info(wil);
900 if (rc == -EAGAIN && !load_fw) /* ignore RF error if not going up */
901 rc = 0;
902 if (rc)
903 return rc;
904
905 wil_set_oob_mode(wil, oob_mode);
906 if (load_fw) {
907 wil_info(wil, "Use firmware <%s> + board <%s>\n", WIL_FW_NAME,
908 WIL_FW2_NAME);
909
910 wil_halt_cpu(wil);
911 memset(wil->fw_version, 0, sizeof(wil->fw_version));
912 /* Loading f/w from the file */
913 rc = wil_request_firmware(wil, WIL_FW_NAME, true);
914 if (rc)
915 return rc;
916 rc = wil_request_firmware(wil, WIL_FW2_NAME, true);
917 if (rc)
918 return rc;
919
920 /* Mark FW as loaded from host */
921 wil_s(wil, RGF_USER_USAGE_6, 1);
922
923 /* clear any interrupts which on-card-firmware
924 * may have set
925 */
926 wil6210_clear_irq(wil);
927 /* CAF_ICR - clear and mask */
928 /* it is W1C, clear by writing back same value */
929 wil_s(wil, RGF_CAF_ICR + offsetof(struct RGF_ICR, ICR), 0);
930 wil_w(wil, RGF_CAF_ICR + offsetof(struct RGF_ICR, IMV), ~0);
931
932 wil_release_cpu(wil);
933 }
934
935 /* init after reset */
936 wil->ap_isolate = 0;
937 reinit_completion(&wil->wmi_ready);
938 reinit_completion(&wil->wmi_call);
939 reinit_completion(&wil->halp.comp);
940
941 if (load_fw) {
942 wil_configure_interrupt_moderation(wil);
943 wil_unmask_irq(wil);
944
945 /* we just started MAC, wait for FW ready */
946 rc = wil_wait_for_fw_ready(wil);
947 if (rc)
948 return rc;
949
950 /* check FW is responsive */
951 rc = wmi_echo(wil);
952 if (rc) {
953 wil_err(wil, "%s: wmi_echo failed, rc %d\n",
954 __func__, rc);
955 return rc;
956 }
957
958 if (wil->platform_ops.notify) {
959 rc = wil->platform_ops.notify(wil->platform_handle,
960 WIL_PLATFORM_EVT_FW_RDY);
961 if (rc) {
962 wil_err(wil,
963 "%s: FW_RDY notify failed, rc %d\n",
964 __func__, rc);
965 rc = 0;
966 }
967 }
968 }
969
970 return rc;
971 }
972
wil_fw_error_recovery(struct wil6210_priv * wil)973 void wil_fw_error_recovery(struct wil6210_priv *wil)
974 {
975 wil_dbg_misc(wil, "starting fw error recovery\n");
976
977 if (test_bit(wil_status_resetting, wil->status)) {
978 wil_info(wil, "Reset already in progress\n");
979 return;
980 }
981
982 wil->recovery_state = fw_recovery_pending;
983 schedule_work(&wil->fw_error_worker);
984 }
985
__wil_up(struct wil6210_priv * wil)986 int __wil_up(struct wil6210_priv *wil)
987 {
988 struct net_device *ndev = wil_to_ndev(wil);
989 struct wireless_dev *wdev = wil->wdev;
990 int rc;
991
992 WARN_ON(!mutex_is_locked(&wil->mutex));
993
994 rc = wil_reset(wil, true);
995 if (rc)
996 return rc;
997
998 /* Rx VRING. After MAC and beacon */
999 rc = wil_rx_init(wil, 1 << rx_ring_order);
1000 if (rc)
1001 return rc;
1002
1003 switch (wdev->iftype) {
1004 case NL80211_IFTYPE_STATION:
1005 wil_dbg_misc(wil, "type: STATION\n");
1006 ndev->type = ARPHRD_ETHER;
1007 break;
1008 case NL80211_IFTYPE_AP:
1009 wil_dbg_misc(wil, "type: AP\n");
1010 ndev->type = ARPHRD_ETHER;
1011 break;
1012 case NL80211_IFTYPE_P2P_CLIENT:
1013 wil_dbg_misc(wil, "type: P2P_CLIENT\n");
1014 ndev->type = ARPHRD_ETHER;
1015 break;
1016 case NL80211_IFTYPE_P2P_GO:
1017 wil_dbg_misc(wil, "type: P2P_GO\n");
1018 ndev->type = ARPHRD_ETHER;
1019 break;
1020 case NL80211_IFTYPE_MONITOR:
1021 wil_dbg_misc(wil, "type: Monitor\n");
1022 ndev->type = ARPHRD_IEEE80211_RADIOTAP;
1023 /* ARPHRD_IEEE80211 or ARPHRD_IEEE80211_RADIOTAP ? */
1024 break;
1025 default:
1026 return -EOPNOTSUPP;
1027 }
1028
1029 /* MAC address - pre-requisite for other commands */
1030 wmi_set_mac_address(wil, ndev->dev_addr);
1031
1032 wil_dbg_misc(wil, "NAPI enable\n");
1033 napi_enable(&wil->napi_rx);
1034 napi_enable(&wil->napi_tx);
1035 set_bit(wil_status_napi_en, wil->status);
1036
1037 if (wil->platform_ops.bus_request)
1038 wil->platform_ops.bus_request(wil->platform_handle,
1039 WIL_MAX_BUS_REQUEST_KBPS);
1040
1041 return 0;
1042 }
1043
wil_up(struct wil6210_priv * wil)1044 int wil_up(struct wil6210_priv *wil)
1045 {
1046 int rc;
1047
1048 wil_dbg_misc(wil, "%s()\n", __func__);
1049
1050 mutex_lock(&wil->mutex);
1051 rc = __wil_up(wil);
1052 mutex_unlock(&wil->mutex);
1053
1054 return rc;
1055 }
1056
__wil_down(struct wil6210_priv * wil)1057 int __wil_down(struct wil6210_priv *wil)
1058 {
1059 WARN_ON(!mutex_is_locked(&wil->mutex));
1060
1061 set_bit(wil_status_resetting, wil->status);
1062
1063 if (wil->platform_ops.bus_request)
1064 wil->platform_ops.bus_request(wil->platform_handle, 0);
1065
1066 wil_disable_irq(wil);
1067 if (test_and_clear_bit(wil_status_napi_en, wil->status)) {
1068 napi_disable(&wil->napi_rx);
1069 napi_disable(&wil->napi_tx);
1070 wil_dbg_misc(wil, "NAPI disable\n");
1071 }
1072 wil_enable_irq(wil);
1073
1074 wil_p2p_stop_radio_operations(wil);
1075
1076 mutex_lock(&wil->p2p_wdev_mutex);
1077 if (wil->scan_request) {
1078 struct cfg80211_scan_info info = {
1079 .aborted = true,
1080 };
1081
1082 wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
1083 wil->scan_request);
1084 del_timer_sync(&wil->scan_timer);
1085 cfg80211_scan_done(wil->scan_request, &info);
1086 wil->scan_request = NULL;
1087 }
1088 mutex_unlock(&wil->p2p_wdev_mutex);
1089
1090 wil_reset(wil, false);
1091
1092 return 0;
1093 }
1094
wil_down(struct wil6210_priv * wil)1095 int wil_down(struct wil6210_priv *wil)
1096 {
1097 int rc;
1098
1099 wil_dbg_misc(wil, "%s()\n", __func__);
1100
1101 wil_set_recovery_state(wil, fw_recovery_idle);
1102 mutex_lock(&wil->mutex);
1103 rc = __wil_down(wil);
1104 mutex_unlock(&wil->mutex);
1105
1106 return rc;
1107 }
1108
wil_find_cid(struct wil6210_priv * wil,const u8 * mac)1109 int wil_find_cid(struct wil6210_priv *wil, const u8 *mac)
1110 {
1111 int i;
1112 int rc = -ENOENT;
1113
1114 for (i = 0; i < ARRAY_SIZE(wil->sta); i++) {
1115 if ((wil->sta[i].status != wil_sta_unused) &&
1116 ether_addr_equal(wil->sta[i].addr, mac)) {
1117 rc = i;
1118 break;
1119 }
1120 }
1121
1122 return rc;
1123 }
1124
wil_halp_vote(struct wil6210_priv * wil)1125 void wil_halp_vote(struct wil6210_priv *wil)
1126 {
1127 unsigned long rc;
1128 unsigned long to_jiffies = msecs_to_jiffies(WAIT_FOR_HALP_VOTE_MS);
1129
1130 mutex_lock(&wil->halp.lock);
1131
1132 wil_dbg_irq(wil, "%s: start, HALP ref_cnt (%d)\n", __func__,
1133 wil->halp.ref_cnt);
1134
1135 if (++wil->halp.ref_cnt == 1) {
1136 wil6210_set_halp(wil);
1137 rc = wait_for_completion_timeout(&wil->halp.comp, to_jiffies);
1138 if (!rc) {
1139 wil_err(wil, "%s: HALP vote timed out\n", __func__);
1140 /* Mask HALP as done in case the interrupt is raised */
1141 wil6210_mask_halp(wil);
1142 } else {
1143 wil_dbg_irq(wil,
1144 "%s: HALP vote completed after %d ms\n",
1145 __func__,
1146 jiffies_to_msecs(to_jiffies - rc));
1147 }
1148 }
1149
1150 wil_dbg_irq(wil, "%s: end, HALP ref_cnt (%d)\n", __func__,
1151 wil->halp.ref_cnt);
1152
1153 mutex_unlock(&wil->halp.lock);
1154 }
1155
wil_halp_unvote(struct wil6210_priv * wil)1156 void wil_halp_unvote(struct wil6210_priv *wil)
1157 {
1158 WARN_ON(wil->halp.ref_cnt == 0);
1159
1160 mutex_lock(&wil->halp.lock);
1161
1162 wil_dbg_irq(wil, "%s: start, HALP ref_cnt (%d)\n", __func__,
1163 wil->halp.ref_cnt);
1164
1165 if (--wil->halp.ref_cnt == 0) {
1166 wil6210_clear_halp(wil);
1167 wil_dbg_irq(wil, "%s: HALP unvote\n", __func__);
1168 }
1169
1170 wil_dbg_irq(wil, "%s: end, HALP ref_cnt (%d)\n", __func__,
1171 wil->halp.ref_cnt);
1172
1173 mutex_unlock(&wil->halp.lock);
1174 }
1175