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Merge ath-next from ath.git
[deliverable/linux.git] / drivers / net / wireless / ath / wil6210 / main.c
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;
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
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 */
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 /* size_t is unsigned, if (count%4 != 0) it will wrap */
133 for (count += 4; count > 4; count -= 4)
134 *d++ = __raw_readl(s++);
135 }
136
137 void wil_memcpy_fromio_halp_vote(struct wil6210_priv *wil, void *dst,
138 const volatile void __iomem *src, size_t count)
139 {
140 wil_halp_vote(wil);
141 wil_memcpy_fromio_32(dst, src, count);
142 wil_halp_unvote(wil);
143 }
144
145 void wil_memcpy_toio_32(volatile void __iomem *dst, const void *src,
146 size_t count)
147 {
148 volatile u32 __iomem *d = dst;
149 const u32 *s = src;
150
151 for (count += 4; count > 4; count -= 4)
152 __raw_writel(*s++, d++);
153 }
154
155 void wil_memcpy_toio_halp_vote(struct wil6210_priv *wil,
156 volatile void __iomem *dst,
157 const void *src, size_t count)
158 {
159 wil_halp_vote(wil);
160 wil_memcpy_toio_32(dst, src, count);
161 wil_halp_unvote(wil);
162 }
163
164 static void wil_disconnect_cid(struct wil6210_priv *wil, int cid,
165 u16 reason_code, bool from_event)
166 __acquires(&sta->tid_rx_lock) __releases(&sta->tid_rx_lock)
167 {
168 uint i;
169 struct net_device *ndev = wil_to_ndev(wil);
170 struct wireless_dev *wdev = wil->wdev;
171 struct wil_sta_info *sta = &wil->sta[cid];
172
173 might_sleep();
174 wil_dbg_misc(wil, "%s(CID %d, status %d)\n", __func__, cid,
175 sta->status);
176 /* inform upper/lower layers */
177 if (sta->status != wil_sta_unused) {
178 if (!from_event)
179 wmi_disconnect_sta(wil, sta->addr, reason_code, true);
180
181 switch (wdev->iftype) {
182 case NL80211_IFTYPE_AP:
183 case NL80211_IFTYPE_P2P_GO:
184 /* AP-like interface */
185 cfg80211_del_sta(ndev, sta->addr, GFP_KERNEL);
186 break;
187 default:
188 break;
189 }
190 sta->status = wil_sta_unused;
191 }
192 /* reorder buffers */
193 for (i = 0; i < WIL_STA_TID_NUM; i++) {
194 struct wil_tid_ampdu_rx *r;
195
196 spin_lock_bh(&sta->tid_rx_lock);
197
198 r = sta->tid_rx[i];
199 sta->tid_rx[i] = NULL;
200 wil_tid_ampdu_rx_free(wil, r);
201
202 spin_unlock_bh(&sta->tid_rx_lock);
203 }
204 /* crypto context */
205 memset(sta->tid_crypto_rx, 0, sizeof(sta->tid_crypto_rx));
206 memset(&sta->group_crypto_rx, 0, sizeof(sta->group_crypto_rx));
207 /* release vrings */
208 for (i = 0; i < ARRAY_SIZE(wil->vring_tx); i++) {
209 if (wil->vring2cid_tid[i][0] == cid)
210 wil_vring_fini_tx(wil, i);
211 }
212 /* statistics */
213 memset(&sta->stats, 0, sizeof(sta->stats));
214 }
215
216 static bool wil_ap_is_connected(struct wil6210_priv *wil)
217 {
218 int i;
219
220 for (i = 0; i < ARRAY_SIZE(wil->sta); i++) {
221 if (wil->sta[i].status == wil_sta_connected)
222 return true;
223 }
224
225 return false;
226 }
227
228 static void _wil6210_disconnect(struct wil6210_priv *wil, const u8 *bssid,
229 u16 reason_code, bool from_event)
230 {
231 int cid = -ENOENT;
232 struct net_device *ndev = wil_to_ndev(wil);
233 struct wireless_dev *wdev = wil->wdev;
234
235 might_sleep();
236 wil_info(wil, "%s(bssid=%pM, reason=%d, ev%s)\n", __func__, bssid,
237 reason_code, from_event ? "+" : "-");
238
239 /* Cases are:
240 * - disconnect single STA, still connected
241 * - disconnect single STA, already disconnected
242 * - disconnect all
243 *
244 * For "disconnect all", there are 3 options:
245 * - bssid == NULL
246 * - bssid is broadcast address (ff:ff:ff:ff:ff:ff)
247 * - bssid is our MAC address
248 */
249 if (bssid && !is_broadcast_ether_addr(bssid) &&
250 !ether_addr_equal_unaligned(ndev->dev_addr, bssid)) {
251 cid = wil_find_cid(wil, bssid);
252 wil_dbg_misc(wil, "Disconnect %pM, CID=%d, reason=%d\n",
253 bssid, cid, reason_code);
254 if (cid >= 0) /* disconnect 1 peer */
255 wil_disconnect_cid(wil, cid, reason_code, from_event);
256 } else { /* all */
257 wil_dbg_misc(wil, "Disconnect all\n");
258 for (cid = 0; cid < WIL6210_MAX_CID; cid++)
259 wil_disconnect_cid(wil, cid, reason_code, from_event);
260 }
261
262 /* link state */
263 switch (wdev->iftype) {
264 case NL80211_IFTYPE_STATION:
265 case NL80211_IFTYPE_P2P_CLIENT:
266 wil_bcast_fini(wil);
267 netif_tx_stop_all_queues(ndev);
268 netif_carrier_off(ndev);
269
270 if (test_bit(wil_status_fwconnected, wil->status)) {
271 clear_bit(wil_status_fwconnected, wil->status);
272 cfg80211_disconnected(ndev, reason_code,
273 NULL, 0, false, GFP_KERNEL);
274 } else if (test_bit(wil_status_fwconnecting, wil->status)) {
275 cfg80211_connect_result(ndev, bssid, NULL, 0, NULL, 0,
276 WLAN_STATUS_UNSPECIFIED_FAILURE,
277 GFP_KERNEL);
278 }
279 clear_bit(wil_status_fwconnecting, wil->status);
280 break;
281 case NL80211_IFTYPE_AP:
282 case NL80211_IFTYPE_P2P_GO:
283 if (!wil_ap_is_connected(wil))
284 clear_bit(wil_status_fwconnected, wil->status);
285 break;
286 default:
287 break;
288 }
289 }
290
291 static void wil_disconnect_worker(struct work_struct *work)
292 {
293 struct wil6210_priv *wil = container_of(work,
294 struct wil6210_priv, disconnect_worker);
295
296 mutex_lock(&wil->mutex);
297 _wil6210_disconnect(wil, NULL, WLAN_REASON_UNSPECIFIED, false);
298 mutex_unlock(&wil->mutex);
299 }
300
301 static void wil_connect_timer_fn(ulong x)
302 {
303 struct wil6210_priv *wil = (void *)x;
304 bool q;
305
306 wil_err(wil, "Connect timeout detected, disconnect station\n");
307
308 /* reschedule to thread context - disconnect won't
309 * run from atomic context.
310 * queue on wmi_wq to prevent race with connect event.
311 */
312 q = queue_work(wil->wmi_wq, &wil->disconnect_worker);
313 wil_dbg_wmi(wil, "queue_work of disconnect_worker -> %d\n", q);
314 }
315
316 static void wil_scan_timer_fn(ulong x)
317 {
318 struct wil6210_priv *wil = (void *)x;
319
320 clear_bit(wil_status_fwready, wil->status);
321 wil_err(wil, "Scan timeout detected, start fw error recovery\n");
322 wil_fw_error_recovery(wil);
323 }
324
325 static int wil_wait_for_recovery(struct wil6210_priv *wil)
326 {
327 if (wait_event_interruptible(wil->wq, wil->recovery_state !=
328 fw_recovery_pending)) {
329 wil_err(wil, "Interrupt, canceling recovery\n");
330 return -ERESTARTSYS;
331 }
332 if (wil->recovery_state != fw_recovery_running) {
333 wil_info(wil, "Recovery cancelled\n");
334 return -EINTR;
335 }
336 wil_info(wil, "Proceed with recovery\n");
337 return 0;
338 }
339
340 void wil_set_recovery_state(struct wil6210_priv *wil, int state)
341 {
342 wil_dbg_misc(wil, "%s(%d -> %d)\n", __func__,
343 wil->recovery_state, state);
344
345 wil->recovery_state = state;
346 wake_up_interruptible(&wil->wq);
347 }
348
349 bool wil_is_recovery_blocked(struct wil6210_priv *wil)
350 {
351 return no_fw_recovery && (wil->recovery_state == fw_recovery_pending);
352 }
353
354 static void wil_fw_error_worker(struct work_struct *work)
355 {
356 struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
357 fw_error_worker);
358 struct wireless_dev *wdev = wil->wdev;
359
360 wil_dbg_misc(wil, "fw error worker\n");
361
362 if (!netif_running(wil_to_ndev(wil))) {
363 wil_info(wil, "No recovery - interface is down\n");
364 return;
365 }
366
367 /* increment @recovery_count if less then WIL6210_FW_RECOVERY_TO
368 * passed since last recovery attempt
369 */
370 if (time_is_after_jiffies(wil->last_fw_recovery +
371 WIL6210_FW_RECOVERY_TO))
372 wil->recovery_count++;
373 else
374 wil->recovery_count = 1; /* fw was alive for a long time */
375
376 if (wil->recovery_count > WIL6210_FW_RECOVERY_RETRIES) {
377 wil_err(wil, "too many recovery attempts (%d), giving up\n",
378 wil->recovery_count);
379 return;
380 }
381
382 wil->last_fw_recovery = jiffies;
383
384 mutex_lock(&wil->mutex);
385 switch (wdev->iftype) {
386 case NL80211_IFTYPE_STATION:
387 case NL80211_IFTYPE_P2P_CLIENT:
388 case NL80211_IFTYPE_MONITOR:
389 wil_info(wil, "fw error recovery requested (try %d)...\n",
390 wil->recovery_count);
391 if (!no_fw_recovery)
392 wil->recovery_state = fw_recovery_running;
393 if (0 != wil_wait_for_recovery(wil))
394 break;
395
396 __wil_down(wil);
397 __wil_up(wil);
398 break;
399 case NL80211_IFTYPE_AP:
400 case NL80211_IFTYPE_P2P_GO:
401 wil_info(wil, "No recovery for AP-like interface\n");
402 /* recovery in these modes is done by upper layers */
403 break;
404 default:
405 wil_err(wil, "No recovery - unknown interface type %d\n",
406 wdev->iftype);
407 break;
408 }
409 mutex_unlock(&wil->mutex);
410 }
411
412 static int wil_find_free_vring(struct wil6210_priv *wil)
413 {
414 int i;
415
416 for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
417 if (!wil->vring_tx[i].va)
418 return i;
419 }
420 return -EINVAL;
421 }
422
423 int wil_tx_init(struct wil6210_priv *wil, int cid)
424 {
425 int rc = -EINVAL, ringid;
426
427 if (cid < 0) {
428 wil_err(wil, "No connection pending\n");
429 goto out;
430 }
431 ringid = wil_find_free_vring(wil);
432 if (ringid < 0) {
433 wil_err(wil, "No free vring found\n");
434 goto out;
435 }
436
437 wil_dbg_wmi(wil, "Configure for connection CID %d vring %d\n",
438 cid, ringid);
439
440 rc = wil_vring_init_tx(wil, ringid, 1 << tx_ring_order, cid, 0);
441 if (rc)
442 wil_err(wil, "wil_vring_init_tx for CID %d vring %d failed\n",
443 cid, ringid);
444
445 out:
446 return rc;
447 }
448
449 int wil_bcast_init(struct wil6210_priv *wil)
450 {
451 int ri = wil->bcast_vring, rc;
452
453 if ((ri >= 0) && wil->vring_tx[ri].va)
454 return 0;
455
456 ri = wil_find_free_vring(wil);
457 if (ri < 0)
458 return ri;
459
460 wil->bcast_vring = ri;
461 rc = wil_vring_init_bcast(wil, ri, 1 << bcast_ring_order);
462 if (rc)
463 wil->bcast_vring = -1;
464
465 return rc;
466 }
467
468 void wil_bcast_fini(struct wil6210_priv *wil)
469 {
470 int ri = wil->bcast_vring;
471
472 if (ri < 0)
473 return;
474
475 wil->bcast_vring = -1;
476 wil_vring_fini_tx(wil, ri);
477 }
478
479 int wil_priv_init(struct wil6210_priv *wil)
480 {
481 uint i;
482
483 wil_dbg_misc(wil, "%s()\n", __func__);
484
485 memset(wil->sta, 0, sizeof(wil->sta));
486 for (i = 0; i < WIL6210_MAX_CID; i++)
487 spin_lock_init(&wil->sta[i].tid_rx_lock);
488
489 for (i = 0; i < WIL6210_MAX_TX_RINGS; i++)
490 spin_lock_init(&wil->vring_tx_data[i].lock);
491
492 mutex_init(&wil->mutex);
493 mutex_init(&wil->wmi_mutex);
494 mutex_init(&wil->probe_client_mutex);
495 mutex_init(&wil->p2p_wdev_mutex);
496 mutex_init(&wil->halp.lock);
497
498 init_completion(&wil->wmi_ready);
499 init_completion(&wil->wmi_call);
500 init_completion(&wil->halp.comp);
501
502 wil->bcast_vring = -1;
503 setup_timer(&wil->connect_timer, wil_connect_timer_fn, (ulong)wil);
504 setup_timer(&wil->scan_timer, wil_scan_timer_fn, (ulong)wil);
505 setup_timer(&wil->p2p.discovery_timer, wil_p2p_discovery_timer_fn,
506 (ulong)wil);
507
508 INIT_WORK(&wil->disconnect_worker, wil_disconnect_worker);
509 INIT_WORK(&wil->wmi_event_worker, wmi_event_worker);
510 INIT_WORK(&wil->fw_error_worker, wil_fw_error_worker);
511 INIT_WORK(&wil->probe_client_worker, wil_probe_client_worker);
512
513 INIT_LIST_HEAD(&wil->pending_wmi_ev);
514 INIT_LIST_HEAD(&wil->probe_client_pending);
515 spin_lock_init(&wil->wmi_ev_lock);
516 init_waitqueue_head(&wil->wq);
517
518 wil->wmi_wq = create_singlethread_workqueue(WIL_NAME "_wmi");
519 if (!wil->wmi_wq)
520 return -EAGAIN;
521
522 wil->wq_service = create_singlethread_workqueue(WIL_NAME "_service");
523 if (!wil->wq_service)
524 goto out_wmi_wq;
525
526 wil->last_fw_recovery = jiffies;
527 wil->tx_interframe_timeout = WIL6210_ITR_TX_INTERFRAME_TIMEOUT_DEFAULT;
528 wil->rx_interframe_timeout = WIL6210_ITR_RX_INTERFRAME_TIMEOUT_DEFAULT;
529 wil->tx_max_burst_duration = WIL6210_ITR_TX_MAX_BURST_DURATION_DEFAULT;
530 wil->rx_max_burst_duration = WIL6210_ITR_RX_MAX_BURST_DURATION_DEFAULT;
531
532 if (rx_ring_overflow_thrsh == WIL6210_RX_HIGH_TRSH_INIT)
533 rx_ring_overflow_thrsh = WIL6210_RX_HIGH_TRSH_DEFAULT;
534 return 0;
535
536 out_wmi_wq:
537 destroy_workqueue(wil->wmi_wq);
538
539 return -EAGAIN;
540 }
541
542 /**
543 * wil6210_disconnect - disconnect one connection
544 * @wil: driver context
545 * @bssid: peer to disconnect, NULL to disconnect all
546 * @reason_code: Reason code for the Disassociation frame
547 * @from_event: whether is invoked from FW event handler
548 *
549 * Disconnect and release associated resources. If invoked not from the
550 * FW event handler, issue WMI command(s) to trigger MAC disconnect.
551 */
552 void wil6210_disconnect(struct wil6210_priv *wil, const u8 *bssid,
553 u16 reason_code, bool from_event)
554 {
555 wil_dbg_misc(wil, "%s()\n", __func__);
556
557 del_timer_sync(&wil->connect_timer);
558 _wil6210_disconnect(wil, bssid, reason_code, from_event);
559 }
560
561 void wil_priv_deinit(struct wil6210_priv *wil)
562 {
563 wil_dbg_misc(wil, "%s()\n", __func__);
564
565 wil_set_recovery_state(wil, fw_recovery_idle);
566 del_timer_sync(&wil->scan_timer);
567 del_timer_sync(&wil->p2p.discovery_timer);
568 cancel_work_sync(&wil->disconnect_worker);
569 cancel_work_sync(&wil->fw_error_worker);
570 cancel_work_sync(&wil->p2p.discovery_expired_work);
571 mutex_lock(&wil->mutex);
572 wil6210_disconnect(wil, NULL, WLAN_REASON_DEAUTH_LEAVING, false);
573 mutex_unlock(&wil->mutex);
574 wmi_event_flush(wil);
575 wil_probe_client_flush(wil);
576 cancel_work_sync(&wil->probe_client_worker);
577 destroy_workqueue(wil->wq_service);
578 destroy_workqueue(wil->wmi_wq);
579 }
580
581 static inline void wil_halt_cpu(struct wil6210_priv *wil)
582 {
583 wil_w(wil, RGF_USER_USER_CPU_0, BIT_USER_USER_CPU_MAN_RST);
584 wil_w(wil, RGF_USER_MAC_CPU_0, BIT_USER_MAC_CPU_MAN_RST);
585 }
586
587 static inline void wil_release_cpu(struct wil6210_priv *wil)
588 {
589 /* Start CPU */
590 wil_w(wil, RGF_USER_USER_CPU_0, 1);
591 }
592
593 static void wil_set_oob_mode(struct wil6210_priv *wil, bool enable)
594 {
595 wil_info(wil, "%s: enable=%d\n", __func__, enable);
596 if (enable)
597 wil_s(wil, RGF_USER_USAGE_6, BIT_USER_OOB_MODE);
598 else
599 wil_c(wil, RGF_USER_USAGE_6, BIT_USER_OOB_MODE);
600 }
601
602 static int wil_target_reset(struct wil6210_priv *wil)
603 {
604 int delay = 0;
605 u32 x, x1 = 0;
606
607 wil_dbg_misc(wil, "Resetting \"%s\"...\n", wil->hw_name);
608
609 /* Clear MAC link up */
610 wil_s(wil, RGF_HP_CTRL, BIT(15));
611 wil_s(wil, RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT_HPAL_PERST_FROM_PAD);
612 wil_s(wil, RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT_CAR_PERST_RST);
613
614 wil_halt_cpu(wil);
615
616 /* clear all boot loader "ready" bits */
617 wil_w(wil, RGF_USER_BL +
618 offsetof(struct bl_dedicated_registers_v0, boot_loader_ready), 0);
619 /* Clear Fw Download notification */
620 wil_c(wil, RGF_USER_USAGE_6, BIT(0));
621
622 wil_s(wil, RGF_CAF_OSC_CONTROL, BIT_CAF_OSC_XTAL_EN);
623 /* XTAL stabilization should take about 3ms */
624 usleep_range(5000, 7000);
625 x = wil_r(wil, RGF_CAF_PLL_LOCK_STATUS);
626 if (!(x & BIT_CAF_OSC_DIG_XTAL_STABLE)) {
627 wil_err(wil, "Xtal stabilization timeout\n"
628 "RGF_CAF_PLL_LOCK_STATUS = 0x%08x\n", x);
629 return -ETIME;
630 }
631 /* switch 10k to XTAL*/
632 wil_c(wil, RGF_USER_SPARROW_M_4, BIT_SPARROW_M_4_SEL_SLEEP_OR_REF);
633 /* 40 MHz */
634 wil_c(wil, RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_CAR_AHB_SW_SEL);
635
636 wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x3ff81f);
637 wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_1, 0xf);
638
639 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0xFE000000);
640 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0x0000003F);
641 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x000000f0);
642 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0xFFE7FE00);
643
644 wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x0);
645 wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_1, 0x0);
646
647 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0);
648 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0);
649 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0);
650 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
651
652 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000003);
653 /* reset A2 PCIE AHB */
654 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00008000);
655
656 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
657
658 /* wait until device ready. typical time is 20..80 msec */
659 do {
660 msleep(RST_DELAY);
661 x = wil_r(wil, RGF_USER_BL +
662 offsetof(struct bl_dedicated_registers_v0,
663 boot_loader_ready));
664 if (x1 != x) {
665 wil_dbg_misc(wil, "BL.ready 0x%08x => 0x%08x\n", x1, x);
666 x1 = x;
667 }
668 if (delay++ > RST_COUNT) {
669 wil_err(wil, "Reset not completed, bl.ready 0x%08x\n",
670 x);
671 return -ETIME;
672 }
673 } while (x != BL_READY);
674
675 wil_c(wil, RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_RST_PWGD);
676
677 /* enable fix for HW bug related to the SA/DA swap in AP Rx */
678 wil_s(wil, RGF_DMA_OFUL_NID_0, BIT_DMA_OFUL_NID_0_RX_EXT_TR_EN |
679 BIT_DMA_OFUL_NID_0_RX_EXT_A3_SRC);
680
681 wil_dbg_misc(wil, "Reset completed in %d ms\n", delay * RST_DELAY);
682 return 0;
683 }
684
685 void wil_mbox_ring_le2cpus(struct wil6210_mbox_ring *r)
686 {
687 le32_to_cpus(&r->base);
688 le16_to_cpus(&r->entry_size);
689 le16_to_cpus(&r->size);
690 le32_to_cpus(&r->tail);
691 le32_to_cpus(&r->head);
692 }
693
694 static int wil_get_bl_info(struct wil6210_priv *wil)
695 {
696 struct net_device *ndev = wil_to_ndev(wil);
697 struct wiphy *wiphy = wil_to_wiphy(wil);
698 union {
699 struct bl_dedicated_registers_v0 bl0;
700 struct bl_dedicated_registers_v1 bl1;
701 } bl;
702 u32 bl_ver;
703 u8 *mac;
704 u16 rf_status;
705
706 wil_memcpy_fromio_32(&bl, wil->csr + HOSTADDR(RGF_USER_BL),
707 sizeof(bl));
708 bl_ver = le32_to_cpu(bl.bl0.boot_loader_struct_version);
709 mac = bl.bl0.mac_address;
710
711 if (bl_ver == 0) {
712 le32_to_cpus(&bl.bl0.rf_type);
713 le32_to_cpus(&bl.bl0.baseband_type);
714 rf_status = 0; /* actually, unknown */
715 wil_info(wil,
716 "Boot Loader struct v%d: MAC = %pM RF = 0x%08x bband = 0x%08x\n",
717 bl_ver, mac,
718 bl.bl0.rf_type, bl.bl0.baseband_type);
719 wil_info(wil, "Boot Loader build unknown for struct v0\n");
720 } else {
721 le16_to_cpus(&bl.bl1.rf_type);
722 rf_status = le16_to_cpu(bl.bl1.rf_status);
723 le32_to_cpus(&bl.bl1.baseband_type);
724 le16_to_cpus(&bl.bl1.bl_version_subminor);
725 le16_to_cpus(&bl.bl1.bl_version_build);
726 wil_info(wil,
727 "Boot Loader struct v%d: MAC = %pM RF = 0x%04x (status 0x%04x) bband = 0x%08x\n",
728 bl_ver, mac,
729 bl.bl1.rf_type, rf_status,
730 bl.bl1.baseband_type);
731 wil_info(wil, "Boot Loader build %d.%d.%d.%d\n",
732 bl.bl1.bl_version_major, bl.bl1.bl_version_minor,
733 bl.bl1.bl_version_subminor, bl.bl1.bl_version_build);
734 }
735
736 if (!is_valid_ether_addr(mac)) {
737 wil_err(wil, "BL: Invalid MAC %pM\n", mac);
738 return -EINVAL;
739 }
740
741 ether_addr_copy(ndev->perm_addr, mac);
742 ether_addr_copy(wiphy->perm_addr, mac);
743 if (!is_valid_ether_addr(ndev->dev_addr))
744 ether_addr_copy(ndev->dev_addr, mac);
745
746 if (rf_status) {/* bad RF cable? */
747 wil_err(wil, "RF communication error 0x%04x",
748 rf_status);
749 return -EAGAIN;
750 }
751
752 return 0;
753 }
754
755 static void wil_bl_crash_info(struct wil6210_priv *wil, bool is_err)
756 {
757 u32 bl_assert_code, bl_assert_blink, bl_magic_number;
758 u32 bl_ver = wil_r(wil, RGF_USER_BL +
759 offsetof(struct bl_dedicated_registers_v0,
760 boot_loader_struct_version));
761
762 if (bl_ver < 2)
763 return;
764
765 bl_assert_code = wil_r(wil, RGF_USER_BL +
766 offsetof(struct bl_dedicated_registers_v1,
767 bl_assert_code));
768 bl_assert_blink = wil_r(wil, RGF_USER_BL +
769 offsetof(struct bl_dedicated_registers_v1,
770 bl_assert_blink));
771 bl_magic_number = wil_r(wil, RGF_USER_BL +
772 offsetof(struct bl_dedicated_registers_v1,
773 bl_magic_number));
774
775 if (is_err) {
776 wil_err(wil,
777 "BL assert code 0x%08x blink 0x%08x magic 0x%08x\n",
778 bl_assert_code, bl_assert_blink, bl_magic_number);
779 } else {
780 wil_dbg_misc(wil,
781 "BL assert code 0x%08x blink 0x%08x magic 0x%08x\n",
782 bl_assert_code, bl_assert_blink, bl_magic_number);
783 }
784 }
785
786 static int wil_wait_for_fw_ready(struct wil6210_priv *wil)
787 {
788 ulong to = msecs_to_jiffies(1000);
789 ulong left = wait_for_completion_timeout(&wil->wmi_ready, to);
790
791 if (0 == left) {
792 wil_err(wil, "Firmware not ready\n");
793 return -ETIME;
794 } else {
795 wil_info(wil, "FW ready after %d ms. HW version 0x%08x\n",
796 jiffies_to_msecs(to-left), wil->hw_version);
797 }
798 return 0;
799 }
800
801 /*
802 * We reset all the structures, and we reset the UMAC.
803 * After calling this routine, you're expected to reload
804 * the firmware.
805 */
806 int wil_reset(struct wil6210_priv *wil, bool load_fw)
807 {
808 int rc;
809
810 wil_dbg_misc(wil, "%s()\n", __func__);
811
812 WARN_ON(!mutex_is_locked(&wil->mutex));
813 WARN_ON(test_bit(wil_status_napi_en, wil->status));
814
815 if (debug_fw) {
816 static const u8 mac[ETH_ALEN] = {
817 0x00, 0xde, 0xad, 0x12, 0x34, 0x56,
818 };
819 struct net_device *ndev = wil_to_ndev(wil);
820
821 ether_addr_copy(ndev->perm_addr, mac);
822 ether_addr_copy(ndev->dev_addr, ndev->perm_addr);
823 return 0;
824 }
825
826 if (wil->hw_version == HW_VER_UNKNOWN)
827 return -ENODEV;
828
829 if (wil->platform_ops.notify) {
830 rc = wil->platform_ops.notify(wil->platform_handle,
831 WIL_PLATFORM_EVT_PRE_RESET);
832 if (rc)
833 wil_err(wil,
834 "%s: PRE_RESET platform notify failed, rc %d\n",
835 __func__, rc);
836 }
837
838 set_bit(wil_status_resetting, wil->status);
839
840 cancel_work_sync(&wil->disconnect_worker);
841 wil6210_disconnect(wil, NULL, WLAN_REASON_DEAUTH_LEAVING, false);
842 wil_bcast_fini(wil);
843
844 /* Disable device led before reset*/
845 wmi_led_cfg(wil, false);
846
847 /* prevent NAPI from being scheduled and prevent wmi commands */
848 mutex_lock(&wil->wmi_mutex);
849 bitmap_zero(wil->status, wil_status_last);
850 mutex_unlock(&wil->wmi_mutex);
851
852 if (wil->scan_request) {
853 wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
854 wil->scan_request);
855 del_timer_sync(&wil->scan_timer);
856 cfg80211_scan_done(wil->scan_request, true);
857 wil->scan_request = NULL;
858 }
859
860 wil_mask_irq(wil);
861
862 wmi_event_flush(wil);
863
864 flush_workqueue(wil->wq_service);
865 flush_workqueue(wil->wmi_wq);
866
867 wil_bl_crash_info(wil, false);
868 rc = wil_target_reset(wil);
869 wil_rx_fini(wil);
870 if (rc) {
871 wil_bl_crash_info(wil, true);
872 return rc;
873 }
874
875 rc = wil_get_bl_info(wil);
876 if (rc == -EAGAIN && !load_fw) /* ignore RF error if not going up */
877 rc = 0;
878 if (rc)
879 return rc;
880
881 wil_set_oob_mode(wil, oob_mode);
882 if (load_fw) {
883 wil_info(wil, "Use firmware <%s> + board <%s>\n", WIL_FW_NAME,
884 WIL_FW2_NAME);
885
886 wil_halt_cpu(wil);
887 /* Loading f/w from the file */
888 rc = wil_request_firmware(wil, WIL_FW_NAME);
889 if (rc)
890 return rc;
891 rc = wil_request_firmware(wil, WIL_FW2_NAME);
892 if (rc)
893 return rc;
894
895 /* Mark FW as loaded from host */
896 wil_s(wil, RGF_USER_USAGE_6, 1);
897
898 /* clear any interrupts which on-card-firmware
899 * may have set
900 */
901 wil6210_clear_irq(wil);
902 /* CAF_ICR - clear and mask */
903 /* it is W1C, clear by writing back same value */
904 wil_s(wil, RGF_CAF_ICR + offsetof(struct RGF_ICR, ICR), 0);
905 wil_w(wil, RGF_CAF_ICR + offsetof(struct RGF_ICR, IMV), ~0);
906
907 wil_release_cpu(wil);
908 }
909
910 /* init after reset */
911 wil->ap_isolate = 0;
912 reinit_completion(&wil->wmi_ready);
913 reinit_completion(&wil->wmi_call);
914 reinit_completion(&wil->halp.comp);
915
916 if (load_fw) {
917 wil_configure_interrupt_moderation(wil);
918 wil_unmask_irq(wil);
919
920 /* we just started MAC, wait for FW ready */
921 rc = wil_wait_for_fw_ready(wil);
922 if (rc)
923 return rc;
924
925 /* check FW is responsive */
926 rc = wmi_echo(wil);
927 if (rc) {
928 wil_err(wil, "%s: wmi_echo failed, rc %d\n",
929 __func__, rc);
930 return rc;
931 }
932
933 if (wil->platform_ops.notify) {
934 rc = wil->platform_ops.notify(wil->platform_handle,
935 WIL_PLATFORM_EVT_FW_RDY);
936 if (rc) {
937 wil_err(wil,
938 "%s: FW_RDY notify failed, rc %d\n",
939 __func__, rc);
940 rc = 0;
941 }
942 }
943 }
944
945 return rc;
946 }
947
948 void wil_fw_error_recovery(struct wil6210_priv *wil)
949 {
950 wil_dbg_misc(wil, "starting fw error recovery\n");
951
952 if (test_bit(wil_status_resetting, wil->status)) {
953 wil_info(wil, "Reset already in progress\n");
954 return;
955 }
956
957 wil->recovery_state = fw_recovery_pending;
958 schedule_work(&wil->fw_error_worker);
959 }
960
961 int __wil_up(struct wil6210_priv *wil)
962 {
963 struct net_device *ndev = wil_to_ndev(wil);
964 struct wireless_dev *wdev = wil->wdev;
965 int rc;
966
967 WARN_ON(!mutex_is_locked(&wil->mutex));
968
969 rc = wil_reset(wil, true);
970 if (rc)
971 return rc;
972
973 /* Rx VRING. After MAC and beacon */
974 rc = wil_rx_init(wil, 1 << rx_ring_order);
975 if (rc)
976 return rc;
977
978 switch (wdev->iftype) {
979 case NL80211_IFTYPE_STATION:
980 wil_dbg_misc(wil, "type: STATION\n");
981 ndev->type = ARPHRD_ETHER;
982 break;
983 case NL80211_IFTYPE_AP:
984 wil_dbg_misc(wil, "type: AP\n");
985 ndev->type = ARPHRD_ETHER;
986 break;
987 case NL80211_IFTYPE_P2P_CLIENT:
988 wil_dbg_misc(wil, "type: P2P_CLIENT\n");
989 ndev->type = ARPHRD_ETHER;
990 break;
991 case NL80211_IFTYPE_P2P_GO:
992 wil_dbg_misc(wil, "type: P2P_GO\n");
993 ndev->type = ARPHRD_ETHER;
994 break;
995 case NL80211_IFTYPE_MONITOR:
996 wil_dbg_misc(wil, "type: Monitor\n");
997 ndev->type = ARPHRD_IEEE80211_RADIOTAP;
998 /* ARPHRD_IEEE80211 or ARPHRD_IEEE80211_RADIOTAP ? */
999 break;
1000 default:
1001 return -EOPNOTSUPP;
1002 }
1003
1004 /* MAC address - pre-requisite for other commands */
1005 wmi_set_mac_address(wil, ndev->dev_addr);
1006
1007 wil_dbg_misc(wil, "NAPI enable\n");
1008 napi_enable(&wil->napi_rx);
1009 napi_enable(&wil->napi_tx);
1010 set_bit(wil_status_napi_en, wil->status);
1011
1012 if (wil->platform_ops.bus_request)
1013 wil->platform_ops.bus_request(wil->platform_handle,
1014 WIL_MAX_BUS_REQUEST_KBPS);
1015
1016 return 0;
1017 }
1018
1019 int wil_up(struct wil6210_priv *wil)
1020 {
1021 int rc;
1022
1023 wil_dbg_misc(wil, "%s()\n", __func__);
1024
1025 mutex_lock(&wil->mutex);
1026 rc = __wil_up(wil);
1027 mutex_unlock(&wil->mutex);
1028
1029 return rc;
1030 }
1031
1032 int __wil_down(struct wil6210_priv *wil)
1033 {
1034 int rc;
1035
1036 WARN_ON(!mutex_is_locked(&wil->mutex));
1037
1038 if (wil->platform_ops.bus_request)
1039 wil->platform_ops.bus_request(wil->platform_handle, 0);
1040
1041 wil_disable_irq(wil);
1042 if (test_and_clear_bit(wil_status_napi_en, wil->status)) {
1043 napi_disable(&wil->napi_rx);
1044 napi_disable(&wil->napi_tx);
1045 wil_dbg_misc(wil, "NAPI disable\n");
1046 }
1047 wil_enable_irq(wil);
1048
1049 (void)wil_p2p_stop_discovery(wil);
1050
1051 if (wil->scan_request) {
1052 wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
1053 wil->scan_request);
1054 del_timer_sync(&wil->scan_timer);
1055 cfg80211_scan_done(wil->scan_request, true);
1056 wil->scan_request = NULL;
1057 }
1058
1059 if (test_bit(wil_status_fwconnected, wil->status) ||
1060 test_bit(wil_status_fwconnecting, wil->status)) {
1061
1062 mutex_unlock(&wil->mutex);
1063 rc = wmi_call(wil, WMI_DISCONNECT_CMDID, NULL, 0,
1064 WMI_DISCONNECT_EVENTID, NULL, 0,
1065 WIL6210_DISCONNECT_TO_MS);
1066 mutex_lock(&wil->mutex);
1067 if (rc)
1068 wil_err(wil, "timeout waiting for disconnect\n");
1069 }
1070
1071 wil_reset(wil, false);
1072
1073 return 0;
1074 }
1075
1076 int wil_down(struct wil6210_priv *wil)
1077 {
1078 int rc;
1079
1080 wil_dbg_misc(wil, "%s()\n", __func__);
1081
1082 wil_set_recovery_state(wil, fw_recovery_idle);
1083 mutex_lock(&wil->mutex);
1084 rc = __wil_down(wil);
1085 mutex_unlock(&wil->mutex);
1086
1087 return rc;
1088 }
1089
1090 int wil_find_cid(struct wil6210_priv *wil, const u8 *mac)
1091 {
1092 int i;
1093 int rc = -ENOENT;
1094
1095 for (i = 0; i < ARRAY_SIZE(wil->sta); i++) {
1096 if ((wil->sta[i].status != wil_sta_unused) &&
1097 ether_addr_equal(wil->sta[i].addr, mac)) {
1098 rc = i;
1099 break;
1100 }
1101 }
1102
1103 return rc;
1104 }
1105
1106 void wil_halp_vote(struct wil6210_priv *wil)
1107 {
1108 unsigned long rc;
1109 unsigned long to_jiffies = msecs_to_jiffies(WAIT_FOR_HALP_VOTE_MS);
1110
1111 mutex_lock(&wil->halp.lock);
1112
1113 wil_dbg_misc(wil, "%s: start, HALP ref_cnt (%d)\n", __func__,
1114 wil->halp.ref_cnt);
1115
1116 if (++wil->halp.ref_cnt == 1) {
1117 wil6210_set_halp(wil);
1118 rc = wait_for_completion_timeout(&wil->halp.comp, to_jiffies);
1119 if (!rc)
1120 wil_err(wil, "%s: HALP vote timed out\n", __func__);
1121 else
1122 wil_dbg_misc(wil,
1123 "%s: HALP vote completed after %d ms\n",
1124 __func__,
1125 jiffies_to_msecs(to_jiffies - rc));
1126 }
1127
1128 wil_dbg_misc(wil, "%s: end, HALP ref_cnt (%d)\n", __func__,
1129 wil->halp.ref_cnt);
1130
1131 mutex_unlock(&wil->halp.lock);
1132 }
1133
1134 void wil_halp_unvote(struct wil6210_priv *wil)
1135 {
1136 WARN_ON(wil->halp.ref_cnt == 0);
1137
1138 mutex_lock(&wil->halp.lock);
1139
1140 wil_dbg_misc(wil, "%s: start, HALP ref_cnt (%d)\n", __func__,
1141 wil->halp.ref_cnt);
1142
1143 if (--wil->halp.ref_cnt == 0) {
1144 wil6210_clear_halp(wil);
1145 wil_dbg_misc(wil, "%s: HALP unvote\n", __func__);
1146 }
1147
1148 wil_dbg_misc(wil, "%s: end, HALP ref_cnt (%d)\n", __func__,
1149 wil->halp.ref_cnt);
1150
1151 mutex_unlock(&wil->halp.lock);
1152 }
Linux kernel - Deliverables
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