1 /*
2 * Copyright (c) 2012-2015 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_DISCONNECT_TIMEOUT_MS 2000
27 #define WAIT_FOR_DISCONNECT_INTERVAL_MS 10
28
29 bool debug_fw; /* = false; */
30 module_param(debug_fw, bool, S_IRUGO);
31 MODULE_PARM_DESC(debug_fw, " do not perform card reset. For FW debug");
32
33 bool no_fw_recovery;
34 module_param(no_fw_recovery, bool, S_IRUGO | S_IWUSR);
35 MODULE_PARM_DESC(no_fw_recovery, " disable automatic FW error recovery");
36
37 /* if not set via modparam, will be set to default value of 1/8 of
38 * rx ring size during init flow
39 */
40 unsigned short rx_ring_overflow_thrsh = WIL6210_RX_HIGH_TRSH_INIT;
41 module_param(rx_ring_overflow_thrsh, ushort, S_IRUGO);
42 MODULE_PARM_DESC(rx_ring_overflow_thrsh,
43 " RX ring overflow threshold in descriptors.");
44
45 /* We allow allocation of more than 1 page buffers to support large packets.
46 * It is suboptimal behavior performance wise in case MTU above page size.
47 */
48 unsigned int mtu_max = TXRX_BUF_LEN_DEFAULT - WIL_MAX_MPDU_OVERHEAD;
mtu_max_set(const char * val,const struct kernel_param * kp)49 static int mtu_max_set(const char *val, const struct kernel_param *kp)
50 {
51 int ret;
52
53 /* sets mtu_max directly. no need to restore it in case of
54 * illegal value since we assume this will fail insmod
55 */
56 ret = param_set_uint(val, kp);
57 if (ret)
58 return ret;
59
60 if (mtu_max < 68 || mtu_max > WIL_MAX_ETH_MTU)
61 ret = -EINVAL;
62
63 return ret;
64 }
65
66 static const struct kernel_param_ops mtu_max_ops = {
67 .set = mtu_max_set,
68 .get = param_get_uint,
69 };
70
71 module_param_cb(mtu_max, &mtu_max_ops, &mtu_max, S_IRUGO);
72 MODULE_PARM_DESC(mtu_max, " Max MTU value.");
73
74 static uint rx_ring_order = WIL_RX_RING_SIZE_ORDER_DEFAULT;
75 static uint tx_ring_order = WIL_TX_RING_SIZE_ORDER_DEFAULT;
76 static uint bcast_ring_order = WIL_BCAST_RING_SIZE_ORDER_DEFAULT;
77
ring_order_set(const char * val,const struct kernel_param * kp)78 static int ring_order_set(const char *val, const struct kernel_param *kp)
79 {
80 int ret;
81 uint x;
82
83 ret = kstrtouint(val, 0, &x);
84 if (ret)
85 return ret;
86
87 if ((x < WIL_RING_SIZE_ORDER_MIN) || (x > WIL_RING_SIZE_ORDER_MAX))
88 return -EINVAL;
89
90 *((uint *)kp->arg) = x;
91
92 return 0;
93 }
94
95 static const struct kernel_param_ops ring_order_ops = {
96 .set = ring_order_set,
97 .get = param_get_uint,
98 };
99
100 module_param_cb(rx_ring_order, &ring_order_ops, &rx_ring_order, S_IRUGO);
101 MODULE_PARM_DESC(rx_ring_order, " Rx ring order; size = 1 << order");
102 module_param_cb(tx_ring_order, &ring_order_ops, &tx_ring_order, S_IRUGO);
103 MODULE_PARM_DESC(tx_ring_order, " Tx ring order; size = 1 << order");
104 module_param_cb(bcast_ring_order, &ring_order_ops, &bcast_ring_order, S_IRUGO);
105 MODULE_PARM_DESC(bcast_ring_order, " Bcast ring order; size = 1 << order");
106
107 #define RST_DELAY (20) /* msec, for loop in @wil_target_reset */
108 #define RST_COUNT (1 + 1000/RST_DELAY) /* round up to be above 1 sec total */
109
110 /*
111 * Due to a hardware issue,
112 * one has to read/write to/from NIC in 32-bit chunks;
113 * regular memcpy_fromio and siblings will
114 * not work on 64-bit platform - it uses 64-bit transactions
115 *
116 * Force 32-bit transactions to enable NIC on 64-bit platforms
117 *
118 * To avoid byte swap on big endian host, __raw_{read|write}l
119 * should be used - {read|write}l would swap bytes to provide
120 * little endian on PCI value in host endianness.
121 */
wil_memcpy_fromio_32(void * dst,const volatile void __iomem * src,size_t count)122 void wil_memcpy_fromio_32(void *dst, const volatile void __iomem *src,
123 size_t count)
124 {
125 u32 *d = dst;
126 const volatile u32 __iomem *s = src;
127
128 for (; count >= 4; count -= 4)
129 *d++ = __raw_readl(s++);
130
131 if (unlikely(count)) {
132 /* count can be 1..3 */
133 u32 tmp = __raw_readl(s);
134
135 memcpy(d, &tmp, count);
136 }
137 }
138
wil_memcpy_toio_32(volatile void __iomem * dst,const void * src,size_t count)139 void wil_memcpy_toio_32(volatile void __iomem *dst, const void *src,
140 size_t count)
141 {
142 volatile u32 __iomem *d = dst;
143 const u32 *s = src;
144
145 for (; count >= 4; count -= 4)
146 __raw_writel(*s++, d++);
147
148 if (unlikely(count)) {
149 /* count can be 1..3 */
150 u32 tmp = 0;
151
152 memcpy(&tmp, s, count);
153 __raw_writel(tmp, d);
154 }
155 }
156
wil_disconnect_cid(struct wil6210_priv * wil,int cid,u16 reason_code,bool from_event)157 static void wil_disconnect_cid(struct wil6210_priv *wil, int cid,
158 u16 reason_code, bool from_event)
159 __acquires(&sta->tid_rx_lock) __releases(&sta->tid_rx_lock)
160 {
161 uint i;
162 struct net_device *ndev = wil_to_ndev(wil);
163 struct wireless_dev *wdev = wil->wdev;
164 struct wil_sta_info *sta = &wil->sta[cid];
165
166 might_sleep();
167 wil_dbg_misc(wil, "%s(CID %d, status %d)\n", __func__, cid,
168 sta->status);
169
170 if (sta->status != wil_sta_unused) {
171 if (!from_event)
172 wmi_disconnect_sta(wil, sta->addr, reason_code);
173
174 switch (wdev->iftype) {
175 case NL80211_IFTYPE_AP:
176 case NL80211_IFTYPE_P2P_GO:
177 /* AP-like interface */
178 cfg80211_del_sta(ndev, sta->addr, GFP_KERNEL);
179 break;
180 default:
181 break;
182 }
183 sta->status = wil_sta_unused;
184 }
185
186 for (i = 0; i < WIL_STA_TID_NUM; i++) {
187 struct wil_tid_ampdu_rx *r;
188
189 spin_lock_bh(&sta->tid_rx_lock);
190
191 r = sta->tid_rx[i];
192 sta->tid_rx[i] = NULL;
193 wil_tid_ampdu_rx_free(wil, r);
194
195 spin_unlock_bh(&sta->tid_rx_lock);
196 }
197 for (i = 0; i < ARRAY_SIZE(wil->vring_tx); i++) {
198 if (wil->vring2cid_tid[i][0] == cid)
199 wil_vring_fini_tx(wil, i);
200 }
201 memset(&sta->stats, 0, sizeof(sta->stats));
202 }
203
_wil6210_disconnect(struct wil6210_priv * wil,const u8 * bssid,u16 reason_code,bool from_event)204 static void _wil6210_disconnect(struct wil6210_priv *wil, const u8 *bssid,
205 u16 reason_code, bool from_event)
206 {
207 int cid = -ENOENT;
208 struct net_device *ndev = wil_to_ndev(wil);
209 struct wireless_dev *wdev = wil->wdev;
210
211 might_sleep();
212 wil_dbg_misc(wil, "%s(bssid=%pM, reason=%d, ev%s)\n", __func__, bssid,
213 reason_code, from_event ? "+" : "-");
214
215 /* Cases are:
216 * - disconnect single STA, still connected
217 * - disconnect single STA, already disconnected
218 * - disconnect all
219 *
220 * For "disconnect all", there are 3 options:
221 * - bssid == NULL
222 * - bssid is broadcast address (ff:ff:ff:ff:ff:ff)
223 * - bssid is our MAC address
224 */
225 if (bssid && !is_broadcast_ether_addr(bssid) &&
226 !ether_addr_equal_unaligned(ndev->dev_addr, bssid)) {
227 cid = wil_find_cid(wil, bssid);
228 wil_dbg_misc(wil, "Disconnect %pM, CID=%d, reason=%d\n",
229 bssid, cid, reason_code);
230 if (cid >= 0) /* disconnect 1 peer */
231 wil_disconnect_cid(wil, cid, reason_code, from_event);
232 } else { /* all */
233 wil_dbg_misc(wil, "Disconnect all\n");
234 for (cid = 0; cid < WIL6210_MAX_CID; cid++)
235 wil_disconnect_cid(wil, cid, reason_code, from_event);
236 }
237
238 /* link state */
239 switch (wdev->iftype) {
240 case NL80211_IFTYPE_STATION:
241 case NL80211_IFTYPE_P2P_CLIENT:
242 wil_bcast_fini(wil);
243 netif_tx_stop_all_queues(ndev);
244 netif_carrier_off(ndev);
245
246 if (test_bit(wil_status_fwconnected, wil->status)) {
247 clear_bit(wil_status_fwconnected, wil->status);
248 cfg80211_disconnected(ndev, reason_code,
249 NULL, 0, false, GFP_KERNEL);
250 } else if (test_bit(wil_status_fwconnecting, wil->status)) {
251 cfg80211_connect_result(ndev, bssid, NULL, 0, NULL, 0,
252 WLAN_STATUS_UNSPECIFIED_FAILURE,
253 GFP_KERNEL);
254 }
255 clear_bit(wil_status_fwconnecting, wil->status);
256 break;
257 default:
258 break;
259 }
260 }
261
wil_disconnect_worker(struct work_struct * work)262 static void wil_disconnect_worker(struct work_struct *work)
263 {
264 struct wil6210_priv *wil = container_of(work,
265 struct wil6210_priv, disconnect_worker);
266
267 mutex_lock(&wil->mutex);
268 _wil6210_disconnect(wil, NULL, WLAN_REASON_UNSPECIFIED, false);
269 mutex_unlock(&wil->mutex);
270 }
271
wil_connect_timer_fn(ulong x)272 static void wil_connect_timer_fn(ulong x)
273 {
274 struct wil6210_priv *wil = (void *)x;
275
276 wil_dbg_misc(wil, "Connect timeout\n");
277
278 /* reschedule to thread context - disconnect won't
279 * run from atomic context
280 */
281 schedule_work(&wil->disconnect_worker);
282 }
283
wil_scan_timer_fn(ulong x)284 static void wil_scan_timer_fn(ulong x)
285 {
286 struct wil6210_priv *wil = (void *)x;
287
288 clear_bit(wil_status_fwready, wil->status);
289 wil_err(wil, "Scan timeout detected, start fw error recovery\n");
290 wil_fw_error_recovery(wil);
291 }
292
wil_wait_for_recovery(struct wil6210_priv * wil)293 static int wil_wait_for_recovery(struct wil6210_priv *wil)
294 {
295 if (wait_event_interruptible(wil->wq, wil->recovery_state !=
296 fw_recovery_pending)) {
297 wil_err(wil, "Interrupt, canceling recovery\n");
298 return -ERESTARTSYS;
299 }
300 if (wil->recovery_state != fw_recovery_running) {
301 wil_info(wil, "Recovery cancelled\n");
302 return -EINTR;
303 }
304 wil_info(wil, "Proceed with recovery\n");
305 return 0;
306 }
307
wil_set_recovery_state(struct wil6210_priv * wil,int state)308 void wil_set_recovery_state(struct wil6210_priv *wil, int state)
309 {
310 wil_dbg_misc(wil, "%s(%d -> %d)\n", __func__,
311 wil->recovery_state, state);
312
313 wil->recovery_state = state;
314 wake_up_interruptible(&wil->wq);
315 }
316
wil_fw_error_worker(struct work_struct * work)317 static void wil_fw_error_worker(struct work_struct *work)
318 {
319 struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
320 fw_error_worker);
321 struct wireless_dev *wdev = wil->wdev;
322
323 wil_dbg_misc(wil, "fw error worker\n");
324
325 if (!netif_running(wil_to_ndev(wil))) {
326 wil_info(wil, "No recovery - interface is down\n");
327 return;
328 }
329
330 /* increment @recovery_count if less then WIL6210_FW_RECOVERY_TO
331 * passed since last recovery attempt
332 */
333 if (time_is_after_jiffies(wil->last_fw_recovery +
334 WIL6210_FW_RECOVERY_TO))
335 wil->recovery_count++;
336 else
337 wil->recovery_count = 1; /* fw was alive for a long time */
338
339 if (wil->recovery_count > WIL6210_FW_RECOVERY_RETRIES) {
340 wil_err(wil, "too many recovery attempts (%d), giving up\n",
341 wil->recovery_count);
342 return;
343 }
344
345 wil->last_fw_recovery = jiffies;
346
347 wil_info(wil, "fw error recovery requested (try %d)...\n",
348 wil->recovery_count);
349 if (!no_fw_recovery)
350 wil->recovery_state = fw_recovery_running;
351 if (wil_wait_for_recovery(wil) != 0)
352 return;
353
354 mutex_lock(&wil->mutex);
355 switch (wdev->iftype) {
356 case NL80211_IFTYPE_STATION:
357 case NL80211_IFTYPE_P2P_CLIENT:
358 case NL80211_IFTYPE_MONITOR:
359 /* silent recovery, upper layers will see disconnect */
360 __wil_down(wil);
361 __wil_up(wil);
362 break;
363 case NL80211_IFTYPE_AP:
364 case NL80211_IFTYPE_P2P_GO:
365 wil_info(wil, "No recovery for AP-like interface\n");
366 /* recovery in these modes is done by upper layers */
367 break;
368 default:
369 wil_err(wil, "No recovery - unknown interface type %d\n",
370 wdev->iftype);
371 break;
372 }
373 mutex_unlock(&wil->mutex);
374 }
375
wil_find_free_vring(struct wil6210_priv * wil)376 static int wil_find_free_vring(struct wil6210_priv *wil)
377 {
378 int i;
379
380 for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
381 if (!wil->vring_tx[i].va)
382 return i;
383 }
384 return -EINVAL;
385 }
386
wil_bcast_init(struct wil6210_priv * wil)387 int wil_bcast_init(struct wil6210_priv *wil)
388 {
389 int ri = wil->bcast_vring, rc;
390
391 if ((ri >= 0) && wil->vring_tx[ri].va)
392 return 0;
393
394 ri = wil_find_free_vring(wil);
395 if (ri < 0)
396 return ri;
397
398 wil->bcast_vring = ri;
399 rc = wil_vring_init_bcast(wil, ri, 1 << bcast_ring_order);
400 if (rc)
401 wil->bcast_vring = -1;
402
403 return rc;
404 }
405
wil_bcast_fini(struct wil6210_priv * wil)406 void wil_bcast_fini(struct wil6210_priv *wil)
407 {
408 int ri = wil->bcast_vring;
409
410 if (ri < 0)
411 return;
412
413 wil->bcast_vring = -1;
414 wil_vring_fini_tx(wil, ri);
415 }
416
wil_connect_worker(struct work_struct * work)417 static void wil_connect_worker(struct work_struct *work)
418 {
419 int rc;
420 struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
421 connect_worker);
422 struct net_device *ndev = wil_to_ndev(wil);
423
424 int cid = wil->pending_connect_cid;
425 int ringid = wil_find_free_vring(wil);
426
427 if (cid < 0) {
428 wil_err(wil, "No connection pending\n");
429 return;
430 }
431
432 wil_dbg_wmi(wil, "Configure for connection CID %d\n", cid);
433
434 rc = wil_vring_init_tx(wil, ringid, 1 << tx_ring_order, cid, 0);
435 wil->pending_connect_cid = -1;
436 if (rc == 0) {
437 wil->sta[cid].status = wil_sta_connected;
438 netif_tx_wake_all_queues(ndev);
439 } else {
440 wil_disconnect_cid(wil, cid, WLAN_REASON_UNSPECIFIED, true);
441 }
442 }
443
wil_priv_init(struct wil6210_priv * wil)444 int wil_priv_init(struct wil6210_priv *wil)
445 {
446 uint i;
447
448 wil_dbg_misc(wil, "%s()\n", __func__);
449
450 memset(wil->sta, 0, sizeof(wil->sta));
451 for (i = 0; i < WIL6210_MAX_CID; i++)
452 spin_lock_init(&wil->sta[i].tid_rx_lock);
453
454 mutex_init(&wil->mutex);
455 mutex_init(&wil->wmi_mutex);
456 mutex_init(&wil->back_rx_mutex);
457 mutex_init(&wil->back_tx_mutex);
458 mutex_init(&wil->probe_client_mutex);
459
460 init_completion(&wil->wmi_ready);
461 init_completion(&wil->wmi_call);
462
463 wil->pending_connect_cid = -1;
464 wil->bcast_vring = -1;
465 setup_timer(&wil->connect_timer, wil_connect_timer_fn, (ulong)wil);
466 setup_timer(&wil->scan_timer, wil_scan_timer_fn, (ulong)wil);
467
468 INIT_WORK(&wil->connect_worker, wil_connect_worker);
469 INIT_WORK(&wil->disconnect_worker, wil_disconnect_worker);
470 INIT_WORK(&wil->wmi_event_worker, wmi_event_worker);
471 INIT_WORK(&wil->fw_error_worker, wil_fw_error_worker);
472 INIT_WORK(&wil->back_rx_worker, wil_back_rx_worker);
473 INIT_WORK(&wil->back_tx_worker, wil_back_tx_worker);
474 INIT_WORK(&wil->probe_client_worker, wil_probe_client_worker);
475
476 INIT_LIST_HEAD(&wil->pending_wmi_ev);
477 INIT_LIST_HEAD(&wil->back_rx_pending);
478 INIT_LIST_HEAD(&wil->back_tx_pending);
479 INIT_LIST_HEAD(&wil->probe_client_pending);
480 spin_lock_init(&wil->wmi_ev_lock);
481 init_waitqueue_head(&wil->wq);
482
483 wil->wmi_wq = create_singlethread_workqueue(WIL_NAME "_wmi");
484 if (!wil->wmi_wq)
485 return -EAGAIN;
486
487 wil->wq_service = create_singlethread_workqueue(WIL_NAME "_service");
488 if (!wil->wq_service)
489 goto out_wmi_wq;
490
491 wil->last_fw_recovery = jiffies;
492 wil->tx_interframe_timeout = WIL6210_ITR_TX_INTERFRAME_TIMEOUT_DEFAULT;
493 wil->rx_interframe_timeout = WIL6210_ITR_RX_INTERFRAME_TIMEOUT_DEFAULT;
494 wil->tx_max_burst_duration = WIL6210_ITR_TX_MAX_BURST_DURATION_DEFAULT;
495 wil->rx_max_burst_duration = WIL6210_ITR_RX_MAX_BURST_DURATION_DEFAULT;
496
497 if (rx_ring_overflow_thrsh == WIL6210_RX_HIGH_TRSH_INIT)
498 rx_ring_overflow_thrsh = WIL6210_RX_HIGH_TRSH_DEFAULT;
499 return 0;
500
501 out_wmi_wq:
502 destroy_workqueue(wil->wmi_wq);
503
504 return -EAGAIN;
505 }
506
507 /**
508 * wil6210_disconnect - disconnect one connection
509 * @wil: driver context
510 * @bssid: peer to disconnect, NULL to disconnect all
511 * @reason_code: Reason code for the Disassociation frame
512 * @from_event: whether is invoked from FW event handler
513 *
514 * Disconnect and release associated resources. If invoked not from the
515 * FW event handler, issue WMI command(s) to trigger MAC disconnect.
516 */
wil6210_disconnect(struct wil6210_priv * wil,const u8 * bssid,u16 reason_code,bool from_event)517 void wil6210_disconnect(struct wil6210_priv *wil, const u8 *bssid,
518 u16 reason_code, bool from_event)
519 {
520 wil_dbg_misc(wil, "%s()\n", __func__);
521
522 del_timer_sync(&wil->connect_timer);
523 _wil6210_disconnect(wil, bssid, reason_code, from_event);
524 }
525
wil_priv_deinit(struct wil6210_priv * wil)526 void wil_priv_deinit(struct wil6210_priv *wil)
527 {
528 wil_dbg_misc(wil, "%s()\n", __func__);
529
530 wil_set_recovery_state(wil, fw_recovery_idle);
531 del_timer_sync(&wil->scan_timer);
532 cancel_work_sync(&wil->disconnect_worker);
533 cancel_work_sync(&wil->fw_error_worker);
534 mutex_lock(&wil->mutex);
535 wil6210_disconnect(wil, NULL, WLAN_REASON_DEAUTH_LEAVING, false);
536 mutex_unlock(&wil->mutex);
537 wmi_event_flush(wil);
538 wil_back_rx_flush(wil);
539 cancel_work_sync(&wil->back_rx_worker);
540 wil_back_tx_flush(wil);
541 cancel_work_sync(&wil->back_tx_worker);
542 wil_probe_client_flush(wil);
543 cancel_work_sync(&wil->probe_client_worker);
544 destroy_workqueue(wil->wq_service);
545 destroy_workqueue(wil->wmi_wq);
546 }
547
wil_halt_cpu(struct wil6210_priv * wil)548 static inline void wil_halt_cpu(struct wil6210_priv *wil)
549 {
550 wil_w(wil, RGF_USER_USER_CPU_0, BIT_USER_USER_CPU_MAN_RST);
551 wil_w(wil, RGF_USER_MAC_CPU_0, BIT_USER_MAC_CPU_MAN_RST);
552 }
553
wil_release_cpu(struct wil6210_priv * wil)554 static inline void wil_release_cpu(struct wil6210_priv *wil)
555 {
556 /* Start CPU */
557 wil_w(wil, RGF_USER_USER_CPU_0, 1);
558 }
559
wil_target_reset(struct wil6210_priv * wil)560 static int wil_target_reset(struct wil6210_priv *wil)
561 {
562 int delay = 0;
563 u32 x, x1 = 0;
564
565 wil_dbg_misc(wil, "Resetting \"%s\"...\n", wil->hw_name);
566
567 /* Clear MAC link up */
568 wil_s(wil, RGF_HP_CTRL, BIT(15));
569 wil_s(wil, RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT_HPAL_PERST_FROM_PAD);
570 wil_s(wil, RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT_CAR_PERST_RST);
571
572 wil_halt_cpu(wil);
573
574 /* clear all boot loader "ready" bits */
575 wil_w(wil, RGF_USER_BL +
576 offsetof(struct bl_dedicated_registers_v0, boot_loader_ready), 0);
577 /* Clear Fw Download notification */
578 wil_c(wil, RGF_USER_USAGE_6, BIT(0));
579
580 wil_s(wil, RGF_CAF_OSC_CONTROL, BIT_CAF_OSC_XTAL_EN);
581 /* XTAL stabilization should take about 3ms */
582 usleep_range(5000, 7000);
583 x = wil_r(wil, RGF_CAF_PLL_LOCK_STATUS);
584 if (!(x & BIT_CAF_OSC_DIG_XTAL_STABLE)) {
585 wil_err(wil, "Xtal stabilization timeout\n"
586 "RGF_CAF_PLL_LOCK_STATUS = 0x%08x\n", x);
587 return -ETIME;
588 }
589 /* switch 10k to XTAL*/
590 wil_c(wil, RGF_USER_SPARROW_M_4, BIT_SPARROW_M_4_SEL_SLEEP_OR_REF);
591 /* 40 MHz */
592 wil_c(wil, RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_CAR_AHB_SW_SEL);
593
594 wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x3ff81f);
595 wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_1, 0xf);
596
597 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0xFE000000);
598 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0x0000003F);
599 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x000000f0);
600 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0xFFE7FE00);
601
602 wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x0);
603 wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_1, 0x0);
604
605 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0);
606 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0);
607 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0);
608 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
609
610 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000003);
611 /* reset A2 PCIE AHB */
612 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00008000);
613
614 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
615
616 /* wait until device ready. typical time is 20..80 msec */
617 do {
618 msleep(RST_DELAY);
619 x = wil_r(wil, RGF_USER_BL +
620 offsetof(struct bl_dedicated_registers_v0,
621 boot_loader_ready));
622 if (x1 != x) {
623 wil_dbg_misc(wil, "BL.ready 0x%08x => 0x%08x\n", x1, x);
624 x1 = x;
625 }
626 if (delay++ > RST_COUNT) {
627 wil_err(wil, "Reset not completed, bl.ready 0x%08x\n",
628 x);
629 return -ETIME;
630 }
631 } while (x != BL_READY);
632
633 wil_c(wil, RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_RST_PWGD);
634
635 /* enable fix for HW bug related to the SA/DA swap in AP Rx */
636 wil_s(wil, RGF_DMA_OFUL_NID_0, BIT_DMA_OFUL_NID_0_RX_EXT_TR_EN |
637 BIT_DMA_OFUL_NID_0_RX_EXT_A3_SRC);
638
639 wil_dbg_misc(wil, "Reset completed in %d ms\n", delay * RST_DELAY);
640 return 0;
641 }
642
wil_mbox_ring_le2cpus(struct wil6210_mbox_ring * r)643 void wil_mbox_ring_le2cpus(struct wil6210_mbox_ring *r)
644 {
645 le32_to_cpus(&r->base);
646 le16_to_cpus(&r->entry_size);
647 le16_to_cpus(&r->size);
648 le32_to_cpus(&r->tail);
649 le32_to_cpus(&r->head);
650 }
651
wil_get_bl_info(struct wil6210_priv * wil)652 static int wil_get_bl_info(struct wil6210_priv *wil)
653 {
654 struct net_device *ndev = wil_to_ndev(wil);
655 union {
656 struct bl_dedicated_registers_v0 bl0;
657 struct bl_dedicated_registers_v1 bl1;
658 } bl;
659 u32 bl_ver;
660 u8 *mac;
661 u16 rf_status;
662
663 wil_memcpy_fromio_32(&bl, wil->csr + HOSTADDR(RGF_USER_BL),
664 sizeof(bl));
665 bl_ver = le32_to_cpu(bl.bl0.boot_loader_struct_version);
666 mac = bl.bl0.mac_address;
667
668 if (bl_ver == 0) {
669 le32_to_cpus(&bl.bl0.rf_type);
670 le32_to_cpus(&bl.bl0.baseband_type);
671 rf_status = 0; /* actually, unknown */
672 wil_info(wil,
673 "Boot Loader struct v%d: MAC = %pM RF = 0x%08x bband = 0x%08x\n",
674 bl_ver, mac,
675 bl.bl0.rf_type, bl.bl0.baseband_type);
676 wil_info(wil, "Boot Loader build unknown for struct v0\n");
677 } else {
678 le16_to_cpus(&bl.bl1.rf_type);
679 rf_status = le16_to_cpu(bl.bl1.rf_status);
680 le32_to_cpus(&bl.bl1.baseband_type);
681 le16_to_cpus(&bl.bl1.bl_version_subminor);
682 le16_to_cpus(&bl.bl1.bl_version_build);
683 wil_info(wil,
684 "Boot Loader struct v%d: MAC = %pM RF = 0x%04x (status 0x%04x) bband = 0x%08x\n",
685 bl_ver, mac,
686 bl.bl1.rf_type, rf_status,
687 bl.bl1.baseband_type);
688 wil_info(wil, "Boot Loader build %d.%d.%d.%d\n",
689 bl.bl1.bl_version_major, bl.bl1.bl_version_minor,
690 bl.bl1.bl_version_subminor, bl.bl1.bl_version_build);
691 }
692
693 if (!is_valid_ether_addr(mac)) {
694 wil_err(wil, "BL: Invalid MAC %pM\n", mac);
695 return -EINVAL;
696 }
697
698 ether_addr_copy(ndev->perm_addr, mac);
699 if (!is_valid_ether_addr(ndev->dev_addr))
700 ether_addr_copy(ndev->dev_addr, mac);
701
702 if (rf_status) {/* bad RF cable? */
703 wil_err(wil, "RF communication error 0x%04x",
704 rf_status);
705 return -EAGAIN;
706 }
707
708 return 0;
709 }
710
wil_bl_crash_info(struct wil6210_priv * wil,bool is_err)711 static void wil_bl_crash_info(struct wil6210_priv *wil, bool is_err)
712 {
713 u32 bl_assert_code, bl_assert_blink, bl_magic_number;
714 u32 bl_ver = wil_r(wil, RGF_USER_BL +
715 offsetof(struct bl_dedicated_registers_v0,
716 boot_loader_struct_version));
717
718 if (bl_ver < 2)
719 return;
720
721 bl_assert_code = wil_r(wil, RGF_USER_BL +
722 offsetof(struct bl_dedicated_registers_v1,
723 bl_assert_code));
724 bl_assert_blink = wil_r(wil, RGF_USER_BL +
725 offsetof(struct bl_dedicated_registers_v1,
726 bl_assert_blink));
727 bl_magic_number = wil_r(wil, RGF_USER_BL +
728 offsetof(struct bl_dedicated_registers_v1,
729 bl_magic_number));
730
731 if (is_err) {
732 wil_err(wil,
733 "BL assert code 0x%08x blink 0x%08x magic 0x%08x\n",
734 bl_assert_code, bl_assert_blink, bl_magic_number);
735 } else {
736 wil_dbg_misc(wil,
737 "BL assert code 0x%08x blink 0x%08x magic 0x%08x\n",
738 bl_assert_code, bl_assert_blink, bl_magic_number);
739 }
740 }
741
wil_wait_for_fw_ready(struct wil6210_priv * wil)742 static int wil_wait_for_fw_ready(struct wil6210_priv *wil)
743 {
744 ulong to = msecs_to_jiffies(2000);
745 ulong left = wait_for_completion_timeout(&wil->wmi_ready, to);
746
747 if (0 == left) {
748 wil_err(wil, "Firmware not ready\n");
749 return -ETIME;
750 } else {
751 wil_info(wil, "FW ready after %d ms. HW version 0x%08x\n",
752 jiffies_to_msecs(to-left), wil->hw_version);
753 }
754 return 0;
755 }
756
757 /*
758 * We reset all the structures, and we reset the UMAC.
759 * After calling this routine, you're expected to reload
760 * the firmware.
761 */
wil_reset(struct wil6210_priv * wil,bool load_fw)762 int wil_reset(struct wil6210_priv *wil, bool load_fw)
763 {
764 int rc;
765
766 wil_dbg_misc(wil, "%s()\n", __func__);
767
768 WARN_ON(!mutex_is_locked(&wil->mutex));
769 WARN_ON(test_bit(wil_status_napi_en, wil->status));
770
771 if (debug_fw) {
772 static const u8 mac[ETH_ALEN] = {
773 0x00, 0xde, 0xad, 0x12, 0x34, 0x56,
774 };
775 struct net_device *ndev = wil_to_ndev(wil);
776
777 ether_addr_copy(ndev->perm_addr, mac);
778 ether_addr_copy(ndev->dev_addr, ndev->perm_addr);
779 return 0;
780 }
781
782 if (wil->hw_version == HW_VER_UNKNOWN)
783 return -ENODEV;
784
785 set_bit(wil_status_resetting, wil->status);
786
787 cancel_work_sync(&wil->disconnect_worker);
788 wil6210_disconnect(wil, NULL, WLAN_REASON_DEAUTH_LEAVING, false);
789 wil_bcast_fini(wil);
790
791 /* prevent NAPI from being scheduled */
792 bitmap_zero(wil->status, wil_status_last);
793
794 if (wil->scan_request) {
795 wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
796 wil->scan_request);
797 del_timer_sync(&wil->scan_timer);
798 cfg80211_scan_done(wil->scan_request, true);
799 wil->scan_request = NULL;
800 }
801
802 wil_mask_irq(wil);
803
804 wmi_event_flush(wil);
805
806 flush_workqueue(wil->wq_service);
807 flush_workqueue(wil->wmi_wq);
808
809 wil_bl_crash_info(wil, false);
810 rc = wil_target_reset(wil);
811 wil_rx_fini(wil);
812 if (rc) {
813 wil_bl_crash_info(wil, true);
814 return rc;
815 }
816
817 rc = wil_get_bl_info(wil);
818 if (rc == -EAGAIN && !load_fw) /* ignore RF error if not going up */
819 rc = 0;
820 if (rc)
821 return rc;
822
823 if (load_fw) {
824 wil_info(wil, "Use firmware <%s> + board <%s>\n", WIL_FW_NAME,
825 WIL_FW2_NAME);
826
827 wil_halt_cpu(wil);
828 /* Loading f/w from the file */
829 rc = wil_request_firmware(wil, WIL_FW_NAME);
830 if (rc)
831 return rc;
832 rc = wil_request_firmware(wil, WIL_FW2_NAME);
833 if (rc)
834 return rc;
835
836 /* Mark FW as loaded from host */
837 wil_s(wil, RGF_USER_USAGE_6, 1);
838
839 /* clear any interrupts which on-card-firmware
840 * may have set
841 */
842 wil6210_clear_irq(wil);
843 /* CAF_ICR - clear and mask */
844 /* it is W1C, clear by writing back same value */
845 wil_s(wil, RGF_CAF_ICR + offsetof(struct RGF_ICR, ICR), 0);
846 wil_w(wil, RGF_CAF_ICR + offsetof(struct RGF_ICR, IMV), ~0);
847
848 wil_release_cpu(wil);
849 }
850
851 /* init after reset */
852 wil->pending_connect_cid = -1;
853 wil->ap_isolate = 0;
854 reinit_completion(&wil->wmi_ready);
855 reinit_completion(&wil->wmi_call);
856
857 if (load_fw) {
858 wil_configure_interrupt_moderation(wil);
859 wil_unmask_irq(wil);
860
861 /* we just started MAC, wait for FW ready */
862 rc = wil_wait_for_fw_ready(wil);
863 if (rc == 0) /* check FW is responsive */
864 rc = wmi_echo(wil);
865 }
866
867 return rc;
868 }
869
wil_fw_error_recovery(struct wil6210_priv * wil)870 void wil_fw_error_recovery(struct wil6210_priv *wil)
871 {
872 wil_dbg_misc(wil, "starting fw error recovery\n");
873
874 if (test_bit(wil_status_resetting, wil->status)) {
875 wil_info(wil, "Reset already in progress\n");
876 return;
877 }
878
879 wil->recovery_state = fw_recovery_pending;
880 schedule_work(&wil->fw_error_worker);
881 }
882
__wil_up(struct wil6210_priv * wil)883 int __wil_up(struct wil6210_priv *wil)
884 {
885 struct net_device *ndev = wil_to_ndev(wil);
886 struct wireless_dev *wdev = wil->wdev;
887 int rc;
888
889 WARN_ON(!mutex_is_locked(&wil->mutex));
890
891 rc = wil_reset(wil, true);
892 if (rc)
893 return rc;
894
895 /* Rx VRING. After MAC and beacon */
896 rc = wil_rx_init(wil, 1 << rx_ring_order);
897 if (rc)
898 return rc;
899
900 switch (wdev->iftype) {
901 case NL80211_IFTYPE_STATION:
902 wil_dbg_misc(wil, "type: STATION\n");
903 ndev->type = ARPHRD_ETHER;
904 break;
905 case NL80211_IFTYPE_AP:
906 wil_dbg_misc(wil, "type: AP\n");
907 ndev->type = ARPHRD_ETHER;
908 break;
909 case NL80211_IFTYPE_P2P_CLIENT:
910 wil_dbg_misc(wil, "type: P2P_CLIENT\n");
911 ndev->type = ARPHRD_ETHER;
912 break;
913 case NL80211_IFTYPE_P2P_GO:
914 wil_dbg_misc(wil, "type: P2P_GO\n");
915 ndev->type = ARPHRD_ETHER;
916 break;
917 case NL80211_IFTYPE_MONITOR:
918 wil_dbg_misc(wil, "type: Monitor\n");
919 ndev->type = ARPHRD_IEEE80211_RADIOTAP;
920 /* ARPHRD_IEEE80211 or ARPHRD_IEEE80211_RADIOTAP ? */
921 break;
922 default:
923 return -EOPNOTSUPP;
924 }
925
926 /* MAC address - pre-requisite for other commands */
927 wmi_set_mac_address(wil, ndev->dev_addr);
928
929 wil_dbg_misc(wil, "NAPI enable\n");
930 napi_enable(&wil->napi_rx);
931 napi_enable(&wil->napi_tx);
932 set_bit(wil_status_napi_en, wil->status);
933
934 if (wil->platform_ops.bus_request)
935 wil->platform_ops.bus_request(wil->platform_handle,
936 WIL_MAX_BUS_REQUEST_KBPS);
937
938 return 0;
939 }
940
wil_up(struct wil6210_priv * wil)941 int wil_up(struct wil6210_priv *wil)
942 {
943 int rc;
944
945 wil_dbg_misc(wil, "%s()\n", __func__);
946
947 mutex_lock(&wil->mutex);
948 rc = __wil_up(wil);
949 mutex_unlock(&wil->mutex);
950
951 return rc;
952 }
953
__wil_down(struct wil6210_priv * wil)954 int __wil_down(struct wil6210_priv *wil)
955 {
956 int iter = WAIT_FOR_DISCONNECT_TIMEOUT_MS /
957 WAIT_FOR_DISCONNECT_INTERVAL_MS;
958
959 WARN_ON(!mutex_is_locked(&wil->mutex));
960
961 if (wil->platform_ops.bus_request)
962 wil->platform_ops.bus_request(wil->platform_handle, 0);
963
964 wil_disable_irq(wil);
965 if (test_and_clear_bit(wil_status_napi_en, wil->status)) {
966 napi_disable(&wil->napi_rx);
967 napi_disable(&wil->napi_tx);
968 wil_dbg_misc(wil, "NAPI disable\n");
969 }
970 wil_enable_irq(wil);
971
972 if (wil->scan_request) {
973 wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
974 wil->scan_request);
975 del_timer_sync(&wil->scan_timer);
976 cfg80211_scan_done(wil->scan_request, true);
977 wil->scan_request = NULL;
978 }
979
980 if (test_bit(wil_status_fwconnected, wil->status) ||
981 test_bit(wil_status_fwconnecting, wil->status))
982 wmi_send(wil, WMI_DISCONNECT_CMDID, NULL, 0);
983
984 /* make sure wil is idle (not connected) */
985 mutex_unlock(&wil->mutex);
986 while (iter--) {
987 int idle = !test_bit(wil_status_fwconnected, wil->status) &&
988 !test_bit(wil_status_fwconnecting, wil->status);
989 if (idle)
990 break;
991 msleep(WAIT_FOR_DISCONNECT_INTERVAL_MS);
992 }
993 mutex_lock(&wil->mutex);
994
995 if (!iter)
996 wil_err(wil, "timeout waiting for idle FW/HW\n");
997
998 wil_reset(wil, false);
999
1000 return 0;
1001 }
1002
wil_down(struct wil6210_priv * wil)1003 int wil_down(struct wil6210_priv *wil)
1004 {
1005 int rc;
1006
1007 wil_dbg_misc(wil, "%s()\n", __func__);
1008
1009 wil_set_recovery_state(wil, fw_recovery_idle);
1010 mutex_lock(&wil->mutex);
1011 rc = __wil_down(wil);
1012 mutex_unlock(&wil->mutex);
1013
1014 return rc;
1015 }
1016
wil_find_cid(struct wil6210_priv * wil,const u8 * mac)1017 int wil_find_cid(struct wil6210_priv *wil, const u8 *mac)
1018 {
1019 int i;
1020 int rc = -ENOENT;
1021
1022 for (i = 0; i < ARRAY_SIZE(wil->sta); i++) {
1023 if ((wil->sta[i].status != wil_sta_unused) &&
1024 ether_addr_equal(wil->sta[i].addr, mac)) {
1025 rc = i;
1026 break;
1027 }
1028 }
1029
1030 return rc;
1031 }
1032