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wil6210: prevent access to vring_tx_data lock during its init
[deliverable/linux.git] / drivers / net / wireless / ath / wil6210 / main.c
CommitLineData
2be7d22f 1/*
0916d9f2 2 * Copyright (c) 2012-2016 Qualcomm Atheros, Inc.
2be7d22f
VK		 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
2be7d22f
VK		 17#include <linux/moduleparam.h>
18#include <linux/if_arp.h>
108d1eb6 19#include <linux/etherdevice.h>
2be7d22f
VK		 20
21#include "wil6210.h"
b4490f42 22#include "txrx.h"
f172b563 23#include "wmi.h"
f1ad8c93 24#include "boot_loader.h"
f172b563
DL		 25
26#define WAIT_FOR_DISCONNECT_TIMEOUT_MS 2000
27#define WAIT_FOR_DISCONNECT_INTERVAL_MS 10
2be7d22f 28
bfc2dc7a
VK		 29bool debug_fw; /* = false; */
30module_param(debug_fw, bool, S_IRUGO);
31MODULE_PARM_DESC(debug_fw, " do not perform card reset. For FW debug");
32
c33407a8 33bool no_fw_recovery;
ed6f9dc6 34module_param(no_fw_recovery, bool, S_IRUGO | S_IWUSR);
c33407a8 35MODULE_PARM_DESC(no_fw_recovery, " disable automatic FW error recovery");
ed6f9dc6 36
ab954628
VK		 37/* if not set via modparam, will be set to default value of 1/8 of
38 * rx ring size during init flow
39 */
40unsigned short rx_ring_overflow_thrsh = WIL6210_RX_HIGH_TRSH_INIT;
41module_param(rx_ring_overflow_thrsh, ushort, S_IRUGO);
42MODULE_PARM_DESC(rx_ring_overflow_thrsh,
43 " RX ring overflow threshold in descriptors.");
b6b1b0ec 44
9a06bec9
VK		 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 */
c44690a1 48unsigned int mtu_max = TXRX_BUF_LEN_DEFAULT - WIL_MAX_MPDU_OVERHEAD;
9a06bec9
VK		 49static 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
4590d812 60 if (mtu_max < 68 || mtu_max > WIL_MAX_ETH_MTU)
9a06bec9
VK		 61 ret = -EINVAL;
62
63 return ret;
64}
65
9c27847d 66static const struct kernel_param_ops mtu_max_ops = {
9a06bec9
VK		 67 .set = mtu_max_set,
68 .get = param_get_uint,
69};
70
71module_param_cb(mtu_max, &mtu_max_ops, &mtu_max, S_IRUGO);
72MODULE_PARM_DESC(mtu_max, " Max MTU value.");
73
d3762b40
VK		 74static uint rx_ring_order = WIL_RX_RING_SIZE_ORDER_DEFAULT;
75static uint tx_ring_order = WIL_TX_RING_SIZE_ORDER_DEFAULT;
41d6b093 76static uint bcast_ring_order = WIL_BCAST_RING_SIZE_ORDER_DEFAULT;
d3762b40
VK		 77
78static 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
9c27847d 95static const struct kernel_param_ops ring_order_ops = {
d3762b40
VK		 96 .set = ring_order_set,
97 .get = param_get_uint,
98};
99
100module_param_cb(rx_ring_order, &ring_order_ops, &rx_ring_order, S_IRUGO);
101MODULE_PARM_DESC(rx_ring_order, " Rx ring order; size = 1 << order");
102module_param_cb(tx_ring_order, &ring_order_ops, &tx_ring_order, S_IRUGO);
103MODULE_PARM_DESC(tx_ring_order, " Tx ring order; size = 1 << order");
d507d1b7
VK		 104module_param_cb(bcast_ring_order, &ring_order_ops, &bcast_ring_order, S_IRUGO);
105MODULE_PARM_DESC(bcast_ring_order, " Bcast ring order; size = 1 << order");
d3762b40 106
520d68e7
VK		 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
2be7d22f
VK		 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 */
122void 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 /* size_t is unsigned, if (count%4 != 0) it will wrap */
129 for (count += 4; count > 4; count -= 4)
130 *d++ = __raw_readl(s++);
131}
132
133void wil_memcpy_toio_32(volatile void __iomem *dst, const void *src,
134 size_t count)
135{
136 volatile u32 __iomem *d = dst;
137 const u32 *s = src;
138
139 for (count += 4; count > 4; count -= 4)
140 __raw_writel(*s++, d++);
141}
142
b516fcc5 143static void wil_disconnect_cid(struct wil6210_priv *wil, int cid,
4821e6d8 144 u16 reason_code, bool from_event)
bd33273b 145__acquires(&sta->tid_rx_lock) __releases(&sta->tid_rx_lock)
91886b0b
VK		 146{
147 uint i;
fc58f681
VK		 148 struct net_device *ndev = wil_to_ndev(wil);
149 struct wireless_dev *wdev = wil->wdev;
91886b0b 150 struct wil_sta_info *sta = &wil->sta[cid];
8fe59627 151
bd33273b 152 might_sleep();
fc58f681
VK		 153 wil_dbg_misc(wil, "%s(CID %d, status %d)\n", __func__, cid,
154 sta->status);
4d55a0a1
VK		 155
156 if (sta->status != wil_sta_unused) {
b516fcc5 157 if (!from_event)
0916d9f2 158 wmi_disconnect_sta(wil, sta->addr, reason_code, true);
b516fcc5 159
fc58f681
VK		 160 switch (wdev->iftype) {
161 case NL80211_IFTYPE_AP:
162 case NL80211_IFTYPE_P2P_GO:
163 /* AP-like interface */
164 cfg80211_del_sta(ndev, sta->addr, GFP_KERNEL);
165 break;
166 default:
167 break;
168 }
4d55a0a1
VK		 169 sta->status = wil_sta_unused;
170 }
171
91886b0b 172 for (i = 0; i < WIL_STA_TID_NUM; i++) {
ec81b5ad 173 struct wil_tid_ampdu_rx *r;
ec81b5ad 174
bd33273b 175 spin_lock_bh(&sta->tid_rx_lock);
ec81b5ad
DL		 176
177 r = sta->tid_rx[i];
91886b0b
VK		 178 sta->tid_rx[i] = NULL;
179 wil_tid_ampdu_rx_free(wil, r);
ec81b5ad 180
bd33273b 181 spin_unlock_bh(&sta->tid_rx_lock);
91886b0b
VK		 182 }
183 for (i = 0; i < ARRAY_SIZE(wil->vring_tx); i++) {
184 if (wil->vring2cid_tid[i][0] == cid)
185 wil_vring_fini_tx(wil, i);
186 }
187 memset(&sta->stats, 0, sizeof(sta->stats));
188}
189
b516fcc5 190static void _wil6210_disconnect(struct wil6210_priv *wil, const u8 *bssid,
4821e6d8 191 u16 reason_code, bool from_event)
2be7d22f 192{
91886b0b 193 int cid = -ENOENT;
2be7d22f 194 struct net_device *ndev = wil_to_ndev(wil);
91886b0b
VK		 195 struct wireless_dev *wdev = wil->wdev;
196
197 might_sleep();
0916d9f2
ME		 198 wil_info(wil, "%s(bssid=%pM, reason=%d, ev%s)\n", __func__, bssid,
199 reason_code, from_event ? "+" : "-");
100106d7
VK		 200
201 /* Cases are:
202 * - disconnect single STA, still connected
203 * - disconnect single STA, already disconnected
204 * - disconnect all
205 *
68682b41 206 * For "disconnect all", there are 3 options:
100106d7 207 * - bssid == NULL
68682b41 208 * - bssid is broadcast address (ff:ff:ff:ff:ff:ff)
100106d7
VK		 209 * - bssid is our MAC address
210 */
68682b41
VK		 211 if (bssid && !is_broadcast_ether_addr(bssid) &&
212 !ether_addr_equal_unaligned(ndev->dev_addr, bssid)) {
91886b0b 213 cid = wil_find_cid(wil, bssid);
100106d7
VK		 214 wil_dbg_misc(wil, "Disconnect %pM, CID=%d, reason=%d\n",
215 bssid, cid, reason_code);
216 if (cid >= 0) /* disconnect 1 peer */
217 wil_disconnect_cid(wil, cid, reason_code, from_event);
218 } else { /* all */
219 wil_dbg_misc(wil, "Disconnect all\n");
91886b0b 220 for (cid = 0; cid < WIL6210_MAX_CID; cid++)
4821e6d8 221 wil_disconnect_cid(wil, cid, reason_code, from_event);
100106d7 222 }
91886b0b
VK		 223
224 /* link state */
225 switch (wdev->iftype) {
226 case NL80211_IFTYPE_STATION:
227 case NL80211_IFTYPE_P2P_CLIENT:
41d6b093 228 wil_bcast_fini(wil);
c5e96c91
DL		 229 netif_tx_stop_all_queues(ndev);
230 netif_carrier_off(ndev);
231
9419b6a2
VK		 232 if (test_bit(wil_status_fwconnected, wil->status)) {
233 clear_bit(wil_status_fwconnected, wil->status);
4821e6d8 234 cfg80211_disconnected(ndev, reason_code,
80279fb7 235 NULL, 0, false, GFP_KERNEL);
9419b6a2 236 } else if (test_bit(wil_status_fwconnecting, wil->status)) {
91886b0b
VK		 237 cfg80211_connect_result(ndev, bssid, NULL, 0, NULL, 0,
238 WLAN_STATUS_UNSPECIFIED_FAILURE,
239 GFP_KERNEL);
240 }
9419b6a2 241 clear_bit(wil_status_fwconnecting, wil->status);
91886b0b
VK		 242 break;
243 default:
91886b0b 244 break;
2be7d22f 245 }
2be7d22f
VK		 246}
247
248static void wil_disconnect_worker(struct work_struct *work)
249{
250 struct wil6210_priv *wil = container_of(work,
251 struct wil6210_priv, disconnect_worker);
252
097638a0 253 mutex_lock(&wil->mutex);
4821e6d8 254 _wil6210_disconnect(wil, NULL, WLAN_REASON_UNSPECIFIED, false);
097638a0 255 mutex_unlock(&wil->mutex);
2be7d22f
VK		 256}
257
258static void wil_connect_timer_fn(ulong x)
259{
260 struct wil6210_priv *wil = (void *)x;
0916d9f2 261 bool q;
2be7d22f 262
0916d9f2 263 wil_err(wil, "Connect timeout detected, disconnect station\n");
2be7d22f
VK		 264
265 /* reschedule to thread context - disconnect won't
0916d9f2
ME		 266 * run from atomic context.
267 * queue on wmi_wq to prevent race with connect event.
2be7d22f 268 */
0916d9f2
ME		 269 q = queue_work(wil->wmi_wq, &wil->disconnect_worker);
270 wil_dbg_wmi(wil, "queue_work of disconnect_worker -> %d\n", q);
2be7d22f
VK		 271}
272
047e5d74
VK		 273static void wil_scan_timer_fn(ulong x)
274{
275 struct wil6210_priv *wil = (void *)x;
276
9419b6a2 277 clear_bit(wil_status_fwready, wil->status);
047e5d74 278 wil_err(wil, "Scan timeout detected, start fw error recovery\n");
8ad6600f 279 wil_fw_error_recovery(wil);
047e5d74
VK		 280}
281
c33407a8
VK		 282static int wil_wait_for_recovery(struct wil6210_priv *wil)
283{
284 if (wait_event_interruptible(wil->wq, wil->recovery_state !=
285 fw_recovery_pending)) {
286 wil_err(wil, "Interrupt, canceling recovery\n");
287 return -ERESTARTSYS;
288 }
289 if (wil->recovery_state != fw_recovery_running) {
290 wil_info(wil, "Recovery cancelled\n");
291 return -EINTR;
292 }
293 wil_info(wil, "Proceed with recovery\n");
294 return 0;
295}
296
297void wil_set_recovery_state(struct wil6210_priv *wil, int state)
298{
299 wil_dbg_misc(wil, "%s(%d -> %d)\n", __func__,
300 wil->recovery_state, state);
301
302 wil->recovery_state = state;
303 wake_up_interruptible(&wil->wq);
304}
305
ed6f9dc6
VK		 306static void wil_fw_error_worker(struct work_struct *work)
307{
c33407a8
VK		 308 struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
309 fw_error_worker);
ed6f9dc6
VK		 310 struct wireless_dev *wdev = wil->wdev;
311
312 wil_dbg_misc(wil, "fw error worker\n");
313
cded9369
VK		 314 if (!netif_running(wil_to_ndev(wil))) {
315 wil_info(wil, "No recovery - interface is down\n");
316 return;
317 }
318
fc219eed
VK		 319 /* increment @recovery_count if less then WIL6210_FW_RECOVERY_TO
320 * passed since last recovery attempt
321 */
322 if (time_is_after_jiffies(wil->last_fw_recovery +
323 WIL6210_FW_RECOVERY_TO))
324 wil->recovery_count++;
325 else
326 wil->recovery_count = 1; /* fw was alive for a long time */
327
328 if (wil->recovery_count > WIL6210_FW_RECOVERY_RETRIES) {
329 wil_err(wil, "too many recovery attempts (%d), giving up\n",
330 wil->recovery_count);
331 return;
332 }
333
334 wil->last_fw_recovery = jiffies;
335
9c3bde56 336 mutex_lock(&wil->mutex);
ed6f9dc6
VK		 337 switch (wdev->iftype) {
338 case NL80211_IFTYPE_STATION:
339 case NL80211_IFTYPE_P2P_CLIENT:
340 case NL80211_IFTYPE_MONITOR:
c33407a8 341 wil_info(wil, "fw error recovery requested (try %d)...\n",
fc219eed 342 wil->recovery_count);
c33407a8
VK		 343 if (!no_fw_recovery)
344 wil->recovery_state = fw_recovery_running;
345 if (0 != wil_wait_for_recovery(wil))
346 break;
347
73d839ae
VK		 348 __wil_down(wil);
349 __wil_up(wil);
ed6f9dc6
VK		 350 break;
351 case NL80211_IFTYPE_AP:
352 case NL80211_IFTYPE_P2P_GO:
e240537b 353 wil_info(wil, "No recovery for AP-like interface\n");
ed6f9dc6
VK		 354 /* recovery in these modes is done by upper layers */
355 break;
356 default:
e240537b
VK		 357 wil_err(wil, "No recovery - unknown interface type %d\n",
358 wdev->iftype);
ed6f9dc6
VK		 359 break;
360 }
9c3bde56 361 mutex_unlock(&wil->mutex);
ed6f9dc6
VK		 362}
363
9a177384
VK		 364static int wil_find_free_vring(struct wil6210_priv *wil)
365{
366 int i;
8fe59627 367
9a177384
VK		 368 for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
369 if (!wil->vring_tx[i].va)
370 return i;
371 }
372 return -EINVAL;
373}
374
0916d9f2
ME		 375int wil_tx_init(struct wil6210_priv *wil, int cid)
376{
377 int rc = -EINVAL, ringid;
378
379 if (cid < 0) {
380 wil_err(wil, "No connection pending\n");
381 goto out;
382 }
383 ringid = wil_find_free_vring(wil);
384 if (ringid < 0) {
385 wil_err(wil, "No free vring found\n");
386 goto out;
387 }
388
389 wil_dbg_wmi(wil, "Configure for connection CID %d vring %d\n",
390 cid, ringid);
391
392 rc = wil_vring_init_tx(wil, ringid, 1 << tx_ring_order, cid, 0);
393 if (rc)
394 wil_err(wil, "wil_vring_init_tx for CID %d vring %d failed\n",
395 cid, ringid);
396
397out:
398 return rc;
399}
400
41d6b093
VK		 401int wil_bcast_init(struct wil6210_priv *wil)
402{
403 int ri = wil->bcast_vring, rc;
404
405 if ((ri >= 0) && wil->vring_tx[ri].va)
406 return 0;
407
408 ri = wil_find_free_vring(wil);
409 if (ri < 0)
410 return ri;
411
230d8442 412 wil->bcast_vring = ri;
41d6b093 413 rc = wil_vring_init_bcast(wil, ri, 1 << bcast_ring_order);
230d8442
VK		 414 if (rc)
415 wil->bcast_vring = -1;
41d6b093
VK		 416
417 return rc;
418}
419
420void wil_bcast_fini(struct wil6210_priv *wil)
421{
422 int ri = wil->bcast_vring;
423
424 if (ri < 0)
425 return;
426
427 wil->bcast_vring = -1;
428 wil_vring_fini_tx(wil, ri);
429}
430
2be7d22f
VK		 431int wil_priv_init(struct wil6210_priv *wil)
432{
ec81b5ad
DL		 433 uint i;
434
7743882d 435 wil_dbg_misc(wil, "%s()\n", __func__);
2be7d22f 436
3df2cd36 437 memset(wil->sta, 0, sizeof(wil->sta));
ec81b5ad
DL		 438 for (i = 0; i < WIL6210_MAX_CID; i++)
439 spin_lock_init(&wil->sta[i].tid_rx_lock);
3df2cd36 440
875e9439
ME		 441 for (i = 0; i < WIL6210_MAX_TX_RINGS; i++)
442 spin_lock_init(&wil->vring_tx_data[i].lock);
443
2be7d22f
VK		 444 mutex_init(&wil->mutex);
445 mutex_init(&wil->wmi_mutex);
3277213f 446 mutex_init(&wil->back_rx_mutex);
3a124ed6 447 mutex_init(&wil->back_tx_mutex);
40822a90 448 mutex_init(&wil->probe_client_mutex);
2be7d22f
VK		 449
450 init_completion(&wil->wmi_ready);
59502647 451 init_completion(&wil->wmi_call);
2be7d22f 452
41d6b093 453 wil->bcast_vring = -1;
2be7d22f 454 setup_timer(&wil->connect_timer, wil_connect_timer_fn, (ulong)wil);
047e5d74 455 setup_timer(&wil->scan_timer, wil_scan_timer_fn, (ulong)wil);
2be7d22f 456
2be7d22f
VK		 457 INIT_WORK(&wil->disconnect_worker, wil_disconnect_worker);
458 INIT_WORK(&wil->wmi_event_worker, wmi_event_worker);
ed6f9dc6 459 INIT_WORK(&wil->fw_error_worker, wil_fw_error_worker);
3277213f 460 INIT_WORK(&wil->back_rx_worker, wil_back_rx_worker);
3a124ed6 461 INIT_WORK(&wil->back_tx_worker, wil_back_tx_worker);
40822a90 462 INIT_WORK(&wil->probe_client_worker, wil_probe_client_worker);
2be7d22f
VK		 463
464 INIT_LIST_HEAD(&wil->pending_wmi_ev);
3277213f 465 INIT_LIST_HEAD(&wil->back_rx_pending);
3a124ed6 466 INIT_LIST_HEAD(&wil->back_tx_pending);
40822a90 467 INIT_LIST_HEAD(&wil->probe_client_pending);
2be7d22f 468 spin_lock_init(&wil->wmi_ev_lock);
c33407a8 469 init_waitqueue_head(&wil->wq);
2be7d22f 470
3277213f 471 wil->wmi_wq = create_singlethread_workqueue(WIL_NAME "_wmi");
2be7d22f
VK		 472 if (!wil->wmi_wq)
473 return -EAGAIN;
474
3277213f
VK		 475 wil->wq_service = create_singlethread_workqueue(WIL_NAME "_service");
476 if (!wil->wq_service)
477 goto out_wmi_wq;
2be7d22f 478
fc219eed 479 wil->last_fw_recovery = jiffies;
1f80af2e
VS		 480 wil->tx_interframe_timeout = WIL6210_ITR_TX_INTERFRAME_TIMEOUT_DEFAULT;
481 wil->rx_interframe_timeout = WIL6210_ITR_RX_INTERFRAME_TIMEOUT_DEFAULT;
482 wil->tx_max_burst_duration = WIL6210_ITR_TX_MAX_BURST_DURATION_DEFAULT;
483 wil->rx_max_burst_duration = WIL6210_ITR_RX_MAX_BURST_DURATION_DEFAULT;
fc219eed 484
ab954628
VK		 485 if (rx_ring_overflow_thrsh == WIL6210_RX_HIGH_TRSH_INIT)
486 rx_ring_overflow_thrsh = WIL6210_RX_HIGH_TRSH_DEFAULT;
2be7d22f 487 return 0;
3277213f
VK		 488
489out_wmi_wq:
490 destroy_workqueue(wil->wmi_wq);
491
492 return -EAGAIN;
2be7d22f
VK		 493}
494
b516fcc5
VK		 495/**
496 * wil6210_disconnect - disconnect one connection
497 * @wil: driver context
498 * @bssid: peer to disconnect, NULL to disconnect all
4821e6d8 499 * @reason_code: Reason code for the Disassociation frame
b516fcc5
VK		 500 * @from_event: whether is invoked from FW event handler
501 *
502 * Disconnect and release associated resources. If invoked not from the
503 * FW event handler, issue WMI command(s) to trigger MAC disconnect.
504 */
505void wil6210_disconnect(struct wil6210_priv *wil, const u8 *bssid,
4821e6d8 506 u16 reason_code, bool from_event)
2be7d22f 507{
9cf10d62
VK		 508 wil_dbg_misc(wil, "%s()\n", __func__);
509
2be7d22f 510 del_timer_sync(&wil->connect_timer);
4821e6d8 511 _wil6210_disconnect(wil, bssid, reason_code, from_event);
2be7d22f
VK		 512}
513
514void wil_priv_deinit(struct wil6210_priv *wil)
515{
9cf10d62
VK		 516 wil_dbg_misc(wil, "%s()\n", __func__);
517
c33407a8 518 wil_set_recovery_state(wil, fw_recovery_idle);
047e5d74 519 del_timer_sync(&wil->scan_timer);
2be7d22f 520 cancel_work_sync(&wil->disconnect_worker);
ed6f9dc6 521 cancel_work_sync(&wil->fw_error_worker);
097638a0 522 mutex_lock(&wil->mutex);
4821e6d8 523 wil6210_disconnect(wil, NULL, WLAN_REASON_DEAUTH_LEAVING, false);
097638a0 524 mutex_unlock(&wil->mutex);
2be7d22f 525 wmi_event_flush(wil);
3277213f
VK		 526 wil_back_rx_flush(wil);
527 cancel_work_sync(&wil->back_rx_worker);
3a124ed6
VK		 528 wil_back_tx_flush(wil);
529 cancel_work_sync(&wil->back_tx_worker);
40822a90
VK		 530 wil_probe_client_flush(wil);
531 cancel_work_sync(&wil->probe_client_worker);
3277213f 532 destroy_workqueue(wil->wq_service);
2be7d22f
VK		 533 destroy_workqueue(wil->wmi_wq);
534}
535
151a9706
VK		 536static inline void wil_halt_cpu(struct wil6210_priv *wil)
537{
b9eeb512
VK		 538 wil_w(wil, RGF_USER_USER_CPU_0, BIT_USER_USER_CPU_MAN_RST);
539 wil_w(wil, RGF_USER_MAC_CPU_0, BIT_USER_MAC_CPU_MAN_RST);
151a9706
VK		 540}
541
542static inline void wil_release_cpu(struct wil6210_priv *wil)
543{
544 /* Start CPU */
b9eeb512 545 wil_w(wil, RGF_USER_USER_CPU_0, 1);
151a9706
VK		 546}
547
bbb2adc7 548static int wil_target_reset(struct wil6210_priv *wil)
2be7d22f 549{
98a65b59 550 int delay = 0;
bb6c8dcc 551 u32 x, x1 = 0;
36b10a72 552
1aeda13b 553 wil_dbg_misc(wil, "Resetting \"%s\"...\n", wil->hw_name);
6508281b
VK		 554
555 /* Clear MAC link up */
b9eeb512
VK		 556 wil_s(wil, RGF_HP_CTRL, BIT(15));
557 wil_s(wil, RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT_HPAL_PERST_FROM_PAD);
558 wil_s(wil, RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT_CAR_PERST_RST);
151a9706
VK		 559
560 wil_halt_cpu(wil);
2be7d22f 561
2cd0f021 562 /* clear all boot loader "ready" bits */
b9eeb512
VK		 563 wil_w(wil, RGF_USER_BL +
564 offsetof(struct bl_dedicated_registers_v0, boot_loader_ready), 0);
cce47711 565 /* Clear Fw Download notification */
b9eeb512 566 wil_c(wil, RGF_USER_USAGE_6, BIT(0));
cce47711 567
b9eeb512 568 wil_s(wil, RGF_CAF_OSC_CONTROL, BIT_CAF_OSC_XTAL_EN);
9a5511b5
VK		 569 /* XTAL stabilization should take about 3ms */
570 usleep_range(5000, 7000);
b9eeb512 571 x = wil_r(wil, RGF_CAF_PLL_LOCK_STATUS);
9a5511b5
VK		 572 if (!(x & BIT_CAF_OSC_DIG_XTAL_STABLE)) {
573 wil_err(wil, "Xtal stabilization timeout\n"
574 "RGF_CAF_PLL_LOCK_STATUS = 0x%08x\n", x);
575 return -ETIME;
6508281b 576 }
9a5511b5 577 /* switch 10k to XTAL*/
b9eeb512 578 wil_c(wil, RGF_USER_SPARROW_M_4, BIT_SPARROW_M_4_SEL_SLEEP_OR_REF);
9a5511b5 579 /* 40 MHz */
b9eeb512 580 wil_c(wil, RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_CAR_AHB_SW_SEL);
9a5511b5 581
b9eeb512
VK		 582 wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x3ff81f);
583 wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_1, 0xf);
6508281b 584
b9eeb512
VK		 585 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0xFE000000);
586 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0x0000003F);
587 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x000000f0);
588 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0xFFE7FE00);
2be7d22f 589
b9eeb512
VK		 590 wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x0);
591 wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_1, 0x0);
6508281b 592
b9eeb512
VK		 593 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0);
594 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0);
595 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0);
596 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
2be7d22f 597
b9eeb512
VK		 598 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000003);
599 /* reset A2 PCIE AHB */
600 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00008000);
6508281b 601
b9eeb512 602 wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
2be7d22f 603
2cd0f021 604 /* wait until device ready. typical time is 20..80 msec */
36b10a72 605 do {
520d68e7 606 msleep(RST_DELAY);
b9eeb512
VK		 607 x = wil_r(wil, RGF_USER_BL +
608 offsetof(struct bl_dedicated_registers_v0,
609 boot_loader_ready));
bb6c8dcc
VK		 610 if (x1 != x) {
611 wil_dbg_misc(wil, "BL.ready 0x%08x => 0x%08x\n", x1, x);
612 x1 = x;
613 }
520d68e7 614 if (delay++ > RST_COUNT) {
2cd0f021 615 wil_err(wil, "Reset not completed, bl.ready 0x%08x\n",
48516298 616 x);
bbb2adc7 617 return -ETIME;
36b10a72 618 }
f1ad8c93 619 } while (x != BL_READY);
36b10a72 620
b9eeb512 621 wil_c(wil, RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_RST_PWGD);
972072aa 622
e3351277 623 /* enable fix for HW bug related to the SA/DA swap in AP Rx */
b9eeb512
VK		 624 wil_s(wil, RGF_DMA_OFUL_NID_0, BIT_DMA_OFUL_NID_0_RX_EXT_TR_EN |
625 BIT_DMA_OFUL_NID_0_RX_EXT_A3_SRC);
e3351277 626
520d68e7 627 wil_dbg_misc(wil, "Reset completed in %d ms\n", delay * RST_DELAY);
bbb2adc7 628 return 0;
151a9706 629}
2be7d22f 630
2be7d22f
VK		 631void wil_mbox_ring_le2cpus(struct wil6210_mbox_ring *r)
632{
633 le32_to_cpus(&r->base);
634 le16_to_cpus(&r->entry_size);
635 le16_to_cpus(&r->size);
636 le32_to_cpus(&r->tail);
637 le32_to_cpus(&r->head);
638}
639
2cd0f021
VK		 640static int wil_get_bl_info(struct wil6210_priv *wil)
641{
642 struct net_device *ndev = wil_to_ndev(wil);
f1ad8c93
VK		 643 union {
644 struct bl_dedicated_registers_v0 bl0;
645 struct bl_dedicated_registers_v1 bl1;
646 } bl;
647 u32 bl_ver;
648 u8 *mac;
649 u16 rf_status;
650
19c871ce
VK		 651 wil_memcpy_fromio_32(&bl, wil->csr + HOSTADDR(RGF_USER_BL),
652 sizeof(bl));
653 bl_ver = le32_to_cpu(bl.bl0.boot_loader_struct_version);
654 mac = bl.bl0.mac_address;
655
656 if (bl_ver == 0) {
f1ad8c93
VK		 657 le32_to_cpus(&bl.bl0.rf_type);
658 le32_to_cpus(&bl.bl0.baseband_type);
f1ad8c93
VK		 659 rf_status = 0; /* actually, unknown */
660 wil_info(wil,
661 "Boot Loader struct v%d: MAC = %pM RF = 0x%08x bband = 0x%08x\n",
662 bl_ver, mac,
663 bl.bl0.rf_type, bl.bl0.baseband_type);
664 wil_info(wil, "Boot Loader build unknown for struct v0\n");
19c871ce 665 } else {
f1ad8c93
VK		 666 le16_to_cpus(&bl.bl1.rf_type);
667 rf_status = le16_to_cpu(bl.bl1.rf_status);
668 le32_to_cpus(&bl.bl1.baseband_type);
669 le16_to_cpus(&bl.bl1.bl_version_subminor);
670 le16_to_cpus(&bl.bl1.bl_version_build);
f1ad8c93
VK		 671 wil_info(wil,
672 "Boot Loader struct v%d: MAC = %pM RF = 0x%04x (status 0x%04x) bband = 0x%08x\n",
673 bl_ver, mac,
674 bl.bl1.rf_type, rf_status,
675 bl.bl1.baseband_type);
676 wil_info(wil, "Boot Loader build %d.%d.%d.%d\n",
677 bl.bl1.bl_version_major, bl.bl1.bl_version_minor,
678 bl.bl1.bl_version_subminor, bl.bl1.bl_version_build);
f1ad8c93 679 }
2cd0f021 680
f1ad8c93
VK		 681 if (!is_valid_ether_addr(mac)) {
682 wil_err(wil, "BL: Invalid MAC %pM\n", mac);
2cd0f021
VK		 683 return -EINVAL;
684 }
685
f1ad8c93 686 ether_addr_copy(ndev->perm_addr, mac);
2cd0f021 687 if (!is_valid_ether_addr(ndev->dev_addr))
f1ad8c93
VK		 688 ether_addr_copy(ndev->dev_addr, mac);
689
690 if (rf_status) {/* bad RF cable? */
691 wil_err(wil, "RF communication error 0x%04x",
692 rf_status);
693 return -EAGAIN;
694 }
2cd0f021
VK		 695
696 return 0;
697}
698
409ead54
VK		 699static void wil_bl_crash_info(struct wil6210_priv *wil, bool is_err)
700{
701 u32 bl_assert_code, bl_assert_blink, bl_magic_number;
702 u32 bl_ver = wil_r(wil, RGF_USER_BL +
703 offsetof(struct bl_dedicated_registers_v0,
704 boot_loader_struct_version));
705
706 if (bl_ver < 2)
707 return;
708
709 bl_assert_code = wil_r(wil, RGF_USER_BL +
710 offsetof(struct bl_dedicated_registers_v1,
711 bl_assert_code));
712 bl_assert_blink = wil_r(wil, RGF_USER_BL +
713 offsetof(struct bl_dedicated_registers_v1,
714 bl_assert_blink));
715 bl_magic_number = wil_r(wil, RGF_USER_BL +
716 offsetof(struct bl_dedicated_registers_v1,
717 bl_magic_number));
718
719 if (is_err) {
720 wil_err(wil,
721 "BL assert code 0x%08x blink 0x%08x magic 0x%08x\n",
722 bl_assert_code, bl_assert_blink, bl_magic_number);
723 } else {
724 wil_dbg_misc(wil,
725 "BL assert code 0x%08x blink 0x%08x magic 0x%08x\n",
726 bl_assert_code, bl_assert_blink, bl_magic_number);
727 }
728}
729
2be7d22f
VK		 730static int wil_wait_for_fw_ready(struct wil6210_priv *wil)
731{
732 ulong to = msecs_to_jiffies(1000);
733 ulong left = wait_for_completion_timeout(&wil->wmi_ready, to);
8fe59627 734
2be7d22f
VK		 735 if (0 == left) {
736 wil_err(wil, "Firmware not ready\n");
737 return -ETIME;
738 } else {
15e23124
VK		 739 wil_info(wil, "FW ready after %d ms. HW version 0x%08x\n",
740 jiffies_to_msecs(to-left), wil->hw_version);
2be7d22f
VK		 741 }
742 return 0;
743}
744
745/*
746 * We reset all the structures, and we reset the UMAC.
747 * After calling this routine, you're expected to reload
748 * the firmware.
749 */
2cd0f021 750int wil_reset(struct wil6210_priv *wil, bool load_fw)
2be7d22f
VK		 751{
752 int rc;
753
9cf10d62
VK		 754 wil_dbg_misc(wil, "%s()\n", __func__);
755
097638a0 756 WARN_ON(!mutex_is_locked(&wil->mutex));
9419b6a2 757 WARN_ON(test_bit(wil_status_napi_en, wil->status));
097638a0 758
bfc2dc7a
VK		 759 if (debug_fw) {
760 static const u8 mac[ETH_ALEN] = {
761 0x00, 0xde, 0xad, 0x12, 0x34, 0x56,
762 };
763 struct net_device *ndev = wil_to_ndev(wil);
764
765 ether_addr_copy(ndev->perm_addr, mac);
766 ether_addr_copy(ndev->dev_addr, ndev->perm_addr);
767 return 0;
768 }
769
67131a1d
VK		 770 if (wil->hw_version == HW_VER_UNKNOWN)
771 return -ENODEV;
772
f13e0630
HK		 773 set_bit(wil_status_resetting, wil->status);
774
097638a0 775 cancel_work_sync(&wil->disconnect_worker);
4821e6d8 776 wil6210_disconnect(wil, NULL, WLAN_REASON_DEAUTH_LEAVING, false);
41d6b093 777 wil_bcast_fini(wil);
097638a0 778
452133a7
ME		 779 /* prevent NAPI from being scheduled and prevent wmi commands */
780 mutex_lock(&wil->wmi_mutex);
9419b6a2 781 bitmap_zero(wil->status, wil_status_last);
452133a7 782 mutex_unlock(&wil->wmi_mutex);
0fef1818 783
ed6f9dc6
VK		 784 if (wil->scan_request) {
785 wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
786 wil->scan_request);
047e5d74 787 del_timer_sync(&wil->scan_timer);
ed6f9dc6
VK		 788 cfg80211_scan_done(wil->scan_request, true);
789 wil->scan_request = NULL;
790 }
791
e4dbb093 792 wil_mask_irq(wil);
e08b5906 793
2be7d22f
VK		 794 wmi_event_flush(wil);
795
3277213f 796 flush_workqueue(wil->wq_service);
e08b5906 797 flush_workqueue(wil->wmi_wq);
2be7d22f 798
409ead54 799 wil_bl_crash_info(wil, false);
bbb2adc7 800 rc = wil_target_reset(wil);
8bf6adb9 801 wil_rx_fini(wil);
409ead54
VK		 802 if (rc) {
803 wil_bl_crash_info(wil, true);
bbb2adc7 804 return rc;
409ead54 805 }
bbb2adc7 806
2cd0f021 807 rc = wil_get_bl_info(wil);
f1ad8c93
VK		 808 if (rc == -EAGAIN && !load_fw) /* ignore RF error if not going up */
809 rc = 0;
2cd0f021
VK		 810 if (rc)
811 return rc;
812
813 if (load_fw) {
814 wil_info(wil, "Use firmware <%s> + board <%s>\n", WIL_FW_NAME,
815 WIL_FW2_NAME);
816
151a9706
VK		 817 wil_halt_cpu(wil);
818 /* Loading f/w from the file */
819 rc = wil_request_firmware(wil, WIL_FW_NAME);
820 if (rc)
821 return rc;
2cd0f021
VK		 822 rc = wil_request_firmware(wil, WIL_FW2_NAME);
823 if (rc)
824 return rc;
825
826 /* Mark FW as loaded from host */
b9eeb512 827 wil_s(wil, RGF_USER_USAGE_6, 1);
151a9706 828
2cd0f021
VK		 829 /* clear any interrupts which on-card-firmware
830 * may have set
831 */
151a9706 832 wil6210_clear_irq(wil);
2cd0f021
VK		 833 /* CAF_ICR - clear and mask */
834 /* it is W1C, clear by writing back same value */
b9eeb512
VK		 835 wil_s(wil, RGF_CAF_ICR + offsetof(struct RGF_ICR, ICR), 0);
836 wil_w(wil, RGF_CAF_ICR + offsetof(struct RGF_ICR, IMV), ~0);
2cd0f021 837
151a9706 838 wil_release_cpu(wil);
151a9706 839 }
8bf6adb9 840
2be7d22f 841 /* init after reset */
02beaf1a 842 wil->ap_isolate = 0;
16735d02 843 reinit_completion(&wil->wmi_ready);
59502647 844 reinit_completion(&wil->wmi_call);
2be7d22f 845
2cd0f021
VK		 846 if (load_fw) {
847 wil_configure_interrupt_moderation(wil);
848 wil_unmask_irq(wil);
2be7d22f 849
2cd0f021
VK		 850 /* we just started MAC, wait for FW ready */
851 rc = wil_wait_for_fw_ready(wil);
cec94d8c
VK		 852 if (rc == 0) /* check FW is responsive */
853 rc = wmi_echo(wil);
2cd0f021 854 }
2be7d22f
VK		 855
856 return rc;
857}
858
ed6f9dc6
VK		 859void wil_fw_error_recovery(struct wil6210_priv *wil)
860{
861 wil_dbg_misc(wil, "starting fw error recovery\n");
f13e0630
HK		 862
863 if (test_bit(wil_status_resetting, wil->status)) {
864 wil_info(wil, "Reset already in progress\n");
865 return;
866 }
867
c33407a8 868 wil->recovery_state = fw_recovery_pending;
ed6f9dc6
VK		 869 schedule_work(&wil->fw_error_worker);
870}
2be7d22f 871
73d839ae 872int __wil_up(struct wil6210_priv *wil)
2be7d22f
VK		 873{
874 struct net_device *ndev = wil_to_ndev(wil);
875 struct wireless_dev *wdev = wil->wdev;
2be7d22f 876 int rc;
2be7d22f 877
097638a0
VK		 878 WARN_ON(!mutex_is_locked(&wil->mutex));
879
2cd0f021 880 rc = wil_reset(wil, true);
2be7d22f
VK		 881 if (rc)
882 return rc;
883
e31b2562 884 /* Rx VRING. After MAC and beacon */
d3762b40 885 rc = wil_rx_init(wil, 1 << rx_ring_order);
e31b2562
VK		 886 if (rc)
887 return rc;
888
2be7d22f
VK		 889 switch (wdev->iftype) {
890 case NL80211_IFTYPE_STATION:
7743882d 891 wil_dbg_misc(wil, "type: STATION\n");
2be7d22f
VK		 892 ndev->type = ARPHRD_ETHER;
893 break;
894 case NL80211_IFTYPE_AP:
7743882d 895 wil_dbg_misc(wil, "type: AP\n");
2be7d22f
VK		 896 ndev->type = ARPHRD_ETHER;
897 break;
898 case NL80211_IFTYPE_P2P_CLIENT:
7743882d 899 wil_dbg_misc(wil, "type: P2P_CLIENT\n");
2be7d22f
VK		 900 ndev->type = ARPHRD_ETHER;
901 break;
902 case NL80211_IFTYPE_P2P_GO:
7743882d 903 wil_dbg_misc(wil, "type: P2P_GO\n");
2be7d22f
VK		 904 ndev->type = ARPHRD_ETHER;
905 break;
906 case NL80211_IFTYPE_MONITOR:
7743882d 907 wil_dbg_misc(wil, "type: Monitor\n");
2be7d22f
VK		 908 ndev->type = ARPHRD_IEEE80211_RADIOTAP;
909 /* ARPHRD_IEEE80211 or ARPHRD_IEEE80211_RADIOTAP ? */
910 break;
911 default:
912 return -EOPNOTSUPP;
913 }
914
2be7d22f
VK		 915 /* MAC address - pre-requisite for other commands */
916 wmi_set_mac_address(wil, ndev->dev_addr);
917
73d839ae 918 wil_dbg_misc(wil, "NAPI enable\n");
e0287c4a
VK		 919 napi_enable(&wil->napi_rx);
920 napi_enable(&wil->napi_tx);
9419b6a2 921 set_bit(wil_status_napi_en, wil->status);
e0287c4a 922
f772ebfb
VK		 923 if (wil->platform_ops.bus_request)
924 wil->platform_ops.bus_request(wil->platform_handle,
925 WIL_MAX_BUS_REQUEST_KBPS);
926
2be7d22f
VK		 927 return 0;
928}
929
930int wil_up(struct wil6210_priv *wil)
931{
932 int rc;
933
9cf10d62
VK		 934 wil_dbg_misc(wil, "%s()\n", __func__);
935
2be7d22f
VK		 936 mutex_lock(&wil->mutex);
937 rc = __wil_up(wil);
938 mutex_unlock(&wil->mutex);
939
940 return rc;
941}
942
73d839ae 943int __wil_down(struct wil6210_priv *wil)
2be7d22f 944{
f172b563
DL		 945 int iter = WAIT_FOR_DISCONNECT_TIMEOUT_MS /
946 WAIT_FOR_DISCONNECT_INTERVAL_MS;
947
097638a0
VK		 948 WARN_ON(!mutex_is_locked(&wil->mutex));
949
f772ebfb
VK		 950 if (wil->platform_ops.bus_request)
951 wil->platform_ops.bus_request(wil->platform_handle, 0);
952
73d839ae 953 wil_disable_irq(wil);
9419b6a2 954 if (test_and_clear_bit(wil_status_napi_en, wil->status)) {
73d839ae
VK		 955 napi_disable(&wil->napi_rx);
956 napi_disable(&wil->napi_tx);
957 wil_dbg_misc(wil, "NAPI disable\n");
958 }
959 wil_enable_irq(wil);
e0287c4a 960
2be7d22f 961 if (wil->scan_request) {
2a91d7d0
VK		 962 wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
963 wil->scan_request);
047e5d74 964 del_timer_sync(&wil->scan_timer);
2be7d22f
VK		 965 cfg80211_scan_done(wil->scan_request, true);
966 wil->scan_request = NULL;
967 }
968
9419b6a2
VK		 969 if (test_bit(wil_status_fwconnected, wil->status) ||
970 test_bit(wil_status_fwconnecting, wil->status))
f172b563
DL		 971 wmi_send(wil, WMI_DISCONNECT_CMDID, NULL, 0);
972
973 /* make sure wil is idle (not connected) */
974 mutex_unlock(&wil->mutex);
975 while (iter--) {
9419b6a2
VK		 976 int idle = !test_bit(wil_status_fwconnected, wil->status) &&
977 !test_bit(wil_status_fwconnecting, wil->status);
f172b563
DL		 978 if (idle)
979 break;
980 msleep(WAIT_FOR_DISCONNECT_INTERVAL_MS);
981 }
982 mutex_lock(&wil->mutex);
983
f94c48d6 984 if (iter < 0)
f172b563
DL		 985 wil_err(wil, "timeout waiting for idle FW/HW\n");
986
2cd0f021 987 wil_reset(wil, false);
2be7d22f
VK		 988
989 return 0;
990}
991
992int wil_down(struct wil6210_priv *wil)
993{
994 int rc;
995
9cf10d62
VK		 996 wil_dbg_misc(wil, "%s()\n", __func__);
997
c33407a8 998 wil_set_recovery_state(wil, fw_recovery_idle);
2be7d22f
VK		 999 mutex_lock(&wil->mutex);
1000 rc = __wil_down(wil);
1001 mutex_unlock(&wil->mutex);
1002
1003 return rc;
1004}
3df2cd36
VK		 1005
1006int wil_find_cid(struct wil6210_priv *wil, const u8 *mac)
1007{
1008 int i;
1009 int rc = -ENOENT;
1010
1011 for (i = 0; i < ARRAY_SIZE(wil->sta); i++) {
1012 if ((wil->sta[i].status != wil_sta_unused) &&
108d1eb6 1013 ether_addr_equal(wil->sta[i].addr, mac)) {
3df2cd36
VK		 1014 rc = i;
1015 break;
1016 }
1017 }
1018
1019 return rc;
1020}
Linux kernel - Deliverables
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