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         if (unlikely(!ndev))
 236                 return;
 237
 238         might_sleep();
 239         wil_info(wil, "%s(bssid=%pM, reason=%d, ev%s)\n", __func__, bssid,
 240                  reason_code, from_event ? "+" : "-");
 241
 242         /* Cases are:
 243          * - disconnect single STA, still connected
 244          * - disconnect single STA, already disconnected
 245          * - disconnect all
 246          *
 247          * For "disconnect all", there are 3 options:
 248          * - bssid == NULL
 249          * - bssid is broadcast address (ff:ff:ff:ff:ff:ff)
 250          * - bssid is our MAC address
 251          */
 252         if (bssid && !is_broadcast_ether_addr(bssid) &&
 253             !ether_addr_equal_unaligned(ndev->dev_addr, bssid)) {
 254                 cid = wil_find_cid(wil, bssid);
 255                 wil_dbg_misc(wil, "Disconnect %pM, CID=%d, reason=%d\n",
 256                              bssid, cid, reason_code);
 257                 if (cid >= 0) /* disconnect 1 peer */
 258                         wil_disconnect_cid(wil, cid, reason_code, from_event);
 259         } else { /* all */
 260                 wil_dbg_misc(wil, "Disconnect all\n");
 261                 for (cid = 0; cid < WIL6210_MAX_CID; cid++)
 262                         wil_disconnect_cid(wil, cid, reason_code, from_event);
 263         }
 264
 265         /* link state */
 266         switch (wdev->iftype) {
 267         case NL80211_IFTYPE_STATION:
 268         case NL80211_IFTYPE_P2P_CLIENT:
 269                 wil_bcast_fini(wil);
 270                 netif_tx_stop_all_queues(ndev);
 271                 netif_carrier_off(ndev);
 272
 273                 if (test_bit(wil_status_fwconnected, wil->status)) {
 274                         clear_bit(wil_status_fwconnected, wil->status);
 275                         cfg80211_disconnected(ndev, reason_code,
 276                                               NULL, 0, false, GFP_KERNEL);
 277                 } else if (test_bit(wil_status_fwconnecting, wil->status)) {
 278                         cfg80211_connect_result(ndev, bssid, NULL, 0, NULL, 0,
 279                                                 WLAN_STATUS_UNSPECIFIED_FAILURE,
 280                                                 GFP_KERNEL);
 281                 }
 282                 clear_bit(wil_status_fwconnecting, wil->status);
 283                 break;
 284         case NL80211_IFTYPE_AP:
 285         case NL80211_IFTYPE_P2P_GO:
 286                 if (!wil_ap_is_connected(wil))
 287                         clear_bit(wil_status_fwconnected, wil->status);
 288                 break;
 289         default:
 290                 break;
 291         }
 292 }
 293
 294 static void wil_disconnect_worker(struct work_struct *work)
 295 {
 296         struct wil6210_priv *wil = container_of(work,
 297                         struct wil6210_priv, disconnect_worker);
 298
 299         mutex_lock(&wil->mutex);
 300         _wil6210_disconnect(wil, NULL, WLAN_REASON_UNSPECIFIED, false);
 301         mutex_unlock(&wil->mutex);
 302 }
 303
 304 static void wil_connect_timer_fn(ulong x)
 305 {
 306         struct wil6210_priv *wil = (void *)x;
 307         bool q;
 308
 309         wil_err(wil, "Connect timeout detected, disconnect station\n");
 310
 311         /* reschedule to thread context - disconnect won't
 312          * run from atomic context.
 313          * queue on wmi_wq to prevent race with connect event.
 314          */
 315         q = queue_work(wil->wmi_wq, &wil->disconnect_worker);
 316         wil_dbg_wmi(wil, "queue_work of disconnect_worker -> %d\n", q);
 317 }
 318
 319 static void wil_scan_timer_fn(ulong x)
 320 {
 321         struct wil6210_priv *wil = (void *)x;
 322
 323         clear_bit(wil_status_fwready, wil->status);
 324         wil_err(wil, "Scan timeout detected, start fw error recovery\n");
 325         wil_fw_error_recovery(wil);
 326 }
 327
 328 static int wil_wait_for_recovery(struct wil6210_priv *wil)
 329 {
 330         if (wait_event_interruptible(wil->wq, wil->recovery_state !=
 331                                      fw_recovery_pending)) {
 332                 wil_err(wil, "Interrupt, canceling recovery\n");
 333                 return -ERESTARTSYS;
 334         }
 335         if (wil->recovery_state != fw_recovery_running) {
 336                 wil_info(wil, "Recovery cancelled\n");
 337                 return -EINTR;
 338         }
 339         wil_info(wil, "Proceed with recovery\n");
 340         return 0;
 341 }
 342
 343 void wil_set_recovery_state(struct wil6210_priv *wil, int state)
 344 {
 345         wil_dbg_misc(wil, "%s(%d -> %d)\n", __func__,
 346                      wil->recovery_state, state);
 347
 348         wil->recovery_state = state;
 349         wake_up_interruptible(&wil->wq);
 350 }
 351
 352 bool wil_is_recovery_blocked(struct wil6210_priv *wil)
 353 {
 354         return no_fw_recovery && (wil->recovery_state == fw_recovery_pending);
 355 }
 356
 357 static void wil_fw_error_worker(struct work_struct *work)
 358 {
 359         struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
 360                                                 fw_error_worker);
 361         struct wireless_dev *wdev = wil->wdev;
 362
 363         wil_dbg_misc(wil, "fw error worker\n");
 364
 365         if (!netif_running(wil_to_ndev(wil))) {
 366                 wil_info(wil, "No recovery - interface is down\n");
 367                 return;
 368         }
 369
 370         /* increment @recovery_count if less then WIL6210_FW_RECOVERY_TO
 371          * passed since last recovery attempt
 372          */
 373         if (time_is_after_jiffies(wil->last_fw_recovery +
 374                                   WIL6210_FW_RECOVERY_TO))
 375                 wil->recovery_count++;
 376         else
 377                 wil->recovery_count = 1; /* fw was alive for a long time */
 378
 379         if (wil->recovery_count > WIL6210_FW_RECOVERY_RETRIES) {
 380                 wil_err(wil, "too many recovery attempts (%d), giving up\n",
 381                         wil->recovery_count);
 382                 return;
 383         }
 384
 385         wil->last_fw_recovery = jiffies;
 386
 387         mutex_lock(&wil->mutex);
 388         switch (wdev->iftype) {
 389         case NL80211_IFTYPE_STATION:
 390         case NL80211_IFTYPE_P2P_CLIENT:
 391         case NL80211_IFTYPE_MONITOR:
 392                 wil_info(wil, "fw error recovery requested (try %d)...\n",
 393                          wil->recovery_count);
 394                 if (!no_fw_recovery)
 395                         wil->recovery_state = fw_recovery_running;
 396                 if (0 != wil_wait_for_recovery(wil))
 397                         break;
 398
 399                 __wil_down(wil);
 400                 __wil_up(wil);
 401                 break;
 402         case NL80211_IFTYPE_AP:
 403         case NL80211_IFTYPE_P2P_GO:
 404                 wil_info(wil, "No recovery for AP-like interface\n");
 405                 /* recovery in these modes is done by upper layers */
 406                 break;
 407         default:
 408                 wil_err(wil, "No recovery - unknown interface type %d\n",
 409                         wdev->iftype);
 410                 break;
 411         }
 412         mutex_unlock(&wil->mutex);
 413 }
 414
 415 static int wil_find_free_vring(struct wil6210_priv *wil)
 416 {
 417         int i;
 418
 419         for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
 420                 if (!wil->vring_tx[i].va)
 421                         return i;
 422         }
 423         return -EINVAL;
 424 }
 425
 426 int wil_tx_init(struct wil6210_priv *wil, int cid)
 427 {
 428         int rc = -EINVAL, ringid;
 429
 430         if (cid < 0) {
 431                 wil_err(wil, "No connection pending\n");
 432                 goto out;
 433         }
 434         ringid = wil_find_free_vring(wil);
 435         if (ringid < 0) {
 436                 wil_err(wil, "No free vring found\n");
 437                 goto out;
 438         }
 439
 440         wil_dbg_wmi(wil, "Configure for connection CID %d vring %d\n",
 441                     cid, ringid);
 442
 443         rc = wil_vring_init_tx(wil, ringid, 1 << tx_ring_order, cid, 0);
 444         if (rc)
 445                 wil_err(wil, "wil_vring_init_tx for CID %d vring %d failed\n",
 446                         cid, ringid);
 447
 448 out:
 449         return rc;
 450 }
 451
 452 int wil_bcast_init(struct wil6210_priv *wil)
 453 {
 454         int ri = wil->bcast_vring, rc;
 455
 456         if ((ri >= 0) && wil->vring_tx[ri].va)
 457                 return 0;
 458
 459         ri = wil_find_free_vring(wil);
 460         if (ri < 0)
 461                 return ri;
 462
 463         wil->bcast_vring = ri;
 464         rc = wil_vring_init_bcast(wil, ri, 1 << bcast_ring_order);
 465         if (rc)
 466                 wil->bcast_vring = -1;
 467
 468         return rc;
 469 }
 470
 471 void wil_bcast_fini(struct wil6210_priv *wil)
 472 {
 473         int ri = wil->bcast_vring;
 474
 475         if (ri < 0)
 476                 return;
 477
 478         wil->bcast_vring = -1;
 479         wil_vring_fini_tx(wil, ri);
 480 }
 481
 482 int wil_priv_init(struct wil6210_priv *wil)
 483 {
 484         uint i;
 485
 486         wil_dbg_misc(wil, "%s()\n", __func__);
 487
 488         memset(wil->sta, 0, sizeof(wil->sta));
 489         for (i = 0; i < WIL6210_MAX_CID; i++)
 490                 spin_lock_init(&wil->sta[i].tid_rx_lock);
 491
 492         for (i = 0; i < WIL6210_MAX_TX_RINGS; i++)
 493                 spin_lock_init(&wil->vring_tx_data[i].lock);
 494
 495         mutex_init(&wil->mutex);
 496         mutex_init(&wil->wmi_mutex);
 497         mutex_init(&wil->probe_client_mutex);
 498         mutex_init(&wil->p2p_wdev_mutex);
 499         mutex_init(&wil->halp.lock);
 500
 501         init_completion(&wil->wmi_ready);
 502         init_completion(&wil->wmi_call);
 503         init_completion(&wil->halp.comp);
 504
 505         wil->bcast_vring = -1;
 506         setup_timer(&wil->connect_timer, wil_connect_timer_fn, (ulong)wil);
 507         setup_timer(&wil->scan_timer, wil_scan_timer_fn, (ulong)wil);
 508         setup_timer(&wil->p2p.discovery_timer, wil_p2p_discovery_timer_fn,
 509                     (ulong)wil);
 510
 511         INIT_WORK(&wil->disconnect_worker, wil_disconnect_worker);
 512         INIT_WORK(&wil->wmi_event_worker, wmi_event_worker);
 513         INIT_WORK(&wil->fw_error_worker, wil_fw_error_worker);
 514         INIT_WORK(&wil->probe_client_worker, wil_probe_client_worker);
 515
 516         INIT_LIST_HEAD(&wil->pending_wmi_ev);
 517         INIT_LIST_HEAD(&wil->probe_client_pending);
 518         spin_lock_init(&wil->wmi_ev_lock);
 519         init_waitqueue_head(&wil->wq);
 520
 521         wil->wmi_wq = create_singlethread_workqueue(WIL_NAME "_wmi");
 522         if (!wil->wmi_wq)
 523                 return -EAGAIN;
 524
 525         wil->wq_service = create_singlethread_workqueue(WIL_NAME "_service");
 526         if (!wil->wq_service)
 527                 goto out_wmi_wq;
 528
 529         wil->last_fw_recovery = jiffies;
 530         wil->tx_interframe_timeout = WIL6210_ITR_TX_INTERFRAME_TIMEOUT_DEFAULT;
 531         wil->rx_interframe_timeout = WIL6210_ITR_RX_INTERFRAME_TIMEOUT_DEFAULT;
 532         wil->tx_max_burst_duration = WIL6210_ITR_TX_MAX_BURST_DURATION_DEFAULT;
 533         wil->rx_max_burst_duration = WIL6210_ITR_RX_MAX_BURST_DURATION_DEFAULT;
 534
 535         if (rx_ring_overflow_thrsh == WIL6210_RX_HIGH_TRSH_INIT)
 536                 rx_ring_overflow_thrsh = WIL6210_RX_HIGH_TRSH_DEFAULT;
 537         return 0;
 538
 539 out_wmi_wq:
 540         destroy_workqueue(wil->wmi_wq);
 541
 542         return -EAGAIN;
 543 }
 544
 545 /**
 546  * wil6210_disconnect - disconnect one connection
 547  * @wil: driver context
 548  * @bssid: peer to disconnect, NULL to disconnect all
 549  * @reason_code: Reason code for the Disassociation frame
 550  * @from_event: whether is invoked from FW event handler
 551  *
 552  * Disconnect and release associated resources. If invoked not from the
 553  * FW event handler, issue WMI command(s) to trigger MAC disconnect.
 554  */
 555 void wil6210_disconnect(struct wil6210_priv *wil, const u8 *bssid,
 556                         u16 reason_code, bool from_event)
 557 {
 558         wil_dbg_misc(wil, "%s()\n", __func__);
 559
 560         del_timer_sync(&wil->connect_timer);
 561         _wil6210_disconnect(wil, bssid, reason_code, from_event);
 562 }
 563
 564 void wil_priv_deinit(struct wil6210_priv *wil)
 565 {
 566         wil_dbg_misc(wil, "%s()\n", __func__);
 567
 568         wil_set_recovery_state(wil, fw_recovery_idle);
 569         del_timer_sync(&wil->scan_timer);
 570         del_timer_sync(&wil->p2p.discovery_timer);
 571         cancel_work_sync(&wil->disconnect_worker);
 572         cancel_work_sync(&wil->fw_error_worker);
 573         cancel_work_sync(&wil->p2p.discovery_expired_work);
 574         mutex_lock(&wil->mutex);
 575         wil6210_disconnect(wil, NULL, WLAN_REASON_DEAUTH_LEAVING, false);
 576         mutex_unlock(&wil->mutex);
 577         wmi_event_flush(wil);
 578         wil_probe_client_flush(wil);
 579         cancel_work_sync(&wil->probe_client_worker);
 580         destroy_workqueue(wil->wq_service);
 581         destroy_workqueue(wil->wmi_wq);
 582 }
 583
 584 static inline void wil_halt_cpu(struct wil6210_priv *wil)
 585 {
 586         wil_w(wil, RGF_USER_USER_CPU_0, BIT_USER_USER_CPU_MAN_RST);
 587         wil_w(wil, RGF_USER_MAC_CPU_0,  BIT_USER_MAC_CPU_MAN_RST);
 588 }
 589
 590 static inline void wil_release_cpu(struct wil6210_priv *wil)
 591 {
 592         /* Start CPU */
 593         wil_w(wil, RGF_USER_USER_CPU_0, 1);
 594 }
 595
 596 static void wil_set_oob_mode(struct wil6210_priv *wil, bool enable)
 597 {
 598         wil_info(wil, "%s: enable=%d\n", __func__, enable);
 599         if (enable)
 600                 wil_s(wil, RGF_USER_USAGE_6, BIT_USER_OOB_MODE);
 601         else
 602                 wil_c(wil, RGF_USER_USAGE_6, BIT_USER_OOB_MODE);
 603 }
 604
 605 static int wil_target_reset(struct wil6210_priv *wil)
 606 {
 607         int delay = 0;
 608         u32 x, x1 = 0;
 609
 610         wil_dbg_misc(wil, "Resetting \"%s\"...\n", wil->hw_name);
 611
 612         /* Clear MAC link up */
 613         wil_s(wil, RGF_HP_CTRL, BIT(15));
 614         wil_s(wil, RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT_HPAL_PERST_FROM_PAD);
 615         wil_s(wil, RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT_CAR_PERST_RST);
 616
 617         wil_halt_cpu(wil);
 618
 619         /* clear all boot loader "ready" bits */
 620         wil_w(wil, RGF_USER_BL +
 621               offsetof(struct bl_dedicated_registers_v0, boot_loader_ready), 0);
 622         /* Clear Fw Download notification */
 623         wil_c(wil, RGF_USER_USAGE_6, BIT(0));
 624
 625         wil_s(wil, RGF_CAF_OSC_CONTROL, BIT_CAF_OSC_XTAL_EN);
 626         /* XTAL stabilization should take about 3ms */
 627         usleep_range(5000, 7000);
 628         x = wil_r(wil, RGF_CAF_PLL_LOCK_STATUS);
 629         if (!(x & BIT_CAF_OSC_DIG_XTAL_STABLE)) {
 630                 wil_err(wil, "Xtal stabilization timeout\n"
 631                         "RGF_CAF_PLL_LOCK_STATUS = 0x%08x\n", x);
 632                 return -ETIME;
 633         }
 634         /* switch 10k to XTAL*/
 635         wil_c(wil, RGF_USER_SPARROW_M_4, BIT_SPARROW_M_4_SEL_SLEEP_OR_REF);
 636         /* 40 MHz */
 637         wil_c(wil, RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_CAR_AHB_SW_SEL);
 638
 639         wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x3ff81f);
 640         wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_1, 0xf);
 641
 642         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0xFE000000);
 643         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0x0000003F);
 644         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x000000f0);
 645         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0xFFE7FE00);
 646
 647         wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x0);
 648         wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_1, 0x0);
 649
 650         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0);
 651         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0);
 652         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0);
 653         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
 654
 655         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000003);
 656         /* reset A2 PCIE AHB */
 657         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00008000);
 658
 659         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
 660
 661         /* wait until device ready. typical time is 20..80 msec */
 662         do {
 663                 msleep(RST_DELAY);
 664                 x = wil_r(wil, RGF_USER_BL +
 665                           offsetof(struct bl_dedicated_registers_v0,
 666                                    boot_loader_ready));
 667                 if (x1 != x) {
 668                         wil_dbg_misc(wil, "BL.ready 0x%08x => 0x%08x\n", x1, x);
 669                         x1 = x;
 670                 }
 671                 if (delay++ > RST_COUNT) {
 672                         wil_err(wil, "Reset not completed, bl.ready 0x%08x\n",
 673                                 x);
 674                         return -ETIME;
 675                 }
 676         } while (x != BL_READY);
 677
 678         wil_c(wil, RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_RST_PWGD);
 679
 680         /* enable fix for HW bug related to the SA/DA swap in AP Rx */
 681         wil_s(wil, RGF_DMA_OFUL_NID_0, BIT_DMA_OFUL_NID_0_RX_EXT_TR_EN |
 682               BIT_DMA_OFUL_NID_0_RX_EXT_A3_SRC);
 683
 684         wil_dbg_misc(wil, "Reset completed in %d ms\n", delay * RST_DELAY);
 685         return 0;
 686 }
 687
 688 void wil_mbox_ring_le2cpus(struct wil6210_mbox_ring *r)
 689 {
 690         le32_to_cpus(&r->base);
 691         le16_to_cpus(&r->entry_size);
 692         le16_to_cpus(&r->size);
 693         le32_to_cpus(&r->tail);
 694         le32_to_cpus(&r->head);
 695 }
 696
 697 static int wil_get_bl_info(struct wil6210_priv *wil)
 698 {
 699         struct net_device *ndev = wil_to_ndev(wil);
 700         struct wiphy *wiphy = wil_to_wiphy(wil);
 701         union {
 702                 struct bl_dedicated_registers_v0 bl0;
 703                 struct bl_dedicated_registers_v1 bl1;
 704         } bl;
 705         u32 bl_ver;
 706         u8 *mac;
 707         u16 rf_status;
 708
 709         wil_memcpy_fromio_32(&bl, wil->csr + HOSTADDR(RGF_USER_BL),
 710                              sizeof(bl));
 711         bl_ver = le32_to_cpu(bl.bl0.boot_loader_struct_version);
 712         mac = bl.bl0.mac_address;
 713
 714         if (bl_ver == 0) {
 715                 le32_to_cpus(&bl.bl0.rf_type);
 716                 le32_to_cpus(&bl.bl0.baseband_type);
 717                 rf_status = 0; /* actually, unknown */
 718                 wil_info(wil,
 719                          "Boot Loader struct v%d: MAC = %pM RF = 0x%08x bband = 0x%08x\n",
 720                          bl_ver, mac,
 721                          bl.bl0.rf_type, bl.bl0.baseband_type);
 722                 wil_info(wil, "Boot Loader build unknown for struct v0\n");
 723         } else {
 724                 le16_to_cpus(&bl.bl1.rf_type);
 725                 rf_status = le16_to_cpu(bl.bl1.rf_status);
 726                 le32_to_cpus(&bl.bl1.baseband_type);
 727                 le16_to_cpus(&bl.bl1.bl_version_subminor);
 728                 le16_to_cpus(&bl.bl1.bl_version_build);
 729                 wil_info(wil,
 730                          "Boot Loader struct v%d: MAC = %pM RF = 0x%04x (status 0x%04x) bband = 0x%08x\n",
 731                          bl_ver, mac,
 732                          bl.bl1.rf_type, rf_status,
 733                          bl.bl1.baseband_type);
 734                 wil_info(wil, "Boot Loader build %d.%d.%d.%d\n",
 735                          bl.bl1.bl_version_major, bl.bl1.bl_version_minor,
 736                          bl.bl1.bl_version_subminor, bl.bl1.bl_version_build);
 737         }
 738
 739         if (!is_valid_ether_addr(mac)) {
 740                 wil_err(wil, "BL: Invalid MAC %pM\n", mac);
 741                 return -EINVAL;
 742         }
 743
 744         ether_addr_copy(ndev->perm_addr, mac);
 745         ether_addr_copy(wiphy->perm_addr, mac);
 746         if (!is_valid_ether_addr(ndev->dev_addr))
 747                 ether_addr_copy(ndev->dev_addr, mac);
 748
 749         if (rf_status) {/* bad RF cable? */
 750                 wil_err(wil, "RF communication error 0x%04x",
 751                         rf_status);
 752                 return -EAGAIN;
 753         }
 754
 755         return 0;
 756 }
 757
 758 static void wil_bl_crash_info(struct wil6210_priv *wil, bool is_err)
 759 {
 760         u32 bl_assert_code, bl_assert_blink, bl_magic_number;
 761         u32 bl_ver = wil_r(wil, RGF_USER_BL +
 762                            offsetof(struct bl_dedicated_registers_v0,
 763                                     boot_loader_struct_version));
 764
 765         if (bl_ver < 2)
 766                 return;
 767
 768         bl_assert_code = wil_r(wil, RGF_USER_BL +
 769                                offsetof(struct bl_dedicated_registers_v1,
 770                                         bl_assert_code));
 771         bl_assert_blink = wil_r(wil, RGF_USER_BL +
 772                                 offsetof(struct bl_dedicated_registers_v1,
 773                                          bl_assert_blink));
 774         bl_magic_number = wil_r(wil, RGF_USER_BL +
 775                                 offsetof(struct bl_dedicated_registers_v1,
 776                                          bl_magic_number));
 777
 778         if (is_err) {
 779                 wil_err(wil,
 780                         "BL assert code 0x%08x blink 0x%08x magic 0x%08x\n",
 781                         bl_assert_code, bl_assert_blink, bl_magic_number);
 782         } else {
 783                 wil_dbg_misc(wil,
 784                              "BL assert code 0x%08x blink 0x%08x magic 0x%08x\n",
 785                              bl_assert_code, bl_assert_blink, bl_magic_number);
 786         }
 787 }
 788
 789 static int wil_wait_for_fw_ready(struct wil6210_priv *wil)
 790 {
 791         ulong to = msecs_to_jiffies(1000);
 792         ulong left = wait_for_completion_timeout(&wil->wmi_ready, to);
 793
 794         if (0 == left) {
 795                 wil_err(wil, "Firmware not ready\n");
 796                 return -ETIME;
 797         } else {
 798                 wil_info(wil, "FW ready after %d ms. HW version 0x%08x\n",
 799                          jiffies_to_msecs(to-left), wil->hw_version);
 800         }
 801         return 0;
 802 }
 803
 804 /*
 805  * We reset all the structures, and we reset the UMAC.
 806  * After calling this routine, you're expected to reload
 807  * the firmware.
 808  */
 809 int wil_reset(struct wil6210_priv *wil, bool load_fw)
 810 {
 811         int rc;
 812
 813         wil_dbg_misc(wil, "%s()\n", __func__);
 814
 815         WARN_ON(!mutex_is_locked(&wil->mutex));
 816         WARN_ON(test_bit(wil_status_napi_en, wil->status));
 817
 818         if (debug_fw) {
 819                 static const u8 mac[ETH_ALEN] = {
 820                         0x00, 0xde, 0xad, 0x12, 0x34, 0x56,
 821                 };
 822                 struct net_device *ndev = wil_to_ndev(wil);
 823
 824                 ether_addr_copy(ndev->perm_addr, mac);
 825                 ether_addr_copy(ndev->dev_addr, ndev->perm_addr);
 826                 return 0;
 827         }
 828
 829         if (wil->hw_version == HW_VER_UNKNOWN)
 830                 return -ENODEV;
 831
 832         if (wil->platform_ops.notify) {
 833                 rc = wil->platform_ops.notify(wil->platform_handle,
 834                                               WIL_PLATFORM_EVT_PRE_RESET);
 835                 if (rc)
 836                         wil_err(wil,
 837                                 "%s: PRE_RESET platform notify failed, rc %d\n",
 838                                 __func__, rc);
 839         }
 840
 841         set_bit(wil_status_resetting, wil->status);
 842
 843         cancel_work_sync(&wil->disconnect_worker);
 844         wil6210_disconnect(wil, NULL, WLAN_REASON_DEAUTH_LEAVING, false);
 845         wil_bcast_fini(wil);
 846
 847         /* Disable device led before reset*/
 848         wmi_led_cfg(wil, false);
 849
 850         /* prevent NAPI from being scheduled and prevent wmi commands */
 851         mutex_lock(&wil->wmi_mutex);
 852         bitmap_zero(wil->status, wil_status_last);
 853         mutex_unlock(&wil->wmi_mutex);
 854
 855         mutex_lock(&wil->p2p_wdev_mutex);
 856         if (wil->scan_request) {
 857                 struct cfg80211_scan_info info = {
 858                         .aborted = true,
 859                 };
 860
 861                 wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
 862                              wil->scan_request);
 863                 del_timer_sync(&wil->scan_timer);
 864                 cfg80211_scan_done(wil->scan_request, &info);
 865                 wil->scan_request = NULL;
 866         }
 867         mutex_unlock(&wil->p2p_wdev_mutex);
 868
 869         wil_mask_irq(wil);
 870
 871         wmi_event_flush(wil);
 872
 873         flush_workqueue(wil->wq_service);
 874         flush_workqueue(wil->wmi_wq);
 875
 876         wil_bl_crash_info(wil, false);
 877         rc = wil_target_reset(wil);
 878         wil_rx_fini(wil);
 879         if (rc) {
 880                 wil_bl_crash_info(wil, true);
 881                 return rc;
 882         }
 883
 884         rc = wil_get_bl_info(wil);
 885         if (rc == -EAGAIN && !load_fw) /* ignore RF error if not going up */
 886                 rc = 0;
 887         if (rc)
 888                 return rc;
 889
 890         wil_set_oob_mode(wil, oob_mode);
 891         if (load_fw) {
 892                 wil_info(wil, "Use firmware <%s> + board <%s>\n", WIL_FW_NAME,
 893                          WIL_FW2_NAME);
 894
 895                 wil_halt_cpu(wil);
 896                 memset(wil->fw_version, 0, sizeof(wil->fw_version));
 897                 /* Loading f/w from the file */
 898                 rc = wil_request_firmware(wil, WIL_FW_NAME, true);
 899                 if (rc)
 900                         return rc;
 901                 rc = wil_request_firmware(wil, WIL_FW2_NAME, true);
 902                 if (rc)
 903                         return rc;
 904
 905                 /* Mark FW as loaded from host */
 906                 wil_s(wil, RGF_USER_USAGE_6, 1);
 907
 908                 /* clear any interrupts which on-card-firmware
 909                  * may have set
 910                  */
 911                 wil6210_clear_irq(wil);
 912                 /* CAF_ICR - clear and mask */
 913                 /* it is W1C, clear by writing back same value */
 914                 wil_s(wil, RGF_CAF_ICR + offsetof(struct RGF_ICR, ICR), 0);
 915                 wil_w(wil, RGF_CAF_ICR + offsetof(struct RGF_ICR, IMV), ~0);
 916
 917                 wil_release_cpu(wil);
 918         }
 919
 920         /* init after reset */
 921         wil->ap_isolate = 0;
 922         reinit_completion(&wil->wmi_ready);
 923         reinit_completion(&wil->wmi_call);
 924         reinit_completion(&wil->halp.comp);
 925
 926         if (load_fw) {
 927                 wil_configure_interrupt_moderation(wil);
 928                 wil_unmask_irq(wil);
 929
 930                 /* we just started MAC, wait for FW ready */
 931                 rc = wil_wait_for_fw_ready(wil);
 932                 if (rc)
 933                         return rc;
 934
 935                 /* check FW is responsive */
 936                 rc = wmi_echo(wil);
 937                 if (rc) {
 938                         wil_err(wil, "%s: wmi_echo failed, rc %d\n",
 939                                 __func__, rc);
 940                         return rc;
 941                 }
 942
 943                 if (wil->platform_ops.notify) {
 944                         rc = wil->platform_ops.notify(wil->platform_handle,
 945                                                       WIL_PLATFORM_EVT_FW_RDY);
 946                         if (rc) {
 947                                 wil_err(wil,
 948                                         "%s: FW_RDY notify failed, rc %d\n",
 949                                         __func__, rc);
 950                                 rc = 0;
 951                         }
 952                 }
 953         }
 954
 955         return rc;
 956 }
 957
 958 void wil_fw_error_recovery(struct wil6210_priv *wil)
 959 {
 960         wil_dbg_misc(wil, "starting fw error recovery\n");
 961
 962         if (test_bit(wil_status_resetting, wil->status)) {
 963                 wil_info(wil, "Reset already in progress\n");
 964                 return;
 965         }
 966
 967         wil->recovery_state = fw_recovery_pending;
 968         schedule_work(&wil->fw_error_worker);
 969 }
 970
 971 int __wil_up(struct wil6210_priv *wil)
 972 {
 973         struct net_device *ndev = wil_to_ndev(wil);
 974         struct wireless_dev *wdev = wil->wdev;
 975         int rc;
 976
 977         WARN_ON(!mutex_is_locked(&wil->mutex));
 978
 979         rc = wil_reset(wil, true);
 980         if (rc)
 981                 return rc;
 982
 983         /* Rx VRING. After MAC and beacon */
 984         rc = wil_rx_init(wil, 1 << rx_ring_order);
 985         if (rc)
 986                 return rc;
 987
 988         switch (wdev->iftype) {
 989         case NL80211_IFTYPE_STATION:
 990                 wil_dbg_misc(wil, "type: STATION\n");
 991                 ndev->type = ARPHRD_ETHER;
 992                 break;
 993         case NL80211_IFTYPE_AP:
 994                 wil_dbg_misc(wil, "type: AP\n");
 995                 ndev->type = ARPHRD_ETHER;
 996                 break;
 997         case NL80211_IFTYPE_P2P_CLIENT:
 998                 wil_dbg_misc(wil, "type: P2P_CLIENT\n");
 999                 ndev->type = ARPHRD_ETHER;
1000                 break;
1001         case NL80211_IFTYPE_P2P_GO:
1002                 wil_dbg_misc(wil, "type: P2P_GO\n");
1003                 ndev->type = ARPHRD_ETHER;
1004                 break;
1005         case NL80211_IFTYPE_MONITOR:
1006                 wil_dbg_misc(wil, "type: Monitor\n");
1007                 ndev->type = ARPHRD_IEEE80211_RADIOTAP;
1008                 /* ARPHRD_IEEE80211 or ARPHRD_IEEE80211_RADIOTAP ? */
1009                 break;
1010         default:
1011                 return -EOPNOTSUPP;
1012         }
1013
1014         /* MAC address - pre-requisite for other commands */
1015         wmi_set_mac_address(wil, ndev->dev_addr);
1016
1017         wil_dbg_misc(wil, "NAPI enable\n");
1018         napi_enable(&wil->napi_rx);
1019         napi_enable(&wil->napi_tx);
1020         set_bit(wil_status_napi_en, wil->status);
1021
1022         if (wil->platform_ops.bus_request)
1023                 wil->platform_ops.bus_request(wil->platform_handle,
1024                                               WIL_MAX_BUS_REQUEST_KBPS);
1025
1026         return 0;
1027 }
1028
1029 int wil_up(struct wil6210_priv *wil)
1030 {
1031         int rc;
1032
1033         wil_dbg_misc(wil, "%s()\n", __func__);
1034
1035         mutex_lock(&wil->mutex);
1036         rc = __wil_up(wil);
1037         mutex_unlock(&wil->mutex);
1038
1039         return rc;
1040 }
1041
1042 int __wil_down(struct wil6210_priv *wil)
1043 {
1044         WARN_ON(!mutex_is_locked(&wil->mutex));
1045
1046         set_bit(wil_status_resetting, wil->status);
1047
1048         if (wil->platform_ops.bus_request)
1049                 wil->platform_ops.bus_request(wil->platform_handle, 0);
1050
1051         wil_disable_irq(wil);
1052         if (test_and_clear_bit(wil_status_napi_en, wil->status)) {
1053                 napi_disable(&wil->napi_rx);
1054                 napi_disable(&wil->napi_tx);
1055                 wil_dbg_misc(wil, "NAPI disable\n");
1056         }
1057         wil_enable_irq(wil);
1058
1059         wil_p2p_stop_radio_operations(wil);
1060
1061         mutex_lock(&wil->p2p_wdev_mutex);
1062         if (wil->scan_request) {
1063                 struct cfg80211_scan_info info = {
1064                         .aborted = true,
1065                 };
1066
1067                 wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
1068                              wil->scan_request);
1069                 del_timer_sync(&wil->scan_timer);
1070                 cfg80211_scan_done(wil->scan_request, &info);
1071                 wil->scan_request = NULL;
1072         }
1073         mutex_unlock(&wil->p2p_wdev_mutex);
1074
1075         wil_reset(wil, false);
1076
1077         return 0;
1078 }
1079
1080 int wil_down(struct wil6210_priv *wil)
1081 {
1082         int rc;
1083
1084         wil_dbg_misc(wil, "%s()\n", __func__);
1085
1086         wil_set_recovery_state(wil, fw_recovery_idle);
1087         mutex_lock(&wil->mutex);
1088         rc = __wil_down(wil);
1089         mutex_unlock(&wil->mutex);
1090
1091         return rc;
1092 }
1093
1094 int wil_find_cid(struct wil6210_priv *wil, const u8 *mac)
1095 {
1096         int i;
1097         int rc = -ENOENT;
1098
1099         for (i = 0; i < ARRAY_SIZE(wil->sta); i++) {
1100                 if ((wil->sta[i].status != wil_sta_unused) &&
1101                     ether_addr_equal(wil->sta[i].addr, mac)) {
1102                         rc = i;
1103                         break;
1104                 }
1105         }
1106
1107         return rc;
1108 }
1109
1110 void wil_halp_vote(struct wil6210_priv *wil)
1111 {
1112         unsigned long rc;
1113         unsigned long to_jiffies = msecs_to_jiffies(WAIT_FOR_HALP_VOTE_MS);
1114
1115         mutex_lock(&wil->halp.lock);
1116
1117         wil_dbg_irq(wil, "%s: start, HALP ref_cnt (%d)\n", __func__,
1118                     wil->halp.ref_cnt);
1119
1120         if (++wil->halp.ref_cnt == 1) {
1121                 wil6210_set_halp(wil);
1122                 rc = wait_for_completion_timeout(&wil->halp.comp, to_jiffies);
1123                 if (!rc) {
1124                         wil_err(wil, "%s: HALP vote timed out\n", __func__);
1125                         /* Mask HALP as done in case the interrupt is raised */
1126                         wil6210_mask_halp(wil);
1127                 } else {
1128                         wil_dbg_irq(wil,
1129                                     "%s: HALP vote completed after %d ms\n",
1130                                     __func__,
1131                                     jiffies_to_msecs(to_jiffies - rc));
1132                 }
1133         }
1134
1135         wil_dbg_irq(wil, "%s: end, HALP ref_cnt (%d)\n", __func__,
1136                     wil->halp.ref_cnt);
1137
1138         mutex_unlock(&wil->halp.lock);
1139 }
1140
1141 void wil_halp_unvote(struct wil6210_priv *wil)
1142 {
1143         WARN_ON(wil->halp.ref_cnt == 0);
1144
1145         mutex_lock(&wil->halp.lock);
1146
1147         wil_dbg_irq(wil, "%s: start, HALP ref_cnt (%d)\n", __func__,
1148                     wil->halp.ref_cnt);
1149
1150         if (--wil->halp.ref_cnt == 0) {
1151                 wil6210_clear_halp(wil);
1152                 wil_dbg_irq(wil, "%s: HALP unvote\n", __func__);
1153         }
1154
1155         wil_dbg_irq(wil, "%s: end, HALP ref_cnt (%d)\n", __func__,
1156                     wil->halp.ref_cnt);
1157
1158         mutex_unlock(&wil->halp.lock);
1159 }