drivers/net/wireless/ath/wil6210/main.c

   1 /*
   2  * Copyright (c) 2012-2014 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
  24 static bool no_fw_recovery;
  25 module_param(no_fw_recovery, bool, S_IRUGO | S_IWUSR);
  26 MODULE_PARM_DESC(no_fw_recovery, " disable FW error recovery");
  27
  28 #define RST_DELAY (20) /* msec, for loop in @wil_target_reset */
  29 #define RST_COUNT (1 + 1000/RST_DELAY) /* round up to be above 1 sec total */
  30
  31 /*
  32  * Due to a hardware issue,
  33  * one has to read/write to/from NIC in 32-bit chunks;
  34  * regular memcpy_fromio and siblings will
  35  * not work on 64-bit platform - it uses 64-bit transactions
  36  *
  37  * Force 32-bit transactions to enable NIC on 64-bit platforms
  38  *
  39  * To avoid byte swap on big endian host, __raw_{read|write}l
  40  * should be used - {read|write}l would swap bytes to provide
  41  * little endian on PCI value in host endianness.
  42  */
  43 void wil_memcpy_fromio_32(void *dst, const volatile void __iomem *src,
  44                           size_t count)
  45 {
  46         u32 *d = dst;
  47         const volatile u32 __iomem *s = src;
  48
  49         /* size_t is unsigned, if (count%4 != 0) it will wrap */
  50         for (count += 4; count > 4; count -= 4)
  51                 *d++ = __raw_readl(s++);
  52 }
  53
  54 void wil_memcpy_toio_32(volatile void __iomem *dst, const void *src,
  55                         size_t count)
  56 {
  57         volatile u32 __iomem *d = dst;
  58         const u32 *s = src;
  59
  60         for (count += 4; count > 4; count -= 4)
  61                 __raw_writel(*s++, d++);
  62 }
  63
  64 static void wil_disconnect_cid(struct wil6210_priv *wil, int cid)
  65 {
  66         uint i;
  67         struct net_device *ndev = wil_to_ndev(wil);
  68         struct wireless_dev *wdev = wil->wdev;
  69         struct wil_sta_info *sta = &wil->sta[cid];
  70         wil_dbg_misc(wil, "%s(CID %d, status %d)\n", __func__, cid,
  71                      sta->status);
  72
  73         sta->data_port_open = false;
  74         if (sta->status != wil_sta_unused) {
  75                 wmi_disconnect_sta(wil, sta->addr, WLAN_REASON_DEAUTH_LEAVING);
  76                 switch (wdev->iftype) {
  77                 case NL80211_IFTYPE_AP:
  78                 case NL80211_IFTYPE_P2P_GO:
  79                         /* AP-like interface */
  80                         cfg80211_del_sta(ndev, sta->addr, GFP_KERNEL);
  81                         break;
  82                 default:
  83                         break;
  84                 }
  85                 sta->status = wil_sta_unused;
  86         }
  87
  88         for (i = 0; i < WIL_STA_TID_NUM; i++) {
  89                 struct wil_tid_ampdu_rx *r = sta->tid_rx[i];
  90                 sta->tid_rx[i] = NULL;
  91                 wil_tid_ampdu_rx_free(wil, r);
  92         }
  93         for (i = 0; i < ARRAY_SIZE(wil->vring_tx); i++) {
  94                 if (wil->vring2cid_tid[i][0] == cid)
  95                         wil_vring_fini_tx(wil, i);
  96         }
  97         memset(&sta->stats, 0, sizeof(sta->stats));
  98 }
  99
 100 static void _wil6210_disconnect(struct wil6210_priv *wil, const u8 *bssid)
 101 {
 102         int cid = -ENOENT;
 103         struct net_device *ndev = wil_to_ndev(wil);
 104         struct wireless_dev *wdev = wil->wdev;
 105
 106         might_sleep();
 107         if (bssid) {
 108                 cid = wil_find_cid(wil, bssid);
 109                 wil_dbg_misc(wil, "%s(%pM, CID %d)\n", __func__, bssid, cid);
 110         } else {
 111                 wil_dbg_misc(wil, "%s(all)\n", __func__);
 112         }
 113
 114         if (cid >= 0) /* disconnect 1 peer */
 115                 wil_disconnect_cid(wil, cid);
 116         else /* disconnect all */
 117                 for (cid = 0; cid < WIL6210_MAX_CID; cid++)
 118                         wil_disconnect_cid(wil, cid);
 119
 120         /* link state */
 121         switch (wdev->iftype) {
 122         case NL80211_IFTYPE_STATION:
 123         case NL80211_IFTYPE_P2P_CLIENT:
 124                 wil_link_off(wil);
 125                 if (test_bit(wil_status_fwconnected, &wil->status)) {
 126                         clear_bit(wil_status_fwconnected, &wil->status);
 127                         cfg80211_disconnected(ndev,
 128                                               WLAN_STATUS_UNSPECIFIED_FAILURE,
 129                                               NULL, 0, GFP_KERNEL);
 130                 } else if (test_bit(wil_status_fwconnecting, &wil->status)) {
 131                         cfg80211_connect_result(ndev, bssid, NULL, 0, NULL, 0,
 132                                                 WLAN_STATUS_UNSPECIFIED_FAILURE,
 133                                                 GFP_KERNEL);
 134                 }
 135                 clear_bit(wil_status_fwconnecting, &wil->status);
 136                 break;
 137         default:
 138                 break;
 139         }
 140 }
 141
 142 static void wil_disconnect_worker(struct work_struct *work)
 143 {
 144         struct wil6210_priv *wil = container_of(work,
 145                         struct wil6210_priv, disconnect_worker);
 146
 147         mutex_lock(&wil->mutex);
 148         _wil6210_disconnect(wil, NULL);
 149         mutex_unlock(&wil->mutex);
 150 }
 151
 152 static void wil_connect_timer_fn(ulong x)
 153 {
 154         struct wil6210_priv *wil = (void *)x;
 155
 156         wil_dbg_misc(wil, "Connect timeout\n");
 157
 158         /* reschedule to thread context - disconnect won't
 159          * run from atomic context
 160          */
 161         schedule_work(&wil->disconnect_worker);
 162 }
 163
 164 static void wil_scan_timer_fn(ulong x)
 165 {
 166         struct wil6210_priv *wil = (void *)x;
 167
 168         clear_bit(wil_status_fwready, &wil->status);
 169         wil_err(wil, "Scan timeout detected, start fw error recovery\n");
 170         schedule_work(&wil->fw_error_worker);
 171 }
 172
 173 static void wil_fw_error_worker(struct work_struct *work)
 174 {
 175         struct wil6210_priv *wil = container_of(work,
 176                         struct wil6210_priv, fw_error_worker);
 177         struct wireless_dev *wdev = wil->wdev;
 178
 179         wil_dbg_misc(wil, "fw error worker\n");
 180
 181         if (no_fw_recovery)
 182                 return;
 183
 184         /* increment @recovery_count if less then WIL6210_FW_RECOVERY_TO
 185          * passed since last recovery attempt
 186          */
 187         if (time_is_after_jiffies(wil->last_fw_recovery +
 188                                   WIL6210_FW_RECOVERY_TO))
 189                 wil->recovery_count++;
 190         else
 191                 wil->recovery_count = 1; /* fw was alive for a long time */
 192
 193         if (wil->recovery_count > WIL6210_FW_RECOVERY_RETRIES) {
 194                 wil_err(wil, "too many recovery attempts (%d), giving up\n",
 195                         wil->recovery_count);
 196                 return;
 197         }
 198
 199         wil->last_fw_recovery = jiffies;
 200
 201         mutex_lock(&wil->mutex);
 202         switch (wdev->iftype) {
 203         case NL80211_IFTYPE_STATION:
 204         case NL80211_IFTYPE_P2P_CLIENT:
 205         case NL80211_IFTYPE_MONITOR:
 206                 wil_info(wil, "fw error recovery started (try %d)...\n",
 207                          wil->recovery_count);
 208                 wil_reset(wil);
 209
 210                 /* need to re-allocate Rx ring after reset */
 211                 wil_rx_init(wil);
 212                 break;
 213         case NL80211_IFTYPE_AP:
 214         case NL80211_IFTYPE_P2P_GO:
 215                 /* recovery in these modes is done by upper layers */
 216                 break;
 217         default:
 218                 break;
 219         }
 220         mutex_unlock(&wil->mutex);
 221 }
 222
 223 static int wil_find_free_vring(struct wil6210_priv *wil)
 224 {
 225         int i;
 226         for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
 227                 if (!wil->vring_tx[i].va)
 228                         return i;
 229         }
 230         return -EINVAL;
 231 }
 232
 233 static void wil_connect_worker(struct work_struct *work)
 234 {
 235         int rc;
 236         struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
 237                                                 connect_worker);
 238         int cid = wil->pending_connect_cid;
 239         int ringid = wil_find_free_vring(wil);
 240
 241         if (cid < 0) {
 242                 wil_err(wil, "No connection pending\n");
 243                 return;
 244         }
 245
 246         wil_dbg_wmi(wil, "Configure for connection CID %d\n", cid);
 247
 248         rc = wil_vring_init_tx(wil, ringid, WIL6210_TX_RING_SIZE, cid, 0);
 249         wil->pending_connect_cid = -1;
 250         if (rc == 0) {
 251                 wil->sta[cid].status = wil_sta_connected;
 252                 wil_link_on(wil);
 253         } else {
 254                 wil->sta[cid].status = wil_sta_unused;
 255         }
 256 }
 257
 258 int wil_priv_init(struct wil6210_priv *wil)
 259 {
 260         wil_dbg_misc(wil, "%s()\n", __func__);
 261
 262         memset(wil->sta, 0, sizeof(wil->sta));
 263
 264         mutex_init(&wil->mutex);
 265         mutex_init(&wil->wmi_mutex);
 266
 267         init_completion(&wil->wmi_ready);
 268
 269         wil->pending_connect_cid = -1;
 270         setup_timer(&wil->connect_timer, wil_connect_timer_fn, (ulong)wil);
 271         setup_timer(&wil->scan_timer, wil_scan_timer_fn, (ulong)wil);
 272
 273         INIT_WORK(&wil->connect_worker, wil_connect_worker);
 274         INIT_WORK(&wil->disconnect_worker, wil_disconnect_worker);
 275         INIT_WORK(&wil->wmi_event_worker, wmi_event_worker);
 276         INIT_WORK(&wil->fw_error_worker, wil_fw_error_worker);
 277
 278         INIT_LIST_HEAD(&wil->pending_wmi_ev);
 279         spin_lock_init(&wil->wmi_ev_lock);
 280
 281         wil->wmi_wq = create_singlethread_workqueue(WIL_NAME"_wmi");
 282         if (!wil->wmi_wq)
 283                 return -EAGAIN;
 284
 285         wil->wmi_wq_conn = create_singlethread_workqueue(WIL_NAME"_connect");
 286         if (!wil->wmi_wq_conn) {
 287                 destroy_workqueue(wil->wmi_wq);
 288                 return -EAGAIN;
 289         }
 290
 291         wil->last_fw_recovery = jiffies;
 292
 293         return 0;
 294 }
 295
 296 void wil6210_disconnect(struct wil6210_priv *wil, const u8 *bssid)
 297 {
 298         del_timer_sync(&wil->connect_timer);
 299         _wil6210_disconnect(wil, bssid);
 300 }
 301
 302 void wil_priv_deinit(struct wil6210_priv *wil)
 303 {
 304         del_timer_sync(&wil->scan_timer);
 305         cancel_work_sync(&wil->disconnect_worker);
 306         cancel_work_sync(&wil->fw_error_worker);
 307         mutex_lock(&wil->mutex);
 308         wil6210_disconnect(wil, NULL);
 309         mutex_unlock(&wil->mutex);
 310         wmi_event_flush(wil);
 311         destroy_workqueue(wil->wmi_wq_conn);
 312         destroy_workqueue(wil->wmi_wq);
 313 }
 314
 315 static int wil_target_reset(struct wil6210_priv *wil)
 316 {
 317         int delay = 0;
 318         u32 hw_state;
 319         u32 rev_id;
 320         bool is_sparrow = (wil->board->board == WIL_BOARD_SPARROW);
 321
 322         wil_dbg_misc(wil, "Resetting \"%s\"...\n", wil->board->name);
 323
 324         /* register read */
 325 #define R(a) ioread32(wil->csr + HOSTADDR(a))
 326         /* register write */
 327 #define W(a, v) iowrite32(v, wil->csr + HOSTADDR(a))
 328         /* register set = read, OR, write */
 329 #define S(a, v) W(a, R(a) | v)
 330         /* register clear = read, AND with inverted, write */
 331 #define C(a, v) W(a, R(a) & ~v)
 332
 333         wmb(); /* If host reorder writes here -> race in NIC */
 334         W(RGF_USER_MAC_CPU_0,  BIT(1)); /* mac_cpu_man_rst */
 335         wil->hw_version = R(RGF_USER_FW_REV_ID);
 336         rev_id = wil->hw_version & 0xff;
 337
 338         /* Clear MAC link up */
 339         S(RGF_HP_CTRL, BIT(15));
 340         /* hpal_perst_from_pad_src_n_mask */
 341         S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT(6));
 342         /* car_perst_rst_src_n_mask */
 343         S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT(7));
 344         wmb(); /* order is important here */
 345
 346         if (is_sparrow) {
 347                 W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x3ff81f);
 348                 wmb(); /* order is important here */
 349         }
 350
 351         W(RGF_USER_USER_CPU_0, BIT(1)); /* user_cpu_man_rst */
 352         wmb(); /* If host reorder writes here -> race in NIC */
 353         W(RGF_USER_MAC_CPU_0,  BIT(1)); /* mac_cpu_man_rst */
 354         wmb(); /* order is important here */
 355
 356         W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0xFE000000);
 357         W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0x0000003F);
 358         W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, is_sparrow ? 0x000000B0 : 0x00000170);
 359         W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0xFFE7FC00);
 360         wmb(); /* order is important here */
 361
 362         if (is_sparrow) {
 363                 W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x0);
 364                 wmb(); /* order is important here */
 365         }
 366
 367         W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0);
 368         W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0);
 369         W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0);
 370         W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
 371         wmb(); /* order is important here */
 372
 373         if (is_sparrow) {
 374                 W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000003);
 375                 /* reset A2 PCIE AHB */
 376                 W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00008000);
 377
 378         } else {
 379                 W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000001);
 380                 if (rev_id == 1) {
 381                         /* reset A1 BOTH PCIE AHB & PCIE RGF */
 382                         W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00000080);
 383                 } else {
 384                         W(RGF_PCIE_LOS_COUNTER_CTL, BIT(6) | BIT(8));
 385                         W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00008000);
 386                 }
 387
 388         }
 389
 390         /* TODO: check order here!!! Erez code is different */
 391         W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
 392         wmb(); /* order is important here */
 393
 394         /* wait until device ready. typical time is 200..250 msec */
 395         do {
 396                 msleep(RST_DELAY);
 397                 hw_state = R(RGF_USER_HW_MACHINE_STATE);
 398                 if (delay++ > RST_COUNT) {
 399                         wil_err(wil, "Reset not completed, hw_state 0x%08x\n",
 400                                 hw_state);
 401                         return -ETIME;
 402                 }
 403         } while (hw_state != HW_MACHINE_BOOT_DONE);
 404
 405         /* TODO: Erez check rev_id != 1 */
 406         if (!is_sparrow && (rev_id != 1))
 407                 W(RGF_PCIE_LOS_COUNTER_CTL, BIT(8));
 408
 409         C(RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_RST_PWGD);
 410         wmb(); /* order is important here */
 411
 412         wil_dbg_misc(wil, "Reset completed in %d ms\n", delay * RST_DELAY);
 413         return 0;
 414
 415 #undef R
 416 #undef W
 417 #undef S
 418 #undef C
 419 }
 420
 421 void wil_mbox_ring_le2cpus(struct wil6210_mbox_ring *r)
 422 {
 423         le32_to_cpus(&r->base);
 424         le16_to_cpus(&r->entry_size);
 425         le16_to_cpus(&r->size);
 426         le32_to_cpus(&r->tail);
 427         le32_to_cpus(&r->head);
 428 }
 429
 430 static int wil_wait_for_fw_ready(struct wil6210_priv *wil)
 431 {
 432         ulong to = msecs_to_jiffies(1000);
 433         ulong left = wait_for_completion_timeout(&wil->wmi_ready, to);
 434         if (0 == left) {
 435                 wil_err(wil, "Firmware not ready\n");
 436                 return -ETIME;
 437         } else {
 438                 wil_info(wil, "FW ready after %d ms. HW version 0x%08x\n",
 439                          jiffies_to_msecs(to-left), wil->hw_version);
 440         }
 441         return 0;
 442 }
 443
 444 /*
 445  * We reset all the structures, and we reset the UMAC.
 446  * After calling this routine, you're expected to reload
 447  * the firmware.
 448  */
 449 int wil_reset(struct wil6210_priv *wil)
 450 {
 451         int rc;
 452
 453         WARN_ON(!mutex_is_locked(&wil->mutex));
 454
 455         cancel_work_sync(&wil->disconnect_worker);
 456         wil6210_disconnect(wil, NULL);
 457
 458         wil->status = 0; /* prevent NAPI from being scheduled */
 459         if (test_bit(wil_status_napi_en, &wil->status)) {
 460                 napi_synchronize(&wil->napi_rx);
 461         }
 462
 463         if (wil->scan_request) {
 464                 wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
 465                              wil->scan_request);
 466                 del_timer_sync(&wil->scan_timer);
 467                 cfg80211_scan_done(wil->scan_request, true);
 468                 wil->scan_request = NULL;
 469         }
 470
 471         wil6210_disable_irq(wil);
 472
 473         wmi_event_flush(wil);
 474
 475         flush_workqueue(wil->wmi_wq_conn);
 476         flush_workqueue(wil->wmi_wq);
 477
 478         rc = wil_target_reset(wil);
 479         wil_rx_fini(wil);
 480         if (rc)
 481                 return rc;
 482
 483
 484         /* init after reset */
 485         wil->pending_connect_cid = -1;
 486         reinit_completion(&wil->wmi_ready);
 487
 488         /* TODO: release MAC reset */
 489         wil6210_enable_irq(wil);
 490
 491         /* we just started MAC, wait for FW ready */
 492         rc = wil_wait_for_fw_ready(wil);
 493
 494         return rc;
 495 }
 496
 497 void wil_fw_error_recovery(struct wil6210_priv *wil)
 498 {
 499         wil_dbg_misc(wil, "starting fw error recovery\n");
 500         schedule_work(&wil->fw_error_worker);
 501 }
 502
 503 void wil_link_on(struct wil6210_priv *wil)
 504 {
 505         struct net_device *ndev = wil_to_ndev(wil);
 506
 507         wil_dbg_misc(wil, "%s()\n", __func__);
 508
 509         netif_carrier_on(ndev);
 510         wil_dbg_misc(wil, "netif_tx_wake : link on\n");
 511         netif_tx_wake_all_queues(ndev);
 512 }
 513
 514 void wil_link_off(struct wil6210_priv *wil)
 515 {
 516         struct net_device *ndev = wil_to_ndev(wil);
 517
 518         wil_dbg_misc(wil, "%s()\n", __func__);
 519
 520         netif_tx_stop_all_queues(ndev);
 521         wil_dbg_misc(wil, "netif_tx_stop : link off\n");
 522         netif_carrier_off(ndev);
 523 }
 524
 525 static int __wil_up(struct wil6210_priv *wil)
 526 {
 527         struct net_device *ndev = wil_to_ndev(wil);
 528         struct wireless_dev *wdev = wil->wdev;
 529         int rc;
 530
 531         WARN_ON(!mutex_is_locked(&wil->mutex));
 532
 533         rc = wil_reset(wil);
 534         if (rc)
 535                 return rc;
 536
 537         /* Rx VRING. After MAC and beacon */
 538         rc = wil_rx_init(wil);
 539         if (rc)
 540                 return rc;
 541
 542         switch (wdev->iftype) {
 543         case NL80211_IFTYPE_STATION:
 544                 wil_dbg_misc(wil, "type: STATION\n");
 545                 ndev->type = ARPHRD_ETHER;
 546                 break;
 547         case NL80211_IFTYPE_AP:
 548                 wil_dbg_misc(wil, "type: AP\n");
 549                 ndev->type = ARPHRD_ETHER;
 550                 break;
 551         case NL80211_IFTYPE_P2P_CLIENT:
 552                 wil_dbg_misc(wil, "type: P2P_CLIENT\n");
 553                 ndev->type = ARPHRD_ETHER;
 554                 break;
 555         case NL80211_IFTYPE_P2P_GO:
 556                 wil_dbg_misc(wil, "type: P2P_GO\n");
 557                 ndev->type = ARPHRD_ETHER;
 558                 break;
 559         case NL80211_IFTYPE_MONITOR:
 560                 wil_dbg_misc(wil, "type: Monitor\n");
 561                 ndev->type = ARPHRD_IEEE80211_RADIOTAP;
 562                 /* ARPHRD_IEEE80211 or ARPHRD_IEEE80211_RADIOTAP ? */
 563                 break;
 564         default:
 565                 return -EOPNOTSUPP;
 566         }
 567
 568         /* MAC address - pre-requisite for other commands */
 569         wmi_set_mac_address(wil, ndev->dev_addr);
 570
 571
 572         napi_enable(&wil->napi_rx);
 573         napi_enable(&wil->napi_tx);
 574         set_bit(wil_status_napi_en, &wil->status);
 575
 576         return 0;
 577 }
 578
 579 int wil_up(struct wil6210_priv *wil)
 580 {
 581         int rc;
 582
 583         mutex_lock(&wil->mutex);
 584         rc = __wil_up(wil);
 585         mutex_unlock(&wil->mutex);
 586
 587         return rc;
 588 }
 589
 590 static int __wil_down(struct wil6210_priv *wil)
 591 {
 592         WARN_ON(!mutex_is_locked(&wil->mutex));
 593
 594         clear_bit(wil_status_napi_en, &wil->status);
 595         napi_disable(&wil->napi_rx);
 596         napi_disable(&wil->napi_tx);
 597
 598         if (wil->scan_request) {
 599                 wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
 600                              wil->scan_request);
 601                 del_timer_sync(&wil->scan_timer);
 602                 cfg80211_scan_done(wil->scan_request, true);
 603                 wil->scan_request = NULL;
 604         }
 605
 606         wil6210_disconnect(wil, NULL);
 607         wil_rx_fini(wil);
 608
 609         return 0;
 610 }
 611
 612 int wil_down(struct wil6210_priv *wil)
 613 {
 614         int rc;
 615
 616         mutex_lock(&wil->mutex);
 617         rc = __wil_down(wil);
 618         mutex_unlock(&wil->mutex);
 619
 620         return rc;
 621 }
 622
 623 int wil_find_cid(struct wil6210_priv *wil, const u8 *mac)
 624 {
 625         int i;
 626         int rc = -ENOENT;
 627
 628         for (i = 0; i < ARRAY_SIZE(wil->sta); i++) {
 629                 if ((wil->sta[i].status != wil_sta_unused) &&
 630                     ether_addr_equal(wil->sta[i].addr, mac)) {
 631                         rc = i;
 632                         break;
 633                 }
 634         }
 635
 636         return rc;
 637 }