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 #include "wmi.h"
  24
  25 #define WAIT_FOR_DISCONNECT_TIMEOUT_MS 2000
  26 #define WAIT_FOR_DISCONNECT_INTERVAL_MS 10
  27
  28 static bool no_fw_recovery;
  29 module_param(no_fw_recovery, bool, S_IRUGO | S_IWUSR);
  30 MODULE_PARM_DESC(no_fw_recovery, " disable FW error recovery");
  31
  32 static bool no_fw_load = true;
  33 module_param(no_fw_load, bool, S_IRUGO | S_IWUSR);
  34 MODULE_PARM_DESC(no_fw_load, " do not download FW, use one in on-card flash.");
  35
  36 #define RST_DELAY (20) /* msec, for loop in @wil_target_reset */
  37 #define RST_COUNT (1 + 1000/RST_DELAY) /* round up to be above 1 sec total */
  38
  39 /*
  40  * Due to a hardware issue,
  41  * one has to read/write to/from NIC in 32-bit chunks;
  42  * regular memcpy_fromio and siblings will
  43  * not work on 64-bit platform - it uses 64-bit transactions
  44  *
  45  * Force 32-bit transactions to enable NIC on 64-bit platforms
  46  *
  47  * To avoid byte swap on big endian host, __raw_{read|write}l
  48  * should be used - {read|write}l would swap bytes to provide
  49  * little endian on PCI value in host endianness.
  50  */
  51 void wil_memcpy_fromio_32(void *dst, const volatile void __iomem *src,
  52                           size_t count)
  53 {
  54         u32 *d = dst;
  55         const volatile u32 __iomem *s = src;
  56
  57         /* size_t is unsigned, if (count%4 != 0) it will wrap */
  58         for (count += 4; count > 4; count -= 4)
  59                 *d++ = __raw_readl(s++);
  60 }
  61
  62 void wil_memcpy_toio_32(volatile void __iomem *dst, const void *src,
  63                         size_t count)
  64 {
  65         volatile u32 __iomem *d = dst;
  66         const u32 *s = src;
  67
  68         for (count += 4; count > 4; count -= 4)
  69                 __raw_writel(*s++, d++);
  70 }
  71
  72 static void wil_disconnect_cid(struct wil6210_priv *wil, int cid)
  73 {
  74         uint i;
  75         struct net_device *ndev = wil_to_ndev(wil);
  76         struct wireless_dev *wdev = wil->wdev;
  77         struct wil_sta_info *sta = &wil->sta[cid];
  78
  79         wil_dbg_misc(wil, "%s(CID %d, status %d)\n", __func__, cid,
  80                      sta->status);
  81
  82         sta->data_port_open = false;
  83         if (sta->status != wil_sta_unused) {
  84                 wmi_disconnect_sta(wil, sta->addr, WLAN_REASON_DEAUTH_LEAVING);
  85                 switch (wdev->iftype) {
  86                 case NL80211_IFTYPE_AP:
  87                 case NL80211_IFTYPE_P2P_GO:
  88                         /* AP-like interface */
  89                         cfg80211_del_sta(ndev, sta->addr, GFP_KERNEL);
  90                         break;
  91                 default:
  92                         break;
  93                 }
  94                 sta->status = wil_sta_unused;
  95         }
  96
  97         for (i = 0; i < WIL_STA_TID_NUM; i++) {
  98                 struct wil_tid_ampdu_rx *r;
  99                 unsigned long flags;
 100
 101                 spin_lock_irqsave(&sta->tid_rx_lock, flags);
 102
 103                 r = sta->tid_rx[i];
 104                 sta->tid_rx[i] = NULL;
 105                 wil_tid_ampdu_rx_free(wil, r);
 106
 107                 spin_unlock_irqrestore(&sta->tid_rx_lock, flags);
 108         }
 109         for (i = 0; i < ARRAY_SIZE(wil->vring_tx); i++) {
 110                 if (wil->vring2cid_tid[i][0] == cid)
 111                         wil_vring_fini_tx(wil, i);
 112         }
 113         memset(&sta->stats, 0, sizeof(sta->stats));
 114 }
 115
 116 static void _wil6210_disconnect(struct wil6210_priv *wil, const u8 *bssid)
 117 {
 118         int cid = -ENOENT;
 119         struct net_device *ndev = wil_to_ndev(wil);
 120         struct wireless_dev *wdev = wil->wdev;
 121
 122         might_sleep();
 123         if (bssid) {
 124                 cid = wil_find_cid(wil, bssid);
 125                 wil_dbg_misc(wil, "%s(%pM, CID %d)\n", __func__, bssid, cid);
 126         } else {
 127                 wil_dbg_misc(wil, "%s(all)\n", __func__);
 128         }
 129
 130         if (cid >= 0) /* disconnect 1 peer */
 131                 wil_disconnect_cid(wil, cid);
 132         else /* disconnect all */
 133                 for (cid = 0; cid < WIL6210_MAX_CID; cid++)
 134                         wil_disconnect_cid(wil, cid);
 135
 136         /* link state */
 137         switch (wdev->iftype) {
 138         case NL80211_IFTYPE_STATION:
 139         case NL80211_IFTYPE_P2P_CLIENT:
 140                 wil_link_off(wil);
 141                 if (test_bit(wil_status_fwconnected, &wil->status)) {
 142                         clear_bit(wil_status_fwconnected, &wil->status);
 143                         cfg80211_disconnected(ndev,
 144                                               WLAN_STATUS_UNSPECIFIED_FAILURE,
 145                                               NULL, 0, GFP_KERNEL);
 146                 } else if (test_bit(wil_status_fwconnecting, &wil->status)) {
 147                         cfg80211_connect_result(ndev, bssid, NULL, 0, NULL, 0,
 148                                                 WLAN_STATUS_UNSPECIFIED_FAILURE,
 149                                                 GFP_KERNEL);
 150                 }
 151                 clear_bit(wil_status_fwconnecting, &wil->status);
 152                 break;
 153         default:
 154                 break;
 155         }
 156 }
 157
 158 static void wil_disconnect_worker(struct work_struct *work)
 159 {
 160         struct wil6210_priv *wil = container_of(work,
 161                         struct wil6210_priv, disconnect_worker);
 162
 163         mutex_lock(&wil->mutex);
 164         _wil6210_disconnect(wil, NULL);
 165         mutex_unlock(&wil->mutex);
 166 }
 167
 168 static void wil_connect_timer_fn(ulong x)
 169 {
 170         struct wil6210_priv *wil = (void *)x;
 171
 172         wil_dbg_misc(wil, "Connect timeout\n");
 173
 174         /* reschedule to thread context - disconnect won't
 175          * run from atomic context
 176          */
 177         schedule_work(&wil->disconnect_worker);
 178 }
 179
 180 static void wil_scan_timer_fn(ulong x)
 181 {
 182         struct wil6210_priv *wil = (void *)x;
 183
 184         clear_bit(wil_status_fwready, &wil->status);
 185         wil_err(wil, "Scan timeout detected, start fw error recovery\n");
 186         schedule_work(&wil->fw_error_worker);
 187 }
 188
 189 static void wil_fw_error_worker(struct work_struct *work)
 190 {
 191         struct wil6210_priv *wil = container_of(work,
 192                         struct wil6210_priv, fw_error_worker);
 193         struct wireless_dev *wdev = wil->wdev;
 194
 195         wil_dbg_misc(wil, "fw error worker\n");
 196
 197         if (no_fw_recovery)
 198                 return;
 199
 200         /* increment @recovery_count if less then WIL6210_FW_RECOVERY_TO
 201          * passed since last recovery attempt
 202          */
 203         if (time_is_after_jiffies(wil->last_fw_recovery +
 204                                   WIL6210_FW_RECOVERY_TO))
 205                 wil->recovery_count++;
 206         else
 207                 wil->recovery_count = 1; /* fw was alive for a long time */
 208
 209         if (wil->recovery_count > WIL6210_FW_RECOVERY_RETRIES) {
 210                 wil_err(wil, "too many recovery attempts (%d), giving up\n",
 211                         wil->recovery_count);
 212                 return;
 213         }
 214
 215         wil->last_fw_recovery = jiffies;
 216
 217         mutex_lock(&wil->mutex);
 218         switch (wdev->iftype) {
 219         case NL80211_IFTYPE_STATION:
 220         case NL80211_IFTYPE_P2P_CLIENT:
 221         case NL80211_IFTYPE_MONITOR:
 222                 wil_info(wil, "fw error recovery started (try %d)...\n",
 223                          wil->recovery_count);
 224                 __wil_down(wil);
 225                 __wil_up(wil);
 226                 break;
 227         case NL80211_IFTYPE_AP:
 228         case NL80211_IFTYPE_P2P_GO:
 229                 /* recovery in these modes is done by upper layers */
 230                 break;
 231         default:
 232                 break;
 233         }
 234         mutex_unlock(&wil->mutex);
 235 }
 236
 237 static int wil_find_free_vring(struct wil6210_priv *wil)
 238 {
 239         int i;
 240
 241         for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
 242                 if (!wil->vring_tx[i].va)
 243                         return i;
 244         }
 245         return -EINVAL;
 246 }
 247
 248 static void wil_connect_worker(struct work_struct *work)
 249 {
 250         int rc;
 251         struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
 252                                                 connect_worker);
 253         int cid = wil->pending_connect_cid;
 254         int ringid = wil_find_free_vring(wil);
 255
 256         if (cid < 0) {
 257                 wil_err(wil, "No connection pending\n");
 258                 return;
 259         }
 260
 261         wil_dbg_wmi(wil, "Configure for connection CID %d\n", cid);
 262
 263         rc = wil_vring_init_tx(wil, ringid, WIL6210_TX_RING_SIZE, cid, 0);
 264         wil->pending_connect_cid = -1;
 265         if (rc == 0) {
 266                 wil->sta[cid].status = wil_sta_connected;
 267                 wil_link_on(wil);
 268         } else {
 269                 wil->sta[cid].status = wil_sta_unused;
 270         }
 271 }
 272
 273 int wil_priv_init(struct wil6210_priv *wil)
 274 {
 275         uint i;
 276
 277         wil_dbg_misc(wil, "%s()\n", __func__);
 278
 279         memset(wil->sta, 0, sizeof(wil->sta));
 280         for (i = 0; i < WIL6210_MAX_CID; i++)
 281                 spin_lock_init(&wil->sta[i].tid_rx_lock);
 282
 283         mutex_init(&wil->mutex);
 284         mutex_init(&wil->wmi_mutex);
 285
 286         init_completion(&wil->wmi_ready);
 287         init_completion(&wil->wmi_call);
 288
 289         wil->pending_connect_cid = -1;
 290         setup_timer(&wil->connect_timer, wil_connect_timer_fn, (ulong)wil);
 291         setup_timer(&wil->scan_timer, wil_scan_timer_fn, (ulong)wil);
 292
 293         INIT_WORK(&wil->connect_worker, wil_connect_worker);
 294         INIT_WORK(&wil->disconnect_worker, wil_disconnect_worker);
 295         INIT_WORK(&wil->wmi_event_worker, wmi_event_worker);
 296         INIT_WORK(&wil->fw_error_worker, wil_fw_error_worker);
 297
 298         INIT_LIST_HEAD(&wil->pending_wmi_ev);
 299         spin_lock_init(&wil->wmi_ev_lock);
 300
 301         wil->wmi_wq = create_singlethread_workqueue(WIL_NAME"_wmi");
 302         if (!wil->wmi_wq)
 303                 return -EAGAIN;
 304
 305         wil->wmi_wq_conn = create_singlethread_workqueue(WIL_NAME"_connect");
 306         if (!wil->wmi_wq_conn) {
 307                 destroy_workqueue(wil->wmi_wq);
 308                 return -EAGAIN;
 309         }
 310
 311         wil->last_fw_recovery = jiffies;
 312
 313         return 0;
 314 }
 315
 316 void wil6210_disconnect(struct wil6210_priv *wil, const u8 *bssid)
 317 {
 318         wil_dbg_misc(wil, "%s()\n", __func__);
 319
 320         del_timer_sync(&wil->connect_timer);
 321         _wil6210_disconnect(wil, bssid);
 322 }
 323
 324 void wil_priv_deinit(struct wil6210_priv *wil)
 325 {
 326         wil_dbg_misc(wil, "%s()\n", __func__);
 327
 328         del_timer_sync(&wil->scan_timer);
 329         cancel_work_sync(&wil->disconnect_worker);
 330         cancel_work_sync(&wil->fw_error_worker);
 331         mutex_lock(&wil->mutex);
 332         wil6210_disconnect(wil, NULL);
 333         mutex_unlock(&wil->mutex);
 334         wmi_event_flush(wil);
 335         destroy_workqueue(wil->wmi_wq_conn);
 336         destroy_workqueue(wil->wmi_wq);
 337 }
 338
 339 /* target operations */
 340 /* register read */
 341 #define R(a) ioread32(wil->csr + HOSTADDR(a))
 342 /* register write. wmb() to make sure it is completed */
 343 #define W(a, v) do { iowrite32(v, wil->csr + HOSTADDR(a)); wmb(); } while (0)
 344 /* register set = read, OR, write */
 345 #define S(a, v) W(a, R(a) | v)
 346 /* register clear = read, AND with inverted, write */
 347 #define C(a, v) W(a, R(a) & ~v)
 348
 349 static inline void wil_halt_cpu(struct wil6210_priv *wil)
 350 {
 351         W(RGF_USER_USER_CPU_0, BIT_USER_USER_CPU_MAN_RST);
 352         W(RGF_USER_MAC_CPU_0,  BIT_USER_MAC_CPU_MAN_RST);
 353 }
 354
 355 static inline void wil_release_cpu(struct wil6210_priv *wil)
 356 {
 357         /* Start CPU */
 358         W(RGF_USER_USER_CPU_0, 1);
 359 }
 360
 361 static int wil_target_reset(struct wil6210_priv *wil)
 362 {
 363         int delay = 0;
 364         u32 hw_state;
 365         u32 rev_id;
 366         bool is_sparrow = (wil->board->board == WIL_BOARD_SPARROW);
 367
 368         wil_dbg_misc(wil, "Resetting \"%s\"...\n", wil->board->name);
 369
 370         wil->hw_version = R(RGF_USER_FW_REV_ID);
 371         rev_id = wil->hw_version & 0xff;
 372
 373         /* Clear MAC link up */
 374         S(RGF_HP_CTRL, BIT(15));
 375         S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT_HPAL_PERST_FROM_PAD);
 376         S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT_CAR_PERST_RST);
 377
 378         wil_halt_cpu(wil);
 379         C(RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_CAR_AHB_SW_SEL); /* 40 MHz */
 380
 381         if (is_sparrow) {
 382                 W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x3ff81f);
 383                 W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_1, 0xf);
 384         }
 385
 386         W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0xFE000000);
 387         W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0x0000003F);
 388         W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, is_sparrow ? 0x000000f0 : 0x00000170);
 389         W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0xFFE7FE00);
 390
 391         if (is_sparrow) {
 392                 W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x0);
 393                 W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_1, 0x0);
 394         }
 395
 396         W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0);
 397         W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0);
 398         W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0);
 399         W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
 400
 401         if (is_sparrow) {
 402                 W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000003);
 403                 /* reset A2 PCIE AHB */
 404                 W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00008000);
 405         } else {
 406                 W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000001);
 407                 if (rev_id == 1) {
 408                         /* reset A1 BOTH PCIE AHB & PCIE RGF */
 409                         W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00000080);
 410                 } else {
 411                         W(RGF_PCIE_LOS_COUNTER_CTL, BIT(6) | BIT(8));
 412                         W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00008000);
 413                 }
 414         }
 415
 416         /* TODO: check order here!!! Erez code is different */
 417         W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
 418
 419         /* wait until device ready. typical time is 200..250 msec */
 420         do {
 421                 msleep(RST_DELAY);
 422                 hw_state = R(RGF_USER_HW_MACHINE_STATE);
 423                 if (delay++ > RST_COUNT) {
 424                         wil_err(wil, "Reset not completed, hw_state 0x%08x\n",
 425                                 hw_state);
 426                         return -ETIME;
 427                 }
 428         } while (hw_state != HW_MACHINE_BOOT_DONE);
 429
 430         /* TODO: Erez check rev_id != 1 */
 431         if (!is_sparrow && (rev_id != 1))
 432                 W(RGF_PCIE_LOS_COUNTER_CTL, BIT(8));
 433
 434         C(RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_RST_PWGD);
 435
 436         wil_dbg_misc(wil, "Reset completed in %d ms\n", delay * RST_DELAY);
 437         return 0;
 438 }
 439
 440 #undef R
 441 #undef W
 442 #undef S
 443 #undef C
 444
 445 void wil_mbox_ring_le2cpus(struct wil6210_mbox_ring *r)
 446 {
 447         le32_to_cpus(&r->base);
 448         le16_to_cpus(&r->entry_size);
 449         le16_to_cpus(&r->size);
 450         le32_to_cpus(&r->tail);
 451         le32_to_cpus(&r->head);
 452 }
 453
 454 static int wil_wait_for_fw_ready(struct wil6210_priv *wil)
 455 {
 456         ulong to = msecs_to_jiffies(1000);
 457         ulong left = wait_for_completion_timeout(&wil->wmi_ready, to);
 458
 459         if (0 == left) {
 460                 wil_err(wil, "Firmware not ready\n");
 461                 return -ETIME;
 462         } else {
 463                 wil_info(wil, "FW ready after %d ms. HW version 0x%08x\n",
 464                          jiffies_to_msecs(to-left), wil->hw_version);
 465         }
 466         return 0;
 467 }
 468
 469 /*
 470  * We reset all the structures, and we reset the UMAC.
 471  * After calling this routine, you're expected to reload
 472  * the firmware.
 473  */
 474 int wil_reset(struct wil6210_priv *wil)
 475 {
 476         int rc;
 477
 478         wil_dbg_misc(wil, "%s()\n", __func__);
 479
 480         WARN_ON(!mutex_is_locked(&wil->mutex));
 481         WARN_ON(test_bit(wil_status_napi_en, &wil->status));
 482
 483         cancel_work_sync(&wil->disconnect_worker);
 484         wil6210_disconnect(wil, NULL);
 485
 486         wil->status = 0; /* prevent NAPI from being scheduled */
 487
 488         if (wil->scan_request) {
 489                 wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
 490                              wil->scan_request);
 491                 del_timer_sync(&wil->scan_timer);
 492                 cfg80211_scan_done(wil->scan_request, true);
 493                 wil->scan_request = NULL;
 494         }
 495
 496         wil_mask_irq(wil);
 497
 498         wmi_event_flush(wil);
 499
 500         flush_workqueue(wil->wmi_wq_conn);
 501         flush_workqueue(wil->wmi_wq);
 502
 503         rc = wil_target_reset(wil);
 504         wil_rx_fini(wil);
 505         if (rc)
 506                 return rc;
 507
 508         if (!no_fw_load) {
 509                 wil_info(wil, "Use firmware <%s>\n", WIL_FW_NAME);
 510                 wil_halt_cpu(wil);
 511                 /* Loading f/w from the file */
 512                 rc = wil_request_firmware(wil, WIL_FW_NAME);
 513                 if (rc)
 514                         return rc;
 515
 516                 /* clear any interrupts which on-card-firmware may have set */
 517                 wil6210_clear_irq(wil);
 518                 { /* CAF_ICR - clear and mask */
 519                         u32 a = HOSTADDR(RGF_CAF_ICR) +
 520                                 offsetof(struct RGF_ICR, ICR);
 521                         u32 m = HOSTADDR(RGF_CAF_ICR) +
 522                                 offsetof(struct RGF_ICR, IMV);
 523                         u32 icr = ioread32(wil->csr + a);
 524
 525                         iowrite32(icr, wil->csr + a); /* W1C */
 526                         iowrite32(~0, wil->csr + m);
 527                         wmb(); /* wait for completion */
 528                 }
 529                 wil_release_cpu(wil);
 530         } else {
 531                 wil_info(wil, "Use firmware from on-card flash\n");
 532         }
 533
 534         /* init after reset */
 535         wil->pending_connect_cid = -1;
 536         reinit_completion(&wil->wmi_ready);
 537         reinit_completion(&wil->wmi_call);
 538
 539         wil_unmask_irq(wil);
 540
 541         /* we just started MAC, wait for FW ready */
 542         rc = wil_wait_for_fw_ready(wil);
 543
 544         return rc;
 545 }
 546
 547 void wil_fw_error_recovery(struct wil6210_priv *wil)
 548 {
 549         wil_dbg_misc(wil, "starting fw error recovery\n");
 550         schedule_work(&wil->fw_error_worker);
 551 }
 552
 553 void wil_link_on(struct wil6210_priv *wil)
 554 {
 555         struct net_device *ndev = wil_to_ndev(wil);
 556
 557         wil_dbg_misc(wil, "%s()\n", __func__);
 558
 559         netif_carrier_on(ndev);
 560         wil_dbg_misc(wil, "netif_tx_wake : link on\n");
 561         netif_tx_wake_all_queues(ndev);
 562 }
 563
 564 void wil_link_off(struct wil6210_priv *wil)
 565 {
 566         struct net_device *ndev = wil_to_ndev(wil);
 567
 568         wil_dbg_misc(wil, "%s()\n", __func__);
 569
 570         netif_tx_stop_all_queues(ndev);
 571         wil_dbg_misc(wil, "netif_tx_stop : link off\n");
 572         netif_carrier_off(ndev);
 573 }
 574
 575 int __wil_up(struct wil6210_priv *wil)
 576 {
 577         struct net_device *ndev = wil_to_ndev(wil);
 578         struct wireless_dev *wdev = wil->wdev;
 579         int rc;
 580
 581         WARN_ON(!mutex_is_locked(&wil->mutex));
 582
 583         rc = wil_reset(wil);
 584         if (rc)
 585                 return rc;
 586
 587         /* Rx VRING. After MAC and beacon */
 588         rc = wil_rx_init(wil);
 589         if (rc)
 590                 return rc;
 591
 592         switch (wdev->iftype) {
 593         case NL80211_IFTYPE_STATION:
 594                 wil_dbg_misc(wil, "type: STATION\n");
 595                 ndev->type = ARPHRD_ETHER;
 596                 break;
 597         case NL80211_IFTYPE_AP:
 598                 wil_dbg_misc(wil, "type: AP\n");
 599                 ndev->type = ARPHRD_ETHER;
 600                 break;
 601         case NL80211_IFTYPE_P2P_CLIENT:
 602                 wil_dbg_misc(wil, "type: P2P_CLIENT\n");
 603                 ndev->type = ARPHRD_ETHER;
 604                 break;
 605         case NL80211_IFTYPE_P2P_GO:
 606                 wil_dbg_misc(wil, "type: P2P_GO\n");
 607                 ndev->type = ARPHRD_ETHER;
 608                 break;
 609         case NL80211_IFTYPE_MONITOR:
 610                 wil_dbg_misc(wil, "type: Monitor\n");
 611                 ndev->type = ARPHRD_IEEE80211_RADIOTAP;
 612                 /* ARPHRD_IEEE80211 or ARPHRD_IEEE80211_RADIOTAP ? */
 613                 break;
 614         default:
 615                 return -EOPNOTSUPP;
 616         }
 617
 618         /* MAC address - pre-requisite for other commands */
 619         wmi_set_mac_address(wil, ndev->dev_addr);
 620
 621         wil_dbg_misc(wil, "NAPI enable\n");
 622         napi_enable(&wil->napi_rx);
 623         napi_enable(&wil->napi_tx);
 624         set_bit(wil_status_napi_en, &wil->status);
 625
 626         if (wil->platform_ops.bus_request)
 627                 wil->platform_ops.bus_request(wil->platform_handle,
 628                                               WIL_MAX_BUS_REQUEST_KBPS);
 629
 630         return 0;
 631 }
 632
 633 int wil_up(struct wil6210_priv *wil)
 634 {
 635         int rc;
 636
 637         wil_dbg_misc(wil, "%s()\n", __func__);
 638
 639         mutex_lock(&wil->mutex);
 640         rc = __wil_up(wil);
 641         mutex_unlock(&wil->mutex);
 642
 643         return rc;
 644 }
 645
 646 int __wil_down(struct wil6210_priv *wil)
 647 {
 648         int iter = WAIT_FOR_DISCONNECT_TIMEOUT_MS /
 649                         WAIT_FOR_DISCONNECT_INTERVAL_MS;
 650
 651         WARN_ON(!mutex_is_locked(&wil->mutex));
 652
 653         if (wil->platform_ops.bus_request)
 654                 wil->platform_ops.bus_request(wil->platform_handle, 0);
 655
 656         wil_disable_irq(wil);
 657         if (test_and_clear_bit(wil_status_napi_en, &wil->status)) {
 658                 napi_disable(&wil->napi_rx);
 659                 napi_disable(&wil->napi_tx);
 660                 wil_dbg_misc(wil, "NAPI disable\n");
 661         }
 662         wil_enable_irq(wil);
 663
 664         if (wil->scan_request) {
 665                 wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
 666                              wil->scan_request);
 667                 del_timer_sync(&wil->scan_timer);
 668                 cfg80211_scan_done(wil->scan_request, true);
 669                 wil->scan_request = NULL;
 670         }
 671
 672         if (test_bit(wil_status_fwconnected, &wil->status) ||
 673             test_bit(wil_status_fwconnecting, &wil->status))
 674                 wmi_send(wil, WMI_DISCONNECT_CMDID, NULL, 0);
 675
 676         /* make sure wil is idle (not connected) */
 677         mutex_unlock(&wil->mutex);
 678         while (iter--) {
 679                 int idle = !test_bit(wil_status_fwconnected, &wil->status) &&
 680                            !test_bit(wil_status_fwconnecting, &wil->status);
 681                 if (idle)
 682                         break;
 683                 msleep(WAIT_FOR_DISCONNECT_INTERVAL_MS);
 684         }
 685         mutex_lock(&wil->mutex);
 686
 687         if (!iter)
 688                 wil_err(wil, "timeout waiting for idle FW/HW\n");
 689
 690         wil_rx_fini(wil);
 691
 692         return 0;
 693 }
 694
 695 int wil_down(struct wil6210_priv *wil)
 696 {
 697         int rc;
 698
 699         wil_dbg_misc(wil, "%s()\n", __func__);
 700
 701         mutex_lock(&wil->mutex);
 702         rc = __wil_down(wil);
 703         mutex_unlock(&wil->mutex);
 704
 705         return rc;
 706 }
 707
 708 int wil_find_cid(struct wil6210_priv *wil, const u8 *mac)
 709 {
 710         int i;
 711         int rc = -ENOENT;
 712
 713         for (i = 0; i < ARRAY_SIZE(wil->sta); i++) {
 714                 if ((wil->sta[i].status != wil_sta_unused) &&
 715                     ether_addr_equal(wil->sta[i].addr, mac)) {
 716                         rc = i;
 717                         break;
 718                 }
 719         }
 720
 721         return rc;
 722 }