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_reset(wil);
 225
 226                 /* need to re-allocate Rx ring after reset */
 227                 wil_rx_init(wil);
 228                 break;
 229         case NL80211_IFTYPE_AP:
 230         case NL80211_IFTYPE_P2P_GO:
 231                 /* recovery in these modes is done by upper layers */
 232                 break;
 233         default:
 234                 break;
 235         }
 236         mutex_unlock(&wil->mutex);
 237 }
 238
 239 static int wil_find_free_vring(struct wil6210_priv *wil)
 240 {
 241         int i;
 242
 243         for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
 244                 if (!wil->vring_tx[i].va)
 245                         return i;
 246         }
 247         return -EINVAL;
 248 }
 249
 250 static void wil_connect_worker(struct work_struct *work)
 251 {
 252         int rc;
 253         struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
 254                                                 connect_worker);
 255         int cid = wil->pending_connect_cid;
 256         int ringid = wil_find_free_vring(wil);
 257
 258         if (cid < 0) {
 259                 wil_err(wil, "No connection pending\n");
 260                 return;
 261         }
 262
 263         wil_dbg_wmi(wil, "Configure for connection CID %d\n", cid);
 264
 265         rc = wil_vring_init_tx(wil, ringid, WIL6210_TX_RING_SIZE, cid, 0);
 266         wil->pending_connect_cid = -1;
 267         if (rc == 0) {
 268                 wil->sta[cid].status = wil_sta_connected;
 269                 wil_link_on(wil);
 270         } else {
 271                 wil->sta[cid].status = wil_sta_unused;
 272         }
 273 }
 274
 275 int wil_priv_init(struct wil6210_priv *wil)
 276 {
 277         uint i;
 278
 279         wil_dbg_misc(wil, "%s()\n", __func__);
 280
 281         memset(wil->sta, 0, sizeof(wil->sta));
 282         for (i = 0; i < WIL6210_MAX_CID; i++)
 283                 spin_lock_init(&wil->sta[i].tid_rx_lock);
 284
 285         mutex_init(&wil->mutex);
 286         mutex_init(&wil->wmi_mutex);
 287
 288         init_completion(&wil->wmi_ready);
 289
 290         wil->pending_connect_cid = -1;
 291         setup_timer(&wil->connect_timer, wil_connect_timer_fn, (ulong)wil);
 292         setup_timer(&wil->scan_timer, wil_scan_timer_fn, (ulong)wil);
 293
 294         INIT_WORK(&wil->connect_worker, wil_connect_worker);
 295         INIT_WORK(&wil->disconnect_worker, wil_disconnect_worker);
 296         INIT_WORK(&wil->wmi_event_worker, wmi_event_worker);
 297         INIT_WORK(&wil->fw_error_worker, wil_fw_error_worker);
 298
 299         INIT_LIST_HEAD(&wil->pending_wmi_ev);
 300         spin_lock_init(&wil->wmi_ev_lock);
 301
 302         wil->wmi_wq = create_singlethread_workqueue(WIL_NAME"_wmi");
 303         if (!wil->wmi_wq)
 304                 return -EAGAIN;
 305
 306         wil->wmi_wq_conn = create_singlethread_workqueue(WIL_NAME"_connect");
 307         if (!wil->wmi_wq_conn) {
 308                 destroy_workqueue(wil->wmi_wq);
 309                 return -EAGAIN;
 310         }
 311
 312         wil->last_fw_recovery = jiffies;
 313
 314         return 0;
 315 }
 316
 317 void wil6210_disconnect(struct wil6210_priv *wil, const u8 *bssid)
 318 {
 319         wil_dbg_misc(wil, "%s()\n", __func__);
 320
 321         del_timer_sync(&wil->connect_timer);
 322         _wil6210_disconnect(wil, bssid);
 323 }
 324
 325 void wil_priv_deinit(struct wil6210_priv *wil)
 326 {
 327         wil_dbg_misc(wil, "%s()\n", __func__);
 328
 329         del_timer_sync(&wil->scan_timer);
 330         cancel_work_sync(&wil->disconnect_worker);
 331         cancel_work_sync(&wil->fw_error_worker);
 332         mutex_lock(&wil->mutex);
 333         wil6210_disconnect(wil, NULL);
 334         mutex_unlock(&wil->mutex);
 335         wmi_event_flush(wil);
 336         destroy_workqueue(wil->wmi_wq_conn);
 337         destroy_workqueue(wil->wmi_wq);
 338 }
 339
 340 /* target operations */
 341 /* register read */
 342 #define R(a) ioread32(wil->csr + HOSTADDR(a))
 343 /* register write. wmb() to make sure it is completed */
 344 #define W(a, v) do { iowrite32(v, wil->csr + HOSTADDR(a)); wmb(); } while (0)
 345 /* register set = read, OR, write */
 346 #define S(a, v) W(a, R(a) | v)
 347 /* register clear = read, AND with inverted, write */
 348 #define C(a, v) W(a, R(a) & ~v)
 349
 350 static inline void wil_halt_cpu(struct wil6210_priv *wil)
 351 {
 352         W(RGF_USER_USER_CPU_0, BIT_USER_USER_CPU_MAN_RST);
 353         W(RGF_USER_MAC_CPU_0,  BIT_USER_MAC_CPU_MAN_RST);
 354 }
 355
 356 static inline void wil_release_cpu(struct wil6210_priv *wil)
 357 {
 358         /* Start CPU */
 359         W(RGF_USER_USER_CPU_0, 1);
 360 }
 361
 362 static int wil_target_reset(struct wil6210_priv *wil)
 363 {
 364         int delay = 0;
 365         u32 hw_state;
 366         u32 rev_id;
 367         bool is_sparrow = (wil->board->board == WIL_BOARD_SPARROW);
 368
 369         wil_dbg_misc(wil, "Resetting \"%s\"...\n", wil->board->name);
 370
 371         wil->hw_version = R(RGF_USER_FW_REV_ID);
 372         rev_id = wil->hw_version & 0xff;
 373
 374         /* Clear MAC link up */
 375         S(RGF_HP_CTRL, BIT(15));
 376         S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT_HPAL_PERST_FROM_PAD);
 377         S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT_CAR_PERST_RST);
 378
 379         wil_halt_cpu(wil);
 380         C(RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_CAR_AHB_SW_SEL); /* 40 MHz */
 381
 382         if (is_sparrow) {
 383                 W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x3ff81f);
 384                 W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_1, 0xf);
 385         }
 386
 387         W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0xFE000000);
 388         W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0x0000003F);
 389         W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, is_sparrow ? 0x000000f0 : 0x00000170);
 390         W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0xFFE7FE00);
 391
 392         if (is_sparrow) {
 393                 W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x0);
 394                 W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_1, 0x0);
 395         }
 396
 397         W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0);
 398         W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0);
 399         W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0);
 400         W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
 401
 402         if (is_sparrow) {
 403                 W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000003);
 404                 /* reset A2 PCIE AHB */
 405                 W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00008000);
 406         } else {
 407                 W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000001);
 408                 if (rev_id == 1) {
 409                         /* reset A1 BOTH PCIE AHB & PCIE RGF */
 410                         W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00000080);
 411                 } else {
 412                         W(RGF_PCIE_LOS_COUNTER_CTL, BIT(6) | BIT(8));
 413                         W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00008000);
 414                 }
 415         }
 416
 417         /* TODO: check order here!!! Erez code is different */
 418         W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
 419
 420         /* wait until device ready. typical time is 200..250 msec */
 421         do {
 422                 msleep(RST_DELAY);
 423                 hw_state = R(RGF_USER_HW_MACHINE_STATE);
 424                 if (delay++ > RST_COUNT) {
 425                         wil_err(wil, "Reset not completed, hw_state 0x%08x\n",
 426                                 hw_state);
 427                         return -ETIME;
 428                 }
 429         } while (hw_state != HW_MACHINE_BOOT_DONE);
 430
 431         /* TODO: Erez check rev_id != 1 */
 432         if (!is_sparrow && (rev_id != 1))
 433                 W(RGF_PCIE_LOS_COUNTER_CTL, BIT(8));
 434
 435         C(RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_RST_PWGD);
 436
 437         wil_dbg_misc(wil, "Reset completed in %d ms\n", delay * RST_DELAY);
 438         return 0;
 439 }
 440
 441 #undef R
 442 #undef W
 443 #undef S
 444 #undef C
 445
 446 void wil_mbox_ring_le2cpus(struct wil6210_mbox_ring *r)
 447 {
 448         le32_to_cpus(&r->base);
 449         le16_to_cpus(&r->entry_size);
 450         le16_to_cpus(&r->size);
 451         le32_to_cpus(&r->tail);
 452         le32_to_cpus(&r->head);
 453 }
 454
 455 static int wil_wait_for_fw_ready(struct wil6210_priv *wil)
 456 {
 457         ulong to = msecs_to_jiffies(1000);
 458         ulong left = wait_for_completion_timeout(&wil->wmi_ready, to);
 459
 460         if (0 == left) {
 461                 wil_err(wil, "Firmware not ready\n");
 462                 return -ETIME;
 463         } else {
 464                 wil_info(wil, "FW ready after %d ms. HW version 0x%08x\n",
 465                          jiffies_to_msecs(to-left), wil->hw_version);
 466         }
 467         return 0;
 468 }
 469
 470 /*
 471  * We reset all the structures, and we reset the UMAC.
 472  * After calling this routine, you're expected to reload
 473  * the firmware.
 474  */
 475 int wil_reset(struct wil6210_priv *wil)
 476 {
 477         int rc;
 478
 479         wil_dbg_misc(wil, "%s()\n", __func__);
 480
 481         WARN_ON(!mutex_is_locked(&wil->mutex));
 482
 483         cancel_work_sync(&wil->disconnect_worker);
 484         wil6210_disconnect(wil, NULL);
 485
 486         wil->status = 0; /* prevent NAPI from being scheduled */
 487         if (test_bit(wil_status_napi_en, &wil->status))
 488                 napi_synchronize(&wil->napi_rx);
 489
 490         if (wil->scan_request) {
 491                 wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
 492                              wil->scan_request);
 493                 del_timer_sync(&wil->scan_timer);
 494                 cfg80211_scan_done(wil->scan_request, true);
 495                 wil->scan_request = NULL;
 496         }
 497
 498         wil6210_disable_irq(wil);
 499
 500         wmi_event_flush(wil);
 501
 502         flush_workqueue(wil->wmi_wq_conn);
 503         flush_workqueue(wil->wmi_wq);
 504
 505         rc = wil_target_reset(wil);
 506         wil_rx_fini(wil);
 507         if (rc)
 508                 return rc;
 509
 510         if (!no_fw_load) {
 511                 wil_info(wil, "Use firmware <%s>\n", WIL_FW_NAME);
 512                 wil_halt_cpu(wil);
 513                 /* Loading f/w from the file */
 514                 rc = wil_request_firmware(wil, WIL_FW_NAME);
 515                 if (rc)
 516                         return rc;
 517
 518                 /* clear any interrupts which on-card-firmware may have set */
 519                 wil6210_clear_irq(wil);
 520                 { /* CAF_ICR - clear and mask */
 521                         u32 a = HOSTADDR(RGF_CAF_ICR) +
 522                                 offsetof(struct RGF_ICR, ICR);
 523                         u32 m = HOSTADDR(RGF_CAF_ICR) +
 524                                 offsetof(struct RGF_ICR, IMV);
 525                         u32 icr = ioread32(wil->csr + a);
 526
 527                         iowrite32(icr, wil->csr + a); /* W1C */
 528                         iowrite32(~0, wil->csr + m);
 529                         wmb(); /* wait for completion */
 530                 }
 531                 wil_release_cpu(wil);
 532         } else {
 533                 wil_info(wil, "Use firmware from on-card flash\n");
 534         }
 535
 536         /* init after reset */
 537         wil->pending_connect_cid = -1;
 538         reinit_completion(&wil->wmi_ready);
 539
 540         wil6210_enable_irq(wil);
 541
 542         /* we just started MAC, wait for FW ready */
 543         rc = wil_wait_for_fw_ready(wil);
 544
 545         return rc;
 546 }
 547
 548 void wil_fw_error_recovery(struct wil6210_priv *wil)
 549 {
 550         wil_dbg_misc(wil, "starting fw error recovery\n");
 551         schedule_work(&wil->fw_error_worker);
 552 }
 553
 554 void wil_link_on(struct wil6210_priv *wil)
 555 {
 556         struct net_device *ndev = wil_to_ndev(wil);
 557
 558         wil_dbg_misc(wil, "%s()\n", __func__);
 559
 560         netif_carrier_on(ndev);
 561         wil_dbg_misc(wil, "netif_tx_wake : link on\n");
 562         netif_tx_wake_all_queues(ndev);
 563 }
 564
 565 void wil_link_off(struct wil6210_priv *wil)
 566 {
 567         struct net_device *ndev = wil_to_ndev(wil);
 568
 569         wil_dbg_misc(wil, "%s()\n", __func__);
 570
 571         netif_tx_stop_all_queues(ndev);
 572         wil_dbg_misc(wil, "netif_tx_stop : link off\n");
 573         netif_carrier_off(ndev);
 574 }
 575
 576 static int __wil_up(struct wil6210_priv *wil)
 577 {
 578         struct net_device *ndev = wil_to_ndev(wil);
 579         struct wireless_dev *wdev = wil->wdev;
 580         int rc;
 581
 582         WARN_ON(!mutex_is_locked(&wil->mutex));
 583
 584         rc = wil_reset(wil);
 585         if (rc)
 586                 return rc;
 587
 588         /* Rx VRING. After MAC and beacon */
 589         rc = wil_rx_init(wil);
 590         if (rc)
 591                 return rc;
 592
 593         switch (wdev->iftype) {
 594         case NL80211_IFTYPE_STATION:
 595                 wil_dbg_misc(wil, "type: STATION\n");
 596                 ndev->type = ARPHRD_ETHER;
 597                 break;
 598         case NL80211_IFTYPE_AP:
 599                 wil_dbg_misc(wil, "type: AP\n");
 600                 ndev->type = ARPHRD_ETHER;
 601                 break;
 602         case NL80211_IFTYPE_P2P_CLIENT:
 603                 wil_dbg_misc(wil, "type: P2P_CLIENT\n");
 604                 ndev->type = ARPHRD_ETHER;
 605                 break;
 606         case NL80211_IFTYPE_P2P_GO:
 607                 wil_dbg_misc(wil, "type: P2P_GO\n");
 608                 ndev->type = ARPHRD_ETHER;
 609                 break;
 610         case NL80211_IFTYPE_MONITOR:
 611                 wil_dbg_misc(wil, "type: Monitor\n");
 612                 ndev->type = ARPHRD_IEEE80211_RADIOTAP;
 613                 /* ARPHRD_IEEE80211 or ARPHRD_IEEE80211_RADIOTAP ? */
 614                 break;
 615         default:
 616                 return -EOPNOTSUPP;
 617         }
 618
 619         /* MAC address - pre-requisite for other commands */
 620         wmi_set_mac_address(wil, ndev->dev_addr);
 621
 622
 623         napi_enable(&wil->napi_rx);
 624         napi_enable(&wil->napi_tx);
 625         set_bit(wil_status_napi_en, &wil->status);
 626
 627         if (wil->platform_ops.bus_request)
 628                 wil->platform_ops.bus_request(wil->platform_handle,
 629                                               WIL_MAX_BUS_REQUEST_KBPS);
 630
 631         return 0;
 632 }
 633
 634 int wil_up(struct wil6210_priv *wil)
 635 {
 636         int rc;
 637
 638         wil_dbg_misc(wil, "%s()\n", __func__);
 639
 640         mutex_lock(&wil->mutex);
 641         rc = __wil_up(wil);
 642         mutex_unlock(&wil->mutex);
 643
 644         return rc;
 645 }
 646
 647 static int __wil_down(struct wil6210_priv *wil)
 648 {
 649         int iter = WAIT_FOR_DISCONNECT_TIMEOUT_MS /
 650                         WAIT_FOR_DISCONNECT_INTERVAL_MS;
 651
 652         WARN_ON(!mutex_is_locked(&wil->mutex));
 653
 654         if (wil->platform_ops.bus_request)
 655                 wil->platform_ops.bus_request(wil->platform_handle, 0);
 656
 657         clear_bit(wil_status_napi_en, &wil->status);
 658         napi_disable(&wil->napi_rx);
 659         napi_disable(&wil->napi_tx);
 660
 661         if (wil->scan_request) {
 662                 wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
 663                              wil->scan_request);
 664                 del_timer_sync(&wil->scan_timer);
 665                 cfg80211_scan_done(wil->scan_request, true);
 666                 wil->scan_request = NULL;
 667         }
 668
 669         if (test_bit(wil_status_fwconnected, &wil->status) ||
 670             test_bit(wil_status_fwconnecting, &wil->status))
 671                 wmi_send(wil, WMI_DISCONNECT_CMDID, NULL, 0);
 672
 673         /* make sure wil is idle (not connected) */
 674         mutex_unlock(&wil->mutex);
 675         while (iter--) {
 676                 int idle = !test_bit(wil_status_fwconnected, &wil->status) &&
 677                            !test_bit(wil_status_fwconnecting, &wil->status);
 678                 if (idle)
 679                         break;
 680                 msleep(WAIT_FOR_DISCONNECT_INTERVAL_MS);
 681         }
 682         mutex_lock(&wil->mutex);
 683
 684         if (!iter)
 685                 wil_err(wil, "timeout waiting for idle FW/HW\n");
 686
 687         wil_rx_fini(wil);
 688
 689         return 0;
 690 }
 691
 692 int wil_down(struct wil6210_priv *wil)
 693 {
 694         int rc;
 695
 696         wil_dbg_misc(wil, "%s()\n", __func__);
 697
 698         mutex_lock(&wil->mutex);
 699         rc = __wil_down(wil);
 700         mutex_unlock(&wil->mutex);
 701
 702         return rc;
 703 }
 704
 705 int wil_find_cid(struct wil6210_priv *wil, const u8 *mac)
 706 {
 707         int i;
 708         int rc = -ENOENT;
 709
 710         for (i = 0; i < ARRAY_SIZE(wil->sta); i++) {
 711                 if ((wil->sta[i].status != wil_sta_unused) &&
 712                     ether_addr_equal(wil->sta[i].addr, mac)) {
 713                         rc = i;
 714                         break;
 715                 }
 716         }
 717
 718         return rc;
 719 }