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

   1 /*
   2  * Copyright (c) 2012-2015 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 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 bool no_fw_recovery;
  33 module_param(no_fw_recovery, bool, S_IRUGO | S_IWUSR);
  34 MODULE_PARM_DESC(no_fw_recovery, " disable automatic FW error recovery");
  35
  36 /* if not set via modparam, will be set to default value of 1/8 of
  37  * rx ring size during init flow
  38  */
  39 unsigned short rx_ring_overflow_thrsh = WIL6210_RX_HIGH_TRSH_INIT;
  40 module_param(rx_ring_overflow_thrsh, ushort, S_IRUGO);
  41 MODULE_PARM_DESC(rx_ring_overflow_thrsh,
  42                  " RX ring overflow threshold in descriptors.");
  43
  44 /* We allow allocation of more than 1 page buffers to support large packets.
  45  * It is suboptimal behavior performance wise in case MTU above page size.
  46  */
  47 unsigned int mtu_max = TXRX_BUF_LEN_DEFAULT - WIL_MAX_MPDU_OVERHEAD;
  48 static int mtu_max_set(const char *val, const struct kernel_param *kp)
  49 {
  50         int ret;
  51
  52         /* sets mtu_max directly. no need to restore it in case of
  53          * illegal value since we assume this will fail insmod
  54          */
  55         ret = param_set_uint(val, kp);
  56         if (ret)
  57                 return ret;
  58
  59         if (mtu_max < 68 || mtu_max > WIL_MAX_ETH_MTU)
  60                 ret = -EINVAL;
  61
  62         return ret;
  63 }
  64
  65 static const struct kernel_param_ops mtu_max_ops = {
  66         .set = mtu_max_set,
  67         .get = param_get_uint,
  68 };
  69
  70 module_param_cb(mtu_max, &mtu_max_ops, &mtu_max, S_IRUGO);
  71 MODULE_PARM_DESC(mtu_max, " Max MTU value.");
  72
  73 static uint rx_ring_order = WIL_RX_RING_SIZE_ORDER_DEFAULT;
  74 static uint tx_ring_order = WIL_TX_RING_SIZE_ORDER_DEFAULT;
  75 static uint bcast_ring_order = WIL_BCAST_RING_SIZE_ORDER_DEFAULT;
  76
  77 static int ring_order_set(const char *val, const struct kernel_param *kp)
  78 {
  79         int ret;
  80         uint x;
  81
  82         ret = kstrtouint(val, 0, &x);
  83         if (ret)
  84                 return ret;
  85
  86         if ((x < WIL_RING_SIZE_ORDER_MIN) || (x > WIL_RING_SIZE_ORDER_MAX))
  87                 return -EINVAL;
  88
  89         *((uint *)kp->arg) = x;
  90
  91         return 0;
  92 }
  93
  94 static const struct kernel_param_ops ring_order_ops = {
  95         .set = ring_order_set,
  96         .get = param_get_uint,
  97 };
  98
  99 module_param_cb(rx_ring_order, &ring_order_ops, &rx_ring_order, S_IRUGO);
 100 MODULE_PARM_DESC(rx_ring_order, " Rx ring order; size = 1 << order");
 101 module_param_cb(tx_ring_order, &ring_order_ops, &tx_ring_order, S_IRUGO);
 102 MODULE_PARM_DESC(tx_ring_order, " Tx ring order; size = 1 << order");
 103 module_param_cb(bcast_ring_order, &ring_order_ops, &bcast_ring_order, S_IRUGO);
 104 MODULE_PARM_DESC(bcast_ring_order, " Bcast ring order; size = 1 << order");
 105
 106 #define RST_DELAY (20) /* msec, for loop in @wil_target_reset */
 107 #define RST_COUNT (1 + 1000/RST_DELAY) /* round up to be above 1 sec total */
 108
 109 /*
 110  * Due to a hardware issue,
 111  * one has to read/write to/from NIC in 32-bit chunks;
 112  * regular memcpy_fromio and siblings will
 113  * not work on 64-bit platform - it uses 64-bit transactions
 114  *
 115  * Force 32-bit transactions to enable NIC on 64-bit platforms
 116  *
 117  * To avoid byte swap on big endian host, __raw_{read|write}l
 118  * should be used - {read|write}l would swap bytes to provide
 119  * little endian on PCI value in host endianness.
 120  */
 121 void wil_memcpy_fromio_32(void *dst, const volatile void __iomem *src,
 122                           size_t count)
 123 {
 124         u32 *d = dst;
 125         const volatile u32 __iomem *s = src;
 126
 127         /* size_t is unsigned, if (count%4 != 0) it will wrap */
 128         for (count += 4; count > 4; count -= 4)
 129                 *d++ = __raw_readl(s++);
 130 }
 131
 132 void wil_memcpy_toio_32(volatile void __iomem *dst, const void *src,
 133                         size_t count)
 134 {
 135         volatile u32 __iomem *d = dst;
 136         const u32 *s = src;
 137
 138         for (count += 4; count > 4; count -= 4)
 139                 __raw_writel(*s++, d++);
 140 }
 141
 142 static void wil_disconnect_cid(struct wil6210_priv *wil, int cid,
 143                                u16 reason_code, bool from_event)
 144 __acquires(&sta->tid_rx_lock) __releases(&sta->tid_rx_lock)
 145 {
 146         uint i;
 147         struct net_device *ndev = wil_to_ndev(wil);
 148         struct wireless_dev *wdev = wil->wdev;
 149         struct wil_sta_info *sta = &wil->sta[cid];
 150
 151         might_sleep();
 152         wil_dbg_misc(wil, "%s(CID %d, status %d)\n", __func__, cid,
 153                      sta->status);
 154
 155         if (sta->status != wil_sta_unused) {
 156                 if (!from_event)
 157                         wmi_disconnect_sta(wil, sta->addr, reason_code);
 158
 159                 switch (wdev->iftype) {
 160                 case NL80211_IFTYPE_AP:
 161                 case NL80211_IFTYPE_P2P_GO:
 162                         /* AP-like interface */
 163                         cfg80211_del_sta(ndev, sta->addr, GFP_KERNEL);
 164                         break;
 165                 default:
 166                         break;
 167                 }
 168                 sta->status = wil_sta_unused;
 169         }
 170
 171         for (i = 0; i < WIL_STA_TID_NUM; i++) {
 172                 struct wil_tid_ampdu_rx *r;
 173
 174                 spin_lock_bh(&sta->tid_rx_lock);
 175
 176                 r = sta->tid_rx[i];
 177                 sta->tid_rx[i] = NULL;
 178                 wil_tid_ampdu_rx_free(wil, r);
 179
 180                 spin_unlock_bh(&sta->tid_rx_lock);
 181         }
 182         for (i = 0; i < ARRAY_SIZE(wil->vring_tx); i++) {
 183                 if (wil->vring2cid_tid[i][0] == cid)
 184                         wil_vring_fini_tx(wil, i);
 185         }
 186         memset(&sta->stats, 0, sizeof(sta->stats));
 187 }
 188
 189 static void _wil6210_disconnect(struct wil6210_priv *wil, const u8 *bssid,
 190                                 u16 reason_code, bool from_event)
 191 {
 192         int cid = -ENOENT;
 193         struct net_device *ndev = wil_to_ndev(wil);
 194         struct wireless_dev *wdev = wil->wdev;
 195
 196         might_sleep();
 197         wil_dbg_misc(wil, "%s(bssid=%pM, reason=%d, ev%s)\n", __func__, bssid,
 198                      reason_code, from_event ? "+" : "-");
 199
 200         /* Cases are:
 201          * - disconnect single STA, still connected
 202          * - disconnect single STA, already disconnected
 203          * - disconnect all
 204          *
 205          * For "disconnect all", there are 2 options:
 206          * - bssid == NULL
 207          * - bssid is our MAC address
 208          */
 209         if (bssid && memcmp(ndev->dev_addr, bssid, ETH_ALEN)) {
 210                 cid = wil_find_cid(wil, bssid);
 211                 wil_dbg_misc(wil, "Disconnect %pM, CID=%d, reason=%d\n",
 212                              bssid, cid, reason_code);
 213                 if (cid >= 0) /* disconnect 1 peer */
 214                         wil_disconnect_cid(wil, cid, reason_code, from_event);
 215         } else { /* all */
 216                 wil_dbg_misc(wil, "Disconnect all\n");
 217                 for (cid = 0; cid < WIL6210_MAX_CID; cid++)
 218                         wil_disconnect_cid(wil, cid, reason_code, from_event);
 219         }
 220
 221         /* link state */
 222         switch (wdev->iftype) {
 223         case NL80211_IFTYPE_STATION:
 224         case NL80211_IFTYPE_P2P_CLIENT:
 225                 wil_bcast_fini(wil);
 226                 netif_tx_stop_all_queues(ndev);
 227                 netif_carrier_off(ndev);
 228
 229                 if (test_bit(wil_status_fwconnected, wil->status)) {
 230                         clear_bit(wil_status_fwconnected, wil->status);
 231                         cfg80211_disconnected(ndev, reason_code,
 232                                               NULL, 0, false, GFP_KERNEL);
 233                 } else if (test_bit(wil_status_fwconnecting, wil->status)) {
 234                         cfg80211_connect_result(ndev, bssid, NULL, 0, NULL, 0,
 235                                                 WLAN_STATUS_UNSPECIFIED_FAILURE,
 236                                                 GFP_KERNEL);
 237                 }
 238                 clear_bit(wil_status_fwconnecting, wil->status);
 239                 break;
 240         default:
 241                 break;
 242         }
 243 }
 244
 245 static void wil_disconnect_worker(struct work_struct *work)
 246 {
 247         struct wil6210_priv *wil = container_of(work,
 248                         struct wil6210_priv, disconnect_worker);
 249
 250         mutex_lock(&wil->mutex);
 251         _wil6210_disconnect(wil, NULL, WLAN_REASON_UNSPECIFIED, false);
 252         mutex_unlock(&wil->mutex);
 253 }
 254
 255 static void wil_connect_timer_fn(ulong x)
 256 {
 257         struct wil6210_priv *wil = (void *)x;
 258
 259         wil_dbg_misc(wil, "Connect timeout\n");
 260
 261         /* reschedule to thread context - disconnect won't
 262          * run from atomic context
 263          */
 264         schedule_work(&wil->disconnect_worker);
 265 }
 266
 267 static void wil_scan_timer_fn(ulong x)
 268 {
 269         struct wil6210_priv *wil = (void *)x;
 270
 271         clear_bit(wil_status_fwready, wil->status);
 272         wil_err(wil, "Scan timeout detected, start fw error recovery\n");
 273         wil->recovery_state = fw_recovery_pending;
 274         schedule_work(&wil->fw_error_worker);
 275 }
 276
 277 static int wil_wait_for_recovery(struct wil6210_priv *wil)
 278 {
 279         if (wait_event_interruptible(wil->wq, wil->recovery_state !=
 280                                      fw_recovery_pending)) {
 281                 wil_err(wil, "Interrupt, canceling recovery\n");
 282                 return -ERESTARTSYS;
 283         }
 284         if (wil->recovery_state != fw_recovery_running) {
 285                 wil_info(wil, "Recovery cancelled\n");
 286                 return -EINTR;
 287         }
 288         wil_info(wil, "Proceed with recovery\n");
 289         return 0;
 290 }
 291
 292 void wil_set_recovery_state(struct wil6210_priv *wil, int state)
 293 {
 294         wil_dbg_misc(wil, "%s(%d -> %d)\n", __func__,
 295                      wil->recovery_state, state);
 296
 297         wil->recovery_state = state;
 298         wake_up_interruptible(&wil->wq);
 299 }
 300
 301 static void wil_fw_error_worker(struct work_struct *work)
 302 {
 303         struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
 304                                                 fw_error_worker);
 305         struct wireless_dev *wdev = wil->wdev;
 306
 307         wil_dbg_misc(wil, "fw error worker\n");
 308
 309         if (!netif_running(wil_to_ndev(wil))) {
 310                 wil_info(wil, "No recovery - interface is down\n");
 311                 return;
 312         }
 313
 314         /* increment @recovery_count if less then WIL6210_FW_RECOVERY_TO
 315          * passed since last recovery attempt
 316          */
 317         if (time_is_after_jiffies(wil->last_fw_recovery +
 318                                   WIL6210_FW_RECOVERY_TO))
 319                 wil->recovery_count++;
 320         else
 321                 wil->recovery_count = 1; /* fw was alive for a long time */
 322
 323         if (wil->recovery_count > WIL6210_FW_RECOVERY_RETRIES) {
 324                 wil_err(wil, "too many recovery attempts (%d), giving up\n",
 325                         wil->recovery_count);
 326                 return;
 327         }
 328
 329         wil->last_fw_recovery = jiffies;
 330
 331         mutex_lock(&wil->mutex);
 332         switch (wdev->iftype) {
 333         case NL80211_IFTYPE_STATION:
 334         case NL80211_IFTYPE_P2P_CLIENT:
 335         case NL80211_IFTYPE_MONITOR:
 336                 wil_info(wil, "fw error recovery requested (try %d)...\n",
 337                          wil->recovery_count);
 338                 if (!no_fw_recovery)
 339                         wil->recovery_state = fw_recovery_running;
 340                 if (0 != wil_wait_for_recovery(wil))
 341                         break;
 342
 343                 __wil_down(wil);
 344                 __wil_up(wil);
 345                 break;
 346         case NL80211_IFTYPE_AP:
 347         case NL80211_IFTYPE_P2P_GO:
 348                 wil_info(wil, "No recovery for AP-like interface\n");
 349                 /* recovery in these modes is done by upper layers */
 350                 break;
 351         default:
 352                 wil_err(wil, "No recovery - unknown interface type %d\n",
 353                         wdev->iftype);
 354                 break;
 355         }
 356         mutex_unlock(&wil->mutex);
 357 }
 358
 359 static int wil_find_free_vring(struct wil6210_priv *wil)
 360 {
 361         int i;
 362
 363         for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
 364                 if (!wil->vring_tx[i].va)
 365                         return i;
 366         }
 367         return -EINVAL;
 368 }
 369
 370 int wil_bcast_init(struct wil6210_priv *wil)
 371 {
 372         int ri = wil->bcast_vring, rc;
 373
 374         if ((ri >= 0) && wil->vring_tx[ri].va)
 375                 return 0;
 376
 377         ri = wil_find_free_vring(wil);
 378         if (ri < 0)
 379                 return ri;
 380
 381         wil->bcast_vring = ri;
 382         rc = wil_vring_init_bcast(wil, ri, 1 << bcast_ring_order);
 383         if (rc)
 384                 wil->bcast_vring = -1;
 385
 386         return rc;
 387 }
 388
 389 void wil_bcast_fini(struct wil6210_priv *wil)
 390 {
 391         int ri = wil->bcast_vring;
 392
 393         if (ri < 0)
 394                 return;
 395
 396         wil->bcast_vring = -1;
 397         wil_vring_fini_tx(wil, ri);
 398 }
 399
 400 static void wil_connect_worker(struct work_struct *work)
 401 {
 402         int rc;
 403         struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
 404                                                 connect_worker);
 405         struct net_device *ndev = wil_to_ndev(wil);
 406
 407         int cid = wil->pending_connect_cid;
 408         int ringid = wil_find_free_vring(wil);
 409
 410         if (cid < 0) {
 411                 wil_err(wil, "No connection pending\n");
 412                 return;
 413         }
 414
 415         wil_dbg_wmi(wil, "Configure for connection CID %d\n", cid);
 416
 417         rc = wil_vring_init_tx(wil, ringid, 1 << tx_ring_order, cid, 0);
 418         wil->pending_connect_cid = -1;
 419         if (rc == 0) {
 420                 wil->sta[cid].status = wil_sta_connected;
 421                 netif_tx_wake_all_queues(ndev);
 422         } else {
 423                 wil->sta[cid].status = wil_sta_unused;
 424         }
 425 }
 426
 427 int wil_priv_init(struct wil6210_priv *wil)
 428 {
 429         uint i;
 430
 431         wil_dbg_misc(wil, "%s()\n", __func__);
 432
 433         memset(wil->sta, 0, sizeof(wil->sta));
 434         for (i = 0; i < WIL6210_MAX_CID; i++)
 435                 spin_lock_init(&wil->sta[i].tid_rx_lock);
 436
 437         mutex_init(&wil->mutex);
 438         mutex_init(&wil->wmi_mutex);
 439         mutex_init(&wil->back_rx_mutex);
 440         mutex_init(&wil->back_tx_mutex);
 441         mutex_init(&wil->probe_client_mutex);
 442
 443         init_completion(&wil->wmi_ready);
 444         init_completion(&wil->wmi_call);
 445
 446         wil->pending_connect_cid = -1;
 447         wil->bcast_vring = -1;
 448         setup_timer(&wil->connect_timer, wil_connect_timer_fn, (ulong)wil);
 449         setup_timer(&wil->scan_timer, wil_scan_timer_fn, (ulong)wil);
 450
 451         INIT_WORK(&wil->connect_worker, wil_connect_worker);
 452         INIT_WORK(&wil->disconnect_worker, wil_disconnect_worker);
 453         INIT_WORK(&wil->wmi_event_worker, wmi_event_worker);
 454         INIT_WORK(&wil->fw_error_worker, wil_fw_error_worker);
 455         INIT_WORK(&wil->back_rx_worker, wil_back_rx_worker);
 456         INIT_WORK(&wil->back_tx_worker, wil_back_tx_worker);
 457         INIT_WORK(&wil->probe_client_worker, wil_probe_client_worker);
 458
 459         INIT_LIST_HEAD(&wil->pending_wmi_ev);
 460         INIT_LIST_HEAD(&wil->back_rx_pending);
 461         INIT_LIST_HEAD(&wil->back_tx_pending);
 462         INIT_LIST_HEAD(&wil->probe_client_pending);
 463         spin_lock_init(&wil->wmi_ev_lock);
 464         init_waitqueue_head(&wil->wq);
 465
 466         wil->wmi_wq = create_singlethread_workqueue(WIL_NAME "_wmi");
 467         if (!wil->wmi_wq)
 468                 return -EAGAIN;
 469
 470         wil->wq_service = create_singlethread_workqueue(WIL_NAME "_service");
 471         if (!wil->wq_service)
 472                 goto out_wmi_wq;
 473
 474         wil->last_fw_recovery = jiffies;
 475         wil->tx_interframe_timeout = WIL6210_ITR_TX_INTERFRAME_TIMEOUT_DEFAULT;
 476         wil->rx_interframe_timeout = WIL6210_ITR_RX_INTERFRAME_TIMEOUT_DEFAULT;
 477         wil->tx_max_burst_duration = WIL6210_ITR_TX_MAX_BURST_DURATION_DEFAULT;
 478         wil->rx_max_burst_duration = WIL6210_ITR_RX_MAX_BURST_DURATION_DEFAULT;
 479
 480         if (rx_ring_overflow_thrsh == WIL6210_RX_HIGH_TRSH_INIT)
 481                 rx_ring_overflow_thrsh = WIL6210_RX_HIGH_TRSH_DEFAULT;
 482         return 0;
 483
 484 out_wmi_wq:
 485         destroy_workqueue(wil->wmi_wq);
 486
 487         return -EAGAIN;
 488 }
 489
 490 /**
 491  * wil6210_disconnect - disconnect one connection
 492  * @wil: driver context
 493  * @bssid: peer to disconnect, NULL to disconnect all
 494  * @reason_code: Reason code for the Disassociation frame
 495  * @from_event: whether is invoked from FW event handler
 496  *
 497  * Disconnect and release associated resources. If invoked not from the
 498  * FW event handler, issue WMI command(s) to trigger MAC disconnect.
 499  */
 500 void wil6210_disconnect(struct wil6210_priv *wil, const u8 *bssid,
 501                         u16 reason_code, bool from_event)
 502 {
 503         wil_dbg_misc(wil, "%s()\n", __func__);
 504
 505         del_timer_sync(&wil->connect_timer);
 506         _wil6210_disconnect(wil, bssid, reason_code, from_event);
 507 }
 508
 509 void wil_priv_deinit(struct wil6210_priv *wil)
 510 {
 511         wil_dbg_misc(wil, "%s()\n", __func__);
 512
 513         wil_set_recovery_state(wil, fw_recovery_idle);
 514         del_timer_sync(&wil->scan_timer);
 515         cancel_work_sync(&wil->disconnect_worker);
 516         cancel_work_sync(&wil->fw_error_worker);
 517         mutex_lock(&wil->mutex);
 518         wil6210_disconnect(wil, NULL, WLAN_REASON_DEAUTH_LEAVING, false);
 519         mutex_unlock(&wil->mutex);
 520         wmi_event_flush(wil);
 521         wil_back_rx_flush(wil);
 522         cancel_work_sync(&wil->back_rx_worker);
 523         wil_back_tx_flush(wil);
 524         cancel_work_sync(&wil->back_tx_worker);
 525         wil_probe_client_flush(wil);
 526         cancel_work_sync(&wil->probe_client_worker);
 527         destroy_workqueue(wil->wq_service);
 528         destroy_workqueue(wil->wmi_wq);
 529 }
 530
 531 /* target operations */
 532 /* register read */
 533 #define R(a) ioread32(wil->csr + HOSTADDR(a))
 534 /* register write. wmb() to make sure it is completed */
 535 #define W(a, v) do { iowrite32(v, wil->csr + HOSTADDR(a)); wmb(); } while (0)
 536 /* register set = read, OR, write */
 537 #define S(a, v) W(a, R(a) | v)
 538 /* register clear = read, AND with inverted, write */
 539 #define C(a, v) W(a, R(a) & ~v)
 540
 541 static inline void wil_halt_cpu(struct wil6210_priv *wil)
 542 {
 543         W(RGF_USER_USER_CPU_0, BIT_USER_USER_CPU_MAN_RST);
 544         W(RGF_USER_MAC_CPU_0,  BIT_USER_MAC_CPU_MAN_RST);
 545 }
 546
 547 static inline void wil_release_cpu(struct wil6210_priv *wil)
 548 {
 549         /* Start CPU */
 550         W(RGF_USER_USER_CPU_0, 1);
 551 }
 552
 553 static int wil_target_reset(struct wil6210_priv *wil)
 554 {
 555         int delay = 0;
 556         u32 x, x1 = 0;
 557
 558         wil_dbg_misc(wil, "Resetting \"%s\"...\n", wil->hw_name);
 559
 560         /* Clear MAC link up */
 561         S(RGF_HP_CTRL, BIT(15));
 562         S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT_HPAL_PERST_FROM_PAD);
 563         S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT_CAR_PERST_RST);
 564
 565         wil_halt_cpu(wil);
 566
 567         /* clear all boot loader "ready" bits */
 568         W(RGF_USER_BL + offsetof(struct RGF_BL, ready), 0);
 569         /* Clear Fw Download notification */
 570         C(RGF_USER_USAGE_6, BIT(0));
 571
 572         S(RGF_CAF_OSC_CONTROL, BIT_CAF_OSC_XTAL_EN);
 573         /* XTAL stabilization should take about 3ms */
 574         usleep_range(5000, 7000);
 575         x = R(RGF_CAF_PLL_LOCK_STATUS);
 576         if (!(x & BIT_CAF_OSC_DIG_XTAL_STABLE)) {
 577                 wil_err(wil, "Xtal stabilization timeout\n"
 578                         "RGF_CAF_PLL_LOCK_STATUS = 0x%08x\n", x);
 579                 return -ETIME;
 580         }
 581         /* switch 10k to XTAL*/
 582         C(RGF_USER_SPARROW_M_4, BIT_SPARROW_M_4_SEL_SLEEP_OR_REF);
 583         /* 40 MHz */
 584         C(RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_CAR_AHB_SW_SEL);
 585
 586         W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x3ff81f);
 587         W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_1, 0xf);
 588
 589         W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0xFE000000);
 590         W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0x0000003F);
 591         W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x000000f0);
 592         W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0xFFE7FE00);
 593
 594         W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x0);
 595         W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_1, 0x0);
 596
 597         W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0);
 598         W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0);
 599         W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0);
 600         W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
 601
 602         W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000003);
 603         W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00008000); /* reset A2 PCIE AHB */
 604
 605         W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
 606
 607         /* wait until device ready. typical time is 20..80 msec */
 608         do {
 609                 msleep(RST_DELAY);
 610                 x = R(RGF_USER_BL + offsetof(struct RGF_BL, ready));
 611                 if (x1 != x) {
 612                         wil_dbg_misc(wil, "BL.ready 0x%08x => 0x%08x\n", x1, x);
 613                         x1 = x;
 614                 }
 615                 if (delay++ > RST_COUNT) {
 616                         wil_err(wil, "Reset not completed, bl.ready 0x%08x\n",
 617                                 x);
 618                         return -ETIME;
 619                 }
 620         } while (x != BIT_BL_READY);
 621
 622         C(RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_RST_PWGD);
 623
 624         /* enable fix for HW bug related to the SA/DA swap in AP Rx */
 625         S(RGF_DMA_OFUL_NID_0, BIT_DMA_OFUL_NID_0_RX_EXT_TR_EN |
 626           BIT_DMA_OFUL_NID_0_RX_EXT_A3_SRC);
 627
 628         wil_dbg_misc(wil, "Reset completed in %d ms\n", delay * RST_DELAY);
 629         return 0;
 630 }
 631
 632 void wil_mbox_ring_le2cpus(struct wil6210_mbox_ring *r)
 633 {
 634         le32_to_cpus(&r->base);
 635         le16_to_cpus(&r->entry_size);
 636         le16_to_cpus(&r->size);
 637         le32_to_cpus(&r->tail);
 638         le32_to_cpus(&r->head);
 639 }
 640
 641 static int wil_get_bl_info(struct wil6210_priv *wil)
 642 {
 643         struct net_device *ndev = wil_to_ndev(wil);
 644         struct RGF_BL bl;
 645
 646         wil_memcpy_fromio_32(&bl, wil->csr + HOSTADDR(RGF_USER_BL), sizeof(bl));
 647         le32_to_cpus(&bl.ready);
 648         le32_to_cpus(&bl.version);
 649         le32_to_cpus(&bl.rf_type);
 650         le32_to_cpus(&bl.baseband_type);
 651
 652         if (!is_valid_ether_addr(bl.mac_address)) {
 653                 wil_err(wil, "BL: Invalid MAC %pM\n", bl.mac_address);
 654                 return -EINVAL;
 655         }
 656
 657         ether_addr_copy(ndev->perm_addr, bl.mac_address);
 658         if (!is_valid_ether_addr(ndev->dev_addr))
 659                 ether_addr_copy(ndev->dev_addr, bl.mac_address);
 660         wil_info(wil,
 661                  "Boot Loader: ver = %d MAC = %pM RF = 0x%08x bband = 0x%08x\n",
 662                  bl.version, bl.mac_address, bl.rf_type, bl.baseband_type);
 663
 664         return 0;
 665 }
 666
 667 static int wil_wait_for_fw_ready(struct wil6210_priv *wil)
 668 {
 669         ulong to = msecs_to_jiffies(1000);
 670         ulong left = wait_for_completion_timeout(&wil->wmi_ready, to);
 671
 672         if (0 == left) {
 673                 wil_err(wil, "Firmware not ready\n");
 674                 return -ETIME;
 675         } else {
 676                 wil_info(wil, "FW ready after %d ms. HW version 0x%08x\n",
 677                          jiffies_to_msecs(to-left), wil->hw_version);
 678         }
 679         return 0;
 680 }
 681
 682 /*
 683  * We reset all the structures, and we reset the UMAC.
 684  * After calling this routine, you're expected to reload
 685  * the firmware.
 686  */
 687 int wil_reset(struct wil6210_priv *wil, bool load_fw)
 688 {
 689         int rc;
 690
 691         wil_dbg_misc(wil, "%s()\n", __func__);
 692
 693         if (wil->hw_version == HW_VER_UNKNOWN)
 694                 return -ENODEV;
 695
 696         WARN_ON(!mutex_is_locked(&wil->mutex));
 697         WARN_ON(test_bit(wil_status_napi_en, wil->status));
 698
 699         if (debug_fw) {
 700                 static const u8 mac[ETH_ALEN] = {
 701                         0x00, 0xde, 0xad, 0x12, 0x34, 0x56,
 702                 };
 703                 struct net_device *ndev = wil_to_ndev(wil);
 704
 705                 ether_addr_copy(ndev->perm_addr, mac);
 706                 ether_addr_copy(ndev->dev_addr, ndev->perm_addr);
 707                 return 0;
 708         }
 709
 710         cancel_work_sync(&wil->disconnect_worker);
 711         wil6210_disconnect(wil, NULL, WLAN_REASON_DEAUTH_LEAVING, false);
 712         wil_bcast_fini(wil);
 713
 714         /* prevent NAPI from being scheduled */
 715         bitmap_zero(wil->status, wil_status_last);
 716
 717         if (wil->scan_request) {
 718                 wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
 719                              wil->scan_request);
 720                 del_timer_sync(&wil->scan_timer);
 721                 cfg80211_scan_done(wil->scan_request, true);
 722                 wil->scan_request = NULL;
 723         }
 724
 725         wil_mask_irq(wil);
 726
 727         wmi_event_flush(wil);
 728
 729         flush_workqueue(wil->wq_service);
 730         flush_workqueue(wil->wmi_wq);
 731
 732         rc = wil_target_reset(wil);
 733         wil_rx_fini(wil);
 734         if (rc)
 735                 return rc;
 736
 737         rc = wil_get_bl_info(wil);
 738         if (rc)
 739                 return rc;
 740
 741         if (load_fw) {
 742                 wil_info(wil, "Use firmware <%s> + board <%s>\n", WIL_FW_NAME,
 743                          WIL_FW2_NAME);
 744
 745                 wil_halt_cpu(wil);
 746                 /* Loading f/w from the file */
 747                 rc = wil_request_firmware(wil, WIL_FW_NAME);
 748                 if (rc)
 749                         return rc;
 750                 rc = wil_request_firmware(wil, WIL_FW2_NAME);
 751                 if (rc)
 752                         return rc;
 753
 754                 /* Mark FW as loaded from host */
 755                 S(RGF_USER_USAGE_6, 1);
 756
 757                 /* clear any interrupts which on-card-firmware
 758                  * may have set
 759                  */
 760                 wil6210_clear_irq(wil);
 761                 /* CAF_ICR - clear and mask */
 762                 /* it is W1C, clear by writing back same value */
 763                 S(RGF_CAF_ICR + offsetof(struct RGF_ICR, ICR), 0);
 764                 W(RGF_CAF_ICR + offsetof(struct RGF_ICR, IMV), ~0);
 765
 766                 wil_release_cpu(wil);
 767         }
 768
 769         /* init after reset */
 770         wil->pending_connect_cid = -1;
 771         wil->ap_isolate = 0;
 772         reinit_completion(&wil->wmi_ready);
 773         reinit_completion(&wil->wmi_call);
 774
 775         if (load_fw) {
 776                 wil_configure_interrupt_moderation(wil);
 777                 wil_unmask_irq(wil);
 778
 779                 /* we just started MAC, wait for FW ready */
 780                 rc = wil_wait_for_fw_ready(wil);
 781                 if (rc == 0) /* check FW is responsive */
 782                         rc = wmi_echo(wil);
 783         }
 784
 785         return rc;
 786 }
 787
 788 #undef R
 789 #undef W
 790 #undef S
 791 #undef C
 792
 793 void wil_fw_error_recovery(struct wil6210_priv *wil)
 794 {
 795         wil_dbg_misc(wil, "starting fw error recovery\n");
 796         wil->recovery_state = fw_recovery_pending;
 797         schedule_work(&wil->fw_error_worker);
 798 }
 799
 800 int __wil_up(struct wil6210_priv *wil)
 801 {
 802         struct net_device *ndev = wil_to_ndev(wil);
 803         struct wireless_dev *wdev = wil->wdev;
 804         int rc;
 805
 806         WARN_ON(!mutex_is_locked(&wil->mutex));
 807
 808         rc = wil_reset(wil, true);
 809         if (rc)
 810                 return rc;
 811
 812         /* Rx VRING. After MAC and beacon */
 813         rc = wil_rx_init(wil, 1 << rx_ring_order);
 814         if (rc)
 815                 return rc;
 816
 817         switch (wdev->iftype) {
 818         case NL80211_IFTYPE_STATION:
 819                 wil_dbg_misc(wil, "type: STATION\n");
 820                 ndev->type = ARPHRD_ETHER;
 821                 break;
 822         case NL80211_IFTYPE_AP:
 823                 wil_dbg_misc(wil, "type: AP\n");
 824                 ndev->type = ARPHRD_ETHER;
 825                 break;
 826         case NL80211_IFTYPE_P2P_CLIENT:
 827                 wil_dbg_misc(wil, "type: P2P_CLIENT\n");
 828                 ndev->type = ARPHRD_ETHER;
 829                 break;
 830         case NL80211_IFTYPE_P2P_GO:
 831                 wil_dbg_misc(wil, "type: P2P_GO\n");
 832                 ndev->type = ARPHRD_ETHER;
 833                 break;
 834         case NL80211_IFTYPE_MONITOR:
 835                 wil_dbg_misc(wil, "type: Monitor\n");
 836                 ndev->type = ARPHRD_IEEE80211_RADIOTAP;
 837                 /* ARPHRD_IEEE80211 or ARPHRD_IEEE80211_RADIOTAP ? */
 838                 break;
 839         default:
 840                 return -EOPNOTSUPP;
 841         }
 842
 843         /* MAC address - pre-requisite for other commands */
 844         wmi_set_mac_address(wil, ndev->dev_addr);
 845
 846         wil_dbg_misc(wil, "NAPI enable\n");
 847         napi_enable(&wil->napi_rx);
 848         napi_enable(&wil->napi_tx);
 849         set_bit(wil_status_napi_en, wil->status);
 850
 851         if (wil->platform_ops.bus_request)
 852                 wil->platform_ops.bus_request(wil->platform_handle,
 853                                               WIL_MAX_BUS_REQUEST_KBPS);
 854
 855         return 0;
 856 }
 857
 858 int wil_up(struct wil6210_priv *wil)
 859 {
 860         int rc;
 861
 862         wil_dbg_misc(wil, "%s()\n", __func__);
 863
 864         mutex_lock(&wil->mutex);
 865         rc = __wil_up(wil);
 866         mutex_unlock(&wil->mutex);
 867
 868         return rc;
 869 }
 870
 871 int __wil_down(struct wil6210_priv *wil)
 872 {
 873         int iter = WAIT_FOR_DISCONNECT_TIMEOUT_MS /
 874                         WAIT_FOR_DISCONNECT_INTERVAL_MS;
 875
 876         WARN_ON(!mutex_is_locked(&wil->mutex));
 877
 878         if (wil->platform_ops.bus_request)
 879                 wil->platform_ops.bus_request(wil->platform_handle, 0);
 880
 881         wil_disable_irq(wil);
 882         if (test_and_clear_bit(wil_status_napi_en, wil->status)) {
 883                 napi_disable(&wil->napi_rx);
 884                 napi_disable(&wil->napi_tx);
 885                 wil_dbg_misc(wil, "NAPI disable\n");
 886         }
 887         wil_enable_irq(wil);
 888
 889         if (wil->scan_request) {
 890                 wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
 891                              wil->scan_request);
 892                 del_timer_sync(&wil->scan_timer);
 893                 cfg80211_scan_done(wil->scan_request, true);
 894                 wil->scan_request = NULL;
 895         }
 896
 897         if (test_bit(wil_status_fwconnected, wil->status) ||
 898             test_bit(wil_status_fwconnecting, wil->status))
 899                 wmi_send(wil, WMI_DISCONNECT_CMDID, NULL, 0);
 900
 901         /* make sure wil is idle (not connected) */
 902         mutex_unlock(&wil->mutex);
 903         while (iter--) {
 904                 int idle = !test_bit(wil_status_fwconnected, wil->status) &&
 905                            !test_bit(wil_status_fwconnecting, wil->status);
 906                 if (idle)
 907                         break;
 908                 msleep(WAIT_FOR_DISCONNECT_INTERVAL_MS);
 909         }
 910         mutex_lock(&wil->mutex);
 911
 912         if (!iter)
 913                 wil_err(wil, "timeout waiting for idle FW/HW\n");
 914
 915         wil_reset(wil, false);
 916
 917         return 0;
 918 }
 919
 920 int wil_down(struct wil6210_priv *wil)
 921 {
 922         int rc;
 923
 924         wil_dbg_misc(wil, "%s()\n", __func__);
 925
 926         wil_set_recovery_state(wil, fw_recovery_idle);
 927         mutex_lock(&wil->mutex);
 928         rc = __wil_down(wil);
 929         mutex_unlock(&wil->mutex);
 930
 931         return rc;
 932 }
 933
 934 int wil_find_cid(struct wil6210_priv *wil, const u8 *mac)
 935 {
 936         int i;
 937         int rc = -ENOENT;
 938
 939         for (i = 0; i < ARRAY_SIZE(wil->sta); i++) {
 940                 if ((wil->sta[i].status != wil_sta_unused) &&
 941                     ether_addr_equal(wil->sta[i].addr, mac)) {
 942                         rc = i;
 943                         break;
 944                 }
 945         }
 946
 947         return rc;
 948 }