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

   1 /*
   2  * Copyright (c) 2012-2016 Qualcomm Atheros, Inc.
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #include <linux/moduleparam.h>
  18 #include <linux/if_arp.h>
  19 #include <linux/etherdevice.h>
  20
  21 #include "wil6210.h"
  22 #include "txrx.h"
  23 #include "wmi.h"
  24 #include "boot_loader.h"
  25
  26 bool debug_fw; /* = false; */
  27 module_param(debug_fw, bool, S_IRUGO);
  28 MODULE_PARM_DESC(debug_fw, " do not perform card reset. For FW debug");
  29
  30 bool no_fw_recovery;
  31 module_param(no_fw_recovery, bool, S_IRUGO | S_IWUSR);
  32 MODULE_PARM_DESC(no_fw_recovery, " disable automatic FW error recovery");
  33
  34 /* if not set via modparam, will be set to default value of 1/8 of
  35  * rx ring size during init flow
  36  */
  37 unsigned short rx_ring_overflow_thrsh = WIL6210_RX_HIGH_TRSH_INIT;
  38 module_param(rx_ring_overflow_thrsh, ushort, S_IRUGO);
  39 MODULE_PARM_DESC(rx_ring_overflow_thrsh,
  40                  " RX ring overflow threshold in descriptors.");
  41
  42 /* We allow allocation of more than 1 page buffers to support large packets.
  43  * It is suboptimal behavior performance wise in case MTU above page size.
  44  */
  45 unsigned int mtu_max = TXRX_BUF_LEN_DEFAULT - WIL_MAX_MPDU_OVERHEAD;
  46 static int mtu_max_set(const char *val, const struct kernel_param *kp)
  47 {
  48         int ret;
  49
  50         /* sets mtu_max directly. no need to restore it in case of
  51          * illegal value since we assume this will fail insmod
  52          */
  53         ret = param_set_uint(val, kp);
  54         if (ret)
  55                 return ret;
  56
  57         if (mtu_max < 68 || mtu_max > WIL_MAX_ETH_MTU)
  58                 ret = -EINVAL;
  59
  60         return ret;
  61 }
  62
  63 static const struct kernel_param_ops mtu_max_ops = {
  64         .set = mtu_max_set,
  65         .get = param_get_uint,
  66 };
  67
  68 module_param_cb(mtu_max, &mtu_max_ops, &mtu_max, S_IRUGO);
  69 MODULE_PARM_DESC(mtu_max, " Max MTU value.");
  70
  71 static uint rx_ring_order = WIL_RX_RING_SIZE_ORDER_DEFAULT;
  72 static uint tx_ring_order = WIL_TX_RING_SIZE_ORDER_DEFAULT;
  73 static uint bcast_ring_order = WIL_BCAST_RING_SIZE_ORDER_DEFAULT;
  74
  75 static int ring_order_set(const char *val, const struct kernel_param *kp)
  76 {
  77         int ret;
  78         uint x;
  79
  80         ret = kstrtouint(val, 0, &x);
  81         if (ret)
  82                 return ret;
  83
  84         if ((x < WIL_RING_SIZE_ORDER_MIN) || (x > WIL_RING_SIZE_ORDER_MAX))
  85                 return -EINVAL;
  86
  87         *((uint *)kp->arg) = x;
  88
  89         return 0;
  90 }
  91
  92 static const struct kernel_param_ops ring_order_ops = {
  93         .set = ring_order_set,
  94         .get = param_get_uint,
  95 };
  96
  97 module_param_cb(rx_ring_order, &ring_order_ops, &rx_ring_order, S_IRUGO);
  98 MODULE_PARM_DESC(rx_ring_order, " Rx ring order; size = 1 << order");
  99 module_param_cb(tx_ring_order, &ring_order_ops, &tx_ring_order, S_IRUGO);
 100 MODULE_PARM_DESC(tx_ring_order, " Tx ring order; size = 1 << order");
 101 module_param_cb(bcast_ring_order, &ring_order_ops, &bcast_ring_order, S_IRUGO);
 102 MODULE_PARM_DESC(bcast_ring_order, " Bcast ring order; size = 1 << order");
 103
 104 #define RST_DELAY (20) /* msec, for loop in @wil_target_reset */
 105 #define RST_COUNT (1 + 1000/RST_DELAY) /* round up to be above 1 sec total */
 106
 107 /*
 108  * Due to a hardware issue,
 109  * one has to read/write to/from NIC in 32-bit chunks;
 110  * regular memcpy_fromio and siblings will
 111  * not work on 64-bit platform - it uses 64-bit transactions
 112  *
 113  * Force 32-bit transactions to enable NIC on 64-bit platforms
 114  *
 115  * To avoid byte swap on big endian host, __raw_{read|write}l
 116  * should be used - {read|write}l would swap bytes to provide
 117  * little endian on PCI value in host endianness.
 118  */
 119 void wil_memcpy_fromio_32(void *dst, const volatile void __iomem *src,
 120                           size_t count)
 121 {
 122         u32 *d = dst;
 123         const volatile u32 __iomem *s = src;
 124
 125         /* size_t is unsigned, if (count%4 != 0) it will wrap */
 126         for (count += 4; count > 4; count -= 4)
 127                 *d++ = __raw_readl(s++);
 128 }
 129
 130 void wil_memcpy_toio_32(volatile void __iomem *dst, const void *src,
 131                         size_t count)
 132 {
 133         volatile u32 __iomem *d = dst;
 134         const u32 *s = src;
 135
 136         for (count += 4; count > 4; count -= 4)
 137                 __raw_writel(*s++, d++);
 138 }
 139
 140 static void wil_disconnect_cid(struct wil6210_priv *wil, int cid,
 141                                u16 reason_code, bool from_event)
 142 __acquires(&sta->tid_rx_lock) __releases(&sta->tid_rx_lock)
 143 {
 144         uint i;
 145         struct net_device *ndev = wil_to_ndev(wil);
 146         struct wireless_dev *wdev = wil->wdev;
 147         struct wil_sta_info *sta = &wil->sta[cid];
 148
 149         might_sleep();
 150         wil_dbg_misc(wil, "%s(CID %d, status %d)\n", __func__, cid,
 151                      sta->status);
 152
 153         if (sta->status != wil_sta_unused) {
 154                 if (!from_event)
 155                         wmi_disconnect_sta(wil, sta->addr, reason_code, true);
 156
 157                 switch (wdev->iftype) {
 158                 case NL80211_IFTYPE_AP:
 159                 case NL80211_IFTYPE_P2P_GO:
 160                         /* AP-like interface */
 161                         cfg80211_del_sta(ndev, sta->addr, GFP_KERNEL);
 162                         break;
 163                 default:
 164                         break;
 165                 }
 166                 sta->status = wil_sta_unused;
 167         }
 168
 169         for (i = 0; i < WIL_STA_TID_NUM; i++) {
 170                 struct wil_tid_ampdu_rx *r;
 171
 172                 spin_lock_bh(&sta->tid_rx_lock);
 173
 174                 r = sta->tid_rx[i];
 175                 sta->tid_rx[i] = NULL;
 176                 wil_tid_ampdu_rx_free(wil, r);
 177
 178                 spin_unlock_bh(&sta->tid_rx_lock);
 179         }
 180         for (i = 0; i < ARRAY_SIZE(wil->vring_tx); i++) {
 181                 if (wil->vring2cid_tid[i][0] == cid)
 182                         wil_vring_fini_tx(wil, i);
 183         }
 184         memset(&sta->stats, 0, sizeof(sta->stats));
 185 }
 186
 187 static void _wil6210_disconnect(struct wil6210_priv *wil, const u8 *bssid,
 188                                 u16 reason_code, bool from_event)
 189 {
 190         int cid = -ENOENT;
 191         struct net_device *ndev = wil_to_ndev(wil);
 192         struct wireless_dev *wdev = wil->wdev;
 193
 194         might_sleep();
 195         wil_info(wil, "%s(bssid=%pM, reason=%d, ev%s)\n", __func__, bssid,
 196                  reason_code, from_event ? "+" : "-");
 197
 198         /* Cases are:
 199          * - disconnect single STA, still connected
 200          * - disconnect single STA, already disconnected
 201          * - disconnect all
 202          *
 203          * For "disconnect all", there are 3 options:
 204          * - bssid == NULL
 205          * - bssid is broadcast address (ff:ff:ff:ff:ff:ff)
 206          * - bssid is our MAC address
 207          */
 208         if (bssid && !is_broadcast_ether_addr(bssid) &&
 209             !ether_addr_equal_unaligned(ndev->dev_addr, bssid)) {
 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         bool q;
 259
 260         wil_err(wil, "Connect timeout detected, disconnect station\n");
 261
 262         /* reschedule to thread context - disconnect won't
 263          * run from atomic context.
 264          * queue on wmi_wq to prevent race with connect event.
 265          */
 266         q = queue_work(wil->wmi_wq, &wil->disconnect_worker);
 267         wil_dbg_wmi(wil, "queue_work of disconnect_worker -> %d\n", q);
 268 }
 269
 270 static void wil_scan_timer_fn(ulong x)
 271 {
 272         struct wil6210_priv *wil = (void *)x;
 273
 274         clear_bit(wil_status_fwready, wil->status);
 275         wil_err(wil, "Scan timeout detected, start fw error recovery\n");
 276         wil_fw_error_recovery(wil);
 277 }
 278
 279 static int wil_wait_for_recovery(struct wil6210_priv *wil)
 280 {
 281         if (wait_event_interruptible(wil->wq, wil->recovery_state !=
 282                                      fw_recovery_pending)) {
 283                 wil_err(wil, "Interrupt, canceling recovery\n");
 284                 return -ERESTARTSYS;
 285         }
 286         if (wil->recovery_state != fw_recovery_running) {
 287                 wil_info(wil, "Recovery cancelled\n");
 288                 return -EINTR;
 289         }
 290         wil_info(wil, "Proceed with recovery\n");
 291         return 0;
 292 }
 293
 294 void wil_set_recovery_state(struct wil6210_priv *wil, int state)
 295 {
 296         wil_dbg_misc(wil, "%s(%d -> %d)\n", __func__,
 297                      wil->recovery_state, state);
 298
 299         wil->recovery_state = state;
 300         wake_up_interruptible(&wil->wq);
 301 }
 302
 303 static void wil_fw_error_worker(struct work_struct *work)
 304 {
 305         struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
 306                                                 fw_error_worker);
 307         struct wireless_dev *wdev = wil->wdev;
 308
 309         wil_dbg_misc(wil, "fw error worker\n");
 310
 311         if (!netif_running(wil_to_ndev(wil))) {
 312                 wil_info(wil, "No recovery - interface is down\n");
 313                 return;
 314         }
 315
 316         /* increment @recovery_count if less then WIL6210_FW_RECOVERY_TO
 317          * passed since last recovery attempt
 318          */
 319         if (time_is_after_jiffies(wil->last_fw_recovery +
 320                                   WIL6210_FW_RECOVERY_TO))
 321                 wil->recovery_count++;
 322         else
 323                 wil->recovery_count = 1; /* fw was alive for a long time */
 324
 325         if (wil->recovery_count > WIL6210_FW_RECOVERY_RETRIES) {
 326                 wil_err(wil, "too many recovery attempts (%d), giving up\n",
 327                         wil->recovery_count);
 328                 return;
 329         }
 330
 331         wil->last_fw_recovery = jiffies;
 332
 333         mutex_lock(&wil->mutex);
 334         switch (wdev->iftype) {
 335         case NL80211_IFTYPE_STATION:
 336         case NL80211_IFTYPE_P2P_CLIENT:
 337         case NL80211_IFTYPE_MONITOR:
 338                 wil_info(wil, "fw error recovery requested (try %d)...\n",
 339                          wil->recovery_count);
 340                 if (!no_fw_recovery)
 341                         wil->recovery_state = fw_recovery_running;
 342                 if (0 != wil_wait_for_recovery(wil))
 343                         break;
 344
 345                 __wil_down(wil);
 346                 __wil_up(wil);
 347                 break;
 348         case NL80211_IFTYPE_AP:
 349         case NL80211_IFTYPE_P2P_GO:
 350                 wil_info(wil, "No recovery for AP-like interface\n");
 351                 /* recovery in these modes is done by upper layers */
 352                 break;
 353         default:
 354                 wil_err(wil, "No recovery - unknown interface type %d\n",
 355                         wdev->iftype);
 356                 break;
 357         }
 358         mutex_unlock(&wil->mutex);
 359 }
 360
 361 static int wil_find_free_vring(struct wil6210_priv *wil)
 362 {
 363         int i;
 364
 365         for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
 366                 if (!wil->vring_tx[i].va)
 367                         return i;
 368         }
 369         return -EINVAL;
 370 }
 371
 372 int wil_tx_init(struct wil6210_priv *wil, int cid)
 373 {
 374         int rc = -EINVAL, ringid;
 375
 376         if (cid < 0) {
 377                 wil_err(wil, "No connection pending\n");
 378                 goto out;
 379         }
 380         ringid = wil_find_free_vring(wil);
 381         if (ringid < 0) {
 382                 wil_err(wil, "No free vring found\n");
 383                 goto out;
 384         }
 385
 386         wil_dbg_wmi(wil, "Configure for connection CID %d vring %d\n",
 387                     cid, ringid);
 388
 389         rc = wil_vring_init_tx(wil, ringid, 1 << tx_ring_order, cid, 0);
 390         if (rc)
 391                 wil_err(wil, "wil_vring_init_tx for CID %d vring %d failed\n",
 392                         cid, ringid);
 393
 394 out:
 395         return rc;
 396 }
 397
 398 int wil_bcast_init(struct wil6210_priv *wil)
 399 {
 400         int ri = wil->bcast_vring, rc;
 401
 402         if ((ri >= 0) && wil->vring_tx[ri].va)
 403                 return 0;
 404
 405         ri = wil_find_free_vring(wil);
 406         if (ri < 0)
 407                 return ri;
 408
 409         wil->bcast_vring = ri;
 410         rc = wil_vring_init_bcast(wil, ri, 1 << bcast_ring_order);
 411         if (rc)
 412                 wil->bcast_vring = -1;
 413
 414         return rc;
 415 }
 416
 417 void wil_bcast_fini(struct wil6210_priv *wil)
 418 {
 419         int ri = wil->bcast_vring;
 420
 421         if (ri < 0)
 422                 return;
 423
 424         wil->bcast_vring = -1;
 425         wil_vring_fini_tx(wil, ri);
 426 }
 427
 428 int wil_priv_init(struct wil6210_priv *wil)
 429 {
 430         uint i;
 431
 432         wil_dbg_misc(wil, "%s()\n", __func__);
 433
 434         memset(wil->sta, 0, sizeof(wil->sta));
 435         for (i = 0; i < WIL6210_MAX_CID; i++)
 436                 spin_lock_init(&wil->sta[i].tid_rx_lock);
 437
 438         for (i = 0; i < WIL6210_MAX_TX_RINGS; i++)
 439                 spin_lock_init(&wil->vring_tx_data[i].lock);
 440
 441         mutex_init(&wil->mutex);
 442         mutex_init(&wil->wmi_mutex);
 443         mutex_init(&wil->back_rx_mutex);
 444         mutex_init(&wil->back_tx_mutex);
 445         mutex_init(&wil->probe_client_mutex);
 446
 447         init_completion(&wil->wmi_ready);
 448         init_completion(&wil->wmi_call);
 449
 450         wil->bcast_vring = -1;
 451         setup_timer(&wil->connect_timer, wil_connect_timer_fn, (ulong)wil);
 452         setup_timer(&wil->scan_timer, wil_scan_timer_fn, (ulong)wil);
 453
 454         INIT_WORK(&wil->disconnect_worker, wil_disconnect_worker);
 455         INIT_WORK(&wil->wmi_event_worker, wmi_event_worker);
 456         INIT_WORK(&wil->fw_error_worker, wil_fw_error_worker);
 457         INIT_WORK(&wil->back_rx_worker, wil_back_rx_worker);
 458         INIT_WORK(&wil->back_tx_worker, wil_back_tx_worker);
 459         INIT_WORK(&wil->probe_client_worker, wil_probe_client_worker);
 460
 461         INIT_LIST_HEAD(&wil->pending_wmi_ev);
 462         INIT_LIST_HEAD(&wil->back_rx_pending);
 463         INIT_LIST_HEAD(&wil->back_tx_pending);
 464         INIT_LIST_HEAD(&wil->probe_client_pending);
 465         spin_lock_init(&wil->wmi_ev_lock);
 466         init_waitqueue_head(&wil->wq);
 467
 468         wil->wmi_wq = create_singlethread_workqueue(WIL_NAME "_wmi");
 469         if (!wil->wmi_wq)
 470                 return -EAGAIN;
 471
 472         wil->wq_service = create_singlethread_workqueue(WIL_NAME "_service");
 473         if (!wil->wq_service)
 474                 goto out_wmi_wq;
 475
 476         wil->last_fw_recovery = jiffies;
 477         wil->tx_interframe_timeout = WIL6210_ITR_TX_INTERFRAME_TIMEOUT_DEFAULT;
 478         wil->rx_interframe_timeout = WIL6210_ITR_RX_INTERFRAME_TIMEOUT_DEFAULT;
 479         wil->tx_max_burst_duration = WIL6210_ITR_TX_MAX_BURST_DURATION_DEFAULT;
 480         wil->rx_max_burst_duration = WIL6210_ITR_RX_MAX_BURST_DURATION_DEFAULT;
 481
 482         if (rx_ring_overflow_thrsh == WIL6210_RX_HIGH_TRSH_INIT)
 483                 rx_ring_overflow_thrsh = WIL6210_RX_HIGH_TRSH_DEFAULT;
 484         return 0;
 485
 486 out_wmi_wq:
 487         destroy_workqueue(wil->wmi_wq);
 488
 489         return -EAGAIN;
 490 }
 491
 492 /**
 493  * wil6210_disconnect - disconnect one connection
 494  * @wil: driver context
 495  * @bssid: peer to disconnect, NULL to disconnect all
 496  * @reason_code: Reason code for the Disassociation frame
 497  * @from_event: whether is invoked from FW event handler
 498  *
 499  * Disconnect and release associated resources. If invoked not from the
 500  * FW event handler, issue WMI command(s) to trigger MAC disconnect.
 501  */
 502 void wil6210_disconnect(struct wil6210_priv *wil, const u8 *bssid,
 503                         u16 reason_code, bool from_event)
 504 {
 505         wil_dbg_misc(wil, "%s()\n", __func__);
 506
 507         del_timer_sync(&wil->connect_timer);
 508         _wil6210_disconnect(wil, bssid, reason_code, from_event);
 509 }
 510
 511 void wil_priv_deinit(struct wil6210_priv *wil)
 512 {
 513         wil_dbg_misc(wil, "%s()\n", __func__);
 514
 515         wil_set_recovery_state(wil, fw_recovery_idle);
 516         del_timer_sync(&wil->scan_timer);
 517         cancel_work_sync(&wil->disconnect_worker);
 518         cancel_work_sync(&wil->fw_error_worker);
 519         mutex_lock(&wil->mutex);
 520         wil6210_disconnect(wil, NULL, WLAN_REASON_DEAUTH_LEAVING, false);
 521         mutex_unlock(&wil->mutex);
 522         wmi_event_flush(wil);
 523         wil_back_rx_flush(wil);
 524         cancel_work_sync(&wil->back_rx_worker);
 525         wil_back_tx_flush(wil);
 526         cancel_work_sync(&wil->back_tx_worker);
 527         wil_probe_client_flush(wil);
 528         cancel_work_sync(&wil->probe_client_worker);
 529         destroy_workqueue(wil->wq_service);
 530         destroy_workqueue(wil->wmi_wq);
 531 }
 532
 533 static inline void wil_halt_cpu(struct wil6210_priv *wil)
 534 {
 535         wil_w(wil, RGF_USER_USER_CPU_0, BIT_USER_USER_CPU_MAN_RST);
 536         wil_w(wil, RGF_USER_MAC_CPU_0,  BIT_USER_MAC_CPU_MAN_RST);
 537 }
 538
 539 static inline void wil_release_cpu(struct wil6210_priv *wil)
 540 {
 541         /* Start CPU */
 542         wil_w(wil, RGF_USER_USER_CPU_0, 1);
 543 }
 544
 545 static int wil_target_reset(struct wil6210_priv *wil)
 546 {
 547         int delay = 0;
 548         u32 x, x1 = 0;
 549
 550         wil_dbg_misc(wil, "Resetting \"%s\"...\n", wil->hw_name);
 551
 552         /* Clear MAC link up */
 553         wil_s(wil, RGF_HP_CTRL, BIT(15));
 554         wil_s(wil, RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT_HPAL_PERST_FROM_PAD);
 555         wil_s(wil, RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT_CAR_PERST_RST);
 556
 557         wil_halt_cpu(wil);
 558
 559         /* clear all boot loader "ready" bits */
 560         wil_w(wil, RGF_USER_BL +
 561               offsetof(struct bl_dedicated_registers_v0, boot_loader_ready), 0);
 562         /* Clear Fw Download notification */
 563         wil_c(wil, RGF_USER_USAGE_6, BIT(0));
 564
 565         wil_s(wil, RGF_CAF_OSC_CONTROL, BIT_CAF_OSC_XTAL_EN);
 566         /* XTAL stabilization should take about 3ms */
 567         usleep_range(5000, 7000);
 568         x = wil_r(wil, RGF_CAF_PLL_LOCK_STATUS);
 569         if (!(x & BIT_CAF_OSC_DIG_XTAL_STABLE)) {
 570                 wil_err(wil, "Xtal stabilization timeout\n"
 571                         "RGF_CAF_PLL_LOCK_STATUS = 0x%08x\n", x);
 572                 return -ETIME;
 573         }
 574         /* switch 10k to XTAL*/
 575         wil_c(wil, RGF_USER_SPARROW_M_4, BIT_SPARROW_M_4_SEL_SLEEP_OR_REF);
 576         /* 40 MHz */
 577         wil_c(wil, RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_CAR_AHB_SW_SEL);
 578
 579         wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x3ff81f);
 580         wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_1, 0xf);
 581
 582         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0xFE000000);
 583         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0x0000003F);
 584         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x000000f0);
 585         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0xFFE7FE00);
 586
 587         wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x0);
 588         wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_1, 0x0);
 589
 590         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0);
 591         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0);
 592         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0);
 593         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
 594
 595         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000003);
 596         /* reset A2 PCIE AHB */
 597         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00008000);
 598
 599         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
 600
 601         /* wait until device ready. typical time is 20..80 msec */
 602         do {
 603                 msleep(RST_DELAY);
 604                 x = wil_r(wil, RGF_USER_BL +
 605                           offsetof(struct bl_dedicated_registers_v0,
 606                                    boot_loader_ready));
 607                 if (x1 != x) {
 608                         wil_dbg_misc(wil, "BL.ready 0x%08x => 0x%08x\n", x1, x);
 609                         x1 = x;
 610                 }
 611                 if (delay++ > RST_COUNT) {
 612                         wil_err(wil, "Reset not completed, bl.ready 0x%08x\n",
 613                                 x);
 614                         return -ETIME;
 615                 }
 616         } while (x != BL_READY);
 617
 618         wil_c(wil, RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_RST_PWGD);
 619
 620         /* enable fix for HW bug related to the SA/DA swap in AP Rx */
 621         wil_s(wil, RGF_DMA_OFUL_NID_0, BIT_DMA_OFUL_NID_0_RX_EXT_TR_EN |
 622               BIT_DMA_OFUL_NID_0_RX_EXT_A3_SRC);
 623
 624         wil_dbg_misc(wil, "Reset completed in %d ms\n", delay * RST_DELAY);
 625         return 0;
 626 }
 627
 628 void wil_mbox_ring_le2cpus(struct wil6210_mbox_ring *r)
 629 {
 630         le32_to_cpus(&r->base);
 631         le16_to_cpus(&r->entry_size);
 632         le16_to_cpus(&r->size);
 633         le32_to_cpus(&r->tail);
 634         le32_to_cpus(&r->head);
 635 }
 636
 637 static int wil_get_bl_info(struct wil6210_priv *wil)
 638 {
 639         struct net_device *ndev = wil_to_ndev(wil);
 640         union {
 641                 struct bl_dedicated_registers_v0 bl0;
 642                 struct bl_dedicated_registers_v1 bl1;
 643         } bl;
 644         u32 bl_ver;
 645         u8 *mac;
 646         u16 rf_status;
 647
 648         wil_memcpy_fromio_32(&bl, wil->csr + HOSTADDR(RGF_USER_BL),
 649                              sizeof(bl));
 650         bl_ver = le32_to_cpu(bl.bl0.boot_loader_struct_version);
 651         mac = bl.bl0.mac_address;
 652
 653         if (bl_ver == 0) {
 654                 le32_to_cpus(&bl.bl0.rf_type);
 655                 le32_to_cpus(&bl.bl0.baseband_type);
 656                 rf_status = 0; /* actually, unknown */
 657                 wil_info(wil,
 658                          "Boot Loader struct v%d: MAC = %pM RF = 0x%08x bband = 0x%08x\n",
 659                          bl_ver, mac,
 660                          bl.bl0.rf_type, bl.bl0.baseband_type);
 661                 wil_info(wil, "Boot Loader build unknown for struct v0\n");
 662         } else {
 663                 le16_to_cpus(&bl.bl1.rf_type);
 664                 rf_status = le16_to_cpu(bl.bl1.rf_status);
 665                 le32_to_cpus(&bl.bl1.baseband_type);
 666                 le16_to_cpus(&bl.bl1.bl_version_subminor);
 667                 le16_to_cpus(&bl.bl1.bl_version_build);
 668                 wil_info(wil,
 669                          "Boot Loader struct v%d: MAC = %pM RF = 0x%04x (status 0x%04x) bband = 0x%08x\n",
 670                          bl_ver, mac,
 671                          bl.bl1.rf_type, rf_status,
 672                          bl.bl1.baseband_type);
 673                 wil_info(wil, "Boot Loader build %d.%d.%d.%d\n",
 674                          bl.bl1.bl_version_major, bl.bl1.bl_version_minor,
 675                          bl.bl1.bl_version_subminor, bl.bl1.bl_version_build);
 676         }
 677
 678         if (!is_valid_ether_addr(mac)) {
 679                 wil_err(wil, "BL: Invalid MAC %pM\n", mac);
 680                 return -EINVAL;
 681         }
 682
 683         ether_addr_copy(ndev->perm_addr, mac);
 684         if (!is_valid_ether_addr(ndev->dev_addr))
 685                 ether_addr_copy(ndev->dev_addr, mac);
 686
 687         if (rf_status) {/* bad RF cable? */
 688                 wil_err(wil, "RF communication error 0x%04x",
 689                         rf_status);
 690                 return -EAGAIN;
 691         }
 692
 693         return 0;
 694 }
 695
 696 static void wil_bl_crash_info(struct wil6210_priv *wil, bool is_err)
 697 {
 698         u32 bl_assert_code, bl_assert_blink, bl_magic_number;
 699         u32 bl_ver = wil_r(wil, RGF_USER_BL +
 700                            offsetof(struct bl_dedicated_registers_v0,
 701                                     boot_loader_struct_version));
 702
 703         if (bl_ver < 2)
 704                 return;
 705
 706         bl_assert_code = wil_r(wil, RGF_USER_BL +
 707                                offsetof(struct bl_dedicated_registers_v1,
 708                                         bl_assert_code));
 709         bl_assert_blink = wil_r(wil, RGF_USER_BL +
 710                                 offsetof(struct bl_dedicated_registers_v1,
 711                                          bl_assert_blink));
 712         bl_magic_number = wil_r(wil, RGF_USER_BL +
 713                                 offsetof(struct bl_dedicated_registers_v1,
 714                                          bl_magic_number));
 715
 716         if (is_err) {
 717                 wil_err(wil,
 718                         "BL assert code 0x%08x blink 0x%08x magic 0x%08x\n",
 719                         bl_assert_code, bl_assert_blink, bl_magic_number);
 720         } else {
 721                 wil_dbg_misc(wil,
 722                              "BL assert code 0x%08x blink 0x%08x magic 0x%08x\n",
 723                              bl_assert_code, bl_assert_blink, bl_magic_number);
 724         }
 725 }
 726
 727 static int wil_wait_for_fw_ready(struct wil6210_priv *wil)
 728 {
 729         ulong to = msecs_to_jiffies(1000);
 730         ulong left = wait_for_completion_timeout(&wil->wmi_ready, to);
 731
 732         if (0 == left) {
 733                 wil_err(wil, "Firmware not ready\n");
 734                 return -ETIME;
 735         } else {
 736                 wil_info(wil, "FW ready after %d ms. HW version 0x%08x\n",
 737                          jiffies_to_msecs(to-left), wil->hw_version);
 738         }
 739         return 0;
 740 }
 741
 742 /*
 743  * We reset all the structures, and we reset the UMAC.
 744  * After calling this routine, you're expected to reload
 745  * the firmware.
 746  */
 747 int wil_reset(struct wil6210_priv *wil, bool load_fw)
 748 {
 749         int rc;
 750
 751         wil_dbg_misc(wil, "%s()\n", __func__);
 752
 753         WARN_ON(!mutex_is_locked(&wil->mutex));
 754         WARN_ON(test_bit(wil_status_napi_en, wil->status));
 755
 756         if (debug_fw) {
 757                 static const u8 mac[ETH_ALEN] = {
 758                         0x00, 0xde, 0xad, 0x12, 0x34, 0x56,
 759                 };
 760                 struct net_device *ndev = wil_to_ndev(wil);
 761
 762                 ether_addr_copy(ndev->perm_addr, mac);
 763                 ether_addr_copy(ndev->dev_addr, ndev->perm_addr);
 764                 return 0;
 765         }
 766
 767         if (wil->hw_version == HW_VER_UNKNOWN)
 768                 return -ENODEV;
 769
 770         set_bit(wil_status_resetting, wil->status);
 771
 772         cancel_work_sync(&wil->disconnect_worker);
 773         wil6210_disconnect(wil, NULL, WLAN_REASON_DEAUTH_LEAVING, false);
 774         wil_bcast_fini(wil);
 775
 776         /* prevent NAPI from being scheduled and prevent wmi commands */
 777         mutex_lock(&wil->wmi_mutex);
 778         bitmap_zero(wil->status, wil_status_last);
 779         mutex_unlock(&wil->wmi_mutex);
 780
 781         if (wil->scan_request) {
 782                 wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
 783                              wil->scan_request);
 784                 del_timer_sync(&wil->scan_timer);
 785                 cfg80211_scan_done(wil->scan_request, true);
 786                 wil->scan_request = NULL;
 787         }
 788
 789         wil_mask_irq(wil);
 790
 791         wmi_event_flush(wil);
 792
 793         flush_workqueue(wil->wq_service);
 794         flush_workqueue(wil->wmi_wq);
 795
 796         wil_bl_crash_info(wil, false);
 797         rc = wil_target_reset(wil);
 798         wil_rx_fini(wil);
 799         if (rc) {
 800                 wil_bl_crash_info(wil, true);
 801                 return rc;
 802         }
 803
 804         rc = wil_get_bl_info(wil);
 805         if (rc == -EAGAIN && !load_fw) /* ignore RF error if not going up */
 806                 rc = 0;
 807         if (rc)
 808                 return rc;
 809
 810         if (load_fw) {
 811                 wil_info(wil, "Use firmware <%s> + board <%s>\n", WIL_FW_NAME,
 812                          WIL_FW2_NAME);
 813
 814                 wil_halt_cpu(wil);
 815                 /* Loading f/w from the file */
 816                 rc = wil_request_firmware(wil, WIL_FW_NAME);
 817                 if (rc)
 818                         return rc;
 819                 rc = wil_request_firmware(wil, WIL_FW2_NAME);
 820                 if (rc)
 821                         return rc;
 822
 823                 /* Mark FW as loaded from host */
 824                 wil_s(wil, RGF_USER_USAGE_6, 1);
 825
 826                 /* clear any interrupts which on-card-firmware
 827                  * may have set
 828                  */
 829                 wil6210_clear_irq(wil);
 830                 /* CAF_ICR - clear and mask */
 831                 /* it is W1C, clear by writing back same value */
 832                 wil_s(wil, RGF_CAF_ICR + offsetof(struct RGF_ICR, ICR), 0);
 833                 wil_w(wil, RGF_CAF_ICR + offsetof(struct RGF_ICR, IMV), ~0);
 834
 835                 wil_release_cpu(wil);
 836         }
 837
 838         /* init after reset */
 839         wil->ap_isolate = 0;
 840         reinit_completion(&wil->wmi_ready);
 841         reinit_completion(&wil->wmi_call);
 842
 843         if (load_fw) {
 844                 wil_configure_interrupt_moderation(wil);
 845                 wil_unmask_irq(wil);
 846
 847                 /* we just started MAC, wait for FW ready */
 848                 rc = wil_wait_for_fw_ready(wil);
 849                 if (rc == 0) /* check FW is responsive */
 850                         rc = wmi_echo(wil);
 851         }
 852
 853         return rc;
 854 }
 855
 856 void wil_fw_error_recovery(struct wil6210_priv *wil)
 857 {
 858         wil_dbg_misc(wil, "starting fw error recovery\n");
 859
 860         if (test_bit(wil_status_resetting, wil->status)) {
 861                 wil_info(wil, "Reset already in progress\n");
 862                 return;
 863         }
 864
 865         wil->recovery_state = fw_recovery_pending;
 866         schedule_work(&wil->fw_error_worker);
 867 }
 868
 869 int __wil_up(struct wil6210_priv *wil)
 870 {
 871         struct net_device *ndev = wil_to_ndev(wil);
 872         struct wireless_dev *wdev = wil->wdev;
 873         int rc;
 874
 875         WARN_ON(!mutex_is_locked(&wil->mutex));
 876
 877         rc = wil_reset(wil, true);
 878         if (rc)
 879                 return rc;
 880
 881         /* Rx VRING. After MAC and beacon */
 882         rc = wil_rx_init(wil, 1 << rx_ring_order);
 883         if (rc)
 884                 return rc;
 885
 886         switch (wdev->iftype) {
 887         case NL80211_IFTYPE_STATION:
 888                 wil_dbg_misc(wil, "type: STATION\n");
 889                 ndev->type = ARPHRD_ETHER;
 890                 break;
 891         case NL80211_IFTYPE_AP:
 892                 wil_dbg_misc(wil, "type: AP\n");
 893                 ndev->type = ARPHRD_ETHER;
 894                 break;
 895         case NL80211_IFTYPE_P2P_CLIENT:
 896                 wil_dbg_misc(wil, "type: P2P_CLIENT\n");
 897                 ndev->type = ARPHRD_ETHER;
 898                 break;
 899         case NL80211_IFTYPE_P2P_GO:
 900                 wil_dbg_misc(wil, "type: P2P_GO\n");
 901                 ndev->type = ARPHRD_ETHER;
 902                 break;
 903         case NL80211_IFTYPE_MONITOR:
 904                 wil_dbg_misc(wil, "type: Monitor\n");
 905                 ndev->type = ARPHRD_IEEE80211_RADIOTAP;
 906                 /* ARPHRD_IEEE80211 or ARPHRD_IEEE80211_RADIOTAP ? */
 907                 break;
 908         default:
 909                 return -EOPNOTSUPP;
 910         }
 911
 912         /* MAC address - pre-requisite for other commands */
 913         wmi_set_mac_address(wil, ndev->dev_addr);
 914
 915         wil_dbg_misc(wil, "NAPI enable\n");
 916         napi_enable(&wil->napi_rx);
 917         napi_enable(&wil->napi_tx);
 918         set_bit(wil_status_napi_en, wil->status);
 919
 920         if (wil->platform_ops.bus_request)
 921                 wil->platform_ops.bus_request(wil->platform_handle,
 922                                               WIL_MAX_BUS_REQUEST_KBPS);
 923
 924         return 0;
 925 }
 926
 927 int wil_up(struct wil6210_priv *wil)
 928 {
 929         int rc;
 930
 931         wil_dbg_misc(wil, "%s()\n", __func__);
 932
 933         mutex_lock(&wil->mutex);
 934         rc = __wil_up(wil);
 935         mutex_unlock(&wil->mutex);
 936
 937         return rc;
 938 }
 939
 940 int __wil_down(struct wil6210_priv *wil)
 941 {
 942         int rc;
 943
 944         WARN_ON(!mutex_is_locked(&wil->mutex));
 945
 946         if (wil->platform_ops.bus_request)
 947                 wil->platform_ops.bus_request(wil->platform_handle, 0);
 948
 949         wil_disable_irq(wil);
 950         if (test_and_clear_bit(wil_status_napi_en, wil->status)) {
 951                 napi_disable(&wil->napi_rx);
 952                 napi_disable(&wil->napi_tx);
 953                 wil_dbg_misc(wil, "NAPI disable\n");
 954         }
 955         wil_enable_irq(wil);
 956
 957         if (wil->scan_request) {
 958                 wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
 959                              wil->scan_request);
 960                 del_timer_sync(&wil->scan_timer);
 961                 cfg80211_scan_done(wil->scan_request, true);
 962                 wil->scan_request = NULL;
 963         }
 964
 965         if (test_bit(wil_status_fwconnected, wil->status) ||
 966             test_bit(wil_status_fwconnecting, wil->status)) {
 967
 968                 mutex_unlock(&wil->mutex);
 969                 rc = wmi_call(wil, WMI_DISCONNECT_CMDID, NULL, 0,
 970                               WMI_DISCONNECT_EVENTID, NULL, 0,
 971                               WIL6210_DISCONNECT_TO_MS);
 972                 mutex_lock(&wil->mutex);
 973                 if (rc)
 974                         wil_err(wil, "timeout waiting for disconnect\n");
 975         }
 976
 977         wil_reset(wil, false);
 978
 979         return 0;
 980 }
 981
 982 int wil_down(struct wil6210_priv *wil)
 983 {
 984         int rc;
 985
 986         wil_dbg_misc(wil, "%s()\n", __func__);
 987
 988         wil_set_recovery_state(wil, fw_recovery_idle);
 989         mutex_lock(&wil->mutex);
 990         rc = __wil_down(wil);
 991         mutex_unlock(&wil->mutex);
 992
 993         return rc;
 994 }
 995
 996 int wil_find_cid(struct wil6210_priv *wil, const u8 *mac)
 997 {
 998         int i;
 999         int rc = -ENOENT;
1000
1001         for (i = 0; i < ARRAY_SIZE(wil->sta); i++) {
1002                 if ((wil->sta[i].status != wil_sta_unused) &&
1003                     ether_addr_equal(wil->sta[i].addr, mac)) {
1004                         rc = i;
1005                         break;
1006                 }
1007         }
1008
1009         return rc;
1010 }