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