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 #include "boot_loader.h"
  25
  26 #define WAIT_FOR_DISCONNECT_TIMEOUT_MS 2000
  27 #define WAIT_FOR_DISCONNECT_INTERVAL_MS 10
  28
  29 bool debug_fw; /* = false; */
  30 module_param(debug_fw, bool, S_IRUGO);
  31 MODULE_PARM_DESC(debug_fw, " do not perform card reset. For FW debug");
  32
  33 bool no_fw_recovery;
  34 module_param(no_fw_recovery, bool, S_IRUGO | S_IWUSR);
  35 MODULE_PARM_DESC(no_fw_recovery, " disable automatic FW error recovery");
  36
  37 /* if not set via modparam, will be set to default value of 1/8 of
  38  * rx ring size during init flow
  39  */
  40 unsigned short rx_ring_overflow_thrsh = WIL6210_RX_HIGH_TRSH_INIT;
  41 module_param(rx_ring_overflow_thrsh, ushort, S_IRUGO);
  42 MODULE_PARM_DESC(rx_ring_overflow_thrsh,
  43                  " RX ring overflow threshold in descriptors.");
  44
  45 /* We allow allocation of more than 1 page buffers to support large packets.
  46  * It is suboptimal behavior performance wise in case MTU above page size.
  47  */
  48 unsigned int mtu_max = TXRX_BUF_LEN_DEFAULT - WIL_MAX_MPDU_OVERHEAD;
  49 static int mtu_max_set(const char *val, const struct kernel_param *kp)
  50 {
  51         int ret;
  52
  53         /* sets mtu_max directly. no need to restore it in case of
  54          * illegal value since we assume this will fail insmod
  55          */
  56         ret = param_set_uint(val, kp);
  57         if (ret)
  58                 return ret;
  59
  60         if (mtu_max < 68 || mtu_max > WIL_MAX_ETH_MTU)
  61                 ret = -EINVAL;
  62
  63         return ret;
  64 }
  65
  66 static const struct kernel_param_ops mtu_max_ops = {
  67         .set = mtu_max_set,
  68         .get = param_get_uint,
  69 };
  70
  71 module_param_cb(mtu_max, &mtu_max_ops, &mtu_max, S_IRUGO);
  72 MODULE_PARM_DESC(mtu_max, " Max MTU value.");
  73
  74 static uint rx_ring_order = WIL_RX_RING_SIZE_ORDER_DEFAULT;
  75 static uint tx_ring_order = WIL_TX_RING_SIZE_ORDER_DEFAULT;
  76 static uint bcast_ring_order = WIL_BCAST_RING_SIZE_ORDER_DEFAULT;
  77
  78 static int ring_order_set(const char *val, const struct kernel_param *kp)
  79 {
  80         int ret;
  81         uint x;
  82
  83         ret = kstrtouint(val, 0, &x);
  84         if (ret)
  85                 return ret;
  86
  87         if ((x < WIL_RING_SIZE_ORDER_MIN) || (x > WIL_RING_SIZE_ORDER_MAX))
  88                 return -EINVAL;
  89
  90         *((uint *)kp->arg) = x;
  91
  92         return 0;
  93 }
  94
  95 static const struct kernel_param_ops ring_order_ops = {
  96         .set = ring_order_set,
  97         .get = param_get_uint,
  98 };
  99
 100 module_param_cb(rx_ring_order, &ring_order_ops, &rx_ring_order, S_IRUGO);
 101 MODULE_PARM_DESC(rx_ring_order, " Rx ring order; size = 1 << order");
 102 module_param_cb(tx_ring_order, &ring_order_ops, &tx_ring_order, S_IRUGO);
 103 MODULE_PARM_DESC(tx_ring_order, " Tx ring order; size = 1 << order");
 104 module_param_cb(bcast_ring_order, &ring_order_ops, &bcast_ring_order, S_IRUGO);
 105 MODULE_PARM_DESC(bcast_ring_order, " Bcast ring order; size = 1 << order");
 106
 107 #define RST_DELAY (20) /* msec, for loop in @wil_target_reset */
 108 #define RST_COUNT (1 + 1000/RST_DELAY) /* round up to be above 1 sec total */
 109
 110 /*
 111  * Due to a hardware issue,
 112  * one has to read/write to/from NIC in 32-bit chunks;
 113  * regular memcpy_fromio and siblings will
 114  * not work on 64-bit platform - it uses 64-bit transactions
 115  *
 116  * Force 32-bit transactions to enable NIC on 64-bit platforms
 117  *
 118  * To avoid byte swap on big endian host, __raw_{read|write}l
 119  * should be used - {read|write}l would swap bytes to provide
 120  * little endian on PCI value in host endianness.
 121  */
 122 void wil_memcpy_fromio_32(void *dst, const volatile void __iomem *src,
 123                           size_t count)
 124 {
 125         u32 *d = dst;
 126         const volatile u32 __iomem *s = src;
 127
 128         /* size_t is unsigned, if (count%4 != 0) it will wrap */
 129         for (count += 4; count > 4; count -= 4)
 130                 *d++ = __raw_readl(s++);
 131 }
 132
 133 void wil_memcpy_toio_32(volatile void __iomem *dst, const void *src,
 134                         size_t count)
 135 {
 136         volatile u32 __iomem *d = dst;
 137         const u32 *s = src;
 138
 139         for (count += 4; count > 4; count -= 4)
 140                 __raw_writel(*s++, d++);
 141 }
 142
 143 static void wil_disconnect_cid(struct wil6210_priv *wil, int cid,
 144                                u16 reason_code, bool from_event)
 145 __acquires(&sta->tid_rx_lock) __releases(&sta->tid_rx_lock)
 146 {
 147         uint i;
 148         struct net_device *ndev = wil_to_ndev(wil);
 149         struct wireless_dev *wdev = wil->wdev;
 150         struct wil_sta_info *sta = &wil->sta[cid];
 151
 152         might_sleep();
 153         wil_dbg_misc(wil, "%s(CID %d, status %d)\n", __func__, cid,
 154                      sta->status);
 155
 156         if (sta->status != wil_sta_unused) {
 157                 if (!from_event)
 158                         wmi_disconnect_sta(wil, sta->addr, reason_code);
 159
 160                 switch (wdev->iftype) {
 161                 case NL80211_IFTYPE_AP:
 162                 case NL80211_IFTYPE_P2P_GO:
 163                         /* AP-like interface */
 164                         cfg80211_del_sta(ndev, sta->addr, GFP_KERNEL);
 165                         break;
 166                 default:
 167                         break;
 168                 }
 169                 sta->status = wil_sta_unused;
 170         }
 171
 172         for (i = 0; i < WIL_STA_TID_NUM; i++) {
 173                 struct wil_tid_ampdu_rx *r;
 174
 175                 spin_lock_bh(&sta->tid_rx_lock);
 176
 177                 r = sta->tid_rx[i];
 178                 sta->tid_rx[i] = NULL;
 179                 wil_tid_ampdu_rx_free(wil, r);
 180
 181                 spin_unlock_bh(&sta->tid_rx_lock);
 182         }
 183         for (i = 0; i < ARRAY_SIZE(wil->vring_tx); i++) {
 184                 if (wil->vring2cid_tid[i][0] == cid)
 185                         wil_vring_fini_tx(wil, i);
 186         }
 187         memset(&sta->stats, 0, sizeof(sta->stats));
 188 }
 189
 190 static void _wil6210_disconnect(struct wil6210_priv *wil, const u8 *bssid,
 191                                 u16 reason_code, bool from_event)
 192 {
 193         int cid = -ENOENT;
 194         struct net_device *ndev = wil_to_ndev(wil);
 195         struct wireless_dev *wdev = wil->wdev;
 196
 197         might_sleep();
 198         wil_dbg_misc(wil, "%s(bssid=%pM, reason=%d, ev%s)\n", __func__, bssid,
 199                      reason_code, from_event ? "+" : "-");
 200
 201         /* Cases are:
 202          * - disconnect single STA, still connected
 203          * - disconnect single STA, already disconnected
 204          * - disconnect all
 205          *
 206          * For "disconnect all", there are 2 options:
 207          * - bssid == NULL
 208          * - bssid is our MAC address
 209          */
 210         if (bssid && memcmp(ndev->dev_addr, bssid, ETH_ALEN)) {
 211                 cid = wil_find_cid(wil, bssid);
 212                 wil_dbg_misc(wil, "Disconnect %pM, CID=%d, reason=%d\n",
 213                              bssid, cid, reason_code);
 214                 if (cid >= 0) /* disconnect 1 peer */
 215                         wil_disconnect_cid(wil, cid, reason_code, from_event);
 216         } else { /* all */
 217                 wil_dbg_misc(wil, "Disconnect all\n");
 218                 for (cid = 0; cid < WIL6210_MAX_CID; cid++)
 219                         wil_disconnect_cid(wil, cid, reason_code, from_event);
 220         }
 221
 222         /* link state */
 223         switch (wdev->iftype) {
 224         case NL80211_IFTYPE_STATION:
 225         case NL80211_IFTYPE_P2P_CLIENT:
 226                 wil_bcast_fini(wil);
 227                 netif_tx_stop_all_queues(ndev);
 228                 netif_carrier_off(ndev);
 229
 230                 if (test_bit(wil_status_fwconnected, wil->status)) {
 231                         clear_bit(wil_status_fwconnected, wil->status);
 232                         cfg80211_disconnected(ndev, reason_code,
 233                                               NULL, 0, false, GFP_KERNEL);
 234                 } else if (test_bit(wil_status_fwconnecting, wil->status)) {
 235                         cfg80211_connect_result(ndev, bssid, NULL, 0, NULL, 0,
 236                                                 WLAN_STATUS_UNSPECIFIED_FAILURE,
 237                                                 GFP_KERNEL);
 238                 }
 239                 clear_bit(wil_status_fwconnecting, wil->status);
 240                 break;
 241         default:
 242                 break;
 243         }
 244 }
 245
 246 static void wil_disconnect_worker(struct work_struct *work)
 247 {
 248         struct wil6210_priv *wil = container_of(work,
 249                         struct wil6210_priv, disconnect_worker);
 250
 251         mutex_lock(&wil->mutex);
 252         _wil6210_disconnect(wil, NULL, WLAN_REASON_UNSPECIFIED, false);
 253         mutex_unlock(&wil->mutex);
 254 }
 255
 256 static void wil_connect_timer_fn(ulong x)
 257 {
 258         struct wil6210_priv *wil = (void *)x;
 259
 260         wil_dbg_misc(wil, "Connect timeout\n");
 261
 262         /* reschedule to thread context - disconnect won't
 263          * run from atomic context
 264          */
 265         schedule_work(&wil->disconnect_worker);
 266 }
 267
 268 static void wil_scan_timer_fn(ulong x)
 269 {
 270         struct wil6210_priv *wil = (void *)x;
 271
 272         clear_bit(wil_status_fwready, wil->status);
 273         wil_err(wil, "Scan timeout detected, start fw error recovery\n");
 274         wil_fw_error_recovery(wil);
 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 static inline void wil_halt_cpu(struct wil6210_priv *wil)
 532 {
 533         wil_w(wil, RGF_USER_USER_CPU_0, BIT_USER_USER_CPU_MAN_RST);
 534         wil_w(wil, RGF_USER_MAC_CPU_0,  BIT_USER_MAC_CPU_MAN_RST);
 535 }
 536
 537 static inline void wil_release_cpu(struct wil6210_priv *wil)
 538 {
 539         /* Start CPU */
 540         wil_w(wil, RGF_USER_USER_CPU_0, 1);
 541 }
 542
 543 static int wil_target_reset(struct wil6210_priv *wil)
 544 {
 545         int delay = 0;
 546         u32 x, x1 = 0;
 547
 548         wil_dbg_misc(wil, "Resetting \"%s\"...\n", wil->hw_name);
 549
 550         /* Clear MAC link up */
 551         wil_s(wil, RGF_HP_CTRL, BIT(15));
 552         wil_s(wil, RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT_HPAL_PERST_FROM_PAD);
 553         wil_s(wil, RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT_CAR_PERST_RST);
 554
 555         wil_halt_cpu(wil);
 556
 557         /* clear all boot loader "ready" bits */
 558         wil_w(wil, RGF_USER_BL +
 559               offsetof(struct bl_dedicated_registers_v0, boot_loader_ready), 0);
 560         /* Clear Fw Download notification */
 561         wil_c(wil, RGF_USER_USAGE_6, BIT(0));
 562
 563         wil_s(wil, RGF_CAF_OSC_CONTROL, BIT_CAF_OSC_XTAL_EN);
 564         /* XTAL stabilization should take about 3ms */
 565         usleep_range(5000, 7000);
 566         x = wil_r(wil, RGF_CAF_PLL_LOCK_STATUS);
 567         if (!(x & BIT_CAF_OSC_DIG_XTAL_STABLE)) {
 568                 wil_err(wil, "Xtal stabilization timeout\n"
 569                         "RGF_CAF_PLL_LOCK_STATUS = 0x%08x\n", x);
 570                 return -ETIME;
 571         }
 572         /* switch 10k to XTAL*/
 573         wil_c(wil, RGF_USER_SPARROW_M_4, BIT_SPARROW_M_4_SEL_SLEEP_OR_REF);
 574         /* 40 MHz */
 575         wil_c(wil, RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_CAR_AHB_SW_SEL);
 576
 577         wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x3ff81f);
 578         wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_1, 0xf);
 579
 580         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0xFE000000);
 581         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0x0000003F);
 582         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x000000f0);
 583         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0xFFE7FE00);
 584
 585         wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x0);
 586         wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_1, 0x0);
 587
 588         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0);
 589         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0);
 590         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0);
 591         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
 592
 593         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000003);
 594         /* reset A2 PCIE AHB */
 595         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00008000);
 596
 597         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
 598
 599         /* wait until device ready. typical time is 20..80 msec */
 600         do {
 601                 msleep(RST_DELAY);
 602                 x = wil_r(wil, RGF_USER_BL +
 603                           offsetof(struct bl_dedicated_registers_v0,
 604                                    boot_loader_ready));
 605                 if (x1 != x) {
 606                         wil_dbg_misc(wil, "BL.ready 0x%08x => 0x%08x\n", x1, x);
 607                         x1 = x;
 608                 }
 609                 if (delay++ > RST_COUNT) {
 610                         wil_err(wil, "Reset not completed, bl.ready 0x%08x\n",
 611                                 x);
 612                         return -ETIME;
 613                 }
 614         } while (x != BL_READY);
 615
 616         wil_c(wil, RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_RST_PWGD);
 617
 618         /* enable fix for HW bug related to the SA/DA swap in AP Rx */
 619         wil_s(wil, RGF_DMA_OFUL_NID_0, BIT_DMA_OFUL_NID_0_RX_EXT_TR_EN |
 620               BIT_DMA_OFUL_NID_0_RX_EXT_A3_SRC);
 621
 622         wil_dbg_misc(wil, "Reset completed in %d ms\n", delay * RST_DELAY);
 623         return 0;
 624 }
 625
 626 void wil_mbox_ring_le2cpus(struct wil6210_mbox_ring *r)
 627 {
 628         le32_to_cpus(&r->base);
 629         le16_to_cpus(&r->entry_size);
 630         le16_to_cpus(&r->size);
 631         le32_to_cpus(&r->tail);
 632         le32_to_cpus(&r->head);
 633 }
 634
 635 static int wil_get_bl_info(struct wil6210_priv *wil)
 636 {
 637         struct net_device *ndev = wil_to_ndev(wil);
 638         union {
 639                 struct bl_dedicated_registers_v0 bl0;
 640                 struct bl_dedicated_registers_v1 bl1;
 641         } bl;
 642         u32 bl_ver;
 643         u8 *mac;
 644         u16 rf_status;
 645
 646         wil_memcpy_fromio_32(&bl, wil->csr + HOSTADDR(RGF_USER_BL),
 647                              sizeof(bl));
 648         bl_ver = le32_to_cpu(bl.bl0.boot_loader_struct_version);
 649         mac = bl.bl0.mac_address;
 650
 651         if (bl_ver == 0) {
 652                 le32_to_cpus(&bl.bl0.rf_type);
 653                 le32_to_cpus(&bl.bl0.baseband_type);
 654                 rf_status = 0; /* actually, unknown */
 655                 wil_info(wil,
 656                          "Boot Loader struct v%d: MAC = %pM RF = 0x%08x bband = 0x%08x\n",
 657                          bl_ver, mac,
 658                          bl.bl0.rf_type, bl.bl0.baseband_type);
 659                 wil_info(wil, "Boot Loader build unknown for struct v0\n");
 660         } else {
 661                 le16_to_cpus(&bl.bl1.rf_type);
 662                 rf_status = le16_to_cpu(bl.bl1.rf_status);
 663                 le32_to_cpus(&bl.bl1.baseband_type);
 664                 le16_to_cpus(&bl.bl1.bl_version_subminor);
 665                 le16_to_cpus(&bl.bl1.bl_version_build);
 666                 wil_info(wil,
 667                          "Boot Loader struct v%d: MAC = %pM RF = 0x%04x (status 0x%04x) bband = 0x%08x\n",
 668                          bl_ver, mac,
 669                          bl.bl1.rf_type, rf_status,
 670                          bl.bl1.baseband_type);
 671                 wil_info(wil, "Boot Loader build %d.%d.%d.%d\n",
 672                          bl.bl1.bl_version_major, bl.bl1.bl_version_minor,
 673                          bl.bl1.bl_version_subminor, bl.bl1.bl_version_build);
 674         }
 675
 676         if (!is_valid_ether_addr(mac)) {
 677                 wil_err(wil, "BL: Invalid MAC %pM\n", mac);
 678                 return -EINVAL;
 679         }
 680
 681         ether_addr_copy(ndev->perm_addr, mac);
 682         if (!is_valid_ether_addr(ndev->dev_addr))
 683                 ether_addr_copy(ndev->dev_addr, mac);
 684
 685         if (rf_status) {/* bad RF cable? */
 686                 wil_err(wil, "RF communication error 0x%04x",
 687                         rf_status);
 688                 return -EAGAIN;
 689         }
 690
 691         return 0;
 692 }
 693
 694 static void wil_bl_crash_info(struct wil6210_priv *wil, bool is_err)
 695 {
 696         u32 bl_assert_code, bl_assert_blink, bl_magic_number;
 697         u32 bl_ver = wil_r(wil, RGF_USER_BL +
 698                            offsetof(struct bl_dedicated_registers_v0,
 699                                     boot_loader_struct_version));
 700
 701         if (bl_ver < 2)
 702                 return;
 703
 704         bl_assert_code = wil_r(wil, RGF_USER_BL +
 705                                offsetof(struct bl_dedicated_registers_v1,
 706                                         bl_assert_code));
 707         bl_assert_blink = wil_r(wil, RGF_USER_BL +
 708                                 offsetof(struct bl_dedicated_registers_v1,
 709                                          bl_assert_blink));
 710         bl_magic_number = wil_r(wil, RGF_USER_BL +
 711                                 offsetof(struct bl_dedicated_registers_v1,
 712                                          bl_magic_number));
 713
 714         if (is_err) {
 715                 wil_err(wil,
 716                         "BL assert code 0x%08x blink 0x%08x magic 0x%08x\n",
 717                         bl_assert_code, bl_assert_blink, bl_magic_number);
 718         } else {
 719                 wil_dbg_misc(wil,
 720                              "BL assert code 0x%08x blink 0x%08x magic 0x%08x\n",
 721                              bl_assert_code, bl_assert_blink, bl_magic_number);
 722         }
 723 }
 724
 725 static int wil_wait_for_fw_ready(struct wil6210_priv *wil)
 726 {
 727         ulong to = msecs_to_jiffies(1000);
 728         ulong left = wait_for_completion_timeout(&wil->wmi_ready, to);
 729
 730         if (0 == left) {
 731                 wil_err(wil, "Firmware not ready\n");
 732                 return -ETIME;
 733         } else {
 734                 wil_info(wil, "FW ready after %d ms. HW version 0x%08x\n",
 735                          jiffies_to_msecs(to-left), wil->hw_version);
 736         }
 737         return 0;
 738 }
 739
 740 /*
 741  * We reset all the structures, and we reset the UMAC.
 742  * After calling this routine, you're expected to reload
 743  * the firmware.
 744  */
 745 int wil_reset(struct wil6210_priv *wil, bool load_fw)
 746 {
 747         int rc;
 748
 749         wil_dbg_misc(wil, "%s()\n", __func__);
 750
 751         WARN_ON(!mutex_is_locked(&wil->mutex));
 752         WARN_ON(test_bit(wil_status_napi_en, wil->status));
 753
 754         if (debug_fw) {
 755                 static const u8 mac[ETH_ALEN] = {
 756                         0x00, 0xde, 0xad, 0x12, 0x34, 0x56,
 757                 };
 758                 struct net_device *ndev = wil_to_ndev(wil);
 759
 760                 ether_addr_copy(ndev->perm_addr, mac);
 761                 ether_addr_copy(ndev->dev_addr, ndev->perm_addr);
 762                 return 0;
 763         }
 764
 765         if (wil->hw_version == HW_VER_UNKNOWN)
 766                 return -ENODEV;
 767
 768         cancel_work_sync(&wil->disconnect_worker);
 769         wil6210_disconnect(wil, NULL, WLAN_REASON_DEAUTH_LEAVING, false);
 770         wil_bcast_fini(wil);
 771
 772         /* prevent NAPI from being scheduled */
 773         bitmap_zero(wil->status, wil_status_last);
 774
 775         if (wil->scan_request) {
 776                 wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
 777                              wil->scan_request);
 778                 del_timer_sync(&wil->scan_timer);
 779                 cfg80211_scan_done(wil->scan_request, true);
 780                 wil->scan_request = NULL;
 781         }
 782
 783         wil_mask_irq(wil);
 784
 785         wmi_event_flush(wil);
 786
 787         flush_workqueue(wil->wq_service);
 788         flush_workqueue(wil->wmi_wq);
 789
 790         wil_bl_crash_info(wil, false);
 791         rc = wil_target_reset(wil);
 792         wil_rx_fini(wil);
 793         if (rc) {
 794                 wil_bl_crash_info(wil, true);
 795                 return rc;
 796         }
 797
 798         rc = wil_get_bl_info(wil);
 799         if (rc == -EAGAIN && !load_fw) /* ignore RF error if not going up */
 800                 rc = 0;
 801         if (rc)
 802                 return rc;
 803
 804         if (load_fw) {
 805                 wil_info(wil, "Use firmware <%s> + board <%s>\n", WIL_FW_NAME,
 806                          WIL_FW2_NAME);
 807
 808                 wil_halt_cpu(wil);
 809                 /* Loading f/w from the file */
 810                 rc = wil_request_firmware(wil, WIL_FW_NAME);
 811                 if (rc)
 812                         return rc;
 813                 rc = wil_request_firmware(wil, WIL_FW2_NAME);
 814                 if (rc)
 815                         return rc;
 816
 817                 /* Mark FW as loaded from host */
 818                 wil_s(wil, RGF_USER_USAGE_6, 1);
 819
 820                 /* clear any interrupts which on-card-firmware
 821                  * may have set
 822                  */
 823                 wil6210_clear_irq(wil);
 824                 /* CAF_ICR - clear and mask */
 825                 /* it is W1C, clear by writing back same value */
 826                 wil_s(wil, RGF_CAF_ICR + offsetof(struct RGF_ICR, ICR), 0);
 827                 wil_w(wil, RGF_CAF_ICR + offsetof(struct RGF_ICR, IMV), ~0);
 828
 829                 wil_release_cpu(wil);
 830         }
 831
 832         /* init after reset */
 833         wil->pending_connect_cid = -1;
 834         wil->ap_isolate = 0;
 835         reinit_completion(&wil->wmi_ready);
 836         reinit_completion(&wil->wmi_call);
 837
 838         if (load_fw) {
 839                 wil_configure_interrupt_moderation(wil);
 840                 wil_unmask_irq(wil);
 841
 842                 /* we just started MAC, wait for FW ready */
 843                 rc = wil_wait_for_fw_ready(wil);
 844                 if (rc == 0) /* check FW is responsive */
 845                         rc = wmi_echo(wil);
 846         }
 847
 848         return rc;
 849 }
 850
 851 void wil_fw_error_recovery(struct wil6210_priv *wil)
 852 {
 853         wil_dbg_misc(wil, "starting fw error recovery\n");
 854         wil->recovery_state = fw_recovery_pending;
 855         schedule_work(&wil->fw_error_worker);
 856 }
 857
 858 int __wil_up(struct wil6210_priv *wil)
 859 {
 860         struct net_device *ndev = wil_to_ndev(wil);
 861         struct wireless_dev *wdev = wil->wdev;
 862         int rc;
 863
 864         WARN_ON(!mutex_is_locked(&wil->mutex));
 865
 866         rc = wil_reset(wil, true);
 867         if (rc)
 868                 return rc;
 869
 870         /* Rx VRING. After MAC and beacon */
 871         rc = wil_rx_init(wil, 1 << rx_ring_order);
 872         if (rc)
 873                 return rc;
 874
 875         switch (wdev->iftype) {
 876         case NL80211_IFTYPE_STATION:
 877                 wil_dbg_misc(wil, "type: STATION\n");
 878                 ndev->type = ARPHRD_ETHER;
 879                 break;
 880         case NL80211_IFTYPE_AP:
 881                 wil_dbg_misc(wil, "type: AP\n");
 882                 ndev->type = ARPHRD_ETHER;
 883                 break;
 884         case NL80211_IFTYPE_P2P_CLIENT:
 885                 wil_dbg_misc(wil, "type: P2P_CLIENT\n");
 886                 ndev->type = ARPHRD_ETHER;
 887                 break;
 888         case NL80211_IFTYPE_P2P_GO:
 889                 wil_dbg_misc(wil, "type: P2P_GO\n");
 890                 ndev->type = ARPHRD_ETHER;
 891                 break;
 892         case NL80211_IFTYPE_MONITOR:
 893                 wil_dbg_misc(wil, "type: Monitor\n");
 894                 ndev->type = ARPHRD_IEEE80211_RADIOTAP;
 895                 /* ARPHRD_IEEE80211 or ARPHRD_IEEE80211_RADIOTAP ? */
 896                 break;
 897         default:
 898                 return -EOPNOTSUPP;
 899         }
 900
 901         /* MAC address - pre-requisite for other commands */
 902         wmi_set_mac_address(wil, ndev->dev_addr);
 903
 904         wil_dbg_misc(wil, "NAPI enable\n");
 905         napi_enable(&wil->napi_rx);
 906         napi_enable(&wil->napi_tx);
 907         set_bit(wil_status_napi_en, wil->status);
 908
 909         if (wil->platform_ops.bus_request)
 910                 wil->platform_ops.bus_request(wil->platform_handle,
 911                                               WIL_MAX_BUS_REQUEST_KBPS);
 912
 913         return 0;
 914 }
 915
 916 int wil_up(struct wil6210_priv *wil)
 917 {
 918         int rc;
 919
 920         wil_dbg_misc(wil, "%s()\n", __func__);
 921
 922         mutex_lock(&wil->mutex);
 923         rc = __wil_up(wil);
 924         mutex_unlock(&wil->mutex);
 925
 926         return rc;
 927 }
 928
 929 int __wil_down(struct wil6210_priv *wil)
 930 {
 931         int iter = WAIT_FOR_DISCONNECT_TIMEOUT_MS /
 932                         WAIT_FOR_DISCONNECT_INTERVAL_MS;
 933
 934         WARN_ON(!mutex_is_locked(&wil->mutex));
 935
 936         if (wil->platform_ops.bus_request)
 937                 wil->platform_ops.bus_request(wil->platform_handle, 0);
 938
 939         wil_disable_irq(wil);
 940         if (test_and_clear_bit(wil_status_napi_en, wil->status)) {
 941                 napi_disable(&wil->napi_rx);
 942                 napi_disable(&wil->napi_tx);
 943                 wil_dbg_misc(wil, "NAPI disable\n");
 944         }
 945         wil_enable_irq(wil);
 946
 947         if (wil->scan_request) {
 948                 wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
 949                              wil->scan_request);
 950                 del_timer_sync(&wil->scan_timer);
 951                 cfg80211_scan_done(wil->scan_request, true);
 952                 wil->scan_request = NULL;
 953         }
 954
 955         if (test_bit(wil_status_fwconnected, wil->status) ||
 956             test_bit(wil_status_fwconnecting, wil->status))
 957                 wmi_send(wil, WMI_DISCONNECT_CMDID, NULL, 0);
 958
 959         /* make sure wil is idle (not connected) */
 960         mutex_unlock(&wil->mutex);
 961         while (iter--) {
 962                 int idle = !test_bit(wil_status_fwconnected, wil->status) &&
 963                            !test_bit(wil_status_fwconnecting, wil->status);
 964                 if (idle)
 965                         break;
 966                 msleep(WAIT_FOR_DISCONNECT_INTERVAL_MS);
 967         }
 968         mutex_lock(&wil->mutex);
 969
 970         if (!iter)
 971                 wil_err(wil, "timeout waiting for idle FW/HW\n");
 972
 973         wil_reset(wil, false);
 974
 975         return 0;
 976 }
 977
 978 int wil_down(struct wil6210_priv *wil)
 979 {
 980         int rc;
 981
 982         wil_dbg_misc(wil, "%s()\n", __func__);
 983
 984         wil_set_recovery_state(wil, fw_recovery_idle);
 985         mutex_lock(&wil->mutex);
 986         rc = __wil_down(wil);
 987         mutex_unlock(&wil->mutex);
 988
 989         return rc;
 990 }
 991
 992 int wil_find_cid(struct wil6210_priv *wil, const u8 *mac)
 993 {
 994         int i;
 995         int rc = -ENOENT;
 996
 997         for (i = 0; i < ARRAY_SIZE(wil->sta); i++) {
 998                 if ((wil->sta[i].status != wil_sta_unused) &&
 999                     ether_addr_equal(wil->sta[i].addr, mac)) {
1000                         rc = i;
1001                         break;
1002                 }
1003         }
1004
1005         return rc;
1006 }