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 3 options:
 207          * - bssid == NULL
 208          * - bssid is broadcast address (ff:ff:ff:ff:ff:ff)
 209          * - bssid is our MAC address
 210          */
 211         if (bssid && !is_broadcast_ether_addr(bssid) &&
 212             !ether_addr_equal_unaligned(ndev->dev_addr, bssid)) {
 213                 cid = wil_find_cid(wil, bssid);
 214                 wil_dbg_misc(wil, "Disconnect %pM, CID=%d, reason=%d\n",
 215                              bssid, cid, reason_code);
 216                 if (cid >= 0) /* disconnect 1 peer */
 217                         wil_disconnect_cid(wil, cid, reason_code, from_event);
 218         } else { /* all */
 219                 wil_dbg_misc(wil, "Disconnect all\n");
 220                 for (cid = 0; cid < WIL6210_MAX_CID; cid++)
 221                         wil_disconnect_cid(wil, cid, reason_code, from_event);
 222         }
 223
 224         /* link state */
 225         switch (wdev->iftype) {
 226         case NL80211_IFTYPE_STATION:
 227         case NL80211_IFTYPE_P2P_CLIENT:
 228                 wil_bcast_fini(wil);
 229                 netif_tx_stop_all_queues(ndev);
 230                 netif_carrier_off(ndev);
 231
 232                 if (test_bit(wil_status_fwconnected, wil->status)) {
 233                         clear_bit(wil_status_fwconnected, wil->status);
 234                         cfg80211_disconnected(ndev, reason_code,
 235                                               NULL, 0, false, GFP_KERNEL);
 236                 } else if (test_bit(wil_status_fwconnecting, wil->status)) {
 237                         cfg80211_connect_result(ndev, bssid, NULL, 0, NULL, 0,
 238                                                 WLAN_STATUS_UNSPECIFIED_FAILURE,
 239                                                 GFP_KERNEL);
 240                 }
 241                 clear_bit(wil_status_fwconnecting, wil->status);
 242                 break;
 243         default:
 244                 break;
 245         }
 246 }
 247
 248 static void wil_disconnect_worker(struct work_struct *work)
 249 {
 250         struct wil6210_priv *wil = container_of(work,
 251                         struct wil6210_priv, disconnect_worker);
 252
 253         mutex_lock(&wil->mutex);
 254         _wil6210_disconnect(wil, NULL, WLAN_REASON_UNSPECIFIED, false);
 255         mutex_unlock(&wil->mutex);
 256 }
 257
 258 static void wil_connect_timer_fn(ulong x)
 259 {
 260         struct wil6210_priv *wil = (void *)x;
 261
 262         wil_dbg_misc(wil, "Connect timeout\n");
 263
 264         /* reschedule to thread context - disconnect won't
 265          * run from atomic context
 266          */
 267         schedule_work(&wil->disconnect_worker);
 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_bcast_init(struct wil6210_priv *wil)
 373 {
 374         int ri = wil->bcast_vring, rc;
 375
 376         if ((ri >= 0) && wil->vring_tx[ri].va)
 377                 return 0;
 378
 379         ri = wil_find_free_vring(wil);
 380         if (ri < 0)
 381                 return ri;
 382
 383         wil->bcast_vring = ri;
 384         rc = wil_vring_init_bcast(wil, ri, 1 << bcast_ring_order);
 385         if (rc)
 386                 wil->bcast_vring = -1;
 387
 388         return rc;
 389 }
 390
 391 void wil_bcast_fini(struct wil6210_priv *wil)
 392 {
 393         int ri = wil->bcast_vring;
 394
 395         if (ri < 0)
 396                 return;
 397
 398         wil->bcast_vring = -1;
 399         wil_vring_fini_tx(wil, ri);
 400 }
 401
 402 static void wil_connect_worker(struct work_struct *work)
 403 {
 404         int rc;
 405         struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
 406                                                 connect_worker);
 407         struct net_device *ndev = wil_to_ndev(wil);
 408
 409         int cid = wil->pending_connect_cid;
 410         int ringid = wil_find_free_vring(wil);
 411
 412         if (cid < 0) {
 413                 wil_err(wil, "No connection pending\n");
 414                 return;
 415         }
 416
 417         wil_dbg_wmi(wil, "Configure for connection CID %d\n", cid);
 418
 419         rc = wil_vring_init_tx(wil, ringid, 1 << tx_ring_order, cid, 0);
 420         wil->pending_connect_cid = -1;
 421         if (rc == 0) {
 422                 wil->sta[cid].status = wil_sta_connected;
 423                 netif_tx_wake_all_queues(ndev);
 424         } else {
 425                 wil_disconnect_cid(wil, cid, WLAN_REASON_UNSPECIFIED, true);
 426         }
 427 }
 428
 429 int wil_priv_init(struct wil6210_priv *wil)
 430 {
 431         uint i;
 432
 433         wil_dbg_misc(wil, "%s()\n", __func__);
 434
 435         memset(wil->sta, 0, sizeof(wil->sta));
 436         for (i = 0; i < WIL6210_MAX_CID; i++)
 437                 spin_lock_init(&wil->sta[i].tid_rx_lock);
 438
 439         mutex_init(&wil->mutex);
 440         mutex_init(&wil->wmi_mutex);
 441         mutex_init(&wil->back_rx_mutex);
 442         mutex_init(&wil->back_tx_mutex);
 443         mutex_init(&wil->probe_client_mutex);
 444
 445         init_completion(&wil->wmi_ready);
 446         init_completion(&wil->wmi_call);
 447
 448         wil->pending_connect_cid = -1;
 449         wil->bcast_vring = -1;
 450         setup_timer(&wil->connect_timer, wil_connect_timer_fn, (ulong)wil);
 451         setup_timer(&wil->scan_timer, wil_scan_timer_fn, (ulong)wil);
 452
 453         INIT_WORK(&wil->connect_worker, wil_connect_worker);
 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 */
 777         bitmap_zero(wil->status, wil_status_last);
 778
 779         if (wil->scan_request) {
 780                 wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
 781                              wil->scan_request);
 782                 del_timer_sync(&wil->scan_timer);
 783                 cfg80211_scan_done(wil->scan_request, true);
 784                 wil->scan_request = NULL;
 785         }
 786
 787         wil_mask_irq(wil);
 788
 789         wmi_event_flush(wil);
 790
 791         flush_workqueue(wil->wq_service);
 792         flush_workqueue(wil->wmi_wq);
 793
 794         wil_bl_crash_info(wil, false);
 795         rc = wil_target_reset(wil);
 796         wil_rx_fini(wil);
 797         if (rc) {
 798                 wil_bl_crash_info(wil, true);
 799                 return rc;
 800         }
 801
 802         rc = wil_get_bl_info(wil);
 803         if (rc == -EAGAIN && !load_fw) /* ignore RF error if not going up */
 804                 rc = 0;
 805         if (rc)
 806                 return rc;
 807
 808         if (load_fw) {
 809                 wil_info(wil, "Use firmware <%s> + board <%s>\n", WIL_FW_NAME,
 810                          WIL_FW2_NAME);
 811
 812                 wil_halt_cpu(wil);
 813                 /* Loading f/w from the file */
 814                 rc = wil_request_firmware(wil, WIL_FW_NAME);
 815                 if (rc)
 816                         return rc;
 817                 rc = wil_request_firmware(wil, WIL_FW2_NAME);
 818                 if (rc)
 819                         return rc;
 820
 821                 /* Mark FW as loaded from host */
 822                 wil_s(wil, RGF_USER_USAGE_6, 1);
 823
 824                 /* clear any interrupts which on-card-firmware
 825                  * may have set
 826                  */
 827                 wil6210_clear_irq(wil);
 828                 /* CAF_ICR - clear and mask */
 829                 /* it is W1C, clear by writing back same value */
 830                 wil_s(wil, RGF_CAF_ICR + offsetof(struct RGF_ICR, ICR), 0);
 831                 wil_w(wil, RGF_CAF_ICR + offsetof(struct RGF_ICR, IMV), ~0);
 832
 833                 wil_release_cpu(wil);
 834         }
 835
 836         /* init after reset */
 837         wil->pending_connect_cid = -1;
 838         wil->ap_isolate = 0;
 839         reinit_completion(&wil->wmi_ready);
 840         reinit_completion(&wil->wmi_call);
 841
 842         if (load_fw) {
 843                 wil_configure_interrupt_moderation(wil);
 844                 wil_unmask_irq(wil);
 845
 846                 /* we just started MAC, wait for FW ready */
 847                 rc = wil_wait_for_fw_ready(wil);
 848                 if (rc == 0) /* check FW is responsive */
 849                         rc = wmi_echo(wil);
 850         }
 851
 852         return rc;
 853 }
 854
 855 void wil_fw_error_recovery(struct wil6210_priv *wil)
 856 {
 857         wil_dbg_misc(wil, "starting fw error recovery\n");
 858
 859         if (test_bit(wil_status_resetting, wil->status)) {
 860                 wil_info(wil, "Reset already in progress\n");
 861                 return;
 862         }
 863
 864         wil->recovery_state = fw_recovery_pending;
 865         schedule_work(&wil->fw_error_worker);
 866 }
 867
 868 int __wil_up(struct wil6210_priv *wil)
 869 {
 870         struct net_device *ndev = wil_to_ndev(wil);
 871         struct wireless_dev *wdev = wil->wdev;
 872         int rc;
 873
 874         WARN_ON(!mutex_is_locked(&wil->mutex));
 875
 876         rc = wil_reset(wil, true);
 877         if (rc)
 878                 return rc;
 879
 880         /* Rx VRING. After MAC and beacon */
 881         rc = wil_rx_init(wil, 1 << rx_ring_order);
 882         if (rc)
 883                 return rc;
 884
 885         switch (wdev->iftype) {
 886         case NL80211_IFTYPE_STATION:
 887                 wil_dbg_misc(wil, "type: STATION\n");
 888                 ndev->type = ARPHRD_ETHER;
 889                 break;
 890         case NL80211_IFTYPE_AP:
 891                 wil_dbg_misc(wil, "type: AP\n");
 892                 ndev->type = ARPHRD_ETHER;
 893                 break;
 894         case NL80211_IFTYPE_P2P_CLIENT:
 895                 wil_dbg_misc(wil, "type: P2P_CLIENT\n");
 896                 ndev->type = ARPHRD_ETHER;
 897                 break;
 898         case NL80211_IFTYPE_P2P_GO:
 899                 wil_dbg_misc(wil, "type: P2P_GO\n");
 900                 ndev->type = ARPHRD_ETHER;
 901                 break;
 902         case NL80211_IFTYPE_MONITOR:
 903                 wil_dbg_misc(wil, "type: Monitor\n");
 904                 ndev->type = ARPHRD_IEEE80211_RADIOTAP;
 905                 /* ARPHRD_IEEE80211 or ARPHRD_IEEE80211_RADIOTAP ? */
 906                 break;
 907         default:
 908                 return -EOPNOTSUPP;
 909         }
 910
 911         /* MAC address - pre-requisite for other commands */
 912         wmi_set_mac_address(wil, ndev->dev_addr);
 913
 914         wil_dbg_misc(wil, "NAPI enable\n");
 915         napi_enable(&wil->napi_rx);
 916         napi_enable(&wil->napi_tx);
 917         set_bit(wil_status_napi_en, wil->status);
 918
 919         if (wil->platform_ops.bus_request)
 920                 wil->platform_ops.bus_request(wil->platform_handle,
 921                                               WIL_MAX_BUS_REQUEST_KBPS);
 922
 923         return 0;
 924 }
 925
 926 int wil_up(struct wil6210_priv *wil)
 927 {
 928         int rc;
 929
 930         wil_dbg_misc(wil, "%s()\n", __func__);
 931
 932         mutex_lock(&wil->mutex);
 933         rc = __wil_up(wil);
 934         mutex_unlock(&wil->mutex);
 935
 936         return rc;
 937 }
 938
 939 int __wil_down(struct wil6210_priv *wil)
 940 {
 941         int iter = WAIT_FOR_DISCONNECT_TIMEOUT_MS /
 942                         WAIT_FOR_DISCONNECT_INTERVAL_MS;
 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                 wmi_send(wil, WMI_DISCONNECT_CMDID, NULL, 0);
 968
 969         /* make sure wil is idle (not connected) */
 970         mutex_unlock(&wil->mutex);
 971         while (iter--) {
 972                 int idle = !test_bit(wil_status_fwconnected, wil->status) &&
 973                            !test_bit(wil_status_fwconnecting, wil->status);
 974                 if (idle)
 975                         break;
 976                 msleep(WAIT_FOR_DISCONNECT_INTERVAL_MS);
 977         }
 978         mutex_lock(&wil->mutex);
 979
 980         if (!iter)
 981                 wil_err(wil, "timeout waiting for idle FW/HW\n");
 982
 983         wil_reset(wil, false);
 984
 985         return 0;
 986 }
 987
 988 int wil_down(struct wil6210_priv *wil)
 989 {
 990         int rc;
 991
 992         wil_dbg_misc(wil, "%s()\n", __func__);
 993
 994         wil_set_recovery_state(wil, fw_recovery_idle);
 995         mutex_lock(&wil->mutex);
 996         rc = __wil_down(wil);
 997         mutex_unlock(&wil->mutex);
 998
 999         return rc;
1000 }
1001
1002 int wil_find_cid(struct wil6210_priv *wil, const u8 *mac)
1003 {
1004         int i;
1005         int rc = -ENOENT;
1006
1007         for (i = 0; i < ARRAY_SIZE(wil->sta); i++) {
1008                 if ((wil->sta[i].status != wil_sta_unused) &&
1009                     ether_addr_equal(wil->sta[i].addr, mac)) {
1010                         rc = i;
1011                         break;
1012                 }
1013         }
1014
1015         return rc;
1016 }