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         for (; count >= 4; count -= 4)
 129                 *d++ = __raw_readl(s++);
 130
 131         if (unlikely(count)) {
 132                 /* count can be 1..3 */
 133                 u32 tmp = __raw_readl(s);
 134
 135                 memcpy(d, &tmp, count);
 136         }
 137 }
 138
 139 void wil_memcpy_toio_32(volatile void __iomem *dst, const void *src,
 140                         size_t count)
 141 {
 142         volatile u32 __iomem *d = dst;
 143         const u32 *s = src;
 144
 145         for (; count >= 4; count -= 4)
 146                 __raw_writel(*s++, d++);
 147
 148         if (unlikely(count)) {
 149                 /* count can be 1..3 */
 150                 u32 tmp = 0;
 151
 152                 memcpy(&tmp, s, count);
 153                 __raw_writel(tmp, d);
 154         }
 155 }
 156
 157 static void wil_disconnect_cid(struct wil6210_priv *wil, int cid,
 158                                u16 reason_code, bool from_event)
 159 __acquires(&sta->tid_rx_lock) __releases(&sta->tid_rx_lock)
 160 {
 161         uint i;
 162         struct net_device *ndev = wil_to_ndev(wil);
 163         struct wireless_dev *wdev = wil->wdev;
 164         struct wil_sta_info *sta = &wil->sta[cid];
 165
 166         might_sleep();
 167         wil_dbg_misc(wil, "%s(CID %d, status %d)\n", __func__, cid,
 168                      sta->status);
 169
 170         if (sta->status != wil_sta_unused) {
 171                 if (!from_event)
 172                         wmi_disconnect_sta(wil, sta->addr, reason_code);
 173
 174                 switch (wdev->iftype) {
 175                 case NL80211_IFTYPE_AP:
 176                 case NL80211_IFTYPE_P2P_GO:
 177                         /* AP-like interface */
 178                         cfg80211_del_sta(ndev, sta->addr, GFP_KERNEL);
 179                         break;
 180                 default:
 181                         break;
 182                 }
 183                 sta->status = wil_sta_unused;
 184         }
 185
 186         for (i = 0; i < WIL_STA_TID_NUM; i++) {
 187                 struct wil_tid_ampdu_rx *r;
 188
 189                 spin_lock_bh(&sta->tid_rx_lock);
 190
 191                 r = sta->tid_rx[i];
 192                 sta->tid_rx[i] = NULL;
 193                 wil_tid_ampdu_rx_free(wil, r);
 194
 195                 spin_unlock_bh(&sta->tid_rx_lock);
 196         }
 197         for (i = 0; i < ARRAY_SIZE(wil->vring_tx); i++) {
 198                 if (wil->vring2cid_tid[i][0] == cid)
 199                         wil_vring_fini_tx(wil, i);
 200         }
 201         memset(&sta->stats, 0, sizeof(sta->stats));
 202 }
 203
 204 static void _wil6210_disconnect(struct wil6210_priv *wil, const u8 *bssid,
 205                                 u16 reason_code, bool from_event)
 206 {
 207         int cid = -ENOENT;
 208         struct net_device *ndev = wil_to_ndev(wil);
 209         struct wireless_dev *wdev = wil->wdev;
 210
 211         might_sleep();
 212         wil_dbg_misc(wil, "%s(bssid=%pM, reason=%d, ev%s)\n", __func__, bssid,
 213                      reason_code, from_event ? "+" : "-");
 214
 215         /* Cases are:
 216          * - disconnect single STA, still connected
 217          * - disconnect single STA, already disconnected
 218          * - disconnect all
 219          *
 220          * For "disconnect all", there are 3 options:
 221          * - bssid == NULL
 222          * - bssid is broadcast address (ff:ff:ff:ff:ff:ff)
 223          * - bssid is our MAC address
 224          */
 225         if (bssid && !is_broadcast_ether_addr(bssid) &&
 226             !ether_addr_equal_unaligned(ndev->dev_addr, bssid)) {
 227                 cid = wil_find_cid(wil, bssid);
 228                 wil_dbg_misc(wil, "Disconnect %pM, CID=%d, reason=%d\n",
 229                              bssid, cid, reason_code);
 230                 if (cid >= 0) /* disconnect 1 peer */
 231                         wil_disconnect_cid(wil, cid, reason_code, from_event);
 232         } else { /* all */
 233                 wil_dbg_misc(wil, "Disconnect all\n");
 234                 for (cid = 0; cid < WIL6210_MAX_CID; cid++)
 235                         wil_disconnect_cid(wil, cid, reason_code, from_event);
 236         }
 237
 238         /* link state */
 239         switch (wdev->iftype) {
 240         case NL80211_IFTYPE_STATION:
 241         case NL80211_IFTYPE_P2P_CLIENT:
 242                 wil_bcast_fini(wil);
 243                 netif_tx_stop_all_queues(ndev);
 244                 netif_carrier_off(ndev);
 245
 246                 if (test_bit(wil_status_fwconnected, wil->status)) {
 247                         clear_bit(wil_status_fwconnected, wil->status);
 248                         cfg80211_disconnected(ndev, reason_code,
 249                                               NULL, 0, false, GFP_KERNEL);
 250                 } else if (test_bit(wil_status_fwconnecting, wil->status)) {
 251                         cfg80211_connect_result(ndev, bssid, NULL, 0, NULL, 0,
 252                                                 WLAN_STATUS_UNSPECIFIED_FAILURE,
 253                                                 GFP_KERNEL);
 254                 }
 255                 clear_bit(wil_status_fwconnecting, wil->status);
 256                 break;
 257         default:
 258                 break;
 259         }
 260 }
 261
 262 static void wil_disconnect_worker(struct work_struct *work)
 263 {
 264         struct wil6210_priv *wil = container_of(work,
 265                         struct wil6210_priv, disconnect_worker);
 266
 267         mutex_lock(&wil->mutex);
 268         _wil6210_disconnect(wil, NULL, WLAN_REASON_UNSPECIFIED, false);
 269         mutex_unlock(&wil->mutex);
 270 }
 271
 272 static void wil_connect_timer_fn(ulong x)
 273 {
 274         struct wil6210_priv *wil = (void *)x;
 275
 276         wil_dbg_misc(wil, "Connect timeout\n");
 277
 278         /* reschedule to thread context - disconnect won't
 279          * run from atomic context
 280          */
 281         schedule_work(&wil->disconnect_worker);
 282 }
 283
 284 static void wil_scan_timer_fn(ulong x)
 285 {
 286         struct wil6210_priv *wil = (void *)x;
 287
 288         clear_bit(wil_status_fwready, wil->status);
 289         wil_err(wil, "Scan timeout detected, start fw error recovery\n");
 290         wil_fw_error_recovery(wil);
 291 }
 292
 293 static int wil_wait_for_recovery(struct wil6210_priv *wil)
 294 {
 295         if (wait_event_interruptible(wil->wq, wil->recovery_state !=
 296                                      fw_recovery_pending)) {
 297                 wil_err(wil, "Interrupt, canceling recovery\n");
 298                 return -ERESTARTSYS;
 299         }
 300         if (wil->recovery_state != fw_recovery_running) {
 301                 wil_info(wil, "Recovery cancelled\n");
 302                 return -EINTR;
 303         }
 304         wil_info(wil, "Proceed with recovery\n");
 305         return 0;
 306 }
 307
 308 void wil_set_recovery_state(struct wil6210_priv *wil, int state)
 309 {
 310         wil_dbg_misc(wil, "%s(%d -> %d)\n", __func__,
 311                      wil->recovery_state, state);
 312
 313         wil->recovery_state = state;
 314         wake_up_interruptible(&wil->wq);
 315 }
 316
 317 static void wil_fw_error_worker(struct work_struct *work)
 318 {
 319         struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
 320                                                 fw_error_worker);
 321         struct wireless_dev *wdev = wil->wdev;
 322
 323         wil_dbg_misc(wil, "fw error worker\n");
 324
 325         if (!netif_running(wil_to_ndev(wil))) {
 326                 wil_info(wil, "No recovery - interface is down\n");
 327                 return;
 328         }
 329
 330         /* increment @recovery_count if less then WIL6210_FW_RECOVERY_TO
 331          * passed since last recovery attempt
 332          */
 333         if (time_is_after_jiffies(wil->last_fw_recovery +
 334                                   WIL6210_FW_RECOVERY_TO))
 335                 wil->recovery_count++;
 336         else
 337                 wil->recovery_count = 1; /* fw was alive for a long time */
 338
 339         if (wil->recovery_count > WIL6210_FW_RECOVERY_RETRIES) {
 340                 wil_err(wil, "too many recovery attempts (%d), giving up\n",
 341                         wil->recovery_count);
 342                 return;
 343         }
 344
 345         wil->last_fw_recovery = jiffies;
 346
 347         wil_info(wil, "fw error recovery requested (try %d)...\n",
 348                  wil->recovery_count);
 349         if (!no_fw_recovery)
 350                 wil->recovery_state = fw_recovery_running;
 351         if (wil_wait_for_recovery(wil) != 0)
 352                 return;
 353
 354         mutex_lock(&wil->mutex);
 355         switch (wdev->iftype) {
 356         case NL80211_IFTYPE_STATION:
 357         case NL80211_IFTYPE_P2P_CLIENT:
 358         case NL80211_IFTYPE_MONITOR:
 359                 /* silent recovery, upper layers will see disconnect */
 360                 __wil_down(wil);
 361                 __wil_up(wil);
 362                 break;
 363         case NL80211_IFTYPE_AP:
 364         case NL80211_IFTYPE_P2P_GO:
 365                 wil_info(wil, "No recovery for AP-like interface\n");
 366                 /* recovery in these modes is done by upper layers */
 367                 break;
 368         default:
 369                 wil_err(wil, "No recovery - unknown interface type %d\n",
 370                         wdev->iftype);
 371                 break;
 372         }
 373         mutex_unlock(&wil->mutex);
 374 }
 375
 376 static int wil_find_free_vring(struct wil6210_priv *wil)
 377 {
 378         int i;
 379
 380         for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
 381                 if (!wil->vring_tx[i].va)
 382                         return i;
 383         }
 384         return -EINVAL;
 385 }
 386
 387 int wil_bcast_init(struct wil6210_priv *wil)
 388 {
 389         int ri = wil->bcast_vring, rc;
 390
 391         if ((ri >= 0) && wil->vring_tx[ri].va)
 392                 return 0;
 393
 394         ri = wil_find_free_vring(wil);
 395         if (ri < 0)
 396                 return ri;
 397
 398         wil->bcast_vring = ri;
 399         rc = wil_vring_init_bcast(wil, ri, 1 << bcast_ring_order);
 400         if (rc)
 401                 wil->bcast_vring = -1;
 402
 403         return rc;
 404 }
 405
 406 void wil_bcast_fini(struct wil6210_priv *wil)
 407 {
 408         int ri = wil->bcast_vring;
 409
 410         if (ri < 0)
 411                 return;
 412
 413         wil->bcast_vring = -1;
 414         wil_vring_fini_tx(wil, ri);
 415 }
 416
 417 static void wil_connect_worker(struct work_struct *work)
 418 {
 419         int rc;
 420         struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
 421                                                 connect_worker);
 422         struct net_device *ndev = wil_to_ndev(wil);
 423
 424         int cid = wil->pending_connect_cid;
 425         int ringid = wil_find_free_vring(wil);
 426
 427         if (cid < 0) {
 428                 wil_err(wil, "No connection pending\n");
 429                 return;
 430         }
 431
 432         wil_dbg_wmi(wil, "Configure for connection CID %d\n", cid);
 433
 434         rc = wil_vring_init_tx(wil, ringid, 1 << tx_ring_order, cid, 0);
 435         wil->pending_connect_cid = -1;
 436         if (rc == 0) {
 437                 wil->sta[cid].status = wil_sta_connected;
 438                 netif_tx_wake_all_queues(ndev);
 439         } else {
 440                 wil_disconnect_cid(wil, cid, WLAN_REASON_UNSPECIFIED, true);
 441         }
 442 }
 443
 444 int wil_priv_init(struct wil6210_priv *wil)
 445 {
 446         uint i;
 447
 448         wil_dbg_misc(wil, "%s()\n", __func__);
 449
 450         memset(wil->sta, 0, sizeof(wil->sta));
 451         for (i = 0; i < WIL6210_MAX_CID; i++)
 452                 spin_lock_init(&wil->sta[i].tid_rx_lock);
 453
 454         mutex_init(&wil->mutex);
 455         mutex_init(&wil->wmi_mutex);
 456         mutex_init(&wil->back_rx_mutex);
 457         mutex_init(&wil->back_tx_mutex);
 458         mutex_init(&wil->probe_client_mutex);
 459
 460         init_completion(&wil->wmi_ready);
 461         init_completion(&wil->wmi_call);
 462
 463         wil->pending_connect_cid = -1;
 464         wil->bcast_vring = -1;
 465         setup_timer(&wil->connect_timer, wil_connect_timer_fn, (ulong)wil);
 466         setup_timer(&wil->scan_timer, wil_scan_timer_fn, (ulong)wil);
 467
 468         INIT_WORK(&wil->connect_worker, wil_connect_worker);
 469         INIT_WORK(&wil->disconnect_worker, wil_disconnect_worker);
 470         INIT_WORK(&wil->wmi_event_worker, wmi_event_worker);
 471         INIT_WORK(&wil->fw_error_worker, wil_fw_error_worker);
 472         INIT_WORK(&wil->back_rx_worker, wil_back_rx_worker);
 473         INIT_WORK(&wil->back_tx_worker, wil_back_tx_worker);
 474         INIT_WORK(&wil->probe_client_worker, wil_probe_client_worker);
 475
 476         INIT_LIST_HEAD(&wil->pending_wmi_ev);
 477         INIT_LIST_HEAD(&wil->back_rx_pending);
 478         INIT_LIST_HEAD(&wil->back_tx_pending);
 479         INIT_LIST_HEAD(&wil->probe_client_pending);
 480         spin_lock_init(&wil->wmi_ev_lock);
 481         init_waitqueue_head(&wil->wq);
 482
 483         wil->wmi_wq = create_singlethread_workqueue(WIL_NAME "_wmi");
 484         if (!wil->wmi_wq)
 485                 return -EAGAIN;
 486
 487         wil->wq_service = create_singlethread_workqueue(WIL_NAME "_service");
 488         if (!wil->wq_service)
 489                 goto out_wmi_wq;
 490
 491         wil->last_fw_recovery = jiffies;
 492         wil->tx_interframe_timeout = WIL6210_ITR_TX_INTERFRAME_TIMEOUT_DEFAULT;
 493         wil->rx_interframe_timeout = WIL6210_ITR_RX_INTERFRAME_TIMEOUT_DEFAULT;
 494         wil->tx_max_burst_duration = WIL6210_ITR_TX_MAX_BURST_DURATION_DEFAULT;
 495         wil->rx_max_burst_duration = WIL6210_ITR_RX_MAX_BURST_DURATION_DEFAULT;
 496
 497         if (rx_ring_overflow_thrsh == WIL6210_RX_HIGH_TRSH_INIT)
 498                 rx_ring_overflow_thrsh = WIL6210_RX_HIGH_TRSH_DEFAULT;
 499         return 0;
 500
 501 out_wmi_wq:
 502         destroy_workqueue(wil->wmi_wq);
 503
 504         return -EAGAIN;
 505 }
 506
 507 /**
 508  * wil6210_disconnect - disconnect one connection
 509  * @wil: driver context
 510  * @bssid: peer to disconnect, NULL to disconnect all
 511  * @reason_code: Reason code for the Disassociation frame
 512  * @from_event: whether is invoked from FW event handler
 513  *
 514  * Disconnect and release associated resources. If invoked not from the
 515  * FW event handler, issue WMI command(s) to trigger MAC disconnect.
 516  */
 517 void wil6210_disconnect(struct wil6210_priv *wil, const u8 *bssid,
 518                         u16 reason_code, bool from_event)
 519 {
 520         wil_dbg_misc(wil, "%s()\n", __func__);
 521
 522         del_timer_sync(&wil->connect_timer);
 523         _wil6210_disconnect(wil, bssid, reason_code, from_event);
 524 }
 525
 526 void wil_priv_deinit(struct wil6210_priv *wil)
 527 {
 528         wil_dbg_misc(wil, "%s()\n", __func__);
 529
 530         wil_set_recovery_state(wil, fw_recovery_idle);
 531         del_timer_sync(&wil->scan_timer);
 532         cancel_work_sync(&wil->disconnect_worker);
 533         cancel_work_sync(&wil->fw_error_worker);
 534         mutex_lock(&wil->mutex);
 535         wil6210_disconnect(wil, NULL, WLAN_REASON_DEAUTH_LEAVING, false);
 536         mutex_unlock(&wil->mutex);
 537         wmi_event_flush(wil);
 538         wil_back_rx_flush(wil);
 539         cancel_work_sync(&wil->back_rx_worker);
 540         wil_back_tx_flush(wil);
 541         cancel_work_sync(&wil->back_tx_worker);
 542         wil_probe_client_flush(wil);
 543         cancel_work_sync(&wil->probe_client_worker);
 544         destroy_workqueue(wil->wq_service);
 545         destroy_workqueue(wil->wmi_wq);
 546 }
 547
 548 static inline void wil_halt_cpu(struct wil6210_priv *wil)
 549 {
 550         wil_w(wil, RGF_USER_USER_CPU_0, BIT_USER_USER_CPU_MAN_RST);
 551         wil_w(wil, RGF_USER_MAC_CPU_0,  BIT_USER_MAC_CPU_MAN_RST);
 552 }
 553
 554 static inline void wil_release_cpu(struct wil6210_priv *wil)
 555 {
 556         /* Start CPU */
 557         wil_w(wil, RGF_USER_USER_CPU_0, 1);
 558 }
 559
 560 static int wil_target_reset(struct wil6210_priv *wil)
 561 {
 562         int delay = 0;
 563         u32 x, x1 = 0;
 564
 565         wil_dbg_misc(wil, "Resetting \"%s\"...\n", wil->hw_name);
 566
 567         /* Clear MAC link up */
 568         wil_s(wil, RGF_HP_CTRL, BIT(15));
 569         wil_s(wil, RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT_HPAL_PERST_FROM_PAD);
 570         wil_s(wil, RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT_CAR_PERST_RST);
 571
 572         wil_halt_cpu(wil);
 573
 574         /* clear all boot loader "ready" bits */
 575         wil_w(wil, RGF_USER_BL +
 576               offsetof(struct bl_dedicated_registers_v0, boot_loader_ready), 0);
 577         /* Clear Fw Download notification */
 578         wil_c(wil, RGF_USER_USAGE_6, BIT(0));
 579
 580         wil_s(wil, RGF_CAF_OSC_CONTROL, BIT_CAF_OSC_XTAL_EN);
 581         /* XTAL stabilization should take about 3ms */
 582         usleep_range(5000, 7000);
 583         x = wil_r(wil, RGF_CAF_PLL_LOCK_STATUS);
 584         if (!(x & BIT_CAF_OSC_DIG_XTAL_STABLE)) {
 585                 wil_err(wil, "Xtal stabilization timeout\n"
 586                         "RGF_CAF_PLL_LOCK_STATUS = 0x%08x\n", x);
 587                 return -ETIME;
 588         }
 589         /* switch 10k to XTAL*/
 590         wil_c(wil, RGF_USER_SPARROW_M_4, BIT_SPARROW_M_4_SEL_SLEEP_OR_REF);
 591         /* 40 MHz */
 592         wil_c(wil, RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_CAR_AHB_SW_SEL);
 593
 594         wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x3ff81f);
 595         wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_1, 0xf);
 596
 597         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0xFE000000);
 598         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0x0000003F);
 599         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x000000f0);
 600         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0xFFE7FE00);
 601
 602         wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x0);
 603         wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_1, 0x0);
 604
 605         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0);
 606         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0);
 607         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0);
 608         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
 609
 610         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000003);
 611         /* reset A2 PCIE AHB */
 612         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00008000);
 613
 614         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
 615
 616         /* wait until device ready. typical time is 20..80 msec */
 617         do {
 618                 msleep(RST_DELAY);
 619                 x = wil_r(wil, RGF_USER_BL +
 620                           offsetof(struct bl_dedicated_registers_v0,
 621                                    boot_loader_ready));
 622                 if (x1 != x) {
 623                         wil_dbg_misc(wil, "BL.ready 0x%08x => 0x%08x\n", x1, x);
 624                         x1 = x;
 625                 }
 626                 if (delay++ > RST_COUNT) {
 627                         wil_err(wil, "Reset not completed, bl.ready 0x%08x\n",
 628                                 x);
 629                         return -ETIME;
 630                 }
 631         } while (x != BL_READY);
 632
 633         wil_c(wil, RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_RST_PWGD);
 634
 635         /* enable fix for HW bug related to the SA/DA swap in AP Rx */
 636         wil_s(wil, RGF_DMA_OFUL_NID_0, BIT_DMA_OFUL_NID_0_RX_EXT_TR_EN |
 637               BIT_DMA_OFUL_NID_0_RX_EXT_A3_SRC);
 638
 639         wil_dbg_misc(wil, "Reset completed in %d ms\n", delay * RST_DELAY);
 640         return 0;
 641 }
 642
 643 void wil_mbox_ring_le2cpus(struct wil6210_mbox_ring *r)
 644 {
 645         le32_to_cpus(&r->base);
 646         le16_to_cpus(&r->entry_size);
 647         le16_to_cpus(&r->size);
 648         le32_to_cpus(&r->tail);
 649         le32_to_cpus(&r->head);
 650 }
 651
 652 static int wil_get_bl_info(struct wil6210_priv *wil)
 653 {
 654         struct net_device *ndev = wil_to_ndev(wil);
 655         union {
 656                 struct bl_dedicated_registers_v0 bl0;
 657                 struct bl_dedicated_registers_v1 bl1;
 658         } bl;
 659         u32 bl_ver;
 660         u8 *mac;
 661         u16 rf_status;
 662
 663         wil_memcpy_fromio_32(&bl, wil->csr + HOSTADDR(RGF_USER_BL),
 664                              sizeof(bl));
 665         bl_ver = le32_to_cpu(bl.bl0.boot_loader_struct_version);
 666         mac = bl.bl0.mac_address;
 667
 668         if (bl_ver == 0) {
 669                 le32_to_cpus(&bl.bl0.rf_type);
 670                 le32_to_cpus(&bl.bl0.baseband_type);
 671                 rf_status = 0; /* actually, unknown */
 672                 wil_info(wil,
 673                          "Boot Loader struct v%d: MAC = %pM RF = 0x%08x bband = 0x%08x\n",
 674                          bl_ver, mac,
 675                          bl.bl0.rf_type, bl.bl0.baseband_type);
 676                 wil_info(wil, "Boot Loader build unknown for struct v0\n");
 677         } else {
 678                 le16_to_cpus(&bl.bl1.rf_type);
 679                 rf_status = le16_to_cpu(bl.bl1.rf_status);
 680                 le32_to_cpus(&bl.bl1.baseband_type);
 681                 le16_to_cpus(&bl.bl1.bl_version_subminor);
 682                 le16_to_cpus(&bl.bl1.bl_version_build);
 683                 wil_info(wil,
 684                          "Boot Loader struct v%d: MAC = %pM RF = 0x%04x (status 0x%04x) bband = 0x%08x\n",
 685                          bl_ver, mac,
 686                          bl.bl1.rf_type, rf_status,
 687                          bl.bl1.baseband_type);
 688                 wil_info(wil, "Boot Loader build %d.%d.%d.%d\n",
 689                          bl.bl1.bl_version_major, bl.bl1.bl_version_minor,
 690                          bl.bl1.bl_version_subminor, bl.bl1.bl_version_build);
 691         }
 692
 693         if (!is_valid_ether_addr(mac)) {
 694                 wil_err(wil, "BL: Invalid MAC %pM\n", mac);
 695                 return -EINVAL;
 696         }
 697
 698         ether_addr_copy(ndev->perm_addr, mac);
 699         if (!is_valid_ether_addr(ndev->dev_addr))
 700                 ether_addr_copy(ndev->dev_addr, mac);
 701
 702         if (rf_status) {/* bad RF cable? */
 703                 wil_err(wil, "RF communication error 0x%04x",
 704                         rf_status);
 705                 return -EAGAIN;
 706         }
 707
 708         return 0;
 709 }
 710
 711 static void wil_bl_crash_info(struct wil6210_priv *wil, bool is_err)
 712 {
 713         u32 bl_assert_code, bl_assert_blink, bl_magic_number;
 714         u32 bl_ver = wil_r(wil, RGF_USER_BL +
 715                            offsetof(struct bl_dedicated_registers_v0,
 716                                     boot_loader_struct_version));
 717
 718         if (bl_ver < 2)
 719                 return;
 720
 721         bl_assert_code = wil_r(wil, RGF_USER_BL +
 722                                offsetof(struct bl_dedicated_registers_v1,
 723                                         bl_assert_code));
 724         bl_assert_blink = wil_r(wil, RGF_USER_BL +
 725                                 offsetof(struct bl_dedicated_registers_v1,
 726                                          bl_assert_blink));
 727         bl_magic_number = wil_r(wil, RGF_USER_BL +
 728                                 offsetof(struct bl_dedicated_registers_v1,
 729                                          bl_magic_number));
 730
 731         if (is_err) {
 732                 wil_err(wil,
 733                         "BL assert code 0x%08x blink 0x%08x magic 0x%08x\n",
 734                         bl_assert_code, bl_assert_blink, bl_magic_number);
 735         } else {
 736                 wil_dbg_misc(wil,
 737                              "BL assert code 0x%08x blink 0x%08x magic 0x%08x\n",
 738                              bl_assert_code, bl_assert_blink, bl_magic_number);
 739         }
 740 }
 741
 742 static int wil_wait_for_fw_ready(struct wil6210_priv *wil)
 743 {
 744         ulong to = msecs_to_jiffies(2000);
 745         ulong left = wait_for_completion_timeout(&wil->wmi_ready, to);
 746
 747         if (0 == left) {
 748                 wil_err(wil, "Firmware not ready\n");
 749                 return -ETIME;
 750         } else {
 751                 wil_info(wil, "FW ready after %d ms. HW version 0x%08x\n",
 752                          jiffies_to_msecs(to-left), wil->hw_version);
 753         }
 754         return 0;
 755 }
 756
 757 /*
 758  * We reset all the structures, and we reset the UMAC.
 759  * After calling this routine, you're expected to reload
 760  * the firmware.
 761  */
 762 int wil_reset(struct wil6210_priv *wil, bool load_fw)
 763 {
 764         int rc;
 765
 766         wil_dbg_misc(wil, "%s()\n", __func__);
 767
 768         WARN_ON(!mutex_is_locked(&wil->mutex));
 769         WARN_ON(test_bit(wil_status_napi_en, wil->status));
 770
 771         if (debug_fw) {
 772                 static const u8 mac[ETH_ALEN] = {
 773                         0x00, 0xde, 0xad, 0x12, 0x34, 0x56,
 774                 };
 775                 struct net_device *ndev = wil_to_ndev(wil);
 776
 777                 ether_addr_copy(ndev->perm_addr, mac);
 778                 ether_addr_copy(ndev->dev_addr, ndev->perm_addr);
 779                 return 0;
 780         }
 781
 782         if (wil->hw_version == HW_VER_UNKNOWN)
 783                 return -ENODEV;
 784
 785         set_bit(wil_status_resetting, wil->status);
 786
 787         cancel_work_sync(&wil->disconnect_worker);
 788         wil6210_disconnect(wil, NULL, WLAN_REASON_DEAUTH_LEAVING, false);
 789         wil_bcast_fini(wil);
 790
 791         /* prevent NAPI from being scheduled */
 792         bitmap_zero(wil->status, wil_status_last);
 793
 794         if (wil->scan_request) {
 795                 wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
 796                              wil->scan_request);
 797                 del_timer_sync(&wil->scan_timer);
 798                 cfg80211_scan_done(wil->scan_request, true);
 799                 wil->scan_request = NULL;
 800         }
 801
 802         wil_mask_irq(wil);
 803
 804         wmi_event_flush(wil);
 805
 806         flush_workqueue(wil->wq_service);
 807         flush_workqueue(wil->wmi_wq);
 808
 809         wil_bl_crash_info(wil, false);
 810         rc = wil_target_reset(wil);
 811         wil_rx_fini(wil);
 812         if (rc) {
 813                 wil_bl_crash_info(wil, true);
 814                 return rc;
 815         }
 816
 817         rc = wil_get_bl_info(wil);
 818         if (rc == -EAGAIN && !load_fw) /* ignore RF error if not going up */
 819                 rc = 0;
 820         if (rc)
 821                 return rc;
 822
 823         if (load_fw) {
 824                 wil_info(wil, "Use firmware <%s> + board <%s>\n", WIL_FW_NAME,
 825                          WIL_FW2_NAME);
 826
 827                 wil_halt_cpu(wil);
 828                 /* Loading f/w from the file */
 829                 rc = wil_request_firmware(wil, WIL_FW_NAME);
 830                 if (rc)
 831                         return rc;
 832                 rc = wil_request_firmware(wil, WIL_FW2_NAME);
 833                 if (rc)
 834                         return rc;
 835
 836                 /* Mark FW as loaded from host */
 837                 wil_s(wil, RGF_USER_USAGE_6, 1);
 838
 839                 /* clear any interrupts which on-card-firmware
 840                  * may have set
 841                  */
 842                 wil6210_clear_irq(wil);
 843                 /* CAF_ICR - clear and mask */
 844                 /* it is W1C, clear by writing back same value */
 845                 wil_s(wil, RGF_CAF_ICR + offsetof(struct RGF_ICR, ICR), 0);
 846                 wil_w(wil, RGF_CAF_ICR + offsetof(struct RGF_ICR, IMV), ~0);
 847
 848                 wil_release_cpu(wil);
 849         }
 850
 851         /* init after reset */
 852         wil->pending_connect_cid = -1;
 853         wil->ap_isolate = 0;
 854         reinit_completion(&wil->wmi_ready);
 855         reinit_completion(&wil->wmi_call);
 856
 857         if (load_fw) {
 858                 wil_configure_interrupt_moderation(wil);
 859                 wil_unmask_irq(wil);
 860
 861                 /* we just started MAC, wait for FW ready */
 862                 rc = wil_wait_for_fw_ready(wil);
 863                 if (rc == 0) /* check FW is responsive */
 864                         rc = wmi_echo(wil);
 865         }
 866
 867         return rc;
 868 }
 869
 870 void wil_fw_error_recovery(struct wil6210_priv *wil)
 871 {
 872         wil_dbg_misc(wil, "starting fw error recovery\n");
 873
 874         if (test_bit(wil_status_resetting, wil->status)) {
 875                 wil_info(wil, "Reset already in progress\n");
 876                 return;
 877         }
 878
 879         wil->recovery_state = fw_recovery_pending;
 880         schedule_work(&wil->fw_error_worker);
 881 }
 882
 883 int __wil_up(struct wil6210_priv *wil)
 884 {
 885         struct net_device *ndev = wil_to_ndev(wil);
 886         struct wireless_dev *wdev = wil->wdev;
 887         int rc;
 888
 889         WARN_ON(!mutex_is_locked(&wil->mutex));
 890
 891         rc = wil_reset(wil, true);
 892         if (rc)
 893                 return rc;
 894
 895         /* Rx VRING. After MAC and beacon */
 896         rc = wil_rx_init(wil, 1 << rx_ring_order);
 897         if (rc)
 898                 return rc;
 899
 900         switch (wdev->iftype) {
 901         case NL80211_IFTYPE_STATION:
 902                 wil_dbg_misc(wil, "type: STATION\n");
 903                 ndev->type = ARPHRD_ETHER;
 904                 break;
 905         case NL80211_IFTYPE_AP:
 906                 wil_dbg_misc(wil, "type: AP\n");
 907                 ndev->type = ARPHRD_ETHER;
 908                 break;
 909         case NL80211_IFTYPE_P2P_CLIENT:
 910                 wil_dbg_misc(wil, "type: P2P_CLIENT\n");
 911                 ndev->type = ARPHRD_ETHER;
 912                 break;
 913         case NL80211_IFTYPE_P2P_GO:
 914                 wil_dbg_misc(wil, "type: P2P_GO\n");
 915                 ndev->type = ARPHRD_ETHER;
 916                 break;
 917         case NL80211_IFTYPE_MONITOR:
 918                 wil_dbg_misc(wil, "type: Monitor\n");
 919                 ndev->type = ARPHRD_IEEE80211_RADIOTAP;
 920                 /* ARPHRD_IEEE80211 or ARPHRD_IEEE80211_RADIOTAP ? */
 921                 break;
 922         default:
 923                 return -EOPNOTSUPP;
 924         }
 925
 926         /* MAC address - pre-requisite for other commands */
 927         wmi_set_mac_address(wil, ndev->dev_addr);
 928
 929         wil_dbg_misc(wil, "NAPI enable\n");
 930         napi_enable(&wil->napi_rx);
 931         napi_enable(&wil->napi_tx);
 932         set_bit(wil_status_napi_en, wil->status);
 933
 934         if (wil->platform_ops.bus_request)
 935                 wil->platform_ops.bus_request(wil->platform_handle,
 936                                               WIL_MAX_BUS_REQUEST_KBPS);
 937
 938         return 0;
 939 }
 940
 941 int wil_up(struct wil6210_priv *wil)
 942 {
 943         int rc;
 944
 945         wil_dbg_misc(wil, "%s()\n", __func__);
 946
 947         mutex_lock(&wil->mutex);
 948         rc = __wil_up(wil);
 949         mutex_unlock(&wil->mutex);
 950
 951         return rc;
 952 }
 953
 954 int __wil_down(struct wil6210_priv *wil)
 955 {
 956         int iter = WAIT_FOR_DISCONNECT_TIMEOUT_MS /
 957                         WAIT_FOR_DISCONNECT_INTERVAL_MS;
 958
 959         WARN_ON(!mutex_is_locked(&wil->mutex));
 960
 961         if (wil->platform_ops.bus_request)
 962                 wil->platform_ops.bus_request(wil->platform_handle, 0);
 963
 964         wil_disable_irq(wil);
 965         if (test_and_clear_bit(wil_status_napi_en, wil->status)) {
 966                 napi_disable(&wil->napi_rx);
 967                 napi_disable(&wil->napi_tx);
 968                 wil_dbg_misc(wil, "NAPI disable\n");
 969         }
 970         wil_enable_irq(wil);
 971
 972         if (wil->scan_request) {
 973                 wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
 974                              wil->scan_request);
 975                 del_timer_sync(&wil->scan_timer);
 976                 cfg80211_scan_done(wil->scan_request, true);
 977                 wil->scan_request = NULL;
 978         }
 979
 980         if (test_bit(wil_status_fwconnected, wil->status) ||
 981             test_bit(wil_status_fwconnecting, wil->status))
 982                 wmi_send(wil, WMI_DISCONNECT_CMDID, NULL, 0);
 983
 984         /* make sure wil is idle (not connected) */
 985         mutex_unlock(&wil->mutex);
 986         while (iter--) {
 987                 int idle = !test_bit(wil_status_fwconnected, wil->status) &&
 988                            !test_bit(wil_status_fwconnecting, wil->status);
 989                 if (idle)
 990                         break;
 991                 msleep(WAIT_FOR_DISCONNECT_INTERVAL_MS);
 992         }
 993         mutex_lock(&wil->mutex);
 994
 995         if (!iter)
 996                 wil_err(wil, "timeout waiting for idle FW/HW\n");
 997
 998         wil_reset(wil, false);
 999
1000         return 0;
1001 }
1002
1003 int wil_down(struct wil6210_priv *wil)
1004 {
1005         int rc;
1006
1007         wil_dbg_misc(wil, "%s()\n", __func__);
1008
1009         wil_set_recovery_state(wil, fw_recovery_idle);
1010         mutex_lock(&wil->mutex);
1011         rc = __wil_down(wil);
1012         mutex_unlock(&wil->mutex);
1013
1014         return rc;
1015 }
1016
1017 int wil_find_cid(struct wil6210_priv *wil, const u8 *mac)
1018 {
1019         int i;
1020         int rc = -ENOENT;
1021
1022         for (i = 0; i < ARRAY_SIZE(wil->sta); i++) {
1023                 if ((wil->sta[i].status != wil_sta_unused) &&
1024                     ether_addr_equal(wil->sta[i].addr, mac)) {
1025                         rc = i;
1026                         break;
1027                 }
1028         }
1029
1030         return rc;
1031 }