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

   1 /*
   2  * Copyright (c) 2012-2016 Qualcomm Atheros, Inc.
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #include <linux/moduleparam.h>
  18 #include <linux/if_arp.h>
  19 #include <linux/etherdevice.h>
  20
  21 #include "wil6210.h"
  22 #include "txrx.h"
  23 #include "wmi.h"
  24 #include "boot_loader.h"
  25
  26 #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, true);
 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_info(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         bool q;
 262
 263         wil_err(wil, "Connect timeout detected, disconnect station\n");
 264
 265         /* reschedule to thread context - disconnect won't
 266          * run from atomic context.
 267          * queue on wmi_wq to prevent race with connect event.
 268          */
 269         q = queue_work(wil->wmi_wq, &wil->disconnect_worker);
 270         wil_dbg_wmi(wil, "queue_work of disconnect_worker -> %d\n", q);
 271 }
 272
 273 static void wil_scan_timer_fn(ulong x)
 274 {
 275         struct wil6210_priv *wil = (void *)x;
 276
 277         clear_bit(wil_status_fwready, wil->status);
 278         wil_err(wil, "Scan timeout detected, start fw error recovery\n");
 279         wil_fw_error_recovery(wil);
 280 }
 281
 282 static int wil_wait_for_recovery(struct wil6210_priv *wil)
 283 {
 284         if (wait_event_interruptible(wil->wq, wil->recovery_state !=
 285                                      fw_recovery_pending)) {
 286                 wil_err(wil, "Interrupt, canceling recovery\n");
 287                 return -ERESTARTSYS;
 288         }
 289         if (wil->recovery_state != fw_recovery_running) {
 290                 wil_info(wil, "Recovery cancelled\n");
 291                 return -EINTR;
 292         }
 293         wil_info(wil, "Proceed with recovery\n");
 294         return 0;
 295 }
 296
 297 void wil_set_recovery_state(struct wil6210_priv *wil, int state)
 298 {
 299         wil_dbg_misc(wil, "%s(%d -> %d)\n", __func__,
 300                      wil->recovery_state, state);
 301
 302         wil->recovery_state = state;
 303         wake_up_interruptible(&wil->wq);
 304 }
 305
 306 static void wil_fw_error_worker(struct work_struct *work)
 307 {
 308         struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
 309                                                 fw_error_worker);
 310         struct wireless_dev *wdev = wil->wdev;
 311
 312         wil_dbg_misc(wil, "fw error worker\n");
 313
 314         if (!netif_running(wil_to_ndev(wil))) {
 315                 wil_info(wil, "No recovery - interface is down\n");
 316                 return;
 317         }
 318
 319         /* increment @recovery_count if less then WIL6210_FW_RECOVERY_TO
 320          * passed since last recovery attempt
 321          */
 322         if (time_is_after_jiffies(wil->last_fw_recovery +
 323                                   WIL6210_FW_RECOVERY_TO))
 324                 wil->recovery_count++;
 325         else
 326                 wil->recovery_count = 1; /* fw was alive for a long time */
 327
 328         if (wil->recovery_count > WIL6210_FW_RECOVERY_RETRIES) {
 329                 wil_err(wil, "too many recovery attempts (%d), giving up\n",
 330                         wil->recovery_count);
 331                 return;
 332         }
 333
 334         wil->last_fw_recovery = jiffies;
 335
 336         mutex_lock(&wil->mutex);
 337         switch (wdev->iftype) {
 338         case NL80211_IFTYPE_STATION:
 339         case NL80211_IFTYPE_P2P_CLIENT:
 340         case NL80211_IFTYPE_MONITOR:
 341                 wil_info(wil, "fw error recovery requested (try %d)...\n",
 342                          wil->recovery_count);
 343                 if (!no_fw_recovery)
 344                         wil->recovery_state = fw_recovery_running;
 345                 if (0 != wil_wait_for_recovery(wil))
 346                         break;
 347
 348                 __wil_down(wil);
 349                 __wil_up(wil);
 350                 break;
 351         case NL80211_IFTYPE_AP:
 352         case NL80211_IFTYPE_P2P_GO:
 353                 wil_info(wil, "No recovery for AP-like interface\n");
 354                 /* recovery in these modes is done by upper layers */
 355                 break;
 356         default:
 357                 wil_err(wil, "No recovery - unknown interface type %d\n",
 358                         wdev->iftype);
 359                 break;
 360         }
 361         mutex_unlock(&wil->mutex);
 362 }
 363
 364 static int wil_find_free_vring(struct wil6210_priv *wil)
 365 {
 366         int i;
 367
 368         for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
 369                 if (!wil->vring_tx[i].va)
 370                         return i;
 371         }
 372         return -EINVAL;
 373 }
 374
 375 int wil_tx_init(struct wil6210_priv *wil, int cid)
 376 {
 377         int rc = -EINVAL, ringid;
 378
 379         if (cid < 0) {
 380                 wil_err(wil, "No connection pending\n");
 381                 goto out;
 382         }
 383         ringid = wil_find_free_vring(wil);
 384         if (ringid < 0) {
 385                 wil_err(wil, "No free vring found\n");
 386                 goto out;
 387         }
 388
 389         wil_dbg_wmi(wil, "Configure for connection CID %d vring %d\n",
 390                     cid, ringid);
 391
 392         rc = wil_vring_init_tx(wil, ringid, 1 << tx_ring_order, cid, 0);
 393         if (rc)
 394                 wil_err(wil, "wil_vring_init_tx for CID %d vring %d failed\n",
 395                         cid, ringid);
 396
 397 out:
 398         return rc;
 399 }
 400
 401 int wil_bcast_init(struct wil6210_priv *wil)
 402 {
 403         int ri = wil->bcast_vring, rc;
 404
 405         if ((ri >= 0) && wil->vring_tx[ri].va)
 406                 return 0;
 407
 408         ri = wil_find_free_vring(wil);
 409         if (ri < 0)
 410                 return ri;
 411
 412         wil->bcast_vring = ri;
 413         rc = wil_vring_init_bcast(wil, ri, 1 << bcast_ring_order);
 414         if (rc)
 415                 wil->bcast_vring = -1;
 416
 417         return rc;
 418 }
 419
 420 void wil_bcast_fini(struct wil6210_priv *wil)
 421 {
 422         int ri = wil->bcast_vring;
 423
 424         if (ri < 0)
 425                 return;
 426
 427         wil->bcast_vring = -1;
 428         wil_vring_fini_tx(wil, ri);
 429 }
 430
 431 int wil_priv_init(struct wil6210_priv *wil)
 432 {
 433         uint i;
 434
 435         wil_dbg_misc(wil, "%s()\n", __func__);
 436
 437         memset(wil->sta, 0, sizeof(wil->sta));
 438         for (i = 0; i < WIL6210_MAX_CID; i++)
 439                 spin_lock_init(&wil->sta[i].tid_rx_lock);
 440
 441         for (i = 0; i < WIL6210_MAX_TX_RINGS; i++)
 442                 spin_lock_init(&wil->vring_tx_data[i].lock);
 443
 444         mutex_init(&wil->mutex);
 445         mutex_init(&wil->wmi_mutex);
 446         mutex_init(&wil->back_rx_mutex);
 447         mutex_init(&wil->back_tx_mutex);
 448         mutex_init(&wil->probe_client_mutex);
 449
 450         init_completion(&wil->wmi_ready);
 451         init_completion(&wil->wmi_call);
 452
 453         wil->bcast_vring = -1;
 454         setup_timer(&wil->connect_timer, wil_connect_timer_fn, (ulong)wil);
 455         setup_timer(&wil->scan_timer, wil_scan_timer_fn, (ulong)wil);
 456
 457         INIT_WORK(&wil->disconnect_worker, wil_disconnect_worker);
 458         INIT_WORK(&wil->wmi_event_worker, wmi_event_worker);
 459         INIT_WORK(&wil->fw_error_worker, wil_fw_error_worker);
 460         INIT_WORK(&wil->back_rx_worker, wil_back_rx_worker);
 461         INIT_WORK(&wil->back_tx_worker, wil_back_tx_worker);
 462         INIT_WORK(&wil->probe_client_worker, wil_probe_client_worker);
 463
 464         INIT_LIST_HEAD(&wil->pending_wmi_ev);
 465         INIT_LIST_HEAD(&wil->back_rx_pending);
 466         INIT_LIST_HEAD(&wil->back_tx_pending);
 467         INIT_LIST_HEAD(&wil->probe_client_pending);
 468         spin_lock_init(&wil->wmi_ev_lock);
 469         init_waitqueue_head(&wil->wq);
 470
 471         wil->wmi_wq = create_singlethread_workqueue(WIL_NAME "_wmi");
 472         if (!wil->wmi_wq)
 473                 return -EAGAIN;
 474
 475         wil->wq_service = create_singlethread_workqueue(WIL_NAME "_service");
 476         if (!wil->wq_service)
 477                 goto out_wmi_wq;
 478
 479         wil->last_fw_recovery = jiffies;
 480         wil->tx_interframe_timeout = WIL6210_ITR_TX_INTERFRAME_TIMEOUT_DEFAULT;
 481         wil->rx_interframe_timeout = WIL6210_ITR_RX_INTERFRAME_TIMEOUT_DEFAULT;
 482         wil->tx_max_burst_duration = WIL6210_ITR_TX_MAX_BURST_DURATION_DEFAULT;
 483         wil->rx_max_burst_duration = WIL6210_ITR_RX_MAX_BURST_DURATION_DEFAULT;
 484
 485         if (rx_ring_overflow_thrsh == WIL6210_RX_HIGH_TRSH_INIT)
 486                 rx_ring_overflow_thrsh = WIL6210_RX_HIGH_TRSH_DEFAULT;
 487         return 0;
 488
 489 out_wmi_wq:
 490         destroy_workqueue(wil->wmi_wq);
 491
 492         return -EAGAIN;
 493 }
 494
 495 /**
 496  * wil6210_disconnect - disconnect one connection
 497  * @wil: driver context
 498  * @bssid: peer to disconnect, NULL to disconnect all
 499  * @reason_code: Reason code for the Disassociation frame
 500  * @from_event: whether is invoked from FW event handler
 501  *
 502  * Disconnect and release associated resources. If invoked not from the
 503  * FW event handler, issue WMI command(s) to trigger MAC disconnect.
 504  */
 505 void wil6210_disconnect(struct wil6210_priv *wil, const u8 *bssid,
 506                         u16 reason_code, bool from_event)
 507 {
 508         wil_dbg_misc(wil, "%s()\n", __func__);
 509
 510         del_timer_sync(&wil->connect_timer);
 511         _wil6210_disconnect(wil, bssid, reason_code, from_event);
 512 }
 513
 514 void wil_priv_deinit(struct wil6210_priv *wil)
 515 {
 516         wil_dbg_misc(wil, "%s()\n", __func__);
 517
 518         wil_set_recovery_state(wil, fw_recovery_idle);
 519         del_timer_sync(&wil->scan_timer);
 520         cancel_work_sync(&wil->disconnect_worker);
 521         cancel_work_sync(&wil->fw_error_worker);
 522         mutex_lock(&wil->mutex);
 523         wil6210_disconnect(wil, NULL, WLAN_REASON_DEAUTH_LEAVING, false);
 524         mutex_unlock(&wil->mutex);
 525         wmi_event_flush(wil);
 526         wil_back_rx_flush(wil);
 527         cancel_work_sync(&wil->back_rx_worker);
 528         wil_back_tx_flush(wil);
 529         cancel_work_sync(&wil->back_tx_worker);
 530         wil_probe_client_flush(wil);
 531         cancel_work_sync(&wil->probe_client_worker);
 532         destroy_workqueue(wil->wq_service);
 533         destroy_workqueue(wil->wmi_wq);
 534 }
 535
 536 static inline void wil_halt_cpu(struct wil6210_priv *wil)
 537 {
 538         wil_w(wil, RGF_USER_USER_CPU_0, BIT_USER_USER_CPU_MAN_RST);
 539         wil_w(wil, RGF_USER_MAC_CPU_0,  BIT_USER_MAC_CPU_MAN_RST);
 540 }
 541
 542 static inline void wil_release_cpu(struct wil6210_priv *wil)
 543 {
 544         /* Start CPU */
 545         wil_w(wil, RGF_USER_USER_CPU_0, 1);
 546 }
 547
 548 static int wil_target_reset(struct wil6210_priv *wil)
 549 {
 550         int delay = 0;
 551         u32 x, x1 = 0;
 552
 553         wil_dbg_misc(wil, "Resetting \"%s\"...\n", wil->hw_name);
 554
 555         /* Clear MAC link up */
 556         wil_s(wil, RGF_HP_CTRL, BIT(15));
 557         wil_s(wil, RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT_HPAL_PERST_FROM_PAD);
 558         wil_s(wil, RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT_CAR_PERST_RST);
 559
 560         wil_halt_cpu(wil);
 561
 562         /* clear all boot loader "ready" bits */
 563         wil_w(wil, RGF_USER_BL +
 564               offsetof(struct bl_dedicated_registers_v0, boot_loader_ready), 0);
 565         /* Clear Fw Download notification */
 566         wil_c(wil, RGF_USER_USAGE_6, BIT(0));
 567
 568         wil_s(wil, RGF_CAF_OSC_CONTROL, BIT_CAF_OSC_XTAL_EN);
 569         /* XTAL stabilization should take about 3ms */
 570         usleep_range(5000, 7000);
 571         x = wil_r(wil, RGF_CAF_PLL_LOCK_STATUS);
 572         if (!(x & BIT_CAF_OSC_DIG_XTAL_STABLE)) {
 573                 wil_err(wil, "Xtal stabilization timeout\n"
 574                         "RGF_CAF_PLL_LOCK_STATUS = 0x%08x\n", x);
 575                 return -ETIME;
 576         }
 577         /* switch 10k to XTAL*/
 578         wil_c(wil, RGF_USER_SPARROW_M_4, BIT_SPARROW_M_4_SEL_SLEEP_OR_REF);
 579         /* 40 MHz */
 580         wil_c(wil, RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_CAR_AHB_SW_SEL);
 581
 582         wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x3ff81f);
 583         wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_1, 0xf);
 584
 585         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0xFE000000);
 586         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0x0000003F);
 587         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x000000f0);
 588         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0xFFE7FE00);
 589
 590         wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x0);
 591         wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_1, 0x0);
 592
 593         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0);
 594         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0);
 595         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0);
 596         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
 597
 598         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000003);
 599         /* reset A2 PCIE AHB */
 600         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00008000);
 601
 602         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
 603
 604         /* wait until device ready. typical time is 20..80 msec */
 605         do {
 606                 msleep(RST_DELAY);
 607                 x = wil_r(wil, RGF_USER_BL +
 608                           offsetof(struct bl_dedicated_registers_v0,
 609                                    boot_loader_ready));
 610                 if (x1 != x) {
 611                         wil_dbg_misc(wil, "BL.ready 0x%08x => 0x%08x\n", x1, x);
 612                         x1 = x;
 613                 }
 614                 if (delay++ > RST_COUNT) {
 615                         wil_err(wil, "Reset not completed, bl.ready 0x%08x\n",
 616                                 x);
 617                         return -ETIME;
 618                 }
 619         } while (x != BL_READY);
 620
 621         wil_c(wil, RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_RST_PWGD);
 622
 623         /* enable fix for HW bug related to the SA/DA swap in AP Rx */
 624         wil_s(wil, RGF_DMA_OFUL_NID_0, BIT_DMA_OFUL_NID_0_RX_EXT_TR_EN |
 625               BIT_DMA_OFUL_NID_0_RX_EXT_A3_SRC);
 626
 627         wil_dbg_misc(wil, "Reset completed in %d ms\n", delay * RST_DELAY);
 628         return 0;
 629 }
 630
 631 void wil_mbox_ring_le2cpus(struct wil6210_mbox_ring *r)
 632 {
 633         le32_to_cpus(&r->base);
 634         le16_to_cpus(&r->entry_size);
 635         le16_to_cpus(&r->size);
 636         le32_to_cpus(&r->tail);
 637         le32_to_cpus(&r->head);
 638 }
 639
 640 static int wil_get_bl_info(struct wil6210_priv *wil)
 641 {
 642         struct net_device *ndev = wil_to_ndev(wil);
 643         union {
 644                 struct bl_dedicated_registers_v0 bl0;
 645                 struct bl_dedicated_registers_v1 bl1;
 646         } bl;
 647         u32 bl_ver;
 648         u8 *mac;
 649         u16 rf_status;
 650
 651         wil_memcpy_fromio_32(&bl, wil->csr + HOSTADDR(RGF_USER_BL),
 652                              sizeof(bl));
 653         bl_ver = le32_to_cpu(bl.bl0.boot_loader_struct_version);
 654         mac = bl.bl0.mac_address;
 655
 656         if (bl_ver == 0) {
 657                 le32_to_cpus(&bl.bl0.rf_type);
 658                 le32_to_cpus(&bl.bl0.baseband_type);
 659                 rf_status = 0; /* actually, unknown */
 660                 wil_info(wil,
 661                          "Boot Loader struct v%d: MAC = %pM RF = 0x%08x bband = 0x%08x\n",
 662                          bl_ver, mac,
 663                          bl.bl0.rf_type, bl.bl0.baseband_type);
 664                 wil_info(wil, "Boot Loader build unknown for struct v0\n");
 665         } else {
 666                 le16_to_cpus(&bl.bl1.rf_type);
 667                 rf_status = le16_to_cpu(bl.bl1.rf_status);
 668                 le32_to_cpus(&bl.bl1.baseband_type);
 669                 le16_to_cpus(&bl.bl1.bl_version_subminor);
 670                 le16_to_cpus(&bl.bl1.bl_version_build);
 671                 wil_info(wil,
 672                          "Boot Loader struct v%d: MAC = %pM RF = 0x%04x (status 0x%04x) bband = 0x%08x\n",
 673                          bl_ver, mac,
 674                          bl.bl1.rf_type, rf_status,
 675                          bl.bl1.baseband_type);
 676                 wil_info(wil, "Boot Loader build %d.%d.%d.%d\n",
 677                          bl.bl1.bl_version_major, bl.bl1.bl_version_minor,
 678                          bl.bl1.bl_version_subminor, bl.bl1.bl_version_build);
 679         }
 680
 681         if (!is_valid_ether_addr(mac)) {
 682                 wil_err(wil, "BL: Invalid MAC %pM\n", mac);
 683                 return -EINVAL;
 684         }
 685
 686         ether_addr_copy(ndev->perm_addr, mac);
 687         if (!is_valid_ether_addr(ndev->dev_addr))
 688                 ether_addr_copy(ndev->dev_addr, mac);
 689
 690         if (rf_status) {/* bad RF cable? */
 691                 wil_err(wil, "RF communication error 0x%04x",
 692                         rf_status);
 693                 return -EAGAIN;
 694         }
 695
 696         return 0;
 697 }
 698
 699 static void wil_bl_crash_info(struct wil6210_priv *wil, bool is_err)
 700 {
 701         u32 bl_assert_code, bl_assert_blink, bl_magic_number;
 702         u32 bl_ver = wil_r(wil, RGF_USER_BL +
 703                            offsetof(struct bl_dedicated_registers_v0,
 704                                     boot_loader_struct_version));
 705
 706         if (bl_ver < 2)
 707                 return;
 708
 709         bl_assert_code = wil_r(wil, RGF_USER_BL +
 710                                offsetof(struct bl_dedicated_registers_v1,
 711                                         bl_assert_code));
 712         bl_assert_blink = wil_r(wil, RGF_USER_BL +
 713                                 offsetof(struct bl_dedicated_registers_v1,
 714                                          bl_assert_blink));
 715         bl_magic_number = wil_r(wil, RGF_USER_BL +
 716                                 offsetof(struct bl_dedicated_registers_v1,
 717                                          bl_magic_number));
 718
 719         if (is_err) {
 720                 wil_err(wil,
 721                         "BL assert code 0x%08x blink 0x%08x magic 0x%08x\n",
 722                         bl_assert_code, bl_assert_blink, bl_magic_number);
 723         } else {
 724                 wil_dbg_misc(wil,
 725                              "BL assert code 0x%08x blink 0x%08x magic 0x%08x\n",
 726                              bl_assert_code, bl_assert_blink, bl_magic_number);
 727         }
 728 }
 729
 730 static int wil_wait_for_fw_ready(struct wil6210_priv *wil)
 731 {
 732         ulong to = msecs_to_jiffies(1000);
 733         ulong left = wait_for_completion_timeout(&wil->wmi_ready, to);
 734
 735         if (0 == left) {
 736                 wil_err(wil, "Firmware not ready\n");
 737                 return -ETIME;
 738         } else {
 739                 wil_info(wil, "FW ready after %d ms. HW version 0x%08x\n",
 740                          jiffies_to_msecs(to-left), wil->hw_version);
 741         }
 742         return 0;
 743 }
 744
 745 /*
 746  * We reset all the structures, and we reset the UMAC.
 747  * After calling this routine, you're expected to reload
 748  * the firmware.
 749  */
 750 int wil_reset(struct wil6210_priv *wil, bool load_fw)
 751 {
 752         int rc;
 753
 754         wil_dbg_misc(wil, "%s()\n", __func__);
 755
 756         WARN_ON(!mutex_is_locked(&wil->mutex));
 757         WARN_ON(test_bit(wil_status_napi_en, wil->status));
 758
 759         if (debug_fw) {
 760                 static const u8 mac[ETH_ALEN] = {
 761                         0x00, 0xde, 0xad, 0x12, 0x34, 0x56,
 762                 };
 763                 struct net_device *ndev = wil_to_ndev(wil);
 764
 765                 ether_addr_copy(ndev->perm_addr, mac);
 766                 ether_addr_copy(ndev->dev_addr, ndev->perm_addr);
 767                 return 0;
 768         }
 769
 770         if (wil->hw_version == HW_VER_UNKNOWN)
 771                 return -ENODEV;
 772
 773         set_bit(wil_status_resetting, wil->status);
 774
 775         cancel_work_sync(&wil->disconnect_worker);
 776         wil6210_disconnect(wil, NULL, WLAN_REASON_DEAUTH_LEAVING, false);
 777         wil_bcast_fini(wil);
 778
 779         /* prevent NAPI from being scheduled and prevent wmi commands */
 780         mutex_lock(&wil->wmi_mutex);
 781         bitmap_zero(wil->status, wil_status_last);
 782         mutex_unlock(&wil->wmi_mutex);
 783
 784         if (wil->scan_request) {
 785                 wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
 786                              wil->scan_request);
 787                 del_timer_sync(&wil->scan_timer);
 788                 cfg80211_scan_done(wil->scan_request, true);
 789                 wil->scan_request = NULL;
 790         }
 791
 792         wil_mask_irq(wil);
 793
 794         wmi_event_flush(wil);
 795
 796         flush_workqueue(wil->wq_service);
 797         flush_workqueue(wil->wmi_wq);
 798
 799         wil_bl_crash_info(wil, false);
 800         rc = wil_target_reset(wil);
 801         wil_rx_fini(wil);
 802         if (rc) {
 803                 wil_bl_crash_info(wil, true);
 804                 return rc;
 805         }
 806
 807         rc = wil_get_bl_info(wil);
 808         if (rc == -EAGAIN && !load_fw) /* ignore RF error if not going up */
 809                 rc = 0;
 810         if (rc)
 811                 return rc;
 812
 813         if (load_fw) {
 814                 wil_info(wil, "Use firmware <%s> + board <%s>\n", WIL_FW_NAME,
 815                          WIL_FW2_NAME);
 816
 817                 wil_halt_cpu(wil);
 818                 /* Loading f/w from the file */
 819                 rc = wil_request_firmware(wil, WIL_FW_NAME);
 820                 if (rc)
 821                         return rc;
 822                 rc = wil_request_firmware(wil, WIL_FW2_NAME);
 823                 if (rc)
 824                         return rc;
 825
 826                 /* Mark FW as loaded from host */
 827                 wil_s(wil, RGF_USER_USAGE_6, 1);
 828
 829                 /* clear any interrupts which on-card-firmware
 830                  * may have set
 831                  */
 832                 wil6210_clear_irq(wil);
 833                 /* CAF_ICR - clear and mask */
 834                 /* it is W1C, clear by writing back same value */
 835                 wil_s(wil, RGF_CAF_ICR + offsetof(struct RGF_ICR, ICR), 0);
 836                 wil_w(wil, RGF_CAF_ICR + offsetof(struct RGF_ICR, IMV), ~0);
 837
 838                 wil_release_cpu(wil);
 839         }
 840
 841         /* init after reset */
 842         wil->ap_isolate = 0;
 843         reinit_completion(&wil->wmi_ready);
 844         reinit_completion(&wil->wmi_call);
 845
 846         if (load_fw) {
 847                 wil_configure_interrupt_moderation(wil);
 848                 wil_unmask_irq(wil);
 849
 850                 /* we just started MAC, wait for FW ready */
 851                 rc = wil_wait_for_fw_ready(wil);
 852                 if (rc == 0) /* check FW is responsive */
 853                         rc = wmi_echo(wil);
 854         }
 855
 856         return rc;
 857 }
 858
 859 void wil_fw_error_recovery(struct wil6210_priv *wil)
 860 {
 861         wil_dbg_misc(wil, "starting fw error recovery\n");
 862
 863         if (test_bit(wil_status_resetting, wil->status)) {
 864                 wil_info(wil, "Reset already in progress\n");
 865                 return;
 866         }
 867
 868         wil->recovery_state = fw_recovery_pending;
 869         schedule_work(&wil->fw_error_worker);
 870 }
 871
 872 int __wil_up(struct wil6210_priv *wil)
 873 {
 874         struct net_device *ndev = wil_to_ndev(wil);
 875         struct wireless_dev *wdev = wil->wdev;
 876         int rc;
 877
 878         WARN_ON(!mutex_is_locked(&wil->mutex));
 879
 880         rc = wil_reset(wil, true);
 881         if (rc)
 882                 return rc;
 883
 884         /* Rx VRING. After MAC and beacon */
 885         rc = wil_rx_init(wil, 1 << rx_ring_order);
 886         if (rc)
 887                 return rc;
 888
 889         switch (wdev->iftype) {
 890         case NL80211_IFTYPE_STATION:
 891                 wil_dbg_misc(wil, "type: STATION\n");
 892                 ndev->type = ARPHRD_ETHER;
 893                 break;
 894         case NL80211_IFTYPE_AP:
 895                 wil_dbg_misc(wil, "type: AP\n");
 896                 ndev->type = ARPHRD_ETHER;
 897                 break;
 898         case NL80211_IFTYPE_P2P_CLIENT:
 899                 wil_dbg_misc(wil, "type: P2P_CLIENT\n");
 900                 ndev->type = ARPHRD_ETHER;
 901                 break;
 902         case NL80211_IFTYPE_P2P_GO:
 903                 wil_dbg_misc(wil, "type: P2P_GO\n");
 904                 ndev->type = ARPHRD_ETHER;
 905                 break;
 906         case NL80211_IFTYPE_MONITOR:
 907                 wil_dbg_misc(wil, "type: Monitor\n");
 908                 ndev->type = ARPHRD_IEEE80211_RADIOTAP;
 909                 /* ARPHRD_IEEE80211 or ARPHRD_IEEE80211_RADIOTAP ? */
 910                 break;
 911         default:
 912                 return -EOPNOTSUPP;
 913         }
 914
 915         /* MAC address - pre-requisite for other commands */
 916         wmi_set_mac_address(wil, ndev->dev_addr);
 917
 918         wil_dbg_misc(wil, "NAPI enable\n");
 919         napi_enable(&wil->napi_rx);
 920         napi_enable(&wil->napi_tx);
 921         set_bit(wil_status_napi_en, wil->status);
 922
 923         if (wil->platform_ops.bus_request)
 924                 wil->platform_ops.bus_request(wil->platform_handle,
 925                                               WIL_MAX_BUS_REQUEST_KBPS);
 926
 927         return 0;
 928 }
 929
 930 int wil_up(struct wil6210_priv *wil)
 931 {
 932         int rc;
 933
 934         wil_dbg_misc(wil, "%s()\n", __func__);
 935
 936         mutex_lock(&wil->mutex);
 937         rc = __wil_up(wil);
 938         mutex_unlock(&wil->mutex);
 939
 940         return rc;
 941 }
 942
 943 int __wil_down(struct wil6210_priv *wil)
 944 {
 945         int iter = WAIT_FOR_DISCONNECT_TIMEOUT_MS /
 946                         WAIT_FOR_DISCONNECT_INTERVAL_MS;
 947
 948         WARN_ON(!mutex_is_locked(&wil->mutex));
 949
 950         if (wil->platform_ops.bus_request)
 951                 wil->platform_ops.bus_request(wil->platform_handle, 0);
 952
 953         wil_disable_irq(wil);
 954         if (test_and_clear_bit(wil_status_napi_en, wil->status)) {
 955                 napi_disable(&wil->napi_rx);
 956                 napi_disable(&wil->napi_tx);
 957                 wil_dbg_misc(wil, "NAPI disable\n");
 958         }
 959         wil_enable_irq(wil);
 960
 961         if (wil->scan_request) {
 962                 wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
 963                              wil->scan_request);
 964                 del_timer_sync(&wil->scan_timer);
 965                 cfg80211_scan_done(wil->scan_request, true);
 966                 wil->scan_request = NULL;
 967         }
 968
 969         if (test_bit(wil_status_fwconnected, wil->status) ||
 970             test_bit(wil_status_fwconnecting, wil->status))
 971                 wmi_send(wil, WMI_DISCONNECT_CMDID, NULL, 0);
 972
 973         /* make sure wil is idle (not connected) */
 974         mutex_unlock(&wil->mutex);
 975         while (iter--) {
 976                 int idle = !test_bit(wil_status_fwconnected, wil->status) &&
 977                            !test_bit(wil_status_fwconnecting, wil->status);
 978                 if (idle)
 979                         break;
 980                 msleep(WAIT_FOR_DISCONNECT_INTERVAL_MS);
 981         }
 982         mutex_lock(&wil->mutex);
 983
 984         if (iter < 0)
 985                 wil_err(wil, "timeout waiting for idle FW/HW\n");
 986
 987         wil_reset(wil, false);
 988
 989         return 0;
 990 }
 991
 992 int wil_down(struct wil6210_priv *wil)
 993 {
 994         int rc;
 995
 996         wil_dbg_misc(wil, "%s()\n", __func__);
 997
 998         wil_set_recovery_state(wil, fw_recovery_idle);
 999         mutex_lock(&wil->mutex);
1000         rc = __wil_down(wil);
1001         mutex_unlock(&wil->mutex);
1002
1003         return rc;
1004 }
1005
1006 int wil_find_cid(struct wil6210_priv *wil, const u8 *mac)
1007 {
1008         int i;
1009         int rc = -ENOENT;
1010
1011         for (i = 0; i < ARRAY_SIZE(wil->sta); i++) {
1012                 if ((wil->sta[i].status != wil_sta_unused) &&
1013                     ether_addr_equal(wil->sta[i].addr, mac)) {
1014                         rc = i;
1015                         break;
1016                 }
1017         }
1018
1019         return rc;
1020 }