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_HALP_VOTE_MS 100
  27
  28 bool debug_fw; /* = false; */
  29 module_param(debug_fw, bool, S_IRUGO);
  30 MODULE_PARM_DESC(debug_fw, " do not perform card reset. For FW debug");
  31
  32 static bool oob_mode;
  33 module_param(oob_mode, bool, S_IRUGO);
  34 MODULE_PARM_DESC(oob_mode,
  35                  " enable out of the box (OOB) mode in FW, for diagnostics and certification");
  36
  37 bool no_fw_recovery;
  38 module_param(no_fw_recovery, bool, S_IRUGO | S_IWUSR);
  39 MODULE_PARM_DESC(no_fw_recovery, " disable automatic FW error recovery");
  40
  41 /* if not set via modparam, will be set to default value of 1/8 of
  42  * rx ring size during init flow
  43  */
  44 unsigned short rx_ring_overflow_thrsh = WIL6210_RX_HIGH_TRSH_INIT;
  45 module_param(rx_ring_overflow_thrsh, ushort, S_IRUGO);
  46 MODULE_PARM_DESC(rx_ring_overflow_thrsh,
  47                  " RX ring overflow threshold in descriptors.");
  48
  49 /* We allow allocation of more than 1 page buffers to support large packets.
  50  * It is suboptimal behavior performance wise in case MTU above page size.
  51  */
  52 unsigned int mtu_max = TXRX_BUF_LEN_DEFAULT - WIL_MAX_MPDU_OVERHEAD;
  53 static int mtu_max_set(const char *val, const struct kernel_param *kp)
  54 {
  55         int ret;
  56
  57         /* sets mtu_max directly. no need to restore it in case of
  58          * illegal value since we assume this will fail insmod
  59          */
  60         ret = param_set_uint(val, kp);
  61         if (ret)
  62                 return ret;
  63
  64         if (mtu_max < 68 || mtu_max > WIL_MAX_ETH_MTU)
  65                 ret = -EINVAL;
  66
  67         return ret;
  68 }
  69
  70 static const struct kernel_param_ops mtu_max_ops = {
  71         .set = mtu_max_set,
  72         .get = param_get_uint,
  73 };
  74
  75 module_param_cb(mtu_max, &mtu_max_ops, &mtu_max, S_IRUGO);
  76 MODULE_PARM_DESC(mtu_max, " Max MTU value.");
  77
  78 static uint rx_ring_order = WIL_RX_RING_SIZE_ORDER_DEFAULT;
  79 static uint tx_ring_order = WIL_TX_RING_SIZE_ORDER_DEFAULT;
  80 static uint bcast_ring_order = WIL_BCAST_RING_SIZE_ORDER_DEFAULT;
  81
  82 static int ring_order_set(const char *val, const struct kernel_param *kp)
  83 {
  84         int ret;
  85         uint x;
  86
  87         ret = kstrtouint(val, 0, &x);
  88         if (ret)
  89                 return ret;
  90
  91         if ((x < WIL_RING_SIZE_ORDER_MIN) || (x > WIL_RING_SIZE_ORDER_MAX))
  92                 return -EINVAL;
  93
  94         *((uint *)kp->arg) = x;
  95
  96         return 0;
  97 }
  98
  99 static const struct kernel_param_ops ring_order_ops = {
 100         .set = ring_order_set,
 101         .get = param_get_uint,
 102 };
 103
 104 module_param_cb(rx_ring_order, &ring_order_ops, &rx_ring_order, S_IRUGO);
 105 MODULE_PARM_DESC(rx_ring_order, " Rx ring order; size = 1 << order");
 106 module_param_cb(tx_ring_order, &ring_order_ops, &tx_ring_order, S_IRUGO);
 107 MODULE_PARM_DESC(tx_ring_order, " Tx ring order; size = 1 << order");
 108 module_param_cb(bcast_ring_order, &ring_order_ops, &bcast_ring_order, S_IRUGO);
 109 MODULE_PARM_DESC(bcast_ring_order, " Bcast ring order; size = 1 << order");
 110
 111 #define RST_DELAY (20) /* msec, for loop in @wil_target_reset */
 112 #define RST_COUNT (1 + 1000/RST_DELAY) /* round up to be above 1 sec total */
 113
 114 /*
 115  * Due to a hardware issue,
 116  * one has to read/write to/from NIC in 32-bit chunks;
 117  * regular memcpy_fromio and siblings will
 118  * not work on 64-bit platform - it uses 64-bit transactions
 119  *
 120  * Force 32-bit transactions to enable NIC on 64-bit platforms
 121  *
 122  * To avoid byte swap on big endian host, __raw_{read|write}l
 123  * should be used - {read|write}l would swap bytes to provide
 124  * little endian on PCI value in host endianness.
 125  */
 126 void wil_memcpy_fromio_32(void *dst, const volatile void __iomem *src,
 127                           size_t count)
 128 {
 129         u32 *d = dst;
 130         const volatile u32 __iomem *s = src;
 131
 132         /* size_t is unsigned, if (count%4 != 0) it will wrap */
 133         for (count += 4; count > 4; count -= 4)
 134                 *d++ = __raw_readl(s++);
 135 }
 136
 137 void wil_memcpy_fromio_halp_vote(struct wil6210_priv *wil, void *dst,
 138                                  const volatile void __iomem *src, size_t count)
 139 {
 140         wil_halp_vote(wil);
 141         wil_memcpy_fromio_32(dst, src, count);
 142         wil_halp_unvote(wil);
 143 }
 144
 145 void wil_memcpy_toio_32(volatile void __iomem *dst, const void *src,
 146                         size_t count)
 147 {
 148         volatile u32 __iomem *d = dst;
 149         const u32 *s = src;
 150
 151         for (count += 4; count > 4; count -= 4)
 152                 __raw_writel(*s++, d++);
 153 }
 154
 155 void wil_memcpy_toio_halp_vote(struct wil6210_priv *wil,
 156                                volatile void __iomem *dst,
 157                                const void *src, size_t count)
 158 {
 159         wil_halp_vote(wil);
 160         wil_memcpy_toio_32(dst, src, count);
 161         wil_halp_unvote(wil);
 162 }
 163
 164 static void wil_disconnect_cid(struct wil6210_priv *wil, int cid,
 165                                u16 reason_code, bool from_event)
 166 __acquires(&sta->tid_rx_lock) __releases(&sta->tid_rx_lock)
 167 {
 168         uint i;
 169         struct net_device *ndev = wil_to_ndev(wil);
 170         struct wireless_dev *wdev = wil->wdev;
 171         struct wil_sta_info *sta = &wil->sta[cid];
 172
 173         might_sleep();
 174         wil_dbg_misc(wil, "%s(CID %d, status %d)\n", __func__, cid,
 175                      sta->status);
 176         /* inform upper/lower layers */
 177         if (sta->status != wil_sta_unused) {
 178                 if (!from_event)
 179                         wmi_disconnect_sta(wil, sta->addr, reason_code, true);
 180
 181                 switch (wdev->iftype) {
 182                 case NL80211_IFTYPE_AP:
 183                 case NL80211_IFTYPE_P2P_GO:
 184                         /* AP-like interface */
 185                         cfg80211_del_sta(ndev, sta->addr, GFP_KERNEL);
 186                         break;
 187                 default:
 188                         break;
 189                 }
 190                 sta->status = wil_sta_unused;
 191         }
 192         /* reorder buffers */
 193         for (i = 0; i < WIL_STA_TID_NUM; i++) {
 194                 struct wil_tid_ampdu_rx *r;
 195
 196                 spin_lock_bh(&sta->tid_rx_lock);
 197
 198                 r = sta->tid_rx[i];
 199                 sta->tid_rx[i] = NULL;
 200                 wil_tid_ampdu_rx_free(wil, r);
 201
 202                 spin_unlock_bh(&sta->tid_rx_lock);
 203         }
 204         /* crypto context */
 205         memset(sta->tid_crypto_rx, 0, sizeof(sta->tid_crypto_rx));
 206         memset(&sta->group_crypto_rx, 0, sizeof(sta->group_crypto_rx));
 207         /* release vrings */
 208         for (i = 0; i < ARRAY_SIZE(wil->vring_tx); i++) {
 209                 if (wil->vring2cid_tid[i][0] == cid)
 210                         wil_vring_fini_tx(wil, i);
 211         }
 212         /* statistics */
 213         memset(&sta->stats, 0, sizeof(sta->stats));
 214 }
 215
 216 static bool wil_ap_is_connected(struct wil6210_priv *wil)
 217 {
 218         int i;
 219
 220         for (i = 0; i < ARRAY_SIZE(wil->sta); i++) {
 221                 if (wil->sta[i].status == wil_sta_connected)
 222                         return true;
 223         }
 224
 225         return false;
 226 }
 227
 228 static void _wil6210_disconnect(struct wil6210_priv *wil, const u8 *bssid,
 229                                 u16 reason_code, bool from_event)
 230 {
 231         int cid = -ENOENT;
 232         struct net_device *ndev = wil_to_ndev(wil);
 233         struct wireless_dev *wdev = wil->wdev;
 234
 235         might_sleep();
 236         wil_info(wil, "%s(bssid=%pM, reason=%d, ev%s)\n", __func__, bssid,
 237                  reason_code, from_event ? "+" : "-");
 238
 239         /* Cases are:
 240          * - disconnect single STA, still connected
 241          * - disconnect single STA, already disconnected
 242          * - disconnect all
 243          *
 244          * For "disconnect all", there are 3 options:
 245          * - bssid == NULL
 246          * - bssid is broadcast address (ff:ff:ff:ff:ff:ff)
 247          * - bssid is our MAC address
 248          */
 249         if (bssid && !is_broadcast_ether_addr(bssid) &&
 250             !ether_addr_equal_unaligned(ndev->dev_addr, bssid)) {
 251                 cid = wil_find_cid(wil, bssid);
 252                 wil_dbg_misc(wil, "Disconnect %pM, CID=%d, reason=%d\n",
 253                              bssid, cid, reason_code);
 254                 if (cid >= 0) /* disconnect 1 peer */
 255                         wil_disconnect_cid(wil, cid, reason_code, from_event);
 256         } else { /* all */
 257                 wil_dbg_misc(wil, "Disconnect all\n");
 258                 for (cid = 0; cid < WIL6210_MAX_CID; cid++)
 259                         wil_disconnect_cid(wil, cid, reason_code, from_event);
 260         }
 261
 262         /* link state */
 263         switch (wdev->iftype) {
 264         case NL80211_IFTYPE_STATION:
 265         case NL80211_IFTYPE_P2P_CLIENT:
 266                 wil_bcast_fini(wil);
 267                 netif_tx_stop_all_queues(ndev);
 268                 netif_carrier_off(ndev);
 269
 270                 if (test_bit(wil_status_fwconnected, wil->status)) {
 271                         clear_bit(wil_status_fwconnected, wil->status);
 272                         cfg80211_disconnected(ndev, reason_code,
 273                                               NULL, 0, false, GFP_KERNEL);
 274                 } else if (test_bit(wil_status_fwconnecting, wil->status)) {
 275                         cfg80211_connect_result(ndev, bssid, NULL, 0, NULL, 0,
 276                                                 WLAN_STATUS_UNSPECIFIED_FAILURE,
 277                                                 GFP_KERNEL);
 278                 }
 279                 clear_bit(wil_status_fwconnecting, wil->status);
 280                 break;
 281         case NL80211_IFTYPE_AP:
 282         case NL80211_IFTYPE_P2P_GO:
 283                 if (!wil_ap_is_connected(wil))
 284                         clear_bit(wil_status_fwconnected, wil->status);
 285                 break;
 286         default:
 287                 break;
 288         }
 289 }
 290
 291 static void wil_disconnect_worker(struct work_struct *work)
 292 {
 293         struct wil6210_priv *wil = container_of(work,
 294                         struct wil6210_priv, disconnect_worker);
 295
 296         mutex_lock(&wil->mutex);
 297         _wil6210_disconnect(wil, NULL, WLAN_REASON_UNSPECIFIED, false);
 298         mutex_unlock(&wil->mutex);
 299 }
 300
 301 static void wil_connect_timer_fn(ulong x)
 302 {
 303         struct wil6210_priv *wil = (void *)x;
 304         bool q;
 305
 306         wil_err(wil, "Connect timeout detected, disconnect station\n");
 307
 308         /* reschedule to thread context - disconnect won't
 309          * run from atomic context.
 310          * queue on wmi_wq to prevent race with connect event.
 311          */
 312         q = queue_work(wil->wmi_wq, &wil->disconnect_worker);
 313         wil_dbg_wmi(wil, "queue_work of disconnect_worker -> %d\n", q);
 314 }
 315
 316 static void wil_scan_timer_fn(ulong x)
 317 {
 318         struct wil6210_priv *wil = (void *)x;
 319
 320         clear_bit(wil_status_fwready, wil->status);
 321         wil_err(wil, "Scan timeout detected, start fw error recovery\n");
 322         wil_fw_error_recovery(wil);
 323 }
 324
 325 static int wil_wait_for_recovery(struct wil6210_priv *wil)
 326 {
 327         if (wait_event_interruptible(wil->wq, wil->recovery_state !=
 328                                      fw_recovery_pending)) {
 329                 wil_err(wil, "Interrupt, canceling recovery\n");
 330                 return -ERESTARTSYS;
 331         }
 332         if (wil->recovery_state != fw_recovery_running) {
 333                 wil_info(wil, "Recovery cancelled\n");
 334                 return -EINTR;
 335         }
 336         wil_info(wil, "Proceed with recovery\n");
 337         return 0;
 338 }
 339
 340 void wil_set_recovery_state(struct wil6210_priv *wil, int state)
 341 {
 342         wil_dbg_misc(wil, "%s(%d -> %d)\n", __func__,
 343                      wil->recovery_state, state);
 344
 345         wil->recovery_state = state;
 346         wake_up_interruptible(&wil->wq);
 347 }
 348
 349 bool wil_is_recovery_blocked(struct wil6210_priv *wil)
 350 {
 351         return no_fw_recovery && (wil->recovery_state == fw_recovery_pending);
 352 }
 353
 354 static void wil_fw_error_worker(struct work_struct *work)
 355 {
 356         struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
 357                                                 fw_error_worker);
 358         struct wireless_dev *wdev = wil->wdev;
 359
 360         wil_dbg_misc(wil, "fw error worker\n");
 361
 362         if (!netif_running(wil_to_ndev(wil))) {
 363                 wil_info(wil, "No recovery - interface is down\n");
 364                 return;
 365         }
 366
 367         /* increment @recovery_count if less then WIL6210_FW_RECOVERY_TO
 368          * passed since last recovery attempt
 369          */
 370         if (time_is_after_jiffies(wil->last_fw_recovery +
 371                                   WIL6210_FW_RECOVERY_TO))
 372                 wil->recovery_count++;
 373         else
 374                 wil->recovery_count = 1; /* fw was alive for a long time */
 375
 376         if (wil->recovery_count > WIL6210_FW_RECOVERY_RETRIES) {
 377                 wil_err(wil, "too many recovery attempts (%d), giving up\n",
 378                         wil->recovery_count);
 379                 return;
 380         }
 381
 382         wil->last_fw_recovery = jiffies;
 383
 384         mutex_lock(&wil->mutex);
 385         switch (wdev->iftype) {
 386         case NL80211_IFTYPE_STATION:
 387         case NL80211_IFTYPE_P2P_CLIENT:
 388         case NL80211_IFTYPE_MONITOR:
 389                 wil_info(wil, "fw error recovery requested (try %d)...\n",
 390                          wil->recovery_count);
 391                 if (!no_fw_recovery)
 392                         wil->recovery_state = fw_recovery_running;
 393                 if (0 != wil_wait_for_recovery(wil))
 394                         break;
 395
 396                 __wil_down(wil);
 397                 __wil_up(wil);
 398                 break;
 399         case NL80211_IFTYPE_AP:
 400         case NL80211_IFTYPE_P2P_GO:
 401                 wil_info(wil, "No recovery for AP-like interface\n");
 402                 /* recovery in these modes is done by upper layers */
 403                 break;
 404         default:
 405                 wil_err(wil, "No recovery - unknown interface type %d\n",
 406                         wdev->iftype);
 407                 break;
 408         }
 409         mutex_unlock(&wil->mutex);
 410 }
 411
 412 static int wil_find_free_vring(struct wil6210_priv *wil)
 413 {
 414         int i;
 415
 416         for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
 417                 if (!wil->vring_tx[i].va)
 418                         return i;
 419         }
 420         return -EINVAL;
 421 }
 422
 423 int wil_tx_init(struct wil6210_priv *wil, int cid)
 424 {
 425         int rc = -EINVAL, ringid;
 426
 427         if (cid < 0) {
 428                 wil_err(wil, "No connection pending\n");
 429                 goto out;
 430         }
 431         ringid = wil_find_free_vring(wil);
 432         if (ringid < 0) {
 433                 wil_err(wil, "No free vring found\n");
 434                 goto out;
 435         }
 436
 437         wil_dbg_wmi(wil, "Configure for connection CID %d vring %d\n",
 438                     cid, ringid);
 439
 440         rc = wil_vring_init_tx(wil, ringid, 1 << tx_ring_order, cid, 0);
 441         if (rc)
 442                 wil_err(wil, "wil_vring_init_tx for CID %d vring %d failed\n",
 443                         cid, ringid);
 444
 445 out:
 446         return rc;
 447 }
 448
 449 int wil_bcast_init(struct wil6210_priv *wil)
 450 {
 451         int ri = wil->bcast_vring, rc;
 452
 453         if ((ri >= 0) && wil->vring_tx[ri].va)
 454                 return 0;
 455
 456         ri = wil_find_free_vring(wil);
 457         if (ri < 0)
 458                 return ri;
 459
 460         wil->bcast_vring = ri;
 461         rc = wil_vring_init_bcast(wil, ri, 1 << bcast_ring_order);
 462         if (rc)
 463                 wil->bcast_vring = -1;
 464
 465         return rc;
 466 }
 467
 468 void wil_bcast_fini(struct wil6210_priv *wil)
 469 {
 470         int ri = wil->bcast_vring;
 471
 472         if (ri < 0)
 473                 return;
 474
 475         wil->bcast_vring = -1;
 476         wil_vring_fini_tx(wil, ri);
 477 }
 478
 479 int wil_priv_init(struct wil6210_priv *wil)
 480 {
 481         uint i;
 482
 483         wil_dbg_misc(wil, "%s()\n", __func__);
 484
 485         memset(wil->sta, 0, sizeof(wil->sta));
 486         for (i = 0; i < WIL6210_MAX_CID; i++)
 487                 spin_lock_init(&wil->sta[i].tid_rx_lock);
 488
 489         for (i = 0; i < WIL6210_MAX_TX_RINGS; i++)
 490                 spin_lock_init(&wil->vring_tx_data[i].lock);
 491
 492         mutex_init(&wil->mutex);
 493         mutex_init(&wil->wmi_mutex);
 494         mutex_init(&wil->probe_client_mutex);
 495         mutex_init(&wil->p2p_wdev_mutex);
 496         mutex_init(&wil->halp.lock);
 497
 498         init_completion(&wil->wmi_ready);
 499         init_completion(&wil->wmi_call);
 500         init_completion(&wil->halp.comp);
 501
 502         wil->bcast_vring = -1;
 503         setup_timer(&wil->connect_timer, wil_connect_timer_fn, (ulong)wil);
 504         setup_timer(&wil->scan_timer, wil_scan_timer_fn, (ulong)wil);
 505         setup_timer(&wil->p2p.discovery_timer, wil_p2p_discovery_timer_fn,
 506                     (ulong)wil);
 507
 508         INIT_WORK(&wil->disconnect_worker, wil_disconnect_worker);
 509         INIT_WORK(&wil->wmi_event_worker, wmi_event_worker);
 510         INIT_WORK(&wil->fw_error_worker, wil_fw_error_worker);
 511         INIT_WORK(&wil->probe_client_worker, wil_probe_client_worker);
 512
 513         INIT_LIST_HEAD(&wil->pending_wmi_ev);
 514         INIT_LIST_HEAD(&wil->probe_client_pending);
 515         spin_lock_init(&wil->wmi_ev_lock);
 516         init_waitqueue_head(&wil->wq);
 517
 518         wil->wmi_wq = create_singlethread_workqueue(WIL_NAME "_wmi");
 519         if (!wil->wmi_wq)
 520                 return -EAGAIN;
 521
 522         wil->wq_service = create_singlethread_workqueue(WIL_NAME "_service");
 523         if (!wil->wq_service)
 524                 goto out_wmi_wq;
 525
 526         wil->last_fw_recovery = jiffies;
 527         wil->tx_interframe_timeout = WIL6210_ITR_TX_INTERFRAME_TIMEOUT_DEFAULT;
 528         wil->rx_interframe_timeout = WIL6210_ITR_RX_INTERFRAME_TIMEOUT_DEFAULT;
 529         wil->tx_max_burst_duration = WIL6210_ITR_TX_MAX_BURST_DURATION_DEFAULT;
 530         wil->rx_max_burst_duration = WIL6210_ITR_RX_MAX_BURST_DURATION_DEFAULT;
 531
 532         if (rx_ring_overflow_thrsh == WIL6210_RX_HIGH_TRSH_INIT)
 533                 rx_ring_overflow_thrsh = WIL6210_RX_HIGH_TRSH_DEFAULT;
 534         return 0;
 535
 536 out_wmi_wq:
 537         destroy_workqueue(wil->wmi_wq);
 538
 539         return -EAGAIN;
 540 }
 541
 542 /**
 543  * wil6210_disconnect - disconnect one connection
 544  * @wil: driver context
 545  * @bssid: peer to disconnect, NULL to disconnect all
 546  * @reason_code: Reason code for the Disassociation frame
 547  * @from_event: whether is invoked from FW event handler
 548  *
 549  * Disconnect and release associated resources. If invoked not from the
 550  * FW event handler, issue WMI command(s) to trigger MAC disconnect.
 551  */
 552 void wil6210_disconnect(struct wil6210_priv *wil, const u8 *bssid,
 553                         u16 reason_code, bool from_event)
 554 {
 555         wil_dbg_misc(wil, "%s()\n", __func__);
 556
 557         del_timer_sync(&wil->connect_timer);
 558         _wil6210_disconnect(wil, bssid, reason_code, from_event);
 559 }
 560
 561 void wil_priv_deinit(struct wil6210_priv *wil)
 562 {
 563         wil_dbg_misc(wil, "%s()\n", __func__);
 564
 565         wil_set_recovery_state(wil, fw_recovery_idle);
 566         del_timer_sync(&wil->scan_timer);
 567         del_timer_sync(&wil->p2p.discovery_timer);
 568         cancel_work_sync(&wil->disconnect_worker);
 569         cancel_work_sync(&wil->fw_error_worker);
 570         cancel_work_sync(&wil->p2p.discovery_expired_work);
 571         mutex_lock(&wil->mutex);
 572         wil6210_disconnect(wil, NULL, WLAN_REASON_DEAUTH_LEAVING, false);
 573         mutex_unlock(&wil->mutex);
 574         wmi_event_flush(wil);
 575         wil_probe_client_flush(wil);
 576         cancel_work_sync(&wil->probe_client_worker);
 577         destroy_workqueue(wil->wq_service);
 578         destroy_workqueue(wil->wmi_wq);
 579 }
 580
 581 static inline void wil_halt_cpu(struct wil6210_priv *wil)
 582 {
 583         wil_w(wil, RGF_USER_USER_CPU_0, BIT_USER_USER_CPU_MAN_RST);
 584         wil_w(wil, RGF_USER_MAC_CPU_0,  BIT_USER_MAC_CPU_MAN_RST);
 585 }
 586
 587 static inline void wil_release_cpu(struct wil6210_priv *wil)
 588 {
 589         /* Start CPU */
 590         wil_w(wil, RGF_USER_USER_CPU_0, 1);
 591 }
 592
 593 static void wil_set_oob_mode(struct wil6210_priv *wil, bool enable)
 594 {
 595         wil_info(wil, "%s: enable=%d\n", __func__, enable);
 596         if (enable)
 597                 wil_s(wil, RGF_USER_USAGE_6, BIT_USER_OOB_MODE);
 598         else
 599                 wil_c(wil, RGF_USER_USAGE_6, BIT_USER_OOB_MODE);
 600 }
 601
 602 static int wil_target_reset(struct wil6210_priv *wil)
 603 {
 604         int delay = 0;
 605         u32 x, x1 = 0;
 606
 607         wil_dbg_misc(wil, "Resetting \"%s\"...\n", wil->hw_name);
 608
 609         /* Clear MAC link up */
 610         wil_s(wil, RGF_HP_CTRL, BIT(15));
 611         wil_s(wil, RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT_HPAL_PERST_FROM_PAD);
 612         wil_s(wil, RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT_CAR_PERST_RST);
 613
 614         wil_halt_cpu(wil);
 615
 616         /* clear all boot loader "ready" bits */
 617         wil_w(wil, RGF_USER_BL +
 618               offsetof(struct bl_dedicated_registers_v0, boot_loader_ready), 0);
 619         /* Clear Fw Download notification */
 620         wil_c(wil, RGF_USER_USAGE_6, BIT(0));
 621
 622         wil_s(wil, RGF_CAF_OSC_CONTROL, BIT_CAF_OSC_XTAL_EN);
 623         /* XTAL stabilization should take about 3ms */
 624         usleep_range(5000, 7000);
 625         x = wil_r(wil, RGF_CAF_PLL_LOCK_STATUS);
 626         if (!(x & BIT_CAF_OSC_DIG_XTAL_STABLE)) {
 627                 wil_err(wil, "Xtal stabilization timeout\n"
 628                         "RGF_CAF_PLL_LOCK_STATUS = 0x%08x\n", x);
 629                 return -ETIME;
 630         }
 631         /* switch 10k to XTAL*/
 632         wil_c(wil, RGF_USER_SPARROW_M_4, BIT_SPARROW_M_4_SEL_SLEEP_OR_REF);
 633         /* 40 MHz */
 634         wil_c(wil, RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_CAR_AHB_SW_SEL);
 635
 636         wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x3ff81f);
 637         wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_1, 0xf);
 638
 639         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0xFE000000);
 640         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0x0000003F);
 641         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x000000f0);
 642         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0xFFE7FE00);
 643
 644         wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x0);
 645         wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_1, 0x0);
 646
 647         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0);
 648         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0);
 649         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0);
 650         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
 651
 652         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000003);
 653         /* reset A2 PCIE AHB */
 654         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00008000);
 655
 656         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
 657
 658         /* wait until device ready. typical time is 20..80 msec */
 659         do {
 660                 msleep(RST_DELAY);
 661                 x = wil_r(wil, RGF_USER_BL +
 662                           offsetof(struct bl_dedicated_registers_v0,
 663                                    boot_loader_ready));
 664                 if (x1 != x) {
 665                         wil_dbg_misc(wil, "BL.ready 0x%08x => 0x%08x\n", x1, x);
 666                         x1 = x;
 667                 }
 668                 if (delay++ > RST_COUNT) {
 669                         wil_err(wil, "Reset not completed, bl.ready 0x%08x\n",
 670                                 x);
 671                         return -ETIME;
 672                 }
 673         } while (x != BL_READY);
 674
 675         wil_c(wil, RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_RST_PWGD);
 676
 677         /* enable fix for HW bug related to the SA/DA swap in AP Rx */
 678         wil_s(wil, RGF_DMA_OFUL_NID_0, BIT_DMA_OFUL_NID_0_RX_EXT_TR_EN |
 679               BIT_DMA_OFUL_NID_0_RX_EXT_A3_SRC);
 680
 681         wil_dbg_misc(wil, "Reset completed in %d ms\n", delay * RST_DELAY);
 682         return 0;
 683 }
 684
 685 void wil_mbox_ring_le2cpus(struct wil6210_mbox_ring *r)
 686 {
 687         le32_to_cpus(&r->base);
 688         le16_to_cpus(&r->entry_size);
 689         le16_to_cpus(&r->size);
 690         le32_to_cpus(&r->tail);
 691         le32_to_cpus(&r->head);
 692 }
 693
 694 static int wil_get_bl_info(struct wil6210_priv *wil)
 695 {
 696         struct net_device *ndev = wil_to_ndev(wil);
 697         struct wiphy *wiphy = wil_to_wiphy(wil);
 698         union {
 699                 struct bl_dedicated_registers_v0 bl0;
 700                 struct bl_dedicated_registers_v1 bl1;
 701         } bl;
 702         u32 bl_ver;
 703         u8 *mac;
 704         u16 rf_status;
 705
 706         wil_memcpy_fromio_32(&bl, wil->csr + HOSTADDR(RGF_USER_BL),
 707                              sizeof(bl));
 708         bl_ver = le32_to_cpu(bl.bl0.boot_loader_struct_version);
 709         mac = bl.bl0.mac_address;
 710
 711         if (bl_ver == 0) {
 712                 le32_to_cpus(&bl.bl0.rf_type);
 713                 le32_to_cpus(&bl.bl0.baseband_type);
 714                 rf_status = 0; /* actually, unknown */
 715                 wil_info(wil,
 716                          "Boot Loader struct v%d: MAC = %pM RF = 0x%08x bband = 0x%08x\n",
 717                          bl_ver, mac,
 718                          bl.bl0.rf_type, bl.bl0.baseband_type);
 719                 wil_info(wil, "Boot Loader build unknown for struct v0\n");
 720         } else {
 721                 le16_to_cpus(&bl.bl1.rf_type);
 722                 rf_status = le16_to_cpu(bl.bl1.rf_status);
 723                 le32_to_cpus(&bl.bl1.baseband_type);
 724                 le16_to_cpus(&bl.bl1.bl_version_subminor);
 725                 le16_to_cpus(&bl.bl1.bl_version_build);
 726                 wil_info(wil,
 727                          "Boot Loader struct v%d: MAC = %pM RF = 0x%04x (status 0x%04x) bband = 0x%08x\n",
 728                          bl_ver, mac,
 729                          bl.bl1.rf_type, rf_status,
 730                          bl.bl1.baseband_type);
 731                 wil_info(wil, "Boot Loader build %d.%d.%d.%d\n",
 732                          bl.bl1.bl_version_major, bl.bl1.bl_version_minor,
 733                          bl.bl1.bl_version_subminor, bl.bl1.bl_version_build);
 734         }
 735
 736         if (!is_valid_ether_addr(mac)) {
 737                 wil_err(wil, "BL: Invalid MAC %pM\n", mac);
 738                 return -EINVAL;
 739         }
 740
 741         ether_addr_copy(ndev->perm_addr, mac);
 742         ether_addr_copy(wiphy->perm_addr, mac);
 743         if (!is_valid_ether_addr(ndev->dev_addr))
 744                 ether_addr_copy(ndev->dev_addr, mac);
 745
 746         if (rf_status) {/* bad RF cable? */
 747                 wil_err(wil, "RF communication error 0x%04x",
 748                         rf_status);
 749                 return -EAGAIN;
 750         }
 751
 752         return 0;
 753 }
 754
 755 static void wil_bl_crash_info(struct wil6210_priv *wil, bool is_err)
 756 {
 757         u32 bl_assert_code, bl_assert_blink, bl_magic_number;
 758         u32 bl_ver = wil_r(wil, RGF_USER_BL +
 759                            offsetof(struct bl_dedicated_registers_v0,
 760                                     boot_loader_struct_version));
 761
 762         if (bl_ver < 2)
 763                 return;
 764
 765         bl_assert_code = wil_r(wil, RGF_USER_BL +
 766                                offsetof(struct bl_dedicated_registers_v1,
 767                                         bl_assert_code));
 768         bl_assert_blink = wil_r(wil, RGF_USER_BL +
 769                                 offsetof(struct bl_dedicated_registers_v1,
 770                                          bl_assert_blink));
 771         bl_magic_number = wil_r(wil, RGF_USER_BL +
 772                                 offsetof(struct bl_dedicated_registers_v1,
 773                                          bl_magic_number));
 774
 775         if (is_err) {
 776                 wil_err(wil,
 777                         "BL assert code 0x%08x blink 0x%08x magic 0x%08x\n",
 778                         bl_assert_code, bl_assert_blink, bl_magic_number);
 779         } else {
 780                 wil_dbg_misc(wil,
 781                              "BL assert code 0x%08x blink 0x%08x magic 0x%08x\n",
 782                              bl_assert_code, bl_assert_blink, bl_magic_number);
 783         }
 784 }
 785
 786 static int wil_wait_for_fw_ready(struct wil6210_priv *wil)
 787 {
 788         ulong to = msecs_to_jiffies(1000);
 789         ulong left = wait_for_completion_timeout(&wil->wmi_ready, to);
 790
 791         if (0 == left) {
 792                 wil_err(wil, "Firmware not ready\n");
 793                 return -ETIME;
 794         } else {
 795                 wil_info(wil, "FW ready after %d ms. HW version 0x%08x\n",
 796                          jiffies_to_msecs(to-left), wil->hw_version);
 797         }
 798         return 0;
 799 }
 800
 801 /*
 802  * We reset all the structures, and we reset the UMAC.
 803  * After calling this routine, you're expected to reload
 804  * the firmware.
 805  */
 806 int wil_reset(struct wil6210_priv *wil, bool load_fw)
 807 {
 808         int rc;
 809
 810         wil_dbg_misc(wil, "%s()\n", __func__);
 811
 812         WARN_ON(!mutex_is_locked(&wil->mutex));
 813         WARN_ON(test_bit(wil_status_napi_en, wil->status));
 814
 815         if (debug_fw) {
 816                 static const u8 mac[ETH_ALEN] = {
 817                         0x00, 0xde, 0xad, 0x12, 0x34, 0x56,
 818                 };
 819                 struct net_device *ndev = wil_to_ndev(wil);
 820
 821                 ether_addr_copy(ndev->perm_addr, mac);
 822                 ether_addr_copy(ndev->dev_addr, ndev->perm_addr);
 823                 return 0;
 824         }
 825
 826         if (wil->hw_version == HW_VER_UNKNOWN)
 827                 return -ENODEV;
 828
 829         if (wil->platform_ops.notify) {
 830                 rc = wil->platform_ops.notify(wil->platform_handle,
 831                                               WIL_PLATFORM_EVT_PRE_RESET);
 832                 if (rc)
 833                         wil_err(wil,
 834                                 "%s: PRE_RESET platform notify failed, rc %d\n",
 835                                 __func__, rc);
 836         }
 837
 838         set_bit(wil_status_resetting, wil->status);
 839
 840         cancel_work_sync(&wil->disconnect_worker);
 841         wil6210_disconnect(wil, NULL, WLAN_REASON_DEAUTH_LEAVING, false);
 842         wil_bcast_fini(wil);
 843
 844         /* Disable device led before reset*/
 845         wmi_led_cfg(wil, false);
 846
 847         /* prevent NAPI from being scheduled and prevent wmi commands */
 848         mutex_lock(&wil->wmi_mutex);
 849         bitmap_zero(wil->status, wil_status_last);
 850         mutex_unlock(&wil->wmi_mutex);
 851
 852         if (wil->scan_request) {
 853                 wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
 854                              wil->scan_request);
 855                 del_timer_sync(&wil->scan_timer);
 856                 cfg80211_scan_done(wil->scan_request, true);
 857                 wil->scan_request = NULL;
 858         }
 859
 860         wil_mask_irq(wil);
 861
 862         wmi_event_flush(wil);
 863
 864         flush_workqueue(wil->wq_service);
 865         flush_workqueue(wil->wmi_wq);
 866
 867         wil_bl_crash_info(wil, false);
 868         rc = wil_target_reset(wil);
 869         wil_rx_fini(wil);
 870         if (rc) {
 871                 wil_bl_crash_info(wil, true);
 872                 return rc;
 873         }
 874
 875         rc = wil_get_bl_info(wil);
 876         if (rc == -EAGAIN && !load_fw) /* ignore RF error if not going up */
 877                 rc = 0;
 878         if (rc)
 879                 return rc;
 880
 881         wil_set_oob_mode(wil, oob_mode);
 882         if (load_fw) {
 883                 wil_info(wil, "Use firmware <%s> + board <%s>\n", WIL_FW_NAME,
 884                          WIL_FW2_NAME);
 885
 886                 wil_halt_cpu(wil);
 887                 /* Loading f/w from the file */
 888                 rc = wil_request_firmware(wil, WIL_FW_NAME);
 889                 if (rc)
 890                         return rc;
 891                 rc = wil_request_firmware(wil, WIL_FW2_NAME);
 892                 if (rc)
 893                         return rc;
 894
 895                 /* Mark FW as loaded from host */
 896                 wil_s(wil, RGF_USER_USAGE_6, 1);
 897
 898                 /* clear any interrupts which on-card-firmware
 899                  * may have set
 900                  */
 901                 wil6210_clear_irq(wil);
 902                 /* CAF_ICR - clear and mask */
 903                 /* it is W1C, clear by writing back same value */
 904                 wil_s(wil, RGF_CAF_ICR + offsetof(struct RGF_ICR, ICR), 0);
 905                 wil_w(wil, RGF_CAF_ICR + offsetof(struct RGF_ICR, IMV), ~0);
 906
 907                 wil_release_cpu(wil);
 908         }
 909
 910         /* init after reset */
 911         wil->ap_isolate = 0;
 912         reinit_completion(&wil->wmi_ready);
 913         reinit_completion(&wil->wmi_call);
 914         reinit_completion(&wil->halp.comp);
 915
 916         if (load_fw) {
 917                 wil_configure_interrupt_moderation(wil);
 918                 wil_unmask_irq(wil);
 919
 920                 /* we just started MAC, wait for FW ready */
 921                 rc = wil_wait_for_fw_ready(wil);
 922                 if (rc)
 923                         return rc;
 924
 925                 /* check FW is responsive */
 926                 rc = wmi_echo(wil);
 927                 if (rc) {
 928                         wil_err(wil, "%s: wmi_echo failed, rc %d\n",
 929                                 __func__, rc);
 930                         return rc;
 931                 }
 932
 933                 if (wil->platform_ops.notify) {
 934                         rc = wil->platform_ops.notify(wil->platform_handle,
 935                                                       WIL_PLATFORM_EVT_FW_RDY);
 936                         if (rc) {
 937                                 wil_err(wil,
 938                                         "%s: FW_RDY notify failed, rc %d\n",
 939                                         __func__, rc);
 940                                 rc = 0;
 941                         }
 942                 }
 943         }
 944
 945         return rc;
 946 }
 947
 948 void wil_fw_error_recovery(struct wil6210_priv *wil)
 949 {
 950         wil_dbg_misc(wil, "starting fw error recovery\n");
 951
 952         if (test_bit(wil_status_resetting, wil->status)) {
 953                 wil_info(wil, "Reset already in progress\n");
 954                 return;
 955         }
 956
 957         wil->recovery_state = fw_recovery_pending;
 958         schedule_work(&wil->fw_error_worker);
 959 }
 960
 961 int __wil_up(struct wil6210_priv *wil)
 962 {
 963         struct net_device *ndev = wil_to_ndev(wil);
 964         struct wireless_dev *wdev = wil->wdev;
 965         int rc;
 966
 967         WARN_ON(!mutex_is_locked(&wil->mutex));
 968
 969         rc = wil_reset(wil, true);
 970         if (rc)
 971                 return rc;
 972
 973         /* Rx VRING. After MAC and beacon */
 974         rc = wil_rx_init(wil, 1 << rx_ring_order);
 975         if (rc)
 976                 return rc;
 977
 978         switch (wdev->iftype) {
 979         case NL80211_IFTYPE_STATION:
 980                 wil_dbg_misc(wil, "type: STATION\n");
 981                 ndev->type = ARPHRD_ETHER;
 982                 break;
 983         case NL80211_IFTYPE_AP:
 984                 wil_dbg_misc(wil, "type: AP\n");
 985                 ndev->type = ARPHRD_ETHER;
 986                 break;
 987         case NL80211_IFTYPE_P2P_CLIENT:
 988                 wil_dbg_misc(wil, "type: P2P_CLIENT\n");
 989                 ndev->type = ARPHRD_ETHER;
 990                 break;
 991         case NL80211_IFTYPE_P2P_GO:
 992                 wil_dbg_misc(wil, "type: P2P_GO\n");
 993                 ndev->type = ARPHRD_ETHER;
 994                 break;
 995         case NL80211_IFTYPE_MONITOR:
 996                 wil_dbg_misc(wil, "type: Monitor\n");
 997                 ndev->type = ARPHRD_IEEE80211_RADIOTAP;
 998                 /* ARPHRD_IEEE80211 or ARPHRD_IEEE80211_RADIOTAP ? */
 999                 break;
1000         default:
1001                 return -EOPNOTSUPP;
1002         }
1003
1004         /* MAC address - pre-requisite for other commands */
1005         wmi_set_mac_address(wil, ndev->dev_addr);
1006
1007         wil_dbg_misc(wil, "NAPI enable\n");
1008         napi_enable(&wil->napi_rx);
1009         napi_enable(&wil->napi_tx);
1010         set_bit(wil_status_napi_en, wil->status);
1011
1012         if (wil->platform_ops.bus_request)
1013                 wil->platform_ops.bus_request(wil->platform_handle,
1014                                               WIL_MAX_BUS_REQUEST_KBPS);
1015
1016         return 0;
1017 }
1018
1019 int wil_up(struct wil6210_priv *wil)
1020 {
1021         int rc;
1022
1023         wil_dbg_misc(wil, "%s()\n", __func__);
1024
1025         mutex_lock(&wil->mutex);
1026         rc = __wil_up(wil);
1027         mutex_unlock(&wil->mutex);
1028
1029         return rc;
1030 }
1031
1032 int __wil_down(struct wil6210_priv *wil)
1033 {
1034         int rc;
1035
1036         WARN_ON(!mutex_is_locked(&wil->mutex));
1037
1038         if (wil->platform_ops.bus_request)
1039                 wil->platform_ops.bus_request(wil->platform_handle, 0);
1040
1041         wil_disable_irq(wil);
1042         if (test_and_clear_bit(wil_status_napi_en, wil->status)) {
1043                 napi_disable(&wil->napi_rx);
1044                 napi_disable(&wil->napi_tx);
1045                 wil_dbg_misc(wil, "NAPI disable\n");
1046         }
1047         wil_enable_irq(wil);
1048
1049         (void)wil_p2p_stop_discovery(wil);
1050
1051         if (wil->scan_request) {
1052                 wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
1053                              wil->scan_request);
1054                 del_timer_sync(&wil->scan_timer);
1055                 cfg80211_scan_done(wil->scan_request, true);
1056                 wil->scan_request = NULL;
1057         }
1058
1059         if (test_bit(wil_status_fwconnected, wil->status) ||
1060             test_bit(wil_status_fwconnecting, wil->status)) {
1061
1062                 mutex_unlock(&wil->mutex);
1063                 rc = wmi_call(wil, WMI_DISCONNECT_CMDID, NULL, 0,
1064                               WMI_DISCONNECT_EVENTID, NULL, 0,
1065                               WIL6210_DISCONNECT_TO_MS);
1066                 mutex_lock(&wil->mutex);
1067                 if (rc)
1068                         wil_err(wil, "timeout waiting for disconnect\n");
1069         }
1070
1071         wil_reset(wil, false);
1072
1073         return 0;
1074 }
1075
1076 int wil_down(struct wil6210_priv *wil)
1077 {
1078         int rc;
1079
1080         wil_dbg_misc(wil, "%s()\n", __func__);
1081
1082         wil_set_recovery_state(wil, fw_recovery_idle);
1083         mutex_lock(&wil->mutex);
1084         rc = __wil_down(wil);
1085         mutex_unlock(&wil->mutex);
1086
1087         return rc;
1088 }
1089
1090 int wil_find_cid(struct wil6210_priv *wil, const u8 *mac)
1091 {
1092         int i;
1093         int rc = -ENOENT;
1094
1095         for (i = 0; i < ARRAY_SIZE(wil->sta); i++) {
1096                 if ((wil->sta[i].status != wil_sta_unused) &&
1097                     ether_addr_equal(wil->sta[i].addr, mac)) {
1098                         rc = i;
1099                         break;
1100                 }
1101         }
1102
1103         return rc;
1104 }
1105
1106 void wil_halp_vote(struct wil6210_priv *wil)
1107 {
1108         unsigned long rc;
1109         unsigned long to_jiffies = msecs_to_jiffies(WAIT_FOR_HALP_VOTE_MS);
1110
1111         mutex_lock(&wil->halp.lock);
1112
1113         wil_dbg_misc(wil, "%s: start, HALP ref_cnt (%d)\n", __func__,
1114                      wil->halp.ref_cnt);
1115
1116         if (++wil->halp.ref_cnt == 1) {
1117                 wil6210_set_halp(wil);
1118                 rc = wait_for_completion_timeout(&wil->halp.comp, to_jiffies);
1119                 if (!rc)
1120                         wil_err(wil, "%s: HALP vote timed out\n", __func__);
1121                 else
1122                         wil_dbg_misc(wil,
1123                                      "%s: HALP vote completed after %d ms\n",
1124                                      __func__,
1125                                      jiffies_to_msecs(to_jiffies - rc));
1126         }
1127
1128         wil_dbg_misc(wil, "%s: end, HALP ref_cnt (%d)\n", __func__,
1129                      wil->halp.ref_cnt);
1130
1131         mutex_unlock(&wil->halp.lock);
1132 }
1133
1134 void wil_halp_unvote(struct wil6210_priv *wil)
1135 {
1136         WARN_ON(wil->halp.ref_cnt == 0);
1137
1138         mutex_lock(&wil->halp.lock);
1139
1140         wil_dbg_misc(wil, "%s: start, HALP ref_cnt (%d)\n", __func__,
1141                      wil->halp.ref_cnt);
1142
1143         if (--wil->halp.ref_cnt == 0) {
1144                 wil6210_clear_halp(wil);
1145                 wil_dbg_misc(wil, "%s: HALP unvote\n", __func__);
1146         }
1147
1148         wil_dbg_misc(wil, "%s: end, HALP ref_cnt (%d)\n", __func__,
1149                      wil->halp.ref_cnt);
1150
1151         mutex_unlock(&wil->halp.lock);
1152 }