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

   1 /*
   2  * Copyright (c) 2012-2014 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
  25 #define WAIT_FOR_DISCONNECT_TIMEOUT_MS 2000
  26 #define WAIT_FOR_DISCONNECT_INTERVAL_MS 10
  27
  28 bool no_fw_recovery;
  29 module_param(no_fw_recovery, bool, S_IRUGO | S_IWUSR);
  30 MODULE_PARM_DESC(no_fw_recovery, " disable automatic FW error recovery");
  31
  32 static bool no_fw_load = true;
  33 module_param(no_fw_load, bool, S_IRUGO | S_IWUSR);
  34 MODULE_PARM_DESC(no_fw_load, " do not download FW, use one in on-card flash.");
  35
  36 static unsigned int itr_trsh = WIL6210_ITR_TRSH_DEFAULT;
  37
  38 module_param(itr_trsh, uint, S_IRUGO);
  39 MODULE_PARM_DESC(itr_trsh, " Interrupt moderation threshold, usecs.");
  40
  41 /* We allow allocation of more than 1 page buffers to support large packets.
  42  * It is suboptimal behavior performance wise in case MTU above page size.
  43  */
  44 unsigned int mtu_max = TXRX_BUF_LEN_DEFAULT - WIL_MAX_MPDU_OVERHEAD;
  45 static int mtu_max_set(const char *val, const struct kernel_param *kp)
  46 {
  47         int ret;
  48
  49         /* sets mtu_max directly. no need to restore it in case of
  50          * illegal value since we assume this will fail insmod
  51          */
  52         ret = param_set_uint(val, kp);
  53         if (ret)
  54                 return ret;
  55
  56         if (mtu_max < 68 || mtu_max > WIL_MAX_ETH_MTU)
  57                 ret = -EINVAL;
  58
  59         return ret;
  60 }
  61
  62 static struct kernel_param_ops mtu_max_ops = {
  63         .set = mtu_max_set,
  64         .get = param_get_uint,
  65 };
  66
  67 module_param_cb(mtu_max, &mtu_max_ops, &mtu_max, S_IRUGO);
  68 MODULE_PARM_DESC(mtu_max, " Max MTU value.");
  69
  70 static uint rx_ring_order = WIL_RX_RING_SIZE_ORDER_DEFAULT;
  71 static uint tx_ring_order = WIL_TX_RING_SIZE_ORDER_DEFAULT;
  72
  73 static int ring_order_set(const char *val, const struct kernel_param *kp)
  74 {
  75         int ret;
  76         uint x;
  77
  78         ret = kstrtouint(val, 0, &x);
  79         if (ret)
  80                 return ret;
  81
  82         if ((x < WIL_RING_SIZE_ORDER_MIN) || (x > WIL_RING_SIZE_ORDER_MAX))
  83                 return -EINVAL;
  84
  85         *((uint *)kp->arg) = x;
  86
  87         return 0;
  88 }
  89
  90 static struct kernel_param_ops ring_order_ops = {
  91         .set = ring_order_set,
  92         .get = param_get_uint,
  93 };
  94
  95 module_param_cb(rx_ring_order, &ring_order_ops, &rx_ring_order, S_IRUGO);
  96 MODULE_PARM_DESC(rx_ring_order, " Rx ring order; size = 1 << order");
  97 module_param_cb(tx_ring_order, &ring_order_ops, &tx_ring_order, S_IRUGO);
  98 MODULE_PARM_DESC(tx_ring_order, " Tx ring order; size = 1 << order");
  99
 100 #define RST_DELAY (20) /* msec, for loop in @wil_target_reset */
 101 #define RST_COUNT (1 + 1000/RST_DELAY) /* round up to be above 1 sec total */
 102
 103 /*
 104  * Due to a hardware issue,
 105  * one has to read/write to/from NIC in 32-bit chunks;
 106  * regular memcpy_fromio and siblings will
 107  * not work on 64-bit platform - it uses 64-bit transactions
 108  *
 109  * Force 32-bit transactions to enable NIC on 64-bit platforms
 110  *
 111  * To avoid byte swap on big endian host, __raw_{read|write}l
 112  * should be used - {read|write}l would swap bytes to provide
 113  * little endian on PCI value in host endianness.
 114  */
 115 void wil_memcpy_fromio_32(void *dst, const volatile void __iomem *src,
 116                           size_t count)
 117 {
 118         u32 *d = dst;
 119         const volatile u32 __iomem *s = src;
 120
 121         /* size_t is unsigned, if (count%4 != 0) it will wrap */
 122         for (count += 4; count > 4; count -= 4)
 123                 *d++ = __raw_readl(s++);
 124 }
 125
 126 void wil_memcpy_toio_32(volatile void __iomem *dst, const void *src,
 127                         size_t count)
 128 {
 129         volatile u32 __iomem *d = dst;
 130         const u32 *s = src;
 131
 132         for (count += 4; count > 4; count -= 4)
 133                 __raw_writel(*s++, d++);
 134 }
 135
 136 static void wil_disconnect_cid(struct wil6210_priv *wil, int cid,
 137                                u16 reason_code, bool from_event)
 138 {
 139         uint i;
 140         struct net_device *ndev = wil_to_ndev(wil);
 141         struct wireless_dev *wdev = wil->wdev;
 142         struct wil_sta_info *sta = &wil->sta[cid];
 143
 144         wil_dbg_misc(wil, "%s(CID %d, status %d)\n", __func__, cid,
 145                      sta->status);
 146
 147         sta->data_port_open = false;
 148         if (sta->status != wil_sta_unused) {
 149                 if (!from_event)
 150                         wmi_disconnect_sta(wil, sta->addr, reason_code);
 151
 152                 switch (wdev->iftype) {
 153                 case NL80211_IFTYPE_AP:
 154                 case NL80211_IFTYPE_P2P_GO:
 155                         /* AP-like interface */
 156                         cfg80211_del_sta(ndev, sta->addr, GFP_KERNEL);
 157                         break;
 158                 default:
 159                         break;
 160                 }
 161                 sta->status = wil_sta_unused;
 162         }
 163
 164         for (i = 0; i < WIL_STA_TID_NUM; i++) {
 165                 struct wil_tid_ampdu_rx *r;
 166                 unsigned long flags;
 167
 168                 spin_lock_irqsave(&sta->tid_rx_lock, flags);
 169
 170                 r = sta->tid_rx[i];
 171                 sta->tid_rx[i] = NULL;
 172                 wil_tid_ampdu_rx_free(wil, r);
 173
 174                 spin_unlock_irqrestore(&sta->tid_rx_lock, flags);
 175         }
 176         for (i = 0; i < ARRAY_SIZE(wil->vring_tx); i++) {
 177                 if (wil->vring2cid_tid[i][0] == cid)
 178                         wil_vring_fini_tx(wil, i);
 179         }
 180         memset(&sta->stats, 0, sizeof(sta->stats));
 181 }
 182
 183 static void _wil6210_disconnect(struct wil6210_priv *wil, const u8 *bssid,
 184                                 u16 reason_code, bool from_event)
 185 {
 186         int cid = -ENOENT;
 187         struct net_device *ndev = wil_to_ndev(wil);
 188         struct wireless_dev *wdev = wil->wdev;
 189
 190         might_sleep();
 191         wil_dbg_misc(wil, "%s(bssid=%pM, reason=%d, ev%s)\n", __func__, bssid,
 192                      reason_code, from_event ? "+" : "-");
 193
 194         /* Cases are:
 195          * - disconnect single STA, still connected
 196          * - disconnect single STA, already disconnected
 197          * - disconnect all
 198          *
 199          * For "disconnect all", there are 2 options:
 200          * - bssid == NULL
 201          * - bssid is our MAC address
 202          */
 203         if (bssid && memcmp(ndev->dev_addr, bssid, ETH_ALEN)) {
 204                 cid = wil_find_cid(wil, bssid);
 205                 wil_dbg_misc(wil, "Disconnect %pM, CID=%d, reason=%d\n",
 206                              bssid, cid, reason_code);
 207                 if (cid >= 0) /* disconnect 1 peer */
 208                         wil_disconnect_cid(wil, cid, reason_code, from_event);
 209         } else { /* all */
 210                 wil_dbg_misc(wil, "Disconnect all\n");
 211                 for (cid = 0; cid < WIL6210_MAX_CID; cid++)
 212                         wil_disconnect_cid(wil, cid, reason_code, from_event);
 213         }
 214
 215         /* link state */
 216         switch (wdev->iftype) {
 217         case NL80211_IFTYPE_STATION:
 218         case NL80211_IFTYPE_P2P_CLIENT:
 219                 wil_link_off(wil);
 220                 if (test_bit(wil_status_fwconnected, wil->status)) {
 221                         clear_bit(wil_status_fwconnected, wil->status);
 222                         cfg80211_disconnected(ndev, reason_code,
 223                                               NULL, 0, GFP_KERNEL);
 224                 } else if (test_bit(wil_status_fwconnecting, wil->status)) {
 225                         cfg80211_connect_result(ndev, bssid, NULL, 0, NULL, 0,
 226                                                 WLAN_STATUS_UNSPECIFIED_FAILURE,
 227                                                 GFP_KERNEL);
 228                 }
 229                 clear_bit(wil_status_fwconnecting, wil->status);
 230                 break;
 231         default:
 232                 break;
 233         }
 234 }
 235
 236 static void wil_disconnect_worker(struct work_struct *work)
 237 {
 238         struct wil6210_priv *wil = container_of(work,
 239                         struct wil6210_priv, disconnect_worker);
 240
 241         mutex_lock(&wil->mutex);
 242         _wil6210_disconnect(wil, NULL, WLAN_REASON_UNSPECIFIED, false);
 243         mutex_unlock(&wil->mutex);
 244 }
 245
 246 static void wil_connect_timer_fn(ulong x)
 247 {
 248         struct wil6210_priv *wil = (void *)x;
 249
 250         wil_dbg_misc(wil, "Connect timeout\n");
 251
 252         /* reschedule to thread context - disconnect won't
 253          * run from atomic context
 254          */
 255         schedule_work(&wil->disconnect_worker);
 256 }
 257
 258 static void wil_scan_timer_fn(ulong x)
 259 {
 260         struct wil6210_priv *wil = (void *)x;
 261
 262         clear_bit(wil_status_fwready, wil->status);
 263         wil_err(wil, "Scan timeout detected, start fw error recovery\n");
 264         wil->recovery_state = fw_recovery_pending;
 265         schedule_work(&wil->fw_error_worker);
 266 }
 267
 268 static int wil_wait_for_recovery(struct wil6210_priv *wil)
 269 {
 270         if (wait_event_interruptible(wil->wq, wil->recovery_state !=
 271                                      fw_recovery_pending)) {
 272                 wil_err(wil, "Interrupt, canceling recovery\n");
 273                 return -ERESTARTSYS;
 274         }
 275         if (wil->recovery_state != fw_recovery_running) {
 276                 wil_info(wil, "Recovery cancelled\n");
 277                 return -EINTR;
 278         }
 279         wil_info(wil, "Proceed with recovery\n");
 280         return 0;
 281 }
 282
 283 void wil_set_recovery_state(struct wil6210_priv *wil, int state)
 284 {
 285         wil_dbg_misc(wil, "%s(%d -> %d)\n", __func__,
 286                      wil->recovery_state, state);
 287
 288         wil->recovery_state = state;
 289         wake_up_interruptible(&wil->wq);
 290 }
 291
 292 static void wil_fw_error_worker(struct work_struct *work)
 293 {
 294         struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
 295                                                 fw_error_worker);
 296         struct wireless_dev *wdev = wil->wdev;
 297
 298         wil_dbg_misc(wil, "fw error worker\n");
 299
 300         if (!netif_running(wil_to_ndev(wil))) {
 301                 wil_info(wil, "No recovery - interface is down\n");
 302                 return;
 303         }
 304
 305         /* increment @recovery_count if less then WIL6210_FW_RECOVERY_TO
 306          * passed since last recovery attempt
 307          */
 308         if (time_is_after_jiffies(wil->last_fw_recovery +
 309                                   WIL6210_FW_RECOVERY_TO))
 310                 wil->recovery_count++;
 311         else
 312                 wil->recovery_count = 1; /* fw was alive for a long time */
 313
 314         if (wil->recovery_count > WIL6210_FW_RECOVERY_RETRIES) {
 315                 wil_err(wil, "too many recovery attempts (%d), giving up\n",
 316                         wil->recovery_count);
 317                 return;
 318         }
 319
 320         wil->last_fw_recovery = jiffies;
 321
 322         mutex_lock(&wil->mutex);
 323         switch (wdev->iftype) {
 324         case NL80211_IFTYPE_STATION:
 325         case NL80211_IFTYPE_P2P_CLIENT:
 326         case NL80211_IFTYPE_MONITOR:
 327                 wil_info(wil, "fw error recovery requested (try %d)...\n",
 328                          wil->recovery_count);
 329                 if (!no_fw_recovery)
 330                         wil->recovery_state = fw_recovery_running;
 331                 if (0 != wil_wait_for_recovery(wil))
 332                         break;
 333
 334                 __wil_down(wil);
 335                 __wil_up(wil);
 336                 break;
 337         case NL80211_IFTYPE_AP:
 338         case NL80211_IFTYPE_P2P_GO:
 339                 wil_info(wil, "No recovery for AP-like interface\n");
 340                 /* recovery in these modes is done by upper layers */
 341                 break;
 342         default:
 343                 wil_err(wil, "No recovery - unknown interface type %d\n",
 344                         wdev->iftype);
 345                 break;
 346         }
 347         mutex_unlock(&wil->mutex);
 348 }
 349
 350 static int wil_find_free_vring(struct wil6210_priv *wil)
 351 {
 352         int i;
 353
 354         for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
 355                 if (!wil->vring_tx[i].va)
 356                         return i;
 357         }
 358         return -EINVAL;
 359 }
 360
 361 static void wil_connect_worker(struct work_struct *work)
 362 {
 363         int rc;
 364         struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
 365                                                 connect_worker);
 366         int cid = wil->pending_connect_cid;
 367         int ringid = wil_find_free_vring(wil);
 368
 369         if (cid < 0) {
 370                 wil_err(wil, "No connection pending\n");
 371                 return;
 372         }
 373
 374         wil_dbg_wmi(wil, "Configure for connection CID %d\n", cid);
 375
 376         rc = wil_vring_init_tx(wil, ringid, 1 << tx_ring_order, cid, 0);
 377         wil->pending_connect_cid = -1;
 378         if (rc == 0) {
 379                 wil->sta[cid].status = wil_sta_connected;
 380                 wil_link_on(wil);
 381         } else {
 382                 wil->sta[cid].status = wil_sta_unused;
 383         }
 384 }
 385
 386 int wil_priv_init(struct wil6210_priv *wil)
 387 {
 388         uint i;
 389
 390         wil_dbg_misc(wil, "%s()\n", __func__);
 391
 392         memset(wil->sta, 0, sizeof(wil->sta));
 393         for (i = 0; i < WIL6210_MAX_CID; i++)
 394                 spin_lock_init(&wil->sta[i].tid_rx_lock);
 395
 396         mutex_init(&wil->mutex);
 397         mutex_init(&wil->wmi_mutex);
 398         mutex_init(&wil->back_rx_mutex);
 399         mutex_init(&wil->back_tx_mutex);
 400
 401         init_completion(&wil->wmi_ready);
 402         init_completion(&wil->wmi_call);
 403
 404         wil->pending_connect_cid = -1;
 405         setup_timer(&wil->connect_timer, wil_connect_timer_fn, (ulong)wil);
 406         setup_timer(&wil->scan_timer, wil_scan_timer_fn, (ulong)wil);
 407
 408         INIT_WORK(&wil->connect_worker, wil_connect_worker);
 409         INIT_WORK(&wil->disconnect_worker, wil_disconnect_worker);
 410         INIT_WORK(&wil->wmi_event_worker, wmi_event_worker);
 411         INIT_WORK(&wil->fw_error_worker, wil_fw_error_worker);
 412         INIT_WORK(&wil->back_rx_worker, wil_back_rx_worker);
 413         INIT_WORK(&wil->back_tx_worker, wil_back_tx_worker);
 414
 415         INIT_LIST_HEAD(&wil->pending_wmi_ev);
 416         INIT_LIST_HEAD(&wil->back_rx_pending);
 417         INIT_LIST_HEAD(&wil->back_tx_pending);
 418         spin_lock_init(&wil->wmi_ev_lock);
 419         init_waitqueue_head(&wil->wq);
 420
 421         wil->wmi_wq = create_singlethread_workqueue(WIL_NAME "_wmi");
 422         if (!wil->wmi_wq)
 423                 return -EAGAIN;
 424
 425         wil->wq_service = create_singlethread_workqueue(WIL_NAME "_service");
 426         if (!wil->wq_service)
 427                 goto out_wmi_wq;
 428
 429         wil->last_fw_recovery = jiffies;
 430         wil->itr_trsh = itr_trsh;
 431
 432         return 0;
 433
 434 out_wmi_wq:
 435         destroy_workqueue(wil->wmi_wq);
 436
 437         return -EAGAIN;
 438 }
 439
 440 /**
 441  * wil6210_disconnect - disconnect one connection
 442  * @wil: driver context
 443  * @bssid: peer to disconnect, NULL to disconnect all
 444  * @reason_code: Reason code for the Disassociation frame
 445  * @from_event: whether is invoked from FW event handler
 446  *
 447  * Disconnect and release associated resources. If invoked not from the
 448  * FW event handler, issue WMI command(s) to trigger MAC disconnect.
 449  */
 450 void wil6210_disconnect(struct wil6210_priv *wil, const u8 *bssid,
 451                         u16 reason_code, bool from_event)
 452 {
 453         wil_dbg_misc(wil, "%s()\n", __func__);
 454
 455         del_timer_sync(&wil->connect_timer);
 456         _wil6210_disconnect(wil, bssid, reason_code, from_event);
 457 }
 458
 459 void wil_priv_deinit(struct wil6210_priv *wil)
 460 {
 461         wil_dbg_misc(wil, "%s()\n", __func__);
 462
 463         wil_set_recovery_state(wil, fw_recovery_idle);
 464         del_timer_sync(&wil->scan_timer);
 465         cancel_work_sync(&wil->disconnect_worker);
 466         cancel_work_sync(&wil->fw_error_worker);
 467         mutex_lock(&wil->mutex);
 468         wil6210_disconnect(wil, NULL, WLAN_REASON_DEAUTH_LEAVING, false);
 469         mutex_unlock(&wil->mutex);
 470         wmi_event_flush(wil);
 471         wil_back_rx_flush(wil);
 472         cancel_work_sync(&wil->back_rx_worker);
 473         wil_back_tx_flush(wil);
 474         cancel_work_sync(&wil->back_tx_worker);
 475         destroy_workqueue(wil->wq_service);
 476         destroy_workqueue(wil->wmi_wq);
 477 }
 478
 479 /* target operations */
 480 /* register read */
 481 #define R(a) ioread32(wil->csr + HOSTADDR(a))
 482 /* register write. wmb() to make sure it is completed */
 483 #define W(a, v) do { iowrite32(v, wil->csr + HOSTADDR(a)); wmb(); } while (0)
 484 /* register set = read, OR, write */
 485 #define S(a, v) W(a, R(a) | v)
 486 /* register clear = read, AND with inverted, write */
 487 #define C(a, v) W(a, R(a) & ~v)
 488
 489 static inline void wil_halt_cpu(struct wil6210_priv *wil)
 490 {
 491         W(RGF_USER_USER_CPU_0, BIT_USER_USER_CPU_MAN_RST);
 492         W(RGF_USER_MAC_CPU_0,  BIT_USER_MAC_CPU_MAN_RST);
 493 }
 494
 495 static inline void wil_release_cpu(struct wil6210_priv *wil)
 496 {
 497         /* Start CPU */
 498         W(RGF_USER_USER_CPU_0, 1);
 499 }
 500
 501 static int wil_target_reset(struct wil6210_priv *wil)
 502 {
 503         int delay = 0;
 504         u32 x;
 505         bool is_reset_v2 = test_bit(hw_capability_reset_v2,
 506                                     wil->hw_capabilities);
 507
 508         wil_dbg_misc(wil, "Resetting \"%s\"...\n", wil->hw_name);
 509
 510         /* Clear MAC link up */
 511         S(RGF_HP_CTRL, BIT(15));
 512         S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT_HPAL_PERST_FROM_PAD);
 513         S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT_CAR_PERST_RST);
 514
 515         wil_halt_cpu(wil);
 516
 517         /* Clear Fw Download notification */
 518         C(RGF_USER_USAGE_6, BIT(0));
 519
 520         if (is_reset_v2) {
 521                 S(RGF_CAF_OSC_CONTROL, BIT_CAF_OSC_XTAL_EN);
 522                 /* XTAL stabilization should take about 3ms */
 523                 usleep_range(5000, 7000);
 524                 x = R(RGF_CAF_PLL_LOCK_STATUS);
 525                 if (!(x & BIT_CAF_OSC_DIG_XTAL_STABLE)) {
 526                         wil_err(wil, "Xtal stabilization timeout\n"
 527                                 "RGF_CAF_PLL_LOCK_STATUS = 0x%08x\n", x);
 528                         return -ETIME;
 529                 }
 530                 /* switch 10k to XTAL*/
 531                 C(RGF_USER_SPARROW_M_4, BIT_SPARROW_M_4_SEL_SLEEP_OR_REF);
 532                 /* 40 MHz */
 533                 C(RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_CAR_AHB_SW_SEL);
 534
 535                 W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x3ff81f);
 536                 W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_1, 0xf);
 537         }
 538
 539         W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0xFE000000);
 540         W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0x0000003F);
 541         W(RGF_USER_CLKS_CTL_SW_RST_VEC_3,
 542           is_reset_v2 ? 0x000000f0 : 0x00000170);
 543         W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0xFFE7FE00);
 544
 545         if (is_reset_v2) {
 546                 W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x0);
 547                 W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_1, 0x0);
 548         }
 549
 550         W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0);
 551         W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0);
 552         W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0);
 553         W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
 554
 555         if (is_reset_v2) {
 556                 W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000003);
 557                 /* reset A2 PCIE AHB */
 558                 W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00008000);
 559         } else {
 560                 W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000001);
 561                 W(RGF_PCIE_LOS_COUNTER_CTL, BIT(6) | BIT(8));
 562                 W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00008000);
 563         }
 564
 565         /* TODO: check order here!!! Erez code is different */
 566         W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
 567
 568         /* wait until device ready. typical time is 200..250 msec */
 569         do {
 570                 msleep(RST_DELAY);
 571                 x = R(RGF_USER_HW_MACHINE_STATE);
 572                 if (delay++ > RST_COUNT) {
 573                         wil_err(wil, "Reset not completed, hw_state 0x%08x\n",
 574                                 x);
 575                         return -ETIME;
 576                 }
 577         } while (x != HW_MACHINE_BOOT_DONE);
 578
 579         if (!is_reset_v2)
 580                 W(RGF_PCIE_LOS_COUNTER_CTL, BIT(8));
 581
 582         C(RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_RST_PWGD);
 583
 584         wil_dbg_misc(wil, "Reset completed in %d ms\n", delay * RST_DELAY);
 585         return 0;
 586 }
 587
 588 /**
 589  * wil_set_itr_trsh: - apply interrupt coalescing params
 590  */
 591 void wil_set_itr_trsh(struct wil6210_priv *wil)
 592 {
 593         /* disable, use usec resolution */
 594         W(RGF_DMA_ITR_CNT_CRL, BIT_DMA_ITR_CNT_CRL_EXT_TICK);
 595
 596         /* disable interrupt moderation for monitor
 597          * to get better timestamp precision
 598          */
 599         if (wil->wdev->iftype == NL80211_IFTYPE_MONITOR)
 600                 return;
 601
 602         wil_info(wil, "set ITR_TRSH = %d usec\n", wil->itr_trsh);
 603         W(RGF_DMA_ITR_CNT_TRSH, wil->itr_trsh);
 604         W(RGF_DMA_ITR_CNT_CRL, BIT_DMA_ITR_CNT_CRL_EN |
 605           BIT_DMA_ITR_CNT_CRL_EXT_TICK); /* start it */
 606 }
 607
 608 #undef R
 609 #undef W
 610 #undef S
 611 #undef C
 612
 613 void wil_mbox_ring_le2cpus(struct wil6210_mbox_ring *r)
 614 {
 615         le32_to_cpus(&r->base);
 616         le16_to_cpus(&r->entry_size);
 617         le16_to_cpus(&r->size);
 618         le32_to_cpus(&r->tail);
 619         le32_to_cpus(&r->head);
 620 }
 621
 622 static int wil_wait_for_fw_ready(struct wil6210_priv *wil)
 623 {
 624         ulong to = msecs_to_jiffies(1000);
 625         ulong left = wait_for_completion_timeout(&wil->wmi_ready, to);
 626
 627         if (0 == left) {
 628                 wil_err(wil, "Firmware not ready\n");
 629                 return -ETIME;
 630         } else {
 631                 wil_info(wil, "FW ready after %d ms. HW version 0x%08x\n",
 632                          jiffies_to_msecs(to-left), wil->hw_version);
 633         }
 634         return 0;
 635 }
 636
 637 /*
 638  * We reset all the structures, and we reset the UMAC.
 639  * After calling this routine, you're expected to reload
 640  * the firmware.
 641  */
 642 int wil_reset(struct wil6210_priv *wil)
 643 {
 644         int rc;
 645
 646         wil_dbg_misc(wil, "%s()\n", __func__);
 647
 648         if (wil->hw_version == HW_VER_UNKNOWN)
 649                 return -ENODEV;
 650
 651         WARN_ON(!mutex_is_locked(&wil->mutex));
 652         WARN_ON(test_bit(wil_status_napi_en, wil->status));
 653
 654         cancel_work_sync(&wil->disconnect_worker);
 655         wil6210_disconnect(wil, NULL, WLAN_REASON_DEAUTH_LEAVING, false);
 656
 657         /* prevent NAPI from being scheduled */
 658         bitmap_zero(wil->status, wil_status_last);
 659
 660         if (wil->scan_request) {
 661                 wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
 662                              wil->scan_request);
 663                 del_timer_sync(&wil->scan_timer);
 664                 cfg80211_scan_done(wil->scan_request, true);
 665                 wil->scan_request = NULL;
 666         }
 667
 668         wil_mask_irq(wil);
 669
 670         wmi_event_flush(wil);
 671
 672         flush_workqueue(wil->wq_service);
 673         flush_workqueue(wil->wmi_wq);
 674
 675         rc = wil_target_reset(wil);
 676         wil_rx_fini(wil);
 677         if (rc)
 678                 return rc;
 679
 680         if (!no_fw_load) {
 681                 wil_info(wil, "Use firmware <%s>\n", WIL_FW_NAME);
 682                 wil_halt_cpu(wil);
 683                 /* Loading f/w from the file */
 684                 rc = wil_request_firmware(wil, WIL_FW_NAME);
 685                 if (rc)
 686                         return rc;
 687
 688                 /* clear any interrupts which on-card-firmware may have set */
 689                 wil6210_clear_irq(wil);
 690                 { /* CAF_ICR - clear and mask */
 691                         u32 a = HOSTADDR(RGF_CAF_ICR) +
 692                                 offsetof(struct RGF_ICR, ICR);
 693                         u32 m = HOSTADDR(RGF_CAF_ICR) +
 694                                 offsetof(struct RGF_ICR, IMV);
 695                         u32 icr = ioread32(wil->csr + a);
 696
 697                         iowrite32(icr, wil->csr + a); /* W1C */
 698                         iowrite32(~0, wil->csr + m);
 699                         wmb(); /* wait for completion */
 700                 }
 701                 wil_release_cpu(wil);
 702         } else {
 703                 wil_info(wil, "Use firmware from on-card flash\n");
 704         }
 705
 706         /* init after reset */
 707         wil->pending_connect_cid = -1;
 708         reinit_completion(&wil->wmi_ready);
 709         reinit_completion(&wil->wmi_call);
 710
 711         wil_unmask_irq(wil);
 712
 713         /* we just started MAC, wait for FW ready */
 714         rc = wil_wait_for_fw_ready(wil);
 715
 716         return rc;
 717 }
 718
 719 void wil_fw_error_recovery(struct wil6210_priv *wil)
 720 {
 721         wil_dbg_misc(wil, "starting fw error recovery\n");
 722         wil->recovery_state = fw_recovery_pending;
 723         schedule_work(&wil->fw_error_worker);
 724 }
 725
 726 void wil_link_on(struct wil6210_priv *wil)
 727 {
 728         struct net_device *ndev = wil_to_ndev(wil);
 729
 730         wil_dbg_misc(wil, "%s()\n", __func__);
 731
 732         netif_carrier_on(ndev);
 733         wil_dbg_misc(wil, "netif_tx_wake : link on\n");
 734         netif_tx_wake_all_queues(ndev);
 735 }
 736
 737 void wil_link_off(struct wil6210_priv *wil)
 738 {
 739         struct net_device *ndev = wil_to_ndev(wil);
 740
 741         wil_dbg_misc(wil, "%s()\n", __func__);
 742
 743         netif_tx_stop_all_queues(ndev);
 744         wil_dbg_misc(wil, "netif_tx_stop : link off\n");
 745         netif_carrier_off(ndev);
 746 }
 747
 748 int __wil_up(struct wil6210_priv *wil)
 749 {
 750         struct net_device *ndev = wil_to_ndev(wil);
 751         struct wireless_dev *wdev = wil->wdev;
 752         int rc;
 753
 754         WARN_ON(!mutex_is_locked(&wil->mutex));
 755
 756         rc = wil_reset(wil);
 757         if (rc)
 758                 return rc;
 759
 760         /* Rx VRING. After MAC and beacon */
 761         rc = wil_rx_init(wil, 1 << rx_ring_order);
 762         if (rc)
 763                 return rc;
 764
 765         switch (wdev->iftype) {
 766         case NL80211_IFTYPE_STATION:
 767                 wil_dbg_misc(wil, "type: STATION\n");
 768                 ndev->type = ARPHRD_ETHER;
 769                 break;
 770         case NL80211_IFTYPE_AP:
 771                 wil_dbg_misc(wil, "type: AP\n");
 772                 ndev->type = ARPHRD_ETHER;
 773                 break;
 774         case NL80211_IFTYPE_P2P_CLIENT:
 775                 wil_dbg_misc(wil, "type: P2P_CLIENT\n");
 776                 ndev->type = ARPHRD_ETHER;
 777                 break;
 778         case NL80211_IFTYPE_P2P_GO:
 779                 wil_dbg_misc(wil, "type: P2P_GO\n");
 780                 ndev->type = ARPHRD_ETHER;
 781                 break;
 782         case NL80211_IFTYPE_MONITOR:
 783                 wil_dbg_misc(wil, "type: Monitor\n");
 784                 ndev->type = ARPHRD_IEEE80211_RADIOTAP;
 785                 /* ARPHRD_IEEE80211 or ARPHRD_IEEE80211_RADIOTAP ? */
 786                 break;
 787         default:
 788                 return -EOPNOTSUPP;
 789         }
 790
 791         /* MAC address - pre-requisite for other commands */
 792         wmi_set_mac_address(wil, ndev->dev_addr);
 793
 794         wil_dbg_misc(wil, "NAPI enable\n");
 795         napi_enable(&wil->napi_rx);
 796         napi_enable(&wil->napi_tx);
 797         set_bit(wil_status_napi_en, wil->status);
 798
 799         if (wil->platform_ops.bus_request)
 800                 wil->platform_ops.bus_request(wil->platform_handle,
 801                                               WIL_MAX_BUS_REQUEST_KBPS);
 802
 803         return 0;
 804 }
 805
 806 int wil_up(struct wil6210_priv *wil)
 807 {
 808         int rc;
 809
 810         wil_dbg_misc(wil, "%s()\n", __func__);
 811
 812         mutex_lock(&wil->mutex);
 813         rc = __wil_up(wil);
 814         mutex_unlock(&wil->mutex);
 815
 816         return rc;
 817 }
 818
 819 int __wil_down(struct wil6210_priv *wil)
 820 {
 821         int iter = WAIT_FOR_DISCONNECT_TIMEOUT_MS /
 822                         WAIT_FOR_DISCONNECT_INTERVAL_MS;
 823
 824         WARN_ON(!mutex_is_locked(&wil->mutex));
 825
 826         if (wil->platform_ops.bus_request)
 827                 wil->platform_ops.bus_request(wil->platform_handle, 0);
 828
 829         wil_disable_irq(wil);
 830         if (test_and_clear_bit(wil_status_napi_en, wil->status)) {
 831                 napi_disable(&wil->napi_rx);
 832                 napi_disable(&wil->napi_tx);
 833                 wil_dbg_misc(wil, "NAPI disable\n");
 834         }
 835         wil_enable_irq(wil);
 836
 837         if (wil->scan_request) {
 838                 wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
 839                              wil->scan_request);
 840                 del_timer_sync(&wil->scan_timer);
 841                 cfg80211_scan_done(wil->scan_request, true);
 842                 wil->scan_request = NULL;
 843         }
 844
 845         if (test_bit(wil_status_fwconnected, wil->status) ||
 846             test_bit(wil_status_fwconnecting, wil->status))
 847                 wmi_send(wil, WMI_DISCONNECT_CMDID, NULL, 0);
 848
 849         /* make sure wil is idle (not connected) */
 850         mutex_unlock(&wil->mutex);
 851         while (iter--) {
 852                 int idle = !test_bit(wil_status_fwconnected, wil->status) &&
 853                            !test_bit(wil_status_fwconnecting, wil->status);
 854                 if (idle)
 855                         break;
 856                 msleep(WAIT_FOR_DISCONNECT_INTERVAL_MS);
 857         }
 858         mutex_lock(&wil->mutex);
 859
 860         if (!iter)
 861                 wil_err(wil, "timeout waiting for idle FW/HW\n");
 862
 863         wil_rx_fini(wil);
 864
 865         return 0;
 866 }
 867
 868 int wil_down(struct wil6210_priv *wil)
 869 {
 870         int rc;
 871
 872         wil_dbg_misc(wil, "%s()\n", __func__);
 873
 874         wil_set_recovery_state(wil, fw_recovery_idle);
 875         mutex_lock(&wil->mutex);
 876         rc = __wil_down(wil);
 877         mutex_unlock(&wil->mutex);
 878
 879         return rc;
 880 }
 881
 882 int wil_find_cid(struct wil6210_priv *wil, const u8 *mac)
 883 {
 884         int i;
 885         int rc = -ENOENT;
 886
 887         for (i = 0; i < ARRAY_SIZE(wil->sta); i++) {
 888                 if ((wil->sta[i].status != wil_sta_unused) &&
 889                     ether_addr_equal(wil->sta[i].addr, mac)) {
 890                         rc = i;
 891                         break;
 892                 }
 893         }
 894
 895         return rc;
 896 }