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 #define RST_DELAY (20) /* msec, for loop in @wil_target_reset */
  42 #define RST_COUNT (1 + 1000/RST_DELAY) /* round up to be above 1 sec total */
  43
  44 /*
  45  * Due to a hardware issue,
  46  * one has to read/write to/from NIC in 32-bit chunks;
  47  * regular memcpy_fromio and siblings will
  48  * not work on 64-bit platform - it uses 64-bit transactions
  49  *
  50  * Force 32-bit transactions to enable NIC on 64-bit platforms
  51  *
  52  * To avoid byte swap on big endian host, __raw_{read|write}l
  53  * should be used - {read|write}l would swap bytes to provide
  54  * little endian on PCI value in host endianness.
  55  */
  56 void wil_memcpy_fromio_32(void *dst, const volatile void __iomem *src,
  57                           size_t count)
  58 {
  59         u32 *d = dst;
  60         const volatile u32 __iomem *s = src;
  61
  62         /* size_t is unsigned, if (count%4 != 0) it will wrap */
  63         for (count += 4; count > 4; count -= 4)
  64                 *d++ = __raw_readl(s++);
  65 }
  66
  67 void wil_memcpy_toio_32(volatile void __iomem *dst, const void *src,
  68                         size_t count)
  69 {
  70         volatile u32 __iomem *d = dst;
  71         const u32 *s = src;
  72
  73         for (count += 4; count > 4; count -= 4)
  74                 __raw_writel(*s++, d++);
  75 }
  76
  77 static void wil_disconnect_cid(struct wil6210_priv *wil, int cid,
  78                                bool from_event)
  79 {
  80         uint i;
  81         struct net_device *ndev = wil_to_ndev(wil);
  82         struct wireless_dev *wdev = wil->wdev;
  83         struct wil_sta_info *sta = &wil->sta[cid];
  84
  85         wil_dbg_misc(wil, "%s(CID %d, status %d)\n", __func__, cid,
  86                      sta->status);
  87
  88         sta->data_port_open = false;
  89         if (sta->status != wil_sta_unused) {
  90                 if (!from_event)
  91                         wmi_disconnect_sta(wil, sta->addr,
  92                                            WLAN_REASON_DEAUTH_LEAVING);
  93
  94                 switch (wdev->iftype) {
  95                 case NL80211_IFTYPE_AP:
  96                 case NL80211_IFTYPE_P2P_GO:
  97                         /* AP-like interface */
  98                         cfg80211_del_sta(ndev, sta->addr, GFP_KERNEL);
  99                         break;
 100                 default:
 101                         break;
 102                 }
 103                 sta->status = wil_sta_unused;
 104         }
 105
 106         for (i = 0; i < WIL_STA_TID_NUM; i++) {
 107                 struct wil_tid_ampdu_rx *r;
 108                 unsigned long flags;
 109
 110                 spin_lock_irqsave(&sta->tid_rx_lock, flags);
 111
 112                 r = sta->tid_rx[i];
 113                 sta->tid_rx[i] = NULL;
 114                 wil_tid_ampdu_rx_free(wil, r);
 115
 116                 spin_unlock_irqrestore(&sta->tid_rx_lock, flags);
 117         }
 118         for (i = 0; i < ARRAY_SIZE(wil->vring_tx); i++) {
 119                 if (wil->vring2cid_tid[i][0] == cid)
 120                         wil_vring_fini_tx(wil, i);
 121         }
 122         memset(&sta->stats, 0, sizeof(sta->stats));
 123 }
 124
 125 static void _wil6210_disconnect(struct wil6210_priv *wil, const u8 *bssid,
 126                                 bool from_event)
 127 {
 128         int cid = -ENOENT;
 129         struct net_device *ndev = wil_to_ndev(wil);
 130         struct wireless_dev *wdev = wil->wdev;
 131
 132         might_sleep();
 133         if (bssid) {
 134                 cid = wil_find_cid(wil, bssid);
 135                 wil_dbg_misc(wil, "%s(%pM, CID %d)\n", __func__, bssid, cid);
 136         } else {
 137                 wil_dbg_misc(wil, "%s(all)\n", __func__);
 138         }
 139
 140         if (cid >= 0) /* disconnect 1 peer */
 141                 wil_disconnect_cid(wil, cid, from_event);
 142         else /* disconnect all */
 143                 for (cid = 0; cid < WIL6210_MAX_CID; cid++)
 144                         wil_disconnect_cid(wil, cid, from_event);
 145
 146         /* link state */
 147         switch (wdev->iftype) {
 148         case NL80211_IFTYPE_STATION:
 149         case NL80211_IFTYPE_P2P_CLIENT:
 150                 wil_link_off(wil);
 151                 if (test_bit(wil_status_fwconnected, &wil->status)) {
 152                         clear_bit(wil_status_fwconnected, &wil->status);
 153                         cfg80211_disconnected(ndev,
 154                                               WLAN_STATUS_UNSPECIFIED_FAILURE,
 155                                               NULL, 0, GFP_KERNEL);
 156                 } else if (test_bit(wil_status_fwconnecting, &wil->status)) {
 157                         cfg80211_connect_result(ndev, bssid, NULL, 0, NULL, 0,
 158                                                 WLAN_STATUS_UNSPECIFIED_FAILURE,
 159                                                 GFP_KERNEL);
 160                 }
 161                 clear_bit(wil_status_fwconnecting, &wil->status);
 162                 break;
 163         default:
 164                 break;
 165         }
 166 }
 167
 168 static void wil_disconnect_worker(struct work_struct *work)
 169 {
 170         struct wil6210_priv *wil = container_of(work,
 171                         struct wil6210_priv, disconnect_worker);
 172
 173         mutex_lock(&wil->mutex);
 174         _wil6210_disconnect(wil, NULL, false);
 175         mutex_unlock(&wil->mutex);
 176 }
 177
 178 static void wil_connect_timer_fn(ulong x)
 179 {
 180         struct wil6210_priv *wil = (void *)x;
 181
 182         wil_dbg_misc(wil, "Connect timeout\n");
 183
 184         /* reschedule to thread context - disconnect won't
 185          * run from atomic context
 186          */
 187         schedule_work(&wil->disconnect_worker);
 188 }
 189
 190 static void wil_scan_timer_fn(ulong x)
 191 {
 192         struct wil6210_priv *wil = (void *)x;
 193
 194         clear_bit(wil_status_fwready, &wil->status);
 195         wil_err(wil, "Scan timeout detected, start fw error recovery\n");
 196         schedule_work(&wil->fw_error_worker);
 197 }
 198
 199 static int wil_wait_for_recovery(struct wil6210_priv *wil)
 200 {
 201         if (wait_event_interruptible(wil->wq, wil->recovery_state !=
 202                                      fw_recovery_pending)) {
 203                 wil_err(wil, "Interrupt, canceling recovery\n");
 204                 return -ERESTARTSYS;
 205         }
 206         if (wil->recovery_state != fw_recovery_running) {
 207                 wil_info(wil, "Recovery cancelled\n");
 208                 return -EINTR;
 209         }
 210         wil_info(wil, "Proceed with recovery\n");
 211         return 0;
 212 }
 213
 214 void wil_set_recovery_state(struct wil6210_priv *wil, int state)
 215 {
 216         wil_dbg_misc(wil, "%s(%d -> %d)\n", __func__,
 217                      wil->recovery_state, state);
 218
 219         wil->recovery_state = state;
 220         wake_up_interruptible(&wil->wq);
 221 }
 222
 223 static void wil_fw_error_worker(struct work_struct *work)
 224 {
 225         struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
 226                                                 fw_error_worker);
 227         struct wireless_dev *wdev = wil->wdev;
 228
 229         wil_dbg_misc(wil, "fw error worker\n");
 230
 231         if (!netif_running(wil_to_ndev(wil))) {
 232                 wil_info(wil, "No recovery - interface is down\n");
 233                 return;
 234         }
 235
 236         /* increment @recovery_count if less then WIL6210_FW_RECOVERY_TO
 237          * passed since last recovery attempt
 238          */
 239         if (time_is_after_jiffies(wil->last_fw_recovery +
 240                                   WIL6210_FW_RECOVERY_TO))
 241                 wil->recovery_count++;
 242         else
 243                 wil->recovery_count = 1; /* fw was alive for a long time */
 244
 245         if (wil->recovery_count > WIL6210_FW_RECOVERY_RETRIES) {
 246                 wil_err(wil, "too many recovery attempts (%d), giving up\n",
 247                         wil->recovery_count);
 248                 return;
 249         }
 250
 251         wil->last_fw_recovery = jiffies;
 252
 253         mutex_lock(&wil->mutex);
 254         switch (wdev->iftype) {
 255         case NL80211_IFTYPE_STATION:
 256         case NL80211_IFTYPE_P2P_CLIENT:
 257         case NL80211_IFTYPE_MONITOR:
 258                 wil_info(wil, "fw error recovery requested (try %d)...\n",
 259                          wil->recovery_count);
 260                 if (!no_fw_recovery)
 261                         wil->recovery_state = fw_recovery_running;
 262                 if (0 != wil_wait_for_recovery(wil))
 263                         break;
 264
 265                 __wil_down(wil);
 266                 __wil_up(wil);
 267                 break;
 268         case NL80211_IFTYPE_AP:
 269         case NL80211_IFTYPE_P2P_GO:
 270                 wil_info(wil, "No recovery for AP-like interface\n");
 271                 /* recovery in these modes is done by upper layers */
 272                 break;
 273         default:
 274                 wil_err(wil, "No recovery - unknown interface type %d\n",
 275                         wdev->iftype);
 276                 break;
 277         }
 278         mutex_unlock(&wil->mutex);
 279 }
 280
 281 static int wil_find_free_vring(struct wil6210_priv *wil)
 282 {
 283         int i;
 284
 285         for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
 286                 if (!wil->vring_tx[i].va)
 287                         return i;
 288         }
 289         return -EINVAL;
 290 }
 291
 292 static void wil_connect_worker(struct work_struct *work)
 293 {
 294         int rc;
 295         struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
 296                                                 connect_worker);
 297         int cid = wil->pending_connect_cid;
 298         int ringid = wil_find_free_vring(wil);
 299
 300         if (cid < 0) {
 301                 wil_err(wil, "No connection pending\n");
 302                 return;
 303         }
 304
 305         wil_dbg_wmi(wil, "Configure for connection CID %d\n", cid);
 306
 307         rc = wil_vring_init_tx(wil, ringid, WIL6210_TX_RING_SIZE, cid, 0);
 308         wil->pending_connect_cid = -1;
 309         if (rc == 0) {
 310                 wil->sta[cid].status = wil_sta_connected;
 311                 wil_link_on(wil);
 312         } else {
 313                 wil->sta[cid].status = wil_sta_unused;
 314         }
 315 }
 316
 317 int wil_priv_init(struct wil6210_priv *wil)
 318 {
 319         uint i;
 320
 321         wil_dbg_misc(wil, "%s()\n", __func__);
 322
 323         memset(wil->sta, 0, sizeof(wil->sta));
 324         for (i = 0; i < WIL6210_MAX_CID; i++)
 325                 spin_lock_init(&wil->sta[i].tid_rx_lock);
 326
 327         mutex_init(&wil->mutex);
 328         mutex_init(&wil->wmi_mutex);
 329
 330         init_completion(&wil->wmi_ready);
 331         init_completion(&wil->wmi_call);
 332
 333         wil->pending_connect_cid = -1;
 334         setup_timer(&wil->connect_timer, wil_connect_timer_fn, (ulong)wil);
 335         setup_timer(&wil->scan_timer, wil_scan_timer_fn, (ulong)wil);
 336
 337         INIT_WORK(&wil->connect_worker, wil_connect_worker);
 338         INIT_WORK(&wil->disconnect_worker, wil_disconnect_worker);
 339         INIT_WORK(&wil->wmi_event_worker, wmi_event_worker);
 340         INIT_WORK(&wil->fw_error_worker, wil_fw_error_worker);
 341
 342         INIT_LIST_HEAD(&wil->pending_wmi_ev);
 343         spin_lock_init(&wil->wmi_ev_lock);
 344         init_waitqueue_head(&wil->wq);
 345
 346         wil->wmi_wq = create_singlethread_workqueue(WIL_NAME"_wmi");
 347         if (!wil->wmi_wq)
 348                 return -EAGAIN;
 349
 350         wil->wmi_wq_conn = create_singlethread_workqueue(WIL_NAME"_connect");
 351         if (!wil->wmi_wq_conn) {
 352                 destroy_workqueue(wil->wmi_wq);
 353                 return -EAGAIN;
 354         }
 355
 356         wil->last_fw_recovery = jiffies;
 357         wil->itr_trsh = itr_trsh;
 358
 359         return 0;
 360 }
 361
 362 /**
 363  * wil6210_disconnect - disconnect one connection
 364  * @wil: driver context
 365  * @bssid: peer to disconnect, NULL to disconnect all
 366  * @from_event: whether is invoked from FW event handler
 367  *
 368  * Disconnect and release associated resources. If invoked not from the
 369  * FW event handler, issue WMI command(s) to trigger MAC disconnect.
 370  */
 371 void wil6210_disconnect(struct wil6210_priv *wil, const u8 *bssid,
 372                         bool from_event)
 373 {
 374         wil_dbg_misc(wil, "%s()\n", __func__);
 375
 376         del_timer_sync(&wil->connect_timer);
 377         _wil6210_disconnect(wil, bssid, from_event);
 378 }
 379
 380 void wil_priv_deinit(struct wil6210_priv *wil)
 381 {
 382         wil_dbg_misc(wil, "%s()\n", __func__);
 383
 384         wil_set_recovery_state(wil, fw_recovery_idle);
 385         del_timer_sync(&wil->scan_timer);
 386         cancel_work_sync(&wil->disconnect_worker);
 387         cancel_work_sync(&wil->fw_error_worker);
 388         mutex_lock(&wil->mutex);
 389         wil6210_disconnect(wil, NULL, false);
 390         mutex_unlock(&wil->mutex);
 391         wmi_event_flush(wil);
 392         destroy_workqueue(wil->wmi_wq_conn);
 393         destroy_workqueue(wil->wmi_wq);
 394 }
 395
 396 /* target operations */
 397 /* register read */
 398 #define R(a) ioread32(wil->csr + HOSTADDR(a))
 399 /* register write. wmb() to make sure it is completed */
 400 #define W(a, v) do { iowrite32(v, wil->csr + HOSTADDR(a)); wmb(); } while (0)
 401 /* register set = read, OR, write */
 402 #define S(a, v) W(a, R(a) | v)
 403 /* register clear = read, AND with inverted, write */
 404 #define C(a, v) W(a, R(a) & ~v)
 405
 406 static inline void wil_halt_cpu(struct wil6210_priv *wil)
 407 {
 408         W(RGF_USER_USER_CPU_0, BIT_USER_USER_CPU_MAN_RST);
 409         W(RGF_USER_MAC_CPU_0,  BIT_USER_MAC_CPU_MAN_RST);
 410 }
 411
 412 static inline void wil_release_cpu(struct wil6210_priv *wil)
 413 {
 414         /* Start CPU */
 415         W(RGF_USER_USER_CPU_0, 1);
 416 }
 417
 418 static int wil_target_reset(struct wil6210_priv *wil)
 419 {
 420         int delay = 0;
 421         u32 x;
 422         u32 rev_id;
 423         bool is_sparrow = (wil->board->board == WIL_BOARD_SPARROW);
 424
 425         wil_dbg_misc(wil, "Resetting \"%s\"...\n", wil->board->name);
 426
 427         wil->hw_version = R(RGF_USER_FW_REV_ID);
 428         rev_id = wil->hw_version & 0xff;
 429
 430         /* Clear MAC link up */
 431         S(RGF_HP_CTRL, BIT(15));
 432         S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT_HPAL_PERST_FROM_PAD);
 433         S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT_CAR_PERST_RST);
 434
 435         wil_halt_cpu(wil);
 436
 437         if (is_sparrow) {
 438                 S(RGF_CAF_OSC_CONTROL, BIT_CAF_OSC_XTAL_EN);
 439                 /* XTAL stabilization should take about 3ms */
 440                 usleep_range(5000, 7000);
 441                 x = R(RGF_CAF_PLL_LOCK_STATUS);
 442                 if (!(x & BIT_CAF_OSC_DIG_XTAL_STABLE)) {
 443                         wil_err(wil, "Xtal stabilization timeout\n"
 444                                 "RGF_CAF_PLL_LOCK_STATUS = 0x%08x\n", x);
 445                         return -ETIME;
 446                 }
 447                 /* switch 10k to XTAL*/
 448                 C(RGF_USER_SPARROW_M_4, BIT_SPARROW_M_4_SEL_SLEEP_OR_REF);
 449                 /* 40 MHz */
 450                 C(RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_CAR_AHB_SW_SEL);
 451
 452                 W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x3ff81f);
 453                 W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_1, 0xf);
 454         }
 455
 456         W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0xFE000000);
 457         W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0x0000003F);
 458         W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, is_sparrow ? 0x000000f0 : 0x00000170);
 459         W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0xFFE7FE00);
 460
 461         if (is_sparrow) {
 462                 W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x0);
 463                 W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_1, 0x0);
 464         }
 465
 466         W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0);
 467         W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0);
 468         W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0);
 469         W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
 470
 471         if (is_sparrow) {
 472                 W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000003);
 473                 /* reset A2 PCIE AHB */
 474                 W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00008000);
 475         } else {
 476                 W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000001);
 477                 if (rev_id == 1) {
 478                         /* reset A1 BOTH PCIE AHB & PCIE RGF */
 479                         W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00000080);
 480                 } else {
 481                         W(RGF_PCIE_LOS_COUNTER_CTL, BIT(6) | BIT(8));
 482                         W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00008000);
 483                 }
 484         }
 485
 486         /* TODO: check order here!!! Erez code is different */
 487         W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
 488
 489         /* wait until device ready. typical time is 200..250 msec */
 490         do {
 491                 msleep(RST_DELAY);
 492                 x = R(RGF_USER_HW_MACHINE_STATE);
 493                 if (delay++ > RST_COUNT) {
 494                         wil_err(wil, "Reset not completed, hw_state 0x%08x\n",
 495                                 x);
 496                         return -ETIME;
 497                 }
 498         } while (x != HW_MACHINE_BOOT_DONE);
 499
 500         /* TODO: Erez check rev_id != 1 */
 501         if (!is_sparrow && (rev_id != 1))
 502                 W(RGF_PCIE_LOS_COUNTER_CTL, BIT(8));
 503
 504         C(RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_RST_PWGD);
 505
 506         wil_dbg_misc(wil, "Reset completed in %d ms\n", delay * RST_DELAY);
 507         return 0;
 508 }
 509
 510 /**
 511  * wil_set_itr_trsh: - apply interrupt coalescing params
 512  */
 513 void wil_set_itr_trsh(struct wil6210_priv *wil)
 514 {
 515         /* disable, use usec resolution */
 516         W(RGF_DMA_ITR_CNT_CRL, BIT_DMA_ITR_CNT_CRL_EXT_TICK);
 517
 518         /* disable interrupt moderation for monitor
 519          * to get better timestamp precision
 520          */
 521         if (wil->wdev->iftype == NL80211_IFTYPE_MONITOR)
 522                 return;
 523
 524         wil_info(wil, "set ITR_TRSH = %d usec\n", wil->itr_trsh);
 525         W(RGF_DMA_ITR_CNT_TRSH, wil->itr_trsh);
 526         W(RGF_DMA_ITR_CNT_CRL, BIT_DMA_ITR_CNT_CRL_EN |
 527           BIT_DMA_ITR_CNT_CRL_EXT_TICK); /* start it */
 528 }
 529
 530 #undef R
 531 #undef W
 532 #undef S
 533 #undef C
 534
 535 void wil_mbox_ring_le2cpus(struct wil6210_mbox_ring *r)
 536 {
 537         le32_to_cpus(&r->base);
 538         le16_to_cpus(&r->entry_size);
 539         le16_to_cpus(&r->size);
 540         le32_to_cpus(&r->tail);
 541         le32_to_cpus(&r->head);
 542 }
 543
 544 static int wil_wait_for_fw_ready(struct wil6210_priv *wil)
 545 {
 546         ulong to = msecs_to_jiffies(1000);
 547         ulong left = wait_for_completion_timeout(&wil->wmi_ready, to);
 548
 549         if (0 == left) {
 550                 wil_err(wil, "Firmware not ready\n");
 551                 return -ETIME;
 552         } else {
 553                 wil_info(wil, "FW ready after %d ms. HW version 0x%08x\n",
 554                          jiffies_to_msecs(to-left), wil->hw_version);
 555         }
 556         return 0;
 557 }
 558
 559 /*
 560  * We reset all the structures, and we reset the UMAC.
 561  * After calling this routine, you're expected to reload
 562  * the firmware.
 563  */
 564 int wil_reset(struct wil6210_priv *wil)
 565 {
 566         int rc;
 567
 568         wil_dbg_misc(wil, "%s()\n", __func__);
 569
 570         WARN_ON(!mutex_is_locked(&wil->mutex));
 571         WARN_ON(test_bit(wil_status_napi_en, &wil->status));
 572
 573         cancel_work_sync(&wil->disconnect_worker);
 574         wil6210_disconnect(wil, NULL, false);
 575
 576         wil->status = 0; /* prevent NAPI from being scheduled */
 577
 578         if (wil->scan_request) {
 579                 wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
 580                              wil->scan_request);
 581                 del_timer_sync(&wil->scan_timer);
 582                 cfg80211_scan_done(wil->scan_request, true);
 583                 wil->scan_request = NULL;
 584         }
 585
 586         wil_mask_irq(wil);
 587
 588         wmi_event_flush(wil);
 589
 590         flush_workqueue(wil->wmi_wq_conn);
 591         flush_workqueue(wil->wmi_wq);
 592
 593         rc = wil_target_reset(wil);
 594         wil_rx_fini(wil);
 595         if (rc)
 596                 return rc;
 597
 598         if (!no_fw_load) {
 599                 wil_info(wil, "Use firmware <%s>\n", WIL_FW_NAME);
 600                 wil_halt_cpu(wil);
 601                 /* Loading f/w from the file */
 602                 rc = wil_request_firmware(wil, WIL_FW_NAME);
 603                 if (rc)
 604                         return rc;
 605
 606                 /* clear any interrupts which on-card-firmware may have set */
 607                 wil6210_clear_irq(wil);
 608                 { /* CAF_ICR - clear and mask */
 609                         u32 a = HOSTADDR(RGF_CAF_ICR) +
 610                                 offsetof(struct RGF_ICR, ICR);
 611                         u32 m = HOSTADDR(RGF_CAF_ICR) +
 612                                 offsetof(struct RGF_ICR, IMV);
 613                         u32 icr = ioread32(wil->csr + a);
 614
 615                         iowrite32(icr, wil->csr + a); /* W1C */
 616                         iowrite32(~0, wil->csr + m);
 617                         wmb(); /* wait for completion */
 618                 }
 619                 wil_release_cpu(wil);
 620         } else {
 621                 wil_info(wil, "Use firmware from on-card flash\n");
 622         }
 623
 624         /* init after reset */
 625         wil->pending_connect_cid = -1;
 626         reinit_completion(&wil->wmi_ready);
 627         reinit_completion(&wil->wmi_call);
 628
 629         wil_unmask_irq(wil);
 630
 631         /* we just started MAC, wait for FW ready */
 632         rc = wil_wait_for_fw_ready(wil);
 633
 634         return rc;
 635 }
 636
 637 void wil_fw_error_recovery(struct wil6210_priv *wil)
 638 {
 639         wil_dbg_misc(wil, "starting fw error recovery\n");
 640         wil->recovery_state = fw_recovery_pending;
 641         schedule_work(&wil->fw_error_worker);
 642 }
 643
 644 void wil_link_on(struct wil6210_priv *wil)
 645 {
 646         struct net_device *ndev = wil_to_ndev(wil);
 647
 648         wil_dbg_misc(wil, "%s()\n", __func__);
 649
 650         netif_carrier_on(ndev);
 651         wil_dbg_misc(wil, "netif_tx_wake : link on\n");
 652         netif_tx_wake_all_queues(ndev);
 653 }
 654
 655 void wil_link_off(struct wil6210_priv *wil)
 656 {
 657         struct net_device *ndev = wil_to_ndev(wil);
 658
 659         wil_dbg_misc(wil, "%s()\n", __func__);
 660
 661         netif_tx_stop_all_queues(ndev);
 662         wil_dbg_misc(wil, "netif_tx_stop : link off\n");
 663         netif_carrier_off(ndev);
 664 }
 665
 666 int __wil_up(struct wil6210_priv *wil)
 667 {
 668         struct net_device *ndev = wil_to_ndev(wil);
 669         struct wireless_dev *wdev = wil->wdev;
 670         int rc;
 671
 672         WARN_ON(!mutex_is_locked(&wil->mutex));
 673
 674         rc = wil_reset(wil);
 675         if (rc)
 676                 return rc;
 677
 678         /* Rx VRING. After MAC and beacon */
 679         rc = wil_rx_init(wil);
 680         if (rc)
 681                 return rc;
 682
 683         switch (wdev->iftype) {
 684         case NL80211_IFTYPE_STATION:
 685                 wil_dbg_misc(wil, "type: STATION\n");
 686                 ndev->type = ARPHRD_ETHER;
 687                 break;
 688         case NL80211_IFTYPE_AP:
 689                 wil_dbg_misc(wil, "type: AP\n");
 690                 ndev->type = ARPHRD_ETHER;
 691                 break;
 692         case NL80211_IFTYPE_P2P_CLIENT:
 693                 wil_dbg_misc(wil, "type: P2P_CLIENT\n");
 694                 ndev->type = ARPHRD_ETHER;
 695                 break;
 696         case NL80211_IFTYPE_P2P_GO:
 697                 wil_dbg_misc(wil, "type: P2P_GO\n");
 698                 ndev->type = ARPHRD_ETHER;
 699                 break;
 700         case NL80211_IFTYPE_MONITOR:
 701                 wil_dbg_misc(wil, "type: Monitor\n");
 702                 ndev->type = ARPHRD_IEEE80211_RADIOTAP;
 703                 /* ARPHRD_IEEE80211 or ARPHRD_IEEE80211_RADIOTAP ? */
 704                 break;
 705         default:
 706                 return -EOPNOTSUPP;
 707         }
 708
 709         /* MAC address - pre-requisite for other commands */
 710         wmi_set_mac_address(wil, ndev->dev_addr);
 711
 712         wil_dbg_misc(wil, "NAPI enable\n");
 713         napi_enable(&wil->napi_rx);
 714         napi_enable(&wil->napi_tx);
 715         set_bit(wil_status_napi_en, &wil->status);
 716
 717         if (wil->platform_ops.bus_request)
 718                 wil->platform_ops.bus_request(wil->platform_handle,
 719                                               WIL_MAX_BUS_REQUEST_KBPS);
 720
 721         return 0;
 722 }
 723
 724 int wil_up(struct wil6210_priv *wil)
 725 {
 726         int rc;
 727
 728         wil_dbg_misc(wil, "%s()\n", __func__);
 729
 730         mutex_lock(&wil->mutex);
 731         rc = __wil_up(wil);
 732         mutex_unlock(&wil->mutex);
 733
 734         return rc;
 735 }
 736
 737 int __wil_down(struct wil6210_priv *wil)
 738 {
 739         int iter = WAIT_FOR_DISCONNECT_TIMEOUT_MS /
 740                         WAIT_FOR_DISCONNECT_INTERVAL_MS;
 741
 742         WARN_ON(!mutex_is_locked(&wil->mutex));
 743
 744         if (wil->platform_ops.bus_request)
 745                 wil->platform_ops.bus_request(wil->platform_handle, 0);
 746
 747         wil_disable_irq(wil);
 748         if (test_and_clear_bit(wil_status_napi_en, &wil->status)) {
 749                 napi_disable(&wil->napi_rx);
 750                 napi_disable(&wil->napi_tx);
 751                 wil_dbg_misc(wil, "NAPI disable\n");
 752         }
 753         wil_enable_irq(wil);
 754
 755         if (wil->scan_request) {
 756                 wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
 757                              wil->scan_request);
 758                 del_timer_sync(&wil->scan_timer);
 759                 cfg80211_scan_done(wil->scan_request, true);
 760                 wil->scan_request = NULL;
 761         }
 762
 763         if (test_bit(wil_status_fwconnected, &wil->status) ||
 764             test_bit(wil_status_fwconnecting, &wil->status))
 765                 wmi_send(wil, WMI_DISCONNECT_CMDID, NULL, 0);
 766
 767         /* make sure wil is idle (not connected) */
 768         mutex_unlock(&wil->mutex);
 769         while (iter--) {
 770                 int idle = !test_bit(wil_status_fwconnected, &wil->status) &&
 771                            !test_bit(wil_status_fwconnecting, &wil->status);
 772                 if (idle)
 773                         break;
 774                 msleep(WAIT_FOR_DISCONNECT_INTERVAL_MS);
 775         }
 776         mutex_lock(&wil->mutex);
 777
 778         if (!iter)
 779                 wil_err(wil, "timeout waiting for idle FW/HW\n");
 780
 781         wil_rx_fini(wil);
 782
 783         return 0;
 784 }
 785
 786 int wil_down(struct wil6210_priv *wil)
 787 {
 788         int rc;
 789
 790         wil_dbg_misc(wil, "%s()\n", __func__);
 791
 792         wil_set_recovery_state(wil, fw_recovery_idle);
 793         mutex_lock(&wil->mutex);
 794         rc = __wil_down(wil);
 795         mutex_unlock(&wil->mutex);
 796
 797         return rc;
 798 }
 799
 800 int wil_find_cid(struct wil6210_priv *wil, const u8 *mac)
 801 {
 802         int i;
 803         int rc = -ENOENT;
 804
 805         for (i = 0; i < ARRAY_SIZE(wil->sta); i++) {
 806                 if ((wil->sta[i].status != wil_sta_unused) &&
 807                     ether_addr_equal(wil->sta[i].addr, mac)) {
 808                         rc = i;
 809                         break;
 810                 }
 811         }
 812
 813         return rc;
 814 }