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 - ETH_HLEN;
  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 > IEEE80211_MAX_DATA_LEN_DMG)
  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 #define RST_DELAY (20) /* msec, for loop in @wil_target_reset */
  71 #define RST_COUNT (1 + 1000/RST_DELAY) /* round up to be above 1 sec total */
  72
  73 /*
  74  * Due to a hardware issue,
  75  * one has to read/write to/from NIC in 32-bit chunks;
  76  * regular memcpy_fromio and siblings will
  77  * not work on 64-bit platform - it uses 64-bit transactions
  78  *
  79  * Force 32-bit transactions to enable NIC on 64-bit platforms
  80  *
  81  * To avoid byte swap on big endian host, __raw_{read|write}l
  82  * should be used - {read|write}l would swap bytes to provide
  83  * little endian on PCI value in host endianness.
  84  */
  85 void wil_memcpy_fromio_32(void *dst, const volatile void __iomem *src,
  86                           size_t count)
  87 {
  88         u32 *d = dst;
  89         const volatile u32 __iomem *s = src;
  90
  91         /* size_t is unsigned, if (count%4 != 0) it will wrap */
  92         for (count += 4; count > 4; count -= 4)
  93                 *d++ = __raw_readl(s++);
  94 }
  95
  96 void wil_memcpy_toio_32(volatile void __iomem *dst, const void *src,
  97                         size_t count)
  98 {
  99         volatile u32 __iomem *d = dst;
 100         const u32 *s = src;
 101
 102         for (count += 4; count > 4; count -= 4)
 103                 __raw_writel(*s++, d++);
 104 }
 105
 106 static void wil_disconnect_cid(struct wil6210_priv *wil, int cid,
 107                                bool from_event)
 108 {
 109         uint i;
 110         struct net_device *ndev = wil_to_ndev(wil);
 111         struct wireless_dev *wdev = wil->wdev;
 112         struct wil_sta_info *sta = &wil->sta[cid];
 113
 114         wil_dbg_misc(wil, "%s(CID %d, status %d)\n", __func__, cid,
 115                      sta->status);
 116
 117         sta->data_port_open = false;
 118         if (sta->status != wil_sta_unused) {
 119                 if (!from_event)
 120                         wmi_disconnect_sta(wil, sta->addr,
 121                                            WLAN_REASON_DEAUTH_LEAVING);
 122
 123                 switch (wdev->iftype) {
 124                 case NL80211_IFTYPE_AP:
 125                 case NL80211_IFTYPE_P2P_GO:
 126                         /* AP-like interface */
 127                         cfg80211_del_sta(ndev, sta->addr, GFP_KERNEL);
 128                         break;
 129                 default:
 130                         break;
 131                 }
 132                 sta->status = wil_sta_unused;
 133         }
 134
 135         for (i = 0; i < WIL_STA_TID_NUM; i++) {
 136                 struct wil_tid_ampdu_rx *r;
 137                 unsigned long flags;
 138
 139                 spin_lock_irqsave(&sta->tid_rx_lock, flags);
 140
 141                 r = sta->tid_rx[i];
 142                 sta->tid_rx[i] = NULL;
 143                 wil_tid_ampdu_rx_free(wil, r);
 144
 145                 spin_unlock_irqrestore(&sta->tid_rx_lock, flags);
 146         }
 147         for (i = 0; i < ARRAY_SIZE(wil->vring_tx); i++) {
 148                 if (wil->vring2cid_tid[i][0] == cid)
 149                         wil_vring_fini_tx(wil, i);
 150         }
 151         memset(&sta->stats, 0, sizeof(sta->stats));
 152 }
 153
 154 static void _wil6210_disconnect(struct wil6210_priv *wil, const u8 *bssid,
 155                                 bool from_event)
 156 {
 157         int cid = -ENOENT;
 158         struct net_device *ndev = wil_to_ndev(wil);
 159         struct wireless_dev *wdev = wil->wdev;
 160
 161         might_sleep();
 162         if (bssid) {
 163                 cid = wil_find_cid(wil, bssid);
 164                 wil_dbg_misc(wil, "%s(%pM, CID %d)\n", __func__, bssid, cid);
 165         } else {
 166                 wil_dbg_misc(wil, "%s(all)\n", __func__);
 167         }
 168
 169         if (cid >= 0) /* disconnect 1 peer */
 170                 wil_disconnect_cid(wil, cid, from_event);
 171         else /* disconnect all */
 172                 for (cid = 0; cid < WIL6210_MAX_CID; cid++)
 173                         wil_disconnect_cid(wil, cid, from_event);
 174
 175         /* link state */
 176         switch (wdev->iftype) {
 177         case NL80211_IFTYPE_STATION:
 178         case NL80211_IFTYPE_P2P_CLIENT:
 179                 wil_link_off(wil);
 180                 if (test_bit(wil_status_fwconnected, &wil->status)) {
 181                         clear_bit(wil_status_fwconnected, &wil->status);
 182                         cfg80211_disconnected(ndev,
 183                                               WLAN_STATUS_UNSPECIFIED_FAILURE,
 184                                               NULL, 0, GFP_KERNEL);
 185                 } else if (test_bit(wil_status_fwconnecting, &wil->status)) {
 186                         cfg80211_connect_result(ndev, bssid, NULL, 0, NULL, 0,
 187                                                 WLAN_STATUS_UNSPECIFIED_FAILURE,
 188                                                 GFP_KERNEL);
 189                 }
 190                 clear_bit(wil_status_fwconnecting, &wil->status);
 191                 break;
 192         default:
 193                 break;
 194         }
 195 }
 196
 197 static void wil_disconnect_worker(struct work_struct *work)
 198 {
 199         struct wil6210_priv *wil = container_of(work,
 200                         struct wil6210_priv, disconnect_worker);
 201
 202         mutex_lock(&wil->mutex);
 203         _wil6210_disconnect(wil, NULL, false);
 204         mutex_unlock(&wil->mutex);
 205 }
 206
 207 static void wil_connect_timer_fn(ulong x)
 208 {
 209         struct wil6210_priv *wil = (void *)x;
 210
 211         wil_dbg_misc(wil, "Connect timeout\n");
 212
 213         /* reschedule to thread context - disconnect won't
 214          * run from atomic context
 215          */
 216         schedule_work(&wil->disconnect_worker);
 217 }
 218
 219 static void wil_scan_timer_fn(ulong x)
 220 {
 221         struct wil6210_priv *wil = (void *)x;
 222
 223         clear_bit(wil_status_fwready, &wil->status);
 224         wil_err(wil, "Scan timeout detected, start fw error recovery\n");
 225         schedule_work(&wil->fw_error_worker);
 226 }
 227
 228 static int wil_wait_for_recovery(struct wil6210_priv *wil)
 229 {
 230         if (wait_event_interruptible(wil->wq, wil->recovery_state !=
 231                                      fw_recovery_pending)) {
 232                 wil_err(wil, "Interrupt, canceling recovery\n");
 233                 return -ERESTARTSYS;
 234         }
 235         if (wil->recovery_state != fw_recovery_running) {
 236                 wil_info(wil, "Recovery cancelled\n");
 237                 return -EINTR;
 238         }
 239         wil_info(wil, "Proceed with recovery\n");
 240         return 0;
 241 }
 242
 243 void wil_set_recovery_state(struct wil6210_priv *wil, int state)
 244 {
 245         wil_dbg_misc(wil, "%s(%d -> %d)\n", __func__,
 246                      wil->recovery_state, state);
 247
 248         wil->recovery_state = state;
 249         wake_up_interruptible(&wil->wq);
 250 }
 251
 252 static void wil_fw_error_worker(struct work_struct *work)
 253 {
 254         struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
 255                                                 fw_error_worker);
 256         struct wireless_dev *wdev = wil->wdev;
 257
 258         wil_dbg_misc(wil, "fw error worker\n");
 259
 260         if (!netif_running(wil_to_ndev(wil))) {
 261                 wil_info(wil, "No recovery - interface is down\n");
 262                 return;
 263         }
 264
 265         /* increment @recovery_count if less then WIL6210_FW_RECOVERY_TO
 266          * passed since last recovery attempt
 267          */
 268         if (time_is_after_jiffies(wil->last_fw_recovery +
 269                                   WIL6210_FW_RECOVERY_TO))
 270                 wil->recovery_count++;
 271         else
 272                 wil->recovery_count = 1; /* fw was alive for a long time */
 273
 274         if (wil->recovery_count > WIL6210_FW_RECOVERY_RETRIES) {
 275                 wil_err(wil, "too many recovery attempts (%d), giving up\n",
 276                         wil->recovery_count);
 277                 return;
 278         }
 279
 280         wil->last_fw_recovery = jiffies;
 281
 282         mutex_lock(&wil->mutex);
 283         switch (wdev->iftype) {
 284         case NL80211_IFTYPE_STATION:
 285         case NL80211_IFTYPE_P2P_CLIENT:
 286         case NL80211_IFTYPE_MONITOR:
 287                 wil_info(wil, "fw error recovery requested (try %d)...\n",
 288                          wil->recovery_count);
 289                 if (!no_fw_recovery)
 290                         wil->recovery_state = fw_recovery_running;
 291                 if (0 != wil_wait_for_recovery(wil))
 292                         break;
 293
 294                 __wil_down(wil);
 295                 __wil_up(wil);
 296                 break;
 297         case NL80211_IFTYPE_AP:
 298         case NL80211_IFTYPE_P2P_GO:
 299                 wil_info(wil, "No recovery for AP-like interface\n");
 300                 /* recovery in these modes is done by upper layers */
 301                 break;
 302         default:
 303                 wil_err(wil, "No recovery - unknown interface type %d\n",
 304                         wdev->iftype);
 305                 break;
 306         }
 307         mutex_unlock(&wil->mutex);
 308 }
 309
 310 static int wil_find_free_vring(struct wil6210_priv *wil)
 311 {
 312         int i;
 313
 314         for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
 315                 if (!wil->vring_tx[i].va)
 316                         return i;
 317         }
 318         return -EINVAL;
 319 }
 320
 321 static void wil_connect_worker(struct work_struct *work)
 322 {
 323         int rc;
 324         struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
 325                                                 connect_worker);
 326         int cid = wil->pending_connect_cid;
 327         int ringid = wil_find_free_vring(wil);
 328
 329         if (cid < 0) {
 330                 wil_err(wil, "No connection pending\n");
 331                 return;
 332         }
 333
 334         wil_dbg_wmi(wil, "Configure for connection CID %d\n", cid);
 335
 336         rc = wil_vring_init_tx(wil, ringid, WIL6210_TX_RING_SIZE, cid, 0);
 337         wil->pending_connect_cid = -1;
 338         if (rc == 0) {
 339                 wil->sta[cid].status = wil_sta_connected;
 340                 wil_link_on(wil);
 341         } else {
 342                 wil->sta[cid].status = wil_sta_unused;
 343         }
 344 }
 345
 346 int wil_priv_init(struct wil6210_priv *wil)
 347 {
 348         uint i;
 349
 350         wil_dbg_misc(wil, "%s()\n", __func__);
 351
 352         memset(wil->sta, 0, sizeof(wil->sta));
 353         for (i = 0; i < WIL6210_MAX_CID; i++)
 354                 spin_lock_init(&wil->sta[i].tid_rx_lock);
 355
 356         mutex_init(&wil->mutex);
 357         mutex_init(&wil->wmi_mutex);
 358
 359         init_completion(&wil->wmi_ready);
 360         init_completion(&wil->wmi_call);
 361
 362         wil->pending_connect_cid = -1;
 363         setup_timer(&wil->connect_timer, wil_connect_timer_fn, (ulong)wil);
 364         setup_timer(&wil->scan_timer, wil_scan_timer_fn, (ulong)wil);
 365
 366         INIT_WORK(&wil->connect_worker, wil_connect_worker);
 367         INIT_WORK(&wil->disconnect_worker, wil_disconnect_worker);
 368         INIT_WORK(&wil->wmi_event_worker, wmi_event_worker);
 369         INIT_WORK(&wil->fw_error_worker, wil_fw_error_worker);
 370
 371         INIT_LIST_HEAD(&wil->pending_wmi_ev);
 372         spin_lock_init(&wil->wmi_ev_lock);
 373         init_waitqueue_head(&wil->wq);
 374
 375         wil->wmi_wq = create_singlethread_workqueue(WIL_NAME"_wmi");
 376         if (!wil->wmi_wq)
 377                 return -EAGAIN;
 378
 379         wil->wmi_wq_conn = create_singlethread_workqueue(WIL_NAME"_connect");
 380         if (!wil->wmi_wq_conn) {
 381                 destroy_workqueue(wil->wmi_wq);
 382                 return -EAGAIN;
 383         }
 384
 385         wil->last_fw_recovery = jiffies;
 386         wil->itr_trsh = itr_trsh;
 387
 388         return 0;
 389 }
 390
 391 /**
 392  * wil6210_disconnect - disconnect one connection
 393  * @wil: driver context
 394  * @bssid: peer to disconnect, NULL to disconnect all
 395  * @from_event: whether is invoked from FW event handler
 396  *
 397  * Disconnect and release associated resources. If invoked not from the
 398  * FW event handler, issue WMI command(s) to trigger MAC disconnect.
 399  */
 400 void wil6210_disconnect(struct wil6210_priv *wil, const u8 *bssid,
 401                         bool from_event)
 402 {
 403         wil_dbg_misc(wil, "%s()\n", __func__);
 404
 405         del_timer_sync(&wil->connect_timer);
 406         _wil6210_disconnect(wil, bssid, from_event);
 407 }
 408
 409 void wil_priv_deinit(struct wil6210_priv *wil)
 410 {
 411         wil_dbg_misc(wil, "%s()\n", __func__);
 412
 413         wil_set_recovery_state(wil, fw_recovery_idle);
 414         del_timer_sync(&wil->scan_timer);
 415         cancel_work_sync(&wil->disconnect_worker);
 416         cancel_work_sync(&wil->fw_error_worker);
 417         mutex_lock(&wil->mutex);
 418         wil6210_disconnect(wil, NULL, false);
 419         mutex_unlock(&wil->mutex);
 420         wmi_event_flush(wil);
 421         destroy_workqueue(wil->wmi_wq_conn);
 422         destroy_workqueue(wil->wmi_wq);
 423 }
 424
 425 /* target operations */
 426 /* register read */
 427 #define R(a) ioread32(wil->csr + HOSTADDR(a))
 428 /* register write. wmb() to make sure it is completed */
 429 #define W(a, v) do { iowrite32(v, wil->csr + HOSTADDR(a)); wmb(); } while (0)
 430 /* register set = read, OR, write */
 431 #define S(a, v) W(a, R(a) | v)
 432 /* register clear = read, AND with inverted, write */
 433 #define C(a, v) W(a, R(a) & ~v)
 434
 435 static inline void wil_halt_cpu(struct wil6210_priv *wil)
 436 {
 437         W(RGF_USER_USER_CPU_0, BIT_USER_USER_CPU_MAN_RST);
 438         W(RGF_USER_MAC_CPU_0,  BIT_USER_MAC_CPU_MAN_RST);
 439 }
 440
 441 static inline void wil_release_cpu(struct wil6210_priv *wil)
 442 {
 443         /* Start CPU */
 444         W(RGF_USER_USER_CPU_0, 1);
 445 }
 446
 447 static int wil_target_reset(struct wil6210_priv *wil)
 448 {
 449         int delay = 0;
 450         u32 x;
 451         u32 rev_id;
 452         bool is_sparrow = (wil->board->board == WIL_BOARD_SPARROW);
 453
 454         wil_dbg_misc(wil, "Resetting \"%s\"...\n", wil->board->name);
 455
 456         wil->hw_version = R(RGF_USER_FW_REV_ID);
 457         rev_id = wil->hw_version & 0xff;
 458
 459         /* Clear MAC link up */
 460         S(RGF_HP_CTRL, BIT(15));
 461         S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT_HPAL_PERST_FROM_PAD);
 462         S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT_CAR_PERST_RST);
 463
 464         wil_halt_cpu(wil);
 465
 466         if (is_sparrow) {
 467                 S(RGF_CAF_OSC_CONTROL, BIT_CAF_OSC_XTAL_EN);
 468                 /* XTAL stabilization should take about 3ms */
 469                 usleep_range(5000, 7000);
 470                 x = R(RGF_CAF_PLL_LOCK_STATUS);
 471                 if (!(x & BIT_CAF_OSC_DIG_XTAL_STABLE)) {
 472                         wil_err(wil, "Xtal stabilization timeout\n"
 473                                 "RGF_CAF_PLL_LOCK_STATUS = 0x%08x\n", x);
 474                         return -ETIME;
 475                 }
 476                 /* switch 10k to XTAL*/
 477                 C(RGF_USER_SPARROW_M_4, BIT_SPARROW_M_4_SEL_SLEEP_OR_REF);
 478                 /* 40 MHz */
 479                 C(RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_CAR_AHB_SW_SEL);
 480
 481                 W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x3ff81f);
 482                 W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_1, 0xf);
 483         }
 484
 485         W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0xFE000000);
 486         W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0x0000003F);
 487         W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, is_sparrow ? 0x000000f0 : 0x00000170);
 488         W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0xFFE7FE00);
 489
 490         if (is_sparrow) {
 491                 W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x0);
 492                 W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_1, 0x0);
 493         }
 494
 495         W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0);
 496         W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0);
 497         W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0);
 498         W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
 499
 500         if (is_sparrow) {
 501                 W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000003);
 502                 /* reset A2 PCIE AHB */
 503                 W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00008000);
 504         } else {
 505                 W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000001);
 506                 if (rev_id == 1) {
 507                         /* reset A1 BOTH PCIE AHB & PCIE RGF */
 508                         W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00000080);
 509                 } else {
 510                         W(RGF_PCIE_LOS_COUNTER_CTL, BIT(6) | BIT(8));
 511                         W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00008000);
 512                 }
 513         }
 514
 515         /* TODO: check order here!!! Erez code is different */
 516         W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
 517
 518         /* wait until device ready. typical time is 200..250 msec */
 519         do {
 520                 msleep(RST_DELAY);
 521                 x = R(RGF_USER_HW_MACHINE_STATE);
 522                 if (delay++ > RST_COUNT) {
 523                         wil_err(wil, "Reset not completed, hw_state 0x%08x\n",
 524                                 x);
 525                         return -ETIME;
 526                 }
 527         } while (x != HW_MACHINE_BOOT_DONE);
 528
 529         /* TODO: Erez check rev_id != 1 */
 530         if (!is_sparrow && (rev_id != 1))
 531                 W(RGF_PCIE_LOS_COUNTER_CTL, BIT(8));
 532
 533         C(RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_RST_PWGD);
 534
 535         wil_dbg_misc(wil, "Reset completed in %d ms\n", delay * RST_DELAY);
 536         return 0;
 537 }
 538
 539 /**
 540  * wil_set_itr_trsh: - apply interrupt coalescing params
 541  */
 542 void wil_set_itr_trsh(struct wil6210_priv *wil)
 543 {
 544         /* disable, use usec resolution */
 545         W(RGF_DMA_ITR_CNT_CRL, BIT_DMA_ITR_CNT_CRL_EXT_TICK);
 546
 547         /* disable interrupt moderation for monitor
 548          * to get better timestamp precision
 549          */
 550         if (wil->wdev->iftype == NL80211_IFTYPE_MONITOR)
 551                 return;
 552
 553         wil_info(wil, "set ITR_TRSH = %d usec\n", wil->itr_trsh);
 554         W(RGF_DMA_ITR_CNT_TRSH, wil->itr_trsh);
 555         W(RGF_DMA_ITR_CNT_CRL, BIT_DMA_ITR_CNT_CRL_EN |
 556           BIT_DMA_ITR_CNT_CRL_EXT_TICK); /* start it */
 557 }
 558
 559 #undef R
 560 #undef W
 561 #undef S
 562 #undef C
 563
 564 void wil_mbox_ring_le2cpus(struct wil6210_mbox_ring *r)
 565 {
 566         le32_to_cpus(&r->base);
 567         le16_to_cpus(&r->entry_size);
 568         le16_to_cpus(&r->size);
 569         le32_to_cpus(&r->tail);
 570         le32_to_cpus(&r->head);
 571 }
 572
 573 static int wil_wait_for_fw_ready(struct wil6210_priv *wil)
 574 {
 575         ulong to = msecs_to_jiffies(1000);
 576         ulong left = wait_for_completion_timeout(&wil->wmi_ready, to);
 577
 578         if (0 == left) {
 579                 wil_err(wil, "Firmware not ready\n");
 580                 return -ETIME;
 581         } else {
 582                 wil_info(wil, "FW ready after %d ms. HW version 0x%08x\n",
 583                          jiffies_to_msecs(to-left), wil->hw_version);
 584         }
 585         return 0;
 586 }
 587
 588 /*
 589  * We reset all the structures, and we reset the UMAC.
 590  * After calling this routine, you're expected to reload
 591  * the firmware.
 592  */
 593 int wil_reset(struct wil6210_priv *wil)
 594 {
 595         int rc;
 596
 597         wil_dbg_misc(wil, "%s()\n", __func__);
 598
 599         WARN_ON(!mutex_is_locked(&wil->mutex));
 600         WARN_ON(test_bit(wil_status_napi_en, &wil->status));
 601
 602         cancel_work_sync(&wil->disconnect_worker);
 603         wil6210_disconnect(wil, NULL, false);
 604
 605         wil->status = 0; /* prevent NAPI from being scheduled */
 606
 607         if (wil->scan_request) {
 608                 wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
 609                              wil->scan_request);
 610                 del_timer_sync(&wil->scan_timer);
 611                 cfg80211_scan_done(wil->scan_request, true);
 612                 wil->scan_request = NULL;
 613         }
 614
 615         wil_mask_irq(wil);
 616
 617         wmi_event_flush(wil);
 618
 619         flush_workqueue(wil->wmi_wq_conn);
 620         flush_workqueue(wil->wmi_wq);
 621
 622         rc = wil_target_reset(wil);
 623         wil_rx_fini(wil);
 624         if (rc)
 625                 return rc;
 626
 627         if (!no_fw_load) {
 628                 wil_info(wil, "Use firmware <%s>\n", WIL_FW_NAME);
 629                 wil_halt_cpu(wil);
 630                 /* Loading f/w from the file */
 631                 rc = wil_request_firmware(wil, WIL_FW_NAME);
 632                 if (rc)
 633                         return rc;
 634
 635                 /* clear any interrupts which on-card-firmware may have set */
 636                 wil6210_clear_irq(wil);
 637                 { /* CAF_ICR - clear and mask */
 638                         u32 a = HOSTADDR(RGF_CAF_ICR) +
 639                                 offsetof(struct RGF_ICR, ICR);
 640                         u32 m = HOSTADDR(RGF_CAF_ICR) +
 641                                 offsetof(struct RGF_ICR, IMV);
 642                         u32 icr = ioread32(wil->csr + a);
 643
 644                         iowrite32(icr, wil->csr + a); /* W1C */
 645                         iowrite32(~0, wil->csr + m);
 646                         wmb(); /* wait for completion */
 647                 }
 648                 wil_release_cpu(wil);
 649         } else {
 650                 wil_info(wil, "Use firmware from on-card flash\n");
 651         }
 652
 653         /* init after reset */
 654         wil->pending_connect_cid = -1;
 655         reinit_completion(&wil->wmi_ready);
 656         reinit_completion(&wil->wmi_call);
 657
 658         wil_unmask_irq(wil);
 659
 660         /* we just started MAC, wait for FW ready */
 661         rc = wil_wait_for_fw_ready(wil);
 662
 663         return rc;
 664 }
 665
 666 void wil_fw_error_recovery(struct wil6210_priv *wil)
 667 {
 668         wil_dbg_misc(wil, "starting fw error recovery\n");
 669         wil->recovery_state = fw_recovery_pending;
 670         schedule_work(&wil->fw_error_worker);
 671 }
 672
 673 void wil_link_on(struct wil6210_priv *wil)
 674 {
 675         struct net_device *ndev = wil_to_ndev(wil);
 676
 677         wil_dbg_misc(wil, "%s()\n", __func__);
 678
 679         netif_carrier_on(ndev);
 680         wil_dbg_misc(wil, "netif_tx_wake : link on\n");
 681         netif_tx_wake_all_queues(ndev);
 682 }
 683
 684 void wil_link_off(struct wil6210_priv *wil)
 685 {
 686         struct net_device *ndev = wil_to_ndev(wil);
 687
 688         wil_dbg_misc(wil, "%s()\n", __func__);
 689
 690         netif_tx_stop_all_queues(ndev);
 691         wil_dbg_misc(wil, "netif_tx_stop : link off\n");
 692         netif_carrier_off(ndev);
 693 }
 694
 695 int __wil_up(struct wil6210_priv *wil)
 696 {
 697         struct net_device *ndev = wil_to_ndev(wil);
 698         struct wireless_dev *wdev = wil->wdev;
 699         int rc;
 700
 701         WARN_ON(!mutex_is_locked(&wil->mutex));
 702
 703         rc = wil_reset(wil);
 704         if (rc)
 705                 return rc;
 706
 707         /* Rx VRING. After MAC and beacon */
 708         rc = wil_rx_init(wil);
 709         if (rc)
 710                 return rc;
 711
 712         switch (wdev->iftype) {
 713         case NL80211_IFTYPE_STATION:
 714                 wil_dbg_misc(wil, "type: STATION\n");
 715                 ndev->type = ARPHRD_ETHER;
 716                 break;
 717         case NL80211_IFTYPE_AP:
 718                 wil_dbg_misc(wil, "type: AP\n");
 719                 ndev->type = ARPHRD_ETHER;
 720                 break;
 721         case NL80211_IFTYPE_P2P_CLIENT:
 722                 wil_dbg_misc(wil, "type: P2P_CLIENT\n");
 723                 ndev->type = ARPHRD_ETHER;
 724                 break;
 725         case NL80211_IFTYPE_P2P_GO:
 726                 wil_dbg_misc(wil, "type: P2P_GO\n");
 727                 ndev->type = ARPHRD_ETHER;
 728                 break;
 729         case NL80211_IFTYPE_MONITOR:
 730                 wil_dbg_misc(wil, "type: Monitor\n");
 731                 ndev->type = ARPHRD_IEEE80211_RADIOTAP;
 732                 /* ARPHRD_IEEE80211 or ARPHRD_IEEE80211_RADIOTAP ? */
 733                 break;
 734         default:
 735                 return -EOPNOTSUPP;
 736         }
 737
 738         /* MAC address - pre-requisite for other commands */
 739         wmi_set_mac_address(wil, ndev->dev_addr);
 740
 741         wil_dbg_misc(wil, "NAPI enable\n");
 742         napi_enable(&wil->napi_rx);
 743         napi_enable(&wil->napi_tx);
 744         set_bit(wil_status_napi_en, &wil->status);
 745
 746         if (wil->platform_ops.bus_request)
 747                 wil->platform_ops.bus_request(wil->platform_handle,
 748                                               WIL_MAX_BUS_REQUEST_KBPS);
 749
 750         return 0;
 751 }
 752
 753 int wil_up(struct wil6210_priv *wil)
 754 {
 755         int rc;
 756
 757         wil_dbg_misc(wil, "%s()\n", __func__);
 758
 759         mutex_lock(&wil->mutex);
 760         rc = __wil_up(wil);
 761         mutex_unlock(&wil->mutex);
 762
 763         return rc;
 764 }
 765
 766 int __wil_down(struct wil6210_priv *wil)
 767 {
 768         int iter = WAIT_FOR_DISCONNECT_TIMEOUT_MS /
 769                         WAIT_FOR_DISCONNECT_INTERVAL_MS;
 770
 771         WARN_ON(!mutex_is_locked(&wil->mutex));
 772
 773         if (wil->platform_ops.bus_request)
 774                 wil->platform_ops.bus_request(wil->platform_handle, 0);
 775
 776         wil_disable_irq(wil);
 777         if (test_and_clear_bit(wil_status_napi_en, &wil->status)) {
 778                 napi_disable(&wil->napi_rx);
 779                 napi_disable(&wil->napi_tx);
 780                 wil_dbg_misc(wil, "NAPI disable\n");
 781         }
 782         wil_enable_irq(wil);
 783
 784         if (wil->scan_request) {
 785                 wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
 786                              wil->scan_request);
 787                 del_timer_sync(&wil->scan_timer);
 788                 cfg80211_scan_done(wil->scan_request, true);
 789                 wil->scan_request = NULL;
 790         }
 791
 792         if (test_bit(wil_status_fwconnected, &wil->status) ||
 793             test_bit(wil_status_fwconnecting, &wil->status))
 794                 wmi_send(wil, WMI_DISCONNECT_CMDID, NULL, 0);
 795
 796         /* make sure wil is idle (not connected) */
 797         mutex_unlock(&wil->mutex);
 798         while (iter--) {
 799                 int idle = !test_bit(wil_status_fwconnected, &wil->status) &&
 800                            !test_bit(wil_status_fwconnecting, &wil->status);
 801                 if (idle)
 802                         break;
 803                 msleep(WAIT_FOR_DISCONNECT_INTERVAL_MS);
 804         }
 805         mutex_lock(&wil->mutex);
 806
 807         if (!iter)
 808                 wil_err(wil, "timeout waiting for idle FW/HW\n");
 809
 810         wil_rx_fini(wil);
 811
 812         return 0;
 813 }
 814
 815 int wil_down(struct wil6210_priv *wil)
 816 {
 817         int rc;
 818
 819         wil_dbg_misc(wil, "%s()\n", __func__);
 820
 821         wil_set_recovery_state(wil, fw_recovery_idle);
 822         mutex_lock(&wil->mutex);
 823         rc = __wil_down(wil);
 824         mutex_unlock(&wil->mutex);
 825
 826         return rc;
 827 }
 828
 829 int wil_find_cid(struct wil6210_priv *wil, const u8 *mac)
 830 {
 831         int i;
 832         int rc = -ENOENT;
 833
 834         for (i = 0; i < ARRAY_SIZE(wil->sta); i++) {
 835                 if ((wil->sta[i].status != wil_sta_unused) &&
 836                     ether_addr_equal(wil->sta[i].addr, mac)) {
 837                         rc = i;
 838                         break;
 839                 }
 840         }
 841
 842         return rc;
 843 }