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