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 {
  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 int wil_wait_for_recovery(struct wil6210_priv *wil)
 195 {
 196         if (wait_event_interruptible(wil->wq, wil->recovery_state !=
 197                                      fw_recovery_pending)) {
 198                 wil_err(wil, "Interrupt, canceling recovery\n");
 199                 return -ERESTARTSYS;
 200         }
 201         if (wil->recovery_state != fw_recovery_running) {
 202                 wil_info(wil, "Recovery cancelled\n");
 203                 return -EINTR;
 204         }
 205         wil_info(wil, "Proceed with recovery\n");
 206         return 0;
 207 }
 208
 209 void wil_set_recovery_state(struct wil6210_priv *wil, int state)
 210 {
 211         wil_dbg_misc(wil, "%s(%d -> %d)\n", __func__,
 212                      wil->recovery_state, state);
 213
 214         wil->recovery_state = state;
 215         wake_up_interruptible(&wil->wq);
 216 }
 217
 218 static void wil_fw_error_worker(struct work_struct *work)
 219 {
 220         struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
 221                                                 fw_error_worker);
 222         struct wireless_dev *wdev = wil->wdev;
 223
 224         wil_dbg_misc(wil, "fw error worker\n");
 225
 226         /* increment @recovery_count if less then WIL6210_FW_RECOVERY_TO
 227          * passed since last recovery attempt
 228          */
 229         if (time_is_after_jiffies(wil->last_fw_recovery +
 230                                   WIL6210_FW_RECOVERY_TO))
 231                 wil->recovery_count++;
 232         else
 233                 wil->recovery_count = 1; /* fw was alive for a long time */
 234
 235         if (wil->recovery_count > WIL6210_FW_RECOVERY_RETRIES) {
 236                 wil_err(wil, "too many recovery attempts (%d), giving up\n",
 237                         wil->recovery_count);
 238                 return;
 239         }
 240
 241         wil->last_fw_recovery = jiffies;
 242
 243         mutex_lock(&wil->mutex);
 244         switch (wdev->iftype) {
 245         case NL80211_IFTYPE_STATION:
 246         case NL80211_IFTYPE_P2P_CLIENT:
 247         case NL80211_IFTYPE_MONITOR:
 248                 wil_info(wil, "fw error recovery requested (try %d)...\n",
 249                          wil->recovery_count);
 250                 if (!no_fw_recovery)
 251                         wil->recovery_state = fw_recovery_running;
 252                 if (0 != wil_wait_for_recovery(wil))
 253                         break;
 254
 255                 __wil_down(wil);
 256                 __wil_up(wil);
 257                 break;
 258         case NL80211_IFTYPE_AP:
 259         case NL80211_IFTYPE_P2P_GO:
 260                 /* recovery in these modes is done by upper layers */
 261                 break;
 262         default:
 263                 break;
 264         }
 265         mutex_unlock(&wil->mutex);
 266 }
 267
 268 static int wil_find_free_vring(struct wil6210_priv *wil)
 269 {
 270         int i;
 271
 272         for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
 273                 if (!wil->vring_tx[i].va)
 274                         return i;
 275         }
 276         return -EINVAL;
 277 }
 278
 279 static void wil_connect_worker(struct work_struct *work)
 280 {
 281         int rc;
 282         struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
 283                                                 connect_worker);
 284         int cid = wil->pending_connect_cid;
 285         int ringid = wil_find_free_vring(wil);
 286
 287         if (cid < 0) {
 288                 wil_err(wil, "No connection pending\n");
 289                 return;
 290         }
 291
 292         wil_dbg_wmi(wil, "Configure for connection CID %d\n", cid);
 293
 294         rc = wil_vring_init_tx(wil, ringid, WIL6210_TX_RING_SIZE, cid, 0);
 295         wil->pending_connect_cid = -1;
 296         if (rc == 0) {
 297                 wil->sta[cid].status = wil_sta_connected;
 298                 wil_link_on(wil);
 299         } else {
 300                 wil->sta[cid].status = wil_sta_unused;
 301         }
 302 }
 303
 304 int wil_priv_init(struct wil6210_priv *wil)
 305 {
 306         uint i;
 307
 308         wil_dbg_misc(wil, "%s()\n", __func__);
 309
 310         memset(wil->sta, 0, sizeof(wil->sta));
 311         for (i = 0; i < WIL6210_MAX_CID; i++)
 312                 spin_lock_init(&wil->sta[i].tid_rx_lock);
 313
 314         mutex_init(&wil->mutex);
 315         mutex_init(&wil->wmi_mutex);
 316
 317         init_completion(&wil->wmi_ready);
 318         init_completion(&wil->wmi_call);
 319
 320         wil->pending_connect_cid = -1;
 321         setup_timer(&wil->connect_timer, wil_connect_timer_fn, (ulong)wil);
 322         setup_timer(&wil->scan_timer, wil_scan_timer_fn, (ulong)wil);
 323
 324         INIT_WORK(&wil->connect_worker, wil_connect_worker);
 325         INIT_WORK(&wil->disconnect_worker, wil_disconnect_worker);
 326         INIT_WORK(&wil->wmi_event_worker, wmi_event_worker);
 327         INIT_WORK(&wil->fw_error_worker, wil_fw_error_worker);
 328
 329         INIT_LIST_HEAD(&wil->pending_wmi_ev);
 330         spin_lock_init(&wil->wmi_ev_lock);
 331         init_waitqueue_head(&wil->wq);
 332
 333         wil->wmi_wq = create_singlethread_workqueue(WIL_NAME"_wmi");
 334         if (!wil->wmi_wq)
 335                 return -EAGAIN;
 336
 337         wil->wmi_wq_conn = create_singlethread_workqueue(WIL_NAME"_connect");
 338         if (!wil->wmi_wq_conn) {
 339                 destroy_workqueue(wil->wmi_wq);
 340                 return -EAGAIN;
 341         }
 342
 343         wil->last_fw_recovery = jiffies;
 344         wil->itr_trsh = itr_trsh;
 345
 346         return 0;
 347 }
 348
 349 void wil6210_disconnect(struct wil6210_priv *wil, const u8 *bssid)
 350 {
 351         wil_dbg_misc(wil, "%s()\n", __func__);
 352
 353         del_timer_sync(&wil->connect_timer);
 354         _wil6210_disconnect(wil, bssid);
 355 }
 356
 357 void wil_priv_deinit(struct wil6210_priv *wil)
 358 {
 359         wil_dbg_misc(wil, "%s()\n", __func__);
 360
 361         wil_set_recovery_state(wil, fw_recovery_idle);
 362         del_timer_sync(&wil->scan_timer);
 363         cancel_work_sync(&wil->disconnect_worker);
 364         cancel_work_sync(&wil->fw_error_worker);
 365         mutex_lock(&wil->mutex);
 366         wil6210_disconnect(wil, NULL);
 367         mutex_unlock(&wil->mutex);
 368         wmi_event_flush(wil);
 369         destroy_workqueue(wil->wmi_wq_conn);
 370         destroy_workqueue(wil->wmi_wq);
 371 }
 372
 373 /* target operations */
 374 /* register read */
 375 #define R(a) ioread32(wil->csr + HOSTADDR(a))
 376 /* register write. wmb() to make sure it is completed */
 377 #define W(a, v) do { iowrite32(v, wil->csr + HOSTADDR(a)); wmb(); } while (0)
 378 /* register set = read, OR, write */
 379 #define S(a, v) W(a, R(a) | v)
 380 /* register clear = read, AND with inverted, write */
 381 #define C(a, v) W(a, R(a) & ~v)
 382
 383 static inline void wil_halt_cpu(struct wil6210_priv *wil)
 384 {
 385         W(RGF_USER_USER_CPU_0, BIT_USER_USER_CPU_MAN_RST);
 386         W(RGF_USER_MAC_CPU_0,  BIT_USER_MAC_CPU_MAN_RST);
 387 }
 388
 389 static inline void wil_release_cpu(struct wil6210_priv *wil)
 390 {
 391         /* Start CPU */
 392         W(RGF_USER_USER_CPU_0, 1);
 393 }
 394
 395 static int wil_target_reset(struct wil6210_priv *wil)
 396 {
 397         int delay = 0;
 398         u32 hw_state;
 399         u32 rev_id;
 400         bool is_sparrow = (wil->board->board == WIL_BOARD_SPARROW);
 401
 402         wil_dbg_misc(wil, "Resetting \"%s\"...\n", wil->board->name);
 403
 404         wil->hw_version = R(RGF_USER_FW_REV_ID);
 405         rev_id = wil->hw_version & 0xff;
 406
 407         /* Clear MAC link up */
 408         S(RGF_HP_CTRL, BIT(15));
 409         S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT_HPAL_PERST_FROM_PAD);
 410         S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT_CAR_PERST_RST);
 411
 412         wil_halt_cpu(wil);
 413         C(RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_CAR_AHB_SW_SEL); /* 40 MHz */
 414
 415         if (is_sparrow) {
 416                 W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x3ff81f);
 417                 W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_1, 0xf);
 418         }
 419
 420         W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0xFE000000);
 421         W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0x0000003F);
 422         W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, is_sparrow ? 0x000000f0 : 0x00000170);
 423         W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0xFFE7FE00);
 424
 425         if (is_sparrow) {
 426                 W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x0);
 427                 W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_1, 0x0);
 428         }
 429
 430         W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0);
 431         W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0);
 432         W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0);
 433         W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
 434
 435         if (is_sparrow) {
 436                 W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000003);
 437                 /* reset A2 PCIE AHB */
 438                 W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00008000);
 439         } else {
 440                 W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000001);
 441                 if (rev_id == 1) {
 442                         /* reset A1 BOTH PCIE AHB & PCIE RGF */
 443                         W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00000080);
 444                 } else {
 445                         W(RGF_PCIE_LOS_COUNTER_CTL, BIT(6) | BIT(8));
 446                         W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00008000);
 447                 }
 448         }
 449
 450         /* TODO: check order here!!! Erez code is different */
 451         W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
 452
 453         /* wait until device ready. typical time is 200..250 msec */
 454         do {
 455                 msleep(RST_DELAY);
 456                 hw_state = R(RGF_USER_HW_MACHINE_STATE);
 457                 if (delay++ > RST_COUNT) {
 458                         wil_err(wil, "Reset not completed, hw_state 0x%08x\n",
 459                                 hw_state);
 460                         return -ETIME;
 461                 }
 462         } while (hw_state != HW_MACHINE_BOOT_DONE);
 463
 464         /* TODO: Erez check rev_id != 1 */
 465         if (!is_sparrow && (rev_id != 1))
 466                 W(RGF_PCIE_LOS_COUNTER_CTL, BIT(8));
 467
 468         C(RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_RST_PWGD);
 469
 470         wil_dbg_misc(wil, "Reset completed in %d ms\n", delay * RST_DELAY);
 471         return 0;
 472 }
 473
 474 /**
 475  * wil_set_itr_trsh: - apply interrupt coalescing params
 476  */
 477 void wil_set_itr_trsh(struct wil6210_priv *wil)
 478 {
 479         /* disable, use usec resolution */
 480         W(RGF_DMA_ITR_CNT_CRL, BIT_DMA_ITR_CNT_CRL_EXT_TICK);
 481
 482         /* disable interrupt moderation for monitor
 483          * to get better timestamp precision
 484          */
 485         if (wil->wdev->iftype == NL80211_IFTYPE_MONITOR)
 486                 return;
 487
 488         wil_info(wil, "set ITR_TRSH = %d usec\n", wil->itr_trsh);
 489         W(RGF_DMA_ITR_CNT_TRSH, wil->itr_trsh);
 490         W(RGF_DMA_ITR_CNT_CRL, BIT_DMA_ITR_CNT_CRL_EN |
 491           BIT_DMA_ITR_CNT_CRL_EXT_TICK); /* start it */
 492 }
 493
 494 #undef R
 495 #undef W
 496 #undef S
 497 #undef C
 498
 499 void wil_mbox_ring_le2cpus(struct wil6210_mbox_ring *r)
 500 {
 501         le32_to_cpus(&r->base);
 502         le16_to_cpus(&r->entry_size);
 503         le16_to_cpus(&r->size);
 504         le32_to_cpus(&r->tail);
 505         le32_to_cpus(&r->head);
 506 }
 507
 508 static int wil_wait_for_fw_ready(struct wil6210_priv *wil)
 509 {
 510         ulong to = msecs_to_jiffies(1000);
 511         ulong left = wait_for_completion_timeout(&wil->wmi_ready, to);
 512
 513         if (0 == left) {
 514                 wil_err(wil, "Firmware not ready\n");
 515                 return -ETIME;
 516         } else {
 517                 wil_info(wil, "FW ready after %d ms. HW version 0x%08x\n",
 518                          jiffies_to_msecs(to-left), wil->hw_version);
 519         }
 520         return 0;
 521 }
 522
 523 /*
 524  * We reset all the structures, and we reset the UMAC.
 525  * After calling this routine, you're expected to reload
 526  * the firmware.
 527  */
 528 int wil_reset(struct wil6210_priv *wil)
 529 {
 530         int rc;
 531
 532         wil_dbg_misc(wil, "%s()\n", __func__);
 533
 534         WARN_ON(!mutex_is_locked(&wil->mutex));
 535         WARN_ON(test_bit(wil_status_napi_en, &wil->status));
 536
 537         cancel_work_sync(&wil->disconnect_worker);
 538         wil6210_disconnect(wil, NULL);
 539
 540         wil->status = 0; /* prevent NAPI from being scheduled */
 541
 542         if (wil->scan_request) {
 543                 wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
 544                              wil->scan_request);
 545                 del_timer_sync(&wil->scan_timer);
 546                 cfg80211_scan_done(wil->scan_request, true);
 547                 wil->scan_request = NULL;
 548         }
 549
 550         wil_mask_irq(wil);
 551
 552         wmi_event_flush(wil);
 553
 554         flush_workqueue(wil->wmi_wq_conn);
 555         flush_workqueue(wil->wmi_wq);
 556
 557         rc = wil_target_reset(wil);
 558         wil_rx_fini(wil);
 559         if (rc)
 560                 return rc;
 561
 562         if (!no_fw_load) {
 563                 wil_info(wil, "Use firmware <%s>\n", WIL_FW_NAME);
 564                 wil_halt_cpu(wil);
 565                 /* Loading f/w from the file */
 566                 rc = wil_request_firmware(wil, WIL_FW_NAME);
 567                 if (rc)
 568                         return rc;
 569
 570                 /* clear any interrupts which on-card-firmware may have set */
 571                 wil6210_clear_irq(wil);
 572                 { /* CAF_ICR - clear and mask */
 573                         u32 a = HOSTADDR(RGF_CAF_ICR) +
 574                                 offsetof(struct RGF_ICR, ICR);
 575                         u32 m = HOSTADDR(RGF_CAF_ICR) +
 576                                 offsetof(struct RGF_ICR, IMV);
 577                         u32 icr = ioread32(wil->csr + a);
 578
 579                         iowrite32(icr, wil->csr + a); /* W1C */
 580                         iowrite32(~0, wil->csr + m);
 581                         wmb(); /* wait for completion */
 582                 }
 583                 wil_release_cpu(wil);
 584         } else {
 585                 wil_info(wil, "Use firmware from on-card flash\n");
 586         }
 587
 588         /* init after reset */
 589         wil->pending_connect_cid = -1;
 590         reinit_completion(&wil->wmi_ready);
 591         reinit_completion(&wil->wmi_call);
 592
 593         wil_unmask_irq(wil);
 594
 595         /* we just started MAC, wait for FW ready */
 596         rc = wil_wait_for_fw_ready(wil);
 597
 598         return rc;
 599 }
 600
 601 void wil_fw_error_recovery(struct wil6210_priv *wil)
 602 {
 603         wil_dbg_misc(wil, "starting fw error recovery\n");
 604         wil->recovery_state = fw_recovery_pending;
 605         schedule_work(&wil->fw_error_worker);
 606 }
 607
 608 void wil_link_on(struct wil6210_priv *wil)
 609 {
 610         struct net_device *ndev = wil_to_ndev(wil);
 611
 612         wil_dbg_misc(wil, "%s()\n", __func__);
 613
 614         netif_carrier_on(ndev);
 615         wil_dbg_misc(wil, "netif_tx_wake : link on\n");
 616         netif_tx_wake_all_queues(ndev);
 617 }
 618
 619 void wil_link_off(struct wil6210_priv *wil)
 620 {
 621         struct net_device *ndev = wil_to_ndev(wil);
 622
 623         wil_dbg_misc(wil, "%s()\n", __func__);
 624
 625         netif_tx_stop_all_queues(ndev);
 626         wil_dbg_misc(wil, "netif_tx_stop : link off\n");
 627         netif_carrier_off(ndev);
 628 }
 629
 630 int __wil_up(struct wil6210_priv *wil)
 631 {
 632         struct net_device *ndev = wil_to_ndev(wil);
 633         struct wireless_dev *wdev = wil->wdev;
 634         int rc;
 635
 636         WARN_ON(!mutex_is_locked(&wil->mutex));
 637
 638         rc = wil_reset(wil);
 639         if (rc)
 640                 return rc;
 641
 642         /* Rx VRING. After MAC and beacon */
 643         rc = wil_rx_init(wil);
 644         if (rc)
 645                 return rc;
 646
 647         switch (wdev->iftype) {
 648         case NL80211_IFTYPE_STATION:
 649                 wil_dbg_misc(wil, "type: STATION\n");
 650                 ndev->type = ARPHRD_ETHER;
 651                 break;
 652         case NL80211_IFTYPE_AP:
 653                 wil_dbg_misc(wil, "type: AP\n");
 654                 ndev->type = ARPHRD_ETHER;
 655                 break;
 656         case NL80211_IFTYPE_P2P_CLIENT:
 657                 wil_dbg_misc(wil, "type: P2P_CLIENT\n");
 658                 ndev->type = ARPHRD_ETHER;
 659                 break;
 660         case NL80211_IFTYPE_P2P_GO:
 661                 wil_dbg_misc(wil, "type: P2P_GO\n");
 662                 ndev->type = ARPHRD_ETHER;
 663                 break;
 664         case NL80211_IFTYPE_MONITOR:
 665                 wil_dbg_misc(wil, "type: Monitor\n");
 666                 ndev->type = ARPHRD_IEEE80211_RADIOTAP;
 667                 /* ARPHRD_IEEE80211 or ARPHRD_IEEE80211_RADIOTAP ? */
 668                 break;
 669         default:
 670                 return -EOPNOTSUPP;
 671         }
 672
 673         /* MAC address - pre-requisite for other commands */
 674         wmi_set_mac_address(wil, ndev->dev_addr);
 675
 676         wil_dbg_misc(wil, "NAPI enable\n");
 677         napi_enable(&wil->napi_rx);
 678         napi_enable(&wil->napi_tx);
 679         set_bit(wil_status_napi_en, &wil->status);
 680
 681         if (wil->platform_ops.bus_request)
 682                 wil->platform_ops.bus_request(wil->platform_handle,
 683                                               WIL_MAX_BUS_REQUEST_KBPS);
 684
 685         return 0;
 686 }
 687
 688 int wil_up(struct wil6210_priv *wil)
 689 {
 690         int rc;
 691
 692         wil_dbg_misc(wil, "%s()\n", __func__);
 693
 694         mutex_lock(&wil->mutex);
 695         rc = __wil_up(wil);
 696         mutex_unlock(&wil->mutex);
 697
 698         return rc;
 699 }
 700
 701 int __wil_down(struct wil6210_priv *wil)
 702 {
 703         int iter = WAIT_FOR_DISCONNECT_TIMEOUT_MS /
 704                         WAIT_FOR_DISCONNECT_INTERVAL_MS;
 705
 706         WARN_ON(!mutex_is_locked(&wil->mutex));
 707
 708         if (wil->platform_ops.bus_request)
 709                 wil->platform_ops.bus_request(wil->platform_handle, 0);
 710
 711         wil_disable_irq(wil);
 712         if (test_and_clear_bit(wil_status_napi_en, &wil->status)) {
 713                 napi_disable(&wil->napi_rx);
 714                 napi_disable(&wil->napi_tx);
 715                 wil_dbg_misc(wil, "NAPI disable\n");
 716         }
 717         wil_enable_irq(wil);
 718
 719         if (wil->scan_request) {
 720                 wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
 721                              wil->scan_request);
 722                 del_timer_sync(&wil->scan_timer);
 723                 cfg80211_scan_done(wil->scan_request, true);
 724                 wil->scan_request = NULL;
 725         }
 726
 727         if (test_bit(wil_status_fwconnected, &wil->status) ||
 728             test_bit(wil_status_fwconnecting, &wil->status))
 729                 wmi_send(wil, WMI_DISCONNECT_CMDID, NULL, 0);
 730
 731         /* make sure wil is idle (not connected) */
 732         mutex_unlock(&wil->mutex);
 733         while (iter--) {
 734                 int idle = !test_bit(wil_status_fwconnected, &wil->status) &&
 735                            !test_bit(wil_status_fwconnecting, &wil->status);
 736                 if (idle)
 737                         break;
 738                 msleep(WAIT_FOR_DISCONNECT_INTERVAL_MS);
 739         }
 740         mutex_lock(&wil->mutex);
 741
 742         if (!iter)
 743                 wil_err(wil, "timeout waiting for idle FW/HW\n");
 744
 745         wil_rx_fini(wil);
 746
 747         return 0;
 748 }
 749
 750 int wil_down(struct wil6210_priv *wil)
 751 {
 752         int rc;
 753
 754         wil_dbg_misc(wil, "%s()\n", __func__);
 755
 756         wil_set_recovery_state(wil, fw_recovery_idle);
 757         mutex_lock(&wil->mutex);
 758         rc = __wil_down(wil);
 759         mutex_unlock(&wil->mutex);
 760
 761         return rc;
 762 }
 763
 764 int wil_find_cid(struct wil6210_priv *wil, const u8 *mac)
 765 {
 766         int i;
 767         int rc = -ENOENT;
 768
 769         for (i = 0; i < ARRAY_SIZE(wil->sta); i++) {
 770                 if ((wil->sta[i].status != wil_sta_unused) &&
 771                     ether_addr_equal(wil->sta[i].addr, mac)) {
 772                         rc = i;
 773                         break;
 774                 }
 775         }
 776
 777         return rc;
 778 }