drivers/net/wireless/marvell/libertas/main.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * This file contains the major functions in WLAN
   4  * driver. It includes init, exit, open, close and main
   5  * thread etc..
   6  */
   7
   8 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
   9
  10 #include <linux/module.h>
  11 #include <linux/delay.h>
  12 #include <linux/etherdevice.h>
  13 #include <linux/hardirq.h>
  14 #include <linux/netdevice.h>
  15 #include <linux/if_arp.h>
  16 #include <linux/kthread.h>
  17 #include <linux/kfifo.h>
  18 #include <linux/slab.h>
  19 #include <net/cfg80211.h>
  20
  21 #include "host.h"
  22 #include "decl.h"
  23 #include "dev.h"
  24 #include "cfg.h"
  25 #include "debugfs.h"
  26 #include "cmd.h"
  27 #include "mesh.h"
  28
  29 #define DRIVER_RELEASE_VERSION "323.p0"
  30 const char lbs_driver_version[] = "COMM-USB8388-" DRIVER_RELEASE_VERSION
  31 #ifdef  DEBUG
  32     "-dbg"
  33 #endif
  34     "";
  35
  36
  37 /* Module parameters */
  38 unsigned int lbs_debug;
  39 EXPORT_SYMBOL_GPL(lbs_debug);
  40 module_param_named(libertas_debug, lbs_debug, int, 0644);
  41
  42 unsigned int lbs_disablemesh;
  43 EXPORT_SYMBOL_GPL(lbs_disablemesh);
  44 module_param_named(libertas_disablemesh, lbs_disablemesh, int, 0644);
  45
  46
  47 /*
  48  * This global structure is used to send the confirm_sleep command as
  49  * fast as possible down to the firmware.
  50  */
  51 struct cmd_confirm_sleep confirm_sleep;
  52
  53
  54 /*
  55  * the table to keep region code
  56  */
  57 u16 lbs_region_code_to_index[MRVDRV_MAX_REGION_CODE] =
  58     { 0x10, 0x20, 0x30, 0x31, 0x32, 0x40 };
  59
  60 /*
  61  * FW rate table.  FW refers to rates by their index in this table, not by the
  62  * rate value itself.  Values of 0x00 are
  63  * reserved positions.
  64  */
  65 static u8 fw_data_rates[MAX_RATES] =
  66     { 0x02, 0x04, 0x0B, 0x16, 0x00, 0x0C, 0x12,
  67       0x18, 0x24, 0x30, 0x48, 0x60, 0x6C, 0x00
  68 };
  69
  70 /**
  71  *  lbs_fw_index_to_data_rate - use index to get the data rate
  72  *
  73  *  @idx:       The index of data rate
  74  *  returns:    data rate or 0
  75  */
  76 u32 lbs_fw_index_to_data_rate(u8 idx)
  77 {
  78         if (idx >= sizeof(fw_data_rates))
  79                 idx = 0;
  80         return fw_data_rates[idx];
  81 }
  82
  83 /**
  84  *  lbs_data_rate_to_fw_index - use rate to get the index
  85  *
  86  *  @rate:      data rate
  87  *  returns:    index or 0
  88  */
  89 u8 lbs_data_rate_to_fw_index(u32 rate)
  90 {
  91         u8 i;
  92
  93         if (!rate)
  94                 return 0;
  95
  96         for (i = 0; i < sizeof(fw_data_rates); i++) {
  97                 if (rate == fw_data_rates[i])
  98                         return i;
  99         }
 100         return 0;
 101 }
 102
 103 int lbs_set_iface_type(struct lbs_private *priv, enum nl80211_iftype type)
 104 {
 105         int ret = 0;
 106
 107         switch (type) {
 108         case NL80211_IFTYPE_MONITOR:
 109                 ret = lbs_set_monitor_mode(priv, 1);
 110                 break;
 111         case NL80211_IFTYPE_STATION:
 112                 if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR)
 113                         ret = lbs_set_monitor_mode(priv, 0);
 114                 if (!ret)
 115                         ret = lbs_set_snmp_mib(priv, SNMP_MIB_OID_BSS_TYPE, 1);
 116                 break;
 117         case NL80211_IFTYPE_ADHOC:
 118                 if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR)
 119                         ret = lbs_set_monitor_mode(priv, 0);
 120                 if (!ret)
 121                         ret = lbs_set_snmp_mib(priv, SNMP_MIB_OID_BSS_TYPE, 2);
 122                 break;
 123         default:
 124                 ret = -ENOTSUPP;
 125         }
 126         return ret;
 127 }
 128
 129 int lbs_start_iface(struct lbs_private *priv)
 130 {
 131         struct cmd_ds_802_11_mac_address cmd;
 132         int ret;
 133
 134         if (priv->power_restore) {
 135                 ret = priv->power_restore(priv);
 136                 if (ret)
 137                         return ret;
 138         }
 139
 140         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 141         cmd.action = cpu_to_le16(CMD_ACT_SET);
 142         memcpy(cmd.macadd, priv->current_addr, ETH_ALEN);
 143
 144         ret = lbs_cmd_with_response(priv, CMD_802_11_MAC_ADDRESS, &cmd);
 145         if (ret) {
 146                 lbs_deb_net("set MAC address failed\n");
 147                 goto err;
 148         }
 149
 150         ret = lbs_set_iface_type(priv, priv->wdev->iftype);
 151         if (ret) {
 152                 lbs_deb_net("set iface type failed\n");
 153                 goto err;
 154         }
 155
 156         ret = lbs_set_11d_domain_info(priv);
 157         if (ret) {
 158                 lbs_deb_net("set 11d domain info failed\n");
 159                 goto err;
 160         }
 161
 162         lbs_update_channel(priv);
 163
 164         priv->iface_running = true;
 165         return 0;
 166
 167 err:
 168         if (priv->power_save)
 169                 priv->power_save(priv);
 170         return ret;
 171 }
 172
 173 /**
 174  *  lbs_dev_open - open the ethX interface
 175  *
 176  *  @dev:       A pointer to &net_device structure
 177  *  returns:    0 or -EBUSY if monitor mode active
 178  */
 179 static int lbs_dev_open(struct net_device *dev)
 180 {
 181         struct lbs_private *priv = dev->ml_priv;
 182         int ret = 0;
 183
 184         if (!priv->iface_running) {
 185                 ret = lbs_start_iface(priv);
 186                 if (ret)
 187                         goto out;
 188         }
 189
 190         spin_lock_irq(&priv->driver_lock);
 191
 192         netif_carrier_off(dev);
 193
 194         if (!priv->tx_pending_len)
 195                 netif_wake_queue(dev);
 196
 197         spin_unlock_irq(&priv->driver_lock);
 198
 199 out:
 200         return ret;
 201 }
 202
 203 static bool lbs_command_queue_empty(struct lbs_private *priv)
 204 {
 205         unsigned long flags;
 206         bool ret;
 207         spin_lock_irqsave(&priv->driver_lock, flags);
 208         ret = priv->cur_cmd == NULL && list_empty(&priv->cmdpendingq);
 209         spin_unlock_irqrestore(&priv->driver_lock, flags);
 210         return ret;
 211 }
 212
 213 int lbs_stop_iface(struct lbs_private *priv)
 214 {
 215         unsigned long flags;
 216         int ret = 0;
 217
 218         spin_lock_irqsave(&priv->driver_lock, flags);
 219         priv->iface_running = false;
 220         kfree_skb(priv->currenttxskb);
 221         priv->currenttxskb = NULL;
 222         priv->tx_pending_len = 0;
 223         spin_unlock_irqrestore(&priv->driver_lock, flags);
 224
 225         cancel_work_sync(&priv->mcast_work);
 226         del_timer_sync(&priv->tx_lockup_timer);
 227
 228         /* Disable command processing, and wait for all commands to complete */
 229         lbs_deb_main("waiting for commands to complete\n");
 230         wait_event(priv->waitq, lbs_command_queue_empty(priv));
 231         lbs_deb_main("all commands completed\n");
 232
 233         if (priv->power_save)
 234                 ret = priv->power_save(priv);
 235
 236         return ret;
 237 }
 238
 239 /**
 240  *  lbs_eth_stop - close the ethX interface
 241  *
 242  *  @dev:       A pointer to &net_device structure
 243  *  returns:    0
 244  */
 245 static int lbs_eth_stop(struct net_device *dev)
 246 {
 247         struct lbs_private *priv = dev->ml_priv;
 248
 249         if (priv->connect_status == LBS_CONNECTED)
 250                 lbs_disconnect(priv, WLAN_REASON_DEAUTH_LEAVING);
 251
 252         spin_lock_irq(&priv->driver_lock);
 253         netif_stop_queue(dev);
 254         spin_unlock_irq(&priv->driver_lock);
 255
 256         lbs_update_mcast(priv);
 257         cancel_delayed_work_sync(&priv->scan_work);
 258         if (priv->scan_req)
 259                 lbs_scan_done(priv);
 260
 261         netif_carrier_off(priv->dev);
 262
 263         if (!lbs_iface_active(priv))
 264                 lbs_stop_iface(priv);
 265
 266         return 0;
 267 }
 268
 269 void lbs_host_to_card_done(struct lbs_private *priv)
 270 {
 271         unsigned long flags;
 272
 273         spin_lock_irqsave(&priv->driver_lock, flags);
 274         del_timer(&priv->tx_lockup_timer);
 275
 276         priv->dnld_sent = DNLD_RES_RECEIVED;
 277
 278         /* Wake main thread if commands are pending */
 279         if (!priv->cur_cmd || priv->tx_pending_len > 0) {
 280                 if (!priv->wakeup_dev_required)
 281                         wake_up(&priv->waitq);
 282         }
 283
 284         spin_unlock_irqrestore(&priv->driver_lock, flags);
 285 }
 286 EXPORT_SYMBOL_GPL(lbs_host_to_card_done);
 287
 288 int lbs_set_mac_address(struct net_device *dev, void *addr)
 289 {
 290         int ret = 0;
 291         struct lbs_private *priv = dev->ml_priv;
 292         struct sockaddr *phwaddr = addr;
 293
 294         /*
 295          * Can only set MAC address when all interfaces are down, to be written
 296          * to the hardware when one of them is brought up.
 297          */
 298         if (lbs_iface_active(priv))
 299                 return -EBUSY;
 300
 301         /* In case it was called from the mesh device */
 302         dev = priv->dev;
 303
 304         memcpy(priv->current_addr, phwaddr->sa_data, ETH_ALEN);
 305         memcpy(dev->dev_addr, phwaddr->sa_data, ETH_ALEN);
 306         if (priv->mesh_dev)
 307                 memcpy(priv->mesh_dev->dev_addr, phwaddr->sa_data, ETH_ALEN);
 308
 309         return ret;
 310 }
 311
 312
 313 static inline int mac_in_list(unsigned char *list, int list_len,
 314                               unsigned char *mac)
 315 {
 316         while (list_len) {
 317                 if (!memcmp(list, mac, ETH_ALEN))
 318                         return 1;
 319                 list += ETH_ALEN;
 320                 list_len--;
 321         }
 322         return 0;
 323 }
 324
 325
 326 static int lbs_add_mcast_addrs(struct cmd_ds_mac_multicast_adr *cmd,
 327                                struct net_device *dev, int nr_addrs)
 328 {
 329         int i = nr_addrs;
 330         struct netdev_hw_addr *ha;
 331         int cnt;
 332
 333         if ((dev->flags & (IFF_UP|IFF_MULTICAST)) != (IFF_UP|IFF_MULTICAST))
 334                 return nr_addrs;
 335
 336         netif_addr_lock_bh(dev);
 337         cnt = netdev_mc_count(dev);
 338         netdev_for_each_mc_addr(ha, dev) {
 339                 if (mac_in_list(cmd->maclist, nr_addrs, ha->addr)) {
 340                         lbs_deb_net("mcast address %s:%pM skipped\n", dev->name,
 341                                     ha->addr);
 342                         cnt--;
 343                         continue;
 344                 }
 345
 346                 if (i == MRVDRV_MAX_MULTICAST_LIST_SIZE)
 347                         break;
 348                 memcpy(&cmd->maclist[6*i], ha->addr, ETH_ALEN);
 349                 lbs_deb_net("mcast address %s:%pM added to filter\n", dev->name,
 350                             ha->addr);
 351                 i++;
 352                 cnt--;
 353         }
 354         netif_addr_unlock_bh(dev);
 355         if (cnt)
 356                 return -EOVERFLOW;
 357
 358         return i;
 359 }
 360
 361 void lbs_update_mcast(struct lbs_private *priv)
 362 {
 363         struct cmd_ds_mac_multicast_adr mcast_cmd;
 364         int dev_flags = 0;
 365         int nr_addrs;
 366         int old_mac_control = priv->mac_control;
 367
 368         if (netif_running(priv->dev))
 369                 dev_flags |= priv->dev->flags;
 370         if (priv->mesh_dev && netif_running(priv->mesh_dev))
 371                 dev_flags |= priv->mesh_dev->flags;
 372
 373         if (dev_flags & IFF_PROMISC) {
 374                 priv->mac_control |= CMD_ACT_MAC_PROMISCUOUS_ENABLE;
 375                 priv->mac_control &= ~(CMD_ACT_MAC_ALL_MULTICAST_ENABLE |
 376                                        CMD_ACT_MAC_MULTICAST_ENABLE);
 377                 goto out_set_mac_control;
 378         } else if (dev_flags & IFF_ALLMULTI) {
 379         do_allmulti:
 380                 priv->mac_control |= CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
 381                 priv->mac_control &= ~(CMD_ACT_MAC_PROMISCUOUS_ENABLE |
 382                                        CMD_ACT_MAC_MULTICAST_ENABLE);
 383                 goto out_set_mac_control;
 384         }
 385
 386         /* Once for priv->dev, again for priv->mesh_dev if it exists */
 387         nr_addrs = lbs_add_mcast_addrs(&mcast_cmd, priv->dev, 0);
 388         if (nr_addrs >= 0 && priv->mesh_dev)
 389                 nr_addrs = lbs_add_mcast_addrs(&mcast_cmd, priv->mesh_dev, nr_addrs);
 390         if (nr_addrs < 0)
 391                 goto do_allmulti;
 392
 393         if (nr_addrs) {
 394                 int size = offsetof(struct cmd_ds_mac_multicast_adr,
 395                                     maclist[6*nr_addrs]);
 396
 397                 mcast_cmd.action = cpu_to_le16(CMD_ACT_SET);
 398                 mcast_cmd.hdr.size = cpu_to_le16(size);
 399                 mcast_cmd.nr_of_adrs = cpu_to_le16(nr_addrs);
 400
 401                 lbs_cmd_async(priv, CMD_MAC_MULTICAST_ADR, &mcast_cmd.hdr, size);
 402
 403                 priv->mac_control |= CMD_ACT_MAC_MULTICAST_ENABLE;
 404         } else
 405                 priv->mac_control &= ~CMD_ACT_MAC_MULTICAST_ENABLE;
 406
 407         priv->mac_control &= ~(CMD_ACT_MAC_PROMISCUOUS_ENABLE |
 408                                CMD_ACT_MAC_ALL_MULTICAST_ENABLE);
 409  out_set_mac_control:
 410         if (priv->mac_control != old_mac_control)
 411                 lbs_set_mac_control(priv);
 412 }
 413
 414 static void lbs_set_mcast_worker(struct work_struct *work)
 415 {
 416         struct lbs_private *priv = container_of(work, struct lbs_private, mcast_work);
 417         lbs_update_mcast(priv);
 418 }
 419
 420 void lbs_set_multicast_list(struct net_device *dev)
 421 {
 422         struct lbs_private *priv = dev->ml_priv;
 423
 424         schedule_work(&priv->mcast_work);
 425 }
 426
 427 /**
 428  *  lbs_thread - handles the major jobs in the LBS driver.
 429  *  It handles all events generated by firmware, RX data received
 430  *  from firmware and TX data sent from kernel.
 431  *
 432  *  @data:      A pointer to &lbs_thread structure
 433  *  returns:    0
 434  */
 435 static int lbs_thread(void *data)
 436 {
 437         struct net_device *dev = data;
 438         struct lbs_private *priv = dev->ml_priv;
 439         wait_queue_entry_t wait;
 440
 441         init_waitqueue_entry(&wait, current);
 442
 443         for (;;) {
 444                 int shouldsleep;
 445                 u8 resp_idx;
 446
 447                 lbs_deb_thread("1: currenttxskb %p, dnld_sent %d\n",
 448                                 priv->currenttxskb, priv->dnld_sent);
 449
 450                 add_wait_queue(&priv->waitq, &wait);
 451                 set_current_state(TASK_INTERRUPTIBLE);
 452                 spin_lock_irq(&priv->driver_lock);
 453
 454                 if (kthread_should_stop())
 455                         shouldsleep = 0;        /* Bye */
 456                 else if (priv->surpriseremoved)
 457                         shouldsleep = 1;        /* We need to wait until we're _told_ to die */
 458                 else if (priv->psstate == PS_STATE_SLEEP)
 459                         shouldsleep = 1;        /* Sleep mode. Nothing we can do till it wakes */
 460                 else if (priv->cmd_timed_out)
 461                         shouldsleep = 0;        /* Command timed out. Recover */
 462                 else if (!priv->fw_ready)
 463                         shouldsleep = 1;        /* Firmware not ready. We're waiting for it */
 464                 else if (priv->dnld_sent)
 465                         shouldsleep = 1;        /* Something is en route to the device already */
 466                 else if (priv->tx_pending_len > 0)
 467                         shouldsleep = 0;        /* We've a packet to send */
 468                 else if (priv->resp_len[priv->resp_idx])
 469                         shouldsleep = 0;        /* We have a command response */
 470                 else if (priv->cur_cmd)
 471                         shouldsleep = 1;        /* Can't send a command; one already running */
 472                 else if (!list_empty(&priv->cmdpendingq) &&
 473                                         !(priv->wakeup_dev_required))
 474                         shouldsleep = 0;        /* We have a command to send */
 475                 else if (kfifo_len(&priv->event_fifo))
 476                         shouldsleep = 0;        /* We have an event to process */
 477                 else
 478                         shouldsleep = 1;        /* No command */
 479
 480                 if (shouldsleep) {
 481                         lbs_deb_thread("sleeping, connect_status %d, "
 482                                 "psmode %d, psstate %d\n",
 483                                 priv->connect_status,
 484                                 priv->psmode, priv->psstate);
 485                         spin_unlock_irq(&priv->driver_lock);
 486                         schedule();
 487                 } else
 488                         spin_unlock_irq(&priv->driver_lock);
 489
 490                 lbs_deb_thread("2: currenttxskb %p, dnld_send %d\n",
 491                                priv->currenttxskb, priv->dnld_sent);
 492
 493                 set_current_state(TASK_RUNNING);
 494                 remove_wait_queue(&priv->waitq, &wait);
 495
 496                 lbs_deb_thread("3: currenttxskb %p, dnld_sent %d\n",
 497                                priv->currenttxskb, priv->dnld_sent);
 498
 499                 if (kthread_should_stop()) {
 500                         lbs_deb_thread("break from main thread\n");
 501                         break;
 502                 }
 503
 504                 if (priv->surpriseremoved) {
 505                         lbs_deb_thread("adapter removed; waiting to die...\n");
 506                         continue;
 507                 }
 508
 509                 lbs_deb_thread("4: currenttxskb %p, dnld_sent %d\n",
 510                        priv->currenttxskb, priv->dnld_sent);
 511
 512                 /* Process any pending command response */
 513                 spin_lock_irq(&priv->driver_lock);
 514                 resp_idx = priv->resp_idx;
 515                 if (priv->resp_len[resp_idx]) {
 516                         spin_unlock_irq(&priv->driver_lock);
 517                         lbs_process_command_response(priv,
 518                                 priv->resp_buf[resp_idx],
 519                                 priv->resp_len[resp_idx]);
 520                         spin_lock_irq(&priv->driver_lock);
 521                         priv->resp_len[resp_idx] = 0;
 522                 }
 523                 spin_unlock_irq(&priv->driver_lock);
 524
 525                 /* Process hardware events, e.g. card removed, link lost */
 526                 spin_lock_irq(&priv->driver_lock);
 527                 while (kfifo_len(&priv->event_fifo)) {
 528                         u32 event;
 529
 530                         if (kfifo_out(&priv->event_fifo,
 531                                 (unsigned char *) &event, sizeof(event)) !=
 532                                 sizeof(event))
 533                                         break;
 534                         spin_unlock_irq(&priv->driver_lock);
 535                         lbs_process_event(priv, event);
 536                         spin_lock_irq(&priv->driver_lock);
 537                 }
 538                 spin_unlock_irq(&priv->driver_lock);
 539
 540                 if (priv->wakeup_dev_required) {
 541                         lbs_deb_thread("Waking up device...\n");
 542                         /* Wake up device */
 543                         if (priv->exit_deep_sleep(priv))
 544                                 lbs_deb_thread("Wakeup device failed\n");
 545                         continue;
 546                 }
 547
 548                 /* command timeout stuff */
 549                 if (priv->cmd_timed_out && priv->cur_cmd) {
 550                         struct cmd_ctrl_node *cmdnode = priv->cur_cmd;
 551
 552                         netdev_info(dev, "Timeout submitting command 0x%04x\n",
 553                                     le16_to_cpu(cmdnode->cmdbuf->command));
 554                         lbs_complete_command(priv, cmdnode, -ETIMEDOUT);
 555
 556                         /* Reset card, but only when it isn't in the process
 557                          * of being shutdown anyway. */
 558                         if (!dev->dismantle && priv->reset_card)
 559                                 priv->reset_card(priv);
 560                 }
 561                 priv->cmd_timed_out = 0;
 562
 563                 if (!priv->fw_ready)
 564                         continue;
 565
 566                 /* Check if we need to confirm Sleep Request received previously */
 567                 if (priv->psstate == PS_STATE_PRE_SLEEP &&
 568                     !priv->dnld_sent && !priv->cur_cmd) {
 569                         if (priv->connect_status == LBS_CONNECTED) {
 570                                 lbs_deb_thread("pre-sleep, currenttxskb %p, "
 571                                         "dnld_sent %d, cur_cmd %p\n",
 572                                         priv->currenttxskb, priv->dnld_sent,
 573                                         priv->cur_cmd);
 574
 575                                 lbs_ps_confirm_sleep(priv);
 576                         } else {
 577                                 /* workaround for firmware sending
 578                                  * deauth/linkloss event immediately
 579                                  * after sleep request; remove this
 580                                  * after firmware fixes it
 581                                  */
 582                                 priv->psstate = PS_STATE_AWAKE;
 583                                 netdev_alert(dev,
 584                                              "ignore PS_SleepConfirm in non-connected state\n");
 585                         }
 586                 }
 587
 588                 /* The PS state is changed during processing of Sleep Request
 589                  * event above
 590                  */
 591                 if ((priv->psstate == PS_STATE_SLEEP) ||
 592                     (priv->psstate == PS_STATE_PRE_SLEEP))
 593                         continue;
 594
 595                 if (priv->is_deep_sleep)
 596                         continue;
 597
 598                 /* Execute the next command */
 599                 if (!priv->dnld_sent && !priv->cur_cmd)
 600                         lbs_execute_next_command(priv);
 601
 602                 spin_lock_irq(&priv->driver_lock);
 603                 if (!priv->dnld_sent && priv->tx_pending_len > 0) {
 604                         int ret = priv->hw_host_to_card(priv, MVMS_DAT,
 605                                                         priv->tx_pending_buf,
 606                                                         priv->tx_pending_len);
 607                         if (ret) {
 608                                 lbs_deb_tx("host_to_card failed %d\n", ret);
 609                                 priv->dnld_sent = DNLD_RES_RECEIVED;
 610                         } else {
 611                                 mod_timer(&priv->tx_lockup_timer,
 612                                           jiffies + (HZ * 5));
 613                         }
 614                         priv->tx_pending_len = 0;
 615                         if (!priv->currenttxskb) {
 616                                 /* We can wake the queues immediately if we aren't
 617                                    waiting for TX feedback */
 618                                 if (priv->connect_status == LBS_CONNECTED)
 619                                         netif_wake_queue(priv->dev);
 620                                 if (priv->mesh_dev &&
 621                                     netif_running(priv->mesh_dev))
 622                                         netif_wake_queue(priv->mesh_dev);
 623                         }
 624                 }
 625                 spin_unlock_irq(&priv->driver_lock);
 626         }
 627
 628         del_timer(&priv->command_timer);
 629         del_timer(&priv->tx_lockup_timer);
 630         del_timer(&priv->auto_deepsleep_timer);
 631
 632         return 0;
 633 }
 634
 635 /**
 636  * lbs_setup_firmware - gets the HW spec from the firmware and sets
 637  *        some basic parameters
 638  *
 639  *  @priv:      A pointer to &struct lbs_private structure
 640  *  returns:    0 or -1
 641  */
 642 static int lbs_setup_firmware(struct lbs_private *priv)
 643 {
 644         int ret = -1;
 645         s16 curlevel = 0, minlevel = 0, maxlevel = 0;
 646
 647         /* Read MAC address from firmware */
 648         eth_broadcast_addr(priv->current_addr);
 649         ret = lbs_update_hw_spec(priv);
 650         if (ret)
 651                 goto done;
 652
 653         /* Read power levels if available */
 654         ret = lbs_get_tx_power(priv, &curlevel, &minlevel, &maxlevel);
 655         if (ret == 0) {
 656                 priv->txpower_cur = curlevel;
 657                 priv->txpower_min = minlevel;
 658                 priv->txpower_max = maxlevel;
 659         }
 660
 661         /* Send cmd to FW to enable 11D function */
 662         ret = lbs_set_snmp_mib(priv, SNMP_MIB_OID_11D_ENABLE, 1);
 663         if (ret)
 664                 goto done;
 665
 666         ret = lbs_set_mac_control_sync(priv);
 667 done:
 668         return ret;
 669 }
 670
 671 int lbs_suspend(struct lbs_private *priv)
 672 {
 673         int ret;
 674
 675         if (priv->is_deep_sleep) {
 676                 ret = lbs_set_deep_sleep(priv, 0);
 677                 if (ret) {
 678                         netdev_err(priv->dev,
 679                                    "deep sleep cancellation failed: %d\n", ret);
 680                         return ret;
 681                 }
 682                 priv->deep_sleep_required = 1;
 683         }
 684
 685         ret = lbs_set_host_sleep(priv, 1);
 686
 687         netif_device_detach(priv->dev);
 688         if (priv->mesh_dev)
 689                 netif_device_detach(priv->mesh_dev);
 690
 691         return ret;
 692 }
 693 EXPORT_SYMBOL_GPL(lbs_suspend);
 694
 695 int lbs_resume(struct lbs_private *priv)
 696 {
 697         int ret;
 698
 699         ret = lbs_set_host_sleep(priv, 0);
 700
 701         netif_device_attach(priv->dev);
 702         if (priv->mesh_dev)
 703                 netif_device_attach(priv->mesh_dev);
 704
 705         if (priv->deep_sleep_required) {
 706                 priv->deep_sleep_required = 0;
 707                 ret = lbs_set_deep_sleep(priv, 1);
 708                 if (ret)
 709                         netdev_err(priv->dev,
 710                                    "deep sleep activation failed: %d\n", ret);
 711         }
 712
 713         if (priv->setup_fw_on_resume)
 714                 ret = lbs_setup_firmware(priv);
 715
 716         return ret;
 717 }
 718 EXPORT_SYMBOL_GPL(lbs_resume);
 719
 720 /**
 721  * lbs_cmd_timeout_handler - handles the timeout of command sending.
 722  * It will re-send the same command again.
 723  *
 724  * @data: &struct lbs_private pointer
 725  */
 726 static void lbs_cmd_timeout_handler(struct timer_list *t)
 727 {
 728         struct lbs_private *priv = from_timer(priv, t, command_timer);
 729         unsigned long flags;
 730
 731         spin_lock_irqsave(&priv->driver_lock, flags);
 732
 733         if (!priv->cur_cmd)
 734                 goto out;
 735
 736         netdev_info(priv->dev, "command 0x%04x timed out\n",
 737                     le16_to_cpu(priv->cur_cmd->cmdbuf->command));
 738
 739         priv->cmd_timed_out = 1;
 740
 741         /*
 742          * If the device didn't even acknowledge the command, reset the state
 743          * so that we don't block all future commands due to this one timeout.
 744          */
 745         if (priv->dnld_sent == DNLD_CMD_SENT)
 746                 priv->dnld_sent = DNLD_RES_RECEIVED;
 747
 748         wake_up(&priv->waitq);
 749 out:
 750         spin_unlock_irqrestore(&priv->driver_lock, flags);
 751 }
 752
 753 /**
 754  * lbs_tx_lockup_handler - handles the timeout of the passing of TX frames
 755  * to the hardware. This is known to frequently happen with SD8686 when
 756  * waking up after a Wake-on-WLAN-triggered resume.
 757  *
 758  * @data: &struct lbs_private pointer
 759  */
 760 static void lbs_tx_lockup_handler(struct timer_list *t)
 761 {
 762         struct lbs_private *priv = from_timer(priv, t, tx_lockup_timer);
 763         unsigned long flags;
 764
 765         spin_lock_irqsave(&priv->driver_lock, flags);
 766
 767         netdev_info(priv->dev, "TX lockup detected\n");
 768         if (priv->reset_card)
 769                 priv->reset_card(priv);
 770
 771         priv->dnld_sent = DNLD_RES_RECEIVED;
 772         wake_up_interruptible(&priv->waitq);
 773
 774         spin_unlock_irqrestore(&priv->driver_lock, flags);
 775 }
 776
 777 /**
 778  * auto_deepsleep_timer_fn - put the device back to deep sleep mode when
 779  * timer expires and no activity (command, event, data etc.) is detected.
 780  * @data:       &struct lbs_private pointer
 781  * returns:     N/A
 782  */
 783 static void auto_deepsleep_timer_fn(struct timer_list *t)
 784 {
 785         struct lbs_private *priv = from_timer(priv, t, auto_deepsleep_timer);
 786
 787         if (priv->is_activity_detected) {
 788                 priv->is_activity_detected = 0;
 789         } else {
 790                 if (priv->is_auto_deep_sleep_enabled &&
 791                     (!priv->wakeup_dev_required) &&
 792                     (priv->connect_status != LBS_CONNECTED)) {
 793                         struct cmd_header cmd;
 794
 795                         lbs_deb_main("Entering auto deep sleep mode...\n");
 796                         memset(&cmd, 0, sizeof(cmd));
 797                         cmd.size = cpu_to_le16(sizeof(cmd));
 798                         lbs_cmd_async(priv, CMD_802_11_DEEP_SLEEP, &cmd,
 799                                         sizeof(cmd));
 800                 }
 801         }
 802         mod_timer(&priv->auto_deepsleep_timer , jiffies +
 803                                 (priv->auto_deep_sleep_timeout * HZ)/1000);
 804 }
 805
 806 int lbs_enter_auto_deep_sleep(struct lbs_private *priv)
 807 {
 808         priv->is_auto_deep_sleep_enabled = 1;
 809         if (priv->is_deep_sleep)
 810                 priv->wakeup_dev_required = 1;
 811         mod_timer(&priv->auto_deepsleep_timer ,
 812                         jiffies + (priv->auto_deep_sleep_timeout * HZ)/1000);
 813
 814         return 0;
 815 }
 816
 817 int lbs_exit_auto_deep_sleep(struct lbs_private *priv)
 818 {
 819         priv->is_auto_deep_sleep_enabled = 0;
 820         priv->auto_deep_sleep_timeout = 0;
 821         del_timer(&priv->auto_deepsleep_timer);
 822
 823         return 0;
 824 }
 825
 826 static int lbs_init_adapter(struct lbs_private *priv)
 827 {
 828         int ret;
 829
 830         eth_broadcast_addr(priv->current_addr);
 831
 832         priv->connect_status = LBS_DISCONNECTED;
 833         priv->channel = DEFAULT_AD_HOC_CHANNEL;
 834         priv->mac_control = CMD_ACT_MAC_RX_ON | CMD_ACT_MAC_TX_ON;
 835         priv->radio_on = 1;
 836         priv->psmode = LBS802_11POWERMODECAM;
 837         priv->psstate = PS_STATE_FULL_POWER;
 838         priv->is_deep_sleep = 0;
 839         priv->is_auto_deep_sleep_enabled = 0;
 840         priv->deep_sleep_required = 0;
 841         priv->wakeup_dev_required = 0;
 842         init_waitqueue_head(&priv->ds_awake_q);
 843         init_waitqueue_head(&priv->scan_q);
 844         priv->authtype_auto = 1;
 845         priv->is_host_sleep_configured = 0;
 846         priv->is_host_sleep_activated = 0;
 847         init_waitqueue_head(&priv->host_sleep_q);
 848         init_waitqueue_head(&priv->fw_waitq);
 849         mutex_init(&priv->lock);
 850
 851         timer_setup(&priv->command_timer, lbs_cmd_timeout_handler, 0);
 852         timer_setup(&priv->tx_lockup_timer, lbs_tx_lockup_handler, 0);
 853         timer_setup(&priv->auto_deepsleep_timer, auto_deepsleep_timer_fn, 0);
 854
 855         INIT_LIST_HEAD(&priv->cmdfreeq);
 856         INIT_LIST_HEAD(&priv->cmdpendingq);
 857
 858         spin_lock_init(&priv->driver_lock);
 859
 860         /* Allocate the command buffers */
 861         if (lbs_allocate_cmd_buffer(priv)) {
 862                 pr_err("Out of memory allocating command buffers\n");
 863                 ret = -ENOMEM;
 864                 goto out;
 865         }
 866         priv->resp_idx = 0;
 867         priv->resp_len[0] = priv->resp_len[1] = 0;
 868
 869         /* Create the event FIFO */
 870         ret = kfifo_alloc(&priv->event_fifo, sizeof(u32) * 16, GFP_KERNEL);
 871         if (ret) {
 872                 pr_err("Out of memory allocating event FIFO buffer\n");
 873                 goto out;
 874         }
 875
 876 out:
 877         return ret;
 878 }
 879
 880 static void lbs_free_adapter(struct lbs_private *priv)
 881 {
 882         lbs_free_cmd_buffer(priv);
 883         kfifo_free(&priv->event_fifo);
 884         del_timer(&priv->command_timer);
 885         del_timer(&priv->tx_lockup_timer);
 886         del_timer(&priv->auto_deepsleep_timer);
 887 }
 888
 889 static const struct net_device_ops lbs_netdev_ops = {
 890         .ndo_open               = lbs_dev_open,
 891         .ndo_stop               = lbs_eth_stop,
 892         .ndo_start_xmit         = lbs_hard_start_xmit,
 893         .ndo_set_mac_address    = lbs_set_mac_address,
 894         .ndo_set_rx_mode        = lbs_set_multicast_list,
 895         .ndo_validate_addr      = eth_validate_addr,
 896 };
 897
 898 /**
 899  * lbs_add_card - adds the card. It will probe the
 900  * card, allocate the lbs_priv and initialize the device.
 901  *
 902  * @card:       A pointer to card
 903  * @dmdev:      A pointer to &struct device
 904  * returns:     A pointer to &struct lbs_private structure
 905  */
 906 struct lbs_private *lbs_add_card(void *card, struct device *dmdev)
 907 {
 908         struct net_device *dev;
 909         struct wireless_dev *wdev;
 910         struct lbs_private *priv = NULL;
 911         int err;
 912
 913         /* Allocate an Ethernet device and register it */
 914         wdev = lbs_cfg_alloc(dmdev);
 915         if (IS_ERR(wdev)) {
 916                 err = PTR_ERR(wdev);
 917                 pr_err("cfg80211 init failed\n");
 918                 goto err_cfg;
 919         }
 920
 921         wdev->iftype = NL80211_IFTYPE_STATION;
 922         priv = wdev_priv(wdev);
 923         priv->wdev = wdev;
 924
 925         err = lbs_init_adapter(priv);
 926         if (err) {
 927                 pr_err("failed to initialize adapter structure\n");
 928                 goto err_wdev;
 929         }
 930
 931         dev = alloc_netdev(0, "wlan%d", NET_NAME_UNKNOWN, ether_setup);
 932         if (!dev) {
 933                 err = -ENOMEM;
 934                 dev_err(dmdev, "no memory for network device instance\n");
 935                 goto err_adapter;
 936         }
 937
 938         dev->ieee80211_ptr = wdev;
 939         dev->ml_priv = priv;
 940         SET_NETDEV_DEV(dev, dmdev);
 941         wdev->netdev = dev;
 942         priv->dev = dev;
 943
 944         dev->netdev_ops = &lbs_netdev_ops;
 945         dev->watchdog_timeo = 5 * HZ;
 946         dev->ethtool_ops = &lbs_ethtool_ops;
 947         dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
 948
 949         priv->card = card;
 950
 951         strcpy(dev->name, "wlan%d");
 952
 953         lbs_deb_thread("Starting main thread...\n");
 954         init_waitqueue_head(&priv->waitq);
 955         priv->main_thread = kthread_run(lbs_thread, dev, "lbs_main");
 956         if (IS_ERR(priv->main_thread)) {
 957                 err = PTR_ERR(priv->main_thread);
 958                 lbs_deb_thread("Error creating main thread.\n");
 959                 goto err_ndev;
 960         }
 961
 962         priv->work_thread = create_singlethread_workqueue("lbs_worker");
 963         INIT_WORK(&priv->mcast_work, lbs_set_mcast_worker);
 964
 965         priv->wol_criteria = EHS_REMOVE_WAKEUP;
 966         priv->wol_gpio = 0xff;
 967         priv->wol_gap = 20;
 968         priv->ehs_remove_supported = true;
 969
 970         return priv;
 971
 972  err_ndev:
 973         free_netdev(dev);
 974
 975  err_adapter:
 976         lbs_free_adapter(priv);
 977
 978  err_wdev:
 979         lbs_cfg_free(priv);
 980
 981  err_cfg:
 982         return ERR_PTR(err);
 983 }
 984 EXPORT_SYMBOL_GPL(lbs_add_card);
 985
 986
 987 void lbs_remove_card(struct lbs_private *priv)
 988 {
 989         struct net_device *dev = priv->dev;
 990
 991         lbs_remove_mesh(priv);
 992
 993         if (priv->wiphy_registered)
 994                 lbs_scan_deinit(priv);
 995
 996         lbs_wait_for_firmware_load(priv);
 997
 998         /* worker thread destruction blocks on the in-flight command which
 999          * should have been cleared already in lbs_stop_card().
1000          */
1001         lbs_deb_main("destroying worker thread\n");
1002         destroy_workqueue(priv->work_thread);
1003         lbs_deb_main("done destroying worker thread\n");
1004
1005         if (priv->psmode == LBS802_11POWERMODEMAX_PSP) {
1006                 priv->psmode = LBS802_11POWERMODECAM;
1007                 /* no need to wakeup if already woken up,
1008                  * on suspend, this exit ps command is not processed
1009                  * the driver hangs
1010                  */
1011                 if (priv->psstate != PS_STATE_FULL_POWER)
1012                         lbs_set_ps_mode(priv, PS_MODE_ACTION_EXIT_PS, true);
1013         }
1014
1015         if (priv->is_deep_sleep) {
1016                 priv->is_deep_sleep = 0;
1017                 wake_up_interruptible(&priv->ds_awake_q);
1018         }
1019
1020         priv->is_host_sleep_configured = 0;
1021         priv->is_host_sleep_activated = 0;
1022         wake_up_interruptible(&priv->host_sleep_q);
1023
1024         /* Stop the thread servicing the interrupts */
1025         priv->surpriseremoved = 1;
1026         kthread_stop(priv->main_thread);
1027
1028         lbs_free_adapter(priv);
1029         lbs_cfg_free(priv);
1030         free_netdev(dev);
1031 }
1032 EXPORT_SYMBOL_GPL(lbs_remove_card);
1033
1034
1035 int lbs_rtap_supported(struct lbs_private *priv)
1036 {
1037         if (MRVL_FW_MAJOR_REV(priv->fwrelease) == MRVL_FW_V5)
1038                 return 1;
1039
1040         /* newer firmware use a capability mask */
1041         return ((MRVL_FW_MAJOR_REV(priv->fwrelease) >= MRVL_FW_V10) &&
1042                 (priv->fwcapinfo & MESH_CAPINFO_ENABLE_MASK));
1043 }
1044
1045
1046 int lbs_start_card(struct lbs_private *priv)
1047 {
1048         struct net_device *dev = priv->dev;
1049         int ret;
1050
1051         /* poke the firmware */
1052         ret = lbs_setup_firmware(priv);
1053         if (ret)
1054                 goto done;
1055
1056         if (!lbs_disablemesh)
1057                 lbs_init_mesh(priv);
1058         else
1059                 pr_info("%s: mesh disabled\n", dev->name);
1060
1061         ret = lbs_cfg_register(priv);
1062         if (ret) {
1063                 pr_err("cannot register device\n");
1064                 goto done;
1065         }
1066
1067         if (lbs_mesh_activated(priv))
1068                 lbs_start_mesh(priv);
1069
1070         lbs_debugfs_init_one(priv, dev);
1071
1072         netdev_info(dev, "Marvell WLAN 802.11 adapter\n");
1073
1074         ret = 0;
1075
1076 done:
1077         return ret;
1078 }
1079 EXPORT_SYMBOL_GPL(lbs_start_card);
1080
1081
1082 void lbs_stop_card(struct lbs_private *priv)
1083 {
1084         struct net_device *dev;
1085
1086         if (!priv)
1087                 return;
1088         dev = priv->dev;
1089
1090         /* If the netdev isn't registered, it means that lbs_start_card() was
1091          * never called so we have nothing to do here. */
1092         if (dev->reg_state != NETREG_REGISTERED)
1093                 return;
1094
1095         netif_stop_queue(dev);
1096         netif_carrier_off(dev);
1097
1098         lbs_debugfs_remove_one(priv);
1099         lbs_deinit_mesh(priv);
1100         unregister_netdev(dev);
1101 }
1102 EXPORT_SYMBOL_GPL(lbs_stop_card);
1103
1104
1105 void lbs_queue_event(struct lbs_private *priv, u32 event)
1106 {
1107         unsigned long flags;
1108
1109         spin_lock_irqsave(&priv->driver_lock, flags);
1110
1111         if (priv->psstate == PS_STATE_SLEEP)
1112                 priv->psstate = PS_STATE_AWAKE;
1113
1114         kfifo_in(&priv->event_fifo, (unsigned char *) &event, sizeof(u32));
1115
1116         wake_up(&priv->waitq);
1117
1118         spin_unlock_irqrestore(&priv->driver_lock, flags);
1119 }
1120 EXPORT_SYMBOL_GPL(lbs_queue_event);
1121
1122 void lbs_notify_command_response(struct lbs_private *priv, u8 resp_idx)
1123 {
1124         if (priv->psstate == PS_STATE_SLEEP)
1125                 priv->psstate = PS_STATE_AWAKE;
1126
1127         /* Swap buffers by flipping the response index */
1128         BUG_ON(resp_idx > 1);
1129         priv->resp_idx = resp_idx;
1130
1131         wake_up(&priv->waitq);
1132 }
1133 EXPORT_SYMBOL_GPL(lbs_notify_command_response);
1134
1135 static int __init lbs_init_module(void)
1136 {
1137         memset(&confirm_sleep, 0, sizeof(confirm_sleep));
1138         confirm_sleep.hdr.command = cpu_to_le16(CMD_802_11_PS_MODE);
1139         confirm_sleep.hdr.size = cpu_to_le16(sizeof(confirm_sleep));
1140         confirm_sleep.action = cpu_to_le16(PS_MODE_ACTION_SLEEP_CONFIRMED);
1141         lbs_debugfs_init();
1142
1143         return 0;
1144 }
1145
1146 static void __exit lbs_exit_module(void)
1147 {
1148         lbs_debugfs_remove();
1149 }
1150
1151 module_init(lbs_init_module);
1152 module_exit(lbs_exit_module);
1153
1154 MODULE_DESCRIPTION("Libertas WLAN Driver Library");
1155 MODULE_AUTHOR("Marvell International Ltd.");
1156 MODULE_LICENSE("GPL");