linux/drivers/net/wireless/libertas/main.c
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   1/*
   2 * This file contains the major functions in WLAN
   3 * driver. It includes init, exit, open, close and main
   4 * thread etc..
   5 */
   6
   7#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
   8
   9#include <linux/module.h>
  10#include <linux/delay.h>
  11#include <linux/etherdevice.h>
  12#include <linux/hardirq.h>
  13#include <linux/netdevice.h>
  14#include <linux/if_arp.h>
  15#include <linux/kthread.h>
  16#include <linux/kfifo.h>
  17#include <linux/slab.h>
  18#include <net/cfg80211.h>
  19
  20#include "host.h"
  21#include "decl.h"
  22#include "dev.h"
  23#include "cfg.h"
  24#include "debugfs.h"
  25#include "cmd.h"
  26#include "mesh.h"
  27
  28#define DRIVER_RELEASE_VERSION "323.p0"
  29const char lbs_driver_version[] = "COMM-USB8388-" DRIVER_RELEASE_VERSION
  30#ifdef  DEBUG
  31    "-dbg"
  32#endif
  33    "";
  34
  35
  36/* Module parameters */
  37unsigned int lbs_debug;
  38EXPORT_SYMBOL_GPL(lbs_debug);
  39module_param_named(libertas_debug, lbs_debug, int, 0644);
  40
  41unsigned int lbs_disablemesh;
  42EXPORT_SYMBOL_GPL(lbs_disablemesh);
  43module_param_named(libertas_disablemesh, lbs_disablemesh, int, 0644);
  44
  45
  46/*
  47 * This global structure is used to send the confirm_sleep command as
  48 * fast as possible down to the firmware.
  49 */
  50struct cmd_confirm_sleep confirm_sleep;
  51
  52
  53/*
  54 * the table to keep region code
  55 */
  56u16 lbs_region_code_to_index[MRVDRV_MAX_REGION_CODE] =
  57    { 0x10, 0x20, 0x30, 0x31, 0x32, 0x40 };
  58
  59/*
  60 * FW rate table.  FW refers to rates by their index in this table, not by the
  61 * rate value itself.  Values of 0x00 are
  62 * reserved positions.
  63 */
  64static u8 fw_data_rates[MAX_RATES] =
  65    { 0x02, 0x04, 0x0B, 0x16, 0x00, 0x0C, 0x12,
  66      0x18, 0x24, 0x30, 0x48, 0x60, 0x6C, 0x00
  67};
  68
  69/**
  70 *  lbs_fw_index_to_data_rate - use index to get the data rate
  71 *
  72 *  @idx:       The index of data rate
  73 *  returns:    data rate or 0
  74 */
  75u32 lbs_fw_index_to_data_rate(u8 idx)
  76{
  77        if (idx >= sizeof(fw_data_rates))
  78                idx = 0;
  79        return fw_data_rates[idx];
  80}
  81
  82/**
  83 *  lbs_data_rate_to_fw_index - use rate to get the index
  84 *
  85 *  @rate:      data rate
  86 *  returns:    index or 0
  87 */
  88u8 lbs_data_rate_to_fw_index(u32 rate)
  89{
  90        u8 i;
  91
  92        if (!rate)
  93                return 0;
  94
  95        for (i = 0; i < sizeof(fw_data_rates); i++) {
  96                if (rate == fw_data_rates[i])
  97                        return i;
  98        }
  99        return 0;
 100}
 101
 102int lbs_set_iface_type(struct lbs_private *priv, enum nl80211_iftype type)
 103{
 104        int ret = 0;
 105
 106        switch (type) {
 107        case NL80211_IFTYPE_MONITOR:
 108                ret = lbs_set_monitor_mode(priv, 1);
 109                break;
 110        case NL80211_IFTYPE_STATION:
 111                if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR)
 112                        ret = lbs_set_monitor_mode(priv, 0);
 113                if (!ret)
 114                        ret = lbs_set_snmp_mib(priv, SNMP_MIB_OID_BSS_TYPE, 1);
 115                break;
 116        case NL80211_IFTYPE_ADHOC:
 117                if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR)
 118                        ret = lbs_set_monitor_mode(priv, 0);
 119                if (!ret)
 120                        ret = lbs_set_snmp_mib(priv, SNMP_MIB_OID_BSS_TYPE, 2);
 121                break;
 122        default:
 123                ret = -ENOTSUPP;
 124        }
 125        return ret;
 126}
 127
 128int lbs_start_iface(struct lbs_private *priv)
 129{
 130        struct cmd_ds_802_11_mac_address cmd;
 131        int ret;
 132
 133        if (priv->power_restore) {
 134                ret = priv->power_restore(priv);
 135                if (ret)
 136                        return ret;
 137        }
 138
 139        cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 140        cmd.action = cpu_to_le16(CMD_ACT_SET);
 141        memcpy(cmd.macadd, priv->current_addr, ETH_ALEN);
 142
 143        ret = lbs_cmd_with_response(priv, CMD_802_11_MAC_ADDRESS, &cmd);
 144        if (ret) {
 145                lbs_deb_net("set MAC address failed\n");
 146                goto err;
 147        }
 148
 149        ret = lbs_set_iface_type(priv, priv->wdev->iftype);
 150        if (ret) {
 151                lbs_deb_net("set iface type failed\n");
 152                goto err;
 153        }
 154
 155        ret = lbs_set_11d_domain_info(priv);
 156        if (ret) {
 157                lbs_deb_net("set 11d domain info failed\n");
 158                goto err;
 159        }
 160
 161        lbs_update_channel(priv);
 162
 163        priv->iface_running = true;
 164        return 0;
 165
 166err:
 167        if (priv->power_save)
 168                priv->power_save(priv);
 169        return ret;
 170}
 171
 172/**
 173 *  lbs_dev_open - open the ethX interface
 174 *
 175 *  @dev:       A pointer to &net_device structure
 176 *  returns:    0 or -EBUSY if monitor mode active
 177 */
 178static int lbs_dev_open(struct net_device *dev)
 179{
 180        struct lbs_private *priv = dev->ml_priv;
 181        int ret = 0;
 182
 183        lbs_deb_enter(LBS_DEB_NET);
 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
 199out:
 200        lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
 201        return ret;
 202}
 203
 204static bool lbs_command_queue_empty(struct lbs_private *priv)
 205{
 206        unsigned long flags;
 207        bool ret;
 208        spin_lock_irqsave(&priv->driver_lock, flags);
 209        ret = priv->cur_cmd == NULL && list_empty(&priv->cmdpendingq);
 210        spin_unlock_irqrestore(&priv->driver_lock, flags);
 211        return ret;
 212}
 213
 214int lbs_stop_iface(struct lbs_private *priv)
 215{
 216        unsigned long flags;
 217        int ret = 0;
 218
 219        lbs_deb_enter(LBS_DEB_MAIN);
 220
 221        spin_lock_irqsave(&priv->driver_lock, flags);
 222        priv->iface_running = false;
 223        kfree_skb(priv->currenttxskb);
 224        priv->currenttxskb = NULL;
 225        priv->tx_pending_len = 0;
 226        spin_unlock_irqrestore(&priv->driver_lock, flags);
 227
 228        cancel_work_sync(&priv->mcast_work);
 229        del_timer_sync(&priv->tx_lockup_timer);
 230
 231        /* Disable command processing, and wait for all commands to complete */
 232        lbs_deb_main("waiting for commands to complete\n");
 233        wait_event(priv->waitq, lbs_command_queue_empty(priv));
 234        lbs_deb_main("all commands completed\n");
 235
 236        if (priv->power_save)
 237                ret = priv->power_save(priv);
 238
 239        lbs_deb_leave(LBS_DEB_MAIN);
 240        return ret;
 241}
 242
 243/**
 244 *  lbs_eth_stop - close the ethX interface
 245 *
 246 *  @dev:       A pointer to &net_device structure
 247 *  returns:    0
 248 */
 249static int lbs_eth_stop(struct net_device *dev)
 250{
 251        struct lbs_private *priv = dev->ml_priv;
 252
 253        lbs_deb_enter(LBS_DEB_NET);
 254
 255        if (priv->connect_status == LBS_CONNECTED)
 256                lbs_disconnect(priv, WLAN_REASON_DEAUTH_LEAVING);
 257
 258        spin_lock_irq(&priv->driver_lock);
 259        netif_stop_queue(dev);
 260        spin_unlock_irq(&priv->driver_lock);
 261
 262        lbs_update_mcast(priv);
 263        cancel_delayed_work_sync(&priv->scan_work);
 264        if (priv->scan_req)
 265                lbs_scan_done(priv);
 266
 267        netif_carrier_off(priv->dev);
 268
 269        if (!lbs_iface_active(priv))
 270                lbs_stop_iface(priv);
 271
 272        lbs_deb_leave(LBS_DEB_NET);
 273        return 0;
 274}
 275
 276void lbs_host_to_card_done(struct lbs_private *priv)
 277{
 278        unsigned long flags;
 279
 280        lbs_deb_enter(LBS_DEB_THREAD);
 281
 282        spin_lock_irqsave(&priv->driver_lock, flags);
 283        del_timer(&priv->tx_lockup_timer);
 284
 285        priv->dnld_sent = DNLD_RES_RECEIVED;
 286
 287        /* Wake main thread if commands are pending */
 288        if (!priv->cur_cmd || priv->tx_pending_len > 0) {
 289                if (!priv->wakeup_dev_required)
 290                        wake_up(&priv->waitq);
 291        }
 292
 293        spin_unlock_irqrestore(&priv->driver_lock, flags);
 294        lbs_deb_leave(LBS_DEB_THREAD);
 295}
 296EXPORT_SYMBOL_GPL(lbs_host_to_card_done);
 297
 298int lbs_set_mac_address(struct net_device *dev, void *addr)
 299{
 300        int ret = 0;
 301        struct lbs_private *priv = dev->ml_priv;
 302        struct sockaddr *phwaddr = addr;
 303
 304        lbs_deb_enter(LBS_DEB_NET);
 305
 306        /*
 307         * Can only set MAC address when all interfaces are down, to be written
 308         * to the hardware when one of them is brought up.
 309         */
 310        if (lbs_iface_active(priv))
 311                return -EBUSY;
 312
 313        /* In case it was called from the mesh device */
 314        dev = priv->dev;
 315
 316        memcpy(priv->current_addr, phwaddr->sa_data, ETH_ALEN);
 317        memcpy(dev->dev_addr, phwaddr->sa_data, ETH_ALEN);
 318        if (priv->mesh_dev)
 319                memcpy(priv->mesh_dev->dev_addr, phwaddr->sa_data, ETH_ALEN);
 320
 321        lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
 322        return ret;
 323}
 324
 325
 326static inline int mac_in_list(unsigned char *list, int list_len,
 327                              unsigned char *mac)
 328{
 329        while (list_len) {
 330                if (!memcmp(list, mac, ETH_ALEN))
 331                        return 1;
 332                list += ETH_ALEN;
 333                list_len--;
 334        }
 335        return 0;
 336}
 337
 338
 339static int lbs_add_mcast_addrs(struct cmd_ds_mac_multicast_adr *cmd,
 340                               struct net_device *dev, int nr_addrs)
 341{
 342        int i = nr_addrs;
 343        struct netdev_hw_addr *ha;
 344        int cnt;
 345
 346        if ((dev->flags & (IFF_UP|IFF_MULTICAST)) != (IFF_UP|IFF_MULTICAST))
 347                return nr_addrs;
 348
 349        netif_addr_lock_bh(dev);
 350        cnt = netdev_mc_count(dev);
 351        netdev_for_each_mc_addr(ha, dev) {
 352                if (mac_in_list(cmd->maclist, nr_addrs, ha->addr)) {
 353                        lbs_deb_net("mcast address %s:%pM skipped\n", dev->name,
 354                                    ha->addr);
 355                        cnt--;
 356                        continue;
 357                }
 358
 359                if (i == MRVDRV_MAX_MULTICAST_LIST_SIZE)
 360                        break;
 361                memcpy(&cmd->maclist[6*i], ha->addr, ETH_ALEN);
 362                lbs_deb_net("mcast address %s:%pM added to filter\n", dev->name,
 363                            ha->addr);
 364                i++;
 365                cnt--;
 366        }
 367        netif_addr_unlock_bh(dev);
 368        if (cnt)
 369                return -EOVERFLOW;
 370
 371        return i;
 372}
 373
 374void lbs_update_mcast(struct lbs_private *priv)
 375{
 376        struct cmd_ds_mac_multicast_adr mcast_cmd;
 377        int dev_flags = 0;
 378        int nr_addrs;
 379        int old_mac_control = priv->mac_control;
 380
 381        lbs_deb_enter(LBS_DEB_NET);
 382
 383        if (netif_running(priv->dev))
 384                dev_flags |= priv->dev->flags;
 385        if (priv->mesh_dev && netif_running(priv->mesh_dev))
 386                dev_flags |= priv->mesh_dev->flags;
 387
 388        if (dev_flags & IFF_PROMISC) {
 389                priv->mac_control |= CMD_ACT_MAC_PROMISCUOUS_ENABLE;
 390                priv->mac_control &= ~(CMD_ACT_MAC_ALL_MULTICAST_ENABLE |
 391                                       CMD_ACT_MAC_MULTICAST_ENABLE);
 392                goto out_set_mac_control;
 393        } else if (dev_flags & IFF_ALLMULTI) {
 394        do_allmulti:
 395                priv->mac_control |= CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
 396                priv->mac_control &= ~(CMD_ACT_MAC_PROMISCUOUS_ENABLE |
 397                                       CMD_ACT_MAC_MULTICAST_ENABLE);
 398                goto out_set_mac_control;
 399        }
 400
 401        /* Once for priv->dev, again for priv->mesh_dev if it exists */
 402        nr_addrs = lbs_add_mcast_addrs(&mcast_cmd, priv->dev, 0);
 403        if (nr_addrs >= 0 && priv->mesh_dev)
 404                nr_addrs = lbs_add_mcast_addrs(&mcast_cmd, priv->mesh_dev, nr_addrs);
 405        if (nr_addrs < 0)
 406                goto do_allmulti;
 407
 408        if (nr_addrs) {
 409                int size = offsetof(struct cmd_ds_mac_multicast_adr,
 410                                    maclist[6*nr_addrs]);
 411
 412                mcast_cmd.action = cpu_to_le16(CMD_ACT_SET);
 413                mcast_cmd.hdr.size = cpu_to_le16(size);
 414                mcast_cmd.nr_of_adrs = cpu_to_le16(nr_addrs);
 415
 416                lbs_cmd_async(priv, CMD_MAC_MULTICAST_ADR, &mcast_cmd.hdr, size);
 417
 418                priv->mac_control |= CMD_ACT_MAC_MULTICAST_ENABLE;
 419        } else
 420                priv->mac_control &= ~CMD_ACT_MAC_MULTICAST_ENABLE;
 421
 422        priv->mac_control &= ~(CMD_ACT_MAC_PROMISCUOUS_ENABLE |
 423                               CMD_ACT_MAC_ALL_MULTICAST_ENABLE);
 424 out_set_mac_control:
 425        if (priv->mac_control != old_mac_control)
 426                lbs_set_mac_control(priv);
 427
 428        lbs_deb_leave(LBS_DEB_NET);
 429}
 430
 431static void lbs_set_mcast_worker(struct work_struct *work)
 432{
 433        struct lbs_private *priv = container_of(work, struct lbs_private, mcast_work);
 434        lbs_update_mcast(priv);
 435}
 436
 437void lbs_set_multicast_list(struct net_device *dev)
 438{
 439        struct lbs_private *priv = dev->ml_priv;
 440
 441        schedule_work(&priv->mcast_work);
 442}
 443
 444/**
 445 *  lbs_thread - handles the major jobs in the LBS driver.
 446 *  It handles all events generated by firmware, RX data received
 447 *  from firmware and TX data sent from kernel.
 448 *
 449 *  @data:      A pointer to &lbs_thread structure
 450 *  returns:    0
 451 */
 452static int lbs_thread(void *data)
 453{
 454        struct net_device *dev = data;
 455        struct lbs_private *priv = dev->ml_priv;
 456        wait_queue_t wait;
 457
 458        lbs_deb_enter(LBS_DEB_THREAD);
 459
 460        init_waitqueue_entry(&wait, current);
 461
 462        for (;;) {
 463                int shouldsleep;
 464                u8 resp_idx;
 465
 466                lbs_deb_thread("1: currenttxskb %p, dnld_sent %d\n",
 467                                priv->currenttxskb, priv->dnld_sent);
 468
 469                add_wait_queue(&priv->waitq, &wait);
 470                set_current_state(TASK_INTERRUPTIBLE);
 471                spin_lock_irq(&priv->driver_lock);
 472
 473                if (kthread_should_stop())
 474                        shouldsleep = 0;        /* Bye */
 475                else if (priv->surpriseremoved)
 476                        shouldsleep = 1;        /* We need to wait until we're _told_ to die */
 477                else if (priv->psstate == PS_STATE_SLEEP)
 478                        shouldsleep = 1;        /* Sleep mode. Nothing we can do till it wakes */
 479                else if (priv->cmd_timed_out)
 480                        shouldsleep = 0;        /* Command timed out. Recover */
 481                else if (!priv->fw_ready)
 482                        shouldsleep = 1;        /* Firmware not ready. We're waiting for it */
 483                else if (priv->dnld_sent)
 484                        shouldsleep = 1;        /* Something is en route to the device already */
 485                else if (priv->tx_pending_len > 0)
 486                        shouldsleep = 0;        /* We've a packet to send */
 487                else if (priv->resp_len[priv->resp_idx])
 488                        shouldsleep = 0;        /* We have a command response */
 489                else if (priv->cur_cmd)
 490                        shouldsleep = 1;        /* Can't send a command; one already running */
 491                else if (!list_empty(&priv->cmdpendingq) &&
 492                                        !(priv->wakeup_dev_required))
 493                        shouldsleep = 0;        /* We have a command to send */
 494                else if (kfifo_len(&priv->event_fifo))
 495                        shouldsleep = 0;        /* We have an event to process */
 496                else
 497                        shouldsleep = 1;        /* No command */
 498
 499                if (shouldsleep) {
 500                        lbs_deb_thread("sleeping, connect_status %d, "
 501                                "psmode %d, psstate %d\n",
 502                                priv->connect_status,
 503                                priv->psmode, priv->psstate);
 504                        spin_unlock_irq(&priv->driver_lock);
 505                        schedule();
 506                } else
 507                        spin_unlock_irq(&priv->driver_lock);
 508
 509                lbs_deb_thread("2: currenttxskb %p, dnld_send %d\n",
 510                               priv->currenttxskb, priv->dnld_sent);
 511
 512                set_current_state(TASK_RUNNING);
 513                remove_wait_queue(&priv->waitq, &wait);
 514
 515                lbs_deb_thread("3: currenttxskb %p, dnld_sent %d\n",
 516                               priv->currenttxskb, priv->dnld_sent);
 517
 518                if (kthread_should_stop()) {
 519                        lbs_deb_thread("break from main thread\n");
 520                        break;
 521                }
 522
 523                if (priv->surpriseremoved) {
 524                        lbs_deb_thread("adapter removed; waiting to die...\n");
 525                        continue;
 526                }
 527
 528                lbs_deb_thread("4: currenttxskb %p, dnld_sent %d\n",
 529                       priv->currenttxskb, priv->dnld_sent);
 530
 531                /* Process any pending command response */
 532                spin_lock_irq(&priv->driver_lock);
 533                resp_idx = priv->resp_idx;
 534                if (priv->resp_len[resp_idx]) {
 535                        spin_unlock_irq(&priv->driver_lock);
 536                        lbs_process_command_response(priv,
 537                                priv->resp_buf[resp_idx],
 538                                priv->resp_len[resp_idx]);
 539                        spin_lock_irq(&priv->driver_lock);
 540                        priv->resp_len[resp_idx] = 0;
 541                }
 542                spin_unlock_irq(&priv->driver_lock);
 543
 544                /* Process hardware events, e.g. card removed, link lost */
 545                spin_lock_irq(&priv->driver_lock);
 546                while (kfifo_len(&priv->event_fifo)) {
 547                        u32 event;
 548
 549                        if (kfifo_out(&priv->event_fifo,
 550                                (unsigned char *) &event, sizeof(event)) !=
 551                                sizeof(event))
 552                                        break;
 553                        spin_unlock_irq(&priv->driver_lock);
 554                        lbs_process_event(priv, event);
 555                        spin_lock_irq(&priv->driver_lock);
 556                }
 557                spin_unlock_irq(&priv->driver_lock);
 558
 559                if (priv->wakeup_dev_required) {
 560                        lbs_deb_thread("Waking up device...\n");
 561                        /* Wake up device */
 562                        if (priv->exit_deep_sleep(priv))
 563                                lbs_deb_thread("Wakeup device failed\n");
 564                        continue;
 565                }
 566
 567                /* command timeout stuff */
 568                if (priv->cmd_timed_out && priv->cur_cmd) {
 569                        struct cmd_ctrl_node *cmdnode = priv->cur_cmd;
 570
 571                        netdev_info(dev, "Timeout submitting command 0x%04x\n",
 572                                    le16_to_cpu(cmdnode->cmdbuf->command));
 573                        lbs_complete_command(priv, cmdnode, -ETIMEDOUT);
 574
 575                        /* Reset card, but only when it isn't in the process
 576                         * of being shutdown anyway. */
 577                        if (!dev->dismantle && priv->reset_card)
 578                                priv->reset_card(priv);
 579                }
 580                priv->cmd_timed_out = 0;
 581
 582                if (!priv->fw_ready)
 583                        continue;
 584
 585                /* Check if we need to confirm Sleep Request received previously */
 586                if (priv->psstate == PS_STATE_PRE_SLEEP &&
 587                    !priv->dnld_sent && !priv->cur_cmd) {
 588                        if (priv->connect_status == LBS_CONNECTED) {
 589                                lbs_deb_thread("pre-sleep, currenttxskb %p, "
 590                                        "dnld_sent %d, cur_cmd %p\n",
 591                                        priv->currenttxskb, priv->dnld_sent,
 592                                        priv->cur_cmd);
 593
 594                                lbs_ps_confirm_sleep(priv);
 595                        } else {
 596                                /* workaround for firmware sending
 597                                 * deauth/linkloss event immediately
 598                                 * after sleep request; remove this
 599                                 * after firmware fixes it
 600                                 */
 601                                priv->psstate = PS_STATE_AWAKE;
 602                                netdev_alert(dev,
 603                                             "ignore PS_SleepConfirm in non-connected state\n");
 604                        }
 605                }
 606
 607                /* The PS state is changed during processing of Sleep Request
 608                 * event above
 609                 */
 610                if ((priv->psstate == PS_STATE_SLEEP) ||
 611                    (priv->psstate == PS_STATE_PRE_SLEEP))
 612                        continue;
 613
 614                if (priv->is_deep_sleep)
 615                        continue;
 616
 617                /* Execute the next command */
 618                if (!priv->dnld_sent && !priv->cur_cmd)
 619                        lbs_execute_next_command(priv);
 620
 621                spin_lock_irq(&priv->driver_lock);
 622                if (!priv->dnld_sent && priv->tx_pending_len > 0) {
 623                        int ret = priv->hw_host_to_card(priv, MVMS_DAT,
 624                                                        priv->tx_pending_buf,
 625                                                        priv->tx_pending_len);
 626                        if (ret) {
 627                                lbs_deb_tx("host_to_card failed %d\n", ret);
 628                                priv->dnld_sent = DNLD_RES_RECEIVED;
 629                        } else {
 630                                mod_timer(&priv->tx_lockup_timer,
 631                                          jiffies + (HZ * 5));
 632                        }
 633                        priv->tx_pending_len = 0;
 634                        if (!priv->currenttxskb) {
 635                                /* We can wake the queues immediately if we aren't
 636                                   waiting for TX feedback */
 637                                if (priv->connect_status == LBS_CONNECTED)
 638                                        netif_wake_queue(priv->dev);
 639                                if (priv->mesh_dev &&
 640                                    netif_running(priv->mesh_dev))
 641                                        netif_wake_queue(priv->mesh_dev);
 642                        }
 643                }
 644                spin_unlock_irq(&priv->driver_lock);
 645        }
 646
 647        del_timer(&priv->command_timer);
 648        del_timer(&priv->tx_lockup_timer);
 649        del_timer(&priv->auto_deepsleep_timer);
 650
 651        lbs_deb_leave(LBS_DEB_THREAD);
 652        return 0;
 653}
 654
 655/**
 656 * lbs_setup_firmware - gets the HW spec from the firmware and sets
 657 *        some basic parameters
 658 *
 659 *  @priv:      A pointer to &struct lbs_private structure
 660 *  returns:    0 or -1
 661 */
 662static int lbs_setup_firmware(struct lbs_private *priv)
 663{
 664        int ret = -1;
 665        s16 curlevel = 0, minlevel = 0, maxlevel = 0;
 666
 667        lbs_deb_enter(LBS_DEB_FW);
 668
 669        /* Read MAC address from firmware */
 670        eth_broadcast_addr(priv->current_addr);
 671        ret = lbs_update_hw_spec(priv);
 672        if (ret)
 673                goto done;
 674
 675        /* Read power levels if available */
 676        ret = lbs_get_tx_power(priv, &curlevel, &minlevel, &maxlevel);
 677        if (ret == 0) {
 678                priv->txpower_cur = curlevel;
 679                priv->txpower_min = minlevel;
 680                priv->txpower_max = maxlevel;
 681        }
 682
 683        /* Send cmd to FW to enable 11D function */
 684        ret = lbs_set_snmp_mib(priv, SNMP_MIB_OID_11D_ENABLE, 1);
 685        if (ret)
 686                goto done;
 687
 688        ret = lbs_set_mac_control_sync(priv);
 689done:
 690        lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret);
 691        return ret;
 692}
 693
 694int lbs_suspend(struct lbs_private *priv)
 695{
 696        int ret;
 697
 698        lbs_deb_enter(LBS_DEB_FW);
 699
 700        if (priv->is_deep_sleep) {
 701                ret = lbs_set_deep_sleep(priv, 0);
 702                if (ret) {
 703                        netdev_err(priv->dev,
 704                                   "deep sleep cancellation failed: %d\n", ret);
 705                        return ret;
 706                }
 707                priv->deep_sleep_required = 1;
 708        }
 709
 710        ret = lbs_set_host_sleep(priv, 1);
 711
 712        netif_device_detach(priv->dev);
 713        if (priv->mesh_dev)
 714                netif_device_detach(priv->mesh_dev);
 715
 716        lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret);
 717        return ret;
 718}
 719EXPORT_SYMBOL_GPL(lbs_suspend);
 720
 721int lbs_resume(struct lbs_private *priv)
 722{
 723        int ret;
 724
 725        lbs_deb_enter(LBS_DEB_FW);
 726
 727        ret = lbs_set_host_sleep(priv, 0);
 728
 729        netif_device_attach(priv->dev);
 730        if (priv->mesh_dev)
 731                netif_device_attach(priv->mesh_dev);
 732
 733        if (priv->deep_sleep_required) {
 734                priv->deep_sleep_required = 0;
 735                ret = lbs_set_deep_sleep(priv, 1);
 736                if (ret)
 737                        netdev_err(priv->dev,
 738                                   "deep sleep activation failed: %d\n", ret);
 739        }
 740
 741        if (priv->setup_fw_on_resume)
 742                ret = lbs_setup_firmware(priv);
 743
 744        lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret);
 745        return ret;
 746}
 747EXPORT_SYMBOL_GPL(lbs_resume);
 748
 749/**
 750 * lbs_cmd_timeout_handler - handles the timeout of command sending.
 751 * It will re-send the same command again.
 752 *
 753 * @data: &struct lbs_private pointer
 754 */
 755static void lbs_cmd_timeout_handler(unsigned long data)
 756{
 757        struct lbs_private *priv = (struct lbs_private *)data;
 758        unsigned long flags;
 759
 760        lbs_deb_enter(LBS_DEB_CMD);
 761        spin_lock_irqsave(&priv->driver_lock, flags);
 762
 763        if (!priv->cur_cmd)
 764                goto out;
 765
 766        netdev_info(priv->dev, "command 0x%04x timed out\n",
 767                    le16_to_cpu(priv->cur_cmd->cmdbuf->command));
 768
 769        priv->cmd_timed_out = 1;
 770
 771        /*
 772         * If the device didn't even acknowledge the command, reset the state
 773         * so that we don't block all future commands due to this one timeout.
 774         */
 775        if (priv->dnld_sent == DNLD_CMD_SENT)
 776                priv->dnld_sent = DNLD_RES_RECEIVED;
 777
 778        wake_up(&priv->waitq);
 779out:
 780        spin_unlock_irqrestore(&priv->driver_lock, flags);
 781        lbs_deb_leave(LBS_DEB_CMD);
 782}
 783
 784/**
 785 * lbs_tx_lockup_handler - handles the timeout of the passing of TX frames
 786 * to the hardware. This is known to frequently happen with SD8686 when
 787 * waking up after a Wake-on-WLAN-triggered resume.
 788 *
 789 * @data: &struct lbs_private pointer
 790 */
 791static void lbs_tx_lockup_handler(unsigned long data)
 792{
 793        struct lbs_private *priv = (struct lbs_private *)data;
 794        unsigned long flags;
 795
 796        lbs_deb_enter(LBS_DEB_TX);
 797        spin_lock_irqsave(&priv->driver_lock, flags);
 798
 799        netdev_info(priv->dev, "TX lockup detected\n");
 800        if (priv->reset_card)
 801                priv->reset_card(priv);
 802
 803        priv->dnld_sent = DNLD_RES_RECEIVED;
 804        wake_up_interruptible(&priv->waitq);
 805
 806        spin_unlock_irqrestore(&priv->driver_lock, flags);
 807        lbs_deb_leave(LBS_DEB_TX);
 808}
 809
 810/**
 811 * auto_deepsleep_timer_fn - put the device back to deep sleep mode when
 812 * timer expires and no activity (command, event, data etc.) is detected.
 813 * @data:       &struct lbs_private pointer
 814 * returns:     N/A
 815 */
 816static void auto_deepsleep_timer_fn(unsigned long data)
 817{
 818        struct lbs_private *priv = (struct lbs_private *)data;
 819
 820        lbs_deb_enter(LBS_DEB_CMD);
 821
 822        if (priv->is_activity_detected) {
 823                priv->is_activity_detected = 0;
 824        } else {
 825                if (priv->is_auto_deep_sleep_enabled &&
 826                    (!priv->wakeup_dev_required) &&
 827                    (priv->connect_status != LBS_CONNECTED)) {
 828                        struct cmd_header cmd;
 829
 830                        lbs_deb_main("Entering auto deep sleep mode...\n");
 831                        memset(&cmd, 0, sizeof(cmd));
 832                        cmd.size = cpu_to_le16(sizeof(cmd));
 833                        lbs_cmd_async(priv, CMD_802_11_DEEP_SLEEP, &cmd,
 834                                        sizeof(cmd));
 835                }
 836        }
 837        mod_timer(&priv->auto_deepsleep_timer , jiffies +
 838                                (priv->auto_deep_sleep_timeout * HZ)/1000);
 839        lbs_deb_leave(LBS_DEB_CMD);
 840}
 841
 842int lbs_enter_auto_deep_sleep(struct lbs_private *priv)
 843{
 844        lbs_deb_enter(LBS_DEB_SDIO);
 845
 846        priv->is_auto_deep_sleep_enabled = 1;
 847        if (priv->is_deep_sleep)
 848                priv->wakeup_dev_required = 1;
 849        mod_timer(&priv->auto_deepsleep_timer ,
 850                        jiffies + (priv->auto_deep_sleep_timeout * HZ)/1000);
 851
 852        lbs_deb_leave(LBS_DEB_SDIO);
 853        return 0;
 854}
 855
 856int lbs_exit_auto_deep_sleep(struct lbs_private *priv)
 857{
 858        lbs_deb_enter(LBS_DEB_SDIO);
 859
 860        priv->is_auto_deep_sleep_enabled = 0;
 861        priv->auto_deep_sleep_timeout = 0;
 862        del_timer(&priv->auto_deepsleep_timer);
 863
 864        lbs_deb_leave(LBS_DEB_SDIO);
 865        return 0;
 866}
 867
 868static int lbs_init_adapter(struct lbs_private *priv)
 869{
 870        int ret;
 871
 872        lbs_deb_enter(LBS_DEB_MAIN);
 873
 874        eth_broadcast_addr(priv->current_addr);
 875
 876        priv->connect_status = LBS_DISCONNECTED;
 877        priv->channel = DEFAULT_AD_HOC_CHANNEL;
 878        priv->mac_control = CMD_ACT_MAC_RX_ON | CMD_ACT_MAC_TX_ON;
 879        priv->radio_on = 1;
 880        priv->psmode = LBS802_11POWERMODECAM;
 881        priv->psstate = PS_STATE_FULL_POWER;
 882        priv->is_deep_sleep = 0;
 883        priv->is_auto_deep_sleep_enabled = 0;
 884        priv->deep_sleep_required = 0;
 885        priv->wakeup_dev_required = 0;
 886        init_waitqueue_head(&priv->ds_awake_q);
 887        init_waitqueue_head(&priv->scan_q);
 888        priv->authtype_auto = 1;
 889        priv->is_host_sleep_configured = 0;
 890        priv->is_host_sleep_activated = 0;
 891        init_waitqueue_head(&priv->host_sleep_q);
 892        init_waitqueue_head(&priv->fw_waitq);
 893        mutex_init(&priv->lock);
 894
 895        setup_timer(&priv->command_timer, lbs_cmd_timeout_handler,
 896                (unsigned long)priv);
 897        setup_timer(&priv->tx_lockup_timer, lbs_tx_lockup_handler,
 898                (unsigned long)priv);
 899        setup_timer(&priv->auto_deepsleep_timer, auto_deepsleep_timer_fn,
 900                        (unsigned long)priv);
 901
 902        INIT_LIST_HEAD(&priv->cmdfreeq);
 903        INIT_LIST_HEAD(&priv->cmdpendingq);
 904
 905        spin_lock_init(&priv->driver_lock);
 906
 907        /* Allocate the command buffers */
 908        if (lbs_allocate_cmd_buffer(priv)) {
 909                pr_err("Out of memory allocating command buffers\n");
 910                ret = -ENOMEM;
 911                goto out;
 912        }
 913        priv->resp_idx = 0;
 914        priv->resp_len[0] = priv->resp_len[1] = 0;
 915
 916        /* Create the event FIFO */
 917        ret = kfifo_alloc(&priv->event_fifo, sizeof(u32) * 16, GFP_KERNEL);
 918        if (ret) {
 919                pr_err("Out of memory allocating event FIFO buffer\n");
 920                goto out;
 921        }
 922
 923out:
 924        lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
 925
 926        return ret;
 927}
 928
 929static void lbs_free_adapter(struct lbs_private *priv)
 930{
 931        lbs_deb_enter(LBS_DEB_MAIN);
 932
 933        lbs_free_cmd_buffer(priv);
 934        kfifo_free(&priv->event_fifo);
 935        del_timer(&priv->command_timer);
 936        del_timer(&priv->tx_lockup_timer);
 937        del_timer(&priv->auto_deepsleep_timer);
 938
 939        lbs_deb_leave(LBS_DEB_MAIN);
 940}
 941
 942static const struct net_device_ops lbs_netdev_ops = {
 943        .ndo_open               = lbs_dev_open,
 944        .ndo_stop               = lbs_eth_stop,
 945        .ndo_start_xmit         = lbs_hard_start_xmit,
 946        .ndo_set_mac_address    = lbs_set_mac_address,
 947        .ndo_set_rx_mode        = lbs_set_multicast_list,
 948        .ndo_change_mtu         = eth_change_mtu,
 949        .ndo_validate_addr      = eth_validate_addr,
 950};
 951
 952/**
 953 * lbs_add_card - adds the card. It will probe the
 954 * card, allocate the lbs_priv and initialize the device.
 955 *
 956 * @card:       A pointer to card
 957 * @dmdev:      A pointer to &struct device
 958 * returns:     A pointer to &struct lbs_private structure
 959 */
 960struct lbs_private *lbs_add_card(void *card, struct device *dmdev)
 961{
 962        struct net_device *dev;
 963        struct wireless_dev *wdev;
 964        struct lbs_private *priv = NULL;
 965
 966        lbs_deb_enter(LBS_DEB_MAIN);
 967
 968        /* Allocate an Ethernet device and register it */
 969        wdev = lbs_cfg_alloc(dmdev);
 970        if (IS_ERR(wdev)) {
 971                pr_err("cfg80211 init failed\n");
 972                goto done;
 973        }
 974
 975        wdev->iftype = NL80211_IFTYPE_STATION;
 976        priv = wdev_priv(wdev);
 977        priv->wdev = wdev;
 978
 979        if (lbs_init_adapter(priv)) {
 980                pr_err("failed to initialize adapter structure\n");
 981                goto err_wdev;
 982        }
 983
 984        dev = alloc_netdev(0, "wlan%d", NET_NAME_UNKNOWN, ether_setup);
 985        if (!dev) {
 986                dev_err(dmdev, "no memory for network device instance\n");
 987                goto err_adapter;
 988        }
 989
 990        dev->ieee80211_ptr = wdev;
 991        dev->ml_priv = priv;
 992        SET_NETDEV_DEV(dev, dmdev);
 993        wdev->netdev = dev;
 994        priv->dev = dev;
 995
 996        dev->netdev_ops = &lbs_netdev_ops;
 997        dev->watchdog_timeo = 5 * HZ;
 998        dev->ethtool_ops = &lbs_ethtool_ops;
 999        dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
1000
1001        priv->card = card;
1002
1003        strcpy(dev->name, "wlan%d");
1004
1005        lbs_deb_thread("Starting main thread...\n");
1006        init_waitqueue_head(&priv->waitq);
1007        priv->main_thread = kthread_run(lbs_thread, dev, "lbs_main");
1008        if (IS_ERR(priv->main_thread)) {
1009                lbs_deb_thread("Error creating main thread.\n");
1010                goto err_ndev;
1011        }
1012
1013        priv->work_thread = create_singlethread_workqueue("lbs_worker");
1014        INIT_WORK(&priv->mcast_work, lbs_set_mcast_worker);
1015
1016        priv->wol_criteria = EHS_REMOVE_WAKEUP;
1017        priv->wol_gpio = 0xff;
1018        priv->wol_gap = 20;
1019        priv->ehs_remove_supported = true;
1020
1021        goto done;
1022
1023 err_ndev:
1024        free_netdev(dev);
1025
1026 err_adapter:
1027        lbs_free_adapter(priv);
1028
1029 err_wdev:
1030        lbs_cfg_free(priv);
1031
1032        priv = NULL;
1033
1034done:
1035        lbs_deb_leave_args(LBS_DEB_MAIN, "priv %p", priv);
1036        return priv;
1037}
1038EXPORT_SYMBOL_GPL(lbs_add_card);
1039
1040
1041void lbs_remove_card(struct lbs_private *priv)
1042{
1043        struct net_device *dev = priv->dev;
1044
1045        lbs_deb_enter(LBS_DEB_MAIN);
1046
1047        lbs_remove_mesh(priv);
1048
1049        if (priv->wiphy_registered)
1050                lbs_scan_deinit(priv);
1051
1052        lbs_wait_for_firmware_load(priv);
1053
1054        /* worker thread destruction blocks on the in-flight command which
1055         * should have been cleared already in lbs_stop_card().
1056         */
1057        lbs_deb_main("destroying worker thread\n");
1058        destroy_workqueue(priv->work_thread);
1059        lbs_deb_main("done destroying worker thread\n");
1060
1061        if (priv->psmode == LBS802_11POWERMODEMAX_PSP) {
1062                priv->psmode = LBS802_11POWERMODECAM;
1063                lbs_set_ps_mode(priv, PS_MODE_ACTION_EXIT_PS, true);
1064        }
1065
1066        if (priv->is_deep_sleep) {
1067                priv->is_deep_sleep = 0;
1068                wake_up_interruptible(&priv->ds_awake_q);
1069        }
1070
1071        priv->is_host_sleep_configured = 0;
1072        priv->is_host_sleep_activated = 0;
1073        wake_up_interruptible(&priv->host_sleep_q);
1074
1075        /* Stop the thread servicing the interrupts */
1076        priv->surpriseremoved = 1;
1077        kthread_stop(priv->main_thread);
1078
1079        lbs_free_adapter(priv);
1080        lbs_cfg_free(priv);
1081        free_netdev(dev);
1082
1083        lbs_deb_leave(LBS_DEB_MAIN);
1084}
1085EXPORT_SYMBOL_GPL(lbs_remove_card);
1086
1087
1088int lbs_rtap_supported(struct lbs_private *priv)
1089{
1090        if (MRVL_FW_MAJOR_REV(priv->fwrelease) == MRVL_FW_V5)
1091                return 1;
1092
1093        /* newer firmware use a capability mask */
1094        return ((MRVL_FW_MAJOR_REV(priv->fwrelease) >= MRVL_FW_V10) &&
1095                (priv->fwcapinfo & MESH_CAPINFO_ENABLE_MASK));
1096}
1097
1098
1099int lbs_start_card(struct lbs_private *priv)
1100{
1101        struct net_device *dev = priv->dev;
1102        int ret = -1;
1103
1104        lbs_deb_enter(LBS_DEB_MAIN);
1105
1106        /* poke the firmware */
1107        ret = lbs_setup_firmware(priv);
1108        if (ret)
1109                goto done;
1110
1111        if (!lbs_disablemesh)
1112                lbs_init_mesh(priv);
1113        else
1114                pr_info("%s: mesh disabled\n", dev->name);
1115
1116        if (lbs_cfg_register(priv)) {
1117                pr_err("cannot register device\n");
1118                goto done;
1119        }
1120
1121        if (lbs_mesh_activated(priv))
1122                lbs_start_mesh(priv);
1123
1124        lbs_debugfs_init_one(priv, dev);
1125
1126        netdev_info(dev, "Marvell WLAN 802.11 adapter\n");
1127
1128        ret = 0;
1129
1130done:
1131        lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
1132        return ret;
1133}
1134EXPORT_SYMBOL_GPL(lbs_start_card);
1135
1136
1137void lbs_stop_card(struct lbs_private *priv)
1138{
1139        struct net_device *dev;
1140
1141        lbs_deb_enter(LBS_DEB_MAIN);
1142
1143        if (!priv)
1144                goto out;
1145        dev = priv->dev;
1146
1147        /* If the netdev isn't registered, it means that lbs_start_card() was
1148         * never called so we have nothing to do here. */
1149        if (dev->reg_state != NETREG_REGISTERED)
1150                goto out;
1151
1152        netif_stop_queue(dev);
1153        netif_carrier_off(dev);
1154
1155        lbs_debugfs_remove_one(priv);
1156        lbs_deinit_mesh(priv);
1157        unregister_netdev(dev);
1158
1159out:
1160        lbs_deb_leave(LBS_DEB_MAIN);
1161}
1162EXPORT_SYMBOL_GPL(lbs_stop_card);
1163
1164
1165void lbs_queue_event(struct lbs_private *priv, u32 event)
1166{
1167        unsigned long flags;
1168
1169        lbs_deb_enter(LBS_DEB_THREAD);
1170        spin_lock_irqsave(&priv->driver_lock, flags);
1171
1172        if (priv->psstate == PS_STATE_SLEEP)
1173                priv->psstate = PS_STATE_AWAKE;
1174
1175        kfifo_in(&priv->event_fifo, (unsigned char *) &event, sizeof(u32));
1176
1177        wake_up(&priv->waitq);
1178
1179        spin_unlock_irqrestore(&priv->driver_lock, flags);
1180        lbs_deb_leave(LBS_DEB_THREAD);
1181}
1182EXPORT_SYMBOL_GPL(lbs_queue_event);
1183
1184void lbs_notify_command_response(struct lbs_private *priv, u8 resp_idx)
1185{
1186        lbs_deb_enter(LBS_DEB_THREAD);
1187
1188        if (priv->psstate == PS_STATE_SLEEP)
1189                priv->psstate = PS_STATE_AWAKE;
1190
1191        /* Swap buffers by flipping the response index */
1192        BUG_ON(resp_idx > 1);
1193        priv->resp_idx = resp_idx;
1194
1195        wake_up(&priv->waitq);
1196
1197        lbs_deb_leave(LBS_DEB_THREAD);
1198}
1199EXPORT_SYMBOL_GPL(lbs_notify_command_response);
1200
1201static int __init lbs_init_module(void)
1202{
1203        lbs_deb_enter(LBS_DEB_MAIN);
1204        memset(&confirm_sleep, 0, sizeof(confirm_sleep));
1205        confirm_sleep.hdr.command = cpu_to_le16(CMD_802_11_PS_MODE);
1206        confirm_sleep.hdr.size = cpu_to_le16(sizeof(confirm_sleep));
1207        confirm_sleep.action = cpu_to_le16(PS_MODE_ACTION_SLEEP_CONFIRMED);
1208        lbs_debugfs_init();
1209        lbs_deb_leave(LBS_DEB_MAIN);
1210        return 0;
1211}
1212
1213static void __exit lbs_exit_module(void)
1214{
1215        lbs_deb_enter(LBS_DEB_MAIN);
1216        lbs_debugfs_remove();
1217        lbs_deb_leave(LBS_DEB_MAIN);
1218}
1219
1220module_init(lbs_init_module);
1221module_exit(lbs_exit_module);
1222
1223MODULE_DESCRIPTION("Libertas WLAN Driver Library");
1224MODULE_AUTHOR("Marvell International Ltd.");
1225MODULE_LICENSE("GPL");
1226