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OSCL-LXR
 
 

     

0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /*
0003  * This file contains the major functions in WLAN
0004  * driver. It includes init, exit, open, close and main
0005  * thread etc..
0006  */
0007 
0008 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
0009 
0010 #include <linux/module.h>
0011 #include <linux/delay.h>
0012 #include <linux/etherdevice.h>
0013 #include <linux/hardirq.h>
0014 #include <linux/netdevice.h>
0015 #include <linux/if_arp.h>
0016 #include <linux/kthread.h>
0017 #include <linux/kfifo.h>
0018 #include <linux/slab.h>
0019 #include <net/cfg80211.h>
0020 
0021 #include "host.h"
0022 #include "decl.h"
0023 #include "dev.h"
0024 #include "cfg.h"
0025 #include "debugfs.h"
0026 #include "cmd.h"
0027 #include "mesh.h"
0028 
0029 #define DRIVER_RELEASE_VERSION "323.p0"
0030 const char lbs_driver_version[] = "COMM-USB8388-" DRIVER_RELEASE_VERSION
0031 #ifdef  DEBUG
0032     "-dbg"
0033 #endif
0034     "";
0035 
0036 
0037 /* Module parameters */
0038 unsigned int lbs_debug;
0039 EXPORT_SYMBOL_GPL(lbs_debug);
0040 module_param_named(libertas_debug, lbs_debug, int, 0644);
0041 
0042 unsigned int lbs_disablemesh;
0043 EXPORT_SYMBOL_GPL(lbs_disablemesh);
0044 module_param_named(libertas_disablemesh, lbs_disablemesh, int, 0644);
0045 
0046 
0047 /*
0048  * This global structure is used to send the confirm_sleep command as
0049  * fast as possible down to the firmware.
0050  */
0051 struct cmd_confirm_sleep confirm_sleep;
0052 
0053 
0054 /*
0055  * the table to keep region code
0056  */
0057 u16 lbs_region_code_to_index[MRVDRV_MAX_REGION_CODE] =
0058     { 0x10, 0x20, 0x30, 0x31, 0x32, 0x40 };
0059 
0060 /*
0061  * FW rate table.  FW refers to rates by their index in this table, not by the
0062  * rate value itself.  Values of 0x00 are
0063  * reserved positions.
0064  */
0065 static u8 fw_data_rates[MAX_RATES] =
0066     { 0x02, 0x04, 0x0B, 0x16, 0x00, 0x0C, 0x12,
0067       0x18, 0x24, 0x30, 0x48, 0x60, 0x6C, 0x00
0068 };
0069 
0070 /**
0071  *  lbs_fw_index_to_data_rate - use index to get the data rate
0072  *
0073  *  @idx:   The index of data rate
0074  *  returns:    data rate or 0
0075  */
0076 u32 lbs_fw_index_to_data_rate(u8 idx)
0077 {
0078     if (idx >= sizeof(fw_data_rates))
0079         idx = 0;
0080     return fw_data_rates[idx];
0081 }
0082 
0083 /**
0084  *  lbs_data_rate_to_fw_index - use rate to get the index
0085  *
0086  *  @rate:  data rate
0087  *  returns:    index or 0
0088  */
0089 u8 lbs_data_rate_to_fw_index(u32 rate)
0090 {
0091     u8 i;
0092 
0093     if (!rate)
0094         return 0;
0095 
0096     for (i = 0; i < sizeof(fw_data_rates); i++) {
0097         if (rate == fw_data_rates[i])
0098             return i;
0099     }
0100     return 0;
0101 }
0102 
0103 int lbs_set_iface_type(struct lbs_private *priv, enum nl80211_iftype type)
0104 {
0105     int ret = 0;
0106 
0107     switch (type) {
0108     case NL80211_IFTYPE_MONITOR:
0109         ret = lbs_set_monitor_mode(priv, 1);
0110         break;
0111     case NL80211_IFTYPE_STATION:
0112         if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR)
0113             ret = lbs_set_monitor_mode(priv, 0);
0114         if (!ret)
0115             ret = lbs_set_snmp_mib(priv, SNMP_MIB_OID_BSS_TYPE, 1);
0116         break;
0117     case NL80211_IFTYPE_ADHOC:
0118         if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR)
0119             ret = lbs_set_monitor_mode(priv, 0);
0120         if (!ret)
0121             ret = lbs_set_snmp_mib(priv, SNMP_MIB_OID_BSS_TYPE, 2);
0122         break;
0123     default:
0124         ret = -ENOTSUPP;
0125     }
0126     return ret;
0127 }
0128 
0129 int lbs_start_iface(struct lbs_private *priv)
0130 {
0131     struct cmd_ds_802_11_mac_address cmd;
0132     int ret;
0133 
0134     if (priv->power_restore) {
0135         ret = priv->power_restore(priv);
0136         if (ret)
0137             return ret;
0138     }
0139 
0140     cmd.hdr.size = cpu_to_le16(sizeof(cmd));
0141     cmd.action = cpu_to_le16(CMD_ACT_SET);
0142     memcpy(cmd.macadd, priv->current_addr, ETH_ALEN);
0143 
0144     ret = lbs_cmd_with_response(priv, CMD_802_11_MAC_ADDRESS, &cmd);
0145     if (ret) {
0146         lbs_deb_net("set MAC address failed\n");
0147         goto err;
0148     }
0149 
0150     ret = lbs_set_iface_type(priv, priv->wdev->iftype);
0151     if (ret) {
0152         lbs_deb_net("set iface type failed\n");
0153         goto err;
0154     }
0155 
0156     ret = lbs_set_11d_domain_info(priv);
0157     if (ret) {
0158         lbs_deb_net("set 11d domain info failed\n");
0159         goto err;
0160     }
0161 
0162     lbs_update_channel(priv);
0163 
0164     priv->iface_running = true;
0165     return 0;
0166 
0167 err:
0168     if (priv->power_save)
0169         priv->power_save(priv);
0170     return ret;
0171 }
0172 
0173 /**
0174  *  lbs_dev_open - open the ethX interface
0175  *
0176  *  @dev:   A pointer to &net_device structure
0177  *  returns:    0 or -EBUSY if monitor mode active
0178  */
0179 static int lbs_dev_open(struct net_device *dev)
0180 {
0181     struct lbs_private *priv = dev->ml_priv;
0182     int ret = 0;
0183 
0184     if (!priv->iface_running) {
0185         ret = lbs_start_iface(priv);
0186         if (ret)
0187             goto out;
0188     }
0189 
0190     spin_lock_irq(&priv->driver_lock);
0191 
0192     netif_carrier_off(dev);
0193 
0194     if (!priv->tx_pending_len)
0195         netif_wake_queue(dev);
0196 
0197     spin_unlock_irq(&priv->driver_lock);
0198 
0199 out:
0200     return ret;
0201 }
0202 
0203 static bool lbs_command_queue_empty(struct lbs_private *priv)
0204 {
0205     unsigned long flags;
0206     bool ret;
0207     spin_lock_irqsave(&priv->driver_lock, flags);
0208     ret = priv->cur_cmd == NULL && list_empty(&priv->cmdpendingq);
0209     spin_unlock_irqrestore(&priv->driver_lock, flags);
0210     return ret;
0211 }
0212 
0213 int lbs_stop_iface(struct lbs_private *priv)
0214 {
0215     unsigned long flags;
0216     int ret = 0;
0217 
0218     spin_lock_irqsave(&priv->driver_lock, flags);
0219     priv->iface_running = false;
0220     kfree_skb(priv->currenttxskb);
0221     priv->currenttxskb = NULL;
0222     priv->tx_pending_len = 0;
0223     spin_unlock_irqrestore(&priv->driver_lock, flags);
0224 
0225     cancel_work_sync(&priv->mcast_work);
0226     del_timer_sync(&priv->tx_lockup_timer);
0227 
0228     /* Disable command processing, and wait for all commands to complete */
0229     lbs_deb_main("waiting for commands to complete\n");
0230     wait_event(priv->waitq, lbs_command_queue_empty(priv));
0231     lbs_deb_main("all commands completed\n");
0232 
0233     if (priv->power_save)
0234         ret = priv->power_save(priv);
0235 
0236     return ret;
0237 }
0238 
0239 /**
0240  *  lbs_eth_stop - close the ethX interface
0241  *
0242  *  @dev:   A pointer to &net_device structure
0243  *  returns:    0
0244  */
0245 static int lbs_eth_stop(struct net_device *dev)
0246 {
0247     struct lbs_private *priv = dev->ml_priv;
0248 
0249     if (priv->connect_status == LBS_CONNECTED)
0250         lbs_disconnect(priv, WLAN_REASON_DEAUTH_LEAVING);
0251 
0252     spin_lock_irq(&priv->driver_lock);
0253     netif_stop_queue(dev);
0254     spin_unlock_irq(&priv->driver_lock);
0255 
0256     lbs_update_mcast(priv);
0257     cancel_delayed_work_sync(&priv->scan_work);
0258     if (priv->scan_req)
0259         lbs_scan_done(priv);
0260 
0261     netif_carrier_off(priv->dev);
0262 
0263     if (!lbs_iface_active(priv))
0264         lbs_stop_iface(priv);
0265 
0266     return 0;
0267 }
0268 
0269 void lbs_host_to_card_done(struct lbs_private *priv)
0270 {
0271     unsigned long flags;
0272 
0273     spin_lock_irqsave(&priv->driver_lock, flags);
0274     del_timer(&priv->tx_lockup_timer);
0275 
0276     priv->dnld_sent = DNLD_RES_RECEIVED;
0277 
0278     /* Wake main thread if commands are pending */
0279     if (!priv->cur_cmd || priv->tx_pending_len > 0) {
0280         if (!priv->wakeup_dev_required)
0281             wake_up(&priv->waitq);
0282     }
0283 
0284     spin_unlock_irqrestore(&priv->driver_lock, flags);
0285 }
0286 EXPORT_SYMBOL_GPL(lbs_host_to_card_done);
0287 
0288 int lbs_set_mac_address(struct net_device *dev, void *addr)
0289 {
0290     int ret = 0;
0291     struct lbs_private *priv = dev->ml_priv;
0292     struct sockaddr *phwaddr = addr;
0293 
0294     /*
0295      * Can only set MAC address when all interfaces are down, to be written
0296      * to the hardware when one of them is brought up.
0297      */
0298     if (lbs_iface_active(priv))
0299         return -EBUSY;
0300 
0301     /* In case it was called from the mesh device */
0302     dev = priv->dev;
0303 
0304     memcpy(priv->current_addr, phwaddr->sa_data, ETH_ALEN);
0305     eth_hw_addr_set(dev, phwaddr->sa_data);
0306     if (priv->mesh_dev)
0307         eth_hw_addr_set(priv->mesh_dev, phwaddr->sa_data);
0308 
0309     return ret;
0310 }
0311 
0312 
0313 static inline int mac_in_list(unsigned char *list, int list_len,
0314                   unsigned char *mac)
0315 {
0316     while (list_len) {
0317         if (!memcmp(list, mac, ETH_ALEN))
0318             return 1;
0319         list += ETH_ALEN;
0320         list_len--;
0321     }
0322     return 0;
0323 }
0324 
0325 
0326 static int lbs_add_mcast_addrs(struct cmd_ds_mac_multicast_adr *cmd,
0327                    struct net_device *dev, int nr_addrs)
0328 {
0329     int i = nr_addrs;
0330     struct netdev_hw_addr *ha;
0331     int cnt;
0332 
0333     if ((dev->flags & (IFF_UP|IFF_MULTICAST)) != (IFF_UP|IFF_MULTICAST))
0334         return nr_addrs;
0335 
0336     netif_addr_lock_bh(dev);
0337     cnt = netdev_mc_count(dev);
0338     netdev_for_each_mc_addr(ha, dev) {
0339         if (mac_in_list(cmd->maclist, nr_addrs, ha->addr)) {
0340             lbs_deb_net("mcast address %s:%pM skipped\n", dev->name,
0341                     ha->addr);
0342             cnt--;
0343             continue;
0344         }
0345 
0346         if (i == MRVDRV_MAX_MULTICAST_LIST_SIZE)
0347             break;
0348         memcpy(&cmd->maclist[6*i], ha->addr, ETH_ALEN);
0349         lbs_deb_net("mcast address %s:%pM added to filter\n", dev->name,
0350                 ha->addr);
0351         i++;
0352         cnt--;
0353     }
0354     netif_addr_unlock_bh(dev);
0355     if (cnt)
0356         return -EOVERFLOW;
0357 
0358     return i;
0359 }
0360 
0361 void lbs_update_mcast(struct lbs_private *priv)
0362 {
0363     struct cmd_ds_mac_multicast_adr mcast_cmd;
0364     int dev_flags = 0;
0365     int nr_addrs;
0366     int old_mac_control = priv->mac_control;
0367 
0368     if (netif_running(priv->dev))
0369         dev_flags |= priv->dev->flags;
0370     if (priv->mesh_dev && netif_running(priv->mesh_dev))
0371         dev_flags |= priv->mesh_dev->flags;
0372 
0373     if (dev_flags & IFF_PROMISC) {
0374         priv->mac_control |= CMD_ACT_MAC_PROMISCUOUS_ENABLE;
0375         priv->mac_control &= ~(CMD_ACT_MAC_ALL_MULTICAST_ENABLE |
0376                        CMD_ACT_MAC_MULTICAST_ENABLE);
0377         goto out_set_mac_control;
0378     } else if (dev_flags & IFF_ALLMULTI) {
0379     do_allmulti:
0380         priv->mac_control |= CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
0381         priv->mac_control &= ~(CMD_ACT_MAC_PROMISCUOUS_ENABLE |
0382                        CMD_ACT_MAC_MULTICAST_ENABLE);
0383         goto out_set_mac_control;
0384     }
0385 
0386     /* Once for priv->dev, again for priv->mesh_dev if it exists */
0387     nr_addrs = lbs_add_mcast_addrs(&mcast_cmd, priv->dev, 0);
0388     if (nr_addrs >= 0 && priv->mesh_dev)
0389         nr_addrs = lbs_add_mcast_addrs(&mcast_cmd, priv->mesh_dev, nr_addrs);
0390     if (nr_addrs < 0)
0391         goto do_allmulti;
0392 
0393     if (nr_addrs) {
0394         int size = offsetof(struct cmd_ds_mac_multicast_adr,
0395                     maclist[6*nr_addrs]);
0396 
0397         mcast_cmd.action = cpu_to_le16(CMD_ACT_SET);
0398         mcast_cmd.hdr.size = cpu_to_le16(size);
0399         mcast_cmd.nr_of_adrs = cpu_to_le16(nr_addrs);
0400 
0401         lbs_cmd_async(priv, CMD_MAC_MULTICAST_ADR, &mcast_cmd.hdr, size);
0402 
0403         priv->mac_control |= CMD_ACT_MAC_MULTICAST_ENABLE;
0404     } else
0405         priv->mac_control &= ~CMD_ACT_MAC_MULTICAST_ENABLE;
0406 
0407     priv->mac_control &= ~(CMD_ACT_MAC_PROMISCUOUS_ENABLE |
0408                    CMD_ACT_MAC_ALL_MULTICAST_ENABLE);
0409  out_set_mac_control:
0410     if (priv->mac_control != old_mac_control)
0411         lbs_set_mac_control(priv);
0412 }
0413 
0414 static void lbs_set_mcast_worker(struct work_struct *work)
0415 {
0416     struct lbs_private *priv = container_of(work, struct lbs_private, mcast_work);
0417     lbs_update_mcast(priv);
0418 }
0419 
0420 void lbs_set_multicast_list(struct net_device *dev)
0421 {
0422     struct lbs_private *priv = dev->ml_priv;
0423 
0424     schedule_work(&priv->mcast_work);
0425 }
0426 
0427 /**
0428  *  lbs_thread - handles the major jobs in the LBS driver.
0429  *  It handles all events generated by firmware, RX data received
0430  *  from firmware and TX data sent from kernel.
0431  *
0432  *  @data:  A pointer to &lbs_thread structure
0433  *  returns:    0
0434  */
0435 static int lbs_thread(void *data)
0436 {
0437     struct net_device *dev = data;
0438     struct lbs_private *priv = dev->ml_priv;
0439     wait_queue_entry_t wait;
0440 
0441     init_waitqueue_entry(&wait, current);
0442 
0443     for (;;) {
0444         int shouldsleep;
0445         u8 resp_idx;
0446 
0447         lbs_deb_thread("1: currenttxskb %p, dnld_sent %d\n",
0448                 priv->currenttxskb, priv->dnld_sent);
0449 
0450         add_wait_queue(&priv->waitq, &wait);
0451         set_current_state(TASK_INTERRUPTIBLE);
0452         spin_lock_irq(&priv->driver_lock);
0453 
0454         if (kthread_should_stop())
0455             shouldsleep = 0;    /* Bye */
0456         else if (priv->surpriseremoved)
0457             shouldsleep = 1;    /* We need to wait until we're _told_ to die */
0458         else if (priv->psstate == PS_STATE_SLEEP)
0459             shouldsleep = 1;    /* Sleep mode. Nothing we can do till it wakes */
0460         else if (priv->cmd_timed_out)
0461             shouldsleep = 0;    /* Command timed out. Recover */
0462         else if (!priv->fw_ready)
0463             shouldsleep = 1;    /* Firmware not ready. We're waiting for it */
0464         else if (priv->dnld_sent)
0465             shouldsleep = 1;    /* Something is en route to the device already */
0466         else if (priv->tx_pending_len > 0)
0467             shouldsleep = 0;    /* We've a packet to send */
0468         else if (priv->resp_len[priv->resp_idx])
0469             shouldsleep = 0;    /* We have a command response */
0470         else if (priv->cur_cmd)
0471             shouldsleep = 1;    /* Can't send a command; one already running */
0472         else if (!list_empty(&priv->cmdpendingq) &&
0473                     !(priv->wakeup_dev_required))
0474             shouldsleep = 0;    /* We have a command to send */
0475         else if (kfifo_len(&priv->event_fifo))
0476             shouldsleep = 0;    /* We have an event to process */
0477         else
0478             shouldsleep = 1;    /* No command */
0479 
0480         if (shouldsleep) {
0481             lbs_deb_thread("sleeping, connect_status %d, "
0482                 "psmode %d, psstate %d\n",
0483                 priv->connect_status,
0484                 priv->psmode, priv->psstate);
0485             spin_unlock_irq(&priv->driver_lock);
0486             schedule();
0487         } else
0488             spin_unlock_irq(&priv->driver_lock);
0489 
0490         lbs_deb_thread("2: currenttxskb %p, dnld_send %d\n",
0491                    priv->currenttxskb, priv->dnld_sent);
0492 
0493         set_current_state(TASK_RUNNING);
0494         remove_wait_queue(&priv->waitq, &wait);
0495 
0496         lbs_deb_thread("3: currenttxskb %p, dnld_sent %d\n",
0497                    priv->currenttxskb, priv->dnld_sent);
0498 
0499         if (kthread_should_stop()) {
0500             lbs_deb_thread("break from main thread\n");
0501             break;
0502         }
0503 
0504         if (priv->surpriseremoved) {
0505             lbs_deb_thread("adapter removed; waiting to die...\n");
0506             continue;
0507         }
0508 
0509         lbs_deb_thread("4: currenttxskb %p, dnld_sent %d\n",
0510                priv->currenttxskb, priv->dnld_sent);
0511 
0512         /* Process any pending command response */
0513         spin_lock_irq(&priv->driver_lock);
0514         resp_idx = priv->resp_idx;
0515         if (priv->resp_len[resp_idx]) {
0516             spin_unlock_irq(&priv->driver_lock);
0517             lbs_process_command_response(priv,
0518                 priv->resp_buf[resp_idx],
0519                 priv->resp_len[resp_idx]);
0520             spin_lock_irq(&priv->driver_lock);
0521             priv->resp_len[resp_idx] = 0;
0522         }
0523         spin_unlock_irq(&priv->driver_lock);
0524 
0525         /* Process hardware events, e.g. card removed, link lost */
0526         spin_lock_irq(&priv->driver_lock);
0527         while (kfifo_len(&priv->event_fifo)) {
0528             u32 event;
0529 
0530             if (kfifo_out(&priv->event_fifo,
0531                 (unsigned char *) &event, sizeof(event)) !=
0532                 sizeof(event))
0533                     break;
0534             spin_unlock_irq(&priv->driver_lock);
0535             lbs_process_event(priv, event);
0536             spin_lock_irq(&priv->driver_lock);
0537         }
0538         spin_unlock_irq(&priv->driver_lock);
0539 
0540         if (priv->wakeup_dev_required) {
0541             lbs_deb_thread("Waking up device...\n");
0542             /* Wake up device */
0543             if (priv->exit_deep_sleep(priv))
0544                 lbs_deb_thread("Wakeup device failed\n");
0545             continue;
0546         }
0547 
0548         /* command timeout stuff */
0549         if (priv->cmd_timed_out && priv->cur_cmd) {
0550             struct cmd_ctrl_node *cmdnode = priv->cur_cmd;
0551 
0552             netdev_info(dev, "Timeout submitting command 0x%04x\n",
0553                     le16_to_cpu(cmdnode->cmdbuf->command));
0554             lbs_complete_command(priv, cmdnode, -ETIMEDOUT);
0555 
0556             /* Reset card, but only when it isn't in the process
0557              * of being shutdown anyway. */
0558             if (!dev->dismantle && priv->reset_card)
0559                 priv->reset_card(priv);
0560         }
0561         priv->cmd_timed_out = 0;
0562 
0563         if (!priv->fw_ready)
0564             continue;
0565 
0566         /* Check if we need to confirm Sleep Request received previously */
0567         if (priv->psstate == PS_STATE_PRE_SLEEP &&
0568             !priv->dnld_sent && !priv->cur_cmd) {
0569             if (priv->connect_status == LBS_CONNECTED) {
0570                 lbs_deb_thread("pre-sleep, currenttxskb %p, "
0571                     "dnld_sent %d, cur_cmd %p\n",
0572                     priv->currenttxskb, priv->dnld_sent,
0573                     priv->cur_cmd);
0574 
0575                 lbs_ps_confirm_sleep(priv);
0576             } else {
0577                 /* workaround for firmware sending
0578                  * deauth/linkloss event immediately
0579                  * after sleep request; remove this
0580                  * after firmware fixes it
0581                  */
0582                 priv->psstate = PS_STATE_AWAKE;
0583                 netdev_alert(dev,
0584                          "ignore PS_SleepConfirm in non-connected state\n");
0585             }
0586         }
0587 
0588         /* The PS state is changed during processing of Sleep Request
0589          * event above
0590          */
0591         if ((priv->psstate == PS_STATE_SLEEP) ||
0592             (priv->psstate == PS_STATE_PRE_SLEEP))
0593             continue;
0594 
0595         if (priv->is_deep_sleep)
0596             continue;
0597 
0598         /* Execute the next command */
0599         if (!priv->dnld_sent && !priv->cur_cmd)
0600             lbs_execute_next_command(priv);
0601 
0602         spin_lock_irq(&priv->driver_lock);
0603         if (!priv->dnld_sent && priv->tx_pending_len > 0) {
0604             int ret = priv->hw_host_to_card(priv, MVMS_DAT,
0605                             priv->tx_pending_buf,
0606                             priv->tx_pending_len);
0607             if (ret) {
0608                 lbs_deb_tx("host_to_card failed %d\n", ret);
0609                 priv->dnld_sent = DNLD_RES_RECEIVED;
0610             } else {
0611                 mod_timer(&priv->tx_lockup_timer,
0612                       jiffies + (HZ * 5));
0613             }
0614             priv->tx_pending_len = 0;
0615             if (!priv->currenttxskb) {
0616                 /* We can wake the queues immediately if we aren't
0617                    waiting for TX feedback */
0618                 if (priv->connect_status == LBS_CONNECTED)
0619                     netif_wake_queue(priv->dev);
0620                 if (priv->mesh_dev &&
0621                     netif_running(priv->mesh_dev))
0622                     netif_wake_queue(priv->mesh_dev);
0623             }
0624         }
0625         spin_unlock_irq(&priv->driver_lock);
0626     }
0627 
0628     del_timer(&priv->command_timer);
0629     del_timer(&priv->tx_lockup_timer);
0630     del_timer(&priv->auto_deepsleep_timer);
0631 
0632     return 0;
0633 }
0634 
0635 /**
0636  * lbs_setup_firmware - gets the HW spec from the firmware and sets
0637  *        some basic parameters
0638  *
0639  *  @priv:  A pointer to &struct lbs_private structure
0640  *  returns:    0 or -1
0641  */
0642 static int lbs_setup_firmware(struct lbs_private *priv)
0643 {
0644     int ret = -1;
0645     s16 curlevel = 0, minlevel = 0, maxlevel = 0;
0646 
0647     /* Read MAC address from firmware */
0648     eth_broadcast_addr(priv->current_addr);
0649     ret = lbs_update_hw_spec(priv);
0650     if (ret)
0651         goto done;
0652 
0653     /* Read power levels if available */
0654     ret = lbs_get_tx_power(priv, &curlevel, &minlevel, &maxlevel);
0655     if (ret == 0) {
0656         priv->txpower_cur = curlevel;
0657         priv->txpower_min = minlevel;
0658         priv->txpower_max = maxlevel;
0659     }
0660 
0661     /* Send cmd to FW to enable 11D function */
0662     ret = lbs_set_snmp_mib(priv, SNMP_MIB_OID_11D_ENABLE, 1);
0663     if (ret)
0664         goto done;
0665 
0666     ret = lbs_set_mac_control_sync(priv);
0667 done:
0668     return ret;
0669 }
0670 
0671 int lbs_suspend(struct lbs_private *priv)
0672 {
0673     int ret;
0674 
0675     if (priv->is_deep_sleep) {
0676         ret = lbs_set_deep_sleep(priv, 0);
0677         if (ret) {
0678             netdev_err(priv->dev,
0679                    "deep sleep cancellation failed: %d\n", ret);
0680             return ret;
0681         }
0682         priv->deep_sleep_required = 1;
0683     }
0684 
0685     ret = lbs_set_host_sleep(priv, 1);
0686 
0687     netif_device_detach(priv->dev);
0688     if (priv->mesh_dev)
0689         netif_device_detach(priv->mesh_dev);
0690 
0691     return ret;
0692 }
0693 EXPORT_SYMBOL_GPL(lbs_suspend);
0694 
0695 int lbs_resume(struct lbs_private *priv)
0696 {
0697     int ret;
0698 
0699     ret = lbs_set_host_sleep(priv, 0);
0700 
0701     netif_device_attach(priv->dev);
0702     if (priv->mesh_dev)
0703         netif_device_attach(priv->mesh_dev);
0704 
0705     if (priv->deep_sleep_required) {
0706         priv->deep_sleep_required = 0;
0707         ret = lbs_set_deep_sleep(priv, 1);
0708         if (ret)
0709             netdev_err(priv->dev,
0710                    "deep sleep activation failed: %d\n", ret);
0711     }
0712 
0713     if (priv->setup_fw_on_resume)
0714         ret = lbs_setup_firmware(priv);
0715 
0716     return ret;
0717 }
0718 EXPORT_SYMBOL_GPL(lbs_resume);
0719 
0720 /**
0721  * lbs_cmd_timeout_handler - handles the timeout of command sending.
0722  * It will re-send the same command again.
0723  *
0724  * @t: Context from which to retrieve a &struct lbs_private pointer
0725  */
0726 static void lbs_cmd_timeout_handler(struct timer_list *t)
0727 {
0728     struct lbs_private *priv = from_timer(priv, t, command_timer);
0729     unsigned long flags;
0730 
0731     spin_lock_irqsave(&priv->driver_lock, flags);
0732 
0733     if (!priv->cur_cmd)
0734         goto out;
0735 
0736     netdev_info(priv->dev, "command 0x%04x timed out\n",
0737             le16_to_cpu(priv->cur_cmd->cmdbuf->command));
0738 
0739     priv->cmd_timed_out = 1;
0740 
0741     /*
0742      * If the device didn't even acknowledge the command, reset the state
0743      * so that we don't block all future commands due to this one timeout.
0744      */
0745     if (priv->dnld_sent == DNLD_CMD_SENT)
0746         priv->dnld_sent = DNLD_RES_RECEIVED;
0747 
0748     wake_up(&priv->waitq);
0749 out:
0750     spin_unlock_irqrestore(&priv->driver_lock, flags);
0751 }
0752 
0753 /**
0754  * lbs_tx_lockup_handler - handles the timeout of the passing of TX frames
0755  * to the hardware. This is known to frequently happen with SD8686 when
0756  * waking up after a Wake-on-WLAN-triggered resume.
0757  *
0758  * @t: Context from which to retrieve a &struct lbs_private pointer
0759  */
0760 static void lbs_tx_lockup_handler(struct timer_list *t)
0761 {
0762     struct lbs_private *priv = from_timer(priv, t, tx_lockup_timer);
0763     unsigned long flags;
0764 
0765     spin_lock_irqsave(&priv->driver_lock, flags);
0766 
0767     netdev_info(priv->dev, "TX lockup detected\n");
0768     if (priv->reset_card)
0769         priv->reset_card(priv);
0770 
0771     priv->dnld_sent = DNLD_RES_RECEIVED;
0772     wake_up_interruptible(&priv->waitq);
0773 
0774     spin_unlock_irqrestore(&priv->driver_lock, flags);
0775 }
0776 
0777 /**
0778  * auto_deepsleep_timer_fn - put the device back to deep sleep mode when
0779  * timer expires and no activity (command, event, data etc.) is detected.
0780  * @t: Context from which to retrieve a &struct lbs_private pointer
0781  * returns: N/A
0782  */
0783 static void auto_deepsleep_timer_fn(struct timer_list *t)
0784 {
0785     struct lbs_private *priv = from_timer(priv, t, auto_deepsleep_timer);
0786 
0787     if (priv->is_activity_detected) {
0788         priv->is_activity_detected = 0;
0789     } else {
0790         if (priv->is_auto_deep_sleep_enabled &&
0791             (!priv->wakeup_dev_required) &&
0792             (priv->connect_status != LBS_CONNECTED)) {
0793             struct cmd_header cmd;
0794 
0795             lbs_deb_main("Entering auto deep sleep mode...\n");
0796             memset(&cmd, 0, sizeof(cmd));
0797             cmd.size = cpu_to_le16(sizeof(cmd));
0798             lbs_cmd_async(priv, CMD_802_11_DEEP_SLEEP, &cmd,
0799                     sizeof(cmd));
0800         }
0801     }
0802     mod_timer(&priv->auto_deepsleep_timer , jiffies +
0803                 (priv->auto_deep_sleep_timeout * HZ)/1000);
0804 }
0805 
0806 int lbs_enter_auto_deep_sleep(struct lbs_private *priv)
0807 {
0808     priv->is_auto_deep_sleep_enabled = 1;
0809     if (priv->is_deep_sleep)
0810         priv->wakeup_dev_required = 1;
0811     mod_timer(&priv->auto_deepsleep_timer ,
0812             jiffies + (priv->auto_deep_sleep_timeout * HZ)/1000);
0813 
0814     return 0;
0815 }
0816 
0817 int lbs_exit_auto_deep_sleep(struct lbs_private *priv)
0818 {
0819     priv->is_auto_deep_sleep_enabled = 0;
0820     priv->auto_deep_sleep_timeout = 0;
0821     del_timer(&priv->auto_deepsleep_timer);
0822 
0823     return 0;
0824 }
0825 
0826 static int lbs_init_adapter(struct lbs_private *priv)
0827 {
0828     int ret;
0829 
0830     eth_broadcast_addr(priv->current_addr);
0831 
0832     priv->connect_status = LBS_DISCONNECTED;
0833     priv->channel = DEFAULT_AD_HOC_CHANNEL;
0834     priv->mac_control = CMD_ACT_MAC_RX_ON | CMD_ACT_MAC_TX_ON;
0835     priv->radio_on = 1;
0836     priv->psmode = LBS802_11POWERMODECAM;
0837     priv->psstate = PS_STATE_FULL_POWER;
0838     priv->is_deep_sleep = 0;
0839     priv->is_auto_deep_sleep_enabled = 0;
0840     priv->deep_sleep_required = 0;
0841     priv->wakeup_dev_required = 0;
0842     init_waitqueue_head(&priv->ds_awake_q);
0843     init_waitqueue_head(&priv->scan_q);
0844     priv->authtype_auto = 1;
0845     priv->is_host_sleep_configured = 0;
0846     priv->is_host_sleep_activated = 0;
0847     init_waitqueue_head(&priv->host_sleep_q);
0848     init_waitqueue_head(&priv->fw_waitq);
0849     mutex_init(&priv->lock);
0850 
0851     timer_setup(&priv->command_timer, lbs_cmd_timeout_handler, 0);
0852     timer_setup(&priv->tx_lockup_timer, lbs_tx_lockup_handler, 0);
0853     timer_setup(&priv->auto_deepsleep_timer, auto_deepsleep_timer_fn, 0);
0854 
0855     INIT_LIST_HEAD(&priv->cmdfreeq);
0856     INIT_LIST_HEAD(&priv->cmdpendingq);
0857 
0858     spin_lock_init(&priv->driver_lock);
0859 
0860     /* Allocate the command buffers */
0861     if (lbs_allocate_cmd_buffer(priv)) {
0862         pr_err("Out of memory allocating command buffers\n");
0863         ret = -ENOMEM;
0864         goto out;
0865     }
0866     priv->resp_idx = 0;
0867     priv->resp_len[0] = priv->resp_len[1] = 0;
0868 
0869     /* Create the event FIFO */
0870     ret = kfifo_alloc(&priv->event_fifo, sizeof(u32) * 16, GFP_KERNEL);
0871     if (ret) {
0872         pr_err("Out of memory allocating event FIFO buffer\n");
0873         goto out;
0874     }
0875 
0876 out:
0877     return ret;
0878 }
0879 
0880 static void lbs_free_adapter(struct lbs_private *priv)
0881 {
0882     lbs_free_cmd_buffer(priv);
0883     kfifo_free(&priv->event_fifo);
0884     del_timer(&priv->command_timer);
0885     del_timer(&priv->tx_lockup_timer);
0886     del_timer(&priv->auto_deepsleep_timer);
0887 }
0888 
0889 static const struct net_device_ops lbs_netdev_ops = {
0890     .ndo_open       = lbs_dev_open,
0891     .ndo_stop       = lbs_eth_stop,
0892     .ndo_start_xmit     = lbs_hard_start_xmit,
0893     .ndo_set_mac_address    = lbs_set_mac_address,
0894     .ndo_set_rx_mode    = lbs_set_multicast_list,
0895     .ndo_validate_addr  = eth_validate_addr,
0896 };
0897 
0898 /**
0899  * lbs_add_card - adds the card. It will probe the
0900  * card, allocate the lbs_priv and initialize the device.
0901  *
0902  * @card:   A pointer to card
0903  * @dmdev:  A pointer to &struct device
0904  * returns: A pointer to &struct lbs_private structure
0905  */
0906 struct lbs_private *lbs_add_card(void *card, struct device *dmdev)
0907 {
0908     struct net_device *dev;
0909     struct wireless_dev *wdev;
0910     struct lbs_private *priv = NULL;
0911     int err;
0912 
0913     /* Allocate an Ethernet device and register it */
0914     wdev = lbs_cfg_alloc(dmdev);
0915     if (IS_ERR(wdev)) {
0916         err = PTR_ERR(wdev);
0917         pr_err("cfg80211 init failed\n");
0918         goto err_cfg;
0919     }
0920 
0921     wdev->iftype = NL80211_IFTYPE_STATION;
0922     priv = wdev_priv(wdev);
0923     priv->wdev = wdev;
0924 
0925     err = lbs_init_adapter(priv);
0926     if (err) {
0927         pr_err("failed to initialize adapter structure\n");
0928         goto err_wdev;
0929     }
0930 
0931     dev = alloc_netdev(0, "wlan%d", NET_NAME_UNKNOWN, ether_setup);
0932     if (!dev) {
0933         err = -ENOMEM;
0934         dev_err(dmdev, "no memory for network device instance\n");
0935         goto err_adapter;
0936     }
0937 
0938     dev->ieee80211_ptr = wdev;
0939     dev->ml_priv = priv;
0940     SET_NETDEV_DEV(dev, dmdev);
0941     wdev->netdev = dev;
0942     priv->dev = dev;
0943 
0944     dev->netdev_ops = &lbs_netdev_ops;
0945     dev->watchdog_timeo = 5 * HZ;
0946     dev->ethtool_ops = &lbs_ethtool_ops;
0947     dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
0948 
0949     priv->card = card;
0950 
0951     strcpy(dev->name, "wlan%d");
0952 
0953     lbs_deb_thread("Starting main thread...\n");
0954     init_waitqueue_head(&priv->waitq);
0955     priv->main_thread = kthread_run(lbs_thread, dev, "lbs_main");
0956     if (IS_ERR(priv->main_thread)) {
0957         err = PTR_ERR(priv->main_thread);
0958         lbs_deb_thread("Error creating main thread.\n");
0959         goto err_ndev;
0960     }
0961 
0962     priv->work_thread = create_singlethread_workqueue("lbs_worker");
0963     INIT_WORK(&priv->mcast_work, lbs_set_mcast_worker);
0964 
0965     priv->wol_criteria = EHS_REMOVE_WAKEUP;
0966     priv->wol_gpio = 0xff;
0967     priv->wol_gap = 20;
0968     priv->ehs_remove_supported = true;
0969 
0970     return priv;
0971 
0972  err_ndev:
0973     free_netdev(dev);
0974 
0975  err_adapter:
0976     lbs_free_adapter(priv);
0977 
0978  err_wdev:
0979     lbs_cfg_free(priv);
0980 
0981  err_cfg:
0982     return ERR_PTR(err);
0983 }
0984 EXPORT_SYMBOL_GPL(lbs_add_card);
0985 
0986 
0987 void lbs_remove_card(struct lbs_private *priv)
0988 {
0989     struct net_device *dev = priv->dev;
0990 
0991     lbs_remove_mesh(priv);
0992 
0993     if (priv->wiphy_registered)
0994         lbs_scan_deinit(priv);
0995 
0996     lbs_wait_for_firmware_load(priv);
0997 
0998     /* worker thread destruction blocks on the in-flight command which
0999      * 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");
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