main.c

linux内核源码

		struct net_device *dev)
{
	wlan_private *priv = dev->priv;
	int ret;

	lbs_deb_enter(LBS_DEB_MESH);
	if(priv->adapter->monitormode != WLAN_MONITOR_OFF) {
		netif_stop_queue(dev);
		return -EOPNOTSUPP;
	}

	SET_MESH_FRAME(skb);

	ret = libertas_hard_start_xmit(skb, priv->dev);
	lbs_deb_leave_args(LBS_DEB_MESH, "ret %d", ret);
	return ret;
}

/**
 * @brief Mark non-mesh packets and handover them to libertas_hard_start_xmit
 *
 */
static int libertas_pre_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
	wlan_private *priv = dev->priv;
	int ret;

	lbs_deb_enter(LBS_DEB_NET);

	if(priv->adapter->monitormode != WLAN_MONITOR_OFF) {
		netif_stop_queue(dev);
		return -EOPNOTSUPP;
	}

	UNSET_MESH_FRAME(skb);

	ret = libertas_hard_start_xmit(skb, dev);
	lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
	return ret;
}

static void libertas_tx_timeout(struct net_device *dev)
{
	wlan_private *priv = (wlan_private *) dev->priv;

	lbs_deb_enter(LBS_DEB_TX);

	lbs_pr_err("tx watch dog timeout\n");

	priv->dnld_sent = DNLD_RES_RECEIVED;
	dev->trans_start = jiffies;

	if (priv->adapter->currenttxskb) {
		if (priv->adapter->monitormode != WLAN_MONITOR_OFF) {
			/* If we are here, we have not received feedback from
			   the previous packet.  Assume TX_FAIL and move on. */
			priv->adapter->eventcause = 0x01000000;
			libertas_send_tx_feedback(priv);
		} else
			wake_up_interruptible(&priv->waitq);
	} else if (priv->adapter->connect_status == LIBERTAS_CONNECTED) {
		netif_wake_queue(priv->dev);
		if (priv->mesh_dev)
			netif_wake_queue(priv->mesh_dev);
	}

	lbs_deb_leave(LBS_DEB_TX);
}

/**
 *  @brief This function returns the network statistics
 *
 *  @param dev     A pointer to wlan_private structure
 *  @return 	   A pointer to net_device_stats structure
 */
static struct net_device_stats *libertas_get_stats(struct net_device *dev)
{
	wlan_private *priv = (wlan_private *) dev->priv;

	return &priv->stats;
}

static int libertas_set_mac_address(struct net_device *dev, void *addr)
{
	int ret = 0;
	wlan_private *priv = (wlan_private *) dev->priv;
	wlan_adapter *adapter = priv->adapter;
	struct sockaddr *phwaddr = addr;

	lbs_deb_enter(LBS_DEB_NET);

	/* In case it was called from the mesh device */
	dev = priv->dev ;

	memset(adapter->current_addr, 0, ETH_ALEN);

	/* dev->dev_addr is 8 bytes */
	lbs_deb_hex(LBS_DEB_NET, "dev->dev_addr", dev->dev_addr, ETH_ALEN);

	lbs_deb_hex(LBS_DEB_NET, "addr", phwaddr->sa_data, ETH_ALEN);
	memcpy(adapter->current_addr, phwaddr->sa_data, ETH_ALEN);

	ret = libertas_prepare_and_send_command(priv, CMD_802_11_MAC_ADDRESS,
				    CMD_ACT_SET,
				    CMD_OPTION_WAITFORRSP, 0, NULL);

	if (ret) {
		lbs_deb_net("set MAC address failed\n");
		ret = -1;
		goto done;
	}

	lbs_deb_hex(LBS_DEB_NET, "adapter->macaddr", adapter->current_addr, ETH_ALEN);
	memcpy(dev->dev_addr, adapter->current_addr, ETH_ALEN);
	if (priv->mesh_dev)
		memcpy(priv->mesh_dev->dev_addr, adapter->current_addr, ETH_ALEN);

done:
	lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
	return ret;
}

static int libertas_copy_multicast_address(wlan_adapter * adapter,
				     struct net_device *dev)
{
	int i = 0;
	struct dev_mc_list *mcptr = dev->mc_list;

	for (i = 0; i < dev->mc_count; i++) {
		memcpy(&adapter->multicastlist[i], mcptr->dmi_addr, ETH_ALEN);
		mcptr = mcptr->next;
	}

	return i;

}

static void libertas_set_multicast_list(struct net_device *dev)
{
	wlan_private *priv = dev->priv;
	wlan_adapter *adapter = priv->adapter;
	int oldpacketfilter;
	DECLARE_MAC_BUF(mac);

	lbs_deb_enter(LBS_DEB_NET);

	oldpacketfilter = adapter->currentpacketfilter;

	if (dev->flags & IFF_PROMISC) {
		lbs_deb_net("enable promiscuous mode\n");
		adapter->currentpacketfilter |=
		    CMD_ACT_MAC_PROMISCUOUS_ENABLE;
		adapter->currentpacketfilter &=
		    ~(CMD_ACT_MAC_ALL_MULTICAST_ENABLE |
		      CMD_ACT_MAC_MULTICAST_ENABLE);
	} else {
		/* Multicast */
		adapter->currentpacketfilter &=
		    ~CMD_ACT_MAC_PROMISCUOUS_ENABLE;

		if (dev->flags & IFF_ALLMULTI || dev->mc_count >
		    MRVDRV_MAX_MULTICAST_LIST_SIZE) {
			lbs_deb_net( "enabling all multicast\n");
			adapter->currentpacketfilter |=
			    CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
			adapter->currentpacketfilter &=
			    ~CMD_ACT_MAC_MULTICAST_ENABLE;
		} else {
			adapter->currentpacketfilter &=
			    ~CMD_ACT_MAC_ALL_MULTICAST_ENABLE;

			if (!dev->mc_count) {
				lbs_deb_net("no multicast addresses, "
				       "disabling multicast\n");
				adapter->currentpacketfilter &=
				    ~CMD_ACT_MAC_MULTICAST_ENABLE;
			} else {
				int i;

				adapter->currentpacketfilter |=
				    CMD_ACT_MAC_MULTICAST_ENABLE;

				adapter->nr_of_multicastmacaddr =
				    libertas_copy_multicast_address(adapter, dev);

				lbs_deb_net("multicast addresses: %d\n",
				       dev->mc_count);

				for (i = 0; i < dev->mc_count; i++) {
					lbs_deb_net("Multicast address %d:%s\n",
					       i, print_mac(mac,
					       adapter->multicastlist[i]));
				}
				/* send multicast addresses to firmware */
				libertas_prepare_and_send_command(priv,
						      CMD_MAC_MULTICAST_ADR,
						      CMD_ACT_SET, 0, 0,
						      NULL);
			}
		}
	}

	if (adapter->currentpacketfilter != oldpacketfilter) {
		libertas_set_mac_packet_filter(priv);
	}

	lbs_deb_leave(LBS_DEB_NET);
}

/**
 *  @brief This function handles the major jobs in the WLAN driver.
 *  It handles all events generated by firmware, RX data received
 *  from firmware and TX data sent from kernel.
 *
 *  @param data    A pointer to wlan_thread structure
 *  @return 	   0
 */
static int libertas_thread(void *data)
{
	struct net_device *dev = data;
	wlan_private *priv = dev->priv;
	wlan_adapter *adapter = priv->adapter;
	wait_queue_t wait;
	u8 ireg = 0;

	lbs_deb_enter(LBS_DEB_THREAD);

	init_waitqueue_entry(&wait, current);

	set_freezable();
	for (;;) {
		lbs_deb_thread( "main-thread 111: intcounter=%d "
		       "currenttxskb=%p dnld_sent=%d\n",
		       adapter->intcounter,
		       adapter->currenttxskb, priv->dnld_sent);

		add_wait_queue(&priv->waitq, &wait);
		set_current_state(TASK_INTERRUPTIBLE);
		spin_lock_irq(&adapter->driver_lock);
		if ((adapter->psstate == PS_STATE_SLEEP) ||
		    (!adapter->intcounter
		     && (priv->dnld_sent || adapter->cur_cmd ||
			 list_empty(&adapter->cmdpendingq)))) {
			lbs_deb_thread(
			       "main-thread sleeping... Conn=%d IntC=%d PS_mode=%d PS_State=%d\n",
			       adapter->connect_status, adapter->intcounter,
			       adapter->psmode, adapter->psstate);
			spin_unlock_irq(&adapter->driver_lock);
			schedule();
		} else
			spin_unlock_irq(&adapter->driver_lock);

		lbs_deb_thread(
		       "main-thread 222 (waking up): intcounter=%d currenttxskb=%p "
		       "dnld_sent=%d\n", adapter->intcounter,
		       adapter->currenttxskb, priv->dnld_sent);

		set_current_state(TASK_RUNNING);
		remove_wait_queue(&priv->waitq, &wait);
		try_to_freeze();

		lbs_deb_thread("main-thread 333: intcounter=%d currenttxskb=%p "
		       "dnld_sent=%d\n",
		       adapter->intcounter,
		       adapter->currenttxskb, priv->dnld_sent);

		if (kthread_should_stop()
		    || adapter->surpriseremoved) {
			lbs_deb_thread(
			       "main-thread: break from main thread: surpriseremoved=0x%x\n",
			       adapter->surpriseremoved);
			break;
		}


		spin_lock_irq(&adapter->driver_lock);
		if (adapter->intcounter) {
			u8 int_status;
			adapter->intcounter = 0;
			int_status = priv->hw_get_int_status(priv, &ireg);

			if (int_status) {
				lbs_deb_thread(
				       "main-thread: reading HOST_INT_STATUS_REG failed\n");
				spin_unlock_irq(&adapter->driver_lock);
				continue;
			}
			adapter->hisregcpy |= ireg;
		}

		lbs_deb_thread("main-thread 444: intcounter=%d currenttxskb=%p "
		       "dnld_sent=%d\n",
		       adapter->intcounter,
		       adapter->currenttxskb, priv->dnld_sent);

		/* command response? */
		if (adapter->hisregcpy & MRVDRV_CMD_UPLD_RDY) {
			lbs_deb_thread("main-thread: cmd response ready\n");

			adapter->hisregcpy &= ~MRVDRV_CMD_UPLD_RDY;
			spin_unlock_irq(&adapter->driver_lock);
			libertas_process_rx_command(priv);
			spin_lock_irq(&adapter->driver_lock);
		}

		/* Any Card Event */
		if (adapter->hisregcpy & MRVDRV_CARDEVENT) {
			lbs_deb_thread("main-thread: Card Event Activity\n");

			adapter->hisregcpy &= ~MRVDRV_CARDEVENT;

			if (priv->hw_read_event_cause(priv)) {
				lbs_pr_alert(
				       "main-thread: hw_read_event_cause failed\n");
				spin_unlock_irq(&adapter->driver_lock);
				continue;
			}
			spin_unlock_irq(&adapter->driver_lock);
			libertas_process_event(priv);
		} else
			spin_unlock_irq(&adapter->driver_lock);

		/* Check if we need to confirm Sleep Request received previously */
		if (adapter->psstate == PS_STATE_PRE_SLEEP) {
			if (!priv->dnld_sent && !adapter->cur_cmd) {
				if (adapter->connect_status ==
				    LIBERTAS_CONNECTED) {
					lbs_deb_thread(
					       "main_thread: PRE_SLEEP--intcounter=%d currenttxskb=%p "
					       "dnld_sent=%d cur_cmd=%p, confirm now\n",
					       adapter->intcounter,
					       adapter->currenttxskb,
					       priv->dnld_sent,
					       adapter->cur_cmd);

					libertas_ps_confirm_sleep(priv,
						       (u16) adapter->psmode);
				} else {
					/* workaround for firmware sending
					 * deauth/linkloss event immediately
					 * after sleep request, remove this
					 * after firmware fixes it
					 */
					adapter->psstate = PS_STATE_AWAKE;
					lbs_pr_alert(
					       "main-thread: ignore PS_SleepConfirm in non-connected state\n");
				}
			}
		}

		/* The PS state is changed during processing of Sleep Request
		 * event above
		 */
		if ((priv->adapter->psstate == PS_STATE_SLEEP) ||
		    (priv->adapter->psstate == PS_STATE_PRE_SLEEP))
			continue;

		/* Execute the next command */
		if (!priv->dnld_sent && !priv->adapter->cur_cmd)
			libertas_execute_next_command(priv);

		/* Wake-up command waiters which can't sleep in
		 * libertas_prepare_and_send_command
		 */
		if (!adapter->nr_cmd_pending)
			wake_up_all(&adapter->cmd_pending);

		libertas_tx_runqueue(priv);
	}

	del_timer(&adapter->command_timer);
	adapter->nr_cmd_pending = 0;
	wake_up_all(&adapter->cmd_pending);

	lbs_deb_leave(LBS_DEB_THREAD);
	return 0;
}

/**
 *  @brief This function downloads firmware image, gets
 *  HW spec from firmware and set basic parameters to
 *  firmware.
 *
 *  @param priv    A pointer to wlan_private structure
 *  @return 	   0 or -1
 */
static int wlan_setup_firmware(wlan_private * priv)
{
	int ret = -1;
	wlan_adapter *adapter = priv->adapter;
	struct cmd_ds_mesh_access mesh_access;

	lbs_deb_enter(LBS_DEB_FW);

	/*
	 * Read MAC address from HW
	 */
	memset(adapter->current_addr, 0xff, ETH_ALEN);

	ret = libertas_prepare_and_send_command(priv, CMD_GET_HW_SPEC,
				    0, CMD_OPTION_WAITFORRSP, 0, NULL);

	if (ret) {
		ret = -1;
		goto done;
	}

	libertas_set_mac_packet_filter(priv);

	/* Get the supported Data rates */
	ret = libertas_prepare_and_send_command(priv, CMD_802_11_DATA_RATE,
				    CMD_ACT_GET_TX_RATE,
				    CMD_OPTION_WAITFORRSP, 0, NULL);

	if (ret) {
		ret = -1;
		goto done;
	}

	/* Disable mesh autostart */
	if (priv->mesh_dev) {
		memset(&mesh_access, 0, sizeof(mesh_access));
		mesh_access.data[0] = cpu_to_le32(0);
		ret = libertas_prepare_and_send_command(priv,
				CMD_MESH_ACCESS,
				CMD_ACT_MESH_SET_AUTOSTART_ENABLED,
				CMD_OPTION_WAITFORRSP, 0, (void *)&mesh_access);
		if (ret) {
			ret = -1;
			goto done;
		}
		priv->mesh_autostart_enabled = 0;
	}

       /* Set the boot2 version in firmware */
       ret = libertas_prepare_and_send_command(priv, CMD_SET_BOOT2_VER,
                                   0, CMD_OPTION_WAITFORRSP, 0, NULL);

	ret = 0;
done:
	lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret);
	return ret;
}

/**
 *  This function handles the timeout of command sending.
 *  It will re-send the same command again.
 */
static void command_timer_fn(unsigned long data)
{
	wlan_private *priv = (wlan_private *)data;
	wlan_adapter *adapter = priv->adapter;
	struct cmd_ctrl_node *ptempnode;
	struct cmd_ds_command *cmd;
	unsigned long flags;

	ptempnode = adapter->cur_cmd;
	if (ptempnode == NULL) {
		lbs_deb_fw("ptempnode empty\n");
		return;
	}

	cmd = (struct cmd_ds_command *)ptempnode->bufvirtualaddr;
	if (!cmd) {
		lbs_deb_fw("cmd is NULL\n");
		return;
	}

	lbs_deb_fw("command_timer_fn fired, cmd %x\n", cmd->command);

	if (!adapter->fw_ready)
		return;

	spin_lock_irqsave(&adapter->driver_lock, flags);
	adapter->cur_cmd = NULL;
	spin_unlock_irqrestore(&adapter->driver_lock, flags);

	lbs_deb_fw("re-sending same command because of timeout\n");
	libertas_queue_cmd(adapter, ptempnode, 0);

	wake_up_interruptible(&priv->waitq);

	return;
}

static int libertas_init_adapter(wlan_private * priv)
{
	wlan_adapter *adapter = priv->adapter;
	size_t bufsize;
	int i, ret = 0;

	/* Allocate buffer to store the BSSID list */
	bufsize = MAX_NETWORK_COUNT * sizeof(struct bss_descriptor);
	adapter->networks = kzalloc(bufsize, GFP_KERNEL);
	if (!adapter->networks) {
		lbs_pr_err("Out of memory allocating beacons\n");
		ret = -1;
		goto out;
	}

	/* Initialize scan result lists */
	INIT_LIST_HEAD(&adapter->network_free_list);
	INIT_LIST_HEAD(&adapter->network_list);
	for (i = 0; i < MAX_NETWORK_COUNT; i++) {
		list_add_tail(&adapter->networks[i].list,
			      &adapter->network_free_list);
	}

	adapter->libertas_ps_confirm_sleep.seqnum = cpu_to_le16(++adapter->seqnum);
	adapter->libertas_ps_confirm_sleep.command =
	    cpu_to_le16(CMD_802_11_PS_MODE);
	adapter->libertas_ps_confirm_sleep.size =
	    cpu_to_le16(sizeof(struct PS_CMD_ConfirmSleep));
	adapter->libertas_ps_confirm_sleep.action =
	    cpu_to_le16(CMD_SUBCMD_SLEEP_CONFIRMED);

	memset(adapter->current_addr, 0xff, ETH_ALEN);

	adapter->connect_status = LIBERTAS_DISCONNECTED;
	adapter->secinfo.auth_mode = IW_AUTH_ALG_OPEN_SYSTEM;
	adapter->mode = IW_MODE_INFRA;
	adapter->curbssparams.channel = DEFAULT_AD_HOC_CHANNEL;
	adapter->currentpacketfilter = CMD_ACT_MAC_RX_ON | CMD_ACT_MAC_TX_ON;
	adapter->radioon = RADIO_ON;
	adapter->auto_rate = 1;
	adapter->capability = WLAN_CAPABILITY_SHORT_PREAMBLE;
	adapter->psmode = WLAN802_11POWERMODECAM;
	adapter->psstate = PS_STATE_FULL_POWER;

	mutex_init(&adapter->lock);

	memset(&adapter->tx_queue_ps, 0, NR_TX_QUEUE*sizeof(struct sk_buff*));
	adapter->tx_queue_idx = 0;
	spin_lock_init(&adapter->txqueue_lock);

	setup_timer(&adapter->command_timer, command_timer_fn,
	            (unsigned long)priv);