#include "headers.h"

struct net_device *gblpnetdev;

static INT bcm_open(struct net_device *dev)
{
        struct bcm_mini_adapter *Adapter = GET_BCM_ADAPTER(dev);

        if (Adapter->fw_download_done == FALSE) {
                pr_notice(PFX "%s: link up failed (download in progress)\n",
                          dev->name);
                return -EBUSY;
        }

        if (netif_msg_ifup(Adapter))
                pr_info(PFX "%s: enabling interface\n", dev->name);

        if (Adapter->LinkUpStatus) {
                if (netif_msg_link(Adapter))
                        pr_info(PFX "%s: link up\n", dev->name);

                netif_carrier_on(Adapter->dev);
                netif_start_queue(Adapter->dev);
        }

        return 0;
}

static INT bcm_close(struct net_device *dev)
{
        struct bcm_mini_adapter *Adapter = GET_BCM_ADAPTER(dev);

        if (netif_msg_ifdown(Adapter))
                pr_info(PFX "%s: disabling interface\n", dev->name);

        netif_carrier_off(dev);
        netif_stop_queue(dev);

        return 0;
}

static u16 bcm_select_queue(struct net_device *dev, struct sk_buff *skb)
{
        return ClassifyPacket(netdev_priv(dev), skb);
}

/*******************************************************************
* Function    - bcm_transmit()
*
* Description - This is the main transmit function for our virtual
*               interface(eth0). It handles the ARP packets. It
*               clones this packet and then Queue it to a suitable
*               Queue. Then calls the transmit_packet().
*
* Parameter   -  skb - Pointer to the socket buffer structure
*                dev - Pointer to the virtual net device structure
*
*********************************************************************/

static netdev_tx_t bcm_transmit(struct sk_buff *skb, struct net_device *dev)
{
        struct bcm_mini_adapter *Adapter = GET_BCM_ADAPTER(dev);
        u16 qindex = skb_get_queue_mapping(skb);


        if (Adapter->device_removed || !Adapter->LinkUpStatus)
                goto drop;

        if (Adapter->TransferMode != IP_PACKET_ONLY_MODE)
                goto drop;

        if (INVALID_QUEUE_INDEX == qindex)
                goto drop;

        if (Adapter->PackInfo[qindex].uiCurrentPacketsOnHost >=
            SF_MAX_ALLOWED_PACKETS_TO_BACKUP)
                return NETDEV_TX_BUSY;

        /* Now Enqueue the packet */
        if (netif_msg_tx_queued(Adapter))
                pr_info(PFX "%s: enqueueing packet to queue %d\n",
                        dev->name, qindex);

        spin_lock(&Adapter->PackInfo[qindex].SFQueueLock);
        Adapter->PackInfo[qindex].uiCurrentBytesOnHost += skb->len;
        Adapter->PackInfo[qindex].uiCurrentPacketsOnHost++;

        *((B_UINT32 *) skb->cb + SKB_CB_LATENCY_OFFSET) = jiffies;
        ENQUEUEPACKET(Adapter->PackInfo[qindex].FirstTxQueue,
                      Adapter->PackInfo[qindex].LastTxQueue, skb);
        atomic_inc(&Adapter->TotalPacketCount);
        spin_unlock(&Adapter->PackInfo[qindex].SFQueueLock);

        /* FIXME - this is racy and incorrect, replace with work queue */
        if (!atomic_read(&Adapter->TxPktAvail)) {
                atomic_set(&Adapter->TxPktAvail, 1);
                wake_up(&Adapter->tx_packet_wait_queue);
        }
        return NETDEV_TX_OK;

 drop:
        dev_kfree_skb(skb);
        return NETDEV_TX_OK;
}



/**
@ingroup init_functions
Register other driver entry points with the kernel
*/
static const struct net_device_ops bcmNetDevOps = {
        .ndo_open               = bcm_open,
        .ndo_stop               = bcm_close,
        .ndo_start_xmit         = bcm_transmit,
        .ndo_change_mtu         = eth_change_mtu,
        .ndo_set_mac_address    = eth_mac_addr,
        .ndo_validate_addr      = eth_validate_addr,
        .ndo_select_queue       = bcm_select_queue,
};

static struct device_type wimax_type = {
        .name   = "wimax",
};

static int bcm_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
        cmd->supported          = 0;
        cmd->advertising        = 0;
        cmd->speed              = SPEED_10000;
        cmd->duplex             = DUPLEX_FULL;
        cmd->port               = PORT_TP;
        cmd->phy_address        = 0;
        cmd->transceiver        = XCVR_INTERNAL;
        cmd->autoneg            = AUTONEG_DISABLE;
        cmd->maxtxpkt           = 0;
        cmd->maxrxpkt           = 0;
        return 0;
}

static void bcm_get_drvinfo(struct net_device *dev,
                            struct ethtool_drvinfo *info)
{
        struct bcm_mini_adapter *Adapter = GET_BCM_ADAPTER(dev);
        struct bcm_interface_adapter *psIntfAdapter = Adapter->pvInterfaceAdapter;
        struct usb_device *udev = interface_to_usbdev(psIntfAdapter->interface);

        strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
        strlcpy(info->version, DRV_VERSION, sizeof(info->version));
        snprintf(info->fw_version, sizeof(info->fw_version), "%u.%u",
                 Adapter->uiFlashLayoutMajorVersion,
                 Adapter->uiFlashLayoutMinorVersion);

        usb_make_path(udev, info->bus_info, sizeof(info->bus_info));
}

static u32 bcm_get_link(struct net_device *dev)
{
        struct bcm_mini_adapter *Adapter = GET_BCM_ADAPTER(dev);

        return Adapter->LinkUpStatus;
}

static u32 bcm_get_msglevel(struct net_device *dev)
{
        struct bcm_mini_adapter *Adapter = GET_BCM_ADAPTER(dev);

        return Adapter->msg_enable;
}

static void bcm_set_msglevel(struct net_device *dev, u32 level)
{
        struct bcm_mini_adapter *Adapter = GET_BCM_ADAPTER(dev);

        Adapter->msg_enable = level;
}

static const struct ethtool_ops bcm_ethtool_ops = {
        .get_settings   = bcm_get_settings,
        .get_drvinfo    = bcm_get_drvinfo,
        .get_link       = bcm_get_link,
        .get_msglevel   = bcm_get_msglevel,
        .set_msglevel   = bcm_set_msglevel,
};

int register_networkdev(struct bcm_mini_adapter *Adapter)
{
        struct net_device *net = Adapter->dev;
        struct bcm_interface_adapter *IntfAdapter = Adapter->pvInterfaceAdapter;
        struct usb_interface *udev = IntfAdapter->interface;
        struct usb_device *xdev = IntfAdapter->udev;

        int result;

        net->netdev_ops = &bcmNetDevOps;
        net->ethtool_ops = &bcm_ethtool_ops;
        net->mtu = MTU_SIZE;    /* 1400 Bytes */
        net->tx_queue_len = TX_QLEN;
        net->flags |= IFF_NOARP;

        netif_carrier_off(net);

        SET_NETDEV_DEVTYPE(net, &wimax_type);

        /* Read the MAC Address from EEPROM */
        result = ReadMacAddressFromNVM(Adapter);
        if (result != STATUS_SUCCESS) {
                dev_err(&udev->dev,
                        PFX "Error in Reading the mac Address: %d", result);
                return -EIO;
        }

        result = register_netdev(net);
        if (result)
                return result;

        gblpnetdev = Adapter->dev;

        if (netif_msg_probe(Adapter))
                dev_info(&udev->dev, PFX "%s: register usb-%s-%s %pM\n",
                         net->name, xdev->bus->bus_name, xdev->devpath,
                         net->dev_addr);

        return 0;
}

void unregister_networkdev(struct bcm_mini_adapter *Adapter)
{
        struct net_device *net = Adapter->dev;
        struct bcm_interface_adapter *IntfAdapter = Adapter->pvInterfaceAdapter;
        struct usb_interface *udev = IntfAdapter->interface;
        struct usb_device *xdev = IntfAdapter->udev;

        if (netif_msg_probe(Adapter))
                dev_info(&udev->dev, PFX "%s: unregister usb-%s%s\n",
                         net->name, xdev->bus->bus_name, xdev->devpath);

        unregister_netdev(Adapter->dev);
}