vxge-main.c

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/******************************************************************************
* This software may be used and distributed according to the terms of
* the GNU General Public License (GPL), incorporated herein by reference.
* Drivers based on or derived from this code fall under the GPL and must
* retain the authorship, copyright and license notice.  This file is not
* a complete program and may only be used when the entire operating
* system is licensed under the GPL.
* See the file COPYING in this distribution for more information.
*
* vxge-main.c: Driver for Exar Corp's X3100 Series 10GbE PCIe I/O
*              Virtualized Server Adapter.
* Copyright(c) 2002-2010 Exar Corp.
*
* The module loadable parameters that are supported by the driver and a brief
* explanation of all the variables:
* vlan_tag_strip:
*   Strip VLAN Tag enable/disable. Instructs the device to remove
*   the VLAN tag from all received tagged frames that are not
*   replicated at the internal L2 switch.
*       0 - Do not strip the VLAN tag.
*       1 - Strip the VLAN tag.
*
* addr_learn_en:
*   Enable learning the mac address of the guest OS interface in
*   a virtualization environment.
*       0 - DISABLE
*       1 - ENABLE
*
* max_config_port:
*   Maximum number of port to be supported.
*       MIN -1 and MAX - 2
*
* max_config_vpath:
*   This configures the maximum no of VPATH configures for each
*   device function.
*       MIN - 1 and MAX - 17
*
* max_config_dev:
*   This configures maximum no of Device function to be enabled.
*       MIN - 1 and MAX - 17
*
******************************************************************************/

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/bitops.h>
#include <linux/if_vlan.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/tcp.h>
#include <net/ip.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/firmware.h>
#include <linux/net_tstamp.h>
#include <linux/prefetch.h>
#include <linux/module.h>
#include "vxge-main.h"
#include "vxge-reg.h"

MODULE_LICENSE("Dual BSD/GPL");
MODULE_DESCRIPTION("Neterion's X3100 Series 10GbE PCIe I/O"
    "Virtualized Server Adapter");

static DEFINE_PCI_DEVICE_TABLE(vxge_id_table) = {
    {PCI_VENDOR_ID_S2IO, PCI_DEVICE_ID_TITAN_WIN, PCI_ANY_ID,
    PCI_ANY_ID},
    {PCI_VENDOR_ID_S2IO, PCI_DEVICE_ID_TITAN_UNI, PCI_ANY_ID,
    PCI_ANY_ID},
    {0}
};

MODULE_DEVICE_TABLE(pci, vxge_id_table);

VXGE_MODULE_PARAM_INT(vlan_tag_strip, VXGE_HW_VPATH_RPA_STRIP_VLAN_TAG_ENABLE);
VXGE_MODULE_PARAM_INT(addr_learn_en, VXGE_HW_MAC_ADDR_LEARN_DEFAULT);
VXGE_MODULE_PARAM_INT(max_config_port, VXGE_MAX_CONFIG_PORT);
VXGE_MODULE_PARAM_INT(max_config_vpath, VXGE_USE_DEFAULT);
VXGE_MODULE_PARAM_INT(max_mac_vpath, VXGE_MAX_MAC_ADDR_COUNT);
VXGE_MODULE_PARAM_INT(max_config_dev, VXGE_MAX_CONFIG_DEV);

static u16 vpath_selector[VXGE_HW_MAX_VIRTUAL_PATHS] =
        {0, 1, 3, 3, 7, 7, 7, 7, 15, 15, 15, 15, 15, 15, 15, 15, 31};
static unsigned int bw_percentage[VXGE_HW_MAX_VIRTUAL_PATHS] =
    {[0 ...(VXGE_HW_MAX_VIRTUAL_PATHS - 1)] = 0xFF};
module_param_array(bw_percentage, uint, NULL, 0);

static struct vxge_drv_config *driver_config;

static inline int is_vxge_card_up(struct vxgedev *vdev)
{
    return test_bit(__VXGE_STATE_CARD_UP, &vdev->state);
}

static inline void VXGE_COMPLETE_VPATH_TX(struct vxge_fifo *fifo)
{
    struct sk_buff **skb_ptr = NULL;
    struct sk_buff **temp;
#define NR_SKB_COMPLETED 128
    struct sk_buff *completed[NR_SKB_COMPLETED];
    int more;

    do {
        more = 0;
        skb_ptr = completed;

        if (__netif_tx_trylock(fifo->txq)) {
            vxge_hw_vpath_poll_tx(fifo->handle, &skb_ptr,
                        NR_SKB_COMPLETED, &more);
            __netif_tx_unlock(fifo->txq);
        }

        /* free SKBs */
        for (temp = completed; temp != skb_ptr; temp++)
            dev_kfree_skb_irq(*temp);
    } while (more);
}

static inline void VXGE_COMPLETE_ALL_TX(struct vxgedev *vdev)
{
    int i;

    /* Complete all transmits */
    for (i = 0; i < vdev->no_of_vpath; i++)
        VXGE_COMPLETE_VPATH_TX(&vdev->vpaths[i].fifo);
}

static inline void VXGE_COMPLETE_ALL_RX(struct vxgedev *vdev)
{
    int i;
    struct vxge_ring *ring;

    /* Complete all receives*/
    for (i = 0; i < vdev->no_of_vpath; i++) {
        ring = &vdev->vpaths[i].ring;
        vxge_hw_vpath_poll_rx(ring->handle);
    }
}

/*
 * vxge_callback_link_up
 *
 * This function is called during interrupt context to notify link up state
 * change.
 */
static void vxge_callback_link_up(struct __vxge_hw_device *hldev)
{
    struct net_device *dev = hldev->ndev;
    struct vxgedev *vdev = netdev_priv(dev);

    vxge_debug_entryexit(VXGE_TRACE, "%s: %s:%d",
        vdev->ndev->name, __func__, __LINE__);
    netdev_notice(vdev->ndev, "Link Up\n");
    vdev->stats.link_up++;

    netif_carrier_on(vdev->ndev);
    netif_tx_wake_all_queues(vdev->ndev);

    vxge_debug_entryexit(VXGE_TRACE,
        "%s: %s:%d Exiting...", vdev->ndev->name, __func__, __LINE__);
}

/*
 * vxge_callback_link_down
 *
 * This function is called during interrupt context to notify link down state
 * change.
 */
static void vxge_callback_link_down(struct __vxge_hw_device *hldev)
{
    struct net_device *dev = hldev->ndev;
    struct vxgedev *vdev = netdev_priv(dev);

    vxge_debug_entryexit(VXGE_TRACE,
        "%s: %s:%d", vdev->ndev->name, __func__, __LINE__);
    netdev_notice(vdev->ndev, "Link Down\n");

    vdev->stats.link_down++;
    netif_carrier_off(vdev->ndev);
    netif_tx_stop_all_queues(vdev->ndev);

    vxge_debug_entryexit(VXGE_TRACE,
        "%s: %s:%d Exiting...", vdev->ndev->name, __func__, __LINE__);
}

/*
 * vxge_rx_alloc
 *
 * Allocate SKB.
 */
static struct sk_buff *
vxge_rx_alloc(void *dtrh, struct vxge_ring *ring, const int skb_size)
{
    struct net_device    *dev;
    struct sk_buff       *skb;
    struct vxge_rx_priv *rx_priv;

    dev = ring->ndev;
    vxge_debug_entryexit(VXGE_TRACE, "%s: %s:%d",
        ring->ndev->name, __func__, __LINE__);

    rx_priv = vxge_hw_ring_rxd_private_get(dtrh);

    /* try to allocate skb first. this one may fail */
    skb = netdev_alloc_skb(dev, skb_size +
    VXGE_HW_HEADER_ETHERNET_II_802_3_ALIGN);
    if (skb == NULL) {
        vxge_debug_mem(VXGE_ERR,
            "%s: out of memory to allocate SKB", dev->name);
        ring->stats.skb_alloc_fail++;
        return NULL;
    }

    vxge_debug_mem(VXGE_TRACE,
        "%s: %s:%d  Skb : 0x%p", ring->ndev->name,
        __func__, __LINE__, skb);

    skb_reserve(skb, VXGE_HW_HEADER_ETHERNET_II_802_3_ALIGN);

    rx_priv->skb = skb;
    rx_priv->skb_data = NULL;
    rx_priv->data_size = skb_size;
    vxge_debug_entryexit(VXGE_TRACE,
        "%s: %s:%d Exiting...", ring->ndev->name, __func__, __LINE__);

    return skb;
}

/*
 * vxge_rx_map
 */
static int vxge_rx_map(void *dtrh, struct vxge_ring *ring)
{
    struct vxge_rx_priv *rx_priv;
    dma_addr_t dma_addr;

    vxge_debug_entryexit(VXGE_TRACE, "%s: %s:%d",
        ring->ndev->name, __func__, __LINE__);
    rx_priv = vxge_hw_ring_rxd_private_get(dtrh);

    rx_priv->skb_data = rx_priv->skb->data;
    dma_addr = pci_map_single(ring->pdev, rx_priv->skb_data,
                rx_priv->data_size, PCI_DMA_FROMDEVICE);

    if (unlikely(pci_dma_mapping_error(ring->pdev, dma_addr))) {
        ring->stats.pci_map_fail++;
        return -EIO;
    }
    vxge_debug_mem(VXGE_TRACE,
        "%s: %s:%d  1 buffer mode dma_addr = 0x%llx",
        ring->ndev->name, __func__, __LINE__,
        (unsigned long long)dma_addr);
    vxge_hw_ring_rxd_1b_set(dtrh, dma_addr, rx_priv->data_size);

    rx_priv->data_dma = dma_addr;
    vxge_debug_entryexit(VXGE_TRACE,
        "%s: %s:%d Exiting...", ring->ndev->name, __func__, __LINE__);

    return 0;
}

/*
 * vxge_rx_initial_replenish
 * Allocation of RxD as an initial replenish procedure.
 */
static enum vxge_hw_status
vxge_rx_initial_replenish(void *dtrh, void *userdata)
{
    struct vxge_ring *ring = (struct vxge_ring *)userdata;
    struct vxge_rx_priv *rx_priv;

    vxge_debug_entryexit(VXGE_TRACE, "%s: %s:%d",
        ring->ndev->name, __func__, __LINE__);
    if (vxge_rx_alloc(dtrh, ring,
              VXGE_LL_MAX_FRAME_SIZE(ring->ndev)) == NULL)
        return VXGE_HW_FAIL;

    if (vxge_rx_map(dtrh, ring)) {
        rx_priv = vxge_hw_ring_rxd_private_get(dtrh);
        dev_kfree_skb(rx_priv->skb);

        return VXGE_HW_FAIL;
    }
    vxge_debug_entryexit(VXGE_TRACE,
        "%s: %s:%d Exiting...", ring->ndev->name, __func__, __LINE__);

    return VXGE_HW_OK;
}

static inline void
vxge_rx_complete(struct vxge_ring *ring, struct sk_buff *skb, u16 vlan,
         int pkt_length, struct vxge_hw_ring_rxd_info *ext_info)
{

    vxge_debug_entryexit(VXGE_TRACE, "%s: %s:%d",
            ring->ndev->name, __func__, __LINE__);
    skb_record_rx_queue(skb, ring->driver_id);
    skb->protocol = eth_type_trans(skb, ring->ndev);

    u64_stats_update_begin(&ring->stats.syncp);
    ring->stats.rx_frms++;
    ring->stats.rx_bytes += pkt_length;

    if (skb->pkt_type == PACKET_MULTICAST)
        ring->stats.rx_mcast++;
    u64_stats_update_end(&ring->stats.syncp);

    vxge_debug_rx(VXGE_TRACE,
        "%s: %s:%d  skb protocol = %d",
        ring->ndev->name, __func__, __LINE__, skb->protocol);

    if (ext_info->vlan &&
        ring->vlan_tag_strip == VXGE_HW_VPATH_RPA_STRIP_VLAN_TAG_ENABLE)
        __vlan_hwaccel_put_tag(skb, ext_info->vlan);
    napi_gro_receive(ring->napi_p, skb);

    vxge_debug_entryexit(VXGE_TRACE,
        "%s: %s:%d Exiting...", ring->ndev->name, __func__, __LINE__);
}

static inline void vxge_re_pre_post(void *dtr, struct vxge_ring *ring,
                    struct vxge_rx_priv *rx_priv)
{
    pci_dma_sync_single_for_device(ring->pdev,
        rx_priv->data_dma, rx_priv->data_size, PCI_DMA_FROMDEVICE);

    vxge_hw_ring_rxd_1b_set(dtr, rx_priv->data_dma, rx_priv->data_size);
    vxge_hw_ring_rxd_pre_post(ring->handle, dtr);
}

static inline void vxge_post(int *dtr_cnt, void **first_dtr,
                 void *post_dtr, struct __vxge_hw_ring *ringh)
{
    int dtr_count = *dtr_cnt;
    if ((*dtr_cnt % VXGE_HW_RXSYNC_FREQ_CNT) == 0) {
        if (*first_dtr)
            vxge_hw_ring_rxd_post_post_wmb(ringh, *first_dtr);
        *first_dtr = post_dtr;
    } else
        vxge_hw_ring_rxd_post_post(ringh, post_dtr);
    dtr_count++;
    *dtr_cnt = dtr_count;
}

/*
 * vxge_rx_1b_compl
 *
 * If the interrupt is because of a received frame or if the receive ring
 * contains fresh as yet un-processed frames, this function is called.
 */
static enum vxge_hw_status
vxge_rx_1b_compl(struct __vxge_hw_ring *ringh, void *dtr,
         u8 t_code, void *userdata)
{
    struct vxge_ring *ring = (struct vxge_ring *)userdata;
    struct net_device *dev = ring->ndev;
    unsigned int dma_sizes;
    void *first_dtr = NULL;
    int dtr_cnt = 0;
    int data_size;
    dma_addr_t data_dma;
    int pkt_length;
    struct sk_buff *skb;
    struct vxge_rx_priv *rx_priv;
    struct vxge_hw_ring_rxd_info ext_info;
    vxge_debug_entryexit(VXGE_TRACE, "%s: %s:%d",
        ring->ndev->name, __func__, __LINE__);

    do {
        prefetch((char *)dtr + L1_CACHE_BYTES);
        rx_priv = vxge_hw_ring_rxd_private_get(dtr);
        skb = rx_priv->skb;
        data_size = rx_priv->data_size;
        data_dma = rx_priv->data_dma;
        prefetch(rx_priv->skb_data);

        vxge_debug_rx(VXGE_TRACE,
            "%s: %s:%d  skb = 0x%p",
            ring->ndev->name, __func__, __LINE__, skb);

        vxge_hw_ring_rxd_1b_get(ringh, dtr, &dma_sizes);
        pkt_length = dma_sizes;

        pkt_length -= ETH_FCS_LEN;

        vxge_debug_rx(VXGE_TRACE,
            "%s: %s:%d  Packet Length = %d",
            ring->ndev->name, __func__, __LINE__, pkt_length);

        vxge_hw_ring_rxd_1b_info_get(ringh, dtr, &ext_info);

        /* check skb validity */
        vxge_assert(skb);

        prefetch((char *)skb + L1_CACHE_BYTES);
        if (unlikely(t_code)) {
            if (vxge_hw_ring_handle_tcode(ringh, dtr, t_code) !=
                VXGE_HW_OK) {

                ring->stats.rx_errors++;
                vxge_debug_rx(VXGE_TRACE,
                    "%s: %s :%d Rx T_code is %d",
                    ring->ndev->name, __func__,
                    __LINE__, t_code);

                /* If the t_code is not supported and if the
                 * t_code is other than 0x5 (unparseable packet
                 * such as unknown UPV6 header), Drop it !!!
                 */
                vxge_re_pre_post(dtr, ring, rx_priv);

                vxge_post(&dtr_cnt, &first_dtr, dtr, ringh);
                ring->stats.rx_dropped++;
                continue;
            }
        }

        if (pkt_length > VXGE_LL_RX_COPY_THRESHOLD) {
            if (vxge_rx_alloc(dtr, ring, data_size) != NULL) {
                if (!vxge_rx_map(dtr, ring)) {
                    skb_put(skb, pkt_length);

                    pci_unmap_single(ring->pdev, data_dma,
                        data_size, PCI_DMA_FROMDEVICE);

                    vxge_hw_ring_rxd_pre_post(ringh, dtr);
                    vxge_post(&dtr_cnt, &first_dtr, dtr,
                        ringh);
                } else {
                    dev_kfree_skb(rx_priv->skb);
                    rx_priv->skb = skb;
                    rx_priv->data_size = data_size;
                    vxge_re_pre_post(dtr, ring, rx_priv);

                    vxge_post(&dtr_cnt, &first_dtr, dtr,
                        ringh);
                    ring->stats.rx_dropped++;
                    break;
                }
            } else {
                vxge_re_pre_post(dtr, ring, rx_priv);

                vxge_post(&dtr_cnt, &first_dtr, dtr, ringh);
                ring->stats.rx_dropped++;
                break;
            }
        } else {
            struct sk_buff *skb_up;

            skb_up = netdev_alloc_skb(dev, pkt_length +
                VXGE_HW_HEADER_ETHERNET_II_802_3_ALIGN);
            if (skb_up != NULL) {
                skb_reserve(skb_up,
                    VXGE_HW_HEADER_ETHERNET_II_802_3_ALIGN);

                pci_dma_sync_single_for_cpu(ring->pdev,
                    data_dma, data_size,
                    PCI_DMA_FROMDEVICE);

                vxge_debug_mem(VXGE_TRACE,
                    "%s: %s:%d  skb_up = %p",
                    ring->ndev->name, __func__,
                    __LINE__, skb);
                memcpy(skb_up->data, skb->data, pkt_length);

                vxge_re_pre_post(dtr, ring, rx_priv);

                vxge_post(&dtr_cnt, &first_dtr, dtr,
                    ringh);
                /* will netif_rx small SKB instead */
                skb = skb_up;
                skb_put(skb, pkt_length);
            } else {
                vxge_re_pre_post(dtr, ring, rx_priv);

                vxge_post(&dtr_cnt, &first_dtr, dtr, ringh);
                vxge_debug_rx(VXGE_ERR,
                    "%s: vxge_rx_1b_compl: out of "
                    "memory", dev->name);
                ring->stats.skb_alloc_fail++;
                break;
            }
        }

        if ((ext_info.proto & VXGE_HW_FRAME_PROTO_TCP_OR_UDP) &&
            !(ext_info.proto & VXGE_HW_FRAME_PROTO_IP_FRAG) &&
            (dev->features & NETIF_F_RXCSUM) && /* Offload Rx side CSUM */
            ext_info.l3_cksum == VXGE_HW_L3_CKSUM_OK &&
            ext_info.l4_cksum == VXGE_HW_L4_CKSUM_OK)
            skb->ip_summed = CHECKSUM_UNNECESSARY;
        else
            skb_checksum_none_assert(skb);


        if (ring->rx_hwts) {
            struct skb_shared_hwtstamps *skb_hwts;
            u32 ns = *(u32 *)(skb->head + pkt_length);

            skb_hwts = skb_hwtstamps(skb);
            skb_hwts->hwtstamp = ns_to_ktime(ns);
            skb_hwts->syststamp.tv64 = 0;
        }

        /* rth_hash_type and rth_it_hit are non-zero regardless of
         * whether rss is enabled.  Only the rth_value is zero/non-zero
         * if rss is disabled/enabled, so key off of that.
         */
        if (ext_info.rth_value)
            skb->rxhash = ext_info.rth_value;

        vxge_rx_complete(ring, skb, ext_info.vlan,
            pkt_length, &ext_info);

        ring->budget--;
        ring->pkts_processed++;
        if (!ring->budget)
            break;

    } while (vxge_hw_ring_rxd_next_completed(ringh, &dtr,
        &t_code) == VXGE_HW_OK);

    if (first_dtr)
        vxge_hw_ring_rxd_post_post_wmb(ringh, first_dtr);

    vxge_debug_entryexit(VXGE_TRACE,
                "%s:%d  Exiting...",
                __func__, __LINE__);
    return VXGE_HW_OK;
}

/*
 * vxge_xmit_compl
 *
 * If an interrupt was raised to indicate DMA complete of the Tx packet,
 * this function is called. It identifies the last TxD whose buffer was
 * freed and frees all skbs whose data have already DMA'ed into the NICs
 * internal memory.
 */
static enum vxge_hw_status
vxge_xmit_compl(struct __vxge_hw_fifo *fifo_hw, void *dtr,
        enum vxge_hw_fifo_tcode t_code, void *userdata,
        struct sk_buff ***skb_ptr, int nr_skb, int *more)
{
    struct vxge_fifo *fifo = (struct vxge_fifo *)userdata;
    struct sk_buff *skb, **done_skb = *skb_ptr;
    int pkt_cnt = 0;

    vxge_debug_entryexit(VXGE_TRACE,
        "%s:%d Entered....", __func__, __LINE__);

    do {
        int frg_cnt;
        skb_frag_t *frag;
        int i = 0, j;
        struct vxge_tx_priv *txd_priv =
            vxge_hw_fifo_txdl_private_get(dtr);

        skb = txd_priv->skb;
        frg_cnt = skb_shinfo(skb)->nr_frags;
        frag = &skb_shinfo(skb)->frags[0];

        vxge_debug_tx(VXGE_TRACE,
                "%s: %s:%d fifo_hw = %p dtr = %p "
                "tcode = 0x%x", fifo->ndev->name, __func__,
                __LINE__, fifo_hw, dtr, t_code);
        /* check skb validity */
        vxge_assert(skb);
        vxge_debug_tx(VXGE_TRACE,
            "%s: %s:%d skb = %p itxd_priv = %p frg_cnt = %d",
            fifo->ndev->name, __func__, __LINE__,
            skb, txd_priv, frg_cnt);
        if (unlikely(t_code)) {
            fifo->stats.tx_errors++;
            vxge_debug_tx(VXGE_ERR,
                "%s: tx: dtr %p completed due to "
                "error t_code %01x", fifo->ndev->name,
                dtr, t_code);
            vxge_hw_fifo_handle_tcode(fifo_hw, dtr, t_code);
        }

        /*  for unfragmented skb */
        pci_unmap_single(fifo->pdev, txd_priv->dma_buffers[i++],
                skb_headlen(skb), PCI_DMA_TODEVICE);

        for (j = 0; j < frg_cnt; j++) {
            pci_unmap_page(fifo->pdev,
                    txd_priv->dma_buffers[i++],
                    skb_frag_size(frag), PCI_DMA_TODEVICE);
            frag += 1;
        }

        vxge_hw_fifo_txdl_free(fifo_hw, dtr);

        /* Updating the statistics block */
        u64_stats_update_begin(&fifo->stats.syncp);
        fifo->stats.tx_frms++;
        fifo->stats.tx_bytes += skb->len;
        u64_stats_update_end(&fifo->stats.syncp);

        *done_skb++ = skb;

        if (--nr_skb <= 0) {
            *more = 1;
            break;
        }

        pkt_cnt++;
        if (pkt_cnt > fifo->indicate_max_pkts)
            break;

    } while (vxge_hw_fifo_txdl_next_completed(fifo_hw,
                &dtr, &t_code) == VXGE_HW_OK);

    *skb_ptr = done_skb;
    if (netif_tx_queue_stopped(fifo->txq))
        netif_tx_wake_queue(fifo->txq);

    vxge_debug_entryexit(VXGE_TRACE,
                "%s: %s:%d  Exiting...",
                fifo->ndev->name, __func__, __LINE__);
    return VXGE_HW_OK;
}

/* select a vpath to transmit the packet */
static u32 vxge_get_vpath_no(struct vxgedev *vdev, struct sk_buff *skb)
{
    u16 queue_len, counter = 0;
    if (skb->protocol == htons(ETH_P_IP)) {
        struct iphdr *ip;
        struct tcphdr *th;

        ip = ip_hdr(skb);

        if (!ip_is_fragment(ip)) {
            th = (struct tcphdr *)(((unsigned char *)ip) +
                    ip->ihl*4);

            queue_len = vdev->no_of_vpath;
            counter = (ntohs(th->source) +
                ntohs(th->dest)) &
                vdev->vpath_selector[queue_len - 1];
            if (counter >= queue_len)
                counter = queue_len - 1;
        }
    }
    return counter;
}

static enum vxge_hw_status vxge_search_mac_addr_in_list(
    struct vxge_vpath *vpath, u64 del_mac)
{
    struct list_head *entry, *next;
    list_for_each_safe(entry, next, &vpath->mac_addr_list) {
        if (((struct vxge_mac_addrs *)entry)->macaddr == del_mac)
            return TRUE;
    }
    return FALSE;
}

static int vxge_mac_list_add(struct vxge_vpath *vpath, struct macInfo *mac)
{
    struct vxge_mac_addrs *new_mac_entry;
    u8 *mac_address = NULL;

    if (vpath->mac_addr_cnt >= VXGE_MAX_LEARN_MAC_ADDR_CNT)
        return TRUE;

    new_mac_entry = kzalloc(sizeof(struct vxge_mac_addrs), GFP_ATOMIC);
    if (!new_mac_entry) {
        vxge_debug_mem(VXGE_ERR,
            "%s: memory allocation failed",
            VXGE_DRIVER_NAME);
        return FALSE;
    }

    list_add(&new_mac_entry->item, &vpath->mac_addr_list);

    /* Copy the new mac address to the list */
    mac_address = (u8 *)&new_mac_entry->macaddr;
    memcpy(mac_address, mac->macaddr, ETH_ALEN);

    new_mac_entry->state = mac->state;
    vpath->mac_addr_cnt++;

    if (is_multicast_ether_addr(mac->macaddr))
        vpath->mcast_addr_cnt++;

    return TRUE;
}

/* Add a mac address to DA table */
static enum vxge_hw_status
vxge_add_mac_addr(struct vxgedev *vdev, struct macInfo *mac)
{
    enum vxge_hw_status status = VXGE_HW_OK;
    struct vxge_vpath *vpath;
    enum vxge_hw_vpath_mac_addr_add_mode duplicate_mode;

    if (is_multicast_ether_addr(mac->macaddr))
        duplicate_mode = VXGE_HW_VPATH_MAC_ADDR_ADD_DUPLICATE;
    else
        duplicate_mode = VXGE_HW_VPATH_MAC_ADDR_REPLACE_DUPLICATE;

    vpath = &vdev->vpaths[mac->vpath_no];
    status = vxge_hw_vpath_mac_addr_add(vpath->handle, mac->macaddr,
                        mac->macmask, duplicate_mode);
    if (status != VXGE_HW_OK) {
        vxge_debug_init(VXGE_ERR,
            "DA config add entry failed for vpath:%d",
            vpath->device_id);
    } else
        if (FALSE == vxge_mac_list_add(vpath, mac))
            status = -EPERM;

    return status;
}

static int vxge_learn_mac(struct vxgedev *vdev, u8 *mac_header)
{
    struct macInfo mac_info;
    u8 *mac_address = NULL;
    u64 mac_addr = 0, vpath_vector = 0;
    int vpath_idx = 0;
    enum vxge_hw_status status = VXGE_HW_OK;
    struct vxge_vpath *vpath = NULL;
    struct __vxge_hw_device *hldev;

    hldev = pci_get_drvdata(vdev->pdev);

    mac_address = (u8 *)&mac_addr;
    memcpy(mac_address, mac_header, ETH_ALEN);

    /* Is this mac address already in the list? */
    for (vpath_idx = 0; vpath_idx < vdev->no_of_vpath; vpath_idx++) {
        vpath = &vdev->vpaths[vpath_idx];
        if (vxge_search_mac_addr_in_list(vpath, mac_addr))
            return vpath_idx;
    }

    memset(&mac_info, 0, sizeof(struct macInfo));
    memcpy(mac_info.macaddr, mac_header, ETH_ALEN);

    /* Any vpath has room to add mac address to its da table? */
    for (vpath_idx = 0; vpath_idx < vdev->no_of_vpath; vpath_idx++) {
        vpath = &vdev->vpaths[vpath_idx];
        if (vpath->mac_addr_cnt < vpath->max_mac_addr_cnt) {
            /* Add this mac address to this vpath */
            mac_info.vpath_no = vpath_idx;
            mac_info.state = VXGE_LL_MAC_ADDR_IN_DA_TABLE;
            status = vxge_add_mac_addr(vdev, &mac_info);
            if (status != VXGE_HW_OK)
                return -EPERM;
            return vpath_idx;
        }
    }

    mac_info.state = VXGE_LL_MAC_ADDR_IN_LIST;
    vpath_idx = 0;
    mac_info.vpath_no = vpath_idx;
    /* Is the first vpath already selected as catch-basin ? */
    vpath = &vdev->vpaths[vpath_idx];
    if (vpath->mac_addr_cnt > vpath->max_mac_addr_cnt) {
        /* Add this mac address to this vpath */
        if (FALSE == vxge_mac_list_add(vpath, &mac_info))
            return -EPERM;
        return vpath_idx;
    }

    /* Select first vpath as catch-basin */
    vpath_vector = vxge_mBIT(vpath->device_id);
    status = vxge_hw_mgmt_reg_write(vpath->vdev->devh,
                vxge_hw_mgmt_reg_type_mrpcim,
                0,
                (ulong)offsetof(
                    struct vxge_hw_mrpcim_reg,
                    rts_mgr_cbasin_cfg),
                vpath_vector);
    if (status != VXGE_HW_OK) {
        vxge_debug_tx(VXGE_ERR,
            "%s: Unable to set the vpath-%d in catch-basin mode",
            VXGE_DRIVER_NAME, vpath->device_id);
        return -EPERM;
    }

    if (FALSE == vxge_mac_list_add(vpath, &mac_info))
        return -EPERM;

    return vpath_idx;
}

static netdev_tx_t
vxge_xmit(struct sk_buff *skb, struct net_device *dev)
{
    struct vxge_fifo *fifo = NULL;
    void *dtr_priv;
    void *dtr = NULL;
    struct vxgedev *vdev = NULL;
    enum vxge_hw_status status;
    int frg_cnt, first_frg_len;
    skb_frag_t *frag;
    int i = 0, j = 0, avail;
    u64 dma_pointer;
    struct vxge_tx_priv *txdl_priv = NULL;
    struct __vxge_hw_fifo *fifo_hw;
    int offload_type;
    int vpath_no = 0;

    vxge_debug_entryexit(VXGE_TRACE, "%s: %s:%d",
            dev->name, __func__, __LINE__);

    /* A buffer with no data will be dropped */
    if (unlikely(skb->len <= 0)) {
        vxge_debug_tx(VXGE_ERR,
            "%s: Buffer has no data..", dev->name);
        dev_kfree_skb(skb);
        return NETDEV_TX_OK;
    }

    vdev = netdev_priv(dev);

    if (unlikely(!is_vxge_card_up(vdev))) {
        vxge_debug_tx(VXGE_ERR,
            "%s: vdev not initialized", dev->name);
        dev_kfree_skb(skb);
        return NETDEV_TX_OK;
    }

    if (vdev->config.addr_learn_en) {
        vpath_no = vxge_learn_mac(vdev, skb->data + ETH_ALEN);
        if (vpath_no == -EPERM) {
            vxge_debug_tx(VXGE_ERR,
                "%s: Failed to store the mac address",
                dev->name);
            dev_kfree_skb(skb);
            return NETDEV_TX_OK;
        }
    }

    if (vdev->config.tx_steering_type == TX_MULTIQ_STEERING)
        vpath_no = skb_get_queue_mapping(skb);
    else if (vdev->config.tx_steering_type == TX_PORT_STEERING)
        vpath_no = vxge_get_vpath_no(vdev, skb);

    vxge_debug_tx(VXGE_TRACE, "%s: vpath_no= %d", dev->name, vpath_no);

    if (vpath_no >= vdev->no_of_vpath)
        vpath_no = 0;

    fifo = &vdev->vpaths[vpath_no].fifo;
    fifo_hw = fifo->handle;

    if (netif_tx_queue_stopped(fifo->txq))
        return NETDEV_TX_BUSY;

    avail = vxge_hw_fifo_free_txdl_count_get(fifo_hw);
    if (avail == 0) {
        vxge_debug_tx(VXGE_ERR,
            "%s: No free TXDs available", dev->name);
        fifo->stats.txd_not_free++;
        goto _exit0;
    }

    /* Last TXD?  Stop tx queue to avoid dropping packets.  TX
     * completion will resume the queue.
     */
    if (avail == 1)
        netif_tx_stop_queue(fifo->txq);

    status = vxge_hw_fifo_txdl_reserve(fifo_hw, &dtr, &dtr_priv);
    if (unlikely(status != VXGE_HW_OK)) {
        vxge_debug_tx(VXGE_ERR,
           "%s: Out of descriptors .", dev->name);
        fifo->stats.txd_out_of_desc++;
        goto _exit0;
    }

    vxge_debug_tx(VXGE_TRACE,
        "%s: %s:%d fifo_hw = %p dtr = %p dtr_priv = %p",
        dev->name, __func__, __LINE__,
        fifo_hw, dtr, dtr_priv);

    if (vlan_tx_tag_present(skb)) {
        u16 vlan_tag = vlan_tx_tag_get(skb);
        vxge_hw_fifo_txdl_vlan_set(dtr, vlan_tag);
    }

    first_frg_len = skb_headlen(skb);

    dma_pointer = pci_map_single(fifo->pdev, skb->data, first_frg_len,
                PCI_DMA_TODEVICE);

    if (unlikely(pci_dma_mapping_error(fifo->pdev, dma_pointer))) {
        vxge_hw_fifo_txdl_free(fifo_hw, dtr);
        fifo->stats.pci_map_fail++;
        goto _exit0;
    }

    txdl_priv = vxge_hw_fifo_txdl_private_get(dtr);
    txdl_priv->skb = skb;
    txdl_priv->dma_buffers[j] = dma_pointer;

    frg_cnt = skb_shinfo(skb)->nr_frags;
    vxge_debug_tx(VXGE_TRACE,
            "%s: %s:%d skb = %p txdl_priv = %p "
            "frag_cnt = %d dma_pointer = 0x%llx", dev->name,
            __func__, __LINE__, skb, txdl_priv,
            frg_cnt, (unsigned long long)dma_pointer);

    vxge_hw_fifo_txdl_buffer_set(fifo_hw, dtr, j++, dma_pointer,
        first_frg_len);

    frag = &skb_shinfo(skb)->frags[0];
    for (i = 0; i < frg_cnt; i++) {
        /* ignore 0 length fragment */
        if (!skb_frag_size(frag))
            continue;

        dma_pointer = (u64)skb_frag_dma_map(&fifo->pdev->dev, frag,
                            0, skb_frag_size(frag),
                            DMA_TO_DEVICE);

        if (unlikely(dma_mapping_error(&fifo->pdev->dev, dma_pointer)))
            goto _exit2;
        vxge_debug_tx(VXGE_TRACE,
            "%s: %s:%d frag = %d dma_pointer = 0x%llx",
                dev->name, __func__, __LINE__, i,
                (unsigned long long)dma_pointer);

        txdl_priv->dma_buffers[j] = dma_pointer;
        vxge_hw_fifo_txdl_buffer_set(fifo_hw, dtr, j++, dma_pointer,
                    skb_frag_size(frag));
        frag += 1;
    }

    offload_type = vxge_offload_type(skb);

    if (offload_type & (SKB_GSO_TCPV4 | SKB_GSO_TCPV6)) {
        int mss = vxge_tcp_mss(skb);
        if (mss) {
            vxge_debug_tx(VXGE_TRACE, "%s: %s:%d mss = %d",
                dev->name, __func__, __LINE__, mss);
            vxge_hw_fifo_txdl_mss_set(dtr, mss);
        } else {
            vxge_assert(skb->len <=
                dev->mtu + VXGE_HW_MAC_HEADER_MAX_SIZE);
            vxge_assert(0);
            goto _exit1;
        }
    }

    if (skb->ip_summed == CHECKSUM_PARTIAL)
        vxge_hw_fifo_txdl_cksum_set_bits(dtr,
                    VXGE_HW_FIFO_TXD_TX_CKO_IPV4_EN |
                    VXGE_HW_FIFO_TXD_TX_CKO_TCP_EN |
                    VXGE_HW_FIFO_TXD_TX_CKO_UDP_EN);

    vxge_hw_fifo_txdl_post(fifo_hw, dtr);

    vxge_debug_entryexit(VXGE_TRACE, "%s: %s:%d  Exiting...",
        dev->name, __func__, __LINE__);
    return NETDEV_TX_OK;

_exit2:
    vxge_debug_tx(VXGE_TRACE, "%s: pci_map_page failed", dev->name);
_exit1:
    j = 0;
    frag = &skb_shinfo(skb)->frags[0];

    pci_unmap_single(fifo->pdev, txdl_priv->dma_buffers[j++],
            skb_headlen(skb), PCI_DMA_TODEVICE);

    for (; j < i; j++) {
        pci_unmap_page(fifo->pdev, txdl_priv->dma_buffers[j],
            skb_frag_size(frag), PCI_DMA_TODEVICE);
        frag += 1;
    }

    vxge_hw_fifo_txdl_free(fifo_hw, dtr);
_exit0:
    netif_tx_stop_queue(fifo->txq);
    dev_kfree_skb(skb);

    return NETDEV_TX_OK;
}

/*
 * vxge_rx_term
 *
 * Function will be called by hw function to abort all outstanding receive
 * descriptors.
 */
static void
vxge_rx_term(void *dtrh, enum vxge_hw_rxd_state state, void *userdata)
{
    struct vxge_ring *ring = (struct vxge_ring *)userdata;
    struct vxge_rx_priv *rx_priv =
        vxge_hw_ring_rxd_private_get(dtrh);

    vxge_debug_entryexit(VXGE_TRACE, "%s: %s:%d",
            ring->ndev->name, __func__, __LINE__);
    if (state != VXGE_HW_RXD_STATE_POSTED)
        return;

    pci_unmap_single(ring->pdev, rx_priv->data_dma,
        rx_priv->data_size, PCI_DMA_FROMDEVICE);

    dev_kfree_skb(rx_priv->skb);
    rx_priv->skb_data = NULL;

    vxge_debug_entryexit(VXGE_TRACE,
        "%s: %s:%d  Exiting...",
        ring->ndev->name, __func__, __LINE__);
}

/*
 * vxge_tx_term
 *
 * Function will be called to abort all outstanding tx descriptors
 */
static void
vxge_tx_term(void *dtrh, enum vxge_hw_txdl_state state, void *userdata)
{
    struct vxge_fifo *fifo = (struct vxge_fifo *)userdata;
    skb_frag_t *frag;
    int i = 0, j, frg_cnt;
    struct vxge_tx_priv *txd_priv = vxge_hw_fifo_txdl_private_get(dtrh);
    struct sk_buff *skb = txd_priv->skb;

    vxge_debug_entryexit(VXGE_TRACE, "%s:%d", __func__, __LINE__);

    if (state != VXGE_HW_TXDL_STATE_POSTED)
        return;

    /* check skb validity */
    vxge_assert(skb);
    frg_cnt = skb_shinfo(skb)->nr_frags;
    frag = &skb_shinfo(skb)->frags[0];

    /*  for unfragmented skb */
    pci_unmap_single(fifo->pdev, txd_priv->dma_buffers[i++],
        skb_headlen(skb), PCI_DMA_TODEVICE);

    for (j = 0; j < frg_cnt; j++) {
        pci_unmap_page(fifo->pdev, txd_priv->dma_buffers[i++],
                   skb_frag_size(frag), PCI_DMA_TODEVICE);
        frag += 1;
    }

    dev_kfree_skb(skb);

    vxge_debug_entryexit(VXGE_TRACE,
        "%s:%d  Exiting...", __func__, __LINE__);
}

static int vxge_mac_list_del(struct vxge_vpath *vpath, struct macInfo *mac)
{
    struct list_head *entry, *next;
    u64 del_mac = 0;
    u8 *mac_address = (u8 *) (&del_mac);

    /* Copy the mac address to delete from the list */
    memcpy(mac_address, mac->macaddr, ETH_ALEN);

    list_for_each_safe(entry, next, &vpath->mac_addr_list) {
        if (((struct vxge_mac_addrs *)entry)->macaddr == del_mac) {
            list_del(entry);
            kfree((struct vxge_mac_addrs *)entry);
            vpath->mac_addr_cnt--;

            if (is_multicast_ether_addr(mac->macaddr))
                vpath->mcast_addr_cnt--;
            return TRUE;
        }
    }

    return FALSE;
}

/* delete a mac address from DA table */
static enum vxge_hw_status
vxge_del_mac_addr(struct vxgedev *vdev, struct macInfo *mac)
{
    enum vxge_hw_status status = VXGE_HW_OK;
    struct vxge_vpath *vpath;

    vpath = &vdev->vpaths[mac->vpath_no];
    status = vxge_hw_vpath_mac_addr_delete(vpath->handle, mac->macaddr,
                        mac->macmask);
    if (status != VXGE_HW_OK) {
        vxge_debug_init(VXGE_ERR,
            "DA config delete entry failed for vpath:%d",
            vpath->device_id);
    } else
        vxge_mac_list_del(vpath, mac);
    return status;
}

static void vxge_set_multicast(struct net_device *dev)
{
    struct netdev_hw_addr *ha;
    struct vxgedev *vdev;
    int i, mcast_cnt = 0;
    struct __vxge_hw_device *hldev;
    struct vxge_vpath *vpath;
    enum vxge_hw_status status = VXGE_HW_OK;
    struct macInfo mac_info;
    int vpath_idx = 0;
    struct vxge_mac_addrs *mac_entry;
    struct list_head *list_head;
    struct list_head *entry, *next;
    u8 *mac_address = NULL;

    vxge_debug_entryexit(VXGE_TRACE,
        "%s:%d", __func__, __LINE__);

    vdev = netdev_priv(dev);
    hldev = vdev->devh;

    if (unlikely(!is_vxge_card_up(vdev)))
        return;

    if ((dev->flags & IFF_ALLMULTI) && (!vdev->all_multi_flg)) {
        for (i = 0; i < vdev->no_of_vpath; i++) {
            vpath = &vdev->vpaths[i];
            vxge_assert(vpath->is_open);
            status = vxge_hw_vpath_mcast_enable(vpath->handle);
            if (status != VXGE_HW_OK)
                vxge_debug_init(VXGE_ERR, "failed to enable "
                        "multicast, status %d", status);
            vdev->all_multi_flg = 1;
        }
    } else if (!(dev->flags & IFF_ALLMULTI) && (vdev->all_multi_flg)) {
        for (i = 0; i < vdev->no_of_vpath; i++) {
            vpath = &vdev->vpaths[i];
            vxge_assert(vpath->is_open);
            status = vxge_hw_vpath_mcast_disable(vpath->handle);
            if (status != VXGE_HW_OK)
                vxge_debug_init(VXGE_ERR, "failed to disable "
                        "multicast, status %d", status);
            vdev->all_multi_flg = 0;
        }
    }


    if (!vdev->config.addr_learn_en) {
        for (i = 0; i < vdev->no_of_vpath; i++) {
            vpath = &vdev->vpaths[i];
            vxge_assert(vpath->is_open);

            if (dev->flags & IFF_PROMISC)
                status = vxge_hw_vpath_promisc_enable(
                    vpath->handle);
            else
                status = vxge_hw_vpath_promisc_disable(
                    vpath->handle);
            if (status != VXGE_HW_OK)
                vxge_debug_init(VXGE_ERR, "failed to %s promisc"
                    ", status %d", dev->flags&IFF_PROMISC ?
                    "enable" : "disable", status);
        }
    }

    memset(&mac_info, 0, sizeof(struct macInfo));
    /* Update individual M_CAST address list */
    if ((!vdev->all_multi_flg) && netdev_mc_count(dev)) {
        mcast_cnt = vdev->vpaths[0].mcast_addr_cnt;
        list_head = &vdev->vpaths[0].mac_addr_list;
        if ((netdev_mc_count(dev) +
            (vdev->vpaths[0].mac_addr_cnt - mcast_cnt)) >
                vdev->vpaths[0].max_mac_addr_cnt)
            goto _set_all_mcast;

        /* Delete previous MC's */
        for (i = 0; i < mcast_cnt; i++) {
            list_for_each_safe(entry, next, list_head) {
                mac_entry = (struct vxge_mac_addrs *)entry;
                /* Copy the mac address to delete */
                mac_address = (u8 *)&mac_entry->macaddr;
                memcpy(mac_info.macaddr, mac_address, ETH_ALEN);

                if (is_multicast_ether_addr(mac_info.macaddr)) {
                    for (vpath_idx = 0; vpath_idx <
                        vdev->no_of_vpath;
                        vpath_idx++) {
                        mac_info.vpath_no = vpath_idx;
                        status = vxge_del_mac_addr(
                                vdev,
                                &mac_info);
                    }
                }
            }
        }

        /* Add new ones */
        netdev_for_each_mc_addr(ha, dev) {
            memcpy(mac_info.macaddr, ha->addr, ETH_ALEN);
            for (vpath_idx = 0; vpath_idx < vdev->no_of_vpath;
                    vpath_idx++) {
                mac_info.vpath_no = vpath_idx;
                mac_info.state = VXGE_LL_MAC_ADDR_IN_DA_TABLE;
                status = vxge_add_mac_addr(vdev, &mac_info);
                if (status != VXGE_HW_OK) {
                    vxge_debug_init(VXGE_ERR,
                        "%s:%d Setting individual"
                        "multicast address failed",
                        __func__, __LINE__);
                    goto _set_all_mcast;
                }
            }
        }

        return;
_set_all_mcast:
        mcast_cnt = vdev->vpaths[0].mcast_addr_cnt;
        /* Delete previous MC's */
        for (i = 0; i < mcast_cnt; i++) {
            list_for_each_safe(entry, next, list_head) {
                mac_entry = (struct vxge_mac_addrs *)entry;
                /* Copy the mac address to delete */
                mac_address = (u8 *)&mac_entry->macaddr;
                memcpy(mac_info.macaddr, mac_address, ETH_ALEN);

                if (is_multicast_ether_addr(mac_info.macaddr))
                    break;
            }

            for (vpath_idx = 0; vpath_idx < vdev->no_of_vpath;
                    vpath_idx++) {
                mac_info.vpath_no = vpath_idx;
                status = vxge_del_mac_addr(vdev, &mac_info);
            }
        }

        /* Enable all multicast */
        for (i = 0; i < vdev->no_of_vpath; i++) {
            vpath = &vdev->vpaths[i];
            vxge_assert(vpath->is_open);

            status = vxge_hw_vpath_mcast_enable(vpath->handle);
            if (status != VXGE_HW_OK) {
                vxge_debug_init(VXGE_ERR,
                    "%s:%d Enabling all multicasts failed",
                     __func__, __LINE__);
            }
            vdev->all_multi_flg = 1;
        }
        dev->flags |= IFF_ALLMULTI;
    }

    vxge_debug_entryexit(VXGE_TRACE,
        "%s:%d  Exiting...", __func__, __LINE__);
}

static int vxge_set_mac_addr(struct net_device *dev, void *p)
{
    struct sockaddr *addr = p;
    struct vxgedev *vdev;
    struct __vxge_hw_device *hldev;
    enum vxge_hw_status status = VXGE_HW_OK;
    struct macInfo mac_info_new, mac_info_old;
    int vpath_idx = 0;

    vxge_debug_entryexit(VXGE_TRACE, "%s:%d", __func__, __LINE__);

    vdev = netdev_priv(dev);
    hldev = vdev->devh;

    if (!is_valid_ether_addr(addr->sa_data))
        return -EINVAL;

    memset(&mac_info_new, 0, sizeof(struct macInfo));
    memset(&mac_info_old, 0, sizeof(struct macInfo));

    vxge_debug_entryexit(VXGE_TRACE, "%s:%d  Exiting...",
        __func__, __LINE__);

    /* Get the old address */
    memcpy(mac_info_old.macaddr, dev->dev_addr, dev->addr_len);

    /* Copy the new address */
    memcpy(mac_info_new.macaddr, addr->sa_data, dev->addr_len);

    /* First delete the old mac address from all the vpaths
    as we can't specify the index while adding new mac address */
    for (vpath_idx = 0; vpath_idx < vdev->no_of_vpath; vpath_idx++) {
        struct vxge_vpath *vpath = &vdev->vpaths[vpath_idx];
        if (!vpath->is_open) {
            /* This can happen when this interface is added/removed
            to the bonding interface. Delete this station address
            from the linked list */
            vxge_mac_list_del(vpath, &mac_info_old);

            /* Add this new address to the linked list
            for later restoring */
            vxge_mac_list_add(vpath, &mac_info_new);

            continue;
        }
        /* Delete the station address */
        mac_info_old.vpath_no = vpath_idx;
        status = vxge_del_mac_addr(vdev, &mac_info_old);
    }

    if (unlikely(!is_vxge_card_up(vdev))) {
        memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
        return VXGE_HW_OK;
    }

    /* Set this mac address to all the vpaths */
    for (vpath_idx = 0; vpath_idx < vdev->no_of_vpath; vpath_idx++) {
        mac_info_new.vpath_no = vpath_idx;
        mac_info_new.state = VXGE_LL_MAC_ADDR_IN_DA_TABLE;
        status = vxge_add_mac_addr(vdev, &mac_info_new);
        if (status != VXGE_HW_OK)
            return -EINVAL;
    }

    memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);

    return status;
}

/*
 * vxge_vpath_intr_enable
 * @vdev: pointer to vdev
 * @vp_id: vpath for which to enable the interrupts
 *
 * Enables the interrupts for the vpath
*/
static void vxge_vpath_intr_enable(struct vxgedev *vdev, int vp_id)
{
    struct vxge_vpath *vpath = &vdev->vpaths[vp_id];
    int msix_id = 0;
    int tim_msix_id[4] = {0, 1, 0, 0};
    int alarm_msix_id = VXGE_ALARM_MSIX_ID;

    vxge_hw_vpath_intr_enable(vpath->handle);

    if (vdev->config.intr_type == INTA)
        vxge_hw_vpath_inta_unmask_tx_rx(vpath->handle);
    else {
        vxge_hw_vpath_msix_set(vpath->handle, tim_msix_id,
            alarm_msix_id);

        msix_id = vpath->device_id * VXGE_HW_VPATH_MSIX_ACTIVE;
        vxge_hw_vpath_msix_unmask(vpath->handle, msix_id);
        vxge_hw_vpath_msix_unmask(vpath->handle, msix_id + 1);

        /* enable the alarm vector */
        msix_id = (vpath->handle->vpath->hldev->first_vp_id *
            VXGE_HW_VPATH_MSIX_ACTIVE) + alarm_msix_id;
        vxge_hw_vpath_msix_unmask(vpath->handle, msix_id);
    }
}

/*
 * vxge_vpath_intr_disable
 * @vdev: pointer to vdev
 * @vp_id: vpath for which to disable the interrupts
 *
 * Disables the interrupts for the vpath
*/
static void vxge_vpath_intr_disable(struct vxgedev *vdev, int vp_id)
{
    struct vxge_vpath *vpath = &vdev->vpaths[vp_id];
    struct __vxge_hw_device *hldev;
    int msix_id;

    hldev = pci_get_drvdata(vdev->pdev);

    vxge_hw_vpath_wait_receive_idle(hldev, vpath->device_id);

    vxge_hw_vpath_intr_disable(vpath->handle);

    if (vdev->config.intr_type == INTA)
        vxge_hw_vpath_inta_mask_tx_rx(vpath->handle);
    else {
        msix_id = vpath->device_id * VXGE_HW_VPATH_MSIX_ACTIVE;
        vxge_hw_vpath_msix_mask(vpath->handle, msix_id);
        vxge_hw_vpath_msix_mask(vpath->handle, msix_id + 1);

        /* disable the alarm vector */
        msix_id = (vpath->handle->vpath->hldev->first_vp_id *
            VXGE_HW_VPATH_MSIX_ACTIVE) + VXGE_ALARM_MSIX_ID;
        vxge_hw_vpath_msix_mask(vpath->handle, msix_id);
    }
}

/* list all mac addresses from DA table */
static enum vxge_hw_status
vxge_search_mac_addr_in_da_table(struct vxge_vpath *vpath, struct macInfo *mac)
{
    enum vxge_hw_status status = VXGE_HW_OK;
    unsigned char macmask[ETH_ALEN];
    unsigned char macaddr[ETH_ALEN];

    status = vxge_hw_vpath_mac_addr_get(vpath->handle,
                macaddr, macmask);
    if (status != VXGE_HW_OK) {
        vxge_debug_init(VXGE_ERR,
            "DA config list entry failed for vpath:%d",
            vpath->device_id);
        return status;
    }

    while (memcmp(mac->macaddr, macaddr, ETH_ALEN)) {
        status = vxge_hw_vpath_mac_addr_get_next(vpath->handle,
                macaddr, macmask);
        if (status != VXGE_HW_OK)
            break;
    }

    return status;
}

/* Store all mac addresses from the list to the DA table */
static enum vxge_hw_status vxge_restore_vpath_mac_addr(struct vxge_vpath *vpath)
{
    enum vxge_hw_status status = VXGE_HW_OK;
    struct macInfo mac_info;
    u8 *mac_address = NULL;
    struct list_head *entry, *next;

    memset(&mac_info, 0, sizeof(struct macInfo));

    if (vpath->is_open) {
        list_for_each_safe(entry, next, &vpath->mac_addr_list) {
            mac_address =
                (u8 *)&
                ((struct vxge_mac_addrs *)entry)->macaddr;
            memcpy(mac_info.macaddr, mac_address, ETH_ALEN);
            ((struct vxge_mac_addrs *)entry)->state =
                VXGE_LL_MAC_ADDR_IN_DA_TABLE;
            /* does this mac address already exist in da table? */
            status = vxge_search_mac_addr_in_da_table(vpath,
                &mac_info);
            if (status != VXGE_HW_OK) {
                /* Add this mac address to the DA table */
                status = vxge_hw_vpath_mac_addr_add(
                    vpath->handle, mac_info.macaddr,
                    mac_info.macmask,
                    VXGE_HW_VPATH_MAC_ADDR_ADD_DUPLICATE);
                if (status != VXGE_HW_OK) {
                    vxge_debug_init(VXGE_ERR,
                        "DA add entry failed for vpath:%d",
                        vpath->device_id);
                    ((struct vxge_mac_addrs *)entry)->state
                        = VXGE_LL_MAC_ADDR_IN_LIST;
                }
            }
        }
    }

    return status;
}

/* Store all vlan ids from the list to the vid table */
static enum vxge_hw_status
vxge_restore_vpath_vid_table(struct vxge_vpath *vpath)
{
    enum vxge_hw_status status = VXGE_HW_OK;
    struct vxgedev *vdev = vpath->vdev;
    u16 vid;

    if (!vpath->is_open)
        return status;

    for_each_set_bit(vid, vdev->active_vlans, VLAN_N_VID)
        status = vxge_hw_vpath_vid_add(vpath->handle, vid);

    return status;
}

/*
 * vxge_reset_vpath
 * @vdev: pointer to vdev
 * @vp_id: vpath to reset
 *
 * Resets the vpath
*/
static int vxge_reset_vpath(struct vxgedev *vdev, int vp_id)
{
    enum vxge_hw_status status = VXGE_HW_OK;
    struct vxge_vpath *vpath = &vdev->vpaths[vp_id];
    int ret = 0;

    /* check if device is down already */
    if (unlikely(!is_vxge_card_up(vdev)))
        return 0;

    /* is device reset already scheduled */
    if (test_bit(__VXGE_STATE_RESET_CARD, &vdev->state))
        return 0;

    if (vpath->handle) {
        if (vxge_hw_vpath_reset(vpath->handle) == VXGE_HW_OK) {
            if (is_vxge_card_up(vdev) &&
                vxge_hw_vpath_recover_from_reset(vpath->handle)
                    != VXGE_HW_OK) {
                vxge_debug_init(VXGE_ERR,
                    "vxge_hw_vpath_recover_from_reset"
                    "failed for vpath:%d", vp_id);
                return status;
            }
        } else {
            vxge_debug_init(VXGE_ERR,
                "vxge_hw_vpath_reset failed for"
                "vpath:%d", vp_id);
                return status;
        }
    } else
        return VXGE_HW_FAIL;

    vxge_restore_vpath_mac_addr(vpath);
    vxge_restore_vpath_vid_table(vpath);

    /* Enable all broadcast */
    vxge_hw_vpath_bcast_enable(vpath->handle);

    /* Enable all multicast */
    if (vdev->all_multi_flg) {
        status = vxge_hw_vpath_mcast_enable(vpath->handle);
        if (status != VXGE_HW_OK)
            vxge_debug_init(VXGE_ERR,
                "%s:%d Enabling multicast failed",
                __func__, __LINE__);
    }

    /* Enable the interrupts */
    vxge_vpath_intr_enable(vdev, vp_id);

    smp_wmb();

    /* Enable the flow of traffic through the vpath */
    vxge_hw_vpath_enable(vpath->handle);

    smp_wmb();
    vxge_hw_vpath_rx_doorbell_init(vpath->handle);
    vpath->ring.last_status = VXGE_HW_OK;

    /* Vpath reset done */
    clear_bit(vp_id, &vdev->vp_reset);

    /* Start the vpath queue */
    if (netif_tx_queue_stopped(vpath->fifo.txq))
        netif_tx_wake_queue(vpath->fifo.txq);

    return ret;
}

/* Configure CI */
static void vxge_config_ci_for_tti_rti(struct vxgedev *vdev)
{
    int i = 0;

    /* Enable CI for RTI */
    if (vdev->config.intr_type == MSI_X) {
        for (i = 0; i < vdev->no_of_vpath; i++) {
            struct __vxge_hw_ring *hw_ring;

            hw_ring = vdev->vpaths[i].ring.handle;
            vxge_hw_vpath_dynamic_rti_ci_set(hw_ring);
        }
    }

    /* Enable CI for TTI */
    for (i = 0; i < vdev->no_of_vpath; i++) {
        struct __vxge_hw_fifo *hw_fifo = vdev->vpaths[i].fifo.handle;
        vxge_hw_vpath_tti_ci_set(hw_fifo);
        /*
         * For Inta (with or without napi), Set CI ON for only one
         * vpath. (Have only one free running timer).
         */
        if ((vdev->config.intr_type == INTA) && (i == 0))
            break;
    }

    return;
}

static int do_vxge_reset(struct vxgedev *vdev, int event)
{
    enum vxge_hw_status status;
    int ret = 0, vp_id, i;

    vxge_debug_entryexit(VXGE_TRACE, "%s:%d", __func__, __LINE__);

    if ((event == VXGE_LL_FULL_RESET) || (event == VXGE_LL_START_RESET)) {
        /* check if device is down already */
        if (unlikely(!is_vxge_card_up(vdev)))
            return 0;

        /* is reset already scheduled */
        if (test_and_set_bit(__VXGE_STATE_RESET_CARD, &vdev->state))
            return 0;
    }

    if (event == VXGE_LL_FULL_RESET) {
        netif_carrier_off(vdev->ndev);

        /* wait for all the vpath reset to complete */
        for (vp_id = 0; vp_id < vdev->no_of_vpath; vp_id++) {
            while (test_bit(vp_id, &vdev->vp_reset))
                msleep(50);
        }

        netif_carrier_on(vdev->ndev);

        /* if execution mode is set to debug, don't reset the adapter */
        if (unlikely(vdev->exec_mode)) {
            vxge_debug_init(VXGE_ERR,
                "%s: execution mode is debug, returning..",
                vdev->ndev->name);
            clear_bit(__VXGE_STATE_CARD_UP, &vdev->state);
            netif_tx_stop_all_queues(vdev->ndev);
            return 0;
        }
    }

    if (event == VXGE_LL_FULL_RESET) {
        vxge_hw_device_wait_receive_idle(vdev->devh);
        vxge_hw_device_intr_disable(vdev->devh);

        switch (vdev->cric_err_event) {
        case VXGE_HW_EVENT_UNKNOWN:
            netif_tx_stop_all_queues(vdev->ndev);
            vxge_debug_init(VXGE_ERR,
                "fatal: %s: Disabling device due to"
                "unknown error",
                vdev->ndev->name);
            ret = -EPERM;
            goto out;
        case VXGE_HW_EVENT_RESET_START:
            break;
        case VXGE_HW_EVENT_RESET_COMPLETE:
        case VXGE_HW_EVENT_LINK_DOWN:
        case VXGE_HW_EVENT_LINK_UP:
        case VXGE_HW_EVENT_ALARM_CLEARED:
        case VXGE_HW_EVENT_ECCERR:
        case VXGE_HW_EVENT_MRPCIM_ECCERR:
            ret = -EPERM;
            goto out;
        case VXGE_HW_EVENT_FIFO_ERR:
        case VXGE_HW_EVENT_VPATH_ERR:
            break;
        case VXGE_HW_EVENT_CRITICAL_ERR:
            netif_tx_stop_all_queues(vdev->ndev);
            vxge_debug_init(VXGE_ERR,
                "fatal: %s: Disabling device due to"
                "serious error",
                vdev->ndev->name);
            /* SOP or device reset required */
            /* This event is not currently used */
            ret = -EPERM;
            goto out;
        case VXGE_HW_EVENT_SERR:
            netif_tx_stop_all_queues(vdev->ndev);
            vxge_debug_init(VXGE_ERR,
                "fatal: %s: Disabling device due to"
                "serious error",
                vdev->ndev->name);
            ret = -EPERM;
            goto out;
        case VXGE_HW_EVENT_SRPCIM_SERR:
        case VXGE_HW_EVENT_MRPCIM_SERR:
            ret = -EPERM;
            goto out;
        case VXGE_HW_EVENT_SLOT_FREEZE:
            netif_tx_stop_all_queues(vdev->ndev);
            vxge_debug_init(VXGE_ERR,
                "fatal: %s: Disabling device due to"
                "slot freeze",
                vdev->ndev->name);
            ret = -EPERM;
            goto out;
        default:
            break;

        }
    }

    if ((event == VXGE_LL_FULL_RESET) || (event == VXGE_LL_START_RESET))
        netif_tx_stop_all_queues(vdev->ndev);

    if (event == VXGE_LL_FULL_RESET) {
        status = vxge_reset_all_vpaths(vdev);
        if (status != VXGE_HW_OK) {
            vxge_debug_init(VXGE_ERR,
                "fatal: %s: can not reset vpaths",
                vdev->ndev->name);
            ret = -EPERM;
            goto out;
        }
    }

    if (event == VXGE_LL_COMPL_RESET) {
        for (i = 0; i < vdev->no_of_vpath; i++)
            if (vdev->vpaths[i].handle) {
                if (vxge_hw_vpath_recover_from_reset(
                    vdev->vpaths[i].handle)
                        != VXGE_HW_OK) {
                    vxge_debug_init(VXGE_ERR,
                        "vxge_hw_vpath_recover_"
                        "from_reset failed for vpath: "
                        "%d", i);
                    ret = -EPERM;
                    goto out;
                }
                } else {
                    vxge_debug_init(VXGE_ERR,
                    "vxge_hw_vpath_reset failed for "
                        "vpath:%d", i);
                    ret = -EPERM;
                    goto out;
                }
    }

    if ((event == VXGE_LL_FULL_RESET) || (event == VXGE_LL_COMPL_RESET)) {
        /* Reprogram the DA table with populated mac addresses */
        for (vp_id = 0; vp_id < vdev->no_of_vpath; vp_id++) {
            vxge_restore_vpath_mac_addr(&vdev->vpaths[vp_id]);
            vxge_restore_vpath_vid_table(&vdev->vpaths[vp_id]);
        }

        /* enable vpath interrupts */
        for (i = 0; i < vdev->no_of_vpath; i++)
            vxge_vpath_intr_enable(vdev, i);

        vxge_hw_device_intr_enable(vdev->devh);

        smp_wmb();

        /* Indicate card up */
        set_bit(__VXGE_STATE_CARD_UP, &vdev->state);

        /* Get the traffic to flow through the vpaths */
        for (i = 0; i < vdev->no_of_vpath; i++) {
            vxge_hw_vpath_enable(vdev->vpaths[i].handle);
            smp_wmb();
            vxge_hw_vpath_rx_doorbell_init(vdev->vpaths[i].handle);
        }

        netif_tx_wake_all_queues(vdev->ndev);
    }

    /* configure CI */
    vxge_config_ci_for_tti_rti(vdev);

out:
    vxge_debug_entryexit(VXGE_TRACE,
        "%s:%d  Exiting...", __func__, __LINE__);

    /* Indicate reset done */
    if ((event == VXGE_LL_FULL_RESET) || (event == VXGE_LL_COMPL_RESET))
        clear_bit(__VXGE_STATE_RESET_CARD, &vdev->state);
    return ret;
}

/*
 * vxge_reset
 * @vdev: pointer to ll device
 *
 * driver may reset the chip on events of serr, eccerr, etc
 */
static void vxge_reset(struct work_struct *work)
{
    struct vxgedev *vdev = container_of(work, struct vxgedev, reset_task);

    if (!netif_running(vdev->ndev))
        return;

    do_vxge_reset(vdev, VXGE_LL_FULL_RESET);
}

static int vxge_poll_msix(struct napi_struct *napi, int budget)
{
    struct vxge_ring *ring = container_of(napi, struct vxge_ring, napi);
    int pkts_processed;
    int budget_org = budget;

    ring->budget = budget;
    ring->pkts_processed = 0;
    vxge_hw_vpath_poll_rx(ring->handle);
    pkts_processed = ring->pkts_processed;

    if (ring->pkts_processed < budget_org) {
        napi_complete(napi);

        /* Re enable the Rx interrupts for the vpath */
        vxge_hw_channel_msix_unmask(
                (struct __vxge_hw_channel *)ring->handle,
                ring->rx_vector_no);
        mmiowb();
    }

    /* We are copying and returning the local variable, in case if after
     * clearing the msix interrupt above, if the interrupt fires right
     * away which can preempt this NAPI thread */
    return pkts_processed;
}

static int vxge_poll_inta(struct napi_struct *napi, int budget)
{
    struct vxgedev *vdev = container_of(napi, struct vxgedev, napi);
    int pkts_processed = 0;
    int i;
    int budget_org = budget;
    struct vxge_ring *ring;

    struct __vxge_hw_device *hldev = pci_get_drvdata(vdev->pdev);

    for (i = 0; i < vdev->no_of_vpath; i++) {
        ring = &vdev->vpaths[i].ring;
        ring->budget = budget;
        ring->pkts_processed = 0;
        vxge_hw_vpath_poll_rx(ring->handle);
        pkts_processed += ring->pkts_processed;
        budget -= ring->pkts_processed;
        if (budget <= 0)
            break;
    }

    VXGE_COMPLETE_ALL_TX(vdev);

    if (pkts_processed < budget_org) {
        napi_complete(napi);
        /* Re enable the Rx interrupts for the ring */
        vxge_hw_device_unmask_all(hldev);
        vxge_hw_device_flush_io(hldev);
    }

    return pkts_processed;
}

#ifdef CONFIG_NET_POLL_CONTROLLER

static void vxge_netpoll(struct net_device *dev)
{
    struct vxgedev *vdev = netdev_priv(dev);
    struct pci_dev *pdev = vdev->pdev;
    struct __vxge_hw_device *hldev = pci_get_drvdata(pdev);
    const int irq = pdev->irq;

    vxge_debug_entryexit(VXGE_TRACE, "%s:%d", __func__, __LINE__);

    if (pci_channel_offline(pdev))
        return;

    disable_irq(irq);
    vxge_hw_device_clear_tx_rx(hldev);

    vxge_hw_device_clear_tx_rx(hldev);
    VXGE_COMPLETE_ALL_RX(vdev);
    VXGE_COMPLETE_ALL_TX(vdev);

    enable_irq(irq);

    vxge_debug_entryexit(VXGE_TRACE,
        "%s:%d  Exiting...", __func__, __LINE__);
}
#endif

/* RTH configuration */
static enum vxge_hw_status vxge_rth_configure(struct vxgedev *vdev)
{
    enum vxge_hw_status status = VXGE_HW_OK;
    struct vxge_hw_rth_hash_types hash_types;
    u8 itable[256] = {0}; /* indirection table */
    u8 mtable[256] = {0}; /* CPU to vpath mapping  */
    int index;

    /*
     * Filling
     *  - itable with bucket numbers
     *  - mtable with bucket-to-vpath mapping
     */
    for (index = 0; index < (1 << vdev->config.rth_bkt_sz); index++) {
        itable[index] = index;
        mtable[index] = index % vdev->no_of_vpath;
    }

    /* set indirection table, bucket-to-vpath mapping */
    status = vxge_hw_vpath_rts_rth_itable_set(vdev->vp_handles,
                        vdev->no_of_vpath,
                        mtable, itable,
                        vdev->config.rth_bkt_sz);
    if (status != VXGE_HW_OK) {
        vxge_debug_init(VXGE_ERR,
            "RTH indirection table configuration failed "
            "for vpath:%d", vdev->vpaths[0].device_id);
        return status;
    }

    /* Fill RTH hash types */
    hash_types.hash_type_tcpipv4_en   = vdev->config.rth_hash_type_tcpipv4;
    hash_types.hash_type_ipv4_en      = vdev->config.rth_hash_type_ipv4;
    hash_types.hash_type_tcpipv6_en   = vdev->config.rth_hash_type_tcpipv6;
    hash_types.hash_type_ipv6_en      = vdev->config.rth_hash_type_ipv6;
    hash_types.hash_type_tcpipv6ex_en =
                    vdev->config.rth_hash_type_tcpipv6ex;
    hash_types.hash_type_ipv6ex_en    = vdev->config.rth_hash_type_ipv6ex;

    /*
     * Because the itable_set() method uses the active_table field
     * for the target virtual path the RTH config should be updated
     * for all VPATHs. The h/w only uses the lowest numbered VPATH
     * when steering frames.
     */
     for (index = 0; index < vdev->no_of_vpath; index++) {
        status = vxge_hw_vpath_rts_rth_set(
                vdev->vpaths[index].handle,
                vdev->config.rth_algorithm,
                &hash_types,
                vdev->config.rth_bkt_sz);
         if (status != VXGE_HW_OK) {
            vxge_debug_init(VXGE_ERR,
                "RTH configuration failed for vpath:%d",
                vdev->vpaths[index].device_id);
            return status;
         }
     }

    return status;
}

/* reset vpaths */
enum vxge_hw_status vxge_reset_all_vpaths(struct vxgedev *vdev)
{
    enum vxge_hw_status status = VXGE_HW_OK;
    struct vxge_vpath *vpath;
    int i;

    for (i = 0; i < vdev->no_of_vpath; i++) {
        vpath = &vdev->vpaths[i];
        if (vpath->handle) {
            if (vxge_hw_vpath_reset(vpath->handle) == VXGE_HW_OK) {
                if (is_vxge_card_up(vdev) &&
                    vxge_hw_vpath_recover_from_reset(
                        vpath->handle) != VXGE_HW_OK) {
                    vxge_debug_init(VXGE_ERR,
                        "vxge_hw_vpath_recover_"
                        "from_reset failed for vpath: "
                        "%d", i);
                    return status;
                }
            } else {
                vxge_debug_init(VXGE_ERR,
                    "vxge_hw_vpath_reset failed for "
                    "vpath:%d", i);
                    return status;
            }
        }
    }

    return status;
}

/* close vpaths */
static void vxge_close_vpaths(struct vxgedev *vdev, int index)
{
    struct vxge_vpath *vpath;
    int i;

    for (i = index; i < vdev->no_of_vpath; i++) {
        vpath = &vdev->vpaths[i];

        if (vpath->handle && vpath->is_open) {
            vxge_hw_vpath_close(vpath->handle);
            vdev->stats.vpaths_open--;
        }
        vpath->is_open = 0;
        vpath->handle = NULL;
    }
}

/* open vpaths */
static int vxge_open_vpaths(struct vxgedev *vdev)
{
    struct vxge_hw_vpath_attr attr;
    enum vxge_hw_status status;
    struct vxge_vpath *vpath;
    u32 vp_id = 0;
    int i;

    for (i = 0; i < vdev->no_of_vpath; i++) {
        vpath = &vdev->vpaths[i];
        vxge_assert(vpath->is_configured);

        if (!vdev->titan1) {
            struct vxge_hw_vp_config *vcfg;
            vcfg = &vdev->devh->config.vp_config[vpath->device_id];

            vcfg->rti.urange_a = RTI_T1A_RX_URANGE_A;
            vcfg->rti.urange_b = RTI_T1A_RX_URANGE_B;
            vcfg->rti.urange_c = RTI_T1A_RX_URANGE_C;
            vcfg->tti.uec_a = TTI_T1A_TX_UFC_A;
            vcfg->tti.uec_b = TTI_T1A_TX_UFC_B;
            vcfg->tti.uec_c = TTI_T1A_TX_UFC_C(vdev->mtu);
            vcfg->tti.uec_d = TTI_T1A_TX_UFC_D(vdev->mtu);
            vcfg->tti.ltimer_val = VXGE_T1A_TTI_LTIMER_VAL;
            vcfg->tti.rtimer_val = VXGE_T1A_TTI_RTIMER_VAL;
        }

        attr.vp_id = vpath->device_id;
        attr.fifo_attr.callback = vxge_xmit_compl;
        attr.fifo_attr.txdl_term = vxge_tx_term;
        attr.fifo_attr.per_txdl_space = sizeof(struct vxge_tx_priv);
        attr.fifo_attr.userdata = &vpath->fifo;

        attr.ring_attr.callback = vxge_rx_1b_compl;
        attr.ring_attr.rxd_init = vxge_rx_initial_replenish;
        attr.ring_attr.rxd_term = vxge_rx_term;
        attr.ring_attr.per_rxd_space = sizeof(struct vxge_rx_priv);
        attr.ring_attr.userdata = &vpath->ring;

        vpath->ring.ndev = vdev->ndev;
        vpath->ring.pdev = vdev->pdev;

        status = vxge_hw_vpath_open(vdev->devh, &attr, &vpath->handle);
        if (status == VXGE_HW_OK) {
            vpath->fifo.handle =
                (struct __vxge_hw_fifo *)attr.fifo_attr.userdata;
            vpath->ring.handle =
                (struct __vxge_hw_ring *)attr.ring_attr.userdata;
            vpath->fifo.tx_steering_type =
                vdev->config.tx_steering_type;
            vpath->fifo.ndev = vdev->ndev;
            vpath->fifo.pdev = vdev->pdev;
            if (vdev->config.tx_steering_type)
                vpath->fifo.txq =
                    netdev_get_tx_queue(vdev->ndev, i);
            else
                vpath->fifo.txq =
                    netdev_get_tx_queue(vdev->ndev, 0);
            vpath->fifo.indicate_max_pkts =
                vdev->config.fifo_indicate_max_pkts;
            vpath->fifo.tx_vector_no = 0;
            vpath->ring.rx_vector_no = 0;
            vpath->ring.rx_hwts = vdev->rx_hwts;
            vpath->is_open = 1;
            vdev->vp_handles[i] = vpath->handle;
            vpath->ring.vlan_tag_strip = vdev->vlan_tag_strip;
            vdev->stats.vpaths_open++;
        } else {
            vdev->stats.vpath_open_fail++;
            vxge_debug_init(VXGE_ERR, "%s: vpath: %d failed to "
                    "open with status: %d",
                    vdev->ndev->name, vpath->device_id,
                    status);
            vxge_close_vpaths(vdev, 0);
            return -EPERM;
        }

        vp_id = vpath->handle->vpath->vp_id;
        vdev->vpaths_deployed |= vxge_mBIT(vp_id);
    }

    return VXGE_HW_OK;
}

static void adaptive_coalesce_tx_interrupts(struct vxge_fifo *fifo)
{
    fifo->interrupt_count++;
    if (jiffies > fifo->jiffies + HZ / 100) {
        struct __vxge_hw_fifo *hw_fifo = fifo->handle;

        fifo->jiffies = jiffies;
        if (fifo->interrupt_count > VXGE_T1A_MAX_TX_INTERRUPT_COUNT &&
            hw_fifo->rtimer != VXGE_TTI_RTIMER_ADAPT_VAL) {
            hw_fifo->rtimer = VXGE_TTI_RTIMER_ADAPT_VAL;
            vxge_hw_vpath_dynamic_tti_rtimer_set(hw_fifo);
        } else if (hw_fifo->rtimer != 0) {
            hw_fifo->rtimer = 0;
            vxge_hw_vpath_dynamic_tti_rtimer_set(hw_fifo);
        }
        fifo->interrupt_count = 0;
    }
}

static void adaptive_coalesce_rx_interrupts(struct vxge_ring *ring)
{
    ring->interrupt_count++;
    if (jiffies > ring->jiffies + HZ / 100) {
        struct __vxge_hw_ring *hw_ring = ring->handle;

        ring->jiffies = jiffies;
        if (ring->interrupt_count > VXGE_T1A_MAX_INTERRUPT_COUNT &&
            hw_ring->rtimer != VXGE_RTI_RTIMER_ADAPT_VAL) {
            hw_ring->rtimer = VXGE_RTI_RTIMER_ADAPT_VAL;
            vxge_hw_vpath_dynamic_rti_rtimer_set(hw_ring);
        } else if (hw_ring->rtimer != 0) {
            hw_ring->rtimer = 0;
            vxge_hw_vpath_dynamic_rti_rtimer_set(hw_ring);
        }
        ring->interrupt_count = 0;
    }
}

/*
 *  vxge_isr_napi
 *  @irq: the irq of the device.
 *  @dev_id: a void pointer to the hldev structure of the Titan device
 *  @ptregs: pointer to the registers pushed on the stack.
 *
 *  This function is the ISR handler of the device when napi is enabled. It
 *  identifies the reason for the interrupt and calls the relevant service
 *  routines.
 */
static irqreturn_t vxge_isr_napi(int irq, void *dev_id)
{
    struct net_device *dev;
    struct __vxge_hw_device *hldev;
    u64 reason;
    enum vxge_hw_status status;
    struct vxgedev *vdev = (struct vxgedev *)dev_id;

    vxge_debug_intr(VXGE_TRACE, "%s:%d", __func__, __LINE__);

    dev = vdev->ndev;
    hldev = pci_get_drvdata(vdev->pdev);

    if (pci_channel_offline(vdev->pdev))
        return IRQ_NONE;

    if (unlikely(!is_vxge_card_up(vdev)))
        return IRQ_HANDLED;

    status = vxge_hw_device_begin_irq(hldev, vdev->exec_mode, &reason);
    if (status == VXGE_HW_OK) {
        vxge_hw_device_mask_all(hldev);

        if (reason &
            VXGE_HW_TITAN_GENERAL_INT_STATUS_VPATH_TRAFFIC_INT(
            vdev->vpaths_deployed >>
            (64 - VXGE_HW_MAX_VIRTUAL_PATHS))) {

            vxge_hw_device_clear_tx_rx(hldev);
            napi_schedule(&vdev->napi);
            vxge_debug_intr(VXGE_TRACE,
                "%s:%d  Exiting...", __func__, __LINE__);
            return IRQ_HANDLED;
        } else
            vxge_hw_device_unmask_all(hldev);
    } else if (unlikely((status == VXGE_HW_ERR_VPATH) ||
        (status == VXGE_HW_ERR_CRITICAL) ||
        (status == VXGE_HW_ERR_FIFO))) {
        vxge_hw_device_mask_all(hldev);
        vxge_hw_device_flush_io(hldev);
        return IRQ_HANDLED;
    } else if (unlikely(status == VXGE_HW_ERR_SLOT_FREEZE))
        return IRQ_HANDLED;

    vxge_debug_intr(VXGE_TRACE, "%s:%d  Exiting...", __func__, __LINE__);
    return IRQ_NONE;
}

#ifdef CONFIG_PCI_MSI

static irqreturn_t vxge_tx_msix_handle(int irq, void *dev_id)
{
    struct vxge_fifo *fifo = (struct vxge_fifo *)dev_id;

    adaptive_coalesce_tx_interrupts(fifo);

    vxge_hw_channel_msix_mask((struct __vxge_hw_channel *)fifo->handle,
                  fifo->tx_vector_no);

    vxge_hw_channel_msix_clear((struct __vxge_hw_channel *)fifo->handle,
                   fifo->tx_vector_no);

    VXGE_COMPLETE_VPATH_TX(fifo);

    vxge_hw_channel_msix_unmask((struct __vxge_hw_channel *)fifo->handle,
                    fifo->tx_vector_no);

    mmiowb();

    return IRQ_HANDLED;
}

static irqreturn_t vxge_rx_msix_napi_handle(int irq, void *dev_id)
{
    struct vxge_ring *ring = (struct vxge_ring *)dev_id;

    adaptive_coalesce_rx_interrupts(ring);

    vxge_hw_channel_msix_mask((struct __vxge_hw_channel *)ring->handle,
                  ring->rx_vector_no);

    vxge_hw_channel_msix_clear((struct __vxge_hw_channel *)ring->handle,
                   ring->rx_vector_no);

    napi_schedule(&ring->napi);
    return IRQ_HANDLED;
}

static irqreturn_t
vxge_alarm_msix_handle(int irq, void *dev_id)
{
    int i;
    enum vxge_hw_status status;
    struct vxge_vpath *vpath = (struct vxge_vpath *)dev_id;
    struct vxgedev *vdev = vpath->vdev;
    int msix_id = (vpath->handle->vpath->vp_id *
        VXGE_HW_VPATH_MSIX_ACTIVE) + VXGE_ALARM_MSIX_ID;

    for (i = 0; i < vdev->no_of_vpath; i++) {
        /* Reduce the chance of losing alarm interrupts by masking
         * the vector. A pending bit will be set if an alarm is
         * generated and on unmask the interrupt will be fired.
         */
        vxge_hw_vpath_msix_mask(vdev->vpaths[i].handle, msix_id);
        vxge_hw_vpath_msix_clear(vdev->vpaths[i].handle, msix_id);
        mmiowb();

        status = vxge_hw_vpath_alarm_process(vdev->vpaths[i].handle,
            vdev->exec_mode);
        if (status == VXGE_HW_OK) {
            vxge_hw_vpath_msix_unmask(vdev->vpaths[i].handle,
                          msix_id);
            mmiowb();
            continue;
        }
        vxge_debug_intr(VXGE_ERR,
            "%s: vxge_hw_vpath_alarm_process failed %x ",
            VXGE_DRIVER_NAME, status);
    }
    return IRQ_HANDLED;
}

static int vxge_alloc_msix(struct vxgedev *vdev)
{
    int j, i, ret = 0;
    int msix_intr_vect = 0, temp;
    vdev->intr_cnt = 0;

start:
    /* Tx/Rx MSIX Vectors count */
    vdev->intr_cnt = vdev->no_of_vpath * 2;

    /* Alarm MSIX Vectors count */
    vdev->intr_cnt++;

    vdev->entries = kcalloc(vdev->intr_cnt, sizeof(struct msix_entry),
                GFP_KERNEL);
    if (!vdev->entries) {
        vxge_debug_init(VXGE_ERR,
            "%s: memory allocation failed",
            VXGE_DRIVER_NAME);
        ret = -ENOMEM;
        goto alloc_entries_failed;
    }

    vdev->vxge_entries = kcalloc(vdev->intr_cnt,
                     sizeof(struct vxge_msix_entry),
                     GFP_KERNEL);
    if (!vdev->vxge_entries) {
        vxge_debug_init(VXGE_ERR, "%s: memory allocation failed",
            VXGE_DRIVER_NAME);
        ret = -ENOMEM;
        goto alloc_vxge_entries_failed;
    }

    for (i = 0, j = 0; i < vdev->no_of_vpath; i++) {

        msix_intr_vect = i * VXGE_HW_VPATH_MSIX_ACTIVE;

        /* Initialize the fifo vector */
        vdev->entries[j].entry = msix_intr_vect;
        vdev->vxge_entries[j].entry = msix_intr_vect;
        vdev->vxge_entries[j].in_use = 0;
        j++;

        /* Initialize the ring vector */
        vdev->entries[j].entry = msix_intr_vect + 1;
        vdev->vxge_entries[j].entry = msix_intr_vect + 1;
        vdev->vxge_entries[j].in_use = 0;
        j++;
    }

    /* Initialize the alarm vector */
    vdev->entries[j].entry = VXGE_ALARM_MSIX_ID;
    vdev->vxge_entries[j].entry = VXGE_ALARM_MSIX_ID;
    vdev->vxge_entries[j].in_use = 0;

    ret = pci_enable_msix(vdev->pdev, vdev->entries, vdev->intr_cnt);
    if (ret > 0) {
        vxge_debug_init(VXGE_ERR,
            "%s: MSI-X enable failed for %d vectors, ret: %d",
            VXGE_DRIVER_NAME, vdev->intr_cnt, ret);
        if ((max_config_vpath != VXGE_USE_DEFAULT) || (ret < 3)) {
            ret = -ENODEV;
            goto enable_msix_failed;
        }

        kfree(vdev->entries);
        kfree(vdev->vxge_entries);
        vdev->entries = NULL;
        vdev->vxge_entries = NULL;
        /* Try with less no of vector by reducing no of vpaths count */
        temp = (ret - 1)/2;
        vxge_close_vpaths(vdev, temp);
        vdev->no_of_vpath = temp;
        goto start;
    } else if (ret < 0) {
        ret = -ENODEV;
        goto enable_msix_failed;
    }
    return 0;

enable_msix_failed:
    kfree(vdev->vxge_entries);
alloc_vxge_entries_failed:
    kfree(vdev->entries);
alloc_entries_failed:
    return ret;
}

static int vxge_enable_msix(struct vxgedev *vdev)
{

    int i, ret = 0;
    /* 0 - Tx, 1 - Rx  */
    int tim_msix_id[4] = {0, 1, 0, 0};

    vdev->intr_cnt = 0;

    /* allocate msix vectors */
    ret = vxge_alloc_msix(vdev);
    if (!ret) {
        for (i = 0; i < vdev->no_of_vpath; i++) {
            struct vxge_vpath *vpath = &vdev->vpaths[i];

            /* If fifo or ring are not enabled, the MSIX vector for
             * it should be set to 0.
             */
            vpath->ring.rx_vector_no = (vpath->device_id *
                        VXGE_HW_VPATH_MSIX_ACTIVE) + 1;

            vpath->fifo.tx_vector_no = (vpath->device_id *
                        VXGE_HW_VPATH_MSIX_ACTIVE);

            vxge_hw_vpath_msix_set(vpath->handle, tim_msix_id,
                           VXGE_ALARM_MSIX_ID);
        }
    }

    return ret;
}

static void vxge_rem_msix_isr(struct vxgedev *vdev)
{
    int intr_cnt;

    for (intr_cnt = 0; intr_cnt < (vdev->no_of_vpath * 2 + 1);
        intr_cnt++) {
        if (vdev->vxge_entries[intr_cnt].in_use) {
            synchronize_irq(vdev->entries[intr_cnt].vector);
            free_irq(vdev->entries[intr_cnt].vector,
                vdev->vxge_entries[intr_cnt].arg);
            vdev->vxge_entries[intr_cnt].in_use = 0;
        }
    }

    kfree(vdev->entries);
    kfree(vdev->vxge_entries);
    vdev->entries = NULL;
    vdev->vxge_entries = NULL;

    if (vdev->config.intr_type == MSI_X)
        pci_disable_msix(vdev->pdev);
}
#endif

static void vxge_rem_isr(struct vxgedev *vdev)
{
    struct __vxge_hw_device *hldev;
    hldev = pci_get_drvdata(vdev->pdev);

#ifdef CONFIG_PCI_MSI
    if (vdev->config.intr_type == MSI_X) {
        vxge_rem_msix_isr(vdev);
    } else
#endif
    if (vdev->config.intr_type == INTA) {
            synchronize_irq(vdev->pdev->irq);
            free_irq(vdev->pdev->irq, vdev);
    }
}

static int vxge_add_isr(struct vxgedev *vdev)
{
    int ret = 0;
#ifdef CONFIG_PCI_MSI
    int vp_idx = 0, intr_idx = 0, intr_cnt = 0, msix_idx = 0, irq_req = 0;
    int pci_fun = PCI_FUNC(vdev->pdev->devfn);

    if (vdev->config.intr_type == MSI_X)
        ret = vxge_enable_msix(vdev);

    if (ret) {
        vxge_debug_init(VXGE_ERR,
            "%s: Enabling MSI-X Failed", VXGE_DRIVER_NAME);
        vxge_debug_init(VXGE_ERR,
            "%s: Defaulting to INTA", VXGE_DRIVER_NAME);
        vdev->config.intr_type = INTA;
    }

    if (vdev->config.intr_type == MSI_X) {
        for (intr_idx = 0;
             intr_idx < (vdev->no_of_vpath *
            VXGE_HW_VPATH_MSIX_ACTIVE); intr_idx++) {

            msix_idx = intr_idx % VXGE_HW_VPATH_MSIX_ACTIVE;
            irq_req = 0;

            switch (msix_idx) {
            case 0:
                snprintf(vdev->desc[intr_cnt], VXGE_INTR_STRLEN,
                "%s:vxge:MSI-X %d - Tx - fn:%d vpath:%d",
                    vdev->ndev->name,
                    vdev->entries[intr_cnt].entry,
                    pci_fun, vp_idx);
                ret = request_irq(
                    vdev->entries[intr_cnt].vector,
                    vxge_tx_msix_handle, 0,
                    vdev->desc[intr_cnt],
                    &vdev->vpaths[vp_idx].fifo);
                    vdev->vxge_entries[intr_cnt].arg =
                        &vdev->vpaths[vp_idx].fifo;
                irq_req = 1;
                break;
            case 1:
                snprintf(vdev->desc[intr_cnt], VXGE_INTR_STRLEN,
                "%s:vxge:MSI-X %d - Rx - fn:%d vpath:%d",
                    vdev->ndev->name,
                    vdev->entries[intr_cnt].entry,
                    pci_fun, vp_idx);
                ret = request_irq(
                    vdev->entries[intr_cnt].vector,
                    vxge_rx_msix_napi_handle,
                    0,
                    vdev->desc[intr_cnt],
                    &vdev->vpaths[vp_idx].ring);
                    vdev->vxge_entries[intr_cnt].arg =
                        &vdev->vpaths[vp_idx].ring;
                irq_req = 1;
                break;
            }

            if (ret) {
                vxge_debug_init(VXGE_ERR,
                    "%s: MSIX - %d  Registration failed",
                    vdev->ndev->name, intr_cnt);
                vxge_rem_msix_isr(vdev);
                vdev->config.intr_type = INTA;
                vxge_debug_init(VXGE_ERR,
                    "%s: Defaulting to INTA"
                    , vdev->ndev->name);
                    goto INTA_MODE;
            }

            if (irq_req) {
                /* We requested for this msix interrupt */
                vdev->vxge_entries[intr_cnt].in_use = 1;
                msix_idx +=  vdev->vpaths[vp_idx].device_id *
                    VXGE_HW_VPATH_MSIX_ACTIVE;
                vxge_hw_vpath_msix_unmask(
                    vdev->vpaths[vp_idx].handle,
                    msix_idx);
                intr_cnt++;
            }

            /* Point to next vpath handler */
            if (((intr_idx + 1) % VXGE_HW_VPATH_MSIX_ACTIVE == 0) &&
                (vp_idx < (vdev->no_of_vpath - 1)))
                vp_idx++;
        }

        intr_cnt = vdev->no_of_vpath * 2;
        snprintf(vdev->desc[intr_cnt], VXGE_INTR_STRLEN,
            "%s:vxge:MSI-X %d - Alarm - fn:%d",
            vdev->ndev->name,
            vdev->entries[intr_cnt].entry,
            pci_fun);
        /* For Alarm interrupts */
        ret = request_irq(vdev->entries[intr_cnt].vector,
                    vxge_alarm_msix_handle, 0,
                    vdev->desc[intr_cnt],
                    &vdev->vpaths[0]);
        if (ret) {
            vxge_debug_init(VXGE_ERR,
                "%s: MSIX - %d Registration failed",
                vdev->ndev->name, intr_cnt);
            vxge_rem_msix_isr(vdev);
            vdev->config.intr_type = INTA;
            vxge_debug_init(VXGE_ERR,
                "%s: Defaulting to INTA",
                vdev->ndev->name);
                goto INTA_MODE;
        }

        msix_idx = (vdev->vpaths[0].handle->vpath->vp_id *
            VXGE_HW_VPATH_MSIX_ACTIVE) + VXGE_ALARM_MSIX_ID;
        vxge_hw_vpath_msix_unmask(vdev->vpaths[vp_idx].handle,
                    msix_idx);
        vdev->vxge_entries[intr_cnt].in_use = 1;
        vdev->vxge_entries[intr_cnt].arg = &vdev->vpaths[0];
    }
INTA_MODE:
#endif

    if (vdev->config.intr_type == INTA) {
        snprintf(vdev->desc[0], VXGE_INTR_STRLEN,
            "%s:vxge:INTA", vdev->ndev->name);
        vxge_hw_device_set_intr_type(vdev->devh,
            VXGE_HW_INTR_MODE_IRQLINE);

        vxge_hw_vpath_tti_ci_set(vdev->vpaths[0].fifo.handle);

        ret = request_irq((int) vdev->pdev->irq,
            vxge_isr_napi,
            IRQF_SHARED, vdev->desc[0], vdev);
        if (ret) {
            vxge_debug_init(VXGE_ERR,
                "%s %s-%d: ISR registration failed",
                VXGE_DRIVER_NAME, "IRQ", vdev->pdev->irq);
            return -ENODEV;
        }
        vxge_debug_init(VXGE_TRACE,
            "new %s-%d line allocated",
            "IRQ", vdev->pdev->irq);
    }

    return VXGE_HW_OK;
}

static void vxge_poll_vp_reset(unsigned long data)
{
    struct vxgedev *vdev = (struct vxgedev *)data;
    int i, j = 0;

    for (i = 0; i < vdev->no_of_vpath; i++) {
        if (test_bit(i, &vdev->vp_reset)) {
            vxge_reset_vpath(vdev, i);
            j++;
        }
    }
    if (j && (vdev->config.intr_type != MSI_X)) {
        vxge_hw_device_unmask_all(vdev->devh);
        vxge_hw_device_flush_io(vdev->devh);
    }

    mod_timer(&vdev->vp_reset_timer, jiffies + HZ / 2);
}

static void vxge_poll_vp_lockup(unsigned long data)
{
    struct vxgedev *vdev = (struct vxgedev *)data;
    enum vxge_hw_status status = VXGE_HW_OK;
    struct vxge_vpath *vpath;
    struct vxge_ring *ring;
    int i;
    unsigned long rx_frms;

    for (i = 0; i < vdev->no_of_vpath; i++) {
        ring = &vdev->vpaths[i].ring;

        /* Truncated to machine word size number of frames */
        rx_frms = ACCESS_ONCE(ring->stats.rx_frms);

        /* Did this vpath received any packets */
        if (ring->stats.prev_rx_frms == rx_frms) {
            status = vxge_hw_vpath_check_leak(ring->handle);

            /* Did it received any packets last time */
            if ((VXGE_HW_FAIL == status) &&
                (VXGE_HW_FAIL == ring->last_status)) {

                /* schedule vpath reset */
                if (!test_and_set_bit(i, &vdev->vp_reset)) {
                    vpath = &vdev->vpaths[i];

                    /* disable interrupts for this vpath */
                    vxge_vpath_intr_disable(vdev, i);

                    /* stop the queue for this vpath */
                    netif_tx_stop_queue(vpath->fifo.txq);
                    continue;
                }
            }
        }
        ring->stats.prev_rx_frms = rx_frms;
        ring->last_status = status;
    }

    /* Check every 1 milli second */
    mod_timer(&vdev->vp_lockup_timer, jiffies + HZ / 1000);
}

static netdev_features_t vxge_fix_features(struct net_device *dev,
    netdev_features_t features)
{
    netdev_features_t changed = dev->features ^ features;

    /* Enabling RTH requires some of the logic in vxge_device_register and a
     * vpath reset.  Due to these restrictions, only allow modification
     * while the interface is down.
     */
    if ((changed & NETIF_F_RXHASH) && netif_running(dev))
        features ^= NETIF_F_RXHASH;

    return features;
}

static int vxge_set_features(struct net_device *dev, netdev_features_t features)
{
    struct vxgedev *vdev = netdev_priv(dev);
    netdev_features_t changed = dev->features ^ features;

    if (!(changed & NETIF_F_RXHASH))
        return 0;

    /* !netif_running() ensured by vxge_fix_features() */

    vdev->devh->config.rth_en = !!(features & NETIF_F_RXHASH);
    if (vxge_reset_all_vpaths(vdev) != VXGE_HW_OK) {
        dev->features = features ^ NETIF_F_RXHASH;
        vdev->devh->config.rth_en = !!(dev->features & NETIF_F_RXHASH);
        return -EIO;
    }

    return 0;
}

static int vxge_open(struct net_device *dev)
{
    enum vxge_hw_status status;
    struct vxgedev *vdev;
    struct __vxge_hw_device *hldev;
    struct vxge_vpath *vpath;
    int ret = 0;
    int i;
    u64 val64, function_mode;

    vxge_debug_entryexit(VXGE_TRACE,
        "%s: %s:%d", dev->name, __func__, __LINE__);

    vdev = netdev_priv(dev);
    hldev = pci_get_drvdata(vdev->pdev);
    function_mode = vdev->config.device_hw_info.function_mode;

    /* make sure you have link off by default every time Nic is
     * initialized */
    netif_carrier_off(dev);

    /* Open VPATHs */
    status = vxge_open_vpaths(vdev);
    if (status != VXGE_HW_OK) {
        vxge_debug_init(VXGE_ERR,
            "%s: fatal: Vpath open failed", vdev->ndev->name);
        ret = -EPERM;
        goto out0;
    }

    vdev->mtu = dev->mtu;

    status = vxge_add_isr(vdev);
    if (status != VXGE_HW_OK) {
        vxge_debug_init(VXGE_ERR,
            "%s: fatal: ISR add failed", dev->name);
        ret = -EPERM;
        goto out1;
    }

    if (vdev->config.intr_type != MSI_X) {
        netif_napi_add(dev, &vdev->napi, vxge_poll_inta,
            vdev->config.napi_weight);
        napi_enable(&vdev->napi);
        for (i = 0; i < vdev->no_of_vpath; i++) {
            vpath = &vdev->vpaths[i];
            vpath->ring.napi_p = &vdev->napi;
        }
    } else {
        for (i = 0; i < vdev->no_of_vpath; i++) {
            vpath = &vdev->vpaths[i];
            netif_napi_add(dev, &vpath->ring.napi,
                vxge_poll_msix, vdev->config.napi_weight);
            napi_enable(&vpath->ring.napi);
            vpath->ring.napi_p = &vpath->ring.napi;
        }
    }

    /* configure RTH */
    if (vdev->config.rth_steering) {
        status = vxge_rth_configure(vdev);
        if (status != VXGE_HW_OK) {
            vxge_debug_init(VXGE_ERR,
                "%s: fatal: RTH configuration failed",
                dev->name);
            ret = -EPERM;
            goto out2;
        }
    }
    printk(KERN_INFO "%s: Receive Hashing Offload %s\n", dev->name,
           hldev->config.rth_en ? "enabled" : "disabled");

    for (i = 0; i < vdev->no_of_vpath; i++) {
        vpath = &vdev->vpaths[i];

        /* set initial mtu before enabling the device */
        status = vxge_hw_vpath_mtu_set(vpath->handle, vdev->mtu);
        if (status != VXGE_HW_OK) {
            vxge_debug_init(VXGE_ERR,
                "%s: fatal: can not set new MTU", dev->name);
            ret = -EPERM;
            goto out2;
        }
    }

    VXGE_DEVICE_DEBUG_LEVEL_SET(VXGE_TRACE, VXGE_COMPONENT_LL, vdev);
    vxge_debug_init(vdev->level_trace,
        "%s: MTU is %d", vdev->ndev->name, vdev->mtu);
    VXGE_DEVICE_DEBUG_LEVEL_SET(VXGE_ERR, VXGE_COMPONENT_LL, vdev);

    /* Restore the DA, VID table and also multicast and promiscuous mode
     * states
     */
    if (vdev->all_multi_flg) {
        for (i = 0; i < vdev->no_of_vpath; i++) {
            vpath = &vdev->vpaths[i];
            vxge_restore_vpath_mac_addr(vpath);
            vxge_restore_vpath_vid_table(vpath);

            status = vxge_hw_vpath_mcast_enable(vpath->handle);
            if (status != VXGE_HW_OK)
                vxge_debug_init(VXGE_ERR,
                    "%s:%d Enabling multicast failed",
                    __func__, __LINE__);
        }
    }

    /* Enable vpath to sniff all unicast/multicast traffic that not
     * addressed to them. We allow promiscuous mode for PF only
     */

    val64 = 0;
    for (i = 0; i < VXGE_HW_MAX_VIRTUAL_PATHS; i++)
        val64 |= VXGE_HW_RXMAC_AUTHORIZE_ALL_ADDR_VP(i);

    vxge_hw_mgmt_reg_write(vdev->devh,
        vxge_hw_mgmt_reg_type_mrpcim,
        0,
        (ulong)offsetof(struct vxge_hw_mrpcim_reg,
            rxmac_authorize_all_addr),
        val64);

    vxge_hw_mgmt_reg_write(vdev->devh,
        vxge_hw_mgmt_reg_type_mrpcim,
        0,
        (ulong)offsetof(struct vxge_hw_mrpcim_reg,
            rxmac_authorize_all_vid),
        val64);

    vxge_set_multicast(dev);

    /* Enabling Bcast and mcast for all vpath */
    for (i = 0; i < vdev->no_of_vpath; i++) {
        vpath = &vdev->vpaths[i];
        status = vxge_hw_vpath_bcast_enable(vpath->handle);
        if (status != VXGE_HW_OK)
            vxge_debug_init(VXGE_ERR,
                "%s : Can not enable bcast for vpath "
                "id %d", dev->name, i);
        if (vdev->config.addr_learn_en) {
            status = vxge_hw_vpath_mcast_enable(vpath->handle);
            if (status != VXGE_HW_OK)
                vxge_debug_init(VXGE_ERR,
                    "%s : Can not enable mcast for vpath "
                    "id %d", dev->name, i);
        }
    }

    vxge_hw_device_setpause_data(vdev->devh, 0,
        vdev->config.tx_pause_enable,
        vdev->config.rx_pause_enable);

    if (vdev->vp_reset_timer.function == NULL)
        vxge_os_timer(&vdev->vp_reset_timer, vxge_poll_vp_reset, vdev,
                  HZ / 2);

    /* There is no need to check for RxD leak and RxD lookup on Titan1A */
    if (vdev->titan1 && vdev->vp_lockup_timer.function == NULL)
        vxge_os_timer(&vdev->vp_lockup_timer, vxge_poll_vp_lockup, vdev,
                  HZ / 2);

    set_bit(__VXGE_STATE_CARD_UP, &vdev->state);

    smp_wmb();

    if (vxge_hw_device_link_state_get(vdev->devh) == VXGE_HW_LINK_UP) {
        netif_carrier_on(vdev->ndev);
        netdev_notice(vdev->ndev, "Link Up\n");
        vdev->stats.link_up++;
    }

    vxge_hw_device_intr_enable(vdev->devh);

    smp_wmb();

    for (i = 0; i < vdev->no_of_vpath; i++) {
        vpath = &vdev->vpaths[i];

        vxge_hw_vpath_enable(vpath->handle);
        smp_wmb();
        vxge_hw_vpath_rx_doorbell_init(vpath->handle);
    }

    netif_tx_start_all_queues(vdev->ndev);

    /* configure CI */
    vxge_config_ci_for_tti_rti(vdev);

    goto out0;

out2:
    vxge_rem_isr(vdev);

    /* Disable napi */
    if (vdev->config.intr_type != MSI_X)
        napi_disable(&vdev->napi);
    else {
        for (i = 0; i < vdev->no_of_vpath; i++)
            napi_disable(&vdev->vpaths[i].ring.napi);
    }

out1:
    vxge_close_vpaths(vdev, 0);
out0:
    vxge_debug_entryexit(VXGE_TRACE,
                "%s: %s:%d  Exiting...",
                dev->name, __func__, __LINE__);
    return ret;
}

/* Loop through the mac address list and delete all the entries */
static void vxge_free_mac_add_list(struct vxge_vpath *vpath)
{

    struct list_head *entry, *next;
    if (list_empty(&vpath->mac_addr_list))
        return;

    list_for_each_safe(entry, next, &vpath->mac_addr_list) {
        list_del(entry);
        kfree((struct vxge_mac_addrs *)entry);
    }
}

static void vxge_napi_del_all(struct vxgedev *vdev)
{
    int i;
    if (vdev->config.intr_type != MSI_X)
        netif_napi_del(&vdev->napi);
    else {
        for (i = 0; i < vdev->no_of_vpath; i++)
            netif_napi_del(&vdev->vpaths[i].ring.napi);
    }
}

static int do_vxge_close(struct net_device *dev, int do_io)
{
    enum vxge_hw_status status;
    struct vxgedev *vdev;
    struct __vxge_hw_device *hldev;
    int i;
    u64 val64, vpath_vector;
    vxge_debug_entryexit(VXGE_TRACE, "%s: %s:%d",
        dev->name, __func__, __LINE__);

    vdev = netdev_priv(dev);
    hldev = pci_get_drvdata(vdev->pdev);

    if (unlikely(!is_vxge_card_up(vdev)))
        return 0;

    /* If vxge_handle_crit_err task is executing,
     * wait till it completes. */
    while (test_and_set_bit(__VXGE_STATE_RESET_CARD, &vdev->state))
        msleep(50);

    if (do_io) {
        /* Put the vpath back in normal mode */
        vpath_vector = vxge_mBIT(vdev->vpaths[0].device_id);
        status = vxge_hw_mgmt_reg_read(vdev->devh,
                vxge_hw_mgmt_reg_type_mrpcim,
                0,
                (ulong)offsetof(
                    struct vxge_hw_mrpcim_reg,
                    rts_mgr_cbasin_cfg),
                &val64);
        if (status == VXGE_HW_OK) {
            val64 &= ~vpath_vector;
            status = vxge_hw_mgmt_reg_write(vdev->devh,
                    vxge_hw_mgmt_reg_type_mrpcim,
                    0,
                    (ulong)offsetof(
                        struct vxge_hw_mrpcim_reg,
                        rts_mgr_cbasin_cfg),
                    val64);
        }

        /* Remove the function 0 from promiscuous mode */
        vxge_hw_mgmt_reg_write(vdev->devh,
            vxge_hw_mgmt_reg_type_mrpcim,
            0,
            (ulong)offsetof(struct vxge_hw_mrpcim_reg,
                rxmac_authorize_all_addr),
            0);

        vxge_hw_mgmt_reg_write(vdev->devh,
            vxge_hw_mgmt_reg_type_mrpcim,
            0,
            (ulong)offsetof(struct vxge_hw_mrpcim_reg,
                rxmac_authorize_all_vid),
            0);

        smp_wmb();
    }

    if (vdev->titan1)
        del_timer_sync(&vdev->vp_lockup_timer);

    del_timer_sync(&vdev->vp_reset_timer);

    if (do_io)
        vxge_hw_device_wait_receive_idle(hldev);

    clear_bit(__VXGE_STATE_CARD_UP, &vdev->state);

    /* Disable napi */
    if (vdev->config.intr_type != MSI_X)
        napi_disable(&vdev->napi);
    else {
        for (i = 0; i < vdev->no_of_vpath; i++)
            napi_disable(&vdev->vpaths[i].ring.napi);
    }

    netif_carrier_off(vdev->ndev);
    netdev_notice(vdev->ndev, "Link Down\n");
    netif_tx_stop_all_queues(vdev->ndev);

    /* Note that at this point xmit() is stopped by upper layer */
    if (do_io)
        vxge_hw_device_intr_disable(vdev->devh);

    vxge_rem_isr(vdev);

    vxge_napi_del_all(vdev);

    if (do_io)
        vxge_reset_all_vpaths(vdev);

    vxge_close_vpaths(vdev, 0);

    vxge_debug_entryexit(VXGE_TRACE,
        "%s: %s:%d  Exiting...", dev->name, __func__, __LINE__);

    clear_bit(__VXGE_STATE_RESET_CARD, &vdev->state);

    return 0;
}

static int vxge_close(struct net_device *dev)
{
    do_vxge_close(dev, 1);
    return 0;
}

static int vxge_change_mtu(struct net_device *dev, int new_mtu)
{
    struct vxgedev *vdev = netdev_priv(dev);

    vxge_debug_entryexit(vdev->level_trace,
        "%s:%d", __func__, __LINE__);
    if ((new_mtu < VXGE_HW_MIN_MTU) || (new_mtu > VXGE_HW_MAX_MTU)) {
        vxge_debug_init(vdev->level_err,
            "%s: mtu size is invalid", dev->name);
        return -EPERM;
    }

    /* check if device is down already */
    if (unlikely(!is_vxge_card_up(vdev))) {
        /* just store new value, will use later on open() */
        dev->mtu = new_mtu;
        vxge_debug_init(vdev->level_err,
            "%s", "device is down on MTU change");
        return 0;
    }

    vxge_debug_init(vdev->level_trace,
        "trying to apply new MTU %d", new_mtu);

    if (vxge_close(dev))
        return -EIO;

    dev->mtu = new_mtu;
    vdev->mtu = new_mtu;

    if (vxge_open(dev))
        return -EIO;

    vxge_debug_init(vdev->level_trace,
        "%s: MTU changed to %d", vdev->ndev->name, new_mtu);

    vxge_debug_entryexit(vdev->level_trace,
        "%s:%d  Exiting...", __func__, __LINE__);

    return 0;
}

static struct rtnl_link_stats64 *
vxge_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *net_stats)
{
    struct vxgedev *vdev = netdev_priv(dev);
    int k;

    /* net_stats already zeroed by caller */
    for (k = 0; k < vdev->no_of_vpath; k++) {
        struct vxge_ring_stats *rxstats = &vdev->vpaths[k].ring.stats;
        struct vxge_fifo_stats *txstats = &vdev->vpaths[k].fifo.stats;
        unsigned int start;
        u64 packets, bytes, multicast;

        do {
            start = u64_stats_fetch_begin_bh(&rxstats->syncp);

            packets   = rxstats->rx_frms;
            multicast = rxstats->rx_mcast;
            bytes     = rxstats->rx_bytes;
        } while (u64_stats_fetch_retry_bh(&rxstats->syncp, start));

        net_stats->rx_packets += packets;
        net_stats->rx_bytes += bytes;
        net_stats->multicast += multicast;

        net_stats->rx_errors += rxstats->rx_errors;
        net_stats->rx_dropped += rxstats->rx_dropped;

        do {
            start = u64_stats_fetch_begin_bh(&txstats->syncp);

            packets = txstats->tx_frms;
            bytes   = txstats->tx_bytes;
        } while (u64_stats_fetch_retry_bh(&txstats->syncp, start));

        net_stats->tx_packets += packets;
        net_stats->tx_bytes += bytes;
        net_stats->tx_errors += txstats->tx_errors;
    }

    return net_stats;
}

static enum vxge_hw_status vxge_timestamp_config(struct __vxge_hw_device *devh)
{
    enum vxge_hw_status status;
    u64 val64;

    /* Timestamp is passed to the driver via the FCS, therefore we
     * must disable the FCS stripping by the adapter.  Since this is
     * required for the driver to load (due to a hardware bug),
     * there is no need to do anything special here.
     */
    val64 = VXGE_HW_XMAC_TIMESTAMP_EN |
        VXGE_HW_XMAC_TIMESTAMP_USE_LINK_ID(0) |
        VXGE_HW_XMAC_TIMESTAMP_INTERVAL(0);

    status = vxge_hw_mgmt_reg_write(devh,
                    vxge_hw_mgmt_reg_type_mrpcim,
                    0,
                    offsetof(struct vxge_hw_mrpcim_reg,
                         xmac_timestamp),
                    val64);
    vxge_hw_device_flush_io(devh);
    devh->config.hwts_en = VXGE_HW_HWTS_ENABLE;
    return status;
}

static int vxge_hwtstamp_ioctl(struct vxgedev *vdev, void __user *data)
{
    struct hwtstamp_config config;
    int i;

    if (copy_from_user(&config, data, sizeof(config)))
        return -EFAULT;

    /* reserved for future extensions */
    if (config.flags)
        return -EINVAL;

    /* Transmit HW Timestamp not supported */
    switch (config.tx_type) {
    case HWTSTAMP_TX_OFF:
        break;
    case HWTSTAMP_TX_ON:
    default:
        return -ERANGE;
    }

    switch (config.rx_filter) {
    case HWTSTAMP_FILTER_NONE:
        vdev->rx_hwts = 0;
        config.rx_filter = HWTSTAMP_FILTER_NONE;
        break;

    case HWTSTAMP_FILTER_ALL:
    case HWTSTAMP_FILTER_SOME:
    case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
    case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
    case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
    case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
    case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
    case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
    case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
    case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
    case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
    case HWTSTAMP_FILTER_PTP_V2_EVENT:
    case HWTSTAMP_FILTER_PTP_V2_SYNC:
    case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
        if (vdev->devh->config.hwts_en != VXGE_HW_HWTS_ENABLE)
            return -EFAULT;

        vdev->rx_hwts = 1;
        config.rx_filter = HWTSTAMP_FILTER_ALL;
        break;

    default:
         return -ERANGE;
    }

    for (i = 0; i < vdev->no_of_vpath; i++)
        vdev->vpaths[i].ring.rx_hwts = vdev->rx_hwts;

    if (copy_to_user(data, &config, sizeof(config)))
        return -EFAULT;

    return 0;
}

static int vxge_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
    struct vxgedev *vdev = netdev_priv(dev);
    int ret;

    switch (cmd) {
    case SIOCSHWTSTAMP:
        ret = vxge_hwtstamp_ioctl(vdev, rq->ifr_data);
        if (ret)
            return ret;
        break;
    default:
        return -EOPNOTSUPP;
    }

    return 0;
}

static void vxge_tx_watchdog(struct net_device *dev)
{
    struct vxgedev *vdev;

    vxge_debug_entryexit(VXGE_TRACE, "%s:%d", __func__, __LINE__);

    vdev = netdev_priv(dev);

    vdev->cric_err_event = VXGE_HW_EVENT_RESET_START;

    schedule_work(&vdev->reset_task);
    vxge_debug_entryexit(VXGE_TRACE,
        "%s:%d  Exiting...", __func__, __LINE__);
}

static int
vxge_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
{
    struct vxgedev *vdev = netdev_priv(dev);
    struct vxge_vpath *vpath;
    int vp_id;

    /* Add these vlan to the vid table */
    for (vp_id = 0; vp_id < vdev->no_of_vpath; vp_id++) {
        vpath = &vdev->vpaths[vp_id];
        if (!vpath->is_open)
            continue;
        vxge_hw_vpath_vid_add(vpath->handle, vid);
    }
    set_bit(vid, vdev->active_vlans);
    return 0;
}

static int
vxge_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
{
    struct vxgedev *vdev = netdev_priv(dev);
    struct vxge_vpath *vpath;
    int vp_id;

    vxge_debug_entryexit(VXGE_TRACE, "%s:%d", __func__, __LINE__);

    /* Delete this vlan from the vid table */
    for (vp_id = 0; vp_id < vdev->no_of_vpath; vp_id++) {
        vpath = &vdev->vpaths[vp_id];
        if (!vpath->is_open)
            continue;
        vxge_hw_vpath_vid_delete(vpath->handle, vid);
    }
    vxge_debug_entryexit(VXGE_TRACE,
        "%s:%d  Exiting...", __func__, __LINE__);
    clear_bit(vid, vdev->active_vlans);
    return 0;
}

static const struct net_device_ops vxge_netdev_ops = {
    .ndo_open               = vxge_open,
    .ndo_stop               = vxge_close,
    .ndo_get_stats64        = vxge_get_stats64,
    .ndo_start_xmit         = vxge_xmit,
    .ndo_validate_addr      = eth_validate_addr,
    .ndo_set_rx_mode    = vxge_set_multicast,
    .ndo_do_ioctl           = vxge_ioctl,
    .ndo_set_mac_address    = vxge_set_mac_addr,
    .ndo_change_mtu         = vxge_change_mtu,
    .ndo_fix_features   = vxge_fix_features,
    .ndo_set_features   = vxge_set_features,
    .ndo_vlan_rx_kill_vid   = vxge_vlan_rx_kill_vid,
    .ndo_vlan_rx_add_vid    = vxge_vlan_rx_add_vid,
    .ndo_tx_timeout         = vxge_tx_watchdog,
#ifdef CONFIG_NET_POLL_CONTROLLER
    .ndo_poll_controller    = vxge_netpoll,
#endif
};

static int __devinit vxge_device_register(struct __vxge_hw_device *hldev,
                      struct vxge_config *config,
                      int high_dma, int no_of_vpath,
                      struct vxgedev **vdev_out)
{
    struct net_device *ndev;
    enum vxge_hw_status status = VXGE_HW_OK;
    struct vxgedev *vdev;
    int ret = 0, no_of_queue = 1;
    u64 stat;

    *vdev_out = NULL;
    if (config->tx_steering_type)
        no_of_queue = no_of_vpath;

    ndev = alloc_etherdev_mq(sizeof(struct vxgedev),
            no_of_queue);
    if (ndev == NULL) {
        vxge_debug_init(
            vxge_hw_device_trace_level_get(hldev),
        "%s : device allocation failed", __func__);
        ret = -ENODEV;
        goto _out0;
    }

    vxge_debug_entryexit(
        vxge_hw_device_trace_level_get(hldev),
        "%s: %s:%d  Entering...",
        ndev->name, __func__, __LINE__);

    vdev = netdev_priv(ndev);
    memset(vdev, 0, sizeof(struct vxgedev));

    vdev->ndev = ndev;
    vdev->devh = hldev;
    vdev->pdev = hldev->pdev;
    memcpy(&vdev->config, config, sizeof(struct vxge_config));
    vdev->rx_hwts = 0;
    vdev->titan1 = (vdev->pdev->revision == VXGE_HW_TITAN1_PCI_REVISION);

    SET_NETDEV_DEV(ndev, &vdev->pdev->dev);

    ndev->hw_features = NETIF_F_RXCSUM | NETIF_F_SG |
        NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
        NETIF_F_TSO | NETIF_F_TSO6 |
        NETIF_F_HW_VLAN_TX;
    if (vdev->config.rth_steering != NO_STEERING)
        ndev->hw_features |= NETIF_F_RXHASH;

    ndev->features |= ndev->hw_features |
        NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER;


    ndev->netdev_ops = &vxge_netdev_ops;

    ndev->watchdog_timeo = VXGE_LL_WATCH_DOG_TIMEOUT;
    INIT_WORK(&vdev->reset_task, vxge_reset);

    vxge_initialize_ethtool_ops(ndev);

    /* Allocate memory for vpath */
    vdev->vpaths = kzalloc((sizeof(struct vxge_vpath)) *
                no_of_vpath, GFP_KERNEL);
    if (!vdev->vpaths) {
        vxge_debug_init(VXGE_ERR,
            "%s: vpath memory allocation failed",
            vdev->ndev->name);
        ret = -ENOMEM;
        goto _out1;
    }

    vxge_debug_init(vxge_hw_device_trace_level_get(hldev),
        "%s : checksuming enabled", __func__);

    if (high_dma) {
        ndev->features |= NETIF_F_HIGHDMA;
        vxge_debug_init(vxge_hw_device_trace_level_get(hldev),
            "%s : using High DMA", __func__);
    }

    ret = register_netdev(ndev);
    if (ret) {
        vxge_debug_init(vxge_hw_device_trace_level_get(hldev),
            "%s: %s : device registration failed!",
            ndev->name, __func__);
        goto _out2;
    }

    /*  Set the factory defined MAC address initially */
    ndev->addr_len = ETH_ALEN;

    /* Make Link state as off at this point, when the Link change
     * interrupt comes the state will be automatically changed to
     * the right state.
     */
    netif_carrier_off(ndev);

    vxge_debug_init(vxge_hw_device_trace_level_get(hldev),
        "%s: Ethernet device registered",
        ndev->name);

    hldev->ndev = ndev;
    *vdev_out = vdev;

    /* Resetting the Device stats */
    status = vxge_hw_mrpcim_stats_access(
                hldev,
                VXGE_HW_STATS_OP_CLEAR_ALL_STATS,
                0,
                0,
                &stat);

    if (status == VXGE_HW_ERR_PRIVILAGED_OPEARATION)
        vxge_debug_init(
            vxge_hw_device_trace_level_get(hldev),
            "%s: device stats clear returns"
            "VXGE_HW_ERR_PRIVILAGED_OPEARATION", ndev->name);

    vxge_debug_entryexit(vxge_hw_device_trace_level_get(hldev),
        "%s: %s:%d  Exiting...",
        ndev->name, __func__, __LINE__);

    return ret;
_out2:
    kfree(vdev->vpaths);
_out1:
    free_netdev(ndev);
_out0:
    return ret;
}

/*
 * vxge_device_unregister
 *
 * This function will unregister and free network device
 */
static void vxge_device_unregister(struct __vxge_hw_device *hldev)
{
    struct vxgedev *vdev;
    struct net_device *dev;
    char buf[IFNAMSIZ];

    dev = hldev->ndev;
    vdev = netdev_priv(dev);

    vxge_debug_entryexit(vdev->level_trace, "%s: %s:%d", vdev->ndev->name,
                 __func__, __LINE__);

    strncpy(buf, dev->name, IFNAMSIZ);

    flush_work(&vdev->reset_task);

    /* in 2.6 will call stop() if device is up */
    unregister_netdev(dev);

    kfree(vdev->vpaths);

    /* we are safe to free it now */
    free_netdev(dev);

    vxge_debug_init(vdev->level_trace, "%s: ethernet device unregistered",
            buf);
    vxge_debug_entryexit(vdev->level_trace, "%s: %s:%d  Exiting...", buf,
                 __func__, __LINE__);
}

/*
 * vxge_callback_crit_err
 *
 * This function is called by the alarm handler in interrupt context.
 * Driver must analyze it based on the event type.
 */
static void
vxge_callback_crit_err(struct __vxge_hw_device *hldev,
            enum vxge_hw_event type, u64 vp_id)
{
    struct net_device *dev = hldev->ndev;
    struct vxgedev *vdev = netdev_priv(dev);
    struct vxge_vpath *vpath = NULL;
    int vpath_idx;

    vxge_debug_entryexit(vdev->level_trace,
        "%s: %s:%d", vdev->ndev->name, __func__, __LINE__);

    /* Note: This event type should be used for device wide
     * indications only - Serious errors, Slot freeze and critical errors
     */
    vdev->cric_err_event = type;

    for (vpath_idx = 0; vpath_idx < vdev->no_of_vpath; vpath_idx++) {
        vpath = &vdev->vpaths[vpath_idx];
        if (vpath->device_id == vp_id)
            break;
    }

    if (!test_bit(__VXGE_STATE_RESET_CARD, &vdev->state)) {
        if (type == VXGE_HW_EVENT_SLOT_FREEZE) {
            vxge_debug_init(VXGE_ERR,
                "%s: Slot is frozen", vdev->ndev->name);
        } else if (type == VXGE_HW_EVENT_SERR) {
            vxge_debug_init(VXGE_ERR,
                "%s: Encountered Serious Error",
                vdev->ndev->name);
        } else if (type == VXGE_HW_EVENT_CRITICAL_ERR)
            vxge_debug_init(VXGE_ERR,
                "%s: Encountered Critical Error",
                vdev->ndev->name);
    }

    if ((type == VXGE_HW_EVENT_SERR) ||
        (type == VXGE_HW_EVENT_SLOT_FREEZE)) {
        if (unlikely(vdev->exec_mode))
            clear_bit(__VXGE_STATE_CARD_UP, &vdev->state);
    } else if (type == VXGE_HW_EVENT_CRITICAL_ERR) {
        vxge_hw_device_mask_all(hldev);
        if (unlikely(vdev->exec_mode))
            clear_bit(__VXGE_STATE_CARD_UP, &vdev->state);
    } else if ((type == VXGE_HW_EVENT_FIFO_ERR) ||
          (type == VXGE_HW_EVENT_VPATH_ERR)) {

        if (unlikely(vdev->exec_mode))
            clear_bit(__VXGE_STATE_CARD_UP, &vdev->state);
        else {
            /* check if this vpath is already set for reset */
            if (!test_and_set_bit(vpath_idx, &vdev->vp_reset)) {

                /* disable interrupts for this vpath */
                vxge_vpath_intr_disable(vdev, vpath_idx);

                /* stop the queue for this vpath */
                netif_tx_stop_queue(vpath->fifo.txq);
            }
        }
    }

    vxge_debug_entryexit(vdev->level_trace,
        "%s: %s:%d  Exiting...",
        vdev->ndev->name, __func__, __LINE__);
}

static void verify_bandwidth(void)
{
    int i, band_width, total = 0, equal_priority = 0;

    /* 1. If user enters 0 for some fifo, give equal priority to all */
    for (i = 0; i < VXGE_HW_MAX_VIRTUAL_PATHS; i++) {
        if (bw_percentage[i] == 0) {
            equal_priority = 1;
            break;
        }
    }

    if (!equal_priority) {
        /* 2. If sum exceeds 100, give equal priority to all */
        for (i = 0; i < VXGE_HW_MAX_VIRTUAL_PATHS; i++) {
            if (bw_percentage[i] == 0xFF)
                break;

            total += bw_percentage[i];
            if (total > VXGE_HW_VPATH_BANDWIDTH_MAX) {
                equal_priority = 1;
                break;
            }
        }
    }

    if (!equal_priority) {
        /* Is all the bandwidth consumed? */
        if (total < VXGE_HW_VPATH_BANDWIDTH_MAX) {
            if (i < VXGE_HW_MAX_VIRTUAL_PATHS) {
                /* Split rest of bw equally among next VPs*/
                band_width =
                  (VXGE_HW_VPATH_BANDWIDTH_MAX  - total) /
                    (VXGE_HW_MAX_VIRTUAL_PATHS - i);
                if (band_width < 2) /* min of 2% */
                    equal_priority = 1;
                else {
                    for (; i < VXGE_HW_MAX_VIRTUAL_PATHS;
                        i++)
                        bw_percentage[i] =
                            band_width;
                }
            }
        } else if (i < VXGE_HW_MAX_VIRTUAL_PATHS)
            equal_priority = 1;
    }

    if (equal_priority) {
        vxge_debug_init(VXGE_ERR,
            "%s: Assigning equal bandwidth to all the vpaths",
            VXGE_DRIVER_NAME);
        bw_percentage[0] = VXGE_HW_VPATH_BANDWIDTH_MAX /
                    VXGE_HW_MAX_VIRTUAL_PATHS;
        for (i = 1; i < VXGE_HW_MAX_VIRTUAL_PATHS; i++)
            bw_percentage[i] = bw_percentage[0];
    }
}

/*
 * Vpath configuration
 */
static int __devinit vxge_config_vpaths(
            struct vxge_hw_device_config *device_config,
            u64 vpath_mask, struct vxge_config *config_param)
{
    int i, no_of_vpaths = 0, default_no_vpath = 0, temp;
    u32 txdl_size, txdl_per_memblock;

    temp = driver_config->vpath_per_dev;
    if ((driver_config->vpath_per_dev == VXGE_USE_DEFAULT) &&
        (max_config_dev == VXGE_MAX_CONFIG_DEV)) {
        /* No more CPU. Return vpath number as zero.*/
        if (driver_config->g_no_cpus == -1)
            return 0;

        if (!driver_config->g_no_cpus)
            driver_config->g_no_cpus =
                netif_get_num_default_rss_queues();

        driver_config->vpath_per_dev = driver_config->g_no_cpus >> 1;
        if (!driver_config->vpath_per_dev)
            driver_config->vpath_per_dev = 1;

        for (i = 0; i < VXGE_HW_MAX_VIRTUAL_PATHS; i++)
            if (!vxge_bVALn(vpath_mask, i, 1))
                continue;
            else
                default_no_vpath++;
        if (default_no_vpath < driver_config->vpath_per_dev)
            driver_config->vpath_per_dev = default_no_vpath;

        driver_config->g_no_cpus = driver_config->g_no_cpus -
                (driver_config->vpath_per_dev * 2);
        if (driver_config->g_no_cpus <= 0)
            driver_config->g_no_cpus = -1;
    }

    if (driver_config->vpath_per_dev == 1) {
        vxge_debug_ll_config(VXGE_TRACE,
            "%s: Disable tx and rx steering, "
            "as single vpath is configured", VXGE_DRIVER_NAME);
        config_param->rth_steering = NO_STEERING;
        config_param->tx_steering_type = NO_STEERING;
        device_config->rth_en = 0;
    }

    /* configure bandwidth */
    for (i = 0; i < VXGE_HW_MAX_VIRTUAL_PATHS; i++)
        device_config->vp_config[i].min_bandwidth = bw_percentage[i];

    for (i = 0; i < VXGE_HW_MAX_VIRTUAL_PATHS; i++) {
        device_config->vp_config[i].vp_id = i;
        device_config->vp_config[i].mtu = VXGE_HW_DEFAULT_MTU;
        if (no_of_vpaths < driver_config->vpath_per_dev) {
            if (!vxge_bVALn(vpath_mask, i, 1)) {
                vxge_debug_ll_config(VXGE_TRACE,
                    "%s: vpath: %d is not available",
                    VXGE_DRIVER_NAME, i);
                continue;
            } else {
                vxge_debug_ll_config(VXGE_TRACE,
                    "%s: vpath: %d available",
                    VXGE_DRIVER_NAME, i);
                no_of_vpaths++;
            }
        } else {
            vxge_debug_ll_config(VXGE_TRACE,
                "%s: vpath: %d is not configured, "
                "max_config_vpath exceeded",
                VXGE_DRIVER_NAME, i);
            break;
        }

        /* Configure Tx fifo's */
        device_config->vp_config[i].fifo.enable =
                        VXGE_HW_FIFO_ENABLE;
        device_config->vp_config[i].fifo.max_frags =
                MAX_SKB_FRAGS + 1;
        device_config->vp_config[i].fifo.memblock_size =
            VXGE_HW_MIN_FIFO_MEMBLOCK_SIZE;

        txdl_size = device_config->vp_config[i].fifo.max_frags *
                sizeof(struct vxge_hw_fifo_txd);
        txdl_per_memblock = VXGE_HW_MIN_FIFO_MEMBLOCK_SIZE / txdl_size;

        device_config->vp_config[i].fifo.fifo_blocks =
            ((VXGE_DEF_FIFO_LENGTH - 1) / txdl_per_memblock) + 1;

        device_config->vp_config[i].fifo.intr =
                VXGE_HW_FIFO_QUEUE_INTR_DISABLE;

        /* Configure tti properties */
        device_config->vp_config[i].tti.intr_enable =
                    VXGE_HW_TIM_INTR_ENABLE;

        device_config->vp_config[i].tti.btimer_val =
            (VXGE_TTI_BTIMER_VAL * 1000) / 272;

        device_config->vp_config[i].tti.timer_ac_en =
                VXGE_HW_TIM_TIMER_AC_ENABLE;

        /* For msi-x with napi (each vector has a handler of its own) -
         * Set CI to OFF for all vpaths
         */
        device_config->vp_config[i].tti.timer_ci_en =
            VXGE_HW_TIM_TIMER_CI_DISABLE;

        device_config->vp_config[i].tti.timer_ri_en =
                VXGE_HW_TIM_TIMER_RI_DISABLE;

        device_config->vp_config[i].tti.util_sel =
            VXGE_HW_TIM_UTIL_SEL_LEGACY_TX_NET_UTIL;

        device_config->vp_config[i].tti.ltimer_val =
            (VXGE_TTI_LTIMER_VAL * 1000) / 272;

        device_config->vp_config[i].tti.rtimer_val =
            (VXGE_TTI_RTIMER_VAL * 1000) / 272;

        device_config->vp_config[i].tti.urange_a = TTI_TX_URANGE_A;
        device_config->vp_config[i].tti.urange_b = TTI_TX_URANGE_B;
        device_config->vp_config[i].tti.urange_c = TTI_TX_URANGE_C;
        device_config->vp_config[i].tti.uec_a = TTI_TX_UFC_A;
        device_config->vp_config[i].tti.uec_b = TTI_TX_UFC_B;
        device_config->vp_config[i].tti.uec_c = TTI_TX_UFC_C;
        device_config->vp_config[i].tti.uec_d = TTI_TX_UFC_D;

        /* Configure Rx rings */
        device_config->vp_config[i].ring.enable  =
                        VXGE_HW_RING_ENABLE;

        device_config->vp_config[i].ring.ring_blocks  =
                        VXGE_HW_DEF_RING_BLOCKS;

        device_config->vp_config[i].ring.buffer_mode =
            VXGE_HW_RING_RXD_BUFFER_MODE_1;

        device_config->vp_config[i].ring.rxds_limit  =
                VXGE_HW_DEF_RING_RXDS_LIMIT;

        device_config->vp_config[i].ring.scatter_mode =
                    VXGE_HW_RING_SCATTER_MODE_A;

        /* Configure rti properties */
        device_config->vp_config[i].rti.intr_enable =
                    VXGE_HW_TIM_INTR_ENABLE;

        device_config->vp_config[i].rti.btimer_val =
            (VXGE_RTI_BTIMER_VAL * 1000)/272;

        device_config->vp_config[i].rti.timer_ac_en =
                        VXGE_HW_TIM_TIMER_AC_ENABLE;

        device_config->vp_config[i].rti.timer_ci_en =
                        VXGE_HW_TIM_TIMER_CI_DISABLE;

        device_config->vp_config[i].rti.timer_ri_en =
                        VXGE_HW_TIM_TIMER_RI_DISABLE;

        device_config->vp_config[i].rti.util_sel =
                VXGE_HW_TIM_UTIL_SEL_LEGACY_RX_NET_UTIL;

        device_config->vp_config[i].rti.urange_a =
                        RTI_RX_URANGE_A;
        device_config->vp_config[i].rti.urange_b =
                        RTI_RX_URANGE_B;
        device_config->vp_config[i].rti.urange_c =
                        RTI_RX_URANGE_C;
        device_config->vp_config[i].rti.uec_a = RTI_RX_UFC_A;
        device_config->vp_config[i].rti.uec_b = RTI_RX_UFC_B;
        device_config->vp_config[i].rti.uec_c = RTI_RX_UFC_C;
        device_config->vp_config[i].rti.uec_d = RTI_RX_UFC_D;

        device_config->vp_config[i].rti.rtimer_val =
            (VXGE_RTI_RTIMER_VAL * 1000) / 272;

        device_config->vp_config[i].rti.ltimer_val =
            (VXGE_RTI_LTIMER_VAL * 1000) / 272;

        device_config->vp_config[i].rpa_strip_vlan_tag =
            vlan_tag_strip;
    }

    driver_config->vpath_per_dev = temp;
    return no_of_vpaths;
}

/* initialize device configuratrions */
static void __devinit vxge_device_config_init(
                struct vxge_hw_device_config *device_config,
                int *intr_type)
{
    /* Used for CQRQ/SRQ. */
    device_config->dma_blockpool_initial =
            VXGE_HW_INITIAL_DMA_BLOCK_POOL_SIZE;

    device_config->dma_blockpool_max =
            VXGE_HW_MAX_DMA_BLOCK_POOL_SIZE;

    if (max_mac_vpath > VXGE_MAX_MAC_ADDR_COUNT)
        max_mac_vpath = VXGE_MAX_MAC_ADDR_COUNT;

#ifndef CONFIG_PCI_MSI
    vxge_debug_init(VXGE_ERR,
        "%s: This Kernel does not support "
        "MSI-X. Defaulting to INTA", VXGE_DRIVER_NAME);
    *intr_type = INTA;
#endif

    /* Configure whether MSI-X or IRQL. */
    switch (*intr_type) {
    case INTA:
        device_config->intr_mode = VXGE_HW_INTR_MODE_IRQLINE;
        break;

    case MSI_X:
        device_config->intr_mode = VXGE_HW_INTR_MODE_MSIX_ONE_SHOT;
        break;
    }

    /* Timer period between device poll */
    device_config->device_poll_millis = VXGE_TIMER_DELAY;

    /* Configure mac based steering. */
    device_config->rts_mac_en = addr_learn_en;

    /* Configure Vpaths */
    device_config->rth_it_type = VXGE_HW_RTH_IT_TYPE_MULTI_IT;

    vxge_debug_ll_config(VXGE_TRACE, "%s : Device Config Params ",
            __func__);
    vxge_debug_ll_config(VXGE_TRACE, "intr_mode : %d",
            device_config->intr_mode);
    vxge_debug_ll_config(VXGE_TRACE, "device_poll_millis : %d",
            device_config->device_poll_millis);
    vxge_debug_ll_config(VXGE_TRACE, "rth_en : %d",
            device_config->rth_en);
    vxge_debug_ll_config(VXGE_TRACE, "rth_it_type : %d",
            device_config->rth_it_type);
}

static void __devinit vxge_print_parm(struct vxgedev *vdev, u64 vpath_mask)
{
    int i;

    vxge_debug_init(VXGE_TRACE,
        "%s: %d Vpath(s) opened",
        vdev->ndev->name, vdev->no_of_vpath);

    switch (vdev->config.intr_type) {
    case INTA:
        vxge_debug_init(VXGE_TRACE,
            "%s: Interrupt type INTA", vdev->ndev->name);
        break;

    case MSI_X:
        vxge_debug_init(VXGE_TRACE,
            "%s: Interrupt type MSI-X", vdev->ndev->name);
        break;
    }

    if (vdev->config.rth_steering) {
        vxge_debug_init(VXGE_TRACE,
            "%s: RTH steering enabled for TCP_IPV4",
            vdev->ndev->name);
    } else {
        vxge_debug_init(VXGE_TRACE,
            "%s: RTH steering disabled", vdev->ndev->name);
    }

    switch (vdev->config.tx_steering_type) {
    case NO_STEERING:
        vxge_debug_init(VXGE_TRACE,
            "%s: Tx steering disabled", vdev->ndev->name);
        break;
    case TX_PRIORITY_STEERING:
        vxge_debug_init(VXGE_TRACE,
            "%s: Unsupported tx steering option",
            vdev->ndev->name);
        vxge_debug_init(VXGE_TRACE,
            "%s: Tx steering disabled", vdev->ndev->name);
        vdev->config.tx_steering_type = 0;
        break;
    case TX_VLAN_STEERING:
        vxge_debug_init(VXGE_TRACE,
            "%s: Unsupported tx steering option",
            vdev->ndev->name);
        vxge_debug_init(VXGE_TRACE,
            "%s: Tx steering disabled", vdev->ndev->name);
        vdev->config.tx_steering_type = 0;
        break;
    case TX_MULTIQ_STEERING:
        vxge_debug_init(VXGE_TRACE,
            "%s: Tx multiqueue steering enabled",
            vdev->ndev->name);
        break;
    case TX_PORT_STEERING:
        vxge_debug_init(VXGE_TRACE,
            "%s: Tx port steering enabled",
            vdev->ndev->name);
        break;
    default:
        vxge_debug_init(VXGE_ERR,
            "%s: Unsupported tx steering type",
            vdev->ndev->name);
        vxge_debug_init(VXGE_TRACE,
            "%s: Tx steering disabled", vdev->ndev->name);
        vdev->config.tx_steering_type = 0;
    }

    if (vdev->config.addr_learn_en)
        vxge_debug_init(VXGE_TRACE,
            "%s: MAC Address learning enabled", vdev->ndev->name);

    for (i = 0; i < VXGE_HW_MAX_VIRTUAL_PATHS; i++) {
        if (!vxge_bVALn(vpath_mask, i, 1))
            continue;
        vxge_debug_ll_config(VXGE_TRACE,
            "%s: MTU size - %d", vdev->ndev->name,
            ((vdev->devh))->
                config.vp_config[i].mtu);
        vxge_debug_init(VXGE_TRACE,
            "%s: VLAN tag stripping %s", vdev->ndev->name,
            ((vdev->devh))->
                config.vp_config[i].rpa_strip_vlan_tag
            ? "Enabled" : "Disabled");
        vxge_debug_ll_config(VXGE_TRACE,
            "%s: Max frags : %d", vdev->ndev->name,
            ((vdev->devh))->
                config.vp_config[i].fifo.max_frags);
        break;
    }
}

#ifdef CONFIG_PM

static int vxge_pm_suspend(struct pci_dev *pdev, pm_message_t state)
{
    return -ENOSYS;
}
static int vxge_pm_resume(struct pci_dev *pdev)
{
    return -ENOSYS;
}

#endif

static pci_ers_result_t vxge_io_error_detected(struct pci_dev *pdev,
                        pci_channel_state_t state)
{
    struct __vxge_hw_device *hldev = pci_get_drvdata(pdev);
    struct net_device *netdev = hldev->ndev;

    netif_device_detach(netdev);

    if (state == pci_channel_io_perm_failure)
        return PCI_ERS_RESULT_DISCONNECT;

    if (netif_running(netdev)) {
        /* Bring down the card, while avoiding PCI I/O */
        do_vxge_close(netdev, 0);
    }

    pci_disable_device(pdev);

    return PCI_ERS_RESULT_NEED_RESET;
}

static pci_ers_result_t vxge_io_slot_reset(struct pci_dev *pdev)
{
    struct __vxge_hw_device *hldev = pci_get_drvdata(pdev);
    struct net_device *netdev = hldev->ndev;

    struct vxgedev *vdev = netdev_priv(netdev);

    if (pci_enable_device(pdev)) {
        netdev_err(netdev, "Cannot re-enable device after reset\n");
        return PCI_ERS_RESULT_DISCONNECT;
    }

    pci_set_master(pdev);
    do_vxge_reset(vdev, VXGE_LL_FULL_RESET);

    return PCI_ERS_RESULT_RECOVERED;
}

static void vxge_io_resume(struct pci_dev *pdev)
{
    struct __vxge_hw_device *hldev = pci_get_drvdata(pdev);
    struct net_device *netdev = hldev->ndev;

    if (netif_running(netdev)) {
        if (vxge_open(netdev)) {
            netdev_err(netdev,
                   "Can't bring device back up after reset\n");
            return;
        }
    }

    netif_device_attach(netdev);
}

static inline u32 vxge_get_num_vfs(u64 function_mode)
{
    u32 num_functions = 0;

    switch (function_mode) {
    case VXGE_HW_FUNCTION_MODE_MULTI_FUNCTION:
    case VXGE_HW_FUNCTION_MODE_SRIOV_8:
        num_functions = 8;
        break;
    case VXGE_HW_FUNCTION_MODE_SINGLE_FUNCTION:
        num_functions = 1;
        break;
    case VXGE_HW_FUNCTION_MODE_SRIOV:
    case VXGE_HW_FUNCTION_MODE_MRIOV:
    case VXGE_HW_FUNCTION_MODE_MULTI_FUNCTION_17:
        num_functions = 17;
        break;
    case VXGE_HW_FUNCTION_MODE_SRIOV_4:
        num_functions = 4;
        break;
    case VXGE_HW_FUNCTION_MODE_MULTI_FUNCTION_2:
        num_functions = 2;
        break;
    case VXGE_HW_FUNCTION_MODE_MRIOV_8:
        num_functions = 8; /* TODO */
        break;
    }
    return num_functions;
}

int vxge_fw_upgrade(struct vxgedev *vdev, char *fw_name, int override)
{
    struct __vxge_hw_device *hldev = vdev->devh;
    u32 maj, min, bld, cmaj, cmin, cbld;
    enum vxge_hw_status status;
    const struct firmware *fw;
    int ret;

    ret = request_firmware(&fw, fw_name, &vdev->pdev->dev);
    if (ret) {
        vxge_debug_init(VXGE_ERR, "%s: Firmware file '%s' not found",
                VXGE_DRIVER_NAME, fw_name);
        goto out;
    }

    /* Load the new firmware onto the adapter */
    status = vxge_update_fw_image(hldev, fw->data, fw->size);
    if (status != VXGE_HW_OK) {
        vxge_debug_init(VXGE_ERR,
                "%s: FW image download to adapter failed '%s'.",
                VXGE_DRIVER_NAME, fw_name);
        ret = -EIO;
        goto out;
    }

    /* Read the version of the new firmware */
    status = vxge_hw_upgrade_read_version(hldev, &maj, &min, &bld);
    if (status != VXGE_HW_OK) {
        vxge_debug_init(VXGE_ERR,
                "%s: Upgrade read version failed '%s'.",
                VXGE_DRIVER_NAME, fw_name);
        ret = -EIO;
        goto out;
    }

    cmaj = vdev->config.device_hw_info.fw_version.major;
    cmin = vdev->config.device_hw_info.fw_version.minor;
    cbld = vdev->config.device_hw_info.fw_version.build;
    /* It's possible the version in /lib/firmware is not the latest version.
     * If so, we could get into a loop of trying to upgrade to the latest
     * and flashing the older version.
     */
    if (VXGE_FW_VER(maj, min, bld) == VXGE_FW_VER(cmaj, cmin, cbld) &&
        !override) {
        ret = -EINVAL;
        goto out;
    }

    printk(KERN_NOTICE "Upgrade to firmware version %d.%d.%d commencing\n",
           maj, min, bld);

    /* Flash the adapter with the new firmware */
    status = vxge_hw_flash_fw(hldev);
    if (status != VXGE_HW_OK) {
        vxge_debug_init(VXGE_ERR, "%s: Upgrade commit failed '%s'.",
                VXGE_DRIVER_NAME, fw_name);
        ret = -EIO;
        goto out;
    }

    printk(KERN_NOTICE "Upgrade of firmware successful!  Adapter must be "
           "hard reset before using, thus requiring a system reboot or a "
           "hotplug event.\n");

out:
    release_firmware(fw);
    return ret;
}

static int vxge_probe_fw_update(struct vxgedev *vdev)
{
    u32 maj, min, bld;
    int ret, gpxe = 0;
    char *fw_name;

    maj = vdev->config.device_hw_info.fw_version.major;
    min = vdev->config.device_hw_info.fw_version.minor;
    bld = vdev->config.device_hw_info.fw_version.build;

    if (VXGE_FW_VER(maj, min, bld) == VXGE_CERT_FW_VER)
        return 0;

    /* Ignore the build number when determining if the current firmware is
     * "too new" to load the driver
     */
    if (VXGE_FW_VER(maj, min, 0) > VXGE_CERT_FW_VER) {
        vxge_debug_init(VXGE_ERR, "%s: Firmware newer than last known "
                "version, unable to load driver\n",
                VXGE_DRIVER_NAME);
        return -EINVAL;
    }

    /* Firmware 1.4.4 and older cannot be upgraded, and is too ancient to
     * work with this driver.
     */
    if (VXGE_FW_VER(maj, min, bld) <= VXGE_FW_DEAD_VER) {
        vxge_debug_init(VXGE_ERR, "%s: Firmware %d.%d.%d cannot be "
                "upgraded\n", VXGE_DRIVER_NAME, maj, min, bld);
        return -EINVAL;
    }

    /* If file not specified, determine gPXE or not */
    if (VXGE_FW_VER(maj, min, bld) >= VXGE_EPROM_FW_VER) {
        int i;
        for (i = 0; i < VXGE_HW_MAX_ROM_IMAGES; i++)
            if (vdev->devh->eprom_versions[i]) {
                gpxe = 1;
                break;
            }
    }
    if (gpxe)
        fw_name = "vxge/X3fw-pxe.ncf";
    else
        fw_name = "vxge/X3fw.ncf";

    ret = vxge_fw_upgrade(vdev, fw_name, 0);
    /* -EINVAL and -ENOENT are not fatal errors for flashing firmware on
     * probe, so ignore them
     */
    if (ret != -EINVAL && ret != -ENOENT)
        return -EIO;
    else
        ret = 0;

    if (VXGE_FW_VER(VXGE_CERT_FW_VER_MAJOR, VXGE_CERT_FW_VER_MINOR, 0) >
        VXGE_FW_VER(maj, min, 0)) {
        vxge_debug_init(VXGE_ERR, "%s: Firmware %d.%d.%d is too old to"
                " be used with this driver.",
                VXGE_DRIVER_NAME, maj, min, bld);
        return -EINVAL;
    }

    return ret;
}

static int __devinit is_sriov_initialized(struct pci_dev *pdev)
{
    int pos;
    u16 ctrl;

    pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV);
    if (pos) {
        pci_read_config_word(pdev, pos + PCI_SRIOV_CTRL, &ctrl);
        if (ctrl & PCI_SRIOV_CTRL_VFE)
            return 1;
    }
    return 0;
}

static const struct vxge_hw_uld_cbs vxge_callbacks = {
    .link_up = vxge_callback_link_up,
    .link_down = vxge_callback_link_down,
    .crit_err = vxge_callback_crit_err,
};

static int __devinit
vxge_probe(struct pci_dev *pdev, const struct pci_device_id *pre)
{
    struct __vxge_hw_device *hldev;
    enum vxge_hw_status status;
    int ret;
    int high_dma = 0;
    u64 vpath_mask = 0;
    struct vxgedev *vdev;
    struct vxge_config *ll_config = NULL;
    struct vxge_hw_device_config *device_config = NULL;
    struct vxge_hw_device_attr attr;
    int i, j, no_of_vpath = 0, max_vpath_supported = 0;
    u8 *macaddr;
    struct vxge_mac_addrs *entry;
    static int bus = -1, device = -1;
    u32 host_type;
    u8 new_device = 0;
    enum vxge_hw_status is_privileged;
    u32 function_mode;
    u32 num_vfs = 0;

    vxge_debug_entryexit(VXGE_TRACE, "%s:%d", __func__, __LINE__);
    attr.pdev = pdev;

    /* In SRIOV-17 mode, functions of the same adapter
     * can be deployed on different buses
     */
    if (((bus != pdev->bus->number) || (device != PCI_SLOT(pdev->devfn))) &&
        !pdev->is_virtfn)
        new_device = 1;

    bus = pdev->bus->number;
    device = PCI_SLOT(pdev->devfn);

    if (new_device) {
        if (driver_config->config_dev_cnt &&
           (driver_config->config_dev_cnt !=
            driver_config->total_dev_cnt))
            vxge_debug_init(VXGE_ERR,
                "%s: Configured %d of %d devices",
                VXGE_DRIVER_NAME,
                driver_config->config_dev_cnt,
                driver_config->total_dev_cnt);
        driver_config->config_dev_cnt = 0;
        driver_config->total_dev_cnt = 0;
    }

    /* Now making the CPU based no of vpath calculation
     * applicable for individual functions as well.
     */
    driver_config->g_no_cpus = 0;
    driver_config->vpath_per_dev = max_config_vpath;

    driver_config->total_dev_cnt++;
    if (++driver_config->config_dev_cnt > max_config_dev) {
        ret = 0;
        goto _exit0;
    }

    device_config = kzalloc(sizeof(struct vxge_hw_device_config),
        GFP_KERNEL);
    if (!device_config) {
        ret = -ENOMEM;
        vxge_debug_init(VXGE_ERR,
            "device_config : malloc failed %s %d",
            __FILE__, __LINE__);
        goto _exit0;
    }

    ll_config = kzalloc(sizeof(struct vxge_config), GFP_KERNEL);
    if (!ll_config) {
        ret = -ENOMEM;
        vxge_debug_init(VXGE_ERR,
            "device_config : malloc failed %s %d",
            __FILE__, __LINE__);
        goto _exit0;
    }
    ll_config->tx_steering_type = TX_MULTIQ_STEERING;
    ll_config->intr_type = MSI_X;
    ll_config->napi_weight = NEW_NAPI_WEIGHT;
    ll_config->rth_steering = RTH_STEERING;

    /* get the default configuration parameters */
    vxge_hw_device_config_default_get(device_config);

    /* initialize configuration parameters */
    vxge_device_config_init(device_config, &ll_config->intr_type);

    ret = pci_enable_device(pdev);
    if (ret) {
        vxge_debug_init(VXGE_ERR,
            "%s : can not enable PCI device", __func__);
        goto _exit0;
    }

    if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
        vxge_debug_ll_config(VXGE_TRACE,
            "%s : using 64bit DMA", __func__);

        high_dma = 1;

        if (pci_set_consistent_dma_mask(pdev,
                        DMA_BIT_MASK(64))) {
            vxge_debug_init(VXGE_ERR,
                "%s : unable to obtain 64bit DMA for "
                "consistent allocations", __func__);
            ret = -ENOMEM;
            goto _exit1;
        }
    } else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) {
        vxge_debug_ll_config(VXGE_TRACE,
            "%s : using 32bit DMA", __func__);
    } else {
        ret = -ENOMEM;
        goto _exit1;
    }

    ret = pci_request_region(pdev, 0, VXGE_DRIVER_NAME);
    if (ret) {
        vxge_debug_init(VXGE_ERR,
            "%s : request regions failed", __func__);
        goto _exit1;
    }

    pci_set_master(pdev);

    attr.bar0 = pci_ioremap_bar(pdev, 0);
    if (!attr.bar0) {
        vxge_debug_init(VXGE_ERR,
            "%s : cannot remap io memory bar0", __func__);
        ret = -ENODEV;
        goto _exit2;
    }
    vxge_debug_ll_config(VXGE_TRACE,
        "pci ioremap bar0: %p:0x%llx",
        attr.bar0,
        (unsigned long long)pci_resource_start(pdev, 0));

    status = vxge_hw_device_hw_info_get(attr.bar0,
            &ll_config->device_hw_info);
    if (status != VXGE_HW_OK) {
        vxge_debug_init(VXGE_ERR,
            "%s: Reading of hardware info failed."
            "Please try upgrading the firmware.", VXGE_DRIVER_NAME);
        ret = -EINVAL;
        goto _exit3;
    }

    vpath_mask = ll_config->device_hw_info.vpath_mask;
    if (vpath_mask == 0) {
        vxge_debug_ll_config(VXGE_TRACE,
            "%s: No vpaths available in device", VXGE_DRIVER_NAME);
        ret = -EINVAL;
        goto _exit3;
    }

    vxge_debug_ll_config(VXGE_TRACE,
        "%s:%d  Vpath mask = %llx", __func__, __LINE__,
        (unsigned long long)vpath_mask);

    function_mode = ll_config->device_hw_info.function_mode;
    host_type = ll_config->device_hw_info.host_type;
    is_privileged = __vxge_hw_device_is_privilaged(host_type,
        ll_config->device_hw_info.func_id);

    /* Check how many vpaths are available */
    for (i = 0; i < VXGE_HW_MAX_VIRTUAL_PATHS; i++) {
        if (!((vpath_mask) & vxge_mBIT(i)))
            continue;
        max_vpath_supported++;
    }

    if (new_device)
        num_vfs = vxge_get_num_vfs(function_mode) - 1;

    /* Enable SRIOV mode, if firmware has SRIOV support and if it is a PF */
    if (is_sriov(function_mode) && !is_sriov_initialized(pdev) &&
       (ll_config->intr_type != INTA)) {
        ret = pci_enable_sriov(pdev, num_vfs);
        if (ret)
            vxge_debug_ll_config(VXGE_ERR,
                "Failed in enabling SRIOV mode: %d\n", ret);
            /* No need to fail out, as an error here is non-fatal */
    }

    /*
     * Configure vpaths and get driver configured number of vpaths
     * which is less than or equal to the maximum vpaths per function.
     */
    no_of_vpath = vxge_config_vpaths(device_config, vpath_mask, ll_config);
    if (!no_of_vpath) {
        vxge_debug_ll_config(VXGE_ERR,
            "%s: No more vpaths to configure", VXGE_DRIVER_NAME);
        ret = 0;
        goto _exit3;
    }

    /* Setting driver callbacks */
    attr.uld_callbacks = &vxge_callbacks;

    status = vxge_hw_device_initialize(&hldev, &attr, device_config);
    if (status != VXGE_HW_OK) {
        vxge_debug_init(VXGE_ERR,
            "Failed to initialize device (%d)", status);
            ret = -EINVAL;
            goto _exit3;
    }

    if (VXGE_FW_VER(ll_config->device_hw_info.fw_version.major,
            ll_config->device_hw_info.fw_version.minor,
            ll_config->device_hw_info.fw_version.build) >=
        VXGE_EPROM_FW_VER) {
        struct eprom_image img[VXGE_HW_MAX_ROM_IMAGES];

        status = vxge_hw_vpath_eprom_img_ver_get(hldev, img);
        if (status != VXGE_HW_OK) {
            vxge_debug_init(VXGE_ERR, "%s: Reading of EPROM failed",
                    VXGE_DRIVER_NAME);
            /* This is a non-fatal error, continue */
        }

        for (i = 0; i < VXGE_HW_MAX_ROM_IMAGES; i++) {
            hldev->eprom_versions[i] = img[i].version;
            if (!img[i].is_valid)
                break;
            vxge_debug_init(VXGE_TRACE, "%s: EPROM %d, version "
                    "%d.%d.%d.%d", VXGE_DRIVER_NAME, i,
                    VXGE_EPROM_IMG_MAJOR(img[i].version),
                    VXGE_EPROM_IMG_MINOR(img[i].version),
                    VXGE_EPROM_IMG_FIX(img[i].version),
                    VXGE_EPROM_IMG_BUILD(img[i].version));
        }
    }

    /* if FCS stripping is not disabled in MAC fail driver load */
    status = vxge_hw_vpath_strip_fcs_check(hldev, vpath_mask);
    if (status != VXGE_HW_OK) {
        vxge_debug_init(VXGE_ERR, "%s: FCS stripping is enabled in MAC"
                " failing driver load", VXGE_DRIVER_NAME);
        ret = -EINVAL;
        goto _exit4;
    }

    /* Always enable HWTS.  This will always cause the FCS to be invalid,
     * due to the fact that HWTS is using the FCS as the location of the
     * timestamp.  The HW FCS checking will still correctly determine if
     * there is a valid checksum, and the FCS is being removed by the driver
     * anyway.  So no fucntionality is being lost.  Since it is always
     * enabled, we now simply use the ioctl call to set whether or not the
     * driver should be paying attention to the HWTS.
     */
    if (is_privileged == VXGE_HW_OK) {
        status = vxge_timestamp_config(hldev);
        if (status != VXGE_HW_OK) {
            vxge_debug_init(VXGE_ERR, "%s: HWTS enable failed",
                    VXGE_DRIVER_NAME);
            ret = -EFAULT;
            goto _exit4;
        }
    }

    vxge_hw_device_debug_set(hldev, VXGE_ERR, VXGE_COMPONENT_LL);

    /* set private device info */
    pci_set_drvdata(pdev, hldev);

    ll_config->fifo_indicate_max_pkts = VXGE_FIFO_INDICATE_MAX_PKTS;
    ll_config->addr_learn_en = addr_learn_en;
    ll_config->rth_algorithm = RTH_ALG_JENKINS;
    ll_config->rth_hash_type_tcpipv4 = 1;
    ll_config->rth_hash_type_ipv4 = 0;
    ll_config->rth_hash_type_tcpipv6 = 0;
    ll_config->rth_hash_type_ipv6 = 0;
    ll_config->rth_hash_type_tcpipv6ex = 0;
    ll_config->rth_hash_type_ipv6ex = 0;
    ll_config->rth_bkt_sz = RTH_BUCKET_SIZE;
    ll_config->tx_pause_enable = VXGE_PAUSE_CTRL_ENABLE;
    ll_config->rx_pause_enable = VXGE_PAUSE_CTRL_ENABLE;

    ret = vxge_device_register(hldev, ll_config, high_dma, no_of_vpath,
                   &vdev);
    if (ret) {
        ret = -EINVAL;
        goto _exit4;
    }

    ret = vxge_probe_fw_update(vdev);
    if (ret)
        goto _exit5;

    vxge_hw_device_debug_set(hldev, VXGE_TRACE, VXGE_COMPONENT_LL);
    VXGE_COPY_DEBUG_INFO_TO_LL(vdev, vxge_hw_device_error_level_get(hldev),
        vxge_hw_device_trace_level_get(hldev));

    /* set private HW device info */
    vdev->mtu = VXGE_HW_DEFAULT_MTU;
    vdev->bar0 = attr.bar0;
    vdev->max_vpath_supported = max_vpath_supported;
    vdev->no_of_vpath = no_of_vpath;

    /* Virtual Path count */
    for (i = 0, j = 0; i < VXGE_HW_MAX_VIRTUAL_PATHS; i++) {
        if (!vxge_bVALn(vpath_mask, i, 1))
            continue;
        if (j >= vdev->no_of_vpath)
            break;

        vdev->vpaths[j].is_configured = 1;
        vdev->vpaths[j].device_id = i;
        vdev->vpaths[j].ring.driver_id = j;
        vdev->vpaths[j].vdev = vdev;
        vdev->vpaths[j].max_mac_addr_cnt = max_mac_vpath;
        memcpy((u8 *)vdev->vpaths[j].macaddr,
                ll_config->device_hw_info.mac_addrs[i],
                ETH_ALEN);

        /* Initialize the mac address list header */
        INIT_LIST_HEAD(&vdev->vpaths[j].mac_addr_list);

        vdev->vpaths[j].mac_addr_cnt = 0;
        vdev->vpaths[j].mcast_addr_cnt = 0;
        j++;
    }
    vdev->exec_mode = VXGE_EXEC_MODE_DISABLE;
    vdev->max_config_port = max_config_port;

    vdev->vlan_tag_strip = vlan_tag_strip;

    /* map the hashing selector table to the configured vpaths */
    for (i = 0; i < vdev->no_of_vpath; i++)
        vdev->vpath_selector[i] = vpath_selector[i];

    macaddr = (u8 *)vdev->vpaths[0].macaddr;

    ll_config->device_hw_info.serial_number[VXGE_HW_INFO_LEN - 1] = '\0';
    ll_config->device_hw_info.product_desc[VXGE_HW_INFO_LEN - 1] = '\0';
    ll_config->device_hw_info.part_number[VXGE_HW_INFO_LEN - 1] = '\0';

    vxge_debug_init(VXGE_TRACE, "%s: SERIAL NUMBER: %s",
        vdev->ndev->name, ll_config->device_hw_info.serial_number);

    vxge_debug_init(VXGE_TRACE, "%s: PART NUMBER: %s",
        vdev->ndev->name, ll_config->device_hw_info.part_number);

    vxge_debug_init(VXGE_TRACE, "%s: Neterion %s Server Adapter",
        vdev->ndev->name, ll_config->device_hw_info.product_desc);

    vxge_debug_init(VXGE_TRACE, "%s: MAC ADDR: %pM",
        vdev->ndev->name, macaddr);

    vxge_debug_init(VXGE_TRACE, "%s: Link Width x%d",
        vdev->ndev->name, vxge_hw_device_link_width_get(hldev));

    vxge_debug_init(VXGE_TRACE,
        "%s: Firmware version : %s Date : %s", vdev->ndev->name,
        ll_config->device_hw_info.fw_version.version,
        ll_config->device_hw_info.fw_date.date);

    if (new_device) {
        switch (ll_config->device_hw_info.function_mode) {
        case VXGE_HW_FUNCTION_MODE_SINGLE_FUNCTION:
            vxge_debug_init(VXGE_TRACE,
            "%s: Single Function Mode Enabled", vdev->ndev->name);
        break;
        case VXGE_HW_FUNCTION_MODE_MULTI_FUNCTION:
            vxge_debug_init(VXGE_TRACE,
            "%s: Multi Function Mode Enabled", vdev->ndev->name);
        break;
        case VXGE_HW_FUNCTION_MODE_SRIOV:
            vxge_debug_init(VXGE_TRACE,
            "%s: Single Root IOV Mode Enabled", vdev->ndev->name);
        break;
        case VXGE_HW_FUNCTION_MODE_MRIOV:
            vxge_debug_init(VXGE_TRACE,
            "%s: Multi Root IOV Mode Enabled", vdev->ndev->name);
        break;
        }
    }

    vxge_print_parm(vdev, vpath_mask);

    /* Store the fw version for ethttool option */
    strcpy(vdev->fw_version, ll_config->device_hw_info.fw_version.version);
    memcpy(vdev->ndev->dev_addr, (u8 *)vdev->vpaths[0].macaddr, ETH_ALEN);
    memcpy(vdev->ndev->perm_addr, vdev->ndev->dev_addr, ETH_ALEN);

    /* Copy the station mac address to the list */
    for (i = 0; i < vdev->no_of_vpath; i++) {
        entry = kzalloc(sizeof(struct vxge_mac_addrs), GFP_KERNEL);
        if (NULL == entry) {
            vxge_debug_init(VXGE_ERR,
                "%s: mac_addr_list : memory allocation failed",
                vdev->ndev->name);
            ret = -EPERM;
            goto _exit6;
        }
        macaddr = (u8 *)&entry->macaddr;
        memcpy(macaddr, vdev->ndev->dev_addr, ETH_ALEN);
        list_add(&entry->item, &vdev->vpaths[i].mac_addr_list);
        vdev->vpaths[i].mac_addr_cnt = 1;
    }

    kfree(device_config);

    /*
     * INTA is shared in multi-function mode. This is unlike the INTA
     * implementation in MR mode, where each VH has its own INTA message.
     * - INTA is masked (disabled) as long as at least one function sets
     * its TITAN_MASK_ALL_INT.ALARM bit.
     * - INTA is unmasked (enabled) when all enabled functions have cleared
     * their own TITAN_MASK_ALL_INT.ALARM bit.
     * The TITAN_MASK_ALL_INT ALARM & TRAFFIC bits are cleared on power up.
     * Though this driver leaves the top level interrupts unmasked while
     * leaving the required module interrupt bits masked on exit, there
     * could be a rougue driver around that does not follow this procedure
     * resulting in a failure to generate interrupts. The following code is
     * present to prevent such a failure.
     */

    if (ll_config->device_hw_info.function_mode ==
        VXGE_HW_FUNCTION_MODE_MULTI_FUNCTION)
        if (vdev->config.intr_type == INTA)
            vxge_hw_device_unmask_all(hldev);

    vxge_debug_entryexit(VXGE_TRACE, "%s: %s:%d  Exiting...",
        vdev->ndev->name, __func__, __LINE__);

    vxge_hw_device_debug_set(hldev, VXGE_ERR, VXGE_COMPONENT_LL);
    VXGE_COPY_DEBUG_INFO_TO_LL(vdev, vxge_hw_device_error_level_get(hldev),
        vxge_hw_device_trace_level_get(hldev));

    kfree(ll_config);
    return 0;

_exit6:
    for (i = 0; i < vdev->no_of_vpath; i++)
        vxge_free_mac_add_list(&vdev->vpaths[i]);
_exit5:
    vxge_device_unregister(hldev);
_exit4:
    pci_set_drvdata(pdev, NULL);
    vxge_hw_device_terminate(hldev);
    pci_disable_sriov(pdev);
_exit3:
    iounmap(attr.bar0);
_exit2:
    pci_release_region(pdev, 0);
_exit1:
    pci_disable_device(pdev);
_exit0:
    kfree(ll_config);
    kfree(device_config);
    driver_config->config_dev_cnt--;
    driver_config->total_dev_cnt--;
    return ret;
}

static void __devexit vxge_remove(struct pci_dev *pdev)
{
    struct __vxge_hw_device *hldev;
    struct vxgedev *vdev;
    int i;

    hldev = pci_get_drvdata(pdev);
    if (hldev == NULL)
        return;

    vdev = netdev_priv(hldev->ndev);

    vxge_debug_entryexit(vdev->level_trace, "%s:%d", __func__, __LINE__);
    vxge_debug_init(vdev->level_trace, "%s : removing PCI device...",
            __func__);

    for (i = 0; i < vdev->no_of_vpath; i++)
        vxge_free_mac_add_list(&vdev->vpaths[i]);

    vxge_device_unregister(hldev);
    pci_set_drvdata(pdev, NULL);
    /* Do not call pci_disable_sriov here, as it will break child devices */
    vxge_hw_device_terminate(hldev);
    iounmap(vdev->bar0);
    pci_release_region(pdev, 0);
    pci_disable_device(pdev);
    driver_config->config_dev_cnt--;
    driver_config->total_dev_cnt--;

    vxge_debug_init(vdev->level_trace, "%s:%d Device unregistered",
            __func__, __LINE__);
    vxge_debug_entryexit(vdev->level_trace, "%s:%d  Exiting...", __func__,
                 __LINE__);
}

static const struct pci_error_handlers vxge_err_handler = {
    .error_detected = vxge_io_error_detected,
    .slot_reset = vxge_io_slot_reset,
    .resume = vxge_io_resume,
};

static struct pci_driver vxge_driver = {
    .name = VXGE_DRIVER_NAME,
    .id_table = vxge_id_table,
    .probe = vxge_probe,
    .remove = __devexit_p(vxge_remove),
#ifdef CONFIG_PM
    .suspend = vxge_pm_suspend,
    .resume = vxge_pm_resume,
#endif
    .err_handler = &vxge_err_handler,
};

static int __init
vxge_starter(void)
{
    int ret = 0;

    pr_info("Copyright(c) 2002-2010 Exar Corp.\n");
    pr_info("Driver version: %s\n", DRV_VERSION);

    verify_bandwidth();

    driver_config = kzalloc(sizeof(struct vxge_drv_config), GFP_KERNEL);
    if (!driver_config)
        return -ENOMEM;

    ret = pci_register_driver(&vxge_driver);
    if (ret) {
        kfree(driver_config);
        goto err;
    }

    if (driver_config->config_dev_cnt &&
       (driver_config->config_dev_cnt != driver_config->total_dev_cnt))
        vxge_debug_init(VXGE_ERR,
            "%s: Configured %d of %d devices",
            VXGE_DRIVER_NAME, driver_config->config_dev_cnt,
            driver_config->total_dev_cnt);
err:
    return ret;
}

static void __exit
vxge_closer(void)
{
    pci_unregister_driver(&vxge_driver);
    kfree(driver_config);
}
module_init(vxge_starter);
module_exit(vxge_closer);