/*
 * QLogic qlcnic NIC Driver
 * Copyright (c)  2009-2010 QLogic Corporation
 *
 * See LICENSE.qlcnic for copyright and licensing details.
 */

#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/interrupt.h>

#include "qlcnic.h"

#include <linux/swab.h>
#include <linux/dma-mapping.h>
#include <net/ip.h>
#include <linux/ipv6.h>
#include <linux/inetdevice.h>
#include <linux/sysfs.h>
#include <linux/aer.h>
#include <linux/log2.h>

MODULE_DESCRIPTION("QLogic 1/10 GbE Converged/Intelligent Ethernet Driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(QLCNIC_LINUX_VERSIONID);
MODULE_FIRMWARE(QLCNIC_UNIFIED_ROMIMAGE_NAME);

char qlcnic_driver_name[] = "qlcnic";
static const char qlcnic_driver_string[] = "QLogic 1/10 GbE "
        "Converged/Intelligent Ethernet Driver v" QLCNIC_LINUX_VERSIONID;

static struct workqueue_struct *qlcnic_wq;
static int qlcnic_mac_learn;
module_param(qlcnic_mac_learn, int, 0444);
MODULE_PARM_DESC(qlcnic_mac_learn, "Mac Filter (0=disabled, 1=enabled)");

static int use_msi = 1;
module_param(use_msi, int, 0444);
MODULE_PARM_DESC(use_msi, "MSI interrupt (0=disabled, 1=enabled");

static int use_msi_x = 1;
module_param(use_msi_x, int, 0444);
MODULE_PARM_DESC(use_msi_x, "MSI-X interrupt (0=disabled, 1=enabled");

static int auto_fw_reset = 1;
module_param(auto_fw_reset, int, 0644);
MODULE_PARM_DESC(auto_fw_reset, "Auto firmware reset (0=disabled, 1=enabled");

static int load_fw_file;
module_param(load_fw_file, int, 0444);
MODULE_PARM_DESC(load_fw_file, "Load firmware from (0=flash, 1=file");

static int qlcnic_config_npars;
module_param(qlcnic_config_npars, int, 0444);
MODULE_PARM_DESC(qlcnic_config_npars, "Configure NPARs (0=disabled, 1=enabled");

static int __devinit qlcnic_probe(struct pci_dev *pdev,
                const struct pci_device_id *ent);
static void __devexit qlcnic_remove(struct pci_dev *pdev);
static int qlcnic_open(struct net_device *netdev);
static int qlcnic_close(struct net_device *netdev);
static void qlcnic_tx_timeout(struct net_device *netdev);
static void qlcnic_attach_work(struct work_struct *work);
static void qlcnic_fwinit_work(struct work_struct *work);
static void qlcnic_fw_poll_work(struct work_struct *work);
static void qlcnic_schedule_work(struct qlcnic_adapter *adapter,
                work_func_t func, int delay);
static void qlcnic_cancel_fw_work(struct qlcnic_adapter *adapter);
static int qlcnic_poll(struct napi_struct *napi, int budget);
static int qlcnic_rx_poll(struct napi_struct *napi, int budget);
#ifdef CONFIG_NET_POLL_CONTROLLER
static void qlcnic_poll_controller(struct net_device *netdev);
#endif

static void qlcnic_create_sysfs_entries(struct qlcnic_adapter *adapter);
static void qlcnic_remove_sysfs_entries(struct qlcnic_adapter *adapter);
static void qlcnic_create_diag_entries(struct qlcnic_adapter *adapter);
static void qlcnic_remove_diag_entries(struct qlcnic_adapter *adapter);

static void qlcnic_idc_debug_info(struct qlcnic_adapter *adapter, u8 encoding);
static void qlcnic_clr_all_drv_state(struct qlcnic_adapter *adapter, u8);
static int qlcnic_can_start_firmware(struct qlcnic_adapter *adapter);

static irqreturn_t qlcnic_tmp_intr(int irq, void *data);
static irqreturn_t qlcnic_intr(int irq, void *data);
static irqreturn_t qlcnic_msi_intr(int irq, void *data);
static irqreturn_t qlcnic_msix_intr(int irq, void *data);

static struct net_device_stats *qlcnic_get_stats(struct net_device *netdev);
static void qlcnic_restore_indev_addr(struct net_device *dev, unsigned long);
static int qlcnic_start_firmware(struct qlcnic_adapter *);

static void qlcnic_free_lb_filters_mem(struct qlcnic_adapter *adapter);
static void qlcnic_dev_set_npar_ready(struct qlcnic_adapter *);
static int qlcnicvf_config_led(struct qlcnic_adapter *, u32, u32);
static int qlcnicvf_config_bridged_mode(struct qlcnic_adapter *, u32);
static int qlcnicvf_start_firmware(struct qlcnic_adapter *);
static void qlcnic_set_netdev_features(struct qlcnic_adapter *,
                                struct qlcnic_esw_func_cfg *);
static void qlcnic_vlan_rx_add(struct net_device *, u16);
static void qlcnic_vlan_rx_del(struct net_device *, u16);

/*  PCI Device ID Table  */
#define ENTRY(device) \
        {PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, (device)), \
        .class = PCI_CLASS_NETWORK_ETHERNET << 8, .class_mask = ~0}

#define PCI_DEVICE_ID_QLOGIC_QLE824X  0x8020

static DEFINE_PCI_DEVICE_TABLE(qlcnic_pci_tbl) = {
        ENTRY(PCI_DEVICE_ID_QLOGIC_QLE824X),
        {0,}
};

MODULE_DEVICE_TABLE(pci, qlcnic_pci_tbl);


inline void
qlcnic_update_cmd_producer(struct qlcnic_adapter *adapter,
                struct qlcnic_host_tx_ring *tx_ring)
{
        writel(tx_ring->producer, tx_ring->crb_cmd_producer);
}

static const u32 msi_tgt_status[8] = {
        ISR_INT_TARGET_STATUS, ISR_INT_TARGET_STATUS_F1,
        ISR_INT_TARGET_STATUS_F2, ISR_INT_TARGET_STATUS_F3,
        ISR_INT_TARGET_STATUS_F4, ISR_INT_TARGET_STATUS_F5,
        ISR_INT_TARGET_STATUS_F6, ISR_INT_TARGET_STATUS_F7
};

static const
struct qlcnic_legacy_intr_set legacy_intr[] = QLCNIC_LEGACY_INTR_CONFIG;

static inline void qlcnic_disable_int(struct qlcnic_host_sds_ring *sds_ring)
{
        writel(0, sds_ring->crb_intr_mask);
}

static inline void qlcnic_enable_int(struct qlcnic_host_sds_ring *sds_ring)
{
        struct qlcnic_adapter *adapter = sds_ring->adapter;

        writel(0x1, sds_ring->crb_intr_mask);

        if (!QLCNIC_IS_MSI_FAMILY(adapter))
                writel(0xfbff, adapter->tgt_mask_reg);
}

static int
qlcnic_alloc_sds_rings(struct qlcnic_recv_context *recv_ctx, int count)
{
        int size = sizeof(struct qlcnic_host_sds_ring) * count;

        recv_ctx->sds_rings = kzalloc(size, GFP_KERNEL);

        return recv_ctx->sds_rings == NULL;
}

static void
qlcnic_free_sds_rings(struct qlcnic_recv_context *recv_ctx)
{
        if (recv_ctx->sds_rings != NULL)
                kfree(recv_ctx->sds_rings);

        recv_ctx->sds_rings = NULL;
}

static int
qlcnic_napi_add(struct qlcnic_adapter *adapter, struct net_device *netdev)
{
        int ring;
        struct qlcnic_host_sds_ring *sds_ring;
        struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;

        if (qlcnic_alloc_sds_rings(recv_ctx, adapter->max_sds_rings))
                return -ENOMEM;

        for (ring = 0; ring < adapter->max_sds_rings; ring++) {
                sds_ring = &recv_ctx->sds_rings[ring];

                if (ring == adapter->max_sds_rings - 1)
                        netif_napi_add(netdev, &sds_ring->napi, qlcnic_poll,
                                QLCNIC_NETDEV_WEIGHT/adapter->max_sds_rings);
                else
                        netif_napi_add(netdev, &sds_ring->napi,
                                qlcnic_rx_poll, QLCNIC_NETDEV_WEIGHT*2);
        }

        return 0;
}

static void
qlcnic_napi_del(struct qlcnic_adapter *adapter)
{
        int ring;
        struct qlcnic_host_sds_ring *sds_ring;
        struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;

        for (ring = 0; ring < adapter->max_sds_rings; ring++) {
                sds_ring = &recv_ctx->sds_rings[ring];
                netif_napi_del(&sds_ring->napi);
        }

        qlcnic_free_sds_rings(adapter->recv_ctx);
}

static void
qlcnic_napi_enable(struct qlcnic_adapter *adapter)
{
        int ring;
        struct qlcnic_host_sds_ring *sds_ring;
        struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;

        if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
                return;

        for (ring = 0; ring < adapter->max_sds_rings; ring++) {
                sds_ring = &recv_ctx->sds_rings[ring];
                napi_enable(&sds_ring->napi);
                qlcnic_enable_int(sds_ring);
        }
}

static void
qlcnic_napi_disable(struct qlcnic_adapter *adapter)
{
        int ring;
        struct qlcnic_host_sds_ring *sds_ring;
        struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;

        if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
                return;

        for (ring = 0; ring < adapter->max_sds_rings; ring++) {
                sds_ring = &recv_ctx->sds_rings[ring];
                qlcnic_disable_int(sds_ring);
                napi_synchronize(&sds_ring->napi);
                napi_disable(&sds_ring->napi);
        }
}

static void qlcnic_clear_stats(struct qlcnic_adapter *adapter)
{
        memset(&adapter->stats, 0, sizeof(adapter->stats));
}

static void qlcnic_set_msix_bit(struct pci_dev *pdev, int enable)
{
        u32 control;
        int pos;

        pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
        if (pos) {
                pci_read_config_dword(pdev, pos, &control);
                if (enable)
                        control |= PCI_MSIX_FLAGS_ENABLE;
                else
                        control = 0;
                pci_write_config_dword(pdev, pos, control);
        }
}

static void qlcnic_init_msix_entries(struct qlcnic_adapter *adapter, int count)
{
        int i;

        for (i = 0; i < count; i++)
                adapter->msix_entries[i].entry = i;
}

static int
qlcnic_read_mac_addr(struct qlcnic_adapter *adapter)
{
        u8 mac_addr[ETH_ALEN];
        struct net_device *netdev = adapter->netdev;
        struct pci_dev *pdev = adapter->pdev;

        if (qlcnic_get_mac_address(adapter, mac_addr) != 0)
                return -EIO;

        memcpy(netdev->dev_addr, mac_addr, ETH_ALEN);
        memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
        memcpy(adapter->mac_addr, netdev->dev_addr, netdev->addr_len);

        /* set station address */

        if (!is_valid_ether_addr(netdev->perm_addr))
                dev_warn(&pdev->dev, "Bad MAC address %pM.\n",
                                        netdev->dev_addr);

        return 0;
}

static int qlcnic_set_mac(struct net_device *netdev, void *p)
{
        struct qlcnic_adapter *adapter = netdev_priv(netdev);
        struct sockaddr *addr = p;

        if ((adapter->flags & QLCNIC_MAC_OVERRIDE_DISABLED))
                return -EOPNOTSUPP;

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

        if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) {
                netif_device_detach(netdev);
                qlcnic_napi_disable(adapter);
        }

        memcpy(adapter->mac_addr, addr->sa_data, netdev->addr_len);
        memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
        qlcnic_set_multi(adapter->netdev);

        if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) {
                netif_device_attach(netdev);
                qlcnic_napi_enable(adapter);
        }
        return 0;
}

static const struct net_device_ops qlcnic_netdev_ops = {
        .ndo_open          = qlcnic_open,
        .ndo_stop          = qlcnic_close,
        .ndo_start_xmit    = qlcnic_xmit_frame,
        .ndo_get_stats     = qlcnic_get_stats,
        .ndo_validate_addr = eth_validate_addr,
        .ndo_set_rx_mode   = qlcnic_set_multi,
        .ndo_set_mac_address    = qlcnic_set_mac,
        .ndo_change_mtu    = qlcnic_change_mtu,
        .ndo_fix_features  = qlcnic_fix_features,
        .ndo_set_features  = qlcnic_set_features,
        .ndo_tx_timeout    = qlcnic_tx_timeout,
        .ndo_vlan_rx_add_vid    = qlcnic_vlan_rx_add,
        .ndo_vlan_rx_kill_vid   = qlcnic_vlan_rx_del,
#ifdef CONFIG_NET_POLL_CONTROLLER
        .ndo_poll_controller = qlcnic_poll_controller,
#endif
};

static struct qlcnic_nic_template qlcnic_ops = {
        .config_bridged_mode = qlcnic_config_bridged_mode,
        .config_led = qlcnic_config_led,
        .start_firmware = qlcnic_start_firmware
};

static struct qlcnic_nic_template qlcnic_vf_ops = {
        .config_bridged_mode = qlcnicvf_config_bridged_mode,
        .config_led = qlcnicvf_config_led,
        .start_firmware = qlcnicvf_start_firmware
};

static int qlcnic_enable_msix(struct qlcnic_adapter *adapter, u32 num_msix)
{
        struct pci_dev *pdev = adapter->pdev;
        int err = -1;

        adapter->max_sds_rings = 1;
        adapter->flags &= ~(QLCNIC_MSI_ENABLED | QLCNIC_MSIX_ENABLED);
        qlcnic_set_msix_bit(pdev, 0);

        if (adapter->msix_supported) {
 enable_msix:
                qlcnic_init_msix_entries(adapter, num_msix);
                err = pci_enable_msix(pdev, adapter->msix_entries, num_msix);
                if (err == 0) {
                        adapter->flags |= QLCNIC_MSIX_ENABLED;
                        qlcnic_set_msix_bit(pdev, 1);

                        adapter->max_sds_rings = num_msix;

                        dev_info(&pdev->dev, "using msi-x interrupts\n");
                        return err;
                }
                if (err > 0) {
                        num_msix = rounddown_pow_of_two(err);
                        if (num_msix)
                                goto enable_msix;
                }
        }
        return err;
}


static void qlcnic_enable_msi_legacy(struct qlcnic_adapter *adapter)
{
        const struct qlcnic_legacy_intr_set *legacy_intrp;
        struct pci_dev *pdev = adapter->pdev;

        if (use_msi && !pci_enable_msi(pdev)) {
                adapter->flags |= QLCNIC_MSI_ENABLED;
                adapter->tgt_status_reg = qlcnic_get_ioaddr(adapter,
                                msi_tgt_status[adapter->ahw->pci_func]);
                dev_info(&pdev->dev, "using msi interrupts\n");
                adapter->msix_entries[0].vector = pdev->irq;
                return;
        }

        legacy_intrp = &legacy_intr[adapter->ahw->pci_func];

        adapter->int_vec_bit = legacy_intrp->int_vec_bit;
        adapter->tgt_status_reg = qlcnic_get_ioaddr(adapter,
                        legacy_intrp->tgt_status_reg);
        adapter->tgt_mask_reg = qlcnic_get_ioaddr(adapter,
                        legacy_intrp->tgt_mask_reg);
        adapter->isr_int_vec = qlcnic_get_ioaddr(adapter, ISR_INT_VECTOR);

        adapter->crb_int_state_reg = qlcnic_get_ioaddr(adapter,
                        ISR_INT_STATE_REG);
        dev_info(&pdev->dev, "using legacy interrupts\n");
        adapter->msix_entries[0].vector = pdev->irq;
}

static void
qlcnic_setup_intr(struct qlcnic_adapter *adapter)
{
        int num_msix;

        if (adapter->msix_supported) {
                num_msix = rounddown_pow_of_two(min_t(int, num_online_cpus(),
                                QLCNIC_DEF_NUM_STS_DESC_RINGS));
        } else
                num_msix = 1;

        if (!qlcnic_enable_msix(adapter, num_msix))
                return;

        qlcnic_enable_msi_legacy(adapter);
}

static void
qlcnic_teardown_intr(struct qlcnic_adapter *adapter)
{
        if (adapter->flags & QLCNIC_MSIX_ENABLED)
                pci_disable_msix(adapter->pdev);
        if (adapter->flags & QLCNIC_MSI_ENABLED)
                pci_disable_msi(adapter->pdev);
}

static void
qlcnic_cleanup_pci_map(struct qlcnic_adapter *adapter)
{
        if (adapter->ahw->pci_base0 != NULL)
                iounmap(adapter->ahw->pci_base0);
}

static int
qlcnic_init_pci_info(struct qlcnic_adapter *adapter)
{
        struct qlcnic_pci_info *pci_info;
        int i, ret = 0;
        u8 pfn;

        pci_info = kcalloc(QLCNIC_MAX_PCI_FUNC, sizeof(*pci_info), GFP_KERNEL);
        if (!pci_info)
                return -ENOMEM;

        adapter->npars = kzalloc(sizeof(struct qlcnic_npar_info) *
                                QLCNIC_MAX_PCI_FUNC, GFP_KERNEL);
        if (!adapter->npars) {
                ret = -ENOMEM;
                goto err_pci_info;
        }

        adapter->eswitch = kzalloc(sizeof(struct qlcnic_eswitch) *
                                QLCNIC_NIU_MAX_XG_PORTS, GFP_KERNEL);
        if (!adapter->eswitch) {
                ret = -ENOMEM;
                goto err_npars;
        }

        ret = qlcnic_get_pci_info(adapter, pci_info);
        if (ret)
                goto err_eswitch;

        for (i = 0; i < QLCNIC_MAX_PCI_FUNC; i++) {
                pfn = pci_info[i].id;
                if (pfn > QLCNIC_MAX_PCI_FUNC) {
                        ret = QL_STATUS_INVALID_PARAM;
                        goto err_eswitch;
                }
                adapter->npars[pfn].active = (u8)pci_info[i].active;
                adapter->npars[pfn].type = (u8)pci_info[i].type;
                adapter->npars[pfn].phy_port = (u8)pci_info[i].default_port;
                adapter->npars[pfn].min_bw = pci_info[i].tx_min_bw;
                adapter->npars[pfn].max_bw = pci_info[i].tx_max_bw;
        }

        for (i = 0; i < QLCNIC_NIU_MAX_XG_PORTS; i++)
                adapter->eswitch[i].flags |= QLCNIC_SWITCH_ENABLE;

        kfree(pci_info);
        return 0;

err_eswitch:
        kfree(adapter->eswitch);
        adapter->eswitch = NULL;
err_npars:
        kfree(adapter->npars);
        adapter->npars = NULL;
err_pci_info:
        kfree(pci_info);

        return ret;
}

static int
qlcnic_set_function_modes(struct qlcnic_adapter *adapter)
{
        u8 id;
        u32 ref_count;
        int i, ret = 1;
        u32 data = QLCNIC_MGMT_FUNC;
        void __iomem *priv_op = adapter->ahw->pci_base0 + QLCNIC_DRV_OP_MODE;

        /* If other drivers are not in use set their privilege level */
        ref_count = QLCRD32(adapter, QLCNIC_CRB_DRV_ACTIVE);
        ret = qlcnic_api_lock(adapter);
        if (ret)
                goto err_lock;

        if (qlcnic_config_npars) {
                for (i = 0; i < QLCNIC_MAX_PCI_FUNC; i++) {
                        id = i;
                        if (adapter->npars[i].type != QLCNIC_TYPE_NIC ||
                                id == adapter->ahw->pci_func)
                                continue;
                        data |= (qlcnic_config_npars &
                                        QLC_DEV_SET_DRV(0xf, id));
                }
        } else {
                data = readl(priv_op);
                data = (data & ~QLC_DEV_SET_DRV(0xf, adapter->ahw->pci_func)) |
                        (QLC_DEV_SET_DRV(QLCNIC_MGMT_FUNC,
                        adapter->ahw->pci_func));
        }
        writel(data, priv_op);
        qlcnic_api_unlock(adapter);
err_lock:
        return ret;
}

static void
qlcnic_check_vf(struct qlcnic_adapter *adapter)
{
        void __iomem *msix_base_addr;
        void __iomem *priv_op;
        u32 func;
        u32 msix_base;
        u32 op_mode, priv_level;

        /* Determine FW API version */
        adapter->fw_hal_version = readl(adapter->ahw->pci_base0 +
                                        QLCNIC_FW_API);

        /* Find PCI function number */
        pci_read_config_dword(adapter->pdev, QLCNIC_MSIX_TABLE_OFFSET, &func);
        msix_base_addr = adapter->ahw->pci_base0 + QLCNIC_MSIX_BASE;
        msix_base = readl(msix_base_addr);
        func = (func - msix_base)/QLCNIC_MSIX_TBL_PGSIZE;
        adapter->ahw->pci_func = func;

        /* Determine function privilege level */
        priv_op = adapter->ahw->pci_base0 + QLCNIC_DRV_OP_MODE;
        op_mode = readl(priv_op);
        if (op_mode == QLC_DEV_DRV_DEFAULT)
                priv_level = QLCNIC_MGMT_FUNC;
        else
                priv_level = QLC_DEV_GET_DRV(op_mode, adapter->ahw->pci_func);

        if (priv_level == QLCNIC_NON_PRIV_FUNC) {
                adapter->op_mode = QLCNIC_NON_PRIV_FUNC;
                dev_info(&adapter->pdev->dev,
                        "HAL Version: %d Non Privileged function\n",
                        adapter->fw_hal_version);
                adapter->nic_ops = &qlcnic_vf_ops;
        } else
                adapter->nic_ops = &qlcnic_ops;
}

static int
qlcnic_setup_pci_map(struct qlcnic_adapter *adapter)
{
        void __iomem *mem_ptr0 = NULL;
        resource_size_t mem_base;
        unsigned long mem_len, pci_len0 = 0;

        struct pci_dev *pdev = adapter->pdev;

        /* remap phys address */
        mem_base = pci_resource_start(pdev, 0); /* 0 is for BAR 0 */
        mem_len = pci_resource_len(pdev, 0);

        if (mem_len == QLCNIC_PCI_2MB_SIZE) {

                mem_ptr0 = pci_ioremap_bar(pdev, 0);
                if (mem_ptr0 == NULL) {
                        dev_err(&pdev->dev, "failed to map PCI bar 0\n");
                        return -EIO;
                }
                pci_len0 = mem_len;
        } else {
                return -EIO;
        }

        dev_info(&pdev->dev, "%dMB memory map\n", (int)(mem_len>>20));

        adapter->ahw->pci_base0 = mem_ptr0;
        adapter->ahw->pci_len0 = pci_len0;

        qlcnic_check_vf(adapter);

        adapter->ahw->ocm_win_crb = qlcnic_get_ioaddr(adapter,
                QLCNIC_PCIX_PS_REG(PCIX_OCM_WINDOW_REG(
                        adapter->ahw->pci_func)));

        return 0;
}

static void get_brd_name(struct qlcnic_adapter *adapter, char *name)
{
        struct pci_dev *pdev = adapter->pdev;
        int i, found = 0;

        for (i = 0; i < NUM_SUPPORTED_BOARDS; ++i) {
                if (qlcnic_boards[i].vendor == pdev->vendor &&
                        qlcnic_boards[i].device == pdev->device &&
                        qlcnic_boards[i].sub_vendor == pdev->subsystem_vendor &&
                        qlcnic_boards[i].sub_device == pdev->subsystem_device) {
                                sprintf(name, "%pM: %s" ,
                                        adapter->mac_addr,
                                        qlcnic_boards[i].short_name);
                                found = 1;
                                break;
                }

        }

        if (!found)
                sprintf(name, "%pM Gigabit Ethernet", adapter->mac_addr);
}

static void
qlcnic_check_options(struct qlcnic_adapter *adapter)
{
        u32 fw_major, fw_minor, fw_build, prev_fw_version;
        struct pci_dev *pdev = adapter->pdev;
        struct qlcnic_fw_dump *fw_dump = &adapter->ahw->fw_dump;

        prev_fw_version = adapter->fw_version;

        fw_major = QLCRD32(adapter, QLCNIC_FW_VERSION_MAJOR);
        fw_minor = QLCRD32(adapter, QLCNIC_FW_VERSION_MINOR);
        fw_build = QLCRD32(adapter, QLCNIC_FW_VERSION_SUB);

        adapter->fw_version = QLCNIC_VERSION_CODE(fw_major, fw_minor, fw_build);

        if (adapter->op_mode != QLCNIC_NON_PRIV_FUNC) {
                if (fw_dump->tmpl_hdr == NULL ||
                                adapter->fw_version > prev_fw_version) {
                        if (fw_dump->tmpl_hdr)
                                vfree(fw_dump->tmpl_hdr);
                        if (!qlcnic_fw_cmd_get_minidump_temp(adapter))
                                dev_info(&pdev->dev,
                                        "Supports FW dump capability\n");
                }
        }

        dev_info(&pdev->dev, "firmware v%d.%d.%d\n",
                        fw_major, fw_minor, fw_build);
        if (adapter->ahw->port_type == QLCNIC_XGBE) {
                if (adapter->flags & QLCNIC_ESWITCH_ENABLED) {
                        adapter->num_rxd = DEFAULT_RCV_DESCRIPTORS_VF;
                        adapter->max_rxd = MAX_RCV_DESCRIPTORS_VF;
                } else {
                        adapter->num_rxd = DEFAULT_RCV_DESCRIPTORS_10G;
                        adapter->max_rxd = MAX_RCV_DESCRIPTORS_10G;
                }

                adapter->num_jumbo_rxd = MAX_JUMBO_RCV_DESCRIPTORS_10G;
                adapter->max_jumbo_rxd = MAX_JUMBO_RCV_DESCRIPTORS_10G;

        } else if (adapter->ahw->port_type == QLCNIC_GBE) {
                adapter->num_rxd = DEFAULT_RCV_DESCRIPTORS_1G;
                adapter->num_jumbo_rxd = MAX_JUMBO_RCV_DESCRIPTORS_1G;
                adapter->max_jumbo_rxd = MAX_JUMBO_RCV_DESCRIPTORS_1G;
                adapter->max_rxd = MAX_RCV_DESCRIPTORS_1G;
        }

        adapter->msix_supported = !!use_msi_x;

        adapter->num_txd = MAX_CMD_DESCRIPTORS;

        adapter->max_rds_rings = MAX_RDS_RINGS;
}

static int
qlcnic_initialize_nic(struct qlcnic_adapter *adapter)
{
        int err;
        struct qlcnic_info nic_info;

        err = qlcnic_get_nic_info(adapter, &nic_info, adapter->ahw->pci_func);
        if (err)
                return err;

        adapter->physical_port = (u8)nic_info.phys_port;
        adapter->switch_mode = nic_info.switch_mode;
        adapter->max_tx_ques = nic_info.max_tx_ques;
        adapter->max_rx_ques = nic_info.max_rx_ques;
        adapter->capabilities = nic_info.capabilities;
        adapter->max_mac_filters = nic_info.max_mac_filters;
        adapter->max_mtu = nic_info.max_mtu;

        if (adapter->capabilities & BIT_6)
                adapter->flags |= QLCNIC_ESWITCH_ENABLED;
        else
                adapter->flags &= ~QLCNIC_ESWITCH_ENABLED;

        return err;
}

static void
qlcnic_set_vlan_config(struct qlcnic_adapter *adapter,
                struct qlcnic_esw_func_cfg *esw_cfg)
{
        if (esw_cfg->discard_tagged)
                adapter->flags &= ~QLCNIC_TAGGING_ENABLED;
        else
                adapter->flags |= QLCNIC_TAGGING_ENABLED;

        if (esw_cfg->vlan_id)
                adapter->pvid = esw_cfg->vlan_id;
        else
                adapter->pvid = 0;
}

static void
qlcnic_vlan_rx_add(struct net_device *netdev, u16 vid)
{
        struct qlcnic_adapter *adapter = netdev_priv(netdev);
        set_bit(vid, adapter->vlans);
}

static void
qlcnic_vlan_rx_del(struct net_device *netdev, u16 vid)
{
        struct qlcnic_adapter *adapter = netdev_priv(netdev);

        qlcnic_restore_indev_addr(netdev, NETDEV_DOWN);
        clear_bit(vid, adapter->vlans);
}

static void
qlcnic_set_eswitch_port_features(struct qlcnic_adapter *adapter,
                struct qlcnic_esw_func_cfg *esw_cfg)
{
        adapter->flags &= ~(QLCNIC_MACSPOOF | QLCNIC_MAC_OVERRIDE_DISABLED |
                                QLCNIC_PROMISC_DISABLED);

        if (esw_cfg->mac_anti_spoof)
                adapter->flags |= QLCNIC_MACSPOOF;

        if (!esw_cfg->mac_override)
                adapter->flags |= QLCNIC_MAC_OVERRIDE_DISABLED;

        if (!esw_cfg->promisc_mode)
                adapter->flags |= QLCNIC_PROMISC_DISABLED;

        qlcnic_set_netdev_features(adapter, esw_cfg);
}

static int
qlcnic_set_eswitch_port_config(struct qlcnic_adapter *adapter)
{
        struct qlcnic_esw_func_cfg esw_cfg;

        if (!(adapter->flags & QLCNIC_ESWITCH_ENABLED))
                return 0;

        esw_cfg.pci_func = adapter->ahw->pci_func;
        if (qlcnic_get_eswitch_port_config(adapter, &esw_cfg))
                        return -EIO;
        qlcnic_set_vlan_config(adapter, &esw_cfg);
        qlcnic_set_eswitch_port_features(adapter, &esw_cfg);

        return 0;
}

static void
qlcnic_set_netdev_features(struct qlcnic_adapter *adapter,
                struct qlcnic_esw_func_cfg *esw_cfg)
{
        struct net_device *netdev = adapter->netdev;
        unsigned long features, vlan_features;

        features = (NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_RXCSUM |
                        NETIF_F_IPV6_CSUM | NETIF_F_GRO);
        vlan_features = (NETIF_F_SG | NETIF_F_IP_CSUM |
                        NETIF_F_IPV6_CSUM | NETIF_F_HW_VLAN_FILTER);

        if (adapter->capabilities & QLCNIC_FW_CAPABILITY_TSO) {
                features |= (NETIF_F_TSO | NETIF_F_TSO6);
                vlan_features |= (NETIF_F_TSO | NETIF_F_TSO6);
        }

        if (netdev->features & NETIF_F_LRO)
                features |= NETIF_F_LRO;

        if (esw_cfg->offload_flags & BIT_0) {
                netdev->features |= features;
                if (!(esw_cfg->offload_flags & BIT_1))
                        netdev->features &= ~NETIF_F_TSO;
                if (!(esw_cfg->offload_flags & BIT_2))
                        netdev->features &= ~NETIF_F_TSO6;
        } else {
                netdev->features &= ~features;
        }

        netdev->vlan_features = (features & vlan_features);
}

static int
qlcnic_check_eswitch_mode(struct qlcnic_adapter *adapter)
{
        void __iomem *priv_op;
        u32 op_mode, priv_level;
        int err = 0;

        err = qlcnic_initialize_nic(adapter);
        if (err)
                return err;

        if (adapter->flags & QLCNIC_ADAPTER_INITIALIZED)
                return 0;

        priv_op = adapter->ahw->pci_base0 + QLCNIC_DRV_OP_MODE;
        op_mode = readl(priv_op);
        priv_level = QLC_DEV_GET_DRV(op_mode, adapter->ahw->pci_func);

        if (op_mode == QLC_DEV_DRV_DEFAULT)
                priv_level = QLCNIC_MGMT_FUNC;
        else
                priv_level = QLC_DEV_GET_DRV(op_mode, adapter->ahw->pci_func);

        if (adapter->flags & QLCNIC_ESWITCH_ENABLED) {
                if (priv_level == QLCNIC_MGMT_FUNC) {
                        adapter->op_mode = QLCNIC_MGMT_FUNC;
                        err = qlcnic_init_pci_info(adapter);
                        if (err)
                                return err;
                        /* Set privilege level for other functions */
                        qlcnic_set_function_modes(adapter);
                        dev_info(&adapter->pdev->dev,
                                "HAL Version: %d, Management function\n",
                                adapter->fw_hal_version);
                } else if (priv_level == QLCNIC_PRIV_FUNC) {
                        adapter->op_mode = QLCNIC_PRIV_FUNC;
                        dev_info(&adapter->pdev->dev,
                                "HAL Version: %d, Privileged function\n",
                                adapter->fw_hal_version);
                }
        }

        adapter->flags |= QLCNIC_ADAPTER_INITIALIZED;

        return err;
}

static int
qlcnic_set_default_offload_settings(struct qlcnic_adapter *adapter)
{
        struct qlcnic_esw_func_cfg esw_cfg;
        struct qlcnic_npar_info *npar;
        u8 i;

        if (adapter->need_fw_reset)
                return 0;

        for (i = 0; i < QLCNIC_MAX_PCI_FUNC; i++) {
                if (adapter->npars[i].type != QLCNIC_TYPE_NIC)
                        continue;
                memset(&esw_cfg, 0, sizeof(struct qlcnic_esw_func_cfg));
                esw_cfg.pci_func = i;
                esw_cfg.offload_flags = BIT_0;
                esw_cfg.mac_override = BIT_0;
                esw_cfg.promisc_mode = BIT_0;
                if (adapter->capabilities  & QLCNIC_FW_CAPABILITY_TSO)
                        esw_cfg.offload_flags |= (BIT_1 | BIT_2);
                if (qlcnic_config_switch_port(adapter, &esw_cfg))
                        return -EIO;
                npar = &adapter->npars[i];
                npar->pvid = esw_cfg.vlan_id;
                npar->mac_override = esw_cfg.mac_override;
                npar->mac_anti_spoof = esw_cfg.mac_anti_spoof;
                npar->discard_tagged = esw_cfg.discard_tagged;
                npar->promisc_mode = esw_cfg.promisc_mode;
                npar->offload_flags = esw_cfg.offload_flags;
        }

        return 0;
}

static int
qlcnic_reset_eswitch_config(struct qlcnic_adapter *adapter,
                        struct qlcnic_npar_info *npar, int pci_func)
{
        struct qlcnic_esw_func_cfg esw_cfg;
        esw_cfg.op_mode = QLCNIC_PORT_DEFAULTS;
        esw_cfg.pci_func = pci_func;
        esw_cfg.vlan_id = npar->pvid;
        esw_cfg.mac_override = npar->mac_override;
        esw_cfg.discard_tagged = npar->discard_tagged;
        esw_cfg.mac_anti_spoof = npar->mac_anti_spoof;
        esw_cfg.offload_flags = npar->offload_flags;
        esw_cfg.promisc_mode = npar->promisc_mode;
        if (qlcnic_config_switch_port(adapter, &esw_cfg))
                return -EIO;

        esw_cfg.op_mode = QLCNIC_ADD_VLAN;
        if (qlcnic_config_switch_port(adapter, &esw_cfg))
                return -EIO;

        return 0;
}

static int
qlcnic_reset_npar_config(struct qlcnic_adapter *adapter)
{
        int i, err;
        struct qlcnic_npar_info *npar;
        struct qlcnic_info nic_info;

        if (!adapter->need_fw_reset)
                return 0;

        /* Set the NPAR config data after FW reset */
        for (i = 0; i < QLCNIC_MAX_PCI_FUNC; i++) {
                npar = &adapter->npars[i];
                if (npar->type != QLCNIC_TYPE_NIC)
                        continue;
                err = qlcnic_get_nic_info(adapter, &nic_info, i);
                if (err)
                        return err;
                nic_info.min_tx_bw = npar->min_bw;
                nic_info.max_tx_bw = npar->max_bw;
                err = qlcnic_set_nic_info(adapter, &nic_info);
                if (err)
                        return err;

                if (npar->enable_pm) {
                        err = qlcnic_config_port_mirroring(adapter,
                                                        npar->dest_npar, 1, i);
                        if (err)
                                return err;
                }
                err = qlcnic_reset_eswitch_config(adapter, npar, i);
                if (err)
                        return err;
        }
        return 0;
}

static int qlcnic_check_npar_opertional(struct qlcnic_adapter *adapter)
{
        u8 npar_opt_timeo = QLCNIC_DEV_NPAR_OPER_TIMEO;
        u32 npar_state;

        if (adapter->op_mode == QLCNIC_MGMT_FUNC)
                return 0;

        npar_state = QLCRD32(adapter, QLCNIC_CRB_DEV_NPAR_STATE);
        while (npar_state != QLCNIC_DEV_NPAR_OPER && --npar_opt_timeo) {
                msleep(1000);
                npar_state = QLCRD32(adapter, QLCNIC_CRB_DEV_NPAR_STATE);
        }
        if (!npar_opt_timeo) {
                dev_err(&adapter->pdev->dev,
                        "Waiting for NPAR state to opertional timeout\n");
                return -EIO;
        }
        return 0;
}

static int
qlcnic_set_mgmt_operations(struct qlcnic_adapter *adapter)
{
        int err;

        if (!(adapter->flags & QLCNIC_ESWITCH_ENABLED) ||
                    adapter->op_mode != QLCNIC_MGMT_FUNC)
                return 0;

        err = qlcnic_set_default_offload_settings(adapter);
        if (err)
                return err;

        err = qlcnic_reset_npar_config(adapter);
        if (err)
                return err;

        qlcnic_dev_set_npar_ready(adapter);

        return err;
}

static int
qlcnic_start_firmware(struct qlcnic_adapter *adapter)
{
        int err;

        err = qlcnic_can_start_firmware(adapter);
        if (err < 0)
                return err;
        else if (!err)
                goto check_fw_status;

        if (load_fw_file)
                qlcnic_request_firmware(adapter);
        else {
                err = qlcnic_check_flash_fw_ver(adapter);
                if (err)
                        goto err_out;

                adapter->fw_type = QLCNIC_FLASH_ROMIMAGE;
        }

        err = qlcnic_need_fw_reset(adapter);
        if (err == 0)
                goto check_fw_status;

        err = qlcnic_pinit_from_rom(adapter);
        if (err)
                goto err_out;

        err = qlcnic_load_firmware(adapter);
        if (err)
                goto err_out;

        qlcnic_release_firmware(adapter);
        QLCWR32(adapter, CRB_DRIVER_VERSION, QLCNIC_DRIVER_VERSION);

check_fw_status:
        err = qlcnic_check_fw_status(adapter);
        if (err)
                goto err_out;

        QLCWR32(adapter, QLCNIC_CRB_DEV_STATE, QLCNIC_DEV_READY);
        qlcnic_idc_debug_info(adapter, 1);

        err = qlcnic_check_eswitch_mode(adapter);
        if (err) {
                dev_err(&adapter->pdev->dev,
                        "Memory allocation failed for eswitch\n");
                goto err_out;
        }
        err = qlcnic_set_mgmt_operations(adapter);
        if (err)
                goto err_out;

        qlcnic_check_options(adapter);
        adapter->need_fw_reset = 0;

        qlcnic_release_firmware(adapter);
        return 0;

err_out:
        QLCWR32(adapter, QLCNIC_CRB_DEV_STATE, QLCNIC_DEV_FAILED);
        dev_err(&adapter->pdev->dev, "Device state set to failed\n");

        qlcnic_release_firmware(adapter);
        return err;
}

static int
qlcnic_request_irq(struct qlcnic_adapter *adapter)
{
        irq_handler_t handler;
        struct qlcnic_host_sds_ring *sds_ring;
        int err, ring;

        unsigned long flags = 0;
        struct net_device *netdev = adapter->netdev;
        struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;

        if (adapter->diag_test == QLCNIC_INTERRUPT_TEST) {
                handler = qlcnic_tmp_intr;
                if (!QLCNIC_IS_MSI_FAMILY(adapter))
                        flags |= IRQF_SHARED;

        } else {
                if (adapter->flags & QLCNIC_MSIX_ENABLED)
                        handler = qlcnic_msix_intr;
                else if (adapter->flags & QLCNIC_MSI_ENABLED)
                        handler = qlcnic_msi_intr;
                else {
                        flags |= IRQF_SHARED;
                        handler = qlcnic_intr;
                }
        }
        adapter->irq = netdev->irq;

        for (ring = 0; ring < adapter->max_sds_rings; ring++) {
                sds_ring = &recv_ctx->sds_rings[ring];
                sprintf(sds_ring->name, "%s[%d]", netdev->name, ring);
                err = request_irq(sds_ring->irq, handler,
                                  flags, sds_ring->name, sds_ring);
                if (err)
                        return err;
        }

        return 0;
}

static void
qlcnic_free_irq(struct qlcnic_adapter *adapter)
{
        int ring;
        struct qlcnic_host_sds_ring *sds_ring;

        struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;

        for (ring = 0; ring < adapter->max_sds_rings; ring++) {
                sds_ring = &recv_ctx->sds_rings[ring];
                free_irq(sds_ring->irq, sds_ring);
        }
}

static int
__qlcnic_up(struct qlcnic_adapter *adapter, struct net_device *netdev)
{
        int ring;
        struct qlcnic_host_rds_ring *rds_ring;

        if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
                return -EIO;

        if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
                return 0;
        if (qlcnic_set_eswitch_port_config(adapter))
                return -EIO;

        if (qlcnic_fw_create_ctx(adapter))
                return -EIO;

        for (ring = 0; ring < adapter->max_rds_rings; ring++) {
                rds_ring = &adapter->recv_ctx->rds_rings[ring];
                qlcnic_post_rx_buffers(adapter, rds_ring);
        }

        qlcnic_set_multi(netdev);
        qlcnic_fw_cmd_set_mtu(adapter, netdev->mtu);

        adapter->ahw->linkup = 0;

        if (adapter->max_sds_rings > 1)
                qlcnic_config_rss(adapter, 1);

        qlcnic_config_intr_coalesce(adapter);

        if (netdev->features & NETIF_F_LRO)
                qlcnic_config_hw_lro(adapter, QLCNIC_LRO_ENABLED);

        qlcnic_napi_enable(adapter);

        qlcnic_linkevent_request(adapter, 1);

        adapter->reset_context = 0;
        set_bit(__QLCNIC_DEV_UP, &adapter->state);
        return 0;
}

/* Usage: During resume and firmware recovery module.*/

static int
qlcnic_up(struct qlcnic_adapter *adapter, struct net_device *netdev)
{
        int err = 0;

        rtnl_lock();
        if (netif_running(netdev))
                err = __qlcnic_up(adapter, netdev);
        rtnl_unlock();

        return err;
}

static void
__qlcnic_down(struct qlcnic_adapter *adapter, struct net_device *netdev)
{
        if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
                return;

        if (!test_and_clear_bit(__QLCNIC_DEV_UP, &adapter->state))
                return;

        smp_mb();
        spin_lock(&adapter->tx_clean_lock);
        netif_carrier_off(netdev);
        netif_tx_disable(netdev);

        qlcnic_free_mac_list(adapter);

        if (adapter->fhash.fnum)
                qlcnic_delete_lb_filters(adapter);

        qlcnic_nic_set_promisc(adapter, QLCNIC_NIU_NON_PROMISC_MODE);

        qlcnic_napi_disable(adapter);

        qlcnic_fw_destroy_ctx(adapter);

        qlcnic_reset_rx_buffers_list(adapter);
        qlcnic_release_tx_buffers(adapter);
        spin_unlock(&adapter->tx_clean_lock);
}

/* Usage: During suspend and firmware recovery module */

static void
qlcnic_down(struct qlcnic_adapter *adapter, struct net_device *netdev)
{
        rtnl_lock();
        if (netif_running(netdev))
                __qlcnic_down(adapter, netdev);
        rtnl_unlock();

}

static int
qlcnic_attach(struct qlcnic_adapter *adapter)
{
        struct net_device *netdev = adapter->netdev;
        struct pci_dev *pdev = adapter->pdev;
        int err;

        if (adapter->is_up == QLCNIC_ADAPTER_UP_MAGIC)
                return 0;

        err = qlcnic_napi_add(adapter, netdev);
        if (err)
                return err;

        err = qlcnic_alloc_sw_resources(adapter);
        if (err) {
                dev_err(&pdev->dev, "Error in setting sw resources\n");
                goto err_out_napi_del;
        }

        err = qlcnic_alloc_hw_resources(adapter);
        if (err) {
                dev_err(&pdev->dev, "Error in setting hw resources\n");
                goto err_out_free_sw;
        }

        err = qlcnic_request_irq(adapter);
        if (err) {
                dev_err(&pdev->dev, "failed to setup interrupt\n");
                goto err_out_free_hw;
        }

        qlcnic_create_sysfs_entries(adapter);

        adapter->is_up = QLCNIC_ADAPTER_UP_MAGIC;
        return 0;

err_out_free_hw:
        qlcnic_free_hw_resources(adapter);
err_out_free_sw:
        qlcnic_free_sw_resources(adapter);
err_out_napi_del:
        qlcnic_napi_del(adapter);
        return err;
}

static void
qlcnic_detach(struct qlcnic_adapter *adapter)
{
        if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
                return;

        qlcnic_remove_sysfs_entries(adapter);

        qlcnic_free_hw_resources(adapter);
        qlcnic_release_rx_buffers(adapter);
        qlcnic_free_irq(adapter);
        qlcnic_napi_del(adapter);
        qlcnic_free_sw_resources(adapter);

        adapter->is_up = 0;
}

void qlcnic_diag_free_res(struct net_device *netdev, int max_sds_rings)
{
        struct qlcnic_adapter *adapter = netdev_priv(netdev);
        struct qlcnic_host_sds_ring *sds_ring;
        int ring;

        clear_bit(__QLCNIC_DEV_UP, &adapter->state);
        if (adapter->diag_test == QLCNIC_INTERRUPT_TEST) {
                for (ring = 0; ring < adapter->max_sds_rings; ring++) {
                        sds_ring = &adapter->recv_ctx->sds_rings[ring];
                        qlcnic_disable_int(sds_ring);
                }
        }

        qlcnic_fw_destroy_ctx(adapter);

        qlcnic_detach(adapter);

        adapter->diag_test = 0;
        adapter->max_sds_rings = max_sds_rings;

        if (qlcnic_attach(adapter))
                goto out;

        if (netif_running(netdev))
                __qlcnic_up(adapter, netdev);
out:
        netif_device_attach(netdev);
}

static int qlcnic_alloc_adapter_resources(struct qlcnic_adapter *adapter)
{
        int err = 0;
        adapter->ahw = kzalloc(sizeof(struct qlcnic_hardware_context),
                                GFP_KERNEL);
        if (!adapter->ahw) {
                dev_err(&adapter->pdev->dev,
                        "Failed to allocate recv ctx resources for adapter\n");
                err = -ENOMEM;
                goto err_out;
        }
        adapter->recv_ctx = kzalloc(sizeof(struct qlcnic_recv_context),
                                GFP_KERNEL);
        if (!adapter->recv_ctx) {
                dev_err(&adapter->pdev->dev,
                        "Failed to allocate recv ctx resources for adapter\n");
                kfree(adapter->ahw);
                adapter->ahw = NULL;
                err = -ENOMEM;
                goto err_out;
        }
        /* Initialize interrupt coalesce parameters */
        adapter->ahw->coal.flag = QLCNIC_INTR_DEFAULT;
        adapter->ahw->coal.rx_time_us = QLCNIC_DEFAULT_INTR_COALESCE_RX_TIME_US;
        adapter->ahw->coal.rx_packets = QLCNIC_DEFAULT_INTR_COALESCE_RX_PACKETS;
err_out:
        return err;
}

static void qlcnic_free_adapter_resources(struct qlcnic_adapter *adapter)
{
        kfree(adapter->recv_ctx);
        adapter->recv_ctx = NULL;

        if (adapter->ahw->fw_dump.tmpl_hdr) {
                vfree(adapter->ahw->fw_dump.tmpl_hdr);
                adapter->ahw->fw_dump.tmpl_hdr = NULL;
        }
        kfree(adapter->ahw);
        adapter->ahw = NULL;
}

int qlcnic_diag_alloc_res(struct net_device *netdev, int test)
{
        struct qlcnic_adapter *adapter = netdev_priv(netdev);
        struct qlcnic_host_sds_ring *sds_ring;
        struct qlcnic_host_rds_ring *rds_ring;
        int ring;
        int ret;

        netif_device_detach(netdev);

        if (netif_running(netdev))
                __qlcnic_down(adapter, netdev);

        qlcnic_detach(adapter);

        adapter->max_sds_rings = 1;
        adapter->diag_test = test;

        ret = qlcnic_attach(adapter);
        if (ret) {
                netif_device_attach(netdev);
                return ret;
        }

        ret = qlcnic_fw_create_ctx(adapter);
        if (ret) {
                qlcnic_detach(adapter);
                netif_device_attach(netdev);
                return ret;
        }

        for (ring = 0; ring < adapter->max_rds_rings; ring++) {
                rds_ring = &adapter->recv_ctx->rds_rings[ring];
                qlcnic_post_rx_buffers(adapter, rds_ring);
        }

        if (adapter->diag_test == QLCNIC_INTERRUPT_TEST) {
                for (ring = 0; ring < adapter->max_sds_rings; ring++) {
                        sds_ring = &adapter->recv_ctx->sds_rings[ring];
                        qlcnic_enable_int(sds_ring);
                }
        }

        if (adapter->diag_test == QLCNIC_LOOPBACK_TEST) {
                adapter->ahw->loopback_state = 0;
                qlcnic_linkevent_request(adapter, 1);
        }

        set_bit(__QLCNIC_DEV_UP, &adapter->state);

        return 0;
}

/* Reset context in hardware only */
static int
qlcnic_reset_hw_context(struct qlcnic_adapter *adapter)
{
        struct net_device *netdev = adapter->netdev;

        if (test_and_set_bit(__QLCNIC_RESETTING, &adapter->state))
                return -EBUSY;

        netif_device_detach(netdev);

        qlcnic_down(adapter, netdev);

        qlcnic_up(adapter, netdev);

        netif_device_attach(netdev);

        clear_bit(__QLCNIC_RESETTING, &adapter->state);
        return 0;
}

int
qlcnic_reset_context(struct qlcnic_adapter *adapter)
{
        int err = 0;
        struct net_device *netdev = adapter->netdev;

        if (test_and_set_bit(__QLCNIC_RESETTING, &adapter->state))
                return -EBUSY;

        if (adapter->is_up == QLCNIC_ADAPTER_UP_MAGIC) {

                netif_device_detach(netdev);

                if (netif_running(netdev))
                        __qlcnic_down(adapter, netdev);

                qlcnic_detach(adapter);

                if (netif_running(netdev)) {
                        err = qlcnic_attach(adapter);
                        if (!err)
                                __qlcnic_up(adapter, netdev);
                }

                netif_device_attach(netdev);
        }

        clear_bit(__QLCNIC_RESETTING, &adapter->state);
        return err;
}

static int
qlcnic_setup_netdev(struct qlcnic_adapter *adapter,
                struct net_device *netdev, u8 pci_using_dac)
{
        int err;
        struct pci_dev *pdev = adapter->pdev;

        adapter->mc_enabled = 0;
        adapter->max_mc_count = 38;

        netdev->netdev_ops         = &qlcnic_netdev_ops;
        netdev->watchdog_timeo     = 5*HZ;

        qlcnic_change_mtu(netdev, netdev->mtu);

        SET_ETHTOOL_OPS(netdev, &qlcnic_ethtool_ops);

        netdev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM |
                NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM;

        if (adapter->capabilities & QLCNIC_FW_CAPABILITY_TSO)
                netdev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6;
        if (pci_using_dac)
                netdev->hw_features |= NETIF_F_HIGHDMA;

        netdev->vlan_features = netdev->hw_features;

        if (adapter->capabilities & QLCNIC_FW_CAPABILITY_FVLANTX)
                netdev->hw_features |= NETIF_F_HW_VLAN_TX;
        if (adapter->capabilities & QLCNIC_FW_CAPABILITY_HW_LRO)
                netdev->hw_features |= NETIF_F_LRO;

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

        netdev->irq = adapter->msix_entries[0].vector;

        err = register_netdev(netdev);
        if (err) {
                dev_err(&pdev->dev, "failed to register net device\n");
                return err;
        }

        return 0;
}

static int qlcnic_set_dma_mask(struct pci_dev *pdev, u8 *pci_using_dac)
{
        if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) &&
                        !pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)))
                *pci_using_dac = 1;
        else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) &&
                        !pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)))
                *pci_using_dac = 0;
        else {
                dev_err(&pdev->dev, "Unable to set DMA mask, aborting\n");
                return -EIO;
        }

        return 0;
}

static int
qlcnic_alloc_msix_entries(struct qlcnic_adapter *adapter, u16 count)
{
        adapter->msix_entries = kcalloc(count, sizeof(struct msix_entry),
                                        GFP_KERNEL);

        if (adapter->msix_entries)
                return 0;

        dev_err(&adapter->pdev->dev, "failed allocating msix_entries\n");
        return -ENOMEM;
}

static int __devinit
qlcnic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
        struct net_device *netdev = NULL;
        struct qlcnic_adapter *adapter = NULL;
        int err;
        uint8_t revision_id;
        uint8_t pci_using_dac;
        char brd_name[QLCNIC_MAX_BOARD_NAME_LEN];

        err = pci_enable_device(pdev);
        if (err)
                return err;

        if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
                err = -ENODEV;
                goto err_out_disable_pdev;
        }

        err = qlcnic_set_dma_mask(pdev, &pci_using_dac);
        if (err)
                goto err_out_disable_pdev;

        err = pci_request_regions(pdev, qlcnic_driver_name);
        if (err)
                goto err_out_disable_pdev;

        pci_set_master(pdev);
        pci_enable_pcie_error_reporting(pdev);

        netdev = alloc_etherdev(sizeof(struct qlcnic_adapter));
        if (!netdev) {
                dev_err(&pdev->dev, "failed to allocate net_device\n");
                err = -ENOMEM;
                goto err_out_free_res;
        }

        SET_NETDEV_DEV(netdev, &pdev->dev);

        adapter = netdev_priv(netdev);
        adapter->netdev  = netdev;
        adapter->pdev    = pdev;

        if (qlcnic_alloc_adapter_resources(adapter))
                goto err_out_free_netdev;

        adapter->dev_rst_time = jiffies;
        revision_id = pdev->revision;
        adapter->ahw->revision_id = revision_id;
        adapter->mac_learn = qlcnic_mac_learn;

        rwlock_init(&adapter->ahw->crb_lock);
        mutex_init(&adapter->ahw->mem_lock);

        spin_lock_init(&adapter->tx_clean_lock);
        INIT_LIST_HEAD(&adapter->mac_list);

        err = qlcnic_setup_pci_map(adapter);
        if (err)
                goto err_out_free_hw;

        /* This will be reset for mezz cards  */
        adapter->portnum = adapter->ahw->pci_func;

        err = qlcnic_get_board_info(adapter);
        if (err) {
                dev_err(&pdev->dev, "Error getting board config info.\n");
                goto err_out_iounmap;
        }

        err = qlcnic_setup_idc_param(adapter);
        if (err)
                goto err_out_iounmap;

        adapter->flags |= QLCNIC_NEED_FLR;

        err = adapter->nic_ops->start_firmware(adapter);
        if (err) {
                dev_err(&pdev->dev, "Loading fw failed.Please Reboot\n");
                goto err_out_decr_ref;
        }

        if (qlcnic_read_mac_addr(adapter))
                dev_warn(&pdev->dev, "failed to read mac addr\n");

        if (adapter->portnum == 0) {
                get_brd_name(adapter, brd_name);

                pr_info("%s: %s Board Chip rev 0x%x\n",
                                module_name(THIS_MODULE),
                                brd_name, adapter->ahw->revision_id);
        }

        qlcnic_clear_stats(adapter);

        err = qlcnic_alloc_msix_entries(adapter, adapter->max_rx_ques);
        if (err)
                goto err_out_decr_ref;

        qlcnic_setup_intr(adapter);

        err = qlcnic_setup_netdev(adapter, netdev, pci_using_dac);
        if (err)
                goto err_out_disable_msi;

        pci_set_drvdata(pdev, adapter);

        qlcnic_schedule_work(adapter, qlcnic_fw_poll_work, FW_POLL_DELAY);

        switch (adapter->ahw->port_type) {
        case QLCNIC_GBE:
                dev_info(&adapter->pdev->dev, "%s: GbE port initialized\n",
                                adapter->netdev->name);
                break;
        case QLCNIC_XGBE:
                dev_info(&adapter->pdev->dev, "%s: XGbE port initialized\n",
                                adapter->netdev->name);
                break;
        }

        if (adapter->mac_learn)
                qlcnic_alloc_lb_filters_mem(adapter);

        qlcnic_create_diag_entries(adapter);

        return 0;

err_out_disable_msi:
        qlcnic_teardown_intr(adapter);
        kfree(adapter->msix_entries);

err_out_decr_ref:
        qlcnic_clr_all_drv_state(adapter, 0);

err_out_iounmap:
        qlcnic_cleanup_pci_map(adapter);

err_out_free_hw:
        qlcnic_free_adapter_resources(adapter);

err_out_free_netdev:
        free_netdev(netdev);

err_out_free_res:
        pci_release_regions(pdev);

err_out_disable_pdev:
        pci_set_drvdata(pdev, NULL);
        pci_disable_device(pdev);
        return err;
}

static void __devexit qlcnic_remove(struct pci_dev *pdev)
{
        struct qlcnic_adapter *adapter;
        struct net_device *netdev;

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

        netdev = adapter->netdev;

        qlcnic_cancel_fw_work(adapter);

        unregister_netdev(netdev);

        qlcnic_detach(adapter);

        if (adapter->npars != NULL)
                kfree(adapter->npars);
        if (adapter->eswitch != NULL)
                kfree(adapter->eswitch);

        qlcnic_clr_all_drv_state(adapter, 0);

        clear_bit(__QLCNIC_RESETTING, &adapter->state);

        qlcnic_free_lb_filters_mem(adapter);

        qlcnic_teardown_intr(adapter);
        kfree(adapter->msix_entries);

        qlcnic_remove_diag_entries(adapter);

        qlcnic_cleanup_pci_map(adapter);

        qlcnic_release_firmware(adapter);

        pci_disable_pcie_error_reporting(pdev);
        pci_release_regions(pdev);
        pci_disable_device(pdev);
        pci_set_drvdata(pdev, NULL);

        qlcnic_free_adapter_resources(adapter);
        free_netdev(netdev);
}
static int __qlcnic_shutdown(struct pci_dev *pdev)
{
        struct qlcnic_adapter *adapter = pci_get_drvdata(pdev);
        struct net_device *netdev = adapter->netdev;
        int retval;

        netif_device_detach(netdev);

        qlcnic_cancel_fw_work(adapter);

        if (netif_running(netdev))
                qlcnic_down(adapter, netdev);

        qlcnic_clr_all_drv_state(adapter, 0);

        clear_bit(__QLCNIC_RESETTING, &adapter->state);

        retval = pci_save_state(pdev);
        if (retval)
                return retval;

        if (qlcnic_wol_supported(adapter)) {
                pci_enable_wake(pdev, PCI_D3cold, 1);
                pci_enable_wake(pdev, PCI_D3hot, 1);
        }

        return 0;
}

static void qlcnic_shutdown(struct pci_dev *pdev)
{
        if (__qlcnic_shutdown(pdev))
                return;

        pci_disable_device(pdev);
}

#ifdef CONFIG_PM
static int
qlcnic_suspend(struct pci_dev *pdev, pm_message_t state)
{
        int retval;

        retval = __qlcnic_shutdown(pdev);
        if (retval)
                return retval;

        pci_set_power_state(pdev, pci_choose_state(pdev, state));
        return 0;
}

static int
qlcnic_resume(struct pci_dev *pdev)
{
        struct qlcnic_adapter *adapter = pci_get_drvdata(pdev);
        struct net_device *netdev = adapter->netdev;
        int err;

        err = pci_enable_device(pdev);
        if (err)
                return err;

        pci_set_power_state(pdev, PCI_D0);
        pci_set_master(pdev);
        pci_restore_state(pdev);

        err = adapter->nic_ops->start_firmware(adapter);
        if (err) {
                dev_err(&pdev->dev, "failed to start firmware\n");
                return err;
        }

        if (netif_running(netdev)) {
                err = qlcnic_up(adapter, netdev);
                if (err)
                        goto done;

                qlcnic_restore_indev_addr(netdev, NETDEV_UP);
        }
done:
        netif_device_attach(netdev);
        qlcnic_schedule_work(adapter, qlcnic_fw_poll_work, FW_POLL_DELAY);
        return 0;
}
#endif

static int qlcnic_open(struct net_device *netdev)
{
        struct qlcnic_adapter *adapter = netdev_priv(netdev);
        int err;

        netif_carrier_off(netdev);

        err = qlcnic_attach(adapter);
        if (err)
                return err;

        err = __qlcnic_up(adapter, netdev);
        if (err)
                goto err_out;

        netif_start_queue(netdev);

        return 0;

err_out:
        qlcnic_detach(adapter);
        return err;
}

/*
 * qlcnic_close - Disables a network interface entry point
 */
static int qlcnic_close(struct net_device *netdev)
{
        struct qlcnic_adapter *adapter = netdev_priv(netdev);

        __qlcnic_down(adapter, netdev);
        return 0;
}

void qlcnic_alloc_lb_filters_mem(struct qlcnic_adapter *adapter)
{
        void *head;
        int i;

        if (adapter->fhash.fmax && adapter->fhash.fhead)
                return;

        spin_lock_init(&adapter->mac_learn_lock);

        head = kcalloc(QLCNIC_LB_MAX_FILTERS, sizeof(struct hlist_head),
                                                                GFP_KERNEL);
        if (!head)
                return;

        adapter->fhash.fmax = QLCNIC_LB_MAX_FILTERS;
        adapter->fhash.fhead = head;

        for (i = 0; i < adapter->fhash.fmax; i++)
                INIT_HLIST_HEAD(&adapter->fhash.fhead[i]);
}

static void qlcnic_free_lb_filters_mem(struct qlcnic_adapter *adapter)
{
        if (adapter->fhash.fmax && adapter->fhash.fhead)
                kfree(adapter->fhash.fhead);

        adapter->fhash.fhead = NULL;
        adapter->fhash.fmax = 0;
}

static void qlcnic_change_filter(struct qlcnic_adapter *adapter,
                u64 uaddr, __le16 vlan_id, struct qlcnic_host_tx_ring *tx_ring)
{
        struct cmd_desc_type0 *hwdesc;
        struct qlcnic_nic_req *req;
        struct qlcnic_mac_req *mac_req;
        struct qlcnic_vlan_req *vlan_req;
        u32 producer;
        u64 word;

        producer = tx_ring->producer;
        hwdesc = &tx_ring->desc_head[tx_ring->producer];

        req = (struct qlcnic_nic_req *)hwdesc;
        memset(req, 0, sizeof(struct qlcnic_nic_req));
        req->qhdr = cpu_to_le64(QLCNIC_REQUEST << 23);

        word = QLCNIC_MAC_EVENT | ((u64)(adapter->portnum) << 16);
        req->req_hdr = cpu_to_le64(word);

        mac_req = (struct qlcnic_mac_req *)&(req->words[0]);
        mac_req->op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD;
        memcpy(mac_req->mac_addr, &uaddr, ETH_ALEN);

        vlan_req = (struct qlcnic_vlan_req *)&req->words[1];
        vlan_req->vlan_id = vlan_id;

        tx_ring->producer = get_next_index(producer, tx_ring->num_desc);
        smp_mb();
}

#define QLCNIC_MAC_HASH(MAC)\
        ((((MAC) & 0x70000) >> 0x10) | (((MAC) & 0x70000000000ULL) >> 0x25))

static void
qlcnic_send_filter(struct qlcnic_adapter *adapter,
                struct qlcnic_host_tx_ring *tx_ring,
                struct cmd_desc_type0 *first_desc,
                struct sk_buff *skb)
{
        struct ethhdr *phdr = (struct ethhdr *)(skb->data);
        struct qlcnic_filter *fil, *tmp_fil;
        struct hlist_node *tmp_hnode, *n;
        struct hlist_head *head;
        u64 src_addr = 0;
        __le16 vlan_id = 0;
        u8 hindex;

        if (!compare_ether_addr(phdr->h_source, adapter->mac_addr))
                return;

        if (adapter->fhash.fnum >= adapter->fhash.fmax)
                return;

        /* Only NPAR capable devices support vlan based learning*/
        if (adapter->flags & QLCNIC_ESWITCH_ENABLED)
                vlan_id = first_desc->vlan_TCI;
        memcpy(&src_addr, phdr->h_source, ETH_ALEN);
        hindex = QLCNIC_MAC_HASH(src_addr) & (QLCNIC_LB_MAX_FILTERS - 1);
        head = &(adapter->fhash.fhead[hindex]);

        hlist_for_each_entry_safe(tmp_fil, tmp_hnode, n, head, fnode) {
                if (!memcmp(tmp_fil->faddr, &src_addr, ETH_ALEN) &&
                            tmp_fil->vlan_id == vlan_id) {

                        if (jiffies >
                            (QLCNIC_READD_AGE * HZ + tmp_fil->ftime))
                                qlcnic_change_filter(adapter, src_addr, vlan_id,
                                                                tx_ring);
                        tmp_fil->ftime = jiffies;
                        return;
                }
        }

        fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC);
        if (!fil)
                return;

        qlcnic_change_filter(adapter, src_addr, vlan_id, tx_ring);

        fil->ftime = jiffies;
        fil->vlan_id = vlan_id;
        memcpy(fil->faddr, &src_addr, ETH_ALEN);
        spin_lock(&adapter->mac_learn_lock);
        hlist_add_head(&(fil->fnode), head);
        adapter->fhash.fnum++;
        spin_unlock(&adapter->mac_learn_lock);
}

static int
qlcnic_tx_pkt(struct qlcnic_adapter *adapter,
                struct cmd_desc_type0 *first_desc,
                struct sk_buff *skb)
{
        u8 opcode = 0, hdr_len = 0;
        u16 flags = 0, vlan_tci = 0;
        int copied, offset, copy_len;
        struct cmd_desc_type0 *hwdesc;
        struct vlan_ethhdr *vh;
        struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring;
        u16 protocol = ntohs(skb->protocol);
        u32 producer = tx_ring->producer;

        if (protocol == ETH_P_8021Q) {
                vh = (struct vlan_ethhdr *)skb->data;
                flags = FLAGS_VLAN_TAGGED;
                vlan_tci = vh->h_vlan_TCI;

        } else if (vlan_tx_tag_present(skb)) {
                flags = FLAGS_VLAN_OOB;
                vlan_tci = vlan_tx_tag_get(skb);
        }
        if (unlikely(adapter->pvid)) {
                if (vlan_tci && !(adapter->flags & QLCNIC_TAGGING_ENABLED))
                        return -EIO;
                if (vlan_tci && (adapter->flags & QLCNIC_TAGGING_ENABLED))
                        goto set_flags;

                flags = FLAGS_VLAN_OOB;
                vlan_tci = adapter->pvid;
        }
set_flags:
        qlcnic_set_tx_vlan_tci(first_desc, vlan_tci);
        qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);

        if (*(skb->data) & BIT_0) {
                flags |= BIT_0;
                memcpy(&first_desc->eth_addr, skb->data, ETH_ALEN);
        }
        opcode = TX_ETHER_PKT;
        if ((adapter->netdev->features & (NETIF_F_TSO | NETIF_F_TSO6)) &&
                        skb_shinfo(skb)->gso_size > 0) {

                hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);

                first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
                first_desc->total_hdr_length = hdr_len;

                opcode = (protocol == ETH_P_IPV6) ? TX_TCP_LSO6 : TX_TCP_LSO;

                /* For LSO, we need to copy the MAC/IP/TCP headers into
                * the descriptor ring */
                copied = 0;
                offset = 2;

                if (flags & FLAGS_VLAN_OOB) {
                        first_desc->total_hdr_length += VLAN_HLEN;
                        first_desc->tcp_hdr_offset = VLAN_HLEN;
                        first_desc->ip_hdr_offset = VLAN_HLEN;
                        /* Only in case of TSO on vlan device */
                        flags |= FLAGS_VLAN_TAGGED;

                        /* Create a TSO vlan header template for firmware */

                        hwdesc = &tx_ring->desc_head[producer];
                        tx_ring->cmd_buf_arr[producer].skb = NULL;

                        copy_len = min((int)sizeof(struct cmd_desc_type0) -
                                offset, hdr_len + VLAN_HLEN);

                        vh = (struct vlan_ethhdr *)((char *) hwdesc + 2);
                        skb_copy_from_linear_data(skb, vh, 12);
                        vh->h_vlan_proto = htons(ETH_P_8021Q);
                        vh->h_vlan_TCI = htons(vlan_tci);

                        skb_copy_from_linear_data_offset(skb, 12,
                                (char *)vh + 16, copy_len - 16);

                        copied = copy_len - VLAN_HLEN;
                        offset = 0;

                        producer = get_next_index(producer, tx_ring->num_desc);
                }

                while (copied < hdr_len) {

                        copy_len = min((int)sizeof(struct cmd_desc_type0) -
                                offset, (hdr_len - copied));

                        hwdesc = &tx_ring->desc_head[producer];
                        tx_ring->cmd_buf_arr[producer].skb = NULL;

                        skb_copy_from_linear_data_offset(skb, copied,
                                 (char *) hwdesc + offset, copy_len);

                        copied += copy_len;
                        offset = 0;

                        producer = get_next_index(producer, tx_ring->num_desc);
                }

                tx_ring->producer = producer;
                smp_mb();
                adapter->stats.lso_frames++;

        } else if (skb->ip_summed == CHECKSUM_PARTIAL) {
                u8 l4proto;

                if (protocol == ETH_P_IP) {
                        l4proto = ip_hdr(skb)->protocol;

                        if (l4proto == IPPROTO_TCP)
                                opcode = TX_TCP_PKT;
                        else if (l4proto == IPPROTO_UDP)
                                opcode = TX_UDP_PKT;
                } else if (protocol == ETH_P_IPV6) {
                        l4proto = ipv6_hdr(skb)->nexthdr;

                        if (l4proto == IPPROTO_TCP)
                                opcode = TX_TCPV6_PKT;
                        else if (l4proto == IPPROTO_UDP)
                                opcode = TX_UDPV6_PKT;
                }
        }
        first_desc->tcp_hdr_offset += skb_transport_offset(skb);
        first_desc->ip_hdr_offset += skb_network_offset(skb);
        qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);

        return 0;
}

static int
qlcnic_map_tx_skb(struct pci_dev *pdev,
                struct sk_buff *skb, struct qlcnic_cmd_buffer *pbuf)
{
        struct qlcnic_skb_frag *nf;
        struct skb_frag_struct *frag;
        int i, nr_frags;
        dma_addr_t map;

        nr_frags = skb_shinfo(skb)->nr_frags;
        nf = &pbuf->frag_array[0];

        map = pci_map_single(pdev, skb->data,
                        skb_headlen(skb), PCI_DMA_TODEVICE);
        if (pci_dma_mapping_error(pdev, map))
                goto out_err;

        nf->dma = map;
        nf->length = skb_headlen(skb);

        for (i = 0; i < nr_frags; i++) {
                frag = &skb_shinfo(skb)->frags[i];
                nf = &pbuf->frag_array[i+1];

                map = skb_frag_dma_map(&pdev->dev, frag, 0, skb_frag_size(frag),
                                       DMA_TO_DEVICE);
                if (dma_mapping_error(&pdev->dev, map))
                        goto unwind;

                nf->dma = map;
                nf->length = skb_frag_size(frag);
        }

        return 0;

unwind:
        while (--i >= 0) {
                nf = &pbuf->frag_array[i+1];
                pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE);
        }

        nf = &pbuf->frag_array[0];
        pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE);

out_err:
        return -ENOMEM;
}

static void
qlcnic_unmap_buffers(struct pci_dev *pdev, struct sk_buff *skb,
                        struct qlcnic_cmd_buffer *pbuf)
{
        struct qlcnic_skb_frag *nf = &pbuf->frag_array[0];
        int nr_frags = skb_shinfo(skb)->nr_frags;
        int i;

        for (i = 0; i < nr_frags; i++) {
                nf = &pbuf->frag_array[i+1];
                pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE);
        }

        nf = &pbuf->frag_array[0];
        pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE);
        pbuf->skb = NULL;
}

static inline void
qlcnic_clear_cmddesc(u64 *desc)
{
        desc[0] = 0ULL;
        desc[2] = 0ULL;
        desc[7] = 0ULL;
}

netdev_tx_t
qlcnic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
{
        struct qlcnic_adapter *adapter = netdev_priv(netdev);
        struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring;
        struct qlcnic_cmd_buffer *pbuf;
        struct qlcnic_skb_frag *buffrag;
        struct cmd_desc_type0 *hwdesc, *first_desc;
        struct pci_dev *pdev;
        struct ethhdr *phdr;
        int delta = 0;
        int i, k;

        u32 producer;
        int frag_count;
        u32 num_txd = tx_ring->num_desc;

        if (!test_bit(__QLCNIC_DEV_UP, &adapter->state)) {
                netif_stop_queue(netdev);
                return NETDEV_TX_BUSY;
        }

        if (adapter->flags & QLCNIC_MACSPOOF) {
                phdr = (struct ethhdr *)skb->data;
                if (compare_ether_addr(phdr->h_source,
                                        adapter->mac_addr))
                        goto drop_packet;
        }

        frag_count = skb_shinfo(skb)->nr_frags + 1;
        /* 14 frags supported for normal packet and
         * 32 frags supported for TSO packet
         */
        if (!skb_is_gso(skb) && frag_count > QLCNIC_MAX_FRAGS_PER_TX) {

                for (i = 0; i < (frag_count - QLCNIC_MAX_FRAGS_PER_TX); i++)
                        delta += skb_frag_size(&skb_shinfo(skb)->frags[i]);

                if (!__pskb_pull_tail(skb, delta))
                        goto drop_packet;

                frag_count = 1 + skb_shinfo(skb)->nr_frags;
        }

        if (unlikely(qlcnic_tx_avail(tx_ring) <= TX_STOP_THRESH)) {
                netif_stop_queue(netdev);
                if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH)
                        netif_start_queue(netdev);
                else {
                        adapter->stats.xmit_off++;
                        return NETDEV_TX_BUSY;
                }
        }

        producer = tx_ring->producer;
        pbuf = &tx_ring->cmd_buf_arr[producer];

        pdev = adapter->pdev;

        first_desc = hwdesc = &tx_ring->desc_head[producer];
        qlcnic_clear_cmddesc((u64 *)hwdesc);

        if (qlcnic_map_tx_skb(pdev, skb, pbuf)) {
                adapter->stats.tx_dma_map_error++;
                goto drop_packet;
        }

        pbuf->skb = skb;
        pbuf->frag_count = frag_count;

        qlcnic_set_tx_frags_len(first_desc, frag_count, skb->len);
        qlcnic_set_tx_port(first_desc, adapter->portnum);

        for (i = 0; i < frag_count; i++) {

                k = i % 4;

                if ((k == 0) && (i > 0)) {
                        /* move to next desc.*/
                        producer = get_next_index(producer, num_txd);
                        hwdesc = &tx_ring->desc_head[producer];
                        qlcnic_clear_cmddesc((u64 *)hwdesc);
                        tx_ring->cmd_buf_arr[producer].skb = NULL;
                }

                buffrag = &pbuf->frag_array[i];

                hwdesc->buffer_length[k] = cpu_to_le16(buffrag->length);
                switch (k) {
                case 0:
                        hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
                        break;
                case 1:
                        hwdesc->addr_buffer2 = cpu_to_le64(buffrag->dma);
                        break;
                case 2:
                        hwdesc->addr_buffer3 = cpu_to_le64(buffrag->dma);
                        break;
                case 3:
                        hwdesc->addr_buffer4 = cpu_to_le64(buffrag->dma);
                        break;
                }
        }

        tx_ring->producer = get_next_index(producer, num_txd);
        smp_mb();

        if (unlikely(qlcnic_tx_pkt(adapter, first_desc, skb)))
                goto unwind_buff;

        if (adapter->mac_learn)
                qlcnic_send_filter(adapter, tx_ring, first_desc, skb);

        adapter->stats.txbytes += skb->len;
        adapter->stats.xmitcalled++;

        qlcnic_update_cmd_producer(adapter, tx_ring);

        return NETDEV_TX_OK;

unwind_buff:
        qlcnic_unmap_buffers(pdev, skb, pbuf);
drop_packet:
        adapter->stats.txdropped++;
        dev_kfree_skb_any(skb);
        return NETDEV_TX_OK;
}

static int qlcnic_check_temp(struct qlcnic_adapter *adapter)
{
        struct net_device *netdev = adapter->netdev;
        u32 temp, temp_state, temp_val;
        int rv = 0;

        temp = QLCRD32(adapter, CRB_TEMP_STATE);

        temp_state = qlcnic_get_temp_state(temp);
        temp_val = qlcnic_get_temp_val(temp);

        if (temp_state == QLCNIC_TEMP_PANIC) {
                dev_err(&netdev->dev,
                       "Device temperature %d degrees C exceeds"
                       " maximum allowed. Hardware has been shut down.\n",
                       temp_val);
                rv = 1;
        } else if (temp_state == QLCNIC_TEMP_WARN) {
                if (adapter->temp == QLCNIC_TEMP_NORMAL) {
                        dev_err(&netdev->dev,
                               "Device temperature %d degrees C "
                               "exceeds operating range."
                               " Immediate action needed.\n",
                               temp_val);
                }
        } else {
                if (adapter->temp == QLCNIC_TEMP_WARN) {
                        dev_info(&netdev->dev,
                               "Device temperature is now %d degrees C"
                               " in normal range.\n", temp_val);
                }
        }
        adapter->temp = temp_state;
        return rv;
}

void qlcnic_advert_link_change(struct qlcnic_adapter *adapter, int linkup)
{
        struct net_device *netdev = adapter->netdev;

        if (adapter->ahw->linkup && !linkup) {
                netdev_info(netdev, "NIC Link is down\n");
                adapter->ahw->linkup = 0;
                if (netif_running(netdev)) {
                        netif_carrier_off(netdev);
                        netif_stop_queue(netdev);
                }
        } else if (!adapter->ahw->linkup && linkup) {
                netdev_info(netdev, "NIC Link is up\n");
                adapter->ahw->linkup = 1;
                if (netif_running(netdev)) {
                        netif_carrier_on(netdev);
                        netif_wake_queue(netdev);
                }
        }
}

static void qlcnic_tx_timeout(struct net_device *netdev)
{
        struct qlcnic_adapter *adapter = netdev_priv(netdev);

        if (test_bit(__QLCNIC_RESETTING, &adapter->state))
                return;

        dev_err(&netdev->dev, "transmit timeout, resetting.\n");

        if (++adapter->tx_timeo_cnt >= QLCNIC_MAX_TX_TIMEOUTS)
                adapter->need_fw_reset = 1;
        else
                adapter->reset_context = 1;
}

static struct net_device_stats *qlcnic_get_stats(struct net_device *netdev)
{
        struct qlcnic_adapter *adapter = netdev_priv(netdev);
        struct net_device_stats *stats = &netdev->stats;

        stats->rx_packets = adapter->stats.rx_pkts + adapter->stats.lro_pkts;
        stats->tx_packets = adapter->stats.xmitfinished;
        stats->rx_bytes = adapter->stats.rxbytes + adapter->stats.lrobytes;
        stats->tx_bytes = adapter->stats.txbytes;
        stats->rx_dropped = adapter->stats.rxdropped;
        stats->tx_dropped = adapter->stats.txdropped;

        return stats;
}

static irqreturn_t qlcnic_clear_legacy_intr(struct qlcnic_adapter *adapter)
{
        u32 status;

        status = readl(adapter->isr_int_vec);

        if (!(status & adapter->int_vec_bit))
                return IRQ_NONE;

        /* check interrupt state machine, to be sure */
        status = readl(adapter->crb_int_state_reg);
        if (!ISR_LEGACY_INT_TRIGGERED(status))
                return IRQ_NONE;

        writel(0xffffffff, adapter->tgt_status_reg);
        /* read twice to ensure write is flushed */
        readl(adapter->isr_int_vec);
        readl(adapter->isr_int_vec);

        return IRQ_HANDLED;
}

static irqreturn_t qlcnic_tmp_intr(int irq, void *data)
{
        struct qlcnic_host_sds_ring *sds_ring = data;
        struct qlcnic_adapter *adapter = sds_ring->adapter;

        if (adapter->flags & QLCNIC_MSIX_ENABLED)
                goto done;
        else if (adapter->flags & QLCNIC_MSI_ENABLED) {
                writel(0xffffffff, adapter->tgt_status_reg);
                goto done;
        }

        if (qlcnic_clear_legacy_intr(adapter) == IRQ_NONE)
                return IRQ_NONE;

done:
        adapter->diag_cnt++;
        qlcnic_enable_int(sds_ring);
        return IRQ_HANDLED;
}

static irqreturn_t qlcnic_intr(int irq, void *data)
{
        struct qlcnic_host_sds_ring *sds_ring = data;
        struct qlcnic_adapter *adapter = sds_ring->adapter;

        if (qlcnic_clear_legacy_intr(adapter) == IRQ_NONE)
                return IRQ_NONE;

        napi_schedule(&sds_ring->napi);

        return IRQ_HANDLED;
}

static irqreturn_t qlcnic_msi_intr(int irq, void *data)
{
        struct qlcnic_host_sds_ring *sds_ring = data;
        struct qlcnic_adapter *adapter = sds_ring->adapter;

        /* clear interrupt */
        writel(0xffffffff, adapter->tgt_status_reg);

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

static irqreturn_t qlcnic_msix_intr(int irq, void *data)
{
        struct qlcnic_host_sds_ring *sds_ring = data;

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

static int qlcnic_process_cmd_ring(struct qlcnic_adapter *adapter)
{
        u32 sw_consumer, hw_consumer;
        int count = 0, i;
        struct qlcnic_cmd_buffer *buffer;
        struct pci_dev *pdev = adapter->pdev;
        struct net_device *netdev = adapter->netdev;
        struct qlcnic_skb_frag *frag;
        int done;
        struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring;

        if (!spin_trylock(&adapter->tx_clean_lock))
                return 1;

        sw_consumer = tx_ring->sw_consumer;
        hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));

        while (sw_consumer != hw_consumer) {
                buffer = &tx_ring->cmd_buf_arr[sw_consumer];
                if (buffer->skb) {
                        frag = &buffer->frag_array[0];
                        pci_unmap_single(pdev, frag->dma, frag->length,
                                         PCI_DMA_TODEVICE);
                        frag->dma = 0ULL;
                        for (i = 1; i < buffer->frag_count; i++) {
                                frag++;
                                pci_unmap_page(pdev, frag->dma, frag->length,
                                               PCI_DMA_TODEVICE);
                                frag->dma = 0ULL;
                        }

                        adapter->stats.xmitfinished++;
                        dev_kfree_skb_any(buffer->skb);
                        buffer->skb = NULL;
                }

                sw_consumer = get_next_index(sw_consumer, tx_ring->num_desc);
                if (++count >= MAX_STATUS_HANDLE)
                        break;
        }

        if (count && netif_running(netdev)) {
                tx_ring->sw_consumer = sw_consumer;

                smp_mb();

                if (netif_queue_stopped(netdev) && netif_carrier_ok(netdev)) {
                        if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) {
                                netif_wake_queue(netdev);
                                adapter->stats.xmit_on++;
                        }
                }
                adapter->tx_timeo_cnt = 0;
        }
        /*
         * If everything is freed up to consumer then check if the ring is full
         * If the ring is full then check if more needs to be freed and
         * schedule the call back again.
         *
         * This happens when there are 2 CPUs. One could be freeing and the
         * other filling it. If the ring is full when we get out of here and
         * the card has already interrupted the host then the host can miss the
         * interrupt.
         *
         * There is still a possible race condition and the host could miss an
         * interrupt. The card has to take care of this.
         */
        hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
        done = (sw_consumer == hw_consumer);
        spin_unlock(&adapter->tx_clean_lock);

        return done;
}

static int qlcnic_poll(struct napi_struct *napi, int budget)
{
        struct qlcnic_host_sds_ring *sds_ring =
                container_of(napi, struct qlcnic_host_sds_ring, napi);

        struct qlcnic_adapter *adapter = sds_ring->adapter;

        int tx_complete;
        int work_done;

        tx_complete = qlcnic_process_cmd_ring(adapter);

        work_done = qlcnic_process_rcv_ring(sds_ring, budget);

        if ((work_done < budget) && tx_complete) {
                napi_complete(&sds_ring->napi);
                if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
                        qlcnic_enable_int(sds_ring);
        }

        return work_done;
}

static int qlcnic_rx_poll(struct napi_struct *napi, int budget)
{
        struct qlcnic_host_sds_ring *sds_ring =
                container_of(napi, struct qlcnic_host_sds_ring, napi);

        struct qlcnic_adapter *adapter = sds_ring->adapter;
        int work_done;

        work_done = qlcnic_process_rcv_ring(sds_ring, budget);

        if (work_done < budget) {
                napi_complete(&sds_ring->napi);
                if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
                        qlcnic_enable_int(sds_ring);
        }

        return work_done;
}

#ifdef CONFIG_NET_POLL_CONTROLLER
static void qlcnic_poll_controller(struct net_device *netdev)
{
        int ring;
        struct qlcnic_host_sds_ring *sds_ring;
        struct qlcnic_adapter *adapter = netdev_priv(netdev);
        struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;

        disable_irq(adapter->irq);
        for (ring = 0; ring < adapter->max_sds_rings; ring++) {
                sds_ring = &recv_ctx->sds_rings[ring];
                qlcnic_intr(adapter->irq, sds_ring);
        }
        enable_irq(adapter->irq);
}
#endif

static void
qlcnic_idc_debug_info(struct qlcnic_adapter *adapter, u8 encoding)
{
        u32 val;

        val = adapter->portnum & 0xf;
        val |= encoding << 7;
        val |= (jiffies - adapter->dev_rst_time) << 8;

        QLCWR32(adapter, QLCNIC_CRB_DRV_SCRATCH, val);
        adapter->dev_rst_time = jiffies;
}

static int
qlcnic_set_drv_state(struct qlcnic_adapter *adapter, u8 state)
{
        u32  val;

        WARN_ON(state != QLCNIC_DEV_NEED_RESET &&
                        state != QLCNIC_DEV_NEED_QUISCENT);

        if (qlcnic_api_lock(adapter))
                return -EIO;

        val = QLCRD32(adapter, QLCNIC_CRB_DRV_STATE);

        if (state == QLCNIC_DEV_NEED_RESET)
                QLC_DEV_SET_RST_RDY(val, adapter->portnum);
        else if (state == QLCNIC_DEV_NEED_QUISCENT)
                QLC_DEV_SET_QSCNT_RDY(val, adapter->portnum);

        QLCWR32(adapter, QLCNIC_CRB_DRV_STATE, val);

        qlcnic_api_unlock(adapter);

        return 0;
}

static int
qlcnic_clr_drv_state(struct qlcnic_adapter *adapter)
{
        u32  val;

        if (qlcnic_api_lock(adapter))
                return -EBUSY;

        val = QLCRD32(adapter, QLCNIC_CRB_DRV_STATE);
        QLC_DEV_CLR_RST_QSCNT(val, adapter->portnum);
        QLCWR32(adapter, QLCNIC_CRB_DRV_STATE, val);

        qlcnic_api_unlock(adapter);

        return 0;
}

static void
qlcnic_clr_all_drv_state(struct qlcnic_adapter *adapter, u8 failed)
{
        u32  val;

        if (qlcnic_api_lock(adapter))
                goto err;

        val = QLCRD32(adapter, QLCNIC_CRB_DRV_ACTIVE);
        QLC_DEV_CLR_REF_CNT(val, adapter->portnum);
        QLCWR32(adapter, QLCNIC_CRB_DRV_ACTIVE, val);

        if (failed) {
                QLCWR32(adapter, QLCNIC_CRB_DEV_STATE, QLCNIC_DEV_FAILED);
                dev_info(&adapter->pdev->dev,
                                "Device state set to Failed. Please Reboot\n");
        } else if (!(val & 0x11111111))
                QLCWR32(adapter, QLCNIC_CRB_DEV_STATE, QLCNIC_DEV_COLD);

        val = QLCRD32(adapter, QLCNIC_CRB_DRV_STATE);
        QLC_DEV_CLR_RST_QSCNT(val, adapter->portnum);
        QLCWR32(adapter, QLCNIC_CRB_DRV_STATE, val);

        qlcnic_api_unlock(adapter);
err:
        adapter->fw_fail_cnt = 0;
        adapter->flags &= ~QLCNIC_FW_HANG;
        clear_bit(__QLCNIC_START_FW, &adapter->state);
        clear_bit(__QLCNIC_RESETTING, &adapter->state);
}

/* Grab api lock, before checking state */
static int
qlcnic_check_drv_state(struct qlcnic_adapter *adapter)
{
        int act, state, active_mask;

        state = QLCRD32(adapter, QLCNIC_CRB_DRV_STATE);
        act = QLCRD32(adapter, QLCNIC_CRB_DRV_ACTIVE);

        if (adapter->flags & QLCNIC_FW_RESET_OWNER) {
                active_mask = (~(1 << (adapter->ahw->pci_func * 4)));
                act = act & active_mask;
        }

        if (((state & 0x11111111) == (act & 0x11111111)) ||
                        ((act & 0x11111111) == ((state >> 1) & 0x11111111)))
                return 0;
        else
                return 1;
}

static int qlcnic_check_idc_ver(struct qlcnic_adapter *adapter)
{
        u32 val = QLCRD32(adapter, QLCNIC_CRB_DRV_IDC_VER);

        if (val != QLCNIC_DRV_IDC_VER) {
                dev_warn(&adapter->pdev->dev, "IDC Version mismatch, driver's"
                        " idc ver = %x; reqd = %x\n", QLCNIC_DRV_IDC_VER, val);
        }

        return 0;
}

static int
qlcnic_can_start_firmware(struct qlcnic_adapter *adapter)
{
        u32 val, prev_state;
        u8 dev_init_timeo = adapter->dev_init_timeo;
        u8 portnum = adapter->portnum;
        u8 ret;

        if (test_and_clear_bit(__QLCNIC_START_FW, &adapter->state))
                return 1;

        if (qlcnic_api_lock(adapter))
                return -1;

        val = QLCRD32(adapter, QLCNIC_CRB_DRV_ACTIVE);
        if (!(val & (1 << (portnum * 4)))) {
                QLC_DEV_SET_REF_CNT(val, portnum);
                QLCWR32(adapter, QLCNIC_CRB_DRV_ACTIVE, val);
        }

        prev_state = QLCRD32(adapter, QLCNIC_CRB_DEV_STATE);
        QLCDB(adapter, HW, "Device state = %u\n", prev_state);

        switch (prev_state) {
        case QLCNIC_DEV_COLD:
                QLCWR32(adapter, QLCNIC_CRB_DEV_STATE, QLCNIC_DEV_INITIALIZING);
                QLCWR32(adapter, QLCNIC_CRB_DRV_IDC_VER, QLCNIC_DRV_IDC_VER);
                qlcnic_idc_debug_info(adapter, 0);
                qlcnic_api_unlock(adapter);
                return 1;

        case QLCNIC_DEV_READY:
                ret = qlcnic_check_idc_ver(adapter);
                qlcnic_api_unlock(adapter);
                return ret;

        case QLCNIC_DEV_NEED_RESET:
                val = QLCRD32(adapter, QLCNIC_CRB_DRV_STATE);
                QLC_DEV_SET_RST_RDY(val, portnum);
                QLCWR32(adapter, QLCNIC_CRB_DRV_STATE, val);
                break;

        case QLCNIC_DEV_NEED_QUISCENT:
                val = QLCRD32(adapter, QLCNIC_CRB_DRV_STATE);
                QLC_DEV_SET_QSCNT_RDY(val, portnum);
                QLCWR32(adapter, QLCNIC_CRB_DRV_STATE, val);
                break;

        case QLCNIC_DEV_FAILED:
                dev_err(&adapter->pdev->dev, "Device in failed state.\n");
                qlcnic_api_unlock(adapter);
                return -1;

        case QLCNIC_DEV_INITIALIZING:
        case QLCNIC_DEV_QUISCENT:
                break;
        }

        qlcnic_api_unlock(adapter);

        do {
                msleep(1000);
                prev_state = QLCRD32(adapter, QLCNIC_CRB_DEV_STATE);

                if (prev_state == QLCNIC_DEV_QUISCENT)
                        continue;
        } while ((prev_state != QLCNIC_DEV_READY) && --dev_init_timeo);

        if (!dev_init_timeo) {
                dev_err(&adapter->pdev->dev,
                        "Waiting for device to initialize timeout\n");
                return -1;
        }

        if (qlcnic_api_lock(adapter))
                return -1;

        val = QLCRD32(adapter, QLCNIC_CRB_DRV_STATE);
        QLC_DEV_CLR_RST_QSCNT(val, portnum);
        QLCWR32(adapter, QLCNIC_CRB_DRV_STATE, val);

        ret = qlcnic_check_idc_ver(adapter);
        qlcnic_api_unlock(adapter);

        return ret;
}

static void
qlcnic_fwinit_work(struct work_struct *work)
{
        struct qlcnic_adapter *adapter = container_of(work,
                        struct qlcnic_adapter, fw_work.work);
        u32 dev_state = 0xf;
        u32 val;

        if (qlcnic_api_lock(adapter))
                goto err_ret;

        dev_state = QLCRD32(adapter, QLCNIC_CRB_DEV_STATE);
        if (dev_state == QLCNIC_DEV_QUISCENT ||
            dev_state == QLCNIC_DEV_NEED_QUISCENT) {
                qlcnic_api_unlock(adapter);
                qlcnic_schedule_work(adapter, qlcnic_fwinit_work,
                                                FW_POLL_DELAY * 2);
                return;
        }

        if (adapter->op_mode == QLCNIC_NON_PRIV_FUNC) {
                qlcnic_api_unlock(adapter);
                goto wait_npar;
        }

        if (dev_state == QLCNIC_DEV_INITIALIZING ||
            dev_state == QLCNIC_DEV_READY) {
                dev_info(&adapter->pdev->dev, "Detected state change from "
                                "DEV_NEED_RESET, skipping ack check\n");
                goto skip_ack_check;
        }

        if (adapter->fw_wait_cnt++ > adapter->reset_ack_timeo) {
                dev_info(&adapter->pdev->dev, "Reset:Failed to get ack %d sec\n",
                                        adapter->reset_ack_timeo);
                goto skip_ack_check;
        }

        if (!qlcnic_check_drv_state(adapter)) {
skip_ack_check:
                dev_state = QLCRD32(adapter, QLCNIC_CRB_DEV_STATE);

                if (dev_state == QLCNIC_DEV_NEED_RESET) {
                        QLCWR32(adapter, QLCNIC_CRB_DEV_STATE,
                                                QLCNIC_DEV_INITIALIZING);
                        set_bit(__QLCNIC_START_FW, &adapter->state);
                        QLCDB(adapter, DRV, "Restarting fw\n");
                        qlcnic_idc_debug_info(adapter, 0);
                        val = QLCRD32(adapter, QLCNIC_CRB_DRV_STATE);
                        QLC_DEV_SET_RST_RDY(val, adapter->portnum);
                        QLCWR32(adapter, QLCNIC_CRB_DRV_STATE, val);
                }

                qlcnic_api_unlock(adapter);

                rtnl_lock();
                if (adapter->ahw->fw_dump.enable &&
                    (adapter->flags & QLCNIC_FW_RESET_OWNER)) {
                        QLCDB(adapter, DRV, "Take FW dump\n");
                        qlcnic_dump_fw(adapter);
                        adapter->flags |= QLCNIC_FW_HANG;
                }
                rtnl_unlock();

                adapter->flags &= ~QLCNIC_FW_RESET_OWNER;
                if (!adapter->nic_ops->start_firmware(adapter)) {
                        qlcnic_schedule_work(adapter, qlcnic_attach_work, 0);
                        adapter->fw_wait_cnt = 0;
                        return;
                }
                goto err_ret;
        }

        qlcnic_api_unlock(adapter);

wait_npar:
        dev_state = QLCRD32(adapter, QLCNIC_CRB_DEV_STATE);
        QLCDB(adapter, HW, "Func waiting: Device state=%u\n", dev_state);

        switch (dev_state) {
        case QLCNIC_DEV_READY:
                if (!adapter->nic_ops->start_firmware(adapter)) {
                        qlcnic_schedule_work(adapter, qlcnic_attach_work, 0);
                        adapter->fw_wait_cnt = 0;
                        return;
                }
        case QLCNIC_DEV_FAILED:
                break;
        default:
                qlcnic_schedule_work(adapter,
                        qlcnic_fwinit_work, FW_POLL_DELAY);
                return;
        }

err_ret:
        dev_err(&adapter->pdev->dev, "Fwinit work failed state=%u "
                "fw_wait_cnt=%u\n", dev_state, adapter->fw_wait_cnt);
        netif_device_attach(adapter->netdev);
        qlcnic_clr_all_drv_state(adapter, 0);
}

static void
qlcnic_detach_work(struct work_struct *work)
{
        struct qlcnic_adapter *adapter = container_of(work,
                        struct qlcnic_adapter, fw_work.work);
        struct net_device *netdev = adapter->netdev;
        u32 status;

        netif_device_detach(netdev);

        /* Dont grab rtnl lock during Quiscent mode */
        if (adapter->dev_state == QLCNIC_DEV_NEED_QUISCENT) {
                if (netif_running(netdev))
                        __qlcnic_down(adapter, netdev);
        } else
                qlcnic_down(adapter, netdev);

        status = QLCRD32(adapter, QLCNIC_PEG_HALT_STATUS1);

        if (status & QLCNIC_RCODE_FATAL_ERROR) {
                dev_err(&adapter->pdev->dev,
                        "Detaching the device: peg halt status1=0x%x\n",
                                        status);

                if (QLCNIC_FWERROR_CODE(status) == QLCNIC_FWERROR_FAN_FAILURE) {
                        dev_err(&adapter->pdev->dev,
                        "On board active cooling fan failed. "
                                "Device has been halted.\n");
                        dev_err(&adapter->pdev->dev,
                                "Replace the adapter.\n");
                }

                goto err_ret;
        }

        if (adapter->temp == QLCNIC_TEMP_PANIC) {
                dev_err(&adapter->pdev->dev, "Detaching the device: temp=%d\n",
                        adapter->temp);
                goto err_ret;
        }

        /* Dont ack if this instance is the reset owner */
        if (!(adapter->flags & QLCNIC_FW_RESET_OWNER)) {
                if (qlcnic_set_drv_state(adapter, adapter->dev_state)) {
                        dev_err(&adapter->pdev->dev,
                                "Failed to set driver state,"
                                        "detaching the device.\n");
                        goto err_ret;
                }
        }

        adapter->fw_wait_cnt = 0;

        qlcnic_schedule_work(adapter, qlcnic_fwinit_work, FW_POLL_DELAY);

        return;

err_ret:
        netif_device_attach(netdev);
        qlcnic_clr_all_drv_state(adapter, 1);
}

/*Transit NPAR state to NON Operational */
static void
qlcnic_set_npar_non_operational(struct qlcnic_adapter *adapter)
{
        u32 state;

        state = QLCRD32(adapter, QLCNIC_CRB_DEV_NPAR_STATE);
        if (state == QLCNIC_DEV_NPAR_NON_OPER)
                return;

        if (qlcnic_api_lock(adapter))
                return;
        QLCWR32(adapter, QLCNIC_CRB_DEV_NPAR_STATE, QLCNIC_DEV_NPAR_NON_OPER);
        qlcnic_api_unlock(adapter);
}

/*Transit to RESET state from READY state only */
void
qlcnic_dev_request_reset(struct qlcnic_adapter *adapter)
{