/* cnic.c: Broadcom CNIC core network driver.
 *
 * Copyright (c) 2006-2009 Broadcom Corporation
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation.
 *
 * Original skeleton written by: John(Zongxi) Chen (zongxi@broadcom.com)
 * Modified and maintained by: Michael Chan <mchan@broadcom.com>
 */

#include <linux/module.h>

#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/list.h>
#include <linux/slab.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/uio_driver.h>
#include <linux/in.h>
#include <linux/dma-mapping.h>
#include <linux/delay.h>
#include <linux/ethtool.h>
#include <linux/if_vlan.h>
#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
#define BCM_VLAN 1
#endif
#include <net/ip.h>
#include <net/tcp.h>
#include <net/route.h>
#include <net/ipv6.h>
#include <net/ip6_route.h>
#include <scsi/iscsi_if.h>

#include "cnic_if.h"
#include "bnx2.h"
#include "cnic.h"
#include "cnic_defs.h"

#define DRV_MODULE_NAME         "cnic"
#define PFX DRV_MODULE_NAME     ": "

static char version[] __devinitdata =
        "Broadcom NetXtreme II CNIC Driver " DRV_MODULE_NAME " v" CNIC_MODULE_VERSION " (" CNIC_MODULE_RELDATE ")\n";

MODULE_AUTHOR("Michael Chan <mchan@broadcom.com> and John(Zongxi) "
              "Chen (zongxi@broadcom.com");
MODULE_DESCRIPTION("Broadcom NetXtreme II CNIC Driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(CNIC_MODULE_VERSION);

static LIST_HEAD(cnic_dev_list);
static DEFINE_RWLOCK(cnic_dev_lock);
static DEFINE_MUTEX(cnic_lock);

static struct cnic_ulp_ops *cnic_ulp_tbl[MAX_CNIC_ULP_TYPE];

static int cnic_service_bnx2(void *, void *);
static int cnic_ctl(void *, struct cnic_ctl_info *);

static struct cnic_ops cnic_bnx2_ops = {
        .cnic_owner     = THIS_MODULE,
        .cnic_handler   = cnic_service_bnx2,
        .cnic_ctl       = cnic_ctl,
};

static void cnic_shutdown_bnx2_rx_ring(struct cnic_dev *);
static void cnic_init_bnx2_tx_ring(struct cnic_dev *);
static void cnic_init_bnx2_rx_ring(struct cnic_dev *);
static int cnic_cm_set_pg(struct cnic_sock *);

static int cnic_uio_open(struct uio_info *uinfo, struct inode *inode)
{
        struct cnic_dev *dev = uinfo->priv;
        struct cnic_local *cp = dev->cnic_priv;

        if (!capable(CAP_NET_ADMIN))
                return -EPERM;

        if (cp->uio_dev != -1)
                return -EBUSY;

        cp->uio_dev = iminor(inode);

        cnic_init_bnx2_tx_ring(dev);
        cnic_init_bnx2_rx_ring(dev);

        return 0;
}

static int cnic_uio_close(struct uio_info *uinfo, struct inode *inode)
{
        struct cnic_dev *dev = uinfo->priv;
        struct cnic_local *cp = dev->cnic_priv;

        cnic_shutdown_bnx2_rx_ring(dev);

        cp->uio_dev = -1;
        return 0;
}

static inline void cnic_hold(struct cnic_dev *dev)
{
        atomic_inc(&dev->ref_count);
}

static inline void cnic_put(struct cnic_dev *dev)
{
        atomic_dec(&dev->ref_count);
}

static inline void csk_hold(struct cnic_sock *csk)
{
        atomic_inc(&csk->ref_count);
}

static inline void csk_put(struct cnic_sock *csk)
{
        atomic_dec(&csk->ref_count);
}

static struct cnic_dev *cnic_from_netdev(struct net_device *netdev)
{
        struct cnic_dev *cdev;

        read_lock(&cnic_dev_lock);
        list_for_each_entry(cdev, &cnic_dev_list, list) {
                if (netdev == cdev->netdev) {
                        cnic_hold(cdev);
                        read_unlock(&cnic_dev_lock);
                        return cdev;
                }
        }
        read_unlock(&cnic_dev_lock);
        return NULL;
}

static inline void ulp_get(struct cnic_ulp_ops *ulp_ops)
{
        atomic_inc(&ulp_ops->ref_count);
}

static inline void ulp_put(struct cnic_ulp_ops *ulp_ops)
{
        atomic_dec(&ulp_ops->ref_count);
}

static void cnic_ctx_wr(struct cnic_dev *dev, u32 cid_addr, u32 off, u32 val)
{
        struct cnic_local *cp = dev->cnic_priv;
        struct cnic_eth_dev *ethdev = cp->ethdev;
        struct drv_ctl_info info;
        struct drv_ctl_io *io = &info.data.io;

        info.cmd = DRV_CTL_CTX_WR_CMD;
        io->cid_addr = cid_addr;
        io->offset = off;
        io->data = val;
        ethdev->drv_ctl(dev->netdev, &info);
}

static void cnic_reg_wr_ind(struct cnic_dev *dev, u32 off, u32 val)
{
        struct cnic_local *cp = dev->cnic_priv;
        struct cnic_eth_dev *ethdev = cp->ethdev;
        struct drv_ctl_info info;
        struct drv_ctl_io *io = &info.data.io;

        info.cmd = DRV_CTL_IO_WR_CMD;
        io->offset = off;
        io->data = val;
        ethdev->drv_ctl(dev->netdev, &info);
}

static u32 cnic_reg_rd_ind(struct cnic_dev *dev, u32 off)
{
        struct cnic_local *cp = dev->cnic_priv;
        struct cnic_eth_dev *ethdev = cp->ethdev;
        struct drv_ctl_info info;
        struct drv_ctl_io *io = &info.data.io;

        info.cmd = DRV_CTL_IO_RD_CMD;
        io->offset = off;
        ethdev->drv_ctl(dev->netdev, &info);
        return io->data;
}

static int cnic_in_use(struct cnic_sock *csk)
{
        return test_bit(SK_F_INUSE, &csk->flags);
}

static void cnic_kwq_completion(struct cnic_dev *dev, u32 count)
{
        struct cnic_local *cp = dev->cnic_priv;
        struct cnic_eth_dev *ethdev = cp->ethdev;
        struct drv_ctl_info info;

        info.cmd = DRV_CTL_COMPLETION_CMD;
        info.data.comp.comp_count = count;
        ethdev->drv_ctl(dev->netdev, &info);
}

static int cnic_send_nlmsg(struct cnic_local *cp, u32 type,
                           struct cnic_sock *csk)
{
        struct iscsi_path path_req;
        char *buf = NULL;
        u16 len = 0;
        u32 msg_type = ISCSI_KEVENT_IF_DOWN;
        struct cnic_ulp_ops *ulp_ops;

        if (cp->uio_dev == -1)
                return -ENODEV;

        if (csk) {
                len = sizeof(path_req);
                buf = (char *) &path_req;
                memset(&path_req, 0, len);

                msg_type = ISCSI_KEVENT_PATH_REQ;
                path_req.handle = (u64) csk->l5_cid;
                if (test_bit(SK_F_IPV6, &csk->flags)) {
                        memcpy(&path_req.dst.v6_addr, &csk->dst_ip[0],
                               sizeof(struct in6_addr));
                        path_req.ip_addr_len = 16;
                } else {
                        memcpy(&path_req.dst.v4_addr, &csk->dst_ip[0],
                               sizeof(struct in_addr));
                        path_req.ip_addr_len = 4;
                }
                path_req.vlan_id = csk->vlan_id;
                path_req.pmtu = csk->mtu;
        }

        rcu_read_lock();
        ulp_ops = rcu_dereference(cnic_ulp_tbl[CNIC_ULP_ISCSI]);
        if (ulp_ops)
                ulp_ops->iscsi_nl_send_msg(cp->dev, msg_type, buf, len);
        rcu_read_unlock();
        return 0;
}

static int cnic_iscsi_nl_msg_recv(struct cnic_dev *dev, u32 msg_type,
                                  char *buf, u16 len)
{
        int rc = -EINVAL;

        switch (msg_type) {
        case ISCSI_UEVENT_PATH_UPDATE: {
                struct cnic_local *cp;
                u32 l5_cid;
                struct cnic_sock *csk;
                struct iscsi_path *path_resp;

                if (len < sizeof(*path_resp))
                        break;

                path_resp = (struct iscsi_path *) buf;
                cp = dev->cnic_priv;
                l5_cid = (u32) path_resp->handle;
                if (l5_cid >= MAX_CM_SK_TBL_SZ)
                        break;

                csk = &cp->csk_tbl[l5_cid];
                csk_hold(csk);
                if (cnic_in_use(csk)) {
                        memcpy(csk->ha, path_resp->mac_addr, 6);
                        if (test_bit(SK_F_IPV6, &csk->flags))
                                memcpy(&csk->src_ip[0], &path_resp->src.v6_addr,
                                       sizeof(struct in6_addr));
                        else
                                memcpy(&csk->src_ip[0], &path_resp->src.v4_addr,
                                       sizeof(struct in_addr));
                        if (is_valid_ether_addr(csk->ha))
                                cnic_cm_set_pg(csk);
                }
                csk_put(csk);
                rc = 0;
        }
        }

        return rc;
}

static int cnic_offld_prep(struct cnic_sock *csk)
{
        if (test_and_set_bit(SK_F_OFFLD_SCHED, &csk->flags))
                return 0;

        if (!test_bit(SK_F_CONNECT_START, &csk->flags)) {
                clear_bit(SK_F_OFFLD_SCHED, &csk->flags);
                return 0;
        }

        return 1;
}

static int cnic_close_prep(struct cnic_sock *csk)
{
        clear_bit(SK_F_CONNECT_START, &csk->flags);
        smp_mb__after_clear_bit();

        if (test_and_clear_bit(SK_F_OFFLD_COMPLETE, &csk->flags)) {
                while (test_and_set_bit(SK_F_OFFLD_SCHED, &csk->flags))
                        msleep(1);

                return 1;
        }
        return 0;
}

static int cnic_abort_prep(struct cnic_sock *csk)
{
        clear_bit(SK_F_CONNECT_START, &csk->flags);
        smp_mb__after_clear_bit();

        while (test_and_set_bit(SK_F_OFFLD_SCHED, &csk->flags))
                msleep(1);

        if (test_and_clear_bit(SK_F_OFFLD_COMPLETE, &csk->flags)) {
                csk->state = L4_KCQE_OPCODE_VALUE_RESET_COMP;
                return 1;
        }

        return 0;
}

static void cnic_uio_stop(void)
{
        struct cnic_dev *dev;

        read_lock(&cnic_dev_lock);
        list_for_each_entry(dev, &cnic_dev_list, list) {
                struct cnic_local *cp = dev->cnic_priv;

                if (cp->cnic_uinfo)
                        cnic_send_nlmsg(cp, ISCSI_KEVENT_IF_DOWN, NULL);
        }
        read_unlock(&cnic_dev_lock);
}

int cnic_register_driver(int ulp_type, struct cnic_ulp_ops *ulp_ops)
{
        struct cnic_dev *dev;

        if (ulp_type >= MAX_CNIC_ULP_TYPE) {
                printk(KERN_ERR PFX "cnic_register_driver: Bad type %d\n",
                       ulp_type);
                return -EINVAL;
        }
        mutex_lock(&cnic_lock);
        if (cnic_ulp_tbl[ulp_type]) {
                printk(KERN_ERR PFX "cnic_register_driver: Type %d has already "
                                    "been registered\n", ulp_type);
                mutex_unlock(&cnic_lock);
                return -EBUSY;
        }

        read_lock(&cnic_dev_lock);
        list_for_each_entry(dev, &cnic_dev_list, list) {
                struct cnic_local *cp = dev->cnic_priv;

                clear_bit(ULP_F_INIT, &cp->ulp_flags[ulp_type]);
        }
        read_unlock(&cnic_dev_lock);

        atomic_set(&ulp_ops->ref_count, 0);
        rcu_assign_pointer(cnic_ulp_tbl[ulp_type], ulp_ops);
        mutex_unlock(&cnic_lock);

        /* Prevent race conditions with netdev_event */
        rtnl_lock();
        read_lock(&cnic_dev_lock);
        list_for_each_entry(dev, &cnic_dev_list, list) {
                struct cnic_local *cp = dev->cnic_priv;

                if (!test_and_set_bit(ULP_F_INIT, &cp->ulp_flags[ulp_type]))
                        ulp_ops->cnic_init(dev);
        }
        read_unlock(&cnic_dev_lock);
        rtnl_unlock();

        return 0;
}

int cnic_unregister_driver(int ulp_type)
{
        struct cnic_dev *dev;
        struct cnic_ulp_ops *ulp_ops;
        int i = 0;

        if (ulp_type >= MAX_CNIC_ULP_TYPE) {
                printk(KERN_ERR PFX "cnic_unregister_driver: Bad type %d\n",
                       ulp_type);
                return -EINVAL;
        }
        mutex_lock(&cnic_lock);
        ulp_ops = cnic_ulp_tbl[ulp_type];
        if (!ulp_ops) {
                printk(KERN_ERR PFX "cnic_unregister_driver: Type %d has not "
                                    "been registered\n", ulp_type);
                goto out_unlock;
        }
        read_lock(&cnic_dev_lock);
        list_for_each_entry(dev, &cnic_dev_list, list) {
                struct cnic_local *cp = dev->cnic_priv;

                if (rcu_dereference(cp->ulp_ops[ulp_type])) {
                        printk(KERN_ERR PFX "cnic_unregister_driver: Type %d "
                               "still has devices registered\n", ulp_type);
                        read_unlock(&cnic_dev_lock);
                        goto out_unlock;
                }
        }
        read_unlock(&cnic_dev_lock);

        if (ulp_type == CNIC_ULP_ISCSI)
                cnic_uio_stop();

        rcu_assign_pointer(cnic_ulp_tbl[ulp_type], NULL);

        mutex_unlock(&cnic_lock);
        synchronize_rcu();
        while ((atomic_read(&ulp_ops->ref_count) != 0) && (i < 20)) {
                msleep(100);
                i++;
        }

        if (atomic_read(&ulp_ops->ref_count) != 0)
                printk(KERN_WARNING PFX "%s: Failed waiting for ref count to go"
                                        " to zero.\n", dev->netdev->name);
        return 0;

out_unlock:
        mutex_unlock(&cnic_lock);
        return -EINVAL;
}

static int cnic_start_hw(struct cnic_dev *);
static void cnic_stop_hw(struct cnic_dev *);

static int cnic_register_device(struct cnic_dev *dev, int ulp_type,
                                void *ulp_ctx)
{
        struct cnic_local *cp = dev->cnic_priv;
        struct cnic_ulp_ops *ulp_ops;

        if (ulp_type >= MAX_CNIC_ULP_TYPE) {
                printk(KERN_ERR PFX "cnic_register_device: Bad type %d\n",
                       ulp_type);
                return -EINVAL;
        }
        mutex_lock(&cnic_lock);
        if (cnic_ulp_tbl[ulp_type] == NULL) {
                printk(KERN_ERR PFX "cnic_register_device: Driver with type %d "
                                    "has not been registered\n", ulp_type);
                mutex_unlock(&cnic_lock);
                return -EAGAIN;
        }
        if (rcu_dereference(cp->ulp_ops[ulp_type])) {
                printk(KERN_ERR PFX "cnic_register_device: Type %d has already "
                       "been registered to this device\n", ulp_type);
                mutex_unlock(&cnic_lock);
                return -EBUSY;
        }

        clear_bit(ULP_F_START, &cp->ulp_flags[ulp_type]);
        cp->ulp_handle[ulp_type] = ulp_ctx;
        ulp_ops = cnic_ulp_tbl[ulp_type];
        rcu_assign_pointer(cp->ulp_ops[ulp_type], ulp_ops);
        cnic_hold(dev);

        if (test_bit(CNIC_F_CNIC_UP, &dev->flags))
                if (!test_and_set_bit(ULP_F_START, &cp->ulp_flags[ulp_type]))
                        ulp_ops->cnic_start(cp->ulp_handle[ulp_type]);

        mutex_unlock(&cnic_lock);

        return 0;

}
EXPORT_SYMBOL(cnic_register_driver);

static int cnic_unregister_device(struct cnic_dev *dev, int ulp_type)
{
        struct cnic_local *cp = dev->cnic_priv;
        int i = 0;

        if (ulp_type >= MAX_CNIC_ULP_TYPE) {
                printk(KERN_ERR PFX "cnic_unregister_device: Bad type %d\n",
                       ulp_type);
                return -EINVAL;
        }
        mutex_lock(&cnic_lock);
        if (rcu_dereference(cp->ulp_ops[ulp_type])) {
                rcu_assign_pointer(cp->ulp_ops[ulp_type], NULL);
                cnic_put(dev);
        } else {
                printk(KERN_ERR PFX "cnic_unregister_device: device not "
                       "registered to this ulp type %d\n", ulp_type);
                mutex_unlock(&cnic_lock);
                return -EINVAL;
        }
        mutex_unlock(&cnic_lock);

        synchronize_rcu();

        while (test_bit(ULP_F_CALL_PENDING, &cp->ulp_flags[ulp_type]) &&
               i < 20) {
                msleep(100);
                i++;
        }
        if (test_bit(ULP_F_CALL_PENDING, &cp->ulp_flags[ulp_type]))
                printk(KERN_WARNING PFX "%s: Failed waiting for ULP up call"
                                        " to complete.\n", dev->netdev->name);

        return 0;
}
EXPORT_SYMBOL(cnic_unregister_driver);

static int cnic_init_id_tbl(struct cnic_id_tbl *id_tbl, u32 size, u32 start_id)
{
        id_tbl->start = start_id;
        id_tbl->max = size;
        id_tbl->next = 0;
        spin_lock_init(&id_tbl->lock);
        id_tbl->table = kzalloc(DIV_ROUND_UP(size, 32) * 4, GFP_KERNEL);
        if (!id_tbl->table)
                return -ENOMEM;

        return 0;
}

static void cnic_free_id_tbl(struct cnic_id_tbl *id_tbl)
{
        kfree(id_tbl->table);
        id_tbl->table = NULL;
}

static int cnic_alloc_id(struct cnic_id_tbl *id_tbl, u32 id)
{
        int ret = -1;

        id -= id_tbl->start;
        if (id >= id_tbl->max)
                return ret;

        spin_lock(&id_tbl->lock);
        if (!test_bit(id, id_tbl->table)) {
                set_bit(id, id_tbl->table);
                ret = 0;
        }
        spin_unlock(&id_tbl->lock);
        return ret;
}

/* Returns -1 if not successful */
static u32 cnic_alloc_new_id(struct cnic_id_tbl *id_tbl)
{
        u32 id;

        spin_lock(&id_tbl->lock);
        id = find_next_zero_bit(id_tbl->table, id_tbl->max, id_tbl->next);
        if (id >= id_tbl->max) {
                id = -1;
                if (id_tbl->next != 0) {
                        id = find_first_zero_bit(id_tbl->table, id_tbl->next);
                        if (id >= id_tbl->next)
                                id = -1;
                }
        }

        if (id < id_tbl->max) {
                set_bit(id, id_tbl->table);
                id_tbl->next = (id + 1) & (id_tbl->max - 1);
                id += id_tbl->start;
        }

        spin_unlock(&id_tbl->lock);

        return id;
}

static void cnic_free_id(struct cnic_id_tbl *id_tbl, u32 id)
{
        if (id == -1)
                return;

        id -= id_tbl->start;
        if (id >= id_tbl->max)
                return;

        clear_bit(id, id_tbl->table);
}

static void cnic_free_dma(struct cnic_dev *dev, struct cnic_dma *dma)
{
        int i;

        if (!dma->pg_arr)
                return;

        for (i = 0; i < dma->num_pages; i++) {
                if (dma->pg_arr[i]) {
                        pci_free_consistent(dev->pcidev, BCM_PAGE_SIZE,
                                            dma->pg_arr[i], dma->pg_map_arr[i]);
                        dma->pg_arr[i] = NULL;
                }
        }
        if (dma->pgtbl) {
                pci_free_consistent(dev->pcidev, dma->pgtbl_size,
                                    dma->pgtbl, dma->pgtbl_map);
                dma->pgtbl = NULL;
        }
        kfree(dma->pg_arr);
        dma->pg_arr = NULL;
        dma->num_pages = 0;
}

static void cnic_setup_page_tbl(struct cnic_dev *dev, struct cnic_dma *dma)
{
        int i;
        u32 *page_table = dma->pgtbl;

        for (i = 0; i < dma->num_pages; i++) {
                /* Each entry needs to be in big endian format. */
                *page_table = (u32) ((u64) dma->pg_map_arr[i] >> 32);
                page_table++;
                *page_table = (u32) dma->pg_map_arr[i];
                page_table++;
        }
}

static int cnic_alloc_dma(struct cnic_dev *dev, struct cnic_dma *dma,
                          int pages, int use_pg_tbl)
{
        int i, size;
        struct cnic_local *cp = dev->cnic_priv;

        size = pages * (sizeof(void *) + sizeof(dma_addr_t));
        dma->pg_arr = kzalloc(size, GFP_ATOMIC);
        if (dma->pg_arr == NULL)
                return -ENOMEM;

        dma->pg_map_arr = (dma_addr_t *) (dma->pg_arr + pages);
        dma->num_pages = pages;

        for (i = 0; i < pages; i++) {
                dma->pg_arr[i] = pci_alloc_consistent(dev->pcidev,
                                                      BCM_PAGE_SIZE,
                                                      &dma->pg_map_arr[i]);
                if (dma->pg_arr[i] == NULL)
                        goto error;
        }
        if (!use_pg_tbl)
                return 0;

        dma->pgtbl_size = ((pages * 8) + BCM_PAGE_SIZE - 1) &
                          ~(BCM_PAGE_SIZE - 1);
        dma->pgtbl = pci_alloc_consistent(dev->pcidev, dma->pgtbl_size,
                                          &dma->pgtbl_map);
        if (dma->pgtbl == NULL)
                goto error;

        cp->setup_pgtbl(dev, dma);

        return 0;

error:
        cnic_free_dma(dev, dma);
        return -ENOMEM;
}

static void cnic_free_resc(struct cnic_dev *dev)
{
        struct cnic_local *cp = dev->cnic_priv;
        int i = 0;

        if (cp->cnic_uinfo) {
                while (cp->uio_dev != -1 && i < 15) {
                        msleep(100);
                        i++;
                }
                uio_unregister_device(cp->cnic_uinfo);
                kfree(cp->cnic_uinfo);
                cp->cnic_uinfo = NULL;
        }

        if (cp->l2_buf) {
                pci_free_consistent(dev->pcidev, cp->l2_buf_size,
                                    cp->l2_buf, cp->l2_buf_map);
                cp->l2_buf = NULL;
        }

        if (cp->l2_ring) {
                pci_free_consistent(dev->pcidev, cp->l2_ring_size,
                                    cp->l2_ring, cp->l2_ring_map);
                cp->l2_ring = NULL;
        }

        for (i = 0; i < cp->ctx_blks; i++) {
                if (cp->ctx_arr[i].ctx) {
                        pci_free_consistent(dev->pcidev, cp->ctx_blk_size,
                                            cp->ctx_arr[i].ctx,
                                            cp->ctx_arr[i].mapping);
                        cp->ctx_arr[i].ctx = NULL;
                }
        }
        kfree(cp->ctx_arr);
        cp->ctx_arr = NULL;
        cp->ctx_blks = 0;

        cnic_free_dma(dev, &cp->gbl_buf_info);
        cnic_free_dma(dev, &cp->conn_buf_info);
        cnic_free_dma(dev, &cp->kwq_info);
        cnic_free_dma(dev, &cp->kcq_info);
        kfree(cp->iscsi_tbl);
        cp->iscsi_tbl = NULL;
        kfree(cp->ctx_tbl);
        cp->ctx_tbl = NULL;

        cnic_free_id_tbl(&cp->cid_tbl);
}

static int cnic_alloc_context(struct cnic_dev *dev)
{
        struct cnic_local *cp = dev->cnic_priv;

        if (CHIP_NUM(cp) == CHIP_NUM_5709) {
                int i, k, arr_size;

                cp->ctx_blk_size = BCM_PAGE_SIZE;
                cp->cids_per_blk = BCM_PAGE_SIZE / 128;
                arr_size = BNX2_MAX_CID / cp->cids_per_blk *
                           sizeof(struct cnic_ctx);
                cp->ctx_arr = kzalloc(arr_size, GFP_KERNEL);
                if (cp->ctx_arr == NULL)
                        return -ENOMEM;

                k = 0;
                for (i = 0; i < 2; i++) {
                        u32 j, reg, off, lo, hi;

                        if (i == 0)
                                off = BNX2_PG_CTX_MAP;
                        else
                                off = BNX2_ISCSI_CTX_MAP;

                        reg = cnic_reg_rd_ind(dev, off);
                        lo = reg >> 16;
                        hi = reg & 0xffff;
                        for (j = lo; j < hi; j += cp->cids_per_blk, k++)
                                cp->ctx_arr[k].cid = j;
                }

                cp->ctx_blks = k;
                if (cp->ctx_blks >= (BNX2_MAX_CID / cp->cids_per_blk)) {
                        cp->ctx_blks = 0;
                        return -ENOMEM;
                }

                for (i = 0; i < cp->ctx_blks; i++) {
                        cp->ctx_arr[i].ctx =
                                pci_alloc_consistent(dev->pcidev, BCM_PAGE_SIZE,
                                                     &cp->ctx_arr[i].mapping);
                        if (cp->ctx_arr[i].ctx == NULL)
                                return -ENOMEM;
                }
        }
        return 0;
}

static int cnic_alloc_l2_rings(struct cnic_dev *dev, int pages)
{
        struct cnic_local *cp = dev->cnic_priv;

        cp->l2_ring_size = pages * BCM_PAGE_SIZE;
        cp->l2_ring = pci_alloc_consistent(dev->pcidev, cp->l2_ring_size,
                                           &cp->l2_ring_map);
        if (!cp->l2_ring)
                return -ENOMEM;

        cp->l2_buf_size = (cp->l2_rx_ring_size + 1) * cp->l2_single_buf_size;
        cp->l2_buf_size = PAGE_ALIGN(cp->l2_buf_size);
        cp->l2_buf = pci_alloc_consistent(dev->pcidev, cp->l2_buf_size,
                                           &cp->l2_buf_map);
        if (!cp->l2_buf)
                return -ENOMEM;

        return 0;
}

static int cnic_alloc_uio(struct cnic_dev *dev) {
        struct cnic_local *cp = dev->cnic_priv;
        struct uio_info *uinfo;
        int ret;

        uinfo = kzalloc(sizeof(*uinfo), GFP_ATOMIC);
        if (!uinfo)
                return -ENOMEM;

        uinfo->mem[0].addr = dev->netdev->base_addr;
        uinfo->mem[0].internal_addr = dev->regview;
        uinfo->mem[0].size = dev->netdev->mem_end - dev->netdev->mem_start;
        uinfo->mem[0].memtype = UIO_MEM_PHYS;

        uinfo->mem[1].addr = (unsigned long) cp->status_blk & PAGE_MASK;
        if (test_bit(CNIC_F_BNX2_CLASS, &dev->flags)) {
                if (cp->ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX)
                        uinfo->mem[1].size = BNX2_SBLK_MSIX_ALIGN_SIZE * 9;
                else
                        uinfo->mem[1].size = BNX2_SBLK_MSIX_ALIGN_SIZE;

                uinfo->name = "bnx2_cnic";
        }

        uinfo->mem[1].memtype = UIO_MEM_LOGICAL;

        uinfo->mem[2].addr = (unsigned long) cp->l2_ring;
        uinfo->mem[2].size = cp->l2_ring_size;
        uinfo->mem[2].memtype = UIO_MEM_LOGICAL;

        uinfo->mem[3].addr = (unsigned long) cp->l2_buf;
        uinfo->mem[3].size = cp->l2_buf_size;
        uinfo->mem[3].memtype = UIO_MEM_LOGICAL;

        uinfo->version = CNIC_MODULE_VERSION;
        uinfo->irq = UIO_IRQ_CUSTOM;

        uinfo->open = cnic_uio_open;
        uinfo->release = cnic_uio_close;

        uinfo->priv = dev;

        ret = uio_register_device(&dev->pcidev->dev, uinfo);
        if (ret) {
                kfree(uinfo);
                return ret;
        }

        cp->cnic_uinfo = uinfo;
        return 0;
}

static int cnic_alloc_bnx2_resc(struct cnic_dev *dev)
{
        struct cnic_local *cp = dev->cnic_priv;
        int ret;

        ret = cnic_alloc_dma(dev, &cp->kwq_info, KWQ_PAGE_CNT, 1);
        if (ret)
                goto error;
        cp->kwq = (struct kwqe **) cp->kwq_info.pg_arr;

        ret = cnic_alloc_dma(dev, &cp->kcq_info, KCQ_PAGE_CNT, 1);
        if (ret)
                goto error;
        cp->kcq = (struct kcqe **) cp->kcq_info.pg_arr;

        ret = cnic_alloc_context(dev);
        if (ret)
                goto error;

        ret = cnic_alloc_l2_rings(dev, 2);
        if (ret)
                goto error;

        ret = cnic_alloc_uio(dev);
        if (ret)
                goto error;

        return 0;

error:
        cnic_free_resc(dev);
        return ret;
}

static inline u32 cnic_kwq_avail(struct cnic_local *cp)
{
        return cp->max_kwq_idx -
                ((cp->kwq_prod_idx - cp->kwq_con_idx) & cp->max_kwq_idx);
}

static int cnic_submit_bnx2_kwqes(struct cnic_dev *dev, struct kwqe *wqes[],
                                  u32 num_wqes)
{
        struct cnic_local *cp = dev->cnic_priv;
        struct kwqe *prod_qe;
        u16 prod, sw_prod, i;

        if (!test_bit(CNIC_F_CNIC_UP, &dev->flags))
                return -EAGAIN;         /* bnx2 is down */

        spin_lock_bh(&cp->cnic_ulp_lock);
        if (num_wqes > cnic_kwq_avail(cp) &&
            !(cp->cnic_local_flags & CNIC_LCL_FL_KWQ_INIT)) {
                spin_unlock_bh(&cp->cnic_ulp_lock);
                return -EAGAIN;
        }

        cp->cnic_local_flags &= ~CNIC_LCL_FL_KWQ_INIT;

        prod = cp->kwq_prod_idx;
        sw_prod = prod & MAX_KWQ_IDX;
        for (i = 0; i < num_wqes; i++) {
                prod_qe = &cp->kwq[KWQ_PG(sw_prod)][KWQ_IDX(sw_prod)];
                memcpy(prod_qe, wqes[i], sizeof(struct kwqe));
                prod++;
                sw_prod = prod & MAX_KWQ_IDX;
        }
        cp->kwq_prod_idx = prod;

        CNIC_WR16(dev, cp->kwq_io_addr, cp->kwq_prod_idx);

        spin_unlock_bh(&cp->cnic_ulp_lock);
        return 0;
}

static void service_kcqes(struct cnic_dev *dev, int num_cqes)
{
        struct cnic_local *cp = dev->cnic_priv;
        int i, j;

        i = 0;
        j = 1;
        while (num_cqes) {
                struct cnic_ulp_ops *ulp_ops;
                int ulp_type;
                u32 kcqe_op_flag = cp->completed_kcq[i]->kcqe_op_flag;
                u32 kcqe_layer = kcqe_op_flag & KCQE_FLAGS_LAYER_MASK;

                if (unlikely(kcqe_op_flag & KCQE_RAMROD_COMPLETION))
                        cnic_kwq_completion(dev, 1);

                while (j < num_cqes) {
                        u32 next_op = cp->completed_kcq[i + j]->kcqe_op_flag;

                        if ((next_op & KCQE_FLAGS_LAYER_MASK) != kcqe_layer)
                                break;

                        if (unlikely(next_op & KCQE_RAMROD_COMPLETION))
                                cnic_kwq_completion(dev, 1);
                        j++;
                }

                if (kcqe_layer == KCQE_FLAGS_LAYER_MASK_L5_RDMA)
                        ulp_type = CNIC_ULP_RDMA;
                else if (kcqe_layer == KCQE_FLAGS_LAYER_MASK_L5_ISCSI)
                        ulp_type = CNIC_ULP_ISCSI;
                else if (kcqe_layer == KCQE_FLAGS_LAYER_MASK_L4)
                        ulp_type = CNIC_ULP_L4;
                else if (kcqe_layer == KCQE_FLAGS_LAYER_MASK_L2)
                        goto end;
                else {
                        printk(KERN_ERR PFX "%s: Unknown type of KCQE(0x%x)\n",
                               dev->netdev->name, kcqe_op_flag);
                        goto end;
                }

                rcu_read_lock();
                ulp_ops = rcu_dereference(cp->ulp_ops[ulp_type]);
                if (likely(ulp_ops)) {
                        ulp_ops->indicate_kcqes(cp->ulp_handle[ulp_type],
                                                  cp->completed_kcq + i, j);
                }
                rcu_read_unlock();
end:
                num_cqes -= j;
                i += j;
                j = 1;
        }
        return;
}

static u16 cnic_bnx2_next_idx(u16 idx)
{
        return idx + 1;
}

static u16 cnic_bnx2_hw_idx(u16 idx)
{
        return idx;
}

static int cnic_get_kcqes(struct cnic_dev *dev, u16 hw_prod, u16 *sw_prod)
{
        struct cnic_local *cp = dev->cnic_priv;
        u16 i, ri, last;
        struct kcqe *kcqe;
        int kcqe_cnt = 0, last_cnt = 0;

        i = ri = last = *sw_prod;
        ri &= MAX_KCQ_IDX;

        while ((i != hw_prod) && (kcqe_cnt < MAX_COMPLETED_KCQE)) {

                kcqe = &cp->kcq[KCQ_PG(ri)][KCQ_IDX(ri)];
                cp->completed_kcq[kcqe_cnt++] = kcqe;
                i = cp->next_idx(i);
                ri = i & MAX_KCQ_IDX;
                if (likely(!(kcqe->kcqe_op_flag & KCQE_FLAGS_NEXT))) {
                        last_cnt = kcqe_cnt;
                        last = i;
                }
        }

        *sw_prod = last;
        return last_cnt;
}

static void cnic_chk_bnx2_pkt_rings(struct cnic_local *cp)
{
        u16 rx_cons = *cp->rx_cons_ptr;
        u16 tx_cons = *cp->tx_cons_ptr;

        if (cp->tx_cons != tx_cons || cp->rx_cons != rx_cons) {
                cp->tx_cons = tx_cons;
                cp->rx_cons = rx_cons;
                uio_event_notify(cp->cnic_uinfo);
        }
}

static int cnic_service_bnx2(void *data, void *status_blk)
{
        struct cnic_dev *dev = data;
        struct status_block *sblk = status_blk;
        struct cnic_local *cp = dev->cnic_priv;
        u32 status_idx = sblk->status_idx;
        u16 hw_prod, sw_prod;
        int kcqe_cnt;

        if (unlikely(!test_bit(CNIC_F_CNIC_UP, &dev->flags)))
                return status_idx;

        cp->kwq_con_idx = *cp->kwq_con_idx_ptr;

        hw_prod = sblk->status_completion_producer_index;
        sw_prod = cp->kcq_prod_idx;
        while (sw_prod != hw_prod) {
                kcqe_cnt = cnic_get_kcqes(dev, hw_prod, &sw_prod);
                if (kcqe_cnt == 0)
                        goto done;

                service_kcqes(dev, kcqe_cnt);

                /* Tell compiler that status_blk fields can change. */
                barrier();
                if (status_idx != sblk->status_idx) {
                        status_idx = sblk->status_idx;
                        cp->kwq_con_idx = *cp->kwq_con_idx_ptr;
                        hw_prod = sblk->status_completion_producer_index;
                } else
                        break;
        }

done:
        CNIC_WR16(dev, cp->kcq_io_addr, sw_prod);

        cp->kcq_prod_idx = sw_prod;

        cnic_chk_bnx2_pkt_rings(cp);
        return status_idx;
}

static void cnic_service_bnx2_msix(unsigned long data)
{
        struct cnic_dev *dev = (struct cnic_dev *) data;
        struct cnic_local *cp = dev->cnic_priv;
        struct status_block_msix *status_blk = cp->bnx2_status_blk;
        u32 status_idx = status_blk->status_idx;
        u16 hw_prod, sw_prod;
        int kcqe_cnt;

        cp->kwq_con_idx = status_blk->status_cmd_consumer_index;

        hw_prod = status_blk->status_completion_producer_index;
        sw_prod = cp->kcq_prod_idx;
        while (sw_prod != hw_prod) {
                kcqe_cnt = cnic_get_kcqes(dev, hw_prod, &sw_prod);
                if (kcqe_cnt == 0)
                        goto done;

                service_kcqes(dev, kcqe_cnt);

                /* Tell compiler that status_blk fields can change. */
                barrier();
                if (status_idx != status_blk->status_idx) {
                        status_idx = status_blk->status_idx;
                        cp->kwq_con_idx = status_blk->status_cmd_consumer_index;
                        hw_prod = status_blk->status_completion_producer_index;
                } else
                        break;
        }

done:
        CNIC_WR16(dev, cp->kcq_io_addr, sw_prod);
        cp->kcq_prod_idx = sw_prod;

        cnic_chk_bnx2_pkt_rings(cp);

        cp->last_status_idx = status_idx;
        CNIC_WR(dev, BNX2_PCICFG_INT_ACK_CMD, cp->int_num |
                BNX2_PCICFG_INT_ACK_CMD_INDEX_VALID | cp->last_status_idx);
}

static irqreturn_t cnic_irq(int irq, void *dev_instance)
{
        struct cnic_dev *dev = dev_instance;
        struct cnic_local *cp = dev->cnic_priv;
        u16 prod = cp->kcq_prod_idx & MAX_KCQ_IDX;

        if (cp->ack_int)
                cp->ack_int(dev);

        prefetch(cp->status_blk);
        prefetch(&cp->kcq[KCQ_PG(prod)][KCQ_IDX(prod)]);

        if (likely(test_bit(CNIC_F_CNIC_UP, &dev->flags)))
                tasklet_schedule(&cp->cnic_irq_task);

        return IRQ_HANDLED;
}

static void cnic_ulp_stop(struct cnic_dev *dev)
{
        struct cnic_local *cp = dev->cnic_priv;
        int if_type;

        if (cp->cnic_uinfo)
                cnic_send_nlmsg(cp, ISCSI_KEVENT_IF_DOWN, NULL);

        for (if_type = 0; if_type < MAX_CNIC_ULP_TYPE; if_type++) {
                struct cnic_ulp_ops *ulp_ops;

                mutex_lock(&cnic_lock);
                ulp_ops = cp->ulp_ops[if_type];
                if (!ulp_ops) {
                        mutex_unlock(&cnic_lock);
                        continue;
                }
                set_bit(ULP_F_CALL_PENDING, &cp->ulp_flags[if_type]);
                mutex_unlock(&cnic_lock);

                if (test_and_clear_bit(ULP_F_START, &cp->ulp_flags[if_type]))
                        ulp_ops->cnic_stop(cp->ulp_handle[if_type]);

                clear_bit(ULP_F_CALL_PENDING, &cp->ulp_flags[if_type]);
        }
}

static void cnic_ulp_start(struct cnic_dev *dev)
{
        struct cnic_local *cp = dev->cnic_priv;
        int if_type;

        for (if_type = 0; if_type < MAX_CNIC_ULP_TYPE; if_type++) {
                struct cnic_ulp_ops *ulp_ops;

                mutex_lock(&cnic_lock);
                ulp_ops = cp->ulp_ops[if_type];
                if (!ulp_ops || !ulp_ops->cnic_start) {
                        mutex_unlock(&cnic_lock);
                        continue;
                }
                set_bit(ULP_F_CALL_PENDING, &cp->ulp_flags[if_type]);
                mutex_unlock(&cnic_lock);

                if (!test_and_set_bit(ULP_F_START, &cp->ulp_flags[if_type]))
                        ulp_ops->cnic_start(cp->ulp_handle[if_type]);

                clear_bit(ULP_F_CALL_PENDING, &cp->ulp_flags[if_type]);
        }
}

static int cnic_ctl(void *data, struct cnic_ctl_info *info)
{
        struct cnic_dev *dev = data;

        switch (info->cmd) {
        case CNIC_CTL_STOP_CMD:
                cnic_hold(dev);

                cnic_ulp_stop(dev);
                cnic_stop_hw(dev);

                cnic_put(dev);
                break;
        case CNIC_CTL_START_CMD:
                cnic_hold(dev);

                if (!cnic_start_hw(dev))
                        cnic_ulp_start(dev);

                cnic_put(dev);
                break;
        default:
                return -EINVAL;
        }
        return 0;
}

static void cnic_ulp_init(struct cnic_dev *dev)
{
        int i;
        struct cnic_local *cp = dev->cnic_priv;

        for (i = 0; i < MAX_CNIC_ULP_TYPE_EXT; i++) {
                struct cnic_ulp_ops *ulp_ops;

                mutex_lock(&cnic_lock);
                ulp_ops = cnic_ulp_tbl[i];
                if (!ulp_ops || !ulp_ops->cnic_init) {
                        mutex_unlock(&cnic_lock);
                        continue;
                }
                ulp_get(ulp_ops);
                mutex_unlock(&cnic_lock);

                if (!test_and_set_bit(ULP_F_INIT, &cp->ulp_flags[i]))
                        ulp_ops->cnic_init(dev);

                ulp_put(ulp_ops);
        }
}

static void cnic_ulp_exit(struct cnic_dev *dev)
{
        int i;
        struct cnic_local *cp = dev->cnic_priv;

        for (i = 0; i < MAX_CNIC_ULP_TYPE_EXT; i++) {
                struct cnic_ulp_ops *ulp_ops;

                mutex_lock(&cnic_lock);
                ulp_ops = cnic_ulp_tbl[i];
                if (!ulp_ops || !ulp_ops->cnic_exit) {
                        mutex_unlock(&cnic_lock);
                        continue;
                }
                ulp_get(ulp_ops);
                mutex_unlock(&cnic_lock);

                if (test_and_clear_bit(ULP_F_INIT, &cp->ulp_flags[i]))
                        ulp_ops->cnic_exit(dev);

                ulp_put(ulp_ops);
        }
}

static int cnic_cm_offload_pg(struct cnic_sock *csk)
{
        struct cnic_dev *dev = csk->dev;
        struct l4_kwq_offload_pg *l4kwqe;
        struct kwqe *wqes[1];

        l4kwqe = (struct l4_kwq_offload_pg *) &csk->kwqe1;
        memset(l4kwqe, 0, sizeof(*l4kwqe));
        wqes[0] = (struct kwqe *) l4kwqe;

        l4kwqe->op_code = L4_KWQE_OPCODE_VALUE_OFFLOAD_PG;
        l4kwqe->flags =
                L4_LAYER_CODE << L4_KWQ_OFFLOAD_PG_LAYER_CODE_SHIFT;
        l4kwqe->l2hdr_nbytes = ETH_HLEN;

        l4kwqe->da0 = csk->ha[0];
        l4kwqe->da1 = csk->ha[1];
        l4kwqe->da2 = csk->ha[2];
        l4kwqe->da3 = csk->ha[3];
        l4kwqe->da4 = csk->ha[4];
        l4kwqe->da5 = csk->ha[5];

        l4kwqe->sa0 = dev->mac_addr[0];
        l4kwqe->sa1 = dev->mac_addr[1];
        l4kwqe->sa2 = dev->mac_addr[2];
        l4kwqe->sa3 = dev->mac_addr[3];
        l4kwqe->sa4 = dev->mac_addr[4];
        l4kwqe->sa5 = dev->mac_addr[5];

        l4kwqe->etype = ETH_P_IP;
        l4kwqe->ipid_count = DEF_IPID_COUNT;
        l4kwqe->host_opaque = csk->l5_cid;

        if (csk->vlan_id) {
                l4kwqe->pg_flags |= L4_KWQ_OFFLOAD_PG_VLAN_TAGGING;
                l4kwqe->vlan_tag = csk->vlan_id;
                l4kwqe->l2hdr_nbytes += 4;
        }

        return dev->submit_kwqes(dev, wqes, 1);
}

static int cnic_cm_update_pg(struct cnic_sock *csk)
{
        struct cnic_dev *dev = csk->dev;
        struct l4_kwq_update_pg *l4kwqe;
        struct kwqe *wqes[1];

        l4kwqe = (struct l4_kwq_update_pg *) &csk->kwqe1;
        memset(l4kwqe, 0, sizeof(*l4kwqe));
        wqes[0] = (struct kwqe *) l4kwqe;

        l4kwqe->opcode = L4_KWQE_OPCODE_VALUE_UPDATE_PG;
        l4kwqe->flags =
                L4_LAYER_CODE << L4_KWQ_UPDATE_PG_LAYER_CODE_SHIFT;
        l4kwqe->pg_cid = csk->pg_cid;

        l4kwqe->da0 = csk->ha[0];
        l4kwqe->da1 = csk->ha[1];
        l4kwqe->da2 = csk->ha[2];
        l4kwqe->da3 = csk->ha[3];
        l4kwqe->da4 = csk->ha[4];
        l4kwqe->da5 = csk->ha[5];

        l4kwqe->pg_host_opaque = csk->l5_cid;
        l4kwqe->pg_valids = L4_KWQ_UPDATE_PG_VALIDS_DA;

        return dev->submit_kwqes(dev, wqes, 1);
}

static int cnic_cm_upload_pg(struct cnic_sock *csk)
{
        struct cnic_dev *dev = csk->dev;
        struct l4_kwq_upload *l4kwqe;
        struct kwqe *wqes[1];

        l4kwqe = (struct l4_kwq_upload *) &csk->kwqe1;
        memset(l4kwqe, 0, sizeof(*l4kwqe));
        wqes[0] = (struct kwqe *) l4kwqe;

        l4kwqe->opcode = L4_KWQE_OPCODE_VALUE_UPLOAD_PG;
        l4kwqe->flags =
                L4_LAYER_CODE << L4_KWQ_UPLOAD_LAYER_CODE_SHIFT;
        l4kwqe->cid = csk->pg_cid;

        return dev->submit_kwqes(dev, wqes, 1);
}

static int cnic_cm_conn_req(struct cnic_sock *csk)
{
        struct cnic_dev *dev = csk->dev;
        struct l4_kwq_connect_req1 *l4kwqe1;
        struct l4_kwq_connect_req2 *l4kwqe2;
        struct l4_kwq_connect_req3 *l4kwqe3;
        struct kwqe *wqes[3];
        u8 tcp_flags = 0;
        int num_wqes = 2;

        l4kwqe1 = (struct l4_kwq_connect_req1 *) &csk->kwqe1;
        l4kwqe2 = (struct l4_kwq_connect_req2 *) &csk->kwqe2;
        l4kwqe3 = (struct l4_kwq_connect_req3 *) &csk->kwqe3;
        memset(l4kwqe1, 0, sizeof(*l4kwqe1));
        memset(l4kwqe2, 0, sizeof(*l4kwqe2));
        memset(l4kwqe3, 0, sizeof(*l4kwqe3));

        l4kwqe3->op_code = L4_KWQE_OPCODE_VALUE_CONNECT3;
        l4kwqe3->flags =
                L4_LAYER_CODE << L4_KWQ_CONNECT_REQ3_LAYER_CODE_SHIFT;
        l4kwqe3->ka_timeout = csk->ka_timeout;
        l4kwqe3->ka_interval = csk->ka_interval;
        l4kwqe3->ka_max_probe_count = csk->ka_max_probe_count;
        l4kwqe3->tos = csk->tos;
        l4kwqe3->ttl = csk->ttl;
        l4kwqe3->snd_seq_scale = csk->snd_seq_scale;
        l4kwqe3->pmtu = csk->mtu;
        l4kwqe3->rcv_buf = csk->rcv_buf;
        l4kwqe3->snd_buf = csk->snd_buf;
        l4kwqe3->seed = csk->seed;

        wqes[0] = (struct kwqe *) l4kwqe1;
        if (test_bit(SK_F_IPV6, &csk->flags)) {
                wqes[1] = (struct kwqe *) l4kwqe2;
                wqes[2] = (struct kwqe *) l4kwqe3;
                num_wqes = 3;

                l4kwqe1->conn_flags = L4_KWQ_CONNECT_REQ1_IP_V6;
                l4kwqe2->op_code = L4_KWQE_OPCODE_VALUE_CONNECT2;
                l4kwqe2->flags =
                        L4_KWQ_CONNECT_REQ2_LINKED_WITH_NEXT |
                        L4_LAYER_CODE << L4_KWQ_CONNECT_REQ2_LAYER_CODE_SHIFT;
                l4kwqe2->src_ip_v6_2 = be32_to_cpu(csk->src_ip[1]);
                l4kwqe2->src_ip_v6_3 = be32_to_cpu(csk->src_ip[2]);
                l4kwqe2->src_ip_v6_4 = be32_to_cpu(csk->src_ip[3]);
                l4kwqe2->dst_ip_v6_2 = be32_to_cpu(csk->dst_ip[1]);
                l4kwqe2->dst_ip_v6_3 = be32_to_cpu(csk->dst_ip[2]);
                l4kwqe2->dst_ip_v6_4 = be32_to_cpu(csk->dst_ip[3]);
                l4kwqe3->mss = l4kwqe3->pmtu - sizeof(struct ipv6hdr) -
                               sizeof(struct tcphdr);
        } else {
                wqes[1] = (struct kwqe *) l4kwqe3;
                l4kwqe3->mss = l4kwqe3->pmtu - sizeof(struct iphdr) -
                               sizeof(struct tcphdr);
        }

        l4kwqe1->op_code = L4_KWQE_OPCODE_VALUE_CONNECT1;
        l4kwqe1->flags =
                (L4_LAYER_CODE << L4_KWQ_CONNECT_REQ1_LAYER_CODE_SHIFT) |
                 L4_KWQ_CONNECT_REQ3_LINKED_WITH_NEXT;
        l4kwqe1->cid = csk->cid;
        l4kwqe1->pg_cid = csk->pg_cid;
        l4kwqe1->src_ip = be32_to_cpu(csk->src_ip[0]);
        l4kwqe1->dst_ip = be32_to_cpu(csk->dst_ip[0]);
        l4kwqe1->src_port = be16_to_cpu(csk->src_port);
        l4kwqe1->dst_port = be16_to_cpu(csk->dst_port);
        if (csk->tcp_flags & SK_TCP_NO_DELAY_ACK)
                tcp_flags |= L4_KWQ_CONNECT_REQ1_NO_DELAY_ACK;
        if (csk->tcp_flags & SK_TCP_KEEP_ALIVE)
                tcp_flags |= L4_KWQ_CONNECT_REQ1_KEEP_ALIVE;
        if (csk->tcp_flags & SK_TCP_NAGLE)
                tcp_flags |= L4_KWQ_CONNECT_REQ1_NAGLE_ENABLE;
        if (csk->tcp_flags & SK_TCP_TIMESTAMP)
                tcp_flags |= L4_KWQ_CONNECT_REQ1_TIME_STAMP;
        if (csk->tcp_flags & SK_TCP_SACK)
                tcp_flags |= L4_KWQ_CONNECT_REQ1_SACK;
        if (csk->tcp_flags & SK_TCP_SEG_SCALING)
                tcp_flags |= L4_KWQ_CONNECT_REQ1_SEG_SCALING;

        l4kwqe1->tcp_flags = tcp_flags;

        return dev->submit_kwqes(dev, wqes, num_wqes);
}

static int cnic_cm_close_req(struct cnic_sock *csk)
{
        struct cnic_dev *dev = csk->dev;
        struct l4_kwq_close_req *l4kwqe;
        struct kwqe *wqes[1];

        l4kwqe = (struct l4_kwq_close_req *) &csk->kwqe2;
        memset(l4kwqe, 0, sizeof(*l4kwqe));
        wqes[0] = (struct kwqe *) l4kwqe;

        l4kwqe->op_code = L4_KWQE_OPCODE_VALUE_CLOSE;
        l4kwqe->flags = L4_LAYER_CODE << L4_KWQ_CLOSE_REQ_LAYER_CODE_SHIFT;
        l4kwqe->cid = csk->cid;

        return dev->submit_kwqes(dev, wqes, 1);
}

static int cnic_cm_abort_req(struct cnic_sock *csk)
{
        struct cnic_dev *dev = csk->dev;
        struct l4_kwq_reset_req *l4kwqe;
        struct kwqe *wqes[1];

        l4kwqe = (struct l4_kwq_reset_req *) &csk->kwqe2;
        memset(l4kwqe, 0, sizeof(*l4kwqe));
        wqes[0] = (struct kwqe *) l4kwqe;

        l4kwqe->op_code = L4_KWQE_OPCODE_VALUE_RESET;
        l4kwqe->flags = L4_LAYER_CODE << L4_KWQ_RESET_REQ_LAYER_CODE_SHIFT;
        l4kwqe->cid = csk->cid;

        return dev->submit_kwqes(dev, wqes, 1);
}

static int cnic_cm_create(struct cnic_dev *dev, int ulp_type, u32 cid,
                          u32 l5_cid, struct cnic_sock **csk, void *context)
{
        struct cnic_local *cp = dev->cnic_priv;
        struct cnic_sock *csk1;

        if (l5_cid >= MAX_CM_SK_TBL_SZ)
                return -EINVAL;

        csk1 = &cp->csk_tbl[l5_cid];
        if (atomic_read(&csk1->ref_count))
                return -EAGAIN;

        if (test_and_set_bit(SK_F_INUSE, &csk1->flags))
                return -EBUSY;

        csk1->dev = dev;
        csk1->cid = cid;
        csk1->l5_cid = l5_cid;
        csk1->ulp_type = ulp_type;
        csk1->context = context;

        csk1->ka_timeout = DEF_KA_TIMEOUT;
        csk1->ka_interval = DEF_KA_INTERVAL;
        csk1->ka_max_probe_count = DEF_KA_MAX_PROBE_COUNT;
        csk1->tos = DEF_TOS;
        csk1->ttl = DEF_TTL;
        csk1->snd_seq_scale = DEF_SND_SEQ_SCALE;
        csk1->rcv_buf = DEF_RCV_BUF;
        csk1->snd_buf = DEF_SND_BUF;
        csk1->seed = DEF_SEED;

        *csk = csk1;
        return 0;
}

static void cnic_cm_cleanup(struct cnic_sock *csk)
{
        if (csk->src_port) {
                struct cnic_dev *dev = csk->dev;
                struct cnic_local *cp = dev->cnic_priv;

                cnic_free_id(&cp->csk_port_tbl, csk->src_port);
                csk->src_port = 0;
        }
}

static void cnic_close_conn(struct cnic_sock *csk)
{
        if (test_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags)) {
                cnic_cm_upload_pg(csk);
                clear_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags);
        }
        cnic_cm_cleanup(csk);
}

static int cnic_cm_destroy(struct cnic_sock *csk)
{
        if (!cnic_in_use(csk))
                return -EINVAL;

        csk_hold(csk);
        clear_bit(SK_F_INUSE, &csk->flags);
        smp_mb__after_clear_bit();
        while (atomic_read(&csk->ref_count) != 1)
                msleep(1);
        cnic_cm_cleanup(csk);

        csk->flags = 0;
        csk_put(csk);
        return 0;
}

static inline u16 cnic_get_vlan(struct net_device *dev,
                                struct net_device **vlan_dev)
{
        if (dev->priv_flags & IFF_802_1Q_VLAN) {
                *vlan_dev = vlan_dev_real_dev(dev);
                return vlan_dev_vlan_id(dev);
        }
        *vlan_dev = dev;
        return 0;
}

static int cnic_get_v4_route(struct sockaddr_in *dst_addr,
                             struct dst_entry **dst)
{
#if defined(CONFIG_INET)
        struct flowi fl;
        int err;
        struct rtable *rt;

        memset(&fl, 0, sizeof(fl));
        fl.nl_u.ip4_u.daddr = dst_addr->sin_addr.s_addr;

        err = ip_route_output_key(&init_net, &rt, &fl);
        if (!err)
                *dst = &rt->u.dst;
        return err;
#else
        return -ENETUNREACH;
#endif
}

static int cnic_get_v6_route(struct sockaddr_in6 *dst_addr,
                             struct dst_entry **dst)
{
#if defined(CONFIG_IPV6) || (defined(CONFIG_IPV6_MODULE) && defined(MODULE))
        struct flowi fl;

        memset(&fl, 0, sizeof(fl));
        ipv6_addr_copy(&fl.fl6_dst, &dst_addr->sin6_addr);
        if (ipv6_addr_type(&fl.fl6_dst) & IPV6_ADDR_LINKLOCAL)
                fl.oif = dst_addr->sin6_scope_id;

        *dst = ip6_route_output(&init_net, NULL, &fl);
        if (*dst)
                return 0;
#endif

        return -ENETUNREACH;
}

static struct cnic_dev *cnic_cm_select_dev(struct sockaddr_in *dst_addr,
                                           int ulp_type)
{
        struct cnic_dev *dev = NULL;
        struct dst_entry *dst;
        struct net_device *netdev = NULL;
        int err = -ENETUNREACH;

        if (dst_addr->sin_family == AF_INET)
                err = cnic_get_v4_route(dst_addr, &dst);
        else if (dst_addr->sin_family == AF_INET6) {
                struct sockaddr_in6 *dst_addr6 =
                        (struct sockaddr_in6 *) dst_addr;

                err = cnic_get_v6_route(dst_addr6, &dst);
        } else
                return NULL;

        if (err)
                return NULL;

        if (!dst->dev)
                goto done;

        cnic_get_vlan(dst->dev, &netdev);

        dev = cnic_from_netdev(netdev);

done:
        dst_release(dst);
        if (dev)
                cnic_put(dev);
        return dev;
}

static int cnic_resolve_addr(struct cnic_sock *csk, struct cnic_sockaddr *saddr)
{
        struct cnic_dev *dev = csk->dev;
        struct cnic_local *cp = dev->cnic_priv;

        return cnic_send_nlmsg(cp, ISCSI_KEVENT_PATH_REQ, csk);
}

static int cnic_get_route(struct cnic_sock *csk, struct cnic_sockaddr *saddr)
{
        struct cnic_dev *dev = csk->dev;
        struct cnic_local *cp = dev->cnic_priv;
        int is_v6, err, rc = -ENETUNREACH;
        struct dst_entry *dst;
        struct net_device *realdev;
        u32 local_port;

        if (saddr->local.v6.sin6_family == AF_INET6 &&
            saddr->remote.v6.sin6_family == AF_INET6)
                is_v6 = 1;
        else if (saddr->local.v4.sin_family == AF_INET &&
                 saddr->remote.v4.sin_family == AF_INET)
                is_v6 = 0;
        else
                return -EINVAL;

        clear_bit(SK_F_IPV6, &csk->flags);

        if (is_v6) {
#if defined(CONFIG_IPV6) || (defined(CONFIG_IPV6_MODULE) && defined(MODULE))
                set_bit(SK_F_IPV6, &csk->flags);
                err = cnic_get_v6_route(&saddr->remote.v6, &dst);
                if (err)
                        return err;

                if (!dst || dst->error || !dst->dev)
                        goto err_out;

                memcpy(&csk->dst_ip[0], &saddr->remote.v6.sin6_addr,
                       sizeof(struct in6_addr));
                csk->dst_port = saddr->remote.v6.sin6_port;
                local_port = saddr->local.v6.sin6_port;
#else
                return rc;
#endif

        } else {
                err = cnic_get_v4_route(&saddr->remote.v4, &dst);
                if (err)
                        return err;

                if (!dst || dst->error || !dst->dev)
                        goto err_out;

                csk->dst_ip[0] = saddr->remote.v4.sin_addr.s_addr;
                csk->dst_port = saddr->remote.v4.sin_port;
                local_port = saddr->local.v4.sin_port;
        }

        csk->vlan_id = cnic_get_vlan(dst->dev, &realdev);
        if (realdev != dev->netdev)
                goto err_out;

        if (local_port >= CNIC_LOCAL_PORT_MIN &&
            local_port < CNIC_LOCAL_PORT_MAX) {
                if (cnic_alloc_id(&cp->csk_port_tbl, local_port))
                        local_port = 0;
        } else
                local_port = 0;

        if (!local_port) {
                local_port = cnic_alloc_new_id(&cp->csk_port_tbl);
                if (local_port == -1) {
                        rc = -ENOMEM;
                        goto err_out;
                }
        }
        csk->src_port = local_port;

        csk->mtu = dst_mtu(dst);
        rc = 0;

err_out:
        dst_release(dst);
        return rc;
}

static void cnic_init_csk_state(struct cnic_sock *csk)
{
        csk->state = 0;
        clear_bit(SK_F_OFFLD_SCHED, &csk->flags);
        clear_bit(SK_F_CLOSING, &csk->flags);
}

static int cnic_cm_connect(struct cnic_sock *csk, struct cnic_sockaddr *saddr)
{
        int err = 0;

        if (!cnic_in_use(csk))
                return -EINVAL;

        if (test_and_set_bit(SK_F_CONNECT_START, &csk->flags))
                return -EINVAL;

        cnic_init_csk_state(csk);

        err = cnic_get_route(csk, saddr);
        if (err)
                goto err_out;

        err = cnic_resolve_addr(csk, saddr);
        if (!err)
                return 0;

err_out:
        clear_bit(SK_F_CONNECT_START, &csk->flags);
        return err;
}

static int cnic_cm_abort(struct cnic_sock *csk)
{
        struct cnic_local *cp = csk->dev->cnic_priv;
        u32 opcode;

        if (!cnic_in_use(csk))
                return -EINVAL;

        if (cnic_abort_prep(csk))
                return cnic_cm_abort_req(csk);

        /* Getting here means that we haven't started connect, or
         * connect was not successful.
         */

        csk->state = L4_KCQE_OPCODE_VALUE_RESET_COMP;
        if (test_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags))
                opcode = csk->state;
        else
                opcode = L5CM_RAMROD_CMD_ID_TERMINATE_OFFLOAD;
        cp->close_conn(csk, opcode);

        return 0;
}

static int cnic_cm_close(struct cnic_sock *csk)
{
        if (!cnic_in_use(csk))
                return -EINVAL;

        if (cnic_close_prep(csk)) {
                csk->state = L4_KCQE_OPCODE_VALUE_CLOSE_COMP;
                return cnic_cm_close_req(csk);
        }
        return 0;
}

static void cnic_cm_upcall(struct cnic_local *cp, struct cnic_sock *csk,
                           u8 opcode)
{
        struct cnic_ulp_ops *ulp_ops;
        int ulp_type = csk->ulp_type;

        rcu_read_lock();
        ulp_ops = rcu_dereference(cp->ulp_ops[ulp_type]);
        if (ulp_ops) {
                if (opcode == L4_KCQE_OPCODE_VALUE_CONNECT_COMPLETE)
                        ulp_ops->cm_connect_complete(csk);
                else if (opcode == L4_KCQE_OPCODE_VALUE_CLOSE_COMP)
                        ulp_ops->cm_close_complete(csk);
                else if (opcode == L4_KCQE_OPCODE_VALUE_RESET_RECEIVED)
                        ulp_ops->cm_remote_abort(csk);
                else if (opcode == L4_KCQE_OPCODE_VALUE_RESET_COMP)
                        ulp_ops->cm_abort_complete(csk);
                else if (opcode == L4_KCQE_OPCODE_VALUE_CLOSE_RECEIVED)
                        ulp_ops->cm_remote_close(csk);
        }
        rcu_read_unlock();
}

static int cnic_cm_set_pg(struct cnic_sock *csk)
{
        if (cnic_offld_prep(csk)) {
                if (test_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags))
                        cnic_cm_update_pg(csk);
                else
                        cnic_cm_offload_pg(csk);
        }
        return 0;
}

static void cnic_cm_process_offld_pg(struct cnic_dev *dev, struct l4_kcq *kcqe)
{
        struct cnic_local *cp = dev->cnic_priv;
        u32 l5_cid = kcqe->pg_host_opaque;
        u8 opcode = kcqe->op_code;
        struct cnic_sock *csk = &cp->csk_tbl[l5_cid];

        csk_hold(csk);
        if (!cnic_in_use(csk))
                goto done;

        if (opcode == L4_KCQE_OPCODE_VALUE_UPDATE_PG) {
                clear_bit(SK_F_OFFLD_SCHED, &csk->flags);
                goto done;
        }
        csk->pg_cid = kcqe->pg_cid;
        set_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags);
        cnic_cm_conn_req(csk);

done:
        csk_put(csk);
}

static void cnic_cm_process_kcqe(struct cnic_dev *dev, struct kcqe *kcqe)
{
        struct cnic_local *cp = dev->cnic_priv;
        struct l4_kcq *l4kcqe = (struct l4_kcq *) kcqe;
        u8 opcode = l4kcqe->op_code;
        u32 l5_cid;
        struct cnic_sock *csk;

        if (opcode == L4_KCQE_OPCODE_VALUE_OFFLOAD_PG ||
            opcode == L4_KCQE_OPCODE_VALUE_UPDATE_PG) {
                cnic_cm_process_offld_pg(dev, l4kcqe);
                return;
        }

        l5_cid = l4kcqe->conn_id;
        if (opcode & 0x80)
                l5_cid = l4kcqe->cid;
        if (l5_cid >= MAX_CM_SK_TBL_SZ)
                return;

        csk = &cp->csk_tbl[l5_cid];
        csk_hold(csk);

        if (!cnic_in_use(csk)) {
                csk_put(csk);
                return;
        }

        switch (opcode) {
        case L4_KCQE_OPCODE_VALUE_CONNECT_COMPLETE:
                if (l4kcqe->status == 0)
                        set_bit(SK_F_OFFLD_COMPLETE, &csk->flags);

                smp_mb__before_clear_bit();
                clear_bit(SK_F_OFFLD_SCHED, &csk->flags);
                cnic_cm_upcall(cp, csk, opcode);
                break;

        case L4_KCQE_OPCODE_VALUE_RESET_RECEIVED:
                if (test_and_clear_bit(SK_F_OFFLD_COMPLETE, &csk->flags))
                        csk->state = opcode;
                /* fall through */
        case L4_KCQE_OPCODE_VALUE_CLOSE_COMP:
        case L4_KCQE_OPCODE_VALUE_RESET_COMP:
                cp->close_conn(csk, opcode);
                break;

        case L4_KCQE_OPCODE_VALUE_CLOSE_RECEIVED:
                cnic_cm_upcall(cp, csk, opcode);
                break;
        }
        csk_put(csk);
}

static void cnic_cm_indicate_kcqe(void *data, struct kcqe *kcqe[], u32 num)
{
        struct cnic_dev *dev = data;
        int i;

        for (i = 0; i < num; i++)
                cnic_cm_process_kcqe(dev, kcqe[i]);
}

static struct cnic_ulp_ops cm_ulp_ops = {
        .indicate_kcqes         = cnic_cm_indicate_kcqe,
};

static void cnic_cm_free_mem(struct cnic_dev *dev)
{
        struct cnic_local *cp = dev->cnic_priv;

        kfree(cp->csk_tbl);
        cp->csk_tbl = NULL;
        cnic_free_id_tbl(&cp->csk_port_tbl);
}

static int cnic_cm_alloc_mem(struct cnic_dev *dev)
{
        struct cnic_local *cp = dev->cnic_priv;

        cp->csk_tbl = kzalloc(sizeof(struct cnic_sock) * MAX_CM_SK_TBL_SZ,
                              GFP_KERNEL);
        if (!cp->csk_tbl)
                return -ENOMEM;

        if (cnic_init_id_tbl(&cp->csk_port_tbl, CNIC_LOCAL_PORT_RANGE,
                             CNIC_LOCAL_PORT_MIN)) {
                cnic_cm_free_mem(dev);
                return -ENOMEM;
        }
        return 0;
}

static int cnic_ready_to_close(struct cnic_sock *csk, u32 opcode)
{
        if ((opcode == csk->state) ||
            (opcode == L4_KCQE_OPCODE_VALUE_RESET_RECEIVED &&
             csk->state == L4_KCQE_OPCODE_VALUE_CLOSE_COMP)) {
                if (!test_and_set_bit(SK_F_CLOSING, &csk->flags))
                        return 1;
        }
        return 0;
}

static void cnic_close_bnx2_conn(struct cnic_sock *csk, u32 opcode)
{
        struct cnic_dev *dev = csk->dev;
        struct cnic_local *cp = dev->cnic_priv;

        clear_bit(SK_F_CONNECT_START, &csk->flags);
        if (cnic_ready_to_close(csk, opcode)) {
                cnic_close_conn(csk);
                cnic_cm_upcall(cp, csk, opcode);
        }
}

static void cnic_cm_stop_bnx2_hw(struct cnic_dev *dev)
{
}

static int cnic_cm_init_bnx2_hw(struct cnic_dev *dev)
{
        u32 seed;

        get_random_bytes(&seed, 4);
        cnic_ctx_wr(dev, 45, 0, seed);
        return 0;
}

static int cnic_cm_open(struct cnic_dev *dev)
{
        struct cnic_local *cp = dev->cnic_priv;
        int err;

        err = cnic_cm_alloc_mem(dev);
        if (err)
                return err;

        err = cp->start_cm(dev);

        if (err)
                goto err_out;

        dev->cm_create = cnic_cm_create;
        dev->cm_destroy = cnic_cm_destroy;
        dev->cm_connect = cnic_cm_connect;
        dev->cm_abort = cnic_cm_abort;
        dev->cm_close = cnic_cm_close;
        dev->cm_select_dev = cnic_cm_select_dev;

        cp->ulp_handle[CNIC_ULP_L4] = dev;
        rcu_assign_pointer(cp->ulp_ops[CNIC_ULP_L4], &cm_ulp_ops);
        return 0;

err_out:
        cnic_cm_free_mem(dev);
        return err;
}

static int cnic_cm_shutdown(struct cnic_dev *dev)
{
        struct cnic_local *cp = dev->cnic_priv;
        int i;

        cp->stop_cm(dev);

        if (!cp->csk_tbl)
                return 0;

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

                struct cnic_sock *csk = &cp->csk_tbl[i];

                clear_bit(SK_F_INUSE, &csk->flags);
                cnic_cm_cleanup(csk);
        }
        cnic_cm_free_mem(dev);

        return 0;
}

static void cnic_init_context(struct cnic_dev *dev, u32 cid)
{
        struct cnic_local *cp = dev->cnic_priv;
        u32 cid_addr;
        int i;

        if (CHIP_NUM(cp) == CHIP_NUM_5709)
                return;

        cid_addr = GET_CID_ADDR(cid);

        for (i = 0; i < CTX_SIZE; i += 4)
                cnic_ctx_wr(dev, cid_addr, i, 0);
}

static int cnic_setup_5709_context(struct cnic_dev *dev, int valid)
{
        struct cnic_local *cp = dev->cnic_priv;
        int ret = 0, i;
        u32 valid_bit = valid ? BNX2_CTX_HOST_PAGE_TBL_DATA0_VALID : 0;

        if (CHIP_NUM(cp) != CHIP_NUM_5709)
                return 0;

        for (i = 0; i < cp->ctx_blks; i++) {
                int j;
                u32 idx = cp->ctx_arr[i].cid / cp->cids_per_blk;
                u32 val;

                memset(cp->ctx_arr[i].ctx, 0, BCM_PAGE_SIZE);

                CNIC_WR(dev, BNX2_CTX_HOST_PAGE_TBL_DATA0,
                        (cp->ctx_arr[i].mapping & 0xffffffff) | valid_bit);
                CNIC_WR(dev, BNX2_CTX_HOST_PAGE_TBL_DATA1,
                        (u64) cp->ctx_arr[i].mapping >> 32);
                CNIC_WR(dev, BNX2_CTX_HOST_PAGE_TBL_CTRL, idx |
                        BNX2_CTX_HOST_PAGE_TBL_CTRL_WRITE_REQ);
                for (j = 0; j < 10; j++) {

                        val = CNIC_RD(dev, BNX2_CTX_HOST_PAGE_TBL_CTRL);
                        if (!(val & BNX2_CTX_HOST_PAGE_TBL_CTRL_WRITE_REQ))
                                break;
                        udelay(5);
                }
                if (val & BNX2_CTX_HOST_PAGE_TBL_CTRL_WRITE_REQ) {
                        ret = -EBUSY;
                        break;
                }
        }
        return ret;
}

static void cnic_free_irq(struct cnic_dev *dev)
{
        struct cnic_local *cp = dev->cnic_priv;
        struct cnic_eth_dev *ethdev = cp->ethdev;

        if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
                cp->disable_int_sync(dev);
                tasklet_disable(&cp->cnic_irq_task);
                free_irq(ethdev->irq_arr[0].vector, dev);
        }
}

static int cnic_init_bnx2_irq(struct cnic_dev *dev)
{
        struct cnic_local *cp = dev->cnic_priv;
        struct cnic_eth_dev *ethdev = cp->ethdev;

        if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
                int err, i = 0;
                int sblk_num = cp->status_blk_num;
                u32 base = ((sblk_num - 1) * BNX2_HC_SB_CONFIG_SIZE) +
                           BNX2_HC_SB_CONFIG_1;

                CNIC_WR(dev, base, BNX2_HC_SB_CONFIG_1_ONE_SHOT);

                CNIC_WR(dev, base + BNX2_HC_COMP_PROD_TRIP_OFF, (2 << 16) | 8);
                CNIC_WR(dev, base + BNX2_HC_COM_TICKS_OFF, (64 << 16) | 220);
                CNIC_WR(dev, base + BNX2_HC_CMD_TICKS_OFF, (64 << 16) | 220);

                cp->bnx2_status_blk = cp->status_blk;
                cp->last_status_idx = cp->bnx2_status_blk->status_idx;
                tasklet_init(&cp->cnic_irq_task, &cnic_service_bnx2_msix,
                             (unsigned long) dev);
                err = request_irq(ethdev->irq_arr[0].vector, cnic_irq, 0,
                                  "cnic", dev);
                if (err) {
                        tasklet_disable(&cp->cnic_irq_task);
                        return err;
                }
                while (cp->bnx2_status_blk->status_completion_producer_index &&
                       i < 10) {
                        CNIC_WR(dev, BNX2_HC_COALESCE_NOW,
                                1 << (11 + sblk_num));
                        udelay(10);
                        i++;
                        barrier();
                }
                if (cp->bnx2_status_blk->status_completion_producer_index) {
                        cnic_free_irq(dev);
                        goto failed;
                }

        } else {
                struct status_block *sblk = cp->status_blk;
                u32 hc_cmd = CNIC_RD(dev, BNX2_HC_COMMAND);
                int i = 0;

                while (sblk->status_completion_producer_index && i < 10) {
                        CNIC_WR(dev, BNX2_HC_COMMAND,
                                hc_cmd | BNX2_HC_COMMAND_COAL_NOW_WO_INT);
                        udelay(10);
                        i++;
                        barrier();
                }
                if (sblk->status_completion_producer_index)
                        goto failed;

        }
        return 0;

failed:
        printk(KERN_ERR PFX "%s: " "KCQ index not resetting to 0.\n",
               dev->netdev->name);
        return -EBUSY;
}

static void cnic_enable_bnx2_int(struct cnic_dev *dev)
{
        struct cnic_local *cp = dev->cnic_priv;
        struct cnic_eth_dev *ethdev = cp->ethdev;

        if (!(ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX))
                return;

        CNIC_WR(dev, BNX2_PCICFG_INT_ACK_CMD, cp->int_num |
                BNX2_PCICFG_INT_ACK_CMD_INDEX_VALID | cp->last_status_idx);
}

static void cnic_disable_bnx2_int_sync(struct cnic_dev *dev)
{
        struct cnic_local *cp = dev->cnic_priv;
        struct cnic_eth_dev *ethdev = cp->ethdev;

        if (!(ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX))
                return;

        CNIC_WR(dev, BNX2_PCICFG_INT_ACK_CMD, cp->int_num |
                BNX2_PCICFG_INT_ACK_CMD_MASK_INT);
        CNIC_RD(dev, BNX2_PCICFG_INT_ACK_CMD);
        synchronize_irq(ethdev->irq_arr[0].vector);
}

static void cnic_init_bnx2_tx_ring(struct cnic_dev *dev)
{
        struct cnic_local *cp = dev->cnic_priv;
        struct cnic_eth_dev *ethdev = cp->ethdev;
        u32 cid_addr, tx_cid, sb_id;
        u32 val, offset0, offset1, offset2, offset3;
        int i;
        struct tx_bd *txbd;
        dma_addr_t buf_map;
        struct status_block *s_blk = cp->status_blk;

        sb_id = cp->status_blk_num;
        tx_cid = 20;
        cnic_init_context(dev, tx_cid);
        cnic_init_context(dev, tx_cid + 1);
        cp->tx_cons_ptr = &s_blk->status_tx_quick_consumer_index2;
        if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
                struct status_block_msix *sblk = cp->status_blk;

                tx_cid = TX_TSS_CID + sb_id - 1;
                cnic_init_context(dev, tx_cid);
                CNIC_WR(dev, BNX2_TSCH_TSS_CFG, (sb_id << 24) |
                        (TX_TSS_CID << 7));
                cp->tx_cons_ptr = &sblk->status_tx_quick_consumer_index;
        }
        cp->tx_cons = *cp->tx_cons_ptr;

        cid_addr = GET_CID_ADDR(tx_cid);
        if (CHIP_NUM(cp) == CHIP_NUM_5709) {
                u32 cid_addr2 = GET_CID_ADDR(tx_cid + 4) + 0x40;

                for (i = 0; i < PHY_CTX_SIZE; i += 4)
                        cnic_ctx_wr(dev, cid_addr2, i, 0);

                offset0 = BNX2_L2CTX_TYPE_XI;
                offset1 = BNX2_L2CTX_CMD_TYPE_XI;
                offset2 = BNX2_L2CTX_TBDR_BHADDR_HI_XI;
                offset3 = BNX2_L2CTX_TBDR_BHADDR_LO_XI;
        } else {
                offset0 = BNX2_L2CTX_TYPE;
                offset1 = BNX2_L2CTX_CMD_TYPE;
                offset2 = BNX2_L2CTX_TBDR_BHADDR_HI;
                offset3 = BNX2_L2CTX_TBDR_BHADDR_LO;
        }
        val = BNX2_L2CTX_TYPE_TYPE_L2 | BNX2_L2CTX_TYPE_SIZE_L2;
        cnic_ctx_wr(dev, cid_addr, offset0, val);

        val = BNX2_L2CTX_CMD_TYPE_TYPE_L2 | (8 << 16);
        cnic_ctx_wr(dev, cid_addr, offset1, val);

        txbd = (struct tx_bd *) cp->l2_ring;

        buf_map = cp->l2_buf_map;
        for (i = 0; i < MAX_TX_DESC_CNT; i++, txbd++) {
                txbd->tx_bd_haddr_hi = (u64) buf_map >> 32;
                txbd->tx_bd_haddr_lo = (u64) buf_map & 0xffffffff;
        }
        val = (u64) cp->l2_ring_map >> 32;
        cnic_ctx_wr(dev, cid_addr, offset2, val);
        txbd->tx_bd_haddr_hi = val;

        val = (u64) cp->l2_ring_map & 0xffffffff;
        cnic_ctx_wr(dev, cid_addr, offset3, val);
        txbd->tx_bd_haddr_lo = val;
}

static void cnic_init_bnx2_rx_ring(struct cnic_dev *dev)
{
        struct cnic_local *cp = dev->cnic_priv;
        struct cnic_eth_dev *ethdev = cp->ethdev;
        u32 cid_addr, sb_id, val, coal_reg, coal_val;
        int i;
        struct rx_bd *rxbd;
        struct status_block *s_blk = cp->status_blk;

        sb_id = cp->status_blk_num;
        cnic_init_context(dev, 2);
        cp->rx_cons_ptr = &s_blk->status_rx_quick_consumer_index2;
        coal_reg = BNX2_HC_COMMAND;
        coal_val = CNIC_RD(dev, coal_reg);
        if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
                struct status_block_msix *sblk = cp->status_blk;

                cp->rx_cons_ptr = &sblk->status_rx_quick_consumer_index;
                coal_reg = BNX2_HC_COALESCE_NOW;
                coal_val = 1 << (11 + sb_id);
        }
        i = 0;
        while (!(*cp->rx_cons_ptr != 0) && i < 10) {
                CNIC_WR(dev, coal_reg, coal_val);
                udelay(10);
                i++;
                barrier();
        }
        cp->rx_cons = *cp->rx_cons_ptr;

        cid_addr = GET_CID_ADDR(2);
        val = BNX2_L2CTX_CTX_TYPE_CTX_BD_CHN_TYPE_VALUE |
              BNX2_L2CTX_CTX_TYPE_SIZE_L2 | (0x02 << 8);
        cnic_ctx_wr(dev, cid_addr, BNX2_L2CTX_CTX_TYPE, val);

        if (sb_id == 0)
                val = 2 << BNX2_L2CTX_L2_STATUSB_NUM_SHIFT;
        else
                val = BNX2_L2CTX_L2_STATUSB_NUM(sb_id);
        cnic_ctx_wr(dev, cid_addr, BNX2_L2CTX_HOST_BDIDX, val);

        rxbd = (struct rx_bd *) (cp->l2_ring + BCM_PAGE_SIZE);
        for (i = 0; i < MAX_RX_DESC_CNT; i++, rxbd++) {
                dma_addr_t buf_map;
                int n = (i % cp->l2_rx_ring_size) + 1;

                buf_map = cp->l2_buf_map + (n * cp->l2_single_buf_size);
                rxbd->rx_bd_len = cp->l2_single_buf_size;
                rxbd->rx_bd_flags = RX_BD_FLAGS_START | RX_BD_FLAGS_END;
                rxbd->rx_bd_haddr_hi = (u64) buf_map >> 32;
                rxbd->rx_bd_haddr_lo = (u64) buf_map & 0xffffffff;
        }
        val = (u64) (cp->l2_ring_map + BCM_PAGE_SIZE) >> 32;
        cnic_ctx_wr(dev, cid_addr, BNX2_L2CTX_NX_BDHADDR_HI, val);
        rxbd->rx_bd_haddr_hi = val;

        val = (u64) (cp->l2_ring_map + BCM_PAGE_SIZE) & 0xffffffff;
        cnic_ctx_wr(dev, cid_addr, BNX2_L2CTX_NX_BDHADDR_LO, val);
        rxbd->rx_bd_haddr_lo = val;

        val = cnic_reg_rd_ind(dev, BNX2_RXP_SCRATCH_RXP_FLOOD);
        cnic_reg_wr_ind(dev, BNX2_RXP_SCRATCH_RXP_FLOOD, val | (1 << 2));
}

static void cnic_shutdown_bnx2_rx_ring(struct cnic_dev *dev)
{
        struct kwqe *wqes[1], l2kwqe;

        memset(&l2kwqe, 0, sizeof(l2kwqe));
        wqes[0] = &l2kwqe;
        l2kwqe.kwqe_op_flag = (L2_LAYER_CODE << KWQE_FLAGS_LAYER_SHIFT) |
                              (L2_KWQE_OPCODE_VALUE_FLUSH <<
                               KWQE_OPCODE_SHIFT) | 2;
        dev->submit_kwqes(dev, wqes, 1);
}

static void cnic_set_bnx2_mac(struct cnic_dev *dev)
{
        struct cnic_local *cp = dev->cnic_priv;
        u32 val;

        val = cp->func << 2;

        cp->shmem_base = cnic_reg_rd_ind(dev, BNX2_SHM_HDR_ADDR_0 + val);

        val = cnic_reg_rd_ind(dev, cp->shmem_base +
                              BNX2_PORT_HW_CFG_ISCSI_MAC_UPPER);
        dev->mac_addr[0] = (u8) (val >> 8);
        dev->mac_addr[1] = (u8) val;

        CNIC_WR(dev, BNX2_EMAC_MAC_MATCH4, val);

        val = cnic_reg_rd_ind(dev, cp->shmem_base +
                              BNX2_PORT_HW_CFG_ISCSI_MAC_LOWER);
        dev->mac_addr[2] = (u8) (val >> 24);
        dev->mac_addr[3] = (u8) (val >> 16);
        dev->mac_addr[4] = (u8) (val >> 8);
        dev->mac_addr[5] = (u8) val;

        CNIC_WR(dev, BNX2_EMAC_MAC_MATCH5, val);

        val = 4 | BNX2_RPM_SORT_USER2_BC_EN;
        if (CHIP_NUM(cp) != CHIP_NUM_5709)
                val |= BNX2_RPM_SORT_USER2_PROM_VLAN;

        CNIC_WR(dev, BNX2_RPM_SORT_USER2, 0x0);
        CNIC_WR(dev, BNX2_RPM_SORT_USER2, val);
        CNIC_WR(dev, BNX2_RPM_SORT_USER2, val | BNX2_RPM_SORT_USER2_ENA);
}

static int cnic_start_bnx2_hw(struct cnic_dev *dev)
{
        struct cnic_local *cp = dev->cnic_priv;
        struct cnic_eth_dev *ethdev = cp->ethdev;
        struct status_block *sblk = cp->status_blk;
        u32 val;
        int err;

        cnic_set_bnx2_mac(dev);

        val = CNIC_RD(dev, BNX2_MQ_CONFIG);
        val &= ~BNX2_MQ_CONFIG_KNL_BYP_BLK_SIZE;
        if (BCM_PAGE_BITS > 12)
                val |= (12 - 8)  << 4;
        else
                val |= (BCM_PAGE_BITS - 8)  << 4;

        CNIC_WR(dev, BNX2_MQ_CONFIG, val);

        CNIC_WR(dev, BNX2_HC_COMP_PROD_TRIP, (2 << 16) | 8);
        CNIC_WR(dev, BNX2_HC_COM_TICKS, (64 << 16) | 220);
        CNIC_WR(dev, BNX2_HC_CMD_TICKS, (64 << 16) | 220);

        err = cnic_setup_5709_context(dev, 1);
        if (err)
                return err;

        cnic_init_context(dev, KWQ_CID);
        cnic_init_context(dev, KCQ_CID);

        cp->kwq_cid_addr = GET_CID_ADDR(KWQ_CID);
        cp->kwq_io_addr = MB_GET_CID_ADDR(KWQ_CID) + L5_KRNLQ_HOST_QIDX;

        cp->max_kwq_idx = MAX_KWQ_IDX;
        cp->kwq_prod_idx = 0;
        cp->kwq_con_idx = 0;
        cp->cnic_local_flags |= CNIC_LCL_FL_KWQ_INIT;

        if (CHIP_NUM(cp) == CHIP_NUM_5706 || CHIP_NUM(cp) == CHIP_NUM_5708)
                cp->kwq_con_idx_ptr = &sblk->status_rx_quick_consumer_index15;
        else
                cp->kwq_con_idx_ptr = &sblk->status_cmd_consumer_index;

        /* Initialize the kernel work queue context. */
        val = KRNLQ_TYPE_TYPE_KRNLQ | KRNLQ_SIZE_TYPE_SIZE |
              (BCM_PAGE_BITS - 8) | KRNLQ_FLAGS_QE_SELF_SEQ;
        cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_TYPE, val);

        val = (BCM_PAGE_SIZE / sizeof(struct kwqe) - 1) << 16;
        cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_QE_SELF_SEQ_MAX, val);

        val = ((BCM_PAGE_SIZE / sizeof(struct kwqe)) << 16) | KWQ_PAGE_CNT;
        cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_PGTBL_NPAGES, val);

        val = (u32) ((u64) cp->kwq_info.pgtbl_map >> 32);
        cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_PGTBL_HADDR_HI, val);

        val = (u32) cp->kwq_info.pgtbl_map;
        cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_PGTBL_HADDR_LO, val);

        cp->kcq_cid_addr = GET_CID_ADDR(KCQ_CID);
        cp->kcq_io_addr = MB_GET_CID_ADDR(KCQ_CID) + L5_KRNLQ_HOST_QIDX;

        cp->kcq_prod_idx = 0;

        /* Initialize the kernel complete queue context. */
        val = KRNLQ_TYPE_TYPE_KRNLQ | KRNLQ_SIZE_TYPE_SIZE |
              (BCM_PAGE_BITS - 8) | KRNLQ_FLAGS_QE_SELF_SEQ;
        cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_TYPE, val);

        val = (BCM_PAGE_SIZE / sizeof(struct kcqe) - 1) << 16;
        cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_QE_SELF_SEQ_MAX, val);

        val = ((BCM_PAGE_SIZE / sizeof(struct kcqe)) << 16) | KCQ_PAGE_CNT;
        cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_PGTBL_NPAGES, val);

        val = (u32) ((u64) cp->kcq_info.pgtbl_map >> 32);
        cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_PGTBL_HADDR_HI, val);

        val = (u32) cp->kcq_info.pgtbl_map;
        cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_PGTBL_HADDR_LO, val);

        cp->int_num = 0;
        if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
                u32 sb_id = cp->status_blk_num;
                u32 sb = BNX2_L2CTX_L5_STATUSB_NUM(sb_id);

                cp->int_num = sb_id << BNX2_PCICFG_INT_ACK_CMD_INT_NUM_SHIFT;
                cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_HOST_QIDX, sb);
                cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_HOST_QIDX, sb);
        }

        /* Enable Commnad Scheduler notification when we write to the
         * host producer index of the kernel contexts. */
        CNIC_WR(dev, BNX2_MQ_KNL_CMD_MASK1, 2);

        /* Enable Command Scheduler notification when we write to either
         * the Send Queue or Receive Queue producer indexes of the kernel
         * bypass contexts. */
        CNIC_WR(dev, BNX2_MQ_KNL_BYP_CMD_MASK1, 7);
        CNIC_WR(dev, BNX2_MQ_KNL_BYP_WRITE_MASK1, 7);

        /* Notify COM when the driver post an application buffer. */
        CNIC_WR(dev, BNX2_MQ_KNL_RX_V2P_MASK2, 0x2000);

        /* Set the CP and COM doorbells.  These two processors polls the
         * doorbell for a non zero value before running.  This must be done
         * after setting up the kernel queue contexts. */
        cnic_reg_wr_ind(dev, BNX2_CP_SCRATCH + 0x20, 1);
        cnic_reg_wr_ind(dev, BNX2_COM_SCRATCH + 0x20, 1);

        cnic_init_bnx2_tx_ring(dev);
        cnic_init_bnx2_rx_ring(dev);

        err = cnic_init_bnx2_irq(dev);
        if (err) {
                printk(KERN_ERR PFX "%s: cnic_init_irq failed\n",
                       dev->netdev->name);
                cnic_reg_wr_ind(dev, BNX2_CP_SCRATCH + 0x20, 0);
                cnic_reg_wr_ind(dev, BNX2_COM_SCRATCH + 0x20, 0);
                return err;
        }

        return 0;
}

static int cnic_register_netdev(struct cnic_dev *dev)
{
        struct cnic_local *cp = dev->cnic_priv;
        struct cnic_eth_dev *ethdev = cp->ethdev;
        int err;

        if (!ethdev)
                return -ENODEV;

        if (ethdev->drv_state & CNIC_DRV_STATE_REGD)
                return 0;

        err = ethdev->drv_register_cnic(dev->netdev, cp->cnic_ops, dev);
        if (err)
                printk(KERN_ERR PFX "%s: register_cnic failed\n",
                       dev->netdev->name);

        return err;
}

static void cnic_unregister_netdev(struct cnic_dev *dev)
{
        struct cnic_local *cp = dev->cnic_priv;
        struct cnic_eth_dev *ethdev = cp->ethdev;

        if (!ethdev)
                return;

        ethdev->drv_unregister_cnic(dev->netdev);
}

static int cnic_start_hw(struct cnic_dev *dev)
{
        struct cnic_local *cp = dev->cnic_priv;
        struct cnic_eth_dev *ethdev = cp->ethdev;
        int err;

        if (test_bit(CNIC_F_CNIC_UP, &dev->flags))
                return -EALREADY;

        dev->regview = ethdev->io_base;
        cp->chip_id = ethdev->chip_id;
        pci_dev_get(dev->pcidev);
        cp->func = PCI_FUNC(dev->pcidev->devfn);
        cp->status_blk = ethdev->irq_arr[0].status_blk;
        cp->status_blk_num = ethdev->irq_arr[0].status_blk_num;

        err = cp->alloc_resc(dev);
        if (err) {
                printk(KERN_ERR PFX "%s: allocate resource failure\n",
                       dev->netdev->name);
                goto err1;
        }

        err = cp->start_hw(dev);
        if (err)
                goto err1;

        err = cnic_cm_open(dev);
        if (err)
                goto err1;

        set_bit(CNIC_F_CNIC_UP, &dev->flags);

        cp->enable_int(dev);

        return 0;

err1:
        cp->free_resc(dev);
        pci_dev_put(dev->pcidev);
        return err;
}

static void cnic_stop_bnx2_hw(struct cnic_dev *dev)
{
        cnic_disable_bnx2_int_sync(dev);

        cnic_reg_wr_ind(dev, BNX2_CP_SCRATCH + 0x20, 0);
        cnic_reg_wr_ind(dev, BNX2_COM_SCRATCH + 0x20, 0);

        cnic_init_context(dev, KWQ_CID);
        cnic_init_context(dev, KCQ_CID);

        cnic_setup_5709_context(dev, 0);
        cnic_free_irq(dev);

        cnic_free_resc(dev);
}

static void cnic_stop_hw(struct cnic_dev *dev)
{
        if (test_bit(CNIC_F_CNIC_UP, &dev->flags)) {
                struct cnic_local *cp = dev->cnic_priv;

                clear_bit(CNIC_F_CNIC_UP, &dev->flags);
                rcu_assign_pointer(cp->ulp_ops[CNIC_ULP_L4], NULL);
                synchronize_rcu();
                cnic_cm_shutdown(dev);
                cp->stop_hw(dev);
                pci_dev_put(dev->pcidev);
        }
}

static void cnic_free_dev(struct cnic_dev *dev)
{
        int i = 0;

        while ((atomic_read(&dev->ref_count) != 0) && i < 10) {
                msleep(100);
                i++;
        }
        if (atomic_read(&dev->ref_count) != 0)
                printk(KERN_ERR PFX "%s: Failed waiting for ref count to go"
                                    " to zero.\n", dev->netdev->name);

        printk(KERN_INFO PFX "Removed CNIC device: %s\n", dev->netdev->name);
        dev_put(dev->netdev);
        kfree(dev);
}

static struct cnic_dev *cnic_alloc_dev(struct net_device *dev,
                                       struct pci_dev *pdev)
{
        struct cnic_dev *cdev;
        struct cnic_local *cp;
        int alloc_size;

        alloc_size = sizeof(struct cnic_dev) + sizeof(struct cnic_local);

        cdev = kzalloc(alloc_size , GFP_KERNEL);
        if (cdev == NULL) {
                printk(KERN_ERR PFX "%s: allocate dev struct failure\n",
                       dev->name);
                return NULL;
        }

        cdev->netdev = dev;
        cdev->cnic_priv = (char *)cdev + sizeof(struct cnic_dev);
        cdev->register_device = cnic_register_device;
        cdev->unregister_device = cnic_unregister_device;
        cdev->iscsi_nl_msg_recv = cnic_iscsi_nl_msg_recv;

        cp = cdev->cnic_priv;
        cp->dev = cdev;
        cp->uio_dev = -1;
        cp->l2_single_buf_size = 0x400;
        cp->l2_rx_ring_size = 3;

        spin_lock_init(&cp->cnic_ulp_lock);

        printk(KERN_INFO PFX "Added CNIC device: %s\n", dev->name);

        return cdev;
}

static struct cnic_dev *init_bnx2_cnic(struct net_device *dev)
{
        struct pci_dev *pdev;
        struct cnic_dev *cdev;
        struct cnic_local *cp;
        struct cnic_eth_dev *ethdev = NULL;
        struct cnic_eth_dev *(*probe)(struct net_device *) = NULL;

        probe = symbol_get(bnx2_cnic_probe);
        if (probe) {
                ethdev = (*probe)(dev);
                symbol_put(bnx2_cnic_probe);
        }
        if (!ethdev)
                return NULL;

        pdev = ethdev->pdev;
        if (!pdev)
                return NULL;

        dev_hold(dev);
        pci_dev_get(pdev);
        if (pdev->device == PCI_DEVICE_ID_NX2_5709 ||
            pdev->device == PCI_DEVICE_ID_NX2_5709S) {
                u8 rev;

                pci_read_config_byte(pdev, PCI_REVISION_ID, &rev);
                if (rev < 0x10) {
                        pci_dev_put(pdev);
                        goto cnic_err;
                }
        }
        pci_dev_put(pdev);

        cdev = cnic_alloc_dev(dev, pdev);
        if (cdev == NULL)
                goto cnic_err;

        set_bit(CNIC_F_BNX2_CLASS, &cdev->flags);
        cdev->submit_kwqes = cnic_submit_bnx2_kwqes;

        cp = cdev->cnic_priv;
        cp->ethdev = ethdev;
        cdev->pcidev = pdev;

        cp->cnic_ops = &cnic_bnx2_ops;
        cp->start_hw = cnic_start_bnx2_hw;
        cp->stop_hw = cnic_stop_bnx2_hw;
        cp->setup_pgtbl = cnic_setup_page_tbl;
        cp->alloc_resc = cnic_alloc_bnx2_resc;
        cp->free_resc = cnic_free_resc;
        cp->start_cm = cnic_cm_init_bnx2_hw;
        cp->stop_cm = cnic_cm_stop_bnx2_hw;
        cp->enable_int = cnic_enable_bnx2_int;
        cp->disable_int_sync = cnic_disable_bnx2_int_sync;
        cp->close_conn = cnic_close_bnx2_conn;
        cp->next_idx = cnic_bnx2_next_idx;
        cp->hw_idx = cnic_bnx2_hw_idx;
        return cdev;

cnic_err:
        dev_put(dev);
        return NULL;
}

static struct cnic_dev *is_cnic_dev(struct net_device *dev)
{
        struct ethtool_drvinfo drvinfo;
        struct cnic_dev *cdev = NULL;

        if (dev->ethtool_ops && dev->ethtool_ops->get_drvinfo) {
                memset(&drvinfo, 0, sizeof(drvinfo));
                dev->ethtool_ops->get_drvinfo(dev, &drvinfo);

                if (!strcmp(drvinfo.driver, "bnx2"))
                        cdev = init_bnx2_cnic(dev);
                if (cdev) {
                        write_lock(&cnic_dev_lock);
                        list_add(&cdev->list, &cnic_dev_list);
                        write_unlock(&cnic_dev_lock);
                }
        }
        return cdev;
}

/**
 * netdev event handler
 */
static int cnic_netdev_event(struct notifier_block *this, unsigned long event,
                                                         void *ptr)
{
        struct net_device *netdev = ptr;
        struct cnic_dev *dev;
        int if_type;
        int new_dev = 0;

        dev = cnic_from_netdev(netdev);

        if (!dev && (event == NETDEV_REGISTER || event == NETDEV_UP)) {
                /* Check for the hot-plug device */
                dev = is_cnic_dev(netdev);
                if (dev) {
                        new_dev = 1;
                        cnic_hold(dev);
                }
        }
        if (dev) {
                struct cnic_local *cp = dev->cnic_priv;

                if (new_dev)
                        cnic_ulp_init(dev);
                else if (event == NETDEV_UNREGISTER)
                        cnic_ulp_exit(dev);

                if (event == NETDEV_UP) {
                        if (cnic_register_netdev(dev) != 0) {
                                cnic_put(dev);
                                goto done;
                        }
                        if (!cnic_start_hw(dev))
                                cnic_ulp_start(dev);
                }

                rcu_read_lock();
                for (if_type = 0; if_type < MAX_CNIC_ULP_TYPE; if_type++) {
                        struct cnic_ulp_ops *ulp_ops;
                        void *ctx;

                        ulp_ops = rcu_dereference(cp->ulp_ops[if_type]);
                        if (!ulp_ops || !ulp_ops->indicate_netevent)
                                continue;

                        ctx = cp->ulp_handle[if_type];

                        ulp_ops->indicate_netevent(ctx, event);
                }
                rcu_read_unlock();

                if (event == NETDEV_GOING_DOWN) {
                        cnic_ulp_stop(dev);
                        cnic_stop_hw(dev);
                        cnic_unregister_netdev(dev);
                } else if (event == NETDEV_UNREGISTER) {
                        write_lock(&cnic_dev_lock);
                        list_del_init(&dev->list);
                        write_unlock(&cnic_dev_lock);

                        cnic_put(dev);
                        cnic_free_dev(dev);
                        goto done;
                }
                cnic_put(dev);
        }
done:
        return NOTIFY_DONE;
}

static struct notifier_block cnic_netdev_notifier = {
        .notifier_call = cnic_netdev_event
};

static void cnic_release(void)
{
        struct cnic_dev *dev;

        while (!list_empty(&cnic_dev_list)) {
                dev = list_entry(cnic_dev_list.next, struct cnic_dev, list);
                if (test_bit(CNIC_F_CNIC_UP, &dev->flags)) {
                        cnic_ulp_stop(dev);
                        cnic_stop_hw(dev);
                }

                cnic_ulp_exit(dev);
                cnic_unregister_netdev(dev);
                list_del_init(&dev->list);
                cnic_free_dev(dev);
        }
}

static int __init cnic_init(void)
{
        int rc = 0;

        printk(KERN_INFO "%s", version);

        rc = register_netdevice_notifier(&cnic_netdev_notifier);
        if (rc) {
                cnic_release();
                return rc;
        }

        return 0;
}

static void __exit cnic_exit(void)
{
        unregister_netdevice_notifier(&cnic_netdev_notifier);
        cnic_release();
        return;
}

module_init(cnic_init);
module_exit(cnic_exit);