/*
 * Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved.
 * Copyright (c) 2007, 2008 Mellanox Technologies. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/netdevice.h>
#include <linux/inetdevice.h>
#include <linux/rtnetlink.h>
#include <linux/if_vlan.h>
#include <net/ipv6.h>
#include <net/addrconf.h>

#include <rdma/ib_smi.h>
#include <rdma/ib_user_verbs.h>
#include <rdma/ib_addr.h>

#include <linux/mlx4/driver.h>
#include <linux/mlx4/cmd.h>
#include <linux/mlx4/qp.h>

#include "mlx4_ib.h"
#include "user.h"

#define DRV_NAME        MLX4_IB_DRV_NAME
#define DRV_VERSION     "2.2-1"
#define DRV_RELDATE     "Feb 2014"

#define MLX4_IB_FLOW_MAX_PRIO 0xFFF
#define MLX4_IB_FLOW_QPN_MASK 0xFFFFFF
#define MLX4_IB_CARD_REV_A0   0xA0

MODULE_AUTHOR("Roland Dreier");
MODULE_DESCRIPTION("Mellanox ConnectX HCA InfiniBand driver");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_VERSION(DRV_VERSION);

int mlx4_ib_sm_guid_assign = 0;
module_param_named(sm_guid_assign, mlx4_ib_sm_guid_assign, int, 0444);
MODULE_PARM_DESC(sm_guid_assign, "Enable SM alias_GUID assignment if sm_guid_assign > 0 (Default: 0)");

static const char mlx4_ib_version[] =
        DRV_NAME ": Mellanox ConnectX InfiniBand driver v"
        DRV_VERSION " (" DRV_RELDATE ")\n";

struct update_gid_work {
        struct work_struct      work;
        union ib_gid            gids[128];
        struct mlx4_ib_dev     *dev;
        int                     port;
};

static void do_slave_init(struct mlx4_ib_dev *ibdev, int slave, int do_init);

static struct workqueue_struct *wq;

static void init_query_mad(struct ib_smp *mad)
{
        mad->base_version  = 1;
        mad->mgmt_class    = IB_MGMT_CLASS_SUBN_LID_ROUTED;
        mad->class_version = 1;
        mad->method        = IB_MGMT_METHOD_GET;
}

static union ib_gid zgid;

static int check_flow_steering_support(struct mlx4_dev *dev)
{
        int eth_num_ports = 0;
        int ib_num_ports = 0;

        int dmfs = dev->caps.steering_mode == MLX4_STEERING_MODE_DEVICE_MANAGED;

        if (dmfs) {
                int i;
                mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
                        eth_num_ports++;
                mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_IB)
                        ib_num_ports++;
                dmfs &= (!ib_num_ports ||
                         (dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_DMFS_IPOIB)) &&
                        (!eth_num_ports ||
                         (dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_FS_EN));
                if (ib_num_ports && mlx4_is_mfunc(dev)) {
                        pr_warn("Device managed flow steering is unavailable for IB port in multifunction env.\n");
                        dmfs = 0;
                }
        }
        return dmfs;
}

static int num_ib_ports(struct mlx4_dev *dev)
{
        int ib_ports = 0;
        int i;

        mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_IB)
                ib_ports++;

        return ib_ports;
}

static int mlx4_ib_query_device(struct ib_device *ibdev,
                                struct ib_device_attr *props)
{
        struct mlx4_ib_dev *dev = to_mdev(ibdev);
        struct ib_smp *in_mad  = NULL;
        struct ib_smp *out_mad = NULL;
        int err = -ENOMEM;
        int have_ib_ports;

        in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
        out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
        if (!in_mad || !out_mad)
                goto out;

        init_query_mad(in_mad);
        in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;

        err = mlx4_MAD_IFC(to_mdev(ibdev), MLX4_MAD_IFC_IGNORE_KEYS,
                           1, NULL, NULL, in_mad, out_mad);
        if (err)
                goto out;

        memset(props, 0, sizeof *props);

        have_ib_ports = num_ib_ports(dev->dev);

        props->fw_ver = dev->dev->caps.fw_ver;
        props->device_cap_flags    = IB_DEVICE_CHANGE_PHY_PORT |
                IB_DEVICE_PORT_ACTIVE_EVENT             |
                IB_DEVICE_SYS_IMAGE_GUID                |
                IB_DEVICE_RC_RNR_NAK_GEN                |
                IB_DEVICE_BLOCK_MULTICAST_LOOPBACK;
        if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_BAD_PKEY_CNTR)
                props->device_cap_flags |= IB_DEVICE_BAD_PKEY_CNTR;
        if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_BAD_QKEY_CNTR)
                props->device_cap_flags |= IB_DEVICE_BAD_QKEY_CNTR;
        if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_APM && have_ib_ports)
                props->device_cap_flags |= IB_DEVICE_AUTO_PATH_MIG;
        if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_UD_AV_PORT)
                props->device_cap_flags |= IB_DEVICE_UD_AV_PORT_ENFORCE;
        if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_IPOIB_CSUM)
                props->device_cap_flags |= IB_DEVICE_UD_IP_CSUM;
        if (dev->dev->caps.max_gso_sz &&
            (dev->dev->rev_id != MLX4_IB_CARD_REV_A0) &&
            (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_BLH))
                props->device_cap_flags |= IB_DEVICE_UD_TSO;
        if (dev->dev->caps.bmme_flags & MLX4_BMME_FLAG_RESERVED_LKEY)
                props->device_cap_flags |= IB_DEVICE_LOCAL_DMA_LKEY;
        if ((dev->dev->caps.bmme_flags & MLX4_BMME_FLAG_LOCAL_INV) &&
            (dev->dev->caps.bmme_flags & MLX4_BMME_FLAG_REMOTE_INV) &&
            (dev->dev->caps.bmme_flags & MLX4_BMME_FLAG_FAST_REG_WR))
                props->device_cap_flags |= IB_DEVICE_MEM_MGT_EXTENSIONS;
        if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_XRC)
                props->device_cap_flags |= IB_DEVICE_XRC;
        if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_MEM_WINDOW)
                props->device_cap_flags |= IB_DEVICE_MEM_WINDOW;
        if (dev->dev->caps.bmme_flags & MLX4_BMME_FLAG_TYPE_2_WIN) {
                if (dev->dev->caps.bmme_flags & MLX4_BMME_FLAG_WIN_TYPE_2B)
                        props->device_cap_flags |= IB_DEVICE_MEM_WINDOW_TYPE_2B;
                else
                        props->device_cap_flags |= IB_DEVICE_MEM_WINDOW_TYPE_2A;
        if (dev->steering_support ==  MLX4_STEERING_MODE_DEVICE_MANAGED)
                props->device_cap_flags |= IB_DEVICE_MANAGED_FLOW_STEERING;
        }

        props->vendor_id           = be32_to_cpup((__be32 *) (out_mad->data + 36)) &
                0xffffff;
        props->vendor_part_id      = dev->dev->persist->pdev->device;
        props->hw_ver              = be32_to_cpup((__be32 *) (out_mad->data + 32));
        memcpy(&props->sys_image_guid, out_mad->data +  4, 8);

        props->max_mr_size         = ~0ull;
        props->page_size_cap       = dev->dev->caps.page_size_cap;
        props->max_qp              = dev->dev->quotas.qp;
        props->max_qp_wr           = dev->dev->caps.max_wqes - MLX4_IB_SQ_MAX_SPARE;
        props->max_sge             = min(dev->dev->caps.max_sq_sg,
                                         dev->dev->caps.max_rq_sg);
        props->max_cq              = dev->dev->quotas.cq;
        props->max_cqe             = dev->dev->caps.max_cqes;
        props->max_mr              = dev->dev->quotas.mpt;
        props->max_pd              = dev->dev->caps.num_pds - dev->dev->caps.reserved_pds;
        props->max_qp_rd_atom      = dev->dev->caps.max_qp_dest_rdma;
        props->max_qp_init_rd_atom = dev->dev->caps.max_qp_init_rdma;
        props->max_res_rd_atom     = props->max_qp_rd_atom * props->max_qp;
        props->max_srq             = dev->dev->quotas.srq;
        props->max_srq_wr          = dev->dev->caps.max_srq_wqes - 1;
        props->max_srq_sge         = dev->dev->caps.max_srq_sge;
        props->max_fast_reg_page_list_len = MLX4_MAX_FAST_REG_PAGES;
        props->local_ca_ack_delay  = dev->dev->caps.local_ca_ack_delay;
        props->atomic_cap          = dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_ATOMIC ?
                IB_ATOMIC_HCA : IB_ATOMIC_NONE;
        props->masked_atomic_cap   = props->atomic_cap;
        props->max_pkeys           = dev->dev->caps.pkey_table_len[1];
        props->max_mcast_grp       = dev->dev->caps.num_mgms + dev->dev->caps.num_amgms;
        props->max_mcast_qp_attach = dev->dev->caps.num_qp_per_mgm;
        props->max_total_mcast_qp_attach = props->max_mcast_qp_attach *
                                           props->max_mcast_grp;
        props->max_map_per_fmr = dev->dev->caps.max_fmr_maps;

out:
        kfree(in_mad);
        kfree(out_mad);

        return err;
}

static enum rdma_link_layer
mlx4_ib_port_link_layer(struct ib_device *device, u8 port_num)
{
        struct mlx4_dev *dev = to_mdev(device)->dev;

        return dev->caps.port_mask[port_num] == MLX4_PORT_TYPE_IB ?
                IB_LINK_LAYER_INFINIBAND : IB_LINK_LAYER_ETHERNET;
}

static int ib_link_query_port(struct ib_device *ibdev, u8 port,
                              struct ib_port_attr *props, int netw_view)
{
        struct ib_smp *in_mad  = NULL;
        struct ib_smp *out_mad = NULL;
        int ext_active_speed;
        int mad_ifc_flags = MLX4_MAD_IFC_IGNORE_KEYS;
        int err = -ENOMEM;

        in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
        out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
        if (!in_mad || !out_mad)
                goto out;

        init_query_mad(in_mad);
        in_mad->attr_id  = IB_SMP_ATTR_PORT_INFO;
        in_mad->attr_mod = cpu_to_be32(port);

        if (mlx4_is_mfunc(to_mdev(ibdev)->dev) && netw_view)
                mad_ifc_flags |= MLX4_MAD_IFC_NET_VIEW;

        err = mlx4_MAD_IFC(to_mdev(ibdev), mad_ifc_flags, port, NULL, NULL,
                                in_mad, out_mad);
        if (err)
                goto out;


        props->lid              = be16_to_cpup((__be16 *) (out_mad->data + 16));
        props->lmc              = out_mad->data[34] & 0x7;
        props->sm_lid           = be16_to_cpup((__be16 *) (out_mad->data + 18));
        props->sm_sl            = out_mad->data[36] & 0xf;
        props->state            = out_mad->data[32] & 0xf;
        props->phys_state       = out_mad->data[33] >> 4;
        props->port_cap_flags   = be32_to_cpup((__be32 *) (out_mad->data + 20));
        if (netw_view)
                props->gid_tbl_len = out_mad->data[50];
        else
                props->gid_tbl_len = to_mdev(ibdev)->dev->caps.gid_table_len[port];
        props->max_msg_sz       = to_mdev(ibdev)->dev->caps.max_msg_sz;
        props->pkey_tbl_len     = to_mdev(ibdev)->dev->caps.pkey_table_len[port];
        props->bad_pkey_cntr    = be16_to_cpup((__be16 *) (out_mad->data + 46));
        props->qkey_viol_cntr   = be16_to_cpup((__be16 *) (out_mad->data + 48));
        props->active_width     = out_mad->data[31] & 0xf;
        props->active_speed     = out_mad->data[35] >> 4;
        props->max_mtu          = out_mad->data[41] & 0xf;
        props->active_mtu       = out_mad->data[36] >> 4;
        props->subnet_timeout   = out_mad->data[51] & 0x1f;
        props->max_vl_num       = out_mad->data[37] >> 4;
        props->init_type_reply  = out_mad->data[41] >> 4;

        /* Check if extended speeds (EDR/FDR/...) are supported */
        if (props->port_cap_flags & IB_PORT_EXTENDED_SPEEDS_SUP) {
                ext_active_speed = out_mad->data[62] >> 4;

                switch (ext_active_speed) {
                case 1:
                        props->active_speed = IB_SPEED_FDR;
                        break;
                case 2:
                        props->active_speed = IB_SPEED_EDR;
                        break;
                }
        }

        /* If reported active speed is QDR, check if is FDR-10 */
        if (props->active_speed == IB_SPEED_QDR) {
                init_query_mad(in_mad);
                in_mad->attr_id = MLX4_ATTR_EXTENDED_PORT_INFO;
                in_mad->attr_mod = cpu_to_be32(port);

                err = mlx4_MAD_IFC(to_mdev(ibdev), mad_ifc_flags, port,
                                   NULL, NULL, in_mad, out_mad);
                if (err)
                        goto out;

                /* Checking LinkSpeedActive for FDR-10 */
                if (out_mad->data[15] & 0x1)
                        props->active_speed = IB_SPEED_FDR10;
        }

        /* Avoid wrong speed value returned by FW if the IB link is down. */
        if (props->state == IB_PORT_DOWN)
                 props->active_speed = IB_SPEED_SDR;

out:
        kfree(in_mad);
        kfree(out_mad);
        return err;
}

static u8 state_to_phys_state(enum ib_port_state state)
{
        return state == IB_PORT_ACTIVE ? 5 : 3;
}

static int eth_link_query_port(struct ib_device *ibdev, u8 port,
                               struct ib_port_attr *props, int netw_view)
{

        struct mlx4_ib_dev *mdev = to_mdev(ibdev);
        struct mlx4_ib_iboe *iboe = &mdev->iboe;
        struct net_device *ndev;
        enum ib_mtu tmp;
        struct mlx4_cmd_mailbox *mailbox;
        int err = 0;
        int is_bonded = mlx4_is_bonded(mdev->dev);

        mailbox = mlx4_alloc_cmd_mailbox(mdev->dev);
        if (IS_ERR(mailbox))
                return PTR_ERR(mailbox);

        err = mlx4_cmd_box(mdev->dev, 0, mailbox->dma, port, 0,
                           MLX4_CMD_QUERY_PORT, MLX4_CMD_TIME_CLASS_B,
                           MLX4_CMD_WRAPPED);
        if (err)
                goto out;

        props->active_width     =  (((u8 *)mailbox->buf)[5] == 0x40) ?
                                                IB_WIDTH_4X : IB_WIDTH_1X;
        props->active_speed     = IB_SPEED_QDR;
        props->port_cap_flags   = IB_PORT_CM_SUP | IB_PORT_IP_BASED_GIDS;
        props->gid_tbl_len      = mdev->dev->caps.gid_table_len[port];
        props->max_msg_sz       = mdev->dev->caps.max_msg_sz;
        props->pkey_tbl_len     = 1;
        props->max_mtu          = IB_MTU_4096;
        props->max_vl_num       = 2;
        props->state            = IB_PORT_DOWN;
        props->phys_state       = state_to_phys_state(props->state);
        props->active_mtu       = IB_MTU_256;
        if (is_bonded)
                rtnl_lock(); /* required to get upper dev */
        spin_lock_bh(&iboe->lock);
        ndev = iboe->netdevs[port - 1];
        if (ndev && is_bonded)
                ndev = netdev_master_upper_dev_get(ndev);
        if (!ndev)
                goto out_unlock;

        tmp = iboe_get_mtu(ndev->mtu);
        props->active_mtu = tmp ? min(props->max_mtu, tmp) : IB_MTU_256;

        props->state            = (netif_running(ndev) && netif_carrier_ok(ndev)) ?
                                        IB_PORT_ACTIVE : IB_PORT_DOWN;
        props->phys_state       = state_to_phys_state(props->state);
out_unlock:
        spin_unlock_bh(&iboe->lock);
        if (is_bonded)
                rtnl_unlock();
out:
        mlx4_free_cmd_mailbox(mdev->dev, mailbox);
        return err;
}

int __mlx4_ib_query_port(struct ib_device *ibdev, u8 port,
                         struct ib_port_attr *props, int netw_view)
{
        int err;

        memset(props, 0, sizeof *props);

        err = mlx4_ib_port_link_layer(ibdev, port) == IB_LINK_LAYER_INFINIBAND ?
                ib_link_query_port(ibdev, port, props, netw_view) :
                                eth_link_query_port(ibdev, port, props, netw_view);

        return err;
}

static int mlx4_ib_query_port(struct ib_device *ibdev, u8 port,
                              struct ib_port_attr *props)
{
        /* returns host view */
        return __mlx4_ib_query_port(ibdev, port, props, 0);
}

int __mlx4_ib_query_gid(struct ib_device *ibdev, u8 port, int index,
                        union ib_gid *gid, int netw_view)
{
        struct ib_smp *in_mad  = NULL;
        struct ib_smp *out_mad = NULL;
        int err = -ENOMEM;
        struct mlx4_ib_dev *dev = to_mdev(ibdev);
        int clear = 0;
        int mad_ifc_flags = MLX4_MAD_IFC_IGNORE_KEYS;

        in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
        out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
        if (!in_mad || !out_mad)
                goto out;

        init_query_mad(in_mad);
        in_mad->attr_id  = IB_SMP_ATTR_PORT_INFO;
        in_mad->attr_mod = cpu_to_be32(port);

        if (mlx4_is_mfunc(dev->dev) && netw_view)
                mad_ifc_flags |= MLX4_MAD_IFC_NET_VIEW;

        err = mlx4_MAD_IFC(dev, mad_ifc_flags, port, NULL, NULL, in_mad, out_mad);
        if (err)
                goto out;

        memcpy(gid->raw, out_mad->data + 8, 8);

        if (mlx4_is_mfunc(dev->dev) && !netw_view) {
                if (index) {
                        /* For any index > 0, return the null guid */
                        err = 0;
                        clear = 1;
                        goto out;
                }
        }

        init_query_mad(in_mad);
        in_mad->attr_id  = IB_SMP_ATTR_GUID_INFO;
        in_mad->attr_mod = cpu_to_be32(index / 8);

        err = mlx4_MAD_IFC(dev, mad_ifc_flags, port,
                           NULL, NULL, in_mad, out_mad);
        if (err)
                goto out;

        memcpy(gid->raw + 8, out_mad->data + (index % 8) * 8, 8);

out:
        if (clear)
                memset(gid->raw + 8, 0, 8);
        kfree(in_mad);
        kfree(out_mad);
        return err;
}

static int iboe_query_gid(struct ib_device *ibdev, u8 port, int index,
                          union ib_gid *gid)
{
        struct mlx4_ib_dev *dev = to_mdev(ibdev);

        *gid = dev->iboe.gid_table[port - 1][index];

        return 0;
}

static int mlx4_ib_query_gid(struct ib_device *ibdev, u8 port, int index,
                             union ib_gid *gid)
{
        if (rdma_port_get_link_layer(ibdev, port) == IB_LINK_LAYER_INFINIBAND)
                return __mlx4_ib_query_gid(ibdev, port, index, gid, 0);
        else
                return iboe_query_gid(ibdev, port, index, gid);
}

int __mlx4_ib_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
                         u16 *pkey, int netw_view)
{
        struct ib_smp *in_mad  = NULL;
        struct ib_smp *out_mad = NULL;
        int mad_ifc_flags = MLX4_MAD_IFC_IGNORE_KEYS;
        int err = -ENOMEM;

        in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
        out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
        if (!in_mad || !out_mad)
                goto out;

        init_query_mad(in_mad);
        in_mad->attr_id  = IB_SMP_ATTR_PKEY_TABLE;
        in_mad->attr_mod = cpu_to_be32(index / 32);

        if (mlx4_is_mfunc(to_mdev(ibdev)->dev) && netw_view)
                mad_ifc_flags |= MLX4_MAD_IFC_NET_VIEW;

        err = mlx4_MAD_IFC(to_mdev(ibdev), mad_ifc_flags, port, NULL, NULL,
                           in_mad, out_mad);
        if (err)
                goto out;

        *pkey = be16_to_cpu(((__be16 *) out_mad->data)[index % 32]);

out:
        kfree(in_mad);
        kfree(out_mad);
        return err;
}

static int mlx4_ib_query_pkey(struct ib_device *ibdev, u8 port, u16 index, u16 *pkey)
{
        return __mlx4_ib_query_pkey(ibdev, port, index, pkey, 0);
}

static int mlx4_ib_modify_device(struct ib_device *ibdev, int mask,
                                 struct ib_device_modify *props)
{
        struct mlx4_cmd_mailbox *mailbox;
        unsigned long flags;

        if (mask & ~IB_DEVICE_MODIFY_NODE_DESC)
                return -EOPNOTSUPP;

        if (!(mask & IB_DEVICE_MODIFY_NODE_DESC))
                return 0;

        if (mlx4_is_slave(to_mdev(ibdev)->dev))
                return -EOPNOTSUPP;

        spin_lock_irqsave(&to_mdev(ibdev)->sm_lock, flags);
        memcpy(ibdev->node_desc, props->node_desc, 64);
        spin_unlock_irqrestore(&to_mdev(ibdev)->sm_lock, flags);

        /*
         * If possible, pass node desc to FW, so it can generate
         * a 144 trap.  If cmd fails, just ignore.
         */
        mailbox = mlx4_alloc_cmd_mailbox(to_mdev(ibdev)->dev);
        if (IS_ERR(mailbox))
                return 0;

        memcpy(mailbox->buf, props->node_desc, 64);
        mlx4_cmd(to_mdev(ibdev)->dev, mailbox->dma, 1, 0,
                 MLX4_CMD_SET_NODE, MLX4_CMD_TIME_CLASS_A, MLX4_CMD_NATIVE);

        mlx4_free_cmd_mailbox(to_mdev(ibdev)->dev, mailbox);

        return 0;
}

static int mlx4_ib_SET_PORT(struct mlx4_ib_dev *dev, u8 port, int reset_qkey_viols,
                            u32 cap_mask)
{
        struct mlx4_cmd_mailbox *mailbox;
        int err;

        mailbox = mlx4_alloc_cmd_mailbox(dev->dev);
        if (IS_ERR(mailbox))
                return PTR_ERR(mailbox);

        if (dev->dev->flags & MLX4_FLAG_OLD_PORT_CMDS) {
                *(u8 *) mailbox->buf         = !!reset_qkey_viols << 6;
                ((__be32 *) mailbox->buf)[2] = cpu_to_be32(cap_mask);
        } else {
                ((u8 *) mailbox->buf)[3]     = !!reset_qkey_viols;
                ((__be32 *) mailbox->buf)[1] = cpu_to_be32(cap_mask);
        }

        err = mlx4_cmd(dev->dev, mailbox->dma, port, MLX4_SET_PORT_IB_OPCODE,
                       MLX4_CMD_SET_PORT, MLX4_CMD_TIME_CLASS_B,
                       MLX4_CMD_WRAPPED);

        mlx4_free_cmd_mailbox(dev->dev, mailbox);
        return err;
}

static int mlx4_ib_modify_port(struct ib_device *ibdev, u8 port, int mask,
                               struct ib_port_modify *props)
{
        struct mlx4_ib_dev *mdev = to_mdev(ibdev);
        u8 is_eth = mdev->dev->caps.port_type[port] == MLX4_PORT_TYPE_ETH;
        struct ib_port_attr attr;
        u32 cap_mask;
        int err;

        /* return OK if this is RoCE. CM calls ib_modify_port() regardless
         * of whether port link layer is ETH or IB. For ETH ports, qkey
         * violations and port capabilities are not meaningful.
         */
        if (is_eth)
                return 0;

        mutex_lock(&mdev->cap_mask_mutex);

        err = mlx4_ib_query_port(ibdev, port, &attr);
        if (err)
                goto out;

        cap_mask = (attr.port_cap_flags | props->set_port_cap_mask) &
                ~props->clr_port_cap_mask;

        err = mlx4_ib_SET_PORT(mdev, port,
                               !!(mask & IB_PORT_RESET_QKEY_CNTR),
                               cap_mask);

out:
        mutex_unlock(&to_mdev(ibdev)->cap_mask_mutex);
        return err;
}

static struct ib_ucontext *mlx4_ib_alloc_ucontext(struct ib_device *ibdev,
                                                  struct ib_udata *udata)
{
        struct mlx4_ib_dev *dev = to_mdev(ibdev);
        struct mlx4_ib_ucontext *context;
        struct mlx4_ib_alloc_ucontext_resp_v3 resp_v3;
        struct mlx4_ib_alloc_ucontext_resp resp;
        int err;

        if (!dev->ib_active)
                return ERR_PTR(-EAGAIN);

        if (ibdev->uverbs_abi_ver == MLX4_IB_UVERBS_NO_DEV_CAPS_ABI_VERSION) {
                resp_v3.qp_tab_size      = dev->dev->caps.num_qps;
                resp_v3.bf_reg_size      = dev->dev->caps.bf_reg_size;
                resp_v3.bf_regs_per_page = dev->dev->caps.bf_regs_per_page;
        } else {
                resp.dev_caps         = dev->dev->caps.userspace_caps;
                resp.qp_tab_size      = dev->dev->caps.num_qps;
                resp.bf_reg_size      = dev->dev->caps.bf_reg_size;
                resp.bf_regs_per_page = dev->dev->caps.bf_regs_per_page;
                resp.cqe_size         = dev->dev->caps.cqe_size;
        }

        context = kmalloc(sizeof *context, GFP_KERNEL);
        if (!context)
                return ERR_PTR(-ENOMEM);

        err = mlx4_uar_alloc(to_mdev(ibdev)->dev, &context->uar);
        if (err) {
                kfree(context);
                return ERR_PTR(err);
        }

        INIT_LIST_HEAD(&context->db_page_list);
        mutex_init(&context->db_page_mutex);

        if (ibdev->uverbs_abi_ver == MLX4_IB_UVERBS_NO_DEV_CAPS_ABI_VERSION)
                err = ib_copy_to_udata(udata, &resp_v3, sizeof(resp_v3));
        else
                err = ib_copy_to_udata(udata, &resp, sizeof(resp));

        if (err) {
                mlx4_uar_free(to_mdev(ibdev)->dev, &context->uar);
                kfree(context);
                return ERR_PTR(-EFAULT);
        }

        return &context->ibucontext;
}

static int mlx4_ib_dealloc_ucontext(struct ib_ucontext *ibcontext)
{
        struct mlx4_ib_ucontext *context = to_mucontext(ibcontext);

        mlx4_uar_free(to_mdev(ibcontext->device)->dev, &context->uar);
        kfree(context);

        return 0;
}

static int mlx4_ib_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
{
        struct mlx4_ib_dev *dev = to_mdev(context->device);

        if (vma->vm_end - vma->vm_start != PAGE_SIZE)
                return -EINVAL;

        if (vma->vm_pgoff == 0) {
                vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);

                if (io_remap_pfn_range(vma, vma->vm_start,
                                       to_mucontext(context)->uar.pfn,
                                       PAGE_SIZE, vma->vm_page_prot))
                        return -EAGAIN;
        } else if (vma->vm_pgoff == 1 && dev->dev->caps.bf_reg_size != 0) {
                vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);

                if (io_remap_pfn_range(vma, vma->vm_start,
                                       to_mucontext(context)->uar.pfn +
                                       dev->dev->caps.num_uars,
                                       PAGE_SIZE, vma->vm_page_prot))
                        return -EAGAIN;
        } else
                return -EINVAL;

        return 0;
}

static struct ib_pd *mlx4_ib_alloc_pd(struct ib_device *ibdev,
                                      struct ib_ucontext *context,
                                      struct ib_udata *udata)
{
        struct mlx4_ib_pd *pd;
        int err;

        pd = kmalloc(sizeof *pd, GFP_KERNEL);
        if (!pd)
                return ERR_PTR(-ENOMEM);

        err = mlx4_pd_alloc(to_mdev(ibdev)->dev, &pd->pdn);
        if (err) {
                kfree(pd);
                return ERR_PTR(err);
        }

        if (context)
                if (ib_copy_to_udata(udata, &pd->pdn, sizeof (__u32))) {
                        mlx4_pd_free(to_mdev(ibdev)->dev, pd->pdn);
                        kfree(pd);
                        return ERR_PTR(-EFAULT);
                }

        return &pd->ibpd;
}

static int mlx4_ib_dealloc_pd(struct ib_pd *pd)
{
        mlx4_pd_free(to_mdev(pd->device)->dev, to_mpd(pd)->pdn);
        kfree(pd);

        return 0;
}

static struct ib_xrcd *mlx4_ib_alloc_xrcd(struct ib_device *ibdev,
                                          struct ib_ucontext *context,
                                          struct ib_udata *udata)
{
        struct mlx4_ib_xrcd *xrcd;
        int err;

        if (!(to_mdev(ibdev)->dev->caps.flags & MLX4_DEV_CAP_FLAG_XRC))
                return ERR_PTR(-ENOSYS);

        xrcd = kmalloc(sizeof *xrcd, GFP_KERNEL);
        if (!xrcd)
                return ERR_PTR(-ENOMEM);

        err = mlx4_xrcd_alloc(to_mdev(ibdev)->dev, &xrcd->xrcdn);
        if (err)
                goto err1;

        xrcd->pd = ib_alloc_pd(ibdev);
        if (IS_ERR(xrcd->pd)) {
                err = PTR_ERR(xrcd->pd);
                goto err2;
        }

        xrcd->cq = ib_create_cq(ibdev, NULL, NULL, xrcd, 1, 0);
        if (IS_ERR(xrcd->cq)) {
                err = PTR_ERR(xrcd->cq);
                goto err3;
        }

        return &xrcd->ibxrcd;

err3:
        ib_dealloc_pd(xrcd->pd);
err2:
        mlx4_xrcd_free(to_mdev(ibdev)->dev, xrcd->xrcdn);
err1:
        kfree(xrcd);
        return ERR_PTR(err);
}

static int mlx4_ib_dealloc_xrcd(struct ib_xrcd *xrcd)
{
        ib_destroy_cq(to_mxrcd(xrcd)->cq);
        ib_dealloc_pd(to_mxrcd(xrcd)->pd);
        mlx4_xrcd_free(to_mdev(xrcd->device)->dev, to_mxrcd(xrcd)->xrcdn);
        kfree(xrcd);

        return 0;
}

static int add_gid_entry(struct ib_qp *ibqp, union ib_gid *gid)
{
        struct mlx4_ib_qp *mqp = to_mqp(ibqp);
        struct mlx4_ib_dev *mdev = to_mdev(ibqp->device);
        struct mlx4_ib_gid_entry *ge;

        ge = kzalloc(sizeof *ge, GFP_KERNEL);
        if (!ge)
                return -ENOMEM;

        ge->gid = *gid;
        if (mlx4_ib_add_mc(mdev, mqp, gid)) {
                ge->port = mqp->port;
                ge->added = 1;
        }

        mutex_lock(&mqp->mutex);
        list_add_tail(&ge->list, &mqp->gid_list);
        mutex_unlock(&mqp->mutex);

        return 0;
}

int mlx4_ib_add_mc(struct mlx4_ib_dev *mdev, struct mlx4_ib_qp *mqp,
                   union ib_gid *gid)
{
        struct net_device *ndev;
        int ret = 0;

        if (!mqp->port)
                return 0;

        spin_lock_bh(&mdev->iboe.lock);
        ndev = mdev->iboe.netdevs[mqp->port - 1];
        if (ndev)
                dev_hold(ndev);
        spin_unlock_bh(&mdev->iboe.lock);

        if (ndev) {
                ret = 1;
                dev_put(ndev);
        }

        return ret;
}

struct mlx4_ib_steering {
        struct list_head list;
        struct mlx4_flow_reg_id reg_id;
        union ib_gid gid;
};

static int parse_flow_attr(struct mlx4_dev *dev,
                           u32 qp_num,
                           union ib_flow_spec *ib_spec,
                           struct _rule_hw *mlx4_spec)
{
        enum mlx4_net_trans_rule_id type;

        switch (ib_spec->type) {
        case IB_FLOW_SPEC_ETH:
                type = MLX4_NET_TRANS_RULE_ID_ETH;
                memcpy(mlx4_spec->eth.dst_mac, ib_spec->eth.val.dst_mac,
                       ETH_ALEN);
                memcpy(mlx4_spec->eth.dst_mac_msk, ib_spec->eth.mask.dst_mac,
                       ETH_ALEN);
                mlx4_spec->eth.vlan_tag = ib_spec->eth.val.vlan_tag;
                mlx4_spec->eth.vlan_tag_msk = ib_spec->eth.mask.vlan_tag;
                break;
        case IB_FLOW_SPEC_IB:
                type = MLX4_NET_TRANS_RULE_ID_IB;
                mlx4_spec->ib.l3_qpn =
                        cpu_to_be32(qp_num);
                mlx4_spec->ib.qpn_mask =
                        cpu_to_be32(MLX4_IB_FLOW_QPN_MASK);
                break;


        case IB_FLOW_SPEC_IPV4:
                type = MLX4_NET_TRANS_RULE_ID_IPV4;
                mlx4_spec->ipv4.src_ip = ib_spec->ipv4.val.src_ip;
                mlx4_spec->ipv4.src_ip_msk = ib_spec->ipv4.mask.src_ip;
                mlx4_spec->ipv4.dst_ip = ib_spec->ipv4.val.dst_ip;
                mlx4_spec->ipv4.dst_ip_msk = ib_spec->ipv4.mask.dst_ip;
                break;

        case IB_FLOW_SPEC_TCP:
        case IB_FLOW_SPEC_UDP:
                type = ib_spec->type == IB_FLOW_SPEC_TCP ?
                                        MLX4_NET_TRANS_RULE_ID_TCP :
                                        MLX4_NET_TRANS_RULE_ID_UDP;
                mlx4_spec->tcp_udp.dst_port = ib_spec->tcp_udp.val.dst_port;
                mlx4_spec->tcp_udp.dst_port_msk = ib_spec->tcp_udp.mask.dst_port;
                mlx4_spec->tcp_udp.src_port = ib_spec->tcp_udp.val.src_port;
                mlx4_spec->tcp_udp.src_port_msk = ib_spec->tcp_udp.mask.src_port;
                break;

        default:
                return -EINVAL;
        }
        if (mlx4_map_sw_to_hw_steering_id(dev, type) < 0 ||
            mlx4_hw_rule_sz(dev, type) < 0)
                return -EINVAL;
        mlx4_spec->id = cpu_to_be16(mlx4_map_sw_to_hw_steering_id(dev, type));
        mlx4_spec->size = mlx4_hw_rule_sz(dev, type) >> 2;
        return mlx4_hw_rule_sz(dev, type);
}

struct default_rules {
        __u32 mandatory_fields[IB_FLOW_SPEC_SUPPORT_LAYERS];
        __u32 mandatory_not_fields[IB_FLOW_SPEC_SUPPORT_LAYERS];
        __u32 rules_create_list[IB_FLOW_SPEC_SUPPORT_LAYERS];
        __u8  link_layer;
};
static const struct default_rules default_table[] = {
        {
                .mandatory_fields = {IB_FLOW_SPEC_IPV4},
                .mandatory_not_fields = {IB_FLOW_SPEC_ETH},
                .rules_create_list = {IB_FLOW_SPEC_IB},
                .link_layer = IB_LINK_LAYER_INFINIBAND
        }
};

static int __mlx4_ib_default_rules_match(struct ib_qp *qp,
                                         struct ib_flow_attr *flow_attr)
{
        int i, j, k;
        void *ib_flow;
        const struct default_rules *pdefault_rules = default_table;
        u8 link_layer = rdma_port_get_link_layer(qp->device, flow_attr->port);

        for (i = 0; i < ARRAY_SIZE(default_table); i++, pdefault_rules++) {
                __u32 field_types[IB_FLOW_SPEC_SUPPORT_LAYERS];
                memset(&field_types, 0, sizeof(field_types));

                if (link_layer != pdefault_rules->link_layer)
                        continue;

                ib_flow = flow_attr + 1;
                /* we assume the specs are sorted */
                for (j = 0, k = 0; k < IB_FLOW_SPEC_SUPPORT_LAYERS &&
                     j < flow_attr->num_of_specs; k++) {
                        union ib_flow_spec *current_flow =
                                (union ib_flow_spec *)ib_flow;

                        /* same layer but different type */
                        if (((current_flow->type & IB_FLOW_SPEC_LAYER_MASK) ==
                             (pdefault_rules->mandatory_fields[k] &
                              IB_FLOW_SPEC_LAYER_MASK)) &&
                            (current_flow->type !=
                             pdefault_rules->mandatory_fields[k]))
                                goto out;

                        /* same layer, try match next one */
                        if (current_flow->type ==
                            pdefault_rules->mandatory_fields[k]) {
                                j++;
                                ib_flow +=
                                        ((union ib_flow_spec *)ib_flow)->size;
                        }
                }

                ib_flow = flow_attr + 1;
                for (j = 0; j < flow_attr->num_of_specs;
                     j++, ib_flow += ((union ib_flow_spec *)ib_flow)->size)
                        for (k = 0; k < IB_FLOW_SPEC_SUPPORT_LAYERS; k++)
                                /* same layer and same type */
                                if (((union ib_flow_spec *)ib_flow)->type ==
                                    pdefault_rules->mandatory_not_fields[k])
                                        goto out;

                return i;
        }
out:
        return -1;
}

static int __mlx4_ib_create_default_rules(
                struct mlx4_ib_dev *mdev,
                struct ib_qp *qp,
                const struct default_rules *pdefault_rules,
                struct _rule_hw *mlx4_spec) {
        int size = 0;
        int i;

        for (i = 0; i < ARRAY_SIZE(pdefault_rules->rules_create_list); i++) {
                int ret;
                union ib_flow_spec ib_spec;
                switch (pdefault_rules->rules_create_list[i]) {
                case 0:
                        /* no rule */
                        continue;
                case IB_FLOW_SPEC_IB:
                        ib_spec.type = IB_FLOW_SPEC_IB;

                        ib_spec.size = sizeof(struct ib_flow_spec_ib);

                        break;
                default:
                        /* invalid rule */
                        return -EINVAL;
                }
                /* We must put empty rule, qpn is being ignored */
                ret = parse_flow_attr(mdev->dev, 0, &ib_spec,
                                      mlx4_spec);
                if (ret < 0) {
                        pr_info("invalid parsing\n");
                        return -EINVAL;
                }

                mlx4_spec = (void *)mlx4_spec + ret;
                size += ret;
        }
        return size;
}

static int __mlx4_ib_create_flow(struct ib_qp *qp, struct ib_flow_attr *flow_attr,
                          int domain,
                          enum mlx4_net_trans_promisc_mode flow_type,
                          u64 *reg_id)
{
        int ret, i;
        int size = 0;
        void *ib_flow;
        struct mlx4_ib_dev *mdev = to_mdev(qp->device);
        struct mlx4_cmd_mailbox *mailbox;
        struct mlx4_net_trans_rule_hw_ctrl *ctrl;
        int default_flow;

        static const u16 __mlx4_domain[] = {
                [IB_FLOW_DOMAIN_USER] = MLX4_DOMAIN_UVERBS,
                [IB_FLOW_DOMAIN_ETHTOOL] = MLX4_DOMAIN_ETHTOOL,
                [IB_FLOW_DOMAIN_RFS] = MLX4_DOMAIN_RFS,
                [IB_FLOW_DOMAIN_NIC] = MLX4_DOMAIN_NIC,
        };

        if (flow_attr->priority > MLX4_IB_FLOW_MAX_PRIO) {
                pr_err("Invalid priority value %d\n", flow_attr->priority);
                return -EINVAL;
        }

        if (domain >= IB_FLOW_DOMAIN_NUM) {
                pr_err("Invalid domain value %d\n", domain);
                return -EINVAL;
        }

        if (mlx4_map_sw_to_hw_steering_mode(mdev->dev, flow_type) < 0)
                return -EINVAL;

        mailbox = mlx4_alloc_cmd_mailbox(mdev->dev);
        if (IS_ERR(mailbox))
                return PTR_ERR(mailbox);
        ctrl = mailbox->buf;

        ctrl->prio = cpu_to_be16(__mlx4_domain[domain] |
                                 flow_attr->priority);
        ctrl->type = mlx4_map_sw_to_hw_steering_mode(mdev->dev, flow_type);
        ctrl->port = flow_attr->port;
        ctrl->qpn = cpu_to_be32(qp->qp_num);

        ib_flow = flow_attr + 1;
        size += sizeof(struct mlx4_net_trans_rule_hw_ctrl);
        /* Add default flows */
        default_flow = __mlx4_ib_default_rules_match(qp, flow_attr);
        if (default_flow >= 0) {
                ret = __mlx4_ib_create_default_rules(
                                mdev, qp, default_table + default_flow,
                                mailbox->buf + size);
                if (ret < 0) {
                        mlx4_free_cmd_mailbox(mdev->dev, mailbox);
                        return -EINVAL;
                }
                size += ret;
        }
        for (i = 0; i < flow_attr->num_of_specs; i++) {
                ret = parse_flow_attr(mdev->dev, qp->qp_num, ib_flow,
                                      mailbox->buf + size);
                if (ret < 0) {
                        mlx4_free_cmd_mailbox(mdev->dev, mailbox);
                        return -EINVAL;
                }
                ib_flow += ((union ib_flow_spec *) ib_flow)->size;
                size += ret;
        }

        ret = mlx4_cmd_imm(mdev->dev, mailbox->dma, reg_id, size >> 2, 0,
                           MLX4_QP_FLOW_STEERING_ATTACH, MLX4_CMD_TIME_CLASS_A,
                           MLX4_CMD_NATIVE);
        if (ret == -ENOMEM)
                pr_err("mcg table is full. Fail to register network rule.\n");
        else if (ret == -ENXIO)
                pr_err("Device managed flow steering is disabled. Fail to register network rule.\n");
        else if (ret)
                pr_err("Invalid argumant. Fail to register network rule.\n");

        mlx4_free_cmd_mailbox(mdev->dev, mailbox);
        return ret;
}

static int __mlx4_ib_destroy_flow(struct mlx4_dev *dev, u64 reg_id)
{
        int err;
        err = mlx4_cmd(dev, reg_id, 0, 0,
                       MLX4_QP_FLOW_STEERING_DETACH, MLX4_CMD_TIME_CLASS_A,
                       MLX4_CMD_NATIVE);
        if (err)
                pr_err("Fail to detach network rule. registration id = 0x%llx\n",
                       reg_id);
        return err;
}

static int mlx4_ib_tunnel_steer_add(struct ib_qp *qp, struct ib_flow_attr *flow_attr,
                                    u64 *reg_id)
{
        void *ib_flow;
        union ib_flow_spec *ib_spec;
        struct mlx4_dev *dev = to_mdev(qp->device)->dev;
        int err = 0;

        if (dev->caps.tunnel_offload_mode != MLX4_TUNNEL_OFFLOAD_MODE_VXLAN ||
            dev->caps.dmfs_high_steer_mode == MLX4_STEERING_DMFS_A0_STATIC)
                return 0; /* do nothing */

        ib_flow = flow_attr + 1;
        ib_spec = (union ib_flow_spec *)ib_flow;

        if (ib_spec->type !=  IB_FLOW_SPEC_ETH || flow_attr->num_of_specs != 1)
                return 0; /* do nothing */

        err = mlx4_tunnel_steer_add(to_mdev(qp->device)->dev, ib_spec->eth.val.dst_mac,
                                    flow_attr->port, qp->qp_num,
                                    MLX4_DOMAIN_UVERBS | (flow_attr->priority & 0xff),
                                    reg_id);
        return err;
}

static struct ib_flow *mlx4_ib_create_flow(struct ib_qp *qp,
                                    struct ib_flow_attr *flow_attr,
                                    int domain)
{
        int err = 0, i = 0, j = 0;
        struct mlx4_ib_flow *mflow;
        enum mlx4_net_trans_promisc_mode type[2];
        struct mlx4_dev *dev = (to_mdev(qp->device))->dev;
        int is_bonded = mlx4_is_bonded(dev);

        memset(type, 0, sizeof(type));

        mflow = kzalloc(sizeof(*mflow), GFP_KERNEL);
        if (!mflow) {
                err = -ENOMEM;
                goto err_free;
        }

        switch (flow_attr->type) {
        case IB_FLOW_ATTR_NORMAL:
                type[0] = MLX4_FS_REGULAR;
                break;

        case IB_FLOW_ATTR_ALL_DEFAULT:
                type[0] = MLX4_FS_ALL_DEFAULT;
                break;

        case IB_FLOW_ATTR_MC_DEFAULT:
                type[0] = MLX4_FS_MC_DEFAULT;
                break;

        case IB_FLOW_ATTR_SNIFFER:
                type[0] = MLX4_FS_UC_SNIFFER;
                type[1] = MLX4_FS_MC_SNIFFER;
                break;

        default:
                err = -EINVAL;
                goto err_free;
        }

        while (i < ARRAY_SIZE(type) && type[i]) {
                err = __mlx4_ib_create_flow(qp, flow_attr, domain, type[i],
                                            &mflow->reg_id[i].id);
                if (err)
                        goto err_create_flow;
                i++;
                if (is_bonded) {
                        /* Application always sees one port so the mirror rule
                         * must be on port #2
                         */
                        flow_attr->port = 2;
                        err = __mlx4_ib_create_flow(qp, flow_attr,
                                                    domain, type[j],
                                                    &mflow->reg_id[j].mirror);
                        flow_attr->port = 1;
                        if (err)
                                goto err_create_flow;
                        j++;
                }

        }

        if (i < ARRAY_SIZE(type) && flow_attr->type == IB_FLOW_ATTR_NORMAL) {
                err = mlx4_ib_tunnel_steer_add(qp, flow_attr,
                                               &mflow->reg_id[i].id);
                if (err)
                        goto err_create_flow;
                i++;
                if (is_bonded) {
                        flow_attr->port = 2;
                        err = mlx4_ib_tunnel_steer_add(qp, flow_attr,
                                                       &mflow->reg_id[j].mirror);
                        flow_attr->port = 1;
                        if (err)
                                goto err_create_flow;
                        j++;
                }
                /* function to create mirror rule */
        }

        return &mflow->ibflow;

err_create_flow:
        while (i) {
                (void)__mlx4_ib_destroy_flow(to_mdev(qp->device)->dev,
                                             mflow->reg_id[i].id);
                i--;
        }

        while (j) {
                (void)__mlx4_ib_destroy_flow(to_mdev(qp->device)->dev,
                                             mflow->reg_id[j].mirror);
                j--;
        }
err_free:
        kfree(mflow);
        return ERR_PTR(err);
}

static int mlx4_ib_destroy_flow(struct ib_flow *flow_id)
{
        int err, ret = 0;
        int i = 0;
        struct mlx4_ib_dev *mdev = to_mdev(flow_id->qp->device);
        struct mlx4_ib_flow *mflow = to_mflow(flow_id);

        while (i < ARRAY_SIZE(mflow->reg_id) && mflow->reg_id[i].id) {
                err = __mlx4_ib_destroy_flow(mdev->dev, mflow->reg_id[i].id);
                if (err)
                        ret = err;
                if (mflow->reg_id[i].mirror) {
                        err = __mlx4_ib_destroy_flow(mdev->dev,
                                                     mflow->reg_id[i].mirror);
                        if (err)
                                ret = err;
                }
                i++;
        }

        kfree(mflow);
        return ret;
}

static int mlx4_ib_mcg_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
{
        int err;
        struct mlx4_ib_dev *mdev = to_mdev(ibqp->device);
        struct mlx4_dev *dev = mdev->dev;
        struct mlx4_ib_qp *mqp = to_mqp(ibqp);
        struct mlx4_ib_steering *ib_steering = NULL;
        enum mlx4_protocol prot = MLX4_PROT_IB_IPV6;
        struct mlx4_flow_reg_id reg_id;

        if (mdev->dev->caps.steering_mode ==
            MLX4_STEERING_MODE_DEVICE_MANAGED) {
                ib_steering = kmalloc(sizeof(*ib_steering), GFP_KERNEL);
                if (!ib_steering)
                        return -ENOMEM;
        }

        err = mlx4_multicast_attach(mdev->dev, &mqp->mqp, gid->raw, mqp->port,
                                    !!(mqp->flags &
                                       MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK),
                                    prot, &reg_id.id);
        if (err) {
                pr_err("multicast attach op failed, err %d\n", err);
                goto err_malloc;
        }

        reg_id.mirror = 0;
        if (mlx4_is_bonded(dev)) {
                err = mlx4_multicast_attach(mdev->dev, &mqp->mqp, gid->raw,
                                            (mqp->port == 1) ? 2 : 1,
                                            !!(mqp->flags &
                                            MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK),
                                            prot, &reg_id.mirror);
                if (err)
                        goto err_add;
        }

        err = add_gid_entry(ibqp, gid);
        if (err)
                goto err_add;

        if (ib_steering) {
                memcpy(ib_steering->gid.raw, gid->raw, 16);
                ib_steering->reg_id = reg_id;
                mutex_lock(&mqp->mutex);
                list_add(&ib_steering->list, &mqp->steering_rules);
                mutex_unlock(&mqp->mutex);
        }
        return 0;

err_add:
        mlx4_multicast_detach(mdev->dev, &mqp->mqp, gid->raw,
                              prot, reg_id.id);
        if (reg_id.mirror)
                mlx4_multicast_detach(mdev->dev, &mqp->mqp, gid->raw,
                                      prot, reg_id.mirror);
err_malloc:
        kfree(ib_steering);

        return err;
}

static struct mlx4_ib_gid_entry *find_gid_entry(struct mlx4_ib_qp *qp, u8 *raw)
{
        struct mlx4_ib_gid_entry *ge;
        struct mlx4_ib_gid_entry *tmp;
        struct mlx4_ib_gid_entry *ret = NULL;

        list_for_each_entry_safe(ge, tmp, &qp->gid_list, list) {
                if (!memcmp(raw, ge->gid.raw, 16)) {
                        ret = ge;
                        break;
                }
        }

        return ret;
}

static int mlx4_ib_mcg_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
{
        int err;
        struct mlx4_ib_dev *mdev = to_mdev(ibqp->device);
        struct mlx4_dev *dev = mdev->dev;
        struct mlx4_ib_qp *mqp = to_mqp(ibqp);
        struct net_device *ndev;
        struct mlx4_ib_gid_entry *ge;
        struct mlx4_flow_reg_id reg_id = {0, 0};
        enum mlx4_protocol prot =  MLX4_PROT_IB_IPV6;

        if (mdev->dev->caps.steering_mode ==
            MLX4_STEERING_MODE_DEVICE_MANAGED) {
                struct mlx4_ib_steering *ib_steering;

                mutex_lock(&mqp->mutex);
                list_for_each_entry(ib_steering, &mqp->steering_rules, list) {
                        if (!memcmp(ib_steering->gid.raw, gid->raw, 16)) {
                                list_del(&ib_steering->list);
                                break;
                        }
                }
                mutex_unlock(&mqp->mutex);
                if (&ib_steering->list == &mqp->steering_rules) {
                        pr_err("Couldn't find reg_id for mgid. Steering rule is left attached\n");
                        return -EINVAL;
                }
                reg_id = ib_steering->reg_id;
                kfree(ib_steering);
        }

        err = mlx4_multicast_detach(mdev->dev, &mqp->mqp, gid->raw,
                                    prot, reg_id.id);
        if (err)
                return err;

        if (mlx4_is_bonded(dev)) {
                err = mlx4_multicast_detach(mdev->dev, &mqp->mqp, gid->raw,
                                            prot, reg_id.mirror);
                if (err)
                        return err;
        }

        mutex_lock(&mqp->mutex);
        ge = find_gid_entry(mqp, gid->raw);
        if (ge) {
                spin_lock_bh(&mdev->iboe.lock);
                ndev = ge->added ? mdev->iboe.netdevs[ge->port - 1] : NULL;
                if (ndev)
                        dev_hold(ndev);
                spin_unlock_bh(&mdev->iboe.lock);
                if (ndev)
                        dev_put(ndev);
                list_del(&ge->list);
                kfree(ge);
        } else
                pr_warn("could not find mgid entry\n");

        mutex_unlock(&mqp->mutex);

        return 0;
}

static int init_node_data(struct mlx4_ib_dev *dev)
{
        struct ib_smp *in_mad  = NULL;
        struct ib_smp *out_mad = NULL;
        int mad_ifc_flags = MLX4_MAD_IFC_IGNORE_KEYS;
        int err = -ENOMEM;

        in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
        out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
        if (!in_mad || !out_mad)
                goto out;

        init_query_mad(in_mad);
        in_mad->attr_id = IB_SMP_ATTR_NODE_DESC;
        if (mlx4_is_master(dev->dev))
                mad_ifc_flags |= MLX4_MAD_IFC_NET_VIEW;

        err = mlx4_MAD_IFC(dev, mad_ifc_flags, 1, NULL, NULL, in_mad, out_mad);
        if (err)
                goto out;

        memcpy(dev->ib_dev.node_desc, out_mad->data, 64);

        in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;

        err = mlx4_MAD_IFC(dev, mad_ifc_flags, 1, NULL, NULL, in_mad, out_mad);
        if (err)
                goto out;

        dev->dev->rev_id = be32_to_cpup((__be32 *) (out_mad->data + 32));
        memcpy(&dev->ib_dev.node_guid, out_mad->data + 12, 8);

out:
        kfree(in_mad);
        kfree(out_mad);
        return err;
}

static ssize_t show_hca(struct device *device, struct device_attribute *attr,
                        char *buf)
{
        struct mlx4_ib_dev *dev =
                container_of(device, struct mlx4_ib_dev, ib_dev.dev);
        return sprintf(buf, "MT%d\n", dev->dev->persist->pdev->device);
}

static ssize_t show_fw_ver(struct device *device, struct device_attribute *attr,
                           char *buf)
{
        struct mlx4_ib_dev *dev =
                container_of(device, struct mlx4_ib_dev, ib_dev.dev);
        return sprintf(buf, "%d.%d.%d\n", (int) (dev->dev->caps.fw_ver >> 32),
                       (int) (dev->dev->caps.fw_ver >> 16) & 0xffff,
                       (int) dev->dev->caps.fw_ver & 0xffff);
}

static ssize_t show_rev(struct device *device, struct device_attribute *attr,
                        char *buf)
{
        struct mlx4_ib_dev *dev =
                container_of(device, struct mlx4_ib_dev, ib_dev.dev);
        return sprintf(buf, "%x\n", dev->dev->rev_id);
}

static ssize_t show_board(struct device *device, struct device_attribute *attr,
                          char *buf)
{
        struct mlx4_ib_dev *dev =
                container_of(device, struct mlx4_ib_dev, ib_dev.dev);
        return sprintf(buf, "%.*s\n", MLX4_BOARD_ID_LEN,
                       dev->dev->board_id);
}

static DEVICE_ATTR(hw_rev,   S_IRUGO, show_rev,    NULL);
static DEVICE_ATTR(fw_ver,   S_IRUGO, show_fw_ver, NULL);
static DEVICE_ATTR(hca_type, S_IRUGO, show_hca,    NULL);
static DEVICE_ATTR(board_id, S_IRUGO, show_board,  NULL);

static struct device_attribute *mlx4_class_attributes[] = {
        &dev_attr_hw_rev,
        &dev_attr_fw_ver,
        &dev_attr_hca_type,
        &dev_attr_board_id
};

static void mlx4_addrconf_ifid_eui48(u8 *eui, u16 vlan_id,
                                     struct net_device *dev)
{
        memcpy(eui, dev->dev_addr, 3);
        memcpy(eui + 5, dev->dev_addr + 3, 3);
        if (vlan_id < 0x1000) {
                eui[3] = vlan_id >> 8;
                eui[4] = vlan_id & 0xff;
        } else {
                eui[3] = 0xff;
                eui[4] = 0xfe;
        }
        eui[0] ^= 2;
}

static void update_gids_task(struct work_struct *work)
{
        struct update_gid_work *gw = container_of(work, struct update_gid_work, work);
        struct mlx4_cmd_mailbox *mailbox;
        union ib_gid *gids;
        int err;
        struct mlx4_dev *dev = gw->dev->dev;
        int is_bonded = mlx4_is_bonded(dev);

        if (!gw->dev->ib_active)
                return;

        mailbox = mlx4_alloc_cmd_mailbox(dev);
        if (IS_ERR(mailbox)) {
                pr_warn("update gid table failed %ld\n", PTR_ERR(mailbox));
                return;
        }

        gids = mailbox->buf;
        memcpy(gids, gw->gids, sizeof gw->gids);

        err = mlx4_cmd(dev, mailbox->dma, MLX4_SET_PORT_GID_TABLE << 8 | gw->port,
                       MLX4_SET_PORT_ETH_OPCODE, MLX4_CMD_SET_PORT,
                       MLX4_CMD_TIME_CLASS_B, MLX4_CMD_WRAPPED);
        if (err)
                pr_warn("set port command failed\n");
        else
                if ((gw->port == 1) || !is_bonded)
                        mlx4_ib_dispatch_event(gw->dev,
                                               is_bonded ? 1 : gw->port,
                                               IB_EVENT_GID_CHANGE);

        mlx4_free_cmd_mailbox(dev, mailbox);
        kfree(gw);
}

static void reset_gids_task(struct work_struct *work)
{
        struct update_gid_work *gw =
                        container_of(work, struct update_gid_work, work);
        struct mlx4_cmd_mailbox *mailbox;
        union ib_gid *gids;
        int err;
        struct mlx4_dev *dev = gw->dev->dev;

        if (!gw->dev->ib_active)
                return;

        mailbox = mlx4_alloc_cmd_mailbox(dev);
        if (IS_ERR(mailbox)) {
                pr_warn("reset gid table failed\n");
                goto free;
        }

        gids = mailbox->buf;
        memcpy(gids, gw->gids, sizeof(gw->gids));

        if (mlx4_ib_port_link_layer(&gw->dev->ib_dev, gw->port) ==
                                    IB_LINK_LAYER_ETHERNET) {
                err = mlx4_cmd(dev, mailbox->dma,
                               MLX4_SET_PORT_GID_TABLE << 8 | gw->port,
                               MLX4_SET_PORT_ETH_OPCODE, MLX4_CMD_SET_PORT,
                               MLX4_CMD_TIME_CLASS_B,
                               MLX4_CMD_WRAPPED);
                if (err)
                        pr_warn("set port %d command failed\n", gw->port);
        }

        mlx4_free_cmd_mailbox(dev, mailbox);
free:
        kfree(gw);
}

static int update_gid_table(struct mlx4_ib_dev *dev, int port,
                            union ib_gid *gid, int clear,
                            int default_gid)
{
        struct update_gid_work *work;
        int i;
        int need_update = 0;
        int free = -1;
        int found = -1;
        int max_gids;

        if (default_gid) {
                free = 0;
        } else {
                max_gids = dev->dev->caps.gid_table_len[port];
                for (i = 1; i < max_gids; ++i) {
                        if (!memcmp(&dev->iboe.gid_table[port - 1][i], gid,
                                    sizeof(*gid)))
                                found = i;

                        if (clear) {
                                if (found >= 0) {
                                        need_update = 1;
                                        dev->iboe.gid_table[port - 1][found] =
                                                zgid;
                                        break;
                                }
                        } else {
                                if (found >= 0)
                                        break;

                                if (free < 0 &&
                                    !memcmp(&dev->iboe.gid_table[port - 1][i],
                                            &zgid, sizeof(*gid)))
                                        free = i;
                        }
                }
        }

        if (found == -1 && !clear && free >= 0) {
                dev->iboe.gid_table[port - 1][free] = *gid;
                need_update = 1;
        }

        if (!need_update)
                return 0;

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

        memcpy(work->gids, dev->iboe.gid_table[port - 1], sizeof(work->gids));
        INIT_WORK(&work->work, update_gids_task);
        work->port = port;
        work->dev = dev;
        queue_work(wq, &work->work);

        return 0;
}

static void mlx4_make_default_gid(struct  net_device *dev, union ib_gid *gid)
{
        gid->global.subnet_prefix = cpu_to_be64(0xfe80000000000000LL);
        mlx4_addrconf_ifid_eui48(&gid->raw[8], 0xffff, dev);
}


static int reset_gid_table(struct mlx4_ib_dev *dev, u8 port)
{
        struct update_gid_work *work;

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

        memset(dev->iboe.gid_table[port - 1], 0, sizeof(work->gids));
        memset(work->gids, 0, sizeof(work->gids));
        INIT_WORK(&work->work, reset_gids_task);
        work->dev = dev;
        work->port = port;
        queue_work(wq, &work->work);
        return 0;
}

static int mlx4_ib_addr_event(int event, struct net_device *event_netdev,
                              struct mlx4_ib_dev *ibdev, union ib_gid *gid)
{
        struct mlx4_ib_iboe *iboe;
        int port = 0;
        struct net_device *real_dev = rdma_vlan_dev_real_dev(event_netdev) ?
                                rdma_vlan_dev_real_dev(event_netdev) :
                                event_netdev;
        union ib_gid default_gid;

        mlx4_make_default_gid(real_dev, &default_gid);

        if (!memcmp(gid, &default_gid, sizeof(*gid)))
                return 0;

        if (event != NETDEV_DOWN && event != NETDEV_UP)
                return 0;

        if ((real_dev != event_netdev) &&
            (event == NETDEV_DOWN) &&
            rdma_link_local_addr((struct in6_addr *)gid))
                return 0;

        iboe = &ibdev->iboe;
        spin_lock_bh(&iboe->lock);

        for (port = 1; port <= ibdev->dev->caps.num_ports; ++port)
                if ((netif_is_bond_master(real_dev) &&
                     (real_dev == iboe->masters[port - 1])) ||
                     (!netif_is_bond_master(real_dev) &&
                     (real_dev == iboe->netdevs[port - 1])))
                        update_gid_table(ibdev, port, gid,
                                         event == NETDEV_DOWN, 0);

        spin_unlock_bh(&iboe->lock);
        return 0;

}

static u8 mlx4_ib_get_dev_port(struct net_device *dev,
                               struct mlx4_ib_dev *ibdev)
{
        u8 port = 0;
        struct mlx4_ib_iboe *iboe;
        struct net_device *real_dev = rdma_vlan_dev_real_dev(dev) ?
                                rdma_vlan_dev_real_dev(dev) : dev;

        iboe = &ibdev->iboe;

        for (port = 1; port <= ibdev->dev->caps.num_ports; ++port)
                if ((netif_is_bond_master(real_dev) &&
                     (real_dev == iboe->masters[port - 1])) ||
                     (!netif_is_bond_master(real_dev) &&
                     (real_dev == iboe->netdevs[port - 1])))
                        break;

        if ((port == 0) || (port > ibdev->dev->caps.num_ports))
                return 0;
        else
                return port;
}

static int mlx4_ib_inet_event(struct notifier_block *this, unsigned long event,
                                void *ptr)
{
        struct mlx4_ib_dev *ibdev;
        struct in_ifaddr *ifa = ptr;
        union ib_gid gid;
        struct net_device *event_netdev = ifa->ifa_dev->dev;

        ipv6_addr_set_v4mapped(ifa->ifa_address, (struct in6_addr *)&gid);

        ibdev = container_of(this, struct mlx4_ib_dev, iboe.nb_inet);

        mlx4_ib_addr_event(event, event_netdev, ibdev, &gid);
        return NOTIFY_DONE;
}

#if IS_ENABLED(CONFIG_IPV6)
static int mlx4_ib_inet6_event(struct notifier_block *this, unsigned long event,
                                void *ptr)
{
        struct mlx4_ib_dev *ibdev;
        struct inet6_ifaddr *ifa = ptr;
        union  ib_gid *gid = (union ib_gid *)&ifa->addr;
        struct net_device *event_netdev = ifa->idev->dev;

        ibdev = container_of(this, struct mlx4_ib_dev, iboe.nb_inet6);

        mlx4_ib_addr_event(event, event_netdev, ibdev, gid);
        return NOTIFY_DONE;
}
#endif

#define MLX4_IB_INVALID_MAC     ((u64)-1)
static void mlx4_ib_update_qps(struct mlx4_ib_dev *ibdev,
                               struct net_device *dev,
                               int port)
{
        u64 new_smac = 0;
        u64 release_mac = MLX4_IB_INVALID_MAC;
        struct mlx4_ib_qp *qp;

        read_lock(&dev_base_lock);
        new_smac = mlx4_mac_to_u64(dev->dev_addr);
        read_unlock(&dev_base_lock);

        atomic64_set(&ibdev->iboe.mac[port - 1], new_smac);

        /* no need for update QP1 and mac registration in non-SRIOV */
        if (!mlx4_is_mfunc(ibdev->dev))
                return;

        mutex_lock(&ibdev->qp1_proxy_lock[port - 1]);
        qp = ibdev->qp1_proxy[port - 1];
        if (qp) {
                int new_smac_index;
                u64 old_smac;
                struct mlx4_update_qp_params update_params;

                mutex_lock(&qp->mutex);
                old_smac = qp->pri.smac;
                if (new_smac == old_smac)
                        goto unlock;

                new_smac_index = mlx4_register_mac(ibdev->dev, port, new_smac);

                if (new_smac_index < 0)
                        goto unlock;

                update_params.smac_index = new_smac_index;
                if (mlx4_update_qp(ibdev->dev, qp->mqp.qpn, MLX4_UPDATE_QP_SMAC,
                                   &update_params)) {
                        release_mac = new_smac;
                        goto unlock;
                }
                /* if old port was zero, no mac was yet registered for this QP */
                if (qp->pri.smac_port)
                        release_mac = old_smac;
                qp->pri.smac = new_smac;
                qp->pri.smac_port = port;
                qp->pri.smac_index = new_smac_index;
        }

unlock:
        if (release_mac != MLX4_IB_INVALID_MAC)
                mlx4_unregister_mac(ibdev->dev, port, release_mac);
        if (qp)
                mutex_unlock(&qp->mutex);
        mutex_unlock(&ibdev->qp1_proxy_lock[port - 1]);
}

static void mlx4_ib_get_dev_addr(struct net_device *dev,
                                 struct mlx4_ib_dev *ibdev, u8 port)
{
        struct in_device *in_dev;
#if IS_ENABLED(CONFIG_IPV6)
        struct inet6_dev *in6_dev;
        union ib_gid  *pgid;
        struct inet6_ifaddr *ifp;
        union ib_gid default_gid;
#endif
        union ib_gid gid;


        if ((port == 0) || (port > ibdev->dev->caps.num_ports))
                return;

        /* IPv4 gids */
        in_dev = in_dev_get(dev);
        if (in_dev) {
                for_ifa(in_dev) {
                        /*ifa->ifa_address;*/
                        ipv6_addr_set_v4mapped(ifa->ifa_address,
                                               (struct in6_addr *)&gid);
                        update_gid_table(ibdev, port, &gid, 0, 0);
                }
                endfor_ifa(in_dev);
                in_dev_put(in_dev);
        }
#if IS_ENABLED(CONFIG_IPV6)
        mlx4_make_default_gid(dev, &default_gid);
        /* IPv6 gids */
        in6_dev = in6_dev_get(dev);
        if (in6_dev) {
                read_lock_bh(&in6_dev->lock);
                list_for_each_entry(ifp, &in6_dev->addr_list, if_list) {
                        pgid = (union ib_gid *)&ifp->addr;
                        if (!memcmp(pgid, &default_gid, sizeof(*pgid)))
                                continue;
                        update_gid_table(ibdev, port, pgid, 0, 0);
                }
                read_unlock_bh(&in6_dev->lock);
                in6_dev_put(in6_dev);
        }
#endif
}

static void mlx4_ib_set_default_gid(struct mlx4_ib_dev *ibdev,
                                 struct  net_device *dev, u8 port)
{
        union ib_gid gid;
        mlx4_make_default_gid(dev, &gid);
        update_gid_table(ibdev, port, &gid, 0, 1);
}

static int mlx4_ib_init_gid_table(struct mlx4_ib_dev *ibdev)
{
        struct  net_device *dev;
        struct mlx4_ib_iboe *iboe = &ibdev->iboe;
        int i;
        int err = 0;

        for (i = 1; i <= ibdev->num_ports; ++i) {
                if (rdma_port_get_link_layer(&ibdev->ib_dev, i) ==
                    IB_LINK_LAYER_ETHERNET) {
                        err = reset_gid_table(ibdev, i);
                        if (err)
                                goto out;
                }
        }

        read_lock(&dev_base_lock);
        spin_lock_bh(&iboe->lock);

        for_each_netdev(&init_net, dev) {
                u8 port = mlx4_ib_get_dev_port(dev, ibdev);
                /* port will be non-zero only for ETH ports */
                if (port) {
                        mlx4_ib_set_default_gid(ibdev, dev, port);
                        mlx4_ib_get_dev_addr(dev, ibdev, port);
                }
        }

        spin_unlock_bh(&iboe->lock);
        read_unlock(&dev_base_lock);
out:
        return err;
}

static void mlx4_ib_scan_netdevs(struct mlx4_ib_dev *ibdev,
                                 struct net_device *dev,
                                 unsigned long event)

{
        struct mlx4_ib_iboe *iboe;
        int update_qps_port = -1;
        int port;

        iboe = &ibdev->iboe;

        spin_lock_bh(&iboe->lock);
        mlx4_foreach_ib_transport_port(port, ibdev->dev) {
                enum ib_port_state      port_state = IB_PORT_NOP;
                struct net_device *old_master = iboe->masters[port - 1];
                struct net_device *curr_netdev;
                struct net_device *curr_master;

                iboe->netdevs[port - 1] =
                        mlx4_get_protocol_dev(ibdev->dev, MLX4_PROT_ETH, port);
                if (iboe->netdevs[port - 1])
                        mlx4_ib_set_default_gid(ibdev,
                                                iboe->netdevs[port - 1], port);
                curr_netdev = iboe->netdevs[port - 1];

                if (iboe->netdevs[port - 1] &&
                    netif_is_bond_slave(iboe->netdevs[port - 1])) {
                        iboe->masters[port - 1] = netdev_master_upper_dev_get(
                                iboe->netdevs[port - 1]);
                } else {
                        iboe->masters[port - 1] = NULL;
                }
                curr_master = iboe->masters[port - 1];

                if (dev == iboe->netdevs[port - 1] &&
                    (event == NETDEV_CHANGEADDR || event == NETDEV_REGISTER ||
                     event == NETDEV_UP || event == NETDEV_CHANGE))
                        update_qps_port = port;

                if (curr_netdev) {
                        port_state = (netif_running(curr_netdev) && netif_carrier_ok(curr_netdev)) ?
                                                IB_PORT_ACTIVE : IB_PORT_DOWN;
                        mlx4_ib_set_default_gid(ibdev, curr_netdev, port);
                        if (curr_master) {
                                /* if using bonding/team and a slave port is down, we
                                 * don't want the bond IP based gids in the table since
                                 * flows that select port by gid may get the down port.
                                */
                                if (port_state == IB_PORT_DOWN &&
                                    !mlx4_is_bonded(ibdev->dev)) {
                                        reset_gid_table(ibdev, port);
                                        mlx4_ib_set_default_gid(ibdev,
                                                                curr_netdev,
                                                                port);
                                } else {
                                        /* gids from the upper dev (bond/team)
                                         * should appear in port's gid table
                                        */
                                        mlx4_ib_get_dev_addr(curr_master,
                                                             ibdev, port);
                                }
                        }
                        /* if bonding is used it is possible that we add it to
                         * masters only after IP address is assigned to the
                         * net bonding interface.
                        */
                        if (curr_master && (old_master != curr_master)) {
                                reset_gid_table(ibdev, port);
                                mlx4_ib_set_default_gid(ibdev,
                                                        curr_netdev, port);
                                mlx4_ib_get_dev_addr(curr_master, ibdev, port);
                        }

                        if (!curr_master && (old_master != curr_master)) {
                                reset_gid_table(ibdev, port);
                                mlx4_ib_set_default_gid(ibdev,
                                                        curr_netdev, port);
                                mlx4_ib_get_dev_addr(curr_netdev, ibdev, port);
                        }
                } else {
                        reset_gid_table(ibdev, port);
                }
        }

        spin_unlock_bh(&iboe->lock);

        if (update_qps_port > 0)
                mlx4_ib_update_qps(ibdev, dev, update_qps_port);
}

static int mlx4_ib_netdev_event(struct notifier_block *this,
                                unsigned long event, void *ptr)
{
        struct net_device *dev = netdev_notifier_info_to_dev(ptr);
        struct mlx4_ib_dev *ibdev;

        if (!net_eq(dev_net(dev), &init_net))

                return NOTIFY_DONE;

        ibdev = container_of(this, struct mlx4_ib_dev, iboe.nb);
        mlx4_ib_scan_netdevs(ibdev, dev, event);

        return NOTIFY_DONE;
}

static void init_pkeys(struct mlx4_ib_dev *ibdev)
{
        int port;
        int slave;
        int i;

        if (mlx4_is_master(ibdev->dev)) {
                for (slave = 0; slave <= ibdev->dev->persist->num_vfs;
                     ++slave) {
                        for (port = 1; port <= ibdev->dev->caps.num_ports; ++port) {
                                for (i = 0;
                                     i < ibdev->dev->phys_caps.pkey_phys_table_len[port];
                                     ++i) {
                                        ibdev->pkeys.virt2phys_pkey[slave][port - 1][i] =
                                        /* master has the identity virt2phys pkey mapping */
                                                (slave == mlx4_master_func_num(ibdev->dev) || !i) ? i :
                                                        ibdev->dev->phys_caps.pkey_phys_table_len[port] - 1;
                                        mlx4_sync_pkey_table(ibdev->dev, slave, port, i,
                                                             ibdev->pkeys.virt2phys_pkey[slave][port - 1][i]);
                                }
                        }
                }
                /* initialize pkey cache */
                for (port = 1; port <= ibdev->dev->caps.num_ports; ++port) {
                        for (i = 0;
                             i < ibdev->dev->phys_caps.pkey_phys_table_len[port];
                             ++i)
                                ibdev->pkeys.phys_pkey_cache[port-1][i] =
                                        (i) ? 0 : 0xFFFF;
                }
        }
}

static void mlx4_ib_alloc_eqs(struct mlx4_dev *dev, struct mlx4_ib_dev *ibdev)
{
        char name[80];
        int eq_per_port = 0;
        int added_eqs = 0;
        int total_eqs = 0;
        int i, j, eq;

        /* Legacy mode or comp_pool is not large enough */
        if (dev->caps.comp_pool == 0 ||
            dev->caps.num_ports > dev->caps.comp_pool)
                return;

        eq_per_port = dev->caps.comp_pool / dev->caps.num_ports;

        /* Init eq table */
        added_eqs = 0;
        mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_IB)
                added_eqs += eq_per_port;

        total_eqs = dev->caps.num_comp_vectors + added_eqs;

        ibdev->eq_table = kzalloc(total_eqs * sizeof(int), GFP_KERNEL);
        if (!ibdev->eq_table)
                return;

        ibdev->eq_added = added_eqs;

        eq = 0;
        mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_IB) {
                for (j = 0; j < eq_per_port; j++) {
                        snprintf(name, sizeof(name), "mlx4-ib-%d-%d@%s",
                                 i, j, dev->persist->pdev->bus->name);
                        /* Set IRQ for specific name (per ring) */
                        if (mlx4_assign_eq(dev, name, NULL,
                                           &ibdev->eq_table[eq])) {
                                /* Use legacy (same as mlx4_en driver) */
                                pr_warn("Can't allocate EQ %d; reverting to legacy\n", eq);
                                ibdev->eq_table[eq] =
                                        (eq % dev->caps.num_comp_vectors);
                        }
                        eq++;
                }
        }

        /* Fill the reset of the vector with legacy EQ */
        for (i = 0, eq = added_eqs; i < dev->caps.num_comp_vectors; i++)
                ibdev->eq_table[eq++] = i;

        /* Advertise the new number of EQs to clients */
        ibdev->ib_dev.num_comp_vectors = total_eqs;
}

static void mlx4_ib_free_eqs(struct mlx4_dev *dev, struct mlx4_ib_dev *ibdev)
{
        int i;

        /* no additional eqs were added */
        if (!ibdev->eq_table)
                return;

        /* Reset the advertised EQ number */
        ibdev->ib_dev.num_comp_vectors = dev->caps.num_comp_vectors;

        /* Free only the added eqs */
        for (i = 0; i < ibdev->eq_added; i++) {
                /* Don't free legacy eqs if used */
                if (ibdev->eq_table[i] <= dev->caps.num_comp_vectors)
                        continue;
                mlx4_release_eq(dev, ibdev->eq_table[i]);
        }

        kfree(ibdev->eq_table);
}

static void *mlx4_ib_add(struct mlx4_dev *dev)
{
        struct mlx4_ib_dev *ibdev;
        int num_ports = 0;
        int i, j;
        int err;
        struct mlx4_ib_iboe *iboe;
        int ib_num_ports = 0;
        int num_req_counters;

        pr_info_once("%s", mlx4_ib_version);

        num_ports = 0;
        mlx4_foreach_ib_transport_port(i, dev)
                num_ports++;

        /* No point in registering a device with no ports... */
        if (num_ports == 0)
                return NULL;

        ibdev = (struct mlx4_ib_dev *) ib_alloc_device(sizeof *ibdev);
        if (!ibdev) {
                dev_err(&dev->persist->pdev->dev,
                        "Device struct alloc failed\n");
                return NULL;
        }

        iboe = &ibdev->iboe;

        if (mlx4_pd_alloc(dev, &ibdev->priv_pdn))
                goto err_dealloc;

        if (mlx4_uar_alloc(dev, &ibdev->priv_uar))
                goto err_pd;

        ibdev->uar_map = ioremap((phys_addr_t) ibdev->priv_uar.pfn << PAGE_SHIFT,
                                 PAGE_SIZE);
        if (!ibdev->uar_map)
                goto err_uar;
        MLX4_INIT_DOORBELL_LOCK(&ibdev->uar_lock);

        ibdev->dev = dev;
        ibdev->bond_next_port   = 0;

        strlcpy(ibdev->ib_dev.name, "mlx4_%d", IB_DEVICE_NAME_MAX);
        ibdev->ib_dev.owner             = THIS_MODULE;
        ibdev->ib_dev.node_type         = RDMA_NODE_IB_CA;
        ibdev->ib_dev.local_dma_lkey    = dev->caps.reserved_lkey;
        ibdev->num_ports                = num_ports;
        ibdev->ib_dev.phys_port_cnt     = mlx4_is_bonded(dev) ?
                                                1 : ibdev->num_ports;
        ibdev->ib_dev.num_comp_vectors  = dev->caps.num_comp_vectors;
        ibdev->ib_dev.dma_device        = &dev->persist->pdev->dev;

        if (dev->caps.userspace_caps)
                ibdev->ib_dev.uverbs_abi_ver = MLX4_IB_UVERBS_ABI_VERSION;
        else
                ibdev->ib_dev.uverbs_abi_ver = MLX4_IB_UVERBS_NO_DEV_CAPS_ABI_VERSION;

        ibdev->ib_dev.uverbs_cmd_mask   =
                (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
                (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
                (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
                (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
                (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
                (1ull << IB_USER_VERBS_CMD_REG_MR)              |
                (1ull << IB_USER_VERBS_CMD_REREG_MR)            |
                (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
                (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
                (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
                (1ull << IB_USER_VERBS_CMD_RESIZE_CQ)           |
                (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
                (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
                (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
                (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
                (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
                (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST)        |
                (1ull << IB_USER_VERBS_CMD_DETACH_MCAST)        |
                (1ull << IB_USER_VERBS_CMD_CREATE_SRQ)          |
                (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ)          |
                (1ull << IB_USER_VERBS_CMD_QUERY_SRQ)           |
                (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ)         |
                (1ull << IB_USER_VERBS_CMD_CREATE_XSRQ)         |
                (1ull << IB_USER_VERBS_CMD_OPEN_QP);

        ibdev->ib_dev.query_device      = mlx4_ib_query_device;
        ibdev->ib_dev.query_port        = mlx4_ib_query_port;
        ibdev->ib_dev.get_link_layer    = mlx4_ib_port_link_layer;
        ibdev->ib_dev.query_gid         = mlx4_ib_query_gid;
        ibdev->ib_dev.query_pkey        = mlx4_ib_query_pkey;
        ibdev->ib_dev.modify_device     = mlx4_ib_modify_device;
        ibdev->ib_dev.modify_port       = mlx4_ib_modify_port;
        ibdev->ib_dev.alloc_ucontext    = mlx4_ib_alloc_ucontext;
        ibdev->ib_dev.dealloc_ucontext  = mlx4_ib_dealloc_ucontext;
        ibdev->ib_dev.mmap              = mlx4_ib_mmap;
        ibdev->ib_dev.alloc_pd          = mlx4_ib_alloc_pd;
        ibdev->ib_dev.dealloc_pd        = mlx4_ib_dealloc_pd;
        ibdev->ib_dev.create_ah         = mlx4_ib_create_ah;
        ibdev->ib_dev.query_ah          = mlx4_ib_query_ah;
        ibdev->ib_dev.destroy_ah        = mlx4_ib_destroy_ah;
        ibdev->ib_dev.create_srq        = mlx4_ib_create_srq;
        ibdev->ib_dev.modify_srq        = mlx4_ib_modify_srq;
        ibdev->ib_dev.query_srq         = mlx4_ib_query_srq;
        ibdev->ib_dev.destroy_srq       = mlx4_ib_destroy_srq;
        ibdev->ib_dev.post_srq_recv     = mlx4_ib_post_srq_recv;
        ibdev->ib_dev.create_qp         = mlx4_ib_create_qp;
        ibdev->ib_dev.modify_qp         = mlx4_ib_modify_qp;
        ibdev->ib_dev.query_qp          = mlx4_ib_query_qp;
        ibdev->ib_dev.destroy_qp        = mlx4_ib_destroy_qp;
        ibdev->ib_dev.post_send         = mlx4_ib_post_send;
        ibdev->ib_dev.post_recv         = mlx4_ib_post_recv;
        ibdev->ib_dev.create_cq         = mlx4_ib_create_cq;
        ibdev->ib_dev.modify_cq         = mlx4_ib_modify_cq;
        ibdev->ib_dev.resize_cq         = mlx4_ib_resize_cq;
        ibdev->ib_dev.destroy_cq        = mlx4_ib_destroy_cq;
        ibdev->ib_dev.poll_cq           = mlx4_ib_poll_cq;
        ibdev->ib_dev.req_notify_cq     = mlx4_ib_arm_cq;
        ibdev->ib_dev.get_dma_mr        = mlx4_ib_get_dma_mr;
        ibdev->ib_dev.reg_user_mr       = mlx4_ib_reg_user_mr;
        ibdev->ib_dev.rereg_user_mr     = mlx4_ib_rereg_user_mr;
        ibdev->ib_dev.dereg_mr          = mlx4_ib_dereg_mr;
        ibdev->ib_dev.alloc_fast_reg_mr = mlx4_ib_alloc_fast_reg_mr;
        ibdev->ib_dev.alloc_fast_reg_page_list = mlx4_ib_alloc_fast_reg_page_list;
        ibdev->ib_dev.free_fast_reg_page_list  = mlx4_ib_free_fast_reg_page_list;
        ibdev->ib_dev.attach_mcast      = mlx4_ib_mcg_attach;
        ibdev->ib_dev.detach_mcast      = mlx4_ib_mcg_detach;
        ibdev->ib_dev.process_mad       = mlx4_ib_process_mad;

        if (!mlx4_is_slave(ibdev->dev)) {
                ibdev->ib_dev.alloc_fmr         = mlx4_ib_fmr_alloc;
                ibdev->ib_dev.map_phys_fmr      = mlx4_ib_map_phys_fmr;
                ibdev->ib_dev.unmap_fmr         = mlx4_ib_unmap_fmr;
                ibdev->ib_dev.dealloc_fmr       = mlx4_ib_fmr_dealloc;
        }

        if (dev->caps.flags & MLX4_DEV_CAP_FLAG_MEM_WINDOW ||
            dev->caps.bmme_flags & MLX4_BMME_FLAG_TYPE_2_WIN) {
                ibdev->ib_dev.alloc_mw = mlx4_ib_alloc_mw;
                ibdev->ib_dev.bind_mw = mlx4_ib_bind_mw;
                ibdev->ib_dev.dealloc_mw = mlx4_ib_dealloc_mw;

                ibdev->ib_dev.uverbs_cmd_mask |=
                        (1ull << IB_USER_VERBS_CMD_ALLOC_MW) |
                        (1ull << IB_USER_VERBS_CMD_DEALLOC_MW);
        }

        if (dev->caps.flags & MLX4_DEV_CAP_FLAG_XRC) {
                ibdev->ib_dev.alloc_xrcd = mlx4_ib_alloc_xrcd;
                ibdev->ib_dev.dealloc_xrcd = mlx4_ib_dealloc_xrcd;
                ibdev->ib_dev.uverbs_cmd_mask |=
                        (1ull << IB_USER_VERBS_CMD_OPEN_XRCD) |
                        (1ull << IB_USER_VERBS_CMD_CLOSE_XRCD);
        }

        if (check_flow_steering_support(dev)) {
                ibdev->steering_support = MLX4_STEERING_MODE_DEVICE_MANAGED;
                ibdev->ib_dev.create_flow       = mlx4_ib_create_flow;
                ibdev->ib_dev.destroy_flow      = mlx4_ib_destroy_flow;

                ibdev->ib_dev.uverbs_ex_cmd_mask        |=
                        (1ull << IB_USER_VERBS_EX_CMD_CREATE_FLOW) |
                        (1ull << IB_USER_VERBS_EX_CMD_DESTROY_FLOW);
        }

        mlx4_ib_alloc_eqs(dev, ibdev);

        spin_lock_init(&iboe->lock);

        if (init_node_data(ibdev))
                goto err_map;

        num_req_counters = mlx4_is_bonded(dev) ? 1 : ibdev->num_ports;
        for (i = 0; i < num_req_counters; ++i) {
                mutex_init(&ibdev->qp1_proxy_lock[i]);
                if (mlx4_ib_port_link_layer(&ibdev->ib_dev, i + 1) ==
                                                IB_LINK_LAYER_ETHERNET) {
                        err = mlx4_counter_alloc(ibdev->dev, &ibdev->counters[i]);
                        if (err)
                                ibdev->counters[i] = -1;
                } else {
                        ibdev->counters[i] = -1;
                }
        }
        if (mlx4_is_bonded(dev))
                for (i = 1; i < ibdev->num_ports ; ++i)
                        ibdev->counters[i] = ibdev->counters[0];


        mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_IB)
                ib_num_ports++;

        spin_lock_init(&ibdev->sm_lock);
        mutex_init(&ibdev->cap_mask_mutex);
        INIT_LIST_HEAD(&ibdev->qp_list);
        spin_lock_init(&ibdev->reset_flow_resource_lock);

        if (ibdev->steering_support == MLX4_STEERING_MODE_DEVICE_MANAGED &&
            ib_num_ports) {
                ibdev->steer_qpn_count = MLX4_IB_UC_MAX_NUM_QPS;
                err = mlx4_qp_reserve_range(dev, ibdev->steer_qpn_count,
                                            MLX4_IB_UC_STEER_QPN_ALIGN,
                                            &ibdev->steer_qpn_base, 0);
                if (err)
                        goto err_counter;

                ibdev->ib_uc_qpns_bitmap =
                        kmalloc(BITS_TO_LONGS(ibdev->steer_qpn_count) *
                                sizeof(long),
                                GFP_KERNEL);
                if (!ibdev->ib_uc_qpns_bitmap) {
                        dev_err(&dev->persist->pdev->dev,
                                "bit map alloc failed\n");
                        goto err_steer_qp_release;
                }

                bitmap_zero(ibdev->ib_uc_qpns_bitmap, ibdev->steer_qpn_count);

                err = mlx4_FLOW_STEERING_IB_UC_QP_RANGE(
                                dev, ibdev->steer_qpn_base,
                                ibdev->steer_qpn_base +
                                ibdev->steer_qpn_count - 1);
                if (err)
                        goto err_steer_free_bitmap;
        }

        for (j = 1; j <= ibdev->dev->caps.num_ports; j++)
                atomic64_set(&iboe->mac[j - 1], ibdev->dev->caps.def_mac[j]);

        if (ib_register_device(&ibdev->ib_dev, NULL))
                goto err_steer_free_bitmap;

        if (mlx4_ib_mad_init(ibdev))
                goto err_reg;

        if (mlx4_ib_init_sriov(ibdev))
                goto err_mad;

        if (dev->caps.flags & MLX4_DEV_CAP_FLAG_IBOE) {
                if (!iboe->nb.notifier_call) {
                        iboe->nb.notifier_call = mlx4_ib_netdev_event;
                        err = register_netdevice_notifier(&iboe->nb);
                        if (err) {
                                iboe->nb.notifier_call = NULL;
                                goto err_notif;
                        }
                }
                if (!iboe->nb_inet.notifier_call) {
                        iboe->nb_inet.notifier_call = mlx4_ib_inet_event;
                        err = register_inetaddr_notifier(&iboe->nb_inet);
                        if (err) {
                                iboe->nb_inet.notifier_call = NULL;
                                goto err_notif;
                        }
                }
#if IS_ENABLED(CONFIG_IPV6)
                if (!iboe->nb_inet6.notifier_call) {
                        iboe->nb_inet6.notifier_call = mlx4_ib_inet6_event;
                        err = register_inet6addr_notifier(&iboe->nb_inet6);
                        if (err) {
                                iboe->nb_inet6.notifier_call = NULL;
                                goto err_notif;
                        }
                }
#endif
                if (mlx4_ib_init_gid_table(ibdev))
                        goto err_notif;
        }

        for (j = 0; j < ARRAY_SIZE(mlx4_class_attributes); ++j) {
                if (device_create_file(&ibdev->ib_dev.dev,
                                       mlx4_class_attributes[j]))
                        goto err_notif;
        }

        ibdev->ib_active = true;

        if (mlx4_is_mfunc(ibdev->dev))
                init_pkeys(ibdev);

        /* create paravirt contexts for any VFs which are active */
        if (mlx4_is_master(ibdev->dev)) {
                for (j = 0; j < MLX4_MFUNC_MAX; j++) {
                        if (j == mlx4_master_func_num(ibdev->dev))
                                continue;
                        if (mlx4_is_slave_active(ibdev->dev, j))
                                do_slave_init(ibdev, j, 1);
                }
        }
        return ibdev;

err_notif:
        if (ibdev->iboe.nb.notifier_call) {
                if (unregister_netdevice_notifier(&ibdev->iboe.nb))
                        pr_warn("failure unregistering notifier\n");
                ibdev->iboe.nb.notifier_call = NULL;
        }
        if (ibdev->iboe.nb_inet.notifier_call) {
                if (unregister_inetaddr_notifier(&ibdev->iboe.nb_inet))
                        pr_warn("failure unregistering notifier\n");
                ibdev->iboe.nb_inet.notifier_call = NULL;
        }
#if IS_ENABLED(CONFIG_IPV6)
        if (ibdev->iboe.nb_inet6.notifier_call) {
                if (unregister_inet6addr_notifier(&ibdev->iboe.nb_inet6))
                        pr_warn("failure unregistering notifier\n");
                ibdev->iboe.nb_inet6.notifier_call = NULL;
        }
#endif
        flush_workqueue(wq);

        mlx4_ib_close_sriov(ibdev);

err_mad:
        mlx4_ib_mad_cleanup(ibdev);

err_reg:
        ib_unregister_device(&ibdev->ib_dev);

err_steer_free_bitmap:
        kfree(ibdev->ib_uc_qpns_bitmap);

err_steer_qp_release:
        if (ibdev->steering_support == MLX4_STEERING_MODE_DEVICE_MANAGED)
                mlx4_qp_release_range(dev, ibdev->steer_qpn_base,
                                      ibdev->steer_qpn_count);
err_counter:
        for (; i; --i)
                if (ibdev->counters[i - 1] != -1)
                        mlx4_counter_free(ibdev->dev, ibdev->counters[i - 1]);

err_map:
        iounmap(ibdev->uar_map);

err_uar:
        mlx4_uar_free(dev, &ibdev->priv_uar);

err_pd:
        mlx4_pd_free(dev, ibdev->priv_pdn);

err_dealloc:
        ib_dealloc_device(&ibdev->ib_dev);

        return NULL;
}

int mlx4_ib_steer_qp_alloc(struct mlx4_ib_dev *dev, int count, int *qpn)
{
        int offset;

        WARN_ON(!dev->ib_uc_qpns_bitmap);

        offset = bitmap_find_free_region(dev->ib_uc_qpns_bitmap,
                                         dev->steer_qpn_count,
                                         get_count_order(count));
        if (offset < 0)
                return offset;

        *qpn = dev->steer_qpn_base + offset;
        return 0;
}

void mlx4_ib_steer_qp_free(struct mlx4_ib_dev *dev, u32 qpn, int count)
{
        if (!qpn ||
            dev->steering_support != MLX4_STEERING_MODE_DEVICE_MANAGED)
                return;

        BUG_ON(qpn < dev->steer_qpn_base);

        bitmap_release_region(dev->ib_uc_qpns_bitmap,
                              qpn - dev->steer_qpn_base,
                              get_count_order(count));
}

int mlx4_ib_steer_qp_reg(struct mlx4_ib_dev *mdev, struct mlx4_ib_qp *mqp,
                         int is_attach)
{
        int err;
        size_t flow_size;
        struct ib_flow_attr *flow = NULL;
        struct ib_flow_spec_ib *ib_spec;

        if (is_attach) {
                flow_size = sizeof(struct ib_flow_attr) +
                            sizeof(struct ib_flow_spec_ib);
                flow = kzalloc(flow_size, GFP_KERNEL);
                if (!flow)
                        return -ENOMEM;
                flow->port = mqp->port;
                flow->num_of_specs = 1;
                flow->size = flow_size;
                ib_spec = (struct ib_flow_spec_ib *)(flow + 1);
                ib_spec->type = IB_FLOW_SPEC_IB;
                ib_spec->size = sizeof(struct ib_flow_spec_ib);
                /* Add an empty rule for IB L2 */
                memset(&ib_spec->mask, 0, sizeof(ib_spec->mask));

                err = __mlx4_ib_create_flow(&mqp->ibqp, flow,
                                            IB_FLOW_DOMAIN_NIC,
                                            MLX4_FS_REGULAR,
                                            &mqp->reg_id);
        } else {
                err = __mlx4_ib_destroy_flow(mdev->dev, mqp->reg_id);
        }
        kfree(flow);
        return err;
}

static void mlx4_ib_remove(struct mlx4_dev *dev, void *ibdev_ptr)
{
        struct mlx4_ib_dev *ibdev = ibdev_ptr;
        int p;

        ibdev->ib_active = false;
        flush_workqueue(wq);

        mlx4_ib_close_sriov(ibdev);
        mlx4_ib_mad_cleanup(ibdev);
        ib_unregister_device(&ibdev->ib_dev);
        if (ibdev->iboe.nb.notifier_call) {
                if (unregister_netdevice_notifier(&ibdev->iboe.nb))
                        pr_warn("failure unregistering notifier\n");
                ibdev->iboe.nb.notifier_call = NULL;
        }

        if (ibdev->steering_support == MLX4_STEERING_MODE_DEVICE_MANAGED) {
                mlx4_qp_release_range(dev, ibdev->steer_qpn_base,
                                      ibdev->steer_qpn_count);
                kfree(ibdev->ib_uc_qpns_bitmap);
        }

        if (ibdev->iboe.nb_inet.notifier_call) {
                if (unregister_inetaddr_notifier(&ibdev->iboe.nb_inet))
                        pr_warn("failure unregistering notifier\n");
                ibdev->iboe.nb_inet.notifier_call = NULL;
        }
#if IS_ENABLED(CONFIG_IPV6)
        if (ibdev->iboe.nb_inet6.notifier_call) {
                if (unregister_inet6addr_notifier(&ibdev->iboe.nb_inet6))
                        pr_warn("failure unregistering notifier\n");
                ibdev->iboe.nb_inet6.notifier_call = NULL;
        }
#endif

        iounmap(ibdev->uar_map);
        for (p = 0; p < ibdev->num_ports; ++p)
                if (ibdev->counters[p] != -1)
                        mlx4_counter_free(ibdev->dev, ibdev->counters[p]);
        mlx4_foreach_port(p, dev, MLX4_PORT_TYPE_IB)
                mlx4_CLOSE_PORT(dev, p);

        mlx4_ib_free_eqs(dev, ibdev);

        mlx4_uar_free(dev, &ibdev->priv_uar);
        mlx4_pd_free(dev, ibdev->priv_pdn);
        ib_dealloc_device(&ibdev->ib_dev);
}

static void do_slave_init(struct mlx4_ib_dev *ibdev, int slave, int do_init)
{
        struct mlx4_ib_demux_work **dm = NULL;
        struct mlx4_dev *dev = ibdev->dev;
        int i;
        unsigned long flags;
        struct mlx4_active_ports actv_ports;
        unsigned int ports;
        unsigned int first_port;

        if (!mlx4_is_master(dev))
                return;

        actv_ports = mlx4_get_active_ports(dev, slave);
        ports = bitmap_weight(actv_ports.ports, dev->caps.num_ports);
        first_port = find_first_bit(actv_ports.ports, dev->caps.num_ports);

        dm = kcalloc(ports, sizeof(*dm), GFP_ATOMIC);
        if (!dm) {
                pr_err("failed to allocate memory for tunneling qp update\n");
                goto out;
        }

        for (i = 0; i < ports; i++) {
                dm[i] = kmalloc(sizeof (struct mlx4_ib_demux_work), GFP_ATOMIC);
                if (!dm[i]) {
                        pr_err("failed to allocate memory for tunneling qp update work struct\n");
                        for (i = 0; i < dev->caps.num_ports; i++) {
                                if (dm[i])
                                        kfree(dm[i]);
                        }
                        goto out;
                }
        }
        /* initialize or tear down tunnel QPs for the slave */
        for (i = 0; i < ports; i++) {
                INIT_WORK(&dm[i]->work, mlx4_ib_tunnels_update_work);
                dm[i]->port = first_port + i + 1;
                dm[i]->slave = slave;
                dm[i]->do_init = do_init;
                dm[i]->dev = ibdev;
                spin_lock_irqsave(&ibdev->sriov.going_down_lock, flags);
                if (!ibdev->sriov.is_going_down)
                        queue_work(ibdev->sriov.demux[i].ud_wq, &dm[i]->work);
                spin_unlock_irqrestore(&ibdev->sriov.going_down_lock, flags);
        }
out:
        kfree(dm);
        return;
}

static void mlx4_ib_handle_catas_error(struct mlx4_ib_dev *ibdev)
{
        struct mlx4_ib_qp *mqp;
        unsigned long flags_qp;
        unsigned long flags_cq;
        struct mlx4_ib_cq *send_mcq, *recv_mcq;
        struct list_head    cq_notify_list;
        struct mlx4_cq *mcq;
        unsigned long flags;

        pr_warn("mlx4_ib_handle_catas_error was started\n");
        INIT_LIST_HEAD(&cq_notify_list);

        /* Go over qp list reside on that ibdev, sync with create/destroy qp.*/
        spin_lock_irqsave(&ibdev->reset_flow_resource_lock, flags);

        list_for_each_entry(mqp, &ibdev->qp_list, qps_list) {
                spin_lock_irqsave(&mqp->sq.lock, flags_qp);
                if (mqp->sq.tail != mqp->sq.head) {
                        send_mcq = to_mcq(mqp->ibqp.send_cq);
                        spin_lock_irqsave(&send_mcq->lock, flags_cq);
                        if (send_mcq->mcq.comp &&
                            mqp->ibqp.send_cq->comp_handler) {
                                if (!send_mcq->mcq.reset_notify_added) {
                                        send_mcq->mcq.reset_notify_added = 1;
                                        list_add_tail(&send_mcq->mcq.reset_notify,
                                                      &cq_notify_list);
                                }
                        }
                        spin_unlock_irqrestore(&send_mcq->lock, flags_cq);
                }
                spin_unlock_irqrestore(&mqp->sq.lock, flags_qp);
                /* Now, handle the QP's receive queue */
                spin_lock_irqsave(&mqp->rq.lock, flags_qp);
                /* no handling is needed for SRQ */
                if (!mqp->ibqp.srq) {
                        if (mqp->rq.tail != mqp->rq.head) {
                                recv_mcq = to_mcq(mqp->ibqp.recv_cq);
                                spin_lock_irqsave(&recv_mcq->lock, flags_cq);
                                if (recv_mcq->mcq.comp &&
                                    mqp->ibqp.recv_cq->comp_handler) {
                                        if (!recv_mcq->mcq.reset_notify_added) {
                                                recv_mcq->mcq.reset_notify_added = 1;
                                                list_add_tail(&recv_mcq->mcq.reset_notify,
                                                              &cq_notify_list);
                                        }
                                }
                                spin_unlock_irqrestore(&recv_mcq->lock,
                                                       flags_cq);
                        }
                }
                spin_unlock_irqrestore(&mqp->rq.lock, flags_qp);
        }

        list_for_each_entry(mcq, &cq_notify_list, reset_notify) {
                mcq->comp(mcq);
        }
        spin_unlock_irqrestore(&ibdev->reset_flow_resource_lock, flags);
        pr_warn("mlx4_ib_handle_catas_error ended\n");
}

static void handle_bonded_port_state_event(struct work_struct *work)
{
        struct ib_event_work *ew =
                container_of(work, struct ib_event_work, work);
        struct mlx4_ib_dev *ibdev = ew->ib_dev;
        enum ib_port_state bonded_port_state = IB_PORT_NOP;
        int i;
        struct ib_event ibev;

        kfree(ew);
        spin_lock_bh(&ibdev->iboe.lock);
        for (i = 0; i < MLX4_MAX_PORTS; ++i) {
                struct net_device *curr_netdev = ibdev->iboe.netdevs[i];
                enum ib_port_state curr_port_state;

                if (!curr_netdev)
                        continue;

                curr_port_state =
                        (netif_running(curr_netdev) &&
                         netif_carrier_ok(curr_netdev)) ?
                        IB_PORT_ACTIVE : IB_PORT_DOWN;

                bonded_port_state = (bonded_port_state != IB_PORT_ACTIVE) ?
                        curr_port_state : IB_PORT_ACTIVE;
        }
        spin_unlock_bh(&ibdev->iboe.lock);

        ibev.device = &ibdev->ib_dev;
        ibev.element.port_num = 1;
        ibev.event = (bonded_port_state == IB_PORT_ACTIVE) ?
                IB_EVENT_PORT_ACTIVE : IB_EVENT_PORT_ERR;

        ib_dispatch_event(&ibev);
}

static void mlx4_ib_event(struct mlx4_dev *dev, void *ibdev_ptr,
                          enum mlx4_dev_event event, unsigned long param)
{
        struct ib_event ibev;
        struct mlx4_ib_dev *ibdev = to_mdev((struct ib_device *) ibdev_ptr);
        struct mlx4_eqe *eqe = NULL;
        struct ib_event_work *ew;
        int p = 0;

        if (mlx4_is_bonded(dev) &&
            ((event == MLX4_DEV_EVENT_PORT_UP) ||
            (event == MLX4_DEV_EVENT_PORT_DOWN))) {
                ew = kmalloc(sizeof(*ew), GFP_ATOMIC);
                if (!ew)
                        return;
                INIT_WORK(&ew->work, handle_bonded_port_state_event);
                ew->ib_dev = ibdev;
                queue_work(wq, &ew->work);
                return;
        }

        if (event == MLX4_DEV_EVENT_PORT_MGMT_CHANGE)
                eqe = (struct mlx4_eqe *)param;
        else
                p = (int) param;

        switch (event) {
        case MLX4_DEV_EVENT_PORT_UP:
                if (p > ibdev->num_ports)
                        return;
                if (mlx4_is_master(dev) &&
                    rdma_port_get_link_layer(&ibdev->ib_dev, p) ==
                        IB_LINK_LAYER_INFINIBAND) {
                        mlx4_ib_invalidate_all_guid_record(ibdev, p);
                }
                ibev.event = IB_EVENT_PORT_ACTIVE;
                break;

        case MLX4_DEV_EVENT_PORT_DOWN:
                if (p > ibdev->num_ports)
                        return;
                ibev.event = IB_EVENT_PORT_ERR;
                break;

        case MLX4_DEV_EVENT_CATASTROPHIC_ERROR:
                ibdev->ib_active = false;
                ibev.event = IB_EVENT_DEVICE_FATAL;
                mlx4_ib_handle_catas_error(ibdev);
                break;

        case MLX4_DEV_EVENT_PORT_MGMT_CHANGE:
                ew = kmalloc(sizeof *ew, GFP_ATOMIC);
                if (!ew) {
                        pr_err("failed to allocate memory for events work\n");
                        break;
                }

                INIT_WORK(&ew->work, handle_port_mgmt_change_event);
                memcpy(&ew->ib_eqe, eqe, sizeof *eqe);
                ew->ib_dev = ibdev;
                /* need to queue only for port owner, which uses GEN_EQE */
                if (mlx4_is_master(dev))
                        queue_work(wq, &ew->work);
                else
                        handle_port_mgmt_change_event(&ew->work);
                return;

        case MLX4_DEV_EVENT_SLAVE_INIT:
                /* here, p is the slave id */
                do_slave_init(ibdev, p, 1);
                if (mlx4_is_master(dev)) {
                        int i;

                        for (i = 1; i <= ibdev->num_ports; i++) {
                                if (rdma_port_get_link_layer(&ibdev->ib_dev, i)
                                        == IB_LINK_LAYER_INFINIBAND)
                                        mlx4_ib_slave_alias_guid_event(ibdev,
                                                                       p, i,
                                                                       1);
                        }
                }
                return;

        case MLX4_DEV_EVENT_SLAVE_SHUTDOWN:
                if (mlx4_is_master(dev)) {
                        int i;

                        for (i = 1; i <= ibdev->num_ports; i++) {
                                if (rdma_port_get_link_layer(&ibdev->ib_dev, i)
                                        == IB_LINK_LAYER_INFINIBAND)
                                        mlx4_ib_slave_alias_guid_event(ibdev,
                                                                       p, i,
                                                                       0);
                        }
                }
                /* here, p is the slave id */
                do_slave_init(ibdev, p, 0);
                return;

        default:
                return;
        }

        ibev.device           = ibdev_ptr;
        ibev.element.port_num = mlx4_is_bonded(ibdev->dev) ? 1 : (u8)p;

        ib_dispatch_event(&ibev);
}

static struct mlx4_interface mlx4_ib_interface = {
        .add            = mlx4_ib_add,
        .remove         = mlx4_ib_remove,
        .event          = mlx4_ib_event,
        .protocol       = MLX4_PROT_IB_IPV6,
        .flags          = MLX4_INTFF_BONDING
};

static int __init mlx4_ib_init(void)
{
        int err;

        wq = create_singlethread_workqueue("mlx4_ib");
        if (!wq)
                return -ENOMEM;

        err = mlx4_ib_mcg_init();
        if (err)
                goto clean_wq;

        err = mlx4_register_interface(&mlx4_ib_interface);
        if (err)
                goto clean_mcg;

        return 0;

clean_mcg:
        mlx4_ib_mcg_destroy();

clean_wq:
        destroy_workqueue(wq);
        return err;
}

static void __exit mlx4_ib_cleanup(void)
{
        mlx4_unregister_interface(&mlx4_ib_interface);
        mlx4_ib_mcg_destroy();
        destroy_workqueue(wq);
}

module_init(mlx4_ib_init);
module_exit(mlx4_ib_cleanup);