mlx4_core: Use pci_request_regions()

[linux-2.6/linux-2.6-openrd.git] / drivers / net / mlx4 / main.c

/*
 * Copyright (c) 2004, 2005 Topspin Communications.  All rights reserved.
 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
 * Copyright (c) 2005, 2006, 2007, 2008 Mellanox Technologies. All rights reserved.
 * Copyright (c) 2006, 2007 Cisco Systems, Inc. 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/errno.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>

#include <linux/mlx4/device.h>
#include <linux/mlx4/doorbell.h>

#include "mlx4.h"
#include "fw.h"
#include "icm.h"

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

struct workqueue_struct *mlx4_wq;

#ifdef CONFIG_MLX4_DEBUG

int mlx4_debug_level = 0;
module_param_named(debug_level, mlx4_debug_level, int, 0644);
MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0");

#endif /* CONFIG_MLX4_DEBUG */

#ifdef CONFIG_PCI_MSI

static int msi_x = 1;
module_param(msi_x, int, 0444);
MODULE_PARM_DESC(msi_x, "attempt to use MSI-X if nonzero");

#else /* CONFIG_PCI_MSI */

#define msi_x (0)

#endif /* CONFIG_PCI_MSI */

static char mlx4_version[] __devinitdata =
        DRV_NAME ": Mellanox ConnectX core driver v"
        DRV_VERSION " (" DRV_RELDATE ")\n";

static struct mlx4_profile default_profile = {
        .num_qp         = 1 << 17,
        .num_srq        = 1 << 16,
        .rdmarc_per_qp  = 1 << 4,
        .num_cq         = 1 << 16,
        .num_mcg        = 1 << 13,
        .num_mpt        = 1 << 17,
        .num_mtt        = 1 << 20,
};

static int log_num_mac = 2;
module_param_named(log_num_mac, log_num_mac, int, 0444);
MODULE_PARM_DESC(log_num_mac, "Log2 max number of MACs per ETH port (1-7)");

static int log_num_vlan;
module_param_named(log_num_vlan, log_num_vlan, int, 0444);
MODULE_PARM_DESC(log_num_vlan, "Log2 max number of VLANs per ETH port (0-7)");

static int use_prio;
module_param_named(use_prio, use_prio, bool, 0444);
MODULE_PARM_DESC(use_prio, "Enable steering by VLAN priority on ETH ports "
                  "(0/1, default 0)");

static int log_mtts_per_seg = ilog2(MLX4_MTT_ENTRY_PER_SEG);
module_param_named(log_mtts_per_seg, log_mtts_per_seg, int, 0444);
MODULE_PARM_DESC(log_mtts_per_seg, "Log2 number of MTT entries per segment (1-5)");

int mlx4_check_port_params(struct mlx4_dev *dev,
                           enum mlx4_port_type *port_type)
{
        int i;

        for (i = 0; i < dev->caps.num_ports - 1; i++) {
                if (port_type[i] != port_type[i + 1]) {
                        if (!(dev->caps.flags & MLX4_DEV_CAP_FLAG_DPDP)) {
                                mlx4_err(dev, "Only same port types supported "
                                         "on this HCA, aborting.\n");
                                return -EINVAL;
                        }
                        if (port_type[i] == MLX4_PORT_TYPE_ETH &&
                            port_type[i + 1] == MLX4_PORT_TYPE_IB)
                                return -EINVAL;
                }
        }

        for (i = 0; i < dev->caps.num_ports; i++) {
                if (!(port_type[i] & dev->caps.supported_type[i+1])) {
                        mlx4_err(dev, "Requested port type for port %d is not "
                                      "supported on this HCA\n", i + 1);
                        return -EINVAL;
                }
        }
        return 0;
}

static void mlx4_set_port_mask(struct mlx4_dev *dev)
{
        int i;

        dev->caps.port_mask = 0;
        for (i = 1; i <= dev->caps.num_ports; ++i)
                if (dev->caps.port_type[i] == MLX4_PORT_TYPE_IB)
                        dev->caps.port_mask |= 1 << (i - 1);
}
static int mlx4_dev_cap(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap)
{
        int err;
        int i;

        err = mlx4_QUERY_DEV_CAP(dev, dev_cap);
        if (err) {
                mlx4_err(dev, "QUERY_DEV_CAP command failed, aborting.\n");
                return err;
        }

        if (dev_cap->min_page_sz > PAGE_SIZE) {
                mlx4_err(dev, "HCA minimum page size of %d bigger than "
                         "kernel PAGE_SIZE of %ld, aborting.\n",
                         dev_cap->min_page_sz, PAGE_SIZE);
                return -ENODEV;
        }
        if (dev_cap->num_ports > MLX4_MAX_PORTS) {
                mlx4_err(dev, "HCA has %d ports, but we only support %d, "
                         "aborting.\n",
                         dev_cap->num_ports, MLX4_MAX_PORTS);
                return -ENODEV;
        }

        if (dev_cap->uar_size > pci_resource_len(dev->pdev, 2)) {
                mlx4_err(dev, "HCA reported UAR size of 0x%x bigger than "
                         "PCI resource 2 size of 0x%llx, aborting.\n",
                         dev_cap->uar_size,
                         (unsigned long long) pci_resource_len(dev->pdev, 2));
                return -ENODEV;
        }

        dev->caps.num_ports          = dev_cap->num_ports;
        for (i = 1; i <= dev->caps.num_ports; ++i) {
                dev->caps.vl_cap[i]         = dev_cap->max_vl[i];
                dev->caps.ib_mtu_cap[i]     = dev_cap->ib_mtu[i];
                dev->caps.gid_table_len[i]  = dev_cap->max_gids[i];
                dev->caps.pkey_table_len[i] = dev_cap->max_pkeys[i];
                dev->caps.port_width_cap[i] = dev_cap->max_port_width[i];
                dev->caps.eth_mtu_cap[i]    = dev_cap->eth_mtu[i];
                dev->caps.def_mac[i]        = dev_cap->def_mac[i];
                dev->caps.supported_type[i] = dev_cap->supported_port_types[i];
        }

        dev->caps.num_uars           = dev_cap->uar_size / PAGE_SIZE;
        dev->caps.local_ca_ack_delay = dev_cap->local_ca_ack_delay;
        dev->caps.bf_reg_size        = dev_cap->bf_reg_size;
        dev->caps.bf_regs_per_page   = dev_cap->bf_regs_per_page;
        dev->caps.max_sq_sg          = dev_cap->max_sq_sg;
        dev->caps.max_rq_sg          = dev_cap->max_rq_sg;
        dev->caps.max_wqes           = dev_cap->max_qp_sz;
        dev->caps.max_qp_init_rdma   = dev_cap->max_requester_per_qp;
        dev->caps.max_srq_wqes       = dev_cap->max_srq_sz;
        dev->caps.max_srq_sge        = dev_cap->max_rq_sg - 1;
        dev->caps.reserved_srqs      = dev_cap->reserved_srqs;
        dev->caps.max_sq_desc_sz     = dev_cap->max_sq_desc_sz;
        dev->caps.max_rq_desc_sz     = dev_cap->max_rq_desc_sz;
        dev->caps.num_qp_per_mgm     = MLX4_QP_PER_MGM;
        /*
         * Subtract 1 from the limit because we need to allocate a
         * spare CQE so the HCA HW can tell the difference between an
         * empty CQ and a full CQ.
         */
        dev->caps.max_cqes           = dev_cap->max_cq_sz - 1;
        dev->caps.reserved_cqs       = dev_cap->reserved_cqs;
        dev->caps.reserved_eqs       = dev_cap->reserved_eqs;
        dev->caps.mtts_per_seg       = 1 << log_mtts_per_seg;
        dev->caps.reserved_mtts      = DIV_ROUND_UP(dev_cap->reserved_mtts,
                                                    dev->caps.mtts_per_seg);
        dev->caps.reserved_mrws      = dev_cap->reserved_mrws;
        dev->caps.reserved_uars      = dev_cap->reserved_uars;
        dev->caps.reserved_pds       = dev_cap->reserved_pds;
        dev->caps.mtt_entry_sz       = dev->caps.mtts_per_seg * dev_cap->mtt_entry_sz;
        dev->caps.max_msg_sz         = dev_cap->max_msg_sz;
        dev->caps.page_size_cap      = ~(u32) (dev_cap->min_page_sz - 1);
        dev->caps.flags              = dev_cap->flags;
        dev->caps.bmme_flags         = dev_cap->bmme_flags;
        dev->caps.reserved_lkey      = dev_cap->reserved_lkey;
        dev->caps.stat_rate_support  = dev_cap->stat_rate_support;
        dev->caps.max_gso_sz         = dev_cap->max_gso_sz;

        dev->caps.log_num_macs  = log_num_mac;
        dev->caps.log_num_vlans = log_num_vlan;
        dev->caps.log_num_prios = use_prio ? 3 : 0;

        for (i = 1; i <= dev->caps.num_ports; ++i) {
                if (dev->caps.supported_type[i] != MLX4_PORT_TYPE_ETH)
                        dev->caps.port_type[i] = MLX4_PORT_TYPE_IB;
                else
                        dev->caps.port_type[i] = MLX4_PORT_TYPE_ETH;
                dev->caps.possible_type[i] = dev->caps.port_type[i];
                mlx4_priv(dev)->sense.sense_allowed[i] =
                        dev->caps.supported_type[i] == MLX4_PORT_TYPE_AUTO;

                if (dev->caps.log_num_macs > dev_cap->log_max_macs[i]) {
                        dev->caps.log_num_macs = dev_cap->log_max_macs[i];
                        mlx4_warn(dev, "Requested number of MACs is too much "
                                  "for port %d, reducing to %d.\n",
                                  i, 1 << dev->caps.log_num_macs);
                }
                if (dev->caps.log_num_vlans > dev_cap->log_max_vlans[i]) {
                        dev->caps.log_num_vlans = dev_cap->log_max_vlans[i];
                        mlx4_warn(dev, "Requested number of VLANs is too much "
                                  "for port %d, reducing to %d.\n",
                                  i, 1 << dev->caps.log_num_vlans);
                }
        }

        mlx4_set_port_mask(dev);

        dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FW] = dev_cap->reserved_qps;
        dev->caps.reserved_qps_cnt[MLX4_QP_REGION_ETH_ADDR] =
                dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FC_ADDR] =
                (1 << dev->caps.log_num_macs) *
                (1 << dev->caps.log_num_vlans) *
                (1 << dev->caps.log_num_prios) *
                dev->caps.num_ports;
        dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FC_EXCH] = MLX4_NUM_FEXCH;

        dev->caps.reserved_qps = dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FW] +
                dev->caps.reserved_qps_cnt[MLX4_QP_REGION_ETH_ADDR] +
                dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FC_ADDR] +
                dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FC_EXCH];

        return 0;
}

/*
 * Change the port configuration of the device.
 * Every user of this function must hold the port mutex.
 */
int mlx4_change_port_types(struct mlx4_dev *dev,
                           enum mlx4_port_type *port_types)
{
        int err = 0;
        int change = 0;
        int port;

        for (port = 0; port <  dev->caps.num_ports; port++) {
                /* Change the port type only if the new type is different
                 * from the current, and not set to Auto */
                if (port_types[port] != dev->caps.port_type[port + 1]) {
                        change = 1;
                        dev->caps.port_type[port + 1] = port_types[port];
                }
        }
        if (change) {
                mlx4_unregister_device(dev);
                for (port = 1; port <= dev->caps.num_ports; port++) {
                        mlx4_CLOSE_PORT(dev, port);
                        err = mlx4_SET_PORT(dev, port);
                        if (err) {
                                mlx4_err(dev, "Failed to set port %d, "
                                              "aborting\n", port);
                                goto out;
                        }
                }
                mlx4_set_port_mask(dev);
                err = mlx4_register_device(dev);
        }

out:
        return err;
}

static ssize_t show_port_type(struct device *dev,
                              struct device_attribute *attr,
                              char *buf)
{
        struct mlx4_port_info *info = container_of(attr, struct mlx4_port_info,
                                                   port_attr);
        struct mlx4_dev *mdev = info->dev;
        char type[8];

        sprintf(type, "%s",
                (mdev->caps.port_type[info->port] == MLX4_PORT_TYPE_IB) ?
                "ib" : "eth");
        if (mdev->caps.possible_type[info->port] == MLX4_PORT_TYPE_AUTO)
                sprintf(buf, "auto (%s)\n", type);
        else
                sprintf(buf, "%s\n", type);

        return strlen(buf);
}

static ssize_t set_port_type(struct device *dev,
                             struct device_attribute *attr,
                             const char *buf, size_t count)
{
        struct mlx4_port_info *info = container_of(attr, struct mlx4_port_info,
                                                   port_attr);
        struct mlx4_dev *mdev = info->dev;
        struct mlx4_priv *priv = mlx4_priv(mdev);
        enum mlx4_port_type types[MLX4_MAX_PORTS];
        enum mlx4_port_type new_types[MLX4_MAX_PORTS];
        int i;
        int err = 0;

        if (!strcmp(buf, "ib\n"))
                info->tmp_type = MLX4_PORT_TYPE_IB;
        else if (!strcmp(buf, "eth\n"))
                info->tmp_type = MLX4_PORT_TYPE_ETH;
        else if (!strcmp(buf, "auto\n"))
                info->tmp_type = MLX4_PORT_TYPE_AUTO;
        else {
                mlx4_err(mdev, "%s is not supported port type\n", buf);
                return -EINVAL;
        }

        mlx4_stop_sense(mdev);
        mutex_lock(&priv->port_mutex);
        /* Possible type is always the one that was delivered */
        mdev->caps.possible_type[info->port] = info->tmp_type;

        for (i = 0; i < mdev->caps.num_ports; i++) {
                types[i] = priv->port[i+1].tmp_type ? priv->port[i+1].tmp_type :
                                        mdev->caps.possible_type[i+1];
                if (types[i] == MLX4_PORT_TYPE_AUTO)
                        types[i] = mdev->caps.port_type[i+1];
        }

        if (!(mdev->caps.flags & MLX4_DEV_CAP_FLAG_DPDP)) {
                for (i = 1; i <= mdev->caps.num_ports; i++) {
                        if (mdev->caps.possible_type[i] == MLX4_PORT_TYPE_AUTO) {
                                mdev->caps.possible_type[i] = mdev->caps.port_type[i];
                                err = -EINVAL;
                        }
                }
        }
        if (err) {
                mlx4_err(mdev, "Auto sensing is not supported on this HCA. "
                               "Set only 'eth' or 'ib' for both ports "
                               "(should be the same)\n");
                goto out;
        }

        mlx4_do_sense_ports(mdev, new_types, types);

        err = mlx4_check_port_params(mdev, new_types);
        if (err)
                goto out;

        /* We are about to apply the changes after the configuration
         * was verified, no need to remember the temporary types
         * any more */
        for (i = 0; i < mdev->caps.num_ports; i++)
                priv->port[i + 1].tmp_type = 0;

        err = mlx4_change_port_types(mdev, new_types);

out:
        mlx4_start_sense(mdev);
        mutex_unlock(&priv->port_mutex);
        return err ? err : count;
}

static int mlx4_load_fw(struct mlx4_dev *dev)
{
        struct mlx4_priv *priv = mlx4_priv(dev);
        int err;

        priv->fw.fw_icm = mlx4_alloc_icm(dev, priv->fw.fw_pages,
                                         GFP_HIGHUSER | __GFP_NOWARN, 0);
        if (!priv->fw.fw_icm) {
                mlx4_err(dev, "Couldn't allocate FW area, aborting.\n");
                return -ENOMEM;
        }

        err = mlx4_MAP_FA(dev, priv->fw.fw_icm);
        if (err) {
                mlx4_err(dev, "MAP_FA command failed, aborting.\n");
                goto err_free;
        }

        err = mlx4_RUN_FW(dev);
        if (err) {
                mlx4_err(dev, "RUN_FW command failed, aborting.\n");
                goto err_unmap_fa;
        }

        return 0;

err_unmap_fa:
        mlx4_UNMAP_FA(dev);

err_free:
        mlx4_free_icm(dev, priv->fw.fw_icm, 0);
        return err;
}

static int mlx4_init_cmpt_table(struct mlx4_dev *dev, u64 cmpt_base,
                                int cmpt_entry_sz)
{
        struct mlx4_priv *priv = mlx4_priv(dev);
        int err;

        err = mlx4_init_icm_table(dev, &priv->qp_table.cmpt_table,
                                  cmpt_base +
                                  ((u64) (MLX4_CMPT_TYPE_QP *
                                          cmpt_entry_sz) << MLX4_CMPT_SHIFT),
                                  cmpt_entry_sz, dev->caps.num_qps,
                                  dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FW],
                                  0, 0);
        if (err)
                goto err;

        err = mlx4_init_icm_table(dev, &priv->srq_table.cmpt_table,
                                  cmpt_base +
                                  ((u64) (MLX4_CMPT_TYPE_SRQ *
                                          cmpt_entry_sz) << MLX4_CMPT_SHIFT),
                                  cmpt_entry_sz, dev->caps.num_srqs,
                                  dev->caps.reserved_srqs, 0, 0);
        if (err)
                goto err_qp;

        err = mlx4_init_icm_table(dev, &priv->cq_table.cmpt_table,
                                  cmpt_base +
                                  ((u64) (MLX4_CMPT_TYPE_CQ *
                                          cmpt_entry_sz) << MLX4_CMPT_SHIFT),
                                  cmpt_entry_sz, dev->caps.num_cqs,
                                  dev->caps.reserved_cqs, 0, 0);
        if (err)
                goto err_srq;

        err = mlx4_init_icm_table(dev, &priv->eq_table.cmpt_table,
                                  cmpt_base +
                                  ((u64) (MLX4_CMPT_TYPE_EQ *
                                          cmpt_entry_sz) << MLX4_CMPT_SHIFT),
                                  cmpt_entry_sz,
                                  dev->caps.num_eqs, dev->caps.num_eqs, 0, 0);
        if (err)
                goto err_cq;

        return 0;

err_cq:
        mlx4_cleanup_icm_table(dev, &priv->cq_table.cmpt_table);

err_srq:
        mlx4_cleanup_icm_table(dev, &priv->srq_table.cmpt_table);

err_qp:
        mlx4_cleanup_icm_table(dev, &priv->qp_table.cmpt_table);

err:
        return err;
}

static int mlx4_init_icm(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap,
                         struct mlx4_init_hca_param *init_hca, u64 icm_size)
{
        struct mlx4_priv *priv = mlx4_priv(dev);
        u64 aux_pages;
        int err;

        err = mlx4_SET_ICM_SIZE(dev, icm_size, &aux_pages);
        if (err) {
                mlx4_err(dev, "SET_ICM_SIZE command failed, aborting.\n");
                return err;
        }

        mlx4_dbg(dev, "%lld KB of HCA context requires %lld KB aux memory.\n",
                 (unsigned long long) icm_size >> 10,
                 (unsigned long long) aux_pages << 2);

        priv->fw.aux_icm = mlx4_alloc_icm(dev, aux_pages,
                                          GFP_HIGHUSER | __GFP_NOWARN, 0);
        if (!priv->fw.aux_icm) {
                mlx4_err(dev, "Couldn't allocate aux memory, aborting.\n");
                return -ENOMEM;
        }

        err = mlx4_MAP_ICM_AUX(dev, priv->fw.aux_icm);
        if (err) {
                mlx4_err(dev, "MAP_ICM_AUX command failed, aborting.\n");
                goto err_free_aux;
        }

        err = mlx4_init_cmpt_table(dev, init_hca->cmpt_base, dev_cap->cmpt_entry_sz);
        if (err) {
                mlx4_err(dev, "Failed to map cMPT context memory, aborting.\n");
                goto err_unmap_aux;
        }

        err = mlx4_map_eq_icm(dev, init_hca->eqc_base);
        if (err) {
                mlx4_err(dev, "Failed to map EQ context memory, aborting.\n");
                goto err_unmap_cmpt;
        }

        /*
         * Reserved MTT entries must be aligned up to a cacheline
         * boundary, since the FW will write to them, while the driver
         * writes to all other MTT entries. (The variable
         * dev->caps.mtt_entry_sz below is really the MTT segment
         * size, not the raw entry size)
         */
        dev->caps.reserved_mtts =
                ALIGN(dev->caps.reserved_mtts * dev->caps.mtt_entry_sz,
                      dma_get_cache_alignment()) / dev->caps.mtt_entry_sz;

        err = mlx4_init_icm_table(dev, &priv->mr_table.mtt_table,
                                  init_hca->mtt_base,
                                  dev->caps.mtt_entry_sz,
                                  dev->caps.num_mtt_segs,
                                  dev->caps.reserved_mtts, 1, 0);
        if (err) {
                mlx4_err(dev, "Failed to map MTT context memory, aborting.\n");
                goto err_unmap_eq;
        }

        err = mlx4_init_icm_table(dev, &priv->mr_table.dmpt_table,
                                  init_hca->dmpt_base,
                                  dev_cap->dmpt_entry_sz,
                                  dev->caps.num_mpts,
                                  dev->caps.reserved_mrws, 1, 1);
        if (err) {
                mlx4_err(dev, "Failed to map dMPT context memory, aborting.\n");
                goto err_unmap_mtt;
        }

        err = mlx4_init_icm_table(dev, &priv->qp_table.qp_table,
                                  init_hca->qpc_base,
                                  dev_cap->qpc_entry_sz,
                                  dev->caps.num_qps,
                                  dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FW],
                                  0, 0);
        if (err) {
                mlx4_err(dev, "Failed to map QP context memory, aborting.\n");
                goto err_unmap_dmpt;
        }

        err = mlx4_init_icm_table(dev, &priv->qp_table.auxc_table,
                                  init_hca->auxc_base,
                                  dev_cap->aux_entry_sz,
                                  dev->caps.num_qps,
                                  dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FW],
                                  0, 0);
        if (err) {
                mlx4_err(dev, "Failed to map AUXC context memory, aborting.\n");
                goto err_unmap_qp;
        }

        err = mlx4_init_icm_table(dev, &priv->qp_table.altc_table,
                                  init_hca->altc_base,
                                  dev_cap->altc_entry_sz,
                                  dev->caps.num_qps,
                                  dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FW],
                                  0, 0);
        if (err) {
                mlx4_err(dev, "Failed to map ALTC context memory, aborting.\n");
                goto err_unmap_auxc;
        }

        err = mlx4_init_icm_table(dev, &priv->qp_table.rdmarc_table,
                                  init_hca->rdmarc_base,
                                  dev_cap->rdmarc_entry_sz << priv->qp_table.rdmarc_shift,
                                  dev->caps.num_qps,
                                  dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FW],
                                  0, 0);
        if (err) {
                mlx4_err(dev, "Failed to map RDMARC context memory, aborting\n");
                goto err_unmap_altc;
        }

        err = mlx4_init_icm_table(dev, &priv->cq_table.table,
                                  init_hca->cqc_base,
                                  dev_cap->cqc_entry_sz,
                                  dev->caps.num_cqs,
                                  dev->caps.reserved_cqs, 0, 0);
        if (err) {
                mlx4_err(dev, "Failed to map CQ context memory, aborting.\n");
                goto err_unmap_rdmarc;
        }

        err = mlx4_init_icm_table(dev, &priv->srq_table.table,
                                  init_hca->srqc_base,
                                  dev_cap->srq_entry_sz,
                                  dev->caps.num_srqs,
                                  dev->caps.reserved_srqs, 0, 0);
        if (err) {
                mlx4_err(dev, "Failed to map SRQ context memory, aborting.\n");
                goto err_unmap_cq;
        }

        /*
         * It's not strictly required, but for simplicity just map the
         * whole multicast group table now.  The table isn't very big
         * and it's a lot easier than trying to track ref counts.
         */
        err = mlx4_init_icm_table(dev, &priv->mcg_table.table,
                                  init_hca->mc_base, MLX4_MGM_ENTRY_SIZE,
                                  dev->caps.num_mgms + dev->caps.num_amgms,
                                  dev->caps.num_mgms + dev->caps.num_amgms,
                                  0, 0);
        if (err) {
                mlx4_err(dev, "Failed to map MCG context memory, aborting.\n");
                goto err_unmap_srq;
        }

        return 0;

err_unmap_srq:
        mlx4_cleanup_icm_table(dev, &priv->srq_table.table);

err_unmap_cq:
        mlx4_cleanup_icm_table(dev, &priv->cq_table.table);

err_unmap_rdmarc:
        mlx4_cleanup_icm_table(dev, &priv->qp_table.rdmarc_table);

err_unmap_altc:
        mlx4_cleanup_icm_table(dev, &priv->qp_table.altc_table);

err_unmap_auxc:
        mlx4_cleanup_icm_table(dev, &priv->qp_table.auxc_table);

err_unmap_qp:
        mlx4_cleanup_icm_table(dev, &priv->qp_table.qp_table);

err_unmap_dmpt:
        mlx4_cleanup_icm_table(dev, &priv->mr_table.dmpt_table);

err_unmap_mtt:
        mlx4_cleanup_icm_table(dev, &priv->mr_table.mtt_table);

err_unmap_eq:
        mlx4_unmap_eq_icm(dev);

err_unmap_cmpt:
        mlx4_cleanup_icm_table(dev, &priv->eq_table.cmpt_table);
        mlx4_cleanup_icm_table(dev, &priv->cq_table.cmpt_table);
        mlx4_cleanup_icm_table(dev, &priv->srq_table.cmpt_table);
        mlx4_cleanup_icm_table(dev, &priv->qp_table.cmpt_table);

err_unmap_aux:
        mlx4_UNMAP_ICM_AUX(dev);

err_free_aux:
        mlx4_free_icm(dev, priv->fw.aux_icm, 0);

        return err;
}

static void mlx4_free_icms(struct mlx4_dev *dev)
{
        struct mlx4_priv *priv = mlx4_priv(dev);

        mlx4_cleanup_icm_table(dev, &priv->mcg_table.table);
        mlx4_cleanup_icm_table(dev, &priv->srq_table.table);
        mlx4_cleanup_icm_table(dev, &priv->cq_table.table);
        mlx4_cleanup_icm_table(dev, &priv->qp_table.rdmarc_table);
        mlx4_cleanup_icm_table(dev, &priv->qp_table.altc_table);
        mlx4_cleanup_icm_table(dev, &priv->qp_table.auxc_table);
        mlx4_cleanup_icm_table(dev, &priv->qp_table.qp_table);
        mlx4_cleanup_icm_table(dev, &priv->mr_table.dmpt_table);
        mlx4_cleanup_icm_table(dev, &priv->mr_table.mtt_table);
        mlx4_cleanup_icm_table(dev, &priv->eq_table.cmpt_table);
        mlx4_cleanup_icm_table(dev, &priv->cq_table.cmpt_table);
        mlx4_cleanup_icm_table(dev, &priv->srq_table.cmpt_table);
        mlx4_cleanup_icm_table(dev, &priv->qp_table.cmpt_table);
        mlx4_unmap_eq_icm(dev);

        mlx4_UNMAP_ICM_AUX(dev);
        mlx4_free_icm(dev, priv->fw.aux_icm, 0);
}

static void mlx4_close_hca(struct mlx4_dev *dev)
{
        mlx4_CLOSE_HCA(dev, 0);
        mlx4_free_icms(dev);
        mlx4_UNMAP_FA(dev);
        mlx4_free_icm(dev, mlx4_priv(dev)->fw.fw_icm, 0);
}

static int mlx4_init_hca(struct mlx4_dev *dev)
{
        struct mlx4_priv          *priv = mlx4_priv(dev);
        struct mlx4_adapter        adapter;
        struct mlx4_dev_cap        dev_cap;
        struct mlx4_mod_stat_cfg   mlx4_cfg;
        struct mlx4_profile        profile;
        struct mlx4_init_hca_param init_hca;
        u64 icm_size;
        int err;

        err = mlx4_QUERY_FW(dev);
        if (err) {
                if (err == -EACCES)
                        mlx4_info(dev, "non-primary physical function, skipping.\n");
                else
                        mlx4_err(dev, "QUERY_FW command failed, aborting.\n");
                return err;
        }

        err = mlx4_load_fw(dev);
        if (err) {
                mlx4_err(dev, "Failed to start FW, aborting.\n");
                return err;
        }

        mlx4_cfg.log_pg_sz_m = 1;
        mlx4_cfg.log_pg_sz = 0;
        err = mlx4_MOD_STAT_CFG(dev, &mlx4_cfg);
        if (err)
                mlx4_warn(dev, "Failed to override log_pg_sz parameter\n");

        err = mlx4_dev_cap(dev, &dev_cap);
        if (err) {
                mlx4_err(dev, "QUERY_DEV_CAP command failed, aborting.\n");
                goto err_stop_fw;
        }

        profile = default_profile;

        icm_size = mlx4_make_profile(dev, &profile, &dev_cap, &init_hca);
        if ((long long) icm_size < 0) {
                err = icm_size;
                goto err_stop_fw;
        }

        init_hca.log_uar_sz = ilog2(dev->caps.num_uars);

        err = mlx4_init_icm(dev, &dev_cap, &init_hca, icm_size);
        if (err)
                goto err_stop_fw;

        err = mlx4_INIT_HCA(dev, &init_hca);
        if (err) {
                mlx4_err(dev, "INIT_HCA command failed, aborting.\n");
                goto err_free_icm;
        }

        err = mlx4_QUERY_ADAPTER(dev, &adapter);
        if (err) {
                mlx4_err(dev, "QUERY_ADAPTER command failed, aborting.\n");
                goto err_close;
        }

        priv->eq_table.inta_pin = adapter.inta_pin;
        memcpy(dev->board_id, adapter.board_id, sizeof dev->board_id);

        return 0;

err_close:
        mlx4_close_hca(dev);

err_free_icm:
        mlx4_free_icms(dev);

err_stop_fw:
        mlx4_UNMAP_FA(dev);
        mlx4_free_icm(dev, priv->fw.fw_icm, 0);

        return err;
}

static int mlx4_setup_hca(struct mlx4_dev *dev)
{
        struct mlx4_priv *priv = mlx4_priv(dev);
        int err;
        int port;
        __be32 ib_port_default_caps;

        err = mlx4_init_uar_table(dev);
        if (err) {
                mlx4_err(dev, "Failed to initialize "
                         "user access region table, aborting.\n");
                return err;
        }

        err = mlx4_uar_alloc(dev, &priv->driver_uar);
        if (err) {
                mlx4_err(dev, "Failed to allocate driver access region, "
                         "aborting.\n");
                goto err_uar_table_free;
        }

        priv->kar = ioremap(priv->driver_uar.pfn << PAGE_SHIFT, PAGE_SIZE);
        if (!priv->kar) {
                mlx4_err(dev, "Couldn't map kernel access region, "
                         "aborting.\n");
                err = -ENOMEM;
                goto err_uar_free;
        }

        err = mlx4_init_pd_table(dev);
        if (err) {
                mlx4_err(dev, "Failed to initialize "
                         "protection domain table, aborting.\n");
                goto err_kar_unmap;
        }

        err = mlx4_init_mr_table(dev);
        if (err) {
                mlx4_err(dev, "Failed to initialize "
                         "memory region table, aborting.\n");
                goto err_pd_table_free;
        }

        err = mlx4_init_eq_table(dev);
        if (err) {
                mlx4_err(dev, "Failed to initialize "
                         "event queue table, aborting.\n");
                goto err_mr_table_free;
        }

        err = mlx4_cmd_use_events(dev);
        if (err) {
                mlx4_err(dev, "Failed to switch to event-driven "
                         "firmware commands, aborting.\n");
                goto err_eq_table_free;
        }

        err = mlx4_NOP(dev);
        if (err) {
                if (dev->flags & MLX4_FLAG_MSI_X) {
                        mlx4_warn(dev, "NOP command failed to generate MSI-X "
                                  "interrupt IRQ %d).\n",
                                  priv->eq_table.eq[dev->caps.num_comp_vectors].irq);
                        mlx4_warn(dev, "Trying again without MSI-X.\n");
                } else {
                        mlx4_err(dev, "NOP command failed to generate interrupt "
                                 "(IRQ %d), aborting.\n",
                                 priv->eq_table.eq[dev->caps.num_comp_vectors].irq);
                        mlx4_err(dev, "BIOS or ACPI interrupt routing problem?\n");
                }

                goto err_cmd_poll;
        }

        mlx4_dbg(dev, "NOP command IRQ test passed\n");

        err = mlx4_init_cq_table(dev);
        if (err) {
                mlx4_err(dev, "Failed to initialize "
                         "completion queue table, aborting.\n");
                goto err_cmd_poll;
        }

        err = mlx4_init_srq_table(dev);
        if (err) {
                mlx4_err(dev, "Failed to initialize "
                         "shared receive queue table, aborting.\n");
                goto err_cq_table_free;
        }

        err = mlx4_init_qp_table(dev);
        if (err) {
                mlx4_err(dev, "Failed to initialize "
                         "queue pair table, aborting.\n");
                goto err_srq_table_free;
        }

        err = mlx4_init_mcg_table(dev);
        if (err) {
                mlx4_err(dev, "Failed to initialize "
                         "multicast group table, aborting.\n");
                goto err_qp_table_free;
        }

        for (port = 1; port <= dev->caps.num_ports; port++) {
                ib_port_default_caps = 0;
                err = mlx4_get_port_ib_caps(dev, port, &ib_port_default_caps);
                if (err)
                        mlx4_warn(dev, "failed to get port %d default "
                                  "ib capabilities (%d). Continuing with "
                                  "caps = 0\n", port, err);
                dev->caps.ib_port_def_cap[port] = ib_port_default_caps;
                err = mlx4_SET_PORT(dev, port);
                if (err) {
                        mlx4_err(dev, "Failed to set port %d, aborting\n",
                                port);
                        goto err_mcg_table_free;
                }
        }

        return 0;

err_mcg_table_free:
        mlx4_cleanup_mcg_table(dev);

err_qp_table_free:
        mlx4_cleanup_qp_table(dev);

err_srq_table_free:
        mlx4_cleanup_srq_table(dev);

err_cq_table_free:
        mlx4_cleanup_cq_table(dev);

err_cmd_poll:
        mlx4_cmd_use_polling(dev);

err_eq_table_free:
        mlx4_cleanup_eq_table(dev);

err_mr_table_free:
        mlx4_cleanup_mr_table(dev);

err_pd_table_free:
        mlx4_cleanup_pd_table(dev);

err_kar_unmap:
        iounmap(priv->kar);

err_uar_free:
        mlx4_uar_free(dev, &priv->driver_uar);

err_uar_table_free:
        mlx4_cleanup_uar_table(dev);
        return err;
}

static void mlx4_enable_msi_x(struct mlx4_dev *dev)
{
        struct mlx4_priv *priv = mlx4_priv(dev);
        struct msix_entry *entries;
        int nreq;
        int err;
        int i;

        if (msi_x) {
                nreq = min_t(int, dev->caps.num_eqs - dev->caps.reserved_eqs,
                             num_possible_cpus() + 1);
                entries = kcalloc(nreq, sizeof *entries, GFP_KERNEL);
                if (!entries)
                        goto no_msi;

                for (i = 0; i < nreq; ++i)
                        entries[i].entry = i;

        retry:
                err = pci_enable_msix(dev->pdev, entries, nreq);
                if (err) {
                        /* Try again if at least 2 vectors are available */
                        if (err > 1) {
                                mlx4_info(dev, "Requested %d vectors, "
                                          "but only %d MSI-X vectors available, "
                                          "trying again\n", nreq, err);
                                nreq = err;
                                goto retry;
                        }
                        kfree(entries);
                        goto no_msi;
                }

                dev->caps.num_comp_vectors = nreq - 1;
                for (i = 0; i < nreq; ++i)
                        priv->eq_table.eq[i].irq = entries[i].vector;

                dev->flags |= MLX4_FLAG_MSI_X;

                kfree(entries);
                return;
        }

no_msi:
        dev->caps.num_comp_vectors = 1;

        for (i = 0; i < 2; ++i)
                priv->eq_table.eq[i].irq = dev->pdev->irq;
}

static int mlx4_init_port_info(struct mlx4_dev *dev, int port)
{
        struct mlx4_port_info *info = &mlx4_priv(dev)->port[port];
        int err = 0;

        info->dev = dev;
        info->port = port;
        mlx4_init_mac_table(dev, &info->mac_table);
        mlx4_init_vlan_table(dev, &info->vlan_table);

        sprintf(info->dev_name, "mlx4_port%d", port);
        info->port_attr.attr.name = info->dev_name;
        info->port_attr.attr.mode = S_IRUGO | S_IWUSR;
        info->port_attr.show      = show_port_type;
        info->port_attr.store     = set_port_type;

        err = device_create_file(&dev->pdev->dev, &info->port_attr);
        if (err) {
                mlx4_err(dev, "Failed to create file for port %d\n", port);
                info->port = -1;
        }

        return err;
}

static void mlx4_cleanup_port_info(struct mlx4_port_info *info)
{
        if (info->port < 0)
                return;

        device_remove_file(&info->dev->pdev->dev, &info->port_attr);
}

static int __mlx4_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
{
        struct mlx4_priv *priv;
        struct mlx4_dev *dev;
        int err;
        int port;

        printk(KERN_INFO PFX "Initializing %s\n",
               pci_name(pdev));

        err = pci_enable_device(pdev);
        if (err) {
                dev_err(&pdev->dev, "Cannot enable PCI device, "
                        "aborting.\n");
                return err;
        }

        /*
         * Check for BARs.  We expect 0: 1MB
         */
        if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM) ||
            pci_resource_len(pdev, 0) != 1 << 20) {
                dev_err(&pdev->dev, "Missing DCS, aborting.\n");
                err = -ENODEV;
                goto err_disable_pdev;
        }
        if (!(pci_resource_flags(pdev, 2) & IORESOURCE_MEM)) {
                dev_err(&pdev->dev, "Missing UAR, aborting.\n");
                err = -ENODEV;
                goto err_disable_pdev;
        }

        err = pci_request_regions(pdev, DRV_NAME);
        if (err) {
                dev_err(&pdev->dev, "Couldn't get PCI resources, aborting\n");
                goto err_disable_pdev;
        }

        pci_set_master(pdev);

        err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
        if (err) {
                dev_warn(&pdev->dev, "Warning: couldn't set 64-bit PCI DMA mask.\n");
                err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
                if (err) {
                        dev_err(&pdev->dev, "Can't set PCI DMA mask, aborting.\n");
                        goto err_release_regions;
                }
        }
        err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
        if (err) {
                dev_warn(&pdev->dev, "Warning: couldn't set 64-bit "
                         "consistent PCI DMA mask.\n");
                err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
                if (err) {
                        dev_err(&pdev->dev, "Can't set consistent PCI DMA mask, "
                                "aborting.\n");
                        goto err_release_regions;
                }
        }

        priv = kzalloc(sizeof *priv, GFP_KERNEL);
        if (!priv) {
                dev_err(&pdev->dev, "Device struct alloc failed, "
                        "aborting.\n");
                err = -ENOMEM;
                goto err_release_regions;
        }

        dev       = &priv->dev;
        dev->pdev = pdev;
        INIT_LIST_HEAD(&priv->ctx_list);
        spin_lock_init(&priv->ctx_lock);

        mutex_init(&priv->port_mutex);

        INIT_LIST_HEAD(&priv->pgdir_list);
        mutex_init(&priv->pgdir_mutex);

        /*
         * Now reset the HCA before we touch the PCI capabilities or
         * attempt a firmware command, since a boot ROM may have left
         * the HCA in an undefined state.
         */
        err = mlx4_reset(dev);
        if (err) {
                mlx4_err(dev, "Failed to reset HCA, aborting.\n");
                goto err_free_dev;
        }

        if (mlx4_cmd_init(dev)) {
                mlx4_err(dev, "Failed to init command interface, aborting.\n");
                goto err_free_dev;
        }

        err = mlx4_init_hca(dev);
        if (err)
                goto err_cmd;

        err = mlx4_alloc_eq_table(dev);
        if (err)
                goto err_close;

        mlx4_enable_msi_x(dev);

        err = mlx4_setup_hca(dev);
        if (err == -EBUSY && (dev->flags & MLX4_FLAG_MSI_X)) {
                dev->flags &= ~MLX4_FLAG_MSI_X;
                pci_disable_msix(pdev);
                err = mlx4_setup_hca(dev);
        }

        if (err)
                goto err_free_eq;

        for (port = 1; port <= dev->caps.num_ports; port++) {
                err = mlx4_init_port_info(dev, port);
                if (err)
                        goto err_port;
        }

        err = mlx4_register_device(dev);
        if (err)
                goto err_port;

        mlx4_sense_init(dev);
        mlx4_start_sense(dev);

        pci_set_drvdata(pdev, dev);

        return 0;

err_port:
        for (port = 1; port <= dev->caps.num_ports; port++)
                mlx4_cleanup_port_info(&priv->port[port]);

        mlx4_cleanup_mcg_table(dev);
        mlx4_cleanup_qp_table(dev);
        mlx4_cleanup_srq_table(dev);
        mlx4_cleanup_cq_table(dev);
        mlx4_cmd_use_polling(dev);
        mlx4_cleanup_eq_table(dev);
        mlx4_cleanup_mr_table(dev);
        mlx4_cleanup_pd_table(dev);
        mlx4_cleanup_uar_table(dev);

err_free_eq:
        mlx4_free_eq_table(dev);

err_close:
        if (dev->flags & MLX4_FLAG_MSI_X)
                pci_disable_msix(pdev);

        mlx4_close_hca(dev);

err_cmd:
        mlx4_cmd_cleanup(dev);

err_free_dev:
        kfree(priv);

err_release_regions:
        pci_release_regions(pdev);

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

static int __devinit mlx4_init_one(struct pci_dev *pdev,
                                   const struct pci_device_id *id)
{
        static int mlx4_version_printed;

        if (!mlx4_version_printed) {
                printk(KERN_INFO "%s", mlx4_version);
                ++mlx4_version_printed;
        }

        return __mlx4_init_one(pdev, id);
}

static void mlx4_remove_one(struct pci_dev *pdev)
{
        struct mlx4_dev  *dev  = pci_get_drvdata(pdev);
        struct mlx4_priv *priv = mlx4_priv(dev);
        int p;

        if (dev) {
                mlx4_stop_sense(dev);
                mlx4_unregister_device(dev);

                for (p = 1; p <= dev->caps.num_ports; p++) {
                        mlx4_cleanup_port_info(&priv->port[p]);
                        mlx4_CLOSE_PORT(dev, p);
                }

                mlx4_cleanup_mcg_table(dev);
                mlx4_cleanup_qp_table(dev);
                mlx4_cleanup_srq_table(dev);
                mlx4_cleanup_cq_table(dev);
                mlx4_cmd_use_polling(dev);
                mlx4_cleanup_eq_table(dev);
                mlx4_cleanup_mr_table(dev);
                mlx4_cleanup_pd_table(dev);

                iounmap(priv->kar);
                mlx4_uar_free(dev, &priv->driver_uar);
                mlx4_cleanup_uar_table(dev);
                mlx4_free_eq_table(dev);
                mlx4_close_hca(dev);
                mlx4_cmd_cleanup(dev);

                if (dev->flags & MLX4_FLAG_MSI_X)
                        pci_disable_msix(pdev);

                kfree(priv);
                pci_release_regions(pdev);
                pci_disable_device(pdev);
                pci_set_drvdata(pdev, NULL);
        }
}

int mlx4_restart_one(struct pci_dev *pdev)
{
        mlx4_remove_one(pdev);
        return __mlx4_init_one(pdev, NULL);
}

static struct pci_device_id mlx4_pci_table[] = {
        { PCI_VDEVICE(MELLANOX, 0x6340) }, /* MT25408 "Hermon" SDR */
        { PCI_VDEVICE(MELLANOX, 0x634a) }, /* MT25408 "Hermon" DDR */
        { PCI_VDEVICE(MELLANOX, 0x6354) }, /* MT25408 "Hermon" QDR */
        { PCI_VDEVICE(MELLANOX, 0x6732) }, /* MT25408 "Hermon" DDR PCIe gen2 */
        { PCI_VDEVICE(MELLANOX, 0x673c) }, /* MT25408 "Hermon" QDR PCIe gen2 */
        { PCI_VDEVICE(MELLANOX, 0x6368) }, /* MT25408 "Hermon" EN 10GigE */
        { PCI_VDEVICE(MELLANOX, 0x6750) }, /* MT25408 "Hermon" EN 10GigE PCIe gen2 */
        { PCI_VDEVICE(MELLANOX, 0x6372) }, /* MT25458 ConnectX EN 10GBASE-T 10GigE */
        { PCI_VDEVICE(MELLANOX, 0x675a) }, /* MT25458 ConnectX EN 10GBASE-T+Gen2 10GigE */
        { PCI_VDEVICE(MELLANOX, 0x6764) }, /* MT26468 ConnectX EN 10GigE PCIe gen2*/
        { 0, }
};

MODULE_DEVICE_TABLE(pci, mlx4_pci_table);

static struct pci_driver mlx4_driver = {
        .name           = DRV_NAME,
        .id_table       = mlx4_pci_table,
        .probe          = mlx4_init_one,
        .remove         = __devexit_p(mlx4_remove_one)
};

static int __init mlx4_verify_params(void)
{
        if ((log_num_mac < 0) || (log_num_mac > 7)) {
                printk(KERN_WARNING "mlx4_core: bad num_mac: %d\n", log_num_mac);
                return -1;
        }

        if ((log_num_vlan < 0) || (log_num_vlan > 7)) {
                printk(KERN_WARNING "mlx4_core: bad num_vlan: %d\n", log_num_vlan);
                return -1;
        }

        if ((log_mtts_per_seg < 1) || (log_mtts_per_seg > 5)) {
                printk(KERN_WARNING "mlx4_core: bad log_mtts_per_seg: %d\n", log_mtts_per_seg);
                return -1;
        }

        return 0;
}

static int __init mlx4_init(void)
{
        int ret;

        if (mlx4_verify_params())
                return -EINVAL;

        mlx4_catas_init();

        mlx4_wq = create_singlethread_workqueue("mlx4");
        if (!mlx4_wq)
                return -ENOMEM;

        ret = pci_register_driver(&mlx4_driver);
        return ret < 0 ? ret : 0;
}

static void __exit mlx4_cleanup(void)
{
        pci_unregister_driver(&mlx4_driver);
        destroy_workqueue(mlx4_wq);
}

module_init(mlx4_init);
module_exit(mlx4_cleanup);