/*
 * 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/slab.h>
#include <linux/io-mapping.h>
#include <linux/delay.h>
#include <linux/netdevice.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 int num_vfs;
module_param(num_vfs, int, 0444);
MODULE_PARM_DESC(num_vfs, "enable #num_vfs functions if num_vfs > 0");

static int probe_vf;
module_param(probe_vf, int, 0644);
MODULE_PARM_DESC(probe_vf, "number of vfs to probe by pf driver (num_vfs > 0)");

int mlx4_log_num_mgm_entry_size = 10;
module_param_named(log_num_mgm_entry_size,
                        mlx4_log_num_mgm_entry_size, int, 0444);
MODULE_PARM_DESC(log_num_mgm_entry_size, "log mgm size, that defines the num"
                                         " of qp per mcg, for example:"
                                         " 10 gives 248.range: 9<="
                                         " log_num_mgm_entry_size <= 12."
                                         " Not in use with device managed"
                                         " flow steering");

#define HCA_GLOBAL_CAP_MASK            0
#define PF_CONTEXT_BEHAVIOUR_MASK      0

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 << 18,
        .num_srq        = 1 << 16,
        .rdmarc_per_qp  = 1 << 4,
        .num_cq         = 1 << 16,
        .num_mcg        = 1 << 13,
        .num_mpt        = 1 << 19,
        .num_mtt        = 1 << 20, /* It is really num mtt segements */
};

static int log_num_mac = 7;
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)");
/* Log2 max number of VLANs per ETH port (0-7) */
#define MLX4_LOG_NUM_VLANS 7

static bool 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)");

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 (1-7)");

static int port_type_array[2] = {MLX4_PORT_TYPE_NONE, MLX4_PORT_TYPE_NONE};
static int arr_argc = 2;
module_param_array(port_type_array, int, &arr_argc, 0444);
MODULE_PARM_DESC(port_type_array, "Array of port types: HW_DEFAULT (0) is default "
                                "1 for IB, 2 for Ethernet");

struct mlx4_port_config {
        struct list_head list;
        enum mlx4_port_type port_type[MLX4_MAX_PORTS + 1];
        struct pci_dev *pdev;
};

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;
                        }
                }
        }

        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;

        for (i = 1; i <= dev->caps.num_ports; ++i)
                dev->caps.port_mask[i] = dev->caps.port_type[i];
}

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;
        dev->phys_caps.num_phys_eqs  = MLX4_MAX_EQ_NUM;
        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->phys_caps.gid_phys_table_len[i]  = dev_cap->max_gids[i];
                dev->phys_caps.pkey_phys_table_len[i] = dev_cap->max_pkeys[i];
                /* set gid and pkey table operating lengths by default
                 * to non-sriov values */
                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.suggested_type[i] = dev_cap->suggested_type[i];
                dev->caps.default_sense[i] = dev_cap->default_sense[i];
                dev->caps.trans_type[i]     = dev_cap->trans_type[i];
                dev->caps.vendor_oui[i]     = dev_cap->vendor_oui[i];
                dev->caps.wavelength[i]     = dev_cap->wavelength[i];
                dev->caps.trans_code[i]     = dev_cap->trans_code[i];
        }

        dev->caps.uar_page_size      = PAGE_SIZE;
        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;
        /*
         * 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.reserved_mtts      = dev_cap->reserved_mtts;
        dev->caps.reserved_mrws      = dev_cap->reserved_mrws;

        /* The first 128 UARs are used for EQ doorbells */
        dev->caps.reserved_uars      = max_t(int, 128, dev_cap->reserved_uars);
        dev->caps.reserved_pds       = dev_cap->reserved_pds;
        dev->caps.reserved_xrcds     = (dev->caps.flags & MLX4_DEV_CAP_FLAG_XRC) ?
                                        dev_cap->reserved_xrcds : 0;
        dev->caps.max_xrcds          = (dev->caps.flags & MLX4_DEV_CAP_FLAG_XRC) ?
                                        dev_cap->max_xrcds : 0;
        dev->caps.mtt_entry_sz       = 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.flags2             = dev_cap->flags2;
        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.max_rss_tbl_sz     = dev_cap->max_rss_tbl_sz;

        if (dev_cap->flags2 & MLX4_DEV_CAP_FLAG2_FS_EN) {
                dev->caps.steering_mode = MLX4_STEERING_MODE_DEVICE_MANAGED;
                dev->caps.num_qp_per_mgm = dev_cap->fs_max_num_qp_per_entry;
                dev->caps.fs_log_max_ucast_qp_range_size =
                        dev_cap->fs_log_max_ucast_qp_range_size;
        } else {
                if (dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_UC_STEER &&
                    dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_MC_STEER) {
                        dev->caps.steering_mode = MLX4_STEERING_MODE_B0;
                } else {
                        dev->caps.steering_mode = MLX4_STEERING_MODE_A0;

                        if (dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_UC_STEER ||
                            dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_MC_STEER)
                                mlx4_warn(dev, "Must have UC_STEER and MC_STEER flags "
                                                "set to use B0 steering. Falling back to A0 steering mode.\n");
                }
                dev->caps.num_qp_per_mgm = mlx4_get_qp_per_mgm(dev);
        }
        mlx4_dbg(dev, "Steering mode is: %s\n",
                 mlx4_steering_mode_str(dev->caps.steering_mode));

        /* Sense port always allowed on supported devices for ConnectX-1 and -2 */
        if (mlx4_priv(dev)->pci_dev_data & MLX4_PCI_DEV_FORCE_SENSE_PORT)
                dev->caps.flags |= MLX4_DEV_CAP_FLAG_SENSE_SUPPORT;
        /* Don't do sense port on multifunction devices (for now at least) */
        if (mlx4_is_mfunc(dev))
                dev->caps.flags &= ~MLX4_DEV_CAP_FLAG_SENSE_SUPPORT;

        dev->caps.log_num_macs  = log_num_mac;
        dev->caps.log_num_vlans = MLX4_LOG_NUM_VLANS;
        dev->caps.log_num_prios = use_prio ? 3 : 0;

        for (i = 1; i <= dev->caps.num_ports; ++i) {
                dev->caps.port_type[i] = MLX4_PORT_TYPE_NONE;
                if (dev->caps.supported_type[i]) {
                        /* if only ETH is supported - assign ETH */
                        if (dev->caps.supported_type[i] == MLX4_PORT_TYPE_ETH)
                                dev->caps.port_type[i] = MLX4_PORT_TYPE_ETH;
                        /* if only IB is supported, assign IB */
                        else if (dev->caps.supported_type[i] ==
                                 MLX4_PORT_TYPE_IB)
                                dev->caps.port_type[i] = MLX4_PORT_TYPE_IB;
                        else {
                                /* if IB and ETH are supported, we set the port
                                 * type according to user selection of port type;
                                 * if user selected none, take the FW hint */
                                if (port_type_array[i - 1] == MLX4_PORT_TYPE_NONE)
                                        dev->caps.port_type[i] = dev->caps.suggested_type[i] ?
                                                MLX4_PORT_TYPE_ETH : MLX4_PORT_TYPE_IB;
                                else
                                        dev->caps.port_type[i] = port_type_array[i - 1];
                        }
                }
                /*
                 * Link sensing is allowed on the port if 3 conditions are true:
                 * 1. Both protocols are supported on the port.
                 * 2. Different types are supported on the port
                 * 3. FW declared that it supports link sensing
                 */
                mlx4_priv(dev)->sense.sense_allowed[i] =
                        ((dev->caps.supported_type[i] == MLX4_PORT_TYPE_AUTO) &&
                         (dev->caps.flags & MLX4_DEV_CAP_FLAG_DPDP) &&
                         (dev->caps.flags & MLX4_DEV_CAP_FLAG_SENSE_SUPPORT));

                /*
                 * If "default_sense" bit is set, we move the port to "AUTO" mode
                 * and perform sense_port FW command to try and set the correct
                 * port type from beginning
                 */
                if (mlx4_priv(dev)->sense.sense_allowed[i] && dev->caps.default_sense[i]) {
                        enum mlx4_port_type sensed_port = MLX4_PORT_TYPE_NONE;
                        dev->caps.possible_type[i] = MLX4_PORT_TYPE_AUTO;
                        mlx4_SENSE_PORT(dev, i, &sensed_port);
                        if (sensed_port != MLX4_PORT_TYPE_NONE)
                                dev->caps.port_type[i] = sensed_port;
                } else {
                        dev->caps.possible_type[i] = dev->caps.port_type[i];
                }

                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);
                }
        }

        dev->caps.max_counters = 1 << ilog2(dev_cap->max_counters);

        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];

        dev->caps.sqp_demux = (mlx4_is_master(dev)) ? MLX4_MAX_NUM_SLAVES : 0;
        return 0;
}
/*The function checks if there are live vf, return the num of them*/
static int mlx4_how_many_lives_vf(struct mlx4_dev *dev)
{
        struct mlx4_priv *priv = mlx4_priv(dev);
        struct mlx4_slave_state *s_state;
        int i;
        int ret = 0;

        for (i = 1/*the ppf is 0*/; i < dev->num_slaves; ++i) {
                s_state = &priv->mfunc.master.slave_state[i];
                if (s_state->active && s_state->last_cmd !=
                    MLX4_COMM_CMD_RESET) {
                        mlx4_warn(dev, "%s: slave: %d is still active\n",
                                  __func__, i);
                        ret++;
                }
        }
        return ret;
}

int mlx4_get_parav_qkey(struct mlx4_dev *dev, u32 qpn, u32 *qkey)
{
        u32 qk = MLX4_RESERVED_QKEY_BASE;

        if (qpn >= dev->phys_caps.base_tunnel_sqpn + 8 * MLX4_MFUNC_MAX ||
            qpn < dev->phys_caps.base_proxy_sqpn)
                return -EINVAL;

        if (qpn >= dev->phys_caps.base_tunnel_sqpn)
                /* tunnel qp */
                qk += qpn - dev->phys_caps.base_tunnel_sqpn;
        else
                qk += qpn - dev->phys_caps.base_proxy_sqpn;
        *qkey = qk;
        return 0;
}
EXPORT_SYMBOL(mlx4_get_parav_qkey);

void mlx4_sync_pkey_table(struct mlx4_dev *dev, int slave, int port, int i, int val)
{
        struct mlx4_priv *priv = container_of(dev, struct mlx4_priv, dev);

        if (!mlx4_is_master(dev))
                return;

        priv->virt2phys_pkey[slave][port - 1][i] = val;
}
EXPORT_SYMBOL(mlx4_sync_pkey_table);

void mlx4_put_slave_node_guid(struct mlx4_dev *dev, int slave, __be64 guid)
{
        struct mlx4_priv *priv = container_of(dev, struct mlx4_priv, dev);

        if (!mlx4_is_master(dev))
                return;

        priv->slave_node_guids[slave] = guid;
}
EXPORT_SYMBOL(mlx4_put_slave_node_guid);

__be64 mlx4_get_slave_node_guid(struct mlx4_dev *dev, int slave)
{
        struct mlx4_priv *priv = container_of(dev, struct mlx4_priv, dev);

        if (!mlx4_is_master(dev))
                return 0;

        return priv->slave_node_guids[slave];
}
EXPORT_SYMBOL(mlx4_get_slave_node_guid);

int mlx4_is_slave_active(struct mlx4_dev *dev, int slave)
{
        struct mlx4_priv *priv = mlx4_priv(dev);
        struct mlx4_slave_state *s_slave;

        if (!mlx4_is_master(dev))
                return 0;

        s_slave = &priv->mfunc.master.slave_state[slave];
        return !!s_slave->active;
}
EXPORT_SYMBOL(mlx4_is_slave_active);

static int mlx4_slave_cap(struct mlx4_dev *dev)
{
        int                        err;
        u32                        page_size;
        struct mlx4_dev_cap        dev_cap;
        struct mlx4_func_cap       func_cap;
        struct mlx4_init_hca_param hca_param;
        int                        i;

        memset(&hca_param, 0, sizeof(hca_param));
        err = mlx4_QUERY_HCA(dev, &hca_param);
        if (err) {
                mlx4_err(dev, "QUERY_HCA command failed, aborting.\n");
                return err;
        }

        /*fail if the hca has an unknown capability */
        if ((hca_param.global_caps | HCA_GLOBAL_CAP_MASK) !=
            HCA_GLOBAL_CAP_MASK) {
                mlx4_err(dev, "Unknown hca global capabilities\n");
                return -ENOSYS;
        }

        mlx4_log_num_mgm_entry_size = hca_param.log_mc_entry_sz;

        memset(&dev_cap, 0, sizeof(dev_cap));
        dev->caps.max_qp_dest_rdma = 1 << hca_param.log_rd_per_qp;
        err = mlx4_dev_cap(dev, &dev_cap);
        if (err) {
                mlx4_err(dev, "QUERY_DEV_CAP command failed, aborting.\n");
                return err;
        }

        err = mlx4_QUERY_FW(dev);
        if (err)
                mlx4_err(dev, "QUERY_FW command failed: could not get FW version.\n");

        page_size = ~dev->caps.page_size_cap + 1;
        mlx4_warn(dev, "HCA minimum page size:%d\n", page_size);
        if (page_size > PAGE_SIZE) {
                mlx4_err(dev, "HCA minimum page size of %d bigger than "
                         "kernel PAGE_SIZE of %ld, aborting.\n",
                         page_size, PAGE_SIZE);
                return -ENODEV;
        }

        /* slave gets uar page size from QUERY_HCA fw command */
        dev->caps.uar_page_size = 1 << (hca_param.uar_page_sz + 12);

        /* TODO: relax this assumption */
        if (dev->caps.uar_page_size != PAGE_SIZE) {
                mlx4_err(dev, "UAR size:%d != kernel PAGE_SIZE of %ld\n",
                         dev->caps.uar_page_size, PAGE_SIZE);
                return -ENODEV;
        }

        memset(&func_cap, 0, sizeof(func_cap));
        err = mlx4_QUERY_FUNC_CAP(dev, 0, &func_cap);
        if (err) {
                mlx4_err(dev, "QUERY_FUNC_CAP general command failed, aborting (%d).\n",
                          err);
                return err;
        }

        if ((func_cap.pf_context_behaviour | PF_CONTEXT_BEHAVIOUR_MASK) !=
            PF_CONTEXT_BEHAVIOUR_MASK) {
                mlx4_err(dev, "Unknown pf context behaviour\n");
                return -ENOSYS;
        }

        dev->caps.num_ports             = func_cap.num_ports;
        dev->caps.num_qps               = func_cap.qp_quota;
        dev->caps.num_srqs              = func_cap.srq_quota;
        dev->caps.num_cqs               = func_cap.cq_quota;
        dev->caps.num_eqs               = func_cap.max_eq;
        dev->caps.reserved_eqs          = func_cap.reserved_eq;
        dev->caps.num_mpts              = func_cap.mpt_quota;
        dev->caps.num_mtts              = func_cap.mtt_quota;
        dev->caps.num_pds               = MLX4_NUM_PDS;
        dev->caps.num_mgms              = 0;
        dev->caps.num_amgms             = 0;

        if (dev->caps.num_ports > MLX4_MAX_PORTS) {
                mlx4_err(dev, "HCA has %d ports, but we only support %d, "
                         "aborting.\n", dev->caps.num_ports, MLX4_MAX_PORTS);
                return -ENODEV;
        }

        dev->caps.qp0_tunnel = kcalloc(dev->caps.num_ports, sizeof (u32), GFP_KERNEL);
        dev->caps.qp0_proxy = kcalloc(dev->caps.num_ports, sizeof (u32), GFP_KERNEL);
        dev->caps.qp1_tunnel = kcalloc(dev->caps.num_ports, sizeof (u32), GFP_KERNEL);
        dev->caps.qp1_proxy = kcalloc(dev->caps.num_ports, sizeof (u32), GFP_KERNEL);

        if (!dev->caps.qp0_tunnel || !dev->caps.qp0_proxy ||
            !dev->caps.qp1_tunnel || !dev->caps.qp1_proxy) {
                err = -ENOMEM;
                goto err_mem;
        }

        for (i = 1; i <= dev->caps.num_ports; ++i) {
                err = mlx4_QUERY_FUNC_CAP(dev, (u32) i, &func_cap);
                if (err) {
                        mlx4_err(dev, "QUERY_FUNC_CAP port command failed for"
                                 " port %d, aborting (%d).\n", i, err);
                        goto err_mem;
                }
                dev->caps.qp0_tunnel[i - 1] = func_cap.qp0_tunnel_qpn;
                dev->caps.qp0_proxy[i - 1] = func_cap.qp0_proxy_qpn;
                dev->caps.qp1_tunnel[i - 1] = func_cap.qp1_tunnel_qpn;
                dev->caps.qp1_proxy[i - 1] = func_cap.qp1_proxy_qpn;
                dev->caps.port_mask[i] = dev->caps.port_type[i];
                if (mlx4_get_slave_pkey_gid_tbl_len(dev, i,
                                                    &dev->caps.gid_table_len[i],
                                                    &dev->caps.pkey_table_len[i]))
                        goto err_mem;
        }

        if (dev->caps.uar_page_size * (dev->caps.num_uars -
                                       dev->caps.reserved_uars) >
                                       pci_resource_len(dev->pdev, 2)) {
                mlx4_err(dev, "HCA reported UAR region size of 0x%x bigger than "
                         "PCI resource 2 size of 0x%llx, aborting.\n",
                         dev->caps.uar_page_size * dev->caps.num_uars,
                         (unsigned long long) pci_resource_len(dev->pdev, 2));
                goto err_mem;
        }

        return 0;

err_mem:
        kfree(dev->caps.qp0_tunnel);
        kfree(dev->caps.qp0_proxy);
        kfree(dev->caps.qp1_tunnel);
        kfree(dev->caps.qp1_proxy);
        dev->caps.qp0_tunnel = dev->caps.qp0_proxy =
                dev->caps.qp1_tunnel = dev->caps.qp1_proxy = NULL;

        return err;
}

/*
 * 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;
        }
        if (change) {
                mlx4_unregister_device(dev);
                for (port = 1; port <= dev->caps.num_ports; port++) {
                        mlx4_CLOSE_PORT(dev, port);
                        dev->caps.port_type[port] = port_types[port - 1];
                        err = mlx4_SET_PORT(dev, port, -1);
                        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) &&
            !(mdev->caps.flags & MLX4_DEV_CAP_FLAG_SENSE_SUPPORT)) {
                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;
}

enum ibta_mtu {
        IB_MTU_256  = 1,
        IB_MTU_512  = 2,
        IB_MTU_1024 = 3,
        IB_MTU_2048 = 4,
        IB_MTU_4096 = 5
};

static inline int int_to_ibta_mtu(int mtu)
{
        switch (mtu) {
        case 256:  return IB_MTU_256;
        case 512:  return IB_MTU_512;
        case 1024: return IB_MTU_1024;
        case 2048: return IB_MTU_2048;
        case 4096: return IB_MTU_4096;
        default: return -1;
        }
}

static inline int ibta_mtu_to_int(enum ibta_mtu mtu)
{
        switch (mtu) {
        case IB_MTU_256:  return  256;
        case IB_MTU_512:  return  512;
        case IB_MTU_1024: return 1024;
        case IB_MTU_2048: return 2048;
        case IB_MTU_4096: return 4096;
        default: return -1;
        }
}

static ssize_t show_port_ib_mtu(struct device *dev,
                             struct device_attribute *attr,
                             char *buf)
{
        struct mlx4_port_info *info = container_of(attr, struct mlx4_port_info,
                                                   port_mtu_attr);
        struct mlx4_dev *mdev = info->dev;

        if (mdev->caps.port_type[info->port] == MLX4_PORT_TYPE_ETH)
                mlx4_warn(mdev, "port level mtu is only used for IB ports\n");

        sprintf(buf, "%d\n",
                        ibta_mtu_to_int(mdev->caps.port_ib_mtu[info->port]));
        return strlen(buf);
}

static ssize_t set_port_ib_mtu(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_mtu_attr);
        struct mlx4_dev *mdev = info->dev;
        struct mlx4_priv *priv = mlx4_priv(mdev);
        int err, port, mtu, ibta_mtu = -1;

        if (mdev->caps.port_type[info->port] == MLX4_PORT_TYPE_ETH) {
                mlx4_warn(mdev, "port level mtu is only used for IB ports\n");
                return -EINVAL;
        }

        err = sscanf(buf, "%d", &mtu);
        if (err > 0)
                ibta_mtu = int_to_ibta_mtu(mtu);

        if (err <= 0 || ibta_mtu < 0) {
                mlx4_err(mdev, "%s is invalid IBTA mtu\n", buf);
                return -EINVAL;
        }

        mdev->caps.port_ib_mtu[info->port] = ibta_mtu;

        mlx4_stop_sense(mdev);
        mutex_lock(&priv->port_mutex);
        mlx4_unregister_device(mdev);
        for (port = 1; port <= mdev->caps.num_ports; port++) {
                mlx4_CLOSE_PORT(mdev, port);
                err = mlx4_SET_PORT(mdev, port, -1);
                if (err) {
                        mlx4_err(mdev, "Failed to set port %d, "
                                      "aborting\n", port);
                        goto err_set_port;
                }
        }
        err = mlx4_register_device(mdev);
err_set_port:
        mutex_unlock(&priv->port_mutex);
        mlx4_start_sense(mdev);
        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;
        int num_eqs;

        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;

        num_eqs = (mlx4_is_master(dev)) ? dev->phys_caps.num_phys_eqs :
                  dev->caps.num_eqs;
        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, num_eqs, 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 num_eqs;
        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;
        }


        num_eqs = (mlx4_is_master(dev)) ? dev->phys_caps.num_phys_eqs :
                   dev->caps.num_eqs;
        err = mlx4_init_icm_table(dev, &priv->eq_table.table,
                                  init_hca->eqc_base, dev_cap->eqc_entry_sz,
                                  num_eqs, num_eqs, 0, 0);
        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_mtts,
                                  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;
        }

        /*
         * For flow steering device managed mode it is required to use
         * mlx4_init_icm_table. For B0 steering mode 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_get_mgm_entry_size(dev),
                                  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_cleanup_icm_table(dev, &priv->eq_table.table);

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

static void mlx4_slave_exit(struct mlx4_dev *dev)
{
        struct mlx4_priv *priv = mlx4_priv(dev);

        mutex_lock(&priv->cmd.slave_cmd_mutex);
        if (mlx4_comm_cmd(dev, MLX4_COMM_CMD_RESET, 0, MLX4_COMM_TIME))
                mlx4_warn(dev, "Failed to close slave function.\n");
        mutex_unlock(&priv->cmd.slave_cmd_mutex);
}

static int map_bf_area(struct mlx4_dev *dev)
{
        struct mlx4_priv *priv = mlx4_priv(dev);
        resource_size_t bf_start;
        resource_size_t bf_len;
        int err = 0;

        if (!dev->caps.bf_reg_size)
                return -ENXIO;

        bf_start = pci_resource_start(dev->pdev, 2) +
                        (dev->caps.num_uars << PAGE_SHIFT);
        bf_len = pci_resource_len(dev->pdev, 2) -
                        (dev->caps.num_uars << PAGE_SHIFT);
        priv->bf_mapping = io_mapping_create_wc(bf_start, bf_len);
        if (!priv->bf_mapping)
                err = -ENOMEM;

        return err;
}

static void unmap_bf_area(struct mlx4_dev *dev)
{
        if (mlx4_priv(dev)->bf_mapping)
                io_mapping_free(mlx4_priv(dev)->bf_mapping);
}

static void mlx4_close_hca(struct mlx4_dev *dev)
{
        unmap_bf_area(dev);
        if (mlx4_is_slave(dev))
                mlx4_slave_exit(dev);
        else {
                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_slave(struct mlx4_dev *dev)
{
        struct mlx4_priv *priv = mlx4_priv(dev);
        u64 dma = (u64) priv->mfunc.vhcr_dma;
        int num_of_reset_retries = NUM_OF_RESET_RETRIES;
        int ret_from_reset = 0;
        u32 slave_read;
        u32 cmd_channel_ver;

        mutex_lock(&priv->cmd.slave_cmd_mutex);
        priv->cmd.max_cmds = 1;
        mlx4_warn(dev, "Sending reset\n");
        ret_from_reset = mlx4_comm_cmd(dev, MLX4_COMM_CMD_RESET, 0,
                                       MLX4_COMM_TIME);
        /* if we are in the middle of flr the slave will try
         * NUM_OF_RESET_RETRIES times before leaving.*/
        if (ret_from_reset) {
                if (MLX4_DELAY_RESET_SLAVE == ret_from_reset) {
                        msleep(SLEEP_TIME_IN_RESET);
                        while (ret_from_reset && num_of_reset_retries) {
                                mlx4_warn(dev, "slave is currently in the"
                                          "middle of FLR. retrying..."
                                          "(try num:%d)\n",
                                          (NUM_OF_RESET_RETRIES -
                                           num_of_reset_retries  + 1));
                                ret_from_reset =
                                        mlx4_comm_cmd(dev, MLX4_COMM_CMD_RESET,
                                                      0, MLX4_COMM_TIME);
                                num_of_reset_retries = num_of_reset_retries - 1;
                        }
                } else
                        goto err;
        }

        /* check the driver version - the slave I/F revision
         * must match the master's */
        slave_read = swab32(readl(&priv->mfunc.comm->slave_read));
        cmd_channel_ver = mlx4_comm_get_version();

        if (MLX4_COMM_GET_IF_REV(cmd_channel_ver) !=
                MLX4_COMM_GET_IF_REV(slave_read)) {
                mlx4_err(dev, "slave driver version is not supported"
                         " by the master\n");
                goto err;
        }

        mlx4_warn(dev, "Sending vhcr0\n");
        if (mlx4_comm_cmd(dev, MLX4_COMM_CMD_VHCR0, dma >> 48,
                                                    MLX4_COMM_TIME))
                goto err;
        if (mlx4_comm_cmd(dev, MLX4_COMM_CMD_VHCR1, dma >> 32,
                                                    MLX4_COMM_TIME))
                goto err;
        if (mlx4_comm_cmd(dev, MLX4_COMM_CMD_VHCR2, dma >> 16,
                                                    MLX4_COMM_TIME))
                goto err;
        if (mlx4_comm_cmd(dev, MLX4_COMM_CMD_VHCR_EN, dma, MLX4_COMM_TIME))
                goto err;

        mutex_unlock(&priv->cmd.slave_cmd_mutex);
        return 0;

err:
        mlx4_comm_cmd(dev, MLX4_COMM_CMD_RESET, 0, 0);
        mutex_unlock(&priv->cmd.slave_cmd_mutex);
        return -EIO;
}

static void mlx4_parav_master_pf_caps(struct mlx4_dev *dev)
{
        int i;

        for (i = 1; i <= dev->caps.num_ports; i++) {
                dev->caps.gid_table_len[i] = 1;
                dev->caps.pkey_table_len[i] =
                        dev->phys_caps.pkey_phys_table_len[i] - 1;
        }
}

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;

        if (!mlx4_is_slave(dev)) {
                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;
                }

                if (mlx4_is_master(dev))
                        mlx4_parav_master_pf_caps(dev);

                priv->fs_hash_mode = MLX4_FS_L2_HASH;

                switch (priv->fs_hash_mode) {
                case MLX4_FS_L2_HASH:
                        init_hca.fs_hash_enable_bits = 0;
                        break;

                case MLX4_FS_L2_L3_L4_HASH:
                        /* Enable flow steering with
                         * udp unicast and tcp unicast
                         */
                        init_hca.fs_hash_enable_bits =
                                MLX4_FS_UDP_UC_EN | MLX4_FS_TCP_UC_EN;
                        break;
                }

                profile = default_profile;
                if (dev->caps.steering_mode ==
                    MLX4_STEERING_MODE_DEVICE_MANAGED)
                        profile.num_mcg = MLX4_FS_NUM_MCG;

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

                dev->caps.max_fmr_maps = (1 << (32 - ilog2(dev->caps.num_mpts))) - 1;

                init_hca.log_uar_sz = ilog2(dev->caps.num_uars);
                init_hca.uar_page_sz = PAGE_SHIFT - 12;

                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;
                }
        } else {
                err = mlx4_init_slave(dev);
                if (err) {
                        mlx4_err(dev, "Failed to initialize slave\n");
                        return err;
                }

                err = mlx4_slave_cap(dev);
                if (err) {
                        mlx4_err(dev, "Failed to obtain slave caps\n");
                        goto err_close;
                }
        }

        if (map_bf_area(dev))
                mlx4_dbg(dev, "Failed to map blue flame area\n");

        /*Only the master set the ports, all the rest got it from it.*/
        if (!mlx4_is_slave(dev))
                mlx4_set_port_mask(dev);

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

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

        return 0;

unmap_bf:
        unmap_bf_area(dev);

err_close:
        if (mlx4_is_slave(dev))
                mlx4_slave_exit(dev);
        else
                mlx4_CLOSE_HCA(dev, 0);

err_free_icm:
        if (!mlx4_is_slave(dev))
                mlx4_free_icms(dev);

err_stop_fw:
        if (!mlx4_is_slave(dev)) {
                mlx4_UNMAP_FA(dev);
                mlx4_free_icm(dev, priv->fw.fw_icm, 0);
        }
        return err;
}

static int mlx4_init_counters_table(struct mlx4_dev *dev)
{
        struct mlx4_priv *priv = mlx4_priv(dev);
        int nent;

        if (!(dev->caps.flags & MLX4_DEV_CAP_FLAG_COUNTERS))
                return -ENOENT;

        nent = dev->caps.max_counters;
        return mlx4_bitmap_init(&priv->counters_bitmap, nent, nent - 1, 0, 0);
}

static void mlx4_cleanup_counters_table(struct mlx4_dev *dev)
{
        mlx4_bitmap_cleanup(&mlx4_priv(dev)->counters_bitmap);
}

int __mlx4_counter_alloc(struct mlx4_dev *dev, u32 *idx)
{
        struct mlx4_priv *priv = mlx4_priv(dev);

        if (!(dev->caps.flags & MLX4_DEV_CAP_FLAG_COUNTERS))
                return -ENOENT;

        *idx = mlx4_bitmap_alloc(&priv->counters_bitmap);
        if (*idx == -1)
                return -ENOMEM;

        return 0;
}

int mlx4_counter_alloc(struct mlx4_dev *dev, u32 *idx)
{
        u64 out_param;
        int err;

        if (mlx4_is_mfunc(dev)) {
                err = mlx4_cmd_imm(dev, 0, &out_param, RES_COUNTER,
                                   RES_OP_RESERVE, MLX4_CMD_ALLOC_RES,
                                   MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);
                if (!err)
                        *idx = get_param_l(&out_param);

                return err;
        }
        return __mlx4_counter_alloc(dev, idx);
}
EXPORT_SYMBOL_GPL(mlx4_counter_alloc);

void __mlx4_counter_free(struct mlx4_dev *dev, u32 idx)
{
        mlx4_bitmap_free(&mlx4_priv(dev)->counters_bitmap, idx);
        return;
}

void mlx4_counter_free(struct mlx4_dev *dev, u32 idx)
{
        u64 in_param;

        if (mlx4_is_mfunc(dev)) {
                set_param_l(&in_param, idx);
                mlx4_cmd(dev, in_param, RES_COUNTER, RES_OP_RESERVE,
                         MLX4_CMD_FREE_RES, MLX4_CMD_TIME_CLASS_A,
                         MLX4_CMD_WRAPPED);
                return;
        }
        __mlx4_counter_free(dev, idx);
}
EXPORT_SYMBOL_GPL(mlx4_counter_free);

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((phys_addr_t) 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_xrcd_table(dev);
        if (err) {
                mlx4_err(dev, "Failed to initialize "
                         "reliable connection domain table, aborting.\n");
                goto err_pd_table_free;
        }

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

        if (!mlx4_is_slave(dev)) {
                err = mlx4_init_mcg_table(dev);
                if (err) {
                        mlx4_err(dev, "Failed to initialize "
                                 "multicast group table, aborting.\n");
                        goto err_qp_table_free;
                }
        }

        err = mlx4_init_counters_table(dev);
        if (err && err != -ENOENT) {
                mlx4_err(dev, "Failed to initialize counters table, aborting.\n");
                goto err_mcg_table_free;
        }

        if (!mlx4_is_slave(dev)) {
                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;

                        /* initialize per-slave default ib port capabilities */
                        if (mlx4_is_master(dev)) {
                                int i;
                                for (i = 0; i < dev->num_slaves; i++) {
                                        if (i == mlx4_master_func_num(dev))
                                                continue;
                                        priv->mfunc.master.slave_state[i].ib_cap_mask[port] =
                                                        ib_port_default_caps;
                                }
                        }

                        if (mlx4_is_mfunc(dev))
                                dev->caps.port_ib_mtu[port] = IB_MTU_2048;
                        else
                                dev->caps.port_ib_mtu[port] = IB_MTU_4096;

                        err = mlx4_SET_PORT(dev, port, mlx4_is_master(dev) ?
                                            dev->caps.pkey_table_len[port] : -1);
                        if (err) {
                                mlx4_err(dev, "Failed to set port %d, aborting\n",
                                        port);
                                goto err_counters_table_free;
                        }
                }
        }

        return 0;

err_counters_table_free:
        mlx4_cleanup_counters_table(dev);

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_xrcd_table_free:
        mlx4_cleanup_xrcd_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 = min_t(int, dev->caps.num_ports *
                         min_t(int, netif_get_num_default_rss_queues() + 1,
                               MAX_MSIX_P_PORT) + MSIX_LEGACY_SZ, MAX_MSIX);
        int err;
        int i;

        if (msi_x) {
                /* In multifunction mode each function gets 2 msi-X vectors
                 * one for data path completions anf the other for asynch events
                 * or command completions */
                if (mlx4_is_mfunc(dev)) {
                        nreq = 2;
                } else {
                        nreq = min_t(int, dev->caps.num_eqs -
                                     dev->caps.reserved_eqs, nreq);
                }

                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;
                }

                if (nreq <
                    MSIX_LEGACY_SZ + dev->caps.num_ports * MIN_MSIX_P_PORT) {
                        /*Working in legacy mode , all EQ's shared*/
                        dev->caps.comp_pool           = 0;
                        dev->caps.num_comp_vectors = nreq - 1;
                } else {
                        dev->caps.comp_pool           = nreq - MSIX_LEGACY_SZ;
                        dev->caps.num_comp_vectors = MSIX_LEGACY_SZ - 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;
        dev->caps.comp_pool        = 0;

        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;
        if (!mlx4_is_slave(dev)) {
                INIT_RADIX_TREE(&info->mac_tree, GFP_KERNEL);
                mlx4_init_mac_table(dev, &info->mac_table);
                mlx4_init_vlan_table(dev, &info->vlan_table);
                info->base_qpn =
                        dev->caps.reserved_qps_base[MLX4_QP_REGION_ETH_ADDR] +
                        (port - 1) * (1 << log_num_mac);
        }

        sprintf(info->dev_name, "mlx4_port%d", port);
        info->port_attr.attr.name = info->dev_name;
        if (mlx4_is_mfunc(dev))
                info->port_attr.attr.mode = S_IRUGO;
        else {
                info->port_attr.attr.mode = S_IRUGO | S_IWUSR;
                info->port_attr.store     = set_port_type;
        }
        info->port_attr.show      = show_port_type;
        sysfs_attr_init(&info->port_attr.attr);

        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;
        }

        sprintf(info->dev_mtu_name, "mlx4_port%d_mtu", port);
        info->port_mtu_attr.attr.name = info->dev_mtu_name;
        if (mlx4_is_mfunc(dev))
                info->port_mtu_attr.attr.mode = S_IRUGO;
        else {
                info->port_mtu_attr.attr.mode = S_IRUGO | S_IWUSR;
                info->port_mtu_attr.store     = set_port_ib_mtu;
        }
        info->port_mtu_attr.show      = show_port_ib_mtu;
        sysfs_attr_init(&info->port_mtu_attr.attr);

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

static int mlx4_init_steering(struct mlx4_dev *dev)
{
        struct mlx4_priv *priv = mlx4_priv(dev);
        int num_entries = dev->caps.num_ports;
        int i, j;

        priv->steer = kzalloc(sizeof(struct mlx4_steer) * num_entries, GFP_KERNEL);
        if (!priv->steer)
                return -ENOMEM;

        for (i = 0; i < num_entries; i++)
                for (j = 0; j < MLX4_NUM_STEERS; j++) {
                        INIT_LIST_HEAD(&priv->steer[i].promisc_qps[j]);
                        INIT_LIST_HEAD(&priv->steer[i].steer_entries[j]);
                }
        return 0;
}

static void mlx4_clear_steering(struct mlx4_dev *dev)
{
        struct mlx4_priv *priv = mlx4_priv(dev);
        struct mlx4_steer_index *entry, *tmp_entry;
        struct mlx4_promisc_qp *pqp, *tmp_pqp;
        int num_entries = dev->caps.num_ports;
        int i, j;

        for (i = 0; i < num_entries; i++) {
                for (j = 0; j < MLX4_NUM_STEERS; j++) {
                        list_for_each_entry_safe(pqp, tmp_pqp,
                                                 &priv->steer[i].promisc_qps[j],
                                                 list) {
                                list_del(&pqp->list);
                                kfree(pqp);
                        }
                        list_for_each_entry_safe(entry, tmp_entry,
                                                 &priv->steer[i].steer_entries[j],
                                                 list) {
                                list_del(&entry->list);
                                list_for_each_entry_safe(pqp, tmp_pqp,
                                                         &entry->duplicates,
                                                         list) {
                                        list_del(&pqp->list);
                                        kfree(pqp);
                                }
                                kfree(entry);
                        }
                }
        }
        kfree(priv->steer);
}

static int extended_func_num(struct pci_dev *pdev)
{
        return PCI_SLOT(pdev->devfn) * 8 + PCI_FUNC(pdev->devfn);
}

#define MLX4_OWNER_BASE 0x8069c
#define MLX4_OWNER_SIZE 4

static int mlx4_get_ownership(struct mlx4_dev *dev)
{
        void __iomem *owner;
        u32 ret;

        if (pci_channel_offline(dev->pdev))
                return -EIO;

        owner = ioremap(pci_resource_start(dev->pdev, 0) + MLX4_OWNER_BASE,
                        MLX4_OWNER_SIZE);
        if (!owner) {
                mlx4_err(dev, "Failed to obtain ownership bit\n");
                return -ENOMEM;
        }

        ret = readl(owner);
        iounmap(owner);
        return (int) !!ret;
}

static void mlx4_free_ownership(struct mlx4_dev *dev)
{
        void __iomem *owner;

        if (pci_channel_offline(dev->pdev))
                return;

        owner = ioremap(pci_resource_start(dev->pdev, 0) + MLX4_OWNER_BASE,
                        MLX4_OWNER_SIZE);
        if (!owner) {
                mlx4_err(dev, "Failed to obtain ownership bit\n");
                return;
        }
        writel(0, owner);
        msleep(1000);
        iounmap(owner);
}

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

        pr_info(DRV_NAME ": 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;
        }
        if (num_vfs > MLX4_MAX_NUM_VF) {
                printk(KERN_ERR "There are more VF's (%d) than allowed(%d)\n",
                       num_vfs, MLX4_MAX_NUM_VF);
                return -EINVAL;
        }
        /*
         * Check for BARs.
         */
        if (!(pci_dev_data & MLX4_PCI_DEV_IS_VF) &&
            !(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
                dev_err(&pdev->dev, "Missing DCS, aborting."
                        "(driver_data: 0x%x, pci_resource_flags(pdev, 0):0x%lx)\n",
                        pci_dev_data, pci_resource_flags(pdev, 0));
                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;
                }
        }

        /* Allow large DMA segments, up to the firmware limit of 1 GB */
        dma_set_max_seg_size(&pdev->dev, 1024 * 1024 * 1024);

        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);

        INIT_LIST_HEAD(&priv->bf_list);
        mutex_init(&priv->bf_mutex);

        dev->rev_id = pdev->revision;
        /* Detect if this device is a virtual function */
        if (pci_dev_data & MLX4_PCI_DEV_IS_VF) {
                /* When acting as pf, we normally skip vfs unless explicitly
                 * requested to probe them. */
                if (num_vfs && extended_func_num(pdev) > probe_vf) {
                        mlx4_warn(dev, "Skipping virtual function:%d\n",
                                                extended_func_num(pdev));
                        err = -ENODEV;
                        goto err_free_dev;
                }
                mlx4_warn(dev, "Detected virtual function - running in slave mode\n");
                dev->flags |= MLX4_FLAG_SLAVE;
        } else {
                /* We reset the device and enable SRIOV only for physical
                 * devices.  Try to claim ownership on the device;
                 * if already taken, skip -- do not allow multiple PFs */
                err = mlx4_get_ownership(dev);
                if (err) {
                        if (err < 0)
                                goto err_free_dev;
                        else {
                                mlx4_warn(dev, "Multiple PFs not yet supported."
                                          " Skipping PF.\n");
                                err = -EINVAL;
                                goto err_free_dev;
                        }
                }

                if (num_vfs) {
                        mlx4_warn(dev, "Enabling SR-IOV with %d VFs\n", num_vfs);
                        err = pci_enable_sriov(pdev, num_vfs);
                        if (err) {
                                mlx4_err(dev, "Failed to enable SR-IOV, continuing without SR-IOV (err = %d).\n",
                                         err);
                                err = 0;
                        } else {
                                mlx4_warn(dev, "Running in master mode\n");
                                dev->flags |= MLX4_FLAG_SRIOV |
                                              MLX4_FLAG_MASTER;
                                dev->num_vfs = num_vfs;
                        }
                }

                /*
                 * 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_rel_own;
                }
        }

slave_start:
        err = mlx4_cmd_init(dev);
        if (err) {
                mlx4_err(dev, "Failed to init command interface, aborting.\n");
                goto err_sriov;
        }

        /* In slave functions, the communication channel must be initialized
         * before posting commands. Also, init num_slaves before calling
         * mlx4_init_hca */
        if (mlx4_is_mfunc(dev)) {
                if (mlx4_is_master(dev))
                        dev->num_slaves = MLX4_MAX_NUM_SLAVES;
                else {
                        dev->num_slaves = 0;
                        if (mlx4_multi_func_init(dev)) {
                                mlx4_err(dev, "Failed to init slave mfunc"
                                         " interface, aborting.\n");
                                goto err_cmd;
                        }
                }
        }

        err = mlx4_init_hca(dev);
        if (err) {
                if (err == -EACCES) {
                        /* Not primary Physical function
                         * Running in slave mode */
                        mlx4_cmd_cleanup(dev);
                        dev->flags |= MLX4_FLAG_SLAVE;
                        dev->flags &= ~MLX4_FLAG_MASTER;
                        goto slave_start;
                } else
                        goto err_mfunc;
        }

        /* In master functions, the communication channel must be initialized
         * after obtaining its address from fw */
        if (mlx4_is_master(dev)) {
                if (mlx4_multi_func_init(dev)) {
                        mlx4_err(dev, "Failed to init master mfunc"
                                 "interface, aborting.\n");
                        goto err_close;
                }
        }

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

        priv->msix_ctl.pool_bm = 0;
        mutex_init(&priv->msix_ctl.pool_lock);

        mlx4_enable_msi_x(dev);
        if ((mlx4_is_mfunc(dev)) &&
            !(dev->flags & MLX4_FLAG_MSI_X)) {
                mlx4_err(dev, "INTx is not supported in multi-function mode."
                         " aborting.\n");
                goto err_free_eq;
        }

        if (!mlx4_is_slave(dev)) {
                err = mlx4_init_steering(dev);
                if (err)
                        goto err_free_eq;
        }

        err = mlx4_setup_hca(dev);
        if (err == -EBUSY && (dev->flags & MLX4_FLAG_MSI_X) &&
            !mlx4_is_mfunc(dev)) {
                dev->flags &= ~MLX4_FLAG_MSI_X;
                dev->caps.num_comp_vectors = 1;
                dev->caps.comp_pool        = 0;
                pci_disable_msix(pdev);
                err = mlx4_setup_hca(dev);
        }

        if (err)
                goto err_steer;

        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);

        priv->pci_dev_data = pci_dev_data;
        pci_set_drvdata(pdev, dev);

        return 0;

err_port:
        for (--port; port >= 1; --port)
                mlx4_cleanup_port_info(&priv->port[port]);

        mlx4_cleanup_counters_table(dev);
        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_xrcd_table(dev);
        mlx4_cleanup_pd_table(dev);
        mlx4_cleanup_uar_table(dev);

err_steer:
        if (!mlx4_is_slave(dev))
                mlx4_clear_steering(dev);

err_free_eq:
        mlx4_free_eq_table(dev);

err_master_mfunc:
        if (mlx4_is_master(dev))
                mlx4_multi_func_cleanup(dev);

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

        mlx4_close_hca(dev);

err_mfunc:
        if (mlx4_is_slave(dev))
                mlx4_multi_func_cleanup(dev);

err_cmd:
        mlx4_cmd_cleanup(dev);

err_sriov:
        if (dev->flags & MLX4_FLAG_SRIOV)
                pci_disable_sriov(pdev);

err_rel_own:
        if (!mlx4_is_slave(dev))
                mlx4_free_ownership(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)
{
        printk_once(KERN_INFO "%s", mlx4_version);

        return __mlx4_init_one(pdev, id->driver_data);
}

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) {
                /* in SRIOV it is not allowed to unload the pf's
                 * driver while there are alive vf's */
                if (mlx4_is_master(dev)) {
                        if (mlx4_how_many_lives_vf(dev))
                                printk(KERN_ERR "Removing PF when there are assigned VF's !!!\n");
                }
                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);
                }

                if (mlx4_is_master(dev))
                        mlx4_free_resource_tracker(dev,
                                                   RES_TR_FREE_SLAVES_ONLY);

                mlx4_cleanup_counters_table(dev);
                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_xrcd_table(dev);
                mlx4_cleanup_pd_table(dev);

                if (mlx4_is_master(dev))
                        mlx4_free_resource_tracker(dev,
                                                   RES_TR_FREE_STRUCTS_ONLY);

                iounmap(priv->kar);
                mlx4_uar_free(dev, &priv->driver_uar);
                mlx4_cleanup_uar_table(dev);
                if (!mlx4_is_slave(dev))
                        mlx4_clear_steering(dev);
                mlx4_free_eq_table(dev);
                if (mlx4_is_master(dev))
                        mlx4_multi_func_cleanup(dev);
                mlx4_close_hca(dev);
                if (mlx4_is_slave(dev))
                        mlx4_multi_func_cleanup(dev);
                mlx4_cmd_cleanup(dev);

                if (dev->flags & MLX4_FLAG_MSI_X)
                        pci_disable_msix(pdev);
                if (dev->flags & MLX4_FLAG_SRIOV) {
                        mlx4_warn(dev, "Disabling SR-IOV\n");
                        pci_disable_sriov(pdev);
                }

                if (!mlx4_is_slave(dev))
                        mlx4_free_ownership(dev);

                kfree(dev->caps.qp0_tunnel);
                kfree(dev->caps.qp0_proxy);
                kfree(dev->caps.qp1_tunnel);
                kfree(dev->caps.qp1_proxy);

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

int mlx4_restart_one(struct pci_dev *pdev)
{
        struct mlx4_dev  *dev  = pci_get_drvdata(pdev);
        struct mlx4_priv *priv = mlx4_priv(dev);
        int               pci_dev_data;

        pci_dev_data = priv->pci_dev_data;
        mlx4_remove_one(pdev);
        return __mlx4_init_one(pdev, pci_dev_data);
}

static DEFINE_PCI_DEVICE_TABLE(mlx4_pci_table) = {
        /* MT25408 "Hermon" SDR */
        { PCI_VDEVICE(MELLANOX, 0x6340), MLX4_PCI_DEV_FORCE_SENSE_PORT },
        /* MT25408 "Hermon" DDR */
        { PCI_VDEVICE(MELLANOX, 0x634a), MLX4_PCI_DEV_FORCE_SENSE_PORT },
        /* MT25408 "Hermon" QDR */
        { PCI_VDEVICE(MELLANOX, 0x6354), MLX4_PCI_DEV_FORCE_SENSE_PORT },
        /* MT25408 "Hermon" DDR PCIe gen2 */
        { PCI_VDEVICE(MELLANOX, 0x6732), MLX4_PCI_DEV_FORCE_SENSE_PORT },
        /* MT25408 "Hermon" QDR PCIe gen2 */
        { PCI_VDEVICE(MELLANOX, 0x673c), MLX4_PCI_DEV_FORCE_SENSE_PORT },
        /* MT25408 "Hermon" EN 10GigE */
        { PCI_VDEVICE(MELLANOX, 0x6368), MLX4_PCI_DEV_FORCE_SENSE_PORT },
        /* MT25408 "Hermon" EN 10GigE PCIe gen2 */
        { PCI_VDEVICE(MELLANOX, 0x6750), MLX4_PCI_DEV_FORCE_SENSE_PORT },
        /* MT25458 ConnectX EN 10GBASE-T 10GigE */
        { PCI_VDEVICE(MELLANOX, 0x6372), MLX4_PCI_DEV_FORCE_SENSE_PORT },
        /* MT25458 ConnectX EN 10GBASE-T+Gen2 10GigE */
        { PCI_VDEVICE(MELLANOX, 0x675a), MLX4_PCI_DEV_FORCE_SENSE_PORT },
        /* MT26468 ConnectX EN 10GigE PCIe gen2*/
        { PCI_VDEVICE(MELLANOX, 0x6764), MLX4_PCI_DEV_FORCE_SENSE_PORT },
        /* MT26438 ConnectX EN 40GigE PCIe gen2 5GT/s */
        { PCI_VDEVICE(MELLANOX, 0x6746), MLX4_PCI_DEV_FORCE_SENSE_PORT },
        /* MT26478 ConnectX2 40GigE PCIe gen2 */
        { PCI_VDEVICE(MELLANOX, 0x676e), MLX4_PCI_DEV_FORCE_SENSE_PORT },
        /* MT25400 Family [ConnectX-2 Virtual Function] */
        { PCI_VDEVICE(MELLANOX, 0x1002), MLX4_PCI_DEV_IS_VF },
        /* MT27500 Family [ConnectX-3] */
        { PCI_VDEVICE(MELLANOX, 0x1003), 0 },
        /* MT27500 Family [ConnectX-3 Virtual Function] */
        { PCI_VDEVICE(MELLANOX, 0x1004), MLX4_PCI_DEV_IS_VF },
        { PCI_VDEVICE(MELLANOX, 0x1005), 0 }, /* MT27510 Family */
        { PCI_VDEVICE(MELLANOX, 0x1006), 0 }, /* MT27511 Family */
        { PCI_VDEVICE(MELLANOX, 0x1007), 0 }, /* MT27520 Family */
        { PCI_VDEVICE(MELLANOX, 0x1008), 0 }, /* MT27521 Family */
        { PCI_VDEVICE(MELLANOX, 0x1009), 0 }, /* MT27530 Family */
        { PCI_VDEVICE(MELLANOX, 0x100a), 0 }, /* MT27531 Family */
        { PCI_VDEVICE(MELLANOX, 0x100b), 0 }, /* MT27540 Family */
        { PCI_VDEVICE(MELLANOX, 0x100c), 0 }, /* MT27541 Family */
        { PCI_VDEVICE(MELLANOX, 0x100d), 0 }, /* MT27550 Family */
        { PCI_VDEVICE(MELLANOX, 0x100e), 0 }, /* MT27551 Family */
        { PCI_VDEVICE(MELLANOX, 0x100f), 0 }, /* MT27560 Family */
        { PCI_VDEVICE(MELLANOX, 0x1010), 0 }, /* MT27561 Family */
        { 0, }
};

MODULE_DEVICE_TABLE(pci, mlx4_pci_table);

static pci_ers_result_t mlx4_pci_err_detected(struct pci_dev *pdev,
                                              pci_channel_state_t state)
{
        mlx4_remove_one(pdev);

        return state == pci_channel_io_perm_failure ?
                PCI_ERS_RESULT_DISCONNECT : PCI_ERS_RESULT_NEED_RESET;
}

static pci_ers_result_t mlx4_pci_slot_reset(struct pci_dev *pdev)
{
        int ret = __mlx4_init_one(pdev, 0);

        return ret ? PCI_ERS_RESULT_DISCONNECT : PCI_ERS_RESULT_RECOVERED;
}

static const struct pci_error_handlers mlx4_err_handler = {
        .error_detected = mlx4_pci_err_detected,
        .slot_reset     = mlx4_pci_slot_reset,
};

static struct pci_driver mlx4_driver = {
        .name           = DRV_NAME,
        .id_table       = mlx4_pci_table,
        .probe          = mlx4_init_one,
        .remove         = __devexit_p(mlx4_remove_one),
        .err_handler    = &mlx4_err_handler,
};

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

        if (log_num_vlan != 0)
                pr_warning("mlx4_core: log_num_vlan - obsolete module param, using %d\n",
                           MLX4_LOG_NUM_VLANS);

        if ((log_mtts_per_seg < 1) || (log_mtts_per_seg > 7)) {
                pr_warning("mlx4_core: bad log_mtts_per_seg: %d\n", log_mtts_per_seg);
                return -1;
        }

        /* Check if module param for ports type has legal combination */
        if (port_type_array[0] == false && port_type_array[1] == true) {
                printk(KERN_WARNING "Module parameter configuration ETH/IB is not supported. Switching to default configuration IB/IB\n");
                port_type_array[0] = true;
        }

        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);