/*
 * 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/kernel.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/kmod.h>
#include <linux/etherdevice.h>
#include <net/devlink.h>

#include <uapi/rdma/mlx4-abi.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, "0 - don't use MSI-X, 1 - use MSI-X, >1 - limit number of MSI-X irqs to msi_x");

#else /* CONFIG_PCI_MSI */

#define msi_x (0)

#endif /* CONFIG_PCI_MSI */

static uint8_t num_vfs[3] = {0, 0, 0};
static int num_vfs_argc;
module_param_array(num_vfs, byte , &num_vfs_argc, 0444);
MODULE_PARM_DESC(num_vfs, "enable #num_vfs functions if num_vfs > 0\n"
                          "num_vfs=port1,port2,port1+2");

static uint8_t probe_vf[3] = {0, 0, 0};
static int probe_vfs_argc;
module_param_array(probe_vf, byte, &probe_vfs_argc, 0444);
MODULE_PARM_DESC(probe_vf, "number of vfs to probe by pf driver (num_vfs > 0)\n"
                           "probe_vf=port1,port2,port1+2");

static int mlx4_log_num_mgm_entry_size = MLX4_DEFAULT_MGM_LOG_ENTRY_SIZE;
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: 7 <="
                                         " log_num_mgm_entry_size <= 12."
                                         " To activate device managed"
                                         " flow steering when available, set to -1");

static bool enable_64b_cqe_eqe = true;
module_param(enable_64b_cqe_eqe, bool, 0444);
MODULE_PARM_DESC(enable_64b_cqe_eqe,
                 "Enable 64 byte CQEs/EQEs when the FW supports this (default: True)");

static bool enable_4k_uar;
module_param(enable_4k_uar, bool, 0444);
MODULE_PARM_DESC(enable_4k_uar,
                 "Enable using 4K UAR. Should not be enabled if have VFs which do not support 4K UARs (default: false)");

#define PF_CONTEXT_BEHAVIOUR_MASK       (MLX4_FUNC_CAP_64B_EQE_CQE | \
                                         MLX4_FUNC_CAP_EQE_CQE_STRIDE | \
                                         MLX4_FUNC_CAP_DMFS_A0_STATIC)

#define RESET_PERSIST_MASK_FLAGS        (MLX4_FLAG_SRIOV)

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

static const 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 const struct mlx4_profile low_mem_profile = {
        .num_qp         = 1 << 17,
        .num_srq        = 1 << 6,
        .rdmarc_per_qp  = 1 << 4,
        .num_cq         = 1 << 8,
        .num_mcg        = 1 << 8,
        .num_mpt        = 1 << 9,
        .num_mtt        = 1 << 7,
};

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
#define MLX4_MIN_LOG_NUM_VLANS 0
#define MLX4_MIN_LOG_NUM_MAC 1

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 (deprecated)");

int log_mtts_per_seg = ilog2(1);
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 "
                 "(0-7) (default: 0)");

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;
};

static atomic_t pf_loading = ATOMIC_INIT(0);

static int mlx4_devlink_ierr_reset_get(struct devlink *devlink, u32 id,
                                       struct devlink_param_gset_ctx *ctx)
{
        ctx->val.vbool = !!mlx4_internal_err_reset;
        return 0;
}

static int mlx4_devlink_ierr_reset_set(struct devlink *devlink, u32 id,
                                       struct devlink_param_gset_ctx *ctx)
{
        mlx4_internal_err_reset = ctx->val.vbool;
        return 0;
}

static int mlx4_devlink_crdump_snapshot_get(struct devlink *devlink, u32 id,
                                            struct devlink_param_gset_ctx *ctx)
{
        struct mlx4_priv *priv = devlink_priv(devlink);
        struct mlx4_dev *dev = &priv->dev;

        ctx->val.vbool = dev->persist->crdump.snapshot_enable;
        return 0;
}

static int mlx4_devlink_crdump_snapshot_set(struct devlink *devlink, u32 id,
                                            struct devlink_param_gset_ctx *ctx)
{
        struct mlx4_priv *priv = devlink_priv(devlink);
        struct mlx4_dev *dev = &priv->dev;

        dev->persist->crdump.snapshot_enable = ctx->val.vbool;
        return 0;
}

static int
mlx4_devlink_max_macs_validate(struct devlink *devlink, u32 id,
                               union devlink_param_value val,
                               struct netlink_ext_ack *extack)
{
        u32 value = val.vu32;

        if (value < 1 || value > 128)
                return -ERANGE;

        if (!is_power_of_2(value)) {
                NL_SET_ERR_MSG_MOD(extack, "max_macs supported must be power of 2");
                return -EINVAL;
        }

        return 0;
}

enum mlx4_devlink_param_id {
        MLX4_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX,
        MLX4_DEVLINK_PARAM_ID_ENABLE_64B_CQE_EQE,
        MLX4_DEVLINK_PARAM_ID_ENABLE_4K_UAR,
};

static const struct devlink_param mlx4_devlink_params[] = {
        DEVLINK_PARAM_GENERIC(INT_ERR_RESET,
                              BIT(DEVLINK_PARAM_CMODE_RUNTIME) |
                              BIT(DEVLINK_PARAM_CMODE_DRIVERINIT),
                              mlx4_devlink_ierr_reset_get,
                              mlx4_devlink_ierr_reset_set, NULL),
        DEVLINK_PARAM_GENERIC(MAX_MACS,
                              BIT(DEVLINK_PARAM_CMODE_DRIVERINIT),
                              NULL, NULL, mlx4_devlink_max_macs_validate),
        DEVLINK_PARAM_GENERIC(REGION_SNAPSHOT,
                              BIT(DEVLINK_PARAM_CMODE_RUNTIME) |
                              BIT(DEVLINK_PARAM_CMODE_DRIVERINIT),
                              mlx4_devlink_crdump_snapshot_get,
                              mlx4_devlink_crdump_snapshot_set, NULL),
        DEVLINK_PARAM_DRIVER(MLX4_DEVLINK_PARAM_ID_ENABLE_64B_CQE_EQE,
                             "enable_64b_cqe_eqe", DEVLINK_PARAM_TYPE_BOOL,
                             BIT(DEVLINK_PARAM_CMODE_DRIVERINIT),
                             NULL, NULL, NULL),
        DEVLINK_PARAM_DRIVER(MLX4_DEVLINK_PARAM_ID_ENABLE_4K_UAR,
                             "enable_4k_uar", DEVLINK_PARAM_TYPE_BOOL,
                             BIT(DEVLINK_PARAM_CMODE_DRIVERINIT),
                             NULL, NULL, NULL),
};

static void mlx4_devlink_set_params_init_values(struct devlink *devlink)
{
        union devlink_param_value value;

        value.vbool = !!mlx4_internal_err_reset;
        devlink_param_driverinit_value_set(devlink,
                                           DEVLINK_PARAM_GENERIC_ID_INT_ERR_RESET,
                                           value);

        value.vu32 = 1UL << log_num_mac;
        devlink_param_driverinit_value_set(devlink,
                                           DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
                                           value);

        value.vbool = enable_64b_cqe_eqe;
        devlink_param_driverinit_value_set(devlink,
                                           MLX4_DEVLINK_PARAM_ID_ENABLE_64B_CQE_EQE,
                                           value);

        value.vbool = enable_4k_uar;
        devlink_param_driverinit_value_set(devlink,
                                           MLX4_DEVLINK_PARAM_ID_ENABLE_4K_UAR,
                                           value);

        value.vbool = false;
        devlink_param_driverinit_value_set(devlink,
                                           DEVLINK_PARAM_GENERIC_ID_REGION_SNAPSHOT,
                                           value);
}

static inline void mlx4_set_num_reserved_uars(struct mlx4_dev *dev,
                                              struct mlx4_dev_cap *dev_cap)
{
        /* The reserved_uars is calculated by system page size unit.
         * Therefore, adjustment is added when the uar page size is less
         * than the system page size
         */
        dev->caps.reserved_uars =
                max_t(int,
                      mlx4_get_num_reserved_uar(dev),
                      dev_cap->reserved_uars /
                        (1 << (PAGE_SHIFT - dev->uar_page_shift)));
}

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

        if (!(dev->caps.flags & MLX4_DEV_CAP_FLAG_DPDP)) {
                for (i = 0; i < dev->caps.num_ports - 1; i++) {
                        if (port_type[i] != port_type[i + 1]) {
                                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];
}

enum {
        MLX4_QUERY_FUNC_NUM_SYS_EQS = 1 << 0,
};

static int mlx4_query_func(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap)
{
        int err = 0;
        struct mlx4_func func;

        if (dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_SYS_EQS) {
                err = mlx4_QUERY_FUNC(dev, &func, 0);
                if (err) {
                        mlx4_err(dev, "QUERY_DEV_CAP command failed, aborting.\n");
                        return err;
                }
                dev_cap->max_eqs = func.max_eq;
                dev_cap->reserved_eqs = func.rsvd_eqs;
                dev_cap->reserved_uars = func.rsvd_uars;
                err |= MLX4_QUERY_FUNC_NUM_SYS_EQS;
        }
        return err;
}

static void mlx4_enable_cqe_eqe_stride(struct mlx4_dev *dev)
{
        struct mlx4_caps *dev_cap = &dev->caps;

        /* FW not supporting or cancelled by user */
        if (!(dev_cap->flags2 & MLX4_DEV_CAP_FLAG2_EQE_STRIDE) ||
            !(dev_cap->flags2 & MLX4_DEV_CAP_FLAG2_CQE_STRIDE))
                return;

        /* Must have 64B CQE_EQE enabled by FW to use bigger stride
         * When FW has NCSI it may decide not to report 64B CQE/EQEs
         */
        if (!(dev_cap->flags & MLX4_DEV_CAP_FLAG_64B_EQE) ||
            !(dev_cap->flags & MLX4_DEV_CAP_FLAG_64B_CQE)) {
                dev_cap->flags2 &= ~MLX4_DEV_CAP_FLAG2_CQE_STRIDE;
                dev_cap->flags2 &= ~MLX4_DEV_CAP_FLAG2_EQE_STRIDE;
                return;
        }

        if (cache_line_size() == 128 || cache_line_size() == 256) {
                mlx4_dbg(dev, "Enabling CQE stride cacheLine supported\n");
                /* Changing the real data inside CQE size to 32B */
                dev_cap->flags &= ~MLX4_DEV_CAP_FLAG_64B_CQE;
                dev_cap->flags &= ~MLX4_DEV_CAP_FLAG_64B_EQE;

                if (mlx4_is_master(dev))
                        dev_cap->function_caps |= MLX4_FUNC_CAP_EQE_CQE_STRIDE;
        } else {
                if (cache_line_size() != 32  && cache_line_size() != 64)
                        mlx4_dbg(dev, "Disabling CQE stride, cacheLine size unsupported\n");
                dev_cap->flags2 &= ~MLX4_DEV_CAP_FLAG2_CQE_STRIDE;
                dev_cap->flags2 &= ~MLX4_DEV_CAP_FLAG2_EQE_STRIDE;
        }
}

static int _mlx4_dev_port(struct mlx4_dev *dev, int port,
                          struct mlx4_port_cap *port_cap)
{
        dev->caps.vl_cap[port]      = port_cap->max_vl;
        dev->caps.ib_mtu_cap[port]          = port_cap->ib_mtu;
        dev->phys_caps.gid_phys_table_len[port]  = port_cap->max_gids;
        dev->phys_caps.pkey_phys_table_len[port] = port_cap->max_pkeys;
        /* set gid and pkey table operating lengths by default
         * to non-sriov values
         */
        dev->caps.gid_table_len[port]  = port_cap->max_gids;
        dev->caps.pkey_table_len[port] = port_cap->max_pkeys;
        dev->caps.port_width_cap[port] = port_cap->max_port_width;
        dev->caps.eth_mtu_cap[port]    = port_cap->eth_mtu;
        dev->caps.max_tc_eth           = port_cap->max_tc_eth;
        dev->caps.def_mac[port]        = port_cap->def_mac;
        dev->caps.supported_type[port] = port_cap->supported_port_types;
        dev->caps.suggested_type[port] = port_cap->suggested_type;
        dev->caps.default_sense[port] = port_cap->default_sense;
        dev->caps.trans_type[port]          = port_cap->trans_type;
        dev->caps.vendor_oui[port]     = port_cap->vendor_oui;
        dev->caps.wavelength[port]     = port_cap->wavelength;
        dev->caps.trans_code[port]     = port_cap->trans_code;

        return 0;
}

static int mlx4_dev_port(struct mlx4_dev *dev, int port,
                         struct mlx4_port_cap *port_cap)
{
        int err = 0;

        err = mlx4_QUERY_PORT(dev, port, port_cap);

        if (err)
                mlx4_err(dev, "QUERY_PORT command failed.\n");

        return err;
}

static inline void mlx4_enable_ignore_fcs(struct mlx4_dev *dev)
{
        if (!(dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_IGNORE_FCS))
                return;

        if (mlx4_is_mfunc(dev)) {
                mlx4_dbg(dev, "SRIOV mode - Disabling Ignore FCS");
                dev->caps.flags2 &= ~MLX4_DEV_CAP_FLAG2_IGNORE_FCS;
                return;
        }

        if (!(dev->caps.flags & MLX4_DEV_CAP_FLAG_FCS_KEEP)) {
                mlx4_dbg(dev,
                         "Keep FCS is not supported - Disabling Ignore FCS");
                dev->caps.flags2 &= ~MLX4_DEV_CAP_FLAG2_IGNORE_FCS;
                return;
        }
}

#define MLX4_A0_STEERING_TABLE_SIZE     256
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;
        }
        mlx4_dev_cap_dump(dev, dev_cap);

        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->persist->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->persist->pdev, 2));
                return -ENODEV;
        }

        dev->caps.num_ports          = dev_cap->num_ports;
        dev->caps.num_sys_eqs = dev_cap->num_sys_eqs;
        dev->phys_caps.num_phys_eqs = dev_cap->flags2 & MLX4_DEV_CAP_FLAG2_SYS_EQS ?
                                      dev->caps.num_sys_eqs :
                                      MLX4_MAX_EQ_NUM;
        for (i = 1; i <= dev->caps.num_ports; ++i) {
                err = _mlx4_dev_port(dev, i, dev_cap->port_cap + i);
                if (err) {
                        mlx4_err(dev, "QUERY_PORT command failed, aborting\n");
                        return err;
                }
        }

        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;

        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;
        dev->caps.wol_port[1]          = dev_cap->wol_port[1];
        dev->caps.wol_port[2]          = dev_cap->wol_port[2];
        dev->caps.health_buffer_addrs  = dev_cap->health_buffer_addrs;

        /* Save uar page shift */
        if (!mlx4_is_slave(dev)) {
                /* Virtual PCI function needs to determine UAR page size from
                 * firmware. Only master PCI function can set the uar page size
                 */
                if (enable_4k_uar || !dev->persist->num_vfs)
                        dev->uar_page_shift = DEFAULT_UAR_PAGE_SHIFT;
                else
                        dev->uar_page_shift = PAGE_SHIFT;

                mlx4_set_num_reserved_uars(dev, dev_cap);
        }

        if (dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_PHV_EN) {
                struct mlx4_init_hca_param hca_param;

                memset(&hca_param, 0, sizeof(hca_param));
                err = mlx4_QUERY_HCA(dev, &hca_param);
                /* Turn off PHV_EN flag in case phv_check_en is set.
                 * phv_check_en is a HW check that parse the packet and verify
                 * phv bit was reported correctly in the wqe. To allow QinQ
                 * PHV_EN flag should be set and phv_check_en must be cleared
                 * otherwise QinQ packets will be drop by the HW.
                 */
                if (err || hca_param.phv_check_en)
                        dev->caps.flags2 &= ~MLX4_DEV_CAP_FLAG2_PHV_EN;
        }

        /* 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;

        if (mlx4_low_memory_profile()) {
                dev->caps.log_num_macs  = MLX4_MIN_LOG_NUM_MAC;
                dev->caps.log_num_vlans = MLX4_MIN_LOG_NUM_VLANS;
        } else {
                dev->caps.log_num_macs  = log_num_mac;
                dev->caps.log_num_vlans = MLX4_LOG_NUM_VLANS;
        }

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

        if (mlx4_is_master(dev) && (dev->caps.num_ports == 2) &&
            (port_type_array[0] == MLX4_PORT_TYPE_IB) &&
            (port_type_array[1] == MLX4_PORT_TYPE_ETH)) {
                mlx4_warn(dev,
                          "Granular QoS per VF not supported with IB/Eth configuration\n");
                dev->caps.flags2 &= ~MLX4_DEV_CAP_FLAG2_QOS_VPP;
        }

        dev->caps.max_counters = 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) *
                dev->caps.num_ports;
        dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FC_EXCH] = MLX4_NUM_FEXCH;

        if (dev_cap->dmfs_high_rate_qpn_base > 0 &&
            dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_FS_EN)
                dev->caps.dmfs_high_rate_qpn_base = dev_cap->dmfs_high_rate_qpn_base;
        else
                dev->caps.dmfs_high_rate_qpn_base =
                        dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FW];

        if (dev_cap->dmfs_high_rate_qpn_range > 0 &&
            dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_FS_EN) {
                dev->caps.dmfs_high_rate_qpn_range = dev_cap->dmfs_high_rate_qpn_range;
                dev->caps.dmfs_high_steer_mode = MLX4_STEERING_DMFS_A0_DEFAULT;
                dev->caps.flags2 |= MLX4_DEV_CAP_FLAG2_FS_A0;
        } else {
                dev->caps.dmfs_high_steer_mode = MLX4_STEERING_DMFS_A0_NOT_SUPPORTED;
                dev->caps.dmfs_high_rate_qpn_base =
                        dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FW];
                dev->caps.dmfs_high_rate_qpn_range = MLX4_A0_STEERING_TABLE_SIZE;
        }

        dev->caps.rl_caps = dev_cap->rl_caps;

        dev->caps.reserved_qps_cnt[MLX4_QP_REGION_RSS_RAW_ETH] =
                dev->caps.dmfs_high_rate_qpn_range;

        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;

        if (!enable_64b_cqe_eqe && !mlx4_is_slave(dev)) {
                if (dev_cap->flags &
                    (MLX4_DEV_CAP_FLAG_64B_CQE | MLX4_DEV_CAP_FLAG_64B_EQE)) {
                        mlx4_warn(dev, "64B EQEs/CQEs supported by the device but not enabled\n");
                        dev->caps.flags &= ~MLX4_DEV_CAP_FLAG_64B_CQE;
                        dev->caps.flags &= ~MLX4_DEV_CAP_FLAG_64B_EQE;
                }

                if (dev_cap->flags2 &
                    (MLX4_DEV_CAP_FLAG2_CQE_STRIDE |
                     MLX4_DEV_CAP_FLAG2_EQE_STRIDE)) {
                        mlx4_warn(dev, "Disabling EQE/CQE stride per user request\n");
                        dev_cap->flags2 &= ~MLX4_DEV_CAP_FLAG2_CQE_STRIDE;
                        dev_cap->flags2 &= ~MLX4_DEV_CAP_FLAG2_EQE_STRIDE;
                }
        }

        if ((dev->caps.flags &
            (MLX4_DEV_CAP_FLAG_64B_CQE | MLX4_DEV_CAP_FLAG_64B_EQE)) &&
            mlx4_is_master(dev))
                dev->caps.function_caps |= MLX4_FUNC_CAP_64B_EQE_CQE;

        if (!mlx4_is_slave(dev)) {
                mlx4_enable_cqe_eqe_stride(dev);
                dev->caps.alloc_res_qp_mask =
                        (dev->caps.bf_reg_size ? MLX4_RESERVE_ETH_BF_QP : 0) |
                        MLX4_RESERVE_A0_QP;

                if (!(dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_ETS_CFG) &&
                    dev->caps.flags & MLX4_DEV_CAP_FLAG_SET_ETH_SCHED) {
                        mlx4_warn(dev, "Old device ETS support detected\n");
                        mlx4_warn(dev, "Consider upgrading device FW.\n");
                        dev->caps.flags2 |= MLX4_DEV_CAP_FLAG2_ETS_CFG;
                }

        } else {
                dev->caps.alloc_res_qp_mask = 0;
        }

        mlx4_enable_ignore_fcs(dev);

        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);

void mlx4_handle_eth_header_mcast_prio(struct mlx4_net_trans_rule_hw_ctrl *ctrl,
                                       struct _rule_hw *eth_header)
{
        if (is_multicast_ether_addr(eth_header->eth.dst_mac) ||
            is_broadcast_ether_addr(eth_header->eth.dst_mac)) {
                struct mlx4_net_trans_rule_hw_eth *eth =
                        (struct mlx4_net_trans_rule_hw_eth *)eth_header;
                struct _rule_hw *next_rule = (struct _rule_hw *)(eth + 1);
                bool last_rule = next_rule->size == 0 && next_rule->id == 0 &&
                        next_rule->rsvd == 0;

                if (last_rule)
                        ctrl->prio = cpu_to_be16(MLX4_DOMAIN_NIC);
        }
}
EXPORT_SYMBOL(mlx4_handle_eth_header_mcast_prio);

static void slave_adjust_steering_mode(struct mlx4_dev *dev,
                                       struct mlx4_dev_cap *dev_cap,
                                       struct mlx4_init_hca_param *hca_param)
{
        dev->caps.steering_mode = hca_param->steering_mode;
        if (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
                dev->caps.num_qp_per_mgm =
                        4 * ((1 << hca_param->log_mc_entry_sz)/16 - 2);

        mlx4_dbg(dev, "Steering mode is: %s\n",
                 mlx4_steering_mode_str(dev->caps.steering_mode));
}

static void mlx4_slave_destroy_special_qp_cap(struct mlx4_dev *dev)
{
        kfree(dev->caps.spec_qps);
        dev->caps.spec_qps = NULL;
}

static int mlx4_slave_special_qp_cap(struct mlx4_dev *dev)
{
        struct mlx4_func_cap *func_cap = NULL;
        struct mlx4_caps *caps = &dev->caps;
        int i, err = 0;

        func_cap = kzalloc(sizeof(*func_cap), GFP_KERNEL);
        caps->spec_qps = kcalloc(caps->num_ports, sizeof(*caps->spec_qps), GFP_KERNEL);

        if (!func_cap || !caps->spec_qps) {
                mlx4_err(dev, "Failed to allocate memory for special qps cap\n");
                err = -ENOMEM;
                goto err_mem;
        }

        for (i = 1; i <= caps->num_ports; ++i) {
                err = mlx4_QUERY_FUNC_CAP(dev, 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;
                }
                caps->spec_qps[i - 1] = func_cap->spec_qps;
                caps->port_mask[i] = caps->port_type[i];
                caps->phys_port_id[i] = func_cap->phys_port_id;
                err = mlx4_get_slave_pkey_gid_tbl_len(dev, i,
                                                      &caps->gid_table_len[i],
                                                      &caps->pkey_table_len[i]);
                if (err) {
                        mlx4_err(dev, "QUERY_PORT command failed for port %d, aborting (%d)\n",
                                 i, err);
                        goto err_mem;
                }
        }

err_mem:
        if (err)
                mlx4_slave_destroy_special_qp_cap(dev);
        kfree(func_cap);
        return err;
}

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

        hca_param = kzalloc(sizeof(*hca_param), GFP_KERNEL);
        func_cap = kzalloc(sizeof(*func_cap), GFP_KERNEL);
        dev_cap = kzalloc(sizeof(*dev_cap), GFP_KERNEL);
        if (!hca_param || !func_cap || !dev_cap) {
                mlx4_err(dev, "Failed to allocate memory for slave_cap\n");
                err = -ENOMEM;
                goto free_mem;
        }

        err = mlx4_QUERY_HCA(dev, hca_param);
        if (err) {
                mlx4_err(dev, "QUERY_HCA command failed, aborting\n");
                goto free_mem;
        }

        /* fail if the hca has an unknown global capability
         * at this time global_caps should be always zeroed
         */
        if (hca_param->global_caps) {
                mlx4_err(dev, "Unknown hca global capabilities\n");
                err = -EINVAL;
                goto free_mem;
        }

        dev->caps.hca_core_clock = hca_param->hca_core_clock;

        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");
                goto free_mem;
        }

        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);
                err = -ENODEV;
                goto free_mem;
        }

        /* Set uar_page_shift for VF */
        dev->uar_page_shift = hca_param->uar_page_sz + 12;

        /* Make sure the master uar page size is valid */
        if (dev->uar_page_shift > PAGE_SHIFT) {
                mlx4_err(dev,
                         "Invalid configuration: uar page size is larger than system page size\n");
                err = -ENODEV;
                goto free_mem;
        }

        /* Set reserved_uars based on the uar_page_shift */
        mlx4_set_num_reserved_uars(dev, dev_cap);

        /* Although uar page size in FW differs from system page size,
         * upper software layers (mlx4_ib, mlx4_en and part of mlx4_core)
         * still works with assumption that uar page size == system page size
         */
        dev->caps.uar_page_size = PAGE_SIZE;

        err = mlx4_QUERY_FUNC_CAP(dev, 0, func_cap);
        if (err) {
                mlx4_err(dev, "QUERY_FUNC_CAP general command failed, aborting (%d)\n",
                         err);
                goto free_mem;
        }

        if ((func_cap->pf_context_behaviour | PF_CONTEXT_BEHAVIOUR_MASK) !=
            PF_CONTEXT_BEHAVIOUR_MASK) {
                mlx4_err(dev, "Unknown pf context behaviour %x known flags %x\n",
                         func_cap->pf_context_behaviour,
                         PF_CONTEXT_BEHAVIOUR_MASK);
                err = -EINVAL;
                goto free_mem;
        }

        dev->caps.num_ports             = func_cap->num_ports;
        dev->quotas.qp                  = func_cap->qp_quota;
        dev->quotas.srq                 = func_cap->srq_quota;
        dev->quotas.cq                  = func_cap->cq_quota;

        dev->quotas.mpt                 = func_cap->mpt_quota;
        dev->quotas.mtt                 = func_cap->mtt_quota;
        dev->caps.num_qps               = 1 << hca_param->log_num_qps;
        dev->caps.num_srqs              = 1 << hca_param->log_num_srqs;
        dev->caps.num_cqs               = 1 << hca_param->log_num_cqs;
        dev->caps.num_mpts              = 1 << hca_param->log_mpt_sz;
        dev->caps.num_eqs               = func_cap->max_eq;
        dev->caps.reserved_eqs          = func_cap->reserved_eq;
        dev->caps.reserved_lkey         = func_cap->reserved_lkey;
        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);
                err = -ENODEV;
                goto free_mem;
        }

        mlx4_replace_zero_macs(dev);

        err = mlx4_slave_special_qp_cap(dev);
        if (err) {
                mlx4_err(dev, "Set special QP caps failed. aborting\n");
                goto free_mem;
        }

        if (dev->caps.uar_page_size * (dev->caps.num_uars -
                                       dev->caps.reserved_uars) >
                                       pci_resource_len(dev->persist->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->persist->pdev, 2));
                err = -ENOMEM;
                goto err_mem;
        }

        if (hca_param->dev_cap_enabled & MLX4_DEV_CAP_64B_EQE_ENABLED) {
                dev->caps.eqe_size   = 64;
                dev->caps.eqe_factor = 1;
        } else {
                dev->caps.eqe_size   = 32;
                dev->caps.eqe_factor = 0;
        }

        if (hca_param->dev_cap_enabled & MLX4_DEV_CAP_64B_CQE_ENABLED) {
                dev->caps.cqe_size   = 64;
                dev->caps.userspace_caps |= MLX4_USER_DEV_CAP_LARGE_CQE;
        } else {
                dev->caps.cqe_size   = 32;
        }

        if (hca_param->dev_cap_enabled & MLX4_DEV_CAP_EQE_STRIDE_ENABLED) {
                dev->caps.eqe_size = hca_param->eqe_size;
                dev->caps.eqe_factor = 0;
        }

        if (hca_param->dev_cap_enabled & MLX4_DEV_CAP_CQE_STRIDE_ENABLED) {
                dev->caps.cqe_size = hca_param->cqe_size;
                /* User still need to know when CQE > 32B */
                dev->caps.userspace_caps |= MLX4_USER_DEV_CAP_LARGE_CQE;
        }

        dev->caps.flags2 &= ~MLX4_DEV_CAP_FLAG2_TS;
        mlx4_warn(dev, "Timestamping is not supported in slave mode\n");

        dev->caps.flags2 &= ~MLX4_DEV_CAP_FLAG2_USER_MAC_EN;
        mlx4_dbg(dev, "User MAC FW update is not supported in slave mode\n");

        slave_adjust_steering_mode(dev, dev_cap, hca_param);
        mlx4_dbg(dev, "RSS support for IP fragments is %s\n",
                 hca_param->rss_ip_frags ? "on" : "off");

        if (func_cap->extra_flags & MLX4_QUERY_FUNC_FLAGS_BF_RES_QP &&
            dev->caps.bf_reg_size)
                dev->caps.alloc_res_qp_mask |= MLX4_RESERVE_ETH_BF_QP;

        if (func_cap->extra_flags & MLX4_QUERY_FUNC_FLAGS_A0_RES_QP)
                dev->caps.alloc_res_qp_mask |= MLX4_RESERVE_A0_QP;

err_mem:
        if (err)
                mlx4_slave_destroy_special_qp_cap(dev);
free_mem:
        kfree(hca_param);
        kfree(func_cap);
        kfree(dev_cap);
        return err;
}

static void mlx4_request_modules(struct mlx4_dev *dev)
{
        int port;
        int has_ib_port = false;
        int has_eth_port = false;
#define EN_DRV_NAME     "mlx4_en"
#define IB_DRV_NAME     "mlx4_ib"

        for (port = 1; port <= dev->caps.num_ports; port++) {
                if (dev->caps.port_type[port] == MLX4_PORT_TYPE_IB)
                        has_ib_port = true;
                else if (dev->caps.port_type[port] == MLX4_PORT_TYPE_ETH)
                        has_eth_port = true;
        }

        if (has_eth_port)
                request_module_nowait(EN_DRV_NAME);
        if (has_ib_port || (dev->caps.flags & MLX4_DEV_CAP_FLAG_IBOE))
                request_module_nowait(IB_DRV_NAME);
}

/*
 * 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);
                if (err) {
                        mlx4_err(dev, "Failed to register device\n");
                        goto out;
                }
                mlx4_request_modules(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 int __set_port_type(struct mlx4_port_info *info,
                           enum mlx4_port_type port_type)
{
        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 ((port_type & mdev->caps.supported_type[info->port]) != port_type) {
                mlx4_err(mdev,
                         "Requested port type for port %d is not supported on this HCA\n",
                         info->port);
                err = -EINVAL;
                goto err_sup;
        }

        mlx4_stop_sense(mdev);
        mutex_lock(&priv->port_mutex);
        info->tmp_type = port_type;

        /* 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);
err_sup:
        return err;
}

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;
        enum mlx4_port_type port_type;
        static DEFINE_MUTEX(set_port_type_mutex);
        int err;

        mutex_lock(&set_port_type_mutex);

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

        err = __set_port_type(info, port_type);

err_out:
        mutex_unlock(&set_port_type_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 = kstrtoint(buf, 0, &mtu);
        if (!err)
                ibta_mtu = int_to_ibta_mtu(mtu);

        if (err || 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;
}

/* bond for multi-function device */
#define MAX_MF_BOND_ALLOWED_SLAVES 63
static int mlx4_mf_bond(struct mlx4_dev *dev)
{
        int err = 0;
        int nvfs;
        struct mlx4_slaves_pport slaves_port1;
        struct mlx4_slaves_pport slaves_port2;
        DECLARE_BITMAP(slaves_port_1_2, MLX4_MFUNC_MAX);

        slaves_port1 = mlx4_phys_to_slaves_pport(dev, 1);
        slaves_port2 = mlx4_phys_to_slaves_pport(dev, 2);
        bitmap_and(slaves_port_1_2,
                   slaves_port1.slaves, slaves_port2.slaves,
                   dev->persist->num_vfs + 1);

        /* only single port vfs are allowed */
        if (bitmap_weight(slaves_port_1_2, dev->persist->num_vfs + 1) > 1) {
                mlx4_warn(dev, "HA mode unsupported for dual ported VFs\n");
                return -EINVAL;
        }

        /* number of virtual functions is number of total functions minus one
         * physical function for each port.
         */
        nvfs = bitmap_weight(slaves_port1.slaves, dev->persist->num_vfs + 1) +
                bitmap_weight(slaves_port2.slaves, dev->persist->num_vfs + 1) - 2;

        /* limit on maximum allowed VFs */
        if (nvfs > MAX_MF_BOND_ALLOWED_SLAVES) {
                mlx4_warn(dev, "HA mode is not supported for %d VFs (max %d are allowed)\n",
                          nvfs, MAX_MF_BOND_ALLOWED_SLAVES);
                return -EINVAL;
        }

        if (dev->caps.steering_mode != MLX4_STEERING_MODE_DEVICE_MANAGED) {
                mlx4_warn(dev, "HA mode unsupported for NON DMFS steering\n");
                return -EINVAL;
        }

        err = mlx4_bond_mac_table(dev);
        if (err)
                return err;
        err = mlx4_bond_vlan_table(dev);
        if (err)
                goto err1;
        err = mlx4_bond_fs_rules(dev);
        if (err)
                goto err2;

        return 0;
err2:
        (void)mlx4_unbond_vlan_table(dev);
err1:
        (void)mlx4_unbond_mac_table(dev);
        return err;
}

static int mlx4_mf_unbond(struct mlx4_dev *dev)
{
        int ret, ret1;

        ret = mlx4_unbond_fs_rules(dev);
        if (ret)
                mlx4_warn(dev, "multifunction unbond for flow rules failed (%d)\n", ret);
        ret1 = mlx4_unbond_mac_table(dev);
        if (ret1) {
                mlx4_warn(dev, "multifunction unbond for MAC table failed (%d)\n", ret1);
                ret = ret1;
        }
        ret1 = mlx4_unbond_vlan_table(dev);
        if (ret1) {
                mlx4_warn(dev, "multifunction unbond for VLAN table failed (%d)\n", ret1);
                ret = ret1;
        }
        return ret;
}

int mlx4_bond(struct mlx4_dev *dev)
{
        int ret = 0;
        struct mlx4_priv *priv = mlx4_priv(dev);

        mutex_lock(&priv->bond_mutex);

        if (!mlx4_is_bonded(dev)) {
                ret = mlx4_do_bond(dev, true);
                if (ret)
                        mlx4_err(dev, "Failed to bond device: %d\n", ret);
                if (!ret && mlx4_is_master(dev)) {
                        ret = mlx4_mf_bond(dev);
                        if (ret) {
                                mlx4_err(dev, "bond for multifunction failed\n");
                                mlx4_do_bond(dev, false);
                        }
                }
        }

        mutex_unlock(&priv->bond_mutex);
        if (!ret)
                mlx4_dbg(dev, "Device is bonded\n");

        return ret;
}
EXPORT_SYMBOL_GPL(mlx4_bond);

int mlx4_unbond(struct mlx4_dev *dev)
{
        int ret = 0;
        struct mlx4_priv *priv = mlx4_priv(dev);

        mutex_lock(&priv->bond_mutex);

        if (mlx4_is_bonded(dev)) {
                int ret2 = 0;

                ret = mlx4_do_bond(dev, false);
                if (ret)
                        mlx4_err(dev, "Failed to unbond device: %d\n", ret);
                if (mlx4_is_master(dev))
                        ret2 = mlx4_mf_unbond(dev);
                if (ret2) {
                        mlx4_warn(dev, "Failed to unbond device for multifunction (%d)\n", ret2);
                        ret = ret2;
                }
        }

        mutex_unlock(&priv->bond_mutex);
        if (!ret)
                mlx4_dbg(dev, "Device is unbonded\n");

        return ret;
}
EXPORT_SYMBOL_GPL(mlx4_unbond);


int mlx4_port_map_set(struct mlx4_dev *dev, struct mlx4_port_map *v2p)
{
        u8 port1 = v2p->port1;
        u8 port2 = v2p->port2;
        struct mlx4_priv *priv = mlx4_priv(dev);
        int err;

        if (!(dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_PORT_REMAP))
                return -EOPNOTSUPP;

        mutex_lock(&priv->bond_mutex);

        /* zero means keep current mapping for this port */
        if (port1 == 0)
                port1 = priv->v2p.port1;
        if (port2 == 0)
                port2 = priv->v2p.port2;

        if ((port1 < 1) || (port1 > MLX4_MAX_PORTS) ||
            (port2 < 1) || (port2 > MLX4_MAX_PORTS) ||
            (port1 == 2 && port2 == 1)) {
                /* besides boundary checks cross mapping makes
                 * no sense and therefore not allowed */
                err = -EINVAL;
        } else if ((port1 == priv->v2p.port1) &&
                 (port2 == priv->v2p.port2)) {
                err = 0;
        } else {
                err = mlx4_virt2phy_port_map(dev, port1, port2);
                if (!err) {
                        mlx4_dbg(dev, "port map changed: [%d][%d]\n",
                                 port1, port2);
                        priv->v2p.port1 = port1;
                        priv->v2p.port2 = port2;
                } else {
                        mlx4_err(dev, "Failed to change port mape: %d\n", err);
                }
        }

        mutex_unlock(&priv->bond_mutex);
        return err;
}
EXPORT_SYMBOL_GPL(mlx4_port_map_set);

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 = dev->phys_caps.num_phys_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 = dev->phys_caps.num_phys_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_CMD_NA_OP,
                          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->persist->pdev, 2) +
                        (dev->caps.num_uars << PAGE_SHIFT);
        bf_len = pci_resource_len(dev->persist->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);
}

u64 mlx4_read_clock(struct mlx4_dev *dev)
{
        u32 clockhi, clocklo, clockhi1;
        u64 cycles;
        int i;
        struct mlx4_priv *priv = mlx4_priv(dev);

        for (i = 0; i < 10; i++) {
                clockhi = swab32(readl(priv->clock_mapping));
                clocklo = swab32(readl(priv->clock_mapping + 4));
                clockhi1 = swab32(readl(priv->clock_mapping));
                if (clockhi == clockhi1)
                        break;
        }

        cycles = (u64) clockhi << 32 | (u64) clocklo;

        return cycles;
}
EXPORT_SYMBOL_GPL(mlx4_read_clock);


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

        priv->clock_mapping =
                ioremap(pci_resource_start(dev->persist->pdev,
                                           priv->fw.clock_bar) +
                        priv->fw.clock_offset, MLX4_CLOCK_SIZE);

        if (!priv->clock_mapping)
                return -ENOMEM;

        return 0;
}

int mlx4_get_internal_clock_params(struct mlx4_dev *dev,
                                   struct mlx4_clock_params *params)
{
        struct mlx4_priv *priv = mlx4_priv(dev);

        if (mlx4_is_slave(dev))
                return -EOPNOTSUPP;

        if (!params)
                return -EINVAL;

        params->bar = priv->fw.clock_bar;
        params->offset = priv->fw.clock_offset;
        params->size = MLX4_CLOCK_SIZE;

        return 0;
}
EXPORT_SYMBOL_GPL(mlx4_get_internal_clock_params);

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

        if (priv->clock_mapping)
                iounmap(priv->clock_mapping);
}

static void mlx4_close_hca(struct mlx4_dev *dev)
{
        unmap_internal_clock(dev);
        unmap_bf_area(dev);
        if (mlx4_is_slave(dev))
                mlx4_slave_exit(dev);
        else {
                mlx4_CLOSE_HCA(dev, 0);
                mlx4_free_icms(dev);
        }
}

static void mlx4_close_fw(struct mlx4_dev *dev)
{
        if (!mlx4_is_slave(dev)) {
                mlx4_UNMAP_FA(dev);
                mlx4_free_icm(dev, mlx4_priv(dev)->fw.fw_icm, 0);
        }
}

static int mlx4_comm_check_offline(struct mlx4_dev *dev)
{
#define COMM_CHAN_OFFLINE_OFFSET 0x09

        u32 comm_flags;
        u32 offline_bit;
        unsigned long end;
        struct mlx4_priv *priv = mlx4_priv(dev);

        end = msecs_to_jiffies(MLX4_COMM_OFFLINE_TIME_OUT) + jiffies;
        while (time_before(jiffies, end)) {
                comm_flags = swab32(readl((__iomem char *)priv->mfunc.comm +
                                          MLX4_COMM_CHAN_FLAGS));
                offline_bit = (comm_flags &
                               (u32)(1 << COMM_CHAN_OFFLINE_OFFSET));
                if (!offline_bit)
                        return 0;

                /* If device removal has been requested,
                 * do not continue retrying.
                 */
                if (dev->persist->interface_state &
                    MLX4_INTERFACE_STATE_NOWAIT)
                        break;

                /* There are cases as part of AER/Reset flow that PF needs
                 * around 100 msec to load. We therefore sleep for 100 msec
                 * to allow other tasks to make use of that CPU during this
                 * time interval.
                 */
                msleep(100);
        }
        mlx4_err(dev, "Communication channel is offline.\n");
        return -EIO;
}

static void mlx4_reset_vf_support(struct mlx4_dev *dev)
{
#define COMM_CHAN_RST_OFFSET 0x1e

        struct mlx4_priv *priv = mlx4_priv(dev);
        u32 comm_rst;
        u32 comm_caps;

        comm_caps = swab32(readl((__iomem char *)priv->mfunc.comm +
                                 MLX4_COMM_CHAN_CAPS));
        comm_rst = (comm_caps & (u32)(1 << COMM_CHAN_RST_OFFSET));

        if (comm_rst)
                dev->caps.vf_caps |= MLX4_VF_CAP_FLAG_RESET;
}

static int mlx4_init_slave(struct mlx4_dev *dev)
{
        struct mlx4_priv *priv = mlx4_priv(dev);
        u64 dma = (u64) priv->mfunc.vhcr_dma;
        int ret_from_reset = 0;
        u32 slave_read;
        u32 cmd_channel_ver;

        if (atomic_read(&pf_loading)) {
                mlx4_warn(dev, "PF is not ready - Deferring probe\n");
                return -EPROBE_DEFER;
        }

        mutex_lock(&priv->cmd.slave_cmd_mutex);
        priv->cmd.max_cmds = 1;
        if (mlx4_comm_check_offline(dev)) {
                mlx4_err(dev, "PF is not responsive, skipping initialization\n");
                goto err_offline;
        }

        mlx4_reset_vf_support(dev);
        mlx4_warn(dev, "Sending reset\n");
        ret_from_reset = mlx4_comm_cmd(dev, MLX4_COMM_CMD_RESET, 0,
                                       MLX4_COMM_CMD_NA_OP, 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) {
                        mlx4_warn(dev, "slave is currently in the middle of FLR - Deferring probe\n");
                        mutex_unlock(&priv->cmd.slave_cmd_mutex);
                        return -EPROBE_DEFER;
                } 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_CMD_NA_OP, MLX4_COMM_TIME))
                goto err;
        if (mlx4_comm_cmd(dev, MLX4_COMM_CMD_VHCR1, dma >> 32,
                             MLX4_COMM_CMD_NA_OP, MLX4_COMM_TIME))
                goto err;
        if (mlx4_comm_cmd(dev, MLX4_COMM_CMD_VHCR2, dma >> 16,
                             MLX4_COMM_CMD_NA_OP, MLX4_COMM_TIME))
                goto err;
        if (mlx4_comm_cmd(dev, MLX4_COMM_CMD_VHCR_EN, dma,
                          MLX4_COMM_CMD_NA_OP, MLX4_COMM_TIME))
                goto err;

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

err:
        mlx4_comm_cmd(dev, MLX4_COMM_CMD_RESET, 0, MLX4_COMM_CMD_NA_OP, 0);
err_offline:
        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++) {
                if (dev->caps.port_type[i] == MLX4_PORT_TYPE_ETH)
                        dev->caps.gid_table_len[i] =
                                mlx4_get_slave_num_gids(dev, 0, i);
                else
                        dev->caps.gid_table_len[i] = 1;
                dev->caps.pkey_table_len[i] =
                        dev->phys_caps.pkey_phys_table_len[i] - 1;
        }
}

static int choose_log_fs_mgm_entry_size(int qp_per_entry)
{
        int i = MLX4_MIN_MGM_LOG_ENTRY_SIZE;

        for (i = MLX4_MIN_MGM_LOG_ENTRY_SIZE; i <= MLX4_MAX_MGM_LOG_ENTRY_SIZE;
              i++) {
                if (qp_per_entry <= 4 * ((1 << i) / 16 - 2))
                        break;
        }

        return (i <= MLX4_MAX_MGM_LOG_ENTRY_SIZE) ? i : -1;
}

static const char *dmfs_high_rate_steering_mode_str(int dmfs_high_steer_mode)
{
        switch (dmfs_high_steer_mode) {
        case MLX4_STEERING_DMFS_A0_DEFAULT:
                return "default performance";

        case MLX4_STEERING_DMFS_A0_DYNAMIC:
                return "dynamic hybrid mode";

        case MLX4_STEERING_DMFS_A0_STATIC:
                return "performance optimized for limited rule configuration (static)";

        case MLX4_STEERING_DMFS_A0_DISABLE:
                return "disabled performance optimized steering";

        case MLX4_STEERING_DMFS_A0_NOT_SUPPORTED:
                return "performance optimized steering not supported";

        default:
                return "Unrecognized mode";
        }
}

#define MLX4_DMFS_A0_STEERING                   (1UL << 2)

static void choose_steering_mode(struct mlx4_dev *dev,
                                 struct mlx4_dev_cap *dev_cap)
{
        if (mlx4_log_num_mgm_entry_size <= 0) {
                if ((-mlx4_log_num_mgm_entry_size) & MLX4_DMFS_A0_STEERING) {
                        if (dev->caps.dmfs_high_steer_mode ==
                            MLX4_STEERING_DMFS_A0_NOT_SUPPORTED)
                                mlx4_err(dev, "DMFS high rate mode not supported\n");
                        else
                                dev->caps.dmfs_high_steer_mode =
                                        MLX4_STEERING_DMFS_A0_STATIC;
                }
        }

        if (mlx4_log_num_mgm_entry_size <= 0 &&
            dev_cap->flags2 & MLX4_DEV_CAP_FLAG2_FS_EN &&
            (!mlx4_is_mfunc(dev) ||
             (dev_cap->fs_max_num_qp_per_entry >=
             (dev->persist->num_vfs + 1))) &&
            choose_log_fs_mgm_entry_size(dev_cap->fs_max_num_qp_per_entry) >=
                MLX4_MIN_MGM_LOG_ENTRY_SIZE) {
                dev->oper_log_mgm_entry_size =
                        choose_log_fs_mgm_entry_size(dev_cap->fs_max_num_qp_per_entry);
                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.dmfs_high_steer_mode !=
                    MLX4_STEERING_DMFS_A0_NOT_SUPPORTED)
                        dev->caps.dmfs_high_steer_mode = MLX4_STEERING_DMFS_A0_DISABLE;
                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 both UC_STEER and MC_STEER flags set to use B0 steering - falling back to A0 steering mode\n");
                }
                dev->oper_log_mgm_entry_size =
                        mlx4_log_num_mgm_entry_size > 0 ?
                        mlx4_log_num_mgm_entry_size :
                        MLX4_DEFAULT_MGM_LOG_ENTRY_SIZE;
                dev->caps.num_qp_per_mgm = mlx4_get_qp_per_mgm(dev);
        }
        mlx4_dbg(dev, "Steering mode is: %s, oper_log_mgm_entry_size = %d, modparam log_num_mgm_entry_size = %d\n",
                 mlx4_steering_mode_str(dev->caps.steering_mode),
                 dev->oper_log_mgm_entry_size,
                 mlx4_log_num_mgm_entry_size);
}

static void choose_tunnel_offload_mode(struct mlx4_dev *dev,
                                       struct mlx4_dev_cap *dev_cap)
{
        if (dev->caps.steering_mode == MLX4_STEERING_MODE_DEVICE_MANAGED &&
            dev_cap->flags2 & MLX4_DEV_CAP_FLAG2_VXLAN_OFFLOADS)
                dev->caps.tunnel_offload_mode = MLX4_TUNNEL_OFFLOAD_MODE_VXLAN;
        else
                dev->caps.tunnel_offload_mode = MLX4_TUNNEL_OFFLOAD_MODE_NONE;

        mlx4_dbg(dev, "Tunneling offload mode is: %s\n",  (dev->caps.tunnel_offload_mode
                 == MLX4_TUNNEL_OFFLOAD_MODE_VXLAN) ? "vxlan" : "none");
}

static int mlx4_validate_optimized_steering(struct mlx4_dev *dev)
{
        int i;
        struct mlx4_port_cap port_cap;

        if (dev->caps.dmfs_high_steer_mode == MLX4_STEERING_DMFS_A0_NOT_SUPPORTED)
                return -EINVAL;

        for (i = 1; i <= dev->caps.num_ports; i++) {
                if (mlx4_dev_port(dev, i, &port_cap)) {
                        mlx4_err(dev,
                                 "QUERY_DEV_CAP command failed, can't veify DMFS high rate steering.\n");
                } else if ((dev->caps.dmfs_high_steer_mode !=
                            MLX4_STEERING_DMFS_A0_DEFAULT) &&
                           (port_cap.dmfs_optimized_state ==
                            !!(dev->caps.dmfs_high_steer_mode ==
                            MLX4_STEERING_DMFS_A0_DISABLE))) {
                        mlx4_err(dev,
                                 "DMFS high rate steer mode differ, driver requested %s but %s in FW.\n",
                                 dmfs_high_rate_steering_mode_str(
                                        dev->caps.dmfs_high_steer_mode),
                                 (port_cap.dmfs_optimized_state ?
                                        "enabled" : "disabled"));
                }
        }

        return 0;
}

static int mlx4_init_fw(struct mlx4_dev *dev)
{
        struct mlx4_mod_stat_cfg   mlx4_cfg;
        int err = 0;

        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");
        }

        return err;
}

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_profile        profile;
        struct mlx4_init_hca_param init_hca;
        u64 icm_size;
        struct mlx4_config_dev_params params;
        int err;

        if (!mlx4_is_slave(dev)) {
                err = mlx4_dev_cap(dev, &dev_cap);
                if (err) {
                        mlx4_err(dev, "QUERY_DEV_CAP command failed, aborting\n");
                        return err;
                }

                choose_steering_mode(dev, &dev_cap);
                choose_tunnel_offload_mode(dev, &dev_cap);

                if (dev->caps.dmfs_high_steer_mode == MLX4_STEERING_DMFS_A0_STATIC &&
                    mlx4_is_master(dev))
                        dev->caps.function_caps |= MLX4_FUNC_CAP_DMFS_A0_STATIC;

                err = mlx4_get_phys_port_id(dev);
                if (err)
                        mlx4_err(dev, "Fail to get physical port id\n");

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

                if (mlx4_low_memory_profile()) {
                        mlx4_info(dev, "Running from within kdump kernel. Using low memory profile\n");
                        profile = low_mem_profile;
                } else {
                        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;
                        return err;
                }

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

                if (enable_4k_uar || !dev->persist->num_vfs) {
                        init_hca.log_uar_sz = ilog2(dev->caps.num_uars) +
                                                    PAGE_SHIFT - DEFAULT_UAR_PAGE_SHIFT;
                        init_hca.uar_page_sz = DEFAULT_UAR_PAGE_SHIFT - 12;
                } else {
                        init_hca.log_uar_sz = ilog2(dev->caps.num_uars);
                        init_hca.uar_page_sz = PAGE_SHIFT - 12;
                }

                init_hca.mw_enabled = 0;
                if (dev->caps.flags & MLX4_DEV_CAP_FLAG_MEM_WINDOW ||
                    dev->caps.bmme_flags & MLX4_BMME_FLAG_TYPE_2_WIN)
                        init_hca.mw_enabled = INIT_HCA_TPT_MW_ENABLE;

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

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

                if (dev_cap.flags2 & MLX4_DEV_CAP_FLAG2_SYS_EQS) {
                        err = mlx4_query_func(dev, &dev_cap);
                        if (err < 0) {
                                mlx4_err(dev, "QUERY_FUNC command failed, aborting.\n");
                                goto err_close;
                        } else if (err & MLX4_QUERY_FUNC_NUM_SYS_EQS) {
                                dev->caps.num_eqs = dev_cap.max_eqs;
                                dev->caps.reserved_eqs = dev_cap.reserved_eqs;
                                dev->caps.reserved_uars = dev_cap.reserved_uars;
                        }
                }

                /*
                 * If TS is supported by FW
                 * read HCA frequency by QUERY_HCA command
                 */
                if (dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_TS) {
                        memset(&init_hca, 0, sizeof(init_hca));
                        err = mlx4_QUERY_HCA(dev, &init_hca);
                        if (err) {
                                mlx4_err(dev, "QUERY_HCA command failed, disable timestamp\n");
                                dev->caps.flags2 &= ~MLX4_DEV_CAP_FLAG2_TS;
                        } else {
                                dev->caps.hca_core_clock =
                                        init_hca.hca_core_clock;
                        }

                        /* In case we got HCA frequency 0 - disable timestamping
                         * to avoid dividing by zero
                         */
                        if (!dev->caps.hca_core_clock) {
                                dev->caps.flags2 &= ~MLX4_DEV_CAP_FLAG2_TS;
                                mlx4_err(dev,
                                         "HCA frequency is 0 - timestamping is not supported\n");
                        } else if (map_internal_clock(dev)) {
                                /*
                                 * Map internal clock,
                                 * in case of failure disable timestamping
                                 */
                                dev->caps.flags2 &= ~MLX4_DEV_CAP_FLAG2_TS;
                                mlx4_err(dev, "Failed to map internal clock. Timestamping is not supported\n");
                        }
                }

                if (dev->caps.dmfs_high_steer_mode !=
                    MLX4_STEERING_DMFS_A0_NOT_SUPPORTED) {
                        if (mlx4_validate_optimized_steering(dev))
                                mlx4_warn(dev, "Optimized steering validation failed\n");

                        if (dev->caps.dmfs_high_steer_mode ==
                            MLX4_STEERING_DMFS_A0_DISABLE) {
                                dev->caps.dmfs_high_rate_qpn_base =
                                        dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FW];
                                dev->caps.dmfs_high_rate_qpn_range =
                                        MLX4_A0_STEERING_TABLE_SIZE;
                        }

                        mlx4_info(dev, "DMFS high rate steer mode is: %s\n",
                                  dmfs_high_rate_steering_mode_str(
                                        dev->caps.dmfs_high_steer_mode));
                }
        } else {
                err = mlx4_init_slave(dev);
                if (err) {
                        if (err != -EPROBE_DEFER)
                                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;
        }

        /* Query CONFIG_DEV parameters */
        err = mlx4_config_dev_retrieval(dev, &params);
        if (err && err != -EOPNOTSUPP) {
                mlx4_err(dev, "Failed to query CONFIG_DEV parameters\n");
        } else if (!err) {
                dev->caps.rx_checksum_flags_port[1] = params.rx_csum_flags_port_1;
                dev->caps.rx_checksum_flags_port[2] = params.rx_csum_flags_port_2;
        }
        priv->eq_table.inta_pin = adapter.inta_pin;
        memcpy(dev->board_id, adapter.board_id, sizeof(dev->board_id));

        return 0;

unmap_bf:
        unmap_internal_clock(dev);
        unmap_bf_area(dev);

        if (mlx4_is_slave(dev))
                mlx4_slave_destroy_special_qp_cap(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);

        return err;
}

static int mlx4_init_counters_table(struct mlx4_dev *dev)
{
        struct mlx4_priv *priv = mlx4_priv(dev);
        int nent_pow2;

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

        if (!dev->caps.max_counters)
                return -ENOSPC;

        nent_pow2 = roundup_pow_of_two(dev->caps.max_counters);
        /* reserve last counter index for sink counter */
        return mlx4_bitmap_init(&priv->counters_bitmap, nent_pow2,
                                nent_pow2 - 1, 0,
                                nent_pow2 - dev->caps.max_counters + 1);
}

static void mlx4_cleanup_counters_table(struct mlx4_dev *dev)
{
        if (!(dev->caps.flags & MLX4_DEV_CAP_FLAG_COUNTERS))
                return;

        if (!dev->caps.max_counters)
                return;

        mlx4_bitmap_cleanup(&mlx4_priv(dev)->counters_bitmap);
}

static void mlx4_cleanup_default_counters(struct mlx4_dev *dev)
{
        struct mlx4_priv *priv = mlx4_priv(dev);
        int port;

        for (port = 0; port < dev->caps.num_ports; port++)
                if (priv->def_counter[port] != -1)
                        mlx4_counter_free(dev,  priv->def_counter[port]);
}

static int mlx4_allocate_default_counters(struct mlx4_dev *dev)
{
        struct mlx4_priv *priv = mlx4_priv(dev);
        int port, err = 0;
        u32 idx;

        for (port = 0; port < dev->caps.num_ports; port++)
                priv->def_counter[port] = -1;

        for (port = 0; port < dev->caps.num_ports; port++) {
                err = mlx4_counter_alloc(dev, &idx, MLX4_RES_USAGE_DRIVER);

                if (!err || err == -ENOSPC) {
                        priv->def_counter[port] = idx;
                } else if (err == -ENOENT) {
                        err = 0;
                        continue;
                } else if (mlx4_is_slave(dev) && err == -EINVAL) {
                        priv->def_counter[port] = MLX4_SINK_COUNTER_INDEX(dev);
                        mlx4_warn(dev, "can't allocate counter from old PF driver, using index %d\n",
                                  MLX4_SINK_COUNTER_INDEX(dev));
                        err = 0;
                } else {
                        mlx4_err(dev, "%s: failed to allocate default counter port %d err %d\n",
                                 __func__, port + 1, err);
                        mlx4_cleanup_default_counters(dev);
                        return err;
                }

                mlx4_dbg(dev, "%s: default counter index %d for port %d\n",
                         __func__, priv->def_counter[port], port + 1);
        }

        return err;
}

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) {
                *idx = MLX4_SINK_COUNTER_INDEX(dev);
                return -ENOSPC;
        }

        return 0;
}

int mlx4_counter_alloc(struct mlx4_dev *dev, u32 *idx, u8 usage)
{
        u32 in_modifier = RES_COUNTER | (((u32)usage & 3) << 30);
        u64 out_param;
        int err;

        if (mlx4_is_mfunc(dev)) {
                err = mlx4_cmd_imm(dev, 0, &out_param, in_modifier,
                                   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);

static int __mlx4_clear_if_stat(struct mlx4_dev *dev,
                                u8 counter_index)
{
        struct mlx4_cmd_mailbox *if_stat_mailbox;
        int err;
        u32 if_stat_in_mod = (counter_index & 0xff) | MLX4_QUERY_IF_STAT_RESET;

        if_stat_mailbox = mlx4_alloc_cmd_mailbox(dev);
        if (IS_ERR(if_stat_mailbox))
                return PTR_ERR(if_stat_mailbox);

        err = mlx4_cmd_box(dev, 0, if_stat_mailbox->dma, if_stat_in_mod, 0,
                           MLX4_CMD_QUERY_IF_STAT, MLX4_CMD_TIME_CLASS_C,
                           MLX4_CMD_NATIVE);

        mlx4_free_cmd_mailbox(dev, if_stat_mailbox);
        return err;
}

void __mlx4_counter_free(struct mlx4_dev *dev, u32 idx)
{
        if (!(dev->caps.flags & MLX4_DEV_CAP_FLAG_COUNTERS))
                return;

        if (idx == MLX4_SINK_COUNTER_INDEX(dev))
                return;

        __mlx4_clear_if_stat(dev, idx);

        mlx4_bitmap_free(&mlx4_priv(dev)->counters_bitmap, idx, MLX4_USE_RR);
        return;
}

void mlx4_counter_free(struct mlx4_dev *dev, u32 idx)
{
        u64 in_param = 0;

        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);

int mlx4_get_default_counter_index(struct mlx4_dev *dev, int port)
{
        struct mlx4_priv *priv = mlx4_priv(dev);

        return priv->def_counter[port - 1];
}
EXPORT_SYMBOL_GPL(mlx4_get_default_counter_index);

void mlx4_set_admin_guid(struct mlx4_dev *dev, __be64 guid, int entry, int port)
{
        struct mlx4_priv *priv = mlx4_priv(dev);

        priv->mfunc.master.vf_admin[entry].vport[port].guid = guid;
}
EXPORT_SYMBOL_GPL(mlx4_set_admin_guid);

__be64 mlx4_get_admin_guid(struct mlx4_dev *dev, int entry, int port)
{
        struct mlx4_priv *priv = mlx4_priv(dev);

        return priv->mfunc.master.vf_admin[entry].vport[port].guid;
}
EXPORT_SYMBOL_GPL(mlx4_get_admin_guid);

void mlx4_set_random_admin_guid(struct mlx4_dev *dev, int entry, int port)
{
        struct mlx4_priv *priv = mlx4_priv(dev);
        __be64 guid;

        /* hw GUID */
        if (entry == 0)
                return;

        get_random_bytes((char *)&guid, sizeof(guid));
        guid &= ~(cpu_to_be64(1ULL << 56));
        guid |= cpu_to_be64(1ULL << 57);
        priv->mfunc.master.vf_admin[entry].vport[port].guid = guid;
}

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;
        }

        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_mr_table_free;
                }
                err = mlx4_config_mad_demux(dev);
                if (err) {
                        mlx4_err(dev, "Failed in config_mad_demux, aborting\n");
                        goto err_mcg_table_free;
                }
        }

        err = mlx4_init_eq_table(dev);
        if (err) {
                mlx4_err(dev, "Failed to initialize event queue table, aborting\n");
                goto err_mcg_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[MLX4_EQ_ASYNC].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[MLX4_EQ_ASYNC].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_counters_table(dev);
                if (err && err != -ENOENT) {
                        mlx4_err(dev, "Failed to initialize counters table, aborting\n");
                        goto err_qp_table_free;
                }
        }

        err = mlx4_allocate_default_counters(dev);
        if (err) {
                mlx4_err(dev, "Failed to allocate default counters, aborting\n");
                goto err_counters_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_default_countes_free;
                        }
                }
        }

        return 0;

err_default_countes_free:
        mlx4_cleanup_default_counters(dev);

err_counters_table_free:
        if (!mlx4_is_slave(dev))
                mlx4_cleanup_counters_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_mcg_table_free:
        if (!mlx4_is_slave(dev))
                mlx4_cleanup_mcg_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 int mlx4_init_affinity_hint(struct mlx4_dev *dev, int port, int eqn)
{
        int requested_cpu = 0;
        struct mlx4_priv *priv = mlx4_priv(dev);
        struct mlx4_eq *eq;
        int off = 0;
        int i;

        if (eqn > dev->caps.num_comp_vectors)
                return -EINVAL;

        for (i = 1; i < port; i++)
                off += mlx4_get_eqs_per_port(dev, i);

        requested_cpu = eqn - off - !!(eqn > MLX4_EQ_ASYNC);

        /* Meaning EQs are shared, and this call comes from the second port */
        if (requested_cpu < 0)
                return 0;

        eq = &priv->eq_table.eq[eqn];

        if (!zalloc_cpumask_var(&eq->affinity_mask, GFP_KERNEL))
                return -ENOMEM;

        cpumask_set_cpu(requested_cpu, eq->affinity_mask);

        return 0;
}

static void mlx4_enable_msi_x(struct mlx4_dev *dev)
{
        struct mlx4_priv *priv = mlx4_priv(dev);
        struct msix_entry *entries;
        int i;
        int port = 0;

        if (msi_x) {
                int nreq = min3(dev->caps.num_ports *
                                (int)num_online_cpus() + 1,
                                dev->caps.num_eqs - dev->caps.reserved_eqs,
                                MAX_MSIX);

                if (msi_x > 1)
                        nreq = min_t(int, nreq, msi_x);

                entries = kcalloc(nreq, sizeof(*entries), GFP_KERNEL);
                if (!entries)
                        goto no_msi;

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

                nreq = pci_enable_msix_range(dev->persist->pdev, entries, 2,
                                             nreq);

                if (nreq < 0 || nreq < MLX4_EQ_ASYNC) {
                        kfree(entries);
                        goto no_msi;
                }
                /* 1 is reserved for events (asyncrounous EQ) */
                dev->caps.num_comp_vectors = nreq - 1;

                priv->eq_table.eq[MLX4_EQ_ASYNC].irq = entries[0].vector;
                bitmap_zero(priv->eq_table.eq[MLX4_EQ_ASYNC].actv_ports.ports,
                            dev->caps.num_ports);

                for (i = 0; i < dev->caps.num_comp_vectors + 1; i++) {
                        if (i == MLX4_EQ_ASYNC)
                                continue;

                        priv->eq_table.eq[i].irq =
                                entries[i + 1 - !!(i > MLX4_EQ_ASYNC)].vector;

                        if (MLX4_IS_LEGACY_EQ_MODE(dev->caps)) {
                                bitmap_fill(priv->eq_table.eq[i].actv_ports.ports,
                                            dev->caps.num_ports);
                                /* We don't set affinity hint when there
                                 * aren't enough EQs
                                 */
                        } else {
                                set_bit(port,
                                        priv->eq_table.eq[i].actv_ports.ports);
                                if (mlx4_init_affinity_hint(dev, port + 1, i))
                                        mlx4_warn(dev, "Couldn't init hint cpumask for EQ %d\n",
                                                  i);
                        }
                        /* We divide the Eqs evenly between the two ports.
                         * (dev->caps.num_comp_vectors / dev->caps.num_ports)
                         * refers to the number of Eqs per port
                         * (i.e eqs_per_port). Theoretically, we would like to
                         * write something like (i + 1) % eqs_per_port == 0.
                         * However, since there's an asynchronous Eq, we have
                         * to skip over it by comparing this condition to
                         * !!((i + 1) > MLX4_EQ_ASYNC).
                         */
                        if ((dev->caps.num_comp_vectors > dev->caps.num_ports) &&
                            ((i + 1) %
                             (dev->caps.num_comp_vectors / dev->caps.num_ports)) ==
                            !!((i + 1) > MLX4_EQ_ASYNC))
                                /* If dev->caps.num_comp_vectors < dev->caps.num_ports,
                                 * everything is shared anyway.
                                 */
                                port++;
                }

                dev->flags |= MLX4_FLAG_MSI_X;

                kfree(entries);
                return;
        }