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

#include <linux/errno.h>
#include <linux/if_ether.h>
#include <linux/if_vlan.h>
#include <linux/export.h>

#include <linux/mlx4/cmd.h>

#include "mlx4.h"
#include "mlx4_stats.h"

#define MLX4_MAC_VALID          (1ull << 63)

#define MLX4_VLAN_VALID         (1u << 31)
#define MLX4_VLAN_MASK          0xfff

#define MLX4_STATS_TRAFFIC_COUNTERS_MASK        0xfULL
#define MLX4_STATS_TRAFFIC_DROPS_MASK           0xc0ULL
#define MLX4_STATS_ERROR_COUNTERS_MASK          0x1ffc30ULL
#define MLX4_STATS_PORT_COUNTERS_MASK           0x1fe00000ULL

#define MLX4_FLAG2_V_IGNORE_FCS_MASK            BIT(1)
#define MLX4_FLAG2_V_USER_MTU_MASK              BIT(5)
#define MLX4_FLAG2_V_USER_MAC_MASK              BIT(6)
#define MLX4_FLAG_V_MTU_MASK                    BIT(0)
#define MLX4_FLAG_V_PPRX_MASK                   BIT(1)
#define MLX4_FLAG_V_PPTX_MASK                   BIT(2)
#define MLX4_IGNORE_FCS_MASK                    0x1
#define MLX4_TC_MAX_NUMBER                      8

void mlx4_init_mac_table(struct mlx4_dev *dev, struct mlx4_mac_table *table)
{
        int i;

        mutex_init(&table->mutex);
        for (i = 0; i < MLX4_MAX_MAC_NUM; i++) {
                table->entries[i] = 0;
                table->refs[i]   = 0;
                table->is_dup[i] = false;
        }
        table->max   = 1 << dev->caps.log_num_macs;
        table->total = 0;
}

void mlx4_init_vlan_table(struct mlx4_dev *dev, struct mlx4_vlan_table *table)
{
        int i;

        mutex_init(&table->mutex);
        for (i = 0; i < MLX4_MAX_VLAN_NUM; i++) {
                table->entries[i] = 0;
                table->refs[i]   = 0;
                table->is_dup[i] = false;
        }
        table->max   = (1 << dev->caps.log_num_vlans) - MLX4_VLAN_REGULAR;
        table->total = 0;
}

void mlx4_init_roce_gid_table(struct mlx4_dev *dev,
                              struct mlx4_roce_gid_table *table)
{
        int i;

        mutex_init(&table->mutex);
        for (i = 0; i < MLX4_ROCE_MAX_GIDS; i++)
                memset(table->roce_gids[i].raw, 0, MLX4_ROCE_GID_ENTRY_SIZE);
}

static int validate_index(struct mlx4_dev *dev,
                          struct mlx4_mac_table *table, int index)
{
        int err = 0;

        if (index < 0 || index >= table->max || !table->entries[index]) {
                mlx4_warn(dev, "No valid Mac entry for the given index\n");
                err = -EINVAL;
        }
        return err;
}

static int find_index(struct mlx4_dev *dev,
                      struct mlx4_mac_table *table, u64 mac)
{
        int i;

        for (i = 0; i < MLX4_MAX_MAC_NUM; i++) {
                if (table->refs[i] &&
                    (MLX4_MAC_MASK & mac) ==
                    (MLX4_MAC_MASK & be64_to_cpu(table->entries[i])))
                        return i;
        }
        /* Mac not found */
        return -EINVAL;
}

static int mlx4_set_port_mac_table(struct mlx4_dev *dev, u8 port,
                                   __be64 *entries)
{
        struct mlx4_cmd_mailbox *mailbox;
        u32 in_mod;
        int err;

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

        memcpy(mailbox->buf, entries, MLX4_MAC_TABLE_SIZE);

        in_mod = MLX4_SET_PORT_MAC_TABLE << 8 | port;

        err = mlx4_cmd(dev, mailbox->dma, in_mod, MLX4_SET_PORT_ETH_OPCODE,
                       MLX4_CMD_SET_PORT, MLX4_CMD_TIME_CLASS_B,
                       MLX4_CMD_NATIVE);

        mlx4_free_cmd_mailbox(dev, mailbox);
        return err;
}

int mlx4_find_cached_mac(struct mlx4_dev *dev, u8 port, u64 mac, int *idx)
{
        struct mlx4_port_info *info = &mlx4_priv(dev)->port[port];
        struct mlx4_mac_table *table = &info->mac_table;
        int i;

        for (i = 0; i < MLX4_MAX_MAC_NUM; i++) {
                if (!table->refs[i])
                        continue;

                if (mac == (MLX4_MAC_MASK & be64_to_cpu(table->entries[i]))) {
                        *idx = i;
                        return 0;
                }
        }

        return -ENOENT;
}
EXPORT_SYMBOL_GPL(mlx4_find_cached_mac);

static bool mlx4_need_mf_bond(struct mlx4_dev *dev)
{
        int i, num_eth_ports = 0;

        if (!mlx4_is_mfunc(dev))
                return false;
        mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
                ++num_eth_ports;

        return (num_eth_ports ==  2) ? true : false;
}

int __mlx4_register_mac(struct mlx4_dev *dev, u8 port, u64 mac)
{
        struct mlx4_port_info *info = &mlx4_priv(dev)->port[port];
        struct mlx4_mac_table *table = &info->mac_table;
        int i, err = 0;
        int free = -1;
        int free_for_dup = -1;
        bool dup = mlx4_is_mf_bonded(dev);
        u8 dup_port = (port == 1) ? 2 : 1;
        struct mlx4_mac_table *dup_table = &mlx4_priv(dev)->port[dup_port].mac_table;
        bool need_mf_bond = mlx4_need_mf_bond(dev);
        bool can_mf_bond = true;

        mlx4_dbg(dev, "Registering MAC: 0x%llx for port %d %s duplicate\n",
                 (unsigned long long)mac, port,
                 dup ? "with" : "without");

        if (need_mf_bond) {
                if (port == 1) {
                        mutex_lock(&table->mutex);
                        mutex_lock_nested(&dup_table->mutex, SINGLE_DEPTH_NESTING);
                } else {
                        mutex_lock(&dup_table->mutex);
                        mutex_lock_nested(&table->mutex, SINGLE_DEPTH_NESTING);
                }
        } else {
                mutex_lock(&table->mutex);
        }

        if (need_mf_bond) {
                int index_at_port = -1;
                int index_at_dup_port = -1;

                for (i = 0; i < MLX4_MAX_MAC_NUM; i++) {
                        if (((MLX4_MAC_MASK & mac) == (MLX4_MAC_MASK & be64_to_cpu(table->entries[i]))))
                                index_at_port = i;
                        if (((MLX4_MAC_MASK & mac) == (MLX4_MAC_MASK & be64_to_cpu(dup_table->entries[i]))))
                                index_at_dup_port = i;
                }

                /* check that same mac is not in the tables at different indices */
                if ((index_at_port != index_at_dup_port) &&
                    (index_at_port >= 0) &&
                    (index_at_dup_port >= 0))
                        can_mf_bond = false;

                /* If the mac is already in the primary table, the slot must be
                 * available in the duplicate table as well.
                 */
                if (index_at_port >= 0 && index_at_dup_port < 0 &&
                    dup_table->refs[index_at_port]) {
                        can_mf_bond = false;
                }
                /* If the mac is already in the duplicate table, check that the
                 * corresponding index is not occupied in the primary table, or
                 * the primary table already contains the mac at the same index.
                 * Otherwise, you cannot bond (primary contains a different mac
                 * at that index).
                 */
                if (index_at_dup_port >= 0) {
                        if (!table->refs[index_at_dup_port] ||
                            ((MLX4_MAC_MASK & mac) == (MLX4_MAC_MASK & be64_to_cpu(table->entries[index_at_dup_port]))))
                                free_for_dup = index_at_dup_port;
                        else
                                can_mf_bond = false;
                }
        }

        for (i = 0; i < MLX4_MAX_MAC_NUM; i++) {
                if (!table->refs[i]) {
                        if (free < 0)
                                free = i;
                        if (free_for_dup < 0 && need_mf_bond && can_mf_bond) {
                                if (!dup_table->refs[i])
                                        free_for_dup = i;
                        }
                        continue;
                }

                if ((MLX4_MAC_MASK & mac) ==
                     (MLX4_MAC_MASK & be64_to_cpu(table->entries[i]))) {
                        /* MAC already registered, increment ref count */
                        err = i;
                        ++table->refs[i];
                        if (dup) {
                                u64 dup_mac = MLX4_MAC_MASK & be64_to_cpu(dup_table->entries[i]);

                                if (dup_mac != mac || !dup_table->is_dup[i]) {
                                        mlx4_warn(dev, "register mac: expect duplicate mac 0x%llx on port %d index %d\n",
                                                  mac, dup_port, i);
                                }
                        }
                        goto out;
                }
        }

        if (need_mf_bond && (free_for_dup < 0)) {
                if (dup) {
                        mlx4_warn(dev, "Fail to allocate duplicate MAC table entry\n");
                        mlx4_warn(dev, "High Availability for virtual functions may not work as expected\n");
                        dup = false;
                }
                can_mf_bond = false;
        }

        if (need_mf_bond && can_mf_bond)
                free = free_for_dup;

        mlx4_dbg(dev, "Free MAC index is %d\n", free);

        if (table->total == table->max) {
                /* No free mac entries */
                err = -ENOSPC;
                goto out;
        }

        /* Register new MAC */
        table->entries[free] = cpu_to_be64(mac | MLX4_MAC_VALID);

        err = mlx4_set_port_mac_table(dev, port, table->entries);
        if (unlikely(err)) {
                mlx4_err(dev, "Failed adding MAC: 0x%llx\n",
                         (unsigned long long) mac);
                table->entries[free] = 0;
                goto out;
        }
        table->refs[free] = 1;
        table->is_dup[free] = false;
        ++table->total;
        if (dup) {
                dup_table->refs[free] = 0;
                dup_table->is_dup[free] = true;
                dup_table->entries[free] = cpu_to_be64(mac | MLX4_MAC_VALID);

                err = mlx4_set_port_mac_table(dev, dup_port, dup_table->entries);
                if (unlikely(err)) {
                        mlx4_warn(dev, "Failed adding duplicate mac: 0x%llx\n", mac);
                        dup_table->is_dup[free] = false;
                        dup_table->entries[free] = 0;
                        goto out;
                }
                ++dup_table->total;
        }
        err = free;
out:
        if (need_mf_bond) {
                if (port == 2) {
                        mutex_unlock(&table->mutex);
                        mutex_unlock(&dup_table->mutex);
                } else {
                        mutex_unlock(&dup_table->mutex);
                        mutex_unlock(&table->mutex);
                }
        } else {
                mutex_unlock(&table->mutex);
        }
        return err;
}
EXPORT_SYMBOL_GPL(__mlx4_register_mac);

int mlx4_register_mac(struct mlx4_dev *dev, u8 port, u64 mac)
{
        u64 out_param = 0;
        int err = -EINVAL;

        if (mlx4_is_mfunc(dev)) {
                if (!(dev->flags & MLX4_FLAG_OLD_REG_MAC)) {
                        err = mlx4_cmd_imm(dev, mac, &out_param,
                                           ((u32) port) << 8 | (u32) RES_MAC,
                                           RES_OP_RESERVE_AND_MAP, MLX4_CMD_ALLOC_RES,
                                           MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);
                }
                if (err && err == -EINVAL && mlx4_is_slave(dev)) {
                        /* retry using old REG_MAC format */
                        set_param_l(&out_param, port);
                        err = mlx4_cmd_imm(dev, mac, &out_param, RES_MAC,
                                           RES_OP_RESERVE_AND_MAP, MLX4_CMD_ALLOC_RES,
                                           MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);
                        if (!err)
                                dev->flags |= MLX4_FLAG_OLD_REG_MAC;
                }
                if (err)
                        return err;

                return get_param_l(&out_param);
        }
        return __mlx4_register_mac(dev, port, mac);
}
EXPORT_SYMBOL_GPL(mlx4_register_mac);

int mlx4_get_base_qpn(struct mlx4_dev *dev, u8 port)
{
        return dev->caps.reserved_qps_base[MLX4_QP_REGION_ETH_ADDR] +
                        (port - 1) * (1 << dev->caps.log_num_macs);
}
EXPORT_SYMBOL_GPL(mlx4_get_base_qpn);

void __mlx4_unregister_mac(struct mlx4_dev *dev, u8 port, u64 mac)
{
        struct mlx4_port_info *info;
        struct mlx4_mac_table *table;
        int index;
        bool dup = mlx4_is_mf_bonded(dev);
        u8 dup_port = (port == 1) ? 2 : 1;
        struct mlx4_mac_table *dup_table = &mlx4_priv(dev)->port[dup_port].mac_table;

        if (port < 1 || port > dev->caps.num_ports) {
                mlx4_warn(dev, "invalid port number (%d), aborting...\n", port);
                return;
        }
        info = &mlx4_priv(dev)->port[port];
        table = &info->mac_table;

        if (dup) {
                if (port == 1) {
                        mutex_lock(&table->mutex);
                        mutex_lock_nested(&dup_table->mutex, SINGLE_DEPTH_NESTING);
                } else {
                        mutex_lock(&dup_table->mutex);
                        mutex_lock_nested(&table->mutex, SINGLE_DEPTH_NESTING);
                }
        } else {
                mutex_lock(&table->mutex);
        }

        index = find_index(dev, table, mac);

        if (validate_index(dev, table, index))
                goto out;

        if (--table->refs[index] || table->is_dup[index]) {
                mlx4_dbg(dev, "Have more references for index %d, no need to modify mac table\n",
                         index);
                if (!table->refs[index])
                        dup_table->is_dup[index] = false;
                goto out;
        }

        table->entries[index] = 0;
        if (mlx4_set_port_mac_table(dev, port, table->entries))
                mlx4_warn(dev, "Fail to set mac in port %d during unregister\n", port);
        --table->total;

        if (dup) {
                dup_table->is_dup[index] = false;
                if (dup_table->refs[index])
                        goto out;
                dup_table->entries[index] = 0;
                if (mlx4_set_port_mac_table(dev, dup_port, dup_table->entries))
                        mlx4_warn(dev, "Fail to set mac in duplicate port %d during unregister\n", dup_port);

                --table->total;
        }
out:
        if (dup) {
                if (port == 2) {
                        mutex_unlock(&table->mutex);
                        mutex_unlock(&dup_table->mutex);
                } else {
                        mutex_unlock(&dup_table->mutex);
                        mutex_unlock(&table->mutex);
                }
        } else {
                mutex_unlock(&table->mutex);
        }
}
EXPORT_SYMBOL_GPL(__mlx4_unregister_mac);

void mlx4_unregister_mac(struct mlx4_dev *dev, u8 port, u64 mac)
{
        u64 out_param = 0;

        if (mlx4_is_mfunc(dev)) {
                if (!(dev->flags & MLX4_FLAG_OLD_REG_MAC)) {
                        (void) mlx4_cmd_imm(dev, mac, &out_param,
                                            ((u32) port) << 8 | (u32) RES_MAC,
                                            RES_OP_RESERVE_AND_MAP, MLX4_CMD_FREE_RES,
                                            MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);
                } else {
                        /* use old unregister mac format */
                        set_param_l(&out_param, port);
                        (void) mlx4_cmd_imm(dev, mac, &out_param, RES_MAC,
                                            RES_OP_RESERVE_AND_MAP, MLX4_CMD_FREE_RES,
                                            MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);
                }
                return;
        }
        __mlx4_unregister_mac(dev, port, mac);
        return;
}
EXPORT_SYMBOL_GPL(mlx4_unregister_mac);

int __mlx4_replace_mac(struct mlx4_dev *dev, u8 port, int qpn, u64 new_mac)
{
        struct mlx4_port_info *info = &mlx4_priv(dev)->port[port];
        struct mlx4_mac_table *table = &info->mac_table;
        int index = qpn - info->base_qpn;
        int err = 0;
        bool dup = mlx4_is_mf_bonded(dev);
        u8 dup_port = (port == 1) ? 2 : 1;
        struct mlx4_mac_table *dup_table = &mlx4_priv(dev)->port[dup_port].mac_table;

        /* CX1 doesn't support multi-functions */
        if (dup) {
                if (port == 1) {
                        mutex_lock(&table->mutex);
                        mutex_lock_nested(&dup_table->mutex, SINGLE_DEPTH_NESTING);
                } else {
                        mutex_lock(&dup_table->mutex);
                        mutex_lock_nested(&table->mutex, SINGLE_DEPTH_NESTING);
                }
        } else {
                mutex_lock(&table->mutex);
        }

        err = validate_index(dev, table, index);
        if (err)
                goto out;

        table->entries[index] = cpu_to_be64(new_mac | MLX4_MAC_VALID);

        err = mlx4_set_port_mac_table(dev, port, table->entries);
        if (unlikely(err)) {
                mlx4_err(dev, "Failed adding MAC: 0x%llx\n",
                         (unsigned long long) new_mac);
                table->entries[index] = 0;
        } else {
                if (dup) {
                        dup_table->entries[index] = cpu_to_be64(new_mac | MLX4_MAC_VALID);

                        err = mlx4_set_port_mac_table(dev, dup_port, dup_table->entries);
                        if (unlikely(err)) {
                                mlx4_err(dev, "Failed adding duplicate MAC: 0x%llx\n",
                                         (unsigned long long)new_mac);
                                dup_table->entries[index] = 0;
                        }
                }
        }
out:
        if (dup) {
                if (port == 2) {
                        mutex_unlock(&table->mutex);
                        mutex_unlock(&dup_table->mutex);
                } else {
                        mutex_unlock(&dup_table->mutex);
                        mutex_unlock(&table->mutex);
                }
        } else {
                mutex_unlock(&table->mutex);
        }
        return err;
}
EXPORT_SYMBOL_GPL(__mlx4_replace_mac);

static int mlx4_set_port_vlan_table(struct mlx4_dev *dev, u8 port,
                                    __be32 *entries)
{
        struct mlx4_cmd_mailbox *mailbox;
        u32 in_mod;
        int err;

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

        memcpy(mailbox->buf, entries, MLX4_VLAN_TABLE_SIZE);
        in_mod = MLX4_SET_PORT_VLAN_TABLE << 8 | port;
        err = mlx4_cmd(dev, mailbox->dma, in_mod, MLX4_SET_PORT_ETH_OPCODE,
                       MLX4_CMD_SET_PORT, MLX4_CMD_TIME_CLASS_B,
                       MLX4_CMD_NATIVE);

        mlx4_free_cmd_mailbox(dev, mailbox);

        return err;
}

int mlx4_find_cached_vlan(struct mlx4_dev *dev, u8 port, u16 vid, int *idx)
{
        struct mlx4_vlan_table *table = &mlx4_priv(dev)->port[port].vlan_table;
        int i;

        for (i = 0; i < MLX4_MAX_VLAN_NUM; ++i) {
                if (table->refs[i] &&
                    (vid == (MLX4_VLAN_MASK &
                              be32_to_cpu(table->entries[i])))) {
                        /* VLAN already registered, increase reference count */
                        *idx = i;
                        return 0;
                }
        }

        return -ENOENT;
}
EXPORT_SYMBOL_GPL(mlx4_find_cached_vlan);

int __mlx4_register_vlan(struct mlx4_dev *dev, u8 port, u16 vlan,
                                int *index)
{
        struct mlx4_vlan_table *table = &mlx4_priv(dev)->port[port].vlan_table;
        int i, err = 0;
        int free = -1;
        int free_for_dup = -1;
        bool dup = mlx4_is_mf_bonded(dev);
        u8 dup_port = (port == 1) ? 2 : 1;
        struct mlx4_vlan_table *dup_table = &mlx4_priv(dev)->port[dup_port].vlan_table;
        bool need_mf_bond = mlx4_need_mf_bond(dev);
        bool can_mf_bond = true;

        mlx4_dbg(dev, "Registering VLAN: %d for port %d %s duplicate\n",
                 vlan, port,
                 dup ? "with" : "without");

        if (need_mf_bond) {
                if (port == 1) {
                        mutex_lock(&table->mutex);
                        mutex_lock_nested(&dup_table->mutex, SINGLE_DEPTH_NESTING);
                } else {
                        mutex_lock(&dup_table->mutex);
                        mutex_lock_nested(&table->mutex, SINGLE_DEPTH_NESTING);
                }
        } else {
                mutex_lock(&table->mutex);
        }

        if (table->total == table->max) {
                /* No free vlan entries */
                err = -ENOSPC;
                goto out;
        }

        if (need_mf_bond) {
                int index_at_port = -1;
                int index_at_dup_port = -1;

                for (i = MLX4_VLAN_REGULAR; i < MLX4_MAX_VLAN_NUM; i++) {
                        if (vlan == (MLX4_VLAN_MASK & be32_to_cpu(table->entries[i])))
                                index_at_port = i;
                        if (vlan == (MLX4_VLAN_MASK & be32_to_cpu(dup_table->entries[i])))
                                index_at_dup_port = i;
                }
                /* check that same vlan is not in the tables at different indices */
                if ((index_at_port != index_at_dup_port) &&
                    (index_at_port >= 0) &&
                    (index_at_dup_port >= 0))
                        can_mf_bond = false;

                /* If the vlan is already in the primary table, the slot must be
                 * available in the duplicate table as well.
                 */
                if (index_at_port >= 0 && index_at_dup_port < 0 &&
                    dup_table->refs[index_at_port]) {
                        can_mf_bond = false;
                }
                /* If the vlan is already in the duplicate table, check that the
                 * corresponding index is not occupied in the primary table, or
                 * the primary table already contains the vlan at the same index.
                 * Otherwise, you cannot bond (primary contains a different vlan
                 * at that index).
                 */
                if (index_at_dup_port >= 0) {
                        if (!table->refs[index_at_dup_port] ||
                            (vlan == (MLX4_VLAN_MASK & be32_to_cpu(dup_table->entries[index_at_dup_port]))))
                                free_for_dup = index_at_dup_port;
                        else
                                can_mf_bond = false;
                }
        }

        for (i = MLX4_VLAN_REGULAR; i < MLX4_MAX_VLAN_NUM; i++) {
                if (!table->refs[i]) {
                        if (free < 0)
                                free = i;
                        if (free_for_dup < 0 && need_mf_bond && can_mf_bond) {
                                if (!dup_table->refs[i])
                                        free_for_dup = i;
                        }
                }

                if ((table->refs[i] || table->is_dup[i]) &&
                    (vlan == (MLX4_VLAN_MASK &
                              be32_to_cpu(table->entries[i])))) {
                        /* Vlan already registered, increase references count */
                        mlx4_dbg(dev, "vlan %u is already registered.\n", vlan);
                        *index = i;
                        ++table->refs[i];
                        if (dup) {
                                u16 dup_vlan = MLX4_VLAN_MASK & be32_to_cpu(dup_table->entries[i]);

                                if (dup_vlan != vlan || !dup_table->is_dup[i]) {
                                        mlx4_warn(dev, "register vlan: expected duplicate vlan %u on port %d index %d\n",
                                                  vlan, dup_port, i);
                                }
                        }
                        goto out;
                }
        }

        if (need_mf_bond && (free_for_dup < 0)) {
                if (dup) {
                        mlx4_warn(dev, "Fail to allocate duplicate VLAN table entry\n");
                        mlx4_warn(dev, "High Availability for virtual functions may not work as expected\n");
                        dup = false;
                }
                can_mf_bond = false;
        }

        if (need_mf_bond && can_mf_bond)
                free = free_for_dup;

        if (free < 0) {
                err = -ENOMEM;
                goto out;
        }

        /* Register new VLAN */
        table->refs[free] = 1;
        table->is_dup[free] = false;
        table->entries[free] = cpu_to_be32(vlan | MLX4_VLAN_VALID);

        err = mlx4_set_port_vlan_table(dev, port, table->entries);
        if (unlikely(err)) {
                mlx4_warn(dev, "Failed adding vlan: %u\n", vlan);
                table->refs[free] = 0;
                table->entries[free] = 0;
                goto out;
        }
        ++table->total;
        if (dup) {
                dup_table->refs[free] = 0;
                dup_table->is_dup[free] = true;
                dup_table->entries[free] = cpu_to_be32(vlan | MLX4_VLAN_VALID);

                err = mlx4_set_port_vlan_table(dev, dup_port, dup_table->entries);
                if (unlikely(err)) {
                        mlx4_warn(dev, "Failed adding duplicate vlan: %u\n", vlan);
                        dup_table->is_dup[free] = false;
                        dup_table->entries[free] = 0;
                        goto out;
                }
                ++dup_table->total;
        }

        *index = free;
out:
        if (need_mf_bond) {
                if (port == 2) {
                        mutex_unlock(&table->mutex);
                        mutex_unlock(&dup_table->mutex);
                } else {
                        mutex_unlock(&dup_table->mutex);
                        mutex_unlock(&table->mutex);
                }
        } else {
                mutex_unlock(&table->mutex);
        }
        return err;
}

int mlx4_register_vlan(struct mlx4_dev *dev, u8 port, u16 vlan, int *index)
{
        u64 out_param = 0;
        int err;

        if (vlan > 4095)
                return -EINVAL;

        if (mlx4_is_mfunc(dev)) {
                err = mlx4_cmd_imm(dev, vlan, &out_param,
                                   ((u32) port) << 8 | (u32) RES_VLAN,
                                   RES_OP_RESERVE_AND_MAP, MLX4_CMD_ALLOC_RES,
                                   MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);
                if (!err)
                        *index = get_param_l(&out_param);

                return err;
        }
        return __mlx4_register_vlan(dev, port, vlan, index);
}
EXPORT_SYMBOL_GPL(mlx4_register_vlan);

void __mlx4_unregister_vlan(struct mlx4_dev *dev, u8 port, u16 vlan)
{
        struct mlx4_vlan_table *table = &mlx4_priv(dev)->port[port].vlan_table;
        int index;
        bool dup = mlx4_is_mf_bonded(dev);
        u8 dup_port = (port == 1) ? 2 : 1;
        struct mlx4_vlan_table *dup_table = &mlx4_priv(dev)->port[dup_port].vlan_table;

        if (dup) {
                if (port == 1) {
                        mutex_lock(&table->mutex);
                        mutex_lock_nested(&dup_table->mutex, SINGLE_DEPTH_NESTING);
                } else {
                        mutex_lock(&dup_table->mutex);
                        mutex_lock_nested(&table->mutex, SINGLE_DEPTH_NESTING);
                }
        } else {
                mutex_lock(&table->mutex);
        }

        if (mlx4_find_cached_vlan(dev, port, vlan, &index)) {
                mlx4_warn(dev, "vlan 0x%x is not in the vlan table\n", vlan);
                goto out;
        }

        if (index < MLX4_VLAN_REGULAR) {
                mlx4_warn(dev, "Trying to free special vlan index %d\n", index);
                goto out;
        }

        if (--table->refs[index] || table->is_dup[index]) {
                mlx4_dbg(dev, "Have %d more references for index %d, no need to modify vlan table\n",
                         table->refs[index], index);
                if (!table->refs[index])
                        dup_table->is_dup[index] = false;
                goto out;
        }
        table->entries[index] = 0;
        if (mlx4_set_port_vlan_table(dev, port, table->entries))
                mlx4_warn(dev, "Fail to set vlan in port %d during unregister\n", port);
        --table->total;
        if (dup) {
                dup_table->is_dup[index] = false;
                if (dup_table->refs[index])
                        goto out;
                dup_table->entries[index] = 0;
                if (mlx4_set_port_vlan_table(dev, dup_port, dup_table->entries))
                        mlx4_warn(dev, "Fail to set vlan in duplicate port %d during unregister\n", dup_port);
                --dup_table->total;
        }
out:
        if (dup) {
                if (port == 2) {
                        mutex_unlock(&table->mutex);
                        mutex_unlock(&dup_table->mutex);
                } else {
                        mutex_unlock(&dup_table->mutex);
                        mutex_unlock(&table->mutex);
                }
        } else {
                mutex_unlock(&table->mutex);
        }
}

void mlx4_unregister_vlan(struct mlx4_dev *dev, u8 port, u16 vlan)
{
        u64 out_param = 0;

        if (mlx4_is_mfunc(dev)) {
                (void) mlx4_cmd_imm(dev, vlan, &out_param,
                                    ((u32) port) << 8 | (u32) RES_VLAN,
                                    RES_OP_RESERVE_AND_MAP,
                                    MLX4_CMD_FREE_RES, MLX4_CMD_TIME_CLASS_A,
                                    MLX4_CMD_WRAPPED);
                return;
        }
        __mlx4_unregister_vlan(dev, port, vlan);
}
EXPORT_SYMBOL_GPL(mlx4_unregister_vlan);

int mlx4_bond_mac_table(struct mlx4_dev *dev)
{
        struct mlx4_mac_table *t1 = &mlx4_priv(dev)->port[1].mac_table;
        struct mlx4_mac_table *t2 = &mlx4_priv(dev)->port[2].mac_table;
        int ret = 0;
        int i;
        bool update1 = false;
        bool update2 = false;

        mutex_lock(&t1->mutex);
        mutex_lock(&t2->mutex);
        for (i = 0; i < MLX4_MAX_MAC_NUM; i++) {
                if ((t1->entries[i] != t2->entries[i]) &&
                    t1->entries[i] && t2->entries[i]) {
                        mlx4_warn(dev, "can't duplicate entry %d in mac table\n", i);
                        ret = -EINVAL;
                        goto unlock;
                }
        }

        for (i = 0; i < MLX4_MAX_MAC_NUM; i++) {
                if (t1->entries[i] && !t2->entries[i]) {
                        t2->entries[i] = t1->entries[i];
                        t2->is_dup[i] = true;
                        update2 = true;
                } else if (!t1->entries[i] && t2->entries[i]) {
                        t1->entries[i] = t2->entries[i];
                        t1->is_dup[i] = true;
                        update1 = true;
                } else if (t1->entries[i] && t2->entries[i]) {
                        t1->is_dup[i] = true;
                        t2->is_dup[i] = true;
                }
        }

        if (update1) {
                ret = mlx4_set_port_mac_table(dev, 1, t1->entries);
                if (ret)
                        mlx4_warn(dev, "failed to set MAC table for port 1 (%d)\n", ret);
        }
        if (!ret && update2) {
                ret = mlx4_set_port_mac_table(dev, 2, t2->entries);
                if (ret)
                        mlx4_warn(dev, "failed to set MAC table for port 2 (%d)\n", ret);
        }

        if (ret)
                mlx4_warn(dev, "failed to create mirror MAC tables\n");
unlock:
        mutex_unlock(&t2->mutex);
        mutex_unlock(&t1->mutex);
        return ret;
}

int mlx4_unbond_mac_table(struct mlx4_dev *dev)
{
        struct mlx4_mac_table *t1 = &mlx4_priv(dev)->port[1].mac_table;
        struct mlx4_mac_table *t2 = &mlx4_priv(dev)->port[2].mac_table;
        int ret = 0;
        int ret1;
        int i;
        bool update1 = false;
        bool update2 = false;

        mutex_lock(&t1->mutex);
        mutex_lock(&t2->mutex);
        for (i = 0; i < MLX4_MAX_MAC_NUM; i++) {
                if (t1->entries[i] != t2->entries[i]) {
                        mlx4_warn(dev, "mac table is in an unexpected state when trying to unbond\n");
                        ret = -EINVAL;
                        goto unlock;
                }
        }

        for (i = 0; i < MLX4_MAX_MAC_NUM; i++) {
                if (!t1->entries[i])
                        continue;
                t1->is_dup[i] = false;
                if (!t1->refs[i]) {
                        t1->entries[i] = 0;
                        update1 = true;
                }
                t2->is_dup[i] = false;
                if (!t2->refs[i]) {
                        t2->entries[i] = 0;
                        update2 = true;
                }
        }

        if (update1) {
                ret = mlx4_set_port_mac_table(dev, 1, t1->entries);
                if (ret)
                        mlx4_warn(dev, "failed to unmirror MAC tables for port 1(%d)\n", ret);
        }
        if (update2) {
                ret1 = mlx4_set_port_mac_table(dev, 2, t2->entries);
                if (ret1) {
                        mlx4_warn(dev, "failed to unmirror MAC tables for port 2(%d)\n", ret1);
                        ret = ret1;
                }
        }
unlock:
        mutex_unlock(&t2->mutex);
        mutex_unlock(&t1->mutex);
        return ret;
}

int mlx4_bond_vlan_table(struct mlx4_dev *dev)
{
        struct mlx4_vlan_table *t1 = &mlx4_priv(dev)->port[1].vlan_table;
        struct mlx4_vlan_table *t2 = &mlx4_priv(dev)->port[2].vlan_table;
        int ret = 0;
        int i;
        bool update1 = false;
        bool update2 = false;

        mutex_lock(&t1->mutex);
        mutex_lock(&t2->mutex);
        for (i = 0; i < MLX4_MAX_VLAN_NUM; i++) {
                if ((t1->entries[i] != t2->entries[i]) &&
                    t1->entries[i] && t2->entries[i]) {
                        mlx4_warn(dev, "can't duplicate entry %d in vlan table\n", i);
                        ret = -EINVAL;
                        goto unlock;
                }
        }

        for (i = 0; i < MLX4_MAX_VLAN_NUM; i++) {
                if (t1->entries[i] && !t2->entries[i]) {
                        t2->entries[i] = t1->entries[i];
                        t2->is_dup[i] = true;
                        update2 = true;
                } else if (!t1->entries[i] && t2->entries[i]) {
                        t1->entries[i] = t2->entries[i];
                        t1->is_dup[i] = true;
                        update1 = true;
                } else if (t1->entries[i] && t2->entries[i]) {
                        t1->is_dup[i] = true;
                        t2->is_dup[i] = true;
                }
        }

        if (update1) {
                ret = mlx4_set_port_vlan_table(dev, 1, t1->entries);
                if (ret)
                        mlx4_warn(dev, "failed to set VLAN table for port 1 (%d)\n", ret);
        }
        if (!ret && update2) {
                ret = mlx4_set_port_vlan_table(dev, 2, t2->entries);
                if (ret)
                        mlx4_warn(dev, "failed to set VLAN table for port 2 (%d)\n", ret);
        }

        if (ret)
                mlx4_warn(dev, "failed to create mirror VLAN tables\n");
unlock:
        mutex_unlock(&t2->mutex);
        mutex_unlock(&t1->mutex);
        return ret;

}

int mlx4_unbond_vlan_table(struct mlx4_dev *dev)
{
        struct mlx4_vlan_table *t1 = &mlx4_priv(dev)->port[1].vlan_table;
        struct mlx4_vlan_table *t2 = &mlx4_priv(dev)->port[2].vlan_table;
        int ret = 0;
        int ret1;
        int i;
        bool update1 = false;
        bool update2 = false;

        mutex_lock(&t1->mutex);
        mutex_lock(&t2->mutex);
        for (i = 0; i < MLX4_MAX_VLAN_NUM; i++) {
                if (t1->entries[i] != t2->entries[i]) {
                        mlx4_warn(dev, "vlan table is in an unexpected state when trying to unbond\n");
                        ret = -EINVAL;
                        goto unlock;
                }
        }

        for (i = 0; i < MLX4_MAX_VLAN_NUM; i++) {
                if (!t1->entries[i])
                        continue;
                t1->is_dup[i] = false;
                if (!t1->refs[i]) {
                        t1->entries[i] = 0;
                        update1 = true;
                }
                t2->is_dup[i] = false;
                if (!t2->refs[i]) {
                        t2->entries[i] = 0;
                        update2 = true;
                }
        }

        if (update1) {
                ret = mlx4_set_port_vlan_table(dev, 1, t1->entries);
                if (ret)
                        mlx4_warn(dev, "failed to unmirror VLAN tables for port 1(%d)\n", ret);
        }
        if (update2) {
                ret1 = mlx4_set_port_vlan_table(dev, 2, t2->entries);
                if (ret1) {
                        mlx4_warn(dev, "failed to unmirror VLAN tables for port 2(%d)\n", ret1);
                        ret = ret1;
                }
        }
unlock:
        mutex_unlock(&t2->mutex);
        mutex_unlock(&t1->mutex);
        return ret;
}

int mlx4_get_port_ib_caps(struct mlx4_dev *dev, u8 port, __be32 *caps)
{
        struct mlx4_cmd_mailbox *inmailbox, *outmailbox;
        u8 *inbuf, *outbuf;
        int err;

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

        outmailbox = mlx4_alloc_cmd_mailbox(dev);
        if (IS_ERR(outmailbox)) {
                mlx4_free_cmd_mailbox(dev, inmailbox);
                return PTR_ERR(outmailbox);
        }

        inbuf = inmailbox->buf;
        outbuf = outmailbox->buf;
        inbuf[0] = 1;
        inbuf[1] = 1;
        inbuf[2] = 1;
        inbuf[3] = 1;
        *(__be16 *) (&inbuf[16]) = cpu_to_be16(0x0015);
        *(__be32 *) (&inbuf[20]) = cpu_to_be32(port);

        err = mlx4_cmd_box(dev, inmailbox->dma, outmailbox->dma, port, 3,
                           MLX4_CMD_MAD_IFC, MLX4_CMD_TIME_CLASS_C,
                           MLX4_CMD_NATIVE);
        if (!err)
                *caps = *(__be32 *) (outbuf + 84);
        mlx4_free_cmd_mailbox(dev, inmailbox);
        mlx4_free_cmd_mailbox(dev, outmailbox);
        return err;
}
static struct mlx4_roce_gid_entry zgid_entry;

int mlx4_get_slave_num_gids(struct mlx4_dev *dev, int slave, int port)
{
        int vfs;
        int slave_gid = slave;
        unsigned i;
        struct mlx4_slaves_pport slaves_pport;
        struct mlx4_active_ports actv_ports;
        unsigned max_port_p_one;

        if (slave == 0)
                return MLX4_ROCE_PF_GIDS;

        /* Slave is a VF */
        slaves_pport = mlx4_phys_to_slaves_pport(dev, port);
        actv_ports = mlx4_get_active_ports(dev, slave);
        max_port_p_one = find_first_bit(actv_ports.ports, dev->caps.num_ports) +
                bitmap_weight(actv_ports.ports, dev->caps.num_ports) + 1;

        for (i = 1; i < max_port_p_one; i++) {
                struct mlx4_active_ports exclusive_ports;
                struct mlx4_slaves_pport slaves_pport_actv;
                bitmap_zero(exclusive_ports.ports, dev->caps.num_ports);
                set_bit(i - 1, exclusive_ports.ports);
                if (i == port)
                        continue;
                slaves_pport_actv = mlx4_phys_to_slaves_pport_actv(
                                    dev, &exclusive_ports);
                slave_gid -= bitmap_weight(slaves_pport_actv.slaves,
                                           dev->persist->num_vfs + 1);
        }
        vfs = bitmap_weight(slaves_pport.slaves, dev->persist->num_vfs + 1) - 1;
        if (slave_gid <= ((MLX4_ROCE_MAX_GIDS - MLX4_ROCE_PF_GIDS) % vfs))
                return ((MLX4_ROCE_MAX_GIDS - MLX4_ROCE_PF_GIDS) / vfs) + 1;
        return (MLX4_ROCE_MAX_GIDS - MLX4_ROCE_PF_GIDS) / vfs;
}

int mlx4_get_base_gid_ix(struct mlx4_dev *dev, int slave, int port)
{
        int gids;
        unsigned i;
        int slave_gid = slave;
        int vfs;

        struct mlx4_slaves_pport slaves_pport;
        struct mlx4_active_ports actv_ports;
        unsigned max_port_p_one;

        if (slave == 0)
                return 0;

        slaves_pport = mlx4_phys_to_slaves_pport(dev, port);
        actv_ports = mlx4_get_active_ports(dev, slave);
        max_port_p_one = find_first_bit(actv_ports.ports, dev->caps.num_ports) +
                bitmap_weight(actv_ports.ports, dev->caps.num_ports) + 1;

        for (i = 1; i < max_port_p_one; i++) {
                struct mlx4_active_ports exclusive_ports;
                struct mlx4_slaves_pport slaves_pport_actv;
                bitmap_zero(exclusive_ports.ports, dev->caps.num_ports);
                set_bit(i - 1, exclusive_ports.ports);
                if (i == port)
                        continue;
                slaves_pport_actv = mlx4_phys_to_slaves_pport_actv(
                                    dev, &exclusive_ports);
                slave_gid -= bitmap_weight(slaves_pport_actv.slaves,
                                           dev->persist->num_vfs + 1);
        }
        gids = MLX4_ROCE_MAX_GIDS - MLX4_ROCE_PF_GIDS;
        vfs = bitmap_weight(slaves_pport.slaves, dev->persist->num_vfs + 1) - 1;
        if (slave_gid <= gids % vfs)
                return MLX4_ROCE_PF_GIDS + ((gids / vfs) + 1) * (slave_gid - 1);

        return MLX4_ROCE_PF_GIDS + (gids % vfs) +
                ((gids / vfs) * (slave_gid - 1));
}
EXPORT_SYMBOL_GPL(mlx4_get_base_gid_ix);

static int mlx4_reset_roce_port_gids(struct mlx4_dev *dev, int slave,
                                     int port, struct mlx4_cmd_mailbox *mailbox)
{
        struct mlx4_roce_gid_entry *gid_entry_mbox;
        struct mlx4_priv *priv = mlx4_priv(dev);
        int num_gids, base, offset;
        int i, err;

        num_gids = mlx4_get_slave_num_gids(dev, slave, port);
        base = mlx4_get_base_gid_ix(dev, slave, port);

        memset(mailbox->buf, 0, MLX4_MAILBOX_SIZE);

        mutex_lock(&(priv->port[port].gid_table.mutex));
        /* Zero-out gids belonging to that slave in the port GID table */
        for (i = 0, offset = base; i < num_gids; offset++, i++)
                memcpy(priv->port[port].gid_table.roce_gids[offset].raw,
                       zgid_entry.raw, MLX4_ROCE_GID_ENTRY_SIZE);

        /* Now, copy roce port gids table to mailbox for passing to FW */
        gid_entry_mbox = (struct mlx4_roce_gid_entry *)mailbox->buf;
        for (i = 0; i < MLX4_ROCE_MAX_GIDS; gid_entry_mbox++, i++)
                memcpy(gid_entry_mbox->raw,
                       priv->port[port].gid_table.roce_gids[i].raw,
                       MLX4_ROCE_GID_ENTRY_SIZE);

        err = mlx4_cmd(dev, mailbox->dma,
                       ((u32)port) | (MLX4_SET_PORT_GID_TABLE << 8),
                       MLX4_SET_PORT_ETH_OPCODE, MLX4_CMD_SET_PORT,
                       MLX4_CMD_TIME_CLASS_B, MLX4_CMD_NATIVE);
        mutex_unlock(&(priv->port[port].gid_table.mutex));
        return err;
}


void mlx4_reset_roce_gids(struct mlx4_dev *dev, int slave)
{
        struct mlx4_active_ports actv_ports;
        struct mlx4_cmd_mailbox *mailbox;
        int num_eth_ports, err;
        int i;

        if (slave < 0 || slave > dev->persist->num_vfs)
                return;

        actv_ports = mlx4_get_active_ports(dev, slave);

        for (i = 0, num_eth_ports = 0; i < dev->caps.num_ports; i++) {
                if (test_bit(i, actv_ports.ports)) {
                        if (dev->caps.port_type[i + 1] != MLX4_PORT_TYPE_ETH)
                                continue;
                        num_eth_ports++;
                }
        }

        if (!num_eth_ports)
                return;

        /* have ETH ports.  Alloc mailbox for SET_PORT command */
        mailbox = mlx4_alloc_cmd_mailbox(dev);
        if (IS_ERR(mailbox))
                return;

        for (i = 0; i < dev->caps.num_ports; i++) {
                if (test_bit(i, actv_ports.ports)) {
                        if (dev->caps.port_type[i + 1] != MLX4_PORT_TYPE_ETH)
                                continue;
                        err = mlx4_reset_roce_port_gids(dev, slave, i + 1, mailbox);
                        if (err)
                                mlx4_warn(dev, "Could not reset ETH port GID table for slave %d, port %d (%d)\n",
                                          slave, i + 1, err);
                }
        }

        mlx4_free_cmd_mailbox(dev, mailbox);
        return;
}

static void
mlx4_en_set_port_mtu(struct mlx4_dev *dev, int slave, int port,
                     struct mlx4_set_port_general_context *gen_context)
{
        struct mlx4_priv *priv = mlx4_priv(dev);
        struct mlx4_mfunc_master_ctx *master = &priv->mfunc.master;
        struct mlx4_slave_state *slave_st = &master->slave_state[slave];
        u16 mtu, prev_mtu;

        /* Mtu is configured as the max USER_MTU among all
         * the functions on the port.
         */
        mtu = be16_to_cpu(gen_context->mtu);
        mtu = min_t(int, mtu, dev->caps.eth_mtu_cap[port] +
                    ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN);
        prev_mtu = slave_st->mtu[port];
        slave_st->mtu[port] = mtu;
        if (mtu > master->max_mtu[port])
                master->max_mtu[port] = mtu;
        if (mtu < prev_mtu && prev_mtu == master->max_mtu[port]) {
                int i;

                slave_st->mtu[port] = mtu;
                master->max_mtu[port] = mtu;
                for (i = 0; i < dev->num_slaves; i++)
                        master->max_mtu[port] =
                                max_t(u16, master->max_mtu[port],
                                      master->slave_state[i].mtu[port]);
        }
        gen_context->mtu = cpu_to_be16(master->max_mtu[port]);
}

static void
mlx4_en_set_port_user_mtu(struct mlx4_dev *dev, int slave, int port,
                          struct mlx4_set_port_general_context *gen_context)
{
        struct mlx4_priv *priv = mlx4_priv(dev);
        struct mlx4_mfunc_master_ctx *master = &priv->mfunc.master;
        struct mlx4_slave_state *slave_st = &master->slave_state[slave];
        u16 user_mtu, prev_user_mtu;

        /* User Mtu is configured as the max USER_MTU among all
         * the functions on the port.
         */
        user_mtu = be16_to_cpu(gen_context->user_mtu);
        user_mtu = min_t(int, user_mtu, dev->caps.eth_mtu_cap[port]);
        prev_user_mtu = slave_st->user_mtu[port];
        slave_st->user_mtu[port] = user_mtu;
        if (user_mtu > master->max_user_mtu[port])
                master->max_user_mtu[port] = user_mtu;
        if (user_mtu < prev_user_mtu &&
            prev_user_mtu == master->max_user_mtu[port]) {
                int i;

                slave_st->user_mtu[port] = user_mtu;
                master->max_user_mtu[port] = user_mtu;
                for (i = 0; i < dev->num_slaves; i++)
                        master->max_user_mtu[port] =
                                max_t(u16, master->max_user_mtu[port],
                                      master->slave_state[i].user_mtu[port]);
        }
        gen_context->user_mtu = cpu_to_be16(master->max_user_mtu[port]);
}

static void
mlx4_en_set_port_global_pause(struct mlx4_dev *dev, int slave,
                              struct mlx4_set_port_general_context *gen_context)
{
        struct mlx4_priv *priv = mlx4_priv(dev);
        struct mlx4_mfunc_master_ctx *master = &priv->mfunc.master;

        /* Slave cannot change Global Pause configuration */
        if (slave != mlx4_master_func_num(dev) &&
            (gen_context->pptx != master->pptx ||
             gen_context->pprx != master->pprx)) {
                gen_context->pptx = master->pptx;
                gen_context->pprx = master->pprx;
                mlx4_warn(dev, "denying Global Pause change for slave:%d\n",
                          slave);
        } else {
                master->pptx = gen_context->pptx;
                master->pprx = gen_context->pprx;
        }
}

static int mlx4_common_set_port(struct mlx4_dev *dev, int slave, u32 in_mod,
                                u8 op_mod, struct mlx4_cmd_mailbox *inbox)
{
        struct mlx4_priv *priv = mlx4_priv(dev);
        struct mlx4_port_info *port_info;
        struct mlx4_set_port_rqp_calc_context *qpn_context;
        struct mlx4_set_port_general_context *gen_context;
        struct mlx4_roce_gid_entry *gid_entry_tbl, *gid_entry_mbox, *gid_entry_mb1;
        int reset_qkey_viols;
        int port;
        int is_eth;
        int num_gids;
        int base;
        u32 in_modifier;
        u32 promisc;
        int err;
        int i, j;
        int offset;
        __be32 agg_cap_mask;
        __be32 slave_cap_mask;
        __be32 new_cap_mask;

        port = in_mod & 0xff;
        in_modifier = in_mod >> 8;
        is_eth = op_mod;
        port_info = &priv->port[port];

        /* Slaves cannot perform SET_PORT operations,
         * except for changing MTU and USER_MTU.
         */
        if (is_eth) {
                if (slave != dev->caps.function &&
                    in_modifier != MLX4_SET_PORT_GENERAL &&
                    in_modifier != MLX4_SET_PORT_GID_TABLE) {
                        mlx4_warn(dev, "denying SET_PORT for slave:%d\n",
                                        slave);
                        return -EINVAL;
                }
                switch (in_modifier) {
                case MLX4_SET_PORT_RQP_CALC:
                        qpn_context = inbox->buf;
                        qpn_context->base_qpn =
                                cpu_to_be32(port_info->base_qpn);
                        qpn_context->n_mac = 0x7;
                        promisc = be32_to_cpu(qpn_context->promisc) >>
                                SET_PORT_PROMISC_SHIFT;
                        qpn_context->promisc = cpu_to_be32(
                                promisc << SET_PORT_PROMISC_SHIFT |
                                port_info->base_qpn);
                        promisc = be32_to_cpu(qpn_context->mcast) >>
                                SET_PORT_MC_PROMISC_SHIFT;
                        qpn_context->mcast = cpu_to_be32(
                                promisc << SET_PORT_MC_PROMISC_SHIFT |
                                port_info->base_qpn);
                        break;
                case MLX4_SET_PORT_GENERAL:
                        gen_context = inbox->buf;

                        if (gen_context->flags & MLX4_FLAG_V_MTU_MASK)
                                mlx4_en_set_port_mtu(dev, slave, port,
                                                     gen_context);

                        if (gen_context->flags2 & MLX4_FLAG2_V_USER_MTU_MASK)
                                mlx4_en_set_port_user_mtu(dev, slave, port,
                                                          gen_context);

                        if (gen_context->flags &
                            (MLX4_FLAG_V_PPRX_MASK | MLX4_FLAG_V_PPTX_MASK))
                                mlx4_en_set_port_global_pause(dev, slave,
                                                              gen_context);

                        break;
                case MLX4_SET_PORT_GID_TABLE:
                        /* change to MULTIPLE entries: number of guest's gids
                         * need a FOR-loop here over number of gids the guest has.
                         * 1. Check no duplicates in gids passed by slave
                         */
                        num_gids = mlx4_get_slave_num_gids(dev, slave, port);
                        base = mlx4_get_base_gid_ix(dev, slave, port);
                        gid_entry_mbox = (struct mlx4_roce_gid_entry *)(inbox->buf);
                        for (i = 0; i < num_gids; gid_entry_mbox++, i++) {
                                if (!memcmp(gid_entry_mbox->raw, zgid_entry.raw,
                                            sizeof(zgid_entry)))
                                        continue;
                                gid_entry_mb1 = gid_entry_mbox + 1;
                                for (j = i + 1; j < num_gids; gid_entry_mb1++, j++) {
                                        if (!memcmp(gid_entry_mb1->raw,
                                                    zgid_entry.raw, sizeof(zgid_entry)))
                                                continue;
                                        if (!memcmp(gid_entry_mb1->raw, gid_entry_mbox->raw,
                                                    sizeof(gid_entry_mbox->raw))) {
                                                /* found duplicate */
                                                return -EINVAL;
                                        }
                                }
                        }

                        /* 2. Check that do not have duplicates in OTHER
                         *    entries in the port GID table
                         */

                        mutex_lock(&(priv->port[port].gid_table.mutex));
                        for (i = 0; i < MLX4_ROCE_MAX_GIDS; i++) {
                                if (i >= base && i < base + num_gids)
                                        continue; /* don't compare to slave's current gids */
                                gid_entry_tbl = &priv->port[port].gid_table.roce_gids[i];
                                if (!memcmp(gid_entry_tbl->raw, zgid_entry.raw, sizeof(zgid_entry)))
                                        continue;
                                gid_entry_mbox = (struct mlx4_roce_gid_entry *)(inbox->buf);
                                for (j = 0; j < num_gids; gid_entry_mbox++, j++) {
                                        if (!memcmp(gid_entry_mbox->raw, zgid_entry.raw,
                                                    sizeof(zgid_entry)))
                                                continue;
                                        if (!memcmp(gid_entry_mbox->raw, gid_entry_tbl->raw,
                                                    sizeof(gid_entry_tbl->raw))) {
                                                /* found duplicate */
                                                mlx4_warn(dev, "requested gid entry for slave:%d is a duplicate of gid at index %d\n",
                                                          slave, i);
                                                mutex_unlock(&(priv->port[port].gid_table.mutex));
                                                return -EINVAL;
                                        }
                                }
                        }

                        /* insert slave GIDs with memcpy, starting at slave's base index */
                        gid_entry_mbox = (struct mlx4_roce_gid_entry *)(inbox->buf);
                        for (i = 0, offset = base; i < num_gids; gid_entry_mbox++, offset++, i++)
                                memcpy(priv->port[port].gid_table.roce_gids[offset].raw,
                                       gid_entry_mbox->raw, MLX4_ROCE_GID_ENTRY_SIZE);

                        /* Now, copy roce port gids table to current mailbox for passing to FW */
                        gid_entry_mbox = (struct mlx4_roce_gid_entry *)(inbox->buf);
                        for (i = 0; i < MLX4_ROCE_MAX_GIDS; gid_entry_mbox++, i++)
                                memcpy(gid_entry_mbox->raw,
                                       priv->port[port].gid_table.roce_gids[i].raw,
                                       MLX4_ROCE_GID_ENTRY_SIZE);

                        err = mlx4_cmd(dev, inbox->dma, in_mod & 0xffff, op_mod,
                                       MLX4_CMD_SET_PORT, MLX4_CMD_TIME_CLASS_B,
                                       MLX4_CMD_NATIVE);
                        mutex_unlock(&(priv->port[port].gid_table.mutex));
                        return err;
                }

                return mlx4_cmd(dev, inbox->dma, in_mod & 0xffff, op_mod,
                                MLX4_CMD_SET_PORT, MLX4_CMD_TIME_CLASS_B,
                                MLX4_CMD_NATIVE);
        }

        /* Slaves are not allowed to SET_PORT beacon (LED) blink */
        if (op_mod == MLX4_SET_PORT_BEACON_OPCODE) {
                mlx4_warn(dev, "denying SET_PORT Beacon slave:%d\n", slave);
                return -EPERM;
        }

        /* For IB, we only consider:
         * - The capability mask, which is set to the aggregate of all
         *   slave function capabilities
         * - The QKey violatin counter - reset according to each request.
         */

        if (dev->flags & MLX4_FLAG_OLD_PORT_CMDS) {
                reset_qkey_viols = (*(u8 *) inbox->buf) & 0x40;
                new_cap_mask = ((__be32 *) inbox->buf)[2];
        } else {
                reset_qkey_viols = ((u8 *) inbox->buf)[3] & 0x1;
                new_cap_mask = ((__be32 *) inbox->buf)[1];
        }

        /* slave may not set the IS_SM capability for the port */
        if (slave != mlx4_master_func_num(dev) &&
            (be32_to_cpu(new_cap_mask) & MLX4_PORT_CAP_IS_SM))
                return -EINVAL;

        /* No DEV_MGMT in multifunc mode */
        if (mlx4_is_mfunc(dev) &&
            (be32_to_cpu(new_cap_mask) & MLX4_PORT_CAP_DEV_MGMT_SUP))
                return -EINVAL;

        agg_cap_mask = 0;
        slave_cap_mask =
                priv->mfunc.master.slave_state[slave].ib_cap_mask[port];
        priv->mfunc.master.slave_state[slave].ib_cap_mask[port] = new_cap_mask;
        for (i = 0; i < dev->num_slaves; i++)
                agg_cap_mask |=
                        priv->mfunc.master.slave_state[i].ib_cap_mask[port];

        /* only clear mailbox for guests.  Master may be setting
        * MTU or PKEY table size
        */
        if (slave != dev->caps.function)
                memset(inbox->buf, 0, 256);
        if (dev->flags & MLX4_FLAG_OLD_PORT_CMDS) {
                *(u8 *) inbox->buf         |= !!reset_qkey_viols << 6;
                ((__be32 *) inbox->buf)[2] = agg_cap_mask;
        } else {
                ((u8 *) inbox->buf)[3]     |= !!reset_qkey_viols;
                ((__be32 *) inbox->buf)[1] = agg_cap_mask;
        }

        err = mlx4_cmd(dev, inbox->dma, port, is_eth, MLX4_CMD_SET_PORT,
                       MLX4_CMD_TIME_CLASS_B, MLX4_CMD_NATIVE);
        if (err)
                priv->mfunc.master.slave_state[slave].ib_cap_mask[port] =
                        slave_cap_mask;
        return err;
}

int mlx4_SET_PORT_wrapper(struct mlx4_dev *dev, int slave,
                          struct mlx4_vhcr *vhcr,
                          struct mlx4_cmd_mailbox *inbox,
                          struct mlx4_cmd_mailbox *outbox,
                          struct mlx4_cmd_info *cmd)
{
        int port = mlx4_slave_convert_port(
                        dev, slave, vhcr->in_modifier & 0xFF);

        if (port < 0)
                return -EINVAL;

        vhcr->in_modifier = (vhcr->in_modifier & ~0xFF) |
                            (port & 0xFF);

        return mlx4_common_set_port(dev, slave, vhcr->in_modifier,
                                    vhcr->op_modifier, inbox);
}

/* bit locations for set port command with zero op modifier */
enum {
        MLX4_SET_PORT_VL_CAP     = 4, /* bits 7:4 */
        MLX4_SET_PORT_MTU_CAP    = 12, /* bits 15:12 */
        MLX4_CHANGE_PORT_PKEY_TBL_SZ = 20,
        MLX4_CHANGE_PORT_VL_CAP  = 21,
        MLX4_CHANGE_PORT_MTU_CAP = 22,
};

int mlx4_SET_PORT(struct mlx4_dev *dev, u8 port, int pkey_tbl_sz)
{
        struct mlx4_cmd_mailbox *mailbox;
        int err, vl_cap, pkey_tbl_flag = 0;

        if (dev->caps.port_type[port] == MLX4_PORT_TYPE_ETH)
                return 0;

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

        ((__be32 *) mailbox->buf)[1] = dev->caps.ib_port_def_cap[port];

        if (pkey_tbl_sz >= 0 && mlx4_is_master(dev)) {
                pkey_tbl_flag = 1;
                ((__be16 *) mailbox->buf)[20] = cpu_to_be16(pkey_tbl_sz);
        }

        /* IB VL CAP enum isn't used by the firmware, just numerical values */
        for (vl_cap = 8; vl_cap >= 1; vl_cap >>= 1) {
                ((__be32 *) mailbox->buf)[0] = cpu_to_be32(
                        (1 << MLX4_CHANGE_PORT_MTU_CAP) |
                        (1 << MLX4_CHANGE_PORT_VL_CAP)  |
                        (pkey_tbl_flag << MLX4_CHANGE_PORT_PKEY_TBL_SZ) |
                        (dev->caps.port_ib_mtu[port] << MLX4_SET_PORT_MTU_CAP) |
                        (vl_cap << MLX4_SET_PORT_VL_CAP));
                err = mlx4_cmd(dev, mailbox->dma, port,
                               MLX4_SET_PORT_IB_OPCODE, MLX4_CMD_SET_PORT,
                               MLX4_CMD_TIME_CLASS_B, MLX4_CMD_WRAPPED);
                if (err != -ENOMEM)
                        break;
        }

        mlx4_free_cmd_mailbox(dev, mailbox);
        return err;
}

#define SET_PORT_ROCE_2_FLAGS          0x10
#define MLX4_SET_PORT_ROCE_V1_V2       0x2
int mlx4_SET_PORT_general(struct mlx4_dev *dev, u8 port, int mtu,
                          u8 pptx, u8 pfctx, u8 pprx, u8 pfcrx)
{
        struct mlx4_cmd_mailbox *mailbox;
        struct mlx4_set_port_general_context *context;
        int err;
        u32 in_mod;

        mailbox = mlx4_alloc_cmd_mailbox(dev);
        if (IS_ERR(mailbox))
                return PTR_ERR(mailbox);
        context = mailbox->buf;
        context->flags = SET_PORT_GEN_ALL_VALID;
        context->mtu = cpu_to_be16(mtu);
        context->pptx = (pptx * (!pfctx)) << 7;
        context->pfctx = pfctx;
        context->pprx = (pprx * (!pfcrx)) << 7;
        context->pfcrx = pfcrx;

        if (dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_ROCE_V1_V2) {
                context->flags |= SET_PORT_ROCE_2_FLAGS;
                context->roce_mode |=
                        MLX4_SET_PORT_ROCE_V1_V2 << 4;
        }
        in_mod = MLX4_SET_PORT_GENERAL << 8 | port;
        err = mlx4_cmd(dev, mailbox->dma, in_mod, MLX4_SET_PORT_ETH_OPCODE,
                       MLX4_CMD_SET_PORT, MLX4_CMD_TIME_CLASS_B,
                       MLX4_CMD_WRAPPED);

        mlx4_free_cmd_mailbox(dev, mailbox);
        return err;
}
EXPORT_SYMBOL(mlx4_SET_PORT_general);

int mlx4_SET_PORT_qpn_calc(struct mlx4_dev *dev, u8 port, u32 base_qpn,
                           u8 promisc)
{
        struct mlx4_cmd_mailbox *mailbox;
        struct mlx4_set_port_rqp_calc_context *context;
        int err;
        u32 in_mod;
        u32 m_promisc = (dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_MC_STEER) ?
                MCAST_DIRECT : MCAST_DEFAULT;

        if (dev->caps.steering_mode != MLX4_STEERING_MODE_A0)
                return 0;

        mailbox = mlx4_alloc_cmd_mailbox(dev);
        if (IS_ERR(mailbox))
                return PTR_ERR(mailbox);
        context = mailbox->buf;
        context->base_qpn = cpu_to_be32(base_qpn);
        context->n_mac = dev->caps.log_num_macs;
        context->promisc = cpu_to_be32(promisc << SET_PORT_PROMISC_SHIFT |
                                       base_qpn);
        context->mcast = cpu_to_be32(m_promisc << SET_PORT_MC_PROMISC_SHIFT |
                                     base_qpn);
        context->intra_no_vlan = 0;
        context->no_vlan = MLX4_NO_VLAN_IDX;
        context->intra_vlan_miss = 0;
        context->vlan_miss = MLX4_VLAN_MISS_IDX;

        in_mod = MLX4_SET_PORT_RQP_CALC << 8 | port;
        err = mlx4_cmd(dev, mailbox->dma, in_mod, MLX4_SET_PORT_ETH_OPCODE,
                       MLX4_CMD_SET_PORT, MLX4_CMD_TIME_CLASS_B,
                       MLX4_CMD_WRAPPED);

        mlx4_free_cmd_mailbox(dev, mailbox);
        return err;
}
EXPORT_SYMBOL(mlx4_SET_PORT_qpn_calc);

int mlx4_SET_PORT_user_mtu(struct mlx4_dev *dev, u8 port, u16 user_mtu)
{
        struct mlx4_cmd_mailbox *mailbox;
        struct mlx4_set_port_general_context *context;
        u32 in_mod;
        int err;

        mailbox = mlx4_alloc_cmd_mailbox(dev);
        if (IS_ERR(mailbox))
                return PTR_ERR(mailbox);
        context = mailbox->buf;
        context->flags2 |= MLX4_FLAG2_V_USER_MTU_MASK;
        context->user_mtu = cpu_to_be16(user_mtu);

        in_mod = MLX4_SET_PORT_GENERAL << 8 | port;
        err = mlx4_cmd(dev, mailbox->dma, in_mod, MLX4_SET_PORT_ETH_OPCODE,
                       MLX4_CMD_SET_PORT, MLX4_CMD_TIME_CLASS_B,
                       MLX4_CMD_WRAPPED);

        mlx4_free_cmd_mailbox(dev, mailbox);
        return err;
}
EXPORT_SYMBOL(mlx4_SET_PORT_user_mtu);

int mlx4_SET_PORT_user_mac(struct mlx4_dev *dev, u8 port, u8 *user_mac)
{
        struct mlx4_cmd_mailbox *mailbox;
        struct mlx4_set_port_general_context *context;
        u32 in_mod;
        int err;

        mailbox = mlx4_alloc_cmd_mailbox(dev);
        if (IS_ERR(mailbox))
                return PTR_ERR(mailbox);
        context = mailbox->buf;
        context->flags2 |= MLX4_FLAG2_V_USER_MAC_MASK;
        memcpy(context->user_mac, user_mac, sizeof(context->user_mac));

        in_mod = MLX4_SET_PORT_GENERAL << 8 | port;
        err = mlx4_cmd(dev, mailbox->dma, in_mod, MLX4_SET_PORT_ETH_OPCODE,
                       MLX4_CMD_SET_PORT, MLX4_CMD_TIME_CLASS_B,
                       MLX4_CMD_NATIVE);

        mlx4_free_cmd_mailbox(dev, mailbox);
        return err;
}
EXPORT_SYMBOL(mlx4_SET_PORT_user_mac);

int mlx4_SET_PORT_fcs_check(struct mlx4_dev *dev, u8 port, u8 ignore_fcs_value)
{
        struct mlx4_cmd_mailbox *mailbox;
        struct mlx4_set_port_general_context *context;
        u32 in_mod;
        int err;

        mailbox = mlx4_alloc_cmd_mailbox(dev);
        if (IS_ERR(mailbox))
                return PTR_ERR(mailbox);
        context = mailbox->buf;
        context->flags2 |= MLX4_FLAG2_V_IGNORE_FCS_MASK;
        if (ignore_fcs_value)
                context->ignore_fcs |= MLX4_IGNORE_FCS_MASK;
        else
                context->ignore_fcs &= ~MLX4_IGNORE_FCS_MASK;

        in_mod = MLX4_SET_PORT_GENERAL << 8 | port;
        err = mlx4_cmd(dev, mailbox->dma, in_mod, 1, MLX4_CMD_SET_PORT,
                       MLX4_CMD_TIME_CLASS_B, MLX4_CMD_NATIVE);

        mlx4_free_cmd_mailbox(dev, mailbox);
        return err;
}
EXPORT_SYMBOL(mlx4_SET_PORT_fcs_check);

enum {
        VXLAN_ENABLE_MODIFY     = 1 << 7,
        VXLAN_STEERING_MODIFY   = 1 << 6,

        VXLAN_ENABLE            = 1 << 7,
};

struct mlx4_set_port_vxlan_context {
        u32     reserved1;
        u8      modify_flags;
        u8      reserved2;
        u8      enable_flags;
        u8      steering;
};

int mlx4_SET_PORT_VXLAN(struct mlx4_dev *dev, u8 port, u8 steering, int enable)
{
        int err;
        u32 in_mod;
        struct mlx4_cmd_mailbox *mailbox;
        struct mlx4_set_port_vxlan_context  *context;

        mailbox = mlx4_alloc_cmd_mailbox(dev);
        if (IS_ERR(mailbox))
                return PTR_ERR(mailbox);
        context = mailbox->buf;
        memset(context, 0, sizeof(*context));

        context->modify_flags = VXLAN_ENABLE_MODIFY | VXLAN_STEERING_MODIFY;
        if (enable)
                context->enable_flags = VXLAN_ENABLE;
        context->steering  = steering;

        in_mod = MLX4_SET_PORT_VXLAN << 8 | port;
        err = mlx4_cmd(dev, mailbox->dma, in_mod, MLX4_SET_PORT_ETH_OPCODE,
                       MLX4_CMD_SET_PORT, MLX4_CMD_TIME_CLASS_B,
                       MLX4_CMD_NATIVE);

        mlx4_free_cmd_mailbox(dev, mailbox);
        return err;
}
EXPORT_SYMBOL(mlx4_SET_PORT_VXLAN);

int mlx4_SET_PORT_BEACON(struct mlx4_dev *dev, u8 port, u16 time)
{
        int err;
        struct mlx4_cmd_mailbox *mailbox;

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

        *((__be32 *)mailbox->buf) = cpu_to_be32(time);

        err = mlx4_cmd(dev, mailbox->dma, port, MLX4_SET_PORT_BEACON_OPCODE,
                       MLX4_CMD_SET_PORT, MLX4_CMD_TIME_CLASS_B,
                       MLX4_CMD_NATIVE);

        mlx4_free_cmd_mailbox(dev, mailbox);
        return err;
}
EXPORT_SYMBOL(mlx4_SET_PORT_BEACON);

int mlx4_SET_MCAST_FLTR_wrapper(struct mlx4_dev *dev, int slave,
                                struct mlx4_vhcr *vhcr,
                                struct mlx4_cmd_mailbox *inbox,
                                struct mlx4_cmd_mailbox *outbox,
                                struct mlx4_cmd_info *cmd)
{
        int err = 0;

        return err;
}

int mlx4_SET_MCAST_FLTR(struct mlx4_dev *dev, u8 port,
                        u64 mac, u64 clear, u8 mode)
{
        return mlx4_cmd(dev, (mac | (clear << 63)), port, mode,
                        MLX4_CMD_SET_MCAST_FLTR, MLX4_CMD_TIME_CLASS_B,
                        MLX4_CMD_WRAPPED);
}
EXPORT_SYMBOL(mlx4_SET_MCAST_FLTR);

int mlx4_SET_VLAN_FLTR_wrapper(struct mlx4_dev *dev, int slave,
                               struct mlx4_vhcr *vhcr,
                               struct mlx4_cmd_mailbox *inbox,
                               struct mlx4_cmd_mailbox *outbox,
                               struct mlx4_cmd_info *cmd)
{
        int err = 0;

        return err;
}

int mlx4_DUMP_ETH_STATS_wrapper(struct mlx4_dev *dev, int slave,
                                struct mlx4_vhcr *vhcr,
                                struct mlx4_cmd_mailbox *inbox,
                                struct mlx4_cmd_mailbox *outbox,
                                struct mlx4_cmd_info *cmd)
{
        return 0;
}

int mlx4_get_slave_from_roce_gid(struct mlx4_dev *dev, int port, u8 *gid,
                                 int *slave_id)
{
        struct mlx4_priv *priv = mlx4_priv(dev);
        int i, found_ix = -1;
        int vf_gids = MLX4_ROCE_MAX_GIDS - MLX4_ROCE_PF_GIDS;
        struct mlx4_slaves_pport slaves_pport;
        unsigned num_vfs;
        int slave_gid;

        if (!mlx4_is_mfunc(dev))
                return -EINVAL;

        slaves_pport = mlx4_phys_to_slaves_pport(dev, port);
        num_vfs = bitmap_weight(slaves_pport.slaves,
                                dev->persist->num_vfs + 1) - 1;

        for (i = 0; i < MLX4_ROCE_MAX_GIDS; i++) {
                if (!memcmp(priv->port[port].gid_table.roce_gids[i].raw, gid,
                            MLX4_ROCE_GID_ENTRY_SIZE)) {
                        found_ix = i;
                        break;
                }
        }

        if (found_ix >= 0) {
                /* Calculate a slave_gid which is the slave number in the gid
                 * table and not a globally unique slave number.
                 */
                if (found_ix < MLX4_ROCE_PF_GIDS)
                        slave_gid = 0;
                else if (found_ix < MLX4_ROCE_PF_GIDS + (vf_gids % num_vfs) *
                         (vf_gids / num_vfs + 1))
                        slave_gid = ((found_ix - MLX4_ROCE_PF_GIDS) /
                                     (vf_gids / num_vfs + 1)) + 1;
                else
                        slave_gid =
                        ((found_ix - MLX4_ROCE_PF_GIDS -
                          ((vf_gids % num_vfs) * ((vf_gids / num_vfs + 1)))) /
                         (vf_gids / num_vfs)) + vf_gids % num_vfs + 1;

                /* Calculate the globally unique slave id */
                if (slave_gid) {
                        struct mlx4_active_ports exclusive_ports;
                        struct mlx4_active_ports actv_ports;
                        struct mlx4_slaves_pport slaves_pport_actv;
                        unsigned max_port_p_one;
                        int num_vfs_before = 0;
                        int candidate_slave_gid;

                        /* Calculate how many VFs are on the previous port, if exists */
                        for (i = 1; i < port; i++) {
                                bitmap_zero(exclusive_ports.ports, dev->caps.num_ports);
                                set_bit(i - 1, exclusive_ports.ports);
                                slaves_pport_actv =
                                        mlx4_phys_to_slaves_pport_actv(
                                                        dev, &exclusive_ports);
                                num_vfs_before += bitmap_weight(
                                                slaves_pport_actv.slaves,
                                                dev->persist->num_vfs + 1);
                        }

                        /* candidate_slave_gid isn't necessarily the correct slave, but
                         * it has the same number of ports and is assigned to the same
                         * ports as the real slave we're looking for. On dual port VF,
                         * slave_gid = [single port VFs on port <port>] +
                         * [offset of the current slave from the first dual port VF] +
                         * 1 (for the PF).
                         */
                        candidate_slave_gid = slave_gid + num_vfs_before;

                        actv_ports = mlx4_get_active_ports(dev, candidate_slave_gid);
                        max_port_p_one = find_first_bit(
                                actv_ports.ports, dev->caps.num_ports) +
                                bitmap_weight(actv_ports.ports,
                                              dev->caps.num_ports) + 1;

                        /* Calculate the real slave number */
                        for (i = 1; i < max_port_p_one; i++) {
                                if (i == port)
                                        continue;
                                bitmap_zero(exclusive_ports.ports,
                                            dev->caps.num_ports);
                                set_bit(i - 1, exclusive_ports.ports);
                                slaves_pport_actv =
                                        mlx4_phys_to_slaves_pport_actv(
                                                dev, &exclusive_ports);
                                slave_gid += bitmap_weight(
                                                slaves_pport_actv.slaves,
                                                dev->persist->num_vfs + 1);
                        }
                }
                *slave_id = slave_gid;
        }

        return (found_ix >= 0) ? 0 : -EINVAL;
}
EXPORT_SYMBOL(mlx4_get_slave_from_roce_gid);

int mlx4_get_roce_gid_from_slave(struct mlx4_dev *dev, int port, int slave_id,
                                 u8 *gid)
{
        struct mlx4_priv *priv = mlx4_priv(dev);

        if (!mlx4_is_master(dev))
                return -EINVAL;

        memcpy(gid, priv->port[port].gid_table.roce_gids[slave_id].raw,
               MLX4_ROCE_GID_ENTRY_SIZE);
        return 0;
}
EXPORT_SYMBOL(mlx4_get_roce_gid_from_slave);

/* Cable Module Info */
#define MODULE_INFO_MAX_READ 48

#define I2C_ADDR_LOW  0x50
#define I2C_ADDR_HIGH 0x51
#define I2C_PAGE_SIZE 256

/* Module Info Data */
struct mlx4_cable_info {
        u8      i2c_addr;
        u8      page_num;
        __be16  dev_mem_address;
        __be16  reserved1;
        __be16  size;
        __be32  reserved2[2];
        u8      data[MODULE_INFO_MAX_READ];
};

enum cable_info_err {
         CABLE_INF_INV_PORT      = 0x1,
         CABLE_INF_OP_NOSUP      = 0x2,
         CABLE_INF_NOT_CONN      = 0x3,
         CABLE_INF_NO_EEPRM      = 0x4,
         CABLE_INF_PAGE_ERR      = 0x5,
         CABLE_INF_INV_ADDR      = 0x6,
         CABLE_INF_I2C_ADDR      = 0x7,
         CABLE_INF_QSFP_VIO      = 0x8,
         CABLE_INF_I2C_BUSY      = 0x9,
};

#define MAD_STATUS_2_CABLE_ERR(mad_status) ((mad_status >> 8) & 0xFF)

static inline const char *cable_info_mad_err_str(u16 mad_status)
{
        u8 err = MAD_STATUS_2_CABLE_ERR(mad_status);

        switch (err) {
        case CABLE_INF_INV_PORT:
                return "invalid port selected";
        case CABLE_INF_OP_NOSUP:
                return "operation not supported for this port (the port is of type CX4 or internal)";
        case CABLE_INF_NOT_CONN:
                return "cable is not connected";
        case CABLE_INF_NO_EEPRM:
                return "the connected cable has no EPROM (passive copper cable)";
        case CABLE_INF_PAGE_ERR:
                return "page number is greater than 15";
        case CABLE_INF_INV_ADDR:
                return "invalid device_address or size (that is, size equals 0 or address+size is greater than 256)";
        case CABLE_INF_I2C_ADDR:
                return "invalid I2C slave address";
        case CABLE_INF_QSFP_VIO:
                return "at least one cable violates the QSFP specification and ignores the modsel signal";
        case CABLE_INF_I2C_BUSY:
                return "I2C bus is constantly busy";
        }
        return "Unknown Error";
}

/**
 * mlx4_get_module_info - Read cable module eeprom data
 * @dev: mlx4_dev.
 * @port: port number.
 * @offset: byte offset in eeprom to start reading data from.
 * @size: num of bytes to read.
 * @data: output buffer to put the requested data into.
 *
 * Reads cable module eeprom data, puts the outcome data into
 * data pointer paramer.
 * Returns num of read bytes on success or a negative error
 * code.
 */
int mlx4_get_module_info(struct mlx4_dev *dev, u8 port,
                         u16 offset, u16 size, u8 *data)
{
        struct mlx4_cmd_mailbox *inbox, *outbox;
        struct mlx4_mad_ifc *inmad, *outmad;
        struct mlx4_cable_info *cable_info;
        u16 i2c_addr;
        int ret;

        if (size > MODULE_INFO_MAX_READ)
                size = MODULE_INFO_MAX_READ;

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

        outbox = mlx4_alloc_cmd_mailbox(dev);
        if (IS_ERR(outbox)) {
                mlx4_free_cmd_mailbox(dev, inbox);
                return PTR_ERR(outbox);
        }

        inmad = (struct mlx4_mad_ifc *)(inbox->buf);
        outmad = (struct mlx4_mad_ifc *)(outbox->buf);

        inmad->method = 0x1; /* Get */
        inmad->class_version = 0x1;
        inmad->mgmt_class = 0x1;
        inmad->base_version = 0x1;
        inmad->attr_id = cpu_to_be16(0xFF60); /* Module Info */

        if (offset < I2C_PAGE_SIZE && offset + size > I2C_PAGE_SIZE)
                /* Cross pages reads are not allowed
                 * read until offset 256 in low page
                 */
                size -= offset + size - I2C_PAGE_SIZE;

        i2c_addr = I2C_ADDR_LOW;

        cable_info = (struct mlx4_cable_info *)inmad->data;
        cable_info->dev_mem_address = cpu_to_be16(offset);
        cable_info->page_num = 0;
        cable_info->i2c_addr = i2c_addr;
        cable_info->size = cpu_to_be16(size);

        ret = mlx4_cmd_box(dev, inbox->dma, outbox->dma, port, 3,
                           MLX4_CMD_MAD_IFC, MLX4_CMD_TIME_CLASS_C,
                           MLX4_CMD_NATIVE);
        if (ret)
                goto out;

        if (be16_to_cpu(outmad->status)) {
                /* Mad returned with bad status */
                ret = be16_to_cpu(outmad->status);
                mlx4_warn(dev,
                          "MLX4_CMD_MAD_IFC Get Module info attr(%x) port(%d) i2c_addr(%x) offset(%d) size(%d): Response Mad Status(%x) - %s\n",
                          0xFF60, port, i2c_addr, offset, size,
                          ret, cable_info_mad_err_str(ret));

                if (i2c_addr == I2C_ADDR_HIGH &&
                    MAD_STATUS_2_CABLE_ERR(ret) == CABLE_INF_I2C_ADDR)
                        /* Some SFP cables do not support i2c slave
                         * address 0x51 (high page), abort silently.
                         */
                        ret = 0;
                else
                        ret = -ret;
                goto out;
        }
        cable_info = (struct mlx4_cable_info *)outmad->data;
        memcpy(data, cable_info->data, size);
        ret = size;
out:
        mlx4_free_cmd_mailbox(dev, inbox);
        mlx4_free_cmd_mailbox(dev, outbox);
        return ret;
}
EXPORT_SYMBOL(mlx4_get_module_info);

int mlx4_max_tc(struct mlx4_dev *dev)
{
        u8 num_tc = dev->caps.max_tc_eth;

        if (!num_tc)
                num_tc = MLX4_TC_MAX_NUMBER;

        return num_tc;
}
EXPORT_SYMBOL(mlx4_max_tc);