drivers/net/mlx4/port.c - kernel/msm - Gitiles

 /*
  * 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/mlx4/cmd.h>

 #include "mlx4.h"

 #define MLX4_MAC_VALID		(1ull << 63)
 #define MLX4_MAC_MASK		0xffffffffffffULL

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

 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->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->max   = 1 << dev->caps.log_num_vlans;
 	table->total = 0;
 }

 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, 1, MLX4_CMD_SET_PORT,
 		       MLX4_CMD_TIME_CLASS_B);

 	mlx4_free_cmd_mailbox(dev, mailbox);
 	return err;
 }

 static int mlx4_uc_steer_add(struct mlx4_dev *dev, u8 port,
 			     u64 mac, int *qpn, u8 reserve)
 {
 	struct mlx4_qp qp;
 	u8 gid[16] = {0};
 	int err;

 	if (reserve) {
 		err = mlx4_qp_reserve_range(dev, 1, 1, qpn);
 		if (err) {
 			mlx4_err(dev, "Failed to reserve qp for mac registration\n");
 			return err;
 		}
 	}
 	qp.qpn = *qpn;

 	mac &= 0xffffffffffffULL;
 	mac = cpu_to_be64(mac << 16);
 	memcpy(&gid[10], &mac, ETH_ALEN);
 	gid[5] = port;
 	gid[7] = MLX4_UC_STEER << 1;

 	err = mlx4_qp_attach_common(dev, &qp, gid, 0,
 				    MLX4_PROT_ETH, MLX4_UC_STEER);
 	if (err && reserve)
 		mlx4_qp_release_range(dev, *qpn, 1);

 	return err;
 }

 static void mlx4_uc_steer_release(struct mlx4_dev *dev, u8 port,
 				  u64 mac, int qpn, u8 free)
 {
 	struct mlx4_qp qp;
 	u8 gid[16] = {0};

 	qp.qpn = qpn;
 	mac &= 0xffffffffffffULL;
 	mac = cpu_to_be64(mac << 16);
 	memcpy(&gid[10], &mac, ETH_ALEN);
 	gid[5] = port;
 	gid[7] = MLX4_UC_STEER << 1;

 	mlx4_qp_detach_common(dev, &qp, gid, MLX4_PROT_ETH, MLX4_UC_STEER);
 	if (free)
 		mlx4_qp_release_range(dev, qpn, 1);
 }

 int mlx4_register_mac(struct mlx4_dev *dev, u8 port, u64 mac, int *qpn, u8 wrap)
 {
 	struct mlx4_port_info *info = &mlx4_priv(dev)->port[port];
 	struct mlx4_mac_table *table = &info->mac_table;
 	struct mlx4_mac_entry *entry;
 	int i, err = 0;
 	int free = -1;

 	if (dev->caps.vep_uc_steering) {
 		err = mlx4_uc_steer_add(dev, port, mac, qpn, 1);
 		if (!err) {
 			entry = kmalloc(sizeof *entry, GFP_KERNEL);
 			if (!entry) {
 				mlx4_uc_steer_release(dev, port, mac, *qpn, 1);
 				return -ENOMEM;
 			}
 			entry->mac = mac;
 			err = radix_tree_insert(&info->mac_tree, *qpn, entry);
 			if (err) {
 				mlx4_uc_steer_release(dev, port, mac, *qpn, 1);
 				return err;
 			}
 		} else
 			return err;
 	}
 	mlx4_dbg(dev, "Registering MAC: 0x%llx\n", (unsigned long long) mac);
 	mutex_lock(&table->mutex);
 	for (i = 0; i < MLX4_MAX_MAC_NUM - 1; i++) {
 		if (free < 0 && !table->refs[i]) {
 			free = i;
 			continue;
 		}

 		if (mac == (MLX4_MAC_MASK & be64_to_cpu(table->entries[i]))) {
 			/* MAC already registered, increase references count */
 			++table->refs[i];
 			goto out;
 		}
 	}

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

 	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->refs[free] = 1;
 	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->refs[free] = 0;
 		table->entries[free] = 0;
 		goto out;
 	}

 	if (!dev->caps.vep_uc_steering)
 		*qpn = info->base_qpn + free;
 	++table->total;
 out:
 	mutex_unlock(&table->mutex);
 	return err;
 }
 EXPORT_SYMBOL_GPL(mlx4_register_mac);

 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 (mac == (MLX4_MAC_MASK & be64_to_cpu(table->entries[i])))
 			return i;
 	}
 	/* Mac not found */
 	return -EINVAL;
 }

 void mlx4_unregister_mac(struct mlx4_dev *dev, u8 port, int qpn)
 {
 	struct mlx4_port_info *info = &mlx4_priv(dev)->port[port];
 	struct mlx4_mac_table *table = &info->mac_table;
 	int index = qpn - info->base_qpn;
 	struct mlx4_mac_entry *entry;

 	if (dev->caps.vep_uc_steering) {
 		entry = radix_tree_lookup(&info->mac_tree, qpn);
 		if (entry) {
 			mlx4_uc_steer_release(dev, port, entry->mac, qpn, 1);
 			radix_tree_delete(&info->mac_tree, qpn);
 			index = find_index(dev, table, entry->mac);
 			kfree(entry);
 		}
 	}

 	mutex_lock(&table->mutex);

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

 	table->entries[index] = 0;
 	mlx4_set_port_mac_table(dev, port, table->entries);
 	--table->total;
 out:
 	mutex_unlock(&table->mutex);
 }
 EXPORT_SYMBOL_GPL(mlx4_unregister_mac);

 int mlx4_replace_mac(struct mlx4_dev *dev, u8 port, int qpn, u64 new_mac, u8 wrap)
 {
 	struct mlx4_port_info *info = &mlx4_priv(dev)->port[port];
 	struct mlx4_mac_table *table = &info->mac_table;
 	int index = qpn - info->base_qpn;
 	struct mlx4_mac_entry *entry;
 	int err;

 	if (dev->caps.vep_uc_steering) {
 		entry = radix_tree_lookup(&info->mac_tree, qpn);
 		if (!entry)
 			return -EINVAL;
 		index = find_index(dev, table, entry->mac);
 		mlx4_uc_steer_release(dev, port, entry->mac, qpn, 0);
 		entry->mac = new_mac;
 		err = mlx4_uc_steer_add(dev, port, entry->mac, &qpn, 0);
 		if (err || index < 0)
 			return err;
 	}

 	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;
 	}
 out:
 	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, 1, MLX4_CMD_SET_PORT,
 		       MLX4_CMD_TIME_CLASS_B);

 	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;

 	mutex_lock(&table->mutex);
 	for (i = MLX4_VLAN_REGULAR; i < MLX4_MAX_VLAN_NUM; i++) {
 		if (free < 0 && (table->refs[i] == 0)) {
 			free = i;
 			continue;
 		}

 		if (table->refs[i] &&
 		    (vlan == (MLX4_VLAN_MASK &
 			      be32_to_cpu(table->entries[i])))) {
 			/* Vlan already registered, increase references count */
 			*index = i;
 			++table->refs[i];
 			goto out;
 		}
 	}

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

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

 	/* Register new MAC */
 	table->refs[free] = 1;
 	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;
 	}

 	*index = free;
 	++table->total;
 out:
 	mutex_unlock(&table->mutex);
 	return err;
 }
 EXPORT_SYMBOL_GPL(mlx4_register_vlan);

 void mlx4_unregister_vlan(struct mlx4_dev *dev, u8 port, int index)
 {
 	struct mlx4_vlan_table *table = &mlx4_priv(dev)->port[port].vlan_table;

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

 	mutex_lock(&table->mutex);
 	if (!table->refs[index]) {
 		mlx4_warn(dev, "No vlan entry for index %d\n", index);
 		goto out;
 	}
 	if (--table->refs[index]) {
 		mlx4_dbg(dev, "Have more references for index %d,"
 			 "no need to modify vlan table\n", index);
 		goto out;
 	}
 	table->entries[index] = 0;
 	mlx4_set_port_vlan_table(dev, port, table->entries);
 	--table->total;
 out:
 	mutex_unlock(&table->mutex);
 }
 EXPORT_SYMBOL_GPL(mlx4_unregister_vlan);

 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;
 	memset(inbuf, 0, 256);
 	memset(outbuf, 0, 256);
 	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);
 	if (!err)
 		*caps = *(__be32 *) (outbuf + 84);
 	mlx4_free_cmd_mailbox(dev, inmailbox);
 	mlx4_free_cmd_mailbox(dev, outmailbox);
 	return err;
 }

 int mlx4_SET_PORT(struct mlx4_dev *dev, u8 port)
 {
 	struct mlx4_cmd_mailbox *mailbox;
 	int err;

 	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);

 	memset(mailbox->buf, 0, 256);

 	((__be32 *) mailbox->buf)[1] = dev->caps.ib_port_def_cap[port];
 	err = mlx4_cmd(dev, mailbox->dma, port, 0, MLX4_CMD_SET_PORT,
 		       MLX4_CMD_TIME_CLASS_B);

 	mlx4_free_cmd_mailbox(dev, mailbox);
 	return err;
 }
	/*
	* 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/mlx4/cmd.h>

	#include "mlx4.h"

	#define MLX4_MAC_VALID (1ull << 63)
	#define MLX4_MAC_MASK 0xffffffffffffULL

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

	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->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->max = 1 << dev->caps.log_num_vlans;
	table->total = 0;
	}

	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, 1, MLX4_CMD_SET_PORT,
	MLX4_CMD_TIME_CLASS_B);

	mlx4_free_cmd_mailbox(dev, mailbox);
	return err;
	}

	static int mlx4_uc_steer_add(struct mlx4_dev *dev, u8 port,
	u64 mac, int *qpn, u8 reserve)
	{
	struct mlx4_qp qp;
	u8 gid[16] = {0};
	int err;

	if (reserve) {
	err = mlx4_qp_reserve_range(dev, 1, 1, qpn);
	if (err) {
	mlx4_err(dev, "Failed to reserve qp for mac registration\n");
	return err;
	}
	}
	qp.qpn = *qpn;

	mac &= 0xffffffffffffULL;
	mac = cpu_to_be64(mac << 16);
	memcpy(&gid[10], &mac, ETH_ALEN);
	gid[5] = port;
	gid[7] = MLX4_UC_STEER << 1;

	err = mlx4_qp_attach_common(dev, &qp, gid, 0,
	MLX4_PROT_ETH, MLX4_UC_STEER);
	if (err && reserve)
	mlx4_qp_release_range(dev, *qpn, 1);

	return err;
	}

	static void mlx4_uc_steer_release(struct mlx4_dev *dev, u8 port,
	u64 mac, int qpn, u8 free)
	{
	struct mlx4_qp qp;
	u8 gid[16] = {0};

	qp.qpn = qpn;
	mac &= 0xffffffffffffULL;
	mac = cpu_to_be64(mac << 16);
	memcpy(&gid[10], &mac, ETH_ALEN);
	gid[5] = port;
	gid[7] = MLX4_UC_STEER << 1;

	mlx4_qp_detach_common(dev, &qp, gid, MLX4_PROT_ETH, MLX4_UC_STEER);
	if (free)
	mlx4_qp_release_range(dev, qpn, 1);
	}

	int mlx4_register_mac(struct mlx4_dev dev, u8 port, u64 mac, int qpn, u8 wrap)
	{
	struct mlx4_port_info *info = &mlx4_priv(dev)->port[port];
	struct mlx4_mac_table *table = &info->mac_table;
	struct mlx4_mac_entry *entry;
	int i, err = 0;
	int free = -1;

	if (dev->caps.vep_uc_steering) {
	err = mlx4_uc_steer_add(dev, port, mac, qpn, 1);
	if (!err) {
	entry = kmalloc(sizeof *entry, GFP_KERNEL);
	if (!entry) {
	mlx4_uc_steer_release(dev, port, mac, *qpn, 1);
	return -ENOMEM;
	}
	entry->mac = mac;
	err = radix_tree_insert(&info->mac_tree, *qpn, entry);
	if (err) {
	mlx4_uc_steer_release(dev, port, mac, *qpn, 1);
	return err;
	}
	} else
	return err;
	}
	mlx4_dbg(dev, "Registering MAC: 0x%llx\n", (unsigned long long) mac);
	mutex_lock(&table->mutex);
	for (i = 0; i < MLX4_MAX_MAC_NUM - 1; i++) {
	if (free < 0 && !table->refs[i]) {
	free = i;
	continue;
	}

	if (mac == (MLX4_MAC_MASK & be64_to_cpu(table->entries[i]))) {
	/* MAC already registered, increase references count */
	++table->refs[i];
	goto out;
	}
	}

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

	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->refs[free] = 1;
	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->refs[free] = 0;
	table->entries[free] = 0;
	goto out;
	}

	if (!dev->caps.vep_uc_steering)
	*qpn = info->base_qpn + free;
	++table->total;
	out:
	mutex_unlock(&table->mutex);
	return err;
	}
	EXPORT_SYMBOL_GPL(mlx4_register_mac);

	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 (mac == (MLX4_MAC_MASK & be64_to_cpu(table->entries[i])))
	return i;
	}
	/* Mac not found */
	return -EINVAL;
	}

	void mlx4_unregister_mac(struct mlx4_dev *dev, u8 port, int qpn)
	{
	struct mlx4_port_info *info = &mlx4_priv(dev)->port[port];
	struct mlx4_mac_table *table = &info->mac_table;
	int index = qpn - info->base_qpn;
	struct mlx4_mac_entry *entry;

	if (dev->caps.vep_uc_steering) {
	entry = radix_tree_lookup(&info->mac_tree, qpn);
	if (entry) {
	mlx4_uc_steer_release(dev, port, entry->mac, qpn, 1);
	radix_tree_delete(&info->mac_tree, qpn);
	index = find_index(dev, table, entry->mac);
	kfree(entry);
	}
	}

	mutex_lock(&table->mutex);

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

	table->entries[index] = 0;
	mlx4_set_port_mac_table(dev, port, table->entries);
	--table->total;
	out:
	mutex_unlock(&table->mutex);
	}
	EXPORT_SYMBOL_GPL(mlx4_unregister_mac);

	int mlx4_replace_mac(struct mlx4_dev *dev, u8 port, int qpn, u64 new_mac, u8 wrap)
	{
	struct mlx4_port_info *info = &mlx4_priv(dev)->port[port];
	struct mlx4_mac_table *table = &info->mac_table;
	int index = qpn - info->base_qpn;
	struct mlx4_mac_entry *entry;
	int err;

	if (dev->caps.vep_uc_steering) {
	entry = radix_tree_lookup(&info->mac_tree, qpn);
	if (!entry)
	return -EINVAL;
	index = find_index(dev, table, entry->mac);
	mlx4_uc_steer_release(dev, port, entry->mac, qpn, 0);
	entry->mac = new_mac;
	err = mlx4_uc_steer_add(dev, port, entry->mac, &qpn, 0);
	if (err \|\| index < 0)
	return err;
	}

	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;
	}
	out:
	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, 1, MLX4_CMD_SET_PORT,
	MLX4_CMD_TIME_CLASS_B);

	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;

	mutex_lock(&table->mutex);
	for (i = MLX4_VLAN_REGULAR; i < MLX4_MAX_VLAN_NUM; i++) {
	if (free < 0 && (table->refs[i] == 0)) {
	free = i;
	continue;
	}

	if (table->refs[i] &&
	(vlan == (MLX4_VLAN_MASK &
	be32_to_cpu(table->entries[i])))) {
	/* Vlan already registered, increase references count */
	*index = i;
	++table->refs[i];
	goto out;
	}
	}

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

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

	/* Register new MAC */
	table->refs[free] = 1;
	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;
	}

	*index = free;
	++table->total;
	out:
	mutex_unlock(&table->mutex);
	return err;
	}
	EXPORT_SYMBOL_GPL(mlx4_register_vlan);

	void mlx4_unregister_vlan(struct mlx4_dev *dev, u8 port, int index)
	{
	struct mlx4_vlan_table *table = &mlx4_priv(dev)->port[port].vlan_table;

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

	mutex_lock(&table->mutex);
	if (!table->refs[index]) {
	mlx4_warn(dev, "No vlan entry for index %d\n", index);
	goto out;
	}
	if (--table->refs[index]) {
	mlx4_dbg(dev, "Have more references for index %d,"
	"no need to modify vlan table\n", index);
	goto out;
	}
	table->entries[index] = 0;
	mlx4_set_port_vlan_table(dev, port, table->entries);
	--table->total;
	out:
	mutex_unlock(&table->mutex);
	}
	EXPORT_SYMBOL_GPL(mlx4_unregister_vlan);

	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;
	memset(inbuf, 0, 256);
	memset(outbuf, 0, 256);
	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);
	if (!err)
	caps = (__be32 *) (outbuf + 84);
	mlx4_free_cmd_mailbox(dev, inmailbox);
	mlx4_free_cmd_mailbox(dev, outmailbox);
	return err;
	}

	int mlx4_SET_PORT(struct mlx4_dev *dev, u8 port)
	{
	struct mlx4_cmd_mailbox *mailbox;
	int err;

	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);

	memset(mailbox->buf, 0, 256);

	((__be32 *) mailbox->buf)[1] = dev->caps.ib_port_def_cap[port];
	err = mlx4_cmd(dev, mailbox->dma, port, 0, MLX4_CMD_SET_PORT,
	MLX4_CMD_TIME_CLASS_B);

	mlx4_free_cmd_mailbox(dev, mailbox);
	return err;
	}