path: root/drivers/net/ethernet/mellanox/mlx4/port.c

/*
 * 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/export.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

#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

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) - MLX4_VLAN_REGULAR;
	table->total = 0;
}

static int mlx4_uc_steer_add(struct mlx4_dev *dev, u8 port, u64 mac, int *qpn)
{
	struct mlx4_qp qp;
	u8 gid[16] = {0};
	__be64 be_mac;
	int err;

	qp.qpn = *qpn;

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

	err = mlx4_unicast_attach(dev, &qp, gid, 0, MLX4_PROT_ETH);
	if (err)
		mlx4_warn(dev, "Failed Attaching Unicast\n");

	return err;
}

static void mlx4_uc_steer_release(struct mlx4_dev *dev, u8 port,
				  u64 mac, int qpn)
{
	struct mlx4_qp qp;
	u8 gid[16] = {0};
	__be64 be_mac;

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

	mlx4_unicast_detach(dev, &qp, gid, MLX4_PROT_ETH);
}

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

int mlx4_get_eth_qp(struct mlx4_dev *dev, u8 port, u64 mac, int *qpn)
{
	struct mlx4_port_info *info = &mlx4_priv(dev)->port[port];
	struct mlx4_mac_entry *entry;
	int index = 0;
	int err = 0;

	mlx4_dbg(dev, "Registering MAC: 0x%llx for adding\n",
			(unsigned long long) mac);