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352b09edd7
Commit 793730bf ("mlx4_core: Don't perform SET_PORT command for
Ethernet ports") introduced a leak of mailbox buffers when SET_PORT
was called for Ethernet ports, since it added a return after the
mailbox was allocated. Fix this by checking the port type and
returning *before* allocating the mailbox.
Signed-off-by: Roland Dreier <rolandd@cisco.com>
317 lines
8 KiB
C
317 lines
8 KiB
C
/*
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* Copyright (c) 2007 Mellanox Technologies. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <linux/errno.h>
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#include <linux/if_ether.h>
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#include <linux/mlx4/cmd.h>
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#include "mlx4.h"
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#define MLX4_MAC_VALID (1ull << 63)
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#define MLX4_MAC_MASK 0xffffffffffffULL
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#define MLX4_VLAN_VALID (1u << 31)
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#define MLX4_VLAN_MASK 0xfff
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void mlx4_init_mac_table(struct mlx4_dev *dev, struct mlx4_mac_table *table)
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{
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int i;
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mutex_init(&table->mutex);
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for (i = 0; i < MLX4_MAX_MAC_NUM; i++) {
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table->entries[i] = 0;
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table->refs[i] = 0;
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}
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table->max = 1 << dev->caps.log_num_macs;
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table->total = 0;
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}
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void mlx4_init_vlan_table(struct mlx4_dev *dev, struct mlx4_vlan_table *table)
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{
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int i;
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mutex_init(&table->mutex);
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for (i = 0; i < MLX4_MAX_VLAN_NUM; i++) {
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table->entries[i] = 0;
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table->refs[i] = 0;
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}
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table->max = 1 << dev->caps.log_num_vlans;
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table->total = 0;
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}
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static int mlx4_set_port_mac_table(struct mlx4_dev *dev, u8 port,
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__be64 *entries)
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{
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struct mlx4_cmd_mailbox *mailbox;
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u32 in_mod;
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int err;
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mailbox = mlx4_alloc_cmd_mailbox(dev);
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if (IS_ERR(mailbox))
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return PTR_ERR(mailbox);
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memcpy(mailbox->buf, entries, MLX4_MAC_TABLE_SIZE);
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in_mod = MLX4_SET_PORT_MAC_TABLE << 8 | port;
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err = mlx4_cmd(dev, mailbox->dma, in_mod, 1, MLX4_CMD_SET_PORT,
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MLX4_CMD_TIME_CLASS_B);
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mlx4_free_cmd_mailbox(dev, mailbox);
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return err;
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}
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int mlx4_register_mac(struct mlx4_dev *dev, u8 port, u64 mac, int *index)
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{
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struct mlx4_mac_table *table = &mlx4_priv(dev)->port[port].mac_table;
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int i, err = 0;
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int free = -1;
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mlx4_dbg(dev, "Registering MAC: 0x%llx\n", (unsigned long long) mac);
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mutex_lock(&table->mutex);
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for (i = 0; i < MLX4_MAX_MAC_NUM - 1; i++) {
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if (free < 0 && !table->refs[i]) {
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free = i;
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continue;
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}
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if (mac == (MLX4_MAC_MASK & be64_to_cpu(table->entries[i]))) {
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/* MAC already registered, increase refernce count */
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*index = i;
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++table->refs[i];
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goto out;
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}
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}
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mlx4_dbg(dev, "Free MAC index is %d\n", free);
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if (table->total == table->max) {
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/* No free mac entries */
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err = -ENOSPC;
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goto out;
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}
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/* Register new MAC */
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table->refs[free] = 1;
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table->entries[free] = cpu_to_be64(mac | MLX4_MAC_VALID);
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err = mlx4_set_port_mac_table(dev, port, table->entries);
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if (unlikely(err)) {
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mlx4_err(dev, "Failed adding MAC: 0x%llx\n", (unsigned long long) mac);
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table->refs[free] = 0;
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table->entries[free] = 0;
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goto out;
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}
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*index = free;
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++table->total;
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out:
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mutex_unlock(&table->mutex);
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return err;
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}
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EXPORT_SYMBOL_GPL(mlx4_register_mac);
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void mlx4_unregister_mac(struct mlx4_dev *dev, u8 port, int index)
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{
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struct mlx4_mac_table *table = &mlx4_priv(dev)->port[port].mac_table;
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mutex_lock(&table->mutex);
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if (!table->refs[index]) {
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mlx4_warn(dev, "No MAC entry for index %d\n", index);
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goto out;
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}
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if (--table->refs[index]) {
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mlx4_warn(dev, "Have more references for index %d,"
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"no need to modify MAC table\n", index);
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goto out;
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}
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table->entries[index] = 0;
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mlx4_set_port_mac_table(dev, port, table->entries);
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--table->total;
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out:
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mutex_unlock(&table->mutex);
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}
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EXPORT_SYMBOL_GPL(mlx4_unregister_mac);
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static int mlx4_set_port_vlan_table(struct mlx4_dev *dev, u8 port,
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__be32 *entries)
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{
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struct mlx4_cmd_mailbox *mailbox;
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u32 in_mod;
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int err;
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mailbox = mlx4_alloc_cmd_mailbox(dev);
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if (IS_ERR(mailbox))
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return PTR_ERR(mailbox);
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memcpy(mailbox->buf, entries, MLX4_VLAN_TABLE_SIZE);
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in_mod = MLX4_SET_PORT_VLAN_TABLE << 8 | port;
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err = mlx4_cmd(dev, mailbox->dma, in_mod, 1, MLX4_CMD_SET_PORT,
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MLX4_CMD_TIME_CLASS_B);
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mlx4_free_cmd_mailbox(dev, mailbox);
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return err;
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}
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int mlx4_register_vlan(struct mlx4_dev *dev, u8 port, u16 vlan, int *index)
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{
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struct mlx4_vlan_table *table = &mlx4_priv(dev)->port[port].vlan_table;
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int i, err = 0;
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int free = -1;
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mutex_lock(&table->mutex);
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for (i = MLX4_VLAN_REGULAR; i < MLX4_MAX_VLAN_NUM; i++) {
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if (free < 0 && (table->refs[i] == 0)) {
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free = i;
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continue;
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}
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if (table->refs[i] &&
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(vlan == (MLX4_VLAN_MASK &
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be32_to_cpu(table->entries[i])))) {
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/* Vlan already registered, increase refernce count */
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*index = i;
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++table->refs[i];
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goto out;
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}
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}
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if (table->total == table->max) {
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/* No free vlan entries */
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err = -ENOSPC;
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goto out;
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}
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/* Register new MAC */
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table->refs[free] = 1;
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table->entries[free] = cpu_to_be32(vlan | MLX4_VLAN_VALID);
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err = mlx4_set_port_vlan_table(dev, port, table->entries);
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if (unlikely(err)) {
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mlx4_warn(dev, "Failed adding vlan: %u\n", vlan);
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table->refs[free] = 0;
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table->entries[free] = 0;
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goto out;
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}
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*index = free;
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++table->total;
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out:
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mutex_unlock(&table->mutex);
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return err;
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}
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EXPORT_SYMBOL_GPL(mlx4_register_vlan);
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void mlx4_unregister_vlan(struct mlx4_dev *dev, u8 port, int index)
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{
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struct mlx4_vlan_table *table = &mlx4_priv(dev)->port[port].vlan_table;
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if (index < MLX4_VLAN_REGULAR) {
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mlx4_warn(dev, "Trying to free special vlan index %d\n", index);
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return;
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}
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mutex_lock(&table->mutex);
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if (!table->refs[index]) {
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mlx4_warn(dev, "No vlan entry for index %d\n", index);
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goto out;
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}
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if (--table->refs[index]) {
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mlx4_dbg(dev, "Have more references for index %d,"
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"no need to modify vlan table\n", index);
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goto out;
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}
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table->entries[index] = 0;
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mlx4_set_port_vlan_table(dev, port, table->entries);
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--table->total;
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out:
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mutex_unlock(&table->mutex);
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}
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EXPORT_SYMBOL_GPL(mlx4_unregister_vlan);
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int mlx4_get_port_ib_caps(struct mlx4_dev *dev, u8 port, __be32 *caps)
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{
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struct mlx4_cmd_mailbox *inmailbox, *outmailbox;
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u8 *inbuf, *outbuf;
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int err;
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inmailbox = mlx4_alloc_cmd_mailbox(dev);
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if (IS_ERR(inmailbox))
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return PTR_ERR(inmailbox);
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outmailbox = mlx4_alloc_cmd_mailbox(dev);
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if (IS_ERR(outmailbox)) {
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mlx4_free_cmd_mailbox(dev, inmailbox);
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return PTR_ERR(outmailbox);
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}
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inbuf = inmailbox->buf;
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outbuf = outmailbox->buf;
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memset(inbuf, 0, 256);
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memset(outbuf, 0, 256);
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inbuf[0] = 1;
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inbuf[1] = 1;
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inbuf[2] = 1;
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inbuf[3] = 1;
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*(__be16 *) (&inbuf[16]) = cpu_to_be16(0x0015);
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*(__be32 *) (&inbuf[20]) = cpu_to_be32(port);
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err = mlx4_cmd_box(dev, inmailbox->dma, outmailbox->dma, port, 3,
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MLX4_CMD_MAD_IFC, MLX4_CMD_TIME_CLASS_C);
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if (!err)
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*caps = *(__be32 *) (outbuf + 84);
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mlx4_free_cmd_mailbox(dev, inmailbox);
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mlx4_free_cmd_mailbox(dev, outmailbox);
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return err;
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}
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int mlx4_SET_PORT(struct mlx4_dev *dev, u8 port)
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{
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struct mlx4_cmd_mailbox *mailbox;
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int err;
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if (dev->caps.port_type[port] == MLX4_PORT_TYPE_ETH)
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return 0;
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mailbox = mlx4_alloc_cmd_mailbox(dev);
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if (IS_ERR(mailbox))
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return PTR_ERR(mailbox);
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memset(mailbox->buf, 0, 256);
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((__be32 *) mailbox->buf)[1] = dev->caps.ib_port_def_cap[port];
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err = mlx4_cmd(dev, mailbox->dma, port, 0, MLX4_CMD_SET_PORT,
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MLX4_CMD_TIME_CLASS_B);
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mlx4_free_cmd_mailbox(dev, mailbox);
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return err;
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}
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