mlx4_core: Ethernet MAC/VLAN management
Add support for managing MAC and VLAN filters for each port.
Signed-off-by: Yevgeny Petrilin <yevgenyp@mellanox.co.il>
Signed-off-by: Oren Duer <oren@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
diff --git a/drivers/net/mlx4/port.c b/drivers/net/mlx4/port.c
new file mode 100644
index 0000000..8644f3d9
--- /dev/null
+++ b/drivers/net/mlx4/port.c
@@ -0,0 +1,259 @@
+/*
+ * 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;
+}
+
+int mlx4_register_mac(struct mlx4_dev *dev, u8 port, u64 mac, int *index)
+{
+ struct mlx4_mac_table *table = &mlx4_priv(dev)->port[port].mac_table;
+ int i, err = 0;
+ int free = -1;
+
+ 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 refernce count */
+ *index = i;
+ ++table->refs[i];
+ 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;
+ }
+
+ *index = free;
+ ++table->total;
+out:
+ mutex_unlock(&table->mutex);
+ return err;
+}
+EXPORT_SYMBOL_GPL(mlx4_register_mac);
+
+void mlx4_unregister_mac(struct mlx4_dev *dev, u8 port, int index)
+{
+ struct mlx4_mac_table *table = &mlx4_priv(dev)->port[port].mac_table;
+
+ mutex_lock(&table->mutex);
+ if (!table->refs[index]) {
+ mlx4_warn(dev, "No MAC entry for index %d\n", index);
+ goto out;
+ }
+ if (--table->refs[index]) {
+ mlx4_warn(dev, "Have more references for index %d,"
+ "no need to modify MAC table\n", 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);
+
+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_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 refernce count */
+ *index = i;
+ ++table->refs[i];
+ 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);