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>

4 files changed, 307 insertions, 1 deletions

diff --git a/drivers/net/mlx4/Makefile b/drivers/net/mlx4/Makefile
index 0952a6528f58..9f493666e27b 100644
--- a/drivers/net/mlx4/Makefile
+++ b/drivers/net/mlx4/Makefile
@@ -1,4 +1,4 @@
 obj-$(CONFIG_MLX4_CORE)         += mlx4_core.o
 
 mlx4_core-y :=  alloc.o catas.o cmd.o cq.o eq.o fw.o icm.o intf.o main.o mcg.o \
-                mr.o pd.o profile.o qp.o reset.o srq.o
+                mr.o pd.o port.o profile.o qp.o reset.o srq.o
diff --git a/drivers/net/mlx4/main.c b/drivers/net/mlx4/main.c
index 28f36b88de38..0a5c8bfb3f1f 100644
--- a/drivers/net/mlx4/main.c
+++ b/drivers/net/mlx4/main.c
@@ -780,11 +780,22 @@ no_msi:
                 priv->eq_table.eq[i].irq = dev->pdev->irq;
 }
 
+static void mlx4_init_port_info(struct mlx4_dev *dev, int port)
+{
+        struct mlx4_port_info *info = &mlx4_priv(dev)->port[port];
+
+        info->dev = dev;
+        info->port = port;
+        mlx4_init_mac_table(dev, &info->mac_table);
+        mlx4_init_vlan_table(dev, &info->vlan_table);
+}
+
 static int __mlx4_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
 {
         struct mlx4_priv *priv;
         struct mlx4_dev *dev;
         int err;
+        int port;
 
         printk(KERN_INFO PFX "Initializing %s\n",
                pci_name(pdev));
@@ -894,6 +905,9 @@ static int __mlx4_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
         if (err)
                 goto err_close;
 
+        for (port = 1; port <= dev->caps.num_ports; port++)
+                mlx4_init_port_info(dev, port);
+
         err = mlx4_register_device(dev);
         if (err)
                 goto err_cleanup;
diff --git a/drivers/net/mlx4/mlx4.h b/drivers/net/mlx4/mlx4.h
index 9e2f44c31810..23309f381ee3 100644
--- a/drivers/net/mlx4/mlx4.h
+++ b/drivers/net/mlx4/mlx4.h
@@ -252,6 +252,35 @@ struct mlx4_catas_err {
         struct list_head        list;
 };
 
+#define MLX4_MAX_MAC_NUM        128
+#define MLX4_MAC_TABLE_SIZE     (MLX4_MAX_MAC_NUM << 3)
+
+struct mlx4_mac_table {
+        __be64                  entries[MLX4_MAX_MAC_NUM];
+        int                     refs[MLX4_MAX_MAC_NUM];
+        struct mutex            mutex;
+        int                     total;
+        int                     max;
+};
+
+#define MLX4_MAX_VLAN_NUM       128
+#define MLX4_VLAN_TABLE_SIZE    (MLX4_MAX_VLAN_NUM << 2)
+
+struct mlx4_vlan_table {
+        __be32                  entries[MLX4_MAX_VLAN_NUM];
+        int                     refs[MLX4_MAX_VLAN_NUM];
+        struct mutex            mutex;
+        int                     total;
+        int                     max;
+};
+
+struct mlx4_port_info {
+        struct mlx4_dev        *dev;
+        int                     port;
+        struct mlx4_mac_table   mac_table;
+        struct mlx4_vlan_table  vlan_table;
+};
+
 struct mlx4_priv {
         struct mlx4_dev         dev;
 
@@ -280,6 +309,7 @@ struct mlx4_priv {
 
         struct mlx4_uar         driver_uar;
         void __iomem           *kar;
+        struct mlx4_port_info   port[MLX4_MAX_PORTS + 1];
 };
 
 static inline struct mlx4_priv *mlx4_priv(struct mlx4_dev *dev)
@@ -350,4 +380,7 @@ void mlx4_srq_event(struct mlx4_dev *dev, u32 srqn, int event_type);
 
 void mlx4_handle_catas_err(struct mlx4_dev *dev);
 
+void mlx4_init_mac_table(struct mlx4_dev *dev, struct mlx4_mac_table *table);
+void mlx4_init_vlan_table(struct mlx4_dev *dev, struct mlx4_vlan_table *table);
+
 #endif /* MLX4_H */
diff --git a/drivers/net/mlx4/port.c b/drivers/net/mlx4/port.c
new file mode 100644
index 000000000000..8644f3d978ee
--- /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);