FreeBSD/Linux Kernel Cross Reference
sys/dev/mlx5/mlx5_core/mlx5_mpfs.c

     /*-
      * Copyright (c) 2019, Mellanox Technologies, Ltd.  All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
      *    notice, this list of conditions and the following disclaimer.
      * 2. 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.
     *
     * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS `AS IS' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     * $FreeBSD$
     */
    
    #include "opt_rss.h"
    #include "opt_ratelimit.h"
    
    #include <linux/types.h>
    #include <linux/etherdevice.h>
    
    #include <dev/mlx5/mlx5_ifc.h>
    #include <dev/mlx5/device.h>
    #include <dev/mlx5/mpfs.h>
    #include <dev/mlx5/driver.h>
    
    #include <dev/mlx5/mlx5_core/mlx5_core.h>
    
    #define MPFS_LOCK(dev) spin_lock(&(dev)->mpfs.spinlock)
    #define MPFS_UNLOCK(dev) spin_unlock(&(dev)->mpfs.spinlock)
    
    int
    mlx5_mpfs_add_mac(struct mlx5_core_dev *dev, u32 *p_index, const u8 *mac,
        u8 vlan_valid, u16 vlan)
    {
            const u32 l2table_size = MIN(1U << MLX5_CAP_GEN(dev, log_max_l2_table),
                MLX5_MPFS_TABLE_MAX);
            u32 in[MLX5_ST_SZ_DW(set_l2_table_entry_in)] = {};
            u32 out[MLX5_ST_SZ_DW(set_l2_table_entry_out)] = {};
            u8 *in_mac_addr;
            u32 index;
            int err;
    
            if (!MLX5_CAP_GEN(dev, eswitch_flow_table)) {
                    *p_index = 0;
                    return (0);
            }
    
            MPFS_LOCK(dev);
            index = find_first_zero_bit(dev->mpfs.bitmap, l2table_size);
            if (index < l2table_size)
                    set_bit(index, dev->mpfs.bitmap);
            MPFS_UNLOCK(dev);
    
            if (index >= l2table_size)
                    return (-ENOMEM);
    
            MLX5_SET(set_l2_table_entry_in, in, opcode, MLX5_CMD_OP_SET_L2_TABLE_ENTRY);
            MLX5_SET(set_l2_table_entry_in, in, table_index, index);
            MLX5_SET(set_l2_table_entry_in, in, vlan_valid, vlan_valid);
            MLX5_SET(set_l2_table_entry_in, in, vlan, vlan);
    
            in_mac_addr = MLX5_ADDR_OF(set_l2_table_entry_in, in, mac_address);
            ether_addr_copy(&in_mac_addr[2], mac);
    
            err = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
            if (err != 0) {
                    MPFS_LOCK(dev);
                    clear_bit(index, dev->mpfs.bitmap);
                    MPFS_UNLOCK(dev);
            } else {
                    *p_index = index;
            }
            return (err);
    }
    
    int
    mlx5_mpfs_del_mac(struct mlx5_core_dev *dev, u32 index)
    {
            u32 in[MLX5_ST_SZ_DW(delete_l2_table_entry_in)] = {};
            u32 out[MLX5_ST_SZ_DW(delete_l2_table_entry_out)] = {};
            int err;
    
            if (!MLX5_CAP_GEN(dev, eswitch_flow_table)) {
                    if (index != 0)
                            return (-EINVAL);
                    return (0);
           }
   
           MLX5_SET(delete_l2_table_entry_in, in, opcode, MLX5_CMD_OP_DELETE_L2_TABLE_ENTRY);
           MLX5_SET(delete_l2_table_entry_in, in, table_index, index);
   
           err = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
           if (err == 0) {
                   MPFS_LOCK(dev);
                   clear_bit(index, dev->mpfs.bitmap);
                   MPFS_UNLOCK(dev);
           }
           return (err);
   }
   
   int
   mlx5_mpfs_init(struct mlx5_core_dev *dev)
   {
   
           spin_lock_init(&dev->mpfs.spinlock);
           bitmap_zero(dev->mpfs.bitmap, MLX5_MPFS_TABLE_MAX);
           return (0);
   }
   
   void
   mlx5_mpfs_destroy(struct mlx5_core_dev *dev)
   {
           u32 num;
   
           num = bitmap_weight(dev->mpfs.bitmap, MLX5_MPFS_TABLE_MAX);
           if (num != 0)
                   mlx5_core_err(dev, "Leaking %u MPFS MAC table entries\n", num);
   
           spin_lock_destroy(&dev->mpfs.spinlock);
   }

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