1 /*- 2 * Copyright (c) 2019, Mellanox Technologies, Ltd. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS `AS IS' AND 14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE 17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23 * SUCH DAMAGE. 24 */ 25 26 #include "opt_rss.h" 27 #include "opt_ratelimit.h" 28 29 #include <linux/types.h> 30 #include <linux/etherdevice.h> 31 32 #include <dev/mlx5/mlx5_ifc.h> 33 #include <dev/mlx5/device.h> 34 #include <dev/mlx5/mpfs.h> 35 #include <dev/mlx5/driver.h> 36 37 #include <dev/mlx5/mlx5_core/mlx5_core.h> 38 39 #define MPFS_LOCK(dev) spin_lock(&(dev)->mpfs.spinlock) 40 #define MPFS_UNLOCK(dev) spin_unlock(&(dev)->mpfs.spinlock) 41 42 int 43 mlx5_mpfs_add_mac(struct mlx5_core_dev *dev, u32 *p_index, const u8 *mac, 44 u8 vlan_valid, u16 vlan) 45 { 46 const u32 l2table_size = MIN(1U << MLX5_CAP_GEN(dev, log_max_l2_table), 47 MLX5_MPFS_TABLE_MAX); 48 u32 in[MLX5_ST_SZ_DW(set_l2_table_entry_in)] = {}; 49 u32 out[MLX5_ST_SZ_DW(set_l2_table_entry_out)] = {}; 50 u8 *in_mac_addr; 51 u32 index; 52 int err; 53 54 if (!MLX5_CAP_GEN(dev, eswitch_flow_table)) { 55 *p_index = 0; 56 return (0); 57 } 58 59 MPFS_LOCK(dev); 60 index = find_first_zero_bit(dev->mpfs.bitmap, l2table_size); 61 if (index < l2table_size) 62 set_bit(index, dev->mpfs.bitmap); 63 MPFS_UNLOCK(dev); 64 65 if (index >= l2table_size) 66 return (-ENOMEM); 67 68 MLX5_SET(set_l2_table_entry_in, in, opcode, MLX5_CMD_OP_SET_L2_TABLE_ENTRY); 69 MLX5_SET(set_l2_table_entry_in, in, table_index, index); 70 MLX5_SET(set_l2_table_entry_in, in, vlan_valid, vlan_valid); 71 MLX5_SET(set_l2_table_entry_in, in, vlan, vlan); 72 73 in_mac_addr = MLX5_ADDR_OF(set_l2_table_entry_in, in, mac_address); 74 ether_addr_copy(&in_mac_addr[2], mac); 75 76 err = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out)); 77 if (err != 0) { 78 MPFS_LOCK(dev); 79 clear_bit(index, dev->mpfs.bitmap); 80 MPFS_UNLOCK(dev); 81 } else { 82 *p_index = index; 83 } 84 return (err); 85 } 86 87 int 88 mlx5_mpfs_del_mac(struct mlx5_core_dev *dev, u32 index) 89 { 90 u32 in[MLX5_ST_SZ_DW(delete_l2_table_entry_in)] = {}; 91 u32 out[MLX5_ST_SZ_DW(delete_l2_table_entry_out)] = {}; 92 int err; 93 94 if (!MLX5_CAP_GEN(dev, eswitch_flow_table)) { 95 if (index != 0) 96 return (-EINVAL); 97 return (0); 98 } 99 100 MLX5_SET(delete_l2_table_entry_in, in, opcode, MLX5_CMD_OP_DELETE_L2_TABLE_ENTRY); 101 MLX5_SET(delete_l2_table_entry_in, in, table_index, index); 102 103 err = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out)); 104 if (err == 0) { 105 MPFS_LOCK(dev); 106 clear_bit(index, dev->mpfs.bitmap); 107 MPFS_UNLOCK(dev); 108 } 109 return (err); 110 } 111 112 int 113 mlx5_mpfs_init(struct mlx5_core_dev *dev) 114 { 115 116 spin_lock_init(&dev->mpfs.spinlock); 117 bitmap_zero(dev->mpfs.bitmap, MLX5_MPFS_TABLE_MAX); 118 return (0); 119 } 120 121 void 122 mlx5_mpfs_destroy(struct mlx5_core_dev *dev) 123 { 124 u32 num; 125 126 num = bitmap_weight(dev->mpfs.bitmap, MLX5_MPFS_TABLE_MAX); 127 if (num != 0) 128 mlx5_core_err(dev, "Leaking %u MPFS MAC table entries\n", num); 129 130 spin_lock_destroy(&dev->mpfs.spinlock); 131 } 132