drivers/net/ethernet/mellanox/mlx5/core/eswitch.h

   1 /*
   2  * Copyright (c) 2015, Mellanox Technologies, Ltd.  All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  */
  32
  33 #ifndef __MLX5_ESWITCH_H__
  34 #define __MLX5_ESWITCH_H__
  35
  36 #include <linux/if_ether.h>
  37 #include <linux/if_link.h>
  38 #include <linux/mlx5/device.h>
  39
  40 #define MLX5_MAX_UC_PER_VPORT(dev) \
  41         (1 << MLX5_CAP_GEN(dev, log_max_current_uc_list))
  42
  43 #define MLX5_MAX_MC_PER_VPORT(dev) \
  44         (1 << MLX5_CAP_GEN(dev, log_max_current_mc_list))
  45
  46 #define MLX5_L2_ADDR_HASH_SIZE (BIT(BITS_PER_BYTE))
  47 #define MLX5_L2_ADDR_HASH(addr) (addr[5])
  48
  49 /* L2 -mac address based- hash helpers */
  50 struct l2addr_node {
  51         struct hlist_node hlist;
  52         u8                addr[ETH_ALEN];
  53 };
  54
  55 #define for_each_l2hash_node(hn, tmp, hash, i) \
  56         for (i = 0; i < MLX5_L2_ADDR_HASH_SIZE; i++) \
  57                 hlist_for_each_entry_safe(hn, tmp, &hash[i], hlist)
  58
  59 #define l2addr_hash_find(hash, mac, type) ({                \
  60         int ix = MLX5_L2_ADDR_HASH(mac);                    \
  61         bool found = false;                                 \
  62         type *ptr = NULL;                                   \
  63                                                             \
  64         hlist_for_each_entry(ptr, &hash[ix], node.hlist)    \
  65                 if (ether_addr_equal(ptr->node.addr, mac)) {\
  66                         found = true;                       \
  67                         break;                              \
  68                 }                                           \
  69         if (!found)                                         \
  70                 ptr = NULL;                                 \
  71         ptr;                                                \
  72 })
  73
  74 #define l2addr_hash_add(hash, mac, type, gfp) ({            \
  75         int ix = MLX5_L2_ADDR_HASH(mac);                    \
  76         type *ptr = NULL;                                   \
  77                                                             \
  78         ptr = kzalloc(sizeof(type), gfp);                   \
  79         if (ptr) {                                          \
  80                 ether_addr_copy(ptr->node.addr, mac);       \
  81                 hlist_add_head(&ptr->node.hlist, &hash[ix]);\
  82         }                                                   \
  83         ptr;                                                \
  84 })
  85
  86 #define l2addr_hash_del(ptr) ({                             \
  87         hlist_del(&ptr->node.hlist);                        \
  88         kfree(ptr);                                         \
  89 })
  90
  91 struct mlx5_vport {
  92         struct mlx5_core_dev    *dev;
  93         int                     vport;
  94         struct hlist_head       uc_list[MLX5_L2_ADDR_HASH_SIZE];
  95         struct hlist_head       mc_list[MLX5_L2_ADDR_HASH_SIZE];
  96         struct work_struct      vport_change_handler;
  97
  98         /* This spinlock protects access to vport data, between
  99          * "esw_vport_disable" and ongoing interrupt "mlx5_eswitch_vport_event"
 100          * once vport marked as disabled new interrupts are discarded.
 101          */
 102         spinlock_t              lock; /* vport events sync */
 103         bool                    enabled;
 104         u16                     enabled_events;
 105 };
 106
 107 struct mlx5_l2_table {
 108         struct hlist_head l2_hash[MLX5_L2_ADDR_HASH_SIZE];
 109         u32                  size;
 110         unsigned long        *bitmap;
 111 };
 112
 113 struct mlx5_eswitch_fdb {
 114         void *fdb;
 115         struct mlx5_flow_group *addr_grp;
 116 };
 117
 118 struct mlx5_eswitch {
 119         struct mlx5_core_dev    *dev;
 120         struct mlx5_l2_table    l2_table;
 121         struct mlx5_eswitch_fdb fdb_table;
 122         struct hlist_head       mc_table[MLX5_L2_ADDR_HASH_SIZE];
 123         struct workqueue_struct *work_queue;
 124         struct mlx5_vport       *vports;
 125         int                     total_vports;
 126         int                     enabled_vports;
 127 };
 128
 129 /* E-Switch API */
 130 int mlx5_eswitch_init(struct mlx5_core_dev *dev);
 131 void mlx5_eswitch_cleanup(struct mlx5_eswitch *esw);
 132 void mlx5_eswitch_vport_event(struct mlx5_eswitch *esw, struct mlx5_eqe *eqe);
 133 int mlx5_eswitch_enable_sriov(struct mlx5_eswitch *esw, int nvfs);
 134 void mlx5_eswitch_disable_sriov(struct mlx5_eswitch *esw);
 135 int mlx5_eswitch_set_vport_mac(struct mlx5_eswitch *esw,
 136                                int vport, u8 mac[ETH_ALEN]);
 137 int mlx5_eswitch_set_vport_state(struct mlx5_eswitch *esw,
 138                                  int vport, int link_state);
 139 int mlx5_eswitch_set_vport_vlan(struct mlx5_eswitch *esw,
 140                                 int vport, u16 vlan, u8 qos);
 141 int mlx5_eswitch_get_vport_config(struct mlx5_eswitch *esw,
 142                                   int vport, struct ifla_vf_info *ivi);
 143 int mlx5_eswitch_get_vport_stats(struct mlx5_eswitch *esw,
 144                                  int vport,
 145                                  struct ifla_vf_stats *vf_stats);
 146
 147 #endif /* __MLX5_ESWITCH_H__ */