net/bridge/br_mrp_switchdev.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2
   3 #include <net/switchdev.h>
   4
   5 #include "br_private_mrp.h"
   6
   7 static enum br_mrp_hw_support
   8 br_mrp_switchdev_port_obj(struct net_bridge *br,
   9                           const struct switchdev_obj *obj, bool add)
  10 {
  11         int err;
  12
  13         if (add)
  14                 err = switchdev_port_obj_add(br->dev, obj, NULL);
  15         else
  16                 err = switchdev_port_obj_del(br->dev, obj);
  17
  18         /* In case of success just return and notify the SW that doesn't need
  19          * to do anything
  20          */
  21         if (!err)
  22                 return BR_MRP_HW;
  23
  24         if (err != -EOPNOTSUPP)
  25                 return BR_MRP_NONE;
  26
  27         /* Continue with SW backup */
  28         return BR_MRP_SW;
  29 }
  30
  31 int br_mrp_switchdev_add(struct net_bridge *br, struct br_mrp *mrp)
  32 {
  33         struct switchdev_obj_mrp mrp_obj = {
  34                 .obj.orig_dev = br->dev,
  35                 .obj.id = SWITCHDEV_OBJ_ID_MRP,
  36                 .p_port = rtnl_dereference(mrp->p_port)->dev,
  37                 .s_port = rtnl_dereference(mrp->s_port)->dev,
  38                 .ring_id = mrp->ring_id,
  39                 .prio = mrp->prio,
  40         };
  41
  42         if (!IS_ENABLED(CONFIG_NET_SWITCHDEV))
  43                 return 0;
  44
  45         return switchdev_port_obj_add(br->dev, &mrp_obj.obj, NULL);
  46 }
  47
  48 int br_mrp_switchdev_del(struct net_bridge *br, struct br_mrp *mrp)
  49 {
  50         struct switchdev_obj_mrp mrp_obj = {
  51                 .obj.orig_dev = br->dev,
  52                 .obj.id = SWITCHDEV_OBJ_ID_MRP,
  53                 .p_port = NULL,
  54                 .s_port = NULL,
  55                 .ring_id = mrp->ring_id,
  56         };
  57
  58         if (!IS_ENABLED(CONFIG_NET_SWITCHDEV))
  59                 return 0;
  60
  61         return switchdev_port_obj_del(br->dev, &mrp_obj.obj);
  62 }
  63
  64 enum br_mrp_hw_support
  65 br_mrp_switchdev_set_ring_role(struct net_bridge *br, struct br_mrp *mrp,
  66                                enum br_mrp_ring_role_type role)
  67 {
  68         struct switchdev_obj_ring_role_mrp mrp_role = {
  69                 .obj.orig_dev = br->dev,
  70                 .obj.id = SWITCHDEV_OBJ_ID_RING_ROLE_MRP,
  71                 .ring_role = role,
  72                 .ring_id = mrp->ring_id,
  73                 .sw_backup = false,
  74         };
  75         enum br_mrp_hw_support support;
  76         int err;
  77
  78         if (!IS_ENABLED(CONFIG_NET_SWITCHDEV))
  79                 return BR_MRP_SW;
  80
  81         support = br_mrp_switchdev_port_obj(br, &mrp_role.obj,
  82                                             role != BR_MRP_RING_ROLE_DISABLED);
  83         if (support != BR_MRP_SW)
  84                 return support;
  85
  86         /* If the driver can't configure to run completely the protocol in HW,
  87          * then try again to configure the HW so the SW can run the protocol.
  88          */
  89         mrp_role.sw_backup = true;
  90         if (role != BR_MRP_RING_ROLE_DISABLED)
  91                 err = switchdev_port_obj_add(br->dev, &mrp_role.obj, NULL);
  92         else
  93                 err = switchdev_port_obj_del(br->dev, &mrp_role.obj);
  94
  95         if (!err)
  96                 return BR_MRP_SW;
  97
  98         return BR_MRP_NONE;
  99 }
 100
 101 enum br_mrp_hw_support
 102 br_mrp_switchdev_send_ring_test(struct net_bridge *br, struct br_mrp *mrp,
 103                                 u32 interval, u8 max_miss, u32 period,
 104                                 bool monitor)
 105 {
 106         struct switchdev_obj_ring_test_mrp test = {
 107                 .obj.orig_dev = br->dev,
 108                 .obj.id = SWITCHDEV_OBJ_ID_RING_TEST_MRP,
 109                 .interval = interval,
 110                 .max_miss = max_miss,
 111                 .ring_id = mrp->ring_id,
 112                 .period = period,
 113                 .monitor = monitor,
 114         };
 115
 116         if (!IS_ENABLED(CONFIG_NET_SWITCHDEV))
 117                 return BR_MRP_SW;
 118
 119         return br_mrp_switchdev_port_obj(br, &test.obj, interval != 0);
 120 }
 121
 122 int br_mrp_switchdev_set_ring_state(struct net_bridge *br,
 123                                     struct br_mrp *mrp,
 124                                     enum br_mrp_ring_state_type state)
 125 {
 126         struct switchdev_obj_ring_state_mrp mrp_state = {
 127                 .obj.orig_dev = br->dev,
 128                 .obj.id = SWITCHDEV_OBJ_ID_RING_STATE_MRP,
 129                 .ring_state = state,
 130                 .ring_id = mrp->ring_id,
 131         };
 132
 133         if (!IS_ENABLED(CONFIG_NET_SWITCHDEV))
 134                 return 0;
 135
 136         return switchdev_port_obj_add(br->dev, &mrp_state.obj, NULL);
 137 }
 138
 139 enum br_mrp_hw_support
 140 br_mrp_switchdev_set_in_role(struct net_bridge *br, struct br_mrp *mrp,
 141                              u16 in_id, u32 ring_id,
 142                              enum br_mrp_in_role_type role)
 143 {
 144         struct switchdev_obj_in_role_mrp mrp_role = {
 145                 .obj.orig_dev = br->dev,
 146                 .obj.id = SWITCHDEV_OBJ_ID_IN_ROLE_MRP,
 147                 .in_role = role,
 148                 .in_id = mrp->in_id,
 149                 .ring_id = mrp->ring_id,
 150                 .i_port = rtnl_dereference(mrp->i_port)->dev,
 151                 .sw_backup = false,
 152         };
 153         enum br_mrp_hw_support support;
 154         int err;
 155
 156         if (!IS_ENABLED(CONFIG_NET_SWITCHDEV))
 157                 return BR_MRP_SW;
 158
 159         support = br_mrp_switchdev_port_obj(br, &mrp_role.obj,
 160                                             role != BR_MRP_IN_ROLE_DISABLED);
 161         if (support != BR_MRP_NONE)
 162                 return support;
 163
 164         /* If the driver can't configure to run completely the protocol in HW,
 165          * then try again to configure the HW so the SW can run the protocol.
 166          */
 167         mrp_role.sw_backup = true;
 168         if (role != BR_MRP_IN_ROLE_DISABLED)
 169                 err = switchdev_port_obj_add(br->dev, &mrp_role.obj, NULL);
 170         else
 171                 err = switchdev_port_obj_del(br->dev, &mrp_role.obj);
 172
 173         if (!err)
 174                 return BR_MRP_SW;
 175
 176         return BR_MRP_NONE;
 177 }
 178
 179 int br_mrp_switchdev_set_in_state(struct net_bridge *br, struct br_mrp *mrp,
 180                                   enum br_mrp_in_state_type state)
 181 {
 182         struct switchdev_obj_in_state_mrp mrp_state = {
 183                 .obj.orig_dev = br->dev,
 184                 .obj.id = SWITCHDEV_OBJ_ID_IN_STATE_MRP,
 185                 .in_state = state,
 186                 .in_id = mrp->in_id,
 187         };
 188
 189         if (!IS_ENABLED(CONFIG_NET_SWITCHDEV))
 190                 return 0;
 191
 192         return switchdev_port_obj_add(br->dev, &mrp_state.obj, NULL);
 193 }
 194
 195 enum br_mrp_hw_support
 196 br_mrp_switchdev_send_in_test(struct net_bridge *br, struct br_mrp *mrp,
 197                               u32 interval, u8 max_miss, u32 period)
 198 {
 199         struct switchdev_obj_in_test_mrp test = {
 200                 .obj.orig_dev = br->dev,
 201                 .obj.id = SWITCHDEV_OBJ_ID_IN_TEST_MRP,
 202                 .interval = interval,
 203                 .max_miss = max_miss,
 204                 .in_id = mrp->in_id,
 205                 .period = period,
 206         };
 207
 208         if (!IS_ENABLED(CONFIG_NET_SWITCHDEV))
 209                 return BR_MRP_SW;
 210
 211         return br_mrp_switchdev_port_obj(br, &test.obj, interval != 0);
 212 }
 213
 214 int br_mrp_port_switchdev_set_state(struct net_bridge_port *p, u32 state)
 215 {
 216         struct switchdev_attr attr = {
 217                 .orig_dev = p->dev,
 218                 .id = SWITCHDEV_ATTR_ID_PORT_STP_STATE,
 219                 .u.stp_state = state,
 220         };
 221
 222         if (!IS_ENABLED(CONFIG_NET_SWITCHDEV))
 223                 return 0;
 224
 225         return switchdev_port_attr_set(p->dev, &attr, NULL);
 226 }
 227
 228 int br_mrp_port_switchdev_set_role(struct net_bridge_port *p,
 229                                    enum br_mrp_port_role_type role)
 230 {
 231         struct switchdev_attr attr = {
 232                 .orig_dev = p->dev,
 233                 .id = SWITCHDEV_ATTR_ID_MRP_PORT_ROLE,
 234                 .u.mrp_port_role = role,
 235         };
 236
 237         if (!IS_ENABLED(CONFIG_NET_SWITCHDEV))
 238                 return 0;
 239
 240         return switchdev_port_attr_set(p->dev, &attr, NULL);
 241 }