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 }
242
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