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1// SPDX-License-Identifier: (GPL-2.0 OR MIT)
2/* Microsemi Ocelot Switch driver
3 *
4 * Copyright (c) 2017, 2019 Microsemi Corporation
5 * Copyright 2020-2021 NXP
6 */
7
8#include <linux/if_bridge.h>
9#include <linux/mrp_bridge.h>
10#include <soc/mscc/ocelot_vcap.h>
11#include <uapi/linux/mrp_bridge.h>
12#include "ocelot.h"
13#include "ocelot_vcap.h"
14
15static const u8 mrp_test_dmac[] = { 0x01, 0x15, 0x4e, 0x00, 0x00, 0x01 };
16static const u8 mrp_control_dmac[] = { 0x01, 0x15, 0x4e, 0x00, 0x00, 0x02 };
17
18static int ocelot_mrp_find_partner_port(struct ocelot *ocelot,
19 struct ocelot_port *p)
20{
21 int i;
22
23 for (i = 0; i < ocelot->num_phys_ports; ++i) {
24 struct ocelot_port *ocelot_port = ocelot->ports[i];
25
26 if (!ocelot_port || p == ocelot_port)
27 continue;
28
29 if (ocelot_port->mrp_ring_id == p->mrp_ring_id)
30 return i;
31 }
32
33 return -1;
34}
35
36static int ocelot_mrp_del_vcap(struct ocelot *ocelot, int id)
37{
38 struct ocelot_vcap_block *block_vcap_is2;
39 struct ocelot_vcap_filter *filter;
40
41 block_vcap_is2 = &ocelot->block[VCAP_IS2];
42 filter = ocelot_vcap_block_find_filter_by_id(block_vcap_is2, id,
43 false);
44 if (!filter)
45 return 0;
46
47 return ocelot_vcap_filter_del(ocelot, filter);
48}
49
50static int ocelot_mrp_redirect_add_vcap(struct ocelot *ocelot, int src_port,
51 int dst_port)
52{
53 const u8 mrp_test_mask[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
54 struct ocelot_vcap_filter *filter;
55 int err;
56
57 filter = kzalloc(sizeof(*filter), GFP_KERNEL);
58 if (!filter)
59 return -ENOMEM;
60
61 filter->key_type = OCELOT_VCAP_KEY_ETYPE;
62 filter->prio = 1;
63 filter->id.cookie = OCELOT_VCAP_IS2_MRP_REDIRECT(ocelot, src_port);
64 filter->id.tc_offload = false;
65 filter->block_id = VCAP_IS2;
66 filter->type = OCELOT_VCAP_FILTER_OFFLOAD;
67 filter->ingress_port_mask = BIT(src_port);
68 ether_addr_copy(filter->key.etype.dmac.value, mrp_test_dmac);
69 ether_addr_copy(filter->key.etype.dmac.mask, mrp_test_mask);
70 filter->action.mask_mode = OCELOT_MASK_MODE_REDIRECT;
71 filter->action.port_mask = BIT(dst_port);
72
73 err = ocelot_vcap_filter_add(ocelot, filter, NULL);
74 if (err)
75 kfree(filter);
76
77 return err;
78}
79
80static void ocelot_populate_mrp_trap_key(struct ocelot_vcap_filter *filter)
81{
82 const u8 mrp_mask[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 };
83
84 /* Here is possible to use control or test dmac because the mask
85 * doesn't cover the LSB
86 */
87 ether_addr_copy(filter->key.etype.dmac.value, mrp_test_dmac);
88 ether_addr_copy(filter->key.etype.dmac.mask, mrp_mask);
89}
90
91static int ocelot_mrp_trap_add(struct ocelot *ocelot, int port)
92{
93 unsigned long cookie = OCELOT_VCAP_IS2_MRP_TRAP(ocelot);
94
95 return ocelot_trap_add(ocelot, port, cookie, false,
96 ocelot_populate_mrp_trap_key);
97}
98
99static int ocelot_mrp_trap_del(struct ocelot *ocelot, int port)
100{
101 unsigned long cookie = OCELOT_VCAP_IS2_MRP_TRAP(ocelot);
102
103 return ocelot_trap_del(ocelot, port, cookie);
104}
105
106static void ocelot_mrp_save_mac(struct ocelot *ocelot,
107 struct ocelot_port *port)
108{
109 ocelot_mact_learn(ocelot, PGID_BLACKHOLE, mrp_test_dmac,
110 OCELOT_STANDALONE_PVID, ENTRYTYPE_LOCKED);
111 ocelot_mact_learn(ocelot, PGID_BLACKHOLE, mrp_control_dmac,
112 OCELOT_STANDALONE_PVID, ENTRYTYPE_LOCKED);
113}
114
115static void ocelot_mrp_del_mac(struct ocelot *ocelot,
116 struct ocelot_port *port)
117{
118 ocelot_mact_forget(ocelot, mrp_test_dmac, OCELOT_STANDALONE_PVID);
119 ocelot_mact_forget(ocelot, mrp_control_dmac, OCELOT_STANDALONE_PVID);
120}
121
122int ocelot_mrp_add(struct ocelot *ocelot, int port,
123 const struct switchdev_obj_mrp *mrp)
124{
125 struct ocelot_port *ocelot_port = ocelot->ports[port];
126 struct ocelot_port_private *priv;
127 struct net_device *dev;
128
129 if (!ocelot_port)
130 return -EOPNOTSUPP;
131
132 priv = container_of(ocelot_port, struct ocelot_port_private, port);
133 dev = priv->dev;
134
135 if (mrp->p_port != dev && mrp->s_port != dev)
136 return 0;
137
138 ocelot_port->mrp_ring_id = mrp->ring_id;
139
140 return 0;
141}
142EXPORT_SYMBOL(ocelot_mrp_add);
143
144int ocelot_mrp_del(struct ocelot *ocelot, int port,
145 const struct switchdev_obj_mrp *mrp)
146{
147 struct ocelot_port *ocelot_port = ocelot->ports[port];
148
149 if (!ocelot_port)
150 return -EOPNOTSUPP;
151
152 if (ocelot_port->mrp_ring_id != mrp->ring_id)
153 return 0;
154
155 ocelot_port->mrp_ring_id = 0;
156
157 return 0;
158}
159EXPORT_SYMBOL(ocelot_mrp_del);
160
161int ocelot_mrp_add_ring_role(struct ocelot *ocelot, int port,
162 const struct switchdev_obj_ring_role_mrp *mrp)
163{
164 struct ocelot_port *ocelot_port = ocelot->ports[port];
165 int dst_port;
166 int err;
167
168 if (!ocelot_port)
169 return -EOPNOTSUPP;
170
171 if (mrp->ring_role != BR_MRP_RING_ROLE_MRC && !mrp->sw_backup)
172 return -EOPNOTSUPP;
173
174 if (ocelot_port->mrp_ring_id != mrp->ring_id)
175 return 0;
176
177 ocelot_mrp_save_mac(ocelot, ocelot_port);
178
179 if (mrp->ring_role != BR_MRP_RING_ROLE_MRC)
180 return ocelot_mrp_trap_add(ocelot, port);
181
182 dst_port = ocelot_mrp_find_partner_port(ocelot, ocelot_port);
183 if (dst_port == -1)
184 return -EINVAL;
185
186 err = ocelot_mrp_redirect_add_vcap(ocelot, port, dst_port);
187 if (err)
188 return err;
189
190 err = ocelot_mrp_trap_add(ocelot, port);
191 if (err) {
192 ocelot_mrp_del_vcap(ocelot,
193 OCELOT_VCAP_IS2_MRP_REDIRECT(ocelot, port));
194 return err;
195 }
196
197 return 0;
198}
199EXPORT_SYMBOL(ocelot_mrp_add_ring_role);
200
201int ocelot_mrp_del_ring_role(struct ocelot *ocelot, int port,
202 const struct switchdev_obj_ring_role_mrp *mrp)
203{
204 struct ocelot_port *ocelot_port = ocelot->ports[port];
205 int err, i;
206
207 if (!ocelot_port)
208 return -EOPNOTSUPP;
209
210 if (mrp->ring_role != BR_MRP_RING_ROLE_MRC && !mrp->sw_backup)
211 return -EOPNOTSUPP;
212
213 if (ocelot_port->mrp_ring_id != mrp->ring_id)
214 return 0;
215
216 err = ocelot_mrp_trap_del(ocelot, port);
217 if (err)
218 return err;
219
220 ocelot_mrp_del_vcap(ocelot, OCELOT_VCAP_IS2_MRP_REDIRECT(ocelot, port));
221
222 for (i = 0; i < ocelot->num_phys_ports; ++i) {
223 ocelot_port = ocelot->ports[i];
224
225 if (!ocelot_port)
226 continue;
227
228 if (ocelot_port->mrp_ring_id != 0)
229 goto out;
230 }
231
232 ocelot_mrp_del_mac(ocelot, ocelot->ports[port]);
233out:
234 return 0;
235}
236EXPORT_SYMBOL(ocelot_mrp_del_ring_role);
1// SPDX-License-Identifier: (GPL-2.0 OR MIT)
2/* Microsemi Ocelot Switch driver
3 *
4 * Copyright (c) 2017, 2019 Microsemi Corporation
5 * Copyright 2020-2021 NXP
6 */
7
8#include <linux/if_bridge.h>
9#include <linux/mrp_bridge.h>
10#include <soc/mscc/ocelot_vcap.h>
11#include <uapi/linux/mrp_bridge.h>
12#include "ocelot.h"
13#include "ocelot_vcap.h"
14
15static const u8 mrp_test_dmac[] = { 0x01, 0x15, 0x4e, 0x00, 0x00, 0x01 };
16static const u8 mrp_control_dmac[] = { 0x01, 0x15, 0x4e, 0x00, 0x00, 0x02 };
17
18static int ocelot_mrp_find_partner_port(struct ocelot *ocelot,
19 struct ocelot_port *p)
20{
21 int i;
22
23 for (i = 0; i < ocelot->num_phys_ports; ++i) {
24 struct ocelot_port *ocelot_port = ocelot->ports[i];
25
26 if (!ocelot_port || p == ocelot_port)
27 continue;
28
29 if (ocelot_port->mrp_ring_id == p->mrp_ring_id)
30 return i;
31 }
32
33 return -1;
34}
35
36static int ocelot_mrp_del_vcap(struct ocelot *ocelot, int id)
37{
38 struct ocelot_vcap_block *block_vcap_is2;
39 struct ocelot_vcap_filter *filter;
40
41 block_vcap_is2 = &ocelot->block[VCAP_IS2];
42 filter = ocelot_vcap_block_find_filter_by_id(block_vcap_is2, id,
43 false);
44 if (!filter)
45 return 0;
46
47 return ocelot_vcap_filter_del(ocelot, filter);
48}
49
50static int ocelot_mrp_redirect_add_vcap(struct ocelot *ocelot, int src_port,
51 int dst_port)
52{
53 const u8 mrp_test_mask[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
54 struct ocelot_vcap_filter *filter;
55 int err;
56
57 filter = kzalloc(sizeof(*filter), GFP_KERNEL);
58 if (!filter)
59 return -ENOMEM;
60
61 filter->key_type = OCELOT_VCAP_KEY_ETYPE;
62 filter->prio = 1;
63 filter->id.cookie = OCELOT_VCAP_IS2_MRP_REDIRECT(ocelot, src_port);
64 filter->id.tc_offload = false;
65 filter->block_id = VCAP_IS2;
66 filter->type = OCELOT_VCAP_FILTER_OFFLOAD;
67 filter->ingress_port_mask = BIT(src_port);
68 ether_addr_copy(filter->key.etype.dmac.value, mrp_test_dmac);
69 ether_addr_copy(filter->key.etype.dmac.mask, mrp_test_mask);
70 filter->action.mask_mode = OCELOT_MASK_MODE_REDIRECT;
71 filter->action.port_mask = BIT(dst_port);
72
73 err = ocelot_vcap_filter_add(ocelot, filter, NULL);
74 if (err)
75 kfree(filter);
76
77 return err;
78}
79
80static void ocelot_populate_mrp_trap_key(struct ocelot_vcap_filter *filter)
81{
82 const u8 mrp_mask[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 };
83
84 /* Here is possible to use control or test dmac because the mask
85 * doesn't cover the LSB
86 */
87 ether_addr_copy(filter->key.etype.dmac.value, mrp_test_dmac);
88 ether_addr_copy(filter->key.etype.dmac.mask, mrp_mask);
89}
90
91static int ocelot_mrp_trap_add(struct ocelot *ocelot, int port)
92{
93 unsigned long cookie = OCELOT_VCAP_IS2_MRP_TRAP(ocelot);
94
95 return ocelot_trap_add(ocelot, port, cookie, false,
96 ocelot_populate_mrp_trap_key);
97}
98
99static int ocelot_mrp_trap_del(struct ocelot *ocelot, int port)
100{
101 unsigned long cookie = OCELOT_VCAP_IS2_MRP_TRAP(ocelot);
102
103 return ocelot_trap_del(ocelot, port, cookie);
104}
105
106static void ocelot_mrp_save_mac(struct ocelot *ocelot,
107 struct ocelot_port *port)
108{
109 ocelot_mact_learn(ocelot, PGID_BLACKHOLE, mrp_test_dmac,
110 OCELOT_STANDALONE_PVID, ENTRYTYPE_LOCKED);
111 ocelot_mact_learn(ocelot, PGID_BLACKHOLE, mrp_control_dmac,
112 OCELOT_STANDALONE_PVID, ENTRYTYPE_LOCKED);
113}
114
115static void ocelot_mrp_del_mac(struct ocelot *ocelot,
116 struct ocelot_port *port)
117{
118 ocelot_mact_forget(ocelot, mrp_test_dmac, OCELOT_STANDALONE_PVID);
119 ocelot_mact_forget(ocelot, mrp_control_dmac, OCELOT_STANDALONE_PVID);
120}
121
122int ocelot_mrp_add(struct ocelot *ocelot, int port,
123 const struct switchdev_obj_mrp *mrp)
124{
125 struct ocelot_port *ocelot_port = ocelot->ports[port];
126 struct ocelot_port_private *priv;
127 struct net_device *dev;
128
129 if (!ocelot_port)
130 return -EOPNOTSUPP;
131
132 priv = container_of(ocelot_port, struct ocelot_port_private, port);
133 dev = priv->dev;
134
135 if (mrp->p_port != dev && mrp->s_port != dev)
136 return 0;
137
138 ocelot_port->mrp_ring_id = mrp->ring_id;
139
140 return 0;
141}
142EXPORT_SYMBOL(ocelot_mrp_add);
143
144int ocelot_mrp_del(struct ocelot *ocelot, int port,
145 const struct switchdev_obj_mrp *mrp)
146{
147 struct ocelot_port *ocelot_port = ocelot->ports[port];
148
149 if (!ocelot_port)
150 return -EOPNOTSUPP;
151
152 if (ocelot_port->mrp_ring_id != mrp->ring_id)
153 return 0;
154
155 ocelot_port->mrp_ring_id = 0;
156
157 return 0;
158}
159EXPORT_SYMBOL(ocelot_mrp_del);
160
161int ocelot_mrp_add_ring_role(struct ocelot *ocelot, int port,
162 const struct switchdev_obj_ring_role_mrp *mrp)
163{
164 struct ocelot_port *ocelot_port = ocelot->ports[port];
165 int dst_port;
166 int err;
167
168 if (!ocelot_port)
169 return -EOPNOTSUPP;
170
171 if (mrp->ring_role != BR_MRP_RING_ROLE_MRC && !mrp->sw_backup)
172 return -EOPNOTSUPP;
173
174 if (ocelot_port->mrp_ring_id != mrp->ring_id)
175 return 0;
176
177 ocelot_mrp_save_mac(ocelot, ocelot_port);
178
179 if (mrp->ring_role != BR_MRP_RING_ROLE_MRC)
180 return ocelot_mrp_trap_add(ocelot, port);
181
182 dst_port = ocelot_mrp_find_partner_port(ocelot, ocelot_port);
183 if (dst_port == -1)
184 return -EINVAL;
185
186 err = ocelot_mrp_redirect_add_vcap(ocelot, port, dst_port);
187 if (err)
188 return err;
189
190 err = ocelot_mrp_trap_add(ocelot, port);
191 if (err) {
192 ocelot_mrp_del_vcap(ocelot,
193 OCELOT_VCAP_IS2_MRP_REDIRECT(ocelot, port));
194 return err;
195 }
196
197 return 0;
198}
199EXPORT_SYMBOL(ocelot_mrp_add_ring_role);
200
201int ocelot_mrp_del_ring_role(struct ocelot *ocelot, int port,
202 const struct switchdev_obj_ring_role_mrp *mrp)
203{
204 struct ocelot_port *ocelot_port = ocelot->ports[port];
205 int err, i;
206
207 if (!ocelot_port)
208 return -EOPNOTSUPP;
209
210 if (mrp->ring_role != BR_MRP_RING_ROLE_MRC && !mrp->sw_backup)
211 return -EOPNOTSUPP;
212
213 if (ocelot_port->mrp_ring_id != mrp->ring_id)
214 return 0;
215
216 err = ocelot_mrp_trap_del(ocelot, port);
217 if (err)
218 return err;
219
220 ocelot_mrp_del_vcap(ocelot, OCELOT_VCAP_IS2_MRP_REDIRECT(ocelot, port));
221
222 for (i = 0; i < ocelot->num_phys_ports; ++i) {
223 ocelot_port = ocelot->ports[i];
224
225 if (!ocelot_port)
226 continue;
227
228 if (ocelot_port->mrp_ring_id != 0)
229 goto out;
230 }
231
232 ocelot_mrp_del_mac(ocelot, ocelot->ports[port]);
233out:
234 return 0;
235}
236EXPORT_SYMBOL(ocelot_mrp_del_ring_role);