1 // SPDX-License-Identifier: GPL-2.0+
2
3 #include "lan966x_main.h"
4
5 #define VLANACCESS_CMD_IDLE 0
6 #define VLANACCESS_CMD_READ 1
7 #define VLANACCESS_CMD_WRITE 2
8 #define VLANACCESS_CMD_INIT 3
9
lan966x_vlan_get_status(struct lan966x * lan966x)10 static int lan966x_vlan_get_status(struct lan966x *lan966x)
11 {
12 return lan_rd(lan966x, ANA_VLANACCESS);
13 }
14
lan966x_vlan_wait_for_completion(struct lan966x * lan966x)15 static int lan966x_vlan_wait_for_completion(struct lan966x *lan966x)
16 {
17 u32 val;
18
19 return readx_poll_timeout(lan966x_vlan_get_status,
20 lan966x, val,
21 (val & ANA_VLANACCESS_VLAN_TBL_CMD) ==
22 VLANACCESS_CMD_IDLE,
23 TABLE_UPDATE_SLEEP_US, TABLE_UPDATE_TIMEOUT_US);
24 }
25
lan966x_vlan_set_mask(struct lan966x * lan966x,u16 vid)26 static void lan966x_vlan_set_mask(struct lan966x *lan966x, u16 vid)
27 {
28 u16 mask = lan966x->vlan_mask[vid];
29 bool cpu_dis;
30
31 cpu_dis = !(mask & BIT(CPU_PORT));
32
33 /* Set flags and the VID to configure */
34 lan_rmw(ANA_VLANTIDX_VLAN_PGID_CPU_DIS_SET(cpu_dis) |
35 ANA_VLANTIDX_V_INDEX_SET(vid),
36 ANA_VLANTIDX_VLAN_PGID_CPU_DIS |
37 ANA_VLANTIDX_V_INDEX,
38 lan966x, ANA_VLANTIDX);
39
40 /* Set the vlan port members mask */
41 lan_rmw(ANA_VLAN_PORT_MASK_VLAN_PORT_MASK_SET(mask),
42 ANA_VLAN_PORT_MASK_VLAN_PORT_MASK,
43 lan966x, ANA_VLAN_PORT_MASK);
44
45 /* Issue a write command */
46 lan_rmw(ANA_VLANACCESS_VLAN_TBL_CMD_SET(VLANACCESS_CMD_WRITE),
47 ANA_VLANACCESS_VLAN_TBL_CMD,
48 lan966x, ANA_VLANACCESS);
49
50 if (lan966x_vlan_wait_for_completion(lan966x))
51 dev_err(lan966x->dev, "Vlan set mask failed\n");
52 }
53
lan966x_vlan_port_add_vlan_mask(struct lan966x_port * port,u16 vid)54 static void lan966x_vlan_port_add_vlan_mask(struct lan966x_port *port, u16 vid)
55 {
56 struct lan966x *lan966x = port->lan966x;
57 u8 p = port->chip_port;
58
59 lan966x->vlan_mask[vid] |= BIT(p);
60 lan966x_vlan_set_mask(lan966x, vid);
61 }
62
lan966x_vlan_port_del_vlan_mask(struct lan966x_port * port,u16 vid)63 static void lan966x_vlan_port_del_vlan_mask(struct lan966x_port *port, u16 vid)
64 {
65 struct lan966x *lan966x = port->lan966x;
66 u8 p = port->chip_port;
67
68 lan966x->vlan_mask[vid] &= ~BIT(p);
69 lan966x_vlan_set_mask(lan966x, vid);
70 }
71
lan966x_vlan_port_any_vlan_mask(struct lan966x * lan966x,u16 vid)72 static bool lan966x_vlan_port_any_vlan_mask(struct lan966x *lan966x, u16 vid)
73 {
74 return !!(lan966x->vlan_mask[vid] & ~BIT(CPU_PORT));
75 }
76
lan966x_vlan_cpu_add_vlan_mask(struct lan966x * lan966x,u16 vid)77 static void lan966x_vlan_cpu_add_vlan_mask(struct lan966x *lan966x, u16 vid)
78 {
79 lan966x->vlan_mask[vid] |= BIT(CPU_PORT);
80 lan966x_vlan_set_mask(lan966x, vid);
81 }
82
lan966x_vlan_cpu_del_vlan_mask(struct lan966x * lan966x,u16 vid)83 static void lan966x_vlan_cpu_del_vlan_mask(struct lan966x *lan966x, u16 vid)
84 {
85 lan966x->vlan_mask[vid] &= ~BIT(CPU_PORT);
86 lan966x_vlan_set_mask(lan966x, vid);
87 }
88
lan966x_vlan_cpu_add_cpu_vlan_mask(struct lan966x * lan966x,u16 vid)89 static void lan966x_vlan_cpu_add_cpu_vlan_mask(struct lan966x *lan966x, u16 vid)
90 {
91 __set_bit(vid, lan966x->cpu_vlan_mask);
92 }
93
lan966x_vlan_cpu_del_cpu_vlan_mask(struct lan966x * lan966x,u16 vid)94 static void lan966x_vlan_cpu_del_cpu_vlan_mask(struct lan966x *lan966x, u16 vid)
95 {
96 __clear_bit(vid, lan966x->cpu_vlan_mask);
97 }
98
lan966x_vlan_cpu_member_cpu_vlan_mask(struct lan966x * lan966x,u16 vid)99 bool lan966x_vlan_cpu_member_cpu_vlan_mask(struct lan966x *lan966x, u16 vid)
100 {
101 return test_bit(vid, lan966x->cpu_vlan_mask);
102 }
103
lan966x_vlan_port_get_pvid(struct lan966x_port * port)104 static u16 lan966x_vlan_port_get_pvid(struct lan966x_port *port)
105 {
106 struct lan966x *lan966x = port->lan966x;
107
108 if (!(lan966x->bridge_mask & BIT(port->chip_port)))
109 return HOST_PVID;
110
111 return port->vlan_aware ? port->pvid : UNAWARE_PVID;
112 }
113
lan966x_vlan_port_set_vid(struct lan966x_port * port,u16 vid,bool pvid,bool untagged)114 int lan966x_vlan_port_set_vid(struct lan966x_port *port, u16 vid,
115 bool pvid, bool untagged)
116 {
117 struct lan966x *lan966x = port->lan966x;
118
119 /* Egress vlan classification */
120 if (untagged && port->vid != vid) {
121 if (port->vid) {
122 dev_err(lan966x->dev,
123 "Port already has a native VLAN: %d\n",
124 port->vid);
125 return -EBUSY;
126 }
127 port->vid = vid;
128 }
129
130 /* Default ingress vlan classification */
131 if (pvid)
132 port->pvid = vid;
133
134 return 0;
135 }
136
lan966x_vlan_port_remove_vid(struct lan966x_port * port,u16 vid)137 static void lan966x_vlan_port_remove_vid(struct lan966x_port *port, u16 vid)
138 {
139 if (port->pvid == vid)
140 port->pvid = 0;
141
142 if (port->vid == vid)
143 port->vid = 0;
144 }
145
lan966x_vlan_port_set_vlan_aware(struct lan966x_port * port,bool vlan_aware)146 void lan966x_vlan_port_set_vlan_aware(struct lan966x_port *port,
147 bool vlan_aware)
148 {
149 port->vlan_aware = vlan_aware;
150 }
151
lan966x_vlan_port_apply(struct lan966x_port * port)152 void lan966x_vlan_port_apply(struct lan966x_port *port)
153 {
154 struct lan966x *lan966x = port->lan966x;
155 u16 pvid;
156 u32 val;
157
158 pvid = lan966x_vlan_port_get_pvid(port);
159
160 /* Ingress clasification (ANA_PORT_VLAN_CFG) */
161 /* Default vlan to classify for untagged frames (may be zero) */
162 val = ANA_VLAN_CFG_VLAN_VID_SET(pvid);
163 if (port->vlan_aware)
164 val |= ANA_VLAN_CFG_VLAN_AWARE_ENA_SET(1) |
165 ANA_VLAN_CFG_VLAN_POP_CNT_SET(1);
166
167 lan_rmw(val,
168 ANA_VLAN_CFG_VLAN_VID | ANA_VLAN_CFG_VLAN_AWARE_ENA |
169 ANA_VLAN_CFG_VLAN_POP_CNT,
170 lan966x, ANA_VLAN_CFG(port->chip_port));
171
172 /* Drop frames with multicast source address */
173 val = ANA_DROP_CFG_DROP_MC_SMAC_ENA_SET(1);
174 if (port->vlan_aware && !pvid)
175 /* If port is vlan-aware and tagged, drop untagged and priority
176 * tagged frames.
177 */
178 val |= ANA_DROP_CFG_DROP_UNTAGGED_ENA_SET(1) |
179 ANA_DROP_CFG_DROP_PRIO_S_TAGGED_ENA_SET(1) |
180 ANA_DROP_CFG_DROP_PRIO_C_TAGGED_ENA_SET(1);
181
182 lan_wr(val, lan966x, ANA_DROP_CFG(port->chip_port));
183
184 /* Egress configuration (REW_TAG_CFG): VLAN tag type to 8021Q */
185 val = REW_TAG_CFG_TAG_TPID_CFG_SET(0);
186 if (port->vlan_aware) {
187 if (port->vid)
188 /* Tag all frames except when VID == DEFAULT_VLAN */
189 val |= REW_TAG_CFG_TAG_CFG_SET(1);
190 else
191 val |= REW_TAG_CFG_TAG_CFG_SET(3);
192 }
193
194 /* Update only some bits in the register */
195 lan_rmw(val,
196 REW_TAG_CFG_TAG_TPID_CFG | REW_TAG_CFG_TAG_CFG,
197 lan966x, REW_TAG_CFG(port->chip_port));
198
199 /* Set default VLAN and tag type to 8021Q */
200 lan_rmw(REW_PORT_VLAN_CFG_PORT_TPID_SET(ETH_P_8021Q) |
201 REW_PORT_VLAN_CFG_PORT_VID_SET(port->vid),
202 REW_PORT_VLAN_CFG_PORT_TPID |
203 REW_PORT_VLAN_CFG_PORT_VID,
204 lan966x, REW_PORT_VLAN_CFG(port->chip_port));
205 }
206
lan966x_vlan_port_add_vlan(struct lan966x_port * port,u16 vid,bool pvid,bool untagged)207 void lan966x_vlan_port_add_vlan(struct lan966x_port *port,
208 u16 vid,
209 bool pvid,
210 bool untagged)
211 {
212 struct lan966x *lan966x = port->lan966x;
213
214 /* If the CPU(br) is already part of the vlan then add the fdb
215 * entries in MAC table to copy the frames to the CPU(br).
216 * If the CPU(br) is not part of the vlan then it would
217 * just drop the frames.
218 */
219 if (lan966x_vlan_cpu_member_cpu_vlan_mask(lan966x, vid)) {
220 lan966x_vlan_cpu_add_vlan_mask(lan966x, vid);
221 lan966x_fdb_write_entries(lan966x, vid);
222 lan966x_mdb_write_entries(lan966x, vid);
223 }
224
225 lan966x_vlan_port_set_vid(port, vid, pvid, untagged);
226 lan966x_vlan_port_add_vlan_mask(port, vid);
227 lan966x_vlan_port_apply(port);
228 }
229
lan966x_vlan_port_del_vlan(struct lan966x_port * port,u16 vid)230 void lan966x_vlan_port_del_vlan(struct lan966x_port *port, u16 vid)
231 {
232 struct lan966x *lan966x = port->lan966x;
233
234 lan966x_vlan_port_remove_vid(port, vid);
235 lan966x_vlan_port_del_vlan_mask(port, vid);
236 lan966x_vlan_port_apply(port);
237
238 /* In case there are no other ports in vlan then remove the CPU from
239 * that vlan but still keep it in the mask because it may be needed
240 * again then another port gets added in that vlan
241 */
242 if (!lan966x_vlan_port_any_vlan_mask(lan966x, vid)) {
243 lan966x_vlan_cpu_del_vlan_mask(lan966x, vid);
244 lan966x_fdb_erase_entries(lan966x, vid);
245 lan966x_mdb_erase_entries(lan966x, vid);
246 }
247 }
248
lan966x_vlan_cpu_add_vlan(struct lan966x * lan966x,u16 vid)249 void lan966x_vlan_cpu_add_vlan(struct lan966x *lan966x, u16 vid)
250 {
251 /* Add an entry in the MAC table for the CPU
252 * Add the CPU part of the vlan only if there is another port in that
253 * vlan otherwise all the broadcast frames in that vlan will go to CPU
254 * even if none of the ports are in the vlan and then the CPU will just
255 * need to discard these frames. It is required to store this
256 * information so when a front port is added then it would add also the
257 * CPU port.
258 */
259 if (lan966x_vlan_port_any_vlan_mask(lan966x, vid)) {
260 lan966x_vlan_cpu_add_vlan_mask(lan966x, vid);
261 lan966x_mdb_write_entries(lan966x, vid);
262 }
263
264 lan966x_vlan_cpu_add_cpu_vlan_mask(lan966x, vid);
265 lan966x_fdb_write_entries(lan966x, vid);
266 }
267
lan966x_vlan_cpu_del_vlan(struct lan966x * lan966x,u16 vid)268 void lan966x_vlan_cpu_del_vlan(struct lan966x *lan966x, u16 vid)
269 {
270 /* Remove the CPU part of the vlan */
271 lan966x_vlan_cpu_del_cpu_vlan_mask(lan966x, vid);
272 lan966x_vlan_cpu_del_vlan_mask(lan966x, vid);
273 lan966x_fdb_erase_entries(lan966x, vid);
274 lan966x_mdb_erase_entries(lan966x, vid);
275 }
276
lan966x_vlan_init(struct lan966x * lan966x)277 void lan966x_vlan_init(struct lan966x *lan966x)
278 {
279 u16 port, vid;
280
281 /* Clear VLAN table, by default all ports are members of all VLANS */
282 lan_rmw(ANA_VLANACCESS_VLAN_TBL_CMD_SET(VLANACCESS_CMD_INIT),
283 ANA_VLANACCESS_VLAN_TBL_CMD,
284 lan966x, ANA_VLANACCESS);
285 lan966x_vlan_wait_for_completion(lan966x);
286
287 for (vid = 1; vid < VLAN_N_VID; vid++) {
288 lan966x->vlan_mask[vid] = 0;
289 lan966x_vlan_set_mask(lan966x, vid);
290 }
291
292 /* Set all the ports + cpu to be part of HOST_PVID and UNAWARE_PVID */
293 lan966x->vlan_mask[HOST_PVID] =
294 GENMASK(lan966x->num_phys_ports - 1, 0) | BIT(CPU_PORT);
295 lan966x_vlan_set_mask(lan966x, HOST_PVID);
296
297 lan966x->vlan_mask[UNAWARE_PVID] =
298 GENMASK(lan966x->num_phys_ports - 1, 0) | BIT(CPU_PORT);
299 lan966x_vlan_set_mask(lan966x, UNAWARE_PVID);
300
301 lan966x_vlan_cpu_add_cpu_vlan_mask(lan966x, UNAWARE_PVID);
302
303 /* Configure the CPU port to be vlan aware */
304 lan_wr(ANA_VLAN_CFG_VLAN_VID_SET(0) |
305 ANA_VLAN_CFG_VLAN_AWARE_ENA_SET(1) |
306 ANA_VLAN_CFG_VLAN_POP_CNT_SET(1),
307 lan966x, ANA_VLAN_CFG(CPU_PORT));
308
309 /* Set vlan ingress filter mask to all ports */
310 lan_wr(GENMASK(lan966x->num_phys_ports, 0),
311 lan966x, ANA_VLANMASK);
312
313 for (port = 0; port < lan966x->num_phys_ports; port++) {
314 lan_wr(0, lan966x, REW_PORT_VLAN_CFG(port));
315 lan_wr(0, lan966x, REW_TAG_CFG(port));
316 }
317 }
318