1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) 2018-2019, Vladimir Oltean <olteanv@gmail.com>
3 * Copyright 2020 NXP Semiconductors
4 */
5 #include "sja1105.h"
6
7 /* Since devlink regions have a fixed size and the static config has a variable
8 * size, we need to calculate the maximum possible static config size by
9 * creating a dummy config with all table entries populated to the max, and get
10 * its packed length. This is done dynamically as opposed to simply hardcoding
11 * a number, since currently not all static config tables are implemented, so
12 * we are avoiding a possible code desynchronization.
13 */
sja1105_static_config_get_max_size(struct sja1105_private * priv)14 static size_t sja1105_static_config_get_max_size(struct sja1105_private *priv)
15 {
16 struct sja1105_static_config config;
17 enum sja1105_blk_idx blk_idx;
18 int rc;
19
20 rc = sja1105_static_config_init(&config,
21 priv->info->static_ops,
22 priv->info->device_id);
23 if (rc)
24 return 0;
25
26 for (blk_idx = 0; blk_idx < BLK_IDX_MAX; blk_idx++) {
27 struct sja1105_table *table = &config.tables[blk_idx];
28
29 table->entry_count = table->ops->max_entry_count;
30 }
31
32 return sja1105_static_config_get_length(&config);
33 }
34
35 static int
sja1105_region_static_config_snapshot(struct devlink * dl,const struct devlink_region_ops * ops,struct netlink_ext_ack * extack,u8 ** data)36 sja1105_region_static_config_snapshot(struct devlink *dl,
37 const struct devlink_region_ops *ops,
38 struct netlink_ext_ack *extack,
39 u8 **data)
40 {
41 struct dsa_switch *ds = dsa_devlink_to_ds(dl);
42 struct sja1105_private *priv = ds->priv;
43 size_t max_len, len;
44
45 len = sja1105_static_config_get_length(&priv->static_config);
46 max_len = sja1105_static_config_get_max_size(priv);
47
48 *data = kcalloc(max_len, sizeof(u8), GFP_KERNEL);
49 if (!*data)
50 return -ENOMEM;
51
52 return static_config_buf_prepare_for_upload(priv, *data, len);
53 }
54
55 static struct devlink_region_ops sja1105_region_static_config_ops = {
56 .name = "static-config",
57 .snapshot = sja1105_region_static_config_snapshot,
58 .destructor = kfree,
59 };
60
61 enum sja1105_region_id {
62 SJA1105_REGION_STATIC_CONFIG = 0,
63 };
64
65 struct sja1105_region {
66 const struct devlink_region_ops *ops;
67 size_t (*get_size)(struct sja1105_private *priv);
68 };
69
70 static struct sja1105_region sja1105_regions[] = {
71 [SJA1105_REGION_STATIC_CONFIG] = {
72 .ops = &sja1105_region_static_config_ops,
73 .get_size = sja1105_static_config_get_max_size,
74 },
75 };
76
sja1105_setup_devlink_regions(struct dsa_switch * ds)77 static int sja1105_setup_devlink_regions(struct dsa_switch *ds)
78 {
79 int i, num_regions = ARRAY_SIZE(sja1105_regions);
80 struct sja1105_private *priv = ds->priv;
81 const struct devlink_region_ops *ops;
82 struct devlink_region *region;
83 u64 size;
84
85 priv->regions = kcalloc(num_regions, sizeof(struct devlink_region *),
86 GFP_KERNEL);
87 if (!priv->regions)
88 return -ENOMEM;
89
90 for (i = 0; i < num_regions; i++) {
91 size = sja1105_regions[i].get_size(priv);
92 ops = sja1105_regions[i].ops;
93
94 region = dsa_devlink_region_create(ds, ops, 1, size);
95 if (IS_ERR(region)) {
96 while (i-- >= 0)
97 dsa_devlink_region_destroy(priv->regions[i]);
98 return PTR_ERR(region);
99 }
100
101 priv->regions[i] = region;
102 }
103
104 return 0;
105 }
106
sja1105_teardown_devlink_regions(struct dsa_switch * ds)107 static void sja1105_teardown_devlink_regions(struct dsa_switch *ds)
108 {
109 int i, num_regions = ARRAY_SIZE(sja1105_regions);
110 struct sja1105_private *priv = ds->priv;
111
112 for (i = 0; i < num_regions; i++)
113 dsa_devlink_region_destroy(priv->regions[i]);
114
115 kfree(priv->regions);
116 }
117
sja1105_best_effort_vlan_filtering_get(struct sja1105_private * priv,bool * be_vlan)118 static int sja1105_best_effort_vlan_filtering_get(struct sja1105_private *priv,
119 bool *be_vlan)
120 {
121 *be_vlan = priv->best_effort_vlan_filtering;
122
123 return 0;
124 }
125
sja1105_best_effort_vlan_filtering_set(struct sja1105_private * priv,bool be_vlan)126 static int sja1105_best_effort_vlan_filtering_set(struct sja1105_private *priv,
127 bool be_vlan)
128 {
129 struct dsa_switch *ds = priv->ds;
130 bool vlan_filtering;
131 int port;
132 int rc;
133
134 priv->best_effort_vlan_filtering = be_vlan;
135
136 rtnl_lock();
137 for (port = 0; port < ds->num_ports; port++) {
138 struct switchdev_trans trans;
139 struct dsa_port *dp;
140
141 if (!dsa_is_user_port(ds, port))
142 continue;
143
144 dp = dsa_to_port(ds, port);
145 vlan_filtering = dsa_port_is_vlan_filtering(dp);
146
147 trans.ph_prepare = true;
148 rc = sja1105_vlan_filtering(ds, port, vlan_filtering, &trans);
149 if (rc)
150 break;
151
152 trans.ph_prepare = false;
153 rc = sja1105_vlan_filtering(ds, port, vlan_filtering, &trans);
154 if (rc)
155 break;
156 }
157 rtnl_unlock();
158
159 return rc;
160 }
161
162 enum sja1105_devlink_param_id {
163 SJA1105_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX,
164 SJA1105_DEVLINK_PARAM_ID_BEST_EFFORT_VLAN_FILTERING,
165 };
166
sja1105_devlink_param_get(struct dsa_switch * ds,u32 id,struct devlink_param_gset_ctx * ctx)167 int sja1105_devlink_param_get(struct dsa_switch *ds, u32 id,
168 struct devlink_param_gset_ctx *ctx)
169 {
170 struct sja1105_private *priv = ds->priv;
171 int err;
172
173 switch (id) {
174 case SJA1105_DEVLINK_PARAM_ID_BEST_EFFORT_VLAN_FILTERING:
175 err = sja1105_best_effort_vlan_filtering_get(priv,
176 &ctx->val.vbool);
177 break;
178 default:
179 err = -EOPNOTSUPP;
180 break;
181 }
182
183 return err;
184 }
185
sja1105_devlink_param_set(struct dsa_switch * ds,u32 id,struct devlink_param_gset_ctx * ctx)186 int sja1105_devlink_param_set(struct dsa_switch *ds, u32 id,
187 struct devlink_param_gset_ctx *ctx)
188 {
189 struct sja1105_private *priv = ds->priv;
190 int err;
191
192 switch (id) {
193 case SJA1105_DEVLINK_PARAM_ID_BEST_EFFORT_VLAN_FILTERING:
194 err = sja1105_best_effort_vlan_filtering_set(priv,
195 ctx->val.vbool);
196 break;
197 default:
198 err = -EOPNOTSUPP;
199 break;
200 }
201
202 return err;
203 }
204
205 static const struct devlink_param sja1105_devlink_params[] = {
206 DSA_DEVLINK_PARAM_DRIVER(SJA1105_DEVLINK_PARAM_ID_BEST_EFFORT_VLAN_FILTERING,
207 "best_effort_vlan_filtering",
208 DEVLINK_PARAM_TYPE_BOOL,
209 BIT(DEVLINK_PARAM_CMODE_RUNTIME)),
210 };
211
sja1105_setup_devlink_params(struct dsa_switch * ds)212 static int sja1105_setup_devlink_params(struct dsa_switch *ds)
213 {
214 return dsa_devlink_params_register(ds, sja1105_devlink_params,
215 ARRAY_SIZE(sja1105_devlink_params));
216 }
217
sja1105_teardown_devlink_params(struct dsa_switch * ds)218 static void sja1105_teardown_devlink_params(struct dsa_switch *ds)
219 {
220 dsa_devlink_params_unregister(ds, sja1105_devlink_params,
221 ARRAY_SIZE(sja1105_devlink_params));
222 }
223
sja1105_devlink_info_get(struct dsa_switch * ds,struct devlink_info_req * req,struct netlink_ext_ack * extack)224 int sja1105_devlink_info_get(struct dsa_switch *ds,
225 struct devlink_info_req *req,
226 struct netlink_ext_ack *extack)
227 {
228 struct sja1105_private *priv = ds->priv;
229 int rc;
230
231 rc = devlink_info_driver_name_put(req, "sja1105");
232 if (rc)
233 return rc;
234
235 rc = devlink_info_version_fixed_put(req,
236 DEVLINK_INFO_VERSION_GENERIC_ASIC_ID,
237 priv->info->name);
238 return rc;
239 }
240
sja1105_devlink_setup(struct dsa_switch * ds)241 int sja1105_devlink_setup(struct dsa_switch *ds)
242 {
243 int rc;
244
245 rc = sja1105_setup_devlink_params(ds);
246 if (rc)
247 return rc;
248
249 rc = sja1105_setup_devlink_regions(ds);
250 if (rc < 0) {
251 sja1105_teardown_devlink_params(ds);
252 return rc;
253 }
254
255 return 0;
256 }
257
sja1105_devlink_teardown(struct dsa_switch * ds)258 void sja1105_devlink_teardown(struct dsa_switch *ds)
259 {
260 sja1105_teardown_devlink_params(ds);
261 sja1105_teardown_devlink_regions(ds);
262 }
263