1 // SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
2 #include "dpaa2-eth.h"
3 /* Copyright 2020 NXP
4 */
5
6 #define DPAA2_ETH_TRAP_DROP(_id, _group_id) \
7 DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \
8 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, 0)
9
10 static const struct devlink_trap_group dpaa2_eth_trap_groups_arr[] = {
11 DEVLINK_TRAP_GROUP_GENERIC(PARSER_ERROR_DROPS, 0),
12 };
13
14 static const struct devlink_trap dpaa2_eth_traps_arr[] = {
15 DPAA2_ETH_TRAP_DROP(VXLAN_PARSING, PARSER_ERROR_DROPS),
16 DPAA2_ETH_TRAP_DROP(LLC_SNAP_PARSING, PARSER_ERROR_DROPS),
17 DPAA2_ETH_TRAP_DROP(VLAN_PARSING, PARSER_ERROR_DROPS),
18 DPAA2_ETH_TRAP_DROP(PPPOE_PPP_PARSING, PARSER_ERROR_DROPS),
19 DPAA2_ETH_TRAP_DROP(MPLS_PARSING, PARSER_ERROR_DROPS),
20 DPAA2_ETH_TRAP_DROP(ARP_PARSING, PARSER_ERROR_DROPS),
21 DPAA2_ETH_TRAP_DROP(IP_1_PARSING, PARSER_ERROR_DROPS),
22 DPAA2_ETH_TRAP_DROP(IP_N_PARSING, PARSER_ERROR_DROPS),
23 DPAA2_ETH_TRAP_DROP(GRE_PARSING, PARSER_ERROR_DROPS),
24 DPAA2_ETH_TRAP_DROP(UDP_PARSING, PARSER_ERROR_DROPS),
25 DPAA2_ETH_TRAP_DROP(TCP_PARSING, PARSER_ERROR_DROPS),
26 DPAA2_ETH_TRAP_DROP(IPSEC_PARSING, PARSER_ERROR_DROPS),
27 DPAA2_ETH_TRAP_DROP(SCTP_PARSING, PARSER_ERROR_DROPS),
28 DPAA2_ETH_TRAP_DROP(DCCP_PARSING, PARSER_ERROR_DROPS),
29 DPAA2_ETH_TRAP_DROP(GTP_PARSING, PARSER_ERROR_DROPS),
30 DPAA2_ETH_TRAP_DROP(ESP_PARSING, PARSER_ERROR_DROPS),
31 };
32
dpaa2_eth_dl_info_get(struct devlink * devlink,struct devlink_info_req * req,struct netlink_ext_ack * extack)33 static int dpaa2_eth_dl_info_get(struct devlink *devlink,
34 struct devlink_info_req *req,
35 struct netlink_ext_ack *extack)
36 {
37 struct dpaa2_eth_devlink_priv *dl_priv = devlink_priv(devlink);
38 struct dpaa2_eth_priv *priv = dl_priv->dpaa2_priv;
39 char buf[10];
40
41 scnprintf(buf, 10, "%d.%d", priv->dpni_ver_major, priv->dpni_ver_minor);
42 return devlink_info_version_running_put(req, "dpni", buf);
43 }
44
45 static struct dpaa2_eth_trap_item *
dpaa2_eth_dl_trap_item_lookup(struct dpaa2_eth_priv * priv,u16 trap_id)46 dpaa2_eth_dl_trap_item_lookup(struct dpaa2_eth_priv *priv, u16 trap_id)
47 {
48 struct dpaa2_eth_trap_data *dpaa2_eth_trap_data = priv->trap_data;
49 int i;
50
51 for (i = 0; i < ARRAY_SIZE(dpaa2_eth_traps_arr); i++) {
52 if (dpaa2_eth_traps_arr[i].id == trap_id)
53 return &dpaa2_eth_trap_data->trap_items_arr[i];
54 }
55
56 return NULL;
57 }
58
dpaa2_eth_dl_get_trap(struct dpaa2_eth_priv * priv,struct dpaa2_fapr * fapr)59 struct dpaa2_eth_trap_item *dpaa2_eth_dl_get_trap(struct dpaa2_eth_priv *priv,
60 struct dpaa2_fapr *fapr)
61 {
62 static const struct dpaa2_faf_error_bit {
63 int position;
64 enum devlink_trap_generic_id trap_id;
65 } faf_bits[] = {
66 { .position = 5, .trap_id = DEVLINK_TRAP_GENERIC_ID_VXLAN_PARSING },
67 { .position = 20, .trap_id = DEVLINK_TRAP_GENERIC_ID_LLC_SNAP_PARSING },
68 { .position = 24, .trap_id = DEVLINK_TRAP_GENERIC_ID_VLAN_PARSING },
69 { .position = 26, .trap_id = DEVLINK_TRAP_GENERIC_ID_PPPOE_PPP_PARSING },
70 { .position = 29, .trap_id = DEVLINK_TRAP_GENERIC_ID_MPLS_PARSING },
71 { .position = 31, .trap_id = DEVLINK_TRAP_GENERIC_ID_ARP_PARSING },
72 { .position = 52, .trap_id = DEVLINK_TRAP_GENERIC_ID_IP_1_PARSING },
73 { .position = 61, .trap_id = DEVLINK_TRAP_GENERIC_ID_IP_N_PARSING },
74 { .position = 67, .trap_id = DEVLINK_TRAP_GENERIC_ID_GRE_PARSING },
75 { .position = 71, .trap_id = DEVLINK_TRAP_GENERIC_ID_UDP_PARSING },
76 { .position = 76, .trap_id = DEVLINK_TRAP_GENERIC_ID_TCP_PARSING },
77 { .position = 80, .trap_id = DEVLINK_TRAP_GENERIC_ID_IPSEC_PARSING },
78 { .position = 82, .trap_id = DEVLINK_TRAP_GENERIC_ID_SCTP_PARSING },
79 { .position = 84, .trap_id = DEVLINK_TRAP_GENERIC_ID_DCCP_PARSING },
80 { .position = 88, .trap_id = DEVLINK_TRAP_GENERIC_ID_GTP_PARSING },
81 { .position = 90, .trap_id = DEVLINK_TRAP_GENERIC_ID_ESP_PARSING },
82 };
83 u64 faf_word;
84 u64 mask;
85 int i;
86
87 for (i = 0; i < ARRAY_SIZE(faf_bits); i++) {
88 if (faf_bits[i].position < 32) {
89 /* Low part of FAF.
90 * position ranges from 31 to 0, mask from 0 to 31.
91 */
92 mask = 1ull << (31 - faf_bits[i].position);
93 faf_word = __le32_to_cpu(fapr->faf_lo);
94 } else {
95 /* High part of FAF.
96 * position ranges from 95 to 32, mask from 0 to 63.
97 */
98 mask = 1ull << (63 - (faf_bits[i].position - 32));
99 faf_word = __le64_to_cpu(fapr->faf_hi);
100 }
101 if (faf_word & mask)
102 return dpaa2_eth_dl_trap_item_lookup(priv, faf_bits[i].trap_id);
103 }
104 return NULL;
105 }
106
dpaa2_eth_dl_trap_init(struct devlink * devlink,const struct devlink_trap * trap,void * trap_ctx)107 static int dpaa2_eth_dl_trap_init(struct devlink *devlink,
108 const struct devlink_trap *trap,
109 void *trap_ctx)
110 {
111 struct dpaa2_eth_devlink_priv *dl_priv = devlink_priv(devlink);
112 struct dpaa2_eth_priv *priv = dl_priv->dpaa2_priv;
113 struct dpaa2_eth_trap_item *dpaa2_eth_trap_item;
114
115 dpaa2_eth_trap_item = dpaa2_eth_dl_trap_item_lookup(priv, trap->id);
116 if (WARN_ON(!dpaa2_eth_trap_item))
117 return -ENOENT;
118
119 dpaa2_eth_trap_item->trap_ctx = trap_ctx;
120
121 return 0;
122 }
123
dpaa2_eth_dl_trap_action_set(struct devlink * devlink,const struct devlink_trap * trap,enum devlink_trap_action action,struct netlink_ext_ack * extack)124 static int dpaa2_eth_dl_trap_action_set(struct devlink *devlink,
125 const struct devlink_trap *trap,
126 enum devlink_trap_action action,
127 struct netlink_ext_ack *extack)
128 {
129 /* No support for changing the action of an independent packet trap,
130 * only per trap group - parser error drops
131 */
132 NL_SET_ERR_MSG_MOD(extack,
133 "Cannot change trap action independently of group");
134 return -EOPNOTSUPP;
135 }
136
dpaa2_eth_dl_trap_group_action_set(struct devlink * devlink,const struct devlink_trap_group * group,enum devlink_trap_action action,struct netlink_ext_ack * extack)137 static int dpaa2_eth_dl_trap_group_action_set(struct devlink *devlink,
138 const struct devlink_trap_group *group,
139 enum devlink_trap_action action,
140 struct netlink_ext_ack *extack)
141 {
142 struct dpaa2_eth_devlink_priv *dl_priv = devlink_priv(devlink);
143 struct dpaa2_eth_priv *priv = dl_priv->dpaa2_priv;
144 struct net_device *net_dev = priv->net_dev;
145 struct device *dev = net_dev->dev.parent;
146 struct dpni_error_cfg err_cfg = {0};
147 int err;
148
149 if (group->id != DEVLINK_TRAP_GROUP_GENERIC_ID_PARSER_ERROR_DROPS)
150 return -EOPNOTSUPP;
151
152 /* Configure handling of frames marked as errors from the parser */
153 err_cfg.errors = DPAA2_FAS_RX_ERR_MASK;
154 err_cfg.set_frame_annotation = 1;
155
156 switch (action) {
157 case DEVLINK_TRAP_ACTION_DROP:
158 err_cfg.error_action = DPNI_ERROR_ACTION_DISCARD;
159 break;
160 case DEVLINK_TRAP_ACTION_TRAP:
161 err_cfg.error_action = DPNI_ERROR_ACTION_SEND_TO_ERROR_QUEUE;
162 break;
163 default:
164 return -EOPNOTSUPP;
165 }
166
167 err = dpni_set_errors_behavior(priv->mc_io, 0, priv->mc_token, &err_cfg);
168 if (err) {
169 dev_err(dev, "dpni_set_errors_behavior failed\n");
170 return err;
171 }
172
173 return 0;
174 }
175
176 static const struct devlink_ops dpaa2_eth_devlink_ops = {
177 .info_get = dpaa2_eth_dl_info_get,
178 .trap_init = dpaa2_eth_dl_trap_init,
179 .trap_action_set = dpaa2_eth_dl_trap_action_set,
180 .trap_group_action_set = dpaa2_eth_dl_trap_group_action_set,
181 };
182
dpaa2_eth_dl_alloc(struct dpaa2_eth_priv * priv)183 int dpaa2_eth_dl_alloc(struct dpaa2_eth_priv *priv)
184 {
185 struct net_device *net_dev = priv->net_dev;
186 struct device *dev = net_dev->dev.parent;
187 struct dpaa2_eth_devlink_priv *dl_priv;
188
189 priv->devlink =
190 devlink_alloc(&dpaa2_eth_devlink_ops, sizeof(*dl_priv), dev);
191 if (!priv->devlink) {
192 dev_err(dev, "devlink_alloc failed\n");
193 return -ENOMEM;
194 }
195 dl_priv = devlink_priv(priv->devlink);
196 dl_priv->dpaa2_priv = priv;
197 return 0;
198 }
199
dpaa2_eth_dl_free(struct dpaa2_eth_priv * priv)200 void dpaa2_eth_dl_free(struct dpaa2_eth_priv *priv)
201 {
202 devlink_free(priv->devlink);
203 }
204
205
dpaa2_eth_dl_register(struct dpaa2_eth_priv * priv)206 void dpaa2_eth_dl_register(struct dpaa2_eth_priv *priv)
207 {
208 devlink_register(priv->devlink);
209 }
210
dpaa2_eth_dl_unregister(struct dpaa2_eth_priv * priv)211 void dpaa2_eth_dl_unregister(struct dpaa2_eth_priv *priv)
212 {
213 devlink_unregister(priv->devlink);
214 }
215
dpaa2_eth_dl_port_add(struct dpaa2_eth_priv * priv)216 int dpaa2_eth_dl_port_add(struct dpaa2_eth_priv *priv)
217 {
218 struct devlink_port *devlink_port = &priv->devlink_port;
219 struct devlink_port_attrs attrs = {};
220
221 attrs.flavour = DEVLINK_PORT_FLAVOUR_PHYSICAL;
222 devlink_port_attrs_set(devlink_port, &attrs);
223 return devlink_port_register(priv->devlink, devlink_port, 0);
224 }
225
dpaa2_eth_dl_port_del(struct dpaa2_eth_priv * priv)226 void dpaa2_eth_dl_port_del(struct dpaa2_eth_priv *priv)
227 {
228 struct devlink_port *devlink_port = &priv->devlink_port;
229
230 devlink_port_unregister(devlink_port);
231 }
232
dpaa2_eth_dl_traps_register(struct dpaa2_eth_priv * priv)233 int dpaa2_eth_dl_traps_register(struct dpaa2_eth_priv *priv)
234 {
235 struct dpaa2_eth_trap_data *dpaa2_eth_trap_data;
236 struct net_device *net_dev = priv->net_dev;
237 struct device *dev = net_dev->dev.parent;
238 int err;
239
240 dpaa2_eth_trap_data = kzalloc(sizeof(*dpaa2_eth_trap_data), GFP_KERNEL);
241 if (!dpaa2_eth_trap_data)
242 return -ENOMEM;
243 priv->trap_data = dpaa2_eth_trap_data;
244
245 dpaa2_eth_trap_data->trap_items_arr = kcalloc(ARRAY_SIZE(dpaa2_eth_traps_arr),
246 sizeof(struct dpaa2_eth_trap_item),
247 GFP_KERNEL);
248 if (!dpaa2_eth_trap_data->trap_items_arr) {
249 err = -ENOMEM;
250 goto trap_data_free;
251 }
252
253 err = devlink_trap_groups_register(priv->devlink, dpaa2_eth_trap_groups_arr,
254 ARRAY_SIZE(dpaa2_eth_trap_groups_arr));
255 if (err) {
256 dev_err(dev, "devlink_trap_groups_register() = %d\n", err);
257 goto trap_items_arr_free;
258 }
259
260 err = devlink_traps_register(priv->devlink, dpaa2_eth_traps_arr,
261 ARRAY_SIZE(dpaa2_eth_traps_arr), priv);
262 if (err) {
263 dev_err(dev, "devlink_traps_register() = %d\n", err);
264 goto trap_groups_unregiser;
265 }
266
267 return 0;
268
269 trap_groups_unregiser:
270 devlink_trap_groups_unregister(priv->devlink, dpaa2_eth_trap_groups_arr,
271 ARRAY_SIZE(dpaa2_eth_trap_groups_arr));
272 trap_items_arr_free:
273 kfree(dpaa2_eth_trap_data->trap_items_arr);
274 trap_data_free:
275 kfree(dpaa2_eth_trap_data);
276 priv->trap_data = NULL;
277
278 return err;
279 }
280
dpaa2_eth_dl_traps_unregister(struct dpaa2_eth_priv * priv)281 void dpaa2_eth_dl_traps_unregister(struct dpaa2_eth_priv *priv)
282 {
283 devlink_traps_unregister(priv->devlink, dpaa2_eth_traps_arr,
284 ARRAY_SIZE(dpaa2_eth_traps_arr));
285 devlink_trap_groups_unregister(priv->devlink, dpaa2_eth_trap_groups_arr,
286 ARRAY_SIZE(dpaa2_eth_trap_groups_arr));
287 kfree(priv->trap_data->trap_items_arr);
288 kfree(priv->trap_data);
289 }
290