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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
10static const struct devlink_trap_group dpaa2_eth_trap_groups_arr[] = {
11 DEVLINK_TRAP_GROUP_GENERIC(PARSER_ERROR_DROPS, 0),
12};
13
14static 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
33static 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 int err;
41
42 err = devlink_info_driver_name_put(req, KBUILD_MODNAME);
43 if (err)
44 return err;
45
46 scnprintf(buf, 10, "%d.%d", priv->dpni_ver_major, priv->dpni_ver_minor);
47 err = devlink_info_version_running_put(req, "dpni", buf);
48 if (err)
49 return err;
50
51 return 0;
52}
53
54static struct dpaa2_eth_trap_item *
55dpaa2_eth_dl_trap_item_lookup(struct dpaa2_eth_priv *priv, u16 trap_id)
56{
57 struct dpaa2_eth_trap_data *dpaa2_eth_trap_data = priv->trap_data;
58 int i;
59
60 for (i = 0; i < ARRAY_SIZE(dpaa2_eth_traps_arr); i++) {
61 if (dpaa2_eth_traps_arr[i].id == trap_id)
62 return &dpaa2_eth_trap_data->trap_items_arr[i];
63 }
64
65 return NULL;
66}
67
68struct dpaa2_eth_trap_item *dpaa2_eth_dl_get_trap(struct dpaa2_eth_priv *priv,
69 struct dpaa2_fapr *fapr)
70{
71 struct dpaa2_faf_error_bit {
72 int position;
73 enum devlink_trap_generic_id trap_id;
74 } faf_bits[] = {
75 { .position = 5, .trap_id = DEVLINK_TRAP_GENERIC_ID_VXLAN_PARSING },
76 { .position = 20, .trap_id = DEVLINK_TRAP_GENERIC_ID_LLC_SNAP_PARSING },
77 { .position = 24, .trap_id = DEVLINK_TRAP_GENERIC_ID_VLAN_PARSING },
78 { .position = 26, .trap_id = DEVLINK_TRAP_GENERIC_ID_PPPOE_PPP_PARSING },
79 { .position = 29, .trap_id = DEVLINK_TRAP_GENERIC_ID_MPLS_PARSING },
80 { .position = 31, .trap_id = DEVLINK_TRAP_GENERIC_ID_ARP_PARSING },
81 { .position = 52, .trap_id = DEVLINK_TRAP_GENERIC_ID_IP_1_PARSING },
82 { .position = 61, .trap_id = DEVLINK_TRAP_GENERIC_ID_IP_N_PARSING },
83 { .position = 67, .trap_id = DEVLINK_TRAP_GENERIC_ID_GRE_PARSING },
84 { .position = 71, .trap_id = DEVLINK_TRAP_GENERIC_ID_UDP_PARSING },
85 { .position = 76, .trap_id = DEVLINK_TRAP_GENERIC_ID_TCP_PARSING },
86 { .position = 80, .trap_id = DEVLINK_TRAP_GENERIC_ID_IPSEC_PARSING },
87 { .position = 82, .trap_id = DEVLINK_TRAP_GENERIC_ID_SCTP_PARSING },
88 { .position = 84, .trap_id = DEVLINK_TRAP_GENERIC_ID_DCCP_PARSING },
89 { .position = 88, .trap_id = DEVLINK_TRAP_GENERIC_ID_GTP_PARSING },
90 { .position = 90, .trap_id = DEVLINK_TRAP_GENERIC_ID_ESP_PARSING },
91 };
92 u64 faf_word;
93 u64 mask;
94 int i;
95
96 for (i = 0; i < ARRAY_SIZE(faf_bits); i++) {
97 if (faf_bits[i].position < 32) {
98 /* Low part of FAF.
99 * position ranges from 31 to 0, mask from 0 to 31.
100 */
101 mask = 1ull << (31 - faf_bits[i].position);
102 faf_word = __le32_to_cpu(fapr->faf_lo);
103 } else {
104 /* High part of FAF.
105 * position ranges from 95 to 32, mask from 0 to 63.
106 */
107 mask = 1ull << (63 - (faf_bits[i].position - 32));
108 faf_word = __le64_to_cpu(fapr->faf_hi);
109 }
110 if (faf_word & mask)
111 return dpaa2_eth_dl_trap_item_lookup(priv, faf_bits[i].trap_id);
112 }
113 return NULL;
114}
115
116static int dpaa2_eth_dl_trap_init(struct devlink *devlink,
117 const struct devlink_trap *trap,
118 void *trap_ctx)
119{
120 struct dpaa2_eth_devlink_priv *dl_priv = devlink_priv(devlink);
121 struct dpaa2_eth_priv *priv = dl_priv->dpaa2_priv;
122 struct dpaa2_eth_trap_item *dpaa2_eth_trap_item;
123
124 dpaa2_eth_trap_item = dpaa2_eth_dl_trap_item_lookup(priv, trap->id);
125 if (WARN_ON(!dpaa2_eth_trap_item))
126 return -ENOENT;
127
128 dpaa2_eth_trap_item->trap_ctx = trap_ctx;
129
130 return 0;
131}
132
133static int dpaa2_eth_dl_trap_action_set(struct devlink *devlink,
134 const struct devlink_trap *trap,
135 enum devlink_trap_action action,
136 struct netlink_ext_ack *extack)
137{
138 /* No support for changing the action of an independent packet trap,
139 * only per trap group - parser error drops
140 */
141 NL_SET_ERR_MSG_MOD(extack,
142 "Cannot change trap action independently of group");
143 return -EOPNOTSUPP;
144}
145
146static int dpaa2_eth_dl_trap_group_action_set(struct devlink *devlink,
147 const struct devlink_trap_group *group,
148 enum devlink_trap_action action,
149 struct netlink_ext_ack *extack)
150{
151 struct dpaa2_eth_devlink_priv *dl_priv = devlink_priv(devlink);
152 struct dpaa2_eth_priv *priv = dl_priv->dpaa2_priv;
153 struct net_device *net_dev = priv->net_dev;
154 struct device *dev = net_dev->dev.parent;
155 struct dpni_error_cfg err_cfg = {0};
156 int err;
157
158 if (group->id != DEVLINK_TRAP_GROUP_GENERIC_ID_PARSER_ERROR_DROPS)
159 return -EOPNOTSUPP;
160
161 /* Configure handling of frames marked as errors from the parser */
162 err_cfg.errors = DPAA2_FAS_RX_ERR_MASK;
163 err_cfg.set_frame_annotation = 1;
164
165 switch (action) {
166 case DEVLINK_TRAP_ACTION_DROP:
167 err_cfg.error_action = DPNI_ERROR_ACTION_DISCARD;
168 break;
169 case DEVLINK_TRAP_ACTION_TRAP:
170 err_cfg.error_action = DPNI_ERROR_ACTION_SEND_TO_ERROR_QUEUE;
171 break;
172 default:
173 return -EOPNOTSUPP;
174 }
175
176 err = dpni_set_errors_behavior(priv->mc_io, 0, priv->mc_token, &err_cfg);
177 if (err) {
178 dev_err(dev, "dpni_set_errors_behavior failed\n");
179 return err;
180 }
181
182 return 0;
183}
184
185static const struct devlink_ops dpaa2_eth_devlink_ops = {
186 .info_get = dpaa2_eth_dl_info_get,
187 .trap_init = dpaa2_eth_dl_trap_init,
188 .trap_action_set = dpaa2_eth_dl_trap_action_set,
189 .trap_group_action_set = dpaa2_eth_dl_trap_group_action_set,
190};
191
192int dpaa2_eth_dl_register(struct dpaa2_eth_priv *priv)
193{
194 struct net_device *net_dev = priv->net_dev;
195 struct device *dev = net_dev->dev.parent;
196 struct dpaa2_eth_devlink_priv *dl_priv;
197 int err;
198
199 priv->devlink = devlink_alloc(&dpaa2_eth_devlink_ops, sizeof(*dl_priv));
200 if (!priv->devlink) {
201 dev_err(dev, "devlink_alloc failed\n");
202 return -ENOMEM;
203 }
204 dl_priv = devlink_priv(priv->devlink);
205 dl_priv->dpaa2_priv = priv;
206
207 err = devlink_register(priv->devlink, dev);
208 if (err) {
209 dev_err(dev, "devlink_register() = %d\n", err);
210 goto devlink_free;
211 }
212
213 return 0;
214
215devlink_free:
216 devlink_free(priv->devlink);
217
218 return err;
219}
220
221void dpaa2_eth_dl_unregister(struct dpaa2_eth_priv *priv)
222{
223 devlink_unregister(priv->devlink);
224 devlink_free(priv->devlink);
225}
226
227int dpaa2_eth_dl_port_add(struct dpaa2_eth_priv *priv)
228{
229 struct devlink_port *devlink_port = &priv->devlink_port;
230 struct devlink_port_attrs attrs = {};
231 int err;
232
233 attrs.flavour = DEVLINK_PORT_FLAVOUR_PHYSICAL;
234 devlink_port_attrs_set(devlink_port, &attrs);
235
236 err = devlink_port_register(priv->devlink, devlink_port, 0);
237 if (err)
238 return err;
239
240 devlink_port_type_eth_set(devlink_port, priv->net_dev);
241
242 return 0;
243}
244
245void dpaa2_eth_dl_port_del(struct dpaa2_eth_priv *priv)
246{
247 struct devlink_port *devlink_port = &priv->devlink_port;
248
249 devlink_port_type_clear(devlink_port);
250 devlink_port_unregister(devlink_port);
251}
252
253int dpaa2_eth_dl_traps_register(struct dpaa2_eth_priv *priv)
254{
255 struct dpaa2_eth_trap_data *dpaa2_eth_trap_data;
256 struct net_device *net_dev = priv->net_dev;
257 struct device *dev = net_dev->dev.parent;
258 int err;
259
260 dpaa2_eth_trap_data = kzalloc(sizeof(*dpaa2_eth_trap_data), GFP_KERNEL);
261 if (!dpaa2_eth_trap_data)
262 return -ENOMEM;
263 priv->trap_data = dpaa2_eth_trap_data;
264
265 dpaa2_eth_trap_data->trap_items_arr = kcalloc(ARRAY_SIZE(dpaa2_eth_traps_arr),
266 sizeof(struct dpaa2_eth_trap_item),
267 GFP_KERNEL);
268 if (!dpaa2_eth_trap_data->trap_items_arr) {
269 err = -ENOMEM;
270 goto trap_data_free;
271 }
272
273 err = devlink_trap_groups_register(priv->devlink, dpaa2_eth_trap_groups_arr,
274 ARRAY_SIZE(dpaa2_eth_trap_groups_arr));
275 if (err) {
276 dev_err(dev, "devlink_trap_groups_register() = %d\n", err);
277 goto trap_items_arr_free;
278 }
279
280 err = devlink_traps_register(priv->devlink, dpaa2_eth_traps_arr,
281 ARRAY_SIZE(dpaa2_eth_traps_arr), priv);
282 if (err) {
283 dev_err(dev, "devlink_traps_register() = %d\n", err);
284 goto trap_groups_unregiser;
285 }
286
287 return 0;
288
289trap_groups_unregiser:
290 devlink_trap_groups_unregister(priv->devlink, dpaa2_eth_trap_groups_arr,
291 ARRAY_SIZE(dpaa2_eth_trap_groups_arr));
292trap_items_arr_free:
293 kfree(dpaa2_eth_trap_data->trap_items_arr);
294trap_data_free:
295 kfree(dpaa2_eth_trap_data);
296 priv->trap_data = NULL;
297
298 return err;
299}
300
301void dpaa2_eth_dl_traps_unregister(struct dpaa2_eth_priv *priv)
302{
303 devlink_traps_unregister(priv->devlink, dpaa2_eth_traps_arr,
304 ARRAY_SIZE(dpaa2_eth_traps_arr));
305 devlink_trap_groups_unregister(priv->devlink, dpaa2_eth_trap_groups_arr,
306 ARRAY_SIZE(dpaa2_eth_trap_groups_arr));
307 kfree(priv->trap_data->trap_items_arr);
308 kfree(priv->trap_data);
309}