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eec1e5ea JP |
1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* | |
3 | * Copyright (c) 2016 Mellanox Technologies. All rights reserved. | |
4 | * Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com> | |
5 | */ | |
6 | ||
7 | #include "devl_internal.h" | |
8 | ||
9 | #define DEVLINK_PORT_FN_CAPS_VALID_MASK \ | |
10 | (_BITUL(__DEVLINK_PORT_FN_ATTR_CAPS_MAX) - 1) | |
11 | ||
12 | static const struct nla_policy devlink_function_nl_policy[DEVLINK_PORT_FUNCTION_ATTR_MAX + 1] = { | |
13 | [DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR] = { .type = NLA_BINARY }, | |
14 | [DEVLINK_PORT_FN_ATTR_STATE] = | |
15 | NLA_POLICY_RANGE(NLA_U8, DEVLINK_PORT_FN_STATE_INACTIVE, | |
16 | DEVLINK_PORT_FN_STATE_ACTIVE), | |
17 | [DEVLINK_PORT_FN_ATTR_CAPS] = | |
18 | NLA_POLICY_BITFIELD32(DEVLINK_PORT_FN_CAPS_VALID_MASK), | |
19 | }; | |
20 | ||
21 | #define ASSERT_DEVLINK_PORT_REGISTERED(devlink_port) \ | |
22 | WARN_ON_ONCE(!(devlink_port)->registered) | |
23 | #define ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port) \ | |
24 | WARN_ON_ONCE((devlink_port)->registered) | |
25 | ||
26 | struct devlink_port *devlink_port_get_by_index(struct devlink *devlink, | |
27 | unsigned int port_index) | |
28 | { | |
29 | return xa_load(&devlink->ports, port_index); | |
30 | } | |
31 | ||
32 | struct devlink_port *devlink_port_get_from_attrs(struct devlink *devlink, | |
33 | struct nlattr **attrs) | |
34 | { | |
35 | if (attrs[DEVLINK_ATTR_PORT_INDEX]) { | |
36 | u32 port_index = nla_get_u32(attrs[DEVLINK_ATTR_PORT_INDEX]); | |
37 | struct devlink_port *devlink_port; | |
38 | ||
39 | devlink_port = devlink_port_get_by_index(devlink, port_index); | |
40 | if (!devlink_port) | |
41 | return ERR_PTR(-ENODEV); | |
42 | return devlink_port; | |
43 | } | |
44 | return ERR_PTR(-EINVAL); | |
45 | } | |
46 | ||
47 | struct devlink_port *devlink_port_get_from_info(struct devlink *devlink, | |
48 | struct genl_info *info) | |
49 | { | |
50 | return devlink_port_get_from_attrs(devlink, info->attrs); | |
51 | } | |
52 | ||
53 | static void devlink_port_fn_cap_fill(struct nla_bitfield32 *caps, | |
54 | u32 cap, bool is_enable) | |
55 | { | |
56 | caps->selector |= cap; | |
57 | if (is_enable) | |
58 | caps->value |= cap; | |
59 | } | |
60 | ||
61 | static int devlink_port_fn_roce_fill(struct devlink_port *devlink_port, | |
62 | struct nla_bitfield32 *caps, | |
63 | struct netlink_ext_ack *extack) | |
64 | { | |
65 | bool is_enable; | |
66 | int err; | |
67 | ||
68 | if (!devlink_port->ops->port_fn_roce_get) | |
69 | return 0; | |
70 | ||
71 | err = devlink_port->ops->port_fn_roce_get(devlink_port, &is_enable, | |
72 | extack); | |
73 | if (err) { | |
74 | if (err == -EOPNOTSUPP) | |
75 | return 0; | |
76 | return err; | |
77 | } | |
78 | ||
79 | devlink_port_fn_cap_fill(caps, DEVLINK_PORT_FN_CAP_ROCE, is_enable); | |
80 | return 0; | |
81 | } | |
82 | ||
83 | static int devlink_port_fn_migratable_fill(struct devlink_port *devlink_port, | |
84 | struct nla_bitfield32 *caps, | |
85 | struct netlink_ext_ack *extack) | |
86 | { | |
87 | bool is_enable; | |
88 | int err; | |
89 | ||
90 | if (!devlink_port->ops->port_fn_migratable_get || | |
91 | devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF) | |
92 | return 0; | |
93 | ||
94 | err = devlink_port->ops->port_fn_migratable_get(devlink_port, | |
95 | &is_enable, extack); | |
96 | if (err) { | |
97 | if (err == -EOPNOTSUPP) | |
98 | return 0; | |
99 | return err; | |
100 | } | |
101 | ||
102 | devlink_port_fn_cap_fill(caps, DEVLINK_PORT_FN_CAP_MIGRATABLE, is_enable); | |
103 | return 0; | |
104 | } | |
105 | ||
106 | static int devlink_port_fn_ipsec_crypto_fill(struct devlink_port *devlink_port, | |
107 | struct nla_bitfield32 *caps, | |
108 | struct netlink_ext_ack *extack) | |
109 | { | |
110 | bool is_enable; | |
111 | int err; | |
112 | ||
113 | if (!devlink_port->ops->port_fn_ipsec_crypto_get || | |
114 | devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF) | |
115 | return 0; | |
116 | ||
117 | err = devlink_port->ops->port_fn_ipsec_crypto_get(devlink_port, &is_enable, extack); | |
118 | if (err) { | |
119 | if (err == -EOPNOTSUPP) | |
120 | return 0; | |
121 | return err; | |
122 | } | |
123 | ||
124 | devlink_port_fn_cap_fill(caps, DEVLINK_PORT_FN_CAP_IPSEC_CRYPTO, is_enable); | |
125 | return 0; | |
126 | } | |
127 | ||
128 | static int devlink_port_fn_ipsec_packet_fill(struct devlink_port *devlink_port, | |
129 | struct nla_bitfield32 *caps, | |
130 | struct netlink_ext_ack *extack) | |
131 | { | |
132 | bool is_enable; | |
133 | int err; | |
134 | ||
135 | if (!devlink_port->ops->port_fn_ipsec_packet_get || | |
136 | devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF) | |
137 | return 0; | |
138 | ||
139 | err = devlink_port->ops->port_fn_ipsec_packet_get(devlink_port, &is_enable, extack); | |
140 | if (err) { | |
141 | if (err == -EOPNOTSUPP) | |
142 | return 0; | |
143 | return err; | |
144 | } | |
145 | ||
146 | devlink_port_fn_cap_fill(caps, DEVLINK_PORT_FN_CAP_IPSEC_PACKET, is_enable); | |
147 | return 0; | |
148 | } | |
149 | ||
150 | static int devlink_port_fn_caps_fill(struct devlink_port *devlink_port, | |
151 | struct sk_buff *msg, | |
152 | struct netlink_ext_ack *extack, | |
153 | bool *msg_updated) | |
154 | { | |
155 | struct nla_bitfield32 caps = {}; | |
156 | int err; | |
157 | ||
158 | err = devlink_port_fn_roce_fill(devlink_port, &caps, extack); | |
159 | if (err) | |
160 | return err; | |
161 | ||
162 | err = devlink_port_fn_migratable_fill(devlink_port, &caps, extack); | |
163 | if (err) | |
164 | return err; | |
165 | ||
166 | err = devlink_port_fn_ipsec_crypto_fill(devlink_port, &caps, extack); | |
167 | if (err) | |
168 | return err; | |
169 | ||
170 | err = devlink_port_fn_ipsec_packet_fill(devlink_port, &caps, extack); | |
171 | if (err) | |
172 | return err; | |
173 | ||
174 | if (!caps.selector) | |
175 | return 0; | |
176 | err = nla_put_bitfield32(msg, DEVLINK_PORT_FN_ATTR_CAPS, caps.value, | |
177 | caps.selector); | |
178 | if (err) | |
179 | return err; | |
180 | ||
181 | *msg_updated = true; | |
182 | return 0; | |
183 | } | |
184 | ||
185 | int devlink_nl_port_handle_fill(struct sk_buff *msg, struct devlink_port *devlink_port) | |
186 | { | |
187 | if (devlink_nl_put_handle(msg, devlink_port->devlink)) | |
188 | return -EMSGSIZE; | |
189 | if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index)) | |
190 | return -EMSGSIZE; | |
191 | return 0; | |
192 | } | |
193 | ||
194 | size_t devlink_nl_port_handle_size(struct devlink_port *devlink_port) | |
195 | { | |
196 | struct devlink *devlink = devlink_port->devlink; | |
197 | ||
198 | return nla_total_size(strlen(devlink->dev->bus->name) + 1) /* DEVLINK_ATTR_BUS_NAME */ | |
199 | + nla_total_size(strlen(dev_name(devlink->dev)) + 1) /* DEVLINK_ATTR_DEV_NAME */ | |
200 | + nla_total_size(4); /* DEVLINK_ATTR_PORT_INDEX */ | |
201 | } | |
202 | ||
203 | static int devlink_nl_port_attrs_put(struct sk_buff *msg, | |
204 | struct devlink_port *devlink_port) | |
205 | { | |
206 | struct devlink_port_attrs *attrs = &devlink_port->attrs; | |
207 | ||
208 | if (!devlink_port->attrs_set) | |
209 | return 0; | |
210 | if (attrs->lanes) { | |
211 | if (nla_put_u32(msg, DEVLINK_ATTR_PORT_LANES, attrs->lanes)) | |
212 | return -EMSGSIZE; | |
213 | } | |
214 | if (nla_put_u8(msg, DEVLINK_ATTR_PORT_SPLITTABLE, attrs->splittable)) | |
215 | return -EMSGSIZE; | |
216 | if (nla_put_u16(msg, DEVLINK_ATTR_PORT_FLAVOUR, attrs->flavour)) | |
217 | return -EMSGSIZE; | |
218 | switch (devlink_port->attrs.flavour) { | |
219 | case DEVLINK_PORT_FLAVOUR_PCI_PF: | |
220 | if (nla_put_u32(msg, DEVLINK_ATTR_PORT_CONTROLLER_NUMBER, | |
221 | attrs->pci_pf.controller) || | |
222 | nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER, attrs->pci_pf.pf)) | |
223 | return -EMSGSIZE; | |
224 | if (nla_put_u8(msg, DEVLINK_ATTR_PORT_EXTERNAL, attrs->pci_pf.external)) | |
225 | return -EMSGSIZE; | |
226 | break; | |
227 | case DEVLINK_PORT_FLAVOUR_PCI_VF: | |
228 | if (nla_put_u32(msg, DEVLINK_ATTR_PORT_CONTROLLER_NUMBER, | |
229 | attrs->pci_vf.controller) || | |
230 | nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER, attrs->pci_vf.pf) || | |
231 | nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_VF_NUMBER, attrs->pci_vf.vf)) | |
232 | return -EMSGSIZE; | |
233 | if (nla_put_u8(msg, DEVLINK_ATTR_PORT_EXTERNAL, attrs->pci_vf.external)) | |
234 | return -EMSGSIZE; | |
235 | break; | |
236 | case DEVLINK_PORT_FLAVOUR_PCI_SF: | |
237 | if (nla_put_u32(msg, DEVLINK_ATTR_PORT_CONTROLLER_NUMBER, | |
238 | attrs->pci_sf.controller) || | |
239 | nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER, | |
240 | attrs->pci_sf.pf) || | |
241 | nla_put_u32(msg, DEVLINK_ATTR_PORT_PCI_SF_NUMBER, | |
242 | attrs->pci_sf.sf)) | |
243 | return -EMSGSIZE; | |
244 | break; | |
245 | case DEVLINK_PORT_FLAVOUR_PHYSICAL: | |
246 | case DEVLINK_PORT_FLAVOUR_CPU: | |
247 | case DEVLINK_PORT_FLAVOUR_DSA: | |
248 | if (nla_put_u32(msg, DEVLINK_ATTR_PORT_NUMBER, | |
249 | attrs->phys.port_number)) | |
250 | return -EMSGSIZE; | |
251 | if (!attrs->split) | |
252 | return 0; | |
253 | if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_GROUP, | |
254 | attrs->phys.port_number)) | |
255 | return -EMSGSIZE; | |
256 | if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_SUBPORT_NUMBER, | |
257 | attrs->phys.split_subport_number)) | |
258 | return -EMSGSIZE; | |
259 | break; | |
260 | default: | |
261 | break; | |
262 | } | |
263 | return 0; | |
264 | } | |
265 | ||
266 | static int devlink_port_fn_hw_addr_fill(struct devlink_port *port, | |
267 | struct sk_buff *msg, | |
268 | struct netlink_ext_ack *extack, | |
269 | bool *msg_updated) | |
270 | { | |
271 | u8 hw_addr[MAX_ADDR_LEN]; | |
272 | int hw_addr_len; | |
273 | int err; | |
274 | ||
275 | if (!port->ops->port_fn_hw_addr_get) | |
276 | return 0; | |
277 | ||
278 | err = port->ops->port_fn_hw_addr_get(port, hw_addr, &hw_addr_len, | |
279 | extack); | |
280 | if (err) { | |
281 | if (err == -EOPNOTSUPP) | |
282 | return 0; | |
283 | return err; | |
284 | } | |
285 | err = nla_put(msg, DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR, hw_addr_len, hw_addr); | |
286 | if (err) | |
287 | return err; | |
288 | *msg_updated = true; | |
289 | return 0; | |
290 | } | |
291 | ||
292 | static bool | |
293 | devlink_port_fn_state_valid(enum devlink_port_fn_state state) | |
294 | { | |
295 | return state == DEVLINK_PORT_FN_STATE_INACTIVE || | |
296 | state == DEVLINK_PORT_FN_STATE_ACTIVE; | |
297 | } | |
298 | ||
299 | static bool | |
300 | devlink_port_fn_opstate_valid(enum devlink_port_fn_opstate opstate) | |
301 | { | |
302 | return opstate == DEVLINK_PORT_FN_OPSTATE_DETACHED || | |
303 | opstate == DEVLINK_PORT_FN_OPSTATE_ATTACHED; | |
304 | } | |
305 | ||
306 | static int devlink_port_fn_state_fill(struct devlink_port *port, | |
307 | struct sk_buff *msg, | |
308 | struct netlink_ext_ack *extack, | |
309 | bool *msg_updated) | |
310 | { | |
311 | enum devlink_port_fn_opstate opstate; | |
312 | enum devlink_port_fn_state state; | |
313 | int err; | |
314 | ||
315 | if (!port->ops->port_fn_state_get) | |
316 | return 0; | |
317 | ||
318 | err = port->ops->port_fn_state_get(port, &state, &opstate, extack); | |
319 | if (err) { | |
320 | if (err == -EOPNOTSUPP) | |
321 | return 0; | |
322 | return err; | |
323 | } | |
324 | if (!devlink_port_fn_state_valid(state)) { | |
325 | WARN_ON_ONCE(1); | |
326 | NL_SET_ERR_MSG(extack, "Invalid state read from driver"); | |
327 | return -EINVAL; | |
328 | } | |
329 | if (!devlink_port_fn_opstate_valid(opstate)) { | |
330 | WARN_ON_ONCE(1); | |
331 | NL_SET_ERR_MSG(extack, "Invalid operational state read from driver"); | |
332 | return -EINVAL; | |
333 | } | |
334 | if (nla_put_u8(msg, DEVLINK_PORT_FN_ATTR_STATE, state) || | |
335 | nla_put_u8(msg, DEVLINK_PORT_FN_ATTR_OPSTATE, opstate)) | |
336 | return -EMSGSIZE; | |
337 | *msg_updated = true; | |
338 | return 0; | |
339 | } | |
340 | ||
341 | static int | |
342 | devlink_port_fn_mig_set(struct devlink_port *devlink_port, bool enable, | |
343 | struct netlink_ext_ack *extack) | |
344 | { | |
345 | return devlink_port->ops->port_fn_migratable_set(devlink_port, enable, | |
346 | extack); | |
347 | } | |
348 | ||
349 | static int | |
350 | devlink_port_fn_roce_set(struct devlink_port *devlink_port, bool enable, | |
351 | struct netlink_ext_ack *extack) | |
352 | { | |
353 | return devlink_port->ops->port_fn_roce_set(devlink_port, enable, | |
354 | extack); | |
355 | } | |
356 | ||
357 | static int | |
358 | devlink_port_fn_ipsec_crypto_set(struct devlink_port *devlink_port, bool enable, | |
359 | struct netlink_ext_ack *extack) | |
360 | { | |
361 | return devlink_port->ops->port_fn_ipsec_crypto_set(devlink_port, enable, extack); | |
362 | } | |
363 | ||
364 | static int | |
365 | devlink_port_fn_ipsec_packet_set(struct devlink_port *devlink_port, bool enable, | |
366 | struct netlink_ext_ack *extack) | |
367 | { | |
368 | return devlink_port->ops->port_fn_ipsec_packet_set(devlink_port, enable, extack); | |
369 | } | |
370 | ||
371 | static int devlink_port_fn_caps_set(struct devlink_port *devlink_port, | |
372 | const struct nlattr *attr, | |
373 | struct netlink_ext_ack *extack) | |
374 | { | |
375 | struct nla_bitfield32 caps; | |
376 | u32 caps_value; | |
377 | int err; | |
378 | ||
379 | caps = nla_get_bitfield32(attr); | |
380 | caps_value = caps.value & caps.selector; | |
381 | if (caps.selector & DEVLINK_PORT_FN_CAP_ROCE) { | |
382 | err = devlink_port_fn_roce_set(devlink_port, | |
383 | caps_value & DEVLINK_PORT_FN_CAP_ROCE, | |
384 | extack); | |
385 | if (err) | |
386 | return err; | |
387 | } | |
388 | if (caps.selector & DEVLINK_PORT_FN_CAP_MIGRATABLE) { | |
389 | err = devlink_port_fn_mig_set(devlink_port, caps_value & | |
390 | DEVLINK_PORT_FN_CAP_MIGRATABLE, | |
391 | extack); | |
392 | if (err) | |
393 | return err; | |
394 | } | |
395 | if (caps.selector & DEVLINK_PORT_FN_CAP_IPSEC_CRYPTO) { | |
396 | err = devlink_port_fn_ipsec_crypto_set(devlink_port, caps_value & | |
397 | DEVLINK_PORT_FN_CAP_IPSEC_CRYPTO, | |
398 | extack); | |
399 | if (err) | |
400 | return err; | |
401 | } | |
402 | if (caps.selector & DEVLINK_PORT_FN_CAP_IPSEC_PACKET) { | |
403 | err = devlink_port_fn_ipsec_packet_set(devlink_port, caps_value & | |
404 | DEVLINK_PORT_FN_CAP_IPSEC_PACKET, | |
405 | extack); | |
406 | if (err) | |
407 | return err; | |
408 | } | |
409 | return 0; | |
410 | } | |
411 | ||
412 | static int | |
413 | devlink_nl_port_function_attrs_put(struct sk_buff *msg, struct devlink_port *port, | |
414 | struct netlink_ext_ack *extack) | |
415 | { | |
416 | struct nlattr *function_attr; | |
417 | bool msg_updated = false; | |
418 | int err; | |
419 | ||
420 | function_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_PORT_FUNCTION); | |
421 | if (!function_attr) | |
422 | return -EMSGSIZE; | |
423 | ||
424 | err = devlink_port_fn_hw_addr_fill(port, msg, extack, &msg_updated); | |
425 | if (err) | |
426 | goto out; | |
427 | err = devlink_port_fn_caps_fill(port, msg, extack, &msg_updated); | |
428 | if (err) | |
429 | goto out; | |
430 | err = devlink_port_fn_state_fill(port, msg, extack, &msg_updated); | |
0b7a2721 JP |
431 | if (err) |
432 | goto out; | |
433 | err = devlink_rel_devlink_handle_put(msg, port->devlink, | |
434 | port->rel_index, | |
435 | DEVLINK_PORT_FN_ATTR_DEVLINK, | |
436 | &msg_updated); | |
437 | ||
eec1e5ea JP |
438 | out: |
439 | if (err || !msg_updated) | |
440 | nla_nest_cancel(msg, function_attr); | |
441 | else | |
442 | nla_nest_end(msg, function_attr); | |
443 | return err; | |
444 | } | |
445 | ||
446 | static int devlink_nl_port_fill(struct sk_buff *msg, | |
447 | struct devlink_port *devlink_port, | |
448 | enum devlink_command cmd, u32 portid, u32 seq, | |
449 | int flags, struct netlink_ext_ack *extack) | |
450 | { | |
451 | struct devlink *devlink = devlink_port->devlink; | |
452 | void *hdr; | |
453 | ||
454 | hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd); | |
455 | if (!hdr) | |
456 | return -EMSGSIZE; | |
457 | ||
458 | if (devlink_nl_put_handle(msg, devlink)) | |
459 | goto nla_put_failure; | |
460 | if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index)) | |
461 | goto nla_put_failure; | |
462 | ||
463 | spin_lock_bh(&devlink_port->type_lock); | |
464 | if (nla_put_u16(msg, DEVLINK_ATTR_PORT_TYPE, devlink_port->type)) | |
465 | goto nla_put_failure_type_locked; | |
466 | if (devlink_port->desired_type != DEVLINK_PORT_TYPE_NOTSET && | |
467 | nla_put_u16(msg, DEVLINK_ATTR_PORT_DESIRED_TYPE, | |
468 | devlink_port->desired_type)) | |
469 | goto nla_put_failure_type_locked; | |
470 | if (devlink_port->type == DEVLINK_PORT_TYPE_ETH) { | |
471 | if (devlink_port->type_eth.netdev && | |
472 | (nla_put_u32(msg, DEVLINK_ATTR_PORT_NETDEV_IFINDEX, | |
473 | devlink_port->type_eth.ifindex) || | |
474 | nla_put_string(msg, DEVLINK_ATTR_PORT_NETDEV_NAME, | |
475 | devlink_port->type_eth.ifname))) | |
476 | goto nla_put_failure_type_locked; | |
477 | } | |
478 | if (devlink_port->type == DEVLINK_PORT_TYPE_IB) { | |
479 | struct ib_device *ibdev = devlink_port->type_ib.ibdev; | |
480 | ||
481 | if (ibdev && | |
482 | nla_put_string(msg, DEVLINK_ATTR_PORT_IBDEV_NAME, | |
483 | ibdev->name)) | |
484 | goto nla_put_failure_type_locked; | |
485 | } | |
486 | spin_unlock_bh(&devlink_port->type_lock); | |
487 | if (devlink_nl_port_attrs_put(msg, devlink_port)) | |
488 | goto nla_put_failure; | |
489 | if (devlink_nl_port_function_attrs_put(msg, devlink_port, extack)) | |
490 | goto nla_put_failure; | |
491 | if (devlink_port->linecard && | |
492 | nla_put_u32(msg, DEVLINK_ATTR_LINECARD_INDEX, | |
d0b7e990 | 493 | devlink_linecard_index(devlink_port->linecard))) |
eec1e5ea JP |
494 | goto nla_put_failure; |
495 | ||
496 | genlmsg_end(msg, hdr); | |
497 | return 0; | |
498 | ||
499 | nla_put_failure_type_locked: | |
500 | spin_unlock_bh(&devlink_port->type_lock); | |
501 | nla_put_failure: | |
502 | genlmsg_cancel(msg, hdr); | |
503 | return -EMSGSIZE; | |
504 | } | |
505 | ||
506 | static void devlink_port_notify(struct devlink_port *devlink_port, | |
507 | enum devlink_command cmd) | |
508 | { | |
509 | struct devlink *devlink = devlink_port->devlink; | |
510 | struct sk_buff *msg; | |
511 | int err; | |
512 | ||
513 | WARN_ON(cmd != DEVLINK_CMD_PORT_NEW && cmd != DEVLINK_CMD_PORT_DEL); | |
514 | ||
515 | if (!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED)) | |
516 | return; | |
517 | ||
518 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
519 | if (!msg) | |
520 | return; | |
521 | ||
522 | err = devlink_nl_port_fill(msg, devlink_port, cmd, 0, 0, 0, NULL); | |
523 | if (err) { | |
524 | nlmsg_free(msg); | |
525 | return; | |
526 | } | |
527 | ||
528 | genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink), msg, | |
529 | 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL); | |
530 | } | |
531 | ||
532 | static void devlink_ports_notify(struct devlink *devlink, | |
533 | enum devlink_command cmd) | |
534 | { | |
535 | struct devlink_port *devlink_port; | |
536 | unsigned long port_index; | |
537 | ||
538 | xa_for_each(&devlink->ports, port_index, devlink_port) | |
539 | devlink_port_notify(devlink_port, cmd); | |
540 | } | |
541 | ||
542 | void devlink_ports_notify_register(struct devlink *devlink) | |
543 | { | |
544 | devlink_ports_notify(devlink, DEVLINK_CMD_PORT_NEW); | |
545 | } | |
546 | ||
547 | void devlink_ports_notify_unregister(struct devlink *devlink) | |
548 | { | |
549 | devlink_ports_notify(devlink, DEVLINK_CMD_PORT_DEL); | |
550 | } | |
551 | ||
552 | int devlink_nl_port_get_doit(struct sk_buff *skb, struct genl_info *info) | |
553 | { | |
554 | struct devlink_port *devlink_port = info->user_ptr[1]; | |
555 | struct sk_buff *msg; | |
556 | int err; | |
557 | ||
558 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
559 | if (!msg) | |
560 | return -ENOMEM; | |
561 | ||
562 | err = devlink_nl_port_fill(msg, devlink_port, DEVLINK_CMD_PORT_NEW, | |
563 | info->snd_portid, info->snd_seq, 0, | |
564 | info->extack); | |
565 | if (err) { | |
566 | nlmsg_free(msg); | |
567 | return err; | |
568 | } | |
569 | ||
570 | return genlmsg_reply(msg, info); | |
571 | } | |
572 | ||
573 | static int | |
574 | devlink_nl_port_get_dump_one(struct sk_buff *msg, struct devlink *devlink, | |
575 | struct netlink_callback *cb, int flags) | |
576 | { | |
577 | struct devlink_nl_dump_state *state = devlink_dump_state(cb); | |
578 | struct devlink_port *devlink_port; | |
579 | unsigned long port_index; | |
580 | int err = 0; | |
581 | ||
582 | xa_for_each_start(&devlink->ports, port_index, devlink_port, state->idx) { | |
583 | err = devlink_nl_port_fill(msg, devlink_port, | |
584 | DEVLINK_CMD_NEW, | |
585 | NETLINK_CB(cb->skb).portid, | |
586 | cb->nlh->nlmsg_seq, flags, | |
587 | cb->extack); | |
588 | if (err) { | |
589 | state->idx = port_index; | |
590 | break; | |
591 | } | |
592 | } | |
593 | ||
594 | return err; | |
595 | } | |
596 | ||
597 | int devlink_nl_port_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb) | |
598 | { | |
599 | return devlink_nl_dumpit(skb, cb, devlink_nl_port_get_dump_one); | |
600 | } | |
601 | ||
602 | static int devlink_port_type_set(struct devlink_port *devlink_port, | |
603 | enum devlink_port_type port_type) | |
604 | ||
605 | { | |
606 | int err; | |
607 | ||
608 | if (!devlink_port->ops->port_type_set) | |
609 | return -EOPNOTSUPP; | |
610 | ||
611 | if (port_type == devlink_port->type) | |
612 | return 0; | |
613 | ||
614 | err = devlink_port->ops->port_type_set(devlink_port, port_type); | |
615 | if (err) | |
616 | return err; | |
617 | ||
618 | devlink_port->desired_type = port_type; | |
619 | devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW); | |
620 | return 0; | |
621 | } | |
622 | ||
623 | static int devlink_port_function_hw_addr_set(struct devlink_port *port, | |
624 | const struct nlattr *attr, | |
625 | struct netlink_ext_ack *extack) | |
626 | { | |
627 | const u8 *hw_addr; | |
628 | int hw_addr_len; | |
629 | ||
630 | hw_addr = nla_data(attr); | |
631 | hw_addr_len = nla_len(attr); | |
632 | if (hw_addr_len > MAX_ADDR_LEN) { | |
633 | NL_SET_ERR_MSG(extack, "Port function hardware address too long"); | |
634 | return -EINVAL; | |
635 | } | |
636 | if (port->type == DEVLINK_PORT_TYPE_ETH) { | |
637 | if (hw_addr_len != ETH_ALEN) { | |
638 | NL_SET_ERR_MSG(extack, "Address must be 6 bytes for Ethernet device"); | |
639 | return -EINVAL; | |
640 | } | |
641 | if (!is_unicast_ether_addr(hw_addr)) { | |
642 | NL_SET_ERR_MSG(extack, "Non-unicast hardware address unsupported"); | |
643 | return -EINVAL; | |
644 | } | |
645 | } | |
646 | ||
647 | return port->ops->port_fn_hw_addr_set(port, hw_addr, hw_addr_len, | |
648 | extack); | |
649 | } | |
650 | ||
651 | static int devlink_port_fn_state_set(struct devlink_port *port, | |
652 | const struct nlattr *attr, | |
653 | struct netlink_ext_ack *extack) | |
654 | { | |
655 | enum devlink_port_fn_state state; | |
656 | ||
657 | state = nla_get_u8(attr); | |
658 | return port->ops->port_fn_state_set(port, state, extack); | |
659 | } | |
660 | ||
661 | static int devlink_port_function_validate(struct devlink_port *devlink_port, | |
662 | struct nlattr **tb, | |
663 | struct netlink_ext_ack *extack) | |
664 | { | |
665 | const struct devlink_port_ops *ops = devlink_port->ops; | |
666 | struct nlattr *attr; | |
667 | ||
668 | if (tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR] && | |
669 | !ops->port_fn_hw_addr_set) { | |
670 | NL_SET_ERR_MSG_ATTR(extack, tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR], | |
671 | "Port doesn't support function attributes"); | |
672 | return -EOPNOTSUPP; | |
673 | } | |
674 | if (tb[DEVLINK_PORT_FN_ATTR_STATE] && !ops->port_fn_state_set) { | |
675 | NL_SET_ERR_MSG_ATTR(extack, tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR], | |
676 | "Function does not support state setting"); | |
677 | return -EOPNOTSUPP; | |
678 | } | |
679 | attr = tb[DEVLINK_PORT_FN_ATTR_CAPS]; | |
680 | if (attr) { | |
681 | struct nla_bitfield32 caps; | |
682 | ||
683 | caps = nla_get_bitfield32(attr); | |
684 | if (caps.selector & DEVLINK_PORT_FN_CAP_ROCE && | |
685 | !ops->port_fn_roce_set) { | |
686 | NL_SET_ERR_MSG_ATTR(extack, attr, | |
687 | "Port doesn't support RoCE function attribute"); | |
688 | return -EOPNOTSUPP; | |
689 | } | |
690 | if (caps.selector & DEVLINK_PORT_FN_CAP_MIGRATABLE) { | |
691 | if (!ops->port_fn_migratable_set) { | |
692 | NL_SET_ERR_MSG_ATTR(extack, attr, | |
693 | "Port doesn't support migratable function attribute"); | |
694 | return -EOPNOTSUPP; | |
695 | } | |
696 | if (devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF) { | |
697 | NL_SET_ERR_MSG_ATTR(extack, attr, | |
698 | "migratable function attribute supported for VFs only"); | |
699 | return -EOPNOTSUPP; | |
700 | } | |
701 | } | |
702 | if (caps.selector & DEVLINK_PORT_FN_CAP_IPSEC_CRYPTO) { | |
703 | if (!ops->port_fn_ipsec_crypto_set) { | |
704 | NL_SET_ERR_MSG_ATTR(extack, attr, | |
705 | "Port doesn't support ipsec_crypto function attribute"); | |
706 | return -EOPNOTSUPP; | |
707 | } | |
708 | if (devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF) { | |
709 | NL_SET_ERR_MSG_ATTR(extack, attr, | |
710 | "ipsec_crypto function attribute supported for VFs only"); | |
711 | return -EOPNOTSUPP; | |
712 | } | |
713 | } | |
714 | if (caps.selector & DEVLINK_PORT_FN_CAP_IPSEC_PACKET) { | |
715 | if (!ops->port_fn_ipsec_packet_set) { | |
716 | NL_SET_ERR_MSG_ATTR(extack, attr, | |
717 | "Port doesn't support ipsec_packet function attribute"); | |
718 | return -EOPNOTSUPP; | |
719 | } | |
720 | if (devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF) { | |
721 | NL_SET_ERR_MSG_ATTR(extack, attr, | |
722 | "ipsec_packet function attribute supported for VFs only"); | |
723 | return -EOPNOTSUPP; | |
724 | } | |
725 | } | |
726 | } | |
727 | return 0; | |
728 | } | |
729 | ||
730 | static int devlink_port_function_set(struct devlink_port *port, | |
731 | const struct nlattr *attr, | |
732 | struct netlink_ext_ack *extack) | |
733 | { | |
734 | struct nlattr *tb[DEVLINK_PORT_FUNCTION_ATTR_MAX + 1]; | |
735 | int err; | |
736 | ||
737 | err = nla_parse_nested(tb, DEVLINK_PORT_FUNCTION_ATTR_MAX, attr, | |
738 | devlink_function_nl_policy, extack); | |
739 | if (err < 0) { | |
740 | NL_SET_ERR_MSG(extack, "Fail to parse port function attributes"); | |
741 | return err; | |
742 | } | |
743 | ||
744 | err = devlink_port_function_validate(port, tb, extack); | |
745 | if (err) | |
746 | return err; | |
747 | ||
748 | attr = tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR]; | |
749 | if (attr) { | |
750 | err = devlink_port_function_hw_addr_set(port, attr, extack); | |
751 | if (err) | |
752 | return err; | |
753 | } | |
754 | ||
755 | attr = tb[DEVLINK_PORT_FN_ATTR_CAPS]; | |
756 | if (attr) { | |
757 | err = devlink_port_fn_caps_set(port, attr, extack); | |
758 | if (err) | |
759 | return err; | |
760 | } | |
761 | ||
762 | /* Keep this as the last function attribute set, so that when | |
763 | * multiple port function attributes are set along with state, | |
764 | * Those can be applied first before activating the state. | |
765 | */ | |
766 | attr = tb[DEVLINK_PORT_FN_ATTR_STATE]; | |
767 | if (attr) | |
768 | err = devlink_port_fn_state_set(port, attr, extack); | |
769 | ||
770 | if (!err) | |
771 | devlink_port_notify(port, DEVLINK_CMD_PORT_NEW); | |
772 | return err; | |
773 | } | |
774 | ||
53590934 | 775 | int devlink_nl_port_set_doit(struct sk_buff *skb, struct genl_info *info) |
eec1e5ea JP |
776 | { |
777 | struct devlink_port *devlink_port = info->user_ptr[1]; | |
778 | int err; | |
779 | ||
780 | if (info->attrs[DEVLINK_ATTR_PORT_TYPE]) { | |
781 | enum devlink_port_type port_type; | |
782 | ||
783 | port_type = nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_TYPE]); | |
784 | err = devlink_port_type_set(devlink_port, port_type); | |
785 | if (err) | |
786 | return err; | |
787 | } | |
788 | ||
789 | if (info->attrs[DEVLINK_ATTR_PORT_FUNCTION]) { | |
790 | struct nlattr *attr = info->attrs[DEVLINK_ATTR_PORT_FUNCTION]; | |
791 | struct netlink_ext_ack *extack = info->extack; | |
792 | ||
793 | err = devlink_port_function_set(devlink_port, attr, extack); | |
794 | if (err) | |
795 | return err; | |
796 | } | |
797 | ||
798 | return 0; | |
799 | } | |
800 | ||
53590934 | 801 | int devlink_nl_port_split_doit(struct sk_buff *skb, struct genl_info *info) |
eec1e5ea JP |
802 | { |
803 | struct devlink_port *devlink_port = info->user_ptr[1]; | |
804 | struct devlink *devlink = info->user_ptr[0]; | |
805 | u32 count; | |
806 | ||
807 | if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_PORT_SPLIT_COUNT)) | |
808 | return -EINVAL; | |
809 | if (!devlink_port->ops->port_split) | |
810 | return -EOPNOTSUPP; | |
811 | ||
812 | count = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT]); | |
813 | ||
814 | if (!devlink_port->attrs.splittable) { | |
815 | /* Split ports cannot be split. */ | |
816 | if (devlink_port->attrs.split) | |
817 | NL_SET_ERR_MSG(info->extack, "Port cannot be split further"); | |
818 | else | |
819 | NL_SET_ERR_MSG(info->extack, "Port cannot be split"); | |
820 | return -EINVAL; | |
821 | } | |
822 | ||
823 | if (count < 2 || !is_power_of_2(count) || count > devlink_port->attrs.lanes) { | |
824 | NL_SET_ERR_MSG(info->extack, "Invalid split count"); | |
825 | return -EINVAL; | |
826 | } | |
827 | ||
828 | return devlink_port->ops->port_split(devlink, devlink_port, count, | |
829 | info->extack); | |
830 | } | |
831 | ||
53590934 | 832 | int devlink_nl_port_unsplit_doit(struct sk_buff *skb, struct genl_info *info) |
eec1e5ea JP |
833 | { |
834 | struct devlink_port *devlink_port = info->user_ptr[1]; | |
835 | struct devlink *devlink = info->user_ptr[0]; | |
836 | ||
837 | if (!devlink_port->ops->port_unsplit) | |
838 | return -EOPNOTSUPP; | |
839 | return devlink_port->ops->port_unsplit(devlink, devlink_port, info->extack); | |
840 | } | |
841 | ||
53590934 | 842 | int devlink_nl_port_new_doit(struct sk_buff *skb, struct genl_info *info) |
eec1e5ea JP |
843 | { |
844 | struct netlink_ext_ack *extack = info->extack; | |
845 | struct devlink_port_new_attrs new_attrs = {}; | |
846 | struct devlink *devlink = info->user_ptr[0]; | |
847 | struct devlink_port *devlink_port; | |
848 | struct sk_buff *msg; | |
849 | int err; | |
850 | ||
851 | if (!devlink->ops->port_new) | |
852 | return -EOPNOTSUPP; | |
853 | ||
854 | if (!info->attrs[DEVLINK_ATTR_PORT_FLAVOUR] || | |
855 | !info->attrs[DEVLINK_ATTR_PORT_PCI_PF_NUMBER]) { | |
856 | NL_SET_ERR_MSG(extack, "Port flavour or PCI PF are not specified"); | |
857 | return -EINVAL; | |
858 | } | |
859 | new_attrs.flavour = nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_FLAVOUR]); | |
860 | new_attrs.pfnum = | |
861 | nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_PCI_PF_NUMBER]); | |
862 | ||
863 | if (info->attrs[DEVLINK_ATTR_PORT_INDEX]) { | |
864 | /* Port index of the new port being created by driver. */ | |
865 | new_attrs.port_index = | |
866 | nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]); | |
867 | new_attrs.port_index_valid = true; | |
868 | } | |
869 | if (info->attrs[DEVLINK_ATTR_PORT_CONTROLLER_NUMBER]) { | |
870 | new_attrs.controller = | |
871 | nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_CONTROLLER_NUMBER]); | |
872 | new_attrs.controller_valid = true; | |
873 | } | |
874 | if (new_attrs.flavour == DEVLINK_PORT_FLAVOUR_PCI_SF && | |
875 | info->attrs[DEVLINK_ATTR_PORT_PCI_SF_NUMBER]) { | |
876 | new_attrs.sfnum = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_PCI_SF_NUMBER]); | |
877 | new_attrs.sfnum_valid = true; | |
878 | } | |
879 | ||
880 | err = devlink->ops->port_new(devlink, &new_attrs, | |
881 | extack, &devlink_port); | |
882 | if (err) | |
883 | return err; | |
884 | ||
885 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
886 | if (!msg) { | |
887 | err = -ENOMEM; | |
888 | goto err_out_port_del; | |
889 | } | |
890 | err = devlink_nl_port_fill(msg, devlink_port, DEVLINK_CMD_NEW, | |
891 | info->snd_portid, info->snd_seq, 0, NULL); | |
892 | if (WARN_ON_ONCE(err)) | |
893 | goto err_out_msg_free; | |
894 | err = genlmsg_reply(msg, info); | |
895 | if (err) | |
896 | goto err_out_port_del; | |
897 | return 0; | |
898 | ||
899 | err_out_msg_free: | |
900 | nlmsg_free(msg); | |
901 | err_out_port_del: | |
902 | devlink_port->ops->port_del(devlink, devlink_port, NULL); | |
903 | return err; | |
904 | } | |
905 | ||
53590934 | 906 | int devlink_nl_port_del_doit(struct sk_buff *skb, struct genl_info *info) |
eec1e5ea JP |
907 | { |
908 | struct devlink_port *devlink_port = info->user_ptr[1]; | |
909 | struct netlink_ext_ack *extack = info->extack; | |
910 | struct devlink *devlink = info->user_ptr[0]; | |
911 | ||
912 | if (!devlink_port->ops->port_del) | |
913 | return -EOPNOTSUPP; | |
914 | ||
915 | return devlink_port->ops->port_del(devlink, devlink_port, extack); | |
916 | } | |
917 | ||
918 | static void devlink_port_type_warn(struct work_struct *work) | |
919 | { | |
920 | struct devlink_port *port = container_of(to_delayed_work(work), | |
921 | struct devlink_port, | |
922 | type_warn_dw); | |
923 | dev_warn(port->devlink->dev, "Type was not set for devlink port."); | |
924 | } | |
925 | ||
926 | static bool devlink_port_type_should_warn(struct devlink_port *devlink_port) | |
927 | { | |
928 | /* Ignore CPU and DSA flavours. */ | |
929 | return devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_CPU && | |
930 | devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_DSA && | |
931 | devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_UNUSED; | |
932 | } | |
933 | ||
934 | #define DEVLINK_PORT_TYPE_WARN_TIMEOUT (HZ * 3600) | |
935 | ||
936 | static void devlink_port_type_warn_schedule(struct devlink_port *devlink_port) | |
937 | { | |
938 | if (!devlink_port_type_should_warn(devlink_port)) | |
939 | return; | |
940 | /* Schedule a work to WARN in case driver does not set port | |
941 | * type within timeout. | |
942 | */ | |
943 | schedule_delayed_work(&devlink_port->type_warn_dw, | |
944 | DEVLINK_PORT_TYPE_WARN_TIMEOUT); | |
945 | } | |
946 | ||
947 | static void devlink_port_type_warn_cancel(struct devlink_port *devlink_port) | |
948 | { | |
949 | if (!devlink_port_type_should_warn(devlink_port)) | |
950 | return; | |
951 | cancel_delayed_work_sync(&devlink_port->type_warn_dw); | |
952 | } | |
953 | ||
954 | /** | |
955 | * devlink_port_init() - Init devlink port | |
956 | * | |
957 | * @devlink: devlink | |
958 | * @devlink_port: devlink port | |
959 | * | |
960 | * Initialize essential stuff that is needed for functions | |
961 | * that may be called before devlink port registration. | |
962 | * Call to this function is optional and not needed | |
963 | * in case the driver does not use such functions. | |
964 | */ | |
965 | void devlink_port_init(struct devlink *devlink, | |
966 | struct devlink_port *devlink_port) | |
967 | { | |
968 | if (devlink_port->initialized) | |
969 | return; | |
970 | devlink_port->devlink = devlink; | |
971 | INIT_LIST_HEAD(&devlink_port->region_list); | |
972 | devlink_port->initialized = true; | |
973 | } | |
974 | EXPORT_SYMBOL_GPL(devlink_port_init); | |
975 | ||
976 | /** | |
977 | * devlink_port_fini() - Deinitialize devlink port | |
978 | * | |
979 | * @devlink_port: devlink port | |
980 | * | |
981 | * Deinitialize essential stuff that is in use for functions | |
982 | * that may be called after devlink port unregistration. | |
983 | * Call to this function is optional and not needed | |
984 | * in case the driver does not use such functions. | |
985 | */ | |
986 | void devlink_port_fini(struct devlink_port *devlink_port) | |
987 | { | |
988 | WARN_ON(!list_empty(&devlink_port->region_list)); | |
989 | } | |
990 | EXPORT_SYMBOL_GPL(devlink_port_fini); | |
991 | ||
992 | static const struct devlink_port_ops devlink_port_dummy_ops = {}; | |
993 | ||
994 | /** | |
995 | * devl_port_register_with_ops() - Register devlink port | |
996 | * | |
997 | * @devlink: devlink | |
998 | * @devlink_port: devlink port | |
999 | * @port_index: driver-specific numerical identifier of the port | |
1000 | * @ops: port ops | |
1001 | * | |
1002 | * Register devlink port with provided port index. User can use | |
1003 | * any indexing, even hw-related one. devlink_port structure | |
1004 | * is convenient to be embedded inside user driver private structure. | |
1005 | * Note that the caller should take care of zeroing the devlink_port | |
1006 | * structure. | |
1007 | */ | |
1008 | int devl_port_register_with_ops(struct devlink *devlink, | |
1009 | struct devlink_port *devlink_port, | |
1010 | unsigned int port_index, | |
1011 | const struct devlink_port_ops *ops) | |
1012 | { | |
1013 | int err; | |
1014 | ||
1015 | devl_assert_locked(devlink); | |
1016 | ||
1017 | ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port); | |
1018 | ||
1019 | devlink_port_init(devlink, devlink_port); | |
1020 | devlink_port->registered = true; | |
1021 | devlink_port->index = port_index; | |
1022 | devlink_port->ops = ops ? ops : &devlink_port_dummy_ops; | |
1023 | spin_lock_init(&devlink_port->type_lock); | |
1024 | INIT_LIST_HEAD(&devlink_port->reporter_list); | |
1025 | err = xa_insert(&devlink->ports, port_index, devlink_port, GFP_KERNEL); | |
1026 | if (err) { | |
1027 | devlink_port->registered = false; | |
1028 | return err; | |
1029 | } | |
1030 | ||
1031 | INIT_DELAYED_WORK(&devlink_port->type_warn_dw, &devlink_port_type_warn); | |
1032 | devlink_port_type_warn_schedule(devlink_port); | |
1033 | devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW); | |
1034 | return 0; | |
1035 | } | |
1036 | EXPORT_SYMBOL_GPL(devl_port_register_with_ops); | |
1037 | ||
1038 | /** | |
1039 | * devlink_port_register_with_ops - Register devlink port | |
1040 | * | |
1041 | * @devlink: devlink | |
1042 | * @devlink_port: devlink port | |
1043 | * @port_index: driver-specific numerical identifier of the port | |
1044 | * @ops: port ops | |
1045 | * | |
1046 | * Register devlink port with provided port index. User can use | |
1047 | * any indexing, even hw-related one. devlink_port structure | |
1048 | * is convenient to be embedded inside user driver private structure. | |
1049 | * Note that the caller should take care of zeroing the devlink_port | |
1050 | * structure. | |
1051 | * | |
1052 | * Context: Takes and release devlink->lock <mutex>. | |
1053 | */ | |
1054 | int devlink_port_register_with_ops(struct devlink *devlink, | |
1055 | struct devlink_port *devlink_port, | |
1056 | unsigned int port_index, | |
1057 | const struct devlink_port_ops *ops) | |
1058 | { | |
1059 | int err; | |
1060 | ||
1061 | devl_lock(devlink); | |
1062 | err = devl_port_register_with_ops(devlink, devlink_port, | |
1063 | port_index, ops); | |
1064 | devl_unlock(devlink); | |
1065 | return err; | |
1066 | } | |
1067 | EXPORT_SYMBOL_GPL(devlink_port_register_with_ops); | |
1068 | ||
1069 | /** | |
1070 | * devl_port_unregister() - Unregister devlink port | |
1071 | * | |
1072 | * @devlink_port: devlink port | |
1073 | */ | |
1074 | void devl_port_unregister(struct devlink_port *devlink_port) | |
1075 | { | |
1076 | lockdep_assert_held(&devlink_port->devlink->lock); | |
1077 | WARN_ON(devlink_port->type != DEVLINK_PORT_TYPE_NOTSET); | |
1078 | ||
1079 | devlink_port_type_warn_cancel(devlink_port); | |
1080 | devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL); | |
1081 | xa_erase(&devlink_port->devlink->ports, devlink_port->index); | |
1082 | WARN_ON(!list_empty(&devlink_port->reporter_list)); | |
1083 | devlink_port->registered = false; | |
1084 | } | |
1085 | EXPORT_SYMBOL_GPL(devl_port_unregister); | |
1086 | ||
1087 | /** | |
1088 | * devlink_port_unregister - Unregister devlink port | |
1089 | * | |
1090 | * @devlink_port: devlink port | |
1091 | * | |
1092 | * Context: Takes and release devlink->lock <mutex>. | |
1093 | */ | |
1094 | void devlink_port_unregister(struct devlink_port *devlink_port) | |
1095 | { | |
1096 | struct devlink *devlink = devlink_port->devlink; | |
1097 | ||
1098 | devl_lock(devlink); | |
1099 | devl_port_unregister(devlink_port); | |
1100 | devl_unlock(devlink); | |
1101 | } | |
1102 | EXPORT_SYMBOL_GPL(devlink_port_unregister); | |
1103 | ||
1104 | static void devlink_port_type_netdev_checks(struct devlink_port *devlink_port, | |
1105 | struct net_device *netdev) | |
1106 | { | |
1107 | const struct net_device_ops *ops = netdev->netdev_ops; | |
1108 | ||
1109 | /* If driver registers devlink port, it should set devlink port | |
1110 | * attributes accordingly so the compat functions are called | |
1111 | * and the original ops are not used. | |
1112 | */ | |
1113 | if (ops->ndo_get_phys_port_name) { | |
1114 | /* Some drivers use the same set of ndos for netdevs | |
1115 | * that have devlink_port registered and also for | |
1116 | * those who don't. Make sure that ndo_get_phys_port_name | |
1117 | * returns -EOPNOTSUPP here in case it is defined. | |
1118 | * Warn if not. | |
1119 | */ | |
1120 | char name[IFNAMSIZ]; | |
1121 | int err; | |
1122 | ||
1123 | err = ops->ndo_get_phys_port_name(netdev, name, sizeof(name)); | |
1124 | WARN_ON(err != -EOPNOTSUPP); | |
1125 | } | |
1126 | if (ops->ndo_get_port_parent_id) { | |
1127 | /* Some drivers use the same set of ndos for netdevs | |
1128 | * that have devlink_port registered and also for | |
1129 | * those who don't. Make sure that ndo_get_port_parent_id | |
1130 | * returns -EOPNOTSUPP here in case it is defined. | |
1131 | * Warn if not. | |
1132 | */ | |
1133 | struct netdev_phys_item_id ppid; | |
1134 | int err; | |
1135 | ||
1136 | err = ops->ndo_get_port_parent_id(netdev, &ppid); | |
1137 | WARN_ON(err != -EOPNOTSUPP); | |
1138 | } | |
1139 | } | |
1140 | ||
1141 | static void __devlink_port_type_set(struct devlink_port *devlink_port, | |
1142 | enum devlink_port_type type, | |
1143 | void *type_dev) | |
1144 | { | |
1145 | struct net_device *netdev = type_dev; | |
1146 | ||
1147 | ASSERT_DEVLINK_PORT_REGISTERED(devlink_port); | |
1148 | ||
1149 | if (type == DEVLINK_PORT_TYPE_NOTSET) { | |
1150 | devlink_port_type_warn_schedule(devlink_port); | |
1151 | } else { | |
1152 | devlink_port_type_warn_cancel(devlink_port); | |
1153 | if (type == DEVLINK_PORT_TYPE_ETH && netdev) | |
1154 | devlink_port_type_netdev_checks(devlink_port, netdev); | |
1155 | } | |
1156 | ||
1157 | spin_lock_bh(&devlink_port->type_lock); | |
1158 | devlink_port->type = type; | |
1159 | switch (type) { | |
1160 | case DEVLINK_PORT_TYPE_ETH: | |
1161 | devlink_port->type_eth.netdev = netdev; | |
1162 | if (netdev) { | |
1163 | ASSERT_RTNL(); | |
1164 | devlink_port->type_eth.ifindex = netdev->ifindex; | |
1165 | BUILD_BUG_ON(sizeof(devlink_port->type_eth.ifname) != | |
1166 | sizeof(netdev->name)); | |
1167 | strcpy(devlink_port->type_eth.ifname, netdev->name); | |
1168 | } | |
1169 | break; | |
1170 | case DEVLINK_PORT_TYPE_IB: | |
1171 | devlink_port->type_ib.ibdev = type_dev; | |
1172 | break; | |
1173 | default: | |
1174 | break; | |
1175 | } | |
1176 | spin_unlock_bh(&devlink_port->type_lock); | |
1177 | devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW); | |
1178 | } | |
1179 | ||
1180 | /** | |
1181 | * devlink_port_type_eth_set - Set port type to Ethernet | |
1182 | * | |
1183 | * @devlink_port: devlink port | |
1184 | * | |
1185 | * If driver is calling this, most likely it is doing something wrong. | |
1186 | */ | |
1187 | void devlink_port_type_eth_set(struct devlink_port *devlink_port) | |
1188 | { | |
1189 | dev_warn(devlink_port->devlink->dev, | |
1190 | "devlink port type for port %d set to Ethernet without a software interface reference, device type not supported by the kernel?\n", | |
1191 | devlink_port->index); | |
1192 | __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_ETH, NULL); | |
1193 | } | |
1194 | EXPORT_SYMBOL_GPL(devlink_port_type_eth_set); | |
1195 | ||
1196 | /** | |
1197 | * devlink_port_type_ib_set - Set port type to InfiniBand | |
1198 | * | |
1199 | * @devlink_port: devlink port | |
1200 | * @ibdev: related IB device | |
1201 | */ | |
1202 | void devlink_port_type_ib_set(struct devlink_port *devlink_port, | |
1203 | struct ib_device *ibdev) | |
1204 | { | |
1205 | __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_IB, ibdev); | |
1206 | } | |
1207 | EXPORT_SYMBOL_GPL(devlink_port_type_ib_set); | |
1208 | ||
1209 | /** | |
1210 | * devlink_port_type_clear - Clear port type | |
1211 | * | |
1212 | * @devlink_port: devlink port | |
1213 | * | |
1214 | * If driver is calling this for clearing Ethernet type, most likely | |
1215 | * it is doing something wrong. | |
1216 | */ | |
1217 | void devlink_port_type_clear(struct devlink_port *devlink_port) | |
1218 | { | |
1219 | if (devlink_port->type == DEVLINK_PORT_TYPE_ETH) | |
1220 | dev_warn(devlink_port->devlink->dev, | |
1221 | "devlink port type for port %d cleared without a software interface reference, device type not supported by the kernel?\n", | |
1222 | devlink_port->index); | |
1223 | __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_NOTSET, NULL); | |
1224 | } | |
1225 | EXPORT_SYMBOL_GPL(devlink_port_type_clear); | |
1226 | ||
1227 | int devlink_port_netdevice_event(struct notifier_block *nb, | |
1228 | unsigned long event, void *ptr) | |
1229 | { | |
1230 | struct net_device *netdev = netdev_notifier_info_to_dev(ptr); | |
1231 | struct devlink_port *devlink_port = netdev->devlink_port; | |
1232 | struct devlink *devlink; | |
1233 | ||
1234 | if (!devlink_port) | |
1235 | return NOTIFY_OK; | |
1236 | devlink = devlink_port->devlink; | |
1237 | ||
1238 | switch (event) { | |
1239 | case NETDEV_POST_INIT: | |
1240 | /* Set the type but not netdev pointer. It is going to be set | |
1241 | * later on by NETDEV_REGISTER event. Happens once during | |
1242 | * netdevice register | |
1243 | */ | |
1244 | __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_ETH, | |
1245 | NULL); | |
1246 | break; | |
1247 | case NETDEV_REGISTER: | |
1248 | case NETDEV_CHANGENAME: | |
1249 | if (devlink_net(devlink) != dev_net(netdev)) | |
1250 | return NOTIFY_OK; | |
1251 | /* Set the netdev on top of previously set type. Note this | |
1252 | * event happens also during net namespace change so here | |
1253 | * we take into account netdev pointer appearing in this | |
1254 | * namespace. | |
1255 | */ | |
1256 | __devlink_port_type_set(devlink_port, devlink_port->type, | |
1257 | netdev); | |
1258 | break; | |
1259 | case NETDEV_UNREGISTER: | |
1260 | if (devlink_net(devlink) != dev_net(netdev)) | |
1261 | return NOTIFY_OK; | |
1262 | /* Clear netdev pointer, but not the type. This event happens | |
1263 | * also during net namespace change so we need to clear | |
1264 | * pointer to netdev that is going to another net namespace. | |
1265 | */ | |
1266 | __devlink_port_type_set(devlink_port, devlink_port->type, | |
1267 | NULL); | |
1268 | break; | |
1269 | case NETDEV_PRE_UNINIT: | |
1270 | /* Clear the type and the netdev pointer. Happens one during | |
1271 | * netdevice unregister. | |
1272 | */ | |
1273 | __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_NOTSET, | |
1274 | NULL); | |
1275 | break; | |
1276 | } | |
1277 | ||
1278 | return NOTIFY_OK; | |
1279 | } | |
1280 | ||
1281 | static int __devlink_port_attrs_set(struct devlink_port *devlink_port, | |
1282 | enum devlink_port_flavour flavour) | |
1283 | { | |
1284 | struct devlink_port_attrs *attrs = &devlink_port->attrs; | |
1285 | ||
1286 | devlink_port->attrs_set = true; | |
1287 | attrs->flavour = flavour; | |
1288 | if (attrs->switch_id.id_len) { | |
1289 | devlink_port->switch_port = true; | |
1290 | if (WARN_ON(attrs->switch_id.id_len > MAX_PHYS_ITEM_ID_LEN)) | |
1291 | attrs->switch_id.id_len = MAX_PHYS_ITEM_ID_LEN; | |
1292 | } else { | |
1293 | devlink_port->switch_port = false; | |
1294 | } | |
1295 | return 0; | |
1296 | } | |
1297 | ||
1298 | /** | |
1299 | * devlink_port_attrs_set - Set port attributes | |
1300 | * | |
1301 | * @devlink_port: devlink port | |
1302 | * @attrs: devlink port attrs | |
1303 | */ | |
1304 | void devlink_port_attrs_set(struct devlink_port *devlink_port, | |
1305 | struct devlink_port_attrs *attrs) | |
1306 | { | |
1307 | int ret; | |
1308 | ||
1309 | ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port); | |
1310 | ||
1311 | devlink_port->attrs = *attrs; | |
1312 | ret = __devlink_port_attrs_set(devlink_port, attrs->flavour); | |
1313 | if (ret) | |
1314 | return; | |
1315 | WARN_ON(attrs->splittable && attrs->split); | |
1316 | } | |
1317 | EXPORT_SYMBOL_GPL(devlink_port_attrs_set); | |
1318 | ||
1319 | /** | |
1320 | * devlink_port_attrs_pci_pf_set - Set PCI PF port attributes | |
1321 | * | |
1322 | * @devlink_port: devlink port | |
1323 | * @controller: associated controller number for the devlink port instance | |
1324 | * @pf: associated PF for the devlink port instance | |
1325 | * @external: indicates if the port is for an external controller | |
1326 | */ | |
1327 | void devlink_port_attrs_pci_pf_set(struct devlink_port *devlink_port, u32 controller, | |
1328 | u16 pf, bool external) | |
1329 | { | |
1330 | struct devlink_port_attrs *attrs = &devlink_port->attrs; | |
1331 | int ret; | |
1332 | ||
1333 | ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port); | |
1334 | ||
1335 | ret = __devlink_port_attrs_set(devlink_port, | |
1336 | DEVLINK_PORT_FLAVOUR_PCI_PF); | |
1337 | if (ret) | |
1338 | return; | |
1339 | attrs->pci_pf.controller = controller; | |
1340 | attrs->pci_pf.pf = pf; | |
1341 | attrs->pci_pf.external = external; | |
1342 | } | |
1343 | EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_pf_set); | |
1344 | ||
1345 | /** | |
1346 | * devlink_port_attrs_pci_vf_set - Set PCI VF port attributes | |
1347 | * | |
1348 | * @devlink_port: devlink port | |
1349 | * @controller: associated controller number for the devlink port instance | |
1350 | * @pf: associated PF for the devlink port instance | |
1351 | * @vf: associated VF of a PF for the devlink port instance | |
1352 | * @external: indicates if the port is for an external controller | |
1353 | */ | |
1354 | void devlink_port_attrs_pci_vf_set(struct devlink_port *devlink_port, u32 controller, | |
1355 | u16 pf, u16 vf, bool external) | |
1356 | { | |
1357 | struct devlink_port_attrs *attrs = &devlink_port->attrs; | |
1358 | int ret; | |
1359 | ||
1360 | ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port); | |
1361 | ||
1362 | ret = __devlink_port_attrs_set(devlink_port, | |
1363 | DEVLINK_PORT_FLAVOUR_PCI_VF); | |
1364 | if (ret) | |
1365 | return; | |
1366 | attrs->pci_vf.controller = controller; | |
1367 | attrs->pci_vf.pf = pf; | |
1368 | attrs->pci_vf.vf = vf; | |
1369 | attrs->pci_vf.external = external; | |
1370 | } | |
1371 | EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_vf_set); | |
1372 | ||
1373 | /** | |
1374 | * devlink_port_attrs_pci_sf_set - Set PCI SF port attributes | |
1375 | * | |
1376 | * @devlink_port: devlink port | |
1377 | * @controller: associated controller number for the devlink port instance | |
1378 | * @pf: associated PF for the devlink port instance | |
1379 | * @sf: associated SF of a PF for the devlink port instance | |
1380 | * @external: indicates if the port is for an external controller | |
1381 | */ | |
1382 | void devlink_port_attrs_pci_sf_set(struct devlink_port *devlink_port, u32 controller, | |
1383 | u16 pf, u32 sf, bool external) | |
1384 | { | |
1385 | struct devlink_port_attrs *attrs = &devlink_port->attrs; | |
1386 | int ret; | |
1387 | ||
1388 | ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port); | |
1389 | ||
1390 | ret = __devlink_port_attrs_set(devlink_port, | |
1391 | DEVLINK_PORT_FLAVOUR_PCI_SF); | |
1392 | if (ret) | |
1393 | return; | |
1394 | attrs->pci_sf.controller = controller; | |
1395 | attrs->pci_sf.pf = pf; | |
1396 | attrs->pci_sf.sf = sf; | |
1397 | attrs->pci_sf.external = external; | |
1398 | } | |
1399 | EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_sf_set); | |
1400 | ||
0b7a2721 JP |
1401 | static void devlink_port_rel_notify_cb(struct devlink *devlink, u32 port_index) |
1402 | { | |
1403 | struct devlink_port *devlink_port; | |
1404 | ||
1405 | devlink_port = devlink_port_get_by_index(devlink, port_index); | |
1406 | if (!devlink_port) | |
1407 | return; | |
1408 | devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW); | |
1409 | } | |
1410 | ||
1411 | static void devlink_port_rel_cleanup_cb(struct devlink *devlink, u32 port_index, | |
1412 | u32 rel_index) | |
1413 | { | |
1414 | struct devlink_port *devlink_port; | |
1415 | ||
1416 | devlink_port = devlink_port_get_by_index(devlink, port_index); | |
1417 | if (devlink_port && devlink_port->rel_index == rel_index) | |
1418 | devlink_port->rel_index = 0; | |
1419 | } | |
1420 | ||
1421 | /** | |
1422 | * devl_port_fn_devlink_set - Attach peer devlink | |
1423 | * instance to port function. | |
1424 | * @devlink_port: devlink port | |
1425 | * @fn_devlink: devlink instance to attach | |
1426 | */ | |
1427 | int devl_port_fn_devlink_set(struct devlink_port *devlink_port, | |
1428 | struct devlink *fn_devlink) | |
1429 | { | |
1430 | ASSERT_DEVLINK_PORT_REGISTERED(devlink_port); | |
1431 | ||
1432 | if (WARN_ON(devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_SF || | |
1433 | devlink_port->attrs.pci_sf.external)) | |
1434 | return -EINVAL; | |
1435 | ||
1436 | return devlink_rel_nested_in_add(&devlink_port->rel_index, | |
1437 | devlink_port->devlink->index, | |
1438 | devlink_port->index, | |
1439 | devlink_port_rel_notify_cb, | |
1440 | devlink_port_rel_cleanup_cb, | |
1441 | fn_devlink); | |
1442 | } | |
1443 | EXPORT_SYMBOL_GPL(devl_port_fn_devlink_set); | |
1444 | ||
eec1e5ea JP |
1445 | /** |
1446 | * devlink_port_linecard_set - Link port with a linecard | |
1447 | * | |
1448 | * @devlink_port: devlink port | |
1449 | * @linecard: devlink linecard | |
1450 | */ | |
1451 | void devlink_port_linecard_set(struct devlink_port *devlink_port, | |
1452 | struct devlink_linecard *linecard) | |
1453 | { | |
1454 | ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port); | |
1455 | ||
1456 | devlink_port->linecard = linecard; | |
1457 | } | |
1458 | EXPORT_SYMBOL_GPL(devlink_port_linecard_set); | |
1459 | ||
1460 | static int __devlink_port_phys_port_name_get(struct devlink_port *devlink_port, | |
1461 | char *name, size_t len) | |
1462 | { | |
1463 | struct devlink_port_attrs *attrs = &devlink_port->attrs; | |
1464 | int n = 0; | |
1465 | ||
1466 | if (!devlink_port->attrs_set) | |
1467 | return -EOPNOTSUPP; | |
1468 | ||
1469 | switch (attrs->flavour) { | |
1470 | case DEVLINK_PORT_FLAVOUR_PHYSICAL: | |
1471 | if (devlink_port->linecard) | |
1472 | n = snprintf(name, len, "l%u", | |
d0b7e990 | 1473 | devlink_linecard_index(devlink_port->linecard)); |
eec1e5ea JP |
1474 | if (n < len) |
1475 | n += snprintf(name + n, len - n, "p%u", | |
1476 | attrs->phys.port_number); | |
1477 | if (n < len && attrs->split) | |
1478 | n += snprintf(name + n, len - n, "s%u", | |
1479 | attrs->phys.split_subport_number); | |
1480 | break; | |
1481 | case DEVLINK_PORT_FLAVOUR_CPU: | |
1482 | case DEVLINK_PORT_FLAVOUR_DSA: | |
1483 | case DEVLINK_PORT_FLAVOUR_UNUSED: | |
1484 | /* As CPU and DSA ports do not have a netdevice associated | |
1485 | * case should not ever happen. | |
1486 | */ | |
1487 | WARN_ON(1); | |
1488 | return -EINVAL; | |
1489 | case DEVLINK_PORT_FLAVOUR_PCI_PF: | |
1490 | if (attrs->pci_pf.external) { | |
1491 | n = snprintf(name, len, "c%u", attrs->pci_pf.controller); | |
1492 | if (n >= len) | |
1493 | return -EINVAL; | |
1494 | len -= n; | |
1495 | name += n; | |
1496 | } | |
1497 | n = snprintf(name, len, "pf%u", attrs->pci_pf.pf); | |
1498 | break; | |
1499 | case DEVLINK_PORT_FLAVOUR_PCI_VF: | |
1500 | if (attrs->pci_vf.external) { | |
1501 | n = snprintf(name, len, "c%u", attrs->pci_vf.controller); | |
1502 | if (n >= len) | |
1503 | return -EINVAL; | |
1504 | len -= n; | |
1505 | name += n; | |
1506 | } | |
1507 | n = snprintf(name, len, "pf%uvf%u", | |
1508 | attrs->pci_vf.pf, attrs->pci_vf.vf); | |
1509 | break; | |
1510 | case DEVLINK_PORT_FLAVOUR_PCI_SF: | |
1511 | if (attrs->pci_sf.external) { | |
1512 | n = snprintf(name, len, "c%u", attrs->pci_sf.controller); | |
1513 | if (n >= len) | |
1514 | return -EINVAL; | |
1515 | len -= n; | |
1516 | name += n; | |
1517 | } | |
1518 | n = snprintf(name, len, "pf%usf%u", attrs->pci_sf.pf, | |
1519 | attrs->pci_sf.sf); | |
1520 | break; | |
1521 | case DEVLINK_PORT_FLAVOUR_VIRTUAL: | |
1522 | return -EOPNOTSUPP; | |
1523 | } | |
1524 | ||
1525 | if (n >= len) | |
1526 | return -EINVAL; | |
1527 | ||
1528 | return 0; | |
1529 | } | |
1530 | ||
1531 | int devlink_compat_phys_port_name_get(struct net_device *dev, | |
1532 | char *name, size_t len) | |
1533 | { | |
1534 | struct devlink_port *devlink_port; | |
1535 | ||
1536 | /* RTNL mutex is held here which ensures that devlink_port | |
1537 | * instance cannot disappear in the middle. No need to take | |
1538 | * any devlink lock as only permanent values are accessed. | |
1539 | */ | |
1540 | ASSERT_RTNL(); | |
1541 | ||
1542 | devlink_port = dev->devlink_port; | |
1543 | if (!devlink_port) | |
1544 | return -EOPNOTSUPP; | |
1545 | ||
1546 | return __devlink_port_phys_port_name_get(devlink_port, name, len); | |
1547 | } | |
1548 | ||
1549 | int devlink_compat_switch_id_get(struct net_device *dev, | |
1550 | struct netdev_phys_item_id *ppid) | |
1551 | { | |
1552 | struct devlink_port *devlink_port; | |
1553 | ||
1554 | /* Caller must hold RTNL mutex or reference to dev, which ensures that | |
1555 | * devlink_port instance cannot disappear in the middle. No need to take | |
1556 | * any devlink lock as only permanent values are accessed. | |
1557 | */ | |
1558 | devlink_port = dev->devlink_port; | |
1559 | if (!devlink_port || !devlink_port->switch_port) | |
1560 | return -EOPNOTSUPP; | |
1561 | ||
1562 | memcpy(ppid, &devlink_port->attrs.switch_id, sizeof(*ppid)); | |
1563 | ||
1564 | return 0; | |
1565 | } |