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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
12static 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
26struct 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
32struct 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
47struct 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
53static 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
61static 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
83static 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
106static 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
128static 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
150static 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
185int 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
194size_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
203static 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
266static 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
292static bool
293devlink_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
299static bool
300devlink_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
306static 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
341static int
342devlink_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
349static int
350devlink_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
357static int
358devlink_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
364static int
365devlink_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
371static 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
412static int
413devlink_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);
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
438out:
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
446static 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,
493 devlink_linecard_index(devlink_port->linecard)))
494 goto nla_put_failure;
495
496 genlmsg_end(msg, hdr);
497 return 0;
498
499nla_put_failure_type_locked:
500 spin_unlock_bh(&devlink_port->type_lock);
501nla_put_failure:
502 genlmsg_cancel(msg, hdr);
503 return -EMSGSIZE;
504}
505
506static void devlink_port_notify(struct devlink_port *devlink_port,
507 enum devlink_command cmd)
508{
509 struct devlink *devlink = devlink_port->devlink;
510 struct devlink_obj_desc desc;
511 struct sk_buff *msg;
512 int err;
513
514 WARN_ON(cmd != DEVLINK_CMD_PORT_NEW && cmd != DEVLINK_CMD_PORT_DEL);
515
516 if (!__devl_is_registered(devlink) || !devlink_nl_notify_need(devlink))
517 return;
518
519 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
520 if (!msg)
521 return;
522
523 err = devlink_nl_port_fill(msg, devlink_port, cmd, 0, 0, 0, NULL);
524 if (err) {
525 nlmsg_free(msg);
526 return;
527 }
528
529 devlink_nl_obj_desc_init(&desc, devlink);
530 devlink_nl_obj_desc_port_set(&desc, devlink_port);
531 devlink_nl_notify_send_desc(devlink, msg, &desc);
532}
533
534static void devlink_ports_notify(struct devlink *devlink,
535 enum devlink_command cmd)
536{
537 struct devlink_port *devlink_port;
538 unsigned long port_index;
539
540 xa_for_each(&devlink->ports, port_index, devlink_port)
541 devlink_port_notify(devlink_port, cmd);
542}
543
544void devlink_ports_notify_register(struct devlink *devlink)
545{
546 devlink_ports_notify(devlink, DEVLINK_CMD_PORT_NEW);
547}
548
549void devlink_ports_notify_unregister(struct devlink *devlink)
550{
551 devlink_ports_notify(devlink, DEVLINK_CMD_PORT_DEL);
552}
553
554int devlink_nl_port_get_doit(struct sk_buff *skb, struct genl_info *info)
555{
556 struct devlink_port *devlink_port = info->user_ptr[1];
557 struct sk_buff *msg;
558 int err;
559
560 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
561 if (!msg)
562 return -ENOMEM;
563
564 err = devlink_nl_port_fill(msg, devlink_port, DEVLINK_CMD_PORT_NEW,
565 info->snd_portid, info->snd_seq, 0,
566 info->extack);
567 if (err) {
568 nlmsg_free(msg);
569 return err;
570 }
571
572 return genlmsg_reply(msg, info);
573}
574
575static int
576devlink_nl_port_get_dump_one(struct sk_buff *msg, struct devlink *devlink,
577 struct netlink_callback *cb, int flags)
578{
579 struct devlink_nl_dump_state *state = devlink_dump_state(cb);
580 struct devlink_port *devlink_port;
581 unsigned long port_index;
582 int err = 0;
583
584 xa_for_each_start(&devlink->ports, port_index, devlink_port, state->idx) {
585 err = devlink_nl_port_fill(msg, devlink_port,
586 DEVLINK_CMD_PORT_NEW,
587 NETLINK_CB(cb->skb).portid,
588 cb->nlh->nlmsg_seq, flags,
589 cb->extack);
590 if (err) {
591 state->idx = port_index;
592 break;
593 }
594 }
595
596 return err;
597}
598
599int devlink_nl_port_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb)
600{
601 return devlink_nl_dumpit(skb, cb, devlink_nl_port_get_dump_one);
602}
603
604static int devlink_port_type_set(struct devlink_port *devlink_port,
605 enum devlink_port_type port_type)
606
607{
608 int err;
609
610 if (!devlink_port->ops->port_type_set)
611 return -EOPNOTSUPP;
612
613 if (port_type == devlink_port->type)
614 return 0;
615
616 err = devlink_port->ops->port_type_set(devlink_port, port_type);
617 if (err)
618 return err;
619
620 devlink_port->desired_type = port_type;
621 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
622 return 0;
623}
624
625static int devlink_port_function_hw_addr_set(struct devlink_port *port,
626 const struct nlattr *attr,
627 struct netlink_ext_ack *extack)
628{
629 const u8 *hw_addr;
630 int hw_addr_len;
631
632 hw_addr = nla_data(attr);
633 hw_addr_len = nla_len(attr);
634 if (hw_addr_len > MAX_ADDR_LEN) {
635 NL_SET_ERR_MSG(extack, "Port function hardware address too long");
636 return -EINVAL;
637 }
638 if (port->type == DEVLINK_PORT_TYPE_ETH) {
639 if (hw_addr_len != ETH_ALEN) {
640 NL_SET_ERR_MSG(extack, "Address must be 6 bytes for Ethernet device");
641 return -EINVAL;
642 }
643 if (!is_unicast_ether_addr(hw_addr)) {
644 NL_SET_ERR_MSG(extack, "Non-unicast hardware address unsupported");
645 return -EINVAL;
646 }
647 }
648
649 return port->ops->port_fn_hw_addr_set(port, hw_addr, hw_addr_len,
650 extack);
651}
652
653static int devlink_port_fn_state_set(struct devlink_port *port,
654 const struct nlattr *attr,
655 struct netlink_ext_ack *extack)
656{
657 enum devlink_port_fn_state state;
658
659 state = nla_get_u8(attr);
660 return port->ops->port_fn_state_set(port, state, extack);
661}
662
663static int devlink_port_function_validate(struct devlink_port *devlink_port,
664 struct nlattr **tb,
665 struct netlink_ext_ack *extack)
666{
667 const struct devlink_port_ops *ops = devlink_port->ops;
668 struct nlattr *attr;
669
670 if (tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR] &&
671 !ops->port_fn_hw_addr_set) {
672 NL_SET_ERR_MSG_ATTR(extack, tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR],
673 "Port doesn't support function attributes");
674 return -EOPNOTSUPP;
675 }
676 if (tb[DEVLINK_PORT_FN_ATTR_STATE] && !ops->port_fn_state_set) {
677 NL_SET_ERR_MSG_ATTR(extack, tb[DEVLINK_PORT_FN_ATTR_STATE],
678 "Function does not support state setting");
679 return -EOPNOTSUPP;
680 }
681 attr = tb[DEVLINK_PORT_FN_ATTR_CAPS];
682 if (attr) {
683 struct nla_bitfield32 caps;
684
685 caps = nla_get_bitfield32(attr);
686 if (caps.selector & DEVLINK_PORT_FN_CAP_ROCE &&
687 !ops->port_fn_roce_set) {
688 NL_SET_ERR_MSG_ATTR(extack, attr,
689 "Port doesn't support RoCE function attribute");
690 return -EOPNOTSUPP;
691 }
692 if (caps.selector & DEVLINK_PORT_FN_CAP_MIGRATABLE) {
693 if (!ops->port_fn_migratable_set) {
694 NL_SET_ERR_MSG_ATTR(extack, attr,
695 "Port doesn't support migratable function attribute");
696 return -EOPNOTSUPP;
697 }
698 if (devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF) {
699 NL_SET_ERR_MSG_ATTR(extack, attr,
700 "migratable function attribute supported for VFs only");
701 return -EOPNOTSUPP;
702 }
703 }
704 if (caps.selector & DEVLINK_PORT_FN_CAP_IPSEC_CRYPTO) {
705 if (!ops->port_fn_ipsec_crypto_set) {
706 NL_SET_ERR_MSG_ATTR(extack, attr,
707 "Port doesn't support ipsec_crypto function attribute");
708 return -EOPNOTSUPP;
709 }
710 if (devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF) {
711 NL_SET_ERR_MSG_ATTR(extack, attr,
712 "ipsec_crypto function attribute supported for VFs only");
713 return -EOPNOTSUPP;
714 }
715 }
716 if (caps.selector & DEVLINK_PORT_FN_CAP_IPSEC_PACKET) {
717 if (!ops->port_fn_ipsec_packet_set) {
718 NL_SET_ERR_MSG_ATTR(extack, attr,
719 "Port doesn't support ipsec_packet function attribute");
720 return -EOPNOTSUPP;
721 }
722 if (devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF) {
723 NL_SET_ERR_MSG_ATTR(extack, attr,
724 "ipsec_packet function attribute supported for VFs only");
725 return -EOPNOTSUPP;
726 }
727 }
728 }
729 return 0;
730}
731
732static int devlink_port_function_set(struct devlink_port *port,
733 const struct nlattr *attr,
734 struct netlink_ext_ack *extack)
735{
736 struct nlattr *tb[DEVLINK_PORT_FUNCTION_ATTR_MAX + 1];
737 int err;
738
739 err = nla_parse_nested(tb, DEVLINK_PORT_FUNCTION_ATTR_MAX, attr,
740 devlink_function_nl_policy, extack);
741 if (err < 0) {
742 NL_SET_ERR_MSG(extack, "Fail to parse port function attributes");
743 return err;
744 }
745
746 err = devlink_port_function_validate(port, tb, extack);
747 if (err)
748 return err;
749
750 attr = tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR];
751 if (attr) {
752 err = devlink_port_function_hw_addr_set(port, attr, extack);
753 if (err)
754 return err;
755 }
756
757 attr = tb[DEVLINK_PORT_FN_ATTR_CAPS];
758 if (attr) {
759 err = devlink_port_fn_caps_set(port, attr, extack);
760 if (err)
761 return err;
762 }
763
764 /* Keep this as the last function attribute set, so that when
765 * multiple port function attributes are set along with state,
766 * Those can be applied first before activating the state.
767 */
768 attr = tb[DEVLINK_PORT_FN_ATTR_STATE];
769 if (attr)
770 err = devlink_port_fn_state_set(port, attr, extack);
771
772 if (!err)
773 devlink_port_notify(port, DEVLINK_CMD_PORT_NEW);
774 return err;
775}
776
777int devlink_nl_port_set_doit(struct sk_buff *skb, struct genl_info *info)
778{
779 struct devlink_port *devlink_port = info->user_ptr[1];
780 int err;
781
782 if (info->attrs[DEVLINK_ATTR_PORT_TYPE]) {
783 enum devlink_port_type port_type;
784
785 port_type = nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_TYPE]);
786 err = devlink_port_type_set(devlink_port, port_type);
787 if (err)
788 return err;
789 }
790
791 if (info->attrs[DEVLINK_ATTR_PORT_FUNCTION]) {
792 struct nlattr *attr = info->attrs[DEVLINK_ATTR_PORT_FUNCTION];
793 struct netlink_ext_ack *extack = info->extack;
794
795 err = devlink_port_function_set(devlink_port, attr, extack);
796 if (err)
797 return err;
798 }
799
800 return 0;
801}
802
803int devlink_nl_port_split_doit(struct sk_buff *skb, struct genl_info *info)
804{
805 struct devlink_port *devlink_port = info->user_ptr[1];
806 struct devlink *devlink = info->user_ptr[0];
807 u32 count;
808
809 if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_PORT_SPLIT_COUNT))
810 return -EINVAL;
811 if (!devlink_port->ops->port_split)
812 return -EOPNOTSUPP;
813
814 count = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT]);
815
816 if (!devlink_port->attrs.splittable) {
817 /* Split ports cannot be split. */
818 if (devlink_port->attrs.split)
819 NL_SET_ERR_MSG(info->extack, "Port cannot be split further");
820 else
821 NL_SET_ERR_MSG(info->extack, "Port cannot be split");
822 return -EINVAL;
823 }
824
825 if (count < 2 || !is_power_of_2(count) || count > devlink_port->attrs.lanes) {
826 NL_SET_ERR_MSG(info->extack, "Invalid split count");
827 return -EINVAL;
828 }
829
830 return devlink_port->ops->port_split(devlink, devlink_port, count,
831 info->extack);
832}
833
834int devlink_nl_port_unsplit_doit(struct sk_buff *skb, struct genl_info *info)
835{
836 struct devlink_port *devlink_port = info->user_ptr[1];
837 struct devlink *devlink = info->user_ptr[0];
838
839 if (!devlink_port->ops->port_unsplit)
840 return -EOPNOTSUPP;
841 return devlink_port->ops->port_unsplit(devlink, devlink_port, info->extack);
842}
843
844int devlink_nl_port_new_doit(struct sk_buff *skb, struct genl_info *info)
845{
846 struct netlink_ext_ack *extack = info->extack;
847 struct devlink_port_new_attrs new_attrs = {};
848 struct devlink *devlink = info->user_ptr[0];
849 struct devlink_port *devlink_port;
850 struct sk_buff *msg;
851 int err;
852
853 if (!devlink->ops->port_new)
854 return -EOPNOTSUPP;
855
856 if (!info->attrs[DEVLINK_ATTR_PORT_FLAVOUR] ||
857 !info->attrs[DEVLINK_ATTR_PORT_PCI_PF_NUMBER]) {
858 NL_SET_ERR_MSG(extack, "Port flavour or PCI PF are not specified");
859 return -EINVAL;
860 }
861 new_attrs.flavour = nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_FLAVOUR]);
862 new_attrs.pfnum =
863 nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_PCI_PF_NUMBER]);
864
865 if (info->attrs[DEVLINK_ATTR_PORT_INDEX]) {
866 /* Port index of the new port being created by driver. */
867 new_attrs.port_index =
868 nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
869 new_attrs.port_index_valid = true;
870 }
871 if (info->attrs[DEVLINK_ATTR_PORT_CONTROLLER_NUMBER]) {
872 new_attrs.controller =
873 nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_CONTROLLER_NUMBER]);
874 new_attrs.controller_valid = true;
875 }
876 if (new_attrs.flavour == DEVLINK_PORT_FLAVOUR_PCI_SF &&
877 info->attrs[DEVLINK_ATTR_PORT_PCI_SF_NUMBER]) {
878 new_attrs.sfnum = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_PCI_SF_NUMBER]);
879 new_attrs.sfnum_valid = true;
880 }
881
882 err = devlink->ops->port_new(devlink, &new_attrs,
883 extack, &devlink_port);
884 if (err)
885 return err;
886
887 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
888 if (!msg) {
889 err = -ENOMEM;
890 goto err_out_port_del;
891 }
892 err = devlink_nl_port_fill(msg, devlink_port, DEVLINK_CMD_NEW,
893 info->snd_portid, info->snd_seq, 0, NULL);
894 if (WARN_ON_ONCE(err))
895 goto err_out_msg_free;
896 err = genlmsg_reply(msg, info);
897 if (err)
898 goto err_out_port_del;
899 return 0;
900
901err_out_msg_free:
902 nlmsg_free(msg);
903err_out_port_del:
904 devlink_port->ops->port_del(devlink, devlink_port, NULL);
905 return err;
906}
907
908int devlink_nl_port_del_doit(struct sk_buff *skb, struct genl_info *info)
909{
910 struct devlink_port *devlink_port = info->user_ptr[1];
911 struct netlink_ext_ack *extack = info->extack;
912 struct devlink *devlink = info->user_ptr[0];
913
914 if (!devlink_port->ops->port_del)
915 return -EOPNOTSUPP;
916
917 return devlink_port->ops->port_del(devlink, devlink_port, extack);
918}
919
920static void devlink_port_type_warn(struct work_struct *work)
921{
922 struct devlink_port *port = container_of(to_delayed_work(work),
923 struct devlink_port,
924 type_warn_dw);
925 dev_warn(port->devlink->dev, "Type was not set for devlink port.");
926}
927
928static bool devlink_port_type_should_warn(struct devlink_port *devlink_port)
929{
930 /* Ignore CPU and DSA flavours. */
931 return devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_CPU &&
932 devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_DSA &&
933 devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_UNUSED;
934}
935
936#define DEVLINK_PORT_TYPE_WARN_TIMEOUT (HZ * 3600)
937
938static void devlink_port_type_warn_schedule(struct devlink_port *devlink_port)
939{
940 if (!devlink_port_type_should_warn(devlink_port))
941 return;
942 /* Schedule a work to WARN in case driver does not set port
943 * type within timeout.
944 */
945 schedule_delayed_work(&devlink_port->type_warn_dw,
946 DEVLINK_PORT_TYPE_WARN_TIMEOUT);
947}
948
949static void devlink_port_type_warn_cancel(struct devlink_port *devlink_port)
950{
951 if (!devlink_port_type_should_warn(devlink_port))
952 return;
953 cancel_delayed_work_sync(&devlink_port->type_warn_dw);
954}
955
956/**
957 * devlink_port_init() - Init devlink port
958 *
959 * @devlink: devlink
960 * @devlink_port: devlink port
961 *
962 * Initialize essential stuff that is needed for functions
963 * that may be called before devlink port registration.
964 * Call to this function is optional and not needed
965 * in case the driver does not use such functions.
966 */
967void devlink_port_init(struct devlink *devlink,
968 struct devlink_port *devlink_port)
969{
970 if (devlink_port->initialized)
971 return;
972 devlink_port->devlink = devlink;
973 INIT_LIST_HEAD(&devlink_port->region_list);
974 devlink_port->initialized = true;
975}
976EXPORT_SYMBOL_GPL(devlink_port_init);
977
978/**
979 * devlink_port_fini() - Deinitialize devlink port
980 *
981 * @devlink_port: devlink port
982 *
983 * Deinitialize essential stuff that is in use for functions
984 * that may be called after devlink port unregistration.
985 * Call to this function is optional and not needed
986 * in case the driver does not use such functions.
987 */
988void devlink_port_fini(struct devlink_port *devlink_port)
989{
990 WARN_ON(!list_empty(&devlink_port->region_list));
991}
992EXPORT_SYMBOL_GPL(devlink_port_fini);
993
994static const struct devlink_port_ops devlink_port_dummy_ops = {};
995
996/**
997 * devl_port_register_with_ops() - Register devlink port
998 *
999 * @devlink: devlink
1000 * @devlink_port: devlink port
1001 * @port_index: driver-specific numerical identifier of the port
1002 * @ops: port ops
1003 *
1004 * Register devlink port with provided port index. User can use
1005 * any indexing, even hw-related one. devlink_port structure
1006 * is convenient to be embedded inside user driver private structure.
1007 * Note that the caller should take care of zeroing the devlink_port
1008 * structure.
1009 */
1010int devl_port_register_with_ops(struct devlink *devlink,
1011 struct devlink_port *devlink_port,
1012 unsigned int port_index,
1013 const struct devlink_port_ops *ops)
1014{
1015 int err;
1016
1017 devl_assert_locked(devlink);
1018
1019 ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port);
1020
1021 devlink_port_init(devlink, devlink_port);
1022 devlink_port->registered = true;
1023 devlink_port->index = port_index;
1024 devlink_port->ops = ops ? ops : &devlink_port_dummy_ops;
1025 spin_lock_init(&devlink_port->type_lock);
1026 INIT_LIST_HEAD(&devlink_port->reporter_list);
1027 err = xa_insert(&devlink->ports, port_index, devlink_port, GFP_KERNEL);
1028 if (err) {
1029 devlink_port->registered = false;
1030 return err;
1031 }
1032
1033 INIT_DELAYED_WORK(&devlink_port->type_warn_dw, &devlink_port_type_warn);
1034 devlink_port_type_warn_schedule(devlink_port);
1035 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
1036 return 0;
1037}
1038EXPORT_SYMBOL_GPL(devl_port_register_with_ops);
1039
1040/**
1041 * devlink_port_register_with_ops - Register devlink port
1042 *
1043 * @devlink: devlink
1044 * @devlink_port: devlink port
1045 * @port_index: driver-specific numerical identifier of the port
1046 * @ops: port ops
1047 *
1048 * Register devlink port with provided port index. User can use
1049 * any indexing, even hw-related one. devlink_port structure
1050 * is convenient to be embedded inside user driver private structure.
1051 * Note that the caller should take care of zeroing the devlink_port
1052 * structure.
1053 *
1054 * Context: Takes and release devlink->lock <mutex>.
1055 */
1056int devlink_port_register_with_ops(struct devlink *devlink,
1057 struct devlink_port *devlink_port,
1058 unsigned int port_index,
1059 const struct devlink_port_ops *ops)
1060{
1061 int err;
1062
1063 devl_lock(devlink);
1064 err = devl_port_register_with_ops(devlink, devlink_port,
1065 port_index, ops);
1066 devl_unlock(devlink);
1067 return err;
1068}
1069EXPORT_SYMBOL_GPL(devlink_port_register_with_ops);
1070
1071/**
1072 * devl_port_unregister() - Unregister devlink port
1073 *
1074 * @devlink_port: devlink port
1075 */
1076void devl_port_unregister(struct devlink_port *devlink_port)
1077{
1078 lockdep_assert_held(&devlink_port->devlink->lock);
1079 WARN_ON(devlink_port->type != DEVLINK_PORT_TYPE_NOTSET);
1080
1081 devlink_port_type_warn_cancel(devlink_port);
1082 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL);
1083 xa_erase(&devlink_port->devlink->ports, devlink_port->index);
1084 WARN_ON(!list_empty(&devlink_port->reporter_list));
1085 devlink_port->registered = false;
1086}
1087EXPORT_SYMBOL_GPL(devl_port_unregister);
1088
1089/**
1090 * devlink_port_unregister - Unregister devlink port
1091 *
1092 * @devlink_port: devlink port
1093 *
1094 * Context: Takes and release devlink->lock <mutex>.
1095 */
1096void devlink_port_unregister(struct devlink_port *devlink_port)
1097{
1098 struct devlink *devlink = devlink_port->devlink;
1099
1100 devl_lock(devlink);
1101 devl_port_unregister(devlink_port);
1102 devl_unlock(devlink);
1103}
1104EXPORT_SYMBOL_GPL(devlink_port_unregister);
1105
1106static void devlink_port_type_netdev_checks(struct devlink_port *devlink_port,
1107 struct net_device *netdev)
1108{
1109 const struct net_device_ops *ops = netdev->netdev_ops;
1110
1111 /* If driver registers devlink port, it should set devlink port
1112 * attributes accordingly so the compat functions are called
1113 * and the original ops are not used.
1114 */
1115 if (ops->ndo_get_phys_port_name) {
1116 /* Some drivers use the same set of ndos for netdevs
1117 * that have devlink_port registered and also for
1118 * those who don't. Make sure that ndo_get_phys_port_name
1119 * returns -EOPNOTSUPP here in case it is defined.
1120 * Warn if not.
1121 */
1122 char name[IFNAMSIZ];
1123 int err;
1124
1125 err = ops->ndo_get_phys_port_name(netdev, name, sizeof(name));
1126 WARN_ON(err != -EOPNOTSUPP);
1127 }
1128 if (ops->ndo_get_port_parent_id) {
1129 /* Some drivers use the same set of ndos for netdevs
1130 * that have devlink_port registered and also for
1131 * those who don't. Make sure that ndo_get_port_parent_id
1132 * returns -EOPNOTSUPP here in case it is defined.
1133 * Warn if not.
1134 */
1135 struct netdev_phys_item_id ppid;
1136 int err;
1137
1138 err = ops->ndo_get_port_parent_id(netdev, &ppid);
1139 WARN_ON(err != -EOPNOTSUPP);
1140 }
1141}
1142
1143static void __devlink_port_type_set(struct devlink_port *devlink_port,
1144 enum devlink_port_type type,
1145 void *type_dev)
1146{
1147 struct net_device *netdev = type_dev;
1148
1149 ASSERT_DEVLINK_PORT_REGISTERED(devlink_port);
1150
1151 if (type == DEVLINK_PORT_TYPE_NOTSET) {
1152 devlink_port_type_warn_schedule(devlink_port);
1153 } else {
1154 devlink_port_type_warn_cancel(devlink_port);
1155 if (type == DEVLINK_PORT_TYPE_ETH && netdev)
1156 devlink_port_type_netdev_checks(devlink_port, netdev);
1157 }
1158
1159 spin_lock_bh(&devlink_port->type_lock);
1160 devlink_port->type = type;
1161 switch (type) {
1162 case DEVLINK_PORT_TYPE_ETH:
1163 devlink_port->type_eth.netdev = netdev;
1164 if (netdev) {
1165 ASSERT_RTNL();
1166 devlink_port->type_eth.ifindex = netdev->ifindex;
1167 BUILD_BUG_ON(sizeof(devlink_port->type_eth.ifname) !=
1168 sizeof(netdev->name));
1169 strcpy(devlink_port->type_eth.ifname, netdev->name);
1170 }
1171 break;
1172 case DEVLINK_PORT_TYPE_IB:
1173 devlink_port->type_ib.ibdev = type_dev;
1174 break;
1175 default:
1176 break;
1177 }
1178 spin_unlock_bh(&devlink_port->type_lock);
1179 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
1180}
1181
1182/**
1183 * devlink_port_type_eth_set - Set port type to Ethernet
1184 *
1185 * @devlink_port: devlink port
1186 *
1187 * If driver is calling this, most likely it is doing something wrong.
1188 */
1189void devlink_port_type_eth_set(struct devlink_port *devlink_port)
1190{
1191 dev_warn(devlink_port->devlink->dev,
1192 "devlink port type for port %d set to Ethernet without a software interface reference, device type not supported by the kernel?\n",
1193 devlink_port->index);
1194 __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_ETH, NULL);
1195}
1196EXPORT_SYMBOL_GPL(devlink_port_type_eth_set);
1197
1198/**
1199 * devlink_port_type_ib_set - Set port type to InfiniBand
1200 *
1201 * @devlink_port: devlink port
1202 * @ibdev: related IB device
1203 */
1204void devlink_port_type_ib_set(struct devlink_port *devlink_port,
1205 struct ib_device *ibdev)
1206{
1207 __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_IB, ibdev);
1208}
1209EXPORT_SYMBOL_GPL(devlink_port_type_ib_set);
1210
1211/**
1212 * devlink_port_type_clear - Clear port type
1213 *
1214 * @devlink_port: devlink port
1215 *
1216 * If driver is calling this for clearing Ethernet type, most likely
1217 * it is doing something wrong.
1218 */
1219void devlink_port_type_clear(struct devlink_port *devlink_port)
1220{
1221 if (devlink_port->type == DEVLINK_PORT_TYPE_ETH)
1222 dev_warn(devlink_port->devlink->dev,
1223 "devlink port type for port %d cleared without a software interface reference, device type not supported by the kernel?\n",
1224 devlink_port->index);
1225 __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_NOTSET, NULL);
1226}
1227EXPORT_SYMBOL_GPL(devlink_port_type_clear);
1228
1229int devlink_port_netdevice_event(struct notifier_block *nb,
1230 unsigned long event, void *ptr)
1231{
1232 struct net_device *netdev = netdev_notifier_info_to_dev(ptr);
1233 struct devlink_port *devlink_port = netdev->devlink_port;
1234 struct devlink *devlink;
1235
1236 if (!devlink_port)
1237 return NOTIFY_OK;
1238 devlink = devlink_port->devlink;
1239
1240 switch (event) {
1241 case NETDEV_POST_INIT:
1242 /* Set the type but not netdev pointer. It is going to be set
1243 * later on by NETDEV_REGISTER event. Happens once during
1244 * netdevice register
1245 */
1246 __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_ETH,
1247 NULL);
1248 break;
1249 case NETDEV_REGISTER:
1250 case NETDEV_CHANGENAME:
1251 if (devlink_net(devlink) != dev_net(netdev))
1252 return NOTIFY_OK;
1253 /* Set the netdev on top of previously set type. Note this
1254 * event happens also during net namespace change so here
1255 * we take into account netdev pointer appearing in this
1256 * namespace.
1257 */
1258 __devlink_port_type_set(devlink_port, devlink_port->type,
1259 netdev);
1260 break;
1261 case NETDEV_UNREGISTER:
1262 if (devlink_net(devlink) != dev_net(netdev))
1263 return NOTIFY_OK;
1264 /* Clear netdev pointer, but not the type. This event happens
1265 * also during net namespace change so we need to clear
1266 * pointer to netdev that is going to another net namespace.
1267 */
1268 __devlink_port_type_set(devlink_port, devlink_port->type,
1269 NULL);
1270 break;
1271 case NETDEV_PRE_UNINIT:
1272 /* Clear the type and the netdev pointer. Happens one during
1273 * netdevice unregister.
1274 */
1275 __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_NOTSET,
1276 NULL);
1277 break;
1278 }
1279
1280 return NOTIFY_OK;
1281}
1282
1283static int __devlink_port_attrs_set(struct devlink_port *devlink_port,
1284 enum devlink_port_flavour flavour)
1285{
1286 struct devlink_port_attrs *attrs = &devlink_port->attrs;
1287
1288 devlink_port->attrs_set = true;
1289 attrs->flavour = flavour;
1290 if (attrs->switch_id.id_len) {
1291 devlink_port->switch_port = true;
1292 if (WARN_ON(attrs->switch_id.id_len > MAX_PHYS_ITEM_ID_LEN))
1293 attrs->switch_id.id_len = MAX_PHYS_ITEM_ID_LEN;
1294 } else {
1295 devlink_port->switch_port = false;
1296 }
1297 return 0;
1298}
1299
1300/**
1301 * devlink_port_attrs_set - Set port attributes
1302 *
1303 * @devlink_port: devlink port
1304 * @attrs: devlink port attrs
1305 */
1306void devlink_port_attrs_set(struct devlink_port *devlink_port,
1307 struct devlink_port_attrs *attrs)
1308{
1309 int ret;
1310
1311 ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port);
1312
1313 devlink_port->attrs = *attrs;
1314 ret = __devlink_port_attrs_set(devlink_port, attrs->flavour);
1315 if (ret)
1316 return;
1317 WARN_ON(attrs->splittable && attrs->split);
1318}
1319EXPORT_SYMBOL_GPL(devlink_port_attrs_set);
1320
1321/**
1322 * devlink_port_attrs_pci_pf_set - Set PCI PF port attributes
1323 *
1324 * @devlink_port: devlink port
1325 * @controller: associated controller number for the devlink port instance
1326 * @pf: associated PF for the devlink port instance
1327 * @external: indicates if the port is for an external controller
1328 */
1329void devlink_port_attrs_pci_pf_set(struct devlink_port *devlink_port, u32 controller,
1330 u16 pf, bool external)
1331{
1332 struct devlink_port_attrs *attrs = &devlink_port->attrs;
1333 int ret;
1334
1335 ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port);
1336
1337 ret = __devlink_port_attrs_set(devlink_port,
1338 DEVLINK_PORT_FLAVOUR_PCI_PF);
1339 if (ret)
1340 return;
1341 attrs->pci_pf.controller = controller;
1342 attrs->pci_pf.pf = pf;
1343 attrs->pci_pf.external = external;
1344}
1345EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_pf_set);
1346
1347/**
1348 * devlink_port_attrs_pci_vf_set - Set PCI VF port attributes
1349 *
1350 * @devlink_port: devlink port
1351 * @controller: associated controller number for the devlink port instance
1352 * @pf: associated PF for the devlink port instance
1353 * @vf: associated VF of a PF for the devlink port instance
1354 * @external: indicates if the port is for an external controller
1355 */
1356void devlink_port_attrs_pci_vf_set(struct devlink_port *devlink_port, u32 controller,
1357 u16 pf, u16 vf, bool external)
1358{
1359 struct devlink_port_attrs *attrs = &devlink_port->attrs;
1360 int ret;
1361
1362 ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port);
1363
1364 ret = __devlink_port_attrs_set(devlink_port,
1365 DEVLINK_PORT_FLAVOUR_PCI_VF);
1366 if (ret)
1367 return;
1368 attrs->pci_vf.controller = controller;
1369 attrs->pci_vf.pf = pf;
1370 attrs->pci_vf.vf = vf;
1371 attrs->pci_vf.external = external;
1372}
1373EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_vf_set);
1374
1375/**
1376 * devlink_port_attrs_pci_sf_set - Set PCI SF port attributes
1377 *
1378 * @devlink_port: devlink port
1379 * @controller: associated controller number for the devlink port instance
1380 * @pf: associated PF for the devlink port instance
1381 * @sf: associated SF of a PF for the devlink port instance
1382 * @external: indicates if the port is for an external controller
1383 */
1384void devlink_port_attrs_pci_sf_set(struct devlink_port *devlink_port, u32 controller,
1385 u16 pf, u32 sf, bool external)
1386{
1387 struct devlink_port_attrs *attrs = &devlink_port->attrs;
1388 int ret;
1389
1390 ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port);
1391
1392 ret = __devlink_port_attrs_set(devlink_port,
1393 DEVLINK_PORT_FLAVOUR_PCI_SF);
1394 if (ret)
1395 return;
1396 attrs->pci_sf.controller = controller;
1397 attrs->pci_sf.pf = pf;
1398 attrs->pci_sf.sf = sf;
1399 attrs->pci_sf.external = external;
1400}
1401EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_sf_set);
1402
1403static void devlink_port_rel_notify_cb(struct devlink *devlink, u32 port_index)
1404{
1405 struct devlink_port *devlink_port;
1406
1407 devlink_port = devlink_port_get_by_index(devlink, port_index);
1408 if (!devlink_port)
1409 return;
1410 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
1411}
1412
1413static void devlink_port_rel_cleanup_cb(struct devlink *devlink, u32 port_index,
1414 u32 rel_index)
1415{
1416 struct devlink_port *devlink_port;
1417
1418 devlink_port = devlink_port_get_by_index(devlink, port_index);
1419 if (devlink_port && devlink_port->rel_index == rel_index)
1420 devlink_port->rel_index = 0;
1421}
1422
1423/**
1424 * devl_port_fn_devlink_set - Attach peer devlink
1425 * instance to port function.
1426 * @devlink_port: devlink port
1427 * @fn_devlink: devlink instance to attach
1428 */
1429int devl_port_fn_devlink_set(struct devlink_port *devlink_port,
1430 struct devlink *fn_devlink)
1431{
1432 ASSERT_DEVLINK_PORT_REGISTERED(devlink_port);
1433
1434 if (WARN_ON(devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_SF ||
1435 devlink_port->attrs.pci_sf.external))
1436 return -EINVAL;
1437
1438 return devlink_rel_nested_in_add(&devlink_port->rel_index,
1439 devlink_port->devlink->index,
1440 devlink_port->index,
1441 devlink_port_rel_notify_cb,
1442 devlink_port_rel_cleanup_cb,
1443 fn_devlink);
1444}
1445EXPORT_SYMBOL_GPL(devl_port_fn_devlink_set);
1446
1447/**
1448 * devlink_port_linecard_set - Link port with a linecard
1449 *
1450 * @devlink_port: devlink port
1451 * @linecard: devlink linecard
1452 */
1453void devlink_port_linecard_set(struct devlink_port *devlink_port,
1454 struct devlink_linecard *linecard)
1455{
1456 ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port);
1457
1458 devlink_port->linecard = linecard;
1459}
1460EXPORT_SYMBOL_GPL(devlink_port_linecard_set);
1461
1462static int __devlink_port_phys_port_name_get(struct devlink_port *devlink_port,
1463 char *name, size_t len)
1464{
1465 struct devlink_port_attrs *attrs = &devlink_port->attrs;
1466 int n = 0;
1467
1468 if (!devlink_port->attrs_set)
1469 return -EOPNOTSUPP;
1470
1471 switch (attrs->flavour) {
1472 case DEVLINK_PORT_FLAVOUR_PHYSICAL:
1473 if (devlink_port->linecard)
1474 n = snprintf(name, len, "l%u",
1475 devlink_linecard_index(devlink_port->linecard));
1476 if (n < len)
1477 n += snprintf(name + n, len - n, "p%u",
1478 attrs->phys.port_number);
1479 if (n < len && attrs->split)
1480 n += snprintf(name + n, len - n, "s%u",
1481 attrs->phys.split_subport_number);
1482 break;
1483 case DEVLINK_PORT_FLAVOUR_CPU:
1484 case DEVLINK_PORT_FLAVOUR_DSA:
1485 case DEVLINK_PORT_FLAVOUR_UNUSED:
1486 /* As CPU and DSA ports do not have a netdevice associated
1487 * case should not ever happen.
1488 */
1489 WARN_ON(1);
1490 return -EINVAL;
1491 case DEVLINK_PORT_FLAVOUR_PCI_PF:
1492 if (attrs->pci_pf.external) {
1493 n = snprintf(name, len, "c%u", attrs->pci_pf.controller);
1494 if (n >= len)
1495 return -EINVAL;
1496 len -= n;
1497 name += n;
1498 }
1499 n = snprintf(name, len, "pf%u", attrs->pci_pf.pf);
1500 break;
1501 case DEVLINK_PORT_FLAVOUR_PCI_VF:
1502 if (attrs->pci_vf.external) {
1503 n = snprintf(name, len, "c%u", attrs->pci_vf.controller);
1504 if (n >= len)
1505 return -EINVAL;
1506 len -= n;
1507 name += n;
1508 }
1509 n = snprintf(name, len, "pf%uvf%u",
1510 attrs->pci_vf.pf, attrs->pci_vf.vf);
1511 break;
1512 case DEVLINK_PORT_FLAVOUR_PCI_SF:
1513 if (attrs->pci_sf.external) {
1514 n = snprintf(name, len, "c%u", attrs->pci_sf.controller);
1515 if (n >= len)
1516 return -EINVAL;
1517 len -= n;
1518 name += n;
1519 }
1520 n = snprintf(name, len, "pf%usf%u", attrs->pci_sf.pf,
1521 attrs->pci_sf.sf);
1522 break;
1523 case DEVLINK_PORT_FLAVOUR_VIRTUAL:
1524 return -EOPNOTSUPP;
1525 }
1526
1527 if (n >= len)
1528 return -EINVAL;
1529
1530 return 0;
1531}
1532
1533int devlink_compat_phys_port_name_get(struct net_device *dev,
1534 char *name, size_t len)
1535{
1536 struct devlink_port *devlink_port;
1537
1538 /* RTNL mutex is held here which ensures that devlink_port
1539 * instance cannot disappear in the middle. No need to take
1540 * any devlink lock as only permanent values are accessed.
1541 */
1542 ASSERT_RTNL();
1543
1544 devlink_port = dev->devlink_port;
1545 if (!devlink_port)
1546 return -EOPNOTSUPP;
1547
1548 return __devlink_port_phys_port_name_get(devlink_port, name, len);
1549}
1550
1551int devlink_compat_switch_id_get(struct net_device *dev,
1552 struct netdev_phys_item_id *ppid)
1553{
1554 struct devlink_port *devlink_port;
1555
1556 /* Caller must hold RTNL mutex or reference to dev, which ensures that
1557 * devlink_port instance cannot disappear in the middle. No need to take
1558 * any devlink lock as only permanent values are accessed.
1559 */
1560 devlink_port = dev->devlink_port;
1561 if (!devlink_port || !devlink_port->switch_port)
1562 return -EOPNOTSUPP;
1563
1564 memcpy(ppid, &devlink_port->attrs.switch_id, sizeof(*ppid));
1565
1566 return 0;
1567}