2 * Copyright (c) 2018 Cumulus Networks. All rights reserved.
3 * Copyright (c) 2018 David Ahern <dsa@cumulusnetworks.com>
4 * Copyright (c) 2019 Mellanox Technologies. All rights reserved.
6 * This software is licensed under the GNU General License Version 2,
7 * June 1991 as shown in the file COPYING in the top-level directory of this
10 * THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS"
11 * WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
12 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
13 * FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE
14 * OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME
15 * THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
18 #include <linux/debugfs.h>
19 #include <linux/device.h>
20 #include <linux/etherdevice.h>
21 #include <linux/inet.h>
22 #include <linux/jiffies.h>
23 #include <linux/kernel.h>
24 #include <linux/list.h>
25 #include <linux/mutex.h>
26 #include <linux/random.h>
27 #include <linux/rtnetlink.h>
28 #include <linux/workqueue.h>
29 #include <net/devlink.h>
31 #include <net/flow_offload.h>
32 #include <uapi/linux/devlink.h>
33 #include <uapi/linux/ip.h>
34 #include <uapi/linux/udp.h>
36 #include "netdevsim.h"
38 static struct dentry *nsim_dev_ddir;
40 #define NSIM_DEV_DUMMY_REGION_SIZE (1024 * 32)
43 nsim_dev_take_snapshot(struct devlink *devlink,
44 const struct devlink_region_ops *ops,
45 struct netlink_ext_ack *extack,
50 dummy_data = kmalloc(NSIM_DEV_DUMMY_REGION_SIZE, GFP_KERNEL);
54 get_random_bytes(dummy_data, NSIM_DEV_DUMMY_REGION_SIZE);
61 static ssize_t nsim_dev_take_snapshot_write(struct file *file,
62 const char __user *data,
63 size_t count, loff_t *ppos)
65 struct nsim_dev *nsim_dev = file->private_data;
66 struct devlink *devlink;
71 devlink = priv_to_devlink(nsim_dev);
73 err = nsim_dev_take_snapshot(devlink, NULL, NULL, &dummy_data);
77 err = devlink_region_snapshot_id_get(devlink, &id);
79 pr_err("Failed to get snapshot id\n");
83 err = devlink_region_snapshot_create(nsim_dev->dummy_region,
85 devlink_region_snapshot_id_put(devlink, id);
87 pr_err("Failed to create region snapshot\n");
95 static const struct file_operations nsim_dev_take_snapshot_fops = {
97 .write = nsim_dev_take_snapshot_write,
98 .llseek = generic_file_llseek,
101 static ssize_t nsim_dev_trap_fa_cookie_read(struct file *file,
103 size_t count, loff_t *ppos)
105 struct nsim_dev *nsim_dev = file->private_data;
106 struct flow_action_cookie *fa_cookie;
107 unsigned int buf_len;
111 spin_lock(&nsim_dev->fa_cookie_lock);
112 fa_cookie = nsim_dev->fa_cookie;
117 buf_len = fa_cookie->cookie_len * 2;
118 buf = kmalloc(buf_len, GFP_ATOMIC);
123 bin2hex(buf, fa_cookie->cookie, fa_cookie->cookie_len);
124 spin_unlock(&nsim_dev->fa_cookie_lock);
126 ret = simple_read_from_buffer(data, count, ppos, buf, buf_len);
132 spin_unlock(&nsim_dev->fa_cookie_lock);
136 static ssize_t nsim_dev_trap_fa_cookie_write(struct file *file,
137 const char __user *data,
138 size_t count, loff_t *ppos)
140 struct nsim_dev *nsim_dev = file->private_data;
141 struct flow_action_cookie *fa_cookie;
148 cookie_len = (count - 1) / 2;
151 buf = kmalloc(count, GFP_KERNEL | __GFP_NOWARN);
155 ret = simple_write_to_buffer(buf, count, ppos, data, count);
159 fa_cookie = kmalloc(sizeof(*fa_cookie) + cookie_len,
160 GFP_KERNEL | __GFP_NOWARN);
166 fa_cookie->cookie_len = cookie_len;
167 ret = hex2bin(fa_cookie->cookie, buf, cookie_len);
172 spin_lock(&nsim_dev->fa_cookie_lock);
173 kfree(nsim_dev->fa_cookie);
174 nsim_dev->fa_cookie = fa_cookie;
175 spin_unlock(&nsim_dev->fa_cookie_lock);
186 static const struct file_operations nsim_dev_trap_fa_cookie_fops = {
188 .read = nsim_dev_trap_fa_cookie_read,
189 .write = nsim_dev_trap_fa_cookie_write,
190 .llseek = generic_file_llseek,
193 static int nsim_dev_debugfs_init(struct nsim_dev *nsim_dev)
195 char dev_ddir_name[sizeof(DRV_NAME) + 10];
197 sprintf(dev_ddir_name, DRV_NAME "%u", nsim_dev->nsim_bus_dev->dev.id);
198 nsim_dev->ddir = debugfs_create_dir(dev_ddir_name, nsim_dev_ddir);
199 if (IS_ERR(nsim_dev->ddir))
200 return PTR_ERR(nsim_dev->ddir);
201 nsim_dev->ports_ddir = debugfs_create_dir("ports", nsim_dev->ddir);
202 if (IS_ERR(nsim_dev->ports_ddir))
203 return PTR_ERR(nsim_dev->ports_ddir);
204 debugfs_create_bool("fw_update_status", 0600, nsim_dev->ddir,
205 &nsim_dev->fw_update_status);
206 debugfs_create_u32("fw_update_overwrite_mask", 0600, nsim_dev->ddir,
207 &nsim_dev->fw_update_overwrite_mask);
208 debugfs_create_u32("max_macs", 0600, nsim_dev->ddir,
209 &nsim_dev->max_macs);
210 debugfs_create_bool("test1", 0600, nsim_dev->ddir,
212 nsim_dev->take_snapshot = debugfs_create_file("take_snapshot",
216 &nsim_dev_take_snapshot_fops);
217 debugfs_create_bool("dont_allow_reload", 0600, nsim_dev->ddir,
218 &nsim_dev->dont_allow_reload);
219 debugfs_create_bool("fail_reload", 0600, nsim_dev->ddir,
220 &nsim_dev->fail_reload);
221 debugfs_create_file("trap_flow_action_cookie", 0600, nsim_dev->ddir,
222 nsim_dev, &nsim_dev_trap_fa_cookie_fops);
223 debugfs_create_bool("fail_trap_group_set", 0600,
225 &nsim_dev->fail_trap_group_set);
226 debugfs_create_bool("fail_trap_policer_set", 0600,
228 &nsim_dev->fail_trap_policer_set);
229 debugfs_create_bool("fail_trap_policer_counter_get", 0600,
231 &nsim_dev->fail_trap_policer_counter_get);
232 nsim_udp_tunnels_debugfs_create(nsim_dev);
236 static void nsim_dev_debugfs_exit(struct nsim_dev *nsim_dev)
238 debugfs_remove_recursive(nsim_dev->ports_ddir);
239 debugfs_remove_recursive(nsim_dev->ddir);
242 static int nsim_dev_port_debugfs_init(struct nsim_dev *nsim_dev,
243 struct nsim_dev_port *nsim_dev_port)
245 char port_ddir_name[16];
246 char dev_link_name[32];
248 sprintf(port_ddir_name, "%u", nsim_dev_port->port_index);
249 nsim_dev_port->ddir = debugfs_create_dir(port_ddir_name,
250 nsim_dev->ports_ddir);
251 if (IS_ERR(nsim_dev_port->ddir))
252 return PTR_ERR(nsim_dev_port->ddir);
254 sprintf(dev_link_name, "../../../" DRV_NAME "%u",
255 nsim_dev->nsim_bus_dev->dev.id);
256 debugfs_create_symlink("dev", nsim_dev_port->ddir, dev_link_name);
261 static void nsim_dev_port_debugfs_exit(struct nsim_dev_port *nsim_dev_port)
263 debugfs_remove_recursive(nsim_dev_port->ddir);
266 static int nsim_dev_resources_register(struct devlink *devlink)
268 struct devlink_resource_size_params params = {
270 .size_granularity = 1,
271 .unit = DEVLINK_RESOURCE_UNIT_ENTRY
275 /* Resources for IPv4 */
276 err = devlink_resource_register(devlink, "IPv4", (u64)-1,
278 DEVLINK_RESOURCE_ID_PARENT_TOP,
281 pr_err("Failed to register IPv4 top resource\n");
285 err = devlink_resource_register(devlink, "fib", (u64)-1,
286 NSIM_RESOURCE_IPV4_FIB,
287 NSIM_RESOURCE_IPV4, ¶ms);
289 pr_err("Failed to register IPv4 FIB resource\n");
293 err = devlink_resource_register(devlink, "fib-rules", (u64)-1,
294 NSIM_RESOURCE_IPV4_FIB_RULES,
295 NSIM_RESOURCE_IPV4, ¶ms);
297 pr_err("Failed to register IPv4 FIB rules resource\n");
301 /* Resources for IPv6 */
302 err = devlink_resource_register(devlink, "IPv6", (u64)-1,
304 DEVLINK_RESOURCE_ID_PARENT_TOP,
307 pr_err("Failed to register IPv6 top resource\n");
311 err = devlink_resource_register(devlink, "fib", (u64)-1,
312 NSIM_RESOURCE_IPV6_FIB,
313 NSIM_RESOURCE_IPV6, ¶ms);
315 pr_err("Failed to register IPv6 FIB resource\n");
319 err = devlink_resource_register(devlink, "fib-rules", (u64)-1,
320 NSIM_RESOURCE_IPV6_FIB_RULES,
321 NSIM_RESOURCE_IPV6, ¶ms);
323 pr_err("Failed to register IPv6 FIB rules resource\n");
331 enum nsim_devlink_param_id {
332 NSIM_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX,
333 NSIM_DEVLINK_PARAM_ID_TEST1,
336 static const struct devlink_param nsim_devlink_params[] = {
337 DEVLINK_PARAM_GENERIC(MAX_MACS,
338 BIT(DEVLINK_PARAM_CMODE_DRIVERINIT),
340 DEVLINK_PARAM_DRIVER(NSIM_DEVLINK_PARAM_ID_TEST1,
341 "test1", DEVLINK_PARAM_TYPE_BOOL,
342 BIT(DEVLINK_PARAM_CMODE_DRIVERINIT),
346 static void nsim_devlink_set_params_init_values(struct nsim_dev *nsim_dev,
347 struct devlink *devlink)
349 union devlink_param_value value;
351 value.vu32 = nsim_dev->max_macs;
352 devlink_param_driverinit_value_set(devlink,
353 DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
355 value.vbool = nsim_dev->test1;
356 devlink_param_driverinit_value_set(devlink,
357 NSIM_DEVLINK_PARAM_ID_TEST1,
361 static void nsim_devlink_param_load_driverinit_values(struct devlink *devlink)
363 struct nsim_dev *nsim_dev = devlink_priv(devlink);
364 union devlink_param_value saved_value;
367 err = devlink_param_driverinit_value_get(devlink,
368 DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
371 nsim_dev->max_macs = saved_value.vu32;
372 err = devlink_param_driverinit_value_get(devlink,
373 NSIM_DEVLINK_PARAM_ID_TEST1,
376 nsim_dev->test1 = saved_value.vbool;
379 #define NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX 16
381 static const struct devlink_region_ops dummy_region_ops = {
383 .destructor = &kfree,
384 .snapshot = nsim_dev_take_snapshot,
387 static int nsim_dev_dummy_region_init(struct nsim_dev *nsim_dev,
388 struct devlink *devlink)
390 nsim_dev->dummy_region =
391 devlink_region_create(devlink, &dummy_region_ops,
392 NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX,
393 NSIM_DEV_DUMMY_REGION_SIZE);
394 return PTR_ERR_OR_ZERO(nsim_dev->dummy_region);
397 static void nsim_dev_dummy_region_exit(struct nsim_dev *nsim_dev)
399 devlink_region_destroy(nsim_dev->dummy_region);
402 struct nsim_trap_item {
404 enum devlink_trap_action action;
407 struct nsim_trap_data {
408 struct delayed_work trap_report_dw;
409 struct nsim_trap_item *trap_items_arr;
410 u64 *trap_policers_cnt_arr;
411 struct nsim_dev *nsim_dev;
412 spinlock_t trap_lock; /* Protects trap_items_arr */
415 /* All driver-specific traps must be documented in
416 * Documentation/networking/devlink/netdevsim.rst
419 NSIM_TRAP_ID_BASE = DEVLINK_TRAP_GENERIC_ID_MAX,
420 NSIM_TRAP_ID_FID_MISS,
423 #define NSIM_TRAP_NAME_FID_MISS "fid_miss"
425 #define NSIM_TRAP_METADATA DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT
427 #define NSIM_TRAP_DROP(_id, _group_id) \
428 DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \
429 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \
431 #define NSIM_TRAP_DROP_EXT(_id, _group_id, _metadata) \
432 DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \
433 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \
434 NSIM_TRAP_METADATA | (_metadata))
435 #define NSIM_TRAP_EXCEPTION(_id, _group_id) \
436 DEVLINK_TRAP_GENERIC(EXCEPTION, TRAP, _id, \
437 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \
439 #define NSIM_TRAP_CONTROL(_id, _group_id, _action) \
440 DEVLINK_TRAP_GENERIC(CONTROL, _action, _id, \
441 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \
443 #define NSIM_TRAP_DRIVER_EXCEPTION(_id, _group_id) \
444 DEVLINK_TRAP_DRIVER(EXCEPTION, TRAP, NSIM_TRAP_ID_##_id, \
445 NSIM_TRAP_NAME_##_id, \
446 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \
449 #define NSIM_DEV_TRAP_POLICER_MIN_RATE 1
450 #define NSIM_DEV_TRAP_POLICER_MAX_RATE 8000
451 #define NSIM_DEV_TRAP_POLICER_MIN_BURST 8
452 #define NSIM_DEV_TRAP_POLICER_MAX_BURST 65536
454 #define NSIM_TRAP_POLICER(_id, _rate, _burst) \
455 DEVLINK_TRAP_POLICER(_id, _rate, _burst, \
456 NSIM_DEV_TRAP_POLICER_MAX_RATE, \
457 NSIM_DEV_TRAP_POLICER_MIN_RATE, \
458 NSIM_DEV_TRAP_POLICER_MAX_BURST, \
459 NSIM_DEV_TRAP_POLICER_MIN_BURST)
461 static const struct devlink_trap_policer nsim_trap_policers_arr[] = {
462 NSIM_TRAP_POLICER(1, 1000, 128),
463 NSIM_TRAP_POLICER(2, 2000, 256),
464 NSIM_TRAP_POLICER(3, 3000, 512),
467 static const struct devlink_trap_group nsim_trap_groups_arr[] = {
468 DEVLINK_TRAP_GROUP_GENERIC(L2_DROPS, 0),
469 DEVLINK_TRAP_GROUP_GENERIC(L3_DROPS, 1),
470 DEVLINK_TRAP_GROUP_GENERIC(L3_EXCEPTIONS, 1),
471 DEVLINK_TRAP_GROUP_GENERIC(BUFFER_DROPS, 2),
472 DEVLINK_TRAP_GROUP_GENERIC(ACL_DROPS, 3),
473 DEVLINK_TRAP_GROUP_GENERIC(MC_SNOOPING, 3),
476 static const struct devlink_trap nsim_traps_arr[] = {
477 NSIM_TRAP_DROP(SMAC_MC, L2_DROPS),
478 NSIM_TRAP_DROP(VLAN_TAG_MISMATCH, L2_DROPS),
479 NSIM_TRAP_DROP(INGRESS_VLAN_FILTER, L2_DROPS),
480 NSIM_TRAP_DROP(INGRESS_STP_FILTER, L2_DROPS),
481 NSIM_TRAP_DROP(EMPTY_TX_LIST, L2_DROPS),
482 NSIM_TRAP_DROP(PORT_LOOPBACK_FILTER, L2_DROPS),
483 NSIM_TRAP_DRIVER_EXCEPTION(FID_MISS, L2_DROPS),
484 NSIM_TRAP_DROP(BLACKHOLE_ROUTE, L3_DROPS),
485 NSIM_TRAP_EXCEPTION(TTL_ERROR, L3_EXCEPTIONS),
486 NSIM_TRAP_DROP(TAIL_DROP, BUFFER_DROPS),
487 NSIM_TRAP_DROP_EXT(INGRESS_FLOW_ACTION_DROP, ACL_DROPS,
488 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE),
489 NSIM_TRAP_DROP_EXT(EGRESS_FLOW_ACTION_DROP, ACL_DROPS,
490 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE),
491 NSIM_TRAP_CONTROL(IGMP_QUERY, MC_SNOOPING, MIRROR),
492 NSIM_TRAP_CONTROL(IGMP_V1_REPORT, MC_SNOOPING, TRAP),
495 #define NSIM_TRAP_L4_DATA_LEN 100
497 static struct sk_buff *nsim_dev_trap_skb_build(void)
499 int tot_len, data_len = NSIM_TRAP_L4_DATA_LEN;
505 skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
508 tot_len = sizeof(struct iphdr) + sizeof(struct udphdr) + data_len;
510 skb_reset_mac_header(skb);
511 eth = skb_put(skb, sizeof(struct ethhdr));
512 eth_random_addr(eth->h_dest);
513 eth_random_addr(eth->h_source);
514 eth->h_proto = htons(ETH_P_IP);
515 skb->protocol = htons(ETH_P_IP);
517 skb_set_network_header(skb, skb->len);
518 iph = skb_put(skb, sizeof(struct iphdr));
519 iph->protocol = IPPROTO_UDP;
520 iph->saddr = in_aton("192.0.2.1");
521 iph->daddr = in_aton("198.51.100.1");
525 iph->tot_len = htons(tot_len);
528 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
530 skb_set_transport_header(skb, skb->len);
531 udph = skb_put_zero(skb, sizeof(struct udphdr) + data_len);
532 get_random_bytes(&udph->source, sizeof(u16));
533 get_random_bytes(&udph->dest, sizeof(u16));
534 udph->len = htons(sizeof(struct udphdr) + data_len);
539 static void nsim_dev_trap_report(struct nsim_dev_port *nsim_dev_port)
541 struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev;
542 struct devlink *devlink = priv_to_devlink(nsim_dev);
543 struct nsim_trap_data *nsim_trap_data;
546 nsim_trap_data = nsim_dev->trap_data;
548 spin_lock(&nsim_trap_data->trap_lock);
549 for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) {
550 struct flow_action_cookie *fa_cookie = NULL;
551 struct nsim_trap_item *nsim_trap_item;
555 has_fa_cookie = nsim_traps_arr[i].metadata_cap &
556 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE;
558 nsim_trap_item = &nsim_trap_data->trap_items_arr[i];
559 if (nsim_trap_item->action == DEVLINK_TRAP_ACTION_DROP)
562 skb = nsim_dev_trap_skb_build();
565 skb->dev = nsim_dev_port->ns->netdev;
567 /* Trapped packets are usually passed to devlink in softIRQ,
568 * but in this case they are generated in a workqueue. Disable
569 * softIRQs to prevent lockdep from complaining about
570 * "incosistent lock state".
573 spin_lock_bh(&nsim_dev->fa_cookie_lock);
574 fa_cookie = has_fa_cookie ? nsim_dev->fa_cookie : NULL;
575 devlink_trap_report(devlink, skb, nsim_trap_item->trap_ctx,
576 &nsim_dev_port->devlink_port, fa_cookie);
577 spin_unlock_bh(&nsim_dev->fa_cookie_lock);
580 spin_unlock(&nsim_trap_data->trap_lock);
583 #define NSIM_TRAP_REPORT_INTERVAL_MS 100
585 static void nsim_dev_trap_report_work(struct work_struct *work)
587 struct nsim_trap_data *nsim_trap_data;
588 struct nsim_dev_port *nsim_dev_port;
589 struct nsim_dev *nsim_dev;
591 nsim_trap_data = container_of(work, struct nsim_trap_data,
592 trap_report_dw.work);
593 nsim_dev = nsim_trap_data->nsim_dev;
595 /* For each running port and enabled packet trap, generate a UDP
596 * packet with a random 5-tuple and report it.
598 mutex_lock(&nsim_dev->port_list_lock);
599 list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list) {
600 if (!netif_running(nsim_dev_port->ns->netdev))
603 nsim_dev_trap_report(nsim_dev_port);
605 mutex_unlock(&nsim_dev->port_list_lock);
607 schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw,
608 msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS));
611 static int nsim_dev_traps_init(struct devlink *devlink)
613 size_t policers_count = ARRAY_SIZE(nsim_trap_policers_arr);
614 struct nsim_dev *nsim_dev = devlink_priv(devlink);
615 struct nsim_trap_data *nsim_trap_data;
618 nsim_trap_data = kzalloc(sizeof(*nsim_trap_data), GFP_KERNEL);
622 nsim_trap_data->trap_items_arr = kcalloc(ARRAY_SIZE(nsim_traps_arr),
623 sizeof(struct nsim_trap_item),
625 if (!nsim_trap_data->trap_items_arr) {
627 goto err_trap_data_free;
630 nsim_trap_data->trap_policers_cnt_arr = kcalloc(policers_count,
633 if (!nsim_trap_data->trap_policers_cnt_arr) {
635 goto err_trap_items_free;
638 /* The lock is used to protect the action state of the registered
639 * traps. The value is written by user and read in delayed work when
640 * iterating over all the traps.
642 spin_lock_init(&nsim_trap_data->trap_lock);
643 nsim_trap_data->nsim_dev = nsim_dev;
644 nsim_dev->trap_data = nsim_trap_data;
646 err = devlink_trap_policers_register(devlink, nsim_trap_policers_arr,
649 goto err_trap_policers_cnt_free;
651 err = devlink_trap_groups_register(devlink, nsim_trap_groups_arr,
652 ARRAY_SIZE(nsim_trap_groups_arr));
654 goto err_trap_policers_unregister;
656 err = devlink_traps_register(devlink, nsim_traps_arr,
657 ARRAY_SIZE(nsim_traps_arr), NULL);
659 goto err_trap_groups_unregister;
661 INIT_DELAYED_WORK(&nsim_dev->trap_data->trap_report_dw,
662 nsim_dev_trap_report_work);
663 schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw,
664 msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS));
668 err_trap_groups_unregister:
669 devlink_trap_groups_unregister(devlink, nsim_trap_groups_arr,
670 ARRAY_SIZE(nsim_trap_groups_arr));
671 err_trap_policers_unregister:
672 devlink_trap_policers_unregister(devlink, nsim_trap_policers_arr,
673 ARRAY_SIZE(nsim_trap_policers_arr));
674 err_trap_policers_cnt_free:
675 kfree(nsim_trap_data->trap_policers_cnt_arr);
677 kfree(nsim_trap_data->trap_items_arr);
679 kfree(nsim_trap_data);
683 static void nsim_dev_traps_exit(struct devlink *devlink)
685 struct nsim_dev *nsim_dev = devlink_priv(devlink);
687 cancel_delayed_work_sync(&nsim_dev->trap_data->trap_report_dw);
688 devlink_traps_unregister(devlink, nsim_traps_arr,
689 ARRAY_SIZE(nsim_traps_arr));
690 devlink_trap_groups_unregister(devlink, nsim_trap_groups_arr,
691 ARRAY_SIZE(nsim_trap_groups_arr));
692 devlink_trap_policers_unregister(devlink, nsim_trap_policers_arr,
693 ARRAY_SIZE(nsim_trap_policers_arr));
694 kfree(nsim_dev->trap_data->trap_policers_cnt_arr);
695 kfree(nsim_dev->trap_data->trap_items_arr);
696 kfree(nsim_dev->trap_data);
699 static int nsim_dev_reload_create(struct nsim_dev *nsim_dev,
700 struct netlink_ext_ack *extack);
701 static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev);
703 static int nsim_dev_reload_down(struct devlink *devlink, bool netns_change,
704 enum devlink_reload_action action, enum devlink_reload_limit limit,
705 struct netlink_ext_ack *extack)
707 struct nsim_dev *nsim_dev = devlink_priv(devlink);
709 if (nsim_dev->dont_allow_reload) {
710 /* For testing purposes, user set debugfs dont_allow_reload
711 * value to true. So forbid it.
713 NL_SET_ERR_MSG_MOD(extack, "User forbid the reload for testing purposes");
717 nsim_dev_reload_destroy(nsim_dev);
721 static int nsim_dev_reload_up(struct devlink *devlink, enum devlink_reload_action action,
722 enum devlink_reload_limit limit, u32 *actions_performed,
723 struct netlink_ext_ack *extack)
725 struct nsim_dev *nsim_dev = devlink_priv(devlink);
727 if (nsim_dev->fail_reload) {
728 /* For testing purposes, user set debugfs fail_reload
729 * value to true. Fail right away.
731 NL_SET_ERR_MSG_MOD(extack, "User setup the reload to fail for testing purposes");
735 *actions_performed = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT);
736 return nsim_dev_reload_create(nsim_dev, extack);
739 static int nsim_dev_info_get(struct devlink *devlink,
740 struct devlink_info_req *req,
741 struct netlink_ext_ack *extack)
743 return devlink_info_driver_name_put(req, DRV_NAME);
746 #define NSIM_DEV_FLASH_SIZE 500000
747 #define NSIM_DEV_FLASH_CHUNK_SIZE 1000
748 #define NSIM_DEV_FLASH_CHUNK_TIME_MS 10
750 static int nsim_dev_flash_update(struct devlink *devlink,
751 struct devlink_flash_update_params *params,
752 struct netlink_ext_ack *extack)
754 struct nsim_dev *nsim_dev = devlink_priv(devlink);
757 if ((params->overwrite_mask & ~nsim_dev->fw_update_overwrite_mask) != 0)
760 if (nsim_dev->fw_update_status) {
761 devlink_flash_update_begin_notify(devlink);
762 devlink_flash_update_status_notify(devlink,
763 "Preparing to flash",
764 params->component, 0, 0);
767 for (i = 0; i < NSIM_DEV_FLASH_SIZE / NSIM_DEV_FLASH_CHUNK_SIZE; i++) {
768 if (nsim_dev->fw_update_status)
769 devlink_flash_update_status_notify(devlink, "Flashing",
771 i * NSIM_DEV_FLASH_CHUNK_SIZE,
772 NSIM_DEV_FLASH_SIZE);
773 msleep(NSIM_DEV_FLASH_CHUNK_TIME_MS);
776 if (nsim_dev->fw_update_status) {
777 devlink_flash_update_status_notify(devlink, "Flashing",
780 NSIM_DEV_FLASH_SIZE);
781 devlink_flash_update_timeout_notify(devlink, "Flash select",
782 params->component, 81);
783 devlink_flash_update_status_notify(devlink, "Flashing done",
784 params->component, 0, 0);
785 devlink_flash_update_end_notify(devlink);
791 static struct nsim_trap_item *
792 nsim_dev_trap_item_lookup(struct nsim_dev *nsim_dev, u16 trap_id)
794 struct nsim_trap_data *nsim_trap_data = nsim_dev->trap_data;
797 for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) {
798 if (nsim_traps_arr[i].id == trap_id)
799 return &nsim_trap_data->trap_items_arr[i];
805 static int nsim_dev_devlink_trap_init(struct devlink *devlink,
806 const struct devlink_trap *trap,
809 struct nsim_dev *nsim_dev = devlink_priv(devlink);
810 struct nsim_trap_item *nsim_trap_item;
812 nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id);
813 if (WARN_ON(!nsim_trap_item))
816 nsim_trap_item->trap_ctx = trap_ctx;
817 nsim_trap_item->action = trap->init_action;
823 nsim_dev_devlink_trap_action_set(struct devlink *devlink,
824 const struct devlink_trap *trap,
825 enum devlink_trap_action action,
826 struct netlink_ext_ack *extack)
828 struct nsim_dev *nsim_dev = devlink_priv(devlink);
829 struct nsim_trap_item *nsim_trap_item;
831 nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id);
832 if (WARN_ON(!nsim_trap_item))
835 spin_lock(&nsim_dev->trap_data->trap_lock);
836 nsim_trap_item->action = action;
837 spin_unlock(&nsim_dev->trap_data->trap_lock);
843 nsim_dev_devlink_trap_group_set(struct devlink *devlink,
844 const struct devlink_trap_group *group,
845 const struct devlink_trap_policer *policer,
846 struct netlink_ext_ack *extack)
848 struct nsim_dev *nsim_dev = devlink_priv(devlink);
850 if (nsim_dev->fail_trap_group_set)
857 nsim_dev_devlink_trap_policer_set(struct devlink *devlink,
858 const struct devlink_trap_policer *policer,
860 struct netlink_ext_ack *extack)
862 struct nsim_dev *nsim_dev = devlink_priv(devlink);
864 if (nsim_dev->fail_trap_policer_set) {
865 NL_SET_ERR_MSG_MOD(extack, "User setup the operation to fail for testing purposes");
873 nsim_dev_devlink_trap_policer_counter_get(struct devlink *devlink,
874 const struct devlink_trap_policer *policer,
877 struct nsim_dev *nsim_dev = devlink_priv(devlink);
880 if (nsim_dev->fail_trap_policer_counter_get)
883 cnt = &nsim_dev->trap_data->trap_policers_cnt_arr[policer->id - 1];
889 static const struct devlink_ops nsim_dev_devlink_ops = {
890 .supported_flash_update_params = DEVLINK_SUPPORT_FLASH_UPDATE_COMPONENT |
891 DEVLINK_SUPPORT_FLASH_UPDATE_OVERWRITE_MASK,
892 .reload_actions = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT),
893 .reload_down = nsim_dev_reload_down,
894 .reload_up = nsim_dev_reload_up,
895 .info_get = nsim_dev_info_get,
896 .flash_update = nsim_dev_flash_update,
897 .trap_init = nsim_dev_devlink_trap_init,
898 .trap_action_set = nsim_dev_devlink_trap_action_set,
899 .trap_group_set = nsim_dev_devlink_trap_group_set,
900 .trap_policer_set = nsim_dev_devlink_trap_policer_set,
901 .trap_policer_counter_get = nsim_dev_devlink_trap_policer_counter_get,
904 #define NSIM_DEV_MAX_MACS_DEFAULT 32
905 #define NSIM_DEV_TEST1_DEFAULT true
907 static int __nsim_dev_port_add(struct nsim_dev *nsim_dev,
908 unsigned int port_index)
910 struct devlink_port_attrs attrs = {};
911 struct nsim_dev_port *nsim_dev_port;
912 struct devlink_port *devlink_port;
915 nsim_dev_port = kzalloc(sizeof(*nsim_dev_port), GFP_KERNEL);
918 nsim_dev_port->port_index = port_index;
920 devlink_port = &nsim_dev_port->devlink_port;
921 attrs.flavour = DEVLINK_PORT_FLAVOUR_PHYSICAL;
922 attrs.phys.port_number = port_index + 1;
923 memcpy(attrs.switch_id.id, nsim_dev->switch_id.id, nsim_dev->switch_id.id_len);
924 attrs.switch_id.id_len = nsim_dev->switch_id.id_len;
925 devlink_port_attrs_set(devlink_port, &attrs);
926 err = devlink_port_register(priv_to_devlink(nsim_dev), devlink_port,
931 err = nsim_dev_port_debugfs_init(nsim_dev, nsim_dev_port);
933 goto err_dl_port_unregister;
935 nsim_dev_port->ns = nsim_create(nsim_dev, nsim_dev_port);
936 if (IS_ERR(nsim_dev_port->ns)) {
937 err = PTR_ERR(nsim_dev_port->ns);
938 goto err_port_debugfs_exit;
941 devlink_port_type_eth_set(devlink_port, nsim_dev_port->ns->netdev);
942 list_add(&nsim_dev_port->list, &nsim_dev->port_list);
946 err_port_debugfs_exit:
947 nsim_dev_port_debugfs_exit(nsim_dev_port);
948 err_dl_port_unregister:
949 devlink_port_unregister(devlink_port);
951 kfree(nsim_dev_port);
955 static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port)
957 struct devlink_port *devlink_port = &nsim_dev_port->devlink_port;
959 list_del(&nsim_dev_port->list);
960 devlink_port_type_clear(devlink_port);
961 nsim_destroy(nsim_dev_port->ns);
962 nsim_dev_port_debugfs_exit(nsim_dev_port);
963 devlink_port_unregister(devlink_port);
964 kfree(nsim_dev_port);
967 static void nsim_dev_port_del_all(struct nsim_dev *nsim_dev)
969 struct nsim_dev_port *nsim_dev_port, *tmp;
971 mutex_lock(&nsim_dev->port_list_lock);
972 list_for_each_entry_safe(nsim_dev_port, tmp,
973 &nsim_dev->port_list, list)
974 __nsim_dev_port_del(nsim_dev_port);
975 mutex_unlock(&nsim_dev->port_list_lock);
978 static int nsim_dev_port_add_all(struct nsim_dev *nsim_dev,
979 unsigned int port_count)
983 for (i = 0; i < port_count; i++) {
984 err = __nsim_dev_port_add(nsim_dev, i);
986 goto err_port_del_all;
991 nsim_dev_port_del_all(nsim_dev);
995 static int nsim_dev_reload_create(struct nsim_dev *nsim_dev,
996 struct netlink_ext_ack *extack)
998 struct nsim_bus_dev *nsim_bus_dev = nsim_dev->nsim_bus_dev;
999 struct devlink *devlink;
1002 devlink = priv_to_devlink(nsim_dev);
1003 nsim_dev = devlink_priv(devlink);
1004 INIT_LIST_HEAD(&nsim_dev->port_list);
1005 mutex_init(&nsim_dev->port_list_lock);
1006 nsim_dev->fw_update_status = true;
1007 nsim_dev->fw_update_overwrite_mask = 0;
1009 nsim_dev->fib_data = nsim_fib_create(devlink, extack);
1010 if (IS_ERR(nsim_dev->fib_data))
1011 return PTR_ERR(nsim_dev->fib_data);
1013 nsim_devlink_param_load_driverinit_values(devlink);
1015 err = nsim_dev_dummy_region_init(nsim_dev, devlink);
1017 goto err_fib_destroy;
1019 err = nsim_dev_traps_init(devlink);
1021 goto err_dummy_region_exit;
1023 err = nsim_dev_health_init(nsim_dev, devlink);
1025 goto err_traps_exit;
1027 err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count);
1029 goto err_health_exit;
1031 nsim_dev->take_snapshot = debugfs_create_file("take_snapshot",
1035 &nsim_dev_take_snapshot_fops);
1039 nsim_dev_health_exit(nsim_dev);
1041 nsim_dev_traps_exit(devlink);
1042 err_dummy_region_exit:
1043 nsim_dev_dummy_region_exit(nsim_dev);
1045 nsim_fib_destroy(devlink, nsim_dev->fib_data);
1049 int nsim_dev_probe(struct nsim_bus_dev *nsim_bus_dev)
1051 struct nsim_dev *nsim_dev;
1052 struct devlink *devlink;
1055 devlink = devlink_alloc(&nsim_dev_devlink_ops, sizeof(*nsim_dev));
1058 devlink_net_set(devlink, nsim_bus_dev->initial_net);
1059 nsim_dev = devlink_priv(devlink);
1060 nsim_dev->nsim_bus_dev = nsim_bus_dev;
1061 nsim_dev->switch_id.id_len = sizeof(nsim_dev->switch_id.id);
1062 get_random_bytes(nsim_dev->switch_id.id, nsim_dev->switch_id.id_len);
1063 INIT_LIST_HEAD(&nsim_dev->port_list);
1064 mutex_init(&nsim_dev->port_list_lock);
1065 nsim_dev->fw_update_status = true;
1066 nsim_dev->fw_update_overwrite_mask = 0;
1067 nsim_dev->max_macs = NSIM_DEV_MAX_MACS_DEFAULT;
1068 nsim_dev->test1 = NSIM_DEV_TEST1_DEFAULT;
1069 spin_lock_init(&nsim_dev->fa_cookie_lock);
1071 dev_set_drvdata(&nsim_bus_dev->dev, nsim_dev);
1073 err = nsim_dev_resources_register(devlink);
1075 goto err_devlink_free;
1077 nsim_dev->fib_data = nsim_fib_create(devlink, NULL);
1078 if (IS_ERR(nsim_dev->fib_data)) {
1079 err = PTR_ERR(nsim_dev->fib_data);
1080 goto err_resources_unregister;
1083 err = devlink_register(devlink, &nsim_bus_dev->dev);
1085 goto err_fib_destroy;
1087 err = devlink_params_register(devlink, nsim_devlink_params,
1088 ARRAY_SIZE(nsim_devlink_params));
1090 goto err_dl_unregister;
1091 nsim_devlink_set_params_init_values(nsim_dev, devlink);
1093 err = nsim_dev_dummy_region_init(nsim_dev, devlink);
1095 goto err_params_unregister;
1097 err = nsim_dev_traps_init(devlink);
1099 goto err_dummy_region_exit;
1101 err = nsim_dev_debugfs_init(nsim_dev);
1103 goto err_traps_exit;
1105 err = nsim_dev_health_init(nsim_dev, devlink);
1107 goto err_debugfs_exit;
1109 err = nsim_bpf_dev_init(nsim_dev);
1111 goto err_health_exit;
1113 err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count);
1115 goto err_bpf_dev_exit;
1117 devlink_params_publish(devlink);
1118 devlink_reload_enable(devlink);
1122 nsim_bpf_dev_exit(nsim_dev);
1124 nsim_dev_health_exit(nsim_dev);
1126 nsim_dev_debugfs_exit(nsim_dev);
1128 nsim_dev_traps_exit(devlink);
1129 err_dummy_region_exit:
1130 nsim_dev_dummy_region_exit(nsim_dev);
1131 err_params_unregister:
1132 devlink_params_unregister(devlink, nsim_devlink_params,
1133 ARRAY_SIZE(nsim_devlink_params));
1135 devlink_unregister(devlink);
1137 nsim_fib_destroy(devlink, nsim_dev->fib_data);
1138 err_resources_unregister:
1139 devlink_resources_unregister(devlink, NULL);
1141 devlink_free(devlink);
1145 static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev)
1147 struct devlink *devlink = priv_to_devlink(nsim_dev);
1149 if (devlink_is_reload_failed(devlink))
1151 debugfs_remove(nsim_dev->take_snapshot);
1152 nsim_dev_port_del_all(nsim_dev);
1153 nsim_dev_health_exit(nsim_dev);
1154 nsim_dev_traps_exit(devlink);
1155 nsim_dev_dummy_region_exit(nsim_dev);
1156 mutex_destroy(&nsim_dev->port_list_lock);
1157 nsim_fib_destroy(devlink, nsim_dev->fib_data);
1160 void nsim_dev_remove(struct nsim_bus_dev *nsim_bus_dev)
1162 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
1163 struct devlink *devlink = priv_to_devlink(nsim_dev);
1165 devlink_reload_disable(devlink);
1167 nsim_dev_reload_destroy(nsim_dev);
1169 nsim_bpf_dev_exit(nsim_dev);
1170 nsim_dev_debugfs_exit(nsim_dev);
1171 devlink_params_unregister(devlink, nsim_devlink_params,
1172 ARRAY_SIZE(nsim_devlink_params));
1173 devlink_unregister(devlink);
1174 devlink_resources_unregister(devlink, NULL);
1175 devlink_free(devlink);
1178 static struct nsim_dev_port *
1179 __nsim_dev_port_lookup(struct nsim_dev *nsim_dev, unsigned int port_index)
1181 struct nsim_dev_port *nsim_dev_port;
1183 list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list)
1184 if (nsim_dev_port->port_index == port_index)
1185 return nsim_dev_port;
1189 int nsim_dev_port_add(struct nsim_bus_dev *nsim_bus_dev,
1190 unsigned int port_index)
1192 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
1195 mutex_lock(&nsim_dev->port_list_lock);
1196 if (__nsim_dev_port_lookup(nsim_dev, port_index))
1199 err = __nsim_dev_port_add(nsim_dev, port_index);
1200 mutex_unlock(&nsim_dev->port_list_lock);
1204 int nsim_dev_port_del(struct nsim_bus_dev *nsim_bus_dev,
1205 unsigned int port_index)
1207 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
1208 struct nsim_dev_port *nsim_dev_port;
1211 mutex_lock(&nsim_dev->port_list_lock);
1212 nsim_dev_port = __nsim_dev_port_lookup(nsim_dev, port_index);
1216 __nsim_dev_port_del(nsim_dev_port);
1217 mutex_unlock(&nsim_dev->port_list_lock);
1221 int nsim_dev_init(void)
1223 nsim_dev_ddir = debugfs_create_dir(DRV_NAME, NULL);
1224 return PTR_ERR_OR_ZERO(nsim_dev_ddir);
1227 void nsim_dev_exit(void)
1229 debugfs_remove_recursive(nsim_dev_ddir);