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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>
30#include <net/ip.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>
35
36#include "netdevsim.h"
37
38static struct dentry *nsim_dev_ddir;
39
40#define NSIM_DEV_DUMMY_REGION_SIZE (1024 * 32)
41
42static int
43nsim_dev_take_snapshot(struct devlink *devlink,
44 const struct devlink_region_ops *ops,
45 struct netlink_ext_ack *extack,
46 u8 **data)
47{
48 void *dummy_data;
49
50 dummy_data = kmalloc(NSIM_DEV_DUMMY_REGION_SIZE, GFP_KERNEL);
51 if (!dummy_data)
52 return -ENOMEM;
53
54 get_random_bytes(dummy_data, NSIM_DEV_DUMMY_REGION_SIZE);
55
56 *data = dummy_data;
57
58 return 0;
59}
60
61static ssize_t nsim_dev_take_snapshot_write(struct file *file,
62 const char __user *data,
63 size_t count, loff_t *ppos)
64{
65 struct nsim_dev *nsim_dev = file->private_data;
66 struct devlink *devlink;
67 u8 *dummy_data;
68 int err;
69 u32 id;
70
71 devlink = priv_to_devlink(nsim_dev);
72
73 err = nsim_dev_take_snapshot(devlink, NULL, NULL, &dummy_data);
74 if (err)
75 return err;
76
77 err = devlink_region_snapshot_id_get(devlink, &id);
78 if (err) {
79 pr_err("Failed to get snapshot id\n");
80 kfree(dummy_data);
81 return err;
82 }
83 err = devlink_region_snapshot_create(nsim_dev->dummy_region,
84 dummy_data, id);
85 devlink_region_snapshot_id_put(devlink, id);
86 if (err) {
87 pr_err("Failed to create region snapshot\n");
88 kfree(dummy_data);
89 return err;
90 }
91
92 return count;
93}
94
95static const struct file_operations nsim_dev_take_snapshot_fops = {
96 .open = simple_open,
97 .write = nsim_dev_take_snapshot_write,
98 .llseek = generic_file_llseek,
99 .owner = THIS_MODULE,
100};
101
102static ssize_t nsim_dev_trap_fa_cookie_read(struct file *file,
103 char __user *data,
104 size_t count, loff_t *ppos)
105{
106 struct nsim_dev *nsim_dev = file->private_data;
107 struct flow_action_cookie *fa_cookie;
108 unsigned int buf_len;
109 ssize_t ret;
110 char *buf;
111
112 spin_lock(&nsim_dev->fa_cookie_lock);
113 fa_cookie = nsim_dev->fa_cookie;
114 if (!fa_cookie) {
115 ret = -EINVAL;
116 goto errout;
117 }
118 buf_len = fa_cookie->cookie_len * 2;
119 buf = kmalloc(buf_len, GFP_ATOMIC);
120 if (!buf) {
121 ret = -ENOMEM;
122 goto errout;
123 }
124 bin2hex(buf, fa_cookie->cookie, fa_cookie->cookie_len);
125 spin_unlock(&nsim_dev->fa_cookie_lock);
126
127 ret = simple_read_from_buffer(data, count, ppos, buf, buf_len);
128
129 kfree(buf);
130 return ret;
131
132errout:
133 spin_unlock(&nsim_dev->fa_cookie_lock);
134 return ret;
135}
136
137static ssize_t nsim_dev_trap_fa_cookie_write(struct file *file,
138 const char __user *data,
139 size_t count, loff_t *ppos)
140{
141 struct nsim_dev *nsim_dev = file->private_data;
142 struct flow_action_cookie *fa_cookie;
143 size_t cookie_len;
144 ssize_t ret;
145 char *buf;
146
147 if (*ppos != 0)
148 return -EINVAL;
149 cookie_len = (count - 1) / 2;
150 if ((count - 1) % 2)
151 return -EINVAL;
152 buf = kmalloc(count, GFP_KERNEL | __GFP_NOWARN);
153 if (!buf)
154 return -ENOMEM;
155
156 ret = simple_write_to_buffer(buf, count, ppos, data, count);
157 if (ret < 0)
158 goto free_buf;
159
160 fa_cookie = kmalloc(sizeof(*fa_cookie) + cookie_len,
161 GFP_KERNEL | __GFP_NOWARN);
162 if (!fa_cookie) {
163 ret = -ENOMEM;
164 goto free_buf;
165 }
166
167 fa_cookie->cookie_len = cookie_len;
168 ret = hex2bin(fa_cookie->cookie, buf, cookie_len);
169 if (ret)
170 goto free_fa_cookie;
171 kfree(buf);
172
173 spin_lock(&nsim_dev->fa_cookie_lock);
174 kfree(nsim_dev->fa_cookie);
175 nsim_dev->fa_cookie = fa_cookie;
176 spin_unlock(&nsim_dev->fa_cookie_lock);
177
178 return count;
179
180free_fa_cookie:
181 kfree(fa_cookie);
182free_buf:
183 kfree(buf);
184 return ret;
185}
186
187static const struct file_operations nsim_dev_trap_fa_cookie_fops = {
188 .open = simple_open,
189 .read = nsim_dev_trap_fa_cookie_read,
190 .write = nsim_dev_trap_fa_cookie_write,
191 .llseek = generic_file_llseek,
192 .owner = THIS_MODULE,
193};
194
195static int nsim_dev_debugfs_init(struct nsim_dev *nsim_dev)
196{
197 char dev_ddir_name[sizeof(DRV_NAME) + 10];
198
199 sprintf(dev_ddir_name, DRV_NAME "%u", nsim_dev->nsim_bus_dev->dev.id);
200 nsim_dev->ddir = debugfs_create_dir(dev_ddir_name, nsim_dev_ddir);
201 if (IS_ERR(nsim_dev->ddir))
202 return PTR_ERR(nsim_dev->ddir);
203 nsim_dev->ports_ddir = debugfs_create_dir("ports", nsim_dev->ddir);
204 if (IS_ERR(nsim_dev->ports_ddir))
205 return PTR_ERR(nsim_dev->ports_ddir);
206 debugfs_create_bool("fw_update_status", 0600, nsim_dev->ddir,
207 &nsim_dev->fw_update_status);
208 debugfs_create_u32("fw_update_overwrite_mask", 0600, nsim_dev->ddir,
209 &nsim_dev->fw_update_overwrite_mask);
210 debugfs_create_u32("max_macs", 0600, nsim_dev->ddir,
211 &nsim_dev->max_macs);
212 debugfs_create_bool("test1", 0600, nsim_dev->ddir,
213 &nsim_dev->test1);
214 nsim_dev->take_snapshot = debugfs_create_file("take_snapshot",
215 0200,
216 nsim_dev->ddir,
217 nsim_dev,
218 &nsim_dev_take_snapshot_fops);
219 debugfs_create_bool("dont_allow_reload", 0600, nsim_dev->ddir,
220 &nsim_dev->dont_allow_reload);
221 debugfs_create_bool("fail_reload", 0600, nsim_dev->ddir,
222 &nsim_dev->fail_reload);
223 debugfs_create_file("trap_flow_action_cookie", 0600, nsim_dev->ddir,
224 nsim_dev, &nsim_dev_trap_fa_cookie_fops);
225 debugfs_create_bool("fail_trap_group_set", 0600,
226 nsim_dev->ddir,
227 &nsim_dev->fail_trap_group_set);
228 debugfs_create_bool("fail_trap_policer_set", 0600,
229 nsim_dev->ddir,
230 &nsim_dev->fail_trap_policer_set);
231 debugfs_create_bool("fail_trap_policer_counter_get", 0600,
232 nsim_dev->ddir,
233 &nsim_dev->fail_trap_policer_counter_get);
234 nsim_udp_tunnels_debugfs_create(nsim_dev);
235 return 0;
236}
237
238static void nsim_dev_debugfs_exit(struct nsim_dev *nsim_dev)
239{
240 debugfs_remove_recursive(nsim_dev->ports_ddir);
241 debugfs_remove_recursive(nsim_dev->ddir);
242}
243
244static int nsim_dev_port_debugfs_init(struct nsim_dev *nsim_dev,
245 struct nsim_dev_port *nsim_dev_port)
246{
247 char port_ddir_name[16];
248 char dev_link_name[32];
249
250 sprintf(port_ddir_name, "%u", nsim_dev_port->port_index);
251 nsim_dev_port->ddir = debugfs_create_dir(port_ddir_name,
252 nsim_dev->ports_ddir);
253 if (IS_ERR(nsim_dev_port->ddir))
254 return PTR_ERR(nsim_dev_port->ddir);
255
256 sprintf(dev_link_name, "../../../" DRV_NAME "%u",
257 nsim_dev->nsim_bus_dev->dev.id);
258 debugfs_create_symlink("dev", nsim_dev_port->ddir, dev_link_name);
259
260 return 0;
261}
262
263static void nsim_dev_port_debugfs_exit(struct nsim_dev_port *nsim_dev_port)
264{
265 debugfs_remove_recursive(nsim_dev_port->ddir);
266}
267
268static int nsim_dev_resources_register(struct devlink *devlink)
269{
270 struct devlink_resource_size_params params = {
271 .size_max = (u64)-1,
272 .size_granularity = 1,
273 .unit = DEVLINK_RESOURCE_UNIT_ENTRY
274 };
275 int err;
276
277
278 err = devlink_resource_register(devlink, "IPv4", (u64)-1,
279 NSIM_RESOURCE_IPV4,
280 DEVLINK_RESOURCE_ID_PARENT_TOP,
281 ¶ms);
282 if (err) {
283 pr_err("Failed to register IPv4 top resource\n");
284 goto out;
285 }
286
287 err = devlink_resource_register(devlink, "fib", (u64)-1,
288 NSIM_RESOURCE_IPV4_FIB,
289 NSIM_RESOURCE_IPV4, ¶ms);
290 if (err) {
291 pr_err("Failed to register IPv4 FIB resource\n");
292 return err;
293 }
294
295 err = devlink_resource_register(devlink, "fib-rules", (u64)-1,
296 NSIM_RESOURCE_IPV4_FIB_RULES,
297 NSIM_RESOURCE_IPV4, ¶ms);
298 if (err) {
299 pr_err("Failed to register IPv4 FIB rules resource\n");
300 return err;
301 }
302
303
304 err = devlink_resource_register(devlink, "IPv6", (u64)-1,
305 NSIM_RESOURCE_IPV6,
306 DEVLINK_RESOURCE_ID_PARENT_TOP,
307 ¶ms);
308 if (err) {
309 pr_err("Failed to register IPv6 top resource\n");
310 goto out;
311 }
312
313 err = devlink_resource_register(devlink, "fib", (u64)-1,
314 NSIM_RESOURCE_IPV6_FIB,
315 NSIM_RESOURCE_IPV6, ¶ms);
316 if (err) {
317 pr_err("Failed to register IPv6 FIB resource\n");
318 return err;
319 }
320
321 err = devlink_resource_register(devlink, "fib-rules", (u64)-1,
322 NSIM_RESOURCE_IPV6_FIB_RULES,
323 NSIM_RESOURCE_IPV6, ¶ms);
324 if (err) {
325 pr_err("Failed to register IPv6 FIB rules resource\n");
326 return err;
327 }
328
329
330 err = devlink_resource_register(devlink, "nexthops", (u64)-1,
331 NSIM_RESOURCE_NEXTHOPS,
332 DEVLINK_RESOURCE_ID_PARENT_TOP,
333 ¶ms);
334
335out:
336 return err;
337}
338
339enum nsim_devlink_param_id {
340 NSIM_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX,
341 NSIM_DEVLINK_PARAM_ID_TEST1,
342};
343
344static const struct devlink_param nsim_devlink_params[] = {
345 DEVLINK_PARAM_GENERIC(MAX_MACS,
346 BIT(DEVLINK_PARAM_CMODE_DRIVERINIT),
347 NULL, NULL, NULL),
348 DEVLINK_PARAM_DRIVER(NSIM_DEVLINK_PARAM_ID_TEST1,
349 "test1", DEVLINK_PARAM_TYPE_BOOL,
350 BIT(DEVLINK_PARAM_CMODE_DRIVERINIT),
351 NULL, NULL, NULL),
352};
353
354static void nsim_devlink_set_params_init_values(struct nsim_dev *nsim_dev,
355 struct devlink *devlink)
356{
357 union devlink_param_value value;
358
359 value.vu32 = nsim_dev->max_macs;
360 devlink_param_driverinit_value_set(devlink,
361 DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
362 value);
363 value.vbool = nsim_dev->test1;
364 devlink_param_driverinit_value_set(devlink,
365 NSIM_DEVLINK_PARAM_ID_TEST1,
366 value);
367}
368
369static void nsim_devlink_param_load_driverinit_values(struct devlink *devlink)
370{
371 struct nsim_dev *nsim_dev = devlink_priv(devlink);
372 union devlink_param_value saved_value;
373 int err;
374
375 err = devlink_param_driverinit_value_get(devlink,
376 DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
377 &saved_value);
378 if (!err)
379 nsim_dev->max_macs = saved_value.vu32;
380 err = devlink_param_driverinit_value_get(devlink,
381 NSIM_DEVLINK_PARAM_ID_TEST1,
382 &saved_value);
383 if (!err)
384 nsim_dev->test1 = saved_value.vbool;
385}
386
387#define NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX 16
388
389static const struct devlink_region_ops dummy_region_ops = {
390 .name = "dummy",
391 .destructor = &kfree,
392 .snapshot = nsim_dev_take_snapshot,
393};
394
395static int nsim_dev_dummy_region_init(struct nsim_dev *nsim_dev,
396 struct devlink *devlink)
397{
398 nsim_dev->dummy_region =
399 devlink_region_create(devlink, &dummy_region_ops,
400 NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX,
401 NSIM_DEV_DUMMY_REGION_SIZE);
402 return PTR_ERR_OR_ZERO(nsim_dev->dummy_region);
403}
404
405static void nsim_dev_dummy_region_exit(struct nsim_dev *nsim_dev)
406{
407 devlink_region_destroy(nsim_dev->dummy_region);
408}
409
410struct nsim_trap_item {
411 void *trap_ctx;
412 enum devlink_trap_action action;
413};
414
415struct nsim_trap_data {
416 struct delayed_work trap_report_dw;
417 struct nsim_trap_item *trap_items_arr;
418 u64 *trap_policers_cnt_arr;
419 struct nsim_dev *nsim_dev;
420 spinlock_t trap_lock;
421};
422
423
424
425
426enum {
427 NSIM_TRAP_ID_BASE = DEVLINK_TRAP_GENERIC_ID_MAX,
428 NSIM_TRAP_ID_FID_MISS,
429};
430
431#define NSIM_TRAP_NAME_FID_MISS "fid_miss"
432
433#define NSIM_TRAP_METADATA DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT
434
435#define NSIM_TRAP_DROP(_id, _group_id) \
436 DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \
437 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \
438 NSIM_TRAP_METADATA)
439#define NSIM_TRAP_DROP_EXT(_id, _group_id, _metadata) \
440 DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \
441 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \
442 NSIM_TRAP_METADATA | (_metadata))
443#define NSIM_TRAP_EXCEPTION(_id, _group_id) \
444 DEVLINK_TRAP_GENERIC(EXCEPTION, TRAP, _id, \
445 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \
446 NSIM_TRAP_METADATA)
447#define NSIM_TRAP_CONTROL(_id, _group_id, _action) \
448 DEVLINK_TRAP_GENERIC(CONTROL, _action, _id, \
449 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \
450 NSIM_TRAP_METADATA)
451#define NSIM_TRAP_DRIVER_EXCEPTION(_id, _group_id) \
452 DEVLINK_TRAP_DRIVER(EXCEPTION, TRAP, NSIM_TRAP_ID_##_id, \
453 NSIM_TRAP_NAME_##_id, \
454 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \
455 NSIM_TRAP_METADATA)
456
457#define NSIM_DEV_TRAP_POLICER_MIN_RATE 1
458#define NSIM_DEV_TRAP_POLICER_MAX_RATE 8000
459#define NSIM_DEV_TRAP_POLICER_MIN_BURST 8
460#define NSIM_DEV_TRAP_POLICER_MAX_BURST 65536
461
462#define NSIM_TRAP_POLICER(_id, _rate, _burst) \
463 DEVLINK_TRAP_POLICER(_id, _rate, _burst, \
464 NSIM_DEV_TRAP_POLICER_MAX_RATE, \
465 NSIM_DEV_TRAP_POLICER_MIN_RATE, \
466 NSIM_DEV_TRAP_POLICER_MAX_BURST, \
467 NSIM_DEV_TRAP_POLICER_MIN_BURST)
468
469static const struct devlink_trap_policer nsim_trap_policers_arr[] = {
470 NSIM_TRAP_POLICER(1, 1000, 128),
471 NSIM_TRAP_POLICER(2, 2000, 256),
472 NSIM_TRAP_POLICER(3, 3000, 512),
473};
474
475static const struct devlink_trap_group nsim_trap_groups_arr[] = {
476 DEVLINK_TRAP_GROUP_GENERIC(L2_DROPS, 0),
477 DEVLINK_TRAP_GROUP_GENERIC(L3_DROPS, 1),
478 DEVLINK_TRAP_GROUP_GENERIC(L3_EXCEPTIONS, 1),
479 DEVLINK_TRAP_GROUP_GENERIC(BUFFER_DROPS, 2),
480 DEVLINK_TRAP_GROUP_GENERIC(ACL_DROPS, 3),
481 DEVLINK_TRAP_GROUP_GENERIC(MC_SNOOPING, 3),
482};
483
484static const struct devlink_trap nsim_traps_arr[] = {
485 NSIM_TRAP_DROP(SMAC_MC, L2_DROPS),
486 NSIM_TRAP_DROP(VLAN_TAG_MISMATCH, L2_DROPS),
487 NSIM_TRAP_DROP(INGRESS_VLAN_FILTER, L2_DROPS),
488 NSIM_TRAP_DROP(INGRESS_STP_FILTER, L2_DROPS),
489 NSIM_TRAP_DROP(EMPTY_TX_LIST, L2_DROPS),
490 NSIM_TRAP_DROP(PORT_LOOPBACK_FILTER, L2_DROPS),
491 NSIM_TRAP_DRIVER_EXCEPTION(FID_MISS, L2_DROPS),
492 NSIM_TRAP_DROP(BLACKHOLE_ROUTE, L3_DROPS),
493 NSIM_TRAP_EXCEPTION(TTL_ERROR, L3_EXCEPTIONS),
494 NSIM_TRAP_DROP(TAIL_DROP, BUFFER_DROPS),
495 NSIM_TRAP_DROP_EXT(INGRESS_FLOW_ACTION_DROP, ACL_DROPS,
496 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE),
497 NSIM_TRAP_DROP_EXT(EGRESS_FLOW_ACTION_DROP, ACL_DROPS,
498 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE),
499 NSIM_TRAP_CONTROL(IGMP_QUERY, MC_SNOOPING, MIRROR),
500 NSIM_TRAP_CONTROL(IGMP_V1_REPORT, MC_SNOOPING, TRAP),
501};
502
503#define NSIM_TRAP_L4_DATA_LEN 100
504
505static struct sk_buff *nsim_dev_trap_skb_build(void)
506{
507 int tot_len, data_len = NSIM_TRAP_L4_DATA_LEN;
508 struct sk_buff *skb;
509 struct udphdr *udph;
510 struct ethhdr *eth;
511 struct iphdr *iph;
512
513 skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
514 if (!skb)
515 return NULL;
516 tot_len = sizeof(struct iphdr) + sizeof(struct udphdr) + data_len;
517
518 skb_reset_mac_header(skb);
519 eth = skb_put(skb, sizeof(struct ethhdr));
520 eth_random_addr(eth->h_dest);
521 eth_random_addr(eth->h_source);
522 eth->h_proto = htons(ETH_P_IP);
523 skb->protocol = htons(ETH_P_IP);
524
525 skb_set_network_header(skb, skb->len);
526 iph = skb_put(skb, sizeof(struct iphdr));
527 iph->protocol = IPPROTO_UDP;
528 iph->saddr = in_aton("192.0.2.1");
529 iph->daddr = in_aton("198.51.100.1");
530 iph->version = 0x4;
531 iph->frag_off = 0;
532 iph->ihl = 0x5;
533 iph->tot_len = htons(tot_len);
534 iph->ttl = 100;
535 iph->check = 0;
536 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
537
538 skb_set_transport_header(skb, skb->len);
539 udph = skb_put_zero(skb, sizeof(struct udphdr) + data_len);
540 get_random_bytes(&udph->source, sizeof(u16));
541 get_random_bytes(&udph->dest, sizeof(u16));
542 udph->len = htons(sizeof(struct udphdr) + data_len);
543
544 return skb;
545}
546
547static void nsim_dev_trap_report(struct nsim_dev_port *nsim_dev_port)
548{
549 struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev;
550 struct devlink *devlink = priv_to_devlink(nsim_dev);
551 struct nsim_trap_data *nsim_trap_data;
552 int i;
553
554 nsim_trap_data = nsim_dev->trap_data;
555
556 spin_lock(&nsim_trap_data->trap_lock);
557 for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) {
558 struct flow_action_cookie *fa_cookie = NULL;
559 struct nsim_trap_item *nsim_trap_item;
560 struct sk_buff *skb;
561 bool has_fa_cookie;
562
563 has_fa_cookie = nsim_traps_arr[i].metadata_cap &
564 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE;
565
566 nsim_trap_item = &nsim_trap_data->trap_items_arr[i];
567 if (nsim_trap_item->action == DEVLINK_TRAP_ACTION_DROP)
568 continue;
569
570 skb = nsim_dev_trap_skb_build();
571 if (!skb)
572 continue;
573 skb->dev = nsim_dev_port->ns->netdev;
574
575
576
577
578
579
580
581 spin_lock_bh(&nsim_dev->fa_cookie_lock);
582 fa_cookie = has_fa_cookie ? nsim_dev->fa_cookie : NULL;
583 devlink_trap_report(devlink, skb, nsim_trap_item->trap_ctx,
584 &nsim_dev_port->devlink_port, fa_cookie);
585 spin_unlock_bh(&nsim_dev->fa_cookie_lock);
586 consume_skb(skb);
587 }
588 spin_unlock(&nsim_trap_data->trap_lock);
589}
590
591#define NSIM_TRAP_REPORT_INTERVAL_MS 100
592
593static void nsim_dev_trap_report_work(struct work_struct *work)
594{
595 struct nsim_trap_data *nsim_trap_data;
596 struct nsim_dev_port *nsim_dev_port;
597 struct nsim_dev *nsim_dev;
598
599 nsim_trap_data = container_of(work, struct nsim_trap_data,
600 trap_report_dw.work);
601 nsim_dev = nsim_trap_data->nsim_dev;
602
603
604
605
606 mutex_lock(&nsim_dev->port_list_lock);
607 list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list) {
608 if (!netif_running(nsim_dev_port->ns->netdev))
609 continue;
610
611 nsim_dev_trap_report(nsim_dev_port);
612 }
613 mutex_unlock(&nsim_dev->port_list_lock);
614
615 schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw,
616 msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS));
617}
618
619static int nsim_dev_traps_init(struct devlink *devlink)
620{
621 size_t policers_count = ARRAY_SIZE(nsim_trap_policers_arr);
622 struct nsim_dev *nsim_dev = devlink_priv(devlink);
623 struct nsim_trap_data *nsim_trap_data;
624 int err;
625
626 nsim_trap_data = kzalloc(sizeof(*nsim_trap_data), GFP_KERNEL);
627 if (!nsim_trap_data)
628 return -ENOMEM;
629
630 nsim_trap_data->trap_items_arr = kcalloc(ARRAY_SIZE(nsim_traps_arr),
631 sizeof(struct nsim_trap_item),
632 GFP_KERNEL);
633 if (!nsim_trap_data->trap_items_arr) {
634 err = -ENOMEM;
635 goto err_trap_data_free;
636 }
637
638 nsim_trap_data->trap_policers_cnt_arr = kcalloc(policers_count,
639 sizeof(u64),
640 GFP_KERNEL);
641 if (!nsim_trap_data->trap_policers_cnt_arr) {
642 err = -ENOMEM;
643 goto err_trap_items_free;
644 }
645
646
647
648
649
650 spin_lock_init(&nsim_trap_data->trap_lock);
651 nsim_trap_data->nsim_dev = nsim_dev;
652 nsim_dev->trap_data = nsim_trap_data;
653
654 err = devlink_trap_policers_register(devlink, nsim_trap_policers_arr,
655 policers_count);
656 if (err)
657 goto err_trap_policers_cnt_free;
658
659 err = devlink_trap_groups_register(devlink, nsim_trap_groups_arr,
660 ARRAY_SIZE(nsim_trap_groups_arr));
661 if (err)
662 goto err_trap_policers_unregister;
663
664 err = devlink_traps_register(devlink, nsim_traps_arr,
665 ARRAY_SIZE(nsim_traps_arr), NULL);
666 if (err)
667 goto err_trap_groups_unregister;
668
669 INIT_DELAYED_WORK(&nsim_dev->trap_data->trap_report_dw,
670 nsim_dev_trap_report_work);
671 schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw,
672 msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS));
673
674 return 0;
675
676err_trap_groups_unregister:
677 devlink_trap_groups_unregister(devlink, nsim_trap_groups_arr,
678 ARRAY_SIZE(nsim_trap_groups_arr));
679err_trap_policers_unregister:
680 devlink_trap_policers_unregister(devlink, nsim_trap_policers_arr,
681 ARRAY_SIZE(nsim_trap_policers_arr));
682err_trap_policers_cnt_free:
683 kfree(nsim_trap_data->trap_policers_cnt_arr);
684err_trap_items_free:
685 kfree(nsim_trap_data->trap_items_arr);
686err_trap_data_free:
687 kfree(nsim_trap_data);
688 return err;
689}
690
691static void nsim_dev_traps_exit(struct devlink *devlink)
692{
693 struct nsim_dev *nsim_dev = devlink_priv(devlink);
694
695 cancel_delayed_work_sync(&nsim_dev->trap_data->trap_report_dw);
696 devlink_traps_unregister(devlink, nsim_traps_arr,
697 ARRAY_SIZE(nsim_traps_arr));
698 devlink_trap_groups_unregister(devlink, nsim_trap_groups_arr,
699 ARRAY_SIZE(nsim_trap_groups_arr));
700 devlink_trap_policers_unregister(devlink, nsim_trap_policers_arr,
701 ARRAY_SIZE(nsim_trap_policers_arr));
702 kfree(nsim_dev->trap_data->trap_policers_cnt_arr);
703 kfree(nsim_dev->trap_data->trap_items_arr);
704 kfree(nsim_dev->trap_data);
705}
706
707static int nsim_dev_reload_create(struct nsim_dev *nsim_dev,
708 struct netlink_ext_ack *extack);
709static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev);
710
711static int nsim_dev_reload_down(struct devlink *devlink, bool netns_change,
712 enum devlink_reload_action action, enum devlink_reload_limit limit,
713 struct netlink_ext_ack *extack)
714{
715 struct nsim_dev *nsim_dev = devlink_priv(devlink);
716
717 if (nsim_dev->dont_allow_reload) {
718
719
720
721 NL_SET_ERR_MSG_MOD(extack, "User forbid the reload for testing purposes");
722 return -EOPNOTSUPP;
723 }
724
725 nsim_dev_reload_destroy(nsim_dev);
726 return 0;
727}
728
729static int nsim_dev_reload_up(struct devlink *devlink, enum devlink_reload_action action,
730 enum devlink_reload_limit limit, u32 *actions_performed,
731 struct netlink_ext_ack *extack)
732{
733 struct nsim_dev *nsim_dev = devlink_priv(devlink);
734
735 if (nsim_dev->fail_reload) {
736
737
738
739 NL_SET_ERR_MSG_MOD(extack, "User setup the reload to fail for testing purposes");
740 return -EINVAL;
741 }
742
743 *actions_performed = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT);
744 return nsim_dev_reload_create(nsim_dev, extack);
745}
746
747static int nsim_dev_info_get(struct devlink *devlink,
748 struct devlink_info_req *req,
749 struct netlink_ext_ack *extack)
750{
751 return devlink_info_driver_name_put(req, DRV_NAME);
752}
753
754#define NSIM_DEV_FLASH_SIZE 500000
755#define NSIM_DEV_FLASH_CHUNK_SIZE 1000
756#define NSIM_DEV_FLASH_CHUNK_TIME_MS 10
757
758static int nsim_dev_flash_update(struct devlink *devlink,
759 struct devlink_flash_update_params *params,
760 struct netlink_ext_ack *extack)
761{
762 struct nsim_dev *nsim_dev = devlink_priv(devlink);
763 int i;
764
765 if ((params->overwrite_mask & ~nsim_dev->fw_update_overwrite_mask) != 0)
766 return -EOPNOTSUPP;
767
768 if (nsim_dev->fw_update_status) {
769 devlink_flash_update_status_notify(devlink,
770 "Preparing to flash",
771 params->component, 0, 0);
772 }
773
774 for (i = 0; i < NSIM_DEV_FLASH_SIZE / NSIM_DEV_FLASH_CHUNK_SIZE; i++) {
775 if (nsim_dev->fw_update_status)
776 devlink_flash_update_status_notify(devlink, "Flashing",
777 params->component,
778 i * NSIM_DEV_FLASH_CHUNK_SIZE,
779 NSIM_DEV_FLASH_SIZE);
780 msleep(NSIM_DEV_FLASH_CHUNK_TIME_MS);
781 }
782
783 if (nsim_dev->fw_update_status) {
784 devlink_flash_update_status_notify(devlink, "Flashing",
785 params->component,
786 NSIM_DEV_FLASH_SIZE,
787 NSIM_DEV_FLASH_SIZE);
788 devlink_flash_update_timeout_notify(devlink, "Flash select",
789 params->component, 81);
790 devlink_flash_update_status_notify(devlink, "Flashing done",
791 params->component, 0, 0);
792 }
793
794 return 0;
795}
796
797static struct nsim_trap_item *
798nsim_dev_trap_item_lookup(struct nsim_dev *nsim_dev, u16 trap_id)
799{
800 struct nsim_trap_data *nsim_trap_data = nsim_dev->trap_data;
801 int i;
802
803 for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) {
804 if (nsim_traps_arr[i].id == trap_id)
805 return &nsim_trap_data->trap_items_arr[i];
806 }
807
808 return NULL;
809}
810
811static int nsim_dev_devlink_trap_init(struct devlink *devlink,
812 const struct devlink_trap *trap,
813 void *trap_ctx)
814{
815 struct nsim_dev *nsim_dev = devlink_priv(devlink);
816 struct nsim_trap_item *nsim_trap_item;
817
818 nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id);
819 if (WARN_ON(!nsim_trap_item))
820 return -ENOENT;
821
822 nsim_trap_item->trap_ctx = trap_ctx;
823 nsim_trap_item->action = trap->init_action;
824
825 return 0;
826}
827
828static int
829nsim_dev_devlink_trap_action_set(struct devlink *devlink,
830 const struct devlink_trap *trap,
831 enum devlink_trap_action action,
832 struct netlink_ext_ack *extack)
833{
834 struct nsim_dev *nsim_dev = devlink_priv(devlink);
835 struct nsim_trap_item *nsim_trap_item;
836
837 nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id);
838 if (WARN_ON(!nsim_trap_item))
839 return -ENOENT;
840
841 spin_lock(&nsim_dev->trap_data->trap_lock);
842 nsim_trap_item->action = action;
843 spin_unlock(&nsim_dev->trap_data->trap_lock);
844
845 return 0;
846}
847
848static int
849nsim_dev_devlink_trap_group_set(struct devlink *devlink,
850 const struct devlink_trap_group *group,
851 const struct devlink_trap_policer *policer,
852 struct netlink_ext_ack *extack)
853{
854 struct nsim_dev *nsim_dev = devlink_priv(devlink);
855
856 if (nsim_dev->fail_trap_group_set)
857 return -EINVAL;
858
859 return 0;
860}
861
862static int
863nsim_dev_devlink_trap_policer_set(struct devlink *devlink,
864 const struct devlink_trap_policer *policer,
865 u64 rate, u64 burst,
866 struct netlink_ext_ack *extack)
867{
868 struct nsim_dev *nsim_dev = devlink_priv(devlink);
869
870 if (nsim_dev->fail_trap_policer_set) {
871 NL_SET_ERR_MSG_MOD(extack, "User setup the operation to fail for testing purposes");
872 return -EINVAL;
873 }
874
875 return 0;
876}
877
878static int
879nsim_dev_devlink_trap_policer_counter_get(struct devlink *devlink,
880 const struct devlink_trap_policer *policer,
881 u64 *p_drops)
882{
883 struct nsim_dev *nsim_dev = devlink_priv(devlink);
884 u64 *cnt;
885
886 if (nsim_dev->fail_trap_policer_counter_get)
887 return -EINVAL;
888
889 cnt = &nsim_dev->trap_data->trap_policers_cnt_arr[policer->id - 1];
890 *p_drops = (*cnt)++;
891
892 return 0;
893}
894
895static const struct devlink_ops nsim_dev_devlink_ops = {
896 .supported_flash_update_params = DEVLINK_SUPPORT_FLASH_UPDATE_COMPONENT |
897 DEVLINK_SUPPORT_FLASH_UPDATE_OVERWRITE_MASK,
898 .reload_actions = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT),
899 .reload_down = nsim_dev_reload_down,
900 .reload_up = nsim_dev_reload_up,
901 .info_get = nsim_dev_info_get,
902 .flash_update = nsim_dev_flash_update,
903 .trap_init = nsim_dev_devlink_trap_init,
904 .trap_action_set = nsim_dev_devlink_trap_action_set,
905 .trap_group_set = nsim_dev_devlink_trap_group_set,
906 .trap_policer_set = nsim_dev_devlink_trap_policer_set,
907 .trap_policer_counter_get = nsim_dev_devlink_trap_policer_counter_get,
908};
909
910#define NSIM_DEV_MAX_MACS_DEFAULT 32
911#define NSIM_DEV_TEST1_DEFAULT true
912
913static int __nsim_dev_port_add(struct nsim_dev *nsim_dev,
914 unsigned int port_index)
915{
916 struct devlink_port_attrs attrs = {};
917 struct nsim_dev_port *nsim_dev_port;
918 struct devlink_port *devlink_port;
919 int err;
920
921 nsim_dev_port = kzalloc(sizeof(*nsim_dev_port), GFP_KERNEL);
922 if (!nsim_dev_port)
923 return -ENOMEM;
924 nsim_dev_port->port_index = port_index;
925
926 devlink_port = &nsim_dev_port->devlink_port;
927 attrs.flavour = DEVLINK_PORT_FLAVOUR_PHYSICAL;
928 attrs.phys.port_number = port_index + 1;
929 memcpy(attrs.switch_id.id, nsim_dev->switch_id.id, nsim_dev->switch_id.id_len);
930 attrs.switch_id.id_len = nsim_dev->switch_id.id_len;
931 devlink_port_attrs_set(devlink_port, &attrs);
932 err = devlink_port_register(priv_to_devlink(nsim_dev), devlink_port,
933 port_index);
934 if (err)
935 goto err_port_free;
936
937 err = nsim_dev_port_debugfs_init(nsim_dev, nsim_dev_port);
938 if (err)
939 goto err_dl_port_unregister;
940
941 nsim_dev_port->ns = nsim_create(nsim_dev, nsim_dev_port);
942 if (IS_ERR(nsim_dev_port->ns)) {
943 err = PTR_ERR(nsim_dev_port->ns);
944 goto err_port_debugfs_exit;
945 }
946
947 devlink_port_type_eth_set(devlink_port, nsim_dev_port->ns->netdev);
948 list_add(&nsim_dev_port->list, &nsim_dev->port_list);
949
950 return 0;
951
952err_port_debugfs_exit:
953 nsim_dev_port_debugfs_exit(nsim_dev_port);
954err_dl_port_unregister:
955 devlink_port_unregister(devlink_port);
956err_port_free:
957 kfree(nsim_dev_port);
958 return err;
959}
960
961static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port)
962{
963 struct devlink_port *devlink_port = &nsim_dev_port->devlink_port;
964
965 list_del(&nsim_dev_port->list);
966 devlink_port_type_clear(devlink_port);
967 nsim_destroy(nsim_dev_port->ns);
968 nsim_dev_port_debugfs_exit(nsim_dev_port);
969 devlink_port_unregister(devlink_port);
970 kfree(nsim_dev_port);
971}
972
973static void nsim_dev_port_del_all(struct nsim_dev *nsim_dev)
974{
975 struct nsim_dev_port *nsim_dev_port, *tmp;
976
977 mutex_lock(&nsim_dev->port_list_lock);
978 list_for_each_entry_safe(nsim_dev_port, tmp,
979 &nsim_dev->port_list, list)
980 __nsim_dev_port_del(nsim_dev_port);
981 mutex_unlock(&nsim_dev->port_list_lock);
982}
983
984static int nsim_dev_port_add_all(struct nsim_dev *nsim_dev,
985 unsigned int port_count)
986{
987 int i, err;
988
989 for (i = 0; i < port_count; i++) {
990 err = __nsim_dev_port_add(nsim_dev, i);
991 if (err)
992 goto err_port_del_all;
993 }
994 return 0;
995
996err_port_del_all:
997 nsim_dev_port_del_all(nsim_dev);
998 return err;
999}
1000
1001static int nsim_dev_reload_create(struct nsim_dev *nsim_dev,
1002 struct netlink_ext_ack *extack)
1003{
1004 struct nsim_bus_dev *nsim_bus_dev = nsim_dev->nsim_bus_dev;
1005 struct devlink *devlink;
1006 int err;
1007
1008 devlink = priv_to_devlink(nsim_dev);
1009 nsim_dev = devlink_priv(devlink);
1010 INIT_LIST_HEAD(&nsim_dev->port_list);
1011 mutex_init(&nsim_dev->port_list_lock);
1012 nsim_dev->fw_update_status = true;
1013 nsim_dev->fw_update_overwrite_mask = 0;
1014
1015 nsim_devlink_param_load_driverinit_values(devlink);
1016
1017 err = nsim_dev_dummy_region_init(nsim_dev, devlink);
1018 if (err)
1019 return err;
1020
1021 err = nsim_dev_traps_init(devlink);
1022 if (err)
1023 goto err_dummy_region_exit;
1024
1025 nsim_dev->fib_data = nsim_fib_create(devlink, extack);
1026 if (IS_ERR(nsim_dev->fib_data)) {
1027 err = PTR_ERR(nsim_dev->fib_data);
1028 goto err_traps_exit;
1029 }
1030
1031 err = nsim_dev_health_init(nsim_dev, devlink);
1032 if (err)
1033 goto err_fib_destroy;
1034
1035 err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count);
1036 if (err)
1037 goto err_health_exit;
1038
1039 nsim_dev->take_snapshot = debugfs_create_file("take_snapshot",
1040 0200,
1041 nsim_dev->ddir,
1042 nsim_dev,
1043 &nsim_dev_take_snapshot_fops);
1044 return 0;
1045
1046err_health_exit:
1047 nsim_dev_health_exit(nsim_dev);
1048err_fib_destroy:
1049 nsim_fib_destroy(devlink, nsim_dev->fib_data);
1050err_traps_exit:
1051 nsim_dev_traps_exit(devlink);
1052err_dummy_region_exit:
1053 nsim_dev_dummy_region_exit(nsim_dev);
1054 return err;
1055}
1056
1057int nsim_dev_probe(struct nsim_bus_dev *nsim_bus_dev)
1058{
1059 struct nsim_dev *nsim_dev;
1060 struct devlink *devlink;
1061 int err;
1062
1063 devlink = devlink_alloc(&nsim_dev_devlink_ops, sizeof(*nsim_dev));
1064 if (!devlink)
1065 return -ENOMEM;
1066 devlink_net_set(devlink, nsim_bus_dev->initial_net);
1067 nsim_dev = devlink_priv(devlink);
1068 nsim_dev->nsim_bus_dev = nsim_bus_dev;
1069 nsim_dev->switch_id.id_len = sizeof(nsim_dev->switch_id.id);
1070 get_random_bytes(nsim_dev->switch_id.id, nsim_dev->switch_id.id_len);
1071 INIT_LIST_HEAD(&nsim_dev->port_list);
1072 mutex_init(&nsim_dev->port_list_lock);
1073 nsim_dev->fw_update_status = true;
1074 nsim_dev->fw_update_overwrite_mask = 0;
1075 nsim_dev->max_macs = NSIM_DEV_MAX_MACS_DEFAULT;
1076 nsim_dev->test1 = NSIM_DEV_TEST1_DEFAULT;
1077 spin_lock_init(&nsim_dev->fa_cookie_lock);
1078
1079 dev_set_drvdata(&nsim_bus_dev->dev, nsim_dev);
1080
1081 err = nsim_dev_resources_register(devlink);
1082 if (err)
1083 goto err_devlink_free;
1084
1085 err = devlink_register(devlink, &nsim_bus_dev->dev);
1086 if (err)
1087 goto err_resources_unregister;
1088
1089 err = devlink_params_register(devlink, nsim_devlink_params,
1090 ARRAY_SIZE(nsim_devlink_params));
1091 if (err)
1092 goto err_dl_unregister;
1093 nsim_devlink_set_params_init_values(nsim_dev, devlink);
1094
1095 err = nsim_dev_dummy_region_init(nsim_dev, devlink);
1096 if (err)
1097 goto err_params_unregister;
1098
1099 err = nsim_dev_traps_init(devlink);
1100 if (err)
1101 goto err_dummy_region_exit;
1102
1103 err = nsim_dev_debugfs_init(nsim_dev);
1104 if (err)
1105 goto err_traps_exit;
1106
1107 nsim_dev->fib_data = nsim_fib_create(devlink, NULL);
1108 if (IS_ERR(nsim_dev->fib_data)) {
1109 err = PTR_ERR(nsim_dev->fib_data);
1110 goto err_debugfs_exit;
1111 }
1112
1113 err = nsim_dev_health_init(nsim_dev, devlink);
1114 if (err)
1115 goto err_fib_destroy;
1116
1117 err = nsim_bpf_dev_init(nsim_dev);
1118 if (err)
1119 goto err_health_exit;
1120
1121 err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count);
1122 if (err)
1123 goto err_bpf_dev_exit;
1124
1125 devlink_params_publish(devlink);
1126 devlink_reload_enable(devlink);
1127 return 0;
1128
1129err_bpf_dev_exit:
1130 nsim_bpf_dev_exit(nsim_dev);
1131err_health_exit:
1132 nsim_dev_health_exit(nsim_dev);
1133err_fib_destroy:
1134 nsim_fib_destroy(devlink, nsim_dev->fib_data);
1135err_debugfs_exit:
1136 nsim_dev_debugfs_exit(nsim_dev);
1137err_traps_exit:
1138 nsim_dev_traps_exit(devlink);
1139err_dummy_region_exit:
1140 nsim_dev_dummy_region_exit(nsim_dev);
1141err_params_unregister:
1142 devlink_params_unregister(devlink, nsim_devlink_params,
1143 ARRAY_SIZE(nsim_devlink_params));
1144err_dl_unregister:
1145 devlink_unregister(devlink);
1146err_resources_unregister:
1147 devlink_resources_unregister(devlink, NULL);
1148err_devlink_free:
1149 devlink_free(devlink);
1150 return err;
1151}
1152
1153static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev)
1154{
1155 struct devlink *devlink = priv_to_devlink(nsim_dev);
1156
1157 if (devlink_is_reload_failed(devlink))
1158 return;
1159 debugfs_remove(nsim_dev->take_snapshot);
1160 nsim_dev_port_del_all(nsim_dev);
1161 nsim_dev_health_exit(nsim_dev);
1162 nsim_fib_destroy(devlink, nsim_dev->fib_data);
1163 nsim_dev_traps_exit(devlink);
1164 nsim_dev_dummy_region_exit(nsim_dev);
1165 mutex_destroy(&nsim_dev->port_list_lock);
1166}
1167
1168void nsim_dev_remove(struct nsim_bus_dev *nsim_bus_dev)
1169{
1170 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
1171 struct devlink *devlink = priv_to_devlink(nsim_dev);
1172
1173 devlink_reload_disable(devlink);
1174
1175 nsim_dev_reload_destroy(nsim_dev);
1176
1177 nsim_bpf_dev_exit(nsim_dev);
1178 nsim_dev_debugfs_exit(nsim_dev);
1179 devlink_params_unregister(devlink, nsim_devlink_params,
1180 ARRAY_SIZE(nsim_devlink_params));
1181 devlink_unregister(devlink);
1182 devlink_resources_unregister(devlink, NULL);
1183 devlink_free(devlink);
1184}
1185
1186static struct nsim_dev_port *
1187__nsim_dev_port_lookup(struct nsim_dev *nsim_dev, unsigned int port_index)
1188{
1189 struct nsim_dev_port *nsim_dev_port;
1190
1191 list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list)
1192 if (nsim_dev_port->port_index == port_index)
1193 return nsim_dev_port;
1194 return NULL;
1195}
1196
1197int nsim_dev_port_add(struct nsim_bus_dev *nsim_bus_dev,
1198 unsigned int port_index)
1199{
1200 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
1201 int err;
1202
1203 mutex_lock(&nsim_dev->port_list_lock);
1204 if (__nsim_dev_port_lookup(nsim_dev, port_index))
1205 err = -EEXIST;
1206 else
1207 err = __nsim_dev_port_add(nsim_dev, port_index);
1208 mutex_unlock(&nsim_dev->port_list_lock);
1209 return err;
1210}
1211
1212int nsim_dev_port_del(struct nsim_bus_dev *nsim_bus_dev,
1213 unsigned int port_index)
1214{
1215 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
1216 struct nsim_dev_port *nsim_dev_port;
1217 int err = 0;
1218
1219 mutex_lock(&nsim_dev->port_list_lock);
1220 nsim_dev_port = __nsim_dev_port_lookup(nsim_dev, port_index);
1221 if (!nsim_dev_port)
1222 err = -ENOENT;
1223 else
1224 __nsim_dev_port_del(nsim_dev_port);
1225 mutex_unlock(&nsim_dev->port_list_lock);
1226 return err;
1227}
1228
1229int nsim_dev_init(void)
1230{
1231 nsim_dev_ddir = debugfs_create_dir(DRV_NAME, NULL);
1232 return PTR_ERR_OR_ZERO(nsim_dev_ddir);
1233}
1234
1235void nsim_dev_exit(void)
1236{
1237 debugfs_remove_recursive(nsim_dev_ddir);
1238}
1239
