This source file includes following definitions.
- nsim_dev_take_snapshot_write
- nsim_dev_debugfs_init
- nsim_dev_debugfs_exit
- nsim_dev_port_debugfs_init
- nsim_dev_port_debugfs_exit
- nsim_devlink_net
- nsim_dev_ipv4_fib_resource_occ_get
- nsim_dev_ipv4_fib_rules_res_occ_get
- nsim_dev_ipv6_fib_resource_occ_get
- nsim_dev_ipv6_fib_rules_res_occ_get
- nsim_dev_resources_register
- nsim_devlink_set_params_init_values
- nsim_devlink_param_load_driverinit_values
- nsim_dev_dummy_region_init
- nsim_dev_dummy_region_exit
- nsim_dev_trap_skb_build
- nsim_dev_trap_report
- nsim_dev_trap_report_work
- nsim_dev_traps_init
- nsim_dev_traps_exit
- nsim_dev_reload_down
- nsim_dev_reload_up
- nsim_dev_flash_update
- nsim_dev_trap_item_lookup
- nsim_dev_devlink_trap_init
- nsim_dev_devlink_trap_action_set
- nsim_dev_create
- nsim_dev_destroy
- __nsim_dev_port_add
- __nsim_dev_port_del
- nsim_dev_port_del_all
- nsim_dev_probe
- nsim_dev_remove
- __nsim_dev_port_lookup
- nsim_dev_port_add
- nsim_dev_port_del
- nsim_dev_init
- nsim_dev_exit
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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 <uapi/linux/devlink.h>
32 #include <uapi/linux/ip.h>
33 #include <uapi/linux/udp.h>
34
35 #include "netdevsim.h"
36
37 static struct dentry *nsim_dev_ddir;
38
39 #define NSIM_DEV_DUMMY_REGION_SIZE (1024 * 32)
40
41 static ssize_t nsim_dev_take_snapshot_write(struct file *file,
42 const char __user *data,
43 size_t count, loff_t *ppos)
44 {
45 struct nsim_dev *nsim_dev = file->private_data;
46 void *dummy_data;
47 int err;
48 u32 id;
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 id = devlink_region_shapshot_id_get(priv_to_devlink(nsim_dev));
57 err = devlink_region_snapshot_create(nsim_dev->dummy_region,
58 dummy_data, id, kfree);
59 if (err) {
60 pr_err("Failed to create region snapshot\n");
61 kfree(dummy_data);
62 return err;
63 }
64
65 return count;
66 }
67
68 static const struct file_operations nsim_dev_take_snapshot_fops = {
69 .open = simple_open,
70 .write = nsim_dev_take_snapshot_write,
71 .llseek = generic_file_llseek,
72 };
73
74 static int nsim_dev_debugfs_init(struct nsim_dev *nsim_dev)
75 {
76 char dev_ddir_name[sizeof(DRV_NAME) + 10];
77
78 sprintf(dev_ddir_name, DRV_NAME "%u", nsim_dev->nsim_bus_dev->dev.id);
79 nsim_dev->ddir = debugfs_create_dir(dev_ddir_name, nsim_dev_ddir);
80 if (IS_ERR_OR_NULL(nsim_dev->ddir))
81 return PTR_ERR_OR_ZERO(nsim_dev->ddir) ?: -EINVAL;
82 nsim_dev->ports_ddir = debugfs_create_dir("ports", nsim_dev->ddir);
83 if (IS_ERR_OR_NULL(nsim_dev->ports_ddir))
84 return PTR_ERR_OR_ZERO(nsim_dev->ports_ddir) ?: -EINVAL;
85 debugfs_create_bool("fw_update_status", 0600, nsim_dev->ddir,
86 &nsim_dev->fw_update_status);
87 debugfs_create_u32("max_macs", 0600, nsim_dev->ddir,
88 &nsim_dev->max_macs);
89 debugfs_create_bool("test1", 0600, nsim_dev->ddir,
90 &nsim_dev->test1);
91 debugfs_create_file("take_snapshot", 0200, nsim_dev->ddir, nsim_dev,
92 &nsim_dev_take_snapshot_fops);
93 return 0;
94 }
95
96 static void nsim_dev_debugfs_exit(struct nsim_dev *nsim_dev)
97 {
98 debugfs_remove_recursive(nsim_dev->ports_ddir);
99 debugfs_remove_recursive(nsim_dev->ddir);
100 }
101
102 static int nsim_dev_port_debugfs_init(struct nsim_dev *nsim_dev,
103 struct nsim_dev_port *nsim_dev_port)
104 {
105 char port_ddir_name[16];
106 char dev_link_name[32];
107
108 sprintf(port_ddir_name, "%u", nsim_dev_port->port_index);
109 nsim_dev_port->ddir = debugfs_create_dir(port_ddir_name,
110 nsim_dev->ports_ddir);
111 if (IS_ERR_OR_NULL(nsim_dev_port->ddir))
112 return -ENOMEM;
113
114 sprintf(dev_link_name, "../../../" DRV_NAME "%u",
115 nsim_dev->nsim_bus_dev->dev.id);
116 debugfs_create_symlink("dev", nsim_dev_port->ddir, dev_link_name);
117
118 return 0;
119 }
120
121 static void nsim_dev_port_debugfs_exit(struct nsim_dev_port *nsim_dev_port)
122 {
123 debugfs_remove_recursive(nsim_dev_port->ddir);
124 }
125
126 static struct net *nsim_devlink_net(struct devlink *devlink)
127 {
128 return &init_net;
129 }
130
131 static u64 nsim_dev_ipv4_fib_resource_occ_get(void *priv)
132 {
133 struct net *net = priv;
134
135 return nsim_fib_get_val(net, NSIM_RESOURCE_IPV4_FIB, false);
136 }
137
138 static u64 nsim_dev_ipv4_fib_rules_res_occ_get(void *priv)
139 {
140 struct net *net = priv;
141
142 return nsim_fib_get_val(net, NSIM_RESOURCE_IPV4_FIB_RULES, false);
143 }
144
145 static u64 nsim_dev_ipv6_fib_resource_occ_get(void *priv)
146 {
147 struct net *net = priv;
148
149 return nsim_fib_get_val(net, NSIM_RESOURCE_IPV6_FIB, false);
150 }
151
152 static u64 nsim_dev_ipv6_fib_rules_res_occ_get(void *priv)
153 {
154 struct net *net = priv;
155
156 return nsim_fib_get_val(net, NSIM_RESOURCE_IPV6_FIB_RULES, false);
157 }
158
159 static int nsim_dev_resources_register(struct devlink *devlink)
160 {
161 struct devlink_resource_size_params params = {
162 .size_max = (u64)-1,
163 .size_granularity = 1,
164 .unit = DEVLINK_RESOURCE_UNIT_ENTRY
165 };
166 struct net *net = nsim_devlink_net(devlink);
167 int err;
168 u64 n;
169
170
171 err = devlink_resource_register(devlink, "IPv4", (u64)-1,
172 NSIM_RESOURCE_IPV4,
173 DEVLINK_RESOURCE_ID_PARENT_TOP,
174 ¶ms);
175 if (err) {
176 pr_err("Failed to register IPv4 top resource\n");
177 goto out;
178 }
179
180 n = nsim_fib_get_val(net, NSIM_RESOURCE_IPV4_FIB, true);
181 err = devlink_resource_register(devlink, "fib", n,
182 NSIM_RESOURCE_IPV4_FIB,
183 NSIM_RESOURCE_IPV4, ¶ms);
184 if (err) {
185 pr_err("Failed to register IPv4 FIB resource\n");
186 return err;
187 }
188
189 n = nsim_fib_get_val(net, NSIM_RESOURCE_IPV4_FIB_RULES, true);
190 err = devlink_resource_register(devlink, "fib-rules", n,
191 NSIM_RESOURCE_IPV4_FIB_RULES,
192 NSIM_RESOURCE_IPV4, ¶ms);
193 if (err) {
194 pr_err("Failed to register IPv4 FIB rules resource\n");
195 return err;
196 }
197
198
199 err = devlink_resource_register(devlink, "IPv6", (u64)-1,
200 NSIM_RESOURCE_IPV6,
201 DEVLINK_RESOURCE_ID_PARENT_TOP,
202 ¶ms);
203 if (err) {
204 pr_err("Failed to register IPv6 top resource\n");
205 goto out;
206 }
207
208 n = nsim_fib_get_val(net, NSIM_RESOURCE_IPV6_FIB, true);
209 err = devlink_resource_register(devlink, "fib", n,
210 NSIM_RESOURCE_IPV6_FIB,
211 NSIM_RESOURCE_IPV6, ¶ms);
212 if (err) {
213 pr_err("Failed to register IPv6 FIB resource\n");
214 return err;
215 }
216
217 n = nsim_fib_get_val(net, NSIM_RESOURCE_IPV6_FIB_RULES, true);
218 err = devlink_resource_register(devlink, "fib-rules", n,
219 NSIM_RESOURCE_IPV6_FIB_RULES,
220 NSIM_RESOURCE_IPV6, ¶ms);
221 if (err) {
222 pr_err("Failed to register IPv6 FIB rules resource\n");
223 return err;
224 }
225
226 devlink_resource_occ_get_register(devlink,
227 NSIM_RESOURCE_IPV4_FIB,
228 nsim_dev_ipv4_fib_resource_occ_get,
229 net);
230 devlink_resource_occ_get_register(devlink,
231 NSIM_RESOURCE_IPV4_FIB_RULES,
232 nsim_dev_ipv4_fib_rules_res_occ_get,
233 net);
234 devlink_resource_occ_get_register(devlink,
235 NSIM_RESOURCE_IPV6_FIB,
236 nsim_dev_ipv6_fib_resource_occ_get,
237 net);
238 devlink_resource_occ_get_register(devlink,
239 NSIM_RESOURCE_IPV6_FIB_RULES,
240 nsim_dev_ipv6_fib_rules_res_occ_get,
241 net);
242 out:
243 return err;
244 }
245
246 enum nsim_devlink_param_id {
247 NSIM_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX,
248 NSIM_DEVLINK_PARAM_ID_TEST1,
249 };
250
251 static const struct devlink_param nsim_devlink_params[] = {
252 DEVLINK_PARAM_GENERIC(MAX_MACS,
253 BIT(DEVLINK_PARAM_CMODE_DRIVERINIT),
254 NULL, NULL, NULL),
255 DEVLINK_PARAM_DRIVER(NSIM_DEVLINK_PARAM_ID_TEST1,
256 "test1", DEVLINK_PARAM_TYPE_BOOL,
257 BIT(DEVLINK_PARAM_CMODE_DRIVERINIT),
258 NULL, NULL, NULL),
259 };
260
261 static void nsim_devlink_set_params_init_values(struct nsim_dev *nsim_dev,
262 struct devlink *devlink)
263 {
264 union devlink_param_value value;
265
266 value.vu32 = nsim_dev->max_macs;
267 devlink_param_driverinit_value_set(devlink,
268 DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
269 value);
270 value.vbool = nsim_dev->test1;
271 devlink_param_driverinit_value_set(devlink,
272 NSIM_DEVLINK_PARAM_ID_TEST1,
273 value);
274 }
275
276 static void nsim_devlink_param_load_driverinit_values(struct devlink *devlink)
277 {
278 struct nsim_dev *nsim_dev = devlink_priv(devlink);
279 union devlink_param_value saved_value;
280 int err;
281
282 err = devlink_param_driverinit_value_get(devlink,
283 DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
284 &saved_value);
285 if (!err)
286 nsim_dev->max_macs = saved_value.vu32;
287 err = devlink_param_driverinit_value_get(devlink,
288 NSIM_DEVLINK_PARAM_ID_TEST1,
289 &saved_value);
290 if (!err)
291 nsim_dev->test1 = saved_value.vbool;
292 }
293
294 #define NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX 16
295
296 static int nsim_dev_dummy_region_init(struct nsim_dev *nsim_dev,
297 struct devlink *devlink)
298 {
299 nsim_dev->dummy_region =
300 devlink_region_create(devlink, "dummy",
301 NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX,
302 NSIM_DEV_DUMMY_REGION_SIZE);
303 return PTR_ERR_OR_ZERO(nsim_dev->dummy_region);
304 }
305
306 static void nsim_dev_dummy_region_exit(struct nsim_dev *nsim_dev)
307 {
308 devlink_region_destroy(nsim_dev->dummy_region);
309 }
310
311 struct nsim_trap_item {
312 void *trap_ctx;
313 enum devlink_trap_action action;
314 };
315
316 struct nsim_trap_data {
317 struct delayed_work trap_report_dw;
318 struct nsim_trap_item *trap_items_arr;
319 struct nsim_dev *nsim_dev;
320 spinlock_t trap_lock;
321 };
322
323
324
325
326 enum {
327 NSIM_TRAP_ID_BASE = DEVLINK_TRAP_GENERIC_ID_MAX,
328 NSIM_TRAP_ID_FID_MISS,
329 };
330
331 #define NSIM_TRAP_NAME_FID_MISS "fid_miss"
332
333 #define NSIM_TRAP_METADATA DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT
334
335 #define NSIM_TRAP_DROP(_id, _group_id) \
336 DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \
337 DEVLINK_TRAP_GROUP_GENERIC(_group_id), \
338 NSIM_TRAP_METADATA)
339 #define NSIM_TRAP_EXCEPTION(_id, _group_id) \
340 DEVLINK_TRAP_GENERIC(EXCEPTION, TRAP, _id, \
341 DEVLINK_TRAP_GROUP_GENERIC(_group_id), \
342 NSIM_TRAP_METADATA)
343 #define NSIM_TRAP_DRIVER_EXCEPTION(_id, _group_id) \
344 DEVLINK_TRAP_DRIVER(EXCEPTION, TRAP, NSIM_TRAP_ID_##_id, \
345 NSIM_TRAP_NAME_##_id, \
346 DEVLINK_TRAP_GROUP_GENERIC(_group_id), \
347 NSIM_TRAP_METADATA)
348
349 static const struct devlink_trap nsim_traps_arr[] = {
350 NSIM_TRAP_DROP(SMAC_MC, L2_DROPS),
351 NSIM_TRAP_DROP(VLAN_TAG_MISMATCH, L2_DROPS),
352 NSIM_TRAP_DROP(INGRESS_VLAN_FILTER, L2_DROPS),
353 NSIM_TRAP_DROP(INGRESS_STP_FILTER, L2_DROPS),
354 NSIM_TRAP_DROP(EMPTY_TX_LIST, L2_DROPS),
355 NSIM_TRAP_DROP(PORT_LOOPBACK_FILTER, L2_DROPS),
356 NSIM_TRAP_DRIVER_EXCEPTION(FID_MISS, L2_DROPS),
357 NSIM_TRAP_DROP(BLACKHOLE_ROUTE, L3_DROPS),
358 NSIM_TRAP_EXCEPTION(TTL_ERROR, L3_DROPS),
359 NSIM_TRAP_DROP(TAIL_DROP, BUFFER_DROPS),
360 };
361
362 #define NSIM_TRAP_L4_DATA_LEN 100
363
364 static struct sk_buff *nsim_dev_trap_skb_build(void)
365 {
366 int tot_len, data_len = NSIM_TRAP_L4_DATA_LEN;
367 struct sk_buff *skb;
368 struct udphdr *udph;
369 struct ethhdr *eth;
370 struct iphdr *iph;
371
372 skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
373 if (!skb)
374 return NULL;
375 tot_len = sizeof(struct iphdr) + sizeof(struct udphdr) + data_len;
376
377 skb_reset_mac_header(skb);
378 eth = skb_put(skb, sizeof(struct ethhdr));
379 eth_random_addr(eth->h_dest);
380 eth_random_addr(eth->h_source);
381 eth->h_proto = htons(ETH_P_IP);
382 skb->protocol = htons(ETH_P_IP);
383
384 skb_set_network_header(skb, skb->len);
385 iph = skb_put(skb, sizeof(struct iphdr));
386 iph->protocol = IPPROTO_UDP;
387 iph->saddr = in_aton("192.0.2.1");
388 iph->daddr = in_aton("198.51.100.1");
389 iph->version = 0x4;
390 iph->frag_off = 0;
391 iph->ihl = 0x5;
392 iph->tot_len = htons(tot_len);
393 iph->ttl = 100;
394 iph->check = 0;
395 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
396
397 skb_set_transport_header(skb, skb->len);
398 udph = skb_put_zero(skb, sizeof(struct udphdr) + data_len);
399 get_random_bytes(&udph->source, sizeof(u16));
400 get_random_bytes(&udph->dest, sizeof(u16));
401 udph->len = htons(sizeof(struct udphdr) + data_len);
402
403 return skb;
404 }
405
406 static void nsim_dev_trap_report(struct nsim_dev_port *nsim_dev_port)
407 {
408 struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev;
409 struct devlink *devlink = priv_to_devlink(nsim_dev);
410 struct nsim_trap_data *nsim_trap_data;
411 int i;
412
413 nsim_trap_data = nsim_dev->trap_data;
414
415 spin_lock(&nsim_trap_data->trap_lock);
416 for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) {
417 struct nsim_trap_item *nsim_trap_item;
418 struct sk_buff *skb;
419
420 nsim_trap_item = &nsim_trap_data->trap_items_arr[i];
421 if (nsim_trap_item->action == DEVLINK_TRAP_ACTION_DROP)
422 continue;
423
424 skb = nsim_dev_trap_skb_build();
425 if (!skb)
426 continue;
427 skb->dev = nsim_dev_port->ns->netdev;
428
429
430
431
432
433
434 local_bh_disable();
435 devlink_trap_report(devlink, skb, nsim_trap_item->trap_ctx,
436 &nsim_dev_port->devlink_port);
437 local_bh_enable();
438 consume_skb(skb);
439 }
440 spin_unlock(&nsim_trap_data->trap_lock);
441 }
442
443 #define NSIM_TRAP_REPORT_INTERVAL_MS 100
444
445 static void nsim_dev_trap_report_work(struct work_struct *work)
446 {
447 struct nsim_trap_data *nsim_trap_data;
448 struct nsim_dev_port *nsim_dev_port;
449 struct nsim_dev *nsim_dev;
450
451 nsim_trap_data = container_of(work, struct nsim_trap_data,
452 trap_report_dw.work);
453 nsim_dev = nsim_trap_data->nsim_dev;
454
455
456
457
458 mutex_lock(&nsim_dev->port_list_lock);
459 list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list) {
460 if (!netif_running(nsim_dev_port->ns->netdev))
461 continue;
462
463 nsim_dev_trap_report(nsim_dev_port);
464 }
465 mutex_unlock(&nsim_dev->port_list_lock);
466
467 schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw,
468 msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS));
469 }
470
471 static int nsim_dev_traps_init(struct devlink *devlink)
472 {
473 struct nsim_dev *nsim_dev = devlink_priv(devlink);
474 struct nsim_trap_data *nsim_trap_data;
475 int err;
476
477 nsim_trap_data = kzalloc(sizeof(*nsim_trap_data), GFP_KERNEL);
478 if (!nsim_trap_data)
479 return -ENOMEM;
480
481 nsim_trap_data->trap_items_arr = kcalloc(ARRAY_SIZE(nsim_traps_arr),
482 sizeof(struct nsim_trap_item),
483 GFP_KERNEL);
484 if (!nsim_trap_data->trap_items_arr) {
485 err = -ENOMEM;
486 goto err_trap_data_free;
487 }
488
489
490
491
492
493 spin_lock_init(&nsim_trap_data->trap_lock);
494 nsim_trap_data->nsim_dev = nsim_dev;
495 nsim_dev->trap_data = nsim_trap_data;
496
497 err = devlink_traps_register(devlink, nsim_traps_arr,
498 ARRAY_SIZE(nsim_traps_arr), NULL);
499 if (err)
500 goto err_trap_items_free;
501
502 INIT_DELAYED_WORK(&nsim_dev->trap_data->trap_report_dw,
503 nsim_dev_trap_report_work);
504 schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw,
505 msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS));
506
507 return 0;
508
509 err_trap_items_free:
510 kfree(nsim_trap_data->trap_items_arr);
511 err_trap_data_free:
512 kfree(nsim_trap_data);
513 return err;
514 }
515
516 static void nsim_dev_traps_exit(struct devlink *devlink)
517 {
518 struct nsim_dev *nsim_dev = devlink_priv(devlink);
519
520 cancel_delayed_work_sync(&nsim_dev->trap_data->trap_report_dw);
521 devlink_traps_unregister(devlink, nsim_traps_arr,
522 ARRAY_SIZE(nsim_traps_arr));
523 kfree(nsim_dev->trap_data->trap_items_arr);
524 kfree(nsim_dev->trap_data);
525 }
526
527 static int nsim_dev_reload_down(struct devlink *devlink,
528 struct netlink_ext_ack *extack)
529 {
530 return 0;
531 }
532
533 static int nsim_dev_reload_up(struct devlink *devlink,
534 struct netlink_ext_ack *extack)
535 {
536 enum nsim_resource_id res_ids[] = {
537 NSIM_RESOURCE_IPV4_FIB, NSIM_RESOURCE_IPV4_FIB_RULES,
538 NSIM_RESOURCE_IPV6_FIB, NSIM_RESOURCE_IPV6_FIB_RULES
539 };
540 struct net *net = nsim_devlink_net(devlink);
541 int i;
542
543 for (i = 0; i < ARRAY_SIZE(res_ids); ++i) {
544 int err;
545 u64 val;
546
547 err = devlink_resource_size_get(devlink, res_ids[i], &val);
548 if (!err) {
549 err = nsim_fib_set_max(net, res_ids[i], val, extack);
550 if (err)
551 return err;
552 }
553 }
554 nsim_devlink_param_load_driverinit_values(devlink);
555
556 return 0;
557 }
558
559 #define NSIM_DEV_FLASH_SIZE 500000
560 #define NSIM_DEV_FLASH_CHUNK_SIZE 1000
561 #define NSIM_DEV_FLASH_CHUNK_TIME_MS 10
562
563 static int nsim_dev_flash_update(struct devlink *devlink, const char *file_name,
564 const char *component,
565 struct netlink_ext_ack *extack)
566 {
567 struct nsim_dev *nsim_dev = devlink_priv(devlink);
568 int i;
569
570 if (nsim_dev->fw_update_status) {
571 devlink_flash_update_begin_notify(devlink);
572 devlink_flash_update_status_notify(devlink,
573 "Preparing to flash",
574 component, 0, 0);
575 }
576
577 for (i = 0; i < NSIM_DEV_FLASH_SIZE / NSIM_DEV_FLASH_CHUNK_SIZE; i++) {
578 if (nsim_dev->fw_update_status)
579 devlink_flash_update_status_notify(devlink, "Flashing",
580 component,
581 i * NSIM_DEV_FLASH_CHUNK_SIZE,
582 NSIM_DEV_FLASH_SIZE);
583 msleep(NSIM_DEV_FLASH_CHUNK_TIME_MS);
584 }
585
586 if (nsim_dev->fw_update_status) {
587 devlink_flash_update_status_notify(devlink, "Flashing",
588 component,
589 NSIM_DEV_FLASH_SIZE,
590 NSIM_DEV_FLASH_SIZE);
591 devlink_flash_update_status_notify(devlink, "Flashing done",
592 component, 0, 0);
593 devlink_flash_update_end_notify(devlink);
594 }
595
596 return 0;
597 }
598
599 static struct nsim_trap_item *
600 nsim_dev_trap_item_lookup(struct nsim_dev *nsim_dev, u16 trap_id)
601 {
602 struct nsim_trap_data *nsim_trap_data = nsim_dev->trap_data;
603 int i;
604
605 for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) {
606 if (nsim_traps_arr[i].id == trap_id)
607 return &nsim_trap_data->trap_items_arr[i];
608 }
609
610 return NULL;
611 }
612
613 static int nsim_dev_devlink_trap_init(struct devlink *devlink,
614 const struct devlink_trap *trap,
615 void *trap_ctx)
616 {
617 struct nsim_dev *nsim_dev = devlink_priv(devlink);
618 struct nsim_trap_item *nsim_trap_item;
619
620 nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id);
621 if (WARN_ON(!nsim_trap_item))
622 return -ENOENT;
623
624 nsim_trap_item->trap_ctx = trap_ctx;
625 nsim_trap_item->action = trap->init_action;
626
627 return 0;
628 }
629
630 static int
631 nsim_dev_devlink_trap_action_set(struct devlink *devlink,
632 const struct devlink_trap *trap,
633 enum devlink_trap_action action)
634 {
635 struct nsim_dev *nsim_dev = devlink_priv(devlink);
636 struct nsim_trap_item *nsim_trap_item;
637
638 nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id);
639 if (WARN_ON(!nsim_trap_item))
640 return -ENOENT;
641
642 spin_lock(&nsim_dev->trap_data->trap_lock);
643 nsim_trap_item->action = action;
644 spin_unlock(&nsim_dev->trap_data->trap_lock);
645
646 return 0;
647 }
648
649 static const struct devlink_ops nsim_dev_devlink_ops = {
650 .reload_down = nsim_dev_reload_down,
651 .reload_up = nsim_dev_reload_up,
652 .flash_update = nsim_dev_flash_update,
653 .trap_init = nsim_dev_devlink_trap_init,
654 .trap_action_set = nsim_dev_devlink_trap_action_set,
655 };
656
657 #define NSIM_DEV_MAX_MACS_DEFAULT 32
658 #define NSIM_DEV_TEST1_DEFAULT true
659
660 static struct nsim_dev *
661 nsim_dev_create(struct nsim_bus_dev *nsim_bus_dev, unsigned int port_count)
662 {
663 struct nsim_dev *nsim_dev;
664 struct devlink *devlink;
665 int err;
666
667 devlink = devlink_alloc(&nsim_dev_devlink_ops, sizeof(*nsim_dev));
668 if (!devlink)
669 return ERR_PTR(-ENOMEM);
670 nsim_dev = devlink_priv(devlink);
671 nsim_dev->nsim_bus_dev = nsim_bus_dev;
672 nsim_dev->switch_id.id_len = sizeof(nsim_dev->switch_id.id);
673 get_random_bytes(nsim_dev->switch_id.id, nsim_dev->switch_id.id_len);
674 INIT_LIST_HEAD(&nsim_dev->port_list);
675 mutex_init(&nsim_dev->port_list_lock);
676 nsim_dev->fw_update_status = true;
677 nsim_dev->max_macs = NSIM_DEV_MAX_MACS_DEFAULT;
678 nsim_dev->test1 = NSIM_DEV_TEST1_DEFAULT;
679
680 err = nsim_dev_resources_register(devlink);
681 if (err)
682 goto err_devlink_free;
683
684 err = devlink_register(devlink, &nsim_bus_dev->dev);
685 if (err)
686 goto err_resources_unregister;
687
688 err = devlink_params_register(devlink, nsim_devlink_params,
689 ARRAY_SIZE(nsim_devlink_params));
690 if (err)
691 goto err_dl_unregister;
692 nsim_devlink_set_params_init_values(nsim_dev, devlink);
693
694 err = nsim_dev_dummy_region_init(nsim_dev, devlink);
695 if (err)
696 goto err_params_unregister;
697
698 err = nsim_dev_traps_init(devlink);
699 if (err)
700 goto err_dummy_region_exit;
701
702 err = nsim_dev_debugfs_init(nsim_dev);
703 if (err)
704 goto err_traps_exit;
705
706 err = nsim_bpf_dev_init(nsim_dev);
707 if (err)
708 goto err_debugfs_exit;
709
710 devlink_params_publish(devlink);
711 devlink_reload_enable(devlink);
712 return nsim_dev;
713
714 err_debugfs_exit:
715 nsim_dev_debugfs_exit(nsim_dev);
716 err_traps_exit:
717 nsim_dev_traps_exit(devlink);
718 err_dummy_region_exit:
719 nsim_dev_dummy_region_exit(nsim_dev);
720 err_params_unregister:
721 devlink_params_unregister(devlink, nsim_devlink_params,
722 ARRAY_SIZE(nsim_devlink_params));
723 err_dl_unregister:
724 devlink_unregister(devlink);
725 err_resources_unregister:
726 devlink_resources_unregister(devlink, NULL);
727 err_devlink_free:
728 devlink_free(devlink);
729 return ERR_PTR(err);
730 }
731
732 static void nsim_dev_destroy(struct nsim_dev *nsim_dev)
733 {
734 struct devlink *devlink = priv_to_devlink(nsim_dev);
735
736 devlink_reload_disable(devlink);
737 nsim_bpf_dev_exit(nsim_dev);
738 nsim_dev_debugfs_exit(nsim_dev);
739 nsim_dev_traps_exit(devlink);
740 nsim_dev_dummy_region_exit(nsim_dev);
741 devlink_params_unregister(devlink, nsim_devlink_params,
742 ARRAY_SIZE(nsim_devlink_params));
743 devlink_unregister(devlink);
744 devlink_resources_unregister(devlink, NULL);
745 mutex_destroy(&nsim_dev->port_list_lock);
746 devlink_free(devlink);
747 }
748
749 static int __nsim_dev_port_add(struct nsim_dev *nsim_dev,
750 unsigned int port_index)
751 {
752 struct nsim_dev_port *nsim_dev_port;
753 struct devlink_port *devlink_port;
754 int err;
755
756 nsim_dev_port = kzalloc(sizeof(*nsim_dev_port), GFP_KERNEL);
757 if (!nsim_dev_port)
758 return -ENOMEM;
759 nsim_dev_port->port_index = port_index;
760
761 devlink_port = &nsim_dev_port->devlink_port;
762 devlink_port_attrs_set(devlink_port, DEVLINK_PORT_FLAVOUR_PHYSICAL,
763 port_index + 1, 0, 0,
764 nsim_dev->switch_id.id,
765 nsim_dev->switch_id.id_len);
766 err = devlink_port_register(priv_to_devlink(nsim_dev), devlink_port,
767 port_index);
768 if (err)
769 goto err_port_free;
770
771 err = nsim_dev_port_debugfs_init(nsim_dev, nsim_dev_port);
772 if (err)
773 goto err_dl_port_unregister;
774
775 nsim_dev_port->ns = nsim_create(nsim_dev, nsim_dev_port);
776 if (IS_ERR(nsim_dev_port->ns)) {
777 err = PTR_ERR(nsim_dev_port->ns);
778 goto err_port_debugfs_exit;
779 }
780
781 devlink_port_type_eth_set(devlink_port, nsim_dev_port->ns->netdev);
782 list_add(&nsim_dev_port->list, &nsim_dev->port_list);
783
784 return 0;
785
786 err_port_debugfs_exit:
787 nsim_dev_port_debugfs_exit(nsim_dev_port);
788 err_dl_port_unregister:
789 devlink_port_unregister(devlink_port);
790 err_port_free:
791 kfree(nsim_dev_port);
792 return err;
793 }
794
795 static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port)
796 {
797 struct devlink_port *devlink_port = &nsim_dev_port->devlink_port;
798
799 list_del(&nsim_dev_port->list);
800 devlink_port_type_clear(devlink_port);
801 nsim_destroy(nsim_dev_port->ns);
802 nsim_dev_port_debugfs_exit(nsim_dev_port);
803 devlink_port_unregister(devlink_port);
804 kfree(nsim_dev_port);
805 }
806
807 static void nsim_dev_port_del_all(struct nsim_dev *nsim_dev)
808 {
809 struct nsim_dev_port *nsim_dev_port, *tmp;
810
811 mutex_lock(&nsim_dev->port_list_lock);
812 list_for_each_entry_safe(nsim_dev_port, tmp,
813 &nsim_dev->port_list, list)
814 __nsim_dev_port_del(nsim_dev_port);
815 mutex_unlock(&nsim_dev->port_list_lock);
816 }
817
818 int nsim_dev_probe(struct nsim_bus_dev *nsim_bus_dev)
819 {
820 struct nsim_dev *nsim_dev;
821 int i;
822 int err;
823
824 nsim_dev = nsim_dev_create(nsim_bus_dev, nsim_bus_dev->port_count);
825 if (IS_ERR(nsim_dev))
826 return PTR_ERR(nsim_dev);
827 dev_set_drvdata(&nsim_bus_dev->dev, nsim_dev);
828
829 mutex_lock(&nsim_dev->port_list_lock);
830 for (i = 0; i < nsim_bus_dev->port_count; i++) {
831 err = __nsim_dev_port_add(nsim_dev, i);
832 if (err)
833 goto err_port_del_all;
834 }
835 mutex_unlock(&nsim_dev->port_list_lock);
836 return 0;
837
838 err_port_del_all:
839 mutex_unlock(&nsim_dev->port_list_lock);
840 nsim_dev_port_del_all(nsim_dev);
841 nsim_dev_destroy(nsim_dev);
842 return err;
843 }
844
845 void nsim_dev_remove(struct nsim_bus_dev *nsim_bus_dev)
846 {
847 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
848
849 nsim_dev_port_del_all(nsim_dev);
850 nsim_dev_destroy(nsim_dev);
851 }
852
853 static struct nsim_dev_port *
854 __nsim_dev_port_lookup(struct nsim_dev *nsim_dev, unsigned int port_index)
855 {
856 struct nsim_dev_port *nsim_dev_port;
857
858 list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list)
859 if (nsim_dev_port->port_index == port_index)
860 return nsim_dev_port;
861 return NULL;
862 }
863
864 int nsim_dev_port_add(struct nsim_bus_dev *nsim_bus_dev,
865 unsigned int port_index)
866 {
867 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
868 int err;
869
870 mutex_lock(&nsim_dev->port_list_lock);
871 if (__nsim_dev_port_lookup(nsim_dev, port_index))
872 err = -EEXIST;
873 else
874 err = __nsim_dev_port_add(nsim_dev, port_index);
875 mutex_unlock(&nsim_dev->port_list_lock);
876 return err;
877 }
878
879 int nsim_dev_port_del(struct nsim_bus_dev *nsim_bus_dev,
880 unsigned int port_index)
881 {
882 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
883 struct nsim_dev_port *nsim_dev_port;
884 int err = 0;
885
886 mutex_lock(&nsim_dev->port_list_lock);
887 nsim_dev_port = __nsim_dev_port_lookup(nsim_dev, port_index);
888 if (!nsim_dev_port)
889 err = -ENOENT;
890 else
891 __nsim_dev_port_del(nsim_dev_port);
892 mutex_unlock(&nsim_dev->port_list_lock);
893 return err;
894 }
895
896 int nsim_dev_init(void)
897 {
898 nsim_dev_ddir = debugfs_create_dir(DRV_NAME, NULL);
899 if (IS_ERR_OR_NULL(nsim_dev_ddir))
900 return -ENOMEM;
901 return 0;
902 }
903
904 void nsim_dev_exit(void)
905 {
906 debugfs_remove_recursive(nsim_dev_ddir);
907 }