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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 unsigned int
39nsim_dev_port_index(enum nsim_dev_port_type type, unsigned int port_index)
40{
41 switch (type) {
42 case NSIM_DEV_PORT_TYPE_VF:
43 port_index = NSIM_DEV_VF_PORT_INDEX_BASE + port_index;
44 break;
45 case NSIM_DEV_PORT_TYPE_PF:
46 break;
47 }
48
49 return port_index;
50}
51
52static inline unsigned int nsim_dev_port_index_to_vf_index(unsigned int port_index)
53{
54 return port_index - NSIM_DEV_VF_PORT_INDEX_BASE;
55}
56
57static struct dentry *nsim_dev_ddir;
58
59unsigned int nsim_dev_get_vfs(struct nsim_dev *nsim_dev)
60{
61 WARN_ON(!lockdep_rtnl_is_held() &&
62 !devl_lock_is_held(priv_to_devlink(nsim_dev)));
63
64 return nsim_dev->nsim_bus_dev->num_vfs;
65}
66
67static void
68nsim_bus_dev_set_vfs(struct nsim_bus_dev *nsim_bus_dev, unsigned int num_vfs)
69{
70 rtnl_lock();
71 nsim_bus_dev->num_vfs = num_vfs;
72 rtnl_unlock();
73}
74
75#define NSIM_DEV_DUMMY_REGION_SIZE (1024 * 32)
76
77static int
78nsim_dev_take_snapshot(struct devlink *devlink,
79 const struct devlink_region_ops *ops,
80 struct netlink_ext_ack *extack,
81 u8 **data)
82{
83 void *dummy_data;
84
85 dummy_data = kmalloc(NSIM_DEV_DUMMY_REGION_SIZE, GFP_KERNEL);
86 if (!dummy_data)
87 return -ENOMEM;
88
89 get_random_bytes(dummy_data, NSIM_DEV_DUMMY_REGION_SIZE);
90
91 *data = dummy_data;
92
93 return 0;
94}
95
96static ssize_t nsim_dev_take_snapshot_write(struct file *file,
97 const char __user *data,
98 size_t count, loff_t *ppos)
99{
100 struct nsim_dev *nsim_dev = file->private_data;
101 struct devlink *devlink;
102 u8 *dummy_data;
103 int err;
104 u32 id;
105
106 devlink = priv_to_devlink(nsim_dev);
107
108 err = nsim_dev_take_snapshot(devlink, NULL, NULL, &dummy_data);
109 if (err)
110 return err;
111
112 err = devlink_region_snapshot_id_get(devlink, &id);
113 if (err) {
114 pr_err("Failed to get snapshot id\n");
115 kfree(dummy_data);
116 return err;
117 }
118 err = devlink_region_snapshot_create(nsim_dev->dummy_region,
119 dummy_data, id);
120 devlink_region_snapshot_id_put(devlink, id);
121 if (err) {
122 pr_err("Failed to create region snapshot\n");
123 kfree(dummy_data);
124 return err;
125 }
126
127 return count;
128}
129
130static const struct file_operations nsim_dev_take_snapshot_fops = {
131 .open = simple_open,
132 .write = nsim_dev_take_snapshot_write,
133 .llseek = generic_file_llseek,
134 .owner = THIS_MODULE,
135};
136
137static ssize_t nsim_dev_trap_fa_cookie_read(struct file *file,
138 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 unsigned int buf_len;
144 ssize_t ret;
145 char *buf;
146
147 spin_lock(&nsim_dev->fa_cookie_lock);
148 fa_cookie = nsim_dev->fa_cookie;
149 if (!fa_cookie) {
150 ret = -EINVAL;
151 goto errout;
152 }
153 buf_len = fa_cookie->cookie_len * 2;
154 buf = kmalloc(buf_len, GFP_ATOMIC);
155 if (!buf) {
156 ret = -ENOMEM;
157 goto errout;
158 }
159 bin2hex(buf, fa_cookie->cookie, fa_cookie->cookie_len);
160 spin_unlock(&nsim_dev->fa_cookie_lock);
161
162 ret = simple_read_from_buffer(data, count, ppos, buf, buf_len);
163
164 kfree(buf);
165 return ret;
166
167errout:
168 spin_unlock(&nsim_dev->fa_cookie_lock);
169 return ret;
170}
171
172static ssize_t nsim_dev_trap_fa_cookie_write(struct file *file,
173 const char __user *data,
174 size_t count, loff_t *ppos)
175{
176 struct nsim_dev *nsim_dev = file->private_data;
177 struct flow_action_cookie *fa_cookie;
178 size_t cookie_len;
179 ssize_t ret;
180 char *buf;
181
182 if (*ppos != 0)
183 return -EINVAL;
184 cookie_len = (count - 1) / 2;
185 if ((count - 1) % 2)
186 return -EINVAL;
187 buf = kmalloc(count, GFP_KERNEL | __GFP_NOWARN);
188 if (!buf)
189 return -ENOMEM;
190
191 ret = simple_write_to_buffer(buf, count, ppos, data, count);
192 if (ret < 0)
193 goto free_buf;
194
195 fa_cookie = kmalloc(sizeof(*fa_cookie) + cookie_len,
196 GFP_KERNEL | __GFP_NOWARN);
197 if (!fa_cookie) {
198 ret = -ENOMEM;
199 goto free_buf;
200 }
201
202 fa_cookie->cookie_len = cookie_len;
203 ret = hex2bin(fa_cookie->cookie, buf, cookie_len);
204 if (ret)
205 goto free_fa_cookie;
206 kfree(buf);
207
208 spin_lock(&nsim_dev->fa_cookie_lock);
209 kfree(nsim_dev->fa_cookie);
210 nsim_dev->fa_cookie = fa_cookie;
211 spin_unlock(&nsim_dev->fa_cookie_lock);
212
213 return count;
214
215free_fa_cookie:
216 kfree(fa_cookie);
217free_buf:
218 kfree(buf);
219 return ret;
220}
221
222static const struct file_operations nsim_dev_trap_fa_cookie_fops = {
223 .open = simple_open,
224 .read = nsim_dev_trap_fa_cookie_read,
225 .write = nsim_dev_trap_fa_cookie_write,
226 .llseek = generic_file_llseek,
227 .owner = THIS_MODULE,
228};
229
230static ssize_t nsim_bus_dev_max_vfs_read(struct file *file, char __user *data,
231 size_t count, loff_t *ppos)
232{
233 struct nsim_dev *nsim_dev = file->private_data;
234 char buf[11];
235 ssize_t len;
236
237 len = scnprintf(buf, sizeof(buf), "%u\n",
238 READ_ONCE(nsim_dev->nsim_bus_dev->max_vfs));
239
240 return simple_read_from_buffer(data, count, ppos, buf, len);
241}
242
243static ssize_t nsim_bus_dev_max_vfs_write(struct file *file,
244 const char __user *data,
245 size_t count, loff_t *ppos)
246{
247 struct nsim_vf_config *vfconfigs;
248 struct nsim_dev *nsim_dev;
249 char buf[10];
250 ssize_t ret;
251 u32 val;
252
253 if (*ppos != 0)
254 return 0;
255
256 if (count >= sizeof(buf))
257 return -ENOSPC;
258
259 ret = copy_from_user(buf, data, count);
260 if (ret)
261 return -EFAULT;
262 buf[count] = '\0';
263
264 ret = kstrtouint(buf, 10, &val);
265 if (ret)
266 return -EINVAL;
267
268
269 if (val > NSIM_DEV_VF_PORT_INDEX_MAX - NSIM_DEV_VF_PORT_INDEX_BASE)
270 return -ERANGE;
271
272 vfconfigs = kcalloc(val, sizeof(struct nsim_vf_config),
273 GFP_KERNEL | __GFP_NOWARN);
274 if (!vfconfigs)
275 return -ENOMEM;
276
277 nsim_dev = file->private_data;
278 devl_lock(priv_to_devlink(nsim_dev));
279
280 if (nsim_dev_get_vfs(nsim_dev)) {
281 ret = -EBUSY;
282 } else {
283 swap(nsim_dev->vfconfigs, vfconfigs);
284 WRITE_ONCE(nsim_dev->nsim_bus_dev->max_vfs, val);
285 *ppos += count;
286 ret = count;
287 }
288 devl_unlock(priv_to_devlink(nsim_dev));
289
290 kfree(vfconfigs);
291 return ret;
292}
293
294static const struct file_operations nsim_dev_max_vfs_fops = {
295 .open = simple_open,
296 .read = nsim_bus_dev_max_vfs_read,
297 .write = nsim_bus_dev_max_vfs_write,
298 .llseek = generic_file_llseek,
299 .owner = THIS_MODULE,
300};
301
302static int nsim_dev_debugfs_init(struct nsim_dev *nsim_dev)
303{
304 char dev_ddir_name[sizeof(DRV_NAME) + 10];
305 int err;
306
307 sprintf(dev_ddir_name, DRV_NAME "%u", nsim_dev->nsim_bus_dev->dev.id);
308 nsim_dev->ddir = debugfs_create_dir(dev_ddir_name, nsim_dev_ddir);
309 if (IS_ERR(nsim_dev->ddir))
310 return PTR_ERR(nsim_dev->ddir);
311 nsim_dev->ports_ddir = debugfs_create_dir("ports", nsim_dev->ddir);
312 if (IS_ERR(nsim_dev->ports_ddir))
313 return PTR_ERR(nsim_dev->ports_ddir);
314 debugfs_create_bool("fw_update_status", 0600, nsim_dev->ddir,
315 &nsim_dev->fw_update_status);
316 debugfs_create_u32("fw_update_overwrite_mask", 0600, nsim_dev->ddir,
317 &nsim_dev->fw_update_overwrite_mask);
318 debugfs_create_u32("max_macs", 0600, nsim_dev->ddir,
319 &nsim_dev->max_macs);
320 debugfs_create_bool("test1", 0600, nsim_dev->ddir,
321 &nsim_dev->test1);
322 nsim_dev->take_snapshot = debugfs_create_file("take_snapshot",
323 0200,
324 nsim_dev->ddir,
325 nsim_dev,
326 &nsim_dev_take_snapshot_fops);
327 debugfs_create_bool("dont_allow_reload", 0600, nsim_dev->ddir,
328 &nsim_dev->dont_allow_reload);
329 debugfs_create_bool("fail_reload", 0600, nsim_dev->ddir,
330 &nsim_dev->fail_reload);
331 debugfs_create_file("trap_flow_action_cookie", 0600, nsim_dev->ddir,
332 nsim_dev, &nsim_dev_trap_fa_cookie_fops);
333 debugfs_create_bool("fail_trap_group_set", 0600,
334 nsim_dev->ddir,
335 &nsim_dev->fail_trap_group_set);
336 debugfs_create_bool("fail_trap_policer_set", 0600,
337 nsim_dev->ddir,
338 &nsim_dev->fail_trap_policer_set);
339 debugfs_create_bool("fail_trap_policer_counter_get", 0600,
340 nsim_dev->ddir,
341 &nsim_dev->fail_trap_policer_counter_get);
342
343 debugfs_create_file("max_vfs", 0600, nsim_dev->ddir,
344 nsim_dev, &nsim_dev_max_vfs_fops);
345
346 nsim_dev->nodes_ddir = debugfs_create_dir("rate_nodes", nsim_dev->ddir);
347 if (IS_ERR(nsim_dev->nodes_ddir)) {
348 err = PTR_ERR(nsim_dev->nodes_ddir);
349 goto err_out;
350 }
351 debugfs_create_bool("fail_trap_drop_counter_get", 0600,
352 nsim_dev->ddir,
353 &nsim_dev->fail_trap_drop_counter_get);
354 nsim_udp_tunnels_debugfs_create(nsim_dev);
355 return 0;
356
357err_out:
358 debugfs_remove_recursive(nsim_dev->ports_ddir);
359 debugfs_remove_recursive(nsim_dev->ddir);
360 return err;
361}
362
363static void nsim_dev_debugfs_exit(struct nsim_dev *nsim_dev)
364{
365 debugfs_remove_recursive(nsim_dev->nodes_ddir);
366 debugfs_remove_recursive(nsim_dev->ports_ddir);
367 debugfs_remove_recursive(nsim_dev->ddir);
368}
369
370static ssize_t nsim_dev_rate_parent_read(struct file *file,
371 char __user *data,
372 size_t count, loff_t *ppos)
373{
374 char **name_ptr = file->private_data;
375 size_t len;
376
377 if (!*name_ptr)
378 return 0;
379
380 len = strlen(*name_ptr);
381 return simple_read_from_buffer(data, count, ppos, *name_ptr, len);
382}
383
384static const struct file_operations nsim_dev_rate_parent_fops = {
385 .open = simple_open,
386 .read = nsim_dev_rate_parent_read,
387 .llseek = generic_file_llseek,
388 .owner = THIS_MODULE,
389};
390
391static int nsim_dev_port_debugfs_init(struct nsim_dev *nsim_dev,
392 struct nsim_dev_port *nsim_dev_port)
393{
394 struct nsim_bus_dev *nsim_bus_dev = nsim_dev->nsim_bus_dev;
395 unsigned int port_index = nsim_dev_port->port_index;
396 char port_ddir_name[16];
397 char dev_link_name[32];
398
399 sprintf(port_ddir_name, "%u", port_index);
400 nsim_dev_port->ddir = debugfs_create_dir(port_ddir_name,
401 nsim_dev->ports_ddir);
402 if (IS_ERR(nsim_dev_port->ddir))
403 return PTR_ERR(nsim_dev_port->ddir);
404
405 sprintf(dev_link_name, "../../../" DRV_NAME "%u", nsim_bus_dev->dev.id);
406 if (nsim_dev_port_is_vf(nsim_dev_port)) {
407 unsigned int vf_id = nsim_dev_port_index_to_vf_index(port_index);
408
409 debugfs_create_u16("tx_share", 0400, nsim_dev_port->ddir,
410 &nsim_dev->vfconfigs[vf_id].min_tx_rate);
411 debugfs_create_u16("tx_max", 0400, nsim_dev_port->ddir,
412 &nsim_dev->vfconfigs[vf_id].max_tx_rate);
413 nsim_dev_port->rate_parent = debugfs_create_file("rate_parent",
414 0400,
415 nsim_dev_port->ddir,
416 &nsim_dev_port->parent_name,
417 &nsim_dev_rate_parent_fops);
418 }
419 debugfs_create_symlink("dev", nsim_dev_port->ddir, dev_link_name);
420
421 return 0;
422}
423
424static void nsim_dev_port_debugfs_exit(struct nsim_dev_port *nsim_dev_port)
425{
426 debugfs_remove_recursive(nsim_dev_port->ddir);
427}
428
429static int nsim_dev_resources_register(struct devlink *devlink)
430{
431 struct devlink_resource_size_params params = {
432 .size_max = (u64)-1,
433 .size_granularity = 1,
434 .unit = DEVLINK_RESOURCE_UNIT_ENTRY
435 };
436 int err;
437
438
439 err = devlink_resource_register(devlink, "IPv4", (u64)-1,
440 NSIM_RESOURCE_IPV4,
441 DEVLINK_RESOURCE_ID_PARENT_TOP,
442 ¶ms);
443 if (err) {
444 pr_err("Failed to register IPv4 top resource\n");
445 goto out;
446 }
447
448 err = devlink_resource_register(devlink, "fib", (u64)-1,
449 NSIM_RESOURCE_IPV4_FIB,
450 NSIM_RESOURCE_IPV4, ¶ms);
451 if (err) {
452 pr_err("Failed to register IPv4 FIB resource\n");
453 return err;
454 }
455
456 err = devlink_resource_register(devlink, "fib-rules", (u64)-1,
457 NSIM_RESOURCE_IPV4_FIB_RULES,
458 NSIM_RESOURCE_IPV4, ¶ms);
459 if (err) {
460 pr_err("Failed to register IPv4 FIB rules resource\n");
461 return err;
462 }
463
464
465 err = devlink_resource_register(devlink, "IPv6", (u64)-1,
466 NSIM_RESOURCE_IPV6,
467 DEVLINK_RESOURCE_ID_PARENT_TOP,
468 ¶ms);
469 if (err) {
470 pr_err("Failed to register IPv6 top resource\n");
471 goto out;
472 }
473
474 err = devlink_resource_register(devlink, "fib", (u64)-1,
475 NSIM_RESOURCE_IPV6_FIB,
476 NSIM_RESOURCE_IPV6, ¶ms);
477 if (err) {
478 pr_err("Failed to register IPv6 FIB resource\n");
479 return err;
480 }
481
482 err = devlink_resource_register(devlink, "fib-rules", (u64)-1,
483 NSIM_RESOURCE_IPV6_FIB_RULES,
484 NSIM_RESOURCE_IPV6, ¶ms);
485 if (err) {
486 pr_err("Failed to register IPv6 FIB rules resource\n");
487 return err;
488 }
489
490
491 err = devlink_resource_register(devlink, "nexthops", (u64)-1,
492 NSIM_RESOURCE_NEXTHOPS,
493 DEVLINK_RESOURCE_ID_PARENT_TOP,
494 ¶ms);
495
496out:
497 return err;
498}
499
500enum nsim_devlink_param_id {
501 NSIM_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX,
502 NSIM_DEVLINK_PARAM_ID_TEST1,
503};
504
505static const struct devlink_param nsim_devlink_params[] = {
506 DEVLINK_PARAM_GENERIC(MAX_MACS,
507 BIT(DEVLINK_PARAM_CMODE_DRIVERINIT),
508 NULL, NULL, NULL),
509 DEVLINK_PARAM_DRIVER(NSIM_DEVLINK_PARAM_ID_TEST1,
510 "test1", DEVLINK_PARAM_TYPE_BOOL,
511 BIT(DEVLINK_PARAM_CMODE_DRIVERINIT),
512 NULL, NULL, NULL),
513};
514
515static void nsim_devlink_set_params_init_values(struct nsim_dev *nsim_dev,
516 struct devlink *devlink)
517{
518 union devlink_param_value value;
519
520 value.vu32 = nsim_dev->max_macs;
521 devlink_param_driverinit_value_set(devlink,
522 DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
523 value);
524 value.vbool = nsim_dev->test1;
525 devlink_param_driverinit_value_set(devlink,
526 NSIM_DEVLINK_PARAM_ID_TEST1,
527 value);
528}
529
530static void nsim_devlink_param_load_driverinit_values(struct devlink *devlink)
531{
532 struct nsim_dev *nsim_dev = devlink_priv(devlink);
533 union devlink_param_value saved_value;
534 int err;
535
536 err = devlink_param_driverinit_value_get(devlink,
537 DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
538 &saved_value);
539 if (!err)
540 nsim_dev->max_macs = saved_value.vu32;
541 err = devlink_param_driverinit_value_get(devlink,
542 NSIM_DEVLINK_PARAM_ID_TEST1,
543 &saved_value);
544 if (!err)
545 nsim_dev->test1 = saved_value.vbool;
546}
547
548#define NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX 16
549
550static const struct devlink_region_ops dummy_region_ops = {
551 .name = "dummy",
552 .destructor = &kfree,
553 .snapshot = nsim_dev_take_snapshot,
554};
555
556static int nsim_dev_dummy_region_init(struct nsim_dev *nsim_dev,
557 struct devlink *devlink)
558{
559 nsim_dev->dummy_region =
560 devlink_region_create(devlink, &dummy_region_ops,
561 NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX,
562 NSIM_DEV_DUMMY_REGION_SIZE);
563 return PTR_ERR_OR_ZERO(nsim_dev->dummy_region);
564}
565
566static void nsim_dev_dummy_region_exit(struct nsim_dev *nsim_dev)
567{
568 devlink_region_destroy(nsim_dev->dummy_region);
569}
570
571static int
572__nsim_dev_port_add(struct nsim_dev *nsim_dev, enum nsim_dev_port_type type,
573 unsigned int port_index);
574static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port);
575
576static int nsim_esw_legacy_enable(struct nsim_dev *nsim_dev,
577 struct netlink_ext_ack *extack)
578{
579 struct devlink *devlink = priv_to_devlink(nsim_dev);
580 struct nsim_dev_port *nsim_dev_port, *tmp;
581
582 devl_rate_nodes_destroy(devlink);
583 list_for_each_entry_safe(nsim_dev_port, tmp, &nsim_dev->port_list, list)
584 if (nsim_dev_port_is_vf(nsim_dev_port))
585 __nsim_dev_port_del(nsim_dev_port);
586 nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_LEGACY;
587 return 0;
588}
589
590static int nsim_esw_switchdev_enable(struct nsim_dev *nsim_dev,
591 struct netlink_ext_ack *extack)
592{
593 struct nsim_dev_port *nsim_dev_port, *tmp;
594 int i, err;
595
596 for (i = 0; i < nsim_dev_get_vfs(nsim_dev); i++) {
597 err = __nsim_dev_port_add(nsim_dev, NSIM_DEV_PORT_TYPE_VF, i);
598 if (err) {
599 NL_SET_ERR_MSG_MOD(extack, "Failed to initialize VFs' netdevsim ports");
600 pr_err("Failed to initialize VF id=%d. %d.\n", i, err);
601 goto err_port_add_vfs;
602 }
603 }
604 nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_SWITCHDEV;
605 return 0;
606
607err_port_add_vfs:
608 list_for_each_entry_safe(nsim_dev_port, tmp, &nsim_dev->port_list, list)
609 if (nsim_dev_port_is_vf(nsim_dev_port))
610 __nsim_dev_port_del(nsim_dev_port);
611 return err;
612}
613
614static int nsim_devlink_eswitch_mode_set(struct devlink *devlink, u16 mode,
615 struct netlink_ext_ack *extack)
616{
617 struct nsim_dev *nsim_dev = devlink_priv(devlink);
618
619 if (mode == nsim_dev->esw_mode)
620 return 0;
621
622 if (mode == DEVLINK_ESWITCH_MODE_LEGACY)
623 return nsim_esw_legacy_enable(nsim_dev, extack);
624 if (mode == DEVLINK_ESWITCH_MODE_SWITCHDEV)
625 return nsim_esw_switchdev_enable(nsim_dev, extack);
626
627 return -EINVAL;
628}
629
630static int nsim_devlink_eswitch_mode_get(struct devlink *devlink, u16 *mode)
631{
632 struct nsim_dev *nsim_dev = devlink_priv(devlink);
633
634 *mode = nsim_dev->esw_mode;
635 return 0;
636}
637
638struct nsim_trap_item {
639 void *trap_ctx;
640 enum devlink_trap_action action;
641};
642
643struct nsim_trap_data {
644 struct delayed_work trap_report_dw;
645 struct nsim_trap_item *trap_items_arr;
646 u64 *trap_policers_cnt_arr;
647 u64 trap_pkt_cnt;
648 struct nsim_dev *nsim_dev;
649 spinlock_t trap_lock;
650};
651
652
653
654
655enum {
656 NSIM_TRAP_ID_BASE = DEVLINK_TRAP_GENERIC_ID_MAX,
657 NSIM_TRAP_ID_FID_MISS,
658};
659
660#define NSIM_TRAP_NAME_FID_MISS "fid_miss"
661
662#define NSIM_TRAP_METADATA DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT
663
664#define NSIM_TRAP_DROP(_id, _group_id) \
665 DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \
666 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \
667 NSIM_TRAP_METADATA)
668#define NSIM_TRAP_DROP_EXT(_id, _group_id, _metadata) \
669 DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \
670 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \
671 NSIM_TRAP_METADATA | (_metadata))
672#define NSIM_TRAP_EXCEPTION(_id, _group_id) \
673 DEVLINK_TRAP_GENERIC(EXCEPTION, TRAP, _id, \
674 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \
675 NSIM_TRAP_METADATA)
676#define NSIM_TRAP_CONTROL(_id, _group_id, _action) \
677 DEVLINK_TRAP_GENERIC(CONTROL, _action, _id, \
678 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \
679 NSIM_TRAP_METADATA)
680#define NSIM_TRAP_DRIVER_EXCEPTION(_id, _group_id) \
681 DEVLINK_TRAP_DRIVER(EXCEPTION, TRAP, NSIM_TRAP_ID_##_id, \
682 NSIM_TRAP_NAME_##_id, \
683 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \
684 NSIM_TRAP_METADATA)
685
686#define NSIM_DEV_TRAP_POLICER_MIN_RATE 1
687#define NSIM_DEV_TRAP_POLICER_MAX_RATE 8000
688#define NSIM_DEV_TRAP_POLICER_MIN_BURST 8
689#define NSIM_DEV_TRAP_POLICER_MAX_BURST 65536
690
691#define NSIM_TRAP_POLICER(_id, _rate, _burst) \
692 DEVLINK_TRAP_POLICER(_id, _rate, _burst, \
693 NSIM_DEV_TRAP_POLICER_MAX_RATE, \
694 NSIM_DEV_TRAP_POLICER_MIN_RATE, \
695 NSIM_DEV_TRAP_POLICER_MAX_BURST, \
696 NSIM_DEV_TRAP_POLICER_MIN_BURST)
697
698static const struct devlink_trap_policer nsim_trap_policers_arr[] = {
699 NSIM_TRAP_POLICER(1, 1000, 128),
700 NSIM_TRAP_POLICER(2, 2000, 256),
701 NSIM_TRAP_POLICER(3, 3000, 512),
702};
703
704static const struct devlink_trap_group nsim_trap_groups_arr[] = {
705 DEVLINK_TRAP_GROUP_GENERIC(L2_DROPS, 0),
706 DEVLINK_TRAP_GROUP_GENERIC(L3_DROPS, 1),
707 DEVLINK_TRAP_GROUP_GENERIC(L3_EXCEPTIONS, 1),
708 DEVLINK_TRAP_GROUP_GENERIC(BUFFER_DROPS, 2),
709 DEVLINK_TRAP_GROUP_GENERIC(ACL_DROPS, 3),
710 DEVLINK_TRAP_GROUP_GENERIC(MC_SNOOPING, 3),
711};
712
713static const struct devlink_trap nsim_traps_arr[] = {
714 NSIM_TRAP_DROP(SMAC_MC, L2_DROPS),
715 NSIM_TRAP_DROP(VLAN_TAG_MISMATCH, L2_DROPS),
716 NSIM_TRAP_DROP(INGRESS_VLAN_FILTER, L2_DROPS),
717 NSIM_TRAP_DROP(INGRESS_STP_FILTER, L2_DROPS),
718 NSIM_TRAP_DROP(EMPTY_TX_LIST, L2_DROPS),
719 NSIM_TRAP_DROP(PORT_LOOPBACK_FILTER, L2_DROPS),
720 NSIM_TRAP_DRIVER_EXCEPTION(FID_MISS, L2_DROPS),
721 NSIM_TRAP_DROP(BLACKHOLE_ROUTE, L3_DROPS),
722 NSIM_TRAP_EXCEPTION(TTL_ERROR, L3_EXCEPTIONS),
723 NSIM_TRAP_DROP(TAIL_DROP, BUFFER_DROPS),
724 NSIM_TRAP_DROP_EXT(INGRESS_FLOW_ACTION_DROP, ACL_DROPS,
725 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE),
726 NSIM_TRAP_DROP_EXT(EGRESS_FLOW_ACTION_DROP, ACL_DROPS,
727 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE),
728 NSIM_TRAP_CONTROL(IGMP_QUERY, MC_SNOOPING, MIRROR),
729 NSIM_TRAP_CONTROL(IGMP_V1_REPORT, MC_SNOOPING, TRAP),
730};
731
732#define NSIM_TRAP_L4_DATA_LEN 100
733
734static struct sk_buff *nsim_dev_trap_skb_build(void)
735{
736 int tot_len, data_len = NSIM_TRAP_L4_DATA_LEN;
737 struct sk_buff *skb;
738 struct udphdr *udph;
739 struct ethhdr *eth;
740 struct iphdr *iph;
741
742 skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
743 if (!skb)
744 return NULL;
745 tot_len = sizeof(struct iphdr) + sizeof(struct udphdr) + data_len;
746
747 skb_reset_mac_header(skb);
748 eth = skb_put(skb, sizeof(struct ethhdr));
749 eth_random_addr(eth->h_dest);
750 eth_random_addr(eth->h_source);
751 eth->h_proto = htons(ETH_P_IP);
752 skb->protocol = htons(ETH_P_IP);
753
754 skb_set_network_header(skb, skb->len);
755 iph = skb_put(skb, sizeof(struct iphdr));
756 iph->protocol = IPPROTO_UDP;
757 iph->saddr = in_aton("192.0.2.1");
758 iph->daddr = in_aton("198.51.100.1");
759 iph->version = 0x4;
760 iph->frag_off = 0;
761 iph->ihl = 0x5;
762 iph->tot_len = htons(tot_len);
763 iph->ttl = 100;
764 iph->check = 0;
765 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
766
767 skb_set_transport_header(skb, skb->len);
768 udph = skb_put_zero(skb, sizeof(struct udphdr) + data_len);
769 get_random_bytes(&udph->source, sizeof(u16));
770 get_random_bytes(&udph->dest, sizeof(u16));
771 udph->len = htons(sizeof(struct udphdr) + data_len);
772
773 return skb;
774}
775
776static void nsim_dev_trap_report(struct nsim_dev_port *nsim_dev_port)
777{
778 struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev;
779 struct devlink *devlink = priv_to_devlink(nsim_dev);
780 struct nsim_trap_data *nsim_trap_data;
781 int i;
782
783 nsim_trap_data = nsim_dev->trap_data;
784
785 spin_lock(&nsim_trap_data->trap_lock);
786 for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) {
787 struct flow_action_cookie *fa_cookie = NULL;
788 struct nsim_trap_item *nsim_trap_item;
789 struct sk_buff *skb;
790 bool has_fa_cookie;
791
792 has_fa_cookie = nsim_traps_arr[i].metadata_cap &
793 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE;
794
795 nsim_trap_item = &nsim_trap_data->trap_items_arr[i];
796 if (nsim_trap_item->action == DEVLINK_TRAP_ACTION_DROP)
797 continue;
798
799 skb = nsim_dev_trap_skb_build();
800 if (!skb)
801 continue;
802 skb->dev = nsim_dev_port->ns->netdev;
803
804
805
806
807
808
809
810 spin_lock_bh(&nsim_dev->fa_cookie_lock);
811 fa_cookie = has_fa_cookie ? nsim_dev->fa_cookie : NULL;
812 devlink_trap_report(devlink, skb, nsim_trap_item->trap_ctx,
813 &nsim_dev_port->devlink_port, fa_cookie);
814 spin_unlock_bh(&nsim_dev->fa_cookie_lock);
815 consume_skb(skb);
816 }
817 spin_unlock(&nsim_trap_data->trap_lock);
818}
819
820#define NSIM_TRAP_REPORT_INTERVAL_MS 100
821
822static void nsim_dev_trap_report_work(struct work_struct *work)
823{
824 struct nsim_trap_data *nsim_trap_data;
825 struct nsim_dev_port *nsim_dev_port;
826 struct nsim_dev *nsim_dev;
827
828 nsim_trap_data = container_of(work, struct nsim_trap_data,
829 trap_report_dw.work);
830 nsim_dev = nsim_trap_data->nsim_dev;
831
832
833
834
835 devl_lock(priv_to_devlink(nsim_dev));
836 list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list) {
837 if (!netif_running(nsim_dev_port->ns->netdev))
838 continue;
839
840 nsim_dev_trap_report(nsim_dev_port);
841 }
842 devl_unlock(priv_to_devlink(nsim_dev));
843
844 schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw,
845 msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS));
846}
847
848static int nsim_dev_traps_init(struct devlink *devlink)
849{
850 size_t policers_count = ARRAY_SIZE(nsim_trap_policers_arr);
851 struct nsim_dev *nsim_dev = devlink_priv(devlink);
852 struct nsim_trap_data *nsim_trap_data;
853 int err;
854
855 nsim_trap_data = kzalloc(sizeof(*nsim_trap_data), GFP_KERNEL);
856 if (!nsim_trap_data)
857 return -ENOMEM;
858
859 nsim_trap_data->trap_items_arr = kcalloc(ARRAY_SIZE(nsim_traps_arr),
860 sizeof(struct nsim_trap_item),
861 GFP_KERNEL);
862 if (!nsim_trap_data->trap_items_arr) {
863 err = -ENOMEM;
864 goto err_trap_data_free;
865 }
866
867 nsim_trap_data->trap_policers_cnt_arr = kcalloc(policers_count,
868 sizeof(u64),
869 GFP_KERNEL);
870 if (!nsim_trap_data->trap_policers_cnt_arr) {
871 err = -ENOMEM;
872 goto err_trap_items_free;
873 }
874
875
876
877
878
879 spin_lock_init(&nsim_trap_data->trap_lock);
880 nsim_trap_data->nsim_dev = nsim_dev;
881 nsim_dev->trap_data = nsim_trap_data;
882
883 err = devlink_trap_policers_register(devlink, nsim_trap_policers_arr,
884 policers_count);
885 if (err)
886 goto err_trap_policers_cnt_free;
887
888 err = devlink_trap_groups_register(devlink, nsim_trap_groups_arr,
889 ARRAY_SIZE(nsim_trap_groups_arr));
890 if (err)
891 goto err_trap_policers_unregister;
892
893 err = devlink_traps_register(devlink, nsim_traps_arr,
894 ARRAY_SIZE(nsim_traps_arr), NULL);
895 if (err)
896 goto err_trap_groups_unregister;
897
898 INIT_DELAYED_WORK(&nsim_dev->trap_data->trap_report_dw,
899 nsim_dev_trap_report_work);
900 schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw,
901 msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS));
902
903 return 0;
904
905err_trap_groups_unregister:
906 devlink_trap_groups_unregister(devlink, nsim_trap_groups_arr,
907 ARRAY_SIZE(nsim_trap_groups_arr));
908err_trap_policers_unregister:
909 devlink_trap_policers_unregister(devlink, nsim_trap_policers_arr,
910 ARRAY_SIZE(nsim_trap_policers_arr));
911err_trap_policers_cnt_free:
912 kfree(nsim_trap_data->trap_policers_cnt_arr);
913err_trap_items_free:
914 kfree(nsim_trap_data->trap_items_arr);
915err_trap_data_free:
916 kfree(nsim_trap_data);
917 return err;
918}
919
920static void nsim_dev_traps_exit(struct devlink *devlink)
921{
922 struct nsim_dev *nsim_dev = devlink_priv(devlink);
923
924
925 cancel_delayed_work_sync(&nsim_dev->trap_data->trap_report_dw);
926 devlink_traps_unregister(devlink, nsim_traps_arr,
927 ARRAY_SIZE(nsim_traps_arr));
928 devlink_trap_groups_unregister(devlink, nsim_trap_groups_arr,
929 ARRAY_SIZE(nsim_trap_groups_arr));
930 devlink_trap_policers_unregister(devlink, nsim_trap_policers_arr,
931 ARRAY_SIZE(nsim_trap_policers_arr));
932 kfree(nsim_dev->trap_data->trap_policers_cnt_arr);
933 kfree(nsim_dev->trap_data->trap_items_arr);
934 kfree(nsim_dev->trap_data);
935}
936
937static int nsim_dev_reload_create(struct nsim_dev *nsim_dev,
938 struct netlink_ext_ack *extack);
939static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev);
940
941static int nsim_dev_reload_down(struct devlink *devlink, bool netns_change,
942 enum devlink_reload_action action, enum devlink_reload_limit limit,
943 struct netlink_ext_ack *extack)
944{
945 struct nsim_dev *nsim_dev = devlink_priv(devlink);
946 struct nsim_bus_dev *nsim_bus_dev;
947
948 nsim_bus_dev = nsim_dev->nsim_bus_dev;
949 if (!mutex_trylock(&nsim_bus_dev->nsim_bus_reload_lock))
950 return -EOPNOTSUPP;
951
952 if (nsim_dev->dont_allow_reload) {
953
954
955
956 NL_SET_ERR_MSG_MOD(extack, "User forbid the reload for testing purposes");
957 mutex_unlock(&nsim_bus_dev->nsim_bus_reload_lock);
958 return -EOPNOTSUPP;
959 }
960 nsim_bus_dev->in_reload = true;
961
962 nsim_dev_reload_destroy(nsim_dev);
963 mutex_unlock(&nsim_bus_dev->nsim_bus_reload_lock);
964 return 0;
965}
966
967static int nsim_dev_reload_up(struct devlink *devlink, enum devlink_reload_action action,
968 enum devlink_reload_limit limit, u32 *actions_performed,
969 struct netlink_ext_ack *extack)
970{
971 struct nsim_dev *nsim_dev = devlink_priv(devlink);
972 struct nsim_bus_dev *nsim_bus_dev;
973 int ret;
974
975 nsim_bus_dev = nsim_dev->nsim_bus_dev;
976 mutex_lock(&nsim_bus_dev->nsim_bus_reload_lock);
977 nsim_bus_dev->in_reload = false;
978
979 if (nsim_dev->fail_reload) {
980
981
982
983 NL_SET_ERR_MSG_MOD(extack, "User setup the reload to fail for testing purposes");
984 mutex_unlock(&nsim_bus_dev->nsim_bus_reload_lock);
985 return -EINVAL;
986 }
987
988 *actions_performed = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT);
989 ret = nsim_dev_reload_create(nsim_dev, extack);
990 mutex_unlock(&nsim_bus_dev->nsim_bus_reload_lock);
991 return ret;
992}
993
994static int nsim_dev_info_get(struct devlink *devlink,
995 struct devlink_info_req *req,
996 struct netlink_ext_ack *extack)
997{
998 return devlink_info_driver_name_put(req, DRV_NAME);
999}
1000
1001#define NSIM_DEV_FLASH_SIZE 500000
1002#define NSIM_DEV_FLASH_CHUNK_SIZE 1000
1003#define NSIM_DEV_FLASH_CHUNK_TIME_MS 10
1004
1005static int nsim_dev_flash_update(struct devlink *devlink,
1006 struct devlink_flash_update_params *params,
1007 struct netlink_ext_ack *extack)
1008{
1009 struct nsim_dev *nsim_dev = devlink_priv(devlink);
1010 int i;
1011
1012 if ((params->overwrite_mask & ~nsim_dev->fw_update_overwrite_mask) != 0)
1013 return -EOPNOTSUPP;
1014
1015 if (nsim_dev->fw_update_status) {
1016 devlink_flash_update_status_notify(devlink,
1017 "Preparing to flash",
1018 params->component, 0, 0);
1019 }
1020
1021 for (i = 0; i < NSIM_DEV_FLASH_SIZE / NSIM_DEV_FLASH_CHUNK_SIZE; i++) {
1022 if (nsim_dev->fw_update_status)
1023 devlink_flash_update_status_notify(devlink, "Flashing",
1024 params->component,
1025 i * NSIM_DEV_FLASH_CHUNK_SIZE,
1026 NSIM_DEV_FLASH_SIZE);
1027 msleep(NSIM_DEV_FLASH_CHUNK_TIME_MS);
1028 }
1029
1030 if (nsim_dev->fw_update_status) {
1031 devlink_flash_update_status_notify(devlink, "Flashing",
1032 params->component,
1033 NSIM_DEV_FLASH_SIZE,
1034 NSIM_DEV_FLASH_SIZE);
1035 devlink_flash_update_timeout_notify(devlink, "Flash select",
1036 params->component, 81);
1037 devlink_flash_update_status_notify(devlink, "Flashing done",
1038 params->component, 0, 0);
1039 }
1040
1041 return 0;
1042}
1043
1044static struct nsim_trap_item *
1045nsim_dev_trap_item_lookup(struct nsim_dev *nsim_dev, u16 trap_id)
1046{
1047 struct nsim_trap_data *nsim_trap_data = nsim_dev->trap_data;
1048 int i;
1049
1050 for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) {
1051 if (nsim_traps_arr[i].id == trap_id)
1052 return &nsim_trap_data->trap_items_arr[i];
1053 }
1054
1055 return NULL;
1056}
1057
1058static int nsim_dev_devlink_trap_init(struct devlink *devlink,
1059 const struct devlink_trap *trap,
1060 void *trap_ctx)
1061{
1062 struct nsim_dev *nsim_dev = devlink_priv(devlink);
1063 struct nsim_trap_item *nsim_trap_item;
1064
1065 nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id);
1066 if (WARN_ON(!nsim_trap_item))
1067 return -ENOENT;
1068
1069 nsim_trap_item->trap_ctx = trap_ctx;
1070 nsim_trap_item->action = trap->init_action;
1071
1072 return 0;
1073}
1074
1075static int
1076nsim_dev_devlink_trap_action_set(struct devlink *devlink,
1077 const struct devlink_trap *trap,
1078 enum devlink_trap_action action,
1079 struct netlink_ext_ack *extack)
1080{
1081 struct nsim_dev *nsim_dev = devlink_priv(devlink);
1082 struct nsim_trap_item *nsim_trap_item;
1083
1084 nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id);
1085 if (WARN_ON(!nsim_trap_item))
1086 return -ENOENT;
1087
1088 spin_lock(&nsim_dev->trap_data->trap_lock);
1089 nsim_trap_item->action = action;
1090 spin_unlock(&nsim_dev->trap_data->trap_lock);
1091
1092 return 0;
1093}
1094
1095static int
1096nsim_dev_devlink_trap_group_set(struct devlink *devlink,
1097 const struct devlink_trap_group *group,
1098 const struct devlink_trap_policer *policer,
1099 struct netlink_ext_ack *extack)
1100{
1101 struct nsim_dev *nsim_dev = devlink_priv(devlink);
1102
1103 if (nsim_dev->fail_trap_group_set)
1104 return -EINVAL;
1105
1106 return 0;
1107}
1108
1109static int
1110nsim_dev_devlink_trap_policer_set(struct devlink *devlink,
1111 const struct devlink_trap_policer *policer,
1112 u64 rate, u64 burst,
1113 struct netlink_ext_ack *extack)
1114{
1115 struct nsim_dev *nsim_dev = devlink_priv(devlink);
1116
1117 if (nsim_dev->fail_trap_policer_set) {
1118 NL_SET_ERR_MSG_MOD(extack, "User setup the operation to fail for testing purposes");
1119 return -EINVAL;
1120 }
1121
1122 return 0;
1123}
1124
1125static int
1126nsim_dev_devlink_trap_policer_counter_get(struct devlink *devlink,
1127 const struct devlink_trap_policer *policer,
1128 u64 *p_drops)
1129{
1130 struct nsim_dev *nsim_dev = devlink_priv(devlink);
1131 u64 *cnt;
1132
1133 if (nsim_dev->fail_trap_policer_counter_get)
1134 return -EINVAL;
1135
1136 cnt = &nsim_dev->trap_data->trap_policers_cnt_arr[policer->id - 1];
1137 *p_drops = (*cnt)++;
1138
1139 return 0;
1140}
1141
1142#define NSIM_LINK_SPEED_MAX 5000
1143#define NSIM_LINK_SPEED_UNIT 125000
1144
1145
1146
1147
1148static int nsim_rate_bytes_to_units(char *name, u64 *rate, struct netlink_ext_ack *extack)
1149{
1150 u64 val;
1151 u32 rem;
1152
1153 val = div_u64_rem(*rate, NSIM_LINK_SPEED_UNIT, &rem);
1154 if (rem) {
1155 pr_err("%s rate value %lluBps not in link speed units of 1Mbps.\n",
1156 name, *rate);
1157 NL_SET_ERR_MSG_MOD(extack, "TX rate value not in link speed units of 1Mbps.");
1158 return -EINVAL;
1159 }
1160
1161 if (val > NSIM_LINK_SPEED_MAX) {
1162 pr_err("%s rate value %lluMbps exceed link maximum speed 5000Mbps.\n",
1163 name, val);
1164 NL_SET_ERR_MSG_MOD(extack, "TX rate value exceed link maximum speed 5000Mbps.");
1165 return -EINVAL;
1166 }
1167 *rate = val;
1168 return 0;
1169}
1170
1171static int nsim_leaf_tx_share_set(struct devlink_rate *devlink_rate, void *priv,
1172 u64 tx_share, struct netlink_ext_ack *extack)
1173{
1174 struct nsim_dev_port *nsim_dev_port = priv;
1175 struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev;
1176 int vf_id = nsim_dev_port_index_to_vf_index(nsim_dev_port->port_index);
1177 int err;
1178
1179 err = nsim_rate_bytes_to_units("tx_share", &tx_share, extack);
1180 if (err)
1181 return err;
1182
1183 nsim_dev->vfconfigs[vf_id].min_tx_rate = tx_share;
1184 return 0;
1185}
1186
1187static int nsim_leaf_tx_max_set(struct devlink_rate *devlink_rate, void *priv,
1188 u64 tx_max, struct netlink_ext_ack *extack)
1189{
1190 struct nsim_dev_port *nsim_dev_port = priv;
1191 struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev;
1192 int vf_id = nsim_dev_port_index_to_vf_index(nsim_dev_port->port_index);
1193 int err;
1194
1195 err = nsim_rate_bytes_to_units("tx_max", &tx_max, extack);
1196 if (err)
1197 return err;
1198
1199 nsim_dev->vfconfigs[vf_id].max_tx_rate = tx_max;
1200 return 0;
1201}
1202
1203struct nsim_rate_node {
1204 struct dentry *ddir;
1205 struct dentry *rate_parent;
1206 char *parent_name;
1207 u16 tx_share;
1208 u16 tx_max;
1209};
1210
1211static int nsim_node_tx_share_set(struct devlink_rate *devlink_rate, void *priv,
1212 u64 tx_share, struct netlink_ext_ack *extack)
1213{
1214 struct nsim_rate_node *nsim_node = priv;
1215 int err;
1216
1217 err = nsim_rate_bytes_to_units("tx_share", &tx_share, extack);
1218 if (err)
1219 return err;
1220
1221 nsim_node->tx_share = tx_share;
1222 return 0;
1223}
1224
1225static int nsim_node_tx_max_set(struct devlink_rate *devlink_rate, void *priv,
1226 u64 tx_max, struct netlink_ext_ack *extack)
1227{
1228 struct nsim_rate_node *nsim_node = priv;
1229 int err;
1230
1231 err = nsim_rate_bytes_to_units("tx_max", &tx_max, extack);
1232 if (err)
1233 return err;
1234
1235 nsim_node->tx_max = tx_max;
1236 return 0;
1237}
1238
1239static int nsim_rate_node_new(struct devlink_rate *node, void **priv,
1240 struct netlink_ext_ack *extack)
1241{
1242 struct nsim_dev *nsim_dev = devlink_priv(node->devlink);
1243 struct nsim_rate_node *nsim_node;
1244
1245 if (!nsim_esw_mode_is_switchdev(nsim_dev)) {
1246 NL_SET_ERR_MSG_MOD(extack, "Node creation allowed only in switchdev mode.");
1247 return -EOPNOTSUPP;
1248 }
1249
1250 nsim_node = kzalloc(sizeof(*nsim_node), GFP_KERNEL);
1251 if (!nsim_node)
1252 return -ENOMEM;
1253
1254 nsim_node->ddir = debugfs_create_dir(node->name, nsim_dev->nodes_ddir);
1255
1256 debugfs_create_u16("tx_share", 0400, nsim_node->ddir, &nsim_node->tx_share);
1257 debugfs_create_u16("tx_max", 0400, nsim_node->ddir, &nsim_node->tx_max);
1258 nsim_node->rate_parent = debugfs_create_file("rate_parent", 0400,
1259 nsim_node->ddir,
1260 &nsim_node->parent_name,
1261 &nsim_dev_rate_parent_fops);
1262
1263 *priv = nsim_node;
1264 return 0;
1265}
1266
1267static int nsim_rate_node_del(struct devlink_rate *node, void *priv,
1268 struct netlink_ext_ack *extack)
1269{
1270 struct nsim_rate_node *nsim_node = priv;
1271
1272 debugfs_remove(nsim_node->rate_parent);
1273 debugfs_remove_recursive(nsim_node->ddir);
1274 kfree(nsim_node);
1275 return 0;
1276}
1277
1278static int nsim_rate_leaf_parent_set(struct devlink_rate *child,
1279 struct devlink_rate *parent,
1280 void *priv_child, void *priv_parent,
1281 struct netlink_ext_ack *extack)
1282{
1283 struct nsim_dev_port *nsim_dev_port = priv_child;
1284
1285 if (parent)
1286 nsim_dev_port->parent_name = parent->name;
1287 else
1288 nsim_dev_port->parent_name = NULL;
1289 return 0;
1290}
1291
1292static int nsim_rate_node_parent_set(struct devlink_rate *child,
1293 struct devlink_rate *parent,
1294 void *priv_child, void *priv_parent,
1295 struct netlink_ext_ack *extack)
1296{
1297 struct nsim_rate_node *nsim_node = priv_child;
1298
1299 if (parent)
1300 nsim_node->parent_name = parent->name;
1301 else
1302 nsim_node->parent_name = NULL;
1303 return 0;
1304}
1305
1306static int
1307nsim_dev_devlink_trap_drop_counter_get(struct devlink *devlink,
1308 const struct devlink_trap *trap,
1309 u64 *p_drops)
1310{
1311 struct nsim_dev *nsim_dev = devlink_priv(devlink);
1312 u64 *cnt;
1313
1314 if (nsim_dev->fail_trap_drop_counter_get)
1315 return -EINVAL;
1316
1317 cnt = &nsim_dev->trap_data->trap_pkt_cnt;
1318 *p_drops = (*cnt)++;
1319
1320 return 0;
1321}
1322
1323static const struct devlink_ops nsim_dev_devlink_ops = {
1324 .eswitch_mode_set = nsim_devlink_eswitch_mode_set,
1325 .eswitch_mode_get = nsim_devlink_eswitch_mode_get,
1326 .supported_flash_update_params = DEVLINK_SUPPORT_FLASH_UPDATE_COMPONENT |
1327 DEVLINK_SUPPORT_FLASH_UPDATE_OVERWRITE_MASK,
1328 .reload_actions = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT),
1329 .reload_down = nsim_dev_reload_down,
1330 .reload_up = nsim_dev_reload_up,
1331 .info_get = nsim_dev_info_get,
1332 .flash_update = nsim_dev_flash_update,
1333 .trap_init = nsim_dev_devlink_trap_init,
1334 .trap_action_set = nsim_dev_devlink_trap_action_set,
1335 .trap_group_set = nsim_dev_devlink_trap_group_set,
1336 .trap_policer_set = nsim_dev_devlink_trap_policer_set,
1337 .trap_policer_counter_get = nsim_dev_devlink_trap_policer_counter_get,
1338 .rate_leaf_tx_share_set = nsim_leaf_tx_share_set,
1339 .rate_leaf_tx_max_set = nsim_leaf_tx_max_set,
1340 .rate_node_tx_share_set = nsim_node_tx_share_set,
1341 .rate_node_tx_max_set = nsim_node_tx_max_set,
1342 .rate_node_new = nsim_rate_node_new,
1343 .rate_node_del = nsim_rate_node_del,
1344 .rate_leaf_parent_set = nsim_rate_leaf_parent_set,
1345 .rate_node_parent_set = nsim_rate_node_parent_set,
1346 .trap_drop_counter_get = nsim_dev_devlink_trap_drop_counter_get,
1347};
1348
1349#define NSIM_DEV_MAX_MACS_DEFAULT 32
1350#define NSIM_DEV_TEST1_DEFAULT true
1351
1352static int __nsim_dev_port_add(struct nsim_dev *nsim_dev, enum nsim_dev_port_type type,
1353 unsigned int port_index)
1354{
1355 struct devlink_port_attrs attrs = {};
1356 struct nsim_dev_port *nsim_dev_port;
1357 struct devlink_port *devlink_port;
1358 int err;
1359
1360 if (type == NSIM_DEV_PORT_TYPE_VF && !nsim_dev_get_vfs(nsim_dev))
1361 return -EINVAL;
1362
1363 nsim_dev_port = kzalloc(sizeof(*nsim_dev_port), GFP_KERNEL);
1364 if (!nsim_dev_port)
1365 return -ENOMEM;
1366 nsim_dev_port->port_index = nsim_dev_port_index(type, port_index);
1367 nsim_dev_port->port_type = type;
1368
1369 devlink_port = &nsim_dev_port->devlink_port;
1370 if (nsim_dev_port_is_pf(nsim_dev_port)) {
1371 attrs.flavour = DEVLINK_PORT_FLAVOUR_PHYSICAL;
1372 attrs.phys.port_number = port_index + 1;
1373 } else {
1374 attrs.flavour = DEVLINK_PORT_FLAVOUR_PCI_VF;
1375 attrs.pci_vf.pf = 0;
1376 attrs.pci_vf.vf = port_index;
1377 }
1378 memcpy(attrs.switch_id.id, nsim_dev->switch_id.id, nsim_dev->switch_id.id_len);
1379 attrs.switch_id.id_len = nsim_dev->switch_id.id_len;
1380 devlink_port_attrs_set(devlink_port, &attrs);
1381 err = devl_port_register(priv_to_devlink(nsim_dev), devlink_port,
1382 nsim_dev_port->port_index);
1383 if (err)
1384 goto err_port_free;
1385
1386 err = nsim_dev_port_debugfs_init(nsim_dev, nsim_dev_port);
1387 if (err)
1388 goto err_dl_port_unregister;
1389
1390 nsim_dev_port->ns = nsim_create(nsim_dev, nsim_dev_port);
1391 if (IS_ERR(nsim_dev_port->ns)) {
1392 err = PTR_ERR(nsim_dev_port->ns);
1393 goto err_port_debugfs_exit;
1394 }
1395
1396 if (nsim_dev_port_is_vf(nsim_dev_port)) {
1397 err = devl_rate_leaf_create(&nsim_dev_port->devlink_port,
1398 nsim_dev_port);
1399 if (err)
1400 goto err_nsim_destroy;
1401 }
1402
1403 devlink_port_type_eth_set(devlink_port, nsim_dev_port->ns->netdev);
1404 list_add(&nsim_dev_port->list, &nsim_dev->port_list);
1405
1406 return 0;
1407
1408err_nsim_destroy:
1409 nsim_destroy(nsim_dev_port->ns);
1410err_port_debugfs_exit:
1411 nsim_dev_port_debugfs_exit(nsim_dev_port);
1412err_dl_port_unregister:
1413 devl_port_unregister(devlink_port);
1414err_port_free:
1415 kfree(nsim_dev_port);
1416 return err;
1417}
1418
1419static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port)
1420{
1421 struct devlink_port *devlink_port = &nsim_dev_port->devlink_port;
1422
1423 list_del(&nsim_dev_port->list);
1424 if (nsim_dev_port_is_vf(nsim_dev_port))
1425 devl_rate_leaf_destroy(&nsim_dev_port->devlink_port);
1426 devlink_port_type_clear(devlink_port);
1427 nsim_destroy(nsim_dev_port->ns);
1428 nsim_dev_port_debugfs_exit(nsim_dev_port);
1429 devl_port_unregister(devlink_port);
1430 kfree(nsim_dev_port);
1431}
1432
1433static void nsim_dev_port_del_all(struct nsim_dev *nsim_dev)
1434{
1435 struct nsim_dev_port *nsim_dev_port, *tmp;
1436
1437 devl_lock(priv_to_devlink(nsim_dev));
1438 list_for_each_entry_safe(nsim_dev_port, tmp,
1439 &nsim_dev->port_list, list)
1440 __nsim_dev_port_del(nsim_dev_port);
1441 devl_unlock(priv_to_devlink(nsim_dev));
1442}
1443
1444static int nsim_dev_port_add_all(struct nsim_dev *nsim_dev,
1445 unsigned int port_count)
1446{
1447 int i, err;
1448
1449 for (i = 0; i < port_count; i++) {
1450 devl_lock(priv_to_devlink(nsim_dev));
1451 err = __nsim_dev_port_add(nsim_dev, NSIM_DEV_PORT_TYPE_PF, i);
1452 devl_unlock(priv_to_devlink(nsim_dev));
1453 if (err)
1454 goto err_port_del_all;
1455 }
1456 return 0;
1457
1458err_port_del_all:
1459 nsim_dev_port_del_all(nsim_dev);
1460 return err;
1461}
1462
1463static int nsim_dev_reload_create(struct nsim_dev *nsim_dev,
1464 struct netlink_ext_ack *extack)
1465{
1466 struct nsim_bus_dev *nsim_bus_dev = nsim_dev->nsim_bus_dev;
1467 struct devlink *devlink;
1468 int err;
1469
1470 devlink = priv_to_devlink(nsim_dev);
1471 nsim_dev = devlink_priv(devlink);
1472 INIT_LIST_HEAD(&nsim_dev->port_list);
1473 nsim_dev->fw_update_status = true;
1474 nsim_dev->fw_update_overwrite_mask = 0;
1475
1476 nsim_devlink_param_load_driverinit_values(devlink);
1477
1478 err = nsim_dev_dummy_region_init(nsim_dev, devlink);
1479 if (err)
1480 return err;
1481
1482 err = nsim_dev_traps_init(devlink);
1483 if (err)
1484 goto err_dummy_region_exit;
1485
1486 nsim_dev->fib_data = nsim_fib_create(devlink, extack);
1487 if (IS_ERR(nsim_dev->fib_data)) {
1488 err = PTR_ERR(nsim_dev->fib_data);
1489 goto err_traps_exit;
1490 }
1491
1492 err = nsim_dev_health_init(nsim_dev, devlink);
1493 if (err)
1494 goto err_fib_destroy;
1495
1496 err = nsim_dev_psample_init(nsim_dev);
1497 if (err)
1498 goto err_health_exit;
1499
1500 err = nsim_dev_hwstats_init(nsim_dev);
1501 if (err)
1502 goto err_psample_exit;
1503
1504 err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count);
1505 if (err)
1506 goto err_hwstats_exit;
1507
1508 nsim_dev->take_snapshot = debugfs_create_file("take_snapshot",
1509 0200,
1510 nsim_dev->ddir,
1511 nsim_dev,
1512 &nsim_dev_take_snapshot_fops);
1513 return 0;
1514
1515err_hwstats_exit:
1516 nsim_dev_hwstats_exit(nsim_dev);
1517err_psample_exit:
1518 nsim_dev_psample_exit(nsim_dev);
1519err_health_exit:
1520 nsim_dev_health_exit(nsim_dev);
1521err_fib_destroy:
1522 nsim_fib_destroy(devlink, nsim_dev->fib_data);
1523err_traps_exit:
1524 nsim_dev_traps_exit(devlink);
1525err_dummy_region_exit:
1526 nsim_dev_dummy_region_exit(nsim_dev);
1527 return err;
1528}
1529
1530int nsim_drv_probe(struct nsim_bus_dev *nsim_bus_dev)
1531{
1532 struct nsim_dev *nsim_dev;
1533 struct devlink *devlink;
1534 int err;
1535
1536 devlink = devlink_alloc_ns(&nsim_dev_devlink_ops, sizeof(*nsim_dev),
1537 nsim_bus_dev->initial_net, &nsim_bus_dev->dev);
1538 if (!devlink)
1539 return -ENOMEM;
1540 nsim_dev = devlink_priv(devlink);
1541 nsim_dev->nsim_bus_dev = nsim_bus_dev;
1542 nsim_dev->switch_id.id_len = sizeof(nsim_dev->switch_id.id);
1543 get_random_bytes(nsim_dev->switch_id.id, nsim_dev->switch_id.id_len);
1544 INIT_LIST_HEAD(&nsim_dev->port_list);
1545 nsim_dev->fw_update_status = true;
1546 nsim_dev->fw_update_overwrite_mask = 0;
1547 nsim_dev->max_macs = NSIM_DEV_MAX_MACS_DEFAULT;
1548 nsim_dev->test1 = NSIM_DEV_TEST1_DEFAULT;
1549 spin_lock_init(&nsim_dev->fa_cookie_lock);
1550
1551 dev_set_drvdata(&nsim_bus_dev->dev, nsim_dev);
1552
1553 nsim_dev->vfconfigs = kcalloc(nsim_bus_dev->max_vfs,
1554 sizeof(struct nsim_vf_config),
1555 GFP_KERNEL | __GFP_NOWARN);
1556 if (!nsim_dev->vfconfigs) {
1557 err = -ENOMEM;
1558 goto err_devlink_free;
1559 }
1560
1561 err = nsim_dev_resources_register(devlink);
1562 if (err)
1563 goto err_vfc_free;
1564
1565 err = devlink_params_register(devlink, nsim_devlink_params,
1566 ARRAY_SIZE(nsim_devlink_params));
1567 if (err)
1568 goto err_dl_unregister;
1569 nsim_devlink_set_params_init_values(nsim_dev, devlink);
1570
1571 err = nsim_dev_dummy_region_init(nsim_dev, devlink);
1572 if (err)
1573 goto err_params_unregister;
1574
1575 err = nsim_dev_traps_init(devlink);
1576 if (err)
1577 goto err_dummy_region_exit;
1578
1579 err = nsim_dev_debugfs_init(nsim_dev);
1580 if (err)
1581 goto err_traps_exit;
1582
1583 nsim_dev->fib_data = nsim_fib_create(devlink, NULL);
1584 if (IS_ERR(nsim_dev->fib_data)) {
1585 err = PTR_ERR(nsim_dev->fib_data);
1586 goto err_debugfs_exit;
1587 }
1588
1589 err = nsim_dev_health_init(nsim_dev, devlink);
1590 if (err)
1591 goto err_fib_destroy;
1592
1593 err = nsim_bpf_dev_init(nsim_dev);
1594 if (err)
1595 goto err_health_exit;
1596
1597 err = nsim_dev_psample_init(nsim_dev);
1598 if (err)
1599 goto err_bpf_dev_exit;
1600
1601 err = nsim_dev_hwstats_init(nsim_dev);
1602 if (err)
1603 goto err_psample_exit;
1604
1605 err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count);
1606 if (err)
1607 goto err_hwstats_exit;
1608
1609 nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_LEGACY;
1610 devlink_set_features(devlink, DEVLINK_F_RELOAD);
1611 devlink_register(devlink);
1612 return 0;
1613
1614err_hwstats_exit:
1615 nsim_dev_hwstats_exit(nsim_dev);
1616err_psample_exit:
1617 nsim_dev_psample_exit(nsim_dev);
1618err_bpf_dev_exit:
1619 nsim_bpf_dev_exit(nsim_dev);
1620err_health_exit:
1621 nsim_dev_health_exit(nsim_dev);
1622err_fib_destroy:
1623 nsim_fib_destroy(devlink, nsim_dev->fib_data);
1624err_debugfs_exit:
1625 nsim_dev_debugfs_exit(nsim_dev);
1626err_traps_exit:
1627 nsim_dev_traps_exit(devlink);
1628err_dummy_region_exit:
1629 nsim_dev_dummy_region_exit(nsim_dev);
1630err_params_unregister:
1631 devlink_params_unregister(devlink, nsim_devlink_params,
1632 ARRAY_SIZE(nsim_devlink_params));
1633err_dl_unregister:
1634 devlink_resources_unregister(devlink);
1635err_vfc_free:
1636 kfree(nsim_dev->vfconfigs);
1637err_devlink_free:
1638 devlink_free(devlink);
1639 dev_set_drvdata(&nsim_bus_dev->dev, NULL);
1640 return err;
1641}
1642
1643static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev)
1644{
1645 struct devlink *devlink = priv_to_devlink(nsim_dev);
1646
1647 if (devlink_is_reload_failed(devlink))
1648 return;
1649 debugfs_remove(nsim_dev->take_snapshot);
1650
1651 devl_lock(devlink);
1652 if (nsim_dev_get_vfs(nsim_dev)) {
1653 nsim_bus_dev_set_vfs(nsim_dev->nsim_bus_dev, 0);
1654 if (nsim_esw_mode_is_switchdev(nsim_dev))
1655 nsim_esw_legacy_enable(nsim_dev, NULL);
1656 }
1657 devl_unlock(devlink);
1658
1659 nsim_dev_port_del_all(nsim_dev);
1660 nsim_dev_hwstats_exit(nsim_dev);
1661 nsim_dev_psample_exit(nsim_dev);
1662 nsim_dev_health_exit(nsim_dev);
1663 nsim_fib_destroy(devlink, nsim_dev->fib_data);
1664 nsim_dev_traps_exit(devlink);
1665 nsim_dev_dummy_region_exit(nsim_dev);
1666}
1667
1668void nsim_drv_remove(struct nsim_bus_dev *nsim_bus_dev)
1669{
1670 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
1671 struct devlink *devlink = priv_to_devlink(nsim_dev);
1672
1673 devlink_unregister(devlink);
1674 nsim_dev_reload_destroy(nsim_dev);
1675
1676 nsim_bpf_dev_exit(nsim_dev);
1677 nsim_dev_debugfs_exit(nsim_dev);
1678 devlink_params_unregister(devlink, nsim_devlink_params,
1679 ARRAY_SIZE(nsim_devlink_params));
1680 devlink_resources_unregister(devlink);
1681 kfree(nsim_dev->vfconfigs);
1682 devlink_free(devlink);
1683 dev_set_drvdata(&nsim_bus_dev->dev, NULL);
1684}
1685
1686static struct nsim_dev_port *
1687__nsim_dev_port_lookup(struct nsim_dev *nsim_dev, enum nsim_dev_port_type type,
1688 unsigned int port_index)
1689{
1690 struct nsim_dev_port *nsim_dev_port;
1691
1692 port_index = nsim_dev_port_index(type, port_index);
1693 list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list)
1694 if (nsim_dev_port->port_index == port_index)
1695 return nsim_dev_port;
1696 return NULL;
1697}
1698
1699int nsim_drv_port_add(struct nsim_bus_dev *nsim_bus_dev, enum nsim_dev_port_type type,
1700 unsigned int port_index)
1701{
1702 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
1703 int err;
1704
1705 devl_lock(priv_to_devlink(nsim_dev));
1706 if (__nsim_dev_port_lookup(nsim_dev, type, port_index))
1707 err = -EEXIST;
1708 else
1709 err = __nsim_dev_port_add(nsim_dev, type, port_index);
1710 devl_unlock(priv_to_devlink(nsim_dev));
1711 return err;
1712}
1713
1714int nsim_drv_port_del(struct nsim_bus_dev *nsim_bus_dev, enum nsim_dev_port_type type,
1715 unsigned int port_index)
1716{
1717 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
1718 struct nsim_dev_port *nsim_dev_port;
1719 int err = 0;
1720
1721 devl_lock(priv_to_devlink(nsim_dev));
1722 nsim_dev_port = __nsim_dev_port_lookup(nsim_dev, type, port_index);
1723 if (!nsim_dev_port)
1724 err = -ENOENT;
1725 else
1726 __nsim_dev_port_del(nsim_dev_port);
1727 devl_unlock(priv_to_devlink(nsim_dev));
1728 return err;
1729}
1730
1731int nsim_drv_configure_vfs(struct nsim_bus_dev *nsim_bus_dev,
1732 unsigned int num_vfs)
1733{
1734 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
1735 struct devlink *devlink = priv_to_devlink(nsim_dev);
1736 int ret = 0;
1737
1738 devl_lock(devlink);
1739 if (nsim_bus_dev->num_vfs == num_vfs)
1740 goto exit_unlock;
1741 if (nsim_bus_dev->num_vfs && num_vfs) {
1742 ret = -EBUSY;
1743 goto exit_unlock;
1744 }
1745 if (nsim_bus_dev->max_vfs < num_vfs) {
1746 ret = -ENOMEM;
1747 goto exit_unlock;
1748 }
1749
1750 nsim_bus_dev_set_vfs(nsim_bus_dev, num_vfs);
1751 if (nsim_esw_mode_is_switchdev(nsim_dev)) {
1752 if (num_vfs) {
1753 ret = nsim_esw_switchdev_enable(nsim_dev, NULL);
1754 if (ret) {
1755 nsim_bus_dev_set_vfs(nsim_bus_dev, 0);
1756 goto exit_unlock;
1757 }
1758 } else {
1759 nsim_esw_legacy_enable(nsim_dev, NULL);
1760 }
1761 }
1762
1763exit_unlock:
1764 devl_unlock(devlink);
1765
1766 return ret;
1767}
1768
1769int nsim_dev_init(void)
1770{
1771 nsim_dev_ddir = debugfs_create_dir(DRV_NAME, NULL);
1772 return PTR_ERR_OR_ZERO(nsim_dev_ddir);
1773}
1774
1775void nsim_dev_exit(void)
1776{
1777 debugfs_remove_recursive(nsim_dev_ddir);
1778}
1779
