projects/linux·blob 9e795d94 · refs

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1/*
2 * Copyright (c) 2018 Cumulus Networks. All rights reserved.
3 * Copyright (c) 2018 David Ahern <[email protected]>
4 * Copyright (c) 2019 Mellanox Technologies. All rights reserved.
5 *
6 * This software is licensed under the GNU General License Version 2,
7 * June 1991 as shown in the file COPYING in the top-level directory of this
8 * source tree.
9 *
10 * THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS"
11 * WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
12 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
13 * FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE
14 * OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME
15 * THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
16 */
17
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
59#define NSIM_DEV_DUMMY_REGION_SIZE (1024 * 32)
60
61static int
62nsim_dev_take_snapshot(struct devlink *devlink,
63 const struct devlink_region_ops *ops,
64 struct netlink_ext_ack *extack,
65 u8 **data)
66{
67 void *dummy_data;
68
69 dummy_data = kmalloc(NSIM_DEV_DUMMY_REGION_SIZE, GFP_KERNEL);
70 if (!dummy_data)
71 return -ENOMEM;
72
73 get_random_bytes(dummy_data, NSIM_DEV_DUMMY_REGION_SIZE);
74
75 *data = dummy_data;
76
77 return 0;
78}
79
80static ssize_t nsim_dev_take_snapshot_write(struct file *file,
81 const char __user *data,
82 size_t count, loff_t *ppos)
83{
84 struct nsim_dev *nsim_dev = file->private_data;
85 struct devlink *devlink;
86 u8 *dummy_data;
87 int err;
88 u32 id;
89
90 devlink = priv_to_devlink(nsim_dev);
91
92 err = nsim_dev_take_snapshot(devlink, NULL, NULL, &dummy_data);
93 if (err)
94 return err;
95
96 err = devlink_region_snapshot_id_get(devlink, &id);
97 if (err) {
98 pr_err("Failed to get snapshot id\n");
99 kfree(dummy_data);
100 return err;
101 }
102 err = devlink_region_snapshot_create(nsim_dev->dummy_region,
103 dummy_data, id);
104 devlink_region_snapshot_id_put(devlink, id);
105 if (err) {
106 pr_err("Failed to create region snapshot\n");
107 kfree(dummy_data);
108 return err;
109 }
110
111 return count;
112}
113
114static const struct file_operations nsim_dev_take_snapshot_fops = {
115 .open = simple_open,
116 .write = nsim_dev_take_snapshot_write,
117 .llseek = generic_file_llseek,
118 .owner = THIS_MODULE,
119};
120
121static ssize_t nsim_dev_trap_fa_cookie_read(struct file *file,
122 char __user *data,
123 size_t count, loff_t *ppos)
124{
125 struct nsim_dev *nsim_dev = file->private_data;
126 struct flow_action_cookie *fa_cookie;
127 unsigned int buf_len;
128 ssize_t ret;
129 char *buf;
130
131 spin_lock(&nsim_dev->fa_cookie_lock);
132 fa_cookie = nsim_dev->fa_cookie;
133 if (!fa_cookie) {
134 ret = -EINVAL;
135 goto errout;
136 }
137 buf_len = fa_cookie->cookie_len * 2;
138 buf = kmalloc(buf_len, GFP_ATOMIC);
139 if (!buf) {
140 ret = -ENOMEM;
141 goto errout;
142 }
143 bin2hex(buf, fa_cookie->cookie, fa_cookie->cookie_len);
144 spin_unlock(&nsim_dev->fa_cookie_lock);
145
146 ret = simple_read_from_buffer(data, count, ppos, buf, buf_len);
147
148 kfree(buf);
149 return ret;
150
151errout:
152 spin_unlock(&nsim_dev->fa_cookie_lock);
153 return ret;
154}
155
156static ssize_t nsim_dev_trap_fa_cookie_write(struct file *file,
157 const char __user *data,
158 size_t count, loff_t *ppos)
159{
160 struct nsim_dev *nsim_dev = file->private_data;
161 struct flow_action_cookie *fa_cookie;
162 size_t cookie_len;
163 ssize_t ret;
164 char *buf;
165
166 if (*ppos != 0)
167 return -EINVAL;
168 cookie_len = (count - 1) / 2;
169 if ((count - 1) % 2)
170 return -EINVAL;
171 buf = kmalloc(count, GFP_KERNEL | __GFP_NOWARN);
172 if (!buf)
173 return -ENOMEM;
174
175 ret = simple_write_to_buffer(buf, count, ppos, data, count);
176 if (ret < 0)
177 goto free_buf;
178
179 fa_cookie = kmalloc(sizeof(*fa_cookie) + cookie_len,
180 GFP_KERNEL | __GFP_NOWARN);
181 if (!fa_cookie) {
182 ret = -ENOMEM;
183 goto free_buf;
184 }
185
186 fa_cookie->cookie_len = cookie_len;
187 ret = hex2bin(fa_cookie->cookie, buf, cookie_len);
188 if (ret)
189 goto free_fa_cookie;
190 kfree(buf);
191
192 spin_lock(&nsim_dev->fa_cookie_lock);
193 kfree(nsim_dev->fa_cookie);
194 nsim_dev->fa_cookie = fa_cookie;
195 spin_unlock(&nsim_dev->fa_cookie_lock);
196
197 return count;
198
199free_fa_cookie:
200 kfree(fa_cookie);
201free_buf:
202 kfree(buf);
203 return ret;
204}
205
206static const struct file_operations nsim_dev_trap_fa_cookie_fops = {
207 .open = simple_open,
208 .read = nsim_dev_trap_fa_cookie_read,
209 .write = nsim_dev_trap_fa_cookie_write,
210 .llseek = generic_file_llseek,
211 .owner = THIS_MODULE,
212};
213
214static const struct file_operations nsim_dev_max_vfs_fops = {
215 .open = simple_open,
216 .read = nsim_bus_dev_max_vfs_read,
217 .write = nsim_bus_dev_max_vfs_write,
218 .llseek = generic_file_llseek,
219 .owner = THIS_MODULE,
220};
221
222static int nsim_dev_debugfs_init(struct nsim_dev *nsim_dev)
223{
224 char dev_ddir_name[sizeof(DRV_NAME) + 10];
225 int err;
226
227 sprintf(dev_ddir_name, DRV_NAME "%u", nsim_dev->nsim_bus_dev->dev.id);
228 nsim_dev->ddir = debugfs_create_dir(dev_ddir_name, nsim_dev_ddir);
229 if (IS_ERR(nsim_dev->ddir))
230 return PTR_ERR(nsim_dev->ddir);
231 nsim_dev->ports_ddir = debugfs_create_dir("ports", nsim_dev->ddir);
232 if (IS_ERR(nsim_dev->ports_ddir))
233 return PTR_ERR(nsim_dev->ports_ddir);
234 debugfs_create_bool("fw_update_status", 0600, nsim_dev->ddir,
235 &nsim_dev->fw_update_status);
236 debugfs_create_u32("fw_update_overwrite_mask", 0600, nsim_dev->ddir,
237 &nsim_dev->fw_update_overwrite_mask);
238 debugfs_create_u32("max_macs", 0600, nsim_dev->ddir,
239 &nsim_dev->max_macs);
240 debugfs_create_bool("test1", 0600, nsim_dev->ddir,
241 &nsim_dev->test1);
242 nsim_dev->take_snapshot = debugfs_create_file("take_snapshot",
243 0200,
244 nsim_dev->ddir,
245 nsim_dev,
246 &nsim_dev_take_snapshot_fops);
247 debugfs_create_bool("dont_allow_reload", 0600, nsim_dev->ddir,
248 &nsim_dev->dont_allow_reload);
249 debugfs_create_bool("fail_reload", 0600, nsim_dev->ddir,
250 &nsim_dev->fail_reload);
251 debugfs_create_file("trap_flow_action_cookie", 0600, nsim_dev->ddir,
252 nsim_dev, &nsim_dev_trap_fa_cookie_fops);
253 debugfs_create_bool("fail_trap_group_set", 0600,
254 nsim_dev->ddir,
255 &nsim_dev->fail_trap_group_set);
256 debugfs_create_bool("fail_trap_policer_set", 0600,
257 nsim_dev->ddir,
258 &nsim_dev->fail_trap_policer_set);
259 debugfs_create_bool("fail_trap_policer_counter_get", 0600,
260 nsim_dev->ddir,
261 &nsim_dev->fail_trap_policer_counter_get);
262 nsim_dev->max_vfs = debugfs_create_file("max_vfs",
263 0600,
264 nsim_dev->ddir,
265 nsim_dev->nsim_bus_dev,
266 &nsim_dev_max_vfs_fops);
267 nsim_dev->nodes_ddir = debugfs_create_dir("rate_nodes", nsim_dev->ddir);
268 if (IS_ERR(nsim_dev->nodes_ddir)) {
269 err = PTR_ERR(nsim_dev->nodes_ddir);
270 goto err_out;
271 }
272 debugfs_create_bool("fail_trap_drop_counter_get", 0600,
273 nsim_dev->ddir,
274 &nsim_dev->fail_trap_drop_counter_get);
275 nsim_udp_tunnels_debugfs_create(nsim_dev);
276 return 0;
277
278err_out:
279 debugfs_remove_recursive(nsim_dev->ports_ddir);
280 debugfs_remove_recursive(nsim_dev->ddir);
281 return err;
282}
283
284static void nsim_dev_debugfs_exit(struct nsim_dev *nsim_dev)
285{
286 debugfs_remove_recursive(nsim_dev->nodes_ddir);
287 debugfs_remove_recursive(nsim_dev->ports_ddir);
288 debugfs_remove_recursive(nsim_dev->ddir);
289}
290
291static ssize_t nsim_dev_rate_parent_read(struct file *file,
292 char __user *data,
293 size_t count, loff_t *ppos)
294{
295 char **name_ptr = file->private_data;
296 size_t len;
297
298 if (!*name_ptr)
299 return 0;
300
301 len = strlen(*name_ptr);
302 return simple_read_from_buffer(data, count, ppos, *name_ptr, len);
303}
304
305static const struct file_operations nsim_dev_rate_parent_fops = {
306 .open = simple_open,
307 .read = nsim_dev_rate_parent_read,
308 .llseek = generic_file_llseek,
309 .owner = THIS_MODULE,
310};
311
312static int nsim_dev_port_debugfs_init(struct nsim_dev *nsim_dev,
313 struct nsim_dev_port *nsim_dev_port)
314{
315 struct nsim_bus_dev *nsim_bus_dev = nsim_dev->nsim_bus_dev;
316 unsigned int port_index = nsim_dev_port->port_index;
317 char port_ddir_name[16];
318 char dev_link_name[32];
319
320 sprintf(port_ddir_name, "%u", port_index);
321 nsim_dev_port->ddir = debugfs_create_dir(port_ddir_name,
322 nsim_dev->ports_ddir);
323 if (IS_ERR(nsim_dev_port->ddir))
324 return PTR_ERR(nsim_dev_port->ddir);
325
326 sprintf(dev_link_name, "../../../" DRV_NAME "%u", nsim_bus_dev->dev.id);
327 if (nsim_dev_port_is_vf(nsim_dev_port)) {
328 unsigned int vf_id = nsim_dev_port_index_to_vf_index(port_index);
329
330 debugfs_create_u16("tx_share", 0400, nsim_dev_port->ddir,
331 &nsim_bus_dev->vfconfigs[vf_id].min_tx_rate);
332 debugfs_create_u16("tx_max", 0400, nsim_dev_port->ddir,
333 &nsim_bus_dev->vfconfigs[vf_id].max_tx_rate);
334 nsim_dev_port->rate_parent = debugfs_create_file("rate_parent",
335 0400,
336 nsim_dev_port->ddir,
337 &nsim_dev_port->parent_name,
338 &nsim_dev_rate_parent_fops);
339 }
340 debugfs_create_symlink("dev", nsim_dev_port->ddir, dev_link_name);
341
342 return 0;
343}
344
345static void nsim_dev_port_debugfs_exit(struct nsim_dev_port *nsim_dev_port)
346{
347 debugfs_remove_recursive(nsim_dev_port->ddir);
348}
349
350static int nsim_dev_resources_register(struct devlink *devlink)
351{
352 struct devlink_resource_size_params params = {
353 .size_max = (u64)-1,
354 .size_granularity = 1,
355 .unit = DEVLINK_RESOURCE_UNIT_ENTRY
356 };
357 int err;
358
359 /* Resources for IPv4 */
360 err = devlink_resource_register(devlink, "IPv4", (u64)-1,
361 NSIM_RESOURCE_IPV4,
362 DEVLINK_RESOURCE_ID_PARENT_TOP,
363 &params);
364 if (err) {
365 pr_err("Failed to register IPv4 top resource\n");
366 goto out;
367 }
368
369 err = devlink_resource_register(devlink, "fib", (u64)-1,
370 NSIM_RESOURCE_IPV4_FIB,
371 NSIM_RESOURCE_IPV4, &params);
372 if (err) {
373 pr_err("Failed to register IPv4 FIB resource\n");
374 return err;
375 }
376
377 err = devlink_resource_register(devlink, "fib-rules", (u64)-1,
378 NSIM_RESOURCE_IPV4_FIB_RULES,
379 NSIM_RESOURCE_IPV4, &params);
380 if (err) {
381 pr_err("Failed to register IPv4 FIB rules resource\n");
382 return err;
383 }
384
385 /* Resources for IPv6 */
386 err = devlink_resource_register(devlink, "IPv6", (u64)-1,
387 NSIM_RESOURCE_IPV6,
388 DEVLINK_RESOURCE_ID_PARENT_TOP,
389 &params);
390 if (err) {
391 pr_err("Failed to register IPv6 top resource\n");
392 goto out;
393 }
394
395 err = devlink_resource_register(devlink, "fib", (u64)-1,
396 NSIM_RESOURCE_IPV6_FIB,
397 NSIM_RESOURCE_IPV6, &params);
398 if (err) {
399 pr_err("Failed to register IPv6 FIB resource\n");
400 return err;
401 }
402
403 err = devlink_resource_register(devlink, "fib-rules", (u64)-1,
404 NSIM_RESOURCE_IPV6_FIB_RULES,
405 NSIM_RESOURCE_IPV6, &params);
406 if (err) {
407 pr_err("Failed to register IPv6 FIB rules resource\n");
408 return err;
409 }
410
411 /* Resources for nexthops */
412 err = devlink_resource_register(devlink, "nexthops", (u64)-1,
413 NSIM_RESOURCE_NEXTHOPS,
414 DEVLINK_RESOURCE_ID_PARENT_TOP,
415 &params);
416
417out:
418 return err;
419}
420
421enum nsim_devlink_param_id {
422 NSIM_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX,
423 NSIM_DEVLINK_PARAM_ID_TEST1,
424};
425
426static const struct devlink_param nsim_devlink_params[] = {
427 DEVLINK_PARAM_GENERIC(MAX_MACS,
428 BIT(DEVLINK_PARAM_CMODE_DRIVERINIT),
429 NULL, NULL, NULL),
430 DEVLINK_PARAM_DRIVER(NSIM_DEVLINK_PARAM_ID_TEST1,
431 "test1", DEVLINK_PARAM_TYPE_BOOL,
432 BIT(DEVLINK_PARAM_CMODE_DRIVERINIT),
433 NULL, NULL, NULL),
434};
435
436static void nsim_devlink_set_params_init_values(struct nsim_dev *nsim_dev,
437 struct devlink *devlink)
438{
439 union devlink_param_value value;
440
441 value.vu32 = nsim_dev->max_macs;
442 devlink_param_driverinit_value_set(devlink,
443 DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
444 value);
445 value.vbool = nsim_dev->test1;
446 devlink_param_driverinit_value_set(devlink,
447 NSIM_DEVLINK_PARAM_ID_TEST1,
448 value);
449}
450
451static void nsim_devlink_param_load_driverinit_values(struct devlink *devlink)
452{
453 struct nsim_dev *nsim_dev = devlink_priv(devlink);
454 union devlink_param_value saved_value;
455 int err;
456
457 err = devlink_param_driverinit_value_get(devlink,
458 DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
459 &saved_value);
460 if (!err)
461 nsim_dev->max_macs = saved_value.vu32;
462 err = devlink_param_driverinit_value_get(devlink,
463 NSIM_DEVLINK_PARAM_ID_TEST1,
464 &saved_value);
465 if (!err)
466 nsim_dev->test1 = saved_value.vbool;
467}
468
469#define NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX 16
470
471static const struct devlink_region_ops dummy_region_ops = {
472 .name = "dummy",
473 .destructor = &kfree,
474 .snapshot = nsim_dev_take_snapshot,
475};
476
477static int nsim_dev_dummy_region_init(struct nsim_dev *nsim_dev,
478 struct devlink *devlink)
479{
480 nsim_dev->dummy_region =
481 devlink_region_create(devlink, &dummy_region_ops,
482 NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX,
483 NSIM_DEV_DUMMY_REGION_SIZE);
484 return PTR_ERR_OR_ZERO(nsim_dev->dummy_region);
485}
486
487static void nsim_dev_dummy_region_exit(struct nsim_dev *nsim_dev)
488{
489 devlink_region_destroy(nsim_dev->dummy_region);
490}
491
492static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port);
493int nsim_esw_legacy_enable(struct nsim_dev *nsim_dev, struct netlink_ext_ack *extack)
494{
495 struct devlink *devlink = priv_to_devlink(nsim_dev);
496 struct nsim_dev_port *nsim_dev_port, *tmp;
497
498 devlink_rate_nodes_destroy(devlink);
499 mutex_lock(&nsim_dev->port_list_lock);
500 list_for_each_entry_safe(nsim_dev_port, tmp, &nsim_dev->port_list, list)
501 if (nsim_dev_port_is_vf(nsim_dev_port))
502 __nsim_dev_port_del(nsim_dev_port);
503 mutex_unlock(&nsim_dev->port_list_lock);
504 nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_LEGACY;
505 return 0;
506}
507
508int nsim_esw_switchdev_enable(struct nsim_dev *nsim_dev, struct netlink_ext_ack *extack)
509{
510 struct nsim_bus_dev *nsim_bus_dev = nsim_dev->nsim_bus_dev;
511 int i, err;
512
513 for (i = 0; i < nsim_bus_dev->num_vfs; i++) {
514 err = nsim_dev_port_add(nsim_bus_dev, NSIM_DEV_PORT_TYPE_VF, i);
515 if (err) {
516 NL_SET_ERR_MSG_MOD(extack, "Failed to initialize VFs' netdevsim ports");
517 pr_err("Failed to initialize VF id=%d. %d.\n", i, err);
518 goto err_port_add_vfs;
519 }
520 }
521 nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_SWITCHDEV;
522 return 0;
523
524err_port_add_vfs:
525 for (i--; i >= 0; i--)
526 nsim_dev_port_del(nsim_bus_dev, NSIM_DEV_PORT_TYPE_VF, i);
527 return err;
528}
529
530static int nsim_devlink_eswitch_mode_set(struct devlink *devlink, u16 mode,
531 struct netlink_ext_ack *extack)
532{
533 struct nsim_dev *nsim_dev = devlink_priv(devlink);
534 int err = 0;
535
536 mutex_lock(&nsim_dev->nsim_bus_dev->vfs_lock);
537 if (mode == nsim_dev->esw_mode)
538 goto unlock;
539
540 if (mode == DEVLINK_ESWITCH_MODE_LEGACY)
541 err = nsim_esw_legacy_enable(nsim_dev, extack);
542 else if (mode == DEVLINK_ESWITCH_MODE_SWITCHDEV)
543 err = nsim_esw_switchdev_enable(nsim_dev, extack);
544 else
545 err = -EINVAL;
546
547unlock:
548 mutex_unlock(&nsim_dev->nsim_bus_dev->vfs_lock);
549 return err;
550}
551
552static int nsim_devlink_eswitch_mode_get(struct devlink *devlink, u16 *mode)
553{
554 struct nsim_dev *nsim_dev = devlink_priv(devlink);
555
556 *mode = nsim_dev->esw_mode;
557 return 0;
558}
559
560struct nsim_trap_item {
561 void *trap_ctx;
562 enum devlink_trap_action action;
563};
564
565struct nsim_trap_data {
566 struct delayed_work trap_report_dw;
567 struct nsim_trap_item *trap_items_arr;
568 u64 *trap_policers_cnt_arr;
569 u64 trap_pkt_cnt;
570 struct nsim_dev *nsim_dev;
571 spinlock_t trap_lock; /* Protects trap_items_arr */
572};
573
574/* All driver-specific traps must be documented in
575 * Documentation/networking/devlink/netdevsim.rst
576 */
577enum {
578 NSIM_TRAP_ID_BASE = DEVLINK_TRAP_GENERIC_ID_MAX,
579 NSIM_TRAP_ID_FID_MISS,
580};
581
582#define NSIM_TRAP_NAME_FID_MISS "fid_miss"
583
584#define NSIM_TRAP_METADATA DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT
585
586#define NSIM_TRAP_DROP(_id, _group_id) \
587 DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \
588 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \
589 NSIM_TRAP_METADATA)
590#define NSIM_TRAP_DROP_EXT(_id, _group_id, _metadata) \
591 DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \
592 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \
593 NSIM_TRAP_METADATA | (_metadata))
594#define NSIM_TRAP_EXCEPTION(_id, _group_id) \
595 DEVLINK_TRAP_GENERIC(EXCEPTION, TRAP, _id, \
596 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \
597 NSIM_TRAP_METADATA)
598#define NSIM_TRAP_CONTROL(_id, _group_id, _action) \
599 DEVLINK_TRAP_GENERIC(CONTROL, _action, _id, \
600 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \
601 NSIM_TRAP_METADATA)
602#define NSIM_TRAP_DRIVER_EXCEPTION(_id, _group_id) \
603 DEVLINK_TRAP_DRIVER(EXCEPTION, TRAP, NSIM_TRAP_ID_##_id, \
604 NSIM_TRAP_NAME_##_id, \
605 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \
606 NSIM_TRAP_METADATA)
607
608#define NSIM_DEV_TRAP_POLICER_MIN_RATE 1
609#define NSIM_DEV_TRAP_POLICER_MAX_RATE 8000
610#define NSIM_DEV_TRAP_POLICER_MIN_BURST 8
611#define NSIM_DEV_TRAP_POLICER_MAX_BURST 65536
612
613#define NSIM_TRAP_POLICER(_id, _rate, _burst) \
614 DEVLINK_TRAP_POLICER(_id, _rate, _burst, \
615 NSIM_DEV_TRAP_POLICER_MAX_RATE, \
616 NSIM_DEV_TRAP_POLICER_MIN_RATE, \
617 NSIM_DEV_TRAP_POLICER_MAX_BURST, \
618 NSIM_DEV_TRAP_POLICER_MIN_BURST)
619
620static const struct devlink_trap_policer nsim_trap_policers_arr[] = {
621 NSIM_TRAP_POLICER(1, 1000, 128),
622 NSIM_TRAP_POLICER(2, 2000, 256),
623 NSIM_TRAP_POLICER(3, 3000, 512),
624};
625
626static const struct devlink_trap_group nsim_trap_groups_arr[] = {
627 DEVLINK_TRAP_GROUP_GENERIC(L2_DROPS, 0),
628 DEVLINK_TRAP_GROUP_GENERIC(L3_DROPS, 1),
629 DEVLINK_TRAP_GROUP_GENERIC(L3_EXCEPTIONS, 1),
630 DEVLINK_TRAP_GROUP_GENERIC(BUFFER_DROPS, 2),
631 DEVLINK_TRAP_GROUP_GENERIC(ACL_DROPS, 3),
632 DEVLINK_TRAP_GROUP_GENERIC(MC_SNOOPING, 3),
633};
634
635static const struct devlink_trap nsim_traps_arr[] = {
636 NSIM_TRAP_DROP(SMAC_MC, L2_DROPS),
637 NSIM_TRAP_DROP(VLAN_TAG_MISMATCH, L2_DROPS),
638 NSIM_TRAP_DROP(INGRESS_VLAN_FILTER, L2_DROPS),
639 NSIM_TRAP_DROP(INGRESS_STP_FILTER, L2_DROPS),
640 NSIM_TRAP_DROP(EMPTY_TX_LIST, L2_DROPS),
641 NSIM_TRAP_DROP(PORT_LOOPBACK_FILTER, L2_DROPS),
642 NSIM_TRAP_DRIVER_EXCEPTION(FID_MISS, L2_DROPS),
643 NSIM_TRAP_DROP(BLACKHOLE_ROUTE, L3_DROPS),
644 NSIM_TRAP_EXCEPTION(TTL_ERROR, L3_EXCEPTIONS),
645 NSIM_TRAP_DROP(TAIL_DROP, BUFFER_DROPS),
646 NSIM_TRAP_DROP_EXT(INGRESS_FLOW_ACTION_DROP, ACL_DROPS,
647 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE),
648 NSIM_TRAP_DROP_EXT(EGRESS_FLOW_ACTION_DROP, ACL_DROPS,
649 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE),
650 NSIM_TRAP_CONTROL(IGMP_QUERY, MC_SNOOPING, MIRROR),
651 NSIM_TRAP_CONTROL(IGMP_V1_REPORT, MC_SNOOPING, TRAP),
652};
653
654#define NSIM_TRAP_L4_DATA_LEN 100
655
656static struct sk_buff *nsim_dev_trap_skb_build(void)
657{
658 int tot_len, data_len = NSIM_TRAP_L4_DATA_LEN;
659 struct sk_buff *skb;
660 struct udphdr *udph;
661 struct ethhdr *eth;
662 struct iphdr *iph;
663
664 skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
665 if (!skb)
666 return NULL;
667 tot_len = sizeof(struct iphdr) + sizeof(struct udphdr) + data_len;
668
669 skb_reset_mac_header(skb);
670 eth = skb_put(skb, sizeof(struct ethhdr));
671 eth_random_addr(eth->h_dest);
672 eth_random_addr(eth->h_source);
673 eth->h_proto = htons(ETH_P_IP);
674 skb->protocol = htons(ETH_P_IP);
675
676 skb_set_network_header(skb, skb->len);
677 iph = skb_put(skb, sizeof(struct iphdr));
678 iph->protocol = IPPROTO_UDP;
679 iph->saddr = in_aton("192.0.2.1");
680 iph->daddr = in_aton("198.51.100.1");
681 iph->version = 0x4;
682 iph->frag_off = 0;
683 iph->ihl = 0x5;
684 iph->tot_len = htons(tot_len);
685 iph->ttl = 100;
686 iph->check = 0;
687 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
688
689 skb_set_transport_header(skb, skb->len);
690 udph = skb_put_zero(skb, sizeof(struct udphdr) + data_len);
691 get_random_bytes(&udph->source, sizeof(u16));
692 get_random_bytes(&udph->dest, sizeof(u16));
693 udph->len = htons(sizeof(struct udphdr) + data_len);
694
695 return skb;
696}
697
698static void nsim_dev_trap_report(struct nsim_dev_port *nsim_dev_port)
699{
700 struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev;
701 struct devlink *devlink = priv_to_devlink(nsim_dev);
702 struct nsim_trap_data *nsim_trap_data;
703 int i;
704
705 nsim_trap_data = nsim_dev->trap_data;
706
707 spin_lock(&nsim_trap_data->trap_lock);
708 for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) {
709 struct flow_action_cookie *fa_cookie = NULL;
710 struct nsim_trap_item *nsim_trap_item;
711 struct sk_buff *skb;
712 bool has_fa_cookie;
713
714 has_fa_cookie = nsim_traps_arr[i].metadata_cap &
715 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE;
716
717 nsim_trap_item = &nsim_trap_data->trap_items_arr[i];
718 if (nsim_trap_item->action == DEVLINK_TRAP_ACTION_DROP)
719 continue;
720
721 skb = nsim_dev_trap_skb_build();
722 if (!skb)
723 continue;
724 skb->dev = nsim_dev_port->ns->netdev;
725
726 /* Trapped packets are usually passed to devlink in softIRQ,
727 * but in this case they are generated in a workqueue. Disable
728 * softIRQs to prevent lockdep from complaining about
729 * "incosistent lock state".
730 */
731
732 spin_lock_bh(&nsim_dev->fa_cookie_lock);
733 fa_cookie = has_fa_cookie ? nsim_dev->fa_cookie : NULL;
734 devlink_trap_report(devlink, skb, nsim_trap_item->trap_ctx,
735 &nsim_dev_port->devlink_port, fa_cookie);
736 spin_unlock_bh(&nsim_dev->fa_cookie_lock);
737 consume_skb(skb);
738 }
739 spin_unlock(&nsim_trap_data->trap_lock);
740}
741
742#define NSIM_TRAP_REPORT_INTERVAL_MS 100
743
744static void nsim_dev_trap_report_work(struct work_struct *work)
745{
746 struct nsim_trap_data *nsim_trap_data;
747 struct nsim_dev_port *nsim_dev_port;
748 struct nsim_dev *nsim_dev;
749
750 nsim_trap_data = container_of(work, struct nsim_trap_data,
751 trap_report_dw.work);
752 nsim_dev = nsim_trap_data->nsim_dev;
753
754 /* For each running port and enabled packet trap, generate a UDP
755 * packet with a random 5-tuple and report it.
756 */
757 mutex_lock(&nsim_dev->port_list_lock);
758 list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list) {
759 if (!netif_running(nsim_dev_port->ns->netdev))
760 continue;
761
762 nsim_dev_trap_report(nsim_dev_port);
763 }
764 mutex_unlock(&nsim_dev->port_list_lock);
765
766 schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw,
767 msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS));
768}
769
770static int nsim_dev_traps_init(struct devlink *devlink)
771{
772 size_t policers_count = ARRAY_SIZE(nsim_trap_policers_arr);
773 struct nsim_dev *nsim_dev = devlink_priv(devlink);
774 struct nsim_trap_data *nsim_trap_data;
775 int err;
776
777 nsim_trap_data = kzalloc(sizeof(*nsim_trap_data), GFP_KERNEL);
778 if (!nsim_trap_data)
779 return -ENOMEM;
780
781 nsim_trap_data->trap_items_arr = kcalloc(ARRAY_SIZE(nsim_traps_arr),
782 sizeof(struct nsim_trap_item),
783 GFP_KERNEL);
784 if (!nsim_trap_data->trap_items_arr) {
785 err = -ENOMEM;
786 goto err_trap_data_free;
787 }
788
789 nsim_trap_data->trap_policers_cnt_arr = kcalloc(policers_count,
790 sizeof(u64),
791 GFP_KERNEL);
792 if (!nsim_trap_data->trap_policers_cnt_arr) {
793 err = -ENOMEM;
794 goto err_trap_items_free;
795 }
796
797 /* The lock is used to protect the action state of the registered
798 * traps. The value is written by user and read in delayed work when
799 * iterating over all the traps.
800 */
801 spin_lock_init(&nsim_trap_data->trap_lock);
802 nsim_trap_data->nsim_dev = nsim_dev;
803 nsim_dev->trap_data = nsim_trap_data;
804
805 err = devlink_trap_policers_register(devlink, nsim_trap_policers_arr,
806 policers_count);
807 if (err)
808 goto err_trap_policers_cnt_free;
809
810 err = devlink_trap_groups_register(devlink, nsim_trap_groups_arr,
811 ARRAY_SIZE(nsim_trap_groups_arr));
812 if (err)
813 goto err_trap_policers_unregister;
814
815 err = devlink_traps_register(devlink, nsim_traps_arr,
816 ARRAY_SIZE(nsim_traps_arr), NULL);
817 if (err)
818 goto err_trap_groups_unregister;
819
820 INIT_DELAYED_WORK(&nsim_dev->trap_data->trap_report_dw,
821 nsim_dev_trap_report_work);
822 schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw,
823 msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS));
824
825 return 0;
826
827err_trap_groups_unregister:
828 devlink_trap_groups_unregister(devlink, nsim_trap_groups_arr,
829 ARRAY_SIZE(nsim_trap_groups_arr));
830err_trap_policers_unregister:
831 devlink_trap_policers_unregister(devlink, nsim_trap_policers_arr,
832 ARRAY_SIZE(nsim_trap_policers_arr));
833err_trap_policers_cnt_free:
834 kfree(nsim_trap_data->trap_policers_cnt_arr);
835err_trap_items_free:
836 kfree(nsim_trap_data->trap_items_arr);
837err_trap_data_free:
838 kfree(nsim_trap_data);
839 return err;
840}
841
842static void nsim_dev_traps_exit(struct devlink *devlink)
843{
844 struct nsim_dev *nsim_dev = devlink_priv(devlink);
845
846 cancel_delayed_work_sync(&nsim_dev->trap_data->trap_report_dw);
847 devlink_traps_unregister(devlink, nsim_traps_arr,
848 ARRAY_SIZE(nsim_traps_arr));
849 devlink_trap_groups_unregister(devlink, nsim_trap_groups_arr,
850 ARRAY_SIZE(nsim_trap_groups_arr));
851 devlink_trap_policers_unregister(devlink, nsim_trap_policers_arr,
852 ARRAY_SIZE(nsim_trap_policers_arr));
853 kfree(nsim_dev->trap_data->trap_policers_cnt_arr);
854 kfree(nsim_dev->trap_data->trap_items_arr);
855 kfree(nsim_dev->trap_data);
856}
857
858static int nsim_dev_reload_create(struct nsim_dev *nsim_dev,
859 struct netlink_ext_ack *extack);
860static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev);
861
862static int nsim_dev_reload_down(struct devlink *devlink, bool netns_change,
863 enum devlink_reload_action action, enum devlink_reload_limit limit,
864 struct netlink_ext_ack *extack)
865{
866 struct nsim_dev *nsim_dev = devlink_priv(devlink);
867 struct nsim_bus_dev *nsim_bus_dev;
868
869 nsim_bus_dev = nsim_dev->nsim_bus_dev;
870 if (!mutex_trylock(&nsim_bus_dev->nsim_bus_reload_lock))
871 return -EOPNOTSUPP;
872
873 if (nsim_dev->dont_allow_reload) {
874 /* For testing purposes, user set debugfs dont_allow_reload
875 * value to true. So forbid it.
876 */
877 NL_SET_ERR_MSG_MOD(extack, "User forbid the reload for testing purposes");
878 mutex_unlock(&nsim_bus_dev->nsim_bus_reload_lock);
879 return -EOPNOTSUPP;
880 }
881 nsim_bus_dev->in_reload = true;
882
883 nsim_dev_reload_destroy(nsim_dev);
884 mutex_unlock(&nsim_bus_dev->nsim_bus_reload_lock);
885 return 0;
886}
887
888static int nsim_dev_reload_up(struct devlink *devlink, enum devlink_reload_action action,
889 enum devlink_reload_limit limit, u32 *actions_performed,
890 struct netlink_ext_ack *extack)
891{
892 struct nsim_dev *nsim_dev = devlink_priv(devlink);
893 struct nsim_bus_dev *nsim_bus_dev;
894 int ret;
895
896 nsim_bus_dev = nsim_dev->nsim_bus_dev;
897 mutex_lock(&nsim_bus_dev->nsim_bus_reload_lock);
898 nsim_bus_dev->in_reload = false;
899
900 if (nsim_dev->fail_reload) {
901 /* For testing purposes, user set debugfs fail_reload
902 * value to true. Fail right away.
903 */
904 NL_SET_ERR_MSG_MOD(extack, "User setup the reload to fail for testing purposes");
905 mutex_unlock(&nsim_bus_dev->nsim_bus_reload_lock);
906 return -EINVAL;
907 }
908
909 *actions_performed = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT);
910 ret = nsim_dev_reload_create(nsim_dev, extack);
911 mutex_unlock(&nsim_bus_dev->nsim_bus_reload_lock);
912 return ret;
913}
914
915static int nsim_dev_info_get(struct devlink *devlink,
916 struct devlink_info_req *req,
917 struct netlink_ext_ack *extack)
918{
919 return devlink_info_driver_name_put(req, DRV_NAME);
920}
921
922#define NSIM_DEV_FLASH_SIZE 500000
923#define NSIM_DEV_FLASH_CHUNK_SIZE 1000
924#define NSIM_DEV_FLASH_CHUNK_TIME_MS 10
925
926static int nsim_dev_flash_update(struct devlink *devlink,
927 struct devlink_flash_update_params *params,
928 struct netlink_ext_ack *extack)
929{
930 struct nsim_dev *nsim_dev = devlink_priv(devlink);
931 int i;
932
933 if ((params->overwrite_mask & ~nsim_dev->fw_update_overwrite_mask) != 0)
934 return -EOPNOTSUPP;
935
936 if (nsim_dev->fw_update_status) {
937 devlink_flash_update_status_notify(devlink,
938 "Preparing to flash",
939 params->component, 0, 0);
940 }
941
942 for (i = 0; i < NSIM_DEV_FLASH_SIZE / NSIM_DEV_FLASH_CHUNK_SIZE; i++) {
943 if (nsim_dev->fw_update_status)
944 devlink_flash_update_status_notify(devlink, "Flashing",
945 params->component,
946 i * NSIM_DEV_FLASH_CHUNK_SIZE,
947 NSIM_DEV_FLASH_SIZE);
948 msleep(NSIM_DEV_FLASH_CHUNK_TIME_MS);
949 }
950
951 if (nsim_dev->fw_update_status) {
952 devlink_flash_update_status_notify(devlink, "Flashing",
953 params->component,
954 NSIM_DEV_FLASH_SIZE,
955 NSIM_DEV_FLASH_SIZE);
956 devlink_flash_update_timeout_notify(devlink, "Flash select",
957 params->component, 81);
958 devlink_flash_update_status_notify(devlink, "Flashing done",
959 params->component, 0, 0);
960 }
961
962 return 0;
963}
964
965static struct nsim_trap_item *
966nsim_dev_trap_item_lookup(struct nsim_dev *nsim_dev, u16 trap_id)
967{
968 struct nsim_trap_data *nsim_trap_data = nsim_dev->trap_data;
969 int i;
970
971 for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) {
972 if (nsim_traps_arr[i].id == trap_id)
973 return &nsim_trap_data->trap_items_arr[i];
974 }
975
976 return NULL;
977}
978
979static int nsim_dev_devlink_trap_init(struct devlink *devlink,
980 const struct devlink_trap *trap,
981 void *trap_ctx)
982{
983 struct nsim_dev *nsim_dev = devlink_priv(devlink);
984 struct nsim_trap_item *nsim_trap_item;
985
986 nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id);
987 if (WARN_ON(!nsim_trap_item))
988 return -ENOENT;
989
990 nsim_trap_item->trap_ctx = trap_ctx;
991 nsim_trap_item->action = trap->init_action;
992
993 return 0;
994}
995
996static int
997nsim_dev_devlink_trap_action_set(struct devlink *devlink,
998 const struct devlink_trap *trap,
999 enum devlink_trap_action action,
1000 struct netlink_ext_ack *extack)
1001{
1002 struct nsim_dev *nsim_dev = devlink_priv(devlink);
1003 struct nsim_trap_item *nsim_trap_item;
1004
1005 nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id);
1006 if (WARN_ON(!nsim_trap_item))
1007 return -ENOENT;
1008
1009 spin_lock(&nsim_dev->trap_data->trap_lock);
1010 nsim_trap_item->action = action;
1011 spin_unlock(&nsim_dev->trap_data->trap_lock);
1012
1013 return 0;
1014}
1015
1016static int
1017nsim_dev_devlink_trap_group_set(struct devlink *devlink,
1018 const struct devlink_trap_group *group,
1019 const struct devlink_trap_policer *policer,
1020 struct netlink_ext_ack *extack)
1021{
1022 struct nsim_dev *nsim_dev = devlink_priv(devlink);
1023
1024 if (nsim_dev->fail_trap_group_set)
1025 return -EINVAL;
1026
1027 return 0;
1028}
1029
1030static int
1031nsim_dev_devlink_trap_policer_set(struct devlink *devlink,
1032 const struct devlink_trap_policer *policer,
1033 u64 rate, u64 burst,
1034 struct netlink_ext_ack *extack)
1035{
1036 struct nsim_dev *nsim_dev = devlink_priv(devlink);
1037
1038 if (nsim_dev->fail_trap_policer_set) {
1039 NL_SET_ERR_MSG_MOD(extack, "User setup the operation to fail for testing purposes");
1040 return -EINVAL;
1041 }
1042
1043 return 0;
1044}
1045
1046static int
1047nsim_dev_devlink_trap_policer_counter_get(struct devlink *devlink,
1048 const struct devlink_trap_policer *policer,
1049 u64 *p_drops)
1050{
1051 struct nsim_dev *nsim_dev = devlink_priv(devlink);
1052 u64 *cnt;
1053
1054 if (nsim_dev->fail_trap_policer_counter_get)
1055 return -EINVAL;
1056
1057 cnt = &nsim_dev->trap_data->trap_policers_cnt_arr[policer->id - 1];
1058 *p_drops = (*cnt)++;
1059
1060 return 0;
1061}
1062
1063#define NSIM_LINK_SPEED_MAX 5000 /* Mbps */
1064#define NSIM_LINK_SPEED_UNIT 125000 /* 1 Mbps given in bytes/sec to avoid
1065 * u64 overflow during conversion from
1066 * bytes to bits.
1067 */
1068
1069static int nsim_rate_bytes_to_units(char *name, u64 *rate, struct netlink_ext_ack *extack)
1070{
1071 u64 val;
1072 u32 rem;
1073
1074 val = div_u64_rem(*rate, NSIM_LINK_SPEED_UNIT, &rem);
1075 if (rem) {
1076 pr_err("%s rate value %lluBps not in link speed units of 1Mbps.\n",
1077 name, *rate);
1078 NL_SET_ERR_MSG_MOD(extack, "TX rate value not in link speed units of 1Mbps.");
1079 return -EINVAL;
1080 }
1081
1082 if (val > NSIM_LINK_SPEED_MAX) {
1083 pr_err("%s rate value %lluMbps exceed link maximum speed 5000Mbps.\n",
1084 name, val);
1085 NL_SET_ERR_MSG_MOD(extack, "TX rate value exceed link maximum speed 5000Mbps.");
1086 return -EINVAL;
1087 }
1088 *rate = val;
1089 return 0;
1090}
1091
1092static int nsim_leaf_tx_share_set(struct devlink_rate *devlink_rate, void *priv,
1093 u64 tx_share, struct netlink_ext_ack *extack)
1094{
1095 struct nsim_dev_port *nsim_dev_port = priv;
1096 struct nsim_bus_dev *nsim_bus_dev = nsim_dev_port->ns->nsim_bus_dev;
1097 int vf_id = nsim_dev_port_index_to_vf_index(nsim_dev_port->port_index);
1098 int err;
1099
1100 err = nsim_rate_bytes_to_units("tx_share", &tx_share, extack);
1101 if (err)
1102 return err;
1103
1104 nsim_bus_dev->vfconfigs[vf_id].min_tx_rate = tx_share;
1105 return 0;
1106}
1107
1108static int nsim_leaf_tx_max_set(struct devlink_rate *devlink_rate, void *priv,
1109 u64 tx_max, struct netlink_ext_ack *extack)
1110{
1111 struct nsim_dev_port *nsim_dev_port = priv;
1112 struct nsim_bus_dev *nsim_bus_dev = nsim_dev_port->ns->nsim_bus_dev;
1113 int vf_id = nsim_dev_port_index_to_vf_index(nsim_dev_port->port_index);
1114 int err;
1115
1116 err = nsim_rate_bytes_to_units("tx_max", &tx_max, extack);
1117 if (err)
1118 return err;
1119
1120 nsim_bus_dev->vfconfigs[vf_id].max_tx_rate = tx_max;
1121 return 0;
1122}
1123
1124struct nsim_rate_node {
1125 struct dentry *ddir;
1126 struct dentry *rate_parent;
1127 char *parent_name;
1128 u16 tx_share;
1129 u16 tx_max;
1130};
1131
1132static int nsim_node_tx_share_set(struct devlink_rate *devlink_rate, void *priv,
1133 u64 tx_share, struct netlink_ext_ack *extack)
1134{
1135 struct nsim_rate_node *nsim_node = priv;
1136 int err;
1137
1138 err = nsim_rate_bytes_to_units("tx_share", &tx_share, extack);
1139 if (err)
1140 return err;
1141
1142 nsim_node->tx_share = tx_share;
1143 return 0;
1144}
1145
1146static int nsim_node_tx_max_set(struct devlink_rate *devlink_rate, void *priv,
1147 u64 tx_max, struct netlink_ext_ack *extack)
1148{
1149 struct nsim_rate_node *nsim_node = priv;
1150 int err;
1151
1152 err = nsim_rate_bytes_to_units("tx_max", &tx_max, extack);
1153 if (err)
1154 return err;
1155
1156 nsim_node->tx_max = tx_max;
1157 return 0;
1158}
1159
1160static int nsim_rate_node_new(struct devlink_rate *node, void **priv,
1161 struct netlink_ext_ack *extack)
1162{
1163 struct nsim_dev *nsim_dev = devlink_priv(node->devlink);
1164 struct nsim_rate_node *nsim_node;
1165
1166 if (!nsim_esw_mode_is_switchdev(nsim_dev)) {
1167 NL_SET_ERR_MSG_MOD(extack, "Node creation allowed only in switchdev mode.");
1168 return -EOPNOTSUPP;
1169 }
1170
1171 nsim_node = kzalloc(sizeof(*nsim_node), GFP_KERNEL);
1172 if (!nsim_node)
1173 return -ENOMEM;
1174
1175 nsim_node->ddir = debugfs_create_dir(node->name, nsim_dev->nodes_ddir);
1176
1177 debugfs_create_u16("tx_share", 0400, nsim_node->ddir, &nsim_node->tx_share);
1178 debugfs_create_u16("tx_max", 0400, nsim_node->ddir, &nsim_node->tx_max);
1179 nsim_node->rate_parent = debugfs_create_file("rate_parent", 0400,
1180 nsim_node->ddir,
1181 &nsim_node->parent_name,
1182 &nsim_dev_rate_parent_fops);
1183
1184 *priv = nsim_node;
1185 return 0;
1186}
1187
1188static int nsim_rate_node_del(struct devlink_rate *node, void *priv,
1189 struct netlink_ext_ack *extack)
1190{
1191 struct nsim_rate_node *nsim_node = priv;
1192
1193 debugfs_remove(nsim_node->rate_parent);
1194 debugfs_remove_recursive(nsim_node->ddir);
1195 kfree(nsim_node);
1196 return 0;
1197}
1198
1199static int nsim_rate_leaf_parent_set(struct devlink_rate *child,
1200 struct devlink_rate *parent,
1201 void *priv_child, void *priv_parent,
1202 struct netlink_ext_ack *extack)
1203{
1204 struct nsim_dev_port *nsim_dev_port = priv_child;
1205
1206 if (parent)
1207 nsim_dev_port->parent_name = parent->name;
1208 else
1209 nsim_dev_port->parent_name = NULL;
1210 return 0;
1211}
1212
1213static int nsim_rate_node_parent_set(struct devlink_rate *child,
1214 struct devlink_rate *parent,
1215 void *priv_child, void *priv_parent,
1216 struct netlink_ext_ack *extack)
1217{
1218 struct nsim_rate_node *nsim_node = priv_child;
1219
1220 if (parent)
1221 nsim_node->parent_name = parent->name;
1222 else
1223 nsim_node->parent_name = NULL;
1224 return 0;
1225}
1226
1227static int
1228nsim_dev_devlink_trap_drop_counter_get(struct devlink *devlink,
1229 const struct devlink_trap *trap,
1230 u64 *p_drops)
1231{
1232 struct nsim_dev *nsim_dev = devlink_priv(devlink);
1233 u64 *cnt;
1234
1235 if (nsim_dev->fail_trap_drop_counter_get)
1236 return -EINVAL;
1237
1238 cnt = &nsim_dev->trap_data->trap_pkt_cnt;
1239 *p_drops = (*cnt)++;
1240
1241 return 0;
1242}
1243
1244static const struct devlink_ops nsim_dev_devlink_ops = {
1245 .eswitch_mode_set = nsim_devlink_eswitch_mode_set,
1246 .eswitch_mode_get = nsim_devlink_eswitch_mode_get,
1247 .supported_flash_update_params = DEVLINK_SUPPORT_FLASH_UPDATE_COMPONENT |
1248 DEVLINK_SUPPORT_FLASH_UPDATE_OVERWRITE_MASK,
1249 .reload_actions = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT),
1250 .reload_down = nsim_dev_reload_down,
1251 .reload_up = nsim_dev_reload_up,
1252 .info_get = nsim_dev_info_get,
1253 .flash_update = nsim_dev_flash_update,
1254 .trap_init = nsim_dev_devlink_trap_init,
1255 .trap_action_set = nsim_dev_devlink_trap_action_set,
1256 .trap_group_set = nsim_dev_devlink_trap_group_set,
1257 .trap_policer_set = nsim_dev_devlink_trap_policer_set,
1258 .trap_policer_counter_get = nsim_dev_devlink_trap_policer_counter_get,
1259 .rate_leaf_tx_share_set = nsim_leaf_tx_share_set,
1260 .rate_leaf_tx_max_set = nsim_leaf_tx_max_set,
1261 .rate_node_tx_share_set = nsim_node_tx_share_set,
1262 .rate_node_tx_max_set = nsim_node_tx_max_set,
1263 .rate_node_new = nsim_rate_node_new,
1264 .rate_node_del = nsim_rate_node_del,
1265 .rate_leaf_parent_set = nsim_rate_leaf_parent_set,
1266 .rate_node_parent_set = nsim_rate_node_parent_set,
1267 .trap_drop_counter_get = nsim_dev_devlink_trap_drop_counter_get,
1268};
1269
1270#define NSIM_DEV_MAX_MACS_DEFAULT 32
1271#define NSIM_DEV_TEST1_DEFAULT true
1272
1273static int __nsim_dev_port_add(struct nsim_dev *nsim_dev, enum nsim_dev_port_type type,
1274 unsigned int port_index)
1275{
1276 struct nsim_bus_dev *nsim_bus_dev = nsim_dev->nsim_bus_dev;
1277 struct devlink_port_attrs attrs = {};
1278 struct nsim_dev_port *nsim_dev_port;
1279 struct devlink_port *devlink_port;
1280 int err;
1281
1282 if (type == NSIM_DEV_PORT_TYPE_VF && !nsim_bus_dev->num_vfs)
1283 return -EINVAL;
1284
1285 nsim_dev_port = kzalloc(sizeof(*nsim_dev_port), GFP_KERNEL);
1286 if (!nsim_dev_port)
1287 return -ENOMEM;
1288 nsim_dev_port->port_index = nsim_dev_port_index(type, port_index);
1289 nsim_dev_port->port_type = type;
1290
1291 devlink_port = &nsim_dev_port->devlink_port;
1292 if (nsim_dev_port_is_pf(nsim_dev_port)) {
1293 attrs.flavour = DEVLINK_PORT_FLAVOUR_PHYSICAL;
1294 attrs.phys.port_number = port_index + 1;
1295 } else {
1296 attrs.flavour = DEVLINK_PORT_FLAVOUR_PCI_VF;
1297 attrs.pci_vf.pf = 0;
1298 attrs.pci_vf.vf = port_index;
1299 }
1300 memcpy(attrs.switch_id.id, nsim_dev->switch_id.id, nsim_dev->switch_id.id_len);
1301 attrs.switch_id.id_len = nsim_dev->switch_id.id_len;
1302 devlink_port_attrs_set(devlink_port, &attrs);
1303 err = devlink_port_register(priv_to_devlink(nsim_dev), devlink_port,
1304 nsim_dev_port->port_index);
1305 if (err)
1306 goto err_port_free;
1307
1308 err = nsim_dev_port_debugfs_init(nsim_dev, nsim_dev_port);
1309 if (err)
1310 goto err_dl_port_unregister;
1311
1312 nsim_dev_port->ns = nsim_create(nsim_dev, nsim_dev_port);
1313 if (IS_ERR(nsim_dev_port->ns)) {
1314 err = PTR_ERR(nsim_dev_port->ns);
1315 goto err_port_debugfs_exit;
1316 }
1317
1318 if (nsim_dev_port_is_vf(nsim_dev_port)) {
1319 err = devlink_rate_leaf_create(&nsim_dev_port->devlink_port,
1320 nsim_dev_port);
1321 if (err)
1322 goto err_nsim_destroy;
1323 }
1324
1325 devlink_port_type_eth_set(devlink_port, nsim_dev_port->ns->netdev);
1326 list_add(&nsim_dev_port->list, &nsim_dev->port_list);
1327
1328 return 0;
1329
1330err_nsim_destroy:
1331 nsim_destroy(nsim_dev_port->ns);
1332err_port_debugfs_exit:
1333 nsim_dev_port_debugfs_exit(nsim_dev_port);
1334err_dl_port_unregister:
1335 devlink_port_unregister(devlink_port);
1336err_port_free:
1337 kfree(nsim_dev_port);
1338 return err;
1339}
1340
1341static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port)
1342{
1343 struct devlink_port *devlink_port = &nsim_dev_port->devlink_port;
1344
1345 list_del(&nsim_dev_port->list);
1346 if (nsim_dev_port_is_vf(nsim_dev_port))
1347 devlink_rate_leaf_destroy(&nsim_dev_port->devlink_port);
1348 devlink_port_type_clear(devlink_port);
1349 nsim_destroy(nsim_dev_port->ns);
1350 nsim_dev_port_debugfs_exit(nsim_dev_port);
1351 devlink_port_unregister(devlink_port);
1352 kfree(nsim_dev_port);
1353}
1354
1355static void nsim_dev_port_del_all(struct nsim_dev *nsim_dev)
1356{
1357 struct nsim_dev_port *nsim_dev_port, *tmp;
1358
1359 mutex_lock(&nsim_dev->port_list_lock);
1360 list_for_each_entry_safe(nsim_dev_port, tmp,
1361 &nsim_dev->port_list, list)
1362 __nsim_dev_port_del(nsim_dev_port);
1363 mutex_unlock(&nsim_dev->port_list_lock);
1364}
1365
1366static int nsim_dev_port_add_all(struct nsim_dev *nsim_dev,
1367 unsigned int port_count)
1368{
1369 int i, err;
1370
1371 for (i = 0; i < port_count; i++) {
1372 err = __nsim_dev_port_add(nsim_dev, NSIM_DEV_PORT_TYPE_PF, i);
1373 if (err)
1374 goto err_port_del_all;
1375 }
1376 return 0;
1377
1378err_port_del_all:
1379 nsim_dev_port_del_all(nsim_dev);
1380 return err;
1381}
1382
1383static int nsim_dev_reload_create(struct nsim_dev *nsim_dev,
1384 struct netlink_ext_ack *extack)
1385{
1386 struct nsim_bus_dev *nsim_bus_dev = nsim_dev->nsim_bus_dev;
1387 struct devlink *devlink;
1388 int err;
1389
1390 devlink = priv_to_devlink(nsim_dev);
1391 nsim_dev = devlink_priv(devlink);
1392 INIT_LIST_HEAD(&nsim_dev->port_list);
1393 mutex_init(&nsim_dev->port_list_lock);
1394 nsim_dev->fw_update_status = true;
1395 nsim_dev->fw_update_overwrite_mask = 0;
1396
1397 nsim_devlink_param_load_driverinit_values(devlink);
1398
1399 err = nsim_dev_dummy_region_init(nsim_dev, devlink);
1400 if (err)
1401 return err;
1402
1403 err = nsim_dev_traps_init(devlink);
1404 if (err)
1405 goto err_dummy_region_exit;
1406
1407 nsim_dev->fib_data = nsim_fib_create(devlink, extack);
1408 if (IS_ERR(nsim_dev->fib_data)) {
1409 err = PTR_ERR(nsim_dev->fib_data);
1410 goto err_traps_exit;
1411 }
1412
1413 err = nsim_dev_health_init(nsim_dev, devlink);
1414 if (err)
1415 goto err_fib_destroy;
1416
1417 err = nsim_dev_psample_init(nsim_dev);
1418 if (err)
1419 goto err_health_exit;
1420
1421 err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count);
1422 if (err)
1423 goto err_psample_exit;
1424
1425 nsim_dev->take_snapshot = debugfs_create_file("take_snapshot",
1426 0200,
1427 nsim_dev->ddir,
1428 nsim_dev,
1429 &nsim_dev_take_snapshot_fops);
1430 return 0;
1431
1432err_psample_exit:
1433 nsim_dev_psample_exit(nsim_dev);
1434err_health_exit:
1435 nsim_dev_health_exit(nsim_dev);
1436err_fib_destroy:
1437 nsim_fib_destroy(devlink, nsim_dev->fib_data);
1438err_traps_exit:
1439 nsim_dev_traps_exit(devlink);
1440err_dummy_region_exit:
1441 nsim_dev_dummy_region_exit(nsim_dev);
1442 return err;
1443}
1444
1445int nsim_dev_probe(struct nsim_bus_dev *nsim_bus_dev)
1446{
1447 struct nsim_dev *nsim_dev;
1448 struct devlink *devlink;
1449 int err;
1450
1451 devlink = devlink_alloc_ns(&nsim_dev_devlink_ops, sizeof(*nsim_dev),
1452 nsim_bus_dev->initial_net, &nsim_bus_dev->dev);
1453 if (!devlink)
1454 return -ENOMEM;
1455 nsim_dev = devlink_priv(devlink);
1456 nsim_dev->nsim_bus_dev = nsim_bus_dev;
1457 nsim_dev->switch_id.id_len = sizeof(nsim_dev->switch_id.id);
1458 get_random_bytes(nsim_dev->switch_id.id, nsim_dev->switch_id.id_len);
1459 INIT_LIST_HEAD(&nsim_dev->port_list);
1460 mutex_init(&nsim_dev->port_list_lock);
1461 nsim_dev->fw_update_status = true;
1462 nsim_dev->fw_update_overwrite_mask = 0;
1463 nsim_dev->max_macs = NSIM_DEV_MAX_MACS_DEFAULT;
1464 nsim_dev->test1 = NSIM_DEV_TEST1_DEFAULT;
1465 spin_lock_init(&nsim_dev->fa_cookie_lock);
1466
1467 dev_set_drvdata(&nsim_bus_dev->dev, nsim_dev);
1468
1469 err = nsim_dev_resources_register(devlink);
1470 if (err)
1471 goto err_devlink_free;
1472
1473 err = devlink_register(devlink);
1474 if (err)
1475 goto err_resources_unregister;
1476
1477 err = devlink_params_register(devlink, nsim_devlink_params,
1478 ARRAY_SIZE(nsim_devlink_params));
1479 if (err)
1480 goto err_dl_unregister;
1481 nsim_devlink_set_params_init_values(nsim_dev, devlink);
1482
1483 err = nsim_dev_dummy_region_init(nsim_dev, devlink);
1484 if (err)
1485 goto err_params_unregister;
1486
1487 err = nsim_dev_traps_init(devlink);
1488 if (err)
1489 goto err_dummy_region_exit;
1490
1491 err = nsim_dev_debugfs_init(nsim_dev);
1492 if (err)
1493 goto err_traps_exit;
1494
1495 nsim_dev->fib_data = nsim_fib_create(devlink, NULL);
1496 if (IS_ERR(nsim_dev->fib_data)) {
1497 err = PTR_ERR(nsim_dev->fib_data);
1498 goto err_debugfs_exit;
1499 }
1500
1501 err = nsim_dev_health_init(nsim_dev, devlink);
1502 if (err)
1503 goto err_fib_destroy;
1504
1505 err = nsim_bpf_dev_init(nsim_dev);
1506 if (err)
1507 goto err_health_exit;
1508
1509 err = nsim_dev_psample_init(nsim_dev);
1510 if (err)
1511 goto err_bpf_dev_exit;
1512
1513 err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count);
1514 if (err)
1515 goto err_psample_exit;
1516
1517 devlink_params_publish(devlink);
1518 devlink_reload_enable(devlink);
1519 nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_LEGACY;
1520 return 0;
1521
1522err_psample_exit:
1523 nsim_dev_psample_exit(nsim_dev);
1524err_bpf_dev_exit:
1525 nsim_bpf_dev_exit(nsim_dev);
1526err_health_exit:
1527 nsim_dev_health_exit(nsim_dev);
1528err_fib_destroy:
1529 nsim_fib_destroy(devlink, nsim_dev->fib_data);
1530err_debugfs_exit:
1531 nsim_dev_debugfs_exit(nsim_dev);
1532err_traps_exit:
1533 nsim_dev_traps_exit(devlink);
1534err_dummy_region_exit:
1535 nsim_dev_dummy_region_exit(nsim_dev);
1536err_params_unregister:
1537 devlink_params_unregister(devlink, nsim_devlink_params,
1538 ARRAY_SIZE(nsim_devlink_params));
1539err_dl_unregister:
1540 devlink_unregister(devlink);
1541err_resources_unregister:
1542 devlink_resources_unregister(devlink, NULL);
1543err_devlink_free:
1544 devlink_free(devlink);
1545 return err;
1546}
1547
1548static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev)
1549{
1550 struct devlink *devlink = priv_to_devlink(nsim_dev);
1551
1552 if (devlink_is_reload_failed(devlink))
1553 return;
1554 debugfs_remove(nsim_dev->take_snapshot);
1555
1556 mutex_lock(&nsim_dev->nsim_bus_dev->vfs_lock);
1557 if (nsim_dev->nsim_bus_dev->num_vfs)
1558 nsim_bus_dev_vfs_disable(nsim_dev->nsim_bus_dev);
1559 mutex_unlock(&nsim_dev->nsim_bus_dev->vfs_lock);
1560
1561 nsim_dev_port_del_all(nsim_dev);
1562 nsim_dev_psample_exit(nsim_dev);
1563 nsim_dev_health_exit(nsim_dev);
1564 nsim_fib_destroy(devlink, nsim_dev->fib_data);
1565 nsim_dev_traps_exit(devlink);
1566 nsim_dev_dummy_region_exit(nsim_dev);
1567 mutex_destroy(&nsim_dev->port_list_lock);
1568}
1569
1570void nsim_dev_remove(struct nsim_bus_dev *nsim_bus_dev)
1571{
1572 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
1573 struct devlink *devlink = priv_to_devlink(nsim_dev);
1574
1575 devlink_reload_disable(devlink);
1576
1577 nsim_dev_reload_destroy(nsim_dev);
1578
1579 nsim_bpf_dev_exit(nsim_dev);
1580 nsim_dev_debugfs_exit(nsim_dev);
1581 devlink_params_unregister(devlink, nsim_devlink_params,
1582 ARRAY_SIZE(nsim_devlink_params));
1583 devlink_unregister(devlink);
1584 devlink_resources_unregister(devlink, NULL);
1585 devlink_free(devlink);
1586}
1587
1588static struct nsim_dev_port *
1589__nsim_dev_port_lookup(struct nsim_dev *nsim_dev, enum nsim_dev_port_type type,
1590 unsigned int port_index)
1591{
1592 struct nsim_dev_port *nsim_dev_port;
1593
1594 port_index = nsim_dev_port_index(type, port_index);
1595 list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list)
1596 if (nsim_dev_port->port_index == port_index)
1597 return nsim_dev_port;
1598 return NULL;
1599}
1600
1601int nsim_dev_port_add(struct nsim_bus_dev *nsim_bus_dev, enum nsim_dev_port_type type,
1602 unsigned int port_index)
1603{
1604 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
1605 int err;
1606
1607 mutex_lock(&nsim_dev->port_list_lock);
1608 if (__nsim_dev_port_lookup(nsim_dev, type, port_index))
1609 err = -EEXIST;
1610 else
1611 err = __nsim_dev_port_add(nsim_dev, type, port_index);
1612 mutex_unlock(&nsim_dev->port_list_lock);
1613 return err;
1614}
1615
1616int nsim_dev_port_del(struct nsim_bus_dev *nsim_bus_dev, enum nsim_dev_port_type type,
1617 unsigned int port_index)
1618{
1619 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
1620 struct nsim_dev_port *nsim_dev_port;
1621 int err = 0;
1622
1623 mutex_lock(&nsim_dev->port_list_lock);
1624 nsim_dev_port = __nsim_dev_port_lookup(nsim_dev, type, port_index);
1625 if (!nsim_dev_port)
1626 err = -ENOENT;
1627 else
1628 __nsim_dev_port_del(nsim_dev_port);
1629 mutex_unlock(&nsim_dev->port_list_lock);
1630 return err;
1631}
1632
1633int nsim_dev_init(void)
1634{
1635 nsim_dev_ddir = debugfs_create_dir(DRV_NAME, NULL);
1636 return PTR_ERR_OR_ZERO(nsim_dev_ddir);
1637}
1638
1639void nsim_dev_exit(void)
1640{
1641 debugfs_remove_recursive(nsim_dev_ddir);
1642}