projects/linux·blob 4563243e · refs

1780 lines · 48.6 KiB

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
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
188 buf = memdup_user(data, count);
189 if (IS_ERR(buf))
190 return PTR_ERR(buf);
191
192 fa_cookie = kmalloc(sizeof(*fa_cookie) + cookie_len,
193 GFP_KERNEL | __GFP_NOWARN);
194 if (!fa_cookie) {
195 ret = -ENOMEM;
196 goto free_buf;
197 }
198
199 fa_cookie->cookie_len = cookie_len;
200 ret = hex2bin(fa_cookie->cookie, buf, cookie_len);
201 if (ret)
202 goto free_fa_cookie;
203 kfree(buf);
204
205 spin_lock(&nsim_dev->fa_cookie_lock);
206 kfree(nsim_dev->fa_cookie);
207 nsim_dev->fa_cookie = fa_cookie;
208 spin_unlock(&nsim_dev->fa_cookie_lock);
209
210 return count;
211
212free_fa_cookie:
213 kfree(fa_cookie);
214free_buf:
215 kfree(buf);
216 return ret;
217}
218
219static const struct file_operations nsim_dev_trap_fa_cookie_fops = {
220 .open = simple_open,
221 .read = nsim_dev_trap_fa_cookie_read,
222 .write = nsim_dev_trap_fa_cookie_write,
223 .llseek = generic_file_llseek,
224 .owner = THIS_MODULE,
225};
226
227static ssize_t nsim_bus_dev_max_vfs_read(struct file *file, char __user *data,
228 size_t count, loff_t *ppos)
229{
230 struct nsim_dev *nsim_dev = file->private_data;
231 char buf[11];
232 ssize_t len;
233
234 len = scnprintf(buf, sizeof(buf), "%u\n",
235 READ_ONCE(nsim_dev->nsim_bus_dev->max_vfs));
236
237 return simple_read_from_buffer(data, count, ppos, buf, len);
238}
239
240static ssize_t nsim_bus_dev_max_vfs_write(struct file *file,
241 const char __user *data,
242 size_t count, loff_t *ppos)
243{
244 struct nsim_vf_config *vfconfigs;
245 struct nsim_dev *nsim_dev;
246 char buf[10];
247 ssize_t ret;
248 u32 val;
249
250 if (*ppos != 0)
251 return 0;
252
253 if (count >= sizeof(buf))
254 return -ENOSPC;
255
256 ret = copy_from_user(buf, data, count);
257 if (ret)
258 return -EFAULT;
259 buf[count] = '\0';
260
261 ret = kstrtouint(buf, 10, &val);
262 if (ret)
263 return -EINVAL;
264
265 /* max_vfs limited by the maximum number of provided port indexes */
266 if (val > NSIM_DEV_VF_PORT_INDEX_MAX - NSIM_DEV_VF_PORT_INDEX_BASE)
267 return -ERANGE;
268
269 vfconfigs = kcalloc(val, sizeof(struct nsim_vf_config),
270 GFP_KERNEL | __GFP_NOWARN);
271 if (!vfconfigs)
272 return -ENOMEM;
273
274 nsim_dev = file->private_data;
275 devl_lock(priv_to_devlink(nsim_dev));
276 /* Reject if VFs are configured */
277 if (nsim_dev_get_vfs(nsim_dev)) {
278 ret = -EBUSY;
279 } else {
280 swap(nsim_dev->vfconfigs, vfconfigs);
281 WRITE_ONCE(nsim_dev->nsim_bus_dev->max_vfs, val);
282 *ppos += count;
283 ret = count;
284 }
285 devl_unlock(priv_to_devlink(nsim_dev));
286
287 kfree(vfconfigs);
288 return ret;
289}
290
291static const struct file_operations nsim_dev_max_vfs_fops = {
292 .open = simple_open,
293 .read = nsim_bus_dev_max_vfs_read,
294 .write = nsim_bus_dev_max_vfs_write,
295 .llseek = generic_file_llseek,
296 .owner = THIS_MODULE,
297};
298
299static int nsim_dev_debugfs_init(struct nsim_dev *nsim_dev)
300{
301 char dev_ddir_name[sizeof(DRV_NAME) + 10];
302 int err;
303
304 sprintf(dev_ddir_name, DRV_NAME "%u", nsim_dev->nsim_bus_dev->dev.id);
305 nsim_dev->ddir = debugfs_create_dir(dev_ddir_name, nsim_dev_ddir);
306 if (IS_ERR(nsim_dev->ddir))
307 return PTR_ERR(nsim_dev->ddir);
308 nsim_dev->ports_ddir = debugfs_create_dir("ports", nsim_dev->ddir);
309 if (IS_ERR(nsim_dev->ports_ddir)) {
310 err = PTR_ERR(nsim_dev->ports_ddir);
311 goto err_ddir;
312 }
313 debugfs_create_bool("fw_update_status", 0600, nsim_dev->ddir,
314 &nsim_dev->fw_update_status);
315 debugfs_create_u32("fw_update_overwrite_mask", 0600, nsim_dev->ddir,
316 &nsim_dev->fw_update_overwrite_mask);
317 debugfs_create_u32("max_macs", 0600, nsim_dev->ddir,
318 &nsim_dev->max_macs);
319 debugfs_create_bool("test1", 0600, nsim_dev->ddir,
320 &nsim_dev->test1);
321 nsim_dev->take_snapshot = debugfs_create_file("take_snapshot",
322 0200,
323 nsim_dev->ddir,
324 nsim_dev,
325 &nsim_dev_take_snapshot_fops);
326 debugfs_create_bool("dont_allow_reload", 0600, nsim_dev->ddir,
327 &nsim_dev->dont_allow_reload);
328 debugfs_create_bool("fail_reload", 0600, nsim_dev->ddir,
329 &nsim_dev->fail_reload);
330 debugfs_create_file("trap_flow_action_cookie", 0600, nsim_dev->ddir,
331 nsim_dev, &nsim_dev_trap_fa_cookie_fops);
332 debugfs_create_bool("fail_trap_group_set", 0600,
333 nsim_dev->ddir,
334 &nsim_dev->fail_trap_group_set);
335 debugfs_create_bool("fail_trap_policer_set", 0600,
336 nsim_dev->ddir,
337 &nsim_dev->fail_trap_policer_set);
338 debugfs_create_bool("fail_trap_policer_counter_get", 0600,
339 nsim_dev->ddir,
340 &nsim_dev->fail_trap_policer_counter_get);
341 /* caution, dev_max_vfs write takes devlink lock */
342 debugfs_create_file("max_vfs", 0600, nsim_dev->ddir,
343 nsim_dev, &nsim_dev_max_vfs_fops);
344
345 nsim_dev->nodes_ddir = debugfs_create_dir("rate_nodes", nsim_dev->ddir);
346 if (IS_ERR(nsim_dev->nodes_ddir)) {
347 err = PTR_ERR(nsim_dev->nodes_ddir);
348 goto err_ports_ddir;
349 }
350 debugfs_create_bool("fail_trap_drop_counter_get", 0600,
351 nsim_dev->ddir,
352 &nsim_dev->fail_trap_drop_counter_get);
353 nsim_udp_tunnels_debugfs_create(nsim_dev);
354 return 0;
355
356err_ports_ddir:
357 debugfs_remove_recursive(nsim_dev->ports_ddir);
358err_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 /* Resources for IPv4 */
439 err = devl_resource_register(devlink, "IPv4", (u64)-1,
440 NSIM_RESOURCE_IPV4,
441 DEVLINK_RESOURCE_ID_PARENT_TOP,
442 &params);
443 if (err) {
444 pr_err("Failed to register IPv4 top resource\n");
445 goto err_out;
446 }
447
448 err = devl_resource_register(devlink, "fib", (u64)-1,
449 NSIM_RESOURCE_IPV4_FIB,
450 NSIM_RESOURCE_IPV4, &params);
451 if (err) {
452 pr_err("Failed to register IPv4 FIB resource\n");
453 goto err_out;
454 }
455
456 err = devl_resource_register(devlink, "fib-rules", (u64)-1,
457 NSIM_RESOURCE_IPV4_FIB_RULES,
458 NSIM_RESOURCE_IPV4, &params);
459 if (err) {
460 pr_err("Failed to register IPv4 FIB rules resource\n");
461 goto err_out;
462 }
463
464 /* Resources for IPv6 */
465 err = devl_resource_register(devlink, "IPv6", (u64)-1,
466 NSIM_RESOURCE_IPV6,
467 DEVLINK_RESOURCE_ID_PARENT_TOP,
468 &params);
469 if (err) {
470 pr_err("Failed to register IPv6 top resource\n");
471 goto err_out;
472 }
473
474 err = devl_resource_register(devlink, "fib", (u64)-1,
475 NSIM_RESOURCE_IPV6_FIB,
476 NSIM_RESOURCE_IPV6, &params);
477 if (err) {
478 pr_err("Failed to register IPv6 FIB resource\n");
479 goto err_out;
480 }
481
482 err = devl_resource_register(devlink, "fib-rules", (u64)-1,
483 NSIM_RESOURCE_IPV6_FIB_RULES,
484 NSIM_RESOURCE_IPV6, &params);
485 if (err) {
486 pr_err("Failed to register IPv6 FIB rules resource\n");
487 goto err_out;
488 }
489
490 /* Resources for nexthops */
491 err = devl_resource_register(devlink, "nexthops", (u64)-1,
492 NSIM_RESOURCE_NEXTHOPS,
493 DEVLINK_RESOURCE_ID_PARENT_TOP,
494 &params);
495 if (err) {
496 pr_err("Failed to register NEXTHOPS resource\n");
497 goto err_out;
498 }
499 return 0;
500
501err_out:
502 devl_resources_unregister(devlink);
503 return err;
504}
505
506enum nsim_devlink_param_id {
507 NSIM_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX,
508 NSIM_DEVLINK_PARAM_ID_TEST1,
509};
510
511static const struct devlink_param nsim_devlink_params[] = {
512 DEVLINK_PARAM_GENERIC(MAX_MACS,
513 BIT(DEVLINK_PARAM_CMODE_DRIVERINIT),
514 NULL, NULL, NULL),
515 DEVLINK_PARAM_DRIVER(NSIM_DEVLINK_PARAM_ID_TEST1,
516 "test1", DEVLINK_PARAM_TYPE_BOOL,
517 BIT(DEVLINK_PARAM_CMODE_DRIVERINIT),
518 NULL, NULL, NULL),
519};
520
521static void nsim_devlink_set_params_init_values(struct nsim_dev *nsim_dev,
522 struct devlink *devlink)
523{
524 union devlink_param_value value;
525
526 value.vu32 = nsim_dev->max_macs;
527 devl_param_driverinit_value_set(devlink,
528 DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
529 value);
530 value.vbool = nsim_dev->test1;
531 devl_param_driverinit_value_set(devlink,
532 NSIM_DEVLINK_PARAM_ID_TEST1,
533 value);
534}
535
536static void nsim_devlink_param_load_driverinit_values(struct devlink *devlink)
537{
538 struct nsim_dev *nsim_dev = devlink_priv(devlink);
539 union devlink_param_value saved_value;
540 int err;
541
542 err = devl_param_driverinit_value_get(devlink,
543 DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
544 &saved_value);
545 if (!err)
546 nsim_dev->max_macs = saved_value.vu32;
547 err = devl_param_driverinit_value_get(devlink,
548 NSIM_DEVLINK_PARAM_ID_TEST1,
549 &saved_value);
550 if (!err)
551 nsim_dev->test1 = saved_value.vbool;
552}
553
554#define NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX 16
555
556static const struct devlink_region_ops dummy_region_ops = {
557 .name = "dummy",
558 .destructor = &kfree,
559 .snapshot = nsim_dev_take_snapshot,
560};
561
562static int nsim_dev_dummy_region_init(struct nsim_dev *nsim_dev,
563 struct devlink *devlink)
564{
565 nsim_dev->dummy_region =
566 devl_region_create(devlink, &dummy_region_ops,
567 NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX,
568 NSIM_DEV_DUMMY_REGION_SIZE);
569 return PTR_ERR_OR_ZERO(nsim_dev->dummy_region);
570}
571
572static void nsim_dev_dummy_region_exit(struct nsim_dev *nsim_dev)
573{
574 devl_region_destroy(nsim_dev->dummy_region);
575}
576
577static int
578__nsim_dev_port_add(struct nsim_dev *nsim_dev, enum nsim_dev_port_type type,
579 unsigned int port_index);
580static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port);
581
582static int nsim_esw_legacy_enable(struct nsim_dev *nsim_dev,
583 struct netlink_ext_ack *extack)
584{
585 struct devlink *devlink = priv_to_devlink(nsim_dev);
586 struct nsim_dev_port *nsim_dev_port, *tmp;
587
588 devl_rate_nodes_destroy(devlink);
589 list_for_each_entry_safe(nsim_dev_port, tmp, &nsim_dev->port_list, list)
590 if (nsim_dev_port_is_vf(nsim_dev_port))
591 __nsim_dev_port_del(nsim_dev_port);
592 nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_LEGACY;
593 return 0;
594}
595
596static int nsim_esw_switchdev_enable(struct nsim_dev *nsim_dev,
597 struct netlink_ext_ack *extack)
598{
599 struct nsim_dev_port *nsim_dev_port, *tmp;
600 int i, err;
601
602 for (i = 0; i < nsim_dev_get_vfs(nsim_dev); i++) {
603 err = __nsim_dev_port_add(nsim_dev, NSIM_DEV_PORT_TYPE_VF, i);
604 if (err) {
605 NL_SET_ERR_MSG_MOD(extack, "Failed to initialize VFs' netdevsim ports");
606 pr_err("Failed to initialize VF id=%d. %d.\n", i, err);
607 goto err_port_add_vfs;
608 }
609 }
610 nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_SWITCHDEV;
611 return 0;
612
613err_port_add_vfs:
614 list_for_each_entry_safe(nsim_dev_port, tmp, &nsim_dev->port_list, list)
615 if (nsim_dev_port_is_vf(nsim_dev_port))
616 __nsim_dev_port_del(nsim_dev_port);
617 return err;
618}
619
620static int nsim_devlink_eswitch_mode_set(struct devlink *devlink, u16 mode,
621 struct netlink_ext_ack *extack)
622{
623 struct nsim_dev *nsim_dev = devlink_priv(devlink);
624
625 if (mode == nsim_dev->esw_mode)
626 return 0;
627
628 if (mode == DEVLINK_ESWITCH_MODE_LEGACY)
629 return nsim_esw_legacy_enable(nsim_dev, extack);
630 if (mode == DEVLINK_ESWITCH_MODE_SWITCHDEV)
631 return nsim_esw_switchdev_enable(nsim_dev, extack);
632
633 return -EINVAL;
634}
635
636static int nsim_devlink_eswitch_mode_get(struct devlink *devlink, u16 *mode)
637{
638 struct nsim_dev *nsim_dev = devlink_priv(devlink);
639
640 *mode = nsim_dev->esw_mode;
641 return 0;
642}
643
644struct nsim_trap_item {
645 void *trap_ctx;
646 enum devlink_trap_action action;
647};
648
649struct nsim_trap_data {
650 struct delayed_work trap_report_dw;
651 struct nsim_trap_item *trap_items_arr;
652 u64 *trap_policers_cnt_arr;
653 u64 trap_pkt_cnt;
654 struct nsim_dev *nsim_dev;
655 spinlock_t trap_lock; /* Protects trap_items_arr */
656};
657
658/* All driver-specific traps must be documented in
659 * Documentation/networking/devlink/netdevsim.rst
660 */
661enum {
662 NSIM_TRAP_ID_BASE = DEVLINK_TRAP_GENERIC_ID_MAX,
663 NSIM_TRAP_ID_FID_MISS,
664};
665
666#define NSIM_TRAP_NAME_FID_MISS "fid_miss"
667
668#define NSIM_TRAP_METADATA DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT
669
670#define NSIM_TRAP_DROP(_id, _group_id) \
671 DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \
672 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \
673 NSIM_TRAP_METADATA)
674#define NSIM_TRAP_DROP_EXT(_id, _group_id, _metadata) \
675 DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \
676 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \
677 NSIM_TRAP_METADATA | (_metadata))
678#define NSIM_TRAP_EXCEPTION(_id, _group_id) \
679 DEVLINK_TRAP_GENERIC(EXCEPTION, TRAP, _id, \
680 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \
681 NSIM_TRAP_METADATA)
682#define NSIM_TRAP_CONTROL(_id, _group_id, _action) \
683 DEVLINK_TRAP_GENERIC(CONTROL, _action, _id, \
684 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \
685 NSIM_TRAP_METADATA)
686#define NSIM_TRAP_DRIVER_EXCEPTION(_id, _group_id) \
687 DEVLINK_TRAP_DRIVER(EXCEPTION, TRAP, NSIM_TRAP_ID_##_id, \
688 NSIM_TRAP_NAME_##_id, \
689 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \
690 NSIM_TRAP_METADATA)
691
692#define NSIM_DEV_TRAP_POLICER_MIN_RATE 1
693#define NSIM_DEV_TRAP_POLICER_MAX_RATE 8000
694#define NSIM_DEV_TRAP_POLICER_MIN_BURST 8
695#define NSIM_DEV_TRAP_POLICER_MAX_BURST 65536
696
697#define NSIM_TRAP_POLICER(_id, _rate, _burst) \
698 DEVLINK_TRAP_POLICER(_id, _rate, _burst, \
699 NSIM_DEV_TRAP_POLICER_MAX_RATE, \
700 NSIM_DEV_TRAP_POLICER_MIN_RATE, \
701 NSIM_DEV_TRAP_POLICER_MAX_BURST, \
702 NSIM_DEV_TRAP_POLICER_MIN_BURST)
703
704static const struct devlink_trap_policer nsim_trap_policers_arr[] = {
705 NSIM_TRAP_POLICER(1, 1000, 128),
706 NSIM_TRAP_POLICER(2, 2000, 256),
707 NSIM_TRAP_POLICER(3, 3000, 512),
708};
709
710static const struct devlink_trap_group nsim_trap_groups_arr[] = {
711 DEVLINK_TRAP_GROUP_GENERIC(L2_DROPS, 0),
712 DEVLINK_TRAP_GROUP_GENERIC(L3_DROPS, 1),
713 DEVLINK_TRAP_GROUP_GENERIC(L3_EXCEPTIONS, 1),
714 DEVLINK_TRAP_GROUP_GENERIC(BUFFER_DROPS, 2),
715 DEVLINK_TRAP_GROUP_GENERIC(ACL_DROPS, 3),
716 DEVLINK_TRAP_GROUP_GENERIC(MC_SNOOPING, 3),
717};
718
719static const struct devlink_trap nsim_traps_arr[] = {
720 NSIM_TRAP_DROP(SMAC_MC, L2_DROPS),
721 NSIM_TRAP_DROP(VLAN_TAG_MISMATCH, L2_DROPS),
722 NSIM_TRAP_DROP(INGRESS_VLAN_FILTER, L2_DROPS),
723 NSIM_TRAP_DROP(INGRESS_STP_FILTER, L2_DROPS),
724 NSIM_TRAP_DROP(EMPTY_TX_LIST, L2_DROPS),
725 NSIM_TRAP_DROP(PORT_LOOPBACK_FILTER, L2_DROPS),
726 NSIM_TRAP_DRIVER_EXCEPTION(FID_MISS, L2_DROPS),
727 NSIM_TRAP_DROP(BLACKHOLE_ROUTE, L3_DROPS),
728 NSIM_TRAP_EXCEPTION(TTL_ERROR, L3_EXCEPTIONS),
729 NSIM_TRAP_DROP(TAIL_DROP, BUFFER_DROPS),
730 NSIM_TRAP_DROP_EXT(INGRESS_FLOW_ACTION_DROP, ACL_DROPS,
731 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE),
732 NSIM_TRAP_DROP_EXT(EGRESS_FLOW_ACTION_DROP, ACL_DROPS,
733 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE),
734 NSIM_TRAP_CONTROL(IGMP_QUERY, MC_SNOOPING, MIRROR),
735 NSIM_TRAP_CONTROL(IGMP_V1_REPORT, MC_SNOOPING, TRAP),
736};
737
738#define NSIM_TRAP_L4_DATA_LEN 100
739
740static struct sk_buff *nsim_dev_trap_skb_build(void)
741{
742 int tot_len, data_len = NSIM_TRAP_L4_DATA_LEN;
743 struct sk_buff *skb;
744 struct udphdr *udph;
745 struct ethhdr *eth;
746 struct iphdr *iph;
747
748 skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
749 if (!skb)
750 return NULL;
751 tot_len = sizeof(struct iphdr) + sizeof(struct udphdr) + data_len;
752
753 skb_reset_mac_header(skb);
754 eth = skb_put(skb, sizeof(struct ethhdr));
755 eth_random_addr(eth->h_dest);
756 eth_random_addr(eth->h_source);
757 eth->h_proto = htons(ETH_P_IP);
758 skb->protocol = htons(ETH_P_IP);
759
760 skb_set_network_header(skb, skb->len);
761 iph = skb_put(skb, sizeof(struct iphdr));
762 iph->protocol = IPPROTO_UDP;
763 iph->saddr = in_aton("192.0.2.1");
764 iph->daddr = in_aton("198.51.100.1");
765 iph->version = 0x4;
766 iph->frag_off = 0;
767 iph->ihl = 0x5;
768 iph->tot_len = htons(tot_len);
769 iph->ttl = 100;
770 iph->check = 0;
771 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
772
773 skb_set_transport_header(skb, skb->len);
774 udph = skb_put_zero(skb, sizeof(struct udphdr) + data_len);
775 get_random_bytes(&udph->source, sizeof(u16));
776 get_random_bytes(&udph->dest, sizeof(u16));
777 udph->len = htons(sizeof(struct udphdr) + data_len);
778
779 return skb;
780}
781
782static void nsim_dev_trap_report(struct nsim_dev_port *nsim_dev_port)
783{
784 struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev;
785 struct devlink *devlink = priv_to_devlink(nsim_dev);
786 struct nsim_trap_data *nsim_trap_data;
787 int i;
788
789 nsim_trap_data = nsim_dev->trap_data;
790
791 spin_lock(&nsim_trap_data->trap_lock);
792 for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) {
793 struct flow_action_cookie *fa_cookie = NULL;
794 struct nsim_trap_item *nsim_trap_item;
795 struct sk_buff *skb;
796 bool has_fa_cookie;
797
798 has_fa_cookie = nsim_traps_arr[i].metadata_cap &
799 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE;
800
801 nsim_trap_item = &nsim_trap_data->trap_items_arr[i];
802 if (nsim_trap_item->action == DEVLINK_TRAP_ACTION_DROP)
803 continue;
804
805 skb = nsim_dev_trap_skb_build();
806 if (!skb)
807 continue;
808 skb->dev = nsim_dev_port->ns->netdev;
809
810 /* Trapped packets are usually passed to devlink in softIRQ,
811 * but in this case they are generated in a workqueue. Disable
812 * softIRQs to prevent lockdep from complaining about
813 * "incosistent lock state".
814 */
815
816 spin_lock_bh(&nsim_dev->fa_cookie_lock);
817 fa_cookie = has_fa_cookie ? nsim_dev->fa_cookie : NULL;
818 devlink_trap_report(devlink, skb, nsim_trap_item->trap_ctx,
819 &nsim_dev_port->devlink_port, fa_cookie);
820 spin_unlock_bh(&nsim_dev->fa_cookie_lock);
821 consume_skb(skb);
822 }
823 spin_unlock(&nsim_trap_data->trap_lock);
824}
825
826#define NSIM_TRAP_REPORT_INTERVAL_MS 100
827
828static void nsim_dev_trap_report_work(struct work_struct *work)
829{
830 struct nsim_trap_data *nsim_trap_data;
831 struct nsim_dev_port *nsim_dev_port;
832 struct nsim_dev *nsim_dev;
833
834 nsim_trap_data = container_of(work, struct nsim_trap_data,
835 trap_report_dw.work);
836 nsim_dev = nsim_trap_data->nsim_dev;
837
838 if (!devl_trylock(priv_to_devlink(nsim_dev))) {
839 schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw, 1);
840 return;
841 }
842
843 /* For each running port and enabled packet trap, generate a UDP
844 * packet with a random 5-tuple and report it.
845 */
846 list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list) {
847 if (!netif_running(nsim_dev_port->ns->netdev))
848 continue;
849
850 nsim_dev_trap_report(nsim_dev_port);
851 }
852 devl_unlock(priv_to_devlink(nsim_dev));
853
854 schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw,
855 msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS));
856}
857
858static int nsim_dev_traps_init(struct devlink *devlink)
859{
860 size_t policers_count = ARRAY_SIZE(nsim_trap_policers_arr);
861 struct nsim_dev *nsim_dev = devlink_priv(devlink);
862 struct nsim_trap_data *nsim_trap_data;
863 int err;
864
865 nsim_trap_data = kzalloc(sizeof(*nsim_trap_data), GFP_KERNEL);
866 if (!nsim_trap_data)
867 return -ENOMEM;
868
869 nsim_trap_data->trap_items_arr = kcalloc(ARRAY_SIZE(nsim_traps_arr),
870 sizeof(struct nsim_trap_item),
871 GFP_KERNEL);
872 if (!nsim_trap_data->trap_items_arr) {
873 err = -ENOMEM;
874 goto err_trap_data_free;
875 }
876
877 nsim_trap_data->trap_policers_cnt_arr = kcalloc(policers_count,
878 sizeof(u64),
879 GFP_KERNEL);
880 if (!nsim_trap_data->trap_policers_cnt_arr) {
881 err = -ENOMEM;
882 goto err_trap_items_free;
883 }
884
885 /* The lock is used to protect the action state of the registered
886 * traps. The value is written by user and read in delayed work when
887 * iterating over all the traps.
888 */
889 spin_lock_init(&nsim_trap_data->trap_lock);
890 nsim_trap_data->nsim_dev = nsim_dev;
891 nsim_dev->trap_data = nsim_trap_data;
892
893 err = devl_trap_policers_register(devlink, nsim_trap_policers_arr,
894 policers_count);
895 if (err)
896 goto err_trap_policers_cnt_free;
897
898 err = devl_trap_groups_register(devlink, nsim_trap_groups_arr,
899 ARRAY_SIZE(nsim_trap_groups_arr));
900 if (err)
901 goto err_trap_policers_unregister;
902
903 err = devl_traps_register(devlink, nsim_traps_arr,
904 ARRAY_SIZE(nsim_traps_arr), NULL);
905 if (err)
906 goto err_trap_groups_unregister;
907
908 INIT_DELAYED_WORK(&nsim_dev->trap_data->trap_report_dw,
909 nsim_dev_trap_report_work);
910 schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw,
911 msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS));
912
913 return 0;
914
915err_trap_groups_unregister:
916 devl_trap_groups_unregister(devlink, nsim_trap_groups_arr,
917 ARRAY_SIZE(nsim_trap_groups_arr));
918err_trap_policers_unregister:
919 devl_trap_policers_unregister(devlink, nsim_trap_policers_arr,
920 ARRAY_SIZE(nsim_trap_policers_arr));
921err_trap_policers_cnt_free:
922 kfree(nsim_trap_data->trap_policers_cnt_arr);
923err_trap_items_free:
924 kfree(nsim_trap_data->trap_items_arr);
925err_trap_data_free:
926 kfree(nsim_trap_data);
927 return err;
928}
929
930static void nsim_dev_traps_exit(struct devlink *devlink)
931{
932 struct nsim_dev *nsim_dev = devlink_priv(devlink);
933
934 /* caution, trap work takes devlink lock */
935 cancel_delayed_work_sync(&nsim_dev->trap_data->trap_report_dw);
936 devl_traps_unregister(devlink, nsim_traps_arr,
937 ARRAY_SIZE(nsim_traps_arr));
938 devl_trap_groups_unregister(devlink, nsim_trap_groups_arr,
939 ARRAY_SIZE(nsim_trap_groups_arr));
940 devl_trap_policers_unregister(devlink, nsim_trap_policers_arr,
941 ARRAY_SIZE(nsim_trap_policers_arr));
942 kfree(nsim_dev->trap_data->trap_policers_cnt_arr);
943 kfree(nsim_dev->trap_data->trap_items_arr);
944 kfree(nsim_dev->trap_data);
945}
946
947static int nsim_dev_reload_create(struct nsim_dev *nsim_dev,
948 struct netlink_ext_ack *extack);
949static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev);
950
951static int nsim_dev_reload_down(struct devlink *devlink, bool netns_change,
952 enum devlink_reload_action action, enum devlink_reload_limit limit,
953 struct netlink_ext_ack *extack)
954{
955 struct nsim_dev *nsim_dev = devlink_priv(devlink);
956
957 if (nsim_dev->dont_allow_reload) {
958 /* For testing purposes, user set debugfs dont_allow_reload
959 * value to true. So forbid it.
960 */
961 NL_SET_ERR_MSG_MOD(extack, "User forbid the reload for testing purposes");
962 return -EOPNOTSUPP;
963 }
964
965 nsim_dev_reload_destroy(nsim_dev);
966 return 0;
967}
968
969static int nsim_dev_reload_up(struct devlink *devlink, enum devlink_reload_action action,
970 enum devlink_reload_limit limit, u32 *actions_performed,
971 struct netlink_ext_ack *extack)
972{
973 struct nsim_dev *nsim_dev = devlink_priv(devlink);
974
975 if (nsim_dev->fail_reload) {
976 /* For testing purposes, user set debugfs fail_reload
977 * value to true. Fail right away.
978 */
979 NL_SET_ERR_MSG_MOD(extack, "User setup the reload to fail for testing purposes");
980 return -EINVAL;
981 }
982
983 *actions_performed = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT);
984
985 return nsim_dev_reload_create(nsim_dev, extack);
986}
987
988static int nsim_dev_info_get(struct devlink *devlink,
989 struct devlink_info_req *req,
990 struct netlink_ext_ack *extack)
991{
992 int err;
993
994 err = devlink_info_version_stored_put_ext(req, "fw.mgmt", "10.20.30",
995 DEVLINK_INFO_VERSION_TYPE_COMPONENT);
996 if (err)
997 return err;
998 return devlink_info_version_running_put_ext(req, "fw.mgmt", "10.20.30",
999 DEVLINK_INFO_VERSION_TYPE_COMPONENT);
1000}
1001
1002#define NSIM_DEV_FLASH_SIZE 500000
1003#define NSIM_DEV_FLASH_CHUNK_SIZE 1000
1004#define NSIM_DEV_FLASH_CHUNK_TIME_MS 10
1005
1006static int nsim_dev_flash_update(struct devlink *devlink,
1007 struct devlink_flash_update_params *params,
1008 struct netlink_ext_ack *extack)
1009{
1010 struct nsim_dev *nsim_dev = devlink_priv(devlink);
1011 int i;
1012
1013 if ((params->overwrite_mask & ~nsim_dev->fw_update_overwrite_mask) != 0)
1014 return -EOPNOTSUPP;
1015
1016 if (nsim_dev->fw_update_status) {
1017 devlink_flash_update_status_notify(devlink,
1018 "Preparing to flash",
1019 params->component, 0, 0);
1020 }
1021
1022 for (i = 0; i < NSIM_DEV_FLASH_SIZE / NSIM_DEV_FLASH_CHUNK_SIZE; i++) {
1023 if (nsim_dev->fw_update_status)
1024 devlink_flash_update_status_notify(devlink, "Flashing",
1025 params->component,
1026 i * NSIM_DEV_FLASH_CHUNK_SIZE,
1027 NSIM_DEV_FLASH_SIZE);
1028 msleep(NSIM_DEV_FLASH_CHUNK_TIME_MS);
1029 }
1030
1031 if (nsim_dev->fw_update_status) {
1032 devlink_flash_update_status_notify(devlink, "Flashing",
1033 params->component,
1034 NSIM_DEV_FLASH_SIZE,
1035 NSIM_DEV_FLASH_SIZE);
1036 devlink_flash_update_timeout_notify(devlink, "Flash select",
1037 params->component, 81);
1038 devlink_flash_update_status_notify(devlink, "Flashing done",
1039 params->component, 0, 0);
1040 }
1041
1042 return 0;
1043}
1044
1045static struct nsim_trap_item *
1046nsim_dev_trap_item_lookup(struct nsim_dev *nsim_dev, u16 trap_id)
1047{
1048 struct nsim_trap_data *nsim_trap_data = nsim_dev->trap_data;
1049 int i;
1050
1051 for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) {
1052 if (nsim_traps_arr[i].id == trap_id)
1053 return &nsim_trap_data->trap_items_arr[i];
1054 }
1055
1056 return NULL;
1057}
1058
1059static int nsim_dev_devlink_trap_init(struct devlink *devlink,
1060 const struct devlink_trap *trap,
1061 void *trap_ctx)
1062{
1063 struct nsim_dev *nsim_dev = devlink_priv(devlink);
1064 struct nsim_trap_item *nsim_trap_item;
1065
1066 nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id);
1067 if (WARN_ON(!nsim_trap_item))
1068 return -ENOENT;
1069
1070 nsim_trap_item->trap_ctx = trap_ctx;
1071 nsim_trap_item->action = trap->init_action;
1072
1073 return 0;
1074}
1075
1076static int
1077nsim_dev_devlink_trap_action_set(struct devlink *devlink,
1078 const struct devlink_trap *trap,
1079 enum devlink_trap_action action,
1080 struct netlink_ext_ack *extack)
1081{
1082 struct nsim_dev *nsim_dev = devlink_priv(devlink);
1083 struct nsim_trap_item *nsim_trap_item;
1084
1085 nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id);
1086 if (WARN_ON(!nsim_trap_item))
1087 return -ENOENT;
1088
1089 spin_lock(&nsim_dev->trap_data->trap_lock);
1090 nsim_trap_item->action = action;
1091 spin_unlock(&nsim_dev->trap_data->trap_lock);
1092
1093 return 0;
1094}
1095
1096static int
1097nsim_dev_devlink_trap_group_set(struct devlink *devlink,
1098 const struct devlink_trap_group *group,
1099 const struct devlink_trap_policer *policer,
1100 struct netlink_ext_ack *extack)
1101{
1102 struct nsim_dev *nsim_dev = devlink_priv(devlink);
1103
1104 if (nsim_dev->fail_trap_group_set)
1105 return -EINVAL;
1106
1107 return 0;
1108}
1109
1110static int
1111nsim_dev_devlink_trap_policer_set(struct devlink *devlink,
1112 const struct devlink_trap_policer *policer,
1113 u64 rate, u64 burst,
1114 struct netlink_ext_ack *extack)
1115{
1116 struct nsim_dev *nsim_dev = devlink_priv(devlink);
1117
1118 if (nsim_dev->fail_trap_policer_set) {
1119 NL_SET_ERR_MSG_MOD(extack, "User setup the operation to fail for testing purposes");
1120 return -EINVAL;
1121 }
1122
1123 return 0;
1124}
1125
1126static int
1127nsim_dev_devlink_trap_policer_counter_get(struct devlink *devlink,
1128 const struct devlink_trap_policer *policer,
1129 u64 *p_drops)
1130{
1131 struct nsim_dev *nsim_dev = devlink_priv(devlink);
1132 u64 *cnt;
1133
1134 if (nsim_dev->fail_trap_policer_counter_get)
1135 return -EINVAL;
1136
1137 cnt = &nsim_dev->trap_data->trap_policers_cnt_arr[policer->id - 1];
1138 *p_drops = (*cnt)++;
1139
1140 return 0;
1141}
1142
1143#define NSIM_LINK_SPEED_MAX 5000 /* Mbps */
1144#define NSIM_LINK_SPEED_UNIT 125000 /* 1 Mbps given in bytes/sec to avoid
1145 * u64 overflow during conversion from
1146 * bytes to bits.
1147 */
1148
1149static int nsim_rate_bytes_to_units(char *name, u64 *rate, struct netlink_ext_ack *extack)
1150{
1151 u64 val;
1152 u32 rem;
1153
1154 val = div_u64_rem(*rate, NSIM_LINK_SPEED_UNIT, &rem);
1155 if (rem) {
1156 pr_err("%s rate value %lluBps not in link speed units of 1Mbps.\n",
1157 name, *rate);
1158 NL_SET_ERR_MSG_MOD(extack, "TX rate value not in link speed units of 1Mbps.");
1159 return -EINVAL;
1160 }
1161
1162 if (val > NSIM_LINK_SPEED_MAX) {
1163 pr_err("%s rate value %lluMbps exceed link maximum speed 5000Mbps.\n",
1164 name, val);
1165 NL_SET_ERR_MSG_MOD(extack, "TX rate value exceed link maximum speed 5000Mbps.");
1166 return -EINVAL;
1167 }
1168 *rate = val;
1169 return 0;
1170}
1171
1172static int nsim_leaf_tx_share_set(struct devlink_rate *devlink_rate, void *priv,
1173 u64 tx_share, struct netlink_ext_ack *extack)
1174{
1175 struct nsim_dev_port *nsim_dev_port = priv;
1176 struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev;
1177 int vf_id = nsim_dev_port_index_to_vf_index(nsim_dev_port->port_index);
1178 int err;
1179
1180 err = nsim_rate_bytes_to_units("tx_share", &tx_share, extack);
1181 if (err)
1182 return err;
1183
1184 nsim_dev->vfconfigs[vf_id].min_tx_rate = tx_share;
1185 return 0;
1186}
1187
1188static int nsim_leaf_tx_max_set(struct devlink_rate *devlink_rate, void *priv,
1189 u64 tx_max, struct netlink_ext_ack *extack)
1190{
1191 struct nsim_dev_port *nsim_dev_port = priv;
1192 struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev;
1193 int vf_id = nsim_dev_port_index_to_vf_index(nsim_dev_port->port_index);
1194 int err;
1195
1196 err = nsim_rate_bytes_to_units("tx_max", &tx_max, extack);
1197 if (err)
1198 return err;
1199
1200 nsim_dev->vfconfigs[vf_id].max_tx_rate = tx_max;
1201 return 0;
1202}
1203
1204struct nsim_rate_node {
1205 struct dentry *ddir;
1206 struct dentry *rate_parent;
1207 char *parent_name;
1208 u16 tx_share;
1209 u16 tx_max;
1210};
1211
1212static int nsim_node_tx_share_set(struct devlink_rate *devlink_rate, void *priv,
1213 u64 tx_share, struct netlink_ext_ack *extack)
1214{
1215 struct nsim_rate_node *nsim_node = priv;
1216 int err;
1217
1218 err = nsim_rate_bytes_to_units("tx_share", &tx_share, extack);
1219 if (err)
1220 return err;
1221
1222 nsim_node->tx_share = tx_share;
1223 return 0;
1224}
1225
1226static int nsim_node_tx_max_set(struct devlink_rate *devlink_rate, void *priv,
1227 u64 tx_max, struct netlink_ext_ack *extack)
1228{
1229 struct nsim_rate_node *nsim_node = priv;
1230 int err;
1231
1232 err = nsim_rate_bytes_to_units("tx_max", &tx_max, extack);
1233 if (err)
1234 return err;
1235
1236 nsim_node->tx_max = tx_max;
1237 return 0;
1238}
1239
1240static int nsim_rate_node_new(struct devlink_rate *node, void **priv,
1241 struct netlink_ext_ack *extack)
1242{
1243 struct nsim_dev *nsim_dev = devlink_priv(node->devlink);
1244 struct nsim_rate_node *nsim_node;
1245
1246 if (!nsim_esw_mode_is_switchdev(nsim_dev)) {
1247 NL_SET_ERR_MSG_MOD(extack, "Node creation allowed only in switchdev mode.");
1248 return -EOPNOTSUPP;
1249 }
1250
1251 nsim_node = kzalloc(sizeof(*nsim_node), GFP_KERNEL);
1252 if (!nsim_node)
1253 return -ENOMEM;
1254
1255 nsim_node->ddir = debugfs_create_dir(node->name, nsim_dev->nodes_ddir);
1256
1257 debugfs_create_u16("tx_share", 0400, nsim_node->ddir, &nsim_node->tx_share);
1258 debugfs_create_u16("tx_max", 0400, nsim_node->ddir, &nsim_node->tx_max);
1259 nsim_node->rate_parent = debugfs_create_file("rate_parent", 0400,
1260 nsim_node->ddir,
1261 &nsim_node->parent_name,
1262 &nsim_dev_rate_parent_fops);
1263
1264 *priv = nsim_node;
1265 return 0;
1266}
1267
1268static int nsim_rate_node_del(struct devlink_rate *node, void *priv,
1269 struct netlink_ext_ack *extack)
1270{
1271 struct nsim_rate_node *nsim_node = priv;
1272
1273 debugfs_remove(nsim_node->rate_parent);
1274 debugfs_remove_recursive(nsim_node->ddir);
1275 kfree(nsim_node);
1276 return 0;
1277}
1278
1279static int nsim_rate_leaf_parent_set(struct devlink_rate *child,
1280 struct devlink_rate *parent,
1281 void *priv_child, void *priv_parent,
1282 struct netlink_ext_ack *extack)
1283{
1284 struct nsim_dev_port *nsim_dev_port = priv_child;
1285
1286 if (parent)
1287 nsim_dev_port->parent_name = parent->name;
1288 else
1289 nsim_dev_port->parent_name = NULL;
1290 return 0;
1291}
1292
1293static int nsim_rate_node_parent_set(struct devlink_rate *child,
1294 struct devlink_rate *parent,
1295 void *priv_child, void *priv_parent,
1296 struct netlink_ext_ack *extack)
1297{
1298 struct nsim_rate_node *nsim_node = priv_child;
1299
1300 if (parent)
1301 nsim_node->parent_name = parent->name;
1302 else
1303 nsim_node->parent_name = NULL;
1304 return 0;
1305}
1306
1307static int
1308nsim_dev_devlink_trap_drop_counter_get(struct devlink *devlink,
1309 const struct devlink_trap *trap,
1310 u64 *p_drops)
1311{
1312 struct nsim_dev *nsim_dev = devlink_priv(devlink);
1313 u64 *cnt;
1314
1315 if (nsim_dev->fail_trap_drop_counter_get)
1316 return -EINVAL;
1317
1318 cnt = &nsim_dev->trap_data->trap_pkt_cnt;
1319 *p_drops = (*cnt)++;
1320
1321 return 0;
1322}
1323
1324static const struct devlink_ops nsim_dev_devlink_ops = {
1325 .eswitch_mode_set = nsim_devlink_eswitch_mode_set,
1326 .eswitch_mode_get = nsim_devlink_eswitch_mode_get,
1327 .supported_flash_update_params = 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, NULL);
1399 if (err)
1400 goto err_nsim_destroy;
1401 }
1402
1403 list_add(&nsim_dev_port->list, &nsim_dev->port_list);
1404
1405 return 0;
1406
1407err_nsim_destroy:
1408 nsim_destroy(nsim_dev_port->ns);
1409err_port_debugfs_exit:
1410 nsim_dev_port_debugfs_exit(nsim_dev_port);
1411err_dl_port_unregister:
1412 devl_port_unregister(devlink_port);
1413err_port_free:
1414 kfree(nsim_dev_port);
1415 return err;
1416}
1417
1418static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port)
1419{
1420 struct devlink_port *devlink_port = &nsim_dev_port->devlink_port;
1421
1422 list_del(&nsim_dev_port->list);
1423 if (nsim_dev_port_is_vf(nsim_dev_port))
1424 devl_rate_leaf_destroy(&nsim_dev_port->devlink_port);
1425 nsim_destroy(nsim_dev_port->ns);
1426 nsim_dev_port_debugfs_exit(nsim_dev_port);
1427 devl_port_unregister(devlink_port);
1428 kfree(nsim_dev_port);
1429}
1430
1431static void nsim_dev_port_del_all(struct nsim_dev *nsim_dev)
1432{
1433 struct nsim_dev_port *nsim_dev_port, *tmp;
1434
1435 list_for_each_entry_safe(nsim_dev_port, tmp,
1436 &nsim_dev->port_list, list)
1437 __nsim_dev_port_del(nsim_dev_port);
1438}
1439
1440static int nsim_dev_port_add_all(struct nsim_dev *nsim_dev,
1441 unsigned int port_count)
1442{
1443 int i, err;
1444
1445 for (i = 0; i < port_count; i++) {
1446 err = __nsim_dev_port_add(nsim_dev, NSIM_DEV_PORT_TYPE_PF, i);
1447 if (err)
1448 goto err_port_del_all;
1449 }
1450 return 0;
1451
1452err_port_del_all:
1453 nsim_dev_port_del_all(nsim_dev);
1454 return err;
1455}
1456
1457static int nsim_dev_reload_create(struct nsim_dev *nsim_dev,
1458 struct netlink_ext_ack *extack)
1459{
1460 struct nsim_bus_dev *nsim_bus_dev = nsim_dev->nsim_bus_dev;
1461 struct devlink *devlink;
1462 int err;
1463
1464 devlink = priv_to_devlink(nsim_dev);
1465 nsim_dev = devlink_priv(devlink);
1466 INIT_LIST_HEAD(&nsim_dev->port_list);
1467 nsim_dev->fw_update_status = true;
1468 nsim_dev->fw_update_overwrite_mask = 0;
1469
1470 nsim_devlink_param_load_driverinit_values(devlink);
1471
1472 err = nsim_dev_dummy_region_init(nsim_dev, devlink);
1473 if (err)
1474 return err;
1475
1476 err = nsim_dev_traps_init(devlink);
1477 if (err)
1478 goto err_dummy_region_exit;
1479
1480 nsim_dev->fib_data = nsim_fib_create(devlink, extack);
1481 if (IS_ERR(nsim_dev->fib_data)) {
1482 err = PTR_ERR(nsim_dev->fib_data);
1483 goto err_traps_exit;
1484 }
1485
1486 err = nsim_dev_health_init(nsim_dev, devlink);
1487 if (err)
1488 goto err_fib_destroy;
1489
1490 err = nsim_dev_psample_init(nsim_dev);
1491 if (err)
1492 goto err_health_exit;
1493
1494 err = nsim_dev_hwstats_init(nsim_dev);
1495 if (err)
1496 goto err_psample_exit;
1497
1498 err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count);
1499 if (err)
1500 goto err_hwstats_exit;
1501
1502 nsim_dev->take_snapshot = debugfs_create_file("take_snapshot",
1503 0200,
1504 nsim_dev->ddir,
1505 nsim_dev,
1506 &nsim_dev_take_snapshot_fops);
1507 return 0;
1508
1509err_hwstats_exit:
1510 nsim_dev_hwstats_exit(nsim_dev);
1511err_psample_exit:
1512 nsim_dev_psample_exit(nsim_dev);
1513err_health_exit:
1514 nsim_dev_health_exit(nsim_dev);
1515err_fib_destroy:
1516 nsim_fib_destroy(devlink, nsim_dev->fib_data);
1517err_traps_exit:
1518 nsim_dev_traps_exit(devlink);
1519err_dummy_region_exit:
1520 nsim_dev_dummy_region_exit(nsim_dev);
1521 return err;
1522}
1523
1524int nsim_drv_probe(struct nsim_bus_dev *nsim_bus_dev)
1525{
1526 struct nsim_dev *nsim_dev;
1527 struct devlink *devlink;
1528 int err;
1529
1530 devlink = devlink_alloc_ns(&nsim_dev_devlink_ops, sizeof(*nsim_dev),
1531 nsim_bus_dev->initial_net, &nsim_bus_dev->dev);
1532 if (!devlink)
1533 return -ENOMEM;
1534 devl_lock(devlink);
1535 nsim_dev = devlink_priv(devlink);
1536 nsim_dev->nsim_bus_dev = nsim_bus_dev;
1537 nsim_dev->switch_id.id_len = sizeof(nsim_dev->switch_id.id);
1538 get_random_bytes(nsim_dev->switch_id.id, nsim_dev->switch_id.id_len);
1539 INIT_LIST_HEAD(&nsim_dev->port_list);
1540 nsim_dev->fw_update_status = true;
1541 nsim_dev->fw_update_overwrite_mask = 0;
1542 nsim_dev->max_macs = NSIM_DEV_MAX_MACS_DEFAULT;
1543 nsim_dev->test1 = NSIM_DEV_TEST1_DEFAULT;
1544 spin_lock_init(&nsim_dev->fa_cookie_lock);
1545
1546 dev_set_drvdata(&nsim_bus_dev->dev, nsim_dev);
1547
1548 nsim_dev->vfconfigs = kcalloc(nsim_bus_dev->max_vfs,
1549 sizeof(struct nsim_vf_config),
1550 GFP_KERNEL | __GFP_NOWARN);
1551 if (!nsim_dev->vfconfigs) {
1552 err = -ENOMEM;
1553 goto err_devlink_unlock;
1554 }
1555
1556 err = devl_register(devlink);
1557 if (err)
1558 goto err_vfc_free;
1559
1560 err = nsim_dev_resources_register(devlink);
1561 if (err)
1562 goto err_dl_unregister;
1563
1564 err = devl_params_register(devlink, nsim_devlink_params,
1565 ARRAY_SIZE(nsim_devlink_params));
1566 if (err)
1567 goto err_resource_unregister;
1568 nsim_devlink_set_params_init_values(nsim_dev, devlink);
1569
1570 err = nsim_dev_dummy_region_init(nsim_dev, devlink);
1571 if (err)
1572 goto err_params_unregister;
1573
1574 err = nsim_dev_traps_init(devlink);
1575 if (err)
1576 goto err_dummy_region_exit;
1577
1578 err = nsim_dev_debugfs_init(nsim_dev);
1579 if (err)
1580 goto err_traps_exit;
1581
1582 nsim_dev->fib_data = nsim_fib_create(devlink, NULL);
1583 if (IS_ERR(nsim_dev->fib_data)) {
1584 err = PTR_ERR(nsim_dev->fib_data);
1585 goto err_debugfs_exit;
1586 }
1587
1588 err = nsim_dev_health_init(nsim_dev, devlink);
1589 if (err)
1590 goto err_fib_destroy;
1591
1592 err = nsim_bpf_dev_init(nsim_dev);
1593 if (err)
1594 goto err_health_exit;
1595
1596 err = nsim_dev_psample_init(nsim_dev);
1597 if (err)
1598 goto err_bpf_dev_exit;
1599
1600 err = nsim_dev_hwstats_init(nsim_dev);
1601 if (err)
1602 goto err_psample_exit;
1603
1604 err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count);
1605 if (err)
1606 goto err_hwstats_exit;
1607
1608 nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_LEGACY;
1609 devl_unlock(devlink);
1610 return 0;
1611
1612err_hwstats_exit:
1613 nsim_dev_hwstats_exit(nsim_dev);
1614err_psample_exit:
1615 nsim_dev_psample_exit(nsim_dev);
1616err_bpf_dev_exit:
1617 nsim_bpf_dev_exit(nsim_dev);
1618err_health_exit:
1619 nsim_dev_health_exit(nsim_dev);
1620err_fib_destroy:
1621 nsim_fib_destroy(devlink, nsim_dev->fib_data);
1622err_debugfs_exit:
1623 nsim_dev_debugfs_exit(nsim_dev);
1624err_traps_exit:
1625 nsim_dev_traps_exit(devlink);
1626err_dummy_region_exit:
1627 nsim_dev_dummy_region_exit(nsim_dev);
1628err_params_unregister:
1629 devl_params_unregister(devlink, nsim_devlink_params,
1630 ARRAY_SIZE(nsim_devlink_params));
1631err_resource_unregister:
1632 devl_resources_unregister(devlink);
1633err_dl_unregister:
1634 devl_unregister(devlink);
1635err_vfc_free:
1636 kfree(nsim_dev->vfconfigs);
1637err_devlink_unlock:
1638 devl_unlock(devlink);
1639 devlink_free(devlink);
1640 dev_set_drvdata(&nsim_bus_dev->dev, NULL);
1641 return err;
1642}
1643
1644static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev)
1645{
1646 struct devlink *devlink = priv_to_devlink(nsim_dev);
1647
1648 if (devlink_is_reload_failed(devlink))
1649 return;
1650 debugfs_remove(nsim_dev->take_snapshot);
1651
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
1658 nsim_dev_port_del_all(nsim_dev);
1659 nsim_dev_hwstats_exit(nsim_dev);
1660 nsim_dev_psample_exit(nsim_dev);
1661 nsim_dev_health_exit(nsim_dev);
1662 nsim_fib_destroy(devlink, nsim_dev->fib_data);
1663 nsim_dev_traps_exit(devlink);
1664 nsim_dev_dummy_region_exit(nsim_dev);
1665}
1666
1667void nsim_drv_remove(struct nsim_bus_dev *nsim_bus_dev)
1668{
1669 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
1670 struct devlink *devlink = priv_to_devlink(nsim_dev);
1671
1672 devl_lock(devlink);
1673 nsim_dev_reload_destroy(nsim_dev);
1674
1675 nsim_bpf_dev_exit(nsim_dev);
1676 nsim_dev_debugfs_exit(nsim_dev);
1677 devl_params_unregister(devlink, nsim_devlink_params,
1678 ARRAY_SIZE(nsim_devlink_params));
1679 devl_resources_unregister(devlink);
1680 devl_unregister(devlink);
1681 kfree(nsim_dev->vfconfigs);
1682 kfree(nsim_dev->fa_cookie);
1683 devl_unlock(devlink);
1684 devlink_free(devlink);
1685 dev_set_drvdata(&nsim_bus_dev->dev, NULL);
1686}
1687
1688static struct nsim_dev_port *
1689__nsim_dev_port_lookup(struct nsim_dev *nsim_dev, enum nsim_dev_port_type type,
1690 unsigned int port_index)
1691{
1692 struct nsim_dev_port *nsim_dev_port;
1693
1694 port_index = nsim_dev_port_index(type, port_index);
1695 list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list)
1696 if (nsim_dev_port->port_index == port_index)
1697 return nsim_dev_port;
1698 return NULL;
1699}
1700
1701int nsim_drv_port_add(struct nsim_bus_dev *nsim_bus_dev, enum nsim_dev_port_type type,
1702 unsigned int port_index)
1703{
1704 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
1705 int err;
1706
1707 devl_lock(priv_to_devlink(nsim_dev));
1708 if (__nsim_dev_port_lookup(nsim_dev, type, port_index))
1709 err = -EEXIST;
1710 else
1711 err = __nsim_dev_port_add(nsim_dev, type, port_index);
1712 devl_unlock(priv_to_devlink(nsim_dev));
1713 return err;
1714}
1715
1716int nsim_drv_port_del(struct nsim_bus_dev *nsim_bus_dev, enum nsim_dev_port_type type,
1717 unsigned int port_index)
1718{
1719 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
1720 struct nsim_dev_port *nsim_dev_port;
1721 int err = 0;
1722
1723 devl_lock(priv_to_devlink(nsim_dev));
1724 nsim_dev_port = __nsim_dev_port_lookup(nsim_dev, type, port_index);
1725 if (!nsim_dev_port)
1726 err = -ENOENT;
1727 else
1728 __nsim_dev_port_del(nsim_dev_port);
1729 devl_unlock(priv_to_devlink(nsim_dev));
1730 return err;
1731}
1732
1733int nsim_drv_configure_vfs(struct nsim_bus_dev *nsim_bus_dev,
1734 unsigned int num_vfs)
1735{
1736 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
1737 struct devlink *devlink = priv_to_devlink(nsim_dev);
1738 int ret = 0;
1739
1740 devl_lock(devlink);
1741 if (nsim_bus_dev->num_vfs == num_vfs)
1742 goto exit_unlock;
1743 if (nsim_bus_dev->num_vfs && num_vfs) {
1744 ret = -EBUSY;
1745 goto exit_unlock;
1746 }
1747 if (nsim_bus_dev->max_vfs < num_vfs) {
1748 ret = -ENOMEM;
1749 goto exit_unlock;
1750 }
1751
1752 nsim_bus_dev_set_vfs(nsim_bus_dev, num_vfs);
1753 if (nsim_esw_mode_is_switchdev(nsim_dev)) {
1754 if (num_vfs) {
1755 ret = nsim_esw_switchdev_enable(nsim_dev, NULL);
1756 if (ret) {
1757 nsim_bus_dev_set_vfs(nsim_bus_dev, 0);
1758 goto exit_unlock;
1759 }
1760 } else {
1761 nsim_esw_legacy_enable(nsim_dev, NULL);
1762 }
1763 }
1764
1765exit_unlock:
1766 devl_unlock(devlink);
1767
1768 return ret;
1769}
1770
1771int nsim_dev_init(void)
1772{
1773 nsim_dev_ddir = debugfs_create_dir(DRV_NAME, NULL);
1774 return PTR_ERR_OR_ZERO(nsim_dev_ddir);
1775}
1776
1777void nsim_dev_exit(void)
1778{
1779 debugfs_remove_recursive(nsim_dev_ddir);
1780}