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1/*
2 * Copyright (c) 2018 Cumulus Networks. All rights reserved.
3 * Copyright (c) 2018 David Ahern <dsa@cumulusnetworks.com>
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(buf: 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(priv: nsim_dev);
107
108 err = nsim_dev_take_snapshot(devlink, NULL, NULL, data: &dummy_data);
109 if (err)
110 return err;
111
112 err = devlink_region_snapshot_id_get(devlink, id: &id);
113 if (err) {
114 pr_err("Failed to get snapshot id\n");
115 kfree(objp: dummy_data);
116 return err;
117 }
118 err = devlink_region_snapshot_create(region: nsim_dev->dummy_region,
119 data: dummy_data, snapshot_id: id);
120 devlink_region_snapshot_id_put(devlink, id);
121 if (err) {
122 pr_err("Failed to create region snapshot\n");
123 kfree(objp: 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(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(dst: buf, src: fa_cookie->cookie, count: fa_cookie->cookie_len);
160 spin_unlock(lock: &nsim_dev->fa_cookie_lock);
161
162 ret = simple_read_from_buffer(to: data, count, ppos, from: buf, available: buf_len);
163
164 kfree(objp: buf);
165 return ret;
166
167errout:
168 spin_unlock(lock: &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(ptr: buf))
190 return PTR_ERR(ptr: 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(dst: fa_cookie->cookie, src: buf, count: cookie_len);
201 if (ret)
202 goto free_fa_cookie;
203 kfree(objp: buf);
204
205 spin_lock(lock: &nsim_dev->fa_cookie_lock);
206 kfree(objp: nsim_dev->fa_cookie);
207 nsim_dev->fa_cookie = fa_cookie;
208 spin_unlock(lock: &nsim_dev->fa_cookie_lock);
209
210 return count;
211
212free_fa_cookie:
213 kfree(objp: fa_cookie);
214free_buf:
215 kfree(objp: 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, size: sizeof(buf), fmt: "%u\n",
235 READ_ONCE(nsim_dev->nsim_bus_dev->max_vfs));
236
237 return simple_read_from_buffer(to: data, count, ppos, from: buf, available: 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(to: buf, from: data, n: count);
257 if (ret)
258 return -EFAULT;
259 buf[count] = '\0';
260
261 ret = kstrtouint(s: buf, base: 10, res: &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(devlink: priv_to_devlink(priv: 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(devlink: priv_to_devlink(priv: nsim_dev));
286
287 kfree(objp: 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(buf: dev_ddir_name, DRV_NAME "%u", nsim_dev->nsim_bus_dev->dev.id);
305 nsim_dev->ddir = debugfs_create_dir(name: dev_ddir_name, parent: nsim_dev_ddir);
306 if (IS_ERR(ptr: nsim_dev->ddir))
307 return PTR_ERR(ptr: nsim_dev->ddir);
308 nsim_dev->ports_ddir = debugfs_create_dir(name: "ports", parent: nsim_dev->ddir);
309 if (IS_ERR(ptr: nsim_dev->ports_ddir)) {
310 err = PTR_ERR(ptr: nsim_dev->ports_ddir);
311 goto err_ddir;
312 }
313 debugfs_create_bool(name: "fw_update_status", mode: 0600, parent: nsim_dev->ddir,
314 value: &nsim_dev->fw_update_status);
315 debugfs_create_u32(name: "fw_update_overwrite_mask", mode: 0600, parent: nsim_dev->ddir,
316 value: &nsim_dev->fw_update_overwrite_mask);
317 debugfs_create_u32(name: "fw_update_flash_chunk_time_ms", mode: 0600, parent: nsim_dev->ddir,
318 value: &nsim_dev->fw_update_flash_chunk_time_ms);
319 debugfs_create_u32(name: "max_macs", mode: 0600, parent: nsim_dev->ddir,
320 value: &nsim_dev->max_macs);
321 debugfs_create_bool(name: "test1", mode: 0600, parent: nsim_dev->ddir,
322 value: &nsim_dev->test1);
323 debugfs_create_u32(name: "test2", mode: 0600, parent: nsim_dev->ddir,
324 value: &nsim_dev->test2);
325 nsim_dev->take_snapshot = debugfs_create_file("take_snapshot",
326 0200,
327 nsim_dev->ddir,
328 nsim_dev,
329 &nsim_dev_take_snapshot_fops);
330 debugfs_create_bool(name: "dont_allow_reload", mode: 0600, parent: nsim_dev->ddir,
331 value: &nsim_dev->dont_allow_reload);
332 debugfs_create_bool(name: "fail_reload", mode: 0600, parent: nsim_dev->ddir,
333 value: &nsim_dev->fail_reload);
334 debugfs_create_file("trap_flow_action_cookie", 0600, nsim_dev->ddir,
335 nsim_dev, &nsim_dev_trap_fa_cookie_fops);
336 debugfs_create_bool(name: "fail_trap_group_set", mode: 0600,
337 parent: nsim_dev->ddir,
338 value: &nsim_dev->fail_trap_group_set);
339 debugfs_create_bool(name: "fail_trap_policer_set", mode: 0600,
340 parent: nsim_dev->ddir,
341 value: &nsim_dev->fail_trap_policer_set);
342 debugfs_create_bool(name: "fail_trap_policer_counter_get", mode: 0600,
343 parent: nsim_dev->ddir,
344 value: &nsim_dev->fail_trap_policer_counter_get);
345 /* caution, dev_max_vfs write takes devlink lock */
346 debugfs_create_file("max_vfs", 0600, nsim_dev->ddir,
347 nsim_dev, &nsim_dev_max_vfs_fops);
348
349 nsim_dev->nodes_ddir = debugfs_create_dir(name: "rate_nodes", parent: nsim_dev->ddir);
350 if (IS_ERR(ptr: nsim_dev->nodes_ddir)) {
351 err = PTR_ERR(ptr: nsim_dev->nodes_ddir);
352 goto err_ports_ddir;
353 }
354 debugfs_create_bool(name: "fail_trap_drop_counter_get", mode: 0600,
355 parent: nsim_dev->ddir,
356 value: &nsim_dev->fail_trap_drop_counter_get);
357 nsim_udp_tunnels_debugfs_create(nsim_dev);
358 return 0;
359
360err_ports_ddir:
361 debugfs_remove_recursive(dentry: nsim_dev->ports_ddir);
362err_ddir:
363 debugfs_remove_recursive(dentry: nsim_dev->ddir);
364 return err;
365}
366
367static void nsim_dev_debugfs_exit(struct nsim_dev *nsim_dev)
368{
369 debugfs_remove_recursive(dentry: nsim_dev->nodes_ddir);
370 debugfs_remove_recursive(dentry: nsim_dev->ports_ddir);
371 debugfs_remove_recursive(dentry: nsim_dev->ddir);
372}
373
374static ssize_t nsim_dev_rate_parent_read(struct file *file,
375 char __user *data,
376 size_t count, loff_t *ppos)
377{
378 char **name_ptr = file->private_data;
379 size_t len;
380
381 if (!*name_ptr)
382 return 0;
383
384 len = strlen(*name_ptr);
385 return simple_read_from_buffer(to: data, count, ppos, from: *name_ptr, available: len);
386}
387
388static const struct file_operations nsim_dev_rate_parent_fops = {
389 .open = simple_open,
390 .read = nsim_dev_rate_parent_read,
391 .llseek = generic_file_llseek,
392 .owner = THIS_MODULE,
393};
394
395static void nsim_dev_tc_bw_debugfs_init(struct dentry *ddir, u32 *tc_bw)
396{
397 int i;
398
399 for (i = 0; i < DEVLINK_RATE_TCS_MAX; i++) {
400 char name[16];
401
402 snprintf(buf: name, size: sizeof(name), fmt: "tc%d_bw", i);
403 debugfs_create_u32(name, mode: 0400, parent: ddir, value: &tc_bw[i]);
404 }
405}
406static int nsim_dev_port_debugfs_init(struct nsim_dev *nsim_dev,
407 struct nsim_dev_port *nsim_dev_port)
408{
409 struct nsim_bus_dev *nsim_bus_dev = nsim_dev->nsim_bus_dev;
410 unsigned int port_index = nsim_dev_port->port_index;
411 char port_ddir_name[16];
412 char dev_link_name[32];
413
414 sprintf(buf: port_ddir_name, fmt: "%u", port_index);
415 nsim_dev_port->ddir = debugfs_create_dir(name: port_ddir_name,
416 parent: nsim_dev->ports_ddir);
417 if (IS_ERR(ptr: nsim_dev_port->ddir))
418 return PTR_ERR(ptr: nsim_dev_port->ddir);
419
420 sprintf(buf: dev_link_name, fmt: "../../../" DRV_NAME "%u", nsim_bus_dev->dev.id);
421 if (nsim_dev_port_is_vf(nsim_dev_port)) {
422 unsigned int vf_id = nsim_dev_port_index_to_vf_index(port_index);
423
424 debugfs_create_u16(name: "tx_share", mode: 0400, parent: nsim_dev_port->ddir,
425 value: &nsim_dev->vfconfigs[vf_id].min_tx_rate);
426 debugfs_create_u16(name: "tx_max", mode: 0400, parent: nsim_dev_port->ddir,
427 value: &nsim_dev->vfconfigs[vf_id].max_tx_rate);
428 nsim_dev_port->rate_parent = debugfs_create_file("rate_parent",
429 0400,
430 nsim_dev_port->ddir,
431 &nsim_dev_port->parent_name,
432 &nsim_dev_rate_parent_fops);
433 nsim_dev_tc_bw_debugfs_init(ddir: nsim_dev_port->ddir,
434 tc_bw: nsim_dev_port->tc_bw);
435 }
436 debugfs_create_symlink(name: "dev", parent: nsim_dev_port->ddir, dest: dev_link_name);
437
438 return 0;
439}
440
441static void nsim_dev_port_debugfs_exit(struct nsim_dev_port *nsim_dev_port)
442{
443 debugfs_remove_recursive(dentry: nsim_dev_port->ddir);
444}
445
446static int nsim_dev_resources_register(struct devlink *devlink)
447{
448 struct devlink_resource_size_params params = {
449 .size_max = (u64)-1,
450 .size_granularity = 1,
451 .unit = DEVLINK_RESOURCE_UNIT_ENTRY
452 };
453 int err;
454
455 /* Resources for IPv4 */
456 err = devl_resource_register(devlink, resource_name: "IPv4", resource_size: (u64)-1,
457 resource_id: NSIM_RESOURCE_IPV4,
458 DEVLINK_RESOURCE_ID_PARENT_TOP,
459 size_params: &params);
460 if (err) {
461 pr_err("Failed to register IPv4 top resource\n");
462 goto err_out;
463 }
464
465 err = devl_resource_register(devlink, resource_name: "fib", resource_size: (u64)-1,
466 resource_id: NSIM_RESOURCE_IPV4_FIB,
467 parent_resource_id: NSIM_RESOURCE_IPV4, size_params: &params);
468 if (err) {
469 pr_err("Failed to register IPv4 FIB resource\n");
470 goto err_out;
471 }
472
473 err = devl_resource_register(devlink, resource_name: "fib-rules", resource_size: (u64)-1,
474 resource_id: NSIM_RESOURCE_IPV4_FIB_RULES,
475 parent_resource_id: NSIM_RESOURCE_IPV4, size_params: &params);
476 if (err) {
477 pr_err("Failed to register IPv4 FIB rules resource\n");
478 goto err_out;
479 }
480
481 /* Resources for IPv6 */
482 err = devl_resource_register(devlink, resource_name: "IPv6", resource_size: (u64)-1,
483 resource_id: NSIM_RESOURCE_IPV6,
484 DEVLINK_RESOURCE_ID_PARENT_TOP,
485 size_params: &params);
486 if (err) {
487 pr_err("Failed to register IPv6 top resource\n");
488 goto err_out;
489 }
490
491 err = devl_resource_register(devlink, resource_name: "fib", resource_size: (u64)-1,
492 resource_id: NSIM_RESOURCE_IPV6_FIB,
493 parent_resource_id: NSIM_RESOURCE_IPV6, size_params: &params);
494 if (err) {
495 pr_err("Failed to register IPv6 FIB resource\n");
496 goto err_out;
497 }
498
499 err = devl_resource_register(devlink, resource_name: "fib-rules", resource_size: (u64)-1,
500 resource_id: NSIM_RESOURCE_IPV6_FIB_RULES,
501 parent_resource_id: NSIM_RESOURCE_IPV6, size_params: &params);
502 if (err) {
503 pr_err("Failed to register IPv6 FIB rules resource\n");
504 goto err_out;
505 }
506
507 /* Resources for nexthops */
508 err = devl_resource_register(devlink, resource_name: "nexthops", resource_size: (u64)-1,
509 resource_id: NSIM_RESOURCE_NEXTHOPS,
510 DEVLINK_RESOURCE_ID_PARENT_TOP,
511 size_params: &params);
512 if (err) {
513 pr_err("Failed to register NEXTHOPS resource\n");
514 goto err_out;
515 }
516 return 0;
517
518err_out:
519 devl_resources_unregister(devlink);
520 return err;
521}
522
523enum nsim_devlink_param_id {
524 NSIM_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX,
525 NSIM_DEVLINK_PARAM_ID_TEST1,
526 NSIM_DEVLINK_PARAM_ID_TEST2,
527};
528
529static int
530nsim_devlink_param_test2_get(struct devlink *devlink, u32 id,
531 struct devlink_param_gset_ctx *ctx,
532 struct netlink_ext_ack *extack)
533{
534 struct nsim_dev *nsim_dev = devlink_priv(devlink);
535
536 ctx->val.vu32 = nsim_dev->test2;
537 return 0;
538}
539
540static int
541nsim_devlink_param_test2_set(struct devlink *devlink, u32 id,
542 struct devlink_param_gset_ctx *ctx,
543 struct netlink_ext_ack *extack)
544{
545 struct nsim_dev *nsim_dev = devlink_priv(devlink);
546
547 nsim_dev->test2 = ctx->val.vu32;
548 return 0;
549}
550
551#define NSIM_DEV_TEST2_DEFAULT 1234
552
553static int
554nsim_devlink_param_test2_get_default(struct devlink *devlink, u32 id,
555 struct devlink_param_gset_ctx *ctx,
556 struct netlink_ext_ack *extack)
557{
558 ctx->val.vu32 = NSIM_DEV_TEST2_DEFAULT;
559 return 0;
560}
561
562static int
563nsim_devlink_param_test2_reset_default(struct devlink *devlink, u32 id,
564 enum devlink_param_cmode cmode,
565 struct netlink_ext_ack *extack)
566{
567 struct nsim_dev *nsim_dev = devlink_priv(devlink);
568
569 nsim_dev->test2 = NSIM_DEV_TEST2_DEFAULT;
570 return 0;
571}
572
573static const struct devlink_param nsim_devlink_params[] = {
574 DEVLINK_PARAM_GENERIC(MAX_MACS,
575 BIT(DEVLINK_PARAM_CMODE_DRIVERINIT),
576 NULL, NULL, NULL),
577 DEVLINK_PARAM_DRIVER(NSIM_DEVLINK_PARAM_ID_TEST1,
578 "test1", DEVLINK_PARAM_TYPE_BOOL,
579 BIT(DEVLINK_PARAM_CMODE_DRIVERINIT),
580 NULL, NULL, NULL),
581 DEVLINK_PARAM_DRIVER_WITH_DEFAULTS(NSIM_DEVLINK_PARAM_ID_TEST2,
582 "test2", DEVLINK_PARAM_TYPE_U32,
583 BIT(DEVLINK_PARAM_CMODE_RUNTIME),
584 nsim_devlink_param_test2_get,
585 nsim_devlink_param_test2_set,
586 NULL,
587 nsim_devlink_param_test2_get_default,
588 nsim_devlink_param_test2_reset_default),
589};
590
591static void nsim_devlink_set_params_init_values(struct nsim_dev *nsim_dev,
592 struct devlink *devlink)
593{
594 union devlink_param_value value;
595
596 value.vu32 = nsim_dev->max_macs;
597 devl_param_driverinit_value_set(devlink,
598 param_id: DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
599 init_val: value);
600 value.vbool = nsim_dev->test1;
601 devl_param_driverinit_value_set(devlink,
602 param_id: NSIM_DEVLINK_PARAM_ID_TEST1,
603 init_val: value);
604}
605
606static void nsim_devlink_param_load_driverinit_values(struct devlink *devlink)
607{
608 struct nsim_dev *nsim_dev = devlink_priv(devlink);
609 union devlink_param_value saved_value;
610 int err;
611
612 err = devl_param_driverinit_value_get(devlink,
613 param_id: DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
614 val: &saved_value);
615 if (!err)
616 nsim_dev->max_macs = saved_value.vu32;
617 err = devl_param_driverinit_value_get(devlink,
618 param_id: NSIM_DEVLINK_PARAM_ID_TEST1,
619 val: &saved_value);
620 if (!err)
621 nsim_dev->test1 = saved_value.vbool;
622}
623
624#define NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX 16
625
626static const struct devlink_region_ops dummy_region_ops = {
627 .name = "dummy",
628 .destructor = &kfree,
629 .snapshot = nsim_dev_take_snapshot,
630};
631
632static int nsim_dev_dummy_region_init(struct nsim_dev *nsim_dev,
633 struct devlink *devlink)
634{
635 nsim_dev->dummy_region =
636 devl_region_create(devlink, ops: &dummy_region_ops,
637 NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX,
638 NSIM_DEV_DUMMY_REGION_SIZE);
639 return PTR_ERR_OR_ZERO(ptr: nsim_dev->dummy_region);
640}
641
642static void nsim_dev_dummy_region_exit(struct nsim_dev *nsim_dev)
643{
644 devl_region_destroy(region: nsim_dev->dummy_region);
645}
646
647static int
648__nsim_dev_port_add(struct nsim_dev *nsim_dev, enum nsim_dev_port_type type,
649 unsigned int port_index, u8 perm_addr[ETH_ALEN]);
650static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port);
651
652static int nsim_esw_legacy_enable(struct nsim_dev *nsim_dev,
653 struct netlink_ext_ack *extack)
654{
655 struct devlink *devlink = priv_to_devlink(priv: nsim_dev);
656 struct nsim_dev_port *nsim_dev_port, *tmp;
657
658 devl_rate_nodes_destroy(devlink);
659 list_for_each_entry_safe(nsim_dev_port, tmp, &nsim_dev->port_list, list)
660 if (nsim_dev_port_is_vf(nsim_dev_port))
661 __nsim_dev_port_del(nsim_dev_port);
662 nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_LEGACY;
663 return 0;
664}
665
666static int nsim_esw_switchdev_enable(struct nsim_dev *nsim_dev,
667 struct netlink_ext_ack *extack)
668{
669 struct nsim_dev_port *nsim_dev_port, *tmp;
670 int i, err;
671
672 for (i = 0; i < nsim_dev_get_vfs(nsim_dev); i++) {
673 err = __nsim_dev_port_add(nsim_dev, type: NSIM_DEV_PORT_TYPE_VF, port_index: i, NULL);
674 if (err) {
675 NL_SET_ERR_MSG_MOD(extack, "Failed to initialize VFs' netdevsim ports");
676 pr_err("Failed to initialize VF id=%d. %d.\n", i, err);
677 goto err_port_add_vfs;
678 }
679 }
680 nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_SWITCHDEV;
681 return 0;
682
683err_port_add_vfs:
684 list_for_each_entry_safe(nsim_dev_port, tmp, &nsim_dev->port_list, list)
685 if (nsim_dev_port_is_vf(nsim_dev_port))
686 __nsim_dev_port_del(nsim_dev_port);
687 return err;
688}
689
690static int nsim_devlink_eswitch_mode_set(struct devlink *devlink, u16 mode,
691 struct netlink_ext_ack *extack)
692{
693 struct nsim_dev *nsim_dev = devlink_priv(devlink);
694
695 if (mode == nsim_dev->esw_mode)
696 return 0;
697
698 if (mode == DEVLINK_ESWITCH_MODE_LEGACY)
699 return nsim_esw_legacy_enable(nsim_dev, extack);
700 if (mode == DEVLINK_ESWITCH_MODE_SWITCHDEV)
701 return nsim_esw_switchdev_enable(nsim_dev, extack);
702
703 return -EINVAL;
704}
705
706static int nsim_devlink_eswitch_mode_get(struct devlink *devlink, u16 *mode)
707{
708 struct nsim_dev *nsim_dev = devlink_priv(devlink);
709
710 *mode = nsim_dev->esw_mode;
711 return 0;
712}
713
714struct nsim_trap_item {
715 void *trap_ctx;
716 enum devlink_trap_action action;
717};
718
719struct nsim_trap_data {
720 struct delayed_work trap_report_dw;
721 struct nsim_trap_item *trap_items_arr;
722 u64 *trap_policers_cnt_arr;
723 u64 trap_pkt_cnt;
724 struct nsim_dev *nsim_dev;
725 spinlock_t trap_lock; /* Protects trap_items_arr */
726};
727
728/* All driver-specific traps must be documented in
729 * Documentation/networking/devlink/netdevsim.rst
730 */
731enum {
732 NSIM_TRAP_ID_BASE = DEVLINK_TRAP_GENERIC_ID_MAX,
733 NSIM_TRAP_ID_FID_MISS,
734};
735
736#define NSIM_TRAP_NAME_FID_MISS "fid_miss"
737
738#define NSIM_TRAP_METADATA DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT
739
740#define NSIM_TRAP_DROP(_id, _group_id) \
741 DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \
742 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \
743 NSIM_TRAP_METADATA)
744#define NSIM_TRAP_DROP_EXT(_id, _group_id, _metadata) \
745 DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \
746 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \
747 NSIM_TRAP_METADATA | (_metadata))
748#define NSIM_TRAP_EXCEPTION(_id, _group_id) \
749 DEVLINK_TRAP_GENERIC(EXCEPTION, TRAP, _id, \
750 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \
751 NSIM_TRAP_METADATA)
752#define NSIM_TRAP_CONTROL(_id, _group_id, _action) \
753 DEVLINK_TRAP_GENERIC(CONTROL, _action, _id, \
754 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \
755 NSIM_TRAP_METADATA)
756#define NSIM_TRAP_DRIVER_EXCEPTION(_id, _group_id) \
757 DEVLINK_TRAP_DRIVER(EXCEPTION, TRAP, NSIM_TRAP_ID_##_id, \
758 NSIM_TRAP_NAME_##_id, \
759 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \
760 NSIM_TRAP_METADATA)
761
762#define NSIM_DEV_TRAP_POLICER_MIN_RATE 1
763#define NSIM_DEV_TRAP_POLICER_MAX_RATE 8000
764#define NSIM_DEV_TRAP_POLICER_MIN_BURST 8
765#define NSIM_DEV_TRAP_POLICER_MAX_BURST 65536
766
767#define NSIM_TRAP_POLICER(_id, _rate, _burst) \
768 DEVLINK_TRAP_POLICER(_id, _rate, _burst, \
769 NSIM_DEV_TRAP_POLICER_MAX_RATE, \
770 NSIM_DEV_TRAP_POLICER_MIN_RATE, \
771 NSIM_DEV_TRAP_POLICER_MAX_BURST, \
772 NSIM_DEV_TRAP_POLICER_MIN_BURST)
773
774static const struct devlink_trap_policer nsim_trap_policers_arr[] = {
775 NSIM_TRAP_POLICER(1, 1000, 128),
776 NSIM_TRAP_POLICER(2, 2000, 256),
777 NSIM_TRAP_POLICER(3, 3000, 512),
778};
779
780static const struct devlink_trap_group nsim_trap_groups_arr[] = {
781 DEVLINK_TRAP_GROUP_GENERIC(L2_DROPS, 0),
782 DEVLINK_TRAP_GROUP_GENERIC(L3_DROPS, 1),
783 DEVLINK_TRAP_GROUP_GENERIC(L3_EXCEPTIONS, 1),
784 DEVLINK_TRAP_GROUP_GENERIC(BUFFER_DROPS, 2),
785 DEVLINK_TRAP_GROUP_GENERIC(ACL_DROPS, 3),
786 DEVLINK_TRAP_GROUP_GENERIC(MC_SNOOPING, 3),
787};
788
789static const struct devlink_trap nsim_traps_arr[] = {
790 NSIM_TRAP_DROP(SMAC_MC, L2_DROPS),
791 NSIM_TRAP_DROP(VLAN_TAG_MISMATCH, L2_DROPS),
792 NSIM_TRAP_DROP(INGRESS_VLAN_FILTER, L2_DROPS),
793 NSIM_TRAP_DROP(INGRESS_STP_FILTER, L2_DROPS),
794 NSIM_TRAP_DROP(EMPTY_TX_LIST, L2_DROPS),
795 NSIM_TRAP_DROP(PORT_LOOPBACK_FILTER, L2_DROPS),
796 NSIM_TRAP_DRIVER_EXCEPTION(FID_MISS, L2_DROPS),
797 NSIM_TRAP_DROP(BLACKHOLE_ROUTE, L3_DROPS),
798 NSIM_TRAP_EXCEPTION(TTL_ERROR, L3_EXCEPTIONS),
799 NSIM_TRAP_DROP(TAIL_DROP, BUFFER_DROPS),
800 NSIM_TRAP_DROP_EXT(INGRESS_FLOW_ACTION_DROP, ACL_DROPS,
801 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE),
802 NSIM_TRAP_DROP_EXT(EGRESS_FLOW_ACTION_DROP, ACL_DROPS,
803 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE),
804 NSIM_TRAP_CONTROL(IGMP_QUERY, MC_SNOOPING, MIRROR),
805 NSIM_TRAP_CONTROL(IGMP_V1_REPORT, MC_SNOOPING, TRAP),
806};
807
808#define NSIM_TRAP_L4_DATA_LEN 100
809
810static struct sk_buff *nsim_dev_trap_skb_build(void)
811{
812 int tot_len, data_len = NSIM_TRAP_L4_DATA_LEN;
813 struct sk_buff *skb;
814 struct udphdr *udph;
815 struct ethhdr *eth;
816 struct iphdr *iph;
817
818 skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
819 if (!skb)
820 return NULL;
821 tot_len = sizeof(struct iphdr) + sizeof(struct udphdr) + data_len;
822
823 skb_reset_mac_header(skb);
824 eth = skb_put(skb, len: sizeof(struct ethhdr));
825 eth_random_addr(addr: eth->h_dest);
826 eth_random_addr(addr: eth->h_source);
827 eth->h_proto = htons(ETH_P_IP);
828 skb->protocol = htons(ETH_P_IP);
829
830 skb_set_network_header(skb, offset: skb->len);
831 iph = skb_put(skb, len: sizeof(struct iphdr));
832 iph->protocol = IPPROTO_UDP;
833 iph->saddr = in_aton(str: "192.0.2.1");
834 iph->daddr = in_aton(str: "198.51.100.1");
835 iph->version = 0x4;
836 iph->frag_off = 0;
837 iph->ihl = 0x5;
838 iph->tot_len = htons(tot_len);
839 iph->ttl = 100;
840 iph->check = 0;
841 iph->check = ip_fast_csum(iph: (unsigned char *)iph, ihl: iph->ihl);
842
843 skb_set_transport_header(skb, offset: skb->len);
844 udph = skb_put_zero(skb, len: sizeof(struct udphdr) + data_len);
845 get_random_bytes(buf: &udph->source, len: sizeof(u16));
846 get_random_bytes(buf: &udph->dest, len: sizeof(u16));
847 udph->len = htons(sizeof(struct udphdr) + data_len);
848
849 return skb;
850}
851
852static void nsim_dev_trap_report(struct nsim_dev_port *nsim_dev_port)
853{
854 struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev;
855 struct devlink *devlink = priv_to_devlink(priv: nsim_dev);
856 struct nsim_trap_data *nsim_trap_data;
857 int i;
858
859 nsim_trap_data = nsim_dev->trap_data;
860
861 spin_lock(lock: &nsim_trap_data->trap_lock);
862 for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) {
863 struct flow_action_cookie *fa_cookie = NULL;
864 struct nsim_trap_item *nsim_trap_item;
865 struct sk_buff *skb;
866 bool has_fa_cookie;
867
868 has_fa_cookie = nsim_traps_arr[i].metadata_cap &
869 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE;
870
871 nsim_trap_item = &nsim_trap_data->trap_items_arr[i];
872 if (nsim_trap_item->action == DEVLINK_TRAP_ACTION_DROP)
873 continue;
874
875 skb = nsim_dev_trap_skb_build();
876 if (!skb)
877 continue;
878 skb->dev = nsim_dev_port->ns->netdev;
879
880 /* Trapped packets are usually passed to devlink in softIRQ,
881 * but in this case they are generated in a workqueue. Disable
882 * softIRQs to prevent lockdep from complaining about
883 * "incosistent lock state".
884 */
885
886 spin_lock_bh(lock: &nsim_dev->fa_cookie_lock);
887 fa_cookie = has_fa_cookie ? nsim_dev->fa_cookie : NULL;
888 devlink_trap_report(devlink, skb, trap_ctx: nsim_trap_item->trap_ctx,
889 in_devlink_port: &nsim_dev_port->devlink_port, fa_cookie);
890 spin_unlock_bh(lock: &nsim_dev->fa_cookie_lock);
891 consume_skb(skb);
892 }
893 spin_unlock(lock: &nsim_trap_data->trap_lock);
894}
895
896#define NSIM_TRAP_REPORT_INTERVAL_MS 100
897
898static void nsim_dev_trap_report_work(struct work_struct *work)
899{
900 struct nsim_trap_data *nsim_trap_data;
901 struct nsim_dev_port *nsim_dev_port;
902 struct nsim_dev *nsim_dev;
903
904 nsim_trap_data = container_of(work, struct nsim_trap_data,
905 trap_report_dw.work);
906 nsim_dev = nsim_trap_data->nsim_dev;
907
908 if (!devl_trylock(devlink: priv_to_devlink(priv: nsim_dev))) {
909 queue_delayed_work(wq: system_dfl_wq,
910 dwork: &nsim_dev->trap_data->trap_report_dw, delay: 1);
911 return;
912 }
913
914 /* For each running port and enabled packet trap, generate a UDP
915 * packet with a random 5-tuple and report it.
916 */
917 list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list) {
918 if (!netif_running(dev: nsim_dev_port->ns->netdev))
919 continue;
920
921 nsim_dev_trap_report(nsim_dev_port);
922 cond_resched();
923 }
924 devl_unlock(devlink: priv_to_devlink(priv: nsim_dev));
925 queue_delayed_work(wq: system_dfl_wq,
926 dwork: &nsim_dev->trap_data->trap_report_dw,
927 delay: msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS));
928}
929
930static int nsim_dev_traps_init(struct devlink *devlink)
931{
932 size_t policers_count = ARRAY_SIZE(nsim_trap_policers_arr);
933 struct nsim_dev *nsim_dev = devlink_priv(devlink);
934 struct nsim_trap_data *nsim_trap_data;
935 int err;
936
937 nsim_trap_data = kzalloc(sizeof(*nsim_trap_data), GFP_KERNEL);
938 if (!nsim_trap_data)
939 return -ENOMEM;
940
941 nsim_trap_data->trap_items_arr = kcalloc(ARRAY_SIZE(nsim_traps_arr),
942 sizeof(struct nsim_trap_item),
943 GFP_KERNEL);
944 if (!nsim_trap_data->trap_items_arr) {
945 err = -ENOMEM;
946 goto err_trap_data_free;
947 }
948
949 nsim_trap_data->trap_policers_cnt_arr = kcalloc(policers_count,
950 sizeof(u64),
951 GFP_KERNEL);
952 if (!nsim_trap_data->trap_policers_cnt_arr) {
953 err = -ENOMEM;
954 goto err_trap_items_free;
955 }
956
957 /* The lock is used to protect the action state of the registered
958 * traps. The value is written by user and read in delayed work when
959 * iterating over all the traps.
960 */
961 spin_lock_init(&nsim_trap_data->trap_lock);
962 nsim_trap_data->nsim_dev = nsim_dev;
963 nsim_dev->trap_data = nsim_trap_data;
964
965 err = devl_trap_policers_register(devlink, policers: nsim_trap_policers_arr,
966 policers_count);
967 if (err)
968 goto err_trap_policers_cnt_free;
969
970 err = devl_trap_groups_register(devlink, groups: nsim_trap_groups_arr,
971 ARRAY_SIZE(nsim_trap_groups_arr));
972 if (err)
973 goto err_trap_policers_unregister;
974
975 err = devl_traps_register(devlink, traps: nsim_traps_arr,
976 ARRAY_SIZE(nsim_traps_arr), NULL);
977 if (err)
978 goto err_trap_groups_unregister;
979
980 INIT_DELAYED_WORK(&nsim_dev->trap_data->trap_report_dw,
981 nsim_dev_trap_report_work);
982 queue_delayed_work(wq: system_dfl_wq,
983 dwork: &nsim_dev->trap_data->trap_report_dw,
984 delay: msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS));
985
986 return 0;
987
988err_trap_groups_unregister:
989 devl_trap_groups_unregister(devlink, groups: nsim_trap_groups_arr,
990 ARRAY_SIZE(nsim_trap_groups_arr));
991err_trap_policers_unregister:
992 devl_trap_policers_unregister(devlink, policers: nsim_trap_policers_arr,
993 ARRAY_SIZE(nsim_trap_policers_arr));
994err_trap_policers_cnt_free:
995 kfree(objp: nsim_trap_data->trap_policers_cnt_arr);
996err_trap_items_free:
997 kfree(objp: nsim_trap_data->trap_items_arr);
998err_trap_data_free:
999 kfree(objp: nsim_trap_data);
1000 return err;
1001}
1002
1003static void nsim_dev_traps_exit(struct devlink *devlink)
1004{
1005 struct nsim_dev *nsim_dev = devlink_priv(devlink);
1006
1007 /* caution, trap work takes devlink lock */
1008 cancel_delayed_work_sync(dwork: &nsim_dev->trap_data->trap_report_dw);
1009 devl_traps_unregister(devlink, traps: nsim_traps_arr,
1010 ARRAY_SIZE(nsim_traps_arr));
1011 devl_trap_groups_unregister(devlink, groups: nsim_trap_groups_arr,
1012 ARRAY_SIZE(nsim_trap_groups_arr));
1013 devl_trap_policers_unregister(devlink, policers: nsim_trap_policers_arr,
1014 ARRAY_SIZE(nsim_trap_policers_arr));
1015 kfree(objp: nsim_dev->trap_data->trap_policers_cnt_arr);
1016 kfree(objp: nsim_dev->trap_data->trap_items_arr);
1017 kfree(objp: nsim_dev->trap_data);
1018}
1019
1020static int nsim_dev_reload_create(struct nsim_dev *nsim_dev,
1021 struct netlink_ext_ack *extack);
1022static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev);
1023
1024static int nsim_dev_reload_down(struct devlink *devlink, bool netns_change,
1025 enum devlink_reload_action action, enum devlink_reload_limit limit,
1026 struct netlink_ext_ack *extack)
1027{
1028 struct nsim_dev *nsim_dev = devlink_priv(devlink);
1029
1030 if (nsim_dev->dont_allow_reload) {
1031 /* For testing purposes, user set debugfs dont_allow_reload
1032 * value to true. So forbid it.
1033 */
1034 NL_SET_ERR_MSG_MOD(extack, "User forbid the reload for testing purposes");
1035 return -EOPNOTSUPP;
1036 }
1037
1038 nsim_dev_reload_destroy(nsim_dev);
1039 return 0;
1040}
1041
1042static int nsim_dev_reload_up(struct devlink *devlink, enum devlink_reload_action action,
1043 enum devlink_reload_limit limit, u32 *actions_performed,
1044 struct netlink_ext_ack *extack)
1045{
1046 struct nsim_dev *nsim_dev = devlink_priv(devlink);
1047
1048 if (nsim_dev->fail_reload) {
1049 /* For testing purposes, user set debugfs fail_reload
1050 * value to true. Fail right away.
1051 */
1052 NL_SET_ERR_MSG_MOD(extack, "User setup the reload to fail for testing purposes");
1053 return -EINVAL;
1054 }
1055
1056 *actions_performed = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT);
1057
1058 return nsim_dev_reload_create(nsim_dev, extack);
1059}
1060
1061static int nsim_dev_info_get(struct devlink *devlink,
1062 struct devlink_info_req *req,
1063 struct netlink_ext_ack *extack)
1064{
1065 int err;
1066
1067 err = devlink_info_version_stored_put_ext(req, version_name: "fw.mgmt", version_value: "10.20.30",
1068 version_type: DEVLINK_INFO_VERSION_TYPE_COMPONENT);
1069 if (err)
1070 return err;
1071 return devlink_info_version_running_put_ext(req, version_name: "fw.mgmt", version_value: "10.20.30",
1072 version_type: DEVLINK_INFO_VERSION_TYPE_COMPONENT);
1073}
1074
1075#define NSIM_DEV_FLASH_SIZE 50000
1076#define NSIM_DEV_FLASH_CHUNK_SIZE 1000
1077#define NSIM_DEV_FLASH_CHUNK_TIME_MS_DEFAULT 100
1078
1079static int nsim_dev_flash_update(struct devlink *devlink,
1080 struct devlink_flash_update_params *params,
1081 struct netlink_ext_ack *extack)
1082{
1083 struct nsim_dev *nsim_dev = devlink_priv(devlink);
1084 int i;
1085
1086 if ((params->overwrite_mask & ~nsim_dev->fw_update_overwrite_mask) != 0)
1087 return -EOPNOTSUPP;
1088
1089 if (nsim_dev->fw_update_status) {
1090 devlink_flash_update_status_notify(devlink,
1091 status_msg: "Preparing to flash",
1092 component: params->component, done: 0, total: 0);
1093 }
1094
1095 for (i = 0; i < NSIM_DEV_FLASH_SIZE / NSIM_DEV_FLASH_CHUNK_SIZE; i++) {
1096 if (nsim_dev->fw_update_status)
1097 devlink_flash_update_status_notify(devlink, status_msg: "Flashing",
1098 component: params->component,
1099 done: i * NSIM_DEV_FLASH_CHUNK_SIZE,
1100 NSIM_DEV_FLASH_SIZE);
1101 msleep(msecs: nsim_dev->fw_update_flash_chunk_time_ms ?: 1);
1102 }
1103
1104 if (nsim_dev->fw_update_status) {
1105 devlink_flash_update_status_notify(devlink, status_msg: "Flashing",
1106 component: params->component,
1107 NSIM_DEV_FLASH_SIZE,
1108 NSIM_DEV_FLASH_SIZE);
1109 devlink_flash_update_timeout_notify(devlink, status_msg: "Flash select",
1110 component: params->component, timeout: 81);
1111 devlink_flash_update_status_notify(devlink, status_msg: "Flashing done",
1112 component: params->component, done: 0, total: 0);
1113 }
1114
1115 return 0;
1116}
1117
1118static struct nsim_trap_item *
1119nsim_dev_trap_item_lookup(struct nsim_dev *nsim_dev, u16 trap_id)
1120{
1121 struct nsim_trap_data *nsim_trap_data = nsim_dev->trap_data;
1122 int i;
1123
1124 for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) {
1125 if (nsim_traps_arr[i].id == trap_id)
1126 return &nsim_trap_data->trap_items_arr[i];
1127 }
1128
1129 return NULL;
1130}
1131
1132static int nsim_dev_devlink_trap_init(struct devlink *devlink,
1133 const struct devlink_trap *trap,
1134 void *trap_ctx)
1135{
1136 struct nsim_dev *nsim_dev = devlink_priv(devlink);
1137 struct nsim_trap_item *nsim_trap_item;
1138
1139 nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap_id: trap->id);
1140 if (WARN_ON(!nsim_trap_item))
1141 return -ENOENT;
1142
1143 nsim_trap_item->trap_ctx = trap_ctx;
1144 nsim_trap_item->action = trap->init_action;
1145
1146 return 0;
1147}
1148
1149static int
1150nsim_dev_devlink_trap_action_set(struct devlink *devlink,
1151 const struct devlink_trap *trap,
1152 enum devlink_trap_action action,
1153 struct netlink_ext_ack *extack)
1154{
1155 struct nsim_dev *nsim_dev = devlink_priv(devlink);
1156 struct nsim_trap_item *nsim_trap_item;
1157
1158 nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap_id: trap->id);
1159 if (WARN_ON(!nsim_trap_item))
1160 return -ENOENT;
1161
1162 spin_lock(lock: &nsim_dev->trap_data->trap_lock);
1163 nsim_trap_item->action = action;
1164 spin_unlock(lock: &nsim_dev->trap_data->trap_lock);
1165
1166 return 0;
1167}
1168
1169static int
1170nsim_dev_devlink_trap_group_set(struct devlink *devlink,
1171 const struct devlink_trap_group *group,
1172 const struct devlink_trap_policer *policer,
1173 struct netlink_ext_ack *extack)
1174{
1175 struct nsim_dev *nsim_dev = devlink_priv(devlink);
1176
1177 if (nsim_dev->fail_trap_group_set)
1178 return -EINVAL;
1179
1180 return 0;
1181}
1182
1183static int
1184nsim_dev_devlink_trap_policer_set(struct devlink *devlink,
1185 const struct devlink_trap_policer *policer,
1186 u64 rate, u64 burst,
1187 struct netlink_ext_ack *extack)
1188{
1189 struct nsim_dev *nsim_dev = devlink_priv(devlink);
1190
1191 if (nsim_dev->fail_trap_policer_set) {
1192 NL_SET_ERR_MSG_MOD(extack, "User setup the operation to fail for testing purposes");
1193 return -EINVAL;
1194 }
1195
1196 return 0;
1197}
1198
1199static int
1200nsim_dev_devlink_trap_policer_counter_get(struct devlink *devlink,
1201 const struct devlink_trap_policer *policer,
1202 u64 *p_drops)
1203{
1204 struct nsim_dev *nsim_dev = devlink_priv(devlink);
1205 u64 *cnt;
1206
1207 if (nsim_dev->fail_trap_policer_counter_get)
1208 return -EINVAL;
1209
1210 cnt = &nsim_dev->trap_data->trap_policers_cnt_arr[policer->id - 1];
1211 *p_drops = (*cnt)++;
1212
1213 return 0;
1214}
1215
1216#define NSIM_LINK_SPEED_MAX 5000 /* Mbps */
1217#define NSIM_LINK_SPEED_UNIT 125000 /* 1 Mbps given in bytes/sec to avoid
1218 * u64 overflow during conversion from
1219 * bytes to bits.
1220 */
1221
1222static int nsim_rate_bytes_to_units(char *name, u64 *rate, struct netlink_ext_ack *extack)
1223{
1224 u64 val;
1225 u32 rem;
1226
1227 val = div_u64_rem(dividend: *rate, NSIM_LINK_SPEED_UNIT, remainder: &rem);
1228 if (rem) {
1229 pr_err("%s rate value %lluBps not in link speed units of 1Mbps.\n",
1230 name, *rate);
1231 NL_SET_ERR_MSG_MOD(extack, "TX rate value not in link speed units of 1Mbps.");
1232 return -EINVAL;
1233 }
1234
1235 if (val > NSIM_LINK_SPEED_MAX) {
1236 pr_err("%s rate value %lluMbps exceed link maximum speed 5000Mbps.\n",
1237 name, val);
1238 NL_SET_ERR_MSG_MOD(extack, "TX rate value exceed link maximum speed 5000Mbps.");
1239 return -EINVAL;
1240 }
1241 *rate = val;
1242 return 0;
1243}
1244
1245static int nsim_leaf_tc_bw_set(struct devlink_rate *devlink_rate,
1246 void *priv, u32 *tc_bw,
1247 struct netlink_ext_ack *extack)
1248{
1249 struct nsim_dev_port *nsim_dev_port = priv;
1250 int i;
1251
1252 for (i = 0; i < DEVLINK_RATE_TCS_MAX; i++)
1253 nsim_dev_port->tc_bw[i] = tc_bw[i];
1254
1255 return 0;
1256}
1257
1258static int nsim_leaf_tx_share_set(struct devlink_rate *devlink_rate, void *priv,
1259 u64 tx_share, struct netlink_ext_ack *extack)
1260{
1261 struct nsim_dev_port *nsim_dev_port = priv;
1262 struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev;
1263 int vf_id = nsim_dev_port_index_to_vf_index(port_index: nsim_dev_port->port_index);
1264 int err;
1265
1266 err = nsim_rate_bytes_to_units(name: "tx_share", rate: &tx_share, extack);
1267 if (err)
1268 return err;
1269
1270 nsim_dev->vfconfigs[vf_id].min_tx_rate = tx_share;
1271 return 0;
1272}
1273
1274static int nsim_leaf_tx_max_set(struct devlink_rate *devlink_rate, void *priv,
1275 u64 tx_max, struct netlink_ext_ack *extack)
1276{
1277 struct nsim_dev_port *nsim_dev_port = priv;
1278 struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev;
1279 int vf_id = nsim_dev_port_index_to_vf_index(port_index: nsim_dev_port->port_index);
1280 int err;
1281
1282 err = nsim_rate_bytes_to_units(name: "tx_max", rate: &tx_max, extack);
1283 if (err)
1284 return err;
1285
1286 nsim_dev->vfconfigs[vf_id].max_tx_rate = tx_max;
1287 return 0;
1288}
1289
1290struct nsim_rate_node {
1291 struct dentry *ddir;
1292 struct dentry *rate_parent;
1293 char *parent_name;
1294 u16 tx_share;
1295 u16 tx_max;
1296 u32 tc_bw[DEVLINK_RATE_TCS_MAX];
1297};
1298
1299static int nsim_node_tc_bw_set(struct devlink_rate *devlink_rate, void *priv,
1300 u32 *tc_bw, struct netlink_ext_ack *extack)
1301{
1302 struct nsim_rate_node *nsim_node = priv;
1303 int i;
1304
1305 for (i = 0; i < DEVLINK_RATE_TCS_MAX; i++)
1306 nsim_node->tc_bw[i] = tc_bw[i];
1307
1308 return 0;
1309}
1310
1311static int nsim_node_tx_share_set(struct devlink_rate *devlink_rate, void *priv,
1312 u64 tx_share, struct netlink_ext_ack *extack)
1313{
1314 struct nsim_rate_node *nsim_node = priv;
1315 int err;
1316
1317 err = nsim_rate_bytes_to_units(name: "tx_share", rate: &tx_share, extack);
1318 if (err)
1319 return err;
1320
1321 nsim_node->tx_share = tx_share;
1322 return 0;
1323}
1324
1325static int nsim_node_tx_max_set(struct devlink_rate *devlink_rate, void *priv,
1326 u64 tx_max, struct netlink_ext_ack *extack)
1327{
1328 struct nsim_rate_node *nsim_node = priv;
1329 int err;
1330
1331 err = nsim_rate_bytes_to_units(name: "tx_max", rate: &tx_max, extack);
1332 if (err)
1333 return err;
1334
1335 nsim_node->tx_max = tx_max;
1336 return 0;
1337}
1338
1339static int nsim_rate_node_new(struct devlink_rate *node, void **priv,
1340 struct netlink_ext_ack *extack)
1341{
1342 struct nsim_dev *nsim_dev = devlink_priv(devlink: node->devlink);
1343 struct nsim_rate_node *nsim_node;
1344
1345 if (!nsim_esw_mode_is_switchdev(nsim_dev)) {
1346 NL_SET_ERR_MSG_MOD(extack, "Node creation allowed only in switchdev mode.");
1347 return -EOPNOTSUPP;
1348 }
1349
1350 nsim_node = kzalloc(sizeof(*nsim_node), GFP_KERNEL);
1351 if (!nsim_node)
1352 return -ENOMEM;
1353
1354 nsim_node->ddir = debugfs_create_dir(name: node->name, parent: nsim_dev->nodes_ddir);
1355
1356 debugfs_create_u16(name: "tx_share", mode: 0400, parent: nsim_node->ddir, value: &nsim_node->tx_share);
1357 debugfs_create_u16(name: "tx_max", mode: 0400, parent: nsim_node->ddir, value: &nsim_node->tx_max);
1358 nsim_node->rate_parent = debugfs_create_file("rate_parent", 0400,
1359 nsim_node->ddir,
1360 &nsim_node->parent_name,
1361 &nsim_dev_rate_parent_fops);
1362
1363 nsim_dev_tc_bw_debugfs_init(ddir: nsim_node->ddir, tc_bw: nsim_node->tc_bw);
1364
1365 *priv = nsim_node;
1366 return 0;
1367}
1368
1369static int nsim_rate_node_del(struct devlink_rate *node, void *priv,
1370 struct netlink_ext_ack *extack)
1371{
1372 struct nsim_rate_node *nsim_node = priv;
1373
1374 debugfs_remove(dentry: nsim_node->rate_parent);
1375 debugfs_remove_recursive(dentry: nsim_node->ddir);
1376 kfree(objp: nsim_node);
1377 return 0;
1378}
1379
1380static int nsim_rate_leaf_parent_set(struct devlink_rate *child,
1381 struct devlink_rate *parent,
1382 void *priv_child, void *priv_parent,
1383 struct netlink_ext_ack *extack)
1384{
1385 struct nsim_dev_port *nsim_dev_port = priv_child;
1386
1387 if (parent)
1388 nsim_dev_port->parent_name = parent->name;
1389 else
1390 nsim_dev_port->parent_name = NULL;
1391 return 0;
1392}
1393
1394static int nsim_rate_node_parent_set(struct devlink_rate *child,
1395 struct devlink_rate *parent,
1396 void *priv_child, void *priv_parent,
1397 struct netlink_ext_ack *extack)
1398{
1399 struct nsim_rate_node *nsim_node = priv_child;
1400
1401 if (parent)
1402 nsim_node->parent_name = parent->name;
1403 else
1404 nsim_node->parent_name = NULL;
1405 return 0;
1406}
1407
1408static int
1409nsim_dev_devlink_trap_drop_counter_get(struct devlink *devlink,
1410 const struct devlink_trap *trap,
1411 u64 *p_drops)
1412{
1413 struct nsim_dev *nsim_dev = devlink_priv(devlink);
1414 u64 *cnt;
1415
1416 if (nsim_dev->fail_trap_drop_counter_get)
1417 return -EINVAL;
1418
1419 cnt = &nsim_dev->trap_data->trap_pkt_cnt;
1420 *p_drops = (*cnt)++;
1421
1422 return 0;
1423}
1424
1425static const struct devlink_ops nsim_dev_devlink_ops = {
1426 .eswitch_mode_set = nsim_devlink_eswitch_mode_set,
1427 .eswitch_mode_get = nsim_devlink_eswitch_mode_get,
1428 .supported_flash_update_params = DEVLINK_SUPPORT_FLASH_UPDATE_OVERWRITE_MASK,
1429 .reload_actions = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT),
1430 .reload_down = nsim_dev_reload_down,
1431 .reload_up = nsim_dev_reload_up,
1432 .info_get = nsim_dev_info_get,
1433 .flash_update = nsim_dev_flash_update,
1434 .trap_init = nsim_dev_devlink_trap_init,
1435 .trap_action_set = nsim_dev_devlink_trap_action_set,
1436 .trap_group_set = nsim_dev_devlink_trap_group_set,
1437 .trap_policer_set = nsim_dev_devlink_trap_policer_set,
1438 .trap_policer_counter_get = nsim_dev_devlink_trap_policer_counter_get,
1439 .rate_leaf_tx_share_set = nsim_leaf_tx_share_set,
1440 .rate_leaf_tx_max_set = nsim_leaf_tx_max_set,
1441 .rate_leaf_tc_bw_set = nsim_leaf_tc_bw_set,
1442 .rate_node_tx_share_set = nsim_node_tx_share_set,
1443 .rate_node_tx_max_set = nsim_node_tx_max_set,
1444 .rate_node_tc_bw_set = nsim_node_tc_bw_set,
1445 .rate_node_new = nsim_rate_node_new,
1446 .rate_node_del = nsim_rate_node_del,
1447 .rate_leaf_parent_set = nsim_rate_leaf_parent_set,
1448 .rate_node_parent_set = nsim_rate_node_parent_set,
1449 .trap_drop_counter_get = nsim_dev_devlink_trap_drop_counter_get,
1450};
1451
1452#define NSIM_DEV_MAX_MACS_DEFAULT 32
1453#define NSIM_DEV_TEST1_DEFAULT true
1454
1455static int __nsim_dev_port_add(struct nsim_dev *nsim_dev, enum nsim_dev_port_type type,
1456 unsigned int port_index, u8 perm_addr[ETH_ALEN])
1457{
1458 struct devlink_port_attrs attrs = {};
1459 struct nsim_dev_port *nsim_dev_port;
1460 struct devlink_port *devlink_port;
1461 int err;
1462
1463 if (type == NSIM_DEV_PORT_TYPE_VF && !nsim_dev_get_vfs(nsim_dev))
1464 return -EINVAL;
1465
1466 nsim_dev_port = kzalloc(sizeof(*nsim_dev_port), GFP_KERNEL);
1467 if (!nsim_dev_port)
1468 return -ENOMEM;
1469 nsim_dev_port->port_index = nsim_dev_port_index(type, port_index);
1470 nsim_dev_port->port_type = type;
1471
1472 devlink_port = &nsim_dev_port->devlink_port;
1473 if (nsim_dev_port_is_pf(nsim_dev_port)) {
1474 attrs.flavour = DEVLINK_PORT_FLAVOUR_PHYSICAL;
1475 attrs.phys.port_number = port_index + 1;
1476 } else {
1477 attrs.flavour = DEVLINK_PORT_FLAVOUR_PCI_VF;
1478 attrs.pci_vf.pf = 0;
1479 attrs.pci_vf.vf = port_index;
1480 }
1481 memcpy(attrs.switch_id.id, nsim_dev->switch_id.id, nsim_dev->switch_id.id_len);
1482 attrs.switch_id.id_len = nsim_dev->switch_id.id_len;
1483 devlink_port_attrs_set(devlink_port, attrs: &attrs);
1484 err = devl_port_register(devlink: priv_to_devlink(priv: nsim_dev), devlink_port,
1485 port_index: nsim_dev_port->port_index);
1486 if (err)
1487 goto err_port_free;
1488
1489 err = nsim_dev_port_debugfs_init(nsim_dev, nsim_dev_port);
1490 if (err)
1491 goto err_dl_port_unregister;
1492
1493 nsim_dev_port->ns = nsim_create(nsim_dev, nsim_dev_port, perm_addr);
1494 if (IS_ERR(ptr: nsim_dev_port->ns)) {
1495 err = PTR_ERR(ptr: nsim_dev_port->ns);
1496 goto err_port_debugfs_exit;
1497 }
1498
1499 if (nsim_dev_port_is_vf(nsim_dev_port)) {
1500 err = devl_rate_leaf_create(devlink_port: &nsim_dev_port->devlink_port,
1501 priv: nsim_dev_port, NULL);
1502 if (err)
1503 goto err_nsim_destroy;
1504 }
1505
1506 list_add(new: &nsim_dev_port->list, head: &nsim_dev->port_list);
1507
1508 return 0;
1509
1510err_nsim_destroy:
1511 nsim_destroy(ns: nsim_dev_port->ns);
1512err_port_debugfs_exit:
1513 nsim_dev_port_debugfs_exit(nsim_dev_port);
1514err_dl_port_unregister:
1515 devl_port_unregister(devlink_port);
1516err_port_free:
1517 kfree(objp: nsim_dev_port);
1518 return err;
1519}
1520
1521static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port)
1522{
1523 struct devlink_port *devlink_port = &nsim_dev_port->devlink_port;
1524
1525 list_del(entry: &nsim_dev_port->list);
1526 if (nsim_dev_port_is_vf(nsim_dev_port))
1527 devl_rate_leaf_destroy(devlink_port: &nsim_dev_port->devlink_port);
1528 nsim_destroy(ns: nsim_dev_port->ns);
1529 nsim_dev_port_debugfs_exit(nsim_dev_port);
1530 devl_port_unregister(devlink_port);
1531 kfree(objp: nsim_dev_port);
1532}
1533
1534static void nsim_dev_port_del_all(struct nsim_dev *nsim_dev)
1535{
1536 struct nsim_dev_port *nsim_dev_port, *tmp;
1537
1538 list_for_each_entry_safe(nsim_dev_port, tmp,
1539 &nsim_dev->port_list, list)
1540 __nsim_dev_port_del(nsim_dev_port);
1541}
1542
1543static int nsim_dev_port_add_all(struct nsim_dev *nsim_dev,
1544 unsigned int port_count)
1545{
1546 int i, err;
1547
1548 for (i = 0; i < port_count; i++) {
1549 err = __nsim_dev_port_add(nsim_dev, type: NSIM_DEV_PORT_TYPE_PF, port_index: i, NULL);
1550 if (err)
1551 goto err_port_del_all;
1552 }
1553 return 0;
1554
1555err_port_del_all:
1556 nsim_dev_port_del_all(nsim_dev);
1557 return err;
1558}
1559
1560static int nsim_dev_reload_create(struct nsim_dev *nsim_dev,
1561 struct netlink_ext_ack *extack)
1562{
1563 struct nsim_bus_dev *nsim_bus_dev = nsim_dev->nsim_bus_dev;
1564 struct devlink *devlink;
1565 int err;
1566
1567 devlink = priv_to_devlink(priv: nsim_dev);
1568 nsim_dev = devlink_priv(devlink);
1569 INIT_LIST_HEAD(list: &nsim_dev->port_list);
1570 nsim_dev->fw_update_status = true;
1571 nsim_dev->fw_update_overwrite_mask = 0;
1572
1573 nsim_devlink_param_load_driverinit_values(devlink);
1574
1575 err = nsim_dev_dummy_region_init(nsim_dev, devlink);
1576 if (err)
1577 return err;
1578
1579 err = nsim_dev_traps_init(devlink);
1580 if (err)
1581 goto err_dummy_region_exit;
1582
1583 nsim_dev->fib_data = nsim_fib_create(devlink, extack);
1584 if (IS_ERR(ptr: nsim_dev->fib_data)) {
1585 err = PTR_ERR(ptr: nsim_dev->fib_data);
1586 goto err_traps_exit;
1587 }
1588
1589 err = nsim_dev_health_init(nsim_dev, devlink);
1590 if (err)
1591 goto err_fib_destroy;
1592
1593 err = nsim_dev_psample_init(nsim_dev);
1594 if (err)
1595 goto err_health_exit;
1596
1597 err = nsim_dev_hwstats_init(nsim_dev);
1598 if (err)
1599 goto err_psample_exit;
1600
1601 err = nsim_dev_port_add_all(nsim_dev, port_count: nsim_bus_dev->port_count);
1602 if (err)
1603 goto err_hwstats_exit;
1604
1605 nsim_dev->take_snapshot = debugfs_create_file("take_snapshot",
1606 0200,
1607 nsim_dev->ddir,
1608 nsim_dev,
1609 &nsim_dev_take_snapshot_fops);
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_health_exit:
1617 nsim_dev_health_exit(nsim_dev);
1618err_fib_destroy:
1619 nsim_fib_destroy(devlink, fib_data: nsim_dev->fib_data);
1620err_traps_exit:
1621 nsim_dev_traps_exit(devlink);
1622err_dummy_region_exit:
1623 nsim_dev_dummy_region_exit(nsim_dev);
1624 return err;
1625}
1626
1627int nsim_drv_probe(struct nsim_bus_dev *nsim_bus_dev)
1628{
1629 struct nsim_dev *nsim_dev;
1630 struct devlink *devlink;
1631 int err;
1632
1633 devlink = devlink_alloc_ns(ops: &nsim_dev_devlink_ops, priv_size: sizeof(*nsim_dev),
1634 net: nsim_bus_dev->initial_net, dev: &nsim_bus_dev->dev);
1635 if (!devlink)
1636 return -ENOMEM;
1637 devl_lock(devlink);
1638 nsim_dev = devlink_priv(devlink);
1639 nsim_dev->nsim_bus_dev = nsim_bus_dev;
1640 nsim_dev->switch_id.id_len = sizeof(nsim_dev->switch_id.id);
1641 get_random_bytes(buf: nsim_dev->switch_id.id, len: nsim_dev->switch_id.id_len);
1642 INIT_LIST_HEAD(list: &nsim_dev->port_list);
1643 nsim_dev->fw_update_status = true;
1644 nsim_dev->fw_update_overwrite_mask = 0;
1645 nsim_dev->fw_update_flash_chunk_time_ms = NSIM_DEV_FLASH_CHUNK_TIME_MS_DEFAULT;
1646 nsim_dev->max_macs = NSIM_DEV_MAX_MACS_DEFAULT;
1647 nsim_dev->test1 = NSIM_DEV_TEST1_DEFAULT;
1648 nsim_dev->test2 = NSIM_DEV_TEST2_DEFAULT;
1649 spin_lock_init(&nsim_dev->fa_cookie_lock);
1650 mutex_init(&nsim_dev->progs_list_lock);
1651
1652 dev_set_drvdata(dev: &nsim_bus_dev->dev, data: nsim_dev);
1653
1654 nsim_dev->vfconfigs = kcalloc(nsim_bus_dev->max_vfs,
1655 sizeof(struct nsim_vf_config),
1656 GFP_KERNEL | __GFP_NOWARN);
1657 if (!nsim_dev->vfconfigs) {
1658 err = -ENOMEM;
1659 goto err_devlink_unlock;
1660 }
1661
1662 err = devl_register(devlink);
1663 if (err)
1664 goto err_vfc_free;
1665
1666 err = nsim_dev_resources_register(devlink);
1667 if (err)
1668 goto err_dl_unregister;
1669
1670 err = devl_params_register(devlink, params: nsim_devlink_params,
1671 ARRAY_SIZE(nsim_devlink_params));
1672 if (err)
1673 goto err_resource_unregister;
1674 nsim_devlink_set_params_init_values(nsim_dev, devlink);
1675
1676 err = nsim_dev_dummy_region_init(nsim_dev, devlink);
1677 if (err)
1678 goto err_params_unregister;
1679
1680 err = nsim_dev_traps_init(devlink);
1681 if (err)
1682 goto err_dummy_region_exit;
1683
1684 err = nsim_dev_debugfs_init(nsim_dev);
1685 if (err)
1686 goto err_traps_exit;
1687
1688 nsim_dev->fib_data = nsim_fib_create(devlink, NULL);
1689 if (IS_ERR(ptr: nsim_dev->fib_data)) {
1690 err = PTR_ERR(ptr: nsim_dev->fib_data);
1691 goto err_debugfs_exit;
1692 }
1693
1694 err = nsim_dev_health_init(nsim_dev, devlink);
1695 if (err)
1696 goto err_fib_destroy;
1697
1698 err = nsim_bpf_dev_init(nsim_dev);
1699 if (err)
1700 goto err_health_exit;
1701
1702 err = nsim_dev_psample_init(nsim_dev);
1703 if (err)
1704 goto err_bpf_dev_exit;
1705
1706 err = nsim_dev_hwstats_init(nsim_dev);
1707 if (err)
1708 goto err_psample_exit;
1709
1710 err = nsim_dev_port_add_all(nsim_dev, port_count: nsim_bus_dev->port_count);
1711 if (err)
1712 goto err_hwstats_exit;
1713
1714 nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_LEGACY;
1715 devl_unlock(devlink);
1716 return 0;
1717
1718err_hwstats_exit:
1719 nsim_dev_hwstats_exit(nsim_dev);
1720err_psample_exit:
1721 nsim_dev_psample_exit(nsim_dev);
1722err_bpf_dev_exit:
1723 nsim_bpf_dev_exit(nsim_dev);
1724err_health_exit:
1725 nsim_dev_health_exit(nsim_dev);
1726err_fib_destroy:
1727 nsim_fib_destroy(devlink, fib_data: nsim_dev->fib_data);
1728err_debugfs_exit:
1729 nsim_dev_debugfs_exit(nsim_dev);
1730err_traps_exit:
1731 nsim_dev_traps_exit(devlink);
1732err_dummy_region_exit:
1733 nsim_dev_dummy_region_exit(nsim_dev);
1734err_params_unregister:
1735 devl_params_unregister(devlink, params: nsim_devlink_params,
1736 ARRAY_SIZE(nsim_devlink_params));
1737err_resource_unregister:
1738 devl_resources_unregister(devlink);
1739err_dl_unregister:
1740 devl_unregister(devlink);
1741err_vfc_free:
1742 kfree(objp: nsim_dev->vfconfigs);
1743err_devlink_unlock:
1744 devl_unlock(devlink);
1745 devlink_free(devlink);
1746 dev_set_drvdata(dev: &nsim_bus_dev->dev, NULL);
1747 return err;
1748}
1749
1750static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev)
1751{
1752 struct devlink *devlink = priv_to_devlink(priv: nsim_dev);
1753
1754 if (devlink_is_reload_failed(devlink))
1755 return;
1756 debugfs_remove(dentry: nsim_dev->take_snapshot);
1757
1758 if (nsim_dev_get_vfs(nsim_dev)) {
1759 nsim_bus_dev_set_vfs(nsim_bus_dev: nsim_dev->nsim_bus_dev, num_vfs: 0);
1760 if (nsim_esw_mode_is_switchdev(nsim_dev))
1761 nsim_esw_legacy_enable(nsim_dev, NULL);
1762 }
1763
1764 nsim_dev_port_del_all(nsim_dev);
1765 nsim_dev_hwstats_exit(nsim_dev);
1766 nsim_dev_psample_exit(nsim_dev);
1767 nsim_dev_health_exit(nsim_dev);
1768 nsim_fib_destroy(devlink, fib_data: nsim_dev->fib_data);
1769 nsim_dev_traps_exit(devlink);
1770 nsim_dev_dummy_region_exit(nsim_dev);
1771}
1772
1773void nsim_drv_remove(struct nsim_bus_dev *nsim_bus_dev)
1774{
1775 struct nsim_dev *nsim_dev = dev_get_drvdata(dev: &nsim_bus_dev->dev);
1776 struct devlink *devlink = priv_to_devlink(priv: nsim_dev);
1777
1778 devl_lock(devlink);
1779 nsim_dev_reload_destroy(nsim_dev);
1780
1781 nsim_bpf_dev_exit(nsim_dev);
1782 nsim_dev_debugfs_exit(nsim_dev);
1783 devl_params_unregister(devlink, params: nsim_devlink_params,
1784 ARRAY_SIZE(nsim_devlink_params));
1785 devl_resources_unregister(devlink);
1786 devl_unregister(devlink);
1787 kfree(objp: nsim_dev->vfconfigs);
1788 kfree(objp: nsim_dev->fa_cookie);
1789 mutex_destroy(lock: &nsim_dev->progs_list_lock);
1790 devl_unlock(devlink);
1791 devlink_free(devlink);
1792 dev_set_drvdata(dev: &nsim_bus_dev->dev, NULL);
1793}
1794
1795static struct nsim_dev_port *
1796__nsim_dev_port_lookup(struct nsim_dev *nsim_dev, enum nsim_dev_port_type type,
1797 unsigned int port_index)
1798{
1799 struct nsim_dev_port *nsim_dev_port;
1800
1801 port_index = nsim_dev_port_index(type, port_index);
1802 list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list)
1803 if (nsim_dev_port->port_index == port_index)
1804 return nsim_dev_port;
1805 return NULL;
1806}
1807
1808int nsim_drv_port_add(struct nsim_bus_dev *nsim_bus_dev, enum nsim_dev_port_type type,
1809 unsigned int port_index, u8 perm_addr[ETH_ALEN])
1810{
1811 struct nsim_dev *nsim_dev = dev_get_drvdata(dev: &nsim_bus_dev->dev);
1812 int err;
1813
1814 devl_lock(devlink: priv_to_devlink(priv: nsim_dev));
1815 if (__nsim_dev_port_lookup(nsim_dev, type, port_index))
1816 err = -EEXIST;
1817 else
1818 err = __nsim_dev_port_add(nsim_dev, type, port_index, perm_addr);
1819 devl_unlock(devlink: priv_to_devlink(priv: nsim_dev));
1820 return err;
1821}
1822
1823int nsim_drv_port_del(struct nsim_bus_dev *nsim_bus_dev, enum nsim_dev_port_type type,
1824 unsigned int port_index)
1825{
1826 struct nsim_dev *nsim_dev = dev_get_drvdata(dev: &nsim_bus_dev->dev);
1827 struct nsim_dev_port *nsim_dev_port;
1828 int err = 0;
1829
1830 devl_lock(devlink: priv_to_devlink(priv: nsim_dev));
1831 nsim_dev_port = __nsim_dev_port_lookup(nsim_dev, type, port_index);
1832 if (!nsim_dev_port)
1833 err = -ENOENT;
1834 else
1835 __nsim_dev_port_del(nsim_dev_port);
1836 devl_unlock(devlink: priv_to_devlink(priv: nsim_dev));
1837 return err;
1838}
1839
1840int nsim_drv_configure_vfs(struct nsim_bus_dev *nsim_bus_dev,
1841 unsigned int num_vfs)
1842{
1843 struct nsim_dev *nsim_dev = dev_get_drvdata(dev: &nsim_bus_dev->dev);
1844 struct devlink *devlink = priv_to_devlink(priv: nsim_dev);
1845 int ret = 0;
1846
1847 devl_lock(devlink);
1848 if (nsim_bus_dev->num_vfs == num_vfs)
1849 goto exit_unlock;
1850 if (nsim_bus_dev->num_vfs && num_vfs) {
1851 ret = -EBUSY;
1852 goto exit_unlock;
1853 }
1854 if (nsim_bus_dev->max_vfs < num_vfs) {
1855 ret = -ENOMEM;
1856 goto exit_unlock;
1857 }
1858
1859 nsim_bus_dev_set_vfs(nsim_bus_dev, num_vfs);
1860 if (nsim_esw_mode_is_switchdev(nsim_dev)) {
1861 if (num_vfs) {
1862 ret = nsim_esw_switchdev_enable(nsim_dev, NULL);
1863 if (ret) {
1864 nsim_bus_dev_set_vfs(nsim_bus_dev, num_vfs: 0);
1865 goto exit_unlock;
1866 }
1867 } else {
1868 nsim_esw_legacy_enable(nsim_dev, NULL);
1869 }
1870 }
1871
1872exit_unlock:
1873 devl_unlock(devlink);
1874
1875 return ret;
1876}
1877
1878int nsim_dev_init(void)
1879{
1880 nsim_dev_ddir = debugfs_create_dir(DRV_NAME, NULL);
1881 return PTR_ERR_OR_ZERO(ptr: nsim_dev_ddir);
1882}
1883
1884void nsim_dev_exit(void)
1885{
1886 debugfs_remove_recursive(dentry: nsim_dev_ddir);
1887}
1888

source code of linux/drivers/net/netdevsim/dev.c