projects/linux·blob uaccess-cleanups · refs

1833 lines · 50.4 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/hex.h>
22#include <linux/inet.h>
23#include <linux/jiffies.h>
24#include <linux/kernel.h>
25#include <linux/list.h>
26#include <linux/mutex.h>
27#include <linux/random.h>
28#include <linux/rtnetlink.h>
29#include <linux/workqueue.h>
30#include <net/devlink.h>
31#include <net/ip.h>
32#include <net/flow_offload.h>
33#include <uapi/linux/devlink.h>
34#include <uapi/linux/ip.h>
35#include <uapi/linux/udp.h>
36
37#include "netdevsim.h"
38
39static unsigned int
40nsim_dev_port_index(enum nsim_dev_port_type type, unsigned int port_index)
41{
42 switch (type) {
43 case NSIM_DEV_PORT_TYPE_VF:
44 port_index = NSIM_DEV_VF_PORT_INDEX_BASE + port_index;
45 break;
46 case NSIM_DEV_PORT_TYPE_PF:
47 break;
48 }
49
50 return port_index;
51}
52
53static inline unsigned int nsim_dev_port_index_to_vf_index(unsigned int port_index)
54{
55 return port_index - NSIM_DEV_VF_PORT_INDEX_BASE;
56}
57
58static struct dentry *nsim_dev_ddir;
59
60unsigned int nsim_dev_get_vfs(struct nsim_dev *nsim_dev)
61{
62 WARN_ON(!lockdep_rtnl_is_held() &&
63 !devl_lock_is_held(priv_to_devlink(nsim_dev)));
64
65 return nsim_dev->nsim_bus_dev->num_vfs;
66}
67
68static void
69nsim_bus_dev_set_vfs(struct nsim_bus_dev *nsim_bus_dev, unsigned int num_vfs)
70{
71 rtnl_lock();
72 nsim_bus_dev->num_vfs = num_vfs;
73 rtnl_unlock();
74}
75
76#define NSIM_DEV_DUMMY_REGION_SIZE (1024 * 32)
77
78static int
79nsim_dev_take_snapshot(struct devlink *devlink,
80 const struct devlink_region_ops *ops,
81 struct netlink_ext_ack *extack,
82 u8 **data)
83{
84 void *dummy_data;
85
86 dummy_data = kmalloc(NSIM_DEV_DUMMY_REGION_SIZE, GFP_KERNEL);
87 if (!dummy_data)
88 return -ENOMEM;
89
90 get_random_bytes(dummy_data, NSIM_DEV_DUMMY_REGION_SIZE);
91
92 *data = dummy_data;
93
94 return 0;
95}
96
97static ssize_t nsim_dev_take_snapshot_write(struct file *file,
98 const char __user *data,
99 size_t count, loff_t *ppos)
100{
101 struct nsim_dev *nsim_dev = file->private_data;
102 struct devlink *devlink;
103 u8 *dummy_data;
104 int err;
105 u32 id;
106
107 devlink = priv_to_devlink(nsim_dev);
108
109 err = nsim_dev_take_snapshot(devlink, NULL, NULL, &dummy_data);
110 if (err)
111 return err;
112
113 err = devlink_region_snapshot_id_get(devlink, &id);
114 if (err) {
115 pr_err("Failed to get snapshot id\n");
116 kfree(dummy_data);
117 return err;
118 }
119 err = devlink_region_snapshot_create(nsim_dev->dummy_region,
120 dummy_data, id);
121 devlink_region_snapshot_id_put(devlink, id);
122 if (err) {
123 pr_err("Failed to create region snapshot\n");
124 kfree(dummy_data);
125 return err;
126 }
127
128 return count;
129}
130
131static const struct file_operations nsim_dev_take_snapshot_fops = {
132 .open = simple_open,
133 .write = nsim_dev_take_snapshot_write,
134 .llseek = generic_file_llseek,
135 .owner = THIS_MODULE,
136};
137
138static ssize_t nsim_dev_trap_fa_cookie_read(struct file *file,
139 char __user *data,
140 size_t count, loff_t *ppos)
141{
142 struct nsim_dev *nsim_dev = file->private_data;
143 struct flow_action_cookie *fa_cookie;
144 unsigned int buf_len;
145 ssize_t ret;
146 char *buf;
147
148 spin_lock(&nsim_dev->fa_cookie_lock);
149 fa_cookie = nsim_dev->fa_cookie;
150 if (!fa_cookie) {
151 ret = -EINVAL;
152 goto errout;
153 }
154 buf_len = fa_cookie->cookie_len * 2;
155 buf = kmalloc(buf_len, GFP_ATOMIC);
156 if (!buf) {
157 ret = -ENOMEM;
158 goto errout;
159 }
160 bin2hex(buf, fa_cookie->cookie, fa_cookie->cookie_len);
161 spin_unlock(&nsim_dev->fa_cookie_lock);
162
163 ret = simple_read_from_buffer(data, count, ppos, buf, buf_len);
164
165 kfree(buf);
166 return ret;
167
168errout:
169 spin_unlock(&nsim_dev->fa_cookie_lock);
170 return ret;
171}
172
173static ssize_t nsim_dev_trap_fa_cookie_write(struct file *file,
174 const char __user *data,
175 size_t count, loff_t *ppos)
176{
177 struct nsim_dev *nsim_dev = file->private_data;
178 struct flow_action_cookie *fa_cookie;
179 size_t cookie_len;
180 ssize_t ret;
181 char *buf;
182
183 if (*ppos != 0)
184 return -EINVAL;
185 cookie_len = (count - 1) / 2;
186 if ((count - 1) % 2)
187 return -EINVAL;
188
189 buf = memdup_user(data, count);
190 if (IS_ERR(buf))
191 return PTR_ERR(buf);
192
193 fa_cookie = kmalloc(sizeof(*fa_cookie) + cookie_len,
194 GFP_KERNEL | __GFP_NOWARN);
195 if (!fa_cookie) {
196 ret = -ENOMEM;
197 goto free_buf;
198 }
199
200 fa_cookie->cookie_len = cookie_len;
201 ret = hex2bin(fa_cookie->cookie, buf, cookie_len);
202 if (ret)
203 goto free_fa_cookie;
204 kfree(buf);
205
206 spin_lock(&nsim_dev->fa_cookie_lock);
207 kfree(nsim_dev->fa_cookie);
208 nsim_dev->fa_cookie = fa_cookie;
209 spin_unlock(&nsim_dev->fa_cookie_lock);
210
211 return count;
212
213free_fa_cookie:
214 kfree(fa_cookie);
215free_buf:
216 kfree(buf);
217 return ret;
218}
219
220static const struct file_operations nsim_dev_trap_fa_cookie_fops = {
221 .open = simple_open,
222 .read = nsim_dev_trap_fa_cookie_read,
223 .write = nsim_dev_trap_fa_cookie_write,
224 .llseek = generic_file_llseek,
225 .owner = THIS_MODULE,
226};
227
228static int nsim_dev_debugfs_init(struct nsim_dev *nsim_dev)
229{
230 char dev_ddir_name[sizeof(DRV_NAME) + 10];
231 int err;
232
233 sprintf(dev_ddir_name, DRV_NAME "%u", nsim_dev->nsim_bus_dev->dev.id);
234 nsim_dev->ddir = debugfs_create_dir(dev_ddir_name, nsim_dev_ddir);
235 if (IS_ERR(nsim_dev->ddir))
236 return PTR_ERR(nsim_dev->ddir);
237 nsim_dev->ports_ddir = debugfs_create_dir("ports", nsim_dev->ddir);
238 if (IS_ERR(nsim_dev->ports_ddir)) {
239 err = PTR_ERR(nsim_dev->ports_ddir);
240 goto err_ddir;
241 }
242 debugfs_create_bool("fw_update_status", 0600, nsim_dev->ddir,
243 &nsim_dev->fw_update_status);
244 debugfs_create_u32("fw_update_overwrite_mask", 0600, nsim_dev->ddir,
245 &nsim_dev->fw_update_overwrite_mask);
246 debugfs_create_u32("fw_update_flash_chunk_time_ms", 0600, nsim_dev->ddir,
247 &nsim_dev->fw_update_flash_chunk_time_ms);
248 debugfs_create_u32("max_macs", 0600, nsim_dev->ddir,
249 &nsim_dev->max_macs);
250 debugfs_create_bool("test1", 0600, nsim_dev->ddir,
251 &nsim_dev->test1);
252 debugfs_create_u32("test2", 0600, nsim_dev->ddir,
253 &nsim_dev->test2);
254 nsim_dev->take_snapshot = debugfs_create_file("take_snapshot",
255 0200,
256 nsim_dev->ddir,
257 nsim_dev,
258 &nsim_dev_take_snapshot_fops);
259 debugfs_create_bool("dont_allow_reload", 0600, nsim_dev->ddir,
260 &nsim_dev->dont_allow_reload);
261 debugfs_create_bool("fail_reload", 0600, nsim_dev->ddir,
262 &nsim_dev->fail_reload);
263 debugfs_create_file("trap_flow_action_cookie", 0600, nsim_dev->ddir,
264 nsim_dev, &nsim_dev_trap_fa_cookie_fops);
265 debugfs_create_bool("fail_trap_group_set", 0600,
266 nsim_dev->ddir,
267 &nsim_dev->fail_trap_group_set);
268 debugfs_create_bool("fail_trap_policer_set", 0600,
269 nsim_dev->ddir,
270 &nsim_dev->fail_trap_policer_set);
271 debugfs_create_bool("fail_trap_policer_counter_get", 0600,
272 nsim_dev->ddir,
273 &nsim_dev->fail_trap_policer_counter_get);
274
275 nsim_dev->nodes_ddir = debugfs_create_dir("rate_nodes", nsim_dev->ddir);
276 if (IS_ERR(nsim_dev->nodes_ddir)) {
277 err = PTR_ERR(nsim_dev->nodes_ddir);
278 goto err_ports_ddir;
279 }
280 debugfs_create_bool("fail_trap_drop_counter_get", 0600,
281 nsim_dev->ddir,
282 &nsim_dev->fail_trap_drop_counter_get);
283 nsim_udp_tunnels_debugfs_create(nsim_dev);
284 return 0;
285
286err_ports_ddir:
287 debugfs_remove_recursive(nsim_dev->ports_ddir);
288err_ddir:
289 debugfs_remove_recursive(nsim_dev->ddir);
290 return err;
291}
292
293static void nsim_dev_debugfs_exit(struct nsim_dev *nsim_dev)
294{
295 debugfs_remove_recursive(nsim_dev->nodes_ddir);
296 debugfs_remove_recursive(nsim_dev->ports_ddir);
297 debugfs_remove_recursive(nsim_dev->ddir);
298}
299
300static ssize_t nsim_dev_rate_parent_read(struct file *file,
301 char __user *data,
302 size_t count, loff_t *ppos)
303{
304 char **name_ptr = file->private_data;
305 size_t len;
306
307 if (!*name_ptr)
308 return 0;
309
310 len = strlen(*name_ptr);
311 return simple_read_from_buffer(data, count, ppos, *name_ptr, len);
312}
313
314static const struct file_operations nsim_dev_rate_parent_fops = {
315 .open = simple_open,
316 .read = nsim_dev_rate_parent_read,
317 .llseek = generic_file_llseek,
318 .owner = THIS_MODULE,
319};
320
321static void nsim_dev_tc_bw_debugfs_init(struct dentry *ddir, u32 *tc_bw)
322{
323 int i;
324
325 for (i = 0; i < DEVLINK_RATE_TCS_MAX; i++) {
326 char name[16];
327
328 snprintf(name, sizeof(name), "tc%d_bw", i);
329 debugfs_create_u32(name, 0400, ddir, &tc_bw[i]);
330 }
331}
332static int nsim_dev_port_debugfs_init(struct nsim_dev *nsim_dev,
333 struct nsim_dev_port *nsim_dev_port)
334{
335 struct nsim_bus_dev *nsim_bus_dev = nsim_dev->nsim_bus_dev;
336 unsigned int port_index = nsim_dev_port->port_index;
337 char port_ddir_name[16];
338 char dev_link_name[32];
339
340 sprintf(port_ddir_name, "%u", port_index);
341 nsim_dev_port->ddir = debugfs_create_dir(port_ddir_name,
342 nsim_dev->ports_ddir);
343 if (IS_ERR(nsim_dev_port->ddir))
344 return PTR_ERR(nsim_dev_port->ddir);
345
346 sprintf(dev_link_name, "../../../" DRV_NAME "%u", nsim_bus_dev->dev.id);
347 if (nsim_dev_port_is_vf(nsim_dev_port)) {
348 unsigned int vf_id = nsim_dev_port_index_to_vf_index(port_index);
349
350 debugfs_create_u16("tx_share", 0400, nsim_dev_port->ddir,
351 &nsim_dev->vfconfigs[vf_id].min_tx_rate);
352 debugfs_create_u16("tx_max", 0400, nsim_dev_port->ddir,
353 &nsim_dev->vfconfigs[vf_id].max_tx_rate);
354 nsim_dev_port->rate_parent = debugfs_create_file("rate_parent",
355 0400,
356 nsim_dev_port->ddir,
357 &nsim_dev_port->parent_name,
358 &nsim_dev_rate_parent_fops);
359 nsim_dev_tc_bw_debugfs_init(nsim_dev_port->ddir,
360 nsim_dev_port->tc_bw);
361 }
362 debugfs_create_symlink("dev", nsim_dev_port->ddir, dev_link_name);
363
364 return 0;
365}
366
367static void nsim_dev_port_debugfs_exit(struct nsim_dev_port *nsim_dev_port)
368{
369 debugfs_remove_recursive(nsim_dev_port->ddir);
370}
371
372static int nsim_dev_resources_register(struct devlink *devlink)
373{
374 struct devlink_resource_size_params params = {
375 .size_max = (u64)-1,
376 .size_granularity = 1,
377 .unit = DEVLINK_RESOURCE_UNIT_ENTRY
378 };
379 int err;
380
381 /* Resources for IPv4 */
382 err = devl_resource_register(devlink, "IPv4", (u64)-1,
383 NSIM_RESOURCE_IPV4,
384 DEVLINK_RESOURCE_ID_PARENT_TOP,
385 &params);
386 if (err) {
387 pr_err("Failed to register IPv4 top resource\n");
388 goto err_out;
389 }
390
391 err = devl_resource_register(devlink, "fib", (u64)-1,
392 NSIM_RESOURCE_IPV4_FIB,
393 NSIM_RESOURCE_IPV4, &params);
394 if (err) {
395 pr_err("Failed to register IPv4 FIB resource\n");
396 goto err_out;
397 }
398
399 err = devl_resource_register(devlink, "fib-rules", (u64)-1,
400 NSIM_RESOURCE_IPV4_FIB_RULES,
401 NSIM_RESOURCE_IPV4, &params);
402 if (err) {
403 pr_err("Failed to register IPv4 FIB rules resource\n");
404 goto err_out;
405 }
406
407 /* Resources for IPv6 */
408 err = devl_resource_register(devlink, "IPv6", (u64)-1,
409 NSIM_RESOURCE_IPV6,
410 DEVLINK_RESOURCE_ID_PARENT_TOP,
411 &params);
412 if (err) {
413 pr_err("Failed to register IPv6 top resource\n");
414 goto err_out;
415 }
416
417 err = devl_resource_register(devlink, "fib", (u64)-1,
418 NSIM_RESOURCE_IPV6_FIB,
419 NSIM_RESOURCE_IPV6, &params);
420 if (err) {
421 pr_err("Failed to register IPv6 FIB resource\n");
422 goto err_out;
423 }
424
425 err = devl_resource_register(devlink, "fib-rules", (u64)-1,
426 NSIM_RESOURCE_IPV6_FIB_RULES,
427 NSIM_RESOURCE_IPV6, &params);
428 if (err) {
429 pr_err("Failed to register IPv6 FIB rules resource\n");
430 goto err_out;
431 }
432
433 /* Resources for nexthops */
434 err = devl_resource_register(devlink, "nexthops", (u64)-1,
435 NSIM_RESOURCE_NEXTHOPS,
436 DEVLINK_RESOURCE_ID_PARENT_TOP,
437 &params);
438 if (err) {
439 pr_err("Failed to register NEXTHOPS resource\n");
440 goto err_out;
441 }
442 return 0;
443
444err_out:
445 devl_resources_unregister(devlink);
446 return err;
447}
448
449enum nsim_devlink_param_id {
450 NSIM_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX,
451 NSIM_DEVLINK_PARAM_ID_TEST1,
452 NSIM_DEVLINK_PARAM_ID_TEST2,
453};
454
455static int
456nsim_devlink_param_test2_get(struct devlink *devlink, u32 id,
457 struct devlink_param_gset_ctx *ctx,
458 struct netlink_ext_ack *extack)
459{
460 struct nsim_dev *nsim_dev = devlink_priv(devlink);
461
462 ctx->val.vu32 = nsim_dev->test2;
463 return 0;
464}
465
466static int
467nsim_devlink_param_test2_set(struct devlink *devlink, u32 id,
468 struct devlink_param_gset_ctx *ctx,
469 struct netlink_ext_ack *extack)
470{
471 struct nsim_dev *nsim_dev = devlink_priv(devlink);
472
473 nsim_dev->test2 = ctx->val.vu32;
474 return 0;
475}
476
477#define NSIM_DEV_TEST2_DEFAULT 1234
478
479static int
480nsim_devlink_param_test2_get_default(struct devlink *devlink, u32 id,
481 struct devlink_param_gset_ctx *ctx,
482 struct netlink_ext_ack *extack)
483{
484 ctx->val.vu32 = NSIM_DEV_TEST2_DEFAULT;
485 return 0;
486}
487
488static int
489nsim_devlink_param_test2_reset_default(struct devlink *devlink, u32 id,
490 enum devlink_param_cmode cmode,
491 struct netlink_ext_ack *extack)
492{
493 struct nsim_dev *nsim_dev = devlink_priv(devlink);
494
495 nsim_dev->test2 = NSIM_DEV_TEST2_DEFAULT;
496 return 0;
497}
498
499static const struct devlink_param nsim_devlink_params[] = {
500 DEVLINK_PARAM_GENERIC(MAX_MACS,
501 BIT(DEVLINK_PARAM_CMODE_DRIVERINIT),
502 NULL, NULL, NULL),
503 DEVLINK_PARAM_DRIVER(NSIM_DEVLINK_PARAM_ID_TEST1,
504 "test1", DEVLINK_PARAM_TYPE_BOOL,
505 BIT(DEVLINK_PARAM_CMODE_DRIVERINIT),
506 NULL, NULL, NULL),
507 DEVLINK_PARAM_DRIVER_WITH_DEFAULTS(NSIM_DEVLINK_PARAM_ID_TEST2,
508 "test2", DEVLINK_PARAM_TYPE_U32,
509 BIT(DEVLINK_PARAM_CMODE_RUNTIME),
510 nsim_devlink_param_test2_get,
511 nsim_devlink_param_test2_set,
512 NULL,
513 nsim_devlink_param_test2_get_default,
514 nsim_devlink_param_test2_reset_default),
515};
516
517static void nsim_devlink_set_params_init_values(struct nsim_dev *nsim_dev,
518 struct devlink *devlink)
519{
520 union devlink_param_value value;
521
522 value.vu32 = nsim_dev->max_macs;
523 devl_param_driverinit_value_set(devlink,
524 DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
525 &value);
526 value.vbool = nsim_dev->test1;
527 devl_param_driverinit_value_set(devlink,
528 NSIM_DEVLINK_PARAM_ID_TEST1,
529 &value);
530}
531
532static void nsim_devlink_param_load_driverinit_values(struct devlink *devlink)
533{
534 struct nsim_dev *nsim_dev = devlink_priv(devlink);
535 union devlink_param_value saved_value;
536 int err;
537
538 err = devl_param_driverinit_value_get(devlink,
539 DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
540 &saved_value);
541 if (!err)
542 nsim_dev->max_macs = saved_value.vu32;
543 err = devl_param_driverinit_value_get(devlink,
544 NSIM_DEVLINK_PARAM_ID_TEST1,
545 &saved_value);
546 if (!err)
547 nsim_dev->test1 = saved_value.vbool;
548}
549
550#define NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX 16
551
552static const struct devlink_region_ops dummy_region_ops = {
553 .name = "dummy",
554 .destructor = &kfree,
555 .snapshot = nsim_dev_take_snapshot,
556};
557
558static int nsim_dev_dummy_region_init(struct nsim_dev *nsim_dev,
559 struct devlink *devlink)
560{
561 nsim_dev->dummy_region =
562 devl_region_create(devlink, &dummy_region_ops,
563 NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX,
564 NSIM_DEV_DUMMY_REGION_SIZE);
565 return PTR_ERR_OR_ZERO(nsim_dev->dummy_region);
566}
567
568static void nsim_dev_dummy_region_exit(struct nsim_dev *nsim_dev)
569{
570 devl_region_destroy(nsim_dev->dummy_region);
571}
572
573static int
574__nsim_dev_port_add(struct nsim_dev *nsim_dev, enum nsim_dev_port_type type,
575 unsigned int port_index, u8 perm_addr[ETH_ALEN]);
576static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port);
577
578static int nsim_esw_legacy_enable(struct nsim_dev *nsim_dev,
579 struct netlink_ext_ack *extack)
580{
581 struct devlink *devlink = priv_to_devlink(nsim_dev);
582 struct nsim_dev_port *nsim_dev_port, *tmp;
583
584 devl_rate_nodes_destroy(devlink);
585 list_for_each_entry_safe(nsim_dev_port, tmp, &nsim_dev->port_list, list)
586 if (nsim_dev_port_is_vf(nsim_dev_port))
587 __nsim_dev_port_del(nsim_dev_port);
588 nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_LEGACY;
589 return 0;
590}
591
592static int nsim_esw_switchdev_enable(struct nsim_dev *nsim_dev,
593 struct netlink_ext_ack *extack)
594{
595 struct nsim_dev_port *nsim_dev_port, *tmp;
596 int i, err;
597
598 for (i = 0; i < nsim_dev_get_vfs(nsim_dev); i++) {
599 err = __nsim_dev_port_add(nsim_dev, NSIM_DEV_PORT_TYPE_VF, i, NULL);
600 if (err) {
601 NL_SET_ERR_MSG_MOD(extack, "Failed to initialize VFs' netdevsim ports");
602 pr_err("Failed to initialize VF id=%d. %d.\n", i, err);
603 goto err_port_add_vfs;
604 }
605 }
606 nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_SWITCHDEV;
607 return 0;
608
609err_port_add_vfs:
610 list_for_each_entry_safe(nsim_dev_port, tmp, &nsim_dev->port_list, list)
611 if (nsim_dev_port_is_vf(nsim_dev_port))
612 __nsim_dev_port_del(nsim_dev_port);
613 return err;
614}
615
616static int nsim_devlink_eswitch_mode_set(struct devlink *devlink, u16 mode,
617 struct netlink_ext_ack *extack)
618{
619 struct nsim_dev *nsim_dev = devlink_priv(devlink);
620
621 if (mode == nsim_dev->esw_mode)
622 return 0;
623
624 if (mode == DEVLINK_ESWITCH_MODE_LEGACY)
625 return nsim_esw_legacy_enable(nsim_dev, extack);
626 if (mode == DEVLINK_ESWITCH_MODE_SWITCHDEV)
627 return nsim_esw_switchdev_enable(nsim_dev, extack);
628
629 return -EINVAL;
630}
631
632static int nsim_devlink_eswitch_mode_get(struct devlink *devlink, u16 *mode)
633{
634 struct nsim_dev *nsim_dev = devlink_priv(devlink);
635
636 *mode = nsim_dev->esw_mode;
637 return 0;
638}
639
640struct nsim_trap_item {
641 void *trap_ctx;
642 enum devlink_trap_action action;
643};
644
645struct nsim_trap_data {
646 struct delayed_work trap_report_dw;
647 struct nsim_trap_item *trap_items_arr;
648 u64 *trap_policers_cnt_arr;
649 u64 trap_pkt_cnt;
650 struct nsim_dev *nsim_dev;
651 spinlock_t trap_lock; /* Protects trap_items_arr */
652};
653
654/* All driver-specific traps must be documented in
655 * Documentation/networking/devlink/netdevsim.rst
656 */
657enum {
658 NSIM_TRAP_ID_BASE = DEVLINK_TRAP_GENERIC_ID_MAX,
659 NSIM_TRAP_ID_FID_MISS,
660};
661
662#define NSIM_TRAP_NAME_FID_MISS "fid_miss"
663
664#define NSIM_TRAP_METADATA DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT
665
666#define NSIM_TRAP_DROP(_id, _group_id) \
667 DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \
668 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \
669 NSIM_TRAP_METADATA)
670#define NSIM_TRAP_DROP_EXT(_id, _group_id, _metadata) \
671 DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \
672 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \
673 NSIM_TRAP_METADATA | (_metadata))
674#define NSIM_TRAP_EXCEPTION(_id, _group_id) \
675 DEVLINK_TRAP_GENERIC(EXCEPTION, TRAP, _id, \
676 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \
677 NSIM_TRAP_METADATA)
678#define NSIM_TRAP_CONTROL(_id, _group_id, _action) \
679 DEVLINK_TRAP_GENERIC(CONTROL, _action, _id, \
680 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \
681 NSIM_TRAP_METADATA)
682#define NSIM_TRAP_DRIVER_EXCEPTION(_id, _group_id) \
683 DEVLINK_TRAP_DRIVER(EXCEPTION, TRAP, NSIM_TRAP_ID_##_id, \
684 NSIM_TRAP_NAME_##_id, \
685 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \
686 NSIM_TRAP_METADATA)
687
688#define NSIM_DEV_TRAP_POLICER_MIN_RATE 1
689#define NSIM_DEV_TRAP_POLICER_MAX_RATE 8000
690#define NSIM_DEV_TRAP_POLICER_MIN_BURST 8
691#define NSIM_DEV_TRAP_POLICER_MAX_BURST 65536
692
693#define NSIM_TRAP_POLICER(_id, _rate, _burst) \
694 DEVLINK_TRAP_POLICER(_id, _rate, _burst, \
695 NSIM_DEV_TRAP_POLICER_MAX_RATE, \
696 NSIM_DEV_TRAP_POLICER_MIN_RATE, \
697 NSIM_DEV_TRAP_POLICER_MAX_BURST, \
698 NSIM_DEV_TRAP_POLICER_MIN_BURST)
699
700static const struct devlink_trap_policer nsim_trap_policers_arr[] = {
701 NSIM_TRAP_POLICER(1, 1000, 128),
702 NSIM_TRAP_POLICER(2, 2000, 256),
703 NSIM_TRAP_POLICER(3, 3000, 512),
704};
705
706static const struct devlink_trap_group nsim_trap_groups_arr[] = {
707 DEVLINK_TRAP_GROUP_GENERIC(L2_DROPS, 0),
708 DEVLINK_TRAP_GROUP_GENERIC(L3_DROPS, 1),
709 DEVLINK_TRAP_GROUP_GENERIC(L3_EXCEPTIONS, 1),
710 DEVLINK_TRAP_GROUP_GENERIC(BUFFER_DROPS, 2),
711 DEVLINK_TRAP_GROUP_GENERIC(ACL_DROPS, 3),
712 DEVLINK_TRAP_GROUP_GENERIC(MC_SNOOPING, 3),
713};
714
715static const struct devlink_trap nsim_traps_arr[] = {
716 NSIM_TRAP_DROP(SMAC_MC, L2_DROPS),
717 NSIM_TRAP_DROP(VLAN_TAG_MISMATCH, L2_DROPS),
718 NSIM_TRAP_DROP(INGRESS_VLAN_FILTER, L2_DROPS),
719 NSIM_TRAP_DROP(INGRESS_STP_FILTER, L2_DROPS),
720 NSIM_TRAP_DROP(EMPTY_TX_LIST, L2_DROPS),
721 NSIM_TRAP_DROP(PORT_LOOPBACK_FILTER, L2_DROPS),
722 NSIM_TRAP_DRIVER_EXCEPTION(FID_MISS, L2_DROPS),
723 NSIM_TRAP_DROP(BLACKHOLE_ROUTE, L3_DROPS),
724 NSIM_TRAP_EXCEPTION(TTL_ERROR, L3_EXCEPTIONS),
725 NSIM_TRAP_DROP(TAIL_DROP, BUFFER_DROPS),
726 NSIM_TRAP_DROP_EXT(INGRESS_FLOW_ACTION_DROP, ACL_DROPS,
727 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE),
728 NSIM_TRAP_DROP_EXT(EGRESS_FLOW_ACTION_DROP, ACL_DROPS,
729 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE),
730 NSIM_TRAP_CONTROL(IGMP_QUERY, MC_SNOOPING, MIRROR),
731 NSIM_TRAP_CONTROL(IGMP_V1_REPORT, MC_SNOOPING, TRAP),
732};
733
734#define NSIM_TRAP_L4_DATA_LEN 100
735
736static struct sk_buff *nsim_dev_trap_skb_build(void)
737{
738 int tot_len, data_len = NSIM_TRAP_L4_DATA_LEN;
739 struct sk_buff *skb;
740 struct udphdr *udph;
741 struct ethhdr *eth;
742 struct iphdr *iph;
743
744 skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
745 if (!skb)
746 return NULL;
747 tot_len = sizeof(struct iphdr) + sizeof(struct udphdr) + data_len;
748
749 skb_reset_mac_header(skb);
750 eth = skb_put(skb, sizeof(struct ethhdr));
751 eth_random_addr(eth->h_dest);
752 eth_random_addr(eth->h_source);
753 eth->h_proto = htons(ETH_P_IP);
754 skb->protocol = htons(ETH_P_IP);
755
756 skb_set_network_header(skb, skb->len);
757 iph = skb_put_zero(skb, sizeof(struct iphdr));
758 iph->protocol = IPPROTO_UDP;
759 iph->saddr = in_aton("192.0.2.1");
760 iph->daddr = in_aton("198.51.100.1");
761 iph->version = 0x4;
762 iph->frag_off = 0;
763 iph->ihl = 0x5;
764 iph->tot_len = htons(tot_len);
765 iph->ttl = 100;
766 iph->check = 0;
767 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
768
769 skb_set_transport_header(skb, skb->len);
770 udph = skb_put_zero(skb, sizeof(struct udphdr) + data_len);
771 get_random_bytes(&udph->source, sizeof(u16));
772 get_random_bytes(&udph->dest, sizeof(u16));
773 udp_set_len_short(udph, sizeof(struct udphdr) + data_len);
774
775 return skb;
776}
777
778static void nsim_dev_trap_report(struct nsim_dev_port *nsim_dev_port)
779{
780 struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev;
781 struct devlink *devlink = priv_to_devlink(nsim_dev);
782 struct nsim_trap_data *nsim_trap_data;
783 int i;
784
785 nsim_trap_data = nsim_dev->trap_data;
786
787 spin_lock(&nsim_trap_data->trap_lock);
788 for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) {
789 struct flow_action_cookie *fa_cookie = NULL;
790 struct nsim_trap_item *nsim_trap_item;
791 struct sk_buff *skb;
792 bool has_fa_cookie;
793
794 has_fa_cookie = nsim_traps_arr[i].metadata_cap &
795 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE;
796
797 nsim_trap_item = &nsim_trap_data->trap_items_arr[i];
798 if (nsim_trap_item->action == DEVLINK_TRAP_ACTION_DROP)
799 continue;
800
801 skb = nsim_dev_trap_skb_build();
802 if (!skb)
803 continue;
804 skb->dev = nsim_dev_port->ns->netdev;
805
806 /* Trapped packets are usually passed to devlink in softIRQ,
807 * but in this case they are generated in a workqueue. Disable
808 * softIRQs to prevent lockdep from complaining about
809 * "incosistent lock state".
810 */
811
812 spin_lock_bh(&nsim_dev->fa_cookie_lock);
813 fa_cookie = has_fa_cookie ? nsim_dev->fa_cookie : NULL;
814 devlink_trap_report(devlink, skb, nsim_trap_item->trap_ctx,
815 &nsim_dev_port->devlink_port, fa_cookie);
816 spin_unlock_bh(&nsim_dev->fa_cookie_lock);
817 consume_skb(skb);
818 }
819 spin_unlock(&nsim_trap_data->trap_lock);
820}
821
822#define NSIM_TRAP_REPORT_INTERVAL_MS 100
823
824static void nsim_dev_trap_report_work(struct work_struct *work)
825{
826 struct nsim_trap_data *nsim_trap_data;
827 struct nsim_dev_port *nsim_dev_port;
828 struct nsim_dev *nsim_dev;
829
830 nsim_trap_data = container_of(work, struct nsim_trap_data,
831 trap_report_dw.work);
832 nsim_dev = nsim_trap_data->nsim_dev;
833
834 if (!devl_trylock(priv_to_devlink(nsim_dev))) {
835 queue_delayed_work(system_dfl_wq,
836 &nsim_dev->trap_data->trap_report_dw, 1);
837 return;
838 }
839
840 /* For each running port and enabled packet trap, generate a UDP
841 * packet with a random 5-tuple and report it.
842 */
843 list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list) {
844 if (!netif_running(nsim_dev_port->ns->netdev))
845 continue;
846
847 nsim_dev_trap_report(nsim_dev_port);
848 cond_resched();
849 }
850 devl_unlock(priv_to_devlink(nsim_dev));
851 queue_delayed_work(system_dfl_wq,
852 &nsim_dev->trap_data->trap_report_dw,
853 msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS));
854}
855
856static int nsim_dev_traps_init(struct devlink *devlink)
857{
858 size_t policers_count = ARRAY_SIZE(nsim_trap_policers_arr);
859 struct nsim_dev *nsim_dev = devlink_priv(devlink);
860 struct nsim_trap_data *nsim_trap_data;
861 int err;
862
863 nsim_trap_data = kzalloc_obj(*nsim_trap_data);
864 if (!nsim_trap_data)
865 return -ENOMEM;
866
867 nsim_trap_data->trap_items_arr = kzalloc_objs(struct nsim_trap_item,
868 ARRAY_SIZE(nsim_traps_arr));
869 if (!nsim_trap_data->trap_items_arr) {
870 err = -ENOMEM;
871 goto err_trap_data_free;
872 }
873
874 nsim_trap_data->trap_policers_cnt_arr = kcalloc(policers_count,
875 sizeof(u64),
876 GFP_KERNEL);
877 if (!nsim_trap_data->trap_policers_cnt_arr) {
878 err = -ENOMEM;
879 goto err_trap_items_free;
880 }
881
882 /* The lock is used to protect the action state of the registered
883 * traps. The value is written by user and read in delayed work when
884 * iterating over all the traps.
885 */
886 spin_lock_init(&nsim_trap_data->trap_lock);
887 nsim_trap_data->nsim_dev = nsim_dev;
888 nsim_dev->trap_data = nsim_trap_data;
889
890 err = devl_trap_policers_register(devlink, nsim_trap_policers_arr,
891 policers_count);
892 if (err)
893 goto err_trap_policers_cnt_free;
894
895 err = devl_trap_groups_register(devlink, nsim_trap_groups_arr,
896 ARRAY_SIZE(nsim_trap_groups_arr));
897 if (err)
898 goto err_trap_policers_unregister;
899
900 err = devl_traps_register(devlink, nsim_traps_arr,
901 ARRAY_SIZE(nsim_traps_arr), NULL);
902 if (err)
903 goto err_trap_groups_unregister;
904
905 INIT_DELAYED_WORK(&nsim_dev->trap_data->trap_report_dw,
906 nsim_dev_trap_report_work);
907 queue_delayed_work(system_dfl_wq,
908 &nsim_dev->trap_data->trap_report_dw,
909 msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS));
910
911 return 0;
912
913err_trap_groups_unregister:
914 devl_trap_groups_unregister(devlink, nsim_trap_groups_arr,
915 ARRAY_SIZE(nsim_trap_groups_arr));
916err_trap_policers_unregister:
917 devl_trap_policers_unregister(devlink, nsim_trap_policers_arr,
918 ARRAY_SIZE(nsim_trap_policers_arr));
919err_trap_policers_cnt_free:
920 kfree(nsim_trap_data->trap_policers_cnt_arr);
921err_trap_items_free:
922 kfree(nsim_trap_data->trap_items_arr);
923err_trap_data_free:
924 kfree(nsim_trap_data);
925 return err;
926}
927
928static void nsim_dev_traps_exit(struct devlink *devlink)
929{
930 struct nsim_dev *nsim_dev = devlink_priv(devlink);
931
932 /* caution, trap work takes devlink lock */
933 cancel_delayed_work_sync(&nsim_dev->trap_data->trap_report_dw);
934 devl_traps_unregister(devlink, nsim_traps_arr,
935 ARRAY_SIZE(nsim_traps_arr));
936 devl_trap_groups_unregister(devlink, nsim_trap_groups_arr,
937 ARRAY_SIZE(nsim_trap_groups_arr));
938 devl_trap_policers_unregister(devlink, nsim_trap_policers_arr,
939 ARRAY_SIZE(nsim_trap_policers_arr));
940 kfree(nsim_dev->trap_data->trap_policers_cnt_arr);
941 kfree(nsim_dev->trap_data->trap_items_arr);
942 kfree(nsim_dev->trap_data);
943}
944
945static int nsim_dev_reload_create(struct nsim_dev *nsim_dev,
946 struct netlink_ext_ack *extack);
947static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev);
948
949static int nsim_dev_reload_down(struct devlink *devlink, bool netns_change,
950 enum devlink_reload_action action, enum devlink_reload_limit limit,
951 struct netlink_ext_ack *extack)
952{
953 struct nsim_dev *nsim_dev = devlink_priv(devlink);
954
955 if (nsim_dev->dont_allow_reload) {
956 /* For testing purposes, user set debugfs dont_allow_reload
957 * value to true. So forbid it.
958 */
959 NL_SET_ERR_MSG_MOD(extack, "User forbid the reload for testing purposes");
960 return -EOPNOTSUPP;
961 }
962
963 nsim_dev_reload_destroy(nsim_dev);
964 return 0;
965}
966
967static int nsim_dev_reload_up(struct devlink *devlink, enum devlink_reload_action action,
968 enum devlink_reload_limit limit, u32 *actions_performed,
969 struct netlink_ext_ack *extack)
970{
971 struct nsim_dev *nsim_dev = devlink_priv(devlink);
972
973 if (nsim_dev->fail_reload) {
974 /* For testing purposes, user set debugfs fail_reload
975 * value to true. Fail right away.
976 */
977 NL_SET_ERR_MSG_MOD(extack, "User setup the reload to fail for testing purposes");
978 return -EINVAL;
979 }
980
981 *actions_performed = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT);
982
983 return nsim_dev_reload_create(nsim_dev, extack);
984}
985
986static int nsim_dev_info_get(struct devlink *devlink,
987 struct devlink_info_req *req,
988 struct netlink_ext_ack *extack)
989{
990 int err;
991
992 err = devlink_info_version_stored_put_ext(req, "fw.mgmt", "10.20.30",
993 DEVLINK_INFO_VERSION_TYPE_COMPONENT);
994 if (err)
995 return err;
996 return devlink_info_version_running_put_ext(req, "fw.mgmt", "10.20.30",
997 DEVLINK_INFO_VERSION_TYPE_COMPONENT);
998}
999
1000#define NSIM_DEV_FLASH_SIZE 50000
1001#define NSIM_DEV_FLASH_CHUNK_SIZE 1000
1002#define NSIM_DEV_FLASH_CHUNK_TIME_MS_DEFAULT 100
1003
1004static int nsim_dev_flash_update(struct devlink *devlink,
1005 struct devlink_flash_update_params *params,
1006 struct netlink_ext_ack *extack)
1007{
1008 struct nsim_dev *nsim_dev = devlink_priv(devlink);
1009 int i;
1010
1011 if ((params->overwrite_mask & ~nsim_dev->fw_update_overwrite_mask) != 0)
1012 return -EOPNOTSUPP;
1013
1014 if (nsim_dev->fw_update_status) {
1015 devlink_flash_update_status_notify(devlink,
1016 "Preparing to flash",
1017 params->component, 0, 0);
1018 }
1019
1020 for (i = 0; i < NSIM_DEV_FLASH_SIZE / NSIM_DEV_FLASH_CHUNK_SIZE; i++) {
1021 if (nsim_dev->fw_update_status)
1022 devlink_flash_update_status_notify(devlink, "Flashing",
1023 params->component,
1024 i * NSIM_DEV_FLASH_CHUNK_SIZE,
1025 NSIM_DEV_FLASH_SIZE);
1026 msleep(nsim_dev->fw_update_flash_chunk_time_ms ?: 1);
1027 }
1028
1029 if (nsim_dev->fw_update_status) {
1030 devlink_flash_update_status_notify(devlink, "Flashing",
1031 params->component,
1032 NSIM_DEV_FLASH_SIZE,
1033 NSIM_DEV_FLASH_SIZE);
1034 devlink_flash_update_timeout_notify(devlink, "Flash select",
1035 params->component, 81);
1036 devlink_flash_update_status_notify(devlink, "Flashing done",
1037 params->component, 0, 0);
1038 }
1039
1040 return 0;
1041}
1042
1043static struct nsim_trap_item *
1044nsim_dev_trap_item_lookup(struct nsim_dev *nsim_dev, u16 trap_id)
1045{
1046 struct nsim_trap_data *nsim_trap_data = nsim_dev->trap_data;
1047 int i;
1048
1049 for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) {
1050 if (nsim_traps_arr[i].id == trap_id)
1051 return &nsim_trap_data->trap_items_arr[i];
1052 }
1053
1054 return NULL;
1055}
1056
1057static int nsim_dev_devlink_trap_init(struct devlink *devlink,
1058 const struct devlink_trap *trap,
1059 void *trap_ctx)
1060{
1061 struct nsim_dev *nsim_dev = devlink_priv(devlink);
1062 struct nsim_trap_item *nsim_trap_item;
1063
1064 nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id);
1065 if (WARN_ON(!nsim_trap_item))
1066 return -ENOENT;
1067
1068 nsim_trap_item->trap_ctx = trap_ctx;
1069 nsim_trap_item->action = trap->init_action;
1070
1071 return 0;
1072}
1073
1074static int
1075nsim_dev_devlink_trap_action_set(struct devlink *devlink,
1076 const struct devlink_trap *trap,
1077 enum devlink_trap_action action,
1078 struct netlink_ext_ack *extack)
1079{
1080 struct nsim_dev *nsim_dev = devlink_priv(devlink);
1081 struct nsim_trap_item *nsim_trap_item;
1082
1083 nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id);
1084 if (WARN_ON(!nsim_trap_item))
1085 return -ENOENT;
1086
1087 spin_lock(&nsim_dev->trap_data->trap_lock);
1088 nsim_trap_item->action = action;
1089 spin_unlock(&nsim_dev->trap_data->trap_lock);
1090
1091 return 0;
1092}
1093
1094static int
1095nsim_dev_devlink_trap_group_set(struct devlink *devlink,
1096 const struct devlink_trap_group *group,
1097 const struct devlink_trap_policer *policer,
1098 struct netlink_ext_ack *extack)
1099{
1100 struct nsim_dev *nsim_dev = devlink_priv(devlink);
1101
1102 if (nsim_dev->fail_trap_group_set)
1103 return -EINVAL;
1104
1105 return 0;
1106}
1107
1108static int
1109nsim_dev_devlink_trap_policer_set(struct devlink *devlink,
1110 const struct devlink_trap_policer *policer,
1111 u64 rate, u64 burst,
1112 struct netlink_ext_ack *extack)
1113{
1114 struct nsim_dev *nsim_dev = devlink_priv(devlink);
1115
1116 if (nsim_dev->fail_trap_policer_set) {
1117 NL_SET_ERR_MSG_MOD(extack, "User setup the operation to fail for testing purposes");
1118 return -EINVAL;
1119 }
1120
1121 return 0;
1122}
1123
1124static int
1125nsim_dev_devlink_trap_policer_counter_get(struct devlink *devlink,
1126 const struct devlink_trap_policer *policer,
1127 u64 *p_drops)
1128{
1129 struct nsim_dev *nsim_dev = devlink_priv(devlink);
1130 u64 *cnt;
1131
1132 if (nsim_dev->fail_trap_policer_counter_get)
1133 return -EINVAL;
1134
1135 cnt = &nsim_dev->trap_data->trap_policers_cnt_arr[policer->id - 1];
1136 *p_drops = (*cnt)++;
1137
1138 return 0;
1139}
1140
1141#define NSIM_LINK_SPEED_MAX 5000 /* Mbps */
1142#define NSIM_LINK_SPEED_UNIT 125000 /* 1 Mbps given in bytes/sec to avoid
1143 * u64 overflow during conversion from
1144 * bytes to bits.
1145 */
1146
1147static int nsim_rate_bytes_to_units(char *name, u64 *rate, struct netlink_ext_ack *extack)
1148{
1149 u64 val;
1150 u32 rem;
1151
1152 val = div_u64_rem(*rate, NSIM_LINK_SPEED_UNIT, &rem);
1153 if (rem) {
1154 pr_err("%s rate value %lluBps not in link speed units of 1Mbps.\n",
1155 name, *rate);
1156 NL_SET_ERR_MSG_MOD(extack, "TX rate value not in link speed units of 1Mbps.");
1157 return -EINVAL;
1158 }
1159
1160 if (val > NSIM_LINK_SPEED_MAX) {
1161 pr_err("%s rate value %lluMbps exceed link maximum speed 5000Mbps.\n",
1162 name, val);
1163 NL_SET_ERR_MSG_MOD(extack, "TX rate value exceed link maximum speed 5000Mbps.");
1164 return -EINVAL;
1165 }
1166 *rate = val;
1167 return 0;
1168}
1169
1170static int nsim_leaf_tc_bw_set(struct devlink_rate *devlink_rate,
1171 void *priv, u32 *tc_bw,
1172 struct netlink_ext_ack *extack)
1173{
1174 struct nsim_dev_port *nsim_dev_port = priv;
1175 int i;
1176
1177 for (i = 0; i < DEVLINK_RATE_TCS_MAX; i++)
1178 nsim_dev_port->tc_bw[i] = tc_bw[i];
1179
1180 return 0;
1181}
1182
1183static int nsim_leaf_tx_share_set(struct devlink_rate *devlink_rate, void *priv,
1184 u64 tx_share, struct netlink_ext_ack *extack)
1185{
1186 struct nsim_dev_port *nsim_dev_port = priv;
1187 struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev;
1188 int vf_id = nsim_dev_port_index_to_vf_index(nsim_dev_port->port_index);
1189 int err;
1190
1191 err = nsim_rate_bytes_to_units("tx_share", &tx_share, extack);
1192 if (err)
1193 return err;
1194
1195 nsim_dev->vfconfigs[vf_id].min_tx_rate = tx_share;
1196 return 0;
1197}
1198
1199static int nsim_leaf_tx_max_set(struct devlink_rate *devlink_rate, void *priv,
1200 u64 tx_max, struct netlink_ext_ack *extack)
1201{
1202 struct nsim_dev_port *nsim_dev_port = priv;
1203 struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev;
1204 int vf_id = nsim_dev_port_index_to_vf_index(nsim_dev_port->port_index);
1205 int err;
1206
1207 err = nsim_rate_bytes_to_units("tx_max", &tx_max, extack);
1208 if (err)
1209 return err;
1210
1211 nsim_dev->vfconfigs[vf_id].max_tx_rate = tx_max;
1212 return 0;
1213}
1214
1215struct nsim_rate_node {
1216 struct dentry *ddir;
1217 struct dentry *rate_parent;
1218 char *parent_name;
1219 u16 tx_share;
1220 u16 tx_max;
1221 u32 tc_bw[DEVLINK_RATE_TCS_MAX];
1222};
1223
1224static int nsim_node_tc_bw_set(struct devlink_rate *devlink_rate, void *priv,
1225 u32 *tc_bw, struct netlink_ext_ack *extack)
1226{
1227 struct nsim_rate_node *nsim_node = priv;
1228 int i;
1229
1230 for (i = 0; i < DEVLINK_RATE_TCS_MAX; i++)
1231 nsim_node->tc_bw[i] = tc_bw[i];
1232
1233 return 0;
1234}
1235
1236static int nsim_node_tx_share_set(struct devlink_rate *devlink_rate, void *priv,
1237 u64 tx_share, struct netlink_ext_ack *extack)
1238{
1239 struct nsim_rate_node *nsim_node = priv;
1240 int err;
1241
1242 err = nsim_rate_bytes_to_units("tx_share", &tx_share, extack);
1243 if (err)
1244 return err;
1245
1246 nsim_node->tx_share = tx_share;
1247 return 0;
1248}
1249
1250static int nsim_node_tx_max_set(struct devlink_rate *devlink_rate, void *priv,
1251 u64 tx_max, struct netlink_ext_ack *extack)
1252{
1253 struct nsim_rate_node *nsim_node = priv;
1254 int err;
1255
1256 err = nsim_rate_bytes_to_units("tx_max", &tx_max, extack);
1257 if (err)
1258 return err;
1259
1260 nsim_node->tx_max = tx_max;
1261 return 0;
1262}
1263
1264static int nsim_rate_node_new(struct devlink_rate *node, void **priv,
1265 struct netlink_ext_ack *extack)
1266{
1267 struct nsim_dev *nsim_dev = devlink_priv(node->devlink);
1268 struct nsim_rate_node *nsim_node;
1269
1270 if (!nsim_esw_mode_is_switchdev(nsim_dev)) {
1271 NL_SET_ERR_MSG_MOD(extack, "Node creation allowed only in switchdev mode.");
1272 return -EOPNOTSUPP;
1273 }
1274
1275 nsim_node = kzalloc_obj(*nsim_node);
1276 if (!nsim_node)
1277 return -ENOMEM;
1278
1279 nsim_node->ddir = debugfs_create_dir(node->name, nsim_dev->nodes_ddir);
1280
1281 debugfs_create_u16("tx_share", 0400, nsim_node->ddir, &nsim_node->tx_share);
1282 debugfs_create_u16("tx_max", 0400, nsim_node->ddir, &nsim_node->tx_max);
1283 nsim_node->rate_parent = debugfs_create_file("rate_parent", 0400,
1284 nsim_node->ddir,
1285 &nsim_node->parent_name,
1286 &nsim_dev_rate_parent_fops);
1287
1288 nsim_dev_tc_bw_debugfs_init(nsim_node->ddir, nsim_node->tc_bw);
1289
1290 *priv = nsim_node;
1291 return 0;
1292}
1293
1294static int nsim_rate_node_del(struct devlink_rate *node, void *priv,
1295 struct netlink_ext_ack *extack)
1296{
1297 struct nsim_rate_node *nsim_node = priv;
1298
1299 debugfs_remove(nsim_node->rate_parent);
1300 debugfs_remove_recursive(nsim_node->ddir);
1301 kfree(nsim_node);
1302 return 0;
1303}
1304
1305static int nsim_rate_leaf_parent_set(struct devlink_rate *child,
1306 struct devlink_rate *parent,
1307 void *priv_child, void *priv_parent,
1308 struct netlink_ext_ack *extack)
1309{
1310 struct nsim_dev_port *nsim_dev_port = priv_child;
1311
1312 if (parent)
1313 nsim_dev_port->parent_name = parent->name;
1314 else
1315 nsim_dev_port->parent_name = NULL;
1316 return 0;
1317}
1318
1319static int nsim_rate_node_parent_set(struct devlink_rate *child,
1320 struct devlink_rate *parent,
1321 void *priv_child, void *priv_parent,
1322 struct netlink_ext_ack *extack)
1323{
1324 struct nsim_rate_node *nsim_node = priv_child;
1325
1326 if (parent)
1327 nsim_node->parent_name = parent->name;
1328 else
1329 nsim_node->parent_name = NULL;
1330 return 0;
1331}
1332
1333static int
1334nsim_dev_devlink_trap_drop_counter_get(struct devlink *devlink,
1335 const struct devlink_trap *trap,
1336 u64 *p_drops)
1337{
1338 struct nsim_dev *nsim_dev = devlink_priv(devlink);
1339 u64 *cnt;
1340
1341 if (nsim_dev->fail_trap_drop_counter_get)
1342 return -EINVAL;
1343
1344 cnt = &nsim_dev->trap_data->trap_pkt_cnt;
1345 *p_drops = (*cnt)++;
1346
1347 return 0;
1348}
1349
1350static const struct devlink_ops nsim_dev_devlink_ops = {
1351 .eswitch_mode_set = nsim_devlink_eswitch_mode_set,
1352 .eswitch_mode_get = nsim_devlink_eswitch_mode_get,
1353 .supported_flash_update_params = DEVLINK_SUPPORT_FLASH_UPDATE_OVERWRITE_MASK,
1354 .reload_actions = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT),
1355 .reload_down = nsim_dev_reload_down,
1356 .reload_up = nsim_dev_reload_up,
1357 .info_get = nsim_dev_info_get,
1358 .flash_update = nsim_dev_flash_update,
1359 .trap_init = nsim_dev_devlink_trap_init,
1360 .trap_action_set = nsim_dev_devlink_trap_action_set,
1361 .trap_group_set = nsim_dev_devlink_trap_group_set,
1362 .trap_policer_set = nsim_dev_devlink_trap_policer_set,
1363 .trap_policer_counter_get = nsim_dev_devlink_trap_policer_counter_get,
1364 .rate_leaf_tx_share_set = nsim_leaf_tx_share_set,
1365 .rate_leaf_tx_max_set = nsim_leaf_tx_max_set,
1366 .rate_leaf_tc_bw_set = nsim_leaf_tc_bw_set,
1367 .rate_node_tx_share_set = nsim_node_tx_share_set,
1368 .rate_node_tx_max_set = nsim_node_tx_max_set,
1369 .rate_node_tc_bw_set = nsim_node_tc_bw_set,
1370 .rate_node_new = nsim_rate_node_new,
1371 .rate_node_del = nsim_rate_node_del,
1372 .rate_leaf_parent_set = nsim_rate_leaf_parent_set,
1373 .rate_node_parent_set = nsim_rate_node_parent_set,
1374 .trap_drop_counter_get = nsim_dev_devlink_trap_drop_counter_get,
1375};
1376
1377#define NSIM_DEV_MAX_MACS_DEFAULT 32
1378#define NSIM_DEV_TEST1_DEFAULT true
1379
1380static int __nsim_dev_port_add(struct nsim_dev *nsim_dev, enum nsim_dev_port_type type,
1381 unsigned int port_index, u8 perm_addr[ETH_ALEN])
1382{
1383 struct devlink_port_attrs attrs = {};
1384 struct nsim_dev_port *nsim_dev_port;
1385 struct devlink_port *devlink_port;
1386 int err;
1387
1388 if (type == NSIM_DEV_PORT_TYPE_VF && !nsim_dev_get_vfs(nsim_dev))
1389 return -EINVAL;
1390
1391 nsim_dev_port = kzalloc_obj(*nsim_dev_port);
1392 if (!nsim_dev_port)
1393 return -ENOMEM;
1394 nsim_dev_port->port_index = nsim_dev_port_index(type, port_index);
1395 nsim_dev_port->port_type = type;
1396
1397 devlink_port = &nsim_dev_port->devlink_port;
1398 if (nsim_dev_port_is_pf(nsim_dev_port)) {
1399 attrs.flavour = DEVLINK_PORT_FLAVOUR_PHYSICAL;
1400 attrs.phys.port_number = port_index + 1;
1401 } else {
1402 attrs.flavour = DEVLINK_PORT_FLAVOUR_PCI_VF;
1403 attrs.pci_vf.pf = 0;
1404 attrs.pci_vf.vf = port_index;
1405 }
1406 memcpy(attrs.switch_id.id, nsim_dev->switch_id.id, nsim_dev->switch_id.id_len);
1407 attrs.switch_id.id_len = nsim_dev->switch_id.id_len;
1408 devlink_port_attrs_set(devlink_port, &attrs);
1409 err = devl_port_register(priv_to_devlink(nsim_dev), devlink_port,
1410 nsim_dev_port->port_index);
1411 if (err)
1412 goto err_port_free;
1413
1414 if (nsim_dev_port_is_pf(nsim_dev_port)) {
1415 u64 parent_id = DEVLINK_RESOURCE_ID_PARENT_TOP;
1416 struct devlink_resource_size_params params = {
1417 .size_max = 100,
1418 .size_granularity = 1,
1419 .unit = DEVLINK_RESOURCE_UNIT_ENTRY
1420 };
1421
1422 err = devl_port_resource_register(devlink_port,
1423 "test_resource", 20,
1424 NSIM_PORT_RESOURCE_TEST,
1425 parent_id, &params);
1426 if (err)
1427 goto err_dl_port_unregister;
1428 }
1429
1430 err = nsim_dev_port_debugfs_init(nsim_dev, nsim_dev_port);
1431 if (err)
1432 goto err_port_resource_unregister;
1433
1434 nsim_dev_port->ns = nsim_create(nsim_dev, nsim_dev_port, perm_addr);
1435 if (IS_ERR(nsim_dev_port->ns)) {
1436 err = PTR_ERR(nsim_dev_port->ns);
1437 goto err_port_debugfs_exit;
1438 }
1439
1440 if (nsim_dev_port_is_vf(nsim_dev_port)) {
1441 err = devl_rate_leaf_create(&nsim_dev_port->devlink_port,
1442 nsim_dev_port, NULL);
1443 if (err)
1444 goto err_nsim_destroy;
1445 }
1446
1447 list_add(&nsim_dev_port->list, &nsim_dev->port_list);
1448
1449 return 0;
1450
1451err_nsim_destroy:
1452 nsim_destroy(nsim_dev_port->ns);
1453err_port_debugfs_exit:
1454 nsim_dev_port_debugfs_exit(nsim_dev_port);
1455err_port_resource_unregister:
1456 if (nsim_dev_port_is_pf(nsim_dev_port))
1457 devl_port_resources_unregister(devlink_port);
1458err_dl_port_unregister:
1459 devl_port_unregister(devlink_port);
1460err_port_free:
1461 kfree(nsim_dev_port);
1462 return err;
1463}
1464
1465static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port)
1466{
1467 struct devlink_port *devlink_port = &nsim_dev_port->devlink_port;
1468
1469 list_del(&nsim_dev_port->list);
1470 if (nsim_dev_port_is_vf(nsim_dev_port))
1471 devl_rate_leaf_destroy(&nsim_dev_port->devlink_port);
1472 nsim_destroy(nsim_dev_port->ns);
1473 nsim_dev_port_debugfs_exit(nsim_dev_port);
1474 if (nsim_dev_port_is_pf(nsim_dev_port))
1475 devl_port_resources_unregister(devlink_port);
1476 devl_port_unregister(devlink_port);
1477 kfree(nsim_dev_port);
1478}
1479
1480static void nsim_dev_port_del_all(struct nsim_dev *nsim_dev)
1481{
1482 struct nsim_dev_port *nsim_dev_port, *tmp;
1483
1484 list_for_each_entry_safe(nsim_dev_port, tmp,
1485 &nsim_dev->port_list, list)
1486 __nsim_dev_port_del(nsim_dev_port);
1487}
1488
1489static int nsim_dev_port_add_all(struct nsim_dev *nsim_dev,
1490 unsigned int port_count)
1491{
1492 int i, err;
1493
1494 for (i = 0; i < port_count; i++) {
1495 err = __nsim_dev_port_add(nsim_dev, NSIM_DEV_PORT_TYPE_PF, i, NULL);
1496 if (err)
1497 goto err_port_del_all;
1498 }
1499 return 0;
1500
1501err_port_del_all:
1502 nsim_dev_port_del_all(nsim_dev);
1503 return err;
1504}
1505
1506static int nsim_dev_reload_create(struct nsim_dev *nsim_dev,
1507 struct netlink_ext_ack *extack)
1508{
1509 struct nsim_bus_dev *nsim_bus_dev = nsim_dev->nsim_bus_dev;
1510 struct devlink *devlink;
1511 int err;
1512
1513 devlink = priv_to_devlink(nsim_dev);
1514 nsim_dev = devlink_priv(devlink);
1515 INIT_LIST_HEAD(&nsim_dev->port_list);
1516 nsim_dev->fw_update_status = true;
1517 nsim_dev->fw_update_overwrite_mask = 0;
1518
1519 nsim_devlink_param_load_driverinit_values(devlink);
1520
1521 err = nsim_dev_dummy_region_init(nsim_dev, devlink);
1522 if (err)
1523 return err;
1524
1525 err = nsim_dev_traps_init(devlink);
1526 if (err)
1527 goto err_dummy_region_exit;
1528
1529 nsim_dev->fib_data = nsim_fib_create(devlink, extack);
1530 if (IS_ERR(nsim_dev->fib_data)) {
1531 err = PTR_ERR(nsim_dev->fib_data);
1532 goto err_traps_exit;
1533 }
1534
1535 err = nsim_dev_health_init(nsim_dev, devlink);
1536 if (err)
1537 goto err_fib_destroy;
1538
1539 err = nsim_dev_psample_init(nsim_dev);
1540 if (err)
1541 goto err_health_exit;
1542
1543 err = nsim_dev_hwstats_init(nsim_dev);
1544 if (err)
1545 goto err_psample_exit;
1546
1547 err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count);
1548 if (err)
1549 goto err_hwstats_exit;
1550
1551 nsim_dev->take_snapshot = debugfs_create_file("take_snapshot",
1552 0200,
1553 nsim_dev->ddir,
1554 nsim_dev,
1555 &nsim_dev_take_snapshot_fops);
1556 return 0;
1557
1558err_hwstats_exit:
1559 nsim_dev_hwstats_exit(nsim_dev);
1560err_psample_exit:
1561 nsim_dev_psample_exit(nsim_dev);
1562err_health_exit:
1563 nsim_dev_health_exit(nsim_dev);
1564err_fib_destroy:
1565 nsim_fib_destroy(devlink, nsim_dev->fib_data);
1566err_traps_exit:
1567 nsim_dev_traps_exit(devlink);
1568err_dummy_region_exit:
1569 nsim_dev_dummy_region_exit(nsim_dev);
1570 return err;
1571}
1572
1573int nsim_drv_probe(struct nsim_bus_dev *nsim_bus_dev)
1574{
1575 struct nsim_dev *nsim_dev;
1576 struct devlink *devlink;
1577 int err;
1578
1579 devlink = devlink_alloc_ns(&nsim_dev_devlink_ops, sizeof(*nsim_dev),
1580 nsim_bus_dev->initial_net, &nsim_bus_dev->dev);
1581 if (!devlink)
1582 return -ENOMEM;
1583 devl_lock(devlink);
1584 nsim_dev = devlink_priv(devlink);
1585 nsim_dev->nsim_bus_dev = nsim_bus_dev;
1586 nsim_dev->switch_id.id_len = sizeof(nsim_dev->switch_id.id);
1587 get_random_bytes(nsim_dev->switch_id.id, nsim_dev->switch_id.id_len);
1588 INIT_LIST_HEAD(&nsim_dev->port_list);
1589 nsim_dev->fw_update_status = true;
1590 nsim_dev->fw_update_overwrite_mask = 0;
1591 nsim_dev->fw_update_flash_chunk_time_ms = NSIM_DEV_FLASH_CHUNK_TIME_MS_DEFAULT;
1592 nsim_dev->max_macs = NSIM_DEV_MAX_MACS_DEFAULT;
1593 nsim_dev->test1 = NSIM_DEV_TEST1_DEFAULT;
1594 nsim_dev->test2 = NSIM_DEV_TEST2_DEFAULT;
1595 spin_lock_init(&nsim_dev->fa_cookie_lock);
1596 mutex_init(&nsim_dev->progs_list_lock);
1597
1598 dev_set_drvdata(&nsim_bus_dev->dev, nsim_dev);
1599
1600 nsim_dev->vfconfigs = kzalloc_objs(struct nsim_vf_config,
1601 NSIM_BUS_DEV_MAX_VFS,
1602 GFP_KERNEL | __GFP_NOWARN);
1603 if (!nsim_dev->vfconfigs) {
1604 err = -ENOMEM;
1605 goto err_devlink_unlock;
1606 }
1607
1608 err = devl_register(devlink);
1609 if (err)
1610 goto err_vfc_free;
1611
1612 err = nsim_dev_resources_register(devlink);
1613 if (err)
1614 goto err_dl_unregister;
1615
1616 err = devl_params_register(devlink, nsim_devlink_params,
1617 ARRAY_SIZE(nsim_devlink_params));
1618 if (err)
1619 goto err_resource_unregister;
1620 nsim_devlink_set_params_init_values(nsim_dev, devlink);
1621
1622 err = nsim_dev_dummy_region_init(nsim_dev, devlink);
1623 if (err)
1624 goto err_params_unregister;
1625
1626 err = nsim_dev_traps_init(devlink);
1627 if (err)
1628 goto err_dummy_region_exit;
1629
1630 err = nsim_dev_debugfs_init(nsim_dev);
1631 if (err)
1632 goto err_traps_exit;
1633
1634 nsim_dev->fib_data = nsim_fib_create(devlink, NULL);
1635 if (IS_ERR(nsim_dev->fib_data)) {
1636 err = PTR_ERR(nsim_dev->fib_data);
1637 goto err_debugfs_exit;
1638 }
1639
1640 err = nsim_dev_health_init(nsim_dev, devlink);
1641 if (err)
1642 goto err_fib_destroy;
1643
1644 err = nsim_bpf_dev_init(nsim_dev);
1645 if (err)
1646 goto err_health_exit;
1647
1648 err = nsim_dev_psample_init(nsim_dev);
1649 if (err)
1650 goto err_bpf_dev_exit;
1651
1652 err = nsim_dev_hwstats_init(nsim_dev);
1653 if (err)
1654 goto err_psample_exit;
1655
1656 err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count);
1657 if (err)
1658 goto err_hwstats_exit;
1659
1660 nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_LEGACY;
1661 devl_unlock(devlink);
1662 return 0;
1663
1664err_hwstats_exit:
1665 nsim_dev_hwstats_exit(nsim_dev);
1666err_psample_exit:
1667 nsim_dev_psample_exit(nsim_dev);
1668err_bpf_dev_exit:
1669 nsim_bpf_dev_exit(nsim_dev);
1670err_health_exit:
1671 nsim_dev_health_exit(nsim_dev);
1672err_fib_destroy:
1673 nsim_fib_destroy(devlink, nsim_dev->fib_data);
1674err_debugfs_exit:
1675 nsim_dev_debugfs_exit(nsim_dev);
1676err_traps_exit:
1677 nsim_dev_traps_exit(devlink);
1678err_dummy_region_exit:
1679 nsim_dev_dummy_region_exit(nsim_dev);
1680err_params_unregister:
1681 devl_params_unregister(devlink, nsim_devlink_params,
1682 ARRAY_SIZE(nsim_devlink_params));
1683err_resource_unregister:
1684 devl_resources_unregister(devlink);
1685err_dl_unregister:
1686 devl_unregister(devlink);
1687err_vfc_free:
1688 kfree(nsim_dev->vfconfigs);
1689err_devlink_unlock:
1690 devl_unlock(devlink);
1691 devlink_free(devlink);
1692 dev_set_drvdata(&nsim_bus_dev->dev, NULL);
1693 return err;
1694}
1695
1696static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev)
1697{
1698 struct devlink *devlink = priv_to_devlink(nsim_dev);
1699
1700 if (devlink_is_reload_failed(devlink))
1701 return;
1702 debugfs_remove(nsim_dev->take_snapshot);
1703
1704 if (nsim_dev_get_vfs(nsim_dev)) {
1705 nsim_bus_dev_set_vfs(nsim_dev->nsim_bus_dev, 0);
1706 if (nsim_esw_mode_is_switchdev(nsim_dev))
1707 nsim_esw_legacy_enable(nsim_dev, NULL);
1708 }
1709
1710 nsim_dev_port_del_all(nsim_dev);
1711 nsim_dev_hwstats_exit(nsim_dev);
1712 nsim_dev_psample_exit(nsim_dev);
1713 nsim_dev_health_exit(nsim_dev);
1714 nsim_fib_destroy(devlink, nsim_dev->fib_data);
1715 nsim_dev_traps_exit(devlink);
1716 nsim_dev_dummy_region_exit(nsim_dev);
1717}
1718
1719void nsim_drv_remove(struct nsim_bus_dev *nsim_bus_dev)
1720{
1721 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
1722 struct devlink *devlink = priv_to_devlink(nsim_dev);
1723
1724 devl_lock(devlink);
1725 nsim_dev_reload_destroy(nsim_dev);
1726
1727 nsim_bpf_dev_exit(nsim_dev);
1728 nsim_dev_debugfs_exit(nsim_dev);
1729 devl_params_unregister(devlink, nsim_devlink_params,
1730 ARRAY_SIZE(nsim_devlink_params));
1731 devl_resources_unregister(devlink);
1732 devl_unregister(devlink);
1733 kfree(nsim_dev->vfconfigs);
1734 kfree(nsim_dev->fa_cookie);
1735 mutex_destroy(&nsim_dev->progs_list_lock);
1736 devl_unlock(devlink);
1737 devlink_free(devlink);
1738 dev_set_drvdata(&nsim_bus_dev->dev, NULL);
1739}
1740
1741static struct nsim_dev_port *
1742__nsim_dev_port_lookup(struct nsim_dev *nsim_dev, enum nsim_dev_port_type type,
1743 unsigned int port_index)
1744{
1745 struct nsim_dev_port *nsim_dev_port;
1746
1747 port_index = nsim_dev_port_index(type, port_index);
1748 list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list)
1749 if (nsim_dev_port->port_index == port_index)
1750 return nsim_dev_port;
1751 return NULL;
1752}
1753
1754int nsim_drv_port_add(struct nsim_bus_dev *nsim_bus_dev, enum nsim_dev_port_type type,
1755 unsigned int port_index, u8 perm_addr[ETH_ALEN])
1756{
1757 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
1758 int err;
1759
1760 devl_lock(priv_to_devlink(nsim_dev));
1761 if (__nsim_dev_port_lookup(nsim_dev, type, port_index))
1762 err = -EEXIST;
1763 else
1764 err = __nsim_dev_port_add(nsim_dev, type, port_index, perm_addr);
1765 devl_unlock(priv_to_devlink(nsim_dev));
1766 return err;
1767}
1768
1769int nsim_drv_port_del(struct nsim_bus_dev *nsim_bus_dev, enum nsim_dev_port_type type,
1770 unsigned int port_index)
1771{
1772 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
1773 struct nsim_dev_port *nsim_dev_port;
1774 int err = 0;
1775
1776 devl_lock(priv_to_devlink(nsim_dev));
1777 nsim_dev_port = __nsim_dev_port_lookup(nsim_dev, type, port_index);
1778 if (!nsim_dev_port)
1779 err = -ENOENT;
1780 else
1781 __nsim_dev_port_del(nsim_dev_port);
1782 devl_unlock(priv_to_devlink(nsim_dev));
1783 return err;
1784}
1785
1786int nsim_drv_configure_vfs(struct nsim_bus_dev *nsim_bus_dev,
1787 unsigned int num_vfs)
1788{
1789 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
1790 struct devlink *devlink = priv_to_devlink(nsim_dev);
1791 int ret = 0;
1792
1793 devl_lock(devlink);
1794 if (nsim_bus_dev->num_vfs == num_vfs)
1795 goto exit_unlock;
1796 if (nsim_bus_dev->num_vfs && num_vfs) {
1797 ret = -EBUSY;
1798 goto exit_unlock;
1799 }
1800 if (num_vfs > NSIM_BUS_DEV_MAX_VFS) {
1801 ret = -ENOMEM;
1802 goto exit_unlock;
1803 }
1804
1805 nsim_bus_dev_set_vfs(nsim_bus_dev, num_vfs);
1806 if (nsim_esw_mode_is_switchdev(nsim_dev)) {
1807 if (num_vfs) {
1808 ret = nsim_esw_switchdev_enable(nsim_dev, NULL);
1809 if (ret) {
1810 nsim_bus_dev_set_vfs(nsim_bus_dev, 0);
1811 goto exit_unlock;
1812 }
1813 } else {
1814 nsim_esw_legacy_enable(nsim_dev, NULL);
1815 }
1816 }
1817
1818exit_unlock:
1819 devl_unlock(devlink);
1820
1821 return ret;
1822}
1823
1824int nsim_dev_init(void)
1825{
1826 nsim_dev_ddir = debugfs_create_dir(DRV_NAME, NULL);
1827 return PTR_ERR_OR_ZERO(nsim_dev_ddir);
1828}
1829
1830void nsim_dev_exit(void)
1831{
1832 debugfs_remove_recursive(nsim_dev_ddir);
1833}