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 | |
38 | static unsigned int |
39 | nsim_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 | |
52 | static 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 | |
57 | static struct dentry *nsim_dev_ddir; |
58 | |
59 | unsigned 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 | |
67 | static void |
68 | nsim_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 | |
77 | static int |
78 | nsim_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 | |
96 | static 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 | |
130 | static 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 | |
137 | static 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(size: 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 | |
167 | errout: |
168 | spin_unlock(lock: &nsim_dev->fa_cookie_lock); |
169 | return ret; |
170 | } |
171 | |
172 | static 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(size: 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 | |
212 | free_fa_cookie: |
213 | kfree(objp: fa_cookie); |
214 | free_buf: |
215 | kfree(objp: buf); |
216 | return ret; |
217 | } |
218 | |
219 | static 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 | |
227 | static 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 | |
240 | static 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(n: val, size: 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 | |
291 | static 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 | |
299 | static 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: "max_macs" , mode: 0600, parent: nsim_dev->ddir, |
318 | value: &nsim_dev->max_macs); |
319 | debugfs_create_bool(name: "test1" , mode: 0600, parent: nsim_dev->ddir, |
320 | value: &nsim_dev->test1); |
321 | nsim_dev->take_snapshot = debugfs_create_file(name: "take_snapshot" , |
322 | mode: 0200, |
323 | parent: nsim_dev->ddir, |
324 | data: nsim_dev, |
325 | fops: &nsim_dev_take_snapshot_fops); |
326 | debugfs_create_bool(name: "dont_allow_reload" , mode: 0600, parent: nsim_dev->ddir, |
327 | value: &nsim_dev->dont_allow_reload); |
328 | debugfs_create_bool(name: "fail_reload" , mode: 0600, parent: nsim_dev->ddir, |
329 | value: &nsim_dev->fail_reload); |
330 | debugfs_create_file(name: "trap_flow_action_cookie" , mode: 0600, parent: nsim_dev->ddir, |
331 | data: nsim_dev, fops: &nsim_dev_trap_fa_cookie_fops); |
332 | debugfs_create_bool(name: "fail_trap_group_set" , mode: 0600, |
333 | parent: nsim_dev->ddir, |
334 | value: &nsim_dev->fail_trap_group_set); |
335 | debugfs_create_bool(name: "fail_trap_policer_set" , mode: 0600, |
336 | parent: nsim_dev->ddir, |
337 | value: &nsim_dev->fail_trap_policer_set); |
338 | debugfs_create_bool(name: "fail_trap_policer_counter_get" , mode: 0600, |
339 | parent: nsim_dev->ddir, |
340 | value: &nsim_dev->fail_trap_policer_counter_get); |
341 | /* caution, dev_max_vfs write takes devlink lock */ |
342 | debugfs_create_file(name: "max_vfs" , mode: 0600, parent: nsim_dev->ddir, |
343 | data: nsim_dev, fops: &nsim_dev_max_vfs_fops); |
344 | |
345 | nsim_dev->nodes_ddir = debugfs_create_dir(name: "rate_nodes" , parent: nsim_dev->ddir); |
346 | if (IS_ERR(ptr: nsim_dev->nodes_ddir)) { |
347 | err = PTR_ERR(ptr: nsim_dev->nodes_ddir); |
348 | goto err_ports_ddir; |
349 | } |
350 | debugfs_create_bool(name: "fail_trap_drop_counter_get" , mode: 0600, |
351 | parent: nsim_dev->ddir, |
352 | value: &nsim_dev->fail_trap_drop_counter_get); |
353 | nsim_udp_tunnels_debugfs_create(nsim_dev); |
354 | return 0; |
355 | |
356 | err_ports_ddir: |
357 | debugfs_remove_recursive(dentry: nsim_dev->ports_ddir); |
358 | err_ddir: |
359 | debugfs_remove_recursive(dentry: nsim_dev->ddir); |
360 | return err; |
361 | } |
362 | |
363 | static void nsim_dev_debugfs_exit(struct nsim_dev *nsim_dev) |
364 | { |
365 | debugfs_remove_recursive(dentry: nsim_dev->nodes_ddir); |
366 | debugfs_remove_recursive(dentry: nsim_dev->ports_ddir); |
367 | debugfs_remove_recursive(dentry: nsim_dev->ddir); |
368 | } |
369 | |
370 | static ssize_t nsim_dev_rate_parent_read(struct file *file, |
371 | char __user *data, |
372 | size_t count, loff_t *ppos) |
373 | { |
374 | char **name_ptr = file->private_data; |
375 | size_t len; |
376 | |
377 | if (!*name_ptr) |
378 | return 0; |
379 | |
380 | len = strlen(*name_ptr); |
381 | return simple_read_from_buffer(to: data, count, ppos, from: *name_ptr, available: len); |
382 | } |
383 | |
384 | static const struct file_operations nsim_dev_rate_parent_fops = { |
385 | .open = simple_open, |
386 | .read = nsim_dev_rate_parent_read, |
387 | .llseek = generic_file_llseek, |
388 | .owner = THIS_MODULE, |
389 | }; |
390 | |
391 | static int nsim_dev_port_debugfs_init(struct nsim_dev *nsim_dev, |
392 | struct nsim_dev_port *nsim_dev_port) |
393 | { |
394 | struct nsim_bus_dev *nsim_bus_dev = nsim_dev->nsim_bus_dev; |
395 | unsigned int port_index = nsim_dev_port->port_index; |
396 | char port_ddir_name[16]; |
397 | char dev_link_name[32]; |
398 | |
399 | sprintf(buf: port_ddir_name, fmt: "%u" , port_index); |
400 | nsim_dev_port->ddir = debugfs_create_dir(name: port_ddir_name, |
401 | parent: nsim_dev->ports_ddir); |
402 | if (IS_ERR(ptr: nsim_dev_port->ddir)) |
403 | return PTR_ERR(ptr: nsim_dev_port->ddir); |
404 | |
405 | sprintf(buf: dev_link_name, fmt: "../../../" DRV_NAME "%u" , nsim_bus_dev->dev.id); |
406 | if (nsim_dev_port_is_vf(nsim_dev_port)) { |
407 | unsigned int vf_id = nsim_dev_port_index_to_vf_index(port_index); |
408 | |
409 | debugfs_create_u16(name: "tx_share" , mode: 0400, parent: nsim_dev_port->ddir, |
410 | value: &nsim_dev->vfconfigs[vf_id].min_tx_rate); |
411 | debugfs_create_u16(name: "tx_max" , mode: 0400, parent: nsim_dev_port->ddir, |
412 | value: &nsim_dev->vfconfigs[vf_id].max_tx_rate); |
413 | nsim_dev_port->rate_parent = debugfs_create_file(name: "rate_parent" , |
414 | mode: 0400, |
415 | parent: nsim_dev_port->ddir, |
416 | data: &nsim_dev_port->parent_name, |
417 | fops: &nsim_dev_rate_parent_fops); |
418 | } |
419 | debugfs_create_symlink(name: "dev" , parent: nsim_dev_port->ddir, dest: dev_link_name); |
420 | |
421 | return 0; |
422 | } |
423 | |
424 | static void nsim_dev_port_debugfs_exit(struct nsim_dev_port *nsim_dev_port) |
425 | { |
426 | debugfs_remove_recursive(dentry: nsim_dev_port->ddir); |
427 | } |
428 | |
429 | static int nsim_dev_resources_register(struct devlink *devlink) |
430 | { |
431 | struct devlink_resource_size_params params = { |
432 | .size_max = (u64)-1, |
433 | .size_granularity = 1, |
434 | .unit = DEVLINK_RESOURCE_UNIT_ENTRY |
435 | }; |
436 | int err; |
437 | |
438 | /* Resources for IPv4 */ |
439 | err = devl_resource_register(devlink, resource_name: "IPv4" , resource_size: (u64)-1, |
440 | resource_id: NSIM_RESOURCE_IPV4, |
441 | DEVLINK_RESOURCE_ID_PARENT_TOP, |
442 | size_params: ¶ms); |
443 | if (err) { |
444 | pr_err("Failed to register IPv4 top resource\n" ); |
445 | goto err_out; |
446 | } |
447 | |
448 | err = devl_resource_register(devlink, resource_name: "fib" , resource_size: (u64)-1, |
449 | resource_id: NSIM_RESOURCE_IPV4_FIB, |
450 | parent_resource_id: NSIM_RESOURCE_IPV4, size_params: ¶ms); |
451 | if (err) { |
452 | pr_err("Failed to register IPv4 FIB resource\n" ); |
453 | goto err_out; |
454 | } |
455 | |
456 | err = devl_resource_register(devlink, resource_name: "fib-rules" , resource_size: (u64)-1, |
457 | resource_id: NSIM_RESOURCE_IPV4_FIB_RULES, |
458 | parent_resource_id: NSIM_RESOURCE_IPV4, size_params: ¶ms); |
459 | if (err) { |
460 | pr_err("Failed to register IPv4 FIB rules resource\n" ); |
461 | goto err_out; |
462 | } |
463 | |
464 | /* Resources for IPv6 */ |
465 | err = devl_resource_register(devlink, resource_name: "IPv6" , resource_size: (u64)-1, |
466 | resource_id: NSIM_RESOURCE_IPV6, |
467 | DEVLINK_RESOURCE_ID_PARENT_TOP, |
468 | size_params: ¶ms); |
469 | if (err) { |
470 | pr_err("Failed to register IPv6 top resource\n" ); |
471 | goto err_out; |
472 | } |
473 | |
474 | err = devl_resource_register(devlink, resource_name: "fib" , resource_size: (u64)-1, |
475 | resource_id: NSIM_RESOURCE_IPV6_FIB, |
476 | parent_resource_id: NSIM_RESOURCE_IPV6, size_params: ¶ms); |
477 | if (err) { |
478 | pr_err("Failed to register IPv6 FIB resource\n" ); |
479 | goto err_out; |
480 | } |
481 | |
482 | err = devl_resource_register(devlink, resource_name: "fib-rules" , resource_size: (u64)-1, |
483 | resource_id: NSIM_RESOURCE_IPV6_FIB_RULES, |
484 | parent_resource_id: NSIM_RESOURCE_IPV6, size_params: ¶ms); |
485 | if (err) { |
486 | pr_err("Failed to register IPv6 FIB rules resource\n" ); |
487 | goto err_out; |
488 | } |
489 | |
490 | /* Resources for nexthops */ |
491 | err = devl_resource_register(devlink, resource_name: "nexthops" , resource_size: (u64)-1, |
492 | resource_id: NSIM_RESOURCE_NEXTHOPS, |
493 | DEVLINK_RESOURCE_ID_PARENT_TOP, |
494 | size_params: ¶ms); |
495 | if (err) { |
496 | pr_err("Failed to register NEXTHOPS resource\n" ); |
497 | goto err_out; |
498 | } |
499 | return 0; |
500 | |
501 | err_out: |
502 | devl_resources_unregister(devlink); |
503 | return err; |
504 | } |
505 | |
506 | enum nsim_devlink_param_id { |
507 | NSIM_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX, |
508 | NSIM_DEVLINK_PARAM_ID_TEST1, |
509 | }; |
510 | |
511 | static const struct devlink_param nsim_devlink_params[] = { |
512 | DEVLINK_PARAM_GENERIC(MAX_MACS, |
513 | BIT(DEVLINK_PARAM_CMODE_DRIVERINIT), |
514 | NULL, NULL, NULL), |
515 | DEVLINK_PARAM_DRIVER(NSIM_DEVLINK_PARAM_ID_TEST1, |
516 | "test1" , DEVLINK_PARAM_TYPE_BOOL, |
517 | BIT(DEVLINK_PARAM_CMODE_DRIVERINIT), |
518 | NULL, NULL, NULL), |
519 | }; |
520 | |
521 | static void nsim_devlink_set_params_init_values(struct nsim_dev *nsim_dev, |
522 | struct devlink *devlink) |
523 | { |
524 | union devlink_param_value value; |
525 | |
526 | value.vu32 = nsim_dev->max_macs; |
527 | devl_param_driverinit_value_set(devlink, |
528 | param_id: DEVLINK_PARAM_GENERIC_ID_MAX_MACS, |
529 | init_val: value); |
530 | value.vbool = nsim_dev->test1; |
531 | devl_param_driverinit_value_set(devlink, |
532 | param_id: NSIM_DEVLINK_PARAM_ID_TEST1, |
533 | init_val: value); |
534 | } |
535 | |
536 | static void nsim_devlink_param_load_driverinit_values(struct devlink *devlink) |
537 | { |
538 | struct nsim_dev *nsim_dev = devlink_priv(devlink); |
539 | union devlink_param_value saved_value; |
540 | int err; |
541 | |
542 | err = devl_param_driverinit_value_get(devlink, |
543 | param_id: DEVLINK_PARAM_GENERIC_ID_MAX_MACS, |
544 | val: &saved_value); |
545 | if (!err) |
546 | nsim_dev->max_macs = saved_value.vu32; |
547 | err = devl_param_driverinit_value_get(devlink, |
548 | param_id: NSIM_DEVLINK_PARAM_ID_TEST1, |
549 | val: &saved_value); |
550 | if (!err) |
551 | nsim_dev->test1 = saved_value.vbool; |
552 | } |
553 | |
554 | #define NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX 16 |
555 | |
556 | static const struct devlink_region_ops dummy_region_ops = { |
557 | .name = "dummy" , |
558 | .destructor = &kfree, |
559 | .snapshot = nsim_dev_take_snapshot, |
560 | }; |
561 | |
562 | static int nsim_dev_dummy_region_init(struct nsim_dev *nsim_dev, |
563 | struct devlink *devlink) |
564 | { |
565 | nsim_dev->dummy_region = |
566 | devl_region_create(devlink, ops: &dummy_region_ops, |
567 | NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX, |
568 | NSIM_DEV_DUMMY_REGION_SIZE); |
569 | return PTR_ERR_OR_ZERO(ptr: nsim_dev->dummy_region); |
570 | } |
571 | |
572 | static void nsim_dev_dummy_region_exit(struct nsim_dev *nsim_dev) |
573 | { |
574 | devl_region_destroy(region: nsim_dev->dummy_region); |
575 | } |
576 | |
577 | static int |
578 | __nsim_dev_port_add(struct nsim_dev *nsim_dev, enum nsim_dev_port_type type, |
579 | unsigned int port_index); |
580 | static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port); |
581 | |
582 | static int nsim_esw_legacy_enable(struct nsim_dev *nsim_dev, |
583 | struct netlink_ext_ack *extack) |
584 | { |
585 | struct devlink *devlink = priv_to_devlink(priv: nsim_dev); |
586 | struct nsim_dev_port *nsim_dev_port, *tmp; |
587 | |
588 | devl_rate_nodes_destroy(devlink); |
589 | list_for_each_entry_safe(nsim_dev_port, tmp, &nsim_dev->port_list, list) |
590 | if (nsim_dev_port_is_vf(nsim_dev_port)) |
591 | __nsim_dev_port_del(nsim_dev_port); |
592 | nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_LEGACY; |
593 | return 0; |
594 | } |
595 | |
596 | static int nsim_esw_switchdev_enable(struct nsim_dev *nsim_dev, |
597 | struct netlink_ext_ack *extack) |
598 | { |
599 | struct nsim_dev_port *nsim_dev_port, *tmp; |
600 | int i, err; |
601 | |
602 | for (i = 0; i < nsim_dev_get_vfs(nsim_dev); i++) { |
603 | err = __nsim_dev_port_add(nsim_dev, type: NSIM_DEV_PORT_TYPE_VF, port_index: i); |
604 | if (err) { |
605 | NL_SET_ERR_MSG_MOD(extack, "Failed to initialize VFs' netdevsim ports" ); |
606 | pr_err("Failed to initialize VF id=%d. %d.\n" , i, err); |
607 | goto err_port_add_vfs; |
608 | } |
609 | } |
610 | nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_SWITCHDEV; |
611 | return 0; |
612 | |
613 | err_port_add_vfs: |
614 | list_for_each_entry_safe(nsim_dev_port, tmp, &nsim_dev->port_list, list) |
615 | if (nsim_dev_port_is_vf(nsim_dev_port)) |
616 | __nsim_dev_port_del(nsim_dev_port); |
617 | return err; |
618 | } |
619 | |
620 | static int nsim_devlink_eswitch_mode_set(struct devlink *devlink, u16 mode, |
621 | struct netlink_ext_ack *extack) |
622 | { |
623 | struct nsim_dev *nsim_dev = devlink_priv(devlink); |
624 | |
625 | if (mode == nsim_dev->esw_mode) |
626 | return 0; |
627 | |
628 | if (mode == DEVLINK_ESWITCH_MODE_LEGACY) |
629 | return nsim_esw_legacy_enable(nsim_dev, extack); |
630 | if (mode == DEVLINK_ESWITCH_MODE_SWITCHDEV) |
631 | return nsim_esw_switchdev_enable(nsim_dev, extack); |
632 | |
633 | return -EINVAL; |
634 | } |
635 | |
636 | static int nsim_devlink_eswitch_mode_get(struct devlink *devlink, u16 *mode) |
637 | { |
638 | struct nsim_dev *nsim_dev = devlink_priv(devlink); |
639 | |
640 | *mode = nsim_dev->esw_mode; |
641 | return 0; |
642 | } |
643 | |
644 | struct nsim_trap_item { |
645 | void *trap_ctx; |
646 | enum devlink_trap_action action; |
647 | }; |
648 | |
649 | struct nsim_trap_data { |
650 | struct delayed_work trap_report_dw; |
651 | struct nsim_trap_item *trap_items_arr; |
652 | u64 *trap_policers_cnt_arr; |
653 | u64 trap_pkt_cnt; |
654 | struct nsim_dev *nsim_dev; |
655 | spinlock_t trap_lock; /* Protects trap_items_arr */ |
656 | }; |
657 | |
658 | /* All driver-specific traps must be documented in |
659 | * Documentation/networking/devlink/netdevsim.rst |
660 | */ |
661 | enum { |
662 | NSIM_TRAP_ID_BASE = DEVLINK_TRAP_GENERIC_ID_MAX, |
663 | NSIM_TRAP_ID_FID_MISS, |
664 | }; |
665 | |
666 | #define NSIM_TRAP_NAME_FID_MISS "fid_miss" |
667 | |
668 | #define NSIM_TRAP_METADATA DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT |
669 | |
670 | #define NSIM_TRAP_DROP(_id, _group_id) \ |
671 | DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \ |
672 | DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ |
673 | NSIM_TRAP_METADATA) |
674 | #define NSIM_TRAP_DROP_EXT(_id, _group_id, _metadata) \ |
675 | DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \ |
676 | DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ |
677 | NSIM_TRAP_METADATA | (_metadata)) |
678 | #define NSIM_TRAP_EXCEPTION(_id, _group_id) \ |
679 | DEVLINK_TRAP_GENERIC(EXCEPTION, TRAP, _id, \ |
680 | DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ |
681 | NSIM_TRAP_METADATA) |
682 | #define NSIM_TRAP_CONTROL(_id, _group_id, _action) \ |
683 | DEVLINK_TRAP_GENERIC(CONTROL, _action, _id, \ |
684 | DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ |
685 | NSIM_TRAP_METADATA) |
686 | #define NSIM_TRAP_DRIVER_EXCEPTION(_id, _group_id) \ |
687 | DEVLINK_TRAP_DRIVER(EXCEPTION, TRAP, NSIM_TRAP_ID_##_id, \ |
688 | NSIM_TRAP_NAME_##_id, \ |
689 | DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ |
690 | NSIM_TRAP_METADATA) |
691 | |
692 | #define NSIM_DEV_TRAP_POLICER_MIN_RATE 1 |
693 | #define NSIM_DEV_TRAP_POLICER_MAX_RATE 8000 |
694 | #define NSIM_DEV_TRAP_POLICER_MIN_BURST 8 |
695 | #define NSIM_DEV_TRAP_POLICER_MAX_BURST 65536 |
696 | |
697 | #define NSIM_TRAP_POLICER(_id, _rate, _burst) \ |
698 | DEVLINK_TRAP_POLICER(_id, _rate, _burst, \ |
699 | NSIM_DEV_TRAP_POLICER_MAX_RATE, \ |
700 | NSIM_DEV_TRAP_POLICER_MIN_RATE, \ |
701 | NSIM_DEV_TRAP_POLICER_MAX_BURST, \ |
702 | NSIM_DEV_TRAP_POLICER_MIN_BURST) |
703 | |
704 | static const struct devlink_trap_policer nsim_trap_policers_arr[] = { |
705 | NSIM_TRAP_POLICER(1, 1000, 128), |
706 | NSIM_TRAP_POLICER(2, 2000, 256), |
707 | NSIM_TRAP_POLICER(3, 3000, 512), |
708 | }; |
709 | |
710 | static const struct devlink_trap_group nsim_trap_groups_arr[] = { |
711 | DEVLINK_TRAP_GROUP_GENERIC(L2_DROPS, 0), |
712 | DEVLINK_TRAP_GROUP_GENERIC(L3_DROPS, 1), |
713 | DEVLINK_TRAP_GROUP_GENERIC(L3_EXCEPTIONS, 1), |
714 | DEVLINK_TRAP_GROUP_GENERIC(BUFFER_DROPS, 2), |
715 | DEVLINK_TRAP_GROUP_GENERIC(ACL_DROPS, 3), |
716 | DEVLINK_TRAP_GROUP_GENERIC(MC_SNOOPING, 3), |
717 | }; |
718 | |
719 | static const struct devlink_trap nsim_traps_arr[] = { |
720 | NSIM_TRAP_DROP(SMAC_MC, L2_DROPS), |
721 | NSIM_TRAP_DROP(VLAN_TAG_MISMATCH, L2_DROPS), |
722 | NSIM_TRAP_DROP(INGRESS_VLAN_FILTER, L2_DROPS), |
723 | NSIM_TRAP_DROP(INGRESS_STP_FILTER, L2_DROPS), |
724 | NSIM_TRAP_DROP(EMPTY_TX_LIST, L2_DROPS), |
725 | NSIM_TRAP_DROP(PORT_LOOPBACK_FILTER, L2_DROPS), |
726 | NSIM_TRAP_DRIVER_EXCEPTION(FID_MISS, L2_DROPS), |
727 | NSIM_TRAP_DROP(BLACKHOLE_ROUTE, L3_DROPS), |
728 | NSIM_TRAP_EXCEPTION(TTL_ERROR, L3_EXCEPTIONS), |
729 | NSIM_TRAP_DROP(TAIL_DROP, BUFFER_DROPS), |
730 | NSIM_TRAP_DROP_EXT(INGRESS_FLOW_ACTION_DROP, ACL_DROPS, |
731 | DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE), |
732 | NSIM_TRAP_DROP_EXT(EGRESS_FLOW_ACTION_DROP, ACL_DROPS, |
733 | DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE), |
734 | NSIM_TRAP_CONTROL(IGMP_QUERY, MC_SNOOPING, MIRROR), |
735 | NSIM_TRAP_CONTROL(IGMP_V1_REPORT, MC_SNOOPING, TRAP), |
736 | }; |
737 | |
738 | #define NSIM_TRAP_L4_DATA_LEN 100 |
739 | |
740 | static struct sk_buff *nsim_dev_trap_skb_build(void) |
741 | { |
742 | int tot_len, data_len = NSIM_TRAP_L4_DATA_LEN; |
743 | struct sk_buff *skb; |
744 | struct udphdr *udph; |
745 | struct ethhdr *eth; |
746 | struct iphdr *iph; |
747 | |
748 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); |
749 | if (!skb) |
750 | return NULL; |
751 | tot_len = sizeof(struct iphdr) + sizeof(struct udphdr) + data_len; |
752 | |
753 | skb_reset_mac_header(skb); |
754 | eth = skb_put(skb, len: sizeof(struct ethhdr)); |
755 | eth_random_addr(addr: eth->h_dest); |
756 | eth_random_addr(addr: eth->h_source); |
757 | eth->h_proto = htons(ETH_P_IP); |
758 | skb->protocol = htons(ETH_P_IP); |
759 | |
760 | skb_set_network_header(skb, offset: skb->len); |
761 | iph = skb_put(skb, len: sizeof(struct iphdr)); |
762 | iph->protocol = IPPROTO_UDP; |
763 | iph->saddr = in_aton(str: "192.0.2.1" ); |
764 | iph->daddr = in_aton(str: "198.51.100.1" ); |
765 | iph->version = 0x4; |
766 | iph->frag_off = 0; |
767 | iph->ihl = 0x5; |
768 | iph->tot_len = htons(tot_len); |
769 | iph->ttl = 100; |
770 | iph->check = 0; |
771 | iph->check = ip_fast_csum(iph: (unsigned char *)iph, ihl: iph->ihl); |
772 | |
773 | skb_set_transport_header(skb, offset: skb->len); |
774 | udph = skb_put_zero(skb, len: sizeof(struct udphdr) + data_len); |
775 | get_random_bytes(buf: &udph->source, len: sizeof(u16)); |
776 | get_random_bytes(buf: &udph->dest, len: sizeof(u16)); |
777 | udph->len = htons(sizeof(struct udphdr) + data_len); |
778 | |
779 | return skb; |
780 | } |
781 | |
782 | static void nsim_dev_trap_report(struct nsim_dev_port *nsim_dev_port) |
783 | { |
784 | struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev; |
785 | struct devlink *devlink = priv_to_devlink(priv: nsim_dev); |
786 | struct nsim_trap_data *nsim_trap_data; |
787 | int i; |
788 | |
789 | nsim_trap_data = nsim_dev->trap_data; |
790 | |
791 | spin_lock(lock: &nsim_trap_data->trap_lock); |
792 | for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) { |
793 | struct flow_action_cookie *fa_cookie = NULL; |
794 | struct nsim_trap_item *nsim_trap_item; |
795 | struct sk_buff *skb; |
796 | bool has_fa_cookie; |
797 | |
798 | has_fa_cookie = nsim_traps_arr[i].metadata_cap & |
799 | DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE; |
800 | |
801 | nsim_trap_item = &nsim_trap_data->trap_items_arr[i]; |
802 | if (nsim_trap_item->action == DEVLINK_TRAP_ACTION_DROP) |
803 | continue; |
804 | |
805 | skb = nsim_dev_trap_skb_build(); |
806 | if (!skb) |
807 | continue; |
808 | skb->dev = nsim_dev_port->ns->netdev; |
809 | |
810 | /* Trapped packets are usually passed to devlink in softIRQ, |
811 | * but in this case they are generated in a workqueue. Disable |
812 | * softIRQs to prevent lockdep from complaining about |
813 | * "incosistent lock state". |
814 | */ |
815 | |
816 | spin_lock_bh(lock: &nsim_dev->fa_cookie_lock); |
817 | fa_cookie = has_fa_cookie ? nsim_dev->fa_cookie : NULL; |
818 | devlink_trap_report(devlink, skb, trap_ctx: nsim_trap_item->trap_ctx, |
819 | in_devlink_port: &nsim_dev_port->devlink_port, fa_cookie); |
820 | spin_unlock_bh(lock: &nsim_dev->fa_cookie_lock); |
821 | consume_skb(skb); |
822 | } |
823 | spin_unlock(lock: &nsim_trap_data->trap_lock); |
824 | } |
825 | |
826 | #define NSIM_TRAP_REPORT_INTERVAL_MS 100 |
827 | |
828 | static void nsim_dev_trap_report_work(struct work_struct *work) |
829 | { |
830 | struct nsim_trap_data *nsim_trap_data; |
831 | struct nsim_dev_port *nsim_dev_port; |
832 | struct nsim_dev *nsim_dev; |
833 | |
834 | nsim_trap_data = container_of(work, struct nsim_trap_data, |
835 | trap_report_dw.work); |
836 | nsim_dev = nsim_trap_data->nsim_dev; |
837 | |
838 | if (!devl_trylock(devlink: priv_to_devlink(priv: nsim_dev))) { |
839 | schedule_delayed_work(dwork: &nsim_dev->trap_data->trap_report_dw, delay: 1); |
840 | return; |
841 | } |
842 | |
843 | /* For each running port and enabled packet trap, generate a UDP |
844 | * packet with a random 5-tuple and report it. |
845 | */ |
846 | list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list) { |
847 | if (!netif_running(dev: nsim_dev_port->ns->netdev)) |
848 | continue; |
849 | |
850 | nsim_dev_trap_report(nsim_dev_port); |
851 | } |
852 | devl_unlock(devlink: priv_to_devlink(priv: nsim_dev)); |
853 | |
854 | schedule_delayed_work(dwork: &nsim_dev->trap_data->trap_report_dw, |
855 | delay: msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS)); |
856 | } |
857 | |
858 | static int nsim_dev_traps_init(struct devlink *devlink) |
859 | { |
860 | size_t policers_count = ARRAY_SIZE(nsim_trap_policers_arr); |
861 | struct nsim_dev *nsim_dev = devlink_priv(devlink); |
862 | struct nsim_trap_data *nsim_trap_data; |
863 | int err; |
864 | |
865 | nsim_trap_data = kzalloc(size: sizeof(*nsim_trap_data), GFP_KERNEL); |
866 | if (!nsim_trap_data) |
867 | return -ENOMEM; |
868 | |
869 | nsim_trap_data->trap_items_arr = kcalloc(ARRAY_SIZE(nsim_traps_arr), |
870 | size: sizeof(struct nsim_trap_item), |
871 | GFP_KERNEL); |
872 | if (!nsim_trap_data->trap_items_arr) { |
873 | err = -ENOMEM; |
874 | goto err_trap_data_free; |
875 | } |
876 | |
877 | nsim_trap_data->trap_policers_cnt_arr = kcalloc(n: policers_count, |
878 | size: sizeof(u64), |
879 | GFP_KERNEL); |
880 | if (!nsim_trap_data->trap_policers_cnt_arr) { |
881 | err = -ENOMEM; |
882 | goto err_trap_items_free; |
883 | } |
884 | |
885 | /* The lock is used to protect the action state of the registered |
886 | * traps. The value is written by user and read in delayed work when |
887 | * iterating over all the traps. |
888 | */ |
889 | spin_lock_init(&nsim_trap_data->trap_lock); |
890 | nsim_trap_data->nsim_dev = nsim_dev; |
891 | nsim_dev->trap_data = nsim_trap_data; |
892 | |
893 | err = devl_trap_policers_register(devlink, policers: nsim_trap_policers_arr, |
894 | policers_count); |
895 | if (err) |
896 | goto err_trap_policers_cnt_free; |
897 | |
898 | err = devl_trap_groups_register(devlink, groups: nsim_trap_groups_arr, |
899 | ARRAY_SIZE(nsim_trap_groups_arr)); |
900 | if (err) |
901 | goto err_trap_policers_unregister; |
902 | |
903 | err = devl_traps_register(devlink, traps: nsim_traps_arr, |
904 | ARRAY_SIZE(nsim_traps_arr), NULL); |
905 | if (err) |
906 | goto err_trap_groups_unregister; |
907 | |
908 | INIT_DELAYED_WORK(&nsim_dev->trap_data->trap_report_dw, |
909 | nsim_dev_trap_report_work); |
910 | schedule_delayed_work(dwork: &nsim_dev->trap_data->trap_report_dw, |
911 | delay: msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS)); |
912 | |
913 | return 0; |
914 | |
915 | err_trap_groups_unregister: |
916 | devl_trap_groups_unregister(devlink, groups: nsim_trap_groups_arr, |
917 | ARRAY_SIZE(nsim_trap_groups_arr)); |
918 | err_trap_policers_unregister: |
919 | devl_trap_policers_unregister(devlink, policers: nsim_trap_policers_arr, |
920 | ARRAY_SIZE(nsim_trap_policers_arr)); |
921 | err_trap_policers_cnt_free: |
922 | kfree(objp: nsim_trap_data->trap_policers_cnt_arr); |
923 | err_trap_items_free: |
924 | kfree(objp: nsim_trap_data->trap_items_arr); |
925 | err_trap_data_free: |
926 | kfree(objp: nsim_trap_data); |
927 | return err; |
928 | } |
929 | |
930 | static void nsim_dev_traps_exit(struct devlink *devlink) |
931 | { |
932 | struct nsim_dev *nsim_dev = devlink_priv(devlink); |
933 | |
934 | /* caution, trap work takes devlink lock */ |
935 | cancel_delayed_work_sync(dwork: &nsim_dev->trap_data->trap_report_dw); |
936 | devl_traps_unregister(devlink, traps: nsim_traps_arr, |
937 | ARRAY_SIZE(nsim_traps_arr)); |
938 | devl_trap_groups_unregister(devlink, groups: nsim_trap_groups_arr, |
939 | ARRAY_SIZE(nsim_trap_groups_arr)); |
940 | devl_trap_policers_unregister(devlink, policers: nsim_trap_policers_arr, |
941 | ARRAY_SIZE(nsim_trap_policers_arr)); |
942 | kfree(objp: nsim_dev->trap_data->trap_policers_cnt_arr); |
943 | kfree(objp: nsim_dev->trap_data->trap_items_arr); |
944 | kfree(objp: nsim_dev->trap_data); |
945 | } |
946 | |
947 | static int nsim_dev_reload_create(struct nsim_dev *nsim_dev, |
948 | struct netlink_ext_ack *extack); |
949 | static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev); |
950 | |
951 | static int nsim_dev_reload_down(struct devlink *devlink, bool netns_change, |
952 | enum devlink_reload_action action, enum devlink_reload_limit limit, |
953 | struct netlink_ext_ack *extack) |
954 | { |
955 | struct nsim_dev *nsim_dev = devlink_priv(devlink); |
956 | |
957 | if (nsim_dev->dont_allow_reload) { |
958 | /* For testing purposes, user set debugfs dont_allow_reload |
959 | * value to true. So forbid it. |
960 | */ |
961 | NL_SET_ERR_MSG_MOD(extack, "User forbid the reload for testing purposes" ); |
962 | return -EOPNOTSUPP; |
963 | } |
964 | |
965 | nsim_dev_reload_destroy(nsim_dev); |
966 | return 0; |
967 | } |
968 | |
969 | static int nsim_dev_reload_up(struct devlink *devlink, enum devlink_reload_action action, |
970 | enum devlink_reload_limit limit, u32 *actions_performed, |
971 | struct netlink_ext_ack *extack) |
972 | { |
973 | struct nsim_dev *nsim_dev = devlink_priv(devlink); |
974 | |
975 | if (nsim_dev->fail_reload) { |
976 | /* For testing purposes, user set debugfs fail_reload |
977 | * value to true. Fail right away. |
978 | */ |
979 | NL_SET_ERR_MSG_MOD(extack, "User setup the reload to fail for testing purposes" ); |
980 | return -EINVAL; |
981 | } |
982 | |
983 | *actions_performed = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT); |
984 | |
985 | return nsim_dev_reload_create(nsim_dev, extack); |
986 | } |
987 | |
988 | static int nsim_dev_info_get(struct devlink *devlink, |
989 | struct devlink_info_req *req, |
990 | struct netlink_ext_ack *extack) |
991 | { |
992 | int err; |
993 | |
994 | err = devlink_info_version_stored_put_ext(req, version_name: "fw.mgmt" , version_value: "10.20.30" , |
995 | version_type: DEVLINK_INFO_VERSION_TYPE_COMPONENT); |
996 | if (err) |
997 | return err; |
998 | return devlink_info_version_running_put_ext(req, version_name: "fw.mgmt" , version_value: "10.20.30" , |
999 | version_type: DEVLINK_INFO_VERSION_TYPE_COMPONENT); |
1000 | } |
1001 | |
1002 | #define NSIM_DEV_FLASH_SIZE 500000 |
1003 | #define NSIM_DEV_FLASH_CHUNK_SIZE 1000 |
1004 | #define NSIM_DEV_FLASH_CHUNK_TIME_MS 10 |
1005 | |
1006 | static int nsim_dev_flash_update(struct devlink *devlink, |
1007 | struct devlink_flash_update_params *params, |
1008 | struct netlink_ext_ack *extack) |
1009 | { |
1010 | struct nsim_dev *nsim_dev = devlink_priv(devlink); |
1011 | int i; |
1012 | |
1013 | if ((params->overwrite_mask & ~nsim_dev->fw_update_overwrite_mask) != 0) |
1014 | return -EOPNOTSUPP; |
1015 | |
1016 | if (nsim_dev->fw_update_status) { |
1017 | devlink_flash_update_status_notify(devlink, |
1018 | status_msg: "Preparing to flash" , |
1019 | component: params->component, done: 0, total: 0); |
1020 | } |
1021 | |
1022 | for (i = 0; i < NSIM_DEV_FLASH_SIZE / NSIM_DEV_FLASH_CHUNK_SIZE; i++) { |
1023 | if (nsim_dev->fw_update_status) |
1024 | devlink_flash_update_status_notify(devlink, status_msg: "Flashing" , |
1025 | component: params->component, |
1026 | done: i * NSIM_DEV_FLASH_CHUNK_SIZE, |
1027 | NSIM_DEV_FLASH_SIZE); |
1028 | msleep(NSIM_DEV_FLASH_CHUNK_TIME_MS); |
1029 | } |
1030 | |
1031 | if (nsim_dev->fw_update_status) { |
1032 | devlink_flash_update_status_notify(devlink, status_msg: "Flashing" , |
1033 | component: params->component, |
1034 | NSIM_DEV_FLASH_SIZE, |
1035 | NSIM_DEV_FLASH_SIZE); |
1036 | devlink_flash_update_timeout_notify(devlink, status_msg: "Flash select" , |
1037 | component: params->component, timeout: 81); |
1038 | devlink_flash_update_status_notify(devlink, status_msg: "Flashing done" , |
1039 | component: params->component, done: 0, total: 0); |
1040 | } |
1041 | |
1042 | return 0; |
1043 | } |
1044 | |
1045 | static struct nsim_trap_item * |
1046 | nsim_dev_trap_item_lookup(struct nsim_dev *nsim_dev, u16 trap_id) |
1047 | { |
1048 | struct nsim_trap_data *nsim_trap_data = nsim_dev->trap_data; |
1049 | int i; |
1050 | |
1051 | for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) { |
1052 | if (nsim_traps_arr[i].id == trap_id) |
1053 | return &nsim_trap_data->trap_items_arr[i]; |
1054 | } |
1055 | |
1056 | return NULL; |
1057 | } |
1058 | |
1059 | static int nsim_dev_devlink_trap_init(struct devlink *devlink, |
1060 | const struct devlink_trap *trap, |
1061 | void *trap_ctx) |
1062 | { |
1063 | struct nsim_dev *nsim_dev = devlink_priv(devlink); |
1064 | struct nsim_trap_item *nsim_trap_item; |
1065 | |
1066 | nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap_id: trap->id); |
1067 | if (WARN_ON(!nsim_trap_item)) |
1068 | return -ENOENT; |
1069 | |
1070 | nsim_trap_item->trap_ctx = trap_ctx; |
1071 | nsim_trap_item->action = trap->init_action; |
1072 | |
1073 | return 0; |
1074 | } |
1075 | |
1076 | static int |
1077 | nsim_dev_devlink_trap_action_set(struct devlink *devlink, |
1078 | const struct devlink_trap *trap, |
1079 | enum devlink_trap_action action, |
1080 | struct netlink_ext_ack *extack) |
1081 | { |
1082 | struct nsim_dev *nsim_dev = devlink_priv(devlink); |
1083 | struct nsim_trap_item *nsim_trap_item; |
1084 | |
1085 | nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap_id: trap->id); |
1086 | if (WARN_ON(!nsim_trap_item)) |
1087 | return -ENOENT; |
1088 | |
1089 | spin_lock(lock: &nsim_dev->trap_data->trap_lock); |
1090 | nsim_trap_item->action = action; |
1091 | spin_unlock(lock: &nsim_dev->trap_data->trap_lock); |
1092 | |
1093 | return 0; |
1094 | } |
1095 | |
1096 | static int |
1097 | nsim_dev_devlink_trap_group_set(struct devlink *devlink, |
1098 | const struct devlink_trap_group *group, |
1099 | const struct devlink_trap_policer *policer, |
1100 | struct netlink_ext_ack *extack) |
1101 | { |
1102 | struct nsim_dev *nsim_dev = devlink_priv(devlink); |
1103 | |
1104 | if (nsim_dev->fail_trap_group_set) |
1105 | return -EINVAL; |
1106 | |
1107 | return 0; |
1108 | } |
1109 | |
1110 | static int |
1111 | nsim_dev_devlink_trap_policer_set(struct devlink *devlink, |
1112 | const struct devlink_trap_policer *policer, |
1113 | u64 rate, u64 burst, |
1114 | struct netlink_ext_ack *extack) |
1115 | { |
1116 | struct nsim_dev *nsim_dev = devlink_priv(devlink); |
1117 | |
1118 | if (nsim_dev->fail_trap_policer_set) { |
1119 | NL_SET_ERR_MSG_MOD(extack, "User setup the operation to fail for testing purposes" ); |
1120 | return -EINVAL; |
1121 | } |
1122 | |
1123 | return 0; |
1124 | } |
1125 | |
1126 | static int |
1127 | nsim_dev_devlink_trap_policer_counter_get(struct devlink *devlink, |
1128 | const struct devlink_trap_policer *policer, |
1129 | u64 *p_drops) |
1130 | { |
1131 | struct nsim_dev *nsim_dev = devlink_priv(devlink); |
1132 | u64 *cnt; |
1133 | |
1134 | if (nsim_dev->fail_trap_policer_counter_get) |
1135 | return -EINVAL; |
1136 | |
1137 | cnt = &nsim_dev->trap_data->trap_policers_cnt_arr[policer->id - 1]; |
1138 | *p_drops = (*cnt)++; |
1139 | |
1140 | return 0; |
1141 | } |
1142 | |
1143 | #define NSIM_LINK_SPEED_MAX 5000 /* Mbps */ |
1144 | #define NSIM_LINK_SPEED_UNIT 125000 /* 1 Mbps given in bytes/sec to avoid |
1145 | * u64 overflow during conversion from |
1146 | * bytes to bits. |
1147 | */ |
1148 | |
1149 | static int nsim_rate_bytes_to_units(char *name, u64 *rate, struct netlink_ext_ack *extack) |
1150 | { |
1151 | u64 val; |
1152 | u32 rem; |
1153 | |
1154 | val = div_u64_rem(dividend: *rate, NSIM_LINK_SPEED_UNIT, remainder: &rem); |
1155 | if (rem) { |
1156 | pr_err("%s rate value %lluBps not in link speed units of 1Mbps.\n" , |
1157 | name, *rate); |
1158 | NL_SET_ERR_MSG_MOD(extack, "TX rate value not in link speed units of 1Mbps." ); |
1159 | return -EINVAL; |
1160 | } |
1161 | |
1162 | if (val > NSIM_LINK_SPEED_MAX) { |
1163 | pr_err("%s rate value %lluMbps exceed link maximum speed 5000Mbps.\n" , |
1164 | name, val); |
1165 | NL_SET_ERR_MSG_MOD(extack, "TX rate value exceed link maximum speed 5000Mbps." ); |
1166 | return -EINVAL; |
1167 | } |
1168 | *rate = val; |
1169 | return 0; |
1170 | } |
1171 | |
1172 | static int nsim_leaf_tx_share_set(struct devlink_rate *devlink_rate, void *priv, |
1173 | u64 tx_share, struct netlink_ext_ack *extack) |
1174 | { |
1175 | struct nsim_dev_port *nsim_dev_port = priv; |
1176 | struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev; |
1177 | int vf_id = nsim_dev_port_index_to_vf_index(port_index: nsim_dev_port->port_index); |
1178 | int err; |
1179 | |
1180 | err = nsim_rate_bytes_to_units(name: "tx_share" , rate: &tx_share, extack); |
1181 | if (err) |
1182 | return err; |
1183 | |
1184 | nsim_dev->vfconfigs[vf_id].min_tx_rate = tx_share; |
1185 | return 0; |
1186 | } |
1187 | |
1188 | static int nsim_leaf_tx_max_set(struct devlink_rate *devlink_rate, void *priv, |
1189 | u64 tx_max, struct netlink_ext_ack *extack) |
1190 | { |
1191 | struct nsim_dev_port *nsim_dev_port = priv; |
1192 | struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev; |
1193 | int vf_id = nsim_dev_port_index_to_vf_index(port_index: nsim_dev_port->port_index); |
1194 | int err; |
1195 | |
1196 | err = nsim_rate_bytes_to_units(name: "tx_max" , rate: &tx_max, extack); |
1197 | if (err) |
1198 | return err; |
1199 | |
1200 | nsim_dev->vfconfigs[vf_id].max_tx_rate = tx_max; |
1201 | return 0; |
1202 | } |
1203 | |
1204 | struct nsim_rate_node { |
1205 | struct dentry *ddir; |
1206 | struct dentry *rate_parent; |
1207 | char *parent_name; |
1208 | u16 tx_share; |
1209 | u16 tx_max; |
1210 | }; |
1211 | |
1212 | static int nsim_node_tx_share_set(struct devlink_rate *devlink_rate, void *priv, |
1213 | u64 tx_share, struct netlink_ext_ack *extack) |
1214 | { |
1215 | struct nsim_rate_node *nsim_node = priv; |
1216 | int err; |
1217 | |
1218 | err = nsim_rate_bytes_to_units(name: "tx_share" , rate: &tx_share, extack); |
1219 | if (err) |
1220 | return err; |
1221 | |
1222 | nsim_node->tx_share = tx_share; |
1223 | return 0; |
1224 | } |
1225 | |
1226 | static int nsim_node_tx_max_set(struct devlink_rate *devlink_rate, void *priv, |
1227 | u64 tx_max, struct netlink_ext_ack *extack) |
1228 | { |
1229 | struct nsim_rate_node *nsim_node = priv; |
1230 | int err; |
1231 | |
1232 | err = nsim_rate_bytes_to_units(name: "tx_max" , rate: &tx_max, extack); |
1233 | if (err) |
1234 | return err; |
1235 | |
1236 | nsim_node->tx_max = tx_max; |
1237 | return 0; |
1238 | } |
1239 | |
1240 | static int nsim_rate_node_new(struct devlink_rate *node, void **priv, |
1241 | struct netlink_ext_ack *extack) |
1242 | { |
1243 | struct nsim_dev *nsim_dev = devlink_priv(devlink: node->devlink); |
1244 | struct nsim_rate_node *nsim_node; |
1245 | |
1246 | if (!nsim_esw_mode_is_switchdev(nsim_dev)) { |
1247 | NL_SET_ERR_MSG_MOD(extack, "Node creation allowed only in switchdev mode." ); |
1248 | return -EOPNOTSUPP; |
1249 | } |
1250 | |
1251 | nsim_node = kzalloc(size: sizeof(*nsim_node), GFP_KERNEL); |
1252 | if (!nsim_node) |
1253 | return -ENOMEM; |
1254 | |
1255 | nsim_node->ddir = debugfs_create_dir(name: node->name, parent: nsim_dev->nodes_ddir); |
1256 | |
1257 | debugfs_create_u16(name: "tx_share" , mode: 0400, parent: nsim_node->ddir, value: &nsim_node->tx_share); |
1258 | debugfs_create_u16(name: "tx_max" , mode: 0400, parent: nsim_node->ddir, value: &nsim_node->tx_max); |
1259 | nsim_node->rate_parent = debugfs_create_file(name: "rate_parent" , mode: 0400, |
1260 | parent: nsim_node->ddir, |
1261 | data: &nsim_node->parent_name, |
1262 | fops: &nsim_dev_rate_parent_fops); |
1263 | |
1264 | *priv = nsim_node; |
1265 | return 0; |
1266 | } |
1267 | |
1268 | static int nsim_rate_node_del(struct devlink_rate *node, void *priv, |
1269 | struct netlink_ext_ack *extack) |
1270 | { |
1271 | struct nsim_rate_node *nsim_node = priv; |
1272 | |
1273 | debugfs_remove(dentry: nsim_node->rate_parent); |
1274 | debugfs_remove_recursive(dentry: nsim_node->ddir); |
1275 | kfree(objp: nsim_node); |
1276 | return 0; |
1277 | } |
1278 | |
1279 | static int nsim_rate_leaf_parent_set(struct devlink_rate *child, |
1280 | struct devlink_rate *parent, |
1281 | void *priv_child, void *priv_parent, |
1282 | struct netlink_ext_ack *extack) |
1283 | { |
1284 | struct nsim_dev_port *nsim_dev_port = priv_child; |
1285 | |
1286 | if (parent) |
1287 | nsim_dev_port->parent_name = parent->name; |
1288 | else |
1289 | nsim_dev_port->parent_name = NULL; |
1290 | return 0; |
1291 | } |
1292 | |
1293 | static int nsim_rate_node_parent_set(struct devlink_rate *child, |
1294 | struct devlink_rate *parent, |
1295 | void *priv_child, void *priv_parent, |
1296 | struct netlink_ext_ack *extack) |
1297 | { |
1298 | struct nsim_rate_node *nsim_node = priv_child; |
1299 | |
1300 | if (parent) |
1301 | nsim_node->parent_name = parent->name; |
1302 | else |
1303 | nsim_node->parent_name = NULL; |
1304 | return 0; |
1305 | } |
1306 | |
1307 | static int |
1308 | nsim_dev_devlink_trap_drop_counter_get(struct devlink *devlink, |
1309 | const struct devlink_trap *trap, |
1310 | u64 *p_drops) |
1311 | { |
1312 | struct nsim_dev *nsim_dev = devlink_priv(devlink); |
1313 | u64 *cnt; |
1314 | |
1315 | if (nsim_dev->fail_trap_drop_counter_get) |
1316 | return -EINVAL; |
1317 | |
1318 | cnt = &nsim_dev->trap_data->trap_pkt_cnt; |
1319 | *p_drops = (*cnt)++; |
1320 | |
1321 | return 0; |
1322 | } |
1323 | |
1324 | static const struct devlink_ops nsim_dev_devlink_ops = { |
1325 | .eswitch_mode_set = nsim_devlink_eswitch_mode_set, |
1326 | .eswitch_mode_get = nsim_devlink_eswitch_mode_get, |
1327 | .supported_flash_update_params = DEVLINK_SUPPORT_FLASH_UPDATE_OVERWRITE_MASK, |
1328 | .reload_actions = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT), |
1329 | .reload_down = nsim_dev_reload_down, |
1330 | .reload_up = nsim_dev_reload_up, |
1331 | .info_get = nsim_dev_info_get, |
1332 | .flash_update = nsim_dev_flash_update, |
1333 | .trap_init = nsim_dev_devlink_trap_init, |
1334 | .trap_action_set = nsim_dev_devlink_trap_action_set, |
1335 | .trap_group_set = nsim_dev_devlink_trap_group_set, |
1336 | .trap_policer_set = nsim_dev_devlink_trap_policer_set, |
1337 | .trap_policer_counter_get = nsim_dev_devlink_trap_policer_counter_get, |
1338 | .rate_leaf_tx_share_set = nsim_leaf_tx_share_set, |
1339 | .rate_leaf_tx_max_set = nsim_leaf_tx_max_set, |
1340 | .rate_node_tx_share_set = nsim_node_tx_share_set, |
1341 | .rate_node_tx_max_set = nsim_node_tx_max_set, |
1342 | .rate_node_new = nsim_rate_node_new, |
1343 | .rate_node_del = nsim_rate_node_del, |
1344 | .rate_leaf_parent_set = nsim_rate_leaf_parent_set, |
1345 | .rate_node_parent_set = nsim_rate_node_parent_set, |
1346 | .trap_drop_counter_get = nsim_dev_devlink_trap_drop_counter_get, |
1347 | }; |
1348 | |
1349 | #define NSIM_DEV_MAX_MACS_DEFAULT 32 |
1350 | #define NSIM_DEV_TEST1_DEFAULT true |
1351 | |
1352 | static int __nsim_dev_port_add(struct nsim_dev *nsim_dev, enum nsim_dev_port_type type, |
1353 | unsigned int port_index) |
1354 | { |
1355 | struct devlink_port_attrs attrs = {}; |
1356 | struct nsim_dev_port *nsim_dev_port; |
1357 | struct devlink_port *devlink_port; |
1358 | int err; |
1359 | |
1360 | if (type == NSIM_DEV_PORT_TYPE_VF && !nsim_dev_get_vfs(nsim_dev)) |
1361 | return -EINVAL; |
1362 | |
1363 | nsim_dev_port = kzalloc(size: sizeof(*nsim_dev_port), GFP_KERNEL); |
1364 | if (!nsim_dev_port) |
1365 | return -ENOMEM; |
1366 | nsim_dev_port->port_index = nsim_dev_port_index(type, port_index); |
1367 | nsim_dev_port->port_type = type; |
1368 | |
1369 | devlink_port = &nsim_dev_port->devlink_port; |
1370 | if (nsim_dev_port_is_pf(nsim_dev_port)) { |
1371 | attrs.flavour = DEVLINK_PORT_FLAVOUR_PHYSICAL; |
1372 | attrs.phys.port_number = port_index + 1; |
1373 | } else { |
1374 | attrs.flavour = DEVLINK_PORT_FLAVOUR_PCI_VF; |
1375 | attrs.pci_vf.pf = 0; |
1376 | attrs.pci_vf.vf = port_index; |
1377 | } |
1378 | memcpy(attrs.switch_id.id, nsim_dev->switch_id.id, nsim_dev->switch_id.id_len); |
1379 | attrs.switch_id.id_len = nsim_dev->switch_id.id_len; |
1380 | devlink_port_attrs_set(devlink_port, devlink_port_attrs: &attrs); |
1381 | err = devl_port_register(devlink: priv_to_devlink(priv: nsim_dev), devlink_port, |
1382 | port_index: nsim_dev_port->port_index); |
1383 | if (err) |
1384 | goto err_port_free; |
1385 | |
1386 | err = nsim_dev_port_debugfs_init(nsim_dev, nsim_dev_port); |
1387 | if (err) |
1388 | goto err_dl_port_unregister; |
1389 | |
1390 | nsim_dev_port->ns = nsim_create(nsim_dev, nsim_dev_port); |
1391 | if (IS_ERR(ptr: nsim_dev_port->ns)) { |
1392 | err = PTR_ERR(ptr: nsim_dev_port->ns); |
1393 | goto err_port_debugfs_exit; |
1394 | } |
1395 | |
1396 | if (nsim_dev_port_is_vf(nsim_dev_port)) { |
1397 | err = devl_rate_leaf_create(devlink_port: &nsim_dev_port->devlink_port, |
1398 | priv: nsim_dev_port, NULL); |
1399 | if (err) |
1400 | goto err_nsim_destroy; |
1401 | } |
1402 | |
1403 | list_add(new: &nsim_dev_port->list, head: &nsim_dev->port_list); |
1404 | |
1405 | return 0; |
1406 | |
1407 | err_nsim_destroy: |
1408 | nsim_destroy(ns: nsim_dev_port->ns); |
1409 | err_port_debugfs_exit: |
1410 | nsim_dev_port_debugfs_exit(nsim_dev_port); |
1411 | err_dl_port_unregister: |
1412 | devl_port_unregister(devlink_port); |
1413 | err_port_free: |
1414 | kfree(objp: nsim_dev_port); |
1415 | return err; |
1416 | } |
1417 | |
1418 | static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port) |
1419 | { |
1420 | struct devlink_port *devlink_port = &nsim_dev_port->devlink_port; |
1421 | |
1422 | list_del(entry: &nsim_dev_port->list); |
1423 | if (nsim_dev_port_is_vf(nsim_dev_port)) |
1424 | devl_rate_leaf_destroy(devlink_port: &nsim_dev_port->devlink_port); |
1425 | nsim_destroy(ns: nsim_dev_port->ns); |
1426 | nsim_dev_port_debugfs_exit(nsim_dev_port); |
1427 | devl_port_unregister(devlink_port); |
1428 | kfree(objp: nsim_dev_port); |
1429 | } |
1430 | |
1431 | static void nsim_dev_port_del_all(struct nsim_dev *nsim_dev) |
1432 | { |
1433 | struct nsim_dev_port *nsim_dev_port, *tmp; |
1434 | |
1435 | list_for_each_entry_safe(nsim_dev_port, tmp, |
1436 | &nsim_dev->port_list, list) |
1437 | __nsim_dev_port_del(nsim_dev_port); |
1438 | } |
1439 | |
1440 | static int nsim_dev_port_add_all(struct nsim_dev *nsim_dev, |
1441 | unsigned int port_count) |
1442 | { |
1443 | int i, err; |
1444 | |
1445 | for (i = 0; i < port_count; i++) { |
1446 | err = __nsim_dev_port_add(nsim_dev, type: NSIM_DEV_PORT_TYPE_PF, port_index: i); |
1447 | if (err) |
1448 | goto err_port_del_all; |
1449 | } |
1450 | return 0; |
1451 | |
1452 | err_port_del_all: |
1453 | nsim_dev_port_del_all(nsim_dev); |
1454 | return err; |
1455 | } |
1456 | |
1457 | static int nsim_dev_reload_create(struct nsim_dev *nsim_dev, |
1458 | struct netlink_ext_ack *extack) |
1459 | { |
1460 | struct nsim_bus_dev *nsim_bus_dev = nsim_dev->nsim_bus_dev; |
1461 | struct devlink *devlink; |
1462 | int err; |
1463 | |
1464 | devlink = priv_to_devlink(priv: nsim_dev); |
1465 | nsim_dev = devlink_priv(devlink); |
1466 | INIT_LIST_HEAD(list: &nsim_dev->port_list); |
1467 | nsim_dev->fw_update_status = true; |
1468 | nsim_dev->fw_update_overwrite_mask = 0; |
1469 | |
1470 | nsim_devlink_param_load_driverinit_values(devlink); |
1471 | |
1472 | err = nsim_dev_dummy_region_init(nsim_dev, devlink); |
1473 | if (err) |
1474 | return err; |
1475 | |
1476 | err = nsim_dev_traps_init(devlink); |
1477 | if (err) |
1478 | goto err_dummy_region_exit; |
1479 | |
1480 | nsim_dev->fib_data = nsim_fib_create(devlink, extack); |
1481 | if (IS_ERR(ptr: nsim_dev->fib_data)) { |
1482 | err = PTR_ERR(ptr: nsim_dev->fib_data); |
1483 | goto err_traps_exit; |
1484 | } |
1485 | |
1486 | err = nsim_dev_health_init(nsim_dev, devlink); |
1487 | if (err) |
1488 | goto err_fib_destroy; |
1489 | |
1490 | err = nsim_dev_psample_init(nsim_dev); |
1491 | if (err) |
1492 | goto err_health_exit; |
1493 | |
1494 | err = nsim_dev_hwstats_init(nsim_dev); |
1495 | if (err) |
1496 | goto err_psample_exit; |
1497 | |
1498 | err = nsim_dev_port_add_all(nsim_dev, port_count: nsim_bus_dev->port_count); |
1499 | if (err) |
1500 | goto err_hwstats_exit; |
1501 | |
1502 | nsim_dev->take_snapshot = debugfs_create_file(name: "take_snapshot" , |
1503 | mode: 0200, |
1504 | parent: nsim_dev->ddir, |
1505 | data: nsim_dev, |
1506 | fops: &nsim_dev_take_snapshot_fops); |
1507 | return 0; |
1508 | |
1509 | err_hwstats_exit: |
1510 | nsim_dev_hwstats_exit(nsim_dev); |
1511 | err_psample_exit: |
1512 | nsim_dev_psample_exit(nsim_dev); |
1513 | err_health_exit: |
1514 | nsim_dev_health_exit(nsim_dev); |
1515 | err_fib_destroy: |
1516 | nsim_fib_destroy(devlink, fib_data: nsim_dev->fib_data); |
1517 | err_traps_exit: |
1518 | nsim_dev_traps_exit(devlink); |
1519 | err_dummy_region_exit: |
1520 | nsim_dev_dummy_region_exit(nsim_dev); |
1521 | return err; |
1522 | } |
1523 | |
1524 | int nsim_drv_probe(struct nsim_bus_dev *nsim_bus_dev) |
1525 | { |
1526 | struct nsim_dev *nsim_dev; |
1527 | struct devlink *devlink; |
1528 | int err; |
1529 | |
1530 | devlink = devlink_alloc_ns(ops: &nsim_dev_devlink_ops, priv_size: sizeof(*nsim_dev), |
1531 | net: nsim_bus_dev->initial_net, dev: &nsim_bus_dev->dev); |
1532 | if (!devlink) |
1533 | return -ENOMEM; |
1534 | devl_lock(devlink); |
1535 | nsim_dev = devlink_priv(devlink); |
1536 | nsim_dev->nsim_bus_dev = nsim_bus_dev; |
1537 | nsim_dev->switch_id.id_len = sizeof(nsim_dev->switch_id.id); |
1538 | get_random_bytes(buf: nsim_dev->switch_id.id, len: nsim_dev->switch_id.id_len); |
1539 | INIT_LIST_HEAD(list: &nsim_dev->port_list); |
1540 | nsim_dev->fw_update_status = true; |
1541 | nsim_dev->fw_update_overwrite_mask = 0; |
1542 | nsim_dev->max_macs = NSIM_DEV_MAX_MACS_DEFAULT; |
1543 | nsim_dev->test1 = NSIM_DEV_TEST1_DEFAULT; |
1544 | spin_lock_init(&nsim_dev->fa_cookie_lock); |
1545 | |
1546 | dev_set_drvdata(dev: &nsim_bus_dev->dev, data: nsim_dev); |
1547 | |
1548 | nsim_dev->vfconfigs = kcalloc(n: nsim_bus_dev->max_vfs, |
1549 | size: sizeof(struct nsim_vf_config), |
1550 | GFP_KERNEL | __GFP_NOWARN); |
1551 | if (!nsim_dev->vfconfigs) { |
1552 | err = -ENOMEM; |
1553 | goto err_devlink_unlock; |
1554 | } |
1555 | |
1556 | err = devl_register(devlink); |
1557 | if (err) |
1558 | goto err_vfc_free; |
1559 | |
1560 | err = nsim_dev_resources_register(devlink); |
1561 | if (err) |
1562 | goto err_dl_unregister; |
1563 | |
1564 | err = devl_params_register(devlink, params: nsim_devlink_params, |
1565 | ARRAY_SIZE(nsim_devlink_params)); |
1566 | if (err) |
1567 | goto err_resource_unregister; |
1568 | nsim_devlink_set_params_init_values(nsim_dev, devlink); |
1569 | |
1570 | err = nsim_dev_dummy_region_init(nsim_dev, devlink); |
1571 | if (err) |
1572 | goto err_params_unregister; |
1573 | |
1574 | err = nsim_dev_traps_init(devlink); |
1575 | if (err) |
1576 | goto err_dummy_region_exit; |
1577 | |
1578 | err = nsim_dev_debugfs_init(nsim_dev); |
1579 | if (err) |
1580 | goto err_traps_exit; |
1581 | |
1582 | nsim_dev->fib_data = nsim_fib_create(devlink, NULL); |
1583 | if (IS_ERR(ptr: nsim_dev->fib_data)) { |
1584 | err = PTR_ERR(ptr: nsim_dev->fib_data); |
1585 | goto err_debugfs_exit; |
1586 | } |
1587 | |
1588 | err = nsim_dev_health_init(nsim_dev, devlink); |
1589 | if (err) |
1590 | goto err_fib_destroy; |
1591 | |
1592 | err = nsim_bpf_dev_init(nsim_dev); |
1593 | if (err) |
1594 | goto err_health_exit; |
1595 | |
1596 | err = nsim_dev_psample_init(nsim_dev); |
1597 | if (err) |
1598 | goto err_bpf_dev_exit; |
1599 | |
1600 | err = nsim_dev_hwstats_init(nsim_dev); |
1601 | if (err) |
1602 | goto err_psample_exit; |
1603 | |
1604 | err = nsim_dev_port_add_all(nsim_dev, port_count: nsim_bus_dev->port_count); |
1605 | if (err) |
1606 | goto err_hwstats_exit; |
1607 | |
1608 | nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_LEGACY; |
1609 | devl_unlock(devlink); |
1610 | return 0; |
1611 | |
1612 | err_hwstats_exit: |
1613 | nsim_dev_hwstats_exit(nsim_dev); |
1614 | err_psample_exit: |
1615 | nsim_dev_psample_exit(nsim_dev); |
1616 | err_bpf_dev_exit: |
1617 | nsim_bpf_dev_exit(nsim_dev); |
1618 | err_health_exit: |
1619 | nsim_dev_health_exit(nsim_dev); |
1620 | err_fib_destroy: |
1621 | nsim_fib_destroy(devlink, fib_data: nsim_dev->fib_data); |
1622 | err_debugfs_exit: |
1623 | nsim_dev_debugfs_exit(nsim_dev); |
1624 | err_traps_exit: |
1625 | nsim_dev_traps_exit(devlink); |
1626 | err_dummy_region_exit: |
1627 | nsim_dev_dummy_region_exit(nsim_dev); |
1628 | err_params_unregister: |
1629 | devl_params_unregister(devlink, params: nsim_devlink_params, |
1630 | ARRAY_SIZE(nsim_devlink_params)); |
1631 | err_resource_unregister: |
1632 | devl_resources_unregister(devlink); |
1633 | err_dl_unregister: |
1634 | devl_unregister(devlink); |
1635 | err_vfc_free: |
1636 | kfree(objp: nsim_dev->vfconfigs); |
1637 | err_devlink_unlock: |
1638 | devl_unlock(devlink); |
1639 | devlink_free(devlink); |
1640 | dev_set_drvdata(dev: &nsim_bus_dev->dev, NULL); |
1641 | return err; |
1642 | } |
1643 | |
1644 | static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev) |
1645 | { |
1646 | struct devlink *devlink = priv_to_devlink(priv: nsim_dev); |
1647 | |
1648 | if (devlink_is_reload_failed(devlink)) |
1649 | return; |
1650 | debugfs_remove(dentry: nsim_dev->take_snapshot); |
1651 | |
1652 | if (nsim_dev_get_vfs(nsim_dev)) { |
1653 | nsim_bus_dev_set_vfs(nsim_bus_dev: nsim_dev->nsim_bus_dev, num_vfs: 0); |
1654 | if (nsim_esw_mode_is_switchdev(nsim_dev)) |
1655 | nsim_esw_legacy_enable(nsim_dev, NULL); |
1656 | } |
1657 | |
1658 | nsim_dev_port_del_all(nsim_dev); |
1659 | nsim_dev_hwstats_exit(nsim_dev); |
1660 | nsim_dev_psample_exit(nsim_dev); |
1661 | nsim_dev_health_exit(nsim_dev); |
1662 | nsim_fib_destroy(devlink, fib_data: nsim_dev->fib_data); |
1663 | nsim_dev_traps_exit(devlink); |
1664 | nsim_dev_dummy_region_exit(nsim_dev); |
1665 | } |
1666 | |
1667 | void nsim_drv_remove(struct nsim_bus_dev *nsim_bus_dev) |
1668 | { |
1669 | struct nsim_dev *nsim_dev = dev_get_drvdata(dev: &nsim_bus_dev->dev); |
1670 | struct devlink *devlink = priv_to_devlink(priv: nsim_dev); |
1671 | |
1672 | devl_lock(devlink); |
1673 | nsim_dev_reload_destroy(nsim_dev); |
1674 | |
1675 | nsim_bpf_dev_exit(nsim_dev); |
1676 | nsim_dev_debugfs_exit(nsim_dev); |
1677 | devl_params_unregister(devlink, params: nsim_devlink_params, |
1678 | ARRAY_SIZE(nsim_devlink_params)); |
1679 | devl_resources_unregister(devlink); |
1680 | devl_unregister(devlink); |
1681 | kfree(objp: nsim_dev->vfconfigs); |
1682 | kfree(objp: nsim_dev->fa_cookie); |
1683 | devl_unlock(devlink); |
1684 | devlink_free(devlink); |
1685 | dev_set_drvdata(dev: &nsim_bus_dev->dev, NULL); |
1686 | } |
1687 | |
1688 | static struct nsim_dev_port * |
1689 | __nsim_dev_port_lookup(struct nsim_dev *nsim_dev, enum nsim_dev_port_type type, |
1690 | unsigned int port_index) |
1691 | { |
1692 | struct nsim_dev_port *nsim_dev_port; |
1693 | |
1694 | port_index = nsim_dev_port_index(type, port_index); |
1695 | list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list) |
1696 | if (nsim_dev_port->port_index == port_index) |
1697 | return nsim_dev_port; |
1698 | return NULL; |
1699 | } |
1700 | |
1701 | int nsim_drv_port_add(struct nsim_bus_dev *nsim_bus_dev, enum nsim_dev_port_type type, |
1702 | unsigned int port_index) |
1703 | { |
1704 | struct nsim_dev *nsim_dev = dev_get_drvdata(dev: &nsim_bus_dev->dev); |
1705 | int err; |
1706 | |
1707 | devl_lock(devlink: priv_to_devlink(priv: nsim_dev)); |
1708 | if (__nsim_dev_port_lookup(nsim_dev, type, port_index)) |
1709 | err = -EEXIST; |
1710 | else |
1711 | err = __nsim_dev_port_add(nsim_dev, type, port_index); |
1712 | devl_unlock(devlink: priv_to_devlink(priv: nsim_dev)); |
1713 | return err; |
1714 | } |
1715 | |
1716 | int nsim_drv_port_del(struct nsim_bus_dev *nsim_bus_dev, enum nsim_dev_port_type type, |
1717 | unsigned int port_index) |
1718 | { |
1719 | struct nsim_dev *nsim_dev = dev_get_drvdata(dev: &nsim_bus_dev->dev); |
1720 | struct nsim_dev_port *nsim_dev_port; |
1721 | int err = 0; |
1722 | |
1723 | devl_lock(devlink: priv_to_devlink(priv: nsim_dev)); |
1724 | nsim_dev_port = __nsim_dev_port_lookup(nsim_dev, type, port_index); |
1725 | if (!nsim_dev_port) |
1726 | err = -ENOENT; |
1727 | else |
1728 | __nsim_dev_port_del(nsim_dev_port); |
1729 | devl_unlock(devlink: priv_to_devlink(priv: nsim_dev)); |
1730 | return err; |
1731 | } |
1732 | |
1733 | int nsim_drv_configure_vfs(struct nsim_bus_dev *nsim_bus_dev, |
1734 | unsigned int num_vfs) |
1735 | { |
1736 | struct nsim_dev *nsim_dev = dev_get_drvdata(dev: &nsim_bus_dev->dev); |
1737 | struct devlink *devlink = priv_to_devlink(priv: nsim_dev); |
1738 | int ret = 0; |
1739 | |
1740 | devl_lock(devlink); |
1741 | if (nsim_bus_dev->num_vfs == num_vfs) |
1742 | goto exit_unlock; |
1743 | if (nsim_bus_dev->num_vfs && num_vfs) { |
1744 | ret = -EBUSY; |
1745 | goto exit_unlock; |
1746 | } |
1747 | if (nsim_bus_dev->max_vfs < num_vfs) { |
1748 | ret = -ENOMEM; |
1749 | goto exit_unlock; |
1750 | } |
1751 | |
1752 | nsim_bus_dev_set_vfs(nsim_bus_dev, num_vfs); |
1753 | if (nsim_esw_mode_is_switchdev(nsim_dev)) { |
1754 | if (num_vfs) { |
1755 | ret = nsim_esw_switchdev_enable(nsim_dev, NULL); |
1756 | if (ret) { |
1757 | nsim_bus_dev_set_vfs(nsim_bus_dev, num_vfs: 0); |
1758 | goto exit_unlock; |
1759 | } |
1760 | } else { |
1761 | nsim_esw_legacy_enable(nsim_dev, NULL); |
1762 | } |
1763 | } |
1764 | |
1765 | exit_unlock: |
1766 | devl_unlock(devlink); |
1767 | |
1768 | return ret; |
1769 | } |
1770 | |
1771 | int nsim_dev_init(void) |
1772 | { |
1773 | nsim_dev_ddir = debugfs_create_dir(DRV_NAME, NULL); |
1774 | return PTR_ERR_OR_ZERO(ptr: nsim_dev_ddir); |
1775 | } |
1776 | |
1777 | void nsim_dev_exit(void) |
1778 | { |
1779 | debugfs_remove_recursive(dentry: nsim_dev_ddir); |
1780 | } |
1781 | |