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 struct dentry *nsim_dev_ddir; 39 40 #define NSIM_DEV_DUMMY_REGION_SIZE (1024 * 32) 41 42 static int 43 nsim_dev_take_snapshot(struct devlink *devlink, 44 const struct devlink_region_ops *ops, 45 struct netlink_ext_ack *extack, 46 u8 **data) 47 { 48 void *dummy_data; 49 50 dummy_data = kmalloc(NSIM_DEV_DUMMY_REGION_SIZE, GFP_KERNEL); 51 if (!dummy_data) 52 return -ENOMEM; 53 54 get_random_bytes(dummy_data, NSIM_DEV_DUMMY_REGION_SIZE); 55 56 *data = dummy_data; 57 58 return 0; 59 } 60 61 static ssize_t nsim_dev_take_snapshot_write(struct file *file, 62 const char __user *data, 63 size_t count, loff_t *ppos) 64 { 65 struct nsim_dev *nsim_dev = file->private_data; 66 struct devlink *devlink; 67 u8 *dummy_data; 68 int err; 69 u32 id; 70 71 devlink = priv_to_devlink(nsim_dev); 72 73 err = nsim_dev_take_snapshot(devlink, NULL, NULL, &dummy_data); 74 if (err) 75 return err; 76 77 err = devlink_region_snapshot_id_get(devlink, &id); 78 if (err) { 79 pr_err("Failed to get snapshot id\n"); 80 kfree(dummy_data); 81 return err; 82 } 83 err = devlink_region_snapshot_create(nsim_dev->dummy_region, 84 dummy_data, id); 85 devlink_region_snapshot_id_put(devlink, id); 86 if (err) { 87 pr_err("Failed to create region snapshot\n"); 88 kfree(dummy_data); 89 return err; 90 } 91 92 return count; 93 } 94 95 static const struct file_operations nsim_dev_take_snapshot_fops = { 96 .open = simple_open, 97 .write = nsim_dev_take_snapshot_write, 98 .llseek = generic_file_llseek, 99 .owner = THIS_MODULE, 100 }; 101 102 static ssize_t nsim_dev_trap_fa_cookie_read(struct file *file, 103 char __user *data, 104 size_t count, loff_t *ppos) 105 { 106 struct nsim_dev *nsim_dev = file->private_data; 107 struct flow_action_cookie *fa_cookie; 108 unsigned int buf_len; 109 ssize_t ret; 110 char *buf; 111 112 spin_lock(&nsim_dev->fa_cookie_lock); 113 fa_cookie = nsim_dev->fa_cookie; 114 if (!fa_cookie) { 115 ret = -EINVAL; 116 goto errout; 117 } 118 buf_len = fa_cookie->cookie_len * 2; 119 buf = kmalloc(buf_len, GFP_ATOMIC); 120 if (!buf) { 121 ret = -ENOMEM; 122 goto errout; 123 } 124 bin2hex(buf, fa_cookie->cookie, fa_cookie->cookie_len); 125 spin_unlock(&nsim_dev->fa_cookie_lock); 126 127 ret = simple_read_from_buffer(data, count, ppos, buf, buf_len); 128 129 kfree(buf); 130 return ret; 131 132 errout: 133 spin_unlock(&nsim_dev->fa_cookie_lock); 134 return ret; 135 } 136 137 static ssize_t nsim_dev_trap_fa_cookie_write(struct file *file, 138 const 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 size_t cookie_len; 144 ssize_t ret; 145 char *buf; 146 147 if (*ppos != 0) 148 return -EINVAL; 149 cookie_len = (count - 1) / 2; 150 if ((count - 1) % 2) 151 return -EINVAL; 152 buf = kmalloc(count, GFP_KERNEL | __GFP_NOWARN); 153 if (!buf) 154 return -ENOMEM; 155 156 ret = simple_write_to_buffer(buf, count, ppos, data, count); 157 if (ret < 0) 158 goto free_buf; 159 160 fa_cookie = kmalloc(sizeof(*fa_cookie) + cookie_len, 161 GFP_KERNEL | __GFP_NOWARN); 162 if (!fa_cookie) { 163 ret = -ENOMEM; 164 goto free_buf; 165 } 166 167 fa_cookie->cookie_len = cookie_len; 168 ret = hex2bin(fa_cookie->cookie, buf, cookie_len); 169 if (ret) 170 goto free_fa_cookie; 171 kfree(buf); 172 173 spin_lock(&nsim_dev->fa_cookie_lock); 174 kfree(nsim_dev->fa_cookie); 175 nsim_dev->fa_cookie = fa_cookie; 176 spin_unlock(&nsim_dev->fa_cookie_lock); 177 178 return count; 179 180 free_fa_cookie: 181 kfree(fa_cookie); 182 free_buf: 183 kfree(buf); 184 return ret; 185 } 186 187 static const struct file_operations nsim_dev_trap_fa_cookie_fops = { 188 .open = simple_open, 189 .read = nsim_dev_trap_fa_cookie_read, 190 .write = nsim_dev_trap_fa_cookie_write, 191 .llseek = generic_file_llseek, 192 .owner = THIS_MODULE, 193 }; 194 195 static int nsim_dev_debugfs_init(struct nsim_dev *nsim_dev) 196 { 197 char dev_ddir_name[sizeof(DRV_NAME) + 10]; 198 199 sprintf(dev_ddir_name, DRV_NAME "%u", nsim_dev->nsim_bus_dev->dev.id); 200 nsim_dev->ddir = debugfs_create_dir(dev_ddir_name, nsim_dev_ddir); 201 if (IS_ERR(nsim_dev->ddir)) 202 return PTR_ERR(nsim_dev->ddir); 203 nsim_dev->ports_ddir = debugfs_create_dir("ports", nsim_dev->ddir); 204 if (IS_ERR(nsim_dev->ports_ddir)) 205 return PTR_ERR(nsim_dev->ports_ddir); 206 debugfs_create_bool("fw_update_status", 0600, nsim_dev->ddir, 207 &nsim_dev->fw_update_status); 208 debugfs_create_u32("fw_update_overwrite_mask", 0600, nsim_dev->ddir, 209 &nsim_dev->fw_update_overwrite_mask); 210 debugfs_create_u32("max_macs", 0600, nsim_dev->ddir, 211 &nsim_dev->max_macs); 212 debugfs_create_bool("test1", 0600, nsim_dev->ddir, 213 &nsim_dev->test1); 214 nsim_dev->take_snapshot = debugfs_create_file("take_snapshot", 215 0200, 216 nsim_dev->ddir, 217 nsim_dev, 218 &nsim_dev_take_snapshot_fops); 219 debugfs_create_bool("dont_allow_reload", 0600, nsim_dev->ddir, 220 &nsim_dev->dont_allow_reload); 221 debugfs_create_bool("fail_reload", 0600, nsim_dev->ddir, 222 &nsim_dev->fail_reload); 223 debugfs_create_file("trap_flow_action_cookie", 0600, nsim_dev->ddir, 224 nsim_dev, &nsim_dev_trap_fa_cookie_fops); 225 debugfs_create_bool("fail_trap_group_set", 0600, 226 nsim_dev->ddir, 227 &nsim_dev->fail_trap_group_set); 228 debugfs_create_bool("fail_trap_policer_set", 0600, 229 nsim_dev->ddir, 230 &nsim_dev->fail_trap_policer_set); 231 debugfs_create_bool("fail_trap_policer_counter_get", 0600, 232 nsim_dev->ddir, 233 &nsim_dev->fail_trap_policer_counter_get); 234 nsim_udp_tunnels_debugfs_create(nsim_dev); 235 return 0; 236 } 237 238 static void nsim_dev_debugfs_exit(struct nsim_dev *nsim_dev) 239 { 240 debugfs_remove_recursive(nsim_dev->ports_ddir); 241 debugfs_remove_recursive(nsim_dev->ddir); 242 } 243 244 static int nsim_dev_port_debugfs_init(struct nsim_dev *nsim_dev, 245 struct nsim_dev_port *nsim_dev_port) 246 { 247 char port_ddir_name[16]; 248 char dev_link_name[32]; 249 250 sprintf(port_ddir_name, "%u", nsim_dev_port->port_index); 251 nsim_dev_port->ddir = debugfs_create_dir(port_ddir_name, 252 nsim_dev->ports_ddir); 253 if (IS_ERR(nsim_dev_port->ddir)) 254 return PTR_ERR(nsim_dev_port->ddir); 255 256 sprintf(dev_link_name, "../../../" DRV_NAME "%u", 257 nsim_dev->nsim_bus_dev->dev.id); 258 debugfs_create_symlink("dev", nsim_dev_port->ddir, dev_link_name); 259 260 return 0; 261 } 262 263 static void nsim_dev_port_debugfs_exit(struct nsim_dev_port *nsim_dev_port) 264 { 265 debugfs_remove_recursive(nsim_dev_port->ddir); 266 } 267 268 static int nsim_dev_resources_register(struct devlink *devlink) 269 { 270 struct devlink_resource_size_params params = { 271 .size_max = (u64)-1, 272 .size_granularity = 1, 273 .unit = DEVLINK_RESOURCE_UNIT_ENTRY 274 }; 275 int err; 276 277 /* Resources for IPv4 */ 278 err = devlink_resource_register(devlink, "IPv4", (u64)-1, 279 NSIM_RESOURCE_IPV4, 280 DEVLINK_RESOURCE_ID_PARENT_TOP, 281 ¶ms); 282 if (err) { 283 pr_err("Failed to register IPv4 top resource\n"); 284 goto out; 285 } 286 287 err = devlink_resource_register(devlink, "fib", (u64)-1, 288 NSIM_RESOURCE_IPV4_FIB, 289 NSIM_RESOURCE_IPV4, ¶ms); 290 if (err) { 291 pr_err("Failed to register IPv4 FIB resource\n"); 292 return err; 293 } 294 295 err = devlink_resource_register(devlink, "fib-rules", (u64)-1, 296 NSIM_RESOURCE_IPV4_FIB_RULES, 297 NSIM_RESOURCE_IPV4, ¶ms); 298 if (err) { 299 pr_err("Failed to register IPv4 FIB rules resource\n"); 300 return err; 301 } 302 303 /* Resources for IPv6 */ 304 err = devlink_resource_register(devlink, "IPv6", (u64)-1, 305 NSIM_RESOURCE_IPV6, 306 DEVLINK_RESOURCE_ID_PARENT_TOP, 307 ¶ms); 308 if (err) { 309 pr_err("Failed to register IPv6 top resource\n"); 310 goto out; 311 } 312 313 err = devlink_resource_register(devlink, "fib", (u64)-1, 314 NSIM_RESOURCE_IPV6_FIB, 315 NSIM_RESOURCE_IPV6, ¶ms); 316 if (err) { 317 pr_err("Failed to register IPv6 FIB resource\n"); 318 return err; 319 } 320 321 err = devlink_resource_register(devlink, "fib-rules", (u64)-1, 322 NSIM_RESOURCE_IPV6_FIB_RULES, 323 NSIM_RESOURCE_IPV6, ¶ms); 324 if (err) { 325 pr_err("Failed to register IPv6 FIB rules resource\n"); 326 return err; 327 } 328 329 out: 330 return err; 331 } 332 333 enum nsim_devlink_param_id { 334 NSIM_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX, 335 NSIM_DEVLINK_PARAM_ID_TEST1, 336 }; 337 338 static const struct devlink_param nsim_devlink_params[] = { 339 DEVLINK_PARAM_GENERIC(MAX_MACS, 340 BIT(DEVLINK_PARAM_CMODE_DRIVERINIT), 341 NULL, NULL, NULL), 342 DEVLINK_PARAM_DRIVER(NSIM_DEVLINK_PARAM_ID_TEST1, 343 "test1", DEVLINK_PARAM_TYPE_BOOL, 344 BIT(DEVLINK_PARAM_CMODE_DRIVERINIT), 345 NULL, NULL, NULL), 346 }; 347 348 static void nsim_devlink_set_params_init_values(struct nsim_dev *nsim_dev, 349 struct devlink *devlink) 350 { 351 union devlink_param_value value; 352 353 value.vu32 = nsim_dev->max_macs; 354 devlink_param_driverinit_value_set(devlink, 355 DEVLINK_PARAM_GENERIC_ID_MAX_MACS, 356 value); 357 value.vbool = nsim_dev->test1; 358 devlink_param_driverinit_value_set(devlink, 359 NSIM_DEVLINK_PARAM_ID_TEST1, 360 value); 361 } 362 363 static void nsim_devlink_param_load_driverinit_values(struct devlink *devlink) 364 { 365 struct nsim_dev *nsim_dev = devlink_priv(devlink); 366 union devlink_param_value saved_value; 367 int err; 368 369 err = devlink_param_driverinit_value_get(devlink, 370 DEVLINK_PARAM_GENERIC_ID_MAX_MACS, 371 &saved_value); 372 if (!err) 373 nsim_dev->max_macs = saved_value.vu32; 374 err = devlink_param_driverinit_value_get(devlink, 375 NSIM_DEVLINK_PARAM_ID_TEST1, 376 &saved_value); 377 if (!err) 378 nsim_dev->test1 = saved_value.vbool; 379 } 380 381 #define NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX 16 382 383 static const struct devlink_region_ops dummy_region_ops = { 384 .name = "dummy", 385 .destructor = &kfree, 386 .snapshot = nsim_dev_take_snapshot, 387 }; 388 389 static int nsim_dev_dummy_region_init(struct nsim_dev *nsim_dev, 390 struct devlink *devlink) 391 { 392 nsim_dev->dummy_region = 393 devlink_region_create(devlink, &dummy_region_ops, 394 NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX, 395 NSIM_DEV_DUMMY_REGION_SIZE); 396 return PTR_ERR_OR_ZERO(nsim_dev->dummy_region); 397 } 398 399 static void nsim_dev_dummy_region_exit(struct nsim_dev *nsim_dev) 400 { 401 devlink_region_destroy(nsim_dev->dummy_region); 402 } 403 404 struct nsim_trap_item { 405 void *trap_ctx; 406 enum devlink_trap_action action; 407 }; 408 409 struct nsim_trap_data { 410 struct delayed_work trap_report_dw; 411 struct nsim_trap_item *trap_items_arr; 412 u64 *trap_policers_cnt_arr; 413 struct nsim_dev *nsim_dev; 414 spinlock_t trap_lock; /* Protects trap_items_arr */ 415 }; 416 417 /* All driver-specific traps must be documented in 418 * Documentation/networking/devlink/netdevsim.rst 419 */ 420 enum { 421 NSIM_TRAP_ID_BASE = DEVLINK_TRAP_GENERIC_ID_MAX, 422 NSIM_TRAP_ID_FID_MISS, 423 }; 424 425 #define NSIM_TRAP_NAME_FID_MISS "fid_miss" 426 427 #define NSIM_TRAP_METADATA DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT 428 429 #define NSIM_TRAP_DROP(_id, _group_id) \ 430 DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \ 431 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ 432 NSIM_TRAP_METADATA) 433 #define NSIM_TRAP_DROP_EXT(_id, _group_id, _metadata) \ 434 DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \ 435 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ 436 NSIM_TRAP_METADATA | (_metadata)) 437 #define NSIM_TRAP_EXCEPTION(_id, _group_id) \ 438 DEVLINK_TRAP_GENERIC(EXCEPTION, TRAP, _id, \ 439 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ 440 NSIM_TRAP_METADATA) 441 #define NSIM_TRAP_CONTROL(_id, _group_id, _action) \ 442 DEVLINK_TRAP_GENERIC(CONTROL, _action, _id, \ 443 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ 444 NSIM_TRAP_METADATA) 445 #define NSIM_TRAP_DRIVER_EXCEPTION(_id, _group_id) \ 446 DEVLINK_TRAP_DRIVER(EXCEPTION, TRAP, NSIM_TRAP_ID_##_id, \ 447 NSIM_TRAP_NAME_##_id, \ 448 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ 449 NSIM_TRAP_METADATA) 450 451 #define NSIM_DEV_TRAP_POLICER_MIN_RATE 1 452 #define NSIM_DEV_TRAP_POLICER_MAX_RATE 8000 453 #define NSIM_DEV_TRAP_POLICER_MIN_BURST 8 454 #define NSIM_DEV_TRAP_POLICER_MAX_BURST 65536 455 456 #define NSIM_TRAP_POLICER(_id, _rate, _burst) \ 457 DEVLINK_TRAP_POLICER(_id, _rate, _burst, \ 458 NSIM_DEV_TRAP_POLICER_MAX_RATE, \ 459 NSIM_DEV_TRAP_POLICER_MIN_RATE, \ 460 NSIM_DEV_TRAP_POLICER_MAX_BURST, \ 461 NSIM_DEV_TRAP_POLICER_MIN_BURST) 462 463 static const struct devlink_trap_policer nsim_trap_policers_arr[] = { 464 NSIM_TRAP_POLICER(1, 1000, 128), 465 NSIM_TRAP_POLICER(2, 2000, 256), 466 NSIM_TRAP_POLICER(3, 3000, 512), 467 }; 468 469 static const struct devlink_trap_group nsim_trap_groups_arr[] = { 470 DEVLINK_TRAP_GROUP_GENERIC(L2_DROPS, 0), 471 DEVLINK_TRAP_GROUP_GENERIC(L3_DROPS, 1), 472 DEVLINK_TRAP_GROUP_GENERIC(L3_EXCEPTIONS, 1), 473 DEVLINK_TRAP_GROUP_GENERIC(BUFFER_DROPS, 2), 474 DEVLINK_TRAP_GROUP_GENERIC(ACL_DROPS, 3), 475 DEVLINK_TRAP_GROUP_GENERIC(MC_SNOOPING, 3), 476 }; 477 478 static const struct devlink_trap nsim_traps_arr[] = { 479 NSIM_TRAP_DROP(SMAC_MC, L2_DROPS), 480 NSIM_TRAP_DROP(VLAN_TAG_MISMATCH, L2_DROPS), 481 NSIM_TRAP_DROP(INGRESS_VLAN_FILTER, L2_DROPS), 482 NSIM_TRAP_DROP(INGRESS_STP_FILTER, L2_DROPS), 483 NSIM_TRAP_DROP(EMPTY_TX_LIST, L2_DROPS), 484 NSIM_TRAP_DROP(PORT_LOOPBACK_FILTER, L2_DROPS), 485 NSIM_TRAP_DRIVER_EXCEPTION(FID_MISS, L2_DROPS), 486 NSIM_TRAP_DROP(BLACKHOLE_ROUTE, L3_DROPS), 487 NSIM_TRAP_EXCEPTION(TTL_ERROR, L3_EXCEPTIONS), 488 NSIM_TRAP_DROP(TAIL_DROP, BUFFER_DROPS), 489 NSIM_TRAP_DROP_EXT(INGRESS_FLOW_ACTION_DROP, ACL_DROPS, 490 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE), 491 NSIM_TRAP_DROP_EXT(EGRESS_FLOW_ACTION_DROP, ACL_DROPS, 492 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE), 493 NSIM_TRAP_CONTROL(IGMP_QUERY, MC_SNOOPING, MIRROR), 494 NSIM_TRAP_CONTROL(IGMP_V1_REPORT, MC_SNOOPING, TRAP), 495 }; 496 497 #define NSIM_TRAP_L4_DATA_LEN 100 498 499 static struct sk_buff *nsim_dev_trap_skb_build(void) 500 { 501 int tot_len, data_len = NSIM_TRAP_L4_DATA_LEN; 502 struct sk_buff *skb; 503 struct udphdr *udph; 504 struct ethhdr *eth; 505 struct iphdr *iph; 506 507 skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); 508 if (!skb) 509 return NULL; 510 tot_len = sizeof(struct iphdr) + sizeof(struct udphdr) + data_len; 511 512 skb_reset_mac_header(skb); 513 eth = skb_put(skb, sizeof(struct ethhdr)); 514 eth_random_addr(eth->h_dest); 515 eth_random_addr(eth->h_source); 516 eth->h_proto = htons(ETH_P_IP); 517 skb->protocol = htons(ETH_P_IP); 518 519 skb_set_network_header(skb, skb->len); 520 iph = skb_put(skb, sizeof(struct iphdr)); 521 iph->protocol = IPPROTO_UDP; 522 iph->saddr = in_aton("192.0.2.1"); 523 iph->daddr = in_aton("198.51.100.1"); 524 iph->version = 0x4; 525 iph->frag_off = 0; 526 iph->ihl = 0x5; 527 iph->tot_len = htons(tot_len); 528 iph->ttl = 100; 529 iph->check = 0; 530 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl); 531 532 skb_set_transport_header(skb, skb->len); 533 udph = skb_put_zero(skb, sizeof(struct udphdr) + data_len); 534 get_random_bytes(&udph->source, sizeof(u16)); 535 get_random_bytes(&udph->dest, sizeof(u16)); 536 udph->len = htons(sizeof(struct udphdr) + data_len); 537 538 return skb; 539 } 540 541 static void nsim_dev_trap_report(struct nsim_dev_port *nsim_dev_port) 542 { 543 struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev; 544 struct devlink *devlink = priv_to_devlink(nsim_dev); 545 struct nsim_trap_data *nsim_trap_data; 546 int i; 547 548 nsim_trap_data = nsim_dev->trap_data; 549 550 spin_lock(&nsim_trap_data->trap_lock); 551 for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) { 552 struct flow_action_cookie *fa_cookie = NULL; 553 struct nsim_trap_item *nsim_trap_item; 554 struct sk_buff *skb; 555 bool has_fa_cookie; 556 557 has_fa_cookie = nsim_traps_arr[i].metadata_cap & 558 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE; 559 560 nsim_trap_item = &nsim_trap_data->trap_items_arr[i]; 561 if (nsim_trap_item->action == DEVLINK_TRAP_ACTION_DROP) 562 continue; 563 564 skb = nsim_dev_trap_skb_build(); 565 if (!skb) 566 continue; 567 skb->dev = nsim_dev_port->ns->netdev; 568 569 /* Trapped packets are usually passed to devlink in softIRQ, 570 * but in this case they are generated in a workqueue. Disable 571 * softIRQs to prevent lockdep from complaining about 572 * "incosistent lock state". 573 */ 574 575 spin_lock_bh(&nsim_dev->fa_cookie_lock); 576 fa_cookie = has_fa_cookie ? nsim_dev->fa_cookie : NULL; 577 devlink_trap_report(devlink, skb, nsim_trap_item->trap_ctx, 578 &nsim_dev_port->devlink_port, fa_cookie); 579 spin_unlock_bh(&nsim_dev->fa_cookie_lock); 580 consume_skb(skb); 581 } 582 spin_unlock(&nsim_trap_data->trap_lock); 583 } 584 585 #define NSIM_TRAP_REPORT_INTERVAL_MS 100 586 587 static void nsim_dev_trap_report_work(struct work_struct *work) 588 { 589 struct nsim_trap_data *nsim_trap_data; 590 struct nsim_dev_port *nsim_dev_port; 591 struct nsim_dev *nsim_dev; 592 593 nsim_trap_data = container_of(work, struct nsim_trap_data, 594 trap_report_dw.work); 595 nsim_dev = nsim_trap_data->nsim_dev; 596 597 /* For each running port and enabled packet trap, generate a UDP 598 * packet with a random 5-tuple and report it. 599 */ 600 mutex_lock(&nsim_dev->port_list_lock); 601 list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list) { 602 if (!netif_running(nsim_dev_port->ns->netdev)) 603 continue; 604 605 nsim_dev_trap_report(nsim_dev_port); 606 } 607 mutex_unlock(&nsim_dev->port_list_lock); 608 609 schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw, 610 msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS)); 611 } 612 613 static int nsim_dev_traps_init(struct devlink *devlink) 614 { 615 size_t policers_count = ARRAY_SIZE(nsim_trap_policers_arr); 616 struct nsim_dev *nsim_dev = devlink_priv(devlink); 617 struct nsim_trap_data *nsim_trap_data; 618 int err; 619 620 nsim_trap_data = kzalloc(sizeof(*nsim_trap_data), GFP_KERNEL); 621 if (!nsim_trap_data) 622 return -ENOMEM; 623 624 nsim_trap_data->trap_items_arr = kcalloc(ARRAY_SIZE(nsim_traps_arr), 625 sizeof(struct nsim_trap_item), 626 GFP_KERNEL); 627 if (!nsim_trap_data->trap_items_arr) { 628 err = -ENOMEM; 629 goto err_trap_data_free; 630 } 631 632 nsim_trap_data->trap_policers_cnt_arr = kcalloc(policers_count, 633 sizeof(u64), 634 GFP_KERNEL); 635 if (!nsim_trap_data->trap_policers_cnt_arr) { 636 err = -ENOMEM; 637 goto err_trap_items_free; 638 } 639 640 /* The lock is used to protect the action state of the registered 641 * traps. The value is written by user and read in delayed work when 642 * iterating over all the traps. 643 */ 644 spin_lock_init(&nsim_trap_data->trap_lock); 645 nsim_trap_data->nsim_dev = nsim_dev; 646 nsim_dev->trap_data = nsim_trap_data; 647 648 err = devlink_trap_policers_register(devlink, nsim_trap_policers_arr, 649 policers_count); 650 if (err) 651 goto err_trap_policers_cnt_free; 652 653 err = devlink_trap_groups_register(devlink, nsim_trap_groups_arr, 654 ARRAY_SIZE(nsim_trap_groups_arr)); 655 if (err) 656 goto err_trap_policers_unregister; 657 658 err = devlink_traps_register(devlink, nsim_traps_arr, 659 ARRAY_SIZE(nsim_traps_arr), NULL); 660 if (err) 661 goto err_trap_groups_unregister; 662 663 INIT_DELAYED_WORK(&nsim_dev->trap_data->trap_report_dw, 664 nsim_dev_trap_report_work); 665 schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw, 666 msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS)); 667 668 return 0; 669 670 err_trap_groups_unregister: 671 devlink_trap_groups_unregister(devlink, nsim_trap_groups_arr, 672 ARRAY_SIZE(nsim_trap_groups_arr)); 673 err_trap_policers_unregister: 674 devlink_trap_policers_unregister(devlink, nsim_trap_policers_arr, 675 ARRAY_SIZE(nsim_trap_policers_arr)); 676 err_trap_policers_cnt_free: 677 kfree(nsim_trap_data->trap_policers_cnt_arr); 678 err_trap_items_free: 679 kfree(nsim_trap_data->trap_items_arr); 680 err_trap_data_free: 681 kfree(nsim_trap_data); 682 return err; 683 } 684 685 static void nsim_dev_traps_exit(struct devlink *devlink) 686 { 687 struct nsim_dev *nsim_dev = devlink_priv(devlink); 688 689 cancel_delayed_work_sync(&nsim_dev->trap_data->trap_report_dw); 690 devlink_traps_unregister(devlink, nsim_traps_arr, 691 ARRAY_SIZE(nsim_traps_arr)); 692 devlink_trap_groups_unregister(devlink, nsim_trap_groups_arr, 693 ARRAY_SIZE(nsim_trap_groups_arr)); 694 devlink_trap_policers_unregister(devlink, nsim_trap_policers_arr, 695 ARRAY_SIZE(nsim_trap_policers_arr)); 696 kfree(nsim_dev->trap_data->trap_policers_cnt_arr); 697 kfree(nsim_dev->trap_data->trap_items_arr); 698 kfree(nsim_dev->trap_data); 699 } 700 701 static int nsim_dev_reload_create(struct nsim_dev *nsim_dev, 702 struct netlink_ext_ack *extack); 703 static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev); 704 705 static int nsim_dev_reload_down(struct devlink *devlink, bool netns_change, 706 enum devlink_reload_action action, enum devlink_reload_limit limit, 707 struct netlink_ext_ack *extack) 708 { 709 struct nsim_dev *nsim_dev = devlink_priv(devlink); 710 711 if (nsim_dev->dont_allow_reload) { 712 /* For testing purposes, user set debugfs dont_allow_reload 713 * value to true. So forbid it. 714 */ 715 NL_SET_ERR_MSG_MOD(extack, "User forbid the reload for testing purposes"); 716 return -EOPNOTSUPP; 717 } 718 719 nsim_dev_reload_destroy(nsim_dev); 720 return 0; 721 } 722 723 static int nsim_dev_reload_up(struct devlink *devlink, enum devlink_reload_action action, 724 enum devlink_reload_limit limit, u32 *actions_performed, 725 struct netlink_ext_ack *extack) 726 { 727 struct nsim_dev *nsim_dev = devlink_priv(devlink); 728 729 if (nsim_dev->fail_reload) { 730 /* For testing purposes, user set debugfs fail_reload 731 * value to true. Fail right away. 732 */ 733 NL_SET_ERR_MSG_MOD(extack, "User setup the reload to fail for testing purposes"); 734 return -EINVAL; 735 } 736 737 *actions_performed = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT); 738 return nsim_dev_reload_create(nsim_dev, extack); 739 } 740 741 static int nsim_dev_info_get(struct devlink *devlink, 742 struct devlink_info_req *req, 743 struct netlink_ext_ack *extack) 744 { 745 return devlink_info_driver_name_put(req, DRV_NAME); 746 } 747 748 #define NSIM_DEV_FLASH_SIZE 500000 749 #define NSIM_DEV_FLASH_CHUNK_SIZE 1000 750 #define NSIM_DEV_FLASH_CHUNK_TIME_MS 10 751 752 static int nsim_dev_flash_update(struct devlink *devlink, 753 struct devlink_flash_update_params *params, 754 struct netlink_ext_ack *extack) 755 { 756 struct nsim_dev *nsim_dev = devlink_priv(devlink); 757 int i; 758 759 if ((params->overwrite_mask & ~nsim_dev->fw_update_overwrite_mask) != 0) 760 return -EOPNOTSUPP; 761 762 if (nsim_dev->fw_update_status) { 763 devlink_flash_update_begin_notify(devlink); 764 devlink_flash_update_status_notify(devlink, 765 "Preparing to flash", 766 params->component, 0, 0); 767 } 768 769 for (i = 0; i < NSIM_DEV_FLASH_SIZE / NSIM_DEV_FLASH_CHUNK_SIZE; i++) { 770 if (nsim_dev->fw_update_status) 771 devlink_flash_update_status_notify(devlink, "Flashing", 772 params->component, 773 i * NSIM_DEV_FLASH_CHUNK_SIZE, 774 NSIM_DEV_FLASH_SIZE); 775 msleep(NSIM_DEV_FLASH_CHUNK_TIME_MS); 776 } 777 778 if (nsim_dev->fw_update_status) { 779 devlink_flash_update_status_notify(devlink, "Flashing", 780 params->component, 781 NSIM_DEV_FLASH_SIZE, 782 NSIM_DEV_FLASH_SIZE); 783 devlink_flash_update_timeout_notify(devlink, "Flash select", 784 params->component, 81); 785 devlink_flash_update_status_notify(devlink, "Flashing done", 786 params->component, 0, 0); 787 devlink_flash_update_end_notify(devlink); 788 } 789 790 return 0; 791 } 792 793 static struct nsim_trap_item * 794 nsim_dev_trap_item_lookup(struct nsim_dev *nsim_dev, u16 trap_id) 795 { 796 struct nsim_trap_data *nsim_trap_data = nsim_dev->trap_data; 797 int i; 798 799 for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) { 800 if (nsim_traps_arr[i].id == trap_id) 801 return &nsim_trap_data->trap_items_arr[i]; 802 } 803 804 return NULL; 805 } 806 807 static int nsim_dev_devlink_trap_init(struct devlink *devlink, 808 const struct devlink_trap *trap, 809 void *trap_ctx) 810 { 811 struct nsim_dev *nsim_dev = devlink_priv(devlink); 812 struct nsim_trap_item *nsim_trap_item; 813 814 nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id); 815 if (WARN_ON(!nsim_trap_item)) 816 return -ENOENT; 817 818 nsim_trap_item->trap_ctx = trap_ctx; 819 nsim_trap_item->action = trap->init_action; 820 821 return 0; 822 } 823 824 static int 825 nsim_dev_devlink_trap_action_set(struct devlink *devlink, 826 const struct devlink_trap *trap, 827 enum devlink_trap_action action, 828 struct netlink_ext_ack *extack) 829 { 830 struct nsim_dev *nsim_dev = devlink_priv(devlink); 831 struct nsim_trap_item *nsim_trap_item; 832 833 nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id); 834 if (WARN_ON(!nsim_trap_item)) 835 return -ENOENT; 836 837 spin_lock(&nsim_dev->trap_data->trap_lock); 838 nsim_trap_item->action = action; 839 spin_unlock(&nsim_dev->trap_data->trap_lock); 840 841 return 0; 842 } 843 844 static int 845 nsim_dev_devlink_trap_group_set(struct devlink *devlink, 846 const struct devlink_trap_group *group, 847 const struct devlink_trap_policer *policer, 848 struct netlink_ext_ack *extack) 849 { 850 struct nsim_dev *nsim_dev = devlink_priv(devlink); 851 852 if (nsim_dev->fail_trap_group_set) 853 return -EINVAL; 854 855 return 0; 856 } 857 858 static int 859 nsim_dev_devlink_trap_policer_set(struct devlink *devlink, 860 const struct devlink_trap_policer *policer, 861 u64 rate, u64 burst, 862 struct netlink_ext_ack *extack) 863 { 864 struct nsim_dev *nsim_dev = devlink_priv(devlink); 865 866 if (nsim_dev->fail_trap_policer_set) { 867 NL_SET_ERR_MSG_MOD(extack, "User setup the operation to fail for testing purposes"); 868 return -EINVAL; 869 } 870 871 return 0; 872 } 873 874 static int 875 nsim_dev_devlink_trap_policer_counter_get(struct devlink *devlink, 876 const struct devlink_trap_policer *policer, 877 u64 *p_drops) 878 { 879 struct nsim_dev *nsim_dev = devlink_priv(devlink); 880 u64 *cnt; 881 882 if (nsim_dev->fail_trap_policer_counter_get) 883 return -EINVAL; 884 885 cnt = &nsim_dev->trap_data->trap_policers_cnt_arr[policer->id - 1]; 886 *p_drops = (*cnt)++; 887 888 return 0; 889 } 890 891 static const struct devlink_ops nsim_dev_devlink_ops = { 892 .supported_flash_update_params = DEVLINK_SUPPORT_FLASH_UPDATE_COMPONENT | 893 DEVLINK_SUPPORT_FLASH_UPDATE_OVERWRITE_MASK, 894 .reload_actions = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT), 895 .reload_down = nsim_dev_reload_down, 896 .reload_up = nsim_dev_reload_up, 897 .info_get = nsim_dev_info_get, 898 .flash_update = nsim_dev_flash_update, 899 .trap_init = nsim_dev_devlink_trap_init, 900 .trap_action_set = nsim_dev_devlink_trap_action_set, 901 .trap_group_set = nsim_dev_devlink_trap_group_set, 902 .trap_policer_set = nsim_dev_devlink_trap_policer_set, 903 .trap_policer_counter_get = nsim_dev_devlink_trap_policer_counter_get, 904 }; 905 906 #define NSIM_DEV_MAX_MACS_DEFAULT 32 907 #define NSIM_DEV_TEST1_DEFAULT true 908 909 static int __nsim_dev_port_add(struct nsim_dev *nsim_dev, 910 unsigned int port_index) 911 { 912 struct devlink_port_attrs attrs = {}; 913 struct nsim_dev_port *nsim_dev_port; 914 struct devlink_port *devlink_port; 915 int err; 916 917 nsim_dev_port = kzalloc(sizeof(*nsim_dev_port), GFP_KERNEL); 918 if (!nsim_dev_port) 919 return -ENOMEM; 920 nsim_dev_port->port_index = port_index; 921 922 devlink_port = &nsim_dev_port->devlink_port; 923 attrs.flavour = DEVLINK_PORT_FLAVOUR_PHYSICAL; 924 attrs.phys.port_number = port_index + 1; 925 memcpy(attrs.switch_id.id, nsim_dev->switch_id.id, nsim_dev->switch_id.id_len); 926 attrs.switch_id.id_len = nsim_dev->switch_id.id_len; 927 devlink_port_attrs_set(devlink_port, &attrs); 928 err = devlink_port_register(priv_to_devlink(nsim_dev), devlink_port, 929 port_index); 930 if (err) 931 goto err_port_free; 932 933 err = nsim_dev_port_debugfs_init(nsim_dev, nsim_dev_port); 934 if (err) 935 goto err_dl_port_unregister; 936 937 nsim_dev_port->ns = nsim_create(nsim_dev, nsim_dev_port); 938 if (IS_ERR(nsim_dev_port->ns)) { 939 err = PTR_ERR(nsim_dev_port->ns); 940 goto err_port_debugfs_exit; 941 } 942 943 devlink_port_type_eth_set(devlink_port, nsim_dev_port->ns->netdev); 944 list_add(&nsim_dev_port->list, &nsim_dev->port_list); 945 946 return 0; 947 948 err_port_debugfs_exit: 949 nsim_dev_port_debugfs_exit(nsim_dev_port); 950 err_dl_port_unregister: 951 devlink_port_unregister(devlink_port); 952 err_port_free: 953 kfree(nsim_dev_port); 954 return err; 955 } 956 957 static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port) 958 { 959 struct devlink_port *devlink_port = &nsim_dev_port->devlink_port; 960 961 list_del(&nsim_dev_port->list); 962 devlink_port_type_clear(devlink_port); 963 nsim_destroy(nsim_dev_port->ns); 964 nsim_dev_port_debugfs_exit(nsim_dev_port); 965 devlink_port_unregister(devlink_port); 966 kfree(nsim_dev_port); 967 } 968 969 static void nsim_dev_port_del_all(struct nsim_dev *nsim_dev) 970 { 971 struct nsim_dev_port *nsim_dev_port, *tmp; 972 973 mutex_lock(&nsim_dev->port_list_lock); 974 list_for_each_entry_safe(nsim_dev_port, tmp, 975 &nsim_dev->port_list, list) 976 __nsim_dev_port_del(nsim_dev_port); 977 mutex_unlock(&nsim_dev->port_list_lock); 978 } 979 980 static int nsim_dev_port_add_all(struct nsim_dev *nsim_dev, 981 unsigned int port_count) 982 { 983 int i, err; 984 985 for (i = 0; i < port_count; i++) { 986 err = __nsim_dev_port_add(nsim_dev, i); 987 if (err) 988 goto err_port_del_all; 989 } 990 return 0; 991 992 err_port_del_all: 993 nsim_dev_port_del_all(nsim_dev); 994 return err; 995 } 996 997 static int nsim_dev_reload_create(struct nsim_dev *nsim_dev, 998 struct netlink_ext_ack *extack) 999 { 1000 struct nsim_bus_dev *nsim_bus_dev = nsim_dev->nsim_bus_dev; 1001 struct devlink *devlink; 1002 int err; 1003 1004 devlink = priv_to_devlink(nsim_dev); 1005 nsim_dev = devlink_priv(devlink); 1006 INIT_LIST_HEAD(&nsim_dev->port_list); 1007 mutex_init(&nsim_dev->port_list_lock); 1008 nsim_dev->fw_update_status = true; 1009 nsim_dev->fw_update_overwrite_mask = 0; 1010 1011 nsim_dev->fib_data = nsim_fib_create(devlink, extack); 1012 if (IS_ERR(nsim_dev->fib_data)) 1013 return PTR_ERR(nsim_dev->fib_data); 1014 1015 nsim_devlink_param_load_driverinit_values(devlink); 1016 1017 err = nsim_dev_dummy_region_init(nsim_dev, devlink); 1018 if (err) 1019 goto err_fib_destroy; 1020 1021 err = nsim_dev_traps_init(devlink); 1022 if (err) 1023 goto err_dummy_region_exit; 1024 1025 err = nsim_dev_health_init(nsim_dev, devlink); 1026 if (err) 1027 goto err_traps_exit; 1028 1029 err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count); 1030 if (err) 1031 goto err_health_exit; 1032 1033 nsim_dev->take_snapshot = debugfs_create_file("take_snapshot", 1034 0200, 1035 nsim_dev->ddir, 1036 nsim_dev, 1037 &nsim_dev_take_snapshot_fops); 1038 return 0; 1039 1040 err_health_exit: 1041 nsim_dev_health_exit(nsim_dev); 1042 err_traps_exit: 1043 nsim_dev_traps_exit(devlink); 1044 err_dummy_region_exit: 1045 nsim_dev_dummy_region_exit(nsim_dev); 1046 err_fib_destroy: 1047 nsim_fib_destroy(devlink, nsim_dev->fib_data); 1048 return err; 1049 } 1050 1051 int nsim_dev_probe(struct nsim_bus_dev *nsim_bus_dev) 1052 { 1053 struct nsim_dev *nsim_dev; 1054 struct devlink *devlink; 1055 int err; 1056 1057 devlink = devlink_alloc(&nsim_dev_devlink_ops, sizeof(*nsim_dev)); 1058 if (!devlink) 1059 return -ENOMEM; 1060 devlink_net_set(devlink, nsim_bus_dev->initial_net); 1061 nsim_dev = devlink_priv(devlink); 1062 nsim_dev->nsim_bus_dev = nsim_bus_dev; 1063 nsim_dev->switch_id.id_len = sizeof(nsim_dev->switch_id.id); 1064 get_random_bytes(nsim_dev->switch_id.id, nsim_dev->switch_id.id_len); 1065 INIT_LIST_HEAD(&nsim_dev->port_list); 1066 mutex_init(&nsim_dev->port_list_lock); 1067 nsim_dev->fw_update_status = true; 1068 nsim_dev->fw_update_overwrite_mask = 0; 1069 nsim_dev->max_macs = NSIM_DEV_MAX_MACS_DEFAULT; 1070 nsim_dev->test1 = NSIM_DEV_TEST1_DEFAULT; 1071 spin_lock_init(&nsim_dev->fa_cookie_lock); 1072 1073 dev_set_drvdata(&nsim_bus_dev->dev, nsim_dev); 1074 1075 err = nsim_dev_resources_register(devlink); 1076 if (err) 1077 goto err_devlink_free; 1078 1079 nsim_dev->fib_data = nsim_fib_create(devlink, NULL); 1080 if (IS_ERR(nsim_dev->fib_data)) { 1081 err = PTR_ERR(nsim_dev->fib_data); 1082 goto err_resources_unregister; 1083 } 1084 1085 err = devlink_register(devlink, &nsim_bus_dev->dev); 1086 if (err) 1087 goto err_fib_destroy; 1088 1089 err = devlink_params_register(devlink, nsim_devlink_params, 1090 ARRAY_SIZE(nsim_devlink_params)); 1091 if (err) 1092 goto err_dl_unregister; 1093 nsim_devlink_set_params_init_values(nsim_dev, devlink); 1094 1095 err = nsim_dev_dummy_region_init(nsim_dev, devlink); 1096 if (err) 1097 goto err_params_unregister; 1098 1099 err = nsim_dev_traps_init(devlink); 1100 if (err) 1101 goto err_dummy_region_exit; 1102 1103 err = nsim_dev_debugfs_init(nsim_dev); 1104 if (err) 1105 goto err_traps_exit; 1106 1107 err = nsim_dev_health_init(nsim_dev, devlink); 1108 if (err) 1109 goto err_debugfs_exit; 1110 1111 err = nsim_bpf_dev_init(nsim_dev); 1112 if (err) 1113 goto err_health_exit; 1114 1115 err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count); 1116 if (err) 1117 goto err_bpf_dev_exit; 1118 1119 devlink_params_publish(devlink); 1120 devlink_reload_enable(devlink); 1121 return 0; 1122 1123 err_bpf_dev_exit: 1124 nsim_bpf_dev_exit(nsim_dev); 1125 err_health_exit: 1126 nsim_dev_health_exit(nsim_dev); 1127 err_debugfs_exit: 1128 nsim_dev_debugfs_exit(nsim_dev); 1129 err_traps_exit: 1130 nsim_dev_traps_exit(devlink); 1131 err_dummy_region_exit: 1132 nsim_dev_dummy_region_exit(nsim_dev); 1133 err_params_unregister: 1134 devlink_params_unregister(devlink, nsim_devlink_params, 1135 ARRAY_SIZE(nsim_devlink_params)); 1136 err_dl_unregister: 1137 devlink_unregister(devlink); 1138 err_fib_destroy: 1139 nsim_fib_destroy(devlink, nsim_dev->fib_data); 1140 err_resources_unregister: 1141 devlink_resources_unregister(devlink, NULL); 1142 err_devlink_free: 1143 devlink_free(devlink); 1144 return err; 1145 } 1146 1147 static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev) 1148 { 1149 struct devlink *devlink = priv_to_devlink(nsim_dev); 1150 1151 if (devlink_is_reload_failed(devlink)) 1152 return; 1153 debugfs_remove(nsim_dev->take_snapshot); 1154 nsim_dev_port_del_all(nsim_dev); 1155 nsim_dev_health_exit(nsim_dev); 1156 nsim_dev_traps_exit(devlink); 1157 nsim_dev_dummy_region_exit(nsim_dev); 1158 mutex_destroy(&nsim_dev->port_list_lock); 1159 nsim_fib_destroy(devlink, nsim_dev->fib_data); 1160 } 1161 1162 void nsim_dev_remove(struct nsim_bus_dev *nsim_bus_dev) 1163 { 1164 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); 1165 struct devlink *devlink = priv_to_devlink(nsim_dev); 1166 1167 devlink_reload_disable(devlink); 1168 1169 nsim_dev_reload_destroy(nsim_dev); 1170 1171 nsim_bpf_dev_exit(nsim_dev); 1172 nsim_dev_debugfs_exit(nsim_dev); 1173 devlink_params_unregister(devlink, nsim_devlink_params, 1174 ARRAY_SIZE(nsim_devlink_params)); 1175 devlink_unregister(devlink); 1176 devlink_resources_unregister(devlink, NULL); 1177 devlink_free(devlink); 1178 } 1179 1180 static struct nsim_dev_port * 1181 __nsim_dev_port_lookup(struct nsim_dev *nsim_dev, unsigned int port_index) 1182 { 1183 struct nsim_dev_port *nsim_dev_port; 1184 1185 list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list) 1186 if (nsim_dev_port->port_index == port_index) 1187 return nsim_dev_port; 1188 return NULL; 1189 } 1190 1191 int nsim_dev_port_add(struct nsim_bus_dev *nsim_bus_dev, 1192 unsigned int port_index) 1193 { 1194 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); 1195 int err; 1196 1197 mutex_lock(&nsim_dev->port_list_lock); 1198 if (__nsim_dev_port_lookup(nsim_dev, port_index)) 1199 err = -EEXIST; 1200 else 1201 err = __nsim_dev_port_add(nsim_dev, port_index); 1202 mutex_unlock(&nsim_dev->port_list_lock); 1203 return err; 1204 } 1205 1206 int nsim_dev_port_del(struct nsim_bus_dev *nsim_bus_dev, 1207 unsigned int port_index) 1208 { 1209 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); 1210 struct nsim_dev_port *nsim_dev_port; 1211 int err = 0; 1212 1213 mutex_lock(&nsim_dev->port_list_lock); 1214 nsim_dev_port = __nsim_dev_port_lookup(nsim_dev, port_index); 1215 if (!nsim_dev_port) 1216 err = -ENOENT; 1217 else 1218 __nsim_dev_port_del(nsim_dev_port); 1219 mutex_unlock(&nsim_dev->port_list_lock); 1220 return err; 1221 } 1222 1223 int nsim_dev_init(void) 1224 { 1225 nsim_dev_ddir = debugfs_create_dir(DRV_NAME, NULL); 1226 return PTR_ERR_OR_ZERO(nsim_dev_ddir); 1227 } 1228 1229 void nsim_dev_exit(void) 1230 { 1231 debugfs_remove_recursive(nsim_dev_ddir); 1232 } 1233