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 }; 100 101 static ssize_t nsim_dev_trap_fa_cookie_read(struct file *file, 102 char __user *data, 103 size_t count, loff_t *ppos) 104 { 105 struct nsim_dev *nsim_dev = file->private_data; 106 struct flow_action_cookie *fa_cookie; 107 unsigned int buf_len; 108 ssize_t ret; 109 char *buf; 110 111 spin_lock(&nsim_dev->fa_cookie_lock); 112 fa_cookie = nsim_dev->fa_cookie; 113 if (!fa_cookie) { 114 ret = -EINVAL; 115 goto errout; 116 } 117 buf_len = fa_cookie->cookie_len * 2; 118 buf = kmalloc(buf_len, GFP_ATOMIC); 119 if (!buf) { 120 ret = -ENOMEM; 121 goto errout; 122 } 123 bin2hex(buf, fa_cookie->cookie, fa_cookie->cookie_len); 124 spin_unlock(&nsim_dev->fa_cookie_lock); 125 126 ret = simple_read_from_buffer(data, count, ppos, buf, buf_len); 127 128 kfree(buf); 129 return ret; 130 131 errout: 132 spin_unlock(&nsim_dev->fa_cookie_lock); 133 return ret; 134 } 135 136 static ssize_t nsim_dev_trap_fa_cookie_write(struct file *file, 137 const char __user *data, 138 size_t count, loff_t *ppos) 139 { 140 struct nsim_dev *nsim_dev = file->private_data; 141 struct flow_action_cookie *fa_cookie; 142 size_t cookie_len; 143 ssize_t ret; 144 char *buf; 145 146 if (*ppos != 0) 147 return -EINVAL; 148 cookie_len = (count - 1) / 2; 149 if ((count - 1) % 2) 150 return -EINVAL; 151 buf = kmalloc(count, GFP_KERNEL | __GFP_NOWARN); 152 if (!buf) 153 return -ENOMEM; 154 155 ret = simple_write_to_buffer(buf, count, ppos, data, count); 156 if (ret < 0) 157 goto free_buf; 158 159 fa_cookie = kmalloc(sizeof(*fa_cookie) + cookie_len, 160 GFP_KERNEL | __GFP_NOWARN); 161 if (!fa_cookie) { 162 ret = -ENOMEM; 163 goto free_buf; 164 } 165 166 fa_cookie->cookie_len = cookie_len; 167 ret = hex2bin(fa_cookie->cookie, buf, cookie_len); 168 if (ret) 169 goto free_fa_cookie; 170 kfree(buf); 171 172 spin_lock(&nsim_dev->fa_cookie_lock); 173 kfree(nsim_dev->fa_cookie); 174 nsim_dev->fa_cookie = fa_cookie; 175 spin_unlock(&nsim_dev->fa_cookie_lock); 176 177 return count; 178 179 free_fa_cookie: 180 kfree(fa_cookie); 181 free_buf: 182 kfree(buf); 183 return ret; 184 } 185 186 static const struct file_operations nsim_dev_trap_fa_cookie_fops = { 187 .open = simple_open, 188 .read = nsim_dev_trap_fa_cookie_read, 189 .write = nsim_dev_trap_fa_cookie_write, 190 .llseek = generic_file_llseek, 191 }; 192 193 static int nsim_dev_debugfs_init(struct nsim_dev *nsim_dev) 194 { 195 char dev_ddir_name[sizeof(DRV_NAME) + 10]; 196 197 sprintf(dev_ddir_name, DRV_NAME "%u", nsim_dev->nsim_bus_dev->dev.id); 198 nsim_dev->ddir = debugfs_create_dir(dev_ddir_name, nsim_dev_ddir); 199 if (IS_ERR(nsim_dev->ddir)) 200 return PTR_ERR(nsim_dev->ddir); 201 nsim_dev->ports_ddir = debugfs_create_dir("ports", nsim_dev->ddir); 202 if (IS_ERR(nsim_dev->ports_ddir)) 203 return PTR_ERR(nsim_dev->ports_ddir); 204 debugfs_create_bool("fw_update_status", 0600, nsim_dev->ddir, 205 &nsim_dev->fw_update_status); 206 debugfs_create_u32("fw_update_overwrite_mask", 0600, nsim_dev->ddir, 207 &nsim_dev->fw_update_overwrite_mask); 208 debugfs_create_u32("max_macs", 0600, nsim_dev->ddir, 209 &nsim_dev->max_macs); 210 debugfs_create_bool("test1", 0600, nsim_dev->ddir, 211 &nsim_dev->test1); 212 nsim_dev->take_snapshot = debugfs_create_file("take_snapshot", 213 0200, 214 nsim_dev->ddir, 215 nsim_dev, 216 &nsim_dev_take_snapshot_fops); 217 debugfs_create_bool("dont_allow_reload", 0600, nsim_dev->ddir, 218 &nsim_dev->dont_allow_reload); 219 debugfs_create_bool("fail_reload", 0600, nsim_dev->ddir, 220 &nsim_dev->fail_reload); 221 debugfs_create_file("trap_flow_action_cookie", 0600, nsim_dev->ddir, 222 nsim_dev, &nsim_dev_trap_fa_cookie_fops); 223 debugfs_create_bool("fail_trap_group_set", 0600, 224 nsim_dev->ddir, 225 &nsim_dev->fail_trap_group_set); 226 debugfs_create_bool("fail_trap_policer_set", 0600, 227 nsim_dev->ddir, 228 &nsim_dev->fail_trap_policer_set); 229 debugfs_create_bool("fail_trap_policer_counter_get", 0600, 230 nsim_dev->ddir, 231 &nsim_dev->fail_trap_policer_counter_get); 232 nsim_udp_tunnels_debugfs_create(nsim_dev); 233 return 0; 234 } 235 236 static void nsim_dev_debugfs_exit(struct nsim_dev *nsim_dev) 237 { 238 debugfs_remove_recursive(nsim_dev->ports_ddir); 239 debugfs_remove_recursive(nsim_dev->ddir); 240 } 241 242 static int nsim_dev_port_debugfs_init(struct nsim_dev *nsim_dev, 243 struct nsim_dev_port *nsim_dev_port) 244 { 245 char port_ddir_name[16]; 246 char dev_link_name[32]; 247 248 sprintf(port_ddir_name, "%u", nsim_dev_port->port_index); 249 nsim_dev_port->ddir = debugfs_create_dir(port_ddir_name, 250 nsim_dev->ports_ddir); 251 if (IS_ERR(nsim_dev_port->ddir)) 252 return PTR_ERR(nsim_dev_port->ddir); 253 254 sprintf(dev_link_name, "../../../" DRV_NAME "%u", 255 nsim_dev->nsim_bus_dev->dev.id); 256 debugfs_create_symlink("dev", nsim_dev_port->ddir, dev_link_name); 257 258 return 0; 259 } 260 261 static void nsim_dev_port_debugfs_exit(struct nsim_dev_port *nsim_dev_port) 262 { 263 debugfs_remove_recursive(nsim_dev_port->ddir); 264 } 265 266 static int nsim_dev_resources_register(struct devlink *devlink) 267 { 268 struct devlink_resource_size_params params = { 269 .size_max = (u64)-1, 270 .size_granularity = 1, 271 .unit = DEVLINK_RESOURCE_UNIT_ENTRY 272 }; 273 int err; 274 275 /* Resources for IPv4 */ 276 err = devlink_resource_register(devlink, "IPv4", (u64)-1, 277 NSIM_RESOURCE_IPV4, 278 DEVLINK_RESOURCE_ID_PARENT_TOP, 279 ¶ms); 280 if (err) { 281 pr_err("Failed to register IPv4 top resource\n"); 282 goto out; 283 } 284 285 err = devlink_resource_register(devlink, "fib", (u64)-1, 286 NSIM_RESOURCE_IPV4_FIB, 287 NSIM_RESOURCE_IPV4, ¶ms); 288 if (err) { 289 pr_err("Failed to register IPv4 FIB resource\n"); 290 return err; 291 } 292 293 err = devlink_resource_register(devlink, "fib-rules", (u64)-1, 294 NSIM_RESOURCE_IPV4_FIB_RULES, 295 NSIM_RESOURCE_IPV4, ¶ms); 296 if (err) { 297 pr_err("Failed to register IPv4 FIB rules resource\n"); 298 return err; 299 } 300 301 /* Resources for IPv6 */ 302 err = devlink_resource_register(devlink, "IPv6", (u64)-1, 303 NSIM_RESOURCE_IPV6, 304 DEVLINK_RESOURCE_ID_PARENT_TOP, 305 ¶ms); 306 if (err) { 307 pr_err("Failed to register IPv6 top resource\n"); 308 goto out; 309 } 310 311 err = devlink_resource_register(devlink, "fib", (u64)-1, 312 NSIM_RESOURCE_IPV6_FIB, 313 NSIM_RESOURCE_IPV6, ¶ms); 314 if (err) { 315 pr_err("Failed to register IPv6 FIB resource\n"); 316 return err; 317 } 318 319 err = devlink_resource_register(devlink, "fib-rules", (u64)-1, 320 NSIM_RESOURCE_IPV6_FIB_RULES, 321 NSIM_RESOURCE_IPV6, ¶ms); 322 if (err) { 323 pr_err("Failed to register IPv6 FIB rules resource\n"); 324 return err; 325 } 326 327 out: 328 return err; 329 } 330 331 enum nsim_devlink_param_id { 332 NSIM_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX, 333 NSIM_DEVLINK_PARAM_ID_TEST1, 334 }; 335 336 static const struct devlink_param nsim_devlink_params[] = { 337 DEVLINK_PARAM_GENERIC(MAX_MACS, 338 BIT(DEVLINK_PARAM_CMODE_DRIVERINIT), 339 NULL, NULL, NULL), 340 DEVLINK_PARAM_DRIVER(NSIM_DEVLINK_PARAM_ID_TEST1, 341 "test1", DEVLINK_PARAM_TYPE_BOOL, 342 BIT(DEVLINK_PARAM_CMODE_DRIVERINIT), 343 NULL, NULL, NULL), 344 }; 345 346 static void nsim_devlink_set_params_init_values(struct nsim_dev *nsim_dev, 347 struct devlink *devlink) 348 { 349 union devlink_param_value value; 350 351 value.vu32 = nsim_dev->max_macs; 352 devlink_param_driverinit_value_set(devlink, 353 DEVLINK_PARAM_GENERIC_ID_MAX_MACS, 354 value); 355 value.vbool = nsim_dev->test1; 356 devlink_param_driverinit_value_set(devlink, 357 NSIM_DEVLINK_PARAM_ID_TEST1, 358 value); 359 } 360 361 static void nsim_devlink_param_load_driverinit_values(struct devlink *devlink) 362 { 363 struct nsim_dev *nsim_dev = devlink_priv(devlink); 364 union devlink_param_value saved_value; 365 int err; 366 367 err = devlink_param_driverinit_value_get(devlink, 368 DEVLINK_PARAM_GENERIC_ID_MAX_MACS, 369 &saved_value); 370 if (!err) 371 nsim_dev->max_macs = saved_value.vu32; 372 err = devlink_param_driverinit_value_get(devlink, 373 NSIM_DEVLINK_PARAM_ID_TEST1, 374 &saved_value); 375 if (!err) 376 nsim_dev->test1 = saved_value.vbool; 377 } 378 379 #define NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX 16 380 381 static const struct devlink_region_ops dummy_region_ops = { 382 .name = "dummy", 383 .destructor = &kfree, 384 .snapshot = nsim_dev_take_snapshot, 385 }; 386 387 static int nsim_dev_dummy_region_init(struct nsim_dev *nsim_dev, 388 struct devlink *devlink) 389 { 390 nsim_dev->dummy_region = 391 devlink_region_create(devlink, &dummy_region_ops, 392 NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX, 393 NSIM_DEV_DUMMY_REGION_SIZE); 394 return PTR_ERR_OR_ZERO(nsim_dev->dummy_region); 395 } 396 397 static void nsim_dev_dummy_region_exit(struct nsim_dev *nsim_dev) 398 { 399 devlink_region_destroy(nsim_dev->dummy_region); 400 } 401 402 struct nsim_trap_item { 403 void *trap_ctx; 404 enum devlink_trap_action action; 405 }; 406 407 struct nsim_trap_data { 408 struct delayed_work trap_report_dw; 409 struct nsim_trap_item *trap_items_arr; 410 u64 *trap_policers_cnt_arr; 411 struct nsim_dev *nsim_dev; 412 spinlock_t trap_lock; /* Protects trap_items_arr */ 413 }; 414 415 /* All driver-specific traps must be documented in 416 * Documentation/networking/devlink/netdevsim.rst 417 */ 418 enum { 419 NSIM_TRAP_ID_BASE = DEVLINK_TRAP_GENERIC_ID_MAX, 420 NSIM_TRAP_ID_FID_MISS, 421 }; 422 423 #define NSIM_TRAP_NAME_FID_MISS "fid_miss" 424 425 #define NSIM_TRAP_METADATA DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT 426 427 #define NSIM_TRAP_DROP(_id, _group_id) \ 428 DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \ 429 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ 430 NSIM_TRAP_METADATA) 431 #define NSIM_TRAP_DROP_EXT(_id, _group_id, _metadata) \ 432 DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \ 433 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ 434 NSIM_TRAP_METADATA | (_metadata)) 435 #define NSIM_TRAP_EXCEPTION(_id, _group_id) \ 436 DEVLINK_TRAP_GENERIC(EXCEPTION, TRAP, _id, \ 437 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ 438 NSIM_TRAP_METADATA) 439 #define NSIM_TRAP_CONTROL(_id, _group_id, _action) \ 440 DEVLINK_TRAP_GENERIC(CONTROL, _action, _id, \ 441 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ 442 NSIM_TRAP_METADATA) 443 #define NSIM_TRAP_DRIVER_EXCEPTION(_id, _group_id) \ 444 DEVLINK_TRAP_DRIVER(EXCEPTION, TRAP, NSIM_TRAP_ID_##_id, \ 445 NSIM_TRAP_NAME_##_id, \ 446 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ 447 NSIM_TRAP_METADATA) 448 449 #define NSIM_DEV_TRAP_POLICER_MIN_RATE 1 450 #define NSIM_DEV_TRAP_POLICER_MAX_RATE 8000 451 #define NSIM_DEV_TRAP_POLICER_MIN_BURST 8 452 #define NSIM_DEV_TRAP_POLICER_MAX_BURST 65536 453 454 #define NSIM_TRAP_POLICER(_id, _rate, _burst) \ 455 DEVLINK_TRAP_POLICER(_id, _rate, _burst, \ 456 NSIM_DEV_TRAP_POLICER_MAX_RATE, \ 457 NSIM_DEV_TRAP_POLICER_MIN_RATE, \ 458 NSIM_DEV_TRAP_POLICER_MAX_BURST, \ 459 NSIM_DEV_TRAP_POLICER_MIN_BURST) 460 461 static const struct devlink_trap_policer nsim_trap_policers_arr[] = { 462 NSIM_TRAP_POLICER(1, 1000, 128), 463 NSIM_TRAP_POLICER(2, 2000, 256), 464 NSIM_TRAP_POLICER(3, 3000, 512), 465 }; 466 467 static const struct devlink_trap_group nsim_trap_groups_arr[] = { 468 DEVLINK_TRAP_GROUP_GENERIC(L2_DROPS, 0), 469 DEVLINK_TRAP_GROUP_GENERIC(L3_DROPS, 1), 470 DEVLINK_TRAP_GROUP_GENERIC(L3_EXCEPTIONS, 1), 471 DEVLINK_TRAP_GROUP_GENERIC(BUFFER_DROPS, 2), 472 DEVLINK_TRAP_GROUP_GENERIC(ACL_DROPS, 3), 473 DEVLINK_TRAP_GROUP_GENERIC(MC_SNOOPING, 3), 474 }; 475 476 static const struct devlink_trap nsim_traps_arr[] = { 477 NSIM_TRAP_DROP(SMAC_MC, L2_DROPS), 478 NSIM_TRAP_DROP(VLAN_TAG_MISMATCH, L2_DROPS), 479 NSIM_TRAP_DROP(INGRESS_VLAN_FILTER, L2_DROPS), 480 NSIM_TRAP_DROP(INGRESS_STP_FILTER, L2_DROPS), 481 NSIM_TRAP_DROP(EMPTY_TX_LIST, L2_DROPS), 482 NSIM_TRAP_DROP(PORT_LOOPBACK_FILTER, L2_DROPS), 483 NSIM_TRAP_DRIVER_EXCEPTION(FID_MISS, L2_DROPS), 484 NSIM_TRAP_DROP(BLACKHOLE_ROUTE, L3_DROPS), 485 NSIM_TRAP_EXCEPTION(TTL_ERROR, L3_EXCEPTIONS), 486 NSIM_TRAP_DROP(TAIL_DROP, BUFFER_DROPS), 487 NSIM_TRAP_DROP_EXT(INGRESS_FLOW_ACTION_DROP, ACL_DROPS, 488 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE), 489 NSIM_TRAP_DROP_EXT(EGRESS_FLOW_ACTION_DROP, ACL_DROPS, 490 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE), 491 NSIM_TRAP_CONTROL(IGMP_QUERY, MC_SNOOPING, MIRROR), 492 NSIM_TRAP_CONTROL(IGMP_V1_REPORT, MC_SNOOPING, TRAP), 493 }; 494 495 #define NSIM_TRAP_L4_DATA_LEN 100 496 497 static struct sk_buff *nsim_dev_trap_skb_build(void) 498 { 499 int tot_len, data_len = NSIM_TRAP_L4_DATA_LEN; 500 struct sk_buff *skb; 501 struct udphdr *udph; 502 struct ethhdr *eth; 503 struct iphdr *iph; 504 505 skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); 506 if (!skb) 507 return NULL; 508 tot_len = sizeof(struct iphdr) + sizeof(struct udphdr) + data_len; 509 510 skb_reset_mac_header(skb); 511 eth = skb_put(skb, sizeof(struct ethhdr)); 512 eth_random_addr(eth->h_dest); 513 eth_random_addr(eth->h_source); 514 eth->h_proto = htons(ETH_P_IP); 515 skb->protocol = htons(ETH_P_IP); 516 517 skb_set_network_header(skb, skb->len); 518 iph = skb_put(skb, sizeof(struct iphdr)); 519 iph->protocol = IPPROTO_UDP; 520 iph->saddr = in_aton("192.0.2.1"); 521 iph->daddr = in_aton("198.51.100.1"); 522 iph->version = 0x4; 523 iph->frag_off = 0; 524 iph->ihl = 0x5; 525 iph->tot_len = htons(tot_len); 526 iph->ttl = 100; 527 iph->check = 0; 528 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl); 529 530 skb_set_transport_header(skb, skb->len); 531 udph = skb_put_zero(skb, sizeof(struct udphdr) + data_len); 532 get_random_bytes(&udph->source, sizeof(u16)); 533 get_random_bytes(&udph->dest, sizeof(u16)); 534 udph->len = htons(sizeof(struct udphdr) + data_len); 535 536 return skb; 537 } 538 539 static void nsim_dev_trap_report(struct nsim_dev_port *nsim_dev_port) 540 { 541 struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev; 542 struct devlink *devlink = priv_to_devlink(nsim_dev); 543 struct nsim_trap_data *nsim_trap_data; 544 int i; 545 546 nsim_trap_data = nsim_dev->trap_data; 547 548 spin_lock(&nsim_trap_data->trap_lock); 549 for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) { 550 struct flow_action_cookie *fa_cookie = NULL; 551 struct nsim_trap_item *nsim_trap_item; 552 struct sk_buff *skb; 553 bool has_fa_cookie; 554 555 has_fa_cookie = nsim_traps_arr[i].metadata_cap & 556 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE; 557 558 nsim_trap_item = &nsim_trap_data->trap_items_arr[i]; 559 if (nsim_trap_item->action == DEVLINK_TRAP_ACTION_DROP) 560 continue; 561 562 skb = nsim_dev_trap_skb_build(); 563 if (!skb) 564 continue; 565 skb->dev = nsim_dev_port->ns->netdev; 566 567 /* Trapped packets are usually passed to devlink in softIRQ, 568 * but in this case they are generated in a workqueue. Disable 569 * softIRQs to prevent lockdep from complaining about 570 * "incosistent lock state". 571 */ 572 573 spin_lock_bh(&nsim_dev->fa_cookie_lock); 574 fa_cookie = has_fa_cookie ? nsim_dev->fa_cookie : NULL; 575 devlink_trap_report(devlink, skb, nsim_trap_item->trap_ctx, 576 &nsim_dev_port->devlink_port, fa_cookie); 577 spin_unlock_bh(&nsim_dev->fa_cookie_lock); 578 consume_skb(skb); 579 } 580 spin_unlock(&nsim_trap_data->trap_lock); 581 } 582 583 #define NSIM_TRAP_REPORT_INTERVAL_MS 100 584 585 static void nsim_dev_trap_report_work(struct work_struct *work) 586 { 587 struct nsim_trap_data *nsim_trap_data; 588 struct nsim_dev_port *nsim_dev_port; 589 struct nsim_dev *nsim_dev; 590 591 nsim_trap_data = container_of(work, struct nsim_trap_data, 592 trap_report_dw.work); 593 nsim_dev = nsim_trap_data->nsim_dev; 594 595 /* For each running port and enabled packet trap, generate a UDP 596 * packet with a random 5-tuple and report it. 597 */ 598 mutex_lock(&nsim_dev->port_list_lock); 599 list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list) { 600 if (!netif_running(nsim_dev_port->ns->netdev)) 601 continue; 602 603 nsim_dev_trap_report(nsim_dev_port); 604 } 605 mutex_unlock(&nsim_dev->port_list_lock); 606 607 schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw, 608 msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS)); 609 } 610 611 static int nsim_dev_traps_init(struct devlink *devlink) 612 { 613 size_t policers_count = ARRAY_SIZE(nsim_trap_policers_arr); 614 struct nsim_dev *nsim_dev = devlink_priv(devlink); 615 struct nsim_trap_data *nsim_trap_data; 616 int err; 617 618 nsim_trap_data = kzalloc(sizeof(*nsim_trap_data), GFP_KERNEL); 619 if (!nsim_trap_data) 620 return -ENOMEM; 621 622 nsim_trap_data->trap_items_arr = kcalloc(ARRAY_SIZE(nsim_traps_arr), 623 sizeof(struct nsim_trap_item), 624 GFP_KERNEL); 625 if (!nsim_trap_data->trap_items_arr) { 626 err = -ENOMEM; 627 goto err_trap_data_free; 628 } 629 630 nsim_trap_data->trap_policers_cnt_arr = kcalloc(policers_count, 631 sizeof(u64), 632 GFP_KERNEL); 633 if (!nsim_trap_data->trap_policers_cnt_arr) { 634 err = -ENOMEM; 635 goto err_trap_items_free; 636 } 637 638 /* The lock is used to protect the action state of the registered 639 * traps. The value is written by user and read in delayed work when 640 * iterating over all the traps. 641 */ 642 spin_lock_init(&nsim_trap_data->trap_lock); 643 nsim_trap_data->nsim_dev = nsim_dev; 644 nsim_dev->trap_data = nsim_trap_data; 645 646 err = devlink_trap_policers_register(devlink, nsim_trap_policers_arr, 647 policers_count); 648 if (err) 649 goto err_trap_policers_cnt_free; 650 651 err = devlink_trap_groups_register(devlink, nsim_trap_groups_arr, 652 ARRAY_SIZE(nsim_trap_groups_arr)); 653 if (err) 654 goto err_trap_policers_unregister; 655 656 err = devlink_traps_register(devlink, nsim_traps_arr, 657 ARRAY_SIZE(nsim_traps_arr), NULL); 658 if (err) 659 goto err_trap_groups_unregister; 660 661 INIT_DELAYED_WORK(&nsim_dev->trap_data->trap_report_dw, 662 nsim_dev_trap_report_work); 663 schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw, 664 msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS)); 665 666 return 0; 667 668 err_trap_groups_unregister: 669 devlink_trap_groups_unregister(devlink, nsim_trap_groups_arr, 670 ARRAY_SIZE(nsim_trap_groups_arr)); 671 err_trap_policers_unregister: 672 devlink_trap_policers_unregister(devlink, nsim_trap_policers_arr, 673 ARRAY_SIZE(nsim_trap_policers_arr)); 674 err_trap_policers_cnt_free: 675 kfree(nsim_trap_data->trap_policers_cnt_arr); 676 err_trap_items_free: 677 kfree(nsim_trap_data->trap_items_arr); 678 err_trap_data_free: 679 kfree(nsim_trap_data); 680 return err; 681 } 682 683 static void nsim_dev_traps_exit(struct devlink *devlink) 684 { 685 struct nsim_dev *nsim_dev = devlink_priv(devlink); 686 687 cancel_delayed_work_sync(&nsim_dev->trap_data->trap_report_dw); 688 devlink_traps_unregister(devlink, nsim_traps_arr, 689 ARRAY_SIZE(nsim_traps_arr)); 690 devlink_trap_groups_unregister(devlink, nsim_trap_groups_arr, 691 ARRAY_SIZE(nsim_trap_groups_arr)); 692 devlink_trap_policers_unregister(devlink, nsim_trap_policers_arr, 693 ARRAY_SIZE(nsim_trap_policers_arr)); 694 kfree(nsim_dev->trap_data->trap_policers_cnt_arr); 695 kfree(nsim_dev->trap_data->trap_items_arr); 696 kfree(nsim_dev->trap_data); 697 } 698 699 static int nsim_dev_reload_create(struct nsim_dev *nsim_dev, 700 struct netlink_ext_ack *extack); 701 static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev); 702 703 static int nsim_dev_reload_down(struct devlink *devlink, bool netns_change, 704 struct netlink_ext_ack *extack) 705 { 706 struct nsim_dev *nsim_dev = devlink_priv(devlink); 707 708 if (nsim_dev->dont_allow_reload) { 709 /* For testing purposes, user set debugfs dont_allow_reload 710 * value to true. So forbid it. 711 */ 712 NL_SET_ERR_MSG_MOD(extack, "User forbid the reload for testing purposes"); 713 return -EOPNOTSUPP; 714 } 715 716 nsim_dev_reload_destroy(nsim_dev); 717 return 0; 718 } 719 720 static int nsim_dev_reload_up(struct devlink *devlink, 721 struct netlink_ext_ack *extack) 722 { 723 struct nsim_dev *nsim_dev = devlink_priv(devlink); 724 725 if (nsim_dev->fail_reload) { 726 /* For testing purposes, user set debugfs fail_reload 727 * value to true. Fail right away. 728 */ 729 NL_SET_ERR_MSG_MOD(extack, "User setup the reload to fail for testing purposes"); 730 return -EINVAL; 731 } 732 733 return nsim_dev_reload_create(nsim_dev, extack); 734 } 735 736 static int nsim_dev_info_get(struct devlink *devlink, 737 struct devlink_info_req *req, 738 struct netlink_ext_ack *extack) 739 { 740 return devlink_info_driver_name_put(req, DRV_NAME); 741 } 742 743 #define NSIM_DEV_FLASH_SIZE 500000 744 #define NSIM_DEV_FLASH_CHUNK_SIZE 1000 745 #define NSIM_DEV_FLASH_CHUNK_TIME_MS 10 746 747 static int nsim_dev_flash_update(struct devlink *devlink, 748 struct devlink_flash_update_params *params, 749 struct netlink_ext_ack *extack) 750 { 751 struct nsim_dev *nsim_dev = devlink_priv(devlink); 752 int i; 753 754 if ((params->overwrite_mask & ~nsim_dev->fw_update_overwrite_mask) != 0) 755 return -EOPNOTSUPP; 756 757 if (nsim_dev->fw_update_status) { 758 devlink_flash_update_begin_notify(devlink); 759 devlink_flash_update_status_notify(devlink, 760 "Preparing to flash", 761 params->component, 0, 0); 762 } 763 764 for (i = 0; i < NSIM_DEV_FLASH_SIZE / NSIM_DEV_FLASH_CHUNK_SIZE; i++) { 765 if (nsim_dev->fw_update_status) 766 devlink_flash_update_status_notify(devlink, "Flashing", 767 params->component, 768 i * NSIM_DEV_FLASH_CHUNK_SIZE, 769 NSIM_DEV_FLASH_SIZE); 770 msleep(NSIM_DEV_FLASH_CHUNK_TIME_MS); 771 } 772 773 if (nsim_dev->fw_update_status) { 774 devlink_flash_update_status_notify(devlink, "Flashing", 775 params->component, 776 NSIM_DEV_FLASH_SIZE, 777 NSIM_DEV_FLASH_SIZE); 778 devlink_flash_update_timeout_notify(devlink, "Flash select", 779 params->component, 81); 780 devlink_flash_update_status_notify(devlink, "Flashing done", 781 params->component, 0, 0); 782 devlink_flash_update_end_notify(devlink); 783 } 784 785 return 0; 786 } 787 788 static struct nsim_trap_item * 789 nsim_dev_trap_item_lookup(struct nsim_dev *nsim_dev, u16 trap_id) 790 { 791 struct nsim_trap_data *nsim_trap_data = nsim_dev->trap_data; 792 int i; 793 794 for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) { 795 if (nsim_traps_arr[i].id == trap_id) 796 return &nsim_trap_data->trap_items_arr[i]; 797 } 798 799 return NULL; 800 } 801 802 static int nsim_dev_devlink_trap_init(struct devlink *devlink, 803 const struct devlink_trap *trap, 804 void *trap_ctx) 805 { 806 struct nsim_dev *nsim_dev = devlink_priv(devlink); 807 struct nsim_trap_item *nsim_trap_item; 808 809 nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id); 810 if (WARN_ON(!nsim_trap_item)) 811 return -ENOENT; 812 813 nsim_trap_item->trap_ctx = trap_ctx; 814 nsim_trap_item->action = trap->init_action; 815 816 return 0; 817 } 818 819 static int 820 nsim_dev_devlink_trap_action_set(struct devlink *devlink, 821 const struct devlink_trap *trap, 822 enum devlink_trap_action action, 823 struct netlink_ext_ack *extack) 824 { 825 struct nsim_dev *nsim_dev = devlink_priv(devlink); 826 struct nsim_trap_item *nsim_trap_item; 827 828 nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id); 829 if (WARN_ON(!nsim_trap_item)) 830 return -ENOENT; 831 832 spin_lock(&nsim_dev->trap_data->trap_lock); 833 nsim_trap_item->action = action; 834 spin_unlock(&nsim_dev->trap_data->trap_lock); 835 836 return 0; 837 } 838 839 static int 840 nsim_dev_devlink_trap_group_set(struct devlink *devlink, 841 const struct devlink_trap_group *group, 842 const struct devlink_trap_policer *policer, 843 struct netlink_ext_ack *extack) 844 { 845 struct nsim_dev *nsim_dev = devlink_priv(devlink); 846 847 if (nsim_dev->fail_trap_group_set) 848 return -EINVAL; 849 850 return 0; 851 } 852 853 static int 854 nsim_dev_devlink_trap_policer_set(struct devlink *devlink, 855 const struct devlink_trap_policer *policer, 856 u64 rate, u64 burst, 857 struct netlink_ext_ack *extack) 858 { 859 struct nsim_dev *nsim_dev = devlink_priv(devlink); 860 861 if (nsim_dev->fail_trap_policer_set) { 862 NL_SET_ERR_MSG_MOD(extack, "User setup the operation to fail for testing purposes"); 863 return -EINVAL; 864 } 865 866 return 0; 867 } 868 869 static int 870 nsim_dev_devlink_trap_policer_counter_get(struct devlink *devlink, 871 const struct devlink_trap_policer *policer, 872 u64 *p_drops) 873 { 874 struct nsim_dev *nsim_dev = devlink_priv(devlink); 875 u64 *cnt; 876 877 if (nsim_dev->fail_trap_policer_counter_get) 878 return -EINVAL; 879 880 cnt = &nsim_dev->trap_data->trap_policers_cnt_arr[policer->id - 1]; 881 *p_drops = (*cnt)++; 882 883 return 0; 884 } 885 886 static const struct devlink_ops nsim_dev_devlink_ops = { 887 .supported_flash_update_params = DEVLINK_SUPPORT_FLASH_UPDATE_COMPONENT | 888 DEVLINK_SUPPORT_FLASH_UPDATE_OVERWRITE_MASK, 889 .reload_down = nsim_dev_reload_down, 890 .reload_up = nsim_dev_reload_up, 891 .info_get = nsim_dev_info_get, 892 .flash_update = nsim_dev_flash_update, 893 .trap_init = nsim_dev_devlink_trap_init, 894 .trap_action_set = nsim_dev_devlink_trap_action_set, 895 .trap_group_set = nsim_dev_devlink_trap_group_set, 896 .trap_policer_set = nsim_dev_devlink_trap_policer_set, 897 .trap_policer_counter_get = nsim_dev_devlink_trap_policer_counter_get, 898 }; 899 900 #define NSIM_DEV_MAX_MACS_DEFAULT 32 901 #define NSIM_DEV_TEST1_DEFAULT true 902 903 static int __nsim_dev_port_add(struct nsim_dev *nsim_dev, 904 unsigned int port_index) 905 { 906 struct devlink_port_attrs attrs = {}; 907 struct nsim_dev_port *nsim_dev_port; 908 struct devlink_port *devlink_port; 909 int err; 910 911 nsim_dev_port = kzalloc(sizeof(*nsim_dev_port), GFP_KERNEL); 912 if (!nsim_dev_port) 913 return -ENOMEM; 914 nsim_dev_port->port_index = port_index; 915 916 devlink_port = &nsim_dev_port->devlink_port; 917 attrs.flavour = DEVLINK_PORT_FLAVOUR_PHYSICAL; 918 attrs.phys.port_number = port_index + 1; 919 memcpy(attrs.switch_id.id, nsim_dev->switch_id.id, nsim_dev->switch_id.id_len); 920 attrs.switch_id.id_len = nsim_dev->switch_id.id_len; 921 devlink_port_attrs_set(devlink_port, &attrs); 922 err = devlink_port_register(priv_to_devlink(nsim_dev), devlink_port, 923 port_index); 924 if (err) 925 goto err_port_free; 926 927 err = nsim_dev_port_debugfs_init(nsim_dev, nsim_dev_port); 928 if (err) 929 goto err_dl_port_unregister; 930 931 nsim_dev_port->ns = nsim_create(nsim_dev, nsim_dev_port); 932 if (IS_ERR(nsim_dev_port->ns)) { 933 err = PTR_ERR(nsim_dev_port->ns); 934 goto err_port_debugfs_exit; 935 } 936 937 devlink_port_type_eth_set(devlink_port, nsim_dev_port->ns->netdev); 938 list_add(&nsim_dev_port->list, &nsim_dev->port_list); 939 940 return 0; 941 942 err_port_debugfs_exit: 943 nsim_dev_port_debugfs_exit(nsim_dev_port); 944 err_dl_port_unregister: 945 devlink_port_unregister(devlink_port); 946 err_port_free: 947 kfree(nsim_dev_port); 948 return err; 949 } 950 951 static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port) 952 { 953 struct devlink_port *devlink_port = &nsim_dev_port->devlink_port; 954 955 list_del(&nsim_dev_port->list); 956 devlink_port_type_clear(devlink_port); 957 nsim_destroy(nsim_dev_port->ns); 958 nsim_dev_port_debugfs_exit(nsim_dev_port); 959 devlink_port_unregister(devlink_port); 960 kfree(nsim_dev_port); 961 } 962 963 static void nsim_dev_port_del_all(struct nsim_dev *nsim_dev) 964 { 965 struct nsim_dev_port *nsim_dev_port, *tmp; 966 967 mutex_lock(&nsim_dev->port_list_lock); 968 list_for_each_entry_safe(nsim_dev_port, tmp, 969 &nsim_dev->port_list, list) 970 __nsim_dev_port_del(nsim_dev_port); 971 mutex_unlock(&nsim_dev->port_list_lock); 972 } 973 974 static int nsim_dev_port_add_all(struct nsim_dev *nsim_dev, 975 unsigned int port_count) 976 { 977 int i, err; 978 979 for (i = 0; i < port_count; i++) { 980 err = __nsim_dev_port_add(nsim_dev, i); 981 if (err) 982 goto err_port_del_all; 983 } 984 return 0; 985 986 err_port_del_all: 987 nsim_dev_port_del_all(nsim_dev); 988 return err; 989 } 990 991 static int nsim_dev_reload_create(struct nsim_dev *nsim_dev, 992 struct netlink_ext_ack *extack) 993 { 994 struct nsim_bus_dev *nsim_bus_dev = nsim_dev->nsim_bus_dev; 995 struct devlink *devlink; 996 int err; 997 998 devlink = priv_to_devlink(nsim_dev); 999 nsim_dev = devlink_priv(devlink); 1000 INIT_LIST_HEAD(&nsim_dev->port_list); 1001 mutex_init(&nsim_dev->port_list_lock); 1002 nsim_dev->fw_update_status = true; 1003 nsim_dev->fw_update_overwrite_mask = 0; 1004 1005 nsim_dev->fib_data = nsim_fib_create(devlink, extack); 1006 if (IS_ERR(nsim_dev->fib_data)) 1007 return PTR_ERR(nsim_dev->fib_data); 1008 1009 nsim_devlink_param_load_driverinit_values(devlink); 1010 1011 err = nsim_dev_dummy_region_init(nsim_dev, devlink); 1012 if (err) 1013 goto err_fib_destroy; 1014 1015 err = nsim_dev_traps_init(devlink); 1016 if (err) 1017 goto err_dummy_region_exit; 1018 1019 err = nsim_dev_health_init(nsim_dev, devlink); 1020 if (err) 1021 goto err_traps_exit; 1022 1023 err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count); 1024 if (err) 1025 goto err_health_exit; 1026 1027 nsim_dev->take_snapshot = debugfs_create_file("take_snapshot", 1028 0200, 1029 nsim_dev->ddir, 1030 nsim_dev, 1031 &nsim_dev_take_snapshot_fops); 1032 return 0; 1033 1034 err_health_exit: 1035 nsim_dev_health_exit(nsim_dev); 1036 err_traps_exit: 1037 nsim_dev_traps_exit(devlink); 1038 err_dummy_region_exit: 1039 nsim_dev_dummy_region_exit(nsim_dev); 1040 err_fib_destroy: 1041 nsim_fib_destroy(devlink, nsim_dev->fib_data); 1042 return err; 1043 } 1044 1045 int nsim_dev_probe(struct nsim_bus_dev *nsim_bus_dev) 1046 { 1047 struct nsim_dev *nsim_dev; 1048 struct devlink *devlink; 1049 int err; 1050 1051 devlink = devlink_alloc(&nsim_dev_devlink_ops, sizeof(*nsim_dev)); 1052 if (!devlink) 1053 return -ENOMEM; 1054 devlink_net_set(devlink, nsim_bus_dev->initial_net); 1055 nsim_dev = devlink_priv(devlink); 1056 nsim_dev->nsim_bus_dev = nsim_bus_dev; 1057 nsim_dev->switch_id.id_len = sizeof(nsim_dev->switch_id.id); 1058 get_random_bytes(nsim_dev->switch_id.id, nsim_dev->switch_id.id_len); 1059 INIT_LIST_HEAD(&nsim_dev->port_list); 1060 mutex_init(&nsim_dev->port_list_lock); 1061 nsim_dev->fw_update_status = true; 1062 nsim_dev->fw_update_overwrite_mask = 0; 1063 nsim_dev->max_macs = NSIM_DEV_MAX_MACS_DEFAULT; 1064 nsim_dev->test1 = NSIM_DEV_TEST1_DEFAULT; 1065 spin_lock_init(&nsim_dev->fa_cookie_lock); 1066 1067 dev_set_drvdata(&nsim_bus_dev->dev, nsim_dev); 1068 1069 err = nsim_dev_resources_register(devlink); 1070 if (err) 1071 goto err_devlink_free; 1072 1073 nsim_dev->fib_data = nsim_fib_create(devlink, NULL); 1074 if (IS_ERR(nsim_dev->fib_data)) { 1075 err = PTR_ERR(nsim_dev->fib_data); 1076 goto err_resources_unregister; 1077 } 1078 1079 err = devlink_register(devlink, &nsim_bus_dev->dev); 1080 if (err) 1081 goto err_fib_destroy; 1082 1083 err = devlink_params_register(devlink, nsim_devlink_params, 1084 ARRAY_SIZE(nsim_devlink_params)); 1085 if (err) 1086 goto err_dl_unregister; 1087 nsim_devlink_set_params_init_values(nsim_dev, devlink); 1088 1089 err = nsim_dev_dummy_region_init(nsim_dev, devlink); 1090 if (err) 1091 goto err_params_unregister; 1092 1093 err = nsim_dev_traps_init(devlink); 1094 if (err) 1095 goto err_dummy_region_exit; 1096 1097 err = nsim_dev_debugfs_init(nsim_dev); 1098 if (err) 1099 goto err_traps_exit; 1100 1101 err = nsim_dev_health_init(nsim_dev, devlink); 1102 if (err) 1103 goto err_debugfs_exit; 1104 1105 err = nsim_bpf_dev_init(nsim_dev); 1106 if (err) 1107 goto err_health_exit; 1108 1109 err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count); 1110 if (err) 1111 goto err_bpf_dev_exit; 1112 1113 devlink_params_publish(devlink); 1114 devlink_reload_enable(devlink); 1115 return 0; 1116 1117 err_bpf_dev_exit: 1118 nsim_bpf_dev_exit(nsim_dev); 1119 err_health_exit: 1120 nsim_dev_health_exit(nsim_dev); 1121 err_debugfs_exit: 1122 nsim_dev_debugfs_exit(nsim_dev); 1123 err_traps_exit: 1124 nsim_dev_traps_exit(devlink); 1125 err_dummy_region_exit: 1126 nsim_dev_dummy_region_exit(nsim_dev); 1127 err_params_unregister: 1128 devlink_params_unregister(devlink, nsim_devlink_params, 1129 ARRAY_SIZE(nsim_devlink_params)); 1130 err_dl_unregister: 1131 devlink_unregister(devlink); 1132 err_fib_destroy: 1133 nsim_fib_destroy(devlink, nsim_dev->fib_data); 1134 err_resources_unregister: 1135 devlink_resources_unregister(devlink, NULL); 1136 err_devlink_free: 1137 devlink_free(devlink); 1138 return err; 1139 } 1140 1141 static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev) 1142 { 1143 struct devlink *devlink = priv_to_devlink(nsim_dev); 1144 1145 if (devlink_is_reload_failed(devlink)) 1146 return; 1147 debugfs_remove(nsim_dev->take_snapshot); 1148 nsim_dev_port_del_all(nsim_dev); 1149 nsim_dev_health_exit(nsim_dev); 1150 nsim_dev_traps_exit(devlink); 1151 nsim_dev_dummy_region_exit(nsim_dev); 1152 mutex_destroy(&nsim_dev->port_list_lock); 1153 nsim_fib_destroy(devlink, nsim_dev->fib_data); 1154 } 1155 1156 void nsim_dev_remove(struct nsim_bus_dev *nsim_bus_dev) 1157 { 1158 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); 1159 struct devlink *devlink = priv_to_devlink(nsim_dev); 1160 1161 devlink_reload_disable(devlink); 1162 1163 nsim_dev_reload_destroy(nsim_dev); 1164 1165 nsim_bpf_dev_exit(nsim_dev); 1166 nsim_dev_debugfs_exit(nsim_dev); 1167 devlink_params_unregister(devlink, nsim_devlink_params, 1168 ARRAY_SIZE(nsim_devlink_params)); 1169 devlink_unregister(devlink); 1170 devlink_resources_unregister(devlink, NULL); 1171 devlink_free(devlink); 1172 } 1173 1174 static struct nsim_dev_port * 1175 __nsim_dev_port_lookup(struct nsim_dev *nsim_dev, unsigned int port_index) 1176 { 1177 struct nsim_dev_port *nsim_dev_port; 1178 1179 list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list) 1180 if (nsim_dev_port->port_index == port_index) 1181 return nsim_dev_port; 1182 return NULL; 1183 } 1184 1185 int nsim_dev_port_add(struct nsim_bus_dev *nsim_bus_dev, 1186 unsigned int port_index) 1187 { 1188 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); 1189 int err; 1190 1191 mutex_lock(&nsim_dev->port_list_lock); 1192 if (__nsim_dev_port_lookup(nsim_dev, port_index)) 1193 err = -EEXIST; 1194 else 1195 err = __nsim_dev_port_add(nsim_dev, port_index); 1196 mutex_unlock(&nsim_dev->port_list_lock); 1197 return err; 1198 } 1199 1200 int nsim_dev_port_del(struct nsim_bus_dev *nsim_bus_dev, 1201 unsigned int port_index) 1202 { 1203 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); 1204 struct nsim_dev_port *nsim_dev_port; 1205 int err = 0; 1206 1207 mutex_lock(&nsim_dev->port_list_lock); 1208 nsim_dev_port = __nsim_dev_port_lookup(nsim_dev, port_index); 1209 if (!nsim_dev_port) 1210 err = -ENOENT; 1211 else 1212 __nsim_dev_port_del(nsim_dev_port); 1213 mutex_unlock(&nsim_dev->port_list_lock); 1214 return err; 1215 } 1216 1217 int nsim_dev_init(void) 1218 { 1219 nsim_dev_ddir = debugfs_create_dir(DRV_NAME, NULL); 1220 return PTR_ERR_OR_ZERO(nsim_dev_ddir); 1221 } 1222 1223 void nsim_dev_exit(void) 1224 { 1225 debugfs_remove_recursive(nsim_dev_ddir); 1226 } 1227