1/* 2 * Copyright (c) 2018 Cumulus Networks. All rights reserved. 3 * Copyright (c) 2018 David Ahern <dsa@cumulusnetworks.com> 4 * Copyright (c) 2019 Mellanox Technologies. All rights reserved. 5 * 6 * This software is licensed under the GNU General License Version 2, 7 * June 1991 as shown in the file COPYING in the top-level directory of this 8 * source tree. 9 * 10 * THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" 11 * WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, 12 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 13 * FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE 14 * OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME 15 * THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 16 */ 17 18#include <linux/debugfs.h> 19#include <linux/device.h> 20#include <linux/etherdevice.h> 21#include <linux/inet.h> 22#include <linux/jiffies.h> 23#include <linux/kernel.h> 24#include <linux/list.h> 25#include <linux/mutex.h> 26#include <linux/random.h> 27#include <linux/rtnetlink.h> 28#include <linux/workqueue.h> 29#include <net/devlink.h> 30#include <net/ip.h> 31#include <net/flow_offload.h> 32#include <uapi/linux/devlink.h> 33#include <uapi/linux/ip.h> 34#include <uapi/linux/udp.h> 35 36#include "netdevsim.h" 37 38static struct dentry *nsim_dev_ddir; 39 40#define NSIM_DEV_DUMMY_REGION_SIZE (1024 * 32) 41 42static int 43nsim_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 61static 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 95static 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 102static 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 132errout: 133 spin_unlock(&nsim_dev->fa_cookie_lock); 134 return ret; 135} 136 137static 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; 152 153 buf = memdup_user(data, count); 154 if (IS_ERR(buf)) 155 return PTR_ERR(buf); 156 157 fa_cookie = kmalloc(sizeof(*fa_cookie) + cookie_len, 158 GFP_KERNEL | __GFP_NOWARN); 159 if (!fa_cookie) { 160 ret = -ENOMEM; 161 goto free_buf; 162 } 163 164 fa_cookie->cookie_len = cookie_len; 165 ret = hex2bin(fa_cookie->cookie, buf, cookie_len); 166 if (ret) 167 goto free_fa_cookie; 168 kfree(buf); 169 170 spin_lock(&nsim_dev->fa_cookie_lock); 171 kfree(nsim_dev->fa_cookie); 172 nsim_dev->fa_cookie = fa_cookie; 173 spin_unlock(&nsim_dev->fa_cookie_lock); 174 175 return count; 176 177free_fa_cookie: 178 kfree(fa_cookie); 179free_buf: 180 kfree(buf); 181 return ret; 182} 183 184static const struct file_operations nsim_dev_trap_fa_cookie_fops = { 185 .open = simple_open, 186 .read = nsim_dev_trap_fa_cookie_read, 187 .write = nsim_dev_trap_fa_cookie_write, 188 .llseek = generic_file_llseek, 189 .owner = THIS_MODULE, 190}; 191 192static int nsim_dev_debugfs_init(struct nsim_dev *nsim_dev) 193{ 194 char dev_ddir_name[sizeof(DRV_NAME) + 10]; 195 196 sprintf(dev_ddir_name, DRV_NAME "%u", nsim_dev->nsim_bus_dev->dev.id); 197 nsim_dev->ddir = debugfs_create_dir(dev_ddir_name, nsim_dev_ddir); 198 if (IS_ERR(nsim_dev->ddir)) 199 return PTR_ERR(nsim_dev->ddir); 200 nsim_dev->ports_ddir = debugfs_create_dir("ports", nsim_dev->ddir); 201 if (IS_ERR(nsim_dev->ports_ddir)) 202 return PTR_ERR(nsim_dev->ports_ddir); 203 debugfs_create_bool("fw_update_status", 0600, nsim_dev->ddir, 204 &nsim_dev->fw_update_status); 205 debugfs_create_u32("fw_update_overwrite_mask", 0600, nsim_dev->ddir, 206 &nsim_dev->fw_update_overwrite_mask); 207 debugfs_create_u32("max_macs", 0600, nsim_dev->ddir, 208 &nsim_dev->max_macs); 209 debugfs_create_bool("test1", 0600, nsim_dev->ddir, 210 &nsim_dev->test1); 211 nsim_dev->take_snapshot = debugfs_create_file("take_snapshot", 212 0200, 213 nsim_dev->ddir, 214 nsim_dev, 215 &nsim_dev_take_snapshot_fops); 216 debugfs_create_bool("dont_allow_reload", 0600, nsim_dev->ddir, 217 &nsim_dev->dont_allow_reload); 218 debugfs_create_bool("fail_reload", 0600, nsim_dev->ddir, 219 &nsim_dev->fail_reload); 220 debugfs_create_file("trap_flow_action_cookie", 0600, nsim_dev->ddir, 221 nsim_dev, &nsim_dev_trap_fa_cookie_fops); 222 debugfs_create_bool("fail_trap_group_set", 0600, 223 nsim_dev->ddir, 224 &nsim_dev->fail_trap_group_set); 225 debugfs_create_bool("fail_trap_policer_set", 0600, 226 nsim_dev->ddir, 227 &nsim_dev->fail_trap_policer_set); 228 debugfs_create_bool("fail_trap_policer_counter_get", 0600, 229 nsim_dev->ddir, 230 &nsim_dev->fail_trap_policer_counter_get); 231 nsim_udp_tunnels_debugfs_create(nsim_dev); 232 return 0; 233} 234 235static void nsim_dev_debugfs_exit(struct nsim_dev *nsim_dev) 236{ 237 debugfs_remove_recursive(nsim_dev->ports_ddir); 238 debugfs_remove_recursive(nsim_dev->ddir); 239} 240 241static int nsim_dev_port_debugfs_init(struct nsim_dev *nsim_dev, 242 struct nsim_dev_port *nsim_dev_port) 243{ 244 char port_ddir_name[16]; 245 char dev_link_name[32]; 246 247 sprintf(port_ddir_name, "%u", nsim_dev_port->port_index); 248 nsim_dev_port->ddir = debugfs_create_dir(port_ddir_name, 249 nsim_dev->ports_ddir); 250 if (IS_ERR(nsim_dev_port->ddir)) 251 return PTR_ERR(nsim_dev_port->ddir); 252 253 sprintf(dev_link_name, "../../../" DRV_NAME "%u", 254 nsim_dev->nsim_bus_dev->dev.id); 255 debugfs_create_symlink("dev", nsim_dev_port->ddir, dev_link_name); 256 257 return 0; 258} 259 260static void nsim_dev_port_debugfs_exit(struct nsim_dev_port *nsim_dev_port) 261{ 262 debugfs_remove_recursive(nsim_dev_port->ddir); 263} 264 265static int nsim_dev_resources_register(struct devlink *devlink) 266{ 267 struct devlink_resource_size_params params = { 268 .size_max = (u64)-1, 269 .size_granularity = 1, 270 .unit = DEVLINK_RESOURCE_UNIT_ENTRY 271 }; 272 int err; 273 274 /* Resources for IPv4 */ 275 err = devlink_resource_register(devlink, "IPv4", (u64)-1, 276 NSIM_RESOURCE_IPV4, 277 DEVLINK_RESOURCE_ID_PARENT_TOP, 278 ¶ms); 279 if (err) { 280 pr_err("Failed to register IPv4 top resource\n"); 281 goto out; 282 } 283 284 err = devlink_resource_register(devlink, "fib", (u64)-1, 285 NSIM_RESOURCE_IPV4_FIB, 286 NSIM_RESOURCE_IPV4, ¶ms); 287 if (err) { 288 pr_err("Failed to register IPv4 FIB resource\n"); 289 return err; 290 } 291 292 err = devlink_resource_register(devlink, "fib-rules", (u64)-1, 293 NSIM_RESOURCE_IPV4_FIB_RULES, 294 NSIM_RESOURCE_IPV4, ¶ms); 295 if (err) { 296 pr_err("Failed to register IPv4 FIB rules resource\n"); 297 return err; 298 } 299 300 /* Resources for IPv6 */ 301 err = devlink_resource_register(devlink, "IPv6", (u64)-1, 302 NSIM_RESOURCE_IPV6, 303 DEVLINK_RESOURCE_ID_PARENT_TOP, 304 ¶ms); 305 if (err) { 306 pr_err("Failed to register IPv6 top resource\n"); 307 goto out; 308 } 309 310 err = devlink_resource_register(devlink, "fib", (u64)-1, 311 NSIM_RESOURCE_IPV6_FIB, 312 NSIM_RESOURCE_IPV6, ¶ms); 313 if (err) { 314 pr_err("Failed to register IPv6 FIB resource\n"); 315 return err; 316 } 317 318 err = devlink_resource_register(devlink, "fib-rules", (u64)-1, 319 NSIM_RESOURCE_IPV6_FIB_RULES, 320 NSIM_RESOURCE_IPV6, ¶ms); 321 if (err) { 322 pr_err("Failed to register IPv6 FIB rules resource\n"); 323 return err; 324 } 325 326out: 327 return err; 328} 329 330enum nsim_devlink_param_id { 331 NSIM_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX, 332 NSIM_DEVLINK_PARAM_ID_TEST1, 333}; 334 335static const struct devlink_param nsim_devlink_params[] = { 336 DEVLINK_PARAM_GENERIC(MAX_MACS, 337 BIT(DEVLINK_PARAM_CMODE_DRIVERINIT), 338 NULL, NULL, NULL), 339 DEVLINK_PARAM_DRIVER(NSIM_DEVLINK_PARAM_ID_TEST1, 340 "test1", DEVLINK_PARAM_TYPE_BOOL, 341 BIT(DEVLINK_PARAM_CMODE_DRIVERINIT), 342 NULL, NULL, NULL), 343}; 344 345static void nsim_devlink_set_params_init_values(struct nsim_dev *nsim_dev, 346 struct devlink *devlink) 347{ 348 union devlink_param_value value; 349 350 value.vu32 = nsim_dev->max_macs; 351 devlink_param_driverinit_value_set(devlink, 352 DEVLINK_PARAM_GENERIC_ID_MAX_MACS, 353 value); 354 value.vbool = nsim_dev->test1; 355 devlink_param_driverinit_value_set(devlink, 356 NSIM_DEVLINK_PARAM_ID_TEST1, 357 value); 358} 359 360static void nsim_devlink_param_load_driverinit_values(struct devlink *devlink) 361{ 362 struct nsim_dev *nsim_dev = devlink_priv(devlink); 363 union devlink_param_value saved_value; 364 int err; 365 366 err = devlink_param_driverinit_value_get(devlink, 367 DEVLINK_PARAM_GENERIC_ID_MAX_MACS, 368 &saved_value); 369 if (!err) 370 nsim_dev->max_macs = saved_value.vu32; 371 err = devlink_param_driverinit_value_get(devlink, 372 NSIM_DEVLINK_PARAM_ID_TEST1, 373 &saved_value); 374 if (!err) 375 nsim_dev->test1 = saved_value.vbool; 376} 377 378#define NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX 16 379 380static const struct devlink_region_ops dummy_region_ops = { 381 .name = "dummy", 382 .destructor = &kfree, 383 .snapshot = nsim_dev_take_snapshot, 384}; 385 386static int nsim_dev_dummy_region_init(struct nsim_dev *nsim_dev, 387 struct devlink *devlink) 388{ 389 nsim_dev->dummy_region = 390 devlink_region_create(devlink, &dummy_region_ops, 391 NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX, 392 NSIM_DEV_DUMMY_REGION_SIZE); 393 return PTR_ERR_OR_ZERO(nsim_dev->dummy_region); 394} 395 396static void nsim_dev_dummy_region_exit(struct nsim_dev *nsim_dev) 397{ 398 devlink_region_destroy(nsim_dev->dummy_region); 399} 400 401struct nsim_trap_item { 402 void *trap_ctx; 403 enum devlink_trap_action action; 404}; 405 406struct nsim_trap_data { 407 struct delayed_work trap_report_dw; 408 struct nsim_trap_item *trap_items_arr; 409 u64 *trap_policers_cnt_arr; 410 struct nsim_dev *nsim_dev; 411 spinlock_t trap_lock; /* Protects trap_items_arr */ 412}; 413 414/* All driver-specific traps must be documented in 415 * Documentation/networking/devlink/netdevsim.rst 416 */ 417enum { 418 NSIM_TRAP_ID_BASE = DEVLINK_TRAP_GENERIC_ID_MAX, 419 NSIM_TRAP_ID_FID_MISS, 420}; 421 422#define NSIM_TRAP_NAME_FID_MISS "fid_miss" 423 424#define NSIM_TRAP_METADATA DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT 425 426#define NSIM_TRAP_DROP(_id, _group_id) \ 427 DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \ 428 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ 429 NSIM_TRAP_METADATA) 430#define NSIM_TRAP_DROP_EXT(_id, _group_id, _metadata) \ 431 DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \ 432 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ 433 NSIM_TRAP_METADATA | (_metadata)) 434#define NSIM_TRAP_EXCEPTION(_id, _group_id) \ 435 DEVLINK_TRAP_GENERIC(EXCEPTION, TRAP, _id, \ 436 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ 437 NSIM_TRAP_METADATA) 438#define NSIM_TRAP_CONTROL(_id, _group_id, _action) \ 439 DEVLINK_TRAP_GENERIC(CONTROL, _action, _id, \ 440 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ 441 NSIM_TRAP_METADATA) 442#define NSIM_TRAP_DRIVER_EXCEPTION(_id, _group_id) \ 443 DEVLINK_TRAP_DRIVER(EXCEPTION, TRAP, NSIM_TRAP_ID_##_id, \ 444 NSIM_TRAP_NAME_##_id, \ 445 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ 446 NSIM_TRAP_METADATA) 447 448#define NSIM_DEV_TRAP_POLICER_MIN_RATE 1 449#define NSIM_DEV_TRAP_POLICER_MAX_RATE 8000 450#define NSIM_DEV_TRAP_POLICER_MIN_BURST 8 451#define NSIM_DEV_TRAP_POLICER_MAX_BURST 65536 452 453#define NSIM_TRAP_POLICER(_id, _rate, _burst) \ 454 DEVLINK_TRAP_POLICER(_id, _rate, _burst, \ 455 NSIM_DEV_TRAP_POLICER_MAX_RATE, \ 456 NSIM_DEV_TRAP_POLICER_MIN_RATE, \ 457 NSIM_DEV_TRAP_POLICER_MAX_BURST, \ 458 NSIM_DEV_TRAP_POLICER_MIN_BURST) 459 460static const struct devlink_trap_policer nsim_trap_policers_arr[] = { 461 NSIM_TRAP_POLICER(1, 1000, 128), 462 NSIM_TRAP_POLICER(2, 2000, 256), 463 NSIM_TRAP_POLICER(3, 3000, 512), 464}; 465 466static const struct devlink_trap_group nsim_trap_groups_arr[] = { 467 DEVLINK_TRAP_GROUP_GENERIC(L2_DROPS, 0), 468 DEVLINK_TRAP_GROUP_GENERIC(L3_DROPS, 1), 469 DEVLINK_TRAP_GROUP_GENERIC(L3_EXCEPTIONS, 1), 470 DEVLINK_TRAP_GROUP_GENERIC(BUFFER_DROPS, 2), 471 DEVLINK_TRAP_GROUP_GENERIC(ACL_DROPS, 3), 472 DEVLINK_TRAP_GROUP_GENERIC(MC_SNOOPING, 3), 473}; 474 475static const struct devlink_trap nsim_traps_arr[] = { 476 NSIM_TRAP_DROP(SMAC_MC, L2_DROPS), 477 NSIM_TRAP_DROP(VLAN_TAG_MISMATCH, L2_DROPS), 478 NSIM_TRAP_DROP(INGRESS_VLAN_FILTER, L2_DROPS), 479 NSIM_TRAP_DROP(INGRESS_STP_FILTER, L2_DROPS), 480 NSIM_TRAP_DROP(EMPTY_TX_LIST, L2_DROPS), 481 NSIM_TRAP_DROP(PORT_LOOPBACK_FILTER, L2_DROPS), 482 NSIM_TRAP_DRIVER_EXCEPTION(FID_MISS, L2_DROPS), 483 NSIM_TRAP_DROP(BLACKHOLE_ROUTE, L3_DROPS), 484 NSIM_TRAP_EXCEPTION(TTL_ERROR, L3_EXCEPTIONS), 485 NSIM_TRAP_DROP(TAIL_DROP, BUFFER_DROPS), 486 NSIM_TRAP_DROP_EXT(INGRESS_FLOW_ACTION_DROP, ACL_DROPS, 487 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE), 488 NSIM_TRAP_DROP_EXT(EGRESS_FLOW_ACTION_DROP, ACL_DROPS, 489 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE), 490 NSIM_TRAP_CONTROL(IGMP_QUERY, MC_SNOOPING, MIRROR), 491 NSIM_TRAP_CONTROL(IGMP_V1_REPORT, MC_SNOOPING, TRAP), 492}; 493 494#define NSIM_TRAP_L4_DATA_LEN 100 495 496static struct sk_buff *nsim_dev_trap_skb_build(void) 497{ 498 int tot_len, data_len = NSIM_TRAP_L4_DATA_LEN; 499 struct sk_buff *skb; 500 struct udphdr *udph; 501 struct ethhdr *eth; 502 struct iphdr *iph; 503 504 skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); 505 if (!skb) 506 return NULL; 507 tot_len = sizeof(struct iphdr) + sizeof(struct udphdr) + data_len; 508 509 skb_reset_mac_header(skb); 510 eth = skb_put(skb, sizeof(struct ethhdr)); 511 eth_random_addr(eth->h_dest); 512 eth_random_addr(eth->h_source); 513 eth->h_proto = htons(ETH_P_IP); 514 skb->protocol = htons(ETH_P_IP); 515 516 skb_set_network_header(skb, skb->len); 517 iph = skb_put(skb, sizeof(struct iphdr)); 518 iph->protocol = IPPROTO_UDP; 519 iph->saddr = in_aton("192.0.2.1"); 520 iph->daddr = in_aton("198.51.100.1"); 521 iph->version = 0x4; 522 iph->frag_off = 0; 523 iph->ihl = 0x5; 524 iph->tot_len = htons(tot_len); 525 iph->ttl = 100; 526 iph->check = 0; 527 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl); 528 529 skb_set_transport_header(skb, skb->len); 530 udph = skb_put_zero(skb, sizeof(struct udphdr) + data_len); 531 get_random_bytes(&udph->source, sizeof(u16)); 532 get_random_bytes(&udph->dest, sizeof(u16)); 533 udph->len = htons(sizeof(struct udphdr) + data_len); 534 535 return skb; 536} 537 538static void nsim_dev_trap_report(struct nsim_dev_port *nsim_dev_port) 539{ 540 struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev; 541 struct devlink *devlink = priv_to_devlink(nsim_dev); 542 struct nsim_trap_data *nsim_trap_data; 543 int i; 544 545 nsim_trap_data = nsim_dev->trap_data; 546 547 spin_lock(&nsim_trap_data->trap_lock); 548 for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) { 549 struct flow_action_cookie *fa_cookie = NULL; 550 struct nsim_trap_item *nsim_trap_item; 551 struct sk_buff *skb; 552 bool has_fa_cookie; 553 554 has_fa_cookie = nsim_traps_arr[i].metadata_cap & 555 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE; 556 557 nsim_trap_item = &nsim_trap_data->trap_items_arr[i]; 558 if (nsim_trap_item->action == DEVLINK_TRAP_ACTION_DROP) 559 continue; 560 561 skb = nsim_dev_trap_skb_build(); 562 if (!skb) 563 continue; 564 skb->dev = nsim_dev_port->ns->netdev; 565 566 /* Trapped packets are usually passed to devlink in softIRQ, 567 * but in this case they are generated in a workqueue. Disable 568 * softIRQs to prevent lockdep from complaining about 569 * "incosistent lock state". 570 */ 571 572 spin_lock_bh(&nsim_dev->fa_cookie_lock); 573 fa_cookie = has_fa_cookie ? nsim_dev->fa_cookie : NULL; 574 devlink_trap_report(devlink, skb, nsim_trap_item->trap_ctx, 575 &nsim_dev_port->devlink_port, fa_cookie); 576 spin_unlock_bh(&nsim_dev->fa_cookie_lock); 577 consume_skb(skb); 578 } 579 spin_unlock(&nsim_trap_data->trap_lock); 580} 581 582#define NSIM_TRAP_REPORT_INTERVAL_MS 100 583 584static void nsim_dev_trap_report_work(struct work_struct *work) 585{ 586 struct nsim_trap_data *nsim_trap_data; 587 struct nsim_dev_port *nsim_dev_port; 588 struct nsim_dev *nsim_dev; 589 590 nsim_trap_data = container_of(work, struct nsim_trap_data, 591 trap_report_dw.work); 592 nsim_dev = nsim_trap_data->nsim_dev; 593 594 /* For each running port and enabled packet trap, generate a UDP 595 * packet with a random 5-tuple and report it. 596 */ 597 mutex_lock(&nsim_dev->port_list_lock); 598 list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list) { 599 if (!netif_running(nsim_dev_port->ns->netdev)) 600 continue; 601 602 nsim_dev_trap_report(nsim_dev_port); 603 } 604 mutex_unlock(&nsim_dev->port_list_lock); 605 606 schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw, 607 msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS)); 608} 609 610static int nsim_dev_traps_init(struct devlink *devlink) 611{ 612 size_t policers_count = ARRAY_SIZE(nsim_trap_policers_arr); 613 struct nsim_dev *nsim_dev = devlink_priv(devlink); 614 struct nsim_trap_data *nsim_trap_data; 615 int err; 616 617 nsim_trap_data = kzalloc(sizeof(*nsim_trap_data), GFP_KERNEL); 618 if (!nsim_trap_data) 619 return -ENOMEM; 620 621 nsim_trap_data->trap_items_arr = kcalloc(ARRAY_SIZE(nsim_traps_arr), 622 sizeof(struct nsim_trap_item), 623 GFP_KERNEL); 624 if (!nsim_trap_data->trap_items_arr) { 625 err = -ENOMEM; 626 goto err_trap_data_free; 627 } 628 629 nsim_trap_data->trap_policers_cnt_arr = kcalloc(policers_count, 630 sizeof(u64), 631 GFP_KERNEL); 632 if (!nsim_trap_data->trap_policers_cnt_arr) { 633 err = -ENOMEM; 634 goto err_trap_items_free; 635 } 636 637 /* The lock is used to protect the action state of the registered 638 * traps. The value is written by user and read in delayed work when 639 * iterating over all the traps. 640 */ 641 spin_lock_init(&nsim_trap_data->trap_lock); 642 nsim_trap_data->nsim_dev = nsim_dev; 643 nsim_dev->trap_data = nsim_trap_data; 644 645 err = devlink_trap_policers_register(devlink, nsim_trap_policers_arr, 646 policers_count); 647 if (err) 648 goto err_trap_policers_cnt_free; 649 650 err = devlink_trap_groups_register(devlink, nsim_trap_groups_arr, 651 ARRAY_SIZE(nsim_trap_groups_arr)); 652 if (err) 653 goto err_trap_policers_unregister; 654 655 err = devlink_traps_register(devlink, nsim_traps_arr, 656 ARRAY_SIZE(nsim_traps_arr), NULL); 657 if (err) 658 goto err_trap_groups_unregister; 659 660 INIT_DELAYED_WORK(&nsim_dev->trap_data->trap_report_dw, 661 nsim_dev_trap_report_work); 662 schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw, 663 msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS)); 664 665 return 0; 666 667err_trap_groups_unregister: 668 devlink_trap_groups_unregister(devlink, nsim_trap_groups_arr, 669 ARRAY_SIZE(nsim_trap_groups_arr)); 670err_trap_policers_unregister: 671 devlink_trap_policers_unregister(devlink, nsim_trap_policers_arr, 672 ARRAY_SIZE(nsim_trap_policers_arr)); 673err_trap_policers_cnt_free: 674 kfree(nsim_trap_data->trap_policers_cnt_arr); 675err_trap_items_free: 676 kfree(nsim_trap_data->trap_items_arr); 677err_trap_data_free: 678 kfree(nsim_trap_data); 679 return err; 680} 681 682static void nsim_dev_traps_exit(struct devlink *devlink) 683{ 684 struct nsim_dev *nsim_dev = devlink_priv(devlink); 685 686 cancel_delayed_work_sync(&nsim_dev->trap_data->trap_report_dw); 687 devlink_traps_unregister(devlink, nsim_traps_arr, 688 ARRAY_SIZE(nsim_traps_arr)); 689 devlink_trap_groups_unregister(devlink, nsim_trap_groups_arr, 690 ARRAY_SIZE(nsim_trap_groups_arr)); 691 devlink_trap_policers_unregister(devlink, nsim_trap_policers_arr, 692 ARRAY_SIZE(nsim_trap_policers_arr)); 693 kfree(nsim_dev->trap_data->trap_policers_cnt_arr); 694 kfree(nsim_dev->trap_data->trap_items_arr); 695 kfree(nsim_dev->trap_data); 696} 697 698static int nsim_dev_reload_create(struct nsim_dev *nsim_dev, 699 struct netlink_ext_ack *extack); 700static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev); 701 702static int nsim_dev_reload_down(struct devlink *devlink, bool netns_change, 703 enum devlink_reload_action action, enum devlink_reload_limit limit, 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 720static int nsim_dev_reload_up(struct devlink *devlink, enum devlink_reload_action action, 721 enum devlink_reload_limit limit, u32 *actions_performed, 722 struct netlink_ext_ack *extack) 723{ 724 struct nsim_dev *nsim_dev = devlink_priv(devlink); 725 726 if (nsim_dev->fail_reload) { 727 /* For testing purposes, user set debugfs fail_reload 728 * value to true. Fail right away. 729 */ 730 NL_SET_ERR_MSG_MOD(extack, "User setup the reload to fail for testing purposes"); 731 return -EINVAL; 732 } 733 734 *actions_performed = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT); 735 return nsim_dev_reload_create(nsim_dev, extack); 736} 737 738static int nsim_dev_info_get(struct devlink *devlink, 739 struct devlink_info_req *req, 740 struct netlink_ext_ack *extack) 741{ 742 return devlink_info_driver_name_put(req, DRV_NAME); 743} 744 745#define NSIM_DEV_FLASH_SIZE 500000 746#define NSIM_DEV_FLASH_CHUNK_SIZE 1000 747#define NSIM_DEV_FLASH_CHUNK_TIME_MS 10 748 749static int nsim_dev_flash_update(struct devlink *devlink, 750 struct devlink_flash_update_params *params, 751 struct netlink_ext_ack *extack) 752{ 753 struct nsim_dev *nsim_dev = devlink_priv(devlink); 754 int i; 755 756 if ((params->overwrite_mask & ~nsim_dev->fw_update_overwrite_mask) != 0) 757 return -EOPNOTSUPP; 758 759 if (nsim_dev->fw_update_status) { 760 devlink_flash_update_begin_notify(devlink); 761 devlink_flash_update_status_notify(devlink, 762 "Preparing to flash", 763 params->component, 0, 0); 764 } 765 766 for (i = 0; i < NSIM_DEV_FLASH_SIZE / NSIM_DEV_FLASH_CHUNK_SIZE; i++) { 767 if (nsim_dev->fw_update_status) 768 devlink_flash_update_status_notify(devlink, "Flashing", 769 params->component, 770 i * NSIM_DEV_FLASH_CHUNK_SIZE, 771 NSIM_DEV_FLASH_SIZE); 772 msleep(NSIM_DEV_FLASH_CHUNK_TIME_MS); 773 } 774 775 if (nsim_dev->fw_update_status) { 776 devlink_flash_update_status_notify(devlink, "Flashing", 777 params->component, 778 NSIM_DEV_FLASH_SIZE, 779 NSIM_DEV_FLASH_SIZE); 780 devlink_flash_update_timeout_notify(devlink, "Flash select", 781 params->component, 81); 782 devlink_flash_update_status_notify(devlink, "Flashing done", 783 params->component, 0, 0); 784 devlink_flash_update_end_notify(devlink); 785 } 786 787 return 0; 788} 789 790static struct nsim_trap_item * 791nsim_dev_trap_item_lookup(struct nsim_dev *nsim_dev, u16 trap_id) 792{ 793 struct nsim_trap_data *nsim_trap_data = nsim_dev->trap_data; 794 int i; 795 796 for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) { 797 if (nsim_traps_arr[i].id == trap_id) 798 return &nsim_trap_data->trap_items_arr[i]; 799 } 800 801 return NULL; 802} 803 804static int nsim_dev_devlink_trap_init(struct devlink *devlink, 805 const struct devlink_trap *trap, 806 void *trap_ctx) 807{ 808 struct nsim_dev *nsim_dev = devlink_priv(devlink); 809 struct nsim_trap_item *nsim_trap_item; 810 811 nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id); 812 if (WARN_ON(!nsim_trap_item)) 813 return -ENOENT; 814 815 nsim_trap_item->trap_ctx = trap_ctx; 816 nsim_trap_item->action = trap->init_action; 817 818 return 0; 819} 820 821static int 822nsim_dev_devlink_trap_action_set(struct devlink *devlink, 823 const struct devlink_trap *trap, 824 enum devlink_trap_action action, 825 struct netlink_ext_ack *extack) 826{ 827 struct nsim_dev *nsim_dev = devlink_priv(devlink); 828 struct nsim_trap_item *nsim_trap_item; 829 830 nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id); 831 if (WARN_ON(!nsim_trap_item)) 832 return -ENOENT; 833 834 spin_lock(&nsim_dev->trap_data->trap_lock); 835 nsim_trap_item->action = action; 836 spin_unlock(&nsim_dev->trap_data->trap_lock); 837 838 return 0; 839} 840 841static int 842nsim_dev_devlink_trap_group_set(struct devlink *devlink, 843 const struct devlink_trap_group *group, 844 const struct devlink_trap_policer *policer, 845 struct netlink_ext_ack *extack) 846{ 847 struct nsim_dev *nsim_dev = devlink_priv(devlink); 848 849 if (nsim_dev->fail_trap_group_set) 850 return -EINVAL; 851 852 return 0; 853} 854 855static int 856nsim_dev_devlink_trap_policer_set(struct devlink *devlink, 857 const struct devlink_trap_policer *policer, 858 u64 rate, u64 burst, 859 struct netlink_ext_ack *extack) 860{ 861 struct nsim_dev *nsim_dev = devlink_priv(devlink); 862 863 if (nsim_dev->fail_trap_policer_set) { 864 NL_SET_ERR_MSG_MOD(extack, "User setup the operation to fail for testing purposes"); 865 return -EINVAL; 866 } 867 868 return 0; 869} 870 871static int 872nsim_dev_devlink_trap_policer_counter_get(struct devlink *devlink, 873 const struct devlink_trap_policer *policer, 874 u64 *p_drops) 875{ 876 struct nsim_dev *nsim_dev = devlink_priv(devlink); 877 u64 *cnt; 878 879 if (nsim_dev->fail_trap_policer_counter_get) 880 return -EINVAL; 881 882 cnt = &nsim_dev->trap_data->trap_policers_cnt_arr[policer->id - 1]; 883 *p_drops = (*cnt)++; 884 885 return 0; 886} 887 888static const struct devlink_ops nsim_dev_devlink_ops = { 889 .supported_flash_update_params = DEVLINK_SUPPORT_FLASH_UPDATE_COMPONENT | 890 DEVLINK_SUPPORT_FLASH_UPDATE_OVERWRITE_MASK, 891 .reload_actions = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT), 892 .reload_down = nsim_dev_reload_down, 893 .reload_up = nsim_dev_reload_up, 894 .info_get = nsim_dev_info_get, 895 .flash_update = nsim_dev_flash_update, 896 .trap_init = nsim_dev_devlink_trap_init, 897 .trap_action_set = nsim_dev_devlink_trap_action_set, 898 .trap_group_set = nsim_dev_devlink_trap_group_set, 899 .trap_policer_set = nsim_dev_devlink_trap_policer_set, 900 .trap_policer_counter_get = nsim_dev_devlink_trap_policer_counter_get, 901}; 902 903#define NSIM_DEV_MAX_MACS_DEFAULT 32 904#define NSIM_DEV_TEST1_DEFAULT true 905 906static int __nsim_dev_port_add(struct nsim_dev *nsim_dev, 907 unsigned int port_index) 908{ 909 struct devlink_port_attrs attrs = {}; 910 struct nsim_dev_port *nsim_dev_port; 911 struct devlink_port *devlink_port; 912 int err; 913 914 nsim_dev_port = kzalloc(sizeof(*nsim_dev_port), GFP_KERNEL); 915 if (!nsim_dev_port) 916 return -ENOMEM; 917 nsim_dev_port->port_index = port_index; 918 919 devlink_port = &nsim_dev_port->devlink_port; 920 attrs.flavour = DEVLINK_PORT_FLAVOUR_PHYSICAL; 921 attrs.phys.port_number = port_index + 1; 922 memcpy(attrs.switch_id.id, nsim_dev->switch_id.id, nsim_dev->switch_id.id_len); 923 attrs.switch_id.id_len = nsim_dev->switch_id.id_len; 924 devlink_port_attrs_set(devlink_port, &attrs); 925 err = devlink_port_register(priv_to_devlink(nsim_dev), devlink_port, 926 port_index); 927 if (err) 928 goto err_port_free; 929 930 err = nsim_dev_port_debugfs_init(nsim_dev, nsim_dev_port); 931 if (err) 932 goto err_dl_port_unregister; 933 934 nsim_dev_port->ns = nsim_create(nsim_dev, nsim_dev_port); 935 if (IS_ERR(nsim_dev_port->ns)) { 936 err = PTR_ERR(nsim_dev_port->ns); 937 goto err_port_debugfs_exit; 938 } 939 940 devlink_port_type_eth_set(devlink_port, nsim_dev_port->ns->netdev); 941 list_add(&nsim_dev_port->list, &nsim_dev->port_list); 942 943 return 0; 944 945err_port_debugfs_exit: 946 nsim_dev_port_debugfs_exit(nsim_dev_port); 947err_dl_port_unregister: 948 devlink_port_unregister(devlink_port); 949err_port_free: 950 kfree(nsim_dev_port); 951 return err; 952} 953 954static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port) 955{ 956 struct devlink_port *devlink_port = &nsim_dev_port->devlink_port; 957 958 list_del(&nsim_dev_port->list); 959 devlink_port_type_clear(devlink_port); 960 nsim_destroy(nsim_dev_port->ns); 961 nsim_dev_port_debugfs_exit(nsim_dev_port); 962 devlink_port_unregister(devlink_port); 963 kfree(nsim_dev_port); 964} 965 966static void nsim_dev_port_del_all(struct nsim_dev *nsim_dev) 967{ 968 struct nsim_dev_port *nsim_dev_port, *tmp; 969 970 mutex_lock(&nsim_dev->port_list_lock); 971 list_for_each_entry_safe(nsim_dev_port, tmp, 972 &nsim_dev->port_list, list) 973 __nsim_dev_port_del(nsim_dev_port); 974 mutex_unlock(&nsim_dev->port_list_lock); 975} 976 977static int nsim_dev_port_add_all(struct nsim_dev *nsim_dev, 978 unsigned int port_count) 979{ 980 int i, err; 981 982 for (i = 0; i < port_count; i++) { 983 err = __nsim_dev_port_add(nsim_dev, i); 984 if (err) 985 goto err_port_del_all; 986 } 987 return 0; 988 989err_port_del_all: 990 nsim_dev_port_del_all(nsim_dev); 991 return err; 992} 993 994static int nsim_dev_reload_create(struct nsim_dev *nsim_dev, 995 struct netlink_ext_ack *extack) 996{ 997 struct nsim_bus_dev *nsim_bus_dev = nsim_dev->nsim_bus_dev; 998 struct devlink *devlink; 999 int err; 1000 1001 devlink = priv_to_devlink(nsim_dev); 1002 nsim_dev = devlink_priv(devlink); 1003 INIT_LIST_HEAD(&nsim_dev->port_list); 1004 mutex_init(&nsim_dev->port_list_lock); 1005 nsim_dev->fw_update_status = true; 1006 nsim_dev->fw_update_overwrite_mask = 0; 1007 1008 nsim_devlink_param_load_driverinit_values(devlink); 1009 1010 err = nsim_dev_dummy_region_init(nsim_dev, devlink); 1011 if (err) 1012 return err; 1013 1014 err = nsim_dev_traps_init(devlink); 1015 if (err) 1016 goto err_dummy_region_exit; 1017 1018 nsim_dev->fib_data = nsim_fib_create(devlink, extack); 1019 if (IS_ERR(nsim_dev->fib_data)) { 1020 err = PTR_ERR(nsim_dev->fib_data); 1021 goto err_traps_exit; 1022 } 1023 1024 err = nsim_dev_health_init(nsim_dev, devlink); 1025 if (err) 1026 goto err_fib_destroy; 1027 1028 err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count); 1029 if (err) 1030 goto err_health_exit; 1031 1032 nsim_dev->take_snapshot = debugfs_create_file("take_snapshot", 1033 0200, 1034 nsim_dev->ddir, 1035 nsim_dev, 1036 &nsim_dev_take_snapshot_fops); 1037 return 0; 1038 1039err_health_exit: 1040 nsim_dev_health_exit(nsim_dev); 1041err_fib_destroy: 1042 nsim_fib_destroy(devlink, nsim_dev->fib_data); 1043err_traps_exit: 1044 nsim_dev_traps_exit(devlink); 1045err_dummy_region_exit: 1046 nsim_dev_dummy_region_exit(nsim_dev); 1047 return err; 1048} 1049 1050int nsim_dev_probe(struct nsim_bus_dev *nsim_bus_dev) 1051{ 1052 struct nsim_dev *nsim_dev; 1053 struct devlink *devlink; 1054 int err; 1055 1056 devlink = devlink_alloc(&nsim_dev_devlink_ops, sizeof(*nsim_dev)); 1057 if (!devlink) 1058 return -ENOMEM; 1059 devlink_net_set(devlink, nsim_bus_dev->initial_net); 1060 nsim_dev = devlink_priv(devlink); 1061 nsim_dev->nsim_bus_dev = nsim_bus_dev; 1062 nsim_dev->switch_id.id_len = sizeof(nsim_dev->switch_id.id); 1063 get_random_bytes(nsim_dev->switch_id.id, nsim_dev->switch_id.id_len); 1064 INIT_LIST_HEAD(&nsim_dev->port_list); 1065 mutex_init(&nsim_dev->port_list_lock); 1066 nsim_dev->fw_update_status = true; 1067 nsim_dev->fw_update_overwrite_mask = 0; 1068 nsim_dev->max_macs = NSIM_DEV_MAX_MACS_DEFAULT; 1069 nsim_dev->test1 = NSIM_DEV_TEST1_DEFAULT; 1070 spin_lock_init(&nsim_dev->fa_cookie_lock); 1071 1072 dev_set_drvdata(&nsim_bus_dev->dev, nsim_dev); 1073 1074 err = nsim_dev_resources_register(devlink); 1075 if (err) 1076 goto err_devlink_free; 1077 1078 err = devlink_register(devlink, &nsim_bus_dev->dev); 1079 if (err) 1080 goto err_resources_unregister; 1081 1082 err = devlink_params_register(devlink, nsim_devlink_params, 1083 ARRAY_SIZE(nsim_devlink_params)); 1084 if (err) 1085 goto err_dl_unregister; 1086 nsim_devlink_set_params_init_values(nsim_dev, devlink); 1087 1088 err = nsim_dev_dummy_region_init(nsim_dev, devlink); 1089 if (err) 1090 goto err_params_unregister; 1091 1092 err = nsim_dev_traps_init(devlink); 1093 if (err) 1094 goto err_dummy_region_exit; 1095 1096 err = nsim_dev_debugfs_init(nsim_dev); 1097 if (err) 1098 goto err_traps_exit; 1099 1100 nsim_dev->fib_data = nsim_fib_create(devlink, NULL); 1101 if (IS_ERR(nsim_dev->fib_data)) { 1102 err = PTR_ERR(nsim_dev->fib_data); 1103 goto err_debugfs_exit; 1104 } 1105 1106 err = nsim_dev_health_init(nsim_dev, devlink); 1107 if (err) 1108 goto err_fib_destroy; 1109 1110 err = nsim_bpf_dev_init(nsim_dev); 1111 if (err) 1112 goto err_health_exit; 1113 1114 err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count); 1115 if (err) 1116 goto err_bpf_dev_exit; 1117 1118 devlink_params_publish(devlink); 1119 devlink_reload_enable(devlink); 1120 return 0; 1121 1122err_bpf_dev_exit: 1123 nsim_bpf_dev_exit(nsim_dev); 1124err_health_exit: 1125 nsim_dev_health_exit(nsim_dev); 1126err_fib_destroy: 1127 nsim_fib_destroy(devlink, nsim_dev->fib_data); 1128err_debugfs_exit: 1129 nsim_dev_debugfs_exit(nsim_dev); 1130err_traps_exit: 1131 nsim_dev_traps_exit(devlink); 1132err_dummy_region_exit: 1133 nsim_dev_dummy_region_exit(nsim_dev); 1134err_params_unregister: 1135 devlink_params_unregister(devlink, nsim_devlink_params, 1136 ARRAY_SIZE(nsim_devlink_params)); 1137err_dl_unregister: 1138 devlink_unregister(devlink); 1139err_resources_unregister: 1140 devlink_resources_unregister(devlink, NULL); 1141err_devlink_free: 1142 devlink_free(devlink); 1143 return err; 1144} 1145 1146static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev) 1147{ 1148 struct devlink *devlink = priv_to_devlink(nsim_dev); 1149 1150 if (devlink_is_reload_failed(devlink)) 1151 return; 1152 debugfs_remove(nsim_dev->take_snapshot); 1153 nsim_dev_port_del_all(nsim_dev); 1154 nsim_dev_health_exit(nsim_dev); 1155 nsim_fib_destroy(devlink, nsim_dev->fib_data); 1156 nsim_dev_traps_exit(devlink); 1157 nsim_dev_dummy_region_exit(nsim_dev); 1158 mutex_destroy(&nsim_dev->port_list_lock); 1159} 1160 1161void nsim_dev_remove(struct nsim_bus_dev *nsim_bus_dev) 1162{ 1163 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); 1164 struct devlink *devlink = priv_to_devlink(nsim_dev); 1165 1166 devlink_reload_disable(devlink); 1167 1168 nsim_dev_reload_destroy(nsim_dev); 1169 1170 nsim_bpf_dev_exit(nsim_dev); 1171 nsim_dev_debugfs_exit(nsim_dev); 1172 devlink_params_unregister(devlink, nsim_devlink_params, 1173 ARRAY_SIZE(nsim_devlink_params)); 1174 devlink_unregister(devlink); 1175 devlink_resources_unregister(devlink, NULL); 1176 devlink_free(devlink); 1177} 1178 1179static struct nsim_dev_port * 1180__nsim_dev_port_lookup(struct nsim_dev *nsim_dev, unsigned int port_index) 1181{ 1182 struct nsim_dev_port *nsim_dev_port; 1183 1184 list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list) 1185 if (nsim_dev_port->port_index == port_index) 1186 return nsim_dev_port; 1187 return NULL; 1188} 1189 1190int nsim_dev_port_add(struct nsim_bus_dev *nsim_bus_dev, 1191 unsigned int port_index) 1192{ 1193 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); 1194 int err; 1195 1196 mutex_lock(&nsim_dev->port_list_lock); 1197 if (__nsim_dev_port_lookup(nsim_dev, port_index)) 1198 err = -EEXIST; 1199 else 1200 err = __nsim_dev_port_add(nsim_dev, port_index); 1201 mutex_unlock(&nsim_dev->port_list_lock); 1202 return err; 1203} 1204 1205int nsim_dev_port_del(struct nsim_bus_dev *nsim_bus_dev, 1206 unsigned int port_index) 1207{ 1208 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); 1209 struct nsim_dev_port *nsim_dev_port; 1210 int err = 0; 1211 1212 mutex_lock(&nsim_dev->port_list_lock); 1213 nsim_dev_port = __nsim_dev_port_lookup(nsim_dev, port_index); 1214 if (!nsim_dev_port) 1215 err = -ENOENT; 1216 else 1217 __nsim_dev_port_del(nsim_dev_port); 1218 mutex_unlock(&nsim_dev->port_list_lock); 1219 return err; 1220} 1221 1222int nsim_dev_init(void) 1223{ 1224 nsim_dev_ddir = debugfs_create_dir(DRV_NAME, NULL); 1225 return PTR_ERR_OR_ZERO(nsim_dev_ddir); 1226} 1227 1228void nsim_dev_exit(void) 1229{ 1230 debugfs_remove_recursive(nsim_dev_ddir); 1231} 1232