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 /* Resources for nexthops */ 330 err = devlink_resource_register(devlink, "nexthops", (u64)-1, 331 NSIM_RESOURCE_NEXTHOPS, 332 DEVLINK_RESOURCE_ID_PARENT_TOP, 333 ¶ms); 334 335 out: 336 return err; 337 } 338 339 enum nsim_devlink_param_id { 340 NSIM_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX, 341 NSIM_DEVLINK_PARAM_ID_TEST1, 342 }; 343 344 static const struct devlink_param nsim_devlink_params[] = { 345 DEVLINK_PARAM_GENERIC(MAX_MACS, 346 BIT(DEVLINK_PARAM_CMODE_DRIVERINIT), 347 NULL, NULL, NULL), 348 DEVLINK_PARAM_DRIVER(NSIM_DEVLINK_PARAM_ID_TEST1, 349 "test1", DEVLINK_PARAM_TYPE_BOOL, 350 BIT(DEVLINK_PARAM_CMODE_DRIVERINIT), 351 NULL, NULL, NULL), 352 }; 353 354 static void nsim_devlink_set_params_init_values(struct nsim_dev *nsim_dev, 355 struct devlink *devlink) 356 { 357 union devlink_param_value value; 358 359 value.vu32 = nsim_dev->max_macs; 360 devlink_param_driverinit_value_set(devlink, 361 DEVLINK_PARAM_GENERIC_ID_MAX_MACS, 362 value); 363 value.vbool = nsim_dev->test1; 364 devlink_param_driverinit_value_set(devlink, 365 NSIM_DEVLINK_PARAM_ID_TEST1, 366 value); 367 } 368 369 static void nsim_devlink_param_load_driverinit_values(struct devlink *devlink) 370 { 371 struct nsim_dev *nsim_dev = devlink_priv(devlink); 372 union devlink_param_value saved_value; 373 int err; 374 375 err = devlink_param_driverinit_value_get(devlink, 376 DEVLINK_PARAM_GENERIC_ID_MAX_MACS, 377 &saved_value); 378 if (!err) 379 nsim_dev->max_macs = saved_value.vu32; 380 err = devlink_param_driverinit_value_get(devlink, 381 NSIM_DEVLINK_PARAM_ID_TEST1, 382 &saved_value); 383 if (!err) 384 nsim_dev->test1 = saved_value.vbool; 385 } 386 387 #define NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX 16 388 389 static const struct devlink_region_ops dummy_region_ops = { 390 .name = "dummy", 391 .destructor = &kfree, 392 .snapshot = nsim_dev_take_snapshot, 393 }; 394 395 static int nsim_dev_dummy_region_init(struct nsim_dev *nsim_dev, 396 struct devlink *devlink) 397 { 398 nsim_dev->dummy_region = 399 devlink_region_create(devlink, &dummy_region_ops, 400 NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX, 401 NSIM_DEV_DUMMY_REGION_SIZE); 402 return PTR_ERR_OR_ZERO(nsim_dev->dummy_region); 403 } 404 405 static void nsim_dev_dummy_region_exit(struct nsim_dev *nsim_dev) 406 { 407 devlink_region_destroy(nsim_dev->dummy_region); 408 } 409 410 struct nsim_trap_item { 411 void *trap_ctx; 412 enum devlink_trap_action action; 413 }; 414 415 struct nsim_trap_data { 416 struct delayed_work trap_report_dw; 417 struct nsim_trap_item *trap_items_arr; 418 u64 *trap_policers_cnt_arr; 419 struct nsim_dev *nsim_dev; 420 spinlock_t trap_lock; /* Protects trap_items_arr */ 421 }; 422 423 /* All driver-specific traps must be documented in 424 * Documentation/networking/devlink/netdevsim.rst 425 */ 426 enum { 427 NSIM_TRAP_ID_BASE = DEVLINK_TRAP_GENERIC_ID_MAX, 428 NSIM_TRAP_ID_FID_MISS, 429 }; 430 431 #define NSIM_TRAP_NAME_FID_MISS "fid_miss" 432 433 #define NSIM_TRAP_METADATA DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT 434 435 #define NSIM_TRAP_DROP(_id, _group_id) \ 436 DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \ 437 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ 438 NSIM_TRAP_METADATA) 439 #define NSIM_TRAP_DROP_EXT(_id, _group_id, _metadata) \ 440 DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \ 441 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ 442 NSIM_TRAP_METADATA | (_metadata)) 443 #define NSIM_TRAP_EXCEPTION(_id, _group_id) \ 444 DEVLINK_TRAP_GENERIC(EXCEPTION, TRAP, _id, \ 445 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ 446 NSIM_TRAP_METADATA) 447 #define NSIM_TRAP_CONTROL(_id, _group_id, _action) \ 448 DEVLINK_TRAP_GENERIC(CONTROL, _action, _id, \ 449 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ 450 NSIM_TRAP_METADATA) 451 #define NSIM_TRAP_DRIVER_EXCEPTION(_id, _group_id) \ 452 DEVLINK_TRAP_DRIVER(EXCEPTION, TRAP, NSIM_TRAP_ID_##_id, \ 453 NSIM_TRAP_NAME_##_id, \ 454 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ 455 NSIM_TRAP_METADATA) 456 457 #define NSIM_DEV_TRAP_POLICER_MIN_RATE 1 458 #define NSIM_DEV_TRAP_POLICER_MAX_RATE 8000 459 #define NSIM_DEV_TRAP_POLICER_MIN_BURST 8 460 #define NSIM_DEV_TRAP_POLICER_MAX_BURST 65536 461 462 #define NSIM_TRAP_POLICER(_id, _rate, _burst) \ 463 DEVLINK_TRAP_POLICER(_id, _rate, _burst, \ 464 NSIM_DEV_TRAP_POLICER_MAX_RATE, \ 465 NSIM_DEV_TRAP_POLICER_MIN_RATE, \ 466 NSIM_DEV_TRAP_POLICER_MAX_BURST, \ 467 NSIM_DEV_TRAP_POLICER_MIN_BURST) 468 469 static const struct devlink_trap_policer nsim_trap_policers_arr[] = { 470 NSIM_TRAP_POLICER(1, 1000, 128), 471 NSIM_TRAP_POLICER(2, 2000, 256), 472 NSIM_TRAP_POLICER(3, 3000, 512), 473 }; 474 475 static const struct devlink_trap_group nsim_trap_groups_arr[] = { 476 DEVLINK_TRAP_GROUP_GENERIC(L2_DROPS, 0), 477 DEVLINK_TRAP_GROUP_GENERIC(L3_DROPS, 1), 478 DEVLINK_TRAP_GROUP_GENERIC(L3_EXCEPTIONS, 1), 479 DEVLINK_TRAP_GROUP_GENERIC(BUFFER_DROPS, 2), 480 DEVLINK_TRAP_GROUP_GENERIC(ACL_DROPS, 3), 481 DEVLINK_TRAP_GROUP_GENERIC(MC_SNOOPING, 3), 482 }; 483 484 static const struct devlink_trap nsim_traps_arr[] = { 485 NSIM_TRAP_DROP(SMAC_MC, L2_DROPS), 486 NSIM_TRAP_DROP(VLAN_TAG_MISMATCH, L2_DROPS), 487 NSIM_TRAP_DROP(INGRESS_VLAN_FILTER, L2_DROPS), 488 NSIM_TRAP_DROP(INGRESS_STP_FILTER, L2_DROPS), 489 NSIM_TRAP_DROP(EMPTY_TX_LIST, L2_DROPS), 490 NSIM_TRAP_DROP(PORT_LOOPBACK_FILTER, L2_DROPS), 491 NSIM_TRAP_DRIVER_EXCEPTION(FID_MISS, L2_DROPS), 492 NSIM_TRAP_DROP(BLACKHOLE_ROUTE, L3_DROPS), 493 NSIM_TRAP_EXCEPTION(TTL_ERROR, L3_EXCEPTIONS), 494 NSIM_TRAP_DROP(TAIL_DROP, BUFFER_DROPS), 495 NSIM_TRAP_DROP_EXT(INGRESS_FLOW_ACTION_DROP, ACL_DROPS, 496 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE), 497 NSIM_TRAP_DROP_EXT(EGRESS_FLOW_ACTION_DROP, ACL_DROPS, 498 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE), 499 NSIM_TRAP_CONTROL(IGMP_QUERY, MC_SNOOPING, MIRROR), 500 NSIM_TRAP_CONTROL(IGMP_V1_REPORT, MC_SNOOPING, TRAP), 501 }; 502 503 #define NSIM_TRAP_L4_DATA_LEN 100 504 505 static struct sk_buff *nsim_dev_trap_skb_build(void) 506 { 507 int tot_len, data_len = NSIM_TRAP_L4_DATA_LEN; 508 struct sk_buff *skb; 509 struct udphdr *udph; 510 struct ethhdr *eth; 511 struct iphdr *iph; 512 513 skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); 514 if (!skb) 515 return NULL; 516 tot_len = sizeof(struct iphdr) + sizeof(struct udphdr) + data_len; 517 518 skb_reset_mac_header(skb); 519 eth = skb_put(skb, sizeof(struct ethhdr)); 520 eth_random_addr(eth->h_dest); 521 eth_random_addr(eth->h_source); 522 eth->h_proto = htons(ETH_P_IP); 523 skb->protocol = htons(ETH_P_IP); 524 525 skb_set_network_header(skb, skb->len); 526 iph = skb_put(skb, sizeof(struct iphdr)); 527 iph->protocol = IPPROTO_UDP; 528 iph->saddr = in_aton("192.0.2.1"); 529 iph->daddr = in_aton("198.51.100.1"); 530 iph->version = 0x4; 531 iph->frag_off = 0; 532 iph->ihl = 0x5; 533 iph->tot_len = htons(tot_len); 534 iph->ttl = 100; 535 iph->check = 0; 536 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl); 537 538 skb_set_transport_header(skb, skb->len); 539 udph = skb_put_zero(skb, sizeof(struct udphdr) + data_len); 540 get_random_bytes(&udph->source, sizeof(u16)); 541 get_random_bytes(&udph->dest, sizeof(u16)); 542 udph->len = htons(sizeof(struct udphdr) + data_len); 543 544 return skb; 545 } 546 547 static void nsim_dev_trap_report(struct nsim_dev_port *nsim_dev_port) 548 { 549 struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev; 550 struct devlink *devlink = priv_to_devlink(nsim_dev); 551 struct nsim_trap_data *nsim_trap_data; 552 int i; 553 554 nsim_trap_data = nsim_dev->trap_data; 555 556 spin_lock(&nsim_trap_data->trap_lock); 557 for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) { 558 struct flow_action_cookie *fa_cookie = NULL; 559 struct nsim_trap_item *nsim_trap_item; 560 struct sk_buff *skb; 561 bool has_fa_cookie; 562 563 has_fa_cookie = nsim_traps_arr[i].metadata_cap & 564 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE; 565 566 nsim_trap_item = &nsim_trap_data->trap_items_arr[i]; 567 if (nsim_trap_item->action == DEVLINK_TRAP_ACTION_DROP) 568 continue; 569 570 skb = nsim_dev_trap_skb_build(); 571 if (!skb) 572 continue; 573 skb->dev = nsim_dev_port->ns->netdev; 574 575 /* Trapped packets are usually passed to devlink in softIRQ, 576 * but in this case they are generated in a workqueue. Disable 577 * softIRQs to prevent lockdep from complaining about 578 * "incosistent lock state". 579 */ 580 581 spin_lock_bh(&nsim_dev->fa_cookie_lock); 582 fa_cookie = has_fa_cookie ? nsim_dev->fa_cookie : NULL; 583 devlink_trap_report(devlink, skb, nsim_trap_item->trap_ctx, 584 &nsim_dev_port->devlink_port, fa_cookie); 585 spin_unlock_bh(&nsim_dev->fa_cookie_lock); 586 consume_skb(skb); 587 } 588 spin_unlock(&nsim_trap_data->trap_lock); 589 } 590 591 #define NSIM_TRAP_REPORT_INTERVAL_MS 100 592 593 static void nsim_dev_trap_report_work(struct work_struct *work) 594 { 595 struct nsim_trap_data *nsim_trap_data; 596 struct nsim_dev_port *nsim_dev_port; 597 struct nsim_dev *nsim_dev; 598 599 nsim_trap_data = container_of(work, struct nsim_trap_data, 600 trap_report_dw.work); 601 nsim_dev = nsim_trap_data->nsim_dev; 602 603 /* For each running port and enabled packet trap, generate a UDP 604 * packet with a random 5-tuple and report it. 605 */ 606 mutex_lock(&nsim_dev->port_list_lock); 607 list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list) { 608 if (!netif_running(nsim_dev_port->ns->netdev)) 609 continue; 610 611 nsim_dev_trap_report(nsim_dev_port); 612 } 613 mutex_unlock(&nsim_dev->port_list_lock); 614 615 schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw, 616 msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS)); 617 } 618 619 static int nsim_dev_traps_init(struct devlink *devlink) 620 { 621 size_t policers_count = ARRAY_SIZE(nsim_trap_policers_arr); 622 struct nsim_dev *nsim_dev = devlink_priv(devlink); 623 struct nsim_trap_data *nsim_trap_data; 624 int err; 625 626 nsim_trap_data = kzalloc(sizeof(*nsim_trap_data), GFP_KERNEL); 627 if (!nsim_trap_data) 628 return -ENOMEM; 629 630 nsim_trap_data->trap_items_arr = kcalloc(ARRAY_SIZE(nsim_traps_arr), 631 sizeof(struct nsim_trap_item), 632 GFP_KERNEL); 633 if (!nsim_trap_data->trap_items_arr) { 634 err = -ENOMEM; 635 goto err_trap_data_free; 636 } 637 638 nsim_trap_data->trap_policers_cnt_arr = kcalloc(policers_count, 639 sizeof(u64), 640 GFP_KERNEL); 641 if (!nsim_trap_data->trap_policers_cnt_arr) { 642 err = -ENOMEM; 643 goto err_trap_items_free; 644 } 645 646 /* The lock is used to protect the action state of the registered 647 * traps. The value is written by user and read in delayed work when 648 * iterating over all the traps. 649 */ 650 spin_lock_init(&nsim_trap_data->trap_lock); 651 nsim_trap_data->nsim_dev = nsim_dev; 652 nsim_dev->trap_data = nsim_trap_data; 653 654 err = devlink_trap_policers_register(devlink, nsim_trap_policers_arr, 655 policers_count); 656 if (err) 657 goto err_trap_policers_cnt_free; 658 659 err = devlink_trap_groups_register(devlink, nsim_trap_groups_arr, 660 ARRAY_SIZE(nsim_trap_groups_arr)); 661 if (err) 662 goto err_trap_policers_unregister; 663 664 err = devlink_traps_register(devlink, nsim_traps_arr, 665 ARRAY_SIZE(nsim_traps_arr), NULL); 666 if (err) 667 goto err_trap_groups_unregister; 668 669 INIT_DELAYED_WORK(&nsim_dev->trap_data->trap_report_dw, 670 nsim_dev_trap_report_work); 671 schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw, 672 msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS)); 673 674 return 0; 675 676 err_trap_groups_unregister: 677 devlink_trap_groups_unregister(devlink, nsim_trap_groups_arr, 678 ARRAY_SIZE(nsim_trap_groups_arr)); 679 err_trap_policers_unregister: 680 devlink_trap_policers_unregister(devlink, nsim_trap_policers_arr, 681 ARRAY_SIZE(nsim_trap_policers_arr)); 682 err_trap_policers_cnt_free: 683 kfree(nsim_trap_data->trap_policers_cnt_arr); 684 err_trap_items_free: 685 kfree(nsim_trap_data->trap_items_arr); 686 err_trap_data_free: 687 kfree(nsim_trap_data); 688 return err; 689 } 690 691 static void nsim_dev_traps_exit(struct devlink *devlink) 692 { 693 struct nsim_dev *nsim_dev = devlink_priv(devlink); 694 695 cancel_delayed_work_sync(&nsim_dev->trap_data->trap_report_dw); 696 devlink_traps_unregister(devlink, nsim_traps_arr, 697 ARRAY_SIZE(nsim_traps_arr)); 698 devlink_trap_groups_unregister(devlink, nsim_trap_groups_arr, 699 ARRAY_SIZE(nsim_trap_groups_arr)); 700 devlink_trap_policers_unregister(devlink, nsim_trap_policers_arr, 701 ARRAY_SIZE(nsim_trap_policers_arr)); 702 kfree(nsim_dev->trap_data->trap_policers_cnt_arr); 703 kfree(nsim_dev->trap_data->trap_items_arr); 704 kfree(nsim_dev->trap_data); 705 } 706 707 static int nsim_dev_reload_create(struct nsim_dev *nsim_dev, 708 struct netlink_ext_ack *extack); 709 static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev); 710 711 static int nsim_dev_reload_down(struct devlink *devlink, bool netns_change, 712 enum devlink_reload_action action, enum devlink_reload_limit limit, 713 struct netlink_ext_ack *extack) 714 { 715 struct nsim_dev *nsim_dev = devlink_priv(devlink); 716 717 if (nsim_dev->dont_allow_reload) { 718 /* For testing purposes, user set debugfs dont_allow_reload 719 * value to true. So forbid it. 720 */ 721 NL_SET_ERR_MSG_MOD(extack, "User forbid the reload for testing purposes"); 722 return -EOPNOTSUPP; 723 } 724 725 nsim_dev_reload_destroy(nsim_dev); 726 return 0; 727 } 728 729 static int nsim_dev_reload_up(struct devlink *devlink, enum devlink_reload_action action, 730 enum devlink_reload_limit limit, u32 *actions_performed, 731 struct netlink_ext_ack *extack) 732 { 733 struct nsim_dev *nsim_dev = devlink_priv(devlink); 734 735 if (nsim_dev->fail_reload) { 736 /* For testing purposes, user set debugfs fail_reload 737 * value to true. Fail right away. 738 */ 739 NL_SET_ERR_MSG_MOD(extack, "User setup the reload to fail for testing purposes"); 740 return -EINVAL; 741 } 742 743 *actions_performed = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT); 744 return nsim_dev_reload_create(nsim_dev, extack); 745 } 746 747 static int nsim_dev_info_get(struct devlink *devlink, 748 struct devlink_info_req *req, 749 struct netlink_ext_ack *extack) 750 { 751 return devlink_info_driver_name_put(req, DRV_NAME); 752 } 753 754 #define NSIM_DEV_FLASH_SIZE 500000 755 #define NSIM_DEV_FLASH_CHUNK_SIZE 1000 756 #define NSIM_DEV_FLASH_CHUNK_TIME_MS 10 757 758 static int nsim_dev_flash_update(struct devlink *devlink, 759 struct devlink_flash_update_params *params, 760 struct netlink_ext_ack *extack) 761 { 762 struct nsim_dev *nsim_dev = devlink_priv(devlink); 763 int i; 764 765 if ((params->overwrite_mask & ~nsim_dev->fw_update_overwrite_mask) != 0) 766 return -EOPNOTSUPP; 767 768 if (nsim_dev->fw_update_status) { 769 devlink_flash_update_status_notify(devlink, 770 "Preparing to flash", 771 params->component, 0, 0); 772 } 773 774 for (i = 0; i < NSIM_DEV_FLASH_SIZE / NSIM_DEV_FLASH_CHUNK_SIZE; i++) { 775 if (nsim_dev->fw_update_status) 776 devlink_flash_update_status_notify(devlink, "Flashing", 777 params->component, 778 i * NSIM_DEV_FLASH_CHUNK_SIZE, 779 NSIM_DEV_FLASH_SIZE); 780 msleep(NSIM_DEV_FLASH_CHUNK_TIME_MS); 781 } 782 783 if (nsim_dev->fw_update_status) { 784 devlink_flash_update_status_notify(devlink, "Flashing", 785 params->component, 786 NSIM_DEV_FLASH_SIZE, 787 NSIM_DEV_FLASH_SIZE); 788 devlink_flash_update_timeout_notify(devlink, "Flash select", 789 params->component, 81); 790 devlink_flash_update_status_notify(devlink, "Flashing done", 791 params->component, 0, 0); 792 } 793 794 return 0; 795 } 796 797 static struct nsim_trap_item * 798 nsim_dev_trap_item_lookup(struct nsim_dev *nsim_dev, u16 trap_id) 799 { 800 struct nsim_trap_data *nsim_trap_data = nsim_dev->trap_data; 801 int i; 802 803 for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) { 804 if (nsim_traps_arr[i].id == trap_id) 805 return &nsim_trap_data->trap_items_arr[i]; 806 } 807 808 return NULL; 809 } 810 811 static int nsim_dev_devlink_trap_init(struct devlink *devlink, 812 const struct devlink_trap *trap, 813 void *trap_ctx) 814 { 815 struct nsim_dev *nsim_dev = devlink_priv(devlink); 816 struct nsim_trap_item *nsim_trap_item; 817 818 nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id); 819 if (WARN_ON(!nsim_trap_item)) 820 return -ENOENT; 821 822 nsim_trap_item->trap_ctx = trap_ctx; 823 nsim_trap_item->action = trap->init_action; 824 825 return 0; 826 } 827 828 static int 829 nsim_dev_devlink_trap_action_set(struct devlink *devlink, 830 const struct devlink_trap *trap, 831 enum devlink_trap_action action, 832 struct netlink_ext_ack *extack) 833 { 834 struct nsim_dev *nsim_dev = devlink_priv(devlink); 835 struct nsim_trap_item *nsim_trap_item; 836 837 nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id); 838 if (WARN_ON(!nsim_trap_item)) 839 return -ENOENT; 840 841 spin_lock(&nsim_dev->trap_data->trap_lock); 842 nsim_trap_item->action = action; 843 spin_unlock(&nsim_dev->trap_data->trap_lock); 844 845 return 0; 846 } 847 848 static int 849 nsim_dev_devlink_trap_group_set(struct devlink *devlink, 850 const struct devlink_trap_group *group, 851 const struct devlink_trap_policer *policer, 852 struct netlink_ext_ack *extack) 853 { 854 struct nsim_dev *nsim_dev = devlink_priv(devlink); 855 856 if (nsim_dev->fail_trap_group_set) 857 return -EINVAL; 858 859 return 0; 860 } 861 862 static int 863 nsim_dev_devlink_trap_policer_set(struct devlink *devlink, 864 const struct devlink_trap_policer *policer, 865 u64 rate, u64 burst, 866 struct netlink_ext_ack *extack) 867 { 868 struct nsim_dev *nsim_dev = devlink_priv(devlink); 869 870 if (nsim_dev->fail_trap_policer_set) { 871 NL_SET_ERR_MSG_MOD(extack, "User setup the operation to fail for testing purposes"); 872 return -EINVAL; 873 } 874 875 return 0; 876 } 877 878 static int 879 nsim_dev_devlink_trap_policer_counter_get(struct devlink *devlink, 880 const struct devlink_trap_policer *policer, 881 u64 *p_drops) 882 { 883 struct nsim_dev *nsim_dev = devlink_priv(devlink); 884 u64 *cnt; 885 886 if (nsim_dev->fail_trap_policer_counter_get) 887 return -EINVAL; 888 889 cnt = &nsim_dev->trap_data->trap_policers_cnt_arr[policer->id - 1]; 890 *p_drops = (*cnt)++; 891 892 return 0; 893 } 894 895 static const struct devlink_ops nsim_dev_devlink_ops = { 896 .supported_flash_update_params = DEVLINK_SUPPORT_FLASH_UPDATE_COMPONENT | 897 DEVLINK_SUPPORT_FLASH_UPDATE_OVERWRITE_MASK, 898 .reload_actions = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT), 899 .reload_down = nsim_dev_reload_down, 900 .reload_up = nsim_dev_reload_up, 901 .info_get = nsim_dev_info_get, 902 .flash_update = nsim_dev_flash_update, 903 .trap_init = nsim_dev_devlink_trap_init, 904 .trap_action_set = nsim_dev_devlink_trap_action_set, 905 .trap_group_set = nsim_dev_devlink_trap_group_set, 906 .trap_policer_set = nsim_dev_devlink_trap_policer_set, 907 .trap_policer_counter_get = nsim_dev_devlink_trap_policer_counter_get, 908 }; 909 910 #define NSIM_DEV_MAX_MACS_DEFAULT 32 911 #define NSIM_DEV_TEST1_DEFAULT true 912 913 static int __nsim_dev_port_add(struct nsim_dev *nsim_dev, 914 unsigned int port_index) 915 { 916 struct devlink_port_attrs attrs = {}; 917 struct nsim_dev_port *nsim_dev_port; 918 struct devlink_port *devlink_port; 919 int err; 920 921 nsim_dev_port = kzalloc(sizeof(*nsim_dev_port), GFP_KERNEL); 922 if (!nsim_dev_port) 923 return -ENOMEM; 924 nsim_dev_port->port_index = port_index; 925 926 devlink_port = &nsim_dev_port->devlink_port; 927 attrs.flavour = DEVLINK_PORT_FLAVOUR_PHYSICAL; 928 attrs.phys.port_number = port_index + 1; 929 memcpy(attrs.switch_id.id, nsim_dev->switch_id.id, nsim_dev->switch_id.id_len); 930 attrs.switch_id.id_len = nsim_dev->switch_id.id_len; 931 devlink_port_attrs_set(devlink_port, &attrs); 932 err = devlink_port_register(priv_to_devlink(nsim_dev), devlink_port, 933 port_index); 934 if (err) 935 goto err_port_free; 936 937 err = nsim_dev_port_debugfs_init(nsim_dev, nsim_dev_port); 938 if (err) 939 goto err_dl_port_unregister; 940 941 nsim_dev_port->ns = nsim_create(nsim_dev, nsim_dev_port); 942 if (IS_ERR(nsim_dev_port->ns)) { 943 err = PTR_ERR(nsim_dev_port->ns); 944 goto err_port_debugfs_exit; 945 } 946 947 devlink_port_type_eth_set(devlink_port, nsim_dev_port->ns->netdev); 948 list_add(&nsim_dev_port->list, &nsim_dev->port_list); 949 950 return 0; 951 952 err_port_debugfs_exit: 953 nsim_dev_port_debugfs_exit(nsim_dev_port); 954 err_dl_port_unregister: 955 devlink_port_unregister(devlink_port); 956 err_port_free: 957 kfree(nsim_dev_port); 958 return err; 959 } 960 961 static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port) 962 { 963 struct devlink_port *devlink_port = &nsim_dev_port->devlink_port; 964 965 list_del(&nsim_dev_port->list); 966 devlink_port_type_clear(devlink_port); 967 nsim_destroy(nsim_dev_port->ns); 968 nsim_dev_port_debugfs_exit(nsim_dev_port); 969 devlink_port_unregister(devlink_port); 970 kfree(nsim_dev_port); 971 } 972 973 static void nsim_dev_port_del_all(struct nsim_dev *nsim_dev) 974 { 975 struct nsim_dev_port *nsim_dev_port, *tmp; 976 977 mutex_lock(&nsim_dev->port_list_lock); 978 list_for_each_entry_safe(nsim_dev_port, tmp, 979 &nsim_dev->port_list, list) 980 __nsim_dev_port_del(nsim_dev_port); 981 mutex_unlock(&nsim_dev->port_list_lock); 982 } 983 984 static int nsim_dev_port_add_all(struct nsim_dev *nsim_dev, 985 unsigned int port_count) 986 { 987 int i, err; 988 989 for (i = 0; i < port_count; i++) { 990 err = __nsim_dev_port_add(nsim_dev, i); 991 if (err) 992 goto err_port_del_all; 993 } 994 return 0; 995 996 err_port_del_all: 997 nsim_dev_port_del_all(nsim_dev); 998 return err; 999 } 1000 1001 static int nsim_dev_reload_create(struct nsim_dev *nsim_dev, 1002 struct netlink_ext_ack *extack) 1003 { 1004 struct nsim_bus_dev *nsim_bus_dev = nsim_dev->nsim_bus_dev; 1005 struct devlink *devlink; 1006 int err; 1007 1008 devlink = priv_to_devlink(nsim_dev); 1009 nsim_dev = devlink_priv(devlink); 1010 INIT_LIST_HEAD(&nsim_dev->port_list); 1011 mutex_init(&nsim_dev->port_list_lock); 1012 nsim_dev->fw_update_status = true; 1013 nsim_dev->fw_update_overwrite_mask = 0; 1014 1015 nsim_devlink_param_load_driverinit_values(devlink); 1016 1017 err = nsim_dev_dummy_region_init(nsim_dev, devlink); 1018 if (err) 1019 return err; 1020 1021 err = nsim_dev_traps_init(devlink); 1022 if (err) 1023 goto err_dummy_region_exit; 1024 1025 nsim_dev->fib_data = nsim_fib_create(devlink, extack); 1026 if (IS_ERR(nsim_dev->fib_data)) { 1027 err = PTR_ERR(nsim_dev->fib_data); 1028 goto err_traps_exit; 1029 } 1030 1031 err = nsim_dev_health_init(nsim_dev, devlink); 1032 if (err) 1033 goto err_fib_destroy; 1034 1035 err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count); 1036 if (err) 1037 goto err_health_exit; 1038 1039 nsim_dev->take_snapshot = debugfs_create_file("take_snapshot", 1040 0200, 1041 nsim_dev->ddir, 1042 nsim_dev, 1043 &nsim_dev_take_snapshot_fops); 1044 return 0; 1045 1046 err_health_exit: 1047 nsim_dev_health_exit(nsim_dev); 1048 err_fib_destroy: 1049 nsim_fib_destroy(devlink, nsim_dev->fib_data); 1050 err_traps_exit: 1051 nsim_dev_traps_exit(devlink); 1052 err_dummy_region_exit: 1053 nsim_dev_dummy_region_exit(nsim_dev); 1054 return err; 1055 } 1056 1057 int nsim_dev_probe(struct nsim_bus_dev *nsim_bus_dev) 1058 { 1059 struct nsim_dev *nsim_dev; 1060 struct devlink *devlink; 1061 int err; 1062 1063 devlink = devlink_alloc(&nsim_dev_devlink_ops, sizeof(*nsim_dev)); 1064 if (!devlink) 1065 return -ENOMEM; 1066 devlink_net_set(devlink, nsim_bus_dev->initial_net); 1067 nsim_dev = devlink_priv(devlink); 1068 nsim_dev->nsim_bus_dev = nsim_bus_dev; 1069 nsim_dev->switch_id.id_len = sizeof(nsim_dev->switch_id.id); 1070 get_random_bytes(nsim_dev->switch_id.id, nsim_dev->switch_id.id_len); 1071 INIT_LIST_HEAD(&nsim_dev->port_list); 1072 mutex_init(&nsim_dev->port_list_lock); 1073 nsim_dev->fw_update_status = true; 1074 nsim_dev->fw_update_overwrite_mask = 0; 1075 nsim_dev->max_macs = NSIM_DEV_MAX_MACS_DEFAULT; 1076 nsim_dev->test1 = NSIM_DEV_TEST1_DEFAULT; 1077 spin_lock_init(&nsim_dev->fa_cookie_lock); 1078 1079 dev_set_drvdata(&nsim_bus_dev->dev, nsim_dev); 1080 1081 err = nsim_dev_resources_register(devlink); 1082 if (err) 1083 goto err_devlink_free; 1084 1085 err = devlink_register(devlink, &nsim_bus_dev->dev); 1086 if (err) 1087 goto err_resources_unregister; 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 nsim_dev->fib_data = nsim_fib_create(devlink, NULL); 1108 if (IS_ERR(nsim_dev->fib_data)) { 1109 err = PTR_ERR(nsim_dev->fib_data); 1110 goto err_debugfs_exit; 1111 } 1112 1113 err = nsim_dev_health_init(nsim_dev, devlink); 1114 if (err) 1115 goto err_fib_destroy; 1116 1117 err = nsim_bpf_dev_init(nsim_dev); 1118 if (err) 1119 goto err_health_exit; 1120 1121 err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count); 1122 if (err) 1123 goto err_bpf_dev_exit; 1124 1125 devlink_params_publish(devlink); 1126 devlink_reload_enable(devlink); 1127 return 0; 1128 1129 err_bpf_dev_exit: 1130 nsim_bpf_dev_exit(nsim_dev); 1131 err_health_exit: 1132 nsim_dev_health_exit(nsim_dev); 1133 err_fib_destroy: 1134 nsim_fib_destroy(devlink, nsim_dev->fib_data); 1135 err_debugfs_exit: 1136 nsim_dev_debugfs_exit(nsim_dev); 1137 err_traps_exit: 1138 nsim_dev_traps_exit(devlink); 1139 err_dummy_region_exit: 1140 nsim_dev_dummy_region_exit(nsim_dev); 1141 err_params_unregister: 1142 devlink_params_unregister(devlink, nsim_devlink_params, 1143 ARRAY_SIZE(nsim_devlink_params)); 1144 err_dl_unregister: 1145 devlink_unregister(devlink); 1146 err_resources_unregister: 1147 devlink_resources_unregister(devlink, NULL); 1148 err_devlink_free: 1149 devlink_free(devlink); 1150 return err; 1151 } 1152 1153 static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev) 1154 { 1155 struct devlink *devlink = priv_to_devlink(nsim_dev); 1156 1157 if (devlink_is_reload_failed(devlink)) 1158 return; 1159 debugfs_remove(nsim_dev->take_snapshot); 1160 nsim_dev_port_del_all(nsim_dev); 1161 nsim_dev_health_exit(nsim_dev); 1162 nsim_fib_destroy(devlink, nsim_dev->fib_data); 1163 nsim_dev_traps_exit(devlink); 1164 nsim_dev_dummy_region_exit(nsim_dev); 1165 mutex_destroy(&nsim_dev->port_list_lock); 1166 } 1167 1168 void nsim_dev_remove(struct nsim_bus_dev *nsim_bus_dev) 1169 { 1170 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); 1171 struct devlink *devlink = priv_to_devlink(nsim_dev); 1172 1173 devlink_reload_disable(devlink); 1174 1175 nsim_dev_reload_destroy(nsim_dev); 1176 1177 nsim_bpf_dev_exit(nsim_dev); 1178 nsim_dev_debugfs_exit(nsim_dev); 1179 devlink_params_unregister(devlink, nsim_devlink_params, 1180 ARRAY_SIZE(nsim_devlink_params)); 1181 devlink_unregister(devlink); 1182 devlink_resources_unregister(devlink, NULL); 1183 devlink_free(devlink); 1184 } 1185 1186 static struct nsim_dev_port * 1187 __nsim_dev_port_lookup(struct nsim_dev *nsim_dev, unsigned int port_index) 1188 { 1189 struct nsim_dev_port *nsim_dev_port; 1190 1191 list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list) 1192 if (nsim_dev_port->port_index == port_index) 1193 return nsim_dev_port; 1194 return NULL; 1195 } 1196 1197 int nsim_dev_port_add(struct nsim_bus_dev *nsim_bus_dev, 1198 unsigned int port_index) 1199 { 1200 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); 1201 int err; 1202 1203 mutex_lock(&nsim_dev->port_list_lock); 1204 if (__nsim_dev_port_lookup(nsim_dev, port_index)) 1205 err = -EEXIST; 1206 else 1207 err = __nsim_dev_port_add(nsim_dev, port_index); 1208 mutex_unlock(&nsim_dev->port_list_lock); 1209 return err; 1210 } 1211 1212 int nsim_dev_port_del(struct nsim_bus_dev *nsim_bus_dev, 1213 unsigned int port_index) 1214 { 1215 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); 1216 struct nsim_dev_port *nsim_dev_port; 1217 int err = 0; 1218 1219 mutex_lock(&nsim_dev->port_list_lock); 1220 nsim_dev_port = __nsim_dev_port_lookup(nsim_dev, port_index); 1221 if (!nsim_dev_port) 1222 err = -ENOENT; 1223 else 1224 __nsim_dev_port_del(nsim_dev_port); 1225 mutex_unlock(&nsim_dev->port_list_lock); 1226 return err; 1227 } 1228 1229 int nsim_dev_init(void) 1230 { 1231 nsim_dev_ddir = debugfs_create_dir(DRV_NAME, NULL); 1232 return PTR_ERR_OR_ZERO(nsim_dev_ddir); 1233 } 1234 1235 void nsim_dev_exit(void) 1236 { 1237 debugfs_remove_recursive(nsim_dev_ddir); 1238 } 1239