1 /* 2 * Copyright (c) 2018 Cumulus Networks. All rights reserved. 3 * Copyright (c) 2018 David Ahern <[email protected]> 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 <uapi/linux/devlink.h> 32 #include <uapi/linux/ip.h> 33 #include <uapi/linux/udp.h> 34 35 #include "netdevsim.h" 36 37 static struct dentry *nsim_dev_ddir; 38 39 #define NSIM_DEV_DUMMY_REGION_SIZE (1024 * 32) 40 41 static ssize_t nsim_dev_take_snapshot_write(struct file *file, 42 const char __user *data, 43 size_t count, loff_t *ppos) 44 { 45 struct nsim_dev *nsim_dev = file->private_data; 46 void *dummy_data; 47 int err; 48 u32 id; 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 id = devlink_region_shapshot_id_get(priv_to_devlink(nsim_dev)); 57 err = devlink_region_snapshot_create(nsim_dev->dummy_region, 58 dummy_data, id, kfree); 59 if (err) { 60 pr_err("Failed to create region snapshot\n"); 61 kfree(dummy_data); 62 return err; 63 } 64 65 return count; 66 } 67 68 static const struct file_operations nsim_dev_take_snapshot_fops = { 69 .open = simple_open, 70 .write = nsim_dev_take_snapshot_write, 71 .llseek = generic_file_llseek, 72 }; 73 74 static int nsim_dev_debugfs_init(struct nsim_dev *nsim_dev) 75 { 76 char dev_ddir_name[16]; 77 78 sprintf(dev_ddir_name, DRV_NAME "%u", nsim_dev->nsim_bus_dev->dev.id); 79 nsim_dev->ddir = debugfs_create_dir(dev_ddir_name, nsim_dev_ddir); 80 if (IS_ERR_OR_NULL(nsim_dev->ddir)) 81 return PTR_ERR_OR_ZERO(nsim_dev->ddir) ?: -EINVAL; 82 nsim_dev->ports_ddir = debugfs_create_dir("ports", nsim_dev->ddir); 83 if (IS_ERR_OR_NULL(nsim_dev->ports_ddir)) 84 return PTR_ERR_OR_ZERO(nsim_dev->ports_ddir) ?: -EINVAL; 85 debugfs_create_bool("fw_update_status", 0600, nsim_dev->ddir, 86 &nsim_dev->fw_update_status); 87 debugfs_create_u32("max_macs", 0600, nsim_dev->ddir, 88 &nsim_dev->max_macs); 89 debugfs_create_bool("test1", 0600, nsim_dev->ddir, 90 &nsim_dev->test1); 91 debugfs_create_file("take_snapshot", 0200, nsim_dev->ddir, nsim_dev, 92 &nsim_dev_take_snapshot_fops); 93 return 0; 94 } 95 96 static void nsim_dev_debugfs_exit(struct nsim_dev *nsim_dev) 97 { 98 debugfs_remove_recursive(nsim_dev->ports_ddir); 99 debugfs_remove_recursive(nsim_dev->ddir); 100 } 101 102 static int nsim_dev_port_debugfs_init(struct nsim_dev *nsim_dev, 103 struct nsim_dev_port *nsim_dev_port) 104 { 105 char port_ddir_name[16]; 106 char dev_link_name[32]; 107 108 sprintf(port_ddir_name, "%u", nsim_dev_port->port_index); 109 nsim_dev_port->ddir = debugfs_create_dir(port_ddir_name, 110 nsim_dev->ports_ddir); 111 if (IS_ERR_OR_NULL(nsim_dev_port->ddir)) 112 return -ENOMEM; 113 114 sprintf(dev_link_name, "../../../" DRV_NAME "%u", 115 nsim_dev->nsim_bus_dev->dev.id); 116 debugfs_create_symlink("dev", nsim_dev_port->ddir, dev_link_name); 117 118 return 0; 119 } 120 121 static void nsim_dev_port_debugfs_exit(struct nsim_dev_port *nsim_dev_port) 122 { 123 debugfs_remove_recursive(nsim_dev_port->ddir); 124 } 125 126 static struct net *nsim_devlink_net(struct devlink *devlink) 127 { 128 return &init_net; 129 } 130 131 static u64 nsim_dev_ipv4_fib_resource_occ_get(void *priv) 132 { 133 struct net *net = priv; 134 135 return nsim_fib_get_val(net, NSIM_RESOURCE_IPV4_FIB, false); 136 } 137 138 static u64 nsim_dev_ipv4_fib_rules_res_occ_get(void *priv) 139 { 140 struct net *net = priv; 141 142 return nsim_fib_get_val(net, NSIM_RESOURCE_IPV4_FIB_RULES, false); 143 } 144 145 static u64 nsim_dev_ipv6_fib_resource_occ_get(void *priv) 146 { 147 struct net *net = priv; 148 149 return nsim_fib_get_val(net, NSIM_RESOURCE_IPV6_FIB, false); 150 } 151 152 static u64 nsim_dev_ipv6_fib_rules_res_occ_get(void *priv) 153 { 154 struct net *net = priv; 155 156 return nsim_fib_get_val(net, NSIM_RESOURCE_IPV6_FIB_RULES, false); 157 } 158 159 static int nsim_dev_resources_register(struct devlink *devlink) 160 { 161 struct devlink_resource_size_params params = { 162 .size_max = (u64)-1, 163 .size_granularity = 1, 164 .unit = DEVLINK_RESOURCE_UNIT_ENTRY 165 }; 166 struct net *net = nsim_devlink_net(devlink); 167 int err; 168 u64 n; 169 170 /* Resources for IPv4 */ 171 err = devlink_resource_register(devlink, "IPv4", (u64)-1, 172 NSIM_RESOURCE_IPV4, 173 DEVLINK_RESOURCE_ID_PARENT_TOP, 174 ¶ms); 175 if (err) { 176 pr_err("Failed to register IPv4 top resource\n"); 177 goto out; 178 } 179 180 n = nsim_fib_get_val(net, NSIM_RESOURCE_IPV4_FIB, true); 181 err = devlink_resource_register(devlink, "fib", n, 182 NSIM_RESOURCE_IPV4_FIB, 183 NSIM_RESOURCE_IPV4, ¶ms); 184 if (err) { 185 pr_err("Failed to register IPv4 FIB resource\n"); 186 return err; 187 } 188 189 n = nsim_fib_get_val(net, NSIM_RESOURCE_IPV4_FIB_RULES, true); 190 err = devlink_resource_register(devlink, "fib-rules", n, 191 NSIM_RESOURCE_IPV4_FIB_RULES, 192 NSIM_RESOURCE_IPV4, ¶ms); 193 if (err) { 194 pr_err("Failed to register IPv4 FIB rules resource\n"); 195 return err; 196 } 197 198 /* Resources for IPv6 */ 199 err = devlink_resource_register(devlink, "IPv6", (u64)-1, 200 NSIM_RESOURCE_IPV6, 201 DEVLINK_RESOURCE_ID_PARENT_TOP, 202 ¶ms); 203 if (err) { 204 pr_err("Failed to register IPv6 top resource\n"); 205 goto out; 206 } 207 208 n = nsim_fib_get_val(net, NSIM_RESOURCE_IPV6_FIB, true); 209 err = devlink_resource_register(devlink, "fib", n, 210 NSIM_RESOURCE_IPV6_FIB, 211 NSIM_RESOURCE_IPV6, ¶ms); 212 if (err) { 213 pr_err("Failed to register IPv6 FIB resource\n"); 214 return err; 215 } 216 217 n = nsim_fib_get_val(net, NSIM_RESOURCE_IPV6_FIB_RULES, true); 218 err = devlink_resource_register(devlink, "fib-rules", n, 219 NSIM_RESOURCE_IPV6_FIB_RULES, 220 NSIM_RESOURCE_IPV6, ¶ms); 221 if (err) { 222 pr_err("Failed to register IPv6 FIB rules resource\n"); 223 return err; 224 } 225 226 devlink_resource_occ_get_register(devlink, 227 NSIM_RESOURCE_IPV4_FIB, 228 nsim_dev_ipv4_fib_resource_occ_get, 229 net); 230 devlink_resource_occ_get_register(devlink, 231 NSIM_RESOURCE_IPV4_FIB_RULES, 232 nsim_dev_ipv4_fib_rules_res_occ_get, 233 net); 234 devlink_resource_occ_get_register(devlink, 235 NSIM_RESOURCE_IPV6_FIB, 236 nsim_dev_ipv6_fib_resource_occ_get, 237 net); 238 devlink_resource_occ_get_register(devlink, 239 NSIM_RESOURCE_IPV6_FIB_RULES, 240 nsim_dev_ipv6_fib_rules_res_occ_get, 241 net); 242 out: 243 return err; 244 } 245 246 enum nsim_devlink_param_id { 247 NSIM_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX, 248 NSIM_DEVLINK_PARAM_ID_TEST1, 249 }; 250 251 static const struct devlink_param nsim_devlink_params[] = { 252 DEVLINK_PARAM_GENERIC(MAX_MACS, 253 BIT(DEVLINK_PARAM_CMODE_DRIVERINIT), 254 NULL, NULL, NULL), 255 DEVLINK_PARAM_DRIVER(NSIM_DEVLINK_PARAM_ID_TEST1, 256 "test1", DEVLINK_PARAM_TYPE_BOOL, 257 BIT(DEVLINK_PARAM_CMODE_DRIVERINIT), 258 NULL, NULL, NULL), 259 }; 260 261 static void nsim_devlink_set_params_init_values(struct nsim_dev *nsim_dev, 262 struct devlink *devlink) 263 { 264 union devlink_param_value value; 265 266 value.vu32 = nsim_dev->max_macs; 267 devlink_param_driverinit_value_set(devlink, 268 DEVLINK_PARAM_GENERIC_ID_MAX_MACS, 269 value); 270 value.vbool = nsim_dev->test1; 271 devlink_param_driverinit_value_set(devlink, 272 NSIM_DEVLINK_PARAM_ID_TEST1, 273 value); 274 } 275 276 static void nsim_devlink_param_load_driverinit_values(struct devlink *devlink) 277 { 278 struct nsim_dev *nsim_dev = devlink_priv(devlink); 279 union devlink_param_value saved_value; 280 int err; 281 282 err = devlink_param_driverinit_value_get(devlink, 283 DEVLINK_PARAM_GENERIC_ID_MAX_MACS, 284 &saved_value); 285 if (!err) 286 nsim_dev->max_macs = saved_value.vu32; 287 err = devlink_param_driverinit_value_get(devlink, 288 NSIM_DEVLINK_PARAM_ID_TEST1, 289 &saved_value); 290 if (!err) 291 nsim_dev->test1 = saved_value.vbool; 292 } 293 294 #define NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX 16 295 296 static int nsim_dev_dummy_region_init(struct nsim_dev *nsim_dev, 297 struct devlink *devlink) 298 { 299 nsim_dev->dummy_region = 300 devlink_region_create(devlink, "dummy", 301 NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX, 302 NSIM_DEV_DUMMY_REGION_SIZE); 303 return PTR_ERR_OR_ZERO(nsim_dev->dummy_region); 304 } 305 306 static void nsim_dev_dummy_region_exit(struct nsim_dev *nsim_dev) 307 { 308 devlink_region_destroy(nsim_dev->dummy_region); 309 } 310 311 struct nsim_trap_item { 312 void *trap_ctx; 313 enum devlink_trap_action action; 314 }; 315 316 struct nsim_trap_data { 317 struct delayed_work trap_report_dw; 318 struct nsim_trap_item *trap_items_arr; 319 struct nsim_dev *nsim_dev; 320 spinlock_t trap_lock; /* Protects trap_items_arr */ 321 }; 322 323 /* All driver-specific traps must be documented in 324 * Documentation/networking/devlink-trap-netdevsim.rst 325 */ 326 enum { 327 NSIM_TRAP_ID_BASE = DEVLINK_TRAP_GENERIC_ID_MAX, 328 NSIM_TRAP_ID_FID_MISS, 329 }; 330 331 #define NSIM_TRAP_NAME_FID_MISS "fid_miss" 332 333 #define NSIM_TRAP_METADATA DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT 334 335 #define NSIM_TRAP_DROP(_id, _group_id) \ 336 DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \ 337 DEVLINK_TRAP_GROUP_GENERIC(_group_id), \ 338 NSIM_TRAP_METADATA) 339 #define NSIM_TRAP_EXCEPTION(_id, _group_id) \ 340 DEVLINK_TRAP_GENERIC(EXCEPTION, TRAP, _id, \ 341 DEVLINK_TRAP_GROUP_GENERIC(_group_id), \ 342 NSIM_TRAP_METADATA) 343 #define NSIM_TRAP_DRIVER_EXCEPTION(_id, _group_id) \ 344 DEVLINK_TRAP_DRIVER(EXCEPTION, TRAP, NSIM_TRAP_ID_##_id, \ 345 NSIM_TRAP_NAME_##_id, \ 346 DEVLINK_TRAP_GROUP_GENERIC(_group_id), \ 347 NSIM_TRAP_METADATA) 348 349 static const struct devlink_trap nsim_traps_arr[] = { 350 NSIM_TRAP_DROP(SMAC_MC, L2_DROPS), 351 NSIM_TRAP_DROP(VLAN_TAG_MISMATCH, L2_DROPS), 352 NSIM_TRAP_DROP(INGRESS_VLAN_FILTER, L2_DROPS), 353 NSIM_TRAP_DROP(INGRESS_STP_FILTER, L2_DROPS), 354 NSIM_TRAP_DROP(EMPTY_TX_LIST, L2_DROPS), 355 NSIM_TRAP_DROP(PORT_LOOPBACK_FILTER, L2_DROPS), 356 NSIM_TRAP_DRIVER_EXCEPTION(FID_MISS, L2_DROPS), 357 NSIM_TRAP_DROP(BLACKHOLE_ROUTE, L3_DROPS), 358 NSIM_TRAP_EXCEPTION(TTL_ERROR, L3_DROPS), 359 NSIM_TRAP_DROP(TAIL_DROP, BUFFER_DROPS), 360 }; 361 362 #define NSIM_TRAP_L4_DATA_LEN 100 363 364 static struct sk_buff *nsim_dev_trap_skb_build(void) 365 { 366 int tot_len, data_len = NSIM_TRAP_L4_DATA_LEN; 367 struct sk_buff *skb; 368 struct udphdr *udph; 369 struct ethhdr *eth; 370 struct iphdr *iph; 371 372 skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); 373 if (!skb) 374 return NULL; 375 tot_len = sizeof(struct iphdr) + sizeof(struct udphdr) + data_len; 376 377 eth = skb_put(skb, sizeof(struct ethhdr)); 378 eth_random_addr(eth->h_dest); 379 eth_random_addr(eth->h_source); 380 eth->h_proto = htons(ETH_P_IP); 381 skb->protocol = htons(ETH_P_IP); 382 383 iph = skb_put(skb, sizeof(struct iphdr)); 384 iph->protocol = IPPROTO_UDP; 385 iph->saddr = in_aton("192.0.2.1"); 386 iph->daddr = in_aton("198.51.100.1"); 387 iph->version = 0x4; 388 iph->frag_off = 0; 389 iph->ihl = 0x5; 390 iph->tot_len = htons(tot_len); 391 iph->ttl = 100; 392 iph->check = 0; 393 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl); 394 395 udph = skb_put_zero(skb, sizeof(struct udphdr) + data_len); 396 get_random_bytes(&udph->source, sizeof(u16)); 397 get_random_bytes(&udph->dest, sizeof(u16)); 398 udph->len = htons(sizeof(struct udphdr) + data_len); 399 400 return skb; 401 } 402 403 static void nsim_dev_trap_report(struct nsim_dev_port *nsim_dev_port) 404 { 405 struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev; 406 struct devlink *devlink = priv_to_devlink(nsim_dev); 407 struct nsim_trap_data *nsim_trap_data; 408 int i; 409 410 nsim_trap_data = nsim_dev->trap_data; 411 412 spin_lock(&nsim_trap_data->trap_lock); 413 for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) { 414 struct nsim_trap_item *nsim_trap_item; 415 struct sk_buff *skb; 416 417 nsim_trap_item = &nsim_trap_data->trap_items_arr[i]; 418 if (nsim_trap_item->action == DEVLINK_TRAP_ACTION_DROP) 419 continue; 420 421 skb = nsim_dev_trap_skb_build(); 422 if (!skb) 423 continue; 424 skb->dev = nsim_dev_port->ns->netdev; 425 426 /* Trapped packets are usually passed to devlink in softIRQ, 427 * but in this case they are generated in a workqueue. Disable 428 * softIRQs to prevent lockdep from complaining about 429 * "incosistent lock state". 430 */ 431 local_bh_disable(); 432 devlink_trap_report(devlink, skb, nsim_trap_item->trap_ctx, 433 &nsim_dev_port->devlink_port); 434 local_bh_enable(); 435 consume_skb(skb); 436 } 437 spin_unlock(&nsim_trap_data->trap_lock); 438 } 439 440 #define NSIM_TRAP_REPORT_INTERVAL_MS 100 441 442 static void nsim_dev_trap_report_work(struct work_struct *work) 443 { 444 struct nsim_trap_data *nsim_trap_data; 445 struct nsim_dev_port *nsim_dev_port; 446 struct nsim_dev *nsim_dev; 447 448 nsim_trap_data = container_of(work, struct nsim_trap_data, 449 trap_report_dw.work); 450 nsim_dev = nsim_trap_data->nsim_dev; 451 452 /* For each running port and enabled packet trap, generate a UDP 453 * packet with a random 5-tuple and report it. 454 */ 455 mutex_lock(&nsim_dev->port_list_lock); 456 list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list) { 457 if (!netif_running(nsim_dev_port->ns->netdev)) 458 continue; 459 460 nsim_dev_trap_report(nsim_dev_port); 461 } 462 mutex_unlock(&nsim_dev->port_list_lock); 463 464 schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw, 465 msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS)); 466 } 467 468 static int nsim_dev_traps_init(struct devlink *devlink) 469 { 470 struct nsim_dev *nsim_dev = devlink_priv(devlink); 471 struct nsim_trap_data *nsim_trap_data; 472 int err; 473 474 nsim_trap_data = kzalloc(sizeof(*nsim_trap_data), GFP_KERNEL); 475 if (!nsim_trap_data) 476 return -ENOMEM; 477 478 nsim_trap_data->trap_items_arr = kcalloc(ARRAY_SIZE(nsim_traps_arr), 479 sizeof(struct nsim_trap_item), 480 GFP_KERNEL); 481 if (!nsim_trap_data->trap_items_arr) { 482 err = -ENOMEM; 483 goto err_trap_data_free; 484 } 485 486 /* The lock is used to protect the action state of the registered 487 * traps. The value is written by user and read in delayed work when 488 * iterating over all the traps. 489 */ 490 spin_lock_init(&nsim_trap_data->trap_lock); 491 nsim_trap_data->nsim_dev = nsim_dev; 492 nsim_dev->trap_data = nsim_trap_data; 493 494 err = devlink_traps_register(devlink, nsim_traps_arr, 495 ARRAY_SIZE(nsim_traps_arr), NULL); 496 if (err) 497 goto err_trap_items_free; 498 499 INIT_DELAYED_WORK(&nsim_dev->trap_data->trap_report_dw, 500 nsim_dev_trap_report_work); 501 schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw, 502 msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS)); 503 504 return 0; 505 506 err_trap_items_free: 507 kfree(nsim_trap_data->trap_items_arr); 508 err_trap_data_free: 509 kfree(nsim_trap_data); 510 return err; 511 } 512 513 static void nsim_dev_traps_exit(struct devlink *devlink) 514 { 515 struct nsim_dev *nsim_dev = devlink_priv(devlink); 516 517 cancel_delayed_work_sync(&nsim_dev->trap_data->trap_report_dw); 518 devlink_traps_unregister(devlink, nsim_traps_arr, 519 ARRAY_SIZE(nsim_traps_arr)); 520 kfree(nsim_dev->trap_data->trap_items_arr); 521 kfree(nsim_dev->trap_data); 522 } 523 524 static int nsim_dev_reload_down(struct devlink *devlink, 525 struct netlink_ext_ack *extack) 526 { 527 return 0; 528 } 529 530 static int nsim_dev_reload_up(struct devlink *devlink, 531 struct netlink_ext_ack *extack) 532 { 533 enum nsim_resource_id res_ids[] = { 534 NSIM_RESOURCE_IPV4_FIB, NSIM_RESOURCE_IPV4_FIB_RULES, 535 NSIM_RESOURCE_IPV6_FIB, NSIM_RESOURCE_IPV6_FIB_RULES 536 }; 537 struct net *net = nsim_devlink_net(devlink); 538 int i; 539 540 for (i = 0; i < ARRAY_SIZE(res_ids); ++i) { 541 int err; 542 u64 val; 543 544 err = devlink_resource_size_get(devlink, res_ids[i], &val); 545 if (!err) { 546 err = nsim_fib_set_max(net, res_ids[i], val, extack); 547 if (err) 548 return err; 549 } 550 } 551 nsim_devlink_param_load_driverinit_values(devlink); 552 553 return 0; 554 } 555 556 #define NSIM_DEV_FLASH_SIZE 500000 557 #define NSIM_DEV_FLASH_CHUNK_SIZE 1000 558 #define NSIM_DEV_FLASH_CHUNK_TIME_MS 10 559 560 static int nsim_dev_flash_update(struct devlink *devlink, const char *file_name, 561 const char *component, 562 struct netlink_ext_ack *extack) 563 { 564 struct nsim_dev *nsim_dev = devlink_priv(devlink); 565 int i; 566 567 if (nsim_dev->fw_update_status) { 568 devlink_flash_update_begin_notify(devlink); 569 devlink_flash_update_status_notify(devlink, 570 "Preparing to flash", 571 component, 0, 0); 572 } 573 574 for (i = 0; i < NSIM_DEV_FLASH_SIZE / NSIM_DEV_FLASH_CHUNK_SIZE; i++) { 575 if (nsim_dev->fw_update_status) 576 devlink_flash_update_status_notify(devlink, "Flashing", 577 component, 578 i * NSIM_DEV_FLASH_CHUNK_SIZE, 579 NSIM_DEV_FLASH_SIZE); 580 msleep(NSIM_DEV_FLASH_CHUNK_TIME_MS); 581 } 582 583 if (nsim_dev->fw_update_status) { 584 devlink_flash_update_status_notify(devlink, "Flashing", 585 component, 586 NSIM_DEV_FLASH_SIZE, 587 NSIM_DEV_FLASH_SIZE); 588 devlink_flash_update_status_notify(devlink, "Flashing done", 589 component, 0, 0); 590 devlink_flash_update_end_notify(devlink); 591 } 592 593 return 0; 594 } 595 596 static struct nsim_trap_item * 597 nsim_dev_trap_item_lookup(struct nsim_dev *nsim_dev, u16 trap_id) 598 { 599 struct nsim_trap_data *nsim_trap_data = nsim_dev->trap_data; 600 int i; 601 602 for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) { 603 if (nsim_traps_arr[i].id == trap_id) 604 return &nsim_trap_data->trap_items_arr[i]; 605 } 606 607 return NULL; 608 } 609 610 static int nsim_dev_devlink_trap_init(struct devlink *devlink, 611 const struct devlink_trap *trap, 612 void *trap_ctx) 613 { 614 struct nsim_dev *nsim_dev = devlink_priv(devlink); 615 struct nsim_trap_item *nsim_trap_item; 616 617 nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id); 618 if (WARN_ON(!nsim_trap_item)) 619 return -ENOENT; 620 621 nsim_trap_item->trap_ctx = trap_ctx; 622 nsim_trap_item->action = trap->init_action; 623 624 return 0; 625 } 626 627 static int 628 nsim_dev_devlink_trap_action_set(struct devlink *devlink, 629 const struct devlink_trap *trap, 630 enum devlink_trap_action action) 631 { 632 struct nsim_dev *nsim_dev = devlink_priv(devlink); 633 struct nsim_trap_item *nsim_trap_item; 634 635 nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id); 636 if (WARN_ON(!nsim_trap_item)) 637 return -ENOENT; 638 639 spin_lock(&nsim_dev->trap_data->trap_lock); 640 nsim_trap_item->action = action; 641 spin_unlock(&nsim_dev->trap_data->trap_lock); 642 643 return 0; 644 } 645 646 static const struct devlink_ops nsim_dev_devlink_ops = { 647 .reload_down = nsim_dev_reload_down, 648 .reload_up = nsim_dev_reload_up, 649 .flash_update = nsim_dev_flash_update, 650 .trap_init = nsim_dev_devlink_trap_init, 651 .trap_action_set = nsim_dev_devlink_trap_action_set, 652 }; 653 654 #define NSIM_DEV_MAX_MACS_DEFAULT 32 655 #define NSIM_DEV_TEST1_DEFAULT true 656 657 static struct nsim_dev * 658 nsim_dev_create(struct nsim_bus_dev *nsim_bus_dev, unsigned int port_count) 659 { 660 struct nsim_dev *nsim_dev; 661 struct devlink *devlink; 662 int err; 663 664 devlink = devlink_alloc(&nsim_dev_devlink_ops, sizeof(*nsim_dev)); 665 if (!devlink) 666 return ERR_PTR(-ENOMEM); 667 nsim_dev = devlink_priv(devlink); 668 nsim_dev->nsim_bus_dev = nsim_bus_dev; 669 nsim_dev->switch_id.id_len = sizeof(nsim_dev->switch_id.id); 670 get_random_bytes(nsim_dev->switch_id.id, nsim_dev->switch_id.id_len); 671 INIT_LIST_HEAD(&nsim_dev->port_list); 672 mutex_init(&nsim_dev->port_list_lock); 673 nsim_dev->fw_update_status = true; 674 nsim_dev->max_macs = NSIM_DEV_MAX_MACS_DEFAULT; 675 nsim_dev->test1 = NSIM_DEV_TEST1_DEFAULT; 676 677 err = nsim_dev_resources_register(devlink); 678 if (err) 679 goto err_devlink_free; 680 681 err = devlink_register(devlink, &nsim_bus_dev->dev); 682 if (err) 683 goto err_resources_unregister; 684 685 err = devlink_params_register(devlink, nsim_devlink_params, 686 ARRAY_SIZE(nsim_devlink_params)); 687 if (err) 688 goto err_dl_unregister; 689 nsim_devlink_set_params_init_values(nsim_dev, devlink); 690 691 err = nsim_dev_dummy_region_init(nsim_dev, devlink); 692 if (err) 693 goto err_params_unregister; 694 695 err = nsim_dev_traps_init(devlink); 696 if (err) 697 goto err_dummy_region_exit; 698 699 err = nsim_dev_debugfs_init(nsim_dev); 700 if (err) 701 goto err_traps_exit; 702 703 err = nsim_bpf_dev_init(nsim_dev); 704 if (err) 705 goto err_debugfs_exit; 706 707 devlink_params_publish(devlink); 708 return nsim_dev; 709 710 err_debugfs_exit: 711 nsim_dev_debugfs_exit(nsim_dev); 712 err_traps_exit: 713 nsim_dev_traps_exit(devlink); 714 err_dummy_region_exit: 715 nsim_dev_dummy_region_exit(nsim_dev); 716 err_params_unregister: 717 devlink_params_unregister(devlink, nsim_devlink_params, 718 ARRAY_SIZE(nsim_devlink_params)); 719 err_dl_unregister: 720 devlink_unregister(devlink); 721 err_resources_unregister: 722 devlink_resources_unregister(devlink, NULL); 723 err_devlink_free: 724 devlink_free(devlink); 725 return ERR_PTR(err); 726 } 727 728 static void nsim_dev_destroy(struct nsim_dev *nsim_dev) 729 { 730 struct devlink *devlink = priv_to_devlink(nsim_dev); 731 732 nsim_bpf_dev_exit(nsim_dev); 733 nsim_dev_debugfs_exit(nsim_dev); 734 nsim_dev_traps_exit(devlink); 735 nsim_dev_dummy_region_exit(nsim_dev); 736 devlink_params_unregister(devlink, nsim_devlink_params, 737 ARRAY_SIZE(nsim_devlink_params)); 738 devlink_unregister(devlink); 739 devlink_resources_unregister(devlink, NULL); 740 mutex_destroy(&nsim_dev->port_list_lock); 741 devlink_free(devlink); 742 } 743 744 static int __nsim_dev_port_add(struct nsim_dev *nsim_dev, 745 unsigned int port_index) 746 { 747 struct nsim_dev_port *nsim_dev_port; 748 struct devlink_port *devlink_port; 749 int err; 750 751 nsim_dev_port = kzalloc(sizeof(*nsim_dev_port), GFP_KERNEL); 752 if (!nsim_dev_port) 753 return -ENOMEM; 754 nsim_dev_port->port_index = port_index; 755 756 devlink_port = &nsim_dev_port->devlink_port; 757 devlink_port_attrs_set(devlink_port, DEVLINK_PORT_FLAVOUR_PHYSICAL, 758 port_index + 1, 0, 0, 759 nsim_dev->switch_id.id, 760 nsim_dev->switch_id.id_len); 761 err = devlink_port_register(priv_to_devlink(nsim_dev), devlink_port, 762 port_index); 763 if (err) 764 goto err_port_free; 765 766 err = nsim_dev_port_debugfs_init(nsim_dev, nsim_dev_port); 767 if (err) 768 goto err_dl_port_unregister; 769 770 nsim_dev_port->ns = nsim_create(nsim_dev, nsim_dev_port); 771 if (IS_ERR(nsim_dev_port->ns)) { 772 err = PTR_ERR(nsim_dev_port->ns); 773 goto err_port_debugfs_exit; 774 } 775 776 devlink_port_type_eth_set(devlink_port, nsim_dev_port->ns->netdev); 777 list_add(&nsim_dev_port->list, &nsim_dev->port_list); 778 779 return 0; 780 781 err_port_debugfs_exit: 782 nsim_dev_port_debugfs_exit(nsim_dev_port); 783 err_dl_port_unregister: 784 devlink_port_unregister(devlink_port); 785 err_port_free: 786 kfree(nsim_dev_port); 787 return err; 788 } 789 790 static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port) 791 { 792 struct devlink_port *devlink_port = &nsim_dev_port->devlink_port; 793 794 list_del(&nsim_dev_port->list); 795 devlink_port_type_clear(devlink_port); 796 nsim_destroy(nsim_dev_port->ns); 797 nsim_dev_port_debugfs_exit(nsim_dev_port); 798 devlink_port_unregister(devlink_port); 799 kfree(nsim_dev_port); 800 } 801 802 static void nsim_dev_port_del_all(struct nsim_dev *nsim_dev) 803 { 804 struct nsim_dev_port *nsim_dev_port, *tmp; 805 806 list_for_each_entry_safe(nsim_dev_port, tmp, 807 &nsim_dev->port_list, list) 808 __nsim_dev_port_del(nsim_dev_port); 809 } 810 811 int nsim_dev_probe(struct nsim_bus_dev *nsim_bus_dev) 812 { 813 struct nsim_dev *nsim_dev; 814 int i; 815 int err; 816 817 nsim_dev = nsim_dev_create(nsim_bus_dev, nsim_bus_dev->port_count); 818 if (IS_ERR(nsim_dev)) 819 return PTR_ERR(nsim_dev); 820 dev_set_drvdata(&nsim_bus_dev->dev, nsim_dev); 821 822 for (i = 0; i < nsim_bus_dev->port_count; i++) { 823 err = __nsim_dev_port_add(nsim_dev, i); 824 if (err) 825 goto err_port_del_all; 826 } 827 return 0; 828 829 err_port_del_all: 830 nsim_dev_port_del_all(nsim_dev); 831 nsim_dev_destroy(nsim_dev); 832 return err; 833 } 834 835 void nsim_dev_remove(struct nsim_bus_dev *nsim_bus_dev) 836 { 837 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); 838 839 nsim_dev_port_del_all(nsim_dev); 840 nsim_dev_destroy(nsim_dev); 841 } 842 843 static struct nsim_dev_port * 844 __nsim_dev_port_lookup(struct nsim_dev *nsim_dev, unsigned int port_index) 845 { 846 struct nsim_dev_port *nsim_dev_port; 847 848 list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list) 849 if (nsim_dev_port->port_index == port_index) 850 return nsim_dev_port; 851 return NULL; 852 } 853 854 int nsim_dev_port_add(struct nsim_bus_dev *nsim_bus_dev, 855 unsigned int port_index) 856 { 857 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); 858 int err; 859 860 mutex_lock(&nsim_dev->port_list_lock); 861 if (__nsim_dev_port_lookup(nsim_dev, port_index)) 862 err = -EEXIST; 863 else 864 err = __nsim_dev_port_add(nsim_dev, port_index); 865 mutex_unlock(&nsim_dev->port_list_lock); 866 return err; 867 } 868 869 int nsim_dev_port_del(struct nsim_bus_dev *nsim_bus_dev, 870 unsigned int port_index) 871 { 872 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); 873 struct nsim_dev_port *nsim_dev_port; 874 int err = 0; 875 876 mutex_lock(&nsim_dev->port_list_lock); 877 nsim_dev_port = __nsim_dev_port_lookup(nsim_dev, port_index); 878 if (!nsim_dev_port) 879 err = -ENOENT; 880 else 881 __nsim_dev_port_del(nsim_dev_port); 882 mutex_unlock(&nsim_dev->port_list_lock); 883 return err; 884 } 885 886 int nsim_dev_init(void) 887 { 888 nsim_dev_ddir = debugfs_create_dir(DRV_NAME, NULL); 889 if (IS_ERR_OR_NULL(nsim_dev_ddir)) 890 return -ENOMEM; 891 return 0; 892 } 893 894 void nsim_dev_exit(void) 895 { 896 debugfs_remove_recursive(nsim_dev_ddir); 897 } 898