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 <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 skb_reset_mac_header(skb); 378 eth = skb_put(skb, sizeof(struct ethhdr)); 379 eth_random_addr(eth->h_dest); 380 eth_random_addr(eth->h_source); 381 eth->h_proto = htons(ETH_P_IP); 382 skb->protocol = htons(ETH_P_IP); 383 384 skb_set_network_header(skb, skb->len); 385 iph = skb_put(skb, sizeof(struct iphdr)); 386 iph->protocol = IPPROTO_UDP; 387 iph->saddr = in_aton("192.0.2.1"); 388 iph->daddr = in_aton("198.51.100.1"); 389 iph->version = 0x4; 390 iph->frag_off = 0; 391 iph->ihl = 0x5; 392 iph->tot_len = htons(tot_len); 393 iph->ttl = 100; 394 iph->check = 0; 395 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl); 396 397 skb_set_transport_header(skb, skb->len); 398 udph = skb_put_zero(skb, sizeof(struct udphdr) + data_len); 399 get_random_bytes(&udph->source, sizeof(u16)); 400 get_random_bytes(&udph->dest, sizeof(u16)); 401 udph->len = htons(sizeof(struct udphdr) + data_len); 402 403 return skb; 404 } 405 406 static void nsim_dev_trap_report(struct nsim_dev_port *nsim_dev_port) 407 { 408 struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev; 409 struct devlink *devlink = priv_to_devlink(nsim_dev); 410 struct nsim_trap_data *nsim_trap_data; 411 int i; 412 413 nsim_trap_data = nsim_dev->trap_data; 414 415 spin_lock(&nsim_trap_data->trap_lock); 416 for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) { 417 struct nsim_trap_item *nsim_trap_item; 418 struct sk_buff *skb; 419 420 nsim_trap_item = &nsim_trap_data->trap_items_arr[i]; 421 if (nsim_trap_item->action == DEVLINK_TRAP_ACTION_DROP) 422 continue; 423 424 skb = nsim_dev_trap_skb_build(); 425 if (!skb) 426 continue; 427 skb->dev = nsim_dev_port->ns->netdev; 428 429 /* Trapped packets are usually passed to devlink in softIRQ, 430 * but in this case they are generated in a workqueue. Disable 431 * softIRQs to prevent lockdep from complaining about 432 * "incosistent lock state". 433 */ 434 local_bh_disable(); 435 devlink_trap_report(devlink, skb, nsim_trap_item->trap_ctx, 436 &nsim_dev_port->devlink_port); 437 local_bh_enable(); 438 consume_skb(skb); 439 } 440 spin_unlock(&nsim_trap_data->trap_lock); 441 } 442 443 #define NSIM_TRAP_REPORT_INTERVAL_MS 100 444 445 static void nsim_dev_trap_report_work(struct work_struct *work) 446 { 447 struct nsim_trap_data *nsim_trap_data; 448 struct nsim_dev_port *nsim_dev_port; 449 struct nsim_dev *nsim_dev; 450 451 nsim_trap_data = container_of(work, struct nsim_trap_data, 452 trap_report_dw.work); 453 nsim_dev = nsim_trap_data->nsim_dev; 454 455 /* For each running port and enabled packet trap, generate a UDP 456 * packet with a random 5-tuple and report it. 457 */ 458 mutex_lock(&nsim_dev->port_list_lock); 459 list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list) { 460 if (!netif_running(nsim_dev_port->ns->netdev)) 461 continue; 462 463 nsim_dev_trap_report(nsim_dev_port); 464 } 465 mutex_unlock(&nsim_dev->port_list_lock); 466 467 schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw, 468 msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS)); 469 } 470 471 static int nsim_dev_traps_init(struct devlink *devlink) 472 { 473 struct nsim_dev *nsim_dev = devlink_priv(devlink); 474 struct nsim_trap_data *nsim_trap_data; 475 int err; 476 477 nsim_trap_data = kzalloc(sizeof(*nsim_trap_data), GFP_KERNEL); 478 if (!nsim_trap_data) 479 return -ENOMEM; 480 481 nsim_trap_data->trap_items_arr = kcalloc(ARRAY_SIZE(nsim_traps_arr), 482 sizeof(struct nsim_trap_item), 483 GFP_KERNEL); 484 if (!nsim_trap_data->trap_items_arr) { 485 err = -ENOMEM; 486 goto err_trap_data_free; 487 } 488 489 /* The lock is used to protect the action state of the registered 490 * traps. The value is written by user and read in delayed work when 491 * iterating over all the traps. 492 */ 493 spin_lock_init(&nsim_trap_data->trap_lock); 494 nsim_trap_data->nsim_dev = nsim_dev; 495 nsim_dev->trap_data = nsim_trap_data; 496 497 err = devlink_traps_register(devlink, nsim_traps_arr, 498 ARRAY_SIZE(nsim_traps_arr), NULL); 499 if (err) 500 goto err_trap_items_free; 501 502 INIT_DELAYED_WORK(&nsim_dev->trap_data->trap_report_dw, 503 nsim_dev_trap_report_work); 504 schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw, 505 msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS)); 506 507 return 0; 508 509 err_trap_items_free: 510 kfree(nsim_trap_data->trap_items_arr); 511 err_trap_data_free: 512 kfree(nsim_trap_data); 513 return err; 514 } 515 516 static void nsim_dev_traps_exit(struct devlink *devlink) 517 { 518 struct nsim_dev *nsim_dev = devlink_priv(devlink); 519 520 cancel_delayed_work_sync(&nsim_dev->trap_data->trap_report_dw); 521 devlink_traps_unregister(devlink, nsim_traps_arr, 522 ARRAY_SIZE(nsim_traps_arr)); 523 kfree(nsim_dev->trap_data->trap_items_arr); 524 kfree(nsim_dev->trap_data); 525 } 526 527 static int nsim_dev_reload_down(struct devlink *devlink, 528 struct netlink_ext_ack *extack) 529 { 530 return 0; 531 } 532 533 static int nsim_dev_reload_up(struct devlink *devlink, 534 struct netlink_ext_ack *extack) 535 { 536 enum nsim_resource_id res_ids[] = { 537 NSIM_RESOURCE_IPV4_FIB, NSIM_RESOURCE_IPV4_FIB_RULES, 538 NSIM_RESOURCE_IPV6_FIB, NSIM_RESOURCE_IPV6_FIB_RULES 539 }; 540 struct net *net = nsim_devlink_net(devlink); 541 int i; 542 543 for (i = 0; i < ARRAY_SIZE(res_ids); ++i) { 544 int err; 545 u64 val; 546 547 err = devlink_resource_size_get(devlink, res_ids[i], &val); 548 if (!err) { 549 err = nsim_fib_set_max(net, res_ids[i], val, extack); 550 if (err) 551 return err; 552 } 553 } 554 nsim_devlink_param_load_driverinit_values(devlink); 555 556 return 0; 557 } 558 559 #define NSIM_DEV_FLASH_SIZE 500000 560 #define NSIM_DEV_FLASH_CHUNK_SIZE 1000 561 #define NSIM_DEV_FLASH_CHUNK_TIME_MS 10 562 563 static int nsim_dev_flash_update(struct devlink *devlink, const char *file_name, 564 const char *component, 565 struct netlink_ext_ack *extack) 566 { 567 struct nsim_dev *nsim_dev = devlink_priv(devlink); 568 int i; 569 570 if (nsim_dev->fw_update_status) { 571 devlink_flash_update_begin_notify(devlink); 572 devlink_flash_update_status_notify(devlink, 573 "Preparing to flash", 574 component, 0, 0); 575 } 576 577 for (i = 0; i < NSIM_DEV_FLASH_SIZE / NSIM_DEV_FLASH_CHUNK_SIZE; i++) { 578 if (nsim_dev->fw_update_status) 579 devlink_flash_update_status_notify(devlink, "Flashing", 580 component, 581 i * NSIM_DEV_FLASH_CHUNK_SIZE, 582 NSIM_DEV_FLASH_SIZE); 583 msleep(NSIM_DEV_FLASH_CHUNK_TIME_MS); 584 } 585 586 if (nsim_dev->fw_update_status) { 587 devlink_flash_update_status_notify(devlink, "Flashing", 588 component, 589 NSIM_DEV_FLASH_SIZE, 590 NSIM_DEV_FLASH_SIZE); 591 devlink_flash_update_status_notify(devlink, "Flashing done", 592 component, 0, 0); 593 devlink_flash_update_end_notify(devlink); 594 } 595 596 return 0; 597 } 598 599 static struct nsim_trap_item * 600 nsim_dev_trap_item_lookup(struct nsim_dev *nsim_dev, u16 trap_id) 601 { 602 struct nsim_trap_data *nsim_trap_data = nsim_dev->trap_data; 603 int i; 604 605 for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) { 606 if (nsim_traps_arr[i].id == trap_id) 607 return &nsim_trap_data->trap_items_arr[i]; 608 } 609 610 return NULL; 611 } 612 613 static int nsim_dev_devlink_trap_init(struct devlink *devlink, 614 const struct devlink_trap *trap, 615 void *trap_ctx) 616 { 617 struct nsim_dev *nsim_dev = devlink_priv(devlink); 618 struct nsim_trap_item *nsim_trap_item; 619 620 nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id); 621 if (WARN_ON(!nsim_trap_item)) 622 return -ENOENT; 623 624 nsim_trap_item->trap_ctx = trap_ctx; 625 nsim_trap_item->action = trap->init_action; 626 627 return 0; 628 } 629 630 static int 631 nsim_dev_devlink_trap_action_set(struct devlink *devlink, 632 const struct devlink_trap *trap, 633 enum devlink_trap_action action) 634 { 635 struct nsim_dev *nsim_dev = devlink_priv(devlink); 636 struct nsim_trap_item *nsim_trap_item; 637 638 nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id); 639 if (WARN_ON(!nsim_trap_item)) 640 return -ENOENT; 641 642 spin_lock(&nsim_dev->trap_data->trap_lock); 643 nsim_trap_item->action = action; 644 spin_unlock(&nsim_dev->trap_data->trap_lock); 645 646 return 0; 647 } 648 649 static const struct devlink_ops nsim_dev_devlink_ops = { 650 .reload_down = nsim_dev_reload_down, 651 .reload_up = nsim_dev_reload_up, 652 .flash_update = nsim_dev_flash_update, 653 .trap_init = nsim_dev_devlink_trap_init, 654 .trap_action_set = nsim_dev_devlink_trap_action_set, 655 }; 656 657 #define NSIM_DEV_MAX_MACS_DEFAULT 32 658 #define NSIM_DEV_TEST1_DEFAULT true 659 660 static struct nsim_dev * 661 nsim_dev_create(struct nsim_bus_dev *nsim_bus_dev, unsigned int port_count) 662 { 663 struct nsim_dev *nsim_dev; 664 struct devlink *devlink; 665 int err; 666 667 devlink = devlink_alloc(&nsim_dev_devlink_ops, sizeof(*nsim_dev)); 668 if (!devlink) 669 return ERR_PTR(-ENOMEM); 670 nsim_dev = devlink_priv(devlink); 671 nsim_dev->nsim_bus_dev = nsim_bus_dev; 672 nsim_dev->switch_id.id_len = sizeof(nsim_dev->switch_id.id); 673 get_random_bytes(nsim_dev->switch_id.id, nsim_dev->switch_id.id_len); 674 INIT_LIST_HEAD(&nsim_dev->port_list); 675 mutex_init(&nsim_dev->port_list_lock); 676 nsim_dev->fw_update_status = true; 677 nsim_dev->max_macs = NSIM_DEV_MAX_MACS_DEFAULT; 678 nsim_dev->test1 = NSIM_DEV_TEST1_DEFAULT; 679 680 err = nsim_dev_resources_register(devlink); 681 if (err) 682 goto err_devlink_free; 683 684 err = devlink_register(devlink, &nsim_bus_dev->dev); 685 if (err) 686 goto err_resources_unregister; 687 688 err = devlink_params_register(devlink, nsim_devlink_params, 689 ARRAY_SIZE(nsim_devlink_params)); 690 if (err) 691 goto err_dl_unregister; 692 nsim_devlink_set_params_init_values(nsim_dev, devlink); 693 694 err = nsim_dev_dummy_region_init(nsim_dev, devlink); 695 if (err) 696 goto err_params_unregister; 697 698 err = nsim_dev_traps_init(devlink); 699 if (err) 700 goto err_dummy_region_exit; 701 702 err = nsim_dev_debugfs_init(nsim_dev); 703 if (err) 704 goto err_traps_exit; 705 706 err = nsim_bpf_dev_init(nsim_dev); 707 if (err) 708 goto err_debugfs_exit; 709 710 devlink_params_publish(devlink); 711 return nsim_dev; 712 713 err_debugfs_exit: 714 nsim_dev_debugfs_exit(nsim_dev); 715 err_traps_exit: 716 nsim_dev_traps_exit(devlink); 717 err_dummy_region_exit: 718 nsim_dev_dummy_region_exit(nsim_dev); 719 err_params_unregister: 720 devlink_params_unregister(devlink, nsim_devlink_params, 721 ARRAY_SIZE(nsim_devlink_params)); 722 err_dl_unregister: 723 devlink_unregister(devlink); 724 err_resources_unregister: 725 devlink_resources_unregister(devlink, NULL); 726 err_devlink_free: 727 devlink_free(devlink); 728 return ERR_PTR(err); 729 } 730 731 static void nsim_dev_destroy(struct nsim_dev *nsim_dev) 732 { 733 struct devlink *devlink = priv_to_devlink(nsim_dev); 734 735 nsim_bpf_dev_exit(nsim_dev); 736 nsim_dev_debugfs_exit(nsim_dev); 737 nsim_dev_traps_exit(devlink); 738 nsim_dev_dummy_region_exit(nsim_dev); 739 devlink_params_unregister(devlink, nsim_devlink_params, 740 ARRAY_SIZE(nsim_devlink_params)); 741 devlink_unregister(devlink); 742 devlink_resources_unregister(devlink, NULL); 743 mutex_destroy(&nsim_dev->port_list_lock); 744 devlink_free(devlink); 745 } 746 747 static int __nsim_dev_port_add(struct nsim_dev *nsim_dev, 748 unsigned int port_index) 749 { 750 struct nsim_dev_port *nsim_dev_port; 751 struct devlink_port *devlink_port; 752 int err; 753 754 nsim_dev_port = kzalloc(sizeof(*nsim_dev_port), GFP_KERNEL); 755 if (!nsim_dev_port) 756 return -ENOMEM; 757 nsim_dev_port->port_index = port_index; 758 759 devlink_port = &nsim_dev_port->devlink_port; 760 devlink_port_attrs_set(devlink_port, DEVLINK_PORT_FLAVOUR_PHYSICAL, 761 port_index + 1, 0, 0, 762 nsim_dev->switch_id.id, 763 nsim_dev->switch_id.id_len); 764 err = devlink_port_register(priv_to_devlink(nsim_dev), devlink_port, 765 port_index); 766 if (err) 767 goto err_port_free; 768 769 err = nsim_dev_port_debugfs_init(nsim_dev, nsim_dev_port); 770 if (err) 771 goto err_dl_port_unregister; 772 773 nsim_dev_port->ns = nsim_create(nsim_dev, nsim_dev_port); 774 if (IS_ERR(nsim_dev_port->ns)) { 775 err = PTR_ERR(nsim_dev_port->ns); 776 goto err_port_debugfs_exit; 777 } 778 779 devlink_port_type_eth_set(devlink_port, nsim_dev_port->ns->netdev); 780 list_add(&nsim_dev_port->list, &nsim_dev->port_list); 781 782 return 0; 783 784 err_port_debugfs_exit: 785 nsim_dev_port_debugfs_exit(nsim_dev_port); 786 err_dl_port_unregister: 787 devlink_port_unregister(devlink_port); 788 err_port_free: 789 kfree(nsim_dev_port); 790 return err; 791 } 792 793 static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port) 794 { 795 struct devlink_port *devlink_port = &nsim_dev_port->devlink_port; 796 797 list_del(&nsim_dev_port->list); 798 devlink_port_type_clear(devlink_port); 799 nsim_destroy(nsim_dev_port->ns); 800 nsim_dev_port_debugfs_exit(nsim_dev_port); 801 devlink_port_unregister(devlink_port); 802 kfree(nsim_dev_port); 803 } 804 805 static void nsim_dev_port_del_all(struct nsim_dev *nsim_dev) 806 { 807 struct nsim_dev_port *nsim_dev_port, *tmp; 808 809 list_for_each_entry_safe(nsim_dev_port, tmp, 810 &nsim_dev->port_list, list) 811 __nsim_dev_port_del(nsim_dev_port); 812 } 813 814 int nsim_dev_probe(struct nsim_bus_dev *nsim_bus_dev) 815 { 816 struct nsim_dev *nsim_dev; 817 int i; 818 int err; 819 820 nsim_dev = nsim_dev_create(nsim_bus_dev, nsim_bus_dev->port_count); 821 if (IS_ERR(nsim_dev)) 822 return PTR_ERR(nsim_dev); 823 dev_set_drvdata(&nsim_bus_dev->dev, nsim_dev); 824 825 for (i = 0; i < nsim_bus_dev->port_count; i++) { 826 err = __nsim_dev_port_add(nsim_dev, i); 827 if (err) 828 goto err_port_del_all; 829 } 830 return 0; 831 832 err_port_del_all: 833 nsim_dev_port_del_all(nsim_dev); 834 nsim_dev_destroy(nsim_dev); 835 return err; 836 } 837 838 void nsim_dev_remove(struct nsim_bus_dev *nsim_bus_dev) 839 { 840 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); 841 842 nsim_dev_port_del_all(nsim_dev); 843 nsim_dev_destroy(nsim_dev); 844 } 845 846 static struct nsim_dev_port * 847 __nsim_dev_port_lookup(struct nsim_dev *nsim_dev, unsigned int port_index) 848 { 849 struct nsim_dev_port *nsim_dev_port; 850 851 list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list) 852 if (nsim_dev_port->port_index == port_index) 853 return nsim_dev_port; 854 return NULL; 855 } 856 857 int nsim_dev_port_add(struct nsim_bus_dev *nsim_bus_dev, 858 unsigned int port_index) 859 { 860 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); 861 int err; 862 863 mutex_lock(&nsim_dev->port_list_lock); 864 if (__nsim_dev_port_lookup(nsim_dev, port_index)) 865 err = -EEXIST; 866 else 867 err = __nsim_dev_port_add(nsim_dev, port_index); 868 mutex_unlock(&nsim_dev->port_list_lock); 869 return err; 870 } 871 872 int nsim_dev_port_del(struct nsim_bus_dev *nsim_bus_dev, 873 unsigned int port_index) 874 { 875 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); 876 struct nsim_dev_port *nsim_dev_port; 877 int err = 0; 878 879 mutex_lock(&nsim_dev->port_list_lock); 880 nsim_dev_port = __nsim_dev_port_lookup(nsim_dev, port_index); 881 if (!nsim_dev_port) 882 err = -ENOENT; 883 else 884 __nsim_dev_port_del(nsim_dev_port); 885 mutex_unlock(&nsim_dev->port_list_lock); 886 return err; 887 } 888 889 int nsim_dev_init(void) 890 { 891 nsim_dev_ddir = debugfs_create_dir(DRV_NAME, NULL); 892 if (IS_ERR_OR_NULL(nsim_dev_ddir)) 893 return -ENOMEM; 894 return 0; 895 } 896 897 void nsim_dev_exit(void) 898 { 899 debugfs_remove_recursive(nsim_dev_ddir); 900 } 901