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 unsigned int 39 nsim_dev_port_index(enum nsim_dev_port_type type, unsigned int port_index) 40 { 41 switch (type) { 42 case NSIM_DEV_PORT_TYPE_VF: 43 port_index = NSIM_DEV_VF_PORT_INDEX_BASE + port_index; 44 break; 45 case NSIM_DEV_PORT_TYPE_PF: 46 break; 47 } 48 49 return port_index; 50 } 51 52 static inline unsigned int nsim_dev_port_index_to_vf_index(unsigned int port_index) 53 { 54 return port_index - NSIM_DEV_VF_PORT_INDEX_BASE; 55 } 56 57 static struct dentry *nsim_dev_ddir; 58 59 unsigned int nsim_dev_get_vfs(struct nsim_dev *nsim_dev) 60 { 61 WARN_ON(!lockdep_rtnl_is_held() && 62 !devl_lock_is_held(priv_to_devlink(nsim_dev))); 63 64 return nsim_dev->nsim_bus_dev->num_vfs; 65 } 66 67 static void 68 nsim_bus_dev_set_vfs(struct nsim_bus_dev *nsim_bus_dev, unsigned int num_vfs) 69 { 70 rtnl_lock(); 71 nsim_bus_dev->num_vfs = num_vfs; 72 rtnl_unlock(); 73 } 74 75 #define NSIM_DEV_DUMMY_REGION_SIZE (1024 * 32) 76 77 static int 78 nsim_dev_take_snapshot(struct devlink *devlink, 79 const struct devlink_region_ops *ops, 80 struct netlink_ext_ack *extack, 81 u8 **data) 82 { 83 void *dummy_data; 84 85 dummy_data = kmalloc(NSIM_DEV_DUMMY_REGION_SIZE, GFP_KERNEL); 86 if (!dummy_data) 87 return -ENOMEM; 88 89 get_random_bytes(dummy_data, NSIM_DEV_DUMMY_REGION_SIZE); 90 91 *data = dummy_data; 92 93 return 0; 94 } 95 96 static ssize_t nsim_dev_take_snapshot_write(struct file *file, 97 const char __user *data, 98 size_t count, loff_t *ppos) 99 { 100 struct nsim_dev *nsim_dev = file->private_data; 101 struct devlink *devlink; 102 u8 *dummy_data; 103 int err; 104 u32 id; 105 106 devlink = priv_to_devlink(nsim_dev); 107 108 err = nsim_dev_take_snapshot(devlink, NULL, NULL, &dummy_data); 109 if (err) 110 return err; 111 112 err = devlink_region_snapshot_id_get(devlink, &id); 113 if (err) { 114 pr_err("Failed to get snapshot id\n"); 115 kfree(dummy_data); 116 return err; 117 } 118 err = devlink_region_snapshot_create(nsim_dev->dummy_region, 119 dummy_data, id); 120 devlink_region_snapshot_id_put(devlink, id); 121 if (err) { 122 pr_err("Failed to create region snapshot\n"); 123 kfree(dummy_data); 124 return err; 125 } 126 127 return count; 128 } 129 130 static const struct file_operations nsim_dev_take_snapshot_fops = { 131 .open = simple_open, 132 .write = nsim_dev_take_snapshot_write, 133 .llseek = generic_file_llseek, 134 .owner = THIS_MODULE, 135 }; 136 137 static ssize_t nsim_dev_trap_fa_cookie_read(struct file *file, 138 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 unsigned int buf_len; 144 ssize_t ret; 145 char *buf; 146 147 spin_lock(&nsim_dev->fa_cookie_lock); 148 fa_cookie = nsim_dev->fa_cookie; 149 if (!fa_cookie) { 150 ret = -EINVAL; 151 goto errout; 152 } 153 buf_len = fa_cookie->cookie_len * 2; 154 buf = kmalloc(buf_len, GFP_ATOMIC); 155 if (!buf) { 156 ret = -ENOMEM; 157 goto errout; 158 } 159 bin2hex(buf, fa_cookie->cookie, fa_cookie->cookie_len); 160 spin_unlock(&nsim_dev->fa_cookie_lock); 161 162 ret = simple_read_from_buffer(data, count, ppos, buf, buf_len); 163 164 kfree(buf); 165 return ret; 166 167 errout: 168 spin_unlock(&nsim_dev->fa_cookie_lock); 169 return ret; 170 } 171 172 static ssize_t nsim_dev_trap_fa_cookie_write(struct file *file, 173 const char __user *data, 174 size_t count, loff_t *ppos) 175 { 176 struct nsim_dev *nsim_dev = file->private_data; 177 struct flow_action_cookie *fa_cookie; 178 size_t cookie_len; 179 ssize_t ret; 180 char *buf; 181 182 if (*ppos != 0) 183 return -EINVAL; 184 cookie_len = (count - 1) / 2; 185 if ((count - 1) % 2) 186 return -EINVAL; 187 188 buf = memdup_user(data, count); 189 if (IS_ERR(buf)) 190 return PTR_ERR(buf); 191 192 fa_cookie = kmalloc(sizeof(*fa_cookie) + cookie_len, 193 GFP_KERNEL | __GFP_NOWARN); 194 if (!fa_cookie) { 195 ret = -ENOMEM; 196 goto free_buf; 197 } 198 199 fa_cookie->cookie_len = cookie_len; 200 ret = hex2bin(fa_cookie->cookie, buf, cookie_len); 201 if (ret) 202 goto free_fa_cookie; 203 kfree(buf); 204 205 spin_lock(&nsim_dev->fa_cookie_lock); 206 kfree(nsim_dev->fa_cookie); 207 nsim_dev->fa_cookie = fa_cookie; 208 spin_unlock(&nsim_dev->fa_cookie_lock); 209 210 return count; 211 212 free_fa_cookie: 213 kfree(fa_cookie); 214 free_buf: 215 kfree(buf); 216 return ret; 217 } 218 219 static const struct file_operations nsim_dev_trap_fa_cookie_fops = { 220 .open = simple_open, 221 .read = nsim_dev_trap_fa_cookie_read, 222 .write = nsim_dev_trap_fa_cookie_write, 223 .llseek = generic_file_llseek, 224 .owner = THIS_MODULE, 225 }; 226 227 static ssize_t nsim_bus_dev_max_vfs_read(struct file *file, char __user *data, 228 size_t count, loff_t *ppos) 229 { 230 struct nsim_dev *nsim_dev = file->private_data; 231 char buf[11]; 232 ssize_t len; 233 234 len = scnprintf(buf, sizeof(buf), "%u\n", 235 READ_ONCE(nsim_dev->nsim_bus_dev->max_vfs)); 236 237 return simple_read_from_buffer(data, count, ppos, buf, len); 238 } 239 240 static ssize_t nsim_bus_dev_max_vfs_write(struct file *file, 241 const char __user *data, 242 size_t count, loff_t *ppos) 243 { 244 struct nsim_vf_config *vfconfigs; 245 struct nsim_dev *nsim_dev; 246 char buf[10]; 247 ssize_t ret; 248 u32 val; 249 250 if (*ppos != 0) 251 return 0; 252 253 if (count >= sizeof(buf)) 254 return -ENOSPC; 255 256 ret = copy_from_user(buf, data, count); 257 if (ret) 258 return -EFAULT; 259 buf[count] = '\0'; 260 261 ret = kstrtouint(buf, 10, &val); 262 if (ret) 263 return -EINVAL; 264 265 /* max_vfs limited by the maximum number of provided port indexes */ 266 if (val > NSIM_DEV_VF_PORT_INDEX_MAX - NSIM_DEV_VF_PORT_INDEX_BASE) 267 return -ERANGE; 268 269 vfconfigs = kcalloc(val, sizeof(struct nsim_vf_config), 270 GFP_KERNEL | __GFP_NOWARN); 271 if (!vfconfigs) 272 return -ENOMEM; 273 274 nsim_dev = file->private_data; 275 devl_lock(priv_to_devlink(nsim_dev)); 276 /* Reject if VFs are configured */ 277 if (nsim_dev_get_vfs(nsim_dev)) { 278 ret = -EBUSY; 279 } else { 280 swap(nsim_dev->vfconfigs, vfconfigs); 281 WRITE_ONCE(nsim_dev->nsim_bus_dev->max_vfs, val); 282 *ppos += count; 283 ret = count; 284 } 285 devl_unlock(priv_to_devlink(nsim_dev)); 286 287 kfree(vfconfigs); 288 return ret; 289 } 290 291 static const struct file_operations nsim_dev_max_vfs_fops = { 292 .open = simple_open, 293 .read = nsim_bus_dev_max_vfs_read, 294 .write = nsim_bus_dev_max_vfs_write, 295 .llseek = generic_file_llseek, 296 .owner = THIS_MODULE, 297 }; 298 299 static int nsim_dev_debugfs_init(struct nsim_dev *nsim_dev) 300 { 301 char dev_ddir_name[sizeof(DRV_NAME) + 10]; 302 int err; 303 304 sprintf(dev_ddir_name, DRV_NAME "%u", nsim_dev->nsim_bus_dev->dev.id); 305 nsim_dev->ddir = debugfs_create_dir(dev_ddir_name, nsim_dev_ddir); 306 if (IS_ERR(nsim_dev->ddir)) 307 return PTR_ERR(nsim_dev->ddir); 308 nsim_dev->ports_ddir = debugfs_create_dir("ports", nsim_dev->ddir); 309 if (IS_ERR(nsim_dev->ports_ddir)) { 310 err = PTR_ERR(nsim_dev->ports_ddir); 311 goto err_ddir; 312 } 313 debugfs_create_bool("fw_update_status", 0600, nsim_dev->ddir, 314 &nsim_dev->fw_update_status); 315 debugfs_create_u32("fw_update_overwrite_mask", 0600, nsim_dev->ddir, 316 &nsim_dev->fw_update_overwrite_mask); 317 debugfs_create_u32("max_macs", 0600, nsim_dev->ddir, 318 &nsim_dev->max_macs); 319 debugfs_create_bool("test1", 0600, nsim_dev->ddir, 320 &nsim_dev->test1); 321 nsim_dev->take_snapshot = debugfs_create_file("take_snapshot", 322 0200, 323 nsim_dev->ddir, 324 nsim_dev, 325 &nsim_dev_take_snapshot_fops); 326 debugfs_create_bool("dont_allow_reload", 0600, nsim_dev->ddir, 327 &nsim_dev->dont_allow_reload); 328 debugfs_create_bool("fail_reload", 0600, nsim_dev->ddir, 329 &nsim_dev->fail_reload); 330 debugfs_create_file("trap_flow_action_cookie", 0600, nsim_dev->ddir, 331 nsim_dev, &nsim_dev_trap_fa_cookie_fops); 332 debugfs_create_bool("fail_trap_group_set", 0600, 333 nsim_dev->ddir, 334 &nsim_dev->fail_trap_group_set); 335 debugfs_create_bool("fail_trap_policer_set", 0600, 336 nsim_dev->ddir, 337 &nsim_dev->fail_trap_policer_set); 338 debugfs_create_bool("fail_trap_policer_counter_get", 0600, 339 nsim_dev->ddir, 340 &nsim_dev->fail_trap_policer_counter_get); 341 /* caution, dev_max_vfs write takes devlink lock */ 342 debugfs_create_file("max_vfs", 0600, nsim_dev->ddir, 343 nsim_dev, &nsim_dev_max_vfs_fops); 344 345 nsim_dev->nodes_ddir = debugfs_create_dir("rate_nodes", nsim_dev->ddir); 346 if (IS_ERR(nsim_dev->nodes_ddir)) { 347 err = PTR_ERR(nsim_dev->nodes_ddir); 348 goto err_ports_ddir; 349 } 350 debugfs_create_bool("fail_trap_drop_counter_get", 0600, 351 nsim_dev->ddir, 352 &nsim_dev->fail_trap_drop_counter_get); 353 nsim_udp_tunnels_debugfs_create(nsim_dev); 354 return 0; 355 356 err_ports_ddir: 357 debugfs_remove_recursive(nsim_dev->ports_ddir); 358 err_ddir: 359 debugfs_remove_recursive(nsim_dev->ddir); 360 return err; 361 } 362 363 static void nsim_dev_debugfs_exit(struct nsim_dev *nsim_dev) 364 { 365 debugfs_remove_recursive(nsim_dev->nodes_ddir); 366 debugfs_remove_recursive(nsim_dev->ports_ddir); 367 debugfs_remove_recursive(nsim_dev->ddir); 368 } 369 370 static ssize_t nsim_dev_rate_parent_read(struct file *file, 371 char __user *data, 372 size_t count, loff_t *ppos) 373 { 374 char **name_ptr = file->private_data; 375 size_t len; 376 377 if (!*name_ptr) 378 return 0; 379 380 len = strlen(*name_ptr); 381 return simple_read_from_buffer(data, count, ppos, *name_ptr, len); 382 } 383 384 static const struct file_operations nsim_dev_rate_parent_fops = { 385 .open = simple_open, 386 .read = nsim_dev_rate_parent_read, 387 .llseek = generic_file_llseek, 388 .owner = THIS_MODULE, 389 }; 390 391 static int nsim_dev_port_debugfs_init(struct nsim_dev *nsim_dev, 392 struct nsim_dev_port *nsim_dev_port) 393 { 394 struct nsim_bus_dev *nsim_bus_dev = nsim_dev->nsim_bus_dev; 395 unsigned int port_index = nsim_dev_port->port_index; 396 char port_ddir_name[16]; 397 char dev_link_name[32]; 398 399 sprintf(port_ddir_name, "%u", port_index); 400 nsim_dev_port->ddir = debugfs_create_dir(port_ddir_name, 401 nsim_dev->ports_ddir); 402 if (IS_ERR(nsim_dev_port->ddir)) 403 return PTR_ERR(nsim_dev_port->ddir); 404 405 sprintf(dev_link_name, "../../../" DRV_NAME "%u", nsim_bus_dev->dev.id); 406 if (nsim_dev_port_is_vf(nsim_dev_port)) { 407 unsigned int vf_id = nsim_dev_port_index_to_vf_index(port_index); 408 409 debugfs_create_u16("tx_share", 0400, nsim_dev_port->ddir, 410 &nsim_dev->vfconfigs[vf_id].min_tx_rate); 411 debugfs_create_u16("tx_max", 0400, nsim_dev_port->ddir, 412 &nsim_dev->vfconfigs[vf_id].max_tx_rate); 413 nsim_dev_port->rate_parent = debugfs_create_file("rate_parent", 414 0400, 415 nsim_dev_port->ddir, 416 &nsim_dev_port->parent_name, 417 &nsim_dev_rate_parent_fops); 418 } 419 debugfs_create_symlink("dev", nsim_dev_port->ddir, dev_link_name); 420 421 return 0; 422 } 423 424 static void nsim_dev_port_debugfs_exit(struct nsim_dev_port *nsim_dev_port) 425 { 426 debugfs_remove_recursive(nsim_dev_port->ddir); 427 } 428 429 static int nsim_dev_resources_register(struct devlink *devlink) 430 { 431 struct devlink_resource_size_params params = { 432 .size_max = (u64)-1, 433 .size_granularity = 1, 434 .unit = DEVLINK_RESOURCE_UNIT_ENTRY 435 }; 436 int err; 437 438 /* Resources for IPv4 */ 439 err = devl_resource_register(devlink, "IPv4", (u64)-1, 440 NSIM_RESOURCE_IPV4, 441 DEVLINK_RESOURCE_ID_PARENT_TOP, 442 ¶ms); 443 if (err) { 444 pr_err("Failed to register IPv4 top resource\n"); 445 goto err_out; 446 } 447 448 err = devl_resource_register(devlink, "fib", (u64)-1, 449 NSIM_RESOURCE_IPV4_FIB, 450 NSIM_RESOURCE_IPV4, ¶ms); 451 if (err) { 452 pr_err("Failed to register IPv4 FIB resource\n"); 453 goto err_out; 454 } 455 456 err = devl_resource_register(devlink, "fib-rules", (u64)-1, 457 NSIM_RESOURCE_IPV4_FIB_RULES, 458 NSIM_RESOURCE_IPV4, ¶ms); 459 if (err) { 460 pr_err("Failed to register IPv4 FIB rules resource\n"); 461 goto err_out; 462 } 463 464 /* Resources for IPv6 */ 465 err = devl_resource_register(devlink, "IPv6", (u64)-1, 466 NSIM_RESOURCE_IPV6, 467 DEVLINK_RESOURCE_ID_PARENT_TOP, 468 ¶ms); 469 if (err) { 470 pr_err("Failed to register IPv6 top resource\n"); 471 goto err_out; 472 } 473 474 err = devl_resource_register(devlink, "fib", (u64)-1, 475 NSIM_RESOURCE_IPV6_FIB, 476 NSIM_RESOURCE_IPV6, ¶ms); 477 if (err) { 478 pr_err("Failed to register IPv6 FIB resource\n"); 479 goto err_out; 480 } 481 482 err = devl_resource_register(devlink, "fib-rules", (u64)-1, 483 NSIM_RESOURCE_IPV6_FIB_RULES, 484 NSIM_RESOURCE_IPV6, ¶ms); 485 if (err) { 486 pr_err("Failed to register IPv6 FIB rules resource\n"); 487 goto err_out; 488 } 489 490 /* Resources for nexthops */ 491 err = devl_resource_register(devlink, "nexthops", (u64)-1, 492 NSIM_RESOURCE_NEXTHOPS, 493 DEVLINK_RESOURCE_ID_PARENT_TOP, 494 ¶ms); 495 if (err) { 496 pr_err("Failed to register NEXTHOPS resource\n"); 497 goto err_out; 498 } 499 return 0; 500 501 err_out: 502 devl_resources_unregister(devlink); 503 return err; 504 } 505 506 enum nsim_devlink_param_id { 507 NSIM_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX, 508 NSIM_DEVLINK_PARAM_ID_TEST1, 509 }; 510 511 static const struct devlink_param nsim_devlink_params[] = { 512 DEVLINK_PARAM_GENERIC(MAX_MACS, 513 BIT(DEVLINK_PARAM_CMODE_DRIVERINIT), 514 NULL, NULL, NULL), 515 DEVLINK_PARAM_DRIVER(NSIM_DEVLINK_PARAM_ID_TEST1, 516 "test1", DEVLINK_PARAM_TYPE_BOOL, 517 BIT(DEVLINK_PARAM_CMODE_DRIVERINIT), 518 NULL, NULL, NULL), 519 }; 520 521 static void nsim_devlink_set_params_init_values(struct nsim_dev *nsim_dev, 522 struct devlink *devlink) 523 { 524 union devlink_param_value value; 525 526 value.vu32 = nsim_dev->max_macs; 527 devl_param_driverinit_value_set(devlink, 528 DEVLINK_PARAM_GENERIC_ID_MAX_MACS, 529 value); 530 value.vbool = nsim_dev->test1; 531 devl_param_driverinit_value_set(devlink, 532 NSIM_DEVLINK_PARAM_ID_TEST1, 533 value); 534 } 535 536 static void nsim_devlink_param_load_driverinit_values(struct devlink *devlink) 537 { 538 struct nsim_dev *nsim_dev = devlink_priv(devlink); 539 union devlink_param_value saved_value; 540 int err; 541 542 err = devl_param_driverinit_value_get(devlink, 543 DEVLINK_PARAM_GENERIC_ID_MAX_MACS, 544 &saved_value); 545 if (!err) 546 nsim_dev->max_macs = saved_value.vu32; 547 err = devl_param_driverinit_value_get(devlink, 548 NSIM_DEVLINK_PARAM_ID_TEST1, 549 &saved_value); 550 if (!err) 551 nsim_dev->test1 = saved_value.vbool; 552 } 553 554 #define NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX 16 555 556 static const struct devlink_region_ops dummy_region_ops = { 557 .name = "dummy", 558 .destructor = &kfree, 559 .snapshot = nsim_dev_take_snapshot, 560 }; 561 562 static int nsim_dev_dummy_region_init(struct nsim_dev *nsim_dev, 563 struct devlink *devlink) 564 { 565 nsim_dev->dummy_region = 566 devl_region_create(devlink, &dummy_region_ops, 567 NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX, 568 NSIM_DEV_DUMMY_REGION_SIZE); 569 return PTR_ERR_OR_ZERO(nsim_dev->dummy_region); 570 } 571 572 static void nsim_dev_dummy_region_exit(struct nsim_dev *nsim_dev) 573 { 574 devl_region_destroy(nsim_dev->dummy_region); 575 } 576 577 static int 578 __nsim_dev_port_add(struct nsim_dev *nsim_dev, enum nsim_dev_port_type type, 579 unsigned int port_index); 580 static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port); 581 582 static int nsim_esw_legacy_enable(struct nsim_dev *nsim_dev, 583 struct netlink_ext_ack *extack) 584 { 585 struct devlink *devlink = priv_to_devlink(nsim_dev); 586 struct nsim_dev_port *nsim_dev_port, *tmp; 587 588 devl_rate_nodes_destroy(devlink); 589 list_for_each_entry_safe(nsim_dev_port, tmp, &nsim_dev->port_list, list) 590 if (nsim_dev_port_is_vf(nsim_dev_port)) 591 __nsim_dev_port_del(nsim_dev_port); 592 nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_LEGACY; 593 return 0; 594 } 595 596 static int nsim_esw_switchdev_enable(struct nsim_dev *nsim_dev, 597 struct netlink_ext_ack *extack) 598 { 599 struct nsim_dev_port *nsim_dev_port, *tmp; 600 int i, err; 601 602 for (i = 0; i < nsim_dev_get_vfs(nsim_dev); i++) { 603 err = __nsim_dev_port_add(nsim_dev, NSIM_DEV_PORT_TYPE_VF, i); 604 if (err) { 605 NL_SET_ERR_MSG_MOD(extack, "Failed to initialize VFs' netdevsim ports"); 606 pr_err("Failed to initialize VF id=%d. %d.\n", i, err); 607 goto err_port_add_vfs; 608 } 609 } 610 nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_SWITCHDEV; 611 return 0; 612 613 err_port_add_vfs: 614 list_for_each_entry_safe(nsim_dev_port, tmp, &nsim_dev->port_list, list) 615 if (nsim_dev_port_is_vf(nsim_dev_port)) 616 __nsim_dev_port_del(nsim_dev_port); 617 return err; 618 } 619 620 static int nsim_devlink_eswitch_mode_set(struct devlink *devlink, u16 mode, 621 struct netlink_ext_ack *extack) 622 { 623 struct nsim_dev *nsim_dev = devlink_priv(devlink); 624 625 if (mode == nsim_dev->esw_mode) 626 return 0; 627 628 if (mode == DEVLINK_ESWITCH_MODE_LEGACY) 629 return nsim_esw_legacy_enable(nsim_dev, extack); 630 if (mode == DEVLINK_ESWITCH_MODE_SWITCHDEV) 631 return nsim_esw_switchdev_enable(nsim_dev, extack); 632 633 return -EINVAL; 634 } 635 636 static int nsim_devlink_eswitch_mode_get(struct devlink *devlink, u16 *mode) 637 { 638 struct nsim_dev *nsim_dev = devlink_priv(devlink); 639 640 *mode = nsim_dev->esw_mode; 641 return 0; 642 } 643 644 struct nsim_trap_item { 645 void *trap_ctx; 646 enum devlink_trap_action action; 647 }; 648 649 struct nsim_trap_data { 650 struct delayed_work trap_report_dw; 651 struct nsim_trap_item *trap_items_arr; 652 u64 *trap_policers_cnt_arr; 653 u64 trap_pkt_cnt; 654 struct nsim_dev *nsim_dev; 655 spinlock_t trap_lock; /* Protects trap_items_arr */ 656 }; 657 658 /* All driver-specific traps must be documented in 659 * Documentation/networking/devlink/netdevsim.rst 660 */ 661 enum { 662 NSIM_TRAP_ID_BASE = DEVLINK_TRAP_GENERIC_ID_MAX, 663 NSIM_TRAP_ID_FID_MISS, 664 }; 665 666 #define NSIM_TRAP_NAME_FID_MISS "fid_miss" 667 668 #define NSIM_TRAP_METADATA DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT 669 670 #define NSIM_TRAP_DROP(_id, _group_id) \ 671 DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \ 672 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ 673 NSIM_TRAP_METADATA) 674 #define NSIM_TRAP_DROP_EXT(_id, _group_id, _metadata) \ 675 DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \ 676 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ 677 NSIM_TRAP_METADATA | (_metadata)) 678 #define NSIM_TRAP_EXCEPTION(_id, _group_id) \ 679 DEVLINK_TRAP_GENERIC(EXCEPTION, TRAP, _id, \ 680 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ 681 NSIM_TRAP_METADATA) 682 #define NSIM_TRAP_CONTROL(_id, _group_id, _action) \ 683 DEVLINK_TRAP_GENERIC(CONTROL, _action, _id, \ 684 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ 685 NSIM_TRAP_METADATA) 686 #define NSIM_TRAP_DRIVER_EXCEPTION(_id, _group_id) \ 687 DEVLINK_TRAP_DRIVER(EXCEPTION, TRAP, NSIM_TRAP_ID_##_id, \ 688 NSIM_TRAP_NAME_##_id, \ 689 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ 690 NSIM_TRAP_METADATA) 691 692 #define NSIM_DEV_TRAP_POLICER_MIN_RATE 1 693 #define NSIM_DEV_TRAP_POLICER_MAX_RATE 8000 694 #define NSIM_DEV_TRAP_POLICER_MIN_BURST 8 695 #define NSIM_DEV_TRAP_POLICER_MAX_BURST 65536 696 697 #define NSIM_TRAP_POLICER(_id, _rate, _burst) \ 698 DEVLINK_TRAP_POLICER(_id, _rate, _burst, \ 699 NSIM_DEV_TRAP_POLICER_MAX_RATE, \ 700 NSIM_DEV_TRAP_POLICER_MIN_RATE, \ 701 NSIM_DEV_TRAP_POLICER_MAX_BURST, \ 702 NSIM_DEV_TRAP_POLICER_MIN_BURST) 703 704 static const struct devlink_trap_policer nsim_trap_policers_arr[] = { 705 NSIM_TRAP_POLICER(1, 1000, 128), 706 NSIM_TRAP_POLICER(2, 2000, 256), 707 NSIM_TRAP_POLICER(3, 3000, 512), 708 }; 709 710 static const struct devlink_trap_group nsim_trap_groups_arr[] = { 711 DEVLINK_TRAP_GROUP_GENERIC(L2_DROPS, 0), 712 DEVLINK_TRAP_GROUP_GENERIC(L3_DROPS, 1), 713 DEVLINK_TRAP_GROUP_GENERIC(L3_EXCEPTIONS, 1), 714 DEVLINK_TRAP_GROUP_GENERIC(BUFFER_DROPS, 2), 715 DEVLINK_TRAP_GROUP_GENERIC(ACL_DROPS, 3), 716 DEVLINK_TRAP_GROUP_GENERIC(MC_SNOOPING, 3), 717 }; 718 719 static const struct devlink_trap nsim_traps_arr[] = { 720 NSIM_TRAP_DROP(SMAC_MC, L2_DROPS), 721 NSIM_TRAP_DROP(VLAN_TAG_MISMATCH, L2_DROPS), 722 NSIM_TRAP_DROP(INGRESS_VLAN_FILTER, L2_DROPS), 723 NSIM_TRAP_DROP(INGRESS_STP_FILTER, L2_DROPS), 724 NSIM_TRAP_DROP(EMPTY_TX_LIST, L2_DROPS), 725 NSIM_TRAP_DROP(PORT_LOOPBACK_FILTER, L2_DROPS), 726 NSIM_TRAP_DRIVER_EXCEPTION(FID_MISS, L2_DROPS), 727 NSIM_TRAP_DROP(BLACKHOLE_ROUTE, L3_DROPS), 728 NSIM_TRAP_EXCEPTION(TTL_ERROR, L3_EXCEPTIONS), 729 NSIM_TRAP_DROP(TAIL_DROP, BUFFER_DROPS), 730 NSIM_TRAP_DROP_EXT(INGRESS_FLOW_ACTION_DROP, ACL_DROPS, 731 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE), 732 NSIM_TRAP_DROP_EXT(EGRESS_FLOW_ACTION_DROP, ACL_DROPS, 733 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE), 734 NSIM_TRAP_CONTROL(IGMP_QUERY, MC_SNOOPING, MIRROR), 735 NSIM_TRAP_CONTROL(IGMP_V1_REPORT, MC_SNOOPING, TRAP), 736 }; 737 738 #define NSIM_TRAP_L4_DATA_LEN 100 739 740 static struct sk_buff *nsim_dev_trap_skb_build(void) 741 { 742 int tot_len, data_len = NSIM_TRAP_L4_DATA_LEN; 743 struct sk_buff *skb; 744 struct udphdr *udph; 745 struct ethhdr *eth; 746 struct iphdr *iph; 747 748 skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); 749 if (!skb) 750 return NULL; 751 tot_len = sizeof(struct iphdr) + sizeof(struct udphdr) + data_len; 752 753 skb_reset_mac_header(skb); 754 eth = skb_put(skb, sizeof(struct ethhdr)); 755 eth_random_addr(eth->h_dest); 756 eth_random_addr(eth->h_source); 757 eth->h_proto = htons(ETH_P_IP); 758 skb->protocol = htons(ETH_P_IP); 759 760 skb_set_network_header(skb, skb->len); 761 iph = skb_put(skb, sizeof(struct iphdr)); 762 iph->protocol = IPPROTO_UDP; 763 iph->saddr = in_aton("192.0.2.1"); 764 iph->daddr = in_aton("198.51.100.1"); 765 iph->version = 0x4; 766 iph->frag_off = 0; 767 iph->ihl = 0x5; 768 iph->tot_len = htons(tot_len); 769 iph->ttl = 100; 770 iph->check = 0; 771 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl); 772 773 skb_set_transport_header(skb, skb->len); 774 udph = skb_put_zero(skb, sizeof(struct udphdr) + data_len); 775 get_random_bytes(&udph->source, sizeof(u16)); 776 get_random_bytes(&udph->dest, sizeof(u16)); 777 udph->len = htons(sizeof(struct udphdr) + data_len); 778 779 return skb; 780 } 781 782 static void nsim_dev_trap_report(struct nsim_dev_port *nsim_dev_port) 783 { 784 struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev; 785 struct devlink *devlink = priv_to_devlink(nsim_dev); 786 struct nsim_trap_data *nsim_trap_data; 787 int i; 788 789 nsim_trap_data = nsim_dev->trap_data; 790 791 spin_lock(&nsim_trap_data->trap_lock); 792 for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) { 793 struct flow_action_cookie *fa_cookie = NULL; 794 struct nsim_trap_item *nsim_trap_item; 795 struct sk_buff *skb; 796 bool has_fa_cookie; 797 798 has_fa_cookie = nsim_traps_arr[i].metadata_cap & 799 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE; 800 801 nsim_trap_item = &nsim_trap_data->trap_items_arr[i]; 802 if (nsim_trap_item->action == DEVLINK_TRAP_ACTION_DROP) 803 continue; 804 805 skb = nsim_dev_trap_skb_build(); 806 if (!skb) 807 continue; 808 skb->dev = nsim_dev_port->ns->netdev; 809 810 /* Trapped packets are usually passed to devlink in softIRQ, 811 * but in this case they are generated in a workqueue. Disable 812 * softIRQs to prevent lockdep from complaining about 813 * "incosistent lock state". 814 */ 815 816 spin_lock_bh(&nsim_dev->fa_cookie_lock); 817 fa_cookie = has_fa_cookie ? nsim_dev->fa_cookie : NULL; 818 devlink_trap_report(devlink, skb, nsim_trap_item->trap_ctx, 819 &nsim_dev_port->devlink_port, fa_cookie); 820 spin_unlock_bh(&nsim_dev->fa_cookie_lock); 821 consume_skb(skb); 822 } 823 spin_unlock(&nsim_trap_data->trap_lock); 824 } 825 826 #define NSIM_TRAP_REPORT_INTERVAL_MS 100 827 828 static void nsim_dev_trap_report_work(struct work_struct *work) 829 { 830 struct nsim_trap_data *nsim_trap_data; 831 struct nsim_dev_port *nsim_dev_port; 832 struct nsim_dev *nsim_dev; 833 834 nsim_trap_data = container_of(work, struct nsim_trap_data, 835 trap_report_dw.work); 836 nsim_dev = nsim_trap_data->nsim_dev; 837 838 if (!devl_trylock(priv_to_devlink(nsim_dev))) { 839 queue_delayed_work(system_unbound_wq, 840 &nsim_dev->trap_data->trap_report_dw, 1); 841 return; 842 } 843 844 /* For each running port and enabled packet trap, generate a UDP 845 * packet with a random 5-tuple and report it. 846 */ 847 list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list) { 848 if (!netif_running(nsim_dev_port->ns->netdev)) 849 continue; 850 851 nsim_dev_trap_report(nsim_dev_port); 852 cond_resched(); 853 } 854 devl_unlock(priv_to_devlink(nsim_dev)); 855 queue_delayed_work(system_unbound_wq, 856 &nsim_dev->trap_data->trap_report_dw, 857 msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS)); 858 } 859 860 static int nsim_dev_traps_init(struct devlink *devlink) 861 { 862 size_t policers_count = ARRAY_SIZE(nsim_trap_policers_arr); 863 struct nsim_dev *nsim_dev = devlink_priv(devlink); 864 struct nsim_trap_data *nsim_trap_data; 865 int err; 866 867 nsim_trap_data = kzalloc(sizeof(*nsim_trap_data), GFP_KERNEL); 868 if (!nsim_trap_data) 869 return -ENOMEM; 870 871 nsim_trap_data->trap_items_arr = kcalloc(ARRAY_SIZE(nsim_traps_arr), 872 sizeof(struct nsim_trap_item), 873 GFP_KERNEL); 874 if (!nsim_trap_data->trap_items_arr) { 875 err = -ENOMEM; 876 goto err_trap_data_free; 877 } 878 879 nsim_trap_data->trap_policers_cnt_arr = kcalloc(policers_count, 880 sizeof(u64), 881 GFP_KERNEL); 882 if (!nsim_trap_data->trap_policers_cnt_arr) { 883 err = -ENOMEM; 884 goto err_trap_items_free; 885 } 886 887 /* The lock is used to protect the action state of the registered 888 * traps. The value is written by user and read in delayed work when 889 * iterating over all the traps. 890 */ 891 spin_lock_init(&nsim_trap_data->trap_lock); 892 nsim_trap_data->nsim_dev = nsim_dev; 893 nsim_dev->trap_data = nsim_trap_data; 894 895 err = devl_trap_policers_register(devlink, nsim_trap_policers_arr, 896 policers_count); 897 if (err) 898 goto err_trap_policers_cnt_free; 899 900 err = devl_trap_groups_register(devlink, nsim_trap_groups_arr, 901 ARRAY_SIZE(nsim_trap_groups_arr)); 902 if (err) 903 goto err_trap_policers_unregister; 904 905 err = devl_traps_register(devlink, nsim_traps_arr, 906 ARRAY_SIZE(nsim_traps_arr), NULL); 907 if (err) 908 goto err_trap_groups_unregister; 909 910 INIT_DELAYED_WORK(&nsim_dev->trap_data->trap_report_dw, 911 nsim_dev_trap_report_work); 912 queue_delayed_work(system_unbound_wq, 913 &nsim_dev->trap_data->trap_report_dw, 914 msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS)); 915 916 return 0; 917 918 err_trap_groups_unregister: 919 devl_trap_groups_unregister(devlink, nsim_trap_groups_arr, 920 ARRAY_SIZE(nsim_trap_groups_arr)); 921 err_trap_policers_unregister: 922 devl_trap_policers_unregister(devlink, nsim_trap_policers_arr, 923 ARRAY_SIZE(nsim_trap_policers_arr)); 924 err_trap_policers_cnt_free: 925 kfree(nsim_trap_data->trap_policers_cnt_arr); 926 err_trap_items_free: 927 kfree(nsim_trap_data->trap_items_arr); 928 err_trap_data_free: 929 kfree(nsim_trap_data); 930 return err; 931 } 932 933 static void nsim_dev_traps_exit(struct devlink *devlink) 934 { 935 struct nsim_dev *nsim_dev = devlink_priv(devlink); 936 937 /* caution, trap work takes devlink lock */ 938 cancel_delayed_work_sync(&nsim_dev->trap_data->trap_report_dw); 939 devl_traps_unregister(devlink, nsim_traps_arr, 940 ARRAY_SIZE(nsim_traps_arr)); 941 devl_trap_groups_unregister(devlink, nsim_trap_groups_arr, 942 ARRAY_SIZE(nsim_trap_groups_arr)); 943 devl_trap_policers_unregister(devlink, nsim_trap_policers_arr, 944 ARRAY_SIZE(nsim_trap_policers_arr)); 945 kfree(nsim_dev->trap_data->trap_policers_cnt_arr); 946 kfree(nsim_dev->trap_data->trap_items_arr); 947 kfree(nsim_dev->trap_data); 948 } 949 950 static int nsim_dev_reload_create(struct nsim_dev *nsim_dev, 951 struct netlink_ext_ack *extack); 952 static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev); 953 954 static int nsim_dev_reload_down(struct devlink *devlink, bool netns_change, 955 enum devlink_reload_action action, enum devlink_reload_limit limit, 956 struct netlink_ext_ack *extack) 957 { 958 struct nsim_dev *nsim_dev = devlink_priv(devlink); 959 960 if (nsim_dev->dont_allow_reload) { 961 /* For testing purposes, user set debugfs dont_allow_reload 962 * value to true. So forbid it. 963 */ 964 NL_SET_ERR_MSG_MOD(extack, "User forbid the reload for testing purposes"); 965 return -EOPNOTSUPP; 966 } 967 968 nsim_dev_reload_destroy(nsim_dev); 969 return 0; 970 } 971 972 static int nsim_dev_reload_up(struct devlink *devlink, enum devlink_reload_action action, 973 enum devlink_reload_limit limit, u32 *actions_performed, 974 struct netlink_ext_ack *extack) 975 { 976 struct nsim_dev *nsim_dev = devlink_priv(devlink); 977 978 if (nsim_dev->fail_reload) { 979 /* For testing purposes, user set debugfs fail_reload 980 * value to true. Fail right away. 981 */ 982 NL_SET_ERR_MSG_MOD(extack, "User setup the reload to fail for testing purposes"); 983 return -EINVAL; 984 } 985 986 *actions_performed = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT); 987 988 return nsim_dev_reload_create(nsim_dev, extack); 989 } 990 991 static int nsim_dev_info_get(struct devlink *devlink, 992 struct devlink_info_req *req, 993 struct netlink_ext_ack *extack) 994 { 995 int err; 996 997 err = devlink_info_version_stored_put_ext(req, "fw.mgmt", "10.20.30", 998 DEVLINK_INFO_VERSION_TYPE_COMPONENT); 999 if (err) 1000 return err; 1001 return devlink_info_version_running_put_ext(req, "fw.mgmt", "10.20.30", 1002 DEVLINK_INFO_VERSION_TYPE_COMPONENT); 1003 } 1004 1005 #define NSIM_DEV_FLASH_SIZE 500000 1006 #define NSIM_DEV_FLASH_CHUNK_SIZE 1000 1007 #define NSIM_DEV_FLASH_CHUNK_TIME_MS 10 1008 1009 static int nsim_dev_flash_update(struct devlink *devlink, 1010 struct devlink_flash_update_params *params, 1011 struct netlink_ext_ack *extack) 1012 { 1013 struct nsim_dev *nsim_dev = devlink_priv(devlink); 1014 int i; 1015 1016 if ((params->overwrite_mask & ~nsim_dev->fw_update_overwrite_mask) != 0) 1017 return -EOPNOTSUPP; 1018 1019 if (nsim_dev->fw_update_status) { 1020 devlink_flash_update_status_notify(devlink, 1021 "Preparing to flash", 1022 params->component, 0, 0); 1023 } 1024 1025 for (i = 0; i < NSIM_DEV_FLASH_SIZE / NSIM_DEV_FLASH_CHUNK_SIZE; i++) { 1026 if (nsim_dev->fw_update_status) 1027 devlink_flash_update_status_notify(devlink, "Flashing", 1028 params->component, 1029 i * NSIM_DEV_FLASH_CHUNK_SIZE, 1030 NSIM_DEV_FLASH_SIZE); 1031 msleep(NSIM_DEV_FLASH_CHUNK_TIME_MS); 1032 } 1033 1034 if (nsim_dev->fw_update_status) { 1035 devlink_flash_update_status_notify(devlink, "Flashing", 1036 params->component, 1037 NSIM_DEV_FLASH_SIZE, 1038 NSIM_DEV_FLASH_SIZE); 1039 devlink_flash_update_timeout_notify(devlink, "Flash select", 1040 params->component, 81); 1041 devlink_flash_update_status_notify(devlink, "Flashing done", 1042 params->component, 0, 0); 1043 } 1044 1045 return 0; 1046 } 1047 1048 static struct nsim_trap_item * 1049 nsim_dev_trap_item_lookup(struct nsim_dev *nsim_dev, u16 trap_id) 1050 { 1051 struct nsim_trap_data *nsim_trap_data = nsim_dev->trap_data; 1052 int i; 1053 1054 for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) { 1055 if (nsim_traps_arr[i].id == trap_id) 1056 return &nsim_trap_data->trap_items_arr[i]; 1057 } 1058 1059 return NULL; 1060 } 1061 1062 static int nsim_dev_devlink_trap_init(struct devlink *devlink, 1063 const struct devlink_trap *trap, 1064 void *trap_ctx) 1065 { 1066 struct nsim_dev *nsim_dev = devlink_priv(devlink); 1067 struct nsim_trap_item *nsim_trap_item; 1068 1069 nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id); 1070 if (WARN_ON(!nsim_trap_item)) 1071 return -ENOENT; 1072 1073 nsim_trap_item->trap_ctx = trap_ctx; 1074 nsim_trap_item->action = trap->init_action; 1075 1076 return 0; 1077 } 1078 1079 static int 1080 nsim_dev_devlink_trap_action_set(struct devlink *devlink, 1081 const struct devlink_trap *trap, 1082 enum devlink_trap_action action, 1083 struct netlink_ext_ack *extack) 1084 { 1085 struct nsim_dev *nsim_dev = devlink_priv(devlink); 1086 struct nsim_trap_item *nsim_trap_item; 1087 1088 nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id); 1089 if (WARN_ON(!nsim_trap_item)) 1090 return -ENOENT; 1091 1092 spin_lock(&nsim_dev->trap_data->trap_lock); 1093 nsim_trap_item->action = action; 1094 spin_unlock(&nsim_dev->trap_data->trap_lock); 1095 1096 return 0; 1097 } 1098 1099 static int 1100 nsim_dev_devlink_trap_group_set(struct devlink *devlink, 1101 const struct devlink_trap_group *group, 1102 const struct devlink_trap_policer *policer, 1103 struct netlink_ext_ack *extack) 1104 { 1105 struct nsim_dev *nsim_dev = devlink_priv(devlink); 1106 1107 if (nsim_dev->fail_trap_group_set) 1108 return -EINVAL; 1109 1110 return 0; 1111 } 1112 1113 static int 1114 nsim_dev_devlink_trap_policer_set(struct devlink *devlink, 1115 const struct devlink_trap_policer *policer, 1116 u64 rate, u64 burst, 1117 struct netlink_ext_ack *extack) 1118 { 1119 struct nsim_dev *nsim_dev = devlink_priv(devlink); 1120 1121 if (nsim_dev->fail_trap_policer_set) { 1122 NL_SET_ERR_MSG_MOD(extack, "User setup the operation to fail for testing purposes"); 1123 return -EINVAL; 1124 } 1125 1126 return 0; 1127 } 1128 1129 static int 1130 nsim_dev_devlink_trap_policer_counter_get(struct devlink *devlink, 1131 const struct devlink_trap_policer *policer, 1132 u64 *p_drops) 1133 { 1134 struct nsim_dev *nsim_dev = devlink_priv(devlink); 1135 u64 *cnt; 1136 1137 if (nsim_dev->fail_trap_policer_counter_get) 1138 return -EINVAL; 1139 1140 cnt = &nsim_dev->trap_data->trap_policers_cnt_arr[policer->id - 1]; 1141 *p_drops = (*cnt)++; 1142 1143 return 0; 1144 } 1145 1146 #define NSIM_LINK_SPEED_MAX 5000 /* Mbps */ 1147 #define NSIM_LINK_SPEED_UNIT 125000 /* 1 Mbps given in bytes/sec to avoid 1148 * u64 overflow during conversion from 1149 * bytes to bits. 1150 */ 1151 1152 static int nsim_rate_bytes_to_units(char *name, u64 *rate, struct netlink_ext_ack *extack) 1153 { 1154 u64 val; 1155 u32 rem; 1156 1157 val = div_u64_rem(*rate, NSIM_LINK_SPEED_UNIT, &rem); 1158 if (rem) { 1159 pr_err("%s rate value %lluBps not in link speed units of 1Mbps.\n", 1160 name, *rate); 1161 NL_SET_ERR_MSG_MOD(extack, "TX rate value not in link speed units of 1Mbps."); 1162 return -EINVAL; 1163 } 1164 1165 if (val > NSIM_LINK_SPEED_MAX) { 1166 pr_err("%s rate value %lluMbps exceed link maximum speed 5000Mbps.\n", 1167 name, val); 1168 NL_SET_ERR_MSG_MOD(extack, "TX rate value exceed link maximum speed 5000Mbps."); 1169 return -EINVAL; 1170 } 1171 *rate = val; 1172 return 0; 1173 } 1174 1175 static int nsim_leaf_tx_share_set(struct devlink_rate *devlink_rate, void *priv, 1176 u64 tx_share, struct netlink_ext_ack *extack) 1177 { 1178 struct nsim_dev_port *nsim_dev_port = priv; 1179 struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev; 1180 int vf_id = nsim_dev_port_index_to_vf_index(nsim_dev_port->port_index); 1181 int err; 1182 1183 err = nsim_rate_bytes_to_units("tx_share", &tx_share, extack); 1184 if (err) 1185 return err; 1186 1187 nsim_dev->vfconfigs[vf_id].min_tx_rate = tx_share; 1188 return 0; 1189 } 1190 1191 static int nsim_leaf_tx_max_set(struct devlink_rate *devlink_rate, void *priv, 1192 u64 tx_max, struct netlink_ext_ack *extack) 1193 { 1194 struct nsim_dev_port *nsim_dev_port = priv; 1195 struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev; 1196 int vf_id = nsim_dev_port_index_to_vf_index(nsim_dev_port->port_index); 1197 int err; 1198 1199 err = nsim_rate_bytes_to_units("tx_max", &tx_max, extack); 1200 if (err) 1201 return err; 1202 1203 nsim_dev->vfconfigs[vf_id].max_tx_rate = tx_max; 1204 return 0; 1205 } 1206 1207 struct nsim_rate_node { 1208 struct dentry *ddir; 1209 struct dentry *rate_parent; 1210 char *parent_name; 1211 u16 tx_share; 1212 u16 tx_max; 1213 }; 1214 1215 static int nsim_node_tx_share_set(struct devlink_rate *devlink_rate, void *priv, 1216 u64 tx_share, struct netlink_ext_ack *extack) 1217 { 1218 struct nsim_rate_node *nsim_node = priv; 1219 int err; 1220 1221 err = nsim_rate_bytes_to_units("tx_share", &tx_share, extack); 1222 if (err) 1223 return err; 1224 1225 nsim_node->tx_share = tx_share; 1226 return 0; 1227 } 1228 1229 static int nsim_node_tx_max_set(struct devlink_rate *devlink_rate, void *priv, 1230 u64 tx_max, struct netlink_ext_ack *extack) 1231 { 1232 struct nsim_rate_node *nsim_node = priv; 1233 int err; 1234 1235 err = nsim_rate_bytes_to_units("tx_max", &tx_max, extack); 1236 if (err) 1237 return err; 1238 1239 nsim_node->tx_max = tx_max; 1240 return 0; 1241 } 1242 1243 static int nsim_rate_node_new(struct devlink_rate *node, void **priv, 1244 struct netlink_ext_ack *extack) 1245 { 1246 struct nsim_dev *nsim_dev = devlink_priv(node->devlink); 1247 struct nsim_rate_node *nsim_node; 1248 1249 if (!nsim_esw_mode_is_switchdev(nsim_dev)) { 1250 NL_SET_ERR_MSG_MOD(extack, "Node creation allowed only in switchdev mode."); 1251 return -EOPNOTSUPP; 1252 } 1253 1254 nsim_node = kzalloc(sizeof(*nsim_node), GFP_KERNEL); 1255 if (!nsim_node) 1256 return -ENOMEM; 1257 1258 nsim_node->ddir = debugfs_create_dir(node->name, nsim_dev->nodes_ddir); 1259 1260 debugfs_create_u16("tx_share", 0400, nsim_node->ddir, &nsim_node->tx_share); 1261 debugfs_create_u16("tx_max", 0400, nsim_node->ddir, &nsim_node->tx_max); 1262 nsim_node->rate_parent = debugfs_create_file("rate_parent", 0400, 1263 nsim_node->ddir, 1264 &nsim_node->parent_name, 1265 &nsim_dev_rate_parent_fops); 1266 1267 *priv = nsim_node; 1268 return 0; 1269 } 1270 1271 static int nsim_rate_node_del(struct devlink_rate *node, void *priv, 1272 struct netlink_ext_ack *extack) 1273 { 1274 struct nsim_rate_node *nsim_node = priv; 1275 1276 debugfs_remove(nsim_node->rate_parent); 1277 debugfs_remove_recursive(nsim_node->ddir); 1278 kfree(nsim_node); 1279 return 0; 1280 } 1281 1282 static int nsim_rate_leaf_parent_set(struct devlink_rate *child, 1283 struct devlink_rate *parent, 1284 void *priv_child, void *priv_parent, 1285 struct netlink_ext_ack *extack) 1286 { 1287 struct nsim_dev_port *nsim_dev_port = priv_child; 1288 1289 if (parent) 1290 nsim_dev_port->parent_name = parent->name; 1291 else 1292 nsim_dev_port->parent_name = NULL; 1293 return 0; 1294 } 1295 1296 static int nsim_rate_node_parent_set(struct devlink_rate *child, 1297 struct devlink_rate *parent, 1298 void *priv_child, void *priv_parent, 1299 struct netlink_ext_ack *extack) 1300 { 1301 struct nsim_rate_node *nsim_node = priv_child; 1302 1303 if (parent) 1304 nsim_node->parent_name = parent->name; 1305 else 1306 nsim_node->parent_name = NULL; 1307 return 0; 1308 } 1309 1310 static int 1311 nsim_dev_devlink_trap_drop_counter_get(struct devlink *devlink, 1312 const struct devlink_trap *trap, 1313 u64 *p_drops) 1314 { 1315 struct nsim_dev *nsim_dev = devlink_priv(devlink); 1316 u64 *cnt; 1317 1318 if (nsim_dev->fail_trap_drop_counter_get) 1319 return -EINVAL; 1320 1321 cnt = &nsim_dev->trap_data->trap_pkt_cnt; 1322 *p_drops = (*cnt)++; 1323 1324 return 0; 1325 } 1326 1327 static const struct devlink_ops nsim_dev_devlink_ops = { 1328 .eswitch_mode_set = nsim_devlink_eswitch_mode_set, 1329 .eswitch_mode_get = nsim_devlink_eswitch_mode_get, 1330 .supported_flash_update_params = DEVLINK_SUPPORT_FLASH_UPDATE_OVERWRITE_MASK, 1331 .reload_actions = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT), 1332 .reload_down = nsim_dev_reload_down, 1333 .reload_up = nsim_dev_reload_up, 1334 .info_get = nsim_dev_info_get, 1335 .flash_update = nsim_dev_flash_update, 1336 .trap_init = nsim_dev_devlink_trap_init, 1337 .trap_action_set = nsim_dev_devlink_trap_action_set, 1338 .trap_group_set = nsim_dev_devlink_trap_group_set, 1339 .trap_policer_set = nsim_dev_devlink_trap_policer_set, 1340 .trap_policer_counter_get = nsim_dev_devlink_trap_policer_counter_get, 1341 .rate_leaf_tx_share_set = nsim_leaf_tx_share_set, 1342 .rate_leaf_tx_max_set = nsim_leaf_tx_max_set, 1343 .rate_node_tx_share_set = nsim_node_tx_share_set, 1344 .rate_node_tx_max_set = nsim_node_tx_max_set, 1345 .rate_node_new = nsim_rate_node_new, 1346 .rate_node_del = nsim_rate_node_del, 1347 .rate_leaf_parent_set = nsim_rate_leaf_parent_set, 1348 .rate_node_parent_set = nsim_rate_node_parent_set, 1349 .trap_drop_counter_get = nsim_dev_devlink_trap_drop_counter_get, 1350 }; 1351 1352 #define NSIM_DEV_MAX_MACS_DEFAULT 32 1353 #define NSIM_DEV_TEST1_DEFAULT true 1354 1355 static int __nsim_dev_port_add(struct nsim_dev *nsim_dev, enum nsim_dev_port_type type, 1356 unsigned int port_index) 1357 { 1358 struct devlink_port_attrs attrs = {}; 1359 struct nsim_dev_port *nsim_dev_port; 1360 struct devlink_port *devlink_port; 1361 int err; 1362 1363 if (type == NSIM_DEV_PORT_TYPE_VF && !nsim_dev_get_vfs(nsim_dev)) 1364 return -EINVAL; 1365 1366 nsim_dev_port = kzalloc(sizeof(*nsim_dev_port), GFP_KERNEL); 1367 if (!nsim_dev_port) 1368 return -ENOMEM; 1369 nsim_dev_port->port_index = nsim_dev_port_index(type, port_index); 1370 nsim_dev_port->port_type = type; 1371 1372 devlink_port = &nsim_dev_port->devlink_port; 1373 if (nsim_dev_port_is_pf(nsim_dev_port)) { 1374 attrs.flavour = DEVLINK_PORT_FLAVOUR_PHYSICAL; 1375 attrs.phys.port_number = port_index + 1; 1376 } else { 1377 attrs.flavour = DEVLINK_PORT_FLAVOUR_PCI_VF; 1378 attrs.pci_vf.pf = 0; 1379 attrs.pci_vf.vf = port_index; 1380 } 1381 memcpy(attrs.switch_id.id, nsim_dev->switch_id.id, nsim_dev->switch_id.id_len); 1382 attrs.switch_id.id_len = nsim_dev->switch_id.id_len; 1383 devlink_port_attrs_set(devlink_port, &attrs); 1384 err = devl_port_register(priv_to_devlink(nsim_dev), devlink_port, 1385 nsim_dev_port->port_index); 1386 if (err) 1387 goto err_port_free; 1388 1389 err = nsim_dev_port_debugfs_init(nsim_dev, nsim_dev_port); 1390 if (err) 1391 goto err_dl_port_unregister; 1392 1393 nsim_dev_port->ns = nsim_create(nsim_dev, nsim_dev_port); 1394 if (IS_ERR(nsim_dev_port->ns)) { 1395 err = PTR_ERR(nsim_dev_port->ns); 1396 goto err_port_debugfs_exit; 1397 } 1398 1399 if (nsim_dev_port_is_vf(nsim_dev_port)) { 1400 err = devl_rate_leaf_create(&nsim_dev_port->devlink_port, 1401 nsim_dev_port, NULL); 1402 if (err) 1403 goto err_nsim_destroy; 1404 } 1405 1406 list_add(&nsim_dev_port->list, &nsim_dev->port_list); 1407 1408 return 0; 1409 1410 err_nsim_destroy: 1411 nsim_destroy(nsim_dev_port->ns); 1412 err_port_debugfs_exit: 1413 nsim_dev_port_debugfs_exit(nsim_dev_port); 1414 err_dl_port_unregister: 1415 devl_port_unregister(devlink_port); 1416 err_port_free: 1417 kfree(nsim_dev_port); 1418 return err; 1419 } 1420 1421 static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port) 1422 { 1423 struct devlink_port *devlink_port = &nsim_dev_port->devlink_port; 1424 1425 list_del(&nsim_dev_port->list); 1426 if (nsim_dev_port_is_vf(nsim_dev_port)) 1427 devl_rate_leaf_destroy(&nsim_dev_port->devlink_port); 1428 nsim_destroy(nsim_dev_port->ns); 1429 nsim_dev_port_debugfs_exit(nsim_dev_port); 1430 devl_port_unregister(devlink_port); 1431 kfree(nsim_dev_port); 1432 } 1433 1434 static void nsim_dev_port_del_all(struct nsim_dev *nsim_dev) 1435 { 1436 struct nsim_dev_port *nsim_dev_port, *tmp; 1437 1438 list_for_each_entry_safe(nsim_dev_port, tmp, 1439 &nsim_dev->port_list, list) 1440 __nsim_dev_port_del(nsim_dev_port); 1441 } 1442 1443 static int nsim_dev_port_add_all(struct nsim_dev *nsim_dev, 1444 unsigned int port_count) 1445 { 1446 int i, err; 1447 1448 for (i = 0; i < port_count; i++) { 1449 err = __nsim_dev_port_add(nsim_dev, NSIM_DEV_PORT_TYPE_PF, i); 1450 if (err) 1451 goto err_port_del_all; 1452 } 1453 return 0; 1454 1455 err_port_del_all: 1456 nsim_dev_port_del_all(nsim_dev); 1457 return err; 1458 } 1459 1460 static int nsim_dev_reload_create(struct nsim_dev *nsim_dev, 1461 struct netlink_ext_ack *extack) 1462 { 1463 struct nsim_bus_dev *nsim_bus_dev = nsim_dev->nsim_bus_dev; 1464 struct devlink *devlink; 1465 int err; 1466 1467 devlink = priv_to_devlink(nsim_dev); 1468 nsim_dev = devlink_priv(devlink); 1469 INIT_LIST_HEAD(&nsim_dev->port_list); 1470 nsim_dev->fw_update_status = true; 1471 nsim_dev->fw_update_overwrite_mask = 0; 1472 1473 nsim_devlink_param_load_driverinit_values(devlink); 1474 1475 err = nsim_dev_dummy_region_init(nsim_dev, devlink); 1476 if (err) 1477 return err; 1478 1479 err = nsim_dev_traps_init(devlink); 1480 if (err) 1481 goto err_dummy_region_exit; 1482 1483 nsim_dev->fib_data = nsim_fib_create(devlink, extack); 1484 if (IS_ERR(nsim_dev->fib_data)) { 1485 err = PTR_ERR(nsim_dev->fib_data); 1486 goto err_traps_exit; 1487 } 1488 1489 err = nsim_dev_health_init(nsim_dev, devlink); 1490 if (err) 1491 goto err_fib_destroy; 1492 1493 err = nsim_dev_psample_init(nsim_dev); 1494 if (err) 1495 goto err_health_exit; 1496 1497 err = nsim_dev_hwstats_init(nsim_dev); 1498 if (err) 1499 goto err_psample_exit; 1500 1501 err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count); 1502 if (err) 1503 goto err_hwstats_exit; 1504 1505 nsim_dev->take_snapshot = debugfs_create_file("take_snapshot", 1506 0200, 1507 nsim_dev->ddir, 1508 nsim_dev, 1509 &nsim_dev_take_snapshot_fops); 1510 return 0; 1511 1512 err_hwstats_exit: 1513 nsim_dev_hwstats_exit(nsim_dev); 1514 err_psample_exit: 1515 nsim_dev_psample_exit(nsim_dev); 1516 err_health_exit: 1517 nsim_dev_health_exit(nsim_dev); 1518 err_fib_destroy: 1519 nsim_fib_destroy(devlink, nsim_dev->fib_data); 1520 err_traps_exit: 1521 nsim_dev_traps_exit(devlink); 1522 err_dummy_region_exit: 1523 nsim_dev_dummy_region_exit(nsim_dev); 1524 return err; 1525 } 1526 1527 int nsim_drv_probe(struct nsim_bus_dev *nsim_bus_dev) 1528 { 1529 struct nsim_dev *nsim_dev; 1530 struct devlink *devlink; 1531 int err; 1532 1533 devlink = devlink_alloc_ns(&nsim_dev_devlink_ops, sizeof(*nsim_dev), 1534 nsim_bus_dev->initial_net, &nsim_bus_dev->dev); 1535 if (!devlink) 1536 return -ENOMEM; 1537 devl_lock(devlink); 1538 nsim_dev = devlink_priv(devlink); 1539 nsim_dev->nsim_bus_dev = nsim_bus_dev; 1540 nsim_dev->switch_id.id_len = sizeof(nsim_dev->switch_id.id); 1541 get_random_bytes(nsim_dev->switch_id.id, nsim_dev->switch_id.id_len); 1542 INIT_LIST_HEAD(&nsim_dev->port_list); 1543 nsim_dev->fw_update_status = true; 1544 nsim_dev->fw_update_overwrite_mask = 0; 1545 nsim_dev->max_macs = NSIM_DEV_MAX_MACS_DEFAULT; 1546 nsim_dev->test1 = NSIM_DEV_TEST1_DEFAULT; 1547 spin_lock_init(&nsim_dev->fa_cookie_lock); 1548 1549 dev_set_drvdata(&nsim_bus_dev->dev, nsim_dev); 1550 1551 nsim_dev->vfconfigs = kcalloc(nsim_bus_dev->max_vfs, 1552 sizeof(struct nsim_vf_config), 1553 GFP_KERNEL | __GFP_NOWARN); 1554 if (!nsim_dev->vfconfigs) { 1555 err = -ENOMEM; 1556 goto err_devlink_unlock; 1557 } 1558 1559 err = devl_register(devlink); 1560 if (err) 1561 goto err_vfc_free; 1562 1563 err = nsim_dev_resources_register(devlink); 1564 if (err) 1565 goto err_dl_unregister; 1566 1567 err = devl_params_register(devlink, nsim_devlink_params, 1568 ARRAY_SIZE(nsim_devlink_params)); 1569 if (err) 1570 goto err_resource_unregister; 1571 nsim_devlink_set_params_init_values(nsim_dev, devlink); 1572 1573 err = nsim_dev_dummy_region_init(nsim_dev, devlink); 1574 if (err) 1575 goto err_params_unregister; 1576 1577 err = nsim_dev_traps_init(devlink); 1578 if (err) 1579 goto err_dummy_region_exit; 1580 1581 err = nsim_dev_debugfs_init(nsim_dev); 1582 if (err) 1583 goto err_traps_exit; 1584 1585 nsim_dev->fib_data = nsim_fib_create(devlink, NULL); 1586 if (IS_ERR(nsim_dev->fib_data)) { 1587 err = PTR_ERR(nsim_dev->fib_data); 1588 goto err_debugfs_exit; 1589 } 1590 1591 err = nsim_dev_health_init(nsim_dev, devlink); 1592 if (err) 1593 goto err_fib_destroy; 1594 1595 err = nsim_bpf_dev_init(nsim_dev); 1596 if (err) 1597 goto err_health_exit; 1598 1599 err = nsim_dev_psample_init(nsim_dev); 1600 if (err) 1601 goto err_bpf_dev_exit; 1602 1603 err = nsim_dev_hwstats_init(nsim_dev); 1604 if (err) 1605 goto err_psample_exit; 1606 1607 err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count); 1608 if (err) 1609 goto err_hwstats_exit; 1610 1611 nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_LEGACY; 1612 devl_unlock(devlink); 1613 return 0; 1614 1615 err_hwstats_exit: 1616 nsim_dev_hwstats_exit(nsim_dev); 1617 err_psample_exit: 1618 nsim_dev_psample_exit(nsim_dev); 1619 err_bpf_dev_exit: 1620 nsim_bpf_dev_exit(nsim_dev); 1621 err_health_exit: 1622 nsim_dev_health_exit(nsim_dev); 1623 err_fib_destroy: 1624 nsim_fib_destroy(devlink, nsim_dev->fib_data); 1625 err_debugfs_exit: 1626 nsim_dev_debugfs_exit(nsim_dev); 1627 err_traps_exit: 1628 nsim_dev_traps_exit(devlink); 1629 err_dummy_region_exit: 1630 nsim_dev_dummy_region_exit(nsim_dev); 1631 err_params_unregister: 1632 devl_params_unregister(devlink, nsim_devlink_params, 1633 ARRAY_SIZE(nsim_devlink_params)); 1634 err_resource_unregister: 1635 devl_resources_unregister(devlink); 1636 err_dl_unregister: 1637 devl_unregister(devlink); 1638 err_vfc_free: 1639 kfree(nsim_dev->vfconfigs); 1640 err_devlink_unlock: 1641 devl_unlock(devlink); 1642 devlink_free(devlink); 1643 dev_set_drvdata(&nsim_bus_dev->dev, NULL); 1644 return err; 1645 } 1646 1647 static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev) 1648 { 1649 struct devlink *devlink = priv_to_devlink(nsim_dev); 1650 1651 if (devlink_is_reload_failed(devlink)) 1652 return; 1653 debugfs_remove(nsim_dev->take_snapshot); 1654 1655 if (nsim_dev_get_vfs(nsim_dev)) { 1656 nsim_bus_dev_set_vfs(nsim_dev->nsim_bus_dev, 0); 1657 if (nsim_esw_mode_is_switchdev(nsim_dev)) 1658 nsim_esw_legacy_enable(nsim_dev, NULL); 1659 } 1660 1661 nsim_dev_port_del_all(nsim_dev); 1662 nsim_dev_hwstats_exit(nsim_dev); 1663 nsim_dev_psample_exit(nsim_dev); 1664 nsim_dev_health_exit(nsim_dev); 1665 nsim_fib_destroy(devlink, nsim_dev->fib_data); 1666 nsim_dev_traps_exit(devlink); 1667 nsim_dev_dummy_region_exit(nsim_dev); 1668 } 1669 1670 void nsim_drv_remove(struct nsim_bus_dev *nsim_bus_dev) 1671 { 1672 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); 1673 struct devlink *devlink = priv_to_devlink(nsim_dev); 1674 1675 devl_lock(devlink); 1676 nsim_dev_reload_destroy(nsim_dev); 1677 1678 nsim_bpf_dev_exit(nsim_dev); 1679 nsim_dev_debugfs_exit(nsim_dev); 1680 devl_params_unregister(devlink, nsim_devlink_params, 1681 ARRAY_SIZE(nsim_devlink_params)); 1682 devl_resources_unregister(devlink); 1683 devl_unregister(devlink); 1684 kfree(nsim_dev->vfconfigs); 1685 kfree(nsim_dev->fa_cookie); 1686 devl_unlock(devlink); 1687 devlink_free(devlink); 1688 dev_set_drvdata(&nsim_bus_dev->dev, NULL); 1689 } 1690 1691 static struct nsim_dev_port * 1692 __nsim_dev_port_lookup(struct nsim_dev *nsim_dev, enum nsim_dev_port_type type, 1693 unsigned int port_index) 1694 { 1695 struct nsim_dev_port *nsim_dev_port; 1696 1697 port_index = nsim_dev_port_index(type, port_index); 1698 list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list) 1699 if (nsim_dev_port->port_index == port_index) 1700 return nsim_dev_port; 1701 return NULL; 1702 } 1703 1704 int nsim_drv_port_add(struct nsim_bus_dev *nsim_bus_dev, enum nsim_dev_port_type type, 1705 unsigned int port_index) 1706 { 1707 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); 1708 int err; 1709 1710 devl_lock(priv_to_devlink(nsim_dev)); 1711 if (__nsim_dev_port_lookup(nsim_dev, type, port_index)) 1712 err = -EEXIST; 1713 else 1714 err = __nsim_dev_port_add(nsim_dev, type, port_index); 1715 devl_unlock(priv_to_devlink(nsim_dev)); 1716 return err; 1717 } 1718 1719 int nsim_drv_port_del(struct nsim_bus_dev *nsim_bus_dev, enum nsim_dev_port_type type, 1720 unsigned int port_index) 1721 { 1722 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); 1723 struct nsim_dev_port *nsim_dev_port; 1724 int err = 0; 1725 1726 devl_lock(priv_to_devlink(nsim_dev)); 1727 nsim_dev_port = __nsim_dev_port_lookup(nsim_dev, type, port_index); 1728 if (!nsim_dev_port) 1729 err = -ENOENT; 1730 else 1731 __nsim_dev_port_del(nsim_dev_port); 1732 devl_unlock(priv_to_devlink(nsim_dev)); 1733 return err; 1734 } 1735 1736 int nsim_drv_configure_vfs(struct nsim_bus_dev *nsim_bus_dev, 1737 unsigned int num_vfs) 1738 { 1739 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); 1740 struct devlink *devlink = priv_to_devlink(nsim_dev); 1741 int ret = 0; 1742 1743 devl_lock(devlink); 1744 if (nsim_bus_dev->num_vfs == num_vfs) 1745 goto exit_unlock; 1746 if (nsim_bus_dev->num_vfs && num_vfs) { 1747 ret = -EBUSY; 1748 goto exit_unlock; 1749 } 1750 if (nsim_bus_dev->max_vfs < num_vfs) { 1751 ret = -ENOMEM; 1752 goto exit_unlock; 1753 } 1754 1755 nsim_bus_dev_set_vfs(nsim_bus_dev, num_vfs); 1756 if (nsim_esw_mode_is_switchdev(nsim_dev)) { 1757 if (num_vfs) { 1758 ret = nsim_esw_switchdev_enable(nsim_dev, NULL); 1759 if (ret) { 1760 nsim_bus_dev_set_vfs(nsim_bus_dev, 0); 1761 goto exit_unlock; 1762 } 1763 } else { 1764 nsim_esw_legacy_enable(nsim_dev, NULL); 1765 } 1766 } 1767 1768 exit_unlock: 1769 devl_unlock(devlink); 1770 1771 return ret; 1772 } 1773 1774 int nsim_dev_init(void) 1775 { 1776 nsim_dev_ddir = debugfs_create_dir(DRV_NAME, NULL); 1777 return PTR_ERR_OR_ZERO(nsim_dev_ddir); 1778 } 1779 1780 void nsim_dev_exit(void) 1781 { 1782 debugfs_remove_recursive(nsim_dev_ddir); 1783 } 1784