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 buf = kmalloc(count, GFP_KERNEL | __GFP_NOWARN); 188 if (!buf) 189 return -ENOMEM; 190 191 ret = simple_write_to_buffer(buf, count, ppos, data, count); 192 if (ret < 0) 193 goto free_buf; 194 195 fa_cookie = kmalloc(sizeof(*fa_cookie) + cookie_len, 196 GFP_KERNEL | __GFP_NOWARN); 197 if (!fa_cookie) { 198 ret = -ENOMEM; 199 goto free_buf; 200 } 201 202 fa_cookie->cookie_len = cookie_len; 203 ret = hex2bin(fa_cookie->cookie, buf, cookie_len); 204 if (ret) 205 goto free_fa_cookie; 206 kfree(buf); 207 208 spin_lock(&nsim_dev->fa_cookie_lock); 209 kfree(nsim_dev->fa_cookie); 210 nsim_dev->fa_cookie = fa_cookie; 211 spin_unlock(&nsim_dev->fa_cookie_lock); 212 213 return count; 214 215 free_fa_cookie: 216 kfree(fa_cookie); 217 free_buf: 218 kfree(buf); 219 return ret; 220 } 221 222 static const struct file_operations nsim_dev_trap_fa_cookie_fops = { 223 .open = simple_open, 224 .read = nsim_dev_trap_fa_cookie_read, 225 .write = nsim_dev_trap_fa_cookie_write, 226 .llseek = generic_file_llseek, 227 .owner = THIS_MODULE, 228 }; 229 230 static ssize_t nsim_bus_dev_max_vfs_read(struct file *file, char __user *data, 231 size_t count, loff_t *ppos) 232 { 233 struct nsim_dev *nsim_dev = file->private_data; 234 char buf[11]; 235 ssize_t len; 236 237 len = scnprintf(buf, sizeof(buf), "%u\n", 238 READ_ONCE(nsim_dev->nsim_bus_dev->max_vfs)); 239 240 return simple_read_from_buffer(data, count, ppos, buf, len); 241 } 242 243 static ssize_t nsim_bus_dev_max_vfs_write(struct file *file, 244 const char __user *data, 245 size_t count, loff_t *ppos) 246 { 247 struct nsim_vf_config *vfconfigs; 248 struct nsim_dev *nsim_dev; 249 char buf[10]; 250 ssize_t ret; 251 u32 val; 252 253 if (*ppos != 0) 254 return 0; 255 256 if (count >= sizeof(buf)) 257 return -ENOSPC; 258 259 ret = copy_from_user(buf, data, count); 260 if (ret) 261 return -EFAULT; 262 buf[count] = '\0'; 263 264 ret = kstrtouint(buf, 10, &val); 265 if (ret) 266 return -EINVAL; 267 268 /* max_vfs limited by the maximum number of provided port indexes */ 269 if (val > NSIM_DEV_VF_PORT_INDEX_MAX - NSIM_DEV_VF_PORT_INDEX_BASE) 270 return -ERANGE; 271 272 vfconfigs = kcalloc(val, sizeof(struct nsim_vf_config), 273 GFP_KERNEL | __GFP_NOWARN); 274 if (!vfconfigs) 275 return -ENOMEM; 276 277 nsim_dev = file->private_data; 278 devl_lock(priv_to_devlink(nsim_dev)); 279 /* Reject if VFs are configured */ 280 if (nsim_dev_get_vfs(nsim_dev)) { 281 ret = -EBUSY; 282 } else { 283 swap(nsim_dev->vfconfigs, vfconfigs); 284 WRITE_ONCE(nsim_dev->nsim_bus_dev->max_vfs, val); 285 *ppos += count; 286 ret = count; 287 } 288 devl_unlock(priv_to_devlink(nsim_dev)); 289 290 kfree(vfconfigs); 291 return ret; 292 } 293 294 static const struct file_operations nsim_dev_max_vfs_fops = { 295 .open = simple_open, 296 .read = nsim_bus_dev_max_vfs_read, 297 .write = nsim_bus_dev_max_vfs_write, 298 .llseek = generic_file_llseek, 299 .owner = THIS_MODULE, 300 }; 301 302 static int nsim_dev_debugfs_init(struct nsim_dev *nsim_dev) 303 { 304 char dev_ddir_name[sizeof(DRV_NAME) + 10]; 305 int err; 306 307 sprintf(dev_ddir_name, DRV_NAME "%u", nsim_dev->nsim_bus_dev->dev.id); 308 nsim_dev->ddir = debugfs_create_dir(dev_ddir_name, nsim_dev_ddir); 309 if (IS_ERR(nsim_dev->ddir)) 310 return PTR_ERR(nsim_dev->ddir); 311 nsim_dev->ports_ddir = debugfs_create_dir("ports", nsim_dev->ddir); 312 if (IS_ERR(nsim_dev->ports_ddir)) { 313 err = PTR_ERR(nsim_dev->ports_ddir); 314 goto err_ddir; 315 } 316 debugfs_create_bool("fw_update_status", 0600, nsim_dev->ddir, 317 &nsim_dev->fw_update_status); 318 debugfs_create_u32("fw_update_overwrite_mask", 0600, nsim_dev->ddir, 319 &nsim_dev->fw_update_overwrite_mask); 320 debugfs_create_u32("max_macs", 0600, nsim_dev->ddir, 321 &nsim_dev->max_macs); 322 debugfs_create_bool("test1", 0600, nsim_dev->ddir, 323 &nsim_dev->test1); 324 nsim_dev->take_snapshot = debugfs_create_file("take_snapshot", 325 0200, 326 nsim_dev->ddir, 327 nsim_dev, 328 &nsim_dev_take_snapshot_fops); 329 debugfs_create_bool("dont_allow_reload", 0600, nsim_dev->ddir, 330 &nsim_dev->dont_allow_reload); 331 debugfs_create_bool("fail_reload", 0600, nsim_dev->ddir, 332 &nsim_dev->fail_reload); 333 debugfs_create_file("trap_flow_action_cookie", 0600, nsim_dev->ddir, 334 nsim_dev, &nsim_dev_trap_fa_cookie_fops); 335 debugfs_create_bool("fail_trap_group_set", 0600, 336 nsim_dev->ddir, 337 &nsim_dev->fail_trap_group_set); 338 debugfs_create_bool("fail_trap_policer_set", 0600, 339 nsim_dev->ddir, 340 &nsim_dev->fail_trap_policer_set); 341 debugfs_create_bool("fail_trap_policer_counter_get", 0600, 342 nsim_dev->ddir, 343 &nsim_dev->fail_trap_policer_counter_get); 344 /* caution, dev_max_vfs write takes devlink lock */ 345 debugfs_create_file("max_vfs", 0600, nsim_dev->ddir, 346 nsim_dev, &nsim_dev_max_vfs_fops); 347 348 nsim_dev->nodes_ddir = debugfs_create_dir("rate_nodes", nsim_dev->ddir); 349 if (IS_ERR(nsim_dev->nodes_ddir)) { 350 err = PTR_ERR(nsim_dev->nodes_ddir); 351 goto err_ports_ddir; 352 } 353 debugfs_create_bool("fail_trap_drop_counter_get", 0600, 354 nsim_dev->ddir, 355 &nsim_dev->fail_trap_drop_counter_get); 356 nsim_udp_tunnels_debugfs_create(nsim_dev); 357 return 0; 358 359 err_ports_ddir: 360 debugfs_remove_recursive(nsim_dev->ports_ddir); 361 err_ddir: 362 debugfs_remove_recursive(nsim_dev->ddir); 363 return err; 364 } 365 366 static void nsim_dev_debugfs_exit(struct nsim_dev *nsim_dev) 367 { 368 debugfs_remove_recursive(nsim_dev->nodes_ddir); 369 debugfs_remove_recursive(nsim_dev->ports_ddir); 370 debugfs_remove_recursive(nsim_dev->ddir); 371 } 372 373 static ssize_t nsim_dev_rate_parent_read(struct file *file, 374 char __user *data, 375 size_t count, loff_t *ppos) 376 { 377 char **name_ptr = file->private_data; 378 size_t len; 379 380 if (!*name_ptr) 381 return 0; 382 383 len = strlen(*name_ptr); 384 return simple_read_from_buffer(data, count, ppos, *name_ptr, len); 385 } 386 387 static const struct file_operations nsim_dev_rate_parent_fops = { 388 .open = simple_open, 389 .read = nsim_dev_rate_parent_read, 390 .llseek = generic_file_llseek, 391 .owner = THIS_MODULE, 392 }; 393 394 static int nsim_dev_port_debugfs_init(struct nsim_dev *nsim_dev, 395 struct nsim_dev_port *nsim_dev_port) 396 { 397 struct nsim_bus_dev *nsim_bus_dev = nsim_dev->nsim_bus_dev; 398 unsigned int port_index = nsim_dev_port->port_index; 399 char port_ddir_name[16]; 400 char dev_link_name[32]; 401 402 sprintf(port_ddir_name, "%u", port_index); 403 nsim_dev_port->ddir = debugfs_create_dir(port_ddir_name, 404 nsim_dev->ports_ddir); 405 if (IS_ERR(nsim_dev_port->ddir)) 406 return PTR_ERR(nsim_dev_port->ddir); 407 408 sprintf(dev_link_name, "../../../" DRV_NAME "%u", nsim_bus_dev->dev.id); 409 if (nsim_dev_port_is_vf(nsim_dev_port)) { 410 unsigned int vf_id = nsim_dev_port_index_to_vf_index(port_index); 411 412 debugfs_create_u16("tx_share", 0400, nsim_dev_port->ddir, 413 &nsim_dev->vfconfigs[vf_id].min_tx_rate); 414 debugfs_create_u16("tx_max", 0400, nsim_dev_port->ddir, 415 &nsim_dev->vfconfigs[vf_id].max_tx_rate); 416 nsim_dev_port->rate_parent = debugfs_create_file("rate_parent", 417 0400, 418 nsim_dev_port->ddir, 419 &nsim_dev_port->parent_name, 420 &nsim_dev_rate_parent_fops); 421 } 422 debugfs_create_symlink("dev", nsim_dev_port->ddir, dev_link_name); 423 424 return 0; 425 } 426 427 static void nsim_dev_port_debugfs_exit(struct nsim_dev_port *nsim_dev_port) 428 { 429 debugfs_remove_recursive(nsim_dev_port->ddir); 430 } 431 432 static int nsim_dev_resources_register(struct devlink *devlink) 433 { 434 struct devlink_resource_size_params params = { 435 .size_max = (u64)-1, 436 .size_granularity = 1, 437 .unit = DEVLINK_RESOURCE_UNIT_ENTRY 438 }; 439 int err; 440 441 /* Resources for IPv4 */ 442 err = devl_resource_register(devlink, "IPv4", (u64)-1, 443 NSIM_RESOURCE_IPV4, 444 DEVLINK_RESOURCE_ID_PARENT_TOP, 445 ¶ms); 446 if (err) { 447 pr_err("Failed to register IPv4 top resource\n"); 448 goto err_out; 449 } 450 451 err = devl_resource_register(devlink, "fib", (u64)-1, 452 NSIM_RESOURCE_IPV4_FIB, 453 NSIM_RESOURCE_IPV4, ¶ms); 454 if (err) { 455 pr_err("Failed to register IPv4 FIB resource\n"); 456 goto err_out; 457 } 458 459 err = devl_resource_register(devlink, "fib-rules", (u64)-1, 460 NSIM_RESOURCE_IPV4_FIB_RULES, 461 NSIM_RESOURCE_IPV4, ¶ms); 462 if (err) { 463 pr_err("Failed to register IPv4 FIB rules resource\n"); 464 goto err_out; 465 } 466 467 /* Resources for IPv6 */ 468 err = devl_resource_register(devlink, "IPv6", (u64)-1, 469 NSIM_RESOURCE_IPV6, 470 DEVLINK_RESOURCE_ID_PARENT_TOP, 471 ¶ms); 472 if (err) { 473 pr_err("Failed to register IPv6 top resource\n"); 474 goto err_out; 475 } 476 477 err = devl_resource_register(devlink, "fib", (u64)-1, 478 NSIM_RESOURCE_IPV6_FIB, 479 NSIM_RESOURCE_IPV6, ¶ms); 480 if (err) { 481 pr_err("Failed to register IPv6 FIB resource\n"); 482 goto err_out; 483 } 484 485 err = devl_resource_register(devlink, "fib-rules", (u64)-1, 486 NSIM_RESOURCE_IPV6_FIB_RULES, 487 NSIM_RESOURCE_IPV6, ¶ms); 488 if (err) { 489 pr_err("Failed to register IPv6 FIB rules resource\n"); 490 goto err_out; 491 } 492 493 /* Resources for nexthops */ 494 err = devl_resource_register(devlink, "nexthops", (u64)-1, 495 NSIM_RESOURCE_NEXTHOPS, 496 DEVLINK_RESOURCE_ID_PARENT_TOP, 497 ¶ms); 498 if (err) { 499 pr_err("Failed to register NEXTHOPS resource\n"); 500 goto err_out; 501 } 502 return 0; 503 504 err_out: 505 devl_resources_unregister(devlink); 506 return err; 507 } 508 509 enum nsim_devlink_param_id { 510 NSIM_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX, 511 NSIM_DEVLINK_PARAM_ID_TEST1, 512 }; 513 514 static const struct devlink_param nsim_devlink_params[] = { 515 DEVLINK_PARAM_GENERIC(MAX_MACS, 516 BIT(DEVLINK_PARAM_CMODE_DRIVERINIT), 517 NULL, NULL, NULL), 518 DEVLINK_PARAM_DRIVER(NSIM_DEVLINK_PARAM_ID_TEST1, 519 "test1", DEVLINK_PARAM_TYPE_BOOL, 520 BIT(DEVLINK_PARAM_CMODE_DRIVERINIT), 521 NULL, NULL, NULL), 522 }; 523 524 static void nsim_devlink_set_params_init_values(struct nsim_dev *nsim_dev, 525 struct devlink *devlink) 526 { 527 union devlink_param_value value; 528 529 value.vu32 = nsim_dev->max_macs; 530 devlink_param_driverinit_value_set(devlink, 531 DEVLINK_PARAM_GENERIC_ID_MAX_MACS, 532 value); 533 value.vbool = nsim_dev->test1; 534 devlink_param_driverinit_value_set(devlink, 535 NSIM_DEVLINK_PARAM_ID_TEST1, 536 value); 537 } 538 539 static void nsim_devlink_param_load_driverinit_values(struct devlink *devlink) 540 { 541 struct nsim_dev *nsim_dev = devlink_priv(devlink); 542 union devlink_param_value saved_value; 543 int err; 544 545 err = devlink_param_driverinit_value_get(devlink, 546 DEVLINK_PARAM_GENERIC_ID_MAX_MACS, 547 &saved_value); 548 if (!err) 549 nsim_dev->max_macs = saved_value.vu32; 550 err = devlink_param_driverinit_value_get(devlink, 551 NSIM_DEVLINK_PARAM_ID_TEST1, 552 &saved_value); 553 if (!err) 554 nsim_dev->test1 = saved_value.vbool; 555 } 556 557 #define NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX 16 558 559 static const struct devlink_region_ops dummy_region_ops = { 560 .name = "dummy", 561 .destructor = &kfree, 562 .snapshot = nsim_dev_take_snapshot, 563 }; 564 565 static int nsim_dev_dummy_region_init(struct nsim_dev *nsim_dev, 566 struct devlink *devlink) 567 { 568 nsim_dev->dummy_region = 569 devl_region_create(devlink, &dummy_region_ops, 570 NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX, 571 NSIM_DEV_DUMMY_REGION_SIZE); 572 return PTR_ERR_OR_ZERO(nsim_dev->dummy_region); 573 } 574 575 static void nsim_dev_dummy_region_exit(struct nsim_dev *nsim_dev) 576 { 577 devl_region_destroy(nsim_dev->dummy_region); 578 } 579 580 static int 581 __nsim_dev_port_add(struct nsim_dev *nsim_dev, enum nsim_dev_port_type type, 582 unsigned int port_index); 583 static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port); 584 585 static int nsim_esw_legacy_enable(struct nsim_dev *nsim_dev, 586 struct netlink_ext_ack *extack) 587 { 588 struct devlink *devlink = priv_to_devlink(nsim_dev); 589 struct nsim_dev_port *nsim_dev_port, *tmp; 590 591 devl_rate_nodes_destroy(devlink); 592 list_for_each_entry_safe(nsim_dev_port, tmp, &nsim_dev->port_list, list) 593 if (nsim_dev_port_is_vf(nsim_dev_port)) 594 __nsim_dev_port_del(nsim_dev_port); 595 nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_LEGACY; 596 return 0; 597 } 598 599 static int nsim_esw_switchdev_enable(struct nsim_dev *nsim_dev, 600 struct netlink_ext_ack *extack) 601 { 602 struct nsim_dev_port *nsim_dev_port, *tmp; 603 int i, err; 604 605 for (i = 0; i < nsim_dev_get_vfs(nsim_dev); i++) { 606 err = __nsim_dev_port_add(nsim_dev, NSIM_DEV_PORT_TYPE_VF, i); 607 if (err) { 608 NL_SET_ERR_MSG_MOD(extack, "Failed to initialize VFs' netdevsim ports"); 609 pr_err("Failed to initialize VF id=%d. %d.\n", i, err); 610 goto err_port_add_vfs; 611 } 612 } 613 nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_SWITCHDEV; 614 return 0; 615 616 err_port_add_vfs: 617 list_for_each_entry_safe(nsim_dev_port, tmp, &nsim_dev->port_list, list) 618 if (nsim_dev_port_is_vf(nsim_dev_port)) 619 __nsim_dev_port_del(nsim_dev_port); 620 return err; 621 } 622 623 static int nsim_devlink_eswitch_mode_set(struct devlink *devlink, u16 mode, 624 struct netlink_ext_ack *extack) 625 { 626 struct nsim_dev *nsim_dev = devlink_priv(devlink); 627 628 if (mode == nsim_dev->esw_mode) 629 return 0; 630 631 if (mode == DEVLINK_ESWITCH_MODE_LEGACY) 632 return nsim_esw_legacy_enable(nsim_dev, extack); 633 if (mode == DEVLINK_ESWITCH_MODE_SWITCHDEV) 634 return nsim_esw_switchdev_enable(nsim_dev, extack); 635 636 return -EINVAL; 637 } 638 639 static int nsim_devlink_eswitch_mode_get(struct devlink *devlink, u16 *mode) 640 { 641 struct nsim_dev *nsim_dev = devlink_priv(devlink); 642 643 *mode = nsim_dev->esw_mode; 644 return 0; 645 } 646 647 struct nsim_trap_item { 648 void *trap_ctx; 649 enum devlink_trap_action action; 650 }; 651 652 struct nsim_trap_data { 653 struct delayed_work trap_report_dw; 654 struct nsim_trap_item *trap_items_arr; 655 u64 *trap_policers_cnt_arr; 656 u64 trap_pkt_cnt; 657 struct nsim_dev *nsim_dev; 658 spinlock_t trap_lock; /* Protects trap_items_arr */ 659 }; 660 661 /* All driver-specific traps must be documented in 662 * Documentation/networking/devlink/netdevsim.rst 663 */ 664 enum { 665 NSIM_TRAP_ID_BASE = DEVLINK_TRAP_GENERIC_ID_MAX, 666 NSIM_TRAP_ID_FID_MISS, 667 }; 668 669 #define NSIM_TRAP_NAME_FID_MISS "fid_miss" 670 671 #define NSIM_TRAP_METADATA DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT 672 673 #define NSIM_TRAP_DROP(_id, _group_id) \ 674 DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \ 675 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ 676 NSIM_TRAP_METADATA) 677 #define NSIM_TRAP_DROP_EXT(_id, _group_id, _metadata) \ 678 DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \ 679 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ 680 NSIM_TRAP_METADATA | (_metadata)) 681 #define NSIM_TRAP_EXCEPTION(_id, _group_id) \ 682 DEVLINK_TRAP_GENERIC(EXCEPTION, TRAP, _id, \ 683 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ 684 NSIM_TRAP_METADATA) 685 #define NSIM_TRAP_CONTROL(_id, _group_id, _action) \ 686 DEVLINK_TRAP_GENERIC(CONTROL, _action, _id, \ 687 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ 688 NSIM_TRAP_METADATA) 689 #define NSIM_TRAP_DRIVER_EXCEPTION(_id, _group_id) \ 690 DEVLINK_TRAP_DRIVER(EXCEPTION, TRAP, NSIM_TRAP_ID_##_id, \ 691 NSIM_TRAP_NAME_##_id, \ 692 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ 693 NSIM_TRAP_METADATA) 694 695 #define NSIM_DEV_TRAP_POLICER_MIN_RATE 1 696 #define NSIM_DEV_TRAP_POLICER_MAX_RATE 8000 697 #define NSIM_DEV_TRAP_POLICER_MIN_BURST 8 698 #define NSIM_DEV_TRAP_POLICER_MAX_BURST 65536 699 700 #define NSIM_TRAP_POLICER(_id, _rate, _burst) \ 701 DEVLINK_TRAP_POLICER(_id, _rate, _burst, \ 702 NSIM_DEV_TRAP_POLICER_MAX_RATE, \ 703 NSIM_DEV_TRAP_POLICER_MIN_RATE, \ 704 NSIM_DEV_TRAP_POLICER_MAX_BURST, \ 705 NSIM_DEV_TRAP_POLICER_MIN_BURST) 706 707 static const struct devlink_trap_policer nsim_trap_policers_arr[] = { 708 NSIM_TRAP_POLICER(1, 1000, 128), 709 NSIM_TRAP_POLICER(2, 2000, 256), 710 NSIM_TRAP_POLICER(3, 3000, 512), 711 }; 712 713 static const struct devlink_trap_group nsim_trap_groups_arr[] = { 714 DEVLINK_TRAP_GROUP_GENERIC(L2_DROPS, 0), 715 DEVLINK_TRAP_GROUP_GENERIC(L3_DROPS, 1), 716 DEVLINK_TRAP_GROUP_GENERIC(L3_EXCEPTIONS, 1), 717 DEVLINK_TRAP_GROUP_GENERIC(BUFFER_DROPS, 2), 718 DEVLINK_TRAP_GROUP_GENERIC(ACL_DROPS, 3), 719 DEVLINK_TRAP_GROUP_GENERIC(MC_SNOOPING, 3), 720 }; 721 722 static const struct devlink_trap nsim_traps_arr[] = { 723 NSIM_TRAP_DROP(SMAC_MC, L2_DROPS), 724 NSIM_TRAP_DROP(VLAN_TAG_MISMATCH, L2_DROPS), 725 NSIM_TRAP_DROP(INGRESS_VLAN_FILTER, L2_DROPS), 726 NSIM_TRAP_DROP(INGRESS_STP_FILTER, L2_DROPS), 727 NSIM_TRAP_DROP(EMPTY_TX_LIST, L2_DROPS), 728 NSIM_TRAP_DROP(PORT_LOOPBACK_FILTER, L2_DROPS), 729 NSIM_TRAP_DRIVER_EXCEPTION(FID_MISS, L2_DROPS), 730 NSIM_TRAP_DROP(BLACKHOLE_ROUTE, L3_DROPS), 731 NSIM_TRAP_EXCEPTION(TTL_ERROR, L3_EXCEPTIONS), 732 NSIM_TRAP_DROP(TAIL_DROP, BUFFER_DROPS), 733 NSIM_TRAP_DROP_EXT(INGRESS_FLOW_ACTION_DROP, ACL_DROPS, 734 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE), 735 NSIM_TRAP_DROP_EXT(EGRESS_FLOW_ACTION_DROP, ACL_DROPS, 736 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE), 737 NSIM_TRAP_CONTROL(IGMP_QUERY, MC_SNOOPING, MIRROR), 738 NSIM_TRAP_CONTROL(IGMP_V1_REPORT, MC_SNOOPING, TRAP), 739 }; 740 741 #define NSIM_TRAP_L4_DATA_LEN 100 742 743 static struct sk_buff *nsim_dev_trap_skb_build(void) 744 { 745 int tot_len, data_len = NSIM_TRAP_L4_DATA_LEN; 746 struct sk_buff *skb; 747 struct udphdr *udph; 748 struct ethhdr *eth; 749 struct iphdr *iph; 750 751 skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); 752 if (!skb) 753 return NULL; 754 tot_len = sizeof(struct iphdr) + sizeof(struct udphdr) + data_len; 755 756 skb_reset_mac_header(skb); 757 eth = skb_put(skb, sizeof(struct ethhdr)); 758 eth_random_addr(eth->h_dest); 759 eth_random_addr(eth->h_source); 760 eth->h_proto = htons(ETH_P_IP); 761 skb->protocol = htons(ETH_P_IP); 762 763 skb_set_network_header(skb, skb->len); 764 iph = skb_put(skb, sizeof(struct iphdr)); 765 iph->protocol = IPPROTO_UDP; 766 iph->saddr = in_aton("192.0.2.1"); 767 iph->daddr = in_aton("198.51.100.1"); 768 iph->version = 0x4; 769 iph->frag_off = 0; 770 iph->ihl = 0x5; 771 iph->tot_len = htons(tot_len); 772 iph->ttl = 100; 773 iph->check = 0; 774 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl); 775 776 skb_set_transport_header(skb, skb->len); 777 udph = skb_put_zero(skb, sizeof(struct udphdr) + data_len); 778 get_random_bytes(&udph->source, sizeof(u16)); 779 get_random_bytes(&udph->dest, sizeof(u16)); 780 udph->len = htons(sizeof(struct udphdr) + data_len); 781 782 return skb; 783 } 784 785 static void nsim_dev_trap_report(struct nsim_dev_port *nsim_dev_port) 786 { 787 struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev; 788 struct devlink *devlink = priv_to_devlink(nsim_dev); 789 struct nsim_trap_data *nsim_trap_data; 790 int i; 791 792 nsim_trap_data = nsim_dev->trap_data; 793 794 spin_lock(&nsim_trap_data->trap_lock); 795 for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) { 796 struct flow_action_cookie *fa_cookie = NULL; 797 struct nsim_trap_item *nsim_trap_item; 798 struct sk_buff *skb; 799 bool has_fa_cookie; 800 801 has_fa_cookie = nsim_traps_arr[i].metadata_cap & 802 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE; 803 804 nsim_trap_item = &nsim_trap_data->trap_items_arr[i]; 805 if (nsim_trap_item->action == DEVLINK_TRAP_ACTION_DROP) 806 continue; 807 808 skb = nsim_dev_trap_skb_build(); 809 if (!skb) 810 continue; 811 skb->dev = nsim_dev_port->ns->netdev; 812 813 /* Trapped packets are usually passed to devlink in softIRQ, 814 * but in this case they are generated in a workqueue. Disable 815 * softIRQs to prevent lockdep from complaining about 816 * "incosistent lock state". 817 */ 818 819 spin_lock_bh(&nsim_dev->fa_cookie_lock); 820 fa_cookie = has_fa_cookie ? nsim_dev->fa_cookie : NULL; 821 devlink_trap_report(devlink, skb, nsim_trap_item->trap_ctx, 822 &nsim_dev_port->devlink_port, fa_cookie); 823 spin_unlock_bh(&nsim_dev->fa_cookie_lock); 824 consume_skb(skb); 825 } 826 spin_unlock(&nsim_trap_data->trap_lock); 827 } 828 829 #define NSIM_TRAP_REPORT_INTERVAL_MS 100 830 831 static void nsim_dev_trap_report_work(struct work_struct *work) 832 { 833 struct nsim_trap_data *nsim_trap_data; 834 struct nsim_dev_port *nsim_dev_port; 835 struct nsim_dev *nsim_dev; 836 837 nsim_trap_data = container_of(work, struct nsim_trap_data, 838 trap_report_dw.work); 839 nsim_dev = nsim_trap_data->nsim_dev; 840 841 /* For each running port and enabled packet trap, generate a UDP 842 * packet with a random 5-tuple and report it. 843 */ 844 if (!devl_trylock(priv_to_devlink(nsim_dev))) { 845 schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw, 0); 846 return; 847 } 848 849 list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list) { 850 if (!netif_running(nsim_dev_port->ns->netdev)) 851 continue; 852 853 nsim_dev_trap_report(nsim_dev_port); 854 } 855 devl_unlock(priv_to_devlink(nsim_dev)); 856 857 schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw, 858 msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS)); 859 } 860 861 static int nsim_dev_traps_init(struct devlink *devlink) 862 { 863 size_t policers_count = ARRAY_SIZE(nsim_trap_policers_arr); 864 struct nsim_dev *nsim_dev = devlink_priv(devlink); 865 struct nsim_trap_data *nsim_trap_data; 866 int err; 867 868 nsim_trap_data = kzalloc(sizeof(*nsim_trap_data), GFP_KERNEL); 869 if (!nsim_trap_data) 870 return -ENOMEM; 871 872 nsim_trap_data->trap_items_arr = kcalloc(ARRAY_SIZE(nsim_traps_arr), 873 sizeof(struct nsim_trap_item), 874 GFP_KERNEL); 875 if (!nsim_trap_data->trap_items_arr) { 876 err = -ENOMEM; 877 goto err_trap_data_free; 878 } 879 880 nsim_trap_data->trap_policers_cnt_arr = kcalloc(policers_count, 881 sizeof(u64), 882 GFP_KERNEL); 883 if (!nsim_trap_data->trap_policers_cnt_arr) { 884 err = -ENOMEM; 885 goto err_trap_items_free; 886 } 887 888 /* The lock is used to protect the action state of the registered 889 * traps. The value is written by user and read in delayed work when 890 * iterating over all the traps. 891 */ 892 spin_lock_init(&nsim_trap_data->trap_lock); 893 nsim_trap_data->nsim_dev = nsim_dev; 894 nsim_dev->trap_data = nsim_trap_data; 895 896 err = devl_trap_policers_register(devlink, nsim_trap_policers_arr, 897 policers_count); 898 if (err) 899 goto err_trap_policers_cnt_free; 900 901 err = devl_trap_groups_register(devlink, nsim_trap_groups_arr, 902 ARRAY_SIZE(nsim_trap_groups_arr)); 903 if (err) 904 goto err_trap_policers_unregister; 905 906 err = devl_traps_register(devlink, nsim_traps_arr, 907 ARRAY_SIZE(nsim_traps_arr), NULL); 908 if (err) 909 goto err_trap_groups_unregister; 910 911 INIT_DELAYED_WORK(&nsim_dev->trap_data->trap_report_dw, 912 nsim_dev_trap_report_work); 913 schedule_delayed_work(&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 = nsim_dev_resources_register(devlink); 1560 if (err) 1561 goto err_vfc_free; 1562 1563 err = devlink_params_register(devlink, nsim_devlink_params, 1564 ARRAY_SIZE(nsim_devlink_params)); 1565 if (err) 1566 goto err_dl_unregister; 1567 nsim_devlink_set_params_init_values(nsim_dev, devlink); 1568 1569 err = nsim_dev_dummy_region_init(nsim_dev, devlink); 1570 if (err) 1571 goto err_params_unregister; 1572 1573 err = nsim_dev_traps_init(devlink); 1574 if (err) 1575 goto err_dummy_region_exit; 1576 1577 err = nsim_dev_debugfs_init(nsim_dev); 1578 if (err) 1579 goto err_traps_exit; 1580 1581 nsim_dev->fib_data = nsim_fib_create(devlink, NULL); 1582 if (IS_ERR(nsim_dev->fib_data)) { 1583 err = PTR_ERR(nsim_dev->fib_data); 1584 goto err_debugfs_exit; 1585 } 1586 1587 err = nsim_dev_health_init(nsim_dev, devlink); 1588 if (err) 1589 goto err_fib_destroy; 1590 1591 err = nsim_bpf_dev_init(nsim_dev); 1592 if (err) 1593 goto err_health_exit; 1594 1595 err = nsim_dev_psample_init(nsim_dev); 1596 if (err) 1597 goto err_bpf_dev_exit; 1598 1599 err = nsim_dev_hwstats_init(nsim_dev); 1600 if (err) 1601 goto err_psample_exit; 1602 1603 err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count); 1604 if (err) 1605 goto err_hwstats_exit; 1606 1607 nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_LEGACY; 1608 devlink_set_features(devlink, DEVLINK_F_RELOAD); 1609 devl_unlock(devlink); 1610 devlink_register(devlink); 1611 return 0; 1612 1613 err_hwstats_exit: 1614 nsim_dev_hwstats_exit(nsim_dev); 1615 err_psample_exit: 1616 nsim_dev_psample_exit(nsim_dev); 1617 err_bpf_dev_exit: 1618 nsim_bpf_dev_exit(nsim_dev); 1619 err_health_exit: 1620 nsim_dev_health_exit(nsim_dev); 1621 err_fib_destroy: 1622 nsim_fib_destroy(devlink, nsim_dev->fib_data); 1623 err_debugfs_exit: 1624 nsim_dev_debugfs_exit(nsim_dev); 1625 err_traps_exit: 1626 nsim_dev_traps_exit(devlink); 1627 err_dummy_region_exit: 1628 nsim_dev_dummy_region_exit(nsim_dev); 1629 err_params_unregister: 1630 devlink_params_unregister(devlink, nsim_devlink_params, 1631 ARRAY_SIZE(nsim_devlink_params)); 1632 err_dl_unregister: 1633 devl_resources_unregister(devlink); 1634 err_vfc_free: 1635 kfree(nsim_dev->vfconfigs); 1636 err_devlink_unlock: 1637 devl_unlock(devlink); 1638 devlink_free(devlink); 1639 dev_set_drvdata(&nsim_bus_dev->dev, NULL); 1640 return err; 1641 } 1642 1643 static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev) 1644 { 1645 struct devlink *devlink = priv_to_devlink(nsim_dev); 1646 1647 if (devlink_is_reload_failed(devlink)) 1648 return; 1649 debugfs_remove(nsim_dev->take_snapshot); 1650 1651 if (nsim_dev_get_vfs(nsim_dev)) { 1652 nsim_bus_dev_set_vfs(nsim_dev->nsim_bus_dev, 0); 1653 if (nsim_esw_mode_is_switchdev(nsim_dev)) 1654 nsim_esw_legacy_enable(nsim_dev, NULL); 1655 } 1656 1657 nsim_dev_port_del_all(nsim_dev); 1658 nsim_dev_hwstats_exit(nsim_dev); 1659 nsim_dev_psample_exit(nsim_dev); 1660 nsim_dev_health_exit(nsim_dev); 1661 nsim_fib_destroy(devlink, nsim_dev->fib_data); 1662 nsim_dev_traps_exit(devlink); 1663 nsim_dev_dummy_region_exit(nsim_dev); 1664 } 1665 1666 void nsim_drv_remove(struct nsim_bus_dev *nsim_bus_dev) 1667 { 1668 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); 1669 struct devlink *devlink = priv_to_devlink(nsim_dev); 1670 1671 devlink_unregister(devlink); 1672 devl_lock(devlink); 1673 nsim_dev_reload_destroy(nsim_dev); 1674 1675 nsim_bpf_dev_exit(nsim_dev); 1676 nsim_dev_debugfs_exit(nsim_dev); 1677 devlink_params_unregister(devlink, nsim_devlink_params, 1678 ARRAY_SIZE(nsim_devlink_params)); 1679 devl_resources_unregister(devlink); 1680 kfree(nsim_dev->vfconfigs); 1681 kfree(nsim_dev->fa_cookie); 1682 devl_unlock(devlink); 1683 devlink_free(devlink); 1684 dev_set_drvdata(&nsim_bus_dev->dev, NULL); 1685 } 1686 1687 static struct nsim_dev_port * 1688 __nsim_dev_port_lookup(struct nsim_dev *nsim_dev, enum nsim_dev_port_type type, 1689 unsigned int port_index) 1690 { 1691 struct nsim_dev_port *nsim_dev_port; 1692 1693 port_index = nsim_dev_port_index(type, port_index); 1694 list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list) 1695 if (nsim_dev_port->port_index == port_index) 1696 return nsim_dev_port; 1697 return NULL; 1698 } 1699 1700 int nsim_drv_port_add(struct nsim_bus_dev *nsim_bus_dev, enum nsim_dev_port_type type, 1701 unsigned int port_index) 1702 { 1703 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); 1704 int err; 1705 1706 devl_lock(priv_to_devlink(nsim_dev)); 1707 if (__nsim_dev_port_lookup(nsim_dev, type, port_index)) 1708 err = -EEXIST; 1709 else 1710 err = __nsim_dev_port_add(nsim_dev, type, port_index); 1711 devl_unlock(priv_to_devlink(nsim_dev)); 1712 return err; 1713 } 1714 1715 int nsim_drv_port_del(struct nsim_bus_dev *nsim_bus_dev, enum nsim_dev_port_type type, 1716 unsigned int port_index) 1717 { 1718 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); 1719 struct nsim_dev_port *nsim_dev_port; 1720 int err = 0; 1721 1722 devl_lock(priv_to_devlink(nsim_dev)); 1723 nsim_dev_port = __nsim_dev_port_lookup(nsim_dev, type, port_index); 1724 if (!nsim_dev_port) 1725 err = -ENOENT; 1726 else 1727 __nsim_dev_port_del(nsim_dev_port); 1728 devl_unlock(priv_to_devlink(nsim_dev)); 1729 return err; 1730 } 1731 1732 int nsim_drv_configure_vfs(struct nsim_bus_dev *nsim_bus_dev, 1733 unsigned int num_vfs) 1734 { 1735 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); 1736 struct devlink *devlink = priv_to_devlink(nsim_dev); 1737 int ret = 0; 1738 1739 devl_lock(devlink); 1740 if (nsim_bus_dev->num_vfs == num_vfs) 1741 goto exit_unlock; 1742 if (nsim_bus_dev->num_vfs && num_vfs) { 1743 ret = -EBUSY; 1744 goto exit_unlock; 1745 } 1746 if (nsim_bus_dev->max_vfs < num_vfs) { 1747 ret = -ENOMEM; 1748 goto exit_unlock; 1749 } 1750 1751 nsim_bus_dev_set_vfs(nsim_bus_dev, num_vfs); 1752 if (nsim_esw_mode_is_switchdev(nsim_dev)) { 1753 if (num_vfs) { 1754 ret = nsim_esw_switchdev_enable(nsim_dev, NULL); 1755 if (ret) { 1756 nsim_bus_dev_set_vfs(nsim_bus_dev, 0); 1757 goto exit_unlock; 1758 } 1759 } else { 1760 nsim_esw_legacy_enable(nsim_dev, NULL); 1761 } 1762 } 1763 1764 exit_unlock: 1765 devl_unlock(devlink); 1766 1767 return ret; 1768 } 1769 1770 int nsim_dev_init(void) 1771 { 1772 nsim_dev_ddir = debugfs_create_dir(DRV_NAME, NULL); 1773 return PTR_ERR_OR_ZERO(nsim_dev_ddir); 1774 } 1775 1776 void nsim_dev_exit(void) 1777 { 1778 debugfs_remove_recursive(nsim_dev_ddir); 1779 } 1780