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 void nsim_dev_tc_bw_debugfs_init(struct dentry *ddir, u32 *tc_bw) 392 { 393 int i; 394 395 for (i = 0; i < DEVLINK_RATE_TCS_MAX; i++) { 396 char name[16]; 397 398 snprintf(name, sizeof(name), "tc%d_bw", i); 399 debugfs_create_u32(name, 0400, ddir, &tc_bw[i]); 400 } 401 } 402 static int nsim_dev_port_debugfs_init(struct nsim_dev *nsim_dev, 403 struct nsim_dev_port *nsim_dev_port) 404 { 405 struct nsim_bus_dev *nsim_bus_dev = nsim_dev->nsim_bus_dev; 406 unsigned int port_index = nsim_dev_port->port_index; 407 char port_ddir_name[16]; 408 char dev_link_name[32]; 409 410 sprintf(port_ddir_name, "%u", port_index); 411 nsim_dev_port->ddir = debugfs_create_dir(port_ddir_name, 412 nsim_dev->ports_ddir); 413 if (IS_ERR(nsim_dev_port->ddir)) 414 return PTR_ERR(nsim_dev_port->ddir); 415 416 sprintf(dev_link_name, "../../../" DRV_NAME "%u", nsim_bus_dev->dev.id); 417 if (nsim_dev_port_is_vf(nsim_dev_port)) { 418 unsigned int vf_id = nsim_dev_port_index_to_vf_index(port_index); 419 420 debugfs_create_u16("tx_share", 0400, nsim_dev_port->ddir, 421 &nsim_dev->vfconfigs[vf_id].min_tx_rate); 422 debugfs_create_u16("tx_max", 0400, nsim_dev_port->ddir, 423 &nsim_dev->vfconfigs[vf_id].max_tx_rate); 424 nsim_dev_port->rate_parent = debugfs_create_file("rate_parent", 425 0400, 426 nsim_dev_port->ddir, 427 &nsim_dev_port->parent_name, 428 &nsim_dev_rate_parent_fops); 429 nsim_dev_tc_bw_debugfs_init(nsim_dev_port->ddir, 430 nsim_dev_port->tc_bw); 431 } 432 debugfs_create_symlink("dev", nsim_dev_port->ddir, dev_link_name); 433 434 return 0; 435 } 436 437 static void nsim_dev_port_debugfs_exit(struct nsim_dev_port *nsim_dev_port) 438 { 439 debugfs_remove_recursive(nsim_dev_port->ddir); 440 } 441 442 static int nsim_dev_resources_register(struct devlink *devlink) 443 { 444 struct devlink_resource_size_params params = { 445 .size_max = (u64)-1, 446 .size_granularity = 1, 447 .unit = DEVLINK_RESOURCE_UNIT_ENTRY 448 }; 449 int err; 450 451 /* Resources for IPv4 */ 452 err = devl_resource_register(devlink, "IPv4", (u64)-1, 453 NSIM_RESOURCE_IPV4, 454 DEVLINK_RESOURCE_ID_PARENT_TOP, 455 ¶ms); 456 if (err) { 457 pr_err("Failed to register IPv4 top resource\n"); 458 goto err_out; 459 } 460 461 err = devl_resource_register(devlink, "fib", (u64)-1, 462 NSIM_RESOURCE_IPV4_FIB, 463 NSIM_RESOURCE_IPV4, ¶ms); 464 if (err) { 465 pr_err("Failed to register IPv4 FIB resource\n"); 466 goto err_out; 467 } 468 469 err = devl_resource_register(devlink, "fib-rules", (u64)-1, 470 NSIM_RESOURCE_IPV4_FIB_RULES, 471 NSIM_RESOURCE_IPV4, ¶ms); 472 if (err) { 473 pr_err("Failed to register IPv4 FIB rules resource\n"); 474 goto err_out; 475 } 476 477 /* Resources for IPv6 */ 478 err = devl_resource_register(devlink, "IPv6", (u64)-1, 479 NSIM_RESOURCE_IPV6, 480 DEVLINK_RESOURCE_ID_PARENT_TOP, 481 ¶ms); 482 if (err) { 483 pr_err("Failed to register IPv6 top resource\n"); 484 goto err_out; 485 } 486 487 err = devl_resource_register(devlink, "fib", (u64)-1, 488 NSIM_RESOURCE_IPV6_FIB, 489 NSIM_RESOURCE_IPV6, ¶ms); 490 if (err) { 491 pr_err("Failed to register IPv6 FIB resource\n"); 492 goto err_out; 493 } 494 495 err = devl_resource_register(devlink, "fib-rules", (u64)-1, 496 NSIM_RESOURCE_IPV6_FIB_RULES, 497 NSIM_RESOURCE_IPV6, ¶ms); 498 if (err) { 499 pr_err("Failed to register IPv6 FIB rules resource\n"); 500 goto err_out; 501 } 502 503 /* Resources for nexthops */ 504 err = devl_resource_register(devlink, "nexthops", (u64)-1, 505 NSIM_RESOURCE_NEXTHOPS, 506 DEVLINK_RESOURCE_ID_PARENT_TOP, 507 ¶ms); 508 if (err) { 509 pr_err("Failed to register NEXTHOPS resource\n"); 510 goto err_out; 511 } 512 return 0; 513 514 err_out: 515 devl_resources_unregister(devlink); 516 return err; 517 } 518 519 enum nsim_devlink_param_id { 520 NSIM_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX, 521 NSIM_DEVLINK_PARAM_ID_TEST1, 522 }; 523 524 static const struct devlink_param nsim_devlink_params[] = { 525 DEVLINK_PARAM_GENERIC(MAX_MACS, 526 BIT(DEVLINK_PARAM_CMODE_DRIVERINIT), 527 NULL, NULL, NULL), 528 DEVLINK_PARAM_DRIVER(NSIM_DEVLINK_PARAM_ID_TEST1, 529 "test1", DEVLINK_PARAM_TYPE_BOOL, 530 BIT(DEVLINK_PARAM_CMODE_DRIVERINIT), 531 NULL, NULL, NULL), 532 }; 533 534 static void nsim_devlink_set_params_init_values(struct nsim_dev *nsim_dev, 535 struct devlink *devlink) 536 { 537 union devlink_param_value value; 538 539 value.vu32 = nsim_dev->max_macs; 540 devl_param_driverinit_value_set(devlink, 541 DEVLINK_PARAM_GENERIC_ID_MAX_MACS, 542 value); 543 value.vbool = nsim_dev->test1; 544 devl_param_driverinit_value_set(devlink, 545 NSIM_DEVLINK_PARAM_ID_TEST1, 546 value); 547 } 548 549 static void nsim_devlink_param_load_driverinit_values(struct devlink *devlink) 550 { 551 struct nsim_dev *nsim_dev = devlink_priv(devlink); 552 union devlink_param_value saved_value; 553 int err; 554 555 err = devl_param_driverinit_value_get(devlink, 556 DEVLINK_PARAM_GENERIC_ID_MAX_MACS, 557 &saved_value); 558 if (!err) 559 nsim_dev->max_macs = saved_value.vu32; 560 err = devl_param_driverinit_value_get(devlink, 561 NSIM_DEVLINK_PARAM_ID_TEST1, 562 &saved_value); 563 if (!err) 564 nsim_dev->test1 = saved_value.vbool; 565 } 566 567 #define NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX 16 568 569 static const struct devlink_region_ops dummy_region_ops = { 570 .name = "dummy", 571 .destructor = &kfree, 572 .snapshot = nsim_dev_take_snapshot, 573 }; 574 575 static int nsim_dev_dummy_region_init(struct nsim_dev *nsim_dev, 576 struct devlink *devlink) 577 { 578 nsim_dev->dummy_region = 579 devl_region_create(devlink, &dummy_region_ops, 580 NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX, 581 NSIM_DEV_DUMMY_REGION_SIZE); 582 return PTR_ERR_OR_ZERO(nsim_dev->dummy_region); 583 } 584 585 static void nsim_dev_dummy_region_exit(struct nsim_dev *nsim_dev) 586 { 587 devl_region_destroy(nsim_dev->dummy_region); 588 } 589 590 static int 591 __nsim_dev_port_add(struct nsim_dev *nsim_dev, enum nsim_dev_port_type type, 592 unsigned int port_index); 593 static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port); 594 595 static int nsim_esw_legacy_enable(struct nsim_dev *nsim_dev, 596 struct netlink_ext_ack *extack) 597 { 598 struct devlink *devlink = priv_to_devlink(nsim_dev); 599 struct nsim_dev_port *nsim_dev_port, *tmp; 600 601 devl_rate_nodes_destroy(devlink); 602 list_for_each_entry_safe(nsim_dev_port, tmp, &nsim_dev->port_list, list) 603 if (nsim_dev_port_is_vf(nsim_dev_port)) 604 __nsim_dev_port_del(nsim_dev_port); 605 nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_LEGACY; 606 return 0; 607 } 608 609 static int nsim_esw_switchdev_enable(struct nsim_dev *nsim_dev, 610 struct netlink_ext_ack *extack) 611 { 612 struct nsim_dev_port *nsim_dev_port, *tmp; 613 int i, err; 614 615 for (i = 0; i < nsim_dev_get_vfs(nsim_dev); i++) { 616 err = __nsim_dev_port_add(nsim_dev, NSIM_DEV_PORT_TYPE_VF, i); 617 if (err) { 618 NL_SET_ERR_MSG_MOD(extack, "Failed to initialize VFs' netdevsim ports"); 619 pr_err("Failed to initialize VF id=%d. %d.\n", i, err); 620 goto err_port_add_vfs; 621 } 622 } 623 nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_SWITCHDEV; 624 return 0; 625 626 err_port_add_vfs: 627 list_for_each_entry_safe(nsim_dev_port, tmp, &nsim_dev->port_list, list) 628 if (nsim_dev_port_is_vf(nsim_dev_port)) 629 __nsim_dev_port_del(nsim_dev_port); 630 return err; 631 } 632 633 static int nsim_devlink_eswitch_mode_set(struct devlink *devlink, u16 mode, 634 struct netlink_ext_ack *extack) 635 { 636 struct nsim_dev *nsim_dev = devlink_priv(devlink); 637 638 if (mode == nsim_dev->esw_mode) 639 return 0; 640 641 if (mode == DEVLINK_ESWITCH_MODE_LEGACY) 642 return nsim_esw_legacy_enable(nsim_dev, extack); 643 if (mode == DEVLINK_ESWITCH_MODE_SWITCHDEV) 644 return nsim_esw_switchdev_enable(nsim_dev, extack); 645 646 return -EINVAL; 647 } 648 649 static int nsim_devlink_eswitch_mode_get(struct devlink *devlink, u16 *mode) 650 { 651 struct nsim_dev *nsim_dev = devlink_priv(devlink); 652 653 *mode = nsim_dev->esw_mode; 654 return 0; 655 } 656 657 struct nsim_trap_item { 658 void *trap_ctx; 659 enum devlink_trap_action action; 660 }; 661 662 struct nsim_trap_data { 663 struct delayed_work trap_report_dw; 664 struct nsim_trap_item *trap_items_arr; 665 u64 *trap_policers_cnt_arr; 666 u64 trap_pkt_cnt; 667 struct nsim_dev *nsim_dev; 668 spinlock_t trap_lock; /* Protects trap_items_arr */ 669 }; 670 671 /* All driver-specific traps must be documented in 672 * Documentation/networking/devlink/netdevsim.rst 673 */ 674 enum { 675 NSIM_TRAP_ID_BASE = DEVLINK_TRAP_GENERIC_ID_MAX, 676 NSIM_TRAP_ID_FID_MISS, 677 }; 678 679 #define NSIM_TRAP_NAME_FID_MISS "fid_miss" 680 681 #define NSIM_TRAP_METADATA DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT 682 683 #define NSIM_TRAP_DROP(_id, _group_id) \ 684 DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \ 685 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ 686 NSIM_TRAP_METADATA) 687 #define NSIM_TRAP_DROP_EXT(_id, _group_id, _metadata) \ 688 DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \ 689 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ 690 NSIM_TRAP_METADATA | (_metadata)) 691 #define NSIM_TRAP_EXCEPTION(_id, _group_id) \ 692 DEVLINK_TRAP_GENERIC(EXCEPTION, TRAP, _id, \ 693 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ 694 NSIM_TRAP_METADATA) 695 #define NSIM_TRAP_CONTROL(_id, _group_id, _action) \ 696 DEVLINK_TRAP_GENERIC(CONTROL, _action, _id, \ 697 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ 698 NSIM_TRAP_METADATA) 699 #define NSIM_TRAP_DRIVER_EXCEPTION(_id, _group_id) \ 700 DEVLINK_TRAP_DRIVER(EXCEPTION, TRAP, NSIM_TRAP_ID_##_id, \ 701 NSIM_TRAP_NAME_##_id, \ 702 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ 703 NSIM_TRAP_METADATA) 704 705 #define NSIM_DEV_TRAP_POLICER_MIN_RATE 1 706 #define NSIM_DEV_TRAP_POLICER_MAX_RATE 8000 707 #define NSIM_DEV_TRAP_POLICER_MIN_BURST 8 708 #define NSIM_DEV_TRAP_POLICER_MAX_BURST 65536 709 710 #define NSIM_TRAP_POLICER(_id, _rate, _burst) \ 711 DEVLINK_TRAP_POLICER(_id, _rate, _burst, \ 712 NSIM_DEV_TRAP_POLICER_MAX_RATE, \ 713 NSIM_DEV_TRAP_POLICER_MIN_RATE, \ 714 NSIM_DEV_TRAP_POLICER_MAX_BURST, \ 715 NSIM_DEV_TRAP_POLICER_MIN_BURST) 716 717 static const struct devlink_trap_policer nsim_trap_policers_arr[] = { 718 NSIM_TRAP_POLICER(1, 1000, 128), 719 NSIM_TRAP_POLICER(2, 2000, 256), 720 NSIM_TRAP_POLICER(3, 3000, 512), 721 }; 722 723 static const struct devlink_trap_group nsim_trap_groups_arr[] = { 724 DEVLINK_TRAP_GROUP_GENERIC(L2_DROPS, 0), 725 DEVLINK_TRAP_GROUP_GENERIC(L3_DROPS, 1), 726 DEVLINK_TRAP_GROUP_GENERIC(L3_EXCEPTIONS, 1), 727 DEVLINK_TRAP_GROUP_GENERIC(BUFFER_DROPS, 2), 728 DEVLINK_TRAP_GROUP_GENERIC(ACL_DROPS, 3), 729 DEVLINK_TRAP_GROUP_GENERIC(MC_SNOOPING, 3), 730 }; 731 732 static const struct devlink_trap nsim_traps_arr[] = { 733 NSIM_TRAP_DROP(SMAC_MC, L2_DROPS), 734 NSIM_TRAP_DROP(VLAN_TAG_MISMATCH, L2_DROPS), 735 NSIM_TRAP_DROP(INGRESS_VLAN_FILTER, L2_DROPS), 736 NSIM_TRAP_DROP(INGRESS_STP_FILTER, L2_DROPS), 737 NSIM_TRAP_DROP(EMPTY_TX_LIST, L2_DROPS), 738 NSIM_TRAP_DROP(PORT_LOOPBACK_FILTER, L2_DROPS), 739 NSIM_TRAP_DRIVER_EXCEPTION(FID_MISS, L2_DROPS), 740 NSIM_TRAP_DROP(BLACKHOLE_ROUTE, L3_DROPS), 741 NSIM_TRAP_EXCEPTION(TTL_ERROR, L3_EXCEPTIONS), 742 NSIM_TRAP_DROP(TAIL_DROP, BUFFER_DROPS), 743 NSIM_TRAP_DROP_EXT(INGRESS_FLOW_ACTION_DROP, ACL_DROPS, 744 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE), 745 NSIM_TRAP_DROP_EXT(EGRESS_FLOW_ACTION_DROP, ACL_DROPS, 746 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE), 747 NSIM_TRAP_CONTROL(IGMP_QUERY, MC_SNOOPING, MIRROR), 748 NSIM_TRAP_CONTROL(IGMP_V1_REPORT, MC_SNOOPING, TRAP), 749 }; 750 751 #define NSIM_TRAP_L4_DATA_LEN 100 752 753 static struct sk_buff *nsim_dev_trap_skb_build(void) 754 { 755 int tot_len, data_len = NSIM_TRAP_L4_DATA_LEN; 756 struct sk_buff *skb; 757 struct udphdr *udph; 758 struct ethhdr *eth; 759 struct iphdr *iph; 760 761 skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); 762 if (!skb) 763 return NULL; 764 tot_len = sizeof(struct iphdr) + sizeof(struct udphdr) + data_len; 765 766 skb_reset_mac_header(skb); 767 eth = skb_put(skb, sizeof(struct ethhdr)); 768 eth_random_addr(eth->h_dest); 769 eth_random_addr(eth->h_source); 770 eth->h_proto = htons(ETH_P_IP); 771 skb->protocol = htons(ETH_P_IP); 772 773 skb_set_network_header(skb, skb->len); 774 iph = skb_put(skb, sizeof(struct iphdr)); 775 iph->protocol = IPPROTO_UDP; 776 iph->saddr = in_aton("192.0.2.1"); 777 iph->daddr = in_aton("198.51.100.1"); 778 iph->version = 0x4; 779 iph->frag_off = 0; 780 iph->ihl = 0x5; 781 iph->tot_len = htons(tot_len); 782 iph->ttl = 100; 783 iph->check = 0; 784 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl); 785 786 skb_set_transport_header(skb, skb->len); 787 udph = skb_put_zero(skb, sizeof(struct udphdr) + data_len); 788 get_random_bytes(&udph->source, sizeof(u16)); 789 get_random_bytes(&udph->dest, sizeof(u16)); 790 udph->len = htons(sizeof(struct udphdr) + data_len); 791 792 return skb; 793 } 794 795 static void nsim_dev_trap_report(struct nsim_dev_port *nsim_dev_port) 796 { 797 struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev; 798 struct devlink *devlink = priv_to_devlink(nsim_dev); 799 struct nsim_trap_data *nsim_trap_data; 800 int i; 801 802 nsim_trap_data = nsim_dev->trap_data; 803 804 spin_lock(&nsim_trap_data->trap_lock); 805 for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) { 806 struct flow_action_cookie *fa_cookie = NULL; 807 struct nsim_trap_item *nsim_trap_item; 808 struct sk_buff *skb; 809 bool has_fa_cookie; 810 811 has_fa_cookie = nsim_traps_arr[i].metadata_cap & 812 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE; 813 814 nsim_trap_item = &nsim_trap_data->trap_items_arr[i]; 815 if (nsim_trap_item->action == DEVLINK_TRAP_ACTION_DROP) 816 continue; 817 818 skb = nsim_dev_trap_skb_build(); 819 if (!skb) 820 continue; 821 skb->dev = nsim_dev_port->ns->netdev; 822 823 /* Trapped packets are usually passed to devlink in softIRQ, 824 * but in this case they are generated in a workqueue. Disable 825 * softIRQs to prevent lockdep from complaining about 826 * "incosistent lock state". 827 */ 828 829 spin_lock_bh(&nsim_dev->fa_cookie_lock); 830 fa_cookie = has_fa_cookie ? nsim_dev->fa_cookie : NULL; 831 devlink_trap_report(devlink, skb, nsim_trap_item->trap_ctx, 832 &nsim_dev_port->devlink_port, fa_cookie); 833 spin_unlock_bh(&nsim_dev->fa_cookie_lock); 834 consume_skb(skb); 835 } 836 spin_unlock(&nsim_trap_data->trap_lock); 837 } 838 839 #define NSIM_TRAP_REPORT_INTERVAL_MS 100 840 841 static void nsim_dev_trap_report_work(struct work_struct *work) 842 { 843 struct nsim_trap_data *nsim_trap_data; 844 struct nsim_dev_port *nsim_dev_port; 845 struct nsim_dev *nsim_dev; 846 847 nsim_trap_data = container_of(work, struct nsim_trap_data, 848 trap_report_dw.work); 849 nsim_dev = nsim_trap_data->nsim_dev; 850 851 if (!devl_trylock(priv_to_devlink(nsim_dev))) { 852 queue_delayed_work(system_unbound_wq, 853 &nsim_dev->trap_data->trap_report_dw, 1); 854 return; 855 } 856 857 /* For each running port and enabled packet trap, generate a UDP 858 * packet with a random 5-tuple and report it. 859 */ 860 list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list) { 861 if (!netif_running(nsim_dev_port->ns->netdev)) 862 continue; 863 864 nsim_dev_trap_report(nsim_dev_port); 865 cond_resched(); 866 } 867 devl_unlock(priv_to_devlink(nsim_dev)); 868 queue_delayed_work(system_unbound_wq, 869 &nsim_dev->trap_data->trap_report_dw, 870 msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS)); 871 } 872 873 static int nsim_dev_traps_init(struct devlink *devlink) 874 { 875 size_t policers_count = ARRAY_SIZE(nsim_trap_policers_arr); 876 struct nsim_dev *nsim_dev = devlink_priv(devlink); 877 struct nsim_trap_data *nsim_trap_data; 878 int err; 879 880 nsim_trap_data = kzalloc(sizeof(*nsim_trap_data), GFP_KERNEL); 881 if (!nsim_trap_data) 882 return -ENOMEM; 883 884 nsim_trap_data->trap_items_arr = kcalloc(ARRAY_SIZE(nsim_traps_arr), 885 sizeof(struct nsim_trap_item), 886 GFP_KERNEL); 887 if (!nsim_trap_data->trap_items_arr) { 888 err = -ENOMEM; 889 goto err_trap_data_free; 890 } 891 892 nsim_trap_data->trap_policers_cnt_arr = kcalloc(policers_count, 893 sizeof(u64), 894 GFP_KERNEL); 895 if (!nsim_trap_data->trap_policers_cnt_arr) { 896 err = -ENOMEM; 897 goto err_trap_items_free; 898 } 899 900 /* The lock is used to protect the action state of the registered 901 * traps. The value is written by user and read in delayed work when 902 * iterating over all the traps. 903 */ 904 spin_lock_init(&nsim_trap_data->trap_lock); 905 nsim_trap_data->nsim_dev = nsim_dev; 906 nsim_dev->trap_data = nsim_trap_data; 907 908 err = devl_trap_policers_register(devlink, nsim_trap_policers_arr, 909 policers_count); 910 if (err) 911 goto err_trap_policers_cnt_free; 912 913 err = devl_trap_groups_register(devlink, nsim_trap_groups_arr, 914 ARRAY_SIZE(nsim_trap_groups_arr)); 915 if (err) 916 goto err_trap_policers_unregister; 917 918 err = devl_traps_register(devlink, nsim_traps_arr, 919 ARRAY_SIZE(nsim_traps_arr), NULL); 920 if (err) 921 goto err_trap_groups_unregister; 922 923 INIT_DELAYED_WORK(&nsim_dev->trap_data->trap_report_dw, 924 nsim_dev_trap_report_work); 925 queue_delayed_work(system_unbound_wq, 926 &nsim_dev->trap_data->trap_report_dw, 927 msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS)); 928 929 return 0; 930 931 err_trap_groups_unregister: 932 devl_trap_groups_unregister(devlink, nsim_trap_groups_arr, 933 ARRAY_SIZE(nsim_trap_groups_arr)); 934 err_trap_policers_unregister: 935 devl_trap_policers_unregister(devlink, nsim_trap_policers_arr, 936 ARRAY_SIZE(nsim_trap_policers_arr)); 937 err_trap_policers_cnt_free: 938 kfree(nsim_trap_data->trap_policers_cnt_arr); 939 err_trap_items_free: 940 kfree(nsim_trap_data->trap_items_arr); 941 err_trap_data_free: 942 kfree(nsim_trap_data); 943 return err; 944 } 945 946 static void nsim_dev_traps_exit(struct devlink *devlink) 947 { 948 struct nsim_dev *nsim_dev = devlink_priv(devlink); 949 950 /* caution, trap work takes devlink lock */ 951 cancel_delayed_work_sync(&nsim_dev->trap_data->trap_report_dw); 952 devl_traps_unregister(devlink, nsim_traps_arr, 953 ARRAY_SIZE(nsim_traps_arr)); 954 devl_trap_groups_unregister(devlink, nsim_trap_groups_arr, 955 ARRAY_SIZE(nsim_trap_groups_arr)); 956 devl_trap_policers_unregister(devlink, nsim_trap_policers_arr, 957 ARRAY_SIZE(nsim_trap_policers_arr)); 958 kfree(nsim_dev->trap_data->trap_policers_cnt_arr); 959 kfree(nsim_dev->trap_data->trap_items_arr); 960 kfree(nsim_dev->trap_data); 961 } 962 963 static int nsim_dev_reload_create(struct nsim_dev *nsim_dev, 964 struct netlink_ext_ack *extack); 965 static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev); 966 967 static int nsim_dev_reload_down(struct devlink *devlink, bool netns_change, 968 enum devlink_reload_action action, enum devlink_reload_limit limit, 969 struct netlink_ext_ack *extack) 970 { 971 struct nsim_dev *nsim_dev = devlink_priv(devlink); 972 973 if (nsim_dev->dont_allow_reload) { 974 /* For testing purposes, user set debugfs dont_allow_reload 975 * value to true. So forbid it. 976 */ 977 NL_SET_ERR_MSG_MOD(extack, "User forbid the reload for testing purposes"); 978 return -EOPNOTSUPP; 979 } 980 981 nsim_dev_reload_destroy(nsim_dev); 982 return 0; 983 } 984 985 static int nsim_dev_reload_up(struct devlink *devlink, enum devlink_reload_action action, 986 enum devlink_reload_limit limit, u32 *actions_performed, 987 struct netlink_ext_ack *extack) 988 { 989 struct nsim_dev *nsim_dev = devlink_priv(devlink); 990 991 if (nsim_dev->fail_reload) { 992 /* For testing purposes, user set debugfs fail_reload 993 * value to true. Fail right away. 994 */ 995 NL_SET_ERR_MSG_MOD(extack, "User setup the reload to fail for testing purposes"); 996 return -EINVAL; 997 } 998 999 *actions_performed = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT); 1000 1001 return nsim_dev_reload_create(nsim_dev, extack); 1002 } 1003 1004 static int nsim_dev_info_get(struct devlink *devlink, 1005 struct devlink_info_req *req, 1006 struct netlink_ext_ack *extack) 1007 { 1008 int err; 1009 1010 err = devlink_info_version_stored_put_ext(req, "fw.mgmt", "10.20.30", 1011 DEVLINK_INFO_VERSION_TYPE_COMPONENT); 1012 if (err) 1013 return err; 1014 return devlink_info_version_running_put_ext(req, "fw.mgmt", "10.20.30", 1015 DEVLINK_INFO_VERSION_TYPE_COMPONENT); 1016 } 1017 1018 #define NSIM_DEV_FLASH_SIZE 500000 1019 #define NSIM_DEV_FLASH_CHUNK_SIZE 1000 1020 #define NSIM_DEV_FLASH_CHUNK_TIME_MS 10 1021 1022 static int nsim_dev_flash_update(struct devlink *devlink, 1023 struct devlink_flash_update_params *params, 1024 struct netlink_ext_ack *extack) 1025 { 1026 struct nsim_dev *nsim_dev = devlink_priv(devlink); 1027 int i; 1028 1029 if ((params->overwrite_mask & ~nsim_dev->fw_update_overwrite_mask) != 0) 1030 return -EOPNOTSUPP; 1031 1032 if (nsim_dev->fw_update_status) { 1033 devlink_flash_update_status_notify(devlink, 1034 "Preparing to flash", 1035 params->component, 0, 0); 1036 } 1037 1038 for (i = 0; i < NSIM_DEV_FLASH_SIZE / NSIM_DEV_FLASH_CHUNK_SIZE; i++) { 1039 if (nsim_dev->fw_update_status) 1040 devlink_flash_update_status_notify(devlink, "Flashing", 1041 params->component, 1042 i * NSIM_DEV_FLASH_CHUNK_SIZE, 1043 NSIM_DEV_FLASH_SIZE); 1044 msleep(NSIM_DEV_FLASH_CHUNK_TIME_MS); 1045 } 1046 1047 if (nsim_dev->fw_update_status) { 1048 devlink_flash_update_status_notify(devlink, "Flashing", 1049 params->component, 1050 NSIM_DEV_FLASH_SIZE, 1051 NSIM_DEV_FLASH_SIZE); 1052 devlink_flash_update_timeout_notify(devlink, "Flash select", 1053 params->component, 81); 1054 devlink_flash_update_status_notify(devlink, "Flashing done", 1055 params->component, 0, 0); 1056 } 1057 1058 return 0; 1059 } 1060 1061 static struct nsim_trap_item * 1062 nsim_dev_trap_item_lookup(struct nsim_dev *nsim_dev, u16 trap_id) 1063 { 1064 struct nsim_trap_data *nsim_trap_data = nsim_dev->trap_data; 1065 int i; 1066 1067 for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) { 1068 if (nsim_traps_arr[i].id == trap_id) 1069 return &nsim_trap_data->trap_items_arr[i]; 1070 } 1071 1072 return NULL; 1073 } 1074 1075 static int nsim_dev_devlink_trap_init(struct devlink *devlink, 1076 const struct devlink_trap *trap, 1077 void *trap_ctx) 1078 { 1079 struct nsim_dev *nsim_dev = devlink_priv(devlink); 1080 struct nsim_trap_item *nsim_trap_item; 1081 1082 nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id); 1083 if (WARN_ON(!nsim_trap_item)) 1084 return -ENOENT; 1085 1086 nsim_trap_item->trap_ctx = trap_ctx; 1087 nsim_trap_item->action = trap->init_action; 1088 1089 return 0; 1090 } 1091 1092 static int 1093 nsim_dev_devlink_trap_action_set(struct devlink *devlink, 1094 const struct devlink_trap *trap, 1095 enum devlink_trap_action action, 1096 struct netlink_ext_ack *extack) 1097 { 1098 struct nsim_dev *nsim_dev = devlink_priv(devlink); 1099 struct nsim_trap_item *nsim_trap_item; 1100 1101 nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id); 1102 if (WARN_ON(!nsim_trap_item)) 1103 return -ENOENT; 1104 1105 spin_lock(&nsim_dev->trap_data->trap_lock); 1106 nsim_trap_item->action = action; 1107 spin_unlock(&nsim_dev->trap_data->trap_lock); 1108 1109 return 0; 1110 } 1111 1112 static int 1113 nsim_dev_devlink_trap_group_set(struct devlink *devlink, 1114 const struct devlink_trap_group *group, 1115 const struct devlink_trap_policer *policer, 1116 struct netlink_ext_ack *extack) 1117 { 1118 struct nsim_dev *nsim_dev = devlink_priv(devlink); 1119 1120 if (nsim_dev->fail_trap_group_set) 1121 return -EINVAL; 1122 1123 return 0; 1124 } 1125 1126 static int 1127 nsim_dev_devlink_trap_policer_set(struct devlink *devlink, 1128 const struct devlink_trap_policer *policer, 1129 u64 rate, u64 burst, 1130 struct netlink_ext_ack *extack) 1131 { 1132 struct nsim_dev *nsim_dev = devlink_priv(devlink); 1133 1134 if (nsim_dev->fail_trap_policer_set) { 1135 NL_SET_ERR_MSG_MOD(extack, "User setup the operation to fail for testing purposes"); 1136 return -EINVAL; 1137 } 1138 1139 return 0; 1140 } 1141 1142 static int 1143 nsim_dev_devlink_trap_policer_counter_get(struct devlink *devlink, 1144 const struct devlink_trap_policer *policer, 1145 u64 *p_drops) 1146 { 1147 struct nsim_dev *nsim_dev = devlink_priv(devlink); 1148 u64 *cnt; 1149 1150 if (nsim_dev->fail_trap_policer_counter_get) 1151 return -EINVAL; 1152 1153 cnt = &nsim_dev->trap_data->trap_policers_cnt_arr[policer->id - 1]; 1154 *p_drops = (*cnt)++; 1155 1156 return 0; 1157 } 1158 1159 #define NSIM_LINK_SPEED_MAX 5000 /* Mbps */ 1160 #define NSIM_LINK_SPEED_UNIT 125000 /* 1 Mbps given in bytes/sec to avoid 1161 * u64 overflow during conversion from 1162 * bytes to bits. 1163 */ 1164 1165 static int nsim_rate_bytes_to_units(char *name, u64 *rate, struct netlink_ext_ack *extack) 1166 { 1167 u64 val; 1168 u32 rem; 1169 1170 val = div_u64_rem(*rate, NSIM_LINK_SPEED_UNIT, &rem); 1171 if (rem) { 1172 pr_err("%s rate value %lluBps not in link speed units of 1Mbps.\n", 1173 name, *rate); 1174 NL_SET_ERR_MSG_MOD(extack, "TX rate value not in link speed units of 1Mbps."); 1175 return -EINVAL; 1176 } 1177 1178 if (val > NSIM_LINK_SPEED_MAX) { 1179 pr_err("%s rate value %lluMbps exceed link maximum speed 5000Mbps.\n", 1180 name, val); 1181 NL_SET_ERR_MSG_MOD(extack, "TX rate value exceed link maximum speed 5000Mbps."); 1182 return -EINVAL; 1183 } 1184 *rate = val; 1185 return 0; 1186 } 1187 1188 static int nsim_leaf_tc_bw_set(struct devlink_rate *devlink_rate, 1189 void *priv, u32 *tc_bw, 1190 struct netlink_ext_ack *extack) 1191 { 1192 struct nsim_dev_port *nsim_dev_port = priv; 1193 int i; 1194 1195 for (i = 0; i < DEVLINK_RATE_TCS_MAX; i++) 1196 nsim_dev_port->tc_bw[i] = tc_bw[i]; 1197 1198 return 0; 1199 } 1200 1201 static int nsim_leaf_tx_share_set(struct devlink_rate *devlink_rate, void *priv, 1202 u64 tx_share, struct netlink_ext_ack *extack) 1203 { 1204 struct nsim_dev_port *nsim_dev_port = priv; 1205 struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev; 1206 int vf_id = nsim_dev_port_index_to_vf_index(nsim_dev_port->port_index); 1207 int err; 1208 1209 err = nsim_rate_bytes_to_units("tx_share", &tx_share, extack); 1210 if (err) 1211 return err; 1212 1213 nsim_dev->vfconfigs[vf_id].min_tx_rate = tx_share; 1214 return 0; 1215 } 1216 1217 static int nsim_leaf_tx_max_set(struct devlink_rate *devlink_rate, void *priv, 1218 u64 tx_max, struct netlink_ext_ack *extack) 1219 { 1220 struct nsim_dev_port *nsim_dev_port = priv; 1221 struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev; 1222 int vf_id = nsim_dev_port_index_to_vf_index(nsim_dev_port->port_index); 1223 int err; 1224 1225 err = nsim_rate_bytes_to_units("tx_max", &tx_max, extack); 1226 if (err) 1227 return err; 1228 1229 nsim_dev->vfconfigs[vf_id].max_tx_rate = tx_max; 1230 return 0; 1231 } 1232 1233 struct nsim_rate_node { 1234 struct dentry *ddir; 1235 struct dentry *rate_parent; 1236 char *parent_name; 1237 u16 tx_share; 1238 u16 tx_max; 1239 u32 tc_bw[DEVLINK_RATE_TCS_MAX]; 1240 }; 1241 1242 static int nsim_node_tc_bw_set(struct devlink_rate *devlink_rate, void *priv, 1243 u32 *tc_bw, struct netlink_ext_ack *extack) 1244 { 1245 struct nsim_rate_node *nsim_node = priv; 1246 int i; 1247 1248 for (i = 0; i < DEVLINK_RATE_TCS_MAX; i++) 1249 nsim_node->tc_bw[i] = tc_bw[i]; 1250 1251 return 0; 1252 } 1253 1254 static int nsim_node_tx_share_set(struct devlink_rate *devlink_rate, void *priv, 1255 u64 tx_share, struct netlink_ext_ack *extack) 1256 { 1257 struct nsim_rate_node *nsim_node = priv; 1258 int err; 1259 1260 err = nsim_rate_bytes_to_units("tx_share", &tx_share, extack); 1261 if (err) 1262 return err; 1263 1264 nsim_node->tx_share = tx_share; 1265 return 0; 1266 } 1267 1268 static int nsim_node_tx_max_set(struct devlink_rate *devlink_rate, void *priv, 1269 u64 tx_max, struct netlink_ext_ack *extack) 1270 { 1271 struct nsim_rate_node *nsim_node = priv; 1272 int err; 1273 1274 err = nsim_rate_bytes_to_units("tx_max", &tx_max, extack); 1275 if (err) 1276 return err; 1277 1278 nsim_node->tx_max = tx_max; 1279 return 0; 1280 } 1281 1282 static int nsim_rate_node_new(struct devlink_rate *node, void **priv, 1283 struct netlink_ext_ack *extack) 1284 { 1285 struct nsim_dev *nsim_dev = devlink_priv(node->devlink); 1286 struct nsim_rate_node *nsim_node; 1287 1288 if (!nsim_esw_mode_is_switchdev(nsim_dev)) { 1289 NL_SET_ERR_MSG_MOD(extack, "Node creation allowed only in switchdev mode."); 1290 return -EOPNOTSUPP; 1291 } 1292 1293 nsim_node = kzalloc(sizeof(*nsim_node), GFP_KERNEL); 1294 if (!nsim_node) 1295 return -ENOMEM; 1296 1297 nsim_node->ddir = debugfs_create_dir(node->name, nsim_dev->nodes_ddir); 1298 1299 debugfs_create_u16("tx_share", 0400, nsim_node->ddir, &nsim_node->tx_share); 1300 debugfs_create_u16("tx_max", 0400, nsim_node->ddir, &nsim_node->tx_max); 1301 nsim_node->rate_parent = debugfs_create_file("rate_parent", 0400, 1302 nsim_node->ddir, 1303 &nsim_node->parent_name, 1304 &nsim_dev_rate_parent_fops); 1305 1306 nsim_dev_tc_bw_debugfs_init(nsim_node->ddir, nsim_node->tc_bw); 1307 1308 *priv = nsim_node; 1309 return 0; 1310 } 1311 1312 static int nsim_rate_node_del(struct devlink_rate *node, void *priv, 1313 struct netlink_ext_ack *extack) 1314 { 1315 struct nsim_rate_node *nsim_node = priv; 1316 1317 debugfs_remove(nsim_node->rate_parent); 1318 debugfs_remove_recursive(nsim_node->ddir); 1319 kfree(nsim_node); 1320 return 0; 1321 } 1322 1323 static int nsim_rate_leaf_parent_set(struct devlink_rate *child, 1324 struct devlink_rate *parent, 1325 void *priv_child, void *priv_parent, 1326 struct netlink_ext_ack *extack) 1327 { 1328 struct nsim_dev_port *nsim_dev_port = priv_child; 1329 1330 if (parent) 1331 nsim_dev_port->parent_name = parent->name; 1332 else 1333 nsim_dev_port->parent_name = NULL; 1334 return 0; 1335 } 1336 1337 static int nsim_rate_node_parent_set(struct devlink_rate *child, 1338 struct devlink_rate *parent, 1339 void *priv_child, void *priv_parent, 1340 struct netlink_ext_ack *extack) 1341 { 1342 struct nsim_rate_node *nsim_node = priv_child; 1343 1344 if (parent) 1345 nsim_node->parent_name = parent->name; 1346 else 1347 nsim_node->parent_name = NULL; 1348 return 0; 1349 } 1350 1351 static int 1352 nsim_dev_devlink_trap_drop_counter_get(struct devlink *devlink, 1353 const struct devlink_trap *trap, 1354 u64 *p_drops) 1355 { 1356 struct nsim_dev *nsim_dev = devlink_priv(devlink); 1357 u64 *cnt; 1358 1359 if (nsim_dev->fail_trap_drop_counter_get) 1360 return -EINVAL; 1361 1362 cnt = &nsim_dev->trap_data->trap_pkt_cnt; 1363 *p_drops = (*cnt)++; 1364 1365 return 0; 1366 } 1367 1368 static const struct devlink_ops nsim_dev_devlink_ops = { 1369 .eswitch_mode_set = nsim_devlink_eswitch_mode_set, 1370 .eswitch_mode_get = nsim_devlink_eswitch_mode_get, 1371 .supported_flash_update_params = DEVLINK_SUPPORT_FLASH_UPDATE_OVERWRITE_MASK, 1372 .reload_actions = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT), 1373 .reload_down = nsim_dev_reload_down, 1374 .reload_up = nsim_dev_reload_up, 1375 .info_get = nsim_dev_info_get, 1376 .flash_update = nsim_dev_flash_update, 1377 .trap_init = nsim_dev_devlink_trap_init, 1378 .trap_action_set = nsim_dev_devlink_trap_action_set, 1379 .trap_group_set = nsim_dev_devlink_trap_group_set, 1380 .trap_policer_set = nsim_dev_devlink_trap_policer_set, 1381 .trap_policer_counter_get = nsim_dev_devlink_trap_policer_counter_get, 1382 .rate_leaf_tx_share_set = nsim_leaf_tx_share_set, 1383 .rate_leaf_tx_max_set = nsim_leaf_tx_max_set, 1384 .rate_leaf_tc_bw_set = nsim_leaf_tc_bw_set, 1385 .rate_node_tx_share_set = nsim_node_tx_share_set, 1386 .rate_node_tx_max_set = nsim_node_tx_max_set, 1387 .rate_node_tc_bw_set = nsim_node_tc_bw_set, 1388 .rate_node_new = nsim_rate_node_new, 1389 .rate_node_del = nsim_rate_node_del, 1390 .rate_leaf_parent_set = nsim_rate_leaf_parent_set, 1391 .rate_node_parent_set = nsim_rate_node_parent_set, 1392 .trap_drop_counter_get = nsim_dev_devlink_trap_drop_counter_get, 1393 }; 1394 1395 #define NSIM_DEV_MAX_MACS_DEFAULT 32 1396 #define NSIM_DEV_TEST1_DEFAULT true 1397 1398 static int __nsim_dev_port_add(struct nsim_dev *nsim_dev, enum nsim_dev_port_type type, 1399 unsigned int port_index) 1400 { 1401 struct devlink_port_attrs attrs = {}; 1402 struct nsim_dev_port *nsim_dev_port; 1403 struct devlink_port *devlink_port; 1404 int err; 1405 1406 if (type == NSIM_DEV_PORT_TYPE_VF && !nsim_dev_get_vfs(nsim_dev)) 1407 return -EINVAL; 1408 1409 nsim_dev_port = kzalloc(sizeof(*nsim_dev_port), GFP_KERNEL); 1410 if (!nsim_dev_port) 1411 return -ENOMEM; 1412 nsim_dev_port->port_index = nsim_dev_port_index(type, port_index); 1413 nsim_dev_port->port_type = type; 1414 1415 devlink_port = &nsim_dev_port->devlink_port; 1416 if (nsim_dev_port_is_pf(nsim_dev_port)) { 1417 attrs.flavour = DEVLINK_PORT_FLAVOUR_PHYSICAL; 1418 attrs.phys.port_number = port_index + 1; 1419 } else { 1420 attrs.flavour = DEVLINK_PORT_FLAVOUR_PCI_VF; 1421 attrs.pci_vf.pf = 0; 1422 attrs.pci_vf.vf = port_index; 1423 } 1424 memcpy(attrs.switch_id.id, nsim_dev->switch_id.id, nsim_dev->switch_id.id_len); 1425 attrs.switch_id.id_len = nsim_dev->switch_id.id_len; 1426 devlink_port_attrs_set(devlink_port, &attrs); 1427 err = devl_port_register(priv_to_devlink(nsim_dev), devlink_port, 1428 nsim_dev_port->port_index); 1429 if (err) 1430 goto err_port_free; 1431 1432 err = nsim_dev_port_debugfs_init(nsim_dev, nsim_dev_port); 1433 if (err) 1434 goto err_dl_port_unregister; 1435 1436 nsim_dev_port->ns = nsim_create(nsim_dev, nsim_dev_port); 1437 if (IS_ERR(nsim_dev_port->ns)) { 1438 err = PTR_ERR(nsim_dev_port->ns); 1439 goto err_port_debugfs_exit; 1440 } 1441 1442 if (nsim_dev_port_is_vf(nsim_dev_port)) { 1443 err = devl_rate_leaf_create(&nsim_dev_port->devlink_port, 1444 nsim_dev_port, NULL); 1445 if (err) 1446 goto err_nsim_destroy; 1447 } 1448 1449 list_add(&nsim_dev_port->list, &nsim_dev->port_list); 1450 1451 return 0; 1452 1453 err_nsim_destroy: 1454 nsim_destroy(nsim_dev_port->ns); 1455 err_port_debugfs_exit: 1456 nsim_dev_port_debugfs_exit(nsim_dev_port); 1457 err_dl_port_unregister: 1458 devl_port_unregister(devlink_port); 1459 err_port_free: 1460 kfree(nsim_dev_port); 1461 return err; 1462 } 1463 1464 static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port) 1465 { 1466 struct devlink_port *devlink_port = &nsim_dev_port->devlink_port; 1467 1468 list_del(&nsim_dev_port->list); 1469 if (nsim_dev_port_is_vf(nsim_dev_port)) 1470 devl_rate_leaf_destroy(&nsim_dev_port->devlink_port); 1471 nsim_destroy(nsim_dev_port->ns); 1472 nsim_dev_port_debugfs_exit(nsim_dev_port); 1473 devl_port_unregister(devlink_port); 1474 kfree(nsim_dev_port); 1475 } 1476 1477 static void nsim_dev_port_del_all(struct nsim_dev *nsim_dev) 1478 { 1479 struct nsim_dev_port *nsim_dev_port, *tmp; 1480 1481 list_for_each_entry_safe(nsim_dev_port, tmp, 1482 &nsim_dev->port_list, list) 1483 __nsim_dev_port_del(nsim_dev_port); 1484 } 1485 1486 static int nsim_dev_port_add_all(struct nsim_dev *nsim_dev, 1487 unsigned int port_count) 1488 { 1489 int i, err; 1490 1491 for (i = 0; i < port_count; i++) { 1492 err = __nsim_dev_port_add(nsim_dev, NSIM_DEV_PORT_TYPE_PF, i); 1493 if (err) 1494 goto err_port_del_all; 1495 } 1496 return 0; 1497 1498 err_port_del_all: 1499 nsim_dev_port_del_all(nsim_dev); 1500 return err; 1501 } 1502 1503 static int nsim_dev_reload_create(struct nsim_dev *nsim_dev, 1504 struct netlink_ext_ack *extack) 1505 { 1506 struct nsim_bus_dev *nsim_bus_dev = nsim_dev->nsim_bus_dev; 1507 struct devlink *devlink; 1508 int err; 1509 1510 devlink = priv_to_devlink(nsim_dev); 1511 nsim_dev = devlink_priv(devlink); 1512 INIT_LIST_HEAD(&nsim_dev->port_list); 1513 nsim_dev->fw_update_status = true; 1514 nsim_dev->fw_update_overwrite_mask = 0; 1515 1516 nsim_devlink_param_load_driverinit_values(devlink); 1517 1518 err = nsim_dev_dummy_region_init(nsim_dev, devlink); 1519 if (err) 1520 return err; 1521 1522 err = nsim_dev_traps_init(devlink); 1523 if (err) 1524 goto err_dummy_region_exit; 1525 1526 nsim_dev->fib_data = nsim_fib_create(devlink, extack); 1527 if (IS_ERR(nsim_dev->fib_data)) { 1528 err = PTR_ERR(nsim_dev->fib_data); 1529 goto err_traps_exit; 1530 } 1531 1532 err = nsim_dev_health_init(nsim_dev, devlink); 1533 if (err) 1534 goto err_fib_destroy; 1535 1536 err = nsim_dev_psample_init(nsim_dev); 1537 if (err) 1538 goto err_health_exit; 1539 1540 err = nsim_dev_hwstats_init(nsim_dev); 1541 if (err) 1542 goto err_psample_exit; 1543 1544 err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count); 1545 if (err) 1546 goto err_hwstats_exit; 1547 1548 nsim_dev->take_snapshot = debugfs_create_file("take_snapshot", 1549 0200, 1550 nsim_dev->ddir, 1551 nsim_dev, 1552 &nsim_dev_take_snapshot_fops); 1553 return 0; 1554 1555 err_hwstats_exit: 1556 nsim_dev_hwstats_exit(nsim_dev); 1557 err_psample_exit: 1558 nsim_dev_psample_exit(nsim_dev); 1559 err_health_exit: 1560 nsim_dev_health_exit(nsim_dev); 1561 err_fib_destroy: 1562 nsim_fib_destroy(devlink, nsim_dev->fib_data); 1563 err_traps_exit: 1564 nsim_dev_traps_exit(devlink); 1565 err_dummy_region_exit: 1566 nsim_dev_dummy_region_exit(nsim_dev); 1567 return err; 1568 } 1569 1570 int nsim_drv_probe(struct nsim_bus_dev *nsim_bus_dev) 1571 { 1572 struct nsim_dev *nsim_dev; 1573 struct devlink *devlink; 1574 int err; 1575 1576 devlink = devlink_alloc_ns(&nsim_dev_devlink_ops, sizeof(*nsim_dev), 1577 nsim_bus_dev->initial_net, &nsim_bus_dev->dev); 1578 if (!devlink) 1579 return -ENOMEM; 1580 devl_lock(devlink); 1581 nsim_dev = devlink_priv(devlink); 1582 nsim_dev->nsim_bus_dev = nsim_bus_dev; 1583 nsim_dev->switch_id.id_len = sizeof(nsim_dev->switch_id.id); 1584 get_random_bytes(nsim_dev->switch_id.id, nsim_dev->switch_id.id_len); 1585 INIT_LIST_HEAD(&nsim_dev->port_list); 1586 nsim_dev->fw_update_status = true; 1587 nsim_dev->fw_update_overwrite_mask = 0; 1588 nsim_dev->max_macs = NSIM_DEV_MAX_MACS_DEFAULT; 1589 nsim_dev->test1 = NSIM_DEV_TEST1_DEFAULT; 1590 spin_lock_init(&nsim_dev->fa_cookie_lock); 1591 1592 dev_set_drvdata(&nsim_bus_dev->dev, nsim_dev); 1593 1594 nsim_dev->vfconfigs = kcalloc(nsim_bus_dev->max_vfs, 1595 sizeof(struct nsim_vf_config), 1596 GFP_KERNEL | __GFP_NOWARN); 1597 if (!nsim_dev->vfconfigs) { 1598 err = -ENOMEM; 1599 goto err_devlink_unlock; 1600 } 1601 1602 err = devl_register(devlink); 1603 if (err) 1604 goto err_vfc_free; 1605 1606 err = nsim_dev_resources_register(devlink); 1607 if (err) 1608 goto err_dl_unregister; 1609 1610 err = devl_params_register(devlink, nsim_devlink_params, 1611 ARRAY_SIZE(nsim_devlink_params)); 1612 if (err) 1613 goto err_resource_unregister; 1614 nsim_devlink_set_params_init_values(nsim_dev, devlink); 1615 1616 err = nsim_dev_dummy_region_init(nsim_dev, devlink); 1617 if (err) 1618 goto err_params_unregister; 1619 1620 err = nsim_dev_traps_init(devlink); 1621 if (err) 1622 goto err_dummy_region_exit; 1623 1624 err = nsim_dev_debugfs_init(nsim_dev); 1625 if (err) 1626 goto err_traps_exit; 1627 1628 nsim_dev->fib_data = nsim_fib_create(devlink, NULL); 1629 if (IS_ERR(nsim_dev->fib_data)) { 1630 err = PTR_ERR(nsim_dev->fib_data); 1631 goto err_debugfs_exit; 1632 } 1633 1634 err = nsim_dev_health_init(nsim_dev, devlink); 1635 if (err) 1636 goto err_fib_destroy; 1637 1638 err = nsim_bpf_dev_init(nsim_dev); 1639 if (err) 1640 goto err_health_exit; 1641 1642 err = nsim_dev_psample_init(nsim_dev); 1643 if (err) 1644 goto err_bpf_dev_exit; 1645 1646 err = nsim_dev_hwstats_init(nsim_dev); 1647 if (err) 1648 goto err_psample_exit; 1649 1650 err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count); 1651 if (err) 1652 goto err_hwstats_exit; 1653 1654 nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_LEGACY; 1655 devl_unlock(devlink); 1656 return 0; 1657 1658 err_hwstats_exit: 1659 nsim_dev_hwstats_exit(nsim_dev); 1660 err_psample_exit: 1661 nsim_dev_psample_exit(nsim_dev); 1662 err_bpf_dev_exit: 1663 nsim_bpf_dev_exit(nsim_dev); 1664 err_health_exit: 1665 nsim_dev_health_exit(nsim_dev); 1666 err_fib_destroy: 1667 nsim_fib_destroy(devlink, nsim_dev->fib_data); 1668 err_debugfs_exit: 1669 nsim_dev_debugfs_exit(nsim_dev); 1670 err_traps_exit: 1671 nsim_dev_traps_exit(devlink); 1672 err_dummy_region_exit: 1673 nsim_dev_dummy_region_exit(nsim_dev); 1674 err_params_unregister: 1675 devl_params_unregister(devlink, nsim_devlink_params, 1676 ARRAY_SIZE(nsim_devlink_params)); 1677 err_resource_unregister: 1678 devl_resources_unregister(devlink); 1679 err_dl_unregister: 1680 devl_unregister(devlink); 1681 err_vfc_free: 1682 kfree(nsim_dev->vfconfigs); 1683 err_devlink_unlock: 1684 devl_unlock(devlink); 1685 devlink_free(devlink); 1686 dev_set_drvdata(&nsim_bus_dev->dev, NULL); 1687 return err; 1688 } 1689 1690 static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev) 1691 { 1692 struct devlink *devlink = priv_to_devlink(nsim_dev); 1693 1694 if (devlink_is_reload_failed(devlink)) 1695 return; 1696 debugfs_remove(nsim_dev->take_snapshot); 1697 1698 if (nsim_dev_get_vfs(nsim_dev)) { 1699 nsim_bus_dev_set_vfs(nsim_dev->nsim_bus_dev, 0); 1700 if (nsim_esw_mode_is_switchdev(nsim_dev)) 1701 nsim_esw_legacy_enable(nsim_dev, NULL); 1702 } 1703 1704 nsim_dev_port_del_all(nsim_dev); 1705 nsim_dev_hwstats_exit(nsim_dev); 1706 nsim_dev_psample_exit(nsim_dev); 1707 nsim_dev_health_exit(nsim_dev); 1708 nsim_fib_destroy(devlink, nsim_dev->fib_data); 1709 nsim_dev_traps_exit(devlink); 1710 nsim_dev_dummy_region_exit(nsim_dev); 1711 } 1712 1713 void nsim_drv_remove(struct nsim_bus_dev *nsim_bus_dev) 1714 { 1715 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); 1716 struct devlink *devlink = priv_to_devlink(nsim_dev); 1717 1718 devl_lock(devlink); 1719 nsim_dev_reload_destroy(nsim_dev); 1720 1721 nsim_bpf_dev_exit(nsim_dev); 1722 nsim_dev_debugfs_exit(nsim_dev); 1723 devl_params_unregister(devlink, nsim_devlink_params, 1724 ARRAY_SIZE(nsim_devlink_params)); 1725 devl_resources_unregister(devlink); 1726 devl_unregister(devlink); 1727 kfree(nsim_dev->vfconfigs); 1728 kfree(nsim_dev->fa_cookie); 1729 devl_unlock(devlink); 1730 devlink_free(devlink); 1731 dev_set_drvdata(&nsim_bus_dev->dev, NULL); 1732 } 1733 1734 static struct nsim_dev_port * 1735 __nsim_dev_port_lookup(struct nsim_dev *nsim_dev, enum nsim_dev_port_type type, 1736 unsigned int port_index) 1737 { 1738 struct nsim_dev_port *nsim_dev_port; 1739 1740 port_index = nsim_dev_port_index(type, port_index); 1741 list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list) 1742 if (nsim_dev_port->port_index == port_index) 1743 return nsim_dev_port; 1744 return NULL; 1745 } 1746 1747 int nsim_drv_port_add(struct nsim_bus_dev *nsim_bus_dev, enum nsim_dev_port_type type, 1748 unsigned int port_index) 1749 { 1750 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); 1751 int err; 1752 1753 devl_lock(priv_to_devlink(nsim_dev)); 1754 if (__nsim_dev_port_lookup(nsim_dev, type, port_index)) 1755 err = -EEXIST; 1756 else 1757 err = __nsim_dev_port_add(nsim_dev, type, port_index); 1758 devl_unlock(priv_to_devlink(nsim_dev)); 1759 return err; 1760 } 1761 1762 int nsim_drv_port_del(struct nsim_bus_dev *nsim_bus_dev, enum nsim_dev_port_type type, 1763 unsigned int port_index) 1764 { 1765 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); 1766 struct nsim_dev_port *nsim_dev_port; 1767 int err = 0; 1768 1769 devl_lock(priv_to_devlink(nsim_dev)); 1770 nsim_dev_port = __nsim_dev_port_lookup(nsim_dev, type, port_index); 1771 if (!nsim_dev_port) 1772 err = -ENOENT; 1773 else 1774 __nsim_dev_port_del(nsim_dev_port); 1775 devl_unlock(priv_to_devlink(nsim_dev)); 1776 return err; 1777 } 1778 1779 int nsim_drv_configure_vfs(struct nsim_bus_dev *nsim_bus_dev, 1780 unsigned int num_vfs) 1781 { 1782 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); 1783 struct devlink *devlink = priv_to_devlink(nsim_dev); 1784 int ret = 0; 1785 1786 devl_lock(devlink); 1787 if (nsim_bus_dev->num_vfs == num_vfs) 1788 goto exit_unlock; 1789 if (nsim_bus_dev->num_vfs && num_vfs) { 1790 ret = -EBUSY; 1791 goto exit_unlock; 1792 } 1793 if (nsim_bus_dev->max_vfs < num_vfs) { 1794 ret = -ENOMEM; 1795 goto exit_unlock; 1796 } 1797 1798 nsim_bus_dev_set_vfs(nsim_bus_dev, num_vfs); 1799 if (nsim_esw_mode_is_switchdev(nsim_dev)) { 1800 if (num_vfs) { 1801 ret = nsim_esw_switchdev_enable(nsim_dev, NULL); 1802 if (ret) { 1803 nsim_bus_dev_set_vfs(nsim_bus_dev, 0); 1804 goto exit_unlock; 1805 } 1806 } else { 1807 nsim_esw_legacy_enable(nsim_dev, NULL); 1808 } 1809 } 1810 1811 exit_unlock: 1812 devl_unlock(devlink); 1813 1814 return ret; 1815 } 1816 1817 int nsim_dev_init(void) 1818 { 1819 nsim_dev_ddir = debugfs_create_dir(DRV_NAME, NULL); 1820 return PTR_ERR_OR_ZERO(nsim_dev_ddir); 1821 } 1822 1823 void nsim_dev_exit(void) 1824 { 1825 debugfs_remove_recursive(nsim_dev_ddir); 1826 } 1827