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/hex.h> 22 #include <linux/inet.h> 23 #include <linux/jiffies.h> 24 #include <linux/kernel.h> 25 #include <linux/list.h> 26 #include <linux/mutex.h> 27 #include <linux/random.h> 28 #include <linux/rtnetlink.h> 29 #include <linux/workqueue.h> 30 #include <net/devlink.h> 31 #include <net/ip.h> 32 #include <net/flow_offload.h> 33 #include <uapi/linux/devlink.h> 34 #include <uapi/linux/ip.h> 35 #include <uapi/linux/udp.h> 36 37 #include "netdevsim.h" 38 39 static unsigned int 40 nsim_dev_port_index(enum nsim_dev_port_type type, unsigned int port_index) 41 { 42 switch (type) { 43 case NSIM_DEV_PORT_TYPE_VF: 44 port_index = NSIM_DEV_VF_PORT_INDEX_BASE + port_index; 45 break; 46 case NSIM_DEV_PORT_TYPE_PF: 47 break; 48 } 49 50 return port_index; 51 } 52 53 static inline unsigned int nsim_dev_port_index_to_vf_index(unsigned int port_index) 54 { 55 return port_index - NSIM_DEV_VF_PORT_INDEX_BASE; 56 } 57 58 static struct dentry *nsim_dev_ddir; 59 60 unsigned int nsim_dev_get_vfs(struct nsim_dev *nsim_dev) 61 { 62 WARN_ON(!lockdep_rtnl_is_held() && 63 !devl_lock_is_held(priv_to_devlink(nsim_dev))); 64 65 return nsim_dev->nsim_bus_dev->num_vfs; 66 } 67 68 static void 69 nsim_bus_dev_set_vfs(struct nsim_bus_dev *nsim_bus_dev, unsigned int num_vfs) 70 { 71 rtnl_lock(); 72 nsim_bus_dev->num_vfs = num_vfs; 73 rtnl_unlock(); 74 } 75 76 #define NSIM_DEV_DUMMY_REGION_SIZE (1024 * 32) 77 78 static int 79 nsim_dev_take_snapshot(struct devlink *devlink, 80 const struct devlink_region_ops *ops, 81 struct netlink_ext_ack *extack, 82 u8 **data) 83 { 84 void *dummy_data; 85 86 dummy_data = kmalloc(NSIM_DEV_DUMMY_REGION_SIZE, GFP_KERNEL); 87 if (!dummy_data) 88 return -ENOMEM; 89 90 get_random_bytes(dummy_data, NSIM_DEV_DUMMY_REGION_SIZE); 91 92 *data = dummy_data; 93 94 return 0; 95 } 96 97 static ssize_t nsim_dev_take_snapshot_write(struct file *file, 98 const char __user *data, 99 size_t count, loff_t *ppos) 100 { 101 struct nsim_dev *nsim_dev = file->private_data; 102 struct devlink *devlink; 103 u8 *dummy_data; 104 int err; 105 u32 id; 106 107 devlink = priv_to_devlink(nsim_dev); 108 109 err = nsim_dev_take_snapshot(devlink, NULL, NULL, &dummy_data); 110 if (err) 111 return err; 112 113 err = devlink_region_snapshot_id_get(devlink, &id); 114 if (err) { 115 pr_err("Failed to get snapshot id\n"); 116 kfree(dummy_data); 117 return err; 118 } 119 err = devlink_region_snapshot_create(nsim_dev->dummy_region, 120 dummy_data, id); 121 devlink_region_snapshot_id_put(devlink, id); 122 if (err) { 123 pr_err("Failed to create region snapshot\n"); 124 kfree(dummy_data); 125 return err; 126 } 127 128 return count; 129 } 130 131 static const struct file_operations nsim_dev_take_snapshot_fops = { 132 .open = simple_open, 133 .write = nsim_dev_take_snapshot_write, 134 .llseek = generic_file_llseek, 135 .owner = THIS_MODULE, 136 }; 137 138 static ssize_t nsim_dev_trap_fa_cookie_read(struct file *file, 139 char __user *data, 140 size_t count, loff_t *ppos) 141 { 142 struct nsim_dev *nsim_dev = file->private_data; 143 struct flow_action_cookie *fa_cookie; 144 unsigned int buf_len; 145 ssize_t ret; 146 char *buf; 147 148 spin_lock(&nsim_dev->fa_cookie_lock); 149 fa_cookie = nsim_dev->fa_cookie; 150 if (!fa_cookie) { 151 ret = -EINVAL; 152 goto errout; 153 } 154 buf_len = fa_cookie->cookie_len * 2; 155 buf = kmalloc(buf_len, GFP_ATOMIC); 156 if (!buf) { 157 ret = -ENOMEM; 158 goto errout; 159 } 160 bin2hex(buf, fa_cookie->cookie, fa_cookie->cookie_len); 161 spin_unlock(&nsim_dev->fa_cookie_lock); 162 163 ret = simple_read_from_buffer(data, count, ppos, buf, buf_len); 164 165 kfree(buf); 166 return ret; 167 168 errout: 169 spin_unlock(&nsim_dev->fa_cookie_lock); 170 return ret; 171 } 172 173 static ssize_t nsim_dev_trap_fa_cookie_write(struct file *file, 174 const char __user *data, 175 size_t count, loff_t *ppos) 176 { 177 struct nsim_dev *nsim_dev = file->private_data; 178 struct flow_action_cookie *fa_cookie; 179 size_t cookie_len; 180 ssize_t ret; 181 char *buf; 182 183 if (*ppos != 0) 184 return -EINVAL; 185 cookie_len = (count - 1) / 2; 186 if ((count - 1) % 2) 187 return -EINVAL; 188 189 buf = memdup_user(data, count); 190 if (IS_ERR(buf)) 191 return PTR_ERR(buf); 192 193 fa_cookie = kmalloc(sizeof(*fa_cookie) + cookie_len, 194 GFP_KERNEL | __GFP_NOWARN); 195 if (!fa_cookie) { 196 ret = -ENOMEM; 197 goto free_buf; 198 } 199 200 fa_cookie->cookie_len = cookie_len; 201 ret = hex2bin(fa_cookie->cookie, buf, cookie_len); 202 if (ret) 203 goto free_fa_cookie; 204 kfree(buf); 205 206 spin_lock(&nsim_dev->fa_cookie_lock); 207 kfree(nsim_dev->fa_cookie); 208 nsim_dev->fa_cookie = fa_cookie; 209 spin_unlock(&nsim_dev->fa_cookie_lock); 210 211 return count; 212 213 free_fa_cookie: 214 kfree(fa_cookie); 215 free_buf: 216 kfree(buf); 217 return ret; 218 } 219 220 static const struct file_operations nsim_dev_trap_fa_cookie_fops = { 221 .open = simple_open, 222 .read = nsim_dev_trap_fa_cookie_read, 223 .write = nsim_dev_trap_fa_cookie_write, 224 .llseek = generic_file_llseek, 225 .owner = THIS_MODULE, 226 }; 227 228 static ssize_t nsim_bus_dev_max_vfs_read(struct file *file, char __user *data, 229 size_t count, loff_t *ppos) 230 { 231 struct nsim_dev *nsim_dev = file->private_data; 232 char buf[11]; 233 ssize_t len; 234 235 len = scnprintf(buf, sizeof(buf), "%u\n", 236 READ_ONCE(nsim_dev->nsim_bus_dev->max_vfs)); 237 238 return simple_read_from_buffer(data, count, ppos, buf, len); 239 } 240 241 static ssize_t nsim_bus_dev_max_vfs_write(struct file *file, 242 const char __user *data, 243 size_t count, loff_t *ppos) 244 { 245 struct nsim_vf_config *vfconfigs; 246 struct nsim_dev *nsim_dev; 247 char buf[10]; 248 ssize_t ret; 249 u32 val; 250 251 if (*ppos != 0) 252 return 0; 253 254 if (count >= sizeof(buf)) 255 return -ENOSPC; 256 257 ret = copy_from_user(buf, data, count); 258 if (ret) 259 return -EFAULT; 260 buf[count] = '\0'; 261 262 ret = kstrtouint(buf, 10, &val); 263 if (ret) 264 return -EINVAL; 265 266 /* max_vfs limited by the maximum number of provided port indexes */ 267 if (val > NSIM_DEV_VF_PORT_INDEX_MAX - NSIM_DEV_VF_PORT_INDEX_BASE) 268 return -ERANGE; 269 270 vfconfigs = kcalloc(val, sizeof(struct nsim_vf_config), 271 GFP_KERNEL | __GFP_NOWARN); 272 if (!vfconfigs) 273 return -ENOMEM; 274 275 nsim_dev = file->private_data; 276 devl_lock(priv_to_devlink(nsim_dev)); 277 /* Reject if VFs are configured */ 278 if (nsim_dev_get_vfs(nsim_dev)) { 279 ret = -EBUSY; 280 } else { 281 swap(nsim_dev->vfconfigs, vfconfigs); 282 WRITE_ONCE(nsim_dev->nsim_bus_dev->max_vfs, val); 283 *ppos += count; 284 ret = count; 285 } 286 devl_unlock(priv_to_devlink(nsim_dev)); 287 288 kfree(vfconfigs); 289 return ret; 290 } 291 292 static const struct file_operations nsim_dev_max_vfs_fops = { 293 .open = simple_open, 294 .read = nsim_bus_dev_max_vfs_read, 295 .write = nsim_bus_dev_max_vfs_write, 296 .llseek = generic_file_llseek, 297 .owner = THIS_MODULE, 298 }; 299 300 static int nsim_dev_debugfs_init(struct nsim_dev *nsim_dev) 301 { 302 char dev_ddir_name[sizeof(DRV_NAME) + 10]; 303 int err; 304 305 sprintf(dev_ddir_name, DRV_NAME "%u", nsim_dev->nsim_bus_dev->dev.id); 306 nsim_dev->ddir = debugfs_create_dir(dev_ddir_name, nsim_dev_ddir); 307 if (IS_ERR(nsim_dev->ddir)) 308 return PTR_ERR(nsim_dev->ddir); 309 nsim_dev->ports_ddir = debugfs_create_dir("ports", nsim_dev->ddir); 310 if (IS_ERR(nsim_dev->ports_ddir)) { 311 err = PTR_ERR(nsim_dev->ports_ddir); 312 goto err_ddir; 313 } 314 debugfs_create_bool("fw_update_status", 0600, nsim_dev->ddir, 315 &nsim_dev->fw_update_status); 316 debugfs_create_u32("fw_update_overwrite_mask", 0600, nsim_dev->ddir, 317 &nsim_dev->fw_update_overwrite_mask); 318 debugfs_create_u32("fw_update_flash_chunk_time_ms", 0600, nsim_dev->ddir, 319 &nsim_dev->fw_update_flash_chunk_time_ms); 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 debugfs_create_u32("test2", 0600, nsim_dev->ddir, 325 &nsim_dev->test2); 326 nsim_dev->take_snapshot = debugfs_create_file("take_snapshot", 327 0200, 328 nsim_dev->ddir, 329 nsim_dev, 330 &nsim_dev_take_snapshot_fops); 331 debugfs_create_bool("dont_allow_reload", 0600, nsim_dev->ddir, 332 &nsim_dev->dont_allow_reload); 333 debugfs_create_bool("fail_reload", 0600, nsim_dev->ddir, 334 &nsim_dev->fail_reload); 335 debugfs_create_file("trap_flow_action_cookie", 0600, nsim_dev->ddir, 336 nsim_dev, &nsim_dev_trap_fa_cookie_fops); 337 debugfs_create_bool("fail_trap_group_set", 0600, 338 nsim_dev->ddir, 339 &nsim_dev->fail_trap_group_set); 340 debugfs_create_bool("fail_trap_policer_set", 0600, 341 nsim_dev->ddir, 342 &nsim_dev->fail_trap_policer_set); 343 debugfs_create_bool("fail_trap_policer_counter_get", 0600, 344 nsim_dev->ddir, 345 &nsim_dev->fail_trap_policer_counter_get); 346 /* caution, dev_max_vfs write takes devlink lock */ 347 debugfs_create_file("max_vfs", 0600, nsim_dev->ddir, 348 nsim_dev, &nsim_dev_max_vfs_fops); 349 350 nsim_dev->nodes_ddir = debugfs_create_dir("rate_nodes", nsim_dev->ddir); 351 if (IS_ERR(nsim_dev->nodes_ddir)) { 352 err = PTR_ERR(nsim_dev->nodes_ddir); 353 goto err_ports_ddir; 354 } 355 debugfs_create_bool("fail_trap_drop_counter_get", 0600, 356 nsim_dev->ddir, 357 &nsim_dev->fail_trap_drop_counter_get); 358 nsim_udp_tunnels_debugfs_create(nsim_dev); 359 return 0; 360 361 err_ports_ddir: 362 debugfs_remove_recursive(nsim_dev->ports_ddir); 363 err_ddir: 364 debugfs_remove_recursive(nsim_dev->ddir); 365 return err; 366 } 367 368 static void nsim_dev_debugfs_exit(struct nsim_dev *nsim_dev) 369 { 370 debugfs_remove_recursive(nsim_dev->nodes_ddir); 371 debugfs_remove_recursive(nsim_dev->ports_ddir); 372 debugfs_remove_recursive(nsim_dev->ddir); 373 } 374 375 static ssize_t nsim_dev_rate_parent_read(struct file *file, 376 char __user *data, 377 size_t count, loff_t *ppos) 378 { 379 char **name_ptr = file->private_data; 380 size_t len; 381 382 if (!*name_ptr) 383 return 0; 384 385 len = strlen(*name_ptr); 386 return simple_read_from_buffer(data, count, ppos, *name_ptr, len); 387 } 388 389 static const struct file_operations nsim_dev_rate_parent_fops = { 390 .open = simple_open, 391 .read = nsim_dev_rate_parent_read, 392 .llseek = generic_file_llseek, 393 .owner = THIS_MODULE, 394 }; 395 396 static void nsim_dev_tc_bw_debugfs_init(struct dentry *ddir, u32 *tc_bw) 397 { 398 int i; 399 400 for (i = 0; i < DEVLINK_RATE_TCS_MAX; i++) { 401 char name[16]; 402 403 snprintf(name, sizeof(name), "tc%d_bw", i); 404 debugfs_create_u32(name, 0400, ddir, &tc_bw[i]); 405 } 406 } 407 static int nsim_dev_port_debugfs_init(struct nsim_dev *nsim_dev, 408 struct nsim_dev_port *nsim_dev_port) 409 { 410 struct nsim_bus_dev *nsim_bus_dev = nsim_dev->nsim_bus_dev; 411 unsigned int port_index = nsim_dev_port->port_index; 412 char port_ddir_name[16]; 413 char dev_link_name[32]; 414 415 sprintf(port_ddir_name, "%u", port_index); 416 nsim_dev_port->ddir = debugfs_create_dir(port_ddir_name, 417 nsim_dev->ports_ddir); 418 if (IS_ERR(nsim_dev_port->ddir)) 419 return PTR_ERR(nsim_dev_port->ddir); 420 421 sprintf(dev_link_name, "../../../" DRV_NAME "%u", nsim_bus_dev->dev.id); 422 if (nsim_dev_port_is_vf(nsim_dev_port)) { 423 unsigned int vf_id = nsim_dev_port_index_to_vf_index(port_index); 424 425 debugfs_create_u16("tx_share", 0400, nsim_dev_port->ddir, 426 &nsim_dev->vfconfigs[vf_id].min_tx_rate); 427 debugfs_create_u16("tx_max", 0400, nsim_dev_port->ddir, 428 &nsim_dev->vfconfigs[vf_id].max_tx_rate); 429 nsim_dev_port->rate_parent = debugfs_create_file("rate_parent", 430 0400, 431 nsim_dev_port->ddir, 432 &nsim_dev_port->parent_name, 433 &nsim_dev_rate_parent_fops); 434 nsim_dev_tc_bw_debugfs_init(nsim_dev_port->ddir, 435 nsim_dev_port->tc_bw); 436 } 437 debugfs_create_symlink("dev", nsim_dev_port->ddir, dev_link_name); 438 439 return 0; 440 } 441 442 static void nsim_dev_port_debugfs_exit(struct nsim_dev_port *nsim_dev_port) 443 { 444 debugfs_remove_recursive(nsim_dev_port->ddir); 445 } 446 447 static int nsim_dev_resources_register(struct devlink *devlink) 448 { 449 struct devlink_resource_size_params params = { 450 .size_max = (u64)-1, 451 .size_granularity = 1, 452 .unit = DEVLINK_RESOURCE_UNIT_ENTRY 453 }; 454 int err; 455 456 /* Resources for IPv4 */ 457 err = devl_resource_register(devlink, "IPv4", (u64)-1, 458 NSIM_RESOURCE_IPV4, 459 DEVLINK_RESOURCE_ID_PARENT_TOP, 460 ¶ms); 461 if (err) { 462 pr_err("Failed to register IPv4 top resource\n"); 463 goto err_out; 464 } 465 466 err = devl_resource_register(devlink, "fib", (u64)-1, 467 NSIM_RESOURCE_IPV4_FIB, 468 NSIM_RESOURCE_IPV4, ¶ms); 469 if (err) { 470 pr_err("Failed to register IPv4 FIB resource\n"); 471 goto err_out; 472 } 473 474 err = devl_resource_register(devlink, "fib-rules", (u64)-1, 475 NSIM_RESOURCE_IPV4_FIB_RULES, 476 NSIM_RESOURCE_IPV4, ¶ms); 477 if (err) { 478 pr_err("Failed to register IPv4 FIB rules resource\n"); 479 goto err_out; 480 } 481 482 /* Resources for IPv6 */ 483 err = devl_resource_register(devlink, "IPv6", (u64)-1, 484 NSIM_RESOURCE_IPV6, 485 DEVLINK_RESOURCE_ID_PARENT_TOP, 486 ¶ms); 487 if (err) { 488 pr_err("Failed to register IPv6 top resource\n"); 489 goto err_out; 490 } 491 492 err = devl_resource_register(devlink, "fib", (u64)-1, 493 NSIM_RESOURCE_IPV6_FIB, 494 NSIM_RESOURCE_IPV6, ¶ms); 495 if (err) { 496 pr_err("Failed to register IPv6 FIB resource\n"); 497 goto err_out; 498 } 499 500 err = devl_resource_register(devlink, "fib-rules", (u64)-1, 501 NSIM_RESOURCE_IPV6_FIB_RULES, 502 NSIM_RESOURCE_IPV6, ¶ms); 503 if (err) { 504 pr_err("Failed to register IPv6 FIB rules resource\n"); 505 goto err_out; 506 } 507 508 /* Resources for nexthops */ 509 err = devl_resource_register(devlink, "nexthops", (u64)-1, 510 NSIM_RESOURCE_NEXTHOPS, 511 DEVLINK_RESOURCE_ID_PARENT_TOP, 512 ¶ms); 513 if (err) { 514 pr_err("Failed to register NEXTHOPS resource\n"); 515 goto err_out; 516 } 517 return 0; 518 519 err_out: 520 devl_resources_unregister(devlink); 521 return err; 522 } 523 524 enum nsim_devlink_param_id { 525 NSIM_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX, 526 NSIM_DEVLINK_PARAM_ID_TEST1, 527 NSIM_DEVLINK_PARAM_ID_TEST2, 528 }; 529 530 static int 531 nsim_devlink_param_test2_get(struct devlink *devlink, u32 id, 532 struct devlink_param_gset_ctx *ctx, 533 struct netlink_ext_ack *extack) 534 { 535 struct nsim_dev *nsim_dev = devlink_priv(devlink); 536 537 ctx->val.vu32 = nsim_dev->test2; 538 return 0; 539 } 540 541 static int 542 nsim_devlink_param_test2_set(struct devlink *devlink, u32 id, 543 struct devlink_param_gset_ctx *ctx, 544 struct netlink_ext_ack *extack) 545 { 546 struct nsim_dev *nsim_dev = devlink_priv(devlink); 547 548 nsim_dev->test2 = ctx->val.vu32; 549 return 0; 550 } 551 552 #define NSIM_DEV_TEST2_DEFAULT 1234 553 554 static int 555 nsim_devlink_param_test2_get_default(struct devlink *devlink, u32 id, 556 struct devlink_param_gset_ctx *ctx, 557 struct netlink_ext_ack *extack) 558 { 559 ctx->val.vu32 = NSIM_DEV_TEST2_DEFAULT; 560 return 0; 561 } 562 563 static int 564 nsim_devlink_param_test2_reset_default(struct devlink *devlink, u32 id, 565 enum devlink_param_cmode cmode, 566 struct netlink_ext_ack *extack) 567 { 568 struct nsim_dev *nsim_dev = devlink_priv(devlink); 569 570 nsim_dev->test2 = NSIM_DEV_TEST2_DEFAULT; 571 return 0; 572 } 573 574 static const struct devlink_param nsim_devlink_params[] = { 575 DEVLINK_PARAM_GENERIC(MAX_MACS, 576 BIT(DEVLINK_PARAM_CMODE_DRIVERINIT), 577 NULL, NULL, NULL), 578 DEVLINK_PARAM_DRIVER(NSIM_DEVLINK_PARAM_ID_TEST1, 579 "test1", DEVLINK_PARAM_TYPE_BOOL, 580 BIT(DEVLINK_PARAM_CMODE_DRIVERINIT), 581 NULL, NULL, NULL), 582 DEVLINK_PARAM_DRIVER_WITH_DEFAULTS(NSIM_DEVLINK_PARAM_ID_TEST2, 583 "test2", DEVLINK_PARAM_TYPE_U32, 584 BIT(DEVLINK_PARAM_CMODE_RUNTIME), 585 nsim_devlink_param_test2_get, 586 nsim_devlink_param_test2_set, 587 NULL, 588 nsim_devlink_param_test2_get_default, 589 nsim_devlink_param_test2_reset_default), 590 }; 591 592 static void nsim_devlink_set_params_init_values(struct nsim_dev *nsim_dev, 593 struct devlink *devlink) 594 { 595 union devlink_param_value value; 596 597 value.vu32 = nsim_dev->max_macs; 598 devl_param_driverinit_value_set(devlink, 599 DEVLINK_PARAM_GENERIC_ID_MAX_MACS, 600 value); 601 value.vbool = nsim_dev->test1; 602 devl_param_driverinit_value_set(devlink, 603 NSIM_DEVLINK_PARAM_ID_TEST1, 604 value); 605 } 606 607 static void nsim_devlink_param_load_driverinit_values(struct devlink *devlink) 608 { 609 struct nsim_dev *nsim_dev = devlink_priv(devlink); 610 union devlink_param_value saved_value; 611 int err; 612 613 err = devl_param_driverinit_value_get(devlink, 614 DEVLINK_PARAM_GENERIC_ID_MAX_MACS, 615 &saved_value); 616 if (!err) 617 nsim_dev->max_macs = saved_value.vu32; 618 err = devl_param_driverinit_value_get(devlink, 619 NSIM_DEVLINK_PARAM_ID_TEST1, 620 &saved_value); 621 if (!err) 622 nsim_dev->test1 = saved_value.vbool; 623 } 624 625 #define NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX 16 626 627 static const struct devlink_region_ops dummy_region_ops = { 628 .name = "dummy", 629 .destructor = &kfree, 630 .snapshot = nsim_dev_take_snapshot, 631 }; 632 633 static int nsim_dev_dummy_region_init(struct nsim_dev *nsim_dev, 634 struct devlink *devlink) 635 { 636 nsim_dev->dummy_region = 637 devl_region_create(devlink, &dummy_region_ops, 638 NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX, 639 NSIM_DEV_DUMMY_REGION_SIZE); 640 return PTR_ERR_OR_ZERO(nsim_dev->dummy_region); 641 } 642 643 static void nsim_dev_dummy_region_exit(struct nsim_dev *nsim_dev) 644 { 645 devl_region_destroy(nsim_dev->dummy_region); 646 } 647 648 static int 649 __nsim_dev_port_add(struct nsim_dev *nsim_dev, enum nsim_dev_port_type type, 650 unsigned int port_index, u8 perm_addr[ETH_ALEN]); 651 static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port); 652 653 static int nsim_esw_legacy_enable(struct nsim_dev *nsim_dev, 654 struct netlink_ext_ack *extack) 655 { 656 struct devlink *devlink = priv_to_devlink(nsim_dev); 657 struct nsim_dev_port *nsim_dev_port, *tmp; 658 659 devl_rate_nodes_destroy(devlink); 660 list_for_each_entry_safe(nsim_dev_port, tmp, &nsim_dev->port_list, list) 661 if (nsim_dev_port_is_vf(nsim_dev_port)) 662 __nsim_dev_port_del(nsim_dev_port); 663 nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_LEGACY; 664 return 0; 665 } 666 667 static int nsim_esw_switchdev_enable(struct nsim_dev *nsim_dev, 668 struct netlink_ext_ack *extack) 669 { 670 struct nsim_dev_port *nsim_dev_port, *tmp; 671 int i, err; 672 673 for (i = 0; i < nsim_dev_get_vfs(nsim_dev); i++) { 674 err = __nsim_dev_port_add(nsim_dev, NSIM_DEV_PORT_TYPE_VF, i, NULL); 675 if (err) { 676 NL_SET_ERR_MSG_MOD(extack, "Failed to initialize VFs' netdevsim ports"); 677 pr_err("Failed to initialize VF id=%d. %d.\n", i, err); 678 goto err_port_add_vfs; 679 } 680 } 681 nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_SWITCHDEV; 682 return 0; 683 684 err_port_add_vfs: 685 list_for_each_entry_safe(nsim_dev_port, tmp, &nsim_dev->port_list, list) 686 if (nsim_dev_port_is_vf(nsim_dev_port)) 687 __nsim_dev_port_del(nsim_dev_port); 688 return err; 689 } 690 691 static int nsim_devlink_eswitch_mode_set(struct devlink *devlink, u16 mode, 692 struct netlink_ext_ack *extack) 693 { 694 struct nsim_dev *nsim_dev = devlink_priv(devlink); 695 696 if (mode == nsim_dev->esw_mode) 697 return 0; 698 699 if (mode == DEVLINK_ESWITCH_MODE_LEGACY) 700 return nsim_esw_legacy_enable(nsim_dev, extack); 701 if (mode == DEVLINK_ESWITCH_MODE_SWITCHDEV) 702 return nsim_esw_switchdev_enable(nsim_dev, extack); 703 704 return -EINVAL; 705 } 706 707 static int nsim_devlink_eswitch_mode_get(struct devlink *devlink, u16 *mode) 708 { 709 struct nsim_dev *nsim_dev = devlink_priv(devlink); 710 711 *mode = nsim_dev->esw_mode; 712 return 0; 713 } 714 715 struct nsim_trap_item { 716 void *trap_ctx; 717 enum devlink_trap_action action; 718 }; 719 720 struct nsim_trap_data { 721 struct delayed_work trap_report_dw; 722 struct nsim_trap_item *trap_items_arr; 723 u64 *trap_policers_cnt_arr; 724 u64 trap_pkt_cnt; 725 struct nsim_dev *nsim_dev; 726 spinlock_t trap_lock; /* Protects trap_items_arr */ 727 }; 728 729 /* All driver-specific traps must be documented in 730 * Documentation/networking/devlink/netdevsim.rst 731 */ 732 enum { 733 NSIM_TRAP_ID_BASE = DEVLINK_TRAP_GENERIC_ID_MAX, 734 NSIM_TRAP_ID_FID_MISS, 735 }; 736 737 #define NSIM_TRAP_NAME_FID_MISS "fid_miss" 738 739 #define NSIM_TRAP_METADATA DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT 740 741 #define NSIM_TRAP_DROP(_id, _group_id) \ 742 DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \ 743 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ 744 NSIM_TRAP_METADATA) 745 #define NSIM_TRAP_DROP_EXT(_id, _group_id, _metadata) \ 746 DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \ 747 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ 748 NSIM_TRAP_METADATA | (_metadata)) 749 #define NSIM_TRAP_EXCEPTION(_id, _group_id) \ 750 DEVLINK_TRAP_GENERIC(EXCEPTION, TRAP, _id, \ 751 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ 752 NSIM_TRAP_METADATA) 753 #define NSIM_TRAP_CONTROL(_id, _group_id, _action) \ 754 DEVLINK_TRAP_GENERIC(CONTROL, _action, _id, \ 755 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ 756 NSIM_TRAP_METADATA) 757 #define NSIM_TRAP_DRIVER_EXCEPTION(_id, _group_id) \ 758 DEVLINK_TRAP_DRIVER(EXCEPTION, TRAP, NSIM_TRAP_ID_##_id, \ 759 NSIM_TRAP_NAME_##_id, \ 760 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \ 761 NSIM_TRAP_METADATA) 762 763 #define NSIM_DEV_TRAP_POLICER_MIN_RATE 1 764 #define NSIM_DEV_TRAP_POLICER_MAX_RATE 8000 765 #define NSIM_DEV_TRAP_POLICER_MIN_BURST 8 766 #define NSIM_DEV_TRAP_POLICER_MAX_BURST 65536 767 768 #define NSIM_TRAP_POLICER(_id, _rate, _burst) \ 769 DEVLINK_TRAP_POLICER(_id, _rate, _burst, \ 770 NSIM_DEV_TRAP_POLICER_MAX_RATE, \ 771 NSIM_DEV_TRAP_POLICER_MIN_RATE, \ 772 NSIM_DEV_TRAP_POLICER_MAX_BURST, \ 773 NSIM_DEV_TRAP_POLICER_MIN_BURST) 774 775 static const struct devlink_trap_policer nsim_trap_policers_arr[] = { 776 NSIM_TRAP_POLICER(1, 1000, 128), 777 NSIM_TRAP_POLICER(2, 2000, 256), 778 NSIM_TRAP_POLICER(3, 3000, 512), 779 }; 780 781 static const struct devlink_trap_group nsim_trap_groups_arr[] = { 782 DEVLINK_TRAP_GROUP_GENERIC(L2_DROPS, 0), 783 DEVLINK_TRAP_GROUP_GENERIC(L3_DROPS, 1), 784 DEVLINK_TRAP_GROUP_GENERIC(L3_EXCEPTIONS, 1), 785 DEVLINK_TRAP_GROUP_GENERIC(BUFFER_DROPS, 2), 786 DEVLINK_TRAP_GROUP_GENERIC(ACL_DROPS, 3), 787 DEVLINK_TRAP_GROUP_GENERIC(MC_SNOOPING, 3), 788 }; 789 790 static const struct devlink_trap nsim_traps_arr[] = { 791 NSIM_TRAP_DROP(SMAC_MC, L2_DROPS), 792 NSIM_TRAP_DROP(VLAN_TAG_MISMATCH, L2_DROPS), 793 NSIM_TRAP_DROP(INGRESS_VLAN_FILTER, L2_DROPS), 794 NSIM_TRAP_DROP(INGRESS_STP_FILTER, L2_DROPS), 795 NSIM_TRAP_DROP(EMPTY_TX_LIST, L2_DROPS), 796 NSIM_TRAP_DROP(PORT_LOOPBACK_FILTER, L2_DROPS), 797 NSIM_TRAP_DRIVER_EXCEPTION(FID_MISS, L2_DROPS), 798 NSIM_TRAP_DROP(BLACKHOLE_ROUTE, L3_DROPS), 799 NSIM_TRAP_EXCEPTION(TTL_ERROR, L3_EXCEPTIONS), 800 NSIM_TRAP_DROP(TAIL_DROP, BUFFER_DROPS), 801 NSIM_TRAP_DROP_EXT(INGRESS_FLOW_ACTION_DROP, ACL_DROPS, 802 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE), 803 NSIM_TRAP_DROP_EXT(EGRESS_FLOW_ACTION_DROP, ACL_DROPS, 804 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE), 805 NSIM_TRAP_CONTROL(IGMP_QUERY, MC_SNOOPING, MIRROR), 806 NSIM_TRAP_CONTROL(IGMP_V1_REPORT, MC_SNOOPING, TRAP), 807 }; 808 809 #define NSIM_TRAP_L4_DATA_LEN 100 810 811 static struct sk_buff *nsim_dev_trap_skb_build(void) 812 { 813 int tot_len, data_len = NSIM_TRAP_L4_DATA_LEN; 814 struct sk_buff *skb; 815 struct udphdr *udph; 816 struct ethhdr *eth; 817 struct iphdr *iph; 818 819 skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); 820 if (!skb) 821 return NULL; 822 tot_len = sizeof(struct iphdr) + sizeof(struct udphdr) + data_len; 823 824 skb_reset_mac_header(skb); 825 eth = skb_put(skb, sizeof(struct ethhdr)); 826 eth_random_addr(eth->h_dest); 827 eth_random_addr(eth->h_source); 828 eth->h_proto = htons(ETH_P_IP); 829 skb->protocol = htons(ETH_P_IP); 830 831 skb_set_network_header(skb, skb->len); 832 iph = skb_put(skb, sizeof(struct iphdr)); 833 iph->protocol = IPPROTO_UDP; 834 iph->saddr = in_aton("192.0.2.1"); 835 iph->daddr = in_aton("198.51.100.1"); 836 iph->version = 0x4; 837 iph->frag_off = 0; 838 iph->ihl = 0x5; 839 iph->tot_len = htons(tot_len); 840 iph->ttl = 100; 841 iph->check = 0; 842 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl); 843 844 skb_set_transport_header(skb, skb->len); 845 udph = skb_put_zero(skb, sizeof(struct udphdr) + data_len); 846 get_random_bytes(&udph->source, sizeof(u16)); 847 get_random_bytes(&udph->dest, sizeof(u16)); 848 udph->len = htons(sizeof(struct udphdr) + data_len); 849 850 return skb; 851 } 852 853 static void nsim_dev_trap_report(struct nsim_dev_port *nsim_dev_port) 854 { 855 struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev; 856 struct devlink *devlink = priv_to_devlink(nsim_dev); 857 struct nsim_trap_data *nsim_trap_data; 858 int i; 859 860 nsim_trap_data = nsim_dev->trap_data; 861 862 spin_lock(&nsim_trap_data->trap_lock); 863 for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) { 864 struct flow_action_cookie *fa_cookie = NULL; 865 struct nsim_trap_item *nsim_trap_item; 866 struct sk_buff *skb; 867 bool has_fa_cookie; 868 869 has_fa_cookie = nsim_traps_arr[i].metadata_cap & 870 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE; 871 872 nsim_trap_item = &nsim_trap_data->trap_items_arr[i]; 873 if (nsim_trap_item->action == DEVLINK_TRAP_ACTION_DROP) 874 continue; 875 876 skb = nsim_dev_trap_skb_build(); 877 if (!skb) 878 continue; 879 skb->dev = nsim_dev_port->ns->netdev; 880 881 /* Trapped packets are usually passed to devlink in softIRQ, 882 * but in this case they are generated in a workqueue. Disable 883 * softIRQs to prevent lockdep from complaining about 884 * "incosistent lock state". 885 */ 886 887 spin_lock_bh(&nsim_dev->fa_cookie_lock); 888 fa_cookie = has_fa_cookie ? nsim_dev->fa_cookie : NULL; 889 devlink_trap_report(devlink, skb, nsim_trap_item->trap_ctx, 890 &nsim_dev_port->devlink_port, fa_cookie); 891 spin_unlock_bh(&nsim_dev->fa_cookie_lock); 892 consume_skb(skb); 893 } 894 spin_unlock(&nsim_trap_data->trap_lock); 895 } 896 897 #define NSIM_TRAP_REPORT_INTERVAL_MS 100 898 899 static void nsim_dev_trap_report_work(struct work_struct *work) 900 { 901 struct nsim_trap_data *nsim_trap_data; 902 struct nsim_dev_port *nsim_dev_port; 903 struct nsim_dev *nsim_dev; 904 905 nsim_trap_data = container_of(work, struct nsim_trap_data, 906 trap_report_dw.work); 907 nsim_dev = nsim_trap_data->nsim_dev; 908 909 if (!devl_trylock(priv_to_devlink(nsim_dev))) { 910 queue_delayed_work(system_dfl_wq, 911 &nsim_dev->trap_data->trap_report_dw, 1); 912 return; 913 } 914 915 /* For each running port and enabled packet trap, generate a UDP 916 * packet with a random 5-tuple and report it. 917 */ 918 list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list) { 919 if (!netif_running(nsim_dev_port->ns->netdev)) 920 continue; 921 922 nsim_dev_trap_report(nsim_dev_port); 923 cond_resched(); 924 } 925 devl_unlock(priv_to_devlink(nsim_dev)); 926 queue_delayed_work(system_dfl_wq, 927 &nsim_dev->trap_data->trap_report_dw, 928 msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS)); 929 } 930 931 static int nsim_dev_traps_init(struct devlink *devlink) 932 { 933 size_t policers_count = ARRAY_SIZE(nsim_trap_policers_arr); 934 struct nsim_dev *nsim_dev = devlink_priv(devlink); 935 struct nsim_trap_data *nsim_trap_data; 936 int err; 937 938 nsim_trap_data = kzalloc(sizeof(*nsim_trap_data), GFP_KERNEL); 939 if (!nsim_trap_data) 940 return -ENOMEM; 941 942 nsim_trap_data->trap_items_arr = kcalloc(ARRAY_SIZE(nsim_traps_arr), 943 sizeof(struct nsim_trap_item), 944 GFP_KERNEL); 945 if (!nsim_trap_data->trap_items_arr) { 946 err = -ENOMEM; 947 goto err_trap_data_free; 948 } 949 950 nsim_trap_data->trap_policers_cnt_arr = kcalloc(policers_count, 951 sizeof(u64), 952 GFP_KERNEL); 953 if (!nsim_trap_data->trap_policers_cnt_arr) { 954 err = -ENOMEM; 955 goto err_trap_items_free; 956 } 957 958 /* The lock is used to protect the action state of the registered 959 * traps. The value is written by user and read in delayed work when 960 * iterating over all the traps. 961 */ 962 spin_lock_init(&nsim_trap_data->trap_lock); 963 nsim_trap_data->nsim_dev = nsim_dev; 964 nsim_dev->trap_data = nsim_trap_data; 965 966 err = devl_trap_policers_register(devlink, nsim_trap_policers_arr, 967 policers_count); 968 if (err) 969 goto err_trap_policers_cnt_free; 970 971 err = devl_trap_groups_register(devlink, nsim_trap_groups_arr, 972 ARRAY_SIZE(nsim_trap_groups_arr)); 973 if (err) 974 goto err_trap_policers_unregister; 975 976 err = devl_traps_register(devlink, nsim_traps_arr, 977 ARRAY_SIZE(nsim_traps_arr), NULL); 978 if (err) 979 goto err_trap_groups_unregister; 980 981 INIT_DELAYED_WORK(&nsim_dev->trap_data->trap_report_dw, 982 nsim_dev_trap_report_work); 983 queue_delayed_work(system_dfl_wq, 984 &nsim_dev->trap_data->trap_report_dw, 985 msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS)); 986 987 return 0; 988 989 err_trap_groups_unregister: 990 devl_trap_groups_unregister(devlink, nsim_trap_groups_arr, 991 ARRAY_SIZE(nsim_trap_groups_arr)); 992 err_trap_policers_unregister: 993 devl_trap_policers_unregister(devlink, nsim_trap_policers_arr, 994 ARRAY_SIZE(nsim_trap_policers_arr)); 995 err_trap_policers_cnt_free: 996 kfree(nsim_trap_data->trap_policers_cnt_arr); 997 err_trap_items_free: 998 kfree(nsim_trap_data->trap_items_arr); 999 err_trap_data_free: 1000 kfree(nsim_trap_data); 1001 return err; 1002 } 1003 1004 static void nsim_dev_traps_exit(struct devlink *devlink) 1005 { 1006 struct nsim_dev *nsim_dev = devlink_priv(devlink); 1007 1008 /* caution, trap work takes devlink lock */ 1009 cancel_delayed_work_sync(&nsim_dev->trap_data->trap_report_dw); 1010 devl_traps_unregister(devlink, nsim_traps_arr, 1011 ARRAY_SIZE(nsim_traps_arr)); 1012 devl_trap_groups_unregister(devlink, nsim_trap_groups_arr, 1013 ARRAY_SIZE(nsim_trap_groups_arr)); 1014 devl_trap_policers_unregister(devlink, nsim_trap_policers_arr, 1015 ARRAY_SIZE(nsim_trap_policers_arr)); 1016 kfree(nsim_dev->trap_data->trap_policers_cnt_arr); 1017 kfree(nsim_dev->trap_data->trap_items_arr); 1018 kfree(nsim_dev->trap_data); 1019 } 1020 1021 static int nsim_dev_reload_create(struct nsim_dev *nsim_dev, 1022 struct netlink_ext_ack *extack); 1023 static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev); 1024 1025 static int nsim_dev_reload_down(struct devlink *devlink, bool netns_change, 1026 enum devlink_reload_action action, enum devlink_reload_limit limit, 1027 struct netlink_ext_ack *extack) 1028 { 1029 struct nsim_dev *nsim_dev = devlink_priv(devlink); 1030 1031 if (nsim_dev->dont_allow_reload) { 1032 /* For testing purposes, user set debugfs dont_allow_reload 1033 * value to true. So forbid it. 1034 */ 1035 NL_SET_ERR_MSG_MOD(extack, "User forbid the reload for testing purposes"); 1036 return -EOPNOTSUPP; 1037 } 1038 1039 nsim_dev_reload_destroy(nsim_dev); 1040 return 0; 1041 } 1042 1043 static int nsim_dev_reload_up(struct devlink *devlink, enum devlink_reload_action action, 1044 enum devlink_reload_limit limit, u32 *actions_performed, 1045 struct netlink_ext_ack *extack) 1046 { 1047 struct nsim_dev *nsim_dev = devlink_priv(devlink); 1048 1049 if (nsim_dev->fail_reload) { 1050 /* For testing purposes, user set debugfs fail_reload 1051 * value to true. Fail right away. 1052 */ 1053 NL_SET_ERR_MSG_MOD(extack, "User setup the reload to fail for testing purposes"); 1054 return -EINVAL; 1055 } 1056 1057 *actions_performed = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT); 1058 1059 return nsim_dev_reload_create(nsim_dev, extack); 1060 } 1061 1062 static int nsim_dev_info_get(struct devlink *devlink, 1063 struct devlink_info_req *req, 1064 struct netlink_ext_ack *extack) 1065 { 1066 int err; 1067 1068 err = devlink_info_version_stored_put_ext(req, "fw.mgmt", "10.20.30", 1069 DEVLINK_INFO_VERSION_TYPE_COMPONENT); 1070 if (err) 1071 return err; 1072 return devlink_info_version_running_put_ext(req, "fw.mgmt", "10.20.30", 1073 DEVLINK_INFO_VERSION_TYPE_COMPONENT); 1074 } 1075 1076 #define NSIM_DEV_FLASH_SIZE 50000 1077 #define NSIM_DEV_FLASH_CHUNK_SIZE 1000 1078 #define NSIM_DEV_FLASH_CHUNK_TIME_MS_DEFAULT 100 1079 1080 static int nsim_dev_flash_update(struct devlink *devlink, 1081 struct devlink_flash_update_params *params, 1082 struct netlink_ext_ack *extack) 1083 { 1084 struct nsim_dev *nsim_dev = devlink_priv(devlink); 1085 int i; 1086 1087 if ((params->overwrite_mask & ~nsim_dev->fw_update_overwrite_mask) != 0) 1088 return -EOPNOTSUPP; 1089 1090 if (nsim_dev->fw_update_status) { 1091 devlink_flash_update_status_notify(devlink, 1092 "Preparing to flash", 1093 params->component, 0, 0); 1094 } 1095 1096 for (i = 0; i < NSIM_DEV_FLASH_SIZE / NSIM_DEV_FLASH_CHUNK_SIZE; i++) { 1097 if (nsim_dev->fw_update_status) 1098 devlink_flash_update_status_notify(devlink, "Flashing", 1099 params->component, 1100 i * NSIM_DEV_FLASH_CHUNK_SIZE, 1101 NSIM_DEV_FLASH_SIZE); 1102 msleep(nsim_dev->fw_update_flash_chunk_time_ms ?: 1); 1103 } 1104 1105 if (nsim_dev->fw_update_status) { 1106 devlink_flash_update_status_notify(devlink, "Flashing", 1107 params->component, 1108 NSIM_DEV_FLASH_SIZE, 1109 NSIM_DEV_FLASH_SIZE); 1110 devlink_flash_update_timeout_notify(devlink, "Flash select", 1111 params->component, 81); 1112 devlink_flash_update_status_notify(devlink, "Flashing done", 1113 params->component, 0, 0); 1114 } 1115 1116 return 0; 1117 } 1118 1119 static struct nsim_trap_item * 1120 nsim_dev_trap_item_lookup(struct nsim_dev *nsim_dev, u16 trap_id) 1121 { 1122 struct nsim_trap_data *nsim_trap_data = nsim_dev->trap_data; 1123 int i; 1124 1125 for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) { 1126 if (nsim_traps_arr[i].id == trap_id) 1127 return &nsim_trap_data->trap_items_arr[i]; 1128 } 1129 1130 return NULL; 1131 } 1132 1133 static int nsim_dev_devlink_trap_init(struct devlink *devlink, 1134 const struct devlink_trap *trap, 1135 void *trap_ctx) 1136 { 1137 struct nsim_dev *nsim_dev = devlink_priv(devlink); 1138 struct nsim_trap_item *nsim_trap_item; 1139 1140 nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id); 1141 if (WARN_ON(!nsim_trap_item)) 1142 return -ENOENT; 1143 1144 nsim_trap_item->trap_ctx = trap_ctx; 1145 nsim_trap_item->action = trap->init_action; 1146 1147 return 0; 1148 } 1149 1150 static int 1151 nsim_dev_devlink_trap_action_set(struct devlink *devlink, 1152 const struct devlink_trap *trap, 1153 enum devlink_trap_action action, 1154 struct netlink_ext_ack *extack) 1155 { 1156 struct nsim_dev *nsim_dev = devlink_priv(devlink); 1157 struct nsim_trap_item *nsim_trap_item; 1158 1159 nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id); 1160 if (WARN_ON(!nsim_trap_item)) 1161 return -ENOENT; 1162 1163 spin_lock(&nsim_dev->trap_data->trap_lock); 1164 nsim_trap_item->action = action; 1165 spin_unlock(&nsim_dev->trap_data->trap_lock); 1166 1167 return 0; 1168 } 1169 1170 static int 1171 nsim_dev_devlink_trap_group_set(struct devlink *devlink, 1172 const struct devlink_trap_group *group, 1173 const struct devlink_trap_policer *policer, 1174 struct netlink_ext_ack *extack) 1175 { 1176 struct nsim_dev *nsim_dev = devlink_priv(devlink); 1177 1178 if (nsim_dev->fail_trap_group_set) 1179 return -EINVAL; 1180 1181 return 0; 1182 } 1183 1184 static int 1185 nsim_dev_devlink_trap_policer_set(struct devlink *devlink, 1186 const struct devlink_trap_policer *policer, 1187 u64 rate, u64 burst, 1188 struct netlink_ext_ack *extack) 1189 { 1190 struct nsim_dev *nsim_dev = devlink_priv(devlink); 1191 1192 if (nsim_dev->fail_trap_policer_set) { 1193 NL_SET_ERR_MSG_MOD(extack, "User setup the operation to fail for testing purposes"); 1194 return -EINVAL; 1195 } 1196 1197 return 0; 1198 } 1199 1200 static int 1201 nsim_dev_devlink_trap_policer_counter_get(struct devlink *devlink, 1202 const struct devlink_trap_policer *policer, 1203 u64 *p_drops) 1204 { 1205 struct nsim_dev *nsim_dev = devlink_priv(devlink); 1206 u64 *cnt; 1207 1208 if (nsim_dev->fail_trap_policer_counter_get) 1209 return -EINVAL; 1210 1211 cnt = &nsim_dev->trap_data->trap_policers_cnt_arr[policer->id - 1]; 1212 *p_drops = (*cnt)++; 1213 1214 return 0; 1215 } 1216 1217 #define NSIM_LINK_SPEED_MAX 5000 /* Mbps */ 1218 #define NSIM_LINK_SPEED_UNIT 125000 /* 1 Mbps given in bytes/sec to avoid 1219 * u64 overflow during conversion from 1220 * bytes to bits. 1221 */ 1222 1223 static int nsim_rate_bytes_to_units(char *name, u64 *rate, struct netlink_ext_ack *extack) 1224 { 1225 u64 val; 1226 u32 rem; 1227 1228 val = div_u64_rem(*rate, NSIM_LINK_SPEED_UNIT, &rem); 1229 if (rem) { 1230 pr_err("%s rate value %lluBps not in link speed units of 1Mbps.\n", 1231 name, *rate); 1232 NL_SET_ERR_MSG_MOD(extack, "TX rate value not in link speed units of 1Mbps."); 1233 return -EINVAL; 1234 } 1235 1236 if (val > NSIM_LINK_SPEED_MAX) { 1237 pr_err("%s rate value %lluMbps exceed link maximum speed 5000Mbps.\n", 1238 name, val); 1239 NL_SET_ERR_MSG_MOD(extack, "TX rate value exceed link maximum speed 5000Mbps."); 1240 return -EINVAL; 1241 } 1242 *rate = val; 1243 return 0; 1244 } 1245 1246 static int nsim_leaf_tc_bw_set(struct devlink_rate *devlink_rate, 1247 void *priv, u32 *tc_bw, 1248 struct netlink_ext_ack *extack) 1249 { 1250 struct nsim_dev_port *nsim_dev_port = priv; 1251 int i; 1252 1253 for (i = 0; i < DEVLINK_RATE_TCS_MAX; i++) 1254 nsim_dev_port->tc_bw[i] = tc_bw[i]; 1255 1256 return 0; 1257 } 1258 1259 static int nsim_leaf_tx_share_set(struct devlink_rate *devlink_rate, void *priv, 1260 u64 tx_share, struct netlink_ext_ack *extack) 1261 { 1262 struct nsim_dev_port *nsim_dev_port = priv; 1263 struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev; 1264 int vf_id = nsim_dev_port_index_to_vf_index(nsim_dev_port->port_index); 1265 int err; 1266 1267 err = nsim_rate_bytes_to_units("tx_share", &tx_share, extack); 1268 if (err) 1269 return err; 1270 1271 nsim_dev->vfconfigs[vf_id].min_tx_rate = tx_share; 1272 return 0; 1273 } 1274 1275 static int nsim_leaf_tx_max_set(struct devlink_rate *devlink_rate, void *priv, 1276 u64 tx_max, struct netlink_ext_ack *extack) 1277 { 1278 struct nsim_dev_port *nsim_dev_port = priv; 1279 struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev; 1280 int vf_id = nsim_dev_port_index_to_vf_index(nsim_dev_port->port_index); 1281 int err; 1282 1283 err = nsim_rate_bytes_to_units("tx_max", &tx_max, extack); 1284 if (err) 1285 return err; 1286 1287 nsim_dev->vfconfigs[vf_id].max_tx_rate = tx_max; 1288 return 0; 1289 } 1290 1291 struct nsim_rate_node { 1292 struct dentry *ddir; 1293 struct dentry *rate_parent; 1294 char *parent_name; 1295 u16 tx_share; 1296 u16 tx_max; 1297 u32 tc_bw[DEVLINK_RATE_TCS_MAX]; 1298 }; 1299 1300 static int nsim_node_tc_bw_set(struct devlink_rate *devlink_rate, void *priv, 1301 u32 *tc_bw, struct netlink_ext_ack *extack) 1302 { 1303 struct nsim_rate_node *nsim_node = priv; 1304 int i; 1305 1306 for (i = 0; i < DEVLINK_RATE_TCS_MAX; i++) 1307 nsim_node->tc_bw[i] = tc_bw[i]; 1308 1309 return 0; 1310 } 1311 1312 static int nsim_node_tx_share_set(struct devlink_rate *devlink_rate, void *priv, 1313 u64 tx_share, struct netlink_ext_ack *extack) 1314 { 1315 struct nsim_rate_node *nsim_node = priv; 1316 int err; 1317 1318 err = nsim_rate_bytes_to_units("tx_share", &tx_share, extack); 1319 if (err) 1320 return err; 1321 1322 nsim_node->tx_share = tx_share; 1323 return 0; 1324 } 1325 1326 static int nsim_node_tx_max_set(struct devlink_rate *devlink_rate, void *priv, 1327 u64 tx_max, struct netlink_ext_ack *extack) 1328 { 1329 struct nsim_rate_node *nsim_node = priv; 1330 int err; 1331 1332 err = nsim_rate_bytes_to_units("tx_max", &tx_max, extack); 1333 if (err) 1334 return err; 1335 1336 nsim_node->tx_max = tx_max; 1337 return 0; 1338 } 1339 1340 static int nsim_rate_node_new(struct devlink_rate *node, void **priv, 1341 struct netlink_ext_ack *extack) 1342 { 1343 struct nsim_dev *nsim_dev = devlink_priv(node->devlink); 1344 struct nsim_rate_node *nsim_node; 1345 1346 if (!nsim_esw_mode_is_switchdev(nsim_dev)) { 1347 NL_SET_ERR_MSG_MOD(extack, "Node creation allowed only in switchdev mode."); 1348 return -EOPNOTSUPP; 1349 } 1350 1351 nsim_node = kzalloc(sizeof(*nsim_node), GFP_KERNEL); 1352 if (!nsim_node) 1353 return -ENOMEM; 1354 1355 nsim_node->ddir = debugfs_create_dir(node->name, nsim_dev->nodes_ddir); 1356 1357 debugfs_create_u16("tx_share", 0400, nsim_node->ddir, &nsim_node->tx_share); 1358 debugfs_create_u16("tx_max", 0400, nsim_node->ddir, &nsim_node->tx_max); 1359 nsim_node->rate_parent = debugfs_create_file("rate_parent", 0400, 1360 nsim_node->ddir, 1361 &nsim_node->parent_name, 1362 &nsim_dev_rate_parent_fops); 1363 1364 nsim_dev_tc_bw_debugfs_init(nsim_node->ddir, nsim_node->tc_bw); 1365 1366 *priv = nsim_node; 1367 return 0; 1368 } 1369 1370 static int nsim_rate_node_del(struct devlink_rate *node, void *priv, 1371 struct netlink_ext_ack *extack) 1372 { 1373 struct nsim_rate_node *nsim_node = priv; 1374 1375 debugfs_remove(nsim_node->rate_parent); 1376 debugfs_remove_recursive(nsim_node->ddir); 1377 kfree(nsim_node); 1378 return 0; 1379 } 1380 1381 static int nsim_rate_leaf_parent_set(struct devlink_rate *child, 1382 struct devlink_rate *parent, 1383 void *priv_child, void *priv_parent, 1384 struct netlink_ext_ack *extack) 1385 { 1386 struct nsim_dev_port *nsim_dev_port = priv_child; 1387 1388 if (parent) 1389 nsim_dev_port->parent_name = parent->name; 1390 else 1391 nsim_dev_port->parent_name = NULL; 1392 return 0; 1393 } 1394 1395 static int nsim_rate_node_parent_set(struct devlink_rate *child, 1396 struct devlink_rate *parent, 1397 void *priv_child, void *priv_parent, 1398 struct netlink_ext_ack *extack) 1399 { 1400 struct nsim_rate_node *nsim_node = priv_child; 1401 1402 if (parent) 1403 nsim_node->parent_name = parent->name; 1404 else 1405 nsim_node->parent_name = NULL; 1406 return 0; 1407 } 1408 1409 static int 1410 nsim_dev_devlink_trap_drop_counter_get(struct devlink *devlink, 1411 const struct devlink_trap *trap, 1412 u64 *p_drops) 1413 { 1414 struct nsim_dev *nsim_dev = devlink_priv(devlink); 1415 u64 *cnt; 1416 1417 if (nsim_dev->fail_trap_drop_counter_get) 1418 return -EINVAL; 1419 1420 cnt = &nsim_dev->trap_data->trap_pkt_cnt; 1421 *p_drops = (*cnt)++; 1422 1423 return 0; 1424 } 1425 1426 static const struct devlink_ops nsim_dev_devlink_ops = { 1427 .eswitch_mode_set = nsim_devlink_eswitch_mode_set, 1428 .eswitch_mode_get = nsim_devlink_eswitch_mode_get, 1429 .supported_flash_update_params = DEVLINK_SUPPORT_FLASH_UPDATE_OVERWRITE_MASK, 1430 .reload_actions = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT), 1431 .reload_down = nsim_dev_reload_down, 1432 .reload_up = nsim_dev_reload_up, 1433 .info_get = nsim_dev_info_get, 1434 .flash_update = nsim_dev_flash_update, 1435 .trap_init = nsim_dev_devlink_trap_init, 1436 .trap_action_set = nsim_dev_devlink_trap_action_set, 1437 .trap_group_set = nsim_dev_devlink_trap_group_set, 1438 .trap_policer_set = nsim_dev_devlink_trap_policer_set, 1439 .trap_policer_counter_get = nsim_dev_devlink_trap_policer_counter_get, 1440 .rate_leaf_tx_share_set = nsim_leaf_tx_share_set, 1441 .rate_leaf_tx_max_set = nsim_leaf_tx_max_set, 1442 .rate_leaf_tc_bw_set = nsim_leaf_tc_bw_set, 1443 .rate_node_tx_share_set = nsim_node_tx_share_set, 1444 .rate_node_tx_max_set = nsim_node_tx_max_set, 1445 .rate_node_tc_bw_set = nsim_node_tc_bw_set, 1446 .rate_node_new = nsim_rate_node_new, 1447 .rate_node_del = nsim_rate_node_del, 1448 .rate_leaf_parent_set = nsim_rate_leaf_parent_set, 1449 .rate_node_parent_set = nsim_rate_node_parent_set, 1450 .trap_drop_counter_get = nsim_dev_devlink_trap_drop_counter_get, 1451 }; 1452 1453 #define NSIM_DEV_MAX_MACS_DEFAULT 32 1454 #define NSIM_DEV_TEST1_DEFAULT true 1455 1456 static int __nsim_dev_port_add(struct nsim_dev *nsim_dev, enum nsim_dev_port_type type, 1457 unsigned int port_index, u8 perm_addr[ETH_ALEN]) 1458 { 1459 struct devlink_port_attrs attrs = {}; 1460 struct nsim_dev_port *nsim_dev_port; 1461 struct devlink_port *devlink_port; 1462 int err; 1463 1464 if (type == NSIM_DEV_PORT_TYPE_VF && !nsim_dev_get_vfs(nsim_dev)) 1465 return -EINVAL; 1466 1467 nsim_dev_port = kzalloc(sizeof(*nsim_dev_port), GFP_KERNEL); 1468 if (!nsim_dev_port) 1469 return -ENOMEM; 1470 nsim_dev_port->port_index = nsim_dev_port_index(type, port_index); 1471 nsim_dev_port->port_type = type; 1472 1473 devlink_port = &nsim_dev_port->devlink_port; 1474 if (nsim_dev_port_is_pf(nsim_dev_port)) { 1475 attrs.flavour = DEVLINK_PORT_FLAVOUR_PHYSICAL; 1476 attrs.phys.port_number = port_index + 1; 1477 } else { 1478 attrs.flavour = DEVLINK_PORT_FLAVOUR_PCI_VF; 1479 attrs.pci_vf.pf = 0; 1480 attrs.pci_vf.vf = port_index; 1481 } 1482 memcpy(attrs.switch_id.id, nsim_dev->switch_id.id, nsim_dev->switch_id.id_len); 1483 attrs.switch_id.id_len = nsim_dev->switch_id.id_len; 1484 devlink_port_attrs_set(devlink_port, &attrs); 1485 err = devl_port_register(priv_to_devlink(nsim_dev), devlink_port, 1486 nsim_dev_port->port_index); 1487 if (err) 1488 goto err_port_free; 1489 1490 err = nsim_dev_port_debugfs_init(nsim_dev, nsim_dev_port); 1491 if (err) 1492 goto err_dl_port_unregister; 1493 1494 nsim_dev_port->ns = nsim_create(nsim_dev, nsim_dev_port, perm_addr); 1495 if (IS_ERR(nsim_dev_port->ns)) { 1496 err = PTR_ERR(nsim_dev_port->ns); 1497 goto err_port_debugfs_exit; 1498 } 1499 1500 if (nsim_dev_port_is_vf(nsim_dev_port)) { 1501 err = devl_rate_leaf_create(&nsim_dev_port->devlink_port, 1502 nsim_dev_port, NULL); 1503 if (err) 1504 goto err_nsim_destroy; 1505 } 1506 1507 list_add(&nsim_dev_port->list, &nsim_dev->port_list); 1508 1509 return 0; 1510 1511 err_nsim_destroy: 1512 nsim_destroy(nsim_dev_port->ns); 1513 err_port_debugfs_exit: 1514 nsim_dev_port_debugfs_exit(nsim_dev_port); 1515 err_dl_port_unregister: 1516 devl_port_unregister(devlink_port); 1517 err_port_free: 1518 kfree(nsim_dev_port); 1519 return err; 1520 } 1521 1522 static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port) 1523 { 1524 struct devlink_port *devlink_port = &nsim_dev_port->devlink_port; 1525 1526 list_del(&nsim_dev_port->list); 1527 if (nsim_dev_port_is_vf(nsim_dev_port)) 1528 devl_rate_leaf_destroy(&nsim_dev_port->devlink_port); 1529 nsim_destroy(nsim_dev_port->ns); 1530 nsim_dev_port_debugfs_exit(nsim_dev_port); 1531 devl_port_unregister(devlink_port); 1532 kfree(nsim_dev_port); 1533 } 1534 1535 static void nsim_dev_port_del_all(struct nsim_dev *nsim_dev) 1536 { 1537 struct nsim_dev_port *nsim_dev_port, *tmp; 1538 1539 list_for_each_entry_safe(nsim_dev_port, tmp, 1540 &nsim_dev->port_list, list) 1541 __nsim_dev_port_del(nsim_dev_port); 1542 } 1543 1544 static int nsim_dev_port_add_all(struct nsim_dev *nsim_dev, 1545 unsigned int port_count) 1546 { 1547 int i, err; 1548 1549 for (i = 0; i < port_count; i++) { 1550 err = __nsim_dev_port_add(nsim_dev, NSIM_DEV_PORT_TYPE_PF, i, NULL); 1551 if (err) 1552 goto err_port_del_all; 1553 } 1554 return 0; 1555 1556 err_port_del_all: 1557 nsim_dev_port_del_all(nsim_dev); 1558 return err; 1559 } 1560 1561 static int nsim_dev_reload_create(struct nsim_dev *nsim_dev, 1562 struct netlink_ext_ack *extack) 1563 { 1564 struct nsim_bus_dev *nsim_bus_dev = nsim_dev->nsim_bus_dev; 1565 struct devlink *devlink; 1566 int err; 1567 1568 devlink = priv_to_devlink(nsim_dev); 1569 nsim_dev = devlink_priv(devlink); 1570 INIT_LIST_HEAD(&nsim_dev->port_list); 1571 nsim_dev->fw_update_status = true; 1572 nsim_dev->fw_update_overwrite_mask = 0; 1573 1574 nsim_devlink_param_load_driverinit_values(devlink); 1575 1576 err = nsim_dev_dummy_region_init(nsim_dev, devlink); 1577 if (err) 1578 return err; 1579 1580 err = nsim_dev_traps_init(devlink); 1581 if (err) 1582 goto err_dummy_region_exit; 1583 1584 nsim_dev->fib_data = nsim_fib_create(devlink, extack); 1585 if (IS_ERR(nsim_dev->fib_data)) { 1586 err = PTR_ERR(nsim_dev->fib_data); 1587 goto err_traps_exit; 1588 } 1589 1590 err = nsim_dev_health_init(nsim_dev, devlink); 1591 if (err) 1592 goto err_fib_destroy; 1593 1594 err = nsim_dev_psample_init(nsim_dev); 1595 if (err) 1596 goto err_health_exit; 1597 1598 err = nsim_dev_hwstats_init(nsim_dev); 1599 if (err) 1600 goto err_psample_exit; 1601 1602 err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count); 1603 if (err) 1604 goto err_hwstats_exit; 1605 1606 nsim_dev->take_snapshot = debugfs_create_file("take_snapshot", 1607 0200, 1608 nsim_dev->ddir, 1609 nsim_dev, 1610 &nsim_dev_take_snapshot_fops); 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_health_exit: 1618 nsim_dev_health_exit(nsim_dev); 1619 err_fib_destroy: 1620 nsim_fib_destroy(devlink, nsim_dev->fib_data); 1621 err_traps_exit: 1622 nsim_dev_traps_exit(devlink); 1623 err_dummy_region_exit: 1624 nsim_dev_dummy_region_exit(nsim_dev); 1625 return err; 1626 } 1627 1628 int nsim_drv_probe(struct nsim_bus_dev *nsim_bus_dev) 1629 { 1630 struct nsim_dev *nsim_dev; 1631 struct devlink *devlink; 1632 int err; 1633 1634 devlink = devlink_alloc_ns(&nsim_dev_devlink_ops, sizeof(*nsim_dev), 1635 nsim_bus_dev->initial_net, &nsim_bus_dev->dev); 1636 if (!devlink) 1637 return -ENOMEM; 1638 devl_lock(devlink); 1639 nsim_dev = devlink_priv(devlink); 1640 nsim_dev->nsim_bus_dev = nsim_bus_dev; 1641 nsim_dev->switch_id.id_len = sizeof(nsim_dev->switch_id.id); 1642 get_random_bytes(nsim_dev->switch_id.id, nsim_dev->switch_id.id_len); 1643 INIT_LIST_HEAD(&nsim_dev->port_list); 1644 nsim_dev->fw_update_status = true; 1645 nsim_dev->fw_update_overwrite_mask = 0; 1646 nsim_dev->fw_update_flash_chunk_time_ms = NSIM_DEV_FLASH_CHUNK_TIME_MS_DEFAULT; 1647 nsim_dev->max_macs = NSIM_DEV_MAX_MACS_DEFAULT; 1648 nsim_dev->test1 = NSIM_DEV_TEST1_DEFAULT; 1649 nsim_dev->test2 = NSIM_DEV_TEST2_DEFAULT; 1650 spin_lock_init(&nsim_dev->fa_cookie_lock); 1651 mutex_init(&nsim_dev->progs_list_lock); 1652 1653 dev_set_drvdata(&nsim_bus_dev->dev, nsim_dev); 1654 1655 nsim_dev->vfconfigs = kcalloc(nsim_bus_dev->max_vfs, 1656 sizeof(struct nsim_vf_config), 1657 GFP_KERNEL | __GFP_NOWARN); 1658 if (!nsim_dev->vfconfigs) { 1659 err = -ENOMEM; 1660 goto err_devlink_unlock; 1661 } 1662 1663 err = devl_register(devlink); 1664 if (err) 1665 goto err_vfc_free; 1666 1667 err = nsim_dev_resources_register(devlink); 1668 if (err) 1669 goto err_dl_unregister; 1670 1671 err = devl_params_register(devlink, nsim_devlink_params, 1672 ARRAY_SIZE(nsim_devlink_params)); 1673 if (err) 1674 goto err_resource_unregister; 1675 nsim_devlink_set_params_init_values(nsim_dev, devlink); 1676 1677 err = nsim_dev_dummy_region_init(nsim_dev, devlink); 1678 if (err) 1679 goto err_params_unregister; 1680 1681 err = nsim_dev_traps_init(devlink); 1682 if (err) 1683 goto err_dummy_region_exit; 1684 1685 err = nsim_dev_debugfs_init(nsim_dev); 1686 if (err) 1687 goto err_traps_exit; 1688 1689 nsim_dev->fib_data = nsim_fib_create(devlink, NULL); 1690 if (IS_ERR(nsim_dev->fib_data)) { 1691 err = PTR_ERR(nsim_dev->fib_data); 1692 goto err_debugfs_exit; 1693 } 1694 1695 err = nsim_dev_health_init(nsim_dev, devlink); 1696 if (err) 1697 goto err_fib_destroy; 1698 1699 err = nsim_bpf_dev_init(nsim_dev); 1700 if (err) 1701 goto err_health_exit; 1702 1703 err = nsim_dev_psample_init(nsim_dev); 1704 if (err) 1705 goto err_bpf_dev_exit; 1706 1707 err = nsim_dev_hwstats_init(nsim_dev); 1708 if (err) 1709 goto err_psample_exit; 1710 1711 err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count); 1712 if (err) 1713 goto err_hwstats_exit; 1714 1715 nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_LEGACY; 1716 devl_unlock(devlink); 1717 return 0; 1718 1719 err_hwstats_exit: 1720 nsim_dev_hwstats_exit(nsim_dev); 1721 err_psample_exit: 1722 nsim_dev_psample_exit(nsim_dev); 1723 err_bpf_dev_exit: 1724 nsim_bpf_dev_exit(nsim_dev); 1725 err_health_exit: 1726 nsim_dev_health_exit(nsim_dev); 1727 err_fib_destroy: 1728 nsim_fib_destroy(devlink, nsim_dev->fib_data); 1729 err_debugfs_exit: 1730 nsim_dev_debugfs_exit(nsim_dev); 1731 err_traps_exit: 1732 nsim_dev_traps_exit(devlink); 1733 err_dummy_region_exit: 1734 nsim_dev_dummy_region_exit(nsim_dev); 1735 err_params_unregister: 1736 devl_params_unregister(devlink, nsim_devlink_params, 1737 ARRAY_SIZE(nsim_devlink_params)); 1738 err_resource_unregister: 1739 devl_resources_unregister(devlink); 1740 err_dl_unregister: 1741 devl_unregister(devlink); 1742 err_vfc_free: 1743 kfree(nsim_dev->vfconfigs); 1744 err_devlink_unlock: 1745 devl_unlock(devlink); 1746 devlink_free(devlink); 1747 dev_set_drvdata(&nsim_bus_dev->dev, NULL); 1748 return err; 1749 } 1750 1751 static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev) 1752 { 1753 struct devlink *devlink = priv_to_devlink(nsim_dev); 1754 1755 if (devlink_is_reload_failed(devlink)) 1756 return; 1757 debugfs_remove(nsim_dev->take_snapshot); 1758 1759 if (nsim_dev_get_vfs(nsim_dev)) { 1760 nsim_bus_dev_set_vfs(nsim_dev->nsim_bus_dev, 0); 1761 if (nsim_esw_mode_is_switchdev(nsim_dev)) 1762 nsim_esw_legacy_enable(nsim_dev, NULL); 1763 } 1764 1765 nsim_dev_port_del_all(nsim_dev); 1766 nsim_dev_hwstats_exit(nsim_dev); 1767 nsim_dev_psample_exit(nsim_dev); 1768 nsim_dev_health_exit(nsim_dev); 1769 nsim_fib_destroy(devlink, nsim_dev->fib_data); 1770 nsim_dev_traps_exit(devlink); 1771 nsim_dev_dummy_region_exit(nsim_dev); 1772 } 1773 1774 void nsim_drv_remove(struct nsim_bus_dev *nsim_bus_dev) 1775 { 1776 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); 1777 struct devlink *devlink = priv_to_devlink(nsim_dev); 1778 1779 devl_lock(devlink); 1780 nsim_dev_reload_destroy(nsim_dev); 1781 1782 nsim_bpf_dev_exit(nsim_dev); 1783 nsim_dev_debugfs_exit(nsim_dev); 1784 devl_params_unregister(devlink, nsim_devlink_params, 1785 ARRAY_SIZE(nsim_devlink_params)); 1786 devl_resources_unregister(devlink); 1787 devl_unregister(devlink); 1788 kfree(nsim_dev->vfconfigs); 1789 kfree(nsim_dev->fa_cookie); 1790 mutex_destroy(&nsim_dev->progs_list_lock); 1791 devl_unlock(devlink); 1792 devlink_free(devlink); 1793 dev_set_drvdata(&nsim_bus_dev->dev, NULL); 1794 } 1795 1796 static struct nsim_dev_port * 1797 __nsim_dev_port_lookup(struct nsim_dev *nsim_dev, enum nsim_dev_port_type type, 1798 unsigned int port_index) 1799 { 1800 struct nsim_dev_port *nsim_dev_port; 1801 1802 port_index = nsim_dev_port_index(type, port_index); 1803 list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list) 1804 if (nsim_dev_port->port_index == port_index) 1805 return nsim_dev_port; 1806 return NULL; 1807 } 1808 1809 int nsim_drv_port_add(struct nsim_bus_dev *nsim_bus_dev, enum nsim_dev_port_type type, 1810 unsigned int port_index, u8 perm_addr[ETH_ALEN]) 1811 { 1812 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); 1813 int err; 1814 1815 devl_lock(priv_to_devlink(nsim_dev)); 1816 if (__nsim_dev_port_lookup(nsim_dev, type, port_index)) 1817 err = -EEXIST; 1818 else 1819 err = __nsim_dev_port_add(nsim_dev, type, port_index, perm_addr); 1820 devl_unlock(priv_to_devlink(nsim_dev)); 1821 return err; 1822 } 1823 1824 int nsim_drv_port_del(struct nsim_bus_dev *nsim_bus_dev, enum nsim_dev_port_type type, 1825 unsigned int port_index) 1826 { 1827 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); 1828 struct nsim_dev_port *nsim_dev_port; 1829 int err = 0; 1830 1831 devl_lock(priv_to_devlink(nsim_dev)); 1832 nsim_dev_port = __nsim_dev_port_lookup(nsim_dev, type, port_index); 1833 if (!nsim_dev_port) 1834 err = -ENOENT; 1835 else 1836 __nsim_dev_port_del(nsim_dev_port); 1837 devl_unlock(priv_to_devlink(nsim_dev)); 1838 return err; 1839 } 1840 1841 int nsim_drv_configure_vfs(struct nsim_bus_dev *nsim_bus_dev, 1842 unsigned int num_vfs) 1843 { 1844 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev); 1845 struct devlink *devlink = priv_to_devlink(nsim_dev); 1846 int ret = 0; 1847 1848 devl_lock(devlink); 1849 if (nsim_bus_dev->num_vfs == num_vfs) 1850 goto exit_unlock; 1851 if (nsim_bus_dev->num_vfs && num_vfs) { 1852 ret = -EBUSY; 1853 goto exit_unlock; 1854 } 1855 if (nsim_bus_dev->max_vfs < num_vfs) { 1856 ret = -ENOMEM; 1857 goto exit_unlock; 1858 } 1859 1860 nsim_bus_dev_set_vfs(nsim_bus_dev, num_vfs); 1861 if (nsim_esw_mode_is_switchdev(nsim_dev)) { 1862 if (num_vfs) { 1863 ret = nsim_esw_switchdev_enable(nsim_dev, NULL); 1864 if (ret) { 1865 nsim_bus_dev_set_vfs(nsim_bus_dev, 0); 1866 goto exit_unlock; 1867 } 1868 } else { 1869 nsim_esw_legacy_enable(nsim_dev, NULL); 1870 } 1871 } 1872 1873 exit_unlock: 1874 devl_unlock(devlink); 1875 1876 return ret; 1877 } 1878 1879 int nsim_dev_init(void) 1880 { 1881 nsim_dev_ddir = debugfs_create_dir(DRV_NAME, NULL); 1882 return PTR_ERR_OR_ZERO(nsim_dev_ddir); 1883 } 1884 1885 void nsim_dev_exit(void) 1886 { 1887 debugfs_remove_recursive(nsim_dev_ddir); 1888 } 1889