drivers/net/netdevsim/dev.c

   1 /*
   2  * Copyright (c) 2018 Cumulus Networks. All rights reserved.
   3  * Copyright (c) 2018 David Ahern <dsa@cumulusnetworks.com>
   4  * Copyright (c) 2019 Mellanox Technologies. All rights reserved.
   5  *
   6  * This software is licensed under the GNU General License Version 2,
   7  * June 1991 as shown in the file COPYING in the top-level directory of this
   8  * source tree.
   9  *
  10  * THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS"
  11  * WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
  12  * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  13  * FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE
  14  * OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME
  15  * THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
  16  */
  17
  18 #include <linux/debugfs.h>
  19 #include <linux/device.h>
  20 #include <linux/etherdevice.h>
  21 #include <linux/inet.h>
  22 #include <linux/jiffies.h>
  23 #include <linux/kernel.h>
  24 #include <linux/list.h>
  25 #include <linux/mutex.h>
  26 #include <linux/random.h>
  27 #include <linux/rtnetlink.h>
  28 #include <linux/workqueue.h>
  29 #include <net/devlink.h>
  30 #include <net/ip.h>
  31 #include <net/flow_offload.h>
  32 #include <uapi/linux/devlink.h>
  33 #include <uapi/linux/ip.h>
  34 #include <uapi/linux/udp.h>
  35
  36 #include "netdevsim.h"
  37
  38 static unsigned int
  39 nsim_dev_port_index(enum nsim_dev_port_type type, unsigned int port_index)
  40 {
  41         switch (type) {
  42         case NSIM_DEV_PORT_TYPE_VF:
  43                 port_index = NSIM_DEV_VF_PORT_INDEX_BASE + port_index;
  44                 break;
  45         case NSIM_DEV_PORT_TYPE_PF:
  46                 break;
  47         }
  48
  49         return port_index;
  50 }
  51
  52 static inline unsigned int nsim_dev_port_index_to_vf_index(unsigned int port_index)
  53 {
  54         return port_index - NSIM_DEV_VF_PORT_INDEX_BASE;
  55 }
  56
  57 static struct dentry *nsim_dev_ddir;
  58
  59 unsigned int nsim_dev_get_vfs(struct nsim_dev *nsim_dev)
  60 {
  61         WARN_ON(!lockdep_rtnl_is_held() &&
  62                 !devl_lock_is_held(priv_to_devlink(nsim_dev)));
  63
  64         return nsim_dev->nsim_bus_dev->num_vfs;
  65 }
  66
  67 static void
  68 nsim_bus_dev_set_vfs(struct nsim_bus_dev *nsim_bus_dev, unsigned int num_vfs)
  69 {
  70         rtnl_lock();
  71         nsim_bus_dev->num_vfs = num_vfs;
  72         rtnl_unlock();
  73 }
  74
  75 #define NSIM_DEV_DUMMY_REGION_SIZE (1024 * 32)
  76
  77 static int
  78 nsim_dev_take_snapshot(struct devlink *devlink,
  79                        const struct devlink_region_ops *ops,
  80                        struct netlink_ext_ack *extack,
  81                        u8 **data)
  82 {
  83         void *dummy_data;
  84
  85         dummy_data = kmalloc(NSIM_DEV_DUMMY_REGION_SIZE, GFP_KERNEL);
  86         if (!dummy_data)
  87                 return -ENOMEM;
  88
  89         get_random_bytes(dummy_data, NSIM_DEV_DUMMY_REGION_SIZE);
  90
  91         *data = dummy_data;
  92
  93         return 0;
  94 }
  95
  96 static ssize_t nsim_dev_take_snapshot_write(struct file *file,
  97                                             const char __user *data,
  98                                             size_t count, loff_t *ppos)
  99 {
 100         struct nsim_dev *nsim_dev = file->private_data;
 101         struct devlink *devlink;
 102         u8 *dummy_data;
 103         int err;
 104         u32 id;
 105
 106         devlink = priv_to_devlink(nsim_dev);
 107
 108         err = nsim_dev_take_snapshot(devlink, NULL, NULL, &dummy_data);
 109         if (err)
 110                 return err;
 111
 112         err = devlink_region_snapshot_id_get(devlink, &id);
 113         if (err) {
 114                 pr_err("Failed to get snapshot id\n");
 115                 kfree(dummy_data);
 116                 return err;
 117         }
 118         err = devlink_region_snapshot_create(nsim_dev->dummy_region,
 119                                              dummy_data, id);
 120         devlink_region_snapshot_id_put(devlink, id);
 121         if (err) {
 122                 pr_err("Failed to create region snapshot\n");
 123                 kfree(dummy_data);
 124                 return err;
 125         }
 126
 127         return count;
 128 }
 129
 130 static const struct file_operations nsim_dev_take_snapshot_fops = {
 131         .open = simple_open,
 132         .write = nsim_dev_take_snapshot_write,
 133         .llseek = generic_file_llseek,
 134         .owner = THIS_MODULE,
 135 };
 136
 137 static ssize_t nsim_dev_trap_fa_cookie_read(struct file *file,
 138                                             char __user *data,
 139                                             size_t count, loff_t *ppos)
 140 {
 141         struct nsim_dev *nsim_dev = file->private_data;
 142         struct flow_action_cookie *fa_cookie;
 143         unsigned int buf_len;
 144         ssize_t ret;
 145         char *buf;
 146
 147         spin_lock(&nsim_dev->fa_cookie_lock);
 148         fa_cookie = nsim_dev->fa_cookie;
 149         if (!fa_cookie) {
 150                 ret = -EINVAL;
 151                 goto errout;
 152         }
 153         buf_len = fa_cookie->cookie_len * 2;
 154         buf = kmalloc(buf_len, GFP_ATOMIC);
 155         if (!buf) {
 156                 ret = -ENOMEM;
 157                 goto errout;
 158         }
 159         bin2hex(buf, fa_cookie->cookie, fa_cookie->cookie_len);
 160         spin_unlock(&nsim_dev->fa_cookie_lock);
 161
 162         ret = simple_read_from_buffer(data, count, ppos, buf, buf_len);
 163
 164         kfree(buf);
 165         return ret;
 166
 167 errout:
 168         spin_unlock(&nsim_dev->fa_cookie_lock);
 169         return ret;
 170 }
 171
 172 static ssize_t nsim_dev_trap_fa_cookie_write(struct file *file,
 173                                              const char __user *data,
 174                                              size_t count, loff_t *ppos)
 175 {
 176         struct nsim_dev *nsim_dev = file->private_data;
 177         struct flow_action_cookie *fa_cookie;
 178         size_t cookie_len;
 179         ssize_t ret;
 180         char *buf;
 181
 182         if (*ppos != 0)
 183                 return -EINVAL;
 184         cookie_len = (count - 1) / 2;
 185         if ((count - 1) % 2)
 186                 return -EINVAL;
 187         buf = kmalloc(count, GFP_KERNEL | __GFP_NOWARN);
 188         if (!buf)
 189                 return -ENOMEM;
 190
 191         ret = simple_write_to_buffer(buf, count, ppos, data, count);
 192         if (ret < 0)
 193                 goto free_buf;
 194
 195         fa_cookie = kmalloc(sizeof(*fa_cookie) + cookie_len,
 196                             GFP_KERNEL | __GFP_NOWARN);
 197         if (!fa_cookie) {
 198                 ret = -ENOMEM;
 199                 goto free_buf;
 200         }
 201
 202         fa_cookie->cookie_len = cookie_len;
 203         ret = hex2bin(fa_cookie->cookie, buf, cookie_len);
 204         if (ret)
 205                 goto free_fa_cookie;
 206         kfree(buf);
 207
 208         spin_lock(&nsim_dev->fa_cookie_lock);
 209         kfree(nsim_dev->fa_cookie);
 210         nsim_dev->fa_cookie = fa_cookie;
 211         spin_unlock(&nsim_dev->fa_cookie_lock);
 212
 213         return count;
 214
 215 free_fa_cookie:
 216         kfree(fa_cookie);
 217 free_buf:
 218         kfree(buf);
 219         return ret;
 220 }
 221
 222 static const struct file_operations nsim_dev_trap_fa_cookie_fops = {
 223         .open = simple_open,
 224         .read = nsim_dev_trap_fa_cookie_read,
 225         .write = nsim_dev_trap_fa_cookie_write,
 226         .llseek = generic_file_llseek,
 227         .owner = THIS_MODULE,
 228 };
 229
 230 static ssize_t nsim_bus_dev_max_vfs_read(struct file *file, char __user *data,
 231                                          size_t count, loff_t *ppos)
 232 {
 233         struct nsim_dev *nsim_dev = file->private_data;
 234         char buf[11];
 235         ssize_t len;
 236
 237         len = scnprintf(buf, sizeof(buf), "%u\n",
 238                         READ_ONCE(nsim_dev->nsim_bus_dev->max_vfs));
 239
 240         return simple_read_from_buffer(data, count, ppos, buf, len);
 241 }
 242
 243 static ssize_t nsim_bus_dev_max_vfs_write(struct file *file,
 244                                           const char __user *data,
 245                                           size_t count, loff_t *ppos)
 246 {
 247         struct nsim_vf_config *vfconfigs;
 248         struct nsim_dev *nsim_dev;
 249         char buf[10];
 250         ssize_t ret;
 251         u32 val;
 252
 253         if (*ppos != 0)
 254                 return 0;
 255
 256         if (count >= sizeof(buf))
 257                 return -ENOSPC;
 258
 259         ret = copy_from_user(buf, data, count);
 260         if (ret)
 261                 return -EFAULT;
 262         buf[count] = '\0';
 263
 264         ret = kstrtouint(buf, 10, &val);
 265         if (ret)
 266                 return -EINVAL;
 267
 268         /* max_vfs limited by the maximum number of provided port indexes */
 269         if (val > NSIM_DEV_VF_PORT_INDEX_MAX - NSIM_DEV_VF_PORT_INDEX_BASE)
 270                 return -ERANGE;
 271
 272         vfconfigs = kcalloc(val, sizeof(struct nsim_vf_config),
 273                             GFP_KERNEL | __GFP_NOWARN);
 274         if (!vfconfigs)
 275                 return -ENOMEM;
 276
 277         nsim_dev = file->private_data;
 278         devl_lock(priv_to_devlink(nsim_dev));
 279         /* Reject if VFs are configured */
 280         if (nsim_dev_get_vfs(nsim_dev)) {
 281                 ret = -EBUSY;
 282         } else {
 283                 swap(nsim_dev->vfconfigs, vfconfigs);
 284                 WRITE_ONCE(nsim_dev->nsim_bus_dev->max_vfs, val);
 285                 *ppos += count;
 286                 ret = count;
 287         }
 288         devl_unlock(priv_to_devlink(nsim_dev));
 289
 290         kfree(vfconfigs);
 291         return ret;
 292 }
 293
 294 static const struct file_operations nsim_dev_max_vfs_fops = {
 295         .open = simple_open,
 296         .read = nsim_bus_dev_max_vfs_read,
 297         .write = nsim_bus_dev_max_vfs_write,
 298         .llseek = generic_file_llseek,
 299         .owner = THIS_MODULE,
 300 };
 301
 302 static int nsim_dev_debugfs_init(struct nsim_dev *nsim_dev)
 303 {
 304         char dev_ddir_name[sizeof(DRV_NAME) + 10];
 305         int err;
 306
 307         sprintf(dev_ddir_name, DRV_NAME "%u", nsim_dev->nsim_bus_dev->dev.id);
 308         nsim_dev->ddir = debugfs_create_dir(dev_ddir_name, nsim_dev_ddir);
 309         if (IS_ERR(nsim_dev->ddir))
 310                 return PTR_ERR(nsim_dev->ddir);
 311         nsim_dev->ports_ddir = debugfs_create_dir("ports", nsim_dev->ddir);
 312         if (IS_ERR(nsim_dev->ports_ddir))
 313                 return PTR_ERR(nsim_dev->ports_ddir);
 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("max_macs", 0600, nsim_dev->ddir,
 319                            &nsim_dev->max_macs);
 320         debugfs_create_bool("test1", 0600, nsim_dev->ddir,
 321                             &nsim_dev->test1);
 322         nsim_dev->take_snapshot = debugfs_create_file("take_snapshot",
 323                                                       0200,
 324                                                       nsim_dev->ddir,
 325                                                       nsim_dev,
 326                                                 &nsim_dev_take_snapshot_fops);
 327         debugfs_create_bool("dont_allow_reload", 0600, nsim_dev->ddir,
 328                             &nsim_dev->dont_allow_reload);
 329         debugfs_create_bool("fail_reload", 0600, nsim_dev->ddir,
 330                             &nsim_dev->fail_reload);
 331         debugfs_create_file("trap_flow_action_cookie", 0600, nsim_dev->ddir,
 332                             nsim_dev, &nsim_dev_trap_fa_cookie_fops);
 333         debugfs_create_bool("fail_trap_group_set", 0600,
 334                             nsim_dev->ddir,
 335                             &nsim_dev->fail_trap_group_set);
 336         debugfs_create_bool("fail_trap_policer_set", 0600,
 337                             nsim_dev->ddir,
 338                             &nsim_dev->fail_trap_policer_set);
 339         debugfs_create_bool("fail_trap_policer_counter_get", 0600,
 340                             nsim_dev->ddir,
 341                             &nsim_dev->fail_trap_policer_counter_get);
 342         /* caution, dev_max_vfs write takes devlink lock */
 343         debugfs_create_file("max_vfs", 0600, nsim_dev->ddir,
 344                             nsim_dev, &nsim_dev_max_vfs_fops);
 345
 346         nsim_dev->nodes_ddir = debugfs_create_dir("rate_nodes", nsim_dev->ddir);
 347         if (IS_ERR(nsim_dev->nodes_ddir)) {
 348                 err = PTR_ERR(nsim_dev->nodes_ddir);
 349                 goto err_out;
 350         }
 351         debugfs_create_bool("fail_trap_drop_counter_get", 0600,
 352                             nsim_dev->ddir,
 353                             &nsim_dev->fail_trap_drop_counter_get);
 354         nsim_udp_tunnels_debugfs_create(nsim_dev);
 355         return 0;
 356
 357 err_out:
 358         debugfs_remove_recursive(nsim_dev->ports_ddir);
 359         debugfs_remove_recursive(nsim_dev->ddir);
 360         return err;
 361 }
 362
 363 static void nsim_dev_debugfs_exit(struct nsim_dev *nsim_dev)
 364 {
 365         debugfs_remove_recursive(nsim_dev->nodes_ddir);
 366         debugfs_remove_recursive(nsim_dev->ports_ddir);
 367         debugfs_remove_recursive(nsim_dev->ddir);
 368 }
 369
 370 static ssize_t nsim_dev_rate_parent_read(struct file *file,
 371                                          char __user *data,
 372                                          size_t count, loff_t *ppos)
 373 {
 374         char **name_ptr = file->private_data;
 375         size_t len;
 376
 377         if (!*name_ptr)
 378                 return 0;
 379
 380         len = strlen(*name_ptr);
 381         return simple_read_from_buffer(data, count, ppos, *name_ptr, len);
 382 }
 383
 384 static const struct file_operations nsim_dev_rate_parent_fops = {
 385         .open = simple_open,
 386         .read = nsim_dev_rate_parent_read,
 387         .llseek = generic_file_llseek,
 388         .owner = THIS_MODULE,
 389 };
 390
 391 static int nsim_dev_port_debugfs_init(struct nsim_dev *nsim_dev,
 392                                       struct nsim_dev_port *nsim_dev_port)
 393 {
 394         struct nsim_bus_dev *nsim_bus_dev = nsim_dev->nsim_bus_dev;
 395         unsigned int port_index = nsim_dev_port->port_index;
 396         char port_ddir_name[16];
 397         char dev_link_name[32];
 398
 399         sprintf(port_ddir_name, "%u", port_index);
 400         nsim_dev_port->ddir = debugfs_create_dir(port_ddir_name,
 401                                                  nsim_dev->ports_ddir);
 402         if (IS_ERR(nsim_dev_port->ddir))
 403                 return PTR_ERR(nsim_dev_port->ddir);
 404
 405         sprintf(dev_link_name, "../../../" DRV_NAME "%u", nsim_bus_dev->dev.id);
 406         if (nsim_dev_port_is_vf(nsim_dev_port)) {
 407                 unsigned int vf_id = nsim_dev_port_index_to_vf_index(port_index);
 408
 409                 debugfs_create_u16("tx_share", 0400, nsim_dev_port->ddir,
 410                                    &nsim_dev->vfconfigs[vf_id].min_tx_rate);
 411                 debugfs_create_u16("tx_max", 0400, nsim_dev_port->ddir,
 412                                    &nsim_dev->vfconfigs[vf_id].max_tx_rate);
 413                 nsim_dev_port->rate_parent = debugfs_create_file("rate_parent",
 414                                                                  0400,
 415                                                                  nsim_dev_port->ddir,
 416                                                                  &nsim_dev_port->parent_name,
 417                                                                  &nsim_dev_rate_parent_fops);
 418         }
 419         debugfs_create_symlink("dev", nsim_dev_port->ddir, dev_link_name);
 420
 421         return 0;
 422 }
 423
 424 static void nsim_dev_port_debugfs_exit(struct nsim_dev_port *nsim_dev_port)
 425 {
 426         debugfs_remove_recursive(nsim_dev_port->ddir);
 427 }
 428
 429 static int nsim_dev_resources_register(struct devlink *devlink)
 430 {
 431         struct devlink_resource_size_params params = {
 432                 .size_max = (u64)-1,
 433                 .size_granularity = 1,
 434                 .unit = DEVLINK_RESOURCE_UNIT_ENTRY
 435         };
 436         int err;
 437
 438         /* Resources for IPv4 */
 439         err = devlink_resource_register(devlink, "IPv4", (u64)-1,
 440                                         NSIM_RESOURCE_IPV4,
 441                                         DEVLINK_RESOURCE_ID_PARENT_TOP,
 442                                         &params);
 443         if (err) {
 444                 pr_err("Failed to register IPv4 top resource\n");
 445                 goto out;
 446         }
 447
 448         err = devlink_resource_register(devlink, "fib", (u64)-1,
 449                                         NSIM_RESOURCE_IPV4_FIB,
 450                                         NSIM_RESOURCE_IPV4, &params);
 451         if (err) {
 452                 pr_err("Failed to register IPv4 FIB resource\n");
 453                 return err;
 454         }
 455
 456         err = devlink_resource_register(devlink, "fib-rules", (u64)-1,
 457                                         NSIM_RESOURCE_IPV4_FIB_RULES,
 458                                         NSIM_RESOURCE_IPV4, &params);
 459         if (err) {
 460                 pr_err("Failed to register IPv4 FIB rules resource\n");
 461                 return err;
 462         }
 463
 464         /* Resources for IPv6 */
 465         err = devlink_resource_register(devlink, "IPv6", (u64)-1,
 466                                         NSIM_RESOURCE_IPV6,
 467                                         DEVLINK_RESOURCE_ID_PARENT_TOP,
 468                                         &params);
 469         if (err) {
 470                 pr_err("Failed to register IPv6 top resource\n");
 471                 goto out;
 472         }
 473
 474         err = devlink_resource_register(devlink, "fib", (u64)-1,
 475                                         NSIM_RESOURCE_IPV6_FIB,
 476                                         NSIM_RESOURCE_IPV6, &params);
 477         if (err) {
 478                 pr_err("Failed to register IPv6 FIB resource\n");
 479                 return err;
 480         }
 481
 482         err = devlink_resource_register(devlink, "fib-rules", (u64)-1,
 483                                         NSIM_RESOURCE_IPV6_FIB_RULES,
 484                                         NSIM_RESOURCE_IPV6, &params);
 485         if (err) {
 486                 pr_err("Failed to register IPv6 FIB rules resource\n");
 487                 return err;
 488         }
 489
 490         /* Resources for nexthops */
 491         err = devlink_resource_register(devlink, "nexthops", (u64)-1,
 492                                         NSIM_RESOURCE_NEXTHOPS,
 493                                         DEVLINK_RESOURCE_ID_PARENT_TOP,
 494                                         &params);
 495
 496 out:
 497         return err;
 498 }
 499
 500 enum nsim_devlink_param_id {
 501         NSIM_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX,
 502         NSIM_DEVLINK_PARAM_ID_TEST1,
 503 };
 504
 505 static const struct devlink_param nsim_devlink_params[] = {
 506         DEVLINK_PARAM_GENERIC(MAX_MACS,
 507                               BIT(DEVLINK_PARAM_CMODE_DRIVERINIT),
 508                               NULL, NULL, NULL),
 509         DEVLINK_PARAM_DRIVER(NSIM_DEVLINK_PARAM_ID_TEST1,
 510                              "test1", DEVLINK_PARAM_TYPE_BOOL,
 511                              BIT(DEVLINK_PARAM_CMODE_DRIVERINIT),
 512                              NULL, NULL, NULL),
 513 };
 514
 515 static void nsim_devlink_set_params_init_values(struct nsim_dev *nsim_dev,
 516                                                 struct devlink *devlink)
 517 {
 518         union devlink_param_value value;
 519
 520         value.vu32 = nsim_dev->max_macs;
 521         devlink_param_driverinit_value_set(devlink,
 522                                            DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
 523                                            value);
 524         value.vbool = nsim_dev->test1;
 525         devlink_param_driverinit_value_set(devlink,
 526                                            NSIM_DEVLINK_PARAM_ID_TEST1,
 527                                            value);
 528 }
 529
 530 static void nsim_devlink_param_load_driverinit_values(struct devlink *devlink)
 531 {
 532         struct nsim_dev *nsim_dev = devlink_priv(devlink);
 533         union devlink_param_value saved_value;
 534         int err;
 535
 536         err = devlink_param_driverinit_value_get(devlink,
 537                                                  DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
 538                                                  &saved_value);
 539         if (!err)
 540                 nsim_dev->max_macs = saved_value.vu32;
 541         err = devlink_param_driverinit_value_get(devlink,
 542                                                  NSIM_DEVLINK_PARAM_ID_TEST1,
 543                                                  &saved_value);
 544         if (!err)
 545                 nsim_dev->test1 = saved_value.vbool;
 546 }
 547
 548 #define NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX 16
 549
 550 static const struct devlink_region_ops dummy_region_ops = {
 551         .name = "dummy",
 552         .destructor = &kfree,
 553         .snapshot = nsim_dev_take_snapshot,
 554 };
 555
 556 static int nsim_dev_dummy_region_init(struct nsim_dev *nsim_dev,
 557                                       struct devlink *devlink)
 558 {
 559         nsim_dev->dummy_region =
 560                 devlink_region_create(devlink, &dummy_region_ops,
 561                                       NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX,
 562                                       NSIM_DEV_DUMMY_REGION_SIZE);
 563         return PTR_ERR_OR_ZERO(nsim_dev->dummy_region);
 564 }
 565
 566 static void nsim_dev_dummy_region_exit(struct nsim_dev *nsim_dev)
 567 {
 568         devlink_region_destroy(nsim_dev->dummy_region);
 569 }
 570
 571 static int
 572 __nsim_dev_port_add(struct nsim_dev *nsim_dev, enum nsim_dev_port_type type,
 573                     unsigned int port_index);
 574 static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port);
 575
 576 static int nsim_esw_legacy_enable(struct nsim_dev *nsim_dev,
 577                                   struct netlink_ext_ack *extack)
 578 {
 579         struct devlink *devlink = priv_to_devlink(nsim_dev);
 580         struct nsim_dev_port *nsim_dev_port, *tmp;
 581
 582         devl_rate_nodes_destroy(devlink);
 583         list_for_each_entry_safe(nsim_dev_port, tmp, &nsim_dev->port_list, list)
 584                 if (nsim_dev_port_is_vf(nsim_dev_port))
 585                         __nsim_dev_port_del(nsim_dev_port);
 586         nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_LEGACY;
 587         return 0;
 588 }
 589
 590 static int nsim_esw_switchdev_enable(struct nsim_dev *nsim_dev,
 591                                      struct netlink_ext_ack *extack)
 592 {
 593         struct nsim_dev_port *nsim_dev_port, *tmp;
 594         int i, err;
 595
 596         for (i = 0; i < nsim_dev_get_vfs(nsim_dev); i++) {
 597                 err = __nsim_dev_port_add(nsim_dev, NSIM_DEV_PORT_TYPE_VF, i);
 598                 if (err) {
 599                         NL_SET_ERR_MSG_MOD(extack, "Failed to initialize VFs' netdevsim ports");
 600                         pr_err("Failed to initialize VF id=%d. %d.\n", i, err);
 601                         goto err_port_add_vfs;
 602                 }
 603         }
 604         nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_SWITCHDEV;
 605         return 0;
 606
 607 err_port_add_vfs:
 608         list_for_each_entry_safe(nsim_dev_port, tmp, &nsim_dev->port_list, list)
 609                 if (nsim_dev_port_is_vf(nsim_dev_port))
 610                         __nsim_dev_port_del(nsim_dev_port);
 611         return err;
 612 }
 613
 614 static int nsim_devlink_eswitch_mode_set(struct devlink *devlink, u16 mode,
 615                                          struct netlink_ext_ack *extack)
 616 {
 617         struct nsim_dev *nsim_dev = devlink_priv(devlink);
 618
 619         if (mode == nsim_dev->esw_mode)
 620                 return 0;
 621
 622         if (mode == DEVLINK_ESWITCH_MODE_LEGACY)
 623                 return nsim_esw_legacy_enable(nsim_dev, extack);
 624         if (mode == DEVLINK_ESWITCH_MODE_SWITCHDEV)
 625                 return nsim_esw_switchdev_enable(nsim_dev, extack);
 626
 627         return -EINVAL;
 628 }
 629
 630 static int nsim_devlink_eswitch_mode_get(struct devlink *devlink, u16 *mode)
 631 {
 632         struct nsim_dev *nsim_dev = devlink_priv(devlink);
 633
 634         *mode = nsim_dev->esw_mode;
 635         return 0;
 636 }
 637
 638 struct nsim_trap_item {
 639         void *trap_ctx;
 640         enum devlink_trap_action action;
 641 };
 642
 643 struct nsim_trap_data {
 644         struct delayed_work trap_report_dw;
 645         struct nsim_trap_item *trap_items_arr;
 646         u64 *trap_policers_cnt_arr;
 647         u64 trap_pkt_cnt;
 648         struct nsim_dev *nsim_dev;
 649         spinlock_t trap_lock;   /* Protects trap_items_arr */
 650 };
 651
 652 /* All driver-specific traps must be documented in
 653  * Documentation/networking/devlink/netdevsim.rst
 654  */
 655 enum {
 656         NSIM_TRAP_ID_BASE = DEVLINK_TRAP_GENERIC_ID_MAX,
 657         NSIM_TRAP_ID_FID_MISS,
 658 };
 659
 660 #define NSIM_TRAP_NAME_FID_MISS "fid_miss"
 661
 662 #define NSIM_TRAP_METADATA DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT
 663
 664 #define NSIM_TRAP_DROP(_id, _group_id)                                        \
 665         DEVLINK_TRAP_GENERIC(DROP, DROP, _id,                                 \
 666                              DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id,       \
 667                              NSIM_TRAP_METADATA)
 668 #define NSIM_TRAP_DROP_EXT(_id, _group_id, _metadata)                         \
 669         DEVLINK_TRAP_GENERIC(DROP, DROP, _id,                                 \
 670                              DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id,       \
 671                              NSIM_TRAP_METADATA | (_metadata))
 672 #define NSIM_TRAP_EXCEPTION(_id, _group_id)                                   \
 673         DEVLINK_TRAP_GENERIC(EXCEPTION, TRAP, _id,                            \
 674                              DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id,       \
 675                              NSIM_TRAP_METADATA)
 676 #define NSIM_TRAP_CONTROL(_id, _group_id, _action)                            \
 677         DEVLINK_TRAP_GENERIC(CONTROL, _action, _id,                           \
 678                              DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id,       \
 679                              NSIM_TRAP_METADATA)
 680 #define NSIM_TRAP_DRIVER_EXCEPTION(_id, _group_id)                            \
 681         DEVLINK_TRAP_DRIVER(EXCEPTION, TRAP, NSIM_TRAP_ID_##_id,              \
 682                             NSIM_TRAP_NAME_##_id,                             \
 683                             DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id,        \
 684                             NSIM_TRAP_METADATA)
 685
 686 #define NSIM_DEV_TRAP_POLICER_MIN_RATE  1
 687 #define NSIM_DEV_TRAP_POLICER_MAX_RATE  8000
 688 #define NSIM_DEV_TRAP_POLICER_MIN_BURST 8
 689 #define NSIM_DEV_TRAP_POLICER_MAX_BURST 65536
 690
 691 #define NSIM_TRAP_POLICER(_id, _rate, _burst)                                 \
 692         DEVLINK_TRAP_POLICER(_id, _rate, _burst,                              \
 693                              NSIM_DEV_TRAP_POLICER_MAX_RATE,                  \
 694                              NSIM_DEV_TRAP_POLICER_MIN_RATE,                  \
 695                              NSIM_DEV_TRAP_POLICER_MAX_BURST,                 \
 696                              NSIM_DEV_TRAP_POLICER_MIN_BURST)
 697
 698 static const struct devlink_trap_policer nsim_trap_policers_arr[] = {
 699         NSIM_TRAP_POLICER(1, 1000, 128),
 700         NSIM_TRAP_POLICER(2, 2000, 256),
 701         NSIM_TRAP_POLICER(3, 3000, 512),
 702 };
 703
 704 static const struct devlink_trap_group nsim_trap_groups_arr[] = {
 705         DEVLINK_TRAP_GROUP_GENERIC(L2_DROPS, 0),
 706         DEVLINK_TRAP_GROUP_GENERIC(L3_DROPS, 1),
 707         DEVLINK_TRAP_GROUP_GENERIC(L3_EXCEPTIONS, 1),
 708         DEVLINK_TRAP_GROUP_GENERIC(BUFFER_DROPS, 2),
 709         DEVLINK_TRAP_GROUP_GENERIC(ACL_DROPS, 3),
 710         DEVLINK_TRAP_GROUP_GENERIC(MC_SNOOPING, 3),
 711 };
 712
 713 static const struct devlink_trap nsim_traps_arr[] = {
 714         NSIM_TRAP_DROP(SMAC_MC, L2_DROPS),
 715         NSIM_TRAP_DROP(VLAN_TAG_MISMATCH, L2_DROPS),
 716         NSIM_TRAP_DROP(INGRESS_VLAN_FILTER, L2_DROPS),
 717         NSIM_TRAP_DROP(INGRESS_STP_FILTER, L2_DROPS),
 718         NSIM_TRAP_DROP(EMPTY_TX_LIST, L2_DROPS),
 719         NSIM_TRAP_DROP(PORT_LOOPBACK_FILTER, L2_DROPS),
 720         NSIM_TRAP_DRIVER_EXCEPTION(FID_MISS, L2_DROPS),
 721         NSIM_TRAP_DROP(BLACKHOLE_ROUTE, L3_DROPS),
 722         NSIM_TRAP_EXCEPTION(TTL_ERROR, L3_EXCEPTIONS),
 723         NSIM_TRAP_DROP(TAIL_DROP, BUFFER_DROPS),
 724         NSIM_TRAP_DROP_EXT(INGRESS_FLOW_ACTION_DROP, ACL_DROPS,
 725                            DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE),
 726         NSIM_TRAP_DROP_EXT(EGRESS_FLOW_ACTION_DROP, ACL_DROPS,
 727                            DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE),
 728         NSIM_TRAP_CONTROL(IGMP_QUERY, MC_SNOOPING, MIRROR),
 729         NSIM_TRAP_CONTROL(IGMP_V1_REPORT, MC_SNOOPING, TRAP),
 730 };
 731
 732 #define NSIM_TRAP_L4_DATA_LEN 100
 733
 734 static struct sk_buff *nsim_dev_trap_skb_build(void)
 735 {
 736         int tot_len, data_len = NSIM_TRAP_L4_DATA_LEN;
 737         struct sk_buff *skb;
 738         struct udphdr *udph;
 739         struct ethhdr *eth;
 740         struct iphdr *iph;
 741
 742         skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
 743         if (!skb)
 744                 return NULL;
 745         tot_len = sizeof(struct iphdr) + sizeof(struct udphdr) + data_len;
 746
 747         skb_reset_mac_header(skb);
 748         eth = skb_put(skb, sizeof(struct ethhdr));
 749         eth_random_addr(eth->h_dest);
 750         eth_random_addr(eth->h_source);
 751         eth->h_proto = htons(ETH_P_IP);
 752         skb->protocol = htons(ETH_P_IP);
 753
 754         skb_set_network_header(skb, skb->len);
 755         iph = skb_put(skb, sizeof(struct iphdr));
 756         iph->protocol = IPPROTO_UDP;
 757         iph->saddr = in_aton("192.0.2.1");
 758         iph->daddr = in_aton("198.51.100.1");
 759         iph->version = 0x4;
 760         iph->frag_off = 0;
 761         iph->ihl = 0x5;
 762         iph->tot_len = htons(tot_len);
 763         iph->ttl = 100;
 764         iph->check = 0;
 765         iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
 766
 767         skb_set_transport_header(skb, skb->len);
 768         udph = skb_put_zero(skb, sizeof(struct udphdr) + data_len);
 769         get_random_bytes(&udph->source, sizeof(u16));
 770         get_random_bytes(&udph->dest, sizeof(u16));
 771         udph->len = htons(sizeof(struct udphdr) + data_len);
 772
 773         return skb;
 774 }
 775
 776 static void nsim_dev_trap_report(struct nsim_dev_port *nsim_dev_port)
 777 {
 778         struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev;
 779         struct devlink *devlink = priv_to_devlink(nsim_dev);
 780         struct nsim_trap_data *nsim_trap_data;
 781         int i;
 782
 783         nsim_trap_data = nsim_dev->trap_data;
 784
 785         spin_lock(&nsim_trap_data->trap_lock);
 786         for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) {
 787                 struct flow_action_cookie *fa_cookie = NULL;
 788                 struct nsim_trap_item *nsim_trap_item;
 789                 struct sk_buff *skb;
 790                 bool has_fa_cookie;
 791
 792                 has_fa_cookie = nsim_traps_arr[i].metadata_cap &
 793                                 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE;
 794
 795                 nsim_trap_item = &nsim_trap_data->trap_items_arr[i];
 796                 if (nsim_trap_item->action == DEVLINK_TRAP_ACTION_DROP)
 797                         continue;
 798
 799                 skb = nsim_dev_trap_skb_build();
 800                 if (!skb)
 801                         continue;
 802                 skb->dev = nsim_dev_port->ns->netdev;
 803
 804                 /* Trapped packets are usually passed to devlink in softIRQ,
 805                  * but in this case they are generated in a workqueue. Disable
 806                  * softIRQs to prevent lockdep from complaining about
 807                  * "incosistent lock state".
 808                  */
 809
 810                 spin_lock_bh(&nsim_dev->fa_cookie_lock);
 811                 fa_cookie = has_fa_cookie ? nsim_dev->fa_cookie : NULL;
 812                 devlink_trap_report(devlink, skb, nsim_trap_item->trap_ctx,
 813                                     &nsim_dev_port->devlink_port, fa_cookie);
 814                 spin_unlock_bh(&nsim_dev->fa_cookie_lock);
 815                 consume_skb(skb);
 816         }
 817         spin_unlock(&nsim_trap_data->trap_lock);
 818 }
 819
 820 #define NSIM_TRAP_REPORT_INTERVAL_MS    100
 821
 822 static void nsim_dev_trap_report_work(struct work_struct *work)
 823 {
 824         struct nsim_trap_data *nsim_trap_data;
 825         struct nsim_dev_port *nsim_dev_port;
 826         struct nsim_dev *nsim_dev;
 827
 828         nsim_trap_data = container_of(work, struct nsim_trap_data,
 829                                       trap_report_dw.work);
 830         nsim_dev = nsim_trap_data->nsim_dev;
 831
 832         /* For each running port and enabled packet trap, generate a UDP
 833          * packet with a random 5-tuple and report it.
 834          */
 835         devl_lock(priv_to_devlink(nsim_dev));
 836         list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list) {
 837                 if (!netif_running(nsim_dev_port->ns->netdev))
 838                         continue;
 839
 840                 nsim_dev_trap_report(nsim_dev_port);
 841         }
 842         devl_unlock(priv_to_devlink(nsim_dev));
 843
 844         schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw,
 845                               msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS));
 846 }
 847
 848 static int nsim_dev_traps_init(struct devlink *devlink)
 849 {
 850         size_t policers_count = ARRAY_SIZE(nsim_trap_policers_arr);
 851         struct nsim_dev *nsim_dev = devlink_priv(devlink);
 852         struct nsim_trap_data *nsim_trap_data;
 853         int err;
 854
 855         nsim_trap_data = kzalloc(sizeof(*nsim_trap_data), GFP_KERNEL);
 856         if (!nsim_trap_data)
 857                 return -ENOMEM;
 858
 859         nsim_trap_data->trap_items_arr = kcalloc(ARRAY_SIZE(nsim_traps_arr),
 860                                                  sizeof(struct nsim_trap_item),
 861                                                  GFP_KERNEL);
 862         if (!nsim_trap_data->trap_items_arr) {
 863                 err = -ENOMEM;
 864                 goto err_trap_data_free;
 865         }
 866
 867         nsim_trap_data->trap_policers_cnt_arr = kcalloc(policers_count,
 868                                                         sizeof(u64),
 869                                                         GFP_KERNEL);
 870         if (!nsim_trap_data->trap_policers_cnt_arr) {
 871                 err = -ENOMEM;
 872                 goto err_trap_items_free;
 873         }
 874
 875         /* The lock is used to protect the action state of the registered
 876          * traps. The value is written by user and read in delayed work when
 877          * iterating over all the traps.
 878          */
 879         spin_lock_init(&nsim_trap_data->trap_lock);
 880         nsim_trap_data->nsim_dev = nsim_dev;
 881         nsim_dev->trap_data = nsim_trap_data;
 882
 883         err = devlink_trap_policers_register(devlink, nsim_trap_policers_arr,
 884                                              policers_count);
 885         if (err)
 886                 goto err_trap_policers_cnt_free;
 887
 888         err = devlink_trap_groups_register(devlink, nsim_trap_groups_arr,
 889                                            ARRAY_SIZE(nsim_trap_groups_arr));
 890         if (err)
 891                 goto err_trap_policers_unregister;
 892
 893         err = devlink_traps_register(devlink, nsim_traps_arr,
 894                                      ARRAY_SIZE(nsim_traps_arr), NULL);
 895         if (err)
 896                 goto err_trap_groups_unregister;
 897
 898         INIT_DELAYED_WORK(&nsim_dev->trap_data->trap_report_dw,
 899                           nsim_dev_trap_report_work);
 900         schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw,
 901                               msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS));
 902
 903         return 0;
 904
 905 err_trap_groups_unregister:
 906         devlink_trap_groups_unregister(devlink, nsim_trap_groups_arr,
 907                                        ARRAY_SIZE(nsim_trap_groups_arr));
 908 err_trap_policers_unregister:
 909         devlink_trap_policers_unregister(devlink, nsim_trap_policers_arr,
 910                                          ARRAY_SIZE(nsim_trap_policers_arr));
 911 err_trap_policers_cnt_free:
 912         kfree(nsim_trap_data->trap_policers_cnt_arr);
 913 err_trap_items_free:
 914         kfree(nsim_trap_data->trap_items_arr);
 915 err_trap_data_free:
 916         kfree(nsim_trap_data);
 917         return err;
 918 }
 919
 920 static void nsim_dev_traps_exit(struct devlink *devlink)
 921 {
 922         struct nsim_dev *nsim_dev = devlink_priv(devlink);
 923
 924         /* caution, trap work takes devlink lock */
 925         cancel_delayed_work_sync(&nsim_dev->trap_data->trap_report_dw);
 926         devlink_traps_unregister(devlink, nsim_traps_arr,
 927                                  ARRAY_SIZE(nsim_traps_arr));
 928         devlink_trap_groups_unregister(devlink, nsim_trap_groups_arr,
 929                                        ARRAY_SIZE(nsim_trap_groups_arr));
 930         devlink_trap_policers_unregister(devlink, nsim_trap_policers_arr,
 931                                          ARRAY_SIZE(nsim_trap_policers_arr));
 932         kfree(nsim_dev->trap_data->trap_policers_cnt_arr);
 933         kfree(nsim_dev->trap_data->trap_items_arr);
 934         kfree(nsim_dev->trap_data);
 935 }
 936
 937 static int nsim_dev_reload_create(struct nsim_dev *nsim_dev,
 938                                   struct netlink_ext_ack *extack);
 939 static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev);
 940
 941 static int nsim_dev_reload_down(struct devlink *devlink, bool netns_change,
 942                                 enum devlink_reload_action action, enum devlink_reload_limit limit,
 943                                 struct netlink_ext_ack *extack)
 944 {
 945         struct nsim_dev *nsim_dev = devlink_priv(devlink);
 946         struct nsim_bus_dev *nsim_bus_dev;
 947
 948         nsim_bus_dev = nsim_dev->nsim_bus_dev;
 949         if (!mutex_trylock(&nsim_bus_dev->nsim_bus_reload_lock))
 950                 return -EOPNOTSUPP;
 951
 952         if (nsim_dev->dont_allow_reload) {
 953                 /* For testing purposes, user set debugfs dont_allow_reload
 954                  * value to true. So forbid it.
 955                  */
 956                 NL_SET_ERR_MSG_MOD(extack, "User forbid the reload for testing purposes");
 957                 mutex_unlock(&nsim_bus_dev->nsim_bus_reload_lock);
 958                 return -EOPNOTSUPP;
 959         }
 960         nsim_bus_dev->in_reload = true;
 961
 962         nsim_dev_reload_destroy(nsim_dev);
 963         mutex_unlock(&nsim_bus_dev->nsim_bus_reload_lock);
 964         return 0;
 965 }
 966
 967 static int nsim_dev_reload_up(struct devlink *devlink, enum devlink_reload_action action,
 968                               enum devlink_reload_limit limit, u32 *actions_performed,
 969                               struct netlink_ext_ack *extack)
 970 {
 971         struct nsim_dev *nsim_dev = devlink_priv(devlink);
 972         struct nsim_bus_dev *nsim_bus_dev;
 973         int ret;
 974
 975         nsim_bus_dev = nsim_dev->nsim_bus_dev;
 976         mutex_lock(&nsim_bus_dev->nsim_bus_reload_lock);
 977         nsim_bus_dev->in_reload = false;
 978
 979         if (nsim_dev->fail_reload) {
 980                 /* For testing purposes, user set debugfs fail_reload
 981                  * value to true. Fail right away.
 982                  */
 983                 NL_SET_ERR_MSG_MOD(extack, "User setup the reload to fail for testing purposes");
 984                 mutex_unlock(&nsim_bus_dev->nsim_bus_reload_lock);
 985                 return -EINVAL;
 986         }
 987
 988         *actions_performed = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT);
 989         ret = nsim_dev_reload_create(nsim_dev, extack);
 990         mutex_unlock(&nsim_bus_dev->nsim_bus_reload_lock);
 991         return ret;
 992 }
 993
 994 static int nsim_dev_info_get(struct devlink *devlink,
 995                              struct devlink_info_req *req,
 996                              struct netlink_ext_ack *extack)
 997 {
 998         return devlink_info_driver_name_put(req, DRV_NAME);
 999 }
1000
1001 #define NSIM_DEV_FLASH_SIZE 500000
1002 #define NSIM_DEV_FLASH_CHUNK_SIZE 1000
1003 #define NSIM_DEV_FLASH_CHUNK_TIME_MS 10
1004
1005 static int nsim_dev_flash_update(struct devlink *devlink,
1006                                  struct devlink_flash_update_params *params,
1007                                  struct netlink_ext_ack *extack)
1008 {
1009         struct nsim_dev *nsim_dev = devlink_priv(devlink);
1010         int i;
1011
1012         if ((params->overwrite_mask & ~nsim_dev->fw_update_overwrite_mask) != 0)
1013                 return -EOPNOTSUPP;
1014
1015         if (nsim_dev->fw_update_status) {
1016                 devlink_flash_update_status_notify(devlink,
1017                                                    "Preparing to flash",
1018                                                    params->component, 0, 0);
1019         }
1020
1021         for (i = 0; i < NSIM_DEV_FLASH_SIZE / NSIM_DEV_FLASH_CHUNK_SIZE; i++) {
1022                 if (nsim_dev->fw_update_status)
1023                         devlink_flash_update_status_notify(devlink, "Flashing",
1024                                                            params->component,
1025                                                            i * NSIM_DEV_FLASH_CHUNK_SIZE,
1026                                                            NSIM_DEV_FLASH_SIZE);
1027                 msleep(NSIM_DEV_FLASH_CHUNK_TIME_MS);
1028         }
1029
1030         if (nsim_dev->fw_update_status) {
1031                 devlink_flash_update_status_notify(devlink, "Flashing",
1032                                                    params->component,
1033                                                    NSIM_DEV_FLASH_SIZE,
1034                                                    NSIM_DEV_FLASH_SIZE);
1035                 devlink_flash_update_timeout_notify(devlink, "Flash select",
1036                                                     params->component, 81);
1037                 devlink_flash_update_status_notify(devlink, "Flashing done",
1038                                                    params->component, 0, 0);
1039         }
1040
1041         return 0;
1042 }
1043
1044 static struct nsim_trap_item *
1045 nsim_dev_trap_item_lookup(struct nsim_dev *nsim_dev, u16 trap_id)
1046 {
1047         struct nsim_trap_data *nsim_trap_data = nsim_dev->trap_data;
1048         int i;
1049
1050         for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) {
1051                 if (nsim_traps_arr[i].id == trap_id)
1052                         return &nsim_trap_data->trap_items_arr[i];
1053         }
1054
1055         return NULL;
1056 }
1057
1058 static int nsim_dev_devlink_trap_init(struct devlink *devlink,
1059                                       const struct devlink_trap *trap,
1060                                       void *trap_ctx)
1061 {
1062         struct nsim_dev *nsim_dev = devlink_priv(devlink);
1063         struct nsim_trap_item *nsim_trap_item;
1064
1065         nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id);
1066         if (WARN_ON(!nsim_trap_item))
1067                 return -ENOENT;
1068
1069         nsim_trap_item->trap_ctx = trap_ctx;
1070         nsim_trap_item->action = trap->init_action;
1071
1072         return 0;
1073 }
1074
1075 static int
1076 nsim_dev_devlink_trap_action_set(struct devlink *devlink,
1077                                  const struct devlink_trap *trap,
1078                                  enum devlink_trap_action action,
1079                                  struct netlink_ext_ack *extack)
1080 {
1081         struct nsim_dev *nsim_dev = devlink_priv(devlink);
1082         struct nsim_trap_item *nsim_trap_item;
1083
1084         nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id);
1085         if (WARN_ON(!nsim_trap_item))
1086                 return -ENOENT;
1087
1088         spin_lock(&nsim_dev->trap_data->trap_lock);
1089         nsim_trap_item->action = action;
1090         spin_unlock(&nsim_dev->trap_data->trap_lock);
1091
1092         return 0;
1093 }
1094
1095 static int
1096 nsim_dev_devlink_trap_group_set(struct devlink *devlink,
1097                                 const struct devlink_trap_group *group,
1098                                 const struct devlink_trap_policer *policer,
1099                                 struct netlink_ext_ack *extack)
1100 {
1101         struct nsim_dev *nsim_dev = devlink_priv(devlink);
1102
1103         if (nsim_dev->fail_trap_group_set)
1104                 return -EINVAL;
1105
1106         return 0;
1107 }
1108
1109 static int
1110 nsim_dev_devlink_trap_policer_set(struct devlink *devlink,
1111                                   const struct devlink_trap_policer *policer,
1112                                   u64 rate, u64 burst,
1113                                   struct netlink_ext_ack *extack)
1114 {
1115         struct nsim_dev *nsim_dev = devlink_priv(devlink);
1116
1117         if (nsim_dev->fail_trap_policer_set) {
1118                 NL_SET_ERR_MSG_MOD(extack, "User setup the operation to fail for testing purposes");
1119                 return -EINVAL;
1120         }
1121
1122         return 0;
1123 }
1124
1125 static int
1126 nsim_dev_devlink_trap_policer_counter_get(struct devlink *devlink,
1127                                           const struct devlink_trap_policer *policer,
1128                                           u64 *p_drops)
1129 {
1130         struct nsim_dev *nsim_dev = devlink_priv(devlink);
1131         u64 *cnt;
1132
1133         if (nsim_dev->fail_trap_policer_counter_get)
1134                 return -EINVAL;
1135
1136         cnt = &nsim_dev->trap_data->trap_policers_cnt_arr[policer->id - 1];
1137         *p_drops = (*cnt)++;
1138
1139         return 0;
1140 }
1141
1142 #define NSIM_LINK_SPEED_MAX     5000 /* Mbps */
1143 #define NSIM_LINK_SPEED_UNIT    125000 /* 1 Mbps given in bytes/sec to avoid
1144                                         * u64 overflow during conversion from
1145                                         * bytes to bits.
1146                                         */
1147
1148 static int nsim_rate_bytes_to_units(char *name, u64 *rate, struct netlink_ext_ack *extack)
1149 {
1150         u64 val;
1151         u32 rem;
1152
1153         val = div_u64_rem(*rate, NSIM_LINK_SPEED_UNIT, &rem);
1154         if (rem) {
1155                 pr_err("%s rate value %lluBps not in link speed units of 1Mbps.\n",
1156                        name, *rate);
1157                 NL_SET_ERR_MSG_MOD(extack, "TX rate value not in link speed units of 1Mbps.");
1158                 return -EINVAL;
1159         }
1160
1161         if (val > NSIM_LINK_SPEED_MAX) {
1162                 pr_err("%s rate value %lluMbps exceed link maximum speed 5000Mbps.\n",
1163                        name, val);
1164                 NL_SET_ERR_MSG_MOD(extack, "TX rate value exceed link maximum speed 5000Mbps.");
1165                 return -EINVAL;
1166         }
1167         *rate = val;
1168         return 0;
1169 }
1170
1171 static int nsim_leaf_tx_share_set(struct devlink_rate *devlink_rate, void *priv,
1172                                   u64 tx_share, struct netlink_ext_ack *extack)
1173 {
1174         struct nsim_dev_port *nsim_dev_port = priv;
1175         struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev;
1176         int vf_id = nsim_dev_port_index_to_vf_index(nsim_dev_port->port_index);
1177         int err;
1178
1179         err = nsim_rate_bytes_to_units("tx_share", &tx_share, extack);
1180         if (err)
1181                 return err;
1182
1183         nsim_dev->vfconfigs[vf_id].min_tx_rate = tx_share;
1184         return 0;
1185 }
1186
1187 static int nsim_leaf_tx_max_set(struct devlink_rate *devlink_rate, void *priv,
1188                                 u64 tx_max, struct netlink_ext_ack *extack)
1189 {
1190         struct nsim_dev_port *nsim_dev_port = priv;
1191         struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev;
1192         int vf_id = nsim_dev_port_index_to_vf_index(nsim_dev_port->port_index);
1193         int err;
1194
1195         err = nsim_rate_bytes_to_units("tx_max", &tx_max, extack);
1196         if (err)
1197                 return err;
1198
1199         nsim_dev->vfconfigs[vf_id].max_tx_rate = tx_max;
1200         return 0;
1201 }
1202
1203 struct nsim_rate_node {
1204         struct dentry *ddir;
1205         struct dentry *rate_parent;
1206         char *parent_name;
1207         u16 tx_share;
1208         u16 tx_max;
1209 };
1210
1211 static int nsim_node_tx_share_set(struct devlink_rate *devlink_rate, void *priv,
1212                                   u64 tx_share, struct netlink_ext_ack *extack)
1213 {
1214         struct nsim_rate_node *nsim_node = priv;
1215         int err;
1216
1217         err = nsim_rate_bytes_to_units("tx_share", &tx_share, extack);
1218         if (err)
1219                 return err;
1220
1221         nsim_node->tx_share = tx_share;
1222         return 0;
1223 }
1224
1225 static int nsim_node_tx_max_set(struct devlink_rate *devlink_rate, void *priv,
1226                                 u64 tx_max, struct netlink_ext_ack *extack)
1227 {
1228         struct nsim_rate_node *nsim_node = priv;
1229         int err;
1230
1231         err = nsim_rate_bytes_to_units("tx_max", &tx_max, extack);
1232         if (err)
1233                 return err;
1234
1235         nsim_node->tx_max = tx_max;
1236         return 0;
1237 }
1238
1239 static int nsim_rate_node_new(struct devlink_rate *node, void **priv,
1240                               struct netlink_ext_ack *extack)
1241 {
1242         struct nsim_dev *nsim_dev = devlink_priv(node->devlink);
1243         struct nsim_rate_node *nsim_node;
1244
1245         if (!nsim_esw_mode_is_switchdev(nsim_dev)) {
1246                 NL_SET_ERR_MSG_MOD(extack, "Node creation allowed only in switchdev mode.");
1247                 return -EOPNOTSUPP;
1248         }
1249
1250         nsim_node = kzalloc(sizeof(*nsim_node), GFP_KERNEL);
1251         if (!nsim_node)
1252                 return -ENOMEM;
1253
1254         nsim_node->ddir = debugfs_create_dir(node->name, nsim_dev->nodes_ddir);
1255
1256         debugfs_create_u16("tx_share", 0400, nsim_node->ddir, &nsim_node->tx_share);
1257         debugfs_create_u16("tx_max", 0400, nsim_node->ddir, &nsim_node->tx_max);
1258         nsim_node->rate_parent = debugfs_create_file("rate_parent", 0400,
1259                                                      nsim_node->ddir,
1260                                                      &nsim_node->parent_name,
1261                                                      &nsim_dev_rate_parent_fops);
1262
1263         *priv = nsim_node;
1264         return 0;
1265 }
1266
1267 static int nsim_rate_node_del(struct devlink_rate *node, void *priv,
1268                               struct netlink_ext_ack *extack)
1269 {
1270         struct nsim_rate_node *nsim_node = priv;
1271
1272         debugfs_remove(nsim_node->rate_parent);
1273         debugfs_remove_recursive(nsim_node->ddir);
1274         kfree(nsim_node);
1275         return 0;
1276 }
1277
1278 static int nsim_rate_leaf_parent_set(struct devlink_rate *child,
1279                                      struct devlink_rate *parent,
1280                                      void *priv_child, void *priv_parent,
1281                                      struct netlink_ext_ack *extack)
1282 {
1283         struct nsim_dev_port *nsim_dev_port = priv_child;
1284
1285         if (parent)
1286                 nsim_dev_port->parent_name = parent->name;
1287         else
1288                 nsim_dev_port->parent_name = NULL;
1289         return 0;
1290 }
1291
1292 static int nsim_rate_node_parent_set(struct devlink_rate *child,
1293                                      struct devlink_rate *parent,
1294                                      void *priv_child, void *priv_parent,
1295                                      struct netlink_ext_ack *extack)
1296 {
1297         struct nsim_rate_node *nsim_node = priv_child;
1298
1299         if (parent)
1300                 nsim_node->parent_name = parent->name;
1301         else
1302                 nsim_node->parent_name = NULL;
1303         return 0;
1304 }
1305
1306 static int
1307 nsim_dev_devlink_trap_drop_counter_get(struct devlink *devlink,
1308                                        const struct devlink_trap *trap,
1309                                        u64 *p_drops)
1310 {
1311         struct nsim_dev *nsim_dev = devlink_priv(devlink);
1312         u64 *cnt;
1313
1314         if (nsim_dev->fail_trap_drop_counter_get)
1315                 return -EINVAL;
1316
1317         cnt = &nsim_dev->trap_data->trap_pkt_cnt;
1318         *p_drops = (*cnt)++;
1319
1320         return 0;
1321 }
1322
1323 static const struct devlink_ops nsim_dev_devlink_ops = {
1324         .eswitch_mode_set = nsim_devlink_eswitch_mode_set,
1325         .eswitch_mode_get = nsim_devlink_eswitch_mode_get,
1326         .supported_flash_update_params = DEVLINK_SUPPORT_FLASH_UPDATE_COMPONENT |
1327                                          DEVLINK_SUPPORT_FLASH_UPDATE_OVERWRITE_MASK,
1328         .reload_actions = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT),
1329         .reload_down = nsim_dev_reload_down,
1330         .reload_up = nsim_dev_reload_up,
1331         .info_get = nsim_dev_info_get,
1332         .flash_update = nsim_dev_flash_update,
1333         .trap_init = nsim_dev_devlink_trap_init,
1334         .trap_action_set = nsim_dev_devlink_trap_action_set,
1335         .trap_group_set = nsim_dev_devlink_trap_group_set,
1336         .trap_policer_set = nsim_dev_devlink_trap_policer_set,
1337         .trap_policer_counter_get = nsim_dev_devlink_trap_policer_counter_get,
1338         .rate_leaf_tx_share_set = nsim_leaf_tx_share_set,
1339         .rate_leaf_tx_max_set = nsim_leaf_tx_max_set,
1340         .rate_node_tx_share_set = nsim_node_tx_share_set,
1341         .rate_node_tx_max_set = nsim_node_tx_max_set,
1342         .rate_node_new = nsim_rate_node_new,
1343         .rate_node_del = nsim_rate_node_del,
1344         .rate_leaf_parent_set = nsim_rate_leaf_parent_set,
1345         .rate_node_parent_set = nsim_rate_node_parent_set,
1346         .trap_drop_counter_get = nsim_dev_devlink_trap_drop_counter_get,
1347 };
1348
1349 #define NSIM_DEV_MAX_MACS_DEFAULT 32
1350 #define NSIM_DEV_TEST1_DEFAULT true
1351
1352 static int __nsim_dev_port_add(struct nsim_dev *nsim_dev, enum nsim_dev_port_type type,
1353                                unsigned int port_index)
1354 {
1355         struct devlink_port_attrs attrs = {};
1356         struct nsim_dev_port *nsim_dev_port;
1357         struct devlink_port *devlink_port;
1358         int err;
1359
1360         if (type == NSIM_DEV_PORT_TYPE_VF && !nsim_dev_get_vfs(nsim_dev))
1361                 return -EINVAL;
1362
1363         nsim_dev_port = kzalloc(sizeof(*nsim_dev_port), GFP_KERNEL);
1364         if (!nsim_dev_port)
1365                 return -ENOMEM;
1366         nsim_dev_port->port_index = nsim_dev_port_index(type, port_index);
1367         nsim_dev_port->port_type = type;
1368
1369         devlink_port = &nsim_dev_port->devlink_port;
1370         if (nsim_dev_port_is_pf(nsim_dev_port)) {
1371                 attrs.flavour = DEVLINK_PORT_FLAVOUR_PHYSICAL;
1372                 attrs.phys.port_number = port_index + 1;
1373         } else {
1374                 attrs.flavour = DEVLINK_PORT_FLAVOUR_PCI_VF;
1375                 attrs.pci_vf.pf = 0;
1376                 attrs.pci_vf.vf = port_index;
1377         }
1378         memcpy(attrs.switch_id.id, nsim_dev->switch_id.id, nsim_dev->switch_id.id_len);
1379         attrs.switch_id.id_len = nsim_dev->switch_id.id_len;
1380         devlink_port_attrs_set(devlink_port, &attrs);
1381         err = devl_port_register(priv_to_devlink(nsim_dev), devlink_port,
1382                                  nsim_dev_port->port_index);
1383         if (err)
1384                 goto err_port_free;
1385
1386         err = nsim_dev_port_debugfs_init(nsim_dev, nsim_dev_port);
1387         if (err)
1388                 goto err_dl_port_unregister;
1389
1390         nsim_dev_port->ns = nsim_create(nsim_dev, nsim_dev_port);
1391         if (IS_ERR(nsim_dev_port->ns)) {
1392                 err = PTR_ERR(nsim_dev_port->ns);
1393                 goto err_port_debugfs_exit;
1394         }
1395
1396         if (nsim_dev_port_is_vf(nsim_dev_port)) {
1397                 err = devl_rate_leaf_create(&nsim_dev_port->devlink_port,
1398                                             nsim_dev_port);
1399                 if (err)
1400                         goto err_nsim_destroy;
1401         }
1402
1403         devlink_port_type_eth_set(devlink_port, nsim_dev_port->ns->netdev);
1404         list_add(&nsim_dev_port->list, &nsim_dev->port_list);
1405
1406         return 0;
1407
1408 err_nsim_destroy:
1409         nsim_destroy(nsim_dev_port->ns);
1410 err_port_debugfs_exit:
1411         nsim_dev_port_debugfs_exit(nsim_dev_port);
1412 err_dl_port_unregister:
1413         devl_port_unregister(devlink_port);
1414 err_port_free:
1415         kfree(nsim_dev_port);
1416         return err;
1417 }
1418
1419 static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port)
1420 {
1421         struct devlink_port *devlink_port = &nsim_dev_port->devlink_port;
1422
1423         list_del(&nsim_dev_port->list);
1424         if (nsim_dev_port_is_vf(nsim_dev_port))
1425                 devl_rate_leaf_destroy(&nsim_dev_port->devlink_port);
1426         devlink_port_type_clear(devlink_port);
1427         nsim_destroy(nsim_dev_port->ns);
1428         nsim_dev_port_debugfs_exit(nsim_dev_port);
1429         devl_port_unregister(devlink_port);
1430         kfree(nsim_dev_port);
1431 }
1432
1433 static void nsim_dev_port_del_all(struct nsim_dev *nsim_dev)
1434 {
1435         struct nsim_dev_port *nsim_dev_port, *tmp;
1436
1437         devl_lock(priv_to_devlink(nsim_dev));
1438         list_for_each_entry_safe(nsim_dev_port, tmp,
1439                                  &nsim_dev->port_list, list)
1440                 __nsim_dev_port_del(nsim_dev_port);
1441         devl_unlock(priv_to_devlink(nsim_dev));
1442 }
1443
1444 static int nsim_dev_port_add_all(struct nsim_dev *nsim_dev,
1445                                  unsigned int port_count)
1446 {
1447         int i, err;
1448
1449         for (i = 0; i < port_count; i++) {
1450                 devl_lock(priv_to_devlink(nsim_dev));
1451                 err = __nsim_dev_port_add(nsim_dev, NSIM_DEV_PORT_TYPE_PF, i);
1452                 devl_unlock(priv_to_devlink(nsim_dev));
1453                 if (err)
1454                         goto err_port_del_all;
1455         }
1456         return 0;
1457
1458 err_port_del_all:
1459         nsim_dev_port_del_all(nsim_dev);
1460         return err;
1461 }
1462
1463 static int nsim_dev_reload_create(struct nsim_dev *nsim_dev,
1464                                   struct netlink_ext_ack *extack)
1465 {
1466         struct nsim_bus_dev *nsim_bus_dev = nsim_dev->nsim_bus_dev;
1467         struct devlink *devlink;
1468         int err;
1469
1470         devlink = priv_to_devlink(nsim_dev);
1471         nsim_dev = devlink_priv(devlink);
1472         INIT_LIST_HEAD(&nsim_dev->port_list);
1473         nsim_dev->fw_update_status = true;
1474         nsim_dev->fw_update_overwrite_mask = 0;
1475
1476         nsim_devlink_param_load_driverinit_values(devlink);
1477
1478         err = nsim_dev_dummy_region_init(nsim_dev, devlink);
1479         if (err)
1480                 return err;
1481
1482         err = nsim_dev_traps_init(devlink);
1483         if (err)
1484                 goto err_dummy_region_exit;
1485
1486         nsim_dev->fib_data = nsim_fib_create(devlink, extack);
1487         if (IS_ERR(nsim_dev->fib_data)) {
1488                 err = PTR_ERR(nsim_dev->fib_data);
1489                 goto err_traps_exit;
1490         }
1491
1492         err = nsim_dev_health_init(nsim_dev, devlink);
1493         if (err)
1494                 goto err_fib_destroy;
1495
1496         err = nsim_dev_psample_init(nsim_dev);
1497         if (err)
1498                 goto err_health_exit;
1499
1500         err = nsim_dev_hwstats_init(nsim_dev);
1501         if (err)
1502                 goto err_psample_exit;
1503
1504         err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count);
1505         if (err)
1506                 goto err_hwstats_exit;
1507
1508         nsim_dev->take_snapshot = debugfs_create_file("take_snapshot",
1509                                                       0200,
1510                                                       nsim_dev->ddir,
1511                                                       nsim_dev,
1512                                                 &nsim_dev_take_snapshot_fops);
1513         return 0;
1514
1515 err_hwstats_exit:
1516         nsim_dev_hwstats_exit(nsim_dev);
1517 err_psample_exit:
1518         nsim_dev_psample_exit(nsim_dev);
1519 err_health_exit:
1520         nsim_dev_health_exit(nsim_dev);
1521 err_fib_destroy:
1522         nsim_fib_destroy(devlink, nsim_dev->fib_data);
1523 err_traps_exit:
1524         nsim_dev_traps_exit(devlink);
1525 err_dummy_region_exit:
1526         nsim_dev_dummy_region_exit(nsim_dev);
1527         return err;
1528 }
1529
1530 int nsim_drv_probe(struct nsim_bus_dev *nsim_bus_dev)
1531 {
1532         struct nsim_dev *nsim_dev;
1533         struct devlink *devlink;
1534         int err;
1535
1536         devlink = devlink_alloc_ns(&nsim_dev_devlink_ops, sizeof(*nsim_dev),
1537                                  nsim_bus_dev->initial_net, &nsim_bus_dev->dev);
1538         if (!devlink)
1539                 return -ENOMEM;
1540         nsim_dev = devlink_priv(devlink);
1541         nsim_dev->nsim_bus_dev = nsim_bus_dev;
1542         nsim_dev->switch_id.id_len = sizeof(nsim_dev->switch_id.id);
1543         get_random_bytes(nsim_dev->switch_id.id, nsim_dev->switch_id.id_len);
1544         INIT_LIST_HEAD(&nsim_dev->port_list);
1545         nsim_dev->fw_update_status = true;
1546         nsim_dev->fw_update_overwrite_mask = 0;
1547         nsim_dev->max_macs = NSIM_DEV_MAX_MACS_DEFAULT;
1548         nsim_dev->test1 = NSIM_DEV_TEST1_DEFAULT;
1549         spin_lock_init(&nsim_dev->fa_cookie_lock);
1550
1551         dev_set_drvdata(&nsim_bus_dev->dev, nsim_dev);
1552
1553         nsim_dev->vfconfigs = kcalloc(nsim_bus_dev->max_vfs,
1554                                       sizeof(struct nsim_vf_config),
1555                                       GFP_KERNEL | __GFP_NOWARN);
1556         if (!nsim_dev->vfconfigs) {
1557                 err = -ENOMEM;
1558                 goto err_devlink_free;
1559         }
1560
1561         err = nsim_dev_resources_register(devlink);
1562         if (err)
1563                 goto err_vfc_free;
1564
1565         err = devlink_params_register(devlink, nsim_devlink_params,
1566                                       ARRAY_SIZE(nsim_devlink_params));
1567         if (err)
1568                 goto err_dl_unregister;
1569         nsim_devlink_set_params_init_values(nsim_dev, devlink);
1570
1571         err = nsim_dev_dummy_region_init(nsim_dev, devlink);
1572         if (err)
1573                 goto err_params_unregister;
1574
1575         err = nsim_dev_traps_init(devlink);
1576         if (err)
1577                 goto err_dummy_region_exit;
1578
1579         err = nsim_dev_debugfs_init(nsim_dev);
1580         if (err)
1581                 goto err_traps_exit;
1582
1583         nsim_dev->fib_data = nsim_fib_create(devlink, NULL);
1584         if (IS_ERR(nsim_dev->fib_data)) {
1585                 err = PTR_ERR(nsim_dev->fib_data);
1586                 goto err_debugfs_exit;
1587         }
1588
1589         err = nsim_dev_health_init(nsim_dev, devlink);
1590         if (err)
1591                 goto err_fib_destroy;
1592
1593         err = nsim_bpf_dev_init(nsim_dev);
1594         if (err)
1595                 goto err_health_exit;
1596
1597         err = nsim_dev_psample_init(nsim_dev);
1598         if (err)
1599                 goto err_bpf_dev_exit;
1600
1601         err = nsim_dev_hwstats_init(nsim_dev);
1602         if (err)
1603                 goto err_psample_exit;
1604
1605         err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count);
1606         if (err)
1607                 goto err_hwstats_exit;
1608
1609         nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_LEGACY;
1610         devlink_set_features(devlink, DEVLINK_F_RELOAD);
1611         devlink_register(devlink);
1612         return 0;
1613
1614 err_hwstats_exit:
1615         nsim_dev_hwstats_exit(nsim_dev);
1616 err_psample_exit:
1617         nsim_dev_psample_exit(nsim_dev);
1618 err_bpf_dev_exit:
1619         nsim_bpf_dev_exit(nsim_dev);
1620 err_health_exit:
1621         nsim_dev_health_exit(nsim_dev);
1622 err_fib_destroy:
1623         nsim_fib_destroy(devlink, nsim_dev->fib_data);
1624 err_debugfs_exit:
1625         nsim_dev_debugfs_exit(nsim_dev);
1626 err_traps_exit:
1627         nsim_dev_traps_exit(devlink);
1628 err_dummy_region_exit:
1629         nsim_dev_dummy_region_exit(nsim_dev);
1630 err_params_unregister:
1631         devlink_params_unregister(devlink, nsim_devlink_params,
1632                                   ARRAY_SIZE(nsim_devlink_params));
1633 err_dl_unregister:
1634         devlink_resources_unregister(devlink);
1635 err_vfc_free:
1636         kfree(nsim_dev->vfconfigs);
1637 err_devlink_free:
1638         devlink_free(devlink);
1639         dev_set_drvdata(&nsim_bus_dev->dev, NULL);
1640         return err;
1641 }
1642
1643 static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev)
1644 {
1645         struct devlink *devlink = priv_to_devlink(nsim_dev);
1646
1647         if (devlink_is_reload_failed(devlink))
1648                 return;
1649         debugfs_remove(nsim_dev->take_snapshot);
1650
1651         devl_lock(devlink);
1652         if (nsim_dev_get_vfs(nsim_dev)) {
1653                 nsim_bus_dev_set_vfs(nsim_dev->nsim_bus_dev, 0);
1654                 if (nsim_esw_mode_is_switchdev(nsim_dev))
1655                         nsim_esw_legacy_enable(nsim_dev, NULL);
1656         }
1657         devl_unlock(devlink);
1658
1659         nsim_dev_port_del_all(nsim_dev);
1660         nsim_dev_hwstats_exit(nsim_dev);
1661         nsim_dev_psample_exit(nsim_dev);
1662         nsim_dev_health_exit(nsim_dev);
1663         nsim_fib_destroy(devlink, nsim_dev->fib_data);
1664         nsim_dev_traps_exit(devlink);
1665         nsim_dev_dummy_region_exit(nsim_dev);
1666 }
1667
1668 void nsim_drv_remove(struct nsim_bus_dev *nsim_bus_dev)
1669 {
1670         struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
1671         struct devlink *devlink = priv_to_devlink(nsim_dev);
1672
1673         devlink_unregister(devlink);
1674         nsim_dev_reload_destroy(nsim_dev);
1675
1676         nsim_bpf_dev_exit(nsim_dev);
1677         nsim_dev_debugfs_exit(nsim_dev);
1678         devlink_params_unregister(devlink, nsim_devlink_params,
1679                                   ARRAY_SIZE(nsim_devlink_params));
1680         devlink_resources_unregister(devlink);
1681         kfree(nsim_dev->vfconfigs);
1682         devlink_free(devlink);
1683         dev_set_drvdata(&nsim_bus_dev->dev, NULL);
1684 }
1685
1686 static struct nsim_dev_port *
1687 __nsim_dev_port_lookup(struct nsim_dev *nsim_dev, enum nsim_dev_port_type type,
1688                        unsigned int port_index)
1689 {
1690         struct nsim_dev_port *nsim_dev_port;
1691
1692         port_index = nsim_dev_port_index(type, port_index);
1693         list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list)
1694                 if (nsim_dev_port->port_index == port_index)
1695                         return nsim_dev_port;
1696         return NULL;
1697 }
1698
1699 int nsim_drv_port_add(struct nsim_bus_dev *nsim_bus_dev, enum nsim_dev_port_type type,
1700                       unsigned int port_index)
1701 {
1702         struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
1703         int err;
1704
1705         devl_lock(priv_to_devlink(nsim_dev));
1706         if (__nsim_dev_port_lookup(nsim_dev, type, port_index))
1707                 err = -EEXIST;
1708         else
1709                 err = __nsim_dev_port_add(nsim_dev, type, port_index);
1710         devl_unlock(priv_to_devlink(nsim_dev));
1711         return err;
1712 }
1713
1714 int nsim_drv_port_del(struct nsim_bus_dev *nsim_bus_dev, enum nsim_dev_port_type type,
1715                       unsigned int port_index)
1716 {
1717         struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
1718         struct nsim_dev_port *nsim_dev_port;
1719         int err = 0;
1720
1721         devl_lock(priv_to_devlink(nsim_dev));
1722         nsim_dev_port = __nsim_dev_port_lookup(nsim_dev, type, port_index);
1723         if (!nsim_dev_port)
1724                 err = -ENOENT;
1725         else
1726                 __nsim_dev_port_del(nsim_dev_port);
1727         devl_unlock(priv_to_devlink(nsim_dev));
1728         return err;
1729 }
1730
1731 int nsim_drv_configure_vfs(struct nsim_bus_dev *nsim_bus_dev,
1732                            unsigned int num_vfs)
1733 {
1734         struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
1735         struct devlink *devlink = priv_to_devlink(nsim_dev);
1736         int ret = 0;
1737
1738         devl_lock(devlink);
1739         if (nsim_bus_dev->num_vfs == num_vfs)
1740                 goto exit_unlock;
1741         if (nsim_bus_dev->num_vfs && num_vfs) {
1742                 ret = -EBUSY;
1743                 goto exit_unlock;
1744         }
1745         if (nsim_bus_dev->max_vfs < num_vfs) {
1746                 ret = -ENOMEM;
1747                 goto exit_unlock;
1748         }
1749
1750         nsim_bus_dev_set_vfs(nsim_bus_dev, num_vfs);
1751         if (nsim_esw_mode_is_switchdev(nsim_dev)) {
1752                 if (num_vfs) {
1753                         ret = nsim_esw_switchdev_enable(nsim_dev, NULL);
1754                         if (ret) {
1755                                 nsim_bus_dev_set_vfs(nsim_bus_dev, 0);
1756                                 goto exit_unlock;
1757                         }
1758                 } else {
1759                         nsim_esw_legacy_enable(nsim_dev, NULL);
1760                 }
1761         }
1762
1763 exit_unlock:
1764         devl_unlock(devlink);
1765
1766         return ret;
1767 }
1768
1769 int nsim_dev_init(void)
1770 {
1771         nsim_dev_ddir = debugfs_create_dir(DRV_NAME, NULL);
1772         return PTR_ERR_OR_ZERO(nsim_dev_ddir);
1773 }
1774
1775 void nsim_dev_exit(void)
1776 {
1777         debugfs_remove_recursive(nsim_dev_ddir);
1778 }