drivers/net/netdevsim/dev.c

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