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                 err = PTR_ERR(nsim_dev->ports_ddir);
 314                 goto err_ddir;
 315         }
 316         debugfs_create_bool("fw_update_status", 0600, nsim_dev->ddir,
 317                             &nsim_dev->fw_update_status);
 318         debugfs_create_u32("fw_update_overwrite_mask", 0600, nsim_dev->ddir,
 319                             &nsim_dev->fw_update_overwrite_mask);
 320         debugfs_create_u32("max_macs", 0600, nsim_dev->ddir,
 321                            &nsim_dev->max_macs);
 322         debugfs_create_bool("test1", 0600, nsim_dev->ddir,
 323                             &nsim_dev->test1);
 324         nsim_dev->take_snapshot = debugfs_create_file("take_snapshot",
 325                                                       0200,
 326                                                       nsim_dev->ddir,
 327                                                       nsim_dev,
 328                                                 &nsim_dev_take_snapshot_fops);
 329         debugfs_create_bool("dont_allow_reload", 0600, nsim_dev->ddir,
 330                             &nsim_dev->dont_allow_reload);
 331         debugfs_create_bool("fail_reload", 0600, nsim_dev->ddir,
 332                             &nsim_dev->fail_reload);
 333         debugfs_create_file("trap_flow_action_cookie", 0600, nsim_dev->ddir,
 334                             nsim_dev, &nsim_dev_trap_fa_cookie_fops);
 335         debugfs_create_bool("fail_trap_group_set", 0600,
 336                             nsim_dev->ddir,
 337                             &nsim_dev->fail_trap_group_set);
 338         debugfs_create_bool("fail_trap_policer_set", 0600,
 339                             nsim_dev->ddir,
 340                             &nsim_dev->fail_trap_policer_set);
 341         debugfs_create_bool("fail_trap_policer_counter_get", 0600,
 342                             nsim_dev->ddir,
 343                             &nsim_dev->fail_trap_policer_counter_get);
 344         /* caution, dev_max_vfs write takes devlink lock */
 345         debugfs_create_file("max_vfs", 0600, nsim_dev->ddir,
 346                             nsim_dev, &nsim_dev_max_vfs_fops);
 347
 348         nsim_dev->nodes_ddir = debugfs_create_dir("rate_nodes", nsim_dev->ddir);
 349         if (IS_ERR(nsim_dev->nodes_ddir)) {
 350                 err = PTR_ERR(nsim_dev->nodes_ddir);
 351                 goto err_ports_ddir;
 352         }
 353         debugfs_create_bool("fail_trap_drop_counter_get", 0600,
 354                             nsim_dev->ddir,
 355                             &nsim_dev->fail_trap_drop_counter_get);
 356         nsim_udp_tunnels_debugfs_create(nsim_dev);
 357         return 0;
 358
 359 err_ports_ddir:
 360         debugfs_remove_recursive(nsim_dev->ports_ddir);
 361 err_ddir:
 362         debugfs_remove_recursive(nsim_dev->ddir);
 363         return err;
 364 }
 365
 366 static void nsim_dev_debugfs_exit(struct nsim_dev *nsim_dev)
 367 {
 368         debugfs_remove_recursive(nsim_dev->nodes_ddir);
 369         debugfs_remove_recursive(nsim_dev->ports_ddir);
 370         debugfs_remove_recursive(nsim_dev->ddir);
 371 }
 372
 373 static ssize_t nsim_dev_rate_parent_read(struct file *file,
 374                                          char __user *data,
 375                                          size_t count, loff_t *ppos)
 376 {
 377         char **name_ptr = file->private_data;
 378         size_t len;
 379
 380         if (!*name_ptr)
 381                 return 0;
 382
 383         len = strlen(*name_ptr);
 384         return simple_read_from_buffer(data, count, ppos, *name_ptr, len);
 385 }
 386
 387 static const struct file_operations nsim_dev_rate_parent_fops = {
 388         .open = simple_open,
 389         .read = nsim_dev_rate_parent_read,
 390         .llseek = generic_file_llseek,
 391         .owner = THIS_MODULE,
 392 };
 393
 394 static int nsim_dev_port_debugfs_init(struct nsim_dev *nsim_dev,
 395                                       struct nsim_dev_port *nsim_dev_port)
 396 {
 397         struct nsim_bus_dev *nsim_bus_dev = nsim_dev->nsim_bus_dev;
 398         unsigned int port_index = nsim_dev_port->port_index;
 399         char port_ddir_name[16];
 400         char dev_link_name[32];
 401
 402         sprintf(port_ddir_name, "%u", port_index);
 403         nsim_dev_port->ddir = debugfs_create_dir(port_ddir_name,
 404                                                  nsim_dev->ports_ddir);
 405         if (IS_ERR(nsim_dev_port->ddir))
 406                 return PTR_ERR(nsim_dev_port->ddir);
 407
 408         sprintf(dev_link_name, "../../../" DRV_NAME "%u", nsim_bus_dev->dev.id);
 409         if (nsim_dev_port_is_vf(nsim_dev_port)) {
 410                 unsigned int vf_id = nsim_dev_port_index_to_vf_index(port_index);
 411
 412                 debugfs_create_u16("tx_share", 0400, nsim_dev_port->ddir,
 413                                    &nsim_dev->vfconfigs[vf_id].min_tx_rate);
 414                 debugfs_create_u16("tx_max", 0400, nsim_dev_port->ddir,
 415                                    &nsim_dev->vfconfigs[vf_id].max_tx_rate);
 416                 nsim_dev_port->rate_parent = debugfs_create_file("rate_parent",
 417                                                                  0400,
 418                                                                  nsim_dev_port->ddir,
 419                                                                  &nsim_dev_port->parent_name,
 420                                                                  &nsim_dev_rate_parent_fops);
 421         }
 422         debugfs_create_symlink("dev", nsim_dev_port->ddir, dev_link_name);
 423
 424         return 0;
 425 }
 426
 427 static void nsim_dev_port_debugfs_exit(struct nsim_dev_port *nsim_dev_port)
 428 {
 429         debugfs_remove_recursive(nsim_dev_port->ddir);
 430 }
 431
 432 static int nsim_dev_resources_register(struct devlink *devlink)
 433 {
 434         struct devlink_resource_size_params params = {
 435                 .size_max = (u64)-1,
 436                 .size_granularity = 1,
 437                 .unit = DEVLINK_RESOURCE_UNIT_ENTRY
 438         };
 439         int err;
 440
 441         /* Resources for IPv4 */
 442         err = devl_resource_register(devlink, "IPv4", (u64)-1,
 443                                      NSIM_RESOURCE_IPV4,
 444                                      DEVLINK_RESOURCE_ID_PARENT_TOP,
 445                                      &params);
 446         if (err) {
 447                 pr_err("Failed to register IPv4 top resource\n");
 448                 goto err_out;
 449         }
 450
 451         err = devl_resource_register(devlink, "fib", (u64)-1,
 452                                      NSIM_RESOURCE_IPV4_FIB,
 453                                      NSIM_RESOURCE_IPV4, &params);
 454         if (err) {
 455                 pr_err("Failed to register IPv4 FIB resource\n");
 456                 goto err_out;
 457         }
 458
 459         err = devl_resource_register(devlink, "fib-rules", (u64)-1,
 460                                      NSIM_RESOURCE_IPV4_FIB_RULES,
 461                                      NSIM_RESOURCE_IPV4, &params);
 462         if (err) {
 463                 pr_err("Failed to register IPv4 FIB rules resource\n");
 464                 goto err_out;
 465         }
 466
 467         /* Resources for IPv6 */
 468         err = devl_resource_register(devlink, "IPv6", (u64)-1,
 469                                      NSIM_RESOURCE_IPV6,
 470                                      DEVLINK_RESOURCE_ID_PARENT_TOP,
 471                                      &params);
 472         if (err) {
 473                 pr_err("Failed to register IPv6 top resource\n");
 474                 goto err_out;
 475         }
 476
 477         err = devl_resource_register(devlink, "fib", (u64)-1,
 478                                      NSIM_RESOURCE_IPV6_FIB,
 479                                      NSIM_RESOURCE_IPV6, &params);
 480         if (err) {
 481                 pr_err("Failed to register IPv6 FIB resource\n");
 482                 goto err_out;
 483         }
 484
 485         err = devl_resource_register(devlink, "fib-rules", (u64)-1,
 486                                      NSIM_RESOURCE_IPV6_FIB_RULES,
 487                                      NSIM_RESOURCE_IPV6, &params);
 488         if (err) {
 489                 pr_err("Failed to register IPv6 FIB rules resource\n");
 490                 goto err_out;
 491         }
 492
 493         /* Resources for nexthops */
 494         err = devl_resource_register(devlink, "nexthops", (u64)-1,
 495                                      NSIM_RESOURCE_NEXTHOPS,
 496                                      DEVLINK_RESOURCE_ID_PARENT_TOP,
 497                                      &params);
 498         if (err) {
 499                 pr_err("Failed to register NEXTHOPS resource\n");
 500                 goto err_out;
 501         }
 502         return 0;
 503
 504 err_out:
 505         devl_resources_unregister(devlink);
 506         return err;
 507 }
 508
 509 enum nsim_devlink_param_id {
 510         NSIM_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX,
 511         NSIM_DEVLINK_PARAM_ID_TEST1,
 512 };
 513
 514 static const struct devlink_param nsim_devlink_params[] = {
 515         DEVLINK_PARAM_GENERIC(MAX_MACS,
 516                               BIT(DEVLINK_PARAM_CMODE_DRIVERINIT),
 517                               NULL, NULL, NULL),
 518         DEVLINK_PARAM_DRIVER(NSIM_DEVLINK_PARAM_ID_TEST1,
 519                              "test1", DEVLINK_PARAM_TYPE_BOOL,
 520                              BIT(DEVLINK_PARAM_CMODE_DRIVERINIT),
 521                              NULL, NULL, NULL),
 522 };
 523
 524 static void nsim_devlink_set_params_init_values(struct nsim_dev *nsim_dev,
 525                                                 struct devlink *devlink)
 526 {
 527         union devlink_param_value value;
 528
 529         value.vu32 = nsim_dev->max_macs;
 530         devlink_param_driverinit_value_set(devlink,
 531                                            DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
 532                                            value);
 533         value.vbool = nsim_dev->test1;
 534         devlink_param_driverinit_value_set(devlink,
 535                                            NSIM_DEVLINK_PARAM_ID_TEST1,
 536                                            value);
 537 }
 538
 539 static void nsim_devlink_param_load_driverinit_values(struct devlink *devlink)
 540 {
 541         struct nsim_dev *nsim_dev = devlink_priv(devlink);
 542         union devlink_param_value saved_value;
 543         int err;
 544
 545         err = devlink_param_driverinit_value_get(devlink,
 546                                                  DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
 547                                                  &saved_value);
 548         if (!err)
 549                 nsim_dev->max_macs = saved_value.vu32;
 550         err = devlink_param_driverinit_value_get(devlink,
 551                                                  NSIM_DEVLINK_PARAM_ID_TEST1,
 552                                                  &saved_value);
 553         if (!err)
 554                 nsim_dev->test1 = saved_value.vbool;
 555 }
 556
 557 #define NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX 16
 558
 559 static const struct devlink_region_ops dummy_region_ops = {
 560         .name = "dummy",
 561         .destructor = &kfree,
 562         .snapshot = nsim_dev_take_snapshot,
 563 };
 564
 565 static int nsim_dev_dummy_region_init(struct nsim_dev *nsim_dev,
 566                                       struct devlink *devlink)
 567 {
 568         nsim_dev->dummy_region =
 569                 devl_region_create(devlink, &dummy_region_ops,
 570                                    NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX,
 571                                    NSIM_DEV_DUMMY_REGION_SIZE);
 572         return PTR_ERR_OR_ZERO(nsim_dev->dummy_region);
 573 }
 574
 575 static void nsim_dev_dummy_region_exit(struct nsim_dev *nsim_dev)
 576 {
 577         devl_region_destroy(nsim_dev->dummy_region);
 578 }
 579
 580 static int
 581 __nsim_dev_port_add(struct nsim_dev *nsim_dev, enum nsim_dev_port_type type,
 582                     unsigned int port_index);
 583 static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port);
 584
 585 static int nsim_esw_legacy_enable(struct nsim_dev *nsim_dev,
 586                                   struct netlink_ext_ack *extack)
 587 {
 588         struct devlink *devlink = priv_to_devlink(nsim_dev);
 589         struct nsim_dev_port *nsim_dev_port, *tmp;
 590
 591         devl_rate_nodes_destroy(devlink);
 592         list_for_each_entry_safe(nsim_dev_port, tmp, &nsim_dev->port_list, list)
 593                 if (nsim_dev_port_is_vf(nsim_dev_port))
 594                         __nsim_dev_port_del(nsim_dev_port);
 595         nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_LEGACY;
 596         return 0;
 597 }
 598
 599 static int nsim_esw_switchdev_enable(struct nsim_dev *nsim_dev,
 600                                      struct netlink_ext_ack *extack)
 601 {
 602         struct nsim_dev_port *nsim_dev_port, *tmp;
 603         int i, err;
 604
 605         for (i = 0; i < nsim_dev_get_vfs(nsim_dev); i++) {
 606                 err = __nsim_dev_port_add(nsim_dev, NSIM_DEV_PORT_TYPE_VF, i);
 607                 if (err) {
 608                         NL_SET_ERR_MSG_MOD(extack, "Failed to initialize VFs' netdevsim ports");
 609                         pr_err("Failed to initialize VF id=%d. %d.\n", i, err);
 610                         goto err_port_add_vfs;
 611                 }
 612         }
 613         nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_SWITCHDEV;
 614         return 0;
 615
 616 err_port_add_vfs:
 617         list_for_each_entry_safe(nsim_dev_port, tmp, &nsim_dev->port_list, list)
 618                 if (nsim_dev_port_is_vf(nsim_dev_port))
 619                         __nsim_dev_port_del(nsim_dev_port);
 620         return err;
 621 }
 622
 623 static int nsim_devlink_eswitch_mode_set(struct devlink *devlink, u16 mode,
 624                                          struct netlink_ext_ack *extack)
 625 {
 626         struct nsim_dev *nsim_dev = devlink_priv(devlink);
 627
 628         if (mode == nsim_dev->esw_mode)
 629                 return 0;
 630
 631         if (mode == DEVLINK_ESWITCH_MODE_LEGACY)
 632                 return nsim_esw_legacy_enable(nsim_dev, extack);
 633         if (mode == DEVLINK_ESWITCH_MODE_SWITCHDEV)
 634                 return nsim_esw_switchdev_enable(nsim_dev, extack);
 635
 636         return -EINVAL;
 637 }
 638
 639 static int nsim_devlink_eswitch_mode_get(struct devlink *devlink, u16 *mode)
 640 {
 641         struct nsim_dev *nsim_dev = devlink_priv(devlink);
 642
 643         *mode = nsim_dev->esw_mode;
 644         return 0;
 645 }
 646
 647 struct nsim_trap_item {
 648         void *trap_ctx;
 649         enum devlink_trap_action action;
 650 };
 651
 652 struct nsim_trap_data {
 653         struct delayed_work trap_report_dw;
 654         struct nsim_trap_item *trap_items_arr;
 655         u64 *trap_policers_cnt_arr;
 656         u64 trap_pkt_cnt;
 657         struct nsim_dev *nsim_dev;
 658         spinlock_t trap_lock;   /* Protects trap_items_arr */
 659 };
 660
 661 /* All driver-specific traps must be documented in
 662  * Documentation/networking/devlink/netdevsim.rst
 663  */
 664 enum {
 665         NSIM_TRAP_ID_BASE = DEVLINK_TRAP_GENERIC_ID_MAX,
 666         NSIM_TRAP_ID_FID_MISS,
 667 };
 668
 669 #define NSIM_TRAP_NAME_FID_MISS "fid_miss"
 670
 671 #define NSIM_TRAP_METADATA DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT
 672
 673 #define NSIM_TRAP_DROP(_id, _group_id)                                        \
 674         DEVLINK_TRAP_GENERIC(DROP, DROP, _id,                                 \
 675                              DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id,       \
 676                              NSIM_TRAP_METADATA)
 677 #define NSIM_TRAP_DROP_EXT(_id, _group_id, _metadata)                         \
 678         DEVLINK_TRAP_GENERIC(DROP, DROP, _id,                                 \
 679                              DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id,       \
 680                              NSIM_TRAP_METADATA | (_metadata))
 681 #define NSIM_TRAP_EXCEPTION(_id, _group_id)                                   \
 682         DEVLINK_TRAP_GENERIC(EXCEPTION, TRAP, _id,                            \
 683                              DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id,       \
 684                              NSIM_TRAP_METADATA)
 685 #define NSIM_TRAP_CONTROL(_id, _group_id, _action)                            \
 686         DEVLINK_TRAP_GENERIC(CONTROL, _action, _id,                           \
 687                              DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id,       \
 688                              NSIM_TRAP_METADATA)
 689 #define NSIM_TRAP_DRIVER_EXCEPTION(_id, _group_id)                            \
 690         DEVLINK_TRAP_DRIVER(EXCEPTION, TRAP, NSIM_TRAP_ID_##_id,              \
 691                             NSIM_TRAP_NAME_##_id,                             \
 692                             DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id,        \
 693                             NSIM_TRAP_METADATA)
 694
 695 #define NSIM_DEV_TRAP_POLICER_MIN_RATE  1
 696 #define NSIM_DEV_TRAP_POLICER_MAX_RATE  8000
 697 #define NSIM_DEV_TRAP_POLICER_MIN_BURST 8
 698 #define NSIM_DEV_TRAP_POLICER_MAX_BURST 65536
 699
 700 #define NSIM_TRAP_POLICER(_id, _rate, _burst)                                 \
 701         DEVLINK_TRAP_POLICER(_id, _rate, _burst,                              \
 702                              NSIM_DEV_TRAP_POLICER_MAX_RATE,                  \
 703                              NSIM_DEV_TRAP_POLICER_MIN_RATE,                  \
 704                              NSIM_DEV_TRAP_POLICER_MAX_BURST,                 \
 705                              NSIM_DEV_TRAP_POLICER_MIN_BURST)
 706
 707 static const struct devlink_trap_policer nsim_trap_policers_arr[] = {
 708         NSIM_TRAP_POLICER(1, 1000, 128),
 709         NSIM_TRAP_POLICER(2, 2000, 256),
 710         NSIM_TRAP_POLICER(3, 3000, 512),
 711 };
 712
 713 static const struct devlink_trap_group nsim_trap_groups_arr[] = {
 714         DEVLINK_TRAP_GROUP_GENERIC(L2_DROPS, 0),
 715         DEVLINK_TRAP_GROUP_GENERIC(L3_DROPS, 1),
 716         DEVLINK_TRAP_GROUP_GENERIC(L3_EXCEPTIONS, 1),
 717         DEVLINK_TRAP_GROUP_GENERIC(BUFFER_DROPS, 2),
 718         DEVLINK_TRAP_GROUP_GENERIC(ACL_DROPS, 3),
 719         DEVLINK_TRAP_GROUP_GENERIC(MC_SNOOPING, 3),
 720 };
 721
 722 static const struct devlink_trap nsim_traps_arr[] = {
 723         NSIM_TRAP_DROP(SMAC_MC, L2_DROPS),
 724         NSIM_TRAP_DROP(VLAN_TAG_MISMATCH, L2_DROPS),
 725         NSIM_TRAP_DROP(INGRESS_VLAN_FILTER, L2_DROPS),
 726         NSIM_TRAP_DROP(INGRESS_STP_FILTER, L2_DROPS),
 727         NSIM_TRAP_DROP(EMPTY_TX_LIST, L2_DROPS),
 728         NSIM_TRAP_DROP(PORT_LOOPBACK_FILTER, L2_DROPS),
 729         NSIM_TRAP_DRIVER_EXCEPTION(FID_MISS, L2_DROPS),
 730         NSIM_TRAP_DROP(BLACKHOLE_ROUTE, L3_DROPS),
 731         NSIM_TRAP_EXCEPTION(TTL_ERROR, L3_EXCEPTIONS),
 732         NSIM_TRAP_DROP(TAIL_DROP, BUFFER_DROPS),
 733         NSIM_TRAP_DROP_EXT(INGRESS_FLOW_ACTION_DROP, ACL_DROPS,
 734                            DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE),
 735         NSIM_TRAP_DROP_EXT(EGRESS_FLOW_ACTION_DROP, ACL_DROPS,
 736                            DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE),
 737         NSIM_TRAP_CONTROL(IGMP_QUERY, MC_SNOOPING, MIRROR),
 738         NSIM_TRAP_CONTROL(IGMP_V1_REPORT, MC_SNOOPING, TRAP),
 739 };
 740
 741 #define NSIM_TRAP_L4_DATA_LEN 100
 742
 743 static struct sk_buff *nsim_dev_trap_skb_build(void)
 744 {
 745         int tot_len, data_len = NSIM_TRAP_L4_DATA_LEN;
 746         struct sk_buff *skb;
 747         struct udphdr *udph;
 748         struct ethhdr *eth;
 749         struct iphdr *iph;
 750
 751         skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
 752         if (!skb)
 753                 return NULL;
 754         tot_len = sizeof(struct iphdr) + sizeof(struct udphdr) + data_len;
 755
 756         skb_reset_mac_header(skb);
 757         eth = skb_put(skb, sizeof(struct ethhdr));
 758         eth_random_addr(eth->h_dest);
 759         eth_random_addr(eth->h_source);
 760         eth->h_proto = htons(ETH_P_IP);
 761         skb->protocol = htons(ETH_P_IP);
 762
 763         skb_set_network_header(skb, skb->len);
 764         iph = skb_put(skb, sizeof(struct iphdr));
 765         iph->protocol = IPPROTO_UDP;
 766         iph->saddr = in_aton("192.0.2.1");
 767         iph->daddr = in_aton("198.51.100.1");
 768         iph->version = 0x4;
 769         iph->frag_off = 0;
 770         iph->ihl = 0x5;
 771         iph->tot_len = htons(tot_len);
 772         iph->ttl = 100;
 773         iph->check = 0;
 774         iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
 775
 776         skb_set_transport_header(skb, skb->len);
 777         udph = skb_put_zero(skb, sizeof(struct udphdr) + data_len);
 778         get_random_bytes(&udph->source, sizeof(u16));
 779         get_random_bytes(&udph->dest, sizeof(u16));
 780         udph->len = htons(sizeof(struct udphdr) + data_len);
 781
 782         return skb;
 783 }
 784
 785 static void nsim_dev_trap_report(struct nsim_dev_port *nsim_dev_port)
 786 {
 787         struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev;
 788         struct devlink *devlink = priv_to_devlink(nsim_dev);
 789         struct nsim_trap_data *nsim_trap_data;
 790         int i;
 791
 792         nsim_trap_data = nsim_dev->trap_data;
 793
 794         spin_lock(&nsim_trap_data->trap_lock);
 795         for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) {
 796                 struct flow_action_cookie *fa_cookie = NULL;
 797                 struct nsim_trap_item *nsim_trap_item;
 798                 struct sk_buff *skb;
 799                 bool has_fa_cookie;
 800
 801                 has_fa_cookie = nsim_traps_arr[i].metadata_cap &
 802                                 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE;
 803
 804                 nsim_trap_item = &nsim_trap_data->trap_items_arr[i];
 805                 if (nsim_trap_item->action == DEVLINK_TRAP_ACTION_DROP)
 806                         continue;
 807
 808                 skb = nsim_dev_trap_skb_build();
 809                 if (!skb)
 810                         continue;
 811                 skb->dev = nsim_dev_port->ns->netdev;
 812
 813                 /* Trapped packets are usually passed to devlink in softIRQ,
 814                  * but in this case they are generated in a workqueue. Disable
 815                  * softIRQs to prevent lockdep from complaining about
 816                  * "incosistent lock state".
 817                  */
 818
 819                 spin_lock_bh(&nsim_dev->fa_cookie_lock);
 820                 fa_cookie = has_fa_cookie ? nsim_dev->fa_cookie : NULL;
 821                 devlink_trap_report(devlink, skb, nsim_trap_item->trap_ctx,
 822                                     &nsim_dev_port->devlink_port, fa_cookie);
 823                 spin_unlock_bh(&nsim_dev->fa_cookie_lock);
 824                 consume_skb(skb);
 825         }
 826         spin_unlock(&nsim_trap_data->trap_lock);
 827 }
 828
 829 #define NSIM_TRAP_REPORT_INTERVAL_MS    100
 830
 831 static void nsim_dev_trap_report_work(struct work_struct *work)
 832 {
 833         struct nsim_trap_data *nsim_trap_data;
 834         struct nsim_dev_port *nsim_dev_port;
 835         struct nsim_dev *nsim_dev;
 836
 837         nsim_trap_data = container_of(work, struct nsim_trap_data,
 838                                       trap_report_dw.work);
 839         nsim_dev = nsim_trap_data->nsim_dev;
 840
 841         /* For each running port and enabled packet trap, generate a UDP
 842          * packet with a random 5-tuple and report it.
 843          */
 844         if (!devl_trylock(priv_to_devlink(nsim_dev))) {
 845                 schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw, 0);
 846                 return;
 847         }
 848
 849         list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list) {
 850                 if (!netif_running(nsim_dev_port->ns->netdev))
 851                         continue;
 852
 853                 nsim_dev_trap_report(nsim_dev_port);
 854         }
 855         devl_unlock(priv_to_devlink(nsim_dev));
 856
 857         schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw,
 858                               msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS));
 859 }
 860
 861 static int nsim_dev_traps_init(struct devlink *devlink)
 862 {
 863         size_t policers_count = ARRAY_SIZE(nsim_trap_policers_arr);
 864         struct nsim_dev *nsim_dev = devlink_priv(devlink);
 865         struct nsim_trap_data *nsim_trap_data;
 866         int err;
 867
 868         nsim_trap_data = kzalloc(sizeof(*nsim_trap_data), GFP_KERNEL);
 869         if (!nsim_trap_data)
 870                 return -ENOMEM;
 871
 872         nsim_trap_data->trap_items_arr = kcalloc(ARRAY_SIZE(nsim_traps_arr),
 873                                                  sizeof(struct nsim_trap_item),
 874                                                  GFP_KERNEL);
 875         if (!nsim_trap_data->trap_items_arr) {
 876                 err = -ENOMEM;
 877                 goto err_trap_data_free;
 878         }
 879
 880         nsim_trap_data->trap_policers_cnt_arr = kcalloc(policers_count,
 881                                                         sizeof(u64),
 882                                                         GFP_KERNEL);
 883         if (!nsim_trap_data->trap_policers_cnt_arr) {
 884                 err = -ENOMEM;
 885                 goto err_trap_items_free;
 886         }
 887
 888         /* The lock is used to protect the action state of the registered
 889          * traps. The value is written by user and read in delayed work when
 890          * iterating over all the traps.
 891          */
 892         spin_lock_init(&nsim_trap_data->trap_lock);
 893         nsim_trap_data->nsim_dev = nsim_dev;
 894         nsim_dev->trap_data = nsim_trap_data;
 895
 896         err = devl_trap_policers_register(devlink, nsim_trap_policers_arr,
 897                                           policers_count);
 898         if (err)
 899                 goto err_trap_policers_cnt_free;
 900
 901         err = devl_trap_groups_register(devlink, nsim_trap_groups_arr,
 902                                         ARRAY_SIZE(nsim_trap_groups_arr));
 903         if (err)
 904                 goto err_trap_policers_unregister;
 905
 906         err = devl_traps_register(devlink, nsim_traps_arr,
 907                                   ARRAY_SIZE(nsim_traps_arr), NULL);
 908         if (err)
 909                 goto err_trap_groups_unregister;
 910
 911         INIT_DELAYED_WORK(&nsim_dev->trap_data->trap_report_dw,
 912                           nsim_dev_trap_report_work);
 913         schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw,
 914                               msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS));
 915
 916         return 0;
 917
 918 err_trap_groups_unregister:
 919         devl_trap_groups_unregister(devlink, nsim_trap_groups_arr,
 920                                     ARRAY_SIZE(nsim_trap_groups_arr));
 921 err_trap_policers_unregister:
 922         devl_trap_policers_unregister(devlink, nsim_trap_policers_arr,
 923                                       ARRAY_SIZE(nsim_trap_policers_arr));
 924 err_trap_policers_cnt_free:
 925         kfree(nsim_trap_data->trap_policers_cnt_arr);
 926 err_trap_items_free:
 927         kfree(nsim_trap_data->trap_items_arr);
 928 err_trap_data_free:
 929         kfree(nsim_trap_data);
 930         return err;
 931 }
 932
 933 static void nsim_dev_traps_exit(struct devlink *devlink)
 934 {
 935         struct nsim_dev *nsim_dev = devlink_priv(devlink);
 936
 937         /* caution, trap work takes devlink lock */
 938         cancel_delayed_work_sync(&nsim_dev->trap_data->trap_report_dw);
 939         devl_traps_unregister(devlink, nsim_traps_arr,
 940                               ARRAY_SIZE(nsim_traps_arr));
 941         devl_trap_groups_unregister(devlink, nsim_trap_groups_arr,
 942                                     ARRAY_SIZE(nsim_trap_groups_arr));
 943         devl_trap_policers_unregister(devlink, nsim_trap_policers_arr,
 944                                       ARRAY_SIZE(nsim_trap_policers_arr));
 945         kfree(nsim_dev->trap_data->trap_policers_cnt_arr);
 946         kfree(nsim_dev->trap_data->trap_items_arr);
 947         kfree(nsim_dev->trap_data);
 948 }
 949
 950 static int nsim_dev_reload_create(struct nsim_dev *nsim_dev,
 951                                   struct netlink_ext_ack *extack);
 952 static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev);
 953
 954 static int nsim_dev_reload_down(struct devlink *devlink, bool netns_change,
 955                                 enum devlink_reload_action action, enum devlink_reload_limit limit,
 956                                 struct netlink_ext_ack *extack)
 957 {
 958         struct nsim_dev *nsim_dev = devlink_priv(devlink);
 959
 960         if (nsim_dev->dont_allow_reload) {
 961                 /* For testing purposes, user set debugfs dont_allow_reload
 962                  * value to true. So forbid it.
 963                  */
 964                 NL_SET_ERR_MSG_MOD(extack, "User forbid the reload for testing purposes");
 965                 return -EOPNOTSUPP;
 966         }
 967
 968         nsim_dev_reload_destroy(nsim_dev);
 969         return 0;
 970 }
 971
 972 static int nsim_dev_reload_up(struct devlink *devlink, enum devlink_reload_action action,
 973                               enum devlink_reload_limit limit, u32 *actions_performed,
 974                               struct netlink_ext_ack *extack)
 975 {
 976         struct nsim_dev *nsim_dev = devlink_priv(devlink);
 977
 978         if (nsim_dev->fail_reload) {
 979                 /* For testing purposes, user set debugfs fail_reload
 980                  * value to true. Fail right away.
 981                  */
 982                 NL_SET_ERR_MSG_MOD(extack, "User setup the reload to fail for testing purposes");
 983                 return -EINVAL;
 984         }
 985
 986         *actions_performed = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT);
 987
 988         return nsim_dev_reload_create(nsim_dev, extack);
 989 }
 990
 991 static int nsim_dev_info_get(struct devlink *devlink,
 992                              struct devlink_info_req *req,
 993                              struct netlink_ext_ack *extack)
 994 {
 995         int err;
 996
 997         err = devlink_info_driver_name_put(req, DRV_NAME);
 998         if (err)
 999                 return err;
1000         err = devlink_info_version_stored_put_ext(req, "fw.mgmt", "10.20.30",
1001                                                   DEVLINK_INFO_VERSION_TYPE_COMPONENT);
1002         if (err)
1003                 return err;
1004         return devlink_info_version_running_put_ext(req, "fw.mgmt", "10.20.30",
1005                                                     DEVLINK_INFO_VERSION_TYPE_COMPONENT);
1006 }
1007
1008 #define NSIM_DEV_FLASH_SIZE 500000
1009 #define NSIM_DEV_FLASH_CHUNK_SIZE 1000
1010 #define NSIM_DEV_FLASH_CHUNK_TIME_MS 10
1011
1012 static int nsim_dev_flash_update(struct devlink *devlink,
1013                                  struct devlink_flash_update_params *params,
1014                                  struct netlink_ext_ack *extack)
1015 {
1016         struct nsim_dev *nsim_dev = devlink_priv(devlink);
1017         int i;
1018
1019         if ((params->overwrite_mask & ~nsim_dev->fw_update_overwrite_mask) != 0)
1020                 return -EOPNOTSUPP;
1021
1022         if (nsim_dev->fw_update_status) {
1023                 devlink_flash_update_status_notify(devlink,
1024                                                    "Preparing to flash",
1025                                                    params->component, 0, 0);
1026         }
1027
1028         for (i = 0; i < NSIM_DEV_FLASH_SIZE / NSIM_DEV_FLASH_CHUNK_SIZE; i++) {
1029                 if (nsim_dev->fw_update_status)
1030                         devlink_flash_update_status_notify(devlink, "Flashing",
1031                                                            params->component,
1032                                                            i * NSIM_DEV_FLASH_CHUNK_SIZE,
1033                                                            NSIM_DEV_FLASH_SIZE);
1034                 msleep(NSIM_DEV_FLASH_CHUNK_TIME_MS);
1035         }
1036
1037         if (nsim_dev->fw_update_status) {
1038                 devlink_flash_update_status_notify(devlink, "Flashing",
1039                                                    params->component,
1040                                                    NSIM_DEV_FLASH_SIZE,
1041                                                    NSIM_DEV_FLASH_SIZE);
1042                 devlink_flash_update_timeout_notify(devlink, "Flash select",
1043                                                     params->component, 81);
1044                 devlink_flash_update_status_notify(devlink, "Flashing done",
1045                                                    params->component, 0, 0);
1046         }
1047
1048         return 0;
1049 }
1050
1051 static struct nsim_trap_item *
1052 nsim_dev_trap_item_lookup(struct nsim_dev *nsim_dev, u16 trap_id)
1053 {
1054         struct nsim_trap_data *nsim_trap_data = nsim_dev->trap_data;
1055         int i;
1056
1057         for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) {
1058                 if (nsim_traps_arr[i].id == trap_id)
1059                         return &nsim_trap_data->trap_items_arr[i];
1060         }
1061
1062         return NULL;
1063 }
1064
1065 static int nsim_dev_devlink_trap_init(struct devlink *devlink,
1066                                       const struct devlink_trap *trap,
1067                                       void *trap_ctx)
1068 {
1069         struct nsim_dev *nsim_dev = devlink_priv(devlink);
1070         struct nsim_trap_item *nsim_trap_item;
1071
1072         nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id);
1073         if (WARN_ON(!nsim_trap_item))
1074                 return -ENOENT;
1075
1076         nsim_trap_item->trap_ctx = trap_ctx;
1077         nsim_trap_item->action = trap->init_action;
1078
1079         return 0;
1080 }
1081
1082 static int
1083 nsim_dev_devlink_trap_action_set(struct devlink *devlink,
1084                                  const struct devlink_trap *trap,
1085                                  enum devlink_trap_action action,
1086                                  struct netlink_ext_ack *extack)
1087 {
1088         struct nsim_dev *nsim_dev = devlink_priv(devlink);
1089         struct nsim_trap_item *nsim_trap_item;
1090
1091         nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id);
1092         if (WARN_ON(!nsim_trap_item))
1093                 return -ENOENT;
1094
1095         spin_lock(&nsim_dev->trap_data->trap_lock);
1096         nsim_trap_item->action = action;
1097         spin_unlock(&nsim_dev->trap_data->trap_lock);
1098
1099         return 0;
1100 }
1101
1102 static int
1103 nsim_dev_devlink_trap_group_set(struct devlink *devlink,
1104                                 const struct devlink_trap_group *group,
1105                                 const struct devlink_trap_policer *policer,
1106                                 struct netlink_ext_ack *extack)
1107 {
1108         struct nsim_dev *nsim_dev = devlink_priv(devlink);
1109
1110         if (nsim_dev->fail_trap_group_set)
1111                 return -EINVAL;
1112
1113         return 0;
1114 }
1115
1116 static int
1117 nsim_dev_devlink_trap_policer_set(struct devlink *devlink,
1118                                   const struct devlink_trap_policer *policer,
1119                                   u64 rate, u64 burst,
1120                                   struct netlink_ext_ack *extack)
1121 {
1122         struct nsim_dev *nsim_dev = devlink_priv(devlink);
1123
1124         if (nsim_dev->fail_trap_policer_set) {
1125                 NL_SET_ERR_MSG_MOD(extack, "User setup the operation to fail for testing purposes");
1126                 return -EINVAL;
1127         }
1128
1129         return 0;
1130 }
1131
1132 static int
1133 nsim_dev_devlink_trap_policer_counter_get(struct devlink *devlink,
1134                                           const struct devlink_trap_policer *policer,
1135                                           u64 *p_drops)
1136 {
1137         struct nsim_dev *nsim_dev = devlink_priv(devlink);
1138         u64 *cnt;
1139
1140         if (nsim_dev->fail_trap_policer_counter_get)
1141                 return -EINVAL;
1142
1143         cnt = &nsim_dev->trap_data->trap_policers_cnt_arr[policer->id - 1];
1144         *p_drops = (*cnt)++;
1145
1146         return 0;
1147 }
1148
1149 #define NSIM_LINK_SPEED_MAX     5000 /* Mbps */
1150 #define NSIM_LINK_SPEED_UNIT    125000 /* 1 Mbps given in bytes/sec to avoid
1151                                         * u64 overflow during conversion from
1152                                         * bytes to bits.
1153                                         */
1154
1155 static int nsim_rate_bytes_to_units(char *name, u64 *rate, struct netlink_ext_ack *extack)
1156 {
1157         u64 val;
1158         u32 rem;
1159
1160         val = div_u64_rem(*rate, NSIM_LINK_SPEED_UNIT, &rem);
1161         if (rem) {
1162                 pr_err("%s rate value %lluBps not in link speed units of 1Mbps.\n",
1163                        name, *rate);
1164                 NL_SET_ERR_MSG_MOD(extack, "TX rate value not in link speed units of 1Mbps.");
1165                 return -EINVAL;
1166         }
1167
1168         if (val > NSIM_LINK_SPEED_MAX) {
1169                 pr_err("%s rate value %lluMbps exceed link maximum speed 5000Mbps.\n",
1170                        name, val);
1171                 NL_SET_ERR_MSG_MOD(extack, "TX rate value exceed link maximum speed 5000Mbps.");
1172                 return -EINVAL;
1173         }
1174         *rate = val;
1175         return 0;
1176 }
1177
1178 static int nsim_leaf_tx_share_set(struct devlink_rate *devlink_rate, void *priv,
1179                                   u64 tx_share, struct netlink_ext_ack *extack)
1180 {
1181         struct nsim_dev_port *nsim_dev_port = priv;
1182         struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev;
1183         int vf_id = nsim_dev_port_index_to_vf_index(nsim_dev_port->port_index);
1184         int err;
1185
1186         err = nsim_rate_bytes_to_units("tx_share", &tx_share, extack);
1187         if (err)
1188                 return err;
1189
1190         nsim_dev->vfconfigs[vf_id].min_tx_rate = tx_share;
1191         return 0;
1192 }
1193
1194 static int nsim_leaf_tx_max_set(struct devlink_rate *devlink_rate, void *priv,
1195                                 u64 tx_max, struct netlink_ext_ack *extack)
1196 {
1197         struct nsim_dev_port *nsim_dev_port = priv;
1198         struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev;
1199         int vf_id = nsim_dev_port_index_to_vf_index(nsim_dev_port->port_index);
1200         int err;
1201
1202         err = nsim_rate_bytes_to_units("tx_max", &tx_max, extack);
1203         if (err)
1204                 return err;
1205
1206         nsim_dev->vfconfigs[vf_id].max_tx_rate = tx_max;
1207         return 0;
1208 }
1209
1210 struct nsim_rate_node {
1211         struct dentry *ddir;
1212         struct dentry *rate_parent;
1213         char *parent_name;
1214         u16 tx_share;
1215         u16 tx_max;
1216 };
1217
1218 static int nsim_node_tx_share_set(struct devlink_rate *devlink_rate, void *priv,
1219                                   u64 tx_share, struct netlink_ext_ack *extack)
1220 {
1221         struct nsim_rate_node *nsim_node = priv;
1222         int err;
1223
1224         err = nsim_rate_bytes_to_units("tx_share", &tx_share, extack);
1225         if (err)
1226                 return err;
1227
1228         nsim_node->tx_share = tx_share;
1229         return 0;
1230 }
1231
1232 static int nsim_node_tx_max_set(struct devlink_rate *devlink_rate, void *priv,
1233                                 u64 tx_max, struct netlink_ext_ack *extack)
1234 {
1235         struct nsim_rate_node *nsim_node = priv;
1236         int err;
1237
1238         err = nsim_rate_bytes_to_units("tx_max", &tx_max, extack);
1239         if (err)
1240                 return err;
1241
1242         nsim_node->tx_max = tx_max;
1243         return 0;
1244 }
1245
1246 static int nsim_rate_node_new(struct devlink_rate *node, void **priv,
1247                               struct netlink_ext_ack *extack)
1248 {
1249         struct nsim_dev *nsim_dev = devlink_priv(node->devlink);
1250         struct nsim_rate_node *nsim_node;
1251
1252         if (!nsim_esw_mode_is_switchdev(nsim_dev)) {
1253                 NL_SET_ERR_MSG_MOD(extack, "Node creation allowed only in switchdev mode.");
1254                 return -EOPNOTSUPP;
1255         }
1256
1257         nsim_node = kzalloc(sizeof(*nsim_node), GFP_KERNEL);
1258         if (!nsim_node)
1259                 return -ENOMEM;
1260
1261         nsim_node->ddir = debugfs_create_dir(node->name, nsim_dev->nodes_ddir);
1262
1263         debugfs_create_u16("tx_share", 0400, nsim_node->ddir, &nsim_node->tx_share);
1264         debugfs_create_u16("tx_max", 0400, nsim_node->ddir, &nsim_node->tx_max);
1265         nsim_node->rate_parent = debugfs_create_file("rate_parent", 0400,
1266                                                      nsim_node->ddir,
1267                                                      &nsim_node->parent_name,
1268                                                      &nsim_dev_rate_parent_fops);
1269
1270         *priv = nsim_node;
1271         return 0;
1272 }
1273
1274 static int nsim_rate_node_del(struct devlink_rate *node, void *priv,
1275                               struct netlink_ext_ack *extack)
1276 {
1277         struct nsim_rate_node *nsim_node = priv;
1278
1279         debugfs_remove(nsim_node->rate_parent);
1280         debugfs_remove_recursive(nsim_node->ddir);
1281         kfree(nsim_node);
1282         return 0;
1283 }
1284
1285 static int nsim_rate_leaf_parent_set(struct devlink_rate *child,
1286                                      struct devlink_rate *parent,
1287                                      void *priv_child, void *priv_parent,
1288                                      struct netlink_ext_ack *extack)
1289 {
1290         struct nsim_dev_port *nsim_dev_port = priv_child;
1291
1292         if (parent)
1293                 nsim_dev_port->parent_name = parent->name;
1294         else
1295                 nsim_dev_port->parent_name = NULL;
1296         return 0;
1297 }
1298
1299 static int nsim_rate_node_parent_set(struct devlink_rate *child,
1300                                      struct devlink_rate *parent,
1301                                      void *priv_child, void *priv_parent,
1302                                      struct netlink_ext_ack *extack)
1303 {
1304         struct nsim_rate_node *nsim_node = priv_child;
1305
1306         if (parent)
1307                 nsim_node->parent_name = parent->name;
1308         else
1309                 nsim_node->parent_name = NULL;
1310         return 0;
1311 }
1312
1313 static int
1314 nsim_dev_devlink_trap_drop_counter_get(struct devlink *devlink,
1315                                        const struct devlink_trap *trap,
1316                                        u64 *p_drops)
1317 {
1318         struct nsim_dev *nsim_dev = devlink_priv(devlink);
1319         u64 *cnt;
1320
1321         if (nsim_dev->fail_trap_drop_counter_get)
1322                 return -EINVAL;
1323
1324         cnt = &nsim_dev->trap_data->trap_pkt_cnt;
1325         *p_drops = (*cnt)++;
1326
1327         return 0;
1328 }
1329
1330 static const struct devlink_ops nsim_dev_devlink_ops = {
1331         .eswitch_mode_set = nsim_devlink_eswitch_mode_set,
1332         .eswitch_mode_get = nsim_devlink_eswitch_mode_get,
1333         .supported_flash_update_params = DEVLINK_SUPPORT_FLASH_UPDATE_OVERWRITE_MASK,
1334         .reload_actions = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT),
1335         .reload_down = nsim_dev_reload_down,
1336         .reload_up = nsim_dev_reload_up,
1337         .info_get = nsim_dev_info_get,
1338         .flash_update = nsim_dev_flash_update,
1339         .trap_init = nsim_dev_devlink_trap_init,
1340         .trap_action_set = nsim_dev_devlink_trap_action_set,
1341         .trap_group_set = nsim_dev_devlink_trap_group_set,
1342         .trap_policer_set = nsim_dev_devlink_trap_policer_set,
1343         .trap_policer_counter_get = nsim_dev_devlink_trap_policer_counter_get,
1344         .rate_leaf_tx_share_set = nsim_leaf_tx_share_set,
1345         .rate_leaf_tx_max_set = nsim_leaf_tx_max_set,
1346         .rate_node_tx_share_set = nsim_node_tx_share_set,
1347         .rate_node_tx_max_set = nsim_node_tx_max_set,
1348         .rate_node_new = nsim_rate_node_new,
1349         .rate_node_del = nsim_rate_node_del,
1350         .rate_leaf_parent_set = nsim_rate_leaf_parent_set,
1351         .rate_node_parent_set = nsim_rate_node_parent_set,
1352         .trap_drop_counter_get = nsim_dev_devlink_trap_drop_counter_get,
1353 };
1354
1355 #define NSIM_DEV_MAX_MACS_DEFAULT 32
1356 #define NSIM_DEV_TEST1_DEFAULT true
1357
1358 static int __nsim_dev_port_add(struct nsim_dev *nsim_dev, enum nsim_dev_port_type type,
1359                                unsigned int port_index)
1360 {
1361         struct devlink_port_attrs attrs = {};
1362         struct nsim_dev_port *nsim_dev_port;
1363         struct devlink_port *devlink_port;
1364         int err;
1365
1366         if (type == NSIM_DEV_PORT_TYPE_VF && !nsim_dev_get_vfs(nsim_dev))
1367                 return -EINVAL;
1368
1369         nsim_dev_port = kzalloc(sizeof(*nsim_dev_port), GFP_KERNEL);
1370         if (!nsim_dev_port)
1371                 return -ENOMEM;
1372         nsim_dev_port->port_index = nsim_dev_port_index(type, port_index);
1373         nsim_dev_port->port_type = type;
1374
1375         devlink_port = &nsim_dev_port->devlink_port;
1376         if (nsim_dev_port_is_pf(nsim_dev_port)) {
1377                 attrs.flavour = DEVLINK_PORT_FLAVOUR_PHYSICAL;
1378                 attrs.phys.port_number = port_index + 1;
1379         } else {
1380                 attrs.flavour = DEVLINK_PORT_FLAVOUR_PCI_VF;
1381                 attrs.pci_vf.pf = 0;
1382                 attrs.pci_vf.vf = port_index;
1383         }
1384         memcpy(attrs.switch_id.id, nsim_dev->switch_id.id, nsim_dev->switch_id.id_len);
1385         attrs.switch_id.id_len = nsim_dev->switch_id.id_len;
1386         devlink_port_attrs_set(devlink_port, &attrs);
1387         err = devl_port_register(priv_to_devlink(nsim_dev), devlink_port,
1388                                  nsim_dev_port->port_index);
1389         if (err)
1390                 goto err_port_free;
1391
1392         err = nsim_dev_port_debugfs_init(nsim_dev, nsim_dev_port);
1393         if (err)
1394                 goto err_dl_port_unregister;
1395
1396         nsim_dev_port->ns = nsim_create(nsim_dev, nsim_dev_port);
1397         if (IS_ERR(nsim_dev_port->ns)) {
1398                 err = PTR_ERR(nsim_dev_port->ns);
1399                 goto err_port_debugfs_exit;
1400         }
1401
1402         if (nsim_dev_port_is_vf(nsim_dev_port)) {
1403                 err = devl_rate_leaf_create(&nsim_dev_port->devlink_port,
1404                                             nsim_dev_port);
1405                 if (err)
1406                         goto err_nsim_destroy;
1407         }
1408
1409         devlink_port_type_eth_set(devlink_port, nsim_dev_port->ns->netdev);
1410         list_add(&nsim_dev_port->list, &nsim_dev->port_list);
1411
1412         return 0;
1413
1414 err_nsim_destroy:
1415         nsim_destroy(nsim_dev_port->ns);
1416 err_port_debugfs_exit:
1417         nsim_dev_port_debugfs_exit(nsim_dev_port);
1418 err_dl_port_unregister:
1419         devl_port_unregister(devlink_port);
1420 err_port_free:
1421         kfree(nsim_dev_port);
1422         return err;
1423 }
1424
1425 static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port)
1426 {
1427         struct devlink_port *devlink_port = &nsim_dev_port->devlink_port;
1428
1429         list_del(&nsim_dev_port->list);
1430         if (nsim_dev_port_is_vf(nsim_dev_port))
1431                 devl_rate_leaf_destroy(&nsim_dev_port->devlink_port);
1432         devlink_port_type_clear(devlink_port);
1433         nsim_destroy(nsim_dev_port->ns);
1434         nsim_dev_port_debugfs_exit(nsim_dev_port);
1435         devl_port_unregister(devlink_port);
1436         kfree(nsim_dev_port);
1437 }
1438
1439 static void nsim_dev_port_del_all(struct nsim_dev *nsim_dev)
1440 {
1441         struct nsim_dev_port *nsim_dev_port, *tmp;
1442
1443         list_for_each_entry_safe(nsim_dev_port, tmp,
1444                                  &nsim_dev->port_list, list)
1445                 __nsim_dev_port_del(nsim_dev_port);
1446 }
1447
1448 static int nsim_dev_port_add_all(struct nsim_dev *nsim_dev,
1449                                  unsigned int port_count)
1450 {
1451         int i, err;
1452
1453         for (i = 0; i < port_count; i++) {
1454                 err = __nsim_dev_port_add(nsim_dev, NSIM_DEV_PORT_TYPE_PF, i);
1455                 if (err)
1456                         goto err_port_del_all;
1457         }
1458         return 0;
1459
1460 err_port_del_all:
1461         nsim_dev_port_del_all(nsim_dev);
1462         return err;
1463 }
1464
1465 static int nsim_dev_reload_create(struct nsim_dev *nsim_dev,
1466                                   struct netlink_ext_ack *extack)
1467 {
1468         struct nsim_bus_dev *nsim_bus_dev = nsim_dev->nsim_bus_dev;
1469         struct devlink *devlink;
1470         int err;
1471
1472         devlink = priv_to_devlink(nsim_dev);
1473         nsim_dev = devlink_priv(devlink);
1474         INIT_LIST_HEAD(&nsim_dev->port_list);
1475         nsim_dev->fw_update_status = true;
1476         nsim_dev->fw_update_overwrite_mask = 0;
1477
1478         nsim_devlink_param_load_driverinit_values(devlink);
1479
1480         err = nsim_dev_dummy_region_init(nsim_dev, devlink);
1481         if (err)
1482                 return err;
1483
1484         err = nsim_dev_traps_init(devlink);
1485         if (err)
1486                 goto err_dummy_region_exit;
1487
1488         nsim_dev->fib_data = nsim_fib_create(devlink, extack);
1489         if (IS_ERR(nsim_dev->fib_data)) {
1490                 err = PTR_ERR(nsim_dev->fib_data);
1491                 goto err_traps_exit;
1492         }
1493
1494         err = nsim_dev_health_init(nsim_dev, devlink);
1495         if (err)
1496                 goto err_fib_destroy;
1497
1498         err = nsim_dev_psample_init(nsim_dev);
1499         if (err)
1500                 goto err_health_exit;
1501
1502         err = nsim_dev_hwstats_init(nsim_dev);
1503         if (err)
1504                 goto err_psample_exit;
1505
1506         err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count);
1507         if (err)
1508                 goto err_hwstats_exit;
1509
1510         nsim_dev->take_snapshot = debugfs_create_file("take_snapshot",
1511                                                       0200,
1512                                                       nsim_dev->ddir,
1513                                                       nsim_dev,
1514                                                 &nsim_dev_take_snapshot_fops);
1515         return 0;
1516
1517 err_hwstats_exit:
1518         nsim_dev_hwstats_exit(nsim_dev);
1519 err_psample_exit:
1520         nsim_dev_psample_exit(nsim_dev);
1521 err_health_exit:
1522         nsim_dev_health_exit(nsim_dev);
1523 err_fib_destroy:
1524         nsim_fib_destroy(devlink, nsim_dev->fib_data);
1525 err_traps_exit:
1526         nsim_dev_traps_exit(devlink);
1527 err_dummy_region_exit:
1528         nsim_dev_dummy_region_exit(nsim_dev);
1529         return err;
1530 }
1531
1532 int nsim_drv_probe(struct nsim_bus_dev *nsim_bus_dev)
1533 {
1534         struct nsim_dev *nsim_dev;
1535         struct devlink *devlink;
1536         int err;
1537
1538         devlink = devlink_alloc_ns(&nsim_dev_devlink_ops, sizeof(*nsim_dev),
1539                                  nsim_bus_dev->initial_net, &nsim_bus_dev->dev);
1540         if (!devlink)
1541                 return -ENOMEM;
1542         devl_lock(devlink);
1543         nsim_dev = devlink_priv(devlink);
1544         nsim_dev->nsim_bus_dev = nsim_bus_dev;
1545         nsim_dev->switch_id.id_len = sizeof(nsim_dev->switch_id.id);
1546         get_random_bytes(nsim_dev->switch_id.id, nsim_dev->switch_id.id_len);
1547         INIT_LIST_HEAD(&nsim_dev->port_list);
1548         nsim_dev->fw_update_status = true;
1549         nsim_dev->fw_update_overwrite_mask = 0;
1550         nsim_dev->max_macs = NSIM_DEV_MAX_MACS_DEFAULT;
1551         nsim_dev->test1 = NSIM_DEV_TEST1_DEFAULT;
1552         spin_lock_init(&nsim_dev->fa_cookie_lock);
1553
1554         dev_set_drvdata(&nsim_bus_dev->dev, nsim_dev);
1555
1556         nsim_dev->vfconfigs = kcalloc(nsim_bus_dev->max_vfs,
1557                                       sizeof(struct nsim_vf_config),
1558                                       GFP_KERNEL | __GFP_NOWARN);
1559         if (!nsim_dev->vfconfigs) {
1560                 err = -ENOMEM;
1561                 goto err_devlink_unlock;
1562         }
1563
1564         err = nsim_dev_resources_register(devlink);
1565         if (err)
1566                 goto err_vfc_free;
1567
1568         err = devlink_params_register(devlink, nsim_devlink_params,
1569                                       ARRAY_SIZE(nsim_devlink_params));
1570         if (err)
1571                 goto err_dl_unregister;
1572         nsim_devlink_set_params_init_values(nsim_dev, devlink);
1573
1574         err = nsim_dev_dummy_region_init(nsim_dev, devlink);
1575         if (err)
1576                 goto err_params_unregister;
1577
1578         err = nsim_dev_traps_init(devlink);
1579         if (err)
1580                 goto err_dummy_region_exit;
1581
1582         err = nsim_dev_debugfs_init(nsim_dev);
1583         if (err)
1584                 goto err_traps_exit;
1585
1586         nsim_dev->fib_data = nsim_fib_create(devlink, NULL);
1587         if (IS_ERR(nsim_dev->fib_data)) {
1588                 err = PTR_ERR(nsim_dev->fib_data);
1589                 goto err_debugfs_exit;
1590         }
1591
1592         err = nsim_dev_health_init(nsim_dev, devlink);
1593         if (err)
1594                 goto err_fib_destroy;
1595
1596         err = nsim_bpf_dev_init(nsim_dev);
1597         if (err)
1598                 goto err_health_exit;
1599
1600         err = nsim_dev_psample_init(nsim_dev);
1601         if (err)
1602                 goto err_bpf_dev_exit;
1603
1604         err = nsim_dev_hwstats_init(nsim_dev);
1605         if (err)
1606                 goto err_psample_exit;
1607
1608         err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count);
1609         if (err)
1610                 goto err_hwstats_exit;
1611
1612         nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_LEGACY;
1613         devlink_set_features(devlink, DEVLINK_F_RELOAD);
1614         devl_unlock(devlink);
1615         devlink_register(devlink);
1616         return 0;
1617
1618 err_hwstats_exit:
1619         nsim_dev_hwstats_exit(nsim_dev);
1620 err_psample_exit:
1621         nsim_dev_psample_exit(nsim_dev);
1622 err_bpf_dev_exit:
1623         nsim_bpf_dev_exit(nsim_dev);
1624 err_health_exit:
1625         nsim_dev_health_exit(nsim_dev);
1626 err_fib_destroy:
1627         nsim_fib_destroy(devlink, nsim_dev->fib_data);
1628 err_debugfs_exit:
1629         nsim_dev_debugfs_exit(nsim_dev);
1630 err_traps_exit:
1631         nsim_dev_traps_exit(devlink);
1632 err_dummy_region_exit:
1633         nsim_dev_dummy_region_exit(nsim_dev);
1634 err_params_unregister:
1635         devlink_params_unregister(devlink, nsim_devlink_params,
1636                                   ARRAY_SIZE(nsim_devlink_params));
1637 err_dl_unregister:
1638         devl_resources_unregister(devlink);
1639 err_vfc_free:
1640         kfree(nsim_dev->vfconfigs);
1641 err_devlink_unlock:
1642         devl_unlock(devlink);
1643         devlink_free(devlink);
1644         dev_set_drvdata(&nsim_bus_dev->dev, NULL);
1645         return err;
1646 }
1647
1648 static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev)
1649 {
1650         struct devlink *devlink = priv_to_devlink(nsim_dev);
1651
1652         if (devlink_is_reload_failed(devlink))
1653                 return;
1654         debugfs_remove(nsim_dev->take_snapshot);
1655
1656         if (nsim_dev_get_vfs(nsim_dev)) {
1657                 nsim_bus_dev_set_vfs(nsim_dev->nsim_bus_dev, 0);
1658                 if (nsim_esw_mode_is_switchdev(nsim_dev))
1659                         nsim_esw_legacy_enable(nsim_dev, NULL);
1660         }
1661
1662         nsim_dev_port_del_all(nsim_dev);
1663         nsim_dev_hwstats_exit(nsim_dev);
1664         nsim_dev_psample_exit(nsim_dev);
1665         nsim_dev_health_exit(nsim_dev);
1666         nsim_fib_destroy(devlink, nsim_dev->fib_data);
1667         nsim_dev_traps_exit(devlink);
1668         nsim_dev_dummy_region_exit(nsim_dev);
1669 }
1670
1671 void nsim_drv_remove(struct nsim_bus_dev *nsim_bus_dev)
1672 {
1673         struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
1674         struct devlink *devlink = priv_to_devlink(nsim_dev);
1675
1676         devlink_unregister(devlink);
1677         devl_lock(devlink);
1678         nsim_dev_reload_destroy(nsim_dev);
1679
1680         nsim_bpf_dev_exit(nsim_dev);
1681         nsim_dev_debugfs_exit(nsim_dev);
1682         devlink_params_unregister(devlink, nsim_devlink_params,
1683                                   ARRAY_SIZE(nsim_devlink_params));
1684         devl_resources_unregister(devlink);
1685         kfree(nsim_dev->vfconfigs);
1686         devl_unlock(devlink);
1687         devlink_free(devlink);
1688         dev_set_drvdata(&nsim_bus_dev->dev, NULL);
1689 }
1690
1691 static struct nsim_dev_port *
1692 __nsim_dev_port_lookup(struct nsim_dev *nsim_dev, enum nsim_dev_port_type type,
1693                        unsigned int port_index)
1694 {
1695         struct nsim_dev_port *nsim_dev_port;
1696
1697         port_index = nsim_dev_port_index(type, port_index);
1698         list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list)
1699                 if (nsim_dev_port->port_index == port_index)
1700                         return nsim_dev_port;
1701         return NULL;
1702 }
1703
1704 int nsim_drv_port_add(struct nsim_bus_dev *nsim_bus_dev, enum nsim_dev_port_type type,
1705                       unsigned int port_index)
1706 {
1707         struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
1708         int err;
1709
1710         devl_lock(priv_to_devlink(nsim_dev));
1711         if (__nsim_dev_port_lookup(nsim_dev, type, port_index))
1712                 err = -EEXIST;
1713         else
1714                 err = __nsim_dev_port_add(nsim_dev, type, port_index);
1715         devl_unlock(priv_to_devlink(nsim_dev));
1716         return err;
1717 }
1718
1719 int nsim_drv_port_del(struct nsim_bus_dev *nsim_bus_dev, enum nsim_dev_port_type type,
1720                       unsigned int port_index)
1721 {
1722         struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
1723         struct nsim_dev_port *nsim_dev_port;
1724         int err = 0;
1725
1726         devl_lock(priv_to_devlink(nsim_dev));
1727         nsim_dev_port = __nsim_dev_port_lookup(nsim_dev, type, port_index);
1728         if (!nsim_dev_port)
1729                 err = -ENOENT;
1730         else
1731                 __nsim_dev_port_del(nsim_dev_port);
1732         devl_unlock(priv_to_devlink(nsim_dev));
1733         return err;
1734 }
1735
1736 int nsim_drv_configure_vfs(struct nsim_bus_dev *nsim_bus_dev,
1737                            unsigned int num_vfs)
1738 {
1739         struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
1740         struct devlink *devlink = priv_to_devlink(nsim_dev);
1741         int ret = 0;
1742
1743         devl_lock(devlink);
1744         if (nsim_bus_dev->num_vfs == num_vfs)
1745                 goto exit_unlock;
1746         if (nsim_bus_dev->num_vfs && num_vfs) {
1747                 ret = -EBUSY;
1748                 goto exit_unlock;
1749         }
1750         if (nsim_bus_dev->max_vfs < num_vfs) {
1751                 ret = -ENOMEM;
1752                 goto exit_unlock;
1753         }
1754
1755         nsim_bus_dev_set_vfs(nsim_bus_dev, num_vfs);
1756         if (nsim_esw_mode_is_switchdev(nsim_dev)) {
1757                 if (num_vfs) {
1758                         ret = nsim_esw_switchdev_enable(nsim_dev, NULL);
1759                         if (ret) {
1760                                 nsim_bus_dev_set_vfs(nsim_bus_dev, 0);
1761                                 goto exit_unlock;
1762                         }
1763                 } else {
1764                         nsim_esw_legacy_enable(nsim_dev, NULL);
1765                 }
1766         }
1767
1768 exit_unlock:
1769         devl_unlock(devlink);
1770
1771         return ret;
1772 }
1773
1774 int nsim_dev_init(void)
1775 {
1776         nsim_dev_ddir = debugfs_create_dir(DRV_NAME, NULL);
1777         return PTR_ERR_OR_ZERO(nsim_dev_ddir);
1778 }
1779
1780 void nsim_dev_exit(void)
1781 {
1782         debugfs_remove_recursive(nsim_dev_ddir);
1783 }